/* roulang page: index */
:root{
  --c-bg:#0A0E13;
  --c-bg-elev:#121821;
  --c-panel:#171F2A;
  --c-line:rgba(255,255,255,.08);
  --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#12E3B0;
  --c-primary-deep:#0BA98A;
  --c-accent:#8A6BFF;
  --c-warm:#FF8A4C;
  --c-text:#CBD6E2;
  --c-title:#F2F6FA;
  --c-muted:#8494A6;
  --c-ok:#16C784;
  --c-warn:#FFB020;
  --c-err:#FF5A5F;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-table:16px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,.05), 0 24px 48px -32px rgba(0,0,0,.9);
  --glow:0 0 0 1px rgba(18,227,176,.35), 0 0 28px -8px rgba(18,227,176,.45);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-mono:"SFMono-Regular",Inter,Consolas,Menlo,monospace;
  --wrap:1220px;
  --gutter:clamp(16px,4vw,32px);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  text-align:left;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:72px 72px;
}
img{max-width:100%;height:auto;display:block;border:0;}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;}
a:hover{color:#4ff0c6;}
h1,h2,h3,h4{margin:0;color:var(--c-title);font-weight:700;letter-spacing:-.01em;}
h1{font-size:clamp(30px,4.2vw,46px);line-height:1.25;}
h2{font-size:clamp(24px,2.8vw,32px);line-height:1.35;}
h3{font-size:20px;line-height:1.5;}
p{margin:0 0 1.05em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;}
section[id]{scroll-margin-top:92px;}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter);}
.grid-x>.cell{min-width:0;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,14,19,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent 0%,rgba(18,227,176,.6) 32%,rgba(138,107,255,.45) 70%,transparent 100%);
}
.nav-inner{display:flex;align-items:center;gap:clamp(10px,2vw,26px);height:70px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none;}
.logo-mark{
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--c-primary),#0aa7d6);
  color:#04201a;font-family:var(--font-mono);font-weight:800;font-size:14px;letter-spacing:-.02em;
  box-shadow:0 0 18px -6px rgba(18,227,176,.85);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text b{color:var(--c-title);font-size:16px;font-weight:700;}
.logo-text span{color:var(--c-muted);font-size:11px;letter-spacing:.06em;}
.nav-links{display:flex;align-items:center;gap:clamp(2px,1vw,12px);margin-left:auto;}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:70px;padding:0 10px;
  color:var(--c-text);font-size:15px;
}
.nav-links a::after{
  content:"";position:absolute;left:10px;right:10px;bottom:18px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease-out;box-shadow:0 0 10px rgba(18,227,176,.85);
}
.nav-links a:hover{color:rgba(18,227,176,.85);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.is-active{color:var(--c-title);font-weight:600;}
.nav-links a.is-active::after{transform:scaleX(1);}
.nav-cta{flex:none;}
.btn-primary.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--c-line-strong);background:transparent;color:var(--c-title);
  cursor:pointer;place-items:center;transition:border-color .18s ease-out,color .18s ease-out;
}
.nav-toggle:hover{border-color:rgba(18,227,176,.55);color:var(--c-primary);}

/* ---------- 抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(4,7,10,.74);z-index:110;
  opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);z-index:120;
  background:#0d1219;border-left:1px solid var(--c-line);
  transform:translateX(102%);transition:transform .26s ease-out;
  display:flex;flex-direction:column;padding:18px 20px 30px;overflow-y:auto;
}
.drawer.is-open{transform:none;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--c-line);}
.drawer-close{width:44px;height:44px;border-radius:10px;border:1px solid var(--c-line-strong);background:transparent;color:var(--c-title);cursor:pointer;}
.drawer-close:hover{border-color:rgba(18,227,176,.55);color:var(--c-primary);}
.drawer-nav{padding:10px 0;flex:1;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;color:var(--c-text);font-size:15px;border-bottom:1px solid var(--c-line);
}
.drawer-nav a:last-child{border-bottom:0;}
.drawer-nav a.is-active{color:var(--c-primary);font-weight:600;}
.drawer-foot{margin-top:18px;}
.drawer-foot .btn{width:100%;}
body.no-scroll{overflow:hidden;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.btn-primary{background:var(--c-primary);color:#062018;box-shadow:0 0 24px -10px rgba(18,227,176,.9);}
.btn-primary:hover{background:#3df0c4;color:#062018;box-shadow:0 0 0 1px rgba(18,227,176,.5),0 0 32px -8px rgba(18,227,176,.75);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--c-line-strong);color:var(--c-primary);}
.btn-ghost:hover{border-color:rgba(18,227,176,.55);background:rgba(18,227,176,.08);color:#5bf3cd;}
.btn-ghost:active{transform:translateY(1px);}
.btn-warm{background:transparent;border-color:rgba(255,138,76,.5);color:var(--c-warm);}
.btn-warm:hover{background:rgba(255,138,76,.1);border-color:var(--c-warm);color:#ffa172;}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:14px;font-weight:600;}
.link-arrow i{transition:transform .18s ease-out;font-size:12px;}
.link-arrow:hover i{transform:translateX(3px);}

/* ---------- 通用板块 ---------- */
.section{padding:clamp(64px,8vw,116px) 0;}
.section-alt{background:var(--c-bg-elev);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.section-head{max-width:780px;margin-bottom:clamp(28px,4vw,46px);}
.section-head p{color:var(--c-muted);font-size:15px;margin-top:12px;}
.section-head.is-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;max-width:none;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--c-primary);font-family:var(--font-mono);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--c-primary);display:inline-block;opacity:.8;}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(54px,7vw,96px) 0 clamp(44px,6vw,76px);}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;opacity:.3;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(1000px 480px at 78% 8%, rgba(18,227,176,.15), transparent 62%),
    radial-gradient(760px 440px at 8% 96%, rgba(138,107,255,.14), transparent 66%),
    linear-gradient(180deg, rgba(10,14,19,.7) 0%, rgba(10,14,19,.93) 74%, var(--c-bg) 100%);
}
.hero>.wrap{position:relative;z-index:2;}
.hero h1{margin:0 0 18px;}
.hero-sub{font-size:17px;color:var(--c-text);max-width:560px;margin-bottom:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px;}
.hero-visual{
  position:relative;margin:0;border-radius:16px;overflow:hidden;
  border:1px solid var(--c-line-strong);background:var(--c-panel);
  box-shadow:var(--shadow-card);
}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero-visual figcaption{
  position:absolute;left:16px;bottom:14px;right:16px;
  font-size:12px;color:var(--c-muted);font-family:var(--font-mono);letter-spacing:.04em;
}
.hero-metrics{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;
  margin-top:clamp(30px,4vw,44px);padding-top:24px;border-top:1px solid var(--c-line);
}
.hero-metrics li{display:flex;flex-direction:column;gap:4px;}
.m-num{font-family:var(--font-mono);font-size:13px;color:var(--c-primary);letter-spacing:.1em;}
.m-label{font-size:14px;color:var(--c-text);}

/* ---------- 标签徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:12px;letter-spacing:.02em;
  border:1px solid var(--c-line-strong);color:var(--c-muted);background:rgba(255,255,255,.02);
}
.tag-primary{color:var(--c-primary);border-color:rgba(18,227,176,.4);background:rgba(18,227,176,.08);}
.tag-accent{color:#b9a8ff;border-color:rgba(138,107,255,.45);background:rgba(138,107,255,.1);}
.tag-warm{color:var(--c-warm);border-color:rgba(255,138,76,.45);background:rgba(255,138,76,.08);}

/* ---------- 信任条 ---------- */
.trust{padding:clamp(28px,4vw,44px) 0;border-bottom:1px solid var(--c-line);background:rgba(18,24,33,.6);}
.trust-item{display:flex;align-items:flex-start;gap:14px;padding:14px 0;}
.trust-icon{
  flex:none;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:rgba(18,227,176,.1);color:var(--c-primary);font-size:16px;border:1px solid rgba(18,227,176,.24);
}
.trust-item b{display:block;color:var(--c-title);font-size:15px;font-weight:600;line-height:1.6;}
.trust-item span{display:block;color:var(--c-muted);font-size:13px;line-height:1.7;}

/* ---------- 对比表 ---------- */
.table-scroll{
  overflow-x:auto;border:1px solid var(--c-line);border-radius:var(--r-table);
  background:var(--c-panel);box-shadow:var(--shadow-card);
  -webkit-overflow-scrolling:touch;
}
table.compare{width:100%;min-width:820px;border-collapse:collapse;margin:0;background:transparent;font-size:15px;border:0;}
table.compare caption{
  caption-side:top;text-align:left;padding:18px 22px 14px;color:var(--c-muted);font-size:14px;
  border-bottom:1px solid var(--c-line);
}
table.compare thead{background:transparent;color:var(--c-title);}
table.compare th,table.compare td{
  padding:14px 18px;border-bottom:1px solid var(--c-line);text-align:left;vertical-align:middle;
  font-size:15px;line-height:1.6;
}
table.compare thead th{
  position:sticky;top:0;z-index:3;background:#121821;color:var(--c-title);
  font-weight:600;font-size:14px;letter-spacing:.02em;white-space:nowrap;
}
table.compare tbody th{
  position:sticky;left:0;z-index:2;background:var(--c-panel);color:var(--c-title);
  font-weight:500;font-size:14px;white-space:nowrap;
}
table.compare tbody tr:hover td{background:rgba(255,255,255,.03);}
table.compare .is-hl{background:rgba(18,227,176,.07);}
table.compare thead th.is-hl{box-shadow:inset 0 0 0 1px rgba(18,227,176,.4);color:var(--c-primary);}
table.compare tbody td.is-hl{box-shadow:inset 1px 0 0 rgba(18,227,176,.22),inset -1px 0 0 rgba(18,227,176,.22);}
table.compare .ico-yes{color:var(--c-ok);font-size:14px;}
table.compare .ico-no{color:rgba(255,255,255,.22);font-size:14px;}
table.compare .txt-cell{color:var(--c-text);font-size:14px;}
.table-hint{margin-top:14px;font-size:13px;color:var(--c-muted);}

/* ---------- 等级亮点 ---------- */
.tier{
  position:relative;height:100%;display:flex;flex-direction:column;gap:16px;
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.tier:hover{transform:translateY(-2px);border-color:rgba(18,227,176,.32);box-shadow:var(--shadow-card),0 0 28px -10px rgba(18,227,176,.4);}
.tier.is-featured{border-color:rgba(18,227,176,.45);box-shadow:var(--shadow-card),var(--glow);}
.tier-flag{
  position:absolute;top:-1px;right:20px;height:24px;padding:0 12px;border-radius:0 0 8px 8px;
  background:var(--c-primary);color:#062018;font-size:12px;font-weight:700;display:grid;place-items:center;
}
.tier-name{font-size:19px;color:var(--c-title);font-weight:700;}
.tier-desc{font-size:14px;color:var(--c-muted);}
.tier-list{display:flex;flex-direction:column;gap:10px;margin-top:2px;}
.tier-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--c-text);line-height:1.7;}
.tier-list i{color:var(--c-primary);font-size:12px;margin-top:8px;flex:none;}
.tier-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--c-line);display:flex;align-items:center;justify-content:space-between;gap:12px;}
.tier-price{font-family:var(--font-mono);color:var(--c-warm);font-size:14px;letter-spacing:.04em;}

/* ---------- 内容卡 ---------- */
.card{
  height:100%;display:flex;flex-direction:column;overflow:hidden;
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.card:hover{transform:translateY(-2px);border-color:rgba(18,227,176,.35);box-shadow:var(--shadow-card),0 0 28px -8px rgba(18,227,176,.45);}
.card-thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:#0f151d;}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease-out;}
.card:hover .card-thumb img{transform:scale(1.03);}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{font-size:18px;line-height:1.55;}
.card-title a{color:var(--c-title);}
.card:hover .card-title a{color:var(--c-primary);}
.card-excerpt{
  color:var(--c-muted);font-size:14px;line-height:1.8;margin:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px;color:var(--c-muted);}
.card-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--c-line-strong);}
.card-foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid var(--c-line);}
.card-wide{flex-direction:row;}
.card-wide .card-thumb{width:48%;aspect-ratio:auto;min-height:220px;}
.card-wide .card-body{width:52%;padding:26px 26px 24px;}
.lock{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--c-accent);
  border:1px solid rgba(138,107,255,.4);background:rgba(138,107,255,.1);
  height:24px;padding:0 10px;border-radius:var(--r-pill);
}
.card-mini{display:flex;gap:16px;padding:16px;align-items:center;height:100%;
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;}
.card-mini:hover{transform:translateY(-2px);border-color:rgba(138,107,255,.4);box-shadow:var(--shadow-card),0 0 26px -10px rgba(138,107,255,.5);}
.card-mini img{width:104px;height:78px;object-fit:cover;border-radius:10px;flex:none;}
.card-mini h3{font-size:15.5px;line-height:1.55;margin-bottom:6px;}
.card-mini p{margin:0;font-size:13px;color:var(--c-muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}

/* ---------- 空态 ---------- */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  padding:clamp(38px,6vw,64px) 24px;text-align:center;
  border:1px dashed var(--c-line-strong);border-radius:var(--r-card);background:rgba(255,255,255,.015);
}
.empty-state i{font-size:26px;color:var(--c-muted);}
.empty-state p{color:var(--c-muted);font-size:14px;margin:0;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item[open]{border-color:rgba(18,227,176,.35);box-shadow:inset 2px 0 0 var(--c-primary),0 0 26px -14px rgba(18,227,176,.6);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 22px;cursor:pointer;list-style:none;
  color:var(--c-title);font-size:16px;font-weight:600;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--c-primary);}
.faq-mark{position:relative;width:16px;height:16px;flex:none;}
.faq-mark::before,.faq-mark::after{content:"";position:absolute;background:var(--c-primary);border-radius:2px;transition:transform .2s ease-out;}
.faq-mark::before{left:0;top:7px;width:16px;height:2px;}
.faq-mark::after{top:0;left:7px;width:2px;height:16px;}
.faq-item[open] .faq-mark::after{transform:scaleY(0);}
.faq-body{padding:0 22px 20px;font-size:15px;line-height:1.9;color:var(--c-text);animation:faqIn .22s ease-out;}
@keyframes faqIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ---------- CTA ---------- */
.cta-band{
  padding:clamp(56px,7vw,96px) 0;
  background:linear-gradient(135deg,rgba(18,227,176,.08),rgba(138,107,255,.09)),var(--c-bg-elev);
  border-top:1px solid var(--c-line);
}
.cta-panel{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  border:1px solid rgba(18,227,176,.3);border-radius:18px;
  padding:clamp(24px,4vw,42px);background:rgba(18,227,176,.04);
  box-shadow:0 0 46px -28px rgba(18,227,176,.85);
}
.cta-panel h2{margin-bottom:10px;}
.cta-panel p{color:var(--c-muted);font-size:15px;max-width:560px;margin:0;}

