/* roulang page: index */
:root{
  --ink-950:#05070F;
  --ink-900:#0A0F1E;
  --ink-850:#101733;
  --electric:#12D8FA;
  --electric-light:#6BF0FF;
  --violet:#7C5CFF;
  --ember:#FF7A3D;
  --text-1:#EAF2FF;
  --text-2:#A8B6D4;
  --text-3:#6F7E9E;
  --line:rgba(255,255,255,.08);
  --radius-card:16px;
  --radius-panel:24px;
  --radius-pill:999px;
  --shadow-glow:0 0 0 1px rgba(18,216,250,.18), 0 18px 60px -20px rgba(18,216,250,.35);
  --shadow-soft:0 12px 40px -18px rgba(0,0,0,.9);
  --gap:1rem;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text-2);
  font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei',sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;object-fit:cover;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease,opacity .2s ease;}
a:hover{color:var(--electric);}
button,input,textarea{font:inherit;color:inherit;}
button{background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;line-height:1.25;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
time{font-variant-numeric:tabular-nums;}
.num{font-variant-numeric:tabular-nums;}

.container{width:100%;max-width:1280px;margin:0 auto;padding-left:1rem;padding-right:1rem;}
@media (min-width:640px){ .container{padding-left:1.5rem;padding-right:1.5rem;} }
@media (min-width:1024px){ .container{padding-left:2rem;padding-right:2rem;} }

section[id]{scroll-margin-top:112px;}

/* ---------- 通用文本 ---------- */
.h1{
  font-size:clamp(2rem,5vw,3.5rem);
  line-height:1.15;
  letter-spacing:.02em;
  font-weight:700;
}
.h2{
  font-size:clamp(1.5rem,3vw,2.25rem);
  line-height:1.25;
  font-weight:700;
}
.h3{font-size:1.15rem;font-weight:600;line-height:1.4;}
.grad-text{
  background:linear-gradient(135deg,#12D8FA 0%,#7C5CFF 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.lead{font-size:1.05rem;color:var(--text-2);line-height:1.85;}
.muted{color:var(--text-3);font-size:.875rem;}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;
  font-size:.75rem;letter-spacing:.18em;color:var(--electric);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--electric),transparent);}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  border-radius:var(--radius-pill);
  font-size:.9375rem;font-weight:600;
  padding:.75rem 1.6rem;
  border:1px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,border-color .2s ease,filter .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#12D8FA 0%,#7C5CFF 100%);
  color:#05070F;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(18,216,250,.28),0 22px 66px -18px rgba(18,216,250,.5);color:#05070F;}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  background:rgba(255,255,255,0);
  border-color:rgba(255,255,255,.15);
  color:var(--text-1);
}
.btn-ghost:hover{border-color:rgba(18,216,250,.5);background:rgba(255,255,255,.05);color:var(--text-1);}
.btn-ghost:active{transform:scale(.98);}
.btn-sm{padding:.5rem 1.1rem;font-size:.8125rem;}
.btn-block{width:100%;}
.btn:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--electric);
  outline-offset:2px;
}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;filter:none;box-shadow:none;}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:.35rem;
  font-size:.75rem;line-height:1;
  padding:.375rem .7rem;
  border-radius:var(--radius-pill);
  background:rgba(124,92,255,.12);
  color:var(--electric-light);
  border:1px solid rgba(124,92,255,.25);
  letter-spacing:.02em;
}
.badge-ember{background:rgba(255,122,61,.12);color:#FFB28C;border-color:rgba(255,122,61,.32);}
.tag{
  display:inline-block;font-size:.75rem;letter-spacing:.06em;
  padding:.3rem .75rem;border-radius:var(--radius-pill);
  border:1px solid var(--line);color:var(--text-2);background:rgba(255,255,255,.03);
  transition:all .2s ease;
}
.tag:hover,.tag.is-on{border-color:rgba(18,216,250,.5);color:var(--electric-light);background:rgba(18,216,250,.08);}

/* ---------- 玻璃 ---------- */
.glass{
  background:rgba(255,255,255,.05);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.1);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12),0 20px 60px -30px rgba(0,0,0,.9);
}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,7,15,.82);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--line);
}
.brand-row{
  overflow:hidden;
  max-height:72px;
  transition:max-height .3s ease,opacity .3s ease;
}
.site-header.compact .brand-row{max-height:0;opacity:0;}
.brand-inner{
  height:72px;display:flex;align-items:center;justify-content:space-between;gap:1rem;
}
.logo{
  display:inline-flex;align-items:baseline;gap:.4rem;
  font-size:1.25rem;font-weight:700;color:var(--text-1);
  letter-spacing:.01em;
}
.logo .logo-main{
  background:linear-gradient(135deg,#12D8FA,#7C5CFF);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.logo .logo-sub{
  font-size:.72em;font-weight:500;letter-spacing:.24em;color:var(--text-3);
}
.brand-actions{display:flex;align-items:center;gap:1.25rem;}
.brand-actions .link-sub{font-size:.875rem;color:var(--text-2);}
.brand-actions .link-sub:hover{color:var(--electric);}

.channel-row{border-top:1px solid rgba(255,255,255,.05);}
.channel-inner{
  display:flex;align-items:center;gap:.5rem;
  height:48px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
}
.channel-inner::-webkit-scrollbar{display:none;}
.channel{
  position:relative;flex:0 0 auto;
  padding:.35rem .95rem;border-radius:var(--radius-pill);
  font-size:.875rem;color:var(--text-2);
  transition:all .2s ease;
}
.channel:hover{color:var(--text-1);background:rgba(255,255,255,.05);}
.channel.is-active{
  color:var(--text-1);
  background:rgba(18,216,250,.12);
  box-shadow:0 0 0 1px rgba(18,216,250,.25);
}
.channel.is-active::after{
  content:"";position:absolute;left:14%;right:14%;bottom:-9px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--electric),transparent);
  box-shadow:0 0 12px rgba(18,216,250,.9);
}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);color:var(--text-1);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:rgba(18,216,250,.5);color:var(--electric);}

.drawer{
  position:fixed;inset:0;z-index:80;
  background:rgba(5,7,15,.96);
  backdrop-filter:blur(16px);
  transform:translateY(-100%);
  transition:transform .32s ease;
  visibility:hidden;
}
.drawer.open{transform:translateY(0);visibility:visible;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:72px;}
.drawer-close{width:42px;height:42px;border-radius:12px;border:1px solid var(--line);color:var(--text-1);}
.drawer nav{display:flex;flex-direction:column;padding-top:1rem;}
.drawer nav a{
  font-size:1.375rem;font-weight:600;color:var(--text-1);
  padding:1rem 0;border-bottom:1px solid var(--line);
}
.drawer nav a.is-active{color:var(--electric);}
.drawer-foot{margin-top:2rem;}

/* ---------- Hero ---------- */
.hero{position:relative;padding:3.5rem 0 4rem;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent 82%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;top:-160px;left:-120px;width:560px;height:560px;
  background:radial-gradient(circle,rgba(18,216,250,.14),transparent 68%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;gap:2.5rem;grid-template-columns:1fr;}
.hero-panel{
  border-radius:var(--radius-panel);
  padding:1.75rem;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.75rem;}
.hero-stats{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1rem;margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--line);
}
.stat-num{
  display:block;font-size:1.75rem;font-weight:700;color:var(--ember);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.stat-label{font-size:.8125rem;color:var(--text-3);margin-top:.2rem;}
.hero-visual{position:relative;border-radius:var(--radius-panel);overflow:hidden;box-shadow:var(--shadow-glow);}
.hero-visual img{width:100%;height:100%;min-height:280px;aspect-ratio:7/5;}
.hero-float{
  position:absolute;left:1rem;right:1rem;bottom:1rem;
  border-radius:20px;padding:1rem 1.15rem;
}
.hero-float strong{display:block;color:var(--text-1);font-size:.9375rem;}
.hero-float span{font-size:.8125rem;color:var(--text-3);}

/* ---------- 板块 ---------- */
.section{padding:4rem 0;}
.section-alt{background:var(--ink-900);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:1rem;margin-bottom:2rem;}
.section-head p{max-width:44rem;}

/* ---------- 卖点拼图 ---------- */
.puzzle{display:grid;gap:1rem;grid-template-columns:1fr;}
.card{
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:1.5rem;
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.card:hover{
  transform:translateY(-2px);
  border-color:rgba(18,216,250,.4);
  box-shadow:0 18px 50px -26px rgba(18,216,250,.55);
}
.card:hover .card-title{color:var(--electric);}
.card-title{font-size:1.0625rem;font-weight:600;color:var(--text-1);transition:color .2s ease;}
.card-text{font-size:.9375rem;color:var(--text-2);margin-top:.5rem;}
.icon-box{
  width:40px;height:40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(124,92,255,.16);color:var(--electric-light);font-size:1rem;
  border:1px solid rgba(124,92,255,.28);
  margin-bottom:1rem;
}
.puzzle-wide{padding:2rem;display:flex;flex-direction:column;justify-content:space-between;}
.puzzle-wide .mini-list{display:grid;gap:.5rem;margin-top:1.25rem;}
.puzzle-wide .mini-list li{font-size:.9rem;color:var(--text-2);display:flex;gap:.5rem;align-items:flex-start;}
.puzzle-wide .mini-list i{color:var(--electric);margin-top:.45rem;font-size:.7rem;}

