/* roulang page: index */
:root {
    --primary: #F25C2A;
    --primary-hover: #FF7A4D;
    --secondary: #0F4C5C;
    --secondary-hover: #1A6172;
    --bg: #F8F4EE;
    --bg-white: #FFFFFF;
    --accent: #F5B82E;
    --ink: #1F2937;
    --ink-soft: #6B7280;
    --border: #E5E0D8;
    --radius-card: 16px;
    --radius-img: 12px;
    --radius-btn: 999px;
    --radius-input: 12px;
    --shadow-card: 0 8px 24px rgba(15,76,92,0.08);
    --shadow-hover: 0 12px 36px rgba(15,76,92,0.16);
    --transition: all .3s ease;
    --font-main: "PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    --font-mono: "SF Mono","Consolas","Liberation Mono",monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); font-size: 16px; line-height: 1.75; color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 48px; }
.section-head h2 { font-size: 30px; line-height: 1.3; color: var(--secondary); margin-bottom: 10px; font-weight: 700; }
.section-head p { font-size: 16px; color: var(--ink-soft); line-height: 1.7; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-btn); font-weight: 600; font-size: 16px; cursor: pointer; border: 2px solid transparent; transition: var(--transition); justify-content: center; }
.btn:focus-visible { outline: 3px solid rgba(242,92,42,.4); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(242,92,42,.3); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.8); }
.btn-outline:hover { background: rgba(255,255,255,.15); border-color: #fff; transform: translateY(-2px); }
.btn-lg { padding: 16px 40px; font-size: 18px; }
.btn-block { width: 100%; }
.btn-captcha { background: var(--secondary); color: #fff; border: none; border-radius: 12px 12px 12px 12px; padding: 10px 18px; font-size: 14px; cursor: pointer; white-space: nowrap; transition: var(--transition); height: 48px; }
.btn-captcha:hover { background: var(--secondary-hover); }
.site-header { background: var(--bg); height: 76px; border-bottom: 1px solid transparent; transition: var(--transition); position: relative; z-index: 100; }
.site-header.scrolled { position: fixed; top: 0; left: 0; width: 100%; background: rgba(248,244,238,.97); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); box-shadow: 0 4px 16px rgba(0,0,0,.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 30px; }
.logo { font-size: 22px; font-weight: 800; color: var(--secondary); letter-spacing: 1px; white-space: nowrap; }
.logo:hover { color: var(--primary); }
.main-nav { display: flex; align-items: center; gap: 28px; flex: 1; justify-content: center; }
.main-nav a { font-size: 16px; font-weight: 500; color: var(--ink); position: relative; padding: 8px 0; }
.main-nav a::after { content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 3px; background: var(--primary); border-radius: 3px; transition: var(--transition); }
.main-nav a:hover { color: var(--primary); }
.main-nav a:hover::after { width: 100%; }
.main-nav a.active { color: var(--secondary); font-weight: 700; }
.main-nav a.active::after { width: 100%; background: var(--primary); }
.nav-cta { flex-shrink: 0; }
.menu-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--secondary); cursor: pointer; }
.countdown-bar { background: var(--secondary); padding: 12px 0; color: #fff; }
.countdown-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.countdown-label { font-size: 15px; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.countdown-label i { color: var(--accent); }
.countdown-timer { display: flex; align-items: center; gap: 4px; font-family: var(--font-mono); }
.cd-item { background: rgba(255,255,255,.12); border-radius: 8px; padding: 4px 10px; display: flex; align-items: baseline; gap: 2px; }
.cd-item span { font-size: 20px; font-weight: 700; color: var(--accent); line-height: 1.2; }
.cd-item i { font-style: normal; font-size: 12px; color: rgba(255,255,255,.8); }
.cd-sep { font-size: 18px; color: rgba(255,255,255,.5); }
.hero { position: relative; min-height: 560px; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
.hero-bg::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(15,76,92,.85) 0%, rgba(15,76,92,.55) 55%, rgba(15,76,92,.35) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 720px; color: #fff; padding: 60px 24px; }
.hero-badge { display: inline-block; background: var(--accent); color: var(--secondary); font-size: 13px; font-weight: 700; padding: 6px 16px; border-radius: 20px; margin-bottom: 20px; letter-spacing: 1px; }
.hero h1 { font-size: 44px; line-height: 1.2; font-weight: 800; color: #fff; margin-bottom: 16px; }
.hero-sub { font-size: 18px; line-height: 1.6; color: rgba(255,255,255,.9); margin-bottom: 28px; max-width: 560px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-meta { display: flex; gap: 28px; flex-wrap: wrap; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.25); }
.hero-meta span { font-size: 14px; color: rgba(255,255,255,.85); display: flex; align-items: center; gap: 6px; }
.hero-meta i { color: var(--accent); }
.features-section { background: var(--bg); }
.feature-row { align-items: stretch; }
.feature-row .columns { display: flex; }
.feature-card { background: var(--bg-white); border-radius: var(--radius-card); padding: 36px 28px; box-shadow: var(--shadow-card); transition: var(--transition); display: flex; flex-direction: column; width: 100%; }
.feature-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.feature-card-center { margin-top: 24px; }
.feature-card-tight { padding: 30px 22px; }
.feature-icon { width: 56px; height: 56px; border-radius: 16px; background: rgba(242,92,42,.12); display: flex; align-items: center; justify-content: center; color: var(--primary); font-size: 22px; margin-bottom: 20px; }
.feature-card:nth-child(2) .feature-icon { background: rgba(15,76,92,.12); color: var(--secondary); }
.feature-card:nth-child(3) .feature-icon { background: rgba(245,184,46,.15); color: #C9961E; }
.feature-card h3 { font-size: 20px; color: var(--secondary); font-weight: 700; margin-bottom: 12px; }
.feature-card p { font-size: 14px; color: var(--ink-soft); line-height: 1.7; margin-bottom: 8px; }
.feature-card a { margin-top: auto; font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.feature-card a:hover { color: var(--secondary); }
.gallery-section { background: var(--bg-white); }
.gallery-row-1, .gallery-row-2 { margin-bottom: 24px; }
.gallery-item { position: relative; border-radius: var(--radius-img); overflow: hidden; aspect-ratio: 4/3; box-shadow: var(--shadow-card); transition: var(--transition); cursor: pointer; }
.gallery-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.gallery-item:hover img { transform: scale(1.05); }
.gallery-overlay { position: absolute; left: 0; right: 0; bottom: 0; padding: 16px 20px; background: linear-gradient(transparent, rgba(15,76,92,.75)); color: #fff; font-weight: 600; font-size: 15px; opacity: 0; transform: translateY(8px); transition: var(--transition); }
.gallery-item:hover .gallery-overlay { opacity: 1; transform: translateY(0); }
.gallery-offset-down { margin-top: 24px; }
.cta-section { background: var(--secondary); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; top: -60px; right: -60px; width: 220px; height: 220px; border-radius: 50%; background: rgba(245,184,46,.08); }
.cta-section::after { content: ''; position: absolute; bottom: -40px; left: 10%; width: 140px; height: 140px; border-radius: 50%; background: rgba(242,92,42,.1); }
.cta-row { position: relative; z-index: 2; align-items: center; }
.cta-content h2 { font-size: 32px; color: #fff; font-weight: 800; margin-bottom: 16px; line-height: 1.3; }
.cta-content p { color: rgba(255,255,255,.85); font-size: 16px; line-height: 1.8; margin-bottom: 20px; }
.cta-content ul { list-style: none; padding: 0; }
.cta-content ul li { color: rgba(255,255,255,.9); font-size: 15px; margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.cta-content ul li i { color: var(--accent); }
.cta-form-card { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2); border-radius: var(--radius-card); padding: 32px; backdrop-filter: blur(4px); }
.cta-form-card h3 { color: #fff; font-size: 22px; font-weight: 700; margin-bottom: 20px; }
.cta-form-card label { color: rgba(255,255,255,.9); font-size: 14px; font-weight: 500; display: block; margin-bottom: 14px; }
.cta-form-card input { width: 100%; height: 48px; border: 1px solid rgba(255,255,255,.3); background: rgba(255,255,255,.1); border-radius: var(--radius-input); padding: 0 14px; color: #fff; font-size: 15px; transition: var(--transition); margin-top: 6px; }
.cta-form-card input::placeholder { color: rgba(255,255,255,.5); }
.cta-form-card input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px rgba(242,92,42,.25); background: rgba(255,255,255,.15); }
.captcha-row { display: flex; gap: 10px; align-items: flex-end; margin-bottom: 16px; }
.captcha-row label { flex: 1; margin-bottom: 0; }
.cta-form-card .btn-submit { margin-top: 8px; height: 52px; font-size: 18px; }
.news-section { background: var(--bg); }
.news-row .columns { display: flex; }
.news-card { background: var(--bg-white); border-radius: var(--radius-card); padding: 28px 24px; box-shadow: var(--shadow-card); transition: var(--transition); display: flex; flex-direction: column; width: 100%; border-top: 3px solid transparent; }
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-top-color: var(--primary); }
.news-tag { display: inline-block; background: rgba(245,184,46,.2); color: #B87E10; font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 4px; align-self: flex-start; margin-bottom: 14px; }
.news-card h3 { font-size: 18px; font-weight: 700; color: var(--ink); line-height: 1.4; margin-bottom: 10px; }
.news-card h3 a:hover { color: var(--primary); }
.news-card p { font-size: 14px; color: var(--ink-soft); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 16px; flex: 1; }
.news-foot { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; border-top: 1px solid #F0EBE4; }
.news-date { font-size: 13px; color: var(--ink-soft); display: flex; align-items: center; gap: 4px; }
.news-more { font-size: 14px; font-weight: 600; color: var(--secondary); display: inline-flex; align-items: center; gap: 4px; }
.news-more:hover { color: var(--primary); }
.news-empty { background: var(--bg-white); border: 1px dashed var(--border); border-radius: var(--radius-card); padding: 40px; text-align: center; color: var(--ink-soft); font-size: 15px; width: 100%; }
.faq-section { background: var(--bg-white); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-card); margin-bottom: 14px; overflow: hidden; transition: var(--transition); background: var(--bg-white); }
.faq-item.active { border-color: var(--secondary); box-shadow: var(--shadow-card); }
.faq-q { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; cursor: pointer; font-size: 16px; font-weight: 600; color: var(--ink); transition: var(--transition); min-height: 56px; }
.faq-q:hover { color: var(--primary); }
.faq-item.active .faq-q { color: var(--primary); }
.faq-icon { position: relative; width: 24px; height: 24px; flex-shrink: 0; }
.faq-icon::before, .faq-icon::after { content: ''; position: absolute; background: var(--ink-soft); transition: var(--transition); border-radius: 2px; }
.faq-icon::before { top: 11px; left: 4px; width: 16px; height: 2px; }
.faq-icon::after { top: 4px; left: 11px; width: 2px; height: 16px; }
.faq-item.active .faq-icon::before, .faq-item.active .faq-icon::after { background: var(--primary); }
.faq-item.active .faq-icon::after { transform: rotate(90deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; padding: 0 24px; }
.faq-item.active .faq-a { max-height: 320px; padding: 4px 24px 20px; }
.faq-a ol { padding-left: 18px; margin: 0; }
.faq-a ol li { font-size: 15px; color: var(--ink-soft); line-height: 1.8; margin-bottom: 4px; }
.faq-a p { font-size: 15px; color: var(--ink-soft); line-height: 1.8; }
.site-footer { background: #0A2C35; color: rgba(255,255,255,.75); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.footer-brand .logo { color: #fff; font-size: 22px; font-weight: 800; margin-bottom: 12px; display: block; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.6); max-width: 280px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.footer-col ul { list-style: none; padding: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 14px; color: rgba(255,255,255,.65); }
.footer-col ul a:hover { color: var(--accent); }
.footer-contact li { font-size: 14px; color: rgba(255,255,255,.65); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.footer-contact i { color: var(--accent); width: 18px; text-align: center; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; text-align: center; font-size: 13px; color: rgba(255,255,255,.45); display: flex; justify-content: center; align-items: center; gap: 12px; }
.back-top { position: fixed; right: 30px; bottom: 30px; width: 44px; height: 44px; border-radius: 50%; background: var(--primary); color: #fff; border: none; font-size: 18px; cursor: pointer; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 16px rgba(242,92,42,.35); transition: var(--transition); opacity: 0; visibility: hidden; z-index: 99; }
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--primary-hover); transform: translateY(-3px); }
.back-top:focus-visible { outline: 3px solid rgba(242,92,42,.4); outline-offset: 2px; }

