/* roulang page: index */
:root{
  --bg:#08090E;
  --bg-2:#0E1118;
  --card:#141824;
  --layer:#1A1F2D;
  --primary:#2BE8C6;
  --secondary:#7C5CFF;
  --accent:#CBFF4D;
  --text:#E8ECF3;
  --muted:#96A0B2;
  --dim:#5C6675;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(43,232,198,.35);
  --ok:#34D399;
  --warn:#FFB020;
  --err:#FF5A6E;
  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --shadow-hover:0 18px 40px rgba(0,0,0,.55),0 0 0 1px rgba(43,232,198,.35),0 0 24px rgba(43,232,198,.18);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter","Space Grotesk","PingFang SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font-cn);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
::selection{background:rgba(43,232,198,.3)}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,9,14,.86);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:background .25s,box-shadow .25s;
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--primary),rgba(43,232,198,0) 62%);
}
.site-header.scrolled{background:rgba(8,9,14,.96);box-shadow:0 10px 30px rgba(0,0,0,.5)}
.nav{display:flex;align-items:center;gap:24px;height:68px}
.logo{font-size:18px;font-weight:800;letter-spacing:.01em;white-space:nowrap;display:flex;align-items:center;gap:9px}
.logo .dot{width:9px;height:9px;border-radius:3px;background:var(--primary);box-shadow:0 0 12px rgba(43,232,198,.8);flex:none}
.logo b{color:var(--primary);font-weight:800}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a{position:relative;font-size:15px;color:var(--muted);padding:6px 0;transition:color .18s}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .18s;
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);text-shadow:0 0 12px rgba(43,232,198,.5)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{margin-left:26px}
.nav-toggle{
  display:none;margin-left:auto;width:42px;height:42px;border:1px solid var(--line);
  border-radius:10px;background:var(--bg-2);cursor:pointer;position:relative;
}
.nav-toggle span{
  position:absolute;left:11px;right:11px;height:2px;background:var(--text);border-radius:2px;
  transition:transform .22s,opacity .22s;
}
.nav-toggle span:nth-child(1){top:14px}
.nav-toggle span:nth-child(2){top:20px}
.nav-toggle span:nth-child(3){top:26px}
.nav-toggle.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;visibility:hidden;
  transition:opacity .25s,visibility .25s;z-index:90;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;background:var(--bg-2);
  border-left:1px solid var(--line);z-index:100;transform:translateX(102%);
  transition:transform .28s cubic-bezier(.22,.7,.3,1);padding:24px 22px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-title{font-size:15px;color:var(--muted)}
.drawer-close{background:none;border:1px solid var(--line);border-radius:9px;width:36px;height:36px;cursor:pointer;color:var(--muted);font-size:16px}
.drawer nav{display:flex;flex-direction:column;gap:4px}
.drawer nav a{
  font-size:18px;color:var(--muted);padding:13px 14px;border-radius:10px;border-left:3px solid transparent;
  transition:color .18s,background .18s,border-color .18s;
}
.drawer nav a:hover{color:var(--text);background:rgba(255,255,255,.03)}
.drawer nav a.active{color:var(--primary);border-left-color:var(--primary);background:rgba(43,232,198,.06)}
.drawer .btn{width:100%;margin-top:22px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;white-space:nowrap;
  transition:transform .18s,background .18s,color .18s,border-color .18s,box-shadow .18s;
}
.btn-primary{background:var(--primary);color:#061014}
.btn-primary:hover{background:#4ff0d3;transform:translateY(-1px);box-shadow:0 0 24px rgba(43,232,198,.35)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.16);color:var(--text)}
.btn-ghost:hover{border-color:var(--line-strong);color:var(--primary);background:rgba(43,232,198,.06)}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.link-more{color:var(--primary);font-size:14px;font-weight:600;position:relative;display:inline-flex;align-items:center;gap:6px}
.link-more::after{
  content:"";position:absolute;left:0;bottom:-3px;height:1px;width:100%;background:currentColor;
  transform:scaleX(0);transform-origin:left;transition:transform .22s;
}
.link-more:hover::after{transform:scaleX(1)}

/* ---------- 首屏 ---------- */
.hero{position:relative;display:flex;align-items:center;min-height:min(88vh,720px);overflow:hidden;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;background:url("/assets/images/backpic/back-1.webp") center/cover no-repeat}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(8,9,14,.96) 0%,rgba(8,9,14,.82) 46%,rgba(8,9,14,.55) 100%),
             linear-gradient(180deg,rgba(8,9,14,.4) 0%,rgba(8,9,14,.2) 40%,var(--bg) 100%);
}
.hero-grid{
  position:absolute;inset:0;opacity:.07;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:24px 24px;
}
.hero-inner{position:relative;z-index:2;max-width:660px;padding:96px 0}
.hero-line{width:72px;height:1px;background:var(--primary);margin-bottom:26px;box-shadow:0 0 12px rgba(43,232,198,.6)}
.eyebrow{font-size:12px;letter-spacing:.18em;color:var(--primary);text-transform:uppercase;display:flex;align-items:center;gap:10px;margin-bottom:18px}
.eyebrow::before{content:"";width:16px;height:1px;background:var(--primary);display:inline-block}
.hero h1{font-size:clamp(32px,4.6vw,60px);font-weight:800;line-height:1.14;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-sub{margin-top:20px;font-size:clamp(16px,1.5vw,19px);line-height:1.7;color:var(--muted);max-width:600px}
.hero-actions{display:flex;gap:16px;margin-top:34px;flex-wrap:wrap}
.hero-trust{display:flex;align-items:center;gap:18px;margin-top:38px;font-size:13px;color:var(--dim);flex-wrap:wrap}
.hero-trust span{display:flex;align-items:center;gap:18px}
.hero-trust i{width:1px;height:12px;background:rgba(255,255,255,.18);display:inline-block}
.hero-glow{
  position:absolute;top:-120px;right:-80px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(43,232,198,.16),rgba(43,232,198,0) 68%);pointer-events:none;z-index:1;
}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;position:relative}
.section.alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,2.6vw,36px);font-weight:700;letter-spacing:-.01em}
.section-head .desc{margin-top:12px;font-size:16px;color:var(--muted);max-width:760px}
.grid-lines{
  position:absolute;inset:0;opacity:.05;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:24px 24px;
}
.badge{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--primary);background:rgba(43,232,198,.12);
}
.badge.purple{color:#B6A6FF;background:rgba(124,92,255,.16)}
.badge.green{color:#CBFF4D;background:rgba(203,255,77,.12)}

/* ---------- Bento 能力区 ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.bento-main{
  grid-column:span 5;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;transition:transform .22s,border-color .22s,box-shadow .22s;
}
.bento-main:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.bento-main img{width:100%;height:236px;object-fit:cover}
.bento-main .body{padding:28px}
.bento-main h3{font-size:20px;margin-bottom:12px}
.bento-main p{color:var(--muted);font-size:15px;line-height:1.8}
.bento-side{
  grid-column:span 7;display:grid;grid-template-columns:1fr 1fr;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
}
.bento-item{padding:28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:background .2s}
.bento-item:nth-child(2n){border-right:none}
.bento-item:nth-child(n+3){border-bottom:none}
.bento-item:hover{background:rgba(255,255,255,.03)}
.bento-item .idx{font-family:var(--font-num);font-size:13px;color:var(--primary);letter-spacing:.1em;margin-bottom:14px;display:block}
.bento-item h3{font-size:17px;font-weight:600;margin-bottom:10px}
.bento-item p{font-size:14px;color:var(--muted);line-height:1.75}
.bento-item .arrow{margin-top:16px;color:var(--dim);font-size:14px;transition:color .2s,transform .2s;display:inline-block}
.bento-item:hover .arrow{color:var(--primary);transform:translateX(4px)}

/* ---------- 数据 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;z-index:2}
.stat{padding:8px 26px;border-left:1px solid var(--line)}
.stat:first-child{border-left:none}
.stat .value{font-family:var(--font-num);font-size:clamp(38px,4vw,54px);font-weight:800;color:var(--accent);line-height:1.1;letter-spacing:-.02em}
.stat .value small{font-size:16px;font-weight:700;margin-left:4px;color:var(--accent);opacity:.8}
.stat .label{margin-top:10px;font-size:15px;color:var(--text);font-weight:600}
.stat .sub{margin-top:4px;font-size:13px;color:var(--dim)}
.stats-note{margin-top:36px;font-size:14px;color:var(--dim);position:relative;z-index:2}

/* ---------- 案例 ---------- */
.case{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:56px 0}
.case + .case{border-top:1px solid var(--line)}
.case.reverse .case-media{order:2}
.case-media{position:relative;border-radius:14px;overflow:hidden;border:1px solid var(--line);background:var(--card)}
.case-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.case-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,9,14,0) 45%,rgba(8,9,14,.85) 100%)}
.case-body h3{font-size:clamp(20px,2vw,26px);margin:16px 0 14px}
.case-body p{color:var(--muted);font-size:15.5px;line-height:1.8}
.case-results{display:flex;gap:40px;margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}
.case-results div .n{font-family:var(--font-num);font-size:26px;font-weight:700;color:var(--primary)}
.case-results div .t{font-size:13px;color:var(--dim);margin-top:2px}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.step{position:relative;padding-top:8px}
.step .node{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-num);
  font-size:14px;font-weight:700;color:var(--primary);background:rgba(43,232,198,.06);
  position:relative;z-index:2;
}
.step .bar{position:absolute;top:28px;left:40px;right:-24px;height:1px;background:var(--line)}
.step:last-child .bar{display:none}
.step h3{font-size:17px;margin:22px 0 10px}
.step p{font-size:14px;color:var(--muted);line-height:1.75}

