/* roulang page: index */
:root{
  --c-bg:#0B0B12;
  --c-bg-2:#12121C;
  --c-card:#171723;
  --c-layer:#1D1D2B;
  --c-primary:#2BE7C8;
  --c-primary-dark:#12B79E;
  --c-accent:#7B5CFF;
  --c-warn:#FF8A3D;
  --t-main:#E8EAF2;
  --t-sub:#A0A4B8;
  --t-weak:#6E7288;
  --t-invert:#06110F;
  --s-ok:#3DDC84;
  --s-warn:#FFC24B;
  --s-err:#FF5C7A;
  --line:rgba(255,255,255,.07);
  --line-strong:rgba(43,231,200,.45);
  --r-card:16px;
  --r-btn:10px;
  --r-input:10px;
  --r-pill:999px;
  --r-img:12px;
  --r-modal:18px;
  --sh-card:0 8px 24px rgba(0,0,0,.35);
  --sh-hover:0 14px 34px rgba(43,231,200,.14);
  --sh-modal:0 24px 60px rgba(0,0,0,.6);
  --container:1200px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono","Cascadia Mono",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  padding-top:68px;
  background:var(--c-bg);
  color:var(--t-main);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .2s ease}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700}
h1{font-size:clamp(26px,4.4vw,46px);line-height:1.25}
h2{font-size:clamp(22px,2.6vw,32px)}
h3{font-size:19px;font-weight:600}
h4{font-size:16px;font-weight:600}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.08em;color:var(--c-primary);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:32px;height:1px;background:var(--c-primary);display:block}
.section-title{position:relative;padding-left:16px}
.section-title::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;
  border-radius:2px;background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:40px;flex-wrap:wrap;
}
.section-sub{max-width:760px;color:var(--t-sub);font-size:15px;margin-top:14px}
.divider{height:1px;background:linear-gradient(90deg,transparent,rgba(43,231,200,.45) 45%,rgba(123,92,255,.45) 55%,transparent)}

/* 顶部导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(11,11,18,.86);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent);
  opacity:.7;
}
.site-header.scrolled{background:rgba(11,11,18,.96);box-shadow:0 6px 22px rgba(0,0,0,.5)}
.nav-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;flex-shrink:0}
.brand svg{width:28px;height:28px;flex:0 0 auto}
.brand:hover{color:var(--c-primary)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{
  position:relative;padding:8px 11px;font-size:15px;color:var(--t-sub);
  border-radius:8px;white-space:nowrap;
}
.nav-link:hover{color:var(--c-primary);background:rgba(43,231,200,.06)}
.nav-link.active{color:var(--c-primary);text-shadow:0 0 12px rgba(43,231,200,.55)}
.nav-link.active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:2px;height:2px;
  border-radius:2px;background:var(--c-primary);
}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);
  background:transparent;border-radius:10px;padding:0;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-primary);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-primary);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--c-primary);color:var(--t-invert)}
.btn-primary:hover{background:#3ff0d2;transform:translateY(-2px);box-shadow:0 12px 30px rgba(43,231,200,.28)}
.btn-primary:active{background:var(--c-primary-dark);transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--c-primary)}
.btn-ghost:hover{background:rgba(43,231,200,.08);transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--c-primary);font-size:14px;font-weight:600;
}
.btn-text svg{transition:transform .2s ease}
.btn-text:hover svg{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;padding:4px 10px;border-radius:var(--r-pill);
  background:rgba(43,231,200,.12);color:var(--c-primary);white-space:nowrap;
}
.badge--accent{background:rgba(123,92,255,.16);color:#B4A4FF}
.badge--warn{background:rgba(255,138,61,.14);color:var(--c-warn)}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 28px}

/* Hero */
.hero{position:relative;overflow:hidden;padding:72px 0 96px}
.hero::before{
  content:"";position:absolute;top:-200px;right:-140px;width:680px;height:680px;
  background:radial-gradient(circle,rgba(43,231,200,.16),transparent 65%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:24px 24px;
  -webkit-mask-image:radial-gradient(circle at 72% 42%,#000 10%,transparent 68%);
  mask-image:radial-gradient(circle at 72% 42%,#000 10%,transparent 68%);
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:center}
.hero-copy{grid-column:span 6}
.hero-media{grid-column:span 6;margin:0}
.hero-copy p.lead{color:var(--t-sub);font-size:17px;max-width:560px;margin-top:20px}
.hero-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:16px;
  border:1px solid var(--line-strong);
  background:linear-gradient(140deg,#12121C,#1D1D2B 60%,#0B0B12);
  box-shadow:0 20px 50px rgba(0,0,0,.55);
}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px}

/* 痛点问答 */
.qa-list{display:grid;gap:16px}
.qa-item{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:24px;padding:24px;border:1px solid var(--line);
  border-radius:var(--r-card);background:var(--c-bg-2);
  transition:border-color .25s ease,transform .25s ease;
}
.qa-item:hover{border-color:var(--line-strong);transform:translateY(-2px)}
.qa-q{font-size:17px;font-weight:600;line-height:1.6}
.qa-q span{color:var(--c-warn);font-family:var(--mono);font-size:13px;margin-right:10px}
.qa-a{color:var(--t-sub);font-size:15px}

/* 方案卡片区 */
.solution-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.solution-card{
  position:relative;background:var(--c-card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.solution-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;z-index:2;
  background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent);
  opacity:0;transition:opacity .25s ease;
}
.solution-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--line-strong)}
.solution-card:hover::before{opacity:1}
.solution-card.wide{grid-column:span 2;flex-direction:row;align-items:stretch}
.solution-card.wide .solution-media{flex:0 0 46%;border-radius:0}
.solution-card.wide .solution-body{flex:1 1 auto;justify-content:center}
.solution-media{width:100%;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(140deg,#12121C,#1D1D2B)}
.solution-media img{width:100%;height:100%;object-fit:cover}
.solution-body{padding:24px;display:flex;flex-direction:column;gap:12px}
.solution-body h3{font-size:19px}
.solution-body p{color:var(--t-sub);font-size:14px;margin:0}
.solution-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--t-weak);margin-top:auto;padding-top:6px}

/* 数据条 */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  padding:32px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--c-bg-2);
}
.stat-num{font-family:var(--mono);font-size:34px;font-weight:700;color:var(--c-primary);line-height:1.2}
.stat-label{font-size:13px;color:var(--t-weak);margin-top:6px}
.stat-item+.stat-item{border-left:1px solid var(--line);padding-left:24px}

/* 咨询触发条 */
.cta-strip{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:28px 32px;border-radius:var(--r-card);
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(43,231,200,.12),rgba(123,92,255,.12));
  flex-wrap:wrap;
}
.cta-strip h3{margin-bottom:6px}
.cta-strip p{color:var(--t-sub);font-size:14px;margin:0}

/* 内容卡片 */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  position:relative;display:flex;flex-direction:column;
  background:var(--c-card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;z-index:2;
  background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent);
  opacity:0;transition:opacity .25s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--line-strong)}
.card:hover::before{opacity:1}
.card:hover .card-title{color:var(--c-primary)}
.card:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.card-cover{aspect-ratio:16/9;width:100%;object-fit:cover;background:linear-gradient(140deg,#12121C,#1D1D2B)}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto}
.card-title{
  font-size:19px;font-weight:600;line-height:1.5;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s ease;
}
.card-desc{
  color:var(--t-sub);font-size:14px;line-height:1.75;margin:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--t-weak);
}
.empty-state{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:56px 24px;border:1px dashed var(--line);border-radius:var(--r-card);
  background:var(--c-bg-2);text-align:center;color:var(--t-sub);
}
.empty-state svg{width:34px;height:34px;color:var(--c-primary);opacity:.8}
.skeleton{background:linear-gradient(90deg,#171723 25%,#1D1D2B 37%,#171723 63%);background-size:400% 100%;animation:shimmer 1.2s ease infinite}
@keyframes shimmer{0%{background-position:100% 50%}100%{background-position:0 50%}}

/* FAQ */
.faq-list{display:grid;gap:12px;max-width:960px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:var(--c-bg-2);overflow:hidden;transition:border-color .22s ease}
.faq-item.open{border-color:var(--line-strong)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:14px 20px;background:transparent;border:0;color:var(--t-main);
  font-size:16px;font-weight:600;text-align:left;line-height:1.6;
}
.faq-q:hover{color:var(--c-primary)}
.faq-icon{
  flex:0 0 auto;width:20px;height:20px;color:var(--c-primary);
  transition:transform .22s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-panel{max-height:0;overflow:hidden;transition:max-height .22s ease}
.faq-item.open .faq-panel{max-height:420px}
.faq-panel-inner{
  padding:0 20px 20px 18px;margin-left:20px;
  border-left:2px solid transparent;color:var(--t-sub);font-size:15px;
}
.faq-item.open .faq-panel-inner{border-left-color:var(--c-primary)}

/* CTA 通栏 */
.cta-band{
  position:relative;overflow:hidden;border-radius:20px;
  border:1px solid var(--line-strong);
  background:
    radial-gradient(circle at 85% 20%,rgba(123,92,255,.22),transparent 60%),
    radial-gradient(circle at 12% 85%,rgba(43,231,200,.18),transparent 62%),
    var(--c-bg-2);
  padding:56px 40px;text-align:center;
}
.cta-band h2{max-width:720px;margin:0 auto 16px}
.cta-band p{color:var(--t-sub);max-width:640px;margin:0 auto 28px;font-size:15px}
.cta-band .hero-cta{justify-content:center;margin:0}

/* 隐私与年龄提示 */
.privacy-note{
  display:flex;gap:10px;align-items:flex-start;
  font-size:13px;color:var(--t-weak);line-height:1.65;margin-top:24px;
}
.privacy-note svg{flex:0 0 auto;width:16px;height:16px;margin-top:3px;color:var(--c-primary)}
.age-bar{background:rgba(255,138,61,.07);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0}
.age-bar .container{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--t-weak);line-height:1.6}
.age-bar svg{flex:0 0 auto;width:16px;height:16px;color:var(--c-warn)}

/* 页脚 */
.site-footer{background:var(--c-bg-2);border-top:1px solid var(--line);padding-top:56px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;margin-bottom:14px}
.footer-brand svg{width:26px;height:26px}
.footer-desc{color:var(--t-sub);font-size:14px;max-width:320px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--t-main)}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--t-sub);font-size:14px}
.footer-col a:hover{color:var(--c-primary)}
.footer-contact{color:var(--t-sub);font-size:14px}
.footer-bottom{
  margin-top:40px;border-top:1px solid var(--line);padding:20px 0 28px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--t-weak);
}
.footer-social{display:flex;gap:12px}
.footer-social a{width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:10px;color:var(--t-sub)}
.footer-social a:hover{color:var(--c-primary);border-color:var(--line-strong)}

/* 移动抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,6,12,.72);
  opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;z-index:80;
}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:80vw;max-width:360px;z-index:90;
  background:var(--c-layer);border-left:1px solid var(--line-strong);
  padding:24px 20px;transform:translateX(100%);
  transition:transform .26s ease;overflow-y:auto;
}
body.drawer-open .drawer-mask{opacity:1;visibility:visible}
body.drawer-open .mobile-drawer{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-head strong{font-size:16px}
.drawer-close{
  width:44px;height:44px;border:1px solid var(--line);background:transparent;
  border-radius:10px;color:var(--t-sub);font-size:20px;line-height:1;
}
.drawer-close:hover{color:var(--c-primary);border-color:var(--line-strong)}
.drawer-nav a{
  display:flex;align-items:center;min-height:52px;font-size:16px;
  color:var(--t-sub);border-bottom:1px solid var(--line);
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--c-primary)}
.drawer-cta{margin-top:24px}

/* 弹层与表单 */
.modal-mask{
  position:fixed;inset:0;z-index:120;display:flex;align-items:center;justify-content:center;
  padding:20px;background:rgba(6,6,12,.72);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;
}
.modal-mask.open{opacity:1;visibility:visible}
.modal-panel{
  position:relative;width:100%;max-width:480px;max-height:90vh;overflow-y:auto;
  background:var(--c-layer);border:1px solid var(--line-strong);
  border-radius:var(--r-modal);box-shadow:var(--sh-modal);
  padding:28px;transform:scale(.96);transition:transform .22s ease;
}
.modal-mask.open .modal-panel{transform:scale(1)}
.modal-close{
  position:absolute;top:14px;right:14px;width:44px;height:44px;
  border:1px solid var(--line);background:transparent;border-radius:10px;
  color:var(--t-sub);font-size:20px;line-height:1;
}
.modal-close:hover{color:var(--c-primary);border-color:var(--line-strong)}
.modal-panel h3{margin-bottom:8px}
.modal-panel>p{color:var(--t-sub);font-size:14px;margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:var(--t-sub);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;min-height:46px;padding:11px 14px;background:#101018;
  border:1px solid rgba(255,255,255,.1);border-radius:var(--r-input);
  color:var(--t-main);transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{min-height:96px;resize:vertical;line-height:1.7}
.field select{
  appearance:none;-webkit-appearance:none;padding-right:38px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23A0A4B8' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;
}
.field input::placeholder,.field textarea::placeholder{color:#4E5266}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(43,231,200,.18);
}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--s-err)}
.field .err{display:block;font-size:13px;color:var(--s-err);margin-top:6px}
.check-row{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--t-weak);line-height:1.6}
.check-row input{width:16px;height:16px;min-height:0;margin-top:3px;accent-color:var(--c-primary)}
.form-actions{margin-top:20px}

