/* roulang page: index */
:root {
            --primary: #D6E8F5;
            --primary-dark: #B8D0E0;
            --accent-1: #FF6A33;
            --accent-1-hover: #E55A2A;
            --accent-2: #1A2A4A;
            --accent-2-hover: #0F1D35;
            --bg: #F5F8FB;
            --card-bg: #FFFFFF;
            --text: #2C3E50;
            --text-weak: #7A8BA0;
            --border: #E8F0F8;
            --border-focus: #FF6A33;
            --radius-card: 16px;
            --radius-btn: 24px;
            --radius-input: 12px;
            --shadow-card: 0 8px 20px rgba(26, 42, 74, 0.08);
            --shadow-card-hover: 0 12px 32px rgba(26, 42, 74, 0.16);
            --shadow-phone: 0 20px 48px rgba(26, 42, 74, 0.18);
            --transition: 0.3s ease;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --nav-width: 240px;
            --header-h-mobile: 56px;
            --max-width: 1200px;
            --gap-section: 80px;
            --gap-section-mobile: 48px;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--accent-1); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent-2); }
        a:focus, button:focus, input:focus { outline: 2px solid var(--accent-1); outline-offset: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-family: var(--font-stack); color: var(--accent-2); font-weight: 700; line-height: 1.3; }
        h1 { font-size: 32px; letter-spacing: -0.02em; }
        h2 { font-size: 26px; }
        h3 { font-size: 20px; font-weight: 600; }
        .text-small { font-size: 13px; color: var(--text-weak); }
        .text-muted { color: var(--text-weak); }

        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section { padding: var(--gap-section) 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { font-size: 32px; margin-bottom: 12px; }
        .section-title p { color: var(--text-weak); font-size: 18px; max-width: 600px; margin: 0 auto; }

        /* ===== Layout: App Shell ===== */
        .app-wrapper { display: flex; min-height: 100vh; }
        .nav-sidebar {
            width: var(--nav-width);
            position: fixed; top: 0; left: 0; bottom: 0;
            background: var(--card-bg);
            border-right: 1px solid var(--border);
            display: flex; flex-direction: column;
            z-index: 100;
            padding: 24px 0;
            overflow-y: auto;
        }
        .nav-sidebar .logo-area {
            padding: 0 24px 32px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 16px;
        }
        .nav-sidebar .logo-area a {
            font-size: 18px;
            font-weight: 700;
            color: var(--accent-2);
            display: flex; align-items: center; gap: 10px;
        }
        .nav-sidebar .logo-area a i { color: var(--accent-1); font-size: 22px; }
        .nav-sidebar .nav-menu { flex: 1; padding: 0 12px; }
        .nav-sidebar .nav-menu li { margin-bottom: 4px; }
        .nav-sidebar .nav-menu a {
            display: flex; align-items: center; gap: 12px;
            padding: 12px 16px;
            border-radius: 10px;
            color: var(--text);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
            position: relative;
        }
        .nav-sidebar .nav-menu a i { width: 20px; text-align: center; color: var(--text-weak); font-size: 16px; transition: color var(--transition); }
        .nav-sidebar .nav-menu a:hover { background: var(--primary); color: var(--accent-2); }
        .nav-sidebar .nav-menu a:hover i { color: var(--accent-1); }
        .nav-sidebar .nav-menu a.active {
            background: var(--primary);
            color: var(--accent-2);
            font-weight: 600;
            box-shadow: inset 4px 0 0 var(--accent-1);
        }
        .nav-sidebar .nav-menu a.active i { color: var(--accent-1); }
        .nav-sidebar .nav-footer {
            padding: 16px 24px 0;
            border-top: 1px solid var(--border);
            margin-top: 16px;
            font-size: 12px;
            color: var(--text-weak);
        }
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-width: 0;
            background: var(--bg);
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed; top: 0; left: 0; right: 0;
            height: var(--header-h-mobile);
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            z-index: 200;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-header .menu-toggle {
            background: none; border: none; font-size: 24px;
            color: var(--accent-2); cursor: pointer; padding: 8px;
        }
        .mobile-header .logo-text {
            font-size: 17px; font-weight: 700; color: var(--accent-2);
        }
        .mobile-header .logo-text i { color: var(--accent-1); margin-right: 6px; }
        .mobile-header .header-spacer { width: 40px; }

        /* ===== Drawer Overlay ===== */
        .drawer-overlay {
            display: none;
            position: fixed; inset: 0;
            background: rgba(26, 42, 74, 0.5);
            z-index: 150;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .drawer-overlay.open { opacity: 1; pointer-events: auto; }

        .drawer-menu {
            position: fixed; top: 0; left: -280px; bottom: 0;
            width: 280px;
            background: var(--card-bg);
            z-index: 160;
            padding: 24px 0;
            transition: left var(--transition);
            box-shadow: 4px 0 24px rgba(26, 42, 74, 0.12);
            overflow-y: auto;
        }
        .drawer-menu.open { left: 0; }
        .drawer-menu .drawer-logo {
            padding: 0 20px 24px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 16px;
            font-size: 17px; font-weight: 700; color: var(--accent-2);
        }
        .drawer-menu .drawer-logo i { color: var(--accent-1); margin-right: 8px; }
        .drawer-menu .drawer-nav a {
            display: flex; align-items: center; gap: 12px;
            padding: 14px 20px;
            color: var(--text);
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
        }
        .drawer-menu .drawer-nav a i { width: 20px; color: var(--text-weak); }
        .drawer-menu .drawer-nav a:hover { background: var(--primary); color: var(--accent-2); }
        .drawer-menu .drawer-nav a.active { background: var(--primary); color: var(--accent-2); font-weight: 600; }
        .drawer-menu .drawer-footer {
            padding: 20px;
            border-top: 1px solid var(--border);
            margin-top: 16px;
            font-size: 12px;
            color: var(--text-weak);
        }

