/* roulang page: index */
:root{
  --bg:#0B0F0E; --surface:#141A18; --surface2:#1C2422;
  --line:#26302D; --line2:#33403C;
  --mint:#19E0A6; --mint-dark:#0FB183; --mint-light:#7BF3D2;
  --coral:#FF7A45;
  --txt:#E6EDEA; --txt2:#9AA9A5; --txt3:#6C7A76;
  --inv:#07110D;
  --radius-card:16px; --radius-panel:20px; --radius-pill:999px;
  --shadow-card:0 12px 32px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(25,224,166,.35);
  --ease:160ms ease-out;
  --nav-h:68px;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;background:var(--bg);color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Inter",sans-serif;
  font-size:16px;line-height:1.85;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--mint);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){.container{padding:0 24px;}}
@media (min-width:1024px){.container{padding:0 32px;}}
.num{font-variant-numeric:tabular-nums;font-family:"Inter",-apple-system,"PingFang SC",sans-serif;}
.grid-tex{
  background-image:linear-gradient(rgba(230,237,234,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(230,237,234,.055) 1px,transparent 1px);
  background-size:56px 56px;
}
/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  transition:background var(--ease),border-color var(--ease),backdrop-filter var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(11,15,14,.92);border-bottom-color:var(--line);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.nav-row{display:flex;align-items:center;gap:18px;height:var(--nav-h);}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-name{font-size:17px;font-weight:700;color:var(--txt);white-space:nowrap;letter-spacing:.01em;}
.nav-links{display:none;align-items:center;gap:26px;margin-left:12px;}
.nav-link{
  position:relative;font-size:15px;color:var(--txt2);padding:6px 0;
  transition:color var(--ease);white-space:nowrap;
}
.nav-link:hover{color:var(--txt);}
.nav-link.is-active{color:var(--mint);}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--mint);border-radius:2px;
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search-box{
  display:none;align-items:center;gap:8px;width:220px;height:40px;padding:0 14px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-pill);
  transition:border-color var(--ease),box-shadow var(--ease);
}
.search-box:focus-within{border-color:var(--mint);box-shadow:0 0 0 2px rgba(25,224,166,.18);}
.search-box input{flex:1;background:transparent;border:0;outline:none;font-size:14px;color:var(--txt);min-width:0;}
.search-box input::placeholder{color:var(--txt3);}
.search-box svg{flex-shrink:0;color:var(--txt3);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;padding:12px 24px;border-radius:var(--radius-pill);
  transition:background var(--ease),border-color var(--ease),transform var(--ease),color var(--ease);
  white-space:nowrap;border:1px solid transparent;min-height:44px;
}
.btn-primary{background:var(--mint);color:var(--inv);}
.btn-primary:hover{background:var(--mint-dark);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:var(--line2);color:var(--txt2);background:transparent;}
.btn-ghost:hover{border-color:var(--mint);color:var(--mint);transform:translateY(-1px);}
.btn-sm{padding:9px 18px;font-size:14px;min-height:40px;}
.btn-block{width:100%;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;color:var(--mint);font-size:14px;font-weight:600;
  transition:gap var(--ease),color var(--ease);
}
.link-arrow:hover{gap:10px;color:var(--mint-light);}
.burger{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--line2);border-radius:12px;color:var(--txt2);
  transition:border-color var(--ease),color var(--ease);
}
.burger:hover{border-color:var(--mint);color:var(--mint);}
@media (min-width:1024px){
  .nav-links{display:flex;}
  .search-box{display:flex;}
  .burger{display:none;}
}
@media (max-width:1023px){ .nav-cta-desktop{display:none;} }
/* drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;pointer-events:none;
  transition:opacity var(--ease);z-index:70;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);z-index:80;
  background:var(--surface);border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform 220ms ease-out;
  padding:22px 20px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-link{display:block;padding:12px 4px;font-size:16px;color:var(--txt2);border-bottom:1px solid var(--line);transition:color var(--ease);}
.drawer-link:hover,.drawer-link.is-active{color:var(--mint);}
/* ---------- hero ---------- */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;padding:calc(var(--nav-h) + 56px) 0 72px;overflow:hidden;}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:.3;}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(11,15,14,.97) 0%,rgba(11,15,14,.88) 48%,rgba(11,15,14,.6) 100%);}
.hero-tex{position:absolute;inset:0;pointer-events:none;opacity:.85;}
.hero-inner{position:relative;width:100%;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;
  color:var(--mint);background:rgba(25,224,166,.1);border:1px solid rgba(25,224,166,.35);
  border-radius:var(--radius-pill);padding:6px 14px;margin-bottom:22px;
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--mint);display:inline-block;box-shadow:0 0 0 3px rgba(25,224,166,.16);}
h1.hero-title{font-size:clamp(30px,4.4vw,52px);line-height:1.22;font-weight:800;letter-spacing:-.01em;margin-bottom:20px;}
h1.hero-title em{font-style:normal;color:var(--mint);}
.hero-sub{font-size:clamp(17px,1.6vw,20px);color:var(--txt2);line-height:1.75;max-width:600px;margin-bottom:30px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px;}
.hero-status{display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13px;color:var(--txt2);}
.hero-status span{display:inline-flex;align-items:center;gap:8px;}
.hero-figure{position:relative;border-radius:var(--radius-panel);overflow:hidden;border:1px solid var(--line2);box-shadow:var(--shadow-card);}
.hero-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero-figure figcaption{
  position:absolute;left:16px;bottom:14px;right:16px;font-size:13px;color:var(--txt2);
  background:rgba(11,15,14,.72);border:1px solid var(--line);border-radius:12px;padding:8px 12px;backdrop-filter:blur(4px);
}
.stats-4{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;margin-top:52px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
}
@media (min-width:768px){.stats-4{grid-template-columns:repeat(4,1fr);}}
.stat-cell{background:rgba(20,26,24,.86);padding:20px 22px;}
.stat-num{font-size:clamp(30px,3.4vw,44px);font-weight:800;line-height:1.1;color:var(--mint);}
.stat-label{font-size:13px;color:var(--txt2);margin-top:6px;}
/* ---------- anchor bar ---------- */
.anchor-bar{
  position:sticky;top:var(--nav-h);z-index:50;
  background:rgba(11,15,14,.93);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.anchor-scroll{display:flex;gap:8px;overflow-x:auto;padding:12px 0;scrollbar-width:none;}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-pill{
  flex:0 0 auto;font-size:14px;font-weight:600;padding:8px 18px;border-radius:var(--radius-pill);
  color:var(--txt2);border:1px solid transparent;transition:all var(--ease);
}
.anchor-pill:hover{color:var(--txt);border-color:var(--line2);}
.anchor-pill.is-active{background:var(--mint);color:var(--inv);}
/* ---------- sections ---------- */
.section{padding:56px 0;}
@media (min-width:1024px){.section{padding:104px 0;}}
.section[id]{scroll-margin-top:150px;}
.section-head{margin-bottom:34px;}
h2.sec-title{
  position:relative;font-size:clamp(24px,2.6vw,34px);line-height:1.35;font-weight:700;
  padding-left:18px;
}
h2.sec-title::before{content:"";position:absolute;left:0;top:.28em;width:4px;height:22px;background:var(--mint);border-radius:2px;}
h2.sec-title.no-bar{padding-left:0;}
h2.sec-title.no-bar::before{display:none;}
.sec-desc{color:var(--txt2);font-size:16px;max-width:780px;margin-top:14px;}
.prose-cn{max-width:780px;color:var(--txt2);}
.prose-cn p{margin-bottom:1em;}
.muted{color:var(--txt2);}
/* ---------- cards ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
  display:flex;flex-direction:column;overflow:hidden;
}
.card:hover{transform:translateY(-2px);border-color:var(--mint);box-shadow:var(--shadow-card),var(--shadow-glow);}
.card-pad{padding:22px;}
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:500;
  color:var(--mint);background:rgba(25,224,166,.1);border:1px solid rgba(25,224,166,.35);
  border-radius:999px;padding:4px 12px;white-space:nowrap;
}
.badge-coral{color:var(--coral);background:rgba(255,122,69,.1);border-color:rgba(255,122,69,.4);}
.tag{
  display:inline-flex;align-items:center;font-size:13px;color:var(--txt2);
  background:rgba(230,237,234,.03);border:1px solid var(--line);border-radius:999px;padding:7px 16px;
  transition:border-color var(--ease),color var(--ease);
}
.tag:hover{border-color:var(--mint);color:var(--mint-light);}
.clamp2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
/* bento */
.bento{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:1024px){.bento{grid-template-columns:repeat(12,1fr);}}
.bento-big{grid-column:span 12;}
.bento-sm{grid-column:span 12;}
@media (min-width:1024px){
  .bento-big{grid-column:span 8;}
  .bento-sm{grid-column:span 4;}
  .bento-sm.offset{margin-top:32px;}
}
.bento-big-inner{display:grid;gap:0;}
@media (min-width:768px){.bento-big-inner{grid-template-columns:1.05fr .95fr;}}
.bento-media{position:relative;min-height:240px;overflow:hidden;}
.bento-media img{width:100%;height:100%;object-fit:cover;min-height:240px;transition:transform 260ms ease-out;}
.card:hover .bento-media img{transform:scale(1.03);}
.point-list li{display:flex;gap:10px;align-items:flex-start;color:var(--txt2);font-size:15px;line-height:1.7;padding:7px 0;}
.point-list li svg{flex:0 0 auto;margin-top:5px;color:var(--mint);}
h3.card-title{font-size:20px;line-height:1.5;font-weight:600;color:var(--txt);margin-bottom:10px;}
/* ---------- demo / timeline ---------- */
.demo-grid{display:grid;gap:28px;align-items:center;}
@media (min-width:1024px){.demo-grid{grid-template-columns:repeat(12,1fr);gap:48px;}}
.demo-text{grid-column:span 12;}
.demo-media{grid-column:span 12;}
@media (min-width:1024px){.demo-text{grid-column:span 6;} .demo-media{grid-column:span 6;}}
.timeline{position:relative;margin:22px 0 24px;padding-left:6px;}
.timeline::before{content:"";position:absolute;left:17px;top:12px;bottom:12px;width:2px;background:linear-gradient(180deg,var(--mint),rgba(25,224,166,.12));border-radius:2px;}
.tl-item{position:relative;display:flex;gap:16px;padding:10px 0;}
.tl-num{
  flex:0 0 auto;width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;color:var(--mint);background:var(--surface2);border:1px solid var(--line2);
  position:relative;z-index:1;
}
.tl-item:hover .tl-num{border-color:var(--mint);color:var(--inv);background:var(--mint);}
.tl-body strong{display:block;font-size:16px;font-weight:600;color:var(--txt);margin-bottom:2px;}
.tl-body p{margin:0;font-size:14px;color:var(--txt2);line-height:1.7;}
.media-frame{border-radius:var(--radius-panel);overflow:hidden;border:1px solid var(--line2);box-shadow:var(--shadow-card);}
.media-frame img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.hint{font-size:14px;color:var(--txt3);margin-top:14px;}
/* ---------- evidence ---------- */
.evidence-strip{
  display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:44px;
}
@media (min-width:768px){.evidence-strip{grid-template-columns:repeat(4,1fr);}}
.evidence-cell{background:var(--bg);padding:22px 18px;text-align:center;}
.evidence-cell .num{font-size:clamp(26px,3vw,40px);font-weight:800;color:var(--mint);line-height:1.15;}
.evidence-cell .lbl{font-size:13px;color:var(--txt2);margin-top:6px;}
.quote-grid{display:grid;gap:20px;}
@media (min-width:768px){.quote-grid{grid-template-columns:repeat(2,1fr);}}
.quote-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px;}
.quote-mark{color:var(--mint);opacity:.6;margin-bottom:10px;}
.quote-card p{font-size:15px;line-height:1.75;color:var(--txt2);margin-bottom:16px;}
.stars{display:flex;gap:4px;color:var(--mint);margin-bottom:14px;}
.quote-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--txt3);}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--surface2);border:1px solid var(--line2);display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--mint);font-weight:700;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px;}
/* ---------- tiers ---------- */
.tier-list{display:flex;flex-direction:column;gap:16px;}
.tier{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-panel);
  padding:22px;display:grid;gap:18px;transition:border-color var(--ease),transform var(--ease);
}
.tier:hover{border-color:var(--line2);transform:translateY(-2px);}
@media (min-width:1024px){
  .tier{grid-template-columns:200px 1fr 240px;align-items:center;padding:26px 28px;gap:28px;}
}
.tier-featured{border-color:var(--mint);box-shadow:var(--shadow-glow);position:relative;}
.tier-name{font-size:20px;font-weight:700;color:var(--txt);}
.tier-sub{font-size:13px;color:var(--txt3);margin-top:4px;}
.tier-feats{display:grid;gap:8px;}
@media (min-width:640px){.tier-feats{grid-template-columns:repeat(2,1fr);}}
.tier-feats li{display:flex;gap:8px;align-items:flex-start;font-size:14px;color:var(--txt2);line-height:1.65;}
.tier-feats li svg{flex:0 0 auto;margin-top:4px;color:var(--mint);}
.tier-action{display:flex;flex-direction:column;gap:10px;}
.tier-price{font-size:15px;color:var(--txt);font-weight:600;}
.tier-price small{display:block;font-size:13px;color:var(--txt3);font-weight:400;margin-top:2px;}
/* ---------- posts ---------- */
.post-grid{display:grid;gap:20px;grid-template-columns:1fr;}
@media (min-width:768px){.post-grid{grid-template-columns:repeat(2,1fr);}}
@media (min-width:1024px){.post-grid{grid-template-columns:repeat(3,1fr);}}
.post-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface2);}
.post-cover img{width:100%;height:100%;object-fit:cover;transition:transform 260ms ease-out;}
.card:hover .post-cover img{transform:scale(1.03);}
.post-cover .badge{position:absolute;left:12px;top:12px;background:rgba(11,15,14,.78);backdrop-filter:blur(4px);}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.post-body h3{font-size:17px;line-height:1.5;font-weight:600;margin-bottom:8px;}
.post-body p{font-size:14px;color:var(--txt2);line-height:1.7;margin-bottom:16px;}
.post-meta{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--txt3);margin-top:auto;padding-top:12px;border-top:1px solid var(--line);}
.post-meta .link-arrow{font-size:13px;}
.empty-panel{
  border:1px dashed var(--line2);border-radius:var(--radius-panel);padding:48px 24px;text-align:center;
  background:rgba(20,26,24,.5);
}
.empty-panel p{color:var(--txt2);margin-bottom:18px;}
/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:880px;}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:border-color var(--ease);}
.faq-item:hover{border-color:var(--line2);}
.faq-item.is-open{border-color:var(--mint);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:17px;font-weight:600;text-align:left;color:var(--txt);
  transition:color var(--ease);min-height:44px;
}
.faq-q:hover{color:var(--mint-light);}
.faq-icon{flex:0 0 auto;font-size:22px;line-height:1;color:var(--mint);font-weight:400;transition:transform var(--ease);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease-out;}
.faq-a-inner{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--txt2);}
/* ---------- cta band ---------- */
.cta-band{
  position:relative;background:var(--surface2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:64px 0;text-align:center;overflow:hidden;
}
@media (min-width:1024px){.cta-band{padding:88px 0;min-height:280px;display:flex;align-items:center;}}
.cta-band .grid-tex{position:absolute;inset:0;opacity:.5;pointer-events:none;}
.cta-inner{position:relative;max-width:720px;margin:0 auto;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:26px;}
/* ---------- footer ---------- */
.site-footer{background:var(--bg);padding:56px 0 28px;border-top:1px solid var(--line);}
.footer-grid{display:grid;gap:34px;grid-template-columns:1fr;}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;}}
.footer-title{font-size:14px;font-weight:700;color:var(--txt);margin-bottom:14px;letter-spacing:.02em;}
.footer-links li{margin-bottom:9px;}
.footer-links a{font-size:14px;color:var(--txt2);transition:color var(--ease);}
.footer-links a:hover{color:var(--mint);}
.footer-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
  font-size:13px;color:var(--txt3);line-height:1.7;
}
.footer-brand-row{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
/* ---------- floating ---------- */
.float-cta{
  position:fixed;right:20px;bottom:24px;z-index:55;
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity 220ms ease-out,transform 220ms ease-out,bottom 220ms ease-out;
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta.is-lifted{bottom:40px;}
.float-desktop{display:none;align-items:center;gap:10px;padding:13px 24px;background:var(--mint);color:var(--inv);border-radius:var(--radius-pill);font-weight:600;font-size:15px;box-shadow:var(--shadow-card);transition:background var(--ease),transform var(--ease);}
.float-desktop:hover{background:var(--mint-dark);transform:translateY(-1px);}
.float-hint{max-width:0;overflow:hidden;white-space:nowrap;font-size:14px;transition:max-width 240ms ease-out;}
.float-desktop:hover .float-hint{max-width:180px;}
.float-mobile{display:flex;gap:10px;width:calc(100vw - 32px);}
.float-mobile .btn{flex:1;}
@media (min-width:1024px){
  .float-desktop{display:inline-flex;}
  .float-mobile{display:none;}
  .float-cta{right:28px;}
}
.to-top{
  position:fixed;right:20px;bottom:96px;z-index:54;width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line2);color:var(--txt2);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity 220ms ease-out,transform 220ms ease-out,bottom 220ms ease-out,border-color var(--ease),color var(--ease);
}
.to-top.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.to-top:hover{border-color:var(--mint);color:var(--mint);}
.to-top.is-lifted{bottom:112px;}
@media (min-width:1024px){.to-top{right:28px;}}
/* reveal */
.reveal{opacity:0;transform:translateY(18px);transition:opacity 520ms ease-out,transform 520ms ease-out;}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}
@media (max-width:767px){
  .timeline{display:flex;gap:12px;overflow-x:auto;padding-bottom:8px;scrollbar-width:none;}
  .timeline::-webkit-scrollbar{display:none;}
  .timeline::before{display:none;}
  .tl-item{flex:0 0 78%;flex-direction:column;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:14px;}
}