/* ---------- 演示 ---------- */
.demo-grid{display:grid;gap:2rem;grid-template-columns:1fr;}
.demo-frame{
  border-radius:var(--radius-panel);overflow:hidden;position:relative;
  box-shadow:var(--shadow-glow);background:var(--ink-850);
}
.demo-frame img{width:100%;aspect-ratio:16/9;}
.steps{position:relative;padding-left:1.75rem;}
.steps::before{content:"";position:absolute;left:11px;top:8px;bottom:8px;width:1px;background:linear-gradient(180deg,var(--electric),rgba(124,92,255,.35),transparent);}
.step{position:relative;padding-bottom:1.5rem;}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";position:absolute;left:-1.75rem;top:.5rem;width:23px;height:23px;border-radius:50%;
  background:var(--ink-950);border:1px solid rgba(18,216,250,.45);
}
.step::after{
  content:"";position:absolute;left:-1.25rem;top:.85rem;width:9px;height:9px;border-radius:50%;
  background:linear-gradient(135deg,var(--electric),var(--violet));
}

/* ---------- 证据 ---------- */
.proof-strip{
  display:grid;gap:1rem;grid-template-columns:repeat(2,minmax(0,1fr));
  padding:1.5rem;border-radius:var(--radius-panel);
  background:var(--ink-900);border:1px solid var(--line);
}
.proof-item{text-align:center;}
.proof-item .stat-num{font-size:1.625rem;}
.quote-bar{margin-top:1.25rem;border-radius:18px;padding:1rem 1.25rem;display:flex;gap:.85rem;align-items:center;}
.quote-bar i{color:var(--electric);}
.quote-bar p{font-size:.9rem;color:var(--text-2);}
.logo-row{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.25rem;}
.logo-chip{
  flex:1 1 120px;height:52px;border-radius:12px;
  background:linear-gradient(135deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-3);font-size:.8125rem;letter-spacing:.1em;
}

/* ---------- 最新信息 ---------- */
.news-wrap{display:grid;gap:1rem;grid-template-columns:1fr;}
.news-feature{
  background:var(--ink-900);border:1px solid var(--line);
  border-radius:var(--radius-panel);overflow:hidden;
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.news-feature:hover{transform:translateY(-2px);border-color:rgba(18,216,250,.4);box-shadow:0 22px 60px -28px rgba(18,216,250,.55);}
.news-feature img{width:100%;aspect-ratio:16/9;}
.news-feature .body{padding:1.5rem;}
.news-feature h3{font-size:1.3rem;margin:.85rem 0 .6rem;color:var(--text-1);}
.news-feature:hover h3{color:var(--electric);}
.news-mini{
  display:flex;gap:1rem;padding:1rem;
  background:var(--ink-900);border:1px solid var(--line);border-radius:var(--radius-card);
  transition:transform .2s ease-out,border-color .2s ease-out;
}
.news-mini:hover{transform:translateY(-2px);border-color:rgba(18,216,250,.4);}
.news-mini:hover h3{color:var(--electric);}
.news-mini img{width:104px;height:78px;border-radius:12px;flex:0 0 auto;}
.news-mini h3{font-size:.9375rem;font-weight:600;color:var(--text-1);margin:.35rem 0 .25rem;transition:color .2s ease;}
.news-mini p{font-size:.8125rem;color:var(--text-3);}
.line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-time{font-size:.75rem;color:var(--text-3);}
.empty-state{
  border:1px dashed rgba(18,216,250,.28);border-radius:var(--radius-panel);
  padding:3rem 1.5rem;text-align:center;background:rgba(18,216,250,.03);
}
.empty-state i{font-size:1.75rem;color:var(--electric);}
.empty-state p{margin:.85rem 0 1.25rem;color:var(--text-2);}

/* ---------- 价格 ---------- */
.price-grid{display:grid;gap:1.25rem;grid-template-columns:1fr;}
.price-card{
  background:var(--ink-900);border:1px solid var(--line);
  border-radius:var(--radius-panel);padding:1.75rem;
  display:flex;flex-direction:column;
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.price-card:hover{transform:translateY(-2px);border-color:rgba(18,216,250,.4);}
.price-card .price-num{
  font-size:2.5rem;font-weight:700;color:var(--text-1);
  font-variant-numeric:tabular-nums;line-height:1.1;
}
.price-card .price-cycle{font-size:.8125rem;color:var(--text-3);}
.price-list{margin:1.5rem 0;display:grid;gap:.65rem;}
.price-list li{display:flex;gap:.6rem;align-items:flex-start;font-size:.9rem;color:var(--text-2);}
.price-list i{color:var(--electric);font-size:.75rem;margin-top:.5rem;}
.price-card.featured{
  border-color:rgba(255,122,61,.5);
  box-shadow:0 0 0 1px rgba(255,122,61,.25),0 24px 70px -30px rgba(255,122,61,.55);
  position:relative;
}
.price-card.featured .price-num{color:var(--ember);}
.price-card.featured .ribbon{
  position:absolute;top:-13px;left:1.75rem;
  font-size:.75rem;padding:.28rem .8rem;border-radius:var(--radius-pill);
  background:linear-gradient(135deg,#FF7A3D,#FF9F6B);color:#200B02;font-weight:600;
}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;gap:2rem;grid-template-columns:1fr;}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:1.15rem .25rem;
  font-size:1rem;font-weight:600;color:var(--text-1);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary i{color:var(--electric);transition:transform .2s ease;font-size:.85rem;}
.faq-item[open] summary i{transform:rotate(45deg);}
.faq-item .answer{
  padding:0 1rem .1rem .25rem;
  border-left:2px solid var(--electric);
  margin-left:0;margin-right:0;margin-bottom:1.15rem;
  font-size:.9375rem;line-height:1.8;color:var(--text-2);
}

/* ---------- CTA + 表单 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--radius-panel);
  border:1px solid rgba(255,255,255,.1);
  background:
    radial-gradient(circle at 12% 8%,rgba(18,216,250,.16),transparent 55%),
    radial-gradient(circle at 88% 92%,rgba(124,92,255,.16),transparent 55%),
    var(--ink-850);
  padding:2rem;
}
.cta-grid{display:grid;gap:2rem;grid-template-columns:1fr;position:relative;}
.field{margin-bottom:1rem;}
.field label{display:block;font-size:.8125rem;color:var(--text-3);margin-bottom:.45rem;}
.field input,.field textarea{
  width:100%;border-radius:12px;
  background:rgba(5,7,15,.7);
  border:1px solid var(--line);
  padding:.8rem 1rem;font-size:.9375rem;color:var(--text-1);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field input::placeholder,.field textarea::placeholder{color:#5A6party;}
.field input::placeholder,.field textarea::placeholder{color:#5A6884;}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--electric);
  box-shadow:0 0 0 3px rgba(18,216,250,.18);
}
.field textarea{min-height:112px;resize:vertical;}
.form-note{font-size:.8125rem;color:var(--text-3);margin-top:.75rem;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:4rem;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(16,23,51,.6),rgba(5,7,15,.95));
}
.site-footer::before{
  content:"";position:absolute;top:-120px;left:50%;transform:translateX(-50%);
  width:640px;height:240px;background:radial-gradient(ellipse,rgba(18,216,250,.12),transparent 70%);
  pointer-events:none;
}
.footer-grid{display:grid;gap:2rem;grid-template-columns:1fr;padding:3rem 0 2rem;position:relative;}
.site-footer h4{font-size:.9375rem;color:var(--text-1);margin-bottom:1rem;}
.footer-links{display:grid;gap:.6rem;}
.footer-links a{font-size:.875rem;color:var(--text-2);}
.footer-links a:hover{color:var(--electric);}
.footer-brand p{font-size:.875rem;color:var(--text-3);margin-top:.85rem;max-width:26rem;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:1.25rem 0 1.75rem;
  display:flex;flex-wrap:wrap;gap:.75rem;justify-content:space-between;align-items:center;
  font-size:.8125rem;color:var(--text-3);
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:1.5rem;bottom:1.5rem;z-index:55;
  display:flex;align-items:center;gap:.6rem;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .28s ease,transform .28s ease;
}
.float-cta.show{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta .btn{box-shadow:var(--shadow-glow);}
.float-icon{
  width:46px;height:46px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(10,15,30,.9);color:var(--text-1);
  backdrop-filter:blur(12px);
}
.float-icon:hover{border-color:rgba(18,216,250,.55);color:var(--electric);}

@media (max-width:767px){
  .float-cta{
    left:1rem;right:1rem;bottom:1rem;justify-content:space-between;
    transform:translateY(16px);
  }
  .float-cta .btn{flex:1;}
  body{padding-bottom:84px;}
}

/* ---------- 响应式 ---------- */
@media (min-width:640px){
  .hero-stats{grid-template-columns:repeat(4,minmax(0,1fr));}
  .puzzle{grid-template-columns:repeat(2,minmax(0,1fr));}
  .proof-strip{grid-template-columns:repeat(4,minmax(0,1fr));}
  .price-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (min-width:1024px){
  .section{padding:6rem 0;}
  .hero{padding:5rem 0 5.5rem;}
  .hero-grid{grid-template-columns:5fr 7fr;align-items:center;gap:3rem;}
  .hero-panel{padding:2.25rem;}
  .puzzle{grid-template-columns:repeat(12,1fr);}
  .puzzle-wide{grid-column:span 7;}
  .puzzle-narrow{grid-column:span 5;}
  .demo-grid{grid-template-columns:7fr 5fr;align-items:center;}
  .news-wrap{grid-template-columns:7fr 5fr;}
  .price-grid{grid-template-columns:repeat(3,minmax(0,1fr));align-items:start;}
  .price-card.featured{transform:translateY(-16px);}
  .price-card.featured:hover{transform:translateY(-18px);}
  .faq-grid{grid-template-columns:4fr 8fr;gap:3rem;}
  .cta-grid{grid-template-columns:6fr 6fr;gap:3rem;align-items:start;}
  .cta-band{padding:3rem;}
  .footer-grid{grid-template-columns:2fr 1fr 1fr 1.2fr;gap:2.5rem;}
}
@media (max-width:1023px){
  .brand-actions .link-sub{display:none;}
  .channel-inner{height:46px;}
}
@media (max-width:639px){
  .nav-toggle{display:flex;}
  .brand-actions{display:none;}
  .news-mini{flex-direction:column;}
  .news-mini img{width:100%;height:auto;aspect-ratio:16/9;}
  .hero-float{position:static;margin-top:.75rem;border-radius:16px;}
}
@media (min-width:640px) and (max-width:1023px){
  .nav-toggle{display:flex;}
  .brand-actions{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}

