/* roulang page: index */
/* ================= 设计令牌 ================= */
:root{
  --ink-900:#05080D;
  --ink-800:#0A1018;
  --ink-700:#111A25;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --t1:#E9F2F7;
  --t2:#9AACBB;
  --t3:#67788A;
  --brand:#26D6B5;
  --brand-700:#14A98E;
  --brand-2:#FF7A3D;
  --accent:#7B6CFF;
  --glow:0 0 0 1px rgba(38,214,181,.35), 0 10px 30px -10px rgba(38,214,181,.45);
  --r-card:16px;
  --r-img:14px;
  --r-btn:999px;
  --r-input:12px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
}

/* ================= 基础重置 ================= */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:15px;
  line-height:1.75;
  color:var(--t2);
  background-color:var(--ink-900);
  background-image:radial-gradient(900px 420px at 50% -160px, rgba(38,214,181,.10), transparent 72%);
  background-repeat:no-repeat;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.032) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(640px 360px at 50% 0, #000, transparent 78%);
  mask-image:radial-gradient(640px 360px at 50% 0, #000, transparent 78%);
}
img{max-width:100%;display:block;border:0}
a{color:var(--t2);text-decoration:none;transition:color .22s ease}
a:hover{color:var(--brand)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--t1);font-family:var(--font);letter-spacing:-.01em}
p{margin:0}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
strong{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.grid-container{max-width:1200px;padding-left:20px;padding-right:20px;position:relative;z-index:1}
@media screen and (min-width:40em){
  .grid-container{padding-left:24px;padding-right:24px}
}

/* ================= 头部与导航 ================= */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,backdrop-filter .25s ease;
}
.site-header.is-stuck{
  background:rgba(5,8,13,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.header-top{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 0 12px;transition:padding .25s ease;
}
.site-header.is-stuck .header-top{padding:8px 0 6px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--t1);font-weight:700}
.logo-mark{
  width:30px;height:30px;flex:0 0 30px;display:grid;place-items:center;
  border-radius:9px;background:rgba(38,214,181,.12);border:1px solid rgba(38,214,181,.35);
}
.logo-mark svg{width:18px;height:18px;display:block}
.logo-text{font-size:17px;display:inline-flex;align-items:baseline;gap:6px;white-space:nowrap}
.logo-sub{font-size:12px;font-weight:500;color:var(--t3)}
.header-actions{display:flex;align-items:center;gap:10px}
.menu-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.03);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.menu-toggle span{display:block;width:16px;height:1.5px;background:var(--t1);border-radius:2px;transition:transform .22s ease}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}

.chip-nav{
  display:flex;align-items:center;gap:10px;
  padding:2px 0 14px;
  overflow-x:auto;
  scrollbar-width:none;-ms-overflow-style:none;
  -webkit-mask-image:linear-gradient(to right,#000 0,#000 calc(100% - 32px),transparent 100%);
  mask-image:linear-gradient(to right,#000 0,#000 calc(100% - 32px),transparent 100%);
}
.chip-nav::-webkit-scrollbar{display:none}
.chip{
  position:relative;flex:0 0 auto;display:inline-flex;align-items:center;
  height:36px;padding:0 16px;border-radius:999px;
  border:1px solid var(--line);color:var(--t2);font-size:13px;white-space:nowrap;
  transition:color .22s ease,border-color .22s ease,background .22s ease;
}
.chip:hover{color:var(--t1);border-color:var(--line-strong);background:rgba(255,255,255,.03)}
.chip.is-active{
  color:var(--t1);padding-left:22px;
  background:rgba(38,214,181,.12);
  border-color:rgba(38,214,181,.5);
}
.chip.is-active::before{
  content:"";position:absolute;left:8px;top:50%;transform:translateY(-50%);
  width:4px;height:14px;border-radius:2px;background:var(--brand);
}

/* ================= 按钮 ================= */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 22px;border-radius:var(--r-btn);
  font-size:14px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:all .24s ease;
}
.btn-primary{background:var(--brand);color:#04120F;box-shadow:var(--glow)}
.btn-primary:hover{color:#04120F;filter:brightness(1.06);box-shadow:0 0 0 1px rgba(38,214,181,.5),0 14px 36px -12px rgba(38,214,181,.65)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--t1);border-radius:12px}
.btn-ghost:hover{color:var(--brand);border-color:rgba(38,214,181,.55);background:rgba(38,214,181,.06)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{min-height:40px;padding:10px 18px;font-size:13px}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--brand);white-space:nowrap}
.link-more:hover{color:var(--t1)}

/* ================= 通用板块 ================= */
.section{padding:88px 0;position:relative}
.section-head{margin-bottom:40px;max-width:780px}
.section-head h2{font-size:clamp(22px,2.6vw,34px);font-weight:700;line-height:1.25}
.section-head p{margin-top:12px;font-size:15px;color:var(--t2);line-height:1.75}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;max-width:none}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.04em;color:var(--brand);
  padding:6px 14px;border-radius:999px;
  border:1px solid rgba(38,214,181,.3);background:rgba(38,214,181,.08);
}

/* ================= Hero ================= */
.hero{padding:56px 0 76px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;
  border-radius:50%;border:1px solid rgba(38,214,181,.10);pointer-events:none;
}
.hero::after{
  content:"";position:absolute;right:-40px;top:-40px;width:360px;height:360px;
  border-radius:50%;border:1px solid rgba(123,108,255,.08);pointer-events:none;
}
.hero-row{row-gap:36px}
.hero-copy h1{
  margin-top:20px;
  font-size:clamp(30px,4.6vw,54px);
  font-weight:800;line-height:1.14;letter-spacing:-.012em;
  color:var(--t1);
}
.hero-sub{margin-top:16px;font-size:16px;color:var(--t1);font-weight:600}
.hero-text{margin-top:14px;font-size:15px;line-height:1.8;color:var(--t2);max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-badges{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;
  padding-top:22px;border-top:1px solid var(--line);
}
.hero-badges li{
  display:flex;align-items:baseline;gap:8px;
  padding:8px 16px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.02);
}
.hero-badges strong{font-size:18px;font-weight:800;color:var(--brand-2)}
.hero-badges span{font-size:12.5px;color:var(--t3)}
.hero-figure{
  position:relative;margin:0;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line-strong);
  aspect-ratio:16/10;background:var(--ink-800);
}
.hero-figure img{width:100%;height:100%;object-fit:cover;opacity:.9}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,13,0) 38%,rgba(5,8,13,.74));
}
.hero-chip{
  position:absolute;right:16px;bottom:16px;z-index:3;
  padding:7px 14px;border-radius:999px;font-size:12px;color:var(--t1);
  border:1px solid rgba(255,122,61,.45);background:rgba(255,122,61,.14);
}
.hero-glass{
  display:flex;align-items:center;gap:10px;margin-top:16px;
  padding:13px 18px;border-radius:14px;font-size:13px;color:var(--t2);
  border:1px solid var(--line);background:rgba(255,255,255,.04);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
}
.hero-glass .dot{
  width:8px;height:8px;border-radius:50%;background:var(--brand);
  box-shadow:0 0 0 4px rgba(38,214,181,.15);
}

/* ================= 服务区 ================= */
.svc-list li{
  display:flex;gap:16px;padding:22px 0 22px 18px;
  border-left:2px solid var(--brand);
  border-bottom:1px solid var(--line);
  transition:background .22s ease;
}
.svc-list li:first-child{border-top:1px solid var(--line)}
.svc-list li:hover{background:rgba(255,255,255,.02)}
.svc-no{font-size:14px;font-weight:800;color:var(--brand);letter-spacing:.04em;flex:0 0 28px;padding-top:2px}
.svc-list h3{font-size:17px;font-weight:650;line-height:1.4}
.svc-list p{margin-top:6px;font-size:13.5px;color:var(--t3)}
.svc-cards{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.card{
  position:relative;background:var(--ink-700);
  border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;
  transition:border-color .24s ease,transform .24s ease;
}
.card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.card-accent::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--brand);border-radius:var(--r-card) var(--r-card) 0 0;
}
.svc-card-lg{grid-row:span 2;display:flex;flex-direction:column;overflow:hidden;padding:0}
.svc-card-lg img{width:100%;height:180px;object-fit:cover;border-radius:var(--r-card) var(--r-card) 0 0}
.svc-card-lg .svc-body{padding:20px 22px 24px}
.svc-card-lg h3{font-size:19px}
.svc-card-lg p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--t2)}
.svc-icon{
  width:38px;height:38px;border-radius:11px;margin-bottom:14px;
  display:grid;place-items:center;
  border:1px solid rgba(38,214,181,.3);background:rgba(38,214,181,.1);
  color:var(--brand);
}
.svc-icon svg{width:18px;height:18px}
.svc-card-icon h3{font-size:18px}
.svc-card-icon p{margin-top:8px;font-size:13.5px;line-height:1.7;color:var(--t3)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{
  font-size:12px;padding:4px 12px;border-radius:999px;
  border:1px solid var(--line);color:var(--t3);
}
.tag-brand{color:var(--brand);border-color:rgba(38,214,181,.35);background:rgba(38,214,181,.08)}
.tag-accent{color:var(--accent);border-color:rgba(123,108,255,.35);background:rgba(123,108,255,.1)}
.tag-orange{color:var(--brand-2);border-color:rgba(255,122,61,.35);background:rgba(255,122,61,.1)}

/* ================= 数据通栏 ================= */
.stats-band{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:44px 0;background:var(--ink-800);
}
.stats-row{row-gap:24px}
.stat{
  padding:6px 22px;border-left:1px solid var(--line);
}
.stat:first-child{border-left:0;padding-left:0}
.stat-num{
  display:block;font-size:clamp(32px,3.6vw,44px);font-weight:800;line-height:1.1;
  color:var(--brand-2);font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.stat p{margin-top:8px;font-size:13.5px;color:var(--t2)}

/* ================= 案例 ================= */
.case-grid{display:grid;gap:56px}
.case-row{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.case-row.reverse .case-media{order:2}
.case-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);background:var(--ink-800);
}
.case-media.ratio-43{aspect-ratio:4/3}
.case-media.ratio-169{aspect-ratio:16/9}
.case-media img{width:100%;height:100%;object-fit:cover;opacity:.92}
.case-body h3{font-size:clamp(19px,2vw,24px);font-weight:650;line-height:1.4;margin-top:14px}
.case-body p{margin-top:12px;font-size:14.5px;line-height:1.8;color:var(--t2)}
.case-body .link-more{margin-top:16px}
.case-duo{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.case-mini h3{font-size:18px;margin-top:14px}
.case-mini p{margin-top:10px;font-size:14px;color:var(--t3);line-height:1.75}

/* ================= 流程时间轴 ================= */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;
  padding-top:8px;
}
.steps::before{
  content:"";position:absolute;left:14px;right:14px;top:26px;height:1px;
  background-image:linear-gradient(to right,var(--line-strong) 0,var(--line-strong) 6px,transparent 6px,transparent 14px);
  background-size:14px 1px;background-repeat:repeat-x;
}
.step{position:relative;padding-right:12px}
.step-num{
  display:grid;place-items:center;width:38px;height:38px;border-radius:50%;
  font-size:13px;font-weight:800;color:var(--brand);
  background:var(--ink-900);border:1px solid rgba(38,214,181,.4);
  position:relative;z-index:2;
}
.step h3{margin-top:20px;font-size:18px}
.step p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--t3)}

