/* roulang page: index */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1020;
  --bg-2:#101A31;
  --brand:#FF8A2B;
  --brand-2:#FFB547;
  --brand-deep:#C95A10;
  --cyan:#38E1FF;
  --ok:#3DDC97;
  --warn:#FFC24B;
  --danger:#FF4D6D;
  --tx-1:#F2F5FF;
  --tx-2:#A9B6D4;
  --tx-3:#6C7A9B;
  --line:rgba(255,255,255,.09);
  --line-soft:rgba(255,255,255,.06);
  --glass:rgba(20,30,54,.55);
  --r-lg:18px;
  --r-md:12px;
  --r-sm:8px;
  --shadow-1:0 10px 30px -14px rgba(0,0,0,.65);
  --shadow-2:0 18px 44px -18px rgba(0,0,0,.8);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg-0);
  color:var(--tx-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(760px 540px at 6% -8%,rgba(255,138,43,.14),transparent 70%),
    radial-gradient(700px 540px at 106% 106%,rgba(56,225,255,.10),transparent 72%),
    linear-gradient(180deg,#05080F 0%,#0A1020 52%,#05080F 100%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.026) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.026) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(circle at 50% 18%,#000 0%,transparent 76%);
  mask-image:radial-gradient(circle at 50% 18%,#000 0%,transparent 76%);
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
input:focus-visible,textarea:focus-visible{outline:none}
.skip{position:absolute;left:-9999px;top:0}
.skip:focus{left:16px;top:12px;z-index:200;padding:10px 16px;background:var(--brand);color:#1A1005;border-radius:8px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media(max-width:1023px){.container{padding:0 20px}}
@media(max-width:639px){.container{padding:0 16px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(6,10,20,.55);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{background:rgba(6,10,20,.88);border-bottom-color:rgba(255,255,255,.08)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;white-space:nowrap;flex:0 0 auto}
.logo-mark{
  width:32px;height:32px;border-radius:9px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  clip-path:polygon(22% 0,100% 0,100% 78%,78% 100%,0 100%,0 22%);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 20px -8px rgba(255,138,43,.9);
  flex:0 0 auto;
}
.logo-mark span{font-size:13px;font-weight:800;color:#1A1005;letter-spacing:-.02em}
.logo-text{font-size:16.5px;font-weight:800;letter-spacing:-.01em;line-height:1}
.logo-text .hl{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:44px;padding:0 13px;font-size:15px;color:var(--tx-2);
  border-radius:10px;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:6px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  box-shadow:0 0 10px rgba(255,138,43,.65);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover{color:var(--tx-1)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--tx-1);font-weight:600}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.link-ghost{font-size:14px;color:var(--tx-2);transition:color .2s ease}
.link-ghost:hover{color:var(--cyan)}
.menu-btn{
  display:none;width:44px;height:44px;border-radius:10px;
  align-items:center;justify-content:center;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);color:var(--tx-1);
  cursor:pointer;transition:border-color .2s ease,background .2s ease;
}
.menu-btn:hover{border-color:var(--brand);background:rgba(255,138,43,.1)}
.mobile-drawer{
  overflow:hidden;max-height:0;
  transition:max-height .3s ease;
  background:rgba(8,13,26,.94);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-top:1px solid rgba(255,255,255,.06);
}
.mobile-drawer.is-open{max-height:460px}
.drawer-inner{padding:10px 20px 20px}
.drawer-link{
  display:flex;align-items:center;height:52px;padding:0 4px;
  font-size:16px;color:var(--tx-2);border-bottom:1px solid var(--line-soft);
  transition:color .2s ease,padding-left .2s ease;
}
.drawer-link:hover,.drawer-link.is-active{color:var(--brand);padding-left:10px}
.drawer-cta{margin-top:16px;width:100%}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:12px;
  font-size:15px;font-weight:600;letter-spacing:.02em;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease,filter .18s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#1A1005;
  box-shadow:0 8px 26px -8px rgba(255,138,43,.6),0 0 0 1px rgba(255,138,43,.45);
}
.btn-primary:hover{
  transform:translateY(-1px);filter:brightness(1.06);
  box-shadow:0 12px 32px -8px rgba(255,138,43,.72),0 0 0 1px rgba(255,138,43,.62);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px -10px rgba(255,138,43,.7),0 0 0 1px rgba(255,138,43,.55)}
.btn-secondary{background:transparent;border-color:rgba(255,255,255,.18);color:var(--tx-1)}
.btn-secondary:hover{border-color:var(--brand);background:rgba(255,138,43,.08);color:var(--brand-2)}
.btn-ghost{background:none;border:none;padding:0;height:auto;color:var(--cyan);font-weight:600}
.btn-ghost svg{transition:transform .2s ease}
.btn-ghost:hover{color:var(--brand)}
.btn-ghost:hover svg{transform:translateX(3px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px}
.btn-block{width:100%}

/* ============ 倒计时条 ============ */
.count-bar{
  position:relative;
  background:linear-gradient(180deg,rgba(255,138,43,.11),rgba(255,138,43,.03));
  border-top:1px solid rgba(255,138,43,.24);
  border-bottom:1px solid rgba(255,138,43,.24);
}
.count-inner{display:flex;align-items:center;gap:16px;min-height:52px;padding:8px 0;flex-wrap:wrap}
.count-label{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--tx-2)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:24px;padding:0 10px;border-radius:8px;
  font-size:12px;font-weight:600;letter-spacing:.02em;line-height:1;white-space:nowrap;
}
.badge-brand{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#1A1005}
.badge-cyan{background:rgba(56,225,255,.12);color:var(--cyan);border:1px solid rgba(56,225,255,.28)}
.badge-ok{background:rgba(61,220,151,.12);color:var(--ok);border:1px solid rgba(61,220,151,.3)}
.badge-warn{background:rgba(255,194,75,.12);color:var(--warn);border:1px solid rgba(255,194,75,.3)}
.count-nums{display:flex;gap:8px;margin-left:auto;margin-right:auto}
.count-block{
  width:38px;height:46px;border-radius:8px;
  background:rgba(0,0,0,.35);border:1px solid rgba(255,138,43,.35);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;
}
.count-block b{font-size:17px;font-weight:800;line-height:1;color:var(--brand-2);font-variant-numeric:tabular-nums}
.count-block span{font-size:10px;color:var(--tx-3);line-height:1}
.count-link{margin-left:auto}

/* ============ Hero ============ */
.hero{position:relative;padding:64px 0 84px;overflow:hidden;border-bottom:1px solid var(--line-soft)}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;opacity:.6}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(5,8,15,.78) 0%,rgba(5,8,15,.72) 48%,rgba(10,16,32,.96) 100%),
    radial-gradient(600px 380px at 18% 30%,rgba(255,138,43,.16),transparent 70%);
}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero-copy h1{
  font-size:clamp(30px,4.2vw,52px);font-weight:800;line-height:1.15;letter-spacing:-.01em;
  margin:18px 0 0;
}
.hero-sub{margin-top:16px;font-size:16px;line-height:1.8;color:var(--tx-2);max-width:640px}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:26px;font-size:13px;color:var(--tx-3)}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--r-lg);
  border:1px solid rgba(255,255,255,.12);
  box-shadow:0 26px 64px -30px rgba(0,0,0,.9);
}
.glass-float{
  position:absolute;left:-18px;bottom:-22px;width:238px;padding:16px 18px;
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow-2);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
}
.glass-float b{display:block;font-size:20px;font-weight:800;color:var(--brand-2);font-variant-numeric:tabular-nums;line-height:1.2}
.glass-float p{font-size:12.5px;color:var(--tx-3);margin-top:6px;line-height:1.6}

/* ============ 通用卡片 ============ */
.glass-card{
  position:relative;overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow-1);
  -webkit-backdrop-filter:blur(14px) saturate(120%);backdrop-filter:blur(14px) saturate(120%);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.glass-card::before{
  content:"";position:absolute;top:0;left:-70%;width:70%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,181,71,.9),transparent);
  opacity:0;transition:left .4s ease,opacity .3s ease;pointer-events:none;
}
.glass-card:hover{transform:translateY(-4px);border-color:rgba(255,255,255,.18);box-shadow:inset 0 1px 0 rgba(255,255,255,.2),var(--shadow-2)}
.glass-card:hover::before{opacity:1;left:100%}

/* ============ 板块 ============ */
.section{padding:92px 0;scroll-margin-top:84px}
.section-alt{background:linear-gradient(180deg,rgba(16,26,49,.42),rgba(16,26,49,0))}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:38px;flex-wrap:wrap}
.section-title{
  position:relative;padding-left:16px;
  font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3;
}
.section-title::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
  box-shadow:0 0 12px rgba(255,138,43,.6);
}
.section-sub{margin-top:10px;font-size:15px;color:var(--tx-2);max-width:680px}

/* ============ 卖点 2+1 ============ */
.perk-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}
.perk{padding:26px 26px 24px;display:flex;flex-direction:column;gap:10px}
.perk-grid > .perk:nth-child(1){grid-column:1;grid-row:1}
.perk-grid > .perk:nth-child(2){grid-column:1;grid-row:2}
.perk-grid > .perk:nth-child(3){grid-column:2;grid-row:1/3;justify-content:center}
.perk-num{
  width:38px;height:38px;border-radius:50%;
  border:1.5px solid rgba(255,138,43,.6);color:var(--brand-2);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;font-variant-numeric:tabular-nums;
  box-shadow:0 0 18px -6px rgba(255,138,43,.5);
}
.perk h3{font-size:19px;font-weight:600;line-height:1.4}
.perk p{font-size:14.5px;color:var(--tx-2);line-height:1.75}
.perk .badge{align-self:flex-start}
.perk-tall h3{font-size:22px}
.perk-list{margin-top:8px;display:flex;flex-direction:column;gap:10px}
.perk-list li{display:flex;gap:10px;font-size:14.5px;color:var(--tx-2);line-height:1.7}
.perk-list li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;margin-top:9px;border-radius:2px;
  background:var(--cyan);box-shadow:0 0 10px rgba(56,225,255,.6);
}

/* ============ 数据条 ============ */
.stat-strip{border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);background:rgba(16,26,49,.35)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:30px 0}
.stat{display:flex;flex-direction:column;gap:6px}
.stat b{font-size:26px;font-weight:800;color:var(--brand-2);font-variant-numeric:tabular-nums;line-height:1.1}
.stat span{font-size:13.5px;color:var(--tx-3)}

/* ============ 图墙 ============ */
.gallery{display:grid;grid-template-columns:repeat(6,1fr);grid-auto-rows:180px;gap:16px}
.gallery-item{position:relative;overflow:hidden;border-radius:var(--r-md);border:1px solid var(--line);display:block}
.gallery-item:nth-child(1){grid-column:span 4;grid-row:span 2}
.gallery-item:nth-child(2){grid-column:span 2}
.gallery-item:nth-child(3){grid-column:span 2}
.gallery-item:nth-child(4),
.gallery-item:nth-child(5),
.gallery-item:nth-child(6){grid-column:span 2}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease,filter .35s ease}
.gallery-item::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.1) 0%,rgba(5,8,15,.16) 44%,rgba(5,8,15,.88) 100%);
}
.gallery-item:hover img{transform:scale(1.04);filter:brightness(1.06)}
.gallery-item .badge{position:absolute;top:12px;left:12px;z-index:2}
.gallery-cap{position:absolute;left:16px;right:16px;bottom:14px;z-index:2}
.gallery-cap h3{font-size:17px;font-weight:600;line-height:1.4}
.gallery-cap p{font-size:13px;color:var(--tx-3);margin-top:4px}

/* ============ 最新信息 ============ */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.post-card{display:flex;flex-direction:column;padding:0}
.post-thumb{position:relative;overflow:hidden;aspect-ratio:16/9;background:linear-gradient(135deg,var(--bg-2),var(--bg-1))}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-title{font-size:18px;font-weight:600;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;transition:color .2s ease}
.post-card:hover .post-title{color:var(--brand-2)}
.post-sum{
  font-size:14px;color:var(--tx-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:12px;border-top:1px solid var(--line-soft);font-size:13px;color:var(--tx-3)}
.post-more{color:var(--cyan);font-weight:600}
.empty-state{
  display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:56px 24px;text-align:center;
  background:rgba(16,26,49,.35);border:1px dashed rgba(255,255,255,.14);border-radius:var(--r-lg);
}
.empty-state p{color:var(--tx-2);font-size:15px}
.empty-state svg{color:var(--tx-3)}