/* roulang page: article */
:root{
  --ink-950:#05070F;
  --ink-900:#0A0F1E;
  --ink-850:#101733;
  --electric:#12D8FA;
  --electric-hi:#6BF0FF;
  --violet:#7C5CFF;
  --ember:#FF7A3D;
  --text:#EAF2FF;
  --text-2:#A8B6D4;
  --text-3:#6F7E9E;
  --line:rgba(255,255,255,.08);
  --panel:rgba(255,255,255,.05);
  --radius-sm:12px;
  --radius:16px;
  --radius-lg:24px;
  --shadow-glow:0 0 0 1px rgba(18,216,250,.18), 0 18px 60px -20px rgba(18,216,250,.35);
  --shadow-card:0 18px 48px -28px rgba(0,0,0,.9);
  --space-block:4rem;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text);
  font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:.01em;color:var(--text)}
h1{font-size:clamp(1.9rem,4.4vw,3rem);line-height:1.2;letter-spacing:.02em}
h2{font-size:clamp(1.5rem,3vw,2.25rem)}
h3{font-size:1.125rem}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
time,.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--electric);outline-offset:2px;border-radius:8px}

.container{width:100%;max-width:1280px;margin:0 auto;padding-left:1rem;padding-right:1rem}
@media (min-width:640px){.container{padding-left:1.5rem;padding-right:1.5rem}}
@media (min-width:1024px){.container{padding-left:2rem;padding-right:2rem}}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,7,15,.86);
  -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.brand-row{height:72px;display:flex;align-items:center;overflow:hidden;transition:height .25s ease,opacity .2s ease}
.site-header.is-compact .brand-row{height:0;opacity:0}
.brand-inner{display:flex;align-items:center;justify-content:space-between;width:100%;gap:1rem}
.logo{display:inline-flex;align-items:baseline;gap:.35rem;letter-spacing:.02em}
.logo-main{
  font-size:1.3rem;font-weight:700;
  background:linear-gradient(135deg,var(--electric),var(--violet));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.logo-sub{font-size:.72em;letter-spacing:.18em;color:var(--text-3);font-weight:500}
.brand-actions{display:flex;align-items:center;gap:1rem}
.link-sub{font-size:.9rem;color:var(--text-2)}
.link-sub:hover{color:var(--electric)}
.channel-row{border-top:1px solid var(--line);background:rgba(10,15,30,.6)}
.channel-inner{display:flex;align-items:center;gap:.3rem;height:48px;overflow-x:auto;scrollbar-width:none}
.channel-inner::-webkit-scrollbar{display:none}
.channel{
  position:relative;white-space:nowrap;padding:.4rem .9rem;border-radius:999px;
  font-size:.9rem;color:var(--text-2);
}
.channel:hover{color:var(--text);background:rgba(255,255,255,.05)}
.channel.is-active{
  color:var(--electric);
  background:rgba(18,216,250,.12);
  box-shadow:inset 0 -2px 0 var(--electric);
}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;
  border:1px solid var(--line);color:var(--text);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:rgba(18,216,250,.5);color:var(--electric)}
@media (max-width:1023px){.nav-toggle{display:inline-flex}}
@media (max-width:600px){.brand-actions .link-sub{display:none}}

/* ---------- 移动端抽屉 ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:90;display:none;flex-direction:column;
  padding:1.25rem;background:rgba(5,7,15,.97);
  -webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
  overflow-y:auto;
}
.mobile-drawer.is-open{display:flex}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem}
.drawer-close{width:42px;height:42px;border-radius:12px;border:1px solid var(--line);display:grid;place-items:center}
.drawer-links a{
  display:block;padding:1rem .25rem;font-size:1.3rem;font-weight:600;
  border-bottom:1px solid var(--line);
}
.drawer-links a:hover,.drawer-links a.is-active{color:var(--electric)}

/* ---------- 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.78rem 1.6rem;border-radius:999px;font-weight:600;font-size:.95rem;
  border:1px solid transparent;transition:all .2s ease;white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--electric),var(--violet));
  color:#05070F;box-shadow:var(--shadow-glow);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 0 1px rgba(18,216,250,.3),0 22px 66px -18px rgba(18,216,250,.45)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.15);color:var(--text)}
.btn-ghost:hover{border-color:rgba(18,216,250,.5);background:rgba(255,255,255,.05)}
.btn-ghost:active{transform:scale(.98)}
.btn-sm{padding:.5rem 1.15rem;font-size:.85rem}
.btn-block{width:100%}
.badge{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.25rem .7rem;border-radius:999px;font-size:.72rem;letter-spacing:.06em;
  background:rgba(124,92,255,.14);color:#BCACFF;border:1px solid rgba(124,92,255,.3);
}
.tag{
  display:inline-flex;align-items:center;padding:.35rem .85rem;border-radius:999px;
  font-size:.8rem;color:var(--text-2);background:rgba(255,255,255,.04);
  border:1px solid var(--line);
}
.tag:hover{color:var(--electric);border-color:rgba(18,216,250,.4)}

/* ---------- 文章头部 ---------- */
.page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:2.5rem 0 3rem}
.page-hero::before{
  content:'';position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.16;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.95),transparent 92%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.95),transparent 92%);
}
.page-hero::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(620px 320px at 18% 8%,rgba(18,216,250,.16),transparent 70%),
             radial-gradient(520px 300px at 88% 30%,rgba(124,92,255,.14),transparent 72%);
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:.45rem;font-size:.85rem;color:var(--text-3);margin-bottom:1.4rem}
.breadcrumb a:hover{color:var(--electric)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--text-2)}
.hero-title{max-width:56rem}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:.9rem;margin-top:1.4rem;font-size:.85rem;color:var(--text-3)}
.meta-item{display:inline-flex;align-items:center;gap:.4rem}
.meta-item i{color:rgba(18,216,250,.7)}

/* ---------- 正文 ---------- */
.section{padding-top:var(--space-block);padding-bottom:var(--space-block)}
.section-tight{padding-top:2.5rem;padding-bottom:2.5rem}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:1rem;margin-bottom:2rem}
.section-head p{color:var(--text-3);font-size:.9rem;max-width:34rem;margin-top:.5rem}

.article-shell{max-width:46rem;margin:0 auto}
.article-body{font-size:1.0625rem;line-height:1.92;color:var(--text-2)}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:1.1em 0}
.article-body h2{
  position:relative;margin:2.4rem 0 1rem;padding-left:1rem;
  font-size:clamp(1.3rem,2.6vw,1.7rem);color:var(--text);
}
.article-body h2::before{
  content:'';position:absolute;left:0;top:.2em;bottom:.2em;width:4px;border-radius:999px;
  background:linear-gradient(180deg,var(--electric),var(--violet));
}
.article-body h3{margin:1.9rem 0 .7rem;font-size:1.18rem;color:var(--text)}
.article-body h4{margin:1.5rem 0 .5rem;font-size:1.02rem;color:var(--text)}
.article-body a{color:var(--electric);text-decoration:underline;text-underline-offset:4px}
.article-body a:hover{color:var(--electric-hi)}
.article-body ul,.article-body ol{margin:1.1em 0;padding-left:1.5rem}
.article-body ul li{list-style:disc;margin:.42em 0}
.article-body ol li{list-style:decimal;margin:.42em 0}
.article-body li::marker{color:var(--electric)}
.article-body blockquote{
  margin:1.6em 0;padding:1rem 1.25rem;border-left:3px solid var(--electric);
  background:rgba(255,255,255,.04);border-radius:0 12px 12px 0;
}
.article-body blockquote p{margin:.3em 0}
.article-body img{border-radius:var(--radius);margin:1.6em 0;width:100%;height:auto}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:.85rem;color:var(--text-3);text-align:center;margin-top:.6rem}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.6em 0;font-size:.95rem;
  display:block;overflow-x:auto;white-space:nowrap;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:.65rem .85rem;text-align:left}
.article-body th{background:rgba(255,255,255,.04);color:var(--text)}
.article-body code{
  background:rgba(18,216,250,.1);color:#9EEBFF;padding:.12em .4em;
  border-radius:6px;font-size:.9em;
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.2rem 0}

.empty-state{
  text-align:center;padding:3.5rem 1.5rem;border-radius:var(--radius-lg);
  background:var(--ink-900);border:1px solid var(--line);
}
.empty-state i{font-size:2rem;color:rgba(18,216,250,.7)}
.empty-state h2{margin-top:1rem;font-size:1.35rem}
.empty-state p{margin:.75rem auto 1.75rem;max-width:26rem;color:var(--text-3);font-size:.95rem}

/* ---------- 玻璃条 / 标签行 ---------- */
.glass-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem;
  padding:1rem 1.25rem;border-radius:var(--radius);
  background:var(--panel);
  -webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
  border:1px solid rgba(255,255,255,.1);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
}
.glass-bar .bar-text{font-size:.92rem;color:var(--text-2)}
.glass-bar .bar-text strong{color:var(--text)}
.arrow-link{display:inline-flex;align-items:center;gap:.5rem;font-size:.92rem;font-weight:600;color:var(--electric)}
.arrow-link i{transition:transform .2s ease}
.arrow-link:hover i{transform:translateX(4px)}

