/* roulang page: index */
:root {
    --primary: #0f4c81;
    --primary-dark: #0a3560;
    --primary-light: #1a6fb5;
    --accent: #f0a500;
    --accent-light: #ffc940;
    --bg-light: #f4f6fa;
    --bg-dark: #0b1a2e;
    --card-bg: #ffffff;
    --text-main: #1a1a2e;
    --text-muted: #5b6b7f;
    --border-color: #e4e9f0;
    --radius-sm: 6px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-family); color: var(--text-main); background: var(--bg-light); line-height: 1.7; font-size: 16px; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul, ol { list-style: none; }
button { border: none; cursor: pointer; font-family: inherit; }
input:focus, button:focus, a:focus { outline: 2px solid rgba(240, 165, 0, 0.5); outline-offset: 2px; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.grid-container { max-width: 1200px; }
.text-center { text-align: center; }
.section { padding: 80px 0; }
.section-header { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-header .section-tag { display: inline-block; background: rgba(15, 76, 129, 0.08); color: var(--primary); font-size: 14px; font-weight: 600; padding: 6px 18px; border-radius: 30px; letter-spacing: 1px; margin-bottom: 16px; }
.section-header h2 { font-size: 36px; font-weight: 800; color: var(--primary-dark); line-height: 1.3; margin-bottom: 16px; }
.section-header p { font-size: 16px; color: var(--text-muted); }

/* ---- Header ---- */
.site-header { position: sticky; top: 0; z-index: 1000; box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06); }
.topbar { background: var(--bg-dark); color: rgba(255, 255, 255, 0.8); font-size: 13px; padding: 6px 0; }
.topbar .grid-x { display: flex; align-items: center; justify-content: space-between; }
.topbar-item { display: inline-flex; align-items: center; gap: 6px; margin-right: 20px; }
.topbar-item i { color: var(--accent); }
.main-nav { background: #fff; transition: var(--transition); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 40px; height: 40px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 18px; }
.logo-text { font-size: 20px; font-weight: 800; color: var(--primary); letter-spacing: 1px; }
.nav-list { display: flex; gap: 32px; }
.nav-list a { font-size: 15px; font-weight: 500; color: var(--text-main); padding: 8px 4px; position: relative; }
.nav-list a::after { content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--accent); transition: width 0.3s; }
.nav-list a:hover { color: var(--primary); }
.nav-list a:hover::after { width: 100%; }
.nav-list a.active { color: var(--primary); font-weight: 600; }
.nav-list a.active::after { width: 100%; }
.nav-cta { margin-left: 12px; }
.menu-toggle { display: none; background: none; font-size: 24px; color: var(--primary); padding: 8px; }

/* ---- Buttons ---- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 30px; font-weight: 600; font-size: 15px; transition: var(--transition); border: 1px solid transparent; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; box-shadow: 0 4px 16px rgba(15, 76, 129, 0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(15, 76, 129, 0.4); color: #fff; }
.btn-outline { border-color: rgba(255, 255, 255, 0.7); color: #fff; background: transparent; }
.btn-outline:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-2px); color: #fff; }
.btn-outline-dark { border-color: var(--primary); color: var(--primary); background: transparent; }
.btn-outline-dark:hover { background: var(--primary); color: #fff; }
.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn-block { width: 100%; justify-content: center; }
.btn-gold { background: linear-gradient(135deg, var(--accent), var(--accent-light)); color: #fff; box-shadow: 0 4px 16px rgba(240, 165, 0, 0.3); }
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(240, 165, 0, 0.4); color: #fff; }

/* ---- Hero ---- */
.hero { position: relative; padding: 110px 0 100px; color: #fff; background: linear-gradient(135deg, rgba(11, 26, 46, 0.94), rgba(15, 76, 129, 0.88)), url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -60%; right: -20%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(240, 165, 0, 0.15), transparent 60%); }
.hero-content { position: relative; z-index: 2; max-width: 720px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255, 255, 255, 0.15); border: 1px solid rgba(255, 255, 255, 0.25); padding: 8px 18px; border-radius: 30px; font-size: 14px; margin-bottom: 24px; backdrop-filter: blur(6px); }
.hero-badge i { color: var(--accent-light); }
.hero h1 { font-size: 52px; font-weight: 900; line-height: 1.2; margin-bottom: 20px; letter-spacing: 1px; }
.hero h1 span { color: var(--accent-light); }
.hero p { font-size: 17px; line-height: 1.8; color: rgba(255, 255, 255, 0.85); margin-bottom: 36px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-meta { display: flex; gap: 28px; flex-wrap: wrap; }
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: rgba(255, 255, 255, 0.75); }
.hero-meta i { color: var(--accent-light); }

