/* roulang page: index */
:root {
    --primary: #2B7FA3;
    --primary-dark: #1F5F7A;
    --accent: #F26531;
    --accent-hover: #F27647;
    --support: #10A87A;
    --bg: #F7F9FB;
    --card: #FFFFFF;
    --text: #1A2B3C;
    --text-secondary: #5A6B7C;
    --border: #E5EBF0;
    --radius-card: 14px;
    --radius-btn: 8px;
    --radius-tag: 999px;
    --shadow-card: 0 8px 24px rgba(26, 43, 60, 0.08);
    --shadow-hover: 0 12px 32px rgba(26, 43, 60, 0.12);
    --shadow-float: 0 12px 30px rgba(26, 43, 60, 0.1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: all 0.25s ease; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

.container-page { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.section-block { padding: 90px 0; }

/* ---------- Header / Nav ---------- */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: #fff;
    border-bottom: 1px solid var(--border);
    height: 64px;
    display: flex; align-items: center;
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.logo-block { display: flex; align-items: center; gap: 10px; }
.logo-mark {
    width: 36px; height: 36px; border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 18px; font-weight: 800;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text-cn { font-size: 17px; font-weight: 800; color: var(--text); letter-spacing: 0.5px; }
.logo-text-en { font-size: 11px; letter-spacing: 2px; color: var(--text-secondary); text-transform: uppercase; }
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a {
    font-size: 15px; font-weight: 500; color: var(--text);
    padding: 20px 0; position: relative;
}
.main-nav a:hover { color: var(--primary); }
.main-nav a.active { color: var(--primary); }
.main-nav a.active::after {
    content: ''; position: absolute; left: 0; right: 0; bottom: 0;
    height: 3px; background: var(--accent); border-radius: 3px 3px 0 0;
}
.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-search { color: var(--text-secondary); font-size: 18px; cursor: pointer; transition: color 0.25s; }
.nav-search:hover { color: var(--primary); }
.btn-nav-cta {
    background: var(--accent); color: #fff; font-size: 14px; font-weight: 600;
    padding: 10px 20px; border-radius: var(--radius-btn);
    transition: all 0.25s ease;
}
.btn-nav-cta:hover { background: var(--accent-hover); transform: translateY(1px); box-shadow: 0 6px 16px rgba(242,101,49,0.3); color: #fff; }
.nav-toggle { display: none; background: none; border: none; font-size: 24px; color: var(--text); cursor: pointer; }
.mobile-drawer {
    display: none; position: fixed; inset: 0; z-index: 200; background: #fff;
    flex-direction: column; padding: 80px 32px 32px;
}
.mobile-drawer.open { display: flex; }
.mobile-drawer a {
    font-size: 20px; font-weight: 600; color: var(--text); padding: 14px 0;
    border-bottom: 1px solid var(--border);
}
.mobile-drawer a:hover { color: var(--primary); }
.mobile-drawer .drawer-close {
    position: absolute; top: 20px; right: 24px; font-size: 28px; color: var(--text);
    background: none; border: none; cursor: pointer;
}
.mobile-drawer .drawer-cta {
    margin-top: 24px; justify-content: center; display: flex;
}

/* ---------- Hero ---------- */
.hero-section {
    position: relative;
    background: linear-gradient(135deg, #F7F9FB 0%, #EDF3F6 100%);
    overflow: hidden;
}
.hero-section::before {
    content: '';
    position: absolute; inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 5 L55 17.5 L55 42.5 L30 55 L5 42.5 L5 17.5 Z' fill='none' stroke='%232B7FA3' stroke-width='1'/%3E%3C/svg%3E");
    background-size: 60px 60px;
    opacity: 0.07;
}
.hero-inner {
    display: grid; grid-template-columns: 55% 45%;
    align-items: center; position: relative; z-index: 2;
    padding-top: 72px; padding-bottom: 72px;
    gap: 40px;
}
.hero-kicker {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(43,127,163,0.1); color: var(--primary);
    font-size: 14px; font-weight: 600; letter-spacing: 1px;
    padding: 6px 14px; border-radius: var(--radius-tag);
    margin-bottom: 20px;
}
.hero-kicker i { font-size: 12px; }
.hero-title {
    font-size: 44px; font-weight: 800; line-height: 1.25; color: var(--text);
    margin-bottom: 20px;
}
.hero-title .accent { color: var(--accent); }
.hero-subtitle {
    font-size: 18px; color: var(--text-secondary);
    max-width: 460px; margin-bottom: 32px;
    line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; margin-bottom: 40px; flex-wrap: wrap; }
.btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--accent); color: #fff; font-size: 15px; font-weight: 600;
    padding: 12px 28px; border-radius: var(--radius-btn);
    transition: all 0.25s ease;
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(1px); box-shadow: 0 8px 20px rgba(242,101,49,0.3); color: #fff; }
.btn-outline {
    display: inline-flex; align-items: center; gap: 8px;
    background: #fff; color: var(--primary); font-size: 15px; font-weight: 600;
    padding: 12px 28px; border-radius: var(--radius-btn);
    border: 1px solid var(--primary);
    transition: all 0.25s ease;
}
.btn-outline:hover { background: #F0F6FA; color: var(--primary-dark); }
.hero-trust { display: flex; gap: 28px; flex-wrap: wrap; }
.trust-item { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-secondary); }
.trust-item i { color: var(--support); font-size: 16px; }
.trust-item strong { color: var(--text); font-weight: 700; }
.hero-visual { position: relative; }
.hero-img-wrap {
    border-radius: 16px; overflow: hidden;
    box-shadow: var(--shadow-hover);
    position: relative;
}
.hero-img-wrap img { width: 100%; height: 420px; object-fit: cover; }
.hero-float-card {
    position: absolute; left: 20px; bottom: 20px;
    background: #fff; border-radius: 14px;
    box-shadow: var(--shadow-float);
    padding: 16px 22px;
    display: flex; align-items: center; gap: 14px;
    animation: floatY 3s ease-in-out infinite;
}
@keyframes floatY {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}
.float-icon { width: 42px; height: 42px; border-radius: 10px; background: rgba(16,168,122,0.12); color: var(--support); display: flex; align-items: center; justify-content: center; font-size: 18px; }
.float-label { font-size: 12px; color: var(--text-secondary); }
.float-value { font-size: 16px; font-weight: 700; color: var(--text); }

