/* roulang page: index */
:root {
            --primary: #3D5BF5;
            --primary-hover: #2A3FD6;
            --primary-dark: #2433B0;
            --accent: #06B6A0;
            --accent-hover: #05968A;
            --highlight: #F97362;
            --highlight-hover: #E85A48;
            --bg-body: #F6F8FC;
            --bg-card: #FFFFFF;
            --bg-soft: #EAF0FA;
            --text-main: #14223C;
            --text-secondary: #43536B;
            --text-muted: #64748B;
            --border-main: #D9E1EC;
            --border-light: #E7EDF4;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 6px 20px rgba(20, 40, 90, 0.06);
            --shadow-hover: 0 12px 32px rgba(20, 40, 90, 0.12);
            --font-main: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
        }

        * {
            box-sizing: border-box;
            padding: 0;
            margin: 0;
        }

        body {
            font-family: var(--font-main);
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        }

        img {
            display: block;
            max-width: 100%;
        }

        button,
        input {
            font-family: inherit;
        }

        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(15, 35, 80, 0.07);
        }

        .header-row {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            height: 72px;
            position: relative;
        }

        .logo-center {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            align-items: center;
            z-index: 2;
        }

        .brand-text {
            font-weight: 700;
            font-size: 22px;
            letter-spacing: 0.01em;
            color: var(--text-main);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .brand-text span {
            color: var(--primary);
        }

        .nav-side {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .nav-side.left {
            margin-right: auto;
            padding-left: 240px;
        }

        .nav-side.right {
            margin-left: auto;
            padding-right: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-link-item {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 4px 2px;
            white-space: nowrap;
        }

        .nav-link-item:hover {
            color: var(--primary);
        }

        .nav-link-item.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link-item.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -4px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }

        .nav-cta-link {
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            transition: all 0.2s;
        }

        .nav-cta-link:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(61, 91, 245, 0.28);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-main);
            cursor: pointer;
            width: 44px;
            height: 44px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            margin-right: auto;
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border-light);
            padding: 16px 0 20px;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu-links {
            list-style: none;
        }

        .mobile-menu-links li a {
            display: block;
            padding: 12px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            border-radius: 8px;
        }

        .mobile-menu-links li a:hover,
        .mobile-menu-links li a.active {
            background: var(--bg-soft);
            color: var(--primary);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 16px;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            border: none;
            cursor: pointer;
            transition: all 0.2s;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(61, 91, 245, 0.25);
            outline-offset: 2px;
        }

        .btn:active {
            transform: translateY(2px);
        }

        .btn-highlight {
            background: var(--highlight);
            color: #fff;
            box-shadow: 0 4px 12px rgba(249, 115, 98, 0.28);
        }

        .btn-highlight:hover {
            background: var(--highlight-hover);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(249, 115, 98, 0.35);
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 16px rgba(61, 91, 245, 0.24);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 24px rgba(61, 91, 245, 0.32);
        }

        .btn-outline {
            background: #fff;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }

        .btn-outline:hover {
            background: #EEF2FF;
            color: var(--primary-dark);
            transform: translateY(-3px);
        }

        .btn-ghost-light {
            background: rgba(255, 255, 255, 0.85);
            color: var(--text-main);
            border: 1px solid var(--border-light);
        }

        .btn-ghost-light:hover {
            background: #fff;
            box-shadow: var(--shadow-card);
            color: var(--primary);
            transform: translateY(-3px);
        }

        /* Modal mask & Global */
        .modal-backdrop {
            position: fixed;
            top: 0;
            left: 0;
            z-index: 9999;
            width: 100%;
            height: 100%;
            background: rgba(20, 35, 60, 0.5);
            backdrop-filter: blur(4px);
            display: flex;
            align-items: center;
            justify-content: center;
            visibility: hidden;
            opacity: 0;
            transition: visibility 0.3s, opacity 0.3s;
        }

        .modal-backdrop.show {
            visibility: visible;
            opacity: 1;
        }

        .modal-box {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            max-width: 480px;
            width: calc(100% - 40px);
            margin: 20px;
            padding: 32px;
            box-shadow: 0 20px 50px rgba(20, 30, 60, 0.2);
        }

        .check-list-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin: 12px 0;
        }
        .check-list-item i {
            color: var(--accent);
            margin-top: 4px;
        }

        /* Hero */
        .hero-section {
            position: relative;
            padding: 88px 0 80px;
            overflow: hidden;
        }

        .hero-bg-grad {
            position: absolute;
            top: 0;
            right: 0;
            width: 40%;
            height: 70%;
            background: radial-gradient(ellipse at center, rgba(61, 91, 245, 0.08) 0%, rgba(255, 255, 255, 0.02) 70%);
            pointer-events: none;
        }

        .hero-text-side {
            position: relative;
            z-index: 2;
        }

        .hero-pretitle {
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--primary);
            background: #EEF2FF;
            display: inline-block;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: 44px;
            line-height: 1.2;
            font-weight: 700;
            letter-spacing: -0.015em;
            color: var(--text-main);
            margin: 16px 0 20px;
        }

        .hero-title em {
            color: var(--primary);
            font-style: normal;
            position: relative;
        }

        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 580px;
            margin: 0 0 28px;
        }

        .hero-feature-badge {
            background: rgba(255, 255, 255, 0.85);
            border: 1px solid var(--border-light);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            border-radius: 999px;
            padding: 7px 14px;
            font-size: 13px;
            font-weight: 500;
            color: var(--ink);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-feature-badge i {
            color: var(--accent);
        }

        .hero-img-wrap {
            position: relative;
            z-index: 2;
        }

        /* Feature Section */
        .section-padding {
            padding: 90px 0;
        }

        .section-title {
            font-size: 32px;
            line-height: 1.25;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text-main);
            text-align: center;
            margin-bottom: 12px;
        }

        .section-head-desc {
            max-width: 680px;
            margin: 0 auto 56px;
            text-align: center;
            font-size: 16px;
            color: var(--text-secondary);
        }

        .game-num-block {
            display: inline-block;
            font-size: 15px;
            font-weight: 700;
            color: var(--primary);
            background: #EEF2FF;
            border-radius: 8px;
            padding: 4px 12px;
            line-height: 1.6;
            margin-bottom: 14px;
        }

        .score-points .arrow {
            color: var(--accent);
            font-weight: 700;
            margin: 0 4px;
        }

        /* Schedule and Ranking */
        .schedule-list {
            border: 1px solid var(--border-light);
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 8px 0;
        }

        .schedule-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            border-bottom: 1px solid #F1F5F9;
            gap: 16px;
        }
        .schedule-item:last-child {
            border-bottom: none;
        }

        .schedule-item .team-names {
            font-weight: 600;
            font-size: 15px;
        }

        .schedule-item .vs {
            color: var(--text-muted);
            background: #F8FAFC;
            font-size: 12px;
            padding: 2px 8px;
            border-radius: 6px;
            font-weight: 600;
            margin: 0 4px;
        }

        .schedule-item .time-badge {
            background: #EEF2FF;
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 8px;
            padding: 6px 12px;
            white-space: nowrap;
        }

        /* Multi-theme cards */
        .theme-h-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding: 12px 4px 20px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }

        .theme-h-scroll::-webkit-scrollbar {
            height: 6px;
        }

        .theme-h-scroll::-webkit-scrollbar-track {
            background: #EDF1F7;
            border-radius: 3px;
        }

        .theme-h-scroll::-webkit-scrollbar-thumb {
            background: #C7D0DE;
            border-radius: 3px;
        }

        .theme-card-mini {
            min-width: 260px;
            max-width: 260px;
            scroll-snap-align: start;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: #fff;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: transform .2s, box-shadow .2s;
        }

        .theme-card-mini:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .theme-card-mini .thumb img {
            width: 100%;
            height: 130px;
            object-fit: cover;
        }

        .theme-card-mini .ctx {
            padding: 18px;
        }

        /* Rank table component */
        .rank-list {
            list-style: none;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            background: #fff;
        }

        .rank-list-item {
            display: grid;
            grid-template-columns: 64px 1fr auto;
            align-items: center;
            gap: 20px;
            padding: 16px 22px;
            border-bottom: 1px solid #F1F5F9;
        }
        .rank-list-item:last-child {
            border-bottom: none;
        }

        .rank-no {
            font-weight: 700;
            color: var(--text-muted);
            font-size: 18px;
        }
        .rank-no.first {
            color: #fff;
            background: linear-gradient(120deg, #FBB040, #F97362);
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .rank-team {
            font-weight: 600;
            font-size: 16px;
        }

        .rank-point {
            color: var(--primary);
            font-weight: 700;
            font-size: 18px;
            text-align: right;
            min-width: 56px;
        }

        /* Bracket UI */
        .bracket-section .round-col {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .round-head {
            background: #F1F4F9;
            font-size: 13px;
            font-weight: 700;
            color: var(--text-secondary);
            text-align: center;
            padding: 9px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .match-box {
            border-bottom: 1px solid #F1F5F9;
            padding: 12px 16px;
        }

        .match-box:last-child {
            border-bottom: none;
        }

        .match-team {
            display: flex;
            justify-content: space-between;
            font-size: 14px;
            line-height: 2;
        }

        .match-team.win {
            color: var(--ink);
            font-weight: 700;
        }

        .match-team.lose {
            color: var(--text-muted);
        }

        .match-seed {
            font-size: 12px;
            background: var(--bg-soft);
            display: inline-block;
            border-radius: 6px;
            padding: 2px 8px;
            font-weight: 600;
            color: var(--text-secondary);
        }

        /* Countdown widget */
        .countdown-card {
            background: linear-gradient(135deg, #fff 0%, #F6F9FF 100%);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px;
        }

        .countdown-flex {
            display: flex;
            align-items: baseline;
            justify-content: center;
            gap: 8px;
            margin: 12px 0;
        }

        .digit {
            font-size: 46px;
            font-weight: 800;
            letter-spacing: -0.02em;
            font-variant-numeric: tabular-nums;
            color: var(--ink);
            min-width: 72px;
            text-align: center;
        }

        .unit-label {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 600;
            font-variant-numeric: tabular-nums;
        }

        .dots {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
        }

        /* Social proof */
        .proof-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
        }

        .tag-simple {
            background:var(--bg-soft);
            color: var(--primary);
            font-size:12px;
            font-weight:600;
            border-radius:999px;
            padding: 3px 10px;
        }

        /* Content cards */
        .feat-list-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 26px;
            transition: box-shadow .2s, transform .2s;
        }

        .feat-list-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .feat-list-item {
            display: flex;
            border-bottom: 1px solid #F1F5F9;
            padding: 14px 0;
            align-items: flex-start;
        }
        .feat-list-item:last-child {
            border-bottom: none;
        }

        .feat-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: #EEF2FF;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
            margin-right: 16px;
        }

        /* News cards */
        .post-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: transform .2s, box-shadow .2s;
            height: 100%;
            background: #fff;
            display: flex;
            flex-direction: column;
        }

        .post-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .post-card .cover img {
            height: 230px;
            object-fit: cover;
            width: 100%;
        }

        .post-card-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .list-item-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 18px 20px;
            margin-bottom: 12px;
            transition: transform 0.2s, box-shadow .2s;
        }
        .list-item-card:hover {
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }

        /* FAQ */
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 0 24px;
            margin-bottom: 12px;
            transition: box-shadow .2s;
        }

        .faq-item.active {
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            border: none;
            background: none;
            cursor: pointer;
            line-height: 1.5;
            text-align: left;
            gap: 20px;
        }

        .faq-question:focus-visible {
            outline: 2px solid rgba(61,91,245,.4);
            border-radius:4px;
        }

        .faq-icon {
            font-size: 22px;
            color: var(--text-muted);
            flex-shrink: 0;
            font-weight: 300;
            transition: transform 0.25s ease;
            transform: rotate(0deg);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding .2s;
            color: var(--text-secondary);
            line-height: 1.85;
            padding: 0;
        }

        .faq-item.active .faq-answer {
            max-height: 320px;
            padding: 0 0 22px;
        }

        /* CTA Block */
        .cta-block {
            background: #EEF2FF;
            border: 1px solid #DDE4F5;
            border-radius: 24px;
            padding: 52px 48px;
            position: relative;
            overflow: hidden;
        }

        .cta-block-bg {
            position: absolute;
            right: -80px;
            top: -80px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(61,91,245,.08), transparent 70%);
            border-radius: 50%;
        }

        /* Inner page hero */
        .page-hero {
            padding: 60px 0 40px;
            background: linear-gradient(180deg,#F0F4FB 0%, transparent 100%);
        }

        .breadcrumb-item a {
            color: var(--text-muted);
        }
        .breadcrumb-item a:hover {
            color: var(--primary);
        }

        /* Footer */
        .site-footer {
            background: #F1F4F9;
            border-top: 1px solid var(--border-light);
            padding: 80px 0 32px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
            gap: 48px;
        }

        .footer-link-list {
            list-style: none;
        }

        .footer-link-list li {
            margin: 10px 0;
        }

        .footer-link-list li a {
            color: var(--text-secondary);
            font-size: 15px;
        }

        .footer-link-list li a:hover {
            color: var(--primary);
        }

        .bottom-copyright {
            border-top: 1px solid #DFE6EF;
            margin-top: 56px;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
            color: var(--text-muted);
        }