@media (max-width: 75em) {
    .container { padding: 0 20px; }
    .main-nav { gap: 18px; }
}
@media (max-width: 64em) {
    .main-nav { gap: 12px; }
    .main-nav a { font-size: 15px; }
    .logo { font-size: 20px; }
    .feature-card { padding: 28px 22px; }
    .cta-form-card { padding: 24px; }
    .html { font-size: 15px; }
}
@media (max-width: 52em) {
    .menu-toggle { display: block; }
    .main-nav { position: absolute; top: 76px; left: 0; width: 100%; background: var(--bg-white); flex-direction: column; padding: 20px 24px; gap: 6px; box-shadow: 0 12px 32px rgba(0,0,0,.08); display: none; border-radius: 0 0 16px 16px; }
    .main-nav.open { display: flex; }
    .main-nav a { padding: 12px 0; font-size: 16px; width: 100%; border-bottom: 1px solid #F0EBE4; }
    .main-nav a::after { display: none; }
    .nav-cta { display: inline-flex; }
    .header-inner { gap: 12px; }
    .hero { min-height: 480px; }
    .hero h1 { font-size: 32px; }
    .hero-sub { font-size: 16px; }
    .section { padding: 56px 0; }
    .section-head h2 { font-size: 26px; }
    .feature-row .columns { flex: none; max-width: 100%; width: 100%; }
    .gallery-row-1 .columns, .gallery-row-2 .columns { width: 100%; }
    .gallery-offset-down { margin-top: 0; }
    .cta-row .columns { width: 100%; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
    .news-row .columns { width: 100%; }
}
@media (max-width: 40em) {
    .container { padding: 0 16px; }
    .logo { font-size: 18px; }
    .btn-lg { padding: 14px 28px; font-size: 16px; }
    .countdown-inner { justify-content: center; text-align: center; }
    .cd-item span { font-size: 16px; }
    .hero h1 { font-size: 28px; }
    .hero-sub { font-size: 15px; }
    .hero-actions { flex-direction: column; }
    .hero-meta { gap: 14px; }
    .footer-grid { grid-template-columns: 1fr; }
    .captcha-row { flex-direction: column; align-items: stretch; }
    .btn-captcha { width: 100%; height: 44px; }
    .faq-q { font-size: 15px; padding: 16px 18px; }
    .faq-icon { width: 18px; height: 18px; }
    .back-top { right: 20px; bottom: 20px; }
    .news-card { padding: 22px 18px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #F25C2A;
            --primary-dark: #E04E1D;
            --primary-light: #FF7A4D;
            --secondary: #0F4C5C;
            --secondary-dark: #0A3844;
            --secondary-light: #1A6072;
            --accent: #F5B82E;
            --bg: #F8F4EE;
            --bg-white: #FFFFFF;
            --text-main: #1F2937;
            --text-sub: #6B7280;
            --text-light: #9CA3AF;
            --border: #E5E7EB;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 4px 12px rgba(15, 76, 92, 0.06);
            --shadow-md: 0 8px 24px rgba(15, 76, 92, 0.08);
            --shadow-lg: 0 12px 36px rgba(15, 76, 92, 0.16);
            --transition: all 0.3s ease;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-main);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ===== 页头导航 ===== */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--bg);
            border-bottom: 1px solid rgba(15, 76, 92, 0.08);
            transition: var(--transition);
            box-shadow: 0 2px 12px rgba(15, 76, 92, 0.04);
            height: 76px;
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            position: relative;
            z-index: 2;
        }

        .logo::before {
            content: "";
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 8px;
            display: inline-block;
            flex-shrink: 0;
            box-shadow: var(--shadow-sm);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .main-nav a {
            font-size: 16px;
            color: var(--text-main);
            font-weight: 500;
            line-height: 76px;
            position: relative;
            white-space: nowrap;
        }

        .main-nav a::after {
            content: "";
            position: absolute;
            bottom: 12px;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
            border-radius: 2px;
        }

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

        .main-nav a:hover::after {
            transform: scaleX(1);
        }

        .main-nav a.active {
            color: var(--secondary);
            font-weight: 700;
        }

        .main-nav a.active::after {
            transform: scaleX(1);
        }

        .nav-cta {
            background: var(--primary);
            color: #fff;
            border-radius: 999px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 16px;
            line-height: 1.2;
            box-shadow: 0 6px 18px rgba(242, 92, 42, 0.35);
            transition: var(--transition);
        }