/* roulang page: category1 */
:root{
  --bg:#0B0F0E;
  --surface-1:#141A18;
  --surface-2:#1C2422;
  --line:#26302D;
  --line-strong:#33403C;
  --primary:#19E0A6;
  --primary-dark:#0FB183;
  --primary-light:#7BF3D2;
  --accent:#FF7A45;
  --text:#E6EDEA;
  --text-2:#9AA9A5;
  --text-3:#6C7A76;
  --radius-card:16px;
  --radius-panel:20px;
  --radius-pill:999px;
  --shadow-card:0 12px 32px rgba(0,0,0,.45);
  --container:1200px;
  --nav-h:72px;
}
*,*::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:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",Inter,Arial,sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;height:auto}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.muted{color:var(--text-2)}
.weak{color:var(--text-3)}

/* header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:70;border-bottom:1px solid transparent;transition:background .2s ease,border-color .2s ease,backdrop-filter .2s ease}
.site-header.is-scrolled{background:rgba(11,15,14,.9);backdrop-filter:blur(6px);border-bottom-color:var(--line)}
.nav-row{display:flex;align-items:center;gap:20px;height:var(--nav-h)}
.brand{display:flex;align-items:center;gap:10px;min-height:44px;flex:0 0 auto}
.brand-name{font-size:17px;font-weight:700;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:18px;flex:1 1 auto;justify-content:center}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--text-2);padding:8px 2px;min-height:44px;display:inline-flex;align-items:center;transition:color .16s ease}
.nav-link:hover{color:var(--text)}
.nav-link.is-active{color:var(--primary)}
.nav-link.is-active::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:2px;background:var(--primary);border-radius:2px}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto;margin-left:auto}
.search-box{display:flex;align-items:center;gap:8px;width:220px;height:40px;padding:0 14px;background:var(--surface-1);border:1px solid var(--line);border-radius:var(--radius-pill);color:var(--text-3);transition:border-color .16s ease,box-shadow .16s ease}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 2px rgba(25,224,166,.2)}
.search-box input{width:100%;border:0;outline:0;background:transparent;font-size:14px;color:var(--text)}
.search-box input::placeholder{color:var(--text-3)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 24px;border-radius:var(--radius-pill);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background .16s ease,border-color .16s ease,transform .16s ease,color .16s ease;white-space:nowrap}
.btn-sm{min-height:40px;padding:8px 18px;font-size:14px}
.btn-primary{background:var(--primary);color:#07110D}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
.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);color:var(--primary-light);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.burger{display:none;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);background:transparent;color:var(--text);cursor:pointer}
.burger:hover{border-color:var(--primary);color:var(--primary)}

/* drawer */
.drawer-mask{position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;z-index:80}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);background:var(--surface-1);border-left:1px solid var(--line);z-index:90;transform:translateX(102%);transition:transform .22s ease;padding:22px;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;gap:12px}
.drawer-title{font-size:15px;font-weight:700}
.drawer-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--line-strong);background:transparent;color:var(--text);cursor:pointer}
.drawer-close:hover{border-color:var(--primary);color:var(--primary)}
.drawer-links{display:flex;flex-direction:column;gap:4px;border-top:1px solid var(--line);padding-top:12px}
.drawer-links a{display:flex;align-items:center;min-height:44px;font-size:15px;color:var(--text-2);border-radius:10px;padding:0 10px}
.drawer-links a:hover{background:var(--surface-2);color:var(--text)}
.drawer-links a.is-active{color:var(--primary)}
.drawer-foot{display:flex;flex-direction:column;gap:10px;margin-top:auto}
.drawer-foot .btn{width:100%}

