/* roulang page: index */
:root{
  --brand:#1D5FD0;
  --brand-dark:#134496;
  --brand-light:#E8F0FE;
  --teal:#0EA5A0;
  --teal-light:#E6F6F5;
  --ink:#0F1B2D;
  --text:#3D4A5C;
  --muted:#6B7A90;
  --border:#E3E9F2;
  --line:#EEF2F8;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --dark:#0E1B33;
  --warn:#E8590C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --sh-sm:0 2px 8px rgba(16,42,86,.05);
  --sh-md:0 10px 28px rgba(16,42,86,.08);
  --sh-lg:0 18px 44px rgba(16,42,86,.10);
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:700;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-dark)}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.num{font-variant-numeric:tabular-nums}

/* 顶部通知条 */
.announce{
  background:var(--dark);color:rgba(255,255,255,.82);font-size:13px;
}
.announce .container{display:flex;align-items:center;gap:10px;min-height:38px;flex-wrap:wrap}
.announce .dot{width:6px;height:6px;border-radius:50%;background:var(--teal);flex:0 0 6px}
.announce a{color:#fff;text-decoration:underline;text-underline-offset:3px;margin-left:auto;font-weight:600}
.announce a:hover{color:#cfe0ff}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:1000;background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow .2s ease;
}
.site-header.scrolled{box-shadow:var(--sh-sm)}
.nav-bar{display:flex;align-items:center;gap:20px;height:72px;transition:height .2s ease}
.site-header.scrolled .nav-bar{height:64px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:28px;height:28px;border-radius:8px;background:var(--brand);position:relative;flex:0 0 28px;
}
.brand-mark::after{
  content:"";position:absolute;left:8px;top:7px;width:12px;height:15px;
  border:2px solid #fff;border-bottom:none;border-radius:6px 6px 0 0;
}
.brand-name{font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.2px;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:12px}
.nav-links a{
  position:relative;display:inline-block;padding:9px 13px;border-radius:var(--r-sm);
  font-size:15px;color:var(--text);font-weight:500;white-space:nowrap;
}
.nav-links a:hover{color:var(--brand-dark);background:var(--brand-light)}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:1px;height:2px;border-radius:2px;background:var(--brand);
}
.nav-actions{display:flex;align-items:center;gap:14px;margin-left:auto}
.nav-info{font-size:14px;color:var(--text);font-weight:500;white-space:nowrap}
.nav-info:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px}
.nav-icon-btn{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--border);
  background:#fff;align-items:center;justify-content:center;color:var(--brand);
}
.nav-icon-btn:hover{background:var(--brand-light);color:var(--brand-dark)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:10px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;line-height:1;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:var(--brand)}
.btn-ghost:hover{background:var(--brand-light);color:var(--brand-dark);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.link-more{font-size:14px;font-weight:600;color:var(--brand)}
.link-more:hover{text-decoration:underline;text-underline-offset:4px}

/* 通用板块 */
.section{padding:var(--sec) 0}
.section-tight{padding:64px 0}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:1px;
  color:var(--brand);background:var(--brand-light);padding:5px 12px;border-radius:999px;margin-bottom:14px;
}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,2.4vw,30px)}
.section-head p{margin-top:10px;font-size:15px;color:var(--muted);max-width:640px}

/* Hero */
.hero{padding:64px 0 72px;background:linear-gradient(180deg,#fff 0%,var(--bg) 100%)}
.hero-grid{display:grid;grid-template-columns:1.45fr 1fr;gap:52px;align-items:center}
.hero h1{font-size:clamp(28px,4vw,44px);line-height:1.25;letter-spacing:-.5px}
.hero-sub{margin-top:16px;font-size:18px;color:var(--text);max-width:520px}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border);flex-wrap:wrap}
.hero-stats .stat dt{font-size:24px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1.2}
.hero-stats .stat dd{margin:4px 0 0;font-size:12px;color:var(--muted)}
.hero-visual{position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-md);border:1px solid var(--border);background:#fff}
.hero-visual img{width:100%;height:100%;aspect-ratio:4/3.2;object-fit:cover}
.hero-veil{
  position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(90deg,rgba(255,255,255,.92) 0%,rgba(255,255,255,.35) 32%,rgba(255,255,255,0) 62%);
}

/* 快捷入口 */
.quick{padding:0 0 8px}
.chip-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.chip{
  display:inline-flex;align-items:center;gap:7px;height:38px;padding:0 16px;border-radius:999px;
  background:#fff;border:1px solid var(--border);font-size:14px;color:var(--text);font-weight:500;
  transition:all .18s ease;
}
.chip:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-light)}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--teal)}
.quick-scroll{display:flex;gap:18px;overflow-x:auto;padding:4px 4px 18px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.quick-scroll::-webkit-scrollbar{height:6px}
.quick-scroll::-webkit-scrollbar-thumb{background:#d7e0ee;border-radius:99px}
.quick-card{
  flex:0 0 270px;scroll-snap-align:start;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-md);padding:22px;box-shadow:var(--sh-sm);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;display:block;
}
.quick-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);border-color:#cfdcef}
.quick-card .qc-ico{
  width:40px;height:40px;border-radius:12px;background:var(--brand-light);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.quick-card h3{font-size:16px;margin-bottom:8px}
.quick-card p{font-size:13px;color:var(--muted);line-height:1.65}
.quick-card .qc-more{display:inline-block;margin-top:12px;font-size:13px;font-weight:600;color:var(--brand)}

/* 功能分组：2 列不对称 */
.blocks{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:start}
.blocks-left{display:grid;gap:24px}
.blocks-right{display:grid;gap:16px}
.big-card{
  display:grid;grid-template-columns:200px 1fr;gap:24px;align-items:center;
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh-md);transition:box-shadow .18s ease,transform .18s ease;
}
.big-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px)}
.big-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px;transition:transform .35s ease}
.big-card:hover img{transform:scale(1.03)}
.badge{
  display:inline-block;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;
  background:var(--brand-light);color:var(--brand);margin-bottom:10px;
}
.badge-teal{background:var(--teal-light);color:#0a7d79}
.big-card h3{font-size:18px;margin-bottom:8px}
.big-card p{font-size:14px;color:var(--muted);line-height:1.7}
.strip-card{
  display:flex;align-items:center;gap:16px;min-height:112px;padding:20px 22px;
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.strip-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);border-color:#cfdcef}
.strip-card .sc-ico{
  flex:0 0 40px;width:40px;height:40px;border-radius:12px;background:var(--teal-light);color:#0a7d79;
  display:inline-flex;align-items:center;justify-content:center;
}
.strip-card h3{font-size:16px;margin-bottom:4px}
.strip-card p{font-size:13px;color:var(--muted);line-height:1.6}

/* 使用场景 */
.scenes{display:grid;gap:72px}
.scene{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.scene-media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border);box-shadow:var(--sh-md);background:#fff}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.scene.reverse .scene-media{order:2}
.scene.narrow{grid-template-columns:4fr 6fr}
.scene h3{font-size:22px;margin:12px 0 10px}
.scene p{font-size:15px;color:var(--text)}
.scene ul{margin-top:18px;display:grid;gap:10px}
.scene li{position:relative;padding-left:26px;font-size:14px;color:var(--text)}
.scene li::before{
  content:"";position:absolute;left:0;top:8px;width:14px;height:8px;
  border-left:2px solid var(--teal);border-bottom:2px solid var(--teal);transform:rotate(-45deg);
}

/* 流程 */
.flow{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.flow-item{position:relative;padding:26px 22px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg)}
.flow-item .step-no{
  font-size:13px;font-weight:700;color:var(--brand);background:#fff;border:1px solid var(--border);
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;margin-bottom:16px;
}
.flow-item h3{font-size:16px;margin-bottom:8px}
.flow-item p{font-size:13px;color:var(--muted);line-height:1.7}

/* 案例 */
.case-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:start}
.case-main{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--sh-md);
  padding:24px;display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center;
}
.case-main img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px}
.case-quote{font-size:16px;color:var(--ink);line-height:1.75;font-weight:500}
.case-data{display:flex;gap:32px;margin-top:20px}
.case-data .d-num{font-size:24px;font-weight:700;color:var(--brand-dark);font-variant-numeric:tabular-nums;line-height:1.2}
.case-data .d-txt{font-size:12px;color:var(--muted)}
.case-sign{margin-top:16px;font-size:13px;color:var(--muted)}
.case-side{display:grid;gap:24px}
.case-mini{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--sh-sm);
  padding:24px;transition:box-shadow .18s ease,transform .18s ease;
}
.case-mini:hover{box-shadow:var(--sh-lg);transform:translateY(-2px)}
.case-mini .no{
  font-size:13px;font-weight:700;color:var(--teal);font-variant-numeric:tabular-nums;letter-spacing:1px;
}
.case-mini p{margin:10px 0 14px;font-size:15px;color:var(--ink);line-height:1.7}

/* 价格 */
.price-note{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:16px 22px;font-size:14px;color:var(--muted);margin-bottom:28px;
}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.price-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--r-md);
  padding:28px;box-shadow:var(--sh-md);transition:box-shadow .18s ease,transform .18s ease;
}
.price-card:hover{box-shadow:var(--sh-lg)}
.price-card.featured{border:2px solid var(--brand);transform:translateY(-8px);position:relative}
.price-card.featured:hover{transform:translateY(-10px)}
.price-card .rec{
  position:absolute;top:-13px;left:26px;background:var(--brand);color:#fff;font-size:12px;
  font-weight:600;padding:3px 12px;border-radius:999px;
}
.price-card h3{font-size:17px;margin-bottom:6px}
.price-card .p-desc{font-size:13px;color:var(--muted)}
.price-num{display:flex;align-items:baseline;gap:6px;margin:20px 0 4px}
.price-num .n{font-size:28px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1}
.price-num .u{font-size:13px;color:var(--muted)}
.price-cycle{font-size:12px;color:var(--muted);margin-bottom:20px}
.price-card ul{display:grid;gap:11px;margin-bottom:24px}
.price-card li{position:relative;padding-left:24px;font-size:14px;color:var(--text)}
.price-card li::before{
  content:"";position:absolute;left:0;top:7px;width:13px;height:7px;
  border-left:2px solid var(--teal);border-bottom:2px solid var(--teal);transform:rotate(-45deg);
}

/* 资讯 CMS */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-sm);
  transition:box-shadow .18s ease,transform .18s ease,border-color .18s ease;
}
.news-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);border-color:#cfdcef}
.news-card .nc-media{overflow:hidden}
.news-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
.news-card:hover img{transform:scale(1.03)}
.news-card .nc-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-card h3{font-size:16px;line-height:1.5;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card:hover h3{color:var(--brand-dark)}
.news-card .nc-sum{font-size:13px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .nc-meta{margin-top:auto;padding-top:14px;display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted)}
.news-card.featured{grid-column:span 2}
.news-card.featured img{aspect-ratio:16/8.4}
.news-card.featured .nc-body{padding:24px 26px 26px}
.news-card.featured h3{font-size:20px;-webkit-line-clamp:2}
.news-empty{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  background:#fff;border:1px dashed var(--border);border-radius:var(--r-md);padding:40px;text-align:center;
}
.news-empty p{font-size:15px;color:var(--muted)}

/* FAQ */
.faq-wrap{max-width:900px;margin:0 auto}
.accordion-item{
  border:1px solid var(--border);border-radius:12px;margin-bottom:12px;overflow:hidden;background:#fff;
}
.accordion-button{
  background:#fff;color:var(--ink);font-size:16px;font-weight:600;padding:18px 22px;box-shadow:none;
  transition:background .2s ease,color .2s ease;
}
.accordion-button:not(.collapsed){background:var(--bg);color:var(--brand-dark);box-shadow:none}
.accordion-button:focus{box-shadow:none;border-color:transparent}
.accordion-button::after{
  background-image:none;width:10px;height:10px;border-right:2px solid var(--muted);
  border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:transform .3s ease,border-color .3s ease;
  margin-left:auto;flex:0 0 10px;
}
.accordion-button:not(.collapsed)::after{transform:rotate(-135deg);border-color:var(--brand)}
.accordion-body{padding:4px 22px 20px;font-size:14px;color:var(--text);line-height:1.8;background:#fff}

