/* roulang page: index */
:root{
  --primary:#0F766E;
  --primary-hover:#115E59;
  --primary-light:#CCFBF1;
  --primary-glow:rgba(15,118,110,0.15);
  --accent:#EA580C;
  --accent-hover:#C2410C;
  --bg:#F7F9F8;
  --card:#FFFFFF;
  --dark:#102A2A;
  --dark-2:#0B1F1F;
  --text:#1F2937;
  --text-2:#4B5563;
  --text-3:#9CA3AF;
  --border:#E8EDEB;
  --line:#D1D5DB;
  --dark-text:#F0FDFA;
  --dark-text-2:#CBD5D1;
  --dark-line:rgba(255,255,255,0.10);
  --radius-lg:12px;
  --radius-md:8px;
  --radius-full:999px;
  --shadow-1:0 1px 2px rgba(16,42,42,0.06),0 4px 12px rgba(16,42,42,0.05);
  --shadow-2:0 2px 4px rgba(16,42,42,0.08),0 12px 28px rgba(16,42,42,0.10);
  --container:1200px;
  --space-section:96px;
  --space-section-mb:56px;
  --font-system:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--font-system);background:var(--bg);color:var(--text);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:none;background:none;}
.container{max-width:var(--container);margin:0 auto;padding:0 32px;}
.section{padding:var(--space-section) 0;}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:40px;}
.section-head .bar{width:4px;height:24px;background:var(--primary);border-radius:2px;margin-right:12px;flex-shrink:0;}
.section-head h2{font-size:32px;font-weight:700;display:flex;align-items:center;line-height:1.3;letter-spacing:-0.3px;}
.section-head .view-all{font-size:14px;color:var(--text-2);display:inline-flex;align-items:center;gap:4px;transition:all 0.3s;flex-shrink:0;}
.section-head .view-all:hover{color:var(--primary);}
.section-head .view-all:hover svg{transform:translateX(3px);}
.section-head .view-all svg{transition:transform 0.3s;}

/* 顶部导航 */
.site-header{background:var(--dark);position:sticky;top:0;z-index:100;border-bottom:1px solid var(--dark-line);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px;}
.brand{display:flex;align-items:center;gap:8px;flex-shrink:0;}
.brand-badge{width:32px;height:32px;background:var(--primary);border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;}
.brand-badge svg{width:18px;height:18px;}
.brand-text{font-size:20px;font-weight:700;color:var(--dark-text);letter-spacing:0.5px;}
.brand-text span{color:var(--primary-light);}
.search-box{flex:1;max-width:540px;margin:0 auto;position:relative;}
.search-box svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:18px;height:18px;color:var(--primary);pointer-events:none;}
.search-box input{width:100%;height:40px;border-radius:var(--radius-md);border:1px solid var(--line);background:#fff;padding:0 16px 0 42px;font-size:14px;color:var(--text);outline:none;transition:border-color 0.3s,box-shadow 0.3s;}
.search-box input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow);}
.search-box input::placeholder{color:var(--text-3);}
.nav-links{display:flex;align-items:center;gap:28px;flex-shrink:0;}
.nav-links a{font-size:15px;font-weight:500;color:var(--dark-text-2);position:relative;padding:8px 0;transition:color 0.3s;}
.nav-links a:hover,.nav-links a.active{color:#fff;}
.nav-links a.active::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;background:var(--primary);border-radius:2px;}
.nav-cta{flex-shrink:0;margin-left:8px;}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:#fff;font-size:15px;font-weight:600;padding:11px 28px;border-radius:var(--radius-md);transition:background 0.3s,transform 0.2s,box-shadow 0.3s;line-height:1.2;}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 20px rgba(234,88,12,0.25);}
.btn-primary:focus{outline:3px solid rgba(234,88,12,0.3);outline-offset:2px;}
.btn-outline-white{display:inline-flex;align-items:center;justify-content:center;background:transparent;color:#fff;font-size:15px;font-weight:500;padding:11px 28px;border-radius:var(--radius-md);border:2px solid rgba(255,255,255,0.7);transition:background 0.3s,transform 0.2s;line-height:1.2;}
.btn-outline-white:hover{background:rgba(255,255,255,0.08);transform:translateY(-2px);}
.mobile-toggle{display:none;flex-direction:column;gap:5px;padding:6px;cursor:pointer;background:none;border:none;}
.mobile-toggle span{width:22px;height:2px;background:var(--dark-text);border-radius:2px;transition:all 0.3s;}

/* Hero */
.hero{background:var(--dark);position:relative;color:var(--dark-text);padding:100px 0 140px;overflow:hidden;}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:0.35;}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(16,42,42,0.6) 0%,rgba(16,42,42,0.7) 50%,rgba(16,42,42,0.9) 100%);}
.hero-content{position:relative;z-index:2;max-width:800px;margin:0 auto;text-align:center;}
.hero h1{font-size:56px;font-weight:800;line-height:1.2;letter-spacing:-0.5px;margin-bottom:20px;color:var(--dark-text);}
.hero h1 span{color:var(--primary-light);}
.hero-sub{font-size:18px;color:var(--dark-text-2);line-height:1.7;max-width:640px;margin:0 auto 36px;}
.hero-actions{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;}
.hero-catalog{margin-top:-60px;position:relative;z-index:5;}
.catalog-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.catalog-card{background:rgba(255,255,255,0.94);backdrop-filter:blur(8px);border-radius:var(--radius-lg);padding:24px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow-2);border:1px solid rgba(255,255,255,0.6);transition:transform 0.3s,box-shadow 0.3s;}
.catalog-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(16,42,42,0.15);}
.catalog-icon{width:44px;height:44px;border-radius:var(--radius-md);background:var(--primary-light);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--primary);}
.catalog-icon svg{width:22px;height:22px;}
.catalog-info h3{font-size:16px;font-weight:600;color:var(--text);margin-bottom:2px;}
.catalog-info p{font-size:13px;color:var(--text-2);}

/* 核心产品与方案 */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.product-card{background:var(--card);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-1);border:1px solid var(--border);transition:transform 0.3s,box-shadow 0.3s;display:flex;flex-direction:column;}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.product-card .thumb{aspect-ratio:16/10;overflow:hidden;position:relative;background:var(--primary-light);}
.product-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s;}
.product-card:hover .thumb img{transform:scale(1.05);}
.product-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.product-tag{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:12px;font-weight:600;padding:3px 12px;border-radius:var(--radius-full);margin-bottom:12px;align-self:flex-start;}
.product-body h3{font-size:20px;font-weight:600;margin-bottom:8px;line-height:1.4;}
.product-body p{font-size:14px;color:var(--text-2);line-height:1.7;margin-bottom:16px;flex:1;}
.product-link{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:4px;transition:gap 0.3s;}
.product-link:hover{gap:8px;}

/* 资讯动态 */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.news-card{background:var(--card);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-1);border:1px solid var(--border);display:flex;gap:20px;transition:transform 0.3s,box-shadow 0.3s;align-items:flex-start;}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.news-thumb{width:120px;height:80px;border-radius:var(--radius-md);overflow:hidden;flex-shrink:0;background:var(--primary-light);}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-body{flex:1;}
.news-cat{display:inline-block;font-size:12px;color:var(--primary);background:var(--primary-light);padding:2px 10px;border-radius:var(--radius-full);font-weight:500;margin-bottom:8px;}
.news-body h3{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-body p{font-size:14px;color:var(--text-2);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:10px;}
.news-meta{font-size:13px;color:var(--text-3);display:flex;align-items:center;gap:12px;}
.news-empty{background:var(--bg);border:1px dashed var(--line);border-radius:var(--radius-lg);padding:48px 24px;text-align:center;color:var(--text-2);font-size:15px;display:none;}
.news-empty.show{display:block;}

