/* roulang page: index */
:root {
  --primary: #0E9F8D;
  --primary-dark: #0B7D6F;
  --primary-light: rgba(14, 159, 141, 0.10);
  --dark: #1F2A30;
  --dark-bg: #162124;
  --bg: #F4F7F5;
  --white: #FFFFFF;
  --border: #E5EBEA;
  --text: #2A363B;
  --text-light: #6B7A7F;
  --accent: #F5A623;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 16px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 24px rgba(0,0,0,0.10);
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "Roboto Mono", "SF Mono", Consolas, monospace;
  --transition: 0.25s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.8; font-size: 1rem; -webkit-font-smoothing: antialiased; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; }
ul, ol { list-style: none; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: var(--white); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { text-align: center; margin-bottom: 48px; max-width: 720px; margin-left: auto; margin-right: auto; }
.section-tag { display: inline-block; background: var(--primary-light); color: var(--primary); font-size: 0.8125rem; font-weight: 700; letter-spacing: 0.06em; padding: 4px 16px; border-radius: 16px; margin-bottom: 12px; }
.section-title { font-size: clamp(1.75rem, 3vw, 2.25rem); font-weight: 700; color: var(--dark); line-height: 1.4; margin-bottom: 12px; }
.section-sub { color: var(--text-light); font-size: 1rem; line-height: 1.8; }
:focus-visible { outline: 3px solid rgba(14, 159, 141, 0.4); outline-offset: 2px; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; height: 48px; padding: 0 28px; border-radius: var(--radius-btn); font-size: 0.9375rem; font-weight: 600; transition: all var(--transition); white-space: nowrap; cursor: pointer; border: 1px solid transparent; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(14,159,141,0.25); }
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.btn-outline { border: 1px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary-light); }
.btn-outline:active { transform: translateY(0); }
.btn-sm { height: 40px; padding: 0 20px; font-size: 0.875rem; }
.btn-lg { height: 52px; padding: 0 36px; font-size: 1rem; }

/* ---------- Header / Nav ---------- */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; height: 70px; background: rgba(255,255,255,0.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark { width: 38px; height: 38px; border-radius: 10px; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.logo-mark svg { width: 22px; height: 22px; }
.logo-text { font-size: 1.25rem; font-weight: 800; color: var(--dark); letter-spacing: 0.02em; }
.main-nav { display: flex; gap: 32px; align-items: center; }
.nav-link { position: relative; padding: 8px 2px; font-size: 0.9375rem; font-weight: 500; color: var(--text); transition: color var(--transition); }
.nav-link::after { content: ""; position: absolute; left: 50%; bottom: 0; width: 0; height: 2px; background: var(--primary); transform: translateX(-50%); transition: width 0.3s ease; }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link:hover, .nav-link.active { color: var(--primary); }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.hamburger { display: none; width: 42px; height: 42px; border-radius: 8px; border: 1px solid var(--border); background: #fff; align-items: center; justify-content: center; flex-direction: column; gap: 5px; transition: all var(--transition); }
.hamburger span { display: block; width: 18px; height: 2px; background: var(--dark); border-radius: 2px; transition: all 0.3s ease; }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; background: var(--dark-bg); color: #fff; padding: 170px 0 96px; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.webp'); background-size: cover; background-position: center; opacity: 0.28; }
.hero-grid-overlay { position: absolute; inset: 0; background: linear-gradient(rgba(14,159,141,0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(14,159,141,0.06) 1px, transparent 1px); background-size: 60px 60px; opacity: 0.8; }
.hero-content { position: relative; z-index: 2; max-width: 760px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15); border-radius: 20px; padding: 6px 18px; font-size: 0.8125rem; color: rgba(255,255,255,0.85); margin-bottom: 24px; }
.hero-badge svg { width: 16px; height: 16px; color: var(--primary); }
.hero h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.25; margin-bottom: 24px; color: #fff; letter-spacing: -0.01em; }
.hero h1 .highlight { color: var(--primary); }
.hero-sub { font-size: 1.0625rem; color: rgba(255,255,255,0.82); margin-bottom: 40px; max-width: 640px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.hero .btn-outline { border-color: rgba(255,255,255,0.5); color: #fff; }
.hero .btn-outline:hover { background: rgba(255,255,255,0.10); }
.hero-stats { position: relative; z-index: 2; display: flex; gap: 48px; margin-top: 72px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.12); }
.hero-stat .hero-stat-num { font-size: 1.75rem; font-weight: 800; color: #fff; font-family: var(--mono); }
.hero-stat .hero-stat-label { font-size: 0.8125rem; color: rgba(255,255,255,0.6); margin-top: 4px; }

/* ---------- Stats Bar ---------- */
.stats-bar { background: var(--white); border-bottom: 1px solid var(--border); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; padding: 40px 0; }
.stat-item { text-align: center; padding: 0 16px; }
.stat-num { font-size: 2.2rem; font-weight: 800; color: var(--primary); font-family: var(--mono); line-height: 1.2; }
.stat-label { font-size: 0.875rem; color: var(--text-light); margin-top: 6px; }
.stat-item + .stat-item { border-left: 1px solid var(--border); }

/* ---------- Product Grid ---------- */
.product-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.product-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-sm); transition: all var(--transition); display: flex; flex-direction: column; }
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.product-banner { aspect-ratio: 16/9; overflow: hidden; background: var(--bg); }
.product-banner img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.product-card:hover .product-banner img { transform: scale(1.03); }
.product-body { padding: 28px 28px 24px; display: flex; flex-direction: column; flex: 1; }
.product-icon { width: 44px; height: 44px; border-radius: 10px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.product-icon svg { width: 22px; height: 22px; }
.product-body h3 { font-size: 1.25rem; font-weight: 600; color: var(--dark); margin-bottom: 8px; }
.product-body > p { font-size: 0.9375rem; color: var(--text-light); line-height: 1.7; margin-bottom: 20px; flex: 1; }
.learn-more { color: var(--primary); font-size: 0.875rem; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; transition: gap var(--transition); }
.learn-more:hover { gap: 10px; }
.learn-more svg { width: 16px; height: 16px; }

/* ---------- Scenario ---------- */
.scenario-row { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; margin-bottom: 80px; }
.scenario-row:last-child { margin-bottom: 0; }
.scenario-row.reverse .scenario-media { order: 2; }
.scenario-media { border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-sm); }
.scenario-media img { width: 100%; height: 100%; aspect-ratio: 4/3; object-fit: cover; }
.scenario-body .scenario-tag { display: inline-block; background: var(--primary-light); color: var(--primary); font-size: 0.8125rem; font-weight: 700; padding: 4px 14px; border-radius: var(--radius-tag); margin-bottom: 14px; }
.scenario-body h3 { font-size: 1.375rem; font-weight: 700; color: var(--dark); margin-bottom: 16px; line-height: 1.4; }
.scenario-body p { font-size: 0.9375rem; color: var(--text-light); line-height: 1.8; }

/* ---------- Case Cards ---------- */
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.case-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-sm); transition: all var(--transition); }
.case-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.case-cover { aspect-ratio: 16/9; overflow: hidden; }
.case-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.case-card:hover .case-cover img { transform: scale(1.03); }
.case-body { padding: 28px; }
.case-body h3 { font-size: 1.125rem; font-weight: 600; color: var(--dark); margin-bottom: 10px; }
.case-body p { font-size: 0.9375rem; color: var(--text-light); line-height: 1.7; margin-bottom: 18px; }
.case-metrics { display: flex; gap: 24px; border-top: 1px solid var(--border); padding-top: 16px; }
.metric { flex: 1; }
.metric .metric-num { font-size: 1.5rem; font-weight: 800; color: var(--dark); font-family: var(--mono); }
.metric .metric-label { font-size: 0.75rem; color: var(--text-light); margin-top: 2px; }

