/* roulang page: index */
:root {
    --primary: #1B7F7A;
    --primary-light: #2FB8A7;
    --accent: #6FD3C6;
    --gold: #C49A5B;
    --bg: #F4F8F7;
    --white: #FFFFFF;
    --dark: #16302D;
    --gray: #5E7170;
    --lightgray: #A9B8B5;
    --border: #E4ECEA;
    --gradient: linear-gradient(135deg, #1B7F7A 0%, #2FB8A7 55%, #6FD3C6 100%);
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 6px;
    --shadow: 0 6px 24px rgba(22,48,45,0.08);
    --shadow-hover: 0 16px 40px rgba(22,48,45,0.14);
    --font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
    --trans: all .2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--dark); line-height: 1.75; font-size: 16px; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; transition: var(--trans); }
a:hover { color: var(--primary); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button, input { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.row { max-width: 1200px; }
.section { padding: 90px 0; }
.section-tag { display: inline-block; background: rgba(196,154,91,0.15); color: var(--gold); font-size: 13px; font-weight: 600; padding: 4px 14px; border-radius: 999px; margin-bottom: 14px; letter-spacing: 1px; }
.section-title { font-size: clamp(26px, 3vw, 40px); font-weight: 600; line-height: 1.3; margin-bottom: 14px; }
.section-sub { color: var(--gray); font-size: 16px; max-width: 640px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 24px; flex-wrap: wrap; gap: 12px; }
.more-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.more-link i { transition: transform .2s ease; }
.more-link:hover i { transform: translateX(4px); }

.site-header {
    position: fixed; top: 0; left: 0; right: 0; height: 64px;
    background: rgba(255,255,255,0.85); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
    z-index: 1000; border-bottom: 1px solid rgba(228,236,234,0.6);
}
.header-inner {
    max-width: 1440px; margin: 0 auto; height: 64px; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.header-left { display: flex; align-items: center; gap: 36px; flex: 1; min-width: 0; }
.brand-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon { width: 36px; height: 36px; border-radius: 50%; background: var(--gradient); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 16px; flex-shrink: 0; box-shadow: 0 4px 12px rgba(27,127,122,0.3); }
.brand-text { font-size: 20px; font-weight: 700; color: var(--dark); letter-spacing: .5px; white-space: nowrap; }
.main-nav { display: flex; align-items: center; gap: 26px; }
.nav-link { font-size: 15px; font-weight: 500; color: var(--gray); padding: 6px 2px; position: relative; white-space: nowrap; }
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after { content: ''; position: absolute; bottom: -2px; left: 50%; transform: translateX(-50%); width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.header-right { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.search-btn { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--gray); background: rgba(27,127,122,0.08); border: none; cursor: pointer; transition: var(--trans); }
.search-btn:hover { color: var(--primary); background: rgba(27,127,122,0.15); }
.btn-main { height: 40px; padding: 0 24px; border-radius: 999px; background: var(--gradient); color: #fff; font-weight: 600; font-size: 15px; display: inline-flex; align-items: center; justify-content: center; border: none; cursor: pointer; transition: var(--trans); box-shadow: 0 4px 16px rgba(27,127,122,0.25); }
.btn-main:hover { filter: brightness(1.05); transform: translateY(-2px); color: #fff; box-shadow: 0 8px 24px rgba(27,127,122,0.35); }
.btn-main:active { transform: translateY(0); }
.btn-main:focus-visible { outline: none; box-shadow: 0 0 0 4px rgba(27,127,122,0.25); }
.btn-outline { height: 40px; padding: 0 24px; border-radius: 999px; border: 1.5px solid var(--primary); color: var(--primary); background: transparent; font-weight: 600; font-size: 15px; display: inline-flex; align-items: center; justify-content: center; transition: var(--trans); cursor: pointer; }
.btn-outline:hover { background: rgba(27,127,122,0.1); color: var(--primary); }
.btn-outline:focus-visible { outline: none; box-shadow: 0 0 0 4px rgba(27,127,122,0.25); }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.hamburger span { width: 22px; height: 2px; background: var(--dark); border-radius: 2px; transition: var(--trans); }

.hero { min-height: 100vh; display: flex; align-items: stretch; padding-top: 64px; background: var(--bg); position: relative; overflow: hidden; }
.hero-bg-layer { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.webp'); background-size: cover; background-position: center; opacity: .18; pointer-events: none; }
.hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(244,248,247,0.92) 30%, rgba(244,248,247,0.4) 100%); pointer-events: none; }
.hero-inner { width: 100%; max-width: 1440px; margin: 0 auto; display: flex; align-items: stretch; position: relative; z-index: 1; }
.hero-left { flex: 0 0 55%; max-width: 55%; padding: 80px 48px 60px 56px; display: flex; flex-direction: column; justify-content: center; }
.hero-right { flex: 0 0 45%; max-width: 45%; padding: 50px 48px 50px 16px; display: flex; align-items: center; justify-content: center; }
.hero-caption { display: inline-flex; align-items: center; gap: 8px; background: rgba(196,154,91,0.15); color: var(--gold); font-size: 13px; font-weight: 600; padding: 5px 16px; border-radius: 999px; margin-bottom: 20px; letter-spacing: 1px; }
.hero h1 { font-size: clamp(32px, 4.5vw, 52px); font-weight: 700; line-height: 1.2; color: var(--dark); margin-bottom: 18px; letter-spacing: .5px; }
.hero-sub { font-size: 17px; color: var(--gray); line-height: 1.75; max-width: 480px; margin-bottom: 32px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-badges { display: flex; gap: 20px; margin-top: 40px; flex-wrap: wrap; }
.badge-circle { width: 84px; height: 84px; border-radius: 50%; background: var(--white); border: 2px solid var(--accent); display: flex; flex-direction: column; align-items: center; justify-content: center; box-shadow: var(--shadow); transition: var(--trans); }
.badge-circle:hover { transform: scale(1.03); box-shadow: var(--shadow-hover); }
.badge-num { font-size: 24px; font-weight: 700; color: var(--primary); line-height: 1.2; }
.badge-unit { font-size: 14px; font-weight: 700; color: var(--primary); }
.badge-label { font-size: 11px; color: var(--gray); font-weight: 500; margin-top: 4px; letter-spacing: .5px; }
.hero-card { width: 100%; max-width: 540px; height: 460px; border-radius: 24px; overflow: hidden; position: relative; box-shadow: var(--shadow-hover); }
.hero-card img { width: 100%; height: 100%; object-fit: cover; }
.hero-card-mask { position: absolute; inset: 0; background: linear-gradient(to top, rgba(22,48,45,0.55), transparent 60%); }
.hero-card-tag { position: absolute; top: 20px; left: 20px; background: rgba(255,255,255,0.92); color: var(--dark); font-size: 13px; font-weight: 600; padding: 6px 16px; border-radius: 999px; backdrop-filter: blur(4px); box-shadow: 0 4px 12px rgba(22,48,45,0.1); }
.hero-card-note { position: absolute; bottom: 24px; left: 24px; right: 24px; color: #fff; font-size: 15px; font-weight: 500; line-height: 1.6; }
.hero-card-note::before { content: ''; display: inline-block; width: 3px; height: 16px; background: var(--accent); border-radius: 2px; margin-right: 10px; vertical-align: -2px; }

.story-grid { display: flex; gap: 64px; align-items: center; }
.story-image { flex: 0 0 40%; max-width: 40%; position: relative; }
.story-image::before { content: ''; position: absolute; top: -10px; left: 10px; width: 100%; height: 100%; border-radius: 20px; background: rgba(27,127,122,0.3); z-index: 0; }
.story-image img { position: relative; z-index: 1; border-radius: 20px; box-shadow: var(--shadow); width: 100%; height: 320px; object-fit: cover; }
.story-content { flex: 1; }
.story-content p { font-size: 15px; color: var(--gray); line-height: 1.8; margin-bottom: 16px; }
.story-points { margin-top: 24px; }
.story-points li { display: flex; align-items: center; gap: 12px; padding: 10px 0; font-size: 15px; color: var(--dark); }
.story-points li i { width: 34px; height: 34px; border-radius: 50%; background: rgba(27,127,122,0.1); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 14px; flex-shrink: 0; }

.featured { background: var(--white); }
.featured-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 40px; }
.feature-card { border-radius: var(--radius-lg); overflow: hidden; background: var(--white); border: 1px solid var(--border); box-shadow: var(--shadow); transition: var(--trans); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(27,127,122,0.3); }
.feature-card .card-img { position: relative; height: 190px; overflow: hidden; }
.feature-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.feature-card:hover .card-img img { transform: scale(1.05); }
.card-tag { position: absolute; top: 14px; left: 14px; background: var(--gold); color: #fff; font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 999px; letter-spacing: .5px; }
.card-body { padding: 24px; }
.card-body h3 { font-size: 19px; font-weight: 600; margin-bottom: 8px; color: var(--dark); line-height: 1.4; }
.card-body p { font-size: 14px; color: var(--gray); line-height: 1.7; margin-bottom: 16px; }
.card-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.card-link i { transition: transform .2s ease; }
.card-link:hover i { transform: translateX(4px); }

.trust { background: linear-gradient(180deg, var(--bg), var(--white)); }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 36px; text-align: center; }
.trust-badge { display: flex; flex-direction: column; align-items: center; gap: 14px; padding: 20px 10px; }
.trust-badge .trust-num { width: 96px; height: 96px; border-radius: 50%; border: 2px solid var(--accent); background: var(--white); display: flex; align-items: center; justify-content: center; font-size: 34px; font-weight: 700; color: var(--primary); box-shadow: var(--shadow); font-family: var(--font); transition: var(--trans); }
.trust-badge:hover .trust-num { transform: scale(1.03); box-shadow: var(--shadow-hover); }
.trust-badge .trust-unit { font-size: 16px; font-weight: 600; }
.trust-badge p { font-size: 14px; color: var(--gray); }