/* ============ 表单 CTA ============ */
.cta-band{position:relative;overflow:hidden;border-radius:22px;padding:44px}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(560px 320px at 22% 8%,rgba(255,138,43,.22),transparent 70%);
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.cta-copy h2{font-size:clamp(24px,2.6vw,32px);font-weight:700;line-height:1.3}
.cta-copy > p{margin-top:14px;font-size:15px;color:var(--tx-2);line-height:1.8;max-width:520px}
.cta-points{margin-top:24px;display:flex;flex-direction:column;gap:14px}
.cta-points li{display:flex;gap:12px;font-size:14.5px;color:var(--tx-2);line-height:1.7}
.cta-points .idx{
  flex:0 0 auto;width:24px;height:24px;border-radius:8px;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(56,225,255,.12);border:1px solid rgba(56,225,255,.3);
  color:var(--cyan);font-size:12px;font-weight:700;
}
.signup-form{padding:26px;display:flex;flex-direction:column;gap:16px}
.form-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.form-head h3{font-size:18px;font-weight:600}
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-size:14px;color:var(--tx-2)}
.field input{
  height:50px;border-radius:12px;padding:0 14px;
  background:rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.14);
  color:var(--tx-1);transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field input::placeholder{color:var(--tx-3)}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(255,138,43,.18);background:rgba(255,255,255,.06)}
.field input.is-error{border-color:var(--danger);box-shadow:0 0 0 3px rgba(255,77,109,.16)}
.check-row{display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--tx-2);line-height:1.6}
.check-row input{width:18px;height:18px;margin-top:3px;accent-color:var(--brand);flex:0 0 auto}
.check-row a{color:var(--cyan)}
.form-msg{font-size:13.5px;line-height:1.6;min-height:20px;color:var(--tx-3)}
.form-msg.is-ok{color:var(--ok)}
.form-msg.is-err{color:var(--danger)}
.form-steps{display:flex;flex-direction:column;gap:10px;margin-top:4px;padding-top:16px;border-top:1px solid var(--line-soft)}
.form-steps li{display:flex;gap:10px;font-size:13px;color:var(--tx-3)}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 20px}
.faq-item{
  border-radius:12px;border:1px solid var(--line);background:rgba(20,30,54,.45);
  overflow:hidden;transition:border-color .2s ease,background .2s ease;
}
.faq-item[open]{border-color:rgba(255,138,43,.4);background:rgba(20,30,54,.66)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:14px;
  min-height:56px;padding:14px 20px;font-size:16px;font-weight:600;line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand-2)}
.faq-sign{position:relative;flex:0 0 auto;width:18px;height:18px;color:var(--brand);transition:transform .2s ease}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px}
.faq-sign::before{width:14px;height:2px;transform:translate(-50%,-50%)}
.faq-sign::after{width:2px;height:14px;transform:translate(-50%,-50%);transition:opacity .2s ease}
.faq-item[open] .faq-sign::after{opacity:0}
.faq-body{padding:0 20px 18px;font-size:15px;line-height:1.85;color:var(--tx-2);background:rgba(255,255,255,.03)}

/* ============ 互链带 ============ */
.link-band{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.link-card{padding:22px 24px;display:flex;flex-direction:column;gap:8px}
.link-card h3{font-size:17px;font-weight:600}
.link-card p{font-size:13.5px;color:var(--tx-3);line-height:1.7}
.link-card span{font-size:13px;color:var(--cyan);font-weight:600;margin-top:4px}

/* ============ 页脚 ============ */
.site-footer{margin-top:20px;background:#04070F;position:relative;padding-bottom:24px}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,138,43,.75),transparent);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding:56px 24px 40px}
.footer-brand p{font-size:13.5px;color:var(--tx-3);line-height:1.8;margin-top:14px;max-width:320px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--tx-1);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:13px;color:var(--tx-3);transition:color .2s ease}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding:20px 24px 0;border-top:1px solid var(--line-soft);
  font-size:12px;color:var(--tx-3);
}
.footer-bottom p{line-height:1.7}

/* ============ 移动端底部 Tab ============ */
.tabbar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:rgba(8,13,26,.86);
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-top:1px solid rgba(255,255,255,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar-inner{display:grid;grid-template-columns:repeat(5,1fr)}
.tab-item{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  height:60px;font-size:11px;color:var(--tx-3);
  transition:color .2s ease;
}
.tab-item svg{width:22px;height:22px;stroke-width:1.6;transition:transform .2s ease}
.tab-item::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%) scaleX(0);
  width:24px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  box-shadow:0 0 10px rgba(255,138,43,.8);
  transition:transform .2s ease;
}
.tab-item.is-active{color:var(--brand)}
.tab-item.is-active svg{transform:translateY(-2px)}
.tab-item.is-active::before{transform:translateX(-50%) scaleX(1)}

/* ============ 响应式 ============ */
@media(max-width:1023px){
  .main-nav{display:none}
  .menu-btn{display:inline-flex}
  .link-ghost{display:none}
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero{padding:48px 0 64px}
  .glass-float{left:12px;bottom:-18px;width:210px}
  .perk-grid{grid-template-columns:1fr}
  .perk-grid > .perk:nth-child(1),
  .perk-grid > .perk:nth-child(2),
  .perk-grid > .perk:nth-child(3){grid-column:1;grid-row:auto}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .cta-grid{grid-template-columns:1fr;gap:32px}
  .cta-band{padding:32px}
  .gallery{grid-auto-rows:160px}
  .link-band{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:44px 20px 32px}
  .section{padding:68px 0}
}
@media(max-width:639px){
  .header-inner{height:60px;gap:12px}
  .logo-text{font-size:15px}
  .header-actions .btn{display:none}
  .count-inner{gap:10px;justify-content:center;padding:10px 0}
  .count-label{font-size:13px;justify-content:center;width:100%}
  .count-nums{margin:0}
  .count-block{width:32px;height:40px}
  .count-block b{font-size:15px}
  .count-link{margin:0;width:100%;text-align:center}
  .hero{padding:36px 0 56px}
  .hero-visual img{aspect-ratio:16/12}
  .glass-float{position:static;width:100%;margin-top:14px}
  .section{padding:52px 0}
  .section-head{margin-bottom:26px}
  .post-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr);grid-auto-rows:140px}
  .gallery-item:nth-child(1){grid-column:span 2;grid-row:span 2}
  .gallery-item:nth-child(2),
  .gallery-item:nth-child(3),
  .gallery-item:nth-child(4),
  .gallery-item:nth-child(5),
  .gallery-item:nth-child(6){grid-column:span 1}
  .gallery-cap h3{font-size:15px}
  .gallery-cap p{display:none}
  .section-title{font-size:22px}
  .faq-grid{grid-template-columns:1fr}
  .cta-band{padding:24px}
  .signup-form{padding:20px}
  .btn{width:100%}
  .btn-row{flex-direction:column}
  .btn-ghost{width:auto}
  .stat-grid{gap:20px}
  .stat b{font-size:22px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .tabbar{display:block}
  body{padding-bottom:78px}
}

/* roulang page: category1 */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1020;
  --bg-2:#101A31;
  --brand:#FF8A2B;
  --brand-2:#FFB547;
  --brand-deep:#C95A10;
  --cyan:#38E1FF;
  --ok:#3DDC97;
  --warn:#FFC24B;
  --danger:#FF4D6D;
  --tx-1:#F2F5FF;
  --tx-2:#A9B6D4;
  --tx-3:#6C7A9B;
  --glass-bg:rgba(20,30,54,.55);
  --glass-border:rgba(255,255,255,.09);
  --glass-top:inset 0 1px 0 rgba(255,255,255,.14);
  --r-lg:18px;
  --r-md:12px;
  --r-sm:8px;
  --shadow:0 10px 30px -14px rgba(0,0,0,.65);
  --glow-brand:0 8px 26px -8px rgba(255,138,43,.6),0 0 0 1px rgba(255,138,43,.45);
  --glow-cyan:0 0 18px -2px rgba(56,225,255,.35);
  --header-h:68px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(760px 520px at 8% -6%, rgba(255,138,43,.08), transparent 62%),
    radial-gradient(720px 560px at 102% 12%, rgba(56,225,255,.06), transparent 60%),
    var(--bg-0);
  color:var(--tx-1);
  font-family:'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Source Han Sans',sans-serif;
  font-size:16px;
  line-height:1.75;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;background:none;border:none;}
h1,h2,h3,h4{line-height:1.3;margin:0;font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 16px;}
@media(min-width:768px){.container{padding:0 24px;}}
@media(min-width:1024px){.container{padding:0 32px;}}
section[id],div[id]{scroll-margin-top:84px;}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,10,20,.55);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(6,10,20,.88);
  border-bottom-color:rgba(255,255,255,.08);
}
.header-inner{
  height:var(--header-h);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.logo{display:flex;align-items:center;gap:10px;min-width:0;}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;
  clip-path:polygon(22% 0,100% 0,100% 78%,78% 100%,0 100%,0 22%);
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#1A1005;font-weight:800;font-size:17px;letter-spacing:0;
}
.logo-text{
  font-weight:800;font-size:16px;color:var(--tx-1);letter-spacing:-.01em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:60vw;
}
.logo-text .hl{
  background:linear-gradient(120deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.main-nav{display:none;align-items:center;gap:6px;}
@media(min-width:1024px){.main-nav{display:flex;}}
.nav-link{
  position:relative;padding:8px 12px;font-size:15px;color:var(--tx-2);
  transition:color .2s ease;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
  box-shadow:0 0 10px rgba(255,138,43,.7);
  transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
}
.nav-link:hover{color:var(--tx-1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--tx-1);}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:10px;}
.btn-ghost-link{
  display:none;font-size:14px;color:var(--cyan);padding:8px 6px;transition:color .2s ease;
}
@media(min-width:1024px){.btn-ghost-link{display:inline-block;}}
.btn-ghost-link:hover{color:var(--brand);}
.menu-toggle{
  width:44px;height:44px;display:grid;place-items:center;border-radius:var(--r-md);
  border:1px solid rgba(255,255,255,.14);color:var(--tx-1);
  transition:border-color .2s ease,background .2s ease;
}
.menu-toggle:hover{border-color:var(--brand);background:rgba(255,138,43,.08);}
@media(min-width:1024px){.menu-toggle{display:none;}}
.mobile-drawer{
  display:none;border-top:1px solid rgba(255,255,255,.08);
  background:rgba(8,13,26,.96);backdrop-filter:blur(14px);
  padding:10px 16px 18px;
}
.mobile-drawer.is-open{display:block;}
.mobile-drawer a.drawer-link{
  display:flex;align-items:center;height:52px;font-size:16px;color:var(--tx-2);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.mobile-drawer a.drawer-link.is-active{color:var(--brand);font-weight:600;}
.mobile-drawer .drawer-cta{margin-top:14px;width:100%;justify-content:center;}
@media(min-width:1024px){.mobile-drawer{display:none !important;}}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:transform .18s ease,box-shadow .18s ease,filter .18s ease,background .18s ease,border-color .18s ease;
}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px;border-radius:10px;}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#1A1005;box-shadow:var(--glow-brand);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 12px 32px -8px rgba(255,138,43,.72),0 0 0 1px rgba(255,138,43,.5);}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px -6px rgba(255,138,43,.6),0 0 0 1px rgba(255,138,43,.45);}
.btn-secondary{
  background:transparent;border:1px solid rgba(255,255,255,.18);color:var(--tx-1);
}
.btn-secondary:hover{border-color:var(--brand);background:rgba(255,138,43,.08);transform:translateY(-1px);}
.btn-secondary:active{transform:translateY(0);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-size:15px;font-weight:600;
  transition:color .2s ease;
}
.link-arrow svg{transition:transform .2s ease;}
.link-arrow:hover{color:var(--brand);}
.link-arrow:hover svg{transform:translateX(3px);}

/* ============ glass card ============ */
.glass{
  position:relative;
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow),var(--glass-top);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
}
.card-hover{transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;overflow:hidden;}
.card-hover::after{
  content:"";position:absolute;top:0;left:-40%;width:40%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,181,71,.85),transparent);
  opacity:0;transition:opacity .3s ease;
}
.card-hover:hover{transform:translateY(-4px);border-color:rgba(255,181,71,.34);box-shadow:0 18px 40px -18px rgba(0,0,0,.8),var(--glass-top);}
.card-hover:hover::after{opacity:1;}

/* ============ badges / chips ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;letter-spacing:.02em;font-weight:600;
  padding:4px 10px;border-radius:var(--r-sm);line-height:1.5;white-space:nowrap;
}
.badge-cyan{background:rgba(56,225,255,.12);color:var(--cyan);border:1px solid rgba(56,225,255,.28);}
.badge-brand{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#1A1005;}
.badge-ok{background:rgba(61,220,151,.1);color:var(--ok);border:1px solid rgba(61,220,151,.35);}
.badge-warn{background:rgba(255,194,75,.12);color:var(--warn);border:1px solid rgba(255,194,75,.3);}

/* ============ hero ============ */
.page-hero{
  position:relative;overflow:hidden;border-bottom:1px solid rgba(255,255,255,.07);
  padding:44px 0 36px;
}
.page-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.page-hero .hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.72),rgba(10,16,32,.92) 70%,var(--bg-1));
}
.page-hero .container{position:relative;z-index:2;}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--tx-3);flex-wrap:wrap;margin-bottom:16px;}
.crumbs a{transition:color .2s ease;}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:var(--tx-3);opacity:.6;}
.crumbs .current{color:var(--tx-3);max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.hero-title{
  font-size:28px;font-weight:700;margin-bottom:12px;
}
@media(min-width:768px){.hero-title{font-size:36px;}}
@media(min-width:1024px){.hero-title{font-size:40px;}}
.hero-sub{color:var(--tx-2);font-size:15px;max-width:640px;line-height:1.8;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}

/* ============ 分类互链条 ============ */
.cat-bar{border-bottom:1px solid rgba(255,255,255,.07);background:rgba(8,13,26,.55);}
.cat-bar-inner{
  display:flex;gap:10px;padding:14px 0;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;
}
.cat-bar-inner::-webkit-scrollbar{display:none;}
.cat-pill{
  flex:0 0 auto;display:inline-flex;align-items:center;height:40px;padding:0 18px;
  border-radius:999px;font-size:14px;font-weight:600;color:var(--tx-2);
  background:var(--glass-bg);border:1px solid var(--glass-border);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.cat-pill:hover{color:var(--tx-1);border-color:rgba(255,181,71,.4);}
.cat-pill.is-active{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#1A1005;border-color:transparent;box-shadow:0 6px 18px -8px rgba(255,138,43,.7);
}

