/* roulang page: index */
:root{
  --bg-0:#060910;
  --bg-1:#0A1018;
  --surface:#0F1725;
  --line:rgba(255,255,255,0.09);
  --line-strong:rgba(255,255,255,0.16);
  --text-1:#EAF0F7;
  --text-2:#9BA9BC;
  --text-3:#6A7889;
  --primary:#21D4A8;
  --primary-deep:#12A585;
  --primary-soft:rgba(33,212,168,0.12);
  --accent:#6C8CFF;
  --warn:#FFB020;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 28px rgba(0,0,0,0.35);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;line-height:1.3;letter-spacing:-0.01em}
p{margin:0}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:rgba(33,212,168,.28);color:#fff}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid rgba(33,212,168,.55);
  outline-offset:2px;
  border-radius:6px;
}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 28px}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,9,16,0.82);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.scrolled{box-shadow:0 6px 20px rgba(0,0,0,.4)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:14px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;min-width:0}
.brand-mark{
  width:34px;height:34px;flex-shrink:0;border-radius:10px;
  display:grid;place-items:center;
  color:var(--primary);
  background:linear-gradient(150deg,rgba(33,212,168,.26),rgba(108,140,255,.20));
  border:1px solid rgba(33,212,168,.45);
  box-shadow:0 0 0 1px rgba(33,212,168,.16),0 6px 18px rgba(33,212,168,.14);
}
.brand-text{font-size:16px;font-weight:700;color:var(--text-1);white-space:nowrap;letter-spacing:-0.01em}
.bt-short{display:none}
@media (max-width:767px){
  .bt-full{display:none}
  .bt-short{display:inline}
  .brand-text{font-size:15px}
}
.nav-chips{display:none;align-items:center;gap:6px;flex:1;justify-content:center}
@media (min-width:1024px){.nav-chips{display:flex}}
.chip{
  display:inline-block;
  padding:7px 14px;border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--text-2);
  font-size:13.5px;line-height:1.6;white-space:nowrap;
  transition:all .2s var(--ease);
}
.chip:hover{color:var(--text-1);border-color:var(--line-strong);background:rgba(255,255,255,.07)}
.chip.active{
  background:var(--primary-soft);
  color:var(--primary);
  border-color:rgba(33,212,168,.5);
}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--radius-sm);
  font-size:14.5px;font-weight:600;line-height:1.4;
  border:1px solid transparent;cursor:pointer;
  transition:all .2s var(--ease);
}
.btn-primary{
  background:var(--primary);color:#05120E;
  box-shadow:0 0 0 1px rgba(33,212,168,.5),0 8px 26px rgba(33,212,168,.22);
}
.btn-primary:hover{background:var(--primary-deep);box-shadow:0 0 0 1px rgba(33,212,168,.62),0 10px 30px rgba(33,212,168,.3)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(33,212,168,.4),0 4px 14px rgba(33,212,168,.18)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-sm{padding:9px 16px;font-size:13.5px}
.link-more{font-size:14px;color:var(--text-2);border-bottom:1px solid transparent;padding-bottom:2px;transition:all .2s var(--ease)}
.link-more:hover{color:var(--primary);border-bottom-color:var(--primary)}
.nav-toggle{
  display:none;width:40px;height:40px;flex-shrink:0;
  align-items:center;justify-content:center;
  border:1px solid var(--line-strong);border-radius:var(--radius-sm);
  background:rgba(255,255,255,.04);color:var(--text-1);cursor:pointer;
  transition:all .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary)}
@media (max-width:1023px){.nav-toggle{display:inline-flex}}
.mobile-panel{display:none;border-top:1px solid var(--line);background:rgba(8,12,20,.98);padding:10px 0 18px}
.mobile-panel.open{display:block}
.mobile-panel a.m-chip{
  display:block;padding:13px 20px;font-size:15px;
  color:var(--text-2);border-left:3px solid transparent;
  transition:all .2s var(--ease);
}
.mobile-panel a.m-chip:hover{color:var(--text-1);background:rgba(255,255,255,.03)}
.mobile-panel a.m-chip.active{
  color:var(--primary);border-left-color:var(--primary);background:var(--primary-soft);
}
@media (min-width:1024px){.mobile-panel{display:none !important}}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-bg{
  position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.webp);
  background-size:cover;background-position:center;
}
.hero-bg::after{content:"";position:absolute;inset:0;background:rgba(6,9,16,.86)}
.hero-lines{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 28%,#000,transparent 76%);
  mask-image:radial-gradient(circle at 50% 28%,#000,transparent 76%);
  opacity:.75;
}
.hero-inner{position:relative;padding:60px 0 56px;display:grid;gap:36px}
@media (min-width:1024px){
  .hero-inner{grid-template-columns:1.05fr .95fr;align-items:center;gap:52px;padding:88px 0 80px}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:999px;
  background:var(--primary-soft);
  border:1px solid rgba(33,212,168,.35);
  color:var(--primary);font-size:12.5px;letter-spacing:.02em;
  margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px var(--primary)}
.hero h1{
  font-size:clamp(30px,4.2vw,50px);
  line-height:1.16;font-weight:800;
  letter-spacing:-0.01em;
  word-break:break-word;
}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-sub{margin-top:18px;font-size:16px;line-height:1.8;color:var(--text-2);max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-note{margin-top:20px;font-size:13px;color:var(--text-3);line-height:1.7}
.hero-note span{color:var(--text-2)}

.metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.metric{
  background:rgba(255,255,255,.055);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border:1px solid rgba(255,255,255,.13);
  border-radius:14px;
  padding:18px 16px;
  box-shadow:0 10px 26px rgba(0,0,0,.3);
  transition:border-color .2s var(--ease),transform .2s var(--ease);
  animation:fadeUp .55s var(--ease) both;
}
.metric:hover{border-color:rgba(33,212,168,.42);transform:translateY(-2px)}
.metric:nth-child(2){animation-delay:.06s}
.metric:nth-child(3){animation-delay:.12s}
.metric:nth-child(4){animation-delay:.18s}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.metric-num{
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
  font-size:32px;line-height:1;font-weight:700;color:var(--text-1);
  letter-spacing:-0.02em;
}
.metric-num i{font-style:normal;font-size:14px;color:var(--text-3);margin-left:4px;font-weight:400}
.metric-label{font-size:13px;color:var(--text-2);margin-top:9px}
.metric-delta{font-size:12.5px;margin-top:5px;line-height:1.6}
.up{color:var(--primary)}
.warn{color:var(--warn)}

/* ---------- 板块 ---------- */
.section{padding:56px 0}
@media (min-width:768px){.section{padding:80px 0}}
@media (min-width:1024px){.section{padding:96px 0}}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.section-title{font-size:clamp(22px,2.4vw,32px);font-weight:700;line-height:1.3}
.section-desc{font-size:14.5px;color:var(--text-2);margin-top:10px;max-width:660px;line-height:1.8}

/* ---------- 功能矩阵 ---------- */
.bento{display:grid;gap:16px;grid-template-columns:1fr}
@media (min-width:640px){.bento{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.bento{grid-template-columns:repeat(6,minmax(0,1fr));gap:18px}}
.card{
  position:relative;overflow:hidden;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:var(--shadow);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.card::before{
  content:"";position:absolute;top:0;right:0;width:44px;height:1px;
  background:transparent;transition:background .2s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(33,212,168,.35)}
.card:hover::before{background:var(--primary)}
.card h3{font-size:17px;font-weight:600;line-height:1.45}
.card p{font-size:14px;line-height:1.75;color:var(--text-2);margin-top:10px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:13.5px;color:var(--primary);transition:gap .2s var(--ease)}
.card:hover .card-link{gap:10px}
.card-ico{
  width:38px;height:38px;border-radius:10px;
  display:grid;place-items:center;margin-bottom:14px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  color:var(--primary);
}
.bento-item{grid-column:span 1}
@media (min-width:1024px){
  .bento-lead{grid-column:span 3;grid-row:span 2;display:flex;flex-direction:column;padding:0}
  .bento-a{grid-column:span 3}
  .bento-b{grid-column:span 3}
  .bento-c{grid-column:span 3}
  .bento-d{grid-column:span 3}
}
.bento-lead .lead-img{
  width:100%;aspect-ratio:16/9;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:#0b1220;
}
.bento-lead .lead-img img{width:100%;height:100%;object-fit:cover}
.bento-lead .lead-body{padding:22px;display:flex;flex-direction:column;flex:1}