.news { background: var(--white); }
.news-list { margin-top: 36px; border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; background: var(--white); }
.news-item { display: grid; grid-template-columns: 110px 1fr 1.6fr 120px; align-items: center; gap: 18px; padding: 20px 26px; border-bottom: 1px solid var(--border); transition: var(--trans); }
.news-item:last-child { border-bottom: none; }
.news-item:hover { background: rgba(244,248,247,0.8); }
.news-cat { font-size: 12px; background: var(--gold); color: #fff; padding: 4px 12px; border-radius: 6px; font-weight: 600; white-space: nowrap; text-align: center; letter-spacing: .5px; justify-self: start; }
.news-title { font-size: 16px; font-weight: 600; color: var(--dark); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.news-title:hover { color: var(--primary); }
.news-excerpt { font-size: 14px; color: var(--gray); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.news-time { font-size: 13px; color: var(--gray); text-align: right; white-space: nowrap; }
.news-empty { padding: 70px 20px; text-align: center; color: var(--gray); }
.news-empty i { font-size: 40px; color: #D5E2DF; margin-bottom: 14px; display: block; }
.news-empty p { font-size: 15px; }

.faq { background: var(--bg); }
.faq-list { max-width: 860px; margin: 0 auto; margin-top: 40px; }
.faq-item { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-md); margin-bottom: 14px; overflow: hidden; transition: var(--trans); }
.faq-item.active { background: #EEF6F4; border-color: rgba(27,127,122,0.25); }
.faq-question { width: 100%; display: flex; align-items: center; gap: 14px; padding: 20px 24px; background: none; border: none; cursor: pointer; font-size: 16px; font-weight: 600; color: var(--dark); text-align: left; font-family: var(--font); transition: var(--trans); }
.faq-question:hover { color: var(--primary); }
.faq-question .q-icon { width: 26px; height: 26px; border-radius: 50%; border: 2px solid var(--primary); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; flex-shrink: 0; transition: var(--trans); }
.faq-item.active .q-icon { background: var(--primary); color: #fff; }
.faq-question .q-arrow { margin-left: auto; font-size: 14px; color: var(--gray); transition: transform .2s ease; flex-shrink: 0; }
.faq-item.active .q-arrow { transform: rotate(180deg); }
.faq-answer { padding: 0 24px 20px 64px; font-size: 15px; line-height: 1.75; color: var(--gray); display: none; }
.faq-item.active .faq-answer { display: block; }

.cta-section { padding: 60px 0 90px; }
.cta-box { background: var(--gradient); border-radius: 24px; padding: 56px 64px; display: flex; align-items: center; justify-content: space-between; gap: 48px; color: #fff; position: relative; overflow: hidden; box-shadow: 0 20px 48px rgba(27,127,122,0.28); }
.cta-box::before { content: ''; position: absolute; top: -80px; right: -80px; width: 240px; height: 240px; border-radius: 50%; background: rgba(255,255,255,0.12); pointer-events: none; }
.cta-box::after { content: ''; position: absolute; bottom: -60px; left: 40%; width: 160px; height: 160px; border-radius: 50%; background: rgba(255,255,255,0.08); pointer-events: none; }
.cta-left { position: relative; z-index: 1; }
.cta-left h2 { font-size: clamp(24px, 2.6vw, 34px); font-weight: 700; margin-bottom: 10px; line-height: 1.3; }
.cta-left p { color: rgba(255,255,255,0.85); font-size: 15px; max-width: 480px; }
.cta-right { flex-shrink: 0; min-width: 380px; position: relative; z-index: 1; }
.cta-form { display: flex; gap: 12px; }
.cta-form input { flex: 1; height: 48px; border-radius: 12px; border: none; padding: 0 18px; font-size: 14px; background: rgba(255,255,255,0.96); color: var(--dark); box-shadow: 0 4px 12px rgba(22,48,45,0.08); }
.cta-form input::placeholder { color: #9AA8A6; }
.cta-form input:focus { outline: none; box-shadow: 0 0 0 4px rgba(255,255,255,0.35); }
.btn-cta-light { height: 48px; padding: 0 32px; border-radius: 999px; background: #fff; color: var(--primary); font-weight: 600; border: none; cursor: pointer; font-size: 15px; transition: var(--trans); box-shadow: 0 6px 16px rgba(22,48,45,0.18); white-space: nowrap; }
.btn-cta-light:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(22,48,45,0.25); color: var(--primary); }
.btn-cta-light:active { transform: translateY(0); }
.btn-cta-light:focus-visible { outline: none; box-shadow: 0 0 0 4px rgba(255,255,255,0.4); }

.site-footer { background: var(--dark); color: rgba(255,255,255,0.7); padding: 70px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.3fr; gap: 48px; padding-bottom: 50px; }
.footer-brand .brand-logo { margin-bottom: 18px; }
.footer-brand .brand-text { color: #fff; }
.footer-brand p { font-size: 14px; color: var(--lightgray); line-height: 1.7; max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 20px; }
.footer-col a { display: block; color: var(--lightgray); font-size: 14px; padding: 5px 0; transition: var(--trans); }
.footer-col a:hover { color: var(--accent); }
.footer-contact p { font-size: 14px; color: var(--lightgray); display: flex; align-items: center; gap: 10px; padding: 4px 0; line-height: 1.6; }
.footer-contact p i { width: 20px; text-align: center; color: var(--accent); }
.social-icons { display: flex; gap: 10px; margin-top: 18px; }
.social-icons a { width: 36px; height: 36px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.2); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 14px; transition: var(--trans); }
.social-icons a:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 22px 0; text-align: center; font-size: 13px; color: rgba(255,255,255,0.6); }

@media (max-width: 1024px) {
    .hero { flex-direction: column; }
    .hero-inner { flex-direction: column; }
    .hero-left { flex: none; max-width: 100%; padding: 60px 24px 16px; }
    .hero-right { flex: none; max-width: 100%; padding: 16px 24px 48px; }
    .hero-card { height: 340px; }
    .main-nav { gap: 18px; }
    .featured-grid { grid-template-columns: repeat(2, 1fr); }
    .trust-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .story-grid { flex-direction: column; gap: 40px; }
    .story-image { flex: none; max-width: 100%; }
    .cta-box { flex-direction: column; padding: 44px 36px; }
    .cta-right { min-width: 100%; }
}
@media (max-width: 767px) {
    .hamburger { display: flex; }
    .main-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--white); padding: 12px 24px 20px; border-bottom: 1px solid var(--border); flex-direction: column; align-items: flex-start; gap: 2px; box-shadow: 0 20px 40px rgba(22,48,45,0.08); }
    .main-nav.open { display: flex; }
    .nav-link { padding: 14px 0; font-size: 16px; width: 100%; border-bottom: 1px solid var(--border); }
    .nav-link:last-child { border-bottom: none; }
    .header-right .search-btn { display: none; }
    .header-inner { padding: 0 16px; }
    .hero-left { padding-top: 48px; }
    .hero-right { padding-bottom: 36px; }
    .hero-card { height: 240px; }
    .hero-btns { flex-direction: column; }
    .hero-btns .btn-main, .hero-btns .btn-outline { width: 100%; }
    .section { padding: 48px 0; }
    .featured-grid { grid-template-columns: 1fr; gap: 20px; }
    .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .news-item { grid-template-columns: 1fr; grid-template-areas: 'cat time' 'title title' 'excerpt excerpt'; gap: 6px; padding: 16px 20px; }
    .news-cat { grid-area: cat; }
    .news-time { grid-area: time; text-align: right; }
    .news-title { grid-area: title; white-space: normal; line-height: 1.4; }
    .news-excerpt { grid-area: excerpt; white-space: normal; }
    .cta-section { padding: 40px 0 48px; }
    .cta-box { flex-direction: column; padding: 36px 24px; gap: 24px; }
    .cta-form { flex-direction: column; }
    .cta-form input { width: 100%; }
    .btn-cta-light { width: 100%; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; padding-bottom: 32px; }
    .site-footer { padding-top: 48px; }
    .badge-circle { width: 72px; height: 72px; }
    .badge-num { font-size: 20px; }
}
@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .featured-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 30px; }
    .hero-sub { font-size: 15px; }
    .cta-box { padding: 32px 20px; }
    .trust-grid { gap: 12px; }
}

