/* roulang page: index */
:root{
  --ink-900:#0E1418;
  --ink-800:#161E23;
  --ink-700:#1F2A31;
  --brand:#12D6B4;
  --brand-hi:#2FE6C6;
  --accent:#FFB020;
  --violet:#7C6CFF;
  --text:#E8EEF1;
  --muted:#93A3AC;
  --line:rgba(255,255,255,.08);
  --paper:#F6F4EF;
  --paper-text:#1B2226;
  --paper-line:#E2DDD3;
  --radius-s:10px;
  --radius-m:14px;
  --radius-l:20px;
  --shadow-1:0 10px 30px rgba(0,0,0,.35);
  --shadow-2:0 16px 40px rgba(0,0,0,.5);
  --font-cn:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --gap-s:20px;
  --gap-l:24px;
  --section-y:clamp(56px,8vw,104px);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font-num),var(--font-cn);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--brand-hi);}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:600;letter-spacing:.01em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
.section{padding-top:var(--section-y);padding-bottom:var(--section-y);}
.section--tight{padding-top:clamp(36px,5vw,64px);padding-bottom:clamp(36px,5vw,64px);}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  margin-bottom:clamp(28px,4vw,44px);
}
.section-title{position:relative;padding-left:16px;}
.section-title::before{
  content:"";
  position:absolute;
  left:0;top:6px;bottom:6px;
  width:4px;border-radius:2px;
  background:var(--brand);
}
.eyebrow{
  display:block;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--brand);
  margin-bottom:10px;
  font-weight:500;
}
.section-title h2{font-size:clamp(22px,3vw,30px);}
.section-title p{color:var(--muted);font-size:15px;margin-top:8px;max-width:62ch;}
.link-more{
  font-size:14px;
  color:var(--brand);
  border-bottom:1px solid rgba(18,214,180,.4);
  padding-bottom:2px;
  transition:color .18s ease,border-color .18s ease;
}
.link-more:hover{color:var(--brand-hi);border-color:var(--brand-hi);}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--radius-s);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .18s ease,background .18s ease,box-shadow .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#07201B;}
.btn-primary:hover{background:var(--brand-hi);color:#07201B;transform:translateY(-1px);}
.btn-outline{border-color:rgba(18,214,180,.6);color:var(--brand);background:transparent;}
.btn-outline:hover{background:rgba(18,214,180,.08);color:var(--brand-hi);border-color:var(--brand-hi);}
.btn-ghost{background:transparent;color:var(--text);border:none;padding:0 4px;height:auto;}
.btn-ghost span{border-bottom:1px solid rgba(232,238,241,.35);padding-bottom:2px;transition:border-color .18s ease,color .18s ease;}
.btn-ghost:hover{color:var(--brand-hi);}
.btn-ghost:hover span{border-color:var(--brand-hi);}
.btn-cta{background:linear-gradient(90deg,var(--brand),var(--accent));color:#0B1A17;}
.btn-cta:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(18,214,180,.25);color:#0B1A17;}
.btn-block{width:100%;}

/* 徽章 */
.badge{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  line-height:1;
  padding:6px 9px;
  border-radius:6px;
  background:rgba(18,214,180,.14);
  color:var(--brand);
  font-weight:500;
  letter-spacing:.02em;
}
.badge-accent{background:rgba(255,176,32,.14);color:var(--accent);}
.badge-violet{background:rgba(124,108,255,.14);color:var(--violet);}

/* 导航 */
.site-header{position:sticky;top:0;z-index:50;background:rgba(14,20,24,.86);transition:background .2s ease,box-shadow .2s ease;}
.site-header.is-stuck{background:rgba(14,20,24,.94);box-shadow:0 6px 20px rgba(0,0,0,.35);border-bottom:1px solid var(--line);}
.brand-bar{height:56px;display:flex;align-items:center;}
.brand-inner{display:flex;align-items:center;gap:18px;width:100%;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:9px;
  background:linear-gradient(140deg,rgba(18,214,180,.22),rgba(255,176,32,.12));
  border:1px solid rgba(18,214,180,.45);
  display:flex;align-items:center;justify-content:center;
}
.brand-mark svg{width:18px;height:18px;display:block;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:15px;font-weight:700;color:var(--text);letter-spacing:.01em;}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);}
.nav-search{margin-left:auto;display:flex;align-items:center;gap:8px;flex:0 1 320px;}
.nav-search input{
  width:100%;height:38px;border-radius:var(--radius-s);
  background:#12191E;border:1px solid rgba(255,255,255,.12);
  padding:0 12px;font-size:14px;color:var(--text);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search input::placeholder{color:var(--muted);}
.nav-search input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(18,214,180,.28);}
.nav-search button{
  height:38px;padding:0 16px;border-radius:var(--radius-s);
  background:rgba(18,214,180,.14);color:var(--brand);border:1px solid rgba(18,214,180,.35);
  font-size:14px;font-weight:600;cursor:pointer;transition:background .18s ease,color .18s ease;
}
.nav-search button:hover{background:rgba(18,214,180,.24);color:var(--brand-hi);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--radius-s);
  background:transparent;border:1px solid var(--line);cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;margin-left:auto;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s ease,opacity .2s ease;}
.site-header.nav-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.site-header.nav-open .nav-toggle span:nth-child(2){opacity:0;}
.site-header.nav-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.channel-bar{border-top:1px solid var(--line);}
.channel-inner{display:flex;align-items:center;gap:24px;height:44px;}
.channel-list{display:flex;align-items:center;gap:24px;overflow-x:auto;scrollbar-width:none;}
.channel-list::-webkit-scrollbar{display:none;}
.channel-list a{
  display:flex;align-items:center;height:44px;font-size:14px;color:var(--muted);
  position:relative;transition:color .18s ease;white-space:nowrap;
}
.channel-list a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.channel-list a:hover{color:var(--text);}
.channel-list a.is-active{color:var(--brand);}
.channel-list a.is-active::after{transform:scaleX(1);}
.hot-tags{display:flex;align-items:center;gap:10px;margin-left:auto;overflow-x:auto;scrollbar-width:none;}
.hot-tags::-webkit-scrollbar{display:none;}
.hot-tags .hot-label{font-size:12px;color:var(--muted);flex:0 0 auto;letter-spacing:.04em;}
.hot-tags a{
  flex:0 0 auto;font-size:12px;padding:5px 11px;border-radius:999px;
  background:rgba(255,255,255,.05);color:var(--muted);border:1px solid var(--line);
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.hot-tags a:hover{color:var(--brand);border-color:rgba(18,214,180,.4);background:rgba(18,214,180,.08);}

/* Hero */
.hero{position:relative;overflow:hidden;background:var(--ink-900);}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(18,214,180,.13) 1px,transparent 1px);
  background-size:22px 22px;opacity:.5;pointer-events:none;
}
.hero-grid{
  position:relative;
  display:grid;
  grid-template-columns:minmax(0,6fr) minmax(0,5fr);
  gap:clamp(28px,4vw,56px);
  align-items:center;
  padding-top:clamp(48px,7vw,88px);
  padding-bottom:clamp(40px,6vw,72px);
  min-height:min(70vh,620px);
}
.hero-copy{max-width:640px;}
.hero h1{
  font-size:clamp(30px,5vw,48px);
  font-weight:700;
  letter-spacing:.005em;
  margin:14px 0 0;
}
.hero-sub{
  margin-top:18px;font-size:18px;color:#B7C4CB;max-width:52ch;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:26px;}
.hero-points li{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:8px;}
.hero-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);flex:0 0 6px;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--radius-l);
  border:1px solid var(--line);box-shadow:var(--shadow-1);
}
.hero-visual::after{
  content:"";position:absolute;inset:0;border-radius:var(--radius-l);
  background:linear-gradient(135deg,rgba(14,20,24,.7),rgba(14,20,24,.2));
  pointer-events:none;
}
.status-card{
  position:absolute;left:-14px;bottom:22px;
  background:rgba(14,20,24,.92);
  border:1px solid rgba(18,214,180,.45);
  border-radius:var(--radius-m);
  padding:14px 18px;display:flex;align-items:center;gap:12px;
  box-shadow:var(--shadow-1);z-index:2;
}
.status-dot{position:relative;width:10px;height:10px;border-radius:50%;background:var(--brand);flex:0 0 10px;}
.status-dot::after{
  content:"";position:absolute;inset:-6px;border-radius:50%;
  border:1px solid rgba(18,214,180,.6);animation:pulse 2s ease-out infinite;
}
@keyframes pulse{0%{transform:scale(.7);opacity:.9;}100%{transform:scale(1.5);opacity:0;}}
.status-card strong{display:block;font-size:14px;font-weight:600;}
.status-card small{display:block;font-size:12px;color:var(--muted);}

