/* roulang page: index */
:root{
  --bg:#08090C;
  --bg-2:#0F1116;
  --surface:#14171E;
  --surface-2:#181C24;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --primary:#2FE3C8;
  --primary-d:#12B39B;
  --accent:#7C5CFF;
  --hot:#FF5C7A;
  --t1:#EDF1F7;
  --t2:#A8B2C1;
  --t3:#6E7787;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --sh:0 1px 0 rgba(255,255,255,.04), 0 18px 40px -20px rgba(0,0,0,.8);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --sec:96px;
}
@media (min-width:1440px){:root{--container:1280px;}}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--t1);
  background-color:var(--bg);
  background-image:
    radial-gradient(circle at 10% -8%, rgba(124,92,255,.16), transparent 44%),
    radial-gradient(circle at 92% 2%, rgba(47,227,200,.12), transparent 40%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--r-img);}
a{color:var(--primary);text-decoration:none;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);}
a:hover{color:#7ff3e0;}
h1,h2,h3,h4,h5,h6{
  margin:0 0 .6em;
  font-family:inherit;
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.3;
  color:var(--t1);
}
h1{font-size:44px;line-height:1.22;}
h2{font-size:30px;line-height:1.3;}
h3{font-size:20px;line-height:1.45;}
p{margin:0 0 1em;color:var(--t2);}
ul,ol{margin:0 0 1em;padding-left:1.2em;color:var(--t2);}
li{margin-bottom:.4em;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:var(--sec) 0;position:relative;}
.section--tight{padding:64px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.section-head .label-no{
  font-size:12px;letter-spacing:.22em;color:var(--primary);
  display:block;margin-bottom:10px;font-weight:700;
}
.section-head h2{margin-bottom:8px;}
.section-head p{margin:0;max-width:620px;font-size:15px;color:var(--t2);}
.section-head .head-link{font-size:14px;color:var(--t2);white-space:nowrap;border-bottom:1px solid var(--line-2);padding-bottom:4px;}
.section-head .head-link:hover{color:var(--primary);border-color:var(--primary);}
.hr-neon{height:1px;border:0;margin:0;background:linear-gradient(90deg,transparent,rgba(47,227,200,.55),rgba(124,92,255,.4),transparent);}
/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,9,12,.86);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.6),rgba(124,92,255,.5),transparent);
}
.nav-inner{display:flex;align-items:center;gap:20px;height:64px;}
.brand{display:flex;align-items:center;gap:10px;color:var(--t1);flex:0 0 auto;}
.brand:hover{color:var(--t1);}
.brand-mark{
  width:22px;height:22px;border-radius:7px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 18px -4px rgba(47,227,200,.75);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:6px;border-radius:3px;background:rgba(8,9,12,.85);
}
.brand-text{font-size:18px;font-weight:800;letter-spacing:.02em;}
.nav-main{display:flex;align-items:center;gap:6px;flex:1 1 auto;min-width:0;}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;height:40px;padding:0 12px;
  font-size:14px;color:var(--t2);border-radius:var(--r-btn);
  white-space:nowrap;
}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.04);}
.nav-link.is-active{color:var(--primary);}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 10px rgba(47,227,200,.8);
}
.nav-link.is-active::before{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:-4px;
  width:4px;height:4px;border-radius:50%;background:var(--primary);
}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line-2);background:transparent;color:var(--t1);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn-primary{background:var(--primary);color:#06110F;box-shadow:0 10px 26px -14px rgba(47,227,200,.9);}
.btn-primary:hover{background:#57efd8;color:#06110F;transform:translateY(-2px);box-shadow:0 14px 30px -12px rgba(47,227,200,.9);}
.btn-primary:active{transform:translateY(0);background:var(--primary-d);}
.btn-secondary{background:transparent;color:var(--t1);border-color:var(--line-2);}
.btn-secondary:hover{background:rgba(47,227,200,.12);border-color:var(--primary);color:var(--primary);transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--t2);border-color:transparent;padding-left:12px;padding-right:12px;}
.btn-ghost:hover{color:var(--primary);}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.34;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,9,12,.55) 0%,rgba(8,9,12,.88) 62%,var(--bg) 100%);
}
.hero::after{
  content:"";position:absolute;left:-10%;top:-30%;width:60%;height:120%;
  background:radial-gradient(circle,rgba(124,92,255,.22),transparent 62%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2;padding:88px 0 56px;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.2em;color:var(--primary);font-weight:700;
  padding:6px 12px;border:1px solid rgba(47,227,200,.35);border-radius:999px;
  background:rgba(47,227,200,.06);margin-bottom:22px;
}
.hero h1{margin-bottom:18px;}
.hero h1 em{font-style:normal;color:var(--primary);}
.hero-lead{font-size:17px;color:var(--t2);max-width:560px;margin-bottom:30px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px;}
.hero-stats{display:flex;flex-wrap:wrap;gap:28px;}
.hero-stats .stat-num{font-size:22px;font-weight:800;color:var(--t1);font-variant-numeric:tabular-nums;}
.hero-stats .stat-label{font-size:13px;color:var(--t3);}
.hero-figure{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh);
}
.hero-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;}
.hero-figure .fig-cap{
  position:absolute;left:0;right:0;bottom:0;padding:16px 18px;
  background:linear-gradient(180deg,transparent,rgba(8,9,12,.92));
  font-size:13px;color:var(--t2);
}
.index-bar{
  position:relative;z-index:2;border-top:1px solid var(--line);
  background:rgba(15,17,22,.72);
}
.index-bar ul{
  list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin:0;padding:14px 0;font-size:12px;letter-spacing:.06em;color:var(--t3);
}
.index-bar li{display:inline-flex;align-items:center;gap:22px;margin:0;}
.index-bar li+li::before{content:"/";color:var(--line-2);}
.index-bar a{color:var(--t2);}
.index-bar a:hover{color:var(--primary);}
/* ---------- data strip ---------- */
.data-strip{background:var(--bg-2);border-bottom:1px solid var(--line);}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);}
.data-cell{background:var(--bg-2);padding:26px 22px;}
.data-cell .num{font-size:26px;font-weight:800;color:var(--primary);font-variant-numeric:tabular-nums;}
.data-cell .txt{font-size:13px;color:var(--t3);margin-top:4px;}
/* ---------- cards ---------- */
.card{
  height:100%;display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(47,227,200,.55);box-shadow:0 0 0 1px rgba(47,227,200,.35),0 0 24px -6px rgba(47,227,200,.45);}
.card-thumb{position:relative;overflow:hidden;background:#0b0d11;}
.card-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;transition:transform .35s var(--ease);}
.card:hover .card-thumb img{transform:scale(1.04);}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
  font-size:12px;letter-spacing:.06em;font-weight:600;
  background:rgba(124,92,255,.16);color:#c0b0ff;border:1px solid rgba(124,92,255,.32);
}
.badge--on-image{position:absolute;left:12px;top:12px;background:rgba(8,9,12,.78);color:var(--primary);border-color:rgba(47,227,200,.4);backdrop-filter:blur(6px);}
.badge--hot{background:rgba(255,92,122,.14);color:#ff9db0;border-color:rgba(255,92,122,.34);}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1 1 auto;}
.card-body h3{font-size:18px;margin-bottom:10px;}
.card-body h3 a{color:var(--t1);}
.card-body h3 a:hover{color:var(--primary);}
.card-desc{font-size:14px;color:var(--t2);margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--t3);
}
.card-meta .arrow{color:var(--primary);transition:transform .18s var(--ease);}
.card:hover .card-meta .arrow{transform:translateX(4px);}
/* ---------- posts ---------- */
.post-card{
  height:100%;display:flex;gap:16px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:16px;box-shadow:var(--sh);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.post-card:hover{transform:translateY(-2px);border-color:rgba(47,227,200,.5);box-shadow:0 0 0 1px rgba(47,227,200,.3),0 0 24px -8px rgba(47,227,200,.4);}
.post-thumb{flex:0 0 104px;width:104px;height:104px;border-radius:10px;overflow:hidden;background:#0b0d11;}
.post-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.post-body{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;}
.post-body h3{font-size:16px;margin:8px 0 8px;line-height:1.5;}
.post-body h3 a{color:var(--t1);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-body h3 a:hover{color:var(--primary);}
.post-excerpt{font-size:13px;color:var(--t2);margin:0 0 10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{margin-top:auto;font-size:12px;color:var(--t3);display:flex;gap:12px;flex-wrap:wrap;}
.empty-state{
  border:1px dashed var(--line-2);border-radius:var(--r-card);min-height:180px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  background:rgba(20,23,30,.5);text-align:center;padding:24px;
}
.empty-state .icon{width:38px;height:38px;border-radius:50%;border:1px solid var(--line-2);display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:18px;}
.empty-state strong{font-size:15px;color:var(--t1);}
.empty-state span{font-size:13px;color:var(--t3);}
/* ---------- mini recommend ---------- */
.mini-card{
  display:flex;gap:12px;align-items:center;height:100%;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);padding:12px;
  transition:border-color .18s var(--ease),transform .18s var(--ease);
}
.mini-card:hover{border-color:rgba(124,92,255,.5);transform:translateY(-2px);}
.mini-card img{width:64px;height:64px;flex:0 0 64px;object-fit:cover;border-radius:10px;}
.mini-card .mini-body{min-width:0;}
.mini-card h3{font-size:15px;margin:0 0 4px;}
.mini-card h3 a{color:var(--t1);}
.mini-card h3 a:hover{color:var(--primary);}
.mini-card p{font-size:12px;color:var(--t3);margin:0;}
/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:linear-gradient(120deg,rgba(47,227,200,.12),rgba(124,92,255,.14));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:repeating-linear-gradient(180deg,rgba(255,255,255,.045) 0 1px,transparent 1px 6px);
  opacity:.55;pointer-events:none;
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:28px;padding:38px 0;flex-wrap:wrap;}
.cta-inner h2{font-size:24px;margin-bottom:6px;}
.cta-inner p{margin:0;font-size:14px;color:var(--t2);}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}
/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;}
.faq-item.is-open{border-color:rgba(47,227,200,.45);box-shadow:0 0 0 1px rgba(47,227,200,.22);}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 20px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:700;color:var(--t1);
}
.faq-q:hover{color:var(--primary);}
.faq-q .sign{flex:0 0 22px;position:relative;width:22px;height:22px;}
.faq-q .sign::before,.faq-q .sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--primary);border-radius:2px;
  transform:translate(-50%,-50%);transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.faq-q .sign::before{width:12px;height:2px;}
.faq-q .sign::after{width:2px;height:12px;}
.faq-item.is-open .faq-q .sign::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease);}
.faq-a p{margin:0;padding:0 20px 20px;font-size:14px;color:var(--t2);}
/* ---------- subscribe ---------- */
.subscribe{
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;
}
.subscribe h2{font-size:22px;margin-bottom:8px;}
.subscribe p{margin:0;font-size:14px;}
.form-row{display:flex;gap:12px;flex-wrap:wrap;}
.field{flex:1 1 220px;min-width:0;}
.field label{display:block;font-size:13px;color:var(--t2);margin-bottom:6px;letter-spacing:.02em;}
.field input{
  width:100%;height:46px;padding:0 14px;border-radius:var(--r-btn);
  background:#0B0D12;border:1px solid var(--line-2);color:var(--t1);font-size:15px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field input::placeholder{color:var(--t3);}
.field input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,227,200,.18);}
.field input.is-error{border-color:var(--hot);box-shadow:0 0 0 3px rgba(255,92,122,.16);}
.form-hint{font-size:12px;color:var(--t3);margin-top:8px;width:100%;}
.form-hint.is-error{color:var(--hot);}
/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:#060709;margin-top:0;}
.site-footer::before{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.55),rgba(124,92,255,.45),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding:60px 0 40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-text{font-size:17px;}
.footer-col h3{font-size:14px;letter-spacing:.08em;color:var(--t1);margin-bottom:16px;}
.footer-col p{font-size:13px;color:var(--t3);max-width:320px;}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:14px;color:var(--t2);}
.footer-col a:hover{color:var(--primary);}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--t3);
}
.footer-bottom .sep{color:var(--line-2);}
/* ---------- responsive ---------- */
@media (max-width:1024px){
  :root{--sec:72px;}
  h1{font-size:36px;}
  h2{font-size:26px;}
  .hero-inner{padding:64px 0 44px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .data-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .subscribe{grid-template-columns:1fr;}
}
@media (max-width:860px){
  .nav-main{
    position:fixed;left:0;right:0;top:65px;bottom:0;
    flex-direction:column;align-items:stretch;gap:6px;
    background:rgba(8,9,12,.98);padding:20px 24px 40px;
    overflow-y:auto;transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .2s var(--ease),transform .2s var(--ease);
    border-top:1px solid var(--line);
  }
  .nav-main.is-open{transform:translateY(0);opacity:1;pointer-events:auto;}
  .nav-link{height:52px;font-size:16px;justify-content:flex-start;padding:0 14px;}
  .nav-link.is-active::before{display:none;}
  .nav-link.is-active::after{left:14px;right:auto;width:24px;bottom:8px;}
  .nav-toggle{display:inline-flex;}
  .nav-actions .btn-primary{display:none;}
}
@media (max-width:520px){
  :root{--sec:56px;}
  .container{padding:0 16px;}
  h1{font-size:28px;line-height:1.3;}
  h2{font-size:22px;}
  h3{font-size:17px;}
  .hero-lead{font-size:15px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;}
  .data-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .post-card{flex-direction:column;}
  .post-thumb{flex:0 0 auto;width:100%;height:auto;aspect-ratio:16/9;}
  .mini-card img{width:56px;height:56px;flex:0 0 56px;}
  .cta-inner h2{font-size:20px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: article */
:root{
  --bg:#08090C;
  --bg-2:#0F1116;
  --surface:#14171E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.18);
  --primary:#2FE3C8;
  --primary-deep:#12B39B;
  --accent:#7C5CFF;
  --hot:#FF5C7A;
  --t1:#EDF1F7;
  --t2:#A8B2C1;
  --t3:#6E7787;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --shadow:inset 0 1px 0 rgba(255,255,255,.04), 0 18px 40px -20px rgba(0,0,0,.85);
  --glow:0 0 0 1px var(--primary), 0 0 24px -6px rgba(47,227,200,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--t1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.005em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:64px 64px;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--primary);text-decoration:none;transition:color .18s var(--ease),opacity .18s var(--ease)}
a:hover{color:#66f2dc}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--t1)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.section{padding:96px 0;position:relative}
.section-line{border-top:1px solid var(--line)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.sec-head h2{font-size:30px;line-height:1.35}
.sec-index{font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:var(--primary);display:block;margin-bottom:12px}
.sec-desc{color:var(--t2);font-size:15px;margin-top:10px;max-width:640px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;cursor:pointer;text-decoration:none;
  transition:transform .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.btn-primary{background:var(--primary);color:#04211C;border-color:var(--primary)}
.btn-primary:hover{background:#4ff0d8;color:#04211C;transform:translateY(-2px);box-shadow:0 0 24px -6px rgba(47,227,200,.6)}
.btn-primary:active{transform:translateY(0)}
.btn-secondary{background:transparent;border-color:var(--line-strong);color:var(--t1)}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary);background:rgba(47,227,200,.1);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--t2)}
.btn-ghost:hover{color:var(--primary)}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 12px;border-radius:999px;font-size:12px;letter-spacing:.06em;
  background:rgba(47,227,200,.12);color:var(--primary);border:1px solid rgba(47,227,200,.28);
  white-space:nowrap;
}
.badge-accent{background:rgba(124,92,255,.14);color:#B7A6FF;border-color:rgba(124,92,255,.32)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,9,12,.9);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.75),rgba(124,92,255,.6),transparent);
}
.nav-inner{display:flex;align-items:center;gap:20px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--t1);font-weight:800;font-size:18px;letter-spacing:.01em;flex:0 0 auto}
.brand:hover{color:var(--t1)}
.brand-mark{
  width:22px;height:22px;border-radius:7px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 16px -3px rgba(47,227,200,.85);
  position:relative;
}
.brand-mark::after{content:"";position:absolute;inset:6px;border-radius:3px;background:rgba(8,9,12,.85)}
.nav-main{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:9px 13px;border-radius:9px;font-size:15px;color:var(--t2);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.05)}
.nav-link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 12px rgba(47,227,200,.9);
  transform:scaleX(0);transform-origin:left center;transition:transform .2s var(--ease);
}
.nav-link.is-active{color:var(--primary)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:8px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  background:transparent;border:1px solid var(--line-strong);color:var(--t1);
  align-items:center;justify-content:center;cursor:pointer;padding:0;
}
.nav-toggle span{position:relative;width:18px;height:2px;background:currentColor;border-radius:2px;display:block}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;transition:transform .2s var(--ease)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- 文章页头 ---------- */
.article-hero{
  position:relative;overflow:hidden;
  padding:52px 0 46px;
  border-bottom:1px solid var(--line);
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,9,12,.92),rgba(8,9,12,.86) 55%,rgba(8,9,12,.96));
}
.article-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:-120px;height:220px;
  background:radial-gradient(60% 100% at 50% 0,rgba(47,227,200,.16),transparent 70%);
}
.hero-inner{position:relative;z-index:2;max-width:860px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:20px}
.crumbs a{color:var(--t2)}
.crumbs a:hover{color:var(--primary)}
.crumbs span{color:var(--t3);opacity:.7}
.crumbs em{font-style:normal;color:var(--primary);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{font-size:40px;line-height:1.32;margin-bottom:20px;max-width:820px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:14px;color:var(--t2)}
.meta-dot{width:4px;height:4px;border-radius:50%;background:var(--t3);display:inline-block}