/* roulang page: category1 */
:root {
            --primary: #1B7F7A;
            --primary-light: #2FB8A7;
            --primary-soft: #6FD3C6;
            --accent: #C49A5B;
            --bg: #F4F8F7;
            --card-bg: #FFFFFF;
            --text-dark: #16302D;
            --text-gray: #5E7170;
            --text-light: #9AA8A6;
            --border: #E4ECEA;
            --shadow: 0 6px 24px rgba(22, 48, 45, 0.08);
            --shadow-hover: 0 16px 40px rgba(22, 48, 45, 0.14);
            --radius: 20px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --transition: all 0.2s ease;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-dark);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: rgba(255, 255, 255, 0.85);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
            z-index: 1000;
            border-bottom: 1px solid var(--border);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1380px;
            margin: 0 auto;
            padding: 0 24px;
            gap: 16px;
        }
        .nav-left {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1 1 auto;
            min-width: 0;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-soft) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            box-shadow: 0 4px 12px rgba(27, 127, 122, 0.3);
        }
        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .main-nav::-webkit-scrollbar {
            display: none;
        }
        .main-nav .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-dark);
            border-radius: 999px;
            white-space: nowrap;
            position: relative;
        }
        .main-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(27, 127, 122, 0.06);
        }
        .main-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .main-nav .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-toggle {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-gray);
            font-size: 16px;
            transition: var(--transition);
        }
        .search-toggle:hover {
            color: var(--primary);
            background: rgba(27, 127, 122, 0.08);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 600;
            border-radius: 999px;
            padding: 0 24px;
            height: 40px;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-soft) 100%);
            color: #fff;
            box-shadow: 0 4px 16px rgba(27, 127, 122, 0.25);
        }
        .btn-primary:hover {
            filter: brightness(1.05);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(27, 127, 122, 0.3);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 8px rgba(27, 127, 122, 0.2);
        }
        .btn-primary:focus-visible {
            box-shadow: 0 0 0 4px rgba(27, 127, 122, 0.25);
            outline: none;
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: rgba(27, 127, 122, 0.08);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-outline:focus-visible {
            box-shadow: 0 0 0 4px rgba(27, 127, 122, 0.2);
            outline: none;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            background: rgba(27, 127, 122, 0.08);
        }
        .hamburger span {
            width: 20px;
            height: 2px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        /* ===== 移动端抽屉 ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            padding: 24px;
            box-shadow: 0 8px 40px rgba(22, 48, 45, 0.12);
            z-index: 999;
            border-bottom: 1px solid var(--border);
            flex-direction: column;
            gap: 8px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-dark);
            border-radius: 12px;
            transition: var(--transition);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: rgba(27, 127, 122, 0.08);
            color: var(--primary);
        }
        /* ===== Hero小条 ===== */
        .page-hero {
            padding: 120px 0 56px;
            background: linear-gradient(135deg, rgba(27, 127, 122, 0.10) 0%, rgba(47, 184, 167, 0.08) 55%, rgba(196, 154, 91, 0.10) 100%);
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(27, 127, 122, 0.12) 0%, transparent 70%);
            top: -80px;
            right: -60px;
        }
        .hero-inner {
            position: relative;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }
        .hero-inner h1 {
            font-size: clamp(32px, 4vw, 44px);
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-dark);
            margin: 0;
        }
        .hero-inner p {
            font-size: 16px;
            color: var(--text-gray);
            max-width: 460px;
            line-height: 1.7;
            margin: 0;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.7);
            border: 1px solid rgba(27, 127, 122, 0.15);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            margin-bottom: 16px;
        }
        /* ===== 主体长内容卡 ===== */
        .content-section {
            padding: 64px 0 32px;
        }
        .content-card-lg {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .content-card-lg:hover {
            box-shadow: var(--shadow-hover);
        }
        .content-card-lg .card-media {
            flex: 0 0 42%;
            min-height: 340px;
            position: relative;
            overflow: hidden;
        }
        .content-card-lg .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            top: 0;
            left: 0;
            transition: transform 0.5s ease;
        }
        .content-card-lg:hover .card-media img {
            transform: scale(1.04);
        }
        .content-card-lg .card-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(22, 48, 45, 0.15) 0%, transparent 40%);
        }
        .media-badge {
            position: absolute;
            top: 20px;
            left: 20px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            backdrop-filter: blur(4px);
        }
        .content-card-lg .card-body {
            flex: 1;
            padding: 44px 48px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .card-body .section-label {
            font-size: 13px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .card-body .section-label::before {
            content: "";
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .card-body h2 {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 600;
            line-height: 1.3;
            color: var(--text-dark);
            margin-bottom: 16px;
        }
        .card-body p {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-gray);
            margin-bottom: 16px;
        }
        .feature-list {
            margin-top: 20px;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            font-size: 15px;
            color: var(--text-dark);
            line-height: 1.6;
        }
        .feature-list li:last-child {
            border-bottom: none;
        }
        .feature-list .icon-wrap {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(27, 127, 122, 0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 15px;
            flex-shrink: 0;
        }
        .feature-list strong {
            display: block;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 2px;
        }
        .feature-list span {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.6;
        }
        /* ===== 服务亮点 ===== */
        .highlights-section {
            padding: 48px 0 64px;
        }
        .highlights-section .section-title {
            text-align: center;
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 8px;
        }
        .highlights-section .section-sub {
            text-align: center;
            color: var(--text-gray);
            font-size: 16px;
            margin-bottom: 40px;
        }
        .highlight-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .highlight-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--primary-soft));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.35s ease;
        }
        .highlight-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .highlight-card:hover::before {
            transform: scaleX(1);
        }
        .highlight-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(27, 127, 122, 0.12), rgba(111, 211, 198, 0.18));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 18px;
        }
        .highlight-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .highlight-card p {
            font-size: 15px;
            color: var(--text-gray);
            line-height: 1.7;
            margin-bottom: 0;
        }
        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 56px 0 64px;
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .related-section .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 32px;
            text-align: center;
        }
        .related-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(27, 127, 122, 0.3);
        }
        .related-card .card-media {
            height: 160px;
            overflow: hidden;
            position: relative;
        }
        .related-card .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .card-media img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .related-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.4;
        }
        .related-card p {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.6;
            margin-bottom: 12px;
            flex: 1;
        }
        .related-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-link i {
            font-size: 12px;
            transition: transform 0.2s ease;
        }
        .related-link:hover {
            color: var(--primary-light);
        }
        .related-link:hover i {
            transform: translateX(4px);
        }
        /* ===== CTA区 ===== */
        .cta-section {
            padding: 72px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 55%, var(--primary-soft) 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            top: -200px;
            right: -100px;
        }
        .cta-inner {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
        }
        .cta-inner h2 {
            color: #fff;
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 10px;
        }
        .cta-inner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            line-height: 1.7;
            max-width: 480px;
            margin-bottom: 0;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            align-items: center;
            flex-wrap: wrap;
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
            color: var(--primary);
        }
        .btn-ghost-white {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.7);
            color: #fff;
        }
        .btn-ghost-white:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            transform: translateY(-2px);
        }
        /* ===== FAQ ===== */
        .faq-section {
            padding: 64px 0 72px;
            background: var(--bg);
        }
        .faq-section .section-title {
            text-align: center;
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 36px;
        }
        .accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .accordion-item.is-active {
            background: #EEF6F4;
            border-color: rgba(27, 127, 122, 0.25);
            box-shadow: 0 4px 16px rgba(27, 127, 122, 0.06);
        }
        .accordion-title {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            transition: var(--transition);
        }
        .accordion-title:hover {
            color: var(--primary);
        }
        .accordion-title .q-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border: 1.5px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            flex-shrink: 0;
            font-weight: 700;
        }
        .accordion-title::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 13px;
            color: var(--text-gray);
            margin-left: auto;
            transition: transform 0.25s ease;
        }
        .accordion-item.is-active .accordion-title::after {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .accordion-content {
            display: none;
            padding: 0 24px 18px 70px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-gray);
        }
        .accordion-item.is-active .accordion-content {
            display: block;
        }
        /* ===== 页脚 ===== */
        .site-footer {
            background: #16302D;
            color: #A9B8B5;
            padding: 64px 0 0;
            font-size: 15px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }
        .footer-brand .brand-text {
            color: #fff;
            font-size: 20px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #A9B8B5;
            margin-bottom: 20px;
            max-width: 320px;
        }
        .social-icons {
            display: flex;
            gap: 12px;
        }
        .social-icons a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            color: #A9B8B5;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .footer-col a {
            display: block;
            color: #A9B8B5;
            font-size: 14px;
            padding: 6px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: #6FD3C6;
            padding-left: 4px;
        }
        .footer-col p {
            font-size: 14px;
            line-height: 1.8;
            color: #A9B8B5;
            margin-bottom: 8px;
        }
        .footer-col p i {
            margin-right: 8px;
            color: #6FD3C6;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom p {
            margin: 0;
        }
        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .nav-container {
                padding: 0 16px;
            }
            .content-card-lg .card-media {
                flex: 0 0 40%;
                min-height: 280px;
            }
            .content-card-lg .card-body {
                padding: 32px;
            }
        }
        @media (max-width: 767px) {
            .nav-right .search-toggle {
                display: none;
            }
            .nav-right .btn {
                display: none;
            }
            .container {
                padding: 0 16px;
            }
            .page-hero {
                padding: 96px 0 40px;
            }
            .hero-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .content-section {
                padding: 40px 0 24px;
            }
            .content-card-lg {
                flex-direction: column;
            }
            .content-card-lg .card-media {
                flex: none;
                height: 220px;
                min-height: 0;
            }
            .content-card-lg .card-body {
                padding: 24px;
            }
            .highlights-section {
                padding: 32px 0 40px;
            }
            .highlight-card {
                margin-bottom: 16px;
            }
            .related-section {
                padding: 40px 0;
            }
            .related-card {
                margin-bottom: 16px;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .faq-section {
                padding: 40px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }
            .accordion-content {
                padding-left: 56px;
            }
        }
        @media (max-width: 520px) {
            .brand-text {
                font-size: 17px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 13px;
            }
            .hero-inner h1 {
                font-size: 28px;
            }
            .content-card-lg .card-body h2 {
                font-size: 24px;
            }
            .feature-list .icon-wrap {
                width: 34px;
                height: 34px;
                font-size: 13px;
            }
        }

/* roulang page: article */
:root {
    --primary: #1B7F7A;
    --primary-dark: #146A66;
    --primary-light: #2FB8A7;
    --accent-gold: #C49A5B;
    --gradient-main: linear-gradient(135deg, #1B7F7A 0%, #2FB8A7 55%, #6FD3C6 100%);
    --bg-cloud: #F4F8F7;
    --bg-white: #FFFFFF;
    --text-dark: #16302D;
    --text-muted: #5E7170;
    --border-color: #E4ECEA;
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-card: 0 6px 24px rgba(22,48,45,0.08);
    --shadow-hover: 0 16px 40px rgba(22,48,45,0.14);
    --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --transition: all 0.2s ease;
    --header-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

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

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

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

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
    text-underline-offset: 2px;
}

button, input, select, textarea {
    font-family: var(--font-main);
    font-size: 14px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Header & Navigation ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(228, 236, 234, 0.6);
}

.header-inner {
    max-width: 1200px;
    height: 100%;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 32px;
    min-width: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.brand-logo:hover {
    text-decoration: none;
}

.brand-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-main);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 14px;
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(27, 127, 122, 0.25);
}

.brand-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}

.main-nav .nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    text-decoration: none;
    position: relative;
    padding: 8px 0;
    white-space: nowrap;
}

.main-nav .nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform 0.2s ease;
}

.main-nav .nav-link:hover {
    color: var(--primary);
    text-decoration: none;
}

.main-nav .nav-link:hover::after,
.main-nav .nav-link.active::after {
    transform: scaleX(1);
}

.main-nav .nav-link.active {
    color: var(--primary);
}

.search-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-cloud);
    border: 1px solid var(--border-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dark);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    text-decoration: none;
    transform: scale(1.04);
}