/* ---- Stats ---- */
.stats-bar { background: #fff; padding: 40px 0; box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04); margin-top: -30px; position: relative; z-index: 10; border-radius: 20px; max-width: 1100px; margin-left: auto; margin-right: auto; }
.stats-grid { display: flex; justify-content: space-around; flex-wrap: wrap; }
.stat-item { text-align: center; padding: 10px 20px; min-width: 160px; }
.stat-num { font-size: 38px; font-weight: 800; color: var(--primary); line-height: 1.2; }
.stat-label { font-size: 14px; color: var(--text-muted); margin-top: 6px; }

/* ---- Services ---- */
.services-section { padding: 80px 0; }
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.service-card { background: var(--card-bg); border-radius: var(--radius-lg); padding: 40px 30px; text-align: center; border: 1px solid var(--border-color); box-shadow: var(--shadow-sm); transition: var(--transition); }
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-icon { width: 72px; height: 72px; background: linear-gradient(135deg, rgba(15, 76, 129, 0.1), rgba(26, 111, 181, 0.14)); border-radius: 20px; display: flex; align-items: center; justify-content: center; font-size: 28px; color: var(--primary); margin: 0 auto 24px; transition: var(--transition); }
.service-card:hover .service-icon { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; transform: scale(1.05); }
.service-card h3 { font-size: 20px; font-weight: 700; color: var(--primary-dark); margin-bottom: 12px; }
.service-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ---- Process ---- */
.process-section { background: var(--bg-dark); padding: 80px 0; position: relative; overflow: hidden; }
.process-section .section-header h2 { color: #fff; }
.process-section .section-header p { color: rgba(255, 255, 255, 0.7); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; margin-top: 40px; }
.process-item { background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.1); padding: 36px 24px; border-radius: var(--radius-md); text-align: center; position: relative; backdrop-filter: blur(4px); transition: var(--transition); }
.process-item:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-4px); }
.process-num { width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 800; font-size: 18px; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; }
.process-item h3 { font-size: 18px; color: #fff; font-weight: 600; margin-bottom: 10px; }
.process-item p { font-size: 14px; color: rgba(255, 255, 255, 0.65); line-height: 1.6; }

/* ---- Categories ---- */
.categories-section { padding: 80px 0; }
.categories-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.category-card { background: #fff; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border-color); box-shadow: var(--shadow-sm); transition: var(--transition); }
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.category-img { position: relative; height: 180px; overflow: hidden; }
.category-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.category-card:hover .category-img img { transform: scale(1.06); }
.category-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(11, 26, 46, 0.3), transparent); }
.category-body { padding: 24px; }
.category-body h3 { font-size: 18px; font-weight: 700; color: var(--primary-dark); margin-bottom: 8px; }
.category-body p { font-size: 14px; color: var(--text-muted); margin-bottom: 16px; line-height: 1.6; }
.category-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.category-link:hover { color: var(--accent); }
.category-link i { transition: transform 0.3s; }
.category-link:hover i { transform: translateX(4px); }
.category-tag { position: absolute; top: 16px; left: 16px; z-index: 2; background: rgba(255, 255, 255, 0.92); color: var(--primary); font-size: 12px; font-weight: 700; padding: 4px 14px; border-radius: 20px; }

/* ---- News ---- */
.news-section { background: #fff; padding: 80px 0; }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card { background: var(--bg-light); border-radius: var(--radius-md); padding: 28px; border: 1px solid var(--border-color); transition: var(--transition); }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.news-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.badge { background: var(--primary); color: #fff; font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 20px; }
.news-date { font-size: 13px; color: var(--text-muted); }
.news-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; line-height: 1.4; }
.news-card h3 a { color: var(--text-main); }
.news-card h3 a:hover { color: var(--primary); }
.news-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
.empty-tip { text-align: center; padding: 40px; color: var(--text-muted); font-size: 16px; background: var(--bg-light); border-radius: var(--radius-md); }
.news-more { text-align: center; margin-top: 40px; }

/* ---- FAQ ---- */
.faq-section { padding: 80px 0; }
.faq-list { max-width: 840px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border-color); border-radius: var(--radius-md); margin-bottom: 16px; overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: rgba(15, 76, 129, 0.3); box-shadow: var(--shadow-sm); }
.faq-question { width: 100%; background: none; padding: 22px 28px; display: flex; justify-content: space-between; align-items: center; font-size: 16px; font-weight: 600; color: var(--text-main); text-align: left; }
.faq-question i { color: var(--primary); font-size: 14px; transition: transform 0.3s; display: inline-flex; align-items: center; justify-content: center; width: 24px; height: 24px; border-radius: 50%; background: rgba(15, 76, 129, 0.08); }
.faq-item.active .faq-question i { transform: rotate(45deg); }
.faq-answer { display: none; padding: 0 28px 22px; font-size: 14px; color: var(--text-muted); line-height: 1.8; }

