/* roulang page: index */
:root{
  --ink:#15121F;
  --ink-2:#241F33;
  --brand:#5A3FE0;
  --brand-dark:#4630C4;
  --brand-soft:#EFEBFF;
  --mint:#22C7A9;
  --accent:#FF7A45;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DC;
  --text:#2C2833;
  --text-muted:#6E6879;
  --radius-card:16px;
  --radius-block:24px;
  --radius-btn:12px;
  --shadow-1:0 8px 24px -12px rgba(21,18,31,.12);
  --shadow-2:0 16px 40px -16px rgba(90,63,224,.28);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease-out}
button,input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.anchor-offset{scroll-margin-top:132px}

/* ============ 通用组件 ============ */
.btn-primary,.btn-ghost,.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:all .2s ease-out;white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#F0692F;transform:translateY(-1px);box-shadow:0 12px 28px -10px rgba(255,122,69,.5)}
.btn-block{width:100%}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card)}
.card-hover{transition:transform .2s ease-out,box-shadow .2s ease-out;box-shadow:var(--shadow-1)}
.card-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;background:var(--brand-soft);
  color:var(--brand);font-size:13px;font-weight:600;line-height:1.6;
}
.badge-mint{background:rgba(34,199,169,.14);color:#12836E}
.section{padding:100px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-title{font-size:clamp(22px,3vw,34px);line-height:1.3;font-weight:700;color:var(--ink)}
.section-desc{margin-top:12px;font-size:16px;color:var(--text-muted);max-width:640px;line-height:1.85}
.eyebrow{font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.04em;margin-bottom:10px}
.text-link{color:var(--brand);font-size:15px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.text-link:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}
.arrow-link{color:var(--brand);font-size:14px;font-weight:600}
.arrow-link:hover{text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,241,.88);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{height:68px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:10px;flex-shrink:0;
  background:linear-gradient(135deg,var(--brand),#8A6BFF);
  display:flex;align-items:center;justify-content:center;color:#fff;
}
.brand-name{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:10px}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--text);padding:6px 0}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--brand)}
.nav-links a.active::after{transform:scaleX(1)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{position:relative;width:240px}
.search-box input{
  width:100%;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  padding:0 12px 0 36px;font-size:14px;color:var(--text);outline:none;transition:all .2s ease-out;
}
.search-box input::placeholder{color:#A39DAE}
.search-box input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(90,63,224,.12)}
.search-box svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-muted)}
.nav-ghost-btn{font-size:15px;font-weight:500;color:var(--text-muted);padding:10px 6px}
.nav-ghost-btn:hover{color:var(--brand)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;color:var(--ink);cursor:pointer;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* 移动抽屉 */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;z-index:90;
  background:var(--surface);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .28s ease-out;
  padding:22px 20px;overflow-y:auto;display:flex;flex-direction:column;gap:8px;
}
.drawer.open{transform:translateX(0)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(21,18,31,.42);z-index:80;opacity:0;visibility:hidden;
  transition:opacity .28s ease-out,visibility .28s ease-out;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;
  cursor:pointer;color:var(--ink);display:flex;align-items:center;justify-content:center;
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer-links{display:flex;flex-direction:column;gap:4px;margin:6px 0 16px}
.drawer-links a{padding:12px 10px;border-radius:10px;font-size:16px;font-weight:500;color:var(--text)}
.drawer-links a:hover{background:var(--brand-soft);color:var(--brand)}
.drawer-links a.active{background:var(--brand-soft);color:var(--brand)}
.drawer .search-box{width:100%;margin-bottom:12px}

/* ============ 吸顶锚点条 ============ */
.anchorbar{
  position:sticky;top:68px;z-index:50;height:52px;
  background:rgba(255,255,255,.9);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  opacity:0;visibility:hidden;transition:opacity .3s ease-out,visibility .3s ease-out;
}
.anchorbar.show{opacity:1;visibility:visible}
.anchorbar-inner{
  height:52px;display:flex;align-items:center;gap:8px;overflow-x:auto;scrollbar-width:none;
}
.anchorbar-inner::-webkit-scrollbar{display:none}
.anchorbar a{
  flex-shrink:0;font-size:14px;font-weight:600;color:var(--text-muted);
  padding:7px 14px;border-radius:999px;transition:all .2s ease-out;
}
.anchorbar a:hover{color:var(--brand);background:var(--brand-soft)}
.anchorbar a.current{background:var(--brand-soft);color:var(--brand)}

/* ============ Hero ============ */
.hero{position:relative;padding:64px 0 72px;overflow:hidden}
.hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:40px;
  background:linear-gradient(to bottom,var(--bg),transparent);pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:6fr 6fr;gap:52px;align-items:center}
.hero h1{
  font-size:clamp(28px,4.4vw,46px);line-height:1.25;font-weight:800;color:var(--ink);
  letter-spacing:-.01em;
}
.hero-sub{margin-top:20px;font-size:17px;line-height:1.9;color:var(--text-muted);max-width:560px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust{display:flex;flex-wrap:wrap;gap:38px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line)}
.trust-item .num{font-size:32px;font-weight:800;color:var(--brand);line-height:1.2}
.trust-item .lbl{font-size:14px;color:var(--text-muted);margin-top:4px}
.hero-visual{position:relative;border-radius:var(--radius-block);overflow:hidden;box-shadow:var(--shadow-2)}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover}
.hero-visual::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(140deg,rgba(90,63,224,.42),rgba(90,63,224,0) 62%);
}
.hero-visual .visual-badge{
  position:absolute;left:18px;bottom:18px;z-index:2;
  background:rgba(34,199,169,.94);color:#fff;font-size:13px;font-weight:600;
  padding:7px 14px;border-radius:999px;
}

/* ============ 卖点 bento ============ */
.bento{display:grid;grid-template-columns:2fr 1fr;grid-template-rows:auto auto auto;gap:18px}
.bento-main{
  grid-row:1 / span 3;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:38px;display:flex;flex-direction:column;
  box-shadow:var(--shadow-1);
}
.icon-box{
  width:48px;height:48px;border-radius:16px;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.bento-main h3{margin-top:22px;font-size:22px;font-weight:700;color:var(--ink);line-height:1.45}
.bento-main p{margin-top:14px;font-size:16px;line-height:1.9;color:var(--text-muted)}
.bento-main .text-link{margin-top:auto;padding-top:24px}
.bento-side{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 24px;display:flex;align-items:flex-start;gap:16px;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.bento-side:hover{transform:translateY(-3px);box-shadow:var(--shadow-1);border-color:#D9D2F5}
.bento-side .icon-box{width:40px;height:40px;border-radius:12px}
.bento-side h4{font-size:17px;font-weight:600;color:var(--ink);line-height:1.5}
.bento-side p{font-size:14px;color:var(--text-muted);margin-top:5px;line-height:1.7}

/* ============ 演示区 ============ */
.demo-grid{display:grid;grid-template-columns:5fr 6fr;gap:56px;align-items:center}
.demo-steps{margin-top:30px;display:flex;flex-direction:column;gap:22px}
.demo-step{display:flex;gap:16px;align-items:flex-start}
.step-num{
  width:28px;height:28px;border-radius:999px;background:var(--brand);color:#fff;
  font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center;
  flex-shrink:0;margin-top:5px;
}
.demo-step h4{font-size:17px;font-weight:600;color:var(--ink)}
.demo-step p{font-size:15px;color:var(--text-muted);line-height:1.8;margin-top:4px}
.demo-visual{
  position:relative;border-radius:20px;padding:6px;background:#fff;
  box-shadow:var(--shadow-2);
}
.demo-visual img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:16px}
.demo-visual .demo-badge{position:absolute;top:18px;right:18px;z-index:2}