/* CTA 反色带 */
.cta-band{background:var(--dark);color:rgba(255,255,255,.78);padding:72px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,28px)}
.cta-band p{margin-top:10px;font-size:15px;max-width:620px}
.cta-band .btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}

/* 页脚 */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px}
.footer-brand .brand-name{color:#fff}
.footer-brand p{margin-top:16px;font-size:13px;max-width:280px;line-height:1.8}
.footer-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
.footer-tags span{
  font-size:12px;padding:3px 10px;border-radius:999px;
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.78);
}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;font-weight:600}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:13px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-col p{font-size:13px;line-height:1.9}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 26px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:rgba(255,255,255,.55);
}

/* 移动底部 Tab */
.mobile-tabs{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:1100;background:#fff;
  border-top:1px solid var(--border);height:60px;padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -2px 12px rgba(16,42,86,.06);
}
.mobile-tabs ul{display:flex;height:60px}
.mobile-tabs li{flex:1}
.mobile-tabs a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:100%;font-size:10px;color:var(--muted);position:relative;
}
.mobile-tabs a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
.mobile-tabs a.active{color:var(--brand)}
.mobile-tabs a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:22px;height:2px;border-radius:2px;background:var(--brand);
}

/* 响应式 */
@media (max-width:1199px){
  .hero-grid{gap:36px}
  .blocks{grid-template-columns:1fr}
  .blocks-right{grid-template-columns:1fr 1fr;grid-column:span 1}
  .flow-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:1fr}
  .case-side{grid-template-columns:1fr 1fr}
}
@media (max-width:991px){
  :root{--sec:72px}
  .nav-links{display:none}
  .nav-actions .btn{display:none}
  .nav-actions .nav-info{display:none}
  .nav-icon-btn{display:inline-flex}
  .mobile-tabs{display:block}
  body{padding-bottom:76px}
  .hero{padding:44px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-visual img{aspect-ratio:16/9}
  .hero-stats{gap:28px;margin-top:32px}
  .price-grid{grid-template-columns:1fr}
  .price-card.featured{transform:none}
  .price-card.featured:hover{transform:translateY(-2px)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .news-card.featured{grid-column:span 2}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .scene,.scene.narrow{grid-template-columns:1fr;gap:28px}
  .scene.reverse .scene-media{order:0}
  .scenes{gap:56px}
}
@media (max-width:767px){
  :root{--sec:56px}
  .container{padding-left:16px;padding-right:16px}
  .announce{font-size:12px}
  .announce a{margin-left:0}
  .brand-name{font-size:17px}
  .hero h1{font-size:26px}
  .hero-sub{font-size:16px}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .hero-stats{gap:20px}
  .hero-stats .stat dt{font-size:20px}
  .blocks-right{grid-template-columns:1fr}
  .big-card{grid-template-columns:1fr;gap:16px;padding:20px}
  .flow-grid{grid-template-columns:1fr}
  .case-main{grid-template-columns:1fr;padding:20px}
  .case-side{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .news-card.featured{grid-column:span 1}
  .price-card,.strip-card,.quick-card{padding:20px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .section-head{margin-bottom:26px}
  .accordion-button{font-size:15px;padding:16px 18px}
  .accordion-body{padding:2px 18px 18px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
  .quick-card:hover,.big-card:hover,.strip-card:hover,.news-card:hover,.case-mini:hover,.price-card:hover{transform:none}
  .big-card:hover img,.news-card:hover img{transform:none}
}

/* roulang page: article */
:root{
  --brand:#1D5FD0;
  --brand-dark:#134496;
  --brand-soft:#E8F0FE;
  --teal:#0EA5A0;
  --teal-soft:#E6F6F5;
  --ink:#0F1B2D;
  --text:#3D4A5C;
  --muted:#6B7A90;
  --line:#E3E9F2;
  --divider:#EEF2F8;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --dark:#0E1B33;
  --warn:#E8590C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --sh-sm:0 2px 8px rgba(16,42,86,.05);
  --sh-md:0 10px 28px rgba(16,42,86,.08);
  --sh-lg:0 18px 44px rgba(16,42,86,.10);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-dark);}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;}
button{font:inherit;}
time,num,.num{font-variant-numeric:tabular-nums;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-sm);}
.nav-bar{
  display:flex;
  align-items:center;
  gap:28px;
  height:72px;
  transition:height .2s ease;
}
.site-header.is-scrolled .nav-bar{height:64px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:19px;
  color:var(--ink);
  letter-spacing:.2px;
  flex:0 0 auto;
}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:28px;height:28px;flex:0 0 28px;
  border-radius:9px;
  background:var(--brand);
  position:relative;
  display:inline-block;
}
.brand-mark::after{
  content:"";
  position:absolute;
  left:9px;top:8px;
  width:10px;height:12px;
  border:2px solid #fff;
  border-right:0;
  border-radius:4px 0 0 4px;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  list-style:none;
  margin:0;
  padding:0;
}
.nav-links a{
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--text);
  border-radius:var(--r-sm);
  position:relative;
  transition:color .18s ease,background .18s ease;
}
.nav-links a:hover{color:var(--brand);background:var(--brand-soft);}
.nav-links a.active{color:var(--brand);font-weight:600;}
.nav-links a.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:-1px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
}
.nav-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:14px;
}
.nav-info{font-size:14px;color:var(--muted);}
.nav-info:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}
.nav-icon-btn{
  display:none;
  width:40px;height:40px;
  align-items:center;justify-content:center;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--brand);
  background:#fff;
}
.nav-icon-btn:hover{background:var(--brand-soft);color:var(--brand-dark);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  font-size:15px;
  font-weight:600;
  line-height:1.4;
  border-radius:10px;
  border:1px solid transparent;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--brand);}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-dark);}
.btn-sm{padding:9px 16px;font-size:14px;}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;
  overflow:hidden;
  background:#fff;
  border-bottom:1px solid var(--line);
  padding:28px 0 44px;
}
.article-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center right;
  opacity:.4;
}
.article-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(255,255,255,.97) 0%,rgba(255,255,255,.92) 46%,rgba(255,255,255,.15) 100%);
}
.article-hero .container{position:relative;z-index:2;}
.breadcrumb-nav{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:16px;
}
.breadcrumb-nav a{color:var(--muted);}
.breadcrumb-nav a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}
.breadcrumb-nav .sep{color:#B9C4D4;}
.breadcrumb-nav .current{color:var(--muted);}
.badge-cat{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.4px;
  color:var(--brand);
  background:var(--brand-soft);
  border-radius:999px;
  padding:4px 12px;
}
.article-title{
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.3;
  letter-spacing:-.2px;
  margin:14px 0 18px;
  max-width:900px;
}
.meta-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 20px;
  font-size:13px;
  color:var(--muted);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C6D1E2;display:inline-block;}

/* ---------- layout ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,760px) 220px;
  gap:48px;
  justify-content:center;
  padding:48px 0 72px;
  align-items:start;
}
.article-main{min-width:0;}

/* ---------- toc ---------- */
.article-aside{
  position:sticky;
  top:96px;
  align-self:start;
}
.toc-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-sm);
  padding:18px 18px 14px;
}
.toc-title{
  font-size:13px;
  font-weight:600;
  letter-spacing:1px;
  color:var(--muted);
  margin-bottom:12px;
  display:block;
}
.toc-list{list-style:none;margin:0;padding:0;}
.toc-list li{margin-bottom:2px;}
.toc-list a{
  display:block;
  padding:7px 10px;
  font-size:13px;
  line-height:1.5;
  color:var(--muted);
  border-left:2px solid transparent;
  border-radius:0 6px 6px 0;
}
.toc-list a:hover{color:var(--brand);background:var(--brand-soft);}
.toc-list a.is-active{
  color:var(--brand);
  font-weight:600;
  border-left-color:var(--brand);
  background:var(--brand-soft);
}
.mobile-toc-box{
  display:none;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-sm);
  padding:14px 18px;
  margin-bottom:20px;
}
.mobile-toc-box summary{
  cursor:pointer;
  font-size:14px;
  font-weight:600;
  color:var(--ink);
  list-style:none;
}
.mobile-toc-box summary::-webkit-details-marker{display:none;}
.mobile-toc-box summary::after{content:"＋";float:right;color:var(--brand);font-weight:700;}
.mobile-toc-box[open] summary::after{content:"－";}
.mobile-toc-box ul{margin-top:10px;}

/* ---------- article body ---------- */
.article-body{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-sm);
  padding:36px 40px;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  overflow-wrap:break-word;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 16px;}
.article-body h2{
  position:relative;
  font-size:24px;
  line-height:1.35;
  font-weight:700;
  color:var(--ink);
  margin:36px 0 16px;
  padding-left:14px;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:5px;bottom:5px;
  width:4px;
  border-radius:2px;
  background:var(--brand);
}
.article-body h3{
  font-size:18px;
  line-height:1.4;
  font-weight:600;
  color:var(--ink);
  margin:28px 0 12px;
}
.article-body h4{font-size:16px;margin:20px 0 10px;color:var(--ink);}
.article-body ul,.article-body ol{margin:0 0 16px;padding-left:22px;}
.article-body li{margin-bottom:8px;line-height:1.8;}
.article-body blockquote{
  margin:20px 0;
  padding:20px;
  background:var(--bg);
  border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:12px;margin:20px 0 8px;}
.article-body figure{margin:20px 0;}
.article-body figcaption{font-size:12px;color:var(--muted);text-align:center;margin-top:6px;}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
  margin:20px 0;
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
}
.article-body th,.article-body td{
  padding:10px 14px;
  border-bottom:1px solid var(--divider);
  text-align:left;
  vertical-align:top;
}
.article-body thead th{background:var(--bg);color:var(--ink);font-weight:600;}
.article-body tbody tr:nth-child(even){background:#FAFBFE;}
.article-body code{
  background:var(--bg);
  padding:2px 6px;
  border-radius:6px;
  font-size:14px;
  color:var(--brand-dark);
}
.article-body hr{border:0;border-top:1px solid var(--divider);margin:28px 0;}

/* ---------- empty ---------- */
.empty-state{
  text-align:center;
  padding:48px 16px 40px;
}
.empty-state h2{font-size:22px;margin-bottom:12px;}
.empty-state p{font-size:15px;color:var(--muted);max-width:420px;margin:0 auto 22px;}
.empty-state .btn{margin:0 auto;}

/* ---------- cta ---------- */
.article-cta{
  margin-top:28px;
  background:var(--brand-soft);
  border-radius:var(--r-md);
  padding:24px 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
}
.article-cta h3{font-size:18px;margin-bottom:6px;}
.article-cta p{margin:0;font-size:14px;color:var(--text);}

/* ---------- related ---------- */
.related-block{margin-top:40px;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:18px;
}
.section-head h2{font-size:22px;}
.section-head a{font-size:14px;color:var(--brand);}
.section-head a:hover{text-decoration:underline;text-underline-offset:4px;}
.rel-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.rel-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-md);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease;
}
.rel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);}
.rel-thumb{
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--bg);
}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:8px;}
.rel-body h3{font-size:16px;line-height:1.45;}
.rel-card:hover .rel-body h3{color:var(--brand-dark);}
.rel-body p{font-size:13px;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.rel-tip{font-size:13px;color:var(--muted);padding:16px 0 0;}
.back-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:24px;
  font-size:14px;
  color:var(--muted);
}
.back-link:hover{color:var(--brand);text-decoration:underline;text-underline-offset:4px;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--dark);
  color:rgba(255,255,255,.72);
  padding:56px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:40px;
}
.footer-brand .brand{color:#fff;}
.footer-brand .brand:hover{color:#fff;}
.footer-brand p{
  font-size:13px;
  line-height:1.7;
  margin:14px 0 16px;
  color:rgba(255,255,255,.7);
  max-width:280px;
}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;}
.footer-tags span{
  font-size:12px;
  padding:4px 10px;
  border-radius:999px;
  background:rgba(255,255,255,.08);
  color:rgba(255,255,255,.75);
}
.footer-col h4{font-size:14px;color:#fff;margin:0 0 14px;font-weight:600;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:13px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-col p{font-size:13px;margin:0 0 8px;color:rgba(255,255,255,.72);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:18px 0;
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  font-size:12px;
  color:rgba(255,255,255,.55);
}

