/* roulang page: index */
:root {
  --color-primary: #3A8FD6;
  --color-primary-light: #E5F0FC;
  --color-accent: #F5B342;
  --color-dark: #152B4C;
  --color-bg-light: #F0F4F8;
  --color-white: #FFFFFF;
  --color-text: #1A1F2E;
  --color-text-muted: #6B7A8F;
  --color-border: #D0D7E2;
  --color-divider: #E8ECF0;
  --color-nav-text: #B0C0D0;
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-card: 0 4px 20px rgba(21,43,76,0.06);
  --shadow-card-hover: 0 8px 32px rgba(21,43,76,0.12);
  --shadow-focus: 0 0 0 3px rgba(58,143,214,0.15);
  --transition: 0.25s ease;
  --sidebar-width: 240px;
  --max-content: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font-family); color: var(--color-text); background: var(--color-white); line-height: 1.6; overflow-x: hidden; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: #2a7bc4; }
a:focus-visible { outline: 2px solid var(--color-primary); 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; }
.container { max-width: var(--max-content); margin: 0 auto; padding: 0 20px; }
.section-padding { padding: 4rem 0; }
@media (max-width: 640px) { .section-padding { padding: 2.5rem 0; } }

/* App Shell Layout */
.app-wrapper { display: flex; min-height: 100vh; }
.app-sidebar { position: fixed; left: 0; top: 0; width: var(--sidebar-width); height: 100vh; background: var(--color-dark); display: flex; flex-direction: column; z-index: 100; overflow-y: auto; }
.sidebar-logo { height: 72px; display: flex; align-items: center; padding: 0 20px; border-bottom: 1px solid rgba(255,255,255,0.06); flex-shrink: 0; }
.sidebar-logo a { display: flex; align-items: center; gap: 10px; color: var(--color-white); font-size: 1.2rem; font-weight: 700; letter-spacing: 0.5px; }
.sidebar-logo a i { font-size: 1.4rem; color: var(--color-accent); }
.sidebar-logo a:hover { color: var(--color-white); }
.sidebar-nav { flex: 1; padding: 20px 0; }
.sidebar-nav ul { margin: 0; padding: 0; }
.sidebar-nav li { margin: 0; }
.sidebar-nav a { display: flex; align-items: center; gap: 12px; padding: 12px 20px; color: var(--color-nav-text); font-size: 0.95rem; font-weight: 500; border-left: 3px solid transparent; transition: all var(--transition); }
.sidebar-nav a i { width: 20px; text-align: center; font-size: 1rem; }
.sidebar-nav a:hover { color: var(--color-white); background: rgba(255,255,255,0.04); border-left-color: var(--color-primary); }
.sidebar-nav a.active { color: var(--color-white); background: rgba(255,255,255,0.06); border-left-color: var(--color-primary); }
.sidebar-nav a.active i { color: var(--color-primary); }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.06); flex-shrink: 0; }
.sidebar-footer p { color: var(--color-nav-text); font-size: 0.75rem; opacity: 0.7; margin: 0; }
.app-main { margin-left: var(--sidebar-width); flex: 1; min-height: 100vh; background: var(--color-white); }

/* Mobile Topbar */
.mobile-topbar { display: none; position: fixed; top: 0; left: 0; right: 0; height: 60px; background: var(--color-dark); z-index: 200; padding: 0 16px; align-items: center; justify-content: space-between; }
.mobile-topbar .logo { display: flex; align-items: center; gap: 8px; color: var(--color-white); font-size: 1.1rem; font-weight: 700; }
.mobile-topbar .logo i { color: var(--color-accent); }
.mobile-hamburger { background: none; border: none; color: var(--color-white); font-size: 1.5rem; padding: 8px; cursor: pointer; }
.mobile-drawer-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 300; }
.mobile-drawer { position: fixed; left: -280px; top: 0; bottom: 0; width: 280px; background: var(--color-dark); z-index: 400; overflow-y: auto; transition: left 0.3s ease; padding-top: 60px; }
.mobile-drawer.open { left: 0; }
.mobile-drawer .drawer-logo { padding: 16px 20px; border-bottom: 1px solid rgba(255,255,255,0.06); display: flex; align-items: center; gap: 10px; color: var(--color-white); font-size: 1.1rem; font-weight: 700; }
.mobile-drawer .drawer-logo i { color: var(--color-accent); }
.mobile-drawer ul { margin: 0; padding: 12px 0; }
.mobile-drawer li { margin: 0; }
.mobile-drawer a { display: flex; align-items: center; gap: 12px; padding: 14px 20px; color: var(--color-nav-text); font-size: 0.95rem; font-weight: 500; border-left: 3px solid transparent; }
.mobile-drawer a i { width: 20px; text-align: center; }
.mobile-drawer a:hover { color: var(--color-white); background: rgba(255,255,255,0.04); border-left-color: var(--color-primary); }
.mobile-drawer a.active { color: var(--color-white); background: rgba(255,255,255,0.06); border-left-color: var(--color-primary); }
.mobile-drawer .drawer-footer { padding: 20px; border-top: 1px solid rgba(255,255,255,0.06); color: var(--color-nav-text); font-size: 0.75rem; opacity: 0.7; }
@media (max-width: 1024px) {
  .app-sidebar { display: none; }
  .mobile-topbar { display: flex; }
  .app-main { margin-left: 0; padding-top: 60px; }
  .mobile-drawer-overlay.active { display: block; }
}

/* Hero */
.hero-section { position: relative; min-height: 70vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, rgba(21,43,76,0.7) 0%, rgba(21,43,76,0.4) 100%), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat; padding: 60px 20px; text-align: center; }
.hero-section .hero-content { position: relative; z-index: 2; max-width: 900px; width: 100%; }
.hero-section h1 { color: var(--color-white); font-size: 3rem; font-weight: 700; line-height: 1.2; margin-bottom: 16px; letter-spacing: 1px; }
.hero-section .hero-sub { color: rgba(255,255,255,0.9); font-size: 1.2rem; line-height: 1.5; margin-bottom: 40px; max-width: 640px; margin-left: auto; margin-right: auto; }
.hero-section .hero-badge { display: inline-block; background: rgba(245,179,66,0.2); color: var(--color-accent); padding: 6px 18px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: 20px; letter-spacing: 0.5px; border: 1px solid rgba(245,179,66,0.3); }
.countdown-wrap { display: flex; justify-content: center; gap: 24px; margin-bottom: 40px; flex-wrap: wrap; }
.countdown-item { display: flex; flex-direction: column; align-items: center; }
.countdown-item .num { font-size: 3rem; font-weight: 700; color: var(--color-accent); line-height: 1; }
.countdown-item .label { font-size: 0.875rem; color: rgba(255,255,255,0.75); margin-top: 6px; letter-spacing: 1px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-cta .btn-primary { background: var(--color-accent); color: var(--color-white); border: none; padding: 14px 40px; border-radius: var(--radius-md); font-size: 1rem; font-weight: 600; cursor: pointer; transition: filter var(--transition); }
.hero-cta .btn-primary:hover { filter: brightness(1.12); }
.hero-cta .btn-secondary { background: transparent; color: var(--color-white); border: 2px solid var(--color-primary); padding: 12px 36px; border-radius: var(--radius-md); font-size: 1rem; font-weight: 600; cursor: pointer; transition: background var(--transition); }
.hero-cta .btn-secondary:hover { background: rgba(58,143,214,0.15); }
@media (max-width: 640px) {
  .hero-section { min-height: 50vh; padding: 40px 16px; }
  .hero-section h1 { font-size: 2rem; }
  .hero-section .hero-sub { font-size: 1rem; }
  .countdown-item .num { font-size: 2rem; }
  .countdown-wrap { gap: 16px; }
}