.tag-row{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:1.75rem}

/* ---------- 相关推荐 ---------- */
.grid-cards{display:grid;grid-template-columns:1fr;gap:1.25rem}
@media (min-width:640px){.grid-cards{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.grid-cards{grid-template-columns:repeat(3,1fr);gap:1.5rem}}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--ink-900);border:1px solid var(--line);border-radius:var(--radius);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
  box-shadow:var(--shadow-card);
}
.card:hover{transform:translateY(-2px);border-color:rgba(18,216,250,.4);box-shadow:0 22px 56px -30px rgba(18,216,250,.5)}
.card-media{position:relative;overflow:hidden}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-media .badge{position:absolute;left:.85rem;top:.85rem}
.card-body{padding:1.2rem;display:flex;flex-direction:column;gap:.6rem;flex:1}
.card-body h3{font-size:1.05rem;line-height:1.5}
.card:hover .card-body h3{color:var(--electric)}
.card-body p{font-size:.9rem;color:var(--text-3);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:.82rem;color:var(--text-3);padding-top:.5rem}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  padding:2.5rem 1.5rem;background:var(--ink-850);border:1px solid var(--line);
}
.cta-band::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(560px 260px at 12% 0%,rgba(18,216,250,.18),transparent 70%),
             radial-gradient(420px 240px at 92% 100%,rgba(124,92,255,.16),transparent 72%);
}
.cta-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1.5rem}
.cta-inner h2{font-size:clamp(1.35rem,2.6vw,1.9rem)}
.cta-inner p{color:var(--text-2);font-size:.95rem;margin-top:.6rem;max-width:34rem}
.cta-actions{display:flex;flex-wrap:wrap;gap:.75rem}
@media (min-width:768px){.cta-band{padding:3rem 2.5rem}}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:1.5rem;bottom:1.5rem;z-index:70;
  display:flex;align-items:center;gap:.6rem;
  opacity:0;pointer-events:none;transform:translateY(14px);
  transition:opacity .28s ease,transform .28s ease;
}
.float-cta.is-visible{opacity:1;pointer-events:auto;transform:none}
.float-icon{
  width:50px;height:50px;border-radius:999px;display:grid;place-items:center;
  background:rgba(255,255,255,.06);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.16);color:var(--text);
}
.float-icon:hover{color:var(--electric);border-color:rgba(18,216,250,.5)}
@media (max-width:767px){
  .float-cta{
    left:0;right:0;bottom:0;gap:.6rem;justify-content:space-between;
    padding:.6rem .75rem;border-radius:0;
    background:rgba(5,7,15,.95);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    border-top:1px solid var(--line);
  }
  .float-cta .btn{flex:1}
  body{padding-bottom:78px}
}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;margin-top:3rem;padding-top:3rem;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,15,30,.7),rgba(5,7,15,1));
}
.site-footer::before{
  content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:min(620px,90%);height:1px;
  background:linear-gradient(90deg,transparent,rgba(18,216,250,.7),transparent);
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:2rem;padding-bottom:2.5rem}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:2.5rem}}
.footer-brand p{margin-top:.9rem;color:var(--text-3);font-size:.9rem;max-width:23rem;line-height:1.8}
.site-footer h4{font-size:.95rem;margin-bottom:1rem;color:var(--text)}
.footer-links{display:flex;flex-direction:column;gap:.65rem;font-size:.9rem}
.footer-links a{color:var(--text-2)}
.footer-links a:hover{color:var(--electric)}
.footer-links .muted{color:var(--text-3);font-size:.85rem}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:.6rem;justify-content:space-between;align-items:center;
  padding-top:1.25rem;padding-bottom:1.5rem;
  border-top:1px solid var(--line);font-size:.82rem;color:var(--text-3);
}
@media (max-width:520px){
  h1{font-size:1.75rem}
  .card-body{padding:1rem}
  .section{padding-top:3rem;padding-bottom:3rem}
}

/* roulang page: category1 */
:root{
  --ink-950:#05070F;
  --ink-900:#0A0F1E;
  --ink-850:#101733;
  --electric:#12D8FA;
  --electric-light:#6BF0FF;
  --violet:#7C5CFF;
  --ember:#FF7A3D;
  --text-main:#EAF2FF;
  --text-sub:#A8B6D4;
  --text-weak:#6F7E9E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.15);
  --radius-card:16px;
  --radius-panel:24px;
  --shadow-glow:0 0 0 1px rgba(18,216,250,.18), 0 18px 60px -20px rgba(18,216,250,.35);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:150px;-webkit-text-size-adjust:100%;}
html body{
  margin:0;
  background:var(--ink-950);
  color:var(--text-main);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(760px 440px at 10% -8%, rgba(18,216,250,.12), transparent 62%),
    radial-gradient(700px 420px at 94% 4%, rgba(124,92,255,.11), transparent 60%);
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease,opacity .2s ease,transform .2s ease;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,textarea{font:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
time{font-variant-numeric:tabular-nums;}
::selection{background:rgba(18,216,250,.3);color:#fff;}
:focus-visible{outline:2px solid var(--electric);outline-offset:3px;border-radius:8px;}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 16px;position:relative;z-index:1;}
@media (min-width:640px){.container{padding:0 24px;}}
@media (min-width:1024px){.container{padding:0 32px;}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(5,7,15,.76);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.brand-row{height:72px;display:flex;align-items:center;overflow:hidden;transition:height .28s ease,opacity .28s ease;}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;}
.logo{display:inline-flex;align-items:baseline;gap:.4rem;line-height:1.2;}
.logo-main{font-size:1.3rem;font-weight:700;letter-spacing:.02em;color:#FFFFFF;}
.logo-sub{font-size:.72em;font-weight:600;letter-spacing:.2em;color:var(--electric);}
.logo:hover .logo-main{color:var(--electric-light);}
.brand-actions{display:flex;align-items:center;gap:16px;}
.link-sub{font-size:14px;color:var(--text-sub);}
.link-sub:hover{color:var(--electric);}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line-strong);color:var(--text-main);
  align-items:center;justify-content:center;
}
.nav-toggle:hover{border-color:rgba(18,216,250,.5);background:rgba(255,255,255,.05);}
.site-header.is-scrolled .brand-row{height:0;opacity:0;pointer-events:none;}
.channel-row{border-top:1px solid var(--line);}
.channel-inner{display:flex;align-items:center;gap:6px;height:48px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.channel{
  position:relative;white-space:nowrap;font-size:14px;font-weight:500;
  color:var(--text-sub);padding:0 15px;height:34px;line-height:32px;
  border-radius:999px;border:1px solid transparent;flex:0 0 auto;
}
.channel:hover{color:#EAF2FF;background:rgba(255,255,255,.05);border-color:var(--line-strong);}
.channel.is-active{
  color:#04141C;font-weight:700;
  background:linear-gradient(135deg,#12D8FA 0%,#6BF0FF 100%);
  border-color:transparent;
  box-shadow:0 0 0 1px rgba(18,216,250,.4),0 12px 32px -16px rgba(18,216,250,.75);
}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:rgba(5,7,15,.96);}
.mobile-drawer.is-open{display:block;}
.mobile-drawer ul{padding:10px 16px 20px;}
.mobile-drawer li+li{border-top:1px solid var(--line);}
.mobile-drawer a{display:block;padding:14px 4px;font-size:16px;font-weight:600;color:var(--text-sub);}
.mobile-drawer a:hover,.mobile-drawer a.is-active{color:var(--electric);}
@media (max-width:900px){.link-sub{display:none;}}
@media (max-width:767px){
  .nav-toggle{display:inline-flex;}
  .brand-actions .btn{display:none;}
  .channel-row{display:none;}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;font-weight:600;font-size:15px;padding:12px 24px;
  border:1px solid transparent;white-space:nowrap;
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#12D8FA 0%,#7C5CFF 135%);
  color:#05070F;box-shadow:var(--shadow-glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(18,216,250,.34),0 22px 66px -18px rgba(18,216,250,.55);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text-main);}
.btn-ghost:hover{border-color:rgba(18,216,250,.5);background:rgba(255,255,255,.05);color:var(--electric-light);}
.btn-ghost:active{transform:scale(.98);}
.btn-sm{padding:9px 18px;font-size:14px;}

/* ============ 分类横幅 ============ */
.cat-banner{
  position:relative;min-height:266px;display:flex;align-items:flex-end;
  border-bottom:1px solid var(--line);overflow:hidden;
}
.cat-banner-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.34;z-index:0;}
.cat-banner-mask{
  position:absolute;inset:0;z-index:1;
  background:
    linear-gradient(90deg,rgba(5,7,15,.94) 0%,rgba(5,7,15,.72) 46%,rgba(10,15,30,.42) 100%),
    linear-gradient(180deg,rgba(5,7,15,.55) 0%,rgba(5,7,15,.15) 42%,rgba(5,7,15,.96) 100%);
}
.cat-banner::after{
  content:"";position:absolute;inset:0;z-index:2;opacity:.05;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.7) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.7) 1px,transparent 1px);
  background-size:64px 64px;
}
.cat-banner-inner{position:relative;z-index:3;padding-top:52px;padding-bottom:44px;width:100%;}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-weak);margin-bottom:16px;}
.breadcrumb a{color:var(--text-sub);}
.breadcrumb a:hover{color:var(--electric);}
.breadcrumb span.sep{color:rgba(255,255,255,.2);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;
  letter-spacing:.16em;color:var(--electric);text-transform:none;
  padding:6px 14px;border-radius:999px;border:1px solid rgba(18,216,250,.3);
  background:rgba(18,216,250,.08);margin-bottom:16px;
}
.cat-banner h1{
  font-size:clamp(2rem,5vw,3.1rem);line-height:1.15;font-weight:700;letter-spacing:.02em;
  background:linear-gradient(100deg,#EAF2FF 0%,#6BF0FF 52%,#7C5CFF 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.cat-banner-sub{margin-top:14px;font-size:clamp(1rem,1.6vw,1.125rem);color:var(--text-sub);max-width:640px;}
.cat-banner-meta{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-sub);
  padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.03);
}
.chip i{color:var(--electric);font-size:12px;}