/* ---------- 最新信息 ---------- */
.cms-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.cms-feature{
  grid-column:span 6;display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:transform .22s,border-color .22s,box-shadow .22s;
}
.cms-feature:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--shadow-hover)}
.cms-feature img{width:100%;aspect-ratio:16/9;object-fit:cover}
.cms-feature .body{padding:26px;display:flex;flex-direction:column;gap:12px;flex:1}
.cms-feature h3{font-size:20px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cms-feature .excerpt{font-size:14.5px;color:var(--muted);line-height:1.8;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.cms-meta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--dim);margin-top:auto;padding-top:8px}
.cms-side{grid-column:span 6;display:flex;flex-direction:column;gap:18px}
.cms-item{
  display:flex;gap:18px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--card);transition:background .2s,border-color .2s,transform .2s;
}
.cms-item:hover{background:var(--layer);border-color:var(--line-strong);transform:translateY(-2px)}
.cms-item img{width:112px;height:76px;object-fit:cover;border-radius:10px;flex:none}
.cms-item .txt{min-width:0}
.cms-item h3{font-size:17px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cms-item .excerpt{font-size:13.5px;color:var(--muted);margin-top:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cms-item .cms-meta{margin-top:8px;padding-top:0}
.cms-empty{
  border:1px dashed rgba(255,255,255,.16);border-radius:var(--r-card);min-height:180px;
  display:flex;align-items:center;justify-content:center;color:var(--dim);font-size:14px;background:rgba(255,255,255,.01);
}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;background:none;border:none;text-align:left;cursor:pointer;
  display:flex;align-items:flex-start;gap:16px;padding:22px 0;color:var(--text);
}
.faq-q .qmark{
  width:24px;height:24px;flex:none;border:1px solid var(--line-strong);border-radius:6px;
  display:flex;align-items:center;justify-content:center;font-size:12px;font-family:var(--font-num);
  color:var(--primary);margin-top:2px;
}
.faq-q .qtext{font-size:17px;font-weight:600;flex:1;line-height:1.5}
.faq-q .sign{position:relative;width:16px;height:16px;flex:none;margin-top:5px}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:var(--muted);transition:transform .24s,background .24s;
}
.faq-q .sign::before{left:0;right:0;top:7px;height:1.5px}
.faq-q .sign::after{top:0;bottom:0;left:7px;width:1.5px}
.faq-item.open .sign::after{transform:scaleY(0)}
.faq-item.open .sign::before,.faq-item.open .sign::after{background:var(--primary)}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .24s ease,opacity .24s ease}
.faq-item.open .faq-a{max-height:320px;opacity:1}
.faq-a p{padding:0 0 24px 40px;max-width:720px;font-size:15px;line-height:1.8;color:var(--muted)}

/* ---------- CTA / 表单 ---------- */
.cta-wrap{
  display:grid;grid-template-columns:7fr 5fr;gap:48px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:20px;padding:56px;position:relative;overflow:hidden;
}
.cta-wrap .grid-lines{opacity:.045}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;position:relative;z-index:2}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:span 2}
.field label{font-size:13.5px;color:var(--muted)}
.field input,.field select,.field textarea{
  background:var(--bg-2);border:1px solid rgba(255,255,255,.1);border-radius:var(--r-sm);
  padding:0 14px;height:48px;color:var(--text);transition:border-color .18s,box-shadow .18s;
}
.field textarea{height:auto;padding:12px 14px;resize:vertical;min-height:104px;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--dim)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(43,232,198,.14);
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.agree{grid-column:span 2;display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--muted)}
.agree input{width:16px;height:16px;accent-color:var(--primary);margin-top:4px;flex:none}
.form-note{grid-column:span 2;font-size:13px;color:var(--dim)}
.form-status{grid-column:span 2;display:none;font-size:14px;padding:12px 14px;border-radius:10px;border:1px solid var(--line-strong);background:rgba(43,232,198,.07);color:var(--primary)}
.form-status.show{display:block}
.cta-aside{
  position:relative;z-index:2;background:var(--card);border:1px solid rgba(43,232,198,.2);
  border-radius:var(--r-card);padding:30px;box-shadow:var(--shadow);
}
.cta-aside h3{font-size:19px;margin-bottom:8px}
.cta-aside .lead{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:22px}
.info-row{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid var(--line)}
.info-row .ic{
  width:34px;height:34px;border-radius:9px;flex:none;display:flex;align-items:center;justify-content:center;
  background:rgba(43,232,198,.1);color:var(--primary);font-family:var(--font-num);font-size:13px;font-weight:700;
}
.info-row .k{font-size:13px;color:var(--dim)}
.info-row .v{font-size:14.5px;color:var(--text);margin-top:2px;word-break:break-all}
.cta-tip{grid-column:1/-1;font-size:13px;color:var(--dim);margin-top:6px}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg);position:relative;margin-top:8px}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,var(--primary),rgba(43,232,198,.12) 55%,rgba(43,232,198,0));
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 44px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--muted);line-height:1.8;max-width:320px}
.footer-col h4{font-size:15px;margin-bottom:18px;font-weight:700}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:var(--muted);transition:color .18s,transform .18s;display:inline-block}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:13px;color:var(--dim);
}

/* ---------- 动效 ---------- */
.fade-up{opacity:0;transform:translateY(16px);transition:opacity .36s cubic-bezier(.22,.7,.3,1),transform .36s cubic-bezier(.22,.7,.3,1)}
.fade-up.in{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:1440px){
  .container{max-width:1240px}
}
@media (max-width:1024px){
  .nav-links{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:block}
  .section{padding:72px 0}
  .hero{min-height:68vh}
  .hero-inner{padding:72px 0}
  .bento-main{grid-column:span 12}
  .bento-side{grid-column:span 12}
  .cms-feature{grid-column:span 12}
  .cms-side{grid-column:span 12}
  .cta-wrap{grid-template-columns:1fr;padding:40px;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .case{gap:36px;padding:44px 0}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .nav{height:60px}
  .logo{font-size:16px}
  .section{padding:56px 0}
  .hero-inner{padding:56px 0}
  .hero h1{font-size:clamp(27px,7.4vw,36px)}
  .hero-sub{font-size:16px}
  .hero-actions .btn{flex:1}
  .bento-side{grid-template-columns:1fr}
  .bento-item{border-right:none}
  .bento-item:nth-child(3){border-bottom:1px solid var(--line)}
  .stats{grid-template-columns:1fr 1fr;gap:28px 0}
  .stat{border-left:none;padding:0 0 0 18px;border-left:1px solid var(--line)}
  .stat:nth-child(odd){border-left:none;padding-left:0}
  .case{grid-template-columns:1fr}
  .case.reverse .case-media{order:0}
  .steps{grid-template-columns:1fr;gap:32px}
  .step{padding-left:56px}
  .step .node{position:absolute;left:0;top:0}
  .step .bar{left:20px;right:auto;top:40px;bottom:-32px;width:1px;height:auto}
  .step:last-child .bar{display:none}
  .step h3{margin-top:0}
  .cms-item{flex-direction:column;align-items:flex-start}
  .cms-item img{width:100%;height:150px}
  .form-grid{grid-template-columns:1fr}
  .field.full,.agree,.form-note,.form-status{grid-column:span 1}
  .cta-wrap{padding:28px 22px;border-radius:16px}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding:48px 0 32px}
  .faq-a p{padding-left:0}
}
@media (max-width:520px){
  .hero-actions{flex-direction:column;gap:12px}
  .hero-actions .btn{width:100%}
  .hero-trust{font-size:12px;gap:10px}
  .stats{grid-template-columns:1fr}
  .stat{padding-left:0;border-left:none;border-top:1px solid var(--line);padding-top:16px}
  .stat:first-child{border-top:none;padding-top:0}
  .case-results{gap:24px}
  .btn{padding:11px 18px}
  .card,.cms-feature,.bento-main,.bento-side{border-radius:14px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .fade-up{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --bg:#08090E;--bg-2:#0E1118;--card:#141824;--float:#1A1F2D;
  --primary:#2BE8C6;--secondary:#7C5CFF;--accent:#CBFF4D;
  --text:#E8ECF3;--text-2:#96A0B2;--text-3:#5C6675;
  --line:rgba(255,255,255,.08);--line-2:rgba(255,255,255,.16);--line-strong:rgba(43,232,198,.35);
  --ok:#34D399;--warn:#FFB020;--err:#FF5A6E;
  --r-card:16px;--r-sm:12px;--r-btn:10px;--r-pill:999px;
  --sh:0 10px 30px rgba(0,0,0,.45);
  --sh-hover:0 18px 40px rgba(0,0,0,.55),0 0 0 1px rgba(43,232,198,.35),0 0 24px rgba(43,232,198,.18);
  --container:1240px;--nav-h:68px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
h1,h2,h3,h4,h5{margin:0;line-height:1.25}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(43,232,198,.28);color:#fff}
.num{font-family:"Inter","Space Grotesk",sans-serif;font-variant-numeric:tabular-nums}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1320px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);font-size:15px;font-weight:700;
  border:1px solid transparent;transition:all .2s ease;white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#061014;box-shadow:0 6px 18px rgba(43,232,198,.18)}
.btn-primary:hover{background:#48f2d3;box-shadow:0 10px 26px rgba(43,232,198,.32),0 0 0 1px rgba(43,232,198,.5);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-2)}
.btn-ghost:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(43,232,198,.06)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600;position:relative}
.link-arrow::after{content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;background:var(--primary);transition:width .22s ease}
.link-arrow:hover::after{width:100%}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;height:var(--nav-h);
  background:rgba(10,9,14,.86);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);transition:background .25s ease,box-shadow .25s ease;
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--primary),rgba(43,232,198,0) 62%);
}
.site-header.scrolled{background:rgba(8,9,14,.96);box-shadow:0 12px 30px rgba(0,0,0,.5)}
.nav{display:flex;align-items:center;gap:28px;height:var(--nav-h)}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--text)}
.logo b{color:var(--primary);font-weight:800}
.logo .dot{width:12px;height:12px;border-radius:4px;background:linear-gradient(135deg,var(--primary),var(--secondary));box-shadow:0 0 14px rgba(43,232,198,.55);flex:none}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a{position:relative;font-size:15px;color:var(--text-2);padding:6px 0}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);text-shadow:0 0 12px rgba(43,232,198,.5)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{margin-left:6px}
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;margin-left:auto;border:1px solid var(--line-2);border-radius:10px}
.nav-toggle span{display:block;height:2px;width:20px;margin:0 auto;background:var(--text);transition:transform .25s ease,opacity .2s ease}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-mask{position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;visibility:hidden;transition:opacity .25s ease;z-index:80}
.nav-mask.open{opacity:1;visibility:visible}