/* 数据条 */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--ink-800);}
.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap-l);padding:28px 0;}
.stat-item{text-align:left;}
.stat-num{font-family:var(--font-num);font-size:clamp(22px,2.6vw,28px);color:var(--brand);font-weight:700;font-variant-numeric:tabular-nums;line-height:1.2;}
.stat-item span{display:block;font-size:13px;color:var(--muted);margin-top:6px;}

/* 流程 stepper */
.steps{padding-top:clamp(28px,3vw,40px);}
.step-track{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--gap-l);position:relative;}
.step{position:relative;padding-right:14px;}
.step::after{
  content:"";position:absolute;top:17px;left:46px;right:-24px;height:0;
  border-top:1px dashed rgba(18,214,180,.35);
}
.step:last-child::after{display:none;}
.step-num{
  width:34px;height:34px;border-radius:50%;border:1px solid rgba(18,214,180,.6);
  color:var(--brand);display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:700;background:var(--ink-900);position:relative;z-index:1;
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:18px;margin-top:18px;}
.step p{font-size:15px;color:var(--muted);margin-top:8px;line-height:1.75;}

/* Bento */
.bento{
  background:var(--ink-800);border:1px solid var(--line);border-radius:var(--radius-l);
  padding:clamp(24px,4vw,48px);
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(20px,3vw,32px);
}
.bento-main{display:flex;flex-direction:column;}
.bento-main .thumb{border-radius:var(--radius-m);overflow:hidden;border:1px solid var(--line);}
.bento-main .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease;}
.bento-main:hover .thumb img{transform:scale(1.04);}
.bento-main h3{font-size:20px;margin-top:18px;}
.bento-main p{color:var(--muted);font-size:15px;margin-top:10px;}
.bento-side{display:grid;grid-template-rows:1fr 1fr;gap:clamp(16px,2.4vw,24px);}
.bento-card{
  border:1px solid var(--line);border-radius:var(--radius-m);padding:22px 24px;
  background:var(--ink-700);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.bento-card:hover{transform:translateY(-4px);border-color:rgba(18,214,180,.35);box-shadow:var(--shadow-2);}
.bento-icon{
  width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:rgba(18,214,180,.14);color:var(--brand);font-size:16px;font-weight:700;
}
.bento-card h3{font-size:18px;margin-top:16px;}
.bento-card p{font-size:15px;color:var(--muted);margin-top:8px;}

/* 进度板块 */
.progress-block{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:clamp(24px,4vw,56px);align-items:start;}
.progress-list{display:flex;flex-direction:column;gap:26px;}
.progress-row{display:grid;grid-template-columns:1fr auto;gap:10px 16px;align-items:center;}
.progress-row .p-name{font-size:15px;color:var(--text);}
.progress-row .p-val{font-size:14px;color:var(--accent);font-variant-numeric:tabular-nums;font-weight:600;}
.progress-track{grid-column:1 / -1;height:8px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;}
.progress-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--accent));}
.divider-line{height:1px;background:var(--line);margin-top:clamp(40px,5vw,56px);}

/* 反馈 */
.voices{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap-l);}
.voice-card{
  border:1px solid var(--line);border-radius:var(--radius-m);background:var(--ink-800);
  padding:24px;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.voice-card:hover{transform:translateY(-4px);border-color:rgba(18,214,180,.35);box-shadow:var(--shadow-2);}
.voice-card p{font-size:15px;color:#C3CED4;line-height:1.8;}
.voice-meta{display:flex;align-items:center;gap:12px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line);}
.voice-avatar{
  width:34px;height:34px;border-radius:50%;background:rgba(255,176,32,.16);color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;flex:0 0 34px;
}
.voice-meta strong{font-size:14px;font-weight:600;}
.voice-meta small{display:block;font-size:12px;color:var(--muted);}

/* 资讯列表 */
.news-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap-l);}
.news-card{
  border:1px solid var(--line);border-radius:var(--radius-m);background:var(--ink-700);
  overflow:hidden;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
  box-shadow:var(--shadow-1);display:flex;
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(18,214,180,.3);box-shadow:var(--shadow-2);}
.news-link{display:flex;flex-direction:column;width:100%;}
.news-thumb{overflow:hidden;border-bottom:1px solid var(--line);}
.news-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s ease;}
.news-card:hover .news-thumb img{transform:scale(1.04);}
.news-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1;}
.meta-row{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;}
.news-time{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;}
.news-title{
  font-size:18px;font-weight:600;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-summary{
  font-size:14px;color:var(--muted);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-footer{text-align:center;margin-top:34px;}
.empty-state{
  border:1px dashed rgba(18,214,180,.35);border-radius:var(--radius-m);
  background:var(--ink-800);padding:44px 24px;text-align:center;
}
.empty-graphic{
  width:72px;height:72px;margin:0 auto 18px;border-radius:16px;
  border:1px solid rgba(18,214,180,.4);position:relative;
  background:linear-gradient(140deg,rgba(18,214,180,.16),rgba(255,176,32,.08));
}
.empty-graphic::after{
  content:"";position:absolute;left:50%;top:50%;width:18px;height:18px;
  transform:translate(-50%,-50%) rotate(45deg);
  border-top:2px solid var(--brand);border-right:2px solid var(--brand);
}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:20px;}

/* FAQ */
.faq-list{border:none;background:transparent;}
.faq-list .accordion-item{
  border:1px solid var(--line);border-radius:12px;background:var(--ink-800);
  margin-bottom:14px;overflow:hidden;position:relative;transition:border-color .18s ease;
}
.faq-list .accordion-item.is-active{border-color:rgba(18,214,180,.4);}
.faq-list .accordion-item.is-active::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--brand);
}
.faq-list .accordion-title{
  display:flex !important;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--text);
  background:transparent;border:none;line-height:1.5;
}
.faq-list .accordion-title::before{display:none !important;}
.faq-list .accordion-title::after{
  content:"";flex:0 0 auto;width:0;height:0;
  border-left:5px solid transparent;border-right:5px solid transparent;border-top:6px solid var(--brand);
  transition:transform .2s ease;
}
.faq-list .accordion-item.is-active .accordion-title{color:var(--brand);}
.faq-list .accordion-item.is-active .accordion-title::after{transform:rotate(180deg);}
.faq-list .accordion-content{
  background:transparent;border:none;padding:0 22px;
  color:#B7C4CB;font-size:15px;line-height:1.8;
}
.faq-list .accordion-content p{padding-bottom:18px;}

/* CTA */
.cta-band{
  border:1px solid rgba(18,214,180,.28);
  background:linear-gradient(120deg,rgba(18,214,180,.1),rgba(22,30,35,.9) 55%);
  border-radius:var(--radius-l);
  padding:clamp(28px,4vw,48px);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(22px,3vw,28px);}
.cta-band p{color:var(--muted);font-size:15px;margin-top:10px;max-width:56ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* 页脚 */
.site-footer{background:#0A0F12;border-top:1px solid var(--line);margin-top:clamp(56px,8vw,96px);}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,4fr) repeat(3,minmax(0,2.4fr));
  gap:clamp(24px,4vw,48px);
  padding:clamp(40px,5vw,64px) 0 32px;
}
.footer-brand strong{display:block;font-size:16px;font-weight:700;}
.footer-brand p{font-size:14px;color:var(--muted);margin-top:12px;max-width:34ch;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a,.footer-col span{font-size:13px;color:var(--muted);transition:color .18s ease;}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 28px;
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom .dot-sep{margin:0 8px;opacity:.5;}

/* 响应式 */
@media (max-width:1023px){
  .nav-search{display:none;}
  .nav-toggle{display:flex;}
  .channel-bar{
    display:none;
    position:absolute;left:0;right:0;top:100%;
    background:var(--ink-800);border-top:1px solid var(--line);
    box-shadow:0 16px 40px rgba(0,0,0,.5);
    max-height:70vh;overflow-y:auto;
  }
  .site-header.nav-open .channel-bar{display:block;}
  .channel-inner{display:block;height:auto;padding:8px 0 16px;}
  .channel-list{flex-direction:column;align-items:stretch;gap:0;overflow:visible;}
  .channel-list a{height:48px;font-size:15px;color:var(--text);border-bottom:1px solid var(--line);padding-left:20px;padding-right:20px;}
  .channel-list a::after{display:none;}
  .channel-list a.is-active{color:var(--brand);}
  .hot-tags{margin:14px 20px 0;flex-wrap:wrap;overflow:visible;}
  .hero-grid{grid-template-columns:1fr;min-height:0;padding-top:clamp(36px,6vw,56px);}
  .hero-visual img{aspect-ratio:16/9;}
  .status-card{left:12px;bottom:12px;}
  .steps .step-track{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
  .step::after{display:none;}
  .bento{grid-template-columns:1fr;}
  .progress-block{grid-template-columns:1fr;}
  .voices{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:767px){
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .steps .step-track{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .voices{grid-template-columns:1fr;}
  .bento-side{grid-template-rows:none;}
}
@media (max-width:519px){
  .container{padding-left:20px;padding-right:20px;}
  .brand-text em{display:none;}
  .brand-text strong{font-size:14px;}
  .hero-sub{font-size:16px;}
  .btn{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .btn-ghost{width:auto;text-align:left;}
  .cta-band{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;flex-direction:column;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .section-head{align-items:flex-start;}
}