/* ---- CTA ---- */
.cta-section { padding: 60px 0; }
.cta-box { background: linear-gradient(135deg, var(--primary), var(--primary-light)); border-radius: var(--radius-lg); padding: 56px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 30px; color: #fff; box-shadow: var(--shadow-lg); position: relative; overflow: hidden; }
.cta-box::before { content: ''; position: absolute; top: -50%; right: -10%; width: 400px; height: 400px; border-radius: 50%; background: rgba(255, 255, 255, 0.06); }
.cta-content { position: relative; z-index: 2; max-width: 600px; }
.cta-content h2 { font-size: 32px; font-weight: 800; margin-bottom: 12px; }
.cta-content p { font-size: 15px; color: rgba(255, 255, 255, 0.85); }
.cta-actions { position: relative; z-index: 2; display: flex; gap: 14px; flex-wrap: wrap; }

/* ---- Footer ---- */
.site-footer { background: var(--bg-dark); color: rgba(255, 255, 255, 0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 2fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .logo-text { color: #fff; font-size: 24px; }
.footer-brand p { font-size: 14px; margin-top: 16px; line-height: 1.7; color: rgba(255, 255, 255, 0.55); }
.footer-title { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 20px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: rgba(255, 255, 255, 0.55); }
.footer-links a:hover { color: var(--accent); }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: rgba(255, 255, 255, 0.55); margin-bottom: 12px; }
.footer-contact i { color: var(--accent); margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.08); padding: 20px 0; text-align: center; font-size: 13px; color: rgba(255, 255, 255, 0.35); }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .categories-grid { grid-template-columns: repeat(2, 1fr); }
    .process-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero h1 { font-size: 42px; }
}
@media (max-width: 768px) {
    .nav-list { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px 24px; gap: 0; box-shadow: 0 12px 24px rgba(0,0,0,0.1); z-index: 999; }
    .nav-list.open { display: flex; }
    .nav-list li { border-bottom: 1px solid var(--border-color); }
    .nav-list li:last-child { border-bottom: none; }
    .nav-list a { display: block; padding: 14px 0; font-size: 16px; }
    .menu-toggle { display: block; }
    .nav-cta { display: none; }
    .hero { padding: 70px 0 80px; }
    .hero h1 { font-size: 32px; }
    .hero p { font-size: 15px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; justify-content: center; }
    .stats-bar { margin-top: -20px; border-radius: 16px; }
    .stats-grid { flex-direction: column; gap: 20px; }
    .services-grid { grid-template-columns: 1fr; }
    .categories-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .cta-box { padding: 36px 24px; }
    .cta-content h2 { font-size: 26px; }
    .section { padding: 60px 0; }
    .section-header h2 { font-size: 28px; }
    .grid-x { flex-wrap: wrap; }
}

@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .hero h1 { font-size: 26px; }
    .hero-meta { gap: 16px; flex-direction: column; }
    .stat-item { min-width: 100%; }
    .faq-question { font-size: 14px; padding: 18px 20px; }
    .faq-answer { padding: 0 20px 18px; }
    .cta-actions { flex-direction: column; }
    .cta-actions .btn { width: 100%; justify-content: center; }
}

/* ---- Reveal animations ---- */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* roulang page: article */
:root {
            --primary: #0d6e6e;
            --primary-dark: #0a5454;
            --primary-light: #e0f2f1;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg-light: #f7fafc;
            --bg-white: #ffffff;
            --text-main: #1f2937;
            --text-muted: #6b7280;
            --text-soft: #9ca3af;
            --border: #e5e7eb;
            --border-light: #f0f0f0;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 40px;
            --space-xl: 64px;
            --space-xxl: 96px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-white);
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: var(--primary);
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            width: 100%;
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-white);
            box-shadow: 0 1px 0 rgba(0,0,0,0.06);
        }

        .topbar {
            background: linear-gradient(135deg, #0a5454, #0d6e6e);
            color: rgba(255,255,255,0.9);
            font-size: 13px;
            padding: 8px 0;
            letter-spacing: 0.2px;
        }

