/* roulang page: index */
/* ============ 1. 设计变量 ============ */
:root{
  --ui-bg:#0A0912;
  --ui-surface:#12101E;
  --ui-surface-2:#1B1830;
  --ui-input:#0E0D18;
  --ui-line:rgba(255,255,255,.08);
  --ui-line-strong:rgba(255,255,255,.16);
  --ui-primary:#6D5BFF;
  --ui-primary-deep:#4A38D6;
  --ui-primary-soft:rgba(109,91,255,.14);
  --ui-primary-tint:rgba(109,91,255,.06);
  --ui-accent:#2FD9B8;
  --ui-gold:#E8C46A;
  --ui-danger:#FF6B6B;
  --ui-text:#F4F3F8;
  --ui-text-2:#B9B6C9;
  --ui-text-3:#8A87A0;
  --font-display:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC",system-ui,-apple-system,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --r-badge:999px;
  --shadow-soft:0 18px 40px -24px rgba(0,0,0,.7);
  --sp-section:96px;
  --ease:200ms cubic-bezier(.2,.7,.3,1);
  --bs-primary:var(--ui-primary);
  --bs-body-bg:var(--ui-bg);
  --bs-body-color:var(--ui-text);
  --bs-border-color:var(--ui-line);
  --bs-link-color:var(--ui-primary);
  --bs-link-hover-color:var(--ui-primary-deep);
  --bs-font-sans-serif:var(--font-body);
}
/* ============ 2. Reset 与基础排版 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ui-bg);
  color:var(--ui-text);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ui-primary);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--ui-primary-deep);}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--ui-text);letter-spacing:0;margin:0;}
h1{font-size:clamp(34px,5.2vw,58px);line-height:1.28;font-weight:700;}
h2{font-size:clamp(26px,3.4vw,34px);line-height:1.32;font-weight:600;}
h3{font-size:21px;line-height:1.35;font-weight:600;}
p{margin:0;color:var(--ui-text-2);line-height:1.9;}
ul{margin:0;padding:0;list-style:none;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
:focus{outline:none;}
:focus-visible{outline:2px solid var(--ui-primary);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(109,91,255,.35);color:#fff;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;}
@media (min-width:1600px){.container{max-width:1280px;}}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
/* ============ 3. 通用组件层 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);
  padding:13px 24px;
  font-size:15px;font-weight:600;line-height:1.2;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--ease),border-color var(--ease),transform var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--ui-primary);color:#fff;border-color:var(--ui-primary);
}
.btn-primary:hover{background:var(--ui-primary-deep);border-color:var(--ui-primary-deep);color:#fff;transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;color:var(--ui-text);border-color:var(--ui-line-strong);
}
.btn-ghost:hover{border-color:var(--ui-primary);color:var(--ui-primary);transform:translateY(-2px);}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-block{width:100%;}
.badge-pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 13px;border-radius:var(--r-badge);
  background:var(--ui-primary-soft);color:#BDB4FF;
  font-size:12px;font-weight:500;letter-spacing:0;line-height:1.4;
}
.badge-gold{background:rgba(232,196,106,.14);color:var(--ui-gold);}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ui-accent);display:inline-block;flex:0 0 auto;}
.section{padding:var(--sp-section) 0;}
.section-line{border-top:1px solid var(--ui-line);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap;}
.sec-head h2{position:relative;padding-left:16px;}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:4px;height:20px;background:var(--ui-primary);border-radius:2px;
}
.sec-desc{margin-top:10px;font-size:15px;color:var(--ui-text-3);max-width:640px;padding-left:16px;}
.starfield{
  background-image:radial-gradient(rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:22px 22px;
}
/* ============ 4. 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(10,9,18,.86);
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease);
}
.site-header.is-stuck{background:rgba(10,9,18,.92);border-bottom-color:var(--ui-line);}
.nav-main{
  position:relative;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  min-height:72px;gap:16px;
}
.nav-list{display:flex;align-items:center;gap:28px;}
.nav-list--right{justify-content:flex-end;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ui-text-2);
  padding:6px 0;transition:color var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--ui-primary);transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease);
}
.nav-link:hover{color:var(--ui-text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ui-primary);}
.nav-link.is-active::after{transform:scaleX(1);}
.brand{display:inline-flex;align-items:center;gap:10px;justify-self:center;}
.brand-mark{width:22px;height:22px;flex:0 0 auto;}
.brand-name{
  font-family:var(--font-display);font-size:17px;font-weight:700;color:var(--ui-text);
  letter-spacing:0;line-height:1.2;white-space:nowrap;
}
.nav-toggle{
  display:none;position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:42px;height:38px;border:1px solid var(--ui-line);border-radius:var(--r-btn);
  background:transparent;cursor:pointer;padding:0;align-items:center;justify-content:center;
  flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--ui-text);border-radius:2px;transition:transform var(--ease),opacity var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(5.5px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg);}
.nav-panel{display:none;}
/* ============ 5. Hero ============ */
.hero{position:relative;padding:88px 0 0;border-bottom:1px solid var(--ui-line);overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:24px 24px;opacity:.6;pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;padding-bottom:72px;}
.hero h1{margin:20px 0 18px;}
.hero-sub{font-size:17px;color:var(--ui-text-2);max-width:560px;line-height:1.85;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:14px;margin-top:34px;padding-top:22px;
  border-top:1px solid var(--ui-line);
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:13.5px;color:var(--ui-text-3);letter-spacing:-.01em;
  align-items:center;
}
.hero-facts span.sep{width:1px;height:12px;background:var(--ui-line-strong);display:inline-block;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;height:420px;object-fit:cover;border-radius:var(--r-img);
  border:1px solid var(--ui-line);background:var(--ui-surface-2);
  box-shadow:var(--shadow-soft);
}
.hero-tag{
  position:absolute;left:14px;bottom:14px;
  background:rgba(10,9,18,.86);border:1px solid var(--ui-line-strong);border-radius:var(--r-btn);
  padding:7px 12px;font-family:var(--font-mono);font-size:12px;color:var(--ui-text-2);
  letter-spacing:-.01em;
}
/* ============ 6. 指标看板 ============ */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);}
.metric{padding:0 28px;border-left:1px solid var(--ui-line);}
.metric:first-child{border-left:none;padding-left:0;}
.metric::before{content:"";display:block;width:24px;height:1px;background:var(--ui-line-strong);margin-bottom:22px;}
.metric-num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(36px,5vw,58px);line-height:1.05;font-weight:700;color:var(--ui-text);
  letter-spacing:-.02em;display:flex;align-items:baseline;gap:4px;
}
.metric-num.is-primary{color:var(--ui-primary);}
.metric-num.is-gold{color:var(--ui-gold);}
.metric-unit{font-family:var(--font-mono);font-size:14px;color:var(--ui-text-3);font-weight:500;letter-spacing:-.01em;}
.metric-label{margin-top:14px;font-size:14px;color:var(--ui-text-2);font-weight:500;}
.metric-note{margin-top:6px;font-size:13px;color:var(--ui-text-3);line-height:1.7;}
/* ============ 7. 编号行列表 ============ */
.rowlist{border-top:1px solid var(--ui-line);}
.rowitem{
  display:grid;grid-template-columns:64px 1fr 40px;align-items:center;gap:24px;
  min-height:96px;padding:22px 20px 22px 0;
  border-bottom:1px solid var(--ui-line);
  transition:background var(--ease);cursor:default;
}
.rowitem:hover{background:var(--ui-primary-tint);}
.row-num{
  font-family:var(--font-mono);font-size:15px;color:var(--ui-primary);opacity:.55;
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;
}
.row-body h3{font-size:20px;font-weight:600;transition:color var(--ease);}
.rowitem:hover .row-body h3{color:var(--ui-primary);}
.row-body p{margin-top:6px;font-size:15px;color:var(--ui-text-2);line-height:1.75;}
.row-arrow{
  justify-self:end;color:var(--ui-text-3);font-size:18px;line-height:1;
  transition:transform var(--ease),color var(--ease);
}
.rowitem:hover .row-arrow{transform:translateX(4px);color:var(--ui-primary);}
/* ============ 8. 对比条 ============ */
.compare-head{
  font-family:var(--font-mono);font-size:13px;color:var(--ui-text-3);
  letter-spacing:-.01em;margin-bottom:34px;
}
.compare-row{display:grid;grid-template-columns:160px 1fr 130px;align-items:center;gap:22px;margin-bottom:22px;}
.compare-row:last-child{margin-bottom:0;}
.compare-label{text-align:right;font-size:14.5px;color:var(--ui-text-2);}
.compare-track{position:relative;height:10px;border-radius:8px;background:rgba(255,255,255,.05);overflow:hidden;}
.compare-base{position:absolute;inset:0;width:100%;background:rgba(255,255,255,.12);border-radius:8px;}
.compare-fill{position:absolute;left:0;top:0;height:100%;border-radius:8px;background:var(--ui-primary);}