@media (max-width:1279px){
  :root{--container:1080px}
  .section{padding:80px 0}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .hero{padding:56px 0 72px}
  .hero-copy{grid-column:span 12}
  .hero-media{grid-column:span 12}
  .solution-grid{grid-template-columns:1fr}
  .solution-card.wide{grid-column:span 1;flex-direction:column}
  .solution-card.wide .solution-media{flex:none}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);gap:20px}
  .stat-item+.stat-item{border-left:0;padding-left:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:980px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .nav-actions .btn-primary{display:none}
  .nav-actions{margin-left:auto}
}
@media (max-width:767px){
  body{padding-top:56px}
  .nav-inner{height:56px}
  .brand{font-size:15px}
  .brand svg{width:24px;height:24px}
  .section{padding:56px 0}
  .hero{padding:44px 0 56px}
  .qa-item{grid-template-columns:1fr;gap:12px}
  .post-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr;padding:24px}
  .cta-strip{padding:22px;flex-direction:column;align-items:flex-start}
  .cta-band{padding:40px 22px}
  .hero-cta .btn,.cta-band .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .card-body{padding:20px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  h1{font-size:26px}
  h2{font-size:22px}
  .solution-body,.card-body{padding:16px}
  .cta-band{padding:32px 16px}
  .stat-num{font-size:28px}
}

/* roulang page: article */
:root{
  --c-bg:#0B0B12;
  --c-bg2:#12121C;
  --c-card:#171723;
  --c-elev:#1D1D2B;
  --c-primary:#2BE7C8;
  --c-primary-d:#12B79E;
  --c-accent:#7B5CFF;
  --c-orange:#FF8A3D;
  --c-text:#E8EAF2;
  --c-text2:#A0A4B8;
  --c-text3:#6E7288;
  --c-ok:#3DDC84;
  --c-warn:#FFC24B;
  --c-err:#FF5C7A;
  --c-border:rgba(255,255,255,.07);
  --c-border-hi:rgba(43,231,200,.45);
  --r-card:16px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow-card:0 8px 24px rgba(0,0,0,.35);
  --shadow-hover:0 14px 34px rgba(43,231,200,.14);
  --shadow-modal:0 24px 60px rgba(0,0,0,.6);
  --w-container:1200px;
  --font-main:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-main);
  font-size:16px;
  line-height:1.85;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:24px 24px;
  z-index:0;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease}
ul,ol{list-style:none;margin:0;padding:0}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.01em}
p{margin:0}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--w-container);margin:0 auto;padding:0 24px;position:relative;z-index:1}
.mono{font-family:var(--font-mono)}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(11,11,18,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent);
  opacity:.75;
}
.site-header.scrolled{background:rgba(11,11,18,.96);box-shadow:0 1px 0 rgba(0,0,0,.6),0 10px 30px rgba(0,0,0,.35)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;white-space:nowrap;color:var(--c-text)}
.brand:hover{color:var(--c-primary)}
.brand svg{width:28px;height:28px;flex:none}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;
  display:inline-block;
  padding:10px 12px;
  font-size:15px;
  color:var(--c-text2);
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--c-primary);background:rgba(43,231,200,.05)}
.nav-link.active{color:#fff;text-shadow:0 0 12px rgba(43,231,200,.55)}
.nav-link.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:3px;height:2px;
  border-radius:2px;
  background:var(--c-primary);
}
.header-actions{display:flex;align-items:center;gap:12px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;
  border-radius:var(--r-btn);
  font-weight:600;font-size:15px;
  border:1px solid transparent;
  transition:transform .22s ease,background .22s ease,box-shadow .22s ease,filter .22s ease,color .22s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#06110F}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 10px 26px rgba(43,231,200,.28)}
.btn-primary:active{transform:none;background:var(--c-primary-d)}
.btn-ghost{background:transparent;border-color:var(--c-primary);color:var(--c-primary)}
.btn-ghost:hover{background:rgba(43,231,200,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:none}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-weight:600;font-size:15px}
.btn-text svg{transition:transform .22s ease}
.btn-text:hover svg{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  font-size:12px;line-height:1.5;
  border-radius:var(--r-pill);
  background:rgba(43,231,200,.12);
  color:var(--c-primary);
  border:1px solid rgba(43,231,200,.25);
  white-space:nowrap;
}
.badge-purple{background:rgba(123,92,255,.14);color:#C4B6FF;border-color:rgba(123,92,255,.32)}
.badge-orange{background:rgba(255,138,61,.13);color:var(--c-orange);border-color:rgba(255,138,61,.3)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;
  padding:44px 0 40px;
  overflow:hidden;
  border-bottom:1px solid var(--c-border);
}
.article-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-1.webp);
  background-size:cover;
  background-position:center;
  opacity:.3;
}
.article-hero::after{
  content:"";
  position:absolute;inset:0;
  background:radial-gradient(900px 420px at 12% 0%,rgba(43,231,200,.16),transparent 62%),linear-gradient(180deg,rgba(11,11,18,.6),rgba(11,11,18,.96));
}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;line-height:1.7;color:var(--c-text3);
}
.breadcrumb a{color:var(--c-text3)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:rgba(255,255,255,.22)}
.breadcrumb .current{color:var(--c-text2);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:22px;font-size:14px;color:var(--c-text2)}
.meta-row .dot{width:3px;height:3px;border-radius:50%;background:var(--c-text3)}
.article-title{
  margin-top:18px;
  max-width:900px;
  font-size:clamp(26px,4.4vw,46px);
  line-height:1.25;
  font-weight:700;
}
.article-lead{
  margin-top:16px;
  max-width:760px;
  font-size:15px;
  line-height:1.85;
  color:var(--c-text2);
}

/* ============ 正文布局 ============ */
.article-section{padding:56px 0 24px}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 240px;
  gap:48px;
  align-items:start;
}
.article-body{
  max-width:760px;
  font-size:17px;
  line-height:1.9;
  color:#D9DCE7;
}
.article-body>*:first-child{margin-top:0}
.article-body p{margin:0 0 1.1em}
.article-body h2{
  position:relative;
  margin:38px 0 16px;
  padding-left:16px;
  font-size:clamp(22px,2.6vw,28px);
  line-height:1.4;
  color:var(--c-text);
}
.article-body h2::before{
  content:"";
  position:absolute;left:0;top:.28em;bottom:.28em;width:3px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.article-body h3{margin:26px 0 12px;font-size:19px;line-height:1.5;color:var(--c-text)}
.article-body h4{margin:20px 0 10px;font-size:16px;line-height:1.5;color:var(--c-text2)}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:0}
.article-body ul li,.article-body ol li{position:relative;margin-bottom:.5em;padding-left:22px;line-height:1.9}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:.78em;width:6px;height:6px;border-radius:2px;
  background:var(--c-primary);opacity:.8;transform:rotate(45deg);
}
.article-body ol{counter-reset:num}
.article-body ol li{counter-increment:num}
.article-body ol li::before{
  content:counter(num,decimal-leading-zero);
  position:absolute;left:0;top:0;
  font-family:var(--font-mono);font-size:13px;color:var(--c-orange);font-weight:600;
}
.article-body blockquote{
  margin:24px 0;
  padding:20px 22px;
  border-left:3px solid var(--c-primary);
  background:rgba(43,231,200,.06);
  border-radius:0 12px 12px 0;
  color:var(--c-text2);
}
.article-body img{border-radius:12px;margin:24px 0 8px}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--c-text3);line-height:1.65}
.article-body a{color:var(--c-primary);border-bottom:1px dashed rgba(43,231,200,.5)}
.article-body a:hover{border-bottom-style:solid}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;
  font-size:15px;line-height:1.7;
  border-top:2px solid var(--c-primary);
  border-radius:0 0 12px 12px;
  overflow:hidden;
}
.article-body th,.article-body td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--c-border)}
.article-body thead th{background:var(--c-bg2);color:var(--c-text);font-weight:600;font-size:14px}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.03)}
.article-body hr{border:0;height:1px;background:var(--c-border);margin:32px 0}

/* 文章内的提示块 */
.article-body .note{
  padding:18px 20px;border-radius:12px;
  background:var(--c-bg2);border:1px solid var(--c-border);
  font-size:15px;color:var(--c-text2);
}

/* ============ 目录 ============ */
.toc{
  position:sticky;top:96px;
  padding:20px;
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
}
.toc h3{font-size:13px;letter-spacing:.12em;color:var(--c-text3);margin-bottom:12px;font-weight:600}
.toc-list a{
  display:block;
  padding:8px 0 8px 12px;
  font-size:14px;line-height:1.6;
  color:var(--c-text2);
  border-left:2px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.toc-list a:hover{color:var(--c-primary)}
.toc-list a.active{color:var(--c-primary);border-left-color:var(--c-primary)}
.toc-hint{margin-top:14px;font-size:12px;color:var(--c-text3);line-height:1.6}

/* ============ 空态 ============ */
.empty-state{
  padding:56px 32px;
  text-align:center;
  background:var(--c-card);
  border:1px dashed var(--c-border);
  border-radius:var(--r-card);
}
.empty-state svg{width:44px;height:44px;margin:0 auto 18px;color:var(--c-text3)}
.empty-state h3{font-size:19px;margin-bottom:10px}
.empty-state p{color:var(--c-text2);font-size:15px;margin-bottom:22px}

/* ============ 板块通用 ============ */
.section{padding:80px 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:36px}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;
  color:var(--c-primary);margin-bottom:12px;
}
.section-kicker::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--c-primary),transparent)}
.section-title{font-size:clamp(22px,2.6vw,32px);line-height:1.35}
.section-sub{margin-top:10px;font-size:15px;line-height:1.8;color:var(--c-text2);max-width:760px}

/* ============ 卡片 ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  position:relative;
  display:flex;flex-direction:column;
  padding:20px;
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-card);
  overflow:hidden;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.card::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent);
  opacity:0;transition:opacity .24s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--c-border-hi)}
.card:hover::before{opacity:1}
.card:hover .card-title{color:var(--c-primary)}
.card-cover{
  position:relative;
  aspect-ratio:16/9;
  border-radius:12px;
  overflow:hidden;
  background:linear-gradient(135deg,#151527,#1D1D2B);
  margin-bottom:16px;
}
.card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.card:hover .card-cover img{transform:scale(1.04)}
.card-title{font-size:19px;line-height:1.5;font-weight:600;margin:12px 0 8px;transition:color .2s ease;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-desc{font-size:14px;line-height:1.75;color:var(--c-text2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:16px;border-top:1px solid var(--c-border);
  font-size:13px;color:var(--c-text3);
}
.card-more{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:13px;font-weight:600}
.card-more svg{transition:transform .22s ease}
.card:hover .card-more svg{transform:translateX(4px)}

/* ============ CTA 通栏 ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  padding:48px;
  border-radius:20px;
  border:1px solid var(--c-border-hi);
  background:radial-gradient(600px 260px at 88% 12%,rgba(123,92,255,.22),transparent 66%),linear-gradient(120deg,rgba(43,231,200,.14),rgba(123,92,255,.12));
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);line-height:1.35;max-width:620px}
.cta-band p{margin-top:12px;font-size:15px;line-height:1.8;color:var(--c-text2);max-width:600px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ============ 18+ 提示 ============ */
.notice-band{
  border-top:1px solid var(--c-border);
  padding:18px 0;
  background:rgba(11,11,18,.6);
}
.notice-inner{
  display:flex;align-items:center;justify-content:center;gap:10px;
  font-size:13px;line-height:1.65;color:var(--c-text3);text-align:center;
}
.notice-inner svg{width:16px;height:16px;flex:none;color:var(--c-text3)}
.notice-inner strong{color:var(--c-text2);font-weight:600}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:72px;
  padding-top:72px;
  background:#0A0A10;
  border-top:1px solid var(--c-border);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;margin-bottom:14px}
.footer-brand svg{width:28px;height:28px;flex:none}
.footer-desc{font-size:14px;line-height:1.8;color:var(--c-text2);max-width:330px}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--c-text)}
.footer-col ul li{margin-bottom:10px}
.footer-col a{font-size:14px;color:var(--c-text2)}
.footer-col a:hover{color:var(--c-primary)}
.footer-contact{font-size:14px;line-height:1.8;color:var(--c-text2);margin-bottom:16px}
.footer-social{display:flex;gap:12px}
.footer-social a{
  width:38px;height:38px;display:grid;place-items:center;
  border:1px solid var(--c-border);border-radius:10px;color:var(--c-text2);
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.footer-social a:hover{color:var(--c-primary);border-color:var(--c-border-hi);transform:translateY(-2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:20px 0 28px;border-top:1px solid var(--c-border);
  font-size:13px;line-height:1.7;color:var(--c-text3);
}

/* ============ 移动抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;z-index:80;
  background:rgba(6,6,12,.72);
  opacity:0;visibility:hidden;
  transition:opacity .24s ease,visibility .24s ease;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;z-index:90;
  width:80vw;max-width:360px;height:100%;
  padding:24px;
  background:var(--c-bg2);
  border-left:1px solid var(--c-border);
  transform:translateX(100%);
  transition:transform .28s ease;
  overflow-y:auto;
}
.drawer.open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:15px;color:var(--c-text2)}
.drawer-close{width:44px;height:44px;display:grid;place-items:center;border-radius:10px;border:1px solid var(--c-border);color:var(--c-text2)}
.drawer-close:hover{color:var(--c-primary);border-color:var(--c-border-hi)}
.drawer .nav-link{display:block;line-height:52px;padding:0;border-bottom:1px solid var(--c-border);border-radius:0;font-size:16px}
.drawer .nav-link.active::after{display:none}
.drawer .nav-link.active{color:var(--c-primary)}
.drawer-cta{margin-top:22px}
.menu-toggle{
  display:none;
  width:44px;height:44px;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid var(--c-border);border-radius:10px;
}
.menu-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--c-primary)}