.btn-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--gradient-main);
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(27, 127, 122, 0.25);
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(27, 127, 122, 0.35);
    filter: brightness(1.05);
    color: #fff;
    text-decoration: none;
}

.btn-cta:active {
    transform: translateY(0);
    box-shadow: 0 4px 10px rgba(27, 127, 122, 0.2);
}

.btn-cta:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(27, 127, 122, 0.25);
}

.hamburger {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 0;
}

.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    z-index: 999;
    padding: 16px 20px 24px;
    box-shadow: 0 16px 30px rgba(22, 48, 45, 0.12);
    border-bottom: 1px solid var(--border-color);
}

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

.mobile-menu a {
    display: block;
    padding: 13px 4px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dark);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu a:last-child {
    border-bottom: none;
}

.mobile-menu a:hover {
    color: var(--primary);
    text-decoration: none;
}

/* ===== Breadcrumb ===== */
.breadcrumb-bar {
    background: #fff;
    border-bottom: 1px solid var(--border-color);
    padding: 14px 0;
}

.breadcrumb-bar .container {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--text-muted);
}

.breadcrumb-bar a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb-bar a:hover {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb-bar .sep {
    margin: 0 10px;
    color: var(--border-color);
}

.breadcrumb-bar .current {
    color: var(--text-dark);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 420px;
}

/* ===== Article Hero ===== */
.article-hero {
    position: relative;
    padding: 72px 0 80px;
    background: linear-gradient(135deg, #16302D 0%, #1B7F7A 70%, #2FB8A7 100%);
    color: #fff;
    overflow: hidden;
}

.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    opacity: 0.16;
}

.article-hero::after {
    content: '';
    position: absolute;
    top: -60px;
    right: -40px;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.article-hero .container {
    position: relative;
    z-index: 2;
    max-width: 960px;
}

.article-cat-label {
    display: inline-flex;
    align-items: center;
    background: var(--accent-gold);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 999px;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.article-hero h1 {
    font-size: clamp(30px, 4vw, 44px);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 20px;
    color: #fff;
    letter-spacing: 0.5px;
    max-width: 820px;
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.75);
}

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

.article-meta i {
    font-size: 13px;
    opacity: 0.8;
}

/* ===== Article Main ===== */
.article-main {
    padding: 48px 0 80px;
    background: var(--bg-cloud);
}

.article-wrap {
    max-width: 860px;
    margin: 0 auto;
}

.article-cover {
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 40px;
    box-shadow: var(--shadow-card);
    aspect-ratio: 16/9;
    background: linear-gradient(135deg, #16302D 0%, #1B7F7A 100%);
}

.article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-body {
    max-width: 760px;
    margin: 0 auto;
    font-size: 17px;
    line-height: 1.75;
    color: var(--text-dark);
}

.article-body p {
    margin-bottom: 1.6em;
}

.article-body h2 {
    font-size: 28px;
    font-weight: 600;
    margin: 40px 0 16px;
    color: var(--text-dark);
    line-height: 1.3;
}

.article-body h3 {
    font-size: 22px;
    font-weight: 600;
    margin: 32px 0 12px;
    color: var(--text-dark);
    line-height: 1.35;
}

.article-body blockquote {
    border-left: 4px solid var(--primary);
    background: #EEF6F4;
    padding: 16px 24px;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--text-muted);
    margin: 24px 0;
    font-size: 15px;
}

.article-body ul,
.article-body ol {
    margin: 0 0 1.6em 0;
    padding: 0;
}

.article-body ul {
    list-style: none;
}

.article-body ul li {
    position: relative;
    padding-left: 22px;
    margin-bottom: 10px;
}

.article-body ul li::before {
    content: '';
    position: absolute;
    left: 2px;
    top: 0.72em;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-light);
}

.article-body ol {
    list-style: decimal;
    padding-left: 22px;
}

.article-body ol li {
    margin-bottom: 10px;
}

.article-body a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

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

.article-body img {
    max-width: 100%;
    border-radius: var(--radius-lg);
    margin: 24px 0;
}

.article-body figure {
    margin: 24px 0;
}

.article-body figure img {
    margin: 0;
}

.article-body figcaption {
    font-size: 14px;
    color: var(--text-muted);
    text-align: center;
    margin-top: 12px;
}

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

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

.article-body table th {
    background: var(--bg-cloud);
    font-weight: 600;
    color: var(--text-dark);
}

.article-body table tr:nth-child(even) td {
    background: #FAFCFB;
}

.article-body code {
    background: var(--bg-cloud);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 14px;
    font-family: "SFMono-Regular", Menlo, Consolas, monospace;
}

.article-body pre {
    background: #16302D;
    color: #E4ECEA;
    border-radius: var(--radius-md);
    padding: 20px 24px;
    overflow-x: auto;
    margin: 24px 0;
    font-family: "SFMono-Regular", Menlo, Consolas, monospace;
    font-size: 14px;
    line-height: 1.6;
}

.article-body pre code {
    background: transparent;
    border: none;
    padding: 0;
    color: inherit;
    font-size: 14px;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 70px 30px;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
}

.empty-state i {
    font-size: 44px;
    color: var(--border-color);
    margin-bottom: 20px;
}

.empty-state h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 10px;
}

.empty-state p {
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* ===== Article Tags ===== */
.article-tags {
    max-width: 760px;
    margin: 40px auto 0;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 28px;
    border-top: 1px solid var(--border-color);
}

.article-tags .tag-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    margin-right: 4px;
}

.tag-pill {
    display: inline-flex;
    align-items: center;
    padding: 5px 14px;
    border-radius: 999px;
    background: var(--bg-cloud);
    border: 1px solid var(--border-color);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition);
}

.tag-pill:hover {
    background: #EEF6F4;
    border-color: rgba(27, 127, 122, 0.3);
    color: var(--primary);
    text-decoration: none;
}

/* ===== Article Footer Nav ===== */
.article-footer-nav {
    max-width: 760px;
    margin: 40px auto 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
}

.back-link:hover {
    color: var(--primary);
    text-decoration: none;
    transform: translateX(-3px);
}

.to-top {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
}

.to-top:hover {
    color: var(--primary);
    text-decoration: none;
    transform: translateY(-3px);
}

/* ===== Related Section ===== */
.related-section {
    padding: 72px 0;
    background: #fff;
}

.related-section .section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 36px;
}

.related-section .section-header h2 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.related-section .section-header .more-link {
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

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

.related-card {
    background: var(--bg-cloud);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    text-decoration: none;
    display: block;
    height: 100%;
    margin-bottom: 20px;
}

.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    text-decoration: none;
}

.related-card-img {
    aspect-ratio: 16/9;
    overflow: hidden;
    background: linear-gradient(135deg, #16302D 0%, #1B7F7A 100%);
}

.related-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.related-card-body {
    padding: 20px 22px 24px;
}

.related-card-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.4;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-card-body time {
    font-size: 13px;
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* ===== CTA Section ===== */
.cta-section {
    padding: 72px 0;
    background: var(--gradient-main);
}

.cta-inner {
    background: #fff;
    border-radius: 24px;
    padding: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    box-shadow: 0 16px 40px rgba(22, 48, 45, 0.22);
}

.cta-left h2 {
    font-size: clamp(22px, 2.6vw, 30px);
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
    line-height: 1.3;
}

.cta-left p {
    color: var(--text-muted);
    font-size: 15px;
    margin: 0;
}

.cta-form {
    display: flex;
    gap: 10px;
    flex-shrink: 0;
    width: 100%;
    max-width: 460px;
}

.cta-form input[type="email"] {
    flex: 1;
    height: 48px;
    padding: 0 18px;
    border: 1px solid #DDE5E3;
    border-radius: 12px;
    font-size: 14px;
    background: #fff;
    color: var(--text-dark);
    transition: var(--transition);
    min-width: 0;
}

.cta-form input[type="email"]::placeholder {
    color: #9AA8A6;
}

.cta-form input[type="email"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(27, 127, 122, 0.15);
}

.cta-form .btn-submit {
    height: 48px;
    padding: 0 28px;
    border-radius: 999px;
    background: var(--gradient-main);
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    border: none;
    cursor: pointer;
    white-space: nowrap;
    box-shadow: 0 4px 14px rgba(27, 127, 122, 0.25);
    transition: var(--transition);
}

.cta-form .btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(27, 127, 122, 0.35);
    filter: brightness(1.05);
}

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

.cta-form .btn-submit:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(27, 127, 122, 0.3);
}

/* ===== Footer ===== */
.site-footer {
    background: #16302D;
    color: #A9B8B5;
    padding: 64px 0 0;
    font-size: 14px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .brand-logo {
    margin-bottom: 18px;
}

.footer-brand .brand-icon {
    width: 38px;
    height: 38px;
    font-size: 15px;
}

.footer-brand .brand-text {
    color: #fff;
    font-size: 20px;
}

.footer-brand p {
    color: #A9B8B5;
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
    max-width: 300px;
}

.social-icons {
    display: flex;
    gap: 10px;
}

.social-icons a {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.15);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #A9B8B5;
    font-size: 14px;
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    transform: scale(1.05);
    text-decoration: none;
}

.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 18px;
    letter-spacing: 0.5px;
}

.footer-col a {
    display: block;
    color: #A9B8B5;
    font-size: 14px;
    margin-bottom: 10px;
    text-decoration: none;
    transition: var(--transition);
}

.footer-col a:hover {
    color: #6FD3C6;
    text-decoration: none;
    padding-left: 4px;
}

.footer-contact p {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-contact i {
    color: #6FD3C6;
    font-size: 13px;
    width: 16px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom p {
    margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
    .main-nav {
        display: none;
    }

    .hamburger {
        display: flex;
    }

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

    .cta-inner {
        flex-direction: column;
        align-items: flex-start;
        padding: 36px;
    }