/* ---------- 页脚 ---------- */
.site-footer{background:#080B10;border-top:1px solid var(--c-line);padding:clamp(46px,6vw,72px) 0 0;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-about{color:var(--c-muted);font-size:14px;line-height:1.85;max-width:340px;}
.footer-title{color:var(--c-title);font-size:15px;font-weight:600;margin-bottom:14px;letter-spacing:.02em;}
.footer-list{display:flex;flex-direction:column;gap:10px;}
.footer-list a,.footer-list span{color:var(--c-muted);font-size:14px;}
.footer-list a:hover{color:var(--c-primary);}
.footer-bottom{
  margin-top:clamp(34px,5vw,52px);padding:20px 0 26px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  color:var(--c-muted);font-size:13px;
}
.footer-bottom .mono{font-family:var(--font-mono);letter-spacing:.02em;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:inline-grid;margin-left:auto;}
  .card-wide{flex-direction:column;}
  .card-wide .card-thumb{width:100%;aspect-ratio:16/9;min-height:0;}
  .card-wide .card-body{width:100%;padding:22px 22px 22px;}
  .section-head.is-row{align-items:flex-start;flex-direction:column;gap:12px;}
}
@media (max-width:767px){
  .hero-metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 14px;}
  .card-mini img{width:88px;height:68px;}
  .cta-panel{flex-direction:column;align-items:flex-start;}
  .btn{width:auto;}
  .btn-row{width:100%;}
  .btn-row .btn{flex:1 1 46%;}
}
@media (max-width:560px){
  body{font-size:15.5px;}
  .logo-text span{display:none;}
  .hero-sub{font-size:15.5px;}
  .btn-row .btn{flex:1 1 100%;width:100%;}
  .card-mini{flex-direction:column;align-items:flex-start;}
  .card-mini img{width:100%;height:150px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion: reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
  --c-bg:#0A0E13; --c-bg-elev:#121821; --c-panel:#171F2A;
  --c-line:rgba(255,255,255,.08); --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#12E3B0; --c-primary-deep:#0BA98A; --c-accent:#8A6BFF; --c-warm:#FF8A4C;
  --c-text:#CBD6E2; --c-title:#F2F6FA; --c-muted:#8494A6;
  --c-ok:#16C784; --c-warn:#FFB020; --c-err:#FF5A5F;
  --r-card:14px; --r-btn:10px; --r-pill:999px; --r-panel:16px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset, 0 24px 48px -32px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px rgba(18,227,176,.35), 0 0 28px -8px rgba(18,227,176,.45);
  --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--c-bg); color:var(--c-text);
  font-family:var(--font-sans); font-size:16.5px; line-height:1.9;
  letter-spacing:.01em; -webkit-font-smoothing:antialiased;
}
body::before{
  content:""; position:fixed; inset:0; pointer-events:none; z-index:0;
  background-image:linear-gradient(rgba(255,255,255,.024) 1px, transparent 1px),
                   linear-gradient(90deg, rgba(255,255,255,.024) 1px, transparent 1px);
  background-size:64px 64px;
}
body.nav-open{overflow:hidden}
img{max-width:100%; height:auto; display:block}
a{color:inherit; text-decoration:none; transition:color .18s ease-out}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid rgba(18,227,176,.75); outline-offset:2px; border-radius:6px}
p{margin:0 0 1.1em}
h1,h2,h3,h4{margin:0; color:var(--c-title); letter-spacing:-.01em; font-weight:700}
h1{font-size:clamp(30px,4.2vw,46px); line-height:1.25}
h2{font-size:clamp(24px,2.8vw,32px); line-height:1.35}
h3{font-size:20px; line-height:1.5; font-weight:600}
ul,ol{margin:0; padding:0; list-style:none}
button{font-family:inherit; cursor:pointer}
.mono{font-family:var(--font-mono); font-variant-numeric:tabular-nums}
.wrap{max-width:1220px; margin:0 auto; padding:0 clamp(16px,4vw,32px); position:relative; z-index:1}
.section{padding:clamp(56px,7vw,104px) 0; position:relative}
.section--elev{background:var(--c-bg-elev); border-top:1px solid var(--c-line); border-bottom:1px solid var(--c-line)}
.sec-head{max-width:760px; margin-bottom:clamp(28px,3.4vw,48px)}
.sec-head p{color:var(--c-muted); margin:.7em 0 0; font-size:16px}
.eyebrow{display:inline-flex; align-items:center; gap:8px; font-size:12.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--c-primary); margin-bottom:14px}
.eyebrow::before{content:""; width:22px; height:1px; background:var(--c-primary); display:block}

/* ============ header ============ */
.site-header{position:sticky; top:0; z-index:60; background:rgba(10,14,19,.88); backdrop-filter:blur(12px); border-bottom:1px solid var(--c-line)}
.site-header::after{content:""; display:block; height:1px; background:linear-gradient(90deg, transparent, rgba(18,227,176,.55), rgba(138,107,255,.4), transparent)}
.header-inner{display:flex; align-items:center; gap:20px; min-height:70px}
.logo{display:flex; align-items:center; gap:11px; flex:0 0 auto}
.logo-mark{width:38px; height:38px; border-radius:11px; display:grid; place-items:center; font-weight:800; font-size:15px; color:#04140F; background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep)); box-shadow:0 0 24px -8px rgba(18,227,176,.75)}
.logo-text b{display:block; color:var(--c-title); font-size:16px; line-height:1.2; letter-spacing:.01em}
.logo-text span{display:block; font-size:11.5px; color:var(--c-muted); line-height:1.4}
.nav-links{display:flex; align-items:center; gap:2px; margin-left:auto}
.nav-links a{position:relative; padding:10px 12px; font-size:15px; color:var(--c-text); border-radius:8px; white-space:nowrap}
.nav-links a:hover{color:var(--c-primary)}
.nav-links a.is-active{color:var(--c-title)}
.nav-links a.is-active::after{content:""; position:absolute; left:12px; right:12px; bottom:3px; height:2px; border-radius:2px; background:var(--c-primary); box-shadow:0 0 10px 2px rgba(18,227,176,.55)}
.nav-cta{min-height:42px; padding:0 18px; font-size:14.5px}
.nav-toggle{display:none; width:44px; height:44px; align-items:center; justify-content:center; border-radius:10px; border:1px solid var(--c-line-strong); background:rgba(23,31,42,.7); color:var(--c-title); font-size:17px}
.nav-backdrop{display:none}

/* ============ buttons ============ */
.btn{display:inline-flex; align-items:center; justify-content:center; gap:9px; min-height:46px; padding:0 22px; border-radius:var(--r-btn); font-size:15px; font-weight:600; border:1px solid transparent; transition:all .18s ease-out}
.btn-primary{background:var(--c-primary); color:#04140F; box-shadow:0 0 0 1px rgba(18,227,176,.4), 0 14px 32px -16px rgba(18,227,176,.85)}
.btn-primary:hover{filter:brightness(1.08); box-shadow:0 0 0 1px rgba(18,227,176,.75), 0 18px 36px -14px rgba(18,227,176,.9)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent; border-color:var(--c-line-strong); color:var(--c-primary)}
.btn-ghost:hover{border-color:rgba(18,227,176,.6); background:rgba(18,227,176,.08)}
.btn-warm{background:transparent; border-color:rgba(255,138,76,.45); color:#FFB794}
.btn-warm:hover{background:rgba(255,138,76,.1); border-color:rgba(255,138,76,.75)}
.btn-link{min-height:auto; padding:0; color:var(--c-primary); background:none; border:none; font-weight:600; font-size:15px}
.btn-link i{transition:transform .18s ease-out}
.btn-link:hover i{transform:translateX(3px)}
.btn-row{display:flex; flex-wrap:wrap; gap:14px; margin-top:26px}

/* ============ badges ============ */
.badge{display:inline-flex; align-items:center; gap:6px; padding:4px 12px; border-radius:var(--r-pill); font-size:12.5px; line-height:1.6; border:1px solid var(--c-line-strong); color:var(--c-muted)}
.badge-accent{color:#B9A9FF; border-color:rgba(138,107,255,.45); background:rgba(138,107,255,.12)}
.badge-primary{color:var(--c-primary); border-color:rgba(18,227,176,.4); background:rgba(18,227,176,.1)}
.badge-warm{color:#FFB794; border-color:rgba(255,138,76,.4); background:rgba(255,138,76,.1)}

/* ============ hero ============ */
.hero{position:relative; overflow:hidden; border-bottom:1px solid var(--c-line);
  background-image:linear-gradient(180deg, rgba(10,14,19,.82), rgba(10,14,19,.96)), url('/assets/images/backpic/back-1.webp');
  background-size:cover; background-position:center}
.hero::after{content:""; position:absolute; width:620px; height:620px; right:-200px; top:-220px; border-radius:50%;
  background:radial-gradient(circle, rgba(18,227,176,.16), transparent 66%); pointer-events:none}
.hero-inner{padding:clamp(40px,5vw,72px) 0 clamp(48px,6vw,84px); position:relative; z-index:1}
.crumbs{margin-bottom:22px}
.crumbs ol{display:flex; flex-wrap:wrap; align-items:center; gap:8px; font-size:13.5px; color:var(--c-muted)}
.crumbs li{display:flex; align-items:center; gap:8px}
.crumbs li::after{content:"/"; color:rgba(132,148,166,.6)}
.crumbs li:last-child::after{display:none}
.crumbs a:hover{color:var(--c-primary)}
.crumbs .current{color:var(--c-text)}
.hero h1{margin-bottom:18px}
.hero h1 em{font-style:normal; color:var(--c-primary)}
.hero-lead{max-width:640px; color:var(--c-text); font-size:17px; line-height:1.95; margin:0}
.hero-brand{display:inline-flex; align-items:center; gap:10px; margin-bottom:20px; padding:6px 14px; border-radius:var(--r-pill); border:1px solid var(--c-line-strong); background:rgba(18,24,33,.72); font-size:13px; color:var(--c-muted)}
.hero-brand b{color:var(--c-title); font-weight:600}
.hero-brand .dot{width:7px; height:7px; border-radius:50%; background:var(--c-primary); box-shadow:0 0 10px 2px rgba(18,227,176,.7)}
.hero-media{margin-top:8px; border-radius:var(--r-panel); overflow:hidden; border:1px solid var(--c-line); box-shadow:var(--shadow-card)}
.hero-media img{width:100%; aspect-ratio:16/11; object-fit:cover}
.anchor-pills{display:flex; flex-wrap:wrap; gap:10px; margin-top:clamp(28px,3.2vw,42px)}
.anchor-pills a{display:inline-flex; align-items:center; gap:8px; min-height:40px; padding:0 18px; border-radius:var(--r-pill); border:1px solid var(--c-line-strong); font-size:14px; color:var(--c-text); background:rgba(18,24,33,.6)}
.anchor-pills a:hover{border-color:rgba(18,227,176,.6); color:var(--c-primary)}
.anchor-pills a.is-current{background:rgba(18,227,176,.14); border-color:rgba(18,227,176,.55); color:var(--c-primary)}

/* ============ split blocks ============ */
.split-row{margin-bottom:clamp(44px,5vw,74px)}
.split-row:last-child{margin-bottom:0}
.split-text h2{margin-bottom:16px}
.split-text p{color:var(--c-text)}
.split-index{display:inline-flex; align-items:center; gap:10px; font-family:var(--font-mono); font-size:13px; color:var(--c-primary); letter-spacing:.06em; margin-bottom:14px}
.split-index span{width:28px; height:1px; background:rgba(18,227,176,.6); display:block}
.ticks{margin-top:18px; display:grid; gap:12px}
.ticks li{display:flex; gap:12px; align-items:flex-start; font-size:15.5px; line-height:1.8; color:var(--c-text)}
.ticks i{color:var(--c-primary); font-size:13px; margin-top:.55em; flex:0 0 auto}
.media-frame{border-radius:var(--r-card); overflow:hidden; border:1px solid var(--c-line); box-shadow:var(--shadow-card); transition:box-shadow .2s ease-out, transform .2s ease-out}
.media-frame img{width:100%; aspect-ratio:16/10; object-fit:cover; transition:transform .4s ease-out}
.media-frame:hover{transform:translateY(-2px); box-shadow:var(--shadow-hover)}
.media-frame:hover img{transform:scale(1.03)}
.media-cap{padding:14px 18px; background:var(--c-panel); font-size:13.5px; color:var(--c-muted); border-top:1px solid var(--c-line)}
@media (min-width:1024px){
  .split-row--reverse .split-text{order:2}
  .split-row--reverse .split-media{order:1}
}

/* ============ stat strip ============ */
.stat-strip{display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-top:clamp(32px,4vw,52px)}
.stat-item{background:var(--c-panel); border:1px solid var(--c-line); border-radius:var(--r-card); padding:22px 22px 20px; box-shadow:var(--shadow-card); transition:box-shadow .2s ease-out, transform .2s ease-out}
.stat-item:hover{transform:translateY(-2px); box-shadow:var(--shadow-hover)}
.stat-item i{font-size:19px; color:var(--c-primary)}
.stat-item b{display:block; margin:12px 0 6px; color:var(--c-title); font-size:16px}
.stat-item span{font-size:14px; color:var(--c-muted); line-height:1.75}

/* ============ steps ============ */
.steps{display:grid; grid-template-columns:repeat(4,1fr); gap:22px; margin-top:8px}
.step{position:relative; padding-top:26px}
.step::before{content:""; position:absolute; top:6px; left:0; width:100%; height:1px; background:var(--c-line-strong)}
.step::after{content:""; position:absolute; top:0; left:0; width:13px; height:13px; border-radius:50%; background:var(--c-bg-elev); border:2px solid var(--c-primary); box-shadow:0 0 14px 2px rgba(18,227,176,.55)}
.step b{display:block; color:var(--c-title); font-size:16.5px; margin-bottom:8px}
.step p{margin:0; font-size:14.5px; color:var(--c-muted); line-height:1.8}
.step .num{font-family:var(--font-mono); font-size:12.5px; color:var(--c-accent); display:block; margin-bottom:6px; letter-spacing:.08em}