        .topbar a {
            color: rgba(255,255,255,0.9);
        }
        .topbar a:hover {
            color: #ffffff;
        }
        .topbar-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .topbar-item i {
            font-size: 12px;
            opacity: 0.75;
        }

        .main-nav {
            padding: 16px 0;
            background: var(--bg-white);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), #14b8a6);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(13, 110, 110, 0.3);
        }

        .logo-text {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

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

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
        }
        .nav-list li {
            margin: 0;
        }
        .nav-list a {
            display: inline-block;
            padding: 10px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
        }
        .nav-list a:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .nav-list a.active {
            background: var(--primary-light);
            color: var(--primary-dark);
            font-weight: 600;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-cta {
            padding: 10px 22px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            background: linear-gradient(135deg, var(--primary), #14b8a6);
            color: #fff;
            box-shadow: 0 4px 12px rgba(13, 110, 110, 0.25);
            transition: var(--transition);
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(13, 110, 110, 0.35);
            color: #fff;
        }

        .menu-toggle {
            display: none;
            background: var(--primary-light);
            border-radius: 8px;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            cursor: pointer;
            transition: var(--transition);
        }
        .menu-toggle:hover {
            background: var(--primary);
            color: #fff;
        }

        @media screen and (max-width: 900px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px;
                gap: 8px;
                box-shadow: 0 12px 32px rgba(0,0,0,0.12);
                border-radius: 0 0 12px 12px;
                z-index: 99;
            }
            .nav-list.open {
                display: flex !important;
            }
            .nav-list a {
                display: block;
                width: 100%;
                padding: 12px 16px;
                border-radius: 8px;
            }
            .menu-toggle {
                display: flex;
            }
        }

        @media screen and (max-width: 520px) {
            .logo-text {
                font-size: 18px;
            }
            .nav-cta {
                display: none;
            }
            .nav-inner {
                gap: 12px;
            }
        }

        /* ===== Breadcrumb / Page Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, #0d1f2d 0%, #0a5454 60%, #14b8a6 100%);
            padding: 72px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: 30%;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255,255,255,0.03);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
            color: rgba(255,255,255,0.65);
            font-size: 13px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255,255,255,0.75);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb i {
            font-size: 10px;
            opacity: 0.6;
        }
        .breadcrumb .current {
            color: rgba(255,255,255,0.9);
            font-weight: 500;
        }

        .banner-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.4;
            color: #fff;
            max-width: 760px;
            margin-bottom: 12px;
        }
        .banner-desc {
            font-size: 15px;
            color: rgba(255,255,255,0.75);
            max-width: 640px;
            line-height: 1.8;
        }

        @media screen and (max-width: 768px) {
            .page-banner {
                padding: 48px 0 40px;
            }
            .banner-title {
                font-size: 24px;
            }
        }

        /* ===== Article Layout ===== */
        .article-section {
            padding: 64px 0 0;
            background: var(--bg-light);
        }
        .article-grid {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 40px;
            padding-bottom: 64px;
        }

        .article-main {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            padding: 40px;
        }

        .article-head {
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-light);
            margin-bottom: 28px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .meta-item i {
            font-size: 12px;
            color: var(--primary);
        }
        .article-category {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .article-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--text-main);
            margin: 14px 0 10px;
        }

        .article-body {
            font-size: 15.5px;
            line-height: 1.9;
            color: #374151;
        }
        .article-body p {
            margin-bottom: 1.2em;
        }
        .article-body h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin: 36px 0 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--primary-light);
        }
        .article-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin: 28px 0 12px;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 20px 0;
        }
        .article-body ul,
        .article-body ol {
            margin: 16px 0 20px;
            padding-left: 20px;
        }
        .article-body ul li {
            list-style: disc;
            margin-bottom: 8px;
        }
        .article-body ol li {
            list-style: decimal;
            margin-bottom: 8px;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 12px 20px;
            background: var(--primary-light);
            border-radius: 0 8px 8px 0;
            margin: 20px 0;
            color: #14532d;
            font-size: 14px;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-not-found {
            text-align: center;
            padding: 60px 30px;
        }
        .article-not-found .icon {
            font-size: 56px;
            color: var(--primary);
            margin-bottom: 20px;
            background: var(--primary-light);
            border-radius: 50%;
            width: 100px;
            height: 100px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .article-not-found h2 {
            font-size: 26px;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 24px;
        }

        .sidebar-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-title i {
            color: var(--primary);
            font-size: 14px;
        }