/* ============ sections ============ */
.section{padding:52px 0;}
@media(min-width:768px){.section{padding:72px 0;}}
@media(min-width:1024px){.section{padding:92px 0;}}
.section-head{margin-bottom:28px;}
.section-title{font-size:22px;font-weight:700;display:flex;align-items:center;gap:12px;}
.section-title::before{
  content:"";width:4px;height:20px;border-radius:2px;flex:0 0 4px;
  background:linear-gradient(180deg,var(--brand),var(--brand-deep));
  box-shadow:0 0 12px rgba(255,138,43,.55);
}
@media(min-width:768px){.section-title{font-size:28px;}}
.section-lead{color:var(--tx-2);font-size:14px;margin-top:10px;max-width:680px;}

/* ============ timeline ============ */
.steps-layout{display:grid;grid-template-columns:1fr;gap:26px;}
@media(min-width:1024px){.steps-layout{grid-template-columns:minmax(0,1fr) 320px;gap:36px;}}
.timeline{position:relative;padding-left:0;}
.step-item{position:relative;display:grid;grid-template-columns:56px 1fr;gap:16px;padding-bottom:26px;}
.step-item:last-child{padding-bottom:0;}
.step-item::before{
  content:"";position:absolute;left:27px;top:56px;bottom:6px;width:1px;
  background:linear-gradient(180deg,rgba(255,138,43,.5),rgba(255,138,43,.06));
}
.step-item:last-child::before{display:none;}
.step-num{
  width:56px;height:56px;border-radius:50%;display:grid;place-items:center;
  border:1px solid rgba(255,138,43,.5);background:rgba(255,138,43,.08);
  color:var(--brand-2);font-weight:800;font-size:17px;
  font-variant-numeric:tabular-nums;
  box-shadow:0 0 20px -8px rgba(255,138,43,.55);
}
.step-card{padding:20px 22px;}
.step-card h3{font-size:18px;font-weight:600;margin-bottom:8px;}
.step-card p{color:var(--tx-2);font-size:15px;line-height:1.75;}
.step-figure{
  margin-top:14px;border-radius:var(--r-md);overflow:hidden;position:relative;
  border:1px solid rgba(255,255,255,.08);background:linear-gradient(160deg,var(--bg-2),var(--bg-1));
}
.step-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease;}
.step-card:hover .step-figure img{transform:scale(1.04);}
.step-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}

/* ============ sticky 速览卡 ============ */
.aside-sticky{position:relative;}
@media(min-width:1024px){.aside-sticky{position:sticky;top:88px;align-self:start;}}
.quick-card{padding:22px;}
.quick-card h3{font-size:17px;font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.quick-list li{
  display:flex;gap:10px;font-size:14px;color:var(--tx-2);line-height:1.7;
  padding:10px 0;border-bottom:1px dashed rgba(255,255,255,.08);
}
.quick-list li:last-child{border-bottom:none;}
.quick-list .dot{
  width:6px;height:6px;border-radius:50%;background:var(--cyan);flex:0 0 6px;margin-top:9px;
  box-shadow:0 0 8px rgba(56,225,255,.7);
}
.anchor-nav{margin:18px 0;display:flex;flex-direction:column;gap:8px;}
.anchor-nav a{
  display:flex;align-items:center;justify-content:space-between;
  height:44px;padding:0 14px;border-radius:var(--r-md);font-size:14px;color:var(--tx-2);
  background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.07);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.anchor-nav a:hover{color:var(--tx-1);border-color:rgba(255,181,71,.4);background:rgba(255,138,43,.07);}
.anchor-nav a span.arw{color:var(--brand);}

/* ============ 准备清单 2+1 ============ */
.prep-grid{display:grid;grid-template-columns:1fr;gap:18px;}
@media(min-width:900px){.prep-grid{grid-template-columns:1.15fr .85fr;gap:20px;}}
.prep-main{padding:26px;}
.prep-main h3{font-size:19px;margin-bottom:12px;}
.prep-main p{color:var(--tx-2);font-size:15px;line-height:1.8;}
.prep-side{display:grid;gap:18px;}
.prep-mini{padding:20px 22px;}
.prep-mini h4{font-size:16px;font-weight:600;margin-bottom:8px;}
.prep-mini p{color:var(--tx-2);font-size:14px;line-height:1.75;}
.check-list{margin-top:14px;display:grid;gap:10px;}
.check-list li{display:flex;gap:10px;font-size:14px;color:var(--tx-2);}
.check-list svg{flex:0 0 18px;margin-top:4px;color:var(--ok);}

/* ============ FAQ ============ */
.faq-wrap{display:grid;gap:10px;}
details.faq-item{
  border-radius:var(--r-md);overflow:hidden;
  background:var(--glass-bg);border:1px solid var(--glass-border);
  transition:border-color .2s ease;
}
details.faq-item[open]{border-color:rgba(255,181,71,.34);}
details.faq-item summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 18px;font-size:16px;font-weight:600;cursor:pointer;
  min-height:44px;
}
details.faq-item summary::-webkit-details-marker{display:none;}
.faq-icon{
  flex:0 0 22px;width:22px;height:22px;position:relative;color:var(--brand);
  transition:transform .2s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:currentColor;border-radius:2px;
}
.faq-icon::before{left:4px;right:4px;top:10px;height:2px;}
.faq-icon::after{top:4px;bottom:4px;left:10px;width:2px;transition:opacity .2s ease;}
details[open] .faq-icon{transform:rotate(180deg);}
details[open] .faq-icon::after{opacity:0;}
.faq-body{
  padding:0 18px 18px;color:var(--tx-2);font-size:15px;line-height:1.8;
  background:rgba(255,255,255,.03);
  margin:0;
}
.faq-body p{padding-top:14px;}

/* ============ 互链带 ============ */
.cross-grid{display:grid;grid-template-columns:1fr;gap:18px;}
@media(min-width:768px){.cross-grid{grid-template-columns:repeat(3,1fr);}}
.cross-card{display:block;padding:0;overflow:hidden;}
.cross-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;}
.cross-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.cross-card:hover .thumb img{transform:scale(1.05);}
.cross-card .thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,8,15,.1),rgba(5,8,15,.82));
}
.cross-card .body{padding:18px 20px 22px;}
.cross-card h3{font-size:18px;font-weight:600;margin:10px 0 8px;transition:color .2s ease;}
.cross-card:hover h3{color:var(--brand);}
.cross-card p{font-size:14px;color:var(--tx-2);line-height:1.7;}

/* ============ CTA 带 ============ */
.cta-band{
  padding:30px 24px;text-align:center;position:relative;overflow:hidden;
  background:radial-gradient(600px 240px at 50% 0%,rgba(255,138,43,.16),transparent 70%),var(--glass-bg);
}
@media(min-width:768px){.cta-band{padding:44px 40px;}}
.cta-band h2{font-size:22px;margin-bottom:10px;}
@media(min-width:768px){.cta-band h2{font-size:30px;}}
.cta-band p{color:var(--tx-2);font-size:15px;max-width:620px;margin:0 auto;}
.cta-band .cta-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:22px;}

/* ============ footer ============ */
.site-footer{
  background:#04070F;position:relative;margin-top:8px;
  border-top:1px solid rgba(255,255,255,.06);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,181,71,.75),transparent);
}
.footer-grid{
  display:grid;grid-template-columns:1fr;gap:28px;
  padding-top:48px;padding-bottom:32px;
}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px;}}
.footer-brand .logo{margin-bottom:14px;}
.footer-brand p{color:var(--tx-3);font-size:13px;line-height:1.8;max-width:340px;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--tx-1);margin-bottom:14px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:13px;color:var(--tx-3);transition:color .2s ease;}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.06);
  padding:18px 16px 100px;
  display:flex;flex-wrap:wrap;gap:8px;justify-content:space-between;
}
@media(min-width:768px){.footer-bottom{padding:18px 24px 24px;}}
.footer-bottom p{font-size:12px;color:var(--tx-3);line-height:1.7;}

/* ============ 移动底部 Tab ============ */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:grid;grid-template-columns:repeat(5,1fr);
  background:rgba(8,13,26,.86);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-top:1px solid rgba(255,255,255,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
@media(min-width:640px){.mobile-tab{display:none;}}
.mobile-tab a{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;padding:8px 2px 7px;font-size:11px;color:var(--tx-3);min-height:56px;
}
.mobile-tab a svg{width:22px;height:22px;transition:transform .2s ease;}
.mobile-tab a.is-active{color:var(--brand);}
.mobile-tab a.is-active svg{transform:translateY(-2px);}
.mobile-tab a.is-active::before{
  content:"";position:absolute;top:0;width:24px;height:2px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 12px rgba(255,138,43,.9);
}
body{padding-bottom:76px;}
@media(min-width:640px){body{padding-bottom:0;}}

/* 图片占位 */
.img-ph{background:linear-gradient(160deg,var(--bg-2),var(--bg-1));}

/* roulang page: article */
:root{
  --bg-0:#05080F; --bg-1:#0A1020; --bg-2:#101A31;
  --brand:#FF8A2B; --brand-2:#FFB547; --brand-deep:#C95A10;
  --cyan:#38E1FF; --ok:#3DDC97; --warn:#FFC24B; --danger:#FF4D6D;
  --tx-1:#F2F5FF; --tx-2:#A9B6D4; --tx-3:#6C7A9B;
  --glass:rgba(20,30,54,.55);
  --glass-2:rgba(255,255,255,.03);
  --line:rgba(255,255,255,.09);
  --line-soft:rgba(255,255,255,.06);
  --r-lg:18px; --r-md:12px; --r-sm:8px; --r-pill:999px;
  --shadow:0 10px 30px -14px rgba(0,0,0,.65);
  --shadow-hi:0 20px 44px -18px rgba(0,0,0,.8);
  --glow-brand:0 8px 26px -8px rgba(255,138,43,.6), 0 0 0 1px rgba(255,138,43,.45);
  --glow-cyan:0 0 18px -2px rgba(56,225,255,.35);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;background:var(--bg-0);color:var(--tx-1);font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden;}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(680px 420px at 4% -4%, rgba(255,138,43,.10), transparent 62%),
    radial-gradient(720px 460px at 102% 106%, rgba(56,225,255,.07), transparent 64%),
    linear-gradient(180deg,var(--bg-0),var(--bg-1) 42%,var(--bg-0));
}
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:56px 56px;}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.3;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.sec{padding:88px 0;position:relative;z-index:1;}
.sec-sm{padding:56px 0;}
.sec-title{font-size:30px;font-weight:700;letter-spacing:-.01em;}
.sec-sub{color:var(--tx-2);font-size:15px;margin-top:10px;max-width:640px;}
.bar-title{display:flex;align-items:center;gap:12px;}
.bar-title::before{content:"";width:4px;height:20px;border-radius:2px;background:linear-gradient(180deg,var(--brand),var(--brand-deep));box-shadow:0 0 12px rgba(255,138,43,.5);}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;color:var(--cyan);text-transform:uppercase;}
.eyebrow span{width:22px;height:1px;background:linear-gradient(90deg,var(--cyan),transparent);display:inline-block;}

/* ===== header / nav ===== */
.site-header{position:sticky;top:0;z-index:60;background:rgba(6,10,20,.55);backdrop-filter:blur(12px) saturate(120%);-webkit-backdrop-filter:blur(12px);transition:background .25s ease,box-shadow .25s ease;}
.site-header.is-scrolled{background:rgba(6,10,20,.88);box-shadow:0 1px 0 rgba(255,255,255,.08);}
.header-inner{height:68px;display:flex;align-items:center;gap:24px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-deep));color:#1A1005;font-weight:800;font-size:16px;box-shadow:0 8px 20px -10px rgba(255,138,43,.85);clip-path:polygon(16% 0,100% 0,100% 84%,84% 100%,0 100%,0 16%);}
.logo-text{font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap;}
.logo-text .hl{background:linear-gradient(135deg,var(--brand-2),var(--brand));-webkit-background-clip:text;background-clip:text;color:transparent;}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{position:relative;font-size:15px;color:var(--tx-2);padding:8px 12px;border-radius:8px;line-height:1.4;}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--brand-2));box-shadow:0 0 10px rgba(255,138,43,.7);transform:scaleX(0);transform-origin:left;transition:transform .2s ease;}
.nav-link:hover{color:var(--tx-1);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--tx-1);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.link-quiet{font-size:14px;color:var(--tx-2);padding:8px 4px;}
.link-quiet:hover{color:var(--cyan);}
.hamburger{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);align-items:center;justify-content:center;background:rgba(255,255,255,.04);}
.hamburger span{display:block;width:18px;height:2px;background:var(--tx-1);border-radius:2px;position:relative;}
.hamburger span::before,.hamburger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--tx-1);border-radius:2px;}
.hamburger span::before{top:-6px;}
.hamburger span::after{top:6px;}
.drawer{display:none;border-top:1px solid var(--line-soft);background:rgba(10,16,32,.96);backdrop-filter:blur(14px);}
.drawer.is-open{display:block;}
.drawer-link{display:flex;align-items:center;justify-content:space-between;min-height:52px;padding:0 24px;color:var(--tx-2);font-size:16px;border-bottom:1px solid var(--line-soft);}
.drawer-link:hover,.drawer-link.is-active{color:var(--tx-1);background:rgba(255,255,255,.03);}
.drawer-link.is-active{color:var(--brand);}
.drawer-cta{padding:18px 24px 24px;}