    .cta-form {
        max-width: 100%;
    }

    .breadcrumb-bar .current {
        max-width: 280px;
    }
}

@media (max-width: 767px) {
    .container {
        padding: 0 16px;
    }

    .header-inner {
        padding: 0 16px;
    }

    .header-left {
        gap: 16px;
    }

    .brand-text {
        font-size: 17px;
    }

    .btn-cta {
        height: 36px;
        padding: 0 16px;
        font-size: 13px;
    }

    .search-btn {
        width: 36px;
        height: 36px;
    }

    .article-hero {
        padding: 48px 0 56px;
    }

    .article-hero h1 {
        font-size: 28px;
    }

    .article-meta {
        gap: 12px;
        font-size: 13px;
    }

    .article-main {
        padding: 32px 0 56px;
    }

    .article-body {
        font-size: 16px;
    }

    .article-body h2 {
        font-size: 24px;
    }

    .article-body h3 {
        font-size: 20px;
    }

    .article-footer-nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

    .related-section {
        padding: 48px 0;
    }

    .related-card {
        margin-bottom: 16px;
    }

    .cta-section {
        padding: 48px 0;
    }

    .cta-inner {
        padding: 28px 20px;
        border-radius: 16px;
    }

    .cta-form {
        flex-direction: column;
        gap: 12px;
    }

    .cta-form input[type="email"] {
        width: 100%;
    }

    .cta-form .btn-submit {
        width: 100%;
    }

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

    .footer-brand p {
        max-width: 100%;
    }

    .breadcrumb-bar .current {
        max-width: 200px;
    }
}

@media (max-width: 520px) {
    .brand-icon {
        width: 30px;
        height: 30px;
        font-size: 12px;
    }

    .header-right .search-btn {
        display: none;
    }

    .article-hero h1 {
        font-size: 24px;
    }

    .article-meta {
        gap: 10px;
        flex-direction: column;
        align-items: flex-start;
    }

    .article-cover {
        border-radius: 14px;
        margin-bottom: 28px;
    }

    .article-body blockquote {
        padding: 14px 18px;
    }
}

/* roulang page: category2 */
:root {
            --primary: #1B7F7A;
            --primary-dark: #146662;
            --primary-light: #2FB8A7;
            --accent: #C49A5B;
            --bg: #F4F8F7;
            --card-bg: #FFFFFF;
            --text-heading: #16302D;
            --text-body: #405654;
            --text-muted: #5E7170;
            --border: #E4ECEA;
            --radius-large: 24px;
            --radius-card: 20px;
            --radius-small: 8px;
            --shadow-card: 0 6px 24px rgba(22, 48, 45, 0.08);
            --shadow-hover: 0 16px 40px rgba(22, 48, 45, 0.14);
            --shadow-focus: 0 0 0 4px rgba(27, 127, 122, 0.25);
            --gradient-main: linear-gradient(135deg, #1B7F7A 0%, #2FB8A7 55%, #6FD3C6 100%);
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
            --nav-height: 64px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Navigation ===== */
        .main-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(228, 236, 234, 0.7);
            z-index: 1000;
            display: flex;
            align-items: center;
        }

        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: 1200px;
        }

        .nav-left {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--gradient-main);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(27, 127, 122, 0.3);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: 0.5px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
        }

        .nav-links a {
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-body);
            padding: 6px 4px;
            position: relative;
            white-space: nowrap;
            transition: color 0.2s ease;
        }

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

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

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .nav-search {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: transparent;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-body);
            font-size: 16px;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .nav-search:hover {
            background: rgba(27, 127, 122, 0.1);
            color: var(--primary);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 40px;
            padding: 0 22px;
            border-radius: 999px;
            background: var(--gradient-main);
            color: #fff;
            font-size: 14.5px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.2s ease;
            box-shadow: 0 4px 14px rgba(27, 127, 122, 0.3);
            white-space: nowrap;
        }

        .btn-cta:hover {
            background: linear-gradient(135deg, #1B7F7A 0%, #34C4B0 55%, #7ADACC 100%);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(27, 127, 122, 0.35);
            color: #fff;
        }

        .btn-cta:active {
            transform: translateY(0);
            box-shadow: 0 3px 10px rgba(27, 127, 122, 0.25);
        }

        .btn-cta:focus-visible {
            box-shadow: var(--shadow-focus);
        }

        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: transparent;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            border: 1px solid var(--border);
        }

        .hamburger span {
            width: 18px;
            height: 2px;
            background: var(--text-heading);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        @media (max-width: 1023px) {
            .nav-links {
                display: none;
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px 24px;
                box-shadow: 0 16px 40px rgba(22, 48, 45, 0.12);
                border-bottom: 1px solid var(--border);
                gap: 4px;
            }

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

            .nav-links a {
                display: block;
                padding: 12px 0;
                font-size: 16px;
                width: 100%;
                border-bottom: 1px solid rgba(228, 236, 234, 0.5);
            }

            .nav-links a:last-child {
                border-bottom: none;
            }

            .nav-links a.active::after {
                display: none;
            }

            .hamburger {
                display: flex;
            }
        }

        @media (max-width: 640px) {
            .nav-search {
                display: none;
            }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            padding-top: calc(var(--nav-height) + 48px);
            padding-bottom: 48px;
            background: linear-gradient(135deg, rgba(27, 127, 122, 0.08) 0%, rgba(47, 184, 167, 0.05) 60%, rgba(196, 154, 91, 0.06) 100%);
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 40px;
            right: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(27, 127, 122, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 40px;
        }

        .page-hero h1 {
            font-size: clamp(30px, 4vw, 42px);
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: 12px;
            position: relative;
            padding-bottom: 16px;
        }

        .page-hero h1::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 3px;
            border-radius: 2px;
            background: var(--gradient-main);
        }

        .page-hero .hero-desc {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 480px;
            line-height: 1.7;
            text-align: right;
        }

        @media (max-width: 768px) {
            .page-hero {
                padding-top: calc(var(--nav-height) + 32px);
                padding-bottom: 32px;
            }

            .page-hero .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }

            .page-hero .hero-desc {
                text-align: left;
                max-width: 100%;
                font-size: 15px;
            }
        }

        /* ===== Section spacing ===== */
        .section-block {
            padding: var(--spacing-section) 0;
        }

        .section-block:nth-child(even) {
            background: #fff;
        }

        @media (max-width: 767px) {
            .section-block {
                padding: var(--spacing-section-mobile) 0;
            }
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 8px;
        }

        .section-header h2 {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ===== Timeline ===== */
        .timeline-wrap {
            position: relative;
            padding: 20px 0;
        }

        .timeline-wrap::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 2px;
            height: 100%;
            background: linear-gradient(to bottom, rgba(27, 127, 122, 0.15), rgba(47, 184, 167, 0.4), rgba(27, 127, 122, 0.15));
        }

        .timeline-item {
            position: relative;
            width: 50%;
            padding: 24px 40px 24px 0;
            margin-bottom: 24px;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
            padding: 24px 0 24px 40px;
        }

        .timeline-dot {
            position: absolute;
            top: 36px;
            right: -8px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: #fff;
            border: 3px solid var(--primary);
            box-shadow: 0 0 0 4px rgba(27, 127, 122, 0.15);
            z-index: 2;
        }

        .timeline-item:nth-child(even) .timeline-dot {
            right: auto;
            left: -8px;
        }

        .timeline-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 28px 32px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: all 0.2s ease;
            position: relative;
            overflow: hidden;
        }

        .timeline-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--gradient-main);
            opacity: 0.7;
        }

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

        .timeline-year {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(27, 127, 122, 0.08);
            border-radius: 999px;
            padding: 4px 16px;
            margin-bottom: 14px;
        }

        .timeline-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .timeline-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .timeline-wrap::before {
                left: 12px;
            }

            .timeline-item,
            .timeline-item:nth-child(even) {
                width: 100%;
                left: 0;
                padding: 0 0 0 40px;
                margin-bottom: 20px;
            }

            .timeline-dot,
            .timeline-item:nth-child(even) .timeline-dot {
                left: 4px;
                right: auto;
                top: 32px;
            }

            .timeline-card {
                padding: 22px 24px;
            }
        }

        /* ===== Insight directions ===== */
        .directions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 20px;
        }

        .direction-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            transition: all 0.2s ease;
            position: relative;
            overflow: hidden;
        }

        .direction-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--gradient-main);
            opacity: 0;
            transition: opacity 0.2s ease;
        }

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

        .direction-card:hover::after {
            opacity: 1;
        }

        .direction-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(27, 127, 122, 0.12), rgba(47, 184, 167, 0.12));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .direction-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-heading);
            margin-bottom: 10px;
        }

        .direction-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .direction-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .direction-tags .tag {
            font-size: 12.5px;
            font-weight: 500;
            color: var(--primary);
            background: rgba(27, 127, 122, 0.06);
            border: 1px solid rgba(27, 127, 122, 0.15);
            border-radius: 999px;
            padding: 3px 12px;
        }

        @media (max-width: 1023px) {
            .directions-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .directions-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Recommendation cards ===== */
        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 20px;
        }

        .recommend-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            transition: all 0.2s ease;
            display: flex;
            flex-direction: column;
        }

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

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

        .recommend-img {
            height: 190px;
            overflow: hidden;
            position: relative;
        }

        .recommend-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .recommend-img::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(to bottom, rgba(22, 48, 45, 0) 60%, rgba(22, 48, 45, 0.3));
        }

        .recommend-card .rec-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 500;
            border-radius: 6px;
            padding: 3px 10px;
        }

        .recommend-body {
            padding: 20px 24px 24px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .recommend-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .recommend-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 14px;
            flex-grow: 1;
        }

        .recommend-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s ease;
        }

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

        @media (max-width: 1023px) {
            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .recommend-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 12px;
            background: var(--bg);
            overflow: hidden;
            transition: all 0.2s ease;
        }

        .faq-item.active {
            background: #EEF6F4;
            border-color: rgba(27, 127, 122, 0.3);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
        }

        .faq-question .q-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--primary);
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .faq-question .q-arrow {
            margin-left: auto;
            color: var(--text-muted);
            font-size: 14px;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.active .q-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            padding: 0 24px 0 66px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            padding: 0 24px 20px 66px;
            max-height: 300px;
        }