/* ============ 主体布局 ============ */
.layout{display:grid;grid-template-columns:1fr;gap:36px;padding-top:56px;padding-bottom:72px;}
@media (min-width:1024px){
  .layout{grid-template-columns:252px minmax(0,1fr);gap:52px;padding-top:72px;padding-bottom:96px;}
}
.side-nav{display:none;}
@media (min-width:1024px){.side-nav{display:block;}}
.side-nav-card{
  position:sticky;top:132px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--line-strong);
  border-radius:var(--radius-panel);
  padding:20px 18px;
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
}
.side-nav-title{font-size:12px;letter-spacing:.16em;color:var(--text-weak);margin-bottom:14px;}
.side-nav-list a{
  display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:12px;
  font-size:14px;color:var(--text-sub);border-left:2px solid transparent;
}
.side-nav-list a:hover{background:rgba(255,255,255,.05);color:#EAF2FF;}
.side-nav-list a.is-active{color:var(--electric);background:rgba(18,216,250,.08);border-left-color:var(--electric);font-weight:600;}
.side-nav-foot{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);}
.side-nav-foot a{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--text-sub);}
.side-nav-foot a:hover{color:var(--electric);}

.content-flow{min-width:0;display:flex;flex-direction:column;gap:64px;}
.section-head{margin-bottom:26px;}
.section-head h2{
  font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.25;font-weight:700;color:#EAF2FF;
  padding-left:14px;border-left:3px solid var(--electric);
}
.section-head p{margin-top:12px;color:var(--text-sub);max-width:720px;}
.lead{font-size:1.0625rem;color:var(--text-sub);line-height:1.9;}
.lead strong{color:#EAF2FF;font-weight:600;}

/* 指标条 */
.metrics{
  display:grid;grid-template-columns:1fr;gap:14px;margin-top:28px;
}
@media (min-width:560px){.metrics{grid-template-columns:repeat(3,1fr);}}
.metric{
  background:var(--ink-900);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:20px;transition:border-color .2s ease,transform .2s ease;
}
.metric:hover{border-color:rgba(18,216,250,.4);transform:translateY(-2px);}
.metric b{display:block;font-size:1.75rem;font-weight:700;color:var(--ember);font-variant-numeric:tabular-nums;letter-spacing:.01em;}
.metric span{display:block;margin-top:6px;font-size:13px;color:var(--text-weak);}

/* 卡片网格 */
.card-grid{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:700px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
.card{
  display:flex;flex-direction:column;background:var(--ink-900);
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.card:hover{transform:translateY(-2px);border-color:rgba(18,216,250,.4);box-shadow:0 20px 54px -30px rgba(18,216,250,.5);}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--ink-850);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.card:hover .card-media img{transform:scale(1.04);}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,7,15,0) 40%,rgba(10,15,30,.7) 100%);}
.badge{
  position:absolute;left:12px;top:12px;z-index:2;
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  padding:4px 12px;border-radius:999px;
  background:rgba(124,92,255,.18);border:1px solid rgba(124,92,255,.4);color:#C9BCFF;
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:1.0625rem;font-weight:600;color:#EAF2FF;line-height:1.5;}
.card:hover .card-body h3{color:var(--electric-light);}
.card-body p{font-size:14px;color:var(--text-sub);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-foot{margin-top:auto;padding-top:8px;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.card-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--electric);}
.card-link i{transition:transform .2s ease;}
.card:hover .card-link i{transform:translateX(4px);}
.card-time{font-size:12px;color:var(--text-weak);}

/* 步骤 */
.steps{position:relative;padding-left:28px;}
.steps::before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,rgba(18,216,250,.7),rgba(124,92,255,.25));}
.step{position:relative;padding:0 0 30px 0;}
.step:last-child{padding-bottom:0;}
.step::before{
  content:"";position:absolute;left:-26px;top:7px;width:12px;height:12px;border-radius:50%;
  background:var(--ink-950);border:2px solid var(--electric);box-shadow:0 0 0 4px rgba(18,216,250,.12);
}
.step h3{display:flex;align-items:center;gap:10px;font-size:1.0625rem;font-weight:600;color:#EAF2FF;}
.step .step-no{
  font-size:12px;font-weight:700;color:var(--electric);font-variant-numeric:tabular-nums;
  padding:2px 9px;border-radius:999px;background:rgba(18,216,250,.1);border:1px solid rgba(18,216,250,.28);
}
.step p{margin-top:8px;font-size:14.5px;color:var(--text-sub);}

/* 要点清单 */
.check-list{display:grid;grid-template-columns:1fr;gap:12px;}
@media (min-width:700px){.check-list{grid-template-columns:repeat(2,minmax(0,1fr));}}
.check-item{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--ink-900);border:1px solid var(--line);border-radius:14px;padding:16px 18px;
  transition:border-color .2s ease,transform .2s ease;
}
.check-item:hover{border-color:rgba(18,216,250,.4);transform:translateY(-2px);}
.check-item i{color:var(--electric);margin-top:5px;font-size:14px;}
.check-item strong{display:block;font-size:15px;font-weight:600;color:#EAF2FF;}
.check-item span{display:block;margin-top:4px;font-size:13.5px;color:var(--text-sub);line-height:1.7;}

/* FAQ */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 4px;font-size:16px;font-weight:600;color:#EAF2FF;transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--electric-light);}
.faq-item summary .faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  border:1px solid var(--line-strong);color:var(--text-sub);font-size:12px;
  transition:transform .25s ease,border-color .25s ease,color .25s ease;
}
.faq-item[open] summary{color:var(--electric-light);}
.faq-item[open] summary .faq-icon{transform:rotate(45deg);border-color:rgba(18,216,250,.5);color:var(--electric);}
.faq-answer{padding:0 4px 20px 16px;border-left:2px solid var(--electric);margin-left:2px;font-size:15px;color:var(--text-sub);line-height:1.8;}

/* CTA 带 */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-panel);
  border:1px solid rgba(18,216,250,.24);
  background:
    radial-gradient(520px 300px at 12% 0%, rgba(18,216,250,.16), transparent 62%),
    radial-gradient(460px 280px at 92% 110%, rgba(124,92,255,.16), transparent 60%),
    linear-gradient(150deg,var(--ink-850),var(--ink-900));
  padding:38px 28px;
  box-shadow:var(--shadow-glow);
}
.cta-band::after{
  content:"";position:absolute;inset:0;opacity:.06;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.7) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.7) 1px,transparent 1px);
  background-size:56px 56px;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr;gap:26px;align-items:center;}
@media (min-width:900px){.cta-inner{grid-template-columns:1.35fr 1fr;gap:40px;}}
.cta-inner h2{font-size:clamp(1.4rem,2.6vw,1.9rem);line-height:1.3;font-weight:700;color:#EAF2FF;}
.cta-inner p{margin-top:12px;color:var(--text-sub);font-size:15px;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}
@media (min-width:900px){.cta-actions{justify-content:flex-end;}}

/* 页脚 */
.site-footer{margin-top:24px;border-top:1px solid var(--line);position:relative;background:linear-gradient(180deg,rgba(10,15,30,.6),rgba(5,7,15,1));}
.site-footer::before{
  content:"";position:absolute;left:50%;top:-1px;transform:translateX(-50%);
  width:60%;height:180px;pointer-events:none;
  background:radial-gradient(closest-side,rgba(18,216,250,.14),transparent 72%);
}
.footer-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1fr;gap:32px;padding-top:56px;padding-bottom:36px;
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}}
.footer-brand .logo{margin-bottom:14px;}
.footer-brand p{font-size:14px;color:var(--text-sub);max-width:340px;line-height:1.8;}
.footer-grid h4{font-size:14px;font-weight:700;color:#EAF2FF;margin-bottom:16px;letter-spacing:.04em;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:14px;color:var(--text-sub);}
.footer-links a:hover{color:var(--electric);}
.footer-links .muted{font-size:13px;}
.footer-bottom{
  position:relative;z-index:1;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  padding-top:20px;padding-bottom:28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-weak);
}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:28px;z-index:70;
  display:flex;align-items:center;gap:10px;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta .fab-main{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 22px;border-radius:999px;font-size:14px;font-weight:700;color:#05070F;
  background:linear-gradient(135deg,#12D8FA,#7C5CFF);
  box-shadow:0 0 0 1px rgba(18,216,250,.28),0 18px 50px -18px rgba(18,216,250,.7);
}
.float-cta .fab-main:hover{filter:brightness(1.08);transform:translateY(-2px);}
.float-cta .fab-icon{
  width:46px;height:46px;border-radius:50%;display:grid;place-items:center;
  background:rgba(255,255,255,.05);border:1px solid var(--line-strong);color:#EAF2FF;
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
}
.float-cta .fab-icon:hover{border-color:rgba(18,216,250,.55);color:var(--electric);}
@media (max-width:767px){
  .float-cta{
    left:0;right:0;bottom:0;gap:8px;padding:10px 12px;
    background:rgba(5,7,15,.92);border-top:1px solid var(--line);
    backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  }
  .float-cta .fab-main{flex:1;justify-content:center;}
  body{padding-bottom:76px;}
}
.anchored{display:block;position:relative;top:-140px;visibility:hidden;}