/* ---------- Pricing ---------- */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; align-items: stretch; }
.price-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 36px 32px; position: relative; box-shadow: var(--shadow-sm); transition: all var(--transition); display: flex; flex-direction: column; }
.price-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.price-card.featured { border: 2px solid var(--primary); box-shadow: 0 4px 20px rgba(14,159,141,0.15); }
.price-badge { position: absolute; top: -14px; right: 24px; background: var(--accent); color: #fff; font-size: 0.75rem; font-weight: 700; padding: 4px 14px; border-radius: 20px; letter-spacing: 0.04em; }
.price-name { font-size: 1.125rem; font-weight: 600; color: var(--dark); margin-bottom: 8px; }
.price-amount { font-size: 2rem; font-weight: 800; color: var(--dark); font-family: var(--mono); line-height: 1.2; margin-bottom: 4px; }
.price-desc { font-size: 0.8125rem; color: var(--text-light); margin-bottom: 24px; }
.price-features { flex: 1; margin-bottom: 32px; }
.price-features li { position: relative; padding: 8px 0 8px 28px; font-size: 0.875rem; color: var(--text); border-bottom: 1px solid var(--bg); }
.price-features li:last-child { border-bottom: none; }
.price-features li::before { content: ""; position: absolute; left: 0; top: 16px; width: 18px; height: 18px; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%230E9F8D' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 10.5l4 4 8-8'/%3E%3C/svg%3E"); background-size: contain; background-repeat: no-repeat; }
.price-card .btn { width: 100%; }

/* ---------- News List ---------- */
.news-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 40px; }
.news-head .section-title { margin-bottom: 4px; }
.view-all { display: inline-flex; align-items: center; gap: 8px; color: var(--primary); font-size: 0.875rem; font-weight: 600; white-space: nowrap; padding: 8px 0; transition: gap var(--transition); }
.view-all:hover { gap: 12px; }
.view-all svg { width: 18px; height: 18px; }
.news-list { border-top: 1px solid var(--border); }
.news-row { display: grid; grid-template-columns: 140px 1fr auto; gap: 24px; align-items: center; padding: 24px 8px; border-bottom: 1px solid var(--border); transition: background var(--transition); }
.news-row:hover { background: var(--white); }
.news-date { font-size: 0.875rem; color: var(--text-light); font-family: var(--mono); }
.news-content h3 { font-size: 1.125rem; font-weight: 600; color: var(--dark); margin-bottom: 4px; transition: color var(--transition); }
.news-row:hover .news-content h3 { color: var(--primary); }
.news-content p { font-size: 0.875rem; color: var(--text-light); line-height: 1.6; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.news-tag { display: inline-block; background: var(--bg); border: 1px solid var(--border); color: var(--text-light); font-size: 0.8125rem; font-weight: 600; padding: 4px 16px; border-radius: 16px; white-space: nowrap; }
.news-empty { border: 2px dashed var(--border); border-radius: var(--radius-card); padding: 60px 24px; text-align: center; color: var(--text-light); font-size: 0.9375rem; }

/* ---------- FAQ ---------- */
.faq-grid { max-width: 820px; margin: 0 auto; }
.faq-item { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-card); margin-bottom: 16px; overflow: hidden; transition: all var(--transition); }
.faq-item.active { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.faq-question { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 22px 28px; text-align: left; font-size: 1rem; font-weight: 600; color: var(--dark); background: transparent; transition: color var(--transition); }
.faq-item.active .faq-question { color: var(--primary); }
.faq-icon { position: relative; width: 20px; height: 20px; flex-shrink: 0; }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); background: var(--text-light); width: 16px; height: 2px; border-radius: 2px; transition: all 0.3s ease; }
.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item.active .faq-icon::before { background: var(--primary); }
.faq-item.active .faq-icon::after { transform: translate(-50%, -50%) rotate(0deg); background: var(--primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-answer-inner { padding: 0 28px 24px; border-left: 3px solid var(--primary); margin-left: 28px; color: var(--text-light); font-size: 0.9375rem; line-height: 1.8; }

/* ---------- CTA ---------- */
.cta-section { position: relative; background: var(--dark-bg); color: #fff; overflow: hidden; }
.cta-section::before { content: ""; position: absolute; inset: 0; background: linear-gradient(rgba(14,159,141,0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(14,159,141,0.08) 1px, transparent 1px); background-size: 48px 48px; }
.cta-inner { position: relative; z-index: 2; text-align: center; padding: 80px 0; max-width: 640px; margin: 0 auto; }
.cta-inner h2 { font-size: clamp(1.75rem, 3vw, 2.25rem); font-weight: 700; margin-bottom: 16px; }
.cta-inner p { color: rgba(255,255,255,0.75); margin-bottom: 32px; font-size: 1rem; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-section .btn-outline { border-color: rgba(255,255,255,0.5); color: #fff; }
.cta-section .btn-outline:hover { background: rgba(255,255,255,0.1); }

/* ---------- Footer ---------- */
.site-footer { background: var(--dark); color: rgba(255,255,255,0.7); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 48px; padding: 60px 0 40px; }
.footer-brand .logo-text { color: #fff; }
.footer-about { margin-top: 16px; font-size: 0.875rem; line-height: 1.8; color: rgba(255,255,255,0.6); }
.footer-col h4 { color: #fff; font-size: 0.9375rem; font-weight: 600; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a { font-size: 0.875rem; color: rgba(255,255,255,0.6); transition: color var(--transition); }
.footer-col ul a:hover { color: var(--primary); }
.footer-contact li { display: flex; gap: 10px; font-size: 0.875rem; color: rgba(255,255,255,0.6); margin-bottom: 14px; align-items: flex-start; }
.footer-contact svg { width: 18px; height: 18px; color: var(--primary); flex-shrink: 0; margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; font-size: 0.8125rem; color: rgba(255,255,255,0.4); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .main-nav { display: none; position: absolute; top: 70px; left: 0; right: 0; background: var(--white); flex-direction: column; gap: 0; padding: 16px 24px; border-bottom: 1px solid var(--border); box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
  .main-nav.open { display: flex; }
  .main-nav .nav-link { display: block; padding: 14px 0; font-size: 1.05rem; border-bottom: 1px solid var(--bg); }
  .main-nav .nav-link:last-child { border-bottom: none; }
  .hamburger { display: flex; }
  .nav-actions .btn { display: none; }
  .hero { padding: 140px 0 72px; }
  .hero-stats { gap: 32px; flex-wrap: wrap; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stat-item + .stat-item { border-left: none; border-top: 1px solid var(--border); padding-top: 20px; }
  .scenario-row { grid-template-columns: 1fr; gap: 32px; margin-bottom: 56px; }
  .scenario-row.reverse .scenario-media { order: 0; }
  .case-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .news-row { grid-template-columns: 1fr; gap: 8px; }
  .news-tag { justify-self: start; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .hero h1 { font-size: 2rem; }
  .hero-sub { font-size: 1rem; }
  .product-grid { grid-template-columns: 1fr; }
  .product-card { max-width: 520px; margin: 0 auto; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .stat-num { font-size: 1.75rem; }
  .news-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .faq-question { padding: 18px 20px; font-size: 0.9375rem; }
  .faq-answer-inner { padding: 0 20px 20px; margin-left: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero { padding: 120px 0 56px; }
  .hero-stats { flex-direction: column; gap: 16px; margin-top: 48px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .product-body { padding: 20px; }
  .price-card { padding: 28px 20px; }
  .cta-buttons { flex-direction: column; }
  .cta-buttons .btn { width: 100%; }
}

