/* roulang page: index */
:root{
  --bg-0:#050A14;
  --bg-1:#081120;
  --bg-2:#0C1A2C;
  --bg-3:#04080F;
  --line:rgba(122,190,255,0.14);
  --line-strong:rgba(122,190,255,0.28);
  --text-1:#EAF2FF;
  --text-2:#A8BAD2;
  --text-3:#6C82A0;
  --primary:#2FE0D0;
  --primary-deep:#0E8F8B;
  --accent:#4C6FFF;
  --warm:#FFB03A;
  --danger:#FF5D6C;
  --grad-primary:linear-gradient(135deg,#2FE0D0,#4C6FFF);
  --glass:rgba(140,200,255,0.055);
  --r-card:18px;
  --r-btn:12px;
  --r-input:12px;
  --r-img:16px;
  --r-pill:999px;
  --r-faq:14px;
  --shadow-card:0 16px 40px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(47,224,208,.35),0 8px 30px rgba(47,224,208,.22);
  --inner-hl:inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar-w:248px;
  --container:1280px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(760px 760px at 18% 8%,rgba(47,224,208,.13),transparent 62%),
    radial-gradient(880px 880px at 88% 32%,rgba(76,111,255,.12),transparent 64%),
    radial-gradient(620px 620px at 62% 96%,rgba(255,176,58,.06),transparent 66%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:.5;
  background-image:
    linear-gradient(rgba(122,190,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,190,255,.05) 1px,transparent 1px),
    radial-gradient(1.5px 1.5px at 12% 22%,rgba(234,242,255,.22),transparent 100%),
    radial-gradient(1.5px 1.5px at 74% 14%,rgba(234,242,255,.18),transparent 100%),
    radial-gradient(1px 1px at 42% 68%,rgba(234,242,255,.2),transparent 100%),
    radial-gradient(1.5px 1.5px at 88% 78%,rgba(234,242,255,.16),transparent 100%),
    radial-gradient(1px 1px at 28% 88%,rgba(234,242,255,.14),transparent 100%);
  background-size:72px 72px,72px 72px,100% 100%,100% 100%,100% 100%,100% 100%,100% 100%;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--primary);}
img{display:block;max-width:100%;height:auto;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,select,textarea{font:inherit;color:inherit;}
svg{display:block;}
::selection{background:rgba(47,224,208,.28);color:#fff;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px;}

/* ============ 侧边导航 ============ */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  z-index:60;
  display:flex;
  flex-direction:column;
  padding:0 0 20px;
  background:linear-gradient(180deg,rgba(8,17,32,.92),rgba(5,10,20,.94));
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
}
.sidebar::after{
  content:"";
  position:absolute;
  top:0;right:0;bottom:0;
  width:1px;
  background:linear-gradient(180deg,transparent,rgba(122,190,255,.24) 22%,rgba(122,190,255,.24) 78%,transparent);
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  height:88px;
  padding:0 22px;
  border-bottom:1px solid var(--line);
}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;
  border-radius:12px;
  background:var(--grad-primary);
  display:grid;place-items:center;
  box-shadow:0 6px 18px rgba(47,224,208,.24);
  color:#04121A;
}
.brand-mark svg{width:21px;height:21px;}
.brand-text{min-width:0;}
.brand-name{
  font-size:18px;font-weight:800;letter-spacing:-.2px;line-height:1.2;
  white-space:nowrap;
}
.brand-sub{
  font-size:11px;color:var(--text-3);line-height:1.5;letter-spacing:.5px;
  white-space:nowrap;
}
.nav-list{
  padding:22px 14px 0;
  display:flex;flex-direction:column;gap:4px;
  flex:1;overflow-y:auto;
}
.nav-item{
  display:flex;align-items:center;gap:12px;
  height:44px;
  padding:0 12px 0 14px;
  border-radius:12px;
  font-size:15px;
  color:var(--text-2);
  position:relative;
  transition:background .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.nav-item svg{width:17px;height:17px;flex:0 0 17px;opacity:.85;}
.nav-item:hover{background:var(--glass);color:var(--primary);}
.nav-item.active{
  background:var(--glass);
  color:var(--text-1);
  box-shadow:var(--inner-hl);
}
.nav-item.active svg{color:var(--primary);opacity:1;}
.nav-item.active::before{
  content:"";
  position:absolute;left:0;top:10px;bottom:10px;width:3px;
  border-radius:3px;
  background:var(--primary);
  box-shadow:0 0 12px rgba(47,224,208,.85);
}
.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sidebar-foot{padding:16px 18px 0;border-top:1px solid var(--line);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  letter-spacing:.3px;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--grad-primary);
  color:#04121A;
  box-shadow:0 8px 24px rgba(47,224,208,.22);
}
.btn-primary:hover{
  color:#04121A;
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(47,224,208,.4),0 14px 34px rgba(47,224,208,.34);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px rgba(47,224,208,.3);}
.btn-ghost{
  background:var(--glass);
  color:var(--text-1);
  border:1px solid var(--line-strong);
  box-shadow:var(--inner-hl);
}
.btn-ghost:hover{
  color:var(--primary);
  border-color:rgba(47,224,208,.5);
  transform:translateY(-2px);
  box-shadow:0 10px 26px rgba(0,0,0,.35),var(--inner-hl);
}
.btn-ghost:active{transform:translateY(0);}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-block{width:100%;}
.sidebar-contact-line{
  margin-top:12px;
  font-size:11px;
  color:var(--text-3);
  text-align:center;
  letter-spacing:.4px;
  white-space:nowrap;
}

/* ============ 移动顶栏与抽屉 ============ */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
  align-items:center;justify-content:space-between;
  padding:0 18px;
  background:rgba(6,12,22,.9);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.topbar .brand{padding:0;height:auto;border:0;gap:10px;}
.topbar .brand-mark{width:32px;height:32px;flex:0 0 32px;border-radius:10px;}
.topbar .brand-mark svg{width:17px;height:17px;}
.topbar .brand-name{font-size:16px;}
.burger{
  width:44px;height:44px;display:grid;place-items:center;
  border-radius:12px;border:1px solid var(--line-strong);
  background:var(--glass);
}
.burger span{display:block;width:18px;height:2px;background:var(--text-1);border-radius:2px;position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-1);border-radius:2px;
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
.drawer{
  position:fixed;inset:0;z-index:80;
  background:rgba(5,10,20,.94);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  padding:24px 22px 110px;
  display:flex;flex-direction:column;
  opacity:0;visibility:hidden;transform:translateY(-12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  overflow-y:auto;
}
.drawer.open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line-strong);
  display:grid;place-items:center;font-size:22px;color:var(--text-2);
}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  font-size:20px;font-weight:600;line-height:3.2;
  border-bottom:1px solid var(--line);
  color:var(--text-2);
}
.drawer-nav a:hover{color:var(--primary);}
.drawer-nav a.active{color:var(--primary);}
.drawer-cta{
  position:fixed;left:0;right:0;bottom:0;
  padding:16px 22px 22px;
  background:linear-gradient(180deg,rgba(5,10,20,0),rgba(5,10,20,.96) 42%);
}

/* ============ 主内容 ============ */
.main{
  position:relative;z-index:1;
  margin-left:var(--sidebar-w);
  min-height:100vh;
}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 56px;
}
section{position:relative;}
.section{padding:96px 0;}
.section-alt{
  background:linear-gradient(180deg,rgba(8,17,32,0),rgba(8,17,32,.72) 18%,rgba(8,17,32,.72) 82%,rgba(8,17,32,0));
}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  margin-bottom:44px;
}
.section-head h2{
  font-size:clamp(24px,2.4vw,36px);
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.4px;
}
.section-sub{
  margin-top:10px;
  font-size:14px;
  color:var(--text-3);
  line-height:1.7;
  max-width:560px;
}
.text-link{
  font-size:14px;font-weight:600;color:var(--primary);
  display:inline-flex;align-items:center;gap:6px;
  white-space:nowrap;
}
.text-link span{transition:transform .2s var(--ease);}
.text-link:hover{color:var(--primary);}
.text-link:hover span{transform:translateX(4px);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:2px;color:var(--primary);
  text-transform:uppercase;
  margin-bottom:18px;
}
.eyebrow::before{
  content:"";width:22px;height:1px;background:var(--primary);opacity:.7;
}