/* ---------- 正文 ---------- */
.article-section{padding:72px 0 88px}
.article-layout{max-width:820px;margin:0 auto}
.article-body{
  font-size:16.5px;line-height:1.92;color:#D6DDE7;max-width:820px;
}
.article-body>*:first-child{margin-top:0}
.article-body h1{font-size:30px;line-height:1.4;margin:40px 0 16px}
.article-body h2{
  font-size:25px;line-height:1.45;margin:46px 0 16px;padding-left:14px;
  border-left:3px solid var(--primary);color:var(--t1);
}
.article-body h3{font-size:20px;line-height:1.5;margin:32px 0 12px;color:var(--t1)}
.article-body h4{font-size:17px;margin:24px 0 10px;color:var(--t1)}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px;color:#D6DDE7}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:8px 0}
.article-body li::marker{color:var(--primary)}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.article-body strong{color:#FFFFFF;font-weight:700}
.article-body blockquote{
  margin:26px 0;padding:16px 22px;border-left:3px solid var(--accent);
  background:rgba(124,92,255,.09);border-radius:0 12px 12px 0;color:#C6CEDB;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-img);margin:24px auto;height:auto}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13px;color:var(--t3);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line-strong);padding:11px 14px;text-align:left;line-height:1.6}
.article-body th{background:rgba(255,255,255,.035);color:var(--t1);font-weight:700}
.article-body pre{
  margin:26px 0;padding:18px 20px;background:#0B0D12;border:1px solid var(--line);
  border-radius:var(--r-img);overflow:auto;line-height:1.7;
}
.article-body code{font-family:var(--mono);font-size:14px;color:var(--primary);background:rgba(47,227,200,.08);padding:2px 6px;border-radius:6px}
.article-body pre code{background:none;padding:0;color:#CBD5E1}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}

/* ---------- 文末信息 ---------- */
.article-foot{margin-top:56px;padding-top:28px;border-top:1px solid var(--line)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.tag{
  display:inline-flex;align-items:center;min-height:32px;padding:0 14px;border-radius:999px;
  font-size:13px;color:var(--t2);background:var(--surface);border:1px solid var(--line);
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.tag:hover{color:var(--primary);border-color:rgba(47,227,200,.5);transform:translateY(-2px)}
.foot-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;justify-content:space-between;
  padding:18px 20px;border-radius:var(--r-card);background:var(--bg-2);border:1px solid var(--line);
}
.foot-bar .meta{font-size:14px;color:var(--t2)}

/* ---------- 空态 ---------- */
.empty-state{
  border:1px dashed var(--line-strong);border-radius:var(--r-card);
  background:rgba(255,255,255,.015);padding:56px 28px;text-align:center;
}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--t2);font-size:15px;margin-bottom:22px}