/* ---------- 对比数据条 ---------- */
.compare{display:grid;gap:20px;margin-top:8px}
.bar-row{display:grid;gap:10px}
@media (min-width:768px){.bar-row{grid-template-columns:200px 1fr 76px;align-items:center;gap:18px}}
.bar-name{font-size:14.5px;color:var(--text-1);font-weight:600}
.bar-track{height:10px;border-radius:999px;background:rgba(255,255,255,.06);overflow:hidden;border:1px solid var(--line)}
.bar-fill{height:100%;border-radius:999px;background:var(--primary);transition:width .6s var(--ease)}
.bar-fill.alt{background:var(--accent)}
.bar-val{
  font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
  font-size:14px;color:var(--text-1);text-align:right;
}
.compare-legend{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px;font-size:13px;color:var(--text-3)}
.compare-legend i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:6px;vertical-align:middle;font-style:normal}
.dot-primary{background:var(--primary)}
.dot-accent{background:var(--accent)}
.compare-note{font-size:13.5px;color:var(--text-3);margin-top:14px;line-height:1.8}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;gap:18px}
@media (min-width:1024px){.news-grid{grid-template-columns:1.05fr 1fr;align-items:start}}
.news-lead{display:block;padding:0;overflow:hidden}
.news-lead-img{width:100%;aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line);background:#0b1220}
.news-lead-img img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease)}
.news-lead:hover .news-lead-img img{transform:scale(1.03)}
.news-lead-body{padding:20px}
.news-lead-title{font-size:20px;line-height:1.45;font-weight:600;margin-top:12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-lead-sum{font-size:14px;line-height:1.75;color:var(--text-2);margin-top:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-list{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.news-row{
  display:flex;gap:14px;padding:16px 10px;
  border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.news-row:hover{background:rgba(255,255,255,.03)}
.news-row:hover .news-row-title{color:var(--primary)}
.news-thumb{
  width:88px;height:66px;flex-shrink:0;border-radius:10px;overflow:hidden;
  border:1px solid var(--line);background:#0b1220;
  display:grid;place-items:center;color:var(--text-3);
}
.news-row-body{min-width:0;flex:1}
.news-row-title{
  font-size:15.5px;font-weight:600;line-height:1.5;color:var(--text-1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s var(--ease);
}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12.5px;color:var(--text-3);margin-top:8px}
.news-meta time{font-family:ui-monospace,"JetBrains Mono",Consolas,monospace}
.badge{
  display:inline-block;padding:2px 10px;border-radius:999px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  font-size:12px;color:var(--text-2);line-height:1.7;
}
.badge-accent{background:rgba(108,140,255,.12);border-color:rgba(108,140,255,.32);color:var(--accent)}
.empty-state{
  border:1px dashed var(--line);
  border-radius:var(--radius);
  padding:44px 24px;text-align:center;
  background:rgba(255,255,255,.02);
}
.empty-state svg{margin:0 auto 14px;color:var(--text-3)}
.empty-state p{font-size:15px;color:var(--text-2)}
.empty-state .btn{margin-top:18px}

/* ---------- 维护说明 ---------- */
.notice-list{display:grid;gap:0;border-top:1px solid var(--line)}
.notice-item{
  display:grid;gap:6px;padding:18px 0;border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
@media (min-width:768px){.notice-item{grid-template-columns:220px 1fr;gap:24px;align-items:start}}
.notice-item:hover{background:rgba(255,255,255,.025)}
.notice-item h3{font-size:15.5px;font-weight:600;color:var(--text-1)}
.notice-item p{font-size:14px;color:var(--text-2);line-height:1.8}
.notice-tag{
  display:inline-block;padding:1px 9px;border-radius:999px;margin-right:8px;
  font-size:11.5px;line-height:1.8;
  background:var(--primary-soft);border:1px solid rgba(33,212,168,.32);color:var(--primary);
}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);margin-top:6px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 42px 18px 0;
  font-size:16px;font-weight:600;color:var(--text-1);
  transition:color .2s var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);
  font-size:20px;font-weight:400;color:var(--text-3);transition:color .2s var(--ease);
}
.faq details[open] summary::after{content:"−";color:var(--primary)}
.faq summary:hover{color:var(--primary)}
.faq .faq-a{padding:0 42px 20px 0;font-size:14.5px;line-height:1.85;color:var(--text-2)}

/* ---------- CTA / 表单 ---------- */
.cta-section{background:var(--bg-1);border-top:1px solid var(--line)}
.cta-wrap{display:grid;gap:28px}
@media (min-width:1024px){.cta-wrap{grid-template-columns:5fr 7fr;gap:44px;align-items:start}}
.cta-points{display:grid;gap:14px;margin-top:24px}
.cta-points li{display:flex;gap:10px;font-size:14.5px;line-height:1.8;color:var(--text-2)}
.cta-points li::before{
  content:"";flex-shrink:0;width:7px;height:7px;margin-top:11px;border-radius:2px;background:var(--primary);
}
.form-card{
  background:var(--surface);
  border:1px solid rgba(33,212,168,.22);
  border-radius:18px;
  padding:24px;
  box-shadow:0 0 0 1px rgba(33,212,168,.14),0 18px 50px rgba(0,0,0,.45);
}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:var(--text-2);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;background:#0B1220;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:12px 14px;
  color:var(--text-1);font-size:15px;font-family:inherit;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:#4C5A6B}
.field select{appearance:none;-webkit-appearance:none;background-image:linear-gradient(45deg,transparent 50%,#6A7889 50%),linear-gradient(135deg,#6A7889 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(33,212,168,.14);
}
.field textarea{min-height:98px;resize:vertical}
.form-hint{font-size:12px;color:var(--text-3);margin-top:14px;line-height:1.8}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding-top:52px}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media (min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-desc{font-size:13.5px;line-height:1.85;color:var(--text-2);max-width:320px}
.footer-title{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:14px}
.footer-links a{display:block;font-size:13.5px;color:var(--text-2);padding:5px 0;transition:color .2s var(--ease)}
.footer-links a:hover{color:var(--primary)}
.footer-info{font-size:13.5px;color:var(--text-2);line-height:1.9}
.footer-info strong{color:var(--text-1);font-weight:600}
.footer-bottom{
  border-top:1px solid var(--line);
  margin-top:40px;padding:18px 0 24px;
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  font-size:12.5px;color:var(--text-3);
}
.footer-bottom span{word-break:break-all}

/* ---------- 通用微调 ---------- */
.text-primary{color:var(--primary)}
.mt-6{margin-top:6px}
.mt-10{margin-top:10px}
.mt-14{margin-top:14px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: article */
:root{
  --bg-0:#060910;
  --bg-1:#0A1018;
  --surface:#0F1725;
  --surface-2:#0B1220;
  --line:rgba(255,255,255,0.09);
  --line-strong:rgba(255,255,255,0.16);
  --text-1:#EAF0F7;
  --text-2:#9BA9BC;
  --text-3:#6A7889;
  --primary:#21D4A8;
  --primary-deep:#12A585;
  --primary-soft:rgba(33,212,168,0.12);
  --accent:#6C8CFF;
  --accent-soft:rgba(108,140,255,0.12);
  --warn:#FFB020;
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 10px 28px rgba(0,0,0,.35);
  --shadow-btn:0 0 0 1px rgba(33,212,168,.5),0 8px 26px rgba(33,212,168,.22);
  --ease:200ms cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img)}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease),background-color var(--ease),transform var(--ease)}
a:hover{color:var(--primary)}
h1,h2,h3,h4{color:var(--text-1);margin:0;font-weight:700;line-height:1.35}
p{margin:0}
ul,ol{margin:0;padding:0}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--text-1);background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-btn);padding:12px 14px;width:100%;transition:border-color var(--ease),box-shadow var(--ease)}
input:focus,select:focus,textarea:focus{outline:0;border-color:var(--primary);box-shadow:0 0 0 3px rgba(33,212,168,.18)}
:focus-visible{outline:2px solid rgba(33,212,168,.55);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:768px){.container{padding-left:28px;padding-right:28px}}

/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,9,16,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background-color var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(0,0,0,.4)}
.header-inner{display:flex;align-items:center;gap:16px;min-height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--text-1)}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  color:var(--primary);
  background:var(--primary-soft);
  border:1px solid rgba(33,212,168,.45);
  box-shadow:0 0 0 1px rgba(33,212,168,.12);
}
.brand-text{font-size:16px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.nav-chips{display:none;align-items:center;gap:8px;margin-left:8px;flex:1 1 auto}
.chip{
  display:inline-flex;align-items:center;
  padding:8px 14px;border-radius:999px;
  font-size:14px;color:var(--text-2);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  white-space:nowrap;
  transition:all var(--ease);
}
.chip:hover{color:var(--text-1);border-color:var(--line-strong);background:rgba(255,255,255,.06)}
.chip.active{color:var(--primary);background:var(--primary-soft);border-color:rgba(33,212,168,.5)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.nav-toggle{
  width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-1);
  transition:all var(--ease);
}
.nav-toggle:hover{border-color:var(--line-strong);color:var(--primary)}
.mobile-panel{display:none;border-top:1px solid var(--line);background:rgba(8,12,20,.98)}
.mobile-panel.open{display:block}
.mobile-panel .container{padding-top:10px;padding-bottom:16px}
.mobile-panel a{
  display:block;padding:14px 12px;border-radius:10px;font-size:15px;color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.mobile-panel a:last-child{border-bottom:0}
.mobile-panel a.active{color:var(--primary);background:rgba(33,212,168,.08);box-shadow:inset 3px 0 0 var(--primary)}
@media(min-width:1024px){
  .nav-chips{display:flex}
  .nav-toggle{display:none}
  .mobile-panel{display:none !important}
}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:all var(--ease);white-space:nowrap;
}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-primary{
  background:var(--primary);color:#05120E;border:1px solid var(--primary);
  box-shadow:var(--shadow-btn);
}
.btn-primary:hover{background:var(--primary-deep);border-color:var(--primary-deep);color:#04100C;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(33,212,168,.65),0 12px 30px rgba(33,212,168,.3)}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(33,212,168,.4),0 4px 14px rgba(33,212,168,.18)}
.btn-ghost{background:transparent;color:var(--text-1);border:1px solid var(--line-strong)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--text-2);font-size:14px;font-weight:600;
  border-bottom:1px solid transparent;padding-bottom:2px;
}
.btn-link:hover{color:var(--primary);border-bottom-color:var(--primary)}