        .nav-cta:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(242, 92, 42, 0.4);
        }

        .nav-cta::after {
            display: none;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            padding: 8px;
            background: transparent;
            border: none;
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
            transition: var(--transition);
            display: block;
        }

        /* ===== 页面 Hero ===== */
        .page-hero {
            background: linear-gradient(105deg, rgba(15, 76, 92, 0.92) 0%, rgba(15, 76, 92, 0.7) 45%, rgba(15, 76, 92, 0.35) 100%),
                url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 110px 0 100px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: -50px;
            right: -50px;
            width: 240px;
            height: 240px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero-content {
            max-width: 720px;
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: #1F2937;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            box-shadow: 0 4px 12px rgba(245, 184, 46, 0.3);
        }

        .page-hero h1 {
            font-size: 44px;
            line-height: 1.2;
            color: #fff;
            font-weight: 800;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .page-hero p {
            font-size: 18px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            max-width: 620px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 999px;
            font-size: 16px;
            font-weight: 600;
            line-height: 1.2;
            transition: var(--transition);
            cursor: pointer;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 24px rgba(242, 92, 42, 0.35);
        }

        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(242, 92, 42, 0.45);
            color: #fff;
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.8);
            color: #fff;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: translateY(-3px);
        }

        .btn-outline {
            border-color: var(--secondary);
            color: var(--secondary);
            background: transparent;
        }

        .btn-outline:hover {
            background: var(--secondary);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .btn-lg {
            padding: 17px 44px;
            font-size: 18px;
        }

        /* ===== 区块通用 ===== */
        .section {
            padding: 90px 0;
        }

        .section-bg-alt {
            background: var(--bg-white);
        }

        .section-header {
            margin-bottom: 50px;
            position: relative;
        }

        .section-header h2 {
            font-size: 32px;
            line-height: 1.3;
            color: var(--secondary);
            font-weight: 800;
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: "";
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-sub);
            margin-top: 16px;
        }

        .center-header {
            text-align: center;
        }

        .center-header h2::after {
            left: 50%;
            transform: translateX(-50%);
        }

        /* ===== 图文长列表 ===== */
        .guide-section {
            background: var(--bg);
        }

        .guide-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .guide-item {
            display: flex;
            gap: 24px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 30px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border-left: 4px solid transparent;
            margin-bottom: 20px;
            position: relative;
        }

        .guide-item:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-left-color: var(--primary);
        }

        .guide-num {
            font-size: 38px;
            font-weight: 800;
            color: rgba(15, 76, 92, 0.15);
            line-height: 1;
            min-width: 70px;
            font-family: "Courier New", monospace;
        }

        .guide-content {
            flex: 1;
        }

        .guide-content h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .guide-content p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .guide-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }

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

        /* 右侧阶梯图卡 */
        .side-cards {
            display: flex;
            flex-direction: column;
            gap: 28px;
            padding-left: 10px;
        }

        .side-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            position: relative;
        }

        .side-card:nth-child(1) {
            margin-top: 0;
        }

        .side-card:nth-child(2) {
            margin-top: 18px;
        }

        .side-card:nth-child(3) {
            margin-top: 36px;
        }

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

        .side-card-img {
            position: relative;
            height: 170px;
            overflow: hidden;
        }

        .side-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .side-card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(15, 76, 92, 0.65));
        }

        .side-card-body {
            padding: 20px 24px 24px;
        }

        .side-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .side-card-body p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
        }

        .side-card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            background: var(--accent);
            color: #1F2937;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 999px;
        }

        /* ===== 分割图 ===== */
        .divider-banner {
            background: linear-gradient(100deg, rgba(15, 76, 92, 0.88) 0%, rgba(10, 56, 68, 0.75) 100%),
                url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 70px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .divider-banner::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 2px;
            height: 40px;
            background: rgba(255, 255, 255, 0.3);
        }

        .divider-banner h2 {
            color: #fff;
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .divider-banner p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
        }

        .divider-badge {
            display: inline-block;
            background: var(--accent);
            color: #1F2937;
            font-size: 13px;
            font-weight: 700;
            padding: 5px 18px;
            border-radius: 999px;
            margin-bottom: 18px;
        }

        /* ===== 适用场景 ===== */
        .scenes-section {
            background: var(--bg-white);
        }

        .scene-card {
            background: var(--bg);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            transition: var(--transition);
            border: 1px solid transparent;
            height: 100%;
        }

        .scene-card:hover {
            border-color: rgba(242, 92, 42, 0.3);
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
        }

        .scene-icon {
            width: 64px;
            height: 64px;
            background: var(--secondary);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: #fff;
            font-size: 26px;
            box-shadow: 0 8px 20px rgba(15, 76, 92, 0.25);
        }

        .scene-icon.orange {
            background: var(--primary);
            box-shadow: 0 8px 20px rgba(242, 92, 42, 0.25);
        }

        .scene-icon.accent-bg {
            background: var(--accent);
            color: #1F2937;
            box-shadow: 0 8px 20px rgba(245, 184, 46, 0.25);
        }

        .scene-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .scene-card p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
        }

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

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-top: 48px;
        }

        .step-item {
            text-align: center;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 40px 24px 36px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
        }

        .step-item:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }

        .step-num {
            width: 52px;
            height: 52px;
            background: var(--secondary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 20px;
            box-shadow: 0 6px 16px rgba(15, 76, 92, 0.3);
            position: relative;
        }

        .step-item:not(:last-child) .step-num::after {
            content: "";
            position: absolute;
            top: 50%;
            left: calc(100% + 30px);
            width: 60px;
            height: 2px;
            background: var(--primary);
            opacity: 0.3;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
        }

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

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-lg);
            margin-bottom: 16px;
            overflow: hidden;
            border: 1px solid rgba(15, 76, 92, 0.06);
            transition: var(--transition);
        }

        .faq-item.active {
            box-shadow: var(--shadow-md);
            border-color: rgba(242, 92, 42, 0.2);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 28px;
            cursor: pointer;
            gap: 16px;
            user-select: none;
        }

        .faq-question h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            transition: var(--transition);
            line-height: 1.4;
        }

        .faq-item.active .faq-question h3 {
            color: var(--primary);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border: 2px solid var(--secondary);
            border-radius: 50%;
            position: relative;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--secondary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .faq-icon::before {
            width: 12px;
            height: 2px;
            top: 11px;
            left: 6px;
        }

        .faq-icon::after {
            width: 2px;
            height: 12px;
            top: 6px;
            left: 11px;
        }

        .faq-item.active .faq-icon {
            border-color: var(--primary);
            transform: rotate(135deg);
        }

        .faq-item.active .faq-icon::before,
        .faq-item.active .faq-icon::after {
            background: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-answer-inner {
            padding: 0 28px 24px;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.75;
        }

        .faq-answer-inner ol {
            list-style: decimal;
            padding-left: 20px;
            margin-top: 8px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(115deg, rgba(15, 76, 92, 0.95) 0%, rgba(26, 96, 114, 0.85) 100%),
                url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            padding: 100px 0;
            text-align: center;
            position: relative;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -40px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 80px;
            border: 2px solid rgba(255, 255, 255, 0.15);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-inner {
            max-width: 680px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 17px;
            margin-bottom: 36px;
        }

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

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0A2E36;
            color: #AFC4C9;
            padding: 80px 0 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 50px;
            padding-bottom: 50px;
        }

        .footer-brand .logo {
            color: #fff;
            font-size: 20px;
            margin-bottom: 16px;
        }

        .footer-brand p {
            line-height: 1.7;
            color: #8FA8AE;
            margin-top: 14px;
            font-size: 14px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 22px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--primary);
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            color: #8FA8AE;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--primary-light);
            padding-left: 6px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #8FA8AE;
        }

        .footer-contact i {
            color: var(--primary);
            width: 18px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, 0.4);
            font-size: 13px;
        }

        .to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 46px;
            height: 46px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: var(--shadow-lg);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }

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

        .to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
        }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 74.9375em) {
            .main-nav {
                gap: 20px;
            }
            .container {
                padding: 0 20px;
            }
        }