/* roulang page: article */
:root{
  --ink-900:#0E1418;
  --ink-800:#161E23;
  --ink-700:#1F2A31;
  --brand:#12D6B4;
  --brand-hi:#2FE6C6;
  --accent:#FFB020;
  --violet:#7C6CFF;
  --text:#E8EEF1;
  --muted:#93A3AC;
  --line:rgba(255,255,255,.08);
  --paper:#F6F4EF;
  --paper-text:#1B2226;
  --paper-muted:#5C656B;
  --paper-line:#E2DDD3;
  --radius-s:10px;
  --radius:14px;
  --radius-lg:20px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --shadow-hi:0 16px 40px rgba(0,0,0,.5);
  --space-section:clamp(56px,8vw,104px);
  --font:"Inter",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease,border-color .18s ease,background-color .18s ease}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:600;letter-spacing:.01em}
p{margin:0 0 1.1em}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:1024px){
  .container{padding:0 32px}
}

/* ============ 顶部阅读进度 ============ */
.read-progress{
  position:fixed;
  top:0;left:0;
  height:3px;width:0;
  background:linear-gradient(90deg,var(--brand),var(--accent));
  z-index:80;
  opacity:0;
  transition:opacity .25s ease,width .1s linear;
}
.read-progress.is-on{opacity:1}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(14,20,24,.86);
  backdrop-filter:saturate(140%) blur(10px);
  transition:background-color .2s ease,box-shadow .2s ease,border-color .2s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-stuck{
  background:rgba(14,20,24,.92);
  border-bottom:1px solid var(--line);
  box-shadow:0 6px 20px rgba(0,0,0,.35);
}
.brand-bar{border-bottom:1px solid var(--line)}
.brand-inner{
  min-height:56px;
  display:flex;
  align-items:center;
  gap:16px;
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(18,214,180,.35);
  border-radius:10px;
  background:rgba(18,214,180,.08);
  flex:0 0 auto;
}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{font-size:16px;font-weight:600;color:var(--text);letter-spacing:.01em}
.brand-text em{font-size:12px;font-style:normal;color:var(--muted)}

.nav-search{
  display:flex;
  align-items:center;
  margin-left:auto;
  max-width:340px;
  width:100%;
  gap:8px;
}
.nav-search input[type="search"]{
  flex:1 1 auto;
  height:44px;
  min-width:0;
  padding:0 14px;
  color:var(--text);
  background:#12191E;
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-s);
  outline:none;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search input[type="search"]::placeholder{color:var(--muted)}
.nav-search input[type="search"]:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 2px rgba(18,214,180,.28);
}
.nav-search button{
  height:44px;
  padding:0 18px;
  border:1px solid rgba(18,214,180,.4);
  border-radius:var(--radius-s);
  background:rgba(18,214,180,.1);
  color:var(--brand);
  font-weight:500;
  transition:background-color .18s ease,transform .18s ease,color .18s ease;
}
.nav-search button:hover{background:rgba(18,214,180,.2);transform:translateY(-1px)}

.nav-toggle{
  margin-left:auto;
  width:44px;height:44px;
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--radius-s);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.channel-bar{background:rgba(22,30,35,.4);border-bottom:1px solid var(--line)}
.channel-inner{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding-top:8px;
  padding-bottom:8px;
}
.channel-list{display:flex;flex-wrap:wrap;gap:6px 22px;align-items:center}
.channel-list a{
  display:inline-block;
  padding:8px 0;
  font-size:14px;
  color:var(--muted);
  border-bottom:2px solid transparent;
  min-height:44px;
  line-height:28px;
}
.channel-list a:hover{color:var(--text)}
.channel-list a.is-active{color:var(--brand);border-bottom-color:var(--brand)}

.hot-tags{
  display:flex;
  align-items:center;
  gap:10px;
  overflow-x:auto;
  scrollbar-width:none;
  padding-bottom:4px;
}
.hot-tags::-webkit-scrollbar{display:none}
.hot-label{
  flex:0 0 auto;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--accent);
  background:rgba(255,176,32,.14);
  border-radius:6px;
  padding:3px 8px;
}
.hot-tags a{
  flex:0 0 auto;
  font-size:13px;
  color:var(--muted);
  border:1px solid var(--line);
  border-radius:999px;
  padding:5px 12px;
  white-space:nowrap;
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.hot-tags a:hover{color:var(--brand);border-color:rgba(18,214,180,.4);background:rgba(18,214,180,.08)}

@media (max-width:1023px){
  .brand-inner{flex-wrap:wrap;padding-top:8px;padding-bottom:8px}
  .nav-search{order:3;max-width:none;flex:1 1 100%}
  .nav-toggle{order:2}
  .channel-bar{display:none}
  .channel-bar.is-open{display:block}
  .channel-list{flex-direction:column;gap:0;width:100%}
  .channel-list li{width:100%}
  .channel-list a{
    display:flex;
    align-items:center;
    min-height:48px;
    border-bottom:1px solid var(--line);
    padding-left:4px;
  }
  .channel-list a.is-active{border-bottom-color:var(--line);color:var(--brand)}
}
@media (min-width:1024px){
  .nav-toggle{display:none}
  .channel-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:24px;padding-top:0;padding-bottom:0;min-height:44px}
  .channel-list{flex-wrap:nowrap}
  .hot-tags{padding-bottom:0}
}

/* ============ 通用按钮 / 徽章 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:var(--radius-s);
  font-size:15px;
  font-weight:500;
  border:1px solid transparent;
  transition:transform .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.btn-primary{background:var(--brand);color:#062420}
.btn-primary:hover{background:var(--brand-hi);transform:translateY(-1px);box-shadow:0 10px 24px rgba(18,214,180,.28)}
.btn-ghost{
  border-color:transparent;
  color:var(--text);
  height:auto;
  padding:2px 0;
  border-bottom:1px solid rgba(232,238,241,.35);
  border-radius:0;
}
.btn-ghost:hover{color:var(--brand);border-bottom-color:var(--brand)}
.btn-outline{border-color:rgba(18,214,180,.45);color:var(--brand);background:transparent}
.btn-outline:hover{background:rgba(18,214,180,.1);transform:translateY(-1px)}
.btn-grad{
  background:linear-gradient(90deg,var(--brand),var(--accent));
  color:#10201C;
}
.btn-grad:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(255,176,32,.25)}
@media (max-width:639px){
  .btn{height:42px;padding:0 16px;font-size:14px}
}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  line-height:1.6;
  padding:2px 9px;
  border-radius:6px;
  background:rgba(18,214,180,.14);
  color:var(--brand);
}
.badge-accent{background:rgba(255,176,32,.14);color:var(--accent)}
.badge-violet{background:rgba(124,108,255,.14);color:#B9B1FF}

/* ============ 文章头部 ============ */
.article-head{padding:26px 0 0}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:18px;
}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(147,163,172,.6)}
.breadcrumb .current{color:rgba(232,238,241,.75);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.article-title{
  font-size:clamp(26px,4vw,40px);
  line-height:1.28;
  margin-bottom:16px;
  max-width:24ch;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 16px;
  font-size:13px;
  color:var(--muted);
  padding-bottom:22px;
  border-bottom:1px solid var(--line);
}
.article-meta .item{display:inline-flex;align-items:center;gap:6px}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:rgba(147,163,172,.5)}

/* ============ 布局 ============ */
.article-shell{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:32px;
  padding:var(--space-section) 0;
}
@media (min-width:1024px){
  .article-shell{grid-template-columns:minmax(0,1fr) 280px;gap:40px;align-items:start}
}