/* 为什么选择 */
.why-section{background:var(--card);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.why-wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:56px;align-items:center;}
.why-list{display:flex;flex-direction:column;gap:28px;}
.why-item{display:flex;gap:16px;align-items:flex-start;}
.why-item .icon{width:40px;height:40px;border-radius:var(--radius-md);background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.why-item .icon svg{width:20px;height:20px;}
.why-item h3{font-size:18px;font-weight:600;margin-bottom:4px;}
.why-item p{font-size:15px;color:var(--text-2);line-height:1.7;}
.why-stats{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.stat-card{background:var(--bg);border-radius:var(--radius-lg);border:1px solid var(--border);padding:28px 20px;text-align:center;}
.stat-card .num{font-size:36px;font-weight:800;color:var(--primary);line-height:1.2;font-family:var(--font-system);}
.stat-card .label{font-size:14px;color:var(--text-2);margin-top:8px;}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:16px;}
.faq-item{background:var(--card);border-radius:var(--radius-lg);border:1px solid var(--border);box-shadow:var(--shadow-1);overflow:hidden;}
.faq-q{width:100%;padding:20px 24px;font-size:16px;font-weight:600;color:var(--text);display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;transition:color 0.3s;}
.faq-q:hover{color:var(--primary);}
.faq-q .icon{font-size:24px;font-weight:300;transition:transform 0.3s;flex-shrink:0;color:var(--primary);}
.faq-item.open .faq-q .icon{transform:rotate(45deg);}
.faq-a{display:none;padding:0 24px 20px;font-size:15px;line-height:1.8;color:var(--text-2);border-top:1px solid var(--border);padding-top:16px;}
.faq-item.open .faq-a{display:block;}

/* CTA */
.cta-section{background:var(--dark);position:relative;overflow:hidden;}
.cta-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;opacity:0.2;}
.cta-content{position:relative;z-index:2;text-align:center;padding:80px 0;}
.cta-content h2{font-size:36px;color:var(--dark-text);font-weight:700;margin-bottom:16px;}
.cta-content p{font-size:16px;color:var(--dark-text-2);max-width:560px;margin:0 auto 36px;}
.cta-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;}
.cta-share{margin-top:32px;}
.cta-share .share-label{font-size:13px;color:var(--dark-text-2);margin-bottom:12px;}
.share-icons{display:flex;justify-content:center;gap:16px;}
.share-icons a{width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,0.3);display:inline-flex;align-items:center;justify-content:center;color:var(--dark-text-2);font-size:16px;transition:all 0.3s;}
.share-icons a:hover{background:rgba(255,255,255,0.1);color:#fff;border-color:#fff;}

/* 页脚 */
.site-footer{background:var(--dark-2);color:var(--dark-text-2);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:48px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.7;margin-bottom:16px;max-width:280px;}
.footer-icp{font-size:12px;color:var(--text-3);}
.footer-col h4{font-size:15px;color:var(--dark-text);margin-bottom:16px;font-weight:600;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--dark-text-2);transition:color 0.3s;}
.footer-col ul a:hover{color:#fff;}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;margin-bottom:14px;font-size:14px;line-height:1.6;}
.footer-contact li svg{width:16px;height:16px;flex-shrink:0;color:var(--primary);margin-top:2px;}
.footer-bottom{border-top:1px solid var(--dark-line);padding:24px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--text-3);}

/* 响应式 */
@media(max-width:1024px){
  .nav-cta{display:none;}
  .catalog-grid{grid-template-columns:repeat(2,1fr);}
  .product-grid{grid-template-columns:repeat(2,1fr);}
  .why-wrap{grid-template-columns:1fr;gap:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
}
@media(max-width:768px){
  .container{padding:0 20px;}
  .section{padding:var(--space-section-mb) 0;}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--dark);flex-direction:column;padding:20px;gap:0;border-bottom:1px solid var(--dark-line);}
  .nav-links a{padding:14px 0;width:100%;border-bottom:1px solid var(--dark-line);}
  .nav-links a:last-child{border-bottom:none;}
  .nav-links.show{display:flex;}
  .mobile-toggle{display:flex;}
  .search-box{order:3;max-width:100%;flex:0 0 100%;margin:12px 0 0;padding-bottom:12px;}
  .nav-wrap{flex-wrap:wrap;height:auto;padding:12px 0;}
  .hero{padding:64px 0 120px;}
  .hero h1{font-size:36px;line-height:1.25;}
  .hero-sub{font-size:16px;}
  .catalog-grid{grid-template-columns:1fr;margin-top:-70px;}
  .product-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .news-card{flex-direction:column;}
  .news-thumb{width:100%;height:160px;}
  .why-stats{grid-template-columns:1fr 1fr;}
  .section-head h2{font-size:24px;}
  .section-head .view-all{font-size:13px;}
  .cta-content h2{font-size:28px;}
  .cta-content{padding:56px 0;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;text-align:center;}
  .catalog-info p{font-size:13px;}
}
@media(max-width:520px){
  .hero h1{font-size:32px;}
  .hero-actions .btn-primary,.hero-actions .btn-outline-white{padding:10px 20px;font-size:14px;}
  .stat-card .num{font-size:28px;}
  .why-stats{grid-template-columns:1fr;}
  .news-thumb{height:140px;}
  .brand-text{font-size:18px;}
}

/* roulang page: article */
:root {
    --primary: #0F766E;
    --primary-hover: #115E59;
    --primary-light: #CCFBF1;
    --primary-glow: rgba(15, 118, 110, 0.15);
    --accent: #EA580C;
    --accent-hover: #C2410C;
    --accent-glow: rgba(234, 88, 12, 0.3);
    --bg: #F7F9F8;
    --card-bg: #FFFFFF;
    --dark-bg: #102A2A;
    --dark-bg-2: #0B1F1F;
    --text: #1F2937;
    --text-secondary: #4B5563;
    --text-muted: #9CA3AF;
    --border: #E8EDEB;
    --dark-text: #F0FDFA;
    --dark-secondary: #CBD5D1;
    --dark-border: rgba(255,255,255,0.10);
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-badge: 999px;
    --shadow-card: 0 1px 2px rgba(16,42,42,0.06), 0 4px 12px rgba(16,42,42,0.05);
    --shadow-hover: 0 2px 4px rgba(16,42,42,0.08), 0 12px 28px rgba(16,42,42,0.10);
    --font: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --container-w: 1200px;
    --space-section: 96px;
    --space-section-mobile: 56px;
}
*, *::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: 1.75; font-size: 16px; -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-hover); }
button { font-family: var(--font); cursor: pointer; }
input, textarea { font-family: var(--font); }
ul, ol { list-style: none; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 32px; }
@media (max-width: 767px) {
    .container { padding: 0 20px; }
}