/* ---------- 相关推荐 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(47,227,200,.55);box-shadow:var(--glow)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0B0D12}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s var(--ease)}
.card:hover .card-media img{transform:scale(1.04)}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(8,9,12,.75))}
.card-media .badge{position:absolute;top:12px;left:12px;z-index:2}
.card-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body h3 a{color:var(--t1)}
.card-body h3 a:hover{color:var(--primary)}
.card-text{font-size:14.5px;color:var(--t2);line-height:1.72;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--t3)}
.arrow{color:var(--primary);transition:transform .18s var(--ease)}
.card:hover .arrow{transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.faq-item:hover{border-color:rgba(47,227,200,.4)}
.faq-item[open]{border-color:rgba(47,227,200,.5);box-shadow:var(--glow)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;cursor:pointer;font-size:16px;font-weight:600;color:var(--t1);
  list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-family:var(--mono);font-size:20px;color:var(--primary);flex:0 0 auto;
  transition:transform .2s var(--ease);
}
.faq-item[open] summary::after{content:"−";transform:rotate(180deg)}
.faq-answer{padding:0 20px 20px;color:var(--t2);font-size:15px;line-height:1.85}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  padding:36px 34px;border-radius:18px;
  background:linear-gradient(120deg,rgba(47,227,200,.12),rgba(124,92,255,.14)),var(--bg-2);
  border:1px solid rgba(47,227,200,.28);
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 12px);
  opacity:.5;animation:scan 8s linear infinite;
}
@keyframes scan{from{transform:translateX(0)}to{transform:translateX(12px)}}
.cta-band h2{font-size:24px;line-height:1.4;margin-bottom:8px}
.cta-band p{color:var(--t2);font-size:15px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:2}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-2);position:relative;padding-top:64px}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.6),rgba(124,92,255,.5),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;margin-bottom:14px}
.footer-col h3{font-size:15px;margin-bottom:16px;color:var(--t1)}
.footer-col p{font-size:14px;color:var(--t2);line-height:1.85}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:var(--t2)}
.footer-col ul a:hover{color:var(--primary)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding:20px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--t3);
}
.footer-bottom .sep{opacity:.5}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .section{padding:72px 0}
  .article-title{font-size:34px}
  .article-section{padding:56px 0 72px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .nav-toggle{display:inline-flex}
  .nav-main{
    position:fixed;top:64px;left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;gap:2px;
    margin:0;padding:20px 24px 40px;
    background:rgba(9,10,14,.98);
    border-bottom:1px solid var(--line);
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .2s var(--ease),transform .2s var(--ease);
    overflow-y:auto;
  }
  .nav-main.is-open{transform:none;opacity:1;pointer-events:auto}
  .nav-link{font-size:18px;padding:16px 8px;border-bottom:1px solid rgba(255,255,255,.06);border-radius:0}
  .nav-link::after{left:8px;right:auto;width:22px;bottom:8px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .article-hero{padding:36px 0 32px}
  .article-title{font-size:28px}
  .article-body{font-size:16px;line-height:1.88}
  .article-body h2{font-size:22px}
  .article-body h3{font-size:18px}
  .sec-head{flex-direction:column;align-items:flex-start;margin-bottom:28px}
  .sec-head h2{font-size:24px}
  .cta-band{padding:26px 22px}
  .foot-bar{flex-direction:column;align-items:flex-start}
}
@media (max-width:560px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .brand{font-size:17px}
  .nav-actions .btn-sm{display:none}
  .card-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .article-title{font-size:24px;line-height:1.38}
  .article-meta{font-size:13px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
}

/* roulang page: category1 */
:root{
  --bg:#08090C;
  --bg-2:#0F1116;
  --surface:#14171E;
  --surface-2:#1A1E27;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --primary:#2FE3C8;
  --primary-deep:#12B39B;
  --accent:#7C5CFF;
  --hot:#FF5C7A;
  --t1:#EDF1F7;
  --t2:#A8B2C1;
  --t3:#6E7787;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --shadow:inset 0 1px 0 rgba(255,255,255,.04), 0 18px 40px -20px rgba(0,0,0,.8);
  --glow:0 0 0 1px var(--primary), 0 0 24px -6px rgba(47,227,200,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sp-section:96px;
}

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

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size:56px 56px;
  color:var(--t1);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.9;
  font-weight:400;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:var(--primary);text-decoration:none;transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);}
a:hover{color:#6DF3DE;}
p{margin:0 0 16px;}
ul,ol{margin:0 0 16px;padding-left:20px;}
li{margin-bottom:8px;color:var(--t2);}
h1,h2,h3,h4{margin:0;color:var(--t1);font-weight:750;letter-spacing:-.01em;line-height:1.3;}
h1{font-size:44px;line-height:56px;}
h2{font-size:30px;line-height:40px;}
h3{font-size:20px;line-height:30px;}
button,input,select,textarea{font:inherit;color:inherit;outline:none;}
button{cursor:pointer;border:0;background:none;padding:0;}
::selection{background:rgba(47,227,200,.28);color:#fff;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
@media (min-width:1440px){
  .container{max-width:1280px;}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  border:1px solid transparent;
  transition:transform .18s var(--ease),background-color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--primary);
  color:#05231E;
  box-shadow:0 12px 30px -16px rgba(47,227,200,.9);
}
.btn-primary:hover{background:#54EBD5;color:#05231E;transform:translateY(-2px);}
.btn-secondary{
  background:transparent;
  color:var(--t1);
  border-color:var(--line-strong);
}
.btn-secondary:hover{
  background:rgba(47,227,200,.12);
  border-color:var(--primary);
  color:var(--t1);
  transform:translateY(-2px);
}
.btn-ghost{
  background:transparent;
  color:var(--t2);
  border-color:transparent;
  padding-left:6px;
  padding-right:6px;
}
.btn-ghost:hover{color:var(--primary);}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px;}
.btn:active{transform:translateY(0);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  background:rgba(47,227,200,.12);
  border:1px solid rgba(47,227,200,.32);
  color:var(--primary);
  font-size:12px;
  line-height:18px;
  letter-spacing:.06em;
}
.badge-purple{
  background:rgba(124,92,255,.14);
  border-color:rgba(124,92,255,.36);
  color:#B4A2FF;
}
.badge-hot{
  background:rgba(255,92,122,.13);
  border-color:rgba(255,92,122,.34);
  color:#FF8CA1;
}
.tag{
  display:inline-block;
  padding:5px 12px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--t2);
  font-size:12px;
  line-height:18px;
  letter-spacing:.06em;
}
.tag + .tag{margin-left:8px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(8,9,12,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.65),rgba(124,92,255,.5),transparent);
  pointer-events:none;
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:64px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--t1);
  font-weight:800;
  letter-spacing:.02em;
  flex:0 0 auto;
}
.brand:hover{color:var(--t1);}
.brand-mark{
  width:22px;height:22px;
  border-radius:7px;
  background:linear-gradient(135deg,var(--primary),var(--accent) 70%);
  box-shadow:0 0 18px -4px rgba(47,227,200,.85);
  position:relative;
  flex:0 0 auto;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:6px;
  border-radius:3px;
  background:rgba(8,9,12,.85);
}
.brand-text{font-size:17px;}
.nav-main{
  display:flex;
  align-items:center;
  gap:6px;
  flex:1 1 auto;
  justify-content:center;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  border-radius:var(--r-btn);
  color:var(--t2);
  font-size:14.5px;
  font-weight:500;
  transition:color .18s var(--ease),background-color .18s var(--ease);
  white-space:nowrap;
}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.05);}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:6px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  opacity:0;
  transform:scaleX(.4);
  transition:opacity .18s var(--ease),transform .18s var(--ease);
}
.nav-link.is-active{color:var(--primary);font-weight:700;}
.nav-link.is-active::after{opacity:1;transform:scaleX(1);box-shadow:0 0 14px rgba(47,227,200,.7);}
.nav-link.is-active::before{
  content:"";
  position:absolute;
  left:6px;top:50%;
  width:4px;height:4px;
  margin-top:-2px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 10px var(--primary);
}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:var(--r-btn);
  border:1px solid var(--line);
  align-items:center;
  justify-content:center;
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--t1);
  transition:transform .18s var(--ease),opacity .18s var(--ease);
}
.nav-toggle span::before{transform:translateY(-6px);}
.nav-toggle span::after{transform:translateY(4px);}
.nav-toggle.is-active span{background:transparent;}
.nav-toggle.is-active span::before{transform:translateY(0) rotate(45deg);}
.nav-toggle.is-active span::after{transform:translateY(-2px) rotate(-45deg);}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(720px 320px at 12% 0%, rgba(47,227,200,.10), transparent 70%),
    radial-gradient(620px 300px at 92% 12%, rgba(124,92,255,.14), transparent 72%),
    var(--bg-2);
}
.page-head::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  opacity:.16;
  filter:saturate(.8);
  pointer-events:none;
}
.page-head > .container{position:relative;z-index:2;}
.page-head-inner{padding:56px 0 56px;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--t3);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--t2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--t3);opacity:.6;}
.breadcrumb .current{color:var(--t1);}
.head-grid{display:flex;flex-wrap:wrap;align-items:center;gap:40px;}
.head-copy{flex:1 1 520px;min-width:280px;}
.head-visual{flex:0 1 420px;min-width:260px;}
.head-visual img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--primary);
  margin-bottom:16px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.eyebrow::before{
  content:"";
  width:28px;height:1px;
  background:linear-gradient(90deg,var(--primary),transparent);
}
.page-head h1{margin-bottom:18px;}
.page-head h1 em{
  font-style:normal;
  color:var(--primary);
  text-shadow:0 0 26px rgba(47,227,200,.4);
}
.head-lead{
  max-width:640px;
  font-size:17px;
  line-height:1.85;
  color:var(--t2);
  margin-bottom:26px;
}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
.head-meta{
  margin-top:22px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  font-size:13px;
  color:var(--t3);
}
.head-meta span{display:inline-flex;align-items:center;gap:8px;}
.head-meta i{color:var(--primary);font-size:12px;}

/* ---------- 数据条 ---------- */
.stat-bar{
  border-top:1px solid var(--line);
  background:rgba(15,17,22,.75);
}
.stat-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
}
.stat-item{
  padding:26px 20px;
  border-right:1px solid var(--line);
}
.stat-item:last-child{border-right:0;}
.stat-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:26px;
  font-weight:700;
  color:var(--t1);
  line-height:1.2;
}
.stat-num b{color:var(--primary);font-weight:700;}
.stat-label{font-size:13px;color:var(--t3);margin-top:6px;letter-spacing:.04em;}

/* ---------- 分类切换条 ---------- */
.cat-switch{
  border-bottom:1px solid var(--line);
  background:rgba(8,9,12,.6);
  padding:14px 0;
  overflow-x:auto;
}
.cat-switch-inner{
  display:flex;
  gap:10px;
  align-items:center;
  min-width:max-content;
}
.cat-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:40px;
  padding:0 18px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--t2);
  font-size:14px;
  font-weight:500;
  transition:all .18s var(--ease);
  white-space:nowrap;
}
.cat-chip:hover{color:var(--t1);border-color:var(--line-strong);transform:translateY(-2px);}
.cat-chip.is-active{
  color:var(--primary);
  border-color:rgba(47,227,200,.55);
  background:rgba(47,227,200,.10);
  box-shadow:0 0 22px -6px rgba(47,227,200,.6);
  font-weight:700;
}
.cat-switch-label{
  font-size:12px;
  letter-spacing:.16em;
  color:var(--t3);
  padding-right:6px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ---------- 主体双栏 ---------- */
.section{padding:var(--sp-section) 0;}
.section-tight{padding:64px 0;}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head h2{margin-bottom:14px;}
.section-head p{color:var(--t2);font-size:16px;margin:0;}
.section-tag{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--primary);
  display:block;
  margin-bottom:12px;
}