/* ===== Breadcrumb ===== */
.page-top{padding:26px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-3)}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:rgba(255,255,255,.18)}
.breadcrumb .current{color:var(--text-2);max-width:100%;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== Article layout ===== */
.article-section{padding:26px 0 64px}
.article-grid{display:grid;grid-template-columns:1fr;gap:34px;align-items:start}
@media(min-width:1280px){
  .article-grid{grid-template-columns:minmax(0,1fr) 240px;gap:44px}
}
.article-main{min-width:0}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:13px;font-weight:600;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--text-2);
}
.badge-accent{color:var(--accent);background:var(--accent-soft);border-color:rgba(108,140,255,.32)}
.badge-primary{color:var(--primary);background:var(--primary-soft);border-color:rgba(33,212,168,.4)}
.badge-warn{color:var(--warn);background:rgba(255,176,32,.12);border-color:rgba(255,176,32,.32)}
.article-head{padding-bottom:24px;border-bottom:1px solid var(--line);margin-bottom:28px}
.article-h1{
  font-size:clamp(24px,3.2vw,34px);
  line-height:1.3;font-weight:800;letter-spacing:-.01em;
  margin:16px 0 18px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--text-3)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.22)}
.article-meta .num{font-family:var(--font-num)}

/* ===== Prose ===== */
.prose{max-width:760px;font-size:16px;line-height:1.9;color:var(--text-2)}
.prose > * + *{margin-top:18px}
.prose p{margin:0 0 18px}
.prose h2{
  position:relative;
  font-size:clamp(20px,2.2vw,26px);
  line-height:1.4;color:var(--text-1);
  margin:36px 0 16px;padding-left:14px;
}
.prose h2::before{
  content:"";position:absolute;left:0;top:.35em;width:3px;height:1em;border-radius:2px;background:var(--primary);
}
.prose h3{font-size:19px;color:var(--text-1);margin:26px 0 12px}
.prose h4{font-size:17px;color:var(--text-1);margin:20px 0 10px}
.prose a{color:var(--primary);border-bottom:1px solid rgba(33,212,168,.4)}
.prose a:hover{color:#5CE7C6;border-bottom-color:#5CE7C6}
.prose ul,.prose ol{padding-left:4px;margin:0 0 18px;list-style:none}
.prose ul li,.prose ol li{position:relative;padding-left:22px;margin:8px 0;line-height:1.85}
.prose ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;border-radius:2px;background:var(--primary);
}
.prose ol{counter-reset:olnum}
.prose ol li{counter-increment:olnum}
.prose ol li::before{
  content:counter(olnum,decimal-leading-zero);
  position:absolute;left:0;top:0;font-family:var(--font-num);font-size:12px;color:var(--primary);letter-spacing:.04em;
}
.prose blockquote{
  margin:22px 0;padding:16px 20px;
  border-left:3px solid var(--primary);
  background:rgba(255,255,255,.03);
  border-radius:0 var(--radius-img) var(--radius-img) 0;
  color:var(--text-2);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{margin:24px 0;border:1px solid var(--line);border-radius:var(--radius-img);width:100%;height:auto}
.prose figure{margin:24px 0}
.prose figcaption{text-align:center;font-size:13px;color:var(--text-3);margin-top:10px}
.prose table{
  width:100%;border-collapse:separate;border-spacing:0;
  margin:24px 0;font-size:14px;
  border:1px solid var(--line);border-radius:var(--radius-img);overflow:hidden;
}
.prose thead th{
  background:rgba(255,255,255,.05);color:var(--text-1);font-weight:600;text-align:left;
  padding:12px 14px;border-bottom:1px solid var(--line);
}
.prose tbody td{padding:12px 14px;border-bottom:1px solid var(--line);color:var(--text-2)}
.prose tbody tr:last-child td{border-bottom:0}
.prose tbody tr:hover td{background:rgba(255,255,255,.03)}
.prose code{
  font-family:var(--font-num);font-size:14px;
  background:rgba(255,255,255,.06);border:1px solid var(--line);
  border-radius:6px;padding:2px 6px;color:#9BE9D6;
}
.prose hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* ===== Empty state ===== */
.empty-panel{
  border:1px dashed var(--line);border-radius:var(--radius-card);
  padding:44px 24px;text-align:center;background:var(--bg-1);
}
.empty-panel .empty-icon{
  width:52px;height:52px;margin:0 auto 16px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  color:var(--primary);background:var(--primary-soft);border:1px solid rgba(33,212,168,.35);
}
.empty-panel h2{font-size:20px;margin-bottom:10px}
.empty-panel p{font-size:15px;color:var(--text-2);margin-bottom:20px}

/* ===== Sidebar ===== */
.article-side{display:none}
@media(min-width:1280px){
  .article-side{display:block;position:sticky;top:94px}
}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:20px;box-shadow:var(--shadow-card);
}
.side-title{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--text-3);text-transform:uppercase;margin-bottom:14px}
.toc{list-style:none;display:flex;flex-direction:column;gap:2px;max-height:60vh;overflow:auto;scrollbar-width:none}
.toc::-webkit-scrollbar{display:none}
.toc a{
  display:block;font-size:13px;line-height:1.6;color:var(--text-2);
  padding:7px 0 7px 12px;border-left:2px solid transparent;
}
.toc a:hover{color:var(--primary);border-left-color:rgba(33,212,168,.4)}
.toc a.is-active{color:var(--primary);border-left-color:var(--primary);background:rgba(33,212,168,.06)}
.side-cta{margin-top:18px;border-radius:var(--radius-card);padding:18px;background:linear-gradient(180deg,rgba(33,212,168,.14),rgba(33,212,168,.03));border:1px solid rgba(33,212,168,.28)}
.side-cta h3{font-size:15px;margin-bottom:8px}
.side-cta p{font-size:13px;line-height:1.7;color:var(--text-2);margin-bottom:14px}
.side-cta .btn{width:100%}

/* ===== Article footer blocks ===== */
.tags-row{display:flex;flex-wrap:wrap;gap:8px;margin:32px 0 0;padding-top:24px;border-top:1px solid var(--line)}
.back-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.related{padding:56px 0;background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px;flex-wrap:wrap}
.section-head h2{font-size:clamp(20px,2.4vw,28px)}
.section-head p{font-size:14px;color:var(--text-3);margin-top:6px}
.card-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.card{
  position:relative;display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);overflow:hidden;
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(33,212,168,.35);box-shadow:0 14px 34px rgba(0,0,0,.45)}
.card:hover::after{content:"";position:absolute;top:0;right:0;width:46px;height:1px;background:var(--primary)}
.card-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-1)}
.card-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 400ms cubic-bezier(.2,.7,.3,1)}
.card:hover .card-thumb img{transform:scale(1.04)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body h3 a:hover{color:var(--primary)}
.card-body p{font-size:14px;line-height:1.75;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:6px;font-size:13px;color:var(--text-3)}
.card-meta .num{font-family:var(--font-num)}

/* ===== CTA band ===== */
.cta-band{padding:48px 0}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
  padding:28px;border-radius:var(--radius-card);
  background:radial-gradient(120% 160% at 0% 0%,rgba(33,212,168,.16),rgba(33,212,168,.02) 55%),var(--surface);
  border:1px solid rgba(33,212,168,.28);
  box-shadow:0 0 0 1px rgba(33,212,168,.1),0 18px 40px rgba(0,0,0,.4);
}
.cta-inner h2{font-size:clamp(19px,2.2vw,24px);margin-bottom:8px}
.cta-inner p{font-size:14px;color:var(--text-2);max-width:56ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ===== Footer ===== */
.site-footer{background:var(--bg-0);border-top:1px solid var(--line);padding:52px 0 26px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:30px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-desc{font-size:14px;line-height:1.8;color:var(--text-2);max-width:34ch}
.footer-title{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-2)}
.footer-links a:hover{color:var(--primary)}
.footer-info{font-size:13px;line-height:1.9;color:var(--text-3)}
.footer-info strong{color:var(--text-2);font-weight:600}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  margin-top:34px;padding-top:20px;border-top:1px solid var(--line);
  font-size:12px;color:var(--text-3);
}
@media(max-width:520px){
  .header-inner{min-height:62px;gap:10px}
  .brand-text{font-size:14px;max-width:150px;overflow:hidden;text-overflow:ellipsis}
  .btn-sm{padding:8px 12px;font-size:13px}
  .article-h1{font-size:23px}
  .cta-inner{padding:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
}