/* ============ Hero ============ */
.hero{padding:110px 0 96px;overflow:hidden;}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:56px;
  align-items:center;
}
.hero-copy{max-width:640px;}
.hero h1{
  font-size:clamp(30px,4vw,54px);
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.5px;
  margin-bottom:22px;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,#2FE0D0,#7FA6FF);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{
  font-size:16px;
  color:var(--text-2);
  line-height:1.8;
  max-width:560px;
  margin-bottom:32px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:34px;}
.trust-row{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:0;
  font-size:14px;color:var(--text-3);
}
.trust-row li{padding:0 18px;position:relative;line-height:1.6;}
.trust-row li:first-child{padding-left:0;}
.trust-row li + li::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:13px;background:var(--line-strong);
}
.hero-visual{position:relative;}
.hero-frame{
  position:relative;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card),var(--inner-hl);
  background:var(--bg-2);
  aspect-ratio:4/5;
}
.hero-frame::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;z-index:3;
  background:linear-gradient(90deg,transparent,rgba(47,224,208,.9),rgba(76,111,255,.6),transparent);
}
.hero-frame img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.hero-frame::after{
  content:"";position:absolute;inset:0;z-index:2;
  background:linear-gradient(180deg,rgba(5,10,20,.05) 0%,rgba(5,10,20,.15) 46%,rgba(5,10,20,.92) 100%);
}
.hero-frame:hover img{transform:scale(1.03);}
.hero-frame-cap{
  position:absolute;left:20px;right:20px;bottom:18px;z-index:4;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:12px;color:var(--text-2);
  letter-spacing:.5px;
}
.hero-frame-cap strong{color:var(--text-1);font-size:13px;font-weight:700;}
.hero-badge{
  position:absolute;top:18px;left:18px;z-index:4;
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:var(--r-pill);
  font-size:12px;
  color:var(--primary);
  background:rgba(47,224,208,.12);
  border:1px solid rgba(47,224,208,.32);
  backdrop-filter:blur(8px);
}
.hero-badge i{
  width:6px;height:6px;border-radius:50%;background:var(--primary);
  box-shadow:0 0 8px var(--primary);display:inline-block;
}

/* ============ 服务编号卡 ============ */
.svc-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:22px;
}
.svc-card{
  display:flex;align-items:flex-start;gap:22px;
  padding:30px 28px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card),var(--inner-hl);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.svc-card:nth-child(even){transform:translateY(32px);}
.svc-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 20px 46px rgba(0,0,0,.5),0 0 30px rgba(47,224,208,.12),var(--inner-hl);
}
.svc-card:nth-child(even):hover{transform:translateY(28px);}
.svc-num{
  font-size:44px;font-weight:700;line-height:1;
  letter-spacing:-2px;
  color:var(--warm);
  font-variant-numeric:tabular-nums;
  opacity:.92;
  flex:0 0 auto;
  text-shadow:0 0 26px rgba(255,176,58,.34);
}
.svc-card:nth-child(2) .svc-num,
.svc-card:nth-child(3) .svc-num{color:var(--primary);text-shadow:0 0 26px rgba(47,224,208,.34);}
.svc-body{flex:1;min-width:0;}
.svc-body h3{
  font-size:20px;font-weight:600;line-height:1.4;margin-bottom:8px;
}
.svc-body p{font-size:14.5px;color:var(--text-2);line-height:1.8;}
.svc-arrow{
  flex:0 0 auto;align-self:center;
  color:var(--text-3);font-size:20px;line-height:1;
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.svc-card:hover .svc-arrow{color:var(--primary);transform:translateX(4px);}

/* ============ 数据条 ============ */
.stats-band{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  border-radius:var(--r-card);
  border:1px solid var(--line-strong);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card),var(--inner-hl);
  overflow:hidden;
  position:relative;
}
.stats-band::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:var(--grad-primary);opacity:.8;
}
.stat{
  padding:38px 26px;
  text-align:center;
  position:relative;
}
.stat + .stat::before{
  content:"";position:absolute;left:0;top:22%;bottom:22%;width:1px;background:var(--line);
}
.stat-num{
  font-size:clamp(40px,4.4vw,60px);
  font-weight:700;
  line-height:1;
  letter-spacing:-2px;
  font-variant-numeric:tabular-nums;
  color:var(--primary);
  text-shadow:0 0 30px rgba(47,224,208,.32);
}
.stat:nth-child(3) .stat-num{color:var(--warm);text-shadow:0 0 30px rgba(255,176,58,.3);}
.stat-label{
  margin-top:12px;
  font-size:13px;
  color:var(--text-3);
  letter-spacing:.6px;
}

/* ============ 案例 ============ */
.case-grid{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:22px;
  align-items:start;
}
.case-main{
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--bg-2);
  box-shadow:var(--shadow-card),var(--inner-hl);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.case-main:hover{transform:translateY(-4px);border-color:var(--line-strong);}
.case-main figure{margin:0;aspect-ratio:16/9;overflow:hidden;position:relative;}
.case-main img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.case-main:hover img{transform:scale(1.03);}
.case-main-body{padding:26px 26px 28px;}
.case-tag{
  display:inline-block;font-size:12px;padding:4px 12px;border-radius:var(--r-pill);
  color:var(--primary);background:rgba(47,224,208,.12);
  border:1px solid rgba(47,224,208,.3);
  margin-bottom:14px;
}
.case-main-body h3{font-size:22px;font-weight:600;line-height:1.4;margin-bottom:10px;}
.case-main-body p{font-size:14.5px;color:var(--text-2);line-height:1.8;}
.case-side{display:grid;gap:22px;}
.case-side-card{
  padding:24px 24px 26px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card),var(--inner-hl);
  transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.case-side-card:hover{transform:translateY(-4px);border-color:var(--line-strong);}
.case-side-card small{
  font-size:12px;letter-spacing:1px;color:var(--text-3);
  display:block;margin-bottom:10px;
}
.case-side-card h3{font-size:18px;font-weight:600;line-height:1.45;margin-bottom:10px;}
.case-side-card p{font-size:14px;color:var(--text-2);line-height:1.75;}
.case-kpi{
  margin-top:14px;font-size:13px;color:var(--primary);
  font-variant-numeric:tabular-nums;letter-spacing:.4px;
}

/* ============ 方案分栏列表 ============ */
.plan-list{border-top:1px solid var(--line);}
.plan-row{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,7fr) auto;
  gap:24px;
  align-items:center;
  padding:26px 22px 26px 20px;
  border-bottom:1px solid var(--line);
  position:relative;
  transition:background .22s var(--ease),transform .22s var(--ease);
}
.plan-row::before{
  content:"";position:absolute;left:0;top:22%;bottom:22%;width:3px;border-radius:3px;
  background:var(--primary);opacity:0;
  box-shadow:0 0 12px rgba(47,224,208,.8);
  transition:opacity .22s var(--ease);
}
.plan-row:hover{background:rgba(140,200,255,.04);transform:translateX(4px);}
.plan-row:hover::before{opacity:1;}
.plan-name{display:flex;align-items:baseline;gap:14px;min-width:0;}
.plan-idx{
  font-size:13px;color:var(--warm);font-variant-numeric:tabular-nums;letter-spacing:1px;
  flex:0 0 auto;
}
.plan-name h3{font-size:19px;font-weight:600;line-height:1.45;}
.plan-desc{font-size:14px;color:var(--text-2);line-height:1.75;}
.plan-link{font-size:14px;color:var(--text-3);white-space:nowrap;transition:color .2s var(--ease);}
.plan-row:hover .plan-link{color:var(--primary);}