.compare-fill.is-accent{background:var(--ui-accent);}
.compare-value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:14px;
  color:var(--ui-text);letter-spacing:-.01em;text-align:right;
}
.compare-value em{font-style:normal;color:var(--ui-text-3);font-size:12.5px;margin-left:4px;}
/* ============ 9. 资讯网格（CMS） ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--ui-surface);border:1px solid var(--ui-line);border-radius:var(--r-card);
  overflow:hidden;transition:transform var(--ease),border-color var(--ease);
}
.news-card::before{
  content:"";position:absolute;left:0;top:0;height:2px;width:100%;
  background:var(--ui-primary);transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease);z-index:3;
}
.news-card:hover{transform:translateY(-2px);border-color:var(--ui-line-strong);}
.news-card:hover::before{transform:scaleX(1);}
.news-card.is-feature{grid-column:span 2;}
.news-thumb{position:relative;overflow:hidden;background:var(--ui-surface-2);}
.news-thumb img{width:100%;height:190px;object-fit:cover;transition:transform var(--ease);}
.news-card.is-feature .news-thumb img{height:260px;}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-cat{
  position:absolute;left:14px;top:14px;z-index:2;
  background:rgba(10,9,18,.86);border:1px solid var(--ui-line-strong);
  color:#BDB4FF;font-size:12px;padding:5px 11px;border-radius:var(--r-badge);
}
.news-body{padding:24px 26px 20px;display:flex;flex-direction:column;flex:1;}
.news-body h3{font-size:19px;line-height:1.5;font-weight:600;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--ease);}
.news-card:hover .news-body h3{color:var(--ui-primary);}
.news-card.is-feature .news-body h3{font-size:22px;}
.news-body p{
  margin-top:10px;font-size:14px;color:var(--ui-text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;
  font-family:var(--font-mono);font-size:13px;color:var(--ui-text-3);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;
  border-top:1px solid var(--ui-line);
}
.news-foot .go{color:var(--ui-text-3);transition:transform var(--ease),color var(--ease);}
.news-card:hover .news-foot .go{transform:translateX(4px);color:var(--ui-primary);}
.news-empty{
  min-height:200px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:16px;border:1px dashed var(--ui-line-strong);border-radius:var(--r-card);
  background:var(--ui-surface);text-align:center;padding:40px 24px;
}
.news-empty p{font-size:15px;color:var(--ui-text-2);}
.news-empty svg{width:32px;height:32px;stroke:var(--ui-text-3);}
/* ============ 10. FAQ ============ */
.faq-wrap{max-width:860px;}
.faq-item{border-bottom:1px solid var(--ui-line);background:transparent;border-radius:0;}
.faq-item:first-child{border-top:1px solid var(--ui-line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;background:transparent;border:0;text-align:left;
  font-size:17px;font-weight:600;color:var(--ui-text);line-height:1.6;
  transition:color var(--ease);
}
.faq-q:hover{color:var(--ui-primary);}
.faq-sign{position:relative;width:14px;height:14px;flex:0 0 auto;color:var(--ui-text-3);transition:color var(--ease);}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:currentColor;border-radius:2px;}
.faq-sign::before{left:0;top:6px;width:14px;height:2px;}
.faq-sign::after{left:6px;top:0;width:2px;height:14px;transition:transform var(--ease);}
.faq-q:not(.collapsed) .faq-sign{color:var(--ui-primary);}
.faq-q:not(.collapsed) .faq-sign::after{transform:scaleY(0);}
.faq-a{padding:0 0 22px;max-width:760px;font-size:15px;line-height:1.85;color:var(--ui-text-2);}
/* ============ 11. 转化表单 ============ */
.convert{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start;}
.convert-notes{margin-top:28px;border-top:1px solid var(--ui-line);}
.convert-notes li{
  padding:14px 0;border-bottom:1px solid var(--ui-line);
  font-family:var(--font-mono);font-size:13px;color:var(--ui-text-3);
  letter-spacing:-.01em;font-variant-numeric:tabular-nums;
}
.form-card{
  background:var(--ui-surface);border:1px solid var(--ui-line);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--shadow-soft);
}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.field{display:flex;flex-direction:column;gap:8px;}
.field-full{grid-column:1 / -1;}
.field label{font-size:13.5px;color:var(--ui-text-2);font-weight:500;}
.field input,.field textarea,.field select{
  width:100%;background:var(--ui-input);border:1px solid var(--ui-line);
  border-radius:var(--r-btn);padding:14px 16px;color:var(--ui-text);
  font-size:15px;line-height:1.6;transition:border-color var(--ease),box-shadow var(--ease);
}
.field textarea{min-height:110px;resize:vertical;}
.field input::placeholder,.field textarea::placeholder{color:rgba(138,135,160,.6);}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--ui-primary);
  box-shadow:0 0 0 3px rgba(109,91,255,.12);
}
.field.has-error input,.field.has-error textarea{border-color:var(--ui-danger);}
.field-err{font-size:13px;color:var(--ui-danger);display:none;}
.field.has-error .field-err{display:block;}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--ui-text-2);line-height:1.7;}
.check-row input{width:16px;height:16px;margin-top:4px;accent-color:var(--ui-primary);}
.form-tip{margin-top:14px;font-size:13px;color:var(--ui-text-3);text-align:center;}
/* ============ 12. 页脚 ============ */
.site-footer{
  border-top:1px solid var(--ui-line);margin-top:0;position:relative;
  background:var(--ui-bg);padding-top:72px;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:180px;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:24px 24px;pointer-events:none;
}
.footer-grid{
  position:relative;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:56px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--ui-text-2);line-height:1.8;max-width:280px;}
.footer-legal{margin-top:14px;font-size:12.5px;color:var(--ui-text-3);line-height:1.7;}
.footer-col h4{
  font-family:var(--font-mono);font-size:13px;font-weight:500;color:var(--ui-text-3);
  letter-spacing:-.01em;margin-bottom:18px;
}
.footer-col li{margin-bottom:11px;}
.footer-col a{font-size:14.5px;color:var(--ui-text-2);}
.footer-col a:hover{color:var(--ui-primary);}
.footer-bottom{
  position:relative;border-top:1px solid var(--ui-line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--ui-text-3);}
.footer-bottom .legal{font-size:12.5px;color:var(--ui-text-3);}
/* ============ 13. 动效层 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 320ms cubic-bezier(.2,.7,.3,1),transform 320ms cubic-bezier(.2,.7,.3,1);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}
/* ============ 14. 响应式断点 ============ */
@media (max-width:1199px){
  .compare-row{grid-template-columns:130px 1fr 110px;}
}
@media (max-width:991px){
  .section{padding:72px 0;}
  .nav-main{grid-template-columns:auto 1fr auto;min-height:64px;}
  .nav-toggle{display:flex;}
  .nav-list--left{display:none;}
  .nav-list--right{gap:0;justify-content:flex-end;}
  .nav-list--right li:not(.nav-cta){display:none;}
  .brand-name{font-size:15.5px;}
  .nav-panel{
    display:block;overflow:hidden;max-height:0;
    border-top:1px solid transparent;background:rgba(10,9,18,.98);
    transition:max-height 240ms cubic-bezier(.2,.7,.3,1);
  }
  .nav-panel.is-open{max-height:420px;border-top-color:var(--ui-line);}
  .nav-panel ul{padding:0 24px;}
  .nav-panel li{border-bottom:1px solid var(--ui-line);}
  .nav-panel a{display:block;font-size:18px;line-height:52px;color:var(--ui-text-2);}
  .nav-panel a.is-active{color:var(--ui-primary);}
  .nav-panel .panel-cta{padding:18px 24px 24px;border-bottom:none;}
  .hero{padding-top:56px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;padding-bottom:56px;}
  .hero-media img{height:260px;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .metric{padding:0 20px 26px;border-left:none;border-bottom:1px solid var(--ui-line);}
  .metric:nth-child(odd){padding-left:0;border-right:1px solid var(--ui-line);}
  .metric:nth-child(even){padding-right:0;}
  .metric:first-child{padding-left:0;}
  .metric:nth-last-child(-n+2){border-bottom:none;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .news-card.is-feature{grid-column:span 1;}
  .news-card.is-feature .news-thumb img{height:200px;}
  .news-card.is-feature .news-body h3{font-size:19px;}
  .convert{grid-template-columns:1fr;gap:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .section{padding:56px 0;}
  .container{padding:0 16px;}
  .sec-head{margin-bottom:28px;}
  .hero-grid{gap:28px;}
  .hero-media img{height:220px;}
  .hero-actions .btn{width:100%;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .metric{padding:0 14px 22px;}
  .rowitem{grid-template-columns:44px 1fr 24px;gap:14px;padding:20px 12px 20px 0;}
  .row-body h3{font-size:18px;}
  .compare-row{grid-template-columns:1fr;gap:10px;margin-bottom:26px;}
  .compare-label{text-align:left;}
  .compare-value{text-align:right;}
  .news-grid{grid-template-columns:1fr;}
  .form-card{padding:20px;}
  .form-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .brand-name{font-size:14.5px;}
  .metrics{grid-template-columns:1fr;}
  .metric{padding:0 0 22px !important;border-right:none !important;border-bottom:1px solid var(--ui-line) !important;}
  .metric:last-child{border-bottom:none !important;}
  .hero h1{font-size:32px;}
}