        /* Marquee */
        .marquee-wrap {
            overflow: hidden;
            background: #fff;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            padding: 14px 0;
        }

        .marquee-inline {
            display: inline-block;
            white-space: nowrap;
            animation: scrollx 26s linear infinite;
        }

        .marquee-track {
            display: flex;
            gap: 48px;
            align-items: center;
        }

        @keyframes scrollx {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        /* TimeLine */
        .process-step {
            display: flex;
            gap: 24px;
        }

        .step-line {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .step-circle {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            box-shadow: 0 6px 16px rgba(61,91,245,.25);
            flex-shrink: 0;
        }

        .step-bar {
            flex: 1;
            width: 2px;
            background: #D9E1EC;
            margin: 8px 0;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container-custom {
                padding: 0 20px;
            }
            .nav-side {
                gap: 18px;
            }
            .nav-side.left {
                padding-left: 140px;
            }
            .nav-links {
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .hero-title {
                font-size: 36px;
            }
        }

        @media (max-width: 768px) {
            .header-row {
                height: 60px;
                justify-content: center;
            }
            .logo-center {
                position: relative;
                transform: none;
                margin: 0 auto;
                left: auto;
                order: 1;
            }
            .desktop-nav-wrapper {
                display: none !important;
            }
            .mobile-toggle {
                display: inline-flex;
                order: 0;
                margin-right: 0;
            }
            .nav-right-cta {
                display: none;
            }
            .brand-text {
                font-size: 18px;
            }
            .nav-side, .nav-side.left, .nav-side.right {
                all: unset;
            }
            .mobile-menu {
                position: fixed;
                z-index: 100;
                left: 0;
                right: 0;
                top: 60px;
                max-height: calc(100vh - 60px);
                overflow-y: auto;
            }
            .hero-title {
                font-size: 28px;
            }
            .section-title {
                font-size: 26px;
            }
            .section-padding {
                padding: 55px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-block {
                padding: 36px 24px;
                border-radius: 18px;
            }
            .footer-bottom-copy {
                flex-direction: column;
                gap: 8px;
                align-items: flex-start;
            }
            .schedule-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .container-custom {
                padding: 0 18px;
            }
            .hero-section {
                padding: 48px 0 50px;
            }
            .brand-text i {
                font-size: 20px;
            }
            .rank-list-item {
                grid-template-columns: 40px 1fr auto;
                gap: 12px;
                padding: 12px 14px;
            }
            .bottom-copyright{
                flex-direction: column;
                gap: 10px;
                align-items:flex-start;
            }
        }

        @media (max-width: 480px) {
            .hero-title {
                font-size: 24px;
            }
            .nav-cta-link {
                display: none;
            }
            .process-step {
                gap: 12px;
            }
            .theme-card-mini {
                min-width: 220px;
            }
            .countdown-flex .digit {
                font-size: 34px;
                min-width: 56px;
            }
        }

/* roulang page: article */
:root {
            --primary: #3D5BF5;
            --primary-hover: #2A3FD6;
            --primary-soft: #EAF0FA;
            --accent: #06B6A0;
            --cta: #F97362;
            --cta-hover: #E85A48;
            --bg: #F6F8FC;
            --surface: #FFFFFF;
            --surface-alt: #EAF0FA;
            --ink: #14223C;
            --ink-soft: #43536B;
            --ink-muted: #64748B;
            --border: #D9E1EC;
            --border-soft: #E7EDF4;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 6px 20px rgba(20, 40, 90, 0.06);
            --shadow-hover: 0 12px 32px rgba(20, 40, 90, 0.12);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            background: var(--bg);
            color: var(--ink);
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease, background .2s ease, border .2s ease, box-shadow .2s ease, transform .2s ease;
        }

        a:hover {
            color: var(--primary-hover);
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 640px) {
            .container-custom {
                padding: 0 16px;
            }
        }

        .body-bg {
            background: var(--bg);
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            left: 0;
            right: 0;
            z-index: 80;
            background: rgba(246, 248, 252, .86);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-soft);
            transition: box-shadow .3s ease, background .3s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, .9);
            box-shadow: 0 10px 30px rgba(20, 40, 90, .06);
        }

        .site-header .header-mobile-row {
            position: relative;
        }

        .header-row {
            position: relative;
            height: 72px;
            width: 100%;
        }

        .mobile-toggle {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-soft);
            background: #fff;
            color: var(--ink);
            font-size: 18px;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            transition: background .2s, color .2s, border-color .2s;
        }

        .mobile-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .logo-center {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            white-space: nowrap;
        }

        .brand-text {
            color: var(--ink);
            font-size: 22px;
            font-weight: 800;
            letter-spacing: .5px;
            display: inline-flex;
            align-items: center;
            line-height: 1.2;
        }

        .brand-text i {
            color: var(--primary);
        }

        .brand-text span {
            color: var(--ink);
            font-weight: 500;
            margin-left: 2px;
        }

        .desktop-nav-wrapper {
            display: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .nav-link-item,
        .nav-cta-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 14px;
            font-size: 15px;
            color: var(--ink-soft);
            border-radius: var(--radius-sm);
            position: relative;
            font-weight: 500;
            transition: color .2s, background .2s;
        }

        .nav-link-item:hover {
            color: var(--primary);
            background: rgba(61, 91, 245, .06);
        }

        .nav-link-item.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link-item.active::after {
            content: '';
            position: absolute;
            left: 50%;
            bottom: 3px;
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--primary);
            transform: translateX(-50%);
        }

        .nav-cta-link {
            background: var(--primary);
            color: #fff;
            font-weight: 500;
            margin-left: 8px;
            box-shadow: 0 4px 12px rgba(61, 91, 245, .22);
        }

        .nav-cta-link:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-1px);
        }

        .mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border-soft);
            padding: 14px 0 20px;
            box-shadow: 0 16px 30px rgba(20, 40, 90, .08);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .mobile-menu-links li a {
            display: block;
            padding: 12px 24px;
            border-radius: 10px;
            color: var(--ink-soft);
            font-size: 16px;
            font-weight: 500;
        }

        .mobile-menu-links li a:hover,
        .mobile-menu-links li a.active {
            color: var(--primary);
            background: #F1F5FD;
        }

        @media (min-width: 1024px) {
            .mobile-toggle {
                display: none;
            }

            .desktop-nav-wrapper {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .desktop-nav-wrapper.left {
                position: absolute;
                left: 0;
                top: 50%;
                transform: translateY(-50%);
            }

            .desktop-nav-wrapper.right {
                position: absolute;
                right: 0;
                top: 50%;
                transform: translateY(-50%);
            }
        }

        /* ===== 文章主体 ===== */
        .article-page-main {
            padding: 52px 0 72px;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--ink-muted);
            margin-bottom: 22px;
        }

        .article-breadcrumb a {
            color: var(--ink-muted);
        }

        .article-breadcrumb a:hover {
            color: var(--primary);
        }

        .article-breadcrumb i {
            font-size: 11px;
            color: #B8C4D6;
        }

        .article-breadcrumb .current {
            color: var(--ink-soft);
            max-width: 320px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-paper {
            background: #fff;
            border-radius: 20px;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            padding: 34px 36px 44px;
            overflow: hidden;
        }

        .article-cover-wrap {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            min-height: 210px;
            background-color: var(--primary-soft);
            background-image: linear-gradient(120deg, rgba(61, 91, 245, .08), rgba(6, 182, 160, .04)), url('/assets/images/backpic/back-3.webp');
            background-position: center;
            background-size: cover;
            background-repeat: no-repeat;
            display: flex;
            align-items: flex-end;
            padding: 24px 26px;
            margin-bottom: 26px;
        }

        .article-cover-inner {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, .9);
            border-radius: 999px;
            padding: 8px 16px;
            font-size: 13px;
            color: var(--ink-soft);
            box-shadow: 0 6px 20px rgba(20, 40, 90, .08);
        }

        .article-head {
            border-bottom: 1px solid var(--border-soft);
            padding-bottom: 26px;
            margin-bottom: 18px;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            padding: 6px 14px;
            margin-bottom: 14px;
        }

        .article-title {
            font-size: 34px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--ink);
            margin: 0 0 18px;
            letter-spacing: .5px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px 20px;
            font-size: 14px;
            color: var(--ink-muted);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--primary);
            opacity: .72;
            width: 16px;
        }

        .article-content {
            font-size: 16px;
            line-height: 2;
            color: #2C3A52;
            overflow-wrap: break-word;
        }

        .article-content p {
            margin: 0 0 24px;
        }

        .article-content h2 {
            font-size: 24px;
            line-height: 1.4;
            color: var(--ink);
            font-weight: 700;
            margin: 38px 0 18px;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
        }

        .article-content h3 {
            font-size: 20px;
            color: var(--ink);
            font-weight: 700;
            margin: 30px 0 14px;
        }

        .article-content h4 {
            font-size: 17px;
            color: var(--ink);
            font-weight: 700;
            margin: 24px 0 12px;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--primary-hover);
        }

        .article-content ul,
        .article-content ol {
            padding-left: 24px;
            margin: 0 0 26px;
        }

        .article-content li {
            margin: 8px 0;
        }

        .article-content img {
            border-radius: 14px;
            margin: 28px auto;
            box-shadow: 0 10px 26px rgba(20, 40, 90, .08);
        }

        .article-content blockquote {
            margin: 28px 0;
            padding: 18px 22px;
            background: var(--primary-soft);
            border-radius: 12px;
            color: var(--ink-soft);
            font-size: 15px;
            border-left: 4px solid var(--primary);
        }

        .article-content pre {
            background: #101E3A;
            color: #E6EDFF;
            border-radius: 14px;
            padding: 18px 20px;
            overflow-x: auto;
            font-size: 14px;
            line-height: 1.8;
            margin: 24px 0;
        }

        .article-content code {
            font-family: "SFMono-Regular", Consolas, monospace;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 26px 0;
            border-radius: 12px;
            overflow: hidden;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border-soft);
            padding: 12px 16px;
            text-align: left;
        }

        .article-content th {
            background: var(--primary-soft);
            color: var(--ink);
            font-weight: 600;
        }

        .article-empty {
            text-align: center;
            padding: 80px 20px 90px;
        }

        .article-empty-icon {
            width: 76px;
            height: 76px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            color: var(--primary);
        }

        .article-empty h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--ink);
            margin: 0 0 10px;
        }

        .article-empty p {
            color: var(--ink-muted);
            font-size: 15px;
            margin-bottom: 26px;
        }

        @media (max-width: 640px) {
            .article-paper {
                padding: 24px 18px 30px;
                border-radius: 16px;
            }

            .article-title {
                font-size: 25px;
                line-height: 1.45;
            }

            .article-cover-wrap {
                min-height: 150px;
                padding: 16px;
            }
        }

        /* ===== 入口辅助区块 ===== */
        .section-pad {
            padding: 76px 0;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 1.5px;
            background: var(--primary-soft);
            border-radius: 999px;
            padding: 6px 16px;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 32px;
            line-height: 1.3;
            color: var(--ink);
            font-weight: 700;
            margin: 0 0 16px;
        }

        .section-desc {
            color: var(--ink-muted);
            font-size: 16px;
            max-width: 640px;
            line-height: 1.8;
        }

        .entry-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
            margin-top: 38px;
        }

        .entry-card {
            background: #fff;
            border-radius: 18px;
            border: 1px solid var(--border-soft);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform .25s ease, box-shadow .25s ease;
        }

        .entry-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .entry-cover {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }

        .entry-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .entry-card:hover .entry-cover img {
            transform: scale(1.05);
        }

        .entry-body {
            padding: 20px 20px 22px;
        }

        .entry-body h3 {
            margin: 0 0 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
        }

        .entry-body p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--ink-muted);
            margin: 0 0 16px;
        }

        .link-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .link-more:hover {
            color: var(--primary-hover);
        }

        @media (max-width: 1024px) {
            .entry-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 600px) {
            .entry-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            margin-top: 34px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            border: 1px solid var(--border-soft);
            border-radius: 14px;
            background: #fff;
            padding: 0 22px;
            overflow: hidden;
            transition: box-shadow .25s ease, border-color .25s ease;
        }

        .faq-item.open {
            border-color: rgba(61, 91, 245, .35);
            box-shadow: 0 8px 24px rgba(20, 40, 90, .06);
        }

        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: transparent;
            border: none;
            padding: 20px 0;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            text-align: left;
        }

        .faq-q i {
            color: var(--ink-muted);
            transition: transform .3s ease, color .3s ease;
            margin-left: 14px;
            flex-shrink: 0;
        }

        .faq-item.open .faq-q i {
            transform: rotate(45deg);
            color: var(--primary);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }

        .faq-a-inner {
            padding-bottom: 20px;
            font-size: 15px;
            line-height: 1.95;
            color: var(--ink-soft);
            border-top: 1px dashed var(--border-soft);
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .cta-panel {
            background: linear-gradient(135deg, #EAF0FA 0%, #F6F8FC 58%, #F3FAF8 100%);
            border: 1px solid rgba(61, 91, 245, .12);
            border-radius: 24px;
            padding: 52px 40px;
            display: flex;
            align-items: center;
            gap: 40px;
            justify-content: space-between;
            box-shadow: var(--shadow-card);
        }

