/* roulang page: index */
:root{
  --ink:#14161A;
  --ink-2:#3A3F47;
  --ink-3:#6B7280;
  --ink-4:#9AA1AC;
  --line:#E6E2DA;
  --line-2:#F0EDE6;
  --bg:#FBFAF7;
  --bg-2:#F4F1EA;
  --surface:#FFFFFF;
  --accent:#E2603F;
  --accent-h:#C94F31;
  --accent-a:#B3442A;
  --accent-soft:#FDEDE7;
  --r-s:8px;
  --r-m:14px;
  --r-l:20px;
  --sh-1:0 2px 12px rgba(20,22,26,.05);
  --sh-2:0 8px 24px rgba(20,22,26,.10);
  --max:1200px;
  --ff:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--ff);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .18s ease,transform .18s ease}
button,input,textarea,select{font-family:inherit;font-size:inherit}
button{cursor:pointer}
h1,h2,h3,h4,h5,p,ul,ol,blockquote,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:var(--accent-soft);color:var(--accent-a)}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 32px}
section[id]{scroll-margin-top:92px}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;height:72px;z-index:1000;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:height .25s ease,background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.scrolled{
  height:64px;
  background:rgba(251,250,247,.97);
  border-bottom:1px solid var(--line);
  box-shadow:0 2px 12px rgba(20,22,26,.04);
}
.nav-wrap{height:100%;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--ink);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:16px;letter-spacing:-.03em;
  transition:background .18s ease,transform .18s ease;
}
.brand:hover .brand-mark{background:var(--accent);transform:translateY(-1px)}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.02em;white-space:nowrap;color:var(--ink)}
.main-nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;min-width:0}
.nav-link{
  position:relative;padding:9px 12px;font-size:15px;font-weight:500;color:var(--ink-2);
  border-radius:8px;white-space:nowrap;transition:color .18s ease,background .18s ease;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:var(--accent)}
.nav-link.active{color:var(--ink);font-weight:700}
.nav-link.active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.search-wrap{
  display:flex;align-items:center;border:1px solid transparent;border-radius:999px;
  background:transparent;transition:background .18s ease,border-color .18s ease,padding .18s ease;
}
.search-wrap.open{background:#fff;border-color:var(--line);padding-left:14px}
.search-input{
  width:0;opacity:0;border:0;background:transparent;font-size:14px;color:var(--ink);
  padding:0;transition:width .18s ease,opacity .18s ease;
}
.search-input:focus{outline:none}
.search-wrap.open .search-input{width:176px;opacity:1}
.search-btn{
  flex:0 0 auto;width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:50%;
  display:grid;place-items:center;color:var(--ink-2);transition:.18s ease;
}
.search-btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.search-wrap.open .search-btn{border-color:transparent;background:transparent}
.menu-btn{
  display:none;width:40px;height:40px;border:1px solid var(--line);background:#fff;border-radius:10px;
  align-items:center;justify-content:center;color:var(--ink);transition:.18s ease;
}
.menu-btn:hover{border-color:var(--accent);color:var(--accent)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-weight:600;font-size:15px;border-radius:var(--r-m);padding:12px 22px;
  border:1.5px solid transparent;white-space:nowrap;
  transition:transform .18s ease,background .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 2px 12px rgba(226,96,63,.22)}
.btn-primary:hover{background:var(--accent-h);transform:translateY(-1px);box-shadow:0 8px 24px rgba(226,96,63,.26);color:#fff}
.btn-primary:active{background:var(--accent-a);transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);background:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:10px}

/* ---------- 首屏 ---------- */
.hero{position:relative;padding:146px 0 100px;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-160px;right:-140px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(226,96,63,.10) 0%,rgba(226,96,63,0) 66%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--accent);
  background:var(--accent-soft);padding:6px 14px;border-radius:999px;letter-spacing:.02em;
}
.hero h1{font-size:52px;line-height:1.16;letter-spacing:-.02em;font-weight:800;margin:22px 0 18px}
.hero-sub{font-size:18px;color:var(--ink-2);line-height:1.72;max-width:520px}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}
.hero-anchors{
  display:flex;gap:4px;margin-top:40px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:20px;
}
.hero-anchors a{position:relative;font-size:14px;color:var(--ink-3);padding:5px 10px;border-radius:8px;transition:.18s ease}
.hero-anchors a::after{
  content:"";position:absolute;left:10px;right:10px;bottom:-1px;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transition:transform .2s ease;
}
.hero-anchors a:hover{color:var(--accent)}
.hero-anchors a.active{color:var(--ink);font-weight:600}
.hero-anchors a.active::after{transform:scaleX(1)}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:4/3.15;object-fit:cover;border-radius:var(--r-l);
  border:1px solid var(--line);box-shadow:var(--sh-2);
}
.hero-deco{
  position:absolute;top:-14px;right:18px;width:96px;height:96px;
  border-top:2px solid var(--accent);border-right:2px solid var(--accent);
  border-radius:0 18px 0 0;opacity:.55;pointer-events:none;
}
.hero-float{
  position:absolute;left:-24px;bottom:-26px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-m);padding:14px 20px;box-shadow:var(--sh-2);
  display:flex;align-items:center;gap:12px;
}
.hero-float .dot{
  width:9px;height:9px;border-radius:50%;background:var(--accent);flex:0 0 auto;
  box-shadow:0 0 0 4px rgba(226,96,63,.14);
}
.hero-float strong{display:block;font-size:14.5px;font-weight:700;letter-spacing:-.01em}
.hero-float span{display:block;font-size:12.5px;color:var(--ink-4);margin-top:1px}

/* ---------- 通用分区 ---------- */
.section{padding:100px 0}
.section-alt{background:var(--bg-2)}
.section-head{max-width:740px;margin-bottom:52px}
.section-label{font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--accent);text-transform:uppercase}
.section-head h2{font-size:34px;font-weight:800;letter-spacing:-.02em;line-height:1.26;margin:12px 0 14px}
.section-head p{font-size:16.5px;color:var(--ink-3);line-height:1.82}
.reveal{opacity:1;transform:none}
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.js .reveal.in{opacity:1;transform:none}

/* ---------- 卖点 ---------- */
.feature-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:64px;align-items:start}
.feature-aside h2{font-size:32px;font-weight:800;letter-spacing:-.02em;line-height:1.3;margin:12px 0 18px}
.feature-aside p{font-size:16px;color:var(--ink-3);line-height:1.85}
.text-link{
  display:inline-flex;align-items:center;gap:7px;margin-top:24px;font-size:15px;font-weight:600;color:var(--accent);
}
.text-link i{transition:transform .2s ease}
.text-link:hover i{transform:translateX(4px)}
.feature-list{display:grid}
.feature-item{
  display:grid;grid-template-columns:66px 1fr;gap:20px;padding:26px 0;border-top:1px solid var(--line);
  transition:padding-left .22s ease;
}
.feature-item:last-child{border-bottom:1px solid var(--line)}
.feature-item:hover{padding-left:6px}
.feature-num{font-size:24px;font-weight:800;color:var(--accent);letter-spacing:-.03em;line-height:1.35}
.feature-item h3{font-size:19px;font-weight:700;letter-spacing:-.01em;margin-bottom:8px}
.feature-item p{font-size:15px;color:var(--ink-3);line-height:1.82}

/* ---------- 演示 ---------- */
.demo-row{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;padding:44px 0}
.demo-row + .demo-row{border-top:1px solid var(--line)}
.demo-row.reverse .demo-media{order:2}
.demo-media{
  border-radius:var(--r-l);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh-1);background:#fff;
}
.demo-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .3s ease}
.demo-media:hover img{transform:scale(1.02)}
.demo-idx{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.1em}
.demo-text h3{font-size:22px;font-weight:700;letter-spacing:-.01em;margin:10px 0 12px}
.demo-text > p{font-size:15.5px;color:var(--ink-3);line-height:1.86}
.demo-points{margin-top:18px;display:grid;gap:10px}
.demo-points li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);line-height:1.75}
.demo-points i{color:var(--accent);margin-top:5px;font-size:12px;flex:0 0 auto}

/* ---------- 证据 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:60px}
.stat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);padding:30px 26px;
  box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.stat-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--accent)}
.stat-num{font-size:40px;font-weight:800;letter-spacing:-.03em;line-height:1.1;color:var(--ink)}
.stat-num span{font-size:18px;font-weight:700;margin-left:4px;color:var(--ink-3)}
.stat-card p{margin-top:10px;font-size:14px;color:var(--ink-3);line-height:1.72}
.logo-strip{
  display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-m);overflow:hidden;
}
.logo-item{
  background:#fff;padding:24px 12px;display:grid;place-items:center;text-align:center;
  font-size:14.5px;font-weight:600;color:var(--ink-4);filter:grayscale(1);
  transition:color .22s ease,background .22s ease,filter .22s ease;
}
.logo-item:hover{color:var(--ink);filter:none;background:var(--accent-soft)}
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:56px}
.quote-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);padding:28px;
  box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease;
}
.quote-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.quote-card blockquote{font-size:15.5px;color:var(--ink-2);line-height:1.86}
.quote-who{margin-top:18px;padding-top:16px;border-top:1px solid var(--line-2);display:flex;align-items:center;gap:12px}
.quote-av{
  width:38px;height:38px;border-radius:50%;background:var(--bg-2);display:grid;place-items:center;
  font-weight:700;font-size:14px;color:var(--ink-2);flex:0 0 auto;
}
.quote-who strong{display:block;font-size:14.5px;font-weight:700}
.quote-who span{display:block;font-size:13px;color:var(--ink-4)}

/* ---------- 价格 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.price-card{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);
  padding:34px 30px;display:flex;flex-direction:column;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.price-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.price-card.featured{border:2px solid var(--accent);box-shadow:0 8px 24px rgba(226,96,63,.12)}
.price-badge{
  position:absolute;top:-14px;left:30px;background:var(--accent);color:#fff;font-size:12.5px;
  font-weight:700;padding:5px 14px;border-radius:999px;letter-spacing:.02em;
}
.price-name{font-size:18px;font-weight:750;letter-spacing:-.01em}
.price-desc{font-size:13.5px;color:var(--ink-4);margin-top:8px;line-height:1.65;min-height:44px}
.price-amount{margin:20px 0 4px;font-size:44px;font-weight:800;letter-spacing:-.03em;line-height:1}
.price-amount small{font-size:16px;font-weight:600;color:var(--ink-3);margin-left:4px}
.price-list{margin:24px 0 28px;display:grid;gap:12px;flex:1}
.price-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);line-height:1.62}
.price-list i{color:var(--accent);margin-top:5px;font-size:12px;flex:0 0 auto}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);overflow:hidden;
  display:flex;flex-direction:column;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--accent)}
.news-thumb{display:block;overflow:hidden;aspect-ratio:16/9;background:var(--bg-2)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.news-card:hover .news-thumb img{transform:scale(1.02)}
.news-body{padding:22px 24px 26px;display:flex;flex-direction:column;flex:1}
.news-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--ink-4);flex-wrap:wrap}
.tag{
  background:var(--accent-soft);color:var(--accent);font-size:12.5px;font-weight:600;
  padding:3px 10px;border-radius:var(--r-s);white-space:nowrap;
}
.news-title{
  font-size:17px;font-weight:700;line-height:1.5;letter-spacing:-.01em;margin:14px 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-title a:hover{color:var(--accent)}
.news-excerpt{
  font-size:14.5px;color:var(--ink-3);line-height:1.75;margin-bottom:18px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-link{margin-top:auto;font-size:14px;font-weight:600;color:var(--accent);display:inline-flex;align-items:center;gap:7px}
.news-link i{transition:transform .2s ease}
.news-link:hover i{transform:translateX(4px)}
.news-empty{
  background:var(--surface);border:1px dashed var(--line);border-radius:var(--r-l);
  padding:56px 24px;text-align:center;color:var(--ink-3);font-size:15.5px;
}
.news-empty a{color:var(--accent);font-weight:600;margin-left:6px}
.news-more{display:flex;justify-content:center;margin-top:44px}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line);transition:background .2s ease}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:22px 4px;background:none;border:0;text-align:left;
  font-size:17px;font-weight:650;letter-spacing:-.01em;color:var(--ink);
  transition:color .18s ease;
}
.faq-q:hover{color:var(--accent)}
.faq-q i{flex:0 0 auto;color:var(--ink-4);font-size:14px;transition:transform .2s ease,color .2s ease}
.faq-item.open .faq-q{color:var(--accent)}
.faq-item.open .faq-q i{transform:rotate(90deg);color:var(--accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a-inner{
  padding:0 4px 24px;font-size:15.5px;color:var(--ink-3);line-height:1.86;max-width:760px;
}
.faq-item.open .faq-a-inner{background:transparent}