/* ============ deliverable list ============ */
.deliver-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
.deliver-item{display:flex; gap:14px; align-items:flex-start; background:var(--c-bg-elev); border:1px solid var(--c-line); border-radius:var(--r-card); padding:20px 22px; transition:border-color .18s ease-out, box-shadow .18s ease-out, transform .18s ease-out}
.deliver-item:hover{border-color:rgba(18,227,176,.35); transform:translateY(-2px); box-shadow:var(--shadow-hover)}
.deliver-item i{width:38px; height:38px; flex:0 0 auto; display:grid; place-items:center; border-radius:10px; background:rgba(138,107,255,.14); color:#B9A9FF; font-size:15px}
.deliver-item b{display:block; color:var(--c-title); font-size:15.8px; margin-bottom:6px}
.deliver-item p{margin:0; font-size:14.3px; color:var(--c-muted); line-height:1.78}

/* ============ faq ============ */
.faq-list{max-width:920px; display:grid; gap:14px}
.faq-item{border:1px solid var(--c-line); border-radius:var(--r-card); background:var(--c-panel); overflow:hidden; transition:border-color .18s ease-out}
.faq-item[open]{border-color:rgba(18,227,176,.35)}
.faq-item summary{list-style:none; cursor:pointer; display:flex; align-items:center; gap:16px; min-height:60px; padding:16px 22px; color:var(--c-title); font-size:16px; font-weight:600}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+"; margin-left:auto; font-size:20px; color:var(--c-primary); line-height:1; transition:transform .2s ease-out}
.faq-item[open] summary::after{content:"–"}
.faq-item summary:hover{color:var(--c-primary)}
.faq-body{padding:0 22px 22px; border-left:2px solid var(--c-primary); margin:0 0 0 22px; animation:fade .22s ease-out}
.faq-body p{margin:.6em 0 0; font-size:15px; color:var(--c-text)}
@keyframes fade{from{opacity:0; transform:translateY(-4px)} to{opacity:1; transform:none}}

/* ============ related categories ============ */
.rel-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:18px}
.rel-card{display:block; background:var(--c-panel); border:1px solid var(--c-line); border-radius:var(--r-card); padding:22px; box-shadow:var(--shadow-card); transition:border-color .18s ease-out, transform .18s ease-out, box-shadow .18s ease-out}
.rel-card:hover{border-color:rgba(18,227,176,.4); transform:translateY(-2px); box-shadow:var(--shadow-hover)}
.rel-card b{display:block; color:var(--c-title); font-size:16.5px; margin:14px 0 8px}
.rel-card p{margin:0; font-size:14.2px; color:var(--c-muted); line-height:1.78}
.rel-card i{color:var(--c-primary); font-size:18px}

/* ============ cta ============ */
.cta-panel{display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:26px;
  background:linear-gradient(120deg, rgba(18,227,176,.09), rgba(138,107,255,.09));
  border:1px solid rgba(18,227,176,.32); border-radius:var(--r-panel); padding:clamp(26px,3.4vw,42px); box-shadow:var(--shadow-card)}
.cta-panel h2{margin-bottom:10px}
.cta-panel p{margin:0; color:var(--c-muted); max-width:620px; font-size:15.5px}
.cta-actions{display:flex; flex-wrap:wrap; gap:14px}

/* ============ footer ============ */
.site-footer{background:#080B10; border-top:1px solid var(--c-line); padding:clamp(48px,5vw,72px) 0 26px; position:relative; z-index:1}
.footer-brand{display:flex; align-items:center; gap:11px; margin-bottom:16px}
.footer-about{font-size:14.3px; color:var(--c-muted); line-height:1.85; margin:0; max-width:340px}
.footer-title{font-size:14.5px; color:var(--c-title); margin-bottom:16px; letter-spacing:.02em}
.footer-list{display:grid; gap:11px; font-size:14px; color:var(--c-muted)}
.footer-list a:hover{color:var(--c-primary)}
.footer-bottom{display:flex; flex-wrap:wrap; gap:12px; justify-content:space-between; align-items:center; margin-top:clamp(32px,4vw,48px); padding-top:22px; border-top:1px solid var(--c-line); font-size:13.5px; color:var(--c-muted)}

/* ============ responsive ============ */
@media (max-width:1023px){
  .nav-toggle{display:flex; margin-left:auto}
  .nav-cta{display:none}
  .nav-links{position:fixed; top:0; right:0; height:100vh; width:min(330px,86vw); margin:0; flex-direction:column; align-items:stretch; gap:4px;
    background:#0C1219; border-left:1px solid var(--c-line-strong); padding:92px 22px 34px; transform:translateX(101%); transition:transform .24s ease-out; z-index:70; overflow-y:auto}
  body.nav-open .nav-links{transform:none}
  .nav-links a{padding:14px 12px; font-size:16px; border-bottom:1px solid var(--c-line); border-radius:0}
  .nav-links a.is-active::after{left:0; right:auto; top:14px; bottom:14px; width:2px; height:auto}
  body.nav-open .nav-backdrop{display:block; position:fixed; inset:0; background:rgba(4,7,10,.7); z-index:65}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr); row-gap:32px}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .hero::after{display:none}
}
@media (max-width:767px){
  body{font-size:16px}
  .header-inner{min-height:64px}
  .stat-strip{grid-template-columns:1fr}
  .deliver-grid{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .btn{width:100%}
  .btn-row{gap:12px}
  .btn-row .btn-link{width:auto}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .faq-item summary{font-size:15.4px; padding:15px 18px}
  .faq-body{margin-left:18px; padding:0 18px 18px}
  .split-row{margin-bottom:44px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important; transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}
html{scroll-behavior:smooth}

/* roulang page: article */
:root{
  --c-bg:#0A0E13; --c-bg-elev:#121821; --c-panel:#171F2A;
  --c-line:rgba(255,255,255,.08); --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#12E3B0; --c-primary-deep:#0BA98A; --c-accent:#8A6BFF; --c-warm:#FF8A4C;
  --c-text:#CBD6E2; --c-title:#F2F6FA; --c-muted:#8494A6;
  --c-ok:#16C784; --c-warn:#FFB020; --c-err:#FF5A5F;
  --r-card:14px; --r-btn:10px; --r-pill:999px; --r-table:16px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset, 0 24px 48px -32px rgba(0,0,0,.9);
  --shadow-glow:0 0 0 1px rgba(18,227,176,.35), 0 0 28px -8px rgba(18,227,176,.45);
  --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --wrap:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--c-bg);color:var(--c-text);
  font-family:var(--font-sans);font-size:16px;line-height:1.8;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body.drawer-open{overflow:hidden}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--c-title);letter-spacing:-.01em;font-weight:700;text-align:left}
p{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-left:clamp(16px,4vw,32px);padding-right:clamp(16px,4vw,32px)}
.mono{font-family:var(--font-mono);letter-spacing:.02em}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:80;background:rgba(10,14,19,.88);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,rgba(18,227,176,.65),rgba(138,107,255,.5),transparent);
}
.header-inner{display:flex;align-items:center;gap:18px;height:68px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  font-family:var(--font-mono);font-weight:800;font-size:15px;color:#04211A;
  background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));
  box-shadow:0 0 0 1px rgba(18,227,176,.4),0 8px 24px -12px rgba(18,227,176,.9);
}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text b{font-size:16px;color:var(--c-title);letter-spacing:.02em}
.logo-text span{font-size:11.5px;color:var(--c-muted);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
  position:relative;display:inline-block;padding:10px 12px;border-radius:8px;
  font-size:14.5px;color:var(--c-muted);transition:color .18s ease-out,background .18s ease-out;
}
.nav-links a:hover{color:rgba(18,227,176,.85);background:rgba(255,255,255,.04)}
.nav-links a.is-active{color:var(--c-title)}
.nav-links a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;border-radius:2px;
  background:var(--c-primary);box-shadow:0 0 10px rgba(18,227,176,.85);
}
.header-cta{margin-left:10px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;border:1px solid var(--c-line-strong);
  background:rgba(255,255,255,.03);border-radius:10px;cursor:pointer;padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--c-text);transition:background .18s}
.nav-toggle:hover span{background:var(--c-primary)}
.drawer{position:fixed;inset:0;z-index:90;display:none}
.drawer::before{content:"";position:absolute;inset:0;background:rgba(4,7,10,.7);backdrop-filter:blur(4px)}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(86vw,340px);
  background:var(--c-bg-elev);border-left:1px solid var(--c-line-strong);
  padding:20px 20px 28px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-close{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--c-line-strong);
  background:transparent;color:var(--c-title);font-size:20px;cursor:pointer;line-height:1;
}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{
  padding:14px 4px;border-bottom:1px solid var(--c-line);color:var(--c-text);font-size:15px;
  display:flex;justify-content:space-between;align-items:center;min-height:44px;
}
.drawer-nav a:hover{color:var(--c-primary)}
.drawer-nav a.is-active{color:var(--c-primary)}
.drawer-cta{margin-top:18px}
body.drawer-open .drawer{display:block}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;transition:all .2s ease-out;white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#04211A;box-shadow:0 0 0 1px rgba(18,227,176,.35),0 12px 30px -16px rgba(18,227,176,.9)}
.btn-primary:hover{background:#2bf0c4;transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--c-line-strong);color:var(--c-primary)}
.btn-ghost:hover{border-color:rgba(18,227,176,.6);background:rgba(18,227,176,.08)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:14.5px;font-weight:600;
}
.link-arrow i{transition:transform .18s ease-out}
.link-arrow:hover i{transform:translateX(3px)}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12.5px;letter-spacing:.04em;
}
.badge-cat{background:rgba(138,107,255,.14);color:#B9A6FF;border:1px solid rgba(138,107,255,.3)}
.badge-member{background:rgba(18,227,176,.12);color:#4DF0C9;border:1px solid rgba(18,227,176,.28)}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(10,14,19,.86),rgba(10,14,19,.97)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--c-line);
}
.article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(600px 260px at 12% 0%,rgba(18,227,176,.10),transparent 70%),
             radial-gradient(520px 240px at 88% 10%,rgba(138,107,255,.10),transparent 72%);
}
.hero-inner{position:relative;z-index:2;padding-top:clamp(28px,4vw,44px);padding-bottom:clamp(36px,5vw,60px)}
.breadcrumb{margin-bottom:20px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted)}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(255,255,255,.22)}
.breadcrumb a{color:var(--c-muted);transition:color .18s}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb [aria-current="page"]{color:var(--c-text);max-width:60vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{
  font-size:clamp(28px,3.8vw,42px);line-height:1.28;letter-spacing:-.01em;
  max-width:900px;margin-bottom:18px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13.5px;color:var(--c-muted)}
.meta-row .meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-row .meta-item i{color:var(--c-primary);font-size:12.5px}
.meta-sep{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.22)}

/* ============ 主体布局 ============ */
.article-body{padding:clamp(40px,6vw,72px) 0 clamp(48px,6vw,80px)}
.article-layout{align-items:flex-start}
.prose-wrap{
  background:var(--c-bg-elev);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:clamp(22px,3.4vw,40px);box-shadow:var(--shadow-card);
}
.prose{max-width:800px;font-size:17px;line-height:1.92;color:var(--c-text)}
.prose>*:first-child{margin-top:0}
.prose p{margin:0 0 1.15em}
.prose h2{
  position:relative;margin:2.1em 0 .8em;padding-left:16px;
  font-size:clamp(21px,2.2vw,26px);line-height:1.42;
}
.prose h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-primary-deep));
  box-shadow:0 0 12px rgba(18,227,176,.55);
}
.prose h3{margin:1.7em 0 .6em;font-size:19px;line-height:1.5;color:var(--c-title)}
.prose h4{margin:1.4em 0 .5em;font-size:17px;color:var(--c-title)}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.4em}
.prose ul li{list-style:disc;margin:.5em 0}
.prose ol li{list-style:decimal;margin:.5em 0}
.prose blockquote{
  margin:1.5em 0;padding:14px 20px;background:var(--c-panel);
  border-left:3px solid var(--c-primary);border-radius:0 12px 12px 0;color:var(--c-text);
}
.prose img{border-radius:12px;margin:1.5em auto}
.prose a{color:var(--c-primary);border-bottom:1px solid rgba(18,227,176,.35)}
.prose a:hover{border-bottom-color:var(--c-primary)}
.prose strong{color:var(--c-title)}
.prose code{
  font-family:var(--font-mono);font-size:.92em;background:var(--c-panel);
  padding:2px 6px;border-radius:6px;color:#7FF0D4;
}
.prose pre{
  background:#0D131B;border:1px solid var(--c-line);border-radius:12px;
  padding:16px 18px;overflow-x:auto;margin:1.5em 0;
}
.prose pre code{background:none;padding:0;color:#9FE8D6}
.prose table{width:100%;border-collapse:collapse;font-size:15px;margin:1.5em 0;display:block;overflow-x:auto;border-radius:12px}
.prose th,.prose td{border:1px solid var(--c-line);padding:10px 14px;text-align:left}
.prose th{background:var(--c-panel);color:var(--c-title);font-weight:600}
.prose hr{border:0;border-top:1px solid var(--c-line);margin:2em 0}

/* 空态 */
.empty-state{
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:16px;
  padding:clamp(48px,8vw,88px) 24px;background:var(--c-panel);
  border:1px dashed var(--c-line-strong);border-radius:16px;
}
.empty-state i{font-size:34px;color:var(--c-muted)}
.empty-state h2{font-size:21px}
.empty-state p{color:var(--c-muted);font-size:14.5px;max-width:420px}

/* 标签行 / 操作行 */
.article-foot{margin-top:26px;display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  font-size:13px;color:var(--c-muted);background:rgba(255,255,255,.04);border:1px solid var(--c-line);
  transition:all .18s ease-out;
}
.tag:hover{color:var(--c-primary);border-color:rgba(18,227,176,.4)}
.action-row{display:flex;gap:10px;flex-wrap:wrap}
.mini-btn{
  display:inline-flex;align-items:center;gap:7px;height:40px;padding:0 16px;border-radius:var(--r-btn);
  border:1px solid var(--c-line-strong);background:transparent;color:var(--c-text);font-size:13.5px;
  cursor:pointer;transition:all .18s ease-out;
}
.mini-btn:hover{border-color:rgba(18,227,176,.5);color:var(--c-primary)}

/* 返回入口 */
.back-links{
  margin-top:26px;padding-top:22px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:22px;align-items:center;
}