/* ============ 弹层 ============ */
.modal{position:fixed;inset:0;z-index:100;display:none}
.modal.open{display:block}
.modal-mask{position:absolute;inset:0;background:rgba(6,6,12,.72);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);animation:fadeIn .22s ease}
.modal-panel{
  position:relative;
  width:calc(100% - 40px);
  max-width:480px;
  margin:6vh auto;
  padding:28px;
  background:var(--c-elev);
  border:1px solid var(--c-border-hi);
  border-radius:18px;
  box-shadow:var(--shadow-modal);
  animation:popIn .22s ease;
  max-height:88vh;overflow-y:auto;
}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes popIn{from{opacity:0;transform:scale(.96)}to{opacity:1;transform:scale(1)}}
.modal-close{
  position:absolute;top:14px;right:14px;
  width:44px;height:44px;display:grid;place-items:center;
  border-radius:10px;border:1px solid var(--c-border);color:var(--c-text2);
}
.modal-close:hover{color:var(--c-primary);border-color:var(--c-border-hi)}
.modal h3{font-size:20px;margin-bottom:8px}
.modal-sub{font-size:14px;line-height:1.75;color:var(--c-text2);margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:var(--c-text2);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;
  background:#101018;
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r-btn);
  color:var(--c-text);
  padding:0 14px;
  height:46px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:104px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(43,231,200,.18);
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#6E7288 50%),linear-gradient(135deg,#6E7288 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 14px) 20px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.check-line{display:flex;align-items:flex-start;gap:10px;font-size:13px;line-height:1.7;color:var(--c-text3)}
.check-line input{width:16px;height:16px;margin-top:4px;accent-color:var(--c-primary);flex:none}
.privacy-note{display:flex;align-items:flex-start;gap:8px;margin-top:14px;font-size:13px;line-height:1.65;color:var(--c-text3)}
.privacy-note svg{width:15px;height:15px;flex:none;margin-top:3px}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .section{padding:72px 0}
  .article-layout{gap:36px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .menu-toggle{display:flex}
  .header-inner{justify-content:space-between}
  .brand{margin-right:auto}
  .section{padding:64px 0}
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .toc{display:none}
  .article-body{max-width:none}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .cta-band{padding:36px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .header-inner{height:56px}
  .brand{font-size:15px}
  .brand svg{width:24px;height:24px}
  .header-actions .btn-sm{display:none}
  .section{padding:56px 0}
  .section-head{margin-bottom:26px}
  .article-hero{padding:32px 0 30px}
  .article-section{padding:40px 0 12px}
  .article-body{font-size:16px}
  .grid-3{grid-template-columns:minmax(0,1fr)}
  .cta-band{padding:28px 22px;border-radius:16px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .breadcrumb .current{white-space:normal;max-width:100%}
}
@media (max-width:479px){
  .container{padding:0 16px}
  .article-body{font-size:15.5px}
  .card{padding:16px}
  .article-body table{font-size:13.5px}
  .article-body th,.article-body td{padding:10px 10px}
}

/* roulang page: category1 */
:root{
  --c-bg:#0B0B12;
  --c-bg-2:#12121C;
  --c-card:#171723;
  --c-layer:#1D1D2B;
  --c-primary:#2BE7C8;
  --c-primary-dark:#12B79E;
  --c-accent:#7B5CFF;
  --c-warn:#FF8A3D;
  --c-text:#E8EAF2;
  --c-text-2:#A0A4B8;
  --c-text-3:#6E7288;
  --c-on-primary:#06110F;
  --c-success:#3DDC84;
  --c-alert:#FFC24B;
  --c-error:#FF5C7A;
  --c-border:rgba(255,255,255,.07);
  --c-border-hi:rgba(43,231,200,.45);
  --r-card:16px;
  --r-btn:10px;
  --r-input:10px;
  --r-img:12px;
  --r-modal:18px;
  --sh-card:0 8px 24px rgba(0,0,0,.35);
  --sh-card-hover:0 14px 34px rgba(43,231,200,.14);
  --sh-modal:0 24px 60px rgba(0,0,0,.6);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SF Mono","Cascadia Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --sp-section:96px;
  --gutter:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
p{margin:0 0 1.1em;max-width:760px}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit}
::selection{background:rgba(43,231,200,.25);color:#fff}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 var(--gutter);
}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:80;
  background:rgba(11,11,18,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:background .25s ease, box-shadow .25s ease;
}
.site-header::after{
  content:"";
  position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent);
  opacity:.55;
}
.site-header.is-scrolled{
  background:rgba(11,11,18,.96);
  box-shadow:0 1px 0 rgba(255,255,255,.06),0 10px 30px rgba(0,0,0,.45);
}
.header-inner{
  height:68px;
  display:flex;
  align-items:center;
  gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand svg{width:30px;height:30px;flex-shrink:0}
.brand-text{
  font-size:17px;
  font-weight:700;
  letter-spacing:.01em;
  white-space:nowrap;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:4px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--c-text-2);
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--c-primary);background:rgba(43,231,200,.06)}
.nav-link.active{
  color:var(--c-primary);
  text-shadow:0 0 12px rgba(43,231,200,.55);
}
.nav-link.active::after{
  content:"";
  position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--c-primary);
  border-radius:2px;
  box-shadow:0 0 10px rgba(43,231,200,.7);
}
.header-cta{
  flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 18px;
  font-size:14px;font-weight:600;
  color:var(--c-on-primary);
  background:var(--c-primary);
  border:0;border-radius:var(--r-btn);
  box-shadow:0 6px 18px rgba(43,231,200,.25);
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease;
}
.header-cta:hover{background:#3ef0d1;transform:translateY(-1px);box-shadow:0 10px 24px rgba(43,231,200,.32)}
.burger{
  display:none;
  width:44px;height:44px;
  align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--c-border);
  border-radius:10px;
}
.burger span{
  display:block;width:18px;height:2px;background:var(--c-primary);border-radius:2px;
  position:relative;
}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-primary);border-radius:2px;
}
.burger span::before{top:-6px}
.burger span::after{top:6px}

.drawer-mask{
  position:fixed;inset:0;z-index:90;
  background:rgba(6,6,12,.72);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:95;
  width:80vw;max-width:360px;
  background:var(--c-bg-2);
  border-left:1px solid var(--c-border);
  transform:translateX(100%);
  transition:transform .28s cubic-bezier(.4,0,.2,1);
  padding:16px 0 24px;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{
  display:flex;align-items:center;justify-content:space-between;
  padding:6px 20px 16px;
  border-bottom:1px solid var(--c-border);
}
.drawer-head strong{font-size:15px;color:var(--c-text)}
.drawer-close{
  width:44px;height:44px;display:grid;place-items:center;
  background:transparent;border:1px solid var(--c-border);border-radius:10px;color:var(--c-text-2);
}
.drawer-nav{padding:8px 0}
.drawer-link{
  display:flex;align-items:center;
  height:52px;padding:0 20px;
  font-size:15px;color:var(--c-text-2);
  border-bottom:1px solid var(--c-border);
}
.drawer-link.active{color:var(--c-primary);text-shadow:0 0 12px rgba(43,231,200,.5)}
.drawer-foot{padding:20px}

/* ---------- 分类头图 ---------- */
.page-hero{
  position:relative;
  margin-top:68px;
  padding:96px 0 72px;
  overflow:hidden;
  background-image:linear-gradient(180deg,rgba(11,11,18,.62),rgba(11,11,18,.94)),url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--c-border);
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:24px 24px;
  opacity:.6;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:1}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--c-text-3);margin-bottom:22px;
}
.crumb a{color:var(--c-text-2);transition:color .2s ease}
.crumb a:hover{color:var(--c-primary)}
.crumb .sep{color:var(--c-text-3);opacity:.7}
.page-hero h1{
  font-size:clamp(26px,4.4vw,46px);
  line-height:1.25;
  max-width:860px;
  margin-bottom:18px;
}
.page-hero h1 em{font-style:normal;color:var(--c-primary)}
.hero-sub{
  font-size:16px;
  color:var(--c-text-2);
  max-width:660px;
  margin-bottom:26px;
}
.badge-row{display:flex;flex-wrap:wrap;gap:10px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;
  font-size:12px;line-height:1.6;
  color:var(--c-primary);
  background:rgba(43,231,200,.12);
  border-radius:999px;
}
.badge.violet{color:#B9A8FF;background:rgba(123,92,255,.16)}
.badge.amber{color:#FFB282;background:rgba(255,138,61,.14)}

/* ---------- 通用板块 ---------- */
.section{padding:var(--sp-section) 0;position:relative}
.section.alt{background:var(--c-bg-2);border-top:1px solid var(--c-border);border-bottom:1px solid var(--c-border)}
.section-head{max-width:760px;margin-bottom:44px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.12em;color:var(--c-primary);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:3px;height:14px;background:var(--c-primary);border-radius:2px;box-shadow:0 0 10px rgba(43,231,200,.8)}
.section-title{font-size:clamp(22px,2.6vw,32px);line-height:1.35;margin-bottom:14px}
.section-desc{color:var(--c-text-2);font-size:15px;max-width:700px;margin-bottom:0}

/* ---------- 左文右图 ---------- */
.split{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:48px;
  align-items:start;
}
.split-copy h3{font-size:19px;margin-bottom:14px}
.split-copy p{color:var(--c-text-2);font-size:15.5px}
.split-media{position:relative}
.split-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border:1px solid var(--c-border);
  box-shadow:var(--sh-card);
}
.split-media::after{
  content:"";
  position:absolute;inset:-1px;border-radius:var(--r-img);
  border:1px solid rgba(43,231,200,.28);pointer-events:none;
}
.media-note{
  margin-top:12px;
  font-size:13px;
  color:var(--c-text-3);
}
.check-list{margin-top:22px;display:grid;gap:12px}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:14px 16px;
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  font-size:15px;
  color:var(--c-text-2);
  transition:border-color .2s ease,transform .2s ease;
}
.check-list li:hover{border-color:var(--c-border-hi);transform:translateY(-2px)}
.check-list svg{flex-shrink:0;margin-top:5px;color:var(--c-primary)}

/* ---------- 步骤 ---------- */
.steps{display:grid;gap:16px;counter-reset:step}
.step-item{
  position:relative;
  display:grid;
  grid-template-columns:74px 1fr;
  gap:20px;
  padding:24px;
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.step-item::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent);
  opacity:0;transition:opacity .22s ease;
  border-radius:var(--r-card) var(--r-card) 0 0;
}
.step-item:hover{transform:translateY(-4px);box-shadow:var(--sh-card-hover);border-color:var(--c-border-hi)}
.step-item:hover::before{opacity:1}
.step-num{
  font-family:var(--font-mono);
  font-size:26px;
  font-weight:700;
  color:var(--c-warn);
  line-height:1.1;
  letter-spacing:.02em;
}
.step-body h3{font-size:17px;margin-bottom:8px}
.step-body p{margin:0;font-size:15px;color:var(--c-text-2);max-width:none}

/* ---------- 卡片 ---------- */
.card-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
}
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  overflow:hidden;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent);
  opacity:0;transition:opacity .22s ease;z-index:2;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-card-hover);border-color:var(--c-border-hi)}
.card:hover::before{opacity:1}
.card:hover .card-title{color:var(--c-primary)}
.card-cover{
  aspect-ratio:16/9;
  width:100%;
  object-fit:cover;
  border-radius:0;
}
.card-body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-title{font-size:19px;line-height:1.5;transition:color .2s ease}
.card-text{font-size:14px;color:var(--c-text-2);line-height:1.7;margin:0}
.card-meta{
  margin-top:auto;
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-text-3);
  padding-top:14px;
  border-top:1px solid var(--c-border);
}
.card-meta .arrow{color:var(--c-primary);transition:transform .2s ease}
.card:hover .card-meta .arrow{transform:translateX(4px)}
.card.wide{grid-column:span 2;flex-direction:row}
.card.wide .card-cover{width:46%;aspect-ratio:auto;height:100%;min-height:240px}
.card.wide .card-body{padding:28px}

/* ---------- 场景矩阵 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.scene{
  padding:22px;
  background:var(--c-layer);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  transition:border-color .2s ease,transform .2s ease;
}
.scene:hover{border-color:var(--c-border-hi);transform:translateY(-3px)}
.scene h4{font-size:16px;margin-bottom:8px;color:var(--c-text)}
.scene p{margin:0;font-size:14px;color:var(--c-text-2);max-width:none}
.scene .dot{width:8px;height:8px;border-radius:50%;background:var(--c-primary);display:block;margin-bottom:14px;box-shadow:0 0 12px rgba(43,231,200,.8)}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:900px}
.faq-item{
  background:var(--c-card);
  border:1px solid var(--c-border);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:border-color .2s ease;
}
.faq-item.open{border-color:var(--c-border-hi)}
.faq-q{
  width:100%;
  min-height:56px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:14px 22px;
  background:transparent;border:0;
  color:var(--c-text);
  font-size:16px;font-weight:600;text-align:left;line-height:1.6;
}
.faq-q:hover{color:var(--c-primary)}
.faq-icon{
  flex-shrink:0;width:22px;height:22px;position:relative;
  transition:transform .22s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;
}
.faq-icon::before{width:14px;height:2px;transform:translate(-50%,-50%)}
.faq-icon::after{width:2px;height:14px;transform:translate(-50%,-50%)}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .28s ease;
}
.faq-a-inner{
  padding:4px 22px 22px 22px;
  margin-left:22px;
  border-left:2px solid var(--c-primary);
  padding-left:18px;
  font-size:15px;color:var(--c-text-2);line-height:1.85;
}
.faq-a-inner p{margin:0;max-width:none}