        @media screen and (max-width: 63.9375em) {
            .main-header {
                height: 64px;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                gap: 0;
                box-shadow: 0 20px 40px rgba(15, 76, 92, 0.12);
                transform: translateY(-130%);
                transition: transform 0.3s ease;
                z-index: 99;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .main-nav a {
                line-height: 50px;
                padding: 0 16px;
                border-radius: 10px;
                font-size: 16px;
            }
            .main-nav a::after {
                display: none;
            }
            .main-nav a:hover {
                background: rgba(242, 92, 42, 0.08);
            }
            .main-nav a.active {
                background: rgba(242, 92, 42, 0.1);
                color: var(--primary);
            }
            .nav-cta {
                margin-top: 12px;
                text-align: center;
                line-height: 46px;
                border-radius: 999px;
                padding: 0 24px;
                background: var(--primary);
                color: #fff;
            }
            .nav-cta:hover {
                background: var(--primary-light);
                transform: none;
            }
            .page-hero {
                padding: 80px 0 70px;
            }
            .page-hero h1 {
                font-size: 36px;
            }
            .section {
                padding: 65px 0;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .side-cards {
                padding-left: 0;
                flex-direction: row;
                flex-wrap: wrap;
                gap: 20px;
                margin-top: 30px;
            }
            .side-card {
                width: calc(50% - 10px);
                margin-top: 0 !important;
            }
        }

        @media screen and (max-width: 39.9375em) {
            .container {
                padding: 0 16px;
            }
            .page-hero {
                padding: 60px 0 50px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p {
                font-size: 16px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .section {
                padding: 50px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .guide-item {
                flex-direction: column;
                padding: 24px 20px;
                gap: 12px;
            }
            .guide-num {
                font-size: 28px;
                min-width: auto;
            }
            .side-cards {
                flex-direction: column;
            }
            .side-card {
                width: 100%;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .divider-banner {
                padding: 50px 0;
            }
            .divider-banner h2 {
                font-size: 24px;
            }
            .cta-section {
                padding: 70px 0;
            }
            .cta-inner h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 4px;
                text-align: center;
            }
            .to-top {
                bottom: 20px;
                right: 20px;
                width: 40px;
                height: 40px;
            }
        }

/* roulang page: article */
:root {
            --c-primary: #F25C2A;
            --c-primary-hover: #F57342;
            --c-primary-dark: #D94A1E;
            --c-secondary: #0F4C5C;
            --c-secondary-dark: #0A3A47;
            --c-secondary-light: #1A5F6B;
            --c-accent: #F5B82E;
            --c-bg: #F8F4EE;
            --c-white: #FFFFFF;
            --c-text: #1F2937;
            --c-text-light: #6B7280;
            --c-border: #E5E0D8;
            --radius-card: 16px;
            --radius-img: 12px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --shadow-card: 0 8px 24px rgba(15, 76, 92, 0.08);
            --shadow-hover: 0 12px 36px rgba(15, 76, 92, 0.16);
            --shadow-header: 0 4px 20px rgba(15, 76, 92, 0.06);
            --space-section: 80px;
            --space-section-mobile: 48px;
            --font-primary: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-primary);
            font-size: 16px;
            line-height: 1.75;
            color: var(--c-text);
            background-color: var(--c-bg);
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: color .25s ease; }
        ul, ol { list-style: none; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        .container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }

        .seo-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            line-height: 1.2;
            border: 2px solid transparent;
            cursor: pointer;
            transition: all .25s ease;
            text-align: center;
            white-space: nowrap;
            background: transparent;
        }
        .btn-primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
        .btn-primary:hover { background: var(--c-primary-hover); border-color: var(--c-primary-hover); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(242, 92, 42, 0.28); }
        .btn-primary:focus-visible { outline: 3px solid rgba(242, 92, 42, 0.35); outline-offset: 2px; }
        .btn-secondary { background: transparent; color: var(--c-secondary); border-color: var(--c-secondary); }
        .btn-secondary:hover { background: var(--c-secondary); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(15, 76, 92, 0.2); }
        .btn-secondary:focus-visible { outline: 3px solid rgba(15, 76, 92, 0.3); outline-offset: 2px; }
        .btn-lg { padding: 16px 40px; font-size: 18px; }
        .btn-block { width: 100%; justify-content: center; }

        .site-header {
            position: fixed;
            top: 0; left: 0;
            width: 100%;
            height: 76px;
            background: rgba(248, 244, 238, 0.96);
            backdrop-filter: blur(12px);
            z-index: 1000;
            border-bottom: 1px solid transparent;
            transition: box-shadow .3s, border-color .3s;
        }
        .site-header.scrolled { border-bottom-color: rgba(15, 76, 92, 0.08); box-shadow: var(--shadow-header); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 76px;
            position: relative;
        }
        .logo { font-size: 22px; font-weight: 800; color: var(--c-secondary); letter-spacing: .5px; flex-shrink: 0; }
        .logo .logo-dot { color: var(--c-primary); }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            margin: 0 auto;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }
        .main-nav a {
            font-size: 16px;
            color: var(--c-text);
            font-weight: 500;
            position: relative;
            padding: 8px 2px;
            transition: color .25s;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            left: 0; bottom: 0;
            width: 0; height: 3px;
            background: var(--c-primary);
            border-radius: 3px;
            transition: width .25s ease;
        }
        .main-nav a:hover { color: var(--c-secondary); }
        .main-nav a:hover::after { width: 100%; }
        .main-nav a.active { color: var(--c-secondary); font-weight: 700; }
        .main-nav a.active::after { width: 100%; }
        .header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
        .menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px; height: 44px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 10px;
            border-radius: 12px;
            transition: background .25s;
        }
        .menu-toggle:hover { background: rgba(15, 76, 92, 0.06); }
        .menu-toggle span { display: block; height: 2px; background: var(--c-secondary); border-radius: 2px; transition: transform .25s, opacity .25s; }
        .menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .menu-toggle.active span:nth-child(2) { opacity: 0; }
        .menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

        .article-hero {
            padding: 120px 0 40px;
            background: linear-gradient(135deg, rgba(15, 76, 92, 0.06) 0%, rgba(242, 92, 42, 0.04) 100%);
            border-bottom: 1px solid var(--c-border);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            border: 1px solid rgba(15, 76, 92, 0.1);
        }
        .breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 14px; color: var(--c-text-light); margin-bottom: 24px; }
        .breadcrumb a { color: var(--c-secondary); font-weight: 500; }
        .breadcrumb a:hover { color: var(--c-primary); }
        .breadcrumb-sep { color: rgba(107, 114, 128, 0.6); }
        .breadcrumb-h1 {
            font-size: 15px;
            font-weight: 600;
            color: var(--c-text);
            margin: 0;
            display: inline;
        }
        .article-h1 {
            font-size: 40px;
            line-height: 1.2;
            color: var(--c-secondary);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: .5px;
        }
        .article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; font-size: 14px; color: var(--c-text-light); }
        .article-meta i { color: var(--c-primary); margin-right: 6px; }
        .meta-divider { width: 4px; height: 4px; background: rgba(107, 114, 128, 0.5); border-radius: 50%; }

        .article-main { padding: 48px 0 0; }
        .article-wrapper {
            max-width: 860px;
            margin: 0 auto;
            background: var(--c-white);
            border-radius: 20px;
            padding: 48px 60px;
            box-shadow: var(--shadow-card);
        }
        .article-content { font-size: 16px; line-height: 1.85; }
        .article-content h2 {
            font-size: 28px;
            line-height: 1.3;
            color: var(--c-secondary);
            font-weight: 700;
            margin-top: 44px;
            margin-bottom: 16px;
        }
        .article-content h3 {
            font-size: 22px;
            line-height: 1.35;
            color: var(--c-secondary);
            font-weight: 600;
            margin-top: 36px;
            margin-bottom: 12px;
        }
        .article-content p { margin-bottom: 28px; }
        .article-content ul, .article-content ol { margin: 0 0 28px 24px; }
        .article-content ul { list-style: disc; }
        .article-content ol { list-style: decimal; }
        .article-content li { margin-bottom: 8px; }
        .article-content blockquote {
            border-left: 4px solid var(--c-primary);
            padding: 16px 24px;
            background: rgba(242, 92, 42, 0.04);
            border-radius: 0 12px 12px 0;
            margin-bottom: 28px;
            color: var(--c-text);
            font-style: normal;
        }
        .article-content blockquote p { margin-bottom: 0; }
        .article-content img { border-radius: var(--radius-img); margin: 24px 0; width: auto; max-width: 100%; }
        .article-content table { width: 100%; border-collapse: collapse; margin-bottom: 28px; font-size: 15px; border: 1px solid var(--c-border); border-radius: 12px; overflow: hidden; }
        .article-content th { background: var(--c-secondary); color: #fff; padding: 12px 16px; text-align: left; font-weight: 600; }
        .article-content td { padding: 12px 16px; border-bottom: 1px solid var(--c-border); }
        .article-content tr:last-child td { border-bottom: none; }
        .article-content code { background: rgba(15, 76, 92, 0.08); padding: 2px 8px; border-radius: 6px; font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace; font-size: 0.9em; color: var(--c-secondary-dark); }
        .article-content pre { background: #1F2937; color: #F9FAFB; padding: 24px; border-radius: 12px; overflow-x: auto; margin-bottom: 28px; line-height: 1.6; font-size: 14px; }
        .article-content pre code { background: transparent; color: inherit; padding: 0; border-radius: 0; }
        .article-content a { color: var(--c-primary); font-weight: 500; border-bottom: 1px solid rgba(242, 92, 42, 0.3); }
        .article-content a:hover { color: var(--c-primary-dark); border-bottom-color: var(--c-primary-dark); }
        .article-content hr { border: none; border-top: 1px solid var(--c-border); margin: 36px 0; }