/* roulang page: category1 */
:root{
  --bg-0:#060910;
  --bg-1:#0A1018;
  --surface:#0F1725;
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.16);
  --text-1:#EAF0F7;
  --text-2:#9BA9BC;
  --text-3:#6A7889;
  --primary:#21D4A8;
  --primary-deep:#12A585;
  --primary-soft:rgba(33,212,168,.12);
  --accent:#6C8CFF;
  --warn:#FFB020;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 10px 28px rgba(0,0,0,.35);
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:64px 64px,64px 64px;
  background-position:center top;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,select,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid rgba(33,212,168,.55);outline-offset:2px;border-radius:6px;}
::selection{background:rgba(33,212,168,.28);color:#fff;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container{padding:0 28px;}}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:10px;font-size:15px;font-weight:600;line-height:1.2;
  transition:all 200ms var(--ease);border:1px solid transparent;white-space:nowrap;
}
.btn-primary{
  background:var(--primary);color:#05120E;border-color:rgba(33,212,168,.6);
  box-shadow:0 0 0 1px rgba(33,212,168,.35),0 8px 26px rgba(33,212,168,.22);
}
.btn-primary:hover{background:var(--primary-deep);box-shadow:0 0 0 1px rgba(33,212,168,.5),0 10px 30px rgba(33,212,168,.32);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(33,212,168,.3),0 4px 14px rgba(33,212,168,.18);}
.btn-ghost{background:transparent;color:var(--text-1);border-color:var(--line-strong);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);}
.btn-ghost:active{transform:translateY(1px);}
.link-more{display:inline-flex;align-items:center;gap:6px;color:var(--text-2);font-size:14px;font-weight:600;border-bottom:1px solid transparent;padding-bottom:2px;transition:all 200ms var(--ease);}
.link-more:hover{color:var(--primary);border-bottom-color:rgba(33,212,168,.6);}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.02em;background:rgba(255,255,255,.05);
  color:var(--text-2);border:1px solid var(--line);
}
.badge-primary{background:var(--primary-soft);color:var(--primary);border-color:rgba(33,212,168,.42);}
.badge-accent{background:rgba(108,140,255,.12);color:var(--accent);border-color:rgba(108,140,255,.32);}
.badge-warn{background:rgba(255,176,32,.12);color:var(--warn);border-color:rgba(255,176,32,.32);}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.02em;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,9,16,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow 220ms var(--ease);
}
.site-header.scrolled{box-shadow:0 6px 20px rgba(0,0,0,.4);}
.nav-wrap{display:flex;align-items:center;gap:18px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;color:var(--text-1);font-weight:700;font-size:16px;letter-spacing:-.01em;transition:color 200ms var(--ease);}
.brand:hover{color:#fff;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex-shrink:0;
  background:var(--primary-soft);color:var(--primary);border:1px solid rgba(33,212,168,.42);
}
.brand-text{white-space:nowrap;}
.brand-short{display:none;}
.nav-chips{display:flex;align-items:center;gap:8px;margin-left:8px;flex-wrap:nowrap;}
.chip{
  display:inline-flex;align-items:center;
  padding:8px 16px;border-radius:999px;font-size:14px;font-weight:500;white-space:nowrap;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--text-2);
  transition:all 200ms var(--ease);
}
.chip:hover{border-color:var(--line-strong);color:var(--text-1);}
.chip.active{background:var(--primary-soft);color:var(--primary);border-color:rgba(33,212,168,.5);}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:14px;}
.nav-cta{padding:10px 18px;font-size:14px;}
.menu-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;
  align-items:center;justify-content:center;color:var(--text-1);background:rgba(255,255,255,.03);
  margin-left:auto;transition:all 200ms var(--ease);
}
.menu-toggle:hover{border-color:var(--line-strong);color:var(--primary);}

@media (max-width:1023px){
  .nav-wrap{height:64px;gap:12px;}
  .nav-chips{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:2px;
    background:rgba(8,12,20,.98);
    border-bottom:1px solid var(--line);
    padding:10px 20px 16px;
    margin:0;display:none;
    box-shadow:0 18px 30px rgba(0,0,0,.45);
  }
  .nav-chips.open{display:flex;}
  .chip{border-radius:8px;padding:12px 14px;border-color:transparent;background:transparent;font-size:15px;}
  .chip.active{background:rgba(33,212,168,.08);border-color:transparent;border-left:3px solid var(--primary);border-radius:4px 8px 8px 4px;}
  .menu-toggle{display:inline-flex;}
  .nav-actions .nav-cta{display:none;}
  .brand-short{display:inline;}
  .brand-full{display:none;}
}

/* ---------- 迷你 Hero ---------- */
.hero-mini{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,16,24,.9),rgba(6,9,16,.98));
}
.hero-mini::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:40px 40px;
  mask-image:radial-gradient(ellipse at 30% 0%,#000 10%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse at 30% 0%,#000 10%,transparent 72%);
  pointer-events:none;
}
.hero-mini-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1fr;gap:32px;
  padding:44px 0 48px;
}
@media (min-width:1024px){
  .hero-mini-inner{grid-template-columns:1.1fr .9fr;gap:48px;padding:64px 0 68px;align-items:center;}
}
.hero-copy h1{
  margin:16px 0 18px;
  font-size:clamp(28px,4.2vw,46px);
  line-height:1.18;font-weight:800;letter-spacing:-.01em;color:var(--text-1);
}
.hero-sub{font-size:15px;line-height:1.8;color:var(--text-2);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-note{
  margin-top:20px;font-size:13px;color:var(--text-3);
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
}
.hero-note .dot{width:5px;height:5px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px rgba(33,212,168,.9);}
.hero-aside{position:relative;}
.hero-media{
  position:relative;border-radius:14px;overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
  aspect-ratio:16/10;background:var(--surface);
}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.72;}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,9,16,.1),rgba(6,9,16,.85));
}
.hero-float{
  position:absolute;left:16px;right:16px;bottom:16px;
  border-radius:12px;padding:14px 16px;
  background:rgba(15,23,37,.62);
  border:1px solid rgba(255,255,255,.14);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.hero-float .k{font-size:12px;color:var(--text-3);letter-spacing:.06em;}
.hero-float .v{font-size:24px;font-weight:700;color:var(--primary);font-family:var(--mono);line-height:1.2;}
.hero-float .t{font-size:12px;color:var(--text-2);}

/* ---------- 指标条 ---------- */
.section{padding:56px 0;}
@media (min-width:768px){.section{padding:72px 0;}}
@media (min-width:1024px){.section{padding:84px 0;}}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:32px;}
.section-head h2{
  font-size:clamp(22px,2.4vw,30px);line-height:1.3;font-weight:700;color:var(--text-1);letter-spacing:-.01em;
}
.section-head .sub{margin-top:8px;font-size:14px;color:var(--text-3);max-width:640px;}
.metric-strip{
  display:grid;grid-template-columns:1fr;gap:0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
@media (min-width:640px){.metric-strip{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.metric-strip{grid-template-columns:repeat(4,1fr);}}
.metric-item{
  padding:22px 20px;border-bottom:1px solid var(--line);
  transition:background 200ms var(--ease);
}
.metric-item:hover{background:rgba(255,255,255,.025);}
@media (min-width:640px){
  .metric-item{border-right:1px solid var(--line);}
  .metric-item:nth-child(2n){border-right:0;}
}
@media (min-width:1024px){
  .metric-item{border-bottom:0;border-right:1px solid var(--line);}
  .metric-item:nth-child(2n){border-right:1px solid var(--line);}
  .metric-item:last-child{border-right:0;}
}
.metric-item .label{font-size:13px;color:var(--text-3);letter-spacing:.04em;}
.metric-item .value{
  font-family:var(--mono);font-size:clamp(28px,3.4vw,38px);font-weight:700;
  color:var(--text-1);line-height:1.15;margin:8px 0 6px;letter-spacing:-.02em;
}
.metric-item .value em{font-style:normal;font-size:15px;color:var(--text-3);margin-left:4px;}
.metric-item .delta{font-size:13px;color:var(--primary);}
.metric-item .delta.warn{color:var(--warn);}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
.card{
  position:relative;display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);overflow:hidden;
  transition:transform 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease);
}
.card::after{
  content:"";position:absolute;top:0;right:0;width:0;height:1px;background:var(--primary);
  transition:width 240ms var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(33,212,168,.35);box-shadow:0 14px 34px rgba(0,0,0,.45);}
.card:hover::after{width:56px;}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:17px;font-weight:600;color:var(--text-1);line-height:1.45;}
.card-body p{font-size:14px;line-height:1.75;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{margin-top:auto;padding-top:14px;display:flex;align-items:center;justify-content:space-between;gap:10px;}
.card-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0b1220;border-bottom:1px solid var(--line);}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 320ms var(--ease);opacity:.86;}
.card:hover .card-thumb img{transform:scale(1.03);}
.card-thumb .tag{position:absolute;left:12px;top:12px;}
.card-wide{grid-column:span 1;}
@media (min-width:1024px){
  .card-wide{grid-column:span 2;flex-direction:row;}
  .card-wide .card-thumb{width:48%;aspect-ratio:auto;height:100%;border-bottom:0;border-right:1px solid var(--line);}
  .card-wide .card-body{padding:26px 28px;width:52%;}
  .card-wide .card-body h3{font-size:20px;}
  .card-wide .card-body p{-webkit-line-clamp:3;font-size:14.5px;}
}