/* ---------- Section headers ---------- */
.section-kicker {
    font-size: 14px; font-weight: 600; color: var(--primary);
    letter-spacing: 1px; text-transform: uppercase;
    margin-bottom: 10px; display: inline-block;
}
.section-title {
    font-size: 32px; font-weight: 800; color: var(--text);
    line-height: 1.3; margin-bottom: 16px;
}
.section-desc { font-size: 16px; color: var(--text-secondary); max-width: 620px; line-height: 1.7; }

/* ---------- Services ---------- */
.services-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.service-card {
    background: #fff; border-radius: var(--radius-card);
    padding: 28px; box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
}
.service-card:hover { box-shadow: var(--shadow-hover); outline: 1px solid var(--primary); transform: translateY(-2px); }
.service-icon {
    width: 48px; height: 48px; border-radius: 12px;
    background: rgba(43,127,163,0.1); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; margin-bottom: 18px;
}
.service-card h3 { font-size: 20px; font-weight: 600; color: var(--text); margin-bottom: 10px; }
.service-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; margin-bottom: 14px; }
.service-link { font-size: 14px; color: var(--primary); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.service-link:hover { color: var(--accent); }
.service-link i { font-size: 12px; transition: transform 0.25s; }
.service-link:hover i { transform: translateX(4px); }
.service-banner {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-card); padding: 32px 36px;
    display: flex; align-items: center; justify-content: space-between;
    gap: 24px; flex-wrap: wrap;
}
.service-banner-text { color: #fff; flex: 1; min-width: 240px; }
.service-banner-text h3 { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.service-banner-text p { font-size: 14px; opacity: 0.85; line-height: 1.6; }
.btn-banner {
    background: var(--accent); color: #fff; font-weight: 600;
    padding: 12px 24px; border-radius: var(--radius-btn);
    display: inline-flex; align-items: center; gap: 8px;
    transition: all 0.25s; white-space: nowrap;
}
.btn-banner:hover { background: #fff; color: var(--primary); }

/* ---------- Stats ---------- */
.stats-section { background: #fff; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat-cell { text-align: center; padding: 48px 24px; position: relative; }
.stat-cell + .stat-cell::before {
    content: ''; position: absolute; left: 0; top: 50%;
    transform: translateY(-50%); height: 56px; width: 1px;
    background: var(--border);
}
.stat-number { font-size: 56px; font-weight: 800; color: var(--text); line-height: 1.1; }
.stat-number.accent { color: var(--accent); }
.stat-label { font-size: 14px; color: var(--text-secondary); margin-top: 8px; }
.stats-link-wrap { text-align: center; padding-bottom: 40px; }
.stats-link {
    display: inline-flex; align-items: center; gap: 8px;
    color: var(--primary); font-size: 15px; font-weight: 600;
}
.stats-link:hover { color: var(--accent); }
.stats-link i { transition: transform 0.25s; }
.stats-link:hover i { transform: translateX(4px); }

/* ---------- Cases ---------- */
.case-row {
    display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
    margin-bottom: 60px;
}
.case-row:last-child { margin-bottom: 0; }
.case-row.reverse .case-image { order: 2; }
.case-row.reverse .case-content { order: 1; }
.case-tag {
    display: inline-block; background: rgba(43,127,163,0.1);
    color: var(--primary); font-size: 13px; font-weight: 600;
    padding: 4px 12px; border-radius: var(--radius-tag);
    margin-bottom: 14px;
}
.case-title { font-size: 22px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.case-desc { font-size: 15px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.case-result {
    font-size: 16px; font-weight: 700; color: var(--accent);
    margin-bottom: 16px;
}
.case-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.case-link:hover { color: var(--accent); }
.case-link i { transition: transform 0.25s; }
.case-link:hover i { transform: translateX(4px); }
.case-image { border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); }
.case-image img { width: 100%; height: 280px; object-fit: cover; transition: transform 0.5s ease; }
.case-image:hover img { transform: scale(1.03); }

/* ---------- Solutions ---------- */
.solutions-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.solution-card {
    background: #fff; border-radius: var(--radius-card); padding: 32px;
    box-shadow: var(--shadow-card); transition: all 0.3s;
}
.solution-card:hover { box-shadow: var(--shadow-hover); outline: 1px solid var(--primary); }
.solution-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 16px; color: var(--text); }
.solution-list { list-style: none; }
.solution-list li {
    display: flex; align-items: flex-start; gap: 10px;
    font-size: 14px; color: var(--text-secondary);
    padding: 7px 0; line-height: 1.6;
}
.solution-list li::before {
    content: ''; flex-shrink: 0;
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--accent); margin-top: 8px;
}
.solution-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; margin-top: 12px; }
.solution-link:hover { color: var(--accent); }
.solution-link i { transition: transform 0.25s; }
.solution-link:hover i { transform: translateX(4px); }
.solution-banner {
    background: linear-gradient(120deg, #EDF3F6, #F7F9FB);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 40px; display: flex; align-items: center; justify-content: space-between;
    gap: 32px; flex-wrap: wrap;
}
.solution-banner-left { flex: 1; min-width: 260px; }
.solution-banner-left h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.solution-banner-left p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.solution-banner-link { display: inline-flex; align-items: center; gap: 8px; color: var(--primary); font-weight: 600; margin-top: 12px; }
.solution-banner-link:hover { color: var(--accent); }
.solution-banner-icons { display: flex; gap: 16px; }
.solution-banner-icons i {
    font-size: 28px; color: rgba(43,127,163,0.3);
}