/* ============ 证据区 ============ */
.proof-band{
  background:var(--ink);border-radius:var(--radius-block);padding:44px 40px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:28px;
}
.proof-cell .pnum{font-size:36px;font-weight:800;color:#fff;line-height:1.15}
.proof-cell .plabel{font-size:14px;color:var(--mint);margin-top:8px;font-weight:600}
.proof-cell .pdesc{font-size:14px;color:#B6B1C4;margin-top:4px;line-height:1.7}
.proof-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:30px}
.proof-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:30px;position:relative;box-shadow:var(--shadow-1)}
.proof-card .quote{font-size:44px;line-height:1;color:var(--brand);opacity:.32;font-weight:800}
.proof-card blockquote{font-size:17px;line-height:1.85;color:var(--text);margin-top:8px}
.proof-person{display:flex;align-items:center;gap:12px;margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}
.avatar{
  width:40px;height:40px;border-radius:999px;background:var(--brand-soft);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex-shrink:0;
}
.proof-person .pname{font-size:15px;font-weight:600;color:var(--ink);line-height:1.5}
.proof-person .prole{font-size:13px;color:var(--text-muted);line-height:1.6}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{overflow:hidden;display:flex;flex-direction:column;height:100%}
.news-card a{display:flex;flex-direction:column;height:100%}
.news-cover{position:relative}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:15px 15px 0 0}
.news-cover .badge{position:absolute;left:14px;bottom:14px;background:rgba(255,255,255,.94)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-title{
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-summary{
  font-size:15px;line-height:1.75;color:var(--text-muted);margin-top:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:18px;
}
.news-time{font-size:14px;color:var(--text-muted)}
.empty-state{
  height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius-card);
  color:var(--text-muted);text-align:center;padding:24px;
}
.empty-state .es-title{font-size:16px;font-weight:600;color:var(--text)}
.empty-state .es-desc{font-size:14px}

/* ============ 方案区 ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:34px 30px;display:flex;flex-direction:column;position:relative;
  transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-1)}
.price-card .pname{font-size:18px;font-weight:700;color:var(--ink)}
.price-card .pnote{font-size:14px;color:var(--text-muted);margin-top:6px;line-height:1.7}
.price-amount{display:flex;align-items:baseline;gap:6px;margin-top:22px}
.price-amount .num{font-size:36px;font-weight:800;color:var(--ink);line-height:1.1}
.price-amount .suf{font-size:14px;color:var(--text-muted)}
.price-list{margin-top:24px;display:flex;flex-direction:column;gap:12px}
.price-list li{display:flex;gap:10px;font-size:15px;line-height:2;color:var(--text)}
.check{color:var(--brand);flex-shrink:0;margin-top:6px}
.price-card .btn-primary,.price-card .btn-ghost{margin-top:auto}
.price-card .btn-wrap{margin-top:30px}
.price-card.featured{
  border:1.5px solid var(--brand);box-shadow:var(--shadow-2);transform:scale(1.02);z-index:2;
}
.price-card.featured:hover{transform:scale(1.02) translateY(-4px)}
.rec-badge{
  position:absolute;top:-14px;left:50%;transform:translateX(-50%);
  background:var(--brand);color:#fff;font-size:13px;font-weight:600;
  padding:5px 16px;border-radius:999px;white-space:nowrap;
}

/* ============ FAQ ============ */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.faq-item:hover{border-color:#D9D2F5}
.faq-item.open{border-color:var(--brand);box-shadow:var(--shadow-1)}
.faq-q{
  width:100%;min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:14px 22px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
}
.faq-icon{
  width:20px;height:20px;flex-shrink:0;position:relative;transition:transform .25s ease-out;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
}
.faq-icon::before{left:0;right:0;top:9px;height:2px}
.faq-icon::after{top:0;bottom:0;left:9px;width:2px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease-out}
.faq-a-inner{padding:0 22px 20px;font-size:16px;line-height:1.85;color:var(--text-muted)}

/* ============ 底部 CTA ============ */
.cta-block{
  background:var(--ink);border-radius:var(--radius-block);padding:64px 56px;
  display:flex;flex-direction:column;align-items:flex-start;gap:18px;
}
.cta-block h2{font-size:clamp(22px,3vw,34px);line-height:1.3;font-weight:700;color:#fff}
.cta-block p{font-size:16px;line-height:1.85;color:#C3BED0;max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:12px}
.cta-block .btn-ghost{border-color:rgba(255,255,255,.32);color:#fff}
.cta-block .btn-ghost:hover{border-color:var(--mint);color:var(--mint)}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#B6B1C4;margin-top:100px;padding:64px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .brand-name{color:#fff}
.footer-desc{font-size:15px;line-height:1.85;color:#9A94AC;margin-top:18px;max-width:340px}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col a{display:block;font-size:15px;color:#9A94AC;padding:6px 0}
.footer-col a:hover{color:var(--mint)}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:14px;color:#807A92;
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 24px;border-radius:999px;background:var(--accent);color:#fff;
  font-size:15px;font-weight:600;box-shadow:0 12px 28px -10px rgba(255,122,69,.5);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .25s ease-out,transform .25s ease-out,visibility .25s ease-out,background .2s ease-out;
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:#F0692F}
.mobile-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;display:none;
  align-items:center;gap:12px;height:64px;padding:0 16px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
}
.mobile-bar .btn-accent{flex:0 0 70%;height:44px}
.mobile-bar .bar-link{font-size:14px;font-weight:600;color:var(--text-muted);white-space:nowrap}
.mobile-bar .bar-link:hover{color:var(--brand)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 24px}
}
@media (max-width:1023px){
  .nav-links,.nav-right .search-box,.nav-right .nav-ghost-btn{display:none}
  .nav-toggle{display:inline-flex}
  .nav-right{margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .bento{grid-template-columns:1fr;grid-template-rows:none}
  .bento-main{grid-row:auto}
  .demo-grid{grid-template-columns:1fr;gap:36px}
  .price-grid{grid-template-columns:1fr;gap:20px}
  .price-card.featured{transform:none}
  .price-card.featured:hover{transform:translateY(-4px)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:84px 0}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.85}
  .container{padding:0 16px}
  .nav-wrap{height:60px}
  .anchorbar,.anchorbar-inner{top:60px}
  .section{padding:60px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:26px}
  .hero{padding:40px 0 48px}
  .hero-cta{gap:12px}
  .hero-cta .btn-primary,.hero-cta .btn-ghost{flex:1 1 100%}
  .trust{gap:24px}
  .proof-band{grid-template-columns:repeat(2,1fr);padding:32px 24px;gap:24px}
  .proof-cards{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .cta-block{padding:40px 24px}
  .cta-actions .btn-primary,.cta-actions .btn-ghost{flex:1 1 100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer{padding:48px 0 96px;margin-top:64px}
  .float-cta{display:none}
  .mobile-bar{display:flex}
  .faq-q{font-size:16px;padding:14px 18px}
  .faq-a-inner{padding:0 18px 18px}
}
@media (max-width:519px){
  .proof-band{grid-template-columns:1fr}
  .proof-cell .pnum{font-size:30px}
}