/* ===================== 导航 ===================== */
.site-header { position: sticky; top: 0; z-index: 100; background: var(--dark-bg); border-bottom: 1px solid var(--dark-border); }
.header-inner { display: flex; align-items: center; height: 64px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; flex-shrink: 0; }
.brand-badge { width: 38px; height: 38px; border-radius: 10px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); display: flex; align-items: center; justify-content: center; color: var(--primary-light); }
.brand-badge svg { width: 22px; height: 22px; }
.brand-text { font-size: 20px; font-weight: 800; letter-spacing: -0.3px; color: var(--dark-text); line-height: 1.2; }
.header-search { flex: 1; max-width: 540px; position: relative; margin: 0 auto; }
.header-search svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; color: var(--primary); pointer-events: none; }
.header-search input { width: 100%; height: 40px; border-radius: var(--radius-btn); border: 1px solid #D1D5DB; background: #fff; padding: 0 16px 0 42px; font-size: 14px; color: var(--text); outline: none; transition: border-color 0.2s, box-shadow 0.2s; }
.header-search input::placeholder { color: var(--text-muted); }
.header-search input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); }
.nav-links { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.nav-links a { padding: 8px 14px; font-size: 15px; font-weight: 500; color: var(--dark-secondary); border-radius: 6px; text-decoration: none; transition: color 0.2s, background 0.2s; }
.nav-links a:hover { color: var(--dark-text); background: rgba(255,255,255,0.06); }
.nav-links a.active { color: var(--dark-text); background: rgba(255,255,255,0.10); }
.header-cta { flex-shrink: 0; }
.btn-accent { display: inline-flex; align-items: center; justify-content: center; height: 40px; padding: 0 20px; background: var(--accent); color: #fff; border: none; border-radius: var(--radius-btn); font-size: 14px; font-weight: 600; cursor: pointer; transition: background 0.2s, transform 0.2s, box-shadow 0.2s; text-decoration: none; }
.btn-accent:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(234,88,12,0.25); color: #fff; }
.btn-accent:focus { outline: none; box-shadow: 0 0 0 3px var(--accent-glow); }
.nav-toggle { display: none; width: 44px; height: 44px; background: transparent; border: none; border-radius: 8px; color: var(--dark-text); align-items: center; justify-content: center; font-size: 22px; }
.nav-toggle:focus { outline: none; box-shadow: 0 0 0 3px rgba(255,255,255,0.2); }
@media (max-width: 1023px) {
    .header-inner { flex-wrap: wrap; height: auto; padding: 12px 0; gap: 12px; }
    .header-search { order: 3; max-width: 100%; flex-basis: 100%; }
    .nav-links { display: none; flex-basis: 100%; flex-direction: column; align-items: stretch; gap: 4px; padding: 8px 0 12px; }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 12px 8px; border-radius: 8px; }
    .nav-toggle { display: inline-flex; margin-left: auto; }
    .header-cta { order: 2; }
}
@media (max-width: 639px) {
    .header-inner { gap: 10px; }
    .brand-text { font-size: 18px; }
    .brand-badge { width: 34px; height: 34px; }
    .header-cta .btn-accent { font-size: 13px; padding: 0 14px; height: 36px; }
}

/* ===================== 面包屑 ===================== */
.breadcrumb { padding: 24px 0 8px; font-size: 14px; color: var(--text-muted); display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #D1D5DB; margin: 0 2px; }
.breadcrumb .current { color: var(--text); font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 360px; }
@media (max-width: 767px) { .breadcrumb .current { max-width: 200px; } }

/* ===================== 文章主体 ===================== */
.article-main { padding: 32px 0 0; }
.article-header { max-width: 800px; margin: 0 auto 32px; }
.category-badge { display: inline-block; padding: 4px 16px; border-radius: var(--radius-badge); background: var(--primary-light); color: var(--primary); font-size: 13px; font-weight: 600; margin-bottom: 16px; }
.article-title { font-size: clamp(30px, 4vw, 42px); font-weight: 700; line-height: 1.25; color: var(--text); letter-spacing: -0.5px; margin-bottom: 20px; }
.article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; font-size: 14px; color: var(--text-muted); }
.article-meta .meta-item { display: flex; align-items: center; gap: 6px; }
.article-meta svg { width: 16px; height: 16px; }
.article-body { max-width: 800px; margin: 0 auto; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 48px 56px; box-shadow: var(--shadow-card); }
.article-body p { font-size: 16px; line-height: 1.9; margin-bottom: 1.5em; color: var(--text); }
.article-body h2, .article-body h3, .article-body h4 { color: var(--text); font-weight: 700; margin: 1.5em 0 0.75em; line-height: 1.4; }
.article-body h2 { font-size: 26px; }
.article-body h3 { font-size: 22px; }
.article-body h4 { font-size: 19px; }
.article-body img { border-radius: var(--radius-card); margin: 24px 0; }
.article-body blockquote { border-left: 4px solid var(--primary); background: var(--primary-light); padding: 16px 20px; border-radius: 0 8px 8px 0; margin: 24px 0; color: var(--text); font-size: 15px; }
.article-body blockquote p { margin-bottom: 0.5em; }
.article-body blockquote p:last-child { margin-bottom: 0; }
.article-body ul, .article-body ol { padding-left: 24px; margin: 16px 0 24px; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 8px; line-height: 1.8; }
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--primary-hover); }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.article-body table th, .article-body table td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; }
.article-body table th { background: var(--bg); font-weight: 600; color: var(--text); }
.article-body table td { color: var(--text-secondary); }
.article-body pre { background: var(--dark-bg); color: var(--dark-text); padding: 20px 24px; border-radius: var(--radius-card); overflow-x: auto; margin: 24px 0; font-size: 14px; line-height: 1.7; }
.article-body code { font-family: "SFMono-Regular", Consolas, monospace; }
.article-body code:not(pre code) { background: var(--bg); border: 1px solid var(--border); padding: 2px 6px; border-radius: 4px; font-size: 13px; color: var(--primary); }
.table-wrap { overflow-x: auto; margin: 24px 0; }
.table-wrap table { margin: 0; }
/* 文章底部 */
.article-footer { max-width: 800px; margin: 32px auto 0; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-badge { display: inline-flex; align-items: center; padding: 6px 14px; border-radius: var(--radius-badge); border: 1px solid var(--border); background: var(--card-bg); font-size: 13px; color: var(--text-secondary); transition: border-color 0.2s, color 0.2s; }
.tag-badge:hover { border-color: var(--primary); color: var(--primary); }
.article-actions { display: flex; gap: 12px; align-items: center; }
.btn-outline { display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 20px; background: transparent; color: var(--text); border: 1.5px solid var(--border); border-radius: var(--radius-btn); font-size: 14px; font-weight: 500; transition: all 0.2s; text-decoration: none; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(15,118,110,0.04); }
.btn-outline svg { width: 16px; height: 16px; }
.btn-solid { display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 20px; background: var(--primary); color: #fff; border: none; border-radius: var(--radius-btn); font-size: 14px; font-weight: 600; transition: background 0.2s, transform 0.2s; text-decoration: none; }
.btn-solid:hover { background: var(--primary-hover); transform: translateY(-1px); color: #fff; }
.btn-solid svg { width: 16px; height: 16px; }
/* 内容未找到 */
.not-found { max-width: 800px; margin: 80px auto; text-align: center; padding: 64px 32px; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-card); }
.not-found .nf-icon { width: 64px; height: 64px; border-radius: 50%; background: var(--primary-light); display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; color: var(--primary); }
.not-found .nf-icon svg { width: 32px; height: 32px; }
.not-found h2 { font-size: 24px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.not-found p { color: var(--text-secondary); margin-bottom: 24px; }
.not-found .back-link { display: inline-flex; align-items: center; gap: 8px; color: var(--primary); font-weight: 500; }
.not-found .back-link:hover { color: var(--primary-hover); }

/* ===================== 相关推荐 ===================== */
.related-section { padding: var(--space-section) 0; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 40px; }
.section-title-wrap { display: flex; align-items: center; gap: 12px; }
.title-bar { width: 4px; height: 24px; border-radius: 2px; background: var(--primary); flex-shrink: 0; }
.section-title { font-size: clamp(24px, 3vw, 32px); font-weight: 700; color: var(--text); letter-spacing: -0.3px; }
.view-all { display: inline-flex; align-items: center; gap: 4px; font-size: 14px; color: var(--text-secondary); font-weight: 500; }
.view-all svg { width: 16px; height: 16px; transition: transform 0.2s; }
.view-all:hover { color: var(--primary); }
.view-all:hover svg { transform: translateX(3px); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); transition: transform 0.25s ease, box-shadow 0.25s ease; display: flex; flex-direction: column; }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.related-card .rc-img { height: 160px; overflow: hidden; }
.related-card .rc-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.related-card:hover .rc-img img { transform: scale(1.04); }
.related-card .rc-body { padding: 20px 20px 16px; flex: 1; display: flex; flex-direction: column; }
.related-card .rc-title { font-size: 17px; font-weight: 600; color: var(--text); line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .rc-title:hover { color: var(--primary); }
.related-card .rc-meta { font-size: 13px; color: var(--text-muted); margin-top: auto; display: flex; align-items: center; justify-content: space-between; }
.related-card .rc-meta .rm-time { display: flex; align-items: center; gap: 5px; }
.related-card .rc-meta svg { width: 14px; height: 14px; }
.back-to-list { display: inline-flex; align-items: center; gap: 6px; margin-top: 40px; font-size: 15px; color: var(--text-secondary); font-weight: 500; }
.back-to-list svg { width: 18px; height: 18px; transition: transform 0.2s; }
.back-to-list:hover { color: var(--primary); }
.back-to-list:hover svg { transform: translateX(-3px); }
@media (max-width: 767px) {
    .related-grid { grid-template-columns: 1fr; }
    .related-card .rc-img { height: 200px; }
}

