/* roulang page: index */
:root{
  --bg:#0C0A14;
  --bg-2:#131024;
  --surface:#181430;
  --surface-2:#211B3D;
  --primary:#7A3CFF;
  --primary-600:#6728F0;
  --secondary:#16E0C0;
  --accent:#FF6B4A;
  --text:#F4F2FF;
  --text-2:#B6AFD4;
  --text-3:#7C7699;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --r-card:14px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow:0 12px 32px rgba(9,6,22,.55);
  --shadow-lg:0 18px 46px rgba(9,6,22,.72);
  --t:220ms ease;
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:"Barlow","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button{font-family:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text)}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
input,textarea,select{font-family:inherit;font-size:15px}
.mono{font-family:var(--mono);font-weight:600;letter-spacing:.02em}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.container{max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-alt{background:var(--bg-2)}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;height:64px;
  background:rgba(12,10,20,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:height var(--t),background var(--t),border-color var(--t);
}
.site-header.is-stuck{height:56px;background:rgba(12,10,20,.9);border-bottom-color:var(--line)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:100%;gap:18px}
.nav-left{display:flex;align-items:center;gap:30px;min-width:0}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,#8B5CFF 0%,#6728F0 100%);
  clip-path:polygon(0 0,100% 0,100% 74%,74% 100%,0 100%);
}
.logo-mark svg{width:18px;height:18px}
.logo-text{font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{
  position:relative;display:inline-block;padding:8px 12px;border-radius:8px;
  font-size:14.5px;color:var(--text-2);transition:color var(--t),background var(--t);
}
.nav-menu a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-menu a:hover{color:var(--text);background:rgba(122,60,255,.1)}
.nav-menu a.is-active{color:var(--text)}
.nav-menu a.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.icon-btn{
  width:40px;height:40px;display:grid;place-items:center;border-radius:var(--r-btn);
  background:transparent;border:1px solid var(--line);cursor:pointer;transition:all var(--t);
}
.icon-btn:hover{border-color:var(--primary);background:rgba(122,60,255,.12)}
.icon-btn svg{width:18px;height:18px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--r-btn);background:transparent;border:1px solid var(--line);cursor:pointer;padding:0 11px}
.nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--text);margin:4px 0;transition:transform var(--t),opacity var(--t)}
.nav-toggle.is-open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:all var(--t);white-space:nowrap;
}
.btn-primary{background:linear-gradient(135deg,#8B5CFF 0%,#6728F0 100%);color:#F4F2FF}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 10px 26px rgba(122,60,255,.38)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);background:rgba(122,60,255,.12)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;
  color:var(--primary);padding-bottom:2px;
  background-image:linear-gradient(var(--primary),var(--primary));
  background-repeat:no-repeat;background-size:0 2px;background-position:left bottom;
  transition:background-size var(--t),color var(--t);
}
.btn-text:hover{background-size:100% 2px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:132px 0 76px;overflow:hidden;background:var(--bg)}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;pointer-events:none;
}
.hero::after{
  content:"";position:absolute;width:620px;height:620px;left:-180px;top:-220px;pointer-events:none;
  background:radial-gradient(circle,rgba(122,60,255,.16) 0%,rgba(122,60,255,0) 68%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  color:var(--secondary);border:1px solid rgba(22,224,192,.35);background:rgba(22,224,192,.08);
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--secondary);display:block}
.hero h1{
  margin-top:22px;font-size:clamp(30px,4.6vw,52px);font-weight:800;
  letter-spacing:-.02em;line-height:1.18;
}
.hero-sub{margin-top:20px;max-width:560px;font-size:17px;line-height:1.85;color:var(--text-2)}
.hero-actions{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px}
.trust-bar{margin-top:38px;display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:7px;height:34px;padding:0 14px;border-radius:var(--r-pill);
  font-size:13px;color:var(--text-2);border:1px solid var(--line);background:rgba(255,255,255,.02);
}
.chip b{color:var(--text);font-family:var(--mono);font-weight:700}
.chip svg{width:14px;height:14px;color:var(--secondary)}
.hero-visual{position:relative}
.hero-figure{
  position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-lg);background:var(--surface);aspect-ratio:4/3;
}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.hero-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,10,20,0) 40%,rgba(12,10,20,.72) 100%);
}
.hero-float{
  position:absolute;left:-18px;bottom:-26px;width:236px;padding:16px 18px;
  border-radius:var(--r-card);background:var(--surface-2);border:1px solid var(--line-strong);
  box-shadow:var(--shadow);z-index:3;
}
.hero-float span{display:block;font-size:12.5px;color:var(--text-3)}
.hero-float strong{display:block;margin-top:4px;font-size:15px;font-weight:600}
.hero-float .bar{margin-top:12px;height:6px;border-radius:3px;background:rgba(255,255,255,.08);overflow:hidden}
.hero-float .bar i{display:block;height:100%;width:76%;background:linear-gradient(90deg,#16E0C0,#7A3CFF)}

/* ---------- Anchor bar ---------- */
.anchor-bar{
  position:sticky;top:56px;z-index:60;
  background:rgba(12,10,20,.9);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.anchor-inner{display:flex;align-items:center;gap:8px;height:52px;overflow-x:auto;scrollbar-width:none}
.anchor-inner::-webkit-scrollbar{display:none}
.anchor-inner a{
  flex:0 0 auto;padding:7px 16px;border-radius:var(--r-pill);font-size:13.5px;
  color:var(--text-2);border:1px solid var(--line);transition:all var(--t);
}
.anchor-inner a:hover{color:var(--text);border-color:var(--line-strong)}
.anchor-inner a.is-current{color:var(--text);border-color:var(--primary);background:rgba(122,60,255,.12)}

/* ---------- Section heads ---------- */
.sec-head{max-width:740px;margin-bottom:46px}
.sec-eyebrow{display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--primary);text-transform:uppercase}
.sec-head h2{margin-top:14px;font-size:clamp(24px,3.2vw,36px);line-height:1.25;letter-spacing:-.01em}
.sec-head p{margin-top:14px;font-size:16px;color:var(--text-2);max-width:640px}
.sec-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:46px}
.sec-head-row .sec-head{margin-bottom:0}

/* ---------- Cards ---------- */
.card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;right:0;top:0;width:16px;height:16px;
  background:linear-gradient(225deg,transparent 49.5%,rgba(122,60,255,.45) 50%);
}
.card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-lg)}
.card h3{font-size:18px;font-weight:600;margin-top:16px}
.card p{margin-top:10px;font-size:14.5px;color:var(--text-2);line-height:1.75}
.card-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(122,60,255,.14);border:1px solid rgba(122,60,255,.3);color:var(--primary);
}
.card-icon svg{width:22px;height:22px}
.card-icon.is-cyan{background:rgba(22,224,192,.12);border-color:rgba(22,224,192,.3);color:var(--secondary)}

.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.bento .b-lg{grid-column:span 6;padding:28px}
.bento .b-md{grid-column:span 3}
.bento .b-sm{grid-column:span 4}
.bento .b-lg .card-figure{
  margin-top:20px;border-radius:12px;overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9;background:var(--bg-2);
}
.bento .b-lg .card-figure img{width:100%;height:100%;object-fit:cover}

/* ---------- Showcase ---------- */
.showcase-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.showcase-row + .showcase-row{margin-top:72px}
.showcase-row.is-reverse .showcase-text{order:2}
.showcase-text h3{font-size:clamp(21px,2.4vw,28px);line-height:1.35}
.showcase-text > p{margin-top:14px;font-size:15.5px;color:var(--text-2)}
.showcase-figure{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);aspect-ratio:4/3;background:var(--bg-2);
}
.showcase-figure img{width:100%;height:100%;object-fit:cover}
.steps{margin-top:28px;display:flex;gap:0;position:relative}
.step{position:relative;flex:1;padding-right:18px}
.step::before{
  content:"";position:absolute;left:22px;right:0;top:11px;height:1px;background:var(--line);
}
.step:last-child::before{display:none}
.step-dot{
  position:relative;z-index:1;width:22px;height:22px;border-radius:50%;
  background:var(--primary);display:grid;place-items:center;
  font-size:11px;font-weight:700;color:#fff;font-family:var(--mono);
}
.step h4{margin-top:12px;font-size:15px;font-weight:600}
.step p{margin-top:6px;font-size:13.5px;color:var(--text-3);line-height:1.7}

/* ---------- Proof ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:32px;border-radius:var(--r-card);background:var(--surface);border:1px solid var(--line);
}
.stat-item span{display:block;font-size:13px;color:var(--text-3)}
.stat-item strong{
  display:block;margin-top:6px;font-family:var(--mono);font-weight:700;
  font-size:clamp(26px,3.4vw,40px);line-height:1.1;color:var(--text);
}
.stat-item strong i{font-style:normal;color:var(--secondary);font-size:.55em;margin-left:2px}
.logo-wall{margin-top:32px;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.logo-item{
  height:76px;border-radius:12px;border:1px dashed var(--line-strong);
  display:grid;place-items:center;font-size:14px;color:var(--text-3);
  background:rgba(255,255,255,.02);filter:grayscale(1);transition:all var(--t);
}
.logo-item:hover{filter:grayscale(0);color:var(--text-2);border-color:var(--primary);background:rgba(122,60,255,.08)}
.quote-grid{margin-top:32px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote-card{position:relative;padding:28px 24px 24px}
.quote-card::after{
  content:"“";position:absolute;right:20px;top:6px;font-size:64px;line-height:1;
  color:rgba(122,60,255,.22);font-family:Georgia,serif;
}
.quote-card p{font-size:14.5px;color:var(--text-2);line-height:1.8;margin:0}
.quote-user{margin-top:18px;display:flex;align-items:center;gap:12px}
.quote-avatar{
  width:38px;height:38px;border-radius:50%;background:var(--surface-2);
  border:1px solid var(--line-strong);display:grid;place-items:center;
  font-size:13px;color:var(--text-2);font-weight:600;
}
.quote-user b{display:block;font-size:14px;font-weight:600}
.quote-user span{display:block;font-size:12.5px;color:var(--text-3)}

/* ---------- Pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.price-card{position:relative;padding:30px 26px;display:flex;flex-direction:column}
.price-card.is-featured{
  grid-column:span 1;background:var(--surface-2);border-color:rgba(122,60,255,.45);
  transform:translateY(-12px);box-shadow:var(--shadow-lg);
}
.price-card.is-featured:hover{transform:translateY(-16px)}
.price-tag{
  position:absolute;right:16px;top:16px;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;color:#2A0E00;background:var(--accent);
}
.price-name{font-size:16px;font-weight:600}
.price-amount{margin-top:16px;display:flex;align-items:baseline;gap:6px}
.price-amount b{font-family:var(--mono);font-size:40px;font-weight:700;line-height:1;letter-spacing:-.02em}
.price-amount span{font-size:13px;color:var(--text-3)}
.price-desc{margin-top:12px;font-size:13.5px;color:var(--text-2);min-height:44px}
.price-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.price-list li{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2)}
.price-list svg{flex:0 0 auto;width:18px;height:18px;margin-top:4px;color:var(--secondary)}
.price-card .btn{margin-top:26px;width:100%}
.price-note{margin-top:22px;font-size:12.5px;color:var(--text-3);text-align:center}