/* roulang page: category1 */
:root{
  --ink:#15121F;
  --ink-2:#241F33;
  --brand:#5A3FE0;
  --brand-dark:#4630C4;
  --brand-soft:#EFEBFF;
  --mint:#22C7A9;
  --accent:#FF7A45;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DC;
  --text:#2C2833;
  --text-muted:#6E6879;
  --radius-card:16px;
  --radius-block:24px;
  --radius-btn:12px;
  --shadow-1:0 8px 24px -12px rgba(21,18,31,.12);
  --shadow-2:0 16px 40px -16px rgba(90,63,224,.28);
  --ease:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;}
p{margin:0 0 1.2em;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,241,.88);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:22px;min-height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:32px;height:32px;border-radius:10px;color:#fff;
  background:linear-gradient(135deg,#5A3FE0,#8A6BFF);
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-name{font-size:18px;font-weight:700;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:6px;}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--text);
  padding:22px 0;transition:color var(--ease);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;
  background:var(--brand);transform:scaleX(0);transition:transform var(--ease);
}
.nav-links a:hover{color:var(--brand);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand);}
.nav-links a.active::after{transform:scaleX(1);}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search-box{
  display:flex;align-items:center;gap:8px;width:240px;height:40px;
  padding:0 12px;border:1px solid var(--line);border-radius:10px;
  background:var(--surface);color:var(--text-muted);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(90,63,224,.12);}
.search-box input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--text);}
.nav-ghost-btn{
  display:inline-flex;align-items:center;height:40px;padding:0 16px;
  border:1px solid var(--line);border-radius:12px;font-size:15px;font-weight:500;
  color:var(--text);background:transparent;transition:all var(--ease);white-space:nowrap;
}
.nav-ghost-btn:hover{border-color:var(--brand);color:var(--brand);}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);
  border-radius:12px;background:var(--surface);color:var(--text);
  place-items:center;cursor:pointer;
}

/* ---------- buttons ---------- */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border:1px solid transparent;
  border-radius:var(--radius-btn);background:var(--brand);color:#fff;
  font-size:15px;font-weight:600;cursor:pointer;transition:all var(--ease);
}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow-2);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border:1px solid var(--line);
  border-radius:var(--radius-btn);background:transparent;color:var(--text);
  font-size:15px;font-weight:600;cursor:pointer;transition:all var(--ease);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:0 26px;border:0;border-radius:999px;
  background:var(--accent);color:#fff;font-size:16px;font-weight:600;
  cursor:pointer;transition:all var(--ease);
  box-shadow:0 12px 28px -10px rgba(255,122,69,.5);
}
.btn-accent:hover{transform:translateY(-2px);}
.btn-ghost-invert{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 22px;border:1px solid rgba(255,255,255,.32);
  border-radius:var(--radius-btn);background:transparent;color:#fff;
  font-size:15px;font-weight:600;transition:all var(--ease);
}
.btn-ghost-invert:hover{border-color:#fff;background:rgba(255,255,255,.08);}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;background:var(--brand-soft);
  color:var(--brand);font-size:13px;font-weight:600;line-height:1.4;
}
.badge-mint{background:rgba(34,199,169,.14);color:#12806D;}
.badge-accent{background:rgba(255,122,69,.14);color:#C4501F;}

/* ---------- hero ---------- */
.cat-hero{padding:52px 0 8px;}
.cat-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center;}
.cat-hero h1{
  font-size:clamp(28px,4.4vw,44px);line-height:1.25;font-weight:800;margin:16px 0 18px;
}
.cat-hero .lead{font-size:17px;line-height:1.9;color:var(--text-muted);margin:0 0 26px;max-width:34em;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.media-frame{
  position:relative;border-radius:20px;overflow:hidden;
  border:1px solid var(--line);background:var(--brand-soft);
}
.media-frame img{width:100%;height:100%;aspect-ratio:16/11;object-fit:cover;}
.media-cold::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(200deg,rgba(90,63,224,.34),rgba(21,18,31,.16));
  pointer-events:none;
}
.media-tag{
  position:absolute;left:14px;bottom:14px;z-index:2;
  padding:6px 14px;border-radius:999px;background:rgba(255,255,255,.92);
  color:var(--brand);font-size:13px;font-weight:600;
}
.hero-fade{
  height:40px;margin-top:36px;
  background:linear-gradient(180deg,var(--bg),rgba(246,244,241,0));
}
.hero-facts{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;
  padding:26px 28px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-1);
}
.hero-facts .num{font-size:32px;font-weight:800;color:var(--brand);line-height:1.2;}
.hero-facts .cap{font-size:14px;color:var(--text-muted);line-height:1.7;}

/* ---------- sections ---------- */
.section{padding:88px 0 0;}
.section-head{margin-bottom:34px;}
.section-head h2{font-size:clamp(22px,3vw,32px);line-height:1.3;font-weight:700;}
.section-head p{margin:12px 0 0;color:var(--text-muted);font-size:16px;max-width:44em;}

/* ---------- doc layout ---------- */
.doc-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:44px;align-items:start;}
.toc{
  position:sticky;top:96px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:18px 16px 14px;
}
.toc h3{margin:0 0 10px;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--text-muted);}
.toc a{
  display:block;padding:9px 10px;border-radius:10px;font-size:15px;
  color:var(--text);transition:all var(--ease);
}
.toc a:hover{background:var(--brand-soft);color:var(--brand);}
.toc a.current{background:var(--brand-soft);color:var(--brand);font-weight:600;}

.group-list{display:flex;flex-direction:column;gap:56px;}
.group-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:36px;align-items:center;}
.group-row--flip .group-media{order:2;}
.group-media{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:var(--brand-soft);}
.group-media img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.group-body h3{font-size:20px;line-height:1.45;font-weight:600;margin:0 0 12px;}
.group-body p{font-size:16.5px;line-height:1.9;color:var(--text-muted);margin:0 0 1em;}
.group-body p:last-child{margin-bottom:0;}
.group-points{list-style:none;padding:0;margin:14px 0 0;display:flex;flex-direction:column;gap:8px;}
.group-points li{position:relative;padding-left:20px;font-size:15.5px;color:var(--text);}
.group-points li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;
  border-radius:50%;background:var(--brand);
}
.anchor-offset{scroll-margin-top:96px;}

/* ---------- cross links ---------- */
.cross-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.cross-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-1);transition:all var(--ease);display:block;
}
.cross-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);}
.cross-card h3{font-size:17px;font-weight:600;margin:12px 0 8px;}
.cross-card p{font-size:15px;line-height:1.75;color:var(--text-muted);margin:0;}
.cross-card .arrow{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--brand);}

/* ---------- faq ---------- */
.faq-wrap{max-width:820px;margin:0 auto;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;transition:border-color var(--ease);
}
.faq-item:hover{border-color:#D6CFC6;}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;min-height:64px;padding:14px 22px;background:none;border:0;
  text-align:left;font-size:17px;font-weight:600;color:var(--text);cursor:pointer;
}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;display:grid;place-items:center;
  color:var(--brand);font-size:20px;line-height:1;
  transition:transform var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 300ms ease-out;}
.faq-a-inner{padding:0 22px 20px;font-size:16px;line-height:1.85;color:var(--text-muted);}