/* ============ 侧栏 ============ */
.article-side{margin-top:0}
.side-sticky{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
.side-card{
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:20px 20px 22px;box-shadow:var(--shadow-card);
}
.side-title{
  font-size:14px;letter-spacing:.08em;color:var(--c-muted);font-weight:600;
  text-transform:uppercase;margin-bottom:14px;display:flex;align-items:center;gap:8px;
}
.side-title::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-primary);box-shadow:0 0 10px rgba(18,227,176,.9)}
.toc-list{display:flex;flex-direction:column;gap:2px;counter-reset:toc}
.toc-list a{
  display:block;padding:9px 10px 9px 12px;border-left:2px solid transparent;border-radius:0 8px 8px 0;
  font-size:14px;color:var(--c-muted);line-height:1.6;transition:all .18s ease-out;
}
.toc-list a:hover{color:var(--c-text);background:rgba(255,255,255,.04)}
.toc-list a.is-current{color:var(--c-title);border-left-color:var(--c-primary);background:rgba(18,227,176,.08)}
.side-links{display:flex;flex-direction:column}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 2px;font-size:14px;color:var(--c-text);border-bottom:1px solid var(--c-line);
  transition:color .18s ease-out;min-height:44px;
}
.side-links a:last-child{border-bottom:0}
.side-links a:hover{color:var(--c-primary)}
.side-links a i{font-size:12px;color:var(--c-muted);transition:transform .18s ease-out}
.side-links a:hover i{transform:translateX(3px);color:var(--c-primary)}
.side-cta{background:linear-gradient(160deg,rgba(18,227,176,.10),rgba(138,107,255,.08)),var(--c-panel)}
.side-cta p{font-size:14px;color:var(--c-text);margin-bottom:14px;line-height:1.75}
.toc-mobile{display:none;margin-bottom:18px;background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--r-card);padding:6px 16px}
.toc-mobile summary{
  cursor:pointer;list-style:none;padding:14px 0;font-size:14.5px;color:var(--c-title);
  display:flex;align-items:center;justify-content:space-between;min-height:48px;
}
.toc-mobile summary::-webkit-details-marker{display:none}
.toc-mobile summary::after{content:"+";font-size:18px;color:var(--c-primary);line-height:1}
.toc-mobile[open] summary::after{content:"–"}
.toc-mobile .toc-list{padding-bottom:14px}

/* ============ 板块通用 ============ */
.section{padding:clamp(48px,7vw,96px) 0}
.section-dark{background:var(--c-bg-elev);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.sec-head{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;margin-bottom:clamp(26px,3vw,40px)}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.4}
.sec-head p{color:var(--c-muted);font-size:14.5px;margin-top:8px;max-width:640px}

/* 卡片 */
.card{
  height:100%;display:flex;flex-direction:column;background:var(--c-panel);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-2px);border-color:rgba(18,227,176,.35);box-shadow:var(--shadow-card),var(--shadow-glow)}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0D131B}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17.5px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card:hover h3{color:var(--c-primary)}
.card-body p{font-size:14px;color:var(--c-muted);line-height:1.75;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--c-muted);
}

/* ============ CTA ============ */
.cta-panel{
  position:relative;overflow:hidden;border-radius:16px;border:1px solid rgba(18,227,176,.32);
  background:linear-gradient(120deg,rgba(18,227,176,.12),rgba(138,107,255,.10)),var(--c-panel);
  padding:clamp(26px,4vw,48px);
  display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;
  box-shadow:0 0 44px -26px rgba(18,227,176,.8);
}
.cta-panel h2{font-size:clamp(21px,2.4vw,28px);line-height:1.45;margin-bottom:10px}
.cta-panel p{color:var(--c-text);font-size:14.5px;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{background:#080B10;border-top:1px solid var(--c-line);padding:clamp(44px,5vw,72px) 0 0;margin-top:0}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-title{font-size:13.5px;letter-spacing:.1em;color:var(--c-muted);margin-bottom:16px;font-weight:600}
.footer-about{font-size:14px;color:var(--c-muted);line-height:1.85;max-width:420px}
.footer-list{display:flex;flex-direction:column;gap:11px}
.footer-list a,.footer-list span{font-size:14px;color:var(--c-muted);transition:color .18s ease-out}
.footer-list a:hover{color:var(--c-primary)}
.footer-bottom{
  margin-top:clamp(32px,4vw,52px);padding:20px 0;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13px;color:var(--c-muted);
}
.grid-margin-y{margin-top:-.9375rem}

@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
  .card:hover{transform:none}
}

@media screen and (max-width:1023px){
  .nav-links{display:none}
  .header-cta{display:none}
  .nav-toggle{display:flex}
  .side-sticky{position:static}
  .article-side{margin-top:24px}
  .toc-mobile{display:block}
}
@media screen and (max-width:639px){
  .header-inner{height:62px;gap:12px}
  .logo-text span{display:none}
  .article-title{font-size:26px}
  .breadcrumb [aria-current="page"]{max-width:100%;white-space:normal}
  .article-body{padding-top:28px}
  .prose{font-size:16px;line-height:1.88}
  .prose-wrap{padding:20px 16px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .back-links{gap:14px}
}

/* roulang page: category3 */
:root{
  --c-bg:#0A0E13;
  --c-bg-elev:#121821;
  --c-panel:#171F2A;
  --c-line:rgba(255,255,255,.08);
  --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#12E3B0;
  --c-primary-deep:#0BA98A;
  --c-accent:#8A6BFF;
  --c-warm:#FF8A4C;
  --c-text:#CBD6E2;
  --c-title:#F2F6FA;
  --c-muted:#8494A6;
  --c-ok:#16C784;
  --c-warn:#FFB020;
  --c-err:#FF5A5F;
  --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono",monospace;
  --r-card:14px;
  --r-btn:10px;
  --r-badge:999px;
  --r-table:16px;
  --sh-card:inset 0 1px 0 rgba(255,255,255,.05),0 24px 48px -32px rgba(0,0,0,.9);
  --sh-hover:0 0 0 1px rgba(18,227,176,.35),0 0 28px -8px rgba(18,227,176,.45);
  --gap:clamp(16px,4vw,32px);
  --sec:clamp(64px,8vw,120px);
  --maxw:1220px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body.is-locked{overflow:hidden}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
h1,h2,h3,h4{margin:0;color:var(--c-title);font-weight:700;letter-spacing:-.01em;line-height:1.35}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding-left:var(--gap);padding-right:var(--gap)}
.section{padding-top:var(--sec);padding-bottom:var(--sec);position:relative}
.section--tight{padding-top:clamp(44px,5vw,72px);padding-bottom:clamp(44px,5vw,72px)}
.section--panel{background:var(--c-bg-elev);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.grid-x{display:flex;flex-wrap:wrap}
.grid-margin-x{margin-left:-14px;margin-right:-14px}
.grid-margin-x>.cell{padding-left:14px;padding-right:14px}
.grid-margin-y{margin-top:-14px}
.grid-margin-y>.cell{padding-top:14px;padding-bottom:14px}
.cell{flex:1 1 auto;min-width:0}
.small-12{flex:0 0 100%;max-width:100%}
@media screen and (min-width:640px){
  .medium-6{flex:0 0 50%;max-width:50%}
  .medium-5{flex:0 0 41.6667%;max-width:41.6667%}
  .medium-7{flex:0 0 58.3333%;max-width:58.3333%}
  .medium-4{flex:0 0 33.3333%;max-width:33.3333%}
  .medium-8{flex:0 0 66.6667%;max-width:66.6667%}
}
@media screen and (min-width:1024px){
  .large-3{flex:0 0 25%;max-width:25%}
  .large-4{flex:0 0 33.3333%;max-width:33.3333%}
  .large-5{flex:0 0 41.6667%;max-width:41.6667%}
  .large-6{flex:0 0 50%;max-width:50%}
  .large-7{flex:0 0 58.3333%;max-width:58.3333%}
  .large-8{flex:0 0 66.6667%;max-width:66.6667%}
  .large-2{flex:0 0 16.6667%;max-width:16.6667%}
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,14,19,.88);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,rgba(18,227,176,0),rgba(18,227,176,.55),rgba(138,107,255,.35),rgba(18,227,176,0));
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:18px;min-height:68px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));
  color:#04120E;font-weight:800;font-size:15px;letter-spacing:.02em;
  box-shadow:0 0 22px -8px rgba(18,227,176,.8);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text b{color:var(--c-title);font-size:16px;letter-spacing:.02em}
.logo-text span{color:var(--c-muted);font-size:11px;letter-spacing:.14em}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;
  height:44px;padding:0 13px;font-size:14.5px;color:var(--c-text);
  border-radius:8px;transition:color .18s ease-out,background .18s ease-out;
}
.nav-links a:hover{color:rgba(18,227,176,.92);background:rgba(255,255,255,.03)}
.nav-links a.is-active{color:var(--c-title)}
.nav-links a.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:5px;height:2px;border-radius:2px;
  background:var(--c-primary);box-shadow:0 0 10px 1px rgba(18,227,176,.75);
}
.header-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  background:rgba(255,255,255,.04);border:1px solid var(--c-line-strong);color:var(--c-title);
}
.nav-drawer{
  display:none;border-top:1px solid var(--c-line);background:rgba(10,14,19,.98);
  padding:10px 0 20px;
}
.nav-drawer.is-open{display:block}
.nav-drawer .wrap{display:flex;flex-direction:column}
.nav-drawer a{
  display:flex;align-items:center;min-height:48px;padding:0 4px;
  color:var(--c-text);font-size:15px;border-bottom:1px solid var(--c-line);
}
.nav-drawer a.is-active{color:var(--c-primary)}
.nav-drawer .drawer-cta{margin-top:18px;border-bottom:0}

/* ---------- buttons ---------- */
.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;border:1px solid transparent;
  transition:background .18s ease-out,color .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.btn-primary{
  background:var(--c-primary);color:#05140F;
  box-shadow:0 0 24px -10px rgba(18,227,176,.9);
}
.btn-primary:hover{background:#2BEDBF;box-shadow:0 0 0 1px rgba(18,227,176,.5),0 0 30px -6px rgba(18,227,176,.65);transform:translateY(-1px)}
.btn-ghost{
  background:transparent;color:var(--c-primary);border-color:var(--c-line-strong);
}
.btn-ghost:hover{border-color:rgba(18,227,176,.55);box-shadow:0 0 22px -10px rgba(18,227,176,.7);color:#3BEFC4}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);
  font-size:14.5px;font-weight:600;
}
.link-arrow i{transition:transform .18s ease-out}
.link-arrow:hover i{transform:translateX(3px)}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--c-line);
  background-image:linear-gradient(180deg,rgba(10,14,19,.82),rgba(10,14,19,.94)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;opacity:.5;
}
.page-hero .wrap{position:relative;z-index:2}
.breadcrumb{padding:20px 0 0}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--c-muted)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(255,255,255,.22)}
.breadcrumb a{color:var(--c-muted)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb [aria-current]{color:var(--c-text)}
.hero-body{padding:34px 0 clamp(56px,7vw,96px)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 14px;border-radius:var(--r-badge);
  background:rgba(138,107,255,.12);border:1px solid rgba(138,107,255,.4);
  color:#BCA9FF;font-size:12.5px;letter-spacing:.08em;
}
.hero-title{margin-top:22px;font-size:clamp(30px,4.2vw,46px);line-height:1.25;max-width:19em}
.hero-title em{font-style:normal;color:var(--c-primary)}
.hero-sub{margin-top:16px;max-width:38em;color:var(--c-text);font-size:17px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  display:inline-flex;align-items:center;gap:7px;min-height:32px;padding:0 13px;
  border-radius:var(--r-badge);border:1px solid var(--c-line-strong);
  background:rgba(255,255,255,.03);color:var(--c-text);font-size:13px;
}
.chip i{color:var(--c-primary);font-size:12px}
.hero-figure{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line-strong);
  box-shadow:var(--sh-card);background:var(--c-panel);
}
.hero-figure img{aspect-ratio:16/10;object-fit:cover;width:100%}
.hero-figure figcaption{padding:12px 16px;font-size:13px;color:var(--c-muted);border-top:1px solid var(--c-line)}

/* ---------- anchor pills ---------- */
.anchor-bar{
  position:sticky;top:68px;z-index:40;
  background:rgba(10,14,19,.92);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);
}
.anchor-bar .wrap{display:flex;gap:10px;overflow-x:auto;padding-top:12px;padding-bottom:12px;scrollbar-width:none}
.anchor-bar .wrap::-webkit-scrollbar{display:none}
.anchor-bar a{
  flex:0 0 auto;display:inline-flex;align-items:center;min-height:38px;padding:0 16px;
  border-radius:var(--r-badge);border:1px solid var(--c-line-strong);
  font-size:14px;color:var(--c-text);white-space:nowrap;
  transition:color .18s ease-out,border-color .18s ease-out,background .18s ease-out;
}
.anchor-bar a:hover{color:var(--c-primary);border-color:rgba(18,227,176,.5)}
.anchor-bar a.is-active{
  background:var(--c-primary);color:#05140F;border-color:transparent;font-weight:600;
}

/* ---------- section heading ---------- */
.sec-head{max-width:44em;margin-bottom:clamp(30px,4vw,52px)}
.sec-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.16em;color:var(--c-primary);text-transform:uppercase;
  margin-bottom:14px;
}
.sec-tag::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--c-primary);box-shadow:0 0 10px 1px rgba(18,227,176,.6)}
.sec-title{font-size:clamp(24px,2.8vw,32px);line-height:1.35}
.sec-desc{margin-top:14px;color:var(--c-muted);font-size:16px}

/* ---------- timeline ---------- */
.timeline{position:relative;padding-left:clamp(24px,4vw,44px)}
.timeline::before{
  content:"";position:absolute;left:12px;top:8px;bottom:8px;width:2px;border-radius:2px;
  background:linear-gradient(180deg,rgba(18,227,176,.7),rgba(138,107,255,.5),rgba(18,227,176,.12));
}
.tl-step{position:relative;padding-bottom:clamp(30px,4vw,46px)}
.tl-step:last-child{padding-bottom:0}
.tl-step::before{
  content:"";position:absolute;left:calc(-1 * clamp(24px,4vw,44px) + 6px);top:14px;
  width:14px;height:14px;border-radius:50%;
  background:var(--c-bg);border:2px solid var(--c-primary);
  box-shadow:0 0 14px 2px rgba(18,227,176,.7);
}
.tl-card{
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:clamp(20px,2.4vw,28px);box-shadow:var(--sh-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.tl-step:hover .tl-card{transform:translateY(-2px);border-color:rgba(18,227,176,.28);box-shadow:var(--sh-card),var(--sh-hover)}
.tl-num{
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.16em;color:var(--c-primary);
}
.tl-title{margin-top:8px;font-size:20px;line-height:1.5}
.tl-text{margin-top:12px;color:var(--c-text);font-size:15.5px}
.tl-list{margin-top:16px;display:grid;gap:9px}
.tl-list li{display:flex;gap:10px;font-size:14.5px;color:var(--c-muted)}
.tl-list i{color:var(--c-primary);margin-top:6px;font-size:11px}
.tl-media{margin-top:18px;border-radius:12px;overflow:hidden;border:1px solid var(--c-line-strong)}
.tl-media img{width:100%;aspect-ratio:16/8;object-fit:cover}
.tl-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  min-height:26px;padding:0 12px;border-radius:var(--r-badge);
  font-size:12.5px;letter-spacing:.02em;
}
.badge-accent{background:rgba(138,107,255,.14);border:1px solid rgba(138,107,255,.42);color:#BCA9FF}
.badge-primary{background:rgba(18,227,176,.12);border:1px solid rgba(18,227,176,.42);color:#5BF0C9}
.badge-warm{background:rgba(255,138,76,.12);border:1px solid rgba(255,138,76,.42);color:#FFB08A}
.badge-muted{background:rgba(255,255,255,.04);border:1px solid var(--c-line-strong);color:var(--c-muted)}