        /* ===== Hero ===== */
        .hero {
            background: var(--primary);
            padding: 100px 0 80px;
            position: relative;
            overflow: hidden;
        }
        .hero .hero-grid { display: flex; align-items: center; gap: 48px; }
        .hero .hero-text { flex: 0 0 42%; }
        .hero .hero-visual { flex: 0 0 58%; display: flex; justify-content: center; }
        .hero h1 { font-size: 36px; line-height: 1.3; margin-bottom: 16px; color: var(--accent-2); }
        .hero h1 span { color: var(--accent-1); }
        .hero .hero-sub { font-size: 18px; color: var(--text); margin-bottom: 28px; line-height: 1.6; opacity: 0.85; }
        .hero .hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero .btn-primary {
            display: inline-flex; align-items: center; gap: 8px;
            background: var(--accent-1); color: #fff;
            padding: 14px 40px; border-radius: var(--radius-btn);
            font-size: 16px; font-weight: 600; border: none; cursor: pointer;
            transition: all var(--transition);
        }
        .hero .btn-primary:hover { background: var(--accent-2); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,42,74,0.2); }
        .hero .btn-secondary {
            display: inline-flex; align-items: center; gap: 8px;
            background: transparent; color: var(--accent-2);
            padding: 14px 40px; border-radius: var(--radius-btn);
            font-size: 16px; font-weight: 600; border: 2px solid var(--accent-2); cursor: pointer;
            transition: all var(--transition);
        }
        .hero .btn-secondary:hover { background: var(--accent-2); color: #fff; transform: translateY(-2px); }

        .phone-frame {
            width: 280px; height: 560px;
            background: #fff;
            border-radius: 32px;
            box-shadow: var(--shadow-phone);
            padding: 12px;
            position: relative;
            flex-shrink: 0;
        }
        .phone-frame .phone-screen {
            width: 100%; height: 100%;
            border-radius: 24px;
            overflow: hidden;
            background: var(--bg);
            display: flex; flex-direction: column;
        }
        .phone-frame .phone-status {
            height: 32px; background: var(--accent-2);
            display: flex; align-items: center; justify-content: space-between;
            padding: 0 16px; font-size: 11px; color: #fff; flex-shrink: 0;
        }
        .phone-frame .phone-content {
            flex: 1;
            display: flex; align-items: center; justify-content: center;
            overflow: hidden;
        }
        .phone-frame .phone-content img {
            width: 100%; height: 100%; object-fit: cover;
        }
        .phone-notch {
            position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
            width: 120px; height: 22px; background: #000; border-radius: 0 0 12px 12px;
        }

        /* ===== Hot Cards ===== */
        .hot-cards-scroll {
            display: flex; gap: 20px;
            overflow-x: auto;
            padding-bottom: 16px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .hot-cards-scroll::-webkit-scrollbar { display: none; }
        .hot-card {
            flex: 0 0 280px;
            scroll-snap-align: start;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition);
            cursor: pointer;
            position: relative;
        }
        .hot-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
        .hot-card .card-img {
            position: relative; aspect-ratio: 16 / 9; overflow: hidden;
            background: var(--primary);
        }
        .hot-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
        .hot-card:hover .card-img img { transform: scale(1.05); }
        .hot-card .card-img .card-badge {
            position: absolute; bottom: 12px; left: 12px;
            background: var(--accent-1); color: #fff;
            font-size: 12px; font-weight: 600; padding: 4px 14px; border-radius: 20px;
        }
        .hot-card .card-img .card-title-overlay {
            position: absolute; bottom: 12px; right: 12px;
            color: #fff; font-size: 16px; font-weight: 700;
            text-shadow: 0 2px 8px rgba(0,0,0,0.5);
        }
        .hot-card .card-body { padding: 16px 20px 20px; }
        .hot-card .card-body .card-title { font-size: 16px; font-weight: 600; margin-bottom: 6px; color: var(--accent-2); }
        .hot-card .card-body .card-desc { font-size: 14px; color: var(--text-weak); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

        /* =====种草清单 ===== */
        .seed-list { max-width: 720px; margin: 0 auto; }
        .seed-item {
            display: flex; align-items: center; gap: 16px;
            padding: 16px 20px;
            border-radius: 12px;
            transition: background var(--transition);
            cursor: pointer;
            border-bottom: 1px solid var(--border);
        }
        .seed-item:last-child { border-bottom: none; }
        .seed-item:hover { background: var(--bg); }
        .seed-item .seed-icon {
            width: 44px; height: 44px; flex-shrink: 0;
            background: var(--primary); border-radius: 12px;
            display: flex; align-items: center; justify-content: center;
            font-size: 20px; color: var(--accent-1);
        }
        .seed-item .seed-info { flex: 1; }
        .seed-item .seed-info .seed-title { font-size: 17px; font-weight: 600; color: var(--accent-2); }
        .seed-item .seed-info .seed-desc { font-size: 14px; color: var(--text-weak); margin-top: 2px; }
        .seed-item .seed-arrow { color: var(--text-weak); font-size: 18px; flex-shrink: 0; }

        /* ===== Reviews ===== */
        .reviews-scroll {
            display: flex; gap: 20px;
            overflow-x: auto;
            padding-bottom: 12px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .reviews-scroll::-webkit-scrollbar { display: none; }
        .review-card {
            flex: 0 0 280px;
            scroll-snap-align: start;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: 0 4px 12px rgba(26,42,74,0.06);
            padding: 20px;
            border: 1px solid var(--border);
        }
        .review-card .review-avatar {
            width: 46px; height: 46px; border-radius: 50%;
            background: var(--primary); flex-shrink: 0;
            display: flex; align-items: center; justify-content: center;
            font-size: 18px; color: var(--accent-2); font-weight: 600;
        }
        .review-card .review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
        .review-card .review-name { font-size: 14px; font-weight: 600; color: var(--accent-2); }
        .review-card .review-stars { color: var(--accent-1); font-size: 14px; letter-spacing: 2px; }
        .review-card .review-stars .empty { color: var(--primary); }
        .review-card .review-text { font-size: 15px; line-height: 1.5; color: var(--text); font-style: italic; }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 100%);
            padding: 80px 0;
            text-align: center;
            color: #fff;
        }
        .cta-block h2 { color: #fff; font-size: 36px; margin-bottom: 12px; }
        .cta-block p { font-size: 18px; opacity: 0.9; margin-bottom: 32px; }
        .cta-block .btn-cta {
            display: inline-flex; align-items: center; gap: 10px;
            background: #fff; color: var(--accent-2);
            padding: 16px 48px; border-radius: var(--radius-btn);
            font-size: 18px; font-weight: 700; border: none; cursor: pointer;
            transition: all var(--transition);
        }
        .cta-block .btn-cta:hover { background: var(--accent-1); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }

        /* ===== CMS ===== */
        .cms-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .cms-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition);
        }
        .cms-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
        .cms-card .cms-img { aspect-ratio: 16 / 9; background: var(--primary); overflow: hidden; }
        .cms-card .cms-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
        .cms-card:hover .cms-img img { transform: scale(1.05); }
        .cms-card .cms-body { padding: 20px 20px 24px; }
        .cms-card .cms-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; font-size: 13px; color: var(--text-weak); }
        .cms-card .cms-meta .cms-tag { background: var(--primary); color: var(--accent-2); padding: 2px 12px; border-radius: 12px; font-size: 12px; font-weight: 500; }
        .cms-card .cms-title { font-size: 17px; font-weight: 600; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .cms-card .cms-title a { color: var(--accent-2); }
        .cms-card .cms-title a:hover { color: var(--accent-1); }
        .cms-card .cms-excerpt { font-size: 14px; color: var(--text-weak); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
        .cms-card .cms-readmore { font-size: 14px; font-weight: 500; color: var(--accent-1); display: inline-flex; align-items: center; gap: 4px; }
        .cms-card .cms-readmore:hover { color: var(--accent-2); }
        .cms-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            color: var(--text-weak);
            font-size: 16px;
            border: 1px dashed var(--border);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--accent-2);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 0;
        }
        .site-footer .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; }
        .site-footer h4 { color: #fff; font-size: 18px; margin-bottom: 16px; }
        .site-footer .footer-logo { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
        .site-footer .footer-logo i { color: var(--accent-1); }
        .site-footer .footer-desc { font-size: 14px; line-height: 1.7; opacity: 0.8; max-width: 300px; }
        .site-footer .footer-links a { display: block; padding: 6px 0; color: rgba(255,255,255,0.7); font-size: 14px; transition: color var(--transition); }
        .site-footer .footer-links a:hover { color: var(--accent-1); }
        .site-footer .footer-contact p { font-size: 14px; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; opacity: 0.8; }
        .site-footer .footer-contact i { width: 18px; color: var(--accent-1); }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.15);
            padding: 20px 0;
            margin-top: 48px;
            text-align: center;
            font-size: 13px;
            opacity: 0.7;
        }

        /* ===== Buttons ===== */
        .btn-primary, .btn-secondary, .btn-cta { transition: all var(--transition); }
        .btn-primary:active, .btn-secondary:active, .btn-cta:active { transform: scale(0.97); }

        /* ===== Tags ===== */
        .tag {
            display: inline-block;
            background: var(--primary);
            color: var(--accent-2);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
        }
        .tag-accent { background: var(--accent-1); color: #fff; }

        /* ===== Divider ===== */
        .divider { border: none; border-top: 1px solid var(--border); margin: 0; }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .cms-grid { grid-template-columns: repeat(2, 1fr); }
            .hero .hero-grid { flex-direction: column; text-align: center; }
            .hero .hero-text { flex: 0 0 100%; }
            .hero .hero-visual { flex: 0 0 100%; margin-top: 32px; }
            .hero .hero-cta { justify-content: center; }
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media screen and (max-width: 768px) {
            .nav-sidebar { display: none; }
            .mobile-header { display: flex; }
            .main-content { margin-left: 0; padding-top: var(--header-h-mobile); }
            .drawer-overlay { display: block; pointer-events: none; }
            .drawer-overlay.open { pointer-events: auto; }
            .section { padding: var(--gap-section-mobile) 0; }
            .hero { padding: 60px 0 48px; }
            .hero h1 { font-size: 26px; }
            .hero .hero-sub { font-size: 16px; }
            .phone-frame { width: 220px; height: 440px; border-radius: 24px; padding: 8px; }
            .phone-frame .phone-screen { border-radius: 18px; }
            .phone-frame .phone-status { height: 26px; font-size: 10px; padding: 0 12px; }
            .phone-notch { width: 90px; height: 18px; top: 8px; }
            .section-title h2 { font-size: 26px; }
            .cms-grid { grid-template-columns: 1fr; }
            .cta-block h2 { font-size: 26px; }
            .cta-block p { font-size: 16px; }
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            h1 { font-size: 26px; }
            h2 { font-size: 22px; }
        }

        @media screen and (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 22px; }
            .hero .btn-primary, .hero .btn-secondary { padding: 12px 28px; font-size: 14px; }
            .phone-frame { width: 180px; height: 360px; border-radius: 20px; padding: 6px; }
            .phone-frame .phone-screen { border-radius: 14px; }
            .phone-frame .phone-status { height: 22px; font-size: 9px; padding: 0 10px; }
            .phone-notch { width: 70px; height: 14px; top: 6px; }
            .hot-card { flex: 0 0 240px; }
            .review-card { flex: 0 0 240px; }
            .seed-item { padding: 12px 16px; }
            .seed-item .seed-icon { width: 36px; height: 36px; font-size: 16px; }
            .cta-block .btn-cta { padding: 14px 32px; font-size: 16px; }
        }

        @media screen and (min-width: 769px) {
            .drawer-overlay { display: none !important; }
            .drawer-menu { display: none !important; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #D6E8F5;
            --secondary: #FF6A33;
            --deep: #1A2A4A;
            --bg: #F5F8FB;
            --card-bg: #FFFFFF;
            --text: #2C3E50;
            --text-light: #7A8BA0;
            --border: #E8F0F8;
            --shadow: 0 8px 20px rgba(26, 42, 74, 0.08);
            --shadow-hover: 0 12px 32px rgba(26, 42, 74, 0.16);
            --radius-card: 16px;
            --radius-btn: 24px;
            --radius-input: 12px;
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --nav-width: 240px;
            --max-width: 1200px;
            --gap-section: 80px;
            --gap-card: 32px;
            --padding-card: 24px;
        }