/* ---------- cta ---------- */
.cta-block{
  background:var(--ink);border-radius:var(--radius-block);
  padding:56px 44px;color:#fff;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-block h2{color:#fff;font-size:clamp(22px,3vw,30px);line-height:1.35;}
.cta-block p{margin:12px 0 0;font-size:16px;color:rgba(255,255,255,.72);max-width:38em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);margin-top:96px;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-name{color:#fff;}
.footer-desc{font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.62);max-width:30em;margin:0;}
.footer-col h4{font-size:14px;font-weight:600;color:#fff;margin:0 0 14px;letter-spacing:.04em;}
.footer-col a{display:block;font-size:14.5px;color:rgba(255,255,255,.68);padding:6px 0;transition:color var(--ease);}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:14px;color:rgba(255,255,255,.55);
}

/* ---------- floating cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:70;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease);
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-wrap{min-height:60px;gap:14px;}
  .search-box{display:none;}
  .nav-ghost-btn{display:none;}
  .nav-toggle{display:grid;}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;display:none;
    flex-direction:column;align-items:stretch;gap:0;margin:0;
    background:var(--surface);border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-1);padding:6px 24px 14px;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:14px 0;font-size:16px;border-bottom:1px solid var(--line);}
  .nav-links a:last-child{border-bottom:0;}
  .nav-links a::after{display:none;}
  .cat-hero-grid{grid-template-columns:1fr;gap:32px;}
  .doc-layout{grid-template-columns:1fr;gap:28px;}
  .toc{position:static;}
  .toc a{display:inline-block;margin:0 6px 6px 0;}
  .cross-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767px){
  body{font-size:16px;line-height:1.85;}
  .container{padding:0 16px;}
  .cat-hero{padding:32px 0 0;}
  .section{padding:56px 0 0;}
  .hero-facts{grid-template-columns:1fr;gap:16px;padding:22px;}
  .group-row{grid-template-columns:1fr;gap:20px;}
  .group-row--flip .group-media{order:0;}
  .cross-grid{grid-template-columns:1fr;}
  .cta-block{padding:36px 24px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn-accent,.cta-actions .btn-ghost-invert{width:100%;}
  .faq-q{font-size:16px;padding:14px 16px;}
  .faq-a-inner{padding:0 16px 18px;font-size:15px;}
  .site-footer{margin-top:64px;padding:48px 0 24px;}
  .footer-grid{grid-template-columns:1fr;}
  .float-cta{right:16px;bottom:18px;}
}
@media (max-width:519px){
  .brand-name{font-size:16px;}
  .hero-facts .num{font-size:28px;}
  .nav-right .btn-primary{padding:0 14px;font-size:14px;}
}

/* roulang page: article */
:root{
  --ink:#15121F;
  --ink-2:#241F33;
  --brand:#5A3FE0;
  --brand-dark:#4630C4;
  --brand-soft:#EFEBFF;
  --mint:#22C7A9;
  --accent:#FF7A45;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DC;
  --text:#2C2833;
  --text-muted:#6E6879;
  --r-card:16px;
  --r-block:24px;
  --r-btn:12px;
  --sh-1:0 8px 24px -12px rgba(21,18,31,.12);
  --sh-2:0 16px 40px -16px rgba(90,63,224,.28);
  --t:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
.page-body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn-primary,.btn-ghost,.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;text-decoration:none;
  border:1px solid transparent;cursor:pointer;transition:all var(--t);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);box-shadow:0 14px 30px -14px rgba(90,63,224,.62);text-decoration:none}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);text-decoration:none}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#F0642C;color:#fff;transform:translateY(-1px);box-shadow:0 14px 28px -12px rgba(255,122,69,.55);text-decoration:none}
.btn-ghost.on-dark{border-color:rgba(255,255,255,.3);color:#fff}
.btn-ghost.on-dark:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.btn-primary[disabled],.btn-ghost[disabled]{opacity:.45;box-shadow:none;transform:none;cursor:not-allowed}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);
  font-size:13px;font-weight:600;line-height:1.6;white-space:nowrap;
}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1)}
.card-hover{transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.card-hover:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#DCD5FF}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,241,.88);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:22px;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);flex:0 0 auto}
.brand-mark{
  width:32px;height:32px;flex:0 0 auto;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),#7C5CFF);
  color:#fff;display:grid;place-items:center;
}
.brand-name{font-size:18px;font-weight:700;white-space:nowrap;letter-spacing:.2px}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:6px}
.nav-links a{
  position:relative;font-size:15px;font-weight:500;color:var(--text);
  text-decoration:none;padding:6px 0;transition:color var(--t);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-links a:hover{color:var(--brand);text-decoration:none}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--brand)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;width:240px;height:40px;padding:0 12px;
  border:1px solid var(--line);border-radius:10px;background:var(--surface);
  color:var(--text-muted);transition:border-color var(--t),box-shadow var(--t);
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(90,63,224,.12)}
.search-box input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:14px;color:var(--text)}
.nav-ghost-btn{
  display:inline-flex;align-items:center;height:40px;padding:0 16px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--text);text-decoration:none;
  border:1px solid transparent;transition:all var(--t);white-space:nowrap;
}
.nav-ghost-btn:hover{background:var(--brand-soft);color:var(--brand);text-decoration:none}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:10px;background:var(--surface);
  color:var(--text);cursor:pointer;transition:all var(--t);
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.nav-drawer{
  position:fixed;top:0;right:0;z-index:90;width:300px;height:100%;
  background:var(--surface);border-left:1px solid var(--line);
  padding:20px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;
  transform:translateX(100%);transition:transform var(--t);
}
.nav-drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:var(--surface);
  color:var(--text);font-size:20px;line-height:1;cursor:pointer;transition:all var(--t);
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand)}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{
  padding:12px 12px;border-radius:10px;font-size:15px;font-weight:500;
  text-decoration:none;color:var(--text);transition:all var(--t);
}
.drawer-nav a:hover{background:var(--brand-soft);color:var(--brand);text-decoration:none}
.drawer-search{display:flex;align-items:center;gap:8px;height:44px;padding:0 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg);color:var(--text-muted)}
.drawer-search input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:14px;color:var(--text)}
.drawer-actions{display:flex;flex-direction:column;gap:10px;margin-top:auto}
.drawer-mask{
  position:fixed;inset:0;z-index:80;background:rgba(21,18,31,.45);
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);
}
.drawer-mask.open{opacity:1;visibility:visible}

/* ---------- 文章头部 ---------- */
.article-hero{position:relative;overflow:hidden;padding:52px 0 48px}
.article-hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(120deg,rgba(21,18,31,.9),rgba(36,31,51,.86)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:14px;color:rgba(255,255,255,.72);margin-bottom:18px;
}
.breadcrumb a{color:rgba(255,255,255,.72);text-decoration:none;transition:color var(--t)}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.breadcrumb .sep{color:rgba(255,255,255,.4)}
.breadcrumb .current{color:#fff;font-weight:500;max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{
  margin:0;color:#fff;font-size:clamp(26px,3.6vw,38px);line-height:1.35;font-weight:700;
  max-width:900px;overflow-wrap:break-word;
}
.article-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:12px;
  margin-top:22px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);
  font-size:14px;color:rgba(255,255,255,.74);
}
.meta-dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.4);flex:0 0 auto}

/* ---------- 文章布局 ---------- */
.article-main{padding:56px 0 72px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:40px;align-items:start}
.article-body{min-width:0}