/* ---------- 对比条 ---------- */
.compare-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:24px 22px;
}
@media (min-width:768px){.compare-panel{padding:32px 30px;}}
.compare-row{padding:18px 0;border-bottom:1px solid var(--line);}
.compare-row:first-of-type{padding-top:4px;}
.compare-row:last-of-type{border-bottom:0;padding-bottom:4px;}
.compare-top{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:10px;}
.compare-top .name{font-size:15px;font-weight:600;color:var(--text-1);}
.compare-top .val{font-family:var(--mono);font-size:13px;color:var(--text-3);}
.bar-track{
  position:relative;height:10px;border-radius:999px;background:rgba(255,255,255,.06);overflow:hidden;
}
.bar-fill{height:100%;border-radius:999px;background:var(--primary);transition:width 600ms var(--ease);}
.bar-fill.alt{background:var(--accent);}
.bar-fill.warn{background:var(--warn);}
.bar-group{display:grid;gap:8px;}
.bar-line{display:flex;align-items:center;gap:12px;}
.bar-line .cap{font-size:12px;color:var(--text-3);width:58px;flex-shrink:0;font-family:var(--mono);}
.bar-line .bar-track{flex:1;}
.legend{display:flex;gap:18px;flex-wrap:wrap;margin-top:22px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);}
.legend span{display:inline-flex;align-items:center;gap:8px;}
.legend i{width:10px;height:10px;border-radius:3px;display:inline-block;}

/* ---------- 清单 ---------- */
.checklist{display:grid;grid-template-columns:1fr;gap:14px 28px;margin-top:8px;}
@media (min-width:768px){.checklist{grid-template-columns:repeat(2,1fr);}}
.check-item{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:rgba(255,255,255,.02);transition:all 200ms var(--ease);}
.check-item:hover{border-color:rgba(33,212,168,.32);background:rgba(33,212,168,.05);}
.check-icon{
  width:20px;height:20px;flex-shrink:0;border-radius:6px;border:1px solid rgba(33,212,168,.55);
  display:grid;place-items:center;color:var(--primary);margin-top:3px;
}
.check-item p{font-size:14px;line-height:1.7;color:var(--text-2);}
.check-item strong{color:var(--text-1);font-weight:600;}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);}
.faq summary{
  list-style:none;cursor:pointer;position:relative;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 40px 20px 0;font-size:16px;font-weight:600;color:var(--text-1);
  transition:color 200ms var(--ease);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--primary);}
.faq summary::after{
  content:"";position:absolute;right:6px;top:50%;width:12px;height:12px;
  transform:translateY(-50%);border-right:2px solid var(--text-3);border-bottom:2px solid var(--text-3);
  transition:transform 240ms var(--ease),border-color 200ms var(--ease);
}
.faq details[open] summary::after{transform:translateY(-50%) rotate(225deg);border-color:var(--primary);}
.faq .answer{padding:0 40px 22px 0;font-size:14.5px;line-height:1.85;color:var(--text-2);}
.faq .answer a{color:var(--primary);border-bottom:1px solid rgba(33,212,168,.4);}

/* ---------- CTA 带 ---------- */
.cta-band{
  display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap;
  padding:26px 24px;border-radius:var(--radius);
  background:linear-gradient(120deg,rgba(33,212,168,.1),rgba(15,23,37,.9) 55%);
  border:1px solid rgba(33,212,168,.28);
  box-shadow:0 0 0 1px rgba(33,212,168,.08),0 14px 36px rgba(0,0,0,.4);
}
@media (min-width:768px){.cta-band{padding:30px 34px;}}
.cta-band h2{font-size:clamp(19px,2.2vw,24px);line-height:1.4;color:var(--text-1);font-weight:700;}
.cta-band p{margin-top:8px;font-size:14px;color:var(--text-2);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-0);border-top:1px solid var(--line);padding:52px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:36px;}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-brand{display:flex;align-items:center;gap:10px;color:var(--text-1);font-weight:700;font-size:15px;}
.footer-brand .brand-mark{width:30px;height:30px;border-radius:9px;}
.footer-desc{margin-top:14px;font-size:13.5px;line-height:1.8;color:var(--text-3);max-width:340px;}
.footer-title{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:13.5px;color:var(--text-2);transition:color 200ms var(--ease);}
.footer-links a:hover{color:var(--primary);}
.footer-info{font-size:13.5px;line-height:2;color:var(--text-3);}
.footer-info strong{color:var(--text-2);font-weight:600;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  padding:18px 0 26px;border-top:1px solid var(--line);
  font-size:12px;color:var(--text-3);
}

/* roulang page: category2 */
:root{
    --bg-0:#060910;
    --bg-1:#0A1018;
    --surface:#0F1725;
    --line:rgba(255,255,255,.09);
    --line-strong:rgba(255,255,255,.16);
    --text-1:#EAF0F7;
    --text-2:#9BA9BC;
    --text-3:#6A7889;
    --primary:#21D4A8;
    --primary-deep:#12A585;
    --primary-soft:rgba(33,212,168,.12);
    --accent:#6C8CFF;
    --warn:#FFB020;
    --radius:16px;
    --radius-sm:12px;
    --radius-btn:10px;
    --shadow:0 10px 28px rgba(0,0,0,.35);
    --ease:cubic-bezier(.2,.7,.3,1);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg-0);
    color:var(--text-2);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit}
  ::selection{background:rgba(33,212,168,.28);color:#fff}

  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){.container{padding:0 28px}}
  @media (min-width:1280px){.container{max-width:1200px}}

  /* ============ HEADER ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(6,9,16,.86);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s var(--ease);
  }
  .site-header.is-scrolled{box-shadow:0 6px 20px rgba(0,0,0,.45)}
  .header-inner{display:flex;align-items:center;gap:14px;height:68px}
  .brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-width:0}
  .brand-mark{
    width:32px;height:32px;flex:0 0 auto;display:grid;place-items:center;
    border-radius:9px;color:var(--primary);
    background:var(--primary-soft);
    border:1px solid rgba(33,212,168,.35);
  }
  .brand-text{
    color:var(--text-1);font-weight:700;font-size:16px;letter-spacing:-.01em;
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  }
  @media (max-width:520px){.brand-text{font-size:14px}}
  .nav-chips{display:none;align-items:center;gap:8px;margin:0 auto}
  .chip{
    display:inline-flex;align-items:center;
    padding:7px 14px;border-radius:999px;
    font-size:14px;line-height:1.4;white-space:nowrap;
    color:var(--text-2);
    background:rgba(255,255,255,.04);
    border:1px solid var(--line);
    transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
  }
  .chip:hover{color:var(--text-1);border-color:var(--line-strong)}
  .chip.active{
    color:var(--primary);
    background:var(--primary-soft);
    border-color:rgba(33,212,168,.5);
  }
  .header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
  .nav-toggle{
    display:none;width:40px;height:40px;
    border-radius:10px;border:1px solid var(--line);
    background:rgba(255,255,255,.03);
    cursor:pointer;padding:0;
    align-items:center;justify-content:center;flex-direction:column;gap:4px;
    transition:border-color .2s var(--ease);
  }
  .nav-toggle:hover{border-color:var(--line-strong)}
  .nav-toggle span{display:block;width:16px;height:1.5px;background:var(--text-1);border-radius:2px}
  @media (max-width:1023px){
    .nav-toggle{display:flex}
    .header-actions .btn-primary{display:none}
  }
  .mobile-panel{display:none;border-top:1px solid var(--line);background:rgba(6,9,16,.98)}
  .mobile-panel.open{display:block}
  .mobile-panel nav{display:flex;flex-direction:column;padding:10px 20px 18px}
  .mobile-panel .chip{
    border-radius:10px;justify-content:flex-start;
    padding:12px 14px;border:1px solid transparent;background:transparent;
  }
  .mobile-panel .chip.active{
    background:rgba(255,255,255,.04);
    border-color:transparent;
    box-shadow:inset 3px 0 0 var(--primary);
    color:var(--primary);
  }
  .mobile-panel .chip + .chip{border-top:1px solid var(--line)}