/* ---------- 提示条 ---------- */
.hint-bar{
  display:flex;align-items:flex-start;gap:14px;
  padding:20px 22px;
  background:rgba(255,138,61,.07);
  border:1px solid rgba(255,138,61,.28);
  border-radius:var(--r-card);
  font-size:14px;
  color:#FFD2B5;
  margin-top:32px;
  max-width:900px;
}
.hint-bar svg{flex-shrink:0;margin-top:3px;color:var(--c-warn)}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  padding:64px 0;
  background:linear-gradient(135deg,rgba(43,231,200,.10),rgba(123,92,255,.12));
  border-top:1px solid var(--c-border);
  border-bottom:1px solid var(--c-border);
}
.cta-band::before{
  content:"";position:absolute;right:-120px;top:-140px;width:480px;height:480px;
  background:radial-gradient(circle,rgba(43,231,200,.20),transparent 68%);
  pointer-events:none;
}
.cta-inner{
  position:relative;z-index:1;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px}
.cta-inner p{margin:0;color:var(--c-text-2);font-size:15px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;
  font-size:15px;font-weight:600;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease;
  cursor:pointer;
}
.btn-primary{
  background:var(--c-primary);color:var(--c-on-primary);
  box-shadow:0 8px 22px rgba(43,231,200,.22);
}
.btn-primary:hover{background:#3ef0d1;transform:translateY(-2px);box-shadow:0 14px 30px rgba(43,231,200,.34)}
.btn-primary:active{background:var(--c-primary-dark);transform:translateY(0)}
.btn-ghost{
  background:transparent;color:var(--c-primary);border-color:var(--c-primary);
}
.btn-ghost:hover{background:rgba(43,231,200,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--c-primary);font-size:15px;font-weight:600;
}
.btn-text span{transition:transform .2s ease}
.btn-text:hover span{transform:translateX(4px)}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-bg-2);
  border-top:1px solid var(--c-border);
  padding:64px 0 0;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand svg{width:30px;height:30px;flex-shrink:0}
.footer-brand span{font-size:17px;font-weight:700}
.footer-desc{font-size:14px;color:var(--c-text-2);max-width:340px;margin:0}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--c-text)}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--c-text-2);transition:color .2s ease}
.footer-col a:hover{color:var(--c-primary)}
.footer-contact{font-size:14px;color:var(--c-text-2);margin:0 0 16px;max-width:320px}
.footer-social{display:flex;gap:12px}
.footer-social a{
  width:38px;height:38px;display:grid;place-items:center;
  border:1px solid var(--c-border);border-radius:10px;
  color:var(--c-text-2);transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.footer-social a:hover{color:var(--c-primary);border-color:var(--c-border-hi);background:rgba(43,231,200,.08)}
.age-note{
  display:flex;align-items:center;gap:10px;
  padding:14px 0;
  font-size:13px;
  line-height:1.65;
  color:var(--c-text-3);
  border-top:1px solid var(--c-border);
}
.age-note svg{flex-shrink:0;color:var(--c-text-3)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:18px 0 26px;
  border-top:1px solid var(--c-border);
  font-size:13px;
  color:var(--c-text-3);
}
.footer-bottom a{color:var(--c-text-3)}
.footer-bottom a:hover{color:var(--c-primary)}

/* ---------- 弹层 ---------- */
.modal-mask{
  position:fixed;inset:0;z-index:120;
  display:grid;place-items:center;
  padding:20px;
  background:rgba(6,6,12,.72);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  opacity:0;visibility:hidden;
  transition:opacity .22s ease,visibility .22s ease;
}
.modal-mask.open{opacity:1;visibility:visible}
.modal-panel{
  position:relative;
  width:100%;max-width:480px;
  max-height:88vh;overflow-y:auto;
  padding:28px;
  background:var(--c-layer);
  border:1px solid var(--c-border-hi);
  border-radius:var(--r-modal);
  box-shadow:var(--sh-modal);
  transform:scale(.96);opacity:0;
  transition:transform .22s ease,opacity .22s ease;
}
.modal-mask.open .modal-panel{transform:scale(1);opacity:1}
.modal-close{
  position:absolute;top:14px;right:14px;
  width:44px;height:44px;display:grid;place-items:center;
  background:transparent;border:1px solid var(--c-border);border-radius:10px;
  color:var(--c-text-2);transition:color .2s ease,border-color .2s ease;
}
.modal-close:hover{color:var(--c-primary);border-color:var(--c-border-hi)}
.modal-panel h3{font-size:20px;margin-bottom:8px}
.modal-panel .modal-sub{font-size:14px;color:var(--c-text-2);margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;color:var(--c-text-2);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;
  padding:0 14px;
  height:46px;
  background:#101018;
  border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r-input);
  color:var(--c-text);
  font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:104px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);
  box-shadow:0 0 0 3px rgba(43,231,200,.18);
}
.field input::placeholder,.field textarea::placeholder{color:var(--c-text-3)}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#6E7288 50%),linear-gradient(135deg,#6E7288 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 15px) 20px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.agree{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--c-text-2);line-height:1.7;margin:4px 0 20px}
.agree input{width:16px;height:16px;margin-top:4px;accent-color:var(--c-primary);flex-shrink:0}
.modal-privacy{display:flex;gap:8px;font-size:13px;color:var(--c-text-3);margin-top:16px;line-height:1.65}
.modal-privacy svg{flex-shrink:0;margin-top:3px}
.privacy-note{
  display:flex;gap:10px;
  padding:20px 0 0;
  font-size:13px;color:var(--c-text-3);line-height:1.7;
}
.privacy-note svg{flex-shrink:0;margin-top:3px}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--sp-section:80px}
}
@media (max-width:1023px){
  :root{--sp-section:72px}
  .nav-links{display:none}
  .header-cta{display:none}
  .burger{display:flex}
  .header-inner{height:60px;justify-content:space-between}
  .split{grid-template-columns:1fr;gap:32px}
  .scene-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .card.wide{grid-column:span 2;flex-direction:column}
  .card.wide .card-cover{width:100%;aspect-ratio:16/9;height:auto;min-height:0}
}
@media (max-width:767px){
  :root{--sp-section:56px;--gutter:16px}
  .page-hero{margin-top:60px;padding:64px 0 52px}
  .page-hero h1{font-size:26px}
  .section-head{margin-bottom:28px}
  .card-grid{grid-template-columns:1fr;gap:16px}
  .card.wide{grid-column:span 1}
  .card-body{padding:20px}
  .card.wide .card-body{padding:20px}
  .scene-grid{grid-template-columns:1fr}
  .step-item{grid-template-columns:56px 1fr;gap:14px;padding:20px}
  .step-num{font-size:22px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-q{padding:14px 18px;font-size:15px}
  .faq-a-inner{margin-left:16px;padding-left:14px}
}
@media (max-width:479px){
  body{font-size:15px}
  .brand-text{font-size:15px}
  .page-hero h1{font-size:23px}
  .section-title{font-size:21px}
  .card-body{padding:16px}
  .step-item{padding:16px}
  .hint-bar{padding:16px}
}

/* roulang page: category3 */
:root{
  --c-bg:#0B0B12;
  --c-bg-2:#12121C;
  --c-card:#171723;
  --c-float:#1D1D2B;
  --c-primary:#2BE7C8;
  --c-primary-deep:#12B79E;
  --c-secondary:#7B5CFF;
  --c-accent:#FF8A3D;
  --t-main:#E8EAF2;
  --t-sub:#A0A4B8;
  --t-weak:#6E7288;
  --t-inverse:#06110F;
  --st-ok:#3DDC84;
  --st-warn:#FFC24B;
  --st-error:#FF5C7A;
  --line:rgba(255,255,255,.07);
  --line-strong:rgba(43,231,200,.45);
  --r-card:16px;
  --r-btn:10px;
  --r-input:10px;
  --r-badge:999px;
  --r-img:12px;
  --r-float:18px;
  --sh-card:0 8px 24px rgba(0,0,0,.35);
  --sh-card-hover:0 14px 34px rgba(43,231,200,.14);
  --sh-float:0 24px 60px rgba(0,0,0,.6);
  --sp-section:96px;
  --font-base:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--t-main);
  font-family:var(--font-base);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--t-main);}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;}
h1{font-size:clamp(26px,4.4vw,46px);line-height:1.25;}
h2{font-size:clamp(22px,2.6vw,32px);}
h3{font-size:19px;font-weight:600;line-height:1.5;}
h4{font-size:16px;font-weight:600;line-height:1.5;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:rgba(43,231,200,.28);color:#fff;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,11,18,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,var(--c-primary) 45%,var(--c-secondary) 55%,transparent);
  opacity:.7;
}
.site-header.is-scrolled{background:rgba(11,11,18,.96);box-shadow:0 1px 0 rgba(0,0,0,.6),0 10px 30px rgba(0,0,0,.45);}
.nav-bar{display:flex;align-items:center;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand svg{width:32px;height:32px;flex-shrink:0;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;flex-wrap:nowrap;}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--t-sub);
  border-radius:8px;transition:color .2s ease,background .2s ease;white-space:nowrap;
}
.nav-link:hover{color:var(--c-primary);background:rgba(43,231,200,.06);}
.nav-link.active{color:var(--c-primary);text-shadow:0 0 12px rgba(43,231,200,.55);}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);box-shadow:0 0 10px rgba(43,231,200,.7);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;margin-left:8px;
  border-radius:var(--r-btn);background:var(--c-primary);color:var(--t-inverse);
  font-size:14px;font-weight:600;transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
  white-space:nowrap;
}
.nav-cta:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 10px 26px rgba(43,231,200,.3);}
.nav-cta:active{transform:translateY(0);background:var(--c-primary-deep);}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;border-radius:10px;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  border:1px solid var(--line);background:rgba(23,23,35,.7);
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--c-primary);border-radius:2px;transition:transform .22s ease,opacity .22s ease;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,6,12,.72);opacity:0;visibility:hidden;
  transition:opacity .22s ease,visibility .22s ease;z-index:70;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100vh;width:80vw;max-width:360px;
  background:var(--c-bg-2);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .26s ease;z-index:80;
  padding:20px 20px 40px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-close{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--line);color:var(--t-sub);font-size:20px;}
.drawer-close:hover{color:var(--c-primary);border-color:var(--line-strong);}
.drawer a.drawer-link{
  display:flex;align-items:center;height:52px;font-size:16px;color:var(--t-sub);
  border-bottom:1px solid var(--line);
}
.drawer a.drawer-link:hover,.drawer a.drawer-link.active{color:var(--c-primary);}

/* ---------- Buttons / Badges ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;transition:all .2s ease;white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:var(--t-inverse);}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 14px 30px rgba(43,231,200,.3);}
.btn-primary:active{transform:translateY(0);background:var(--c-primary-deep);}
.btn-ghost{background:transparent;color:var(--c-primary);border:1px solid var(--line-strong);}
.btn-ghost:hover{background:rgba(43,231,200,.08);}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:15px;font-weight:600;}
.btn-text svg{transition:transform .2s ease;}
.btn-text:hover svg{transform:translateX(4px);}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--r-badge);
  font-size:12px;line-height:1.6;background:rgba(43,231,200,.12);color:var(--c-primary);
}
.badge-purple{background:rgba(123,92,255,.16);color:#B9A8FF;}
.badge-orange{background:rgba(255,138,61,.14);color:var(--c-accent);}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- Section base ---------- */
.section{padding:var(--sp-section) 0;}
.section-tight{padding:64px 0;}
.section-alt{background:var(--c-bg-2);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);
  font-size:13px;letter-spacing:.14em;color:var(--c-primary);margin-bottom:14px;text-transform:uppercase;
}
.section-head .eyebrow::before{content:"";width:3px;height:14px;background:var(--c-primary);border-radius:2px;box-shadow:0 0 10px rgba(43,231,200,.8);}
.section-head h2{margin-bottom:14px;}
.section-head p{color:var(--t-sub);font-size:16px;max-width:760px;}

/* ---------- Category hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background-color:#0d0d15;
  background-image:linear-gradient(rgba(11,11,18,.62),rgba(11,11,18,.78)),url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  padding:84px 0 72px;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:24px 24px;
  mask-image:radial-gradient(circle at 78% 30%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 78% 30%,#000 0%,transparent 72%);
}
.cat-hero .container{position:relative;z-index:2;}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--t-weak);margin-bottom:22px;flex-wrap:wrap;}
.crumb a{color:var(--t-sub);}
.crumb a:hover{color:var(--c-primary);}
.crumb .sep{color:rgba(255,255,255,.2);}
.cat-hero h1{max-width:840px;margin-bottom:18px;}
.cat-hero h1 em{font-style:normal;color:var(--c-primary);}
.cat-hero .lead{max-width:700px;color:var(--t-sub);font-size:17px;}
.cat-hero .badge-row{margin-top:24px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px;}
.hero-meta{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;
  margin-top:44px;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--line);
}
.hero-meta div{background:rgba(18,18,28,.86);padding:20px 24px;}
.hero-meta strong{display:block;font-family:var(--font-mono);font-size:22px;color:var(--c-primary);letter-spacing:.02em;}
.hero-meta span{font-size:13px;color:var(--t-weak);}

/* ---------- Compare (dual column) ---------- */
.compare-wrap{border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;background:var(--c-card);box-shadow:var(--sh-card);}
.compare-bar{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);
  padding:16px 24px;background:var(--c-float);border-bottom:1px solid var(--line);
  font-size:13px;letter-spacing:.08em;color:var(--t-weak);font-family:var(--font-mono);
}
.compare-row{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);
  border-bottom:1px solid var(--line);transition:background .2s ease;
}
.compare-row:last-child{border-bottom:0;}
.compare-row:hover{background:rgba(43,231,200,.04);}
.compare-key{padding:24px;border-right:1px solid var(--line);}
.compare-key h3{font-size:18px;margin-bottom:8px;}
.compare-key .badge{margin-top:4px;}
.compare-val{padding:24px;color:var(--t-sub);font-size:15px;}
.compare-val strong{color:var(--t-main);font-weight:600;}
.compare-val ul{margin-top:12px;display:grid;gap:8px;}
.compare-val li{position:relative;padding-left:18px;font-size:14.5px;}
.compare-val li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:2px;background:var(--c-secondary);opacity:.85;}