/* ---------- 底部 CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--ink);color:#fff;border-radius:var(--r-l);
  padding:64px 56px;display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;
}
.cta-band::after{
  content:"";position:absolute;right:-120px;bottom:-160px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(226,96,63,.28) 0%,rgba(226,96,63,0) 68%);pointer-events:none;
}
.cta-band h2{position:relative;font-size:32px;font-weight:800;letter-spacing:-.02em;line-height:1.3;color:#fff;z-index:1}
.cta-band p{position:relative;font-size:16px;color:rgba(255,255,255,.72);margin-top:14px;line-height:1.82;max-width:620px;z-index:1}
.cta-actions{position:relative;display:flex;flex-direction:column;gap:14px;align-items:flex-start;z-index:1}
.cta-band .text-link{color:#fff;margin-top:0}
.cta-band .text-link:hover{color:var(--accent)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-2);border-top:1px solid var(--line);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:48px;padding-bottom:56px}
.footer-brand .brand{margin-bottom:4px}
.footer-desc{font-size:14.5px;color:var(--ink-3);line-height:1.88;margin-top:16px;max-width:320px}
.footer-key{
  display:inline-block;margin-top:18px;font-size:13px;font-weight:600;color:var(--accent);
  background:var(--accent-soft);padding:5px 12px;border-radius:var(--r-s);
}
.footer-col h4{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:18px;letter-spacing:.02em}
.footer-col li{line-height:2.05}
.footer-col a{font-size:14.5px;color:var(--ink-3);display:inline-block}
.footer-col a:hover{color:var(--accent);transform:translateX(3px)}
.footer-contact li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-3);line-height:1.9}
.footer-contact i{color:var(--accent);margin-top:6px;font-size:13px;flex:0 0 auto}
.footer-bottom{
  border-top:1px solid var(--line);padding:26px 0;display:flex;justify-content:space-between;
  align-items:center;gap:16px;flex-wrap:wrap;font-size:13.5px;color:var(--ink-4);
}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- 悬浮 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:900;
  background:var(--accent);color:#fff;font-weight:600;font-size:15px;
  padding:14px 24px;border-radius:999px;display:inline-flex;align-items:center;gap:10px;
  box-shadow:0 8px 24px rgba(226,96,63,.3);
  opacity:0;pointer-events:none;transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,background .18s ease;
}
.float-cta.show{opacity:1;pointer-events:auto;transform:none}
.float-cta:hover{background:var(--accent-h);color:#fff;transform:translateY(-2px)}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .hero h1{font-size:42px}
  .hero-grid{gap:40px}
  .feature-layout{grid-template-columns:1fr;gap:40px}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .logo-strip{grid-template-columns:repeat(3,1fr)}
  .quote-grid{grid-template-columns:1fr 1fr}
  .price-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .cta-band{grid-template-columns:1fr;padding:48px 40px;gap:28px}
}
@media (max-width:991px){
  .menu-btn{display:inline-flex}
  .main-nav{
    position:fixed;top:60px;left:0;right:0;height:calc(100vh - 60px);
    background:var(--bg);border-top:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:2px;
    padding:22px 20px 48px;overflow-y:auto;
    transform:translateY(-10px);opacity:0;pointer-events:none;
    transition:transform .22s ease,opacity .22s ease;
  }
  .main-nav.open{transform:none;opacity:1;pointer-events:auto}
  .nav-link{padding:15px 14px;font-size:16px;border-radius:10px}
  .nav-link::after{display:none}
  .nav-link.active{background:var(--accent-soft);color:var(--accent)}
  .drawer-cta{display:flex;margin-top:18px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .site-header,.site-header.scrolled{height:60px}
  .brand-text{font-size:15.5px}
  .brand-mark{width:30px;height:30px;font-size:14px;border-radius:9px}
  .search-wrap{display:none}
  .hero{padding:104px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:32px;line-height:1.24;margin:18px 0 14px}
  .hero-sub{font-size:16px}
  .hero-actions{gap:10px;margin-top:26px}
  .hero-actions .btn{flex:1 1 auto}
  .hero-anchors{margin-top:30px;padding-top:16px;gap:2px}
  .hero-float{left:12px;bottom:-18px;padding:12px 16px}
  .hero-deco{width:64px;height:64px;right:12px}
  .section{padding:64px 0}
  .section-head{margin-bottom:34px}
  .section-head h2{font-size:26px}
  .section-head p{font-size:15.5px}
  .feature-aside h2{font-size:25px}
  .feature-item{grid-template-columns:46px 1fr;gap:14px;padding:22px 0}
  .feature-num{font-size:20px}
  .demo-row{grid-template-columns:1fr;gap:26px;padding:34px 0}
  .demo-row.reverse .demo-media{order:0}
  .demo-text h3{font-size:19px}
  .stat-grid{grid-template-columns:1fr 1fr;gap:16px}
  .stat-card{padding:22px 18px}
  .stat-num{font-size:30px}
  .stat-num span{font-size:15px}
  .logo-strip{grid-template-columns:repeat(2,1fr)}
  .logo-item{padding:18px 10px;font-size:13.5px}
  .quote-grid{grid-template-columns:1fr;margin-top:36px}
  .price-card{padding:28px 22px}
  .price-amount{font-size:36px}
  .news-grid{grid-template-columns:1fr}
  .faq-q{font-size:15.5px;padding:18px 2px}
  .faq-a-inner{font-size:15px;padding-bottom:20px}
  .cta-band{padding:38px 24px;border-radius:var(--r-m)}
  .cta-band h2{font-size:23px}
  .cta-band p{font-size:15px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .site-footer{padding:56px 0 0}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:40px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;
    padding:15px 20px;transform:translateY(100%);
  }
  .float-cta.show{transform:none}
}
@media (max-width:520px){
  .hero h1{font-size:29px}
  .stat-grid{grid-template-columns:1fr}
  .btn{padding:11px 18px;font-size:14.5px}
  .hero-anchors a{font-size:13.5px;padding:5px 8px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  .js .reveal{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --ink:#14161A;
  --ink-soft:#33383F;
  --muted:#6B7280;
  --muted-2:#8A9099;
  --line:#E6E2DA;
  --bg:#FBFAF7;
  --surface:#FFFFFF;
  --surface-2:#F4F1EA;
  --accent:#E2571E;
  --accent-hover:#C94A16;
  --accent-active:#B03F10;
  --accent-soft:#FDEEE7;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:20px;
  --shadow-1:0 2px 12px rgba(20,22,26,.06);
  --shadow-2:0 8px 24px rgba(20,22,26,.10);
  --space-section:104px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.002em;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea{font:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--radius-m);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  border:1.5px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(226,87,30,.18)}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 10px 22px rgba(226,87,30,.24)}
.btn-primary:active{background:var(--accent-active);transform:translateY(0);box-shadow:0 4px 10px rgba(226,87,30,.18)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--surface);border-color:var(--ink);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0);background:var(--surface-2)}
.btn-light{background:#fff;color:var(--accent);box-shadow:0 6px 16px rgba(0,0,0,.12)}
.btn-light:hover{background:#FFF6F1;transform:translateY(-1px)}
.btn-light:active{transform:translateY(0);background:#FFEDE4}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:var(--radius-s)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--accent);transition:gap .2s ease,color .2s ease}
.link-arrow i{transition:transform .2s ease}
.link-arrow:hover{gap:10px;color:var(--accent-hover)}
.link-arrow:hover i{transform:translateX(2px)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(251,250,247,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{background:rgba(255,255,255,.95);border-bottom-color:var(--line);box-shadow:0 2px 14px rgba(20,22,26,.05)}
.header-inner{display:flex;align-items:center;gap:28px;min-height:64px;transition:min-height .25s ease}
.site-header.is-scrolled .header-inner{min-height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:10px;flex-shrink:0;
  background:var(--accent);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;letter-spacing:-.02em;
  transition:background-color .2s ease,transform .2s ease;
}
.brand:hover .brand-mark{background:var(--accent-hover);transform:rotate(-4deg)}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.02em;white-space:nowrap}
.nav-main{display:flex;align-items:center;gap:26px;margin-left:6px;flex:1 1 auto}
.nav-main a{
  position:relative;font-size:15px;color:var(--ink-soft);font-weight:500;
  padding:6px 0;transition:color .2s ease;white-space:nowrap;
}
.nav-main a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--accent);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.nav-main a:hover{color:var(--ink)}
.nav-main a:hover::after{transform:scaleX(1)}
.nav-main a.is-active{color:var(--accent);font-weight:600}
.nav-main a.is-active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto;flex-shrink:0}
.search-wrap{display:flex;align-items:center;gap:8px}
.search-toggle{
  width:38px;height:38px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink-soft);border:1px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.search-toggle:hover{background:var(--surface);border-color:var(--line);color:var(--accent)}
.search-toggle.is-active{color:var(--accent);border-color:var(--line);background:var(--surface)}
.search-form{
  width:0;opacity:0;overflow:hidden;
  transition:width .18s ease,opacity .18s ease;
}
.search-form.is-open{width:220px;opacity:1}
.search-form input{
  width:220px;padding:9px 14px;font-size:14px;
  border:1px solid var(--line);border-radius:var(--radius-s);
  background:var(--surface);color:var(--ink);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-form input::placeholder{color:var(--muted-2)}
.search-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}
.menu-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  align-items:center;justify-content:center;font-size:18px;
  border:1px solid var(--line);color:var(--ink);
  transition:background-color .2s ease,color .2s ease;
}
.menu-toggle:hover{background:var(--surface);color:var(--accent)}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,22,26,.42);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:95;
  background:var(--surface);border-left:1px solid var(--line);
  padding:22px 22px 28px;display:flex;flex-direction:column;gap:18px;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.4,0,.2,1);
  overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{
  width:38px;height:38px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);font-size:17px;
  transition:background-color .2s ease,color .2s ease;
}
.drawer-close:hover{background:var(--surface-2);color:var(--accent)}
.drawer-nav{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line);padding-top:14px}
.drawer-nav a{
  padding:13px 4px;font-size:16px;color:var(--ink-soft);font-weight:500;
  border-bottom:1px solid var(--line);transition:color .2s ease,padding-left .2s ease;
}
.drawer-nav a:hover{color:var(--accent);padding-left:8px}
.drawer-nav a.is-active{color:var(--accent);font-weight:600}
.drawer-cta{margin-top:auto;width:100%}

/* ---------- 文章头部 ---------- */
.article-hero{padding:44px 0 8px;border-bottom:1px solid var(--line)}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:22px;flex-wrap:wrap}
.breadcrumb a{color:var(--muted);transition:color .2s ease}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--muted-2)}
.breadcrumb .current{color:var(--ink-soft);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.3;font-weight:800;letter-spacing:-.02em;
  max-width:900px;margin-bottom:20px;
}
.article-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--muted);padding-bottom:26px}
.meta-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--radius-s);
  background:var(--accent-soft);color:var(--accent);font-weight:600;font-size:13px;
}
.meta-item{display:inline-flex;align-items:center;gap:6px}
.meta-divider{width:1px;height:14px;background:var(--line)}