/* ============ 纸感正文 ============ */
.paper{
  background:var(--paper);
  color:var(--paper-text);
  border-radius:16px;
  padding:clamp(24px,4vw,56px);
  box-shadow:var(--shadow);
  max-width:820px;
  margin:0 auto;
  width:100%;
}
.paper-top{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-bottom:20px;
  margin-bottom:26px;
  border-bottom:1px solid var(--paper-line);
  font-size:13px;
  color:var(--paper-muted);
}
.paper-top .tag{
  background:rgba(18,214,180,.16);
  color:#0B7A67;
  border-radius:6px;
  padding:2px 9px;
  font-size:12px;
}
.paper-top .tag-accent{background:rgba(255,176,32,.2);color:#8A5A00}

.article-body{font-size:17px;line-height:1.85;color:var(--paper-text);overflow-wrap:break-word}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  font-size:clamp(20px,2.4vw,25px);
  margin:1.6em 0 .7em;
  padding-left:14px;
  position:relative;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:.18em;
  width:4px;height:.92em;
  border-radius:2px;
  background:var(--brand);
}
.article-body h3{font-size:19px;margin:1.4em 0 .6em;font-weight:600}
.article-body h4{font-size:17px;margin:1.2em 0 .5em}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.3em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:.4em 0}
.article-body ul ::marker,.article-body ol ::marker{color:var(--brand)}
.article-body li::marker{color:#0B9E85}
.article-body a{color:#0B7A67;border-bottom:1px solid rgba(11,122,103,.35)}
.article-body a:hover{color:#06604F;border-bottom-color:#06604F}
.article-body strong{font-weight:600}
.article-body blockquote{
  margin:1.4em 0;
  padding:14px 18px;
  border-left:3px solid var(--brand);
  background:#EFEBE3;
  border-radius:0 10px 10px 0;
  color:#3A4247;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  width:100%;
  border-radius:12px;
  margin:1.4em 0;
  box-shadow:0 8px 24px rgba(27,34,38,.14);
}
.article-body figure{margin:1.4em 0}
.article-body figcaption{font-size:13px;color:var(--paper-muted);text-align:center;margin-top:8px}
.article-body code{
  background:#E9E4DA;
  border-radius:6px;
  padding:2px 6px;
  font-size:15px;
}
.article-body pre{
  background:#1B2226;
  color:#E8EEF1;
  padding:16px 18px;
  border-radius:12px;
  overflow-x:auto;
  font-size:14px;
}
.article-body pre code{background:transparent;color:inherit;padding:0}
.article-body table{
  display:block;
  width:100%;
  max-width:100%;
  overflow-x:auto;
  border-collapse:collapse;
  font-size:15px;
  margin:1.4em 0;
  border:1px solid var(--paper-line);
  border-radius:10px;
}
.article-body th,.article-body td{
  border:1px solid var(--paper-line);
  padding:10px 12px;
  text-align:left;
  white-space:nowrap;
}
.article-body th{background:#EDE8DE;font-weight:600}
.article-body hr{border:none;border-top:1px solid var(--paper-line);margin:2em 0}

.article-empty{padding:24px 0;text-align:center}
.article-empty h2{font-size:22px;margin-bottom:10px}
.article-empty p{color:var(--paper-muted);margin-bottom:20px}
.article-empty .btn-primary{color:#062420}

/* ============ 侧栏目录 ============ */
.article-aside{display:none}
@media (min-width:1024px){
  .article-aside{display:block;position:sticky;top:120px}
}
.toc-card{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow);
}
.toc-card h3{
  font-size:13px;
  letter-spacing:.08em;
  color:var(--brand);
  margin-bottom:14px;
  text-transform:none;
}
.toc-list li{margin:0}
.toc-list a{
  display:block;
  font-size:14px;
  color:var(--muted);
  padding:8px 10px;
  border-left:2px solid transparent;
  border-radius:0 8px 8px 0;
  line-height:1.6;
}
.toc-list a:hover{color:var(--text);background:rgba(255,255,255,.03)}
.toc-list a.is-current{color:var(--brand);border-left-color:var(--brand);background:rgba(18,214,180,.08)}
.toc-empty{font-size:13px;color:var(--muted);line-height:1.7}

.aside-cta{
  margin-top:20px;
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
}
.aside-cta strong{display:block;font-size:16px;margin-bottom:8px}
.aside-cta p{font-size:13px;color:var(--muted);margin-bottom:16px}
.aside-cta .btn{width:100%}

/* ============ 相关推荐 ============ */
.related{padding:0 0 var(--space-section)}
.section-head{margin-bottom:28px}
.eyebrow{
  display:block;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--brand);
  margin-bottom:8px;
}
.section-head h2{
  font-size:clamp(22px,3vw,30px);
  padding-left:14px;
  position:relative;
}
.section-head h2::before{
  content:"";
  position:absolute;left:0;top:.2em;
  width:4px;height:.86em;border-radius:2px;background:var(--brand);
}
.related-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:640px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.related-grid{grid-template-columns:repeat(3,1fr);gap:24px}}

.rec-card{
  display:flex;
  gap:16px;
  background:var(--ink-700);
  border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius);
  padding:20px;
  box-shadow:var(--shadow);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  height:100%;
}
.rec-card:hover{
  transform:translateY(-4px);
  border-color:rgba(18,214,180,.3);
  box-shadow:var(--shadow-hi);
}
.rec-thumb{
  flex:0 0 108px;
  overflow:hidden;
  border-radius:10px;
  aspect-ratio:4/3;
}
.rec-thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .3s ease;
}
.rec-card:hover .rec-thumb img{transform:scale(1.04)}
.rec-body{min-width:0;display:flex;flex-direction:column;gap:8px}
.rec-body h3{
  font-size:16px;
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rec-body .rec-meta{font-size:13px;color:var(--muted);margin-top:auto}

/* ============ 返回与 CTA ============ */
.back-strip{
  border-top:1px solid var(--line);
  padding:28px 0 0;
  display:flex;
  flex-wrap:wrap;
  gap:22px;
}
.cta-band{
  margin-top:clamp(40px,6vw,72px);
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(24px,4vw,44px);
  display:grid;
  grid-template-columns:1fr;
  gap:22px;
  align-items:center;
}
@media (min-width:1024px){
  .cta-band{grid-template-columns:minmax(0,1fr) auto;gap:32px}
}
.cta-band h2{font-size:clamp(20px,2.6vw,28px);margin-bottom:10px}
.cta-band p{color:var(--muted);margin:0;font-size:15px;max-width:56ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ============ FAQ ============ */
.faq-section{padding:0 0 var(--space-section)}
.accordion.article-faq{margin:0;background:transparent;border:none}
.accordion.article-faq .accordion-item{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:12px;
  margin-bottom:14px;
  overflow:hidden;
  position:relative;
  transition:border-color .18s ease;
}
.accordion.article-faq .accordion-item:hover{border-color:rgba(18,214,180,.28)}
.accordion.article-faq .accordion-item.is-active::before{
  content:"";
  position:absolute;left:0;top:0;bottom:0;
  width:4px;background:var(--brand);
}
.accordion.article-faq .accordion-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  border:none;
  background:transparent;
  line-height:1.6;
}
.accordion.article-faq .accordion-title::before{
  content:"";
  order:2;
  flex:0 0 auto;
  width:9px;height:9px;
  margin-right:4px;
  border-right:2px solid var(--brand);
  border-bottom:2px solid var(--brand);
  transform:rotate(45deg) translate(-2px,2px);
  transition:transform .22s ease;
}
.accordion.article-faq .accordion-title[aria-expanded="true"]::before{
  transform:rotate(-135deg) translate(-2px,-2px);
}
.accordion.article-faq .accordion-title:hover{color:var(--brand)}
.accordion.article-faq .accordion-content{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
  border:none;
  background:transparent;
}
.accordion.article-faq .accordion-content p:last-child{margin-bottom:0}

/* ============ 页脚 ============ */
.site-footer{
  background:#0A0F12;
  border-top:1px solid var(--line);
  padding:clamp(44px,6vw,72px) 0 0;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  padding-bottom:40px;
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand strong{display:block;font-size:16px;margin-bottom:12px}
.footer-brand p{color:var(--muted);font-size:13px;line-height:1.8;margin:0;max-width:34ch}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:16px;font-weight:600}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a,.footer-col ul span{font-size:13px;color:var(--muted);line-height:1.7}
.footer-col ul a:hover{color:var(--brand)}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 28px;
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  justify-content:space-between;
  font-size:13px;
  color:var(--muted);
}
.footer-bottom .dot-sep{margin:0 6px;opacity:.6}