/* roulang page: article */
:root{
  --bs-primary:#6D5BFF;
  --bs-body-bg:#0A0912;
  --bs-body-color:#F4F3F8;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-link-color:#6D5BFF;
  --bs-link-hover-color:#4A38D6;
  --bs-font-sans-serif:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;

  --ui-bg:#0A0912;
  --ui-surface:#12101E;
  --ui-surface-2:#1B1830;
  --ui-line:rgba(255,255,255,.08);
  --ui-line-strong:rgba(255,255,255,.16);
  --ui-primary:#6D5BFF;
  --ui-primary-deep:#4A38D6;
  --ui-accent:#2FD9B8;
  --ui-gold:#E8C46A;
  --ui-text:#F4F3F8;
  --ui-text-2:#B9B6C9;
  --ui-text-3:#8A87A0;

  --font-display:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,monospace;

  --radius-card:16px;
  --radius-ctrl:10px;
  --radius-img:14px;
  --shadow-soft:0 18px 40px -24px rgba(0,0,0,.7);
  --ease:200ms cubic-bezier(.2,.7,.3,1);
  --section-pad:96px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--ui-bg);
  color:var(--ui-text);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ui-primary);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--ui-primary-deep);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--ui-text);letter-spacing:0;margin:0;line-height:1.32;font-weight:600;}
p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--ui-primary);outline-offset:2px;}
::selection{background:rgba(109,91,255,.35);color:#fff;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
@media (min-width:1600px){
  .container{max-width:1280px;}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 22px;
  border-radius:var(--radius-ctrl);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  cursor:pointer;
  transition:background var(--ease),border-color var(--ease),color var(--ease),transform var(--ease);
}
.btn-primary{
  background:var(--ui-primary);
  color:#fff;
  border-color:var(--ui-primary);
}
.btn-primary:hover{
  background:var(--ui-primary-deep);
  border-color:var(--ui-primary-deep);
  color:#fff;
  transform:translateY(-1px);
}
.btn-outline{
  background:transparent;
  color:var(--ui-text);
  border-color:var(--ui-line-strong);
}
.btn-outline:hover{
  border-color:var(--ui-primary);
  color:var(--ui-primary);
}
.btn-sm{padding:9px 16px;font-size:13.5px;}
.btn-block{width:100%;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease);
}
.site-header.is-stuck{
  background:rgba(10,9,18,.92);
  border-bottom-color:var(--ui-line);
}
.nav-main{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:24px;
  min-height:76px;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:26px;
}
.nav-list--left{justify-self:start;}
.nav-list--right{justify-self:end;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ui-text-2);
  padding:6px 0;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--ui-primary);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--ease);
}
.nav-link:hover{color:var(--ui-text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ui-primary);}
.nav-link.is-active::after{transform:scaleX(1);}
.brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  justify-self:center;
  color:var(--ui-text);
}
.brand:hover{color:var(--ui-text);}
.brand-mark{width:22px;height:22px;flex:none;}
.brand-name{
  font-family:var(--font-display);
  font-size:16.5px;
  font-weight:700;
  white-space:nowrap;
}
.nav-cta{margin-left:8px;}
.nav-toggle{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:42px;height:42px;
  padding:0;
  background:transparent;
  border:1px solid var(--ui-line);
  border-radius:var(--radius-ctrl);
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  width:18px;height:1.6px;
  margin:0 auto;
  background:var(--ui-text);
  transition:transform var(--ease),opacity var(--ease);
}
.nav-panel{display:none;border-top:1px solid var(--ui-line);background:var(--ui-bg);}
.nav-panel.is-open{display:block;}
.nav-panel ul li{border-bottom:1px solid var(--ui-line);}
.nav-panel ul li a{
  display:block;
  text-align:left;
  font-size:18px;
  line-height:52px;
  padding:0 24px;
  color:var(--ui-text-2);
}
.nav-panel ul li a:hover,
.nav-panel ul li a.is-active{color:var(--ui-primary);}
.panel-cta{padding:20px 24px 26px;}

/* ---------- 面包屑 ---------- */
.breadcrumb-nav{
  padding:20px 0;
  font-size:13px;
  color:var(--ui-text-3);
}
.breadcrumb-nav ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;}
.breadcrumb-nav li{display:flex;align-items:center;gap:10px;}
.breadcrumb-nav li + li::before{
  content:"";
  width:14px;height:1px;
  background:var(--ui-line-strong);
}
.breadcrumb-nav a{color:var(--ui-text-3);}
.breadcrumb-nav a:hover{color:var(--ui-primary);}
.breadcrumb-nav .current{color:var(--ui-primary);}

/* ---------- 文章头 ---------- */
.article-head{padding:24px 0 34px;border-bottom:1px solid var(--ui-line);}
.article-head .container{max-width:1036px;}
.badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:500;
  letter-spacing:0;
  background:rgba(109,91,255,.14);
  color:var(--ui-primary);
}
.badge .dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--ui-accent);
}
.article-title{
  font-size:clamp(26px,3.6vw,40px);
  line-height:1.32;
  margin:18px 0 18px;
  font-weight:700;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:13px;
  color:var(--ui-text-3);
  letter-spacing:-.01em;
}
.article-meta .sep{width:1px;height:12px;background:var(--ui-line-strong);}

/* ---------- 封面 ---------- */
.article-cover{margin:40px 0 0;}
.article-cover .container{max-width:1036px;}
.article-cover img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border-radius:var(--radius-img);
  border:1px solid var(--ui-line);
  background:
    radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px) 0 0/18px 18px,
    var(--ui-surface);
}

/* ---------- 正文布局 ---------- */
.article-main{padding:56px 0 var(--section-pad);}
.article-layout{max-width:760px;margin:0 auto;}
.toc{display:none;}
.toc-title{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--ui-text-3);
  margin-bottom:14px;
  letter-spacing:-.01em;
}
.toc-list li{margin-bottom:10px;}
.toc-list a{
  display:block;
  padding-left:12px;
  border-left:2px solid var(--ui-line);
  font-size:14px;
  line-height:1.6;
  color:var(--ui-text-3);
  transition:color var(--ease),border-color var(--ease);
}
.toc-list a:hover{color:var(--ui-text);}
.toc-list a.is-current{
  color:var(--ui-primary);
  border-left-color:var(--ui-primary);
}