        .cta-panel h2 {
            font-size: 28px;
            color: var(--ink);
            font-weight: 700;
            margin: 0 0 10px;
        }

        .cta-panel p {
            color: var(--ink-muted);
            font-size: 15px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            padding: 12px 22px;
            line-height: 1.2;
            border: 1px solid transparent;
            transition: all .2s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 16px rgba(61, 91, 245, .24);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 22px rgba(61, 91, 245, .28);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-cta {
            background: var(--cta);
            color: #fff;
            box-shadow: 0 6px 18px rgba(249, 115, 98, .26);
        }

        .btn-cta:hover {
            background: var(--cta-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(249, 115, 98, .3);
        }

        .btn-cta:active {
            transform: translateY(0);
        }

        .btn-outline {
            background: #fff;
            border-color: var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-soft);
            color: var(--primary-hover);
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 27px;
            }

            .section-pad {
                padding: 54px 0;
            }

            .cta-panel {
                flex-direction: column;
                text-align: center;
                padding: 34px 22px;
            }

            .cta-panel p {
                margin-bottom: 6px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #F1F4F9;
            border-top: 1px solid var(--border-soft);
            margin-top: 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
            gap: 44px;
            padding: 66px 0 44px;
        }

        .footer-link-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-link-list li {
            margin-bottom: 12px;
        }

        .footer-link-list a {
            color: var(--ink-muted);
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .footer-link-list a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding: 20px 0 26px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            font-size: 14px;
            color: var(--ink-muted);
        }

        .skill-line {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        @media (max-width: 1024px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 34px;
                padding: 52px 0 36px;
            }
        }

        @media (max-width: 620px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding: 44px 0 30px;
            }

            .footer-bottom {
                flex-direction: column;
                justify-content: center;
                text-align: center;
                padding: 20px 0 24px;
            }
        }

        /* ===== 其他工具类 ===== */
        .text-ink {
            color: var(--ink);
        }
        .text-ink-soft {
            color: var(--ink-soft);
        }
        .text-ink-muted {
            color: var(--ink-muted);
        }

/* roulang page: category1 */
:root {
  --primary: #3D5BF5;
  --primary-dark: #2A3FD6;
  --secondary: #06B6A0;
  --accent: #F97362;
  --page-bg: #F6F8FC;
  --card-bg: #FFFFFF;
  --soft-block: #EAF0FA;
  --heading-color: #14223C;
  --subtext-color: #43536B;
  --muted-color: #64748B;
  --border-color: #D9E1EC;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 6px 20px rgba(20, 40, 90, 0.06);
  --shadow-md: 0 12px 32px rgba(20, 40, 90, 0.12);
  --safe-width: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: var(--page-bg);
  color: var(--heading-color);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img, svg, video { display: block; max-width: 100%; }
a { text-decoration: none; color: var(--primary); transition: color 0.2s ease; }
a:hover, a:focus-visible { color: var(--primary-dark); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
button { cursor: pointer; font-family: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, p { margin: 0; }

.container-custom {
  width: 100%;
  max-width: var(--safe-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.text-ink { color: var(--heading-color); }
.text-ink-soft { color: var(--subtext-color); }
.text-ink-muted { color: var(--muted-color); }
.nav-link-item:hover { color: var(--primary); }

/* header & navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border-color);
  transition: box-shadow 0.25s ease, background 0.25s ease;
}
.site-header.scrolled {
  background: #ffffff;
  box-shadow: 0 12px 32px rgba(20, 40, 90, 0.08);
}
.header-row {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 72px;
  gap: 24px;
}
.brand-text {
  display: inline-flex;
  align-items: center;
  font-size: 22px;
  font-weight: 800;
  color: var(--heading-color);
  white-space: nowrap;
}
.brand-text span { color: var(--primary); font-weight: 500; }
.logo-center { display: flex; justify-content: center; grid-column: 2; grid-row: 1; }
.nav-side.left { grid-column: 1; grid-row: 1; display: flex; }
.nav-side.right { grid-column: 3; grid-row: 1; display: flex; justify-content: flex-end; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a { font-size: 15px; color: var(--subtext-color); padding: 8px 12px; border-radius: 8px; font-weight: 500; }
.nav-links a:hover { color: var(--primary); background: #F0F3FF; }
.nav-links .nav-link-item { position: relative; }
.nav-links .nav-link-item::after {
  content: "";
  position: absolute;
  left: 50%;
  right: 50%;
  bottom: 2px;
  height: 2px;
  background: var(--primary);
  border-radius: 999px;
  transition: left 0.2s ease, right 0.2s ease;
}
.nav-links .nav-link-item:hover::after,
.nav-links .nav-link-item.active::after { left: 12px; right: 12px; }
.nav-links .nav-link-item.active { color: var(--primary); font-weight: 600; }
.nav-cta-link {
  background: var(--soft-block) !important;
  color: var(--primary) !important;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  border: 1px solid transparent;
}
.nav-cta-link:hover { background: #e5ecf8 !important; border-color: rgba(61,91,245,.25); }
.mobile-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: #f4f6fb;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--heading-color);
  font-size: 18px;
  transition: 0.2s ease;
}
.mobile-toggle:hover { background: var(--soft-block); color: var(--primary); }
.mobile-menu { display: none; background: #fff; border-top: 1px solid #E7EDF4; padding: 12px 8px 22px; }
.mobile-menu.open { display: block; }
.mobile-menu-links { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu-links a { padding: 14px 18px; border-radius: 12px; color: var(--heading-color); font-weight: 500; font-size: 16px; border: 1px solid transparent; }
.mobile-menu-links a:hover { background: #F5F7FF; color: var(--primary); border-color: #e4e9fb; }
.mobile-menu-links a.active { background: var(--soft-block); color: var(--primary); font-weight: 700; }

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  padding: 13px 26px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.btn:active { transform: translateY(2px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(61,91,245,0.22); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 28px rgba(61,91,245,0.28); }
.btn-outline { background: #fff; border-color: rgba(61,91,245,.55); color: var(--primary); }
.btn-outline:hover { background: #F2F5FF; color: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 8px 24px rgba(249,115,98,0.26); }
.btn-accent:hover { background: #f05a4e; color: #fff; transform: translateY(-2px); box-shadow: 0 12px 30px rgba(249,115,98,0.32); }
.btn-white { background: #fff; color: var(--primary); border-color: #fff; }
.btn-white:hover { background: #f5f7ff; color: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* chips */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: 999px;
  background: #F0F3FF;
  color: var(--primary);
  font-size: 14px;
  font-weight: 500;
  border: 1px solid rgba(61,91,245,.12);
}
.hero-badge {
  display: inline-flex;
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
  padding: 7px 16px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}

/* breadcrumb */
.breadcrumb-bar {
  border-bottom: 1px solid #E9EEF6;
  background: rgba(255,255,255,.5);
  padding: 10px 0;
  font-size: 14px;
  color: var(--muted-color);
}
.breadcrumb-bar a { color: var(--muted-color); }
.breadcrumb-bar a:hover { color: var(--primary); }
.breadcrumb-bar .separator { margin: 0 8px; color: #b3bed0; }
.breadcrumb-bar .current { color: var(--heading-color); font-weight: 500; }

/* hero */
.category-hero {
  padding: 70px 0 64px;
  overflow: hidden;
  position: relative;
  background:
    radial-gradient(circle at 12% 12%, rgba(61,91,245,0.08), transparent 260px),
    radial-gradient(circle at 88% 20%, rgba(6,182,160,0.06), transparent 180px),
    #FFFFFF;
}
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero-title {
  font-size: 46px;
  line-height: 1.24;
  font-weight: 800;
  color: var(--heading-color);
  letter-spacing: -0.02em;
}
.hero-subtitle { font-size: 16px; color: var(--subtext-color); line-height: 1.9; margin-top: 22px; max-width: 540px; }
.hero-btns { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero-service-badges { display: flex; flex-wrap: wrap; gap: 12px 18px; margin-top: 36px; }
.hero-service-badges span { color: var(--muted-color); font-size: 14px; display: inline-flex; align-items: center; gap: 7px; }
.hero-visual { display: flex; justify-content: flex-end; position: relative; }
.browser-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid #E4EAF2;
  box-shadow: var(--shadow-md);
  overflow: hidden;
  width: 100%;
  max-width: 520px;
}
.browser-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid #EDF1F7;
}
.browser-bar i { width: 10px; height: 10px; border-radius: 50%; background: #DDE4EE; display: inline-block; }
.browser-bar i:nth-child(1) { background: #F9716D; }
.browser-bar i:nth-child(2) { background: #F6C24A; }
.browser-bar i:nth-child(3) { background: #54C98A; }
.browser-url {
  flex: 1;
  margin-left: 10px;
  padding: 4px 14px;
  background: #F2F5FA;
  border-radius: 999px;
  color: #8190A7;
  font-size: 13px;
  border: none;
}
.browser-media { position: relative; }
.browser-media img { width: 100%; height: 300px; object-fit: cover; }
.float-info {
  position: absolute;
  right: 16px;
  bottom: 18px;
  background: rgba(255,255,255,.95);
  border: 1px solid #E6EDF6;
  border-radius: 14px;
  padding: 14px 18px;
  box-shadow: var(--shadow-md);
  width: 190px;
}
.float-info .label { font-size: 12px; color: var(--muted-color); }
.float-info .value { font-weight: 700; color: var(--heading-color); display: flex; align-items: center; gap: 7px; }
.float-info .status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--secondary); box-shadow: 0 0 0 3px rgba(6,182,160,.18); }

/* section helpers */
.block-section { padding: 76px 0 64px; position: relative; }
.block-section.light-block { background: #F1F5FA; }
.section-heading { margin-bottom: 44px; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  background: #F0F3FF;
  padding: 5px 14px;
  border-radius: 999px;
  letter-spacing: .04em;
}
.section-title { font-size: 32px; font-weight: 800; color: var(--heading-color); line-height: 1.35; margin-top: 10px; }
.section-desc { margin-top: 16px; color: var(--subtext-color); font-size: 16px; max-width: 640px; line-height: 1.9; }

/* features split */
.feature-split-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 24px;
  align-items: stretch;
}
.feature-lead {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  min-height: 390px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: flex-end;
  background: #dbe6ff;
}
.feature-lead img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.feature-lead-tint { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(15,28,66,0.05) 0%, rgba(15,28,66,.74) 82%); }
.feature-lead-content { position: relative; z-index: 2; padding: 30px; color: #fff; max-width: 540px; }
.feature-lead-content .kicker { color: #C6D2FF; font-size: 13px; letter-spacing:.06em; display: flex; align-items: center; gap: 4px; }
.feature-lead-content h3 { font-size: 26px; font-weight: 700; margin: 8px 0 12px; line-height:1.3; }
.feature-lead-content p { color: #F3F6FF; font-size: 15px; opacity: .94; line-height: 1.85; }
.card-soft-link { margin-top: 14px; color: #fff; display:inline-flex; align-items:center; gap:6px; font-weight:600; font-size:15px; border-bottom:1px solid rgba(255,255,255,.4); padding-bottom:2px; }
.card-soft-link:hover { color:#fff; border-color:#fff; }
.feature-mini-grid { display: grid; grid-template-rows: 1fr 1fr; gap: 22px; }
.mini-card {
  background: #fff;
  border: 1px solid #E7EDF4;
  border-radius: 16px;
  padding: 26px;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.mini-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(61,91,245,.25); }
.mini-icon { width: 46px; height: 46px; border-radius: 12px; background: #EFF3FF; color: var(--primary); display: inline-flex; align-items: center; justify-content: center; font-size: 20px; }
.mini-card h3 { font-size: 18px; margin: 16px 0 8px; font-weight:700; color: var(--heading-color); }
.mini-card p { font-size: 14px; color: var(--subtext-color); line-height: 1.8; }

/* steps */
.steps-section { background: #EAEFFB; padding: 78px 0 66px; }
.steps-note { color: var(--muted-color); margin-top: 28px; font-size: 14px; text-align: center; }
.steps-note i { color: var(--secondary); }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; position: relative; }
.step-card {
  background: #fff;
  border: 1px solid #E7EDF4;
  border-radius: 16px;
  padding: 28px 22px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}
.step-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 17px;
  box-shadow: 0 6px 14px rgba(61,91,245,.24);
}
.step-title { margin: 20px 0 10px; font-size: 18px; font-weight:700; color: var(--heading-color); }
.step-card p { font-size: 14px; color: var(--subtext-color); line-height: 1.8; }
.step-arrow { position:absolute; top:32%; right:-17px; color:#b7c5e8; font-size:18px; z-index:2; }
.timeline-stamp { text-align:center; margin-top:42px; }
.timeline-stamp span { background: rgba(255,255,255,.7); border:1px solid #DCE5F5; padding: 10px 22px; border-radius:999px; color: var(--subtext-color); font-size:15px; }