/* ---------- News ---------- */
.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-card);
  overflow:hidden;transition:transform var(--t),border-color var(--t),box-shadow var(--t);
  box-shadow:var(--shadow);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-lg)}
.news-link{display:block;height:100%}
.news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2);border-bottom:1px solid var(--line)}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 300ms ease}
.news-card:hover .news-thumb img{transform:translateY(-4px) scale(1.03)}
.news-thumb .badge{position:absolute;left:14px;top:14px}
.news-body{padding:20px 22px 22px}
.news-title{
  font-size:16.5px;font-weight:600;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--t);
}
.news-card:hover .news-title{color:#A98BFF}
.news-desc{
  margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.75;min-height:48px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--text-3)}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.badge-cat{color:var(--secondary);border:1px solid rgba(22,224,192,.35);background:rgba(22,224,192,.1)}
.empty-state{
  grid-column:1/-1;padding:64px 24px;text-align:center;border:1px dashed var(--line-strong);
  border-radius:var(--r-card);background:rgba(255,255,255,.02);
}
.empty-state svg{width:48px;height:48px;color:var(--text-3);margin:0 auto}
.empty-state p{margin-top:16px;font-size:15px;color:var(--text-2)}
.empty-state .btn{margin-top:20px}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-layout .sec-head{margin-bottom:0}
.faq-list{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;background:transparent;border:0;cursor:pointer;
  text-align:left;font-size:16px;font-weight:600;color:var(--text);transition:color var(--t);
}
.faq-q:hover{color:#A98BFF}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;border:1px solid var(--line-strong);
  display:grid;place-items:center;transition:transform var(--t),border-color var(--t),background var(--t);
}
.faq-icon svg{width:13px;height:13px}
.faq-item.is-open .faq-icon{transform:rotate(180deg);border-color:var(--primary);background:rgba(122,60,255,.16)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease}
.faq-a p{padding:0 4px 22px;font-size:16px;line-height:1.85;color:var(--text-2);max-width:820px}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
}
.cta-band::after{
  content:"";position:absolute;right:-160px;top:-140px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(122,60,255,.2) 0%,rgba(122,60,255,0) 70%);
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:36px;padding:72px 0;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(22px,2.8vw,32px);line-height:1.3}
.cta-inner p{margin-top:12px;font-size:15.5px;color:var(--text-2);max-width:620px}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg);padding:72px 0 0;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:2.2fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin-top:18px;font-size:14px;color:var(--text-2);line-height:1.85;max-width:330px}
.footer-contact{margin-top:20px;display:flex;flex-direction:column;gap:8px;font-size:13.5px;color:var(--text-3)}
.footer-contact span b{color:var(--text-2);font-weight:600}
.footer-col h4{font-size:14px;color:var(--primary);font-weight:600;letter-spacing:.02em}
.footer-col ul{margin-top:18px;display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:var(--text-2);transition:color var(--t),transform var(--t);display:inline-block}
.footer-col a:hover{color:var(--text);transform:translateX(2px)}
.footer-bottom{
  margin-top:56px;padding:22px 0;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- Float CTA & back to top ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:90;
  display:flex;align-items:center;gap:10px;height:48px;padding:0 8px 0 18px;
  border-radius:var(--r-pill);background:var(--surface);border:1px solid var(--line-strong);
  box-shadow:var(--shadow-lg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity 300ms ease,transform 300ms ease,visibility 300ms;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta .btn{height:36px;padding:0 18px;font-size:14px}
.float-cta .close-btn{
  width:30px;height:30px;border-radius:50%;border:1px solid var(--line);
  background:transparent;cursor:pointer;display:grid;place-items:center;color:var(--text-3);
}
.float-cta .close-btn:hover{color:var(--text);border-color:var(--line-strong)}
.back-top{
  position:fixed;right:28px;bottom:92px;z-index:89;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line-strong);background:var(--surface);color:var(--text-2);
  display:grid;place-items:center;cursor:pointer;opacity:0;visibility:hidden;
  transition:opacity 260ms ease,visibility 260ms,color var(--t),border-color var(--t);
}
.back-top.is-visible{opacity:1;visibility:visible}
.back-top:hover{color:var(--text);border-color:var(--primary)}
.back-top svg{width:16px;height:16px}

/* ---------- Drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,4,14,.6);z-index:110;
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:120;
  background:var(--bg-2);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform 280ms ease;
  padding:24px 22px 32px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{padding:13px 12px;border-radius:10px;font-size:15px;color:var(--text-2);border:1px solid transparent}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--text);border-color:var(--line);background:rgba(122,60,255,.1)}
.drawer .btn{margin-top:24px;width:100%}
body.no-scroll{overflow:hidden}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .nav-menu{gap:0}
  .nav-menu a{padding:8px 9px;font-size:14px}
  .bento .b-lg{grid-column:span 12}
  .bento .b-md{grid-column:span 6}
  .bento .b-sm{grid-column:span 6}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .nav-right .btn-primary{display:none}
  .nav-toggle{display:block}
  .hero{padding:112px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-figure{aspect-ratio:16/9;max-height:46vh}
  .hero-figure img{max-height:46vh}
  .hero-float{left:auto;right:12px;bottom:-22px;width:206px}
  .section{padding:72px 0}
  .showcase-row{grid-template-columns:1fr;gap:32px}
  .showcase-row.is-reverse .showcase-text{order:0}
  .stat-strip{grid-template-columns:repeat(2,1fr)}
  .logo-wall{grid-template-columns:repeat(2,1fr)}
  .quote-grid{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr}
  .price-card.is-featured{transform:none}
  .price-card.is-featured:hover{transform:translateY(-4px)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .cta-inner{padding:60px 0}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .hero{padding:96px 0 56px}
  .hero-actions .btn{flex:1 1 auto}
  .bento{gap:16px}
  .bento .b-md,.bento .b-sm{grid-column:span 12}
  .news-grid{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr 1fr;padding:24px;gap:18px}
  .steps{flex-direction:column;gap:20px}
  .step{padding-right:0}
  .step::before{left:11px;right:auto;top:26px;bottom:-20px;width:1px;height:auto}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .float-cta{
    left:0;right:0;bottom:0;height:56px;border-radius:0;padding:0 12px 0 18px;
    justify-content:space-between;gap:12px;
    padding-bottom:env(safe-area-inset-bottom);
  }
  .float-cta .float-text{font-size:13.5px;color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .back-top{bottom:76px;right:16px}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:22px}
}
@media (max-width:479px){
  .logo-text{font-size:14.5px}
  .hero h1{font-size:27px}
  .price-grid{gap:18px}
  .stat-item strong{font-size:26px}
}

/* roulang page: category1 */
:root{
  --bg:#0C0A14;
  --bg-2:#131024;
  --surface:#181430;
  --surface-2:#211B3D;
  --primary:#7A3CFF;
  --primary-600:#6728F0;
  --secondary:#16E0C0;
  --accent:#FF6B4A;
  --text:#F4F2FF;
  --text-2:#B6AFD4;
  --text-3:#7C7699;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-card:0 12px 32px rgba(9,6,22,.55);
  --shadow-lift:0 18px 40px rgba(9,6,22,.7);
  --ease:220ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.6vw,52px);font-weight:800;line-height:1.18;letter-spacing:-.02em}
h2{font-size:clamp(24px,3.2vw,36px)}
h3{font-size:22px;font-weight:600}
h4{font-size:18px;font-weight:600}
p{margin:0 0 1.2em}
p:last-child{margin-bottom:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
::selection{background:rgba(122,60,255,.4);color:#fff}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--primary);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(12,10,20,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background var(--ease),border-color var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--line);background:rgba(12,10,20,.88)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;transition:height var(--ease)}
.site-header.is-stuck .header-inner{height:56px}
.header-left{display:flex;align-items:center;gap:28px;min-width:0}
.header-right{display:flex;align-items:center;gap:10px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:34px;height:34px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,#8B5CFF,#6728F0);
  box-shadow:0 8px 18px rgba(103,40,240,.35);
}
.logo-mark svg{width:19px;height:19px}
.logo-text{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:2px}
.nav-menu a{
  position:relative;display:inline-block;padding:8px 12px;border-radius:8px;
  font-size:14.5px;color:var(--text-2);
  transition:color 180ms ease,background 180ms ease;
}
.nav-menu a:hover{color:var(--text);background:rgba(122,60,255,.12)}
.nav-menu a.is-active{color:var(--text)}
.nav-menu a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);
}
.icon-btn{
  width:40px;height:40px;border-radius:var(--radius-btn);display:grid;place-items:center;
  border:1px solid var(--line);color:var(--text-2);
  transition:color 180ms ease,border-color 180ms ease,background 180ms ease;
}
.icon-btn:hover{color:var(--text);border-color:var(--primary);background:rgba(122,60,255,.12)}
.icon-btn svg{width:19px;height:19px}
.link-plain{font-size:14.5px;color:var(--text-2);padding:8px 10px;border-radius:8px;transition:color 180ms ease}
.link-plain:hover{color:var(--text)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;white-space:nowrap;cursor:pointer;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease),filter var(--ease);
}
.btn-primary{
  color:#F4F2FF;
  background:linear-gradient(135deg,#8B5CFF,#6728F0);
  box-shadow:0 10px 24px rgba(103,40,240,.35);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 14px 28px rgba(103,40,240,.45)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:transparent;border:1px solid var(--line-strong);color:var(--text)}
.btn-secondary:hover{border-color:var(--primary);background:rgba(122,60,255,.12)}
.btn-secondary:active{transform:translateY(1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.hamburger{display:none;width:40px;height:40px;border-radius:var(--radius-btn);border:1px solid var(--line);place-items:center;color:var(--text-2)}
.hamburger:hover{border-color:var(--primary);color:var(--text)}
.hamburger svg{width:20px;height:20px}
.search-bar{
  max-height:0;overflow:hidden;background:rgba(12,10,20,.92);
  border-top:1px solid transparent;transition:max-height var(--ease),border-color var(--ease);
}
.search-bar.is-open{max-height:90px;border-top-color:var(--line)}
.search-bar .container{display:flex;gap:12px;padding-top:14px;padding-bottom:14px}
.search-bar input{
  flex:1;height:46px;padding:0 16px;border-radius:var(--radius-btn);
  background:var(--bg-2);border:1px solid var(--line);color:var(--text);font-size:15px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.search-bar input::placeholder{color:var(--text-3)}
.search-bar input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(122,60,255,.22)}

/* ---------- Drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,4,14,.6);z-index:110;
  opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;z-index:120;
  background:var(--bg-2);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform 240ms ease;
  padding:22px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer nav{display:grid;gap:4px;margin-bottom:22px}
.drawer nav a{
  padding:13px 14px;border-radius:var(--radius-btn);font-size:15px;color:var(--text-2);
  border:1px solid transparent;transition:all 180ms ease;
}
.drawer nav a:hover{color:var(--text);background:rgba(122,60,255,.12);border-color:var(--line)}
.drawer nav a.is-active{color:var(--text);border-color:rgba(122,60,255,.45);background:rgba(122,60,255,.12)}
.drawer .search-bar{max-height:none;border:0;background:none}
.drawer .search-bar .container{padding:0;flex-direction:column}
.drawer .search-bar .btn{width:100%}

/* ---------- Page hero ---------- */
.page-hero{
  position:relative;padding:154px 0 76px;overflow:hidden;
  background-image:linear-gradient(180deg,rgba(12,10,20,.74),rgba(12,10,20,.94)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 20% 10%,#000,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 20% 10%,#000,transparent 72%);
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-3);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-3);transition:color 180ms ease}
.breadcrumb a:hover{color:var(--text-2)}
.breadcrumb .sep{color:var(--line-strong)}
.page-hero h1{max-width:900px}
.page-hero h1 em{font-style:normal;color:var(--secondary)}
.hero-sub{margin-top:18px;max-width:780px;font-size:17px;color:var(--text-2)}
.hero-chips{display:flex;gap:10px;margin-top:30px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
.hero-chips::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;padding:8px 16px;border-radius:999px;font-size:13.5px;color:var(--text-2);
  border:1px solid var(--line-strong);background:rgba(24,20,48,.62);
  transition:color 180ms ease,border-color 180ms ease,background 180ms ease;
}
.chip:hover{color:var(--text);border-color:var(--primary);background:rgba(122,60,255,.14)}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:780px;margin-bottom:52px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  font-size:12.5px;letter-spacing:.06em;color:var(--secondary);
  border:1px solid rgba(22,224,192,.32);background:rgba(22,224,192,.08);margin-bottom:18px;
}
.section-head p{margin-top:16px;color:var(--text-2);font-size:16.5px}

/* ---------- Split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split-text h2{margin-bottom:18px}
.split-text>p{color:var(--text-2);font-size:16.5px}
.media-frame{
  position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);
  background:var(--surface);box-shadow:var(--shadow-card);aspect-ratio:16/9;
}
.media-frame img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease}
.media-frame:hover img{transform:scale(1.03)}
.media-frame .frame-tag{
  position:absolute;left:16px;bottom:16px;padding:7px 14px;border-radius:999px;
  font-size:12.5px;color:var(--text);background:rgba(12,10,20,.74);border:1px solid var(--line-strong);
  backdrop-filter:blur(6px);
}

/* ---------- Steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:36px;position:relative}
.steps::before{content:"";position:absolute;top:15px;left:6px;right:6px;height:1px;background:var(--line)}
.step{position:relative;padding-top:46px}
.step-num{
  position:absolute;top:2px;left:0;width:28px;height:28px;border-radius:999px;
  display:grid;place-items:center;font-size:13px;font-weight:700;color:#fff;
  background:var(--primary);box-shadow:0 0 0 6px rgba(122,60,255,.16);
}
.step h4{margin-bottom:8px}
.step p{color:var(--text-2);font-size:15px;margin:0}

/* ---------- Feature list ---------- */
.check-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px 24px}
.check-item{
  display:flex;gap:14px;padding:22px;border-radius:var(--radius-card);
  background:var(--surface);border:1px solid var(--line);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.check-item:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-card)}
.check-icon{
  flex:0 0 auto;width:24px;height:24px;margin-top:4px;border-radius:999px;
  display:grid;place-items:center;font-size:12px;font-weight:700;
  color:var(--secondary);border:1px solid rgba(22,224,192,.45);background:rgba(22,224,192,.08);
}
.check-item h4{font-size:16.5px;margin-bottom:6px}
.check-item p{margin:0;font-size:14.8px;color:var(--text-2)}