/* ===================== CTA ===================== */
.cta-section { background: var(--dark-bg); padding: 72px 0; position: relative; }
.cta-inner { text-align: center; max-width: 720px; margin: 0 auto; }
.cta-inner h2 { color: #fff; font-size: clamp(26px, 3.5vw, 38px); font-weight: 700; line-height: 1.3; margin-bottom: 16px; letter-spacing: -0.5px; }
.cta-inner p { color: var(--dark-secondary); font-size: 16px; line-height: 1.7; margin-bottom: 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-share { display: flex; justify-content: center; gap: 12px; margin-top: 32px; align-items: center; }
.cta-share .share-divider { width: 1px; height: 20px; background: var(--dark-border); }
.share-btn { width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center; border-radius: 50%; border: 1px solid var(--dark-border); color: var(--dark-secondary); background: transparent; transition: all 0.2s; }
.share-btn:hover { border-color: var(--primary-light); color: var(--primary-light); background: rgba(255,255,255,0.05); }
.share-btn svg { width: 18px; height: 18px; }
@media (max-width: 639px) {
    .cta-actions .btn-accent, .cta-actions .btn-outline.white { width: 100%; }
}
.btn-outline.white { border-color: rgba(255,255,255,0.5); color: #fff; }
.btn-outline.white:hover { border-color: #fff; background: rgba(255,255,255,0.08); color: #fff; }

/* ===================== 页脚 ===================== */
.site-footer { background: var(--dark-bg-2); padding: 64px 0 0; color: var(--dark-secondary); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 48px; padding-bottom: 48px; }
.footer-brand .brand { margin-bottom: 20px; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: var(--dark-secondary); max-width: 320px; margin-bottom: 24px; }
.brand .brand-text { color: var(--dark-text); }
.footer-icp { font-size: 13px; color: var(--text-muted); }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul li a { color: var(--dark-secondary); font-size: 14px; transition: color 0.2s; }
.footer-col ul li a:hover { color: #fff; }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--dark-secondary); line-height: 1.6; }
.footer-contact li svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 3px; color: var(--primary-light); }
.footer-bottom { border-top: 1px solid var(--dark-border); padding: 24px 0; text-align: center; font-size: 13px; color: var(--text-muted); }
@media (max-width: 1023px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 639px) {
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* ===================== 文章页适配 ===================== */
@media (max-width: 767px) {
    .article-body { padding: 28px 20px; border-radius: 8px; }
    .article-main { padding-top: 16px; }
    .article-header { margin-bottom: 24px; }
    .article-title { font-size: 24px; line-height: 1.35; }
    .article-footer { flex-direction: column; align-items: flex-start; }
    .article-actions { width: 100%; }
    .article-actions .btn-outline, .article-actions .btn-solid { flex: 1; justify-content: center; }
}

/* roulang page: category1 */
:root {
      --primary: #0F766E;
      --primary-hover: #115E59;
      --primary-light: #CCFBF1;
      --primary-glow: rgba(15, 118, 110, 0.15);
      --accent: #EA580C;
      --accent-hover: #C2410C;
      --accent-glow: rgba(234, 88, 12, 0.3);
      --bg: #F7F9F8;
      --card: #FFFFFF;
      --dark: #102A2A;
      --dark-deep: #0B1F1F;
      --text: #1F2937;
      --text-secondary: #4B5563;
      --text-muted: #9CA3AF;
      --border: #D1D5DB;
      --border-light: #E8EDEB;
      --dark-text: #F0FDFA;
      --dark-text-secondary: #CBD5D1;
      --dark-border: rgba(255, 255, 255, 0.10);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-badge: 999px;
      --shadow-card: 0 1px 2px rgba(16, 42, 42, 0.06), 0 4px 12px rgba(16, 42, 42, 0.05);
      --shadow-hover: 0 2px 4px rgba(16, 42, 42, 0.08), 0 12px 28px rgba(16, 42, 42, 0.10);
      --container: 1200px;
      --space-section: 96px;
      --space-section-mobile: 56px;
      --font: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font);
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      -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;
      border: none;
      outline: none;
    }

    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding-left: 32px;
      padding-right: 32px;
    }

    /* ===== 导航 ===== */
    .site-header {
      background: var(--dark);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 2px 8px rgba(16, 42, 42, 0.4);
    }

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

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

    .brand-badge {
      width: 36px;
      height: 36px;
      background: var(--primary-light);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      flex-shrink: 0;
    }

    .brand-badge svg {
      width: 20px;
      height: 20px;
    }

    .brand-text {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.3px;
      color: var(--dark-text);
      white-space: nowrap;
    }

    .search-box {
      flex: 1;
      max-width: 540px;
      height: 40px;
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-btn);
      display: flex;
      align-items: center;
      padding: 0 14px;
      gap: 8px;
      transition: border-color 0.2s, box-shadow 0.2s;
      margin-left: 24px;
    }

    .search-box:focus-within {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px var(--primary-glow);
    }

    .search-box svg {
      width: 18px;
      height: 18px;
      color: var(--primary);
      flex-shrink: 0;
    }

    .search-box input {
      flex: 1;
      font-size: 14px;
      color: var(--text);
      background: transparent;
    }

    .search-box input::placeholder {
      color: var(--text-muted);
    }

    .nav-links {
      display: flex;
      gap: 24px;
      align-items: center;
      margin-left: auto;
    }

    .nav-links a {
      font-size: 15px;
      color: var(--dark-text-secondary);
      font-weight: 500;
      transition: color 0.2s;
      position: relative;
      padding: 6px 0;
      white-space: nowrap;
    }

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

    .nav-links a.active {
      color: var(--dark-text);
    }

    .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary-light);
      border-radius: 2px;
    }

    .nav-cta {
      height: 40px;
      padding: 0 20px;
      border-radius: var(--radius-btn);
      background: var(--accent);
      color: #fff;
      font-size: 14px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s, transform 0.2s;
      flex-shrink: 0;
      white-space: nowrap;
    }

    .nav-cta:hover {
      background: var(--accent-hover);
      transform: translateY(-1px);
    }

    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      width: 44px;
      height: 44px;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .nav-toggle span {
      width: 22px;
      height: 2px;
      background: var(--dark-text);
      border-radius: 2px;
      transition: transform 0.3s, opacity 0.3s;
    }

    .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);
    }

    /* ===== Hero ===== */
    .hero {
      background: linear-gradient(120deg, rgba(16, 42, 42, 0.88) 0%, rgba(16, 42, 42, 0.68) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      padding: 72px 0 88px;
      position: relative;
    }

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

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: rgba(240, 253, 250, 0.6);
      margin-bottom: 28px;
    }

    .breadcrumb a {
      color: rgba(240, 253, 250, 0.8);
      transition: color 0.2s;
    }

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

    .breadcrumb svg {
      width: 14px;
      height: 14px;
      color: rgba(240, 253, 250, 0.4);
    }

    .hero h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.5px;
      color: var(--dark-text);
      margin-bottom: 16px;
    }

    .hero-subtitle {
      font-size: 18px;
      line-height: 1.8;
      color: rgba(240, 253, 250, 0.85);
      max-width: 720px;
      margin-bottom: 36px;
    }

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

    .btn {
      height: 48px;
      padding: 0 32px;
      border-radius: var(--radius-btn);
      font-size: 16px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background 0.25s, transform 0.25s, border-color 0.25s, color 0.25s;
      white-space: nowrap;
    }

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

    .btn-accent:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 16px rgba(234, 88, 12, 0.3);
    }