/* ---------- 正文 ---------- */
.article-main{padding:56px 0 0}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px}
.article-body{max-width:760px;margin:0 auto;width:100%;font-size:17px;line-height:1.9;color:var(--ink-soft)}
.article-body h2{
  font-size:clamp(23px,2.4vw,30px);font-weight:800;letter-spacing:-.015em;
  color:var(--ink);line-height:1.4;margin:2.1em 0 .8em;
  padding-left:14px;border-left:4px solid var(--accent);
}
.article-body h3{font-size:20px;font-weight:700;color:var(--ink);line-height:1.5;margin:1.7em 0 .6em}
.article-body h4{font-size:17px;font-weight:700;color:var(--ink);margin:1.4em 0 .5em}
.article-body p{margin:0 0 1.4em}
.article-body a{color:var(--accent);border-bottom:1px solid var(--accent-soft);transition:border-color .2s ease}
.article-body a:hover{border-bottom-color:var(--accent)}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.3em}
.article-body ul li,.article-body ol li{margin-bottom:.55em;position:relative}
.article-body ul li{list-style:none;padding-left:4px}
.article-body ul li::before{
  content:"";position:absolute;left:-16px;top:.66em;
  width:6px;height:6px;border-radius:50%;background:var(--accent);
}
.article-body ol{list-style:decimal}
.article-body ol li{list-style:decimal}
.article-body blockquote{
  margin:1.7em 0;padding:18px 22px;
  border-left:3px solid var(--accent);background:var(--surface);
  border-radius:0 var(--radius-m) var(--radius-m) 0;
  color:var(--ink-soft);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--radius-m);margin:1.7em 0;box-shadow:var(--shadow-1)}
.article-body figure{margin:1.7em 0}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:-.9em;padding-bottom:.4em}
.article-body table{
  width:100%;border-collapse:collapse;font-size:15px;
  display:block;overflow-x:auto;margin:1.6em 0;
  border:1px solid var(--line);border-radius:var(--radius-m);
}
.article-body th{background:var(--accent-soft);color:var(--ink);font-weight:700;text-align:left}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line);white-space:nowrap}
.article-body tr:last-child td{border-bottom:0}
.article-body pre{
  background:#1B1E23;color:#EDEDEA;padding:18px 20px;border-radius:var(--radius-m);
  overflow-x:auto;font-size:14px;line-height:1.7;margin:1.6em 0;
}
.article-body code{font-family:Menlo,Consolas,Monaco,monospace;font-size:.92em}
.article-body p code,.article-body li code{background:var(--surface-2);padding:2px 6px;border-radius:6px;color:var(--accent-active)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}
.article-body strong{color:var(--ink);font-weight:700}

/* ---------- 空状态 ---------- */
.empty-state{
  text-align:center;padding:64px 28px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-l);box-shadow:var(--shadow-1);
}
.empty-state h2{font-size:24px;font-weight:800;color:var(--ink);margin-bottom:12px;padding:0;border:0}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:24px}

/* ---------- 相关推荐 ---------- */
.related{padding:var(--space-section) 0 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px;flex-wrap:wrap}
.section-head h2{font-size:clamp(24px,2.6vw,32px);font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.section-head p{font-size:15px;color:var(--muted);margin-top:10px;max-width:620px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);
  box-shadow:var(--shadow-1);
  transition:box-shadow .25s ease,transform .25s ease,border-color .25s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--accent)}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .25s ease-out}
.card:hover .card-media img{transform:scale(1.02)}
.card-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:18px;font-weight:700;line-height:1.5;color:var(--ink);letter-spacing:-.01em}
.card-body p{font-size:14px;line-height:1.75;color:var(--muted);flex:1}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted-2);padding-top:4px}
.tag{
  display:inline-flex;align-items:center;padding:4px 10px;
  border-radius:var(--radius-s);background:var(--surface-2);
  color:var(--ink-soft);font-size:12px;font-weight:600;
}

/* ---------- CTA ---------- */
.article-cta{padding:var(--space-section) 0}
.cta-box{
  position:relative;overflow:hidden;
  background:var(--accent);color:#fff;border-radius:var(--radius-l);
  padding:64px 56px;display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;
  box-shadow:0 18px 40px rgba(226,87,30,.22);
}
.cta-box::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;
  border-radius:50%;background:rgba(255,255,255,.10);
}
.cta-box h2{font-size:clamp(24px,2.8vw,34px);font-weight:800;letter-spacing:-.02em;line-height:1.35;margin-bottom:14px;position:relative;z-index:1}
.cta-box p{font-size:15px;line-height:1.8;color:rgba(255,255,255,.9);position:relative;z-index:1;max-width:520px}
.cta-actions{display:flex;flex-direction:column;align-items:flex-start;gap:14px;position:relative;z-index:1}
.cta-actions .link-arrow{color:#fff;opacity:.9}
.cta-actions .link-arrow:hover{color:#fff;opacity:1}

/* ---------- 悬浮 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 20px;border-radius:999px;
  background:var(--ink);color:#fff;font-size:14px;font-weight:600;
  box-shadow:0 10px 26px rgba(20,22,26,.24);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease,background-color .2s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--accent)}
.float-cta i{transition:transform .2s ease}
.float-cta:hover i{transform:translateX(2px)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#C9CDD3;padding:76px 0 30px;margin-top:var(--space-section)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:44px}
.footer-brand .brand{margin-bottom:18px}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark{background:var(--accent)}
.footer-desc{font-size:14px;line-height:1.85;color:#9AA1AA;margin-bottom:16px;max-width:320px}
.footer-key{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.04em;
  color:var(--accent);border:1px solid rgba(226,87,30,.4);
  padding:5px 12px;border-radius:var(--radius-s);
}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.01em}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:#9AA1AA;transition:color .2s ease}
.footer-col a:hover{color:#fff}
.footer-contact li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:#9AA1AA;line-height:1.7}
.footer-contact i{color:var(--accent);margin-top:4px;font-size:13px}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.10);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:13px;color:#7C838C;flex-wrap:wrap;
}
.footer-bottom a{color:#9AA1AA;transition:color .2s ease}
.footer-bottom a:hover{color:#fff}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px)}
.reveal.is-in{opacity:1;transform:translateY(0);transition:opacity .4s ease,transform .4s ease}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  :root{--space-section:80px}
  .container{padding:0 24px}
  .nav-main{gap:18px}
  .nav-main a{font-size:14px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-box{grid-template-columns:1fr;padding:52px 40px}
}
@media (max-width:768px){
  :root{--space-section:64px}
  .container{padding:0 20px}
  .header-inner{min-height:56px;gap:14px}
  .nav-main,.search-wrap{display:none}
  .menu-toggle{display:inline-flex}
  .article-hero{padding:30px 0 6px}
  .article-meta{gap:12px}
  .meta-divider{display:none}
  .article-main{padding:40px 0 0}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{padding-left:12px;font-size:23px}
  .card-grid{grid-template-columns:1fr}
  .cta-box{padding:40px 26px;border-radius:var(--radius-l)}
  .float-cta{
    right:0;left:0;bottom:0;border-radius:0;
    justify-content:center;padding:15px 20px;transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0)}
  .site-footer{padding:56px 0 26px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:520px){
  .article-title{font-size:27px}
  .article-meta{font-size:12.5px}
  .btn{padding:12px 18px;font-size:14px}
  .section-head{margin-bottom:26px}
}

/* roulang page: category1 */
:root{
  --accent:#e4572e;
  --accent-hover:#c9481f;
  --accent-active:#ad3c17;
  --accent-soft:rgba(228,87,46,.08);
  --accent-line:rgba(228,87,46,.30);

  --ink:#14161a;
  --ink-2:#383d45;
  --muted:#71767f;
  --line:#e7e3db;
  --line-strong:#d8d3c9;

  --bg:#fbfaf7;
  --surface:#ffffff;
  --surface-2:#f5f2ec;
  --surface-3:#efebe2;

  --r-s:8px;
  --r-m:14px;
  --r-l:20px;

  --sh-1:0 2px 12px rgba(20,22,26,.05);
  --sh-2:0 8px 24px rgba(20,22,26,.10);

  --container:1200px;
  --gap:24px;
  --nav-h:64px;
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:90px;}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote{margin:0;padding:0;}
html,body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--ink-2);text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
a:hover{color:var(--accent);}
ul,ol{list-style:none;}
button{font-family:inherit;font-size:inherit;background:none;border:0;cursor:pointer;color:inherit;}
input,textarea{font-family:inherit;font-size:16px;}
h1,h2,h3,h4{font-weight:800;letter-spacing:-.015em;line-height:1.28;color:var(--ink);margin:0;}
h1{font-size:clamp(30px,4.6vw,50px);}
h2{font-size:clamp(24px,3.2vw,34px);}
h3{font-size:clamp(18px,1.6vw,21px);font-weight:700;letter-spacing:-.01em;}
h4{font-size:16px;font-weight:700;}
p{color:var(--ink-2);}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}

.section{padding:104px 0;}
.section--tight{padding:72px 0;}
.section--surface{background:var(--surface);}
.section--soft{background:var(--surface-2);}
.section--dark{background:#16181c;color:#f3f1ec;}
.section--dark h2,.section--dark h3,.section--dark p{color:#f3f1ec;}
.section--dark p{color:#b9bcc2;}

.section-head{max-width:760px;margin-bottom:52px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--accent);text-transform:uppercase;
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);display:inline-block;border-radius:2px;}
.section-head p{margin-top:16px;font-size:16.5px;color:var(--muted);}
.section--dark .section-head p{color:#a8acb3;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-m);
  font-size:15px;font-weight:700;line-height:1.2;
  border:1.5px solid transparent;cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn i{font-size:14px;}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 2px 10px rgba(228,87,46,.22);}
.btn-primary:hover{background:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(228,87,46,.26);}
.btn-primary:active{background:var(--accent-active);transform:translateY(0);box-shadow:0 2px 8px rgba(228,87,46,.2);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--ink);}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft);}
.btn-ghost:active{border-color:var(--accent-active);color:var(--accent-active);}
.btn-light{background:#fff;color:var(--ink);border-color:#fff;}
.btn-light:hover{background:#f3f1ec;color:var(--accent);}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-block{width:100%;}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:700;color:var(--accent);
  border-bottom:1.5px solid var(--accent-line);
  padding-bottom:2px;
}
.text-link i{transition:transform .2s ease;}
.text-link:hover{color:var(--accent-hover);border-color:var(--accent-hover);}
.text-link:hover i{transform:translateX(3px);}

/* ---------- badges / tags ---------- */
.tag{
  display:inline-flex;align-items:center;
  padding:4px 11px;border-radius:var(--r-s);
  font-size:12.5px;font-weight:700;letter-spacing:.02em;
  background:var(--accent-soft);color:var(--accent);
}
.tag--neutral{background:var(--surface-3);color:var(--muted);}
.badge-recommend{
  position:absolute;top:-13px;left:50%;transform:translateX(-50%);
  background:var(--accent);color:#fff;font-size:12.5px;font-weight:700;
  padding:5px 14px;border-radius:999px;white-space:nowrap;
}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(251,250,247,.74);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,height .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(251,250,247,.97);
  border-bottom-color:var(--line);
  box-shadow:0 4px 18px rgba(20,22,26,.05);
}
.header-inner{
  height:var(--nav-h);
  display:flex;align-items:center;gap:28px;
  transition:height .25s ease;
}
.site-header.is-scrolled .header-inner{height:56px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:32px;height:32px;border-radius:9px;
  background:var(--accent);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:16px;letter-spacing:-.02em;
  box-shadow:0 3px 10px rgba(228,87,46,.25);
}
.brand-text{font-size:16.5px;font-weight:800;color:var(--ink);letter-spacing:-.01em;}
.brand:hover .brand-text{color:var(--accent);}

.main-nav{display:flex;align-items:center;gap:26px;flex:1;min-width:0;}
.main-nav a{
  position:relative;font-size:14.5px;font-weight:600;color:var(--ink-2);
  padding:6px 0;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;
  height:2px;border-radius:2px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.main-nav a:hover{color:var(--accent);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--ink);font-weight:700;}
.main-nav a.active::after{transform:scaleX(1);}

.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;margin-left:auto;}
.search-wrap{display:flex;align-items:center;}
.search-toggle{
  width:38px;height:38px;border-radius:var(--r-s);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink-2);transition:background-color .2s ease,color .2s ease;
}
.search-toggle:hover{background:var(--surface-3);color:var(--accent);}
.search-field{
  width:0;opacity:0;overflow:hidden;
  transition:width .22s ease,opacity .2s ease,margin .22s ease;
}
.search-wrap.is-open .search-field{width:220px;opacity:1;margin-right:6px;}
.search-field input{
  width:100%;height:38px;padding:0 14px;
  border:1px solid var(--line-strong);border-radius:var(--r-s);
  background:var(--surface);color:var(--ink);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-field input::placeholder{color:#a5a9b0;}
.search-field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft);}