@media (max-width:639px){
  body{font-size:16px}
  .article-body{font-size:16px}
  .paper{padding:24px 20px;border-radius:14px}
  .rec-card{flex-direction:column}
  .rec-thumb{flex:0 0 auto;width:100%;aspect-ratio:16/9}
  .breadcrumb .current{white-space:normal;max-width:100%}
  .cta-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}

/* roulang page: category1 */
:root{
  --ink-900:#0E1418;
  --ink-800:#161E23;
  --ink-700:#1F2A31;
  --brand:#12D6B4;
  --brand-hover:#2FE6C6;
  --accent:#FFB020;
  --violet:#7C6CFF;
  --text:#E8EEF1;
  --muted:#93A3AC;
  --line:rgba(255,255,255,.08);
  --paper:#F6F4EF;
  --paper-text:#1B2226;
  --paper-line:#E2DDD3;
  --danger:#FF6B6B;
  --radius-xs:6px;
  --radius-sm:10px;
  --radius-md:14px;
  --radius-lg:20px;
  --shadow-1:0 10px 30px rgba(0,0,0,.35);
  --shadow-2:0 16px 40px rgba(0,0,0,.5);
  --container:1200px;
  --section-y:clamp(56px,8vw,104px);
  --font:"Inter",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color 180ms ease;}
a:hover{color:var(--brand);}
button,input{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:600;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(18,214,180,.3);color:#fff;}

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

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(14,20,24,.86);
  backdrop-filter:saturate(140%) blur(8px);
  transition:background 200ms ease,box-shadow 200ms ease,border-color 200ms ease;
  border-bottom:1px solid transparent;
}
.site-header.is-stuck{
  background:rgba(14,20,24,.92);
  border-bottom:1px solid var(--line);
  box-shadow:0 6px 20px rgba(0,0,0,.35);
}
.brand-bar{height:56px;display:flex;align-items:center;}
.brand-inner{display:flex;align-items:center;gap:20px;width:100%;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:34px;height:34px;flex:0 0 34px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid rgba(18,214,180,.35);
  border-radius:10px;
  background:rgba(18,214,180,.08);
}
.brand-mark svg{width:20px;height:20px;display:block;}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.01em;color:var(--text);}
.brand-text em{font-size:12px;font-style:normal;color:var(--muted);letter-spacing:.04em;}
.nav-search{
  margin-left:auto;
  display:flex;align-items:center;
  background:#12191E;
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--radius-sm);
  height:44px;
  overflow:hidden;
  min-width:0;
  flex:0 1 320px;
  transition:border-color 180ms ease,box-shadow 180ms ease;
}
.nav-search:focus-within{
  border-color:var(--brand);
  box-shadow:0 0 0 2px rgba(18,214,180,.28);
}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;
  background:transparent;border:0;outline:none;
  padding:0 14px;font-size:14px;color:var(--text);
}
.nav-search input::placeholder{color:var(--muted);}
.nav-search button{
  flex:0 0 auto;height:100%;padding:0 18px;
  background:var(--brand);color:#06231E;border:0;
  font-size:14px;font-weight:600;letter-spacing:.02em;
  transition:background 180ms ease;
}
.nav-search button:hover{background:var(--brand-hover);}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  margin-left:8px;
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform 180ms ease,opacity 180ms ease;}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.channel-bar{border-top:1px solid var(--line);}
.channel-inner{display:flex;align-items:center;gap:24px;min-height:44px;padding-top:6px;padding-bottom:6px;}
.channel-list{display:flex;align-items:center;gap:22px;flex-wrap:wrap;}
.channel-list a{
  position:relative;
  display:inline-block;
  font-size:14px;
  color:var(--muted);
  padding:8px 0;
}
.channel-list a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);
  transition:width 180ms ease;
}
.channel-list a:hover{color:var(--text);}
.channel-list a:hover::after{width:100%;}
.channel-list a.is-active{color:var(--brand);font-weight:600;}
.channel-list a.is-active::after{width:100%;}
.hot-tags{
  margin-left:auto;
  display:flex;align-items:center;gap:10px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
  white-space:nowrap;
}
.hot-tags::-webkit-scrollbar{display:none;}
.hot-label{font-size:13px;color:var(--muted);flex:0 0 auto;}
.hot-tags a{
  flex:0 0 auto;
  font-size:13px;
  color:var(--muted);
  padding:5px 12px;
  border:1px solid var(--line);
  border-radius:999px;
  transition:color 180ms ease,border-color 180ms ease,background 180ms ease;
}
.hot-tags a:hover{color:var(--brand);border-color:rgba(18,214,180,.4);background:rgba(18,214,180,.08);}

@media (max-width:1023px){
  .channel-bar{
    display:none;
    background:var(--ink-800);
    border-top:1px solid var(--line);
  }
  .channel-bar.is-open{display:block;}
  .channel-inner{flex-direction:column;align-items:stretch;gap:8px;padding-top:12px;padding-bottom:16px;}
  .channel-list{flex-direction:column;align-items:stretch;gap:0;}
  .channel-list a{display:block;padding:12px 2px;font-size:15px;min-height:48px;border-bottom:1px solid var(--line);}
  .channel-list a::after{display:none;}
  .hot-tags{margin-left:0;flex-wrap:wrap;white-space:normal;overflow:visible;}
  .nav-toggle{display:flex;}
  .nav-search{flex:1 1 auto;min-width:0;}
  .nav-search button{padding:0 14px;}
  .brand-text em{display:none;}
}
@media (max-width:520px){
  .brand-text strong{font-size:15px;}
  .nav-search input{font-size:13px;padding:0 10px;}
  .nav-search button{font-size:13px;padding:0 12px;}
}

/* ---------- Page head ---------- */
.page-head{
  position:relative;
  border-bottom:1px solid var(--line);
  background:
    linear-gradient(180deg,rgba(14,20,24,.82) 0%,rgba(14,20,24,.94) 60%,var(--ink-900) 100%),
    url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  padding:clamp(32px,5vw,56px) 0 clamp(32px,5vw,52px);
}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:16px;flex-wrap:wrap;}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:rgba(147,163,172,.6);}
.crumbs .now{color:var(--text);}
.page-head h1{
  font-size:clamp(26px,4vw,40px);
  font-weight:700;
  letter-spacing:.01em;
  max-width:900px;
}
.page-head .lead{
  margin-top:14px;
  max-width:760px;
  color:var(--muted);
  font-size:16px;
}
.paper-note{
  margin-top:24px;
  background:var(--paper);
  color:var(--paper-text);
  border-radius:16px;
  padding:clamp(20px,3vw,30px) clamp(20px,3vw,34px);
  max-width:900px;
  border:1px solid var(--paper-line);
}
.paper-note p{font-size:16px;line-height:1.85;color:#3B4448;}
.paper-note p + p{margin-top:10px;}
.paper-note strong{color:#12181B;font-weight:600;}

/* ---------- Shell grid ---------- */
.section{padding:var(--section-y) 0;}
.section-tight{padding:clamp(40px,5vw,68px) 0;}
.shell-grid{
  display:grid;
  grid-template-columns:320px minmax(0,1fr);
  gap:40px;
  align-items:start;
}
@media (max-width:1023px){
  .shell-grid{grid-template-columns:1fr;gap:28px;}
}

/* ---------- Side rail ---------- */
.side-rail{
  position:sticky;
  top:104px;
  display:flex;
  flex-direction:column;
  gap:20px;
}
.rail-card{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:20px;
}
.rail-title{
  font-size:12px;
  letter-spacing:.12em;
  color:var(--brand);
  font-weight:600;
  margin-bottom:14px;
}
.rail-nav li + li{margin-top:2px;}
.rail-nav a{
  display:block;
  padding:9px 12px;
  border-left:2px solid transparent;
  border-radius:0 var(--radius-xs) var(--radius-xs) 0;
  font-size:14px;
  color:var(--muted);
  transition:background 180ms ease,color 180ms ease,border-color 180ms ease;
}
.rail-nav a:hover{background:rgba(255,255,255,.04);color:var(--text);}
.rail-nav a.is-current{
  color:var(--brand);
  border-left-color:var(--brand);
  background:rgba(18,214,180,.08);
  font-weight:600;
}
.pill-group{display:flex;flex-wrap:wrap;gap:8px;}
.pill{
  display:inline-block;
  font-size:13px;
  padding:6px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  color:var(--muted);
  background:rgba(255,255,255,.02);
  transition:color 180ms ease,border-color 180ms ease,background 180ms ease;
}
.pill:hover{color:var(--brand);border-color:rgba(18,214,180,.4);background:rgba(18,214,180,.08);}
.pill.is-violet{color:#B9B1FF;border-color:rgba(124,108,255,.35);background:rgba(124,108,255,.12);}
.pill.is-violet:hover{color:#CFC9FF;border-color:rgba(124,108,255,.6);}
.rail-cta{
  background:linear-gradient(160deg,rgba(18,214,180,.14),rgba(255,176,32,.08));
  border:1px solid rgba(18,214,180,.28);
  border-radius:var(--radius-md);
  padding:20px;
}
.rail-cta h3{font-size:16px;font-weight:600;margin-bottom:8px;}
.rail-cta p{font-size:14px;color:var(--muted);margin-bottom:16px;}
.rail-cta .btn{width:100%;}