.prose-cn{font-size:17px;line-height:1.9;color:var(--text);overflow-wrap:break-word}
.prose-cn p{margin:0 0 1.2em}
.prose-cn h2{
  position:relative;margin:40px 0 16px;padding-left:14px;
  font-size:clamp(22px,3vw,28px);line-height:1.35;font-weight:700;color:var(--ink);
}
.prose-cn h2::before{
  content:"";position:absolute;left:0;top:.3em;bottom:.3em;width:4px;border-radius:2px;background:var(--brand);
}
.prose-cn h3{margin:28px 0 12px;font-size:20px;line-height:1.45;font-weight:600;color:var(--ink)}
.prose-cn h4{margin:22px 0 10px;font-size:17px;font-weight:600;color:var(--ink)}
.prose-cn ul,.prose-cn ol{margin:0 0 1.2em;padding-left:1.5em}
.prose-cn li{margin-bottom:.5em}
.prose-cn ul li::marker{color:var(--brand)}
.prose-cn ol li::marker{color:var(--brand);font-weight:700}
.prose-cn a{color:var(--brand);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px;transition:color var(--t)}
.prose-cn a:hover{color:var(--brand-dark)}
.prose-cn strong{font-weight:700;color:var(--ink)}
.prose-cn img{width:100%;height:auto;border-radius:var(--r-card);margin:26px 0 8px}
.prose-cn figure{margin:26px 0}
.prose-cn figcaption{margin-top:8px;text-align:center;font-size:14px;line-height:1.7;color:var(--text-muted)}
.prose-cn blockquote{
  margin:26px 0;padding:20px 28px;border-left:3px solid var(--brand);
  background:var(--brand-soft);border-radius:12px;color:var(--ink-2);
}
.prose-cn blockquote p:last-child{margin-bottom:0}
.prose-cn table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;line-height:1.7}
.prose-cn th,.prose-cn td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.prose-cn th{background:var(--brand-soft);font-weight:600;color:var(--ink)}
.prose-cn hr{border:0;border-top:1px solid var(--line);margin:36px 0}

/* 空态 */
.empty-state{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;
  min-height:260px;padding:40px 24px;text-align:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-block);
}
.empty-state .empty-icon{
  width:56px;height:56px;border-radius:18px;background:var(--brand-soft);color:var(--brand);
  display:grid;place-items:center;
}
.empty-state h2{margin:6px 0 0;font-size:20px;font-weight:600;color:var(--ink)}
.empty-state p{margin:0;font-size:15px;line-height:1.75;color:var(--text-muted);max-width:460px}

/* ---------- 侧栏 ---------- */
.article-side{display:flex;flex-direction:column;gap:20px}
.side-sticky{position:sticky;top:92px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh-1)}
.side-card h3{margin:0 0 14px;font-size:15px;font-weight:700;color:var(--ink);letter-spacing:.2px}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.toc-list li{margin:0}
.toc-list a{
  display:block;font-size:14px;line-height:1.6;color:var(--text-muted);
  text-decoration:none;padding-left:12px;border-left:2px solid var(--line);transition:all var(--t);
}
.toc-list a:hover{color:var(--brand);border-left-color:var(--brand);text-decoration:none}
.toc-empty{font-size:14px;line-height:1.7;color:var(--text-muted);margin:0}
.side-links{display:flex;flex-direction:column;gap:4px}
.side-links a{
  display:block;padding:10px 12px;border-radius:10px;font-size:14px;font-weight:500;
  color:var(--text);text-decoration:none;transition:all var(--t);
}
.side-links a:hover{background:var(--brand-soft);color:var(--brand);text-decoration:none}
.side-note{font-size:14px;line-height:1.75;color:var(--text-muted);margin:0}
.side-cover{border-radius:12px;overflow:hidden;border:1px solid var(--line)}
.side-cover img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px}

/* ---------- 上下篇 ---------- */
.prev-next{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:44px}
.pn-card{
  display:flex;flex-direction:column;gap:8px;padding:20px 22px;text-decoration:none;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.pn-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#DCD5FF;text-decoration:none}
.pn-label{font-size:13px;font-weight:600;color:var(--brand);letter-spacing:.4px}
.pn-title{font-size:16px;font-weight:600;line-height:1.6;color:var(--ink)}
.pn-card.next{align-items:flex-end;text-align:right}

/* ---------- 相关推荐 ---------- */
.related{margin-top:64px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px}
.section-head h2{margin:0;font-size:clamp(22px,3vw,30px);line-height:1.3;font-weight:700;color:var(--ink)}
.section-head .more{font-size:15px;font-weight:600;color:var(--brand);text-decoration:none;white-space:nowrap}
.section-head .more:hover{text-decoration:underline;text-underline-offset:3px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.related-card{
  display:flex;flex-direction:column;gap:12px;padding:22px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  text-decoration:none;transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#DCD5FF;text-decoration:none}
.related-card h3{margin:0;font-size:17px;font-weight:600;line-height:1.6;color:var(--ink)}
.related-meta{font-size:14px;color:var(--text-muted);margin-top:auto}
.back-wrap{display:flex;justify-content:center;margin-top:44px}

/* ---------- 底部 CTA ---------- */
.cta-section{padding:0 0 88px}
.cta-inner{
  position:relative;overflow:hidden;
  background:var(--ink);border-radius:var(--r-block);
  padding:56px 48px;display:flex;flex-direction:column;align-items:flex-start;gap:16px;
}
.cta-inner::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(90,63,224,.55),rgba(90,63,224,0) 68%);
}
.cta-inner h2{margin:0;color:#fff;font-size:clamp(22px,3vw,32px);line-height:1.3;font-weight:700;position:relative;z-index:1}
.cta-inner p{margin:0;max-width:640px;color:rgba(255,255,255,.76);font-size:16px;line-height:1.8;position:relative;z-index:1}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:8px;position:relative;z-index:1}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:14px}
.footer-brand .brand-mark{width:32px;height:32px;border-radius:10px;background:linear-gradient(135deg,var(--brand),#7C5CFF);display:grid;place-items:center;color:#fff}
.footer-brand .brand-name{font-size:18px;font-weight:700}
.footer-desc{margin:0;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:420px}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-col h4{margin:0 0 6px;font-size:15px;font-weight:700;color:#fff}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66);text-decoration:none;transition:color var(--t);width:fit-content}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  font-size:14px;color:rgba(255,255,255,.56);
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:28px;z-index:70;
  width:48px;height:48px;border-radius:999px;border:1px solid var(--line);
  background:var(--surface);color:var(--brand);display:grid;place-items:center;cursor:pointer;
  box-shadow:var(--sh-1);opacity:0;visibility:hidden;transition:all var(--t);
}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{background:var(--brand);color:#fff;border-color:var(--brand);transform:translateY(-2px)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links,.search-box,.nav-ghost-btn{display:none}
  .nav-toggle{display:inline-flex}
  .article-layout{grid-template-columns:1fr;gap:32px}
  .side-sticky{position:static}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .nav-wrap{height:60px;gap:12px}
  .brand-name{font-size:16px}
  .article-hero{padding:32px 0 32px}
  .breadcrumb .current{max-width:200px}
  .article-main{padding:36px 0 56px}
  .prose-cn{font-size:16px;line-height:1.85}
  .prose-cn h2{margin-top:32px}
  .prose-cn blockquote{padding:16px 20px}
  .prev-next{grid-template-columns:1fr}
  .pn-card.next{align-items:flex-start;text-align:left}
  .related-grid{grid-template-columns:1fr}
  .cta-section{padding-bottom:64px}
  .cta-inner{padding:34px 24px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .to-top{right:16px;bottom:18px;width:44px;height:44px}
}
@media (max-width:520px){
  .article-title{font-size:24px}
  .cta-actions .btn-primary,.cta-actions .btn-accent,.cta-actions .btn-ghost{width:100%}
}