.menu-toggle{
  display:none;width:40px;height:40px;border-radius:var(--r-s);
  align-items:center;justify-content:center;color:var(--ink);
  transition:background-color .2s ease;
}
.menu-toggle:hover{background:var(--surface-3);color:var(--accent);}

/* drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,22,26,.42);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);z-index:100;
  background:var(--surface);padding:22px 22px 30px;
  transform:translateX(102%);transition:transform .28s ease;
  display:flex;flex-direction:column;box-shadow:-8px 0 30px rgba(20,22,26,.12);
}
.nav-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px;}
.drawer-close{
  width:38px;height:38px;border-radius:var(--r-s);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--ink-2);transition:background-color .2s ease,color .2s ease;
}
.drawer-close:hover{background:var(--surface-3);color:var(--accent);}
.drawer-nav{display:flex;flex-direction:column;gap:2px;}
.drawer-nav a{
  padding:13px 12px;border-radius:var(--r-s);font-size:15.5px;font-weight:600;
  border-left:3px solid transparent;
}
.drawer-nav a:hover{background:var(--surface-2);color:var(--accent);}
.drawer-nav a.active{border-left-color:var(--accent);background:var(--accent-soft);color:var(--accent);}
.drawer-foot{margin-top:auto;padding-top:24px;border-top:1px solid var(--line);}
.drawer-foot p{font-size:13.5px;color:var(--muted);margin-bottom:14px;}

/* ---------- hero (category) ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:calc(var(--nav-h) + 68px) 0 88px;
  background:
    radial-gradient(900px 420px at 88% -10%,rgba(228,87,46,.09),transparent 62%),
    linear-gradient(180deg,#fdfcf9 0%,var(--bg) 100%);
  border-bottom:1px solid var(--line);
}
.hero::after{
  content:"";position:absolute;right:-80px;top:120px;width:360px;height:360px;
  border:1px dashed var(--line-strong);border-radius:50%;opacity:.6;pointer-events:none;
}
.hero-grid{gap:56px;align-items:center;position:relative;z-index:1;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:20px;}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:#b8bcc3;}
.breadcrumb .current{color:var(--ink-2);font-weight:600;}
.hero h1{margin-bottom:18px;}
.hero-sub{font-size:17.5px;font-weight:600;color:var(--ink-2);margin-bottom:14px;}
.hero-desc{font-size:16px;color:var(--muted);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-anchors{
  display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:34px;
  padding-top:22px;border-top:1px solid var(--line);
}
.hero-anchors a{
  position:relative;font-size:14px;font-weight:600;color:var(--muted);padding-bottom:4px;
}
.hero-anchors a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:16px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.hero-anchors a:hover{color:var(--accent);}
.hero-anchors a:hover::after{transform:scaleX(1);}

.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-l);border:1px solid var(--line);
  box-shadow:var(--sh-2);
}
.hero-visual::before{
  content:"";position:absolute;left:-18px;bottom:-18px;width:120px;height:120px;
  background:var(--accent-soft);border-radius:var(--r-l);z-index:-1;
}
.hero-float-card{
  position:absolute;left:-24px;bottom:26px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);
  padding:14px 18px;box-shadow:var(--sh-1);display:flex;align-items:center;gap:12px;
}
.hero-float-card i{color:var(--accent);font-size:18px;}
.hero-float-card strong{display:block;font-size:14.5px;color:var(--ink);}
.hero-float-card span{font-size:12.5px;color:var(--muted);}

/* ---------- media rows ---------- */
.media-row{gap:56px;align-items:center;margin-bottom:84px;}
.media-row:last-child{margin-bottom:0;}
.media-figure img{
  width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:var(--r-l);border:1px solid var(--line);box-shadow:var(--sh-1);
  transition:transform .3s ease,box-shadow .3s ease;
}
.media-figure:hover img{transform:scale(1.015);box-shadow:var(--sh-2);}
.media-body h3{margin-bottom:14px;}
.media-body p{font-size:16px;margin-bottom:16px;}
.media-list{display:flex;flex-direction:column;gap:12px;margin-top:20px;}
.media-list li{display:flex;gap:10px;font-size:15px;color:var(--ink-2);}
.media-list i{color:var(--accent);font-size:14px;margin-top:5px;}
.step-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;margin-bottom:16px;
  background:var(--accent-soft);color:var(--accent);font-weight:800;font-size:14px;
}

/* ---------- number list ---------- */
.num-list{display:flex;flex-direction:column;gap:0;}
.num-item{
  display:flex;gap:22px;padding:26px 0;
  border-bottom:1px solid var(--line);
  transition:background-color .2s ease;
}
.num-item:first-child{border-top:1px solid var(--line);}
.num-item:hover .num-item-title{color:var(--accent);}
.num-item:hover .num-idx{background:var(--accent);color:#fff;border-color:var(--accent);}
.num-idx{
  flex:0 0 46px;height:46px;border-radius:var(--r-m);
  border:1px solid var(--line-strong);background:var(--surface);
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;color:var(--accent);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.num-item-title{font-size:17.5px;font-weight:700;color:var(--ink);margin-bottom:8px;transition:color .2s ease;}
.num-item p{font-size:15px;color:var(--muted);max-width:860px;}
.num-item .text-link{margin-top:10px;font-size:13.5px;}

/* ---------- stat grid ---------- */
.stat-grid{gap:28px;}
.stat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-l);
  padding:30px 26px;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.stat-card:hover{transform:translateY(-2px);border-color:var(--accent-line);box-shadow:var(--sh-2);}
.stat-num{font-size:38px;font-weight:800;letter-spacing:-.03em;color:var(--accent);line-height:1.1;}
.stat-num small{font-size:16px;font-weight:700;margin-left:4px;color:var(--ink-2);}
.stat-title{font-size:16px;font-weight:700;color:var(--ink);margin:12px 0 8px;}
.stat-card p{font-size:14.5px;color:var(--muted);}

/* ---------- checklist ---------- */
.check-grid{gap:18px;}
.check-item{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-m);
  padding:20px 22px;transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.check-item:hover{border-color:var(--accent-line);box-shadow:var(--sh-1);transform:translateY(-2px);}
.check-item i{
  color:var(--accent);font-size:17px;margin-top:3px;
}
.check-item strong{display:block;font-size:15.5px;color:var(--ink);margin-bottom:5px;}
.check-item span{font-size:14px;color:var(--muted);}

/* ---------- faq ---------- */
.faq-list{max-width:880px;margin:0 auto;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:16px 4px;text-align:left;
  transition:color .2s ease;
}
.faq-q h3{font-size:17px;font-weight:700;color:var(--ink);transition:color .2s ease;}
.faq-q:hover h3{color:var(--accent);}
.faq-arrow{
  flex:0 0 28px;height:28px;border-radius:8px;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--muted);font-size:13px;transition:transform .22s ease,color .22s ease,background-color .22s ease;
}
.faq-item.is-open .faq-arrow{transform:rotate(90deg);color:var(--accent);background:var(--accent-soft);}
.faq-item.is-open .faq-q h3{color:var(--accent);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a-inner{
  padding:2px 4px 24px;font-size:15.5px;color:var(--muted);
  background:linear-gradient(180deg,var(--surface-2),transparent);
  border-radius:var(--r-m);padding-left:18px;padding-right:18px;padding-top:16px;
}
.faq-a-inner p+p{margin-top:10px;}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:#16181c;color:#fff;border-radius:var(--r-l);
  padding:64px 56px;
}
.cta-band::before{
  content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;
  border-radius:50%;background:radial-gradient(circle,rgba(228,87,46,.34),transparent 68%);
}
.cta-band h2{color:#fff;max-width:620px;}
.cta-band p{color:#b9bcc2;margin-top:16px;max-width:560px;font-size:16px;}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:22px;margin-top:32px;position:relative;z-index:1;}
.cta-band .text-link{color:#ffb59b;border-color:rgba(255,181,155,.45);}
.cta-band .text-link:hover{color:#fff;border-color:#fff;}

/* ---------- footer ---------- */
.site-footer{background:#111316;color:#c7cacf;padding:72px 0 28px;margin-top:0;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:44px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.09);
}
.footer-brand .brand-text{color:#fff;}
.footer-brand .brand:hover .brand-text{color:var(--accent);}
.footer-desc{font-size:14px;color:#9aa0a7;margin-top:18px;max-width:320px;}
.footer-key{
  display:inline-block;margin-top:16px;padding:5px 12px;border-radius:var(--r-s);
  background:rgba(228,87,46,.14);color:#ff9d7c;font-size:12.5px;font-weight:700;
}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:18px;font-weight:700;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14px;color:#9aa0a7;}
.footer-col a:hover{color:var(--accent);}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:#9aa0a7;align-items:flex-start;}
.footer-contact i{color:var(--accent);margin-top:5px;font-size:13px;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:24px;font-size:13.5px;color:#7d838a;
}
.footer-bottom a{color:#9aa0a7;}
.footer-bottom a:hover{color:var(--accent);}

/* ---------- floating cta ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 24px;border-radius:999px;
  background:var(--accent);color:#fff;font-weight:700;font-size:14.5px;
  box-shadow:0 12px 28px rgba(228,87,46,.32);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease,background-color .2s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--accent-hover);color:#fff;transform:translateY(-2px);}

/* ---------- animation ---------- */
.fade-up{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease;}
.fade-up.is-in{opacity:1;transform:translateY(0);}
@media (prefers-reduced-motion:reduce){
  .fade-up{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* ---------- responsive ---------- */
@media screen and (max-width:1024px){
  .container{padding:0 26px;}
  .section{padding:84px 0;}
  .main-nav{gap:18px;}
  .main-nav a{font-size:14px;}
  .hero{padding-top:calc(var(--nav-h) + 52px);}
  .hero-grid,.media-row{gap:38px;}
  .cta-band{padding:52px 40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media screen and (max-width:860px){
  .main-nav{display:none;}
  .menu-toggle{display:inline-flex;}
  .search-wrap.is-open .search-field{width:150px;}
}
@media screen and (max-width:768px){
  .section{padding:64px 0;}
  .container{padding:0 20px;}
  .hero{padding:calc(var(--nav-h) + 40px) 0 62px;}
  .hero::after{display:none;}
  .hero-grid{gap:36px;}
  .hero-visual{order:2;}
  .hero-float-card{left:12px;bottom:12px;}
  .media-row{margin-bottom:56px;}
  .media-row .media-figure{order:1;}
  .media-row .media-body{order:2;}
  .cta-band{padding:40px 24px;border-radius:var(--r-m);}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-desc{max-width:none;}
  .float-cta{
    left:16px;right:16px;bottom:14px;border-radius:var(--r-m);
    justify-content:center;
  }
  .num-item{gap:16px;}
  .num-idx{flex:0 0 40px;height:40px;font-size:14px;}
  .stat-num{font-size:32px;}
}
@media screen and (max-width:520px){
  h1{font-size:29px;line-height:1.32;}
  .hero-actions .btn{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-anchors{gap:6px 16px;}
  .search-wrap.is-open .search-field{width:118px;}
  .faq-q h3{font-size:15.5px;}
  .cta-actions{flex-direction:column;align-items:stretch;gap:16px;}
  .cta-actions .btn{width:100%;}
}

/* roulang page: category3 */
/* ===== 设计变量 ===== */
:root{
  --bg:#FBFAF7;
  --surface:#FFFFFF;
  --surface-soft:#F5F2EC;
  --ink:#14161A;
  --ink-2:#3A3F47;
  --muted:#6E727A;
  --line:#E6E1D9;
  --line-2:#F0ECE5;
  --accent:#E4572E;
  --accent-hover:#C94722;
  --accent-active:#A93A1B;
  --accent-soft:#FDEEE8;
  --deep:#101216;
  --r-s:8px;
  --r-m:14px;
  --r-l:20px;
  --sh-1:0 2px 12px rgba(20,22,26,.06);
  --sh-2:0 8px 24px rgba(20,22,26,.10);
  --sec-gap:112px;
  --header-h:64px;
}

/* ===== 基础 ===== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
body.drawer-open{overflow:hidden;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800;letter-spacing:-0.015em;line-height:1.22;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--accent);}
ul,ol{margin:0;padding:0;list-style:none;}
img{max-width:100%;display:block;border-style:none;}
button{font-family:inherit;font-size:inherit;border:0;background:none;color:inherit;cursor:pointer;}
input{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
::selection{background:var(--accent-soft);color:var(--accent-active);}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:32px;
  padding-right:32px;
}