@media (max-width:1023px){
  .side-rail{position:static;top:auto;}
  .rail-card{padding:16px;}
  .rail-nav{display:flex;gap:10px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding-bottom:4px;}
  .rail-nav::-webkit-scrollbar{display:none;}
  .rail-nav li + li{margin-top:0;}
  .rail-nav li{flex:0 0 auto;}
  .rail-nav a{white-space:nowrap;border-left:0;border:1px solid var(--line);border-radius:999px;padding:8px 14px;}
  .rail-nav a.is-current{border-color:rgba(18,214,180,.5);}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;
  border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  transition:background 180ms ease,color 180ms ease,border-color 180ms ease,transform 180ms ease,box-shadow 180ms ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#06231E;}
.btn-primary:hover{background:var(--brand-hover);color:#06231E;transform:translateY(-1px);}
.btn-ghost{background:transparent;color:var(--brand);border-color:rgba(18,214,180,.55);}
.btn-ghost:hover{background:rgba(18,214,180,.1);color:var(--brand-hover);}
.btn-grad{background:linear-gradient(90deg,var(--brand),var(--accent));color:#06231E;}
.btn-grad:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(18,214,180,.22);color:#06231E;}
.btn-plain{
  background:transparent;color:var(--text);border:0;padding:0;height:auto;
  border-bottom:1px solid transparent;
}
.btn-plain:hover{color:var(--brand);border-bottom-color:var(--brand);}
.btn-sm{height:42px;font-size:14px;padding:0 18px;}

/* ---------- Badges ---------- */
.badge{
  display:inline-flex;align-items:center;
  font-size:12px;line-height:1;
  padding:5px 9px;
  border-radius:var(--radius-xs);
  font-weight:500;
  white-space:nowrap;
}
.badge-brand{background:rgba(18,214,180,.14);color:var(--brand);}
.badge-accent{background:rgba(255,176,32,.14);color:var(--accent);}
.badge-violet{background:rgba(124,108,255,.16);color:#B9B1FF;}

/* ---------- Section heads ---------- */
.sec-head{margin-bottom:26px;}
.eyebrow{
  display:block;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--brand);
  font-weight:600;
  margin-bottom:8px;
}
.sec-head h2{
  font-size:clamp(22px,3vw,30px);
  padding-left:14px;
  position:relative;
}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;
  background:var(--brand);
}
.sec-head p{margin-top:10px;color:var(--muted);font-size:15px;padding-left:14px;max-width:720px;}
.flow-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
  margin-bottom:24px;
}
.flow-head h2{font-size:clamp(20px,2.6vw,26px);}
.flow-head a{font-size:14px;color:var(--brand);}

/* ---------- Content flow cards ---------- */
.content-flow{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
@media (max-width:767px){
  .content-flow{grid-template-columns:1fr;gap:20px;}
}
.flow-card{
  display:flex;flex-direction:column;
  background:var(--ink-700);
  border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius-md);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform 180ms ease,border-color 180ms ease,box-shadow 180ms ease;
}
.flow-card:hover{
  transform:translateY(-4px);
  border-color:rgba(18,214,180,.3);
  box-shadow:var(--shadow-2);
}
.flow-thumb{display:block;overflow:hidden;background:#0C1215;}
.flow-thumb img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  transition:transform 220ms ease;
}
.flow-card:hover .flow-thumb img{transform:scale(1.04);}
.flow-body{padding:20px;display:flex;flex-direction:column;gap:12px;}
.flow-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted);}
.flow-body h3{font-size:18px;font-weight:600;line-height:1.4;}
.flow-body h3 a{
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  color:var(--text);
}
.flow-body h3 a:hover{color:var(--brand);}
.flow-body p{
  font-size:15px;color:var(--muted);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.flow-more{font-size:14px;color:var(--brand);font-weight:500;}

/* ---------- Steps band ---------- */
.steps-band{
  background:var(--ink-800);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stepper{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:24px;
  counter-reset:step;
}
@media (max-width:1023px){
  .stepper{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:520px){
  .stepper{grid-template-columns:1fr;gap:18px;}
}
.step-item{
  position:relative;
  padding:22px 20px 22px 20px;
  background:var(--ink-700);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
}
.step-item::after{
  content:"";
  position:absolute;top:34px;right:-24px;width:24px;
  border-top:1px dashed rgba(18,214,180,.4);
}
.step-item:last-child::after{display:none;}
@media (max-width:1023px){
  .step-item::after{display:none;}
}
.step-no{
  width:34px;height:34px;border-radius:50%;
  border:1px solid rgba(18,214,180,.55);
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:600;
  margin-bottom:14px;
  background:rgba(18,214,180,.08);
}
.step-item h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.step-item p{font-size:15px;color:var(--muted);line-height:1.75;}

/* ---------- Checklist ---------- */
.check-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
@media (max-width:1023px){.check-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:639px){.check-grid{grid-template-columns:1fr;}}
.check-item{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:22px;
}
.check-item h3{font-size:17px;font-weight:600;margin-bottom:12px;display:flex;align-items:center;gap:10px;}
.check-item h3::before{
  content:"";width:8px;height:8px;border-radius:2px;background:var(--accent);flex:0 0 8px;
}
.check-item ul li{
  position:relative;
  padding-left:16px;
  font-size:15px;color:var(--muted);line-height:1.8;
}
.check-item ul li + li{margin-top:8px;}
.check-item ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;
  background:rgba(18,214,180,.7);
}

/* ---------- Progress rows ---------- */
.progress-block{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  padding:clamp(22px,3vw,34px);
}
.progress-row + .progress-row{margin-top:22px;}
.progress-row .top{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:10px;}
.progress-row .name{font-size:15px;color:var(--text);}
.progress-row .val{font-size:15px;color:var(--accent);font-variant-numeric:tabular-nums;font-weight:600;}
.track{height:8px;border-radius:999px;background:rgba(255,255,255,.08);overflow:hidden;}
.track > span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--accent));}

/* ---------- FAQ ---------- */
.faq-band{background:var(--ink-800);border-top:1px solid var(--line);}
.faq-list{max-width:900px;margin:0 auto;}
.faq-list .accordion-item{
  background:var(--ink-700)!important;
  border:1px solid var(--line)!important;
  border-radius:var(--radius-md)!important;
  overflow:hidden;
  margin-bottom:14px;
  position:relative;
}
.faq-list .accordion-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:transparent;transition:background 180ms ease;
}
.faq-list .accordion-item.is-active::before{background:var(--brand);}
.faq-list .accordion-title{
  background:transparent!important;
  border:0!important;
  color:var(--text)!important;
  font-size:16px!important;
  font-weight:600;
  padding:18px 54px 18px 22px!important;
  position:relative;
}
.faq-list .accordion-title::before{display:none!important;}
.faq-list .accordion-title::after{
  content:"";position:absolute;right:22px;top:50%;
  width:8px;height:8px;
  border-right:2px solid var(--brand);
  border-bottom:2px solid var(--brand);
  transform:translateY(-70%) rotate(45deg);
  transition:transform 200ms ease;
}
.faq-list .accordion-item.is-active .accordion-title::after{transform:translateY(-30%) rotate(-135deg);}
.faq-list .accordion-content{
  background:transparent!important;
  border:0!important;
  color:var(--muted)!important;
  font-size:15px;
  line-height:1.8;
  padding:0 22px 20px 22px!important;
}
.faq-list .accordion-content p{margin:0;}