/* ---------- News ---------- */
.news-section { background: #fff; }
.news-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 40px; gap: 16px; }
.news-more-link { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 600; color: var(--primary); white-space: nowrap; }
.news-more-link:hover { color: var(--accent); }
.news-more-link i { transition: transform 0.25s; }
.news-more-link:hover i { transform: translateX(4px); }
.news-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.news-card {
    background: #fff; border-radius: var(--radius-card);
    overflow: hidden; box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
    display: flex; flex-direction: column;
    border: 1px solid var(--border);
}
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); outline: 1px solid var(--primary); }
.news-thumb { height: 120px; overflow: hidden; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.news-cat {
    display: inline-block; background: #F0F6FA; color: var(--primary);
    font-size: 10px; font-weight: 600;
    padding: 3px 10px; border-radius: var(--radius-tag);
    align-self: flex-start; margin-bottom: 10px;
}
.news-title {
    font-size: 18px; font-weight: 600; color: var(--text);
    line-height: 1.45; margin-bottom: 8px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.news-excerpt {
    font-size: 14px; color: var(--text-secondary);
    line-height: 1.6; flex: 1;
    display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
    margin-bottom: 14px;
}
.news-meta {
    display: flex; align-items: center; justify-content: space-between;
    border-top: 1px solid var(--border); padding-top: 12px; margin-top: auto;
}
.news-date { font-size: 13px; color: var(--text-secondary); }
.news-arrow { color: var(--primary); font-size: 14px; transition: transform 0.25s; }
.news-card:hover .news-arrow { transform: translateX(4px); }
.news-empty {
    grid-column: 1 / -1; text-align: center; padding: 48px 20px;
    display: flex; flex-direction: column; align-items: center; gap: 14px;
}
.news-empty-icon {
    width: 48px; height: 48px; border-radius: 50%;
    background: #F0F6FA; color: var(--text-secondary);
    display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.news-empty p { font-size: 16px; color: var(--text-secondary); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 900px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); padding: 0; }
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-left-bar { width: 4px; border-radius: 4px; background: #E5EBF0; transition: background 0.3s; height: 100%; }
.faq-item.active .faq-left-bar { background: var(--primary); }
.faq-question {
    display: flex; align-items: center; justify-content: space-between;
    gap: 16px; padding: 20px 4px; cursor: pointer;
}
.faq-question-text { font-size: 17px; font-weight: 600; color: var(--text); display: flex; align-items: center; gap: 16px; flex: 1; }
.faq-question-text .faq-left-bar { flex-shrink: 0; }
.faq-icon {
    width: 28px; height: 28px; border-radius: 50%;
    background: rgba(43,127,163,0.08); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; transition: all 0.25s ease; flex-shrink: 0;
}
.faq-item.active .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-answer {
    max-height: 0; overflow: hidden; transition: max-height 0.3s ease;
    padding: 0 4px 0 40px; font-size: 15px; color: var(--text-secondary); line-height: 1.7;
}

/* ---------- CTA Contact ---------- */
.cta-section { padding-bottom: 90px; }
.cta-panel {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 20px; padding: 48px;
    display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
    align-items: center;
}
.cta-left { color: #fff; }
.cta-left h3 { font-size: 28px; font-weight: 700; margin-bottom: 12px; line-height: 1.3; }
.cta-left p { font-size: 16px; opacity: 0.8; line-height: 1.7; max-width: 420px; }
.cta-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: flex; gap: 12px; }
.form-group { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 14px; font-weight: 600; color: rgba(255,255,255,0.9); }
.form-group input {
    background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.3);
    border-radius: 8px; padding: 12px 14px; color: #fff; font-size: 14px;
    transition: all 0.25s; outline: none;
}
.form-group input::placeholder { color: rgba(255,255,255,0.5); }
.form-group input:focus { border-color: #fff; box-shadow: 0 0 0 3px rgba(255,255,255,0.15); }
.btn-cta-submit {
    background: var(--accent); color: #fff; font-size: 15px; font-weight: 600;
    padding: 12px 28px; border-radius: 8px; width: 200px;
    transition: all 0.25s; border: none; cursor: pointer;
}
.btn-cta-submit:hover { background: var(--accent-hover); transform: translateY(1px); box-shadow: 0 8px 20px rgba(0,0,0,0.15); }

/* ---------- Footer ---------- */
.site-footer { background: #102A33; color: rgba(255,255,255,0.9); padding-top: 60px; padding-bottom: 32px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.footer-brand .logo-text-cn { color: #fff; }
.footer-brand .logo-text-en { color: #9AB3BC; }
.footer-desc { font-size: 13px; color: #9AB3BC; margin-top: 14px; line-height: 1.7; max-width: 260px; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: #9AB3BC; font-size: 14px; }
.footer-col ul li a:hover { color: #fff; }
.footer-contact-list li { display: flex; gap: 10px; align-items: flex-start; color: #9AB3BC; font-size: 14px; }
.footer-contact-list li i { margin-top: 4px; color: var(--primary); width: 16px; text-align: center; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px; display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 12px;
}
.footer-copy { font-size: 13px; color: #9AB3BC; }
.footer-icp { font-size: 13px; color: #6E8A94; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

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

/* ---------- Responsive ---------- */
@media (max-width: 1023px) {
    .section-block { padding: 56px 0; }
    .hero-inner { grid-template-columns: 1fr; padding-top: 48px; padding-bottom: 48px; }
    .hero-title { font-size: 36px; }
    .hero-visual { margin-top: 24px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-cell + .stat-cell::before { display: none; }
    .stat-cell { padding: 32px 16px; }
    .services-grid { grid-template-columns: 1fr; }
    .solutions-grid { grid-template-columns: 1fr; }
    .case-row { grid-template-columns: 1fr; gap: 24px; }
    .case-row.reverse .case-image { order: 1; }
    .case-row.reverse .case-content { order: 2; }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .cta-panel { grid-template-columns: 1fr; padding: 32px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .main-nav { display: none; }
    .nav-toggle { display: block; }
    .nav-search { display: none; }
    .btn-nav-cta { display: none; }
    .cta-form { width: 100%; }
    .btn-cta-submit { width: 100%; }
}
@media (max-width: 767px) {
    .section-block { padding: 48px 0; }
    .hero-title { font-size: 32px; }
    .hero-actions { flex-direction: column; }
    .btn-primary, .btn-outline { width: 100%; justify-content: center; }
    .hero-img-wrap img { height: 260px; }
    .services-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .stat-number { font-size: 40px; }
    .form-row { flex-direction: column; }
    .cta-panel { padding: 24px; }
    .cta-left h3 { font-size: 24px; }
    .footer-grid { grid-template-columns: 1fr; }
    .container-page { padding-left: 20px; padding-right: 20px; }
    .news-head { flex-direction: column; align-items: flex-start; gap: 8px; }
    .faq-question-text { font-size: 15px; }
    .solution-banner { padding: 28px; }
    .service-banner { padding: 24px; flex-direction: column; }
    .service-banner .btn-banner { width: 100%; justify-content: center; }
    .section-title { font-size: 26px; }
}
@media (min-width: 768px) and (max-width: 1023px) {
    .news-grid { grid-template-columns: repeat(2, 1fr); }
}