/* ---------- Cards ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:24px;
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-card)}
.cat-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
.cat-thumb{aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line);background:var(--surface-2)}
.cat-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease}
.cat-card:hover .cat-thumb img{transform:scale(1.05)}
.cat-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.cat-body h3{font-size:18.5px}
.cat-body h3 a{transition:color 180ms ease}
.cat-card:hover .cat-body h3 a{color:var(--primary)}
.cat-body p{margin:0;font-size:14.8px;color:var(--text-2)}
.badge{
  display:inline-flex;align-items:center;align-self:flex-start;padding:4px 12px;border-radius:999px;
  font-size:12.5px;letter-spacing:.04em;color:var(--secondary);
  border:1px solid rgba(22,224,192,.4);background:rgba(22,224,192,.08);
}
.badge-accent{color:var(--accent);border-color:rgba(255,107,74,.42);background:rgba(255,107,74,.1)}
.badge-plain{color:var(--text-3);border-color:var(--line-strong);background:transparent}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;padding:76px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background-image:linear-gradient(rgba(12,10,20,.86),rgba(12,10,20,.9)),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{margin-bottom:12px}
.cta-inner p{margin:0;color:var(--text-2);max-width:640px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Footer ---------- */
.site-footer{background:var(--bg-2);border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:68px 0 44px}
.footer-brand .logo{margin-bottom:18px}
.footer-brand p{font-size:14.6px;color:var(--text-2);max-width:340px;margin-bottom:18px}
.footer-contact{display:grid;gap:6px;font-size:13.5px;color:var(--text-3)}
.footer-contact b{color:var(--text-2);font-weight:600}
.footer-col h4{font-size:14px;color:var(--primary);margin-bottom:16px;letter-spacing:.02em}
.footer-col li a{
  display:inline-block;padding:5px 0;font-size:14px;color:var(--text-2);
  transition:color 180ms ease,transform 180ms ease;
}
.footer-col li a:hover{color:var(--text);transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 0 34px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);
}

/* ---------- Float CTA & to-top ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:80;
  display:flex;align-items:center;gap:10px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity 300ms ease,transform 300ms ease,visibility 300ms ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta .btn{
  height:48px;padding:0 22px;border-radius:999px;
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
.float-close{
  width:28px;height:28px;border-radius:999px;display:grid;place-items:center;
  border:1px solid var(--line-strong);background:rgba(19,16,36,.86);color:var(--text-3);
  transition:color 180ms ease,border-color 180ms ease,background 180ms ease;
}
.float-close:hover{color:var(--text);border-color:var(--primary)}
.to-top{
  position:fixed;right:28px;bottom:92px;width:40px;height:40px;border-radius:999px;
  display:grid;place-items:center;z-index:79;
  border:1px solid var(--line-strong);background:rgba(19,16,36,.9);color:var(--text-2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--ease),transform var(--ease),visibility var(--ease),color 180ms ease,border-color 180ms ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--text);border-color:var(--primary);background:rgba(122,60,255,.16)}
.to-top svg{width:18px;height:18px}

/* ---------- Responsive ---------- */
@media (max-width:1199px){
  .header-left{gap:18px}
  .nav-menu a{padding:8px 9px;font-size:14px}
  .split{gap:44px}
}
@media (max-width:1024px){
  .nav-menu{display:none}
  .hamburger{display:grid}
  .link-plain{display:none}
  .split{grid-template-columns:1fr;gap:36px}
  .split-reverse .split-media{order:0}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .page-hero{padding:132px 0 64px}
  .section{padding:72px 0}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .page-hero{padding:118px 0 56px}
  .hero-sub{font-size:16px}
  .section{padding:56px 0}
  .section-head{margin-bottom:36px}
  .check-list{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:22px}
  .steps::before{display:none}
  .grid-4,.grid-3{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:48px 0 32px}
  .float-cta .btn{height:44px;padding:0 18px;font-size:14px}
}
@media (max-width:520px){
  h1{font-size:28px}
  .section{padding:48px 0}
  .header-right .btn-sm{padding:0 14px}
  .float-cta{
    left:0;right:0;bottom:0;gap:10px;padding:8px 16px calc(8px + env(safe-area-inset-bottom));
    background:rgba(19,16,36,.94);border-top:1px solid var(--line);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  }
  .float-cta .btn{flex:1;height:44px;border-radius:10px}
  .float-close{width:32px;height:32px;flex:0 0 auto}
  .to-top{right:16px;bottom:80px}
  .steps{grid-template-columns:1fr}
}

/* roulang page: article */
:root{
  --bg:#0C0A14;
  --bg-2:#131024;
  --surface:#181430;
  --surface-2:#211B3D;
  --primary:#7A3CFF;
  --primary-600:#6728F0;
  --secondary:#16E0C0;
  --accent:#FF6B4A;
  --text:#F4F2FF;
  --text-2:#B6AFD4;
  --text-3:#7C7699;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius:14px;
  --radius-sm:10px;
  --radius-lg:18px;
  --shadow:0 12px 32px rgba(9,6,22,.55);
  --shadow-lg:0 18px 46px rgba(9,6,22,.72);
  --container:1240px;
  --gap:24px;
  --t:220ms ease;
  --t-fast:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--text);text-decoration:none}
a:hover{color:var(--primary)}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5{margin:0;font-weight:700;line-height:1.28;letter-spacing:-0.01em}
h1{font-size:clamp(30px,4.4vw,48px);font-weight:800;line-height:1.18;letter-spacing:-0.02em}
h2{font-size:clamp(24px,3.2vw,34px);line-height:1.25}
h3{font-size:22px;font-weight:600}
h4{font-size:18px;font-weight:600}
p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px}
::selection{background:rgba(122,60,255,.35);color:#fff}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-head p{color:var(--text-2);margin-top:14px;font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(122,60,255,.12);
  border:1px solid rgba(122,60,255,.4);
  color:var(--text-2);font-size:12.5px;letter-spacing:.06em;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--secondary)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform var(--t-fast),box-shadow var(--t-fast),background var(--t-fast),border-color var(--t-fast),color var(--t-fast);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#8B5CFF 0%,#6728F0 100%);
  color:#F4F2FF;box-shadow:0 10px 26px rgba(103,40,240,.34);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);color:#fff;box-shadow:0 14px 30px rgba(103,40,240,.44)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{
  background:transparent;border:1px solid var(--line-strong);color:var(--text);
}
.btn-secondary:hover{border-color:var(--primary);background:rgba(122,60,255,.12);color:var(--text);transform:translateY(-1px)}
.btn-ghost{
  height:auto;padding:0;color:var(--text-2);border-radius:0;
  box-shadow:inset 0 -2px 0 0 var(--primary);padding-bottom:3px;
}
.btn-ghost:hover{color:var(--text)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:9px}
.icon-btn{
  width:40px;height:40px;display:inline-grid;place-items:center;
  border:1px solid var(--line);border-radius:10px;color:var(--text-2);
  transition:border-color var(--t-fast),color var(--t-fast),background var(--t-fast);
}
.icon-btn:hover{border-color:var(--primary);color:var(--text);background:rgba(122,60,255,.12)}
.icon-btn svg{width:19px;height:19px}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12.5px;line-height:1.6;
  border:1px solid rgba(22,224,192,.45);color:#8FF0E1;background:rgba(22,224,192,.08);
}
.badge-accent{border-color:rgba(255,107,74,.5);color:#FFB3A0;background:rgba(255,107,74,.1)}
.badge-plain{border-color:var(--line-strong);color:var(--text-3);background:transparent}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 14px;border-radius:999px;
  border:1px solid var(--line);background:var(--bg-2);color:var(--text-2);
  font-size:13.5px;transition:all var(--t-fast);
}
.chip:hover{border-color:var(--primary);color:var(--text);background:rgba(122,60,255,.12)}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(12,10,20,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:height var(--t),background var(--t);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;transition:height var(--t)}
.site-header.is-compact .header-inner{height:56px}
.header-left{display:flex;align-items:center;gap:28px;min-width:0}
.header-right{display:flex;align-items:center;gap:12px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);flex:none}
.logo:hover{color:var(--text)}
.logo-mark{
  width:34px;height:34px;display:grid;place-items:center;flex:none;
  background:linear-gradient(135deg,#8B5CFF,#6728F0);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%);
  border-radius:9px;
}
.logo-mark svg{width:18px;height:18px}
.logo-text{font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-menu a{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 12px;
  font-size:14.5px;color:var(--text-2);border-radius:8px;transition:color var(--t-fast),background var(--t-fast);
}
.nav-menu a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-menu a.is-active{color:var(--text)}
.nav-menu a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--primary);
}
.header-link{font-size:14.5px;color:var(--text-2);transition:color var(--t-fast)}
.header-link:hover{color:var(--text)}
.hamburger{display:none;width:44px;height:44px;place-items:center;border:1px solid var(--line);border-radius:10px;color:var(--text)}
.hamburger svg{width:20px;height:20px}

.search-bar{border-top:1px solid var(--line);background:rgba(12,10,20,.96);max-height:0;overflow:hidden;transition:max-height var(--t)}
.search-bar.is-open{max-height:88px}
.search-form{display:flex;align-items:center;gap:12px;padding:14px 0}
.search-form svg{width:20px;height:20px;color:var(--text-3);flex:none}
.search-form input{
  flex:1;height:46px;padding:0 16px;border-radius:var(--radius-sm);
  background:var(--bg-2);border:1px solid var(--line);color:var(--text);
  transition:border-color var(--t-fast),box-shadow var(--t-fast);
}
.search-form input::placeholder{color:var(--text-3)}
.search-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(122,60,255,.35)}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,4,14,.6);z-index:80;
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;z-index:90;
  background:var(--bg-2);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform var(--t);
  padding:22px 20px 32px;overflow-y:auto;
  display:flex;flex-direction:column;gap:18px;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-nav{display:flex;flex-direction:column;gap:2px}
.drawer-nav a{padding:13px 10px;border-radius:10px;color:var(--text-2);font-size:15.5px;border:1px solid transparent}
.drawer-nav a:hover{background:rgba(122,60,255,.1);border-color:var(--line);color:var(--text)}
.drawer-actions{display:flex;flex-direction:column;gap:12px;margin-top:auto}

/* 面包屑 */
.breadcrumb{padding:28px 0 0;font-size:14px;color:var(--text-3)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:flex;align-items:center;gap:8px;min-width:0}
.breadcrumb li+li::before{content:"/";color:var(--text-3)}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .crumb-current{color:var(--text-2);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 文章布局 */
.article-wrap{padding:26px 0 96px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:48px;align-items:start}
.article-main{min-width:0;max-width:820px}
.article-header{padding-bottom:26px;border-bottom:1px solid var(--line)}
.article-header .badge{margin-bottom:16px}
.article-header h1{margin-bottom:18px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13.5px;color:var(--text-3)}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--line-strong)}
.meta-row .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
.article-head-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:22px;flex-wrap:wrap}
.share-group{display:flex;align-items:center;gap:10px}
.share-group span{font-size:13px;color:var(--text-3)}
.share-btn{
  width:40px;height:40px;display:grid;place-items:center;border-radius:50%;
  border:1px solid var(--line);color:var(--text-2);
  transition:border-color var(--t-fast),color var(--t-fast),background var(--t-fast),transform var(--t-fast);
}
.share-btn:hover{border-color:var(--primary);color:var(--text);background:rgba(122,60,255,.12);transform:translateY(-2px)}
.share-btn svg{width:18px;height:18px}

.cover-figure{margin:32px 0 0}
.cover-figure .cover-box{
  position:relative;width:100%;aspect-ratio:16/9;border-radius:16px;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);
}
.cover-figure img{width:100%;height:100%;object-fit:cover}
.cover-figure figcaption{margin-top:12px;text-align:center;font-size:12.5px;color:var(--text-3)}