/* ---------- 面包屑 ---------- */
.crumb-bar{border-bottom:1px solid var(--line);background:var(--bg-2)}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-2);padding:14px 0}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:var(--primary);opacity:.8}
.crumb .now{color:var(--text-3);max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-hero{
  position:relative;padding:56px 0 40px;border-bottom:1px solid var(--line);overflow:hidden;
  background:
    linear-gradient(180deg,rgba(8,9,14,.92),rgba(8,9,14,.98)),
    url(/assets/images/backpic/back-2.webp) center/cover no-repeat;
}
.article-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.06;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:24px 24px;
}
.article-hero .container{position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.18em;color:var(--primary);text-transform:uppercase;margin-bottom:16px}
.eyebrow::before{content:"";width:16px;height:2px;background:var(--primary);border-radius:2px}
.article-hero h1{font-size:clamp(28px,4vw,46px);font-weight:800;line-height:1.18;letter-spacing:-.02em;max-width:900px}
.meta-row{display:flex;align-items:center;flex-wrap:wrap;gap:14px;margin-top:24px;font-size:13px;color:var(--text-2)}
.meta-row .divider{width:1px;height:14px;background:var(--line-2)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);font-size:12px;font-weight:600;background:rgba(43,232,198,.12);color:var(--primary);border:1px solid rgba(43,232,198,.28)}
.badge-purple{background:rgba(124,92,255,.14);color:#B9A6FF;border-color:rgba(124,92,255,.32)}

/* ---------- 布局 ---------- */
.article-wrap{padding:56px 0 80px}
.article-shell{display:grid;grid-template-columns:minmax(0,1fr);gap:56px;align-items:start}
.article-main{max-width:860px;min-width:0}
.prose{font-size:17.5px;line-height:1.9;color:#DCE3EE}
.prose>*:first-child{margin-top:0}
.prose p{margin:0 0 1.2em}
.prose h2{position:relative;font-size:clamp(20px,2.2vw,26px);font-weight:700;margin:44px 0 16px;padding-left:16px;color:var(--text)}
.prose h2::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:3px;border-radius:2px;background:var(--primary);box-shadow:0 0 12px rgba(43,232,198,.5)}
.prose h3{font-size:20px;font-weight:700;margin:32px 0 12px;color:var(--text)}
.prose h4{font-size:17px;font-weight:700;margin:24px 0 10px;color:var(--text)}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.4em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin:.4em 0;line-height:1.8}
.prose li::marker{color:var(--primary)}
.prose blockquote{margin:24px 0;padding:16px 20px;border-left:3px solid var(--primary);background:rgba(255,255,255,.03);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--text-2)}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:var(--r-sm);margin:24px 0;border:1px solid var(--line)}
.prose figure{margin:24px 0}
.prose figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}
.prose a{color:var(--primary);border-bottom:1px solid rgba(43,232,198,.35)}
.prose a:hover{color:#48f2d3}
.prose code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em;background:var(--bg-2);border:1px solid var(--line);border-radius:6px;padding:2px 6px;color:var(--accent)}
.prose pre{margin:24px 0;padding:18px 20px;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-sm);overflow:auto;font-size:14px;line-height:1.7}
.prose pre code{background:none;border:0;padding:0;color:var(--text);font-size:14px}
.prose table{width:100%;margin:24px 0;font-size:15px}
.prose th,.prose td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.prose th{color:var(--text-2);font-weight:600;font-size:14px;letter-spacing:.02em}
.prose hr{margin:36px 0;border:0;border-top:1px solid var(--line)}
.prose strong{color:#fff;font-weight:700}

/* 目录 */
.toc{display:none;position:sticky;top:calc(var(--nav-h) + 24px);border-left:1px solid var(--line);padding-left:20px}
.toc h4{font-size:12px;letter-spacing:.18em;color:var(--text-3);margin-bottom:14px;font-weight:600}
.toc ol{counter-reset:toc}
.toc li{margin-bottom:10px;font-size:14px;color:var(--text-2);line-height:1.5}
.toc li a:hover{color:var(--primary)}
.toc-note{margin-top:20px;font-size:12px;color:var(--text-3);line-height:1.7}

/* 空态 */
.empty-state{
  margin:8px 0 24px;padding:48px 24px;text-align:center;border:1px dashed var(--line-2);
  border-radius:var(--r-card);background:rgba(255,255,255,.02);
}
.empty-state h3{font-size:18px;margin-bottom:10px}
.empty-state p{font-size:14px;color:var(--text-2);margin-bottom:18px}

/* 标签 */
.tag-block{margin-top:48px;padding-top:28px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.tag-block .tag-title{font-size:13px;color:var(--text-3);margin-right:4px}
.tag{padding:5px 13px;border-radius:var(--r-pill);font-size:13px;color:var(--text-2);border:1px solid var(--line-2);background:var(--bg-2)}
.tag:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(43,232,198,.06)}

/* 上下篇 */
.pager{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:44px}
.pager a{
  display:block;padding:20px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  transition:all .22s ease;min-width:0;
}
.pager a:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--sh-hover)}
.pager .pager-label{font-size:12px;letter-spacing:.14em;color:var(--text-3);margin-bottom:8px}
.pager .pager-title{font-size:16px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pager .pager-sub{font-size:13px;color:var(--text-2);margin-top:6px}

/* 相关推荐 */
.related{margin-top:72px;padding-top:44px;border-top:1px solid var(--line)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.sec-head h2{font-size:clamp(20px,2.2vw,26px);font-weight:700}
.sec-head p{font-size:14px;color:var(--text-2);margin-top:8px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rcard{
  display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;transition:all .22s ease;position:relative;
}
.rcard:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--sh-hover)}
.rcard .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.rcard .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.rcard:hover .thumb img{transform:scale(1.04)}
.rcard .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,9,14,0) 40%,rgba(8,9,14,.85))}
.rcard .body{padding:18px 20px 22px}
.rcard h3{font-size:17px;font-weight:600;line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rcard p{font-size:14px;color:var(--text-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rcard .foot{margin-top:14px;font-size:12px;color:var(--text-3);display:flex;align-items:center;gap:10px}

.back-bar{margin-top:56px;display:flex;justify-content:center}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;background:var(--bg-2);border-top:1px solid var(--line);padding:64px 0 28px;margin-top:20px}
.site-footer::before{content:"";position:absolute;top:-1px;left:0;right:0;height:1px;background:linear-gradient(90deg,rgba(43,232,198,0),var(--primary),rgba(43,232,198,0))}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-2);line-height:1.8;max-width:360px}
.footer-col h4{font-size:14px;font-weight:700;color:var(--text);margin-bottom:16px;letter-spacing:.02em}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--text-2);display:inline-block}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-bottom{margin-top:48px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-3)}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.in{opacity:1;transform:none;transition:opacity .36s cubic-bezier(.22,.7,.3,1),transform .36s cubic-bezier(.22,.7,.3,1)}

/* ---------- 响应式 ---------- */
@media (min-width:1280px){
  .article-shell{grid-template-columns:minmax(0,1fr) 260px}
  .toc{display:block}
  .article-main{max-width:800px}
}
@media (max-width:1024px){
  :root{--nav-h:60px}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .nav-links{
    position:fixed;top:0;right:0;height:100vh;width:84vw;max-width:360px;
    background:var(--bg-2);border-left:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:2px;margin:0;
    padding:88px 20px 24px;transform:translateX(100%);transition:transform .3s ease;z-index:85;overflow-y:auto;
  }
  .nav-links.open{transform:translateX(0)}
  .nav-links a{font-size:18px;padding:14px 12px;border-radius:10px;color:var(--text-2)}
  .nav-links a::after{display:none}
  .nav-links a.active{color:var(--primary);background:rgba(43,232,198,.07);border-left:3px solid var(--primary);border-radius:0 10px 10px 0}
  .article-hero{padding:44px 0 32px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .article-hero{padding:36px 0 28px}
  .article-wrap{padding:40px 0 64px}
  .article-shell{gap:32px}
  .prose{font-size:17px;line-height:1.85}
  .pager{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .crumb .now{max-width:60vw}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:520px){
  .article-hero h1{font-size:26px}
  .meta-row{gap:10px;font-size:12px}
  .btn{width:100%}
  .back-bar .btn{width:auto}
  .rcard h3{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --bg:#08090E; --bg2:#0E1118; --card:#141824; --panel:#1A1F2D;
  --pri:#2BE8C6; --sec:#7C5CFF; --acc:#CBFF4D;
  --text:#E8ECF3; --muted:#96A0B2; --dim:#5C6675;
  --line:rgba(255,255,255,.08); --line-pri:rgba(43,232,198,.35);
  --ok:#34D399; --warn:#FFB020; --err:#FF5A6E;
  --r-card:16px; --r-sm:12px; --r-btn:10px;
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --shadow-h:0 18px 40px rgba(0,0,0,.55),0 0 0 1px rgba(43,232,198,.35),0 0 24px rgba(43,232,198,.18);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter","Space Grotesk","PingFang SC",sans-serif;
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);font-family:var(--font);
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s ease}
h1,h2,h3,h4,p,ul,ol{margin:0;padding:0}
ul,ol{list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
:focus-visible{outline:2px solid var(--pri);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media(min-width:1440px){:root{--container:1320px}}

/* ============ 通用组件 ============ */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;
  color:var(--pri);text-transform:uppercase;font-weight:700;
}
.eyebrow::before{content:"";width:16px;height:2px;background:var(--pri);border-radius:2px}
.section{padding:96px 0}
.section-head{max-width:760px;margin-bottom:48px}
.section-head h2{font-size:clamp(24px,2.6vw,36px);font-weight:700;line-height:1.25;margin-top:14px;letter-spacing:-.01em}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px}
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.link-more{
  color:var(--pri);font-size:15px;font-weight:600;position:relative;padding-bottom:3px;
}
.link-more::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;background:var(--pri);
  transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.link-more:hover::after{transform:scaleX(1)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--r-btn);font-size:15px;font-weight:700;
  transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--pri);color:#061014;box-shadow:0 6px 18px rgba(43,232,198,.18)}
.btn-primary:hover{background:#4ff0d4;transform:translateY(-1px);box-shadow:0 10px 26px rgba(43,232,198,.32)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.16);color:var(--text)}
.btn-ghost:hover{border-color:var(--line-pri);color:var(--pri);background:rgba(43,232,198,.06);transform:translateY(-1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;transform:none}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:600;color:var(--pri);background:rgba(43,232,198,.12);
  border:1px solid rgba(43,232,198,.22);
}
.badge.purple{color:#B7A6FF;background:rgba(124,92,255,.14);border-color:rgba(124,92,255,.28)}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(10,9,14,.86);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);transition:background .25s ease,box-shadow .25s ease;
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(43,232,198,.55),transparent);
}
.site-header.scrolled{background:rgba(8,9,14,.96);box-shadow:0 14px 34px rgba(0,0,0,.5)}
.nav{display:flex;align-items:center;gap:28px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.01em}
.logo b{color:var(--pri)}
.logo .dot{
  width:12px;height:12px;border-radius:4px;background:linear-gradient(135deg,var(--pri),var(--sec));
  box-shadow:0 0 14px rgba(43,232,198,.6);flex:none;
}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:12px}
.nav-links a{
  position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--muted);
  border-radius:8px;transition:color .18s ease,text-shadow .18s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--pri);
  border-radius:2px;transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--pri);text-shadow:0 0 12px rgba(43,232,198,.5)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{margin-left:auto;padding:10px 20px}
.nav-toggle{
  display:none;width:42px;height:42px;margin-left:auto;border-radius:10px;
  border:1px solid var(--line);flex-direction:column;justify-content:center;align-items:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s ease,opacity .2s ease}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;z-index:110;
}
.nav-mask.show{opacity:1;visibility:visible}