/* ============ 资讯卡片 ============ */
.news-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.news-card{
  display:flex;flex-direction:column;
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card),var(--inner-hl);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.news-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 20px 46px rgba(0,0,0,.5),0 0 26px rgba(47,224,208,.1),var(--inner-hl);
}
.news-thumb{
  aspect-ratio:16/9;
  overflow:hidden;
  position:relative;
  background:linear-gradient(135deg,#0C1A2C,#081120);
}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.news-card:hover .news-thumb img{transform:scale(1.03);}
.news-body{padding:20px 22px 0;flex:1;display:flex;flex-direction:column;}
.news-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-bottom:12px;
}
.badge{
  display:inline-block;
  font-size:12px;
  padding:4px 12px;
  border-radius:var(--r-pill);
  color:var(--primary);
  background:rgba(47,224,208,.12);
  border:1px solid rgba(47,224,208,.3);
  white-space:nowrap;
}
.news-date{font-size:13px;color:var(--text-3);font-variant-numeric:tabular-nums;white-space:nowrap;}
.news-card h3{
  font-size:17px;font-weight:600;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  margin-bottom:10px;
}
.news-card h3 a:hover{color:var(--primary);}
.news-summary{
  font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:18px;
  padding:14px 22px;
  border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
  display:flex;align-items:center;justify-content:space-between;
}
.news-card:hover .news-foot{color:var(--primary);}
.empty-state{
  grid-column:1/-1;
  padding:56px 24px;
  text-align:center;
  border-radius:var(--r-card);
  border:1px dashed var(--line-strong);
  background:rgba(140,200,255,.03);
}
.empty-icon{
  width:52px;height:52px;margin:0 auto 16px;
  border-radius:50%;
  display:grid;place-items:center;
  border:1px solid var(--line-strong);
  color:var(--text-3);
}
.empty-state strong{display:block;font-size:16px;color:var(--text-1);margin-bottom:6px;font-weight:600;}
.empty-state span{font-size:13px;color:var(--text-3);}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{
  border-radius:var(--r-faq);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--inner-hl);
  margin-bottom:14px;
  overflow:hidden;
  position:relative;
  transition:border-color .2s var(--ease);
}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;
  background:var(--primary);opacity:0;border-radius:2px;
  box-shadow:0 0 12px rgba(47,224,208,.8);
  transition:opacity .2s var(--ease);
}
.faq-item.open{border-color:rgba(47,224,208,.4);}
.faq-item.open::before{opacity:1;}
.faq-q{
  width:100%;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px;
  font-size:17px;font-weight:600;line-height:1.55;
  text-align:left;
  color:var(--text-1);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--primary);}
.faq-icon{
  flex:0 0 24px;
  width:24px;height:24px;
  display:grid;place-items:center;
  font-size:18px;line-height:1;
  color:var(--primary);
  transition:transform .2s var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s var(--ease);
}
.faq-a-inner{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}

/* ============ CTA ============ */
.cta-panel{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;
  padding:48px;
  border-radius:var(--r-card);
  border:1px solid var(--line-strong);
  background:linear-gradient(140deg,rgba(12,26,44,.92),rgba(8,17,32,.86));
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card);
  position:relative;
  overflow:hidden;
}
.cta-panel::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:var(--grad-primary);
}
.cta-panel::after{
  content:"";position:absolute;width:520px;height:520px;right:-160px;bottom:-220px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,224,208,.16),transparent 68%);
  pointer-events:none;
}
.cta-copy{position:relative;z-index:1;}
.cta-copy h2{font-size:clamp(24px,2.4vw,34px);font-weight:700;line-height:1.3;letter-spacing:-.4px;margin-bottom:16px;}
.cta-copy p{font-size:15px;color:var(--text-2);line-height:1.85;margin-bottom:26px;max-width:440px;}
.cta-points{display:grid;gap:12px;}
.cta-points li{
  display:flex;align-items:flex-start;gap:10px;
  font-size:14px;color:var(--text-2);line-height:1.7;
}
.cta-points li::before{
  content:"";flex:0 0 6px;width:6px;height:6px;margin-top:9px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 10px rgba(47,224,208,.9);
}
.form{position:relative;z-index:1;display:grid;gap:16px;}
.field{display:grid;gap:8px;}
.field label{font-size:13px;color:var(--text-2);letter-spacing:.3px;}
.req{color:var(--warm);margin-left:3px;}
.field input,.field select,.field textarea{
  width:100%;
  padding:14px 16px;
  border-radius:var(--r-input);
  border:1px solid var(--line);
  background:var(--bg-2);
  color:var(--text-1);
  font-size:15px;
  line-height:1.6;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease);
}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:hover,.field select:hover,.field textarea:hover{border-color:var(--line-strong);}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(47,224,208,.15);
  background:#0D1E31;
}
.field textarea{resize:vertical;min-height:104px;}
.field select{appearance:none;-webkit-appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--text-3) 50%),linear-gradient(135deg,var(--text-3) 50%,transparent 50%);
  background-position:calc(100% - 20px) 22px,calc(100% - 14px) 22px;
  background-size:6px 6px,6px 6px;
  background-repeat:no-repeat;
}
.form-note{font-size:12px;color:var(--text-3);line-height:1.7;}
.form-tip{font-size:13px;color:var(--primary);min-height:20px;}

/* ============ 页脚 ============ */
.footer{
  margin-top:0;
  background:var(--bg-3);
  border-top:1px solid transparent;
  padding:64px 0 26px;
  position:relative;
}
.footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,208,.5),rgba(76,111,255,.4),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr) minmax(0,1.3fr);
  gap:40px;
  padding-bottom:44px;
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;}
.footer-brand .brand-mark svg{width:18px;height:18px;}
.footer-brand span{font-size:18px;font-weight:800;letter-spacing:-.2px;}
.footer-desc{font-size:14px;color:var(--text-2);line-height:1.85;max-width:320px;}
.footer h4{
  font-size:14px;font-weight:600;color:var(--text-1);
  margin-bottom:16px;letter-spacing:.5px;
}
.footer-links{display:grid;gap:11px;}
.footer-links a{
  font-size:14px;color:var(--text-2);display:inline-block;
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-links a:hover{color:var(--primary);transform:translateX(2px);}
.footer-contact{display:grid;gap:12px;font-size:14px;color:var(--text-2);line-height:1.7;}
.footer-contact strong{color:var(--text-1);font-weight:600;display:block;font-size:13px;margin-bottom:2px;letter-spacing:.4px;}
.footer-bottom{
  border-top:1px solid rgba(122,190,255,.1);
  padding-top:22px;
  text-align:center;
  font-size:12px;
  color:var(--text-3);
  line-height:1.9;
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:28px;bottom:28px;z-index:65;
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;
  background:rgba(12,26,44,.86);
  border:1px solid var(--line-strong);
  color:var(--text-2);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  box-shadow:0 10px 26px rgba(0,0,0,.45);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),color .2s var(--ease),border-color .2s var(--ease),visibility .24s;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--primary);border-color:rgba(47,224,208,.5);}
.to-top svg{width:17px;height:17px;}