/* card themes */
.tool-scroller { display: flex; gap: 20px; overflow-x: auto; padding-bottom: 18px; scrollbar-color: #b9c7e4 transparent; scrollbar-width: thin; }
.tool-scroller::-webkit-scrollbar { height: 8px; }
.tool-scroller::-webkit-scrollbar-track { background: #e9eef7; border-radius: 999px; }
.tool-scroller::-webkit-scrollbar-thumb { background: #b9c7e4; border-radius: 999px; }
.theme-card { min-width: 270px; max-width: 270px; background:#fff; border: 1px solid #E4EAF2; border-radius: 18px; overflow:hidden; box-shadow: var(--shadow-sm); transition:.2s ease; }
.theme-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.theme-media { position:relative; height: 170px; overflow: hidden; }
.theme-media img { width: 100%; height: 100%; object-fit: cover; }
.theme-tag { position:absolute; left:12px; top:12px; background: rgba(20,34,60,.86); color:white; font-size: 12px; padding:4px 12px; border-radius:999px; backdrop-filter: blur(2px); }
.theme-content { padding: 22px; }
.theme-content h3 { font-size:18px; color:var(--heading-color); font-weight:700; margin-bottom: 10px; }
.theme-content p { font-size:14px; color: var(--subtext-color); line-height:1.8; }
.theme-more { margin-top:16px; display:inline-flex; align-items:center; gap:6px; font-size:14px; font-weight:600; color: var(--primary); }

/* faq */
.faq-bg { background:#eef2f9; }
.faq-list { max-width: 920px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 22px 26px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item:hover { border-color: rgba(61,91,245,.32); box-shadow: var(--shadow-sm); }
.faq-item.open { border-color: rgba(61,91,245,.5); box-shadow: var(--shadow-sm); border-left: 3px solid var(--primary); }
.faq-question {
  border: 0;
  background: transparent;
  width:100%;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:20px;
  font-size: 16px;
  color: var(--heading-color);
  font-weight: 600;
  padding: 0;
  text-align:left;
}
.faq-question .faq-icon {
  color: var(--primary);
  transition: transform .3s ease;
}
.faq-item.open .faq-question .faq-icon { transform: rotate(45deg); }
.faq-body { max-height:0; opacity:0; overflow:hidden; transition: max-height .35s ease, opacity .3s ease, margin .3s ease; }
.faq-item.open .faq-body { max-height: 400px; opacity:1; margin-top:14px; }
.faq-body p { color: var(--subtext-color); font-size:15px; line-height:1.9; padding-right:20px; }

/* cta */
.cta-section { padding: 80px 0; }
.cta-box {
  background: #fff;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 14px 44px rgba(20,40,90,.1);
  border: 1px solid #E0E7F0;
  background:
    radial-gradient(circle at 100% 0%, rgba(61,91,245,0.1), transparent 300px),
    #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 44px 46px;
}
.cta-box h3 { font-size: 27px; font-weight: 800; color: var(--heading-color); line-height: 1.4; }
.cta-box p { margin-top:10px; color: var(--subtext-color); font-size:15px; }
.cta-actions { flex-shrink:0; display:flex; gap:14px; flex-wrap:wrap; }

/* footer */
.site-footer { background:#F1F4F9; padding:64px 0 30px; margin-top:16px; }
.footer-grid { display:grid; grid-template-columns: 1.7fr .8fr .8fr 1fr; gap:40px; }
.footer-grid h4 { font-size:15px; }
.footer-link-list { display:flex; flex-direction:column; gap: 6px; }
.footer-link-list a { color: #60708C; font-size:14px; }
.footer-link-list a:hover { color: var(--primary); }
.bottom-copyright { border-top:1px solid #DDE4EE; margin-top: 44px; padding-top: 22px; display:flex; justify-content:space-between; align-items:center; gap:16px; color:#8190A7; font-size: 13px; flex-wrap:wrap; }
.bottom-copyright a { color:#8190A7; }
.bottom-copyright a:hover { color: var(--primary); }

@media (max-width: 1023px) {
  .header-row { height: 64px; display: flex; }
  .logo-center { position:absolute; left:50%; transform: translateX(-50%); }
  .brand-text { font-size: 20px; }
  .desktop-nav-wrapper { display: none; }
  .mobile-toggle { display: inline-flex; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { justify-content: center; }
  .hero-title { font-size: 38px; }
  .feature-split-grid { grid-template-columns: 1fr; }
  .feature-mini-grid { grid-template-columns: 1fr 1fr; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-box { flex-direction: column; align-items: flex-start; padding: 32px; }
}

@media (max-width: 767px) {
  .container-custom { padding-left: 18px; padding-right: 18px; }
  .brand-text { font-size: 18px; }
  .brand-text i { font-size: 16px; }
  .category-hero { padding: 48px 0 40px; }
  .hero-title { font-size: 30px; line-height:1.4; }
  .hero-badge { font-size: 12px; }
  .hero-subtitle { font-size: 15px; }
  .hero-btns .btn { width: 100%; }
  .btn { padding: 12px 20px; }
  .float-info { width: 160px; right:10px; bottom:10px; }
  .block-section { padding: 58px 0 48px; }
  .section-title { font-size: 25px; }
  .feature-lead { min-height: 350px; }
  .feature-mini-grid { grid-template-columns: 1fr; }
  .feature-lead-content h3 { font-size: 22px; }
  .steps-grid { grid-template-columns: 1fr; }
  .timeline-stamp { margin-top: 20px; }
  .theme-card { min-width: 240px; max-width: 240px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .bottom-copyright { justify-content:center; text-align:center; }
  .cta-box { padding: 28px 24px; }
  .cta-actions .btn { width: 100%; }
}

@media (max-width: 520px) {
  .brand-text { font-size: 16px; }
  .mobile-toggle { width: 38px; height: 38px; }
  .browser-url { display: none; }
  .hero-service-badges { gap: 8px; }
}

/* roulang page: category3 */
:root {
            --primary: #3D5BF5;
            --primary-hover: #2A3FD6;
            --accent-green: #06B6A0;
            --orange-accent: #F97362;
            --ink-main: #14223C;
            --ink-soft: #43536B;
            --ink-muted: #64748B;
            --bg-page: #F6F8FC;
            --bg-card: #FFFFFF;
            --bg-soft: #EAF0FA;
            --border-hairline: #D9E1EC;
            --border-card: #E7EDF4;
            --radius-btn: 8px;
            --radius-card: 16px;
            --shadow-card: 0 6px 20px rgba(20, 40, 90, 0.06);
            --shadow-lift: 0 12px 32px rgba(20, 40, 90, 0.12);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            background-color: var(--bg-page);
            color: var(--ink-main);
            font-size: 16px;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-card);
            min-height: 72px;
            transition: box-shadow 0.3s;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(20, 40, 90, 0.08);
        }

        .header-row {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            height: 72px;
        }

        .logo-center {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            white-space: nowrap;
            z-index: 2;
        }

        .brand-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--ink-main);
            display: inline-flex;
            align-items: center;
            letter-spacing: 0.01em;
        }

        .brand-text span {
            color: var(--primary);
            margin-left: 2px;
        }

        .nav-side {
            display: flex;
            align-items: center;
        }

        .nav-side.left {
            position: absolute;
            left: 20px;
        }

        .nav-side.right {
            position: absolute;
            right: 20px;
        }

        .desktop-nav-wrapper {
            display: flex;
        }

        .nav-links {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link-item {
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 8px 14px;
            border-radius: 8px;
            position: relative;
            transition: color 0.2s, background 0.2s;
        }

        .nav-link-item:hover {
            color: var(--primary);
            background: rgba(61, 91, 245, 0.08);
        }

        .nav-link-item.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link-item.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--primary);
        }

        .nav-cta-link {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: var(--orange-accent);
            padding: 8px 18px;
            border-radius: var(--radius-btn);
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .nav-cta-link:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 18px rgba(249, 115, 98, 0.28);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--ink-main);
            cursor: pointer;
            padding: 8px;
            position: absolute;
            left: 8px;
            top: 18px;
            z-index: 30;
        }

        .mobile-menu {
            display: none;
            background: #fff;
            position: absolute;
            top: 72px;
            left: 0;
            right: 0;
            border-bottom: 1px solid var(--border-card);
            box-shadow: 0 20px 30px rgba(20, 40, 90, 0.1);
            padding: 18px 24px 20px;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu-links {
            list-style: none;
        }

        .mobile-menu-links li a {
            display: block;
            padding: 12px 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--ink-soft);
            border-radius: 10px;
            border-bottom: 1px solid #f1f5f9;
        }

        .mobile-menu-links li a.active {
            color: var(--primary);
            background: #EEF2FF;
            padding-left: 14px;
        }
        .header-mobile-row {
            display: none;
        }
        @media (max-width: 1023px) {
            .desktop-nav-wrapper {
                display: none;
            }
            .site-header {
                min-height: 60px;
            }
            .header-row {
                height: 60px;
            }
            .mobile-toggle {
                display: block;
                position: absolute;
                top: 12px;
            }
            .header-mobile-row {
                display: block;
                padding-left: 0;
                padding-right: 0;
            }
            .logo-center {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
            }
            .brand-text {
                font-size: 19px;
            }
            .nav-side.left,
            .nav-side.right {
                display: none;
            }
        }

        .site-footer {
            background: #F1F4F9;
            padding: 70px 0 0;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 0.8fr 0.8fr 1.1fr;
            gap: 50px;
            padding-bottom: 44px;
        }

        .footer-link-list {
            list-style: none;
        }

        .footer-link-list li {
            margin-bottom: 12px;
        }

        .footer-link-list li a {
            font-size: 15px;
            color: var(--ink-soft);
            transition: color 0.2s;
        }

        .footer-link-list li a:hover {
            color: var(--primary);
        }

        .bottom-copyright {
            border-top: 1px solid #E1E7F0;
            padding: 22px 0 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--ink-muted);
        }

        .bottom-copyright a {
            color: var(--ink-muted);
            margin-left: 22px;
            transition: color 0.2s;
        }

        .bottom-copyright a:hover {
            color: var(--primary);
        }

        @media (max-width: 768px) {
            .container-custom {
                padding-left: 18px;
                padding-right: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .bottom-copyright {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 26px;
            }
            .brand-text {
                font-size: 17px;
            }
        }

        .content-page-wrap {
            padding-top: 140px;
        }

        @media (max-width: 1023px) {
            .content-page-wrap {
                padding-top: 100px;
            }
        }

        .section-block {
            padding: 100px 0;
        }

        @media (max-width: 768px) {
            .section-block {
                padding: 60px 0;
            }
        }

        .hero-cat-page {
            background-color: #F6F8FC;
            background-image: radial-gradient(circle at 85% 15%, rgba(61, 91, 245, 0.10), transparent 32%), radial-gradient(circle at 15% 90%, rgba(6, 182, 160, 0.05), transparent 30%);
            padding: 30px 0 0;
            position: relative;
            overflow: hidden;
        }

        .crumb-line {
            font-size: 14px;
            color: var(--ink-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 22px;
        }

        .crumb-line a {
            color: var(--ink-muted);
            transition: color 0.2s;
        }

        .crumb-line a:hover {
            color: var(--primary);
        }

        .crumb-line i.fa-chevron-right {
            font-size: 10px;
            color: #9AA8BC;
        }

        .hero-inner-grid {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 50px;
            align-items: center;
            padding-bottom: 70px;
        }

        .hero-flag {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: #EEF2FF;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            padding: 7px 16px;
            border-radius: 30px;
            margin-bottom: 20px;
        }

        .hero-title-cat {
            font-size: 40px;
            line-height: 1.22;
            font-weight: 700;
            color: var(--ink-main);
            letter-spacing: -0.01em;
        }

        .hero-title-cat .highlight {
            color: var(--primary);
            position: relative;
        }

        .hero-desc-cat {
            margin-top: 20px;
            font-size: 17px;
            line-height: 1.9;
            color: var(--ink-soft);
            max-width: 520px;
        }

        .hero-actions-cat {
            display: flex;
            gap: 20px;
            margin-top: 32px;
            align-items: center;
            flex-wrap: wrap;
        }

        .btn-primary-cat {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--orange-accent);
            color: #fff;
            padding: 15px 34px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 16px;
            box-shadow: 0 8px 24px rgba(249, 115, 98, 0.25);
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .btn-primary-cat:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 30px rgba(249, 115, 98, 0.30);
        }

        .btn-outline-cat {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: all 0.2s;
        }

        .btn-outline-cat:hover {
            background: rgba(61, 91, 245, 0.06);
            transform: translateY(-2px);
        }

        .hero-img-box {
            position: relative;
        }

        .hero-decor-card {
            background: #fff;
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .hero-decor-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lift);
        }

        .hero-decor-top {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 13px 18px;
            border-bottom: 1px solid #eef2f7;
            background: #fcfdff;
        }

        .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
        }

        .dot-red {
            background: #ff5f57;
        }
        .dot-yellow {
            background: #febc2e;
        }
        .dot-green {
            background: #28c840;
        }

        .hero-decor-body {
            padding: 25px;
        }

        .mini-status-row {
            text-align: center;
            padding: 10px 0 20px;
        }

        .stat-welcome-title {
            font-weight: 700;
            font-size: 17px;
        }

        .stat-gift-line {
            display: flex;
            gap: 10px;
            margin-top: 17px;
        }

        .stat-cell {
            flex: 1;
            background: #F6F8FC;
            border-radius: 12px;
            padding: 14px 8px;
            text-align: center;
            border: 1px solid #edf1f8;
        }