/* ================= 最新信息（CMS） ================= */
.news-grid{row-gap:24px}
.news-card{padding:0;overflow:hidden;display:flex;flex-direction:column;height:100%}
.news-thumb{
  display:block;position:relative;aspect-ratio:16/9;overflow:hidden;
  background:var(--ink-800);border-bottom:1px solid var(--line);
}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .28s ease}
.news-card:hover .news-thumb img{transform:scale(1.03)}
.thumb-fallback{
  display:grid;place-items:center;width:100%;height:100%;
  font-size:30px;font-weight:800;color:rgba(38,214,181,.85);
  background:
    repeating-linear-gradient(135deg, rgba(38,214,181,.12) 0 8px, transparent 8px 16px),
    var(--ink-800);
}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.chip-cat{
  align-self:flex-start;font-size:12px;padding:4px 12px;border-radius:999px;
  border:1px solid var(--line);color:var(--t3);
}
.cat-a{color:var(--brand);border-color:rgba(38,214,181,.35);background:rgba(38,214,181,.08)}
.cat-b{color:var(--accent);border-color:rgba(123,108,255,.35);background:rgba(123,108,255,.1)}
.cat-c{color:var(--brand-2);border-color:rgba(255,122,61,.35);background:rgba(255,122,61,.1)}
.news-body h3{margin-top:12px;font-size:17px;font-weight:650;line-height:1.45}
.news-body h3 a{color:var(--t1)}
.news-body h3 a:hover{color:var(--brand)}
.news-sum{
  margin-top:10px;font-size:13.5px;line-height:1.7;color:var(--t2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body h3{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;padding-top:16px;display:flex;align-items:center;
  justify-content:space-between;gap:12px;border-top:1px solid var(--line);
}
.news-foot time{font-size:12.5px;color:var(--t3);font-variant-numeric:tabular-nums}
.news-foot .arrow{color:var(--brand);font-size:14px}
.empty-state{
  border:1px dashed var(--line-strong);border-radius:var(--r-card);
  padding:48px 24px;text-align:center;
}
.empty-state p{font-size:14.5px;color:var(--t2)}
.empty-state .btn{margin-top:18px}

/* ================= FAQ ================= */
.faq-intro h2{font-size:clamp(22px,2.6vw,34px);font-weight:700;line-height:1.25}
.faq-intro p{margin-top:12px;font-size:15px;color:var(--t2)}
.faq-intro .btn{margin-top:24px}
.faq-list details{border-bottom:1px solid var(--line);transition:background .22s ease,border-color .22s ease}
.faq-list details:first-child{border-top:1px solid var(--line)}
.faq-list summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 6px;list-style:none;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--t1);
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{
  content:"+";font-size:19px;font-weight:400;color:var(--brand);
  transition:transform .22s ease;flex:0 0 auto;
}
.faq-list details[open] summary::after{content:"−"}
.faq-list details[open]{
  background:rgba(38,214,181,.06);
  border-left:3px solid var(--brand);
  border-radius:0 10px 10px 0;
  padding-left:14px;
}
.faq-a{padding:0 6px 20px;font-size:14.5px;line-height:1.8;color:var(--t2);max-width:680px}

/* ================= 联系 / CTA ================= */
.cta-glass{
  border-radius:20px;padding:36px;
  border:1px solid var(--line-strong);
  background:linear-gradient(135deg,rgba(38,214,181,.07),rgba(255,255,255,.03));
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:0 20px 60px -32px rgba(38,214,181,.35);
}
.cta-copy h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.3}
.cta-copy > p{margin-top:12px;font-size:15px;color:var(--t2)}
.cta-info{margin-top:24px;display:grid;gap:12px}
.cta-info li{
  position:relative;padding-left:18px;font-size:13.5px;color:var(--t2);
}
.cta-info li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;
  border-radius:50%;background:var(--brand);
}
.contact-form{margin-top:8px}
.field{margin-bottom:16px}
.field label{
  display:block;font-size:13px;font-weight:600;color:var(--t1);margin-bottom:8px;
}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border-radius:var(--r-input);
  background:rgba(5,8,13,.6);border:1px solid var(--line);
  color:var(--t1);font-size:14px;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.field input::placeholder,.field textarea::placeholder{color:var(--t3)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 1px rgba(38,214,181,.4),0 8px 24px -14px rgba(38,214,181,.6);
}
.field select{appearance:none;-webkit-appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--t3) 50%),linear-gradient(135deg,var(--t3) 50%,transparent 50%);background-position:calc(100% - 20px) 50%,calc(100% - 14px) 50%;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field textarea{resize:vertical;min-height:104px;line-height:1.7}
.btn-submit{width:100%;max-width:220px}
.form-note{margin-top:14px;font-size:13.5px;color:var(--brand)}

/* ================= 页脚 ================= */
.site-footer{
  margin-top:24px;background:var(--ink-900);
  border-top:1px solid var(--line);padding:56px 0 28px;
}
.foot-cols{row-gap:32px}
.foot-brand{font-size:17px;font-weight:700;color:var(--t1)}
.foot-desc{margin-top:12px;font-size:13.5px;line-height:1.8;color:var(--t3);max-width:320px}
.foot-col h3{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:16px}
.foot-col ul{display:grid;gap:10px}
.foot-col a{font-size:13px;color:var(--t2)}
.foot-col li{font-size:13px;color:var(--t3)}
.foot-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
}
.foot-bottom p{font-size:12.5px;color:var(--t3)}

/* ================= 响应式 ================= */
@media screen and (max-width:1023px){
  .section{padding:64px 0}
  .stat{padding-left:0;border-left:0}
  .steps{grid-template-columns:1fr 1fr;gap:32px 24px}
  .steps::before{display:none}
  .case-row{grid-template-columns:1fr;gap:24px}
  .case-row.reverse .case-media{order:0}
  .svc-cards{grid-template-columns:1fr 1fr}
  .cta-glass{padding:28px}
}
@media screen and (max-width:767px){
  .stat{padding:12px 0;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:0}
  .case-duo{grid-template-columns:1fr}
  .svc-cards{grid-template-columns:1fr}
  .svc-card-lg img{height:200px}
}
@media screen and (max-width:639px){
  body::before{display:none}
  .section{padding:52px 0}
  .section-head{margin-bottom:28px}
  .hero{padding:36px 0 56px}
  .hero::before,.hero::after{display:none}
  .hero-figure{order:2;margin-top:8px;max-height:60vh}
  .hero-badges{gap:8px}
  .hero-badges li{padding:7px 12px}
  .menu-toggle{display:flex}
  .header-actions .btn-sm{display:none}
  .chip-nav{
    -webkit-mask-image:none;mask-image:none;
    padding-bottom:12px;
  }
  .chip-nav.is-open{
    flex-direction:column;align-items:stretch;
    overflow:visible;gap:8px;padding-bottom:18px;
  }
  .chip-nav.is-open .chip{width:100%;justify-content:center;height:44px}
  .chip-nav.is-open .chip.is-active{padding-left:22px;justify-content:center}
  .steps{grid-template-columns:1fr;gap:26px}
  .step{border-left:1px solid var(--line);padding-left:20px}
  .step-num{position:absolute;left:-19px;top:0;width:34px;height:34px;font-size:12px}
  .step h3{margin-top:6px}
  .logo-text{font-size:16px}
  .logo-sub{display:none}
  .cta-glass{padding:22px;border-radius:16px}
  .btn-submit{max-width:none;width:100%}
  .foot-bottom{flex-direction:column;gap:8px}
}

/* roulang page: article */
:root{
  --ink-900:#05080D;
  --ink-800:#0A1018;
  --ink-700:#111A25;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --t1:#E9F2F7;
  --t2:#9AACBB;
  --t3:#67788A;
  --brand:#26D6B5;
  --brand-700:#14A98E;
  --brand-2:#FF7A3D;
  --accent:#7B6CFF;
  --glow:0 0 0 1px rgba(38,214,181,.35), 0 10px 30px -10px rgba(38,214,181,.45);
  --r-card:16px;
  --r-img:14px;
  --r-input:12px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--t2);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;left:0;right:0;top:0;height:540px;pointer-events:none;z-index:0;
  background:radial-gradient(62% 100% at 50% 0%,rgba(38,214,181,.10),transparent 72%);
}
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.55;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(70% 42% at 50% 0%,#000,transparent 78%);
  mask-image:radial-gradient(70% 42% at 50% 0%,#000,transparent 78%);
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:var(--t1);text-decoration:none;transition:color .24s ease}
a:hover{color:var(--brand)}
h1,h2,h3,h4{margin:0;color:var(--t1);font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.grid-container{max-width:1200px;padding-left:20px;padding-right:20px}
@media screen and (min-width:640px){.grid-container{padding-left:24px;padding-right:24px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,13,.55);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .24s ease,border-color .24s ease;
}
.site-header.is-scrolled{background:rgba(5,8,13,.88);border-bottom-color:var(--line)}
.top-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px;transition:padding .24s ease}
.site-header.is-scrolled .top-row{padding-top:10px;padding-bottom:10px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;color:var(--t1);letter-spacing:-.01em}
.brand:hover{color:var(--t1)}
.brand-mark{width:30px;height:30px;flex:0 0 30px;display:block}
.brand-mark svg{width:100%;height:100%;display:block}
.top-actions{display:flex;align-items:center;gap:10px}
.menu-toggle{
  display:none;align-items:center;gap:6px;min-height:42px;padding:0 16px;
  background:transparent;border:1px solid var(--line-strong);border-radius:999px;
  color:var(--t1);font-size:13px;cursor:pointer;transition:border-color .2s ease,color .2s ease;
}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}
.nav-wrap{border-top:1px solid var(--line)}
.chip-nav{
  display:flex;align-items:center;gap:8px;overflow-x:auto;padding:10px 0;
  scrollbar-width:none;-ms-overflow-style:none;
}
.chip-nav::-webkit-scrollbar{display:none}
.chip{
  position:relative;flex:0 0 auto;display:inline-flex;align-items:center;
  padding:8px 16px;border-radius:999px;border:1px solid var(--line);
  color:var(--t2);font-size:13px;line-height:1;white-space:nowrap;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.chip:hover{color:var(--t1);border-color:var(--line-strong)}
.chip.is-active{color:var(--t1);background:rgba(38,214,181,.12);border-color:rgba(38,214,181,.55);padding-left:20px}
.chip.is-active::before{content:"";position:absolute;left:8px;top:50%;transform:translateY(-50%);width:4px;height:14px;border-radius:2px;background:var(--brand)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-size:14px;font-weight:600;line-height:1;cursor:pointer;
  transition:filter .22s ease,transform .18s ease,box-shadow .24s ease,background .24s ease,border-color .24s ease,color .24s ease;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#04120F;box-shadow:var(--glow)}
.btn-primary:hover{filter:brightness(1.06);color:#04120F;box-shadow:0 0 0 1px rgba(38,214,181,.5),0 14px 34px -12px rgba(38,214,181,.6)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--t1);border-radius:12px}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{min-height:38px;padding:9px 18px;font-size:13px}
.btn-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--brand);font-weight:600}
.btn-link::after{content:"→";transition:transform .2s ease}
.btn-link:hover::after{transform:translateX(3px)}

/* ============ 标签 ============ */
.tag{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;
  font-size:12px;line-height:1.6;border:1px solid var(--line);color:var(--t2);
  background:rgba(255,255,255,.02);
}
.tag-brand{color:var(--brand);border-color:rgba(38,214,181,.4);background:rgba(38,214,181,.10)}
.tag-accent{color:var(--accent);border-color:rgba(123,108,255,.4);background:rgba(123,108,255,.10)}
.tag-warm{color:var(--brand-2);border-color:rgba(255,122,61,.4);background:rgba(255,122,61,.10)}

/* ============ 主体 ============ */
main{position:relative;z-index:1}
.article-hero{padding:34px 0 24px;border-bottom:1px solid var(--line)}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3)}
.crumbs a{color:var(--t3)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:var(--t3);opacity:.7}
.crumbs .current{color:var(--t2);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.post-title{
  font-size:clamp(24px,3.4vw,34px);line-height:1.34;font-weight:800;
  margin:18px 0 0;max-width:820px;word-break:break-word;
}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:18px}
.meta-item{font-size:13px;color:var(--t3);font-variant-numeric:tabular-nums}
.meta-line{width:1px;height:12px;background:var(--line-strong)}