/* ---------- Timeline ---------- */
.timeline{position:relative;margin-top:8px;}
.timeline::before{
  content:"";position:absolute;left:23px;top:12px;bottom:12px;width:2px;
  background:linear-gradient(180deg,var(--c-primary),rgba(123,92,255,.7),transparent);
}
.tl-item{position:relative;display:grid;grid-template-columns:48px minmax(0,1fr);gap:20px;padding-bottom:34px;}
.tl-item:last-child{padding-bottom:0;}
.tl-node{
  width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--c-bg-2);border:1px solid var(--line-strong);
  font-family:var(--font-mono);font-size:15px;color:var(--c-primary);font-weight:600;
  box-shadow:0 0 0 6px rgba(11,11,18,.9);position:relative;z-index:2;
}
.tl-body{background:var(--c-card);border:1px solid var(--line);border-radius:var(--r-card);padding:22px 24px;transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;}
.tl-item:hover .tl-body{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:var(--sh-card-hover);}
.tl-body h3{margin-bottom:10px;}
.tl-body p{color:var(--t-sub);font-size:15px;}
.tl-body .tagline{margin-top:12px;font-size:13px;color:var(--t-weak);font-family:var(--font-mono);}

/* ---------- Cards ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.card{
  position:relative;background:var(--c-card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-card);transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;opacity:0;
  background:linear-gradient(90deg,transparent,var(--c-primary) 45%,var(--c-secondary) 55%,transparent);
  transition:opacity .24s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--sh-card-hover);}
.card:hover::before{opacity:1;}
.card:hover h3{color:var(--c-primary);}
.card h3{margin-bottom:10px;transition:color .2s ease;}
.card p{color:var(--t-sub);font-size:14px;line-height:1.8;}
.card-cover{aspect-ratio:16/9;width:100%;object-fit:cover;border-radius:var(--r-img);margin-bottom:18px;background:linear-gradient(135deg,#1a1a28,#101018);}
.card-meta{display:flex;align-items:center;gap:12px;margin-top:18px;font-size:13px;color:var(--t-weak);}
.card-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--t-weak);opacity:.6;}
.stagger-b{transform:translateY(26px);}
.stagger-b:hover{transform:translateY(22px);}

/* ---------- Panel / notice ---------- */
.panel{
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--c-bg-2);
  padding:26px 28px;
}
.panel-note{border-left:3px solid var(--c-primary);background:rgba(43,231,200,.06);border-radius:0 var(--r-card) var(--r-card) 0;padding:20px 24px;color:var(--t-sub);font-size:15px;}
.panel-warn{border-left:3px solid var(--c-accent);background:rgba(255,138,61,.08);border-radius:0 var(--r-card) var(--r-card) 0;padding:20px 24px;color:var(--t-sub);font-size:15px;}
.panel-warn strong{color:var(--c-accent);}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--c-card);
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:var(--line-strong);box-shadow:var(--sh-card);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;padding:16px 24px;cursor:pointer;list-style:none;
  font-size:16px;font-weight:600;color:var(--t-main);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--c-primary);}
.faq-icon{
  position:relative;flex-shrink:0;width:22px;height:22px;border-radius:50%;
  border:1px solid var(--line-strong);transition:transform .22s ease,background .22s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);transform:translate(-50%,-50%);
}
.faq-icon::before{width:10px;height:2px;}
.faq-icon::after{width:2px;height:10px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:rgba(43,231,200,.14);}
.faq-body{padding:0 24px 22px;border-left:2px solid var(--c-primary);margin-left:24px;padding-left:22px;color:var(--t-sub);font-size:15px;line-height:1.85;}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border:1px solid var(--line);border-radius:20px;
  background:linear-gradient(120deg,rgba(43,231,200,.12),rgba(123,92,255,.12)),var(--c-bg-2);
  padding:48px;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:32px;align-items:center;
}
.cta-band::after{
  content:"";position:absolute;width:420px;height:420px;right:-120px;top:-180px;border-radius:50%;
  background:radial-gradient(circle,rgba(43,231,200,.22),transparent 68%);pointer-events:none;
}
.cta-band h2{margin-bottom:12px;}
.cta-band p{color:var(--t-sub);max-width:640px;}
.cta-actions{display:flex;flex-direction:column;gap:14px;position:relative;z-index:2;}

/* ---------- Consult strip ---------- */
.consult-strip{
  display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center;
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--c-float);
  padding:26px 28px;box-shadow:var(--sh-card);
}
.consult-strip h3{margin-bottom:8px;}
.consult-strip p{color:var(--t-sub);font-size:14px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-bg-2);border-top:1px solid var(--line);margin-top:0;}
.age-notice{
  display:flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 24px;font-size:13px;color:var(--t-weak);
  border-bottom:1px solid var(--line);background:rgba(255,255,255,.015);text-align:center;
}
.age-notice svg{flex-shrink:0;color:var(--c-primary);opacity:.8;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:40px;padding:64px 0 40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand svg{width:30px;height:30px;}
.footer-brand span{font-size:16px;font-weight:700;}
.footer-desc{color:var(--t-sub);font-size:14px;max-width:340px;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--t-main);}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{color:var(--t-sub);font-size:14px;transition:color .2s ease;}
.footer-col a:hover{color:var(--c-primary);}
.footer-contact{color:var(--t-sub);font-size:14px;}
.footer-social{display:flex;gap:12px;margin-top:16px;}
.footer-social a{
  width:38px;height:38px;display:flex;align-items:center;justify-content:center;
  border-radius:10px;border:1px solid var(--line);color:var(--t-sub);transition:all .2s ease;
}
.footer-social a:hover{color:var(--c-primary);border-color:var(--line-strong);background:rgba(43,231,200,.08);transform:translateY(-2px);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:22px 0 34px;border-top:1px solid var(--line);font-size:13px;color:var(--t-weak);
}
.footer-bottom .legal{display:flex;gap:18px;flex-wrap:wrap;}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  :root{--sp-section:78px;}
  .nav-link{padding:8px 10px;font-size:14px;}
  .brand-text{font-size:16px;}
}
@media (max-width:1080px){
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:flex;}
}
@media (max-width:1023px){
  :root{--sp-section:72px;}
  .hero-meta{grid-template-columns:1fr 1fr;}
  .cta-band{grid-template-columns:1fr;padding:36px;}
  .grid-2{grid-template-columns:1fr;}
  .stagger-b{transform:none;}
  .stagger-b:hover{transform:translateY(-4px);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  :root{--sp-section:56px;}
  .container{padding:0 18px;}
  .nav-bar{height:56px;}
  .cat-hero{padding:56px 0 48px;}
  .compare-bar{display:none;}
  .compare-row{grid-template-columns:1fr;}
  .compare-key{border-right:0;border-bottom:1px solid var(--line);padding:20px;}
  .compare-val{padding:20px;}
  .hero-meta{grid-template-columns:1fr;}
  .hero-actions .btn{width:100%;}
  .consult-strip{grid-template-columns:1fr;padding:22px;}
  .consult-strip .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .tl-item{grid-template-columns:40px minmax(0,1fr);gap:14px;}
  .tl-node{width:40px;height:40px;font-size:13px;}
  .timeline::before{left:19px;}
  .faq-body{margin-left:18px;padding-left:16px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:48px 0 32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:479px){
  body{font-size:15px;}
  .card{padding:16px;}
  .panel{padding:20px;}
  .cta-band{padding:26px 20px;}
  .badge{font-size:11.5px;}
}

/* roulang page: category2 */
:root{
  --c-bg:#0B0B12;
  --c-bg-2:#12121C;
  --c-card:#171723;
  --c-float:#1D1D2B;
  --c-primary:#2BE7C8;
  --c-primary-d:#12B79E;
  --c-accent:#7B5CFF;
  --c-orange:#FF8A3D;
  --t-1:#E8EAF2;
  --t-2:#A0A4B8;
  --t-3:#6E7288;
  --t-invert:#06110F;
  --c-success:#3DDC84;
  --c-warn:#FFC24B;
  --c-error:#FF5C7A;
  --line:rgba(255,255,255,.07);
  --line-strong:rgba(43,231,200,.45);
  --r-card:16px;
  --r-btn:10px;
  --r-input:10px;
  --r-pill:999px;
  --r-img:12px;
  --r-modal:18px;
  --sh-card:0 8px 24px rgba(0,0,0,.35);
  --sh-hover:0 14px 34px rgba(43,231,200,.14);
  --sh-modal:0 24px 60px rgba(0,0,0,.6);
  --w-container:1200px;
  --sp-section:96px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--t-1);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--t-1);}
h1{font-size:clamp(26px,4.4vw,46px);line-height:1.25;}
h2{font-size:clamp(22px,2.6vw,32px);line-height:1.35;}
h3{font-size:19px;line-height:1.5;font-weight:600;}
h4{font-size:16px;line-height:1.5;font-weight:600;}
p{margin:0 0 1.1em;max-width:760px;color:var(--t-2);}
p:last-child{margin-bottom:0;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:var(--w-container);margin:0 auto;padding:0 24px;}
.section{padding:var(--sp-section) 0;position:relative;}
.section-alt{background:var(--c-bg-2);}
.section-head{max-width:760px;margin-bottom:40px;}
.eyebrow{
  display:inline-block;font-size:13px;letter-spacing:.16em;color:var(--c-primary);
  font-family:var(--font-mono);text-transform:uppercase;margin-bottom:14px;
}
.section-title{position:relative;padding-left:16px;margin-bottom:16px;}
.section-title::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-accent));
}
.section-sub{font-size:15px;color:var(--t-2);max-width:700px;}
.neon-rule{
  height:1px;width:100%;
  background:linear-gradient(90deg,transparent,var(--c-primary) 45%,var(--c-accent) 55%,transparent);
  opacity:.5;
}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(11,11,18,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background .25s ease,box-shadow .25s ease;
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,var(--c-primary) 45%,var(--c-accent) 55%,transparent);
  opacity:.55;
}
.site-header.is-scrolled{background:rgba(11,11,18,.96);box-shadow:0 1px 0 rgba(0,0,0,.6);}
.nav-inner{display:flex;align-items:center;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand svg{width:30px;height:30px;flex-shrink:0;}
.brand-text{font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap;}
.brand-text span{color:var(--c-primary);}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-block;padding:8px 12px;font-size:15px;color:var(--t-2);
  border-radius:8px;transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--c-primary);background:rgba(43,231,200,.06);}
.nav-link.active{color:var(--c-primary);text-shadow:0 0 12px rgba(43,231,200,.55);}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;
  background:var(--c-primary);
}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--c-primary);border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:20px;height:2px;background:var(--c-primary);border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.drawer-mask{
  position:fixed;inset:0;background:rgba(6,6,12,.72);backdrop-filter:blur(4px);
  opacity:0;visibility:hidden;transition:opacity .25s ease;z-index:90;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:80vw;max-width:360px;background:var(--c-bg-2);
  border-left:1px solid var(--line);transform:translateX(100%);transition:transform .28s ease;z-index:95;
  padding:20px 0;display:flex;flex-direction:column;
}
.drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:0 20px 16px;border-bottom:1px solid var(--line);}
.drawer-close{width:44px;height:44px;border-radius:10px;border:1px solid var(--line);color:var(--t-2);font-size:20px;line-height:1;}
.drawer nav{display:flex;flex-direction:column;padding-top:8px;}
.drawer nav a{
  display:flex;align-items:center;height:52px;padding:0 20px;font-size:16px;color:var(--t-2);
  border-bottom:1px solid var(--line);
}
.drawer nav a.active{color:var(--c-primary);}
.drawer nav a:hover{background:rgba(43,231,200,.06);color:var(--c-primary);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:var(--t-invert);box-shadow:0 6px 20px rgba(43,231,200,.22);}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 12px 28px rgba(43,231,200,.3);}
.btn-primary:active{transform:translateY(0);background:var(--c-primary-d);}
.btn-ghost{border:1px solid var(--line-strong);color:var(--c-primary);background:transparent;}
.btn-ghost:hover{background:rgba(43,231,200,.08);transform:translateY(-2px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:15px;font-weight:600;}
.btn-text svg{transition:transform .2s ease;}
.btn-text:hover svg{transform:translateX(4px);}

/* ---------- Badges / tags ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;padding:4px 10px;border-radius:var(--r-pill);
  background:rgba(43,231,200,.12);color:var(--c-primary);line-height:1.6;
}
.badge-accent{background:rgba(123,92,255,.16);color:#B2A1FF;}
.badge-warn{background:rgba(255,138,61,.14);color:var(--c-orange);}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;}

/* ---------- Hero ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  opacity:.9;
}
.page-hero-bg::after{content:"";position:absolute;inset:0;background:rgba(8,8,14,.68);}
.page-hero .container{position:relative;z-index:2;}
.hero-inner{aspect-ratio:21/9;min-height:320px;display:flex;flex-direction:column;justify-content:center;padding:56px 0;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--t-3);margin-bottom:20px;}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{color:#3a3d4d;}
.breadcrumb .current{color:var(--t-2);}
.hero-title{max-width:900px;margin-bottom:16px;}
.hero-title em{font-style:normal;color:var(--c-primary);}
.hero-sub{font-size:17px;color:var(--t-2);max-width:640px;margin-bottom:0;}
.hero-meta{display:flex;flex-wrap:wrap;gap:20px;margin-top:28px;font-size:13px;color:var(--t-3);font-family:var(--font-mono);}