/* hero */
.page-hero{position:relative;padding:calc(var(--nav-h) + 56px) 0 64px;border-bottom:1px solid var(--line);overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:.2}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,15,14,.72) 0%,rgba(11,15,14,.94) 72%,var(--bg) 100%)}
.hero-inner{position:relative;z-index:2;max-width:880px}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);margin-bottom:20px;flex-wrap:wrap}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--primary-light)}
.crumb-sep{color:var(--text-3)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:500;color:var(--primary);background:rgba(25,224,166,.1);border:1px solid rgba(25,224,166,.45);border-radius:var(--radius-pill);padding:5px 14px;margin-bottom:18px}
.hero-title{font-size:clamp(30px,4.4vw,50px);line-height:1.22;font-weight:800;max-width:820px}
.hero-sub{font-size:19px;color:var(--text-2);max-width:720px;margin-top:18px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.status-row{display:flex;flex-wrap:wrap;gap:22px;margin-top:28px;font-size:13px;color:var(--text-2)}
.status-row li{display:flex;align-items:center;gap:8px}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 4px rgba(25,224,166,.16);display:inline-block}

/* stat strip */
.stat-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--surface-1)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat-item{padding:26px 20px;border-right:1px solid var(--line)}
.stat-item:last-child{border-right:0}
.stat-num{font-size:clamp(30px,3vw,42px);font-weight:800;color:var(--primary);font-variant-numeric:tabular-nums;line-height:1.1}
.stat-label{font-size:13px;color:var(--text-2);margin-top:6px}

/* sections */
.section{padding:96px 0}
.section-alt{background:var(--surface-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:800px;margin-bottom:44px}
.section-title{position:relative;font-size:clamp(24px,2.6vw,34px);font-weight:700;padding-left:16px}
.section-title::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;border-radius:3px;background:var(--primary)}
.section-lead{color:var(--text-2);margin-top:14px;font-size:16px;max-width:780px}

/* media rows */
.media-row{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center;margin-bottom:72px}
.media-row:last-child{margin-bottom:0}
.media-text{grid-column:span 6}
.media-figure{grid-column:span 6}
.media-row.reverse .media-text{order:2}
.media-row.reverse .media-figure{order:1}
.media-text h3{font-size:21px;font-weight:600;margin-bottom:12px}
.media-text p{color:var(--text-2);font-size:16px;max-width:640px}
.figure-frame{position:relative;aspect-ratio:16/9;border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;background:var(--surface-2)}
.figure-frame img{width:100%;height:100%;object-fit:cover;transition:transform .16s ease-out}
.figure-frame:hover img{transform:scale(1.03)}
.figure-frame:hover{border-color:var(--primary)}
.tip-line{display:flex;gap:10px;align-items:flex-start;margin-top:16px;padding:14px 16px;background:var(--surface-1);border:1px solid var(--line);border-radius:12px;font-size:14px;color:var(--text-2)}
.tip-line strong{color:var(--primary-light);font-weight:600}
.check-list{margin-top:16px;display:flex;flex-direction:column;gap:8px}
.check-list li{position:relative;padding-left:20px;font-size:15px;color:var(--text-2)}
.check-list li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;background:var(--primary)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;margin-top:18px;color:var(--primary);font-size:15px;font-weight:600;min-height:44px}
.link-arrow svg{transition:transform .16s ease}
.link-arrow:hover{color:var(--primary-light)}
.link-arrow:hover svg{transform:translateX(4px)}

/* steps */
.steps{position:relative;max-width:820px}
.step{position:relative;padding:0 0 34px 62px}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:19px;top:40px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--primary),rgba(25,224,166,.15))}
.step:last-child::before{display:none}
.step-index{position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;border:1px solid var(--primary);background:rgba(25,224,166,.1);color:var(--primary);font-weight:700;display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums}
.step h3{font-size:19px;font-weight:600;margin-top:6px}
.step p{color:var(--text-2);font-size:15px;margin:8px 0 0;max-width:660px}

/* cards */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{background:var(--surface-1);border:1px solid var(--line);border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-card);transition:transform .16s ease-out,border-color .16s ease-out,box-shadow .16s ease-out;display:flex;flex-direction:column;gap:10px}
.card:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:var(--shadow-card),0 0 0 1px rgba(25,224,166,.35)}
.card-icon{width:40px;height:40px;border-radius:12px;border:1px solid rgba(25,224,166,.45);background:rgba(25,224,166,.1);display:flex;align-items:center;justify-content:center;color:var(--primary)}
.card h3{font-size:19px;font-weight:600}
.card p{font-size:15px;color:var(--text-2);margin:0}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:500;color:var(--primary);background:rgba(25,224,166,.1);border:1px solid rgba(25,224,166,.45);border-radius:8px;padding:3px 10px;width:fit-content}

/* faq */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px}
.faq-item{background:var(--surface-1);border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;transition:border-color .16s ease}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item[open]{border-color:rgba(25,224,166,.45)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 22px;min-height:44px;cursor:pointer;font-size:17px;font-weight:600;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-mark{position:relative;width:18px;height:18px;flex:0 0 18px}
.faq-mark::before,.faq-mark::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .18s ease,opacity .18s ease}
.faq-mark::before{left:0;top:8px;width:18px;height:2px}
.faq-mark::after{left:8px;top:0;width:2px;height:18px}
.faq-item[open] .faq-mark::after{transform:scaleY(0);opacity:0}
.faq-body{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:760px}
.faq-body a{color:var(--primary);border-bottom:1px dashed rgba(25,224,166,.6)}
.faq-body a:hover{color:var(--primary-light)}

/* cta band */
.cta-band{position:relative;background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:88px 0;overflow:hidden;text-align:center}
.cta-band::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:44px 44px}
.cta-inner{position:relative;z-index:2;max-width:760px;margin:0 auto}
.cta-inner h2{font-size:clamp(24px,2.6vw,32px);font-weight:700}
.cta-inner p{color:var(--text-2);margin:16px 0 28px}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px}

/* footer */
.site-footer{background:var(--bg);border-top:1px solid var(--line);padding:72px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand-row{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-title{font-size:15px;font-weight:700;margin-bottom:14px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .16s ease}
.footer-links a:hover{color:var(--primary)}
.footer-bottom{margin-top:48px;padding-top:22px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--text-3)}

/* float cta & to top */
.float-cta{position:fixed;right:28px;bottom:28px;z-index:60;display:flex;gap:10px;align-items:center;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .2s ease,transform .2s ease,visibility .2s ease}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.float-sub{display:none}
.to-top{position:fixed;right:28px;bottom:96px;z-index:59;width:44px;height:44px;border-radius:50%;border:1px solid var(--line-strong);background:rgba(20,26,24,.9);color:var(--text-2);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease,border-color .16s ease,color .16s ease}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{border-color:var(--primary);color:var(--primary)}

@media (max-width:1024px){
  .container{padding:0 24px}
  .nav-links{display:none}
  .burger{display:inline-flex}
  .nav-cta-desktop{display:none}
  .search-box{width:180px}
  .media-text,.media-figure{grid-column:span 12}
  .media-row.reverse .media-text{order:1}
  .media-row.reverse .media-figure{order:2}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
  body{font-size:16px}
  .section{padding:64px 0}
  .stat-grid{grid-template-columns:1fr 1fr}
  .stat-item:nth-child(2){border-right:0}
  .stat-item:nth-child(1),.stat-item:nth-child(2){border-bottom:1px solid var(--line)}
  .card-grid{grid-template-columns:1fr}
  .media-row{margin-bottom:48px}
  .float-cta{left:0;right:0;bottom:0;padding:12px 16px;background:rgba(11,15,14,.96);border-top:1px solid var(--line);gap:12px}
  .float-cta .float-main{flex:1 1 auto;display:inline-flex;justify-content:center;align-items:center;min-height:46px;border-radius:var(--radius-pill);background:var(--primary);color:#07110D;font-weight:600;font-size:15px}
  .float-cta .float-sub{flex:0 0 auto;display:inline-flex;justify-content:center;align-items:center;min-height:46px;padding:0 18px;border-radius:var(--radius-pill);border:1px solid var(--line-strong);color:var(--text);font-size:15px}
  .to-top{display:none}
  .cta-band{padding:64px 0}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .search-box{display:none}
  .hero-sub{font-size:17px}
  .step{padding-left:52px}
  .step::before{left:17px}
  .step-index{width:36px;height:36px;font-size:14px}
}

/* roulang page: article */
:root{
    --bg:#0B0F0E;
    --surface-1:#141A18;
    --surface-2:#1C2422;
    --line:#26302D;
    --line-strong:#33403C;
    --primary:#19E0A6;
    --primary-dark:#0FB183;
    --primary-light:#7BF3D2;
    --accent:#FF7A45;
    --text:#E6EDEA;
    --text-2:#9AA9A5;
    --text-3:#6C7A76;
    --on-primary:#07110D;
    --success:#34D399;
    --warn:#F5B942;
    --danger:#F2555A;
    --r-card:16px;
    --r-panel:20px;
    --r-field:12px;
    --r-pill:999px;
    --r-badge:8px;
    --shadow:0 12px 32px rgba(0,0,0,.45);
    --container:1200px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",Inter,sans-serif;
    font-size:16px;
    line-height:1.85;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-style:none}
  a{color:inherit;text-decoration:none;transition:color .16s ease-out,border-color .16s ease-out,background-color .16s ease-out}
  button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
  input{font:inherit}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0}
  ul,ol{list-style:none;padding:0}
  :focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
  .muted{color:var(--text-2)}

  .container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
  @media (max-width:1024px){.container{padding:0 24px}}
  @media (max-width:768px){.container{padding:0 20px}}

  /* ============ 导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:transparent;
    border-bottom:1px solid transparent;
    transition:background .22s ease-out,border-color .22s ease-out,backdrop-filter .22s ease-out;
  }
  .site-header.is-scrolled{
    background:rgba(11,15,14,.92);
    -webkit-backdrop-filter:blur(6px);
    backdrop-filter:blur(6px);
    border-bottom-color:var(--line);
  }
  .nav-row{display:flex;align-items:center;gap:26px;height:72px}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-name{font-size:17px;font-weight:700;white-space:nowrap;letter-spacing:-.01em}
  .nav-links{display:flex;align-items:center;gap:18px;margin-left:6px}
  .nav-link{
    font-size:15px;color:var(--text-2);padding:6px 2px;
    border-bottom:2px solid transparent;white-space:nowrap;
  }
  .nav-link:hover{color:var(--text)}
  .nav-link.is-active{color:var(--primary);border-bottom-color:var(--primary)}
  .nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
  .search-box{
    display:flex;align-items:center;gap:8px;
    width:220px;height:40px;padding:0 14px;
    background:var(--surface-1);
    border:1px solid var(--line);
    border-radius:var(--r-pill);
    color:var(--text-3);
    transition:border-color .16s ease-out,box-shadow .16s ease-out;
  }
  .search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 2px rgba(25,224,166,.18)}
  .search-box input{flex:1;min-width:0;background:none;border:none;outline:none;color:var(--text);font-size:13.5px}
  .search-box input::placeholder{color:var(--text-3)}