.article-layout{padding:38px 0 0}
.post-main{max-width:760px}
.post-body{font-size:16px;line-height:1.9;color:var(--t2);word-break:break-word}
.post-body p{margin:0 0 1.1em}
.post-body h2{
  position:relative;font-size:clamp(20px,2.2vw,24px);line-height:1.45;
  margin:34px 0 14px;padding-left:14px;
}
.post-body h2::before{content:"";position:absolute;left:0;top:7px;bottom:7px;width:3px;border-radius:2px;background:var(--brand)}
.post-body h3{font-size:18px;line-height:1.5;margin:26px 0 12px}
.post-body h4{font-size:16px;margin:20px 0 10px}
.post-body ul{margin:0 0 1.1em}
.post-body ul li{position:relative;padding-left:18px;margin-bottom:8px}
.post-body ul li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.post-body ol{counter-reset:post-ol;margin:0 0 1.1em}
.post-body ol li{position:relative;padding-left:26px;margin-bottom:8px;counter-increment:post-ol}
.post-body ol li::before{
  content:counter(post-ol);position:absolute;left:0;top:0;
  color:var(--brand);font-weight:700;font-variant-numeric:tabular-nums;
}
.post-body blockquote{
  margin:20px 0;padding:16px 20px;border-left:2px solid var(--brand);
  background:rgba(255,255,255,.03);border-radius:0 12px 12px 0;color:var(--t2);
}
.post-body blockquote p:last-child{margin-bottom:0}
.post-body img{margin:20px 0 12px;border-radius:var(--r-img);border:1px solid var(--line)}
.post-body figure{margin:20px 0}
.post-body figcaption{font-size:12px;color:var(--t3);margin-top:8px;text-align:left}
.post-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.post-body strong{color:var(--t1)}
.post-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
.post-body th,.post-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.post-body th{color:var(--t1);background:rgba(255,255,255,.02);font-weight:600}
.post-body pre{
  background:var(--ink-800);border:1px solid var(--line);border-radius:12px;
  padding:16px;overflow-x:auto;font-size:14px;line-height:1.7;
}
.post-body code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.94em}
.post-body :not(pre) > code{background:var(--ink-800);border:1px solid var(--line);border-radius:6px;padding:1px 6px;color:var(--t1)}
.post-body hr{border:0;border-top:1px solid var(--line);margin:28px 0}

.side-stack{display:flex;flex-direction:column;gap:20px;margin-top:36px}
.side-card{background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;position:relative}
.side-card::before{content:"";position:absolute;left:20px;right:20px;top:0;height:2px;background:var(--brand);border-radius:0 0 2px 2px;opacity:.8}
.side-title{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:650;color:var(--t1);margin-bottom:14px}
.side-title::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--brand);display:inline-block}
.toc-list li{margin-bottom:4px}
.toc-list a{
  display:block;font-size:13.5px;line-height:1.6;color:var(--t2);
  padding:7px 0 7px 12px;border-left:1px solid var(--line);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.toc-list a:hover{color:var(--brand);border-left-color:var(--brand);background:rgba(255,255,255,.02)}
.rank-list li{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.rank-list li:last-child{border-bottom:0;padding-bottom:0}
.rank-num{flex:0 0 20px;font-size:14px;font-weight:800;color:var(--brand-2);font-variant-numeric:tabular-nums;line-height:1.7}
.rank-list a{font-size:14px;line-height:1.65;color:var(--t2)}
.rank-list a:hover{color:var(--brand)}
.side-note{font-size:13px;line-height:1.85;color:var(--t3);margin:0}

.empty-state{
  border:1px dashed var(--line-strong);border-radius:var(--r-card);
  padding:48px 24px;text-align:center;background:rgba(255,255,255,.02);
}
.empty-state p{color:var(--t2);margin:0 0 18px}

/* ============ 板块与卡片 ============ */
.block{padding-top:72px}
.block-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px}
.block-head h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3}
.block-head p{font-size:14px;color:var(--t2);margin:8px 0 0}
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 20px 44px -26px rgba(0,0,0,.95)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-800)}
.card-media img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .32s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-tag{position:absolute;left:12px;bottom:12px}
.card-body{display:flex;flex-direction:column;gap:10px;padding:20px;flex:1}
.card-title{
  font-size:17px;line-height:1.45;font-weight:650;color:var(--t1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-title a:hover{color:var(--brand)}
.card-text{
  font-size:14px;line-height:1.75;color:var(--t2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:auto;padding-top:10px;font-size:12px;color:var(--t3);
  font-variant-numeric:tabular-nums;
}
.card-foot .more{color:var(--brand);font-weight:600}

.post-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px;padding-top:26px;border-top:1px solid var(--line)}

.cta-strip{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  background:var(--ink-800);border:1px solid var(--line);border-top:2px solid var(--brand);
  border-radius:var(--r-card);padding:26px 28px;margin-top:64px;
}
.cta-strip h2{font-size:20px;line-height:1.4}
.cta-strip p{margin:8px 0 0;font-size:14px;color:var(--t2)}

/* ============ 页脚 ============ */
.site-footer{position:relative;z-index:1;background:var(--ink-900);border-top:1px solid var(--line);margin-top:88px}
.foot-cols{padding-top:56px}
.foot-brand{font-size:17px;font-weight:800;color:var(--t1);margin:0 0 12px}
.foot-desc{font-size:13px;line-height:1.85;color:var(--t3);max-width:330px;margin:0}
.foot-col h3{font-size:14px;font-weight:600;color:var(--t1);margin:0 0 14px}
.foot-col ul li{font-size:13px;color:var(--t2);margin-bottom:9px;line-height:1.7}
.foot-col ul li a{color:var(--t2)}
.foot-col ul li a:hover{color:var(--brand)}
.foot-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  border-top:1px solid var(--line);margin-top:36px;padding:18px 0;font-size:12px;color:var(--t3);
}
.foot-bottom p{margin:0}

/* ============ 响应式 ============ */
@media screen and (min-width:1024px){
  .side-stack{margin-top:0;position:sticky;top:108px}
}
@media screen and (max-width:1023px){
  .cards-3{grid-template-columns:repeat(2,1fr)}
  .chip-nav{
    -webkit-mask-image:linear-gradient(90deg,#000 0,#000 88%,transparent 100%);
    mask-image:linear-gradient(90deg,#000 0,#000 88%,transparent 100%);
  }
  .site-header.nav-open .chip-nav{-webkit-mask-image:none;mask-image:none}
  .block{padding-top:64px}
}
@media screen and (max-width:639px){
  .cards-3{grid-template-columns:1fr}
  .menu-toggle{display:inline-flex}
  .chip{padding:11px 16px}
  .chip.is-active{padding-left:22px}
  .chip-nav{flex-wrap:nowrap}
  .site-header.nav-open .chip-nav{flex-wrap:wrap;overflow:visible}
  .site-header.nav-open .chip-nav .chip{flex:1 1 auto;justify-content:center}
  .post-meta{gap:10px}
  .post-title{font-size:24px}
  .block{padding-top:52px}
  .cta-strip{padding:22px 20px}
  .article-hero{padding:26px 0 20px}
  .empty-state{padding:36px 18px}
}
@media screen and (max-width:520px){
  .top-actions .btn-sm{display:none}
  .brand-text{font-size:15px;line-height:1.25}
  .foot-cols{padding-top:44px}
}

/* roulang page: category1 */
:root{
  --ink-900:#05080D;
  --ink-800:#0A1018;
  --ink-700:#111A25;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --t1:#E9F2F7;
  --t2:#9AACBB;
  --t3:#67788A;
  --brand:#26D6B5;
  --brand-700:#14A98E;
  --brand-2:#FF7A3D;
  --accent:#7B6CFF;
  --glow:0 0 0 1px rgba(38,214,181,.35), 0 10px 30px -10px rgba(38,214,181,.45);
  --r-card:16px;
  --r-img:14px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--ink-900);
  color:var(--t2);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  position:relative;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1000px;
  pointer-events:none;
  z-index:-1;
  background:
    radial-gradient(1000px 520px at 68% -12%, rgba(38,214,181,.10), transparent 70%),
    linear-gradient(to right, rgba(255,255,255,.02) 1px, transparent 1px) 0 0/64px 64px,
    linear-gradient(to bottom, rgba(255,255,255,.02) 1px, transparent 1px) 0 0/64px 64px;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .22s ease}
a:hover{color:#5CF0D6}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
h1,h2,h3,h4{margin:0 0 .5em;color:var(--t1);font-weight:700;letter-spacing:-.01em;line-height:1.3}
p{margin:0 0 1em}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
table{border-collapse:collapse}

/* Foundation 覆盖 */
body,html{background-color:var(--ink-900)}
.grid-container{max-width:1200px;padding-left:20px;padding-right:20px;margin-left:auto;margin-right:auto}
@media screen and (min-width:640px){
  .grid-container{padding-left:24px;padding-right:24px}
}
.button{background-color:var(--brand);color:#04110D;border-radius:999px}
.button:hover{background-color:#38E6C6}

/* 顶部导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(5,8,13,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{background:rgba(5,8,13,.92);border-bottom-color:var(--line)}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:10px;transition:padding .25s ease}
.site-header.is-scrolled .topbar{padding-top:8px;padding-bottom:6px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--t1);font-weight:800}
.logo:hover{color:var(--t1)}
.logo-mark{width:30px;height:30px;flex:0 0 30px}
.logo-text{font-size:17px;line-height:1.2;letter-spacing:.01em}
.topbar-actions{display:flex;align-items:center;gap:10px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 22px;border-radius:999px;
  font-size:15px;font-weight:650;line-height:1.2;border:1px solid transparent;
  cursor:pointer;text-align:center;
  transition:transform .2s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease;
}
.btn-primary{background-color:var(--brand);color:#04110D;box-shadow:var(--glow)}
.btn-primary:hover{background-color:#38E6C6;color:#04110D;box-shadow:0 0 0 1px rgba(38,214,181,.5),0 14px 36px -12px rgba(38,214,181,.6)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background-color:transparent;color:var(--t1);border-color:var(--line-strong);border-radius:12px}
.btn-ghost:hover{border-color:var(--brand);color:var(--t1);background-color:rgba(38,214,181,.06)}
.btn-sm{min-height:40px;padding:9px 18px;font-size:14px}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:14px}
.btn-link::after{content:"→";transition:transform .2s ease}
.btn-link:hover::after{transform:translateX(3px)}

/* chip 分段导航 */
.nav-wrap{position:relative;padding-bottom:10px}
.chip-nav{display:flex;gap:10px;overflow-x:auto;scrollbar-width:none;padding:2px 2px 4px}
.chip-nav::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;display:inline-flex;align-items:center;position:relative;
  padding:8px 16px;border-radius:999px;font-size:14px;color:var(--t2);
  border:1px solid var(--line);background-color:transparent;
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.chip:hover{color:var(--t1);border-color:var(--line-strong);background-color:rgba(255,255,255,.03)}
.chip.is-active{color:var(--t1);border-color:var(--brand);background-color:rgba(38,214,181,.12);padding-left:22px}
.chip.is-active::before{content:"";position:absolute;left:6px;top:50%;transform:translateY(-50%);width:4px;height:14px;border-radius:2px;background-color:var(--brand)}
@media screen and (max-width:1023px){
  .nav-wrap::after{content:"";position:absolute;right:0;top:0;bottom:0;width:32px;background:linear-gradient(90deg,rgba(5,8,13,0),rgba(5,8,13,.95));pointer-events:none}
}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-strong);background-color:transparent;color:var(--t1);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.mobile-menu{display:none;border-top:1px solid var(--line);background-color:rgba(10,16,24,.98)}
.mobile-menu.is-open{display:block}
.mobile-menu .mm-list{padding:6px 0 14px}
.mobile-menu a{display:block;padding:13px 2px;color:var(--t2);font-size:15px;border-bottom:1px solid var(--line)}
.mobile-menu li:last-child a{border-bottom:0}
.mobile-menu a.is-active{color:var(--brand)}
@media screen and (max-width:639px){
  .nav-wrap{display:none}
  .nav-toggle{display:inline-flex}
}
@media screen and (min-width:640px){
  .mobile-menu{display:none!important}
}

/* 面包屑 */
.crumb{padding:22px 0 0}
.crumb ol{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--t3)}
.crumb a{color:var(--t3)}
.crumb a:hover{color:var(--brand)}
.crumb li+li::before{content:"/";margin-right:8px;color:rgba(255,255,255,.2)}
.crumb li[aria-current]{color:var(--t2)}

/* Hero */
.hero-slim{position:relative;padding:34px 0 52px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:16px;
  font-size:12px;letter-spacing:.06em;color:var(--brand);
  border:1px solid rgba(38,214,181,.3);background-color:rgba(38,214,181,.08);
  border-radius:999px;padding:5px 12px;
}
.hero-title{font-size:clamp(28px,4vw,44px);font-weight:800;line-height:1.16;letter-spacing:-.01em;margin-bottom:14px}
.hero-lede{font-size:16px;color:var(--t2);max-width:520px;margin-bottom:24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero-media{
  margin-top:28px;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:0 0 0 1px rgba(255,255,255,.04),0 28px 60px -32px rgba(0,0,0,.95);
}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
@media screen and (min-width:1024px){
  .hero-slim{padding:52px 0 64px}
  .hero-media{margin-top:0}
}