    .btn-accent:focus-visible {
      outline: none;
      box-shadow: 0 0 0 4px var(--accent-glow);
    }

    .btn-outline-light {
      background: transparent;
      border: 2px solid rgba(255, 255, 255, 0.6);
      color: var(--dark-text);
    }

    .btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: var(--dark-text);
    }

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

    .section-alt {
      background: #fff;
    }

    .section-dark {
      background: var(--dark);
    }

    .section-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 40px;
      gap: 16px;
    }

    .section-head h2 {
      font-size: 30px;
      font-weight: 700;
      color: var(--text);
      letter-spacing: -0.3px;
      display: flex;
      align-items: center;
      gap: 12px;
      line-height: 1.3;
    }

    .section-head h2::before {
      content: "";
      width: 4px;
      height: 26px;
      background: var(--primary);
      border-radius: 2px;
      flex-shrink: 0;
    }

    .section-head .section-more {
      font-size: 14px;
      color: var(--text-secondary);
      transition: color 0.2s, transform 0.2s;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      white-space: nowrap;
    }

    .section-head .section-more:hover {
      color: var(--primary);
      transform: translateX(3px);
    }

    .section-dark .section-head h2 {
      color: var(--dark-text);
    }

    .section-dark .section-head h2::before {
      background: var(--primary-light);
    }

    .section-dark .section-head .section-more {
      color: var(--dark-text-secondary);
    }

    .section-dark .section-head .section-more:hover {
      color: var(--dark-text);
    }

    /* ===== 卡片A · 横向方案卡 ===== */
    .card-a-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .card-a {
      background: var(--card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 20px;
      display: flex;
      gap: 16px;
      box-shadow: var(--shadow-card);
      transition: box-shadow 0.3s, transform 0.3s;
    }

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

    .card-a-thumb {
      width: 120px;
      height: 96px;
      border-radius: 8px;
      object-fit: cover;
      flex-shrink: 0;
    }

    .card-a-body {
      flex: 1;
      min-width: 0;
    }

    .card-a-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-light);
      border-radius: var(--radius-badge);
      padding: 2px 12px;
      margin-bottom: 8px;
    }

    .card-a-title {
      font-size: 18px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 6px;
      line-height: 1.4;
    }

    .card-a-title a {
      transition: color 0.2s;
    }

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

    .card-a-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      margin-bottom: 10px;
    }

    .card-a-meta {
      display: flex;
      align-items: center;
      gap: 14px;
      font-size: 13px;
      color: var(--text-muted);
    }

    .card-a-meta a {
      color: var(--primary);
      font-weight: 500;
      transition: color 0.2s;
    }

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

    /* ===== 优势模块 ===== */
    .advantage-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px 40px;
    }

    .advantage-item {
      display: flex;
      gap: 16px;
      align-items: flex-start;
    }

    .advantage-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(204, 251, 241, 0.12);
      color: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .advantage-icon svg {
      width: 22px;
      height: 22px;
    }

    .advantage-item h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--dark-text);
      margin-bottom: 4px;
    }

    .advantage-item p {
      font-size: 14px;
      line-height: 1.75;
      color: var(--dark-text-secondary);
    }

    /* ===== 场景卡片 ===== */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .scenario-card {
      background: var(--card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-card);
      transition: box-shadow 0.3s, transform 0.3s;
    }

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

    .scenario-card img {
      width: 100%;
      height: 140px;
      object-fit: cover;
      border-radius: 8px;
      margin-bottom: 16px;
    }

    .scenario-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 8px;
    }

    .scenario-card p {
      font-size: 14px;
      line-height: 1.75;
      color: var(--text-secondary);
    }

    /* ===== 流程模块 ===== */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      counter-reset: step;
    }

    .process-step {
      position: relative;
      background: var(--card);
      border-radius: var(--radius-card);
      padding: 28px 24px 24px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      transition: transform 0.3s, box-shadow 0.3s;
    }

    .process-step::before {
      counter-increment: step;
      content: "0" counter(step);
      position: absolute;
      top: 18px;
      right: 20px;
      font-size: 32px;
      font-weight: 800;
      color: var(--primary-light);
      line-height: 1;
      opacity: 0.5;
    }

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

    .process-step h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 8px;
      position: relative;
      z-index: 1;
    }

    .process-step p {
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-secondary);
      position: relative;
      z-index: 1;
    }

    /* ===== FAQ ===== */
    .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-light);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: box-shadow 0.3s;
    }

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

    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 24px;
      cursor: pointer;
      background: none;
      width: 100%;
      text-align: left;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      transition: color 0.2s;
    }

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

    .faq-icon {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 400;
      flex-shrink: 0;
      transition: transform 0.3s;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.3s;
      padding: 0 24px;
      font-size: 14px;
      line-height: 1.75;
      color: var(--text-secondary);
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 20px;
      border-top-color: var(--border-light);
    }

    /* ===== 相关分类 ===== */
    .category-tags {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 14px;
    }

    .category-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 24px;
      border-radius: var(--radius-badge);
      border: 1px solid var(--border);
      background: var(--card);
      font-size: 15px;
      font-weight: 500;
      color: var(--text);
      transition: border-color 0.2s, color 0.2s, box-shadow 0.2s, transform 0.2s;
    }

    .category-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-card);
    }

    .category-tag.active {
      background: var(--primary);
      border-color: var(--primary);
      color: #fff;
    }

    .category-tag svg {
      width: 16px;
      height: 16px;
    }

    .category-tag .tag-count {
      font-size: 13px;
      color: var(--text-muted);
    }

    .category-tag.active .tag-count {
      color: rgba(255, 255, 255, 0.7);
    }

    /* ===== CTA ===== */
    .cta-section {
      background: var(--dark);
      padding: 80px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      opacity: 0.18;
    }

    .cta-inner {
      position: relative;
      z-index: 2;
    }

    .cta-inner h2 {
      font-size: 32px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }

    .cta-inner p {
      font-size: 16px;
      color: rgba(203, 213, 225, 0.85);
      margin-bottom: 32px;
    }

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

    .cta-share {
      margin-top: 32px;
      display: flex;
      justify-content: center;
      gap: 12px;
      align-items: center;
    }

    .cta-share span {
      font-size: 14px;
      color: var(--dark-text-secondary);
    }

    .share-icon {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      border: 1px solid var(--dark-border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--dark-text-secondary);
      transition: border-color 0.2s, color 0.2s, background 0.2s;
    }

    .share-icon:hover {
      border-color: var(--dark-text);
      color: var(--dark-text);
      background: rgba(255, 255, 255, 0.06);
    }

    .share-icon svg {
      width: 16px;
      height: 16px;
    }

    /* ===== 页脚 ===== */
    .site-footer {
      background: var(--dark-deep);
      padding: 72px 0 32px;
      color: var(--dark-text-secondary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.4fr;
      gap: 48px;
      margin-bottom: 48px;
    }

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

    .footer-brand p {
      font-size: 14px;
      line-height: 1.8;
      color: var(--dark-text-secondary);
      margin-bottom: 20px;
      max-width: 320px;
    }

    .footer-icp {
      font-size: 13px;
      color: rgba(203, 213, 225, 0.5);
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 600;
      color: var(--dark-text);
      margin-bottom: 18px;
    }

    .footer-col ul {
      list-style: none;
    }

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

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

    .footer-col a:hover {
      color: var(--dark-text);
    }

    .footer-contact li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
    }

    .footer-contact svg {
      width: 16px;
      height: 16px;
      color: var(--primary-light);
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1023px) {
      .header-inner {
        gap: 14px;
      }

      .search-box {
        max-width: 320px;
        margin-left: 0;
      }

      .nav-links {
        gap: 14px;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
      }

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

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

    @media (max-width: 767px) {
      .container {
        padding-left: 20px;
        padding-right: 20px;
      }

      .site-header {
        position: sticky;
      }

      .header-inner {
        height: auto;
        flex-wrap: wrap;
        padding-top: 8px;
        padding-bottom: 8px;
      }