/* roulang page: category1 */
:root {
            --primary: #2B7FA3;
            --primary-dark: #1F5F7A;
            --accent: #F26531;
            --accent-hover: #F27647;
            --support: #10A87A;
            --bg: #F7F9FB;
            --card: #FFFFFF;
            --text: #1A2B3C;
            --text-secondary: #5A6B7C;
            --border: #E5EBF0;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-tag: 999px;
            --shadow-card: 0 8px 24px rgba(26, 43, 60, 0.08);
            --shadow-card-hover: 0 12px 32px rgba(26, 43, 60, 0.12);
            --container-w: 1200px;
            --space-section: 90px;
            --font-body: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "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-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
        }
        .container-page {
            max-width: var(--container-w);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header ===== */
        .site-header {
            position: relative;
            z-index: 50;
            height: 64px;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 6px rgba(26, 43, 60, 0.04);
        }
        .nav-wrap {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        .logo-block {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            border-radius: 9px;
            letter-spacing: 0;
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.1;
        }
        .logo-text-cn {
            font-size: 17px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
        }
        .logo-text-en {
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--text-secondary);
            text-transform: uppercase;
            margin-top: 2px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 30px;
            margin-left: auto;
        }
        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            padding: 20px 0 18px;
            position: relative;
            transition: color 0.2s ease;
            white-space: nowrap;
        }
        .main-nav a::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 3px;
            border-radius: 3px 3px 0 0;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.25s ease;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--primary);
        }
        .main-nav a.active::after {
            transform: scaleX(1);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .nav-search {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            color: var(--text-secondary);
            transition: background 0.2s ease, color 0.2s ease;
        }
        .nav-search:hover {
            background: #F0F6FA;
            color: var(--primary);
        }
        .btn-nav-cta {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: 8px;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
            box-shadow: 0 4px 12px rgba(242, 101, 49, 0.25);
        }
        .btn-nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(242, 101, 49, 0.32);
        }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            border: 1px solid var(--border);
            color: var(--text);
            font-size: 18px;
            transition: background 0.2s ease;
        }
        .nav-toggle:hover {
            background: #F0F6FA;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #102A33;
            color: #fff;
            padding: 64px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand .logo-block {
            margin-bottom: 14px;
        }
        .footer-brand .logo-mark {
            background: rgba(255, 255, 255, 0.16);
        }
        .footer-brand .logo-text-cn {
            color: #fff;
        }
        .footer-brand .logo-text-en {
            color: #9AB3BC;
        }
        .footer-desc {
            font-size: 13px;
            line-height: 1.7;
            color: #9AB3BC;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            font-size: 14px;
            color: #9AB3BC;
            transition: color 0.2s ease;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: #9AB3BC;
        }
        .footer-contact-list i {
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: #9AB3BC;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-copy {
            color: #9AB3BC;
        }
        .footer-icp {
            color: #9AB3BC;
            opacity: 0.8;
        }

        /* ===== 通用按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 8px;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
            box-shadow: 0 4px 14px rgba(242, 101, 49, 0.28);
            border: none;
            cursor: pointer;
            line-height: 1.2;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(1px);
            box-shadow: 0 6px 20px rgba(242, 101, 49, 0.34);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 8px;
            border: 1px solid var(--primary);
            transition: background 0.2s ease, transform 0.2s ease;
            line-height: 1.2;
        }
        .btn-outline:hover {
            background: #F0F6FA;
            transform: translateY(1px);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== 分类页通用 ===== */
        .page-cat-1 .cat-section {
            padding: var(--space-section) 0;
        }
        .cat-section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .cat-section-head h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 12px;
            color: var(--text);
        }
        .cat-section-head p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
        }
        .cat-kicker {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 1px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .cat-kicker i {
            font-size: 13px;
        }

        /* ---- Hero ---- */
        .cat-hero {
            background: linear-gradient(135deg, #F7F9FB 0%, #EDF3F6 100%);
            border-bottom: 1px solid var(--border);
            padding: 64px 0 56px;
            position: relative;
            overflow: hidden;
        }
        .cat-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 0l26 15v30L30 60 4 45V15z' fill='%232B7FA3' fill-opacity='0.04'/%3E%3C/svg%3E");
            background-size: 60px 60px;
            pointer-events: none;
        }
        .cat-hero-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 48px;
            min-height: 300px;
        }
        .cat-hero-content {
            flex: 1 1 55%;
        }
        .cat-hero-content h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .cat-hero-desc {
            font-size: 18px;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 460px;
            margin-bottom: 28px;
        }
        .cat-hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }
        .cat-hero-trust {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }
        .cat-hero-trust span {
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .cat-hero-trust i {
            color: var(--support);
            font-size: 14px;
        }
        .cat-hero-figure {
            flex: 1 1 45%;
            position: relative;
        }
        .cat-hero-figure img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            animation: floaty 3s ease-in-out infinite alternate;
        }
        .cat-hero-float-card {
            position: absolute;
            left: -18px;
            bottom: -20px;
            background: #fff;
            border-radius: 12px;
            box-shadow: var(--shadow-card);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .cat-hero-float-card .float-num {
            font-size: 26px;
            font-weight: 800;
            color: var(--accent);
        }
        .cat-hero-float-card .float-label {
            font-size: 13px;
            color: var(--text-secondary);
        }
        @keyframes floaty {
            0% {
                transform: translateY(0);
            }
            100% {
                transform: translateY(6px);
            }
        }

        /* ---- 核心卡片 ---- */
        .cat-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .cat-card {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: transform 0.25s ease, box-shadow 0.25s ease, outline 0.25s ease;
            outline: 1px solid transparent;
        }
        .cat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            outline-color: var(--primary);
        }
        .cat-card-img {
            height: 160px;
            overflow: hidden;
            background: #EDF3F6;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .cat-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .cat-card-body {
            padding: 20px 24px 24px;
        }
        .cat-card-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            color: var(--primary);
            background: #F0F6FA;
            border-radius: var(--radius-tag);
            padding: 4px 12px;
            margin-bottom: 12px;
        }
        .cat-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }
        .cat-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ---- 数据 ---- */
        .cat-stats {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 56px 0;
        }
        .cat-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            text-align: center;
        }
        .cat-stat {
            border-left: 1px solid var(--border);
            padding: 8px 16px;
        }
        .cat-stat:first-child {
            border-left: none;
        }
        .cat-stat-num {
            font-size: 56px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.2;
        }
        .cat-stat:nth-child(2) .cat-stat-num {
            color: var(--accent);
        }
        .cat-stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ---- 场景 ---- */
        .cat-scenes-inner {
            display: flex;
            align-items: center;
            gap: 56px;
        }
        .cat-scenes-figure {
            flex: 1 1 48%;
        }
        .cat-scenes-figure img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            border-radius: 14px;
            box-shadow: var(--shadow-card);
        }
        .cat-scenes-content {
            flex: 1 1 52%;
        }
        .cat-scenes-content h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 24px;
        }
        .cat-scene-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .cat-scene-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            font-size: 15px;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border);
        }
        .cat-scene-list li:last-child {
            border-bottom: none;
        }
        .scene-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
            margin-top: 8px;
        }
        .cat-scene-list strong {
            color: var(--text);
            margin-right: 4px;
            font-weight: 600;
            min-width: 32px;
        }