/* 数据横条 */
.stat-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:26px 0}
.stat-item{padding-top:12px;padding-bottom:12px}
.stat-num{font-size:clamp(26px,3vw,40px);font-weight:800;line-height:1.1;color:var(--brand-2);font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.stat-num small{font-size:.45em;font-weight:600;margin-left:4px;color:var(--t2);letter-spacing:0}
.stat-label{font-size:13px;color:var(--t3);margin:8px 0 0}
@media screen and (min-width:1024px){
  .stat-item{border-left:1px solid var(--line)}
  .stat-item:first-child{border-left:0}
}
@media screen and (min-width:640px) and (max-width:1023px){
  .stat-item:nth-child(even){border-left:1px solid var(--line)}
}

/* 区块 */
.section{padding:58px 0}
@media screen and (min-width:1024px){
  .section{padding:86px 0}
}
.section-head{max-width:720px;margin-bottom:34px}
.section-title{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.28;margin-bottom:12px}
.section-lede{color:var(--t2);font-size:15px;margin:0}

/* 图文卡网格 */
.card-cell{margin-bottom:24px}
.data-card{
  height:100%;display:flex;flex-direction:column;
  background-color:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.data-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 20px 44px -26px rgba(0,0,0,.95)}
.card-media{position:relative;overflow:hidden;background-color:var(--ink-800)}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s ease}
.data-card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{font-size:18px;font-weight:650;line-height:1.4;margin:0}
.card-text{font-size:14px;line-height:1.7;color:var(--t2);margin:0}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:8px}
.tag{
  display:inline-flex;align-items:center;font-size:12px;line-height:1;
  padding:5px 10px;border-radius:999px;border:1px solid var(--line-strong);color:var(--t2);
}
.tag-brand{color:var(--brand);border-color:rgba(38,214,181,.4);background-color:rgba(38,214,181,.08)}
.tag-accent{color:#A79CFF;border-color:rgba(123,108,255,.42);background-color:rgba(123,108,255,.1)}
.tag-warm{color:var(--brand-2);border-color:rgba(255,122,61,.38);background-color:rgba(255,122,61,.08)}

/* 时间轴 */
.tl-row{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;position:relative}
.tl-row::before{content:"";position:absolute;left:8%;right:8%;top:18px;border-top:1px dashed rgba(255,255,255,.16)}
.tl-step{position:relative;padding-top:56px}
.tl-dot{
  position:absolute;top:0;left:0;width:38px;height:38px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;gap:0;
  font-size:14px;font-weight:700;color:var(--brand);
  background-color:var(--ink-800);border:1px solid rgba(38,214,181,.45);
  font-variant-numeric:tabular-nums;
}
.tl-step h3{font-size:17px;font-weight:650;margin-bottom:8px}
.tl-step p{font-size:14px;line-height:1.7;color:var(--t2);margin:0}
@media screen and (max-width:1023px){
  .tl-row{grid-template-columns:1fr;gap:0}
  .tl-row::before{left:18px;right:auto;top:6px;bottom:16px;border-top:0;border-left:1px dashed rgba(255,255,255,.16)}
  .tl-step{padding:0 0 26px 58px}
  .tl-step:last-child{padding-bottom:0}
  .tl-dot{top:0;left:0}
}

/* FAQ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:60px;padding:14px 16px;font-size:16px;font-weight:600;color:var(--t1);
  cursor:pointer;list-style:none;border-left:3px solid transparent;
  transition:background-color .2s ease,border-color .2s ease;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q:hover{background-color:rgba(255,255,255,.03)}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background-color:var(--brand);border-radius:2px;transition:transform .22s ease}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
details[open] .faq-icon::after{transform:scaleY(0)}
details[open] .faq-q{background-color:rgba(38,214,181,.06);border-left-color:var(--brand)}
.faq-a{padding:0 20px 20px;font-size:15px;line-height:1.8;color:var(--t2)}
.faq-a p{margin:0}

/* CTA 条 */
.cta-bar{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(38,214,181,.06),rgba(38,214,181,0));
}
.cta-inner{display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between;padding:40px 0}
.cta-title{font-size:clamp(20px,2.3vw,26px);font-weight:700;margin:0;max-width:620px}
.cta-note{font-size:14px;color:var(--t3);margin:8px 0 0}

/* 页脚 */
.site-footer{background-color:var(--ink-900);border-top:1px solid var(--line);padding:56px 0 28px}
.foot-cols{padding-bottom:22px}
.foot-col{margin-bottom:26px}
.foot-brand{font-size:17px;font-weight:800;color:var(--t1);margin:0 0 12px}
.foot-desc{font-size:13px;line-height:1.8;color:var(--t3);max-width:320px;margin:0}
.foot-col h3{font-size:14px;font-weight:600;color:var(--t1);margin:0 0 14px}
.foot-col ul li{font-size:13px;line-height:1.7;color:var(--t2);margin-bottom:10px}
.foot-col a{color:var(--t2);font-size:13px}
.foot-col a:hover{color:var(--brand)}
.foot-bottom{border-top:1px solid var(--line);padding-top:20px;display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between}
.foot-bottom p{margin:0;font-size:12px;color:var(--t3)}

/* roulang page: category2 */
:root{
  --ink-900:#05080D;
  --ink-800:#0A1018;
  --ink-700:#111A25;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --t1:#E9F2F7;
  --t2:#9AACBB;
  --t3:#67788A;
  --brand:#26D6B5;
  --brand-700:#14A98E;
  --brand-2:#FF7A3D;
  --accent:#7B6CFF;
  --glow:0 0 0 1px rgba(38,214,181,.35),0 10px 30px -10px rgba(38,214,181,.45);
  --r-card:16px;
  --r-img:14px;
  --r-btn:12px;
  --sp-section:88px;
  --font:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--t2);
  font-family:var(--font);
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--t1);text-decoration:none;transition:color .24s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input,select,textarea{font-family:inherit;font-size:15px;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.num{font-variant-numeric:tabular-nums;font-weight:700;}

/* ---------- layout ---------- */
.grid-container{max-width:1200px;padding-left:20px;padding-right:20px;margin:0 auto;}
.section{padding:var(--sp-section) 0;}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{margin-bottom:32px;}
.sec-head h2{font-size:clamp(22px,2.6vw,34px);font-weight:700;line-height:1.25;color:var(--t1);letter-spacing:-.01em;}
.sec-head p{margin-top:10px;color:var(--t2);max-width:660px;font-size:15px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;color:var(--brand);text-transform:uppercase;margin-bottom:14px;}
.eyebrow::before{content:"";width:20px;height:1px;background:var(--brand);display:block;}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,13,.55);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:background .25s ease,padding .25s ease;
}
.site-head.is-scrolled{background:rgba(5,8,13,.82);}
.head-top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:12px;transition:padding .25s ease;}
.site-head.is-scrolled .head-top{padding-top:8px;padding-bottom:8px;}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;color:var(--t1);letter-spacing:-.01em;}
.logo:hover{color:var(--t1);}
.logo-mark{width:30px;height:30px;flex:0 0 30px;display:block;}
.logo-txt b{color:var(--brand);font-weight:800;}
.head-actions{display:flex;align-items:center;gap:10px;}

.chip-nav{
  display:flex;align-items:center;gap:8px;
  padding:8px 0 12px;
  overflow-x:auto;overflow-y:hidden;
  scrollbar-width:none;-ms-overflow-style:none;
  -webkit-overflow-scrolling:touch;
  mask-image:linear-gradient(to right,#000 0,#000 calc(100% - 32px),transparent 100%);
  -webkit-mask-image:linear-gradient(to right,#000 0,#000 calc(100% - 32px),transparent 100%);
}
.chip-nav::-webkit-scrollbar{display:none;}
.chip{
  position:relative;flex:0 0 auto;
  display:inline-flex;align-items:center;
  height:36px;padding:0 16px;border-radius:999px;
  font-size:13.5px;color:var(--t2);white-space:nowrap;
  border:1px solid var(--line);background:transparent;
  transition:color .22s ease,border-color .22s ease,background .22s ease;
}
.chip:hover{color:var(--t1);border-color:var(--line-strong);background:rgba(255,255,255,.03);}
.chip.is-active{
  color:var(--t1);background:rgba(38,214,181,.12);border-color:rgba(38,214,181,.55);
  padding-left:20px;
}
.chip.is-active::before{
  content:"";position:absolute;left:9px;top:50%;transform:translateY(-50%);
  width:4px;height:16px;border-radius:2px;background:var(--brand);
}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);background:transparent;color:var(--t1);align-items:center;justify-content:center;}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--t1);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--t1);}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.nav-drawer{display:none;border-top:1px solid var(--line);background:rgba(5,8,13,.96);padding:10px 0 16px;}
.nav-drawer.is-open{display:block;}
.nav-drawer a{display:block;padding:13px 20px;font-size:15px;color:var(--t2);border-bottom:1px solid var(--line);}
.nav-drawer a.is-active{color:var(--brand);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:999px;
  font-size:14.5px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;
  transition:filter .22s ease,box-shadow .24s ease,transform .16s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--brand);color:#04201B;box-shadow:var(--glow);}
.btn-primary:hover{color:#04201B;filter:brightness(1.06);box-shadow:0 0 0 1px rgba(38,214,181,.5),0 14px 34px -10px rgba(38,214,181,.6);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--t1);border-radius:var(--r-btn);}
.btn-ghost:hover{color:var(--t1);border-color:var(--brand);background:rgba(38,214,181,.08);}
.btn-sm{height:40px;padding:0 18px;font-size:13.5px;}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;color:var(--brand);}
.btn-text:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}

/* ---------- chips / tags ---------- */
.tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;letter-spacing:.02em;border:1px solid;}
.tag-brand{color:var(--brand);border-color:rgba(38,214,181,.45);background:rgba(38,214,181,.08);}
.tag-accent{color:#B7AEFF;border-color:rgba(123,108,255,.45);background:rgba(123,108,255,.1);}
.tag-orange{color:var(--brand-2);border-color:rgba(255,122,61,.45);background:rgba(255,122,61,.08);}

/* ---------- breadcrumb ---------- */
.crumb{padding-top:22px;font-size:13px;color:var(--t3);}
.crumb a{color:var(--t3);}
.crumb a:hover{color:var(--brand);}
.crumb span.sep{padding:0 8px;color:var(--t3);}
.crumb .cur{color:var(--t2);}

/* ---------- hero ---------- */
.hero-cat{position:relative;overflow:hidden;padding:40px 0 0;}
.hero-cat::before{
  content:"";position:absolute;top:-160px;left:-8%;width:620px;height:520px;
  background:radial-gradient(circle at 40% 40%,rgba(38,214,181,.14),transparent 66%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;gap:28px;align-items:center;padding-bottom:56px;}
.hero-cat h1{
  font-size:clamp(28px,3.9vw,44px);font-weight:800;line-height:1.16;letter-spacing:-.01em;color:var(--t1);
}
.hero-cat h1 em{font-style:normal;color:var(--brand);}
.hero-sub{margin-top:14px;font-size:16px;color:var(--t2);max-width:560px;}
.hero-acts{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;}
.hero-facts{margin-top:26px;display:flex;flex-wrap:wrap;gap:10px;}
.hero-media{position:relative;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line-strong);}
.hero-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,8,13,0) 42%,rgba(5,8,13,.72) 100%);}
.media-chip{
  position:absolute;left:14px;bottom:14px;z-index:2;
  display:inline-flex;align-items:center;gap:7px;
  height:28px;padding:0 12px;border-radius:999px;font-size:12px;
  background:rgba(5,8,13,.66);border:1px solid var(--line-strong);color:var(--t1);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.media-chip i{width:6px;height:6px;border-radius:50%;background:var(--brand);display:block;}

/* ---------- main body split ---------- */
.split-main{display:block;}
.panel{
  background:var(--ink-700);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;position:relative;
}
.panel-top{position:relative;}
.panel-top::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;border-radius:16px 16px 0 0;background:linear-gradient(90deg,var(--brand),rgba(38,214,181,0));}
.panel h3{font-size:19px;font-weight:650;color:var(--t1);line-height:1.4;}