        .stat-num {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
        }
        .stat-num-green {
            color: var(--accent-green);
        }
        .stat-num-orange {
            color: var(--orange-accent);
        }
        .stat-label {
            font-size: 11px;
            color: var(--ink-muted);
            margin-top: 4px;
        }

        .mid-tip {
            background: #EEF2FF;
            border-radius: 12px;
            padding: 13px 18px;
            font-size: 14px;
            color: #3b4f7c;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 14px;
        }

        .no-margin-bottom {
            padding-bottom: 50px;
        }

        @media (max-width: 1024px) {
            .hero-inner-grid {
                grid-template-columns: 1fr;
                padding-bottom: 56px;
            }
            .hero-title-cat {
                font-size: 33px;
            }
            .hero-desc-cat {
                font-size: 16px;
            }
        }

        .center-title-wrap {
            text-align: center;
            margin-bottom: 55px;
        }

        .center-title-wrap h2 {
            font-size: 31px;
            font-weight: 700;
            letter-spacing: 0;
        }

        .center-title-wrap p {
            margin-top: 16px;
            max-width: 660px;
            margin-left: auto;
            margin-right: auto;
            color: var(--ink-soft);
            font-size: 16px;
            line-height: 1.9;
        }

        .widget-pill {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            background: #EEF2FF;
            color: var(--primary);
            margin-bottom: 18px;
        }

        .perks-horizontal {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .perk-card {
            background: #fff;
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            padding: 30px 26px;
            box-shadow: var(--shadow-card);
            transition: transform 0.25s, box-shadow 0.25s;
            position: relative;
            overflow: hidden;
        }

        .perk-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            border-radius: 0 4px 4px 0;
            opacity: 0;
            transition: opacity 0.2s;
        }

        .perk-card:nth-child(1)::before {
            background: var(--primary);
        }
        .perk-card:nth-child(2)::before {
            background: var(--accent-green);
        }
        .perk-card:nth-child(3)::before {
            background: var(--orange-accent);
        }

        .perk-card:hover::before {
            opacity: 1;
        }

        .perk-card:hover {
            transform: translateY(-7px);
            box-shadow: var(--shadow-lift);
        }

        .perk-icon-round {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 18px;
            background: #EEF2FF;
            color: var(--primary);
        }

        .perk-card:nth-child(2) .perk-icon-round {
            background: #EBFBF8;
            color: var(--accent-green);
        }
        .perk-card:nth-child(3) .perk-icon-round {
            background: #FFF1ED;
            color: var(--orange-accent);
        }

        .perk-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .perk-card p {
            color: var(--ink-soft);
            font-size: 15px;
            line-height: 1.85;
        }

        .timeline-gift {
            background: #fff;
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            max-width: 960px;
            margin: 0 auto;
        }

        .timeline-header {
            display: flex;
            border-bottom: 1px solid var(--border-card);
            background: #fbfcff;
            padding: 20px 32px;
            align-items: center;
            gap: 16px;
        }

        .timeline-header h3 {
            font-size: 18px;
            font-weight: 700;
        }

        .timeline-header p {
            color: var(--muted);
            font-size: 14px;
            margin-left: auto;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .time-gift-row {
            display: grid;
            grid-template-columns: 130px 1fr 130px;
            align-items: center;
            padding: 25px 32px;
            border-bottom: 1px solid #f0f4fa;
            position: relative;
        }

        .time-gift-row:last-of-type {
            border-bottom: none;
        }

        .time-badge {
            font-weight: 700;
            color: var(--primary);
            background: #EEF2FF;
            font-size: 14px;
            border-radius: 8px;
            padding: 8px 12px;
            text-align: center;
            display: inline-block;
        }

        .time-badge.green {
            background: #E4F8F5;
            color: #0d9488;
        }

        .time-badge.orange {
            background: #FFF1ED;
            color: #d05a4f;
        }

        .gift-desc {
            font-size: 15px;
            color: var(--ink-soft);
            line-height: 1.75;
        }

        .gift-desc strong {
            color: var(--ink-main);
        }

        .gift-action {
            text-align: right;
        }

        .gift-action a {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            border: 1px solid #cbd8fb;
            padding: 7px 18px;
            border-radius: 20px;
            background: #fff;
            transition: 0.2s;
        }

        .gift-action a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        @media (max-width: 768px) {
            .time-gift-row {
                grid-template-columns: 1fr;
                gap: 14px;
                padding: 20px;
            }
            .time-badge {
                justify-self: start;
            }
            .gift-action {
                text-align: left;
            }
        }

        .step-zone {
            background: linear-gradient(rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.5)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            border-radius: 20px;
            padding: 65px 45px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 36px;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-card);
        }

        .step-item {
            text-align: center;
            position: relative;
        }

        .step-item:not(:last-child)::after {
            content: '\f105';
            font-family: 'Font Awesome 6 Free';
            font-weight: 600;
            position: absolute;
            top: 15%;
            right: -24px;
            font-size: 18px;
            color: #b6c4e0;
        }

        .step-circle {
            width: 72px;
            height: 72px;
            background: #fff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary);
            border: 2px solid #dbe4fb;
            margin-bottom: 22px;
            box-shadow: 0 6px 16px rgba(20, 40, 90, 0.08);
        }

        .step-item .step-label {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--ink-soft);
            line-height: 1.85;
            max-width: 200px;
            margin: 0 auto;
        }

        @media (max-width: 1024px) {
            .step-zone {
                grid-template-columns: 1fr 1fr;
                gap: 26px;
            }
            .step-item:not(:last-child)::after {
                display: none;
            }
        }

        @media (max-width: 540px) {
            .step-zone {
                grid-template-columns: 1fr;
            }
        }

        .bg-soft-band {
            background: #EAF0FA;
        }

        .double-card-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 26px;
        }

        .flag-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .flag-card-cover {
            height: 150px;
            object-fit: cover;
            width: 100%;
        }

        .flag-card-body {
            padding: 26px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }

        .flag-badge {
            background: #EEF2FF;
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 18px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .flag-badge.green {
            background: #E4F8F5;
            color: #0d9488;
        }

        .flag-badge.warm {
            background: #FFF1ED;
            color: #d05a4f;
        }

        .flag-badge.purple {
            background: #f0ebfe;
            color: #7a5af5;
        }

        .flag-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .flag-card-body p {
            font-size: 14px;
            color: var(--ink-soft);
            line-height: 1.75;
        }

        .flag-card-footer {
            padding: 0 26px 24px;
            margin-top: auto;
        }

        .flag-note {
            font-size: 13px;
            color: var(--ink-muted);
            border-top: 1px dashed var(--border-card);
            padding-top: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        @media (max-width: 768px) {
            .double-card-grid {
                grid-template-columns: 1fr;
            }
            .flag-card-body {
                flex-direction: column;
            }
        }

        .faq-mini-list {
            max-width: 880px;
            margin: 0 auto;
        }

        .faq-single {
            background: #fff;
            border: 1px solid var(--border-card);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow 0.2s;
        }

        .faq-single:hover {
            box-shadow: var(--shadow-card);
        }

        .faq-q {
            padding: 21px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink-main);
        }

        .faq-q i {
            color: var(--primary);
            transition: transform 0.3s;
            font-size: 15px;
        }

        .faq-q.open i {
            transform: rotate(45deg);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-a.open {
            max-height: 280px;
        }

        .faq-a-inner {
            padding: 0 28px 22px;
            color: var(--ink-soft);
            font-size: 15px;
            line-height: 1.9;
            border-left: 3px solid var(--primary);
            margin-left: 28px;
        }

        .cta-zone-simple {
            background: #EEF2FF;
            border-radius: 24px;
            padding: 70px 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-zone-simple::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(61, 91, 245, 0.07);
            top: -140px;
            left: -90px;
        }

        .cta-zone-simple h2 {
            font-size: 32px;
            font-weight: 700;
            position: relative;
        }

        .cta-zone-simple p {
            font-size: 16px;
            color: var(--ink-soft);
            line-height: 1.8;
            margin: 18px auto 0;
            max-width: 560px;
            position: relative;
        }

        .cta-buttons-zone {
            margin-top: 32px;
            position: relative;
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-orange-cat {
            background: var(--orange-accent);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            padding: 15px 38px;
            border-radius: var(--radius-btn);
            transition: 0.2s;
        }

        .btn-orange-cat:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 25px rgba(249, 115, 98, 0.3);
        }

        .btn-white-border {
            background: #fff;
            border: 1.5px solid #cbd8fb;
            color: var(--primary);
            font-weight: 600;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            transition: 0.2s;
        }

        .btn-white-border:hover {
            border-color: var(--primary);
            background: #f6f8ff;
        }

        .bottom-bar-spacer {
            height: 40px;
        }

        .banner-ft-spacer {
            height: 30px;
        }

        .footer-fixed-space {
            height: 0;
        }

        .info-banner-benefit {
            padding: 70px 0 0;
            background: linear-gradient(180deg, #eef2ff 0%, #F6F8FC 40%);
        }

        @media (max-width: 640px) {
            .hero-title-cat {
                font-size: 27px;
            }
            .hero-desc-cat {
                font-size: 15px;
            }
            .section-block {
                padding: 50px 0;
            }
            .center-title-wrap h2 {
                font-size: 25px;
            }
            .timeline-header p {
                display: none;
            }
            .step-zone {
                padding: 35px 20px;
            }
            .cta-zone-simple {
                padding: 44px 20px;
            }
            .cta-zone-simple h2 {
                font-size: 22px;
            }
        }

        @media (max-width: 380px) {
            .brand-text {
                font-size: 16px;
            }
            .hero-actions-cat {
                gap: 12px;
            }
            .btn-primary-cat,
            .btn-outline-cat {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category2 */
:root {
        --primary: #3D5BF5;
        --primary-deep: #2A3FD6;
        --accent: #06B6A0;
        --hot: #F97362;
        --ink: #14223C;
        --ink-soft: #43536B;
        --ink-muted: #64748B;
        --line: #D9E1EC;
        --line-mist: #E7EDF4;
        --bg-body: #F6F8FC;
        --bg-soft: #EAF0FA;
        --card: #FFFFFF;
        --radius-md: 12px;
        --radius-lg: 16px;
        --shadow-card: 0 6px 20px rgba(20, 40, 90, 0.06);
        --shadow-lift: 0 12px 32px rgba(20, 40, 90, 0.12);
    }
    * {
        box-sizing: border-box;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        margin: 0;
        font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        background: var(--bg-body);
        color: var(--ink);
        line-height: 1.8;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
    }
    body.menu-open {
        overflow: hidden;
    }

    a {
        color: var(--primary);
        text-decoration: none;
        transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    a:hover {
        color: var(--primary-deep);
    }
    a:focus-visible,
    button:focus-visible {
        outline: 3px solid rgba(61, 91, 245, .35);
        outline-offset: 2px;
        border-radius: 8px;
    }
    img {
        max-width: 100%;
        display: block;
        object-fit: cover;
    }
    ul,
    ol {
        margin: 0;
        padding: 0;
        list-style: none;
    }
    button {
        font-family: inherit;
        cursor: pointer;
    }
    .container-custom {
        max-width: 1160px;
        width: 100%;
        margin: 0 auto;
        padding: 0 28px;
    }

    /* ===== Header ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        height: 72px;
        background: rgba(255, 255, 255, .88);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--line-mist);
        transition: box-shadow .25s ease, background .25s ease;
    }
    .site-header.scrolled {
        box-shadow: 0 8px 24px rgba(20, 40, 90, .06);
        background: rgba(255, 255, 255, .96);
    }
    .header-mobile-row {
        height: 72px;
    }
    .header-row {
        display: flex;
        align-items: center;
        justify-content: space-between;
        min-height: 72px;
        position: relative;
        gap: 20px;
    }
    .logo-center {
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        top: 50%;
        transform-style: preserve-3d;
        white-space: nowrap;
        transform: translate(-50%, -50%);
    }
    .brand-text {
        display: inline-flex;
        align-items: center;
        font-size: 22px;
        font-weight: 800;
        color: var(--ink);
        letter-spacing: .2px;
        white-space: nowrap;
        line-height: 1.3;
    }
    .brand-text span {
        color: var(--primary);
        font-weight: 600;
        margin-left: 1px;
    }
    .brand-text svg,
    .brand-text i {
        margin-right: 7px;
        font-size: 18px;
        color: var(--primary);
    }
    .desktop-nav-wrapper {
        flex: 1;
    }
    .desktop-nav-wrapper.left {
        display: flex;
        justify-content: flex-start;
    }
    .desktop-nav-wrapper.right {
        display: flex;
        justify-content: flex-end;
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 2px;
    }
    .nav-links a {
        display: inline-block;
        padding: .5rem .9rem;
        border-radius: 9px;
        font-size: 15px;
        font-weight: 600;
        color: var(--ink-soft);
        line-height: 1.4;
        position: relative;
    }
    .nav-links a:hover {
        color: var(--primary);
        background: rgba(61, 91, 245, .06);
    }
    .nav-links a.active {
        color: var(--primary);
    }
    .nav-links a.active::after {
        content: "";
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        bottom: -4px;
        width: 18px;
        height: 4px;
        border-radius: 4px;
        background: var(--primary);
    }
    .nav-links a.nav-link-item i {
        font-size: 13px;
        margin-right: 5px;
        opacity: .75;
    }
    .nav-links a.nav-cta-link {
        margin-left: 8px;
        padding: .48rem 1.15rem;
        border: 1px solid rgba(61, 91, 245, .35);
        color: var(--primary);
        border-radius: 40px;
        background: #fff;
        box-shadow: 0 2px 8px rgba(61, 91, 245, .06);
    }
    .nav-links a.nav-cta-link:hover {
        color: #fff;
        background: var(--primary);
        border-color: var(--primary);
    }