/* ===== 通用文字层级 ===== */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--accent);
  text-transform:uppercase;
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--accent);
  display:inline-block;
}
.sec-title{font-size:34px;font-weight:800;margin-bottom:16px;}
.sec-desc{font-size:16.5px;color:var(--ink-2);max-width:720px;}
.sec-head{margin-bottom:52px;}
.sec-head.center{text-align:center;}
.sec-head.center .sec-desc{margin-left:auto;margin-right:auto;}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-m);
  font-size:15.5px;
  font-weight:600;
  letter-spacing:.01em;
  border:1.5px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 4px 14px rgba(228,87,46,.20);}
.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff;transform:translateY(-1px);box-shadow:0 8px 20px rgba(228,87,46,.26);}
.btn-primary:active{background:var(--accent-active);border-color:var(--accent-active);transform:translateY(0);box-shadow:0 2px 8px rgba(228,87,46,.22);}
.btn-ghost{background:transparent;color:var(--ink);border-color:#CFC9BE;}
.btn-ghost:hover{background:var(--surface);border-color:var(--ink);color:var(--ink);transform:translateY(-1px);box-shadow:var(--sh-1);}
.btn-ghost:active{transform:translateY(0);background:var(--surface-soft);}
.btn-sm{height:40px;padding:0 18px;font-size:14.5px;border-radius:var(--r-s);}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:600;color:var(--accent);}
.link-arrow i{transition:transform .2s ease;font-size:13px;}
.link-arrow:hover i{transform:translateX(4px);}

/* ===== 顶部导航 ===== */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:90;
  height:var(--header-h);
  display:flex;
  align-items:center;
  background:rgba(251,250,247,.72);
  backdrop-filter:saturate(150%) blur(8px);
  border-bottom:1px solid transparent;
  transition:height .25s ease,background-color .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  height:56px;
  background:rgba(251,250,247,.96);
  border-bottom-color:var(--line);
  box-shadow:0 1px 10px rgba(20,22,26,.045);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  width:100%;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{
  width:32px;height:32px;
  border-radius:var(--r-s);
  background:var(--ink);
  color:#fff;
  font-size:16px;
  font-weight:800;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:0;
}
.brand-text{
  font-size:17px;
  font-weight:800;
  letter-spacing:-0.01em;
  white-space:nowrap;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:12px;
}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:var(--ink-2);
  border-radius:var(--r-s);
  transition:color .18s ease,background-color .18s ease;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s ease;
}
.main-nav a:hover{color:var(--ink);background:var(--surface-soft);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.is-active{color:var(--ink);font-weight:700;}
.main-nav a.is-active::after{transform:scaleX(1);}
.header-actions{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:10px;
}
.search-toggle{
  width:38px;height:38px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  color:var(--ink-2);
  border:1px solid transparent;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.search-toggle:hover{background:var(--surface-soft);color:var(--ink);border-color:var(--line);}
.search-toggle:active{background:var(--line-2);}
.search-box{
  width:0;
  overflow:hidden;
  transition:width .18s ease;
}
.search-box.is-open{width:220px;}
.search-box input{
  width:220px;
  height:38px;
  padding:0 14px;
  border-radius:var(--r-s);
  border:1px solid var(--line);
  background:var(--surface);
  color:var(--ink);
  font-size:14.5px;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search-box input::placeholder{color:#A9A49B;}
.search-box input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px rgba(228,87,46,.16);}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border-radius:var(--r-s);
  color:var(--ink);
  border:1px solid var(--line);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{background:var(--surface-soft);}
.nav-toggle:active{background:var(--line-2);}

/* 移动抽屉 */
.drawer{
  position:fixed;
  inset:0;
  z-index:120;
  background:rgba(16,18,22,.42);
  opacity:0;
  visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease;
}
.drawer.is-open{opacity:1;visibility:visible;}
.drawer-panel{
  position:absolute;
  top:0;right:0;
  width:min(320px,86vw);
  height:100%;
  background:var(--surface);
  padding:22px 22px 32px;
  display:flex;
  flex-direction:column;
  transform:translateX(100%);
  transition:transform .28s ease;
  box-shadow:-8px 0 28px rgba(20,22,26,.14);
  overflow-y:auto;
}
.drawer.is-open .drawer-panel{transform:translateX(0);}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
  margin-bottom:18px;
}
.drawer-close{
  width:36px;height:36px;
  border-radius:var(--r-s);
  display:flex;align-items:center;justify-content:center;
  color:var(--ink-2);
  border:1px solid var(--line);
}
.drawer-close:hover{background:var(--surface-soft);color:var(--ink);}
.drawer-close:active{background:var(--line-2);}
.drawer-nav{display:flex;flex-direction:column;gap:2px;}
.drawer-nav a{
  padding:13px 12px;
  border-radius:var(--r-s);
  font-size:16px;
  color:var(--ink-2);
  border-left:2px solid transparent;
}
.drawer-nav a:hover{background:var(--surface-soft);color:var(--ink);}
.drawer-nav a.is-active{color:var(--accent);font-weight:700;border-left-color:var(--accent);background:var(--accent-soft);}
.drawer-foot{margin-top:auto;padding-top:24px;}
.drawer-foot .btn{width:100%;}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--muted);
  padding-top:calc(var(--header-h) + 36px);
  margin-bottom:26px;
}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb span.sep{color:#BFB9AE;}
.breadcrumb .current{color:var(--ink-2);font-weight:600;}

/* ===== 内页首屏 ===== */
.page-hero{
  position:relative;
  padding-bottom:var(--sec-gap);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  top:-120px;right:-160px;
  width:520px;height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(228,87,46,.10),rgba(228,87,46,0) 68%);
  pointer-events:none;
}
.hero-split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
  align-items:center;
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:30px;
  padding:0 14px;
  border-radius:999px;
  background:var(--accent-soft);
  color:var(--accent-active);
  font-size:13px;
  font-weight:600;
  letter-spacing:.04em;
  margin-bottom:22px;
}
.hero-h1{
  font-size:52px;
  line-height:1.12;
  margin-bottom:22px;
}
.hero-h1 .hl{
  color:var(--accent);
  position:relative;
  white-space:nowrap;
}
.hero-sub{
  font-size:18px;
  font-weight:600;
  color:var(--ink-2);
  margin-bottom:18px;
}
.hero-lead{
  font-size:16.5px;
  color:var(--muted);
  max-width:560px;
  margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;margin-bottom:34px;}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:26px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.hero-meta div{display:flex;flex-direction:column;gap:2px;}
.hero-meta strong{font-size:24px;font-weight:800;letter-spacing:-0.02em;}
.hero-meta span{font-size:13px;color:var(--muted);letter-spacing:.02em;}
.hero-visual{
  position:relative;
  border-radius:var(--r-l);
  overflow:hidden;
  box-shadow:var(--sh-2);
  aspect-ratio:4 / 3;
  background:var(--surface-soft);
}
.hero-visual img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.hero-visual:hover img{transform:scale(1.02);}
.hero-visual::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(16,18,22,0) 48%,rgba(16,18,22,.42) 100%);
  pointer-events:none;
}
.hero-visual .caption{
  position:absolute;
  left:22px;bottom:20px;right:22px;
  color:#fff;
  font-size:14px;
  letter-spacing:.02em;
  z-index:2;
  font-weight:500;
}
.hero-visual .grid-deco{
  position:absolute;
  top:18px;left:18px;
  width:56px;height:56px;
  border-top:2px solid rgba(255,255,255,.72);
  border-left:2px solid rgba(255,255,255,.72);
  z-index:2;
}

/* ===== 板块通用 ===== */
.section{padding-bottom:var(--sec-gap);}
.section.tight{padding-bottom:80px;}
.section.alt{
  background:var(--surface);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding-top:var(--sec-gap);
  padding-bottom:var(--sec-gap);
}

/* ===== 要点卡 ===== */
.fact-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.fact-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-l);
  padding:30px 26px 28px;
  box-shadow:var(--sh-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.fact-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#DAD3C7;}
.fact-num{
  font-size:13px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--accent);
  margin-bottom:16px;
}
.fact-card h3{font-size:19px;margin-bottom:10px;}
.fact-card p{font-size:15px;color:var(--muted);line-height:1.72;}
.fact-icon{
  width:40px;height:40px;
  border-radius:var(--r-s);
  background:var(--surface-soft);
  color:var(--ink);
  display:flex;align-items:center;justify-content:center;
  margin-bottom:20px;
  font-size:16px;
}

/* ===== 图文交替 ===== */
.duo{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.duo + .duo{margin-top:88px;}
.duo.reverse .duo-media{order:2;}
.duo.reverse .duo-body{order:1;}
.duo-media{
  border-radius:var(--r-l);
  overflow:hidden;
  aspect-ratio:16 / 11;
  background:var(--surface-soft);
  box-shadow:var(--sh-1);
}
.duo-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.duo-media:hover img{transform:scale(1.02);}
.duo-body h3{font-size:26px;margin-bottom:16px;}
.duo-body > p{color:var(--ink-2);margin-bottom:22px;}
.tick-list{display:flex;flex-direction:column;gap:14px;}
.tick-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:15.5px;
  color:var(--ink-2);
}
.tick-list i{
  color:var(--accent);
  font-size:15px;
  margin-top:5px;
  flex:0 0 auto;
}

/* ===== 流程步骤 ===== */
.steps{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  border-top:1px solid var(--line);
}
.step{
  position:relative;
  padding:34px 26px 8px 0;
  border-right:1px solid var(--line);
}
.step:last-child{border-right:0;}
.step::before{
  content:"";
  position:absolute;
  top:-1px;left:0;
  width:44px;height:3px;
  background:var(--accent);
  transition:width .25s ease;
}
.step:hover::before{width:78px;}
.step-num{
  font-size:42px;
  font-weight:800;
  letter-spacing:-0.03em;
  color:#DCD6CB;
  line-height:1;
  margin-bottom:16px;
  transition:color .25s ease;
}
.step:hover .step-num{color:var(--accent);}
.step h3{font-size:19px;margin-bottom:10px;}
.step p{font-size:15px;color:var(--muted);line-height:1.7;}

/* ===== 条目列表 ===== */
.entry-list{
  border-top:1px solid var(--line);
}
.entry{
  display:grid;
  grid-template-columns:72px 1fr auto;
  gap:24px;
  align-items:center;
  padding:28px 12px 28px 20px;
  border-bottom:1px solid var(--line);
  border-left:3px solid transparent;
  transition:background-color .2s ease,border-left-color .2s ease,padding-left .2s ease;
}
.entry:hover{
  background:var(--surface);
  border-left-color:var(--accent);
  padding-left:26px;
}
.entry-idx{
  font-size:15px;
  font-weight:800;
  letter-spacing:.14em;
  color:#C6BFB3;
  transition:color .2s ease;
}
.entry:hover .entry-idx{color:var(--accent);}
.entry-body h3{font-size:19px;margin-bottom:6px;}
.entry-body p{font-size:15px;color:var(--muted);max-width:760px;}
.entry-arrow{
  color:#C6BFB3;
  font-size:14px;
  transition:transform .2s ease,color .2s ease;
}
.entry:hover .entry-arrow{color:var(--accent);transform:translateX(4px);}

/* ===== 深色说明区 ===== */
.dark-band{
  background:var(--deep);
  color:#EDE9E2;
  border-radius:var(--r-l);
  padding:56px 56px;
  display:grid;
  grid-template-columns:1.1fr 1fr;
  gap:56px;
  align-items:center;
}
.dark-band h2{color:#fff;font-size:30px;margin-bottom:16px;}
.dark-band p{color:#A9A69F;font-size:16px;}
.dark-metrics{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:28px;
}
.dark-metrics div{
  border-left:2px solid var(--accent);
  padding-left:18px;
}
.dark-metrics strong{
  display:block;
  font-size:30px;
  font-weight:800;
  letter-spacing:-0.02em;
  color:#fff;
  line-height:1.2;
}
.dark-metrics span{font-size:13.5px;color:#8E8B85;}