/* ---------- CTA band ---------- */
.cta-band{
  background:#101719;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.cta-box{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:clamp(26px,4vw,44px);
  border-radius:var(--radius-lg);
  background:var(--ink-800);
  border:1px solid var(--line);
}
.cta-box h2{font-size:clamp(20px,2.6vw,26px);margin-bottom:10px;}
.cta-box p{color:var(--muted);font-size:15px;max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- Footer ---------- */
.site-footer{
  background:#0A0F12;
  border-top:1px solid var(--line);
  padding:clamp(40px,5vw,64px) 0 0;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:36px;
}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media (max-width:520px){.footer-grid{grid-template-columns:1fr;gap:24px;}}
.footer-brand strong{font-size:16px;font-weight:700;display:block;margin-bottom:10px;}
.footer-brand p{color:var(--muted);font-size:14px;line-height:1.8;max-width:320px;}
.footer-col h4{font-size:14px;font-weight:600;margin-bottom:14px;letter-spacing:.04em;}
.footer-col ul li + li{margin-top:10px;}
.footer-col a,.footer-col span{color:var(--muted);font-size:14px;}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:18px 0 24px;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.dot-sep{margin:0 8px;opacity:.6;}

/* roulang page: category2 */
:root{
  --ink-900:#0E1418;
  --ink-800:#161E23;
  --ink-700:#1F2A31;
  --brand:#12D6B4;
  --brand-hover:#2FE6C6;
  --accent:#FFB020;
  --violet:#7C6CFF;
  --text:#E8EEF1;
  --muted:#93A3AC;
  --line:rgba(255,255,255,.08);
  --paper:#F6F4EF;
  --paper-text:#1B2226;
  --paper-line:#E2DDD3;
  --radius-s:10px;
  --radius-m:14px;
  --radius-l:20px;
  --shadow-1:0 10px 30px rgba(0,0,0,.35);
  --shadow-2:0 16px 40px rgba(0,0,0,.5);
  --gap:24px;
  --section-gap:clamp(56px,8vw,104px);
  --font:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-900);
  color:var(--text);
  font-family:var(--font);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:6px;
}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:600}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
@media (min-width:1024px){
  .container{padding:0 32px}
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(14,20,24,.86);
  transition:background .2s ease,box-shadow .2s ease,border-color .2s ease;
  border-bottom:1px solid transparent;
}
.site-header.is-stuck{
  background:rgba(14,20,24,.92);
  border-bottom-color:var(--line);
  box-shadow:0 6px 20px rgba(0,0,0,.35);
}
.brand-bar{border-bottom:1px solid var(--line)}
.brand-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:56px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark svg{width:26px;height:26px;display:block}
.brand-text strong{
  display:block;
  font-size:16px;
  font-weight:700;
  letter-spacing:.01em;
  color:var(--text);
  white-space:nowrap;
}
.brand-text em{
  display:block;
  font-style:normal;
  font-size:12px;
  line-height:1.4;
  color:var(--muted);
}
.nav-search{
  margin-left:auto;
  display:flex;
  height:38px;
  align-items:stretch;
}
.nav-search input{
  width:230px;
  padding:0 14px;
  font-size:14px;
  color:var(--text);
  background:#12191E;
  border:1px solid rgba(255,255,255,.12);
  border-right:0;
  border-radius:var(--radius-s) 0 0 var(--radius-s);
  transition:border-color .18s ease,box-shadow .18s ease;
}
.nav-search input::placeholder{color:var(--muted)}
.nav-search input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 2px rgba(18,214,180,.25);
}
.nav-search button{
  border:0;
  padding:0 16px;
  font-size:14px;
  font-weight:600;
  color:#06251E;
  background:var(--brand);
  border-radius:0 var(--radius-s) var(--radius-s) 0;
  cursor:pointer;
  transition:background .18s ease;
}
.nav-search button:hover{background:var(--brand-hover)}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--radius-s);
  cursor:pointer;
  padding:10px 11px;
  flex-direction:column;
  justify-content:space-between;
}
.nav-toggle span{display:block;height:2px;background:var(--text);border-radius:2px}

.channel-bar{border-bottom:1px solid var(--line)}
.channel-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:44px;
}
.channel-list{
  display:flex;
  align-items:center;
  gap:24px;
  overflow-x:auto;
  scrollbar-width:none;
  flex:1 1 auto;
}
.channel-list::-webkit-scrollbar{display:none}
.channel-list a{
  display:inline-block;
  padding:11px 0;
  font-size:14px;
  color:var(--muted);
  white-space:nowrap;
  border-bottom:2px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.channel-list a:hover{color:var(--text)}
.channel-list a.is-active{
  color:var(--brand);
  border-bottom-color:var(--brand);
}
.hot-tags{
  display:flex;
  align-items:center;
  gap:8px;
  flex:0 0 auto;
  max-width:46%;
  overflow-x:auto;
  scrollbar-width:none;
}
.hot-tags::-webkit-scrollbar{display:none}
.hot-label{font-size:12px;color:var(--muted);white-space:nowrap}
.hot-tags a{
  font-size:12px;
  padding:5px 11px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--muted);
  white-space:nowrap;
  transition:color .18s ease,border-color .18s ease,background .18s ease;
}
.hot-tags a:hover{
  color:var(--brand);
  border-color:rgba(18,214,180,.4);
  background:rgba(18,214,180,.08);
}

/* ============ 页面头 ============ */
.page-head{
  padding:clamp(36px,5vw,64px) 0 clamp(24px,3vw,36px);
  position:relative;
  overflow:hidden;
}
.page-head::after{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(680px 300px at 88% -30%,rgba(18,214,180,.14),transparent 70%);
  pointer-events:none;
}
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:18px;
  position:relative;
  z-index:1;
}
.crumbs a{color:var(--muted);transition:color .18s ease}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:rgba(255,255,255,.24)}
.crumbs .current{color:var(--text)}
.page-head h1{
  font-size:clamp(28px,4.2vw,42px);
  font-weight:700;
  letter-spacing:-.01em;
  max-width:900px;
  position:relative;
  z-index:1;
}
.page-head h1 .hl{color:var(--brand)}
.page-lead{
  margin-top:16px;
  max-width:760px;
  color:var(--muted);
  font-size:16px;
  position:relative;
  z-index:1;
}
.head-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
  position:relative;
  z-index:1;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  padding:5px 10px;
  border-radius:6px;
  background:rgba(18,214,180,.14);
  color:var(--brand);
  font-weight:500;
}
.badge.amber{background:rgba(255,176,32,.14);color:var(--accent)}
.badge.violet{background:rgba(124,108,255,.14);color:var(--violet)}
.badge.plain{background:rgba(255,255,255,.05);color:var(--muted)}

/* ============ 标签筛选条 ============ */
.filter-strip{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:var(--ink-800);
}
.filter-inner{
  display:flex;
  align-items:center;
  gap:12px;
  padding:14px 0;
  overflow-x:auto;
  scrollbar-width:none;
}
.filter-inner::-webkit-scrollbar{display:none}
.filter-label{
  font-size:13px;
  color:var(--muted);
  white-space:nowrap;
  padding-right:4px;
  border-right:1px solid var(--line);
  margin-right:4px;
}
.chip{
  border:1px solid var(--line);
  background:transparent;
  color:var(--muted);
  font-size:13px;
  padding:8px 16px;
  border-radius:999px;
  cursor:pointer;
  white-space:nowrap;
  transition:all .18s ease;
}
.chip:hover{color:var(--text);border-color:rgba(255,255,255,.2)}
.chip.is-active{
  color:#06251E;
  background:var(--brand);
  border-color:var(--brand);
  font-weight:600;
}
.filter-note{
  font-size:13px;
  color:var(--muted);
  padding:0 0 0 4px;
  white-space:nowrap;
}

/* ============ 板块标题 ============ */
.section{padding:var(--section-gap) 0}
.section.tight{padding:clamp(40px,5vw,64px) 0}
.section-head{margin-bottom:clamp(28px,4vw,44px)}
.eyebrow{
  display:block;
  font-size:13px;
  letter-spacing:.08em;
  color:var(--brand);
  margin-bottom:12px;
  font-weight:500;
}
.section-head h2{
  font-size:clamp(22px,3vw,30px);
  padding-left:16px;
  position:relative;
}
.section-head h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.14em;
  bottom:.14em;
  width:4px;
  border-radius:2px;
  background:var(--brand);
}
.section-head p{
  margin-top:14px;
  color:var(--muted);
  font-size:16px;
  max-width:760px;
}