/* ============ 分类页 Banner ============ */
.cat-banner{
  position:relative;min-height:320px;display:flex;align-items:flex-end;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;overflow:hidden;
}
.cat-banner::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(8,9,14,.96) 0%,rgba(8,9,14,.82) 46%,rgba(8,9,14,.5) 100%);
}
.cat-banner::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:24px 24px;opacity:.5;
}
.cat-banner .inner{position:relative;z-index:2;padding:56px 0 48px;max-width:720px}
.cat-banner .glow{
  position:absolute;right:-80px;top:-120px;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(43,232,198,.18),transparent 68%);z-index:1;
}
.cat-banner h1{
  font-size:clamp(32px,4.2vw,54px);font-weight:800;line-height:1.14;letter-spacing:-.02em;margin-top:16px;
}
.cat-banner h1 em{font-style:normal;color:var(--pri)}
.cat-banner .sub{margin-top:16px;font-size:16px;color:var(--muted);max-width:620px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--dim);position:relative;z-index:2}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--pri)}
.crumb .sep{color:var(--pri)}
.crumb .cur{color:var(--dim)}

/* ============ Bento 覆盖范围 ============ */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.bento-main{
  grid-column:span 5;background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;transition:box-shadow .25s ease,transform .25s ease;
}
.bento-main:hover{transform:translateY(-2px);box-shadow:var(--shadow-h)}
.bento-main .thumb{position:relative;aspect-ratio:16/10;overflow:hidden}
.bento-main .thumb img{width:100%;height:100%;object-fit:cover}
.bento-main .thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,var(--card) 4%,transparent 62%)}
.bento-main .body{padding:26px 26px 30px}
.bento-main h3{font-size:20px;font-weight:700;margin-bottom:12px}
.bento-main p{color:var(--muted);font-size:15px}
.bento-grid{
  grid-column:span 7;display:grid;grid-template-columns:1fr 1fr;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
}
.bento-cell{
  padding:28px 26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  display:flex;flex-direction:column;gap:10px;transition:background .22s ease;
}
.bento-cell:nth-child(2n){border-right:none}
.bento-cell:nth-child(n+3){border-bottom:none}
.bento-cell:hover{background:rgba(43,232,198,.04)}
.bento-cell .idx{font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--acc);letter-spacing:.1em}
.bento-cell h3{font-size:17px;font-weight:600}
.bento-cell p{font-size:14px;color:var(--muted);line-height:1.7}
.bento-cell .arrow{margin-top:auto;color:var(--pri);font-size:14px;font-weight:600}
.bento-cell:hover .arrow{transform:translateX(3px);transition:transform .22s ease}

/* ============ 适用场景 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene-card{
  padding:28px 24px;background:var(--bg2);border:1px solid var(--line);border-radius:var(--r-card);
  position:relative;overflow:hidden;transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.scene-card::before{
  content:"";position:absolute;top:0;left:0;width:12px;height:12px;
  border-top:2px solid var(--pri);border-left:2px solid var(--pri);opacity:0;transition:opacity .22s ease;
}
.scene-card:hover{transform:translateY(-2px);border-color:var(--line-pri);box-shadow:var(--shadow-h)}
.scene-card:hover::before{opacity:1}
.scene-card .icon{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:rgba(43,232,198,.1);color:var(--pri);font-size:18px;font-weight:700;
  font-family:var(--font-num);margin-bottom:16px;
}
.scene-card h3{font-size:17px;font-weight:600;margin-bottom:10px}
.scene-card p{font-size:14px;color:var(--muted)}

/* ============ 更新节奏 ============ */
.flow-wrap{
  background:var(--bg2);border:1px solid var(--line);border-radius:var(--r-card);padding:48px 40px;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:24px 24px;
}
.flow{display:grid;grid-template-columns:repeat(4,1fr)}
.flow-step{position:relative;padding-right:32px}
.flow-step .node{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line-pri);color:var(--pri);
  display:grid;place-items:center;font-family:var(--font-num);font-weight:700;font-size:14px;
  background:var(--bg2);position:relative;z-index:2;
}
.flow-step::after{
  content:"";position:absolute;top:20px;left:48px;right:28px;height:1px;background:var(--line);
}
.flow-step:last-child::after{display:none}
.flow-step h3{margin-top:18px;font-size:17px;font-weight:600}
.flow-step p{margin-top:8px;font-size:14px;color:var(--muted);max-width:240px}

/* ============ 频道栏目卡 ============ */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.channel-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .22s ease,box-shadow .25s ease,border-color .22s ease;
}
.channel-card:hover{transform:translateY(-3px);border-color:var(--line-pri);box-shadow:var(--shadow-h)}
.channel-card .cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--panel)}
.channel-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.channel-card:hover .cover img{transform:scale(1.04)}
.channel-card .cover::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(20,24,36,.92),transparent 60%)}
.channel-card .cover .tag{position:absolute;left:16px;top:16px;z-index:2}
.channel-card .body{padding:22px 22px 26px;display:flex;flex-direction:column;gap:12px;flex:1}
.channel-card h3{font-size:18px;font-weight:700;line-height:1.45}
.channel-card p{font-size:14px;color:var(--muted)}
.channel-card .meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--dim)}
.channel-card .meta .link-more{font-size:14px}

/* ============ 数据条 ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat{padding:36px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat .v{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:clamp(34px,4vw,54px);
  font-weight:800;color:var(--acc);line-height:1;letter-spacing:-.02em;
}
.stat .v sup{font-size:15px;font-weight:600;margin-left:4px;color:var(--muted);vertical-align:super}
.stat .k{margin-top:14px;font-size:15px;font-weight:600}
.stat .d{margin-top:6px;font-size:13px;color:var(--dim)}

/* ============ FAQ ============ */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;display:flex;align-items:center;gap:16px;padding:24px 0;cursor:pointer;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item .q{
  width:26px;height:26px;flex:none;border:1px solid var(--line-pri);border-radius:7px;
  display:grid;place-items:center;font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--pri);
}
.faq-item .faq-q{font-size:17px;font-weight:600;flex:1}
.faq-icon{position:relative;width:16px;height:16px;flex:none}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--muted);border-radius:2px;transition:transform .24s ease,opacity .24s ease;
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-item[open] .faq-icon::after{transform:scaleY(0);opacity:0}
.faq-item[open] .faq-icon::before{background:var(--pri)}
.faq-item[open] summary .faq-q{color:var(--pri)}
.faq-a{padding:0 0 26px 42px;max-width:720px;font-size:15px;line-height:1.8;color:var(--muted)}
.faq-a p{animation:faqIn .24s ease both}
@keyframes faqIn{from{opacity:0}to{opacity:1}}

/* ============ 页尾 CTA 条 ============ */
.cta-bar{
  background:linear-gradient(120deg,rgba(43,232,198,.1),rgba(124,92,255,.1));
  border:1px solid var(--line-pri);border-radius:var(--r-card);
  padding:40px 44px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-bar h2{font-size:clamp(20px,2.1vw,28px);font-weight:700;line-height:1.35}
.cta-bar p{margin-top:10px;color:var(--muted);font-size:15px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:var(--bg2);position:relative;padding:72px 0 0}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(43,232,198,.6),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:56px}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--muted);max-width:340px}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:18px}
.footer-col ul li{margin-bottom:12px}
.footer-col ul li a{font-size:14px;color:var(--muted);display:inline-block;transition:color .18s ease,transform .18s ease}
.footer-col ul li a:hover{color:var(--pri);transform:translateX(2px)}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 28px;display:flex;align-items:center;justify-content:space-between;
  gap:16px;font-size:13px;color:var(--dim);flex-wrap:wrap;
}