/* roulang page: category3 */
:root{
  --ink:#15121F;
  --ink-2:#241F33;
  --brand:#5A3FE0;
  --brand-dark:#4630C4;
  --brand-soft:#EFEBFF;
  --mint:#22C7A9;
  --accent:#FF7A45;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DC;
  --text:#2C2833;
  --text-muted:#6E6879;
  --radius-card:16px;
  --radius-lg:24px;
  --radius-btn:12px;
  --shadow-1:0 8px 24px -12px rgba(21,18,31,.12);
  --shadow-2:0 16px 40px -16px rgba(90,63,224,.28);
  --font: system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body.page{
  margin:0;
  padding:0;
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
}
body.page img{max-width:100%;height:auto;display:block;}
body.page a{color:inherit;text-decoration:none;}
body.page button,body.page input{font-family:inherit;font-size:inherit;}
body.page h1,body.page h2,body.page h3,body.page h4{margin:0;font-weight:700;color:var(--text);}
body.page p{margin:0;}
body.page ul{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- 语义组件 ---------- */
.btn-primary,.btn-ghost,.btn-accent{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:16px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:all .2s ease-out;white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 28px -12px rgba(90,63,224,.55);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 12px 28px -14px rgba(255,122,69,.6);}
.btn-accent:hover{background:#F06A33;transform:translateY(-1px);}
.btn-primary:focus-visible,.btn-ghost:focus-visible,.btn-accent:focus-visible,
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;background:var(--brand-soft);
  color:var(--brand);font-size:13px;font-weight:600;line-height:1.6;
}
.badge-mint{background:rgba(34,199,169,.14);color:#12836F;}
.badge-ink{background:rgba(255,255,255,.12);color:#CFC8F5;}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);}
.card-hover{transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;}
.card-hover:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DCD4F6;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,241,.88);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:28px;min-height:68px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:32px;height:32px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(140deg,var(--brand) 0%,#7A5CF0 60%,var(--mint) 140%);
  color:#fff;flex:0 0 auto;
}
.brand-name{font-size:18px;font-weight:700;letter-spacing:0;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:6px;flex:1 1 auto;}
.nav-links a{
  position:relative;display:inline-flex;align-items:center;height:68px;padding:0 12px;
  font-size:15px;font-weight:500;color:var(--text);transition:color .2s ease-out;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:14px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .2s ease-out;
}
.nav-links a:hover{color:var(--brand);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand);font-weight:600;}
.nav-links a.active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.search-box{
  display:flex;align-items:center;gap:8px;width:240px;height:40px;padding:0 14px;
  background:var(--surface);border:1px solid var(--line);border-radius:10px;color:var(--text-muted);
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(90,63,224,.12);}
.search-box input{flex:1 1 auto;min-width:0;height:100%;border:0;outline:none;background:transparent;font-size:15px;color:var(--text);}
.search-box input::placeholder{color:#9A94A6;}
.nav-ghost-btn{
  display:inline-flex;align-items:center;height:40px;padding:0 14px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--text);border:1px solid var(--line);background:transparent;
  transition:color .2s ease-out,border-color .2s ease-out;
}
.nav-ghost-btn:hover{color:var(--brand);border-color:var(--brand);}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--surface);border-radius:10px;color:var(--text);cursor:pointer;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}
.mobile-drawer{
  position:fixed;top:0;right:0;z-index:80;width:300px;max-width:86vw;height:100%;
  background:var(--surface);border-left:1px solid var(--line);box-shadow:-18px 0 40px -24px rgba(21,18,31,.35);
  transform:translateX(102%);transition:transform .24s ease-out;
  padding:20px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.mobile-drawer.open{transform:translateX(0);}
.mobile-drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:transparent;
  color:var(--text);cursor:pointer;
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand);}
.drawer-links{display:flex;flex-direction:column;}
.drawer-links a{
  display:flex;align-items:center;min-height:48px;padding:0 12px;border-radius:10px;
  font-size:16px;font-weight:500;border-bottom:1px solid var(--line);
}
.drawer-links a.active{color:var(--brand);background:var(--brand-soft);}
.drawer-search{display:flex;align-items:center;gap:8px;height:44px;padding:0 14px;border:1px solid var(--line);border-radius:10px;color:var(--text-muted);}
.drawer-search input{flex:1 1 auto;min-width:0;border:0;outline:none;background:transparent;font-size:15px;}
.drawer-actions{display:flex;flex-direction:column;gap:10px;margin-top:auto;}

/* ---------- 面包屑 & 页头 ---------- */
.crumb-bar{background:var(--surface);border-bottom:1px solid var(--line);}
.crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:14px 0;font-size:14px;color:var(--text-muted);}
.crumb a{color:var(--text-muted);}
.crumb a:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;}
.crumb .sep{color:#BDB7C9;}
.crumb .current{color:var(--text);font-weight:600;}

.page-hero{padding:64px 0 56px;background:linear-gradient(180deg,rgba(239,235,255,.7) 0%,rgba(246,244,241,0) 72%);}
.hero-inner{display:flex;flex-direction:column;align-items:flex-start;gap:20px;max-width:820px;}
.hero-title{
  font-size:clamp(28px,4.4vw,46px);line-height:1.25;font-weight:800;letter-spacing:0;
}
.hero-title .hl{color:var(--brand);}
.hero-sub{font-size:17px;line-height:1.9;color:var(--text-muted);max-width:720px;}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:4px;}
.hero-note{display:flex;flex-wrap:wrap;gap:10px;font-size:14px;color:var(--text-muted);}

.stat-strip{
  margin-top:36px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
}
.stat-cell{background:var(--surface);padding:22px 20px;}
.stat-num{font-size:34px;line-height:1.2;font-weight:800;color:var(--brand);}
.stat-num span{font-size:15px;font-weight:600;color:var(--text-muted);margin-left:4px;}
.stat-label{margin-top:6px;font-size:14px;line-height:1.7;color:var(--text-muted);}

/* ---------- 区块通用 ---------- */
.section{padding:88px 0;}
.section.tight{padding:64px 0;}
.section.alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px;}
.section-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.08em;}
.section-title{font-size:clamp(22px,3vw,34px);line-height:1.3;font-weight:700;margin-top:10px;}
.section-desc{margin-top:12px;font-size:16px;line-height:1.9;color:var(--text-muted);max-width:720px;}

/* ---------- 对比卡 2×2 ---------- */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.compare-card{
  display:flex;flex-direction:column;gap:16px;padding:28px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);
}
.compare-icon{
  width:48px;height:48px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);
}
.compare-card h3{font-size:20px;line-height:1.45;font-weight:600;}
.compare-card p.lead{font-size:15px;line-height:1.8;color:var(--text-muted);}
.compare-list{display:flex;flex-direction:column;gap:10px;margin-top:2px;}
.compare-list li{position:relative;padding-left:26px;font-size:15px;line-height:1.8;color:var(--text);}
.compare-list li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:5px;
  background:linear-gradient(140deg,var(--brand),#8C74F5);
  opacity:.9;
}
.card-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand);
  padding-top:6px;
}
.card-link:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;}
.card-link svg{transition:transform .2s ease-out;}
.card-link:hover svg{transform:translateX(4px);}