.main-grid{padding-top:72px;}
.toc-col{position:relative;}
.toc{
  position:sticky;
  top:92px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(26,30,39,.9),rgba(20,23,30,.9));
  box-shadow:var(--shadow);
  padding:24px 22px;
}
.toc h2{
  font-size:13px;
  letter-spacing:.16em;
  color:var(--t3);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-weight:600;
  margin-bottom:16px;
}
.toc-list{list-style:none;padding:0;margin:0;}
.toc-list li{margin:0;}
.toc-list a{
  display:flex;
  gap:12px;
  align-items:baseline;
  padding:9px 10px;
  border-radius:8px;
  color:var(--t2);
  font-size:14px;
  line-height:1.6;
  border-left:2px solid transparent;
  transition:all .18s var(--ease);
}
.toc-list a span{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12px;
  color:var(--t3);
}
.toc-list a:hover{
  background:rgba(47,227,200,.08);
  color:var(--t1);
  border-left-color:var(--primary);
}
.toc-list a:hover span{color:var(--primary);}
.toc-note{
  margin-top:20px;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-size:13px;
  line-height:1.75;
  color:var(--t3);
}

.content-col{max-width:820px;}
.doc-block{margin-bottom:56px;scroll-margin-top:96px;}
.doc-block:last-child{margin-bottom:0;}
.doc-block h2{
  display:flex;
  align-items:baseline;
  gap:14px;
  margin-bottom:18px;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
}
.doc-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;
  color:var(--primary);
  letter-spacing:.08em;
  flex:0 0 auto;
}
.doc-block p{color:var(--t2);font-size:16px;line-height:1.95;}
.doc-block strong{color:var(--t1);font-weight:650;}

.plain-list{list-style:none;padding:0;margin:0;}
.plain-list li{
  position:relative;
  padding:12px 0 12px 22px;
  border-bottom:1px dashed var(--line);
  color:var(--t2);
  font-size:15.5px;
  line-height:1.85;
}
.plain-list li:last-child{border-bottom:0;}
.plain-list li::before{
  content:"";
  position:absolute;
  left:0;top:22px;
  width:8px;height:8px;
  border-radius:2px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
}
.plain-list b{color:var(--t1);font-weight:650;}

.part-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
  margin-top:8px;
}
.part-card{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:22px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--surface);
  box-shadow:var(--shadow);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  color:inherit;
}
.part-card:hover{
  transform:translateY(-2px);
  border-color:rgba(47,227,200,.45);
  box-shadow:var(--glow);
  color:inherit;
}
.part-card .pc-icon{
  width:36px;height:36px;
  border-radius:10px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background:rgba(47,227,200,.12);
  color:var(--primary);
  font-size:15px;
}
.part-card h3{font-size:17px;margin:0;}
.part-card p{font-size:14px;color:var(--t2);margin:0;line-height:1.75;}
.part-card .pc-more{
  margin-top:auto;
  font-size:13px;
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.part-card:hover .pc-more i{transform:translateX(3px);}
.pc-more i{transition:transform .18s var(--ease);}

.steps{list-style:none;padding:0;margin:0;position:relative;}
.steps::before{
  content:"";
  position:absolute;
  left:15px;top:12px;bottom:12px;
  width:1px;
  background:linear-gradient(180deg,rgba(47,227,200,.6),rgba(124,92,255,.35),transparent);
}
.steps li{
  position:relative;
  padding:0 0 26px 52px;
  color:var(--t2);
  font-size:15.5px;
  line-height:1.85;
}
.steps li:last-child{padding-bottom:0;}
.steps li b{display:block;color:var(--t1);font-weight:650;margin-bottom:4px;font-size:16px;}
.steps li::before{
  content:attr(data-step);
  position:absolute;
  left:0;top:2px;
  width:31px;height:31px;
  border-radius:9px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--bg-2);
  border:1px solid rgba(47,227,200,.4);
  color:var(--primary);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12px;
  box-shadow:0 0 16px -6px rgba(47,227,200,.8);
}

.warn-list{list-style:none;padding:0;margin:0;}
.warn-list li{
  position:relative;
  padding:18px 20px 18px 52px;
  margin-bottom:12px;
  border:1px solid var(--line);
  border-left:2px solid var(--hot);
  border-radius:10px;
  background:rgba(255,92,122,.05);
  color:var(--t2);
  font-size:15px;
  line-height:1.8;
}
.warn-list li:last-child{margin-bottom:0;}
.warn-list li::before{
  content:"!";
  position:absolute;
  left:18px;top:20px;
  width:20px;height:20px;
  border-radius:50%;
  background:rgba(255,92,122,.16);
  color:#FF8CA1;
  font-size:12px;
  font-weight:700;
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.warn-list b{color:var(--t1);font-weight:650;}

.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--surface);
  box-shadow:var(--shadow);
}
.table-scroll{overflow-x:auto;}
table.spec{
  width:100%;
  border-collapse:collapse;
  min-width:560px;
  font-size:14.5px;
}
table.spec th,table.spec td{
  padding:14px 18px;
  text-align:left;
  border-bottom:1px solid var(--line);
  border-right:1px solid var(--line);
  color:var(--t2);
  line-height:1.7;
}
table.spec th{
  background:rgba(255,255,255,.03);
  color:var(--t1);
  font-weight:650;
  font-size:13.5px;
  letter-spacing:.04em;
}
table.spec tr:last-child td{border-bottom:0;}
table.spec th:last-child,table.spec td:last-child{border-right:0;}
table.spec td strong{color:var(--t1);font-weight:650;}

.note-card{
  display:flex;
  gap:18px;
  align-items:flex-start;
  padding:22px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:linear-gradient(120deg,rgba(124,92,255,.10),rgba(20,23,30,.9));
  margin-top:22px;
}
.note-card img{
  width:120px;
  flex:0 0 120px;
  aspect-ratio:1/1;
  object-fit:cover;
}
.note-card h3{font-size:16px;margin-bottom:6px;}
.note-card p{font-size:14px;color:var(--t2);margin:0;line-height:1.8;}

/* ---------- FAQ ---------- */
.faq-list{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--surface);
  box-shadow:var(--shadow);
}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:56px;
  padding:16px 24px;
  text-align:left;
  color:var(--t1);
  font-size:16.5px;
  font-weight:600;
  transition:background-color .18s var(--ease),color .18s var(--ease);
}
.faq-q:hover{background:rgba(47,227,200,.06);color:var(--primary);}
.faq-icon{
  position:relative;
  width:18px;height:18px;
  flex:0 0 18px;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--primary);
  border-radius:2px;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.faq-icon::before{left:0;top:8px;width:18px;height:2px;}
.faq-icon::after{left:8px;top:0;width:2px;height:18px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-item.is-open .faq-q{color:var(--primary);background:rgba(47,227,200,.05);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s var(--ease);
}
.faq-a-inner{
  padding:0 24px 22px;
  color:var(--t2);
  font-size:15px;
  line-height:1.9;
}
.faq-a-inner p{margin:0;}

/* ---------- CTA 条带 ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(600px 260px at 20% 20%, rgba(47,227,200,.14), transparent 70%),
    radial-gradient(520px 260px at 85% 80%, rgba(124,92,255,.16), transparent 72%),
    var(--bg-2);
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(90deg, rgba(255,255,255,.05) 0 1px, transparent 1px 4px);
  opacity:.16;
  animation:scan 9s linear infinite;
  pointer-events:none;
}
@keyframes scan{
  from{transform:translateX(0);}
  to{transform:translateX(4px);}
}
.cta-inner{
  position:relative;
  z-index:2;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  padding:56px 0;
}
.cta-copy{flex:1 1 460px;min-width:260px;}
.cta-copy h2{font-size:26px;margin-bottom:12px;}
.cta-copy p{color:var(--t2);margin:0;font-size:15.5px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-2);
  position:relative;
  padding-top:64px;
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;right:0;top:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.55),rgba(124,92,255,.45),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:44px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
.footer-brand .brand-text{font-size:17px;font-weight:800;}
.footer-col p{color:var(--t3);font-size:14px;line-height:1.85;margin:0;}
.footer-col h3{
  font-size:13px;
  letter-spacing:.14em;
  color:var(--t3);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-weight:600;
  margin-bottom:16px;
}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:10px;}
.footer-col a{
  color:var(--t2);
  font-size:14px;
  transition:color .18s var(--ease);
}
.footer-col a:hover{color:var(--primary);text-shadow:0 0 14px rgba(47,227,200,.45);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--t3);
}
.footer-bottom .sep{opacity:.4;}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:28px;}
}
@media (max-width:1023px){
  :root{--sp-section:72px;}
  h1{font-size:36px;line-height:46px;}
  h2{font-size:26px;line-height:35px;}
  .nav-main{
    position:fixed;
    top:57px;
    left:0;right:0;bottom:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:6px;
    padding:24px;
    background:rgba(8,9,12,.98);
    border-top:1px solid var(--line);
    overflow-y:auto;
    z-index:70;
  }
  .nav-main.is-open{display:flex;}
  .nav-link{
    min-height:56px;
    padding:0 16px;
    font-size:17px;
    border-radius:12px;
    border:1px solid transparent;
  }
  .nav-link.is-active{
    border-color:rgba(47,227,200,.4);
    background:rgba(47,227,200,.08);
  }
  .nav-link::after{display:none;}
  .nav-link.is-active::before{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-inner{min-height:56px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(2){border-right:0;}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line);}
  .toc{position:static;top:auto;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .page-head-inner{padding:40px 0 44px;}
  .head-visual{flex:1 1 100%;}
  .part-grid{grid-template-columns:1fr;}
}
@media (max-width:639px){
  :root{--sp-section:56px;}
  body{font-size:15px;}
  .container{padding:0 16px;}
  h1{font-size:30px;line-height:38px;}
  h2{font-size:24px;line-height:32px;}
  h3{font-size:18px;line-height:28px;}
  .page-head h1{margin-bottom:14px;}
  .head-lead{font-size:15.5px;}
  .head-actions .btn{width:100%;}
  .stat-grid{grid-template-columns:1fr;}
  .stat-item{border-right:0;border-bottom:1px solid var(--line);}
  .stat-item:last-child{border-bottom:0;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-inner{padding:44px 0;}
  .cta-actions .btn{width:100%;}
  .doc-block h2{flex-wrap:wrap;}
  .faq-q{padding:14px 18px;font-size:15.5px;}
  .faq-a-inner{padding:0 18px 18px;}
  .note-card{flex-direction:column;}
  .note-card img{width:100%;flex:1 1 auto;aspect-ratio:16/9;}
  .main-grid{padding-top:48px;}
}