/* Section Titles */
.section-title { font-size: 2rem; font-weight: 700; color: var(--color-dark); margin-bottom: 0.5rem; }
.section-subtitle { font-size: 1.05rem; color: var(--color-text-muted); margin-bottom: 2.5rem; max-width: 600px; }
.section-header { text-align: center; margin-bottom: 3rem; }
.section-header .section-title { margin-bottom: 0.5rem; }
.section-header .section-subtitle { margin: 0 auto; }

/* Highlights Grid */
.highlights-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.highlight-card { background: var(--color-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); transition: all var(--transition); overflow: hidden; }
.highlight-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }
.highlight-card .card-img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.highlight-card .card-body { padding: 20px; }
.highlight-card .card-body h3 { font-size: 1.125rem; font-weight: 600; margin-bottom: 8px; color: var(--color-dark); }
.highlight-card .card-body p { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.highlight-card .card-icon { width: 48px; height: 48px; border-radius: var(--radius-sm); background: var(--color-primary-light); display: flex; align-items: center; justify-content: center; margin-bottom: 12px; color: var(--color-primary); font-size: 1.4rem; }
@media (max-width: 1024px) { .highlights-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .highlights-grid { grid-template-columns: 1fr; gap: 16px; } }

/* CTA Subscribe */
.cta-subscribe { background: var(--color-bg-light); padding: 4rem 0; text-align: center; }
.cta-subscribe .cta-title { font-size: 2rem; font-weight: 700; color: var(--color-dark); margin-bottom: 8px; }
.cta-subscribe .cta-desc { font-size: 1.05rem; color: var(--color-text-muted); margin-bottom: 32px; }
.cta-subscribe .cta-form { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; max-width: 500px; margin: 0 auto; }
.cta-subscribe .cta-form input[type="email"] { flex: 1; min-width: 200px; height: 48px; border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 0 16px; font-size: 0.95rem; outline: none; transition: border var(--transition), box-shadow var(--transition); }
.cta-subscribe .cta-form input[type="email"]:focus { border-color: var(--color-primary); box-shadow: var(--shadow-focus); }
.cta-subscribe .cta-form button { height: 48px; background: var(--color-accent); color: var(--color-white); border: none; padding: 0 36px; border-radius: var(--radius-md); font-size: 1rem; font-weight: 600; cursor: pointer; transition: filter var(--transition); white-space: nowrap; }
.cta-subscribe .cta-form button:hover { filter: brightness(1.12); }
.cta-subscribe .cta-alt { margin-top: 16px; }
.cta-subscribe .cta-alt a { color: var(--color-primary); font-size: 0.9rem; font-weight: 500; }
.cta-subscribe .cta-alt a:hover { text-decoration: underline; }
@media (max-width: 640px) { .cta-subscribe .cta-title { font-size: 1.5rem; } }

/* Replays */
.replays-section { padding: 4rem 0; }
.replays-scroll { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.replay-card { background: var(--color-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-card); overflow: hidden; transition: all var(--transition); }
.replay-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }
.replay-card .card-img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.replay-card .card-body { padding: 16px 20px 20px; }
.replay-card .card-body .replay-date { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 4px; }
.replay-card .card-body h3 { font-size: 1rem; font-weight: 600; margin-bottom: 12px; color: var(--color-dark); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.replay-card .card-body .replay-link { color: var(--color-primary); font-size: 0.875rem; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; }
.replay-card .card-body .replay-link:hover { text-decoration: underline; }
@media (max-width: 1024px) { .replays-scroll { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .replays-scroll { grid-template-columns: 1fr; gap: 16px; } }

/* CMS News List */
.news-section { padding: 4rem 0; background: var(--color-bg-light); }
.news-list { max-width: 860px; margin: 0 auto; }
.news-item { background: var(--color-white); border-radius: var(--radius-md); padding: 16px 20px; margin-bottom: 12px; box-shadow: var(--shadow-card); transition: all var(--transition); }
.news-item:hover { box-shadow: var(--shadow-card-hover); }
.news-item .news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; flex-wrap: wrap; }
.news-item .news-tag { display: inline-block; background: var(--color-primary-light); color: var(--color-primary); font-size: 0.75rem; font-weight: 600; padding: 2px 12px; border-radius: 10px; }
.news-item .news-time { font-size: 0.8rem; color: var(--color-text-muted); }
.news-item h3 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.news-item h3 a { color: var(--color-dark); }
.news-item h3 a:hover { color: var(--color-primary); }
.news-item .news-summary { font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-empty { text-align: center; padding: 40px 20px; background: var(--color-white); border-radius: var(--radius-md); color: var(--color-text-muted); font-size: 0.95rem; }
@media (max-width: 640px) { .news-item { padding: 12px 16px; } }

/* FAQ */
.faq-section { padding: 4rem 0; }
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-divider); padding: 8px 0; }
.faq-question { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; cursor: pointer; font-size: 1rem; font-weight: 600; color: var(--color-dark); background: none; border: none; width: 100%; text-align: left; gap: 12px; transition: color var(--transition); }
.faq-question:hover { color: var(--color-primary); }
.faq-question .faq-icon { font-size: 0.85rem; color: var(--color-text-muted); transition: transform var(--transition); flex-shrink: 0; }
.faq-item.open .faq-question .faq-icon { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease, padding 0.3s ease; padding: 0 0; }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 0 16px 0; }
.faq-answer p { font-size: 0.925rem; color: #4A5A72; line-height: 1.7; margin: 0; }

/* Bottom CTA */
.bottom-cta { background: var(--color-dark); padding: 4rem 0; text-align: center; }
.bottom-cta h2 { color: var(--color-white); font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.bottom-cta p { color: var(--color-nav-text); font-size: 1.05rem; margin-bottom: 32px; max-width: 520px; margin-left: auto; margin-right: auto; }
.bottom-cta .btn-primary { background: var(--color-accent); color: var(--color-white); border: none; padding: 14px 48px; border-radius: var(--radius-md); font-size: 1rem; font-weight: 600; cursor: pointer; transition: filter var(--transition); display: inline-block; }
.bottom-cta .btn-primary:hover { filter: brightness(1.12); }
@media (max-width: 640px) { .bottom-cta h2 { font-size: 1.5rem; } }

/* Footer */
.site-footer { background: var(--color-dark); padding: 3rem 0 2rem; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 32px; }
.footer-brand { flex: 1; min-width: 240px; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; color: var(--color-white); font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.footer-brand .footer-logo i { color: var(--color-accent); }
.footer-brand p { color: var(--color-nav-text); font-size: 0.85rem; line-height: 1.6; max-width: 320px; margin: 0; }
.footer-right { text-align: right; }
.footer-right p { color: var(--color-nav-text); font-size: 0.8rem; margin: 0 0 4px; }
.footer-right .copyright { opacity: 0.7; }
@media (max-width: 640px) {
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-brand { min-width: 100%; }
  .footer-brand p { max-width: 100%; }
  .footer-right { text-align: center; width: 100%; }
}

/* Utility */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* Foundation Overrides */
.grid-container { max-width: var(--max-content); padding-left: 20px; padding-right: 20px; }

/* roulang page: article */
:root {
            --color-primary: #3A8FD6;
            --color-secondary: #F5B342;
            --color-dark: #152B4C;
            --color-light-bg: #F0F4F8;
            --color-white: #FFFFFF;
            --color-text: #1A1F2E;
            --color-text-light: #6B7A8F;
            --color-text-muted: #8A96A8;
            --color-border: #E8ECF0;
            --color-input-border: #D0D7E2;
            --color-nav-hover: #3A8FD6;
            --color-nav-text: #B0C0D0;
            --radius-small: 6px;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-large: 16px;
            --shadow-card: 0 4px 20px rgba(21,43,76,0.06);
            --shadow-card-hover: 0 8px 32px rgba(21,43,76,0.12);
            --transition-default: all 0.3s ease;
            --font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { font-size: 16px; scroll-behavior: smooth; }
        body {
            font-family: var(--font-family);
            color: var(--color-text);
            background: var(--color-white);
            line-height: 1.6;
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--color-primary); text-decoration: none; transition: var(--transition-default); }
        a:hover { color: #2b7ac4; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--color-text); }
        h1 { font-size: 2rem; }
        h2 { font-size: 1.5rem; }
        h3 { font-size: 1.125rem; }
        h4 { font-size: 1rem; }
        p { margin-bottom: 1rem; color: var(--color-text); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }

        /* ===== 左侧导航 (App Shell) ===== */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 240px;
            height: 100vh;
            background: var(--color-dark);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: var(--transition-default);
        }
        .sidebar-logo {
            height: 72px;
            display: flex;
            align-items: center;
            padding: 0 24px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .sidebar-logo a {
            color: var(--color-white);
            font-size: 1.25rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.5px;
        }
        .sidebar-logo a i { color: var(--color-primary); font-size: 1.4rem; }
        .sidebar-logo a:hover { color: var(--color-white); opacity: 0.9; }
        .sidebar-nav { flex: 1; padding: 16px 0; overflow-y: auto; }
        .sidebar-nav ul { display: flex; flex-direction: column; gap: 4px; padding: 0 12px; }
        .sidebar-nav li { margin: 0; }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-small);
            color: var(--color-nav-text);
            font-size: 0.95rem;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: var(--transition-default);
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 1.1rem; color: rgba(176,192,208,0.6); }
        .sidebar-nav a:hover {
            background: rgba(58,143,214,0.1);
            color: var(--color-white);
            border-left-color: var(--color-primary);
        }
        .sidebar-nav a:hover i { color: var(--color-primary); }
        .sidebar-nav a.active {
            background: rgba(58,143,214,0.15);
            color: var(--color-white);
            border-left-color: var(--color-primary);
        }
        .sidebar-nav a.active i { color: var(--color-primary); }
        .sidebar-footer {
            padding: 16px 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
            text-align: left;
        }
        .sidebar-footer p {
            color: var(--color-nav-text);
            font-size: 0.75rem;
            margin: 0;
            line-height: 1.5;
            opacity: 0.7;
        }
        .sidebar-footer a { color: var(--color-nav-text); }
        .sidebar-footer a:hover { color: var(--color-white); }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: 240px;
            flex: 1;
            min-height: 100vh;
            background: var(--color-white);
            display: flex;
            flex-direction: column;
        }
        .main-inner { flex: 1; padding: 40px 48px 60px; max-width: 960px; width: 100%; margin: 0 auto; }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--color-text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--color-text-muted); }
        .breadcrumb a:hover { color: var(--color-primary); }
        .breadcrumb .sep { color: #C8D0DC; }
        .breadcrumb .current { color: var(--color-text-light); font-weight: 500; max-width: 240px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

        /* ===== 文章头部 ===== */
        .article-header { margin-bottom: 32px; }
        .article-header .article-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 16px;
            font-size: 0.875rem;
            color: var(--color-text-light);
        }
        .article-header .article-meta .category-badge {
            display: inline-block;
            background: #E5F0FC;
            color: var(--color-primary);
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .article-header .article-meta .date { color: var(--color-text-muted); }
        .article-header .article-meta .author { color: var(--color-text-light); }
        .article-header h1 {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.35;
            color: var(--color-text);
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }

        /* ===== 正文区 ===== */
        #article-content {
            max-width: 760px;
            width: 100%;
            margin: 0 auto 48px;
            font-size: 1rem;
            line-height: 1.8;
            color: var(--color-text);
        }
        #article-content p { margin-bottom: 1.5rem; }
        #article-content h2 { font-size: 1.5rem; margin-top: 2.5rem; margin-bottom: 1rem; padding-bottom: 8px; border-bottom: 2px solid var(--color-border); }
        #article-content h3 { font-size: 1.25rem; margin-top: 2rem; margin-bottom: 0.75rem; }
        #article-content h4 { font-size: 1.1rem; margin-top: 1.5rem; margin-bottom: 0.5rem; }
        #article-content img { width: 100%; border-radius: var(--radius-card); margin: 1.5rem 0; box-shadow: var(--shadow-card); }
        #article-content blockquote {
            border-left: 3px solid var(--color-primary);
            padding: 16px 20px;
            margin: 1.5rem 0;
            background: var(--color-light-bg);
            border-radius: 0 var(--radius-small) var(--radius-small) 0;
            color: var(--color-text-light);
            font-style: normal;
        }
        #article-content blockquote p { margin-bottom: 0; }
        #article-content pre, #article-content code {
            background: #F5F7FA;
            border-radius: var(--radius-small);
            padding: 2px 8px;
            font-family: 'SF Mono', 'Fira Code', monospace;
            font-size: 0.9em;
            color: #2d3748;
        }
        #article-content pre { padding: 16px 20px; overflow-x: auto; margin: 1.5rem 0; }
        #article-content pre code { padding: 0; background: transparent; }
        #article-content ul, #article-content ol { margin: 1rem 0 1.5rem 1.5rem; }
        #article-content ul li { list-style: disc; margin-bottom: 0.5rem; }
        #article-content ol li { list-style: decimal; margin-bottom: 0.5rem; }
        #article-content a { color: var(--color-primary); text-decoration: underline; }
        #article-content a:hover { color: #2b7ac4; }

        /* ===== 文章未找到 ===== */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            color: var(--color-text-light);
        }
        .article-not-found i { font-size: 3rem; color: var(--color-text-muted); margin-bottom: 16px; }
        .article-not-found h2 { font-size: 1.5rem; margin-bottom: 12px; }
        .article-not-found p { color: var(--color-text-muted); }
        .article-not-found a { color: var(--color-primary); font-weight: 500; }

        /* ===== 相关推荐 ===== */
        .related-section { margin-top: 48px; padding-top: 40px; border-top: 1px solid var(--color-border); }
        .related-section h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 24px;
            color: var(--color-text);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--color-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-default);
            border: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
        .related-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            background: var(--color-light-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; }
        .related-card .card-body { padding: 16px 20px 20px; flex: 1; display: flex; flex-direction: column; }
        .related-card .card-body .card-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .card-title a { color: var(--color-text); }
        .related-card .card-body .card-title a:hover { color: var(--color-primary); }
        .related-card .card-body .card-date {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            margin-top: auto;
        }
        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 32px;
            font-size: 0.95rem;
            color: var(--color-primary);
            font-weight: 500;
            transition: var(--transition-default);
        }
        .back-link:hover { color: #2b7ac4; gap: 10px; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-dark);
            padding: 40px 0 32px;
            margin-left: 240px;
        }
        .site-footer .footer-inner {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 40px;
            flex-wrap: wrap;
        }
        .site-footer .footer-brand { max-width: 400px; }
        .site-footer .footer-logo {
            color: var(--color-white);
            font-size: 1.1rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .site-footer .footer-logo i { color: var(--color-primary); }
        .site-footer .footer-brand p { color: var(--color-nav-text); font-size: 0.875rem; line-height: 1.7; margin: 0; opacity: 0.8; }
        .site-footer .footer-right { text-align: right; }
        .site-footer .footer-right p { color: var(--color-nav-text); font-size: 0.8rem; margin: 0 0 4px; opacity: 0.7; }
        .site-footer .footer-right .copyright a { color: var(--color-nav-text); }
        .site-footer .footer-right .copyright a:hover { color: var(--color-white); }