/* ============ 动效 ============ */
.fade-up{opacity:0;transform:translateY(16px);transition:opacity .36s cubic-bezier(.22,.7,.3,1),transform .36s cubic-bezier(.22,.7,.3,1)}
.fade-up.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .fade-up{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* ============ 响应式 ============ */
@media(max-width:1280px){
  .section{padding:80px 0}
}
@media(max-width:1024px){
  .section{padding:72px 0}
  .nav-links{
    position:fixed;top:0;right:0;height:100vh;width:84vw;max-width:360px;background:var(--bg2);
    flex-direction:column;align-items:stretch;gap:4px;padding:92px 24px 32px;margin-left:0;
    transform:translateX(100%);transition:transform .32s cubic-bezier(.22,.7,.3,1);z-index:120;
    border-left:1px solid var(--line);overflow-y:auto;
  }
  .nav-links.open{transform:none}
  .nav-links a{font-size:18px;padding:14px 12px}
  .nav-links a::after{display:none}
  .nav-links a.active{box-shadow:inset 3px 0 0 var(--pri)}
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .bento-main,.bento-grid{grid-column:span 12}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr);gap:36px 0}
  .flow-step:nth-child(2)::after{display:none}
  .channel-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .cat-banner{min-height:280px}
  .cat-banner .inner{padding:44px 0 36px}
  .scene-grid{grid-template-columns:1fr}
  .channel-grid{grid-template-columns:1fr}
  .bento-grid{grid-template-columns:1fr}
  .bento-cell{border-right:none !important;border-bottom:1px solid var(--line) !important}
  .bento-cell:last-child{border-bottom:none !important}
  .flow{grid-template-columns:1fr;gap:0}
  .flow-step{padding:0 0 32px 0;display:flex;gap:16px;align-items:flex-start}
  .flow-step::after{left:20px;top:44px;bottom:4px;right:auto;width:1px;height:auto}
  .flow-step:last-child{padding-bottom:0}
  .flow-step .node{flex:none}
  .flow-step h3{margin-top:6px}
  .flow-step p{max-width:none}
  .stats{grid-template-columns:1fr 1fr}
  .stat{border-bottom:1px solid var(--line)}
  .stat:nth-child(2n){border-right:none}
  .stat:nth-child(n+3){border-bottom:none}
  .cta-bar{padding:32px 24px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .faq-a{padding-left:0}
}
@media(max-width:520px){
  .btn{width:100%}
  .cta-actions{width:100%}
  .nav-links{width:88vw}
  .stats{grid-template-columns:1fr}
  .stat{border-right:none !important;border-bottom:1px solid var(--line) !important}
  .stat:last-child{border-bottom:none !important}
  .cat-banner h1{font-size:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: category2 */
:root{
  --bg:#08090E;
  --bg-soft:#0E1118;
  --card:#141824;
  --elev:#1A1F2D;
  --primary:#2BE8C6;
  --secondary:#7C5CFF;
  --accent:#CBFF4D;
  --text:#E8ECF3;
  --muted:#96A0B2;
  --dim:#5C6675;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(43,232,198,.35);
  --ok:#34D399;
  --warn:#FFB020;
  --err:#FF5A6E;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --shadow-hover:0 18px 40px rgba(0,0,0,.55),0 0 0 1px rgba(43,232,198,.35),0 0 24px rgba(43,232,198,.18);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter","Space Grotesk","PingFang SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html,body{margin:0;padding:0;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-md);}
a{color:inherit;text-decoration:none;transition:color .18s ease,opacity .18s ease;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--text);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}
@media (min-width:1440px){.container{max-width:1320px;}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  height:68px;display:flex;align-items:center;
  background:rgba(10,9,14,.86);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  transition:background .24s ease,box-shadow .24s ease;
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(43,232,198,.55),transparent);
}
.site-header.scrolled{background:rgba(8,9,14,.96);box-shadow:0 12px 30px rgba(0,0,0,.5);}
.nav{display:flex;align-items:center;gap:26px;height:100%;}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--text);white-space:nowrap;}
.logo .dot{width:10px;height:10px;border-radius:3px;background:var(--primary);box-shadow:0 0 12px rgba(43,232,198,.8);flex:0 0 auto;}
.logo b{color:var(--primary);font-weight:800;}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav-links a{position:relative;font-size:15px;color:var(--muted);padding:6px 0;transition:color .18s ease,text-shadow .18s ease;}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--primary);transition:width .24s cubic-bezier(.22,.7,.3,1);
}
.nav-links a:hover{color:var(--text);}
.nav-links a:hover::after{width:100%;}
.nav-links a.active{color:var(--primary);text-shadow:0 0 12px rgba(43,232,198,.5);}
.nav-links a.active::after{width:100%;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:700;line-height:1;
  padding:12px 22px;border-radius:var(--r-sm);
  transition:transform .16s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#061014;border:1px solid var(--primary);}
.btn-primary:hover{background:#4df0d3;border-color:#4df0d3;box-shadow:0 0 24px rgba(43,232,198,.45);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;color:var(--text);border:1px solid rgba(255,255,255,.16);}
.btn-ghost:hover{color:var(--primary);border-color:var(--line-strong);background:rgba(43,232,198,.06);transform:translateY(-1px);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.nav-cta{padding:11px 20px;font-size:14px;}
.text-link{color:var(--primary);font-size:14px;font-weight:600;position:relative;display:inline-flex;align-items:center;gap:6px;}
.text-link::after{content:"";position:absolute;left:0;right:100%;bottom:-3px;height:1px;background:var(--primary);transition:right .24s cubic-bezier(.22,.7,.3,1);}
.text-link:hover::after{right:0;}
.nav-toggle{
  display:none;width:42px;height:42px;margin-left:auto;border-radius:var(--r-sm);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  border:1px solid rgba(255,255,255,.12);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .24s ease,opacity .2s ease;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;z-index:200;
  background:var(--bg-soft);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .28s cubic-bezier(.22,.7,.3,1);
  padding:88px 26px 40px;overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer a{display:block;font-size:18px;padding:15px 0 15px 14px;color:var(--muted);border-bottom:1px solid var(--line);position:relative;}
.drawer a:hover{color:var(--text);}
.drawer a.active{color:var(--primary);}
.drawer a.active::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--primary);border-radius:2px;}
.drawer .btn{margin-top:26px;width:100%;}
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;visibility:hidden;transition:opacity .26s ease;z-index:190;}
.overlay.show{opacity:1;visibility:visible;}
@media (max-width:980px){
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:flex;}
}
@media (max-width:480px){
  .site-header{height:60px;}
  .logo{font-size:15px;}
}

/* ---------- Banner ---------- */
.page-banner{
  position:relative;height:320px;display:flex;align-items:flex-end;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  overflow:hidden;
}
.page-banner::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,9,14,.72),rgba(8,9,14,.92) 60%,var(--bg) 100%);
}
.page-banner::after{
  content:"";position:absolute;inset:0;opacity:.06;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:24px 24px;
}
.banner-inner{position:relative;z-index:2;padding-bottom:44px;width:100%;}
.crumbs{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--dim);margin-bottom:18px;flex-wrap:wrap;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--primary);}
.crumbs .sep{color:var(--primary);}
.crumbs .now{color:var(--dim);}
.page-banner h1{font-size:clamp(30px,4.2vw,52px);font-weight:800;line-height:1.14;letter-spacing:-.02em;max-width:820px;}
.page-banner h1 em{font-style:normal;color:var(--primary);}
.banner-sub{margin-top:14px;font-size:15px;color:var(--muted);max-width:720px;}
.banner-line{width:56px;height:2px;background:var(--primary);margin-top:22px;box-shadow:0 0 14px rgba(43,232,198,.6);}
@media (max-width:768px){
  .page-banner{height:280px;}
  .banner-inner{padding-bottom:32px;}
}

/* ---------- Sections ---------- */
.section{padding:96px 0;}
.section.tight{padding:72px 0;}
.section.alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;color:var(--primary);text-transform:uppercase;font-weight:600;margin-bottom:16px;}
.eyebrow::before{content:"";width:16px;height:1px;background:var(--primary);box-shadow:0 0 10px rgba(43,232,198,.8);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;}
.sec-head h2{font-size:clamp(24px,2.6vw,36px);font-weight:700;line-height:1.25;letter-spacing:-.01em;}
.sec-head p{margin-top:12px;font-size:16px;color:var(--muted);max-width:760px;}
@media (max-width:768px){
  .section{padding:64px 0;}
  .section.tight{padding:52px 0;}
  .sec-head{flex-direction:column;align-items:flex-start;margin-bottom:32px;}
}

/* ---------- Metrics ---------- */
.metrics{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.metric{padding:34px 24px;border-right:1px solid var(--line);position:relative;}
.metric:last-child{border-right:0;}
.metric .num{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:clamp(34px,4vw,52px);font-weight:800;line-height:1;color:var(--accent);letter-spacing:-.02em;
}
.metric .num sup{font-size:.42em;font-weight:700;margin-left:4px;color:var(--muted);}
.metric .label{margin-top:12px;font-size:14px;color:var(--muted);}
.metric-note{margin-top:20px;font-size:14px;color:var(--dim);}
@media (max-width:768px){
  .metrics{grid-template-columns:repeat(2,1fr);}
  .metric{border-bottom:1px solid var(--line);padding:26px 18px;}
  .metric:nth-child(2n){border-right:0;}
  .metric:nth-last-child(-n+2){border-bottom:0;}
}

/* ---------- Timeline ---------- */
.timeline-wrap{position:relative;}
.timeline{position:relative;padding:8px 0;}
.timeline::before{
  content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;transform:translateX(-50%);
  background:linear-gradient(180deg,transparent,rgba(43,232,198,.4) 8%,rgba(43,232,198,.4) 92%,transparent);
}
.tl-item{display:grid;grid-template-columns:1fr 88px 1fr;align-items:center;margin-bottom:34px;}
.tl-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 26px 24px;box-shadow:var(--shadow);position:relative;
  transition:transform .22s ease,box-shadow .24s ease,border-color .24s ease;
}
.tl-card::before{
  content:"";position:absolute;top:-1px;left:16px;width:12px;height:12px;
  border-top:1px solid var(--primary);border-left:1px solid var(--primary);opacity:0;transition:opacity .22s ease;
}
.tl-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--line-strong);}
.tl-card:hover::before{opacity:1;}
.tl-item:nth-child(odd) .tl-card{grid-column:1;grid-row:1;}
.tl-item:nth-child(even) .tl-card{grid-column:3;grid-row:1;}
.tl-node{
  grid-column:2;grid-row:1;justify-self:center;
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line-strong);background:var(--bg);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:12px;font-weight:700;color:var(--primary);
  box-shadow:0 0 0 6px rgba(8,9,14,.9);
}
.tl-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:12px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:999px;
  font-size:12px;font-weight:700;background:rgba(43,232,198,.12);color:var(--primary);letter-spacing:.02em;
}
.badge.violet{background:rgba(124,92,255,.16);color:#B6A4FF;}
.badge.accent{background:rgba(203,255,77,.14);color:var(--accent);}
.tl-time{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:13px;color:var(--dim);}
.tl-card h3{font-size:19px;font-weight:700;line-height:1.4;margin-bottom:10px;}
.tl-card p{font-size:15px;color:var(--muted);line-height:1.8;}
.tl-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px;padding-top:16px;border-top:1px solid var(--line);}
.tag{font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:4px 10px;}
.tag.on{color:var(--primary);border-color:var(--line-strong);}
@media (max-width:820px){
  .timeline::before{left:20px;transform:none;}
  .tl-item{grid-template-columns:44px 1fr;align-items:flex-start;margin-bottom:24px;}
  .tl-item .tl-card{grid-column:2 !important;grid-row:1;padding:22px 20px;}
  .tl-item .tl-node{grid-column:1;grid-row:1;justify-self:center;}
}