.article-body{color:var(--ui-text-2);}
.article-body p{margin:0 0 20px;font-size:16.5px;line-height:1.9;}
.article-body h2{
  position:relative;
  padding-left:14px;
  margin:56px 0 18px;
  font-size:clamp(22px,2.6vw,28px);
  line-height:1.35;
  color:var(--ui-text);
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.2em;
  width:4px;height:1em;
  border-radius:2px;
  background:var(--ui-primary);
}
.article-body h3{margin:36px 0 14px;font-size:21px;color:var(--ui-text);}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px;line-height:1.85;font-size:16.5px;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;}
.article-body li::marker{color:var(--ui-primary);}
.article-body blockquote{
  margin:26px 0;
  padding:18px 22px;
  border-left:3px solid var(--ui-primary);
  background:rgba(109,91,255,.06);
  border-radius:0 10px 10px 0;
  color:var(--ui-text-2);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body a{
  color:var(--ui-primary);
  border-bottom:1px solid rgba(109,91,255,.5);
}
.article-body a:hover{border-bottom-color:var(--ui-primary);}
.article-body img{
  width:100%;
  margin:26px 0 10px;
  border-radius:var(--radius-img);
  border:1px solid var(--ui-line);
}
.article-body figure{margin:26px 0;}
.article-body figcaption{
  margin-top:10px;
  text-align:center;
  font-size:13px;
  color:var(--ui-text-3);
}
.article-body table{
  display:block;
  width:100%;
  max-width:100%;
  overflow-x:auto;
  border-collapse:collapse;
  margin:26px 0;
  font-size:15px;
}
.article-body th,.article-body td{
  padding:12px 14px;
  border-bottom:1px solid var(--ui-line);
  text-align:left;
  white-space:nowrap;
}
.article-body th{
  color:var(--ui-text);
  font-weight:600;
  border-bottom-color:var(--ui-line-strong);
}
.article-body code{
  font-family:var(--font-mono);
  font-size:14px;
  padding:2px 6px;
  border-radius:6px;
  background:var(--ui-surface-2);
  color:var(--ui-accent);
}
.article-body hr{border:0;border-top:1px solid var(--ui-line);margin:40px 0;}

/* ---------- 空态 ---------- */
.article-empty{
  min-height:260px;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:16px;
  padding:56px 24px;
  border:1px solid var(--ui-line);
  border-radius:var(--radius-card);
  background:var(--ui-surface);
  text-align:center;
}
.article-empty svg{width:32px;height:32px;stroke:var(--ui-text-3);}
.article-empty p{font-size:15px;color:var(--ui-text-2);}

/* ---------- 文末区 ---------- */
.article-foot{margin-top:64px;padding-top:36px;border-top:1px solid var(--ui-line);}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;
  align-items:center;
  padding:6px 13px;
  border-radius:999px;
  border:1px solid var(--ui-line);
  font-size:12.5px;
  color:var(--ui-text-2);
  transition:border-color var(--ease),color var(--ease);
}
.tag:hover{border-color:var(--ui-primary);color:var(--ui-primary);}

.section-head{display:flex;align-items:center;gap:12px;margin:56px 0 24px;}
.section-head::before{
  content:"";
  width:4px;height:20px;
  border-radius:2px;
  background:var(--ui-primary);
}
.section-head h2{font-size:clamp(22px,2.6vw,28px);}

.related-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.card{
  display:flex;
  flex-direction:column;
  border:1px solid var(--ui-line);
  border-radius:var(--radius-card);
  background:var(--ui-surface);
  overflow:hidden;
  transition:transform var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--ui-line-strong);}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  background:
    radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px) 0 0/18px 18px,
    var(--ui-surface-2);
}
.card-media img{width:100%;height:100%;object-fit:cover;}
.card-media .badge{position:absolute;left:14px;top:14px;background:rgba(10,9,12,.72);color:var(--ui-text);}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:18px;line-height:1.5;}
.card-body p{font-size:14px;color:var(--ui-text-2);line-height:1.75;}
.card-foot{
  margin-top:auto;
  padding-top:14px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--ui-text-3);
  font-variant-numeric:tabular-nums;
}
.card-foot .arrow{transition:transform var(--ease);}
.card:hover .card-foot .arrow{transform:translateX(4px);}

.back-home{
  margin-top:36px;
  display:flex;
  justify-content:center;
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  border-top:1px solid var(--ui-line);
  background:var(--ui-bg);
  padding:72px 0 0;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:160px;
  pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:20px 20px;
  opacity:.5;
}
.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:56px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--ui-text-2);line-height:1.8;max-width:300px;}
.footer-brand .footer-legal{margin-top:12px;font-size:12.5px;color:var(--ui-text-3);}
.footer-col h4{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:500;
  color:var(--ui-text-3);
  letter-spacing:-.01em;
  margin-bottom:18px;
}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{font-size:14px;color:var(--ui-text-2);}
.footer-col ul li a:hover{color:var(--ui-primary);}
.footer-bottom{
  position:relative;
  border-top:1px solid var(--ui-line);
  padding:22px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--ui-text-3);}
.footer-bottom .legal{font-size:12.5px;}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 320ms cubic-bezier(.2,.7,.3,1),transform 320ms cubic-bezier(.2,.7,.3,1);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{transition-duration:.01ms !important;}
}

/* ---------- 响应式 ---------- */
@media (min-width:1200px){
  .article-layout{
    display:grid;
    grid-template-columns:220px minmax(0,760px);
    gap:56px;
    max-width:1036px;
    margin:0 auto;
  }
  .toc{
    display:block;
    position:sticky;
    top:104px;
    align-self:start;
    max-height:calc(100vh - 140px);
    overflow-y:auto;
  }
}

@media (max-width:1199.98px){
  .article-main{padding-top:40px;}
}

@media (max-width:991.98px){
  :root{--section-pad:72px;}
  .nav-main{grid-template-columns:auto 1fr auto;gap:16px;min-height:66px;}
  .nav-toggle{display:flex;}
  .nav-list--left{display:none;}
  .nav-list--right{display:flex;gap:0;}
  .nav-list--right li:not(.nav-cta){display:none;}
  .brand{justify-self:center;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:767.98px){
  :root{--section-pad:56px;}
  body{font-size:16px;}
  .container{padding:0 16px;}
  .article-body p,.article-body ul,.article-body ol{font-size:16px;}
  .related-grid{grid-template-columns:1fr;gap:16px;}
  .article-title{font-size:24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .article-cover{margin-top:28px;}
  .card-body{padding:20px;}
}

@media (max-width:519.98px){
  .brand-name{font-size:15px;}
  .nav-cta .btn{padding:8px 12px;font-size:12.5px;}
  .article-meta{font-size:12.5px;gap:10px;}
}

/* roulang page: category1 */
/* ============ 1. 设计变量 ============ */
:root{
  --bs-primary:#6D5BFF;
  --bs-body-bg:#0A0912;
  --bs-body-color:#F4F3F8;
  --bs-border-color:rgba(255,255,255,.08);

  --ui-bg:#0A0912;
  --ui-surface:#12101E;
  --ui-surface-2:#1B1830;
  --ui-line:rgba(255,255,255,.08);
  --ui-line-strong:rgba(255,255,255,.16);
  --ui-primary:#6D5BFF;
  --ui-primary-deep:#4A38D6;
  --ui-accent:#2FD9B8;
  --ui-gold:#E8C46A;
  --ui-text:#F4F3F8;
  --ui-text-2:#B9B6C9;
  --ui-text-3:#8A87A0;
  --ui-danger:#FF6B6B;

  --font-display:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,monospace;

  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:14px;
  --radius-bar:8px;
  --radius-pill:999px;

  --shadow-soft:0 18px 40px -24px rgba(0,0,0,.7);
  --ease:200ms cubic-bezier(.2,.7,.3,1);
  --section-pad:96px;
  --container-pad:24px;
}

/* ============ 2. Reset 与基础排版 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ui-bg);
  color:var(--ui-text);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color var(--ease),border-color var(--ease);}
p{margin:0 0 18px;}
h1,h2,h3,h4{
  font-family:var(--font-display);
  line-height:1.3;
  margin:0;
  letter-spacing:0;
  font-weight:700;
  color:var(--ui-text);
}
ul{list-style:none;margin:0;padding:0;}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
:focus{outline:none;}
:focus-visible{outline:2px solid var(--ui-primary);outline-offset:2px;}
::selection{background:rgba(109,91,255,.35);}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:var(--container-pad);
  padding-right:var(--container-pad);
}