/* roulang page: category2 */
:root{
  --ink-950:#05070F;
  --ink-900:#0A0F1E;
  --ink-850:#101733;
  --electric:#12D8FA;
  --electric-hi:#6BF0FF;
  --violet:#7C5CFF;
  --ember:#FF7A3D;
  --text:#EAF2FF;
  --text-2:#A8B6D4;
  --text-3:#6F7E9E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --radius-sm:12px;
  --radius:16px;
  --radius-lg:24px;
  --glow:0 0 0 1px rgba(18,216,250,.18), 0 18px 60px -20px rgba(18,216,250,.35);
  --glow-hover:0 0 0 1px rgba(18,216,250,.32), 0 22px 70px -18px rgba(18,216,250,.45);
  --ease:200ms cubic-bezier(.4,0,.2,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:132px;}
html body{
  margin:0;
  padding:0;
  background:var(--ink-950);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:none;background:none;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--electric);outline-offset:3px;border-radius:6px;}

.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
}
@media (min-width:640px){.container{padding-left:24px;padding-right:24px;}}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px;}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:999px;
  font-weight:600;
  letter-spacing:.02em;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),border-color var(--ease),filter var(--ease);
  white-space:nowrap;
  padding:13px 26px;
  font-size:.95rem;
  border:1px solid transparent;
}
.btn-sm{padding:9px 18px;font-size:.875rem;}
.btn-primary{
  background:linear-gradient(135deg,var(--electric) 0%,var(--violet) 100%);
  color:#04121A;
  box-shadow:0 10px 32px -12px rgba(18,216,250,.75);
}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 14px 40px -12px rgba(18,216,250,.9);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  background:transparent;
  border-color:rgba(255,255,255,.15);
  color:var(--text);
}
.btn-ghost:hover{border-color:rgba(18,216,250,.5);background:rgba(255,255,255,.05);}
.btn-ghost:active{transform:scale(.98);}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:999px;
  font-size:12px;
  letter-spacing:.08em;
  background:rgba(124,92,255,.14);
  color:var(--electric-hi);
  border:1px solid rgba(124,92,255,.28);
}
.badge-ember{background:rgba(255,122,61,.14);color:var(--ember);border-color:rgba(255,122,61,.3);}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(5,7,15,.76);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.brand-row{
  border-bottom:1px solid var(--line);
  transition:height .3s ease,opacity .25s ease;
  overflow:hidden;
}
.brand-inner{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.site-header.is-scrolled .brand-row{height:0;opacity:0;border-bottom-color:transparent;}
.logo{display:inline-flex;align-items:baseline;gap:.36em;line-height:1.2;}
.logo-main{font-size:1.3rem;font-weight:700;color:var(--text);letter-spacing:.01em;}
.logo-sub{font-size:.72em;letter-spacing:.2em;color:var(--text-3);font-weight:500;}
.brand-actions{display:flex;align-items:center;gap:14px;}
.link-sub{font-size:.9rem;color:var(--text-2);transition:color var(--ease);}
.link-sub:hover{color:var(--electric-hi);}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:12px;
  border:1px solid var(--line-strong);
  color:var(--text);
  align-items:center;
  justify-content:center;
  transition:var(--ease);
}
.nav-toggle:hover{border-color:rgba(18,216,250,.5);color:var(--electric-hi);}

.channel-row{border-bottom:1px solid var(--line);}
.channel-inner{
  display:flex;
  align-items:center;
  gap:6px;
  height:52px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.channel-inner::-webkit-scrollbar{display:none;}
.channel{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:36px;
  padding:0 18px;
  border-radius:999px;
  font-size:.94rem;
  color:var(--text-2);
  white-space:nowrap;
  transition:color var(--ease),background var(--ease);
}
.channel:hover{color:var(--text);background:rgba(255,255,255,.06);}
.channel.is-active{
  color:var(--electric-hi);
  background:rgba(18,216,250,.12);
  font-weight:600;
}
.channel.is-active::after{
  content:"";
  position:absolute;left:20%;right:20%;bottom:-9px;height:2px;border-radius:2px;
  background:var(--electric);
  box-shadow:0 0 12px var(--electric);
}

/* 移动端抽屉 */
.nav-drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:rgba(5,7,15,.97);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  padding:24px 20px 40px;
  display:flex;
  flex-direction:column;
  gap:6px;
  transform:translateY(-12px);
  opacity:0;
  pointer-events:none;
  transition:opacity .24s ease,transform .24s ease;
}
.nav-drawer.is-open{opacity:1;transform:none;pointer-events:auto;}
.nav-drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.drawer-close{
  width:42px;height:42px;border-radius:12px;border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;color:var(--text);
}
.nav-drawer a{
  display:block;
  padding:15px 4px;
  font-size:1.16rem;
  font-weight:600;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.nav-drawer a.is-active{color:var(--electric-hi);}

/* ---------- 通用区块 ---------- */
.section{padding:64px 0;}
@media (min-width:768px){.section{padding:96px 0;}}
.section-head{max-width:720px;margin-bottom:36px;}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;color:var(--electric);
  text-transform:uppercase;margin-bottom:14px;
}
.section-eyebrow::before{content:"";width:22px;height:1px;background:var(--electric);display:block;}
h2{font-size:clamp(1.5rem,3vw,2.25rem);line-height:1.25;font-weight:700;color:var(--text);}
h3{font-size:1.15rem;line-height:1.45;font-weight:600;color:var(--text);}
.sec-desc{margin-top:14px;color:var(--text-2);font-size:.97rem;}

/* ---------- 分类页2：顶部大图卡 ---------- */
.c2-hero{padding:28px 0 0;}
@media (min-width:768px){.c2-hero{padding:40px 0 0;}}
.c2-hero-card{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:var(--glow);
  background:var(--ink-900);
}
.c2-hero-card > img{
  width:100%;
  height:clamp(360px,46vw,540px);
  object-fit:cover;
  opacity:.6;
}
.c2-hero-mask{
  position:absolute;inset:0;
  background:
    linear-gradient(115deg,rgba(5,7,15,.94) 0%,rgba(5,7,15,.74) 46%,rgba(5,7,15,.24) 100%),
    radial-gradient(58% 76% at 12% 26%,rgba(18,216,250,.22),transparent 72%);
}
.c2-hero-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.7),transparent 78%);
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.7),transparent 78%);
}
.glass{
  background:rgba(255,255,255,.05);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  border:1px solid rgba(255,255,255,.1);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
}
.c2-hero-panel{
  position:absolute;
  left:clamp(20px,4%,52px);
  bottom:clamp(20px,5%,52px);
  max-width:640px;
  border-radius:20px;
  padding:clamp(22px,3vw,38px);
  background:rgba(6,10,22,.68);
}
.c2-hero-panel h1{
  font-size:clamp(1.85rem,4.4vw,3.2rem);
  line-height:1.16;
  font-weight:700;
  letter-spacing:.02em;
  margin:16px 0 12px;
}
.c2-hero-panel h1 .grad{
  background:linear-gradient(120deg,var(--electric),var(--violet));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.c2-hero-panel .lead{color:var(--text-2);font-size:.98rem;max-width:560px;}

.stat-row{
  display:flex;
  flex-wrap:wrap;
  gap:14px 40px;
  margin-top:26px;
}
.stat-item{display:flex;flex-direction:column;gap:2px;}
.stat-num{font-size:1.5rem;font-weight:700;color:var(--ember);font-variant-numeric:tabular-nums;line-height:1.2;}
.stat-label{font-size:12.5px;color:var(--text-3);letter-spacing:.06em;}

.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}

@media (max-width:640px){
  .c2-hero-card > img{height:420px;}
  .c2-hero-panel{left:14px;right:14px;bottom:14px;max-width:none;padding:20px;}
  .stat-row{gap:12px 24px;}
}

/* ---------- 卡片 ---------- */
.card{
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-2px);border-color:rgba(18,216,250,.4);box-shadow:var(--glow);}
.card-media{position:relative;overflow:hidden;background:var(--ink-850);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .55s ease;}
.card:hover .card-media img{transform:scale(1.05);}
.ratio-16-9{aspect-ratio:16/9;}
.ratio-4-3{aspect-ratio:4/3;}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{font-size:1.08rem;font-weight:600;line-height:1.5;color:var(--text);transition:color var(--ease);}
.card:hover .card-title{color:var(--electric-hi);}
.card-text{font-size:.9rem;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-link{
  margin-top:auto;
  display:inline-flex;align-items:center;gap:8px;
  font-size:.88rem;color:var(--electric);font-weight:600;
}
.card-link i{transition:transform var(--ease);}
.card:hover .card-link i{transform:translateX(4px);}

.c2-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:24px;
  align-items:start;
}
.c2-col{display:flex;flex-direction:column;gap:24px;}
.c2-col.is-offset{margin-top:60px;}
@media (max-width:900px){
  .c2-grid{grid-template-columns:1fr;gap:20px;}
  .c2-col{gap:20px;}
  .c2-col.is-offset{margin-top:0;}
}

/* ---------- 步骤 ---------- */
.flow-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
@media (max-width:860px){.flow-grid{grid-template-columns:1fr;}}
.flow-card{
  position:relative;
  padding:26px 24px 28px;
  border-radius:var(--radius);
  background:var(--ink-900);
  border:1px solid var(--line);
  transition:border-color var(--ease),transform var(--ease);
}
.flow-card:hover{border-color:rgba(18,216,250,.4);transform:translateY(-2px);}
.flow-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;
  background:rgba(124,92,255,.18);
  color:var(--electric-hi);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  margin-bottom:16px;
}
.flow-card h3{margin-bottom:8px;}
.flow-card p{color:var(--text-2);font-size:.92rem;}