        .sidebar-list {
            margin: 0;
            padding: 0;
        }
        .sidebar-list li {
            border-bottom: 1px dashed var(--border-light);
            padding: 10px 0;
        }
        .sidebar-list li:last-child {
            border-bottom: none;
        }
        .sidebar-list a {
            font-size: 14px;
            color: var(--text-main);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            line-height: 1.6;
        }
        .sidebar-list a i {
            color: var(--primary);
            font-size: 10px;
            margin-top: 6px;
        }
        .sidebar-list a:hover {
            color: var(--primary);
        }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags .tag {
            background: var(--bg-light);
            border: 1px solid var(--border);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 12px;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .sidebar-tags .tag:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), #14b8a6);
            color: #fff;
            padding: 28px 24px;
            border-radius: var(--radius);
            text-align: center;
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
        }
        .sidebar-cta h4 {
            font-size: 18px;
            margin-bottom: 12px;
        }
        .sidebar-cta p {
            font-size: 13px;
            opacity: 0.85;
            margin-bottom: 18px;
            line-height: 1.7;
        }
        .sidebar-cta .btn {
            background: #fff;
            color: var(--primary);
            padding: 10px 24px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        .sidebar-cta .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        }

        .sidebar-guide {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 24px;
        }
        .guide-steps {
            counter-reset: step;
        }
        .guide-step {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px dashed var(--border-light);
        }
        .guide-step:last-child {
            border-bottom: none;
        }
        .guide-step .step-num {
            width: 28px;
            height: 28px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .guide-step .step-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .guide-step .step-text strong {
            color: var(--text-main);
            display: block;
            margin-bottom: 2px;
        }

        @media screen and (max-width: 1024px) {
            .article-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media screen and (max-width: 768px) {
            .article-section {
                padding: 40px 0 0;
            }
            .article-main {
                padding: 24px 20px;
            }
            .article-title {
                font-size: 22px;
            }
            .article-body h2 {
                font-size: 18px;
            }
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 64px 0 80px;
            background: var(--bg-light);
        }
        .related-section .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 16px;
        }
        .related-section .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-main);
            margin: 0;
        }
        .related-section .section-subtitle {
            color: var(--text-muted);
            font-size: 14px;
            margin-top: 4px;
        }

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

        .article-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .article-card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .article-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .article-card:hover .article-card-img img {
            transform: scale(1.06);
        }
        .article-card-img::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 50%;
            background: linear-gradient(to top, rgba(0,0,0,0.15), transparent);
        }

        .article-card-body {
            padding: 20px 20px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card-cat {
            font-size: 11px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 10px;
            border-radius: 4px;
            align-self: flex-start;
            margin-bottom: 10px;
        }

        .article-card-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .article-card-title a {
            color: var(--text-main);
        }
        .article-card-title a:hover {
            color: var(--primary);
        }

        .article-card-summary {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 12px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-card-date {
            font-size: 12px;
            color: var(--text-soft);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        @media screen and (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media screen and (max-width: 600px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-section .section-title {
                font-size: 20px;
            }
        }

        /* ===== Feature Section ===== */
        .feature-section {
            padding: 64px 0;
            background: var(--bg-white);
        }
        .feature-section .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .feature-section .section-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-section .section-desc {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            text-align: center;
            padding: 36px 28px;
            background: var(--bg-light);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-card:hover {
            background: var(--bg-white);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            background: linear-gradient(135deg, var(--primary-light), #d1fae5);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
        }
        .feature-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        @media screen and (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media screen and (max-width: 600px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .feature-section .section-title {
                font-size: 22px;
            }
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 64px 0 80px;
            background: var(--bg-light);
        }
        .faq-section .container {
            max-width: 900px;
        }
        .faq-section .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .faq-section .section-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .faq-section .section-desc {
            font-size: 15px;
            color: var(--text-muted);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            gap: 16px;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 14px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            display: none;
            padding: 0 24px 18px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        @media screen and (max-width: 768px) {
            .faq-section {
                padding: 48px 0;
            }
            .faq-section .section-title {
                font-size: 22px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-answer {
                padding: 0 16px 14px;
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 0 0 80px;
            background: var(--bg-light);
        }
        .cta-banner {
            background: linear-gradient(135deg, #0a5454 0%, #14b8a6 100%);
            border-radius: 24px;
            padding: 56px 56px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            text-align: center;
            color: #fff;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
        }
        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
        }
        .cta-banner h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            font-size: 15px;
            opacity: 0.85;
            margin-bottom: 28px;
            line-height: 1.8;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-white {
            background: #ffffff;
            color: var(--primary);
            padding: 14px 34px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            box-shadow: 0 6px 20px rgba(0,0,0,0.15);
            transition: var(--transition);
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-white:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(0,0,0,0.2);
            color: var(--primary-dark);
        }