        .article-not-found { text-align: center; padding: 60px 0 80px; }
        .not-found-icon { font-size: 56px; color: var(--c-accent); margin-bottom: 16px; }
        .article-not-found h2 { font-size: 26px; color: var(--c-secondary); margin-bottom: 12px; }
        .article-not-found p { color: var(--c-text-light); margin-bottom: 24px; }

        .related-section { padding: 80px 0; background: var(--c-bg); }
        .related-section .section-head { text-align: center; margin-bottom: 44px; }
        .related-section .section-head h2 { font-size: 30px; color: var(--c-secondary); font-weight: 800; }
        .related-section .section-head p { color: var(--c-text-light); margin-top: 6px; }
        .related-grid { margin-top: 8px; }
        .related-card-col { margin-bottom: 24px; }
        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--c-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform .3s ease, box-shadow .3s ease;
            height: 100%;
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .related-thumb { position: relative; aspect-ratio: 16/10; overflow: hidden; background: var(--c-border); }
        .related-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
        .related-card:hover .related-thumb img { transform: scale(1.04); }
        .related-info { padding: 20px 22px 22px; display: flex; flex-direction: column; flex-grow: 1; }
        .related-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--c-secondary-dark);
            background: rgba(245, 184, 46, 0.18);
            padding: 3px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .related-info h3 { font-size: 18px; line-height: 1.4; color: var(--c-text); font-weight: 700; margin-bottom: 8px; transition: color .25s; }
        .related-card:hover .related-info h3 { color: var(--c-primary); }
        .related-info p { font-size: 13px; color: var(--c-text-light); line-height: 1.6; flex-grow: 1; }
        .related-date { display: block; margin-top: 14px; font-size: 13px; color: var(--c-text-light); }
        .related-date i { color: var(--c-primary); margin-right: 6px; }

        .article-back { padding: 0 0 80px; background: var(--c-bg); text-align: center; }
        .btn-back { max-width: 480px; width: 100%; }

        .site-footer { background: var(--c-secondary-dark); color: rgba(255, 255, 255, 0.75); padding: 64px 0 0; }
        .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
        .footer-brand .logo { color: #fff; font-size: 20px; display: inline-block; margin-bottom: 16px; }
        .footer-brand .logo span { color: var(--c-accent); }
        .footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255, 255, 255, 0.6); max-width: 340px; }
        .footer-col h4 { font-size: 16px; color: #fff; font-weight: 600; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul a { font-size: 14px; color: rgba(255, 255, 255, 0.6); transition: color .25s; }
        .footer-col ul a:hover { color: var(--c-accent); }
        .footer-contact li { font-size: 14px; color: rgba(255, 255, 255, 0.6); display: flex; align-items: center; gap: 8px; }
        .footer-contact .fas { color: var(--c-accent); width: 16px; text-align: center; }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .back-to-top {
            position: fixed;
            right: 28px;
            bottom: 28px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--c-primary);
            color: #fff;
            border: none;
            font-size: 18px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 20px rgba(242, 92, 42, 0.3);
            opacity: 0;
            visibility: hidden;
            transform: translateY(16px);
            transition: all .3s ease;
            z-index: 99;
        }
        .back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
        .back-to-top:hover { background: var(--c-primary-hover); transform: translateY(-3px); }

        @media (max-width: 64em) {
            .menu-toggle { display: flex; }
            .main-nav {
                position: fixed;
                top: 76px;
                left: 0;
                width: 100%;
                background: var(--c-white);
                flex-direction: column;
                gap: 4px;
                padding: 16px 24px 24px;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
                transform: translateY(-120%);
                transition: transform .3s ease;
                border-radius: 0 0 20px 20px;
                display: flex;
                align-items: stretch;
            }
            .main-nav.open { transform: translateY(0); }
            .main-nav a { display: block; padding: 14px 16px; border-radius: 12px; font-size: 16px; }
            .main-nav a::after { display: none; }
            .main-nav a:hover { background: rgba(15, 76, 92, 0.06); }
            .main-nav a.active { background: rgba(242, 92, 42, 0.08); color: var(--c-primary); }
            .header-actions .btn-cta { padding: 10px 20px; font-size: 14px; }
        }
        @media (max-width: 40em) {
            .header-actions .btn-cta span { display: none; }
            .header-actions .btn-cta { width: 44px; height: 44px; padding: 0; }
            .article-h1 { font-size: 30px; }
            .article-wrapper { padding: 24px 20px; border-radius: 16px; }
            .article-content h2 { font-size: 23px; }
            .article-content h3 { font-size: 19px; }
            .article-main { padding-top: 24px; }
            .related-section { padding: 48px 0; }
            .article-back { padding-bottom: 48px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .site-footer { padding-top: 48px; }
        }
        @media (max-width: 30em) {
            .footer-grid { grid-template-columns: 1fr; }
            .container { padding-left: 16px; padding-right: 16px; }
        }

/* roulang page: category3 */
:root {
    --primary: #F25C2A;
    --primary-dark: #D94E1E;
    --primary-light: #FF7B4D;
    --secondary: #0F4C5C;
    --secondary-deep: #0A3740;
    --secondary-light: #1A5E70;
    --accent: #F5B82E;
    --bg: #F8F4EE;
    --text: #1F2937;
    --text-light: #6B7280;
    --white: #FFFFFF;
    --border: #E5E0D8;
    --radius: 16px;
    --radius-sm: 12px;
    --shadow: 0 8px 24px rgba(15, 76, 92, 0.08);
    --shadow-hover: 0 12px 36px rgba(15, 76, 92, 0.16);
    --transition: all 0.3s ease;
    --container: 1200px;
    --header-h: 76px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}

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

a { text-decoration: none; color: inherit; transition: var(--transition); }
a:hover, a:focus { outline: none; }
a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 3px solid rgba(242, 92, 42, 0.45);
    outline-offset: 2px;
}

ul, ol { list-style: none; }

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

/* ============ Header ============ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    background: rgba(248, 244, 238, 0.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}
.site-header.scrolled {
    box-shadow: 0 4px 20px rgba(15, 76, 92, 0.08);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 24px;
}
.logo {
    font-size: 22px;
    font-weight: 700;
    color: var(--secondary);
    letter-spacing: 1px;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo::before {
    content: "";
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
    display: inline-block;
    transition: var(--transition);
}
.logo:hover::before { transform: scale(1.3); background: var(--accent); }

.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}
.main-nav a {
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    position: relative;
    padding: 6px 2px;
}
.main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 0;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
    transition: width 0.3s ease;
}
.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}
.main-nav a.active {
    color: var(--secondary);
    font-weight: 700;
}

.btn-nav {
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 999px;
    padding: 10px 28px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.btn-nav:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(242, 92, 42, 0.35);
}
.btn-nav:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(242, 92, 42, 0.25);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--secondary);
    cursor: pointer;
    padding: 8px;
}

/* ============ Page Hero ============ */
.page-hero {
    position: relative;
    background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    padding: 72px 0 96px;
    min-height: 380px;
    display: flex;
    align-items: flex-end;
}
.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(10, 55, 64, 0.82) 0%, rgba(15, 76, 92, 0.62) 50%, rgba(10, 55, 64, 0.38) 100%);
}
.page-hero .container {
    position: relative;
    z-index: 1;
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.72);
    margin-bottom: 20px;
}
.breadcrumb a {
    color: rgba(255, 255, 255, 0.72);
}
.breadcrumb a:hover {
    color: var(--accent);
}
.breadcrumb .sep {
    color: rgba(255, 255, 255, 0.45);
}
.page-hero h1 {
    font-size: 44px;
    line-height: 1.2;
    color: var(--white);
    font-weight: 700;
    max-width: 640px;
    margin-bottom: 16px;
    letter-spacing: 1px;
}
.page-hero-desc {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.85);
    max-width: 560px;
    line-height: 1.7;
}