/* ---------- 要点清单 ---------- */
.check-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px 32px;}
@media (max-width:820px){.check-list{grid-template-columns:1fr;}}
.check-item{
  display:flex;gap:14px;align-items:flex-start;
  padding:16px 18px;
  border-radius:var(--radius-sm);
  background:var(--ink-900);
  border:1px solid var(--line);
  transition:border-color var(--ease);
}
.check-item:hover{border-color:rgba(18,216,250,.35);}
.check-idx{
  flex:0 0 auto;
  width:26px;height:26px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:700;
  color:var(--electric);
  background:rgba(18,216,250,.12);
  font-variant-numeric:tabular-nums;
  margin-top:4px;
}
.check-item strong{display:block;font-size:.98rem;font-weight:600;color:var(--text);}
.check-item span{font-size:.88rem;color:var(--text-2);}

/* ---------- FAQ ---------- */
.faq-wrap{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);gap:48px;align-items:start;}
@media (max-width:900px){.faq-wrap{grid-template-columns:1fr;gap:26px;}}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;
  font-size:1rem;font-weight:600;color:var(--text);
  transition:color var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--electric-hi);}
.faq-item summary i{color:var(--electric);transition:transform var(--ease);flex:0 0 auto;}
.faq-item[open] summary{color:var(--electric-hi);}
.faq-item[open] summary i{transform:rotate(45deg);}
.faq-body{
  border-left:2px solid var(--electric);
  padding:2px 0 20px 16px;
  margin-bottom:20px;
  color:var(--text-2);
  font-size:.94rem;
  line-height:1.85;
}

/* ---------- CTA 条带 ---------- */
.cta-band{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid var(--line-strong);
  background:var(--ink-900);
  padding:clamp(30px,5vw,60px);
  box-shadow:var(--glow);
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  opacity:.16;
  mask-image:linear-gradient(to right,rgba(0,0,0,.9),transparent 82%);
  -webkit-mask-image:linear-gradient(to right,rgba(0,0,0,.9),transparent 82%);
}
.cta-band::after{
  content:"";
  position:absolute;right:-120px;top:-140px;
  width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,216,250,.22),transparent 68%);
}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;}
.cta-inner h2{max-width:620px;}
.cta-inner p{color:var(--text-2);margin-top:12px;max-width:600px;font-size:.95rem;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:64px;
  border-top:1px solid var(--line);
  position:relative;
  background:linear-gradient(180deg,rgba(10,15,30,.6),rgba(5,7,15,1));
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;left:12%;top:-160px;
  width:420px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,216,250,.14),transparent 70%);
  pointer-events:none;
}
.footer-grid{
  position:relative;
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-top:56px;
  padding-bottom:40px;
}
@media (max-width:960px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px;}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr;}}
.footer-brand p{margin-top:16px;color:var(--text-2);font-size:.9rem;max-width:340px;}
.site-footer h4{font-size:.95rem;font-weight:600;color:var(--text);margin-bottom:16px;letter-spacing:.04em;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:.9rem;color:var(--text-2);transition:color var(--ease),transform var(--ease);}
.footer-links a:hover{color:var(--electric-hi);transform:translateX(3px);}
.footer-links span{font-size:.86rem;}
.footer-bottom{
  position:relative;
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding-top:20px;
  padding-bottom:28px;
  border-top:1px solid var(--line);
  font-size:.84rem;
  color:var(--text-3);
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;
  right:24px;bottom:24px;
  z-index:70;
  display:flex;align-items:center;gap:10px;
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .28s ease,transform .28s ease;
}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto;}
.float-icon{
  width:46px;height:46px;border-radius:999px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);
  background:rgba(10,15,30,.85);
  backdrop-filter:blur(14px);
  color:var(--text);
  transition:var(--ease);
}
.float-icon:hover{border-color:rgba(18,216,250,.6);color:var(--electric-hi);}
@media (max-width:768px){
  html body{padding-bottom:78px;}
  .float-cta{
    left:0;right:0;bottom:0;gap:10px;
    padding:10px 14px;
    background:rgba(5,7,15,.92);
    backdrop-filter:blur(16px);
    border-top:1px solid var(--line);
  }
  .float-cta .btn{flex:1;}
  .float-icon{flex:0 0 46px;}
}

@media (max-width:900px){
  .brand-actions .link-sub{display:none;}
  .nav-toggle{display:inline-flex;}
  .brand-actions .btn{display:none;}
}

/* roulang page: category3 */
:root{
  --ink-950:#05070F;
  --ink-900:#0A0F1E;
  --ink-850:#101733;
  --electric:#12D8FA;
  --electric-soft:#6BF0FF;
  --violet:#7C5CFF;
  --ember:#FF7A3D;
  --text:#EAF2FF;
  --text-2:#A8B6D4;
  --text-3:#6F7E9E;
  --line:rgba(255,255,255,.08);
  --glass:rgba(255,255,255,.05);
  --r-sm:12px;
  --r-md:16px;
  --r-lg:24px;
  --r-full:999px;
  --shadow-glow:0 0 0 1px rgba(18,216,250,.18), 0 18px 60px -20px rgba(18,216,250,.35);
  --shadow-card:0 20px 50px -30px rgba(0,0,0,.9);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:130px;}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,textarea,select{font:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{list-style:none;padding:0;}
table{border-collapse:collapse;}
:focus-visible{outline:2px solid var(--electric);outline-offset:2px;}
.num{font-variant-numeric:tabular-nums;}

/* 容器 */
.container{width:100%;max-width:1280px;margin:0 auto;padding-left:16px;padding-right:16px;}
@media (min-width:640px){.container{padding-left:24px;padding-right:24px;}}
@media (min-width:1024px){.container{padding-left:32px;padding-right:32px;}}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:70;background:rgba(10,15,30,.72);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--line);box-shadow:inset 0 1px 0 rgba(255,255,255,.12);}
.brand-row{transition:height .28s var(--ease),opacity .22s var(--ease),transform .28s var(--ease);overflow:hidden;}
.brand-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px;}
.site-header.is-scrolled .brand-row{height:0;opacity:0;transform:translateY(-10px);}
.logo{display:inline-flex;align-items:baseline;gap:7px;white-space:nowrap;}
.logo::before{content:"";width:10px;height:10px;border-radius:3px;background:linear-gradient(135deg,var(--electric),var(--violet));box-shadow:0 0 14px rgba(18,216,250,.7);align-self:center;margin-right:2px;}
.logo-main{font-weight:700;font-size:20px;letter-spacing:.02em;color:var(--text);}
.logo-sub{font-size:.72em;letter-spacing:.18em;color:var(--text-3);font-weight:500;}
.brand-actions{display:flex;align-items:center;gap:14px;}
.link-sub{font-size:14px;color:var(--text-2);transition:color .2s var(--ease);}
.link-sub:hover{color:var(--electric);}
.site-header.is-scrolled .brand-row .logo,.site-header.is-scrolled .brand-row .brand-actions{display:none;}
.channel-row{border-top:1px solid var(--line);transition:border-color .2s var(--ease);}
.site-header.is-scrolled .channel-row{border-top-color:transparent;}
.channel-inner{display:flex;gap:6px;align-items:center;height:48px;overflow-x:auto;scrollbar-width:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.channel{position:relative;display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:var(--r-full);font-size:15px;color:var(--text-2);white-space:nowrap;transition:background .2s var(--ease),color .2s var(--ease);}
.channel:hover{color:var(--text);background:rgba(255,255,255,.06);}
.channel.is-active{color:#05070F;background:linear-gradient(135deg,var(--electric),var(--violet));font-weight:600;box-shadow:0 10px 28px -12px rgba(18,216,250,.75);}
.channel.is-active::after{content:"";position:absolute;left:22%;right:22%;bottom:-9px;height:2px;border-radius:2px;background:var(--electric);box-shadow:0 0 12px rgba(18,216,250,.9);}
.nav-toggle{display:none;width:42px;height:42px;border-radius:var(--r-sm);border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);align-items:center;justify-content:center;transition:border-color .2s var(--ease),background .2s var(--ease);}
.nav-toggle:hover{border-color:rgba(18,216,250,.5);background:rgba(18,216,250,.08);}
.mobile-drawer{position:fixed;inset:0;z-index:90;background:rgba(5,7,15,.97);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);transform:translateY(-100%);opacity:0;visibility:hidden;transition:transform .3s var(--ease),opacity .3s var(--ease),visibility .3s;}
.mobile-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;height:72px;padding:0 16px;border-bottom:1px solid var(--line);}
.drawer-close{width:42px;height:42px;border-radius:var(--r-sm);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;}
.drawer-links{display:flex;flex-direction:column;padding:12px 16px 40px;}
.drawer-links a{font-size:22px;font-weight:600;padding:18px 4px;border-bottom:1px solid var(--line);color:var(--text);}
.drawer-links a.is-active{color:var(--electric);}
.drawer-links a:hover{color:var(--electric);}
@media (max-width:1023px){
  .channel-row{display:none;}
  .nav-toggle{display:inline-flex;}
  .brand-actions .link-sub,.brand-actions .btn{display:none;}
}
@media (min-width:1024px){.mobile-drawer{display:none;}}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:var(--r-full);font-size:15px;font-weight:600;letter-spacing:.01em;transition:transform .2s var(--ease),filter .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-primary{background:linear-gradient(135deg,var(--electric),var(--violet));color:#05070F;box-shadow:var(--shadow-glow);}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 0 0 1px rgba(18,216,250,.28),0 22px 70px -22px rgba(18,216,250,.5);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.15);color:var(--text);}
.btn-ghost:hover{border-color:rgba(18,216,250,.5);background:rgba(255,255,255,.05);transform:translateY(-2px);}
.btn-ghost:active{transform:scale(.98);}
.btn[disabled]{opacity:.45;cursor:not-allowed;}