    .mobile-toggle {
        display: none;
        width: 42px;
        height: 42px;
        align-items: center;
        justify-content: center;
        background: #fff;
        border: 1px solid var(--line-mist);
        border-radius: 10px;
        color: var(--ink);
        font-size: 18px;
        flex-shrink: 0;
        transition: all .2s;
    }
    .mobile-toggle:hover {
        color: var(--primary);
        border-color: var(--primary);
        background: rgba(61, 91, 245, .04);
    }

    .mobile-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: #fff;
        border-bottom: 1px solid var(--line-mist);
        box-shadow: 0 16px 34px rgba(20, 40, 90, .1);
        padding: 8px 24px 16px;
        display: none;
        max-height: calc(100vh - 80px);
        overflow-y: auto;
        z-index: 99;
        transform: translateY(-12px);
        opacity: 0;
        transition: all .25s ease;
        pointer-events: none;
    }
    .mobile-menu.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .mobile-menu-links li {
        border-bottom: 1px solid #eEF2F7;
    }
    .mobile-menu-links a {
        display: block;
        padding: 13px 8px;
        font-size: 16px;
        font-weight: 600;
        color: var(--ink-soft);
        border-radius: 8px;
    }
    .mobile-menu-links a:hover,
    .mobile-menu-links a.active {
        color: var(--primary);
        background: rgba(61, 91, 245, .04);
    }

    /* ===== Buttons ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 9px;
        padding: 13px 25px;
        font-size: 15px;
        font-weight: 700;
        border-radius: 9px;
        transition: all .2s ease;
        border: 2px solid transparent;
        line-height: 1.4;
        min-height: 48px;
    }
    .btn-primary {
        background: var(--primary);
        color: #fff !important;
        box-shadow: 0 8px 22px rgba(61, 91, 245, .25);
    }
    .btn-primary:hover {
        background: var(--primary-deep);
        transform: translateY(-2px);
        box-shadow: 0 12px 26px rgba(42, 63, 214, .25);
    }
    .btn-primary:active {
        transform: translateY(2px);
        box-shadow: 0 4px 10px rgba(61, 91, 245, .18);
    }
    .btn-accent {
        background: var(--hot);
        color: #fff !important;
        box-shadow: 0 8px 20px rgba(249, 115, 98, .25);
    }
    .btn-accent:hover {
        background: #E85C4C;
        transform: translateY(-2px);
        box-shadow: 0 12px 28px rgba(249, 115, 98, .3);
    }
    .btn-accent:active {
        transform: translateY(2px);
    }
    .btn-outline {
        background: #fff;
        border: 1.5px solid rgba(61, 91, 245, .35);
        color: var(--primary) !important;
        box-shadow: 0 2px 8px rgba(20, 40, 90, .04);
    }
    .btn-outline:hover {
        border-color: var(--primary);
        background: #f4f7ff;
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(61, 91, 245, .1);
    }
    .btn-outline:active {
        transform: translateY(2px);
    }
    .btn-lg {
        padding: 17px 36px;
        font-size: 17px;
        border-radius: 11px;
    }
    .btn-sm {
        min-height: 40px;
        padding: 9px 18px;
        font-size: 14px;
    }

    /* ===== Hero ===== */
    .category-hero {
        position: relative;
        overflow: hidden;
        padding: 58px 0 68px;
        background:
            radial-gradient(circle at 85% 15%, rgba(61, 91, 245, .08), transparent 26%),
            radial-gradient(circle at 10% 80%, rgba(6, 182, 160, .07), transparent 26%),
            #fff;
    }
    .category-hero::after {
        content: "";
        position: absolute;
        right: -180px;
        top: -180px;
        width: 420px;
        height: 420px;
        border-radius: 50%;
        border: 1px solid rgba(61, 91, 245, .08);
        pointer-events: none;
    }
    .hero-grid {
        display: grid;
        grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
        gap: 50px;
        align-items: center;
    }
    .hero-content {
        position: relative;
        z-index: 2;
    }
    .breadcrumb-line {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: var(--ink-muted);
        background: #fff;
        border: 1px solid var(--line-mist);
        border-radius: 40px;
        padding: 6px 15px;
        margin-bottom: 18px;
        box-shadow: 0 2px 10px rgba(20, 40, 90, .03);
    }
    .breadcrumb-line i {
        color: var(--primary);
        font-size: 12px;
    }
    .category-kicker {
        display: inline-flex;
        align-items: center;
        gap: 7px;
        background: rgba(61, 91, 245, .08);
        color: var(--primary);
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 2px;
        padding: 6px 16px;
        border-radius: 40px;
        margin-bottom: 22px;
    }
    .category-kicker::before {
        content: "";
        width: 9px;
        height: 9px;
        background: var(--hot);
        border-radius: 50%;
        box-shadow: 0 0 0 4px rgba(249, 115, 98, .18);
    }
    .hero-title {
        font-size: clamp(34px, 4vw, 48px);
        line-height: 1.25;
        font-weight: 800;
        color: var(--ink);
        letter-spacing: -0.3px;
        margin: 0 0 22px;
    }
    .hero-title strong {
        color: var(--primary);
        font-weight: 800;
    }
    .hero-subtitle {
        font-size: 17px;
        line-height: 1.95;
        color: var(--ink-soft);
        max-width: 540px;
        margin-bottom: 30px;
    }
    .hero-btns {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
        margin-bottom: 28px;
    }
    .trust-lines {
        display: flex;
        flex-wrap: wrap;
        gap: 18px;
        padding-top: 6px;
    }
    .trust-lines li {
        display: inline-flex;
        align-items: center;
        gap: 7px;
        color: var(--ink-soft);
        font-size: 14px;
    }
    .trust-lines li i {
        color: var(--accent);
        font-size: 15px;
    }

    /* hero screen */
    .hero-visual {
        position: relative;
        z-index: 2;
    }
    .browser-window {
        background: #fff;
        border-radius: 18px;
        border: 1px solid #E6ECF4;
        box-shadow: 0 22px 50px rgba(20, 40, 90, .13);
        overflow: hidden;
    }
    .browser-bar {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 13px 16px;
        background: #F4F7FB;
        border-bottom: 1px solid #E8EDF4;
    }
    .browser-bar span {
        width: 9px;
        height: 9px;
        border-radius: 50%;
    }
    .browser-bar span:nth-child(1) {
        background: #FCA5A5;
    }
    .browser-bar span:nth-child(2) {
        background: #FCD34D;
    }
    .browser-bar span:nth-child(3) {
        background: #6EE7B7;
    }
    .browser-url {
        margin-left: 8px;
        flex: 1;
        font-size: 12px;
        color: var(--ink-muted);
        background: #fff;
        border: 1px solid #E6ECF4;
        border-radius: 30px;
        padding: 5px 14px;
        text-align: center;
        letter-spacing: .3px;
    }
    .browser-body {
        position: relative;
        min-height: 260px;
        background: #F8FAFE;
    }
    .browser-body > img {
        width: 100%;
        height: 290px;
        object-fit: cover;
        border-top: 1px solid #f2f5fa;
    }
    .float-note {
        position: absolute;
        right: 18px;
        bottom: 18px;
        left: 18px;
        background: rgba(255, 255, 255, .95);
        backdrop-filter: blur(8px);
        border: 1px solid rgba(255, 255, 255, .9);
        border-radius: 13px;
        padding: 14px 16px;
        box-shadow: 0 12px 28px rgba(20, 40, 90, .16);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .float-note .note-icon {
        width: 36px;
        height: 36px;
        background: rgba(6, 182, 160, .13);
        color: var(--accent);
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        flex-shrink: 0;
    }
    .float-note small {
        display: block;
        color: var(--ink-muted);
        font-size: 12px;
        line-height: 1.5;
    }
    .float-note strong {
        color: var(--ink);
        font-size: 14px;
    }

    /* ===== Common section ===== */
    .section {
        padding: 90px 0;
    }
    .section-sm {
        padding: 58px 0;
    }
    .section-soft {
        background: #F0F5FC;
    }
    .section-white {
        background: #fff;
    }
    .section-head {
        max-width: 720px;
        margin-bottom: 44px;
    }
    .section-head.center {
        margin-left: auto;
        margin-right: auto;
        text-align: center;
    }
    .section-top-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 700;
        color: var(--primary);
        background: rgba(61, 91, 245, .08);
        padding: 6px 16px;
        border-radius: 40px;
        letter-spacing: 1.5px;
        margin-bottom: 16px;
    }
    .section-title {
        font-size: clamp(26px, 3vw, 34px);
        line-height: 1.3;
        color: var(--ink);
        font-weight: 800;
        letter-spacing: -.3px;
        margin-bottom: 14px;
    }
    .section-desc {
        color: var(--ink-soft);
        font-size: 16px;
        line-height: 1.85;
    }
    .text-muted {
        color: var(--ink-muted);
    }

    /* Entrance type cards */
    .entry-grid {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 20px;
    }
    .entry-card {
        position: relative;
        background: #fff;
        border: 1px solid var(--line-mist);
        border-radius: var(--radius-lg);
        padding: 26px 22px;
        box-shadow: var(--shadow-card);
        transition: all .2s ease;
        overflow: hidden;
    }
    .entry-card:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-lift);
        border-color: rgba(61, 91, 245, .35);
    }
    .entry-card .card-icon {
        width: 48px;
        height: 48px;
        border-radius: 13px;
        display: inline-flex;
        justify-content: center;
        align-items: center;
        font-size: 20px;
        color: var(--primary);
        background: rgba(61, 91, 245, .08);
        margin-bottom: 18px;
    }
    .entry-card:nth-child(2) .card-icon {
        color: var(--accent);
        background: rgba(6, 182, 160, .1);
    }
    .entry-card:nth-child(3) .card-icon {
        color: #7C6AFE;
        background: rgba(124, 106, 254, .08);
    }
    .entry-card:nth-child(4) .card-icon {
        color: #f09330;
        background: rgba(240, 147, 48, .1);
    }
    .entry-card h3 {
        font-size: 18px;
        margin: 0 0 10px;
        color: var(--ink);
        font-weight: 700;
    }
    .entry-card p {
        font-size: 14.5px;
        line-height: 1.9;
        margin: 0;
        color: var(--ink-soft);
    }
    .card-index {
        position: absolute;
        top: 18px;
        right: 20px;
        font-size: 30px;
        font-weight: 800;
        color: #EDF1F7;
        line-height: 1;
        font-family: Arial, sans-serif;
    }

    /* Split block */
    .split-wrap {
        background: #fff;
        border: 1px solid var(--line-mist);
        border-radius: 22px;
        box-shadow: var(--shadow-card);
        overflow: hidden;
        display: grid;
        grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    }
    .split-media {
        position: relative;
        min-height: 400px;
        background: #EAF0FA;
    }
    .split-media img {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
    }
    .media-tag {
        position: absolute;
        left: 20px;
        bottom: 20px;
        background: rgba(255, 255, 255, .95);
        border-radius: 12px;
        padding: 12px 16px;
        box-shadow: 0 10px 24px rgba(20, 40, 90, .13);
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        max-width: 82%;
        color: var(--ink);
    }
    .media-tag i {
        color: var(--accent);
        font-size: 18px;
    }
    .split-content {
        padding: 44px 40px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    .check-list {
        display: grid;
        gap: 22px;
    }
    .check-item {
        display: grid;
        grid-template-columns: 42px 1fr;
        gap: 14px;
    }
    .check-item .check-dot {
        width: 42px;
        height: 42px;
        background: #fff;
        border: 1px solid #dde6f1;
        border-radius: 50%;
        display: flex;
        justify-content: center;
        align-items: center;
        color: var(--primary);
        box-shadow: 0 4px 12px rgba(20, 40, 90, .06);
        font-size: 16px;
    }
    .check-item h4 {
        margin: 0 0 4px;
        font-size: 17px;
        font-weight: 700;
        color: var(--ink);
    }
    .check-item p {
        font-size: 15px;
        margin: 0;
        color: var(--ink-soft);
        line-height: 1.85;
    }