        /* ---- 流程 ---- */
        .cat-process-section {
            background: var(--bg);
        }
        .cat-process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .cat-process-step {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 24px;
            text-align: left;
            position: relative;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .cat-process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .step-num {
            font-size: 36px;
            font-weight: 800;
            color: rgba(43, 127, 163, 0.18);
            line-height: 1;
            display: block;
            margin-bottom: 16px;
        }
        .cat-process-step h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }
        .cat-process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ---- FAQ ---- */
        .cat-faq-section {
            background: #fff;
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 16px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            background: transparent;
            text-align: left;
            border-left: 4px solid #E5EBF0;
            transition: border-color 0.25s ease, background 0.25s ease;
            line-height: 1.4;
        }
        .faq-question:hover {
            background: #FAFCFD;
        }
        .faq-item.active .faq-question {
            border-left-color: var(--primary);
        }
        .faq-icon {
            font-size: 16px;
            color: var(--text-secondary);
            transition: transform 0.25s ease;
            flex-shrink: 0;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 24px 0 20px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
            border-left: 4px solid transparent;
        }
        .faq-item.active .faq-answer {
            max-height: 500px;
            padding-bottom: 20px;
            border-left-color: transparent;
        }

        /* ---- CTA ---- */
        .cat-cta-section {
            padding-top: 0;
        }
        .cat-cta-panel {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: 20px;
            padding: 48px;
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }
        .cta-content {
            flex: 1 1 40%;
            color: #fff;
        }
        .cta-content h2 {
            font-size: 28px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
        }
        .cta-form {
            flex: 1 1 50%;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .cta-form-row {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: flex-end;
        }
        .form-field {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1 1 150px;
        }
        .form-field label {
            font-size: 14px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.85);
        }
        .form-field input {
            padding: 12px 14px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            font-size: 14px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
            width: 100%;
        }
        .form-field input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .form-field input:focus {
            outline: none;
            border-color: #fff;
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
        }
        .cta-form .btn-primary {
            width: 200px;
            justify-content: center;
            border-radius: 8px;
            box-shadow: none;
        }
        .back-home {
            text-align: center;
            margin-top: 40px;
        }
        .back-home a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            transition: gap 0.2s ease;
        }
        .back-home a:hover {
            gap: 12px;
        }

        /* ---- 响应式 ---- */
        @media (max-width: 1023px) {
            .main-nav {
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cat-cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .cat-process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cat-stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .cat-stat:nth-child(3) {
                border-left: none;
            }
            .cat-hero-inner {
                flex-direction: column;
                gap: 40px;
            }
            .cat-hero-content,
            .cat-hero-figure {
                flex: 1 1 100%;
                width: 100%;
            }
            .cat-hero-figure img {
                height: 280px;
            }
            .cat-scenes-inner {
                flex-direction: column;
                gap: 36px;
            }
            .cat-scenes-figure,
            .cat-scenes-content {
                flex: 1 1 100%;
                width: 100%;
            }
            .cat-scenes-figure img {
                height: 280px;
            }
            .cat-cta-panel {
                padding: 36px;
                gap: 28px;
            }
            .cta-form-row {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-form .btn-primary {
                width: 100%;
            }
        }
        @media (max-width: 767px) {
            .site-header {
                height: auto;
                min-height: 64px;
            }
            .nav-wrap {
                flex-wrap: wrap;
                height: auto;
                padding-top: 10px;
                padding-bottom: 10px;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 12px 0 8px;
                background: #fff;
            }
            .main-nav.nav-open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 0;
                width: 100%;
                border-bottom: 1px solid var(--border);
                font-size: 15px;
            }
            .main-nav a::after {
                display: none;
            }
            .nav-right {
                margin-left: auto;
            }
            .btn-nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            :root {
                --space-section: 56px;
            }
            .cat-hero {
                padding: 40px 0 48px;
            }
            .cat-hero-content h1 {
                font-size: 32px;
            }
            .cat-hero-desc {
                font-size: 16px;
            }
            .cat-hero-figure img {
                height: 220px;
            }
            .cat-hero-float-card {
                left: 8px;
                bottom: -16px;
                padding: 10px 14px;
            }
            .cat-hero-float-card .float-num {
                font-size: 20px;
            }
            .cat-section-head h2 {
                font-size: 26px;
            }
            .cat-cards-grid {
                grid-template-columns: 1fr;
            }
            .cat-stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cat-process-grid {
                grid-template-columns: 1fr;
            }
            .cat-scenes-content h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
            .cat-cta-panel {
                padding: 28px 20px;
                flex-direction: column;
                align-items: stretch;
                text-align: left;
            }
            .cta-content h2 {
                font-size: 24px;
            }
            .cta-content p {
                font-size: 15px;
            }
        }

/* roulang page: article */
:root {
            --primary: #2B7FA3;
            --primary-dark: #1F5F7A;
            --accent: #F26531;
            --accent-hover: #F27647;
            --support: #10A87A;
            --bg: #F7F9FB;
            --card: #FFFFFF;
            --text: #1A2B3C;
            --text-secondary: #5A6B7C;
            --border: #E5EBF0;
            --shadow-card: 0 8px 24px rgba(26, 43, 60, 0.08);
            --shadow-card-hover: 0 12px 32px rgba(26, 43, 60, 0.12);
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-tag: 999px;
            --container: 1200px;
            --transition: .25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

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

        .section-gap {
            padding: 90px 0;
        }

        .site-header {
            height: 64px;
            background: var(--card);
            border-bottom: 1px solid var(--border);
            position: relative;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(26, 43, 60, 0.04);
        }

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

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

        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(43, 127, 163, 0.3);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.1;
        }

        .logo-text-cn {
            font-size: 17px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
        }

        .logo-text-en {
            font-size: 11px;
            color: var(--text-secondary);
            letter-spacing: 2px;
            text-transform: uppercase;
            font-weight: 500;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 30px;
        }

        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            padding: 6px 2px;
            position: relative;
            white-space: nowrap;
        }

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

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

        .main-nav a:hover::after {
            transform: scaleX(0.35);
        }

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

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

        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .nav-search {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            cursor: pointer;
            transition: background var(--transition), color var(--transition);
        }

        .nav-search:hover {
            background: rgba(43, 127, 163, 0.1);
            color: var(--primary);
        }

        .btn-nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 14px rgba(242, 101, 49, 0.25);
            white-space: nowrap;
        }

        .btn-nav-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(1px);
            box-shadow: 0 6px 18px rgba(242, 101, 49, 0.3);
        }