/* ============ 3. 通用组件 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  border:1px solid transparent;
  transition:background var(--ease),border-color var(--ease),color var(--ease),transform var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--ui-primary);
  color:#fff;
}
.btn-primary:hover{background:var(--ui-primary-deep);transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;
  color:var(--ui-text);
  border-color:var(--ui-line-strong);
}
.btn-ghost:hover{border-color:var(--ui-primary);color:var(--ui-primary);transform:translateY(-2px);}
.btn-sm{padding:9px 16px;font-size:14px;}
.btn-block{width:100%;}

.badge-pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:var(--radius-pill);
  font-size:12px;
  font-weight:500;
  letter-spacing:.02em;
  background:rgba(109,91,255,.14);
  color:var(--ui-primary);
  border:1px solid rgba(109,91,255,.22);
}
.badge-pill .dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--ui-accent);
  display:inline-block;
}
.badge-gold{
  background:rgba(232,196,106,.13);
  color:var(--ui-gold);
  border-color:rgba(232,196,106,.25);
}

.section{padding:var(--section-pad) 0;}
.section-line{border-top:1px solid var(--ui-line);}

.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;}
.sec-title{
  position:relative;
  padding-left:16px;
  font-size:clamp(26px,3.4vw,34px);
  font-weight:700;
}
.sec-title::before{
  content:"";
  position:absolute;
  left:0;top:.28em;
  width:4px;height:20px;
  border-radius:2px;
  background:var(--ui-primary);
}
.sec-sub{margin-top:10px;color:var(--ui-text-2);font-size:15px;max-width:640px;}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}

/* ============ 4. 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1040;
  background:rgba(10,9,18,.86);
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease);
}
.site-header.is-stuck{
  background:rgba(10,9,18,.92);
  border-bottom:1px solid var(--ui-line);
}
.nav-main{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:24px;
  min-height:72px;
}
.nav-list{display:flex;align-items:center;gap:28px;}
.nav-list--right{justify-content:flex-end;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ui-text-2);
  padding:6px 0;
  transition:color var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:0;height:2px;
  background:var(--ui-primary);
  border-radius:2px;
  transition:width var(--ease);
}
.nav-link:hover{color:var(--ui-text);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--ui-primary);}
.nav-link.is-active::after{width:100%;}
.nav-cta{margin-left:6px;}

.brand{display:inline-flex;align-items:center;gap:10px;justify-self:center;}
.brand-mark{width:22px;height:22px;flex:0 0 auto;}
.brand-name{
  font-family:var(--font-display);
  font-size:17px;
  font-weight:700;
  color:var(--ui-text);
  white-space:nowrap;
}
.brand:hover .brand-name{color:var(--ui-primary);}

.nav-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:var(--radius-btn);
  border:1px solid var(--ui-line);
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
}
.nav-toggle span{
  display:block;
  width:16px;height:1.6px;
  background:var(--ui-text);
  border-radius:2px;
  transition:transform var(--ease),opacity var(--ease);
}
.nav-toggle.is-open span:nth-child(1){transform:translateY(5.6px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-5.6px) rotate(-45deg);}

.nav-panel{
  display:none;
  border-top:1px solid var(--ui-line);
  background:rgba(10,9,18,.98);
}
.nav-panel.is-open{display:block;}
.nav-panel ul li{border-bottom:1px solid var(--ui-line);}
.nav-panel ul li a{
  display:block;
  padding:0 20px;
  line-height:52px;
  font-size:18px;
  font-weight:500;
  color:var(--ui-text-2);
}
.nav-panel ul li a.is-active{color:var(--ui-primary);}
.nav-panel .panel-cta{padding:18px 20px 22px;}

/* ============ 5. 内页横幅 ============ */
.page-banner{
  padding:72px 0 56px;
  border-bottom:1px solid var(--ui-line);
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:22px 22px;
  background-position:0 0;
}
.banner-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
}
.banner-copy h1{
  font-size:clamp(30px,4vw,44px);
  margin:18px 0 16px;
}
.banner-copy .lead{
  font-size:17px;
  color:var(--ui-text-2);
  max-width:520px;
  margin:0;
  line-height:1.8;
}
.banner-media{position:relative;}
.banner-media img{
  width:100%;
  height:220px;
  object-fit:cover;
  border-radius:var(--radius-img);
  border:1px solid var(--ui-line);
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:18px 18px;
}
.media-tag{
  position:absolute;
  left:12px;bottom:12px;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  background:rgba(10,9,18,.82);
  border:1px solid var(--ui-line-strong);
  font-family:var(--font-mono);
  font-size:11.5px;
  color:var(--ui-text-2);
  letter-spacing:.04em;
}

/* ============ 6. 面包屑 ============ */
.breadcrumb-bar{
  padding:20px 0;
  font-size:13px;
  color:var(--ui-text-3);
  border-bottom:1px solid var(--ui-line);
}
.breadcrumb-bar ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;list-style:none;margin:0;padding:0;}
.breadcrumb-bar li::after{content:"/";margin-left:8px;color:rgba(255,255,255,.18);}
.breadcrumb-bar li:last-child::after{display:none;}
.breadcrumb-bar a{color:var(--ui-text-3);}
.breadcrumb-bar a:hover{color:var(--ui-text);}
.breadcrumb-bar .current{color:var(--ui-primary);}

/* ============ 7. 要点看板 ============ */
.metrics{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0;
}
.metric{
  padding:0 32px;
  border-left:1px solid var(--ui-line);
}
.metric:first-child{border-left:none;padding-left:0;}
.metric::before{
  content:"";
  display:block;
  width:24px;height:1px;
  background:var(--ui-line-strong);
  margin-bottom:22px;
}
.metric-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:clamp(36px,5vw,56px);
  line-height:1.05;
  font-weight:700;
  letter-spacing:-.01em;
  color:var(--ui-text);
}
.metric:first-child .metric-num{color:var(--ui-primary);}
.metric:last-child .metric-num{color:var(--ui-gold);}
.metric-unit{font-size:14px;color:var(--ui-text-3);margin-left:6px;font-weight:400;}
.metric-label{margin-top:12px;font-size:14px;color:var(--ui-text-2);}
.metric-desc{margin-top:6px;font-size:13px;color:var(--ui-text-3);line-height:1.7;}

/* ============ 8. 编号行列表 ============ */
.rowlist{border-top:1px solid var(--ui-line);}
.rowlist-item{
  display:grid;
  grid-template-columns:72px 260px 1fr 32px;
  align-items:center;
  gap:24px;
  min-height:104px;
  padding:20px 16px;
  border-bottom:1px solid var(--ui-line);
  transition:background var(--ease),border-color var(--ease);
}
.rowlist-item:hover{background:rgba(109,91,255,.06);}
.rowlist-item:hover .rowlist-title{color:var(--ui-primary);}
.rowlist-item:hover .rowlist-arrow{transform:translateX(4px);color:var(--ui-primary);}
.rowlist-no{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:15px;
  font-weight:600;
  color:var(--ui-primary);
  opacity:.55;
  letter-spacing:-.01em;
}
.rowlist-title{font-size:20px;font-weight:600;transition:color var(--ease);}
.rowlist-desc{font-size:15px;color:var(--ui-text-2);line-height:1.75;}
.rowlist-arrow{
  color:var(--ui-text-3);
  font-size:18px;
  line-height:1;
  transition:transform var(--ease),color var(--ease);
}
.rowlist-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;}
.tag{
  display:inline-block;
  padding:3px 10px;
  border-radius:var(--radius-pill);
  font-size:12px;
  color:var(--ui-text-3);
  border:1px solid var(--ui-line);
  background:var(--ui-surface);
}

/* ============ 9. FAQ ============ */
.acc{border-top:1px solid var(--ui-line);}
.acc-item{border-bottom:1px solid var(--ui-line);}
.acc-head{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:20px 4px;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--ui-text);
  transition:color var(--ease);
}
.acc-head:hover{color:var(--ui-primary);}
.acc-icon{
  position:relative;
  width:16px;height:16px;
  flex:0 0 auto;
  transition:transform var(--ease),color var(--ease);
  color:var(--ui-text-3);
}
.acc-icon::before,.acc-icon::after{
  content:"";
  position:absolute;
  background:currentColor;
  border-radius:2px;
}
.acc-icon::before{left:0;top:7px;width:16px;height:1.6px;}
.acc-icon::after{left:7px;top:0;width:1.6px;height:16px;}
.acc-head[aria-expanded="true"] .acc-icon{transform:rotate(45deg);color:var(--ui-primary);}
.acc-head[aria-expanded="true"]{color:var(--ui-primary);}
.acc-body{padding:0 4px 22px;max-width:760px;}
.acc-body p{font-size:15px;line-height:1.9;color:var(--ui-text-2);margin:0;}