        /* ===== Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        a:hover {
            color: var(--deep);
        }
        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }

        /* ===== Layout: App Shell ===== */
        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        /* ===== Sidebar Navigation ===== */
        .nav-sidebar {
            width: var(--nav-width);
            background: var(--card-bg);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 100;
            padding: 0;
            overflow-y: auto;
            transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .logo-area {
            padding: 28px 20px 20px;
            border-bottom: 1px solid var(--border);
        }
        .logo-area a {
            font-size: 18px;
            font-weight: 700;
            color: var(--deep);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-area a i {
            color: var(--secondary);
            font-size: 22px;
        }
        .logo-area a:hover {
            color: var(--deep);
        }

        .nav-menu {
            flex: 1;
            padding: 16px 0;
        }
        .nav-menu li {
            margin: 2px 8px;
        }
        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 10px;
            color: var(--text);
            font-weight: 500;
            font-size: 15px;
            transition: all 0.25s ease;
            position: relative;
        }
        .nav-menu li a i {
            width: 20px;
            text-align: center;
            color: var(--text-light);
            font-size: 16px;
            transition: color 0.25s ease;
        }
        .nav-menu li a:hover {
            background: var(--bg);
            color: var(--deep);
        }
        .nav-menu li a:hover i {
            color: var(--secondary);
        }
        .nav-menu li a.active {
            background: var(--bg);
            color: var(--deep);
            font-weight: 600;
            box-shadow: inset 4px 0 0 var(--secondary);
        }
        .nav-menu li a.active i {
            color: var(--secondary);
        }

        .nav-footer {
            padding: 20px 20px 24px;
            border-top: 1px solid var(--border);
            font-size: 12px;
            color: var(--text-light);
            text-align: center;
            line-height: 1.6;
        }
        .nav-footer i {
            margin-right: 4px;
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            padding: 0 16px;
            height: 56px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 99;
            box-shadow: 0 2px 8px rgba(26, 42, 74, 0.04);
        }
        .mobile-header .logo-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--deep);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .logo-text i {
            color: var(--secondary);
            font-size: 20px;
        }
        .hamburger-btn {
            font-size: 22px;
            color: var(--deep);
            padding: 6px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .hamburger-btn:hover {
            background: var(--bg);
        }
        .hamburger-btn:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
        }

        /* ===== Mobile Overlay ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(26, 42, 74, 0.5);
            z-index: 99;
            opacity: 0;
            transition: opacity 0.35s ease;
        }
        .nav-overlay.open {
            opacity: 1;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            background: var(--primary);
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .page-banner .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }
        .page-banner h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--deep);
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }
        .page-banner .breadcrumb {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .page-banner .breadcrumb a {
            color: var(--text-light);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--secondary);
        }
        .page-banner .breadcrumb span {
            color: var(--deep);
            font-weight: 500;
        }
        .page-banner p {
            font-size: 18px;
            color: var(--text);
            max-width: 640px;
            line-height: 1.7;
        }

        /* ===== Sections Common ===== */
        .section-block {
            padding: 72px 0;
        }
        .section-block .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--deep);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-sub {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 40px;
            max-width: 600px;
        }
        .section-sub.full {
            max-width: 100%;
        }

        /* ===== Hero Section (分类页专属) ===== */
        .category-hero {
            background: var(--primary);
            padding: 80px 0 72px;
            position: relative;
            overflow: hidden;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255, 106, 51, 0.06);
            pointer-events: none;
        }
        .category-hero .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            gap: 48px;
            position: relative;
            z-index: 1;
        }
        .category-hero .hero-text {
            flex: 1 1 50%;
        }
        .category-hero .hero-text h1 {
            font-size: 34px;
            font-weight: 700;
            color: var(--deep);
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .category-hero .hero-text p {
            font-size: 18px;
            color: var(--text);
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 520px;
        }
        .category-hero .hero-text .cta-btn {
            display: inline-block;
            padding: 14px 40px;
            background: var(--secondary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(255, 106, 51, 0.3);
        }
        .category-hero .hero-text .cta-btn:hover {
            background: var(--deep);
            color: #fff;
            box-shadow: 0 6px 20px rgba(26, 42, 74, 0.25);
            transform: translateY(-2px);
        }
        .category-hero .hero-image {
            flex: 1 1 50%;
            text-align: center;
        }
        .category-hero .hero-image img {
            max-width: 100%;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow);
            max-height: 400px;
            object-fit: cover;
        }

        /* ===== Security Features Grid ===== */
        .security-features {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap-card);
        }
        .security-features .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: var(--padding-card);
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            border: 1px solid var(--border);
        }
        .security-features .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .security-features .feature-card .icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--secondary);
            margin-bottom: 16px;
        }
        .security-features .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--deep);
            margin-bottom: 8px;
        }
        .security-features .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== Step Flow ===== */
        .step-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: var(--padding-card);
            box-shadow: var(--shadow);
            text-align: center;
            position: relative;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }
        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--secondary);
            color: #fff;
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(255, 106, 51, 0.25);
        }
        .step-item .step-icon {
            font-size: 32px;
            color: var(--secondary);
            margin: 12px 0 10px;
        }
        .step-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--deep);
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.5;
        }

        /* ===== Tips List ===== */
        .tips-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .tips-list .tip-item {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            box-shadow: var(--shadow);
            display: flex;
            align-items: flex-start;
            gap: 16px;
            border-left: 4px solid var(--secondary);
            transition: all 0.3s ease;
        }
        .tips-list .tip-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }
        .tips-list .tip-item .tip-icon {
            font-size: 20px;
            color: var(--secondary);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .tips-list .tip-item .tip-content h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--deep);
            margin-bottom: 4px;
        }
        .tips-list .tip-item .tip-content p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== FAQ Accordion ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(26, 42, 74, 0.04);
            transition: box-shadow 0.3s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-item .faq-question {
            padding: 18px 24px;
            font-size: 17px;
            font-weight: 600;
            color: var(--deep);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: background 0.2s;
        }
        .faq-item .faq-question:hover {
            background: var(--bg);
        }
        .faq-item .faq-question i {
            color: var(--secondary);
            transition: transform 0.35s ease;
            font-size: 14px;
        }
        .faq-item .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text);
            line-height: 1.7;
            display: none;
        }
        .faq-item .faq-answer.open {
            display: block;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--deep) 100%);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-section .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .cta-btn-light {
            display: inline-block;
            padding: 14px 44px;
            background: #fff;
            color: var(--deep);
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
        }
        .cta-section .cta-btn-light:hover {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 6px 24px rgba(255, 106, 51, 0.35);
            transform: translateY(-2px);
        }