      .search-box {
        order: 3;
        flex-basis: 100%;
        max-width: 100%;
        height: 40px;
        margin-top: 8px;
      }

      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--dark);
        flex-direction: column;
        padding: 16px 20px 20px;
        gap: 4px;
        border-top: 1px solid var(--dark-border);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
      }

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

      .nav-links a {
        padding: 12px 0;
        font-size: 16px;
        width: 100%;
      }

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

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

      .nav-cta {
        height: 36px;
        padding: 0 16px;
        font-size: 13px;
        margin-left: auto;
      }

      .nav-toggle {
        display: flex;
      }

      .hero {
        padding: 48px 0 64px;
      }

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

      .hero-subtitle {
        font-size: 16px;
      }

      .hero-actions .btn {
        height: 44px;
        font-size: 15px;
        padding: 0 24px;
      }

      .section {
        padding: var(--space-section-mobile) 0;
      }

      .section-head {
        margin-bottom: 24px;
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }

      .section-head h2 {
        font-size: 24px;
      }

      .card-a-grid {
        grid-template-columns: 1fr;
      }

      .card-a {
        flex-direction: column;
      }

      .card-a-thumb {
        width: 100%;
        height: 160px;
      }

      .advantage-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

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

      .process-steps {
        grid-template-columns: 1fr;
      }

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

      .cta-section {
        padding: 56px 0;
      }

      .cta-inner h2 {
        font-size: 26px;
      }

      .cta-inner p {
        font-size: 15px;
      }

      .cta-actions .btn {
        height: 44px;
        width: 100%;
        max-width: 280px;
      }

      .cta-share {
        flex-wrap: wrap;
      }

      .category-tag {
        padding: 8px 18px;
        font-size: 14px;
      }
    }

    @media (max-width: 520px) {
      .header-inner .nav-cta span {
        display: none;
      }

      .card-a-meta {
        flex-wrap: wrap;
        gap: 8px 14px;
      }

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

/* roulang page: category2 */
:root {
      --primary: #0F766E;
      --primary-hover: #115E59;
      --primary-light: #CCFBF1;
      --primary-glow: rgba(15,118,110,0.15);
      --accent: #EA580C;
      --accent-hover: #C2410C;
      --accent-glow: rgba(234,88,12,0.3);
      --bg-page: #F7F9F8;
      --bg-card: #FFFFFF;
      --bg-dark: #102A2A;
      --bg-darker: #0B1F1F;
      --text-main: #1F2937;
      --text-secondary: #4B5563;
      --text-muted: #9CA3AF;
      --border-color: #E8EDEB;
      --dark-text: #F0FDFA;
      --dark-secondary: #CBD5D1;
      --dark-border: rgba(255,255,255,0.10);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-badge: 999px;
      --shadow-card: 0 1px 2px rgba(16,42,42,0.06), 0 4px 12px rgba(16,42,42,0.05);
      --shadow-hover: 0 2px 4px rgba(16,42,42,0.08), 0 12px 28px rgba(16,42,42,0.10);
      --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --space-section: 96px;
      --space-section-mobile: 56px;
      --container: 1200px;
    }

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

    html { scroll-behavior: smooth; }

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

    img { max-width: 100%; display: block; }
    a { color: var(--primary); }
    button { font-family: inherit; }

    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 32px;
    }

    /* ===== 导航 ===== */
    .site-header {
      background: var(--bg-dark);
      position: sticky;
      top: 0;
      z-index: 100;
      border-bottom: 1px solid var(--dark-border);
    }

    .header-inner {
      display: flex;
      align-items: center;
      gap: 20px;
      min-height: 64px;
      padding: 12px 0;
    }

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

    .brand-badge {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: rgba(255,255,255,0.08);
      border: 1px solid var(--dark-border);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-light);
    }

    .brand-badge svg {
      width: 20px;
      height: 20px;
    }

    .brand-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark-text);
      letter-spacing: -0.2px;
    }

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

    .search-box {
      flex: 1;
      max-width: 540px;
      height: 40px;
      display: flex;
      align-items: center;
      background: var(--bg-card);
      border: 1px solid #D1D5DB;
      border-radius: var(--radius-btn);
      padding: 0 14px;
      gap: 8px;
      transition: border-color 0.2s, box-shadow 0.2s;
    }

    .search-box svg {
      width: 18px;
      height: 18px;
      color: var(--primary);
      flex-shrink: 0;
    }

    .search-box input {
      flex: 1;
      border: none;
      outline: none;
      background: transparent;
      font-size: 14px;
      color: var(--text-main);
      font-family: inherit;
    }

    .search-box input::placeholder { color: var(--text-muted); }

    .search-box:focus-within {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px var(--primary-glow);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
      flex-shrink: 0;
    }

    .nav-links a {
      color: var(--dark-secondary);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      padding: 8px 12px;
      border-radius: 6px;
      position: relative;
      transition: color 0.2s;
      white-space: nowrap;
    }

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

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

    .nav-links a.active::after {
      content: '';
      position: absolute;
      left: 12px;
      right: 12px;
      bottom: 2px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .nav-cta {
      flex-shrink: 0;
      height: 40px;
      padding: 0 20px;
      font-size: 14px;
      border-radius: var(--radius-btn);
    }

    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--dark-border);
      background: rgba(255,255,255,0.06);
      border-radius: 8px;
      color: var(--dark-text);
      align-items: center;
      justify-content: center;
      cursor: pointer;
      flex-shrink: 0;
      transition: background 0.2s;
    }

    .nav-toggle:hover { background: rgba(255,255,255,0.12); }

    .nav-toggle svg { width: 22px; height: 22px; }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 48px;
      padding: 0 32px;
      border-radius: var(--radius-btn);
      font-size: 16px;
      font-weight: 600;
      text-decoration: none;
      border: 2px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
      font-family: inherit;
      line-height: 1;
    }

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

    .btn-accent:hover {
      background: var(--accent-hover);
      border-color: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(234,88,12,0.25);
    }

    .btn-accent:focus-visible {
      outline: none;
      box-shadow: 0 0 0 3px var(--accent-glow);
    }

    .btn-outline-light {
      background: transparent;
      border-color: rgba(255,255,255,0.6);
      color: var(--dark-text);
    }

    .btn-outline-light:hover {
      background: rgba(255,255,255,0.08);
      border-color: #fff;
    }

    .btn-lg {
      height: 52px;
      padding: 0 40px;
      font-size: 17px;
    }

    .btn-sm {
      height: 40px;
      padding: 0 20px;
      font-size: 14px;
    }

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

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

    /* ===== 面包屑 ===== */
    .breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 14px;
      color: var(--dark-secondary);
      margin-bottom: 24px;
    }

    .breadcrumb a {
      color: var(--dark-secondary);
      text-decoration: none;
      transition: color 0.2s;
    }

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

    .breadcrumb .sep { color: rgba(255,255,255,0.4); }

    .breadcrumb .current { color: var(--primary-light); }

    /* ===== Hero ===== */
    .page-hero {
      background-size: cover;
      background-position: center;
      padding: 96px 0 80px;
      color: var(--dark-text);
      position: relative;
    }

    .hero-content { max-width: 720px; }

    .hero-content h1 {
      font-size: clamp(30px, 5vw, 48px);
      font-weight: 800;
      letter-spacing: -0.5px;
      line-height: 1.2;
      margin: 0 0 16px;
    }

    .hero-content p {
      font-size: 16px;
      line-height: 1.8;
      color: var(--dark-secondary);
      max-width: 620px;
      margin: 0;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      margin-top: 32px;
      flex-wrap: wrap;
    }

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

    .section-alt { background: var(--bg-card); }
    .section-dark {
      background: var(--bg-dark);
      color: var(--dark-text);
    }
    .section-thin { padding: 32px 0; }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 40px;
    }

    .section-head h2 {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: clamp(24px, 3vw, 32px);
      font-weight: 700;
      margin: 0;
      letter-spacing: -0.3px;
      line-height: 1.3;
    }