/* ===== FAQ ===== */
.faq{max-width:900px;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-m);
  background:var(--surface);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:#D8D1C5;box-shadow:var(--sh-1);}
.faq-item.is-open{border-color:var(--accent);box-shadow:var(--sh-1);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:56px;
  padding:16px 24px;
  text-align:left;
  font-size:17px;
  font-weight:700;
  letter-spacing:-0.01em;
  color:var(--ink);
  transition:color .18s ease,background-color .18s ease;
}
.faq-q:hover{color:var(--accent);background:var(--surface-soft);}
.faq-q:active{background:var(--line-2);}
.faq-q i{
  flex:0 0 auto;
  font-size:14px;
  color:var(--accent);
  transition:transform .2s ease;
}
.faq-item.is-open .faq-q i{transform:rotate(90deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
  background:var(--surface-soft);
}
.faq-a-inner{
  padding:20px 24px 24px;
  font-size:15.5px;
  color:var(--ink-2);
  line-height:1.8;
}

/* ===== CTA 横幅 ===== */
.cta-band{
  background:var(--accent);
  border-radius:var(--r-l);
  padding:64px 56px;
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  position:relative;
  overflow:hidden;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-80px;top:-80px;
  width:280px;height:280px;
  border-radius:50%;
  border:32px solid rgba(255,255,255,.10);
}
.cta-band h2{
  color:#fff;
  font-size:32px;
  margin-bottom:14px;
  position:relative;
  z-index:2;
}
.cta-band p{
  color:rgba(255,255,255,.86);
  font-size:16.5px;
  max-width:620px;
  position:relative;
  z-index:2;
}
.cta-actions{
  display:flex;
  flex-direction:column;
  gap:14px;
  align-items:flex-start;
  position:relative;
  z-index:2;
  flex:0 0 auto;
}
.btn-light{background:#fff;color:var(--accent-active);border-color:#fff;}
.btn-light:hover{background:#FDF2ED;color:var(--accent-active);border-color:#FDF2ED;transform:translateY(-1px);}
.btn-light:active{background:#F7E4DB;transform:translateY(0);}
.cta-link{
  color:#fff;
  font-size:15px;
  font-weight:600;
  border-bottom:1px solid rgba(255,255,255,.55);
  padding-bottom:2px;
}
.cta-link:hover{color:#fff;border-bottom-color:#fff;}

/* ===== 悬浮 CTA ===== */
.float-cta{
  position:fixed;
  right:28px;
  bottom:28px;
  z-index:80;
  height:50px;
  padding:0 24px;
  border-radius:999px;
  background:var(--ink);
  color:#fff;
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:15px;
  font-weight:600;
  box-shadow:var(--sh-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .28s ease,visibility .28s ease,transform .28s ease,background-color .2s ease;
}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--accent);color:#fff;}
.float-cta:active{background:var(--accent-active);}
.float-cta i{font-size:13px;}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--deep);
  color:#A9A69F;
  padding:76px 0 30px;
  border-top:1px solid #1B1E23;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:44px;
  padding-bottom:52px;
  border-bottom:1px solid #23262C;
}
.site-footer .brand{color:#fff;margin-bottom:18px;}
.site-footer .brand-mark{background:var(--accent);}
.site-footer .brand-text{color:#fff;}
.footer-desc{font-size:14.5px;line-height:1.8;color:#8E8B85;max-width:320px;margin-bottom:16px;}
.footer-key{
  display:inline-block;
  padding:5px 12px;
  border-radius:999px;
  background:rgba(228,87,46,.14);
  color:#F0A78D;
  font-size:12.5px;
  letter-spacing:.06em;
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  font-weight:700;
  letter-spacing:.03em;
  margin-bottom:20px;
}
.footer-col ul{display:flex;flex-direction:column;gap:12px;}
.footer-col a{font-size:14.5px;color:#A9A69F;}
.footer-col a:hover{color:#fff;}
.footer-contact li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14.5px;
  color:#A9A69F;
}
.footer-contact i{color:var(--accent);font-size:14px;margin-top:5px;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  justify-content:space-between;
  align-items:center;
  padding-top:26px;
  font-size:13.5px;
  color:#7C7A75;
}
.footer-bottom a{color:#A9A69F;}
.footer-bottom a:hover{color:#fff;}

/* ===== 进场动效 ===== */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .4s ease,transform .4s ease;
}
.reveal.is-visible{opacity:1;transform:translateY(0);}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  :root{--sec-gap:88px;}
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .hero-h1{font-size:42px;}
  .hero-split{gap:40px;}
  .fact-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:repeat(2,1fr);}
  .step:nth-child(2){border-right:0;}
  .step{padding:30px 22px 24px 0;}
  .duo{gap:40px;}
  .dark-band{grid-template-columns:1fr;gap:36px;padding:44px 36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .search-box.is-open{width:170px;}
  .search-box input{width:170px;}
}
@media (max-width:768px){
  :root{--sec-gap:64px;--header-h:56px;}
  body{font-size:16px;}
  .container{padding-left:20px;padding-right:20px;}
  .sec-title{font-size:26px;}
  .sec-head{margin-bottom:36px;}
  .page-hero{padding-bottom:var(--sec-gap);}
  .hero-split{grid-template-columns:1fr;gap:36px;}
  .hero-h1{font-size:32px;}
  .hero-sub{font-size:16.5px;}
  .hero-visual{aspect-ratio:16 / 11;}
  .hero-actions{gap:12px;}
  .hero-actions .btn{flex:1 1 100%;}
  .hero-meta{gap:18px;}
  .hero-meta strong{font-size:20px;}
  .search-box{display:none;}
  .search-toggle{display:none;}
  .fact-grid{grid-template-columns:1fr;gap:16px;}
  .duo{grid-template-columns:1fr;gap:26px;}
  .duo + .duo{margin-top:56px;}
  .duo.reverse .duo-media{order:0;}
  .duo.reverse .duo-body{order:0;}
  .duo-body h3{font-size:22px;}
  .steps{grid-template-columns:1fr;}
  .step{border-right:0;border-bottom:1px solid var(--line);padding:26px 0 24px;}
  .step:last-child{border-bottom:0;}
  .entry{grid-template-columns:48px 1fr;gap:16px;padding:22px 8px 22px 16px;}
  .entry-arrow{display:none;}
  .entry:hover{padding-left:20px;}
  .dark-band{padding:32px 24px;border-radius:var(--r-m);}
  .dark-band h2{font-size:23px;}
  .dark-metrics{gap:20px;}
  .dark-metrics strong{font-size:24px;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:38px 26px;gap:26px;}
  .cta-band h2{font-size:24px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .float-cta{
    left:0;right:0;bottom:0;
    height:56px;
    border-radius:0;
    justify-content:center;
    transform:translateY(100%);
  }
  .float-cta.is-show{transform:translateY(0);}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:36px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .site-footer{padding-top:56px;}
}
@media (max-width:520px){
  .hero-h1{font-size:28px;}
  .hero-h1 .hl{white-space:normal;}
  .brand-text{font-size:15.5px;}
  .sec-title{font-size:23px;}
  .faq-q{font-size:16px;padding:14px 18px;}
  .faq-a-inner{padding:16px 18px 20px;}
  .cta-band h2{font-size:21px;}
  .dark-metrics{grid-template-columns:1fr;}
}

/* roulang page: category2 */
:root{
  --ink:#14161A;
  --ink-2:#3C4149;
  --muted:#6C727C;
  --line:#E6E2DA;
  --line-strong:#D8D3C9;
  --bg:#FBFAF7;
  --surface:#FFFFFF;
  --soft:#F3F0EA;
  --accent:#E4572E;
  --accent-hover:#C9481F;
  --accent-active:#AE3D18;
  --accent-soft:rgba(228,87,46,.10);
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --sh-1:0 2px 12px rgba(20,22,26,.06);
  --sh-2:0 8px 24px rgba(20,22,26,.12);
  --container:1200px;
  --header-h:72px;
  --sec:104px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16.5px;
  line-height:1.78;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
button{font-family:inherit;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.24;color:var(--ink)}
h1{font-size:clamp(32px,4.4vw,50px)}
h2{font-size:clamp(24px,3vw,34px)}
h3{font-size:20px}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
::selection{background:var(--accent);color:#fff}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:var(--sec) 0}
.section--soft{background:var(--soft)}
.section--tight{padding-top:calc(var(--sec) - 24px)}

/* ---------- 通用元素 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:800;letter-spacing:.14em;
  color:var(--accent);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent);display:block}
.section-head{max-width:720px;margin-bottom:52px}
.section-head p{color:var(--muted);font-size:17px;margin-top:16px;margin-bottom:0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;border-radius:var(--r-md);
  padding:14px 26px;font-size:16px;font-weight:700;letter-spacing:.01em;
  transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px rgba(228,87,46,.22)}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 10px 22px rgba(228,87,46,.26)}
.btn-primary:active{background:var(--accent-active);transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line-strong)}
.btn-ghost:hover{background:var(--surface);border-color:var(--ink);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0);background:var(--soft)}
.btn-sm{padding:10px 18px;font-size:14.5px;border-radius:var(--r-sm)}
.btn-link{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--accent)}
.btn-link i{transition:transform .2s ease}
.btn-link:hover{color:var(--accent-hover);text-decoration:underline;text-underline-offset:4px}
.btn-link:hover i{transform:translateX(4px)}

.tag{
  display:inline-flex;align-items:center;
  padding:5px 12px;border-radius:var(--r-sm);
  background:var(--accent-soft);color:var(--accent-active);
  font-size:13px;font-weight:700;letter-spacing:.02em;
}
.tag--neutral{background:var(--soft);color:var(--ink-2)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:var(--header-h);display:flex;align-items:center;
  background:rgba(251,250,247,.82);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:height .25s ease,background-color .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  height:64px;background:rgba(251,250,247,.97);
  border-bottom-color:var(--line);box-shadow:0 2px 12px rgba(20,22,26,.05);
}
.header-inner{display:flex;align-items:center;gap:28px;width:100%}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--ink);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;letter-spacing:-.02em;
  transition:background-color .2s ease;
}
.brand:hover .brand-mark{background:var(--accent)}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}

.main-nav{margin-left:auto}
.main-nav ul{display:flex;align-items:center;gap:26px}
.main-nav a{
  position:relative;font-size:15px;font-weight:600;color:var(--ink-2);
  padding:6px 0;display:inline-block;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.main-nav a:hover{color:var(--ink)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.is-active{color:var(--ink);font-weight:800}
.main-nav a.is-active::after{transform:scaleX(1)}
.drawer-cta{display:none}

.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--surface);color:var(--ink-2);
  display:inline-flex;align-items:center;justify-content:center;font-size:15px;
  transition:border-color .2s,color .2s,background-color .2s;
}
.icon-btn:hover{border-color:var(--ink);color:var(--ink)}
.icon-btn:active{background:var(--soft)}
.header-search{
  width:0;opacity:0;overflow:hidden;
  transition:width .18s ease,opacity .18s ease;
}
.header-search.is-open{width:220px;opacity:1}
.header-search input{
  width:100%;height:40px;padding:0 14px;font-size:14.5px;
  border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--surface);color:var(--ink);
}
.header-search input:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 2px var(--accent-soft)}
.nav-toggle{display:none}
.nav-overlay{
  position:fixed;inset:0;background:rgba(20,22,26,.42);
  opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;z-index:70;
}
.nav-overlay.is-open{opacity:1;visibility:visible}
body.nav-open{overflow:hidden}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:calc(var(--header-h) + 72px) 0 92px;
  background:linear-gradient(180deg,#FFFFFF 0%,var(--bg) 100%);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--line-strong),transparent);
}
.hero-grid{display:grid;grid-template-columns:6fr 5fr;gap:60px;align-items:center}
.crumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:22px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--accent)}
.crumb span[aria-current]{color:var(--ink-2);font-weight:600}
.hero-title{margin-bottom:20px}
.hero-lead{font-size:18px;color:var(--ink-2);max-width:560px}
.hero-lead strong{color:var(--ink);font-weight:700}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}

.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:5/4;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh-2);
}
.hero-badge{
  position:absolute;left:-18px;bottom:34px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 20px;box-shadow:var(--sh-2);max-width:230px;
}
.hero-badge strong{display:block;font-size:22px;font-weight:800;letter-spacing:-.02em}
.hero-badge span{font-size:13.5px;color:var(--muted);line-height:1.5;display:block;margin-top:4px}