/* ---------- cards ---------- */
.card{
  display:flex;flex-direction:column;height:100%;
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-2px);border-color:rgba(18,227,176,.3);box-shadow:var(--sh-card),var(--sh-hover)}
.card-thumb{position:relative;overflow:hidden;background:#0D131B}
.card-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease-out}
.card:hover .card-thumb img{transform:scale(1.03)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.card-title{font-size:17.5px;line-height:1.55;color:var(--c-title);transition:color .18s ease-out}
.card:hover .card-title{color:var(--c-primary)}
.card-text{font-size:14.5px;color:var(--c-muted);line-height:1.8}
.card-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--c-muted);
}

/* ---------- feature list (two column text blocks) ---------- */
.split-blocks{display:grid;gap:0}
.split-item{padding:clamp(22px,3vw,32px) 0;border-top:1px solid var(--c-line)}
.split-item:first-child{border-top:0;padding-top:0}
.split-item h3{font-size:19px;display:flex;align-items:center;gap:10px}
.split-item h3 i{color:var(--c-primary);font-size:16px}
.split-item p{margin-top:10px;color:var(--c-text);font-size:15.5px}
@media screen and (min-width:1024px){
  .split-blocks{grid-template-columns:1fr 1fr;column-gap:clamp(32px,5vw,64px)}
  .split-item{padding:0 0 0 clamp(18px,2vw,26px);border-top:0;border-left:1px solid var(--c-line);min-height:100%}
  .split-item:first-child{padding-top:0}
}

/* ---------- compact list cards (course materials) ---------- */
.mini-list{display:grid;gap:12px}
.mini-item{
  display:flex;align-items:flex-start;gap:14px;
  padding:16px 18px;border-radius:12px;
  background:var(--c-bg-elev);border:1px solid var(--c-line);
  transition:border-color .18s ease-out,background .18s ease-out,transform .18s ease-out;
}
.mini-item:hover{border-color:rgba(18,227,176,.32);background:var(--c-panel);transform:translateY(-2px)}
.mini-ico{
  width:40px;height:40px;flex:0 0 auto;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(18,227,176,.1);border:1px solid rgba(18,227,176,.32);color:var(--c-primary);
  font-size:15px;
}
.mini-item h3{font-size:15.5px;line-height:1.5}
.mini-item p{margin-top:4px;font-size:14px;color:var(--c-muted);line-height:1.75}

/* ---------- stat strip ---------- */
.stat-strip{
  display:grid;gap:14px;grid-template-columns:repeat(2,1fr);
  padding:clamp(20px,3vw,26px);border-radius:var(--r-table);
  background:var(--c-bg-elev);border:1px solid var(--c-line);
}
@media screen and (min-width:1024px){.stat-strip{grid-template-columns:repeat(4,1fr)}}
.stat{padding-left:16px;border-left:2px solid rgba(18,227,176,.4)}
.stat b{display:block;font-family:var(--font-mono);font-size:24px;color:var(--c-title);letter-spacing:.02em}
.stat span{display:block;margin-top:4px;font-size:13.5px;color:var(--c-muted)}

/* ---------- faq ---------- */
.faq{display:grid;gap:12px}
.faq details{
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:12px;
  overflow:hidden;transition:border-color .18s ease-out,background .18s ease-out;
}
.faq details[open]{border-color:rgba(18,227,176,.34)}
.faq details:hover{border-color:var(--c-line-strong)}
.faq summary{
  list-style:none;cursor:pointer;position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;
  color:var(--c-title);font-size:16px;font-weight:600;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";flex:0 0 auto;font-size:20px;line-height:1;color:var(--c-primary);
  transition:transform .18s ease-out;
}
.faq details[open] summary::after{content:"−"}
.faq .faq-body{
  position:relative;padding:2px 20px 20px 22px;color:var(--c-text);font-size:15px;
  border-left:2px solid var(--c-primary);
  animation:faqIn .22s ease-out both;
}
@keyframes faqIn{from{opacity:0;transform:translateY(-3px)}to{opacity:1;transform:none}}

/* ---------- cta ---------- */
.cta-panel{
  position:relative;overflow:hidden;
  border-radius:var(--r-table);
  background:linear-gradient(120deg,rgba(18,227,176,.1),rgba(138,107,255,.08) 60%,rgba(10,14,19,.2));
  border:1px solid rgba(18,227,176,.32);
  box-shadow:0 0 40px -22px rgba(18,227,176,.65);
  padding:clamp(26px,4vw,44px);
}
.cta-panel .grid-x{align-items:center}
.cta-title{font-size:clamp(21px,2.4vw,27px)}
.cta-text{margin-top:10px;color:var(--c-text);font-size:15.5px;max-width:42em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:4px}

/* ---------- related categories ---------- */
.rel-grid{display:grid;gap:12px;grid-template-columns:1fr}
@media screen and (min-width:640px){.rel-grid{grid-template-columns:repeat(2,1fr)}}
@media screen and (min-width:1024px){.rel-grid{grid-template-columns:repeat(4,1fr)}}
.rel-card{
  display:flex;flex-direction:column;gap:8px;height:100%;
  padding:20px;border-radius:12px;background:var(--c-bg-elev);
  border:1px solid var(--c-line);transition:border-color .18s ease-out,transform .18s ease-out,background .18s ease-out;
}
.rel-card:hover{border-color:rgba(18,227,176,.4);background:var(--c-panel);transform:translateY(-2px)}
.rel-card span{font-size:12.5px;color:var(--c-muted);letter-spacing:.1em}
.rel-card b{color:var(--c-title);font-size:16px}
.rel-card i{color:var(--c-primary);font-size:13px}

/* ---------- footer ---------- */
.site-footer{
  margin-top:var(--sec);
  background:var(--c-bg-elev);
  border-top:1px solid var(--c-line);
  padding-top:clamp(44px,5vw,72px);
}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-about{margin-top:16px;font-size:14.5px;color:var(--c-muted);line-height:1.85;max-width:34em}
.footer-title{font-size:15px;color:var(--c-title);margin-bottom:14px}
.footer-list{display:flex;flex-direction:column;gap:10px;font-size:14.5px;color:var(--c-muted)}
.footer-list a{color:var(--c-muted);transition:color .18s ease-out}
.footer-list a:hover{color:var(--c-primary)}
.footer-bottom{
  margin-top:clamp(32px,4vw,48px);
  padding:20px 0 26px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13.5px;color:var(--c-muted);
}

/* ---------- responsive ---------- */
@media screen and (max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .header-actions .btn{display:none}
  .anchor-bar{top:68px}
}
@media screen and (max-width:639px){
  body{font-size:15.5px;line-height:1.85}
  .header-inner{min-height:62px}
  .logo-text span{display:none}
  .anchor-bar{position:static}
  .timeline{padding-left:26px}
  .timeline::before{left:9px}
  .tl-step::before{left:-21px;width:12px;height:12px}
  .hero-cta .btn{width:100%}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .card:hover,.tl-step:hover .tl-card,.rel-card:hover,.mini-item:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --c-bg:#0A0E13;
  --c-bg-elev:#121821;
  --c-panel:#171F2A;
  --c-line:rgba(255,255,255,.08);
  --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#12E3B0;
  --c-primary-deep:#0BA98A;
  --c-accent:#8A6BFF;
  --c-warm:#FF8A4C;
  --c-text:#CBD6E2;
  --c-title:#F2F6FA;
  --c-muted:#8494A6;
  --c-ok:#16C784;
  --c-warn:#FFB020;
  --c-err:#FF5A5F;
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --r-table:16px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,.05), 0 24px 48px -32px rgba(0,0,0,.9);
  --shadow-glow:0 0 0 1px rgba(18,227,176,.35), 0 0 28px -8px rgba(18,227,176,.45);
  --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --gap-sec:clamp(64px,8vw,120px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  letter-spacing:.01em;
  text-align:left;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--c-primary);text-decoration:none;transition:color .18s ease-out,background-color .18s ease-out,border-color .18s ease-out}
a:hover{color:var(--c-title)}
h1,h2,h3,h4{color:var(--c-title);margin:0;letter-spacing:-.01em;text-align:left}
p{margin:0 0 1.1em}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
input,textarea,select{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.mono{font-family:var(--font-mono)}
.wrap{max-width:1240px;margin:0 auto;padding-left:clamp(16px,4vw,32px);padding-right:clamp(16px,4vw,32px)}
.section{padding:var(--gap-sec) 0}
.section--tight{padding:clamp(48px,6vw,84px) 0}
.section--panel{background:var(--c-bg-elev);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.sec-head{max-width:780px;margin-bottom:clamp(28px,4vw,44px)}
.sec-head--wide{max-width:920px}
.sec-kicker{
  display:inline-block;
  font-size:12.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-primary);
  margin:0 0 14px;
  font-family:var(--font-mono);
}
.sec-head h2{font-size:clamp(24px,2.8vw,32px);line-height:1.35;margin-bottom:14px}
.sec-head p{color:var(--c-muted);font-size:15.5px;line-height:1.85;margin:0}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(10,14,19,.88);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
}
.site-header::after{
  content:"";
  display:block;
  height:1px;
  background:linear-gradient(90deg,rgba(18,227,176,.7),rgba(138,107,255,.55),rgba(18,227,176,0));
  opacity:.85;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:70px}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));
  color:#04140F;font-weight:800;font-size:16px;letter-spacing:.02em;
  box-shadow:0 0 22px -10px rgba(18,227,176,.85);
}
.brand-text{display:flex;flex-direction:column;line-height:1.28}
.brand-text b{color:var(--c-title);font-size:16.5px;letter-spacing:.01em}
.brand-text span{color:var(--c-muted);font-size:12px;letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{
  position:relative;
  padding:10px 12px;
  border-radius:8px;
  color:var(--c-text);
  font-size:15px;
  white-space:nowrap;
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-links a:hover{color:var(--c-primary);background:rgba(18,227,176,.07)}
.nav-links a.is-active{color:var(--c-title)}
.nav-links a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--c-primary);box-shadow:0 0 10px rgba(18,227,176,.85);
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:10px;
  background:transparent;border:1px solid var(--c-line-strong);
  color:var(--c-title);cursor:pointer;
  transition:border-color .18s ease-out,color .18s ease-out,background-color .18s ease-out;
}
.nav-toggle:hover{border-color:rgba(18,227,176,.6);color:var(--c-primary);background:rgba(18,227,176,.08)}
.drawer{
  display:none;
  position:fixed;left:0;right:0;top:71px;bottom:0;
  background:rgba(10,14,19,.98);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  padding:22px clamp(16px,4vw,32px) 40px;
  overflow-y:auto;
  z-index:79;
}
.drawer.is-open{display:block}
.drawer-nav{display:flex;flex-direction:column;margin-bottom:22px}
.drawer-nav a{
  display:flex;align-items:center;min-height:52px;
  color:var(--c-text);font-size:16px;
  border-bottom:1px solid var(--c-line);
  padding:0 4px;
}
.drawer-nav a.is-active{color:var(--c-primary)}
.drawer-nav a:hover{color:var(--c-primary)}
body.no-scroll{overflow:hidden}

/* ---------- 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:600;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.btn-primary{background:var(--c-primary);color:#04140F;box-shadow:0 0 22px -12px rgba(18,227,176,.95)}
.btn-primary:hover{background:#31EDBF;color:#04140F;box-shadow:0 0 0 1px rgba(18,227,176,.6),0 0 28px -10px rgba(18,227,176,.8)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--c-line-strong);color:var(--c-primary)}
.btn-ghost:hover{border-color:rgba(18,227,176,.65);color:var(--c-title);background:rgba(18,227,176,.08)}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--c-primary);font-size:15px;font-weight:600;min-height:44px;
}
.btn-link i{transition:transform .18s ease-out}
.btn-link:hover i{transform:translateX(3px)}
.btn-block{width:100%}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- Breadcrumb ---------- */
.breadcrumb{margin-bottom:18px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--c-muted)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:rgba(255,255,255,.22)}
.breadcrumb a{color:var(--c-muted)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb [aria-current="page"]{color:var(--c-text)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--c-line);padding:clamp(44px,6vw,84px) 0 clamp(48px,6vw,86px)}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.26}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(880px 420px at 82% 14%, rgba(18,227,176,.16), transparent 62%),
    radial-gradient(620px 380px at 8% 88%, rgba(138,107,255,.14), transparent 66%),
    linear-gradient(180deg, rgba(10,14,19,.6), rgba(10,14,19,.97));
}
.hero-inner{position:relative;z-index:2}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid rgba(138,107,255,.4);
  background:rgba(138,107,255,.12);
  color:#C9BCFF;font-size:12.5px;letter-spacing:.08em;
  margin:0 0 18px;
}
.hero h1{font-size:clamp(30px,4.2vw,46px);line-height:1.25;margin-bottom:18px;max-width:19em}
.hero-sub{font-size:17px;line-height:1.8;color:var(--c-text);max-width:34em;margin:0 0 26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:10px}
.hero-metrics li{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border-radius:var(--r-pill);
  background:var(--c-panel);border:1px solid var(--c-line);
  font-size:13.5px;color:var(--c-text);
}
.hero-metrics i{color:var(--c-primary);font-size:12px}
.hero-figure{
  margin:0;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--c-line-strong);
  box-shadow:var(--shadow-card);
}
.hero-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* ---------- Anchor bar ---------- */
.anchor-bar{position:sticky;top:71px;z-index:60;background:rgba(18,24,33,.94);border-bottom:1px solid var(--c-line)}
.anchor-inner{display:flex;align-items:center;gap:10px;padding-top:12px;padding-bottom:12px;overflow-x:auto}
.anchor-label{font-size:12.5px;color:var(--c-muted);letter-spacing:.1em;white-space:nowrap;flex:0 0 auto;font-family:var(--font-mono)}
.pill{
  display:inline-flex;align-items:center;min-height:36px;padding:0 16px;
  border-radius:var(--r-pill);border:1px solid var(--c-line-strong);
  color:var(--c-text);font-size:14px;white-space:nowrap;flex:0 0 auto;
  transition:all .18s ease-out;
}
.pill:hover{border-color:rgba(18,227,176,.55);color:var(--c-primary);background:rgba(18,227,176,.07)}
.pill.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#04140F;font-weight:600}