/* roulang page: category1 */
:root {
    --primary: #0E9F8D;
    --primary-dark: #0B7F72;
    --primary-light: rgba(14, 159, 141, 0.10);
    --ink: #1F2A30;
    --ink-deep: #162124;
    --bg: #F4F7F5;
    --card: #ffffff;
    --border: #E5EBEA;
    --input-border: #D8E0DF;
    --accent: #F5A623;
    --text-body: #3A474C;
    --text-weak: #6B7A80;
    --white: #fff;
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-badge: 16px;
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 10px 24px rgba(0, 0, 0, 0.10);
    --focus-ring: 3px solid rgba(14, 159, 141, 0.4);
    --container: 1280px;
    --space-section: 80px;
    --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
    --font-mono: "Roboto Mono", Consolas, monospace;
}
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}
body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-body);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover {
    color: var(--primary-dark);
}
button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
}
input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}
ul, ol {
    list-style: none;
}
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}
.section {
    padding: var(--space-section) 0;
}
.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 48px;
}
.section-eyebrow {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.04em;
    margin-bottom: 12px;
    background: var(--primary-light);
    padding: 4px 16px;
    border-radius: var(--radius-badge);
}
.section-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 700;
    color: var(--ink);
    line-height: 1.35;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}
.section-desc {
    font-size: 1rem;
    color: var(--text-weak);
    line-height: 1.8;
}
/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 28px;
    border-radius: var(--radius-btn);
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1;
    transition: all 0.25s ease;
    border: 1px solid transparent;
    white-space: nowrap;
}
.btn:focus-visible {
    outline: var(--focus-ring);
    outline-offset: 2px;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(14, 159, 141, 0.25);
}
.btn-outline {
    border-color: var(--primary);
    color: var(--primary);
    background: transparent;
}
.btn-outline:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
}
.btn-light {
    background: #fff;
    color: var(--ink);
}
.btn-light:hover {
    background: #f0f4f2;
    color: var(--ink);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}
/* ===== Header / Nav ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 70px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 24px;
}
.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
}
.logo-mark svg {
    width: 22px;
    height: 22px;
}
.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.01em;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}
.nav-link {
    position: relative;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--ink);
    padding: 8px 2px;
    line-height: 1.2;
    transition: color 0.2s ease;
}
.nav-link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transform: translateX(-50%);
    transition: width 0.3s ease;
}
.nav-link:hover {
    color: var(--primary);
}
.nav-link:hover::after {
    width: 100%;
}
.nav-link.active {
    color: var(--primary);
    font-weight: 600;
}
.nav-link.active::after {
    width: 100%;
}
.nav-cta {
    height: 40px;
    padding: 0 22px;
    font-size: 0.875rem;
}
.nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 8px;
    align-items: center;
    justify-content: center;
    color: var(--ink);
    transition: background 0.2s ease;
}
.nav-toggle:hover {
    background: var(--bg);
}
.nav-toggle svg {
    width: 22px;
    height: 22px;
}
/* ===== Page Hero ===== */
.page-hero {
    position: relative;
    padding: 160px 0 72px;
    margin-top: 70px;
    background: linear-gradient(135deg, rgba(22, 33, 36, 0.92), rgba(22, 33, 36, 0.78)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    color: #fff;
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: 20px;
}
.breadcrumb a {
    color: rgba(255, 255, 255, 0.75);
}
.breadcrumb a:hover {
    color: #fff;
}
.breadcrumb-sep {
    opacity: 0.5;
}
.breadcrumb-current {
    color: #fff;
    font-weight: 500;
}
.page-hero h1 {
    font-size: clamp(2.25rem, 5vw, 3.25rem);
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}
.page-hero-desc {
    max-width: 680px;
    font-size: 1.0625rem;
    line-height: 1.85;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
}
.page-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}
.page-hero-shape {
    position: absolute;
    top: 0;
    right: 0;
    width: 500px;
    height: 100%;
    opacity: 0.25;
    pointer-events: none;
    background:
        radial-gradient(circle at 70% 30%, rgba(14, 159, 141, 0.6) 0, transparent 45%),
        radial-gradient(circle at 85% 70%, rgba(245, 166, 35, 0.4) 0, transparent 35%);
}
/* ===== Product Grid ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 36px;
}
.product-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: box-shadow 0.35s ease, transform 0.35s ease;
    display: flex;
    flex-direction: column;
}
.product-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-6px);
}
.product-media {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg);
}
.product-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.product-card:hover .product-media img {
    transform: scale(1.03);
}
.product-media .icon-float {
    position: absolute;
    top: 16px;
    left: 16px;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    color: var(--primary);
}
.product-media .icon-float svg {
    width: 24px;
    height: 24px;
}
.product-body {
    padding: 28px 24px 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.product-body h3 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}
.product-body p {
    font-size: 0.9375rem;
    color: var(--text-weak);
    line-height: 1.75;
    margin-bottom: 18px;
    flex: 1;
}
.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}
.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 14px;
    border-radius: var(--radius-badge);
    background: var(--bg);
    border: 1px solid var(--border);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--ink);
}
.tag-primary {
    background: var(--primary-light);
    border-color: rgba(14, 159, 141, 0.2);
    color: var(--primary-dark);
}
.product-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    transition: gap 0.25s ease, color 0.2s ease;
}
.product-link:hover {
    gap: 10px;
    color: var(--primary-dark);
}
.product-link svg {
    width: 16px;
    height: 16px;
}
/* ===== Stats Band ===== */
.stats-band {
    background: var(--ink-deep);
    color: #fff;
    padding: 64px 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
    text-align: center;
}
.stat-item .stat-num {
    font-family: var(--font-mono);
    font-size: clamp(2.25rem, 4vw, 3.25rem);
    font-weight: 700;
    color: var(--accent);
    line-height: 1.2;
    display: block;
    margin-bottom: 8px;
}
.stat-item .stat-label {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.75);
}
/* ===== Industry ===== */
.industry-section {
    background: var(--white);
}
.industry-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}
.industry-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 32px 24px;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.industry-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-6px);
    background: var(--card);
}
.industry-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    margin-bottom: 20px;
}
.industry-icon svg {
    width: 24px;
    height: 24px;
}
.industry-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
}
.industry-card p {
    font-size: 0.875rem;
    color: var(--text-weak);
    line-height: 1.7;
}
/* ===== Process ===== */
.process-section {
    position: relative;
    background: linear-gradient(135deg, rgba(22, 33, 36, 0.94), rgba(22, 33, 36, 0.86)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    color: #fff;
}
.process-section .section-title {
    color: #fff;
}
.process-section .section-desc {
    color: rgba(255, 255, 255, 0.75);
}
.process-section .section-eyebrow {
    background: rgba(14, 159, 141, 0.2);
    color: #5cd4c4;
}
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    counter-reset: step;
}
.process-step {
    position: relative;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-card);
    padding: 36px 24px 28px;
    text-align: center;
    transition: background 0.3s ease, transform 0.3s ease;
}
.process-step:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-6px);
}
.process-step .step-num {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--accent);
    background: rgba(245, 166, 35, 0.15);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    margin-bottom: 18px;
}
.process-step h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 10px;
}
.process-step p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}
/* ===== FAQ ===== */
.faq-section {
    background: var(--bg);
}
.faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.faq-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: box-shadow 0.25s ease;
}
.faq-item:hover {
    box-shadow: var(--shadow-hover);
}
.faq-item.active {
    border-color: rgba(14, 159, 141, 0.4);
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    width: 100%;
    padding: 20px 24px;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.5;
    transition: color 0.2s ease;
}
.faq-question:hover {
    color: var(--primary);
}
.faq-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ink);
    transition: background 0.3s ease, color 0.3s ease, transform 0.3s ease;
}
.faq-icon svg {
    width: 18px;
    height: 18px;
}
.faq-item.active .faq-icon {
    transform: rotate(45deg);
    background: var(--primary);
    color: #fff;
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}
.faq-answer-inner {
    padding: 0 24px 24px 24px;
    border-left: 3px solid var(--primary);
    margin-left: 24px;
    padding-left: 20px;
}
.faq-answer-inner p {
    font-size: 0.9375rem;
    color: var(--text-body);
    line-height: 1.8;
}
/* ===== CTA ===== */
.cta-section {
    background: var(--ink-deep);
    position: relative;
    overflow: hidden;
    padding: 80px 0;
}
.cta-section::before {
    content: "";
    position: absolute;
    top: -60px;
    right: -60px;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: rgba(14, 159, 141, 0.25);
    filter: blur(40px);
}
.cta-section::after {
    content: "";
    position: absolute;
    bottom: -80px;
    left: 20%;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(245, 166, 35, 0.15);
    filter: blur(30px);
}
.cta-inner {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
}
.cta-inner h2 {
    font-size: clamp(1.875rem, 3.5vw, 2.5rem);
    font-weight: 700;
    color: #fff;
    margin-bottom: 18px;
    line-height: 1.35;
}
.cta-inner p {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.8;
    margin-bottom: 36px;
}
.cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}
/* ===== Footer ===== */
.site-footer {
    background: var(--ink-deep);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-brand .logo {
    margin-bottom: 20px;
}
.footer-brand .logo-text {
    color: #fff;
}
.footer-about {
    font-size: 0.875rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
    max-width: 320px;
}
.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
}
.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.footer-col ul li a {
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.875rem;
    transition: color 0.2s ease;
}
.footer-col ul li a:hover {
    color: var(--primary);
}
.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.65);
    line-height: 1.6;
}
.footer-contact svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--primary);
    margin-top: 2px;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
.footer-bottom p {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.45);
}
.footer-bottom-links {
    display: flex;
    gap: 24px;
}
.footer-bottom-links a {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.45);
}
.footer-bottom-links a:hover {
    color: var(--primary);
}
/* ===== Responsive ===== */
@media (max-width: 1024px) {
    :root {
        --space-section: 60px;
    }
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px 24px;
        gap: 0;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.35s ease, opacity 0.35s ease, visibility 0.35s;
        box-shadow: 0 24px 40px rgba(0, 0, 0, 0.08);
    }
    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    .nav-link {
        padding: 14px 8px;
        font-size: 1.0625rem;
        border-bottom: 1px solid var(--border);
    }
    .nav-link:last-child {
        border-bottom: none;
    }
    .nav-cta {
        display: none;
    }
    .nav-toggle {
        display: inline-flex;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 36px;
    }
    .industry-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    .page-hero {
        padding: 120px 0 56px;
    }
}
@media (max-width: 520px) {
    :root {
        --space-section: 48px;
    }
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .industry-grid {
        grid-template-columns: 1fr;
    }
    .process-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .page-hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .page-hero-actions .btn {
        width: 100%;
    }
    .faq-question {
        padding: 16px 18px;
        font-size: 0.9375rem;
    }
    .product-body {
        padding: 20px;
    }
}