/* ---------- 统计条 ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--surface);overflow:hidden;box-shadow:var(--sh-1);
}
.stat-cell{padding:30px 28px;border-right:1px solid var(--line)}
.stat-cell:last-child{border-right:0}
.stat-num{font-size:32px;font-weight:800;letter-spacing:-.03em;color:var(--ink);line-height:1.1}
.stat-num em{font-style:normal;font-size:15px;font-weight:700;color:var(--accent);margin-left:4px}
.stat-cell p{margin-top:8px;font-size:14px;color:var(--muted);line-height:1.6}

/* ---------- 模块卡片 ---------- */
.mod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.mod-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 28px;box-shadow:var(--sh-1);
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
  display:flex;flex-direction:column;height:100%;
}
.mod-card:hover{border-color:var(--accent);box-shadow:var(--sh-2);transform:translateY(-2px)}
.mod-icon{
  width:46px;height:46px;border-radius:12px;background:var(--soft);color:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;font-size:19px;margin-bottom:20px;
  transition:background-color .25s ease,color .25s ease;
}
.mod-card:hover .mod-icon{background:var(--accent);color:#fff}
.mod-card h3{margin-bottom:12px}
.mod-card p{color:var(--muted);font-size:15.5px;line-height:1.72}
.mod-card .mod-foot{margin-top:auto;padding-top:20px}
.mod-card .mod-foot a{font-size:14.5px;font-weight:700;color:var(--accent)}
.mod-card .mod-foot a:hover{text-decoration:underline;text-underline-offset:4px}

/* ---------- 图文交替 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split + .split{margin-top:88px}
.split-media{position:relative}
.split-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--sh-1);
  transition:transform .35s ease;
}
.split-media:hover img{transform:scale(1.015)}
.split-media .tag{position:absolute;top:18px;left:18px;background:rgba(255,255,255,.94);color:var(--accent-active);box-shadow:var(--sh-1)}
.split.reverse .split-media{order:2}
.split h3{font-size:clamp(22px,2.4vw,28px);margin-bottom:16px}
.split p{color:var(--ink-2);font-size:16.5px}
.check-list{margin-top:24px;display:grid;gap:12px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--ink-2)}
.check-list i{color:var(--accent);font-size:14px;margin-top:6px;flex:0 0 auto}

/* ---------- 条目列表 ---------- */
.entry-list{display:grid;gap:16px;max-width:960px}
.entry{
  display:grid;grid-template-columns:64px 1fr auto;gap:24px;align-items:center;
  background:var(--surface);border-left:3px solid var(--accent);
  border-radius:0 var(--r-md) var(--r-md) 0;
  padding:24px 28px;box-shadow:var(--sh-1);
  transition:box-shadow .25s ease,transform .25s ease,background-color .25s ease;
}
.entry:hover{box-shadow:var(--sh-2);transform:translateX(2px)}
.entry-num{font-size:20px;font-weight:800;color:var(--accent);letter-spacing:-.02em}
.entry h4{font-size:17px;font-weight:800;margin-bottom:6px}
.entry p{font-size:15px;color:var(--muted);line-height:1.7;margin:0}
.entry-link{font-size:14px;font-weight:700;color:var(--ink-2);white-space:nowrap}
.entry-link:hover{color:var(--accent)}

/* ---------- 流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:flow}
.flow-item{position:relative;padding-top:34px}
.flow-item::before{
  counter-increment:flow;content:"0" counter(flow);
  position:absolute;top:0;left:0;font-size:14px;font-weight:800;letter-spacing:.1em;color:var(--accent);
}
.flow-item::after{
  content:"";position:absolute;top:8px;left:44px;right:12px;height:1px;background:var(--line-strong);
}
.flow-item:last-child::after{display:none}
.flow-item h3{font-size:18px;margin-bottom:10px}
.flow-item p{font-size:15px;color:var(--muted);line-height:1.7}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:880px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item.is-open{border-color:var(--accent);box-shadow:var(--sh-1)}
.faq-q{margin:0;font-size:17px;font-weight:700}
.faq-q button{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:transparent;border:0;text-align:left;
  padding:0 24px;min-height:60px;font-size:17px;font-weight:700;color:var(--ink);
  line-height:1.5;
}
.faq-q button i{
  color:var(--accent);font-size:14px;flex:0 0 auto;
  transition:transform .22s ease;
}
.faq-item.is-open .faq-q button i{transform:rotate(90deg)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .3s ease;
}
.faq-a-inner{padding:0 24px 24px;color:var(--ink-2);font-size:15.5px;line-height:1.8;border-top:1px solid var(--line);padding-top:18px;margin:0 0 0}
.faq-a-inner p{margin-bottom:10px}
.faq-a-inner p:last-child{margin-bottom:0}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--ink);color:#fff;border-radius:var(--r-lg);
  padding:64px 56px;position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-140px;top:-120px;width:380px;height:380px;
  border-radius:50%;background:rgba(228,87,46,.16);
}
.cta-band .eyebrow{color:var(--accent)}
.cta-band h2{color:#fff;max-width:640px;position:relative;z-index:1}
.cta-band p{color:rgba(255,255,255,.74);max-width:560px;margin-top:16px;position:relative;z-index:1}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-top:32px;position:relative;z-index:1}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.4)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff}
.cta-note{font-size:14px;color:rgba(255,255,255,.6);position:relative;z-index:1;margin-top:22px}

/* ---------- 页脚 ---------- */
.site-footer{background:#111318;color:rgba(255,255,255,.72);padding:72px 0 32px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px}
.footer-brand .brand{margin-bottom:20px}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-mark{background:var(--accent)}
.footer-desc{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.6);max-width:320px}
.footer-key{
  display:inline-block;margin-top:18px;padding:6px 14px;border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.16);font-size:13px;letter-spacing:.04em;color:rgba(255,255,255,.78);
}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:20px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:12px}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.66)}
.footer-col a:hover{color:var(--accent)}
.footer-contact li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:rgba(255,255,255,.66);line-height:1.7}
.footer-contact i{color:var(--accent);font-size:14px;margin-top:5px}
.footer-bottom{
  margin-top:56px;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:13.5px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.7)}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- 悬浮 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:60;
  display:inline-flex;align-items:center;gap:10px;
  background:var(--accent);color:#fff;border-radius:999px;
  padding:14px 24px;font-size:15px;font-weight:700;
  box-shadow:0 10px 26px rgba(228,87,46,.32);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s ease,visibility .3s ease,transform .3s ease,background-color .2s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--accent-hover)}

/* ---------- 动效 ---------- */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.js .reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  :root{--sec:80px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-visual img{aspect-ratio:16/10}
  .hero-badge{left:auto;right:16px;bottom:-20px}
  .mod-grid{grid-template-columns:repeat(2,1fr)}
  .split{gap:40px}
  .flow{grid-template-columns:repeat(2,1fr);gap:32px}
  .flow-item:nth-child(2)::after{display:none}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .stat-cell:nth-child(2){border-right:0}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width:900px){
  :root{--header-h:60px}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(84vw,360px);
    background:var(--surface);z-index:85;
    flex-direction:column;align-items:stretch;
    padding:84px 28px 32px;margin:0;
    transform:translateX(103%);transition:transform .3s ease;
    box-shadow:-10px 0 34px rgba(20,22,26,.14);
    overflow-y:auto;display:flex;
  }
  .main-nav.is-open{transform:none}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:2px}
  .main-nav a{display:block;padding:14px 4px;font-size:16.5px;border-bottom:1px solid var(--line)}
  .main-nav a::after{display:none}
  .main-nav a.is-active{color:var(--accent)}
  .drawer-cta{display:block;margin-top:28px}
  .drawer-cta .btn{width:100%}
  .nav-toggle{display:inline-flex}
  .header-search{display:none}
  .header-actions .btn-sm{display:none}
}
@media (max-width:768px){
  :root{--sec:64px}
  body{font-size:16px}
  .container{padding:0 20px}
  .page-hero{padding:calc(var(--header-h) + 44px) 0 64px}
  .hero-lead{font-size:16.5px}
  .hero-actions .btn{width:100%}
  .section-head{margin-bottom:36px}
  .mod-grid{grid-template-columns:1fr;gap:18px}
  .split{grid-template-columns:1fr;gap:28px}
  .split.reverse .split-media{order:0}
  .split + .split{margin-top:56px}
  .entry{grid-template-columns:1fr;gap:12px;padding:22px 22px;border-radius:var(--r-md);border-left-width:3px}
  .entry-num{font-size:16px}
  .flow{grid-template-columns:1fr;gap:28px}
  .flow-item::after{display:none}
  .stat-strip{grid-template-columns:1fr}
  .stat-cell{border-right:0;border-bottom:1px solid var(--line)}
  .stat-cell:last-child{border-bottom:0}
  .faq-q button{padding:0 18px;font-size:16px;min-height:56px}
  .faq-a-inner{padding:16px 18px 22px}
  .cta-band{padding:44px 24px;border-radius:var(--r-md)}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .site-footer{padding:56px 0 26px}
  .float-cta{
    right:0;left:0;bottom:0;border-radius:0;justify-content:center;
    padding:15px 20px;width:100%;
  }
  .hero-badge{position:static;max-width:none;margin-top:18px}
}
@media (max-width:520px){
  h1{font-size:30px}
  .brand-text{font-size:16px}
  .stat-num{font-size:26px}
  .cta-band h2{font-size:24px}
}

/* roulang page: category4 */
/* ============ 设计变量 ============ */
:root{
  --bg:#FBFAF7;
  --surface:#FFFFFF;
  --surface-2:#F4F1EA;
  --ink:#14161A;
  --ink-soft:#3B4048;
  --muted:#71767F;
  --line:#E6E2DA;
  --line-strong:#D6D0C4;
  --accent:#E4572E;
  --accent-hover:#CB4A23;
  --accent-active:#B03F1C;
  --accent-soft:#FCEFE9;
  --radius-s:8px;
  --radius-m:14px;
  --radius-l:20px;
  --shadow-1:0 2px 12px rgba(20,22,26,.06);
  --shadow-2:0 8px 24px rgba(20,22,26,.10);
  --container:1200px;
  --nav-h:72px;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  padding-top:var(--nav-h);
  font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.is-locked{overflow:hidden}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.02em;line-height:1.28;color:var(--ink)}
p{margin:0}
a{color:inherit;text-decoration:none;transition:color .2s ease}
img{max-width:100%;display:block;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}

/* ============ 容器 ============ */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-m);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1.5px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .18s ease,background .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);transform:translateY(-1px);box-shadow:0 6px 18px rgba(228,87,46,.28)}
.btn-primary:active{background:var(--accent-active);border-color:var(--accent-active);transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft);transform:translateY(-1px)}
.btn-ghost:active{background:#F7E2D9;transform:translateY(0)}
.btn-light{background:#fff;color:var(--ink);border-color:#fff}
.btn-light:hover{background:var(--accent-soft);color:var(--accent);border-color:#fff;transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:12px}

.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:700;color:var(--accent);
  border-bottom:1.5px solid transparent;padding-bottom:2px;
  transition:border-color .2s ease,gap .2s ease,color .2s ease;
}
.text-link:hover{border-bottom-color:var(--accent);gap:10px}
.text-link:active{color:var(--accent-active)}

/* ============ 顶部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  height:var(--nav-h);
  background:rgba(251,250,247,.88);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:height .25s ease,background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  height:64px;background:rgba(255,255,255,.96);
  border-bottom-color:var(--line);box-shadow:0 2px 14px rgba(20,22,26,.05);
}
.header-inner{display:flex;align-items:center;gap:26px;height:100%}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:11px;background:var(--accent);color:#fff;
  display:grid;place-items:center;font-size:16px;font-weight:800;letter-spacing:0;
  box-shadow:0 4px 12px rgba(228,87,46,.28);transition:transform .2s ease;
}
.brand:hover .brand-mark{transform:translateY(-1px)}
.brand-text{font-size:17px;font-weight:800;letter-spacing:-.02em;white-space:nowrap;color:var(--ink)}
.brand:active .brand-mark{transform:translateY(0)}

.main-nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;min-width:0}
.main-nav a{
  position:relative;padding:9px 13px;font-size:15px;color:var(--ink-soft);
  border-radius:var(--radius-s);white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.main-nav a:hover{color:var(--ink);background:var(--surface-2)}
.main-nav a:active{background:#EDE8DE}
.main-nav a.is-active{color:var(--ink);font-weight:700}
.main-nav a.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;
  background:var(--accent);border-radius:2px;
}