/* ---------- mobile tabbar ---------- */
.mobile-tabbar{display:none;}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .article-layout{grid-template-columns:minmax(0,1fr) 210px;gap:32px;}
}
@media (max-width:991.98px){
  .nav-links,.nav-info{display:none;}
  .nav-icon-btn{display:inline-flex;}
  .nav-bar{height:64px;gap:16px;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .article-aside{display:none;}
  .mobile-toc-box{display:block;}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  body{padding-bottom:76px;}
  .mobile-tabbar{
    display:flex;
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:1100;
    background:#fff;
    border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
    box-shadow:0 -6px 20px rgba(16,42,86,.06);
  }
  .tab-item{
    flex:1;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:3px;
    height:60px;
    font-size:10px;
    color:var(--muted);
    position:relative;
  }
  .tab-item svg{width:22px;height:22px;stroke-width:1.75;}
  .tab-item:hover{color:var(--brand);}
  .tab-item.is-active{color:var(--brand);font-weight:600;}
  .tab-item.is-active::before{
    content:"";
    position:absolute;
    top:0;
    width:24px;height:2px;
    border-radius:2px;
    background:var(--brand);
  }
}
@media (max-width:767.98px){
  .article-hero{padding:20px 0 32px;}
  .article-body{padding:24px 20px;font-size:16px;}
  .article-body h2{font-size:21px;}
  .article-layout{padding:28px 0 48px;}
  .rel-grid{grid-template-columns:minmax(0,1fr);}
  .article-cta{padding:22px 20px;flex-direction:column;align-items:flex-start;}
  .article-cta .btn{width:100%;}
  .section-head h2{font-size:19px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;}
  .brand{font-size:17px;}
  .meta-row{font-size:12px;}
  .article-body{padding:20px 16px;}
  .article-body h2{font-size:20px;margin-top:28px;}
  .article-body h3{font-size:17px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .rel-card:hover{transform:none;}
  .btn:hover{transform:none;}
}

/* roulang page: category1 */
:root{
  --brand:#1D5FD0;
  --brand-deep:#134496;
  --brand-soft:#E8F0FE;
  --teal:#0EA5A0;
  --teal-soft:#E6F6F5;
  --ink:#0F1B2D;
  --body:#3D4A5C;
  --muted:#6B7A90;
  --line:#E3E9F2;
  --divider:#EEF2F8;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --dark:#0E1B33;
  --warn:#E8590C;
  --r-s:8px;
  --r-m:14px;
  --r-l:18px;
  --r-btn:10px;
  --sh-sm:0 2px 8px rgba(16,42,86,.05);
  --sh-md:0 10px 28px rgba(16,42,86,.08);
  --sh-lg:0 18px 44px rgba(16,42,86,.10);
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--body);
  background:var(--bg);
  padding-bottom:0;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand-deep);}
h1,h2,h3,h4,h5{color:var(--ink);margin:0;font-weight:700;letter-spacing:.2px;}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.num{font-variant-numeric:tabular-nums;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),height var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-sm);}
.nav-bar{
  height:72px;
  display:flex;
  align-items:center;
  gap:24px;
  transition:height var(--ease);
}
.site-header.is-scrolled .nav-bar{height:64px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:28px;
  height:28px;
  border-radius:8px;
  background:linear-gradient(160deg,var(--brand),var(--brand-deep));
  position:relative;
  flex-shrink:0;
}
.brand-mark::before{
  content:"";
  position:absolute;
  left:9px;
  top:6px;
  width:10px;
  height:16px;
  border:2px solid #fff;
  border-right:none;
  border-radius:4px 0 0 4px;
}
.brand-mark::after{
  content:"";
  position:absolute;
  right:7px;
  top:13px;
  width:7px;
  height:2px;
  background:#fff;
  border-radius:2px;
}
.brand-name{
  font-size:19px;
  font-weight:700;
  color:var(--ink);
  letter-spacing:.4px;
  white-space:nowrap;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:8px;
  flex:1;
}
.nav-links li{position:relative;}
.nav-links a{
  display:inline-flex;
  align-items:center;
  height:72px;
  padding:0 12px;
  font-size:15px;
  color:var(--body);
  position:relative;
  transition:color var(--ease);
}
.site-header.is-scrolled .nav-links a{height:64px;}
.nav-links a::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:0;
  height:2px;
  border-radius:2px;
  background:transparent;
  transition:background var(--ease);
}
.nav-links a:hover{color:var(--brand-deep);}
.nav-links a.active{color:var(--brand);font-weight:600;}
.nav-links a.active::after{background:var(--brand);}
.nav-actions{
  display:flex;
  align-items:center;
  gap:14px;
  flex-shrink:0;
}
.nav-info{
  font-size:14px;
  color:var(--muted);
}
.nav-info:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px;}
.nav-icon-btn{
  display:none;
  width:44px;
  height:44px;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  color:var(--body);
  border:1px solid var(--line);
  background:#fff;
}
.nav-icon-btn:hover{background:var(--brand-soft);color:var(--brand-deep);border-color:var(--brand-soft);}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-primary{
  background-color:var(--brand);
  border-color:var(--brand);
  color:#fff;
  box-shadow:0 6px 16px rgba(29,95,208,.22);
}
.btn-primary:hover,
.btn-primary:focus{
  background-color:var(--brand-deep);
  border-color:var(--brand-deep);
  color:#fff;
  transform:translateY(-1px);
}
.btn-primary:active{background-color:#0f3878;border-color:#0f3878;transform:translateY(0);}
.btn-outline{
  background-color:#fff;
  border-color:var(--brand);
  color:var(--brand);
}
.btn-outline:hover,
.btn-outline:focus{
  background-color:var(--brand-soft);
  border-color:var(--brand);
  color:var(--brand-deep);
  transform:translateY(-1px);
}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:9px;}
.btn-block{width:100%;}
.btn-ghost-light{
  background-color:transparent;
  border-color:rgba(255,255,255,.5);
  color:#fff;
}
.btn-ghost-light:hover{background-color:rgba(255,255,255,.12);border-color:#fff;color:#fff;}

/* ============ 页面主体 ============ */
main{display:block;}
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
.section-alt{background:#fff;}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:1px;
  font-weight:600;
  color:var(--brand);
  margin-bottom:10px;
}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{
  font-size:29px;
  line-height:1.3;
  margin-bottom:14px;
}
.section-head p{color:var(--muted);font-size:15px;margin:0;}

/* ============ 面包屑 ============ */
.breadcrumb-bar{
  font-size:13px;
  color:var(--muted);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
}
.breadcrumb-bar a{color:var(--body);}
.breadcrumb-bar a:hover{color:var(--brand-deep);text-decoration:underline;text-underline-offset:4px;}
.breadcrumb-bar .sep{color:#B9C4D4;}
.breadcrumb-bar .current{color:var(--muted);}

/* ============ 矮版 Hero ============ */
.hero-short{
  position:relative;
  background-color:#E9EFFA;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.hero-short::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(255,255,255,.96) 0%,rgba(255,255,255,.86) 46%,rgba(255,255,255,.35) 100%);
}
.hero-short .container{position:relative;z-index:2;}
.hero-inner{
  padding:52px 0 56px;
  max-width:760px;
}
.hero-inner h1{
  font-size:clamp(28px,4vw,42px);
  line-height:1.25;
  margin:14px 0 16px;
}
.hero-inner h1 em{
  font-style:normal;
  color:var(--brand);
}
.hero-desc{
  font-size:16px;
  color:var(--body);
  max-width:620px;
  margin-bottom:24px;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  font-size:13px;
  border-radius:999px;
  background:var(--brand-soft);
  color:var(--brand-deep);
  font-weight:500;
}
.chip-teal{background:var(--teal-soft);color:#0B7C78;}

/* ============ 指引布局 ============ */
.guide-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 330px;
  gap:44px;
  align-items:start;
}
.guide-main .block + .block{margin-top:56px;}

/* 时间线 */
.timeline{
  position:relative;
  margin-top:8px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:20px;
  top:12px;
  bottom:34px;
  width:2px;
  background:linear-gradient(180deg,var(--brand) 0%,rgba(29,95,208,.18) 100%);
  border-radius:2px;
}
.step{
  position:relative;
  padding-left:60px;
  padding-bottom:30px;
}
.step:last-child{padding-bottom:0;}
.step-num{
  position:absolute;
  left:0;
  top:0;
  width:42px;
  height:42px;
  border-radius:50%;
  display:grid;
  place-items:center;
  background:var(--brand-soft);
  color:var(--brand-deep);
  font-weight:700;
  font-size:16px;
  border:3px solid #fff;
  box-shadow:0 0 0 1px var(--line);
  font-variant-numeric:tabular-nums;
}
.step h3{
  font-size:18px;
  margin-bottom:8px;
  line-height:1.4;
}
.step p{
  font-size:15px;
  margin:0;
  color:var(--body);
}
.step-note{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:10px;
  font-size:12.5px;
  color:var(--warn);
  background:#FDF0E8;
  border-radius:999px;
  padding:4px 12px;
}

/* 速查卡 */
.quick-card{
  position:sticky;
  top:96px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  box-shadow:var(--sh-md);
  padding:26px 24px;
}
.quick-card h3{
  font-size:17px;
  margin-bottom:6px;
}
.quick-card .quick-sub{
  font-size:13px;
  color:var(--muted);
  margin-bottom:18px;
}
.quick-list li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  padding:11px 0;
  border-bottom:1px dashed var(--divider);
  font-size:14px;
  color:var(--body);
}
.quick-list li:last-child{border-bottom:none;}
.quick-list .dot{
  flex-shrink:0;
  width:18px;
  height:18px;
  margin-top:3px;
  border-radius:50%;
  background:var(--teal-soft);
  display:grid;
  place-items:center;
}
.quick-list .dot svg{width:11px;height:11px;stroke:var(--teal);}
.quick-actions{margin-top:20px;display:grid;gap:10px;}
.quick-link{
  font-size:13px;
  color:var(--muted);
  text-align:center;
}
.quick-link a{color:var(--brand);font-weight:600;}
.quick-link a:hover{text-decoration:underline;text-underline-offset:4px;}

/* 准备事项卡 */
.prep-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.prep-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  box-shadow:var(--sh-md);
  padding:24px;
  transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.prep-card:hover{
  box-shadow:var(--sh-lg);
  transform:translateY(-2px);
  border-color:#D3E0F5;
}
.icon-box{
  width:40px;
  height:40px;
  border-radius:12px;
  background:var(--brand-soft);
  display:grid;
  place-items:center;
  margin-bottom:16px;
}
.icon-box svg{width:20px;height:20px;stroke:var(--brand);}
.icon-box.teal{background:var(--teal-soft);}
.icon-box.teal svg{stroke:var(--teal);}
.prep-card h3{font-size:16.5px;margin-bottom:8px;}
.prep-card p{font-size:14px;color:var(--body);margin:0;}