  /* ============ BUTTONS ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:11px 22px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;line-height:1.4;cursor:pointer;
    border:1px solid transparent;
    transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(33,212,168,.55)}
  .btn-primary{
    background:var(--primary);color:#05120E;
    box-shadow:0 0 0 1px rgba(33,212,168,.5),0 8px 26px rgba(33,212,168,.22);
  }
  .btn-primary:hover{background:var(--primary-deep);box-shadow:0 0 0 1px rgba(33,212,168,.6),0 10px 30px rgba(33,212,168,.32)}
  .btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(33,212,168,.4),0 4px 14px rgba(33,212,168,.18)}
  .btn-ghost{
    background:transparent;color:var(--text-1);border-color:var(--line-strong);
  }
  .btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
  .btn-sm{padding:8px 16px;font-size:14px}

  .link-arrow{color:var(--text-2);font-size:14px;font-weight:600;border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
  .link-arrow:hover{color:var(--primary);border-bottom-color:var(--primary)}

  /* ============ BADGES ============ */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:4px 12px;border-radius:999px;
    font-size:12.5px;font-weight:600;line-height:1.6;
    background:rgba(255,255,255,.05);
    color:var(--text-2);
    border:1px solid var(--line);
    white-space:nowrap;
  }
  .badge-accent{color:var(--accent);border-color:rgba(108,140,255,.4);background:rgba(108,140,255,.12)}
  .badge-primary{color:var(--primary);border-color:rgba(33,212,168,.4);background:var(--primary-soft)}
  .badge-warn{color:var(--warn);border-color:rgba(255,176,32,.4);background:rgba(255,176,32,.1)}

  /* ============ HERO ============ */
  .hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
  .hero-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;background-position:center;
    opacity:.5;
  }
  .hero-bg::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(6,9,16,.90) 0%,rgba(6,9,16,.94) 60%,var(--bg-0) 100%);
  }
  .hero-grid{
    position:absolute;inset:0;pointer-events:none;
    background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
    background-size:64px 64px;
    mask-image:radial-gradient(circle at 30% 30%,#000 0%,transparent 78%);
    -webkit-mask-image:radial-gradient(circle at 30% 30%,#000 0%,transparent 78%);
  }
  .hero-inner{position:relative;padding-top:48px;padding-bottom:52px;display:grid;gap:32px}
  @media (min-width:1024px){
    .hero-inner{grid-template-columns:1.15fr .85fr;align-items:center;padding-top:64px;padding-bottom:68px;gap:48px}
  }
  .hero h1{
    margin:16px 0 0;
    font-size:clamp(28px,4vw,46px);
    line-height:1.18;font-weight:800;letter-spacing:-.01em;
    color:var(--text-1);
  }
  .hero-sub{font-size:16px;line-height:1.8;color:var(--text-2);margin:16px 0 0;max-width:540px}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
  .hero-note{font-size:13px;color:var(--text-3);margin:18px 0 0;display:flex;align-items:center;gap:8px}
  .hero-note::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--primary);flex:0 0 auto}

  .hero-panel{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  @media (min-width:640px) and (max-width:1023px){.hero-panel{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .stat-card{
    padding:18px 16px;border-radius:var(--radius);
    background:rgba(15,23,37,.62);
    border:1px solid var(--line-strong);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    box-shadow:var(--shadow);
  }
  .stat-num{
    font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
    font-size:clamp(26px,3vw,34px);font-weight:700;line-height:1;
    color:var(--primary);letter-spacing:-.02em;
  }
  .stat-label{font-size:13px;color:var(--text-2);margin-top:10px}
  .stat-tip{font-size:12.5px;color:var(--text-3);margin-top:4px}

  /* ============ SECTION ============ */
  .section{padding:56px 0}
  @media (min-width:768px){.section{padding:76px 0}}
  @media (min-width:1024px){.section{padding:92px 0}}
  .section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  .section-head{display:grid;gap:14px;margin-bottom:34px}
  @media (min-width:900px){.section-head{grid-template-columns:1fr auto;align-items:end;gap:32px}}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
    font-size:12px;letter-spacing:.14em;text-transform:uppercase;
    color:var(--primary);margin-bottom:10px;
  }
  .eyebrow::before{content:"";width:18px;height:1px;background:var(--primary)}
  .section-head h2{
    margin:0;font-size:clamp(22px,2.4vw,32px);line-height:1.3;font-weight:700;color:var(--text-1);
  }
  .section-note{font-size:14px;color:var(--text-3);max-width:420px;margin:0;line-height:1.8}

  /* ============ STEPS ============ */
  .steps-layout{display:grid;gap:28px}
  @media (min-width:1024px){.steps-layout{grid-template-columns:240px minmax(0,1fr);gap:44px;align-items:start}}

  .step-index{
    display:flex;gap:8px;overflow-x:auto;
    padding-bottom:6px;scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  .step-index::-webkit-scrollbar{display:none}
  @media (min-width:1024px){
    .step-index{
      position:sticky;top:92px;
      flex-direction:column;gap:0;overflow:visible;padding-bottom:0;
      border-left:1px solid var(--line);
    }
  }
  .step-index-item{
    display:flex;align-items:center;gap:10px;
    padding:10px 16px;border-radius:10px;
    font-size:14px;color:var(--text-2);white-space:nowrap;
    background:rgba(255,255,255,.04);
    border:1px solid var(--line);
    transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
  }
  @media (min-width:1024px){
    .step-index-item{
      border:0;border-left:2px solid transparent;border-radius:0;
      background:transparent;padding:12px 18px;margin-left:-1px;white-space:normal;
    }
  }
  .step-index-item:hover{color:var(--text-1);border-color:var(--line-strong)}
  .step-index-item.active{color:var(--primary);background:var(--primary-soft);border-color:rgba(33,212,168,.45)}
  @media (min-width:1024px){
    .step-index-item.active{background:transparent;border-color:transparent;border-left-color:var(--primary)}
  }
  .step-index-item .num{
    font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
    font-size:13px;color:var(--text-3);letter-spacing:.04em;
  }
  .step-index-item.active .num{color:var(--primary)}

  .step-flow{display:grid;gap:18px}
  .step-card{
    position:relative;
    padding:24px 22px 24px 22px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    transition:border-color .2s var(--ease),transform .2s var(--ease);
  }
  .step-card:hover{border-color:rgba(33,212,168,.35);transform:translateY(-2px)}
  @media (min-width:640px){.step-card{padding:28px 28px 28px 68px}}
  .step-card::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:1px;
    background:repeating-linear-gradient(180deg,var(--line-strong) 0 5px,transparent 5px 11px);
    display:none;
  }
  @media (min-width:640px){.step-card::before{display:block;left:27px}}
  .step-badge{
    display:inline-flex;align-items:center;justify-content:center;
    width:34px;height:34px;border-radius:50%;
    font-family:ui-monospace,"JetBrains Mono",Consolas,monospace;
    font-size:13px;font-weight:700;
    color:var(--primary);background:var(--primary-soft);
    border:1px solid rgba(33,212,168,.45);
    margin-bottom:14px;
  }
  @media (min-width:640px){
    .step-badge{position:absolute;left:11px;top:28px;margin-bottom:0;z-index:2}
  }
  .step-card h3{margin:0 0 8px;font-size:19px;line-height:1.45;font-weight:600;color:var(--text-1)}
  .step-card p{margin:0;font-size:15px;line-height:1.85;color:var(--text-2)}
  .step-list{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:8px}
  .step-list li{position:relative;padding-left:18px;font-size:14px;color:var(--text-2);line-height:1.75}
  .step-list li::before{
    content:"";position:absolute;left:0;top:9px;width:6px;height:6px;
    background:var(--primary);border-radius:1px;opacity:.9;
  }
  .step-meta{
    display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;
    padding-top:14px;border-top:1px solid var(--line);
  }

  /* ============ WIDE IMAGE ============ */
  .wide-figure{margin:0;border-radius:var(--radius-sm);overflow:hidden;border:1px solid var(--line);background:var(--surface)}
  .wide-figure img{width:100%;aspect-ratio:16/6;object-fit:cover}
  @media (max-width:640px){.wide-figure img{aspect-ratio:16/9}}
  .wide-caption{display:block;padding:12px 16px;font-size:13px;color:var(--text-3);border-top:1px solid var(--line);background:rgba(255,255,255,.02)}

  /* ============ CHECKLIST ============ */
  .check-grid{display:grid;gap:14px}
  @media (min-width:720px){.check-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 28px}}
  .check-item{
    display:flex;gap:12px;align-items:flex-start;
    padding:14px 16px;border-radius:var(--radius-sm);
    background:rgba(255,255,255,.025);
    border:1px solid var(--line);
    transition:border-color .2s var(--ease),background .2s var(--ease);
  }
  .check-item:hover{border-color:rgba(33,212,168,.3);background:rgba(255,255,255,.045)}
  .check-icon{flex:0 0 auto;color:var(--primary);margin-top:3px}
  .check-item strong{display:block;color:var(--text-1);font-size:15px;font-weight:600;margin-bottom:2px}
  .check-item span.desc{font-size:14px;color:var(--text-2);line-height:1.75}