/* ============ Security Banner ============ */
.security-banner {
    background: var(--secondary);
    padding: 32px 0;
    position: relative;
    overflow: hidden;
}
.security-banner::after {
    content: "";
    position: absolute;
    top: -40px;
    right: -40px;
    width: 160px;
    height: 160px;
    border: 3px solid rgba(245, 184, 46, 0.2);
    border-radius: 50%;
}
.security-banner .inner {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}
.security-banner i {
    font-size: 36px;
    color: var(--accent);
    flex-shrink: 0;
}
.security-banner p {
    color: rgba(255, 255, 255, 0.92);
    font-size: 15px;
    line-height: 1.7;
    flex: 1;
    min-width: 280px;
}
.security-banner .banner-tag {
    display: inline-flex;
    align-items: center;
    background: var(--accent);
    color: var(--secondary-deep);
    font-weight: 700;
    font-size: 13px;
    padding: 6px 16px;
    border-radius: 999px;
    flex-shrink: 0;
}

/* ============ Compare Section ============ */
.compare-section {
    padding: 96px 0 64px;
}
.compare-section .section-head {
    text-align: center;
    margin-bottom: 48px;
}
.compare-section h2 {
    font-size: 32px;
    color: var(--text);
    margin-bottom: 8px;
    line-height: 1.3;
}
.compare-section .section-sub {
    color: var(--text-light);
    font-size: 16px;
    max-width: 640px;
    margin: 0 auto;
}
.compare-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.compare-table {
    width: 100%;
    border-collapse: collapse;
}
.compare-table th,
.compare-table td {
    padding: 18px 24px;
    text-align: left;
    border-bottom: 1px solid #F0EDE8;
}
.compare-table thead th {
    background: var(--secondary);
    color: var(--white);
    font-weight: 600;
    font-size: 15px;
    letter-spacing: 0.5px;
}
.compare-table thead th:first-child {
    border-radius: 0;
}
.compare-table tbody tr:last-child td {
    border-bottom: none;
}
.compare-table tbody tr {
    transition: background 0.2s;
}
.compare-table tbody tr:hover {
    background: rgba(245, 184, 46, 0.06);
}
.compare-table td {
    font-size: 14px;
    color: var(--text);
    vertical-align: middle;
}
.compare-table td:first-child {
    font-weight: 600;
    color: var(--secondary);
    width: 36%;
}
.feature-ok {
    color: #2E8B57;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.feature-ok i {
    font-size: 13px;
}
.feature-no {
    color: #B0857A;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.feature-no i {
    font-size: 13px;
    color: #C77B66;
}

.compare-note {
    margin-top: 20px;
    padding: 16px 24px;
    background: rgba(245, 184, 46, 0.1);
    border-left: 4px solid var(--accent);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text);
    line-height: 1.6;
}

/* ============ Security Blocks ============ */
.security-blocks {
    padding: 64px 0 96px;
}
.security-blocks .section-head {
    margin-bottom: 48px;
}
.security-blocks h2 {
    font-size: 32px;
    color: var(--text);
    margin-bottom: 8px;
    text-align: center;
}
.security-blocks .section-sub {
    color: var(--text-light);
    text-align: center;
    font-size: 16px;
}
.security-blocks .blocks-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 40px;
}
.security-block {
    display: flex;
    align-items: center;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px 32px;
    gap: 24px;
    transition: var(--transition);
    border: 1px solid transparent;
}
.security-block:hover {
    transform: translateY(-3px) translateX(4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(242, 92, 42, 0.2);
}
.block-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: rgba(242, 92, 42, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 24px;
    color: var(--primary);
    transition: var(--transition);
}
.security-block:hover .block-icon {
    background: var(--primary);
    color: var(--white);
    transform: rotate(-6deg) scale(1.05);
}
.block-content {
    flex: 1;
    min-width: 0;
}
.block-content h3 {
    font-size: 19px;
    color: var(--text);
    margin-bottom: 6px;
    line-height: 1.4;
}
.block-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.block-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--secondary);
    font-weight: 600;
    font-size: 14px;
    flex-shrink: 0;
    padding: 8px 16px;
    border-radius: 999px;
    background: rgba(15, 76, 92, 0.06);
    transition: var(--transition);
}
.block-link:hover {
    background: var(--secondary);
    color: var(--white);
    transform: translateX(2px);
}
.block-link i {
    font-size: 13px;
}

/* ============ Showcase ============ */
.security-showcase {
    padding: 0 0 96px;
}
.security-showcase .showcase-card {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.security-showcase img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}
.showcase-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 55, 64, 0.1) 0%, rgba(10, 55, 64, 0.65) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    padding: 40px;
    text-align: center;
}
.showcase-overlay h3 {
    color: var(--white);
    font-size: 28px;
    margin-bottom: 8px;
}
.showcase-overlay p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 15px;
}

/* ============ FAQ ============ */
.faq-section {
    padding: 0 0 96px;
}
.faq-section .section-head {
    text-align: center;
    margin-bottom: 40px;
}
.faq-section h2 {
    font-size: 32px;
    color: var(--text);
    margin-bottom: 8px;
}
.faq-section .section-sub {
    color: var(--text-light);
    font-size: 16px;
}
.faq-list {
    max-width: 820px;
    margin: 0 auto;
}
.faq-item {
    margin-bottom: 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    background: var(--white);
    transition: var(--transition);
}
.faq-item:hover {
    border-color: rgba(242, 92, 42, 0.3);
}
.faq-item.open {
    box-shadow: var(--shadow);
    border-color: rgba(15, 76, 92, 0.15);
}
.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    transition: var(--transition);
}
.faq-question:hover {
    color: var(--primary);
}
.faq-item.open .faq-question {
    color: var(--primary);
}
.faq-icon {
    position: relative;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    margin-left: 16px;
}
.faq-icon::before,
.faq-icon::after {
    content: "";
    position: absolute;
    background: var(--secondary);
    border-radius: 2px;
    transition: var(--transition);
}
.faq-icon::before {
    width: 2px;
    height: 20px;
    left: 9px;
    top: 0;
}
.faq-icon::after {
    width: 20px;
    height: 2px;
    top: 9px;
    left: 0;
}
.faq-item.open .faq-icon::before {
    transform: rotate(90deg);
    opacity: 0;
}
.faq-item.open .faq-icon::after {
    background: var(--primary);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}
.faq-answer-inner {
    padding: 0 24px 20px;
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.8;
    border-top: 1px solid #F0EDE8;
    padding-top: 16px;
}
.faq-answer-inner ol {
    list-style: decimal;
    padding-left: 20px;
}

/* ============ CTA ============ */
.cta-section {
    padding: 0 0 96px;
}
.cta-card {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    padding: 64px 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
}
.cta-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(10, 55, 64, 0.9) 0%, rgba(10, 55, 64, 0.65) 60%, rgba(10, 55, 64, 0.4) 100%);
}
.cta-card .cta-content {
    position: relative;
    z-index: 1;
    flex: 1;
    min-width: 280px;
}
.cta-card h2 {
    color: var(--white);
    font-size: 30px;
    line-height: 1.3;
    margin-bottom: 12px;
}
.cta-card p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 16px;
    max-width: 480px;
    line-height: 1.7;
}
.cta-actions {
    position: relative;
    z-index: 1;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 34px;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.btn-cta-primary {
    background: var(--primary);
    color: var(--white);
}
.btn-cta-primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(242, 92, 42, 0.4);
}
.btn-cta-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.6);
}
.btn-cta-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

/* ============ Footer ============ */
.site-footer {
    background: #0A1F24;
    color: #A8B8BF;
    padding: 64px 0 0;
    font-size: 14px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.4fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .logo {
    color: var(--white);
    font-size: 20px;
    margin-bottom: 16px;
    display: inline-flex;
}
.footer-brand .logo::before {
    background: var(--primary);
}
.footer-brand p {
    color: #A8B8BF;
    line-height: 1.7;
    margin-top: 12px;
    max-width: 320px;
}
.footer-col h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 18px;
    font-weight: 600;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    color: #A8B8BF;
    font-size: 14px;
}
.footer-col ul li a:hover {
    color: var(--accent);
    text-decoration: underline;
}
.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #A8B8BF;
}
.footer-contact li i {
    color: var(--accent);
    width: 18px;
    text-align: center;
}
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 24px 0;
    color: #7A8A90;
    font-size: 13px;
    flex-wrap: wrap;
}
.footer-bottom a {
    color: #7A8A90;
}
.footer-bottom a:hover {
    color: var(--accent);
}