        @media (max-width: 640px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-answer,
            .faq-item.active .faq-answer {
                padding-left: 18px;
                padding-right: 18px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--gradient-main);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: 30%;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            z-index: 1;
        }

        .cta-content {
            color: #fff;
            max-width: 440px;
        }

        .cta-content h2 {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 10px;
        }

        .cta-content p {
            font-size: 16px;
            line-height: 1.7;
            opacity: 0.9;
            margin-bottom: 0;
        }

        .cta-form {
            display: flex;
            gap: 0;
            max-width: 480px;
            width: 100%;
            background: #fff;
            border-radius: 16px;
            padding: 6px;
            box-shadow: 0 8px 30px rgba(22, 48, 45, 0.15);
        }

        .cta-form input {
            flex: 1;
            height: 48px;
            padding: 0 16px;
            border: 1px solid #DDE5E3;
            border-radius: 12px;
            font-size: 15px;
            color: var(--text-heading);
            background: transparent;
            border: none;
        }

        .cta-form input::placeholder {
            color: #9AA8A6;
        }

        .cta-form input:focus {
            box-shadow: var(--shadow-focus);
            border-radius: 12px;
        }

        .cta-form button {
            height: 48px;
            padding: 0 28px;
            border-radius: 999px;
            background: var(--gradient-main);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .cta-form button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(27, 127, 122, 0.35);
        }

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

        .cta-form button:focus-visible {
            box-shadow: var(--shadow-focus);
        }

        @media (max-width: 1023px) {
            .cta-inner {
                flex-direction: column;
                text-align: center;
            }

            .cta-content {
                max-width: 100%;
            }

            .cta-form {
                max-width: 100%;
            }
        }

        @media (max-width: 640px) {
            .cta-section {
                padding: 48px 0;
            }

            .cta-form {
                flex-direction: column;
                gap: 8px;
                background: transparent;
                box-shadow: none;
                padding: 0;
            }

            .cta-form input {
                border: 1px solid #DDE5E3;
                background: #fff;
                width: 100%;
            }

            .cta-form button {
                width: 100%;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #16302D;
            color: #A9B8B5;
            padding: 64px 0 0;
            font-size: 14.5px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }

        .footer-brand .brand-text {
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #A9B8B5;
            max-width: 320px;
            margin-bottom: 20px;
        }

        .social-icons {
            display: flex;
            gap: 10px;
        }

        .social-icons a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: all 0.2s ease;
        }

        .social-icons a:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            color: #fff;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--primary-light);
            border-radius: 2px;
        }

        .footer-col a {
            display: block;
            color: #A9B8B5;
            padding: 5px 0;
            font-size: 14px;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-col a:hover {
            color: #6FD3C6;
            padding-left: 6px;
        }

        .footer-contact p {
            padding: 5px 0;
            color: #A9B8B5;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
        }

        .footer-contact i {
            color: #6FD3C6;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-bottom p {
            margin: 0;
        }

        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: var(--bg);
            padding: 84px 0 0;
            font-size: 13px;
            color: var(--text-muted);
        }

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

        .breadcrumb-bar a {
            color: var(--text-muted);
            transition: color 0.2s ease;
        }

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

        .breadcrumb-bar .sep {
            color: rgba(94, 113, 112, 0.4);
        }

        .breadcrumb-bar .current {
            color: var(--text-heading);
            font-weight: 500;
        }

/* roulang page: category3 */
/* ========== Design Variables ========== */
        :root {
            --primary: #1B7F7A;
            --primary-dark: #146561;
            --secondary: #2FB8A7;
            --accent: #C49A5B;
            --bg: #F4F8F7;
            --white: #FFFFFF;
            --ink: #16302D;
            --gray: #5E7170;
            --gray-light: #9AA8A6;
            --border: #E4ECEA;
            --bg-soft: #EEF6F4;
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 8px rgba(22, 48, 45, 0.06);
            --shadow: 0 6px 24px rgba(22, 48, 45, 0.08);
            --shadow-lg: 0 16px 40px rgba(22, 48, 45, 0.14);
            --transition: 0.2s ease;
            --gradient: linear-gradient(135deg, #1B7F7A 0%, #2FB8A7 55%, #6FD3C6 100%);
            --font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 88px;
        }

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.75;
            color: var(--ink);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        ul,
        ol {
            list-style: none;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ========== Header / Navigation ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 64px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(228, 236, 234, 0.7);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

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

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: var(--shadow-sm);
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            display: inline-block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--ink);
            border-radius: var(--radius-sm);
            position: relative;
            transition: color var(--transition), background var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(27, 127, 122, 0.06);
        }

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .header-search-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--ink);
            font-size: 15px;
            border-radius: 50%;
            cursor: pointer;
            transition: background var(--transition), color var(--transition);
        }

        .header-search-btn:hover {
            color: var(--primary);
            background: rgba(27, 127, 122, 0.08);
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 40px;
            padding: 0 20px;
            border-radius: var(--radius-pill);
            background: var(--gradient);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(27, 127, 122, 0.22);
            transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
        }

        .header-cta:hover {
            filter: brightness(1.05);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(27, 127, 122, 0.3);
            color: #fff;
        }

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

        .header-cta:focus-visible,
        .header-search-btn:focus-visible,
        .nav-link:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            cursor: pointer;
            border-radius: 8px;
        }

        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--ink);
            border-radius: 2px;
            margin: 2px 0;
            transition: transform var(--transition), opacity var(--transition);
        }

        .hamburger.open span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.open span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }

        /* Mobile drawer */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            padding: 16px 20px 24px;
            box-shadow: 0 16px 40px rgba(22, 48, 45, 0.12);
            z-index: 999;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        }

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

        .mobile-drawer .nav-link {
            display: block;
            padding: 12px 16px;
            font-size: 16px;
            border-bottom: 1px solid var(--border);
        }

        .mobile-drawer .nav-link:last-child {
            border-bottom: none;
        }

        .mobile-drawer .nav-link.active {
            background: rgba(27, 127, 122, 0.08);
            border-radius: var(--radius-sm);
        }

        .mobile-drawer .mobile-cta {
            display: block;
            margin-top: 12px;
            text-align: center;
        }

        /* ========== Category Hero ========== */
        .category-hero {
            margin-top: 64px;
            padding: 60px 0 40px;
            background: linear-gradient(135deg, rgba(27, 127, 122, 0.08) 0%, rgba(47, 184, 167, 0.05) 100%), var(--bg);
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            background: var(--gradient);
            opacity: 0.06;
            border-radius: 50%;
            filter: blur(20px);
        }

        .category-hero .hero-row {
            display: flex;
            align-items: center;
            gap: 40px;
        }

        .category-hero .hero-left {
            flex: 1;
        }

        .category-hero .hero-eyebrow {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--accent);
            text-transform: uppercase;
            background: rgba(196, 154, 91, 0.12);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
        }

        .category-hero h1 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 700;
            line-height: 1.2;
            color: var(--ink);
            margin-bottom: 12px;
        }

        .category-hero .hero-sub {
            font-size: 16px;
            color: var(--gray);
            max-width: 520px;
            line-height: 1.7;
        }

        .category-hero .hero-right {
            width: 320px;
            flex-shrink: 0;
        }

        .hero-card {
            height: 180px;
            border-radius: var(--radius-lg);
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .hero-card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(22, 48, 45, 0.45) 0%, rgba(27, 127, 122, 0) 60%);
        }

        .hero-card-content {
            position: absolute;
            left: 16px;
            bottom: 14px;
            z-index: 1;
            color: #fff;
        }

        .hero-card-content .card-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 1px;
            color: #fff;
            background: var(--accent);
            padding: 2px 10px;
            border-radius: var(--radius-pill);
            margin-bottom: 6px;
        }

        .hero-card-content p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.5;
        }

        /* ========== Category Main / Toc Layout ========== */
        .category-main {
            padding: 60px 0 20px;
        }

        .category-main .row {
            display: flex;
            gap: 32px;
        }

        .category-main .columns {
            padding: 0;
        }

        /* Toc Sidebar */
        .toc-sidebar {
            width: 260px;
            flex-shrink: 0;
        }

        .toc-inner {
            position: sticky;
            top: 100px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
        }

        .toc-inner h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .toc-inner h4 i {
            color: var(--primary);
            font-size: 14px;
        }

        .toc-list li {
            margin-bottom: 4px;
        }

        .toc-list li a {
            display: block;
            padding: 8px 12px;
            font-size: 14px;
            font-weight: 500;
            color: var(--gray);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all var(--transition);
        }

        .toc-list li a:hover {
            color: var(--primary);
            background: rgba(27, 127, 122, 0.05);
            border-left-color: var(--accent);
        }

        .toc-list li a.active {
            color: var(--primary);
            background: rgba(27, 127, 122, 0.08);
            border-left-color: var(--primary);
            font-weight: 600;
        }

        .toc-cta {
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 20px;
            padding: 10px 16px;
            background: var(--gradient);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .toc-cta:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(27, 127, 122, 0.25);
        }

        /* Content Area */
        .content-area {
            flex: 1;
            min-width: 0;
        }

        .content-section {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px;
            margin-bottom: 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }

        .content-section:hover {
            box-shadow: var(--shadow);
        }

        .content-section .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(196, 154, 91, 0.1);
            padding: 3px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
        }

        .content-section h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--ink);
            margin-bottom: 16px;
        }

        .content-section h2 i {
            color: var(--primary);
            margin-right: 8px;
            font-size: 20px;
        }

        .content-section p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--gray);
            margin-bottom: 16px;
        }

        .content-section p:last-child {
            margin-bottom: 0;
        }

        .content-list {
            margin: 16px 0;
        }

        .content-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--ink);
            border-bottom: 1px dashed var(--border);
        }

        .content-list li:last-child {
            border-bottom: none;
        }

        .content-list li i {
            color: var(--primary);
            margin-top: 4px;
            font-size: 14px;
            flex-shrink: 0;
        }

        .content-steps {
            margin: 16px 0 0;
        }

        .content-steps li {
            display: flex;
            gap: 14px;
            padding: 10px 0;
            font-size: 15px;
            color: var(--gray);
            border-bottom: 1px dashed var(--border);
        }