/* roulang page: article */
:root{
  --primary:#0E9F8D;
  --primary-dark:#0B8A7A;
  --accent:#F5A623;
  --graphite:#1F2A30;
  --ink:#162124;
  --bg:#F4F7F5;
  --white:#FFFFFF;
  --border:#E5EBEA;
  --text:#1F2A30;
  --text-light:#5A6A70;
  --radius:12px;
  --btn-radius:8px;
  --shadow:0 2px 8px rgba(0,0,0,0.05);
  --shadow-lg:0 10px 24px rgba(0,0,0,0.10);
  --font:'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
  --mono:'Roboto Mono',Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;border:none;background:none;cursor:pointer;}
input,textarea{font-family:inherit;}
.container{max-width:1280px;margin:0 auto;padding:0 24px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 28px;border-radius:var(--btn-radius);
  font-size:0.95rem;font-weight:600;letter-spacing:0.02em;
  transition:all 0.25s ease;text-decoration:none;white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;border:1px solid var(--primary);}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);box-shadow:0 6px 18px rgba(14,159,141,0.3);transform:translateY(-2px);}
.btn-secondary{background:transparent;color:var(--primary);border:1px solid var(--primary);}
.btn-secondary:hover{background:rgba(14,159,141,0.08);transform:translateY(-2px);}
.btn-accent{background:var(--accent);color:#1F2A30;border:1px solid var(--accent);font-weight:700;}
.btn-accent:hover{background:#e09200;border-color:#e09200;transform:translateY(-2px);box-shadow:0 6px 20px rgba(245,166,35,0.3);}
.btn:focus-visible,.nav-link:focus-visible,.nav-toggle:focus-visible{outline:3px solid rgba(14,159,141,0.4);outline-offset:2px;}

/* 头部导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:70px;background:rgba(255,255,255,0.92);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
  transition:box-shadow 0.3s ease;
}
.site-header.scrolled{box-shadow:0 4px 20px rgba(0,0,0,0.08);}
.header-wrap{
  max-width:1280px;margin:0 auto;padding:0 24px;
  display:flex;align-items:center;justify-content:space-between;
  height:70px;gap:24px;
}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;}
.logo-mark{
  width:38px;height:38px;border-radius:10px;
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(14,159,141,0.3);
}
.logo-mark svg{width:20px;height:20px;}
.logo-text{font-size:1.3rem;font-weight:800;color:var(--graphite);letter-spacing:-0.01em;}
.main-nav{display:flex;align-items:center;gap:32px;}
.nav-link{
  position:relative;font-size:0.95rem;font-weight:500;color:var(--graphite);
  padding:4px 0;text-decoration:none;transition:color 0.25s;
}
.nav-link::after{
  content:'';position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);
  width:0;height:2px;background:var(--primary);border-radius:2px;
  transition:width 0.3s ease;
}
.nav-link:hover,.nav-link.active{color:var(--primary);}
.nav-link:hover::after,.nav-link.active::after{width:100%;}
.nav-cta{margin-left:8px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--border);
  border-radius:8px;background:var(--white);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:border-color 0.25s;
}
.nav-toggle:hover{border-color:var(--primary);}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--graphite);border-radius:2px;transition:transform 0.3s,opacity 0.3s;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* 面包屑 */
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:0.85rem;color:rgba(255,255,255,0.65);
  margin-bottom:20px;
}
.breadcrumb a{color:rgba(255,255,255,0.75);transition:color 0.25s;}
.breadcrumb a:hover{color:var(--primary);}
.crumb-sep{color:rgba(255,255,255,0.4);}
.crumb-current{color:rgba(255,255,255,0.9);font-weight:500;max-width:320px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* 文章 Hero */
.article-hero{
  position:relative;
  background:
    linear-gradient(135deg, rgba(22,33,36,0.95) 20%, rgba(14,159,141,0.35) 80%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  padding:150px 0 64px;
  color:#fff;
  margin-top:0;
}
.article-hero .container{position:relative;z-index:1;}
.article-title-block{max-width:860px;}
.article-title-block h1{
  font-size:clamp(1.75rem,3.5vw,2.75rem);
  font-weight:800;line-height:1.35;letter-spacing:-0.01em;
  color:#fff;margin-bottom:18px;
}
.article-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:18px;
  color:rgba(255,255,255,0.75);font-size:0.85rem;
}
.meta-item{display:inline-flex;align-items:center;gap:6px;}
.meta-item svg{width:15px;height:15px;opacity:0.7;}