  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:12px 24px;
    border-radius:var(--r-pill);
    border:1px solid transparent;
    font-size:15px;font-weight:600;line-height:1;
    transition:transform .16s ease-out,background-color .16s ease-out,color .16s ease-out,border-color .16s ease-out;
  }
  .btn-sm{min-height:38px;padding:9px 18px;font-size:14px}
  .btn-primary{background:var(--primary);color:var(--on-primary)}
  .btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{border-color:var(--line-strong);color:var(--text)}
  .btn-ghost:hover{border-color:var(--primary);color:var(--primary-light);transform:translateY(-1px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600}
  .btn-text svg{transition:transform .16s ease-out}
  .btn-text:hover{color:var(--primary-light)}
  .btn-text:hover svg{transform:translateX(4px)}

  .burger{
    display:none;width:44px;height:44px;align-items:center;justify-content:center;
    border:1px solid var(--line-strong);border-radius:12px;color:var(--text);
    transition:border-color .16s ease-out,color .16s ease-out;
  }
  .burger:hover{border-color:var(--primary);color:var(--primary)}

  @media (max-width:1023px){
    .nav-links{display:none}
    .nav-right .search-box{display:none}
    .nav-cta-desktop{display:none}
    .burger{display:inline-flex}
    .nav-row{gap:14px;height:66px}
    .brand-name{font-size:15.5px}
  }
  @media (max-width:420px){
    .brand-name{max-width:150px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  }

  /* ============ 抽屉 ============ */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:70;
    opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s ease-out;
  }
  .drawer-mask.is-open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;z-index:80;
    width:322px;max-width:86vw;height:100%;
    background:var(--surface-1);
    border-left:1px solid var(--line);
    padding:22px 20px 28px;
    display:flex;flex-direction:column;gap:18px;overflow-y:auto;
    transform:translateX(100%);
    transition:transform .28s ease-out;
  }
  .drawer.is-open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between}
  .drawer-title{font-size:14px;font-weight:700;color:var(--text-2);letter-spacing:.06em}
  .drawer-close{
    width:40px;height:40px;display:flex;align-items:center;justify-content:center;
    border:1px solid var(--line-strong);border-radius:12px;color:var(--text-2);font-size:20px;line-height:1;
  }
  .drawer-close:hover{border-color:var(--primary);color:var(--primary)}
  .drawer .search-box{width:100%}
  .drawer-links{display:flex;flex-direction:column;gap:2px}
  .drawer-link{
    display:flex;align-items:center;min-height:46px;padding:0 12px;
    border-radius:12px;font-size:15px;color:var(--text-2);
  }
  .drawer-link:hover{background:var(--surface-2);color:var(--text)}
  .drawer-link.is-active{color:var(--primary);background:rgba(25,224,166,.08)}
  .drawer-actions{margin-top:auto;display:flex;flex-direction:column;gap:10px}
  .drawer-actions .btn{width:100%}

  /* ============ 文章头部 ============ */
  .article-hero{
    background:linear-gradient(180deg,rgba(25,224,166,.08),rgba(25,224,166,0) 82%),var(--bg);
    border-bottom:1px solid var(--line);
    padding:36px 0 40px;
  }
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2)}
  .breadcrumb a{color:var(--text-2)}
  .breadcrumb a:hover{color:var(--primary-light)}
  .breadcrumb .sep{color:var(--text-3)}
  .breadcrumb .current{
    color:var(--text-3);max-width:58ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  }
  .article-title{
    font-size:clamp(26px,3vw,40px);
    line-height:1.28;
    font-weight:800;
    letter-spacing:-.01em;
    max-width:900px;
    margin:20px 0 18px;
  }
  .meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:14px;color:var(--text-2)}
  .meta-row .dot{color:var(--text-3)}
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:4px 12px;border-radius:var(--r-badge);
    border:1px solid rgba(25,224,166,.45);
    background:rgba(25,224,166,.1);
    color:var(--primary-light);
    font-size:12px;font-weight:500;line-height:1.7;white-space:nowrap;
  }

  /* ============ 正文布局 ============ */
  .article-layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 260px;
    gap:48px;
    align-items:start;
    padding:56px 0 84px;
  }
  .article-body{max-width:780px;width:100%}

  .article-side{position:sticky;top:96px}
  .toc-card{
    display:none;
    background:var(--surface-1);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:18px;
    box-shadow:var(--shadow);
  }
  .toc-card.is-ready{display:block}
  .toc-title{font-size:12.5px;font-weight:700;color:var(--text-3);letter-spacing:.1em;margin-bottom:12px}
  .toc-list{display:flex;flex-direction:column;gap:2px;max-height:58vh;overflow-y:auto}
  .toc-list a{
    display:block;padding:7px 10px;
    font-size:13.5px;line-height:1.6;color:var(--text-2);
    border-left:2px solid var(--line);
    border-radius:0 8px 8px 0;
  }
  .toc-list a:hover{color:var(--text);background:var(--surface-2)}
  .toc-list a.is-current{color:var(--primary);border-left-color:var(--primary);background:rgba(25,224,166,.08)}

  .toc-mobile{
    display:none;
    background:var(--surface-1);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    margin-bottom:30px;
    overflow:hidden;
  }
  .toc-mobile summary{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 18px;font-size:15px;font-weight:600;cursor:pointer;list-style:none;
  }
  .toc-mobile summary::-webkit-details-marker{display:none}
  .toc-mobile summary::after{content:"＋";color:var(--primary);font-size:16px;line-height:1}
  .toc-mobile[open] summary::after{content:"－"}
  .toc-mobile .toc-list{padding:0 12px 16px}

  @media (max-width:1279px){
    .article-side{display:none}
    .article-layout{grid-template-columns:minmax(0,1fr);gap:0;padding:44px 0 68px}
    .toc-mobile.is-ready{display:block}
  }
  @media (max-width:768px){
    .article-hero{padding:26px 0 30px}
    .article-layout{padding:36px 0 56px}
  }

  /* ============ 长文排版 ============ */
  .prose{font-size:17px;line-height:1.85;color:var(--text)}
  .prose > *:first-child{margin-top:0}
  .prose p{margin:0 0 1em}
  .prose strong{color:#fff;font-weight:700}
  .prose h2{
    position:relative;
    font-size:clamp(22px,2.3vw,28px);
    line-height:1.4;font-weight:700;
    margin:40px 0 16px;padding-left:14px;
    scroll-margin-top:104px;
  }
  .prose h2::before{
    content:"";position:absolute;left:0;top:.34em;
    width:4px;height:22px;border-radius:2px;background:var(--primary);
  }
  .prose h3{font-size:20px;line-height:1.5;font-weight:600;margin:28px 0 12px;scroll-margin-top:104px}
  .prose h4{font-size:17px;font-weight:600;margin:22px 0 10px}
  .prose ul{margin:0 0 1em}
  .prose ul li{position:relative;padding-left:22px;margin-bottom:8px}
  .prose ul li::before{
    content:"";position:absolute;left:2px;top:.72em;
    width:7px;height:7px;border-radius:2px;background:var(--primary);transform:translateY(-50%);
  }
  .prose ol{counter-reset:prose-li;margin:0 0 1em}
  .prose ol li{position:relative;padding-left:32px;margin-bottom:10px;counter-increment:prose-li}
  .prose ol li::before{
    content:counter(prose-li);
    position:absolute;left:0;top:.3em;
    width:21px;height:21px;border-radius:50%;
    background:rgba(25,224,166,.14);color:var(--primary);
    font-size:12px;font-weight:700;line-height:21px;text-align:center;
  }
  .prose blockquote{
    margin:20px 0;padding:20px 22px;
    background:var(--surface-1);
    border-left:3px solid var(--primary);
    border-radius:0 12px 12px 0;
    color:var(--text-2);
  }
  .prose blockquote p:last-child{margin-bottom:0}
  .prose img{width:100%;height:auto;border-radius:12px;border:1px solid var(--line);margin:22px 0 10px}
  .prose figcaption{font-size:14px;color:var(--text-3);text-align:center;margin:0 0 22px}
  .prose a{color:var(--primary);text-decoration:underline;text-decoration-style:dashed;text-underline-offset:4px}
  .prose a:hover{color:var(--primary-light)}
  .prose table{
    width:100%;border-collapse:collapse;font-size:15px;line-height:1.7;margin:22px 0;
  }
  .prose table th{
    background:var(--surface-2);border:1px solid var(--line);
    padding:11px 14px;text-align:left;font-weight:600;color:var(--text);
  }
  .prose table td{border:1px solid var(--line);padding:11px 14px;color:var(--text-2)}
  .prose code{background:var(--surface-2);padding:2px 6px;border-radius:6px;font-size:.92em;color:var(--primary-light)}
  .prose hr{border:none;border-top:1px solid var(--line);margin:34px 0}
  .prose > table{display:block;overflow-x:auto}

  /* ============ 空状态 ============ */
  .empty-state{
    border:1px dashed var(--line-strong);
    border-radius:var(--r-panel);
    background:var(--surface-1);
    padding:58px 26px;
    text-align:center;
  }
  .empty-state h2{font-size:22px;font-weight:700;margin-bottom:10px}
  .empty-state p{color:var(--text-2);font-size:15px;margin:0 auto 24px;max-width:440px}

  /* ============ 相关推荐 ============ */
  .rel-section{margin-top:60px;padding-top:34px;border-top:1px solid var(--line)}
  .rel-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px}
  .rel-head h2{font-size:22px;font-weight:700;line-height:1.4;position:relative;padding-left:14px}
  .rel-head h2::before{
    content:"";position:absolute;left:0;top:.34em;width:4px;height:20px;border-radius:2px;background:var(--primary);
  }
  .rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:22px}
  .rel-card{
    display:flex;flex-direction:column;
    background:var(--surface-1);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    overflow:hidden;
    transition:transform .16s ease-out,border-color .16s ease-out,box-shadow .16s ease-out;
  }
  .rel-card:hover{
    transform:translateY(-2px);
    border-color:var(--primary);
    box-shadow:0 0 0 1px rgba(25,224,166,.35),var(--shadow);
  }
  .rel-thumb{position:relative;aspect-ratio:16/9;background:var(--surface-2);overflow:hidden}
  .rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .18s ease-out}
  .rel-card:hover .rel-thumb img{transform:scale(1.03)}
  .rel-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:10px;flex:1}
  .rel-body h3{
    font-size:16px;line-height:1.5;font-weight:600;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .rel-meta{font-size:13px;color:var(--text-3);margin-top:auto}
  @media (max-width:900px){
    .rel-grid{
      display:flex;overflow-x:auto;gap:16px;margin-top:20px;padding-bottom:10px;
      scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
    }
    .rel-grid::-webkit-scrollbar{height:6px}
    .rel-grid::-webkit-scrollbar-thumb{background:var(--line-strong);border-radius:99px}
    .rel-card{min-width:262px;scroll-snap-align:start}
  }

  /* ============ 翻页 ============ */
  .pager{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:34px}
  .pager a{
    display:block;padding:18px 20px;
    border:1px solid var(--line-strong);
    border-radius:var(--r-card);
    transition:border-color .16s ease-out,background-color .16s ease-out,transform .16s ease-out;
  }
  .pager a:hover{border-color:var(--primary);background:var(--surface-1);transform:translateY(-2px)}
  .pager .pg-label{display:block;font-size:13px;color:var(--text-3);margin-bottom:6px}
  .pager .pg-title{display:block;font-size:15px;font-weight:600;line-height:1.6}
  .back-row{margin-top:20px;display:flex;flex-wrap:wrap;gap:12px}
  @media (max-width:640px){.pager{grid-template-columns:1fr}}