/* ============ 10. 简化转化表单 ============ */
.convert-grid{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:56px;
  align-items:start;
}
.convert-copy h2{
  position:relative;
  padding-left:16px;
  font-size:clamp(26px,3.4vw,34px);
  margin-bottom:16px;
}
.convert-copy h2::before{
  content:"";
  position:absolute;left:0;top:.28em;
  width:4px;height:20px;border-radius:2px;background:var(--ui-primary);
}
.convert-copy p{color:var(--ui-text-2);font-size:15px;}
.convert-points{margin-top:28px;border-top:1px solid var(--ui-line);}
.convert-points li{
  display:flex;
  gap:12px;
  padding:14px 0;
  border-bottom:1px solid var(--ui-line);
  font-family:var(--font-mono);
  font-size:13.5px;
  color:var(--ui-text-3);
  line-height:1.7;
}
.convert-points li span:first-child{color:var(--ui-primary);}

.form-card{
  background:var(--ui-surface);
  border:1px solid var(--ui-line);
  border-radius:var(--radius-card);
  padding:32px;
  box-shadow:var(--shadow-soft);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.field{display:flex;flex-direction:column;gap:8px;margin-bottom:20px;}
.field label{font-size:13.5px;color:var(--ui-text-2);}
.field input,.field textarea{
  background:#0E0D18;
  border:1px solid var(--ui-line);
  border-radius:var(--radius-btn);
  padding:14px 16px;
  font-size:15px;
  color:var(--ui-text);
  transition:border-color var(--ease),box-shadow var(--ease);
  width:100%;
}
.field textarea{min-height:110px;resize:vertical;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:rgba(138,135,160,.6);}
.field input:focus,.field textarea:focus{
  border-color:var(--ui-primary);
  box-shadow:0 0 0 3px rgba(109,91,255,.12);
  outline:none;
}
.field.has-error input,.field.has-error textarea{border-color:var(--ui-danger);}
.field-error{font-size:13px;color:var(--ui-danger);display:none;}
.field.has-error .field-error{display:block;}
.form-note{font-size:12.5px;color:var(--ui-text-3);margin-top:14px;line-height:1.7;}

/* ============ 11. 互链区块 ============ */
.link-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.link-card{
  display:block;
  background:var(--ui-surface);
  border:1px solid var(--ui-line);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.link-card:hover{transform:translateY(-2px);border-color:var(--ui-line-strong);box-shadow:var(--shadow-soft);}
.link-card img{
  width:100%;height:180px;object-fit:cover;
  border:none;border-radius:0;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:18px 18px;
}
.link-card-body{padding:24px 28px 28px;}
.link-card-body h3{font-size:19px;margin-bottom:10px;}
.link-card-body p{font-size:14.5px;color:var(--ui-text-2);margin:0 0 16px;line-height:1.8;}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:600;
  color:var(--ui-primary);
}
.link-card:hover .link-more span{transform:translateX(4px);}
.link-more span{transition:transform var(--ease);}

/* ============ 12. 页脚 ============ */
.site-footer{
  border-top:1px solid var(--ui-line);
  background:var(--ui-bg);
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:22px 22px;
  padding:72px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:56px;
}
.footer-brand p{font-size:14px;color:var(--ui-text-2);margin:18px 0 10px;max-width:280px;line-height:1.8;}
.footer-legal{font-size:12.5px;color:var(--ui-text-3);}
.footer-col h4{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:500;
  color:var(--ui-text-3);
  letter-spacing:.02em;
  margin-bottom:18px;
}
.footer-col ul li{margin-bottom:12px;}
.footer-col ul li a{font-size:14.5px;color:var(--ui-text-2);}
.footer-col ul li a:hover{color:var(--ui-primary);}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0 28px;
  border-top:1px solid var(--ui-line);
}
.footer-bottom p{font-size:13px;color:var(--ui-text-3);margin:0;}
.footer-bottom .legal{font-size:12.5px;max-width:560px;text-align:right;}

/* ============ 13. 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 320ms cubic-bezier(.2,.7,.3,1),transform 320ms cubic-bezier(.2,.7,.3,1);}
.reveal.is-in{opacity:1;transform:none;}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;transition:none;}
  *{transition-duration:1ms !important;animation-duration:1ms !important;}
  .btn:hover,.link-card:hover{transform:none;}
}

/* ============ 14. 响应式 ============ */
@media (min-width:1600px){
  .container{max-width:1280px;}
}
@media (max-width:1024px){
  :root{--section-pad:72px;}
  .banner-grid{grid-template-columns:1fr;gap:32px;}
  .banner-media img{height:220px;}
  .metrics{grid-template-columns:repeat(3,1fr);}
  .metric{padding:0 20px;}
  .rowlist-item{grid-template-columns:56px 200px 1fr 24px;gap:18px;}
  .convert-grid{grid-template-columns:1fr;gap:40px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-grid .footer-col:last-child{grid-column:span 3;}
}
@media (max-width:991px){
  .nav-main{grid-template-columns:auto 1fr auto;min-height:64px;gap:12px;}
  .nav-toggle{display:flex;}
  .nav-list--left,.nav-list--right{display:none;}
  .brand{justify-self:center;}
  .nav-cta-desktop{display:none;}
  .site-header .nav-main .nav-list--right{display:none;}
}
@media (max-width:768px){
  :root{--section-pad:56px;--container-pad:16px;}
  body{font-size:16px;}
  .banner-copy h1{font-size:30px;}
  .metrics{grid-template-columns:1fr;gap:0;}
  .metric{padding:22px 0;border-left:none;border-bottom:1px solid var(--ui-line);}
  .metric:last-child{border-bottom:none;}
  .rowlist-item{
    grid-template-columns:1fr auto;
    grid-template-areas:"no arrow" "title arrow" "desc desc";
    gap:8px 16px;
    padding:22px 4px;
  }
  .rowlist-no{grid-area:no;font-size:13.5px;}
  .rowlist-title{grid-area:title;font-size:19px;}
  .rowlist-desc{grid-area:desc;font-size:14.5px;}
  .rowlist-arrow{grid-area:arrow;align-self:center;}
  .link-grid{grid-template-columns:1fr;}
  .form-row{grid-template-columns:1fr;}
  .form-card{padding:22px 20px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .footer-grid .footer-col:last-child{grid-column:span 2;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .footer-bottom .legal{text-align:left;}
}
@media (max-width:520px){
  .brand-name{font-size:15px;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:16px;}
  .link-card img{height:150px;}
}

/* roulang page: category2 */
/* ============ 1. 设计变量 ============ */
:root{
  --bs-primary:#6D5BFF;
  --bs-primary-rgb:109,91,255;
  --bs-body-bg:#0A0912;
  --bs-body-color:#F4F3F8;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-link-color:#6D5BFF;
  --bs-link-hover-color:#8C7DFF;
  --bs-font-sans-serif:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;

  --ui-bg:#0A0912;
  --ui-surface:#12101E;
  --ui-surface-2:#1B1830;
  --ui-input:#0E0D18;
  --ui-line:rgba(255,255,255,.08);
  --ui-line-strong:rgba(255,255,255,.16);
  --ui-primary:#6D5BFF;
  --ui-primary-deep:#4A38D6;
  --ui-accent:#2FD9B8;
  --ui-gold:#E8C46A;
  --ui-danger:#FF6B6B;
  --ui-text:#F4F3F8;
  --ui-text-2:#B9B6C9;
  --ui-text-3:#8A87A0;

  --font-display:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,monospace;

  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --r-badge:999px;
  --r-bar:8px;

  --shadow-soft:0 18px 40px -24px rgba(0,0,0,.7);
  --ease:cubic-bezier(.2,.7,.3,1);
  --dur:200ms;
  --nav-h:72px;
}