/* ---------- Brief cards ---------- */
.brief-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.brief{
  background:var(--c-card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-card);position:relative;overflow:hidden;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.brief::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;opacity:0;
  background:linear-gradient(90deg,transparent,var(--c-primary) 45%,var(--c-accent) 55%,transparent);
  transition:opacity .25s ease;
}
.brief:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--line-strong);}
.brief:hover::before{opacity:1;}
.brief-num{font-family:var(--font-mono);font-size:13px;color:var(--c-orange);letter-spacing:.08em;}
.brief h3{margin:12px 0 10px;font-size:18px;}
.brief p{font-size:14px;line-height:1.75;margin:0;}

/* ---------- Filter row ---------- */
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px;}
.filter-chip{
  padding:8px 16px;border-radius:var(--r-pill);font-size:14px;color:var(--t-2);
  border:1px solid var(--line);background:var(--c-bg-2);transition:all .2s ease;
}
.filter-chip:hover{color:var(--c-primary);border-color:var(--line-strong);}
.filter-chip.is-active{background:rgba(43,231,200,.12);border-color:var(--line-strong);color:var(--c-primary);}

/* ---------- News card wall ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  display:flex;flex-direction:column;background:var(--c-card);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-card);position:relative;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;opacity:0;z-index:3;
  background:linear-gradient(90deg,transparent,var(--c-primary) 45%,var(--c-accent) 55%,transparent);
  transition:opacity .25s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--line-strong);}
.card:hover::before{opacity:1;}
.card-cover{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,#151527,#101019);overflow:hidden;}
.card-cover img{width:100%;height:100%;object-fit:cover;}
.card-cover::after{
  content:"";position:absolute;inset:0;border:1px solid rgba(43,231,200,.25);border-radius:var(--r-img);
  pointer-events:none;opacity:.6;
}
.card-body{padding:24px;display:flex;flex-direction:column;flex:1;}
.card-body .badge{align-self:flex-start;margin-bottom:14px;}
.card-title{font-size:19px;line-height:1.5;font-weight:600;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card:hover .card-title{color:var(--c-primary);}
.card-excerpt{
  font-size:14px;line-height:1.75;color:var(--t-2);margin:0 0 18px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--t-3);
  font-family:var(--font-mono);
}
.card-foot .go{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-family:var(--font-sans);font-size:14px;font-weight:600;}
.card:hover .card-foot .go svg{transform:translateX(4px);}
.card-foot .go svg{transition:transform .2s ease;}

/* ---------- Duo compare ---------- */
.duo-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.panel{
  background:var(--c-card);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;
  box-shadow:var(--sh-card);
}
.panel-soft{background:var(--c-bg-2);}
.panel h3{margin-bottom:16px;}
.panel p{font-size:15px;}
.check-list li{
  display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);font-size:15px;color:var(--t-2);
}
.check-list li:last-child{border-bottom:0;}
.check-list .dot{
  flex-shrink:0;width:20px;height:20px;border-radius:50%;margin-top:4px;
  border:1px solid var(--line-strong);display:flex;align-items:center;justify-content:center;
  font-size:11px;color:var(--c-primary);font-family:var(--font-mono);
}
.step-list li{display:flex;gap:16px;padding:16px 0;border-bottom:1px solid var(--line);}
.step-list li:last-child{border-bottom:0;padding-bottom:0;}
.step-idx{font-family:var(--font-mono);font-size:15px;color:var(--c-orange);flex-shrink:0;letter-spacing:.06em;}
.step-list h4{margin-bottom:6px;}
.step-list p{font-size:14px;line-height:1.75;margin:0;}

/* ---------- Stats ---------- */
.stats-band{
  background:var(--c-bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.stat{padding:8px 0;}
.stat-num{
  font-family:var(--font-mono);font-size:clamp(26px,3vw,38px);color:var(--c-primary);
  line-height:1.1;letter-spacing:.02em;
}
.stat-num small{font-size:14px;color:var(--t-3);margin-left:6px;letter-spacing:0;}
.stat-label{margin-top:10px;font-size:13px;color:var(--t-3);}

/* ---------- FAQ ---------- */
.faq-list{max-width:880px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:16px 0;text-align:left;font-size:16px;font-weight:600;color:var(--t-1);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-primary);}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;color:var(--c-primary);
  font-size:16px;line-height:1;transition:transform .22s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease;}
.faq-a-inner{
  border-left:2px solid var(--c-primary);padding:4px 0 20px 18px;font-size:15px;line-height:1.85;color:var(--t-2);
}
.faq-a-inner p{font-size:15px;color:var(--t-2);margin:0;}

/* ---------- CTA band ---------- */
.cta-band{position:relative;overflow:hidden;border-radius:var(--r-card);border:1px solid var(--line);}
.cta-band-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
}
.cta-band-bg::after{content:"";position:absolute;inset:0;background:rgba(9,9,16,.76);}
.cta-inner{position:relative;z-index:2;padding:56px 40px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-inner h2{margin-bottom:12px;}
.cta-inner p{font-size:15px;margin:0;max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- Notice strip ---------- */
.notice-strip{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--c-bg-2);font-size:13px;color:var(--t-3);
}
.notice-strip .container{display:flex;gap:10px;align-items:center;padding-top:14px;padding-bottom:14px;}
.notice-strip svg{flex-shrink:0;color:var(--t-3);}

/* ---------- Footer ---------- */
.site-footer{background:var(--c-bg);border-top:1px solid var(--line);padding-top:64px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand svg{width:28px;height:28px;}
.footer-brand span{font-size:16px;font-weight:700;}
.footer-desc{font-size:14px;color:var(--t-3);max-width:320px;line-height:1.8;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--t-1);}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:var(--t-2);transition:color .2s ease;}
.footer-col ul a:hover{color:var(--c-primary);}
.footer-contact{font-size:14px;color:var(--t-3);line-height:1.8;max-width:300px;}
.footer-social{display:flex;gap:12px;margin-top:16px;}
.footer-social a{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--t-2);transition:all .2s ease;
}
.footer-social a:hover{color:var(--c-primary);border-color:var(--line-strong);background:rgba(43,231,200,.07);}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;font-size:13px;color:var(--t-3);
}
.footer-bottom .legal{display:flex;gap:16px;flex-wrap:wrap;}
.footer-bottom a:hover{color:var(--c-primary);}

/* ---------- Modal ---------- */
.modal-mask{
  position:fixed;inset:0;background:rgba(6,6,12,.72);backdrop-filter:blur(6px);
  display:flex;align-items:center;justify-content:center;padding:20px;z-index:120;
  opacity:0;visibility:hidden;transition:opacity .22s ease;
}
.modal-mask.is-open{opacity:1;visibility:visible;}
.modal-panel{
  position:relative;width:100%;max-width:480px;background:var(--c-float);border:1px solid var(--line-strong);
  border-radius:var(--r-modal);box-shadow:var(--sh-modal);padding:32px 28px;
  transform:scale(.96);opacity:0;transition:transform .22s ease,opacity .22s ease;
}
.modal-mask.is-open .modal-panel{transform:scale(1);opacity:1;}
.modal-close{
  position:absolute;top:8px;right:8px;width:44px;height:44px;border-radius:10px;color:var(--t-2);font-size:20px;
}
.modal-close:hover{color:var(--c-primary);background:rgba(43,231,200,.08);}
.modal-panel h3{margin-bottom:8px;}
.modal-panel > p{font-size:14px;margin-bottom:22px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:14px;color:var(--t-2);margin-bottom:8px;}
.field input,.field select,.field textarea{
  width:100%;background:#101018;border:1px solid rgba(255,255,255,.1);border-radius:var(--r-input);
  padding:0 14px;height:46px;font-size:15px;color:var(--t-1);transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:110px;padding:12px 14px;line-height:1.7;resize:vertical;}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--t-3) 50%),linear-gradient(135deg,var(--t-3) 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 14px) 20px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(43,231,200,.18);
}
.field.has-error input,.field.has-error textarea{border-color:var(--c-error);}
.field-error{display:none;font-size:13px;color:var(--c-error);margin-top:6px;}
.field.has-error .field-error{display:block;}
.check-line{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--t-3);margin-bottom:20px;}
.check-line input{width:16px;height:16px;margin-top:4px;accent-color:var(--c-primary);}
.privacy-note{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:var(--t-3);line-height:1.7;}
.privacy-note svg{flex-shrink:0;margin-top:3px;color:var(--t-3);}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  :root{--sp-section:72px;}
  .nav-links{gap:0;}
  .nav-link{padding:8px 9px;font-size:14px;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-toggle{display:flex;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .brief-grid{grid-template-columns:repeat(2,1fr);}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .hero-inner{aspect-ratio:auto;padding:48px 0 56px;}
}
@media (max-width:767px){
  :root{--sp-section:56px;}
  body{font-size:15px;}
  .container{padding:0 20px;}
  .news-grid,.brief-grid,.duo-grid{grid-template-columns:1fr;}
  .nav-actions .btn{display:none;}
  .card-body{padding:20px;}
  .panel{padding:22px;}
  .cta-inner{padding:36px 22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  h1{font-size:24px;}
  h2{font-size:20px;}
  .stats-grid{grid-template-columns:1fr 1fr;gap:20px;}
  .card-body{padding:16px;}
  .brief{padding:20px;}
  .modal-panel{padding:26px 18px;}
}

/* roulang page: category5 */
:root{
  --c-bg:#0B0B12;
  --c-bg-2:#12121C;
  --c-card:#171723;
  --c-float:#1D1D2B;
  --c-primary:#2BE7C8;
  --c-primary-d:#12B79E;
  --c-accent:#7B5CFF;
  --c-warn:#FF8A3D;
  --t-main:#E8EAF2;
  --t-sub:#A0A4B8;
  --t-weak:#6E7288;
  --t-inv:#06110F;
  --st-ok:#3DDC84;
  --st-alert:#FFC24B;
  --st-err:#FF5C7A;
  --line:rgba(255,255,255,.07);
  --line-hi:rgba(43,231,200,.45);
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --r-pop:18px;
  --sh-card:0 8px 24px rgba(0,0,0,.35);
  --sh-hover:0 14px 34px rgba(43,231,200,.14);
  --sh-pop:0 24px 60px rgba(0,0,0,.6);
  --sec:96px;
  --maxw:1200px;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"SF Mono",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--t-main);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.2px;}
h1{font-size:clamp(26px,4.4vw,46px);line-height:1.25;font-weight:700;}
h2{font-size:clamp(22px,2.6vw,32px);line-height:1.35;}
h3{font-size:19px;line-height:1.5;font-weight:600;}
h4{font-size:16px;line-height:1.5;font-weight:600;}
p{margin:0 0 1.1em;max-width:760px;color:var(--t-sub);}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:rgba(43,231,200,.28);color:#fff;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:4px;}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px;width:100%;}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--c-primary);color:var(--t-inv);padding:10px 16px;border-radius:0 0 10px 0;z-index:200;}
.skip-link:focus{left:0;}

/* 顶栏 */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(11,11,18,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background-color .25s ease,box-shadow .25s ease;
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-1px;
  height:1px;
  background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent);
  opacity:.75;
}
.site-header.scrolled{background:rgba(11,11,18,.96);box-shadow:0 1px 0 rgba(0,0,0,.6),0 10px 30px rgba(0,0,0,.35);}
.header-inner{display:flex;align-items:center;gap:28px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand svg{width:30px;height:30px;flex:0 0 auto;}
.brand-text{font-size:17px;font-weight:700;color:var(--t-main);white-space:nowrap;letter-spacing:.3px;}
.brand:hover .brand-text{color:var(--c-primary);}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{position:relative;font-size:15px;color:var(--t-sub);padding:6px 2px;}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link.active{color:var(--c-primary);text-shadow:0 0 12px rgba(43,231,200,.55);}
.nav-link.active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  background:rgba(255,255,255,.02);
  cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-primary);border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-primary);border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{background:var(--c-primary);color:var(--t-inv);}
.btn-primary:hover{background:#43efd2;transform:translateY(-2px);box-shadow:0 12px 28px rgba(43,231,200,.22);}
.btn-primary:active{background:var(--c-primary-d);transform:translateY(0);}
.btn-ghost{background:transparent;border-color:var(--line-hi);color:var(--c-primary);}
.btn-ghost:hover{background:rgba(43,231,200,.08);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.arrow-link{color:var(--c-primary);font-weight:600;font-size:15px;display:inline-flex;align-items:center;gap:6px;}
.arrow-link svg{transition:transform .2s ease;}
.arrow-link:hover svg{transform:translateX(4px);}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(6,6,12,.72);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:110;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;
  width:80vw;max-width:360px;
  background:var(--c-bg-2);
  border-left:1px solid var(--line);
  transform:translateX(102%);
  transition:transform .28s cubic-bezier(.22,.61,.36,1);
  z-index:120;display:flex;flex-direction:column;
  padding:20px 0;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:0 20px 16px;border-bottom:1px solid var(--line);}
.drawer-head span{font-size:16px;font-weight:700;}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:transparent;cursor:pointer;color:var(--t-sub);font-size:18px;line-height:1;}
.drawer-close:hover{color:var(--c-primary);border-color:var(--line-hi);}
.drawer-nav a{
  display:flex;align-items:center;height:52px;padding:0 20px;
  font-size:15px;color:var(--t-sub);border-bottom:1px solid var(--line);
}
.drawer-nav a:hover,.drawer-nav a.active{color:var(--c-primary);background:rgba(43,231,200,.05);}
.drawer-foot{padding:18px 20px 0;margin-top:auto;}