/* roulang page: category2 */
:root{
  --bg:#08090C;
  --bg-2:#0F1116;
  --surface:#14171E;
  --surface-2:#181C24;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --primary:#2FE3C8;
  --primary-deep:#12B39B;
  --accent:#7C5CFF;
  --hot:#FF5C7A;
  --t1:#EDF1F7;
  --t2:#A8B2C1;
  --t3:#6E7787;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --shadow:0 1px 0 rgba(255,255,255,.04) inset, 0 18px 40px -20px rgba(0,0,0,.8);
  --ease:180ms cubic-bezier(.2,.7,.3,1);
  --gap-1:8px;
  --gap-2:16px;
  --gap-3:24px;
  --gap-4:32px;
  --gap-5:48px;
  --gap-6:72px;
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--t1);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size:64px 64px;
  background-position:center top;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease);}
a:hover,a:focus{color:#6BF0DA;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--t1);line-height:1.3;}
p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
@media (min-width:1440px){
  .container{max-width:1280px;}
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(8,9,12,.9);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(47,227,200,.12), 0 20px 40px -30px rgba(0,0,0,.9);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:var(--gap-3);
  min-height:64px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--t1);
  font-weight:800;
  font-size:19px;
  letter-spacing:-.01em;
  flex:0 0 auto;
}
.brand:hover{color:var(--t1);}
.brand-mark{
  width:22px;
  height:22px;
  border-radius:7px;
  background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%);
  box-shadow:0 0 0 1px rgba(255,255,255,.14), 0 0 18px -4px rgba(47,227,200,.7);
  position:relative;
  flex:0 0 auto;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:6px;
  border-radius:3px;
  background:rgba(8,9,12,.85);
}
.brand-text{white-space:nowrap;}
.nav-main{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 12px;
  color:var(--t2);
  font-size:15px;
  font-weight:600;
  border-radius:8px;
  white-space:nowrap;
}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.04);}
.nav-link.is-active{color:var(--primary);}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:6px;
  height:2px;
  border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 12px 1px rgba(47,227,200,.7);
}
.nav-link.is-active::before{
  content:"";
  position:absolute;
  top:9px;
  right:6px;
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 8px 1px rgba(47,227,200,.8);
}
.nav-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--line-strong);
  border-radius:10px;
  background:rgba(255,255,255,.03);
  cursor:pointer;
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;
  left:50%;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--t1);
  transform:translateX(-50%);
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none;}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:700;
  border:1px solid transparent;
  cursor:pointer;
  transition:background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
  text-align:center;
}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px;}
.btn-primary{
  background:var(--primary);
  color:#05201C;
  box-shadow:0 10px 26px -14px rgba(47,227,200,.85);
}
.btn-primary:hover,.btn-primary:focus{background:#57EDD6;color:#05201C;transform:translateY(-2px);}
.btn-primary:active{background:var(--primary-deep);color:#041815;transform:translateY(0);}
.btn-ghost{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--t1);
}
.btn-ghost:hover,.btn-ghost:focus{
  border-color:var(--primary);
  background:rgba(47,227,200,.12);
  color:var(--t1);
  transform:translateY(-2px);
}
.btn-ghost:active{background:rgba(47,227,200,.06);transform:translateY(0);}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.45;cursor:not-allowed;transform:none;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 11px;
  border-radius:999px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.06em;
  border:1px solid rgba(47,227,200,.36);
  background:rgba(47,227,200,.1);
  color:var(--primary);
  white-space:nowrap;
  line-height:1.5;
}
.badge-accent{border-color:rgba(124,92,255,.4);background:rgba(124,92,255,.12);color:#BBA8FF;}
.badge-hot{border-color:rgba(255,92,122,.4);background:rgba(255,92,122,.12);color:#FF92A8;}
.badge-mute{border-color:var(--line-strong);background:rgba(255,255,255,.05);color:var(--t2);}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--t3);
  margin-bottom:22px;
}
.breadcrumb a{color:var(--t2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--t3);}
.breadcrumb .now{color:var(--t1);font-weight:600;}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;
  padding:56px 0 var(--gap-6);
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 380px at 82% -30%, rgba(47,227,200,.13), transparent 62%),
    radial-gradient(700px 320px at 6% 110%, rgba(124,92,255,.13), transparent 60%),
    linear-gradient(180deg,#0B0D12 0%, #08090C 100%);
  overflow:hidden;
}
.page-head::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.55),transparent);
}
.head-grid{
  display:grid;
  grid-template-columns:1.08fr .92fr;
  gap:var(--gap-5);
  align-items:center;
}
.head-label{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--t3);
  text-transform:uppercase;
  margin-bottom:16px;
}
.head-label i{
  display:block;
  width:26px;
  height:1px;
  background:var(--primary);
  box-shadow:0 0 10px 1px rgba(47,227,200,.7);
}
.page-head h1{
  font-size:44px;
  line-height:1.22;
  margin-bottom:18px;
}
.page-head h1 em{
  font-style:normal;
  color:var(--primary);
}
.head-lead{
  font-size:17px;
  color:var(--t2);
  max-width:56ch;
  margin-bottom:26px;
}
.head-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:28px;
}
.head-cta{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.head-media{
  position:relative;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  aspect-ratio:16 / 11;
  background:var(--surface);
}
.head-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 420ms cubic-bezier(.2,.7,.3,1);
}
.head-media:hover img{transform:scale(1.04);}
.head-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(8,9,12,.12) 0%, rgba(8,9,12,.72) 100%);
}
.head-media-caption{
  position:absolute;
  left:20px;
  right:20px;
  bottom:18px;
  z-index:2;
  font-size:13px;
  color:#DDE5EE;
  letter-spacing:.02em;
}

/* ---------- 数据条 ---------- */
.stats-bar{
  border-bottom:1px solid var(--line);
  background:var(--bg-2);
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:var(--line);
  margin:0 -24px;
  border-left:1px solid var(--line);
  border-right:1px solid var(--line);
}
.stat{
  background:var(--bg-2);
  padding:28px 24px;
  transition:background-color var(--ease);
}
.stat:hover{background:var(--surface);}
.stat-num{
  font-size:30px;
  font-weight:800;
  color:var(--primary);
  letter-spacing:-.02em;
  line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.stat-label{
  margin-top:6px;
  font-size:14px;
  color:var(--t2);
}
.stat-note{
  margin-top:4px;
  font-size:12px;
  color:var(--t3);
  letter-spacing:.06em;
}

/* ---------- 板块通用 ---------- */
.section{padding:var(--sec) 0;position:relative;}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{
  max-width:720px;
  margin-bottom:var(--gap-5);
}
.sec-index{
  display:inline-block;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--t3);
  margin-bottom:12px;
  border-left:2px solid var(--primary);
  padding-left:10px;
  line-height:1.4;
}
.section h2{
  font-size:30px;
  line-height:1.32;
  margin-bottom:14px;
}
.sec-desc{
  font-size:16px;
  color:var(--t2);
  max-width:62ch;
}

/* ---------- 时间线 ---------- */
.timeline{
  position:relative;
  padding-left:64px;
  max-width:900px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:21px;
  top:10px;
  bottom:10px;
  width:2px;
  border-radius:2px;
  background:linear-gradient(180deg, rgba(47,227,200,.85) 0%, rgba(124,92,255,.55) 55%, rgba(47,227,200,.08) 100%);
}
.tl-item{
  position:relative;
  margin-bottom:var(--gap-4);
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px 28px;
  box-shadow:var(--shadow);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.tl-item:last-child{margin-bottom:0;}
.tl-item::before{
  content:"";
  position:absolute;
  left:-50px;
  top:32px;
  width:12px;
  height:12px;
  border-radius:50%;
  background:var(--bg);
  border:2px solid var(--primary);
  box-shadow:0 0 14px 1px rgba(47,227,200,.55);
  transition:box-shadow var(--ease),background-color var(--ease);
}
.tl-item:hover{
  border-color:rgba(47,227,200,.4);
  box-shadow:var(--shadow), 0 0 0 1px rgba(47,227,200,.35), 0 0 28px -8px rgba(47,227,200,.45);
  transform:translateY(-2px);
}
.tl-item:hover::before{background:var(--primary);box-shadow:0 0 18px 3px rgba(47,227,200,.8);}
.tl-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-bottom:12px;
}
.tl-num{
  font-size:13px;
  font-weight:800;
  letter-spacing:.14em;
  color:var(--primary);
  font-variant-numeric:tabular-nums;
}
.tl-item h3{
  font-size:20px;
  margin-bottom:10px;
}
.tl-item p{
  color:var(--t2);
  font-size:15.5px;
  max-width:72ch;
}
.tl-points{
  margin-top:16px;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:10px 24px;
}
.tl-points li{
  position:relative;
  padding-left:18px;
  font-size:14.5px;
  color:var(--t2);
}
.tl-points li::before{
  content:"";
  position:absolute;
  left:0;
  top:12px;
  width:6px;
  height:6px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 8px -1px rgba(124,92,255,.9);
}

/* ---------- 能力清单 ---------- */
.cap-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:var(--gap-3);
}
.cap-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:30px;
  box-shadow:var(--shadow);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.cap-card:hover{
  border-color:rgba(124,92,255,.42);
  box-shadow:var(--shadow), 0 0 26px -10px rgba(124,92,255,.6);
}
.cap-card h3{
  font-size:20px;
  margin-bottom:8px;
}
.cap-card .cap-sub{
  font-size:14px;
  color:var(--t3);
  margin-bottom:20px;
}
.cap-list li{
  display:flex;
  gap:12px;
  padding:13px 0;
  border-bottom:1px dashed rgba(255,255,255,.08);
  font-size:15px;
  color:var(--t2);
}
.cap-list li:last-child{border-bottom:0;}
.cap-list .k{
  flex:0 0 auto;
  width:22px;
  height:22px;
  margin-top:7px;
  border-radius:6px;
  border:1px solid rgba(47,227,200,.4);
  color:var(--primary);
  font-size:11px;
  font-weight:800;
  display:flex;
  align-items:center;
  justify-content:center;
  line-height:1;
}

/* ---------- 分类切换条 ---------- */
.switch-bar{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:14px;
}
.switch-item{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:22px 20px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--t2);
  box-shadow:var(--shadow);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease),color var(--ease);
}
.switch-item .sw-k{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--t3);
}
.switch-item .sw-t{
  font-size:16px;
  font-weight:700;
  color:var(--t1);
}
.switch-item:hover{
  transform:translateY(-2px);
  border-color:rgba(47,227,200,.45);
  color:var(--t1);
  box-shadow:var(--shadow), 0 0 24px -8px rgba(47,227,200,.55);
}
.switch-item.is-current{
  border-color:rgba(47,227,200,.7);
  background:linear-gradient(180deg, rgba(47,227,200,.14), rgba(47,227,200,.04));
  box-shadow:0 0 0 1px rgba(47,227,200,.5), 0 0 30px -8px rgba(47,227,200,.7);
}
.switch-item.is-current .sw-t{color:var(--primary);}
.switch-item.is-current .sw-k{color:var(--primary);}