/* ============ 响应式 ============ */
@media (max-width:1399px){
  .container{padding:0 40px;}
  .hero-grid{gap:44px;}
}
@media (max-width:1199px){
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-panel{padding:38px;gap:34px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:1023px){
  :root{--sidebar-w:88px;}
  .container{padding:0 32px;}
  .brand{padding:0;justify-content:center;height:88px;}
  .brand-text{display:none;}
  .nav-list{padding:20px 10px 0;align-items:center;}
  .nav-item{
    width:56px;height:52px;padding:0;justify-content:center;
    gap:0;
  }
  .nav-item .nav-label{display:none;}
  .nav-item svg{width:20px;height:20px;flex:0 0 20px;}
  .nav-item.active::before{top:12px;bottom:12px;}
  .sidebar-foot{padding:14px 10px 0;}
  .sidebar-foot .btn{
    width:56px;height:52px;padding:0;font-size:0;gap:0;
  }
  .sidebar-foot .btn svg{width:20px;height:20px;}
  .sidebar-contact-line{display:none;}
  .hero{padding:80px 0 72px;}
  .hero-grid{grid-template-columns:minmax(0,1fr) minmax(0,40%);gap:32px;}
  .hero-frame{aspect-ratio:3/4;}
  .section{padding:76px 0;}
  .section-head{margin-bottom:34px;}
  .svc-grid{gap:18px;}
  .svc-card{padding:24px 22px;gap:16px;}
  .svc-num{font-size:38px;}
  .stats-band{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat:nth-child(3)::before{display:none;}
  .stat:nth-child(3),.stat:nth-child(4){border-top:1px solid var(--line);}
  .case-grid{grid-template-columns:1fr;}
  .plan-row{grid-template-columns:minmax(0,1fr) auto;gap:16px;}
  .plan-desc{grid-column:1/-1;grid-row:2;}
  .cta-panel{grid-template-columns:1fr;padding:34px;}
}
@media (max-width:767px){
  :root{--sidebar-w:0px;}
  body{font-size:15.5px;}
  .sidebar{display:none;}
  .topbar{display:flex;}
  .main{margin-left:0;padding-top:64px;}
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px;}
  .hero{padding:44px 0 56px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero h1{font-size:clamp(30px,8vw,40px);}
  .hero-sub{font-size:15px;margin-bottom:26px;}
  .hero-actions{flex-direction:column;align-items:stretch;gap:12px;margin-bottom:26px;}
  .hero-actions .btn{width:100%;}
  .trust-row{gap:8px 0;font-size:13px;}
  .trust-row li{padding:0 12px;}
  .hero-frame{aspect-ratio:4/3;}
  .svc-grid{grid-template-columns:1fr;gap:16px;}
  .svc-card:nth-child(even){transform:none;}
  .svc-card:nth-child(even):hover{transform:translateY(-4px);}
  .svc-num{font-size:34px;}
  .stats-band{grid-template-columns:1fr 1fr;}
  .stat{padding:26px 14px;}
  .stat-num{font-size:38px;}
  .stat-label{font-size:12px;margin-top:8px;}
  .news-grid{grid-template-columns:1fr;}
  .faq-q{font-size:15.5px;padding:16px;gap:12px;}
  .faq-a-inner{padding:0 16px 16px;font-size:14.5px;}
  .cta-panel{padding:24px 20px;gap:26px;}
  .footer{padding:46px 0 20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:30px;}
  .footer-desc{max-width:none;}
  .to-top{right:16px;bottom:16px;width:42px;height:42px;}
  .plan-row{padding:20px 14px 20px 16px;}
  .plan-name h3{font-size:17px;}
  .news-foot{padding:12px 18px;}
  .news-body{padding:18px 18px 0;}
}
@media (max-width:520px){
  .stats-band{grid-template-columns:1fr;}
  .stat + .stat::before{display:none;}
  .stat{border-top:1px solid var(--line);}
  .stat:first-child{border-top:0;}
  .hero-frame-cap{flex-direction:column;align-items:flex-start;gap:4px;}
}

/* roulang page: article */
:root{
  --bg-0:#050A14;
  --bg-1:#081120;
  --bg-2:#0C1A2C;
  --line:rgba(122,190,255,.14);
  --line-strong:rgba(122,190,255,.28);
  --text-1:#EAF2FF;
  --text-2:#A8BAD2;
  --text-3:#6C82A0;
  --primary:#2FE0D0;
  --primary-deep:#0E8F8B;
  --accent:#4C6FFF;
  --warm:#FFB03A;
  --grad-primary:linear-gradient(135deg,#2FE0D0,#4C6FFF);
  --glass:rgba(140,200,255,.055);
  --glass-2:rgba(140,200,255,.085);
  --radius-card:18px;
  --radius-btn:12px;
  --radius-img:16px;
  --radius-badge:999px;
  --radius-faq:14px;
  --shadow-card:0 16px 40px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(47,224,208,.35),0 8px 30px rgba(47,224,208,.22);
  --shadow-inner:inset 0 1px 0 rgba(255,255,255,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar-w:248px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(760px 760px at 82% -6%,rgba(47,224,208,.16),transparent 62%),
    radial-gradient(820px 820px at 4% 22%,rgba(76,111,255,.15),transparent 66%),
    radial-gradient(560px 560px at 60% 96%,rgba(255,176,58,.07),transparent 70%);
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(122,190,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,190,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 50% 20%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 20%,#000 0%,transparent 78%);
  opacity:.9;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease),opacity .18s var(--ease)}
a:hover{color:var(--primary)}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}

/* ---------- 侧栏导航 ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  display:flex;
  flex-direction:column;
  background:rgba(6,12,22,.88);
  backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  z-index:60;
}
.sidebar::after{
  content:"";
  position:absolute;top:0;right:0;width:1px;height:100%;
  background:linear-gradient(180deg,transparent,rgba(122,190,255,.28) 16%,rgba(122,190,255,.28) 84%,transparent);
}
.sidebar-brand{
  height:88px;
  display:flex;align-items:center;gap:12px;
  padding:0 20px;
  border-bottom:1px solid var(--line);
  flex:none;
}
.brand-mark{
  width:38px;height:38px;flex:none;
  display:grid;place-items:center;
  border-radius:12px;
  color:var(--primary);
  background:linear-gradient(135deg,rgba(47,224,208,.18),rgba(76,111,255,.18));
  border:1px solid rgba(47,224,208,.35);
  box-shadow:0 0 18px rgba(47,224,208,.18);
}
.brand-mark svg{width:20px;height:20px}
.brand-text{min-width:0}
.brand-text strong{
  display:block;
  font-size:18px;font-weight:800;line-height:1.2;letter-spacing:-.3px;
  white-space:nowrap;
}
.brand-text em{
  display:block;font-style:normal;
  font-size:11px;color:var(--text-3);letter-spacing:.08em;
  margin-top:2px;white-space:nowrap;
}
.nav-list{
  flex:1;
  overflow-y:auto;
  padding:14px 12px;
  display:flex;flex-direction:column;gap:4px;
}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  height:44px;
  padding:0 12px 0 20px;
  border-radius:var(--radius-btn);
  color:var(--text-2);
  font-size:15px;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item svg{width:18px;height:18px;flex:none;opacity:.78;transition:opacity .18s var(--ease)}
.nav-item::before{
  content:"";
  position:absolute;left:0;top:50%;
  width:3px;height:0;
  border-radius:var(--radius-badge);
  background:var(--primary);
  box-shadow:0 0 12px rgba(47,224,208,.8);
  transform:translateY(-50%);
  transition:height .2s var(--ease);
}
.nav-item:hover{background:var(--glass);color:var(--primary)}
.nav-item:hover svg{opacity:1}
.nav-item.active{
  background:var(--glass);
  color:var(--text-1);
  box-shadow:inset 0 0 0 1px var(--line);
}
.nav-item.active::before{height:20px}
.nav-item.active svg{opacity:1;color:var(--primary)}
.sidebar-foot{
  flex:none;
  padding:18px 18px 24px;
  border-top:1px solid var(--line);
}
.sidebar-note{
  margin-top:12px;
  font-size:12px;
  line-height:1.7;
  color:var(--text-3);
  text-align:center;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;
  border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;
  letter-spacing:.01em;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:var(--grad-primary);
  color:#04121A;
  box-shadow:0 8px 24px rgba(47,224,208,.22),var(--shadow-inner);
}
.btn-primary:hover{
  color:#04121A;
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(47,224,208,.5),0 14px 34px rgba(47,224,208,.34);
}
.btn-primary:active{transform:translateY(0);box-shadow:0 0 0 1px rgba(47,224,208,.4),0 6px 16px rgba(47,224,208,.24)}
.btn-ghost{
  background:var(--glass);
  color:var(--text-1);
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-inner);
}
.btn-ghost:hover{
  color:var(--primary);
  border-color:rgba(47,224,208,.55);
  transform:translateY(-2px);
  box-shadow:0 10px 26px rgba(0,0,0,.35);
}
.btn-ghost:active{transform:translateY(0)}
.btn-block{width:100%}