        /* ===== 移动端导航 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--color-dark);
            z-index: 1100;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-header .mobile-logo { color: var(--color-white); font-weight: 700; font-size: 1.1rem; display: flex; align-items: center; gap: 8px; }
        .mobile-header .mobile-logo i { color: var(--color-primary); }
        .mobile-header .hamburger { background: none; border: none; color: var(--color-white); font-size: 1.5rem; cursor: pointer; padding: 8px; }
        .drawer-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.5);
            z-index: 1050;
        }
        .drawer-overlay.active { display: block; }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 1024px) {
            .app-sidebar { display: none; }
            .mobile-header { display: flex; }
            .main-content { margin-left: 0; padding-top: 60px; }
            .main-inner { padding: 32px 24px 48px; }
            .site-footer { margin-left: 0; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-header h1 { font-size: 1.75rem; }
        }
        @media screen and (max-width: 768px) {
            .main-inner { padding: 24px 16px 40px; }
            .related-grid { grid-template-columns: 1fr; }
            .article-header h1 { font-size: 1.5rem; }
            #article-content { font-size: 0.95rem; }
            .site-footer .footer-inner { flex-direction: column; align-items: center; text-align: center; }
            .site-footer .footer-right { text-align: center; }
            .site-footer .footer-brand { max-width: 100%; }
            .breadcrumb .current { max-width: 160px; }
        }
        @media screen and (max-width: 520px) {
            .main-inner { padding: 20px 12px 32px; }
            .article-header h1 { font-size: 1.35rem; }
            .article-header .article-meta { font-size: 0.8rem; gap: 8px; }
            #article-content { font-size: 0.9rem; line-height: 1.7; }
            .related-card .card-body { padding: 12px 16px 16px; }
            .related-card .card-body .card-title { font-size: 0.95rem; }
        }

        /* ===== 抽屉菜单 (移动端) ===== */
        .drawer-menu {
            position: fixed;
            top: 0;
            left: -300px;
            width: 280px;
            height: 100vh;
            background: var(--color-dark);
            z-index: 1150;
            transition: left 0.3s ease;
            display: flex;
            flex-direction: column;
            padding: 20px 0;
        }
        .drawer-menu.open { left: 0; }
        .drawer-menu .drawer-logo {
            padding: 0 20px 16px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-white);
            font-size: 1.1rem;
            font-weight: 700;
        }
        .drawer-menu .drawer-logo i { color: var(--color-primary); }
        .drawer-menu .drawer-close {
            position: absolute;
            top: 16px;
            right: 16px;
            background: none;
            border: none;
            color: var(--color-nav-text);
            font-size: 1.4rem;
            cursor: pointer;
        }
        .drawer-menu ul { padding: 0 16px; display: flex; flex-direction: column; gap: 4px; }
        .drawer-menu ul li { margin: 0; }
        .drawer-menu ul a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-small);
            color: var(--color-nav-text);
            font-size: 0.95rem;
            font-weight: 500;
            border-left: 3px solid transparent;
        }
        .drawer-menu ul a i { width: 20px; text-align: center; color: rgba(176,192,208,0.6); }
        .drawer-menu ul a:hover { background: rgba(58,143,214,0.1); color: var(--color-white); border-left-color: var(--color-primary); }
        .drawer-menu ul a.active { background: rgba(58,143,214,0.15); color: var(--color-white); border-left-color: var(--color-primary); }
        .drawer-menu .drawer-footer {
            margin-top: auto;
            padding: 20px 24px;
            border-top: 1px solid rgba(255,255,255,0.06);
            text-align: left;
        }
        .drawer-menu .drawer-footer p { color: var(--color-nav-text); font-size: 0.75rem; margin: 0; opacity: 0.7; }

/* roulang page: category1 */
:root {
            --color-primary: #3A8FD6;
            --color-accent: #F5B342;
            --color-dark: #152B4C;
            --color-bg-light: #F0F4F8;
            --color-white: #FFFFFF;
            --color-text: #1A1F2E;
            --color-text-light: #6B7A8F;
            --color-border: #E8ECF0;
            --color-nav-text: #B0C0D0;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --shadow-card: 0 4px 20px rgba(21, 43, 76, 0.06);
            --shadow-card-hover: 0 8px 32px rgba(21, 43, 76, 0.12);
            --shadow-btn: 0 2px 8px rgba(245, 179, 66, 0.3);
            --transition: all 0.3s ease;
            --max-width: 1200px;
            --sidebar-width: 240px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", Arial, sans-serif;
            color: var(--color-text);
            background: var(--color-white);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: #2a7bc5;
        }
        a:focus-visible {
            outline: 3px solid rgba(58, 143, 214, 0.4);
            outline-offset: 2px;
        }

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

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

        /* ===== Sidebar Navigation ===== */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-dark);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            overflow-y: auto;
        }

        .sidebar-logo {
            height: 72px;
            display: flex;
            align-items: center;
            padding: 0 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-white);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.5px;
        }
        .sidebar-logo a i {
            color: var(--color-accent);
            font-size: 1.3rem;
        }
        .sidebar-logo a:hover {
            color: var(--color-accent);
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 0;
        }
        .sidebar-nav ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .sidebar-nav ul li {
            padding: 0 12px;
            margin-bottom: 4px;
        }
        .sidebar-nav ul li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: var(--color-nav-text);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            border-left: 3px solid transparent;
        }
        .sidebar-nav ul li a i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            color: rgba(176, 192, 208, 0.7);
        }
        .sidebar-nav ul li a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-white);
            border-left-color: var(--color-primary);
        }
        .sidebar-nav ul li a.active {
            background: rgba(58, 143, 214, 0.15);
            color: var(--color-white);
            border-left-color: var(--color-primary);
        }
        .sidebar-nav ul li a.active i {
            color: var(--color-primary);
        }

        .sidebar-footer {
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            flex-shrink: 0;
        }
        .sidebar-footer p {
            font-size: 0.75rem;
            color: var(--color-nav-text);
            line-height: 1.5;
            opacity: 0.7;
        }

        /* ===== Main Content ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            background: var(--color-white);
        }

        /* ===== Page Header ===== */
        .page-header {
            background: var(--color-dark);
            padding: 80px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .page-header::after {
            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-header .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-header h1 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .page-header p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ===== Section通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--color-text);
            text-align: center;
        }
        .section-sub {
            text-align: center;
            color: var(--color-text-light);
            font-size: 1rem;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section.bg-light {
            background: var(--color-bg-light);
        }

        /* ===== 左图右文 ===== */
        .img-text-row {
            display: flex;
            align-items: center;
            gap: 60px;
        }
        .img-text-row .img-col {
            flex: 0 0 48%;
        }
        .img-text-row .text-col {
            flex: 1;
        }
        .img-text-row .text-col h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--color-text);
        }
        .img-text-row .text-col p {
            color: var(--color-text-light);
            line-height: 1.8;
            margin-bottom: 16px;
            font-size: 0.95rem;
        }
        .img-text-row .text-col .highlight-list {
            list-style: none;
            padding: 0;
            margin: 20px 0 0;
        }
        .img-text-row .text-col .highlight-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 8px 0;
            font-size: 0.95rem;
            color: var(--color-text);
        }
        .img-text-row .text-col .highlight-list li i {
            color: var(--color-accent);
            font-size: 1.1rem;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .img-wrapper {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .img-wrapper img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* ===== 核心能力卡片 ===== */
        .capabilities-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .cap-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid rgba(232, 236, 240, 0.5);
        }
        .cap-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .cap-card .icon {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: rgba(58, 143, 214, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            color: var(--color-primary);
        }
        .cap-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--color-text);
        }
        .cap-card p {
            font-size: 0.875rem;
            color: var(--color-text-light);
            line-height: 1.6;
        }