/* ---------- FAQ ---------- */
.faq-list{
  max-width:860px;
  border-top:1px solid var(--line);
}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:56px;
  padding:18px 4px;
  background:none;
  border:0;
  text-align:left;
  color:var(--t1);
  font-size:17px;
  font-weight:700;
  cursor:pointer;
  transition:color var(--ease);
}
.faq-q:hover{color:var(--primary);}
.faq-icon{
  flex:0 0 auto;
  width:26px;
  height:26px;
  border-radius:8px;
  border:1px solid var(--line-strong);
  position:relative;
  transition:border-color var(--ease),transform var(--ease),background-color var(--ease);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  width:11px;
  height:1.5px;
  border-radius:2px;
  background:var(--t1);
  transform:translate(-50%,-50%);
  transition:transform var(--ease),background-color var(--ease),opacity var(--ease);
}
.faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);}
.faq-item.is-open .faq-icon{border-color:rgba(47,227,200,.6);background:rgba(47,227,200,.1);transform:rotate(180deg);}
.faq-item.is-open .faq-icon::before{background:var(--primary);}
.faq-item.is-open .faq-icon::after{opacity:0;}
.faq-a{
  overflow:hidden;
  max-height:0;
  transition:max-height 260ms cubic-bezier(.2,.7,.3,1);
}
.faq-a p{
  padding:0 4px 22px;
  color:var(--t2);
  font-size:15.5px;
  max-width:74ch;
}

/* ---------- CTA + 表单 ---------- */
.cta-band{
  position:relative;
  border:1px solid rgba(47,227,200,.24);
  border-radius:var(--r-card);
  background:
    radial-gradient(600px 240px at 88% -40%, rgba(47,227,200,.16), transparent 62%),
    radial-gradient(520px 240px at 0% 120%, rgba(124,92,255,.16), transparent 60%),
    var(--surface);
  padding:44px;
  overflow:hidden;
  box-shadow:var(--shadow);
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:repeating-linear-gradient(180deg, rgba(255,255,255,.035) 0px, rgba(255,255,255,.035) 1px, transparent 1px, transparent 5px);
  opacity:.35;
  pointer-events:none;
  animation:scan 9s linear infinite;
}
@keyframes scan{
  0%{background-position-y:0;}
  100%{background-position-y:120px;}
}
.cta-inner{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:var(--gap-5);
  align-items:center;
}
.cta-inner h2{font-size:28px;margin-bottom:12px;}
.cta-inner p{color:var(--t2);font-size:15.5px;max-width:52ch;}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:22px;
}
.subscribe-form{
  background:rgba(8,9,12,.55);
  border:1px solid var(--line-strong);
  border-radius:var(--r-card);
  padding:24px;
}
.subscribe-form label{
  display:block;
  font-size:13px;
  color:var(--t2);
  margin-bottom:8px;
  letter-spacing:.04em;
}
.subscribe-form .field-row{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}
.subscribe-form input[type="email"]{
  flex:1 1 200px;
  min-height:46px;
  padding:0 14px;
  background:var(--bg);
  border:1px solid var(--line-strong);
  border-radius:var(--r-btn);
  color:var(--t1);
  font-size:15px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.subscribe-form input[type="email"]::placeholder{color:var(--t3);}
.subscribe-form input[type="email"]:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(47,227,200,.18);
}
.form-hint{
  margin-top:12px;
  font-size:13px;
  color:var(--t3);
}
.form-error{
  margin-top:10px;
  font-size:13px;
  color:var(--hot);
  display:none;
}
.form-error.is-shown{display:block;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  border-top:1px solid var(--line);
  background:var(--bg-2);
  padding:64px 0 28px;
  margin-top:0;
}
.site-footer::before{
  content:"";
  position:absolute;
  left:0;right:0;top:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.6),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:var(--gap-4);
  padding-bottom:40px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:800;
  color:var(--t1);
  margin-bottom:14px;
}
.footer-col p{
  color:var(--t2);
  font-size:14.5px;
  max-width:38ch;
}
.footer-col h3{
  font-size:14px;
  letter-spacing:.08em;
  color:var(--t1);
  margin-bottom:16px;
  font-weight:700;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{
  color:var(--t2);
  font-size:14.5px;
}
.footer-col ul a:hover{color:var(--primary);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding-top:22px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--t3);
}
.footer-bottom .sep{color:rgba(255,255,255,.2);}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .nav-link{padding:0 10px;font-size:14.5px;}
}
@media (max-width:1024px){
  :root{--sec:72px;}
  .nav-toggle{display:block;}
  .nav-main{
    position:fixed;
    left:0;right:0;
    top:64px;
    bottom:0;
    margin-left:0;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:24px;
    background:rgba(8,9,12,.98);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    border-top:1px solid var(--line);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
  }
  .nav-main.is-open{opacity:1;visibility:visible;transform:translateY(0);}
  .nav-main .nav-link{
    min-height:52px;
    font-size:17px;
    padding:0 14px;
    border-radius:10px;
  }
  .nav-main .nav-link.is-active{background:rgba(47,227,200,.1);border:1px solid rgba(47,227,200,.3);}
  .nav-main .nav-link.is-active::after,
  .nav-main .nav-link.is-active::before{display:none;}
  .head-grid{grid-template-columns:1fr;gap:var(--gap-4);}
  .page-head h1{font-size:36px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .cap-grid{grid-template-columns:1fr;}
  .switch-bar{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{grid-template-columns:1fr;gap:var(--gap-4);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--gap-4);}
}
@media (max-width:768px){
  :root{--sec:56px;}
  .container{padding:0 16px;}
  .page-head{padding:38px 0 52px;}
  .page-head h1{font-size:31px;}
  .head-lead{font-size:16px;}
  .section h2{font-size:24px;}
  .stats-grid{grid-template-columns:1fr 1fr;margin:0 -16px;}
  .stat{padding:22px 18px;}
  .stat-num{font-size:24px;}
  .timeline{padding-left:44px;}
  .timeline::before{left:15px;}
  .tl-item{padding:22px 20px;}
  .tl-item::before{left:-37px;top:28px;width:10px;height:10px;}
  .tl-points{grid-template-columns:1fr;}
  .cta-band{padding:28px 22px;}
  .cta-inner h2{font-size:23px;}
  .subscribe-form{padding:20px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .page-head h1{font-size:27px;}
  .stats-grid{grid-template-columns:1fr;}
  .switch-bar{grid-template-columns:1fr;}
  .head-cta .btn,.cta-actions .btn{width:100%;}
  .faq-q{font-size:16px;}
  .btn{min-height:48px;}
}

/* roulang page: category3 */
:root{
  --bg:#08090C;
  --bg-2:#0F1116;
  --surface:#14171E;
  --surface-2:#1A1E27;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --primary:#2FE3C8;
  --primary-deep:#12B39B;
  --accent:#7C5CFF;
  --hot:#FF5C7A;
  --t1:#EDF1F7;
  --t2:#A8B2C1;
  --t3:#6E7787;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow:0 1px 0 rgba(255,255,255,.04),0 18px 40px -20px rgba(0,0,0,.8);
  --glow:0 0 0 1px var(--primary),0 0 24px -6px rgba(47,227,200,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:180ms;
  --space-section:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--t1);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.875;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:72px 72px;
}
body.nav-open{overflow:hidden}
img{display:block;max-width:100%;height:auto}
a{color:var(--primary);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:#7BF3DF}
button{font:inherit}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--t1)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  line-height:18px;
  letter-spacing:.16em;
  color:var(--primary);
  font-weight:700;
  text-transform:uppercase;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--primary));
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(8,9,12,.88);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.55),rgba(124,92,255,.35),transparent);
  pointer-events:none;
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:64px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--t1);
  font-weight:800;
  flex:0 0 auto;
}
.brand:hover{color:var(--t1)}
.brand-mark{
  width:14px;height:14px;
  border-radius:4px;
  transform:rotate(45deg);
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 16px -2px rgba(47,227,200,.75);
}
.brand-text{font-size:18px;letter-spacing:.02em}
.nav-main{
  display:flex;
  align-items:center;
  gap:4px;
  flex:1 1 auto;
  justify-content:center;
}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:8px 12px;
  border-radius:8px;
  font-size:14px;
  color:var(--t2);
  white-space:nowrap;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.05)}
.nav-link.is-active{color:var(--primary)}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 12px 1px rgba(47,227,200,.75);
}
.nav-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line-strong);
  border-radius:10px;
  background:transparent;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--t1);
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle span::before{position:absolute;transform:translateY(-6px)}
.nav-toggle span::after{position:absolute;transform:translateY(6px)}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:rotate(-45deg)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  color:#04211C;
}
.btn-primary:hover{
  color:#04211C;
  transform:translateY(-2px);
  box-shadow:0 14px 30px -14px rgba(47,227,200,.85);
}
.btn-secondary{
  background:transparent;
  border-color:var(--line-strong);
  color:var(--t1);
}
.btn-secondary:hover{
  color:var(--t1);
  border-color:var(--primary);
  background:rgba(47,227,200,.12);
  transform:translateY(-2px);
}
.btn-ghost{
  background:transparent;
  border-color:transparent;
  color:var(--t2);
  padding:0 12px;
}
.btn-ghost:hover{color:var(--primary);background:rgba(255,255,255,.04)}
.btn-sm{min-height:38px;padding:0 16px;font-size:13px;border-radius:9px}
.btn:disabled,.btn[disabled]{opacity:.42;cursor:not-allowed;transform:none;box-shadow:none}

/* ============ 页头 ============ */
.page-hero{
  position:relative;
  padding:72px 0 56px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  top:-180px;left:-120px;
  width:520px;height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,227,200,.16),transparent 68%);
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;
  bottom:-220px;right:-100px;
  width:480px;height:480px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(124,92,255,.16),transparent 70%);
  pointer-events:none;
}
.hero-title{
  font-size:clamp(30px,4.6vw,44px);
  line-height:1.24;
  margin:14px 0 16px;
  max-width:20ch;
}
.hero-lead{
  font-size:18px;
  line-height:1.75;
  color:var(--t2);
  max-width:56ch;
}
.hero-note{
  margin-top:14px;
  font-size:14px;
  line-height:1.85;
  color:var(--t3);
  max-width:60ch;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-media{
  position:relative;
  border-radius:16px;
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  aspect-ratio:16/10;
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(8,9,12,.12) 0%,rgba(8,9,12,.72) 100%);
}
.hero-media-tag{
  position:absolute;
  left:18px;bottom:16px;
  z-index:2;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--t1);
  padding:6px 12px;
  border-radius:var(--radius-pill);
  background:rgba(8,9,12,.72);
  border:1px solid var(--line-strong);
}
.hero-stats{
  margin-top:40px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
}
.stat{
  background:var(--bg-2);
  padding:20px 22px;
}
.stat-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:26px;
  font-weight:700;
  color:var(--primary);
  letter-spacing:-.02em;
}
.stat-label{font-size:13px;color:var(--t3);letter-spacing:.06em}

/* ============ 板块通用 ============ */
.section{padding:var(--space-section) 0;position:relative}
.section + .section{border-top:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:44px}
.section-title{font-size:clamp(24px,3.2vw,30px);line-height:1.3;margin:12px 0 14px}
.section-desc{color:var(--t2);font-size:16px;line-height:1.85}

/* ============ 挑选维度 ============ */
.dim-card{
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 22px 24px;
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.dim-card:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:var(--glow)}
.dim-index{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:13px;
  letter-spacing:.14em;
  color:var(--accent);
}
.dim-card h3{font-size:18px;line-height:1.5;margin:12px 0 10px}
.dim-card p{font-size:14px;line-height:1.85;color:var(--t2)}