/* ---------- 主内容 ---------- */
.main{
  position:relative;
  z-index:1;
  margin-left:var(--sidebar-w);
  padding:0 48px;
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
}
.topbar{display:none}
.drawer{display:none}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:36px 0 0;
  font-size:13px;
  color:var(--text-3);
}
.crumb a{color:var(--text-3)}
.crumb a:hover{color:var(--primary)}
.crumb .sep{opacity:.45}
.crumb .current{color:var(--text-2);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章主体 ---------- */
.article-wrap{
  width:100%;
  max-width:860px;
  margin:0 auto;
  padding-bottom:8px;
}
.article-head{
  padding:26px 0 36px;
  border-bottom:1px solid var(--line);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:28px;padding:0 14px;
  border-radius:var(--radius-badge);
  font-size:12px;font-weight:600;letter-spacing:.04em;
  color:var(--primary);
  background:rgba(47,224,208,.12);
  border:1px solid rgba(47,224,208,.3);
}
.article-title{
  margin:18px 0 20px;
  font-size:clamp(28px,3.6vw,44px);
  font-weight:800;
  line-height:1.22;
  letter-spacing:-.5px;
  color:var(--text-1);
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:13px;
  color:var(--text-3);
}
.article-meta .divider{width:1px;height:12px;background:var(--line-strong);display:inline-block}
.article-meta strong{color:var(--text-2);font-weight:600}

.prose{
  padding-top:36px;
  font-size:17px;
  line-height:1.95;
  color:var(--text-2);
  word-wrap:break-word;
  overflow-wrap:break-word;
}
.prose > *:first-child{margin-top:0}
.prose p{margin:0 0 18px}
.prose h2{
  position:relative;
  margin:40px 0 18px;
  padding-left:16px;
  font-size:clamp(22px,2.2vw,28px);
  font-weight:700;
  line-height:1.4;
  color:var(--text-1);
}
.prose h2::before{
  content:"";
  position:absolute;left:0;top:6px;bottom:6px;width:4px;
  border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 14px rgba(47,224,208,.65);
}
.prose h3{
  margin:30px 0 12px;
  font-size:20px;
  font-weight:600;
  line-height:1.45;
  color:var(--text-1);
}
.prose h4{
  margin:24px 0 10px;
  font-size:17px;
  font-weight:600;
  color:var(--text-1);
}
.prose a{color:var(--primary);border-bottom:1px solid rgba(47,224,208,.35)}
.prose a:hover{border-bottom-color:var(--primary)}
.prose strong{color:var(--text-1);font-weight:700}
.prose blockquote{
  margin:26px 0;
  padding:18px 20px;
  border-left:2px solid var(--primary);
  border-radius:var(--radius-card);
  background:var(--glass);
  color:var(--text-2);
  box-shadow:var(--shadow-inner);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{
  width:auto;max-width:100%;
  height:auto;
  margin:26px auto;
  border-radius:var(--radius-img);
  border:1px solid var(--line);
}
.prose figure{margin:26px 0}
.prose figcaption{
  margin-top:10px;
  font-size:13px;
  color:var(--text-3);
  text-align:center;
}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px}
.prose ul li{position:relative;list-style:none;padding-left:16px;margin:8px 0;line-height:1.9}
.prose ul li::before{
  content:"";
  position:absolute;left:0;top:.85em;
  width:6px;height:6px;border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 8px rgba(47,224,208,.6);
}
.prose ol{counter-reset:prose-ol}
.prose ol li{position:relative;list-style:none;padding-left:26px;margin:8px 0;line-height:1.9;counter-increment:prose-ol}
.prose ol li::before{
  content:counter(prose-ol);
  position:absolute;left:0;top:0;
  width:20px;height:20px;
  display:grid;place-items:center;
  font-size:12px;font-weight:700;
  color:var(--primary);
  border:1px solid rgba(47,224,208,.35);
  border-radius:6px;
  margin-top:.32em;
}
.prose table{
  width:100%;
  margin:26px 0;
  border-collapse:collapse;
  font-size:15px;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  overflow:hidden;
}
.prose thead th{
  background:rgba(122,190,255,.08);
  color:var(--text-1);
  font-weight:600;
  text-align:left;
}
.prose th,.prose td{
  padding:12px 16px;
  border-bottom:1px solid var(--line);
  line-height:1.7;
}
.prose tbody tr:last-child td{border-bottom:0}
.prose code{
  padding:2px 6px;
  font-size:14px;
  border-radius:6px;
  background:rgba(122,190,255,.1);
  color:var(--primary);
}
.prose hr{border:0;height:1px;background:var(--line);margin:34px 0}

/* ---------- 空态 ---------- */
.empty-state{
  margin:56px auto;
  max-width:620px;
  padding:56px 32px;
  text-align:center;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--shadow-inner);
}
.empty-state .empty-icon{
  width:64px;height:64px;margin:0 auto 22px;
  display:grid;place-items:center;
  border-radius:50%;
  color:var(--primary);
  background:rgba(47,224,208,.1);
  border:1px solid rgba(47,224,208,.28);
}
.empty-state .empty-icon svg{width:28px;height:28px}
.empty-state h1{
  font-size:clamp(24px,3vw,32px);
  font-weight:800;
  line-height:1.3;
  margin-bottom:12px;
}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:26px}

/* ---------- 相关推荐 ---------- */
.related{
  margin-top:64px;
  padding-top:44px;
  border-top:1px solid var(--line);
}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:24px;
}
.section-head h2{
  font-size:clamp(22px,2.2vw,28px);
  font-weight:700;
  line-height:1.3;
  letter-spacing:-.2px;
}
.section-head p{
  font-size:14px;
  color:var(--text-3);
  margin-top:6px;
}
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.note-card{
  display:flex;flex-direction:column;
  padding:16px;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--shadow-inner);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.note-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 18px 44px rgba(0,0,0,.5),0 0 0 1px rgba(47,224,208,.28);
}
.note-card .thumb{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  border-radius:var(--radius-img);
  border:1px solid var(--line);
  background:var(--bg-2);
}
.note-card .thumb img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.note-card:hover .thumb img{transform:scale(1.03)}
.note-card .thumb::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 45%,rgba(5,10,20,.72));
  opacity:.55;
  transition:opacity .3s var(--ease);
}
.note-card:hover .thumb::after{opacity:.8}
.note-card .card-body{padding:16px 4px 0;display:flex;flex-direction:column;flex:1}
.note-card h3{
  font-size:17px;
  font-weight:600;
  line-height:1.45;
  color:var(--text-1);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:8px;
}
.note-card p{
  font-size:14px;
  line-height:1.75;
  color:var(--text-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:16px;
}
.note-card .card-foot{
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--line);
  font-size:13px;
  font-weight:600;
  color:var(--primary);
  display:flex;align-items:center;gap:6px;
}
.note-card .card-foot span{transition:transform .2s var(--ease)}
.note-card:hover .card-foot span{transform:translateX(4px)}
.related-actions{
  margin-top:48px;
  display:flex;flex-wrap:wrap;gap:16px;
}