  /* ============ 底部 CTA ============ */
  .cta-band{
    position:relative;
    background:var(--surface-2);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    padding:78px 0;
    overflow:hidden;
    text-align:center;
  }
  .cta-band::after{
    content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
    background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
    background-size:48px 48px;
  }
  .cta-inner{position:relative;z-index:1;max-width:720px;margin:0 auto}
  .cta-band h2{font-size:clamp(24px,2.6vw,34px);line-height:1.35;font-weight:700;margin-bottom:14px}
  .cta-band p{color:var(--text-2);font-size:16px;margin-bottom:26px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--bg);border-top:1px solid var(--line);padding:64px 0 28px}
  .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
  .footer-brand-row{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-title{font-size:14px;font-weight:700;margin-bottom:14px}
  .footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px}
  .footer-links a{color:var(--text-2)}
  .footer-links a:hover{color:var(--primary)}
  .footer-bottom{
    margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
    font-size:13px;color:var(--text-3);line-height:1.8;
  }
  @media (max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
  @media (max-width:560px){
    .site-footer{padding:48px 0 24px}
    .footer-grid{grid-template-columns:1fr}
  }

  /* ============ 浮动组件 ============ */
  .float-cta{
    position:fixed;right:24px;bottom:32px;z-index:56;
    display:inline-flex;align-items:center;gap:8px;
    max-width:180px;padding:12px 20px;
    border-radius:var(--r-pill);
    background:var(--primary);color:var(--on-primary);
    font-size:14px;font-weight:600;line-height:1;
    box-shadow:var(--shadow);
    opacity:0;visibility:hidden;transform:translateY(10px);
    transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s ease-out,background-color .16s ease-out;
  }
  .float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0)}
  .float-cta:hover{background:var(--primary-dark)}
  .float-cta.is-icon-only{padding:12px;width:48px;max-width:48px;justify-content:center}
  .float-cta.is-icon-only .float-cta-text{display:none}

  .to-top{
    position:fixed;right:24px;bottom:96px;z-index:55;
    width:44px;height:44px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:var(--surface-2);border:1px solid var(--line-strong);color:var(--text-2);
    opacity:0;visibility:hidden;transform:translateY(8px);
    transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s ease-out,border-color .16s ease-out,color .16s ease-out;
  }
  .to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
  .to-top:hover{border-color:var(--primary);color:var(--primary)}

  @media (max-width:768px){
    .float-cta{right:16px;bottom:18px;max-width:180px;padding:11px 16px;font-size:13.5px}
    .float-cta.is-icon-only{padding:12px;width:48px;max-width:48px}
    .to-top{right:16px;bottom:78px}
  }

/* roulang page: category2 */
:root{
  --bg:#0B0F0E;
  --surface-1:#141A18;
  --surface-2:#1C2422;
  --line:#26302D;
  --line-strong:#33403C;
  --primary:#19E0A6;
  --primary-dark:#0FB183;
  --primary-light:#7BF3D2;
  --accent:#FF7A45;
  --text:#E6EDEA;
  --text-2:#9AA9A5;
  --text-3:#6C7A76;
  --success:#34D399;
  --warning:#F5B942;
  --danger:#F2555A;
  --radius-card:16px;
  --radius-panel:20px;
  --radius-input:12px;
  --radius-pill:999px;
  --shadow-card:0 12px 32px rgba(0,0,0,.45);
  --shell:1200px;
  --font-cn:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",Inter,Arial,sans-serif;
}

*,*::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-cn);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -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;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
::selection{background:rgba(25,224,166,.25);}

.container{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 32px;
}
@media (max-width:1024px){.container{padding:0 24px;}}
@media (max-width:640px){.container{padding:0 20px;}}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--radius-pill);
  padding:12px 24px;
  min-height:44px;
  transition:background .16s ease-out,color .16s ease-out,border-color .16s ease-out,transform .16s ease-out;
  white-space:nowrap;
}
.btn-primary{
  background:var(--primary);
  color:#07110D;
  border:1px solid var(--primary);
}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;
  color:var(--text);
  border:1px solid var(--line-strong);
}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{padding:9px 18px;font-size:14px;min-height:40px;}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--primary);
  font-size:14px;
  font-weight:500;
  transition:color .16s ease-out;
}
.link-arrow svg{transition:transform .16s ease-out;}
.link-arrow:hover{color:var(--primary-light);}
.link-arrow:hover svg{transform:translateX(4px);}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(25,224,166,.55);
  background:rgba(25,224,166,.1);
  color:var(--primary);
  font-size:12px;
  font-weight:500;
  padding:4px 12px;
  line-height:1.6;
}
.badge-accent{
  border-color:rgba(255,122,69,.55);
  background:rgba(255,122,69,.1);
  color:var(--accent);
}
.eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:var(--primary);
}
.muted{color:var(--text-2);}
.weak{color:var(--text-3);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .22s ease-out,border-color .22s ease-out,backdrop-filter .22s ease-out;
}
.site-header.is-scrolled{
  background:rgba(11,15,14,.9);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  border-bottom-color:var(--line);
}
.nav-row{
  display:flex;
  align-items:center;
  gap:24px;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-name{color:var(--text);}
.nav-links{
  display:flex;
  align-items:center;
  gap:18px;
  flex:1;
  justify-content:center;
}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--text-2);
  padding:6px 2px;
  border-bottom:2px solid transparent;
  transition:color .16s ease-out,border-color .16s ease-out;
}
.nav-link:hover{color:var(--text);}
.nav-link.is-active{color:var(--primary);border-bottom-color:var(--primary);}
.nav-right{
  display:flex;
  align-items:center;
  gap:12px;
}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  width:220px;
  height:40px;
  padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:var(--surface-1);
  color:var(--text-3);
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.search-box:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 2px rgba(25,224,166,.22);
}
.search-box input{
  flex:1;
  min-width:0;
  border:0;
  background:transparent;
  outline:none;
  font-size:14px;
  color:var(--text);
}
.search-box input::placeholder{color:var(--text-3);}
.burger{
  display:none;
  align-items:center;
  justify-content:center;
  width:44px;height:44px;
  border:1px solid var(--line-strong);
  border-radius:12px;
  color:var(--text);
}
.burger:hover{border-color:var(--primary);color:var(--primary);}

/* 抽屉 */
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.6);
  opacity:0;
  pointer-events:none;
  transition:opacity .22s ease-out;
  z-index:70;
}
.drawer-mask.is-open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;
  top:0;right:0;bottom:0;
  width:min(84vw,340px);
  background:var(--surface-1);
  border-left:1px solid var(--line);
  z-index:80;
  transform:translateX(100%);
  transition:transform .26s ease-out;
  padding:24px 22px;
  overflow-y:auto;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.drawer-close{
  width:40px;height:40px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);
  border-radius:12px;
}
.drawer-close:hover{border-color:var(--primary);color:var(--primary);}
.drawer-links{display:flex;flex-direction:column;gap:4px;}
.drawer-links a{
  padding:12px 4px;
  font-size:16px;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.drawer-links a:hover,.drawer-links a.is-active{color:var(--primary);}
.drawer-search{
  display:flex;align-items:center;gap:8px;
  height:44px;padding:0 14px;
  border:1px solid var(--line);
  border-radius:var(--radius-input);
  background:var(--surface-2);
  color:var(--text-3);
}
.drawer-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--text);
}
.drawer-actions{display:flex;flex-direction:column;gap:10px;margin-top:auto;}

@media (max-width:1023px){
  .nav-links{display:none;}
  .search-box{display:none;}
  .nav-cta-desktop{display:none;}
  .burger{display:inline-flex;}
  .nav-right{margin-left:auto;}
}
@media (max-width:520px){
  .brand-name{font-size:15px;}
  .nav-row{height:64px;gap:12px;}
}

/* ---------- 页面主体 ---------- */
main{padding-top:72px;}
@media (max-width:520px){main{padding-top:64px;}}

.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-3);
  padding:24px 0 0;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-2);transition:color .16s ease-out;}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--line-strong);}
.breadcrumb .current{color:var(--text-2);}

.page-hero{
  position:relative;
  padding:28px 0 56px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(25,224,166,.09),rgba(11,15,14,0) 72%),
    var(--bg);
}
.page-hero .grid-texture{
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.65) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.65) 1px,transparent 1px);
  background-size:34px 34px;
  opacity:.055;
  pointer-events:none;
}
.page-hero .hero-media{
  position:absolute;
  right:-60px;
  top:-40px;
  width:520px;
  max-width:none;
  opacity:.16;
  filter:saturate(.8);
  pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,1fr) 240px;
  gap:40px;
  align-items:end;
}
h1{
  font-size:clamp(30px,4.4vw,50px);
  line-height:1.22;
  font-weight:800;
  letter-spacing:-.01em;
  margin:14px 0 16px;
  max-width:820px;
}
.hero-lead{
  max-width:780px;
  font-size:17px;
  color:var(--text-2);
  line-height:1.85;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:26px;
}
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:24px;align-items:start;}
  .hero-media{display:none;}
}
@media (max-width:640px){
  .page-hero{padding-bottom:44px;}
  .hero-actions .btn{width:100%;}
}

/* 数据条 */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  border:1px solid var(--line);
  border-radius:var(--radius-panel);
  background:var(--surface-1);
  overflow:hidden;
  margin-top:-30px;
  position:relative;
  z-index:5;
  box-shadow:var(--shadow-card);
}
.stat-cell{
  padding:22px 24px;
  border-right:1px solid var(--line);
}
.stat-cell:last-child{border-right:0;}
.stat-num{
  font-size:clamp(26px,3vw,34px);
  font-weight:800;
  color:var(--primary);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.01em;
  line-height:1.3;
}
.stat-label{
  font-size:13px;
  color:var(--text-2);
  margin-top:4px;
}
@media (max-width:768px){
  .stat-strip{grid-template-columns:1fr;margin-top:24px;}
  .stat-cell{border-right:0;border-bottom:1px solid var(--line);}
  .stat-cell:last-child{border-bottom:0;}
}

/* 板块 */
.section{padding:96px 0;}
.section-tight{padding:72px 0;}
@media (max-width:1024px){.section{padding:80px 0;}}
@media (max-width:640px){.section{padding:56px 0;}.section-tight{padding:52px 0;}}

.section-head{max-width:780px;margin-bottom:44px;}
h2{
  position:relative;
  font-size:clamp(24px,2.6vw,34px);
  line-height:1.35;
  font-weight:700;
  padding-left:16px;
  margin-bottom:14px;
}
h2::before{
  content:"";
  position:absolute;
  left:0;top:.28em;
  width:4px;height:22px;
  border-radius:2px;
  background:var(--primary);
}
.section-head p{color:var(--text-2);font-size:16px;}