/* ---------- Focus cards ---------- */
.focus-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);}
.focus-item{padding:30px 24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);}
.focus-item:last-child{border-right:0;}
.focus-item .idx{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:13px;font-weight:700;color:var(--primary);letter-spacing:.1em;}
.focus-item h3{font-size:17px;font-weight:600;margin:14px 0 10px;}
.focus-item p{font-size:14px;color:var(--muted);line-height:1.8;}
@media (max-width:1024px){
  .focus-grid{grid-template-columns:repeat(2,1fr);}
  .focus-item:nth-child(2n){border-right:0;}
}
@media (max-width:520px){
  .focus-grid{grid-template-columns:1fr;}
  .focus-item{border-right:0;padding:24px 18px;}
}

/* ---------- Cover feature ---------- */
.feature{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center;}
.feature-media{grid-column:span 6;position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);}
.feature-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;position:relative;z-index:1;}
.feature-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(8,9,14,.85));z-index:2;}
.feature-media .cap{position:absolute;left:20px;bottom:18px;z-index:3;font-size:13px;color:var(--muted);}
.feature-body{grid-column:span 6;}
.feature-body h2{font-size:clamp(22px,2.4vw,32px);font-weight:700;line-height:1.3;margin-bottom:16px;}
.feature-body p{color:var(--muted);font-size:15px;margin-bottom:14px;}
.check-list{margin:20px 0 28px;display:grid;gap:12px;}
.check-list li{position:relative;padding-left:26px;font-size:15px;color:var(--muted);}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:12px;height:12px;
  border-left:2px solid var(--primary);border-bottom:2px solid var(--primary);transform:rotate(-45deg);
}
@media (max-width:1024px){
  .feature-media,.feature-body{grid-column:span 12;}
}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--text);transition:color .18s ease;
}
.faq-q:hover{color:var(--primary);}
.q-mark{
  flex:0 0 auto;width:26px;height:26px;border-radius:6px;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:12px;font-weight:700;color:var(--primary);
}
.faq-toggle{margin-left:auto;flex:0 0 auto;width:16px;height:16px;position:relative;}
.faq-toggle::before,.faq-toggle::after{content:"";position:absolute;background:var(--muted);transition:transform .24s ease,background .2s ease;}
.faq-toggle::before{left:0;top:7px;width:16px;height:1px;}
.faq-toggle::after{left:7px;top:0;width:1px;height:16px;}
.faq-item.open .faq-toggle::after{transform:rotate(90deg);opacity:0;}
.faq-item.open .faq-toggle::before{background:var(--primary);}
.faq-a{display:grid;grid-template-rows:0fr;opacity:0;transition:grid-template-rows .24s cubic-bezier(.22,.7,.3,1),opacity .24s ease;}
.faq-item.open .faq-a{grid-template-rows:1fr;opacity:1;}
.faq-a>div{overflow:hidden;}
.faq-a p{font-size:15px;line-height:1.8;color:var(--muted);max-width:720px;padding:0 4px 24px 46px;}

/* ---------- CTA ---------- */
.cta-band{
  border:1px solid var(--line-strong);border-radius:var(--r-lg);
  background:linear-gradient(135deg,rgba(43,232,198,.09),rgba(124,92,255,.08));
  padding:44px 40px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;inset:0;opacity:.05;
  background-image:linear-gradient(rgba(255,255,255,.7) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.7) 1px,transparent 1px);
  background-size:24px 24px;pointer-events:none;
}
.cta-band .cta-text{position:relative;z-index:2;max-width:640px;}
.cta-band h2{font-size:clamp(20px,2.2vw,28px);font-weight:700;line-height:1.35;margin-bottom:10px;}
.cta-band p{color:var(--muted);font-size:15px;}
.cta-actions{position:relative;z-index:2;display:flex;gap:14px;flex-wrap:wrap;}
@media (max-width:820px){
  .cta-band{flex-direction:column;align-items:flex-start;padding:32px 24px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;justify-content:center;}
}

/* ---------- Footer ---------- */
.site-footer{
  position:relative;background:var(--bg-soft);
  padding:72px 0 28px;margin-top:0;border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(43,232,198,.6),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand .logo{margin-bottom:18px;}
.footer-brand p{font-size:14px;color:var(--dim);max-width:340px;line-height:1.8;}
.footer-col h4{font-size:14px;font-weight:700;color:var(--text);margin-bottom:18px;letter-spacing:.02em;}
.footer-col li{margin-bottom:12px;}
.footer-col a{font-size:14px;color:var(--muted);display:inline-block;transition:color .18s ease,transform .18s ease;}
.footer-col a:hover{color:var(--primary);transform:translateX(2px);}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:var(--dim);flex-wrap:wrap;
}
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .site-footer{padding:56px 0 24px;}
}

/* ---------- Motion ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .36s cubic-bezier(.22,.7,.3,1),transform .36s cubic-bezier(.22,.7,.3,1);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation:none !important;transition:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category3 */
:root{
  --bg:#08090E;
  --bg2:#0E1118;
  --card:#141824;
  --layer:#1A1F2D;
  --primary:#2BE8C6;
  --secondary:#7C5CFF;
  --accent:#CBFF4D;
  --text:#E8ECF3;
  --text2:#96A0B2;
  --muted:#5C6675;
  --line:rgba(255,255,255,.08);
  --stroke:rgba(43,232,198,.35);
  --ok:#34D399;
  --warn:#FFB020;
  --err:#FF5A6E;
  --r-card:16px;
  --r-sm:12px;
  --r-btn:10px;
  --sh:0 10px 30px rgba(0,0,0,.45);
  --sh-hover:0 18px 40px rgba(0,0,0,.55),0 0 0 1px rgba(43,232,198,.35),0 0 24px rgba(43,232,198,.18);
  --container:1240px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter","Space Grotesk",-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25}
p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}
::selection{background:rgba(43,232,198,.28);color:#fff}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,9,14,.86);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  background-image:linear-gradient(rgba(10,9,14,.86),rgba(10,9,14,.86)),linear-gradient(90deg,rgba(43,232,198,.55),rgba(43,232,198,0));
  background-origin:border-box;
  background-clip:padding-box,border-box;
  transition:background-color .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{
  background-color:#0A0910;
  box-shadow:0 12px 30px rgba(0,0,0,.55);
}
.nav{display:flex;align-items:center;gap:28px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:-.01em;white-space:nowrap}
.logo .dot{
  width:12px;height:12px;border-radius:4px;flex:none;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  box-shadow:0 0 14px rgba(43,232,198,.65);
}
.logo b{color:var(--primary);font-weight:800}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:26px}
.nav-links a{
  position:relative;font-size:15px;color:var(--text2);padding:6px 0;
  transition:color .18s ease,text-shadow .18s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);text-shadow:0 0 12px rgba(43,232,198,.5)}
.nav-links a.active::after{transform:scaleX(1)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--r-btn);font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--primary);color:#061014}
.btn-primary:hover{
  background:#47EFD2;transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(43,232,198,.5),0 10px 26px rgba(43,232,198,.28);
}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text);border-color:rgba(255,255,255,.16)}
.btn-ghost:hover{color:var(--primary);border-color:var(--stroke);background:rgba(43,232,198,.06);transform:translateY(-1px)}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.nav-cta{padding:10px 20px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text);border-radius:2px;transition:transform .24s ease,opacity .24s ease}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:88;
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
}
.nav-mask.show{opacity:1;visibility:visible}

/* 通用区块 */
section{position:relative}
.sec{padding:88px 0}
.sec-sm{padding:64px 0}
.grid-bg::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  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:24px 24px;opacity:.5;
  mask-image:radial-gradient(ellipse at 50% 0%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000 20%,transparent 78%);
}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:.18em;color:var(--primary);text-transform:uppercase;
  font-family:var(--font-num);
}
.eyebrow::before{content:"";width:16px;height:1px;background:var(--primary);box-shadow:0 0 10px rgba(43,232,198,.8)}
.sec-title{font-size:clamp(24px,2.6vw,36px);letter-spacing:-.01em;margin-top:12px}
.sec-desc{font-size:16px;color:var(--text2);max-width:760px;margin-top:12px}
.more-link{
  position:relative;color:var(--primary);font-size:15px;font-weight:600;padding-bottom:2px;white-space:nowrap;
}
.more-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;background:var(--primary);
  transform:scaleX(.35);transform-origin:left;transition:transform .22s ease;
}
.more-link:hover::after{transform:scaleX(1)}

/* 首屏 */
.hero{
  position:relative;overflow:hidden;
  display:flex;align-items:center;
  min-height:min(74vh,560px);
  padding:72px 0 56px;
  isolation:isolate;
}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.42}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(8,9,14,.72) 0%,rgba(8,9,14,.9) 58%,var(--bg) 100%),
    radial-gradient(700px 320px at 88% 8%,rgba(43,232,198,.16),transparent 70%);
}
.hero-grid{
  position:absolute;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:24px 24px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);
}
.hero-inner{max-width:720px}
.hero h1{
  font-size:clamp(32px,4.6vw,54px);
  line-height:1.14;letter-spacing:-.02em;font-weight:800;margin-top:16px;
}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-sub{font-size:clamp(16px,1.4vw,19px);color:var(--text2);margin-top:20px;max-width:660px}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px}
.hero-rule{width:72px;height:1px;background:var(--primary);box-shadow:0 0 12px rgba(43,232,198,.9);margin-top:34px}
.trust{display:flex;flex-wrap:wrap;gap:18px;margin-top:20px;font-size:13px;color:var(--text2)}
.trust span{display:inline-flex;align-items:center;gap:18px}
.trust span+span{padding-left:18px;border-left:1px solid var(--line)}

/* 筛选条 */
.chips-wrap{padding:34px 0 8px;border-bottom:1px solid var(--line)}
.chips{display:flex;flex-wrap:wrap;gap:12px;padding-bottom:26px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:999px;font-size:14px;color:var(--text2);
  background:var(--bg2);border:1px solid var(--line);
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
  cursor:default;
}
.chip:hover{color:var(--text);border-color:rgba(255,255,255,.2)}
.chip.active{color:var(--primary);border-color:var(--stroke);background:rgba(43,232,198,.12)}
.chip .cnt{font-family:var(--font-num);font-size:12px;color:var(--muted)}
.chip.active .cnt{color:var(--primary)}