.row-list{margin-top:6px;}
.row-list > li{border-bottom:1px solid var(--line);}
.row-list > li:last-child{border-bottom:0;}
.row-item{display:grid;grid-template-columns:52px 1fr;gap:16px;padding:22px 4px;transition:background .22s ease;}
.row-item:hover{background:rgba(255,255,255,.03);}
.row-idx{
  font-size:20px;font-weight:800;color:var(--brand);letter-spacing:.02em;
  font-variant-numeric:tabular-nums;line-height:1.2;padding-top:2px;
}
.row-body h3{font-size:18px;font-weight:650;color:var(--t1);line-height:1.4;}
.row-body p{margin-top:8px;font-size:14.5px;color:var(--t2);}
.row-meta{margin-top:12px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.row-meta time{font-size:12.5px;color:var(--t3);font-variant-numeric:tabular-nums;}

.side-stack{display:flex;flex-direction:column;gap:20px;}
.side-stack .sticky-wrap{position:sticky;top:120px;display:flex;flex-direction:column;gap:20px;}
.side-list li{display:flex;align-items:flex-start;gap:10px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--t2);}
.side-list li:last-child{border-bottom:0;}
.side-list b{color:var(--t1);font-weight:600;font-variant-numeric:tabular-nums;min-width:74px;display:inline-block;}
.side-list i{width:6px;height:6px;border-radius:50%;background:var(--brand);flex:0 0 6px;margin-top:9px;}
.cta-card{
  background:linear-gradient(160deg,rgba(38,214,181,.12),rgba(5,8,13,0) 62%),var(--ink-700);
  border:1px solid rgba(38,214,181,.34);border-radius:var(--r-card);padding:24px;
}
.cta-card h3{font-size:18px;font-weight:650;color:var(--t1);}
.cta-card p{margin-top:10px;font-size:14px;color:var(--t2);}
.cta-card .btn{margin-top:18px;width:100%;}

/* ---------- coverage rows ---------- */
.cover-row{
  display:grid;grid-template-columns:220px 1fr;gap:24px;align-items:center;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.cover-row:first-child{border-top:1px solid var(--line);}
.cover-key{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.cover-key strong{font-size:16px;color:var(--t1);font-weight:650;}
.cover-row p{font-size:14.5px;color:var(--t2);}

/* ---------- faq ---------- */
.faq-wrap{display:grid;gap:26px;}
.faq-item{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--ink-700);margin-bottom:12px;transition:border-color .22s ease;}
.faq-item.is-open{border-color:rgba(38,214,181,.45);background:rgba(38,214,181,.06);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
  background:transparent;border:0;color:var(--t1);
  font-size:16px;font-weight:600;text-align:left;
  min-height:56px;padding:16px 18px;position:relative;
}
.faq-item.is-open .faq-q::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:0 3px 3px 0;background:var(--brand);}
.faq-ico{position:relative;width:14px;height:14px;flex:0 0 14px;}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;background:var(--brand);transition:transform .24s ease,opacity .24s ease;}
.faq-ico::before{left:0;top:6px;width:14px;height:2px;}
.faq-ico::after{left:6px;top:0;width:2px;height:14px;}
.faq-item.is-open .faq-ico::after{transform:scaleY(0);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a p{padding:0 18px 18px;font-size:14.5px;line-height:1.85;color:var(--t2);}

/* ---------- cta bar ---------- */
.cta-bar{
  display:grid;gap:18px;align-items:center;
  background:var(--ink-700);border:1px solid var(--line-strong);border-radius:var(--r-card);
  padding:26px 28px;position:relative;overflow:hidden;
}
.cta-bar::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand);}
.cta-bar h2{font-size:clamp(19px,2vw,24px);color:var(--t1);font-weight:700;}
.cta-bar p{margin-top:8px;font-size:14.5px;color:var(--t2);}

/* ---------- footer ---------- */
.site-footer{background:var(--ink-900);border-top:1px solid var(--line);padding:56px 0 24px;margin-top:0;}
.foot-cols{padding-bottom:34px;}
.foot-col{margin-bottom:26px;}
.foot-brand{font-size:18px;font-weight:800;color:var(--t1);}
.foot-desc{margin-top:12px;font-size:13.5px;color:var(--t3);line-height:1.85;max-width:320px;}
.foot-col h3{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:14px;}
.foot-col ul li{font-size:13px;color:var(--t2);line-height:1.9;margin-bottom:6px;}
.foot-col ul li a{font-size:13px;color:var(--t2);}
.foot-col ul li a:hover{color:var(--brand);}
.foot-bottom{border-top:1px solid var(--line);padding-top:18px;display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;}
.foot-bottom p{font-size:12.5px;color:var(--t3);}

/* ---------- responsive ---------- */
@media screen and (min-width:640px){
  .grid-container{padding-left:24px;padding-right:24px;}
  .hero-media img{aspect-ratio:16/10;}
  .cta-bar{grid-template-columns:1fr auto;padding:28px 32px;}
  .cover-row{grid-template-columns:240px 1fr;}
}
@media screen and (max-width:1023px){
  :root{--sp-section:64px;}
  .side-stack .sticky-wrap{position:static;}
  .split-main .cell{margin-bottom:24px;}
  .split-main .cell:last-child{margin-bottom:0;}
}
@media screen and (max-width:1023px) and (min-width:640px){
  .hero-grid{grid-template-columns:1fr;}
}
@media screen and (min-width:1024px){
  :root{--sp-section:88px;}
  .hero-grid{grid-template-columns:7.4fr 5.6fr;}
  .split-main{display:grid;grid-template-columns:8fr 4fr;gap:24px;align-items:start;}
  .faq-wrap{grid-template-columns:4fr 8fr;gap:36px;}
}
@media screen and (max-width:639px){
  :root{--sp-section:52px;}
  .logo{font-size:17px;}
  .head-actions .btn{display:none;}
  .nav-toggle{display:inline-flex;}
  .hero-cat{padding-top:26px;}
  .hero-media img{aspect-ratio:16/9;}
  .row-item{grid-template-columns:40px 1fr;gap:12px;padding:18px 2px;}
  .row-idx{font-size:17px;}
  .cover-row{grid-template-columns:1fr;gap:10px;}
  .cta-bar{padding:22px;}
  .faq-q{font-size:15px;padding:14px 16px;}
  .faq-a p{padding:0 16px 16px;}
}

/* roulang page: category3 */
:root{
  --ink-900:#05080D;
  --ink-800:#0A1018;
  --ink-700:#111A25;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --t1:#E9F2F7;
  --t2:#9AACBB;
  --t3:#67788A;
  --brand:#26D6B5;
  --brand-700:#14A98E;
  --brand-2:#FF7A3D;
  --accent:#7B6CFF;
  --glow:0 0 0 1px rgba(38,214,181,.35), 0 10px 30px -10px rgba(38,214,181,.45);
  --r-card:16px;
  --r-img:14px;
  --maxw:1200px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--t2);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  top:-260px;left:50%;
  width:1100px;height:640px;
  transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(38,214,181,.10),rgba(38,214,181,0) 72%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--brand);text-decoration:none;transition:color .22s ease;}
a:hover{color:#5ff0d6;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.grid-container{max-width:var(--maxw);width:100%;padding-left:24px;padding-right:24px;margin:0 auto;}
.grid-container.fluid{max-width:100%;}
::selection{background:rgba(38,214,181,.28);color:#fff;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;
  padding:11px 22px;
  border-radius:999px;
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:filter .22s ease,box-shadow .24s ease,transform .2s ease,background-color .22s ease,color .22s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#04120F;box-shadow:var(--glow);}
.btn-primary:hover{filter:brightness(1.06);color:#04120F;box-shadow:0 0 0 1px rgba(38,214,181,.5),0 14px 36px -12px rgba(38,214,181,.6);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;color:var(--t1);border-color:var(--line-strong);border-radius:12px;}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);background:rgba(38,214,181,.06);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{min-height:40px;padding:9px 18px;font-size:14px;}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14px;font-weight:600;border:0;background:none;padding:6px 0;cursor:pointer;}
.btn-link:hover{gap:10px;}
.btn-link svg{transition:transform .22s ease;}
.btn-link:hover svg{transform:translateX(3px);}

/* ---------- 标签 / chip ---------- */
.tag{
  display:inline-flex;align-items:center;
  padding:4px 12px;
  border-radius:999px;
  font-size:12px;
  line-height:1.6;
  border:1px solid var(--line-strong);
  color:var(--t2);
  background:rgba(255,255,255,.02);
}
.tag-brand{color:var(--brand);border-color:rgba(38,214,181,.42);background:rgba(38,214,181,.08);}
.tag-accent{color:#AFA4FF;border-color:rgba(123,108,255,.42);background:rgba(123,108,255,.1);}
.tag-orange{color:var(--brand-2);border-color:rgba(255,122,61,.4);background:rgba(255,122,61,.09);}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,8,13,.55);
  border-bottom:1px solid transparent;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  transition:background-color .26s ease,border-color .26s ease,padding .26s ease;
}
.site-header.is-scrolled{background:rgba(5,8,13,.86);border-bottom-color:var(--line);}
.header-top{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:16px 0 14px;
  transition:padding .26s ease;
}
.site-header.is-scrolled .header-top{padding:10px 0 9px;}
.brand{display:flex;align-items:center;gap:12px;color:var(--t1);}
.brand:hover{color:var(--t1);}
.brand-mark{
  width:32px;height:32px;flex:0 0 32px;
  border-radius:10px;
  background:linear-gradient(160deg,rgba(38,214,181,.22),rgba(123,108,255,.18));
  border:1px solid rgba(38,214,181,.36);
  display:flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:18px;height:18px;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:17px;font-weight:800;letter-spacing:.01em;color:var(--t1);}
.brand-text em{font-style:normal;font-size:11px;color:var(--t3);letter-spacing:.04em;}
.header-actions{display:flex;align-items:center;gap:12px;}
.menu-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line-strong);
  background:transparent;
  cursor:pointer;
  padding:0;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--t1);border-radius:2px;transition:transform .22s ease,opacity .22s ease;}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.chip-bar{border-top:1px solid var(--line);background:rgba(10,16,24,.5);}
.chip-scroll{
  position:relative;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  padding-top:10px;padding-bottom:10px;
  -webkit-overflow-scrolling:touch;
}
.chip-scroll::-webkit-scrollbar{display:none;}
.chip-nav{display:flex;gap:10px;white-space:nowrap;}
.chip{
  position:relative;
  display:inline-flex;align-items:center;
  padding:9px 16px;
  border-radius:999px;
  font-size:13.5px;
  color:var(--t2);
  border:1px solid var(--line);
  background:transparent;
  transition:color .22s ease,border-color .22s ease,background-color .22s ease;
}
.chip:hover{color:var(--t1);border-color:var(--line-strong);background:rgba(255,255,255,.03);}
.chip.is-active{
  color:var(--t1);
  background:rgba(38,214,181,.12);
  border-color:rgba(38,214,181,.75);
  padding-left:22px;
}
.chip.is-active::before{
  content:"";position:absolute;left:9px;top:50%;transform:translateY(-50%);
  width:4px;height:16px;border-radius:2px;background:var(--brand);
}
.mobile-menu{
  display:none;
  border-top:1px solid var(--line);
  background:rgba(5,8,13,.96);
  padding:12px 0 18px;
}
.mobile-menu.is-open{display:block;}
.mobile-menu a{
  display:block;padding:12px 24px;color:var(--t2);font-size:15px;border-bottom:1px solid var(--line);
}
.mobile-menu a:hover,.mobile-menu a.is-active{color:var(--brand);background:rgba(38,214,181,.05);}
.mobile-menu a.is-active{font-weight:600;}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;position:relative;z-index:1;}
.section.tight{padding:64px 0;}
.section-alt{background:var(--ink-800);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{
  font-size:clamp(22px,2.6vw,34px);
  font-weight:700;line-height:1.25;color:var(--t1);
  letter-spacing:-.005em;
}
.section-head p{margin-top:12px;color:var(--t2);font-size:15.5px;line-height:1.8;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;color:var(--brand);
  text-transform:uppercase;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);opacity:.7;}