/* ---------- Matrix table ---------- */
.matrix-wrap{
  border:1px solid var(--c-line);border-radius:var(--r-table);
  background:var(--c-bg-elev);overflow:hidden;box-shadow:var(--shadow-card);
}
.matrix-scroll{overflow-x:auto}
table.matrix{width:100%;min-width:760px;border-collapse:collapse;font-size:15px}
table.matrix caption{
  caption-side:top;text-align:left;
  padding:22px 24px 12px;color:var(--c-muted);font-size:14px;line-height:1.7;
}
table.matrix th,table.matrix td{
  padding:15px 20px;border-bottom:1px solid var(--c-line);text-align:left;vertical-align:middle;
}
table.matrix thead th{
  position:sticky;top:0;z-index:2;
  background:var(--c-panel);color:var(--c-title);
  font-size:14.5px;font-weight:600;white-space:nowrap;
}
table.matrix tbody th{
  position:sticky;left:0;z-index:1;
  background:#141B25;color:var(--c-title);font-weight:500;white-space:nowrap;
}
table.matrix thead th:first-child{left:0;z-index:4}
table.matrix tbody tr:hover th,table.matrix tbody tr:hover td{background:var(--c-panel)}
table.matrix tbody tr:last-child th,table.matrix tbody tr:last-child td{border-bottom:0}
table.matrix .col-hl{background:rgba(18,227,176,.07);box-shadow:inset 1px 0 0 rgba(18,227,176,.3),inset -1px 0 0 rgba(18,227,176,.3)}
table.matrix tbody tr:hover .col-hl{background:rgba(18,227,176,.11)}
.chip-yes{color:var(--c-ok);font-size:15px}
.chip-no{color:var(--c-muted);font-size:15px}
.matrix-note{margin-top:14px;font-size:13.5px;color:var(--c-muted)}
.matrix-note i{color:var(--c-warn);margin-right:6px}

/* ---------- Cards ---------- */
.point-card{
  height:100%;background:var(--c-panel);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-card);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.point-card:hover{transform:translateY(-2px);border-color:rgba(18,227,176,.35);box-shadow:var(--shadow-glow)}
.point-card .point-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;margin-bottom:16px;
  background:rgba(18,227,176,.12);color:var(--c-primary);
  font-family:var(--font-mono);font-size:14px;font-weight:600;
}
.point-card h3{font-size:19px;line-height:1.5;margin-bottom:10px}
.point-card p{color:var(--c-muted);font-size:14.5px;line-height:1.8;margin:0}

.tool-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--c-bg-elev);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.tool-card:hover{transform:translateY(-2px);border-color:rgba(18,227,176,.35);box-shadow:var(--shadow-glow)}
.tool-thumb{overflow:hidden;aspect-ratio:16/9;background:var(--c-panel)}
.tool-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .22s ease-out}
.tool-card:hover .tool-thumb img{transform:scale(1.03)}
.tool-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.tool-body h3{font-size:18.5px;line-height:1.5}
.tool-body p{color:var(--c-muted);font-size:14.5px;line-height:1.78;margin:0}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12.5px;line-height:1.6;
}
.tag-accent{background:rgba(138,107,255,.14);color:#C6B8FF;border:1px solid rgba(138,107,255,.32)}
.tag-primary{background:rgba(18,227,176,.12);color:var(--c-primary);border:1px solid rgba(18,227,176,.3)}
.tag-muted{background:rgba(255,255,255,.04);color:var(--c-muted);border:1px solid var(--c-line)}
.tool-foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid var(--c-line)}
.tool-foot .btn-link{font-size:14px;min-height:40px}

/* ---------- Scene list ---------- */
.scene-list{border-top:1px solid var(--c-line)}
.scene-item{
  display:flex;gap:18px;align-items:flex-start;
  padding:26px 0;border-bottom:1px solid var(--c-line);
  transition:background-color .18s ease-out;
}
.scene-item:hover{background:rgba(255,255,255,.02)}
.scene-item .scene-icon{
  flex:0 0 auto;width:44px;height:44px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(138,107,255,.12);border:1px solid rgba(138,107,255,.3);
  color:#C6B8FF;font-size:16px;
}
.scene-item h3{font-size:18px;line-height:1.5;margin-bottom:6px}
.scene-item p{color:var(--c-muted);font-size:14.5px;line-height:1.8;margin:0}

/* ---------- FAQ ---------- */
.faq-list{max-width:920px}
.faq-item{
  position:relative;
  border:1px solid var(--c-line);border-radius:12px;
  background:var(--c-bg-elev);margin-bottom:12px;overflow:hidden;
  transition:border-color .18s ease-out;
}
.faq-item:hover{border-color:var(--c-line-strong)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;
  min-height:56px;padding:16px 60px 16px 22px;
  color:var(--c-title);font-size:16px;font-weight:500;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  color:var(--c-primary);font-size:22px;line-height:1;font-family:var(--font-mono);
}
.faq-item[open] summary::after{content:"−"}
.faq-item[open]{border-color:rgba(18,227,176,.35)}
.faq-item[open]::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;
  background:var(--c-primary);box-shadow:0 0 10px rgba(18,227,176,.75);
}
.faq-body{padding:0 24px 22px;color:var(--c-text);font-size:15.5px;line-height:1.85;animation:fadeIn .22s ease-out}
.faq-body p:last-child{margin-bottom:0}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---------- Related / CTA ---------- */
.related-grid a.rel-card{
  display:flex;flex-direction:column;gap:8px;height:100%;
  padding:22px;border-radius:var(--r-card);
  background:var(--c-bg-elev);border:1px solid var(--c-line);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.related-grid a.rel-card:hover{transform:translateY(-2px);border-color:rgba(18,227,176,.4);box-shadow:var(--shadow-glow)}
.rel-card .rel-idx{font-family:var(--font-mono);font-size:12.5px;color:var(--c-accent);letter-spacing:.14em}
.rel-card b{color:var(--c-title);font-size:17px;font-weight:600}
.rel-card span.rel-desc{color:var(--c-muted);font-size:14px;line-height:1.75}
.rel-card .rel-go{color:var(--c-primary);font-size:14px;margin-top:auto;display:inline-flex;align-items:center;gap:6px}
.related-grid a.rel-card:hover .rel-go i{transform:translateX(3px)}
.rel-card .rel-go i{transition:transform .18s ease-out}

.cta-panel{
  position:relative;overflow:hidden;
  border:1px solid rgba(18,227,176,.32);border-radius:18px;
  background:linear-gradient(135deg,rgba(18,227,176,.1),rgba(138,107,255,.08) 58%,rgba(18,24,33,.9));
  padding:clamp(28px,4vw,48px);
  box-shadow:0 0 32px -18px rgba(18,227,176,.7);
}
.cta-panel h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;margin-bottom:14px}
.cta-panel p{color:var(--c-text);font-size:15.5px;line-height:1.85;margin:0 0 6px;max-width:44em}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-bg-elev);border-top:1px solid var(--c-line);padding:clamp(48px,6vw,72px) 0 28px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.logo-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));
  color:#04140F;font-weight:800;font-size:16px;
  box-shadow:0 0 22px -10px rgba(18,227,176,.8);
}
.logo-text{display:flex;flex-direction:column;line-height:1.3}
.logo-text b{color:var(--c-title);font-size:16.5px}
.logo-text span{color:var(--c-muted);font-size:12.5px;letter-spacing:.04em}
.footer-about{color:var(--c-muted);font-size:14.5px;line-height:1.8;margin:0;max-width:360px}
.footer-title{color:var(--c-title);font-size:14.5px;margin:0 0 16px;letter-spacing:.02em}
.footer-list{display:flex;flex-direction:column;gap:11px}
.footer-list a,.footer-list span{color:var(--c-muted);font-size:14px;line-height:1.65}
.footer-list a:hover{color:var(--c-primary)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  border-top:1px solid var(--c-line);margin-top:38px;padding-top:20px;
  color:var(--c-muted);font-size:13.5px;
}
.footer-bottom .mono{letter-spacing:.04em}

/* ---------- Responsive ---------- */
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-ghost{display:none}
  .anchor-bar{top:71px}
  .hero-figure{margin-top:30px}
}
@media (max-width:767px){
  body{font-size:16px}
  .brand-text span{display:none}
  .cta-actions .btn{width:100%}
  .hero-actions .btn{width:100%}
  .scene-item{gap:14px}
}
@media (max-width:519px){
  .sec-head h2{font-size:23px}
  .hero h1{font-size:27px}
  .point-card{padding:20px}
  .tool-body{padding:18px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category4 */
:root{
  --c-bg:#0A0E13;
  --c-bg-elev:#121821;
  --c-panel:#171F2A;
  --c-line:rgba(255,255,255,.08);
  --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#12E3B0;
  --c-primary-deep:#0BA98A;
  --c-accent:#8A6BFF;
  --c-warm:#FF8A4C;
  --c-text:#CBD6E2;
  --c-title:#F2F6FA;
  --c-muted:#8494A6;
  --c-ok:#16C784;
  --c-warn:#FFB020;
  --c-err:#FF5A5F;
  --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r-card:14px;
  --r-btn:10px;
  --r-table:16px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset,0 24px 48px -32px rgba(0,0,0,.9);
  --shadow-glow:0 0 0 1px rgba(18,227,176,.35),0 0 28px -8px rgba(18,227,176,.45);
  --sp-section:clamp(64px,8vw,120px);
  --wrap:1220px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    radial-gradient(680px 380px at 12% -6%, rgba(18,227,176,.055), transparent 62%),
    radial-gradient(620px 420px at 92% 8%, rgba(138,107,255,.05), transparent 64%),
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:4px;}

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding-left:clamp(16px,4vw,32px);
  padding-right:clamp(16px,4vw,32px);
  position:relative;
  z-index:1;
}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(10,14,19,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
}
.site-header::after{
  content:"";
  display:block;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(18,227,176,.55),rgba(138,107,255,.4),transparent);
}
.nav-bar{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:70px;
}
.brand{
  display:flex;
  align-items:center;
  gap:11px;
  flex:0 0 auto;
}
.logo-mark{
  width:38px;height:38px;
  display:grid;place-items:center;
  border-radius:11px;
  background:linear-gradient(150deg,rgba(18,227,176,.22),rgba(138,107,255,.22));
  border:1px solid rgba(18,227,176,.42);
  color:var(--c-primary);
  font-family:var(--font-mono);
  font-weight:700;
  font-size:15px;
  letter-spacing:.02em;
  box-shadow:0 0 20px -8px rgba(18,227,176,.6);
}
.logo-text{display:flex;flex-direction:column;line-height:1.2;}
.logo-text b{color:var(--c-title);font-size:17px;letter-spacing:-.01em;}
.logo-text span{color:var(--c-muted);font-size:12px;letter-spacing:.04em;}

.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
  flex-wrap:nowrap;
}
.nav-links a{
  position:relative;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 13px;
  font-size:14.5px;
  color:var(--c-muted);
  border-radius:8px;
  transition:color .18s ease-out,background-color .18s ease-out;
  white-space:nowrap;
}
.nav-links a:hover{color:rgba(18,227,176,.86);background:rgba(255,255,255,.035);}
.nav-links a::after{
  content:"";
  position:absolute;
  left:13px;right:13px;bottom:9px;
  height:2px;
  border-radius:2px;
  background:var(--c-primary);
  transform:scaleX(0);
  transition:transform .18s ease-out;
}
.nav-links a.is-active{color:var(--c-title);}
.nav-links a.is-active::after{
  transform:scaleX(1);
  box-shadow:0 0 12px rgba(18,227,176,.85);
}
.nav-cta{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 20px;
  border-radius:var(--r-btn);
  background:var(--c-primary);
  color:#04140F;
  font-weight:700;
  font-size:14.5px;
  letter-spacing:.01em;
  box-shadow:0 0 0 1px rgba(18,227,176,.5),0 10px 26px -14px rgba(18,227,176,.9);
  transition:filter .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out;
}
.nav-cta:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(18,227,176,.75),0 14px 30px -14px rgba(18,227,176,1);}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:var(--c-panel);
  border:1px solid var(--c-line-strong);
  border-radius:10px;
  color:var(--c-title);
  cursor:pointer;
}

/* ---------- 面包屑 ---------- */
.crumb{padding:22px 0 0;}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:13.5px;color:var(--c-muted);}
.crumb li{display:flex;align-items:center;gap:9px;}
.crumb li+li::before{content:"/";color:rgba(255,255,255,.22);}
.crumb a{color:var(--c-muted);transition:color .18s ease-out;}
.crumb a:hover{color:var(--c-primary);}
.crumb [aria-current]{color:var(--c-text);}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  margin-top:22px;
  border-radius:var(--r-table);
  overflow:hidden;
  border:1px solid var(--c-line);
  background-image:linear-gradient(100deg,rgba(10,14,19,.94) 0%,rgba(10,14,19,.82) 46%,rgba(10,14,19,.6) 100%),url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center right;
}
.hero-inner{
  padding:clamp(32px,5vw,64px);
  display:grid;
  gap:30px;
  grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
  align-items:end;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  background:rgba(138,107,255,.14);
  border:1px solid rgba(138,107,255,.4);
  color:#C9BCFF;
  font-size:12.5px;
  letter-spacing:.06em;
}
.hero h1{
  margin-top:18px;
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.25;
  letter-spacing:-.01em;
  color:var(--c-title);
  font-weight:800;
}
.hero h1 em{
  font-style:normal;
  color:var(--c-primary);
}
.hero-lead{
  margin-top:18px;
  max-width:60ch;
  font-size:16.5px;
  line-height:1.95;
  color:var(--c-text);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  cursor:pointer;
  border:1px solid transparent;
  transition:filter .18s ease-out,box-shadow .18s ease-out,transform .18s ease-out,background-color .18s ease-out,color .18s ease-out;
}
.btn-primary{
  background:var(--c-primary);
  color:#04140F;
  box-shadow:0 0 0 1px rgba(18,227,176,.45),0 12px 30px -16px rgba(18,227,176,.95);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(18,227,176,.8),0 18px 36px -16px rgba(18,227,176,1);}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-ghost{
  background:transparent;
  border-color:var(--c-line-strong);
  color:var(--c-primary);
}
.btn-ghost:hover{border-color:rgba(18,227,176,.6);background:rgba(18,227,176,.07);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.link-arrow{
  display:inline-flex;align-items:center;gap:7px;
  min-height:44px;
  color:var(--c-primary);
  font-weight:600;font-size:14.5px;
  transition:color .18s ease-out;
}
.link-arrow i{transition:transform .18s ease-out;}
.link-arrow:hover{color:#5CF0CC;}
.link-arrow:hover i{transform:translateX(3px);}