/* ===== buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:12px;font-size:15px;font-weight:600;letter-spacing:.02em;padding:13px 24px;min-height:48px;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;white-space:nowrap;}
.btn-primary{background:linear-gradient(135deg,var(--brand-2),var(--brand) 55%,var(--brand-deep));color:#1A1005;box-shadow:var(--glow-brand);}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 12px 30px -8px rgba(255,138,43,.7),0 0 0 1px rgba(255,138,43,.55);}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px -8px rgba(255,138,43,.6);}
.btn-secondary{background:transparent;border:1px solid rgba(255,255,255,.18);color:var(--tx-1);}
.btn-secondary:hover{border-color:var(--brand);background:rgba(255,138,43,.08);}
.btn-sm{padding:9px 16px;min-height:40px;font-size:14px;border-radius:10px;}
.btn-full{width:100%;}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-size:14px;font-weight:600;}
.link-arrow svg{transition:transform .2s ease;}
.link-arrow:hover{color:var(--brand);}
.link-arrow:hover svg{transform:translateX(3px);}

/* ===== badges / chips ===== */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;letter-spacing:.02em;padding:5px 11px;border-radius:8px;line-height:1.4;}
.badge-cyan{background:rgba(56,225,255,.12);color:var(--cyan);border:1px solid rgba(56,225,255,.24);}
.badge-brand{background:linear-gradient(135deg,var(--brand-2),var(--brand));color:#1A1005;font-weight:600;}
.badge-ok{border:1px solid rgba(61,220,151,.5);color:var(--ok);background:rgba(61,220,151,.08);}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;}
.chip{display:inline-flex;align-items:center;min-height:34px;padding:6px 14px;border-radius:var(--r-pill);border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--tx-2);font-size:13px;}
.chip:hover{color:var(--tx-1);border-color:rgba(255,138,43,.5);background:rgba(255,138,43,.08);}
.chip.is-current{background:linear-gradient(135deg,var(--brand-2),var(--brand));color:#1A1005;border-color:transparent;font-weight:600;}

/* ===== breadcrumb ===== */
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--tx-3);min-width:0;}
.crumb a{color:var(--tx-2);white-space:nowrap;}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--tx-3);opacity:.7;}
.crumb .now{color:var(--tx-3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:46ch;}

/* ===== article head ===== */
.article-top{position:relative;overflow:hidden;border-bottom:1px solid var(--line-soft);}
.article-top .bg{position:absolute;inset:0;background-image:url(/assets/images/backpic/back-1.webp);background-size:cover;background-position:center;opacity:.34;}
.article-top::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,8,15,.72),rgba(10,16,32,.94) 62%,var(--bg-1));}
.article-top .inner{position:relative;z-index:2;padding:26px 0 46px;}
.article-head{margin-top:22px;max-width:860px;}
.article-head h1{font-size:38px;font-weight:700;letter-spacing:-.01em;margin-top:16px;overflow-wrap:break-word;}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;margin-top:18px;font-size:13px;color:var(--tx-3);}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--tx-3);opacity:.6;}
.cover{margin-top:30px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:linear-gradient(135deg,var(--bg-2),var(--bg-1));}
.cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}

/* ===== layout ===== */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 328px;gap:44px;align-items:start;padding:56px 0 88px;position:relative;z-index:1;}
.article-body{max-width:780px;font-size:16px;line-height:1.9;color:var(--tx-2);overflow-wrap:break-word;}
.article-body>*+*{margin-top:1.2em;}
.article-body h2{font-size:26px;font-weight:700;color:var(--tx-1);margin-top:2.1em;padding-left:16px;position:relative;line-height:1.45;}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;width:4px;height:1.1em;border-radius:2px;background:linear-gradient(180deg,var(--brand),var(--brand-deep));box-shadow:0 0 10px rgba(255,138,43,.5);}
.article-body h3{font-size:19px;font-weight:600;color:var(--tx-1);margin-top:1.8em;}
.article-body h4{font-size:17px;font-weight:600;color:var(--tx-1);margin-top:1.6em;}
.article-body p{color:var(--tx-2);}
.article-body strong{color:var(--tx-1);}
.article-body a{color:var(--cyan);border-bottom:1px solid rgba(56,225,255,.35);}
.article-body a:hover{color:var(--brand);border-color:rgba(255,138,43,.6);}
.article-body ul{display:grid;gap:10px;}
.article-body ul>li{position:relative;padding-left:22px;}
.article-body ul>li::before{content:"";position:absolute;left:2px;top:.72em;width:8px;height:8px;border-radius:2px;background:linear-gradient(135deg,var(--brand-2),var(--brand));}
.article-body ol{list-style:none;counter-reset:lit;display:grid;gap:10px;}
.article-body ol>li{position:relative;padding-left:34px;counter-increment:lit;}
.article-body ol>li::before{content:counter(lit);position:absolute;left:0;top:.35em;width:22px;height:22px;border-radius:50%;border:1px solid rgba(255,138,43,.6);color:var(--brand-2);font-size:12px;font-weight:700;display:grid;place-items:center;line-height:1;}
.article-body blockquote{margin:1.6em 0;padding:18px 22px;background:var(--glass);border:1px solid var(--line);border-left:3px solid var(--cyan);border-radius:var(--r-md);color:var(--tx-2);}
.article-body img{border-radius:var(--r-md);margin:1.6em auto;box-shadow:var(--shadow);}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:13px;color:var(--tx-3);text-align:center;margin-top:10px;}
.article-body table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;font-size:15px;margin:1.6em 0;background:rgba(255,255,255,.02);border-radius:var(--r-md);}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line-soft);text-align:left;white-space:nowrap;}
.article-body th{color:var(--tx-1);font-weight:600;border-bottom:1px solid var(--line);}
.article-body hr{border:0;border-top:1px solid var(--line-soft);margin:2em 0;}
.empty-box{padding:44px 28px;border:1px dashed var(--line);border-radius:var(--r-lg);background:var(--glass);text-align:center;}
.empty-box .icon{width:54px;height:54px;margin:0 auto 16px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--bg-2),var(--bg-1));border:1px solid var(--line);color:var(--brand);}
.empty-box h3{font-size:20px;color:var(--tx-1);}
.empty-box p{color:var(--tx-2);font-size:14px;margin-top:10px;}

/* ===== inline cta ===== */
.inline-cta{margin:2.4em 0;display:flex;flex-wrap:wrap;align-items:center;gap:16px;justify-content:space-between;padding:22px 24px;border-radius:var(--r-lg);background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(14px) saturate(120%);box-shadow:inset 0 1px 0 rgba(255,255,255,.14);}
.inline-cta h4{font-size:17px;color:var(--tx-1);}
.inline-cta p{font-size:13px;color:var(--tx-3);margin-top:6px;}

/* ===== side ===== */
.side{position:sticky;top:88px;display:grid;gap:20px;}
.side-card{padding:24px;border-radius:var(--r-lg);background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(14px) saturate(120%);box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow);}
.side-card.glow{background:linear-gradient(140deg,rgba(255,138,43,.14),rgba(20,30,54,.6));}
.side-title{font-size:15px;font-weight:600;color:var(--tx-1);display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.side-title::before{content:"";width:4px;height:16px;border-radius:2px;background:linear-gradient(180deg,var(--brand),var(--brand-deep));}
.side-card p.lead{font-size:14px;color:var(--tx-2);line-height:1.8;}
.side-list{display:grid;gap:12px;}
.side-list.mid{display:grid;gap:12px;}
.side-list .num{font-size:12px;font-weight:700;color:var(--brand-2);letter-spacing:.08em;}
.side-list .txt{font-size:13px;color:var(--tx-2);line-height:1.6;}
.side-list li{display:flex;gap:10px;align-items:flex-start;}
.rel-list{display:grid;gap:2px;}
.rel-list li{border-bottom:1px solid var(--line-soft);}
.rel-list li:last-child{border-bottom:0;}
.rel-list a{display:block;padding:11px 0;font-size:14px;color:var(--tx-2);line-height:1.6;}
.rel-list a:hover{color:var(--brand);}
.rel-list .meta{display:block;font-size:12px;color:var(--tx-3);margin-top:4px;}

/* ===== article footer ===== */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:44px;padding-top:32px;border-top:1px solid var(--line-soft);}
.note-card{margin-top:26px;padding:20px 22px;border-radius:var(--r-md);background:var(--glass);border:1px solid var(--line);border-left:3px solid var(--cyan);box-shadow:inset 0 1px 0 rgba(255,255,255,.14);}
.note-card strong{display:block;font-size:14px;color:var(--tx-1);margin-bottom:6px;}
.note-card p{font-size:13px;color:var(--tx-3);line-height:1.8;}
.rel-block{margin-top:52px;}
.rel-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:20px;margin-top:20px;}
.rel-card{display:flex;flex-direction:column;border-radius:var(--r-lg);overflow:hidden;background:var(--glass);border:1px solid var(--line);box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow);transition:transform .3s ease,border-color .3s ease;}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(255,138,43,.45);}
.rel-card .thumb{aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,var(--bg-2),var(--bg-1));}
.rel-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.rel-card:hover .thumb img{transform:scale(1.04);}
.rel-card .body{padding:20px 22px 22px;}
.rel-card h3{font-size:18px;font-weight:600;color:var(--tx-1);}
.rel-card:hover h3{color:var(--brand);}
.rel-card p{font-size:14px;color:var(--tx-3);margin-top:8px;line-height:1.7;}
.rel-side{display:grid;gap:20px;}
.rel-side .rel-card h3{font-size:16px;}
.back-row{margin-top:36px;}

/* ===== footer ===== */
.site-footer{position:relative;z-index:1;background:#04070F;border-top:1px solid var(--line-soft);margin-top:20px;}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(255,138,43,.85),transparent);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:64px 24px 44px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:13px;color:var(--tx-3);line-height:1.9;max-width:340px;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--tx-1);margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:13px;color:var(--tx-3);}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;padding:20px 24px 28px;border-top:1px solid var(--line-soft);font-size:12px;color:var(--tx-3);}

/* ===== mobile tab ===== */
.mobile-tab{display:none;}
@media (max-width:639px){
  .mobile-tab{display:block;position:fixed;left:0;right:0;bottom:0;z-index:70;background:rgba(8,13,26,.86);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-top:1px solid rgba(255,255,255,.08);padding-bottom:env(safe-area-inset-bottom);}
  .mobile-tab .tab-inner{display:grid;grid-template-columns:repeat(5,1fr);}
  .tab-item{position:relative;min-height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:var(--tx-3);font-size:11px;padding:8px 2px;}
  .tab-item svg{width:22px;height:22px;stroke-width:1.6;transition:transform .2s ease;}
  .tab-item.is-active{color:var(--brand);}
  .tab-item.is-active svg{transform:translateY(-2px);}
  .tab-item.is-active::before{content:"";position:absolute;top:0;width:24px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--brand-2));box-shadow:0 0 10px rgba(255,138,43,.8);}
  body{padding-bottom:80px;}
}

/* ===== responsive ===== */
@media (max-width:1023px){
  .layout{grid-template-columns:minmax(0,1fr);gap:36px;padding:40px 0 64px;}
  .side{position:static;grid-template-columns:1fr;order:2;}
  .article-body{max-width:none;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .rel-grid{grid-template-columns:1fr;}
}
@media (max-width:900px){
  .main-nav{display:none;}
  .hamburger{display:inline-flex;}
  .header-actions .link-quiet{display:none;}
}
@media (max-width:640px){
  .container{padding:0 16px;}
  .sec{padding:56px 0;}
  .article-top .inner{padding:18px 0 34px;}
  .article-head h1{font-size:27px;}
  .article-body{font-size:15.5px;line-height:1.85;}
  .article-body h2{font-size:22px;}
  .article-body h3{font-size:17px;}
  .logo-text{font-size:15px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:48px 16px 32px;}
  .footer-bottom{padding:18px 16px 24px;}
  .rel-card .body{padding:16px 18px 20px;}
  .crumb .now{max-width:20ch;}
  .btn{padding:12px 20px;}
}