        /* ===== 适用场景 ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scenario-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 28px 24px 32px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            border: 1px solid rgba(232, 236, 240, 0.5);
            position: relative;
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .scenario-card .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(58, 143, 214, 0.1);
            color: var(--color-primary);
            margin-bottom: 14px;
        }
        .scenario-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--color-text);
        }
        .scenario-card p {
            font-size: 0.9rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(to right, var(--color-primary), var(--color-accent));
            opacity: 0.25;
            z-index: 0;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 8px;
        }
        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-white);
            font-size: 1.3rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            box-shadow: 0 4px 14px rgba(58, 143, 214, 0.25);
        }
        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--color-text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: 18px 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            padding: 4px 0;
            user-select: none;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--color-text-light);
            font-size: 0.9rem;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 0;
            color: var(--color-text-light);
            font-size: 0.925rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 12px 0 4px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-dark);
            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.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 540px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-block;
            padding: 14px 40px;
            background: var(--color-accent);
            color: var(--color-white);
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-md);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-btn);
            text-decoration: none;
        }
        .btn-primary:hover {
            background: #e8a83a;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 179, 66, 0.4);
            color: var(--color-white);
        }
        .btn-secondary {
            display: inline-block;
            padding: 14px 40px;
            background: transparent;
            color: var(--color-white);
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-md);
            border: 2px solid rgba(255, 255, 255, 0.3);
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-secondary:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background: rgba(245, 179, 66, 0.08);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-dark);
            padding: 48px 0 36px;
        }
        .footer-inner {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 40px;
        }
        .footer-brand {
            max-width: 380px;
        }
        .footer-logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-white);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-logo i {
            color: var(--color-accent);
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--color-nav-text);
            line-height: 1.7;
            opacity: 0.8;
        }
        .footer-right {
            text-align: right;
            flex-shrink: 0;
        }
        .footer-right p {
            font-size: 0.8rem;
            color: var(--color-nav-text);
            line-height: 1.7;
            opacity: 0.7;
        }
        .footer-right .copyright {
            margin-top: 4px;
        }
        .footer-right a {
            color: var(--color-nav-text);
            text-decoration: underline;
            opacity: 0.8;
        }
        .footer-right a:hover {
            color: var(--color-accent);
            opacity: 1;
        }

        /* ===== Mobile Top Bar ===== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--color-dark);
            z-index: 1100;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-topbar .logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-white);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .logo i {
            color: var(--color-accent);
        }
        .hamburger {
            background: none;
            border: none;
            color: var(--color-white);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
        }
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1050;
        }
        .drawer-overlay.open {
            display: block;
        }

        /* ===== Mobile Drawer ===== */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: -300px;
            width: 280px;
            height: 100vh;
            background: var(--color-dark);
            z-index: 1060;
            transition: left 0.35s ease;
            padding: 24px 20px;
            overflow-y: auto;
        }
        .mobile-drawer.open {
            left: 0;
        }
        .mobile-drawer .drawer-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 32px;
        }
        .mobile-drawer .drawer-header .logo {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-white);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-drawer .drawer-header .logo i {
            color: var(--color-accent);
        }
        .mobile-drawer .close-btn {
            background: none;
            border: none;
            color: var(--color-nav-text);
            font-size: 1.4rem;
            cursor: pointer;
        }
        .mobile-drawer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .mobile-drawer ul li {
            margin-bottom: 4px;
        }
        .mobile-drawer ul li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            color: var(--color-nav-text);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            border-left: 3px solid transparent;
        }
        .mobile-drawer ul li a i {
            width: 20px;
            text-align: center;
            color: rgba(176, 192, 208, 0.7);
        }
        .mobile-drawer ul li a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-white);
        }
        .mobile-drawer ul li a.active {
            background: rgba(58, 143, 214, 0.15);
            color: var(--color-white);
            border-left-color: var(--color-primary);
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .capabilities-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 16px;
            }
            .steps-grid::before {
                display: none;
            }
            .scenarios-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .img-text-row {
                gap: 36px;
                flex-direction: column;
            }
            .img-text-row .img-col {
                flex: 0 0 100%;
            }
            .page-header h1 {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .footer-right {
                text-align: center;
            }
        }

        @media screen and (max-width: 768px) {
            .app-sidebar {
                display: none;
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 64px;
            }
            .page-header {
                padding: 56px 0 48px;
            }
            .page-header h1 {
                font-size: 1.7rem;
            }
            .page-header p {
                font-size: 0.95rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .section-sub {
                font-size: 0.9rem;
                margin-bottom: 32px;
            }
            .capabilities-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .cap-card {
                padding: 24px 16px;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .step-item {
                display: flex;
                align-items: center;
                gap: 20px;
                text-align: left;
            }
            .step-num {
                margin: 0;
                flex-shrink: 0;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                max-width: 300px;
                text-align: center;
            }
            .img-text-row .text-col h2 {
                font-size: 1.4rem;
            }
        }

        @media screen and (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-header h1 {
                font-size: 1.4rem;
            }
            .section-title {
                font-size: 1.25rem;
            }
            .capabilities-grid {
                grid-template-columns: 1fr;
            }
            .cap-card .icon {
                width: 52px;
                height: 52px;
                font-size: 1.3rem;
            }
        }

        /* ===== Scrollbar ===== */
        .app-sidebar::-webkit-scrollbar {
            width: 4px;
        }
        .app-sidebar::-webkit-scrollbar-track {
            background: transparent;
        }
        .app-sidebar::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.15);
            border-radius: 4px;
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 16px;
        }
        .mb-1 {
            margin-bottom: 16px;
        }

/* roulang page: category2 */
/* =========================================================
           :root 设计变量
           ========================================================= */
        :root {
            --color-primary: #3A8FD6;
            --color-primary-light: #E5F0FC;
            --color-secondary: #F5B342;
            --color-dark: #152B4C;
            --color-bg-light: #F0F4F8;
            --color-white: #FFFFFF;
            --color-text: #1A1F2E;
            --color-text-light: #6B7A8F;
            --color-text-lighter: #8A96A8;
            --color-border: #D0D7E2;
            --color-divider: #E8ECF0;
            --radius-small: 6px;
            --radius-card: 12px;
            --radius-button: 8px;
            --radius-large: 16px;
            --shadow-card: 0 4px 20px rgba(21, 43, 76, 0.06);
            --shadow-card-hover: 0 8px 32px rgba(21, 43, 76, 0.12);
            --shadow-hero: inset 0 0 0 1000px rgba(21, 43, 76, 0.55);
            --transition: 0.25s ease;
            --font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Helvetica Neue', 'Microsoft YaHei', sans-serif;
            --sidebar-width: 240px;
            --content-max: 1200px;
            --gap-section: 4rem;
            --gap-section-mobile: 2.5rem;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            display: flex;
            min-height: 100vh;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: #2a7bc4;
        }
        a:focus-visible {
            outline: 3px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-small);
        }

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

        ul,
        ol {
            list-style: none;
        }

        /* =========================================================
           Container / 布局
           ========================================================= */
        .app-wrapper {
            display: flex;
            width: 100%;
            min-height: 100vh;
        }

        .container {
            max-width: var(--content-max);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* =========================================================
           左侧 App Shell 导航
           ========================================================= */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-dark);
            color: var(--color-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition);
            overflow-y: auto;
        }

        .sidebar-logo {
            height: 72px;
            display: flex;
            align-items: center;
            padding: 0 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            flex-shrink: 0;
        }

        .sidebar-logo a {
            color: var(--color-white);
            font-size: 1.25rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.5px;
        }

        .sidebar-logo a i {
            color: var(--color-secondary);
            font-size: 1.5rem;
        }

        .sidebar-logo a:hover {
            color: var(--color-secondary);
        }

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

        .sidebar-nav ul {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .sidebar-nav ul li a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 20px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            font-weight: 500;
            border-left: 3px solid transparent;
            transition: background var(--transition), color var(--transition), border-color var(--transition);
            position: relative;
        }

        .sidebar-nav ul li a i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }

        .sidebar-nav ul li a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-white);
            border-left-color: var(--color-primary);
        }

        .sidebar-nav ul li a:hover i {
            color: var(--color-primary);
        }

        .sidebar-nav ul li a.active {
            background: rgba(255, 255, 255, 0.08);
            color: var(--color-white);
            border-left-color: var(--color-primary);
        }

        .sidebar-nav ul li a.active i {
            color: var(--color-primary);
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.75rem;
            color: var(--color-text-lighter);
            flex-shrink: 0;
            line-height: 1.5;
        }

        .sidebar-footer p {
            margin: 0;
        }

        /* =========================================================
           主内容区
           ========================================================= */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            background: var(--color-white);
            display: flex;
            flex-direction: column;
        }

        /* =========================================================
           移动端顶部栏（汉堡菜单）
           ========================================================= */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--color-dark);
            z-index: 1001;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
        }