  /* ============ WARN BLOCK ============ */
  .warn-block{
    margin-top:26px;
    padding:22px 22px 22px 20px;
    border-left:3px solid var(--warn);
    border-radius:0 var(--radius-sm) var(--radius-sm) 0;
    background:rgba(255,176,32,.06);
  }
  .warn-block h3{margin:0 0 12px;font-size:17px;font-weight:600;color:var(--warn);display:flex;align-items:center;gap:8px}
  .warn-block ul{margin:0;padding-left:18px;display:grid;gap:8px}
  .warn-block li{font-size:14px;line-height:1.8;color:var(--text-2)}
  .warn-block li strong{color:var(--text-1);font-weight:600}

  /* ============ FAQ ============ */
  .faq-list{border-top:1px solid var(--line)}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 0;font-size:16px;font-weight:600;color:var(--text-1);
    transition:color .2s var(--ease);
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary:hover{color:var(--primary)}
  .faq-item summary::after{
    content:"+";flex:0 0 auto;
    width:24px;height:24px;display:grid;place-items:center;
    font-size:18px;font-weight:400;line-height:1;
    color:var(--text-2);border:1px solid var(--line);border-radius:8px;
    transition:color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
  }
  .faq-item[open] summary::after{content:"−";color:var(--primary);border-color:rgba(33,212,168,.5)}
  .faq-item[open] summary{color:var(--primary)}
  .faq-answer{padding:0 0 20px;font-size:14.5px;line-height:1.85;color:var(--text-2);max-width:860px}
  .faq-answer a{color:var(--primary);border-bottom:1px solid rgba(33,212,168,.4)}

  /* ============ CTA BAND ============ */
  .cta-band{
    display:grid;gap:20px;
    padding:28px 24px;
    border-radius:var(--radius);
    background:var(--surface);
    border:1px solid rgba(33,212,168,.28);
    box-shadow:0 0 0 1px rgba(33,212,168,.08),0 14px 40px rgba(0,0,0,.4);
  }
  @media (min-width:900px){
    .cta-band{grid-template-columns:1fr auto;align-items:center;padding:32px 36px;gap:32px}
  }
  .cta-band h2{margin:0 0 6px;font-size:clamp(20px,2.2vw,26px);font-weight:700;color:var(--text-1);line-height:1.35}
  .cta-band p{margin:0;font-size:14px;color:var(--text-2)}

  /* ============ FOOTER ============ */
  .site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:48px 0 0;margin-top:0}
  .footer-grid{display:grid;gap:32px;padding-bottom:36px}
  @media (min-width:760px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-brand .brand-mark{width:30px;height:30px}
  .footer-brand .brand-text{font-size:15px;font-weight:700;color:var(--text-1)}
  .footer-desc{margin:0;font-size:13.5px;line-height:1.85;color:var(--text-3);max-width:320px}
  .footer-title{margin:0 0 14px;font-size:14px;font-weight:600;color:var(--text-1)}
  .footer-links{display:flex;flex-direction:column;gap:10px}
  .footer-links a{font-size:13.5px;color:var(--text-2);transition:color .2s var(--ease)}
  .footer-links a:hover{color:var(--primary)}
  .footer-info{margin:0;font-size:13.5px;line-height:2;color:var(--text-3)}
  .footer-info strong{color:var(--text-2);font-weight:600}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
    padding:18px 0 24px;border-top:1px solid var(--line);
    font-size:12.5px;color:var(--text-3);
  }

  .reveal{opacity:0;transform:translateY(10px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
  .reveal.in{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important}
    .reveal{opacity:1;transform:none}
  }

/* roulang page: category3 */
:root{
    --bg-0:#060910;
    --bg-1:#0A1018;
    --surface:#0F1725;
    --line:rgba(255,255,255,0.09);
    --line-strong:rgba(255,255,255,0.16);
    --text-1:#EAF0F7;
    --text-2:#9BA9BC;
    --text-3:#6A7889;
    --primary:#21D4A8;
    --primary-deep:#12A585;
    --primary-soft:rgba(33,212,168,0.12);
    --accent:#6C8CFF;
    --warn:#FFB020;
    --radius-lg:16px;
    --radius-md:12px;
    --radius-sm:10px;
    --shadow:0 10px 28px rgba(0,0,0,.35);
    --ease:cubic-bezier(.2,.7,.3,1);
    --mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg-0);
    color:var(--text-2);
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
    font-size:16px;
    line-height:1.85;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    z-index:0;
    background-image:
      linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
      linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
    background-size:64px 64px;
    opacity:.7;
  }
  img{max-width:100%;display:block}
  a{color:var(--primary);text-decoration:none}
  button{font-family:inherit}
  h1,h2,h3,h4{margin:0;color:var(--text-1);letter-spacing:-.01em}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}

  :focus-visible{outline:2px solid rgba(33,212,168,.55);outline-offset:2px;border-radius:6px}

  .container{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding:0 20px;
    position:relative;
    z-index:1;
  }
  @media (min-width:768px){ .container{padding:0 28px} }

  /* ---------- HEADER ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(6,9,16,.82);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s var(--ease);
  }
  .site-header.scrolled{box-shadow:0 6px 20px rgba(0,0,0,.4)}
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    min-height:68px;
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    text-decoration:none;
    color:var(--text-1);
    font-weight:700;
    font-size:16px;
    line-height:1.2;
    white-space:nowrap;
    transition:color .2s var(--ease);
  }
  .brand:hover{color:var(--primary)}
  .brand-mark{
    display:grid;
    place-items:center;
    width:34px;
    height:34px;
    flex:0 0 auto;
    border-radius:10px;
    color:var(--primary);
    background:linear-gradient(180deg,rgba(33,212,168,.22),rgba(33,212,168,.06));
    border:1px solid rgba(33,212,168,.45);
  }
  .brand-text{display:inline-block}
  @media (max-width:420px){
    .brand{font-size:13.5px;gap:8px}
    .brand-mark{width:30px;height:30px}
  }

  .nav-chips{display:none;align-items:center;gap:6px}
  @media (min-width:1024px){ .nav-chips{display:flex} }

  .chip{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:6px;
    padding:7px 14px;
    border-radius:8px;
    font-size:13.5px;
    font-weight:500;
    line-height:1.4;
    white-space:nowrap;
    color:var(--text-2);
    background:rgba(255,255,255,.04);
    border:1px solid var(--line);
    text-decoration:none;
    cursor:pointer;
    transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
  }
  .chip:hover{color:var(--text-1);border-color:var(--line-strong);background:rgba(255,255,255,.06)}
  .chip.active{
    color:var(--primary);
    background:var(--primary-soft);
    border-color:rgba(33,212,168,.5);
  }
  .chip:active{transform:translateY(1px)}

  .header-actions{display:flex;align-items:center;gap:10px}

  .nav-toggle{
    display:grid;
    place-items:center;
    gap:4px;
    width:40px;
    height:40px;
    padding:0;
    background:transparent;
    border:1px solid var(--line-strong);
    border-radius:10px;
    color:var(--text-1);
    cursor:pointer;
    transition:border-color .2s var(--ease),color .2s var(--ease);
  }
  .nav-toggle:hover{border-color:var(--primary);color:var(--primary)}
  .nav-toggle span{display:block;width:16px;height:2px;border-radius:2px;background:currentColor;transition:transform .2s var(--ease),opacity .2s var(--ease)}
  .nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .nav-toggle.is-open span:nth-child(2){opacity:0}
  .nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  @media (min-width:1024px){ .nav-toggle{display:none} }

  .mobile-nav{
    display:none;
    border-top:1px solid var(--line);
    background:rgba(6,9,16,.97);
    padding:10px 20px 16px;
  }
  .mobile-nav.open{display:block}
  .mobile-nav a{
    display:block;
    position:relative;
    padding:12px 12px;
    border-radius:10px;
    font-size:15px;
    color:var(--text-2);
    text-decoration:none;
    transition:color .2s var(--ease),background .2s var(--ease);
  }
  .mobile-nav a:hover{color:var(--text-1);background:rgba(255,255,255,.05)}
  .mobile-nav a.active{color:var(--primary);background:var(--primary-soft)}
  .mobile-nav a.active::before{
    content:"";
    position:absolute;
    left:0;top:12px;bottom:12px;
    width:3px;
    border-radius:2px;
    background:var(--primary);
  }
  @media (min-width:1024px){ .mobile-nav{display:none !important} }