/* ============ 瀑布流合集卡 ============ */
.masonry{
  column-count:3;
  column-gap:24px;
}
.masonry-card{
  break-inside:avoid;
  display:block;
  margin:0 0 24px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
  color:var(--t1);
}
.masonry-card:hover{
  color:var(--t1);
  transform:translateY(-2px);
  border-color:var(--primary);
  box-shadow:var(--glow);
}
.card-media{position:relative;overflow:hidden;background:var(--bg-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--dur) var(--ease)}
.masonry-card:hover .card-media img{transform:scale(1.04)}
.r-16x9{aspect-ratio:16/9}
.r-4x3{aspect-ratio:4/3}
.r-3x2{aspect-ratio:3/2}
.r-1x1{aspect-ratio:1/1}
.badge{
  position:absolute;
  top:12px;left:12px;
  padding:5px 11px;
  border-radius:var(--radius-pill);
  background:rgba(8,9,12,.82);
  border:1px solid var(--line-strong);
  color:var(--primary);
  font-size:12px;
  letter-spacing:.06em;
  font-weight:700;
}
.card-body{padding:18px 20px 22px}
.card-title{font-size:18px;line-height:1.5;margin-bottom:10px}
.card-text{font-size:14px;line-height:1.85;color:var(--t2)}
.card-meta{
  margin-top:16px;
  padding-top:14px;
  border-top:1px dashed var(--line-strong);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:var(--t3);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  letter-spacing:.02em;
}
.card-more{color:var(--primary);font-size:13px;font-weight:700;font-family:inherit;display:inline-flex;gap:6px;align-items:center;transition:transform var(--dur) var(--ease)}
.masonry-card:hover .card-more{transform:translateX(4px)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{
  font-size:12px;
  line-height:18px;
  letter-spacing:.06em;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line-strong);
  color:var(--t2);
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.tag:hover{color:var(--primary);border-color:var(--primary)}

/* ============ 分类互链切换条 ============ */
.switch-bar{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
}
.switch-link{
  display:block;
  padding:20px 20px 18px;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:var(--bg-2);
  color:var(--t2);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),color var(--dur) var(--ease);
}
.switch-link:hover{color:var(--t1);transform:translateY(-2px);border-color:var(--line-strong)}
.switch-link .switch-label{font-size:12px;letter-spacing:.14em;color:var(--t3);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
.switch-link strong{display:block;font-size:16px;margin-top:10px;color:inherit;font-weight:700}
.switch-link.is-active{
  color:var(--t1);
  border-color:var(--primary);
  box-shadow:var(--glow);
  background:linear-gradient(160deg,rgba(47,227,200,.12),rgba(20,23,30,.9));
}
.switch-link.is-active .switch-label{color:var(--primary)}
.switch-link.is-active strong::after{
  content:"";
  display:inline-block;
  width:7px;height:7px;
  margin-left:9px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 12px 2px rgba(47,227,200,.8);
  vertical-align:middle;
}

/* ============ 使用顺序 ============ */
.step-card{
  height:100%;
  position:relative;
  padding:26px 22px 24px;
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:var(--surface);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.step-card:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:var(--glow)}
.step-num{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12px;
  letter-spacing:.18em;
  color:var(--primary);
}
.step-card h3{font-size:17px;margin:12px 0 10px;line-height:1.5}
.step-card p{font-size:14px;line-height:1.85;color:var(--t2)}
.step-line{
  height:1px;
  margin:0 0 32px;
  background:linear-gradient(90deg,rgba(47,227,200,.5),rgba(124,92,255,.4),transparent);
}

/* ============ FAQ ============ */
.faq{max-width:880px}
.faq-item{
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface-2);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item.is-open{border-color:var(--primary);box-shadow:var(--glow)}
.faq-q{
  width:100%;
  min-height:56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 20px;
  background:transparent;
  border:0;
  color:var(--t1);
  text-align:left;
  font-size:16px;
  font-weight:700;
  cursor:pointer;
  transition:color var(--dur) var(--ease);
}
.faq-q h3{font-size:16px;font-weight:700;line-height:1.6}
.faq-q:hover{color:var(--primary)}
.faq-icon{
  position:relative;
  flex:0 0 auto;
  width:18px;height:18px;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--primary);
  border-radius:2px;
  transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.faq-icon::before{top:8px;left:0;width:18px;height:2px}
.faq-icon::after{top:0;left:8px;width:2px;height:18px}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 260ms var(--ease);
}
.faq-a p{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.9;
  color:var(--t2);
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:18px;
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(47,227,200,.14),rgba(124,92,255,.12) 55%,rgba(20,23,30,.9));
  padding:44px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:repeating-linear-gradient(90deg,rgba(255,255,255,.05) 0 1px,transparent 1px 14px);
  opacity:.5;
  animation:scanmove 8s linear infinite;
}
@keyframes scanmove{
  from{transform:translateX(0)}
  to{transform:translateX(28px)}
}
.cta-band h2{font-size:clamp(22px,3vw,28px);line-height:1.35;margin-bottom:10px;position:relative;z-index:1}
.cta-band p{color:var(--t2);font-size:15px;max-width:52ch;position:relative;z-index:1}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1;flex:0 0 auto}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  margin-top:0;
  border-top:1px solid var(--line);
  background:var(--bg-2);
  padding:56px 0 24px;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.55),rgba(124,92,255,.35),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:36px;
  border-bottom:1px solid var(--line);
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
  font-weight:800;
  font-size:17px;
}
.footer-col p{font-size:14px;line-height:1.9;color:var(--t3)}
.footer-col h3{font-size:14px;letter-spacing:.08em;color:var(--t1);margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col li a{font-size:14px;color:var(--t2)}
.footer-col li a:hover{color:var(--primary)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-top:20px;
  font-size:13px;
  color:var(--t3);
}
.footer-bottom .sep{color:var(--line-strong)}

/* ============ 响应式 ============ */
@media (min-width:1440px){
  .container{max-width:1280px}
}
@media (max-width:1024px){
  :root{--space-section:72px}
  .masonry{column-count:2}
  .switch-bar{grid-template-columns:repeat(2,minmax(0,1fr))}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
}
@media (max-width:900px){
  .nav-main{
    position:fixed;
    top:64px;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:12px 24px 24px;
    background:var(--bg-2);
    border-bottom:1px solid var(--line);
    max-height:calc(100vh - 64px);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
  }
  .nav-main.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .nav-link{
    min-height:52px;
    font-size:16px;
    border-bottom:1px solid var(--line);
    border-radius:0;
    padding:0 4px;
  }
  .nav-link.is-active::after{display:none}
  .nav-toggle{display:inline-flex}
  .cta-band{flex-direction:column;align-items:flex-start;padding:34px 26px}
  .cta-actions{width:100%}
}
@media (max-width:640px){
  :root{--space-section:56px}
  .container{padding:0 16px}
  body{font-size:15px}
  .nav-inner{height:56px}
  .nav-main{top:56px;max-height:calc(100vh - 56px);padding:12px 16px 20px}
  .brand-text{font-size:16px}
  .page-hero{padding:48px 0 40px}
  .hero-title{max-width:none}
  .hero-lead{font-size:16px}
  .hero-cta .btn{width:100%}
  .hero-stats{grid-template-columns:1fr 1fr}
  .stat{padding:16px 16px}
  .stat-num{font-size:22px}
  .masonry{column-count:1}
  .switch-bar{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-actions .btn{width:100%}
  .section-head{margin-bottom:32px}
  .faq-q{font-size:15px;padding:14px 16px}
  .faq-a p{padding:0 16px 18px;font-size:14px}
}

/* roulang page: category4 */
:root{
  --bg:#08090C;
  --bg-2:#0F1116;
  --surface:#14171E;
  --surface-2:#1A1E27;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --primary:#2FE3C8;
  --primary-deep:#12B39B;
  --accent:#7C5CFF;
  --hot:#FF5C7A;
  --t1:#EDF1F7;
  --t2:#A8B2C1;
  --t3:#6E7787;
  --r-card:14px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --shadow:inset 0 1px 0 rgba(255,255,255,.04), 0 18px 40px -20px rgba(0,0,0,.8);
  --glow:0 0 0 1px var(--primary), 0 0 24px -6px rgba(47,227,200,.45);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:180ms;
  --gap-s:56px;
  --gap-m:72px;
  --gap-l:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.875;
  color:var(--t1);
  background:
    radial-gradient(1200px 620px at 84% -12%, rgba(124,92,255,.12), transparent 62%),
    radial-gradient(900px 520px at 4% 2%, rgba(47,227,200,.09), transparent 58%),
    var(--bg);
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size:88px 88px;
  mask-image:radial-gradient(circle at 50% 12%, #000 0%, transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 12%, #000 0%, transparent 78%);
}
img{max-width:100%;display:block;border:0;}
a{color:var(--primary);text-decoration:none;transition:color var(--dur) var(--ease),opacity var(--dur) var(--ease);}
a:hover{color:var(--primary);opacity:.86;}
h1,h2,h3,h4{color:var(--t1);font-weight:800;letter-spacing:-.01em;margin:0;line-height:1.25;}
h1{font-size:44px;line-height:1.2;}
h2{font-size:30px;line-height:1.3;}
h3{font-size:20px;line-height:1.45;}
p{margin:0 0 14px;color:var(--t2);}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
main{position:relative;z-index:1;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn-primary{background:var(--primary);color:#05221E;border-color:var(--primary);}
.btn-primary:hover,.btn-primary:focus{background:#4FF0D8;border-color:#4FF0D8;color:#05221E;transform:translateY(-2px);box-shadow:0 0 24px -6px rgba(47,227,200,.55);}
.btn-secondary{background:transparent;color:var(--t1);border-color:var(--line-strong);}
.btn-secondary:hover,.btn-secondary:focus{background:rgba(47,227,200,.12);border-color:var(--primary);color:var(--t1);transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--t2);border-color:transparent;padding:0 12px;}
.btn-ghost:hover,.btn-ghost:focus{color:var(--primary);}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;}
.btn:active{transform:translateY(0);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,9,12,.9);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.7),rgba(124,92,255,.6),transparent);
  opacity:.7;
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--t1);font-weight:800;font-size:18px;letter-spacing:.02em;}
.brand:hover{color:var(--t1);opacity:1;}
.brand-mark{
  width:16px;height:16px;border-radius:4px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  box-shadow:0 0 14px -2px rgba(47,227,200,.7);
  transform:rotate(12deg);
}
.brand-text{white-space:nowrap;}
.nav-main{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:38px;padding:0 12px;
  color:var(--t2);font-size:14.5px;font-weight:500;border-radius:8px;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.05);opacity:1;}
.nav-link.is-active{color:var(--primary);}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 12px rgba(47,227,200,.8);
}
.nav-link.is-active::before{
  content:"";position:absolute;top:4px;right:6px;width:4px;height:4px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 8px rgba(47,227,200,.9);
}
.nav-actions{display:flex;align-items:center;gap:10px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line-strong);border-radius:10px;
  background:transparent;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--t1);border-radius:2px;
  transform:translateX(-50%);transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";left:0;transform:none;top:-6px;}
.nav-toggle span::after{content:"";left:0;transform:none;top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:rotate(45deg);top:0;}
.nav-toggle[aria-expanded="true"] span::after{transform:rotate(-45deg);top:0;}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  padding:76px 0 0;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(8,9,12,.94) 0%,rgba(8,9,12,.78) 46%,rgba(8,9,12,.58) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  opacity:.9;
}
.page-hero::after{
  content:"";position:absolute;left:50%;bottom:-140px;transform:translateX(-50%);
  width:520px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,227,200,.22),transparent 70%);
  filter:blur(10px);pointer-events:none;
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:44px;align-items:center;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--t3);margin-bottom:18px;letter-spacing:.04em;}
.breadcrumb a{color:var(--t3);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:rgba(255,255,255,.22);}
.tag-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 13px;border-radius:var(--r-pill);
  background:rgba(47,227,200,.1);border:1px solid rgba(47,227,200,.34);
  color:var(--primary);font-size:12px;letter-spacing:.06em;font-weight:600;
}
.page-hero h1{margin:18px 0 16px;font-size:44px;}
.page-hero h1 em{font-style:normal;color:var(--primary);}
.hero-lead{font-size:17px;line-height:1.85;color:var(--t2);max-width:56ch;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-panel{
  border:1px solid var(--line);border-radius:var(--r-card);background:linear-gradient(160deg,var(--surface),var(--bg-2));
  box-shadow:var(--shadow);padding:22px;position:relative;overflow:hidden;
}
.hero-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent),transparent);
}
.hero-panel h2{font-size:15px;letter-spacing:.08em;color:var(--t3);font-weight:600;text-transform:uppercase;margin-bottom:14px;}
.hero-panel ul{display:grid;gap:12px;}
.hero-panel li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--t2);line-height:1.7;}
.dot{flex:none;width:8px;height:8px;margin-top:9px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px rgba(47,227,200,.8);}
.dot.purple{background:var(--accent);box-shadow:0 0 10px rgba(124,92,255,.8);}
.dot.hot{background:var(--hot);box-shadow:0 0 10px rgba(255,92,122,.8);}
.dot.grey{background:var(--t3);box-shadow:none;}