        /* ===== Back Link ===== */
        .back-home-wrap {
            text-align: center;
            padding: 40px 0 16px;
        }
        .back-home-wrap a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            color: var(--text-light);
            font-weight: 500;
            transition: color 0.3s;
        }
        .back-home-wrap a:hover {
            color: var(--secondary);
        }
        .back-home-wrap a i {
            font-size: 14px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--deep);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 0;
            margin-top: auto;
        }
        .site-footer .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-logo i {
            color: var(--secondary);
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .site-footer h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: var(--secondary);
        }
        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-contact p i {
            color: var(--secondary);
            width: 16px;
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 0;
        }
        .footer-bottom i {
            margin-right: 4px;
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .security-features {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-flow {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .category-hero .container {
                flex-direction: column;
                text-align: center;
            }
            .category-hero .hero-text p {
                margin-left: auto;
                margin-right: auto;
            }
            .category-hero .hero-image img {
                max-height: 300px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media screen and (max-width: 768px) {
            :root {
                --gap-section: 48px;
                --gap-card: 20px;
            }

            .nav-sidebar {
                transform: translateX(-100%);
            }
            .nav-sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .nav-overlay.open {
                display: block;
            }
            .main-content {
                margin-left: 0;
            }

            .page-banner {
                padding: 48px 0 40px;
            }
            .page-banner h1 {
                font-size: 24px;
            }
            .page-banner p {
                font-size: 15px;
            }

            .category-hero {
                padding: 48px 0 40px;
            }
            .category-hero .hero-text h1 {
                font-size: 26px;
            }
            .category-hero .hero-text p {
                font-size: 15px;
            }
            .category-hero .hero-text .cta-btn {
                padding: 12px 32px;
                font-size: 15px;
            }

            .section-block {
                padding: 48px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .section-sub {
                font-size: 14px;
                margin-bottom: 28px;
            }

            .security-features {
                grid-template-columns: 1fr;
            }
            .step-flow {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .tips-list {
                grid-template-columns: 1fr;
            }

            .faq-item .faq-question {
                font-size: 15px;
                padding: 14px 18px;
            }
            .faq-item .faq-answer {
                font-size: 14px;
                padding: 0 18px 14px;
            }

            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .cta-section .cta-btn-light {
                padding: 12px 32px;
                font-size: 15px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-desc {
                max-width: 100%;
            }

            .back-home-wrap {
                padding: 24px 0 8px;
            }
        }

        @media screen and (max-width: 520px) {
            .category-hero .hero-image img {
                max-height: 220px;
            }
            .security-features .feature-card {
                padding: 18px;
            }
            .step-item {
                padding: 18px;
            }
            .tips-list .tip-item {
                padding: 16px 18px;
            }
            .site-footer {
                padding: 36px 0 0;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #D6E8F5;
            --primary-dark: #b8d0e3;
            --accent1: #FF6A33;
            --accent1-hover: #e8551f;
            --accent2: #1A2A4A;
            --accent2-hover: #2c3e6b;
            --bg-body: #F5F8FB;
            --bg-card: #FFFFFF;
            --text-body: #2C3E50;
            --text-muted: #7A8BA0;
            --text-light: #FFFFFF;
            --border-color: #E8F0F8;
            --border-focus: #FF6A33;
            --radius-card: 16px;
            --radius-btn: 24px;
            --radius-input: 12px;
            --shadow-card: 0 8px 20px rgba(26, 42, 74, 0.08);
            --shadow-card-hover: 0 12px 32px rgba(26, 42, 74, 0.16);
            --shadow-hero: 0 16px 40px rgba(26, 42, 74, 0.12);
            --nav-width: 240px;
            --header-height: 56px;
            --transition-speed: 0.3s;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --max-width: 1200px;
        }

        /* ===== Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-stack);
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--accent1); text-decoration: none; transition: color var(--transition-speed) ease; }
        a:hover, a:focus { color: var(--accent2); }
        a:focus-visible { outline: 2px solid var(--accent1); outline-offset: 2px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-card); }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--accent2); }
        p { margin-bottom: 1rem; }

        /* ===== Layout ===== */
        .app-layout {
            display: flex;
            min-height: 100vh;
            background: var(--bg-body);
        }
        .main-content {
            flex: 1;
            margin-left: var(--nav-width);
            padding: 0;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        .container-narrow {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== Sidebar Navigation ===== */
        .nav-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--bg-card);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            padding: 28px 0 20px;
            z-index: 1000;
            transition: transform var(--transition-speed) ease;
            overflow-y: auto;
        }
        .logo-area {
            padding: 0 20px 24px;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 16px;
        }
        .logo-area a {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--accent2);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.02em;
        }
        .logo-area a i { color: var(--accent1); font-size: 1.5rem; }
        .logo-area a:hover { color: var(--accent1); }

        .nav-menu { flex: 1; padding: 0 12px; }
        .nav-menu li { margin-bottom: 4px; }
        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 12px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition-speed) ease;
            position: relative;
        }
        .nav-menu li a i { font-size: 1.1rem; width: 22px; text-align: center; color: var(--text-muted); transition: color var(--transition-speed) ease; }
        .nav-menu li a:hover { background: var(--primary); color: var(--accent2); }
        .nav-menu li a:hover i { color: var(--accent1); }
        .nav-menu li a.active {
            background: var(--primary);
            color: var(--accent2);
            font-weight: 600;
            box-shadow: inset 4px 0 0 var(--accent1);
        }
        .nav-menu li a.active i { color: var(--accent1); }