/* ---------- 面包屑 ---------- */
.crumb{
  padding:20px 0 4px;
  font-size:13px;color:var(--t3);
  position:relative;z-index:1;
}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
.crumb li{display:inline-flex;align-items:center;gap:8px;}
.crumb li + li::before{content:"/";color:var(--t3);}
.crumb a{color:var(--t3);}
.crumb a:hover{color:var(--brand);}
.crumb .current{color:var(--t2);}

/* ---------- Hero ---------- */
.hero{position:relative;z-index:1;padding:34px 0 76px;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.hero h1{
  font-size:clamp(30px,4.2vw,46px);
  font-weight:800;line-height:1.16;letter-spacing:-.01em;
  color:var(--t1);
}
.hero-lead{margin-top:18px;font-size:16.5px;color:var(--t2);max-width:520px;line-height:1.85;}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border:1px solid var(--line-strong);
  box-shadow:0 26px 70px -34px rgba(0,0,0,.9);
}
.hero-media::after{
  content:"";
  position:absolute;inset:0;
  border-radius:var(--r-img);
  background:linear-gradient(200deg,rgba(38,214,181,.14),rgba(5,8,13,.62) 72%);
  pointer-events:none;
}
.hero-chip{
  position:absolute;right:16px;bottom:16px;
  padding:7px 14px;border-radius:999px;
  background:rgba(5,8,13,.72);
  border:1px solid rgba(38,214,181,.5);
  backdrop-filter:blur(14px);
  color:var(--brand);font-size:12.5px;font-weight:600;
  z-index:2;
}
.hero-note{
  display:inline-flex;align-items:center;gap:10px;
  margin-top:26px;padding:10px 16px;border-radius:999px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  backdrop-filter:blur(14px);
  font-size:13px;color:var(--t2);
}
.hero-note .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px rgba(38,214,181,.8);}

/* ---------- 图文交替区块 ---------- */
.feature{
  display:grid;grid-template-columns:1fr 1fr;
  gap:56px;align-items:center;
  padding:34px 0;
}
.feature + .feature{border-top:1px solid var(--line);}
.feature.rev .feature-media{order:2;}
.feature.rev .feature-body{order:1;}
.feature-media{position:relative;}
.feature-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line-strong);}
.feature-media .media-tag{
  position:absolute;left:16px;top:16px;
  padding:5px 12px;border-radius:999px;
  background:rgba(5,8,13,.78);
  border:1px solid rgba(123,108,255,.5);
  color:#AFA4FF;font-size:12px;font-weight:600;
}
.feature-body h3{
  font-size:clamp(20px,2.1vw,26px);
  font-weight:700;color:var(--t1);line-height:1.35;
  margin-bottom:14px;
}
.feature-body p{font-size:15.5px;line-height:1.85;color:var(--t2);}
.point-list{margin-top:20px;display:grid;gap:10px;}
.point-list li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14.5px;color:var(--t2);line-height:1.75;
}
.point-list li::before{
  content:"";flex:0 0 6px;width:6px;height:6px;border-radius:50%;
  background:var(--brand);margin-top:9px;
}
.stat-strip{
  margin-top:26px;
  display:flex;flex-wrap:wrap;gap:28px;
  padding:18px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stat-strip .stat-item{min-width:120px;}
.stat-strip .num{
  font-size:clamp(26px,3vw,34px);
  font-weight:800;color:var(--brand-2);
  font-variant-numeric:tabular-nums;
  line-height:1.1;
  letter-spacing:-.01em;
}
.stat-strip .num small{font-size:14px;font-weight:700;margin-left:3px;color:var(--brand-2);}
.stat-strip .cap{margin-top:6px;font-size:13px;color:var(--t3);line-height:1.5;}

/* ---------- 场景区 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:34px;}
.scene-card{
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px 24px;
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.scene-card:hover{transform:translateY(-3px);border-color:var(--line-strong);box-shadow:0 18px 40px -26px rgba(38,214,181,.5);}
.scene-card h3{font-size:17px;font-weight:650;color:var(--t1);line-height:1.4;margin-bottom:10px;}
.scene-card p{font-size:14.5px;color:var(--t2);line-height:1.8;}
.scene-card .tag{margin-bottom:14px;}
.chip-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px;}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:1fr 1.7fr;gap:44px;align-items:start;}
.faq-side h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;color:var(--t1);line-height:1.3;}
.faq-side p{margin-top:14px;color:var(--t2);font-size:15px;line-height:1.85;}
.faq-side .btn{margin-top:24px;}
.faq-list{display:grid;gap:12px;}
.faq-item{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:14px;
  overflow:hidden;
  transition:border-color .22s ease;
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item summary{
  list-style:none;cursor:pointer;
  min-height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:16px 22px;
  font-size:16px;font-weight:600;color:var(--t1);line-height:1.5;
  transition:background-color .22s ease,padding .22s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";color:var(--brand);font-size:20px;line-height:1;flex:0 0 auto;transition:transform .24s ease;}
.faq-item[open] summary::after{content:"−";}
.faq-item[open] summary{background:rgba(38,214,181,.06);border-left:3px solid var(--brand);padding-left:19px;}
.faq-body{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--t2);}

/* ---------- CTA 条 ---------- */
.cta-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  padding:30px 34px;
  border-radius:var(--r-card);
  background:linear-gradient(120deg,rgba(38,214,181,.10),rgba(10,16,24,.94) 60%);
  border:1px solid rgba(38,214,181,.3);
}
.cta-bar .cta-text strong{display:block;font-size:19px;color:var(--t1);font-weight:700;line-height:1.4;}
.cta-bar .cta-text span{display:block;margin-top:8px;font-size:14px;color:var(--t2);}
.cta-bar .cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 表单卡（CTA 联系） ---------- */
.contact-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  border-radius:20px;
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.04);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  overflow:hidden;
}
.contact-info{padding:40px 38px;}
.contact-info h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--t1);line-height:1.3;}
.contact-info > p{margin-top:14px;font-size:15px;color:var(--t2);line-height:1.85;}
.contact-lines{margin-top:28px;display:grid;gap:14px;}
.contact-lines li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--t2);}
.contact-lines .ico{
  flex:0 0 26px;width:26px;height:26px;border-radius:8px;
  background:rgba(38,214,181,.12);border:1px solid rgba(38,214,181,.36);
  display:flex;align-items:center;justify-content:center;
}
.contact-lines .ico svg{width:13px;height:13px;}
.contact-form{padding:40px 38px;border-left:1px solid var(--line);display:grid;gap:16px;}
.field label{display:block;font-size:13px;color:var(--t3);margin-bottom:8px;letter-spacing:.02em;}
.field input,.field select,.field textarea{
  width:100%;
  background:rgba(5,8,13,.72);
  border:1px solid var(--line);
  border-radius:12px;
  color:var(--t1);
  font-size:15px;
  padding:12px 14px;
  min-height:46px;
  font-family:inherit;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--t3);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 1px rgba(38,214,181,.4),0 0 22px -8px rgba(38,214,181,.6);
}
.form-hint{font-size:12.5px;color:var(--t3);}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding:64px 0 26px;
  position:relative;z-index:1;
}
.foot-cols{padding-bottom:8px;}
.foot-col{margin-bottom:30px;}
.foot-brand{font-size:17px;font-weight:800;color:var(--t1);letter-spacing:.01em;}
.foot-desc{margin-top:14px;font-size:13.5px;color:var(--t3);line-height:1.85;max-width:340px;}
.foot-col h3{font-size:14px;font-weight:600;color:var(--t1);margin-bottom:16px;letter-spacing:.02em;}
.foot-col ul{display:grid;gap:11px;}
.foot-col li{font-size:13px;color:var(--t3);line-height:1.7;}
.foot-col a{color:var(--t2);font-size:13px;}
.foot-col a:hover{color:var(--brand);}
.foot-bottom{
  margin-top:26px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
}
.foot-bottom p{font-size:12.5px;color:var(--t3);}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1023px){
  .section{padding:64px 0;}
  .hero{padding:22px 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:34px;}
  .hero-media{max-width:640px;}
  .feature{grid-template-columns:1fr;gap:30px;padding:30px 0;}
  .feature.rev .feature-media{order:0;}
  .feature.rev .feature-body{order:0;}
  .faq-layout{grid-template-columns:1fr;gap:28px;}
  .contact-wrap{grid-template-columns:1fr;}
  .contact-form{border-left:0;border-top:1px solid var(--line);}
  .brand-text em{display:none;}
}
@media screen and (max-width:767px){
  .grid-container{padding-left:20px;padding-right:20px;}
  .section{padding:52px 0;}
  .section-head{margin-bottom:28px;}
  .header-actions .btn-primary{display:none;}
  .menu-toggle{display:flex;}
  .brand-text strong{font-size:15.5px;}
  .hero h1{font-size:clamp(26px,7.4vw,34px);}
  .hero-lead{font-size:15.5px;}
  .hero-media img{aspect-ratio:16/9;}
  .hero-chip{right:12px;bottom:12px;}
  .chip-scroll{
    -webkit-mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 32px),transparent 100%);
    mask-image:linear-gradient(90deg,#000 0,#000 calc(100% - 32px),transparent 100%);
  }
  .scene-grid{grid-template-columns:1fr;}
  .stat-strip{gap:20px 28px;}
  .stat-strip .stat-item{min-width:104px;flex:1 1 40%;}
  .cta-bar{padding:24px 22px;}
  .contact-info,.contact-form{padding:28px 22px;}
  .feature-media .media-tag{left:12px;top:12px;}
  .foot-bottom{flex-direction:column;}
  .section-title-mobile{font-size:20px;}
}
@media screen and (max-width:519px){
  .btn{width:100%;justify-content:center;}
  .hero-cta .btn{width:100%;}
  .cta-bar .cta-actions{width:100%;}
  .cta-bar .cta-actions .btn{width:100%;}
  .header-actions .btn{width:auto;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category4 */
:root{
  --ink-900:#05080D;
  --ink-800:#0A1018;
  --ink-700:#111A25;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --t1:#E9F2F7;
  --t2:#9AACBB;
  --t3:#67788A;
  --brand:#26D6B5;
  --brand-700:#14A98E;
  --brand-2:#FF7A3D;
  --accent:#7B6CFF;
  --glow:0 0 0 1px rgba(38,214,181,.35), 0 10px 30px -10px rgba(38,214,181,.45);
  --r-card:16px;
  --r-img:14px;
  --r-input:12px;
  --font:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--t2);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .24s ease;}
a:hover{color:var(--t1);}
h1,h2,h3,h4,p,figure,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
h1,h2,h3,h4{color:var(--t1);}
strong{color:var(--t1);font-weight:700;}
.grid-container{max-width:1200px;padding-left:20px;padding-right:20px;margin:0 auto;}
@media (min-width:640px){
  .grid-container{padding-left:24px;padding-right:24px;}
}
.section{padding:52px 0;}
@media (min-width:640px){.section{padding:64px 0;}}
@media (min-width:1024px){.section{padding:88px 0;}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(5,8,13,.62);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .26s ease,border-color .26s ease;
}
.site-header.is-stuck{
  background:rgba(5,8,13,.86);
  border-bottom-color:var(--line);
}
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:70px;
  transition:height .26s ease;
}
.site-header.is-stuck .topbar{height:62px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--t1);
  font-size:18px;
  font-weight:800;
  letter-spacing:-.01em;
}
.brand:hover{color:var(--t1);}
.brand-mark{
  width:30px;height:30px;
  border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,rgba(38,214,181,.22),rgba(123,108,255,.16));
  border:1px solid var(--line-strong);
  flex:0 0 auto;
}
.brand-mark svg{width:18px;height:18px;display:block;}
.brand-text{white-space:nowrap;}
.topbar-right{display:flex;align-items:center;gap:10px;}
.menu-btn{
  display:none;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line-strong);
  background:transparent;
  color:var(--t1);
  cursor:pointer;
  align-items:center;
  justify-content:center;
  transition:border-color .22s ease,background .22s ease;
}
.menu-btn:hover{border-color:var(--brand);background:rgba(38,214,181,.08);}
.menu-btn span{display:block;width:16px;height:2px;background:currentColor;border-radius:2px;position:relative;}
.menu-btn span::before,.menu-btn span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:currentColor;border-radius:2px;
}
.menu-btn span::before{top:-5px;}
.menu-btn span::after{top:5px;}