        .mobile-header .mobile-logo {
            color: var(--color-white);
            font-size: 1.1rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-header .mobile-logo i {
            color: var(--color-secondary);
        }

        .hamburger-btn {
            background: none;
            border: none;
            color: var(--color-white);
            font-size: 1.5rem;
            padding: 8px;
            cursor: pointer;
            border-radius: var(--radius-small);
            transition: background var(--transition);
        }

        .hamburger-btn:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .hamburger-btn:focus-visible {
            outline: 3px solid var(--color-primary);
            outline-offset: 2px;
        }

        /* 移动端遮罩 */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }

        .sidebar-overlay.open {
            display: block;
        }

        /* =========================================================
           Hero / 页面横幅
           ========================================================= */
        .page-hero {
            position: relative;
            background: var(--color-dark);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 260px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 60px 24px;
            isolation: isolate;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(21, 43, 76, 0.85) 0%, rgba(21, 43, 76, 0.55) 100%);
            z-index: 0;
        }

        .page-hero .hero-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
        }

        .page-hero h1 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 16px;
            letter-spacing: 1px;
            line-height: 1.2;
        }

        .page-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.9);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* =========================================================
           时间轴板块
           ========================================================= */
        .section-timeline {
            padding: var(--gap-section) 0;
            background: var(--color-white);
        }

        .section-timeline .section-title {
            text-align: center;
            margin-bottom: 2.5rem;
        }

        .section-timeline .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .section-timeline .section-title p {
            color: var(--color-text-light);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        .timeline-container {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
            padding: 20px 0;
        }

        .timeline-container::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 3px;
            height: 100%;
            background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary), var(--color-primary));
            border-radius: 3px;
        }

        .timeline-item {
            position: relative;
            display: flex;
            justify-content: flex-end;
            padding: 20px 0;
            width: 100%;
        }

        .timeline-item:nth-child(odd) {
            justify-content: flex-start;
        }

        .timeline-item .timeline-content {
            width: 44%;
            background: var(--color-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px 28px;
            border: 1px solid var(--color-divider);
            transition: box-shadow var(--transition), transform var(--transition);
            position: relative;
        }

        .timeline-item .timeline-content:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .timeline-item .timeline-dot {
            position: absolute;
            left: 50%;
            top: 32px;
            transform: translateX(-50%);
            width: 18px;
            height: 18px;
            background: var(--color-secondary);
            border: 4px solid var(--color-white);
            border-radius: 50%;
            box-shadow: 0 0 0 3px var(--color-primary), 0 4px 12px rgba(21, 43, 76, 0.15);
            z-index: 2;
        }

        .timeline-item .timeline-badge {
            display: inline-block;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        .timeline-item .timeline-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .timeline-item .timeline-content p {
            font-size: 0.925rem;
            color: var(--color-text-light);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .timeline-item .timeline-meta {
            font-size: 0.8rem;
            color: var(--color-text-lighter);
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .timeline-item .timeline-meta i {
            margin-right: 4px;
            color: var(--color-primary);
        }

        .timeline-item .timeline-thumb {
            margin-top: 12px;
            border-radius: var(--radius-small);
            overflow: hidden;
            background: var(--color-bg-light);
        }

        .timeline-item .timeline-thumb img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: var(--radius-small);
        }

        /* =========================================================
           数据看板 / 成果统计
           ========================================================= */
        .section-stats {
            padding: var(--gap-section) 0;
            background: var(--color-bg-light);
        }

        .section-stats .section-title {
            text-align: center;
            margin-bottom: 2.5rem;
        }

        .section-stats .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .section-stats .section-title p {
            color: var(--color-text-light);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--color-white);
            border-radius: var(--radius-card);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
            border: 1px solid var(--color-divider);
        }

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

        .stat-card .stat-icon {
            font-size: 2.2rem;
            color: var(--color-primary);
            margin-bottom: 12px;
        }

        .stat-card .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--color-dark);
            line-height: 1.1;
            margin-bottom: 6px;
        }

        .stat-card .stat-number span {
            font-size: 1.6rem;
            font-weight: 600;
            color: var(--color-secondary);
        }

        .stat-card .stat-label {
            font-size: 0.925rem;
            color: var(--color-text-light);
            font-weight: 500;
        }

        /* =========================================================
           客户证言 / 引用
           ========================================================= */
        .section-testimonials {
            padding: var(--gap-section) 0;
            background: var(--color-white);
        }

        .section-testimonials .section-title {
            text-align: center;
            margin-bottom: 2.5rem;
        }

        .section-testimonials .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .section-testimonials .section-title p {
            color: var(--color-text-light);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testimonial-card {
            background: var(--color-bg-light);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            border: 1px solid var(--color-divider);
            transition: box-shadow var(--transition), transform var(--transition);
            position: relative;
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .testimonial-card .quote-icon {
            color: var(--color-primary);
            font-size: 1.5rem;
            opacity: 0.3;
            margin-bottom: 8px;
        }

        .testimonial-card .quote-text {
            font-size: 0.95rem;
            color: var(--color-text);
            line-height: 1.8;
            margin-bottom: 16px;
            font-style: italic;
        }

        .testimonial-card .quote-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-card .quote-author .avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-weight: 700;
            font-size: 1.1rem;
        }

        .testimonial-card .quote-author .author-info {
            font-size: 0.875rem;
        }

        .testimonial-card .quote-author .author-info .name {
            font-weight: 600;
            color: var(--color-text);
        }

        .testimonial-card .quote-author .author-info .role {
            color: var(--color-text-light);
            font-size: 0.8rem;
        }

        /* =========================================================
           CTA 区块
           ========================================================= */
        .section-cta {
            padding: var(--gap-section) 0;
            background: var(--color-dark);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            isolation: isolate;
        }

        .section-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(21, 43, 76, 0.78);
            z-index: 0;
        }

        .section-cta .container {
            position: relative;
            z-index: 1;
        }

        .cta-content {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 12px;
        }

        .cta-content p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 24px;
            line-height: 1.7;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-button);
            font-size: 1rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 3px solid var(--color-primary);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--color-secondary);
            color: var(--color-white);
            box-shadow: 0 4px 14px rgba(245, 179, 66, 0.35);
        }

        .btn-primary:hover {
            background: #e8a63a;
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 179, 66, 0.45);
        }

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

        .btn-secondary {
            background: transparent;
            color: var(--color-white);
            border: 2px solid var(--color-primary);
        }

        .btn-secondary:hover {
            background: var(--color-primary);
            color: var(--color-white);
            transform: translateY(-2px);
        }

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

        /* =========================================================
           FAQ 区块
           ========================================================= */
        .section-faq {
            padding: var(--gap-section) 0;
            background: var(--color-bg-light);
        }

        .section-faq .section-title {
            text-align: center;
            margin-bottom: 2.5rem;
        }

        .section-faq .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .section-faq .section-title p {
            color: var(--color-text-light);
            font-size: 1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-divider);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            background: var(--color-white);
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
            gap: 12px;
        }

        .faq-question:hover {
            background: var(--color-bg-light);
        }

        .faq-question:focus-visible {
            outline: 3px solid var(--color-primary);
            outline-offset: -2px;
        }

        .faq-question .faq-icon {
            font-size: 1.2rem;
            color: var(--color-primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.8;
            margin: 0;
        }

        /* =========================================================
           页脚
           ========================================================= */
        .site-footer {
            background: var(--color-dark);
            padding: 40px 0;
            margin-top: auto;
        }

        .footer-inner {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 40px;
            flex-wrap: wrap;
        }

        .footer-brand {
            max-width: 420px;
        }

        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-white);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .footer-logo i {
            color: var(--color-secondary);
        }

        .footer-brand p {
            font-size: 0.875rem;
            color: var(--color-text-lighter);
            line-height: 1.7;
            margin: 0;
        }

        .footer-right {
            text-align: right;
            font-size: 0.825rem;
            color: var(--color-text-lighter);
            line-height: 1.6;
        }