/* roulang page: category2 */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1020;
  --bg-2:#101A31;
  --brand:#FF8A2B;
  --brand-2:#FFB547;
  --brand-deep:#C95A10;
  --cyan:#38E1FF;
  --ok:#3DDC97;
  --warn:#FFC24B;
  --danger:#FF4D6D;
  --tx-1:#F2F5FF;
  --tx-2:#A9B6D4;
  --tx-3:#6C7A9B;
  --glass:rgba(20,30,54,.55);
  --line:rgba(255,255,255,.09);
  --line-soft:rgba(255,255,255,.06);
  --r-lg:18px;
  --r-md:12px;
  --r-sm:8px;
  --shadow:0 10px 30px -14px rgba(0,0,0,.65);
  --shadow-hover:0 22px 44px -18px rgba(0,0,0,.8);
  --ease:cubic-bezier(.4,.2,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--tx-1);
  background:
    radial-gradient(900px 620px at 6% -8%, rgba(255,138,43,.08), transparent 62%),
    radial-gradient(880px 640px at 102% 100%, rgba(56,225,255,.06), transparent 62%),
    linear-gradient(180deg,var(--bg-0) 0%,var(--bg-1) 42%,var(--bg-0) 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(circle at 50% 22%, #000 0%, transparent 78%);
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
[id]{scroll-margin-top:96px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:92px 0;position:relative;z-index:1}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(6,10,20,.55);
  backdrop-filter:blur(12px) saturate(120%);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,10,20,.88);
  border-bottom-color:rgba(255,255,255,.08);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:68px;
}
.logo{display:inline-flex;align-items:center;gap:10px;min-width:0}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  clip-path:polygon(22% 0,100% 0,78% 100%,0 100%);
  color:#1A1005;font-weight:800;font-size:17px;
  box-shadow:0 6px 18px -8px rgba(255,138,43,.85);
}
.logo-text{
  font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--tx-1);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.logo-text .hl{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;
  display:inline-flex;align-items:center;
  height:68px;padding:0 13px;
  font-size:15px;color:var(--tx-2);
  transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:16px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  box-shadow:0 0 10px rgba(255,138,43,.75);
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--tx-1)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--tx-1);font-weight:600}
.header-actions{display:flex;align-items:center;gap:12px}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;color:var(--cyan);
  transition:color .2s var(--ease);
}
.btn-text span[aria-hidden]{transition:transform .2s var(--ease)}
.btn-text:hover{color:var(--brand)}
.btn-text:hover span[aria-hidden]{transform:translateX(3px)}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:var(--r-md);
  border:1px solid var(--line);color:var(--tx-1);
  background:rgba(255,255,255,.03);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(255,138,43,.55);background:rgba(255,138,43,.08)}
.mobile-drawer{
  display:none;
  border-top:1px solid var(--line-soft);
  background:rgba(8,13,26,.96);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  padding:10px 24px 20px;
}
.mobile-drawer.is-open{display:block}
.mobile-drawer a{
  display:flex;align-items:center;
  height:52px;font-size:15px;color:var(--tx-2);
  border-bottom:1px solid var(--line-soft);
}
.mobile-drawer a:last-of-type{border-bottom:0}
.mobile-drawer a.is-active{color:var(--brand);font-weight:600}
.mobile-drawer .drawer-cta{margin-top:12px;width:100%}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-md);
  font-size:15px;font-weight:600;letter-spacing:.02em;white-space:nowrap;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),
             background .18s var(--ease),border-color .18s var(--ease),filter .18s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#1A1005;
  box-shadow:0 8px 26px -8px rgba(255,138,43,.6),0 0 0 1px rgba(255,138,43,.45);
}
.btn-primary:hover{
  transform:translateY(-1px);filter:brightness(1.06);
  box-shadow:0 14px 32px -8px rgba(255,138,43,.72),0 0 0 1px rgba(255,138,43,.62);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px -10px rgba(255,138,43,.8)}
.btn-outline{
  background:transparent;border:1px solid rgba(255,255,255,.18);color:var(--tx-1);
}
.btn-outline:hover{border-color:var(--brand);background:rgba(255,138,43,.08)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:5px;
  height:26px;padding:0 10px;border-radius:var(--r-sm);
  font-size:12px;letter-spacing:.02em;font-weight:600;
  border:1px solid transparent;
}
.badge-brand{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#1A1005}
.badge-cyan{background:rgba(56,225,255,.14);color:var(--cyan);border-color:rgba(56,225,255,.32)}
.badge-ok{background:rgba(61,220,151,.14);color:var(--ok);border-color:rgba(61,220,151,.36)}
.badge-warn{background:rgba(255,194,75,.14);color:var(--warn);border-color:rgba(255,194,75,.34)}
.badge-mute{background:rgba(255,255,255,.05);color:var(--tx-2);border-color:var(--line)}

/* ---------- countdown bar ---------- */
.countdown-bar{
  position:relative;z-index:1;
  border-top:1px solid rgba(255,138,43,.22);
  border-bottom:1px solid rgba(255,138,43,.22);
  background:
    linear-gradient(90deg,rgba(255,138,43,.12),rgba(5,8,15,.6) 42%,rgba(56,225,255,.08)),
    rgba(5,8,15,.72);
}
.cd-inner{
  display:flex;align-items:center;gap:16px;
  min-height:52px;
  padding-top:8px;padding-bottom:8px;
}
.cd-text{font-size:14px;color:var(--tx-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cd-clock{display:flex;align-items:center;gap:8px;margin-left:auto}
.cd-block{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  width:38px;height:44px;border-radius:var(--r-sm);
  background:rgba(0,0,0,.35);
  border:1px solid rgba(255,138,43,.35);
}
.cd-block b{
  font-size:17px;font-weight:800;color:var(--brand-2);
  font-variant-numeric:tabular-nums;line-height:1.1;
}
.cd-block i{font-size:10px;font-style:normal;color:var(--tx-3);line-height:1.2}
.cd-link{font-size:13px;white-space:nowrap}

/* ---------- page hero ---------- */
.page-hero{position:relative;z-index:1;overflow:hidden;border-bottom:1px solid var(--line-soft)}
.page-hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  filter:saturate(.85);
}
.page-hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(5,8,15,.72) 0%,rgba(5,8,15,.86) 62%,var(--bg-1) 100%),
    radial-gradient(700px 400px at 12% 0%, rgba(255,138,43,.16), transparent 66%);
}
.page-hero-inner{position:relative;z-index:2;padding-top:34px;padding-bottom:64px;max-width:840px}
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--tx-3);margin-bottom:22px}
.breadcrumb a{color:var(--tx-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--tx-3)}
.breadcrumb .current{color:var(--tx-3)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 12px;border-radius:999px;
  font-size:12px;letter-spacing:.04em;color:var(--cyan);
  background:rgba(56,225,255,.1);
  border:1px solid rgba(56,225,255,.3);
  box-shadow:0 0 18px -6px rgba(56,225,255,.5);
  margin-bottom:18px;
}
.page-hero h1{
  font-size:38px;font-weight:700;line-height:1.2;letter-spacing:-.01em;
  margin-bottom:14px;
}
.page-hero-sub{font-size:16px;color:var(--tx-2);max-width:640px;margin-bottom:24px}
.hero-chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  height:34px;padding:0 13px;border-radius:999px;
  font-size:13px;color:var(--tx-2);
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
}
.chip b{color:var(--tx-1);font-weight:600}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- category pills ---------- */
.cat-nav{padding:26px 0 0;position:relative;z-index:1}
.cat-pills{
  display:flex;gap:10px;overflow-x:auto;padding:6px 0 10px;
  scrollbar-width:none;-ms-overflow-style:none;
}
.cat-pills::-webkit-scrollbar{display:none}
.pill{
  flex:0 0 auto;
  display:inline-flex;align-items:center;
  height:40px;padding:0 18px;border-radius:999px;
  font-size:14px;color:var(--tx-2);
  background:rgba(255,255,255,.035);
  border:1px solid var(--line);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease),transform .2s var(--ease);
}
.pill:hover{color:var(--tx-1);border-color:rgba(255,138,43,.5);transform:translateY(-1px)}
.pill.is-active{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#1A1005;font-weight:600;border-color:transparent;
  box-shadow:0 8px 22px -10px rgba(255,138,43,.8);
}

/* ---------- section head ---------- */
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;margin-bottom:34px;
}
.section-title{font-size:30px;font-weight:700;line-height:1.25;letter-spacing:-.01em}
.section-sub{margin-top:10px;font-size:15px;color:var(--tx-2);max-width:620px}

/* ---------- glass card ---------- */
.glass-card{
  position:relative;overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow),inset 0 1px 0 rgba(255,255,255,.14);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.glass-card::after{
  content:"";position:absolute;top:0;left:-60%;width:42%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.1),transparent);
  transform:skewX(-16deg);opacity:0;pointer-events:none;
}
.glass-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,138,43,.38);
  box-shadow:var(--shadow-hover),inset 0 1px 0 rgba(255,255,255,.18);
}
.glass-card:hover::after{opacity:1;animation:sweep .4s var(--ease)}
@keyframes sweep{from{left:-60%}to{left:120%}}

/* ---------- activity cards ---------- */
.activity-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.activity-card{display:flex;flex-direction:column}
.card-media{position:relative;overflow:hidden;border-radius:14px;margin:16px 16px 0}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s var(--ease)}
.activity-card:hover .card-media img{transform:scale(1.04)}
.card-media .badge{position:absolute;top:12px;left:12px}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:19px;font-weight:600;line-height:1.4;margin-bottom:8px}
.card-body > p{font-size:14px;line-height:1.7;color:var(--tx-2);margin-bottom:4px}
.meta-list{display:flex;flex-direction:column;gap:2px;margin:16px 0 20px}
.meta-list li{
  display:flex;align-items:baseline;justify-content:space-between;gap:14px;
  font-size:13px;color:var(--tx-3);
  padding:9px 0;
  border-bottom:1px dashed var(--line-soft);
}
.meta-list li:last-child{border-bottom:0}
.meta-list b{color:var(--tx-2);font-weight:500;text-align:right}
.card-body .btn-block{margin-top:auto}

/* ---------- reward compare ---------- */
.reward-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
.reward-card{padding:26px 24px 28px;display:flex;flex-direction:column}
.reward-card.is-featured{
  border-color:rgba(255,138,43,.6);
  box-shadow:0 22px 50px -20px rgba(255,138,43,.5),inset 0 1px 0 rgba(255,255,255,.2);
  transform:translateY(-12px);
  background:linear-gradient(180deg,rgba(255,138,43,.1),rgba(20,30,54,.6) 42%);
}
.reward-card.is-featured:hover{transform:translateY(-16px)}
.reward-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.reward-card h3{font-size:20px;font-weight:600}
.reward-price{
  font-size:28px;font-weight:800;color:var(--brand-2);
  font-variant-numeric:tabular-nums;letter-spacing:-.01em;margin-bottom:4px;
}
.reward-price small{font-size:13px;font-weight:500;color:var(--tx-3);margin-left:6px}
.reward-desc{font-size:14px;color:var(--tx-2);line-height:1.7;margin-bottom:18px}
.reward-list{display:flex;flex-direction:column;gap:11px;margin-bottom:22px}
.reward-list li{display:flex;gap:10px;font-size:14px;line-height:1.7;color:var(--tx-2)}
.reward-list li::before{
  content:"";flex:0 0 6px;width:6px;height:6px;margin-top:9px;border-radius:2px;
  background:var(--brand);box-shadow:0 0 8px rgba(255,138,43,.6);
}
.reward-card .btn{margin-top:auto}

/* ---------- steps ---------- */
.step-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;position:relative}
.step-card{
  position:relative;
  padding:24px 22px 26px;
  border-radius:var(--r-lg);
  background:rgba(20,30,54,.5);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.1);
  transition:border-color .25s var(--ease),transform .25s var(--ease);
}
.step-card:hover{border-color:rgba(56,225,255,.42);transform:translateY(-3px)}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:50%;
  border:1px solid rgba(255,138,43,.62);
  color:var(--brand);font-weight:800;font-size:15px;
  font-variant-numeric:tabular-nums;
  box-shadow:0 0 18px -6px rgba(255,138,43,.7);
  margin-bottom:16px;
}
.step-card h3{font-size:17px;font-weight:600;margin-bottom:8px}
.step-card p{font-size:14px;line-height:1.7;color:var(--tx-2)}
.step-cta{margin-top:34px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.step-cta .hint{font-size:13px;color:var(--tx-3)}

/* ---------- faq ---------- */
.faq-wrap{max-width:880px}
.faq-group{margin-bottom:32px}
.faq-group h3{font-size:20px;font-weight:600;margin-bottom:16px}
.faq-item{
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:rgba(255,255,255,.025);
  margin-bottom:10px;
  overflow:hidden;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-item[open]{border-color:rgba(255,138,43,.4);background:rgba(255,138,43,.05)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:17px 20px;
  font-size:16px;font-weight:600;color:var(--tx-1);
  cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .mark{
  flex:0 0 22px;width:22px;height:22px;position:relative;
  transition:transform .2s var(--ease);
}
.faq-item summary .mark::before,
.faq-item summary .mark::after{
  content:"";position:absolute;top:50%;left:50%;background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-item summary .mark::before{width:14px;height:2px}
.faq-item summary .mark::after{width:2px;height:14px;transition:opacity .2s var(--ease)}
.faq-item[open] summary .mark{transform:rotate(45deg)}
.faq-item .faq-answer{
  padding:0 20px 18px;
  font-size:15px;line-height:1.8;color:var(--tx-2);
  border-top:1px solid var(--line-soft);
  margin-top:2px;padding-top:14px;
  background:rgba(255,255,255,.02);
}

/* ---------- cross links ---------- */
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cross-card{padding:26px 24px;display:flex;flex-direction:column;gap:12px}
.cross-card h3{font-size:18px;font-weight:600}
.cross-card p{font-size:14px;line-height:1.7;color:var(--tx-2)}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:24px;
  border:1px solid rgba(255,138,43,.34);
  background:
    radial-gradient(700px 320px at 12% 0%, rgba(255,138,43,.22), transparent 66%),
    radial-gradient(600px 300px at 96% 100%, rgba(56,225,255,.14), transparent 66%),
    rgba(12,19,38,.75);
  backdrop-filter:blur(16px) saturate(120%);
  -webkit-backdrop-filter:blur(16px) saturate(120%);
  box-shadow:0 28px 60px -28px rgba(255,138,43,.5);
  padding:48px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  flex-wrap:wrap;
}
.cta-band h2{font-size:28px;font-weight:700;line-height:1.3;margin-bottom:10px}
.cta-band p{font-size:15px;color:var(--tx-2);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- footer ---------- */
.site-footer{
  position:relative;z-index:1;
  background:#04070F;
  margin-top:20px;
  padding-top:64px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,138,43,.85),transparent);
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;
  padding-bottom:44px;
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:13px;line-height:1.85;color:var(--tx-3);max-width:340px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--tx-1);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:13px;color:var(--tx-3)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;
  padding-top:20px;padding-bottom:26px;
  border-top:1px solid var(--line-soft);
  font-size:12px;color:var(--tx-3);
}