/* 卡片栅格 */
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;margin:36px 0 26px}
.toolbar .count{font-size:14px;color:var(--text2)}
.toolbar .count b{color:var(--accent);font-family:var(--font-num);font-size:18px}
.sort-static{display:flex;gap:10px;font-size:13px;color:var(--muted)}
.sort-static .on{color:var(--primary)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tcard{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.tcard::after{
  content:"";position:absolute;top:10px;left:10px;width:12px;height:12px;
  border-top:1px solid var(--primary);border-left:1px solid var(--primary);
  opacity:0;transition:opacity .22s ease;z-index:3;
}
.tcard:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:var(--stroke)}
.tcard:hover::after{opacity:1}
.tcard-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg2)}
.tcard-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s cubic-bezier(.22,.7,.3,1)}
.tcard:hover .tcard-media img{transform:scale(1.04)}
.tcard-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,9,14,0) 42%,rgba(20,24,36,.92) 100%);
}
.tcard-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:12px;flex:1}
.tcard h3{
  font-size:17px;font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s ease;
}
.tcard:hover h3{color:var(--primary)}
.tcard-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:12px;border-top:1px solid var(--line)}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;
  font-size:12px;color:var(--primary);background:rgba(43,232,198,.12);
}
.tag.purple{color:#B8A6FF;background:rgba(124,92,255,.16)}
.tcard-foot time{font-size:13px;color:var(--muted);font-family:var(--font-num);font-variant-numeric:tabular-nums}

/* 要点 Bento */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.bento-main{
  grid-column:span 5;position:relative;overflow:hidden;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  display:flex;flex-direction:column;
}
.bento-main img{width:100%;height:230px;object-fit:cover;opacity:.85}
.bento-main .bm-body{padding:24px}
.bento-main h3{font-size:20px;margin-bottom:10px}
.bento-main p{color:var(--text2);font-size:15px}
.bento-side{grid-column:span 7;display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--card)}
.bento-cell{
  padding:26px 24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  transition:background-color .2s ease;
}
.bento-cell:nth-child(2n){border-right:0}
.bento-cell:nth-child(n+3){border-bottom:0}
.bento-cell:hover{background:var(--layer)}
.bento-cell .idx{font-family:var(--font-num);font-size:13px;color:var(--accent);letter-spacing:.12em}
.bento-cell h3{font-size:17px;font-weight:600;margin:10px 0 8px}
.bento-cell p{font-size:14px;color:var(--text2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.bento-cell .arrow{display:inline-block;margin-top:14px;color:var(--primary);font-size:13px}

/* 数据条 */
.stats{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stats-inner{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:42px 24px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat .v{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:clamp(34px,3.4vw,50px);font-weight:800;color:var(--accent);line-height:1;
}
.stat .v small{font-size:15px;font-weight:600;margin-left:4px;color:var(--text2)}
.stat .k{margin-top:12px;font-size:14px;color:var(--text2)}
.stats-note{padding:0 0 28px;font-size:14px;color:var(--muted);text-align:center}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:16px}
.step{position:relative;padding:8px 22px 0}
.step .node{
  width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--stroke);color:var(--primary);font-family:var(--font-num);font-size:14px;font-weight:700;
  background:rgba(43,232,198,.06);position:relative;z-index:2;
}
.step::before{
  content:"";position:absolute;top:30px;left:0;right:0;height:1px;background:var(--line);z-index:1;
}
.step:first-child::before{left:22px}
.step h3{font-size:17px;margin:18px 0 8px}
.step p{font-size:14px;color:var(--text2)}

/* FAQ */
.faq-list{margin-top:8px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  padding:22px 0;font-size:17px;font-weight:600;color:var(--text);
  transition:color .18s ease;
}
.faq-q:hover{color:var(--primary)}
.faq-q .qmark{
  flex:none;width:26px;height:26px;border-radius:6px;border:1px solid var(--stroke);
  color:var(--primary);font-size:13px;font-family:var(--font-num);font-weight:700;
  display:flex;align-items:center;justify-content:center;
}
.faq-q .sign{margin-left:auto;position:relative;width:16px;height:16px;flex:none}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:var(--text2);transition:transform .24s ease,background-color .24s ease;
}
.faq-q .sign::before{left:0;top:7px;width:16px;height:1px}
.faq-q .sign::after{top:0;left:7px;width:1px;height:16px}
.faq-item.open .faq-q .sign::after{transform:scaleY(0)}
.faq-item.open .faq-q{color:var(--primary)}
.faq-item.open .faq-q .sign::before{background:var(--primary)}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .24s ease,opacity .24s ease}
.faq-item.open .faq-a{max-height:280px;opacity:1}
.faq-a p{font-size:15px;line-height:1.8;color:var(--text2);max-width:720px;padding:0 0 24px 42px}

/* CTA */
.cta-band{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:44px 0;
}
.cta-inner h2{font-size:clamp(22px,2.2vw,30px)}
.cta-inner p{color:var(--text2);font-size:15px;margin-top:10px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 页脚 */
.site-footer{
  position:relative;background:#080910;padding:64px 0 28px;
  border-top:1px solid transparent;
  background-image:linear-gradient(#080910,#080910),linear-gradient(90deg,rgba(43,232,198,.6),rgba(124,92,255,.25));
  background-origin:border-box;background-clip:padding-box,border-box;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text2);max-width:380px}
.footer-col h4{font-size:14px;letter-spacing:.08em;color:var(--text);margin-bottom:16px;font-weight:700}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:var(--text2);display:inline-block;transition:color .18s ease,transform .18s ease}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom .num{font-family:var(--font-num)}

/* 动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .36s cubic-bezier(.22,.7,.3,1),transform .36s cubic-bezier(.22,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* 响应式 */
@media (max-width:1280px){
  .card-grid{grid-template-columns:repeat(3,1fr);gap:20px}
}
@media (max-width:1024px){
  .sec{padding:68px 0}
  .nav-links{
    position:fixed;top:0;right:0;z-index:90;
    width:84vw;max-width:360px;height:100vh;
    background:var(--bg2);border-left:1px solid var(--line);
    flex-direction:column;align-items:flex-start;gap:0;
    padding:88px 28px 32px;
    transform:translateX(100%);transition:transform .3s cubic-bezier(.22,.7,.3,1);
    margin-left:0;
  }
  .nav-links.open{transform:translateX(0)}
  .nav-links a{font-size:18px;width:100%;padding:14px 0 14px 14px;border-bottom:1px solid var(--line)}
  .nav-links a::after{display:none}
  .nav-links a.active{border-left:3px solid var(--primary);padding-left:11px}
  .nav-toggle{display:flex;margin-left:auto}
  .nav-cta{display:none}
  .hero{min-height:auto;padding:56px 0 48px}
  .bento-main{grid-column:span 12}
  .bento-side{grid-column:span 12}
  .stats-inner{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px 0}
  .step:nth-child(3)::before{left:22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .sec{padding:56px 0}
  .sec-sm{padding:48px 0}
  .card-grid{grid-template-columns:1fr;gap:20px}
  .bento-side{grid-template-columns:1fr}
  .bento-cell{border-right:0;border-bottom:1px solid var(--line)}
  .bento-cell:nth-child(n+3){border-bottom:1px solid var(--line)}
  .bento-cell:last-child{border-bottom:0}
  .steps{grid-template-columns:1fr;gap:0}
  .step{padding:0 0 26px 0;border-left:1px solid var(--line);margin-left:21px;padding-left:26px}
  .step::before{display:none}
  .step .node{margin-left:-48px;background:var(--bg)}
  .faq-a p{padding-left:0}
  .cta-inner{padding:36px 0}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .hero h1{font-size:30px}
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .stats-inner{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line);padding:32px 20px}
  .stat:last-child{border-bottom:0}
  .tcard{border-radius:14px}
  .trust span+span{padding-left:0;border-left:0}
  .trust{flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --bg:#08090E;
  --bg-2:#0E1118;
  --card:#141824;
  --layer:#1A1F2D;
  --primary:#2BE8C6;
  --primary-dark:#061014;
  --secondary:#7C5CFF;
  --accent:#CBFF4D;
  --text:#E8ECF3;
  --muted:#96A0B2;
  --dim:#5C6675;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --stroke:rgba(43,232,198,.35);
  --ok:#34D399;
  --warn:#FFB020;
  --err:#FF5A6E;
  --radius:16px;
  --radius-sm:12px;
  --radius-btn:10px;
  --shadow:0 10px 30px rgba(0,0,0,.45);
  --shadow-hover:0 18px 40px rgba(0,0,0,.55),0 0 0 1px rgba(43,232,198,.35),0 0 24px rgba(43,232,198,.18);
  --container:1240px;
  --gap:24px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter","Space Grotesk","PingFang SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease,opacity .18s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px}
::selection{background:rgba(43,232,198,.28);color:#fff}
.num{font-family:var(--font-num);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media (min-width:1440px){:root{--container:1320px}}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,9,14,.86);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  transition:background .2s ease,box-shadow .2s ease;
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,rgba(43,232,198,.6),rgba(43,232,198,0) 70%);
}
.site-header.scrolled{background:rgba(8,9,14,.96);box-shadow:0 12px 30px rgba(0,0,0,.5)}
.nav{display:flex;align-items:center;gap:28px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.logo b{color:var(--primary)}
.logo .dot{
  width:12px;height:12px;border-radius:4px;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  box-shadow:0 0 14px rgba(43,232,198,.6);flex:0 0 auto;
}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-links a{
  position:relative;font-size:15px;color:var(--muted);padding:8px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--primary);text-shadow:0 0 12px rgba(43,232,198,.5)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{margin-left:8px}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;position:relative;border-radius:10px;
}
.nav-toggle span{
  position:absolute;left:11px;right:11px;height:2px;background:var(--text);border-radius:2px;
  transition:transform .24s ease,opacity .24s ease;
}
.nav-toggle span:nth-child(1){top:15px}
.nav-toggle span:nth-child(2){top:21px}
.nav-toggle span:nth-child(3){top:27px}
.nav-toggle.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 20px;border-radius:var(--radius-btn);font-size:15px;font-weight:700;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:var(--primary-dark)}
.btn-primary:hover{background:#48f0d3;transform:translateY(-1px);box-shadow:0 0 22px rgba(43,232,198,.35)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border:1px solid var(--line-strong);color:var(--text);background:transparent}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);background:rgba(43,232,198,.06)}
.btn-link{
  color:var(--primary);font-weight:700;font-size:15px;position:relative;padding-bottom:2px;
}
.btn-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.btn-link:hover::after{transform:scaleX(1)}