        .nav-footer {
            padding: 20px 20px 0;
            border-top: 1px solid var(--border-color);
            margin-top: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            z-index: 1100;
            align-items: center;
            padding: 0 16px;
            box-shadow: 0 2px 8px rgba(26,42,74,0.06);
        }
        .mobile-header .hamburger {
            font-size: 1.5rem;
            color: var(--accent2);
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .mobile-header .mobile-logo {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--accent2);
            margin-left: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.02em;
        }
        .mobile-header .mobile-logo i { color: var(--accent1); }
        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(26,42,74,0.5);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition-speed) ease;
            pointer-events: none;
        }
        .mobile-overlay.active {
            display: block;
            opacity: 1;
            pointer-events: auto;
        }

        /* ===== Hero / Page Header ===== */
        .page-header {
            background: var(--primary);
            padding: 40px 0 32px;
            margin-bottom: 40px;
        }
        .page-header h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent2);
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin-bottom: 8px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            font-size: 0.875rem;
            color: var(--text-muted);
            padding: 16px 0 0;
            margin-bottom: 8px;
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--accent1); }
        .breadcrumb .sep { margin: 0 8px; color: var(--text-muted); opacity: 0.5; }
        .breadcrumb .current { color: var(--accent2); font-weight: 500; }

        /* ===== Article Meta ===== */
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 32px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border-color);
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta i { color: var(--accent1); }

        /* ===== Article Body ===== */
        .article-body {
            font-size: 1.125rem;
            line-height: 1.8;
            color: var(--text-body);
            max-width: 760px;
            margin: 0 auto;
        }
        .article-body p { margin-bottom: 1.75rem; }
        .article-body h2 { font-size: 1.625rem; margin-top: 2.5rem; margin-bottom: 1rem; color: var(--accent2); font-weight: 700; }
        .article-body h3 { font-size: 1.25rem; margin-top: 2rem; margin-bottom: 0.75rem; color: var(--accent2); font-weight: 600; }
        .article-body ul, .article-body ol { margin-bottom: 1.75rem; padding-left: 1.5rem; }
        .article-body ul li { list-style: disc; margin-bottom: 0.5rem; }
        .article-body ol li { list-style: decimal; margin-bottom: 0.5rem; }
        .article-body blockquote {
            border-left: 4px solid var(--accent1);
            background: var(--primary);
            padding: 16px 24px;
            margin: 1.5rem 0;
            border-radius: 8px;
            font-style: normal;
            color: var(--text-body);
        }
        .article-body blockquote p:last-child { margin-bottom: 0; }
        .article-body img { border-radius: var(--radius-card); margin: 1.5rem auto; box-shadow: var(--shadow-card); }
        .article-body a { color: var(--accent1); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { color: var(--accent2); }
        .article-body code {
            background: var(--primary);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 0.9em;
            color: var(--accent2);
        }
        .article-body pre {
            background: var(--accent2);
            color: #e8e8e8;
            padding: 20px 24px;
            border-radius: var(--radius-card);
            overflow-x: auto;
            margin: 1.5rem 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== Article Not Found ===== */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            max-width: 600px;
            margin: 40px auto;
        }
        .article-not-found i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; display: block; }
        .article-not-found p { font-size: 1.2rem; color: var(--text-muted); margin-bottom: 24px; }
        .article-not-found a { display: inline-block; padding: 12px 32px; background: var(--accent1); color: #fff; border-radius: var(--radius-btn); font-weight: 600; }
        .article-not-found a:hover { background: var(--accent2); color: #fff; }

        /* ===== Related Posts ===== */
        .related-section {
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid var(--border-color);
        }
        .related-section h2 {
            font-size: 1.625rem;
            font-weight: 700;
            color: var(--accent2);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section h2 i { color: var(--accent1); }
        .related-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all var(--transition-speed) ease;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .related-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
        }
        .related-card .card-body {
            padding: 16px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--accent2);
            margin-bottom: 8px;
            line-height: 1.4;
            transition: color var(--transition-speed) ease;
        }
        .related-card:hover .card-body h3 { color: var(--accent1); }
        .related-card .card-body .date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .related-card .card-body .date i { color: var(--accent1); font-size: 0.75rem; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--accent2);
            color: rgba(255,255,255,0.85);
            padding: 56px 0 0;
            margin-top: 80px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-logo i { color: var(--accent1); }
        .footer-desc { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.7); max-width: 360px; }
        .site-footer h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-links { display: flex; flex-direction: column; gap: 10px; }
        .footer-links a { color: rgba(255,255,255,0.7); font-size: 0.9rem; transition: color var(--transition-speed) ease; }
        .footer-links a:hover { color: var(--accent1); }
        .footer-contact p { font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
        .footer-contact i { color: var(--accent1); width: 18px; text-align: center; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom i { margin-right: 4px; }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 40px;
            background: var(--accent1);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-speed) ease;
            text-decoration: none;
        }
        .btn-primary:hover { background: var(--accent2); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,106,51,0.3); }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 40px;
            background: transparent;
            color: var(--accent2);
            border: 2px solid var(--accent2);
            border-radius: var(--radius-btn);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-speed) ease;
            text-decoration: none;
        }
        .btn-secondary:hover { background: var(--accent2); color: #fff; }

        /* ===== Tags / Badges ===== */
        .tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--accent1);
            color: #fff;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .tag-outline {
            background: transparent;
            color: var(--accent1);
            border: 1px solid var(--accent1);
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media screen and (max-width: 640px) {
            .mobile-header { display: flex; }
            .nav-sidebar {
                transform: translateX(-100%);
                width: 280px;
                box-shadow: 4px 0 24px rgba(26,42,74,0.15);
            }
            .nav-sidebar.open { transform: translateX(0); }
            .main-content { margin-left: 0; padding-top: var(--header-height); }
            .container { padding: 0 16px; }
            .container-narrow { padding: 0 16px; }

            .page-header { padding: 24px 0 20px; margin-bottom: 24px; }
            .page-header h1 { font-size: 1.5rem; }