/* 文章正文 */
.article-main{
  background:var(--white);
  padding:56px 0 80px;
}
.article-body-wrap{
  max-width:760px;margin:0 auto;
  min-height:300px;
}
.article-body{
  font-size:1rem;line-height:1.8;color:var(--text);
  word-break:break-word;
}
.article-body h2{
  font-size:1.5rem;font-weight:700;line-height:1.5;
  margin:40px 0 16px;padding-left:14px;
  border-left:3px solid var(--primary);
}
.article-body h3{
  font-size:1.2rem;font-weight:600;line-height:1.5;
  margin:32px 0 12px;color:var(--graphite);
}
.article-body p{margin-bottom:20px;}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--primary-dark);}
.article-body img{
  max-width:100%;height:auto;border-radius:var(--radius);
  margin:24px 0;box-shadow:var(--shadow);
}
.article-body blockquote{
  border-left:3px solid var(--primary);
  background:var(--bg);
  padding:16px 24px;
  border-radius:0 8px 8px 0;
  margin:24px 0;color:var(--graphite);font-style:italic;
}
.article-body ul,.article-body ol{
  padding-left:24px;margin-bottom:20px;
}
.article-body li{margin-bottom:8px;}
.article-body pre{
  background:var(--graphite);color:#fff;
  border-radius:8px;padding:20px;overflow-x:auto;
  font-family:var(--mono);font-size:0.85rem;line-height:1.7;
  margin-bottom:24px;
}
.article-body code{
  font-family:var(--mono);background:var(--bg);
  border:1px solid var(--border);border-radius:4px;
  padding:2px 6px;font-size:0.85rem;
}
.article-body pre code{background:transparent;border:none;padding:0;color:inherit;}

/* 空状态 */
.article-empty{
  text-align:center;padding:80px 24px;max-width:640px;margin:0 auto;
}
.article-empty .empty-icon{
  width:64px;height:64px;border-radius:16px;
  background:var(--bg);border:1px dashed var(--primary);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 24px;color:var(--primary);
}
.article-empty .empty-icon svg{width:28px;height:28px;}
.article-empty h1{font-size:1.6rem;font-weight:700;margin-bottom:12px;color:var(--graphite);}
.article-empty p{color:var(--text-light);margin-bottom:28px;}

/* 相关推荐 */
.related-section{
  background:var(--bg);
  padding:72px 0;
  border-top:1px solid var(--border);
}
.section-head{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:36px;gap:16px;
}
.section-head h2{
  font-size:clamp(1.5rem,2.5vw,2rem);
  font-weight:700;color:var(--graphite);
  position:relative;
}
.section-head h2::after{
  content:'';display:block;width:48px;height:3px;
  background:var(--primary);border-radius:2px;margin-top:8px;
}
.text-link{color:var(--primary);font-weight:600;font-size:0.9rem;transition:color 0.25s;}
.text-link:hover{color:var(--primary-dark);}
.related-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.related-card{
  display:flex;flex-direction:column;
  background:var(--white);border:1px solid var(--border);
  border-radius:var(--radius);overflow:hidden;
  transition:box-shadow 0.3s ease,transform 0.3s ease;
}
.related-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px);}
.related-img{position:relative;aspect-ratio:16/9;overflow:hidden;}
.related-img img{
  width:100%;height:100%;object-fit:cover;
  transition:transform 0.4s ease;
}
.related-card:hover .related-img img{transform:scale(1.03);}
.related-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.tag{
  display:inline-flex;align-items:center;
  background:rgba(14,159,141,0.1);color:var(--primary);
  font-size:0.78rem;font-weight:600;
  padding:4px 14px;border-radius:16px;
  align-self:flex-start;
}
.related-body h3{
  font-size:1.05rem;font-weight:600;line-height:1.5;color:var(--graphite);
  transition:color 0.25s;
}
.related-card:hover .related-body h3{color:var(--primary);}
.related-body p{
  font-size:0.875rem;color:var(--text-light);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.related-footer{
  text-align:center;margin-top:40px;
}

/* CTA 条 */
.cta-bar{
  position:relative;background:var(--ink);color:#fff;
  padding:56px 0;overflow:hidden;
}
.cta-bar::before{
  content:'';position:absolute;width:400px;height:400px;border-radius:50%;
  background:rgba(14,159,141,0.15);right:-80px;top:-180px;
}
.cta-bar::after{
  content:'';position:absolute;width:220px;height:220px;
  border:2px solid rgba(14,159,141,0.3);border-radius:50%;
  left:15%;bottom:-120px;
}
.cta-inner{
  position:relative;z-index:1;
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-inner h2{
  font-size:clamp(1.5rem,2.5vw,2rem);font-weight:700;
  margin-bottom:8px;
}
.cta-inner p{color:rgba(255,255,255,0.7);font-size:0.95rem;}
.cta-bar .btn-accent{flex-shrink:0;}

/* 页脚 */
.site-footer{
  background:var(--graphite);color:rgba(255,255,255,0.75);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;padding-bottom:56px;
}
.footer-brand .logo{margin-bottom:20px;}
.footer-brand .logo-text{color:#fff;}
.footer-about{font-size:0.875rem;line-height:1.8;color:rgba(255,255,255,0.55);margin-top:16px;max-width:340px;}
.footer-col h4{
  font-size:0.95rem;font-weight:600;color:#fff;
  margin-bottom:20px;position:relative;
}
.footer-col h4::after{
  content:'';display:block;width:24px;height:2px;
  background:var(--primary);border-radius:2px;margin-top:8px;
}
.footer-col ul{list-style:none;}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{
  color:rgba(255,255,255,0.65);font-size:0.875rem;
  transition:color 0.25s,padding-left 0.25s;
}
.footer-col ul li a:hover{color:var(--primary);padding-left:4px;}
.footer-contact li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:0.85rem;color:rgba(255,255,255,0.65);
  margin-bottom:14px;line-height:1.6;
}
.footer-contact svg{width:18px;height:18px;color:var(--primary);flex-shrink:0;margin-top:3px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.08);
  padding:22px 0;display:flex;align-items:center;
  justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:0.8rem;color:rgba(255,255,255,0.4);
}

/* 响应式 */
@media (max-width:1024px){
  .nav-toggle{display:flex;}
  .main-nav{
    position:absolute;top:70px;left:0;right:0;
    background:var(--white);
    flex-direction:column;align-items:stretch;
    padding:16px 24px 24px;gap:4px;
    border-bottom:1px solid var(--border);
    box-shadow:0 20px 40px rgba(0,0,0,0.12);
    display:none;
  }
  .main-nav.open{display:flex;}
  .main-nav .nav-link{
    font-size:1rem;padding:14px 0;
    width:100%;border-bottom:1px solid var(--border);
  }
  .main-nav .nav-link:last-child{border-bottom:none;}
  .main-nav .nav-link::after{display:none;}
  .nav-cta{display:none;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  .article-hero{padding:130px 0 48px;}
  .article-main{padding:40px 0 60px;}
  .section-head{flex-direction:column;align-items:flex-start;}
  .related-grid{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{justify-content:center;text-align:center;}
}
@media (max-width:520px){
  .header-wrap{padding:0 16px;}
  .container{padding:0 16px;}
  .logo-text{font-size:1.1rem;}
  .article-meta{gap:12px;font-size:0.8rem;}
  .related-body{padding:20px;}
  .btn{padding:0 22px;}
}