/* ============ Responsive ============ */
@media (max-width: 75em) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 64em) {
    .main-nav {
        gap: 16px;
    }
    .btn-nav {
        padding: 8px 20px;
        font-size: 14px;
    }
    .security-block {
        flex-wrap: wrap;
    }
    .block-link {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 40em) {
    :root {
        --header-h: 64px;
    }
    .menu-toggle {
        display: block;
    }
    .main-nav {
        display: none;
        position: absolute;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        align-items: stretch;
        padding: 16px 20px;
        gap: 12px;
        box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
        border-radius: 0 0 16px 16px;
    }
    .main-nav.open {
        display: flex;
    }
    .main-nav a {
        padding: 10px 12px;
        border-radius: 8px;
        font-size: 16px;
    }
    .main-nav a:hover {
        background: var(--bg);
    }
    .main-nav a::after {
        display: none;
    }
    .main-nav a.active {
        background: rgba(242, 92, 42, 0.08);
    }
    .btn-nav {
        display: none;
    }
    .btn-nav.mobile-visible {
        display: inline-flex;
        margin-top: 8px;
        justify-content: center;
        width: 100%;
    }
    .page-hero {
        padding: 48px 0 64px;
        min-height: 320px;
    }
    .page-hero h1 {
        font-size: 30px;
    }
    .page-hero-desc {
        font-size: 15px;
    }
    .compare-section {
        padding: 60px 0 40px;
    }
    .compare-section h2 {
        font-size: 24px;
    }
    .compare-table th,
    .compare-table td {
        padding: 12px 10px;
        font-size: 12px;
    }
    .compare-table td:first-child {
        width: 30%;
    }
    .security-blocks {
        padding: 40px 0 60px;
    }
    .security-blocks h2 {
        font-size: 24px;
    }
    .security-block {
        padding: 20px;
        gap: 16px;
        flex-wrap: wrap;
    }
    .block-icon {
        width: 52px;
        height: 52px;
        border-radius: 14px;
        font-size: 20px;
    }
    .block-content h3 {
        font-size: 17px;
    }
    .security-showcase {
        padding: 0 0 60px;
    }
    .showcase-overlay h3 {
        font-size: 20px;
    }
    .faq-section {
        padding: 0 0 60px;
    }
    .faq-section h2 {
        font-size: 24px;
    }
    .faq-question {
        font-size: 15px;
        padding: 16px 18px;
    }
    .faq-answer-inner {
        padding: 12px 18px 16px;
        font-size: 14px;
    }
    .cta-section {
        padding: 0 0 60px;
    }
    .cta-card {
        padding: 40px 24px;
        flex-direction: column;
        align-items: flex-start;
    }
    .cta-card h2 {
        font-size: 24px;
    }
    .cta-actions {
        width: 100%;
    }
    .btn-cta {
        width: 100%;
        justify-content: center;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        padding-bottom: 32px;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 6px;
        text-align: center;
    }
    .security-banner .inner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