        .footer-right p {
            margin: 0 0 4px;
        }

        .footer-right a {
            color: var(--color-text-lighter);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

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

        /* =========================================================
           响应式设计
           ========================================================= */
        /* 小屏设备（≤ 1023px） */
        @media screen and (max-width: 1023px) {
            .app-sidebar {
                transform: translateX(-100%);
            }

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

            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }

            .mobile-header {
                display: flex;
            }

            .page-hero {
                min-height: 200px;
                padding: 40px 20px;
            }

            .page-hero h1 {
                font-size: 1.8rem;
            }

            .page-hero p {
                font-size: 1rem;
            }

            .timeline-container::before {
                left: 24px;
            }

            .timeline-item {
                justify-content: flex-start !important;
                padding-left: 48px;
            }

            .timeline-item .timeline-content {
                width: 100%;
            }

            .timeline-item .timeline-dot {
                left: 24px;
                top: 28px;
                width: 14px;
                height: 14px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .testimonial-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .footer-inner {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }

            .footer-right {
                text-align: center;
            }
        }

        /* 中屏设备（≥ 1024px） */
        @media screen and (min-width: 1024px) {
            .sidebar-overlay {
                display: none !important;
            }
        }

        /* 小屏手机（≤ 639px） */
        @media screen and (max-width: 639px) {
            :root {
                --gap-section: 2.5rem;
            }

            .container {
                padding: 0 16px;
            }

            .page-hero h1 {
                font-size: 1.5rem;
            }

            .page-hero p {
                font-size: 0.925rem;
            }

            .section-timeline .section-title h2,
            .section-stats .section-title h2,
            .section-testimonials .section-title h2,
            .section-faq .section-title h2,
            .cta-content h2 {
                font-size: 1.5rem;
            }

            .timeline-item .timeline-content {
                padding: 18px 18px;
            }

            .timeline-item .timeline-content h3 {
                font-size: 1rem;
            }

            .timeline-item .timeline-content p {
                font-size: 0.85rem;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .stat-card {
                padding: 20px 12px;
            }

            .stat-card .stat-number {
                font-size: 2rem;
            }

            .stat-card .stat-number span {
                font-size: 1.2rem;
            }

            .testimonial-card {
                padding: 20px 16px;
            }

            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }

            .faq-question {
                padding: 14px 16px;
                font-size: 0.925rem;
            }

            .faq-answer p {
                font-size: 0.875rem;
            }

            .sidebar-footer {
                font-size: 0.7rem;
                padding: 12px 16px;
            }
        }

        /* 超大屏（≥ 1200px） */
        @media screen and (min-width: 1200px) {
            .container {
                padding: 0 32px;
            }
        }

/* roulang page: category3 */
/* ========== Design Variables ========== */
        :root {
            --color-primary: #3A8FD6;
            --color-primary-hover: #5ba3e0;
            --color-accent: #F5B342;
            --color-accent-hover: #f7c265;
            --color-dark: #152B4C;
            --color-dark-hover: #1e3a61;
            --color-light-bg: #F0F4F8;
            --color-white: #FFFFFF;
            --color-text: #1A1F2E;
            --color-text-gray: #6B7A8F;
            --color-text-light: #8A96A8;
            --color-border: #D0D7E2;
            --color-divider: #E8ECF0;
            --color-nav-text: #B0C0D0;
            --color-badge-bg: #E5F0FC;
            --color-badge-text: #3A8FD6;
            --radius-sm: 6px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --shadow-card: 0 4px 20px rgba(21, 43, 76, 0.06);
            --shadow-card-hover: 0 8px 32px rgba(21, 43, 76, 0.12);
            --shadow-btn: none;
            --transition-fast: 0.2s ease;
            --transition-medium: 0.3s ease;
            --sidebar-width: 240px;
            --header-height: 72px;
            --max-content: 1200px;
            --gap-section: 4rem;
            --gap-section-mobile: 2.5rem;
            --gap-card: 24px;
            --gap-card-mobile: 16px;
            --font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
        }

        /* ========== Reset & Base ========== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-white);
            display: flex;
            min-height: 100vh;
            overflow-x: hidden;
        }
        a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
        a:hover { color: var(--color-primary-hover); }
        a:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: 2px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--color-text); }
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.75rem; }
        h3 { font-size: 1.25rem; }
        h4 { font-size: 1.125rem; }
        p { margin-bottom: 0.5rem; color: var(--color-text-gray); }
        .container { max-width: var(--max-content); margin: 0 auto; padding: 0 24px; width: 100%; }

        /* ========== Sidebar Navigation ========== */
        .app-sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-dark);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition-medium);
            overflow-y: auto;
        }
        .sidebar-logo {
            height: var(--header-height);
            display: flex;
            align-items: center;
            padding: 0 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-white);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.5px;
        }
        .sidebar-logo a i { color: var(--color-accent); font-size: 1.4rem; }
        .sidebar-logo a:hover { color: var(--color-accent); }
        .sidebar-nav { flex: 1; padding: 16px 0; }
        .sidebar-nav ul { display: flex; flex-direction: column; gap: 4px; padding: 0 12px; }
        .sidebar-nav li { margin: 0; }
        .sidebar-nav li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-nav-text);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
        }
        .sidebar-nav li a i { width: 20px; text-align: center; font-size: 1rem; color: var(--color-nav-text); }
        .sidebar-nav li a:hover {
            color: var(--color-white);
            background: rgba(255,255,255,0.06);
            border-left-color: var(--color-primary);
        }
        .sidebar-nav li a.active {
            color: var(--color-white);
            background: rgba(58, 143, 214, 0.18);
            border-left-color: var(--color-primary);
        }
        .sidebar-nav li a.active i { color: var(--color-primary); }
        .sidebar-footer {
            padding: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            flex-shrink: 0;
        }
        .sidebar-footer p { font-size: 0.75rem; color: var(--color-nav-text); line-height: 1.5; margin: 0; }

        /* ========== Mobile Header ========== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--color-dark);
            z-index: 1001;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
        }
        .mobile-header .logo a {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-white);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .logo a i { color: var(--color-accent); }
        .hamburger {
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .hamburger:hover { background: rgba(255,255,255,0.1); }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--color-white);
            border-radius: 2px;
            transition: all var(--transition-medium);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* ========== Drawer Overlay ========== */
        .drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.5);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition-medium);
        }
        .drawer-overlay.open { display: block; opacity: 1; }

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

        /* ========== Page Header ========== */
        .page-header {
            padding: 2rem 0 1.5rem;
            background: var(--color-light-bg);
            border-bottom: 1px solid var(--color-divider);
        }
        .page-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .page-header h1 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-dark);
            display: flex;
            align-items: center;
            gap: 12px;
            margin: 0;
        }
        .page-header h1 i { color: var(--color-accent); font-size: 2rem; }
        .page-header .breadcrumb {
            font-size: 0.875rem;
            color: var(--color-text-light);
        }
        .page-header .breadcrumb a { color: var(--color-text-light); }
        .page-header .breadcrumb a:hover { color: var(--color-primary); }
        .page-header .breadcrumb span { color: var(--color-text-gray); }

        /* ========== Hero Banner ========== */
        .insight-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background: var(--color-dark);
            overflow: hidden;
        }
        .insight-hero .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.35;
            pointer-events: none;
        }
        .insight-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(21,43,76,0.85) 0%, rgba(21,43,76,0.40) 100%);
            pointer-events: none;
        }
        .insight-hero .container {
            position: relative;
            z-index: 2;
            padding: 4rem 24px;
            text-align: center;
        }
        .insight-hero h2 {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 1rem;
            letter-spacing: 1px;
        }
        .insight-hero h2 span { color: var(--color-accent); }
        .insight-hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.85);
            max-width: 720px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }
        .insight-hero .hero-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            background: var(--color-accent);
            color: var(--color-white);
            font-size: 1rem;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: filter var(--transition-fast), transform var(--transition-fast);
        }
        .insight-hero .hero-cta:hover { filter: brightness(1.12); transform: translateY(-2px); color: var(--color-white); }
        .insight-hero .hero-cta i { font-size: 1.1rem; }