/* ---------- 参数说明条 ---------- */
.spec-strip{
  display:flex;gap:14px;overflow-x:auto;padding:4px 4px 14px;
  scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;
}
.spec-strip::-webkit-scrollbar{height:6px;}
.spec-strip::-webkit-scrollbar-thumb{background:#D9D3E4;border-radius:999px;}
.spec-card{
  flex:0 0 216px;scroll-snap-align:start;background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:18px 18px 16px;transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.spec-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-1);}
.spec-label{font-size:13px;font-weight:600;color:var(--text-muted);letter-spacing:.02em;}
.spec-value{margin-top:8px;font-size:22px;line-height:1.35;font-weight:800;color:var(--ink);}
.spec-foot{margin-top:6px;font-size:13px;line-height:1.7;color:var(--text-muted);}

/* ---------- 图文区块 ---------- */
.split{display:grid;grid-template-columns:5fr 7fr;gap:36px;align-items:center;}
.split-media{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--line);background:var(--brand-soft);}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.split-media .tag{
  position:absolute;left:16px;bottom:16px;background:rgba(21,18,31,.72);color:#fff;
  font-size:13px;font-weight:600;padding:6px 12px;border-radius:999px;backdrop-filter:blur(4px);
}
.path-list{display:flex;flex-direction:column;gap:18px;}
.path-item{display:flex;gap:16px;align-items:flex-start;}
.path-index{
  width:32px;height:32px;flex:0 0 auto;border-radius:999px;background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
}
.path-body h3{font-size:18px;font-weight:600;line-height:1.5;}
.path-body p{margin-top:6px;font-size:15px;line-height:1.85;color:var(--text-muted);}

/* ---------- FAQ ---------- */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:14px;overflow:hidden;}
.faq-item[open]{border-color:#D8D0F4;box-shadow:var(--shadow-1);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:64px;padding:12px 22px;cursor:pointer;font-size:17px;font-weight:600;line-height:1.6;
  list-style:none;
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q:hover{color:var(--brand);}
.faq-icon{flex:0 0 auto;width:20px;height:20px;color:var(--brand);transition:transform .2s ease-out;}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-a{padding:0 22px 20px;font-size:16px;line-height:1.85;color:var(--text-muted);}

/* ---------- CTA ---------- */
.cta-panel{
  background:var(--brand-soft);border:1px solid #DCD4F6;border-radius:var(--radius-lg);
  padding:52px 48px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-panel h2{font-size:clamp(22px,3vw,32px);line-height:1.35;font-weight:700;}
.cta-panel p{margin-top:12px;font-size:16px;line-height:1.85;color:var(--text-muted);max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#C9C4D8;margin-top:0;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;}
.footer-brand .brand-name{color:#fff;}
.footer-desc{margin-top:16px;font-size:15px;line-height:1.85;color:#9E98AF;max-width:340px;}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px;}
.footer-col a{display:block;font-size:15px;line-height:2.2;color:#B6B0C8;transition:color .2s ease-out;}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:14px;color:#8E88A0;
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-links{display:none;}
  .search-box{width:200px;}
  .nav-toggle{display:inline-flex;}
  .split{grid-template-columns:1fr;gap:26px;}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  body.page{font-size:16px;line-height:1.85;}
  .nav-wrap{gap:14px;min-height:60px;}
  .nav-right .nav-ghost-btn,.nav-right .btn-primary,.nav-right .search-box{display:none;}
  .section{padding:60px 0;}
  .section.tight{padding:48px 0;}
  .page-hero{padding:44px 0 40px;}
  .compare-grid{grid-template-columns:1fr;}
  .compare-card{padding:22px;}
  .stat-cell{padding:18px 16px;}
  .stat-num{font-size:28px;}
  .cta-panel{padding:32px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn-primary,.cta-actions .btn-ghost{flex:1 1 auto;justify-content:center;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .spec-card{flex:0 0 186px;}
}
@media (max-width:520px){
  .hero-actions{width:100%;}
  .hero-actions .btn-primary,.hero-actions .btn-ghost{flex:1 1 100%;justify-content:center;}
  .stat-strip{grid-template-columns:1fr;}
  .faq-q{font-size:16px;padding:12px 16px;}
  .faq-a{padding:0 16px 18px;}
}

/* roulang page: category2 */
:root{
  --ink:#15121F;
  --ink-2:#241F33;
  --brand:#5A3FE0;
  --brand-dark:#4630C4;
  --brand-soft:#EFEBFF;
  --mint:#22C7A9;
  --accent:#FF7A45;
  --bg:#F6F4F1;
  --surface:#FFFFFF;
  --line:#E7E2DC;
  --text:#2C2833;
  --text-muted:#6E6879;
  --radius-card:16px;
  --radius-block:24px;
  --radius-btn:12px;
  --shadow-1:0 8px 24px -12px rgba(21,18,31,.12);
  --shadow-2:0 16px 40px -16px rgba(90,63,224,.28);
  --t:200ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body.site-body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:17px;
  line-height:1.9;
}
img{display:block;max-width:100%}
a[href]{color:inherit;text-decoration:none;transition:color var(--t)}
button{font-family:inherit}
a[href]:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,241,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:22px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:18px;flex:none}
.brand-mark{
  width:32px;height:32px;border-radius:10px;flex:none;
  background:linear-gradient(135deg,var(--brand),#8A6BFF);
  color:#fff;display:flex;align-items:center;justify-content:center;
}
.brand-name{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:6px}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--text);padding:4px 0}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:-2px;height:2px;background:var(--brand);transition:right var(--t)}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after{right:0}
.nav-links a.active{color:var(--brand)}
.nav-links a.active::after{right:0}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;height:40px;width:230px;padding:0 12px;
  border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--text-muted);
  transition:border-color var(--t),box-shadow var(--t);
}
.search-box input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--text);font-family:inherit}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(90,63,224,.12)}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--surface);color:var(--text);cursor:pointer;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* ============ 按钮 ============ */
.btn-primary,.btn-ghost,.btn-accent,.nav-ghost-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;cursor:pointer;
  border:1px solid transparent;transition:all var(--t);
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 12px 26px -12px rgba(90,63,224,.6)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#ef6432;transform:translateY(-1px)}
.nav-ghost-btn{min-height:40px;padding:0 16px;font-size:15px;font-weight:500;color:var(--text);background:transparent}
.nav-ghost-btn:hover{color:var(--brand);background:var(--brand-soft)}
.btn-primary:active,.btn-ghost:active,.btn-accent:active{transform:translateY(0)}