/* 正文排版 */
.article-body{
  max-width:800px;margin:40px auto 0;
  font-size:17px;line-height:1.9;color:#E7E3F7;
}
.article-body>*+*{margin-top:1.4em}
.article-body p{color:#DED9F2}
.article-body h2{
  position:relative;margin-top:48px;padding-left:16px;
  font-size:clamp(21px,2.4vw,26px);color:var(--text);line-height:1.4;
}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;border-radius:3px;background:var(--primary)}
.article-body h3{margin-top:32px;font-size:19.5px;color:var(--text)}
.article-body h4{margin-top:24px;font-size:17px;color:var(--text-2)}
.article-body ul,.article-body ol{padding-left:0}
.article-body li{position:relative;padding-left:24px;margin-top:10px;color:#DED9F2}
.article-body ul>li::before{
  content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;border-radius:2px;background:var(--primary);
}
.article-body ol{counter-reset:bodyli}
.article-body ol>li{counter-increment:bodyli}
.article-body ol>li::before{
  content:counter(bodyli);position:absolute;left:0;top:.05em;
  width:20px;height:20px;border-radius:6px;background:rgba(122,60,255,.18);
  color:#C6B4FF;font-size:12.5px;line-height:20px;text-align:center;font-weight:600;
}
.article-body blockquote{
  margin:28px 0;padding:20px 22px;border-left:3px solid var(--primary);
  background:var(--surface);border-radius:0 var(--radius) var(--radius) 0;color:var(--text-2);
}
.article-body blockquote p{color:var(--text-2)}
.article-body a{color:#B79BFF;text-decoration:underline;text-underline-offset:3px;text-decoration-color:rgba(122,60,255,.6)}
.article-body a:hover{color:#fff}
.article-body img{border-radius:12px;margin:26px 0 8px;border:1px solid var(--line)}
.article-body figure{margin:26px 0}
.article-body figcaption{margin-top:10px;text-align:center;font-size:12.5px;color:var(--text-3)}
.article-body table{
  width:100%;border-collapse:collapse;margin:26px 0;display:block;overflow-x:auto;
  border:1px solid var(--line);border-radius:var(--radius);font-size:15px;
}
.article-body thead{background:var(--surface-2)}
.article-body th,.article-body td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
.article-body tbody tr:last-child td{border-bottom:0}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.article-body code{
  padding:2px 6px;border-radius:6px;background:var(--surface-2);color:#9FF0E2;font-size:.9em;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* 空态 */
.empty-state{
  padding:64px 24px;text-align:center;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);margin:40px 0 0;
}
.empty-state svg{width:48px;height:48px;color:var(--text-3);margin:0 auto 16px}
.empty-state p{color:var(--text-2);margin-bottom:20px}

/* 侧栏 */
.article-side{display:flex;flex-direction:column;gap:22px;position:sticky;top:96px}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);
}
.side-card h3{font-size:16px;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--primary)}
.side-list li+li{border-top:1px solid var(--line)}
.side-list a{display:block;padding:11px 0;font-size:14.5px;color:var(--text-2);transition:color var(--t-fast),padding-left var(--t-fast)}
.side-list a:hover{color:var(--text);padding-left:4px}
.side-card .cvb{
  background:linear-gradient(150deg,rgba(122,60,255,.22),rgba(22,224,192,.08));
  border-color:rgba(122,60,255,.34);
}
.side-card .cvb p{font-size:14px;color:var(--text-2);margin:10px 0 18px}

/* 文末 */
.article-foot{max-width:820px;margin-top:56px}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding-top:26px;border-top:1px solid var(--line)}
.tag-row .tag-label{font-size:13px;color:var(--text-3);margin-right:4px}
.nextprev{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px}
.np-card{
  display:flex;flex-direction:column;gap:8px;padding:20px;border-radius:var(--radius);
  background:var(--surface);border:1px solid var(--line);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.np-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-lg);color:var(--text)}
.np-card .np-dir{font-size:12.5px;color:var(--text-3);display:flex;align-items:center;gap:6px}
.np-card strong{font-size:15.5px;font-weight:600;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.np-card.is-next{text-align:right}
.np-card.is-next .np-dir{justify-content:flex-end}

.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:26px}
.card{
  position:relative;display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 14px),calc(100% - 14px) 100%,0 100%);
  transition:transform var(--t),border-color var(--t),box-shadow var(--t);
}
.card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-lg)}
.card-media{position:relative;aspect-ratio:16/9;background:var(--surface-2);border-bottom:1px solid var(--line);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform var(--t)}
.card:hover .card-media img{transform:translateY(-4px) scale(1.03)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:16.5px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-body p{font-size:14px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);margin-top:auto}
.card-meta .num{font-variant-numeric:tabular-nums}

.back-row{margin-top:34px;display:flex;justify-content:center}

/* 底部 CTA 带 */
.cta-band{
  position:relative;overflow:hidden;background:var(--bg-2);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:64px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  opacity:.22;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(12,10,20,.92) 0%,rgba(12,10,20,.72) 60%,rgba(12,10,20,.92) 100%);
}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(22px,2.8vw,30px)}
.cta-inner p{color:var(--text-2);margin-top:12px;max-width:620px;font-size:15.5px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 页脚 */
.site-footer{background:var(--bg);border-top:1px solid var(--line);padding:72px 0 32px;position:relative}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.04;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:48px 48px;
}
.footer-grid{position:relative;display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{margin-bottom:18px}
.footer-brand p{font-size:14px;color:var(--text-2);max-width:360px}
.footer-contact{margin-top:18px;display:flex;flex-direction:column;gap:8px;font-size:13.5px;color:var(--text-3)}
.footer-contact b{color:var(--text-2);font-weight:600}
.footer-col h4{font-size:14px;color:#A98CFF;margin-bottom:16px;letter-spacing:.02em}
.footer-col li+li{margin-top:10px}
.footer-col a{font-size:14px;color:var(--text-2);transition:color var(--t-fast),transform var(--t-fast);display:inline-block}
.footer-col a:hover{color:var(--text);transform:translateX(2px)}
.footer-bottom{
  position:relative;margin-top:46px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* 悬浮 CTA 与回到顶部 */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:flex;align-items:center;gap:12px;
  height:48px;padding:0 12px 0 18px;max-width:220px;
  border-radius:999px;border:1px solid var(--line-strong);
  background:rgba(24,20,48,.86);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity 300ms ease,transform 300ms ease,visibility 300ms ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta.is-hidden{display:none}
.float-cta-text{font-size:13.5px;color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.float-cta .btn-sm{height:34px;padding:0 14px;font-size:13.5px}
.float-cta-close{
  width:26px;height:26px;display:grid;place-items:center;border-radius:50%;
  color:var(--text-3);border:1px solid transparent;flex:none;
}
.float-cta-close:hover{color:var(--text);border-color:var(--line-strong)}
.float-cta-close svg{width:13px;height:13px}
.back-to-top{
  position:fixed;right:28px;bottom:88px;z-index:70;
  width:40px;height:40px;display:grid;place-items:center;border-radius:50%;
  border:1px solid var(--line);background:var(--bg-2);color:var(--text-2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--t),transform var(--t),visibility var(--t),border-color var(--t),color var(--t);
}
.back-to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{border-color:var(--primary);color:var(--text)}
.back-to-top svg{width:18px;height:18px}

/* 响应式 */
@media (max-width:1199px){
  .article-layout{grid-template-columns:1fr;gap:40px}
  .article-side{position:static;top:auto}
  .article-main{max-width:none}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .nav-menu a{padding:0 9px;font-size:14px}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .hamburger{display:grid}
  .header-link{display:none}
  .section{padding:72px 0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  body{padding-bottom:64px}
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .header-inner{height:60px}
  .logo-text{font-size:15px}
  .search-bar.is-open{max-height:100px}
  .search-form input{min-width:0}
  .article-wrap{padding:18px 0 64px}
  .article-body{font-size:16.5px;margin-top:32px}
  .article-body table{font-size:14px}
  .nextprev{grid-template-columns:1fr}
  .np-card.is-next{text-align:left}
  .np-card.is-next .np-dir{justify-content:flex-start}
  .rel-grid{grid-template-columns:1fr}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .site-footer{padding:56px 0 96px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .float-cta{
    right:0;left:0;bottom:0;max-width:none;width:100%;
    height:auto;min-height:56px;padding:8px 16px calc(8px + env(safe-area-inset-bottom));
    border-radius:0;border-left:0;border-right:0;border-bottom:0;
    justify-content:space-between;
  }
  .float-cta.is-visible{transform:translateY(0)}
  .back-to-top{right:16px;bottom:76px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  h1{font-size:26px}
  .btn{width:100%;padding:0 20px}
  .btn-sm{width:auto}
  .cta-actions{flex-direction:column}
  .meta-row{font-size:13px}
  .footer-contact{font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category2 */
:root{
  --bg:#0C0A14;
  --bg-2:#131024;
  --surface:#181430;
  --surface-2:#211B3D;
  --primary:#7A3CFF;
  --primary-600:#6728F0;
  --secondary:#16E0C0;
  --accent:#FF6B4A;
  --text:#F4F2FF;
  --text-2:#B6AFD4;
  --text-3:#7C7699;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 12px 32px rgba(9,6,22,.55);
  --shadow-deep:0 18px 44px rgba(9,6,22,.72);
  --ease:220ms ease;
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1{font-size:clamp(30px,4.6vw,52px);font-weight:800;letter-spacing:-.02em;line-height:1.18}
h2{font-size:clamp(24px,3.2vw,36px);font-weight:700;line-height:1.25}
h3{font-size:22px;font-weight:600;line-height:1.4}
h4{font-size:18px;font-weight:600;line-height:1.5}
p{color:var(--text-2)}
::selection{background:rgba(122,60,255,.4);color:#fff}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-head p{margin-top:14px;font-size:17px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(122,60,255,.12);
  border:1px solid rgba(122,60,255,.4);
  font-size:12.5px;letter-spacing:.06em;color:var(--text);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--secondary)}
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#8B5CFF,#6728F0);
  color:#F4F2FF;box-shadow:0 8px 22px rgba(103,40,240,.35);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 12px 28px rgba(103,40,240,.45)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:transparent;border-color:var(--line-strong);color:var(--text)}
.btn-outline:hover{border-color:var(--primary);background:rgba(122,60,255,.12);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--primary);padding:0;height:auto;border:0;position:relative}
.btn-ghost::after{content:"";position:absolute;left:0;bottom:-4px;height:2px;width:100%;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--ease)}
.btn-ghost:hover::after{transform:scaleX(1)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed}
.icon-btn{
  width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--radius-sm);border:1px solid var(--line-strong);background:transparent;
  color:var(--text-2);cursor:pointer;transition:all var(--ease);
}
.icon-btn:hover{border-color:var(--primary);color:var(--text);background:rgba(122,60,255,.12)}
.icon-btn svg{width:20px;height:20px}
svg.stroke{fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}

/* 徽章与 chips */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;font-size:12.5px;line-height:1.6;
  border:1px solid rgba(22,224,192,.45);color:var(--secondary);background:rgba(22,224,192,.08);
}
.badge-accent{border-color:rgba(255,107,74,.5);color:var(--accent);background:rgba(255,107,74,.1)}
.badge-muted{border-color:var(--line-strong);color:var(--text-3);background:rgba(255,255,255,.03)}
.chip-row{display:flex;gap:10px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
.chip-row::-webkit-scrollbar{display:none}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:999px;font-size:14px;
  border:1px solid var(--line-strong);color:var(--text-2);
  background:rgba(255,255,255,.02);cursor:pointer;white-space:nowrap;
  transition:all var(--ease);
}
.chip:hover{color:var(--text);border-color:var(--primary);background:rgba(122,60,255,.12)}
.chip.is-active{color:var(--text);border-color:var(--primary);background:rgba(122,60,255,.18)}

/* 顶部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(12,10,20,.72);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background var(--ease),border-color var(--ease);
}
.site-header.is-scrolled{background:rgba(12,10,20,.92);border-color:var(--line-strong)}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;transition:height var(--ease)}
.site-header.is-scrolled .header-inner{height:56px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;display:grid;place-items:center;flex-shrink:0;
  background:linear-gradient(135deg,#8B5CFF,#6728F0);
  clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,9px 100%,0 calc(100% - 9px));
}
.logo-mark svg{width:18px;height:18px}
.logo-text{font-size:15px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:2px;margin-left:8px;flex:1}
.nav-menu a{
  position:relative;padding:8px 11px;border-radius:8px;
  font-size:14px;color:var(--text-2);transition:color var(--ease),background var(--ease);
}
.nav-menu a:hover{color:var(--text);background:rgba(122,60,255,.1)}
.nav-menu a.is-active{color:var(--text)}
.nav-menu a.is-active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:1px;height:2px;background:var(--primary);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.header-link{font-size:14px;color:var(--text-2);transition:color var(--ease)}
.header-link:hover{color:var(--text)}
.burger{display:none}
.search-bar{max-height:0;overflow:hidden;border-top:1px solid transparent;transition:max-height var(--ease),border-color var(--ease)}
.search-bar.is-open{max-height:96px;border-color:var(--line)}
.search-bar form{display:flex;gap:12px;padding:18px 0}
.search-bar input{
  flex:1;height:46px;padding:0 16px;border-radius:var(--radius-sm);
  background:var(--bg-2);border:1px solid var(--line);color:var(--text);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.search-bar input::placeholder{color:var(--text-3)}
.search-bar input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(122,60,255,.25)}

/* 抽屉 */
.drawer-mask{position:fixed;inset:0;background:rgba(6,4,14,.6);opacity:0;visibility:hidden;transition:opacity var(--ease);z-index:70}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:80;
  background:var(--bg-2);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform 240ms ease;
  padding:22px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:22px}
.drawer-nav a{padding:13px 14px;border-radius:var(--radius-sm);font-size:15px;color:var(--text-2);border:1px solid transparent;transition:all var(--ease)}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--text);border-color:rgba(122,60,255,.45);background:rgba(122,60,255,.12)}
.drawer .btn{width:100%}