  /* ---------- BUTTONS ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:11px 20px;
    border-radius:var(--radius-sm);
    font-size:14.5px;
    font-weight:600;
    line-height:1.25;
    text-decoration:none;
    border:1px solid transparent;
    cursor:pointer;
    transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
  }
  .btn-primary{
    background:var(--primary);
    color:#05120E;
    box-shadow:0 0 0 1px rgba(33,212,168,.5),0 8px 26px rgba(33,212,168,.22);
  }
  .btn-primary:hover{
    background:var(--primary-deep);
    color:#04120D;
    box-shadow:0 0 0 1px rgba(33,212,168,.65),0 10px 30px rgba(33,212,168,.32);
  }
  .btn-primary:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(33,212,168,.4),0 4px 14px rgba(33,212,168,.2)}
  .btn-ghost{
    background:transparent;
    border-color:var(--line-strong);
    color:var(--text-1);
  }
  .btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
  .btn-sm{padding:8px 15px;font-size:13.5px;border-radius:9px}
  .link-plain{
    color:var(--text-2);
    font-size:13.5px;
    text-decoration:none;
    border-bottom:1px solid transparent;
    transition:color .2s var(--ease),border-color .2s var(--ease);
  }
  .link-plain:hover{color:var(--primary);border-bottom-color:rgba(33,212,168,.5)}

  /* ---------- PAGE HEAD ---------- */
  .page-head{
    position:relative;
    padding:42px 0 30px;
    border-bottom:1px solid var(--line);
    background-image:
      linear-gradient(180deg,rgba(6,9,16,.90),rgba(6,9,16,.97)),
      url('/assets/images/backpic/back-2.png');
    background-size:cover;
    background-position:center;
  }
  @media (min-width:768px){ .page-head{padding:54px 0 34px} }

  .head-top{
    display:flex;
    align-items:center;
    justify-content:space-between;
    flex-wrap:wrap;
    gap:12px;
  }
  .crumbs{
    display:flex;
    align-items:center;
    gap:8px;
    flex-wrap:wrap;
    font-size:13px;
    color:var(--text-3);
  }
  .crumbs a{color:var(--text-3);text-decoration:none;transition:color .2s var(--ease)}
  .crumbs a:hover{color:var(--primary)}
  .head-badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 12px;
    border-radius:999px;
    font-size:12.5px;
    color:var(--primary);
    background:var(--primary-soft);
    border:1px solid rgba(33,212,168,.4);
  }
  .page-head h1{
    margin-top:16px;
    font-size:clamp(25px,3.4vw,40px);
    font-weight:800;
    line-height:1.2;
    letter-spacing:-.01em;
    max-width:22ch;
  }
  .head-sub{
    margin-top:12px;
    max-width:62ch;
    font-size:15px;
    line-height:1.85;
    color:var(--text-2);
  }
  .filter-chips{
    display:flex;
    align-items:center;
    gap:8px;
    margin-top:24px;
    overflow-x:auto;
    padding-bottom:4px;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  .filter-chips::-webkit-scrollbar{display:none}

  /* ---------- SECTION ---------- */
  .section{padding:48px 0}
  @media (min-width:768px){ .section{padding:64px 0} }
  .section-tight{padding-top:0}
  @media (min-width:768px){ .section-tight{padding-top:0} }

  /* ---------- FAQ LAYOUT ---------- */
  .faq-layout{display:grid;grid-template-columns:1fr;gap:26px}
  @media (min-width:1024px){
    .faq-layout{grid-template-columns:4fr 8fr;gap:36px;align-items:start}
  }

  .index-panel{position:static}
  @media (min-width:1024px){ .index-panel{position:sticky;top:92px} }

  .index-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    padding:20px;
    box-shadow:var(--shadow);
  }
  .index-title{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:14px;
    font-weight:600;
    color:var(--text-1);
    margin-bottom:4px;
  }
  .index-title::before{
    content:"";
    width:3px;height:14px;border-radius:2px;background:var(--primary);
  }
  .index-hint{font-size:12.5px;line-height:1.7;color:var(--text-3);margin-bottom:14px}
  .index-list li + li{border-top:1px solid var(--line)}
  .index-list a{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:10px;
    padding:11px 2px;
    font-size:13.5px;
    color:var(--text-2);
    text-decoration:none;
    transition:color .2s var(--ease),padding-left .2s var(--ease);
  }
  .index-list a:hover{color:var(--primary);padding-left:6px}
  .index-count{
    font-family:var(--mono);
    font-size:11.5px;
    color:var(--text-3);
    padding:1px 8px;
    border-radius:999px;
    border:1px solid var(--line);
    background:rgba(255,255,255,.04);
    flex:0 0 auto;
  }
  .index-list a:hover .index-count{color:var(--primary);border-color:rgba(33,212,168,.4)}

  .side-figure{
    margin:22px 0 0;
    border-radius:var(--radius-md);
    overflow:hidden;
    border:1px solid var(--line);
    background:var(--surface);
  }
  .side-figure img{width:100%;height:148px;object-fit:cover}
  .side-figure figcaption{
    font-size:12px;
    line-height:1.6;
    color:var(--text-3);
    padding:10px 12px;
    border-top:1px solid var(--line);
    text-align:center;
  }

  /* ---------- FAQ GROUPS ---------- */
  .faq-group + .faq-group{margin-top:34px}
  .group-title{
    display:flex;
    align-items:center;
    gap:10px;
    font-size:17px;
    font-weight:600;
    line-height:1.5;
    color:var(--text-1);
    margin-bottom:14px;
    scroll-margin-top:92px;
  }
  .group-title::before{
    content:"";
    width:3px;height:16px;border-radius:2px;background:var(--primary);
    flex:0 0 auto;
  }
  .group-title .count{
    font-family:var(--mono);
    font-size:11.5px;
    font-weight:500;
    color:var(--text-3);
    padding:2px 9px;
    border-radius:999px;
    border:1px solid var(--line);
    background:rgba(255,255,255,.04);
  }

  .qa-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:14px;
    padding:18px 20px;
    transition:border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .qa-card + .qa-card{margin-top:12px}
  .qa-card:hover{
    border-color:rgba(33,212,168,.35);
    transform:translateY(-2px);
    box-shadow:var(--shadow);
  }
  .qa-q{
    display:flex;
    gap:10px;
    align-items:flex-start;
    font-size:16.5px;
    font-weight:600;
    line-height:1.55;
    color:var(--text-1);
    margin-bottom:8px;
  }
  .qa-q::before{
    content:"";
    width:6px;height:6px;
    border-radius:2px;
    background:var(--primary);
    margin-top:11px;
    flex:0 0 auto;
  }
  .qa-a{
    font-size:14.5px;
    line-height:1.85;
    color:var(--text-2);
    padding-left:16px;
  }
  .qa-link{
    display:inline-flex;
    align-items:center;
    gap:6px;
    margin:10px 0 0 16px;
    font-size:13px;
    color:var(--primary);
    text-decoration:none;
    border-bottom:1px solid rgba(33,212,168,.35);
    padding-bottom:1px;
    transition:border-color .2s var(--ease),color .2s var(--ease);
  }
  .qa-link:hover{color:var(--primary-deep);border-bottom-color:var(--primary)}

  /* ---------- CTA BAR ---------- */
  .cta-bar{
    display:flex;
    flex-direction:column;
    gap:18px;
    padding:24px;
    border-radius:18px;
    border:1px solid rgba(33,212,168,.28);
    background:linear-gradient(180deg,rgba(33,212,168,.08),rgba(15,23,37,.7));
    box-shadow:0 0 0 1px rgba(33,212,168,.10),0 14px 36px rgba(0,0,0,.35);
  }
  @media (min-width:768px){
    .cta-bar{flex-direction:row;align-items:center;justify-content:space-between;padding:26px 30px}
  }
  .cta-bar h2{
    font-size:19px;
    font-weight:700;
    line-height:1.4;
    margin-bottom:6px;
  }
  .cta-bar p{font-size:14px;line-height:1.8;color:var(--text-2);max-width:56ch}
  .cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;flex:0 0 auto}

  /* ---------- FOOTER ---------- */
  .site-footer{
    margin-top:24px;
    border-top:1px solid var(--line);
    background:var(--bg-1);
    padding:46px 0 24px;
    position:relative;
    z-index:1;
  }
  .footer-grid{display:grid;grid-template-columns:1fr;gap:30px}
  @media (min-width:640px){ .footer-grid{grid-template-columns:1fr 1fr} }
  @media (min-width:1024px){ .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px} }

  .footer-brand{
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:12px;
    color:var(--text-1);
    font-weight:700;
    font-size:15.5px;
    line-height:1.3;
  }
  .footer-desc{font-size:13.5px;line-height:1.8;color:var(--text-3);max-width:34ch}
  .footer-title{font-size:14px;font-weight:600;color:var(--text-1);margin-bottom:12px}
  .footer-links{display:flex;flex-direction:column;gap:9px}
  .footer-links a{
    width:fit-content;
    font-size:13.5px;
    color:var(--text-2);
    text-decoration:none;
    transition:color .2s var(--ease);
  }
  .footer-links a:hover{color:var(--primary)}
  .footer-info{font-size:13px;line-height:1.9;color:var(--text-3)}
  .footer-info strong{color:var(--text-2);font-weight:600}
  .footer-bottom{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    justify-content:space-between;
    margin-top:34px;
    padding-top:18px;
    border-top:1px solid var(--line);
    font-size:12px;
    line-height:1.7;
    color:var(--text-3);
  }