/* 设备差异 */
.device-block{
  display:grid;
  grid-template-columns:5fr 6fr;
  gap:36px;
  align-items:center;
}
.device-figure{
  position:relative;
  border-radius:var(--r-l);
  overflow:hidden;
  box-shadow:var(--sh-md);
  border:1px solid var(--line);
  background:var(--brand-soft);
}
.device-figure img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  transition:transform 320ms ease;
}
.device-figure:hover img{transform:scale(1.02);}
.device-list li{
  display:flex;
  gap:14px;
  padding:16px 0;
  border-bottom:1px solid var(--divider);
}
.device-list li:last-child{border-bottom:none;padding-bottom:0;}
.device-list .tag{
  flex-shrink:0;
  min-width:64px;
  height:28px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:var(--r-s);
  background:var(--brand-soft);
  color:var(--brand-deep);
  font-size:13px;
  font-weight:600;
  margin-top:2px;
}
.device-list h4{font-size:15.5px;margin-bottom:4px;font-weight:600;}
.device-list p{font-size:14px;margin:0;}

/* 排查顺序 */
.check-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:16px;
}
.check-item{
  display:flex;
  gap:14px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:20px;
  box-shadow:var(--sh-sm);
  transition:box-shadow var(--ease),transform var(--ease);
}
.check-item:hover{box-shadow:var(--sh-md);transform:translateY(-2px);}
.check-item .k{
  flex-shrink:0;
  width:30px;
  height:30px;
  border-radius:9px;
  background:var(--bg);
  border:1px solid var(--line);
  color:var(--brand-deep);
  font-size:13px;
  font-weight:700;
  display:grid;
  place-items:center;
  font-variant-numeric:tabular-nums;
}
.check-item h4{font-size:15.5px;margin-bottom:4px;font-weight:600;}
.check-item p{font-size:13.5px;margin:0;color:var(--body);}
.check-item.warn .k{background:#FDF0E8;border-color:#F6D6C2;color:var(--warn);}

/* FAQ */
.faq-wrap{max-width:860px;}
.accordion-item{
  border:1px solid var(--line);
  border-radius:12px;
  background:#fff;
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:var(--sh-sm);
}
.accordion-item:last-child{margin-bottom:0;}
.accordion-button{
  width:100%;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  background:#fff;
  border:0;
  padding:18px 52px 18px 20px;
  box-shadow:none !important;
  position:relative;
  transition:background-color var(--ease),color var(--ease);
}
.accordion-button:not(.collapsed){
  background:var(--bg);
  color:var(--brand-deep);
}
.accordion-button:hover{background:#FAFBFE;}
.accordion-button:focus{outline:2px solid var(--brand);outline-offset:-2px;}
.accordion-button::after{
  content:"";
  position:absolute;
  right:20px;
  top:50%;
  width:16px;
  height:16px;
  margin:0;
  transform:translateY(-50%);
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%233D4A5C' d='M8 11.2 2.4 5.6l1.1-1.1L8 9l4.5-4.5 1.1 1.1z'/%3E%3C/svg%3E");
  background-size:16px 16px;
  background-repeat:no-repeat;
  transition:transform 300ms ease;
}
.accordion-button:not(.collapsed)::after{
  transform:translateY(-50%) rotate(180deg);
}
.accordion-body{
  padding:0 20px 20px;
  font-size:14.5px;
  color:var(--body);
  background:var(--bg);
}

/* CTA 带 */
.cta-band{
  background:var(--dark);
  color:#fff;
  padding:64px 0;
}
.cta-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
}
.cta-inner h2{
  color:#fff;
  font-size:26px;
  margin-bottom:8px;
}
.cta-inner p{
  color:rgba(255,255,255,.72);
  font-size:14.5px;
  margin:0;
  max-width:560px;
}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--dark);
  color:rgba(255,255,255,.72);
  padding:64px 0 28px;
  font-size:13px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand .brand-name{color:#fff;}
.footer-brand p{
  font-size:13px;
  color:rgba(255,255,255,.66);
  margin:16px 0 18px;
  max-width:260px;
  line-height:1.7;
}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;}
.footer-tags span{
  font-size:12px;
  padding:4px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.08);
  color:rgba(255,255,255,.78);
}
.footer-col h4{
  color:#fff;
  font-size:14px;
  font-weight:600;
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{
  color:rgba(255,255,255,.72);
  font-size:13px;
}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.footer-col p{
  color:rgba(255,255,255,.66);
  font-size:13px;
  margin-bottom:8px;
  line-height:1.7;
}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  padding-top:22px;
  font-size:12.5px;
  color:rgba(255,255,255,.52);
}

/* ============ 移动端底部 Tab ============ */
.mobile-tab{
  display:none;
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:1040;
  height:60px;
  background:#fff;
  border-top:1px solid var(--line);
  box-shadow:0 -4px 16px rgba(16,42,86,.06);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab ul{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  height:60px;
}
.mobile-tab a{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:10px;
  color:var(--muted);
  position:relative;
  min-height:44px;
}
.mobile-tab a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.75;}
.mobile-tab a.active{color:var(--brand);font-weight:600;}
.mobile-tab a.active::before{
  content:"";
  position:absolute;
  top:0;
  left:50%;
  transform:translateX(-50%);
  width:26px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .guide-layout{grid-template-columns:minmax(0,1fr) 300px;gap:32px;}
}
@media (max-width:991px){
  .nav-links{display:none;}
  .nav-info{display:none;}
  .nav-icon-btn{display:inline-flex;}
  .nav-bar{height:64px;justify-content:space-between;}
  .site-header.is-scrolled .nav-bar{height:60px;}
  .section{padding:72px 0;}
  .section-tight{padding:56px 0;}
  .guide-layout{grid-template-columns:1fr;gap:36px;}
  .quick-card{position:static;}
  .prep-grid{grid-template-columns:1fr;}
  .device-block{grid-template-columns:1fr;gap:24px;}
  .check-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .mobile-tab{display:block;}
  body{padding-bottom:76px;}
  .hero-inner{padding:40px 0 44px;}
  .section-head h2{font-size:25px;}
}
@media (max-width:575px){
  .container{padding-left:16px;padding-right:16px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .hero-inner h1{font-size:27px;}
  .hero-desc{font-size:15px;}
  .step{padding-left:52px;padding-bottom:26px;}
  .step-num{width:36px;height:36px;font-size:14px;}
  .timeline::before{left:17px;}
  .prep-card,.quick-card{padding:20px;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .breadcrumb-bar{font-size:12px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  .prep-card:hover,.check-item:hover,.device-figure:hover img{transform:none;}
}

/* roulang page: category2 */
:root{
  --primary:#1D5FD0;
  --primary-dark:#134496;
  --primary-light:#E8F0FE;
  --teal:#0EA5A0;
  --teal-light:#E6F6F5;
  --ink:#0F1B2D;
  --body:#3D4A5C;
  --muted:#6B7A90;
  --line:#E3E9F2;
  --divider:#EEF2F8;
  --bg:#F6F8FC;
  --dark:#0E1B33;
  --warn:#E8590C;
  --warn-light:#FDF1E9;
  --warn-line:#F5D3BE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --sh-sm:0 2px 8px rgba(16,42,86,.05);
  --sh-md:0 10px 28px rgba(16,42,86,.08);
  --sh-lg:0 18px 44px rgba(16,42,86,.10);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--body);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease,background-color .18s ease;}
a:hover{color:var(--primary-dark);}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3;}
p{margin:0 0 12px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}
.section-alt{background:#fff;}
.sect-label{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:1px;
  color:var(--primary);margin-bottom:10px;
}
.sect-head{max-width:720px;margin-bottom:36px;}
.sect-head h2{font-size:clamp(23px,2.6vw,30px);letter-spacing:.2px;}
.sect-head p{margin-top:12px;font-size:16px;color:var(--muted);}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;background:#fff;
  border-bottom:1px solid var(--line);transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-sm);}
.nav-bar{
  display:flex;align-items:center;gap:20px;height:72px;
  transition:height .22s ease;
}
.site-header.is-scrolled .nav-bar{height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;}
.brand:hover{color:var(--ink);}
.brand-mark{
  position:relative;width:28px;height:28px;border-radius:9px;
  background:linear-gradient(180deg,var(--primary) 0%,var(--primary-dark) 100%);
  flex:0 0 auto;
}
.brand-mark::before{
  content:"";position:absolute;left:8px;top:6px;width:12px;height:14px;
  border:2px solid #fff;border-bottom:none;border-radius:6px 6px 0 0;
}
.brand-mark::after{
  content:"";position:absolute;left:13px;top:12px;width:2px;height:10px;
  background:#fff;border-radius:1px;
}
.brand-name{font-size:19px;font-weight:700;letter-spacing:.2px;}
.nav-links{display:flex;align-items:center;gap:2px;margin:0 auto 0 12px;}
.nav-links a{
  display:block;padding:8px 13px;font-size:15px;color:var(--body);
  border-radius:8px;position:relative;
}
.nav-links a:hover{color:var(--primary-dark);background:var(--primary-light);}
.nav-links a.active{color:var(--primary);font-weight:600;}
.nav-links a.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:-1px;height:2px;
  background:var(--primary);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:14px;}
.nav-info{font-size:14px;color:var(--muted);}
.nav-info:hover{color:var(--primary);}
.nav-icon-btn{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--primary);
}
.nav-icon-btn:hover{background:var(--primary-light);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;white-space:nowrap;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{background:#fff;color:var(--primary);border-color:var(--primary);}
.btn-outline:hover{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary-dark);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px;}
.btn-light-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.5);}
.btn-light-outline:hover{background:#fff;color:var(--dark);border-color:#fff;}
.link-arrow{font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;}
.link-arrow:hover{text-decoration:underline;text-underline-offset:4px;}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;background:#fff;
  border-bottom:1px solid var(--divider);
  padding:34px 0 44px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.webp") no-repeat right center;
  background-size:cover;opacity:.55;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,#fff 0%,#fff 52%,rgba(255,255,255,.72) 100%);
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb-nav{
  display:flex;flex-wrap:wrap;align-items:center;gap:7px;
  font-size:13px;color:var(--muted);margin-bottom:14px;
}
.breadcrumb-nav a{color:var(--muted);}
.breadcrumb-nav a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:3px;}
.breadcrumb-nav .sep{color:#C6D1E0;}
.breadcrumb-nav .current{color:var(--muted);}
.page-hero h1{font-size:clamp(26px,3.6vw,42px);line-height:1.25;letter-spacing:.2px;max-width:840px;}
.page-hero .hero-desc{
  margin-top:16px;max-width:700px;font-size:16px;color:var(--body);
}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-light);border-radius:999px;padding:5px 14px;
}
.chip-teal{color:#0B7F7B;background:var(--teal-light);}
.chip-warn{color:var(--warn);background:var(--warn-light);}

/* ---------- 布局 ---------- */
.two-col{display:grid;grid-template-columns:minmax(0,1fr) 344px;gap:44px;align-items:start;}
.side-sticky{position:sticky;top:96px;}

/* ---------- 风险条目 ---------- */
.risk-item{padding-bottom:28px;margin-bottom:28px;border-bottom:1px solid var(--divider);}
.risk-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0;}
.tag-warn{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.4px;
  color:var(--warn);background:var(--warn-light);
  border:1px solid var(--warn-line);border-radius:999px;padding:2px 11px;
  margin-bottom:10px;
}
.risk-item h3{font-size:19px;margin-bottom:10px;}
.risk-item p{font-size:15.5px;color:var(--body);}
.dot-list{margin-top:12px;}
.dot-list li{
  position:relative;padding-left:20px;font-size:15px;color:var(--body);
  margin-bottom:8px;
}
.dot-list li::before{
  content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;
  border-radius:2px;background:var(--primary);transform:rotate(45deg);
}
.dot-list li:last-child{margin-bottom:0;}

/* ---------- 侧栏检查清单 ---------- */
.check-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-md);padding:26px 24px;
}
.check-card h3{font-size:17px;margin-bottom:6px;}
.check-card .sub{font-size:13px;color:var(--muted);margin-bottom:16px;}
.check-list li{
  display:flex;gap:10px;align-items:flex-start;
  padding:11px 0;border-bottom:1px dashed var(--divider);
  font-size:14px;line-height:1.6;color:var(--body);
}
.check-list li:last-child{border-bottom:none;padding-bottom:0;}
.check-box{
  position:relative;flex:0 0 auto;width:18px;height:18px;margin-top:4px;
  border:1.6px solid var(--primary);border-radius:5px;background:var(--primary-light);
}
.check-box::after{
  content:"";position:absolute;left:4px;top:1px;width:6px;height:10px;
  border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);
  transform:rotate(42deg);
}
.check-actions{margin-top:18px;}
.check-actions .btn{width:100%;}