/* roulang page: category2 */
:root {
            --primary: #F25C2A;
            --primary-hover: #FF6B3D;
            --secondary: #0F4C5C;
            --secondary-hover: #146573;
            --accent: #F5B82E;
            --bg: #F8F4EE;
            --white: #FFFFFF;
            --text: #1F2937;
            --text-light: #6B7280;
            --border: #E5E7EB;
            --radius: 16px;
            --radius-lg: 24px;
            --radius-sm: 12px;
            --shadow: 0 8px 24px rgba(15, 76, 92, 0.08);
            --shadow-hover: 0 12px 36px rgba(15, 76, 92, 0.16);
            --transition: all 0.3s ease;
        }
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: var(--secondary);
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        ul {
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ========== Header & Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg);
            border-bottom: 1px solid rgba(15, 76, 92, 0.08);
            height: 76px;
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 76, 92, 0.1);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 20px;
        }
        .logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--secondary);
        }
        .logo i {
            color: var(--primary);
            margin-right: 6px;
            font-size: 20px;
        }
        .nav-container {
            display: flex;
            align-items: center;
            gap: 12px;
            flex: 1;
            justify-content: flex-end;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .main-nav a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 16px;
            color: var(--text);
            border-radius: 6px;
            position: relative;
            line-height: 1.4;
        }
        .main-nav a::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 0;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
            opacity: 0;
            transform: scaleX(0);
            transition: transform 0.25s ease, opacity 0.25s ease;
        }
        .main-nav a:hover {
            color: var(--secondary);
        }
        .main-nav a:hover::after,
        .main-nav a.active::after {
            opacity: 1;
            transform: scaleX(1);
        }
        .main-nav a.active {
            color: var(--secondary);
            font-weight: 600;
        }
        .header-cta {
            margin-left: 8px;
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            font-size: 22px;
            color: var(--secondary);
            padding: 8px;
            cursor: pointer;
            line-height: 1;
        }
        .nav-toggle:hover {
            color: var(--primary);
        }
        /* ========== Buttons & Badges ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 999px;
            border: 2px solid transparent;
            transition: var(--transition);
            line-height: 1.2;
            cursor: pointer;
            background: transparent;
        }
        .btn i {
            font-size: 14px;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--white) !important;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(242, 92, 42, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--secondary) !important;
            border-color: var(--secondary);
        }
        .btn-outline:hover {
            background: var(--secondary);
            color: var(--white) !important;
            transform: translateY(-2px);
        }
        .btn-white-outline {
            background: transparent;
            color: var(--white) !important;
            border-color: rgba(255, 255, 255, 0.7);
        }
        .btn-white-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--white);
        }
        .tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            line-height: 1.4;
        }
        .tag-orange {
            background: rgba(242, 92, 42, 0.12);
            color: var(--primary);
        }
        .tag-teal {
            background: rgba(15, 76, 92, 0.1);
            color: var(--secondary);
        }
        .tag-yellow {
            background: var(--accent);
            color: var(--secondary);
        }
        /* ========== Page Banner ========== */
        .page-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
        }
        .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 76, 92, 0.88) 0%, rgba(15, 76, 92, 0.62) 60%, rgba(15, 76, 92, 0.45) 100%);
        }
        .banner-content {
            position: relative;
            z-index: 2;
            padding: 72px 0;
            text-align: center;
        }
        .banner-badge {
            display: inline-block;
            background: var(--accent);
            color: var(--secondary);
            font-size: 14px;
            font-weight: 600;
            padding: 6px 20px;
            border-radius: 999px;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        .banner-content h1 {
            font-size: 44px;
            color: var(--white);
            line-height: 1.3;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }
        .banner-content p {
            color: rgba(255, 255, 255, 0.92);
            font-size: 18px;
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.7;
        }
        /* ========== Activity Section ========== */
        .activity-section {
            padding: 96px 0 80px;
            position: relative;
        }
        .activity-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(242, 92, 42, 0.04) 0%, transparent 70%);
            pointer-events: none;
        }
        .activity-card {
            position: relative;
            border-radius: var(--radius-lg);
            margin-bottom: 40px;
            box-shadow: var(--shadow);
            overflow: hidden;
            background: var(--white);
        }
        .activity-card.accent-bg {
            background: linear-gradient(135deg, rgba(242, 92, 42, 0.07) 0%, var(--white) 55%);
        }
        .activity-card.teal-bg {
            background: linear-gradient(135deg, rgba(15, 76, 92, 0.07) 0%, var(--white) 55%);
        }
        .activity-card.image-right .activity-flex {
            flex-direction: row-reverse;
        }
        .activity-flex {
            display: flex;
            align-items: center;
            gap: 48px;
            padding: 44px 48px;
        }
        .activity-media {
            flex: 0 0 38%;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 12px 32px rgba(15, 76, 92, 0.14);
            position: relative;
        }
        .activity-media img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .activity-card:hover .activity-media img {
            transform: scale(1.04);
        }
        .media-32 {
            flex-basis: 32%;
        }
        .media-36 {
            flex-basis: 36%;
        }
        .media-40 {
            flex-basis: 40%;
        }
        .media-44 {
            flex-basis: 44%;
        }
        .activity-body {
            flex: 1;
        }
        .activity-body .tag {
            margin-bottom: 12px;
        }
        .activity-body h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--secondary);
            margin: 10px 0 6px;
            line-height: 1.3;
        }
        .activity-meta {
            color: var(--text-light);
            font-size: 14px;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .activity-meta i {
            color: var(--primary);
        }
        .activity-body p {
            font-size: 15px;
            color: var(--text);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .activity-points {
            margin-bottom: 20px;
        }
        .activity-points li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 6px;
        }
        .activity-points li i {
            color: var(--primary);
            font-size: 13px;
        }
        .activity-body .btn {
            padding: 10px 26px;
            font-size: 15px;
        }
        /* ========== Steps Section ========== */
        .steps-section {
            padding: 84px 0;
            background: var(--secondary);
            position: relative;
            overflow: hidden;
        }
        .steps-section::before {
            content: "";
            position: absolute;
            right: -120px;
            top: -120px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            border: 2px solid rgba(245, 184, 46, 0.18);
        }
        .steps-section::after {
            content: "";
            position: absolute;
            left: -80px;
            bottom: -160px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.06);
        }
        .steps-section .container {
            position: relative;
            z-index: 2;
        }
        .section-title-center {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title-center h2 {
            font-size: 32px;
            color: var(--white);
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 1px;
        }
        .section-title-center p {
            color: rgba(255, 255, 255, 0.72);
            font-size: 16px;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .step-card {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 40px 30px;
            text-align: center;
            transition: var(--transition);
        }
        .step-card:hover {
            transform: translateY(-6px);
            background: rgba(255, 255, 255, 0.12);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.18);
        }
        .step-num {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--secondary);
            font-size: 22px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 8px 20px rgba(245, 184, 46, 0.3);
        }
        .step-icon {
            font-size: 24px;
            color: var(--accent);
            margin-bottom: 14px;
        }
        .step-card h3 {
            color: var(--white);
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .step-card p {
            color: rgba(255, 255, 255, 0.78);
            font-size: 15px;
            line-height: 1.7;
        }
        /* ========== CTA Section ========== */
        .cta-section {
            padding: 80px 0;
            position: relative;
        }
        .cta-box {
            position: relative;
            background: linear-gradient(135deg, var(--secondary) 0%, #0b3a47 100%);
            border-radius: var(--radius-lg);
            padding: 64px 56px;
            overflow: hidden;
            box-shadow: 0 20px 50px rgba(15, 76, 92, 0.25);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
        }
        .cta-box::before {
            content: "";
            position: absolute;
            right: -60px;
            top: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            border: 2px solid rgba(245, 184, 46, 0.25);
        }
        .cta-box::after {
            content: "";
            position: absolute;
            left: 30%;
            bottom: -100px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.05);
        }
        .cta-content {
            position: relative;
            z-index: 2;
            flex: 1;
        }
        .cta-content .tag {
            margin-bottom: 14px;
        }
        .cta-content h2 {
            color: var(--white);
            font-size: 30px;
            font-weight: 700;
            margin: 12px 0 10px;
            line-height: 1.3;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
        }
        .cta-action {
            position: relative;
            z-index: 2;
            flex-shrink: 0;
            text-align: center;
        }
        .cta-action .btn {
            min-width: 160px;
        }
        .cta-action small {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
            margin-top: 10px;
        }
        /* ========== FAQ ========== */
        .faq-section {
            padding: 84px 0;
            background: var(--white);
        }
        .faq-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .faq-header h2 {
            font-size: 32px;
            color: var(--secondary);
            font-weight: 700;
            margin-bottom: 8px;
        }
        .faq-header p {
            color: var(--text-light);
            font-size: 16px;
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow 0.3s ease;
        }
        .faq-item.active {
            box-shadow: var(--shadow);
            border-color: rgba(242, 92, 42, 0.3);
        }
        .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            transition: color 0.3s ease;
            user-select: none;
        }
        .faq-q:hover {
            color: var(--primary);
        }
        .faq-q .faq-text {
            flex: 1;
        }
        .faq-icon {
            position: relative;
            width: 22px;
            height: 22px;
            flex-shrink: 0;
            margin-left: 16px;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--primary);
            border-radius: 2px;
            transition: transform 0.3s ease;
        }
        .faq-icon::before {
            top: 10px;
            left: 0;
            width: 22px;
            height: 2px;
        }
        .faq-icon::after {
            top: 0;
            left: 10px;
            width: 2px;
            height: 22px;
        }
        .faq-item.active .faq-icon::after {
            transform: scaleY(0);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
        }
        .faq-item.active .faq-a {
            max-height: 400px;
            padding: 0 24px 22px;
        }
        .faq-a ol {
            padding-left: 20px;
            margin: 8px 0;
        }
        .faq-a ol li {
            margin-bottom: 4px;
        }
        /* ========== Footer ========== */
        .site-footer {
            background: #0d2f38;
            color: rgba(255, 255, 255, 0.72);
            font-size: 14px;
            padding: 64px 0 0;
            position: relative;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2.2fr 1fr 1.2fr 1.4fr;
            gap: 48px;
            padding-bottom: 44px;
        }
        .footer-brand .logo {
            color: var(--white);
            font-size: 22px;
            display: inline-block;
            margin-bottom: 14px;
        }
        .footer-brand p {
            line-height: 1.8;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            max-width: 300px;
        }
        .footer-col h4 {
            color: var(--white);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            position: relative;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            line-height: 1.7;
        }
        .footer-contact li i {
            color: var(--accent);
            width: 18px;
            font-size: 14px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            flex-wrap: wrap;
        }
        .back-top {
            position: fixed;
            right: 28px;
            bottom: 32px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            box-shadow: 0 8px 20px rgba(242, 92, 42, 0.35);
            z-index: 999;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            border: none;
            cursor: pointer;
        }
        .back-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-top:hover {
            background: var(--primary-hover);
            transform: translateY(-4px);
        }
        /* ========== Responsive ========== */
        @media screen and (max-width: 75em) {
            .header-cta {
                display: none;
            }
            .activity-flex {
                padding: 36px 32px;
                gap: 32px;
            }
        }
        @media screen and (max-width: 64em) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
            .activity-flex {
                flex-direction: column !important;
                padding: 32px 28px;
            }
            .activity-media,
            .media-32,
            .media-36,
            .media-40,
            .media-44 {
                flex-basis: auto !important;
                width: 100%;
            }
            .activity-media img {
                height: 220px;
                width: 100%;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-box {
                flex-direction: column;
                text-align: center;
                padding: 48px 32px;
            }
            .cta-action {
                width: 100%;
            }
        }
        @media screen and (max-width: 40em) {
            .site-header {
                height: auto;
                min-height: 64px;
            }
            .header-inner {
                height: 64px;
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: block;
            }
            .nav-container {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 20px;
                box-shadow: 0 12px 30px rgba(15, 76, 92, 0.12);
                border-top: 1px solid var(--border);
                border-radius: 0 0 var(--radius) var(--radius);
                gap: 4px;
                z-index: 999;
            }
            .nav-container.open {
                display: flex;
            }
            .main-nav {
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
            }
            .main-nav a {
                padding: 12px 10px;
                font-size: 16px;
                border-radius: 8px;
            }
            .main-nav a:hover {
                background: var(--bg);
            }
            .main-nav a::after {
                display: none;
            }
            .header-cta {
                display: inline-flex;
                margin: 10px 0 4px;
                width: 100%;
                justify-content: center;
            }
            .banner-content h1 {
                font-size: 30px;
            }
            .banner-content p {
                font-size: 15px;
            }
            .page-banner {
                min-height: 240px;
            }
            .banner-content {
                padding: 48px 0;
            }
            .activity-section {
                padding: 56px 0;
            }
            .activity-flex {
                padding: 24px 20px;
                gap: 20px;
            }
            .activity-media img {
                height: 180px;
            }
            .activity-body h3 {
                font-size: 22px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .section-title-center h2 {
                font-size: 24px;
            }
            .cta-box {
                padding: 36px 24px;
            }
            .cta-content h2 {
                font-size: 24px;
            }
            .faq-section {
                padding: 56px 0;
            }
            .faq-header h2 {
                font-size: 24px;
            }
            .faq-q {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-a {
                padding: 0 18px;
                font-size: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .back-top {
                right: 16px;
                bottom: 20px;
                width: 40px;
                height: 40px;
                font-size: 14px;
            }
        }