/* 分类头图 */
.page-hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  filter:saturate(.9);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(11,11,18,.62) 0%,rgba(11,11,18,.86) 100%),
    radial-gradient(60% 80% at 12% 20%,rgba(43,231,200,.20),transparent 62%),
    radial-gradient(50% 70% at 88% 10%,rgba(123,92,255,.18),transparent 60%);
}
.hero-grid-lines{
  position:absolute;inset:0;opacity:.05;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:24px 24px;
}
.page-hero .container{position:relative;z-index:2;padding-top:56px;padding-bottom:56px;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--t-weak);margin-bottom:20px;}
.breadcrumb a{color:var(--t-sub);}
.breadcrumb a:hover{color:var(--c-primary);}
.breadcrumb .sep{opacity:.6;}
.page-hero h1{max-width:900px;}
.hero-sub{margin-top:16px;font-size:17px;color:var(--t-sub);max-width:700px;line-height:1.8;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;padding:4px 10px;border-radius:999px;
  background:rgba(43,231,200,.12);color:var(--c-primary);
}
.tag.purple{background:rgba(123,92,255,.16);color:#b4a3ff;}
.tag.orange{background:rgba(255,138,61,.14);color:var(--c-warn);}
.hero-meta{margin-top:26px;font-size:13px;color:var(--t-weak);}

/* 板块 */
.section{padding:var(--sec) 0;}
.section.alt{background:var(--c-bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:800px;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.14em;color:var(--c-primary);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:28px;height:2px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent));border-radius:2px;}
.section-head h2{position:relative;padding-left:16px;}
.section-head h2::before{content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;border-radius:3px;background:var(--c-primary);box-shadow:0 0 14px rgba(43,231,200,.6);}
.section-head p{margin-top:16px;font-size:16px;}
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:44px;}

/* 数据条 */
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
}
.stat{background:var(--c-card);padding:28px 24px;transition:background-color .2s ease;}
.stat:hover{background:var(--c-float);}
.stat-num{font-family:var(--mono);font-size:36px;line-height:1;color:var(--c-primary);font-weight:600;letter-spacing:-.5px;}
.stat-num .unit{font-size:16px;margin-left:6px;color:var(--t-sub);font-family:var(--font);letter-spacing:0;}
.stat-label{margin-top:12px;font-size:13px;color:var(--t-weak);line-height:1.7;}
.stat-line{margin-top:16px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent));opacity:.6;}

/* 卡片 */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  position:relative;
  background:var(--c-card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh-card);
  display:flex;flex-direction:column;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.card::before{
  content:"";position:absolute;left:16px;right:16px;top:0;height:1px;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--c-primary) 45%,var(--c-accent) 55%,transparent);
  opacity:0;transition:opacity .24s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--line-hi);}
.card:hover::before{opacity:1;}
.card:hover h3{color:var(--c-primary);}
.card-cover{aspect-ratio:16/9;width:100%;object-fit:cover;border-radius:var(--r-img);margin-bottom:18px;background:linear-gradient(135deg,#141422,#1d1d2b);}
.card h3{margin-bottom:10px;transition:color .2s ease;}
.card p{font-size:14px;line-height:1.75;color:var(--t-sub);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:auto;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--t-weak);
}
.card-meta .arrow-link{font-size:14px;}

/* 非对称混排 */
.mix-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch;}
.mix-col{display:flex;flex-direction:column;gap:24px;}
.feature-card{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--c-card);box-shadow:var(--sh-card);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:var(--line-hi);}
.feature-card img{width:100%;aspect-ratio:21/9;object-fit:cover;border-radius:0;}
.feature-body{padding:26px;}
.feature-body h3{margin:12px 0 10px;transition:color .2s ease;}
.feature-card:hover .feature-body h3{color:var(--c-primary);}
.feature-body p{font-size:15px;line-height:1.8;}

/* 编号线索列表 */
.step-list{display:grid;gap:18px;}
.step-item{
  display:grid;grid-template-columns:64px 1fr;gap:18px;align-items:start;
  padding:22px;border:1px solid var(--line);border-radius:var(--r-card);background:var(--c-bg-2);
  transition:border-color .2s ease,background-color .2s ease;
}
.step-item:hover{border-color:var(--line-hi);background:var(--c-card);}
.step-num{font-family:var(--mono);font-size:22px;font-weight:600;color:var(--c-warn);letter-spacing:-.5px;}
.step-item h4{margin-bottom:8px;}
.step-item p{font-size:15px;line-height:1.8;}

/* 双栏说明 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start;}
.panel{
  background:var(--c-card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-card);
}
.panel.dashed{border-style:dashed;background:transparent;box-shadow:none;}
.panel h3{margin-bottom:14px;}
.panel p{font-size:15px;line-height:1.85;}
.check-list{display:grid;gap:12px;margin-top:4px;}
.check-list li{display:grid;grid-template-columns:22px 1fr;gap:10px;font-size:15px;color:var(--t-sub);line-height:1.8;}
.check-list li::before{
  content:"";width:8px;height:8px;margin-top:11px;border-radius:2px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-accent));
}
.panel.warn{border-color:rgba(255,138,61,.35);}
.panel.warn h3{color:var(--c-warn);}

/* 合作条 */
.coop-bar{
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  padding:30px 32px;border-radius:var(--r-card);
  border:1px solid var(--line-hi);
  background:linear-gradient(120deg,rgba(43,231,200,.09),rgba(123,92,255,.08) 70%,transparent);
}
.coop-bar h3{margin-bottom:8px;}
.coop-bar p{font-size:14px;line-height:1.75;margin-bottom:0;}

/* FAQ */
.faq-list{display:grid;gap:14px;max-width:920px;}
.faq-item{border:1px solid var(--line);border-radius:var(--r-card);background:var(--c-card);overflow:hidden;transition:border-color .2s ease;}
.faq-item.open{border-color:var(--line-hi);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  min-height:56px;padding:14px 22px;background:transparent;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--t-main);
}
.faq-q:hover{color:var(--c-primary);}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line-hi);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:15px;line-height:1;
  transition:transform .22s ease;
}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .28s ease;
  border-left:2px solid var(--c-primary);
  margin:0 22px 0 22px;
}
.faq-a-inner{padding:4px 0 20px 18px;font-size:15px;line-height:1.85;color:var(--t-sub);}
.faq-a-inner p{font-size:15px;}
.faq-item.open .faq-a{max-height:520px;}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid var(--line-hi);border-radius:20px;
  padding:56px 48px;
  background:
    radial-gradient(70% 120% at 8% 10%,rgba(43,231,200,.16),transparent 60%),
    radial-gradient(60% 120% at 92% 90%,rgba(123,92,255,.16),transparent 62%),
    var(--c-bg-2);
}
.cta-band h2{max-width:720px;}
.cta-band p{margin-top:16px;font-size:16px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}

/* 提示与隐私 */
.notice-bar{
  display:flex;align-items:flex-start;gap:12px;
  padding:16px 0;font-size:13px;line-height:1.65;color:var(--t-weak);
}
.notice-bar svg{flex:0 0 auto;margin-top:3px;color:var(--c-primary);opacity:.8;}
.age-note{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:var(--c-bg-2);
}
.age-note .container{display:flex;align-items:center;gap:12px;padding-top:16px;padding-bottom:16px;font-size:13px;color:var(--t-weak);}
.age-note svg{flex:0 0 auto;color:var(--c-primary);opacity:.85;}

/* 页脚 */
.site-footer{background:var(--c-bg-2);border-top:1px solid var(--line);padding-top:64px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand svg{width:28px;height:28px;}
.footer-brand span{font-size:16px;font-weight:700;}
.footer-desc{font-size:14px;color:var(--t-weak);line-height:1.8;max-width:320px;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--t-main);}
.footer-col ul{display:grid;gap:10px;}
.footer-col li a{font-size:14px;color:var(--t-sub);}
.footer-col li a:hover{color:var(--c-primary);}
.footer-contact{font-size:14px;color:var(--t-weak);line-height:1.8;margin-bottom:16px;max-width:300px;}
.footer-social{display:flex;gap:12px;}
.footer-social a{
  width:38px;height:38px;border:1px solid var(--line);border-radius:10px;
  display:flex;align-items:center;justify-content:center;color:var(--t-sub);
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.footer-social a:hover{color:var(--c-primary);border-color:var(--line-hi);transform:translateY(-2px);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--t-weak);
}
.footer-bottom a{color:var(--t-weak);}
.footer-bottom a:hover{color:var(--c-primary);}

/* 弹层 */
.modal-mask{
  position:fixed;inset:0;z-index:160;
  background:rgba(6,6,12,.72);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  display:flex;align-items:center;justify-content:center;padding:24px;
  opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;
}
.modal-mask.open{opacity:1;visibility:visible;}
.modal-panel{
  width:100%;max-width:480px;max-height:88vh;overflow-y:auto;
  background:var(--c-float);
  border:1px solid var(--line-hi);
  border-radius:var(--r-pop);
  box-shadow:var(--sh-pop);
  padding:28px;
  transform:scale(.96);opacity:0;
  transition:transform .22s ease,opacity .22s ease;
}
.modal-mask.open .modal-panel{transform:scale(1);opacity:1;}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:20px;}
.modal-head h3{margin-bottom:6px;}
.modal-head p{font-size:13px;color:var(--t-weak);margin:0;}
.modal-close{
  width:44px;height:44px;flex:0 0 auto;border:1px solid var(--line);border-radius:10px;
  background:transparent;color:var(--t-sub);cursor:pointer;font-size:18px;line-height:1;
}
.modal-close:hover{color:var(--c-primary);border-color:var(--line-hi);}
.field{margin-bottom:16px;}
.field label{display:block;font-size:14px;color:var(--t-sub);margin-bottom:8px;}
.field input,.field select,.field textarea{
  width:100%;background:#101018;border:1px solid rgba(255,255,255,.1);
  border-radius:var(--r-btn);padding:0 14px;height:46px;color:var(--t-main);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--t-sub) 50%),linear-gradient(135deg,var(--t-sub) 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 15px) 20px;background-size:5px 5px,5px 5px;background-repeat:no-repeat;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(43,231,200,.18);
}
.field .err-msg{display:none;font-size:13px;color:var(--st-err);margin-top:6px;}
.field.has-error input{border-color:var(--st-err);}
.field.has-error .err-msg{display:block;}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--t-weak);line-height:1.7;margin:4px 0 20px;}
.check-row input{width:16px;height:16px;height:16px;margin-top:4px;accent-color:var(--c-primary);flex:0 0 auto;}
.form-tip{display:flex;gap:8px;font-size:13px;color:var(--t-weak);line-height:1.7;margin-top:14px;}
.form-tip svg{flex:0 0 auto;margin-top:3px;color:var(--c-primary);opacity:.85;}

/* 响应式 */
@media (max-width:1279px){
  :root{--sec:72px;}
  .nav-links{gap:18px;}
  .footer-grid{grid-template-columns:1.3fr 1fr 1fr;gap:28px;}
  .footer-grid > div:last-child{grid-column:span 3;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-toggle{display:flex;}
  .header-actions .btn{display:none;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .mix-layout{grid-template-columns:1fr;}
  .split{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .page-hero .container{padding-top:44px;padding-bottom:44px;}
}
@media (max-width:767px){
  :root{--sec:56px;}
  .header-inner{height:56px;gap:16px;}
  .brand-text{font-size:15px;}
  .card-grid{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr;}
  .step-item{grid-template-columns:44px 1fr;padding:18px;gap:12px;}
  .step-num{font-size:18px;}
  .cta-band{padding:36px 24px;border-radius:16px;}
  .cta-actions .btn{width:100%;}
  .coop-bar{padding:24px;}
  .btn{width:100%;}
  .header-actions .btn-sm{width:auto;}
  .card{padding:20px;}
  .panel{padding:22px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-grid > div:last-child{grid-column:auto;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .faq-q{font-size:15px;padding:12px 18px;}
  .faq-a{margin:0 18px;}
}
@media (max-width:520px){
  h1{font-size:26px;}
  h2{font-size:22px;}
  body{font-size:15px;}
  .container{padding:0 18px;}
  .card{padding:16px;}
  .stat{padding:22px 18px;}
  .stat-num{font-size:30px;}
  .modal-panel{padding:20px;}
  .feature-body{padding:20px;}
}