.chipbar{
  position:relative;
  border-top:1px solid var(--line);
}
.chipbar::after{
  content:"";
  position:absolute;
  top:1px;right:0;bottom:0;
  width:34px;
  pointer-events:none;
  background:linear-gradient(90deg,rgba(5,8,13,0),rgba(5,8,13,.92));
}
.chip-nav{
  display:flex;
  align-items:center;
  gap:8px;
  padding:10px 0 12px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.chip-nav::-webkit-scrollbar{display:none;}
.chip{
  position:relative;
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:8px 15px;
  min-height:38px;
  border-radius:999px;
  border:1px solid var(--line);
  background:transparent;
  color:var(--t2);
  font-size:13.5px;
  white-space:nowrap;
  transition:color .22s ease,border-color .22s ease,background .22s ease;
}
.chip:hover{color:var(--t1);border-color:var(--line-strong);background:rgba(255,255,255,.03);}
.chip.is-active{
  color:var(--t1);
  border-color:rgba(38,214,181,.55);
  background:rgba(38,214,181,.12);
  padding-left:17px;
  font-weight:600;
}
.chip.is-active::before{
  content:"";
  position:absolute;
  left:6px;top:50%;
  transform:translateY(-50%);
  width:4px;height:16px;
  border-radius:3px;
  background:var(--brand);
}
@media (max-width:639px){
  .menu-btn{display:inline-flex;}
  .chipbar{max-height:none;}
  .chip-nav{flex-wrap:nowrap;}
  .chip-nav.is-open{
    flex-wrap:wrap;
    overflow-x:visible;
  }
  .chip-nav.is-open .chip{flex:1 1 100%;justify-content:flex-start;}
}

/* ---------- 通用按钮 / 标签 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:12px 22px;
  border-radius:999px;
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:filter .22s ease,box-shadow .24s ease,transform .18s ease,border-color .22s ease,color .22s ease,background .22s ease;
}
.btn-primary{
  background:var(--brand);
  color:#04120F;
  box-shadow:var(--glow);
}
.btn-primary:hover{
  filter:brightness(1.06);
  box-shadow:0 0 0 1px rgba(38,214,181,.5),0 14px 34px -10px rgba(38,214,181,.6);
  color:#04120F;
}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--t1);
  border-radius:12px;
}
.btn-ghost:hover{
  border-color:var(--brand);
  color:var(--t1);
  background:rgba(38,214,181,.06);
}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{min-height:40px;padding:9px 18px;font-size:14px;}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  font-weight:600;
  color:var(--brand);
  border-bottom:1px solid transparent;
  padding-bottom:2px;
  transition:color .22s ease,border-color .22s ease;
}
.link-more::after{content:"→";transition:transform .22s ease;}
.link-more:hover{color:var(--t1);border-bottom-color:var(--brand);}
.link-more:hover::after{transform:translateX(3px);}

.chip-tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 11px;
  border-radius:999px;
  font-size:12px;
  border:1px solid var(--line-strong);
  color:var(--t2);
  background:rgba(255,255,255,.02);
  white-space:nowrap;
}
.tag-brand{color:var(--brand);border-color:rgba(38,214,181,.4);background:rgba(38,214,181,.1);}
.tag-accent{color:var(--accent);border-color:rgba(123,108,255,.42);background:rgba(123,108,255,.12);}
.tag-orange{color:var(--brand-2);border-color:rgba(255,122,61,.4);background:rgba(255,122,61,.1);}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px;
  font-size:13px;
  color:var(--t3);
  padding:24px 0 0;
}
.crumb a{color:var(--t3);}
.crumb a:hover{color:var(--brand);}
.crumb .cur{color:var(--t2);}
.crumb .sep{color:var(--t3);opacity:.6;}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding-bottom:52px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  top:-180px;left:8%;
  width:620px;height:620px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(38,214,181,.10),rgba(38,214,181,0) 66%);
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.28;
  pointer-events:none;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.6),transparent 72%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.6),transparent 72%);
}
.page-hero .grid-container{position:relative;z-index:2;}
.hero-row{padding-top:26px;}
.hero-kicker{margin-bottom:16px;}
.hero-title{
  font-size:clamp(28px,5vw,44px);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.01em;
  margin-bottom:16px;
}
.hero-sub{
  font-size:16px;
  color:var(--t2);
  max-width:520px;
  margin-bottom:26px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px;}
.hero-notes{display:flex;flex-wrap:wrap;gap:18px;}
.hero-note{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--t3);
}
.hero-note::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--brand);
  flex:0 0 auto;
}
.hero-media{
  position:relative;
  margin:0;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),0 24px 60px -30px rgba(0,0,0,.9);
  margin-top:32px;
}
.hero-media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
}
.hero-media figcaption{
  position:absolute;
  left:16px;bottom:16px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 14px;
  border-radius:999px;
  font-size:12.5px;
  color:var(--t1);
  background:rgba(5,8,13,.68);
  border:1px solid var(--line-strong);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
@media (min-width:1024px){
  .hero-media{margin-top:0;}
}

/* ---------- 板块标题 ---------- */
.sec-head{margin-bottom:34px;max-width:720px;}
.sec-head h2{
  font-size:clamp(22px,2.6vw,32px);
  font-weight:700;
  line-height:1.25;
  margin-bottom:12px;
}
.sec-head p{font-size:15.5px;color:var(--t2);}
.sec-head-row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
}

/* ---------- 数据横条 ---------- */
.stats-band{padding:0;}
.stats-grid{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stat{
  padding:30px 22px;
  border-left:1px solid var(--line);
}
.stat:first-child{border-left:0;}
.stat-num{
  font-size:clamp(30px,3.4vw,42px);
  font-weight:800;
  line-height:1.05;
  color:var(--brand-2);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
  display:flex;
  align-items:baseline;
  gap:4px;
}
.stat-num .unit{
  font-size:14px;
  font-weight:600;
  color:var(--t3);
  letter-spacing:0;
}
.stat-desc{font-size:13.5px;color:var(--t2);margin-top:8px;}
@media (max-width:1023px){
  .stat{border-left:0;border-top:1px solid var(--line);}
  .stat:first-child{border-top:0;}
}
@media (min-width:1024px){
  .stats-4 .cell:nth-child(4n+1) .stat{border-left:0;}
}

/* ---------- 紧凑列表 ---------- */
.tight-list{
  border-top:1px solid var(--line);
}
.tight-item{
  display:flex;
  align-items:flex-start;
  gap:16px;
  padding:18px 4px;
  min-height:48px;
  border-bottom:1px solid var(--line);
  transition:background .22s ease;
  border-radius:6px;
}
.tight-item:hover{background:rgba(255,255,255,.03);}
.tight-item .chip-tag{margin-top:3px;}
.tl-main{flex:1 1 auto;min-width:0;}
.tl-main h3{
  font-size:17px;
  font-weight:650;
  line-height:1.42;
  margin-bottom:6px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.tl-main h3 a{color:var(--t1);}
.tl-main h3 a:hover{color:var(--brand);}
.tl-meta{
  font-size:12.5px;
  color:var(--t3);
  font-variant-numeric:tabular-nums;
}
.list-cols .cell{margin-bottom:8px;}
.list-side-note{
  margin-top:22px;
  padding:20px;
  border-radius:var(--r-card);
  border:1px dashed var(--line-strong);
  background:var(--ink-800);
  font-size:14px;
  color:var(--t2);
}
.list-side-note strong{display:block;color:var(--t1);margin-bottom:6px;font-size:15px;}

/* ---------- 图文交替 ---------- */
.feature{margin-bottom:52px;}
.feature:last-child{margin-bottom:0;}
.feature-media{
  margin:0 0 24px;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line-strong);
}
.feature-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}
.feature h2{
  font-size:clamp(21px,2.3vw,28px);
  font-weight:700;
  line-height:1.3;
  margin-bottom:14px;
}
.feature p{font-size:15.5px;line-height:1.8;margin-bottom:18px;}
.mini-stats{
  display:flex;
  flex-wrap:wrap;
  gap:26px;
  padding:18px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  margin-bottom:20px;
}
.mini-stats li{display:flex;flex-direction:column;gap:2px;}
.mini-stats strong{
  font-size:24px;
  font-weight:800;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  line-height:1.1;
}
.mini-stats span{font-size:12.5px;color:var(--t3);}
@media (min-width:1024px){
  .feature-media{margin-bottom:0;}
  .feature-rev .feature-media{order:2;}
  .feature-rev .feature-text{order:1;}
}

/* ---------- FAQ ---------- */
.faq-head h2{
  font-size:clamp(22px,2.6vw,32px);
  font-weight:700;
  margin-bottom:12px;
}
.faq-head p{font-size:15px;margin-bottom:20px;}
.faq-head .faq-hint{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--t3);
  padding:8px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--ink-800);
}
.faq-item{
  border:1px solid var(--line);
  border-radius:14px;
  background:var(--ink-800);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .22s ease,background .22s ease;
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item[open]{
  border-color:var(--line-strong);
  background:rgba(38,214,181,.06);
  box-shadow:inset 3px 0 0 var(--brand);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:58px;
  padding:18px 20px;
  cursor:pointer;
  list-style:none;
  font-size:16px;
  font-weight:600;
  color:var(--t1);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"";
  flex:0 0 auto;
  width:9px;height:9px;
  border-right:2px solid var(--brand);
  border-bottom:2px solid var(--brand);
  transform:rotate(45deg);
  transition:transform .22s ease;
  margin-right:4px;
}
.faq-item[open] summary::after{transform:rotate(-135deg);}
.faq-ans{
  padding:0 20px 20px;
  border-top:1px solid var(--line);
  padding-top:14px;
  font-size:15px;
  line-height:1.8;
  color:var(--t2);
}

/* ---------- CTA 条 ---------- */
.cta-band{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:26px 28px;
  border-radius:var(--r-card);
  background:linear-gradient(120deg,rgba(38,214,181,.08),rgba(123,108,255,.06) 60%,rgba(255,122,61,.05));
  border:1px solid var(--line-strong);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
}
.cta-band p{
  font-size:16px;
  color:var(--t1);
  font-weight:600;
  max-width:640px;
  line-height:1.7;
}
.cta-band p span{display:block;font-size:13.5px;color:var(--t2);font-weight:400;margin-top:6px;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding:56px 0 26px;
  margin-top:8px;
}
.foot-cols{margin-bottom:34px;}
.foot-col{margin-bottom:26px;}
.foot-brand{
  font-size:18px;
  font-weight:800;
  color:var(--t1);
  margin-bottom:12px;
}
.foot-desc{font-size:13.5px;color:var(--t2);line-height:1.8;max-width:320px;}
.foot-col h3{
  font-size:14px;
  font-weight:600;
  color:var(--t1);
  margin-bottom:14px;
}
.foot-col ul li{
  font-size:13px;
  color:var(--t2);
  line-height:1.9;
}
.foot-col ul li a{color:var(--t2);}
.foot-col ul li a:hover{color:var(--brand);}
.foot-bottom{
  border-top:1px solid var(--line);
  padding-top:20px;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  font-size:12.5px;
  color:var(--t3);
}

/* roulang page: category5 */
/* ============ 1. 设计变量 ============ */
:root{
  --ink-900:#05080D;
  --ink-800:#0A1018;
  --ink-700:#111A25;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --t1:#E9F2F7;
  --t2:#9AACBB;
  --t3:#67788A;
  --brand:#26D6B5;
  --brand-700:#14A98E;
  --brand-2:#FF7A3D;
  --accent:#7B6CFF;
  --glow:0 0 0 1px rgba(38,214,181,.35),0 10px 30px -10px rgba(38,214,181,.45);
  --r-lg:16px;
  --r-md:14px;
  --r-sm:12px;
  --sec-lg:88px;
  --sec-md:64px;
  --sec-sm:52px;
  --ease:.24s ease;
}