/* 页头 */
.page-hero{
  position:relative;padding:104px 0 64px;
  background-image:linear-gradient(180deg,rgba(12,10,20,.78),rgba(12,10,20,.95)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;opacity:.5;
}
.page-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-3);margin-bottom:20px}
.crumb a{color:var(--text-3);transition:color var(--ease)}
.crumb a:hover{color:var(--primary)}
.crumb span.sep{color:var(--text-3)}
.page-hero h1{margin:16px 0 18px;max-width:960px}
.page-hero h1 em{font-style:normal;color:var(--secondary)}
.hero-lead{font-size:17px;max-width:720px;color:var(--text-2)}
.hero-chips{margin-top:30px;display:flex;gap:10px;overflow-x:auto;scrollbar-width:none;padding-bottom:4px}
.hero-chips::-webkit-scrollbar{display:none}
.hero-chips a{
  padding:8px 16px;border-radius:999px;font-size:13px;white-space:nowrap;
  border:1px solid var(--line-strong);color:var(--text-2);background:rgba(255,255,255,.03);transition:all var(--ease);
}
.hero-chips a:hover{color:var(--text);border-color:var(--primary);background:rgba(122,60,255,.14)}
.hero-stats{display:flex;flex-wrap:wrap;gap:34px;margin-top:38px;padding-top:28px;border-top:1px solid var(--line)}
.hero-stats .stat b{display:block;font-size:30px;font-weight:700;letter-spacing:-.02em;font-variant-numeric:tabular-nums;color:var(--text)}
.hero-stats .stat span{font-size:13px;color:var(--text-3)}

/* 卡片 */
.card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-deep);border-color:var(--primary)}
.card-cut{
  position:absolute;top:0;right:0;width:36px;height:36px;z-index:2;pointer-events:none;
  background:linear-gradient(225deg,rgba(122,60,255,.38),rgba(122,60,255,0) 72%);
  clip-path:polygon(100% 0,100% 100%,0 0);
}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line);background:var(--bg-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease}
.card:hover .card-media img{transform:scale(1.05)}
.card-body{padding:24px}
.card-body h3{font-size:19px;margin-bottom:10px}
.card-body p{font-size:14.5px;line-height:1.75;color:var(--text-2)}
.card-page{
  display:block;width:100%;height:100%;position:absolute;inset:0;z-index:3;
  text-indent:-9999px;overflow:hidden;
}
.card-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}
.card-foot .dot{color:var(--secondary)}

/* 图文块 */
.split{display:grid;grid-template-columns:repeat(2,1fr);gap:48px;align-items:center}
.split-media{
  border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:4/3;background:var(--bg-2);box-shadow:var(--shadow);
}
.split-media img{width:100%;height:100%;object-fit:cover}
.point-list{margin-top:24px;display:grid;gap:14px}
.point-list li{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 18px;font-size:14.5px;color:var(--text-2);
}
.point-list li svg{width:20px;height:20px;flex-shrink:0;color:var(--secondary);margin-top:3px}
.point-list li b{color:var(--text);font-weight:600}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;margin-top:20px}
.step{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:all var(--ease)}
.step:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow)}
.step-no{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;
  background:var(--primary);color:#fff;font-weight:700;font-size:14px;margin-bottom:16px;
  font-variant-numeric:tabular-nums;
}
.step h4{margin-bottom:8px}
.step p{font-size:14px;line-height:1.75}
.step::before{
  content:"";position:absolute;top:41px;left:-20px;width:20px;height:1px;background:var(--line);
}
.step:first-child::before{display:none}

/* 数据条 */
.data-band{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:36px;box-shadow:var(--shadow);
}
.data-band .item b{display:block;font-size:36px;font-weight:700;letter-spacing:-.02em;color:var(--text);font-variant-numeric:tabular-nums}
.data-band .item b em{font-style:normal;font-size:16px;color:var(--text-3);margin-left:6px}
.data-band .item span{font-size:13.5px;color:var(--text-3)}
.data-band .item p{font-size:14px;margin-top:10px}

/* 相关分类卡 */
.rel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.rel-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;transition:all var(--ease);
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-deep)}
.rel-card h3{font-size:17px;margin:14px 0 8px}
.rel-card p{font-size:13.5px;line-height:1.7}
.rel-card .arrow{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:13px;color:var(--primary)}

/* CTA 带 */
.cta-band{
  position:relative;padding:72px 0;text-align:center;
  background-image:linear-gradient(180deg,rgba(12,10,20,.72),rgba(12,10,20,.9)),url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-band h2{margin-bottom:14px}
.cta-band p{max-width:640px;margin:0 auto 28px;font-size:16.5px}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* 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:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{margin-bottom:18px}
.footer-brand p{font-size:14px;max-width:340px}
.footer-contact{margin-top:18px;display:grid;gap:8px;font-size:13.5px;color:var(--text-3)}
.footer-contact b{color:var(--text-2);font-weight:600}
.footer-col h4{font-size:14px;color:var(--primary);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2);transition:color var(--ease),transform var(--ease);display:inline-block}
.footer-col a:hover{color:var(--text);transform:translateX(2px)}
.footer-bottom{
  margin-top:56px;padding:22px 0 30px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* 悬浮 CTA 与回到顶部 */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:65;
  display:flex;align-items:center;gap:12px;
  height:48px;padding:0 8px 0 18px;max-width:220px;
  background:rgba(19,16,36,.86);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line-strong);border-radius:999px;box-shadow:var(--shadow-deep);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity 300ms ease,transform 300ms ease,visibility 300ms ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta .txt{font-size:13.5px;color:var(--text-2);white-space:nowrap}
.float-cta .btn{height:36px;padding:0 16px;font-size:13.5px;border-radius:999px}
.float-cta .close{
  width:26px;height:26px;border-radius:50%;border:1px solid var(--line-strong);
  background:transparent;color:var(--text-3);cursor:pointer;display:grid;place-items:center;
  font-size:14px;line-height:1;transition:all var(--ease);
}
.float-cta .close:hover{color:var(--text);border-color:var(--primary)}
.back-top{
  position:fixed;right:28px;bottom:92px;z-index:64;
  width:40px;height:40px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--bg-2);border:1px solid var(--line-strong);color:var(--text-2);
  cursor:pointer;opacity:0;visibility:hidden;transition:all var(--ease);
}
.back-top.is-visible{opacity:1;visibility:visible}
.back-top:hover{border-color:var(--primary);color:var(--text);background:rgba(122,60,255,.14)}
.back-top svg{width:18px;height:18px}

/* 响应式 */
@media (max-width:1200px){
  .nav-menu a{padding:8px 9px;font-size:13.5px}
  .logo-text{font-size:14px}
}
@media (max-width:1080px){
  .nav-menu{display:none}
  .burger{display:inline-flex}
  .header-link{display:none}
  .split{gap:34px}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step::before{display:none}
  .data-band{grid-template-columns:1fr;gap:20px;padding:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:820px){
  .split{grid-template-columns:1fr}
  .split-media{aspect-ratio:16/9}
  .grid-3{grid-template-columns:1fr}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .page-hero{padding:84px 0 52px}
  .hero-stats{gap:24px}
  .hero-stats .stat b{font-size:26px}
  .float-cta{
    right:0;left:0;bottom:0;max-width:none;border-radius:0;
    height:auto;min-height:56px;padding:8px 14px;
    padding-bottom:calc(8px + env(safe-area-inset-bottom));
    justify-content:space-between;
  }
  .float-cta .txt{white-space:normal;font-size:13px;line-height:1.4;max-width:52%}
  .float-cta .close{display:none}
  .back-top{right:16px;bottom:calc(74px + env(safe-area-inset-bottom))}
  body{padding-bottom:0}
  main{padding-bottom:56px}
}
@media (max-width:640px){
  .card-grid{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .card-body{padding:20px}
  .cta-actions .btn{width:100%}
}
@media (max-width:480px){
  h1{font-size:26px}
  h2{font-size:22px}
  .logo-text{font-size:13px;white-space:normal;line-height:1.25;max-width:150px}
  .header-inner{gap:12px}
  .badge{font-size:12px}
}

/* roulang page: category3 */
:root{
  --bg:#0C0A14;
  --bg-2:#131024;
  --surface:#181430;
  --surface-2:#211B3D;
  --primary:#7A3CFF;
  --primary-600:#6728F0;
  --secondary:#16E0C0;
  --accent:#FF6B4A;
  --text:#F4F2FF;
  --text-2:#B6AFD4;
  --text-3:#7C7699;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius:14px;
  --radius-sm:10px;
  --shadow:0 12px 32px rgba(9,6,22,.55);
  --shadow-lg:0 18px 44px rgba(9,6,22,.72);
  --ease:220ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.tabular{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(12,10,20,.72);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background var(--ease),box-shadow var(--ease);
}
.site-header.is-scrolled{background:rgba(12,10,20,.94);box-shadow:0 10px 30px rgba(6,4,14,.55)}
.nav-inner{display:flex;align-items:center;gap:24px;height:64px;transition:height var(--ease)}
.site-header.is-scrolled .nav-inner{height:56px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:34px;height:34px;display:grid;place-items:center;
  background:linear-gradient(135deg,#8B5CFF,#6728F0);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
}
.logo-mark svg{width:18px;height:18px}
.logo-text{font-weight:700;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:22px;margin-left:10px}
.nav-menu a{position:relative;font-size:15px;color:var(--text-2);padding:6px 0;white-space:nowrap;transition:color var(--ease)}
.nav-menu a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--primary);transition:width var(--ease)}
.nav-menu a:hover{color:var(--text)}
.nav-menu a.is-active{color:var(--text)}
.nav-menu a.is-active::after{width:100%}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:14px}
.icon-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;color:var(--text-2);transition:border-color var(--ease),color var(--ease),background var(--ease)}
.icon-btn:hover{border-color:var(--primary);color:var(--text);background:rgba(122,60,255,.12)}
.icon-btn svg{width:19px;height:19px}
.nav-text-link{font-size:14.5px;color:var(--text-2);transition:color var(--ease)}
.nav-text-link:hover{color:var(--text)}
.burger{display:none}
.search-row{border-top:1px solid var(--line);background:rgba(12,10,20,.96)}
.search-row[hidden]{display:none}
.search-form{display:flex;gap:12px;padding:14px 0}
.search-form input{
  flex:1;height:46px;padding:0 16px;border-radius:var(--radius-sm);
  background:var(--bg-2);border:1px solid var(--line);color:var(--text);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.search-form input::placeholder{color:var(--text-3)}
.search-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(122,60,255,.2)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-sm);
  font-size:15.5px;font-weight:600;border:1px solid transparent;
  transition:transform 200ms ease,background var(--ease),border-color var(--ease),box-shadow var(--ease),filter var(--ease);
}
.btn-primary{background:linear-gradient(135deg,#8B5CFF,#6728F0);color:var(--text);box-shadow:0 10px 24px rgba(103,40,240,.32)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:transparent;border-color:var(--line-strong);color:var(--text)}
.btn-secondary:hover{border-color:var(--primary);background:rgba(122,60,255,.12)}
.btn-sm{height:40px;padding:0 18px;font-size:14.5px}
.btn-block{width:100%}
.btn-ghost{background:transparent;color:var(--text-2);padding:0 6px;text-decoration:underline;text-decoration-color:var(--primary);text-underline-offset:6px}
.btn-ghost:hover{color:var(--text)}

/* ---------- page hero ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:var(--bg-2)}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(180deg,rgba(12,10,20,.84),rgba(12,10,20,.95)),var(--hero-img);
  background-size:cover;background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:1;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:56px 56px;
}
.page-hero-inner{position:relative;z-index:2;padding-top:60px;padding-bottom:56px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-3);margin-bottom:22px;flex-wrap:wrap}
.breadcrumb a{transition:color var(--ease)}
.breadcrumb a:hover{color:var(--text)}
.breadcrumb .current{color:var(--text-2)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  font-size:12.5px;letter-spacing:.06em;color:var(--secondary);
  border:1px solid rgba(22,224,192,.35);background:rgba(22,224,192,.08);
}
.page-hero h1{
  margin-top:18px;font-size:clamp(28px,4.2vw,46px);font-weight:800;
  line-height:1.18;letter-spacing:-.02em;max-width:920px;
}
.hero-sub{margin-top:18px;font-size:17px;color:var(--text-2);max-width:780px}
.chip-nav{display:flex;gap:10px;margin-top:28px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
.chip-nav::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;padding:8px 16px;border-radius:999px;font-size:14px;color:var(--text-2);
  border:1px solid var(--line-strong);transition:border-color var(--ease),color var(--ease),background var(--ease);
}
.chip:hover{border-color:var(--primary);color:var(--text);background:rgba(122,60,255,.12)}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:740px;margin-bottom:44px}
.section-head h2{font-size:clamp(24px,3.2vw,36px);font-weight:700;line-height:1.25;letter-spacing:-.01em}
.section-head p{margin-top:14px;color:var(--text-2)}
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ---------- cards ---------- */
.card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-lg)}
.card-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:rgba(122,60,255,.14);border:1px solid rgba(122,60,255,.3);color:var(--primary);
}
.card-icon svg{width:22px;height:22px}
.card h3{font-size:19px;font-weight:600;margin-bottom:10px;line-height:1.45}
.card p{color:var(--text-2);font-size:15px}