    /* Flow steps */
    .step-wrap {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 18px;
        position: relative;
        margin-top: 48px;
    }
    .step-item {
        background: #fff;
        border: 1px solid var(--line-mist);
        border-radius: 17px;
        padding: 30px 22px 26px;
        position: relative;
        box-shadow: var(--shadow-card);
        transition: all .2s;
        z-index: 2;
    }
    .step-item:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-lift);
    }
    .step-num {
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: linear-gradient(135deg, #3D5BF5, #6080FF);
        color: #fff;
        display: flex;
        justify-content: center;
        align-items: center;
        font-weight: 800;
        font-size: 18px;
        margin-bottom: 18px;
        box-shadow: 0 8px 18px rgba(61, 91, 245, .25);
    }
    .step-item h3 {
        font-size: 17px;
        margin-bottom: 8px;
        font-weight: 700;
        color: var(--ink);
    }
    .step-item p {
        font-size: 14px;
        margin: 0;
        color: var(--ink-soft);
        line-height: 1.8;
    }
    .step-arrow {
        position: absolute;
        top: 50%;
        right: -16px;
        transform: translateY(-50%);
        z-index: 5;
        color: #A8B9D9;
        font-size: 18px;
        background: var(--bg-soft);
        border-radius: 50%;
        width: 34px;
        height: 34px;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    /* FAQ */
    .faq-container {
        max-width: 820px;
        margin: 0 auto;
    }
    .faq-item {
        background: #fff;
        border: 1px solid var(--line-mist);
        border-radius: 14px;
        margin-bottom: 12px;
        overflow: hidden;
        transition: border-color .2s ease, box-shadow .2s ease;
    }
    .faq-item.open {
        box-shadow: var(--shadow-card);
        border-color: rgba(61, 91, 245, .35);
    }
    .faq-item .faq-q {
        width: 100%;
        background: transparent;
        border: 0;
        text-align: left;
        padding: 22px 22px 22px 26px;
        font-size: 16px;
        font-weight: 600;
        color: var(--ink);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        line-height: 1.5;
    }
    .faq-item .faq-q:hover {
        color: var(--primary);
    }
    .faq-item.open .faq-q {
        color: var(--primary);
    }
    .faq-item .faq-icon {
        position: relative;
        width: 26px;
        height: 26px;
        flex-shrink: 0;
    }
    .faq-item .faq-icon::before,
    .faq-item .faq-icon::after {
        content: "";
        position: absolute;
        background: #7E8CA6;
        border-radius: 9px;
        transition: all .25s ease;
    }
    .faq-item .faq-icon::before {
        top: 12px;
        left: 2px;
        width: 22px;
        height: 2px;
    }
    .faq-item .faq-icon::after {
        left: 12px;
        top: 2px;
        width: 2px;
        height: 22px;
    }
    .faq-item.open .faq-icon::before {
        background: var(--primary);
        transform: rotate(180deg);
    }
    .faq-item.open .faq-icon::after {
        transform: rotate(90deg);
        background: var(--primary);
    }
    .faq-item .faq-a {
        max-height: 0;
        overflow: hidden;
        padding: 0 28px;
        transition: max-height .3s ease, padding .25s ease;
    }
    .faq-item.open .faq-a {
        max-height: 500px;
        padding-bottom: 24px;
    }
    .faq-a p {
        font-size: 15px;
        line-height: 1.9;
        color: var(--ink-soft);
        margin: 0;
        border-top: 1px dashed var(--line-mist);
        padding-top: 18px;
    }

    /* CTA band */
    .cta-band {
        background: linear-gradient(120deg, rgba(61, 91, 245, .06), rgba(6, 182, 160, .05));
        margin-bottom: 0;
        border: 1px solid #dfe8f4;
    }
    .cta-box {
        text-align: center;
        padding: 86px 28px;
        background:
            radial-gradient(circle at 90% 30%, rgba(6, 182, 160, .12), transparent 30%),
            radial-gradient(circle at 15% 80%, rgba(61, 91, 245, .1), transparent 30%);
    }
    .cta-box h2 {
        font-size: clamp(24px, 3vw, 34px);
        font-weight: 800;
        color: var(--ink);
        margin: 0 0 18px;
    }
    .cta-box p {
        max-width: 600px;
        margin: 0 auto 32px;
        color: var(--ink-soft);
        font-size: 16px;
    }
    .cta-btns {
        display: flex;
        gap: 14px;
        justify-content: center;
        flex-wrap: wrap;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: #F1F4F9;
        border-top: 1px solid #E4EAF2;
        padding-top: 64px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.7fr 1fr 1fr 1.4fr;
        gap: 36px;
        padding-bottom: 32px;
    }
    .footer-grid h4 {
        font-size: 16px;
        color: var(--ink);
        margin: 0 0 18px;
        font-weight: 700;
    }
    .footer-link-list li {
        margin-bottom: 8px;
    }
    .footer-link-list a {
        font-size: 15px;
        color: var(--ink-soft);
        line-height: 1.5;
    }
    .footer-link-list a:hover {
        color: var(--primary);
    }
    .bottom-copyright {
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        border-top: 1px solid #DCE4EE;
        padding: 22px 0;
        font-size: 14px;
        color: var(--ink-muted);
    }
    .bottom-copyright a {
        color: var(--ink-muted);
        border-bottom: 1px solid transparent;
    }
    .bottom-copyright a:hover {
        color: var(--primary);
        border-color: var(--primary);
    }

    /* Fixed bar */
    .bottom-fixed-bar {
        position: fixed;
        left: 50%;
        transform: translateX(-50%);
        bottom: 22px;
        width: calc(100% - 36px);
        max-width: 820px;
        background: rgba(255, 255, 255, .96);
        border: 1px solid #E6EAF1;
        box-shadow: 0 16px 40px rgba(20, 40, 90, .18);
        border-radius: 16px;
        padding: 14px 18px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 15px;
        z-index: 60;
        transform-baseline: keyboard;
        transform: translateX(-50%) translateY(140px);
        transition: transform .4s ease;
    }
    .bottom-fixed-bar.show {
        transform: translateX(-50%) translateY(0);
    }
    .bottom-fixed-bar .fix-text {
        display: flex;
        align-items: center;
        gap: 10px;
        min-width: 0;
    }
    .bottom-fixed-bar .fix-text i {
        color: var(--accent);
        font-size: 20px;
        flex-shrink: 0;
    }
    .bottom-fixed-bar .fix-text span {
        color: var(--ink);
        font-weight: 600;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        font-size: 15px;
    }
    .bottom-fixed-bar .fix-cta {
        flex-shrink: 0;
    }
    .bottom-fixed-bar .fix-close {
        background: none;
        border: 0;
        color: #8E9CB5;
        width: 30px;
        height: 30px;
        border-radius: 8px;
        flex-shrink: 0;
        transition: background .2s;
    }
    .bottom-fixed-bar .fix-close:hover {
        background: #F0F4F9;
        color: var(--ink);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1100px) {
        .entry-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .step-wrap {
            grid-template-columns: repeat(2, 1fr);
        }
        .step-arrow {
            display: none;
        }
        .split-wrap {
            grid-template-columns: 1fr;
        }
        .split-media {
            min-height: 300px;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            row-gap: 30px;
        }
    }
    @media (max-width: 1024px) {
        .desktop-nav-wrapper {
            display: none !important;
        }
        .mobile-toggle {
            display: inline-flex;
        }
        .header-mobile-row,
        .header-row {
            height: auto;
            min-height: 60px;
        }
        .site-header {
            height: auto;
            min-height: 60px;
        }
        .mobile-menu {
            top: 60px;
        }
        .mobile-menu.open {
            display: block;
        }
        .logo-center {
            position: absolute;
            left: 50%;
            top: 50%;
        }
        .brand-text {
            font-size: 19px;
        }
        .header-mobile-row {
            display: flex;
            align-items: center;
            height: 60px;
        }
        .header-row {
            min-height: 60px;
        }
        .hero-grid {
            grid-template-columns: 1fr;
            gap: 42px;
        }
        .hero-subtitle {
            max-width: 100%;
        }
    }
    @media (max-width: 768px) {
        .container-custom {
            padding: 0 20px;
        }
        .section {
            padding: 64px 0;
        }
        .section-sm {
            padding: 44px 0;
        }
        .hero-title {
            font-size: 30px;
        }
        .hero-btns .btn {
            width: 100%;
        }
        .trust-lines {
            flex-direction: column;
            gap: 8px;
        }
        .entry-grid {
            grid-template-columns: 1fr;
        }
        .step-wrap {
            grid-template-columns: 1fr;
        }
        .split-content {
            padding: 30px 24px;
        }
        .check-item {
            grid-template-columns: 1fr;
            gap: 8px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
        }
        .bottom-copyright {
            flex-direction: column;
            text-align: center;
            align-items: flex-start;
            gap: 6px;
        }
        .cta-box {
            padding: 58px 22px;
        }
        .btn-lg {
            padding: 15px 24px;
        }
        .browser-body > img {
            height: 220px;
        }
        .mobile-menu {
            display: block;
            visibility: hidden;
            opacity: 0;
            transform: translateY(-10px);
            transition: all .25s ease;
        }
        .mobile-menu.open {
            visibility: visible;
            opacity: 1;
            transform: translateY(0);
        }
    }
    @media (max-width: 520px) {
        .container-custom {
            padding: 0 16px;
        }
        .brand-text {
            font-size: 16px;
        }
        .brand-text i {
            margin-right: 4px;
            font-size: 15px;
        }
        .mobile-toggle {
            width: 38px;
            height: 38px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
        }
        .faq-container .faq-q {
            padding: 18px 14px 18px 18px;
            font-size: 15px;
        }
        .faq-a p {
            font-size: 14px;
        }
        .split-media {
            min-height: 220px;
        }
        .category-hero {
            padding: 42px 0 46px;
        }
    }

/* roulang page: category4 */
:root {
            --primary: #3D5BF5;
            --primary-hover: #2A3FD6;
            --primary-light: #EAF0FA;
            --accent: #F97362;
            --teal: #06B6A0;
            --bg: #F6F8FC;
            --card: #FFFFFF;
            --ink: #14223C;
            --ink-soft: #43536B;
            --ink-muted: #64748B;
            --border: #D9E1EC;
            --line: #E7EDF4;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 6px 20px rgba(20, 40, 90, 0.06);
            --shadow-hover: 0 12px 32px rgba(20, 40, 90, 0.12);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg);
            color: var(--ink);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        body.no-scroll {
            overflow: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        ::selection {
            background: rgba(61, 91, 245, 0.18);
            color: var(--ink);
        }

        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(61, 91, 245, 0.35);
            outline-offset: 2px;
            border-radius: 6px;
        }

        .container-custom {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .site-header {
            position: sticky;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 60;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--line);
            transition: box-shadow 0.25s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 8px 28px rgba(20, 40, 90, 0.08);
        }

        .header-row {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 72px;
            gap: 14px;
        }

        .logo-center {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            text-align: center;
            white-space: nowrap;
            z-index: 5;
        }

        .desktop-nav-wrapper.left {
            margin-right: auto;
            padding-left: 8px;
        }

        .desktop-nav-wrapper.right {
            margin-left: auto;
            padding-right: 8px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .nav-link-item {
            display: inline-flex;
            align-items: center;
            padding: 10px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-soft);
            border-radius: 999px;
            position: relative;
            transition: color 0.2s ease, background 0.2s ease;
        }

        .nav-link-item::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 5px;
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transform: translateX(-50%);
            transition: width 0.25s ease;
        }

        .nav-link-item:hover {
            color: var(--primary);
            background: rgba(61, 91, 245, 0.06);
        }

        .nav-link-item.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link-item.active::after {
            width: 18px;
        }

        .nav-cta-link {
            display: inline-flex;
            align-items: center;
            font-size: 15px;
            font-weight: 500;
            color: #fff;
            background: var(--primary);
            border: 1px solid var(--primary);
            padding: 9px 18px;
            border-radius: 999px;
            margin-left: 10px;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
        }

        .nav-cta-link:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 10px 22px rgba(61, 91, 245, 0.28);
        }

        .nav-cta-link:active {
            transform: translateY(0);
        }

        .brand-text {
            display: inline-flex;
            align-items: center;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--ink);
            letter-spacing: -0.4px;
            line-height: 1.25;
            white-space: nowrap;
        }

        .brand-text i {
            color: var(--primary);
            font-size: 1.15rem;
            margin-right: 4px;
        }

        .brand-text span {
            color: var(--primary);
            font-weight: 600;
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            color: var(--ink);
            background: #F1F4F9;
            font-size: 18px;
            flex-shrink: 0;
            transition: background 0.2s ease;
        }

        .mobile-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .mobile-menu {
            display: none;
            max-height: 0;
            overflow: hidden;
            background: #fff;
            border-top: 1px solid var(--line);
            transition: max-height 0.35s ease;
        }

        .mobile-menu.open {
            display: block;
            max-height: 520px;
            overflow-y: auto;
            box-shadow: 0 16px 30px rgba(20, 40, 90, 0.06);
        }

        .mobile-menu-links {
            list-style: none;
            margin: 0;
            padding: 8px 20px 20px;
        }

        .mobile-menu-links li + li {
            margin-top: 4px;
        }

        .mobile-menu-links a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 14px;
            border-radius: 12px;
            color: var(--ink-soft);
            font-size: 16px;
            font-weight: 500;
        }

        .mobile-menu-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .mobile-menu-links a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 46px;
            padding: 11px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            border: 1px solid transparent;
            text-align: center;
            white-space: nowrap;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, color 0.2s ease;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 14px 28px rgba(61, 91, 245, 0.28);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 4px 12px rgba(61, 91, 245, 0.18);
        }

        .btn-outline {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(61, 91, 245, 0.12);
        }

        .btn-outline:active {
            transform: translateY(1px);
            box-shadow: none;
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        .btn-accent:hover {
            background: #E85A4D;
            border-color: #E85A4D;
            transform: translateY(-2px);
            box-shadow: 0 14px 28px rgba(249, 115, 98, 0.28);
        }