        .nav-toggle {
            display: none;
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--bg);
            color: var(--text);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(43, 127, 163, 0.1);
        }

        .article-main {
            padding: 40px 0 90px;
            background: var(--bg);
            min-height: 70vh;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            padding: 14px 18px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 10px;
            margin-bottom: 32px;
        }

        .breadcrumb a {
            color: var(--primary);
            font-weight: 500;
        }

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

        .breadcrumb .sep {
            color: var(--border);
            font-weight: 300;
        }

        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
            max-width: 320px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-header {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 44px 48px 32px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-card);
        }

        .article-header h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            letter-spacing: -0.01em;
            margin-bottom: 18px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }

        .article-meta .meta-date,
        .article-meta .meta-category {
            font-size: 13px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-category {
            background: rgba(43, 127, 163, 0.1);
            color: var(--primary);
            padding: 3px 12px;
            border-radius: var(--radius-tag);
            font-weight: 600;
            font-size: 12px;
        }

        .article-layout {
            display: flex;
            gap: 32px;
            align-items: flex-start;
        }

        .article-body {
            flex: 0 0 72%;
            max-width: 72%;
        }

        .article-prose {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 48px;
            box-shadow: var(--shadow-card);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            word-break: break-word;
        }

        .article-prose > * + * {
            margin-top: 20px;
        }

        .article-prose h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.4;
            margin-top: 36px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
            color: var(--text);
        }

        .article-prose h3 {
            font-size: 20px;
            font-weight: 600;
            margin-top: 28px;
            color: var(--text);
        }

        .article-prose h4 {
            font-size: 17px;
            font-weight: 600;
            margin-top: 20px;
        }

        .article-prose p {
            margin: 20px 0;
            color: var(--text);
        }

        .article-prose a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

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

        .article-prose blockquote {
            border-left: 4px solid var(--primary);
            background: #F7F9FB;
            padding: 16px 24px;
            border-radius: 0 10px 10px 0;
            margin: 24px 0;
            color: var(--text-secondary);
            font-style: normal;
        }

        .article-prose blockquote p {
            margin: 0;
        }

        .article-prose img {
            max-width: 100%;
            border-radius: 12px;
            margin: 28px 0;
            box-shadow: var(--shadow-card);
        }

        .article-prose ul,
        .article-prose ol {
            margin: 20px 0;
            padding-left: 24px;
        }

        .article-prose ul {
            list-style: disc;
        }

        .article-prose ol {
            list-style: decimal;
        }

        .article-prose li {
            margin: 8px 0;
            padding-left: 4px;
        }

        .article-prose code {
            background: #F0F6FA;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 14px;
            color: var(--primary-dark);
        }

        .article-prose pre {
            background: #102A33;
            color: #E8F0F3;
            padding: 24px;
            border-radius: 12px;
            overflow-x: auto;
            font-size: 14px;
            line-height: 1.7;
            margin: 24px 0;
        }

        .article-prose pre code {
            background: transparent;
            padding: 0;
            color: inherit;
            font-size: inherit;
        }

        .article-prose table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }

        .article-prose th,
        .article-prose td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-prose th {
            background: var(--bg);
            font-weight: 600;
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 32px;
            transition: gap var(--transition);
        }

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

        .article-sidebar {
            flex: 0 0 28%;
            max-width: 28%;
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 88px;
        }

        .sidebar-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px;
            box-shadow: var(--shadow-card);
        }

        .sidebar-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text);
            position: relative;
            padding-bottom: 12px;
        }

        .sidebar-card h3::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 32px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .sidebar-articles li {
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
        }

        .sidebar-articles li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .sidebar-articles li:first-child {
            padding-top: 0;
        }

        .sidebar-articles a {
            display: block;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            transition: color var(--transition);
        }

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

        .sidebar-articles .sidebar-article-date {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
            display: block;
        }

        .sidebar-feature {
            padding: 0;
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .sidebar-feature img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
        }

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

        .feature-content h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .feature-content p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
        }

        .feature-content a {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
        }

        .feature-content a:hover {
            color: var(--accent-hover);
        }

        .recommend-section {
            margin-top: 56px;
        }

        .recommend-section .section-title {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 24px;
            position: relative;
            padding-bottom: 12px;
        }

        .recommend-section .section-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .recommend-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition), box-shadow var(--transition), outline var(--transition);
            height: 100%;
        }

        .recommend-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            outline: 1px solid var(--primary);
        }

        .recommend-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 10px;
            transition: color var(--transition);
        }

        .recommend-card:hover h3 {
            color: var(--primary);
        }

        .recommend-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            flex-grow: 1;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }

        .card-link:hover {
            gap: 10px;
        }

        .not-found {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 80px 40px;
            text-align: center;
            box-shadow: var(--shadow-card);
            margin-top: 24px;
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            color: var(--primary);
            font-size: 28px;
        }

        .not-found h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .not-found p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 30px;
            border-radius: var(--radius-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 16px rgba(242, 101, 49, 0.25);
            border: none;
            cursor: pointer;
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(1px);
            box-shadow: 0 8px 22px rgba(242, 101, 49, 0.3);
        }

        .btn-accent:focus-visible,
        .btn-nav-cta:focus-visible,
        .nav-toggle:focus-visible,
        .nav-search:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .site-footer {
            background: #102A33;
            color: #fff;
            padding: 70px 0 0;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 50px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

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

        .footer-brand .logo-text-en {
            color: #9AB3BC;
        }

        .footer-brand .logo-mark {
            background: var(--accent);
            box-shadow: 0 4px 14px rgba(242, 101, 49, 0.35);
        }

        .footer-desc {
            font-size: 13px;
            color: #9AB3BC;
            line-height: 1.7;
            margin-top: 16px;
            max-width: 280px;
        }

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

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

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

        .footer-col ul li a {
            color: #9AB3BC;
            font-size: 14px;
            transition: color var(--transition), padding-left var(--transition);
        }

        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #9AB3BC;
            font-size: 14px;
            margin-bottom: 12px;
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            padding: 22px 0 30px;
        }

        .footer-copy,
        .footer-icp {
            font-size: 13px;
            color: #9AB3BC;
        }

        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

            .article-layout {
                flex-direction: column;
            }

            .article-body {
                flex: 0 0 100%;
                max-width: 100%;
            }

            .article-sidebar {
                flex: 0 0 100%;
                max-width: 100%;
                position: static;
                flex-direction: row;
                align-items: stretch;
            }

            .sidebar-card {
                flex: 1;
            }
        }

        @media (max-width: 767px) {
            .section-gap {
                padding: 56px 0;
            }