/* ---------- scenes ---------- */
.scene{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;margin-bottom:72px}
.scene:last-child{margin-bottom:0}
.scene-reverse .scene-media{order:2}
.scene-media{
  border-radius:16px;overflow:hidden;border:1px solid var(--line);
  aspect-ratio:16/10;background:var(--surface);
}
.scene-media img{width:100%;height:100%;object-fit:cover}
.scene-body h3{font-size:22px;font-weight:600;line-height:1.4;margin:14px 0 12px}
.scene-body p{color:var(--text-2)}
.badge{
  display:inline-flex;padding:5px 12px;border-radius:999px;font-size:12.5px;
  color:var(--secondary);border:1px solid rgba(22,224,192,.4);background:rgba(22,224,192,.08);
}
.dot-list{margin-top:16px;display:grid;gap:10px}
.dot-list li{position:relative;padding-left:20px;color:var(--text-2);font-size:15px}
.dot-list li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;
  background:var(--primary);transform:rotate(45deg);
}

/* ---------- timeline ---------- */
.timeline{position:relative;padding-left:52px}
.timeline::before{
  content:"";position:absolute;left:14px;top:14px;bottom:14px;width:2px;
  background:linear-gradient(180deg,rgba(122,60,255,.9),rgba(122,60,255,.12));
}
.tl-item{position:relative;margin-bottom:28px}
.tl-item:last-child{margin-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-45px;top:32px;width:14px;height:14px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 0 4px rgba(122,60,255,.16);
}
.tl-card{
  display:grid;grid-template-columns:1fr 280px;gap:24px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.tl-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-lg)}
.tl-num{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--primary);font-variant-numeric:tabular-nums}
.tl-body h3{margin:10px 0 10px;font-size:20px;font-weight:600;line-height:1.45}
.tl-body p{color:var(--text-2);font-size:15.5px}
.tl-media{border-radius:12px;overflow:hidden;border:1px solid var(--line);aspect-ratio:16/10;background:var(--bg-2)}
.tl-media img{width:100%;height:100%;object-fit:cover}

/* ---------- checklist ---------- */
.check-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 24px}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;padding:16px 18px;font-size:15px;color:var(--text-2);
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  transition:border-color var(--ease),color var(--ease),background var(--ease);
}
.check-list li:hover{border-color:rgba(22,224,192,.5);color:var(--text);background:var(--surface-2)}
.check-list svg{flex:0 0 auto;width:18px;height:18px;color:var(--secondary);margin-top:5px}
.check-note{margin-top:26px;font-size:13.5px;color:var(--text-3)}

/* ---------- qa ---------- */
.qa-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.qa-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.qa-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-lg)}
.qa-card h3{display:flex;gap:10px;font-size:17px;font-weight:600;line-height:1.5;margin-bottom:10px}
.qa-card h3 span{color:var(--primary);flex:0 0 auto}
.qa-card p{color:var(--text-2);font-size:15px}

/* ---------- related ---------- */
.related-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.related-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-lg)}
.related-card h3{font-size:17px;font-weight:600;margin-bottom:8px}
.related-card p{font-size:14.5px;color:var(--text-2)}
.related-card .arrow{display:inline-block;margin-top:14px;font-size:14px;color:var(--primary)}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--bg-2);border-top:1px solid var(--line);padding:80px 0}
.cta-band-bg{
  position:absolute;inset:0;
  background-image:linear-gradient(90deg,rgba(12,10,20,.95),rgba(12,10,20,.7)),var(--cta-img);
  background-size:cover;background-position:center;
}
.cta-inner{position:relative;z-index:2;max-width:760px;text-align:center;margin:0 auto}
.cta-inner h2{font-size:clamp(24px,3.2vw,34px);font-weight:700;line-height:1.28}
.cta-inner p{margin-top:14px;color:var(--text-2)}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:28px}

/* ---------- footer ---------- */
.site-footer{position:relative;background:var(--bg-2);border-top:1px solid var(--line);padding:72px 0 28px;overflow:hidden}
.site-footer::before{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
  background-size:56px 56px;
}
.footer-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin-top:16px;font-size:14.5px;color:var(--text-2);max-width:340px}
.footer-contact{margin-top:18px;display:grid;gap:8px;font-size:13.5px;color:var(--text-3)}
.footer-contact b{color:var(--text-2);font-weight:600}
.footer-col h4{font-size:14px;font-weight:600;color:var(--primary);margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{display:inline-block;font-size:14px;color:var(--text-2);transition:color var(--ease),transform var(--ease)}
.footer-col a:hover{color:var(--text);transform:translateX(2px)}
.footer-bottom{
  position:relative;z-index:1;margin-top:56px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--text-3);
}

/* ---------- floating ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;max-width:220px;
  display:flex;align-items:center;gap:10px;padding:6px;border-radius:999px;
  background:rgba(12,10,20,.86);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line-strong);box-shadow:0 14px 32px rgba(9,6,22,.6);
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity 300ms ease,transform 300ms ease;
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-close{
  width:32px;height:32px;border-radius:50%;border:1px solid var(--line);color:var(--text-3);
  display:grid;place-items:center;font-size:16px;line-height:1;transition:color var(--ease),border-color var(--ease);
}
.float-close:hover{color:var(--text);border-color:var(--primary)}
.to-top{
  position:fixed;right:28px;bottom:96px;z-index:69;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line-strong);background:rgba(18,16,36,.9);color:var(--text-2);
  display:grid;place-items:center;opacity:0;pointer-events:none;
  transition:opacity var(--ease),color var(--ease),border-color var(--ease);
}
.to-top.is-visible{opacity:1;pointer-events:auto}
.to-top:hover{color:var(--text);border-color:var(--primary)}

/* ---------- drawer ---------- */
.overlay{
  position:fixed;inset:0;z-index:85;background:rgba(6,4,14,.6);
  opacity:0;pointer-events:none;transition:opacity 240ms ease;
}
.overlay.is-open{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;z-index:90;height:100%;width:84vw;max-width:360px;
  background:var(--bg-2);border-left:1px solid var(--line);padding:22px;
  display:flex;flex-direction:column;gap:22px;overflow-y:auto;
  transform:translateX(100%);transition:transform 260ms ease;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-nav{display:grid;gap:2px}
.drawer-nav a{padding:13px 0;border-bottom:1px solid var(--line);font-size:15.5px;color:var(--text-2)}
.drawer-nav a.is-active{color:var(--primary)}
.drawer-search input{
  width:100%;height:46px;padding:0 16px;border-radius:var(--radius-sm);
  background:var(--bg);border:1px solid var(--line);color:var(--text);
}
.drawer-search input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(122,60,255,.2)}
body.drawer-open{overflow:hidden}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .nav-menu{gap:16px}
  .nav-menu a{font-size:14.5px}
  .scene{gap:40px}
  .tl-card{grid-template-columns:1fr 220px}
}
@media (max-width:1023px){
  .nav-menu,.nav-text-link{display:none}
  .burger{display:grid}
  .section{padding:72px 0}
  .scene{grid-template-columns:1fr;gap:28px}
  .scene-reverse .scene-media{order:0}
  .grid-2{grid-template-columns:1fr}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .page-hero-inner{padding-top:44px;padding-bottom:44px}
  .timeline{padding-left:36px}
  .timeline::before{left:12px}
  .tl-item::before{left:-30px;top:26px}
  .tl-card{grid-template-columns:1fr;padding:20px}
  .qa-grid{grid-template-columns:1fr}
  .check-list{grid-template-columns:1fr}
  .cta-band{padding:60px 0}
  .float-cta{
    left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));
    max-width:none;justify-content:space-between;border-radius:14px;
  }
  .to-top{right:20px;bottom:calc(88px + env(safe-area-inset-bottom))}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .grid-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .logo-text{font-size:15.5px}
  .btn{height:46px;padding:0 22px;font-size:15px}
  .card,.qa-card{padding:20px}
}

/* roulang page: category4 */
:root{
  --bg:#0C0A14;
  --bg-2:#131024;
  --surface:#181430;
  --surface-2:#211B3D;
  --primary:#7A3CFF;
  --primary-600:#6728F0;
  --secondary:#16E0C0;
  --accent:#FF6B4A;
  --text:#F4F2FF;
  --text-2:#B6AFD4;
  --text-3:#7C7699;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-card:0 12px 32px rgba(9,6,22,.55);
  --shadow-hover:0 18px 42px rgba(9,6,22,.72);
  --container:1240px;
  --font:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  --mono:"Barlow","SFMono-Regular",Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--primary);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.01em}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(12,10,20,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background .22s ease;
}
.header-inner{display:flex;align-items:center;gap:26px;min-height:64px;transition:min-height .22s ease}
.site-header.is-scrolled .header-inner{min-height:56px}
.site-header.is-scrolled{background:rgba(12,10,20,.9)}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:16px;color:var(--text);flex:none}
.logo-mark{
  width:34px;height:34px;display:grid;place-items:center;
  background:linear-gradient(135deg,#8B5CFF,#6728F0);
  border-radius:10px;box-shadow:0 8px 18px rgba(103,40,240,.35);
  clip-path:polygon(0 0,100% 0,100% 74%,74% 100%,0 100%);
}
.logo-mark svg{width:18px;height:18px}
.logo-text{white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:22px;font-size:14.5px;color:var(--text-2)}
.nav-menu a{position:relative;padding:6px 0;white-space:nowrap;transition:color .2s ease}
.nav-menu a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary);
  transform:scaleX(0);transform-origin:left;transition:transform .22s ease;border-radius:2px;
}
.nav-menu a:hover{color:var(--text)}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-menu a.is-active{color:var(--text);font-weight:600}
.nav-menu a.is-active::after{transform:scaleX(1)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.icon-btn{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:transparent;display:grid;place-items:center;cursor:pointer;
  transition:border-color .2s ease,background .2s ease;
}
.icon-btn:hover{border-color:var(--primary);background:rgba(122,60,255,.12)}
.icon-btn svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.header-link{font-size:14px;color:var(--text-2);transition:color .2s ease;white-space:nowrap}
.header-link:hover{color:var(--text)}
.hamburger{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:transparent;cursor:pointer;padding:0;place-items:center;gap:5px;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;margin:3px auto}
.header-search{max-height:0;overflow:hidden;border-top:0 solid var(--line);transition:max-height .26s ease,border-width .26s ease}
.header-search.is-open{max-height:100px;border-top-width:1px}
.search-inner{padding:14px 0}
.search-inner form{display:flex;gap:12px;align-items:center}
.search-inner input{
  flex:1;height:46px;border-radius:10px;border:1px solid var(--line);
  background:var(--bg-2);padding:0 16px;font-size:15px;transition:border-color .2s ease,box-shadow .2s ease;
}
.search-inner input::placeholder{color:var(--text-3)}
.search-inner input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(122,60,255,.28)}

/* ============ 通用按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,filter .2s ease,color .2s ease;
}
.btn-primary{background:linear-gradient(135deg,#8B5CFF,#6728F0);color:#F4F2FF;box-shadow:0 10px 24px rgba(103,40,240,.32)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:transparent;border-color:var(--line-strong);color:var(--text)}
.btn-secondary:hover{border-color:var(--primary);background:rgba(122,60,255,.12)}
.btn-ghost{height:auto;padding:0 0 2px;background:none;color:var(--primary);border-bottom:2px solid rgba(122,60,255,.5);border-radius:0}
.btn-ghost:hover{color:#A98BFF;border-bottom-color:var(--primary)}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:9px}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

/* ============ 页头 ============ */
.page-hero{
  position:relative;overflow:hidden;
  padding:104px 0 68px;
  background:
    linear-gradient(115deg,rgba(12,10,20,.94) 12%,rgba(19,16,36,.76) 100%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.04;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:56px 56px;
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-3);flex-wrap:wrap}
.breadcrumb a{color:var(--text-3);transition:color .2s ease}
.breadcrumb a:hover{color:var(--text)}
.breadcrumb span{color:var(--text-2)}
.page-hero h1{
  margin-top:18px;font-size:clamp(30px,4.6vw,52px);font-weight:800;
  letter-spacing:-.02em;line-height:1.18;max-width:22em;
}
.page-hero .hero-sub{margin-top:16px;color:var(--text-2);font-size:17px;max-width:44em}
.anchor-chips{display:flex;gap:10px;margin-top:28px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
.anchor-chips::-webkit-scrollbar{display:none}
.anchor-chips a{
  flex:none;display:inline-flex;align-items:center;height:40px;padding:0 18px;border-radius:999px;
  border:1px solid var(--line-strong);font-size:14px;color:var(--text-2);
  transition:border-color .2s ease,background .2s ease,color .2s ease;
}
.anchor-chips a:hover{color:var(--text);border-color:var(--primary)}
.anchor-chips a.is-active{color:var(--text);border-color:var(--primary);background:rgba(122,60,255,.12)}