        .content-steps li:last-child {
            border-bottom: none;
        }

        .content-steps li .step-num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--gradient);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .content-steps li span {
            flex: 1;
            line-height: 1.7;
        }

        .content-steps li strong {
            color: var(--ink);
            font-weight: 600;
        }

        .callout-box {
            background: var(--bg-soft);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 16px 20px;
            margin-top: 16px;
            font-size: 14px;
            color: var(--gray);
            line-height: 1.7;
        }

        .callout-box i {
            color: var(--primary);
            margin-right: 6px;
        }

        .content-img-block {
            margin-top: 20px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            height: 160px;
            background-size: cover;
            background-position: center;
        }

        .content-img-block .img-mask {
            position: absolute;
            inset: 0;
            background: linear-gradient(to right, rgba(27, 127, 122, 0.35) 0%, rgba(22, 48, 45, 0.05) 100%);
            display: flex;
            align-items: flex-end;
            padding: 16px;
        }

        .content-img-block .img-mask span {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            text-shadow: 0 2px 6px rgba(22, 48, 45, 0.4);
        }

        /* ========== Related Section ========== */
        .related-section {
            padding: 60px 0 40px;
            background: var(--white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }

        .section-head h2 {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 700;
            color: var(--ink);
            position: relative;
            padding-left: 16px;
        }

        .section-head h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 5px;
            height: 22px;
            border-radius: 3px;
            background: var(--gradient);
        }

        .section-head .view-all {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }

        .section-head .view-all:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

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

        .rel-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .rel-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(27, 127, 122, 0.3);
        }

        .rel-card .card-img {
            height: 160px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .rel-card .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(22, 48, 45, 0.2) 0%, transparent 50%);
        }

        .rel-card .card-body {
            padding: 20px;
        }

        .rel-card .card-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--ink);
            margin-bottom: 8px;
        }

        .rel-card .card-body p {
            font-size: 14px;
            color: var(--gray);
            line-height: 1.6;
            margin-bottom: 12px;
        }

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

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

        .rel-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 1;
            background: var(--accent);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
        }

        /* ========== FAQ Section ========== */
        .faq-section {
            padding: 60px 0;
            background: var(--bg);
        }

        .faq-section .container {
            max-width: 900px;
        }

        .faq-section .section-head {
            justify-content: center;
            text-align: center;
            margin-bottom: 36px;
        }

        .faq-section .section-head h2 {
            padding-left: 0;
        }

        .faq-section .section-head h2::before {
            display: none;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-item.open {
            background: var(--bg-soft);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 24px;
            cursor: pointer;
            text-align: left;
            background: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            transition: color var(--transition);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--primary);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .faq-question .faq-arrow {
            margin-left: auto;
            font-size: 14px;
            color: var(--gray-light);
            transition: transform var(--transition);
        }

        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }

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

        .faq-answer-inner {
            padding: 0 24px 18px 66px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--gray);
        }

        /* ========== CTA Section ========== */
        .cta-section {
            padding: 72px 0;
            background: var(--gradient);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            z-index: 1;
        }

        .cta-left {
            flex: 1;
        }

        .cta-left h2 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .cta-left p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            max-width: 480px;
        }

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

        .cta-btn-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-pill);
            background: #fff;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            box-shadow: 0 8px 20px rgba(22, 48, 45, 0.15);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .cta-btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(22, 48, 45, 0.22);
            color: var(--primary-dark);
        }

        .cta-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            height: 48px;
            padding: 0 28px;
            border-radius: var(--radius-pill);
            border: 1.5px solid rgba(255, 255, 255, 0.7);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            transition: background var(--transition), border-color var(--transition);
        }

        .cta-btn-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #16302D;
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }

        .footer-brand .brand-text {
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #A9B8B5;
            margin-bottom: 20px;
        }

        .social-icons {
            display: flex;
            gap: 10px;
        }

        .social-icons a {
            width: 36px;
            height: 36px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }

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

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 30px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: #A9B8B5;
            padding: 5px 0;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-col a:hover {
            color: #6FD3C6;
            padding-left: 6px;
        }

        .footer-contact p {
            font-size: 14px;
            color: #A9B8B5;
            padding: 5px 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact p i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .category-hero .hero-row {
                flex-direction: column;
                gap: 24px;
            }

            .category-hero .hero-right {
                width: 100%;
            }

            .hero-card {
                height: 200px;
            }

            .category-main .row {
                flex-direction: column;
            }

            .toc-sidebar {
                width: 100%;
            }

            .toc-inner {
                position: static;
                margin-bottom: 24px;
            }

            .toc-list {
                display: flex;
                flex-wrap: wrap;
                gap: 8px;
            }

            .toc-list li a {
                border-left: none;
                background: rgba(27, 127, 122, 0.06);
                padding: 6px 14px;
            }

            .toc-list li a.active {
                background: rgba(27, 127, 122, 0.12);
            }

            .toc-cta {
                display: none;
            }

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

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

            .cta-left p {
                margin: 0 auto;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }

            .brand-text {
                font-size: 16px;
            }

            .header-cta {
                display: none;
            }

            .header-search-btn {
                width: 36px;
                height: 36px;
            }

            .category-hero {
                padding: 40px 0 32px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .category-hero .hero-sub {
                font-size: 14px;
            }

            .content-section {
                padding: 24px 20px;
            }

            .content-section h2 {
                font-size: 20px;
            }

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

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

            .faq-answer-inner {
                padding: 0 16px 16px 56px;
                font-size: 14px;
            }

            .cta-section {
                padding: 48px 0;
            }

            .cta-right {
                flex-direction: column;
                width: 100%;
                gap: 12px;
            }

            .cta-btn-light,
            .cta-btn-outline {
                width: 100%;
                justify-content: center;
            }

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

        @media (max-width: 520px) {
            .header-inner {
                gap: 8px;
            }

            .header-search-btn {
                display: none;
            }

            .category-main {
                padding-top: 40px;
            }

            .content-section {
                padding: 20px 16px;
            }

            .faq-question .faq-icon {
                width: 24px;
                height: 24px;
                font-size: 12px;
            }

            .faq-answer-inner {
                padding: 0 16px 14px 46px;
            }
        }

/* roulang page: category4 */
:root {
    --primary: #1B7F7A;
    --primary-light: #2FB8A7;
    --primary-pale: #6FD3C6;
    --gold: #C49A5B;
    --bg: #F4F8F7;
    --white: #FFFFFF;
    --dark: #16302D;
    --muted: #5E7170;
    --border: #E4ECEA;
    --radius-lg: 20px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow: 0 6px 24px rgba(22,48,45,0.08);
    --shadow-hover: 0 16px 40px rgba(22,48,45,0.14);
    --gradient: 135deg, #1B7F7A 0%, #2FB8A7 55%, #6FD3C6 100%;
    --gradient-soft: 135deg, rgba(27,127,122,0.12) 0%, rgba(47,184,167,0.08) 55%, rgba(111,211,198,0.10) 100%;
    --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --transition: 0.2s ease;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-stack);
    font-size: 16px;
    line-height: 1.75;
    color: var(--dark);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary); }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
ul { list-style: none; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.row { max-width: 1200px; }

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: all var(--transition);
    white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(var(--gradient));
    color: #fff;
    box-shadow: 0 4px 16px rgba(27,127,122,0.25);
}
.btn-primary:hover {
    color: #fff;
    filter: brightness(1.05);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(27,127,122,0.32);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px rgba(27,127,122,0.25);
}
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}
.btn-outline:hover {
    background: rgba(27,127,122,0.08);
    color: var(--primary);
    transform: translateY(-2px);
}
.btn-outline:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px rgba(27,127,122,0.15);
}
.btn-sm { height: 40px; padding: 0 20px; font-size: 14px; }
.btn-lg { height: 52px; padding: 0 36px; font-size: 16px; }

/* ==================== 导航 ==================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    width: 100%;
    height: 64px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(228, 236, 234, 0.7);
    transition: box-shadow var(--transition);
}
.site-header.scrolled { box-shadow: 0 4px 24px rgba(22,48,45,0.06); }

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 20px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 32px;
    min-width: 0;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.brand-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(var(--gradient));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 15px;
    box-shadow: 0 4px 12px rgba(27,127,122,0.3);
}
.brand-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
    scrollbar-width: none;
}
.main-nav::-webkit-scrollbar { display: none; }
.nav-link {
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
    border-radius: 8px;
    position: relative;
    white-space: nowrap;
    transition: color var(--transition), background var(--transition);
}
.nav-link:hover {
    color: var(--primary);
    background: rgba(27,127,122,0.06);
}
.nav-link.active {
    color: var(--primary);
    font-weight: 600;
}
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.search-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark);
    font-size: 15px;
    transition: all var(--transition);
}
.search-toggle:hover {
    background: rgba(27,127,122,0.08);
    color: var(--primary);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}
.hamburger span {
    width: 22px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==================== 分类 Hero ==================== */
.category-hero {
    position: relative;
    padding: 120px 0 64px;
    background:
        linear-gradient(135deg, rgba(27,127,122,0.88) 0%, rgba(47,184,167,0.72) 55%, rgba(111,211,198,0.65) 100%),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    color: #fff;
    overflow: hidden;
}
.category-hero::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -40px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
}
.category-hero::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: 20%;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
}
.hero-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}
.hero-left {
    flex: 1;
}
.hero-left h1 {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 12px;
}
.hero-left p {
    font-size: 16px;
    line-height: 1.7;
    color: rgba(255,255,255,0.92);
    max-width: 520px;
}
.hero-right {
    flex: 0 0 340px;
    display: flex;
    justify-content: flex-end;
}
.hero-cta-card {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: var(--radius-lg);
    padding: 28px;
    backdrop-filter: blur(4px);
    text-align: center;
}
.hero-cta-card i {
    font-size: 32px;
    margin-bottom: 12px;
    opacity: 0.9;
}
.hero-cta-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}
.hero-cta-card p {
    font-size: 13px;
    opacity: 0.85;
    margin-bottom: 16px;
    line-height: 1.6;
}