            .nav-wrap {
                gap: 12px;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                bottom: 0;
                background: var(--card);
                flex-direction: column;
                align-items: flex-start;
                padding: 40px 32px;
                gap: 8px;
                display: none;
                z-index: 999;
                box-shadow: 0 12px 32px rgba(26, 43, 60, 0.12);
                overflow-y: auto;
            }

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

            .main-nav a {
                font-size: 18px;
                padding: 12px 0;
                width: 100%;
                border-bottom: 1px solid var(--border);
            }

            .main-nav a::after {
                display: none;
            }

            .nav-search,
            .btn-nav-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .article-header {
                padding: 32px 24px 24px;
            }

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

            .article-prose {
                padding: 28px 20px;
            }

            .article-prose h2 {
                font-size: 22px;
            }

            .article-sidebar {
                flex-direction: column;
            }

            .breadcrumb .current {
                max-width: 160px;
            }

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

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .container-page {
                padding: 0 16px;
            }

            .logo-text-en {
                display: none;
            }

            .article-meta {
                gap: 12px;
            }

            .recommend-section .section-title {
                font-size: 20px;
            }

            .recommend-card {
                padding: 22px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                transition: none !important;
                animation: none !important;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2B7FA3;
            --primary-dark: #1F5F7A;
            --accent: #F26531;
            --support: #10A87A;
            --bg: #F7F9FB;
            --card: #FFFFFF;
            --text: #1A2B3C;
            --text-secondary: #5A6B7C;
            --border: #E5EBF0;
            --footer-bg: #102A33;
            --footer-text: #9AB3BC;
            --radius-card: 14px;
            --radius-btn: 8px;
            --shadow-card: 0 8px 24px rgba(26, 43, 60, 0.08);
            --shadow-hover: 0 12px 32px rgba(26, 43, 60, 0.12);
            --section-gap: 90px;
        }

        /* ===== base reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
        }

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

        h1,
        h2,
        h3,
        h4,
        p {
            margin: 0;
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== container ===== */
        .container-page {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-pad {
            padding-top: var(--section-gap);
            padding-bottom: var(--section-gap);
        }

        /* ===== header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 64px;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 0 rgba(229, 235, 240, 0.6);
        }

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

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

        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            letter-spacing: 0;
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.1;
        }

        .logo-text-cn {
            font-size: 17px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
        }

        .logo-text-en {
            font-size: 11px;
            font-weight: 500;
            letter-spacing: 2px;
            color: var(--text-secondary);
            text-transform: uppercase;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            margin: 0 auto;
        }

        .main-nav a {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            padding: 8px 0;
            transition: color 0.2s;
        }

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

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

        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 3px;
            border-radius: 2px 2px 0 0;
            background: var(--primary);
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .nav-search {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 14px;
            transition: background 0.2s, color 0.2s;
        }

        .nav-search:hover {
            background: var(--bg);
            color: var(--primary);
        }

        .btn-nav-cta {
            background: var(--accent);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
        }

        .btn-nav-cta:hover {
            background: #F27647;
            transform: translateY(1px);
            box-shadow: 0 8px 20px rgba(242, 101, 49, 0.28);
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--text);
            transition: background 0.2s;
        }

        .nav-toggle:hover {
            background: var(--bg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            z-index: 99;
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 24px;
            box-shadow: 0 16px 32px rgba(26, 43, 60, 0.1);
        }

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

        .mobile-menu nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu nav a {
            display: block;
            padding: 12px 8px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            transition: background 0.2s;
        }

        .mobile-menu nav a:hover {
            background: var(--bg);
            color: var(--primary);
        }

        .mobile-menu nav a.active {
            color: var(--primary);
            font-weight: 700;
            background: #F0F6FA;
        }

        .mobile-menu .btn {
            margin-top: 12px;
            width: 100%;
            justify-content: center;
        }

        /* ===== buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: background 0.2s, color 0.2s, transform 0.2s, box-shadow 0.2s, border-color 0.2s;
            border: 1px solid transparent;
            line-height: 1.2;
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        .btn-accent:hover {
            background: #F27647;
            transform: translateY(1px);
            box-shadow: 0 10px 24px rgba(242, 101, 49, 0.3);
        }

        .btn-outline {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: #F0F6FA;
            transform: translateY(1px);
            box-shadow: 0 6px 16px rgba(43, 127, 163, 0.16);
        }

        .btn-block {
            width: 100%;
        }

        /* ===== kicker / section-head ===== */
        .kicker {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 1px;
            margin-bottom: 10px;
            text-transform: uppercase;
        }

        .section-head h2,
        .section-head .h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
        }

        .section-desc {
            margin-top: 14px;
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }

        .section-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            transition: gap 0.2s;
            white-space: nowrap;
        }

        .section-link:hover {
            gap: 10px;
        }

        /* ===== hero ===== */
        .community-hero {
            position: relative;
            padding-top: 70px;
            padding-bottom: 70px;
            background: linear-gradient(135deg, #F7F9FB 0%, #EDF3F6 100%);
            overflow: hidden;
        }

        .community-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url("data:image/svg+xml,%3Csvg width='80' height='80' viewBox='0 0 80 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M40 0L80 40L40 80L0 40Z' fill='%232B7FA3' fill-opacity='0.05'/%3E%3C/svg%3E");
            background-size: 80px 80px;
            pointer-events: none;
        }

        .hero-visual {
            position: relative;
            z-index: 2;
        }

        .hero-img-wrap {
            position: relative;
            background: #EDF3F6;
            box-shadow: var(--shadow-card);
        }

        .hero-img-wrap img {
            width: 100%;
            height: 440px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .hero-img-wrap:hover img {
            transform: scale(1.02);
        }

        .hero-img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(26, 43, 60, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero-float-card {
            position: absolute;
            left: 24px;
            bottom: 24px;
            width: 200px;
            height: 100px;
            background: #fff;
            border-radius: 14px;
            box-shadow: var(--shadow-card);
            padding: 18px 20px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            z-index: 3;
            animation: floatY 3s ease-in-out infinite;
        }

        .hero-float-card .float-num {
            font-size: 26px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .hero-float-card .float-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        @keyframes floatY {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(6px);
            }
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-content h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 18px;
        }

        .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 460px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            border-top: 1px solid var(--border);
            padding-top: 22px;
        }

        .hero-trust div {
            display: flex;
            flex-direction: column;
        }

        .hero-trust strong {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
        }

        .hero-trust span {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 2px;
        }

        /* ===== feature list (镜像区) ===== */
        .community-features {
            background: #fff;
        }