/* ---------- 指标带 ---------- */
.metric-band{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-sm);
}
.metric-item{background:#fff;padding:22px 24px;}
.metric-item .value{
  font-size:24px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.metric-item .value span{font-size:14px;font-weight:600;color:var(--muted);margin-left:3px;}
.metric-item .label{font-size:12.5px;color:var(--muted);margin-top:6px;}

/* ---------- 步骤卡 ---------- */
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.step-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-md);padding:26px 24px;
  transition:box-shadow .18s ease,transform .18s ease;
}
.step-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px);}
.step-no{
  width:34px;height:34px;border-radius:10px;background:var(--primary-light);
  color:var(--primary);font-weight:700;font-size:14px;
  display:inline-flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.step-card h3{font-size:17px;margin-bottom:8px;}
.step-card p{font-size:14.5px;color:var(--muted);}

/* ---------- 图文块 ---------- */
.split-block{display:grid;grid-template-columns:5fr 6fr;gap:44px;align-items:center;}
.split-media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-md);background:var(--divider);}
.split-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11;}
.split-text h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:14px;}
.split-text p{font-size:15.5px;}
.split-text .dot-list{margin-top:16px;}

/* ---------- FAQ ---------- */
.faq-acc .accordion-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-sm);
}
.faq-acc .accordion-item:last-child{margin-bottom:0;}
.faq-acc .accordion-button{
  width:100%;padding:18px 22px;font-size:16px;font-weight:600;color:var(--ink);
  background:#fff;box-shadow:none;border:none;border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;transition:background-color .18s ease,color .18s ease;
}
.faq-acc .accordion-button::after{
  content:"";flex:0 0 auto;width:9px;height:9px;margin-left:auto;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:rotate(45deg);transition:transform .3s ease,border-color .18s ease;
  background:none;
}
.faq-acc .accordion-button:not(.collapsed){background:#F6F8FC;color:var(--primary-dark);}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);border-color:var(--primary);}
.faq-acc .accordion-button:focus{box-shadow:none;outline:2px solid var(--primary);outline-offset:-2px;}
.faq-acc .accordion-body{
  padding:4px 22px 22px;font-size:15px;color:var(--body);line-height:1.8;
  background:#F6F8FC;
}
.faq-acc .accordion-body p{margin:0 0 10px;}
.faq-acc .accordion-body p:last-child{margin-bottom:0;}

/* ---------- CTA 带 ---------- */
.cta-band{
  background:var(--dark);border-radius:var(--r-lg);
  border-left:4px solid var(--warn);
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;
  gap:36px;box-shadow:var(--sh-lg);
}
.cta-band h2{color:#fff;font-size:clamp(21px,2.3vw,26px);}
.cta-band p{color:rgba(255,255,255,.76);font-size:15px;margin-top:10px;max-width:620px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 28px;margin-top:96px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;}
.footer-brand .brand{color:#fff;}
.footer-brand .brand-name{color:#fff;font-size:18px;}
.footer-brand .brand-mark{background:#fff;}
.footer-brand .brand-mark::before{border-color:var(--dark);}
.footer-brand .brand-mark::after{background:var(--dark);}
.footer-brand p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.72);margin-top:16px;max-width:300px;}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.footer-tags span{
  font-size:12px;color:rgba(255,255,255,.78);
  border:1px solid rgba(255,255,255,.22);border-radius:999px;padding:3px 11px;
}
.footer-col h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{font-size:13.5px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.footer-col p{font-size:13.5px;color:rgba(255,255,255,.72);margin-bottom:8px;}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:rgba(255,255,255,.55);
}

/* ---------- 移动底部 Tab ---------- */
.mobile-tab{display:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .two-col{grid-template-columns:minmax(0,1fr) 320px;gap:36px;}
}
@media (max-width:991.98px){
  .nav-links{display:none;}
  .nav-info{display:none;}
  .nav-bar{height:64px;justify-content:space-between;gap:12px;}
  .nav-actions .btn{display:none;}
  .nav-icon-btn{display:inline-flex;}
  .section{padding:72px 0;}
  .section-tight{padding:52px 0;}
  .two-col{grid-template-columns:1fr;gap:32px;}
  .side-sticky{position:static;}
  .step-grid{grid-template-columns:1fr;}
  .split-block{grid-template-columns:1fr;gap:26px;}
  .metric-band{grid-template-columns:repeat(2,1fr);}
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .site-footer{margin-top:72px;padding-bottom:24px;}
  .mobile-tab{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:1040;
    background:#fff;border-top:1px solid var(--line);
    height:60px;padding-bottom:env(safe-area-inset-bottom);
    box-shadow:0 -6px 20px rgba(16,42,86,.06);
  }
  .mobile-tab a{
    flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:3px;font-size:10px;color:var(--muted);position:relative;min-height:44px;
  }
  .mobile-tab a svg{width:22px;height:22px;}
  .mobile-tab a.active{color:var(--primary);font-weight:600;}
  .mobile-tab a.active::before{
    content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
    width:22px;height:2px;background:var(--primary);border-radius:2px;
  }
  body{padding-bottom:calc(60px + env(safe-area-inset-bottom));}
}
@media (max-width:767.98px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .page-hero{padding:26px 0 34px;}
  .page-hero::before{opacity:.35;}
  .page-hero .hero-desc{font-size:15px;}
  .hero-meta{gap:8px;}
  .metric-band{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .btn{height:46px;}
  .btn-sm{height:40px;}
  .cta-band{padding:28px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .split-media img{aspect-ratio:16/9;}
}
@media (max-width:575.98px){
  .brand-name{font-size:17px;}
  .page-hero h1{font-size:26px;}
  .check-card{padding:22px 18px;}
  .step-card{padding:22px 18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .step-card:hover{transform:none;}
  .btn-primary:hover{transform:none;}
}

/* roulang page: category3 */
:root{
  --brand:#1D5FD0;
  --brand-dark:#134496;
  --brand-light:#E8F0FE;
  --teal:#0EA5A0;
  --teal-light:#E6F6F5;
  --ink:#0F1B2D;
  --text:#3D4A5C;
  --muted:#6B7A90;
  --line:#E3E9F2;
  --divider:#EEF2F8;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --dark:#0E1B33;
  --warn:#E8590C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-sm:0 2px 8px rgba(16,42,86,.05);
  --sh-md:0 10px 28px rgba(16,42,86,.08);
  --sh-lg:0 18px 44px rgba(16,42,86,.10);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--brand-dark)}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:700;line-height:1.3}
p{margin:0 0 12px}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px;width:100%}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-sm)}
.nav-bar{
  display:flex;
  align-items:center;
  gap:28px;
  height:72px;
  transition:height .2s ease;
}
.site-header.is-scrolled .nav-bar{height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto}
.brand-mark{
  width:28px;height:28px;border-radius:8px;background:var(--brand);
  position:relative;flex:0 0 28px;
}
.brand-mark::after{
  content:"";position:absolute;left:9px;right:9px;top:8px;bottom:6px;
  border:2px solid #fff;border-bottom:none;border-radius:3px 3px 0 0;
}
.brand-name{font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.2px}
.nav-links{display:flex;align-items:center;gap:4px;flex:1 1 auto;margin:0;padding:0}
.nav-links a{
  display:inline-flex;align-items:center;height:40px;padding:0 12px;
  border-radius:var(--r-sm);color:var(--text);font-size:15px;
  position:relative;white-space:nowrap;
}
.nav-links a:hover{background:var(--brand-light);color:var(--brand-dark)}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.nav-info{font-size:14px;color:var(--muted)}
.nav-info:hover{color:var(--brand-dark);text-decoration:underline;text-underline-offset:4px}
.nav-icon-btn{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--line);color:var(--brand);background:var(--surface);
}
.nav-icon-btn:hover{background:var(--brand-light);color:var(--brand-dark)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:10px;
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:var(--r-sm)}
.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-primary:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:var(--surface);color:var(--brand);border-color:var(--brand)}
.btn-outline:hover{background:var(--brand-light);color:var(--brand-dark);border-color:var(--brand-dark)}
.btn-ghost{background:transparent;color:var(--brand);border-color:transparent;padding:0 6px;height:auto}
.btn-ghost:hover{text-decoration:underline;text-underline-offset:4px;color:var(--brand-dark)}
.btn-block{width:100%}

/* ---------- page hero ---------- */
.page-hero{
  background:var(--surface);
  border-bottom:1px solid var(--line);
  padding:32px 0 40px;
}
.breadcrumb-line{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);margin-bottom:14px;
}
.breadcrumb-line a{color:var(--muted)}
.breadcrumb-line a:hover{color:var(--brand-dark)}
.breadcrumb-line .sep{color:#C3CDDC}
.breadcrumb-line .current{color:var(--muted)}
.page-hero h1{
  font-size:clamp(26px,3.4vw,36px);
  line-height:1.28;
  margin-bottom:12px;
}
.page-hero .lead-line{
  font-size:16px;color:var(--text);max-width:760px;
}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;
}
.hero-fact{
  display:flex;flex-direction:column;gap:2px;
  background:var(--bg);border:1px solid var(--line);
  border-radius:var(--r-md);padding:12px 18px;min-width:150px;
}
.hero-fact strong{
  font-size:18px;color:var(--ink);font-weight:700;
  font-variant-numeric:tabular-nums;line-height:1.3;
}
.hero-fact span{font-size:12px;color:var(--muted)}

/* ---------- sections ---------- */
.section{padding:72px 0}
.section-tight{padding:56px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--divider);border-bottom:1px solid var(--divider)}
.section-head{max-width:760px;margin-bottom:32px}
.section-label{
  display:inline-block;font-size:12px;letter-spacing:1px;
  color:var(--brand);font-weight:600;margin-bottom:10px;
}
.section-head h2{font-size:clamp(23px,2.6vw,29px);margin-bottom:12px}
.section-head p{font-size:15px;color:var(--muted)}

/* ---------- version cards ---------- */
.version-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;
}
.version-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:26px;
  box-shadow:var(--sh-md);
  transition:box-shadow .18s ease,transform .18s ease;
  display:flex;flex-direction:column;gap:16px;
}
.version-card:hover{box-shadow:var(--sh-lg);transform:translateY(-2px)}
.version-head{display:flex;align-items:center;gap:12px}
.icon-box{
  width:40px;height:40px;border-radius:12px;
  background:var(--brand-light);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 40px;
}
.icon-box.teal{background:var(--teal-light);color:var(--teal)}
.version-head h3{font-size:17px;font-weight:600}
.version-head .os-note{font-size:12px;color:var(--muted);display:block;font-weight:400;margin-top:2px}
.badge-line{display:flex;flex-wrap:wrap;gap:8px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-pill);font-size:12px;font-weight:600;
  background:var(--brand-light);color:var(--brand);
}
.badge.teal{background:var(--teal-light);color:#0B7C78}
.version-meta{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px 18px;
  padding:16px 0 0;
  border-top:1px solid var(--divider);
  margin:0;
}
.version-meta div{display:flex;flex-direction:column;gap:2px}
.version-meta dt{font-size:12px;color:var(--muted);font-weight:400}
.version-meta dd{
  margin:0;font-size:14px;color:var(--ink);font-weight:600;
  font-variant-numeric:tabular-nums;
}
.version-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:4px}
.version-actions .btn{flex:1 1 160px}
.text-link{
  font-size:14px;font-weight:600;color:var(--brand);
  display:inline-flex;align-items:center;gap:6px;
}
.text-link:hover{text-decoration:underline;text-underline-offset:4px;color:var(--brand-dark)}