/* roulang page: category4 */
:root{
  --c-bg:#0B0B12;
  --c-bg-2:#12121C;
  --c-card:#171723;
  --c-layer:#1D1D2B;
  --c-primary:#2BE7C8;
  --c-primary-d:#12B79E;
  --c-secondary:#7B5CFF;
  --c-accent:#FF8A3D;
  --c-text:#E8EAF2;
  --c-text-2:#A0A4B8;
  --c-muted:#6E7288;
  --c-on-primary:#06110F;
  --c-ok:#3DDC84;
  --c-warn:#FFC24B;
  --c-err:#FF5C7A;
  --line:rgba(255,255,255,.07);
  --line-hi:rgba(43,231,200,.45);
  --r-card:16px;
  --r-btn:10px;
  --r-input:10px;
  --r-pill:999px;
  --r-img:12px;
  --r-layer:18px;
  --shadow-card:0 8px 24px rgba(0,0,0,.35);
  --shadow-hover:0 14px 34px rgba(43,231,200,.14);
  --shadow-layer:0 24px 60px rgba(0,0,0,.6);
  --sp-section:96px;
  --container:1200px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"SF Mono","Cascadia Mono","Roboto Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.35}
h1{font-size:clamp(26px,4.4vw,46px);line-height:1.25}
h2{font-size:clamp(22px,2.6vw,32px)}
h3{font-size:19px;line-height:1.5}
h4{font-size:16px;line-height:1.5;font-weight:600}
p{margin:0 0 1.1em;max-width:760px}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
strong{font-weight:600;color:#fff}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
::selection{background:rgba(43,231,200,.28)}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--sp-section) 0}
.section-alt{background:var(--c-bg-2)}
.neon-line{height:1px;border:0;background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform .2s ease,background-color .2s ease,box-shadow .2s ease,filter .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:var(--c-on-primary)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 12px 28px rgba(43,231,200,.28)}
.btn-primary:active{transform:none;background:var(--c-primary-d);box-shadow:none}
.btn-ghost{background:transparent;border:1px solid var(--c-primary);color:var(--c-primary)}
.btn-ghost:hover{background:rgba(43,231,200,.08);transform:translateY(-2px)}
.btn-ghost:active{transform:none;background:rgba(43,231,200,.14)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:15px;font-weight:600}
.btn-text svg{transition:transform .2s ease}
.btn-text:hover svg{transform:translateX(4px)}
.is-disabled{opacity:.45;pointer-events:none}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-pill);
  font-size:12px;line-height:1.6;
  background:rgba(43,231,200,.12);color:var(--c-primary);
}
.badge-violet{background:rgba(123,92,255,.16);color:#B4A3FF}
.badge-warn{background:rgba(255,138,61,.14);color:var(--c-accent)}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(11,11,18,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:background-color .25s ease,box-shadow .25s ease;
}
.site-header::after{
  content:"";display:block;height:1px;
  background:linear-gradient(90deg,transparent,rgba(43,231,200,.55) 45%,rgba(123,92,255,.55) 55%,transparent);
}
.site-header.is-scrolled{background:rgba(11,11,18,.96);box-shadow:0 1px 0 rgba(255,255,255,.05),0 10px 30px rgba(0,0,0,.45)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand svg{width:30px;height:30px;flex:none}
.brand span{font-size:17px;font-weight:700;letter-spacing:.01em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;padding:9px 12px;border-radius:8px;
  font-size:15px;color:var(--c-text-2);
  transition:color .2s ease,background-color .2s ease;
}
.nav-link:hover{color:var(--c-primary);background:rgba(43,231,200,.06)}
.nav-link.active{color:var(--c-primary);text-shadow:0 0 12px rgba(43,231,200,.55)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:1px;height:2px;
  background:var(--c-primary);border-radius:2px;
}
.header-cta{flex:none}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  border:1px solid var(--line);
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--c-primary);border-radius:2px;transition:transform .22s ease,opacity .22s ease}
.nav-mask{
  position:fixed;inset:0;z-index:80;background:rgba(6,6,12,.72);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  opacity:0;visibility:hidden;transition:opacity .22s ease,visibility .22s ease;
}

/* 分类头图 */
.cat-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.cat-hero__bg{
  position:absolute;inset:0;
  background-image:linear-gradient(120deg,rgba(11,11,18,.94) 20%,rgba(11,11,18,.72) 60%,rgba(11,11,18,.9)),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.cat-hero__glow{
  position:absolute;width:520px;height:520px;right:-140px;top:-220px;border-radius:50%;
  background:radial-gradient(circle,rgba(43,231,200,.16),transparent 68%);
  pointer-events:none;
}
.cat-hero__inner{position:relative;padding:72px 24px 64px;max-width:900px}
.crumbs{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--c-muted);margin-bottom:22px;flex-wrap:wrap}
.crumbs a{color:var(--c-text-2);transition:color .2s ease}
.crumbs a:hover{color:var(--c-primary)}
.crumb-sep{color:var(--c-muted);opacity:.7}
.cat-hero h1{margin:16px 0 18px;max-width:820px}
.cat-hero__lead{font-size:16px;color:var(--c-text-2);max-width:680px;margin-bottom:30px}
.cat-hero__actions{display:flex;gap:14px;flex-wrap:wrap}

/* 板块标题 */
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2::before{
  content:"";display:block;width:48px;height:2px;border-radius:2px;margin-bottom:18px;
  background:linear-gradient(90deg,var(--c-primary),var(--c-secondary));
}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.1em;color:var(--c-primary);margin-bottom:12px;
}
.section-head > p{font-size:15px;color:var(--c-text-2);margin-top:14px}

/* 网格与卡片 */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
  position:relative;background:var(--c-card);border:1px solid var(--line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-card);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  overflow:hidden;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,#2BE7C8 45%,#7B5CFF 55%,transparent);
  opacity:0;transition:opacity .22s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--line-hi)}
.card:hover::before{opacity:1}
.card h3{font-size:19px;margin-bottom:10px;transition:color .22s ease}
.card:hover h3{color:var(--c-primary)}
.card p{font-size:14px;line-height:1.7;color:var(--c-text-2)}
.card__num{
  font-family:var(--font-mono);font-size:13px;color:var(--c-accent);
  letter-spacing:.1em;display:block;margin-bottom:12px;
}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}

/* FAQ 布局 */
.faq-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:32px;align-items:start}
.faq-group{margin-bottom:34px;scroll-margin-top:100px}
.faq-group__title{
  font-size:19px;margin-bottom:16px;padding-left:14px;position:relative;color:var(--c-text);
}
.faq-group__title::before{
  content:"";position:absolute;left:0;top:.45em;bottom:.45em;width:3px;border-radius:2px;
  background:linear-gradient(180deg,var(--c-primary),var(--c-secondary));
}
.faq-item{
  background:var(--c-card);border:1px solid var(--line);border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item:hover{border-color:rgba(43,231,200,.28)}
.faq-item[open]{border-color:var(--line-hi);box-shadow:var(--shadow-card)}
.faq-item summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;cursor:pointer;
  font-size:16px;font-weight:600;line-height:1.6;transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--c-primary)}
.faq-item[open] summary{color:var(--c-primary)}
.faq-mark{
  position:relative;width:18px;height:18px;flex:none;
  transition:transform .22s ease;
}
.faq-mark::before,.faq-mark::after{
  content:"";position:absolute;background:var(--c-primary);border-radius:2px;
}
.faq-mark::before{left:0;top:8px;width:18px;height:2px}
.faq-mark::after{top:0;left:8px;width:2px;height:18px}
.faq-item[open] .faq-mark{transform:rotate(45deg);opacity:.7}
.faq-body{padding:0 20px 22px}
.faq-body-inner{border-left:2px solid rgba(43,231,200,.45);padding-left:18px}
.faq-body-inner p{font-size:15px;line-height:1.85;color:var(--c-text-2);max-width:640px}
.faq-side{
  position:sticky;top:92px;
  background:var(--c-bg-2);border:1px solid var(--line);
  border-radius:var(--r-card);padding:18px 14px;
}
.faq-side__title{
  font-size:13px;letter-spacing:.1em;color:var(--c-muted);margin:0 0 12px;padding-left:10px;
}
.anchor-link{
  display:block;padding:10px 12px;border-radius:10px;font-size:14px;color:var(--c-text-2);
  border-left:2px solid transparent;transition:color .2s ease,background-color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.anchor-link:hover{color:var(--c-primary);background:rgba(43,231,200,.06)}
.anchor-link.active{color:var(--c-primary);background:rgba(43,231,200,.09);border-left-color:var(--c-primary)}
.faq-side__note{
  margin-top:14px;padding:12px;border-radius:10px;background:rgba(255,138,61,.08);
  font-size:13px;line-height:1.65;color:#FFC79B;
}

/* 图文分栏 */
.split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:48px;align-items:center}
.split__media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line)}
.split__media img{width:100%;height:100%;object-fit:cover;border-radius:0}
.split__media::after{
  content:"";position:absolute;inset:0;
  box-shadow:inset 0 0 0 1px rgba(43,231,200,.22);border-radius:var(--r-card);
  background:linear-gradient(180deg,transparent 55%,rgba(11,11,18,.55));
  pointer-events:none;
}

/* 步骤 */
.steps{margin-top:26px;display:grid;gap:16px}
.step{display:flex;gap:18px;align-items:flex-start}
.step__num{
  font-family:var(--font-mono);font-size:15px;font-weight:700;color:var(--c-accent);
  flex:none;width:38px;height:38px;border-radius:50%;
  border:1px solid rgba(255,138,61,.4);background:rgba(255,138,61,.08);
  display:flex;align-items:center;justify-content:center;
}
.step__body h4{margin-bottom:4px}
.step__body p{font-size:14px;line-height:1.75;color:var(--c-text-2);margin:0}

/* 提示条 */
.tips{display:grid;gap:14px;margin-top:10px}
.tip{
  display:flex;gap:14px;align-items:flex-start;
  padding:18px 20px;border-radius:var(--r-card);
  background:var(--c-card);border:1px solid var(--line);
  transition:border-color .22s ease,transform .22s ease;
}
.tip:hover{border-color:var(--line-hi);transform:translateY(-2px)}
.tip__icon{
  flex:none;width:34px;height:34px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(43,231,200,.1);color:var(--c-primary);
}
.tip__body h4{margin-bottom:4px}
.tip__body p{font-size:14px;line-height:1.75;color:var(--c-text-2);margin:0}

/* CTA 通栏 */
.cta-band{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  padding:48px;border-radius:24px;
  background:linear-gradient(135deg,rgba(43,231,200,.1),rgba(123,92,255,.12));
  border:1px solid var(--line-hi);
  box-shadow:var(--shadow-card);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:24px 24px;opacity:.6;pointer-events:none;
}
.cta-band > *{position:relative}
.cta-band h2{margin-bottom:12px}
.cta-band p{font-size:15px;color:var(--c-text-2);max-width:560px}
.cta-band__actions{display:flex;gap:14px;flex-wrap:wrap;flex:none}

/* 提示条 18+ */
.notice-band{border-top:1px solid var(--line);background:var(--c-bg)}
.notice-band__inner{
  display:flex;align-items:flex-start;gap:12px;
  padding:18px 24px;font-size:13px;line-height:1.65;color:var(--c-muted);
}
.notice-band__inner svg{flex:none;margin-top:2px;color:var(--c-primary);opacity:.75}

/* 页脚 */
.site-footer{background:var(--c-bg-2);border-top:1px solid var(--line)}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:32px;
  padding:64px 0 40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand svg{width:28px;height:28px;flex:none}
.footer-brand span{font-size:17px;font-weight:700}
.footer-desc{font-size:14px;line-height:1.75;color:var(--c-text-2);max-width:340px}
.footer-col h4{font-size:14px;letter-spacing:.06em;color:var(--c-text);margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--c-text-2);transition:color .2s ease}
.footer-col a:hover{color:var(--c-primary)}
.footer-contact{font-size:14px;line-height:1.75;color:var(--c-text-2);margin-bottom:16px;max-width:320px}
.footer-social{display:flex;gap:12px}
.footer-social a{
  width:38px;height:38px;border-radius:10px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--c-text-2);
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.footer-social a:hover{color:var(--c-primary);border-color:var(--line-hi);transform:translateY(-2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  padding:22px 0 30px;border-top:1px solid var(--line);
  font-size:13px;color:var(--c-muted);
}
.footer-bottom span{line-height:1.7}

/* 状态样式 */
.skeleton{
  border-radius:var(--r-card);
  background:linear-gradient(90deg,rgba(255,255,255,.04) 25%,rgba(255,255,255,.09) 37%,rgba(255,255,255,.04) 63%);
  background-size:400% 100%;
  animation:skeleton-shine 1.2s ease-in-out infinite;
}
@keyframes skeleton-shine{0%{background-position:100% 0}100%{background-position:0 0}}
.empty{
  display:flex;flex-direction:column;align-items:center;gap:12px;
  padding:48px 24px;text-align:center;border:1px dashed var(--line);border-radius:var(--r-card);
  color:var(--c-text-2);font-size:15px;
}
.empty svg{color:var(--c-muted)}

/* 响应式 */
@media (max-width:1279px){
  .cat-hero__inner{padding:64px 24px 56px}
}
@media (max-width:1023px){
  :root{--sp-section:72px}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr;gap:32px}
  .faq-layout{grid-template-columns:1fr;gap:20px}
  .faq-side{
    position:static;order:-1;display:flex;gap:8px;overflow-x:auto;
    padding:10px;border-radius:var(--r-pill);
  }
  .faq-side__title{display:none}
  .faq-side .anchor-link{
    border-left:0;border-bottom:2px solid transparent;border-radius:var(--r-pill);
    padding:8px 14px;background:rgba(255,255,255,.03);
  }
  .faq-side .anchor-link.active{border-bottom-color:var(--c-primary);background:rgba(43,231,200,.1)}
  .faq-side__note{display:none}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));padding:52px 0 34px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:36px}
}
@media (max-width:767px){
  :root{--sp-section:56px}
  .header-inner{height:56px;gap:12px}
  .brand span{font-size:15px}
  .nav-toggle{display:flex;margin-left:auto}
  .header-cta{display:none}
  .nav-links{
    position:fixed;top:0;right:0;z-index:90;
    height:100vh;width:80vw;max-width:360px;
    flex-direction:column;align-items:stretch;gap:0;
    margin:0;padding:84px 16px 24px;
    background:var(--c-bg-2);border-left:1px solid var(--line);
    transform:translateX(100%);transition:transform .26s ease;
    overflow-y:auto;
  }
  .nav-link{padding:0 12px;min-height:52px;display:flex;align-items:center;font-size:16px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-link.active::after{left:12px;right:auto;width:22px;bottom:0}
  body.nav-open .nav-links{transform:translateX(0)}
  body.nav-open{overflow:hidden}
  body.nav-open .nav-mask{opacity:1;visibility:visible}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .cat-hero__inner{padding:48px 24px 44px}
  .cat-hero__actions .btn{width:100%}
  .faq-item summary{font-size:15px;padding:12px 16px}
  .faq-body{padding:0 16px 18px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .card{padding:16px}
  .card h3{font-size:17px}
  h1{font-size:25px}
  h2{font-size:21px}
  .cta-band{padding:26px 20px;border-radius:18px}
  .cta-band__actions{width:100%}
  .cta-band__actions .btn{width:100%}
  .badge{font-size:11px}
  .notice-band__inner{padding:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}