        .feature-img-wrap {
            box-shadow: var(--shadow-card);
        }

        .feature-img-wrap img {
            transition: transform 0.5s;
        }

        .feature-img-wrap:hover img {
            transform: scale(1.03);
        }

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

        .feature-item {
            display: flex;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border);
        }

        .feature-item:last-child {
            border-bottom: none;
        }

        .feature-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary);
            flex-shrink: 0;
            margin-top: 10px;
        }

        .feature-item strong {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
        }

        .feature-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-top: 4px;
        }

        /* ===== service cards ===== */
        .service-section {
            background: var(--bg);
        }

        .service-card {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            display: flex;
            flex-direction: column;
            transition: transform 0.25s, box-shadow 0.25s, outline 0.25s;
            outline: 1px solid transparent;
        }

        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            outline-color: var(--primary);
        }

        .service-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: #EDF4F7;
            color: var(--primary);
            font-size: 22px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            flex-grow: 1;
            margin-bottom: 18px;
        }

        .service-card a {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s;
        }

        .service-card a:hover {
            gap: 10px;
        }

        /* ===== stats strip ===== */
        .stats-strip {
            background: #fff;
        }

        .stats-grid {
            display: grid;
            gap: 0;
        }

        .stat-item {
            padding: 24px 20px;
            text-align: center;
            border-left: 1px solid var(--border);
        }

        .stat-item:first-child {
            border-left: none;
        }

        .stat-item span {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--primary);
        }

        .stat-item.highlight span {
            color: var(--accent);
        }

        .stat-item p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== scenario cards ===== */
        .scenario-section {
            background: var(--bg);
        }

        .scenario-card {
            background: #fff;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            border-top: 3px solid transparent;
            transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
        }

        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-top-color: var(--primary);
        }

        .scenario-num {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 1px;
            margin-bottom: 14px;
        }

        .scenario-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }

        .scenario-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ===== news cards ===== */
        .news-section {
            background: #fff;
        }

        .news-card {
            background: var(--bg);
            border-radius: var(--radius-card);
            padding: 24px;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--border);
            transition: box-shadow 0.25s, outline 0.25s;
        }

        .news-card:hover {
            box-shadow: var(--shadow-hover);
            outline: 1px solid var(--primary);
        }

        .news-tag {
            display: inline-block;
            align-self: flex-start;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: #E9F1F5;
            border-radius: 999px;
            padding: 4px 12px;
            margin-bottom: 12px;
        }

        .news-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex-grow: 1;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-secondary);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }

        .news-meta a {
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s;
        }

        .news-meta a:hover {
            gap: 8px;
        }

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

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

        .faq-item {
            border-left: 4px solid var(--border);
            border-radius: 0 8px 8px 0;
            background: #fff;
            margin-bottom: 12px;
            transition: border-color 0.25s, box-shadow 0.25s;
        }

        .faq-item.active {
            border-left-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            border-radius: 0 8px 8px 0;
            transition: color 0.2s;
        }

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

        .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: #F0F4F6;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 14px;
            transition: transform 0.25s ease, background 0.25s;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

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

        .faq-item.active .faq-answer {
            max-height: 320px;
            padding-bottom: 20px;
            padding-top: 0;
        }

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

        .contact-panel {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: 20px;
            padding: 48px;
            color: #fff;
            box-shadow: 0 16px 48px rgba(31, 95, 122, 0.28);
        }

        .contact-info h2 {
            font-size: 28px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .contact-info p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 480px;
        }

        .contact-info ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .contact-info ul li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.95);
        }

        .contact-info ul li i {
            color: #fff;
            font-size: 16px;
        }

        .contact-form {
            background: #fff;
            border-radius: 14px;
            padding: 28px;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
        }

        .form-field {
            margin-bottom: 18px;
        }

        .form-field label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .form-field input {
            width: 100%;
            padding: 12px 14px;
            border: 1px solid #D6DFE5;
            border-radius: var(--radius-btn);
            font-size: 15px;
            color: var(--text);
            background: #fff;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .form-field input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(43, 127, 163, 0.18);
        }

        .form-field input::placeholder {
            color: #A6B4BE;
        }

        /* ===== info strip ===== */
        .info-strip {
            background: #F0F6FA;
            border-radius: 12px;
            padding: 24px 32px;
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 24px;
        }

        .info-strip i {
            font-size: 24px;
            color: var(--primary);
            flex-shrink: 0;
        }

        .info-strip p {
            font-size: 15px;
            color: var(--text);
            font-weight: 500;
        }

        /* ===== footer ===== */
        .site-footer {
            background: var(--footer-bg);
            color: #fff;
            padding: 64px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

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

        .footer-brand .logo-text-en {
            color: var(--footer-text);
        }

        .footer-desc {
            margin-top: 14px;
            font-size: 13px;
            color: var(--footer-text);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

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

        .footer-col ul li a {
            font-size: 14px;
            color: var(--footer-text);
            transition: color 0.2s;
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--footer-text);
            line-height: 1.6;
        }

        .footer-contact-list li i {
            width: 16px;
            color: rgba(255, 255, 255, 0.7);
            flex-shrink: 0;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            font-size: 13px;
            color: var(--footer-text);
        }

        .footer-copy {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== responsive ===== */
        @media (max-width: 1023px) {
            :root {
                --section-gap: 64px;
            }
            .main-nav {
                display: none;
            }
            .nav-search {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .hero-content h1 {
                font-size: 36px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-item:nth-child(3) {
                border-left: none;
                border-top: 1px solid var(--border);
            }
            .stat-item:nth-child(4) {
                border-top: 1px solid var(--border);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .contact-panel {
                padding: 32px;
            }
        }

        @media (max-width: 767px) {
            :root {
                --section-gap: 56px;
            }
            .container-page {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-content h1 {
                font-size: 32px;
            }
            .hero-desc {
                font-size: 16px;
            }
            .hero-img-wrap img {
                height: 280px;
            }
            .hero-float-card {
                width: 170px;
                height: 90px;
                left: 16px;
                bottom: 16px;
                padding: 14px 16px;
            }
            .hero-float-card .float-num {
                font-size: 22px;
            }
            .section-head h2,
            .section-head .h2 {
                font-size: 26px;
            }
            .stat-item span {
                font-size: 34px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .contact-panel {
                padding: 24px;
            }
            .contact-panel {
                border-radius: 14px;
            }
            .news-card {
                padding: 20px;
            }
            .info-strip {
                flex-direction: column;
                text-align: center;
                padding: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .btn {
                padding: 11px 22px;
                font-size: 14px;
            }
        }

        @media (max-width: 480px) {
            .hero-trust {
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item {
                padding: 20px 12px;
            }
        }