/* ---------- bottom tab ---------- */
.bottom-tab{display:none}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .page-hero h1{font-size:34px}
}
@media (max-width:1023px){
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-text{display:none}
  .section{padding:72px 0}
  .section-title{font-size:26px}
  .activity-grid{grid-template-columns:1fr}
  .reward-grid{grid-template-columns:1fr;gap:16px}
  .reward-card.is-featured{transform:none}
  .reward-card.is-featured:hover{transform:translateY(-4px)}
  .step-strip{grid-template-columns:repeat(2,1fr)}
  .cross-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{padding:38px 30px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .page-hero h1{font-size:29px}
  .page-hero-inner{padding-bottom:48px}
  .section{padding:56px 0}
  .section-title{font-size:23px}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .cta-band h2{font-size:23px}
  .cta-band{padding:30px 22px}
  .cta-actions .btn{width:100%}
  .cd-clock{display:none}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:639px){
  body{padding-bottom:84px}
  .header-actions .btn-primary{display:none}
  .logo-text{font-size:15px}
  .step-strip{grid-template-columns:1fr}
  .page-hero-sub{font-size:15px}
  .hero-cta .btn{width:100%}
  .bottom-tab{
    display:flex;
    position:fixed;left:0;right:0;bottom:0;z-index:90;
    background:rgba(8,13,26,.86);
    backdrop-filter:blur(14px) saturate(120%);
    -webkit-backdrop-filter:blur(14px) saturate(120%);
    border-top:1px solid rgba(255,255,255,.08);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .tab-item{
    position:relative;flex:1;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    min-height:56px;padding:6px 2px;
    font-size:11px;color:var(--tx-3);
    transition:color .2s var(--ease);
  }
  .tab-item .tab-ico{transition:transform .2s var(--ease)}
  .tab-item.is-active{color:var(--brand)}
  .tab-item.is-active .tab-ico{transform:translateY(-2px)}
  .tab-item.is-active::before{
    content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
    width:24px;height:2px;border-radius:2px;background:var(--brand);
    box-shadow:0 0 10px rgba(255,138,43,.9);
  }
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}

/* roulang page: category3 */
:root{
  --bg-0:#05080F;
  --bg-1:#0A1020;
  --bg-2:#101A31;
  --brand:#FF8A2B;
  --brand-2:#FFB547;
  --brand-deep:#C95A10;
  --cyan:#38E1FF;
  --ok:#3DDC97;
  --warn:#FFC24B;
  --danger:#FF4D6D;
  --tx-1:#F2F5FF;
  --tx-2:#A9B6D4;
  --tx-3:#6C7A9B;
  --glass:rgba(20,30,54,.55);
  --glass-soft:rgba(255,255,255,.03);
  --line:rgba(255,255,255,.09);
  --line-soft:rgba(255,255,255,.06);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --r-lg:18px;
  --r-md:12px;
  --r-sm:8px;
  --shadow:0 10px 30px -14px rgba(0,0,0,.65);
  --shadow-hover:0 18px 40px -18px rgba(0,0,0,.8);
  --glow-brand:0 8px 26px -8px rgba(255,138,43,.6),0 0 0 1px rgba(255,138,43,.45);
  --glow-cyan:0 0 18px -2px rgba(56,225,255,.35);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
body.site{
  margin:0;
  padding:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--tx-1);
  background-color:var(--bg-0);
  background-image:
    radial-gradient(900px 620px at 4% -8%, rgba(255,138,43,.10), transparent 62%),
    radial-gradient(820px 640px at 100% 22%, rgba(56,225,255,.07), transparent 64%);
  background-attachment:fixed;
  min-height:100vh;
  overflow-x:hidden;
  -webkit-text-size-adjust:100%;
}
body.site::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size:58px 58px;
  -webkit-mask-image:radial-gradient(120% 80% at 50% 0%, #000 10%, transparent 78%);
  mask-image:radial-gradient(120% 80% at 50% 0%, #000 10%, transparent 78%);
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
  position:relative;
  z-index:1;
}
@media(min-width:768px){.container{padding-left:24px;padding-right:24px}}
@media(min-width:1200px){.container{padding-left:32px;padding-right:32px}}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(6,10,20,.55);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{
  background:rgba(6,10,20,.88);
  border-bottom-color:rgba(255,255,255,.08);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:18px;
  height:68px;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:34px;height:34px;
  display:grid;place-items:center;
  border-radius:10px 4px 10px 4px;
  background:linear-gradient(135deg,#FF8A2B,#FFB547);
  color:#1A1005;
  font-weight:800;
  font-size:17px;
  box-shadow:0 6px 18px -8px rgba(255,138,43,.75);
}
.logo-text{
  font-size:16px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--tx-1);
  white-space:nowrap;
}
.logo-text .hl{
  background:linear-gradient(135deg,#FF8A2B,#FFB547);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.main-nav{display:none;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:44px;
  padding:0 13px;
  font-size:15px;
  color:var(--tx-2);
  border-radius:10px;
  transition:color .2s ease,background .2s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:13px;right:13px;bottom:6px;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,#FF8A2B,#FFB547);
  box-shadow:0 0 10px -1px rgba(255,138,43,.8);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s ease;
}
.nav-link:hover{color:var(--tx-1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--tx-1)}
.nav-link.is-active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.main-nav + .header-actions{margin-left:14px}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 18px;
  border-radius:12px;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#FF8A2B,#FFB547);
  color:#1A1005;
  box-shadow:var(--glow-brand);
}
.btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 12px 30px -8px rgba(255,138,43,.7),0 0 0 1px rgba(255,138,43,.5)}
.btn-primary:active{transform:translateY(0);box-shadow:0 5px 16px -8px rgba(255,138,43,.7)}
.btn-outline{
  background:transparent;
  border:1px solid rgba(255,255,255,.18);
  color:var(--tx-1);
}
.btn-outline:hover{border-color:var(--brand);background:rgba(255,138,43,.08);transform:translateY(-1px)}
.btn-text{
  color:var(--cyan);
  padding:0 6px;
  font-weight:600;
}
.btn-text:hover{color:var(--brand)}
.btn-text .arrow{transition:transform .2s ease}
.btn-text:hover .arrow{transform:translateX(3px)}
.btn-block{width:100%}
.header-actions .btn-text{display:none}
.nav-toggle{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:44px;height:44px;
  border-radius:12px;
  border:1px solid var(--line);
  color:var(--tx-1);
  background:rgba(255,255,255,.04);
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.mobile-drawer{
  overflow:hidden;
  max-height:0;
  transition:max-height .3s ease;
  border-top:0 solid transparent;
  background:rgba(8,13,26,.94);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
}
.mobile-drawer.is-open{max-height:480px;border-top:1px solid var(--line)}
.mobile-drawer-inner{padding:12px 16px 20px;display:flex;flex-direction:column;gap:6px}
.drawer-link{
  display:flex;
  align-items:center;
  min-height:52px;
  padding:0 14px;
  border-radius:12px;
  color:var(--tx-2);
  font-size:15px;
  border:1px solid transparent;
}
.drawer-link:hover{background:rgba(255,255,255,.04);color:var(--tx-1)}
.drawer-link.is-active{
  color:var(--tx-1);
  border-color:rgba(255,138,43,.4);
  background:rgba(255,138,43,.08);
}
.mobile-drawer .btn-primary{margin-top:8px}
@media(min-width:1024px){
  .main-nav{display:flex}
  .nav-toggle{display:none}
  .mobile-drawer{display:none}
}
@media(min-width:768px){
  .header-actions .btn-text{display:inline-flex}
}

/* ============ 页头 ============ */
.page-hero{
  position:relative;
  padding:56px 0 48px;
  overflow:hidden;
  border-bottom:1px solid var(--line-soft);
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  opacity:.42;
  z-index:0;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background:
    linear-gradient(180deg, rgba(5,8,15,.72) 0%, rgba(5,8,15,.86) 55%, var(--bg-1) 100%),
    radial-gradient(700px 380px at 12% 0%, rgba(255,138,43,.16), transparent 62%);
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--tx-3);
  margin-bottom:20px;
}
.breadcrumb a{color:var(--tx-2);transition:color .2s ease}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(255,255,255,.2)}
.breadcrumb .current{color:var(--tx-3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:220px}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--cyan);
  background:rgba(56,225,255,.1);
  border:1px solid rgba(56,225,255,.28);
  box-shadow:var(--glow-cyan);
  margin-bottom:18px;
}
.hero-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px rgba(56,225,255,.9)}
.page-hero h1{
  font-size:30px;
  line-height:1.2;
  font-weight:700;
  letter-spacing:-.01em;
  max-width:760px;
}
.page-hero .hero-sub{
  margin-top:14px;
  font-size:15px;
  line-height:1.8;
  color:var(--tx-2);
  max-width:680px;
}
.hero-facts{
  margin-top:28px;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
  max-width:760px;
}
.fact-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:16px 18px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
}
.fact-card .num{
  font-size:26px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
  color:var(--brand-2);
  line-height:1.1;
}
.fact-card .label{font-size:13px;color:var(--tx-3);margin-top:6px}
@media(min-width:768px){
  .page-hero{padding:72px 0 60px}
  .page-hero h1{font-size:36px}
  .page-hero .hero-sub{font-size:16px}
  .hero-facts{grid-template-columns:repeat(4,minmax(0,1fr))}
}

/* ============ 分类互链条 ============ */
.cat-bar{padding:22px 0 0}
.cat-pills{
  display:flex;
  gap:10px;
  overflow-x:auto;
  padding-bottom:6px;
  scrollbar-width:none;
}
.cat-pills::-webkit-scrollbar{display:none}
.pill{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 18px;
  border-radius:999px;
  font-size:14px;
  font-weight:600;
  white-space:nowrap;
  color:var(--tx-2);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12);
  transition:color .2s ease,border-color .2s ease,transform .2s ease,background .2s ease;
}
.pill:hover{color:var(--tx-1);border-color:rgba(255,138,43,.45);transform:translateY(-1px)}
.pill.is-current{
  color:#1A1005;
  background:linear-gradient(135deg,#FF8A2B,#FFB547);
  border-color:transparent;
  box-shadow:var(--glow-brand);
}

/* ============ 通用区块 ============ */
.section{padding:56px 0}
.section-tight{padding:44px 0}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px;
  margin-bottom:28px;
}
.section-head h2{
  font-size:22px;
  font-weight:700;
  line-height:1.3;
  position:relative;
  padding-left:14px;
}
.section-head h2::before{
  content:"";
  position:absolute;
  left:0;top:4px;
  width:4px;height:20px;
  border-radius:2px;
  background:linear-gradient(180deg,#FF8A2B,#FFB547);
  box-shadow:0 0 10px -1px rgba(255,138,43,.8);
}
.section-head p{font-size:14px;color:var(--tx-3);max-width:640px}
@media(min-width:768px){
  .section{padding:88px 0}
  .section-tight{padding:56px 0}
  .section-head h2{font-size:28px}
  .section-head h2::before{height:24px;top:5px}
}

/* ============ 答疑布局 ============ */
.faq-layout{display:grid;grid-template-columns:1fr;gap:26px;align-items:start}
.toc-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:20px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
}
.toc-card h3{font-size:16px;font-weight:600;margin-bottom:14px;color:var(--tx-1)}
.toc-list{display:flex;flex-wrap:wrap;gap:8px}
.toc-list a{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  border-radius:10px;
  font-size:14px;
  color:var(--tx-2);
  background:rgba(255,255,255,.03);
  border:1px solid var(--line-soft);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.toc-list a:hover{color:var(--brand);border-color:rgba(255,138,43,.45);background:rgba(255,138,43,.08)}
.toc-note{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line-soft);
  font-size:13px;
  line-height:1.7;
  color:var(--tx-3);
}
.toc-cover{
  margin-top:16px;
  border-radius:var(--r-md);
  overflow:hidden;
  border:1px solid var(--line);
}
.toc-cover img{width:100%;height:132px;object-fit:cover;transition:transform .4s ease}
.toc-cover:hover img{transform:scale(1.04)}
@media(min-width:1024px){
  .faq-layout{grid-template-columns:268px minmax(0,1fr);gap:34px}
  .toc-card{position:sticky;top:96px}
  .toc-list{flex-direction:column;flex-wrap:nowrap}
  .toc-list a{width:100%}
}

.faq-group{margin-bottom:34px}
.faq-group:last-child{margin-bottom:0}
.faq-group > h3{
  font-size:19px;
  font-weight:600;
  margin-bottom:14px;
  display:flex;
  align-items:center;
  gap:10px;
}
.faq-group > h3 .g-badge{
  font-size:12px;
  font-weight:600;
  letter-spacing:.02em;
  color:var(--cyan);
  background:rgba(56,225,255,.1);
  border:1px solid rgba(56,225,255,.26);
  border-radius:8px;
  padding:3px 9px;
}
.faq-item{
  background:rgba(255,255,255,.025);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  margin-bottom:10px;
  overflow:hidden;
  transition:border-color .2s ease,background .2s ease;
}
.faq-item:hover{border-color:rgba(255,255,255,.18)}
.faq-item[open]{border-color:rgba(255,138,43,.4);background:rgba(255,138,43,.05)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  min-height:52px;
  padding:15px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:16px;
  font-weight:600;
  color:var(--tx-1);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";
  flex-shrink:0;
  width:22px;height:22px;
  display:grid;place-items:center;
  font-size:16px;
  font-weight:600;
  color:var(--brand);
  border:1px solid rgba(255,138,43,.4);
  border-radius:6px;
  line-height:1;
  transition:transform .2s ease,background .2s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg);background:rgba(255,138,43,.14)}
.faq-answer{
  padding:0 18px 18px;
  font-size:15px;
  line-height:1.8;
  color:var(--tx-2);
  background:rgba(255,255,255,.03);
}
.faq-answer strong{color:var(--brand-2);font-weight:600}