/* ============ 瀑布卡 ============ */
.falls{
  column-count:3;
  column-gap:var(--gap);
}
.fall-card{
  break-inside:avoid;
  margin:0 0 var(--gap);
  background:var(--ink-700);
  border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius-m);
  box-shadow:var(--shadow-1);
  overflow:hidden;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.fall-card:hover{
  transform:translateY(-4px);
  border-color:rgba(18,214,180,.3);
  box-shadow:var(--shadow-2);
}
.fall-thumb{
  overflow:hidden;
  aspect-ratio:16/9;
  background:var(--ink-800);
}
.fall-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .3s ease;
}
.fall-card:hover .fall-thumb img{transform:scale(1.04)}
.fall-body{padding:20px}
.fall-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:12px;
  font-size:13px;
  color:var(--muted);
}
.fall-body h3{
  font-size:19px;
  font-weight:600;
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.fall-body p{
  font-size:15px;
  color:var(--muted);
  line-height:1.8;
}
.fall-body .line{color:rgba(255,255,255,.16);margin:0 6px}
.tag{
  display:inline-block;
  font-size:12px;
  padding:4px 9px;
  border-radius:6px;
  background:rgba(18,214,180,.14);
  color:var(--brand);
  white-space:nowrap;
}
.tag.amber{background:rgba(255,176,32,.14);color:var(--accent)}
.tag.violet{background:rgba(124,108,255,.14);color:var(--violet)}

/* ============ 重点条目通栏卡 ============ */
.feature{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  gap:0;
  background:var(--ink-800);
  border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius-l);
  overflow:hidden;
  box-shadow:var(--shadow-1);
}
.feature-media{
  position:relative;
  min-height:280px;
  background:#0B1014 url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.feature-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/9}
.feature-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(120deg,rgba(14,20,24,.7),rgba(14,20,24,.15));
}
.feature-body{
  padding:clamp(24px,3.4vw,44px);
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:16px;
}
.feature-body h3{
  font-size:clamp(20px,2.4vw,26px);
  font-weight:700;
}
.feature-body p{
  font-size:16px;
  color:var(--muted);
}
.feature-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  font-size:15px;
  font-weight:600;
  border-radius:var(--radius-s);
  border:1px solid transparent;
  cursor:pointer;
  transition:all .18s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand);
  color:#06251E;
}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px)}
.btn-ghost{
  border-color:rgba(18,214,180,.5);
  color:var(--brand);
  background:transparent;
}
.btn-ghost:hover{background:rgba(18,214,180,.08);transform:translateY(-1px)}
.btn-plain{
  color:var(--text);
  background:rgba(255,255,255,.05);
  border-color:var(--line);
}
.btn-plain:hover{background:rgba(255,255,255,.09);transform:translateY(-1px)}
.btn-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand);
  font-size:15px;
  font-weight:600;
  border-bottom:1px solid transparent;
  transition:border-color .18s ease,color .18s ease;
}
.btn-link:hover{border-bottom-color:var(--brand)}

/* ============ 故障速查表 ============ */
.check-table{
  width:100%;
  border-collapse:collapse;
  background:var(--ink-800);
  border:1px solid rgba(255,255,255,.06);
  border-radius:var(--radius-m);
  overflow:hidden;
  font-size:15px;
}
.check-table th,
.check-table td{
  text-align:left;
  padding:16px 20px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
.check-table th{
  font-size:13px;
  letter-spacing:.06em;
  color:var(--muted);
  font-weight:500;
  background:#121A1F;
  white-space:nowrap;
}
.check-table tr:last-child td{border-bottom:0}
.check-table td:first-child{color:var(--text);font-weight:600;white-space:nowrap}
.check-table td{color:var(--muted)}
.table-scroll{overflow-x:auto;border-radius:var(--radius-m)}

/* ============ 排查顺序 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:var(--gap);
  position:relative;
}
.step{
  position:relative;
  padding-top:26px;
}
.step::before{
  content:"";
  position:absolute;
  top:11px;
  left:24px;
  right:-24px;
  height:1px;
  background:repeating-linear-gradient(90deg,rgba(18,214,180,.45) 0 6px,transparent 6px 14px);
}
.step:last-child::before{display:none}
.step-num{
  position:absolute;
  top:0;
  left:0;
  width:24px;
  height:24px;
  border-radius:50%;
  border:1px solid var(--brand);
  color:var(--brand);
  font-size:12px;
  font-weight:600;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--ink-900);
}
.step h3{font-size:18px;margin-bottom:8px;padding-left:0}
.step p{font-size:15px;color:var(--muted)}

/* ============ 说明纸感块 ============ */
.paper-note{
  background:var(--paper);
  color:var(--paper-text);
  border-radius:var(--radius-m);
  padding:clamp(22px,3vw,32px);
  font-size:16px;
  line-height:1.85;
  border:1px solid var(--paper-line);
  max-width:900px;
}
.paper-note strong{color:#0F1A18}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px}
.faq-wrap .accordion{
  background:transparent;
  border:0;
  margin:0;
}
.faq-wrap .accordion-item{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:12px;
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-wrap .accordion-item.is-active{
  border-color:rgba(18,214,180,.35);
  box-shadow:inset 4px 0 0 var(--brand),var(--shadow-1);
}
.faq-wrap .accordion-title{
  position:relative;
  padding:18px 52px 18px 20px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  background:transparent;
  border:0;
  line-height:1.6;
  transition:color .18s ease;
}
.faq-wrap .accordion-item.is-active .accordion-title{color:var(--brand)}
.faq-wrap .accordion-title::before{display:none !important}
.faq-wrap .accordion-title::after{
  content:"";
  position:absolute;
  right:22px;
  top:50%;
  width:8px;
  height:8px;
  border-right:2px solid var(--brand);
  border-bottom:2px solid var(--brand);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .22s ease;
}
.faq-wrap .accordion-item.is-active .accordion-title::after{
  transform:translateY(-30%) rotate(-135deg);
}
.faq-wrap .accordion-content{
  background:transparent;
  border:0;
  border-top:1px dashed var(--line);
  color:var(--muted);
  font-size:15px;
  line-height:1.8;
  padding:16px 20px 20px;
}
.faq-wrap .accordion-content p{margin:0}

/* ============ CTA 条 ============ */
.cta-band{
  background:linear-gradient(180deg,rgba(22,30,35,1),rgba(14,20,24,1));
  border:1px solid rgba(255,255,255,.07);
  border-radius:var(--radius-l);
  padding:clamp(28px,4vw,52px);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  box-shadow:var(--shadow-1);
}
.cta-band h2{
  font-size:clamp(20px,2.6vw,28px);
  margin-bottom:10px;
}
.cta-band p{color:var(--muted);font-size:16px;max-width:640px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:var(--section-gap);
  background:#0A0F12;
  border-top:1px solid var(--line);
  padding:clamp(40px,5vw,64px) 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:36px;
}
.footer-brand strong{
  display:block;
  font-size:16px;
  font-weight:700;
  margin-bottom:12px;
}
.footer-brand p{
  font-size:13px;
  color:var(--muted);
  line-height:1.9;
  max-width:320px;
}
.footer-col h4{
  font-size:14px;
  font-weight:600;
  margin-bottom:16px;
  color:var(--text);
}
.footer-col ul li{margin-bottom:10px}
.footer-col a,
.footer-col span{
  font-size:13px;
  color:var(--muted);
  transition:color .18s ease;
}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:18px 0 24px;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:var(--muted);
}
.dot-sep{margin:0 8px;color:rgba(255,255,255,.2)}

/* ============ 响应式 ============ */
@media (max-width:1023px){
  .nav-toggle{display:flex}
  .brand-text em{display:none}
  .brand-text strong{font-size:15px}
  .nav-search{margin-left:auto}
  .nav-search input{width:170px}
  .channel-bar{
    display:none;
    background:var(--ink-800);
    border-bottom:1px solid var(--line);
  }
  .channel-bar.is-open{display:block}
  .channel-inner{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:12px 0 20px;
  }
  .channel-list{
    flex-direction:column;
    gap:0;
    overflow:visible;
  }
  .channel-list li{border-bottom:1px solid var(--line)}
  .channel-list a{
    display:block;
    min-height:48px;
    line-height:48px;
    padding:0;
    border-bottom:0;
    font-size:15px;
  }
  .channel-list a.is-active{color:var(--brand);border-bottom:0}
  .hot-tags{
    max-width:100%;
    flex-wrap:wrap;
    margin-top:16px;
    padding-top:16px;
    border-top:1px solid var(--line);
  }
  .falls{column-count:2}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step:nth-child(2n)::before{display:none}
  .feature{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .falls{column-count:1}
  .steps{grid-template-columns:1fr}
  .step::before{display:none}
  .step{margin-bottom:22px}
  .step:last-child{margin-bottom:0}
  .cta-band{flex-direction:column;align-items:flex-start}
}
@media (max-width:640px){
  body{font-size:16px}
  .nav-search{display:none}
  .brand-inner{gap:12px}
  .falls{column-count:1}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .btn{width:100%}
  .feature-actions .btn,.cta-actions .btn{width:100%}
  .check-table th,.check-table td{padding:14px 16px}
}