/* ---------- CTA 横带 ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  margin:80px 0 88px;
  padding:36px 40px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card),var(--shadow-inner);
}
.cta-band::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:var(--grad-primary);
  opacity:.75;
}
.cta-band::after{
  content:"";
  position:absolute;right:-90px;top:-120px;
  width:320px;height:320px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,224,208,.16),transparent 68%);
  pointer-events:none;
}
.cta-band h2{
  font-size:clamp(20px,2.2vw,26px);
  font-weight:700;
  line-height:1.35;
  margin-bottom:8px;
}
.cta-band p{
  font-size:14px;
  color:var(--text-2);
  max-width:560px;
}
.cta-band .cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:1}

/* ---------- 页脚 ---------- */
.footer{
  margin-top:auto;
  padding:56px 0 0;
  background:#04080F;
  border-top:1px solid transparent;
  position:relative;
}
.footer::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,208,.55),rgba(76,111,255,.45),transparent);
}
.footer .container{max-width:1280px}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  font-size:18px;font-weight:800;letter-spacing:-.2px;
  margin-bottom:14px;
}
.footer-brand .brand-mark{width:32px;height:32px;border-radius:10px}
.footer-brand .brand-mark svg{width:17px;height:17px}
.footer-desc{
  font-size:14px;
  line-height:1.85;
  color:var(--text-3);
  max-width:340px;
}
.footer h4{
  font-size:14px;
  font-weight:700;
  color:var(--text-1);
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{
  font-size:14px;
  color:var(--text-2);
  transition:color .18s var(--ease),transform .18s var(--ease);
  width:fit-content;
}
.footer-links a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:13px;color:var(--text-3);line-height:1.7}
.footer-contact strong{display:block;color:var(--text-2);font-weight:600;font-size:13px;margin-bottom:2px}
.footer-bottom{
  padding:20px 0 26px;
  border-top:1px solid var(--line);
  text-align:center;
  font-size:12px;
  color:var(--text-3);
  letter-spacing:.02em;
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;
  right:24px;bottom:24px;
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:50%;
  color:var(--primary);
  background:rgba(12,26,44,.85);
  border:1px solid var(--line-strong);
  box-shadow:0 12px 28px rgba(0,0,0,.45);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;
  transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  z-index:55;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:#04121A;background:var(--primary);border-color:transparent}

/* ---------- 响应式 ---------- */
@media (max-width:1399px){
  .main{padding:0 40px}
}
@media (max-width:1199px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:1023px){
  :root{--sidebar-w:88px}
  .sidebar-brand{padding:0;justify-content:center}
  .brand-text{display:none}
  .nav-item{justify-content:center;padding:0;height:48px}
  .nav-label{display:none}
  .sidebar-foot{padding:14px 10px 20px}
  .sidebar-foot .btn{height:42px;padding:0;font-size:0}
  .sidebar-foot .btn svg{width:18px;height:18px}
  .sidebar-note{display:none}
  .main{padding:0 28px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{padding:30px 26px}
}
@media (max-width:767px){
  .sidebar{display:none}
  .topbar{
    display:flex;
    position:fixed;top:0;left:0;right:0;height:64px;
    align-items:center;justify-content:space-between;
    padding:0 16px;
    background:rgba(6,12,22,.94);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    z-index:80;
  }
  .topbar .brand-mark{width:32px;height:32px;border-radius:10px}
  .topbar .brand-mark svg{width:17px;height:17px}
  .topbar-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800;letter-spacing:-.2px}
  .burger{
    width:42px;height:42px;
    display:grid;place-items:center;
    border-radius:var(--radius-btn);
    border:1px solid var(--line-strong);
    background:var(--glass);
    color:var(--text-1);
  }
  .burger svg{width:20px;height:20px}
  .drawer{
    display:flex;
    position:fixed;inset:0;
    z-index:79;
    flex-direction:column;
    padding:88px 24px 28px;
    background:rgba(5,10,20,.94);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    opacity:0;
    visibility:hidden;
    transform:translateY(-12px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s;
  }
  .drawer.open{opacity:1;visibility:visible;transform:translateY(0)}
  .drawer .nav-item{
    height:auto;
    justify-content:flex-start;
    padding:16px 6px;
    font-size:20px;
    font-weight:600;
    border-radius:0;
    border-bottom:1px solid var(--line);
    gap:14px;
  }
  .drawer .nav-label{display:inline}
  .drawer .nav-item::before{display:none}
  .drawer .btn{margin-top:auto}
  .main{margin-left:0;padding:76px 18px 0}
  .crumb{padding-top:22px;font-size:12px}
  .crumb .current{max-width:100%;white-space:normal}
  .article-head{padding:20px 0 28px}
  .article-title{margin:14px 0 16px}
  .prose{padding-top:28px;font-size:16px;line-height:1.9}
  .prose h2{margin:32px 0 14px;font-size:22px}
  .prose h3{font-size:18px}
  .prose table{display:block;overflow-x:auto;white-space:nowrap;font-size:14px}
  .card-grid{grid-template-columns:1fr}
  .cta-band{margin:56px 0 64px;padding:26px 20px;flex-direction:column;align-items:flex-start}
  .cta-band .cta-actions{width:100%}
  .cta-band .cta-actions .btn{flex:1}
  .related{margin-top:48px;padding-top:34px}
  .related-actions .btn{flex:1}
  .footer{padding-top:44px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-desc{max-width:100%}
  .to-top{right:16px;bottom:18px;width:42px;height:42px}
}
@media (max-width:520px){
  .main{padding-left:16px;padding-right:16px}
  .article-meta{gap:10px;font-size:12px}
  .empty-state{padding:40px 20px}
  .cta-band .cta-actions{flex-direction:column}
  .related-actions{flex-direction:column}
  .related-actions .btn{width:100%}
}

/* roulang page: category1 */
:root{
  --bg-0:#050A14;
  --bg-1:#081120;
  --bg-2:#0C1A2C;
  --line:rgba(122,190,255,.14);
  --line-strong:rgba(122,190,255,.28);
  --text-1:#EAF2FF;
  --text-2:#A8BAD2;
  --text-3:#6C82A0;
  --primary:#2FE0D0;
  --primary-deep:#0E8F8B;
  --accent:#4C6FFF;
  --warm:#FFB03A;
  --grad-primary:linear-gradient(135deg,#2FE0D0,#4C6FFF);
  --glass:rgba(140,200,255,.055);
  --r-card:18px;
  --r-btn:12px;
  --r-input:12px;
  --r-img:16px;
  --r-badge:999px;
  --r-faq:14px;
  --shadow-card:0 16px 40px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(47,224,208,.35),0 8px 30px rgba(47,224,208,.22);
  --side-w:248px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{background:var(--bg-0);-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:transparent;
  color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(760px 560px at 82% -8%, rgba(47,224,208,.15), transparent 72%),
    radial-gradient(700px 560px at 6% 22%, rgba(76,111,255,.14), transparent 72%),
    radial-gradient(640px 480px at 58% 96%, rgba(255,176,58,.055), transparent 75%),
    linear-gradient(rgba(122,190,255,.045) 1px, transparent 1px) 0 0/72px 72px,
    linear-gradient(90deg, rgba(122,190,255,.045) 1px, transparent 1px) 0 0/72px 72px,
    var(--bg-0);
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
::selection{background:rgba(47,224,208,.28);color:#fff}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px}