/* roulang page: category2 */
:root{
  --primary:#0E9F8D;
  --primary-dark:#0B8A7A;
  --primary-light:rgba(14,159,141,0.10);
  --focus-ring:rgba(14,159,141,0.4);
  --ink:#1F2A30;
  --bg:#F4F7F5;
  --dark:#162124;
  --accent:#F5A623;
  --text:#2E3A40;
  --text-weak:#6B7B82;
  --border:#E5EBEA;
  --border-strong:#D8E0DF;
  --white:#FFFFFF;
  --radius-card:12px;
  --radius-btn:8px;
  --radius-badge:16px;
  --shadow-sm:0 2px 8px rgba(0,0,0,0.05);
  --shadow-lg:0 10px 24px rgba(0,0,0,0.10);
  --container:1280px;
  --font-stack:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Segoe UI",sans-serif;
  --mono:"Roboto Mono",SFMono-Regular,Consolas,monospace;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-stack);
  background:var(--bg);
  color:var(--text);
  line-height:1.8;
  font-size:1rem;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .25s ease;}
ul{list-style:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
input,textarea{font-family:inherit;}

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

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:48px;
  padding:0 28px;
  border-radius:var(--radius-btn);
  font-size:0.9375rem;
  font-weight:600;
  letter-spacing:0.02em;
  transition:all .25s ease;
  border:1px solid transparent;
  white-space:nowrap;
}
.btn:focus-visible{
  outline:3px solid var(--focus-ring);
  outline-offset:2px;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
}
.btn-primary:hover{
  background:var(--primary-dark);
  transform:translateY(-1px);
  box-shadow:var(--shadow-sm);
}
.btn-outline{
  background:transparent;
  color:var(--primary);
  border-color:var(--primary);
}
.btn-outline:hover{
  background:var(--primary-light);
  transform:translateY(-1px);
}
.btn-light{
  background:#fff;
  color:var(--ink);
}
.btn-light:hover{
  background:var(--bg);
  transform:translateY(-1px);
}
.btn-accent{
  background:var(--accent);
  color:var(--ink);
}
.btn-accent:hover{
  background:#E09615;
  transform:translateY(-1px);
}

/* 标签/徽章 */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:0.875rem;
  font-weight:600;
  color:var(--primary);
  text-transform:uppercase;
  letter-spacing:0.08em;
}
.tag::before{
  content:"";
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--primary);
  flex-shrink:0;
}
.badge{
  display:inline-flex;
  align-items:center;
  padding:4px 14px;
  border-radius:var(--radius-badge);
  background:var(--primary-light);
  color:var(--primary-dark);
  font-size:0.8125rem;
  font-weight:600;
}
.badge-dark{
  background:rgba(255,255,255,0.10);
  color:#B8D9D4;
}

/* 页面头部 */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  height:70px;
  background:rgba(255,255,255,0.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  height:70px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:36px;
  height:36px;
  border-radius:9px;
  background:var(--primary);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:0 4px 12px rgba(14,159,141,0.28);
}
.logo-mark svg{
  width:20px;
  height:20px;
}
.logo-text{
  font-size:1.32rem;
  font-weight:800;
  color:var(--ink);
  letter-spacing:0.01em;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:32px;
}
.nav-link{
  position:relative;
  font-size:0.9375rem;
  font-weight:600;
  color:var(--text);
  padding:8px 0;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:0;
  width:0;
  height:3px;
  border-radius:3px;
  background:var(--primary);
  transform:translateX(-50%);
  transition:width .3s ease;
}
.nav-link:hover{
  color:var(--primary);
}
.nav-link:hover::after{
  width:100%;
}
.nav-link.active{
  color:var(--primary);
}
.nav-link.active::after{
  width:100%;
}
.nav-cta{
  height:42px;
  padding:0 22px;
  font-size:0.875rem;
  flex-shrink:0;
}
.nav-toggle{
  display:none;
  width:42px;
  height:42px;
  border-radius:8px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  background:var(--primary-light);
}
.nav-toggle span{
  display:block;
  width:20px;
  height:2px;
  background:var(--ink);
  border-radius:2px;
  transition:all .3s ease;
}
.nav-toggle.active span:nth-child(1){
  transform:translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2){
  opacity:0;
}
.nav-toggle.active span:nth-child(3){
  transform:translateY(-7px) rotate(-45deg);
}

/* 分类页 Hero */
.category-hero{
  position:relative;
  padding:72px 0 64px;
  background:
    linear-gradient(100deg,rgba(22,33,36,0.94) 0%,rgba(22,33,36,0.82) 55%,rgba(22,33,36,0.65) 100%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  color:#fff;
  overflow:hidden;
}
.category-hero::after{
  content:"";
  position:absolute;
  top:-60px;
  right:-40px;
  width:320px;
  height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(14,159,141,0.30) 0%,transparent 70%);
  pointer-events:none;
}
.category-hero .container{
  position:relative;
  z-index:2;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:0.8125rem;
  color:rgba(255,255,255,0.65);
  margin-bottom:20px;
}
.breadcrumb a{
  color:rgba(255,255,255,0.65);
}
.breadcrumb a:hover{
  color:var(--primary);
}
.breadcrumb span{
  color:rgba(255,255,255,0.4);
}
.category-hero h1{
  font-size:clamp(2.25rem,5vw,3.25rem);
  font-weight:800;
  line-height:1.2;
  color:#fff;
  margin-bottom:20px;
  max-width:720px;
}
.category-hero .hero-desc{
  font-size:1.0625rem;
  line-height:1.9;
  color:rgba(255,255,255,0.82);
  max-width:720px;
  margin-bottom:32px;
}
.hero-actions{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}

/* 板块通用 */
.section{
  padding:80px 0;
}
.section-alt{
  background:var(--white);
}
.section-head{
  max-width:680px;
  margin-bottom:48px;
}
.section-head.center{
  margin-left:auto;
  margin-right:auto;
  text-align:center;
}
.section-head h2{
  font-size:clamp(1.75rem,3vw,2.25rem);
  font-weight:700;
  color:var(--ink);
  line-height:1.3;
  margin:12px 0 16px;
}
.section-head p{
  color:var(--text-weak);
  font-size:1rem;
}

/* 解决方案图文交替 */
.solution-block{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
  padding:56px 0;
}
.solution-block + .solution-block{
  border-top:1px solid var(--border);
}
.solution-block.reverse .solution-media{
  order:2;
}
.solution-block.reverse .solution-content{
  order:1;
}
.solution-media{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  aspect-ratio:4/3;
}
.solution-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.solution-media:hover img{
  transform:scale(1.04);
}
.media-badge{
  position:absolute;
  top:16px;
  left:16px;
  background:rgba(22,33,36,0.82);
  color:#fff;
  font-size:0.8125rem;
  font-weight:600;
  padding:6px 14px;
  border-radius:var(--radius-badge);
  backdrop-filter:blur(6px);
}
.solution-content h2{
  font-size:1.625rem;
  font-weight:700;
  color:var(--ink);
  line-height:1.3;
  margin:14px 0 16px;
}
.solution-content > p{
  color:var(--text-weak);
  font-size:1rem;
  margin-bottom:20px;
}
.solution-points{
  margin-bottom:22px;
}
.solution-points li{
  position:relative;
  padding-left:26px;
  margin-bottom:10px;
  font-size:0.9375rem;
  color:var(--text);
}
.solution-points li::before{
  content:"";
  position:absolute;
  left:0;
  top:12px;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--primary);
}
.solution-tags{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:26px;
}
.solution-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--primary);
  font-weight:600;
  font-size:0.9375rem;
  transition:gap .25s ease;
}
.solution-link:hover{
  gap:10px;
  color:var(--primary-dark);
}