/* ==================== 区块通用 ==================== */
.section-padding { padding: 80px 0; }
.section-padding-sm { padding: 56px 0; }
.bg-white { background: var(--white); }
.bg-alt { background: var(--bg); }

.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 48px;
}
.section-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--gold);
    color: #fff;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
    margin-bottom: 12px;
}
.section-header h2 {
    font-size: clamp(26px, 3vw, 40px);
    font-weight: 600;
    line-height: 1.3;
    color: var(--dark);
    margin-bottom: 12px;
}
.section-header p {
    font-size: 16px;
    color: var(--muted);
    line-height: 1.7;
}

/* ==================== 时间线 ==================== */
.timeline-section {
    position: relative;
    padding: 80px 0;
    background: var(--white);
}
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px 0;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    transform: translateX(-50%);
    background: linear-gradient(to bottom, var(--primary-light), var(--primary-pale), var(--primary));
    opacity: 0.35;
}
.timeline-item {
    position: relative;
    width: 50%;
    padding: 16px 48px;
}
.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}
.timeline-item:nth-child(even) {
    left: 50%;
}
.timeline-dot {
    position: absolute;
    top: 28px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--primary);
    box-shadow: 0 0 0 4px rgba(27,127,122,0.15);
    z-index: 2;
}
.timeline-item:nth-child(odd) .timeline-dot {
    right: -8px;
}
.timeline-item:nth-child(even) .timeline-dot {
    left: -8px;
}
.timeline-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    display: inline-block;
    max-width: 100%;
    text-align: left;
}
.timeline-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    border-color: rgba(27,127,122,0.25);
}
.timeline-year {
    display: inline-block;
    padding: 3px 12px;
    background: linear-gradient(var(--gradient));
    color: #fff;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
    margin-bottom: 10px;
}
.timeline-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}
.timeline-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.7;
}

/* ==================== 观察领域卡片 ==================== */
.domain-section {
    padding: 80px 0;
    background: var(--bg);
}
.domain-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.domain-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(22,48,45,0.04);
}
.domain-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-6px);
    border-color: rgba(27,127,122,0.3);
}
.domain-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 20px;
    background: linear-gradient(var(--gradient-soft));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary);
}
.domain-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}
.domain-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.65;
}

/* ==================== 数据徽章 ==================== */
.stats-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #16302D 0%, #1B3B38 100%);
    position: relative;
    overflow: hidden;
}
.stats-section::before {
    content: '';
    position: absolute;
    top: -50px;
    right: -50px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 40px solid rgba(255,255,255,0.03);
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
    z-index: 2;
}
.stat-item {
    text-align: center;
    padding: 32px 16px;
}
.stat-circle {
    width: 96px;
    height: 96px;
    margin: 0 auto 16px;
    border-radius: 50%;
    background: var(--white);
    border: 2px solid transparent;
    background-image: linear-gradient(#fff, #fff), linear-gradient(var(--gradient));
    background-origin: border-box;
    background-clip: padding-box, border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition);
}
.stat-circle:hover { transform: scale(1.03); }
.stat-number {
    font-size: clamp(24px, 2.5vw, 36px);
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}
.stat-unit {
    font-size: 12px;
    color: var(--muted);
    font-weight: 500;
}
.stat-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: rgba(255,255,255,0.95);
    margin-bottom: 4px;
}
.stat-item p {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
}

/* ==================== FAQ ==================== */
.faq-section {
    padding: 80px 0;
    background: var(--white);
}
.faq-list {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition);
}
.faq-item:hover { border-color: rgba(27,127,122,0.25); }
.faq-item.is-active {
    background: #EEF6F4;
    border-color: rgba(27,127,122,0.3);
}
.faq-question {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    width: 100%;
    text-align: left;
}
.faq-question .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--primary);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
    transition: all var(--transition);
}
.faq-item.is-active .faq-icon {
    background: var(--primary);
    color: #fff;
}
.faq-question .faq-arrow {
    margin-left: auto;
    transition: transform 0.3s ease;
    color: var(--muted);
    font-size: 14px;
}
.faq-item.is-active .faq-arrow { transform: rotate(180deg); }
.faq-answer {
    padding: 0 24px 20px 66px;
    font-size: 15px;
    line-height: 1.7;
    color: var(--muted);
    display: none;
}
.faq-item.is-active .faq-answer { display: block; }

/* ==================== CTA 订阅 ==================== */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(var(--gradient));
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    top: -40px;
    left: -40px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
}
.cta-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    background: var(--white);
    border-radius: 24px;
    padding: 48px 56px;
    box-shadow: 0 20px 60px rgba(22,48,45,0.18);
}
.cta-content { flex: 1; }
.cta-content h2 {
    font-size: clamp(24px, 2.6vw, 34px);
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}
.cta-content p {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.7;
}
.cta-form {
    flex: 0 0 380px;
    display: flex;
    gap: 12px;
}
.cta-form input[type="email"] {
    flex: 1;
    height: 48px;
    padding: 0 20px;
    border: 1px solid #DDE5E3;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    color: var(--dark);
    background: var(--white);
    transition: all var(--transition);
}
.cta-form input[type="email"]::placeholder { color: #9AA8A6; }
.cta-form input[type="email"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(27,127,122,0.15);
}

/* ==================== 相关推荐 ==================== */
.recommend-section {
    padding: 80px 0;
    background: var(--bg);
}
.recommend-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.recommend-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(22,48,45,0.04);
}
.recommend-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    border-color: rgba(27,127,122,0.25);
}
.recommend-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}
.recommend-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.recommend-card:hover .recommend-cover img { transform: scale(1.05); }
.recommend-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(22,48,45,0.4), transparent 60%);
}
.recommend-body {
    padding: 24px;
}
.recommend-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
    line-height: 1.4;
}
.recommend-body p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.65;
    margin-bottom: 14px;
}
.recommend-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition);
}
.recommend-link:hover { gap: 10px; }

/* ==================== 页脚 ==================== */
.site-footer {
    background: #16302D;
    color: rgba(255,255,255,0.8);
    padding: 64px 0 0;
    font-size: 14px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-brand .brand-logo { margin-bottom: 16px; }
.footer-brand .brand-text { color: #fff; }
.footer-brand .brand-icon {
    background: linear-gradient(var(--gradient));
}
.footer-brand p {
    color: #A9B8B5;
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
    max-width: 280px;
}
.social-icons {
    display: flex;
    gap: 12px;
}
.social-icons a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1.5px solid rgba(255,255,255,0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.75);
    transition: all var(--transition);
}
.social-icons a:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.footer-col h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}
.footer-col a {
    display: block;
    padding: 6px 0;
    color: #A9B8B5;
    transition: color var(--transition);
}
.footer-col a:hover { color: #6FD3C6; }
.footer-contact p {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
    color: #A9B8B5;
}
.footer-contact p i {
    width: 18px;
    color: #6FD3C6;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.6);
}
.footer-bottom p { margin: 0; }

/* ==================== 响应式 ==================== */
@media (max-width: 1023px) {
    .section-padding { padding: 64px 0; }
    .section-padding-sm { padding: 48px 0; }
    .domain-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .recommend-grid { grid-template-columns: repeat(2, 1fr); }
    .cta-inner { flex-direction: column; padding: 40px; }
    .cta-form { flex: 0 0 auto; width: 100%; max-width: 440px; }
    .hero-inner { flex-direction: column; }
    .hero-right { flex: 1; justify-content: center; }
    .hero-cta-card { width: 100%; max-width: 340px; }
    .main-nav { gap: 2px; }
    .nav-link { padding: 8px 10px; font-size: 13px; }
    .header-left { gap: 16px; }
}

@media (max-width: 767px) {
    .section-padding { padding: 48px 0; }
    .section-padding-sm { padding: 32px 0; }
    .container { padding: 0 16px; }

    .site-header { height: 58px; }
    .header-inner { height: 58px; }

    .main-nav {
        position: fixed;
        top: 58px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
        gap: 4px;
        box-shadow: 0 12px 32px rgba(22,48,45,0.12);
        display: none;
    }
    .main-nav.open { display: flex; }
    .nav-link {
        padding: 14px 16px;
        font-size: 15px;
        border-radius: 10px;
    }
    .nav-link.active { background: rgba(27,127,122,0.08); }
    .nav-link.active::after { display: none; }

    .hamburger { display: flex; }
    .search-toggle { display: none; }
    .header-right .btn-sm { display: none; }

    .category-hero { padding: 100px 0 48px; }
    .hero-left h1 { font-size: 30px; }

    .timeline::before {
        left: 20px;
        transform: none;
    }
    .timeline-item,
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        width: 100%;
        left: 0;
        text-align: left;
        padding: 16px 0 16px 56px;
    }
    .timeline-item:nth-child(odd) .timeline-dot,
    .timeline-item:nth-child(even) .timeline-dot {
        left: 12px;
        right: auto;
    }
    .timeline-card { max-width: 100%; }

    .domain-grid { grid-template-columns: 1fr; gap: 16px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .stat-circle { width: 80px; height: 80px; }
    .stat-number { font-size: 24px; }
    .recommend-grid { grid-template-columns: 1fr; gap: 16px; }

    .faq-question { padding: 16px 18px; font-size: 15px; }
    .faq-answer { padding: 0 18px 18px 18px; }

    .cta-section { padding: 48px 0; }
    .cta-inner { padding: 32px 20px; flex-direction: column; gap: 24px; }
    .cta-form { flex-direction: column; }
    .cta-form input[type="email"] { width: 100%; }
    .cta-form .btn { width: 100%; }

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

@media (max-width: 520px) {
    .brand-text { font-size: 17px; }
    .hero-cta-card { padding: 24px 18px; }
    .stats-grid { gap: 12px; }
    .stat-circle { width: 70px; height: 70px; }
    .stat-number { font-size: 20px; }
    .stat-item { padding: 20px 8px; }
    .stat-item h4 { font-size: 13px; }
    .stat-item p { font-size: 12px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}