/* ============ 区块 ============ */
.section{padding:96px 0}
.section-alt{padding:96px 0;background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:44px}
.section-title{font-size:clamp(24px,3.2vw,36px);font-weight:700}
.section-sub{margin-top:14px;color:var(--text-2);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;
  border:1px solid rgba(22,224,192,.35);background:rgba(22,224,192,.08);
  color:var(--secondary);font-size:12.5px;letter-spacing:.06em;margin-bottom:18px;
}

/* ============ 概览统计 ============ */
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.stat{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;position:relative;overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.stat::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--primary),transparent);
}
.stat:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-hover)}
.stat b{display:block;font-size:clamp(28px,3.4vw,38px);font-weight:800;font-family:var(--mono)}
.stat b em{font-style:normal;font-size:16px;color:var(--text-2);margin-left:4px;font-weight:600}
.stat span{display:block;margin-top:8px;font-size:13px;color:var(--text-3)}

/* ============ 对比表 ============ */
.table-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--surface);box-shadow:var(--shadow-card);-webkit-overflow-scrolling:touch;
}
table.compare{width:100%;min-width:920px;border-collapse:collapse;font-size:15px}
table.compare caption{
  caption-side:top;text-align:left;padding:18px 22px 4px;font-size:12.5px;color:var(--text-3);
}
.compare thead th{
  background:var(--surface-2);text-align:left;padding:16px 22px;font-size:14px;font-weight:600;
  color:var(--text);border-bottom:1px solid var(--line-strong);white-space:nowrap;
}
.compare td{padding:16px 22px;border-bottom:1px solid var(--line);color:var(--text-2);vertical-align:top;line-height:1.7}
.compare tbody tr:last-child td{border-bottom:none}
.compare tbody tr:hover td{background:rgba(122,60,255,.06)}
.compare td:first-child{color:var(--text);font-weight:600;white-space:nowrap}
.compare .tag{display:inline-block;font-size:12.5px;padding:2px 10px;border-radius:999px;border:1px solid var(--line-strong);color:var(--text-2);margin-left:6px}
.table-hint{margin-top:14px;font-size:12.5px;color:var(--text-3)}

/* ============ 注解卡 ============ */
.note-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.note-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px;position:relative;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.note-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-hover)}
.note-num{
  font-family:var(--mono);font-size:14px;font-weight:700;color:var(--secondary);
  letter-spacing:.08em;
}
.note-card h3{margin-top:12px;font-size:18px;font-weight:600}
.note-card p{margin-top:10px;color:var(--text-2);font-size:15px;line-height:1.8}

/* ============ 次要 CTA 行 ============ */
.inline-cta{
  margin-top:36px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-card);padding:22px 26px;
}
.inline-cta p{color:var(--text-2);font-size:15px;max-width:56em}

/* ============ 检查清单 ============ */
.split{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.check-list li{
  display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line);
}
.check-list li:last-child{border-bottom:none}
.check-icon{
  flex:none;width:24px;height:24px;border-radius:8px;display:grid;place-items:center;
  background:rgba(22,224,192,.12);border:1px solid rgba(22,224,192,.4);margin-top:4px;
}
.check-icon svg{width:13px;height:13px;stroke:var(--secondary);fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.check-list strong{display:block;font-size:16px;font-weight:600}
.check-list span{display:block;color:var(--text-2);font-size:15px;margin-top:2px}
.media-frame{
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  background:linear-gradient(160deg,rgba(122,60,255,.14),rgba(12,10,20,.2));
  box-shadow:var(--shadow-card);
}
.media-frame img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s ease}
.media-frame:hover img{transform:scale(1.03)}
.media-frame figcaption{padding:12px 16px;font-size:12.5px;color:var(--text-3);text-align:center;border-top:1px solid var(--line)}

/* ============ 相关分类卡 ============ */
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.related-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.related-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-hover)}
.related-card figure{margin:0;overflow:hidden}
.related-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease}
.related-card:hover img{transform:scale(1.04)}
.related-body{padding:20px}
.related-body h3{font-size:17px;font-weight:600}
.related-body p{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.75}
.related-more{margin-top:14px;font-size:14px;color:var(--primary);font-weight:600}

/* ============ 底部 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;padding:88px 0;
  background:
    linear-gradient(120deg,rgba(12,10,20,.92),rgba(19,16,36,.86)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border-top:1px solid var(--line);
}
.cta-band .container{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta-band h2{font-size:clamp(24px,3.2vw,34px);font-weight:700}
.cta-band p{margin-top:12px;color:var(--text-2);max-width:38em}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-2);border-top:1px solid var(--line);padding:72px 0 32px;position:relative;overflow:hidden}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.04;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:56px 56px;
}
.site-footer .container{position:relative;z-index:2}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin-top:16px;color:var(--text-2);font-size:14.5px;max-width:32em;line-height:1.85}
.footer-contact{margin-top:18px;display:flex;flex-direction:column;gap:8px;font-size:14px;color:var(--text-3)}
.footer-contact b{color:var(--text-2);font-weight:600}
.footer-col h4{font-size:14px;color:var(--primary);font-weight:600;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .2s ease,transform .2s ease;display:inline-block}
.footer-col a:hover{color:var(--text);transform:translateX(2px)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ============ 浮层组件 ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:flex;align-items:center;gap:12px;
  max-width:220px;padding:6px 6px 6px 18px;border-radius:999px;
  background:rgba(19,16,36,.86);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line-strong);box-shadow:var(--shadow-card);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta .fc-text{font-size:13.5px;color:var(--text-2);white-space:nowrap}
.float-cta .fc-close{
  width:30px;height:30px;border-radius:999px;border:1px solid var(--line);background:transparent;
  display:grid;place-items:center;cursor:pointer;flex:none;transition:border-color .2s ease,color .2s ease;
}
.float-cta .fc-close:hover{border-color:var(--primary);color:var(--primary)}
.float-cta .fc-close svg{width:12px;height:12px;stroke:currentColor;fill:none;stroke-width:2.2;stroke-linecap:round}
.back-top{
  position:fixed;right:28px;bottom:92px;z-index:69;width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line-strong);background:rgba(19,16,36,.86);cursor:pointer;
  display:grid;place-items:center;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,border-color .2s ease;
}
.back-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{border-color:var(--primary);color:var(--primary)}
.back-top svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

/* ============ 移动抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,4,14,.6);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:90;
  background:var(--bg-2);border-left:1px solid var(--line);
  transform:translateX(104%);transition:transform .26s ease;
  padding:24px;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:24px}
.drawer-nav a{
  padding:13px 0;border-bottom:1px solid var(--line);font-size:15px;color:var(--text-2);
  transition:color .2s ease;
}
.drawer-nav a:hover{color:var(--text)}
.drawer-nav a.is-active{color:var(--text);font-weight:600}
.drawer-form{display:flex;gap:10px;margin-bottom:22px}
.drawer-form input{
  flex:1;height:44px;border-radius:10px;border:1px solid var(--line);background:var(--bg);
  padding:0 14px;font-size:14px;
}
.drawer-form input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(122,60,255,.28)}
body.no-scroll{overflow:hidden}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .nav-menu{gap:16px;font-size:14px}
  .header-link{display:none}
  .stat-row{grid-template-columns:repeat(2,1fr)}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr;gap:36px}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .hamburger{display:grid}
  .section,.section-alt{padding:72px 0}
  .page-hero{padding:88px 0 56px}
  .note-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{padding:72px 0}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section,.section-alt{padding:56px 0}
  .page-hero{padding:80px 0 48px}
  .page-hero h1{font-size:clamp(26px,7vw,34px)}
  .stat-row{grid-template-columns:1fr;gap:16px}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .cta-band .container{flex-direction:column;align-items:flex-start}
  .inline-cta{flex-direction:column;align-items:flex-start}
  .float-cta{
    left:0;right:0;bottom:0;max-width:none;border-radius:0;
    padding:10px 14px calc(10px + env(safe-area-inset-bottom));
    justify-content:space-between;border-left:none;border-right:none;border-bottom:none;
  }
  .float-cta .fc-text{font-size:13px}
  .back-top{right:16px;bottom:84px}
}
@media (max-width:520px){
  .logo-text{font-size:15px}
  .btn{width:100%}
  .hero-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  table.compare{min-width:780px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important;animation-duration:.001ms !important;scroll-behavior:auto !important}
}

/* roulang page: category5 */
:root{
  --bg:#0C0A14;
  --bg-2:#131024;
  --surface:#181430;
  --surface-2:#211B3D;
  --primary:#7A3CFF;
  --primary-600:#6728F0;
  --primary-soft:rgba(122,60,255,.12);
  --secondary:#16E0C0;
  --accent:#FF6B4A;
  --text:#F4F2FF;
  --text-2:#B6AFD4;
  --text-3:#7C7699;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --radius-card:14px;
  --radius-btn:10px;
  --shadow-card:0 12px 32px rgba(9,6,22,.55);
  --shadow-lift:0 18px 42px rgba(9,6,22,.72);
  --container:1240px;
  --ease:220ms ease;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --font-num:"Barlow","PingFang SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:92px}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;padding:0}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
::selection{background:rgba(122,60,255,.4);color:#fff}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head h2{font-size:clamp(24px,3.2vw,36px);font-weight:700;line-height:1.25;letter-spacing:-.01em}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--secondary);
  border:1px solid rgba(22,224,192,.32);
  background:rgba(22,224,192,.08);
  padding:5px 14px;border-radius:999px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--secondary)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn-primary{
  color:#F4F2FF;
  background:linear-gradient(135deg,#8B5CFF 0%,#6728F0 100%);
  border:1px solid rgba(139,92,255,.55);
  box-shadow:0 10px 26px rgba(103,40,240,.34);
}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);box-shadow:0 14px 32px rgba(103,40,240,.46)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{
  color:var(--text);
  background:transparent;
  border:1px solid var(--line-strong);
}
.btn-secondary:hover{border-color:var(--primary);background:var(--primary-soft);transform:translateY(-1px)}
.btn-ghost{
  color:var(--text-2);padding:0 4px;height:44px;position:relative;
}
.btn-ghost::after{
  content:"";position:absolute;left:4px;right:4px;bottom:8px;height:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease);
}
.btn-ghost:hover{color:var(--text)}
.btn-ghost:hover::after{transform:scaleX(1)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn-block{width:100%}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed}

.icon-btn{
  width:40px;height:40px;border-radius:var(--radius-btn);
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--text-2);
  transition:all var(--ease);background:transparent;
}
.icon-btn:hover{color:var(--text);border-color:var(--primary);background:var(--primary-soft)}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;line-height:1;padding:6px 12px;border-radius:999px;
  border:1px solid rgba(22,224,192,.34);color:var(--secondary);
  background:rgba(22,224,192,.08);
}
.badge-primary{border-color:rgba(122,60,255,.4);color:#CBB6FF;background:var(--primary-soft)}
.badge-accent{border-color:rgba(255,107,74,.38);color:#FFB29C;background:rgba(255,107,74,.1)}
.badge-muted{border-color:var(--line-strong);color:var(--text-3);background:transparent}

/* ============ 头部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(12,10,20,.72);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:height var(--ease),background var(--ease);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  height:76px;transition:height var(--ease);
}
.site-header.is-scrolled .header-inner{height:60px}
.site-header.is-scrolled{background:rgba(12,10,20,.92)}
.header-left{display:flex;align-items:center;gap:28px;min-width:0}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,#8B5CFF,#6728F0);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
  flex-shrink:0;
}
.logo-mark svg{width:19px;height:19px}
.logo-text{font-size:17px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{
  position:relative;
  display:inline-block;padding:10px 12px;font-size:14.5px;color:var(--text-2);
  transition:color var(--ease);
}
.nav-menu a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--primary);border-radius:2px;transform:scaleX(0);transition:transform var(--ease);
}
.nav-menu a:hover{color:var(--text)}
.nav-menu a:hover::after{transform:scaleX(1)}
.nav-menu a.is-active{color:var(--text);font-weight:600}
.nav-menu a.is-active::after{transform:scaleX(1)}
.header-right{display:flex;align-items:center;gap:10px}
.header-search-link{font-size:14.5px;color:var(--text-2);padding:0 6px;transition:color var(--ease)}
.header-search-link:hover{color:var(--text)}
.hamburger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-btn);align-items:center;justify-content:center;color:var(--text)}
.hamburger span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px}
.hamburger span::before{top:-6px}
.hamburger span::after{top:6px}
.search-row{
  display:none;border-top:1px solid var(--line);background:rgba(12,10,20,.96);
}
.search-row.is-open{display:block}
.search-row-inner{display:flex;align-items:center;gap:12px;padding:14px 0}
.search-row input{
  flex:1;height:46px;border-radius:var(--radius-btn);
  background:var(--bg-2);border:1px solid var(--line);padding:0 16px;color:var(--text);
}
.search-row input::placeholder{color:var(--text-3)}
.search-row input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(122,60,255,.28)}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,4,14,.6);opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease);z-index:95;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:96;
  background:var(--bg-2);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform 240ms ease;
  padding:22px 22px calc(28px + env(safe-area-inset-bottom));
  display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-nav{display:flex;flex-direction:column;gap:2px}
.drawer-nav a{
  padding:14px 12px;border-radius:10px;color:var(--text-2);font-size:15.5px;
  border:1px solid transparent;transition:all var(--ease);
}
.drawer-nav a:hover,.drawer-nav a.is-active{color:var(--text);background:var(--primary-soft);border-color:rgba(122,60,255,.36)}
.drawer-search{display:flex;gap:8px}
.drawer-search input{
  flex:1;height:44px;border-radius:var(--radius-btn);background:var(--bg);
  border:1px solid var(--line);padding:0 14px;
}
.drawer-search input:focus{outline:none;border-color:var(--primary)}