            .breadcrumb { font-size: 0.8rem; padding-top: 8px; }

            .article-body { font-size: 1rem; line-height: 1.7; }
            .article-body h2 { font-size: 1.35rem; }
            .article-body h3 { font-size: 1.1rem; }

            .article-meta { flex-direction: column; gap: 8px; font-size: 0.8rem; margin-bottom: 24px; }

            .related-grid { grid-template-columns: 1fr; gap: 16px; }
            .related-section h2 { font-size: 1.35rem; }

            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .site-footer { padding: 40px 0 0; margin-top: 48px; }
            .footer-desc { max-width: 100%; }

            .btn-primary, .btn-secondary { padding: 12px 28px; font-size: 0.9rem; width: 100%; justify-content: center; }

            .article-not-found { padding: 48px 16px; }
            .article-not-found i { font-size: 2rem; }
            .article-not-found p { font-size: 1rem; }
        }

        @media screen and (min-width: 641px) and (max-width: 1024px) {
            .page-header h1 { font-size: 1.8rem; }
            .article-body { font-size: 1.05rem; }
            .related-grid { gap: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mt-3 { margin-top: 3rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .fade-in { animation: fadeIn 0.5s ease forwards; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

        /* ===== Focus Styles ===== */
        a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent1); outline-offset: 2px; }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #D6E8F5;
            --accent-1: #FF6A33;
            --accent-2: #1A2A4A;
            --bg: #F5F8FB;
            --card-bg: #FFFFFF;
            --text-body: #2C3E50;
            --text-muted: #7A8BA0;
            --border-light: #E8F0F8;
            --border-input: #D6E8F5;
            --radius-card: 16px;
            --radius-btn: 24px;
            --radius-input: 12px;
            --shadow-card: 0 8px 20px rgba(26, 42, 74, 0.08);
            --shadow-card-hover: 0 12px 32px rgba(26, 42, 74, 0.16);
            --transition: 0.3s ease;
            --max-width: 1200px;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--accent-1);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-2);
        }
        a:focus-visible {
            outline: 2px solid var(--accent-1);
            outline-offset: 2px;
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            padding: 0;
            margin: 0;
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            margin: 0 0 0.5em;
            line-height: 1.3;
            color: var(--accent-2);
            font-weight: 700;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

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

        /* ===== 导航 (左侧 App Shell) ===== */
        .nav-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 240px;
            height: 100vh;
            background: var(--card-bg);
            border-right: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition);
        }

        .logo-area {
            padding: 28px 24px 20px;
            border-bottom: 1px solid var(--border-light);
        }

        .logo-area a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--accent-2);
            letter-spacing: -0.02em;
        }
        .logo-area a i {
            color: var(--accent-1);
            font-size: 22px;
        }
        .logo-area a:hover {
            color: var(--accent-2);
        }

        .nav-menu {
            flex: 1;
            padding: 16px 0;
        }

        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-left: 4px solid transparent;
            transition: all var(--transition);
        }
        .nav-menu li a i {
            width: 20px;
            text-align: center;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .nav-menu li a:hover {
            background: var(--bg);
            color: var(--accent-2);
        }
        .nav-menu li a:hover i {
            color: var(--accent-1);
        }
        .nav-menu li a.active {
            color: var(--accent-2);
            font-weight: 600;
            border-left-color: var(--accent-1);
            background: var(--bg);
        }
        .nav-menu li a.active i {
            color: var(--accent-1);
        }

        .nav-footer {
            padding: 16px 24px;
            font-size: 12px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            line-height: 1.5;
        }
        .nav-footer i {
            margin-right: 4px;
        }

        /* 移动端导航折叠 */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--card-bg);
            border-bottom: 1px solid var(--border-light);
            z-index: 1100;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
        }
        .nav-toggle .hamburger {
            background: none;
            border: none;
            font-size: 24px;
            color: var(--accent-2);
            cursor: pointer;
            padding: 8px;
        }
        .nav-toggle .logo-mobile {
            font-size: 17px;
            font-weight: 700;
            color: var(--accent-2);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-toggle .logo-mobile i {
            color: var(--accent-1);
        }

        .drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(26, 42, 74, 0.5);
            z-index: 1050;
        }
        .drawer-overlay.open {
            display: block;
        }

        .nav-sidebar.open {
            transform: translateX(0);
        }

        @media screen and (max-width: 640px) {
            .nav-sidebar {
                transform: translateX(-100%);
                width: 280px;
            }
            .nav-sidebar.open {
                transform: translateX(0);
            }
            .nav-toggle {
                display: flex;
            }
            body.has-mobile-nav {
                padding-top: 56px;
            }
            .logo-area {
                padding: 20px 20px 16px;
            }
            .nav-menu li a {
                padding: 10px 20px;
                font-size: 14px;
            }
            .nav-footer {
                padding: 12px 20px;
                font-size: 11px;
            }
        }

        @media screen and (min-width: 641px) and (max-width: 1024px) {
            .nav-sidebar {
                width: 200px;
            }
            .logo-area {
                padding: 24px 18px 16px;
            }
            .logo-area a {
                font-size: 16px;
            }
            .nav-menu li a {
                padding: 10px 18px;
                font-size: 14px;
            }
            .nav-footer {
                padding: 12px 18px;
            }
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: 240px;
            min-height: 100vh;
            background: var(--bg);
        }

        @media screen and (max-width: 640px) {
            .main-content {
                margin-left: 0;
            }
        }
        @media screen and (min-width: 641px) and (max-width: 1024px) {
            .main-content {
                margin-left: 200px;
            }
        }

        /* ===== 页面头部 ===== */
        .page-header {
            background: var(--primary);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
        .page-header::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 106, 51, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }
        .page-header .container {
            position: relative;
            z-index: 1;
        }
        .page-header h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--accent-2);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .page-header p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.6;
        }