/* ---------- 左侧导航 ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;
  width:var(--side-w);
  height:100vh;
  display:flex;
  flex-direction:column;
  background:rgba(6,12,22,.84);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  z-index:50;
}
.sidebar::after{
  content:"";
  position:absolute;
  top:0;right:0;
  width:1px;height:100%;
  background:linear-gradient(180deg,transparent,rgba(122,190,255,.26),transparent);
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  height:88px;
  padding:0 20px;
  flex:none;
}
.brand-mark{
  width:34px;height:34px;
  flex:none;
  display:grid;
  place-items:center;
  border-radius:11px;
  background:var(--grad-primary);
  color:#04121A;
  box-shadow:0 6px 18px rgba(47,224,208,.3);
}
.brand-mark svg{width:19px;height:19px}
.brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0}
.brand-name{font-size:18px;font-weight:800;letter-spacing:-.2px;white-space:nowrap}
.brand-sub{font-size:11px;color:var(--text-3);margin-top:4px;white-space:nowrap}

.nav-list{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding:8px 12px;
  overflow-y:auto;
  flex:1 1 auto;
}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  height:44px;
  padding:0 14px;
  border-radius:12px;
  color:var(--text-2);
  font-size:15px;
  transition:background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-item svg{width:20px;height:20px;flex:none}
.nav-item:hover{background:var(--glass);color:var(--primary)}
.nav-item.active{
  background:var(--glass);
  color:var(--text-1);
  box-shadow:inset 0 0 0 1px var(--line);
}
.nav-item.active::before{
  content:"";
  position:absolute;
  left:0;top:9px;bottom:9px;
  width:3px;
  border-radius:3px;
  background:var(--primary);
  box-shadow:0 0 12px rgba(47,224,208,.75);
}
.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

.side-foot{
  flex:none;
  padding:16px;
  border-top:1px solid var(--line);
  margin-top:auto;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:700;
  white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{
  background:var(--grad-primary);
  color:#04121A;
  font-weight:800;
  box-shadow:0 8px 26px rgba(47,224,208,.24);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.07);box-shadow:0 14px 34px rgba(47,224,208,.4)}
.btn-primary:active{transform:translateY(0);filter:brightness(.98);box-shadow:0 4px 14px rgba(47,224,208,.3)}
.btn-ghost{
  background:var(--glass);
  border:1px solid var(--line-strong);
  color:var(--text-1);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--primary);color:var(--primary);box-shadow:0 10px 26px rgba(47,224,208,.16)}
.btn-ghost:active{transform:translateY(0)}
.btn-block{width:100%}
.side-tip{
  margin-top:12px;
  font-size:11px;
  line-height:1.7;
  color:var(--text-3);
}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:64px;
  z-index:60;
  align-items:center;
  justify-content:space-between;
  padding:0 18px;
  background:rgba(5,10,20,.88);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
}
.topbar .brand{height:64px;padding:0;gap:8px}
.topbar .brand-name{font-size:16px}
.topbar .brand-sub{display:none}
.menu-btn{
  width:42px;height:42px;
  display:grid;place-items:center;
  border-radius:var(--r-btn);
  border:1px solid var(--line);
  background:var(--glass);
  color:var(--text-1);
  transition:.2s var(--ease);
}
.menu-btn:hover{border-color:var(--primary);color:var(--primary)}
.menu-btn svg{width:20px;height:20px}

.drawer{
  position:fixed;
  inset:0;
  z-index:70;
  display:flex;
  flex-direction:column;
  padding:84px 24px 28px;
  background:rgba(5,10,20,.94);
  backdrop-filter:blur(20px);
  -webkit-backdrop-filter:blur(20px);
  opacity:0;
  transform:translateY(-10px);
  pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.drawer.open{opacity:1;transform:none;pointer-events:auto}
.drawer .drawer-close{
  position:absolute;
  top:16px;right:18px;
  width:42px;height:42px;
  display:grid;place-items:center;
  border-radius:var(--r-btn);
  border:1px solid var(--line);
  color:var(--text-1);
}
.drawer nav{display:flex;flex-direction:column}
.drawer .nav-item{
  height:auto;
  padding:18px 0;
  font-size:20px;
  border-radius:0;
  border-bottom:1px solid var(--line);
  background:none;
  box-shadow:none;
  color:var(--text-2);
}
.drawer .nav-item.active{color:var(--primary);background:none;box-shadow:none}
.drawer .nav-item.active::before{display:none}
.drawer .drawer-foot{margin-top:auto;padding-top:24px}

/* ---------- 主内容 ---------- */
.app-main{
  margin-left:var(--side-w);
  padding:0 40px 0;
  min-height:60vh;
}
.container{width:100%;max-width:1280px;margin:0 auto}

.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  padding:28px 0 0;
  font-size:13px;
  color:var(--text-3);
}
.breadcrumb a{color:var(--text-2);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:var(--text-3)}

.page-head{
  position:relative;
  margin-top:20px;
  min-height:280px;
  display:grid;
  grid-template-columns:1.25fr .75fr;
  gap:32px;
  align-items:center;
  padding:44px 44px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(12,26,44,.92),rgba(8,17,32,.7));
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.page-head::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,208,.7),rgba(76,111,255,.5),transparent);
}
.page-head-copy{position:relative;z-index:2;max-width:620px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border-radius:var(--r-badge);
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--primary);
  background:rgba(47,224,208,.1);
  border:1px solid rgba(47,224,208,.3);
  margin-bottom:18px;
}
.page-head h1{
  font-size:clamp(30px,4vw,54px);
  font-weight:800;
  line-height:1.15;
  letter-spacing:-.5px;
}
.page-head .lead{
  margin-top:16px;
  font-size:14px;
  line-height:1.85;
  color:var(--text-2);
  max-width:560px;
}
.page-head-media{
  position:relative;
  z-index:1;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:0 18px 44px rgba(0,0,0,.5);
  align-self:stretch;
  min-height:200px;
}
.page-head-media img{
  width:100%;height:100%;
  min-height:200px;
  object-fit:cover;
  opacity:.75;
  transition:transform .3s var(--ease),opacity .3s var(--ease);
}
.page-head-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,20,.15),rgba(5,10,20,.7));
}
.page-head-media:hover img{transform:scale(1.03);opacity:.88}

/* ---------- 板块 ---------- */
.section{margin-top:96px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:34px;flex-wrap:wrap}
.h2{
  font-size:clamp(24px,2.4vw,36px);
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.3px;
}
.section-sub{margin-top:10px;font-size:14px;color:var(--text-3);max-width:640px}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--primary);
  transition:gap .2s var(--ease),color .2s var(--ease);
}
.text-link:hover{gap:12px;color:#7FF0E4}

/* 图文交错 */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:44px;
  align-items:center;
}
.split + .split{margin-top:56px}
.split.reverse .split-media{order:2}
.split-media{
  position:relative;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.split-media img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.split-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,10,20,.05),rgba(5,10,20,.42));
  pointer-events:none;
}
.split-media:hover img{transform:scale(1.03)}
.split-body h3{
  font-size:22px;
  font-weight:600;
  line-height:1.4;
  margin-bottom:14px;
}
.split-body p{
  font-size:16px;
  line-height:1.9;
  color:var(--text-2);
  margin-bottom:16px;
}
.check-list{display:flex;flex-direction:column;gap:12px;margin-top:8px}
.check-list li{
  position:relative;
  padding-left:22px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 10px rgba(47,224,208,.7);
}

/* 数据条 */
.stat-band{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  overflow:hidden;
}
.stat{padding:30px 26px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat-num{
  font-size:clamp(36px,4vw,56px);
  font-weight:700;
  line-height:1;
  letter-spacing:-1.5px;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(135deg,#2FE0D0,#8AF2E6 45%,#4C6FFF);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.stat-num.is-warm{
  background:linear-gradient(135deg,#FFB03A,#FFD48A);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.stat-label{margin-top:12px;font-size:13px;color:var(--text-3);line-height:1.7}