.hero-stats{
  display:grid;
  gap:14px;
  border-left:1px solid var(--c-line-strong);
  padding-left:26px;
}
.hero-stats .stat{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.hero-stats .stat b{
  font-family:var(--font-mono);
  font-size:24px;
  color:var(--c-title);
  letter-spacing:-.02em;
}
.hero-stats .stat span{font-size:13px;color:var(--c-muted);}

/* ---------- 锚点胶囊 ---------- */
.anchor-bar{
  margin-top:26px;
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.anchor-bar a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:0 16px;
  border-radius:999px;
  border:1px solid var(--c-line);
  background:rgba(23,31,42,.7);
  color:var(--c-muted);
  font-size:14px;
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out,transform .18s ease-out;
}
.anchor-bar a:hover{color:var(--c-title);border-color:var(--c-line-strong);transform:translateY(-1px);}
.anchor-bar a.is-current{
  background:rgba(18,227,176,.12);
  border-color:rgba(18,227,176,.5);
  color:var(--c-primary);
}

/* ---------- 板块通用 ---------- */
.section{padding-top:var(--sp-section);}
.section-head{max-width:74ch;}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-muted);
}
.eyebrow::before{
  content:"";width:22px;height:1px;background:var(--c-primary);opacity:.8;
}
.section-head h2{
  margin-top:14px;
  font-size:clamp(24px,2.8vw,32px);
  line-height:1.35;
  letter-spacing:-.01em;
  color:var(--c-title);
  font-weight:750;
}
.section-head p{margin-top:14px;color:var(--c-text);}
.section-head p.dim{color:var(--c-muted);font-size:14.5px;}

/* ---------- 双列清单布局 ---------- */
.split{
  display:grid;
  grid-template-columns:minmax(0,.86fr) minmax(0,1.6fr);
  gap:clamp(24px,3.4vw,48px);
  align-items:start;
}
.overview-card{
  position:sticky;
  top:96px;
  background:linear-gradient(180deg,rgba(23,31,42,.92),rgba(18,24,33,.92));
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:26px;
  box-shadow:var(--shadow-card);
}
.overview-card h3{
  font-size:19px;
  color:var(--c-title);
  letter-spacing:-.005em;
}
.overview-card > p{margin-top:12px;font-size:15px;line-height:1.9;color:var(--c-text);}
.overview-list{margin-top:20px;display:grid;gap:12px;}
.overview-list li{
  display:flex;gap:11px;
  font-size:14.5px;
  color:var(--c-text);
  line-height:1.8;
}
.overview-list i{color:var(--c-primary);margin-top:6px;font-size:12px;}
.overview-note{
  margin-top:22px;
  padding-top:18px;
  border-top:1px solid var(--c-line);
  font-size:13px;
  color:var(--c-muted);
}

.checklist{display:grid;gap:14px;}
.check-item{
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:18px;
  align-items:start;
  padding:20px 22px;
  background:var(--c-bg-elev);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.check-item:hover{
  transform:translateY(-2px);
  border-color:rgba(18,227,176,.4);
  box-shadow:var(--shadow-card),var(--shadow-glow);
}
.check-ico{
  width:52px;height:52px;
  border-radius:12px;
  display:grid;place-items:center;
  background:rgba(18,227,176,.1);
  border:1px solid rgba(18,227,176,.28);
  color:var(--c-primary);
  font-size:19px;
}
.check-item h3{
  font-size:17px;
  color:var(--c-title);
  line-height:1.55;
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.check-item p{margin-top:7px;font-size:14.5px;line-height:1.85;color:var(--c-muted);}
.pill{
  display:inline-flex;align-items:center;
  padding:3px 10px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.03em;
  background:rgba(138,107,255,.14);
  border:1px solid rgba(138,107,255,.36);
  color:#C6B8FF;
}
.pill-warm{background:rgba(255,138,76,.13);border-color:rgba(255,138,76,.36);color:#FFB68C;}

/* ---------- 图文卡（coverpic） ---------- */
.media-grid{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:24px;
  align-items:stretch;
}
.media-card{
  display:flex;
  flex-direction:column;
  background:var(--c-panel);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.media-card:hover{transform:translateY(-2px);border-color:var(--c-line-strong);box-shadow:var(--shadow-card),0 0 0 1px rgba(18,227,176,.28);}
.media-thumb{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:linear-gradient(140deg,rgba(18,227,176,.1),rgba(138,107,255,.12));
}
.media-thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .22s ease-out,opacity .22s ease-out;
  opacity:.86;
}
.media-card:hover .media-thumb img{transform:scale(1.03);opacity:1;}
.media-thumb::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,14,19,.05),rgba(10,14,19,.62));
}
.media-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.media-body h3{font-size:18.5px;color:var(--c-title);line-height:1.5;}
.media-body p{font-size:14.5px;line-height:1.85;color:var(--c-muted);flex:1;}
.media-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--c-muted);}

/* ---------- 流程条 ---------- */
.flow{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:18px;
  margin-top:34px;
}
.flow-step{
  padding:22px;
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  background:rgba(18,24,33,.72);
  transition:border-color .18s ease-out,transform .18s ease-out;
}
.flow-step:hover{border-color:rgba(18,227,176,.36);transform:translateY(-2px);}
.flow-step b{
  display:block;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--c-primary);
  letter-spacing:.06em;
}
.flow-step h3{margin-top:12px;font-size:16.5px;color:var(--c-title);}
.flow-step p{margin-top:8px;font-size:14px;line-height:1.8;color:var(--c-muted);}

/* ---------- FAQ ---------- */
.faq{margin-top:34px;border-top:1px solid var(--c-line);}
.faq details{
  border-bottom:1px solid var(--c-line);
  position:relative;
}
.faq summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:64px;
  padding:16px 4px 16px 16px;
  font-size:16.5px;
  color:var(--c-title);
  font-weight:600;
  transition:color .18s ease-out,background-color .18s ease-out;
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--c-primary);background:rgba(255,255,255,.02);}
.faq summary .sign{
  flex:0 0 auto;
  width:30px;height:30px;
  display:grid;place-items:center;
  border-radius:8px;
  border:1px solid var(--c-line-strong);
  color:var(--c-primary);
  font-size:15px;
  font-family:var(--font-mono);
  transition:border-color .18s ease-out,background-color .18s ease-out;
}
.faq details[open] summary{color:var(--c-primary);}
.faq details[open] summary .sign{border-color:rgba(18,227,176,.6);background:rgba(18,227,176,.1);}
.faq details::before{
  content:"";
  position:absolute;
  left:0;top:14px;bottom:14px;
  width:2px;
  border-radius:2px;
  background:var(--c-primary);
  opacity:0;
  transition:opacity .2s ease-out;
}
.faq details[open]::before{opacity:1;}
.faq .answer{
  padding:0 56px 22px 16px;
  font-size:15px;
  line-height:1.9;
  color:var(--c-text);
  animation:fadeIn .24s ease-out;
}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ---------- 相关分类 ---------- */
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:18px;
  margin-top:32px;
}
.related-card{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:22px;
  border-radius:var(--r-card);
  border:1px solid var(--c-line);
  background:var(--c-bg-elev);
  transition:transform .18s ease-out,border-color .18s ease-out,box-shadow .18s ease-out;
}
.related-card:hover{transform:translateY(-2px);border-color:rgba(18,227,176,.4);box-shadow:var(--shadow-glow);}
.related-card h3{font-size:16.5px;color:var(--c-title);}
.related-card p{font-size:14px;line-height:1.8;color:var(--c-muted);flex:1;}
.related-card span.more{font-size:13.5px;color:var(--c-primary);display:inline-flex;align-items:center;gap:7px;}

/* ---------- CTA ---------- */
.cta-band{
  margin-top:clamp(56px,7vw,96px);
  border-radius:var(--r-table);
  border:1px solid rgba(18,227,176,.34);
  background:
    linear-gradient(100deg,rgba(18,227,176,.09),rgba(138,107,255,.08)),
    var(--c-panel);
  box-shadow:0 0 0 1px rgba(18,227,176,.12),0 30px 60px -40px rgba(18,227,176,.5);
  padding:clamp(28px,4vw,48px);
  display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);
  gap:28px;
  align-items:center;
}
.cta-band h2{
  font-size:clamp(22px,2.5vw,28px);
  color:var(--c-title);
  line-height:1.4;
  letter-spacing:-.01em;
}
.cta-band p{margin-top:12px;font-size:15px;color:var(--c-text);max-width:56ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(72px,9vw,120px);
  border-top:1px solid var(--c-line);
  background:linear-gradient(180deg,rgba(18,24,33,.6),rgba(10,14,19,1));
  padding-top:clamp(44px,5vw,68px);
}
.footer-brand{display:flex;align-items:center;gap:11px;}
.footer-about{
  margin-top:16px;
  font-size:14px;
  line-height:1.85;
  color:var(--c-muted);
  max-width:40ch;
}
.footer-title{
  font-size:14px;
  color:var(--c-title);
  letter-spacing:.05em;
  margin-bottom:14px;
}
.footer-list{display:flex;flex-direction:column;gap:10px;}
.footer-list a,.footer-list span{
  font-size:14px;
  color:var(--c-muted);
  transition:color .18s ease-out;
}
.footer-list a:hover{color:var(--c-primary);}
.footer-bottom{
  margin-top:clamp(34px,4vw,52px);
  border-top:1px solid var(--c-line);
  padding:20px 0 26px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--c-muted);
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links{
    position:fixed;
    top:70px;left:0;right:0;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:rgba(10,14,19,.98);
    border-bottom:1px solid var(--c-line);
    padding:10px 16px 22px;
    margin-left:0;
    transform:translateY(-12px);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s;
    max-height:calc(100vh - 70px);
    overflow-y:auto;
  }
  .nav-links.is-open{
    opacity:1;transform:none;visibility:visible;pointer-events:auto;
  }
  .nav-links a{
    min-height:52px;
    border-bottom:1px solid var(--c-line);
    padding:0 6px;
    font-size:15.5px;
    border-radius:0;
  }
  .nav-links a::after{display:none;}
  .nav-links a.is-active{color:var(--c-primary);}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .nav-cta{display:none;}

  .hero-inner{grid-template-columns:minmax(0,1fr);}
  .hero-stats{
    border-left:0;
    border-top:1px solid var(--c-line-strong);
    padding-left:0;
    padding-top:20px;
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
  .split{grid-template-columns:minmax(0,1fr);}
  .overview-card{position:static;}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr));}
  .media-grid{grid-template-columns:minmax(0,1fr);}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{grid-template-columns:minmax(0,1fr);}
  .cta-actions{justify-content:flex-start;}
}

@media (max-width:639px){
  body{font-size:16px;}
  .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .check-item{grid-template-columns:44px minmax(0,1fr);gap:14px;padding:18px;}
  .check-ico{width:44px;height:44px;font-size:16px;}
  .flow{grid-template-columns:minmax(0,1fr);}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .btn{width:100%;}
  .hero-actions .btn{width:100%;}
  .cta-actions{flex-direction:column;}
  .faq .answer{padding-right:20px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
}

/* roulang page: category5 */
:root{
  --c-bg:#0A0E13;
  --c-bg-elev:#121821;
  --c-panel:#171F2A;
  --c-line:rgba(255,255,255,.08);
  --c-line-strong:rgba(255,255,255,.16);
  --c-primary:#12E3B0;
  --c-primary-deep:#0BA98A;
  --c-accent:#8A6BFF;
  --c-warm:#FF8A4C;
  --c-text:#CBD6E2;
  --c-title:#F2F6FA;
  --c-muted:#8494A6;
  --c-ok:#16C784;
  --c-warn:#FFB020;
  --c-err:#FF5A5F;
  --font-sans:-apple-system,"PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --radius-card:14px;
  --radius-btn:10px;
  --radius-table:16px;
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset,0 24px 48px -32px rgba(0,0,0,.9);
  --shadow-hover:0 0 0 1px rgba(18,227,176,.35),0 0 28px -8px rgba(18,227,176,.45);
  --gutter:26px;
  --section-gap:clamp(64px,8vw,120px);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  letter-spacing:.01em;
  text-align:left;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.is-locked{overflow:hidden;}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-primary);text-decoration:none;background:transparent;transition:color .18s ease-out;}
a:hover{color:#5BF0CB;}
h1,h2,h3,h4{margin:0;color:var(--c-title);font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0 0 1.1em;padding-left:1.4em;}
li{margin-bottom:.5em;}
li:last-child{margin-bottom:0;}
button{font-family:inherit;cursor:pointer;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:3px;border-radius:4px;}
::selection{background:rgba(18,227,176,.28);color:#fff;}

/* Foundation 覆盖 */
.button,.button.primary,.button.secondary{display:none;}
.grid-x>.cell{min-width:0;}
summary::-webkit-details-marker{display:none;}
summary{list-style:none;}

.wrap{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:clamp(16px,4vw,32px);
  padding-right:clamp(16px,4vw,32px);
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,14,19,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--c-line);
}
.site-header::after{
  content:"";display:block;height:1px;width:100%;
  background:linear-gradient(90deg,transparent,rgba(18,227,176,.65),rgba(138,107,255,.45),transparent);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:68px;
}
.logo{
  display:flex;align-items:center;gap:10px;flex:0 0 auto;
  color:var(--c-title);
}
.logo:hover{color:var(--c-title);}
.logo-mark{
  width:38px;height:38px;border-radius:11px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep) 70%);
  color:#05221B;font-weight:800;font-size:14px;letter-spacing:.02em;
  box-shadow:0 0 22px -8px rgba(18,227,176,.9);
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text b{font-size:16px;color:var(--c-title);letter-spacing:.01em;}
.logo-text span{font-size:11.5px;color:var(--c-muted);letter-spacing:.08em;}