/* ============ 2. 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--ink-900);
  background-image:radial-gradient(900px 520px at 80% -6%, rgba(38,214,181,.10), rgba(38,214,181,0) 62%);
  background-repeat:no-repeat;
  background-attachment:fixed;
  color:var(--t2);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto;border-radius:var(--r-md)}
a{color:var(--brand);text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease)}
a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
h1,h2,h3,h4{color:var(--t1);margin:0 0 12px;font-weight:700;letter-spacing:-.005em}
p{margin:0 0 12px}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.grid-container{max-width:1200px;padding-left:20px;padding-right:20px}
.grid-x{margin-left:-10px;margin-right:-10px}
.grid-x>.cell{padding-left:10px;padding-right:10px}
@media (min-width:1024px){
  .grid-x{margin-left:-12px;margin-right:-12px}
  .grid-x>.cell{padding-left:12px;padding-right:12px}
  .grid-container{padding-left:24px;padding-right:24px}
}

/* ============ 3. 通用组件 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 24px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;text-align:center;
  transition:background-color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease),color var(--ease);
}
.btn-primary{background:var(--brand);color:#04120E;box-shadow:var(--glow)}
.btn-primary:hover{background:#3AE3C4;color:#04120E;text-decoration:none;box-shadow:0 0 0 1px rgba(38,214,181,.5),0 14px 34px -12px rgba(38,214,181,.65)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--t1);border-radius:var(--r-sm)}
.btn-ghost:hover{border-color:var(--brand);color:var(--t1);background:rgba(38,214,181,.07);text-decoration:none}
.btn-sm{min-height:40px;padding:10px 18px;font-size:14px}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 11px;border-radius:999px;
  font-size:12px;line-height:1.4;
  border:1px solid var(--line-strong);color:var(--t2);
}
.tag-brand{border-color:rgba(38,214,181,.42);color:var(--brand);background:rgba(38,214,181,.09)}
.tag-accent{border-color:rgba(123,108,255,.42);color:#A99EFF;background:rgba(123,108,255,.11)}
.tag-orange{border-color:rgba(255,122,61,.42);color:var(--brand-2);background:rgba(255,122,61,.10)}
.sec-head{max-width:680px;margin-bottom:40px}
.sec-head h2{font-size:clamp(22px,2.6vw,34px);font-weight:700;line-height:1.25;margin-bottom:10px}
.sec-head p{font-size:15.5px;color:var(--t2);margin:0}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:18px;flex-wrap:wrap}
.breadcrumb a{color:var(--t3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--t3);opacity:.6}
.breadcrumb .current{color:var(--t2)}

/* ============ 4. 头部与导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color var(--ease),border-color var(--ease),backdrop-filter var(--ease);
}
.site-header.is-stuck{
  background:rgba(5,8,13,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0 14px;
  transition:padding var(--ease);
}
.site-header.is-stuck .topbar{padding:11px 0 9px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--t1);text-decoration:none}
.brand:hover{color:var(--t1);text-decoration:none}
.brand-mark{
  display:grid;place-items:center;flex:0 0 auto;
  width:32px;height:32px;border-radius:10px;
  background:rgba(38,214,181,.10);
  border:1px solid rgba(38,214,181,.30);
}
.brand-text{font-size:17px;font-weight:800;line-height:1.2;white-space:nowrap}
.topbar-right{display:flex;align-items:center;gap:10px}
.menu-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:transparent;border:1px solid var(--line-strong);color:var(--t1);
  cursor:pointer;transition:border-color var(--ease),background-color var(--ease);
}
.menu-toggle:hover{border-color:var(--brand);background:rgba(38,214,181,.07)}
.chip-nav{
  display:flex;gap:8px;
  padding:0 0 16px;
  overflow-x:auto;
  scrollbar-width:none;-ms-overflow-style:none;
}
.chip-nav::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;
  display:inline-flex;align-items:center;
  min-height:38px;padding:8px 16px;border-radius:999px;
  border:1px solid var(--line);
  color:var(--t2);font-size:13.5px;font-weight:500;line-height:1.2;
  white-space:nowrap;text-decoration:none;
  transition:color var(--ease),border-color var(--ease),background-color var(--ease),box-shadow var(--ease);
}
.chip:hover{color:var(--t1);border-color:var(--line-strong);background:rgba(255,255,255,.03);text-decoration:none}
.chip.is-active{
  color:var(--t1);
  background:rgba(38,214,181,.12);
  border-color:rgba(38,214,181,.55);
  box-shadow:inset 4px 0 0 0 var(--brand);
  padding-left:18px;
}

/* ============ 5. Hero ============ */
.hero{padding:40px 0 56px}
.hero-grid{gap:36px 0;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;margin-bottom:18px;border-radius:999px;
  font-size:12.5px;letter-spacing:.08em;
  color:var(--brand);
  background:rgba(38,214,181,.08);
  border:1px solid rgba(38,214,181,.35);
}
.hero h1{
  font-size:clamp(30px,3.8vw,44px);
  font-weight:800;line-height:1.16;letter-spacing:-.01em;
  margin-bottom:16px;
}
.hero h1 .h1-sep{color:var(--brand);font-weight:600;padding:0 4px}
.hero-lead{font-size:16px;line-height:1.8;color:var(--t2);margin-bottom:24px;max-width:520px}
.hero-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.hero-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:0 26px 66px -34px rgba(0,0,0,.95);
}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,13,0) 45%,rgba(5,8,13,.72) 100%);
  pointer-events:none;
}
.hero-chip{
  position:absolute;left:16px;bottom:16px;z-index:2;
  padding:6px 14px;border-radius:999px;
  font-size:12px;color:var(--t1);
  background:rgba(5,8,13,.72);
  border:1px solid rgba(38,214,181,.45);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}

/* ============ 6. 主题聚合区（标签云 + 卡阵） ============ */
.topic-hub{padding:var(--sec-md) 0}
.hub-grid{gap:32px 0}
.hub-tags-title{font-size:20px;font-weight:650;margin-bottom:8px}
.hub-tags-note{font-size:13.5px;color:var(--t3);margin:0}
.chip-cloud{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0 24px}
.chip-sm{
  display:inline-flex;align-items:center;
  padding:7px 14px;border-radius:999px;
  font-size:12.5px;color:var(--t2);
  border:1px solid var(--line);
  background:rgba(255,255,255,.02);
  transition:all var(--ease);
}
.chip-sm:hover{
  color:var(--t1);text-decoration:none;
  border-color:rgba(123,108,255,.55);
  background:rgba(123,108,255,.11);
}
.hub-cards{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.hub-card{
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;
  padding:18px;
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.hub-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:var(--brand);opacity:.85;
}
.hub-card:hover{
  transform:translateY(-3px);
  border-color:var(--line-strong);
  box-shadow:0 22px 46px -28px rgba(0,0,0,.95);
}
.hub-card-media{margin:-18px -18px 16px;border-radius:0;overflow:hidden}
.hub-card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0}
.hub-card h3{font-size:18px;font-weight:650;line-height:1.4;margin:0 0 8px;color:var(--t1)}
.hub-card p{font-size:14px;line-height:1.72;color:var(--t2);margin:0}
.hub-card .tag{align-self:flex-start;margin-bottom:10px}
.hub-card--tall{grid-row:span 2}
.hub-card--tall .hub-card-media img{aspect-ratio:4/3}
.hub-card--tall h3{font-size:20px}
.card-meta{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:auto;padding-top:14px;
  border-top:1px solid var(--line);
  font-size:12.5px;color:var(--t3);
}
.card-meta time{font-variant-numeric:tabular-nums}
.card-meta .arrow{color:var(--brand);font-weight:600}

/* ============ 7. 数据横条 ============ */
.stats-band{padding:8px 0 0}
.stats-grid{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat{padding:26px 20px;border-bottom:1px solid var(--line)}
.stat:last-child{border-bottom:0}
.stat-num{
  font-size:clamp(30px,3vw,42px);
  font-weight:800;line-height:1.1;
  color:var(--brand-2);
  font-variant-numeric:tabular-nums;
  margin:0 0 6px;
}
.stat-label{font-size:13.5px;color:var(--t3);margin:0}

/* ============ 8. 观赛流程图文区 ============ */
.flow-section{padding:var(--sec-md) 0}
.flow-row{gap:28px 0;align-items:center;margin-bottom:56px}
.flow-row:last-child{margin-bottom:0}
.flow-media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line)}
.flow-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:0}
.flow-copy h3{font-size:22px;line-height:1.35;margin-bottom:12px}
.flow-copy p{font-size:15.5px;line-height:1.85;color:var(--t2);margin-bottom:18px}
.mini-stats{display:flex;flex-wrap:wrap;gap:12px 32px}
.mini-stats li{display:flex;flex-direction:column;gap:2px}
.mini-stats strong{
  font-size:26px;line-height:1.2;font-weight:800;
  color:var(--brand);font-variant-numeric:tabular-nums;
}
.mini-stats span{font-size:12.5px;color:var(--t3)}

/* ============ 9. FAQ ============ */
.faq-section{padding:var(--sec-md) 0}
.faq-grid{gap:28px 0}
.faq-list{display:block}
.faq-item{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--ease),background-color var(--ease);
}
.faq-item:last-child{margin-bottom:0}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:18px 20px;
  font-size:16px;font-weight:600;color:var(--t1);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 auto;
  font-size:20px;line-height:1;color:var(--brand);
}
.faq-item[open]{border-color:rgba(38,214,181,.38);background:rgba(38,214,181,.05)}
.faq-item[open] summary::after{content:"–"}
.faq-answer{
  padding:0 20px 18px;
  font-size:14.5px;line-height:1.8;color:var(--t2);
}
.faq-item[open] .faq-answer{
  margin-left:20px;
  padding-left:17px;
  padding-right:20px;
  border-left:3px solid var(--brand);
}

/* ============ 10. CTA 条 ============ */
.cta-band{padding:0 0 var(--sec-md)}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;flex-wrap:wrap;
  padding:28px 32px;
  background:var(--ink-700);
  border:1px solid var(--line);
  border-top:2px solid var(--brand);
  border-radius:var(--r-lg);
}
.cta-text{margin:0;font-size:16.5px;font-weight:600;color:var(--t1);line-height:1.6}

/* ============ 11. 页脚 ============ */
.site-footer{
  background:var(--ink-900);
  border-top:1px solid var(--line);
  padding:56px 0 28px;
}
.foot-cols{gap:32px 0}
.foot-brand{font-size:17px;font-weight:800;color:var(--t1);margin:0 0 10px}
.foot-desc{font-size:13.5px;line-height:1.8;color:var(--t3);max-width:330px;margin:0}
.foot-col h3{font-size:14px;font-weight:600;color:var(--t1);margin:0 0 14px}
.foot-col ul li{margin-bottom:10px;font-size:13px;color:var(--t3);line-height:1.7}
.foot-col ul li a{font-size:13px;color:var(--t2)}
.foot-col ul li a:hover{color:var(--brand);text-decoration:none}
.foot-bottom{
  margin-top:36px;padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;flex-wrap:wrap;
}
.foot-bottom p{font-size:12.5px;color:var(--t3);margin:0}

/* ============ 12. 响应式 ============ */
@media (max-width:1023px){
  .hero{padding:28px 0 44px}
  .hub-cards{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hub-card--tall{grid-row:auto}
  .hub-card--tall .hub-card-media img{aspect-ratio:16/10}
  .chip-nav{
    -webkit-mask-image:linear-gradient(to right,#000 0,#000 calc(100% - 32px),transparent 100%);
    mask-image:linear-gradient(to right,#000 0,#000 calc(100% - 32px),transparent 100%);
  }
}
@media (max-width:780px){
  .menu-toggle{display:inline-flex}
  .chip-nav{flex-wrap:nowrap}
  .chip-nav.is-open{flex-wrap:wrap;overflow:visible;-webkit-mask-image:none;mask-image:none}
  .brand-text{font-size:15px}
  .hero-lead{font-size:15px}
  .sec-head{margin-bottom:32px}
  .flow-section,.faq-section,.topic-hub{padding:var(--sec-sm) 0}
}
@media (min-width:1024px){
  .hub-tags{position:sticky;top:124px;align-self:flex-start}
  .stat{border-bottom:0;border-left:1px solid var(--line);padding:32px 24px}
  .stat:first-child{border-left:0}
  .stats-band .grid-x{align-items:stretch}
}
@media (max-width:640px){
  .hub-cards{grid-template-columns:1fr}
  .hero h1{font-size:clamp(26px,7.4vw,32px)}
  .cta-inner{padding:22px 20px}
  .cta-text{font-size:15.5px}
  .foot-bottom{flex-direction:column;align-items:flex-start}
  .mini-stats{gap:14px 24px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}