/* ============ 页头 ============ */
.page-hero{
  position:relative;overflow:hidden;
  padding:150px 0 78px;
  border-bottom:1px solid var(--line);
  background:var(--bg-2);
}
.page-hero-bg{
  position:absolute;inset:0;
  background-position:center;background-size:cover;background-repeat:no-repeat;
  opacity:.42;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,10,20,.86) 0%,rgba(12,10,20,.94) 62%,rgba(12,10,20,1) 100%);
}
.page-hero::before{
  content:"";position:absolute;inset:0;z-index:1;opacity:.04;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:56px 56px;
}
.page-hero-inner{position:relative;z-index:2;max-width:900px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-3);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-3);transition:color var(--ease)}
.breadcrumb a:hover{color:var(--text-2)}
.breadcrumb span.sep{color:var(--text-3);opacity:.6}
.breadcrumb .current{color:var(--text-2)}
.page-hero h1{
  font-size:clamp(28px,4vw,46px);font-weight:800;line-height:1.2;letter-spacing:-.02em;
  margin:16px 0 18px;
}
.page-hero p.lead{font-size:17px;color:var(--text-2);max-width:760px}
.chips{display:flex;gap:10px;margin-top:30px;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chips a{
  flex:0 0 auto;font-size:13.5px;padding:9px 16px;border-radius:999px;
  border:1px solid var(--line-strong);color:var(--text-2);transition:all var(--ease);
}
.chips a:hover{color:var(--text);border-color:var(--primary);background:var(--primary-soft)}

/* ============ 卡片 ============ */
.card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,10px 100%,0 calc(100% - 10px));
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);border-color:rgba(122,60,255,.5)}
.card h3{font-size:19px;font-weight:600;margin-bottom:10px}
.card p{color:var(--text-2);font-size:15px}
.card-icon{
  width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(122,60,255,.36);background:var(--primary-soft);color:#C6AEFF;margin-bottom:16px;
}
.card-icon svg{width:22px;height:22px}
.card-icon.alt{border-color:rgba(22,224,192,.34);background:rgba(22,224,192,.08);color:var(--secondary)}

.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ============ 速查卡 ============ */
.quick-grid{grid-template-columns:repeat(4,1fr)}
.quick-card{display:flex;flex-direction:column;height:100%}
.quick-card .badge{align-self:flex-start;margin-bottom:14px}
.quick-card ul{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.quick-card ul li{
  position:relative;padding-left:16px;font-size:14px;color:var(--text-2);
}
.quick-card ul li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:2px;background:var(--primary);
}

/* ============ 图文排查路径 ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split-media{
  border-radius:18px;overflow:hidden;border:1px solid var(--line);
  background:var(--surface-2);aspect-ratio:4/3;
}
.split-media img{width:100%;height:100%;object-fit:cover}
.steps{margin-top:26px;display:flex;flex-direction:column;gap:0}
.step{position:relative;padding:0 0 26px 34px}
.step:last-child{padding-bottom:0}
.step::before{
  content:"";position:absolute;left:9px;top:20px;bottom:0;width:1px;background:var(--line);
}
.step:last-child::before{display:none}
.step::after{
  content:"";position:absolute;left:4px;top:7px;width:12px;height:12px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 0 4px rgba(122,60,255,.16);
}
.step h4{font-size:17px;font-weight:600;margin-bottom:6px}
.step p{font-size:15px;color:var(--text-2)}

/* ============ FAQ 手风琴 ============ */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-aside h2{font-size:clamp(24px,3.2vw,34px);font-weight:700;line-height:1.25}
.faq-aside p{margin-top:14px;color:var(--text-2)}
.faq-list{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;
  padding:20px 4px;min-height:64px;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--text);transition:color var(--ease);
}
.faq-q:hover{color:#CBB6FF}
.faq-q .mark{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;
  font-size:16px;line-height:1;color:var(--text-2);
  transition:transform var(--ease),border-color var(--ease),color var(--ease);
}
.faq-item.is-open .faq-q .mark{transform:rotate(180deg);border-color:var(--primary);color:#CBB6FF}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease}
.faq-a-inner{padding:0 4px 24px;font-size:17px;line-height:1.8;color:var(--text-2)}
.faq-item.is-open .faq-a{max-height:520px}

/* ============ 表单 ============ */
.ask-layout{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:start}
.ask-info .info-list{margin-top:24px;display:flex;flex-direction:column;gap:16px}
.ask-info .info-list li{
  display:flex;gap:14px;padding:16px 18px;border-radius:12px;
  background:var(--surface);border:1px solid var(--line);
}
.ask-info .info-list li b{display:block;font-size:15px;font-weight:600;margin-bottom:4px}
.ask-info .info-list li span{font-size:14px;color:var(--text-2);line-height:1.7}
.ask-info .info-list .dot{
  flex:0 0 8px;width:8px;height:8px;border-radius:50%;background:var(--secondary);margin-top:9px;
}
.form-card{padding:32px}
.form-card h3{font-size:21px;margin-bottom:8px}
.form-card .form-sub{color:var(--text-2);font-size:14.5px;margin-bottom:26px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;margin-bottom:18px}
.field label{font-size:13px;color:var(--text-2);margin-bottom:8px}
.field label .req{color:var(--accent)}
.field input,.field select,.field textarea{
  width:100%;height:46px;border-radius:var(--radius-btn);
  background:var(--bg-2);border:1px solid var(--line);
  padding:0 14px;color:var(--text);transition:border-color var(--ease),box-shadow var(--ease);
}
.field textarea{height:auto;min-height:130px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-3) 50%),linear-gradient(135deg,var(--text-3) 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 14px) 20px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--primary);box-shadow:0 0 0 2px rgba(122,60,255,.3);
}
.field.has-error input,.field.has-error select,.field.has-error textarea{
  border-color:var(--accent);box-shadow:0 0 0 2px rgba(255,107,74,.18);
}
.field.has-success input,.field.has-success textarea,.field.has-success select{
  border-color:var(--secondary);
}
.field .msg{font-size:12.5px;margin-top:7px;color:var(--accent);display:none}
.field.has-error .msg{display:block}
.form-note{font-size:12.5px;color:var(--text-3);margin-top:14px;line-height:1.7}
.form-success{
  display:none;margin-top:20px;padding:16px 18px;border-radius:12px;
  border:1px solid rgba(22,224,192,.36);background:rgba(22,224,192,.08);
  color:#9DF3E4;font-size:14.5px;
}
.form-success.is-visible{display:block}

/* ============ 相关分类 ============ */
.rel-card{
  display:flex;flex-direction:column;overflow:hidden;padding:0;
}
.rel-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);border-bottom:1px solid var(--line)}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 260ms ease}
.rel-card:hover .thumb img{transform:translateY(-4px) scale(1.02)}
.rel-card .body{padding:22px 22px 26px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-card .body h3{font-size:17.5px;margin:0}
.rel-card .body p{font-size:14.5px;color:var(--text-2)}
.rel-card .link{margin-top:auto;font-size:14px;color:#C6AEFF;display:inline-flex;align-items:center;gap:6px}
.rel-card .link svg{width:16px;height:16px;transition:transform var(--ease)}
.rel-card:hover .link svg{transform:translateX(3px)}

/* ============ 底部 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--bg-2);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:80px 0;
}
.cta-band .bg{
  position:absolute;inset:0;background-position:center;background-size:cover;opacity:.28;
}
.cta-band::after{
  content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(12,10,20,.94),rgba(12,10,20,.78));
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(22px,2.8vw,32px);font-weight:700;line-height:1.3;max-width:620px}
.cta-inner p{color:var(--text-2);margin-top:12px;max-width:600px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg);padding:72px 0 32px;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{margin-bottom:18px}
.footer-brand p{font-size:14.5px;color:var(--text-2);max-width:340px}
.footer-contact{margin-top:20px;display:flex;flex-direction:column;gap:8px;font-size:13.5px;color:var(--text-3)}
.footer-contact b{color:var(--text-2);font-weight:600}
.footer-col h4{font-size:14px;color:var(--primary);font-weight:600;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:var(--text-2);transition:color var(--ease),transform var(--ease);display:inline-block}
.footer-col ul a:hover{color:var(--text);transform:translateX(2px)}
.footer-bottom{
  margin-top:56px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ============ 悬浮 CTA ============ */
.float-stack{
  position:fixed;right:28px;bottom:28px;z-index:80;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
}
.back-top{
  width:40px;height:40px;border-radius:50%;border:1px solid var(--line-strong);
  background:rgba(24,20,48,.92);color:var(--text-2);
  display:flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transition:all var(--ease);
}
.back-top.is-visible{opacity:1;visibility:visible}
.back-top:hover{color:var(--text);border-color:var(--primary);background:var(--primary-soft)}
.float-cta{
  display:flex;align-items:center;gap:10px;
  background:rgba(24,20,48,.86);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line-strong);border-radius:999px;
  padding:6px 8px 6px 18px;max-width:220px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity 300ms ease,transform 300ms ease,visibility 300ms ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta .txt{font-size:13.5px;color:var(--text-2);white-space:nowrap}
.float-cta .go{
  height:36px;padding:0 16px;border-radius:999px;font-size:13.5px;font-weight:600;
  color:#F4F2FF;background:linear-gradient(135deg,#8B5CFF,#6728F0);
  display:inline-flex;align-items:center;
}
.float-cta .close{
  width:28px;height:28px;border-radius:50%;color:var(--text-3);font-size:16px;line-height:1;
  display:flex;align-items:center;justify-content:center;transition:color var(--ease);
}
.float-cta .close:hover{color:var(--text)}
.mobile-bar{display:none}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .nav-menu a{padding:10px 9px;font-size:14px}
  .header-left{gap:18px}
  .quick-grid{grid-template-columns:repeat(2,1fr)}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .ask-layout{grid-template-columns:1fr;gap:36px}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .header-search-link{display:none}
  .hamburger{display:flex}
  .section{padding:72px 0}
  .split{grid-template-columns:1fr;gap:32px}
  .split.reverse .split-media{order:-1}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .page-hero{padding:132px 0 62px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-head{margin-bottom:32px}
  .header-inner{height:64px}
  .site-header.is-scrolled .header-inner{height:56px}
  .logo-text{font-size:15.5px}
  .grid-2,.grid-3,.grid-4,.quick-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr;gap:0}
  .form-card{padding:24px}
  .page-hero{padding:118px 0 52px}
  .page-hero h1{font-size:26px}
  .cta-band{padding:56px 0}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:8px}
  .footer-col{border-top:1px solid var(--line);padding-top:16px;margin-top:16px}
  .footer-col h4{margin-bottom:12px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .float-stack{display:none}
  .mobile-bar{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    position:fixed;left:0;right:0;bottom:0;z-index:80;
    height:calc(56px + env(safe-area-inset-bottom));
    padding:0 16px calc(env(safe-area-inset-bottom)) 16px;
    background:rgba(19,16,36,.96);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    border-top:1px solid var(--line-strong);
    transform:translateY(120%);transition:transform 300ms ease;
  }
  .mobile-bar.is-visible{transform:translateY(0)}
  .mobile-bar .txt{font-size:13px;color:var(--text-2);line-height:1.3}
  .mobile-bar .go{
    height:40px;padding:0 18px;border-radius:999px;font-size:14px;font-weight:600;
    color:#F4F2FF;background:linear-gradient(135deg,#8B5CFF,#6728F0);display:inline-flex;align-items:center;flex:0 0 auto;
  }
  body{padding-bottom:calc(56px + env(safe-area-inset-bottom))}
}
@media (max-width:479px){
  .page-hero h1{font-size:23px}
  .section-head h2{font-size:22px}
  .btn{height:46px;padding:0 20px;font-size:14.5px}
  .faq-q{font-size:15.5px}
  .faq-a-inner{font-size:16px}
}