/* 卡片网格 */
.grid-cards{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
@media (max-width:1024px){.grid-cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}}
@media (max-width:640px){.grid-cards{grid-template-columns:1fr;gap:16px;}}

.sec-card{
  display:flex;
  flex-direction:column;
  gap:14px;
  background:var(--surface-1);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  transition:transform .16s ease-out,border-color .16s ease-out,box-shadow .16s ease-out;
}
.sec-card:hover{
  transform:translateY(-2px);
  border-color:var(--primary);
  box-shadow:var(--shadow-card),0 0 0 1px rgba(25,224,166,.35);
}
.card-icon{
  width:48px;height:48px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:14px;
  border:1px solid rgba(25,224,166,.4);
  background:rgba(25,224,166,.1);
  color:var(--primary);
}
.sec-card h3{
  font-size:20px;
  font-weight:600;
  line-height:1.5;
}
.sec-card p{
  font-size:15px;
  color:var(--text-2);
  line-height:1.8;
}
.sec-card .card-foot{margin-top:auto;padding-top:6px;}

/* 图文区块 */
.split{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;
  align-items:center;
}
@media (max-width:900px){.split{grid-template-columns:1fr;gap:28px;}}
.split-media{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-panel);
  overflow:hidden;
  background:var(--surface-1);
  aspect-ratio:16/10;
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-media .frame-tag{
  position:absolute;
  left:16px;bottom:16px;
  background:rgba(11,15,14,.82);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  padding:6px 14px;
  font-size:13px;
  color:var(--text-2);
}
.check-list{display:flex;flex-direction:column;gap:14px;margin-top:24px;}
.check-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:15px;
  color:var(--text-2);
  line-height:1.75;
}
.check-list .tick{
  flex:none;
  width:22px;height:22px;
  margin-top:3px;
  border-radius:7px;
  border:1px solid rgba(25,224,166,.5);
  background:rgba(25,224,166,.12);
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.check-list strong{color:var(--text);font-weight:600;}

/* 误区面板 */
.tip-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
@media (max-width:1024px){.tip-grid{grid-template-columns:1fr;}}
.tip-item{
  border:1px solid var(--line);
  border-left:3px solid var(--accent);
  border-radius:14px;
  background:var(--surface-1);
  padding:22px;
}
.tip-item h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.tip-item p{font-size:15px;color:var(--text-2);line-height:1.8;}

/* FAQ */
.faq-wrap{display:flex;flex-direction:column;gap:12px;max-width:940px;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface-1);
  overflow:hidden;
  transition:border-color .16s ease-out;
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item.is-open{border-color:var(--primary);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  text-align:left;
  padding:20px 22px;
  font-size:17px;
  font-weight:600;
  color:var(--text);
}
.faq-icon{
  flex:none;
  width:26px;height:26px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:8px;
  border:1px solid rgba(25,224,166,.5);
  color:var(--primary);
  font-size:16px;
  line-height:1;
  transition:transform .2s ease-out;
}
.faq-item.is-open .faq-icon{transform:rotate(180deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s ease-out;
}
.faq-item.is-open .faq-a{max-height:420px;}
.faq-a p{
  padding:0 22px 22px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}

/* CTA 带 */
.cta-band{
  position:relative;
  background:var(--surface-2);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:72px 0;
  overflow:hidden;
  text-align:center;
}
.cta-band .grid-texture{
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.55) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.55) 1px,transparent 1px);
  background-size:30px 30px;
  opacity:.05;
  pointer-events:none;
}
.cta-inner{position:relative;max-width:720px;margin:0 auto;}
.cta-inner h2{padding-left:0;text-align:center;}
.cta-inner h2::before{display:none;}
.cta-inner p{color:var(--text-2);font-size:16px;margin-bottom:26px;}
.cta-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;}
@media (max-width:640px){
  .cta-band{padding:56px 0;}
  .cta-actions .btn{width:100%;}
}

/* 页脚 */
.site-footer{
  background:var(--bg);
  border-top:1px solid var(--line);
  padding:64px 0 32px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid var(--line);
}
@media (max-width:900px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr;}}
.footer-brand-row{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.footer-title{
  font-size:14px;
  font-weight:600;
  color:var(--text);
  margin-bottom:14px;
  letter-spacing:.02em;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a,.footer-links span{
  font-size:14px;
  color:var(--text-2);
  transition:color .16s ease-out;
}
.footer-links a:hover{color:var(--primary);}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  padding-top:24px;
  font-size:13px;
  color:var(--text-3);
}

/* 浮动 CTA 与返回顶部 */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:75;
  display:flex;
  align-items:center;
  gap:10px;
  opacity:0;
  pointer-events:none;
  transform:translateY(12px);
  transition:opacity .22s ease-out,transform .22s ease-out,bottom .22s ease-out;
}
.float-cta.is-visible{opacity:1;pointer-events:auto;transform:translateY(0);}
.float-cta.is-visible.is-lifted{transform:translateY(-16px);}
.float-cta .hint{
  background:var(--surface-2);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-pill);
  padding:8px 14px;
  font-size:13px;
  color:var(--text-2);
  white-space:nowrap;
}
.to-top{
  position:fixed;
  right:24px;
  bottom:88px;
  z-index:74;
  width:44px;height:44px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  border:1px solid var(--line-strong);
  background:rgba(20,26,24,.9);
  color:var(--text-2);
  opacity:0;
  pointer-events:none;
  transform:translateY(12px);
  transition:opacity .22s ease-out,transform .22s ease-out,border-color .16s ease-out,color .16s ease-out;
}
.to-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0);}
.to-top:hover{border-color:var(--primary);color:var(--primary);}

@media (max-width:768px){
  .float-cta{
    left:0;right:0;bottom:0;
    flex-direction:row;
    justify-content:stretch;
    gap:10px;
    padding:12px 16px;
    background:rgba(11,15,14,.94);
    border-top:1px solid var(--line);
    transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0);}
  .float-cta.is-visible.is-lifted{transform:translateY(0);}
  .float-cta .hint{display:none;}
  .float-cta .btn{flex:1;}
  .to-top{display:none;}
  .site-footer{padding-bottom:96px;}
}

/* roulang page: category3 */
:root{
  --bg:#0B0F0E;
  --surface:#141A18;
  --surface-2:#1C2422;
  --line:#26302D;
  --line-2:#33403C;
  --primary:#19E0A6;
  --primary-d:#0FB183;
  --primary-l:#7BF3D2;
  --accent:#FF7A45;
  --text:#E6EDEA;
  --text-2:#9AA9A5;
  --text-3:#6C7A76;
  --ink:#07110D;
  --success:#34D399;
  --warn:#F5B942;
  --danger:#F2555A;
  --r-card:16px;
  --r-panel:20px;
  --r-input:12px;
  --r-badge:8px;
  --shadow:0 12px 32px rgba(0,0,0,.45);
  --container:1200px;
}
*,*::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:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",Inter,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
input,button{font-size:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
@media (min-width:1536px){.container{max-width:1280px;}}
.section{padding:104px 0;}
.section-tight{padding:72px 0;}
.muted{color:var(--text-2);}
.faint{color:var(--text-3);}
h1,h2,h3,h4{margin:0;color:var(--text);letter-spacing:-.01em;}
p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}
.lead{max-width:780px;color:var(--text-2);font-size:17px;line-height:1.85;}
.h2{font-size:clamp(24px,2.6vw,34px);line-height:1.35;font-weight:700;position:relative;padding-left:16px;}
.h2::before{content:"";position:absolute;left:0;top:.18em;width:4px;height:22px;border-radius:2px;background:var(--primary);}
.h3{font-size:20px;line-height:1.5;font-weight:600;}
.section-head{margin-bottom:40px;}
.section-head .h2{margin-bottom:14px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:999px;font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:all .16s ease-out;
  min-height:44px;white-space:nowrap;
}
.btn-primary{background:var(--primary);color:var(--ink);border-color:var(--primary);}
.btn-primary:hover{background:var(--primary-d);border-color:var(--primary-d);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-2);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-l);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{padding:9px 18px;font-size:14px;min-height:40px;}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--primary);
  font-size:14px;font-weight:600;transition:color .16s ease-out;
}
.btn-link svg{transition:transform .16s ease-out;}
.btn-link:hover{color:var(--primary-l);}
.btn-link:hover svg{transform:translateX(4px);}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-badge);font-size:12px;font-weight:500;
  border:1px solid rgba(25,224,166,.45);background:rgba(25,224,166,.1);color:var(--primary-l);
  line-height:1.7;
}
.badge-accent{border-color:rgba(255,122,69,.5);background:rgba(255,122,69,.12);color:#FFB08C;}
.tag-pill{
  display:inline-flex;align-items:center;
  padding:8px 16px;border-radius:999px;font-size:13px;font-weight:500;
  border:1px solid var(--line);background:var(--surface);color:var(--text-2);
  transition:all .16s ease-out;cursor:pointer;min-height:38px;
}
.tag-pill:hover{border-color:var(--primary);color:var(--primary-l);background:var(--surface-2);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  transition:background .24s ease-out,border-color .24s ease-out,backdrop-filter .24s ease-out;
  border-bottom:1px solid transparent;
}
.site-header.is-stuck{
  background:rgba(11,15,14,.9);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.nav-row{display:flex;align-items:center;gap:28px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-name{font-size:17px;font-weight:700;color:var(--text);letter-spacing:-.01em;}
.nav-links{display:flex;align-items:center;gap:18px;margin-left:8px;}
.nav-link{
  font-size:15px;font-weight:500;color:var(--text-2);
  padding:10px 2px;position:relative;transition:color .16s ease-out;
}
.nav-link:hover{color:var(--text);}
.nav-link.is-active{color:var(--primary);}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;border-radius:2px;background:var(--primary);
}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.search-box{
  display:flex;align-items:center;gap:8px;width:220px;height:40px;
  padding:0 14px;border-radius:var(--r-input);
  background:var(--surface);border:1px solid var(--line);color:var(--text-3);
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 2px rgba(25,224,166,.2);}
.search-box input{
  flex:1;min-width:0;background:transparent;border:0;outline:none;color:var(--text);font-size:14px;
}
.search-box input::placeholder{color:var(--text-3);}
.burger{
  display:none;align-items:center;justify-content:center;width:44px;height:44px;
  border-radius:12px;border:1px solid var(--line-2);background:var(--surface);color:var(--text);cursor:pointer;
  transition:border-color .16s ease-out;
}
.burger:hover{border-color:var(--primary);color:var(--primary-l);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);opacity:0;visibility:hidden;
  transition:opacity .24s ease-out,visibility .24s ease-out;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:320px;max-width:88vw;z-index:80;
  background:var(--surface);border-left:1px solid var(--line);
  padding:24px 22px;overflow-y:auto;
  transform:translateX(100%);transition:transform .28s ease-out;
  display:flex;flex-direction:column;gap:22px;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line-2);
  background:transparent;color:var(--text-2);cursor:pointer;
}
.drawer-close:hover{border-color:var(--primary);color:var(--primary-l);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{
  padding:12px 12px;border-radius:12px;font-size:15px;color:var(--text-2);
  transition:background .16s ease-out,color .16s ease-out;
}
.drawer-nav a:hover{background:var(--surface-2);color:var(--text);}
.drawer-nav a.is-active{color:var(--primary);background:rgba(25,224,166,.08);}
.drawer-actions{display:flex;flex-direction:column;gap:10px;margin-top:auto;}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-3);}
.crumb a{color:var(--text-2);transition:color .16s ease-out;}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:var(--line-2);}
.crumb .current{color:var(--text);}

/* ---------- 分类页头 ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(11,15,14,.82),rgba(11,15,14,.96)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(230,237,234,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(230,237,234,.06) 1px,transparent 1px);
  background-size:56px 56px;opacity:.7;
}
.cat-hero > .container{position:relative;z-index:2;padding-top:28px;padding-bottom:56px;}
.cat-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:32px;align-items:end;margin-top:32px;}
.cat-hero h1{font-size:clamp(30px,4.4vw,52px);line-height:1.22;font-weight:800;max-width:900px;}
.cat-hero .lead{margin-top:18px;}
.cat-hero .kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--primary);font-weight:600;
  letter-spacing:.06em;
}
.dot-live{width:8px;height:8px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 4px rgba(25,224,166,.16);}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.hero-side{display:flex;flex-direction:column;gap:12px;align-items:flex-end;}

/* ---------- 搜索 + 标签 ---------- */
.search-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-panel);
  padding:24px;box-shadow:var(--shadow);
}
.search-panel .row{display:flex;gap:12px;flex-wrap:wrap;}
.search-input{
  display:flex;align-items:center;gap:10px;flex:1;min-width:240px;
  height:48px;padding:0 16px;border-radius:var(--r-input);
  background:var(--bg);border:1px solid var(--line);color:var(--text-3);
  transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.search-input:focus-within{border-color:var(--primary);box-shadow:0 0 0 2px rgba(25,224,166,.18);}
.search-input input{flex:1;min-width:0;background:transparent;border:0;outline:none;color:var(--text);font-size:15px;}
.search-input input::placeholder{color:var(--text-3);}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}

/* ---------- 数据条 ---------- */
.metric-row{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;background:var(--line);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
}
.metric{background:var(--surface);padding:24px;display:flex;flex-direction:column;gap:6px;}
.metric b{font-size:clamp(28px,3vw,40px);font-weight:800;font-variant-numeric:tabular-nums;color:var(--text);line-height:1.1;}
.metric span{font-size:13px;color:var(--text-2);}

/* ---------- FAQ 手风琴 ---------- */
.faq-layout{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;align-items:start;}
.faq-col{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .16s ease-out,box-shadow .16s ease-out,transform .16s ease-out;
}
.faq-item:hover{border-color:var(--line-2);}
.faq-item.is-open{border-color:var(--primary);box-shadow:0 0 0 1px rgba(25,224,166,.28),var(--shadow);}
.faq-q{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:20px 22px;background:transparent;border:0;cursor:pointer;text-align:left;
  color:var(--text);font-size:17px;font-weight:600;line-height:1.6;
}
.faq-q:hover{color:var(--primary-l);}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:999px;border:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:16px;line-height:1;
  transition:transform .2s ease-out,border-color .2s ease-out,background .2s ease-out;
}
.faq-item.is-open .faq-icon{background:rgba(25,224,166,.12);border-color:var(--primary);transform:rotate(180deg);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .28s ease-out;
}
.faq-a-inner{padding:0 22px 22px;color:var(--text-2);font-size:15px;line-height:1.85;}
.faq-a-inner ul{margin:12px 0 0;padding-left:0;list-style:none;}
.faq-a-inner li{position:relative;padding-left:18px;margin-bottom:8px;}
.faq-a-inner li::before{
  content:"";position:absolute;left:0;top:.68em;width:6px;height:6px;border-radius:2px;background:var(--primary);
}

/* ---------- 图文区块 ---------- */
.split{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:48px;align-items:center;}
.figure-frame{
  border:1px solid var(--line);border-radius:var(--r-panel);overflow:hidden;background:var(--surface);
  box-shadow:var(--shadow);
}
.figure-frame img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.check-list{list-style:none;margin:22px 0 0;padding:0;display:flex;flex-direction:column;gap:14px;}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-2);line-height:1.8;}
.check-list .mk{
  flex:0 0 auto;width:22px;height:22px;border-radius:6px;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(25,224,166,.5);background:rgba(25,224,166,.1);color:var(--primary);margin-top:4px;
}

/* ---------- 卡片 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform .16s ease-out,border-color .16s ease-out,box-shadow .16s ease-out;
}
.card:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:0 0 0 1px rgba(25,224,166,.35),var(--shadow);}
.card-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .16s ease-out;}
.card:hover .card-cover img{transform:scale(1.03);}
.card-cover .badge{position:absolute;left:12px;top:12px;backdrop-filter:blur(4px);}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:17px;font-weight:600;line-height:1.55;}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3);}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--surface-2);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:88px 0;text-align:center;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(230,237,234,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(230,237,234,.05) 1px,transparent 1px);
  background-size:48px 48px;
}
.cta-band > .container{position:relative;z-index:2;}
.cta-band h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.35;}
.cta-band p{max-width:720px;margin:16px auto 0;color:var(--text-2);}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:30px;}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg);padding:72px 0 32px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:40px;}
.footer-brand-row{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-title{font-size:14px;font-weight:700;color:var(--text);margin-bottom:16px;letter-spacing:.02em;}
.footer-links{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--text-2);transition:color .16s ease-out;}
.footer-links a:hover{color:var(--primary);}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ---------- 浮动 CTA / 返回顶部 ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:55;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;border-radius:999px;background:var(--primary);color:var(--ink);
  font-size:15px;font-weight:700;box-shadow:var(--shadow);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .24s ease-out;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--primary-d);}
.float-cta .hint{display:none;font-weight:500;font-size:13px;}
.float-cta:hover .hint{display:inline;}
.float-cta.is-lift{transform:translateY(-16px);}
.back-top{
  position:fixed;right:24px;bottom:88px;z-index:54;
  width:46px;height:46px;border-radius:999px;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line-2);color:var(--text-2);
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(12px);
  transition:all .24s ease-out;
}
.back-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{border-color:var(--primary);color:var(--primary-l);}
.mobile-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:56;
  display:none;gap:10px;padding:12px 16px;
  background:rgba(11,15,14,.94);border-top:1px solid var(--line);
  backdrop-filter:blur(6px);
}
.mobile-cta .btn{flex:1;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr;}
  .footer-grid > div:last-child{grid-column:1 / -1;}
}
@media (max-width:1024px){
  .container{padding:0 24px;}
  .nav-links{display:none;}
  .burger{display:inline-flex;}
  .search-box{display:none;}
  .nav-cta-desktop{display:none;}
  .section{padding:80px 0;}
  .cat-hero-grid{grid-template-columns:1fr;align-items:start;}
  .hero-side{align-items:flex-start;}
  .faq-layout{grid-template-columns:1fr;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .split{grid-template-columns:1fr;gap:32px;}
  .metric-row{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:768px){
  .nav-row{height:64px;gap:16px;}
  .brand-name{font-size:15px;}
  .float-cta,.back-top{display:none;}
  .mobile-cta.is-visible{display:flex;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-band{padding:64px 0;}
  .section{padding:64px 0;}
  .section-tight{padding:52px 0;}
}
@media (max-width:520px){
  .container{padding:0 20px;}
  .card-grid{grid-template-columns:1fr;}
  .metric-row{grid-template-columns:1fr;}
  .btn{width:100%;}
  .hero-actions .btn{width:auto;}
  .mobile-cta .btn{width:auto;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category4 */
:root{
  --bg:#0B0F0E;
  --surface-1:#141A18;
  --surface-2:#1C2422;
  --line:#26302D;
  --line-strong:#33403C;
  --primary:#19E0A6;
  --primary-dark:#0FB183;
  --primary-light:#7BF3D2;
  --accent:#FF7A45;
  --text:#E6EDEA;
  --text-2:#9AA9A5;
  --text-3:#6C7A76;
  --ok:#34D399;
  --warn:#F5B942;
  --danger:#F2555A;
  --radius-card:16px;
  --radius-panel:20px;
  --radius-input:12px;
  --radius-badge:8px;
  --shadow-card:0 12px 32px rgba(0,0,0,.45);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Inter",Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .16s ease-out,border-color .16s ease-out;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p,figure,dl,dd{margin:0;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px;}
.muted{color:var(--text-2);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .22s ease-out,border-color .22s ease-out,backdrop-filter .22s ease-out;
}
.site-header.is-scrolled{
  background:rgba(11,15,14,.9);
  border-bottom-color:var(--line);
  backdrop-filter:blur(6px);
}
.nav-row{display:flex;align-items:center;height:72px;gap:16px;}
.brand{display:inline-flex;align-items:center;gap:10px;min-height:44px;}
.brand-name{font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap;}
.brand:hover .brand-name{color:var(--primary-light);}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:26px;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:8px 2px;font-size:15px;color:var(--text-2);
}
.nav-link:hover{color:var(--text);}
.nav-link.is-active{color:var(--primary);}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--primary);border-radius:2px;
}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px;}
.search-box{
  display:inline-flex;align-items:center;gap:8px;
  width:220px;height:40px;padding:0 14px;
  background:var(--surface-1);border:1px solid var(--line);border-radius:var(--radius-input);
  color:var(--text-3);transition:border-color .16s ease-out,box-shadow .16s ease-out;
}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 2px rgba(25,224,166,.18);}
.search-box input{
  flex:1;min-width:0;background:transparent;border:0;outline:none;color:var(--text);font-size:14px;
}
.search-box input::placeholder{color:var(--text-3);}
.burger{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line-strong);color:var(--text);
}
.burger:hover{border-color:var(--primary);color:var(--primary);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;min-height:44px;
  font-size:15px;font-weight:600;border-radius:999px;
  border:1px solid transparent;cursor:pointer;
  transition:background .16s ease-out,color .16s ease-out,border-color .16s ease-out,transform .16s ease-out;
}
.btn-primary{background:var(--primary);color:#07110D;}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border-color:var(--line-strong);color:var(--text);}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary-light);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{padding:9px 18px;min-height:38px;font-size:14px;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:600;}
.link-arrow span{transition:transform .16s ease-out;}
.link-arrow:hover{color:var(--primary-light);}
.link-arrow:hover span{transform:translateX(4px);}

/* ---------- 标签 / 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--radius-badge);
  font-size:12px;font-weight:500;line-height:1.6;
  color:var(--primary-light);
  background:rgba(25,224,166,.1);
  border:1px solid rgba(25,224,166,.45);
}
.badge-accent{color:#FFD9C8;background:rgba(255,122,69,.12);border-color:rgba(255,122,69,.5);}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--primary);margin-bottom:14px;
}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;
  padding:34px 0 64px;
  border-bottom:1px solid var(--line);
  background-color:#0C1211;
  background-image:
    linear-gradient(rgba(11,15,14,.9),rgba(11,15,14,.97)),
    url('/assets/images/backpic/back-2.png');
  background-size:cover,cover;
  background-position:center,center;
  overflow:hidden;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);flex-wrap:wrap;}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .current{color:var(--text);}
.page-head-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;margin-top:28px;}
.page-h1{
  font-size:clamp(30px,4.4vw,48px);
  line-height:1.22;
  font-weight:800;
  letter-spacing:-.01em;
  max-width:16em;
}
.page-lead{margin-top:18px;max-width:780px;font-size:17px;color:var(--text-2);}
.page-head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.page-head-figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--radius-panel);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.stat-strip{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin-top:44px;border-top:1px solid var(--line);
}
.stat{padding:20px 18px;border-right:1px solid var(--line);}
.stat:last-child{border-right:0;}
.stat-num{
  font-size:clamp(24px,2.4vw,32px);font-weight:700;color:var(--primary);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.stat-label{font-size:13px;color:var(--text-2);margin-top:4px;}

/* ---------- 板块 ---------- */
.section{padding:92px 0;}
.section-alt{
  background-color:#0F1513;
  background-image:
    repeating-linear-gradient(0deg,rgba(255,255,255,.035) 0 1px,transparent 1px 34px),
    repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 1px,transparent 1px 34px);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{margin-bottom:36px;max-width:820px;}
.section-h2{
  position:relative;
  padding-left:16px;
  font-size:clamp(24px,2.6vw,34px);
  font-weight:700;line-height:1.35;
}
.section-h2::before{
  content:"";position:absolute;left:0;top:.3em;
  width:4px;height:22px;border-radius:2px;background:var(--primary);
}
.section-sub{margin-top:14px;font-size:16px;color:var(--text-2);max-width:780px;}

/* ---------- 对照表 ---------- */
.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--radius-panel);
  background:var(--surface-1);
  overflow-x:auto;
  box-shadow:var(--shadow-card);
}
.entry-table{width:100%;min-width:860px;border-collapse:separate;border-spacing:0;font-size:15px;line-height:1.7;}
.entry-table thead th{
  background:var(--surface-2);
  color:var(--text-2);
  font-weight:600;text-align:left;
  padding:14px 18px;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.entry-table tbody td{
  padding:18px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
  color:var(--text-2);
}
.entry-table tbody tr:last-child td{border-bottom:0;}
.entry-table tbody tr:nth-child(even){background:rgba(255,255,255,.03);}
.entry-table tbody tr:hover{background:rgba(25,224,166,.05);}
.entry-table td:first-child{color:var(--text);font-weight:600;white-space:nowrap;}
.entry-table td:first-child .cell-ico{display:block;margin-bottom:6px;color:var(--primary);}

.device-cards{display:none;gap:16px;}
.device-card{
  background:var(--surface-1);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:20px;
  box-shadow:var(--shadow-card);
}
.kv-row{display:grid;grid-template-columns:80px 1fr;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line);}
.kv-row:last-child{border-bottom:0;padding-bottom:0;}
.kv-row dt{font-size:13px;color:var(--text-3);}
.kv-row dd{font-size:15px;color:var(--text);line-height:1.7;word-break:break-word;}

/* ---------- 图文分栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.split-figure img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--radius-panel);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.split-body h2{margin-bottom:18px;}
.split-body p{color:var(--text-2);max-width:780px;}
.check-list{margin-top:18px;}
.check-list li{position:relative;padding-left:20px;margin-top:10px;font-size:15.5px;color:var(--text-2);}
.check-list li::before{
  content:"";position:absolute;left:0;top:.66em;width:7px;height:7px;
  border-radius:2px;background:var(--primary);
}

/* ---------- 步骤列表 ---------- */
.step-list{display:grid;gap:22px;max-width:820px;}
.step-list li{display:grid;grid-template-columns:44px 1fr;gap:18px;align-items:start;}
.step-num{
  width:44px;height:44px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(25,224,166,.12);
  border:1px solid rgba(25,224,166,.45);
  color:var(--primary);font-weight:700;font-size:16px;
  font-variant-numeric:tabular-nums;
}
.step-list h3{font-size:19px;font-weight:600;line-height:1.5;}
.step-list p{margin-top:6px;font-size:15.5px;color:var(--text-2);max-width:780px;}

/* ---------- 差异说明 ---------- */
.note-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:22px;}
.note-card{
  background:var(--surface-1);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:22px;
  transition:transform .16s ease-out,border-color .16s ease-out,box-shadow .16s ease-out;
}
.note-card:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:0 0 0 1px rgba(25,224,166,.35),var(--shadow-card);}
.note-card h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.note-card p{font-size:15px;color:var(--text-2);}
.quote{
  border-left:3px solid var(--primary);
  background:var(--surface-1);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  padding:20px 22px;
  font-size:15.5px;color:var(--text-2);
  max-width:780px;
}

/* ---------- 相关入口链接列表 ---------- */
.entry-links{display:grid;gap:14px;}
.entry-link{
  display:grid;grid-template-columns:44px 1fr auto;gap:16px;align-items:center;
  padding:18px 20px;
  background:var(--surface-1);border:1px solid var(--line);
  border-radius:var(--radius-card);
  transition:transform .16s ease-out,border-color .16s ease-out,box-shadow .16s ease-out;
}
.entry-link:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:0 0 0 1px rgba(25,224,166,.35),var(--shadow-card);}
.entry-link .ico{
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(25,224,166,.1);border:1px solid rgba(25,224,166,.4);color:var(--primary);
}
.entry-link h3{font-size:17px;font-weight:600;}
.entry-link p{font-size:14px;color:var(--text-2);margin-top:4px;}
.entry-link .go{color:var(--primary);font-size:14px;font-weight:600;white-space:nowrap;}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;}
.faq-item{
  background:var(--surface-1);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;
  transition:border-color .16s ease-out;
}
.faq-item + .faq-item{margin-top:12px;}
.faq-item.open{border-color:var(--line-strong);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;text-align:left;
  font-size:17px;font-weight:600;color:var(--text);line-height:1.6;
  min-height:56px;
}
.faq-q:hover{color:var(--primary-light);}
.faq-icon{color:var(--primary);font-size:20px;line-height:1;flex:none;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease-out;}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:780px;}
.faq-item.open .faq-a{max-height:460px;}

/* ---------- CTA 通栏 ---------- */
.cta-band{
  padding:80px 0;
  border-top:1px solid var(--line);
  background-color:#1C2422;
  background-image:
    repeating-linear-gradient(0deg,rgba(255,255,255,.05) 0 1px,transparent 1px 34px),
    repeating-linear-gradient(90deg,rgba(255,255,255,.05) 0 1px,transparent 1px 34px),
    linear-gradient(rgba(28,36,34,.94),rgba(28,36,34,.94));
}
.cta-inner{text-align:center;max-width:820px;margin:0 auto;}
.cta-inner h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.4;}
.cta-inner p{margin-top:14px;font-size:16px;color:var(--text-2);}
.cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin-top:28px;}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg);padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:36px;}
.footer-brand-row{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-title{font-size:14px;font-weight:600;color:var(--text);margin-bottom:14px;letter-spacing:.02em;}
.footer-links li{margin-bottom:10px;}
.footer-links a,.footer-links span{font-size:14px;color:var(--text-2);}
.footer-links a:hover{color:var(--primary);}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- 浮动 CTA / 返回顶部 ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:60;
  display:flex;align-items:center;gap:10px;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s ease-out,transform .24s ease-out,visibility .24s ease-out,bottom .24s ease-out;
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta.avoid{bottom:40px;}
.btn-float{box-shadow:0 12px 32px rgba(0,0,0,.45);}
.float-tip{
  position:absolute;right:0;bottom:calc(100% + 8px);
  white-space:nowrap;font-size:13px;color:var(--text-2);
  background:var(--surface-1);border:1px solid var(--line);
  border-radius:999px;padding:6px 14px;
  opacity:0;transition:opacity .18s ease-out;pointer-events:none;
}
.float-cta:hover .float-tip{opacity:1;}
.float-cta .cta-mobile-ghost{display:none;}
.to-top{
  position:fixed;right:28px;bottom:88px;z-index:59;
  width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--surface-1);border:1px solid var(--line-strong);color:var(--text-2);
  opacity:0;visibility:hidden;transition:opacity .24s ease-out,visibility .24s ease-out,border-color .16s ease-out,color .16s ease-out;
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{border-color:var(--primary);color:var(--primary);}

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:80;
  width:min(88vw,360px);
  background:var(--surface-1);
  border-left:1px solid var(--line);
  padding:22px;
  transform:translateX(102%);
  transition:transform .26s ease-out;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;color:var(--text-2);
}
.drawer-close:hover{border-color:var(--primary);color:var(--primary);}
.drawer-links a{display:block;padding:14px 2px;font-size:16px;color:var(--text-2);border-bottom:1px solid var(--line);}
.drawer-links a:hover,.drawer-links a.is-active{color:var(--primary);}
.drawer-actions{display:grid;gap:12px;margin-top:22px;}
.drawer-mask{
  position:fixed;inset:0;z-index:70;background:rgba(0,0,0,.6);
  opacity:0;visibility:hidden;transition:opacity .26s ease-out,visibility .26s ease-out;
}
.drawer-mask.open{opacity:1;visibility:visible;}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .container{padding:0 24px;}
  .nav-links{display:none;}
  .search-box{display:none;}
  .nav-cta-desktop{display:none;}
  .burger{display:inline-flex;}
  .page-head-grid{grid-template-columns:1fr;gap:28px;}
  .split{grid-template-columns:1fr;gap:28px;}
  .note-grid{grid-template-columns:1fr;}
  .section{padding:72px 0;}
}
@media (max-width:767px){
  .container{padding:0 20px;}
  .page-head{padding:24px 0 48px;}
  .page-h1{font-size:clamp(26px,7vw,34px);}
  .page-lead{font-size:16px;}
  .stat-strip{grid-template-columns:1fr 1fr;}
  .stat{border-bottom:1px solid var(--line);}
  .stat:nth-child(2n){border-right:0;}
  .stat:nth-last-child(-n+2){border-bottom:0;}
  .section{padding:56px 0;}
  .table-wrap{display:none;}
  .device-cards{display:grid;}
  .entry-link{grid-template-columns:40px 1fr;gap:14px;}
  .entry-link .go{grid-column:2;font-size:13px;}
  .faq-a-inner{padding:0 18px 18px;}
  .cta-band{padding:60px 0;}
  .cta-actions{flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
  .float-cta{
    left:0;right:0;bottom:0;
    padding:12px 16px;
    background:rgba(11,15,14,.94);
    border-top:1px solid var(--line);
    backdrop-filter:blur(6px);
    gap:10px;
  }
  .float-cta.avoid{bottom:0;}
  .float-cta .btn{flex:1;}
  .float-cta .cta-mobile-ghost{display:inline-flex;}
  .float-tip{display:none;}
  .to-top{right:16px;bottom:88px;}
}
@media (max-width:519px){
  .brand-name{font-size:15px;}
  .btn{padding:12px 18px;font-size:14.5px;}
  .stat-num{font-size:24px;}
}