/* 流程 */
.process-section{
  background:var(--dark);
  color:#fff;
}
.process-section .section-head h2{
  color:#fff;
}
.process-section .section-head p{
  color:rgba(255,255,255,0.6);
}
.process-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  counter-reset:process;
}
.process-item{
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.08);
  border-radius:var(--radius-card);
  padding:32px 24px;
  position:relative;
  transition:border-color .3s ease,transform .3s ease;
}
.process-item:hover{
  border-color:var(--primary);
  transform:translateY(-4px);
}
.process-item .step-num{
  font-family:var(--mono);
  font-size:0.8125rem;
  color:var(--primary);
  font-weight:600;
  letter-spacing:0.1em;
  margin-bottom:12px;
  display:block;
}
.process-item h3{
  font-size:1.125rem;
  font-weight:700;
  color:#fff;
  margin-bottom:10px;
}
.process-item p{
  font-size:0.875rem;
  color:rgba(255,255,255,0.62);
  line-height:1.8;
}

/* 数据统计 */
.stats-section{
  padding:64px 0;
  background:var(--white);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:40px;
}
.stat-item{
  text-align:center;
}
.stat-item .num{
  font-size:2.25rem;
  font-weight:800;
  color:var(--ink);
  font-family:var(--mono);
  line-height:1.2;
}
.stat-item .num em{
  font-style:normal;
  color:var(--accent);
}
.stat-item .label{
  font-size:0.875rem;
  color:var(--text-weak);
  margin-top:6px;
}

/* FAQ */
.faq-section{
  background:var(--white);
}
.faq-list{
  max-width:860px;
  margin:0 auto;
}
.faq-item{
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  background:var(--white);
  margin-bottom:16px;
  overflow:hidden;
  transition:box-shadow .3s ease,border-color .3s ease;
}
.faq-item.open{
  border-color:var(--primary);
  box-shadow:var(--shadow-sm);
}
.faq-question{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px 24px;
  text-align:left;
  font-size:1rem;
  font-weight:600;
  color:var(--ink);
  background:none;
  transition:color .25s ease;
}
.faq-question:hover{
  color:var(--primary);
}
.faq-question .icon{
  width:28px;
  height:28px;
  border-radius:50%;
  background:var(--primary-light);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
  transition:transform .35s ease,background .35s ease;
}
.faq-question .icon::before{
  content:"";
  width:12px;
  height:2px;
  background:var(--primary);
  border-radius:2px;
}
.faq-question .icon::after{
  content:"";
  position:absolute;
  width:2px;
  height:12px;
  background:var(--primary);
  border-radius:2px;
  transition:opacity .25s ease;
}
.faq-question .icon{
  position:relative;
}
.faq-item.open .faq-question .icon{
  background:var(--primary);
  transform:rotate(180deg);
}
.faq-item.open .faq-question .icon::before{
  background:#fff;
}
.faq-item.open .faq-question .icon::after{
  opacity:0;
}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .4s ease;
}
.faq-answer-inner{
  padding:0 24px 20px;
  border-left:3px solid var(--primary);
  margin-left:24px;
  color:var(--text-weak);
  font-size:0.9375rem;
  line-height:1.9;
}
.faq-item.open .faq-answer{
  max-height:320px;
}

/* CTA */
.cta-section{
  position:relative;
  padding:80px 0;
  background:
    linear-gradient(120deg,rgba(14,159,141,0.18) 0%,transparent 40%),
    var(--dark);
  color:#fff;
  overflow:hidden;
}
.cta-section::before{
  content:"";
  position:absolute;
  bottom:-80px;
  right:-60px;
  width:280px;
  height:280px;
  border-radius:50%;
  border:40px solid rgba(14,159,141,0.12);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  flex-wrap:wrap;
}
.cta-inner h2{
  font-size:clamp(1.75rem,3vw,2.25rem);
  font-weight:700;
  line-height:1.3;
  margin-bottom:12px;
}
.cta-inner p{
  color:rgba(255,255,255,0.7);
  max-width:520px;
  font-size:1rem;
}

/* 页脚 */
.site-footer{
  background:var(--dark);
  color:rgba(255,255,255,0.72);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:48px;
  padding-bottom:48px;
}
.footer-brand .logo{
  margin-bottom:16px;
}
.footer-brand .logo-text{
  color:#fff;
}
.footer-about{
  font-size:0.875rem;
  line-height:1.9;
  color:rgba(255,255,255,0.55);
  max-width:320px;
}
.footer-col h4{
  font-size:0.9375rem;
  font-weight:700;
  color:#fff;
  margin-bottom:18px;
  letter-spacing:0.02em;
}
.footer-col ul li{
  margin-bottom:10px;
}
.footer-col ul a{
  font-size:0.875rem;
  color:rgba(255,255,255,0.6);
  transition:color .25s ease;
}
.footer-col ul a:hover{
  color:var(--primary);
}
.footer-contact li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:0.875rem;
  color:rgba(255,255,255,0.6);
  margin-bottom:14px;
}
.footer-contact svg{
  width:16px;
  height:16px;
  flex-shrink:0;
  margin-top:5px;
  fill:none;
  stroke:var(--primary);
  stroke-width:2;
  stroke-linecap:round;
  stroke-linejoin:round;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.08);
  padding:20px 0;
  font-size:0.8125rem;
  color:rgba(255,255,255,0.4);
  text-align:center;
}
.footer-bottom .domain{
  font-family:var(--mono);
}

/* 响应式 */
@media (max-width:1024px){
  .nav-cta{display:none;}
  .nav-toggle{
    display:flex;
  }
  .main-nav{
    position:fixed;
    top:70px;
    left:0;
    right:0;
    background:#fff;
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    padding:0 24px;
    border-bottom:1px solid var(--border);
    box-shadow:var(--shadow-lg);
    max-height:0;
    overflow:hidden;
    transition:max-height .4s ease;
  }
  .main-nav.open{
    max-height:360px;
  }
  .main-nav .nav-link{
    display:block;
    width:100%;
    padding:16px 0;
    font-size:1.0625rem;
    border-bottom:1px solid var(--border);
  }
  .main-nav .nav-link::after{
    display:none;
  }
  .solution-block{
    grid-template-columns:1fr;
    gap:32px;
  }
  .solution-block.reverse .solution-media{
    order:0;
  }
  .solution-block.reverse .solution-content{
    order:1;
  }
  .process-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .stats-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:32px;
  }
}
@media (max-width:768px){
  .section{
    padding:56px 0;
  }
  .category-hero{
    padding:48px 0 48px;
  }
  .category-hero h1{
    font-size:2rem;
  }
  .hero-actions .btn{
    width:100%;
  }
  .process-grid{
    grid-template-columns:1fr;
  }
  .stats-grid{
    grid-template-columns:1fr 1fr;
    gap:28px;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
  }
  .cta-inner{
    flex-direction:column;
    align-items:flex-start;
  }
  .solution-content h2{
    font-size:1.375rem;
  }
}
@media (max-width:520px){
  .container{
    padding:0 16px;
  }
  .logo-text{
    font-size:1.15rem;
  }
  .stats-grid{
    grid-template-columns:1fr;
  }
  .faq-question{
    padding:16px;
    font-size:0.9375rem;
  }
  .faq-answer-inner{
    padding:0 16px 16px;
  }
}