    .section-head h2::before {
      content: '';
      width: 4px;
      height: 24px;
      background: var(--primary);
      border-radius: 2px;
      flex-shrink: 0;
    }

    .section-dark .section-head h2 { color: var(--dark-text); }

    .section-more {
      font-size: 14px;
      color: var(--text-secondary);
      text-decoration: none;
      transition: color 0.2s;
      flex-shrink: 0;
    }

    .section-dark .section-more { color: var(--dark-secondary); }

    .section-more:hover { color: var(--primary); }
    .section-dark .section-more:hover { color: var(--dark-text); }

    .section-more::after {
      content: ' →';
      display: inline-block;
      transition: transform 0.2s;
    }

    .section-more:hover::after { transform: translateX(3px); }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    /* ===== 特性卡片 ===== */
    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-card);
      transition: transform 0.25s, box-shadow 0.25s;
    }

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

    .feature-icon {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

    .feature-icon svg { width: 22px; height: 22px; }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-main);
      margin: 0 0 8px;
    }

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

    /* ===== 面板（深色板块内） ===== */
    .panel {
      background: rgba(255,255,255,0.05);
      border: 1px solid var(--dark-border);
      border-radius: var(--radius-card);
      padding: 28px;
    }

    .panel h3 {
      color: var(--dark-text);
      font-size: 18px;
      font-weight: 600;
      margin: 0 0 20px;
    }

    .tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      padding: 8px 16px;
      border-radius: var(--radius-badge);
      font-size: 14px;
      font-weight: 500;
      text-decoration: none;
      transition: background 0.2s, color 0.2s;
      line-height: 1.4;
    }

    .tag-light {
      background: rgba(255,255,255,0.10);
      color: var(--dark-text);
      border: 1px solid var(--dark-border);
    }

    .tag-light:hover {
      background: rgba(255,255,255,0.18);
      color: #fff;
    }

    .tag-solid {
      background: var(--primary-light);
      color: var(--primary);
    }

    .tag-solid:hover {
      background: var(--primary);
      color: #fff;
    }

    .scene-list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 10px;
    }

    .scene-list li {
      color: var(--dark-secondary);
      font-size: 15px;
      line-height: 1.6;
      padding: 12px 16px;
      background: rgba(255,255,255,0.04);
      border-radius: 8px;
      border-left: 3px solid var(--primary);
      transition: background 0.2s;
    }

    .scene-list li:hover { background: rgba(255,255,255,0.08); }

    /* ===== 流程 ===== */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
    }

    .step {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-card);
      padding: 24px 20px;
      box-shadow: var(--shadow-card);
      position: relative;
      transition: transform 0.25s, box-shadow 0.25s;
    }

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

    .step-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      display: block;
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }

    .step h3 {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      margin: 0 0 6px;
    }

    .step p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin: 0;
    }

    /* ===== 内容列表（卡片 A） ===== */
    .content-list {
      display: grid;
      gap: 16px;
    }

    .card-h {
      display: flex;
      gap: 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-card);
      padding: 16px;
      box-shadow: var(--shadow-card);
      transition: transform 0.25s, box-shadow 0.25s;
    }

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

    .card-h img {
      width: 120px;
      height: 80px;
      object-fit: cover;
      border-radius: 8px;
      flex-shrink: 0;
    }

    .card-h-body {
      flex: 1;
      min-width: 0;
    }

    .badge {
      display: inline-block;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 12px;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: var(--radius-badge);
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .card-h-body h3 {
      font-size: 18px;
      font-weight: 600;
      margin: 0 0 6px;
      line-height: 1.4;
    }

    .card-h-body h3 a {
      color: var(--text-main);
      text-decoration: none;
      transition: color 0.2s;
    }

    .card-h-body h3 a:hover { color: var(--primary); }

    .card-h-body p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.65;
      margin: 0 0 10px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .card-h-body .meta {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* ===== 空态 ===== */
    .empty-state {
      background: var(--bg-card);
      border: 1px dashed var(--border-color);
      border-radius: var(--radius-card);
      padding: 48px 24px;
      text-align: center;
      color: var(--text-muted);
      font-size: 15px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
    }

    .empty-state svg {
      width: 40px;
      height: 40px;
      color: var(--text-muted);
      opacity: 0.5;
    }

    /* ===== 相关分类 ===== */
    .rel-cats {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-card);
      padding: 20px 24px;
      box-shadow: var(--shadow-card);
    }

    .rel-label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-right: 4px;
    }

    /* ===== FAQ ===== */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: grid;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 24px;
      border: none;
      background: none;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      text-align: left;
      transition: color 0.2s;
      font-family: inherit;
      line-height: 1.5;
    }

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

    .faq-icon {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 400;
      flex-shrink: 0;
      transition: transform 0.3s;
      line-height: 1;
    }

    .faq-item.open .faq-icon { transform: rotate(45deg); }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      border-top: 1px solid transparent;
    }

    .faq-item.open .faq-answer {
      max-height: 240px;
      border-top-color: var(--border-color);
    }

    .faq-answer p {
      margin: 0;
      padding: 16px 24px 20px;
      font-size: 14px;
      line-height: 1.7;
      color: var(--text-secondary);
    }

    /* ===== CTA ===== */
    .cta-section {
      background: var(--bg-dark);
      padding: 80px 0;
      text-align: center;
      color: var(--dark-text);
    }

    .cta-section h2 {
      font-size: clamp(24px, 3vw, 32px);
      font-weight: 700;
      margin: 0 0 12px;
      letter-spacing: -0.3px;
    }

    .cta-section p {
      color: var(--dark-secondary);
      font-size: 16px;
      margin: 0 0 32px;
      line-height: 1.7;
    }

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

    /* ===== 页脚 ===== */
    .site-footer {
      background: var(--bg-darker);
      color: var(--dark-secondary);
      padding: 64px 0 0;
      font-size: 14px;
      line-height: 1.8;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      padding-bottom: 40px;
      border-bottom: 1px solid var(--dark-border);
    }

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

    .footer-brand p {
      font-size: 14px;
      color: var(--dark-secondary);
      line-height: 1.8;
      margin: 0 0 16px;
      max-width: 320px;
    }

    .footer-icp {
      font-size: 13px;
      color: rgba(255,255,255,0.4);
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--dark-text);
      margin: 0 0 16px;
    }

    .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 8px;
    }

    .footer-col ul a {
      color: var(--dark-secondary);
      text-decoration: none;
      transition: color 0.2s;
    }

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

    .footer-contact li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: var(--dark-secondary);
    }

    .footer-contact svg {
      width: 16px;
      height: 16px;
      flex-shrink: 0;
      margin-top: 4px;
      color: var(--primary-light);
      opacity: 0.8;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1023px) {
      .header-inner {
        flex-wrap: wrap;
        gap: 12px;
      }

      .search-box {
        order: 5;
        flex-basis: 100%;
        max-width: 100%;
      }

      .nav-links {
        order: 6;
        flex-basis: 100%;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 8px 0 4px;
      }

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

      .nav-links a {
        padding: 12px 16px;
        border-radius: 8px;
        font-size: 15px;
      }

      .nav-links a.active {
        background: rgba(255,255,255,0.06);
      }

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

      .nav-toggle {
        display: inline-flex;
        order: 4;
        margin-left: auto;
      }