        .btn-accent:active {
            transform: translateY(1px);
        }

        .category-hero {
            position: relative;
            padding: 86px 0 78px;
            overflow: hidden;
            border-bottom: 1px solid var(--line);
            background:
                radial-gradient(circle at 82% 18%, rgba(61, 91, 245, 0.12), transparent 38%),
                linear-gradient(110deg, rgba(255, 255, 255, 0.98) 0%, rgba(240, 245, 253, 0.96) 48%, rgba(250, 244, 242, 0.82) 100%),
                url('/assets/images/backpic/back-3.webp') no-repeat right center / cover;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            border: 1px dashed rgba(61, 91, 245, 0.18);
            left: -80px;
            bottom: -80px;
            pointer-events: none;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--ink-soft);
            margin-bottom: 30px;
            position: relative;
            z-index: 2;
        }

        .breadcrumb-nav a {
            display: inline-flex;
            align-items: center;
            color: var(--ink-muted);
        }

        .breadcrumb-nav a:hover {
            color: var(--primary);
        }

        .breadcrumb-nav .sep {
            color: #b9c3d4;
            font-size: 12px;
            margin: 0 2px;
        }

        .breadcrumb-nav .current {
            color: var(--ink);
            font-weight: 500;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(61, 91, 245, 0.2);
            background: rgba(255, 255, 255, 0.78);
            padding: 7px 15px;
            border-radius: 999px;
            font-size: 13px;
            color: var(--primary);
            font-weight: 600;
            position: relative;
            z-index: 2;
            margin-bottom: 22px;
        }

        .category-title {
            font-size: clamp(34px, 4.6vw, 54px);
            line-height: 1.18;
            letter-spacing: -1px;
            font-weight: 800;
            color: var(--ink);
            position: relative;
            z-index: 2;
            margin-bottom: 18px;
        }

        .category-title span {
            color: var(--primary);
        }

        .hero-desc {
            max-width: 660px;
            font-size: 17px;
            color: var(--ink-soft);
            line-height: 1.9;
            margin-bottom: 34px;
            position: relative;
            z-index: 2;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            position: relative;
            z-index: 2;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 26px;
            margin-top: 36px;
            position: relative;
            z-index: 2;
            padding-top: 22px;
            border-top: 1px solid rgba(61, 91, 245, 0.12);
        }

        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--ink-soft);
            font-size: 14px;
        }

        .hero-meta i {
            color: var(--teal);
        }

        .hero-visual {
            position: relative;
            z-index: 2;
        }

        .visual-window {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 16px;
            box-shadow: 0 30px 62px -24px rgba(20, 40, 90, 0.22);
            overflow: hidden;
            position: relative;
        }

        .visual-bar {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 13px 16px;
            background: #fafbff;
            border-bottom: 1px solid var(--line);
        }

        .dot {
            width: 10px;
            height: 10px;
            border-radius: 999px;
            background: #d9e1ec;
            display: inline-block;
        }

        .dot.red {
            background: #fca5a5;
        }

        .dot.yellow {
            background: #fcd34d;
        }

        .dot.green {
            background: #6ee7b7;
        }

        .visual-bar-label {
            margin-left: 8px;
            font-size: 13px;
            color: var(--ink-muted);
            font-weight: 500;
            letter-spacing: 0.2px;
        }

        .visual-body {
            padding: 0;
            position: relative;
        }

        .visual-body img {
            width: 100%;
            height: 250px;
            object-fit: cover;
            display: block;
        }

        .visual-info {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .visual-info-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            color: var(--ink-soft);
        }

        .visual-info-item i {
            color: var(--primary);
            margin-top: 4px;
            width: 18px;
            text-align: center;
        }

        .visual-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #eef9f7;
            color: #0e8a79;
            padding: 8px 13px;
            border-radius: 10px;
            font-size: 13px;
            font-weight: 600;
        }

        .section-block {
            padding: 104px 0;
        }

        .section-block-alt {
            background: var(--card);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .section-head {
            max-width: 680px;
            margin-bottom: 54px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.3px;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .section-eyebrow::before {
            content: "";
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 10px;
        }

        .section-head.center .section-eyebrow::after {
            content: "";
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 10px;
        }

        .section-title {
            font-size: clamp(26px, 3.4vw, 38px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--ink);
            letter-spacing: -0.4px;
            margin: 0 0 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--ink-soft);
            line-height: 1.9;
            margin: 0;
        }

        .card-base {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }

        .card-base:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(61, 91, 245, 0.22);
        }

        .icon-badge {
            width: 52px;
            height: 52px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 15px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 18px;
        }

        .icon-badge.teal {
            background: #e7f7f6;
            color: #0a9a87;
        }

        .icon-badge.warm {
            background: #fff2ee;
            color: #e86952;
        }

        .icon-badge.deep {
            background: #eceeff;
            color: #536cff;
        }

        .point-card {
            padding: 28px 25px 26px;
            position: relative;
        }

        .point-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin: 0 0 10px;
            color: var(--ink);
        }

        .point-card p {
            margin: 0;
            color: var(--ink-soft);
            font-size: 15px;
            line-height: 1.85;
        }

        .point-card .point-num {
            position: absolute;
            right: 22px;
            top: 20px;
            font-size: 30px;
            font-weight: 800;
            letter-spacing: -1px;
            color: rgba(61, 91, 245, 0.12);
            line-height: 1;
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .process-step {
            border-radius: 16px;
            padding: 28px 22px 24px;
            position: relative;
            background: var(--card);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .process-step:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .process-step .step-index {
            font-size: 13px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 1px;
            margin-bottom: 16px;
            display: block;
        }

        .process-step h3 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--ink);
        }

        .process-step p {
            font-size: 14px;
            color: var(--ink-soft);
            margin: 0;
            line-height: 1.8;
        }

        .process-step .step-arrow {
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: #cfd8e6;
            font-size: 16px;
        }

        .topic-feature {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 24px;
            align-items: stretch;
        }

        .feature-main-card {
            background: #fff;
            border-radius: 18px;
            overflow: hidden;
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
        }

        .feature-main-card img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }

        .feature-main-body {
            padding: 28px;
        }

        .feature-main-body h3 {
            font-size: 22px;
            font-weight: 800;
            margin: 0 0 10px;
        }

        .feature-main-body p {
            font-size: 15px;
            color: var(--ink-soft);
            line-height: 1.9;
            margin: 0 0 16px;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
        }

        .text-link i {
            transition: transform 0.2s ease;
        }

        .text-link:hover i {
            transform: translateX(4px);
        }

        .side-feature-stack {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .side-feature-card {
            display: flex;
            gap: 17px;
            padding: 21px 22px;
        }

        .side-feature-card .card-icon {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            border-radius: 13px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 17px;
        }

        .side-feature-card h4 {
            font-size: 16px;
            font-weight: 700;
            margin: 0 0 5px;
            color: var(--ink);
        }

        .side-feature-card p {
            font-size: 14px;
            color: var(--ink-soft);
            margin: 0;
            line-height: 1.8;
        }

        .scene-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .scene-copy h3 {
            font-size: 25px;
            font-weight: 800;
            line-height: 1.35;
            margin: 14px 0 16px;
        }

        .scene-copy > p {
            color: var(--ink-soft);
            font-size: 16px;
            line-height: 1.9;
            margin: 0 0 24px;
        }

        .audience-list {
            margin: 0;
            padding: 0;
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .audience-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: #fff;
            border: 1px solid var(--line);
            padding: 18px 20px;
            border-radius: 14px;
            box-shadow: var(--shadow-card);
        }

        .audience-list li i {
            margin-top: 5px;
            color: var(--primary);
        }

        .audience-list strong {
            display: block;
            font-size: 16px;
            color: var(--ink);
            margin-bottom: 2px;
        }

        .audience-list p {
            margin: 0;
            color: var(--ink-soft);
            font-size: 14px;
        }

        .scene-visual img {
            border-radius: 20px;
            box-shadow: var(--shadow-hover);
            width: 100%;
            object-fit: cover;
        }

        .notice-strip {
            background: linear-gradient(90deg, #eaf0fa, #f6f8fc);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
            padding: 42px 0;
        }

        .notice-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--line);
            padding: 24px 30px;
            box-shadow: var(--shadow-card);
        }

        .notice-inner h2 {
            font-size: 20px;
            font-weight: 800;
            margin: 0 0 4px;
        }

        .notice-inner p {
            color: var(--ink-soft);
            font-size: 14px;
            margin: 0;
        }

        .faq-wrap {
            max-width: 880px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .faq-item.open {
            border-color: rgba(61, 91, 245, 0.3);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            padding: 20px 24px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            line-height: 1.6;
        }

        .faq-question::before {
            content: "";
            width: 4px;
            height: 20px;
            border-radius: 4px;
            background: transparent;
            flex-shrink: 0;
            transition: background 0.2s ease;
        }

        .faq-item.open .faq-question::before {
            background: var(--primary);
        }

        .faq-icon {
            width: 30px;
            height: 30px;
            border-radius: 9px;
            background: #eef2f9;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--ink-muted);
            flex-shrink: 0;
            transition: background 0.2s ease, transform 0.3s ease, color 0.2s ease;
        }

        .faq-item.open .faq-icon {
            background: var(--primary-light);
            color: var(--primary);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 26px 24px;
            color: var(--ink-soft);
            font-size: 15px;
            line-height: 1.9;
            border-left: 4px solid rgba(61, 91, 245, 0.1);
            margin-left: 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 360px;
        }

        .cta-panel {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: 24px;
            padding: 56px 48px;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(61, 91, 245, 0.12), transparent 70%);
            top: -80px;
            right: -40px;
            pointer-events: none;
        }

        .cta-panel h2 {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            line-height: 1.3;
            margin: 0 0 14px;
        }

        .cta-panel p {
            color: var(--ink-soft);
            font-size: 16px;
            margin: 0 0 28px;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .site-footer {
            background: #f1f4f9;
            padding: 74px 0 34px;
            border-top: 1px solid var(--line);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
            gap: 50px;
            padding-bottom: 46px;
            border-bottom: 1px solid #e2e8f2;
        }

        .footer-link-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-link-list li + li {
            margin-top: 11px;
        }

        .footer-link-list a {
            color: var(--ink-soft);
            font-size: 15px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color 0.2s ease, transform 0.2s ease;
        }

        .footer-link-list a::before {
            content: "";
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: rgba(61, 91, 245, 0.35);
            transition: background 0.2s ease;
        }

        .footer-link-list a:hover {
            color: var(--primary);
            transform: translateX(3px);
        }

        .footer-link-list a:hover::before {
            background: var(--primary);
        }

        .bottom-copyright {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            margin-top: 28px;
            font-size: 13px;
            color: var(--ink-muted);
        }

        .bottom-copyright a {
            color: var(--ink-muted);
        }

        .bottom-copyright a:hover {
            color: var(--primary);
        }

        .scroll-top {
            position: fixed;
            right: 24px;
            bottom: 30px;
            z-index: 45;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease, background 0.2s ease, color 0.2s ease, transform 0.2s ease;
        }

        .scroll-top.show {
            opacity: 1;
            visibility: visible;
        }

        .scroll-top:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        @media (max-width: 1023px) {
            .desktop-nav-wrapper {
                display: none !important;
            }

            .mobile-toggle {
                display: inline-flex;
                margin-right: auto;
            }

            .logo-center {
                position: static;
                transform: none;
                margin-left: auto;
                margin-right: 6px;
            }

            .header-row {
                min-height: 64px;
                justify-content: space-between;
            }
        }

        @media (max-width: 767px) {
            body {
                font-size: 15px;
            }

            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }

            .header-row {
                min-height: 60px;
            }

            .brand-text {
                font-size: 1.16rem;
            }

            .section-block {
                padding: 64px 0;
            }

            .section-head {
                margin-bottom: 34px;
            }

            .section-title {
                font-size: 26px;
            }

            .category-hero {
                padding: 50px 0 54px;
            }

            .category-title {
                font-size: 32px;
            }

            .hero-desc {
                font-size: 15px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .breadcrumb-nav {
                margin-bottom: 18px;
            }

            .visual-body img {
                height: 200px;
            }

            .process-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .process-step {
                display: flex;
                gap: 16px;
                align-items: flex-start;
            }

            .process-step .step-index {
                margin-bottom: 0;
                flex-shrink: 0;
                margin-top: 2px;
            }

            .process-step .step-arrow {
                display: none;
            }

            .topic-feature {
                grid-template-columns: 1fr;
            }

            .feature-main-card img {
                height: 200px;
            }

            .feature-main-body {
                padding: 20px;
            }

            .scene-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .notice-inner {
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
            }

            .cta-panel {
                padding: 38px 22px;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .bottom-copyright {
                flex-direction: column;
                align-items: flex-start;
            }

            .scroll-top {
                right: 16px;
                bottom: 18px;
            }
        }

        @media (max-width: 520px) {
            .brand-text span {
                display: none;
            }

            .brand-text {
                font-size: 1.12rem;
            }

            .hero-actions,
            .cta-actions {
                gap: 10px;
            }

            .faq-question {
                padding: 16px 16px;
                font-size: 15px;
            }

            .faq-answer-inner {
                padding: 0 18px 20px;
                margin-left: 16px;
            }

            .visual-info {
                padding: 16px;
            }
        }