        /* ========== Section Common ========== */
        .section-block {
            padding: var(--gap-section) 0;
        }
        .section-block .section-title {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .section-block .section-title h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 0.5rem;
        }
        .section-block .section-title p {
            font-size: 1.05rem;
            color: var(--color-text-gray);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-block .section-title .title-bar {
            width: 60px;
            height: 4px;
            background: var(--color-accent);
            margin: 12px auto 0;
            border-radius: 2px;
        }
        .bg-light { background: var(--color-light-bg); }
        .bg-white { background: var(--color-white); }
        .bg-dark { background: var(--color-dark); }
        .bg-dark .section-title h2 { color: var(--color-white); }
        .bg-dark .section-title p { color: var(--color-nav-text); }

        /* ========== Data Dashboard ========== */
        .data-dashboard {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin: 0 auto;
            max-width: var(--max-content);
            padding: 0 24px;
        }
        .data-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition-medium), transform var(--transition-medium);
            border: 1px solid var(--color-divider);
        }
        .data-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .data-card .data-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
            margin-bottom: 0.25rem;
        }
        .data-card .data-number .suffix { font-size: 1.4rem; font-weight: 600; color: var(--color-accent); }
        .data-card .data-label {
            font-size: 0.95rem;
            color: var(--color-text-gray);
            font-weight: 500;
        }
        .data-card .data-icon {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 0.75rem;
            opacity: 0.7;
        }

        /* ========== Insight Cards Grid ========== */
        .insight-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: var(--max-content);
            margin: 0 auto;
            padding: 0 24px;
        }
        .insight-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition-medium), transform var(--transition-medium);
            border: 1px solid var(--color-divider);
            display: flex;
            flex-direction: column;
        }
        .insight-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .insight-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: var(--color-light-bg);
        }
        .insight-card .card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .insight-card .card-body .card-tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--color-badge-bg);
            color: var(--color-badge-text);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 20px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .insight-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--color-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .insight-card .card-body p {
            font-size: 0.9rem;
            color: var(--color-text-gray);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }
        .insight-card .card-body .card-link {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-fast);
        }
        .insight-card .card-body .card-link:hover { gap: 10px; color: var(--color-primary-hover); }

        /* ========== Architecture Flow ========== */
        .arch-section {
            max-width: var(--max-content);
            margin: 0 auto;
            padding: 0 24px;
        }
        .arch-flow {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 12px 8px;
            margin-top: 2rem;
        }
        .arch-step {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--color-white);
            padding: 16px 24px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-divider);
            transition: box-shadow var(--transition-fast);
        }
        .arch-step:hover { box-shadow: var(--shadow-card-hover); }
        .arch-step .step-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-badge-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .arch-step .step-text { font-weight: 500; color: var(--color-dark); font-size: 0.95rem; white-space: nowrap; }
        .arch-flow .flow-arrow {
            font-size: 1.3rem;
            color: var(--color-accent);
            flex-shrink: 0;
        }

        /* ========== FAQ Accordion ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .faq-item {
            border-bottom: 1px solid var(--color-divider);
            padding: 0;
        }
        .faq-item:last-child { border-bottom: none; }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 0;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-dark);
            cursor: pointer;
            text-align: left;
            gap: 12px;
            transition: color var(--transition-fast);
        }
        .faq-question:hover { color: var(--color-primary); }
        .faq-question i {
            font-size: 1.1rem;
            color: var(--color-primary);
            transition: transform var(--transition-medium);
            flex-shrink: 0;
        }
        .faq-question.open i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 0;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 0 18px 0;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--color-text-gray);
            line-height: 1.7;
            margin: 0;
        }

        /* ========== CTA Block ========== */
        .cta-block {
            background: var(--color-dark);
            padding: 3.5rem 0;
            text-align: center;
        }
        .cta-block .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1rem;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 0.25rem;
        }
        .cta-block p {
            font-size: 1.1rem;
            color: var(--color-nav-text);
            max-width: 560px;
            margin-bottom: 1.25rem;
        }
        .cta-block .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 44px;
            background: var(--color-accent);
            color: var(--color-white);
            font-size: 1rem;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: filter var(--transition-fast), transform var(--transition-fast);
        }
        .cta-block .cta-btn:hover { filter: brightness(1.12); transform: translateY(-2px); color: var(--color-white); }
        .cta-block .cta-btn i { font-size: 1.1rem; }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--color-dark);
            padding: 2.5rem 0;
            margin-top: auto;
        }
        .site-footer .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: flex-start;
            gap: 2rem;
        }
        .site-footer .footer-brand { max-width: 400px; }
        .site-footer .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-white);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        .site-footer .footer-logo i { color: var(--color-accent); }
        .site-footer .footer-brand p {
            font-size: 0.875rem;
            color: var(--color-nav-text);
            line-height: 1.7;
            margin: 0;
        }
        .site-footer .footer-right {
            text-align: right;
            font-size: 0.85rem;
            color: var(--color-nav-text);
            line-height: 1.8;
        }
        .site-footer .footer-right p { margin: 0; color: var(--color-nav-text); }
        .site-footer .footer-right .copyright a { color: var(--color-nav-text); }
        .site-footer .footer-right .copyright a:hover { color: var(--color-accent); }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            :root { --sidebar-width: 220px; --gap-section: 3rem; }
            .insight-grid { grid-template-columns: repeat(2, 1fr); }
            .data-dashboard { grid-template-columns: repeat(2, 1fr); }
            .insight-hero h2 { font-size: 2.2rem; }
        }

        @media (max-width: 768px) {
            .app-sidebar { transform: translateX(-100%); }
            .app-sidebar.open { transform: translateX(0); }
            .mobile-header { display: flex; }
            .main-content { margin-left: 0; padding-top: var(--header-height); }
            .page-header { padding: 1.25rem 0; }
            .page-header h1 { font-size: 1.6rem; }
            .page-header h1 i { font-size: 1.4rem; }
            .page-header .breadcrumb { font-size: 0.8rem; width: 100%; margin-top: 0.5rem; }
            .insight-hero { min-height: 320px; }
            .insight-hero h2 { font-size: 1.8rem; }
            .insight-hero p { font-size: 1rem; }
            .insight-grid { grid-template-columns: 1fr; gap: 16px; }
            .data-dashboard { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .data-card { padding: 1.5rem 1rem; }
            .data-card .data-number { font-size: 2rem; }
            .section-block { padding: var(--gap-section-mobile) 0; }
            .section-block .section-title h2 { font-size: 1.5rem; }
            .arch-flow { flex-direction: column; align-items: stretch; }
            .arch-step { justify-content: center; }
            .arch-flow .flow-arrow { transform: rotate(90deg); }
            .cta-block h2 { font-size: 1.5rem; }
            .cta-block p { font-size: 0.95rem; }
            .site-footer .footer-inner { flex-direction: column; text-align: center; }
            .site-footer .footer-brand { max-width: 100%; }
            .site-footer .footer-right { text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .data-dashboard { grid-template-columns: 1fr 1fr; gap: 12px; }
            .data-card .data-number { font-size: 1.6rem; }
            .data-card .data-number .suffix { font-size: 1rem; }
            .data-card .data-label { font-size: 0.8rem; }
            .insight-hero h2 { font-size: 1.5rem; }
            .insight-hero .hero-cta { padding: 12px 28px; font-size: 0.9rem; }
            .faq-question { font-size: 0.9rem; padding: 14px 0; }
            .cta-block .cta-btn { padding: 12px 28px; font-size: 0.9rem; }
            .page-header h1 { font-size: 1.3rem; }
            .sidebar-logo a { font-size: 1.1rem; }
            .mobile-header .logo a { font-size: 1rem; }
        }

        /* ========== Utility ========== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }