/* roulang page: index */
:root{
  --bg-base:#061017;
  --bg-deep:#030A0F;
  --surface:#0B1B26;
  --surface-2:#102A38;
  --glass:rgba(18,42,56,.55);
  --glass-border:rgba(120,224,235,.14);
  --accent:#2FE3C4;
  --accent-ink:#04151A;
  --accent-2:#FFB454;
  --text-1:#E8F3F7;
  --text-2:#9DB4C0;
  --text-3:#6B8391;
  --line:rgba(255,255,255,.08);
  --radius-card:18px;
  --radius-img:14px;
  --radius-btn:12px;
  --shadow-card:0 18px 48px -24px rgba(0,0,0,.75);
  --shadow-float:0 30px 80px -30px rgba(0,0,0,.85);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:'HarmonyOS Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:ui-monospace,'SFMono-Regular',Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,li,figure,blockquote{margin:0;padding:0;}
ul,ol{list-style:none;}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease);}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:0;}
::selection{background:rgba(47,227,196,.28);color:#fff;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
@media(min-width:1024px){.container{padding:0 32px;}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .24s var(--ease),backdrop-filter .24s var(--ease),border-color .24s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,16,23,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px;}
@media(min-width:1024px){.nav-wrap{height:72px;gap:28px;}}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--accent),#1B9C8B);
  color:var(--accent-ink);font-family:var(--font-mono);font-weight:700;font-size:18px;
  box-shadow:0 0 0 1px rgba(47,227,196,.35),0 10px 26px -14px rgba(47,227,196,.9);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em;}
.brand-text small{font-size:11px;color:var(--text-3);letter-spacing:.08em;}
.nav-main{display:none;}
@media(min-width:1024px){
  .nav-main{display:flex;align-items:center;gap:28px;}
}
.nav-link{
  position:relative;font-size:15px;color:var(--text-2);padding:6px 0;
  display:inline-flex;align-items:center;gap:6px;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--text-1);}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--accent);}
.nav-more{position:relative;}
.nav-more-btn{background:none;border:0;cursor:pointer;}
.nav-more-btn .caret{width:8px;height:8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .22s var(--ease);}
.nav-more:hover .caret,.nav-more:focus-within .caret{transform:rotate(225deg) translateY(-2px);}
.mega{
  position:absolute;top:calc(100% + 18px);right:0;width:760px;
  background:var(--glass);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  border:1px solid var(--glass-border);border-radius:18px;
  box-shadow:var(--shadow-float);
  padding:24px;opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .16s var(--ease),transform .16s var(--ease),visibility .16s;
  display:grid;grid-template-columns:1.15fr .85fr;gap:24px;
}
.mega::before{
  content:"";position:absolute;left:24px;right:24px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
}
.nav-more:hover .mega,.nav-more:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega-title{font-size:12px;letter-spacing:.14em;color:var(--text-3);margin-bottom:14px;font-family:var(--font-mono);}
.mega-list li a{
  display:flex;align-items:baseline;gap:12px;padding:9px 10px;border-radius:10px;
  color:var(--text-2);font-size:14px;
}
.mega-list li a:hover{background:rgba(47,227,196,.08);color:var(--text-1);}
.mega-list .mono{font-family:var(--font-mono);font-size:12px;color:var(--accent);opacity:.75;font-variant-numeric:tabular-nums;}
.mega-list .hint{color:var(--text-3);font-size:12px;}
.mega-news li{padding:9px 0;border-bottom:1px solid var(--line);}
.mega-news li:last-child{border-bottom:0;}
.mega-news a{font-size:14px;color:var(--text-2);display:block;}
.mega-news a:hover{color:var(--accent);}
.mega-news time{font-size:12px;color:var(--accent-2);font-family:var(--font-mono);}
.mega-card{
  margin-top:14px;display:flex;gap:12px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px;
}
.mega-card img{width:62px;height:44px;object-fit:cover;border-radius:10px;background:var(--surface-2);}
.mega-card p{font-size:12px;color:var(--text-3);line-height:1.6;}
.mega-card .mini-btn{
  display:inline-block;margin-top:6px;font-size:12px;color:var(--accent);
  border-bottom:1px solid rgba(47,227,196,.5);padding-bottom:1px;
}
.burger{
  display:flex;align-items:center;justify-content:center;flex-direction:column;gap:5px;
  width:40px;height:40px;border-radius:10px;border:1px solid var(--glass-border);
  background:rgba(16,42,56,.5);
}
@media(min-width:1024px){.burger{display:none;}}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-1);transition:transform .22s var(--ease),opacity .22s var(--ease);}

/* 移动抽屉 */
.nav-toggle{position:absolute;opacity:0;pointer-events:none;}
.drawer{
  position:fixed;inset:0;z-index:120;
  background:rgba(3,10,15,.97);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  padding:24px 20px 40px;
  display:flex;flex-direction:column;gap:8px;
  transform:translateX(100%);opacity:0;visibility:hidden;
  transition:transform .26s var(--ease),opacity .26s var(--ease),visibility .26s;
  overflow-y:auto;
}
.nav-toggle:checked ~ .drawer{transform:translateX(0);opacity:1;visibility:visible;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-close{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--glass-border);
  display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--text-2);
}
.drawer-link{
  display:block;font-size:20px;font-weight:600;padding:14px 4px;
  border-bottom:1px solid var(--line);color:var(--text-1);
}
.drawer-link:hover{color:var(--accent);}
.drawer-link.is-active{color:var(--accent);}
.drawer details{border-bottom:1px solid var(--line);}
.drawer summary{
  list-style:none;cursor:pointer;font-size:20px;font-weight:600;padding:14px 4px;
  display:flex;align-items:center;justify-content:space-between;
}
.drawer summary::-webkit-details-marker{display:none;}
.drawer summary::after{content:"+";color:var(--accent);font-size:22px;font-weight:400;}
.drawer details[open] summary::after{content:"–";}
.drawer .sub a{display:block;padding:10px 4px 10px 16px;font-size:16px;color:var(--text-2);}
.drawer .sub a:hover{color:var(--accent);}
.drawer-cta{margin-top:26px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--radius-btn);font-weight:600;font-size:15px;
  border:1px solid transparent;transition:all .22s var(--ease);
}
.btn-primary{background:var(--accent);color:var(--accent-ink);}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 14px 40px -10px rgba(47,227,196,.6);}
.btn-primary:active{box-shadow:0 0 0 rgba(0,0,0,0);}
.btn-ghost{background:transparent;border-color:var(--glass-border);color:var(--text-1);}
.btn-ghost:hover{border-color:var(--accent);background:rgba(47,227,196,.08);}
.btn-text{
  color:var(--accent);font-weight:600;padding:4px 0;
  border-bottom:2px solid rgba(47,227,196,.35);border-radius:0;
}
.btn-text:hover{border-bottom-color:var(--accent);}
.icon-btn{
  width:40px;height:40px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--glass);border:1px solid var(--glass-border);color:var(--text-2);
  transition:all .22s var(--ease);
}
.icon-btn:hover{color:var(--accent);border-color:var(--accent);background:rgba(47,227,196,.08);}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  margin-top:-60px;padding:112px 0 64px;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
@media(min-width:1024px){.hero{margin-top:-72px;padding:150px 0 96px;}}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(3,10,15,.78) 0%,rgba(6,16,23,.86) 55%,var(--bg-base) 100%);
}
.hero::after{
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:linear-gradient(rgba(120,224,235,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,224,235,.06) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 30% 30%,#000 0%,transparent 72%);
  mask-image:radial-gradient(circle at 30% 30%,#000 0%,transparent 72%);
}
.hero .container{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center;}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.08fr .92fr;gap:56px;}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-family:var(--font-mono);letter-spacing:.1em;
  color:var(--accent);border:1px solid var(--glass-border);border-radius:999px;
  padding:6px 14px;background:rgba(16,42,56,.5);margin-bottom:22px;
}
.pulse-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 0 rgba(47,227,196,.7);animation:pulse 2.2s infinite;}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(47,227,196,.7);}
  70%{box-shadow:0 0 0 12px rgba(47,227,196,0);}
  100%{box-shadow:0 0 0 0 rgba(47,227,196,0);}
}
.hero h1{
  font-size:32px;font-weight:700;line-height:1.15;letter-spacing:.01em;
  margin-bottom:18px;
}
@media(min-width:768px){.hero h1{font-size:42px;}}
@media(min-width:1024px){.hero h1{font-size:54px;}}
.hero-sub{font-size:16px;color:var(--text-2);max-width:640px;margin-bottom:26px;line-height:1.9;}
@media(min-width:768px){.hero-sub{font-size:17px;}}
.capsule-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;}
.capsule{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;border-radius:999px;font-size:14px;
  border:1px solid var(--line);background:rgba(11,27,38,.7);color:var(--text-2);
}
.capsule:hover{border-color:var(--accent);color:var(--accent);background:rgba(47,227,196,.08);}
.capsule .mono{font-family:var(--font-mono);font-size:11px;opacity:.7;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
.hero-visual{position:relative;}
.hero-visual .frame{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--glass-border);box-shadow:var(--shadow-float);
  background:var(--surface-2);
}
.hero-visual .frame img{width:100%;height:280px;object-fit:cover;}
@media(min-width:768px){.hero-visual .frame img{height:360px;}}
.hero-visual .badge-float{
  position:absolute;left:-10px;bottom:24px;
  background:var(--glass);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid var(--glass-border);border-radius:14px;padding:14px 18px;
  box-shadow:var(--shadow-card);
}
.hero-visual .badge-float strong{display:block;font-family:var(--font-mono);font-size:22px;color:var(--accent);font-variant-numeric:tabular-nums;}
.hero-visual .badge-float span{font-size:12px;color:var(--text-2);}

/* ---------- 状态条 / 数据 ---------- */
.strip{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--bg-deep);
  padding:28px 0;
}
.strip-row{display:flex;flex-wrap:wrap;gap:14px 32px;align-items:center;justify-content:space-between;}
.status-live{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-2);}
.status-live .pulse-dot{background:var(--accent-2);}
.stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 32px;}
@media(min-width:768px){.stat-grid{grid-template-columns:repeat(4,minmax(0,1fr));}}
.stat-item strong{
  display:block;font-family:var(--font-mono);font-size:24px;color:var(--text-1);
  font-variant-numeric:tabular-nums;letter-spacing:.01em;
}
.stat-item span{font-size:13px;color:var(--text-3);}

/* ---------- 通用板块 ---------- */
.section{padding:56px 0;}
@media(min-width:1024px){.section{padding:96px 0;}}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px;}
.section-head h2{font-size:24px;font-weight:650;line-height:1.3;letter-spacing:.01em;}
@media(min-width:1024px){.section-head h2{font-size:32px;}}
.section-head .desc{font-size:14px;color:var(--text-3);margin-top:8px;max-width:720px;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 合集目录 ---------- */
.toc-list{border-top:1px solid var(--line);}
.toc-row{
  display:flex;align-items:center;gap:18px;
  min-height:72px;padding:14px 16px;border-bottom:1px solid var(--line);
  border-radius:12px;transition:background-color .22s var(--ease),transform .22s var(--ease);
}
.toc-row:hover{background:rgba(18,42,56,.6);transform:translateX(4px);}
.toc-num{
  font-family:var(--font-mono);font-size:28px;line-height:1;flex-shrink:0;width:56px;
  color:transparent;-webkit-text-stroke:1px rgba(47,227,196,.45);
  font-variant-numeric:tabular-nums;transition:color .22s var(--ease);
}
.toc-row:hover .toc-num{color:var(--accent);-webkit-text-stroke:1px transparent;}
.toc-body{flex:1;min-width:0;}
.toc-body h3{font-size:18px;font-weight:600;color:var(--text-1);}
@media(min-width:1024px){.toc-body h3{font-size:20px;}}
.toc-body p{font-size:13px;color:var(--text-3);margin-top:2px;}
.toc-arrow{color:var(--text-3);font-size:18px;flex-shrink:0;transition:color .22s var(--ease),transform .22s var(--ease);}
.toc-row:hover .toc-arrow{color:var(--accent);transform:translateX(4px);}

/* ---------- 卡片通用 ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;position:relative;
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.18),transparent);
}
.card:hover{transform:translateY(-2px);border-color:rgba(47,227,196,.45);}
.card-cover{position:relative;overflow:hidden;background:var(--surface-2);aspect-ratio:16/10;}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease);}
.card:hover .card-cover img{transform:scale(1.04);}
.badge{
  display:inline-flex;align-items:center;font-size:12px;padding:3px 10px;border-radius:999px;
  border:1px solid rgba(255,180,84,.45);color:var(--accent-2);background:rgba(255,180,84,.08);
  font-family:var(--font-mono);letter-spacing:.02em;
}
.badge-cover{position:absolute;left:12px;top:12px;background:rgba(3,10,15,.78);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);}
.card-body{padding:18px;}
.card-body h3{font-size:18px;font-weight:600;line-height:1.45;margin-bottom:8px;color:var(--text-1);}
@media(min-width:1024px){.card-body h3{font-size:20px;}}
.card:hover .card-body h3{color:var(--accent);}
.card-body .excerpt{
  font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  display:flex;align-items:center;gap:8px;margin-top:14px;
  font-size:13px;color:var(--text-3);font-family:var(--font-mono);
}
.card-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--text-3);}
.card-meta .go{margin-left:auto;color:var(--accent);}

/* ---------- 精选条目 8/4 ---------- */
.feature-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media(min-width:1024px){.feature-grid{grid-template-columns:2fr 1fr;align-items:stretch;}}
.feature-side{display:grid;grid-template-columns:1fr;gap:24px;}
.feature-lead{display:grid;grid-template-columns:1fr;height:100%;}
@media(min-width:640px){.feature-lead{grid-template-columns:45% 55%;}}
.feature-lead .card-cover{aspect-ratio:auto;height:220px;}
@media(min-width:640px){.feature-lead .card-cover{height:100%;min-height:300px;}}
.feature-lead .card-body{display:flex;flex-direction:column;justify-content:center;padding:26px;}
.feature-lead .card-body h3{font-size:22px;}
@media(min-width:1024px){.feature-lead .card-body h3{font-size:26px;}}
.feature-side .card-cover{aspect-ratio:16/10;}

/* ---------- 最新信息 ---------- */
.news-wrap{display:grid;grid-template-columns:1fr;gap:24px;}
@media(min-width:1024px){.news-wrap{grid-template-columns:1fr 1fr;gap:32px;}}
.news-lead .card-cover{aspect-ratio:16/10;}
.news-lead .card-body h3{font-size:22px;}
.news-list{border-top:1px solid var(--line);}
.news-item{
  display:block;padding:18px 16px;border-bottom:1px solid var(--line);border-radius:12px;
  transition:background-color .22s var(--ease);
}
.news-item:hover{background:var(--surface-2);}
.news-item .row-top{display:flex;align-items:center;gap:10px;margin-bottom:8px;}
.news-item h3{font-size:16px;font-weight:600;line-height:1.5;color:var(--text-1);}
.news-item:hover h3{color:var(--accent);}
.news-item p{
  font-size:13px;color:var(--text-3);margin-top:6px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.news-item time{font-size:12px;color:var(--accent-2);font-family:var(--font-mono);margin-left:auto;}
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;
  border:1px dashed var(--line);border-radius:var(--radius-card);background:rgba(11,27,38,.5);
  text-align:center;padding:24px;
}
.empty-state p{font-size:15px;color:var(--text-2);}

/* ---------- 横向滑轨 ---------- */
.rail-wrap{position:relative;}
.rail-mask{position:absolute;right:0;top:0;bottom:0;width:90px;pointer-events:none;background:linear-gradient(90deg,transparent,var(--bg-base));z-index:2;}
.rail{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:10px;scrollbar-width:thin;
}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:rgba(120,224,235,.25);border-radius:99px;}
.rail::-webkit-scrollbar-track{background:transparent;}
.rail-item{flex:0 0 280px;scroll-snap-align:start;}
@media(max-width:767px){.rail-item{flex:0 0 240px;}}
.rail-nav{display:flex;gap:10px;}
.rail-nav button:hover{color:var(--accent);border-color:var(--accent);}
.rail-cover{aspect-ratio:3/2;}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--glass);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid var(--glass-border);border-radius:18px;
  padding:26px 24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  box-shadow:var(--shadow-float);
}
.cta-band::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,var(--accent),rgba(47,227,196,0));
}
.cta-band p{font-size:16px;font-weight:600;}
.cta-band .sub{font-size:13px;color:var(--text-3);font-weight:400;margin-top:4px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- FAQ ---------- */
.faq{max-width:800px;margin:0 auto;border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);transition:background-color .22s var(--ease);border-radius:12px;}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 14px;font-size:17px;font-weight:600;color:var(--text-1);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary::after{content:"+";font-size:22px;font-weight:400;color:var(--text-3);transition:color .22s var(--ease);}
.faq details[open]{background:var(--surface);}
.faq details[open] summary{color:var(--accent);}
.faq details[open] summary::after{content:"–";color:var(--accent);}
.faq .answer{padding:0 14px 22px;font-size:16px;line-height:1.9;color:var(--text-2);max-width:720px;}

/* ---------- 表单 ---------- */
.form-panel{
  max-width:720px;margin:0 auto;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:28px 24px;box-shadow:var(--shadow-card);
}
.form-panel h3{font-size:20px;font-weight:650;margin-bottom:8px;}
.form-panel .hint{font-size:14px;color:var(--text-3);margin-bottom:20px;}
.form-row{display:flex;flex-wrap:wrap;gap:14px;}
.field{flex:1 1 260px;}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:8px;}
.field input{
  width:100%;padding:13px 14px;border-radius:var(--radius-btn);
  background:var(--surface-2);border:1px solid var(--line);color:var(--text-1);
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.field input::placeholder{color:var(--text-3);}
.field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,227,196,.16);}
.form-note{font-size:12px;color:var(--accent-2);margin-top:10px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:56px 0 28px;margin-top:24px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.4fr .8fr .8fr .8fr 1fr;gap:40px;}}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-3);line-height:1.9;max-width:320px;}
.footer-col h4{font-size:14px;color:var(--text-2);font-weight:600;margin-bottom:16px;letter-spacing:.02em;}
.footer-col li{margin-bottom:10px;}
.footer-col a,.footer-col span{font-size:15px;color:var(--text-1);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom .mono{font-family:var(--font-mono);}

@media(prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .card:hover{transform:none;}
  .toc-row:hover{transform:none;}
}

/* roulang page: article */
:root{
  --bg-base:#061017;
  --bg-deep:#030A0F;
  --surface:#0B1B26;
  --surface-2:#102A38;
  --glass:rgba(18,42,56,.55);
  --glass-border:rgba(120,224,235,.14);
  --accent:#2FE3C4;
  --accent-ink:#04151A;
  --accent-2:#FFB454;
  --text-1:#E8F3F7;
  --text-2:#9DB4C0;
  --text-3:#6B8391;
  --line:rgba(255,255,255,.08);
  --r-card:18px;
  --r-img:14px;
  --r-btn:12px;
  --shadow-card:0 18px 48px -24px rgba(0,0,0,.75);
  --shadow-float:0 30px 80px -30px rgba(0,0,0,.85);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:'HarmonyOS Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:ui-monospace,'SFMono-Regular',Consolas,'Liberation Mono',monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
html body{
  margin:0;
  padding:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.9;
  color:var(--text-1);
  background:
    radial-gradient(1100px 620px at 12% -10%, rgba(47,227,196,.09), transparent 62%),
    radial-gradient(900px 560px at 92% 4%, rgba(255,180,84,.05), transparent 60%),
    var(--bg-base);
  min-height:100vh;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){ .container{padding:0 32px;} }

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:transparent;
  transition:background .24s var(--ease),backdrop-filter .24s var(--ease),border-color .24s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(6,16,23,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:60px;}
@media (min-width:1024px){ .nav-wrap{height:72px;} }
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  display:grid;place-items:center;
  font-weight:800;font-size:17px;
  color:var(--accent-ink);
  background:linear-gradient(150deg,var(--accent),#1BB79C);
  box-shadow:0 10px 28px -14px rgba(47,227,196,.85);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em;}
.brand-text small{font-size:11px;color:var(--text-3);letter-spacing:.08em;}
.nav-main{display:none;align-items:center;gap:26px;}
@media (min-width:1024px){ .nav-main{display:flex;} }
.nav-link{
  position:relative;
  font-size:15px;color:var(--text-2);
  padding:6px 0;
  transition:color .2s var(--ease);
  background:none;border:0;cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover,.nav-link:focus-visible{color:var(--text-1);}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--text-1);}
.nav-link.is-active::after{transform:scaleX(1);}
.caret{width:0;height:0;border-left:4px solid transparent;border-right:4px solid transparent;border-top:5px solid currentColor;opacity:.7;}
.nav-more{position:relative;}
.mega{
  position:absolute;right:0;top:calc(100% + 16px);width:760px;
  display:grid;grid-template-columns:1.25fr .95fr;gap:28px;
  padding:24px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px);
  backdrop-filter:blur(16px);
  border:1px solid var(--glass-border);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-float);
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .16s var(--ease),transform .16s var(--ease),visibility .16s var(--ease);
}
.mega::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  border-radius:var(--r-card) var(--r-card) 0 0;
}
.nav-more:hover .mega,
.nav-more:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega-title{font-size:12px;letter-spacing:.14em;color:var(--text-3);margin-bottom:14px;}
.mega-list li a{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;border-radius:10px;font-size:14px;color:var(--text-1);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.mega-list li a .mono{font-size:12px;color:var(--accent);opacity:.85;}
.mega-list li a .hint{margin-left:auto;font-size:12px;color:var(--text-3);}
.mega-list li a:hover{background:rgba(47,227,196,.08);color:var(--accent);}
.mega-news li a{
  display:flex;justify-content:space-between;gap:12px;
  padding:9px 0;font-size:14px;color:var(--text-2);
  border-bottom:1px solid var(--line);
  transition:color .2s var(--ease);
}
.mega-news li a time{font-family:var(--font-mono);font-size:12px;color:var(--accent-2);}
.mega-news li a:hover{color:var(--accent);}
.mega-card{
  margin-top:16px;padding:14px;border-radius:14px;background:var(--surface);
  border:1px solid var(--line);display:flex;gap:12px;align-items:center;
}
.mega-card img{width:64px;height:44px;object-fit:cover;border-radius:10px;background:var(--surface-2);}
.mega-card p{font-size:13px;color:var(--text-2);line-height:1.6;}
.mega-card a{color:var(--accent);font-size:13px;font-weight:600;}
.nav-toggle{
  display:grid;place-items:center;gap:4px;
  width:40px;height:40px;border-radius:10px;
  background:rgba(47,227,196,.06);border:1px solid var(--glass-border);cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-1);}
@media (min-width:1024px){ .nav-toggle{display:none;} }

/* ---------- 移动抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:200;
  background:rgba(3,10,15,.96);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  transform:translateX(100%);
  transition:transform .26s var(--ease);
  display:flex;flex-direction:column;
  padding:18px 20px 28px;
  overflow-y:auto;
}
.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:10px;border:1px solid var(--glass-border);
  background:transparent;color:var(--text-1);font-size:22px;line-height:1;cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;margin:28px 0 auto;}
.drawer-link{
  font-size:20px;font-weight:600;color:var(--text-2);
  padding:15px 0;border-bottom:1px solid var(--line);
  transition:color .2s var(--ease),padding-left .2s var(--ease);
}
.drawer-link:hover,.drawer-link.is-active{color:var(--accent);padding-left:6px;}
.drawer-note{margin:20px 0 18px;font-size:13px;color:var(--text-3);}
.drawer-cta{display:flex;justify-content:center;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn-primary{background:var(--accent);color:var(--accent-ink);}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 14px 40px -10px rgba(47,227,196,.6);}
.btn-primary:active{box-shadow:none;transform:translateY(1px);}
.btn-ghost{background:transparent;border-color:var(--glass-border);color:var(--text-1);}
.btn-ghost:hover{border-color:var(--accent);background:rgba(47,227,196,.08);color:var(--accent);}
.btn-text{
  background:none;border:0;padding:4px 0;color:var(--accent);font-weight:600;font-size:15px;
  text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px;
  cursor:pointer;
}
.btn-text:hover{text-decoration-color:var(--accent-2);color:var(--accent-2);}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:26px 0 6px;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2);}
.breadcrumb a{color:var(--text-2);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{color:var(--text-3);}
.breadcrumb .now{color:var(--text-1);max-width:340px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}

/* ---------- 文章头 ---------- */
.article-head{
  max-width:800px;margin:0 auto;padding:26px 0 26px;
  border-bottom:1px solid var(--line);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;padding:4px 12px;border-radius:999px;
  border:1px solid rgba(255,180,84,.45);color:var(--accent-2);
  background:rgba(255,180,84,.07);
}
.article-head h1{
  font-size:28px;font-weight:700;line-height:1.28;letter-spacing:.01em;
  margin:16px 0 18px;color:var(--text-1);
}
@media (min-width:768px){ .article-head h1{font-size:32px;} }
@media (min-width:1024px){ .article-head h1{font-size:36px;} }
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;
  font-size:14px;color:var(--text-2);
}
.article-meta time{font-family:var(--font-mono);color:var(--accent-2);}
.article-meta .dot{color:var(--text-3);}
.meta-actions{margin-left:auto;display:flex;gap:10px;}
.icon-btn{
  width:40px;height:40px;border-radius:10px;
  display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--glass-border);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  color:var(--text-1);cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.icon-btn:hover{color:var(--accent);border-color:var(--accent);background:rgba(47,227,196,.08);}

/* ---------- 正文排版 ---------- */
.article-main{padding:8px 0 72px;}
.article-body{
  max-width:760px;margin:0 auto;padding-top:34px;
  font-size:17px;line-height:1.9;color:var(--text-1);
}
.article-body p{margin:0 0 20px;}
.article-body h2{
  position:relative;
  font-size:24px;font-weight:650;line-height:1.4;letter-spacing:.01em;
  margin:42px 0 16px;padding-left:16px;color:var(--text-1);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.42em;width:3px;height:1.05em;
  border-radius:2px;background:var(--accent);
}
@media (min-width:768px){ .article-body h2{font-size:28px;} }
.article-body h3{font-size:20px;font-weight:650;margin:32px 0 12px;color:var(--text-1);}
.article-body h4{font-size:17px;font-weight:650;margin:24px 0 10px;color:var(--text-1);}
.article-body a{color:var(--accent);text-decoration:underline;text-underline-offset:5px;}
.article-body a:hover{color:var(--accent-2);}
.article-body strong{font-weight:650;color:#fff;}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:2px;}
.article-body li{position:relative;padding-left:22px;margin-bottom:10px;}
.article-body ul>li::before{
  content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;
  border-radius:1px;background:var(--accent);
}
.article-body ol{counter-reset:numlist;}
.article-body ol>li{counter-increment:numlist;padding-left:30px;}
.article-body ol>li::before{
  content:counter(numlist,decimal-leading-zero);
  position:absolute;left:0;top:0;font-family:var(--font-mono);font-size:13px;
  color:var(--accent);letter-spacing:.02em;
}
.article-body blockquote{
  margin:26px 0;padding:20px 22px;
  background:var(--glass);border-left:3px solid var(--accent);
  border-radius:0 var(--r-card) var(--r-card) 0;
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  color:var(--text-2);font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--r-img);margin:26px auto;background:var(--surface-2);}
.article-body figure{margin:26px 0;}
.article-body figcaption{
  font-size:13px;color:var(--text-3);text-align:center;margin-top:10px;line-height:1.7;
}
.article-body table{
  display:block;width:100%;overflow-x:auto;border-collapse:collapse;
  margin:26px 0;font-size:15px;
}
.article-body th,.article-body td{
  padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap;
}
.article-body thead th{color:var(--text-2);font-weight:650;border-bottom:1px solid rgba(120,224,235,.28);}
.article-body tbody tr:nth-child(odd){background:var(--surface);}
.article-body tbody tr:nth-child(even){background:var(--surface-2);}
.article-body code{
  font-family:var(--font-mono);font-size:14px;
  background:var(--surface-2);padding:2px 6px;border-radius:6px;color:var(--accent);
}
.article-body pre{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-img);
  padding:18px;overflow-x:auto;margin:24px 0;
}
.article-body pre code{background:none;padding:0;color:var(--text-1);font-size:14px;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}
.empty-article{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:18px;text-align:center;padding:40px 20px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
}
.empty-article p{font-size:16px;color:var(--text-2);}

/* ---------- 标签 / CTA / 推荐 ---------- */
.tag-row{
  max-width:760px;margin:44px auto 0;display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding-top:24px;border-top:1px solid var(--line);
}
.tag-label{font-size:13px;color:var(--text-3);letter-spacing:.1em;}
.tag{
  font-size:12px;padding:5px 12px;border-radius:999px;
  border:1px solid var(--glass-border);color:var(--text-2);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.tag:hover{color:var(--accent);border-color:var(--accent);background:rgba(47,227,196,.08);}

.cta-band{max-width:1000px;margin:64px auto 0;padding:0 20px;}
.cta-inner{
  position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:20px;
  padding:26px 28px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--glass-border);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  box-shadow:var(--shadow-float);
  overflow:hidden;
}
.cta-inner::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--accent),rgba(255,180,84,.6),transparent);
}
.cta-line{font-size:17px;font-weight:600;flex:1 1 260px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

.related{max-width:1000px;margin:0 auto;padding:72px 20px 0;}
.related-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:24px;}
.related-head h2{font-size:24px;font-weight:650;}
@media (min-width:768px){ .related-head h2{font-size:28px;} }
.related-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media (min-width:640px){ .related-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .related-grid{grid-template-columns:repeat(3,1fr);} }
.card{
  position:relative;display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card::before{
  content:"";position:absolute;left:16px;right:16px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(120,224,235,.35),transparent);
}
.card:hover{transform:translateY(-2px);border-color:var(--accent);}
.card:hover .card-title{color:var(--accent);}
.card:hover .card-cover img{transform:scale(1.04);}
.card-cover{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--surface-2);}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease);}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{font-size:18px;font-weight:650;line-height:1.5;transition:color .2s var(--ease);}
.card-desc{font-size:14px;line-height:1.8;color:var(--text-2);}
.card-foot{
  margin-top:auto;display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);font-family:var(--font-mono);
}
.card-foot .arrow{color:var(--accent);}

.back-link{max-width:1000px;margin:36px auto 0;padding:0 20px;}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:88px;border-top:1px solid var(--line);background:var(--bg-deep);padding:56px 0 26px;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr 1.1fr;gap:28px;} }
.footer-brand .brand{margin-bottom:14px;}
.footer-brand p{font-size:14px;line-height:1.9;color:var(--text-2);max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-2);margin-bottom:14px;letter-spacing:.04em;}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul li a,.footer-col ul li span{font-size:15px;color:var(--text-1);transition:color .2s var(--ease);line-height:1.7;}
.footer-col ul li a:hover{color:var(--accent);}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--text-3);
}
.footer-bottom .mono{color:var(--text-3);}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  .card:hover{transform:none;}
  .card:hover .card-cover img{transform:none;}
}

/* roulang page: category1 */
:root{
  --bg-base:#061017;
  --bg-deep:#030A0F;
  --surface:#0B1B26;
  --surface-2:#102A38;
  --glass:rgba(18,42,56,.55);
  --glass-border:rgba(120,224,235,.14);
  --accent:#2FE3C4;
  --accent-ink:#04151A;
  --accent-2:#FFB454;
  --text-1:#E8F3F7;
  --text-2:#9DB4C0;
  --text-3:#6B8391;
  --line:rgba(255,255,255,.08);
  --r-card:18px;
  --r-img:14px;
  --r-btn:12px;
  --sh-card:0 18px 48px -24px rgba(0,0,0,.75);
  --sh-float:0 30px 80px -30px rgba(0,0,0,.85);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:'HarmonyOS Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:ui-monospace,'SFMono-Regular',Consolas,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html body{
  margin:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.9;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none;transition:color 220ms var(--ease),border-color 220ms var(--ease),background-color 220ms var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{line-height:1.3;font-weight:650}
time{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1240px;margin:0 auto;padding-left:20px;padding-right:20px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color 240ms var(--ease),border-color 240ms var(--ease),backdrop-filter 240ms var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,16,23,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:60px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,rgba(47,227,196,.22),rgba(47,227,196,.05));
  border:1px solid var(--glass-border);
  color:var(--accent);font-family:var(--font-mono);font-size:19px;font-weight:700;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em}
.brand-text small{font-size:11px;color:var(--text-3);letter-spacing:.06em}
.nav-main{display:none;align-items:center;gap:22px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:6px 2px;font-size:15px;color:var(--text-2);
  border-bottom:2px solid transparent;
}
.nav-link:hover,.nav-link:focus-visible{color:var(--text-1)}
.nav-link.is-active{color:var(--text-1);border-bottom-color:var(--accent)}
.caret{width:7px;height:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-1px);display:inline-block}
.nav-more{position:relative}
.nav-more-btn{background:none}
.mega{
  position:absolute;right:0;top:calc(100% + 14px);width:720px;
  display:grid;grid-template-columns:1.15fr .85fr;gap:28px;
  padding:26px;border-radius:var(--r-card);
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border:1px solid var(--glass-border);
  box-shadow:var(--sh-float);
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity 160ms var(--ease),transform 160ms var(--ease),visibility 160ms;
}
.mega::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  border-radius:var(--r-card) var(--r-card) 0 0;
}
.nav-more:hover .mega,.nav-more:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:13px;color:var(--text-3);letter-spacing:.08em;margin-bottom:14px}
.mega-list li + li{margin-top:2px}
.mega-list a{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;font-size:15px;color:var(--text-1)}
.mega-list a:hover{background:rgba(47,227,196,.08);color:var(--accent)}
.mega-list .mono{font-size:12px;color:var(--accent);opacity:.8}
.mega-list .hint{margin-left:auto;font-size:12px;color:var(--text-3)}
.mega-news li{display:flex;justify-content:space-between;gap:12px;padding:9px 2px;font-size:14px;color:var(--text-2);border-bottom:1px solid var(--line)}
.mega-news li a:hover{color:var(--accent)}
.mega-news time{font-size:12px;color:var(--text-3);white-space:nowrap}
.mega-card{display:block;margin-top:16px;padding:12px;border-radius:14px;background:var(--surface);border:1px solid var(--line)}
.mega-card img{width:100%;height:88px;object-fit:cover;background:var(--surface-2);margin-bottom:10px}
.mega-card span{display:block;font-size:14px;color:var(--text-2)}
.mega-card-btn{display:inline-block!important;margin-top:10px;padding:7px 14px;border-radius:10px;background:var(--accent);color:var(--accent-ink)!important;font-size:13px;font-weight:600;box-shadow:0 10px 30px -12px rgba(47,227,196,.7)}
.nav-toggle{
  width:40px;height:40px;border-radius:10px;border:1px solid var(--glass-border);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:1.6px;background:var(--text-1);border-radius:2px}
.nav-toggle:hover{border-color:var(--accent)}
.drawer{
  position:fixed;inset:0;z-index:120;background:rgba(3,10,15,.96);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  padding:80px 24px 40px;
  transform:translateY(-100%);opacity:0;visibility:hidden;
  transition:transform 260ms var(--ease),opacity 260ms var(--ease),visibility 260ms;
  overflow-y:auto;
}
.drawer.is-open{transform:translateY(0);opacity:1;visibility:visible}
.drawer-close{
  position:fixed;top:16px;right:20px;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--glass-border);font-size:22px;line-height:1;color:var(--text-2);
}
.drawer-close:hover{border-color:var(--accent);color:var(--accent)}
.drawer-nav > a{display:block;padding:16px 4px;font-size:20px;font-weight:600;border-bottom:1px solid var(--line)}
.drawer-nav > a:hover{color:var(--accent)}
.drawer details{border-bottom:1px solid var(--line)}
.drawer summary{padding:16px 4px;font-size:20px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}
.drawer summary::-webkit-details-marker{display:none}
.drawer summary::after{content:"+";color:var(--accent);font-family:var(--font-mono)}
.drawer details[open] summary::after{content:"−"}
.drawer details a{display:block;padding:12px 4px 12px 16px;font-size:16px;color:var(--text-2);border-top:1px dashed rgba(255,255,255,.06)}
.drawer details a:hover{color:var(--accent)}
.drawer-cta{margin-top:28px;display:block;text-align:center}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-weight:600;font-size:15px;
  padding:13px 24px;border:1px solid transparent;
  transition:background-color 220ms var(--ease),color 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease),transform 220ms var(--ease);
}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{background:#3ff0d2;box-shadow:0 14px 40px -10px rgba(47,227,196,.6)}
.btn-primary:active{box-shadow:0 0 0 0 rgba(47,227,196,0);transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--glass-border);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--accent);background:rgba(47,227,196,.08);color:var(--accent)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;color:var(--text-1);
  border-bottom:2px solid rgba(47,227,196,.5);padding-bottom:2px;
}
.btn-text:hover{color:var(--accent);border-bottom-color:var(--accent)}
.icon-btn{
  width:40px;height:40px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--glass-border);background:var(--glass);color:var(--text-2);font-size:15px;
}
.icon-btn:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  margin-top:-60px;padding:130px 0 46px;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(3,10,15,.78) 0%,rgba(6,16,23,.93) 62%,rgba(6,16,23,1) 100%);
}
.page-hero .container{position:relative;z-index:2}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2);margin-bottom:18px}
.crumb a:hover{color:var(--accent)}
.crumb .sep{color:var(--text-3)}
.crumb li{display:inline-flex;align-items:center;gap:8px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.04em;
  padding:5px 12px;border-radius:999px;border:1px solid rgba(255,180,84,.45);
  color:var(--accent-2);background:rgba(255,180,84,.08);margin-bottom:18px;
}
.page-hero h1{
  font-size:32px;font-weight:700;line-height:1.15;letter-spacing:.01em;
  max-width:820px;
}
.page-hero h1 em{font-style:normal;color:var(--accent)}
.hero-sub{margin-top:16px;font-size:16px;color:var(--text-2);max-width:640px}

/* ---------- subnav ---------- */
.subnav{
  position:sticky;top:60px;z-index:70;
  background:rgba(6,16,23,.9);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.subnav-inner{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding:10px 0}
.subnav-inner::-webkit-scrollbar{display:none}
.subnav a{
  flex:none;padding:8px 16px;border-radius:999px;font-size:14px;color:var(--text-2);
  border:1px solid transparent;white-space:nowrap;
}
.subnav a:hover{color:var(--accent);border-color:var(--glass-border)}
.subnav a.is-current{color:var(--accent-ink);background:var(--accent);font-weight:600}

/* ---------- sections ---------- */
.section{padding:56px 0}
.section-line{border-top:1px solid var(--line)}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.sec-head h2{font-size:24px;font-weight:650;letter-spacing:.01em}
.sec-head h2 span{color:var(--accent);font-family:var(--font-mono);font-size:15px;margin-right:10px;vertical-align:middle}
.sec-desc{margin-top:10px;font-size:15px;color:var(--text-2);max-width:720px}

/* ---------- 编号目录流 ---------- */
.toc-list{border-top:1px solid var(--line)}
.toc-row{
  display:grid;grid-template-columns:48px minmax(0,1fr) auto;align-items:center;gap:16px;
  min-height:76px;padding:12px 14px;border-bottom:1px solid var(--line);
  transition:background-color 220ms var(--ease),transform 220ms var(--ease);
}
.toc-row:hover{background:var(--glass);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.toc-num{
  font-family:var(--font-mono);font-size:26px;font-weight:700;line-height:1;
  color:transparent;-webkit-text-stroke:1px rgba(47,227,196,.35);
  transition:color 220ms var(--ease),-webkit-text-stroke-color 220ms var(--ease);
  font-variant-numeric:tabular-nums;
}
.toc-row:hover .toc-num{color:var(--accent);-webkit-text-stroke:1px rgba(47,227,196,0)}
.toc-main h3{font-size:18px;font-weight:650;transition:color 220ms var(--ease)}
.toc-row:hover .toc-main h3{color:var(--accent)}
.toc-main p{margin-top:4px;font-size:14px;color:var(--text-2);overflow:hidden;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}
.toc-side{display:flex;align-items:center;gap:16px}
.toc-tag{
  font-size:12px;padding:3px 10px;border-radius:999px;white-space:nowrap;
  border:1px solid rgba(255,180,84,.4);color:var(--accent-2);background:rgba(255,180,84,.07);
}
.toc-arrow{color:var(--text-3);font-size:16px;transition:transform 220ms var(--ease),color 220ms var(--ease)}
.toc-row:hover .toc-arrow{color:var(--accent);transform:translateX(4px)}
.toc-sum{
  display:flex;flex-wrap:wrap;gap:10px 32px;margin-top:22px;padding:16px 18px;
  border-radius:var(--r-card);background:var(--surface);border:1px solid var(--line);
  font-family:var(--font-mono);font-size:13px;color:var(--text-2);font-variant-numeric:tabular-nums;
}
.toc-sum b{color:var(--accent);font-weight:600}

/* ---------- 适用场景 ---------- */
.fit-grid{display:grid;grid-template-columns:1fr;gap:0;border-top:1px solid var(--line)}
.fit-item{padding:26px 0;border-bottom:1px solid var(--line)}
.fit-item h3{font-size:18px;font-weight:650;margin-bottom:10px}
.fit-item h3 span{font-family:var(--font-mono);font-size:13px;color:var(--accent);margin-right:10px}
.fit-item p{font-size:15px;color:var(--text-2);line-height:1.9;max-width:760px}
.fit-note{margin-top:24px;font-size:14px;color:var(--text-3)}

/* ---------- 流程 ---------- */
.flow{display:grid;grid-template-columns:1fr;gap:16px}
.flow-step{
  position:relative;padding:22px 20px;border-radius:var(--r-card);
  background:var(--surface);border:1px solid var(--line);
  box-shadow:var(--sh-card);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease);
}
.flow-step::before{
  content:"";position:absolute;left:0;top:0;height:1px;right:0;
  background:linear-gradient(90deg,rgba(47,227,196,.5),transparent);
  border-radius:var(--r-card) var(--r-card) 0 0;
}
.flow-step:hover{transform:translateY(-2px);border-color:rgba(47,227,196,.4)}
.flow-step .mono{font-size:13px;color:var(--accent);letter-spacing:.08em}
.flow-step h3{margin-top:10px;font-size:17px;font-weight:650}
.flow-step p{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.85}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{border-top:1px solid var(--line);transition:background-color 220ms var(--ease)}
.faq-item:last-of-type{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 16px;font-size:17px;cursor:pointer;list-style:none;
  transition:color 220ms var(--ease),background-color 220ms var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-family:var(--font-mono);font-size:20px;color:var(--accent);flex:none;
}
.faq-item[open] summary::after{content:"−"}
.faq-item summary:hover{color:var(--accent)}
.faq-item[open]{background:var(--surface);border-radius:12px}
.faq-item[open] summary{color:var(--accent)}
.faq-body{padding:0 16px 22px;font-size:16px;line-height:1.9;color:var(--text-2)}

/* ---------- 交叉推荐 ---------- */
.cross-list{display:grid;grid-template-columns:1fr;gap:16px}
.cross-card{
  display:grid;grid-template-columns:96px minmax(0,1fr) auto;gap:16px;align-items:center;
  padding:14px;border-radius:var(--r-card);background:var(--surface);
  border:1px solid var(--line);box-shadow:var(--sh-card);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease);
}
.cross-card:hover{transform:translateY(-2px);border-color:rgba(47,227,196,.42)}
.cross-card img{width:96px;height:66px;object-fit:cover;background:var(--surface-2)}
.cross-card h3{font-size:17px;font-weight:650}
.cross-card:hover h3{color:var(--accent)}
.cross-card p{margin-top:6px;font-size:14px;color:var(--text-2);overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.cross-go{font-size:14px;color:var(--accent);white-space:nowrap}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;gap:20px;
  padding:28px 24px;border-radius:var(--r-card);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid var(--glass-border);
  box-shadow:var(--sh-float);
}
.cta-band::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--accent),rgba(255,180,84,.7),transparent);
}
.cta-band h2{font-size:20px;font-weight:650}
.cta-band p{margin-top:8px;font-size:14px;color:var(--text-2)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- form ---------- */
.find-wrap{max-width:720px;margin:0 auto}
.find-form{padding:26px 22px;border-radius:var(--r-card);background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-card)}
.find-form label{display:block;font-size:13px;color:var(--text-2);margin-bottom:10px}
.find-row{display:flex;flex-direction:column;gap:12px}
.find-form input[type="search"]{
  width:100%;padding:13px 16px;border-radius:var(--r-btn);
  background:var(--surface-2);border:1px solid var(--line);color:var(--text-1);font-size:15px;
  transition:border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.find-form input[type="search"]::placeholder{color:var(--text-3)}
.find-form input[type="search"]:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,227,196,.15)}
.form-note{margin-top:14px;font-size:13px;color:var(--text-3)}
.form-note.warn{color:var(--accent-2)}

/* ---------- footer ---------- */
.site-footer{margin-top:56px;border-top:1px solid var(--line);background:var(--bg-deep);padding:56px 0 28px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--text-2);line-height:1.85;max-width:340px}
.footer-col h4{font-size:14px;color:var(--text-2);font-weight:600;margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:15px;color:var(--text-1)}
.footer-col a:hover{color:var(--accent)}
.footer-col span{font-size:14px;color:var(--text-2)}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--text-3);
}

@media (min-width:640px){
  .page-hero h1{font-size:38px}
  .sec-head h2{font-size:28px}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .find-row{flex-direction:row}
  .find-row input[type="search"]{flex:1}
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:30px 32px}
  .cta-band h2{font-size:22px}
  .cross-card{grid-template-columns:120px minmax(0,1fr) auto}
  .cross-card img{width:120px;height:80px}
}
@media (min-width:768px){
  .nav-wrap{height:72px}
  .page-hero{margin-top:-72px;padding:150px 0 60px;min-height:320px;display:flex;align-items:flex-end}
  .page-hero h1{font-size:42px}
  .subnav{top:72px}
  .section{padding:72px 0}
  .fit-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:0}
  .fit-item{padding:28px 28px 28px 0;border-bottom:0;border-right:1px solid var(--line)}
  .fit-item:last-child{border-right:0;padding-right:0}
  .toc-row{grid-template-columns:64px minmax(0,1fr) auto;padding:12px 18px}
  .toc-num{font-size:30px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr 1.1fr;gap:28px}
}
@media (min-width:1024px){
  .container{padding-left:32px;padding-right:32px}
  .nav-main{display:flex}
  .nav-toggle{display:none}
  .page-hero h1{font-size:54px}
  .flow{grid-template-columns:repeat(4,minmax(0,1fr))}
  .cross-list{grid-template-columns:repeat(3,minmax(0,1fr))}
  .cross-card{grid-template-columns:1fr;gap:0}
  .cross-card img{width:100%;height:150px;margin-bottom:16px}
  .cross-go{margin-top:14px;display:inline-block}
  .section{padding:96px 0}
  .sec-head h2{font-size:32px}
}
@media (max-width:1023px){
  .mega{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .toc-row:hover,.flow-step:hover,.cross-card:hover{transform:none!important}
}

/* roulang page: category2 */
:root{
  --bg-base:#061017;--bg-deep:#030A0F;--surface:#0B1B26;--surface-2:#102A38;
  --glass:rgba(18,42,56,.55);--glass-border:rgba(120,224,235,.14);
  --accent:#2FE3C4;--accent-ink:#04151A;--accent-2:#FFB454;
  --text-1:#E8F3F7;--text-2:#9DB4C0;--text-3:#6B8391;--line:rgba(255,255,255,.08);
  --r-card:18px;--r-img:14px;--r-btn:12px;
  --sh-card:0 18px 48px -24px rgba(0,0,0,.75);
  --sh-float:0 30px 80px -30px rgba(0,0,0,.85);
  --ease:cubic-bezier(.2,.7,.3,1);
  --nav-h:72px;
  --font:'HarmonyOS Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --mono:ui-monospace,'SFMono-Regular',Consolas,monospace;
}
@media (max-width:1023px){:root{--nav-h:60px}}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 84px)}
body{
  margin:0;background:var(--bg-base);color:var(--text-1);font-family:var(--font);
  font-size:17px;line-height:1.9;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease)}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
h1{font-size:32px;font-weight:700;line-height:1.15;letter-spacing:.01em}
h2{font-size:24px;font-weight:650;line-height:1.3}
h3{font-size:18px;font-weight:600;line-height:1.45}
p{color:var(--text-2)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}
@media (min-width:768px){h1{font-size:42px}}
@media (min-width:1024px){h1{font-size:54px}}
@media (min-width:768px){h2{font-size:32px}}
@media (min-width:768px){h3{font-size:20px}}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;border-bottom:1px solid transparent;
  transition:background .24s var(--ease),border-color .24s var(--ease),backdrop-filter .24s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,16,23,.86);backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:28px;height:var(--nav-h)}
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--accent),#1B8C9C);color:var(--accent-ink);
  font-family:var(--mono);font-weight:700;font-size:18px;
  box-shadow:0 10px 30px -12px rgba(47,227,196,.6);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;font-weight:700;letter-spacing:.01em}
.brand-text small{font-size:12px;color:var(--text-3);letter-spacing:.06em}
.nav-main{display:none;align-items:center;gap:28px;margin-left:auto}
@media (min-width:1024px){.nav-main{display:flex}}
.nav-link{
  position:relative;font-size:15px;color:var(--text-2);padding:6px 0;
  background:none;border:0;cursor:pointer;display:inline-flex;align-items:center;gap:6px;
}
.nav-link:hover,.nav-link:focus-visible{color:var(--text-1)}
.nav-link.is-active{color:var(--text-1);font-weight:600}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;
  background:var(--accent);border-radius:2px;
  box-shadow:0 0 16px rgba(47,227,196,.7);
}
.caret{width:7px;height:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px)}
.nav-more{position:relative}
.mega{
  position:absolute;top:calc(100% + 18px);right:0;width:760px;
  display:grid;grid-template-columns:1.25fr 1fr;gap:28px;padding:26px;
  background:var(--glass);backdrop-filter:blur(16px);
  border:1px solid var(--glass-border);border-radius:var(--r-card);
  box-shadow:var(--sh-float);
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .16s var(--ease),transform .16s var(--ease),visibility .16s;
}
.mega::before{
  content:"";position:absolute;left:26px;right:26px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
}
.nav-more:hover .mega,.nav-more:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:13px;color:var(--text-3);letter-spacing:.08em;margin-bottom:14px}
.mega-list li+li{margin-top:4px}
.mega-list a{
  display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;
  font-size:14px;color:var(--text-1);transition:background .2s var(--ease),color .2s var(--ease);
}
.mega-list a:hover{background:rgba(47,227,196,.08);color:var(--accent)}
.mega-list .mono{color:var(--text-3);font-size:12px}
.mega-list .hint{font-size:12px;color:var(--text-3);margin-left:auto}
.mega-news li+li{margin-top:10px}
.mega-news a{display:block;font-size:14px;color:var(--text-1)}
.mega-news a:hover{color:var(--accent)}
.mega-news time{display:block;font-size:12px;color:var(--text-3);font-family:var(--mono)}
.mega-card{
  margin-top:16px;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  background:rgba(11,27,38,.7);
}
.mega-card img{aspect-ratio:16/10;object-fit:cover;border-radius:0;background:var(--surface-2)}
.mega-card-body{padding:12px}
.mega-card-body p{font-size:13px;line-height:1.7}
.mega-card-body .btn-ghost{margin-top:10px;padding:8px 14px;font-size:13px}

.nav-toggle{
  display:inline-grid;place-items:center;width:40px;height:40px;margin-left:auto;
  background:rgba(16,42,56,.6);border:1px solid var(--glass-border);border-radius:10px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--text-1);margin:2.5px 0;transition:transform .22s var(--ease),opacity .22s var(--ease)}
@media (min-width:1024px){.nav-toggle{display:none}}
.mobile-drawer{
  position:fixed;inset:0;z-index:120;background:rgba(3,10,15,.97);
  backdrop-filter:blur(6px);display:none;overflow-y:auto;padding:24px 20px 48px;
}
.mobile-drawer.is-open{display:block}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--glass-border);background:transparent;font-size:20px;line-height:1;cursor:pointer}
.drawer-nav a{display:block;font-size:20px;font-weight:600;padding:14px 0;border-bottom:1px solid var(--line)}
.drawer-nav a.is-active{color:var(--accent)}
.drawer-cta{margin-top:32px}
.drawer-cta .btn-primary{width:100%;justify-content:center}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--r-btn);font-weight:600;font-size:15px;padding:14px 26px;border:1px solid transparent;cursor:pointer;transition:all .22s var(--ease)}
.btn-primary{background:var(--accent);color:var(--accent-ink)}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 14px 40px -10px rgba(47,227,196,.6)}
.btn-primary:active{box-shadow:none;transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--glass-border);color:var(--text-1);padding:13px 24px}
.btn-ghost:hover{border-color:var(--accent);background:rgba(47,227,196,.08)}
.btn-text{background:none;border:0;padding:0;color:var(--accent);font-weight:600;text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:2px;text-decoration-color:rgba(47,227,196,.35);cursor:pointer}
.btn-text:hover{text-decoration-color:var(--accent)}
.icon-btn{width:40px;height:40px;display:grid;place-items:center;border-radius:10px;background:var(--glass);border:1px solid var(--glass-border);cursor:pointer;transition:all .22s var(--ease)}
.icon-btn:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- Badge / Section ---------- */
.badge{display:inline-flex;align-items:center;font-size:12px;padding:3px 12px;border-radius:999px;border:1px solid rgba(255,180,84,.4);color:var(--accent-2);letter-spacing:.02em}
.badge-outline{border-color:var(--glass-border);color:var(--text-2)}
.section{padding:56px 0;border-top:1px solid var(--line)}
@media (min-width:768px){.section{padding:96px 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px;flex-wrap:wrap}
.section-head p{font-size:15px;max-width:640px;margin-top:10px}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;margin-top:calc(-1 * var(--nav-h));
  padding:calc(var(--nav-h) + 48px) 0 48px;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  border-bottom:1px solid var(--line);
}
.page-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,16,23,.82),rgba(6,16,23,.95))}
.page-hero::after{
  content:"";position:absolute;inset:0;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
}
.page-hero .container{position:relative;z-index:1}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2);margin-bottom:20px}
.crumb a:hover{color:var(--accent)}
.crumb .sep{color:var(--text-3)}
.hero-lead{margin-top:18px;font-size:16px;color:var(--text-2);max-width:720px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
@media (min-width:768px){.page-hero{padding:calc(var(--nav-h) + 72px) 0 72px}}

/* ---------- Anchor bar ---------- */
.anchor-bar{
  position:sticky;top:var(--nav-h);z-index:40;
  background:rgba(6,16,23,.92);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.anchor-scroll{display:flex;gap:8px;overflow-x:auto;padding:12px 0;scrollbar-width:none}
.anchor-scroll::-webkit-scrollbar{display:none}
.anchor-scroll a{
  flex:0 0 auto;font-size:14px;padding:8px 16px;border-radius:999px;
  color:var(--text-2);border:1px solid transparent;transition:all .2s var(--ease);white-space:nowrap;
}
.anchor-scroll a:hover{color:var(--text-1);border-color:var(--glass-border);background:rgba(47,227,196,.06)}
.anchor-scroll a.is-current{color:var(--accent);border-color:rgba(47,227,196,.4);background:rgba(47,227,196,.08)}

/* ---------- Timeline ---------- */
.timeline{position:relative;margin-top:8px}
.timeline::before{content:"";position:absolute;top:10px;bottom:10px;left:128px;width:1px;background:var(--line)}
.tl-item{position:relative;display:grid;grid-template-columns:112px 1fr;gap:32px;padding-bottom:32px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:124px;top:12px;width:9px;height:9px;border-radius:50%;
  background:var(--bg-base);border:1px solid var(--accent);transition:background .22s var(--ease),box-shadow .22s var(--ease);
}
.tl-item:hover::before{background:var(--accent);box-shadow:0 0 14px rgba(47,227,196,.7)}
.tl-time{display:flex;flex-direction:column;gap:4px;padding-top:6px;text-align:right}
.tl-time .num{font-family:var(--mono);font-size:26px;line-height:1;color:transparent;-webkit-text-stroke:1px rgba(47,227,196,.5);font-variant-numeric:tabular-nums;transition:color .22s var(--ease)}
.tl-item:hover .tl-time .num{color:var(--accent)}
.tl-time time{font-family:var(--mono);font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums}
.tl-body{
  background:var(--surface);border:1px solid var(--line);border-top:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-card);padding:22px 24px;box-shadow:var(--sh-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.tl-item:hover .tl-body{transform:translateY(-2px);border-color:rgba(47,227,196,.35)}
.tl-body h3{transition:color .22s var(--ease)}
.tl-item:hover .tl-body h3{color:var(--accent)}
.tl-body p{margin-top:10px;font-size:16px;line-height:1.9;max-width:720px}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
@media (max-width:767px){
  .timeline::before{left:4px}
  .tl-item{grid-template-columns:1fr;gap:12px;padding-left:28px}
  .tl-item::before{left:0;top:8px}
  .tl-time{flex-direction:row;align-items:baseline;gap:12px;text-align:left;padding-top:0}
  .tl-time .num{font-size:20px}
  .tl-body{padding:18px}
}

/* ---------- Lookup table ---------- */
.lookup{max-width:900px;border-top:1px solid var(--line)}
.lookup-row{display:grid;grid-template-columns:200px 1fr;gap:24px;padding:20px 4px;border-bottom:1px solid var(--line);transition:background .2s var(--ease)}
.lookup-row:hover{background:var(--surface-2)}
.lookup-row dt{font-size:14px;color:var(--text-3);letter-spacing:.02em}
.lookup-row dd{margin:0;font-size:16px;color:var(--text-1)}
.lookup-row dd .mono{color:var(--accent)}
@media (max-width:767px){
  .lookup-row{grid-template-columns:1fr;gap:6px;padding:16px 4px}
}

/* ---------- Related cards ---------- */
.card-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media (min-width:768px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-top:1px solid rgba(255,255,255,.12);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-card);transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:var(--accent)}
.card-cover{aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.card-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .24s var(--ease)}
.card:hover .card-cover img{transform:scale(1.04)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{transition:color .22s var(--ease)}
.card:hover .card-body h3{color:var(--accent)}
.card-body p{font-size:14px;line-height:1.8}
.card-foot{margin-top:auto;display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ---------- Form ---------- */
.form-wrap{max-width:720px}
.form-row{display:flex;flex-direction:column;gap:16px}
@media (min-width:640px){.form-row{flex-direction:row;align-items:flex-end}}
.field{flex:1}
.field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:8px}
.field input{
  width:100%;padding:14px 16px;background:var(--surface-2);border:1px solid var(--line);
  border-radius:var(--r-btn);color:var(--text-1);transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.field input::placeholder{color:var(--text-3)}
.field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,227,196,.16)}
.form-note{margin-top:14px;font-size:14px;color:var(--text-3)}
.form-note.is-warn{color:var(--accent-2)}
.form-static{margin-top:10px;font-size:14px;color:var(--accent);display:none}
.form-static.is-on{display:block}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;background:var(--glass);backdrop-filter:blur(14px);
  border:1px solid var(--glass-border);border-radius:var(--r-card);
  padding:28px;display:flex;flex-direction:column;gap:20px;overflow:hidden;
}
.cta-band::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:linear-gradient(90deg,transparent,var(--accent),transparent)}
.cta-band p{font-size:17px;color:var(--text-1);font-weight:600}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media (min-width:768px){
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:28px 36px}
}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);padding:64px 0 32px;background:var(--bg-deep);margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.8fr 1fr 1fr 1fr 1.2fr;gap:28px}}
.footer-brand p{font-size:14px;line-height:1.9;margin-top:16px;max-width:340px}
.footer-col h4{font-size:14px;color:var(--text-2);font-weight:600;margin-bottom:16px}
.footer-col li+li{margin-top:10px}
.footer-col a,.footer-col span{font-size:15px;color:var(--text-1)}
.footer-col a:hover{color:var(--accent)}
.footer-col span{color:var(--text-2);font-size:14px}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--text-3);
}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .card:hover,.tl-item:hover .tl-body{transform:none}
  .card:hover .card-cover img{transform:none}
}

/* roulang page: category3 */
:root{
    --bg-base:#061017;
    --bg-deep:#030A0F;
    --surface:#0B1B26;
    --surface-2:#102A38;
    --glass:rgba(18,42,56,.55);
    --glass-border:rgba(120,224,235,.14);
    --accent:#2FE3C4;
    --accent-ink:#04151A;
    --accent-2:#FFB454;
    --text-1:#E8F3F7;
    --text-2:#9DB4C0;
    --text-3:#6B8391;
    --line:rgba(255,255,255,.08);
    --r-card:18px;
    --r-img:14px;
    --r-btn:12px;
    --shadow-card:0 18px 48px -24px rgba(0,0,0,.75);
    --shadow-float:0 30px 80px -30px rgba(0,0,0,.85);
    --ease:cubic-bezier(.2,.7,.3,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg-base);
    color:var(--text-1);
    font-family:'HarmonyOS Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
    font-size:16px;
    line-height:1.9;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease)}
  button,input{font:inherit;color:inherit}
  button{background:none;border:0;cursor:pointer}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

  .container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
  @media (min-width:1024px){.container{padding:0 32px}}

  .mono{font-family:ui-monospace,'SFMono-Regular',Consolas,monospace;font-variant-numeric:tabular-nums}
  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:transparent;
    border-bottom:1px solid transparent;
    transition:background-color .24s var(--ease),border-color .24s var(--ease),backdrop-filter .24s var(--ease);
  }
  .site-header.is-scrolled{
    background:rgba(6,16,23,.86);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom-color:var(--line);
  }
  .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
  .brand{display:flex;align-items:center;gap:10px}
  .brand-mark{
    width:36px;height:36px;border-radius:10px;flex:0 0 auto;
    display:grid;place-items:center;
    background:linear-gradient(140deg,var(--accent),#1b9c8b);
    color:var(--accent-ink);font-weight:800;font-size:18px;letter-spacing:0;
    box-shadow:0 10px 26px -12px rgba(47,227,196,.75);
  }
  .brand-text strong{display:block;font-size:16px;line-height:1.25;color:var(--text-1);letter-spacing:.01em}
  .brand-text small{display:block;font-size:11px;line-height:1.4;color:var(--text-3);letter-spacing:.06em}

  .nav-main{display:flex;align-items:center;gap:28px}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;gap:6px;
    font-size:15px;line-height:1.4;color:var(--text-2);padding:8px 0;
  }
  .nav-link:hover{color:var(--text-1)}
  .nav-link.is-active{color:var(--text-1)}
  .nav-link.is-active::after{
    content:"";position:absolute;left:0;right:0;bottom:-16px;height:2px;
    background:var(--accent);border-radius:2px;box-shadow:0 0 12px rgba(47,227,196,.8);
  }
  .nav-more{position:relative}
  .nav-more-btn{font:inherit;font-size:15px;color:var(--text-2);padding:8px 0}
  .nav-more-btn:hover{color:var(--text-1)}
  .caret{width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform .2s var(--ease)}
  .nav-more:hover .caret,.nav-more:focus-within .caret{transform:rotate(225deg) translateY(-2px)}

  .mega{
    position:absolute;right:0;top:calc(100% + 20px);width:760px;
    display:grid;grid-template-columns:1.45fr 1fr;gap:28px;
    padding:24px;border-radius:18px;
    background:var(--glass);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border:1px solid var(--glass-border);
    box-shadow:var(--shadow-float);
    opacity:0;visibility:hidden;transform:translateY(6px);
    transition:opacity .16s var(--ease),transform .16s var(--ease),visibility .16s;
  }
  .mega::before{
    content:"";position:absolute;left:24px;right:24px;top:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(47,227,196,.85),transparent);
  }
  .nav-more:hover .mega,.nav-more:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0)}
  .mega-title{font-size:12px;letter-spacing:.14em;color:var(--text-3);margin-bottom:12px;text-transform:uppercase}
  .mega-list li + li{margin-top:2px}
  .mega-list a{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:10px;font-size:14px;color:var(--text-2)}
  .mega-list a:hover{background:rgba(47,227,196,.08);color:var(--text-1)}
  .mega-list .mono{font-size:12px;color:var(--accent);min-width:20px}
  .mega-list .hint{margin-left:auto;font-size:12px;color:var(--text-3)}
  .mega-news li{padding:9px 0;border-bottom:1px solid var(--line)}
  .mega-news li:last-child{border-bottom:0}
  .mega-news a{display:block;font-size:14px;color:var(--text-1);line-height:1.6}
  .mega-news a:hover{color:var(--accent)}
  .mega-news time{display:block;font-size:12px;color:var(--accent-2);margin-top:4px;font-variant-numeric:tabular-nums}
  .mega-card{
    margin-top:16px;padding:14px;border-radius:14px;
    background:var(--surface-2);border:1px solid var(--line);
  }
  .mega-card img{width:100%;height:88px;object-fit:cover;border-radius:10px;background:var(--surface-2)}
  .mega-card p{font-size:13px;color:var(--text-2);margin-top:10px;line-height:1.7}
  .mega-card a.mini{
    display:inline-block;margin-top:10px;font-size:13px;color:var(--accent-ink);
    background:var(--accent);padding:6px 12px;border-radius:9px;font-weight:600;
    box-shadow:0 10px 30px -12px rgba(47,227,196,.7);
  }

  /* 移动端抽屉 */
  .mobile-drawer{display:none;position:relative}
  .burger{
    width:40px;height:40px;border-radius:10px;border:1px solid var(--glass-border);
    display:grid;place-content:center;gap:4px;background:rgba(16,42,56,.5);cursor:pointer;list-style:none;
  }
  .burger::-webkit-details-marker{display:none}
  .burger span{display:block;width:18px;height:2px;background:var(--text-1);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
  .mobile-drawer[open] .burger span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .mobile-drawer[open] .burger span:nth-child(2){opacity:0}
  .mobile-drawer[open] .burger span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .drawer-panel{
    position:fixed;inset:0;z-index:80;background:rgba(3,10,15,.97);
    padding:80px 24px 40px;overflow-y:auto;
  }
  .drawer-close{
    position:absolute;top:16px;right:20px;width:40px;height:40px;border-radius:10px;
    border:1px solid var(--glass-border);display:grid;place-items:center;font-size:20px;color:var(--text-1);
  }
  .drawer-panel .brand{margin-bottom:28px}
  .drawer-panel nav a.drawer-link{
    display:block;font-size:20px;font-weight:600;color:var(--text-1);
    padding:14px 0;border-bottom:1px solid var(--line);
  }
  .drawer-panel nav a.drawer-link:hover{color:var(--accent)}
  .drawer-panel details.d-group{margin-top:22px;border-top:1px solid var(--line);padding-top:18px}
  .drawer-panel details.d-group summary{
    font-size:14px;color:var(--text-2);cursor:pointer;list-style:none;padding:8px 0;
  }
  .drawer-panel details.d-group summary::-webkit-details-marker{display:none}
  .drawer-panel details.d-group a{display:block;font-size:15px;color:var(--text-2);padding:9px 0}
  .drawer-panel details.d-group a:hover{color:var(--accent)}
  .drawer-cta{margin-top:32px}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-size:15px;font-weight:600;line-height:1;
    padding:14px 26px;border-radius:var(--r-btn);
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),filter .22s var(--ease);
  }
  .btn-primary{background:var(--accent);color:var(--accent-ink)}
  .btn-primary:hover{filter:brightness(1.06);box-shadow:0 14px 40px -10px rgba(47,227,196,.6);transform:translateY(-2px)}
  .btn-primary:active{transform:translateY(0);box-shadow:none}
  .btn-ghost{background:transparent;color:var(--text-1);border:1px solid var(--glass-border)}
  .btn-ghost:hover{border-color:var(--accent);background:rgba(47,227,196,.08);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(0)}
  .btn-text{display:inline-flex;align-items:center;gap:6px;font-size:15px;color:var(--accent);border-bottom:2px solid transparent;border-radius:0;padding:2px 0}
  .btn-text:hover{border-bottom-color:var(--accent)}
  .btn-icon{
    width:40px;height:40px;border-radius:10px;border:1px solid var(--glass-border);
    background:rgba(16,42,56,.5);display:inline-grid;place-items:center;color:var(--text-1);
  }
  .btn-icon:hover{border-color:var(--accent);color:var(--accent)}

  /* ============ 分类页窄版 Hero ============ */
  .cat-hero{position:relative;overflow:hidden;background:var(--bg-deep)}
  .cat-hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;opacity:.55}
  .cat-hero-veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(3,10,15,.72),rgba(6,16,23,.94))}
  .cat-hero-grid{
    position:absolute;inset:0;opacity:.35;
    background-image:linear-gradient(rgba(120,224,235,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,224,235,.06) 1px,transparent 1px);
    background-size:64px 64px;
  }
  .cat-hero-inner{position:relative;padding:64px 0 56px;min-height:300px;display:flex;flex-direction:column;justify-content:center}
  .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2)}
  .crumb a:hover{color:var(--accent)}
  .crumb .sep{color:var(--text-3)}
  .cat-hero h1{
    margin-top:18px;
    font-size:32px;line-height:1.15;font-weight:700;letter-spacing:.015em;color:#fff;
    max-width:900px;
  }
  .cat-hero h1 .accent-word{color:var(--accent)}
  .cat-hero-lead{margin-top:14px;font-size:16px;color:var(--text-2);max-width:720px}
  .cat-hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
  .pill{
    display:inline-flex;align-items:center;gap:6px;font-size:12px;line-height:1;
    padding:8px 12px;border-radius:999px;border:1px solid var(--glass-border);
    color:var(--text-2);background:rgba(16,42,56,.4);
  }
  .pill.is-hot{border-color:rgba(255,180,84,.42);color:var(--accent-2)}

  /* ============ 锚点条 ============ */
  .anchor-bar{
    position:sticky;top:60px;z-index:45;
    background:rgba(6,16,23,.9);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  }
  .anchor-track{display:flex;gap:8px;overflow-x:auto;padding:12px 0;scrollbar-width:none}
  .anchor-track::-webkit-scrollbar{display:none}
  .anchor-track a{
    flex:0 0 auto;font-size:14px;color:var(--text-2);padding:8px 14px;border-radius:10px;border:1px solid transparent;white-space:nowrap;
  }
  .anchor-track a:hover{color:var(--text-1);background:rgba(47,227,196,.07);border-color:var(--glass-border)}
  .anchor-track a.is-current{color:var(--accent-ink);background:var(--accent);font-weight:600}

  /* ============ 板块基础 ============ */
  .section{padding:56px 0}
  @media (min-width:1024px){.section{padding:96px 0}}
  .sec-head h2{font-size:24px;font-weight:650;line-height:1.3;color:var(--text-1);letter-spacing:.01em}
  @media (min-width:1024px){.sec-head h2{font-size:32px}}
  .sec-head p{margin-top:12px;font-size:16px;color:var(--text-2);max-width:760px}
  .divider{height:1px;background:var(--line);border:0;margin:0}

  /* 数据条 */
  .stat-band{
    display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;
    background:var(--line);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  }
  @media (min-width:768px){.stat-band{grid-template-columns:repeat(4,minmax(0,1fr))}}
  .stat-cell{background:var(--surface);padding:24px 22px}
  .stat-cell .num{font-size:30px;line-height:1;color:var(--accent);font-weight:700}
  .stat-cell .lbl{margin-top:10px;font-size:14px;color:var(--text-2)}
  .stat-cell .sub{margin-top:4px;font-size:12px;color:var(--text-3)}

  /* 双列图文卡 */
  .path-grid{display:grid;grid-template-columns:1fr;gap:24px}
  @media (min-width:768px){.path-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}}
  .path-card{
    position:relative;display:flex;flex-direction:column;
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    overflow:hidden;box-shadow:var(--shadow-card);
    transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
  }
  .path-card::before{
    content:"";position:absolute;left:0;right:0;top:0;height:1px;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);
  }
  .path-card:hover{transform:translateY(-2px);border-color:rgba(47,227,196,.45)}
  .path-media{position:relative;aspect-ratio:3/2;overflow:hidden;background:var(--surface-2)}
  .path-media img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
  .path-card:hover .path-media img{transform:scale(1.04)}
  .path-media .badge{
    position:absolute;left:14px;top:14px;font-size:12px;line-height:1;
    padding:7px 11px;border-radius:999px;color:var(--accent-2);
    border:1px solid rgba(255,180,84,.45);background:rgba(3,10,15,.64);
    backdrop-filter:blur(6px);
  }
  .path-body{padding:22px;display:flex;flex-direction:column;flex:1}
  .path-body h3{font-size:19px;font-weight:650;line-height:1.45;color:var(--text-1)}
  .path-card:hover .path-body h3{color:var(--accent)}
  .path-body p{margin-top:10px;font-size:14px;line-height:1.85;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .path-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:18px}
  .tag{
    font-size:12px;line-height:1;padding:7px 10px;border-radius:999px;
    border:1px solid var(--glass-border);color:var(--text-2);background:rgba(16,42,56,.5);
  }
  .path-foot{margin-top:16px;padding-top:14px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3)}
  .path-foot .arrow{color:var(--accent);transition:transform .22s var(--ease)}
  .path-card:hover .path-foot .arrow{transform:translateX(4px)}

  /* 步骤流程 */
  .steps{display:grid;grid-template-columns:1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
  @media (min-width:768px){.steps{grid-template-columns:repeat(4,minmax(0,1fr))}}
  .step{background:var(--surface);padding:26px 22px}
  .step .idx{
    font-size:30px;line-height:1;font-weight:700;color:transparent;
    -webkit-text-stroke:1px rgba(47,227,196,.55);
    transition:color .22s var(--ease);
  }
  .step:hover .idx{color:var(--accent);-webkit-text-stroke:1px transparent}
  .step h3{margin-top:14px;font-size:17px;font-weight:650;color:var(--text-1)}
  .step p{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.8}

  /* FAQ */
  .faq-wrap{max-width:800px;margin:0 auto}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item:first-child{border-top:1px solid var(--line)}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 4px;font-size:17px;font-weight:600;color:var(--text-1);
    transition:color .22s var(--ease);
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::after{
    content:"+";font-size:22px;line-height:1;color:var(--text-3);flex:0 0 auto;transition:color .22s var(--ease),transform .22s var(--ease);
  }
  .faq-item[open] summary{color:var(--accent)}
  .faq-item[open] summary::after{content:"−";color:var(--accent)}
  .faq-item .ans{padding:0 4px 22px;font-size:16px;line-height:1.9;color:var(--text-2)}
  .faq-item[open]{background:var(--surface);border-radius:14px;padding:0 18px}

  /* 交叉推荐 */
  .cross-grid{display:grid;grid-template-columns:1fr;gap:20px}
  @media (min-width:768px){.cross-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .cross-card{
    display:flex;gap:14px;align-items:center;padding:18px;border-radius:var(--r-card);
    background:var(--surface);border:1px solid var(--line);
    transition:transform .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease);
  }
  .cross-card:hover{transform:translateY(-2px);border-color:rgba(47,227,196,.45);background:var(--surface-2)}
  .cross-card img{width:72px;height:72px;object-fit:cover;border-radius:var(--r-img);background:var(--surface-2);flex:0 0 auto}
  .cross-card h3{font-size:16px;font-weight:650;color:var(--text-1)}
  .cross-card:hover h3{color:var(--accent)}
  .cross-card p{margin-top:6px;font-size:13px;color:var(--text-2);line-height:1.7}

  /* CTA 玻璃条 */
  .cta-band{
    position:relative;overflow:hidden;
    border-radius:var(--r-card);
    background:var(--glass);
    border:1px solid var(--glass-border);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    box-shadow:var(--shadow-float);
    padding:28px 24px;
    display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  }
  .cta-band::before{
    content:"";position:absolute;left:0;right:0;top:0;height:2px;
    background:linear-gradient(90deg,transparent,var(--accent),transparent);
  }
  .cta-band .cta-text{font-size:17px;font-weight:600;color:var(--text-1)}
  .cta-band .cta-sub{margin-top:6px;font-size:14px;color:var(--text-2)}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}
  .cta-state{font-size:13px;color:var(--accent-2);margin-top:8px;min-height:18px}

  /* 表单 */
  .form-wrap{max-width:720px;margin:0 auto}
  .form-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    padding:28px 24px;box-shadow:var(--shadow-card);
  }
  .field{margin-bottom:18px}
  .field label{display:block;font-size:13px;color:var(--text-2);margin-bottom:8px}
  .field input,.field select,.field textarea{
    width:100%;background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-btn);
    padding:13px 14px;font-size:15px;color:var(--text-1);transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
  }
  .field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,227,196,.16);
  }
  .field .tip{font-size:12px;color:var(--text-3);margin-top:6px}
  .field.is-error input{border-color:var(--accent-2)}
  .field .err{display:none;font-size:12px;color:var(--accent-2);margin-top:6px}
  .field.is-error .err{display:block}

  /* ============ 页脚 ============ */
  .site-footer{border-top:1px solid var(--line);background:var(--bg-deep);padding:56px 0 28px;margin-top:8px}
  .footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
  @media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr 1.2fr;gap:28px}}
  .footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:var(--text-2);max-width:340px}
  .footer-col h4{font-size:14px;font-weight:600;color:var(--text-2);margin-bottom:16px}
  .footer-col li{margin-bottom:11px}
  .footer-col a{font-size:15px;color:var(--text-1)}
  .footer-col a:hover{color:var(--accent)}
  .footer-col span{font-size:14px;color:var(--text-2)}
  .footer-bottom{
    margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
    display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--text-3);
  }

  @media (max-width:1023px){
    .nav-main{display:none}
    .mobile-drawer{display:block}
    .site-header{background:rgba(6,16,23,.86);backdrop-filter:blur(14px);border-bottom-color:var(--line)}
    .anchor-bar{top:60px}
    .nav-wrap{height:60px}
    .cat-hero-inner{padding:44px 0 40px;min-height:260px}
  }
  @media (min-width:1024px){
    .mobile-drawer{display:none}
    .nav-wrap{height:72px}
  }

  @media (prefers-reduced-motion:reduce){
    *{transition:none!important;animation:none!important}
    html{scroll-behavior:auto}
    .path-card:hover,.cross-card:hover,.btn:hover{transform:none}
    .path-card:hover .path-media img{transform:none}
  }

/* roulang page: category4 */
:root{
  --bg-base:#061017;
  --bg-deep:#030A0F;
  --surface:#0B1B26;
  --surface-2:#102A38;
  --glass:rgba(18,42,56,.55);
  --glass-border:rgba(120,224,235,.14);
  --accent:#2FE3C4;
  --accent-ink:#04151A;
  --accent-2:#FFB454;
  --text-1:#E8F3F7;
  --text-2:#9DB4C0;
  --text-3:#6B8391;
  --line:rgba(255,255,255,.08);
  --radius-card:18px;
  --radius-img:14px;
  --radius-btn:12px;
  --shadow-card:0 18px 48px -24px rgba(0,0,0,.75);
  --shadow-float:0 30px 80px -30px rgba(0,0,0,.85);
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:150px;-webkit-text-size-adjust:100%}
body.site-body{
  margin:0;padding:0;
  background:var(--bg-base);
  color:var(--text-1);
  font-family:'HarmonyOS Sans SC','Source Han Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  font-size:16px;line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
.site-body a{color:inherit;text-decoration:none;transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease)}
.site-body img{display:block;max-width:100%;height:auto}
.site-body button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
.site-body ul,.site-body ol{margin:0;padding:0;list-style:none}
.site-body p{margin:0}
.mono{font-family:ui-monospace,'SFMono-Regular',Consolas,monospace;font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media(min-width:1024px){.container{padding:0 32px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:transparent;
  transition:background-color .24s var(--ease),backdrop-filter .24s var(--ease),border-color .24s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(6,16,23,.86);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom-color:var(--line);
}
.nav-wrap{display:flex;align-items:center;gap:24px;height:60px}
@media(min-width:1024px){.nav-wrap{height:72px;gap:28px}}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand-mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(150deg,#2FE3C4,#0F8E7E);
  color:var(--accent-ink);font-weight:800;font-size:19px;letter-spacing:.02em;
  box-shadow:0 10px 26px -12px rgba(47,227,196,.7);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;font-weight:700;color:var(--text-1);letter-spacing:.01em}
.brand-text small{font-size:11px;color:var(--text-3);letter-spacing:.02em;margin-top:2px}

.nav-main{display:none;align-items:center;gap:26px;margin-left:auto}
@media(min-width:1024px){.nav-main{display:flex}}
.nav-link{
  position:relative;font-size:15px;color:var(--text-2);padding:6px 0;white-space:nowrap;
  transition:color .22s var(--ease);
}
.nav-link:hover{color:var(--text-1)}
.nav-link.is-active{color:var(--accent)}
.nav-link.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--accent),rgba(47,227,196,.15));
}

.nav-more{position:relative}
.nav-more-btn{display:inline-flex;align-items:center;gap:6px}
.caret{
  width:6px;height:6px;border-right:1.6px solid currentColor;border-bottom:1.6px solid currentColor;
  transform:rotate(45deg) translateY(-2px);transition:transform .22s var(--ease);
}
.nav-more:hover .caret,.nav-more:focus-within .caret{transform:rotate(225deg) translateY(-1px)}
.mega{
  position:absolute;right:0;top:calc(100% + 14px);width:760px;
  display:grid;grid-template-columns:1.35fr 1fr;gap:28px;padding:26px;
  background:var(--glass);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border:1px solid var(--glass-border);border-radius:18px;box-shadow:var(--shadow-float);
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s;
  overflow:hidden;
}
.mega::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(47,227,196,.75),rgba(47,227,196,0));
}
.nav-more:hover .mega,.nav-more:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:12px;letter-spacing:.06em;color:var(--text-3);margin-bottom:12px}
.mega-list li a,.mega-news li a{
  display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:10px;
  font-size:14px;color:var(--text-2);transition:background-color .2s var(--ease),color .2s var(--ease);
}
.mega-list li a:hover,.mega-news li a:hover{background:rgba(47,227,196,.08);color:var(--text-1)}
.mega-list .mono{font-size:12px;color:var(--accent);opacity:.85}
.mega-list .hint{margin-left:auto;font-size:12px;color:var(--text-3)}
.mega-news li a{justify-content:space-between}
.mega-news time{font-size:12px;color:var(--accent-2)}
.mega-card{
  margin-top:16px;display:block;border:1px solid var(--glass-border);border-radius:14px;
  overflow:hidden;background:rgba(11,27,38,.7);transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.mega-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.mega-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.mega-card span{display:block;padding:12px 14px;font-size:13px;color:var(--text-2)}

.nav-toggle{
  display:grid;place-items:center;width:40px;height:40px;border-radius:10px;
  border:1px solid var(--glass-border);margin-left:auto;gap:4px;
}
.nav-toggle span{display:block;width:16px;height:1.6px;background:var(--text-1);border-radius:2px;transition:transform .2s var(--ease)}
@media(min-width:1024px){.nav-toggle{display:none}}

.nav-drawer{
  position:fixed;inset:0;z-index:120;background:rgba(3,10,15,.97);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  padding:80px 24px 32px;display:flex;flex-direction:column;gap:4px;
  transform:translateY(-8px);opacity:0;visibility:hidden;transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  overflow-y:auto;
}
.nav-drawer.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-close{
  position:fixed;top:16px;right:20px;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--glass-border);color:var(--text-1);font-size:22px;line-height:1;
  display:grid;place-items:center;
}
.drawer-nav{display:flex;flex-direction:column}
.drawer-nav a{
  font-size:20px;font-weight:600;color:var(--text-1);padding:16px 4px;border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--accent)}
.drawer-cta{margin-top:28px;justify-content:center}

/* ============ 通用按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);padding:14px 26px;font-size:15px;font-weight:600;
  transition:filter .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
  cursor:pointer;white-space:nowrap;
}
.btn-primary{background:var(--accent);color:var(--accent-ink);box-shadow:0 10px 30px -16px rgba(47,227,196,.8)}
.btn-primary:hover{filter:brightness(1.06);box-shadow:0 14px 40px -10px rgba(47,227,196,.6)}
.btn-primary:active{box-shadow:none;transform:translateY(1px)}
.btn-ghost{background:transparent;border:1px solid var(--glass-border);color:var(--text-1)}
.btn-ghost:hover{border-color:var(--accent);background:rgba(47,227,196,.08);color:var(--accent)}
.btn-text{
  padding:6px 0;font-size:15px;font-weight:600;color:var(--accent);
  border-bottom:2px solid rgba(47,227,196,.45);border-radius:0;
}
.btn-text:hover{border-bottom-color:var(--accent);filter:brightness(1.08)}
.icon-btn{
  width:40px;height:40px;border-radius:10px;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--glass-border);color:var(--text-2);
  transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease);
}
.icon-btn:hover{color:var(--accent);border-color:var(--accent);background:rgba(47,227,196,.08)}

/* ============ 窄版 Hero ============ */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(3,10,15,.62) 0%,rgba(3,10,15,.9) 60%,rgba(6,16,23,.98) 100%),
             url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(120,224,235,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,224,235,.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.8),transparent 85%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.8),transparent 85%);
}
.hero-inner{position:relative;z-index:2;padding:72px 0 44px;max-width:820px}
@media(min-width:1024px){.hero-inner{padding:96px 0 56px}}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-2);margin-bottom:20px}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"›";color:var(--text-3)}
.crumb a:hover{color:var(--accent)}
.crumb .current{color:var(--text-1)}
.page-hero h1{
  font-size:clamp(30px,4.6vw,48px);font-weight:700;line-height:1.16;letter-spacing:.01em;
  color:var(--text-1);margin:0 0 16px;
}
.page-hero h1 em{font-style:normal;color:var(--accent)}
.hero-lead{font-size:17px;color:var(--text-2);max-width:720px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.chip{
  font-size:12px;padding:6px 14px;border-radius:999px;color:var(--accent-2);
  border:1px solid rgba(255,180,84,.32);background:rgba(255,180,84,.07);
}
.chip.is-accent{color:var(--accent);border-color:rgba(47,227,196,.32);background:rgba(47,227,196,.07)}

/* ============ 锚点条 ============ */
.anchor-bar{
  position:sticky;top:60px;z-index:60;
  background:rgba(6,16,23,.92);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
@media(min-width:1024px){.anchor-bar{top:72px}}
.anchor-scroll{display:flex;gap:8px;overflow-x:auto;padding:12px 20px;scrollbar-width:none}
.anchor-scroll::-webkit-scrollbar{display:none}
@media(min-width:1024px){.anchor-scroll{padding:12px 32px}}
.anchor-scroll a{
  white-space:nowrap;font-size:14px;color:var(--text-2);
  border:1px solid var(--line);border-radius:999px;padding:7px 16px;
  transition:color .22s var(--ease),border-color .22s var(--ease),background-color .22s var(--ease);
}
.anchor-scroll a:hover{color:var(--text-1);border-color:var(--glass-border);background:rgba(255,255,255,.03)}
.anchor-scroll a.is-active{color:var(--accent);border-color:rgba(47,227,196,.45);background:rgba(47,227,196,.08)}

/* ============ 主体 ============ */
.qa-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:32px;padding:56px 0 24px}
@media(min-width:1024px){
  .qa-layout{grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;padding:88px 0 32px}
}
.qa-aside{grid-column:span 1;min-width:0}
.qa-main{grid-column:span 1;min-width:0}
@media(min-width:1024px){
  .qa-aside{grid-column:span 4}
  .qa-main{grid-column:span 8}
}
.toc-box{
  position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px;box-shadow:var(--shadow-card);overflow:hidden;
}
.toc-box::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(47,227,196,.55),rgba(47,227,196,0));
}
@media(min-width:1024px){.toc-box{position:sticky;top:150px}}
.toc-title{font-size:13px;color:var(--text-3);letter-spacing:.04em;margin-bottom:16px}
.toc-list li+li{border-top:1px solid var(--line)}
.toc-list a{display:flex;gap:12px;align-items:flex-start;padding:14px 0;color:var(--text-2);font-size:15px}
.toc-list a:hover{color:var(--accent)}
.toc-list .num{
  font-family:ui-monospace,'SFMono-Regular',Consolas,monospace;font-size:13px;color:var(--accent);
  opacity:.9;padding-top:3px;min-width:22px;
}
.toc-list .t-name{font-weight:600;color:var(--text-1);display:block;line-height:1.5;font-size:15px}
.toc-list a:hover .t-name{color:var(--accent)}
.toc-list .t-desc{display:block;font-size:13px;color:var(--text-3);margin-top:2px}
.toc-hint{
  margin-top:20px;padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);line-height:1.8;
}

.qa-group{margin-bottom:52px;scroll-margin-top:170px}
.qa-group:last-of-type{margin-bottom:12px}
.group-head{margin-bottom:22px}
.group-head h2{
  font-size:clamp(22px,2.6vw,30px);font-weight:650;line-height:1.3;color:var(--text-1);
  margin:0;display:flex;align-items:center;gap:12px;
}
.group-head h2::before{
  content:"";width:3px;height:22px;border-radius:2px;background:var(--accent);
  box-shadow:0 0 18px rgba(47,227,196,.5);
}
.group-head p{font-size:14px;color:var(--text-2);margin-top:10px}

.qa-item{
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;
  transition:background-color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.qa-item:hover{border-color:rgba(120,224,235,.28)}
.qa-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  padding:18px 20px;font-size:18px;font-weight:600;line-height:1.6;color:var(--text-1);
  transition:color .22s var(--ease);
}
.qa-item summary::-webkit-details-marker{display:none}
.qa-item summary::after{
  content:"+";font-family:ui-monospace,'SFMono-Regular',Consolas,monospace;
  font-size:20px;line-height:1;color:var(--accent);flex:0 0 auto;padding-top:5px;
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.qa-item[open]{background:var(--surface-2);border-color:rgba(47,227,196,.35);box-shadow:var(--shadow-card)}
.qa-item[open] summary{color:var(--accent)}
.qa-item[open] summary::after{content:"−"}
.qa-body{padding:0 20px 20px;font-size:16px;line-height:1.9;color:var(--text-2)}
.qa-body p+p{margin-top:14px}
.qa-body strong{color:var(--text-1);font-weight:600}
.qa-body ul{margin-top:14px}
.qa-body ul li{position:relative;padding-left:18px;margin-bottom:10px}
.qa-body ul li::before{
  content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:1px;background:var(--accent);
}
.qa-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.qa-meta .chip{font-size:12px}

/* ============ 检索表单 ============ */
.form-section{padding:24px 0 24px}
@media(min-width:1024px){.form-section{padding:32px 0 48px}}
.form-band{
  position:relative;max-width:720px;margin:0 auto;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-card);overflow:hidden;
}
.form-band::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(47,227,196,.55),rgba(47,227,196,0));
}
.form-band h2{font-size:20px;font-weight:650;margin:0 0 8px;color:var(--text-1)}
.form-band .form-note{font-size:14px;color:var(--text-2);margin-bottom:20px}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:13px;color:var(--text-2)}
.field input{
  width:100%;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;
  padding:13px 16px;font-size:15px;color:var(--text-1);font-family:inherit;
  transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.field input::placeholder{color:var(--text-3)}
.field input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(47,227,196,.14)}
.form-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:18px;align-items:center}
.form-tip{font-size:13px;color:var(--text-3);margin-top:14px;min-height:20px}
.form-tip.is-error{color:var(--accent-2)}

/* ============ 交叉推荐 ============ */
.cross-section{padding:24px 0 8px}
@media(min-width:1024px){.cross-section{padding:40px 0 16px}}
.sec-head{margin-bottom:26px;max-width:760px}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:650;line-height:1.3;margin:0 0 10px;color:var(--text-1)}
.sec-head p{font-size:15px;color:var(--text-2)}
.cross-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:20px}
@media(min-width:768px){.cross-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.rec-card{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:transform .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.rec-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;z-index:2;
  background:linear-gradient(90deg,rgba(47,227,196,.5),rgba(47,227,196,0));
}
.rec-card:hover{transform:translateY(-2px);border-color:rgba(47,227,196,.45);box-shadow:var(--shadow-float)}
.rec-card .thumb{aspect-ratio:3/2;overflow:hidden;background:var(--surface-2)}
.rec-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease)}
.rec-card:hover .thumb img{transform:scale(1.04)}
.rec-body{padding:20px;display:flex;flex-direction:column;flex:1;gap:12px}
.rec-tag{font-size:12px;color:var(--accent-2);border:1px solid rgba(255,180,84,.32);border-radius:999px;padding:4px 12px;align-self:flex-start}
.rec-body h3{font-size:18px;font-weight:650;line-height:1.5;margin:0;color:var(--text-1);transition:color .22s var(--ease)}
.rec-card:hover .rec-body h3{color:var(--accent)}
.rec-body p{font-size:14px;color:var(--text-2);line-height:1.85;flex:1}
.rec-foot{display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);padding-top:14px;border-top:1px solid var(--line)}
.rec-foot .arrow{color:var(--accent);font-family:ui-monospace,monospace}

/* ============ CTA 条 ============ */
.cta-section{padding:40px 0 72px}
@media(min-width:1024px){.cta-section{padding:56px 0 96px}}
.cta-band{
  position:relative;overflow:hidden;
  display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;
  padding:26px 28px;border-radius:var(--radius-card);
  background:var(--glass);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid var(--glass-border);box-shadow:var(--shadow-float);
}
.cta-band::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--accent),rgba(47,227,196,0));
}
.cta-band p{font-size:17px;font-weight:600;color:var(--text-1)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:var(--bg-deep);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:36px}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr 1fr;gap:28px}}
.footer-brand p{font-size:14px;color:var(--text-2);line-height:1.9;margin-top:16px;max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text-2);margin:0 0 16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:15px;color:var(--text-1)}
.footer-col ul li a:hover{color:var(--accent)}
.footer-col ul li span{font-size:14px;color:var(--text-2);display:block;line-height:1.8}
.footer-bottom{
  margin-top:44px;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);
}

/* ============ 动效偏好 ============ */
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .rec-card:hover{transform:none}
  .rec-card:hover .thumb img{transform:none}
}