/* roulang page: category3 */
:root {
  --primary: #0E9F8D;
  --primary-dark: #0B8577;
  --primary-light: rgba(14, 159, 141, 0.1);
  --ink: #1F2A30;
  --ink-soft: #4A5A63;
  --bg: #F4F7F5;
  --bg-deep: #162124;
  --accent: #F5A623;
  --line: #E5EBEA;
  --white: #FFFFFF;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 16px;
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-hover: 0 10px 24px rgba(0, 0, 0, 0.10);
  --container-width: 1280px;
  --header-height: 70px;
  --space-section: 80px;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Menlo, Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.25s ease;
}

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

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

ul,
ol {
  list-style: none;
}

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

/* ==== Buttons ==== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  border: 1px solid var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(14, 159, 141, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: 3px solid rgba(14, 159, 141, 0.4);
  outline-offset: 2px;
}

/* ==== Header & Nav ==== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  z-index: 1000;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 32px;
}

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

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary);
  color: var(--white);
  flex-shrink: 0;
}

.logo-mark svg {
  width: 20px;
  height: 20px;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  margin: 0 auto;
}

.nav-link {
  position: relative;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 6px 2px;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -2px;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  border-radius: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 24px;
}

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

.nav-cta {
  height: 40px;
  padding: 0 22px;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  border-radius: 8px;
  background: transparent;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 22px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==== Category Hero ==== */
.category-hero {
  position: relative;
  padding: 130px 0 68px;
  background: linear-gradient(120deg, rgba(22, 33, 36, 0.92) 0%, rgba(22, 33, 36, 0.78) 60%, rgba(22, 33, 36, 0.6) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  color: var(--white);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 18px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.85);
}

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

.breadcrumb span {
  color: rgba(255, 255, 255, 0.45);
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--white);
  letter-spacing: -0.01em;
}

.hero-title .highlight {
  color: var(--primary);
}

.hero-desc {
  max-width: 720px;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
}

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

.section-head {
  margin-bottom: 36px;
  text-align: center;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 0.9375rem;
  color: var(--ink-soft);
}

/* ==== News List (Vertical stacked) ==== */
.news-section {
  background: var(--white);
}

.news-list {
  max-width: 1080px;
  margin: 0 auto;
}

.news-list-item {
  display: grid;
  grid-template-columns: 150px 1fr 100px;
  gap: 28px;
  align-items: center;
  padding: 24px 4px;
  border-bottom: 1px solid var(--line);
  transition: background 0.25s ease, padding-left 0.25s ease;
}

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

.news-list-item:hover {
  background: #FAFCFB;
  padding-left: 12px;
}

.news-date {
  font-family: var(--font-mono);
  color: var(--ink-soft);
  font-size: 0.875rem;
  display: flex;
  flex-direction: column;
  line-height: 1.4;
}

.news-date .date-day {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}

.news-date .date-month {
  font-size: 0.8125rem;
  color: var(--ink-soft);
}

.news-body .news-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
  transition: color 0.25s ease;
}

.news-list-item:hover .news-title {
  color: var(--primary);
}

.news-body .news-summary {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  padding: 0 12px;
  border-radius: var(--radius-tag);
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  justify-self: end;
}

.news-footer {
  text-align: center;
  margin-top: 36px;
}

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

.channel-grid {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.channel-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 26px 28px;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

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

.channel-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  flex-shrink: 0;
  width: 36px;
}

.channel-body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.channel-body p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ==== Media Data ==== */
.media-data {
  background: var(--bg-deep);
  padding: 56px 0;
  color: var(--white);
}

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

.media-stat {
  padding: 20px 16px;
}

.media-num {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1.3;
  margin-bottom: 4px;
}

.media-label {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.04em;
}

/* ==== Topics ==== */
.topics-section {
  background: var(--white);
}

.topics-wrap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.topic-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

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

.topic-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

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

.topic-card:hover .topic-cover img {
  transform: scale(1.03);
}

.topic-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(22, 33, 36, 0.35) 0%, transparent 60%);
}

.topic-body {
  padding: 20px 24px 24px;
}

.topic-body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.topic-body p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

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

.faq-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  gap: 16px;
}

.faq-question .faq-icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.faq-question .faq-icon::before,
.faq-question .faq-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.faq-question .faq-icon::before {
  width: 16px;
  height: 2px;
}

.faq-question .faq-icon::after {
  width: 2px;
  height: 16px;
}

.faq-item.open .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  border-left: 3px solid var(--primary);
  margin-left: 24px;
  margin-right: 24px;
  background: #FAFCFB;
  border-radius: 0 8px 8px 0;
}

.faq-item.open .faq-answer {
  max-height: 260px;
  padding: 16px 20px;
  margin-bottom: 20px;
}

.faq-answer p {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.75;
}

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

.faq-question:focus-visible {
  outline: 3px solid rgba(14, 159, 141, 0.4);
  outline-offset: -2px;
}

/* ==== CTA ==== */
.cta-section {
  padding: var(--space-section) 0;
  background: var(--bg-deep);
}

.cta-box {
  position: relative;
  background: linear-gradient(135deg, rgba(14, 159, 141, 0.15) 0%, rgba(22, 33, 36, 0.4) 50%, rgba(245, 166, 35, 0.1) 100%), var(--bg-deep);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 56px 48px;
  text-align: center;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.cta-box h2 {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

.cta-box p {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 28px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

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

.cta-actions .btn-primary {
  border-color: var(--primary);
}

.cta-actions .btn-outline {
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--white);
}

.cta-actions .btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--white);
}

/* ==== Footer ==== */
.site-footer {
  background: var(--bg-deep);
  color: rgba(255, 255, 255, 0.78);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1.1fr;
  gap: 48px;
  padding-bottom: 48px;
}

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

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

.footer-about {
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 360px;
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 16px;
}

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

.footer-col ul a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.65);
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.footer-col ul a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.6;
}

.footer-contact svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.45);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.55);
}

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

/* ==== Responsive ==== */
@media (max-width: 1024px) {
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    padding: 16px 24px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    margin: 0;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    padding: 14px 0;
    font-size: 1.0625rem;
    border-bottom: 1px solid var(--line);
  }

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

  .nav-link::after {
    bottom: 8px;
  }

  .nav-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .media-grid {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 32px;
  }

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

  .news-list-item {
    grid-template-columns: 120px 1fr;
    gap: 20px;
  }

  .news-tag {
    grid-column: 2;
    justify-self: start;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 56px;
  }

  .channel-grid {
    grid-template-columns: 1fr;
  }

  .topics-wrap {
    display: flex;
    overflow-x: auto;
    gap: 16px;
    padding-bottom: 12px;
    scroll-snap-type: x mandatory;
  }

  .topic-card {
    min-width: 280px;
    scroll-snap-align: start;
  }

  .cta-box {
    padding: 40px 24px;
  }

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

  .cta-actions .btn {
    width: 100%;
    max-width: 280px;
  }
}

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

  .news-list-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 20px 2px;
  }

  .news-date {
    flex-direction: row;
    gap: 8px;
    font-size: 0.8125rem;
  }

  .news-date .date-day {
    font-size: 1.25rem;
  }

  .news-tag {
    grid-column: 1;
    justify-self: start;
    margin-top: 4px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .media-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-title {
    font-size: clamp(1.9rem, 7vw, 2.4rem);
  }

  .channel-item {
    padding: 20px;
  }

  .cta-box {
    padding: 32px 18px;
  }
}