      .nav-cta { order: 3; }

      .grid-4 { grid-template-columns: repeat(2, 1fr); }

      .process-steps {
        grid-template-columns: repeat(3, 1fr);
      }

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

    @media (max-width: 767px) {
      :root {
        --space-section: 56px;
      }

      .container {
        padding: 0 20px;
      }

      .nav-cta { display: none; }

      .grid-4,
      .grid-2 { grid-template-columns: 1fr; }

      .process-steps { grid-template-columns: 1fr; }

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

      .page-hero {
        padding: 64px 0 56px;
      }

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

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

      .section-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }

      .card-h {
        flex-direction: column;
      }

      .card-h img {
        width: 100%;
        height: 180px;
      }

      .rel-cats {
        padding: 16px;
      }

      .faq-question {
        padding: 16px;
        font-size: 14px;
      }

      .faq-answer p {
        padding: 14px 16px 18px;
      }

      .cta-section {
        padding: 56px 0;
      }

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

    @media (max-width: 480px) {
      .brand-text { font-size: 18px; }

      .brand-badge {
        width: 32px;
        height: 32px;
      }

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

/* roulang page: category3 */
:root {
  --primary: #0F766E;
  --primary-hover: #115E59;
  --primary-light: #CCFBF1;
  --primary-focus: rgba(15, 118, 110, 0.15);
  --accent: #EA580C;
  --accent-hover: #C2410C;
  --page-bg: #F7F9F8;
  --card-bg: #FFFFFF;
  --dark: #102A2A;
  --dark-2: #0B1F1F;
  --text: #1F2937;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  --border: #E8EDEB;
  --dark-text: #F0FDFA;
  --dark-secondary: #CBD5D1;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-badge: 999px;
  --shadow-card: 0 1px 2px rgba(16,42,42,0.06), 0 4px 12px rgba(16,42,42,0.05);
  --shadow-hover: 0 2px 4px rgba(16,42,42,0.08), 0 12px 28px rgba(16,42,42,0.10);
  --space-section: 96px;
  --space-section-mobile: 56px;
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

ul,
ol {
  list-style: none;
}

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

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}

/* ===== Header / Nav ===== */
.site-header {
  background: var(--dark);
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

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

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

.brand-badge {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--dark-text);
}

.brand-badge svg {
  width: 22px;
  height: 22px;
}

.brand-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: var(--dark-text);
  white-space: nowrap;
}

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

.search-box {
  flex: 1;
  max-width: 540px;
  height: 40px;
  background: #fff;
  border-radius: var(--radius-btn);
  border: 1px solid #D1D5DB;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-focus);
}

.search-box svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex-shrink: 0;
}

.search-box input {
  width: 100%;
  height: 100%;
  font-size: 14px;
  color: var(--text);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

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

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--dark-secondary);
  padding: 4px 2px;
  position: relative;
  transition: color 0.2s;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  color: var(--dark-text);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

/* ===== Hero (Category) ===== */
.category-hero {
  background: var(--dark);
  background-image: linear-gradient(to bottom, rgba(16,42,42,0.82), rgba(16,42,42,0.94)), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  color: var(--dark-text);
  padding: 72px 0 80px;
  position: relative;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--dark-secondary);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--dark-secondary);
  transition: color 0.2s;
}

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

.breadcrumb svg {
  width: 14px;
  height: 14px;
  color: var(--dark-secondary);
}

.category-hero h1 {
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: 16px;
  max-width: 760px;
}

.category-hero .subtitle {
  font-size: 16px;
  line-height: 1.8;
  color: var(--dark-secondary);
  max-width: 680px;
  margin-bottom: 36px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 32px;
  border-radius: var(--radius-btn);
  background: var(--accent);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(234,88,12,0.25);
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(234,88,12,0.3);
  outline-offset: 2px;
}

.btn-outline-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 32px;
  border-radius: var(--radius-btn);
  background: transparent;
  border: 2px solid rgba(255,255,255,0.6);
  color: var(--dark-text);
  font-size: 16px;
  font-weight: 500;
  transition: background 0.2s, border-color 0.2s;
  cursor: pointer;
}

.btn-outline-white:hover {
  background: rgba(255,255,255,0.08);
  border-color: #fff;
}

.btn-outline-white:focus-visible {
  outline: 3px solid rgba(255,255,255,0.3);
  outline-offset: 2px;
}

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

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 44px;
}

.section-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title-bar {
  width: 4px;
  height: 24px;
  background: var(--primary);
  border-radius: 4px;
  flex-shrink: 0;
}

.section-title {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.section-more {
  font-size: 14px;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s;
}

.section-more svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s;
}

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

.section-more:hover svg {
  transform: translateX(3px);
}

/* ===== Capability cards ===== */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.cap-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s, box-shadow 0.25s;
}

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

.cap-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.cap-icon svg {
  width: 26px;
  height: 26px;
}

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

.cap-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Scenario cards ===== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s, box-shadow 0.25s;
}

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

.scenario-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.scenario-body {
  padding: 24px;
}

.scenario-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.scenario-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Process ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: process;
}

.process-item {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  border: 1px solid var(--border);
  position: relative;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s, box-shadow 0.25s;
}

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

.process-item::before {
  counter-increment: process;
  content: "0" counter(process);
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-light);
  display: block;
  margin-bottom: 16px;
}

.process-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Advantages ===== */
.adv-section {
  background: var(--dark);
  color: var(--dark-text);
  padding: var(--space-section) 0;
}

.adv-section .section-title {
  color: var(--dark-text);
}

.adv-section .section-title-bar {
  background: var(--primary-light);
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
}

.adv-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.adv-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  color: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.adv-icon svg {
  width: 20px;
  height: 20px;
}

.adv-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.adv-item p {
  font-size: 14px;
  color: var(--dark-secondary);
  line-height: 1.7;
}

/* ===== Related categories ===== */
.rel-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.rel-cat-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-badge);
  background: var(--card-bg);
  border: 1px solid var(--border);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.2s;
}

.rel-cat-link svg {
  width: 14px;
  height: 14px;
  color: var(--primary);
}

.rel-cat-link:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
  transform: translateY(-2px);
}

/* ===== FAQ ===== */
.faq-grid {
  max-width: 860px;
}

.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s;
}

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  user-select: none;
}

.faq-question .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform 0.3s;
}

.faq-question .faq-icon svg {
  width: 14px;
  height: 14px;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: 0 24px 20px;
  max-height: 400px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* ===== CTA ===== */
.cta-section {
  background: var(--dark);
  padding: var(--space-section) 0;
  text-align: center;
}

.cta-section h2 {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  color: var(--dark-text);
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 15px;
  color: var(--dark-secondary);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

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

/* ===== Footer ===== */
.site-footer {
  background: var(--dark-2);
  color: var(--dark-secondary);
  padding: 64px 0 32px;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
}

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

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--dark-secondary);
  max-width: 320px;
  margin-bottom: 20px;
}

.footer-icp {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--dark-text);
  margin-bottom: 16px;
}

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

.footer-col ul li a {
  color: var(--dark-secondary);
  transition: color 0.2s;
}

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

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.6;
}

.footer-contact svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 4px;
  color: var(--primary-light);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .nav-links {
    gap: 16px;
  }
  .cap-grid,
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .adv-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 20px;
  }
  .section {
    padding: var(--space-section-mobile) 0;
  }
  .header-inner {
    gap: 12px;
  }
  .search-box {
    order: 3;
    max-width: 100%;
    margin-top: 8px;
    height: 38px;
  }
  .site-header {
    height: auto;
    padding: 8px 0;
  }
  .header-inner {
    flex-wrap: wrap;
    height: auto;
    align-items: center;
  }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 0;
  }
  .nav-links.open {
    display: flex;
  }
  .nav-links a {
    padding: 10px 0;
    font-size: 16px;
    color: var(--dark-text);
    width: 100%;
  }
  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }
  .category-hero {
    padding: 48px 0 56px;
  }
  .category-hero h1 {
    font-size: 30px;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn-primary,
  .hero-actions .btn-outline-white {
    width: 100%;
  }
  .cap-grid,
  .scenario-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }
  .adv-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 32px;
  }
  .search-box {
    order: 3;
    width: 100%;
    max-width: 100%;
    margin-top: 8px;
  }
}

@media (max-width: 520px) {
  .cap-grid,
  .scenario-grid,
  .process-grid {
    grid-template-columns: 1fr;
  }
  .btn-primary,
  .btn-outline-white {
    height: 44px;
    padding: 0 24px;
    font-size: 15px;
  }
  .faq-question {
    padding: 16px 16px;
    font-size: 14px;
  }
  .faq-answer p {
    padding-top: 14px;
    font-size: 13px;
  }
}