/* ---------- requirements ---------- */
.req-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}
.table-wrap{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);overflow:hidden;box-shadow:var(--sh-sm);
}
.req-table{width:100%;border-collapse:collapse;font-size:14px}
.req-table caption{
  caption-side:top;text-align:left;padding:18px 20px 12px;
  font-size:15px;font-weight:600;color:var(--ink);
}
.req-table th,.req-table td{
  padding:13px 20px;text-align:left;border-bottom:1px solid var(--divider);
  vertical-align:top;
}
.req-table thead th{
  background:var(--bg);color:var(--ink);font-weight:600;font-size:13px;
  white-space:nowrap;
}
.req-table tbody tr:nth-child(even){background:#FAFBFE}
.req-table tbody tr:last-child td{border-bottom:none}
.req-table td:first-child{color:var(--muted);white-space:nowrap}
.req-table td{color:var(--text);font-variant-numeric:tabular-nums}
.side-panel{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:24px;box-shadow:var(--sh-sm);
}
.side-panel h3{font-size:16px;margin-bottom:10px}
.side-panel p{font-size:14px;color:var(--muted)}
.qr-box{
  width:120px;height:120px;margin:18px auto 14px;
  border:2px dashed #C9D5E6;border-radius:12px;
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:12px;color:var(--muted);line-height:1.5;padding:10px;
  background:#FBFCFE;
}
.qr-caption{font-size:12px;color:var(--muted);text-align:center}

/* ---------- steps ---------- */
.steps-layout{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:center}
.steps-figure{
  border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:#EDF2FA;box-shadow:var(--sh-md);
}
.steps-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.step-list{display:flex;flex-direction:column;gap:0}
.step-item{
  display:grid;grid-template-columns:44px minmax(0,1fr);gap:16px;
  padding-bottom:26px;position:relative;
}
.step-item:last-child{padding-bottom:0}
.step-item::before{
  content:"";position:absolute;left:21px;top:44px;bottom:8px;width:2px;
  background:var(--divider);
}
.step-item:last-child::before{display:none}
.step-num{
  width:44px;height:44px;border-radius:50%;
  background:var(--brand-light);color:var(--brand-dark);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:15px;font-variant-numeric:tabular-nums;
  position:relative;z-index:1;border:1px solid #D5E3FA;
}
.step-item h3{font-size:17px;margin-bottom:6px}
.step-item p{font-size:14px;color:var(--muted);margin:0}

/* ---------- check cards ---------- */
.check-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.check-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:22px;
  box-shadow:var(--sh-sm);
  transition:box-shadow .18s ease,transform .18s ease;
  display:flex;gap:14px;align-items:flex-start;
}
.check-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
.check-card h3{font-size:16px;margin-bottom:6px}
.check-card p{font-size:14px;color:var(--muted);margin:0}
.tag-warn{
  display:inline-flex;align-items:center;height:22px;padding:0 9px;
  border-radius:var(--r-pill);font-size:12px;font-weight:600;
  background:#FDEDE4;color:var(--warn);margin-bottom:8px;
}

/* ---------- faq ---------- */
.faq-accordion .accordion-item{
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface);
  margin-bottom:12px;
  overflow:hidden;
  box-shadow:var(--sh-sm);
}
.faq-accordion .accordion-button{
  background:var(--surface);
  color:var(--ink);
  font-size:16px;
  font-weight:600;
  padding:18px 52px 18px 20px;
  box-shadow:none;
  line-height:1.5;
}
.faq-accordion .accordion-button:not(.collapsed){
  background:var(--bg);
  color:var(--brand-dark);
}
.faq-accordion .accordion-button:focus{
  box-shadow:none;
  outline:2px solid var(--brand);
  outline-offset:-2px;
}
.faq-accordion .accordion-button::after{
  background-image:none;
  width:12px;height:12px;
  border-right:2px solid var(--muted);
  border-bottom:2px solid var(--muted);
  transform:rotate(45deg);
  transition:transform .3s ease;
  position:absolute;right:24px;top:26px;
}
.faq-accordion .accordion-button:not(.collapsed)::after{
  transform:rotate(-135deg);
  border-color:var(--brand);
}
.faq-accordion .accordion-body{
  padding:0 20px 20px;
  font-size:14.5px;
  color:var(--text);
  background:var(--bg);
}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--dark);
  color:#fff;
  padding:56px 0;
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-inner h2{color:#fff;font-size:clamp(21px,2.4vw,27px);margin-bottom:8px}
.cta-inner p{color:rgba(255,255,255,.72);font-size:15px;margin:0;max-width:620px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-actions .btn-primary{background:#fff;color:var(--brand-dark);border-color:#fff}
.cta-actions .btn-primary:hover{background:var(--brand-light);color:var(--brand-dark)}
.cta-actions .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.cta-actions .btn-outline:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.site-footer .brand-name{color:#fff}
.site-footer .brand-mark{background:var(--brand)}
.footer-brand p{font-size:13.5px;color:rgba(255,255,255,.66);margin:14px 0 16px;max-width:300px}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tags span{
  font-size:12px;padding:4px 10px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.1);color:rgba(255,255,255,.8);
}
.footer-col h4{font-size:14px;color:#fff;font-weight:600;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:13px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-col p{font-size:13px;color:rgba(255,255,255,.72);margin-bottom:10px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.55);
}

/* ---------- mobile tabs ---------- */
.mobile-tabs{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:1040;
  background:rgba(255,255,255,.98);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -4px 18px rgba(16,42,86,.06);
}
.mobile-tabs ul{display:flex;margin:0;padding:0}
.mobile-tabs li{flex:1 1 0}
.mobile-tabs a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;height:60px;font-size:10px;color:var(--muted);
  position:relative;
}
.mobile-tabs a svg{width:22px;height:22px}
.mobile-tabs a.active{color:var(--brand);font-weight:600}
.mobile-tabs a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:24px;height:2px;background:var(--brand);border-radius:2px;
}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .steps-layout{grid-template-columns:6fr 6fr;gap:32px}
}
@media (max-width:991.98px){
  .nav-links,.nav-info,.nav-actions .btn-primary{display:none}
  .nav-icon-btn{display:inline-flex}
  .nav-bar{height:64px;gap:16px;justify-content:space-between}
  .site-header.is-scrolled .nav-bar{height:60px}
  .mobile-tabs{display:block}
  body{padding-bottom:72px}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .req-layout{grid-template-columns:1fr}
  .steps-layout{grid-template-columns:1fr}
  .steps-figure{order:-1}
  .check-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:767.98px){
  .container{padding-left:16px;padding-right:16px}
  .version-grid{grid-template-columns:1fr}
  .version-card{padding:20px}
  .hero-facts{gap:10px}
  .hero-fact{flex:1 1 calc(50% - 10px);min-width:0;padding:10px 14px}
  .section{padding:56px 0}
  .version-actions .btn{flex:1 1 100%}
  .version-actions{flex-direction:column;align-items:stretch;gap:12px}
  .version-actions .text-link{justify-content:center}
  .table-wrap{overflow-x:auto}
  .req-table{min-width:640px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .page-hero{padding:24px 0 32px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .version-card:hover,.check-card:hover{transform:none}
  .btn-primary:hover{transform:none}
}

/* roulang page: category4 */
:root{
  --primary:#1D5FD0;
  --primary-dark:#134496;
  --primary-50:#E8F0FE;
  --teal:#0EA5A0;
  --teal-50:#E6F6F5;
  --ink:#0F1B2D;
  --text:#3D4A5C;
  --muted:#6B7A90;
  --line:#E3E9F2;
  --line-soft:#EEF2F8;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --dark:#0E1B33;
  --warn:#E8590C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:18px;
  --r-pill:999px;
  --sh-sm:0 2px 8px rgba(16,42,86,.05);
  --sh-md:0 10px 28px rgba(16,42,86,.08);
  --sh-lg:0 18px 44px rgba(16,42,86,.10);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--primary-dark)}
button{font-family:inherit}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:10px;font-size:15px;font-weight:600;line-height:1.2;
  padding:11px 22px;border:1px solid transparent;cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:#fff;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-50);color:var(--primary-dark);border-color:var(--primary-dark)}
.btn-light{background:#fff;border-color:#fff;color:var(--primary-dark)}
.btn-light:hover{background:var(--primary-50);border-color:var(--primary-50);color:var(--primary-dark);transform:translateY(-1px)}
.btn-sm{padding:8px 16px;font-size:14px;border-radius:9px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-sm)}
.nav-bar{display:flex;align-items:center;gap:28px;height:72px;transition:height .22s ease}
.site-header.is-scrolled .nav-bar{height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto}
.brand-mark{
  position:relative;width:28px;height:28px;border-radius:9px;background:var(--primary);
  flex:0 0 auto;
}
.brand-mark::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:10px;height:13px;border:2px solid #fff;border-bottom:none;border-radius:5px 5px 0 0;
}
.brand-name{font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.2px}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a{
  position:relative;display:inline-block;padding:6px 0;
  font-size:15px;color:var(--text);font-weight:500;text-decoration:none;
  transition:color .18s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;
  background:transparent;transition:background-color .18s ease;
}
.nav-links a:hover{color:var(--primary)}
.nav-links a.active{color:var(--primary);font-weight:600}
.nav-links a.active::after{background:var(--primary)}
.nav-actions{display:flex;align-items:center;gap:14px;flex:0 0 auto;margin-left:8px}
.nav-info{font-size:14px;color:var(--muted);text-decoration:none}
.nav-info:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px}
.nav-icon-btn{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  align-items:center;justify-content:center;color:var(--primary);background:#fff;
}
.nav-icon-btn:hover{background:var(--primary-50);border-color:var(--primary-50);color:var(--primary-dark)}

/* ---------- 内页 Hero ---------- */
.page-hero{
  background:#EEF4FE;
  border-bottom:1px solid var(--line);
  padding:38px 0 46px;
}
.crumb{font-size:13px;color:var(--muted);margin-bottom:12px;display:flex;flex-wrap:wrap;gap:6px}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px}
.crumb span.sep{color:#B9C4D4}
.crumb span.current{color:var(--muted)}
.page-hero h1{font-size:clamp(28px,4vw,44px);line-height:1.25;font-weight:700;margin-bottom:12px}
.hero-lead{max-width:720px;font-size:16px;color:var(--text)}
.search-shell{
  margin-top:24px;max-width:580px;display:flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px 6px 6px 16px;
  box-shadow:var(--sh-sm);transition:border-color .18s ease,box-shadow .18s ease;
}
.search-shell:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-50)}
.search-shell svg{color:var(--muted);flex:0 0 auto}
.search-shell input{
  flex:1 1 auto;min-width:0;border:0;outline:none;background:transparent;
  font-size:15px;color:var(--ink);padding:9px 0;
}
.search-shell input::placeholder{color:var(--muted)}

/* ---------- 板块 ---------- */
.section{padding:86px 0}
.section.tight{padding:64px 0}
.section-head{margin-bottom:36px}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:700;letter-spacing:1px;
  color:var(--primary);margin-bottom:10px;
}
.section-head h2{font-size:clamp(24px,2.6vw,30px);line-height:1.3}
.section-head .sub{margin-top:12px;font-size:15px;color:var(--muted);max-width:700px}
.section-head.row-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.link-more{font-size:14px;font-weight:600;color:var(--primary);text-decoration:none;white-space:nowrap}
.link-more:hover{color:var(--primary-dark);text-decoration:underline;text-underline-offset:4px}

/* ---------- FAQ 双栏 ---------- */
.faq-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:36px;align-items:start}
.faq-aside{position:sticky;top:96px;display:flex;flex-direction:column;gap:16px}
.faq-nav{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-sm);padding:12px}
.faq-nav h3{font-size:12px;font-weight:700;letter-spacing:1px;color:var(--muted);padding:6px 12px 8px}
.faq-nav a{
  display:block;padding:9px 12px;border-radius:var(--r-sm);font-size:14px;color:var(--text);
  text-decoration:none;transition:background-color .18s ease,color .18s ease;
}
.faq-nav a:hover{background:var(--primary-50);color:var(--primary)}
.faq-nav a.is-on{background:var(--primary-50);color:var(--primary);font-weight:600}
.aside-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);padding:18px;
}
.aside-card p{font-size:13px;line-height:1.8;color:var(--muted);margin-bottom:14px}
.aside-card .btn{width:100%}