.nav-links{display:flex;align-items:center;gap:4px;flex-wrap:nowrap;}
.nav-links a{
  position:relative;
  display:inline-flex;align-items:center;
  height:40px;padding:0 13px;
  font-size:14.5px;color:var(--c-text);border-radius:8px;
  white-space:nowrap;
  transition:color .18s ease-out,background-color .18s ease-out;
}
.nav-links a:hover{color:rgba(18,227,176,.85);background:rgba(255,255,255,.03);}
.nav-links a.is-active{color:var(--c-title);}
.nav-links a.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;
  border-radius:2px;background:var(--c-primary);
  box-shadow:0 0 10px 2px rgba(18,227,176,.55);
}
.header-cta{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  height:42px;padding:0 20px;border-radius:var(--radius-btn);
  background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));
  color:#04211A;font-weight:700;font-size:14.5px;
  box-shadow:0 0 0 1px rgba(18,227,176,.4),0 10px 30px -14px rgba(18,227,176,.8);
  transition:filter .18s ease-out,transform .18s ease-out;
}
.header-cta:hover{color:#04211A;filter:brightness(1.08);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--c-line-strong);background:rgba(255,255,255,.02);
  align-items:center;justify-content:center;padding:0;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";display:block;width:18px;height:2px;border-radius:2px;background:var(--c-title);
  transition:transform .2s ease-out,opacity .2s ease-out;
}
.nav-toggle span{position:relative;}
.nav-toggle span::before{position:absolute;top:-6px;left:0;}
.nav-toggle span::after{position:absolute;top:6px;left:0;}
.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);}

/* 抽屉 */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);z-index:90;
  background:var(--c-bg-elev);border-left:1px solid var(--c-line-strong);
  transform:translateX(102%);transition:transform .24s ease-out;
  display:flex;flex-direction:column;padding:22px 20px 26px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--c-line-strong);
  background:transparent;color:var(--c-title);font-size:18px;
}
.drawer-links{display:flex;flex-direction:column;}
.drawer-links a{
  display:flex;align-items:center;min-height:52px;padding:0 6px;
  color:var(--c-text);font-size:16px;border-bottom:1px solid var(--c-line);
}
.drawer-links a.is-active{color:var(--c-primary);font-weight:700;}
.drawer-cta{
  margin-top:22px;display:flex;align-items:center;justify-content:center;
  min-height:48px;border-radius:var(--radius-btn);
  background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));
  color:#04211A;font-weight:700;
}
.drawer-cta:hover{color:#04211A;}
.drawer-mask{
  position:fixed;inset:0;background:rgba(5,8,12,.66);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ============ 通用 ============ */
main{display:block;}
.section{padding:var(--section-gap) 0;}
.section--tight{padding:clamp(44px,5vw,72px) 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--c-primary);font-weight:700;margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--c-primary);box-shadow:0 0 10px rgba(18,227,176,.8);}
h2.block-title{font-size:clamp(24px,2.8vw,32px);line-height:1.35;margin-bottom:14px;}
.block-lead{color:var(--c-muted);font-size:15.5px;max-width:760px;margin-bottom:0;}
.head-row{margin-bottom:clamp(28px,3.4vw,46px);}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600;
  border:1px solid var(--c-line-strong);color:var(--c-text);
  background:rgba(255,255,255,.03);
}
.badge--accent{color:#C3B4FF;border-color:rgba(138,107,255,.42);background:rgba(138,107,255,.12);}
.badge--primary{color:#8CF3DA;border-color:rgba(18,227,176,.4);background:rgba(18,227,176,.12);}
.badge--warm{color:#FFC7A8;border-color:rgba(255,138,76,.42);background:rgba(255,138,76,.12);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;border:1px solid transparent;
  transition:filter .18s ease-out,transform .18s ease-out,background-color .18s ease-out,border-color .18s ease-out,color .18s ease-out;
}
.btn-primary{
  background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));
  color:#04211A;
  box-shadow:0 0 0 1px rgba(18,227,176,.4),0 12px 34px -16px rgba(18,227,176,.9);
}
.btn-primary:hover{color:#04211A;filter:brightness(1.08);transform:translateY(-1px);}
.btn-ghost{
  background:transparent;color:var(--c-primary);border-color:var(--c-line-strong);
}
.btn-ghost:hover{color:#5BF0CB;border-color:rgba(18,227,176,.5);box-shadow:0 0 22px -12px rgba(18,227,176,.8);}
.btn-warm{
  background:transparent;color:var(--c-warm);border-color:rgba(255,138,76,.4);
}
.btn-warm:hover{color:#FFB38C;border-color:rgba(255,138,76,.7);}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;padding:0;min-height:44px;
  color:var(--c-primary);font-weight:600;font-size:15px;background:none;border:none;
}
.btn-link i{transition:transform .18s ease-out;}
.btn-link:hover i{transform:translateX(3px);}

/* ============ 面包屑 ============ */
.crumbs{padding:18px 0 0;}
.crumbs ol{
  list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin:0;padding:0;font-size:13.5px;color:var(--c-muted);
}
.crumbs li{margin:0;display:flex;align-items:center;gap:8px;}
.crumbs li+li::before{content:"/";color:rgba(255,255,255,.22);}
.crumbs a{color:var(--c-muted);}
.crumbs a:hover{color:var(--c-primary);}
.crumbs .current{color:var(--c-text);}

/* ============ Hero ============ */
.hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--c-line);
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center right;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(680px 340px at 12% 8%,rgba(18,227,176,.14),transparent 62%),
    radial-gradient(560px 320px at 88% 92%,rgba(138,107,255,.14),transparent 66%),
    linear-gradient(100deg,rgba(6,9,13,.96) 0%,rgba(7,11,16,.9) 46%,rgba(8,12,18,.68) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:64px 64px;
}
.hero-inner{position:relative;z-index:2;padding:clamp(54px,7vw,96px) 0 clamp(50px,6vw,84px);}
.hero-copy{max-width:720px;}
.hero h1{
  font-size:clamp(30px,4.2vw,46px);line-height:1.25;margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--c-primary);}
.hero-sub{
  font-size:17px;color:var(--c-text);max-width:600px;margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:14px 38px;
  margin-top:44px;padding-top:26px;border-top:1px solid var(--c-line);
}
.hero-metrics .m-item{min-width:120px;}
.hero-metrics .m-num{
  font-family:var(--font-mono);font-size:24px;color:var(--c-title);font-weight:700;
  display:block;line-height:1.3;
}
.hero-metrics .m-label{font-size:13px;color:var(--c-muted);}

/* 锚点胶囊 */
.anchor-bar{
  position:relative;z-index:3;
  border-bottom:1px solid var(--c-line);
  background:rgba(10,14,19,.72);
}
.anchor-scroll{
  display:flex;gap:10px;overflow-x:auto;padding:14px 0;
  scrollbar-width:thin;
}
.anchor-scroll::-webkit-scrollbar{height:4px;}
.anchor-scroll::-webkit-scrollbar-thumb{background:rgba(255,255,255,.16);border-radius:4px;}
.anchor-scroll a{
  flex:0 0 auto;display:inline-flex;align-items:center;height:38px;padding:0 16px;
  border-radius:999px;border:1px solid var(--c-line-strong);
  color:var(--c-text);font-size:14px;background:rgba(255,255,255,.02);
  transition:color .18s ease-out,border-color .18s ease-out,background-color .18s ease-out;
}
.anchor-scroll a:hover{color:var(--c-primary);border-color:rgba(18,227,176,.45);}
.anchor-scroll a.current{
  color:#04211A;background:linear-gradient(140deg,var(--c-primary),var(--c-primary-deep));
  border-color:transparent;font-weight:700;
}

/* ============ 说明块（两列，分隔线） ============ */
.explain{padding-top:clamp(56px,7vw,96px);}
.explain-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 var(--gutter);
}
.explain-col{padding-right:var(--gutter);}
.explain-col+.explain-col{
  padding-right:0;padding-left:var(--gutter);
  border-left:1px solid var(--c-line);
}
.explain-col h3{
  font-size:21px;line-height:1.5;margin-bottom:16px;
  display:flex;align-items:center;gap:10px;
}
.explain-col h3 .idx{
  font-family:var(--font-mono);font-size:13px;color:var(--c-primary);
  border:1px solid rgba(18,227,176,.4);border-radius:999px;padding:2px 10px;
  letter-spacing:.06em;
}
.explain-col p{color:var(--c-text);font-size:16px;}
.explain-list{list-style:none;padding:0;margin:20px 0 0;}
.explain-list li{
  position:relative;padding-left:20px;margin-bottom:14px;font-size:15.5px;color:var(--c-text);
}
.explain-list li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;
  background:var(--c-accent);box-shadow:0 0 10px rgba(138,107,255,.7);
}
.explain-note{
  margin-top:26px;padding:16px 20px;border-left:3px solid var(--c-primary);
  background:var(--c-panel);border-radius:0 var(--radius-card) var(--radius-card) 0;
  font-size:14.5px;color:var(--c-muted);
}
.explain-note strong{color:var(--c-title);}

/* ============ 案例拆解示例（图文） ============ */
.cases{background:var(--c-bg-elev);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);}
.case-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gutter);}
.case-card{
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.case-card:hover{transform:translateY(-2px);border-color:rgba(18,227,176,.35);box-shadow:var(--shadow-hover);}
.case-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0D131B;}
.case-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease-out;}
.case-card:hover .case-media img{transform:scale(1.03);}
.case-media .badge{position:absolute;left:14px;top:14px;background:rgba(9,13,18,.82);backdrop-filter:blur(6px);}
.case-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.case-body h3{font-size:19px;line-height:1.5;}
.case-body p{font-size:15px;color:var(--c-muted);margin:0;}
.case-points{list-style:none;padding:0;margin:2px 0 0;display:flex;flex-direction:column;gap:8px;}
.case-points li{
  display:flex;gap:9px;font-size:14.5px;color:var(--c-text);margin:0;align-items:flex-start;
}
.case-points li i{color:var(--c-primary);font-size:12px;margin-top:7px;}
.case-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.case-foot .tag{font-size:12.5px;color:var(--c-muted);}
.case-foot a{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
}
.case-foot a i{transition:transform .18s ease-out;}
.case-foot a:hover i{transform:translateX(3px);}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--c-panel);border:1px solid var(--c-line);border-radius:var(--radius-card);
  overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item[open]{border-color:rgba(18,227,176,.32);box-shadow:0 0 24px -14px rgba(18,227,176,.7);}
.faq-item summary{
  position:relative;display:flex;align-items:center;gap:14px;
  min-height:60px;padding:14px 58px 14px 22px;
  cursor:pointer;color:var(--c-title);font-size:16.5px;font-weight:600;line-height:1.6;
}
.faq-item summary:hover{color:var(--c-primary);}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:2px;border-radius:2px;
  background:var(--c-primary);opacity:0;transition:opacity .2s ease-out;
  box-shadow:0 0 12px rgba(18,227,176,.8);
}
.faq-item[open] summary::before{opacity:1;}
.faq-item summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:20px;color:var(--c-primary);font-weight:400;line-height:1;
  transition:transform .2s ease-out;
}
.faq-item[open] summary::after{content:"−";}
.faq-body{
  padding:0 22px 22px 22px;color:var(--c-text);font-size:15.5px;
  animation:fadeIn .26s ease-out;
}
.faq-body p{margin-bottom:.9em;}
@keyframes fadeIn{from{opacity:0;transform:translateY(-4px);}to{opacity:1;transform:none;}}

/* ============ CTA ============ */
.cta-panel{
  position:relative;overflow:hidden;
  border:1px solid rgba(18,227,176,.32);border-radius:var(--radius-table);
  background:linear-gradient(120deg,rgba(18,227,176,.1),rgba(138,107,255,.08) 60%,rgba(10,14,19,.4)),
             var(--c-bg-elev);
  padding:clamp(28px,4vw,48px);
  display:flex;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:0 0 0 1px rgba(18,227,176,.08),0 30px 60px -40px rgba(18,227,176,.5);
}
.cta-panel h2{font-size:clamp(22px,2.6vw,29px);line-height:1.35;margin-bottom:12px;}
.cta-panel p{color:var(--c-muted);max-width:560px;margin:0;font-size:15.5px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto;}

/* ============ 相关分类 ============ */
.related .rel-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;}
.rel-item{
  display:flex;flex-direction:column;gap:8px;
  padding:20px;border-radius:var(--radius-card);
  border:1px solid var(--c-line);background:var(--c-panel);
  color:var(--c-text);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out,color .2s ease-out;
}
.rel-item:hover{transform:translateY(-2px);border-color:rgba(18,227,176,.4);color:var(--c-title);box-shadow:var(--shadow-hover);}
.rel-item i{color:var(--c-accent);font-size:17px;}
.rel-item b{color:var(--c-title);font-size:16px;font-weight:700;}
.rel-item span{font-size:13.5px;color:var(--c-muted);line-height:1.7;}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--c-line);
  background:var(--c-bg-elev);
  padding:clamp(48px,6vw,76px) 0 26px;
  margin-top:var(--section-gap);
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .logo-mark{width:40px;height:40px;}
.footer-brand .logo-text b{font-size:16px;}
.footer-brand .logo-text span{font-size:11.5px;}
.footer-about{font-size:14.5px;color:var(--c-muted);line-height:1.85;max-width:340px;}
.footer-title{font-size:14px;color:var(--c-title);margin-bottom:16px;letter-spacing:.02em;}
.footer-list{display:flex;flex-direction:column;gap:10px;}
.footer-list a,.footer-list span{font-size:14px;color:var(--c-muted);line-height:1.6;}
.footer-list a:hover{color:var(--c-primary);}
.footer-bottom{
  margin-top:clamp(34px,4vw,52px);padding-top:20px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-muted);
}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .header-cta{display:none;}
  .related .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:900px){
  .explain-grid{grid-template-columns:minmax(0,1fr);}
  .explain-col{padding-right:0;padding-left:0;}
  .explain-col+.explain-col{
    border-left:none;border-top:1px solid var(--c-line);
    margin-top:34px;padding-top:34px;
  }
  .case-grid{grid-template-columns:minmax(0,1fr);}
  .cta-panel{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}
}
@media (max-width:640px){
  body{font-size:16px;line-height:1.85;}
  .hero-sub{font-size:16px;}
  .hero-actions .btn{width:100%;}
  .hero-metrics{gap:18px 26px;}
  .hero-metrics .m-item{min-width:calc(50% - 13px);}
  .related .rel-grid{grid-template-columns:minmax(0,1fr);}
  .faq-item summary{font-size:15.5px;padding-left:18px;padding-right:50px;}
  .faq-body{padding-left:18px;padding-right:18px;}
  .case-body{padding:20px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}