/* ============ 条款编号列表 ============ */
.clause-panel{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:24px 20px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
}
.clause-list{counter-reset:clause}
.clause-list li{
  counter-increment:clause;
  position:relative;
  padding:14px 0 14px 48px;
  font-size:15px;
  line-height:1.85;
  color:var(--tx-2);
  border-bottom:1px solid var(--line-soft);
}
.clause-list li:last-child{border-bottom:none;padding-bottom:4px}
.clause-list li::before{
  content:counter(clause,decimal-leading-zero);
  position:absolute;
  left:0;top:15px;
  width:32px;height:32px;
  display:grid;place-items:center;
  border-radius:10px;
  font-size:13px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
  color:var(--brand-2);
  background:rgba(255,138,43,.1);
  border:1px solid rgba(255,138,43,.32);
}
.clause-list li b{color:var(--tx-1);font-weight:600}
@media(min-width:768px){
  .clause-panel{padding:32px 30px}
  .clause-list li{font-size:16px;padding-left:56px}
}

/* ============ 提示卡 ============ */
.note-grid{display:grid;grid-template-columns:1fr;gap:18px}
.note-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-left:3px solid var(--cyan);
  border-radius:var(--r-md);
  padding:22px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12),var(--shadow);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.note-card:hover{transform:translateY(-4px);border-color:rgba(56,225,255,.4);box-shadow:var(--shadow-hover)}
.note-card h3{font-size:17px;font-weight:600;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.note-card h3 .tag{
  font-size:12px;
  font-weight:600;
  padding:2px 8px;
  border-radius:8px;
  color:#1A1005;
  background:linear-gradient(135deg,#FF8A2B,#FFB547);
}
.note-card p{font-size:14px;line-height:1.75;color:var(--tx-2)}
@media(min-width:768px){.note-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}

/* ============ 互链带 ============ */
.link-band-grid{display:grid;grid-template-columns:1fr;gap:18px}
.link-card{
  display:block;
  position:relative;
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.14),var(--shadow);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.link-card::after{
  content:"";
  position:absolute;
  top:0;left:-60%;
  width:45%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.1),transparent);
  transition:left .4s ease;
  pointer-events:none;
}
.link-card:hover{transform:translateY(-4px);border-color:rgba(255,138,43,.45);box-shadow:var(--shadow-hover)}
.link-card:hover::after{left:120%}
.link-card .thumb{width:100%;height:150px;object-fit:cover}
.link-card .body{padding:20px 22px 22px}
.link-card h3{font-size:18px;font-weight:600;margin-bottom:8px}
.link-card:hover h3{color:var(--brand)}
.link-card p{font-size:14px;line-height:1.7;color:var(--tx-2)}
.link-card .more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:14px;
  font-size:14px;
  font-weight:600;
  color:var(--cyan);
}
.link-card:hover .more{color:var(--brand)}
@media(min-width:768px){.link-band-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:32px 22px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.16),var(--shadow);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  backdrop-filter:blur(14px) saturate(120%);
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:-40% -10% auto -10%;
  height:340px;
  background:radial-gradient(520px 200px at 20% 40%, rgba(255,138,43,.22), transparent 68%);
  pointer-events:none;
}
.cta-band .inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr;gap:24px;align-items:center}
.cta-band h2{font-size:22px;font-weight:700;line-height:1.35}
.cta-band .cta-sub{margin-top:10px;font-size:15px;color:var(--tx-2);max-width:560px}
.cta-points{margin-top:16px;display:flex;flex-direction:column;gap:8px}
.cta-points li{
  display:flex;
  align-items:flex-start;
  gap:8px;
  font-size:14px;
  color:var(--tx-2);
}
.cta-points li::before{
  content:"";
  flex-shrink:0;
  width:6px;height:6px;
  margin-top:9px;
  border-radius:2px;
  background:linear-gradient(135deg,#FF8A2B,#FFB547);
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(min-width:992px){
  .cta-band{padding:44px 40px}
  .cta-band .inner{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr)}
  .cta-band h2{font-size:28px}
  .cta-actions{justify-content:flex-end}
}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  margin-top:40px;
  background:#04070F;
  border-top:1px solid var(--line-soft);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,138,43,.7),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:30px;
  padding-top:48px;
  padding-bottom:32px;
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:13.5px;line-height:1.8;color:var(--tx-3);max-width:420px}
.footer-col h4{font-size:14px;font-weight:600;color:var(--tx-1);margin-bottom:14px}
.footer-col li{margin-bottom:9px}
.footer-col a{font-size:13px;color:var(--tx-3);transition:color .2s ease}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding-top:20px;
  padding-bottom:20px;
  border-top:1px solid var(--line-soft);
}
.footer-bottom p{font-size:12px;color:var(--tx-3);line-height:1.7}
@media(min-width:768px){
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-top:64px;padding-bottom:40px}
  .footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;gap:24px}
}

/* ============ 移动端底部 Tab ============ */
.mobile-tabbar{display:none}
@media(max-width:639px){
  body.site{padding-bottom:88px}
  .mobile-tabbar{
    display:block;
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:70;
    background:rgba(8,13,26,.86);
    -webkit-backdrop-filter:blur(14px) saturate(120%);
    backdrop-filter:blur(14px) saturate(120%);
    border-top:1px solid rgba(255,255,255,.08);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .tabbar-inner{display:grid;grid-template-columns:repeat(5,1fr);}
  .tab-item{
    position:relative;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:3px;
    padding:8px 2px 7px;
    min-height:56px;
    font-size:11px;
    color:var(--tx-3);
    transition:color .2s ease;
  }
  .tab-item svg{width:22px;height:22px;transition:transform .2s ease}
  .tab-item.is-active{color:var(--brand)}
  .tab-item.is-active svg{transform:translateY(-2px)}
  .tab-item.is-active::before{
    content:"";
    position:absolute;
    top:0;
    width:24px;height:2px;
    border-radius:2px;
    background:linear-gradient(90deg,#FF8A2B,#FFB547);
    box-shadow:0 0 10px -1px rgba(255,138,43,.9);
  }
  .footer-bottom{padding-bottom:8px}
}
@media(min-width:640px){
  .mobile-tabbar{display:none}
}

/* 锚点偏移 */
[id]{scroll-margin-top:88px}

/* roulang page: category4 */
:root{
    --bg-0:#05080F; --bg-1:#0A1020; --bg-2:#101A31;
    --brand:#FF8A2B; --brand-2:#FFB547; --brand-deep:#C95A10;
    --cyan:#38E1FF; --ok:#3DDC97; --warn:#FFC24B; --danger:#FF4D6D;
    --tx-1:#F2F5FF; --tx-2:#A9B6D4; --tx-3:#6C7A9B;
    --glass:rgba(20,30,54,.55); --line:rgba(255,255,255,.09);
    --r-lg:18px; --r-md:12px; --r-sm:8px;
    --shadow:0 10px 30px -14px rgba(0,0,0,.65);
    --glow-brand:0 8px 26px -8px rgba(255,138,43,.6), 0 0 0 1px rgba(255,138,43,.45);
    --glow-cyan:0 0 18px -2px rgba(56,225,255,.35);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
    font-size:16px; line-height:1.75; color:var(--tx-1);
    background:
      radial-gradient(900px 520px at 6% -6%, rgba(255,138,43,.08), transparent 62%),
      radial-gradient(760px 460px at 104% 106%, rgba(56,225,255,.06), transparent 60%),
      var(--bg-0);
    overflow-x:hidden;
  }
  body::before{
    content:""; position:fixed; inset:0; z-index:0; pointer-events:none;
    background-image:
      linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
    background-size:56px 56px;
    -webkit-mask-image:radial-gradient(120% 88% at 50% 0%, #000 34%, transparent 78%);
    mask-image:radial-gradient(120% 88% at 50% 0%, #000 34%, transparent 78%);
  }
  img{max-width:100%;display:block;border-style:none}
  a{color:inherit;text-decoration:none}
  button{font:inherit;color:inherit;cursor:pointer;border:none;background:none}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(6,10,20,.55);
    backdrop-filter:blur(12px) saturate(120%);
    -webkit-backdrop-filter:blur(12px) saturate(120%);
    border-bottom:1px solid transparent;
    transition:background .25s ease, border-color .25s ease;
  }
  .site-header.is-scrolled{background:rgba(6,10,20,.88);border-bottom-color:rgba(255,255,255,.08)}
  .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;height:68px}
  .logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
  .logo-mark{
    width:34px;height:34px;display:grid;place-items:center;flex-shrink:0;
    background:linear-gradient(135deg,var(--brand),var(--brand-deep));
    clip-path:polygon(22% 0,100% 0,100% 78%,78% 100%,0 100%,0 22%);
    color:#1A1005;font-weight:800;font-size:17px;
  }
  .logo-mark span{transform:translateY(-1px)}
  .logo-text{font-size:16px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
  .logo-text .hl{
    background:linear-gradient(120deg,var(--brand),var(--brand-2));
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .main-nav{display:flex;align-items:center;gap:6px}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;height:38px;padding:0 12px;
    font-size:15px;color:var(--tx-2);border-radius:10px;transition:color .2s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
    background:linear-gradient(90deg,var(--brand),var(--brand-2));
    box-shadow:0 0 10px rgba(255,138,43,.55);
    transform:scaleX(0);transform-origin:left;transition:transform .2s ease;
  }
  .nav-link:hover{color:var(--tx-1)}
  .nav-link:hover::after{transform:scaleX(1)}
  .nav-link.is-active{color:var(--tx-1)}
  .nav-link.is-active::after{transform:scaleX(1)}
  .nav-actions{display:flex;align-items:center;gap:10px}
  .nav-toggle{
    display:none;width:44px;height:44px;border-radius:12px;
    border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.04);
    align-items:center;justify-content:center;
  }
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--tx-1);border-radius:2px;position:relative}
  .nav-toggle span::before,.nav-toggle span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;background:var(--tx-1);border-radius:2px;
  }
  .nav-toggle span::before{top:-6px}
  .nav-toggle span::after{top:6px}
  .drawer{
    display:none;border-top:1px solid rgba(255,255,255,.08);
    background:rgba(8,13,26,.94);backdrop-filter:blur(14px);
  }
  .drawer.is-open{display:block}
  .drawer-inner{padding:10px 24px 20px}
  .drawer-link{
    display:flex;align-items:center;height:52px;padding:0 14px;font-size:15px;color:var(--tx-2);
    border-radius:12px;border:1px solid transparent;
  }
  .drawer-link.is-active{color:var(--tx-1);background:rgba(255,138,43,.1);border-color:rgba(255,138,43,.35)}
  .drawer-link:hover{background:rgba(255,255,255,.04)}

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 22px;border-radius:var(--r-md);
    font-size:15px;font-weight:600;letter-spacing:.02em;
    transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, filter .18s ease;
    white-space:nowrap;
  }
  .btn-primary{
    background:linear-gradient(135deg,var(--brand),var(--brand-2));
    color:#1A1005;box-shadow:var(--glow-brand);
  }
  .btn-primary:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 10px 32px -8px rgba(255,138,43,.72),0 0 0 1px rgba(255,138,43,.5)}
  .btn-primary:active{transform:translateY(0);box-shadow:0 4px 16px -8px rgba(255,138,43,.6)}
  .btn-ghost{
    background:transparent;border:1px solid rgba(255,255,255,.18);color:var(--tx-1);
  }
  .btn-ghost:hover{border-color:var(--brand);background:rgba(255,138,43,.08)}
  .btn-sm{height:40px;padding:0 16px;font-size:14px}
  .btn-full{width:100%}
  .btn-arrow{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--cyan);
    transition:color .2s ease;
  }
  .btn-arrow svg{transition:transform .2s ease}
  .btn-arrow:hover{color:var(--brand)}
  .btn-arrow:hover svg{transform:translateX(3px)}

  /* ---------- Badges / chips ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:var(--r-sm);
    font-size:12px;letter-spacing:.02em;font-weight:600;
  }
  .badge-cyan{background:rgba(56,225,255,.12);color:var(--cyan);border:1px solid rgba(56,225,255,.28);box-shadow:var(--glow-cyan)}
  .badge-brand{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#1A1005}
  .badge-ok{background:rgba(61,220,151,.1);color:var(--ok);border:1px solid rgba(61,220,151,.34)}
  .badge-line{background:rgba(255,255,255,.05);color:var(--tx-2);border:1px solid rgba(255,255,255,.12)}