        @media screen and (max-width: 640px) {
            .page-header {
                padding: 48px 0 40px;
            }
            .page-header h1 {
                font-size: 24px;
            }
            .page-header p {
                font-size: 15px;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            padding: 16px 0;
            font-size: 14px;
            color: var(--text-muted);
            background: var(--bg);
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--accent-1);
        }
        .breadcrumb .sep {
            margin: 0 8px;
            color: var(--text-muted);
        }
        .breadcrumb .current {
            color: var(--accent-2);
            font-weight: 500;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-2);
            margin-bottom: 12px;
        }
        .section-title p {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        @media screen and (max-width: 640px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                margin-bottom: 32px;
            }
            .section-title h2 {
                font-size: 22px;
            }
            .section-title p {
                font-size: 14px;
            }
        }

        /* ===== 核心优势 ===== */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .benefit-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: all var(--transition);
        }
        .benefit-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .benefit-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 28px;
            color: var(--accent-1);
        }
        .benefit-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .benefit-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        @media screen and (max-width: 640px) {
            .benefits-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .benefit-card {
                padding: 24px 20px;
            }
            .benefit-card h3 {
                font-size: 18px;
            }
        }
        @media screen and (min-width: 641px) and (max-width: 1024px) {
            .benefits-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        /* ===== 登录方式 ===== */
        .methods-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .method-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 32px;
            box-shadow: var(--shadow-card);
            display: flex;
            gap: 24px;
            align-items: flex-start;
            transition: all var(--transition);
        }
        .method-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .method-card .step-badge {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent-1);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
        }
        .method-card .content h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .method-card .content p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .method-card .content .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .method-card .content .tags span {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 12px;
            font-size: 12px;
            font-weight: 500;
            background: var(--primary);
            color: var(--accent-2);
        }

        @media screen and (max-width: 640px) {
            .methods-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .method-card {
                padding: 24px 20px;
                flex-direction: column;
                gap: 16px;
            }
            .method-card .step-badge {
                width: 40px;
                height: 40px;
                font-size: 17px;
            }
        }
        @media screen and (min-width: 641px) and (max-width: 1024px) {
            .methods-grid {
                gap: 24px;
            }
            .method-card {
                padding: 24px;
            }
        }

        /* ===== 适用场景 ===== */
        .scenes-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .scene-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: all var(--transition);
        }
        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .scene-card .emoji-icon {
            font-size: 40px;
            margin-bottom: 16px;
            display: block;
        }
        .scene-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .scene-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        @media screen and (max-width: 640px) {
            .scenes-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .scene-card {
                padding: 20px 16px;
            }
            .scene-card .emoji-icon {
                font-size: 32px;
            }
            .scene-card h3 {
                font-size: 15px;
            }
        }
        @media screen and (min-width: 641px) and (max-width: 1024px) {
            .scenes-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        /* ===== 详细步骤 ===== */
        .steps-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .step-item {
            display: flex;
            gap: 24px;
            padding: 24px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-item .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent-1);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
        }
        .step-item .step-content h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .step-item .step-content p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        @media screen and (max-width: 640px) {
            .step-item {
                gap: 16px;
                padding: 18px 0;
            }
            .step-item .step-num {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }
            .step-item .step-content h3 {
                font-size: 16px;
            }
            .step-item .step-content p {
                font-size: 14px;
            }
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            margin-bottom: 12px;
            overflow: hidden;
            border: 1px solid var(--border-light);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 17px;
            font-weight: 600;
            color: var(--accent-2);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--bg);
        }
        .faq-question .arrow {
            transition: transform var(--transition);
            color: var(--accent-1);
            font-size: 14px;
        }
        .faq-item.open .faq-question .arrow {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        @media screen and (max-width: 640px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 100%);
            padding: 80px 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-cta {
            display: inline-block;
            padding: 14px 48px;
            border-radius: var(--radius-btn);
            background: #fff;
            color: var(--accent-2);
            font-size: 17px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-2);
            color: #fff;
            transform: translateY(-2px);
        }

        @media screen and (max-width: 640px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .cta-section .btn-cta {
                padding: 12px 36px;
                font-size: 15px;
            }
        }

        /* ===== 返回首页 ===== */
        .back-home {
            text-align: center;
            padding: 40px 0 60px;
        }
        .back-home a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 500;
            color: var(--accent-2);
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            border: 2px solid var(--border-light);
            transition: all var(--transition);
        }
        .back-home a:hover {
            border-color: var(--accent-1);
            color: var(--accent-1);
            background: var(--bg);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--accent-2);
            color: rgba(255, 255, 255, 0.85);
            padding: 48px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }
        .footer-logo {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-logo i {
            color: var(--accent-1);
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.7);
            max-width: 360px;
        }
        .site-footer h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-1);
        }
        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-contact p i {
            width: 18px;
            color: var(--accent-1);
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom i {
            margin-right: 4px;
        }

        @media screen and (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-desc {
                max-width: 100%;
            }
            .site-footer {
                padding: 32px 0 0;
            }
        }
        @media screen and (min-width: 641px) and (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        /* ===== 通用工具 ===== */
        .text-center {
            text-align: center;
        }
        .mt-20 {
            margin-top: 20px;
        }
        .mb-20 {
            margin-bottom: 20px;
        }
        .img-cover {
            object-fit: cover;
            width: 100%;
            height: 100%;
        }

        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: var(--max-width);
        }
        .grid-x>.cell {
            padding: 0;
        }
        .grid-margin-x>.cell {
            padding: 0 12px;
        }

        /* ===== 图片区块 ===== */
        .image-block {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            margin: 24px 0;
        }
        .image-block img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* ===== 装饰分割 ===== */
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--accent-1);
            border-radius: 2px;
            margin: 0 auto 20px;
        }

        /* ===== 按钮通用 ===== */
        .btn-primary {
            display: inline-block;
            padding: 14px 40px;
            border-radius: var(--radius-btn);
            background: var(--accent-1);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-primary:hover {
            background: var(--accent-2);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        /* ===== 响应式微调 ===== */
        @media screen and (max-width: 520px) {
            .scenes-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .page-header h1 {
                font-size: 22px;
            }
            .section-title h2 {
                font-size: 20px;
            }
            .benefit-card {
                padding: 20px 16px;
            }
            .method-card {
                padding: 20px 16px;
            }
        }