.faq-group{margin-bottom:34px}
.faq-group:last-child{margin-bottom:0}
.faq-group h3{
  font-size:19px;line-height:1.4;font-weight:600;margin-bottom:16px;
  display:flex;align-items:center;gap:10px;
}
.faq-group h3::before{content:"";width:4px;height:18px;border-radius:2px;background:var(--primary);flex:0 0 auto}
.accordion{
  --bs-accordion-border-width:0;
  --bs-accordion-bg:transparent;
  --bs-accordion-border-radius:12px;
  --bs-accordion-btn-focus-box-shadow:none;
  --bs-accordion-btn-padding-x:20px;
  --bs-accordion-body-padding-x:20px;
}
.accordion-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-sm);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.accordion-item:hover{border-color:#CFDBEC}
.accordion-button{
  font-size:16px;font-weight:600;color:var(--ink);background:#fff;
  padding:17px 52px 17px 20px;position:relative;line-height:1.5;
}
.accordion-button:not(.collapsed){background:var(--bg);color:var(--primary-dark);box-shadow:none}
.accordion-button:focus{box-shadow:none}
.accordion-button::after{
  content:"";position:absolute;right:24px;top:50%;
  width:9px;height:9px;margin:0;background:none;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .3s ease,border-color .3s ease;
}
.accordion-button:not(.collapsed)::after{
  border-color:var(--primary);transform:translateY(-30%) rotate(-135deg);
}
.accordion-body{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--text);border-top:0}
.accordion-body p+p{margin-top:10px}
.accordion-body .tip{font-size:13px;color:var(--muted);margin-top:10px}

/* ---------- 卡片网格 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.info-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-md);padding:26px;display:flex;flex-direction:column;gap:12px;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.info-card:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);border-color:#CFDBEC}
.icon-box{
  width:40px;height:40px;border-radius:12px;background:var(--primary-50);color:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;
}
.icon-box.teal{background:var(--teal-50);color:var(--teal)}
.info-card h3{font-size:17px;line-height:1.4;font-weight:600}
.info-card p{font-size:14px;line-height:1.8;color:var(--muted)}
.info-card .link-more{margin-top:auto;padding-top:4px}

/* ---------- 图文区 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.figure img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);
  box-shadow:var(--sh-md);border:1px solid var(--line);
}
.split h2{font-size:clamp(23px,2.4vw,28px);line-height:1.35;margin-bottom:14px}
.split .lead{font-size:15px;line-height:1.85;color:var(--text);margin-bottom:20px}
.check-list{display:flex;flex-direction:column;gap:12px}
.check-list li{display:flex;gap:10px;font-size:15px;line-height:1.7;color:var(--text)}
.check-list li svg{flex:0 0 auto;margin-top:4px;color:var(--primary)}
.check-list li b{color:var(--ink);font-weight:600}

/* ---------- 渠道条 ---------- */
.channel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.channel-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-sm);padding:24px;display:flex;align-items:flex-start;gap:16px;
  transition:transform .18s ease,box-shadow .18s ease;
}
.channel-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md)}
.channel-card h3{font-size:16px;font-weight:600;line-height:1.4;margin-bottom:6px}
.channel-card p{font-size:13px;color:var(--muted);line-height:1.7}
.badge-soft{
  display:inline-flex;align-items:center;border-radius:var(--r-pill);
  background:var(--primary-50);color:var(--primary);
  font-size:12px;font-weight:600;padding:3px 11px;line-height:1.6;
}
.badge-teal{background:var(--teal-50);color:#0A8580}

/* ---------- CTA 带 ---------- */
.cta-wrap{padding:0 0 86px}
.cta-band{
  background:var(--dark);border-radius:var(--r-lg);padding:44px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:clamp(21px,2.2vw,26px);line-height:1.35;margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.72);font-size:14px;line-height:1.8;max-width:620px}
.cta-band .btn{flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.12)}
.site-footer .brand-name{color:#fff}
.site-footer .brand-mark{background:#fff}
.site-footer .brand-mark::after{border-color:var(--primary)}
.footer-brand p{font-size:13px;line-height:1.85;margin:14px 0 16px;max-width:280px}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tags span{
  font-size:12px;padding:3px 11px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.8);
}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:13px;color:rgba(255,255,255,.72);text-decoration:none}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.footer-col p{font-size:13px;line-height:1.9;color:rgba(255,255,255,.72)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:22px;font-size:12px;color:rgba(255,255,255,.55);
}

/* ---------- 移动底部 Tab ---------- */
.tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:1040;
  background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -2px 12px rgba(16,42,86,.06);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar a{
  position:relative;flex:1 1 0;min-width:0;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:60px;font-size:10px;color:var(--muted);text-decoration:none;
  transition:color .18s ease;
}
.tabbar a span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.tabbar a.active{color:var(--primary)}
.tabbar a.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:24px;height:2px;border-radius:2px;background:var(--primary);
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .nav-links{gap:20px}
  .nav-links a{font-size:14px}
  .split{gap:40px}
}
@media (max-width:991.98px){
  body{padding-bottom:74px}
  .nav-links,.nav-actions .btn,.nav-actions .nav-info{display:none}
  .nav-icon-btn{display:inline-flex;margin-left:auto}
  .nav-bar{height:64px}
  .tabbar{display:flex}
  .section{padding:64px 0}
  .faq-layout{grid-template-columns:1fr;gap:24px}
  .faq-aside{position:static;order:2;flex-direction:row;flex-wrap:wrap}
  .faq-nav{flex:1 1 260px}
  .aside-card{flex:1 1 220px}
  .grid-3,.channel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr;gap:28px}
  .split .figure{order:-1}
  .cta-band{padding:34px 30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767.98px){
  .container{padding:0 16px}
  .page-hero{padding:28px 0 34px}
  .section{padding:56px 0}
  .grid-3,.channel-grid{grid-template-columns:1fr}
  .info-card{padding:20px}
  .search-shell{flex-direction:column;align-items:stretch;padding:8px}
  .search-shell input{padding:8px 10px}
  .search-shell .btn{width:100%}
  .cta-band{padding:28px 22px;flex-direction:column;align-items:flex-start}
  .cta-band .btn{width:100%}
  .cta-wrap{padding-bottom:56px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .accordion-button{font-size:15px;padding:15px 46px 15px 16px}
  .accordion-body{padding:0 16px 16px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition:none!important;animation:none!important}
  .info-card:hover,.channel-card:hover,.btn-primary:hover,.btn-light:hover{transform:none}
}

/* roulang page: category5 */
:root{
    --primary:#1D5FD0;
    --primary-dark:#134496;
    --primary-light:#E8F0FE;
    --teal:#0EA5A0;
    --teal-light:#E6F6F5;
    --title:#0F1B2D;
    --text:#3D4A5C;
    --muted:#6B7A90;
    --line:#E3E9F2;
    --divider:#EEF2F8;
    --bg:#F6F8FC;
    --white:#FFFFFF;
    --dark:#0E1B33;
    --warn:#E8590C;
    --radius-sm:8px;
    --radius-md:14px;
    --radius-lg:18px;
    --radius-btn:10px;
    --shadow-sm:0 2px 8px rgba(16,42,86,.05);
    --shadow-md:0 10px 28px rgba(16,42,86,.08);
    --shadow-lg:0 18px 44px rgba(16,42,86,.10);
    --sp-section:96px;
  }
  *{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    font-size:16px;
    line-height:1.75;
    color:var(--text);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,h5{color:var(--title);margin:0;font-weight:700;line-height:1.3;}
  p{margin:0 0 12px;}
  a{color:var(--primary);text-decoration:none;transition:color .18s ease;}
  a:hover{color:var(--primary-dark);}
  img{max-width:100%;display:block;}
  ul,ol{margin:0;padding:0;list-style:none;}
  button{font-family:inherit;}
  :focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
  .container{max-width:1200px;padding-left:24px;padding-right:24px;margin:0 auto;width:100%;}
  .num{font-variant-numeric:tabular-nums;}

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:1030;
    background:var(--white);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease,height .2s ease;
  }
  .nav-bar{
    height:72px;display:flex;align-items:center;gap:28px;
    transition:height .2s ease;
  }
  .site-header.is-scrolled .nav-bar{height:64px;}
  .site-header.is-scrolled{box-shadow:var(--shadow-sm);}
  .brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--title);letter-spacing:.2px;}
  .brand:hover{color:var(--primary-dark);}
  .brand-mark{
    width:28px;height:28px;border-radius:8px;background:var(--primary);position:relative;flex:none;
    display:inline-block;overflow:hidden;
  }
  .brand-mark::before{
    content:"";position:absolute;left:8px;top:7px;width:12px;height:14px;
    border:2px solid #fff;border-bottom:none;border-radius:6px 6px 0 0;
  }
  .brand-mark::after{
    content:"";position:absolute;left:12px;top:14px;width:8px;height:7px;
    border:2px solid #fff;border-top:none;border-radius:0 0 3px 3px;
  }
  .nav-links{display:flex;align-items:center;gap:4px;margin:0;flex:1;}
  .nav-links a{
    display:inline-flex;align-items:center;height:40px;padding:0 12px;border-radius:8px;
    font-size:15px;color:var(--text);position:relative;white-space:nowrap;transition:color .18s ease,background .18s ease;
  }
  .nav-links a::after{
    content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
    background:transparent;transition:background .18s ease;
  }
  .nav-links a:hover{color:var(--primary);background:var(--primary-light);}
  .nav-links a.active{color:var(--primary);font-weight:600;}
  .nav-links a.active::after{background:var(--primary);}
  .nav-actions{display:flex;align-items:center;gap:14px;flex:none;}
  .nav-info{font-size:14px;color:var(--muted);}
  .nav-info:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px;}
  .nav-icon-btn{
    width:40px;height:40px;border-radius:10px;display:none;align-items:center;justify-content:center;
    color:var(--primary);background:var(--primary-light);
  }
  .nav-icon-btn:hover{background:#dbe8fd;color:var(--primary-dark);}

  /* ============ 按钮 ============ */
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-btn);
    font-weight:600;font-size:15px;padding:11px 22px;border:1px solid transparent;cursor:pointer;
    transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
    white-space:nowrap;line-height:1.4;}
  .btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);}
  .btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff;transform:translateY(-1px);}
  .btn-primary:active{transform:translateY(0);}
  .btn-outline{background:#fff;color:var(--primary);border-color:#c6d8f6;}
  .btn-outline:hover{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary);}
  .btn-sm{padding:8px 16px;font-size:14px;}
  .btn-block{width:100%;}
  .text-link{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;}
  .text-link:hover{text-decoration:underline;text-underline-offset:4px;}
  .text-link svg{transition:transform .18s ease;}
  .text-link:hover svg{transform:translateX(3px);}

  /* ============ 矮版 Hero ============ */
  .page-hero{
    background:linear-gradient(180deg,#FFFFFF 0%,#F2F6FD 100%);
    border-bottom:1px solid var(--line);
    padding:44px 0 52px;
    position:relative;overflow:hidden;
  }
  .page-hero::before{
    content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
    background:radial-gradient(circle,rgba(29,95,208,.10),rgba(29,95,208,0) 68%);
    pointer-events:none;
  }
  .breadcrumb-line{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:14px;flex-wrap:wrap;}
  .breadcrumb-line a{color:var(--muted);}
  .breadcrumb-line a:hover{color:var(--primary);}
  .breadcrumb-line .sep{color:#c3cddc;}
  .breadcrumb-line .current{color:var(--muted);}
  .page-hero h1{
    font-size:clamp(26px,3.4vw,38px);
    line-height:1.28;max-width:820px;margin-bottom:14px;
  }
  .page-hero .hero-sub{font-size:16px;color:var(--text);max-width:720px;margin:0;}
  .hero-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
  .chip{
    display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--primary);
    background:var(--primary-light);border-radius:999px;padding:6px 14px;font-weight:500;
  }
  .chip.teal{background:var(--teal-light);color:#0B7F7B;}