        @media screen and (max-width: 768px) {
            .cta-banner {
                padding: 40px 24px;
                border-radius: 16px;
            }
            .cta-banner h2 {
                font-size: 22px;
            }
            .cta-banner p {
                font-size: 14px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0d1b2a;
            color: rgba(255,255,255,0.6);
            padding: 64px 0 24px;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand .logo-text {
            color: #fff;
        }
        .footer-brand p {
            line-height: 1.8;
            margin-bottom: 16px;
            font-size: 13.5px;
        }
        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255,255,255,0.6);
            font-size: 14px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-links a::before {
            content: '›';
            font-size: 15px;
            color: var(--primary);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 13.5px;
        }
        .footer-contact i {
            color: var(--primary);
            font-size: 14px;
            width: 20px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom p {
            margin: 0;
        }

        @media screen and (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media screen and (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            justify-content: center;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(13, 110, 110, 0.2);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(13, 110, 110, 0.3);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn:focus-visible {
            outline: 3px solid rgba(13, 110, 110, 0.4);
            outline-offset: 2px;
        }

/* roulang page: category1 */
/* ========== 设计变量与基础 ========== */
:root {
  --primary: #0b6e8f;
  --primary-dark: #0a4f6a;
  --primary-light: #12a4c9;
  --accent: #f0a500;
  --accent-dark: #d18a00;
  --accent-light: #ffe6a8;
  --bg: #f5f7fa;
  --bg-deep: #0a1c2e;
  --text-main: #101828;
  --text-sub: #5a6b7a;
  --border: #dfe6ec;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 12px rgba(9, 30, 66, 0.08);
  --shadow-md: 0 8px 28px rgba(9, 30, 66, 0.10);
  --shadow-lg: 0 18px 50px rgba(9, 30, 66, 0.14);
  --section-space: clamp(64px, 8vw, 110px);
  --container-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: inherit;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-main);
  margin: 0 0 0.6em;
}

p {
  margin: 0 0 1em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

img {
  max-width: 100%;
  height: auto;
  border: 0;
  display: block;
}

ul, ol {
  margin: 0;
  padding: 0;
}

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

.grid-container {
  max-width: var(--container-width) !important;
  padding-left: 20px !important;
  padding-right: 20px !important;
}

/* ========== 顶部信息条 ========== */
.site-header {
  position: relative;
  z-index: 100;
}

.topbar {
  background: var(--bg-deep);
  color: #cbd5e1;
  font-size: 13px;
  padding: 8px 0;
  letter-spacing: 0.02em;
}

.topbar-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.topbar-item i {
  color: var(--primary-light);
  font-size: 14px;
}

/* ========== 主导航 ========== */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 18px rgba(9, 30, 66, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  box-shadow: 0 4px 12px rgba(11, 110, 143, 0.30);
}

.logo-text {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.01em;
}

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

.nav-list a {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border-radius: 999px;
  color: var(--text-sub);
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
}

.nav-list a:hover {
  background: #eef7fa;
  color: var(--primary);
}

.nav-list a.active {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(11, 110, 143, 0.28);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-cta {
  padding: 10px 22px;
  font-size: 14px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-main);
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all 0.25s ease;
}

.menu-toggle:hover {
  background: #f0f6f8;
  color: var(--primary);
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(11, 110, 143, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(11, 110, 143, 0.35);
  color: #ffffff;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(11, 110, 143, 0.25);
}

.btn-ghost {
  border: 2px solid rgba(255, 255, 255, 0.82);
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(6px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(240, 165, 0, 0.30);
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(240, 165, 0, 0.40);
  color: #ffffff;
}

.btn:focus-visible {
  outline: 3px solid rgba(18, 164, 201, 0.45);
  outline-offset: 2px;
}

/* ========== 页面 Banner ========== */
.page-hero {
  position: relative;
  padding: 90px 0 84px;
  color: #ffffff;
  background: linear-gradient(rgba(8, 24, 38, 0.84), rgba(8, 24, 38, 0.72)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top right, rgba(18, 164, 201, 0.30), transparent 55%);
  pointer-events: none;
}

.page-hero .grid-container {
  position: relative;
  z-index: 1;
}

.breadcrumb {
  margin-bottom: 32px;
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li:not(:first-child)::before {
  content: "›";
  color: rgba(255, 255, 255, 0.40);
  font-size: 16px;
  line-height: 1;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.75);
}

.breadcrumb a:hover {
  color: #ffffff;
}

.breadcrumb li[aria-current="page"] {
  color: var(--accent-light);
  font-weight: 600;
}