/* ============ 2. Reset 与基础排版 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ui-bg);
  color:var(--ui-text);
  font-family:var(--font-body);
  font-size:16.5px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);border:1px solid var(--ui-line);object-fit:cover}
h1,h2,h3,h4,h5{font-family:var(--font-display);font-weight:600;line-height:1.3;color:var(--ui-text);margin:0;letter-spacing:0}
h1{font-size:clamp(30px,4.4vw,46px);line-height:1.28}
h2{font-size:clamp(26px,3.4vw,34px);line-height:1.3}
h3{font-size:21px;line-height:1.35}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
a{color:var(--ui-primary);text-decoration:none;transition:color var(--dur) var(--ease)}
a:hover{color:#8C7DFF}
ul{list-style:none;margin:0;padding:0}
::selection{background:rgba(109,91,255,.35);color:#fff}
:focus-visible{outline:2px solid var(--ui-primary);outline-offset:2px;border-radius:4px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}

/* ============ 3. 通用组件 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.divider-line{height:1px;background:var(--ui-line);border:0;margin:0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-body);font-size:15px;font-weight:500;line-height:1;
  padding:14px 24px;border-radius:var(--r-btn);border:1px solid transparent;
  cursor:pointer;transition:all var(--dur) var(--ease);text-align:center;
}
.btn-primary{background:var(--ui-primary);color:#fff;border-color:var(--ui-primary)}
.btn-primary:hover,.btn-primary:focus{background:var(--ui-primary-deep);border-color:var(--ui-primary-deep);color:#fff}
.btn-outline{background:transparent;color:var(--ui-text);border-color:var(--ui-line-strong)}
.btn-outline:hover,.btn-outline:focus{background:rgba(109,91,255,.08);border-color:var(--ui-primary);color:var(--ui-primary)}
.btn-sm{padding:11px 18px;font-size:14px}
.btn-block{display:flex;width:100%}
.btn .arrow{transition:transform var(--dur) var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}

.badge{
  display:inline-flex;align-items:center;gap:7px;
  font-size:12px;font-weight:500;line-height:1;padding:7px 12px;border-radius:var(--r-badge);
  background:rgba(109,91,255,.14);color:#A79BFF;border:1px solid rgba(109,91,255,.24);
}
.badge--gold{background:rgba(232,196,106,.12);color:var(--ui-gold);border-color:rgba(232,196,106,.26)}
.dot{width:6px;height:6px;border-radius:50%;background:var(--ui-accent);display:inline-block;flex:none}

.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{display:flex;align-items:center;gap:14px}
.section-head h2::before{content:"";width:4px;height:20px;background:var(--ui-primary);border-radius:2px;flex:none}
.section-head .sub{font-size:14.5px;color:var(--ui-text-3);margin:10px 0 0 18px}

.card{
  background:var(--ui-surface);border:1px solid var(--ui-line);border-radius:var(--r-card);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--ui-line-strong)}

/* ============ 4. 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;background:var(--ui-bg);
  border-bottom:1px solid transparent;transition:background var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.site-header.is-stuck{background:rgba(10,9,18,.92);border-bottom-color:var(--ui-line)}
.nav-main{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  min-height:var(--nav-h);gap:16px;
}
.nav-list{display:flex;align-items:center;gap:28px}
.nav-list--left{justify-content:flex-start}
.nav-list--right{justify-content:flex-end}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ui-text-2);
  padding:6px 0;display:inline-block;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--ui-primary);
  transition:width var(--dur) var(--ease);
}
.nav-link:hover{color:var(--ui-text)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--ui-primary)}
.nav-link.is-active::after{width:100%}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ui-text);justify-self:center}
.brand:hover{color:var(--ui-text)}
.brand-mark{width:22px;height:22px;border:0;border-radius:0;flex:none}
.brand-name{font-family:var(--font-display);font-size:17px;font-weight:600;white-space:nowrap}
.nav-cta{margin-left:4px}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;padding:0 10px;background:transparent;
  border:1px solid var(--ui-line);border-radius:var(--r-btn);cursor:pointer;
}
.nav-toggle span{display:block;height:1.5px;background:var(--ui-text);border-radius:2px;transition:all var(--dur) var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.nav-panel{
  display:none;border-top:1px solid var(--ui-line);background:var(--ui-surface);
  padding:8px 24px 20px;
}
.nav-panel.is-open{display:block}
.nav-panel ul li{border-bottom:1px solid var(--ui-line)}
.nav-panel ul li:last-child{border-bottom:0}
.nav-panel ul a{
  display:block;font-size:18px;line-height:52px;color:var(--ui-text-2);font-weight:500;
}
.nav-panel ul a.is-active{color:var(--ui-primary)}
.panel-cta{padding-top:16px}

/* ============ 5. 页面专属：小尺寸横幅 ============ */
.page-banner{
  position:relative;
  padding:56px 0 64px;
  border-bottom:1px solid var(--ui-line);
  background-color:var(--ui-bg);
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:22px 22px;
}
.page-banner .banner-grid{
  display:grid;grid-template-columns:1.45fr .85fr;gap:48px;align-items:center;
}
.banner-copy h1{margin:18px 0 16px}
.banner-copy .lead{font-size:17px;color:var(--ui-text-2);max-width:560px;margin-bottom:24px}
.banner-meta{
  display:flex;flex-wrap:wrap;gap:24px;font-family:var(--font-mono);font-size:13.5px;color:var(--ui-text-3);
}
.banner-meta span{display:inline-flex;align-items:center;gap:8px}
.banner-figure{position:relative}
.banner-figure img{
  width:100%;height:220px;border-radius:var(--r-img);border:1px solid var(--ui-line);
}
.banner-tag{
  position:absolute;left:14px;bottom:14px;
  font-family:var(--font-mono);font-size:12px;padding:6px 10px;border-radius:6px;
  background:rgba(10,9,18,.82);border:1px solid var(--ui-line-strong);color:var(--ui-text-2);
}
.crumbs{font-size:13px;color:var(--ui-text-3);padding:20px 0}
.crumbs a{color:var(--ui-text-3)}
.crumbs a:hover{color:var(--ui-primary)}
.crumbs .sep{margin:0 8px;color:rgba(255,255,255,.2)}
.crumbs .current{color:var(--ui-primary)}

/* ============ 6. 要点看板 ============ */
.stat-board{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ui-line)}
.stat{padding:36px 28px 30px;border-right:1px solid var(--ui-line)}
.stat:last-child{border-right:0}
.stat::before{content:"";display:block;width:24px;height:1px;background:var(--ui-primary);opacity:.9;margin-bottom:22px}
.stat .num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:clamp(36px,5vw,58px);line-height:1;font-weight:600;color:var(--ui-text);letter-spacing:-.01em;
}
.stat .num.is-primary{color:var(--ui-primary)}
.stat .unit{font-size:14px;color:var(--ui-text-3);margin-left:6px;font-family:var(--font-body)}
.stat .label{font-size:14px;color:var(--ui-text-2);margin-top:16px}
.stat .note{font-size:13px;color:var(--ui-text-3);margin-top:6px;line-height:1.7}

/* ============ 7. 不等宽卡片区 ============ */
.sec-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.sec-card{
  background:var(--ui-surface);border:1px solid var(--ui-line);border-radius:var(--r-card);
  padding:28px;position:relative;overflow:hidden;
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);
  display:flex;flex-direction:column;
}
.sec-card::before{
  content:"";position:absolute;top:0;left:0;height:2px;width:0;background:var(--ui-primary);
  transition:width 260ms var(--ease);
}
.sec-card:hover{transform:translateY(-2px);border-color:var(--ui-line-strong)}
.sec-card:hover::before{width:100%}
.sec-card.span7{grid-column:span 7}
.sec-card.span5{grid-column:span 5}
.sec-card.span12{grid-column:span 12}
.sec-card .card-figure{margin:-28px -28px 24px;border-radius:0}
.sec-card .card-figure img{width:100%;height:210px;border-radius:0;border:0;border-bottom:1px solid var(--ui-line)}
.sec-card .idx{
  font-family:var(--font-mono);font-size:13px;color:var(--ui-primary);opacity:.6;margin-bottom:14px;
}
.sec-card h3{margin-bottom:12px}
.sec-card p{font-size:15px;color:var(--ui-text-2);line-height:1.85}
.sec-list{margin-top:18px;border-top:1px solid var(--ui-line);padding-top:16px}
.sec-list li{
  font-size:14.5px;color:var(--ui-text-2);line-height:1.75;padding-left:18px;position:relative;margin-bottom:8px;
}
.sec-list li:last-child{margin-bottom:0}
.sec-list li::before{
  content:"";position:absolute;left:0;top:11px;width:5px;height:5px;border-radius:50%;background:var(--ui-accent);
}
.horizontal-card{display:grid;grid-template-columns:1.1fr 1fr;gap:0;padding:0}
.horizontal-card .hc-body{padding:28px}
.horizontal-card .hc-media{position:relative;min-height:240px}
.horizontal-card .hc-media img{height:100%;border-radius:0;border:0;border-left:1px solid var(--ui-line)}
.hc-tag{
  position:absolute;top:16px;left:16px;font-size:12px;padding:6px 10px;border-radius:var(--r-badge);
  background:rgba(10,9,18,.8);border:1px solid var(--ui-line-strong);color:var(--ui-text-2);
}

/* ============ 8. FAQ ============ */
.faq-wrap{max-width:880px}
.accordion-item{background:transparent;border:0;border-bottom:1px solid var(--ui-line)}
.accordion-button{
  background:transparent;color:var(--ui-text);font-family:var(--font-body);
  font-size:17px;font-weight:600;line-height:1.6;padding:20px 44px 20px 0;
  box-shadow:none !important;border-radius:0 !important;
}
.accordion-button:hover{color:var(--ui-primary)}
.accordion-button:not(.collapsed){color:var(--ui-primary);background:transparent}
.accordion-button::after{display:none}
.accordion-button .faq-sign{
  position:absolute;right:6px;top:50%;width:14px;height:14px;transform:translateY(-50%);
  transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);
}
.accordion-button .faq-sign::before,
.accordion-button .faq-sign::after{
  content:"";position:absolute;background:var(--ui-text-2);border-radius:2px;
}
.accordion-button .faq-sign::before{left:0;top:6px;width:14px;height:1.5px}
.accordion-button .faq-sign::after{left:6px;top:0;width:1.5px;height:14px}
.accordion-button:not(.collapsed) .faq-sign{transform:translateY(-50%) rotate(45deg)}
.accordion-button:not(.collapsed) .faq-sign::before,
.accordion-button:not(.collapsed) .faq-sign::after{background:var(--ui-primary)}
.accordion-body{
  padding:0 0 24px;font-size:15px;line-height:1.85;color:var(--ui-text-2);max-width:760px;
}

/* ============ 9. 表单 ============ */
.cta-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:56px;align-items:start}
.cta-points{margin-top:26px;border-top:1px solid var(--ui-line);padding-top:20px}
.cta-points li{
  font-family:var(--font-mono);font-size:13.5px;color:var(--ui-text-3);
  padding:8px 0;border-bottom:1px solid var(--ui-line);display:flex;justify-content:space-between;gap:16px;
}
.cta-points li:last-child{border-bottom:0}
.form-panel{
  background:var(--ui-surface);border:1px solid var(--ui-line);border-radius:var(--r-card);padding:32px;box-shadow:var(--shadow-soft);
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.field{margin-bottom:20px}
.field label{display:block;font-size:13.5px;color:var(--ui-text-2);margin-bottom:8px;font-weight:500}
.form-control,.form-select{
  width:100%;background:var(--ui-input);border:1px solid var(--ui-line);border-radius:var(--r-btn);
  color:var(--ui-text);font-family:var(--font-body);font-size:15px;padding:14px 16px;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.form-control::placeholder{color:rgba(138,135,160,.6)}
.form-control:focus,.form-select:focus{
  background:var(--ui-input);color:var(--ui-text);border-color:var(--ui-primary);
  box-shadow:0 0 0 3px rgba(109,91,255,.12);outline:none;
}
.form-select{appearance:none;background-image:none}
.form-check{display:flex;align-items:flex-start;gap:10px;margin-bottom:22px}
.form-check input{
  width:17px;height:17px;margin-top:3px;flex:none;accent-color:var(--ui-primary);cursor:pointer;
}
.form-check label{font-size:13.5px;color:var(--ui-text-2);line-height:1.7;margin:0}
.form-hint{font-size:13px;color:var(--ui-text-3);margin-top:8px}

/* ============ 10. 互链与返回 ============ */
.cross-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.cross-card{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:28px;background:var(--ui-surface-2);border:1px solid var(--ui-line);border-radius:var(--r-card);
  transition:transform var(--dur) var(--ease),border-color var(--dur) var(--ease);color:var(--ui-text);
}
.cross-card:hover{transform:translateY(-2px);border-color:var(--ui-line-strong);color:var(--ui-text)}
.cross-card h3{font-size:19px;margin-bottom:8px}
.cross-card p{font-size:14px;color:var(--ui-text-3);margin:0}
.cross-card .arrow{font-family:var(--font-mono);font-size:20px;color:var(--ui-primary);transition:transform var(--dur) var(--ease);flex:none}
.cross-card:hover .arrow{transform:translateX(4px)}

/* ============ 11. 页脚 ============ */
.site-footer{
  position:relative;border-top:1px solid var(--ui-line);margin-top:0;padding-top:72px;
  background-color:var(--ui-bg);
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:22px 22px;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:56px}
.footer-brand .brand{justify-self:flex-start;margin-bottom:18px}
.footer-brand p{font-size:14px;color:var(--ui-text-3);line-height:1.8;max-width:300px}
.footer-legal{font-size:12.5px;color:rgba(138,135,160,.8);margin-top:14px}
.footer-col h4{
  font-family:var(--font-mono);font-size:13px;font-weight:500;color:var(--ui-text-3);
  letter-spacing:-.01em;margin-bottom:18px;
}
.footer-col ul li{margin-bottom:11px}
.footer-col ul a{font-size:14px;color:var(--ui-text-2)}
.footer-col ul a:hover{color:var(--ui-primary)}
.footer-bottom{
  border-top:1px solid var(--ui-line);padding:22px 0 32px;
  display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;
}
.footer-bottom p{font-size:13px;color:var(--ui-text-3);margin:0}
.footer-bottom .legal{font-size:12.5px;color:rgba(138,135,160,.8)}

/* ============ 12. 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 320ms var(--ease),transform 320ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:1ms !important;animation-duration:1ms !important}
  .reveal{opacity:1;transform:none}
}

/* ============ 13. 响应式 ============ */
@media (min-width:1600px){
  .container{max-width:1280px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .page-banner{padding:44px 0 52px}
  .page-banner .banner-grid{grid-template-columns:1fr;gap:32px}
  .banner-figure img{height:220px}
  .sec-card.span7,.sec-card.span5{grid-column:span 6}
  .horizontal-card{grid-template-columns:1fr}
  .horizontal-card .hc-media img{border-left:0;border-top:1px solid var(--ui-line);height:220px}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:991.98px){
  .nav-main{grid-template-columns:auto 1fr auto;min-height:64px}
  .nav-toggle{display:flex}
  .nav-list--left,.nav-list--right{display:none}
  .brand{justify-self:center}
  .section{padding:64px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:16px}
  .stat-board{grid-template-columns:1fr 1fr}
  .stat{border-right:1px solid var(--ui-line);border-bottom:1px solid var(--ui-line)}
  .stat:nth-child(2n){border-right:0}
  .stat:last-child{border-bottom:0}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .page-banner{padding:32px 0 44px}
  .banner-copy h1{font-size:30px}
  .banner-copy .lead{font-size:16px}
  .banner-meta{gap:14px;flex-direction:column}
  .crumbs{padding:16px 0}
  .stat-board{grid-template-columns:1fr}
  .stat{border-right:0}
  .sec-grid{gap:16px}
  .sec-card{grid-column:span 12 !important;padding:20px}
  .sec-card .card-figure{margin:-20px -20px 20px}
  .sec-card .card-figure img{height:180px}
  .horizontal-card .hc-body{padding:20px}
  .form-panel{padding:22px}
  .form-row{grid-template-columns:1fr;gap:0}
  .btn{width:100%}
  .nav-cta .btn,.panel-cta .btn{width:100%}
  .cross-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:40px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .section-head h2::before{height:18px}
  .cta-points li{flex-direction:column;gap:4px}
}
@media (max-width:520px){
  h1{font-size:28px}
  h2{font-size:24px}
  .brand-name{font-size:15.5px}
  .banner-figure img{height:180px}
}