/* 通用板块 */
.section{padding:64px 0;border-top:1px solid var(--line);}
.section:first-of-type{border-top:0;}
@media (min-width:768px){.section{padding:88px 0;}}
.section-head{max-width:720px;margin:0 auto 40px;text-align:center;}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.28em;color:var(--electric);text-transform:uppercase;margin-bottom:14px;}
.section-head h2{font-size:clamp(1.5rem,3vw,2.25rem);line-height:1.25;font-weight:700;letter-spacing:.01em;}
.section-head p{margin-top:14px;color:var(--text-2);font-size:15px;}
.divider-fade{height:1px;background:linear-gradient(90deg,transparent,rgba(18,216,250,.35),transparent);}
.grad-text{background:linear-gradient(100deg,var(--electric),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent;}

/* Hero */
.hero{position:relative;overflow:hidden;padding:72px 0 64px;text-align:center;}
@media (min-width:768px){.hero{padding:96px 0 80px;}}
.hero-bg{position:absolute;inset:0;z-index:0;}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.16;
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 88%);
  mask-image:linear-gradient(180deg,rgba(0,0,0,.95),transparent 88%);}
.hero-grid-lines{position:absolute;inset:0;z-index:1;opacity:.5;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 20%,rgba(0,0,0,.9),transparent 70%);
  mask-image:radial-gradient(circle at 50% 20%,rgba(0,0,0,.9),transparent 70%);}
.hero-blob{position:absolute;z-index:1;width:520px;height:520px;border-radius:50%;filter:blur(120px);opacity:.32;pointer-events:none;}
.hero-blob.a{top:-220px;left:-120px;background:var(--electric);}
.hero-blob.b{bottom:-260px;right:-140px;background:var(--violet);}
.hero-inner{position:relative;z-index:2;max-width:900px;margin:0 auto;}
.eyebrow{display:inline-flex;align-items:center;gap:10px;padding:7px 18px;border-radius:var(--r-full);border:1px solid rgba(18,216,250,.28);background:rgba(18,216,250,.07);font-size:13px;letter-spacing:.16em;color:var(--electric-soft);margin-bottom:22px;}
.hero-title{font-size:clamp(2rem,5vw,3.5rem);line-height:1.15;font-weight:700;letter-spacing:.02em;}
.hero-sub{margin-top:18px;font-size:clamp(1.05rem,2vw,1.35rem);color:var(--text);font-weight:600;}
.hero-lead{margin:18px auto 0;max-width:760px;color:var(--text-2);font-size:16px;line-height:1.9;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:32px;}
.hero-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:48px;max-width:840px;margin-left:auto;margin-right:auto;}
@media (min-width:768px){.hero-stats{grid-template-columns:repeat(4,1fr);}}
.stat{padding:20px 14px;border-radius:var(--r-md);background:var(--ink-900);border:1px solid var(--line);}
.stat b{display:block;font-size:clamp(1.4rem,3vw,1.9rem);font-weight:700;color:var(--ember);font-variant-numeric:tabular-nums;line-height:1.2;}
.stat span{display:block;margin-top:6px;font-size:13px;color:var(--text-3);}

/* 筛选片 */
.filter-bar{display:grid;grid-template-columns:1fr;gap:16px;padding:22px;border-radius:var(--r-lg);background:var(--ink-900);border:1px solid var(--line);}
@media (min-width:768px){.filter-bar{grid-template-columns:repeat(3,1fr);gap:24px;padding:26px 30px;}}
.filter-col{border-left:1px solid var(--line);padding-left:18px;}
.filter-col:first-child{border-left:0;padding-left:0;}
@media (max-width:767px){.filter-col{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:16px;}.filter-col:first-child{border-top:0;padding-top:0;}}
.filter-label{display:block;font-size:12px;letter-spacing:.2em;color:var(--text-3);margin-bottom:12px;}
.chips{display:flex;flex-wrap:wrap;gap:8px;}
.chip{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:var(--r-full);font-size:13px;color:var(--text-2);border:1px solid var(--line);background:rgba(255,255,255,.03);}
.chip.is-on{color:var(--electric);border-color:rgba(18,216,250,.45);background:rgba(18,216,250,.1);}

/* 卡片网格 */
.card-grid{display:grid;grid-template-columns:1fr;gap:16px;}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr);gap:20px;}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
.card{display:flex;flex-direction:column;background:var(--ink-900);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);}
.card:hover{transform:translateY(-2px);border-color:rgba(18,216,250,.4);box-shadow:0 22px 50px -32px rgba(18,216,250,.6);}
.card-media{position:relative;display:block;aspect-ratio:16/9;overflow:hidden;background:var(--ink-850);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease);}
.card:hover .card-media img{transform:scale(1.05);}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(5,7,15,.72));}
.card-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1;}
.badge{align-self:flex-start;padding:4px 12px;border-radius:var(--r-full);font-size:12px;letter-spacing:.08em;color:var(--electric);background:rgba(124,92,255,.16);}
.card h3{font-size:1.125rem;line-height:1.4;font-weight:600;}
.card h3 a{transition:color .2s var(--ease);}
.card h3 a:hover{color:var(--electric);}
.card p{color:var(--text-2);font-size:14.5px;line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-link{margin-top:auto;display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--electric);transition:gap .2s var(--ease);}
.card-link:hover{gap:12px;}

/* 要点清单 */
.steps-layout{display:grid;grid-template-columns:1fr;gap:28px;}
@media (min-width:1024px){.steps-layout{grid-template-columns:0.85fr 1.15fr;gap:56px;align-items:start;}}
.steps-aside h2{font-size:clamp(1.5rem,3vw,2.25rem);line-height:1.25;font-weight:700;}
.steps-aside p{margin-top:16px;color:var(--text-2);font-size:15px;}
.num-list{display:flex;flex-direction:column;gap:0;}
.num-list li{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--line);}
.num-list li:first-child{padding-top:0;}
.num-list li:last-child{border-bottom:0;padding-bottom:0;}
.num-list .idx{flex:0 0 auto;font-size:15px;font-weight:700;color:var(--electric);font-variant-numeric:tabular-nums;letter-spacing:.06em;padding-top:2px;}
.num-list h3{font-size:16px;font-weight:600;margin-bottom:6px;}
.num-list p{color:var(--text-2);font-size:14.5px;line-height:1.8;}

/* FAQ */
.faq-wrap{max-width:900px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 0;font-size:16px;font-weight:600;cursor:pointer;transition:color .2s var(--ease);}
.faq-item summary:hover{color:var(--electric);}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{flex:0 0 auto;color:var(--electric);transition:transform .2s var(--ease);}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-a{padding:0 0 22px 18px;border-left:2px solid var(--electric);color:var(--text-2);font-size:15px;line-height:1.85;margin-left:2px;}

/* CTA + 表单 */
.cta{position:relative;overflow:hidden;border-radius:var(--r-lg);border:1px solid var(--line);background:var(--ink-900);padding:36px 24px;}
@media (min-width:768px){.cta{padding:52px 48px;}}
.cta-bg{position:absolute;inset:0;z-index:0;}
.cta-bg img{width:100%;height:100%;object-fit:cover;opacity:.14;
  -webkit-mask-image:linear-gradient(90deg,rgba(0,0,0,.9),transparent 85%);
  mask-image:linear-gradient(90deg,rgba(0,0,0,.9),transparent 85%);}
.cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:1024px){.cta-inner{grid-template-columns:1fr 1fr;gap:56px;align-items:start;}}
.cta h2{font-size:clamp(1.5rem,3vw,2.1rem);line-height:1.3;font-weight:700;}
.cta .cta-desc{margin-top:16px;color:var(--text-2);font-size:15px;line-height:1.9;}
.cta-points{margin-top:22px;display:flex;flex-direction:column;gap:10px;}
.cta-points li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-2);}
.cta-points i{color:var(--electric);margin-top:5px;}
.form{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:var(--r-md);padding:24px;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:inset 0 1px 0 rgba(255,255,255,.12);}
.field{margin-bottom:16px;}
.field label{display:block;font-size:14px;color:var(--text-3);margin-bottom:7px;}
.field input,.field textarea{width:100%;background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:var(--r-sm);padding:12px 14px;color:var(--text);transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);}
.field input::placeholder,.field textarea::placeholder{color:#5b6884;}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--electric);background:rgba(18,216,250,.05);box-shadow:0 0 0 3px rgba(18,216,250,.18);}
.form-ok{display:none;margin-top:14px;padding:12px 14px;border-radius:var(--r-sm);border:1px solid rgba(18,216,250,.35);background:rgba(18,216,250,.08);color:var(--electric-soft);font-size:14px;}
.form-ok.is-on{display:block;}

/* 浮动 CTA */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:80;display:flex;align-items:center;gap:10px;opacity:0;pointer-events:none;transform:translateY(12px);transition:opacity .25s var(--ease),transform .25s var(--ease);}
.float-cta.is-visible{opacity:1;pointer-events:auto;transform:translateY(0);}
.float-cta .btn{box-shadow:var(--shadow-glow);}
@media (max-width:767px){
  .float-cta{left:0;right:0;bottom:0;padding:10px 12px;gap:8px;background:rgba(5,7,15,.94);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-top:1px solid var(--line);}
  .float-cta .btn{flex:1;padding:11px 10px;font-size:14px;}
  body{padding-bottom:84px;}
}

/* 页脚 */
.site-footer{position:relative;margin-top:64px;border-top:1px solid var(--line);background:linear-gradient(180deg,rgba(18,216,250,.06),transparent 40%),var(--ink-900);}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding:52px 0 32px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);gap:36px;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 36px;}}
.footer-brand p{margin-top:16px;color:var(--text-2);font-size:14.5px;line-height:1.85;max-width:340px;}
.site-footer h4{font-size:14px;font-weight:600;letter-spacing:.1em;color:var(--text);margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a,.footer-links span{font-size:14px;color:var(--text-3);transition:color .2s var(--ease);}
.footer-links a:hover{color:var(--electric);}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;padding:20px 0 28px;border-top:1px solid var(--line);color:var(--text-3);font-size:13px;}
.muted{color:var(--text-3);}