.hero-content {
  max-width: 760px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.20);
}

.hero-badge i {
  color: var(--accent-light);
}

.hero-content h1 {
  font-size: clamp(30px, 5vw, 48px);
  color: #ffffff;
  margin-bottom: 18px;
  line-height: 1.2;
}

.hero-content p {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  max-width: 640px;
  margin-bottom: 30px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

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

/* ========== 通用板块 ========== */
.section {
  padding: var(--section-space) 0;
}

.section + .section {
  border-top: 1px solid var(--border);
}

.section-head {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 48px;
}

.section-head h2 {
  font-size: clamp(28px, 4vw, 38px);
  color: var(--text-main);
  margin-bottom: 14px;
}

.section-head p {
  color: var(--text-sub);
  font-size: 16px;
  line-height: 1.8;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 999px;
  background: #e8f5f8;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

.section-head.light h2 {
  color: #ffffff;
}

.section-head.light p {
  color: rgba(255, 255, 255, 0.72);
}

.section-tag.light-tag {
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.18);
}

/* ========== 指南概览 ========== */
.guide-intro-section {
  background: #ffffff;
}

.guide-intro {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
}

.intro-copy .section-tag {
  margin-bottom: 12px;
}

.intro-copy h2 {
  font-size: clamp(26px, 3.6vw, 36px);
  margin-bottom: 16px;
}

.intro-copy p {
  color: var(--text-sub);
  font-size: 16px;
  line-height: 1.85;
  margin-bottom: 24px;
}

.intro-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.intro-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-weight: 500;
  color: var(--text-main);
}

.intro-points i {
  color: var(--primary-light);
  font-size: 19px;
  margin-top: 3px;
  flex-shrink: 0;
}

.intro-media {
  position: relative;
}

.intro-media img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
}

.intro-float-card {
  position: absolute;
  bottom: 22px;
  left: -26px;
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 18px 22px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 240px;
}

.float-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.intro-float-card strong {
  display: block;
  font-size: 15px;
  color: var(--text-main);
}

.intro-float-card p {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--text-sub);
}

/* ========== 核心流程 ========== */
.steps-section {
  background: var(--bg);
}

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

.step-card {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px 26px 28px;
  text-align: center;
  overflow: hidden;
  transition: all 0.35s ease;
}

.step-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: #b8e2ec;
}

.step-num {
  position: absolute;
  top: 14px;
  left: 22px;
  font-size: 46px;
  font-weight: 900;
  color: #edf2f5;
  line-height: 1;
  pointer-events: none;
}

.step-icon {
  width: 64px;
  height: 64px;
  margin: 6px auto 18px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #e8f6fa, #d3ebf2);
  color: var(--primary);
  font-size: 24px;
}

.step-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ========== 内容模块 ========== */
.modules-section {
  background: #ffffff;
}

.mod-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.mod-card {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}

.mod-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: #c9dce3;
}

.mod-thumb {
  position: relative;
  height: 210px;
  overflow: hidden;
}

.mod-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.mod-card:hover .mod-thumb img {
  transform: scale(1.05);
}

.mod-thumb::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(8, 24, 38, 0.35), transparent 60%);
  pointer-events: none;
}

.mod-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

.mod-body {
  padding: 24px 26px 26px;
}

.mod-body h3 {
  font-size: 20px;
  margin-bottom: 10px;
}

.mod-body p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 18px;
}

.mod-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
}

.mod-link:hover {
  gap: 10px;
  color: var(--primary-dark);
}

.mod-link:focus-visible {
  outline: 3px solid rgba(18, 164, 201, 0.35);
  outline-offset: 4px;
  border-radius: 4px;
}

/* ========== 数据 / 安全巡检 ========== */
.stats-section {
  position: relative;
  padding: var(--section-space) 0;
  color: #ffffff;
  background: linear-gradient(rgba(8, 24, 38, 0.84), rgba(8, 24, 38, 0.74)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
}

.stats-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at bottom left, rgba(240, 165, 0, 0.14), transparent 50%);
  pointer-events: none;
}

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

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

.stat-item {
  text-align: center;
  padding: 34px 20px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(4px);
  transition: background 0.3s ease, transform 0.3s ease;
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-4px);
}

.stat-num {
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 900;
  color: #ffffff;
  line-height: 1.1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
}

/* ========== 安全清单 ========== */
.safety-section {
  background: #ffffff;
}

.safety-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 980px;
  margin: 0 auto;
}

.safety-card {
  background: #f7fafb;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 32px 28px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