  /* ============ 通用板块 ============ */
  .section{padding:var(--sp-section) 0;}
  .section.tight{padding:64px 0;}
  .section-head{max-width:760px;margin-bottom:40px;}
  .eyebrow{
    display:block;font-size:12px;letter-spacing:1px;font-weight:700;color:var(--primary);
    text-transform:uppercase;margin-bottom:10px;
  }
  .section-head h2{font-size:28px;line-height:1.3;margin-bottom:12px;}
  .section-head p{color:var(--text);margin:0;font-size:15px;}
  .surface{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow-md);}

  /* ============ 渠道卡 ============ */
  .channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .channel-card{
    background:var(--white);border:1px solid var(--line);border-radius:var(--radius-md);
    box-shadow:var(--shadow-md);padding:28px 26px;display:flex;flex-direction:column;
    transition:box-shadow .18s ease,transform .18s ease;
  }
  .channel-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px);}
  .icon-box{
    width:44px;height:44px;border-radius:12px;background:var(--primary-light);color:var(--primary);
    display:inline-flex;align-items:center;justify-content:center;margin-bottom:18px;flex:none;
  }
  .icon-box.teal{background:var(--teal-light);color:#0B7F7B;}
  .channel-card h3{font-size:18px;margin-bottom:8px;}
  .channel-card p{font-size:14.5px;color:var(--text);margin-bottom:16px;}
  .channel-meta{display:flex;flex-direction:column;gap:6px;margin-bottom:18px;font-size:13px;color:var(--muted);}
  .channel-meta span{display:flex;align-items:center;gap:8px;}
  .dot{width:6px;height:6px;border-radius:50%;background:var(--teal);flex:none;}
  .channel-card .text-link{margin-top:auto;}

  /* ============ 图文准备区 ============ */
  .prepare-wrap{display:grid;grid-template-columns:5fr 6fr;gap:56px;align-items:center;}
  .prepare-figure{
    border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);
    box-shadow:var(--shadow-md);background:var(--white);
  }
  .prepare-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
  .prepare-list{display:grid;gap:16px;margin-top:24px;}
  .prepare-item{
    display:flex;gap:14px;background:var(--white);border:1px solid var(--line);
    border-radius:var(--radius-sm);padding:16px 18px;box-shadow:var(--shadow-sm);
  }
  .check-icon{
    width:22px;height:22px;border-radius:50%;background:var(--teal-light);color:#0B7F7B;
    display:inline-flex;align-items:center;justify-content:center;flex:none;margin-top:2px;
  }
  .prepare-item h4{font-size:15.5px;margin-bottom:4px;}
  .prepare-item p{font-size:14px;color:var(--muted);margin:0;}

  /* ============ 工单表单区 ============ */
  .form-section{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
  .ticket-form{
    background:var(--white);border:1px solid var(--line);border-radius:var(--radius-md);
    box-shadow:var(--shadow-md);padding:32px;
  }
  .ticket-form h2{font-size:24px;margin-bottom:6px;}
  .ticket-form .form-lead{font-size:14px;color:var(--muted);margin-bottom:26px;}
  .field{margin-bottom:20px;}
  .field label{display:block;font-size:13px;font-weight:600;color:var(--title);margin-bottom:8px;}
  .req{color:var(--warn);margin-left:2px;}
  .field .form-control,.field .form-select{
    width:100%;height:46px;border-radius:var(--radius-btn);border:1px solid var(--line);
    background:#fff;font-size:14.5px;color:var(--text);padding:0 14px;
    transition:border-color .18s ease,box-shadow .18s ease;
    box-shadow:none;
  }
  .field textarea.form-control{height:auto;min-height:132px;padding:12px 14px;line-height:1.7;resize:vertical;}
  .field .form-control::placeholder,.field textarea.form-control::placeholder{color:var(--muted);}
  .field .form-control:focus,.field .form-select:focus{
    border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light);outline:none;
  }
  .field-hint{font-size:12px;color:var(--muted);margin-top:6px;}
  .check-row{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--text);}
  .check-row input{width:16px;height:16px;margin-top:4px;accent-color:var(--primary);flex:none;}
  .form-actions{display:flex;align-items:center;justify-content:flex-end;gap:14px;margin-top:24px;}
  .form-note{font-size:12px;color:var(--warn);margin-top:12px;display:none;}
  .form-note.show{display:block;}

  .side-card{
    background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-md);
    padding:26px;box-shadow:var(--shadow-sm);
  }
  .side-card + .side-card{margin-top:20px;}
  .side-card h3{font-size:16.5px;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
  .hours-list{display:grid;gap:10px;font-size:14px;}
  .hours-list li{display:flex;justify-content:space-between;gap:12px;padding-bottom:10px;border-bottom:1px dashed var(--divider);color:var(--text);}
  .hours-list li:last-child{border-bottom:none;padding-bottom:0;}
  .hours-list .val{color:var(--title);font-weight:600;}
  .side-tip{font-size:13.5px;color:var(--muted);margin:0;}
  .side-tip strong{color:var(--title);}

  /* ============ 处理流程 ============ */
  .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step;}
  .step-card{
    background:var(--white);border:1px solid var(--line);border-radius:var(--radius-md);
    padding:26px 22px;box-shadow:var(--shadow-sm);position:relative;
    transition:box-shadow .18s ease,transform .18s ease;
  }
  .step-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);}
  .step-num{
    width:36px;height:36px;border-radius:12px;background:var(--primary-light);color:var(--primary-dark);
    display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;
    margin-bottom:16px;font-variant-numeric:tabular-nums;
  }
  .step-card h3{font-size:16px;margin-bottom:8px;}
  .step-card p{font-size:14px;color:var(--muted);margin:0;}

  /* ============ FAQ ============ */
  .faq-wrap{display:grid;grid-template-columns:230px 1fr;gap:48px;align-items:start;}
  .faq-aside{position:sticky;top:96px;}
  .faq-aside h2{font-size:22px;margin-bottom:12px;}
  .faq-aside p{font-size:14px;color:var(--muted);margin-bottom:18px;}
  .faq-tags{display:flex;flex-direction:column;gap:8px;}
  .faq-tags span{
    font-size:13px;color:var(--text);background:var(--white);border:1px solid var(--line);
    border-radius:999px;padding:7px 14px;box-shadow:var(--shadow-sm);
  }
  .accordion-item{
    border:1px solid var(--line)!important;border-radius:12px!important;overflow:hidden;
    margin-bottom:12px;background:#fff;box-shadow:var(--shadow-sm);
  }
  .accordion-button{
    font-size:15.5px;font-weight:600;color:var(--title);background:#fff;box-shadow:none!important;
    padding:18px 20px;line-height:1.5;border-radius:12px!important;
  }
  .accordion-button:focus{box-shadow:0 0 0 3px var(--primary-light)!important;}
  .accordion-button:not(.collapsed){background:#F6F8FC;color:var(--primary-dark);}
  .accordion-button::after{
    content:"";width:9px;height:9px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;
    background-image:none!important;transform:rotate(45deg);transition:transform .3s ease;flex:none;
    margin-left:auto;margin-right:4px;
  }
  .accordion-button:not(.collapsed)::after{transform:rotate(-135deg);}
  .accordion-body{font-size:14.5px;color:var(--text);padding:4px 20px 20px;background:#F6F8FC;}

  /* ============ CTA 反色带 ============ */
  .cta-band{background:var(--dark);color:#fff;padding:64px 0;}
  .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;}
  .cta-inner h2{color:#fff;font-size:26px;margin-bottom:10px;}
  .cta-inner p{color:rgba(255,255,255,.74);margin:0;font-size:15px;max-width:620px;}
  .cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
  .btn-light-solid{background:#fff;color:var(--primary-dark);border-color:#fff;}
  .btn-light-solid:hover{background:var(--primary-light);color:var(--primary-dark);border-color:var(--primary-light);transform:translateY(-1px);}
  .btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.34);}
  .btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.6);}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 28px;}
  .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.12);}
  .footer-brand .brand{color:#fff;margin-bottom:14px;}
  .footer-brand .brand:hover{color:#fff;}
  .footer-brand .brand-name{color:#fff;}
  .footer-brand p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.7);max-width:280px;margin-bottom:16px;}
  .footer-tags{display:flex;flex-wrap:wrap;gap:8px;}
  .footer-tags span{
    font-size:12px;color:rgba(255,255,255,.82);border:1px solid rgba(255,255,255,.2);
    border-radius:999px;padding:4px 12px;
  }
  .footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;font-weight:600;}
  .footer-col ul{display:grid;gap:10px;}
  .footer-col a{font-size:13px;color:rgba(255,255,255,.72);}
  .footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
  .footer-col p{font-size:13px;color:rgba(255,255,255,.72);margin:0 0 10px;}
  .footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;font-size:12.5px;color:rgba(255,255,255,.56);}

  /* ============ 移动端底部 Tab ============ */
  .mobile-tab{
    display:none;position:fixed;left:0;right:0;bottom:0;z-index:1040;background:#fff;
    border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(16,42,86,.07);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .mobile-tab ul{display:flex;margin:0;}
  .mobile-tab li{flex:1;min-width:0;}
  .mobile-tab a{
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    height:60px;font-size:10px;color:var(--muted);position:relative;text-align:center;
  }
  .mobile-tab a svg{width:22px;height:22px;}
  .mobile-tab a.active{color:var(--primary);font-weight:600;}
  .mobile-tab a.active::before{
    content:"";position:absolute;top:0;width:22px;height:2px;border-radius:2px;background:var(--primary);
  }

  /* ============ 响应式 ============ */
  @media (max-width:1199.98px){
    :root{--sp-section:80px;}
    .prepare-wrap{gap:40px;}
    .faq-wrap{grid-template-columns:200px 1fr;gap:32px;}
  }
  @media (max-width:991.98px){
    :root{--sp-section:72px;}
    .nav-links{display:none;}
    .nav-info{display:none;}
    .nav-icon-btn{display:inline-flex;}
    .nav-bar{gap:16px;}
    .nav-actions{margin-left:auto;}
    .channel-grid{grid-template-columns:1fr;gap:18px;}
    .prepare-wrap{grid-template-columns:1fr;gap:32px;}
    .prepare-figure{order:-1;}
    .steps{grid-template-columns:repeat(2,1fr);}
    .faq-wrap{grid-template-columns:1fr;gap:28px;}
    .faq-aside{position:static;}
    .faq-tags{flex-direction:row;flex-wrap:wrap;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .mobile-tab{display:block;}
    body{padding-bottom:72px;}
    .cta-band{padding:52px 0;}
    .cta-inner h2{font-size:23px;}
  }
  @media (max-width:767.98px){
    :root{--sp-section:56px;}
    .container{padding-left:16px;padding-right:16px;}
    .page-hero{padding:32px 0 40px;}
    .page-hero .hero-sub{font-size:15px;}
    .ticket-form{padding:22px;}
    .form-actions{flex-direction:column;align-items:stretch;}
    .form-actions .btn{width:100%;}
    .steps{grid-template-columns:1fr;}
    .section-head h2{font-size:23px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{width:100%;}
    .footer-grid{grid-template-columns:1fr;}
    .footer-bottom{flex-direction:column;gap:8px;}
    .accordion-button{font-size:14.5px;padding:16px;}
    .side-card{padding:20px;}
  }
  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{transition:none!important;animation:none!important;}
    .channel-card:hover,.step-card:hover,.btn:hover{transform:none!important;}
  }