  /* ---------- Page banner ---------- */
  .page-banner{position:relative;overflow:hidden;border-bottom:1px solid rgba(255,255,255,.06)}
  .page-banner::before{
    content:"";position:absolute;inset:0;
    background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    filter:saturate(115%);
  }
  .page-banner::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg, rgba(5,8,15,.72) 0%, rgba(5,8,15,.78) 55%, var(--bg-1) 100%);
  }
  .banner-inner{
    position:relative;z-index:2;
    display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center;
    padding-top:44px;padding-bottom:52px;
  }
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--tx-3);margin-bottom:16px;flex-wrap:wrap}
  .breadcrumb a{color:var(--tx-2)}
  .breadcrumb a:hover{color:var(--brand)}
  .breadcrumb .current{color:var(--tx-3)}
  .banner-title{
    font-size:38px;font-weight:700;line-height:1.22;letter-spacing:-.01em;max-width:640px;
  }
  .banner-sub{margin-top:14px;font-size:16px;color:var(--tx-2);max-width:560px}
  .banner-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:20px}
  .meta-text{font-size:13px;color:var(--tx-3)}
  .banner-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
  .banner-card{
    border-radius:var(--r-lg);border:1px solid var(--line);background:var(--glass);
    backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.14), var(--shadow);
    padding:24px;
  }
  .banner-card h2{font-size:16px;font-weight:700;display:flex;align-items:center;gap:8px}
  .banner-card h2::before{
    content:"";width:4px;height:16px;border-radius:2px;
    background:linear-gradient(180deg,var(--brand),var(--brand-2));
  }
  .banner-card ul{margin-top:14px;display:grid;gap:10px}
  .banner-card li{display:flex;gap:10px;font-size:14px;color:var(--tx-2);line-height:1.7}
  .banner-card li i{
    font-style:normal;font-size:12px;font-weight:700;color:var(--brand);
    font-variant-numeric:tabular-nums;flex-shrink:0;
  }
  .banner-card .banner-card-foot{
    margin-top:18px;padding-top:16px;border-top:1px solid rgba(255,255,255,.08);
    display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  }
  .banner-card .banner-card-foot span{font-size:13px;color:var(--tx-3)}

  /* ---------- Category chips ---------- */
  .cat-chips{
    display:flex;gap:10px;padding:18px 0 0;overflow-x:auto;scrollbar-width:none;
  }
  .cat-chips::-webkit-scrollbar{display:none}
  .cat-chip{
    display:inline-flex;align-items:center;height:40px;padding:0 18px;border-radius:999px;
    font-size:14px;font-weight:600;color:var(--tx-2);white-space:nowrap;
    background:var(--glass);border:1px solid var(--line);
    transition:color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease;
  }
  .cat-chip:hover{color:var(--tx-1);border-color:rgba(255,138,43,.5);transform:translateY(-1px)}
  .cat-chip.is-current{
    background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#1A1005;border-color:transparent;
    box-shadow:0 8px 22px -10px rgba(255,138,43,.75);
  }

  /* ---------- Sections ---------- */
  .section{padding:88px 0 0}
  .section:last-of-type{padding-bottom:88px}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:32px}
  .section-title{font-size:30px;font-weight:700;line-height:1.3;display:flex;align-items:center;gap:12px}
  .section-title::before{
    content:"";width:4px;height:22px;border-radius:2px;flex-shrink:0;
    background:linear-gradient(180deg,var(--brand),var(--brand-2));
    box-shadow:0 0 12px rgba(255,138,43,.5);
  }
  .section-desc{margin-top:10px;font-size:15px;color:var(--tx-2);max-width:680px}

  /* ---------- Topic grid (不规则) ---------- */
  .topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .topic-card{
    position:relative;overflow:hidden;display:flex;flex-direction:column;
    border-radius:var(--r-lg);border:1px solid var(--line);background:var(--glass);
    backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.14), var(--shadow);
    padding:26px;transition:transform .3s ease, border-color .3s ease, box-shadow .3s ease;
  }
  .topic-card:hover{transform:translateY(-4px);border-color:rgba(255,138,43,.42);box-shadow:inset 0 1px 0 rgba(255,255,255,.2), 0 18px 40px -20px rgba(255,138,43,.5)}
  .topic-card-feature{grid-column:span 2;grid-row:span 2;padding:0;display:grid;grid-template-rows:auto 1fr}
  .topic-thumb{position:relative;overflow:hidden;border-radius:var(--r-lg) var(--r-lg) 0 0;aspect-ratio:16/9}
  .topic-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
  .topic-card-feature:hover .topic-thumb img{transform:scale(1.04)}
  .topic-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 45%,rgba(5,8,15,.85) 100%)}
  .topic-thumb .badge{position:absolute;left:16px;top:16px;z-index:2}
  .topic-card-feature .topic-body{padding:24px 26px 28px}
  .topic-title{font-size:19px;font-weight:600;line-height:1.4;margin-top:14px}
  .topic-card-feature .topic-title{margin-top:0;font-size:24px}
  .topic-text{margin-top:10px;font-size:14.5px;line-height:1.75;color:var(--tx-2)}
  .topic-foot{margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px}

  /* ---------- Flow ---------- */
  .flow-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:start}
  .flow{display:grid;gap:14px}
  .flow-item{
    display:flex;gap:18px;padding:20px 22px;border-radius:var(--r-lg);
    background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.07);
    transition:background .2s ease, border-color .2s ease, transform .2s ease;
  }
  .flow-item:hover{background:rgba(255,255,255,.055);border-color:rgba(255,138,43,.35);transform:translateX(3px)}
  .flow-num{
    flex-shrink:0;width:40px;height:40px;border-radius:50%;display:grid;place-items:center;
    border:1px solid rgba(255,138,43,.55);color:var(--brand-2);
    font-weight:800;font-size:14px;font-variant-numeric:tabular-nums;
    background:rgba(255,138,43,.08);
  }
  .flow-body h3{font-size:17px;font-weight:600}
  .flow-body p{margin-top:6px;font-size:14px;color:var(--tx-2);line-height:1.7}
  .flow-media{
    position:sticky;top:96px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
    box-shadow:var(--shadow);
  }
  .flow-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
  .flow-media .flow-media-cap{
    padding:16px 20px;background:rgba(10,16,32,.9);font-size:13px;color:var(--tx-2);line-height:1.7;
    border-top:1px solid rgba(255,255,255,.07);
  }

  /* ---------- Prep (2+1) ---------- */
  .prep-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;align-items:stretch}
  .prep-side{display:grid;gap:20px}
  .glass-card{
    border-radius:var(--r-lg);border:1px solid var(--line);background:var(--glass);
    backdrop-filter:blur(14px) saturate(120%);-webkit-backdrop-filter:blur(14px) saturate(120%);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.14), var(--shadow);
    padding:26px;
  }
  .glass-card h3{font-size:18px;font-weight:600;display:flex;align-items:center;gap:10px}
  .glass-card h3 .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:var(--glow-cyan);flex-shrink:0}
  .check-list{margin-top:16px;display:grid;gap:14px}
  .check-list li{display:flex;gap:12px;font-size:14.5px;color:var(--tx-2);line-height:1.75}
  .check-list li i{
    font-style:normal;flex-shrink:0;width:20px;height:20px;margin-top:3px;border-radius:6px;
    display:grid;place-items:center;background:rgba(255,138,43,.14);color:var(--brand-2);
    font-size:12px;font-weight:800;
  }

  /* ---------- FAQ ---------- */
  .faq-groups{display:grid;gap:32px}
  .faq-group h3{font-size:20px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:10px}
  .faq-group h3 span{
    font-size:12px;color:var(--cyan);border:1px solid rgba(56,225,255,.3);background:rgba(56,225,255,.1);
    padding:2px 8px;border-radius:6px;font-weight:600;letter-spacing:.02em;
  }
  .faq-list{display:grid;gap:10px}
  .faq-item{
    border-radius:var(--r-md);border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.03);
    overflow:hidden;transition:border-color .2s ease, background .2s ease;
  }
  .faq-item:hover{border-color:rgba(255,138,43,.35);background:rgba(255,255,255,.05)}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    min-height:56px;padding:14px 20px;font-size:16px;font-weight:600;color:var(--tx-1);
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-icon{position:relative;width:18px;height:18px;flex-shrink:0}
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .2s ease, opacity .2s ease;
  }
  .faq-icon::before{left:0;top:8px;width:18px;height:2px}
  .faq-icon::after{top:0;left:8px;width:2px;height:18px}
  .faq-item[open] .faq-icon::after{transform:rotate(90deg);opacity:0}
  .faq-body{
    padding:0 20px 18px;font-size:15px;line-height:1.8;color:var(--tx-2);
    background:rgba(255,255,255,.03);border-top:1px solid rgba(255,255,255,.06);padding-top:16px;
  }

  /* ---------- Related ---------- */
  .rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .rel-card{
    position:relative;overflow:hidden;border-radius:var(--r-lg);border:1px solid var(--line);
    background:rgba(255,255,255,.03);transition:transform .3s ease, border-color .3s ease;
  }
  .rel-card:hover{transform:translateY(-4px);border-color:rgba(255,138,43,.42)}
  .rel-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
  .rel-card:hover img{transform:scale(1.04)}
  .rel-card-body{padding:20px 22px 24px}
  .rel-card-body h3{font-size:18px;font-weight:600}
  .rel-card-body p{margin-top:8px;font-size:14px;color:var(--tx-2);line-height:1.7}

  /* ---------- CTA band ---------- */
  .cta-band{
    position:relative;overflow:hidden;border-radius:22px;padding:44px 40px;
    border:1px solid rgba(255,138,43,.35);
    background:
      radial-gradient(600px 260px at 12% 0%, rgba(255,138,43,.18), transparent 62%),
      linear-gradient(150deg, rgba(20,30,54,.9), rgba(10,16,32,.92));
    box-shadow:inset 0 1px 0 rgba(255,255,255,.16), 0 24px 60px -30px rgba(255,138,43,.6);
    display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
  }
  .cta-band h2{font-size:28px;font-weight:700;line-height:1.32;max-width:520px}
  .cta-band p{margin-top:10px;font-size:14.5px;color:var(--tx-2);max-width:540px}

  /* ---------- Footer ---------- */
  .site-footer{
    position:relative;margin-top:88px;background:#04070F;
    border-top:1px solid rgba(255,255,255,.06);
  }
  .site-footer::before{
    content:"";position:absolute;top:0;left:0;right:0;height:1px;
    background:linear-gradient(90deg, transparent, rgba(255,138,43,.7), transparent);
  }
  .footer-grid{
    display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;
    padding-top:56px;padding-bottom:36px;
  }
  .footer-brand p{margin-top:14px;font-size:13.5px;color:var(--tx-3);line-height:1.8;max-width:360px}
  .footer-col h4{font-size:14px;font-weight:600;color:var(--tx-1);margin-bottom:14px}
  .footer-col ul{display:grid;gap:10px}
  .footer-col a{font-size:13px;color:var(--tx-3);transition:color .2s ease}
  .footer-col a:hover{color:var(--brand)}
  .footer-bottom{
    display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
    padding-top:18px;padding-bottom:22px;border-top:1px solid rgba(255,255,255,.06);
  }
  .footer-bottom p{font-size:12px;color:var(--tx-3);line-height:1.7}
  .site-footer .logo{padding-bottom:2px}

  /* ---------- Mobile tabbar ---------- */
  .tabbar{
    display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:rgba(8,13,26,.86);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-top:1px solid rgba(255,255,255,.08);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .tabbar-inner{display:grid;grid-template-columns:repeat(5,1fr)}
  .tab-item{
    position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    min-height:60px;padding:8px 2px;color:var(--tx-3);font-size:11px;
    transition:color .2s ease, transform .2s ease;
  }
  .tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
  .tab-item.is-active{color:var(--brand);transform:translateY(-2px)}
  .tab-item.is-active::before{
    content:"";position:absolute;top:4px;left:50%;transform:translateX(-50%);
    width:24px;height:2px;border-radius:2px;background:var(--brand);
    box-shadow:0 0 10px rgba(255,138,43,.8);
  }

  /* ---------- anchor offset ---------- */
  #topics,#flow,#prep,#faq,#related,#signup{scroll-margin-top:84px}

  /* ---------- Responsive ---------- */
  @media (max-width:1023px){
    .main-nav{display:none}
    .nav-toggle{display:inline-flex}
    .banner-inner{grid-template-columns:1fr;gap:28px;padding-top:36px;padding-bottom:42px}
    .banner-title{font-size:32px}
    .topic-grid{grid-template-columns:repeat(2,1fr)}
    .topic-card-feature{grid-column:span 2;grid-row:auto}
    .flow-wrap{grid-template-columns:1fr}
    .flow-media{position:static}
    .prep-grid{grid-template-columns:1fr}
    .rel-grid{grid-template-columns:1fr 1fr}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
    .section{padding-top:64px}
  }
  @media (max-width:767px){
    .container{padding:0 16px}
    .banner-title{font-size:27px}
    .section-title{font-size:23px}
    .cta-band{padding:30px 22px}
    .cta-band h2{font-size:22px}
    .rel-grid{grid-template-columns:1fr}
    .topic-grid{grid-template-columns:1fr}
    .topic-card-feature{grid-column:span 1}
    .topic-card-feature .topic-title{font-size:20px}
    .glass-card,.topic-card{padding:22px}
    .topic-card-feature{padding:0}
    .btn{height:48px}
  }
  @media (max-width:639px){
    body{padding-bottom:84px}
    .tabbar{display:block}
    .nav-actions .btn{display:none}
    .logo-text{font-size:15px}
    .footer-grid{grid-template-columns:1fr;gap:24px;padding-top:40px}
    .footer-bottom{padding-bottom:26px}
    .banner-actions .btn{flex:1 1 auto}
    .section{padding-top:52px}
    .site-footer{margin-top:56px}
  }