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

.safety-accent {
  background: #fffbf1;
  border-color: #f3e0b4;
}

.safety-head {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
}

.safety-head i {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  color: #ffffff;
  font-size: 17px;
}

.safety-accent .safety-head i {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.check-list li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.7;
}

.check-list li::before {
  content: "✔";
  position: absolute;
  left: 0;
  top: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(18, 164, 201, 0.12);
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.safety-accent .check-list li::before {
  background: rgba(240, 165, 0, 0.14);
  color: var(--accent-dark);
}

/* ========== FAQ ========== */
.faq-section {
  background: var(--bg);
}

.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.faq-item:hover {
  border-color: #cbdce2;
  box-shadow: var(--shadow-sm);
}

.faq-item.open {
  border-color: #a8dce8;
  box-shadow: var(--shadow-md);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  transition: color 0.25s ease;
}

.faq-q:hover {
  color: var(--primary);
}

.faq-q:focus-visible {
  outline: 3px solid rgba(18, 164, 201, 0.35);
  outline-offset: -2px;
}

.faq-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #e8f5f8;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: background 0.3s ease, transform 0.3s ease;
}

.faq-item.open .faq-icon {
  background: var(--primary);
  color: #ffffff;
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-a p {
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.8;
  margin: 0;
}

/* ========== CTA ========== */
.cta-section {
  padding: var(--section-space) 0;
  background: linear-gradient(135deg, #0d2a3e, #0a4f6a);
}

.cta-card {
  position: relative;
  background: linear-gradient(rgba(8, 24, 38, 0.72), rgba(8, 24, 38, 0.72)), url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  border-radius: var(--radius-lg);
  padding: clamp(36px, 5vw, 60px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.cta-content {
  max-width: 640px;
}

.cta-content h2 {
  color: #ffffff;
  font-size: clamp(24px, 3.4vw, 34px);
  margin-bottom: 12px;
}

.cta-content p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 0;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  flex-shrink: 0;
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--bg-deep);
  color: #aebccb;
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo-text {
  color: #ffffff;
}

.footer-brand p {
  margin: 16px 0 0;
  color: #9aaab8;
  max-width: 320px;
  line-height: 1.8;
  font-size: 14px;
}

.footer-title {
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}

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

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #9aaab8;
  font-size: 14px;
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.footer-links a:hover {
  color: #ffffff;
  padding-left: 4px;
}

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

.footer-contact li {
  padding: 7px 0;
  color: #9aaab8;
  font-size: 14px;
}

.footer-contact i {
  width: 22px;
  color: var(--primary-light);
  margin-right: 6px;
}

.footer-bottom {
  padding: 22px 0;
  text-align: center;
  color: #7e8e9c;
  font-size: 14px;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .intro-float-card {
    left: 12px;
  }
}

@media (max-width: 900px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav-cta {
    display: none;
  }

  .nav-list {
    position: absolute;
    top: calc(100% + 0px);
    left: 20px;
    right: 20px;
    background: #ffffff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 10px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    display: none;
    z-index: 99;
    border: 1px solid var(--border);
  }

  .nav-list.open {
    display: flex;
  }

  .nav-list a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
  }

  .nav-list a.active {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: #ffffff;
  }

  .guide-intro {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .intro-float-card {
    left: 16px;
    bottom: 16px;
  }

  .hero-content h1 {
    font-size: 36px;
  }
}

@media (max-width: 768px) {
  .page-hero {
    padding: 64px 0 60px;
  }

  .page-hero p br {
    display: none;
  }

  .section {
    padding: 64px 0;
  }

  .section-head {
    margin-bottom: 36px;
  }

  .mod-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .mod-thumb {
    height: 190px;
  }

  .safety-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .cta-card {
    padding: 32px 24px;
  }

  .cta-actions {
    width: 100%;
  }

  .cta-actions .btn {
    flex: 1;
    min-width: 160px;
  }
}

@media (max-width: 520px) {
  .topbar {
    font-size: 12px;
    padding: 6px 0;
  }

  .logo-text {
    font-size: 19px;
  }

  .logo-icon {
    width: 38px;
    height: 38px;
    font-size: 17px;
  }

  .main-nav {
    min-height: 64px;
  }

  .nav-inner {
    min-height: 64px;
  }

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

  .hero-content h1 {
    font-size: 30px;
  }

  .hero-content p {
    font-size: 15px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .hero-meta {
    gap: 12px 18px;
  }

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

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .stat-item {
    padding: 24px 16px;
  }

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

  .grid-container {
    padding-left: 16px !important;
    padding-right: 16px !important;
  }
}