/* ---------- 页头 banner ---------- */
.page-hero{
  position:relative;overflow:hidden;
  min-height:360px;display:flex;align-items:center;
  border-bottom:1px solid var(--line);
}
.page-hero .hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.42}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(8,9,14,.96) 18%,rgba(8,9,14,.72) 58%,rgba(8,9,14,.9) 100%);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:24px 24px;
}
.page-hero .container{position:relative;z-index:2;padding-top:56px;padding-bottom:56px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--dim);margin-bottom:18px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{color:var(--stroke)}
.crumb .now{color:var(--dim)}
.page-hero h1{
  font-size:clamp(30px,4.2vw,52px);font-weight:800;line-height:1.14;letter-spacing:-.02em;max-width:760px;
}
.page-hero h1 em{font-style:normal;color:var(--primary)}
.page-hero .lead{margin-top:18px;max-width:660px;font-size:17px;color:var(--muted)}
.hero-meta{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.pill{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  font-size:13px;color:var(--primary);background:rgba(43,232,198,.12);border:1px solid rgba(43,232,198,.22);
}
.pill.dim{color:var(--muted);background:rgba(255,255,255,.04);border-color:var(--line)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0;position:relative}
.section.tight{padding:72px 0}
.section.alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--primary);margin-bottom:14px;
}
.eyebrow::before{content:"";width:16px;height:1px;background:var(--primary);box-shadow:0 0 8px rgba(43,232,198,.8)}
.section-head h2{font-size:clamp(24px,2.6vw,36px);font-weight:700;line-height:1.25;letter-spacing:-.01em}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px;max-width:720px}
.grid-bg{
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:24px 24px;
}

/* ---------- 准备清单 ---------- */
.check-layout{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:48px;align-items:center}
.check-figure{border-radius:14px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);position:relative}
.check-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.check-figure figcaption{
  position:absolute;left:16px;bottom:14px;font-size:13px;color:var(--muted);
  background:rgba(8,9,14,.72);padding:6px 12px;border-radius:999px;border:1px solid var(--line);
}
.check-list{display:grid;gap:0}
.check-item{display:flex;gap:18px;padding:22px 0;border-bottom:1px solid var(--line)}
.check-item:first-child{padding-top:0}
.check-item:last-child{border-bottom:0;padding-bottom:0}
.check-mark{
  flex:0 0 auto;width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  border:1px solid var(--stroke);color:var(--primary);font-size:15px;font-weight:700;
}
.check-item h3{font-size:17px;font-weight:600;margin-bottom:4px}
.check-item p{color:var(--muted);font-size:15px}

/* ---------- 步骤 + 侧栏 ---------- */
.install-layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:48px;align-items:start}
.step-list{border-top:1px solid var(--line)}
.step-item{display:flex;gap:26px;padding:32px 0;border-bottom:1px solid var(--line);position:relative}
.step-item::before{
  content:"";position:absolute;left:0;top:-1px;width:0;height:1px;background:var(--primary);
  transition:width .3s ease;
}
.step-item:hover::before{width:96px}
.step-num{
  flex:0 0 auto;font-family:var(--font-num);font-variant-numeric:tabular-nums;
  font-size:38px;font-weight:800;line-height:1;color:var(--accent);letter-spacing:-.03em;
  min-width:72px;
}
.step-num small{display:block;font-size:12px;font-weight:600;color:var(--dim);letter-spacing:.14em;margin-top:8px}
.step-body h3{font-size:20px;font-weight:700;margin-bottom:10px}
.step-body p{color:var(--muted);font-size:15.5px;max-width:640px}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{
  font-size:12px;color:var(--muted);padding:4px 11px;border-radius:999px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
}
.tag.hot{color:var(--accent);border-color:rgba(203,255,77,.28);background:rgba(203,255,77,.08)}

.info-card{
  position:sticky;top:96px;
  background:var(--card);border:1px solid rgba(43,232,198,.22);border-radius:var(--radius);
  padding:28px 26px;box-shadow:var(--shadow);
}
.info-card h3{font-size:17px;font-weight:700;margin-bottom:6px}
.info-card .info-sub{font-size:13px;color:var(--dim);margin-bottom:20px}
.info-block{padding:18px 0;border-top:1px solid var(--line)}
.info-block:first-of-type{border-top:0;padding-top:0}
.info-block h4{font-size:13px;letter-spacing:.14em;color:var(--primary);margin-bottom:12px;font-weight:600}
.info-row{display:flex;align-items:baseline;justify-content:space-between;gap:14px;padding:7px 0;font-size:14px}
.info-row span:first-child{color:var(--muted)}
.info-row span:last-child{color:var(--text);font-weight:600}
.info-note{margin-top:18px;padding:14px;border-radius:var(--radius-sm);background:rgba(255,176,32,.08);border:1px solid rgba(255,176,32,.24);font-size:13.5px;color:#F2D8A8;line-height:1.7}

/* ---------- 数据条 ---------- */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:rgba(20,24,36,.7);
}
.stat{padding:28px 24px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat .val{
  font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:clamp(32px,3.4vw,46px);
  font-weight:800;color:var(--accent);line-height:1.05;letter-spacing:-.02em;
}
.stat .val sup{font-size:.42em;color:var(--muted);margin-left:4px;font-weight:600}
.stat .lbl{margin-top:10px;font-size:14px;color:var(--muted)}

/* ---------- 排查卡片 ---------- */
.trouble-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;position:relative;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card::before{
  content:"";position:absolute;left:14px;top:14px;width:12px;height:12px;
  border-left:1px solid var(--primary);border-top:1px solid var(--primary);
  opacity:0;transition:opacity .22s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:var(--stroke)}
.card:hover::before{opacity:1}
.card h3{font-size:17px;font-weight:600;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
.card .step-tags{margin-top:16px}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);max-width:960px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;padding:22px 0;
  font-size:17px;font-weight:600;color:var(--text);
}
.faq-q .q-badge{
  flex:0 0 auto;width:28px;height:28px;border-radius:8px;display:grid;place-items:center;
  border:1px solid var(--stroke);color:var(--primary);font-size:13px;font-weight:700;
  font-family:var(--font-num);
}
.faq-q .sign{margin-left:auto;position:relative;width:16px;height:16px;flex:0 0 auto}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;background:var(--muted);transition:transform .24s ease,background .24s ease;
}
.faq-q .sign::before{left:0;right:0;top:7px;height:1px}
.faq-q .sign::after{top:0;bottom:0;left:7px;width:1px}
.faq-item.open .faq-q .sign::after{transform:scaleY(0)}
.faq-item.open .faq-q{color:var(--primary)}
.faq-item.open .faq-q .sign::before{background:var(--primary)}
.faq-a{max-height:0;overflow:hidden;opacity:0;transition:max-height .24s ease,opacity .24s ease}
.faq-item.open .faq-a{max-height:420px;opacity:1}
.faq-a p{padding:0 0 24px 44px;font-size:15px;line-height:1.8;color:var(--muted);max-width:760px}

/* ---------- CTA 条 ---------- */
.cta-bar{
  position:relative;overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:linear-gradient(90deg,rgba(43,232,198,.10),rgba(124,92,255,.10) 60%,rgba(8,9,14,0) 100%);
}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:56px 0;
}
.cta-inner h2{font-size:clamp(22px,2.4vw,32px);font-weight:700;line-height:1.28;max-width:620px}
.cta-inner p{margin-top:12px;color:var(--muted);font-size:15.5px;max-width:600px}
.cta-actions{display:flex;gap:14px;flex:0 0 auto}

/* ---------- 页脚 ---------- */
.site-footer{position:relative;background:var(--bg-2);padding-top:64px;margin-top:0}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(43,232,198,0),rgba(43,232,198,.7),rgba(124,92,255,.5),rgba(43,232,198,0));
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--muted);max-width:360px}
.footer-col h4{font-size:14px;font-weight:700;color:var(--text);margin-bottom:16px;letter-spacing:.04em}
.footer-col li{margin-bottom:12px}
.footer-col a{font-size:14px;color:var(--muted);display:inline-block;transition:color .18s ease,transform .18s ease}
.footer-col a:hover{color:var(--primary);transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 28px;border-top:1px solid var(--line);font-size:13px;color:var(--dim);
}

/* ---------- 动效 ---------- */
.fade-up{opacity:0;transform:translateY(16px);transition:opacity .36s cubic-bezier(.22,.7,.3,1),transform .36s cubic-bezier(.22,.7,.3,1)}
.fade-up.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .install-layout{grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:36px}
  .check-layout{gap:36px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .section.tight{padding:56px 0}
  .check-layout{grid-template-columns:1fr;gap:32px}
  .install-layout{grid-template-columns:1fr;gap:36px}
  .info-card{position:static}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat{border-left:1px solid var(--line)}
  .stat:nth-child(odd){border-left:0}
  .stat:nth-child(n+3){border-top:1px solid var(--line)}
  .trouble-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:48px 0}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .nav{height:60px;gap:16px}
  .nav-links{
    position:fixed;top:0;right:0;height:100vh;width:84vw;max-width:340px;
    flex-direction:column;align-items:flex-start;gap:6px;margin:0;padding:88px 26px 32px;
    background:var(--bg-2);border-left:1px solid var(--line);z-index:90;
    transform:translateX(100%);transition:transform .28s cubic-bezier(.22,.7,.3,1);
    box-shadow:-20px 0 60px rgba(0,0,0,.6);
  }
  .nav-links.open{transform:translateX(0)}
  .nav-links a{font-size:18px;width:100%;padding:12px 14px;color:var(--text)}
  .nav-links a.active{color:var(--primary);box-shadow:inset 3px 0 0 var(--primary)}
  .nav-links a::after{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:block}
  .page-hero{min-height:300px}
  .page-hero .container{padding-top:40px;padding-bottom:40px}
  .section{padding:56px 0}
  .section.tight{padding:48px 0}
  .section-head{margin-bottom:32px}
  .step-item{flex-direction:column;gap:14px;padding:26px 0}
  .step-num{font-size:32px;min-width:0}
  .trouble-grid{grid-template-columns:1fr}
  .faq-a p{padding-left:0}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .cta-actions{width:100%;flex-direction:column}
  .cta-actions .btn{width:100%}
}
@media (max-width:520px){
  .stats{grid-template-columns:1fr}
  .stat{border-left:0}
  .stat+.stat{border-top:1px solid var(--line)}
  .page-hero h1{font-size:clamp(26px,7.6vw,34px)}
  .card{padding:24px 20px}
  .btn{padding:12px 18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .fade-up{opacity:1;transform:none}
}