/* ---------- 数据条 ---------- */
.stat-bar{
  position:relative;z-index:2;margin-top:56px;
  border-top:1px solid var(--line);
  background:rgba(15,17,22,.72);
}
.stat-bar .grid-x{margin:0;}
.stat-bar .cell{padding:0;}
.stat{
  padding:24px 22px;border-right:1px solid var(--line);
  display:flex;flex-direction:column;gap:6px;height:100%;
}
.stat:last-child{border-right:0;}
.stat-num{font-size:26px;font-weight:800;color:var(--t1);letter-spacing:-.02em;font-variant-numeric:tabular-nums;}
.stat-num span{font-size:14px;font-weight:600;color:var(--primary);margin-left:4px;}
.stat-label{font-size:13px;color:var(--t3);letter-spacing:.05em;}

/* ---------- 通用板块 ---------- */
.section{padding:var(--gap-l) 0;}
.section--tight{padding:var(--gap-m) 0;}
.section-head{max-width:760px;margin-bottom:42px;}
.section-head .kicker{font-size:12px;letter-spacing:.16em;color:var(--primary);font-weight:700;margin-bottom:12px;}
.section-head h2{margin-bottom:12px;}
.section-head p{font-size:16px;color:var(--t2);}

/* ---------- Z 字图文交替 ---------- */
.z-wrap{border-top:1px solid var(--line);}
.z-block{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:52px;align-items:center;
  padding:52px 0;border-bottom:1px solid var(--line);
}
.z-block:last-child{border-bottom:0;}
.z-block.is-reverse .z-media{order:2;}
.z-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);background:var(--surface);
}
.z-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform var(--dur) var(--ease);}
.z-block:hover .z-media img{transform:scale(1.04);}
.z-media .z-tag{
  position:absolute;left:14px;top:14px;padding:4px 11px;border-radius:var(--r-pill);
  background:rgba(8,9,12,.78);border:1px solid var(--line-strong);
  font-size:12px;letter-spacing:.06em;color:var(--t1);
}
.z-body .z-index{
  display:inline-block;font-size:13px;letter-spacing:.18em;color:var(--t3);
  font-weight:700;margin-bottom:14px;
}
.z-body h3{font-size:24px;margin-bottom:14px;}
.z-body p{font-size:15.5px;line-height:1.85;max-width:56ch;}
.z-list{margin-top:18px;display:grid;gap:10px;}
.z-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--t2);line-height:1.75;}
.z-list li::before{
  content:"";flex:none;width:6px;height:6px;margin-top:10px;border-radius:2px;
  background:var(--primary);transform:rotate(45deg);
}

/* ---------- 分类切换条 ---------- */
.cat-switch{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-2);}
.cat-switch .section-head{margin-bottom:30px;}
.cat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;}
.cat-item{
  display:block;padding:20px 20px 22px;border-radius:var(--r-card);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.cat-item:hover{transform:translateY(-3px);border-color:rgba(47,227,200,.5);box-shadow:var(--glow);opacity:1;}
.cat-item .cat-no{display:block;font-size:12px;letter-spacing:.16em;color:var(--t3);margin-bottom:10px;}
.cat-item strong{display:block;color:var(--t1);font-size:16.5px;font-weight:700;margin-bottom:8px;}
.cat-item span.cat-desc{display:block;font-size:13.5px;color:var(--t2);line-height:1.7;}
.cat-item.is-active{
  background:linear-gradient(160deg,rgba(47,227,200,.12),var(--surface) 60%);
  border-color:var(--primary);box-shadow:0 0 0 1px var(--primary),0 0 26px -8px rgba(47,227,200,.55);
}
.cat-item.is-active .cat-no{color:var(--primary);}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:900px;}
.faq-item{border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);overflow:hidden;transition:border-color var(--dur) var(--ease);}
.faq-item.is-open{border-color:rgba(47,227,200,.45);}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;background:transparent;border:0;cursor:pointer;text-align:left;
  color:var(--t1);font-size:16px;font-weight:600;line-height:1.6;
}
.faq-q:hover{color:var(--primary);}
.faq-icon{
  flex:none;width:22px;height:22px;position:relative;border-radius:50%;
  border:1px solid var(--line-strong);transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--t2);border-radius:2px;transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:1.5px;}
.faq-icon::after{width:1.5px;height:10px;transition:opacity var(--dur) var(--ease);}
.faq-item.is-open .faq-icon{border-color:var(--primary);transform:rotate(180deg);}
.faq-item.is-open .faq-icon::after{opacity:0;}
.faq-item.is-open .faq-icon::before{background:var(--primary);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 300ms var(--ease);}
.faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--t2);max-width:70ch;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:linear-gradient(120deg,rgba(47,227,200,.09),rgba(124,92,255,.09) 60%,transparent);
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(90deg,rgba(255,255,255,.05) 0 1px,transparent 1px 8px);
  opacity:.35;
  animation:scan 8s linear infinite;
}
@keyframes scan{from{transform:translateX(0);}to{transform:translateX(8px);}}
.cta-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);gap:40px;align-items:center;padding:56px 0;position:relative;z-index:2;}
.cta-inner h2{font-size:28px;margin-bottom:12px;}
.cta-inner p{font-size:15.5px;max-width:52ch;}
.sub-form{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:end;}
.field{display:flex;flex-direction:column;gap:8px;}
.field label{font-size:13px;color:var(--t3);letter-spacing:.05em;}
.field input{
  height:44px;padding:0 14px;border-radius:var(--r-btn);
  background:rgba(8,9,12,.7);border:1px solid var(--line-strong);color:var(--t1);font-size:15px;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.field input::placeholder{color:var(--t3);}
.field input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,227,200,.18);}
.field input.is-error{border-color:var(--hot);box-shadow:0 0 0 3px rgba(255,92,122,.16);}
.form-hint{grid-column:1 / -1;font-size:13px;color:var(--t3);}
.form-hint.is-error{color:var(--hot);}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);position:relative;background:var(--bg-2);margin-top:0;}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,200,.65),rgba(124,92,255,.55),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px;padding:56px 0 40px;}
.footer-brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--t1);margin-bottom:14px;}
.footer-col h3{font-size:14px;letter-spacing:.1em;color:var(--t2);font-weight:700;margin-bottom:16px;}
.footer-col p{font-size:14px;color:var(--t3);line-height:1.8;max-width:38ch;}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--t2);}
.footer-col ul a:hover{color:var(--primary);opacity:1;}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 30px;
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;
  font-size:13px;color:var(--t3);
}
.footer-bottom .sep{color:rgba(255,255,255,.18);}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  h1{font-size:36px;}
  .page-hero h1{font-size:36px;}
  .section{padding:var(--gap-m) 0;}
  .hero-inner{grid-template-columns:1fr;gap:34px;}
  .z-block{gap:32px;padding:44px 0;}
  .cat-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{grid-template-columns:1fr;gap:28px;padding:48px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:900px){
  .nav-toggle{display:block;}
  .nav-main{
    position:fixed;top:56px;left:0;right:0;bottom:0;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:22px 20px 40px;
    background:rgba(8,9,12,.98);
    border-top:1px solid var(--line);
    transform:translateY(-12px);opacity:0;visibility:hidden;
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility var(--dur) var(--ease);
    overflow-y:auto;
  }
  .nav-main.is-open{transform:translateY(0);opacity:1;visibility:visible;}
  .nav-link{height:52px;font-size:17px;padding:0 6px;border-bottom:1px solid var(--line);border-radius:0;}
  .nav-link.is-active::after{left:6px;right:auto;width:34px;}
  .nav-link.is-active::before{display:none;}
  .nav-inner{height:56px;}
  .site-header{height:56px;}
  .page-hero{padding-top:52px;}
  .z-block{grid-template-columns:1fr;}
  .z-block.is-reverse .z-media{order:0;}
}
@media (max-width:640px){
  .container{padding:0 16px;}
  h1{font-size:30px;line-height:1.28;}
  .page-hero h1{font-size:30px;}
  h2{font-size:24px;line-height:1.32;}
  h3{font-size:19px;}
  .section{padding:var(--gap-s) 0;}
  .hero-lead{font-size:15.5px;}
  .stat{padding:18px 16px;border-right:0;border-bottom:1px solid var(--line);}
  .stat-bar .cell:last-child .stat{border-bottom:0;}
  .cat-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;padding:44px 0 32px;}
  .sub-form{grid-template-columns:1fr;}
  .z-body h3{font-size:21px;}
  .cta-inner h2{font-size:23px;}
}