.header-right{display:flex;align-items:center;gap:12px;flex:0 0 auto;position:relative}
.search-toggle{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--ink-soft);font-size:14px;
  transition:border-color .2s ease,color .2s ease,background .2s ease,transform .2s ease;
}
.search-toggle:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.search-toggle:active{transform:scale(.96)}

.search-box{
  position:absolute;top:calc(100% + 14px);right:0;width:300px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-m);
  box-shadow:var(--shadow-2);padding:12px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s;
}
.search-box.is-open{opacity:1;visibility:visible;transform:none}
.search-box label{display:block;font-size:12px;color:var(--muted);margin-bottom:8px;letter-spacing:.02em}
.search-input{
  display:flex;align-items:center;gap:8px;
  border:1px solid var(--line);border-radius:var(--radius-s);
  padding:0 12px;height:44px;background:var(--bg);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-input:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(228,87,46,.12)}
.search-input i{color:var(--muted);font-size:13px}
.search-input input{
  flex:1;border:0;background:transparent;outline:none;font-size:14px;color:var(--ink);
  font-family:inherit;min-width:0;
}
.search-input input::placeholder{color:#A6ABB3}

.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:border-color .2s ease,background .2s ease;
}
.nav-toggle:hover{border-color:var(--accent);background:var(--accent-soft)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s ease}

/* ============ 移动端抽屉 ============ */
.mobile-drawer{position:fixed;inset:0;z-index:200;visibility:hidden;pointer-events:none}
.mobile-drawer.is-open{visibility:visible;pointer-events:auto}
.drawer-backdrop{
  position:absolute;inset:0;background:rgba(20,22,26,.45);
  opacity:0;transition:opacity .26s ease;
}
.mobile-drawer.is-open .drawer-backdrop{opacity:1}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(330px,86vw);
  background:#fff;padding:22px;display:flex;flex-direction:column;
  transform:translateX(100%);transition:transform .28s cubic-bezier(.4,0,.2,1);
  box-shadow:-12px 0 40px rgba(20,22,26,.14);overflow-y:auto;
}
.mobile-drawer.is-open .drawer-panel{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-close{
  width:38px;height:38px;border-radius:12px;border:1px solid var(--line);
  display:grid;place-items:center;color:var(--ink-soft);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.drawer-close:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;flex:1}
.drawer-nav a{
  padding:13px 14px;border-radius:var(--radius-m);font-size:15px;color:var(--ink-soft);
  transition:background .2s ease,color .2s ease;
}
.drawer-nav a:hover{background:var(--surface-2);color:var(--ink)}
.drawer-nav a.is-active{background:var(--accent-soft);color:var(--accent);font-weight:700}
.drawer-foot{padding-top:20px;border-top:1px solid var(--line);margin-top:18px}
.drawer-foot .btn{width:100%}

/* ============ 页面 Hero ============ */
.page-hero{position:relative;overflow:hidden;padding:76px 0 88px;background:linear-gradient(180deg,#F7F3EC 0%,#FBFAF7 100%)}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  opacity:.18;pointer-events:none;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(90deg,rgba(20,22,26,.045) 0 1px,transparent 1px 120px);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.7),transparent 78%);
}
.page-hero-inner{position:relative;z-index:2;max-width:880px}

.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted);margin-bottom:24px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .current{color:var(--ink-soft)}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:20px;
  font-size:13px;font-weight:700;letter-spacing:.04em;color:var(--accent);
  background:var(--accent-soft);border-radius:999px;padding:6px 14px;
}
.eyebrow i{font-size:11px}

.page-hero h1{font-size:clamp(30px,4vw,48px);line-height:1.2;margin-bottom:20px;max-width:15em}
.lead{font-size:17px;line-height:1.9;color:var(--ink-soft);max-width:640px}

.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}

.hero-anchors{display:flex;flex-wrap:wrap;gap:6px;margin-top:38px}
.hero-anchors a{
  position:relative;padding:8px 15px;font-size:14px;color:var(--ink-soft);
  border-radius:999px;border:1px solid transparent;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.hero-anchors a:hover{color:var(--accent);border-color:var(--line);background:#fff}
.hero-anchors a:active{background:var(--accent-soft)}
.hero-anchors a.is-current{color:var(--accent);font-weight:700}
.hero-anchors a.is-current::after{
  content:"";position:absolute;left:15px;right:15px;bottom:3px;height:2px;
  background:var(--accent);border-radius:2px;
}

/* ============ 通用板块 ============ */
.section{padding:96px 0}
.section--tight{padding:76px 0}
.section--alt{background:var(--surface)}
.section--warm{background:var(--surface-2)}

.section-head{max-width:720px;margin-bottom:52px}
.section-head .kicker{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--accent);margin-bottom:14px;
}
.section-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:16px}
.section-head p{color:var(--muted);font-size:16px;line-height:1.85}

/* ============ 图文交替 ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.split + .split{margin-top:84px}
.split-media{
  border-radius:var(--radius-l);overflow:hidden;border:1px solid var(--line);
  background:var(--surface-2);aspect-ratio:16/11;box-shadow:var(--shadow-1);
  transition:box-shadow .3s ease,border-color .3s ease;
}
.split:hover .split-media{box-shadow:var(--shadow-2);border-color:var(--line-strong)}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease-out}
.split:hover .split-media img{transform:scale(1.02)}
.split--reverse .split-media{order:2}
.split--reverse .split-body{order:1}
.split-body h3{font-size:22px;margin-bottom:16px}
.split-body p{color:var(--ink-soft);font-size:16px;line-height:1.9;margin-bottom:14px}
.split-body p:last-child{margin-bottom:0}

.step-list{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.step-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink-soft)}
.step-list .dot{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;
  background:var(--accent-soft);color:var(--accent);
  display:grid;place-items:center;font-size:11px;font-weight:800;margin-top:3px;
}

/* ============ 技巧条目列表 ============ */
.tips{border-top:1px solid var(--line)}
.tip{
  position:relative;display:grid;grid-template-columns:76px 1fr;gap:26px;
  padding:30px 8px 30px 20px;border-bottom:1px solid var(--line);
  transition:background .25s ease,padding-left .25s ease;
}
.tip::before{
  content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;
  background:var(--accent);border-radius:3px;opacity:0;
  transition:opacity .25s ease;
}
.tip:hover{background:var(--surface);padding-left:26px}
.tip:hover::before{opacity:1}
.tip-num{
  font-size:30px;font-weight:800;line-height:1.1;letter-spacing:-.04em;
  color:var(--line-strong);transition:color .25s ease;
}
.tip:hover .tip-num{color:var(--accent)}
.tip-body h3{font-size:19px;margin-bottom:8px}
.tip-body p{font-size:15px;color:var(--muted);line-height:1.85}

/* ============ 数据条 ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:30px 26px;
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.stat:hover{border-color:var(--accent);box-shadow:var(--shadow-2);transform:translateY(-2px)}
.stat-num{font-size:42px;font-weight:800;letter-spacing:-.04em;line-height:1;color:var(--ink)}
.stat-num em{font-style:normal;font-size:15px;font-weight:700;color:var(--muted);margin-left:6px;letter-spacing:0}
.stat-label{margin-top:14px;font-size:14px;color:var(--muted);line-height:1.7}

/* ============ FAQ ============ */
.faq{max-width:880px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item h3{margin:0;font-size:inherit;font-weight:inherit;letter-spacing:normal}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:22px 4px;text-align:left;
  font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--accent)}
.faq-q:active{color:var(--accent-active)}
.faq-q .chev{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;
  display:grid;place-items:center;font-size:11px;color:var(--muted);
  background:var(--surface-2);
  transition:transform .22s ease,color .22s ease,background .22s ease;
}
.faq-item.is-open .faq-q .chev{transform:rotate(90deg);color:#fff;background:var(--accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{
  margin:0 4px 24px;padding:18px 20px;border-radius:var(--radius-m);
  background:var(--surface-2);color:var(--ink-soft);font-size:15.5px;line-height:1.9;
}

/* ============ 底部 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-l);
  background:#14161A;color:#fff;padding:64px 56px;
  display:grid;grid-template-columns:1.5fr 1fr;gap:44px;align-items:center;
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;
  border-radius:50%;background:radial-gradient(circle,rgba(228,87,46,.34),transparent 68%);
  pointer-events:none;
}
.cta-band h2{position:relative;z-index:2;color:#fff;font-size:clamp(24px,3vw,34px);margin-bottom:16px}
.cta-band p{position:relative;z-index:2;color:rgba(255,255,255,.72);font-size:16px;line-height:1.85;max-width:560px}
.cta-actions{position:relative;z-index:2;display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.cta-actions .text-link{color:#fff}
.cta-actions .text-link:hover{border-bottom-color:#fff}

/* ============ 悬浮 CTA ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:110;
  display:inline-flex;align-items:center;gap:10px;
  height:52px;padding:0 24px;border-radius:999px;
  background:var(--accent);color:#fff;font-size:15px;font-weight:700;
  box-shadow:0 10px 28px rgba(228,87,46,.34);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s,background .2s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:none}
.float-cta:hover{background:var(--accent-hover);transform:translateY(-2px)}
.float-cta:active{background:var(--accent-active);transform:translateY(0)}

/* ============ 页脚 ============ */
.site-footer{background:#14161A;color:rgba(255,255,255,.62);margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px;padding:76px 0 48px}
.site-footer .brand-text{color:#fff}
.footer-desc{margin:18px 0;font-size:14px;line-height:1.85;max-width:330px;color:rgba(255,255,255,.58)}
.footer-key{
  display:inline-block;font-size:12px;letter-spacing:.08em;color:var(--accent);
  border:1px solid rgba(228,87,46,.42);border-radius:999px;padding:5px 13px;
}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:20px;letter-spacing:.02em}
.footer-col ul li{margin-bottom:11px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.6);transition:color .2s ease,padding-left .2s ease}
.footer-col a:hover{color:var(--accent);padding-left:3px}
.footer-contact li{display:flex;gap:10px;font-size:14px;margin-bottom:13px;line-height:1.7}
.footer-contact i{color:var(--accent);margin-top:5px;font-size:13px}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  padding:24px 0 34px;border-top:1px solid rgba(255,255,255,.1);font-size:13px;
  color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer-bottom a:hover{color:var(--accent)}

/* ============ 滚动显现 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1100px){
  .main-nav a{padding:9px 9px;font-size:14px}
  .brand-text{font-size:16px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:36px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:900px){
  :root{--nav-h:56px}
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .brand-mark{width:30px;height:30px;border-radius:10px;font-size:14px}
  .brand-text{font-size:15px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section--tight{padding:56px 0}
  .section-head{margin-bottom:36px}
  .page-hero{padding:52px 0 64px}
  .page-hero h1{font-size:30px}
  .lead{font-size:16px}
  .split{grid-template-columns:1fr;gap:26px}
  .split + .split{margin-top:56px}
  .split--reverse .split-media{order:1}
  .split--reverse .split-body{order:2}
  .split-body h3{font-size:20px}
  .split-media{aspect-ratio:16/10}
  .stats{grid-template-columns:repeat(2,1fr);gap:16px}
  .stat{padding:24px 20px}
  .stat-num{font-size:34px}
  .tip{grid-template-columns:52px 1fr;gap:16px;padding:24px 8px 24px 16px}
  .tip-num{font-size:24px}
  .tip-body h3{font-size:17px}
  .cta-band{grid-template-columns:1fr;gap:28px;padding:44px 26px}
  .cta-actions{flex-direction:row;flex-wrap:wrap;align-items:center}
  .float-cta{
    right:0;left:0;bottom:0;justify-content:center;border-radius:0;
    height:56px;transform:translateY(100%);
  }
  .float-cta.is-visible{transform:none}
  .float-cta:hover{transform:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 36px}
  .footer-brand{grid-column:1 / -1}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-q{font-size:16px;padding:18px 4px}
  .faq-a-inner{font-size:15px;padding:16px}
}
@media (max-width:520px){
  .hero-actions .btn{width:100%}
  .stats{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .search-box{width:min(300px,calc(100vw - 40px));right:-52px}
  .cta-actions .btn{width:100%}
}