/* ============ 移动抽屉 ============ */
.mask{
  position:fixed;inset:0;background:rgba(21,18,31,.45);
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);z-index:70;
}
.mask.open{opacity:1;visibility:visible}
.mobile-panel{
  position:fixed;top:0;right:0;width:300px;max-width:86vw;height:100%;
  background:var(--surface);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform 240ms ease-out;
  z-index:80;padding:26px 20px;overflow-y:auto;
}
.mobile-panel.open{transform:translateX(0)}
.mobile-panel h3{font-size:14px;color:var(--text-muted);font-weight:600;margin:0 0 12px}
.mobile-panel nav a{
  display:flex;align-items:center;min-height:48px;font-size:16px;
  color:var(--text);border-bottom:1px solid var(--line);
}
.mobile-panel nav a:hover{color:var(--brand)}
.mobile-panel nav a.active{color:var(--brand);font-weight:600}
.mobile-panel .panel-actions{margin-top:24px;display:grid;gap:12px}
.mobile-panel .search-box{width:100%;margin-top:20px}

/* ============ 页头 ============ */
.page-head{padding:72px 0 56px;position:relative;overflow:hidden}
.page-head::after{
  content:"";position:absolute;left:50%;top:-140px;transform:translateX(-50%);
  width:640px;height:320px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(90,63,224,.14),rgba(90,63,224,0));
  pointer-events:none;
}
.page-head .inner{position:relative;max-width:720px;margin:0 auto;text-align:center}
.crumb{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;font-size:14px;color:var(--text-muted);margin-bottom:20px}
.crumb a:hover{color:var(--brand)}
.crumb .sep{opacity:.55}
.crumb .now{color:var(--text);font-weight:600}
.page-head h1{
  font-size:clamp(28px,4.4vw,44px);line-height:1.25;font-weight:800;
  color:var(--ink);margin:0 0 18px;
}
.page-head .lead{font-size:17px;line-height:1.9;color:var(--text-muted);margin:0 auto;max-width:600px}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:26px}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;line-height:1.6;
}
.badge.is-mint{background:rgba(34,199,169,.14);color:#12836f}

/* ============ 时间线 ============ */
.timeline-sec{padding:28px 0 8px}
.timeline{position:relative;max-width:880px;margin:0 auto;padding-left:42px}
.timeline::before{
  content:"";position:absolute;left:9px;top:10px;bottom:10px;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand),rgba(90,63,224,.12));
}
.tl-item{position:relative;padding-bottom:40px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-40px;top:10px;width:14px;height:14px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px rgba(90,63,224,.12);
}
.tl-tag{
  display:inline-block;font-size:13px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:4px 12px;margin-bottom:12px;
}
.tl-item h2{font-size:20px;line-height:1.45;font-weight:700;color:var(--ink);margin:0 0 10px}
.tl-item p{margin:0 0 10px;font-size:16.5px;line-height:1.9;color:var(--text)}
.tl-item p:last-child{margin-bottom:0}
.tl-note{
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:14px 18px;font-size:15px;color:var(--text-muted);line-height:1.8;
}

/* ============ 图文与参数条 ============ */
.showcase{padding:76px 0}
.showcase-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center}
.showcase-figure{
  border-radius:20px;overflow:hidden;background:var(--brand-soft);
  border:6px solid #fff;box-shadow:var(--shadow-1);
}
.showcase-figure img{width:100%;aspect-ratio:16/10;object-fit:cover}
.sec-title{font-size:clamp(22px,3vw,32px);line-height:1.3;font-weight:700;color:var(--ink);margin:0 0 14px}
.sec-sub{font-size:16px;line-height:1.9;color:var(--text-muted);margin:0 0 26px;max-width:620px}
.link-inline{color:var(--brand);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:3px}
.link-inline:hover{color:var(--brand-dark)}
.param-strip{display:flex;gap:14px;overflow-x:auto;padding:4px 2px 14px;scroll-snap-type:x proximity}
.param-strip::-webkit-scrollbar{height:6px}
.param-strip::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px}
.param-card{
  flex:0 0 auto;min-width:216px;background:var(--surface);
  border:1px solid var(--line);border-radius:14px;padding:18px 20px;
  scroll-snap-align:start;transition:box-shadow var(--t),transform var(--t);
}
.param-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-1)}
.param-card .k{font-size:13px;color:var(--text-muted);margin-bottom:6px}
.param-card .v{font-size:17px;font-weight:700;color:var(--ink);line-height:1.6}

/* ============ 数据带 ============ */
.data-sec{padding:16px 0 84px}
.stats-band{
  background:var(--ink);border-radius:var(--radius-block);padding:40px 32px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.stat .num{font-size:34px;font-weight:800;color:#fff;line-height:1.2}
.stat .lbl{font-size:13px;font-weight:600;color:var(--mint);margin-top:8px;line-height:1.7}
.stat .desc{font-size:14px;color:#B6AFC9;margin-top:4px;line-height:1.7}

/* ============ FAQ ============ */
.faq-sec{padding:0 0 88px}
.faq-head{text-align:center;max-width:640px;margin:0 auto 36px}
.faq-head .sec-sub{margin:0 auto}
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;transition:box-shadow var(--t);
}
.faq-item:hover{box-shadow:var(--shadow-1)}
.faq-q{
  width:100%;min-height:64px;padding:12px 22px;background:transparent;border:0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  text-align:left;font-size:17px;font-weight:600;color:var(--ink);cursor:pointer;
}
.faq-icon{position:relative;width:20px;height:20px;flex:none;transition:transform var(--t)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px}
.faq-icon::before{left:9px;top:0;width:2px;height:20px}
.faq-icon::after{top:9px;left:0;height:2px;width:20px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--t);padding:0 22px}
.faq-a p{margin:0;font-size:16px;line-height:1.85;color:var(--text-muted)}

/* ============ CTA ============ */
.cta-sec{padding:0 0 96px}
.cta-box{
  background:var(--brand-soft);border:1px solid rgba(90,63,224,.16);
  border-radius:var(--radius-block);padding:56px 48px;text-align:center;
}
.cta-box h2{font-size:clamp(22px,3vw,30px);line-height:1.3;font-weight:700;color:var(--ink);margin:0 0 14px}
.cta-box p{font-size:16px;color:var(--text-muted);margin:0 auto 28px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#CFC9DA;padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:18px;margin-bottom:14px}
.footer-brand .brand-mark{background:linear-gradient(135deg,var(--brand),#8A6BFF)}
.footer-desc{font-size:14px;line-height:1.85;color:#A9A2BB;margin:0;max-width:330px}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin:0 0 16px}
.footer-col a{display:block;font-size:14px;line-height:2.2;color:#A9A2BB}
.footer-col a:hover{color:#fff}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:13px;color:#8C86A0;
}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-links{gap:18px}
  .nav-links a{font-size:14px}
  .search-box{display:none}
  .showcase-grid{grid-template-columns:1fr;gap:32px}
  .stats-band{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .nav-links{display:none}
  .nav-ghost-btn{display:none}
  .nav-toggle{display:inline-flex}
  .nav-right{gap:8px}
  .page-head{padding:48px 0 36px}
  .page-head h1{font-size:clamp(26px,7vw,32px)}
  .showcase{padding:56px 0}
  .data-sec{padding:8px 0 56px}
  .faq-sec{padding:0 0 56px}
  .cta-sec{padding:0 0 64px}
  .cta-box{padding:36px 22px}
  .timeline{padding-left:30px}
  .timeline::before{left:5px}
  .tl-item::before{left:-30px}
  .stats-band{padding:28px 20px;gap:20px}
  .stat .num{font-size:28px}
  .faq-q{font-size:16px;padding:12px 18px}
  .faq-a{padding:0 18px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}
@media (max-width:400px){
  .stats-band{grid-template-columns:1fr}
}