/* 参数表 */
.table-wrap{
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--bg-2);
  box-shadow:var(--shadow-card);
  overflow-x:auto;
}
.spec-table{width:100%;min-width:720px;border-collapse:collapse;font-size:15px}
.spec-table thead th{
  text-align:left;
  padding:16px 22px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.05em;
  color:var(--text-1);
  background:rgba(122,190,255,.08);
  border-bottom:1px solid var(--line-strong);
  white-space:nowrap;
}
.spec-table tbody td{
  padding:16px 22px;
  color:var(--text-2);
  border-bottom:1px solid rgba(122,190,255,.08);
  line-height:1.7;
}
.spec-table tbody td:first-child{color:var(--text-1);font-weight:600}
.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table tbody tr{transition:background .2s var(--ease)}
.spec-table tbody tr:hover{background:rgba(47,224,208,.045)}
.spec-table tbody tr:hover td{color:var(--text-1)}

/* FAQ */
.faq{max-width:860px}
.faq-item{
  border-radius:var(--r-faq);
  border:1px solid var(--line);
  background:var(--glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px;
  font-size:17px;
  font-weight:600;
  line-height:1.5;
  cursor:pointer;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";
  flex:none;
  font-size:22px;
  font-weight:400;
  color:var(--primary);
  line-height:1;
  transition:transform .2s var(--ease);
}
.faq-item[open]{
  border-color:rgba(47,224,208,.4);
  box-shadow:inset 3px 0 0 var(--primary),0 12px 30px rgba(0,0,0,.35);
}
.faq-item[open] summary::after{content:"−"}
.faq-a{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}

/* CTA 横向条 */
.cta-band{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
  padding:34px 38px;
  border-radius:var(--r-card);
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(47,224,208,.13),rgba(76,111,255,.13));
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.08);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,208,.8),transparent);
}
.cta-band h2{font-size:clamp(20px,2vw,26px);font-weight:700;line-height:1.35}
.cta-band p{margin-top:8px;font-size:14px;color:var(--text-2);max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 内链卡片 */
.link-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.link-card{
  display:flex;
  flex-direction:column;
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--bg-2);
  border:1px solid var(--line);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.link-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-glow)}
.link-card figure{margin:0;overflow:hidden;border-bottom:1px solid var(--line)}
.link-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .3s var(--ease)}
.link-card:hover img{transform:scale(1.03)}
.link-card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.link-card h3{font-size:18px;font-weight:600;line-height:1.4}
.link-card p{font-size:14px;line-height:1.8;color:var(--text-2)}
.link-card .card-go{margin-top:auto;font-size:13px;font-weight:600;color:var(--primary)}
.return-home{margin-top:26px;font-size:14px;color:var(--text-3)}
.return-home a{color:var(--primary);font-weight:600}
.return-home a:hover{text-decoration:underline}

/* ---------- 页脚 ---------- */
.footer{
  margin-left:var(--side-w);
  margin-top:96px;
  padding:0 40px;
  background:#04080F;
  border-top:1px solid var(--line);
  position:relative;
}
.footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,208,.5),rgba(76,111,255,.35),transparent);
}
.footer .container{padding:64px 0 0}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:44px;
  padding-bottom:48px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:800;
  letter-spacing:-.2px;
  margin-bottom:16px;
}
.footer-brand .brand-mark{width:32px;height:32px;border-radius:10px}
.footer-brand .brand-mark svg{width:17px;height:17px}
.footer-desc{font-size:14px;line-height:1.9;color:var(--text-2);max-width:340px}
.footer h4{font-size:14px;font-weight:700;color:var(--text-1);margin-bottom:16px;letter-spacing:.04em}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{
  display:inline-block;
  font-size:14px;
  color:var(--text-2);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-links a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact div{
  font-size:13px;
  line-height:1.85;
  color:var(--text-2);
  margin-bottom:12px;
}
.footer-contact strong{color:var(--text-1);font-weight:600;margin-right:6px}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0;
  text-align:center;
  font-size:12px;
  color:var(--text-3);
}

/* 回到顶部 */
.to-top{
  position:fixed;
  right:26px;bottom:26px;
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:50%;
  border:1px solid var(--line-strong);
  background:rgba(12,26,44,.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  color:var(--text-1);
  opacity:0;
  transform:translateY(12px);
  pointer-events:none;
  transition:opacity .24s var(--ease),transform .24s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
  z-index:55;
}
.to-top.show{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{border-color:var(--primary);color:var(--primary);box-shadow:0 0 0 1px rgba(47,224,208,.3),0 8px 24px rgba(47,224,208,.22)}
.to-top svg{width:18px;height:18px}

/* ---------- 断点 ---------- */
@media (min-width:1024px) and (max-width:1399px){
  .app-main{padding:0 32px}
  .footer{padding:0 32px}
}
@media (min-width:768px) and (max-width:1023px){
  :root{--side-w:88px}
  .brand{padding:0;justify-content:center}
  .brand-text{display:none}
  .nav-list{padding:8px 10px;align-items:center}
  .nav-item{justify-content:center;padding:0;width:56px;gap:0}
  .nav-label{display:none}
  .side-foot{padding:12px 10px}
  .side-foot .btn{padding:0;width:52px;height:48px}
  .side-foot .btn .btn-text{display:none}
  .side-tip{display:none}
  .app-main{padding:0 28px}
  .footer{padding:0 28px}
  .page-head{grid-template-columns:1fr .8fr;padding:34px 30px;min-height:240px}
  .split{gap:28px}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(3){border-left:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .link-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767px){
  .sidebar{display:none}
  .topbar{display:flex}
  .app-main{margin-left:0;padding:64px 18px 0}
  .footer{margin-left:0;margin-top:64px;padding:0 18px}
  .breadcrumb{padding:20px 0 0;font-size:12px}
  .page-head{
    grid-template-columns:1fr;
    min-height:200px;
    padding:28px 22px;
    gap:22px;
  }
  .page-head-media{min-height:170px}
  .page-head-media img{min-height:170px}
  .section{margin-top:56px}
  .section-head{margin-bottom:24px}
  .split{grid-template-columns:1fr;gap:22px}
  .split.reverse .split-media{order:0}
  .split + .split{margin-top:40px}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .stat{padding:22px 18px}
  .stat:nth-child(3){border-left:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .link-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:36px}
  .footer .container{padding:48px 0 0}
  .cta-band{padding:26px 22px;flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:520px){
  .page-head h1{font-size:30px}
  .stat-band{grid-template-columns:1fr}
  .stat{border-left:0;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:0}
  .faq-item summary{font-size:16px;padding:16px}
  .faq-a{padding:0 16px 16px}
  .spec-table{min-width:600px}
}

/* roulang page: category2 */
:root{
  --bg-0:#050A14;--bg-1:#081120;--bg-2:#0C1A2C;
  --line:rgba(122,190,255,.14);--line-strong:rgba(122,190,255,.28);
  --text-1:#EAF2FF;--text-2:#A8BAD2;--text-3:#6C82A0;
  --primary:#2FE0D0;--primary-deep:#0E8F8B;--accent:#4C6FFF;--warm:#FFB03A;
  --grad-primary:linear-gradient(135deg,#2FE0D0,#4C6FFF);
  --glass:rgba(140,200,255,.055);
  --r-card:18px;--r-btn:12px;--r-input:12px;--r-img:16px;--r-badge:999px;--r-faq:14px;
  --shadow-card:0 16px 40px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(47,224,208,.35),0 8px 30px rgba(47,224,208,.22);
  --sidebar-w:248px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background-color:var(--bg-0);color:var(--text-1);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;line-height:1.85;letter-spacing:.1px;
  background-image:
    radial-gradient(900px 680px at 88% -8%,rgba(47,224,208,.12),transparent 62%),
    radial-gradient(820px 620px at 6% 18%,rgba(76,111,255,.13),transparent 64%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(122,190,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,190,255,.05) 1px,transparent 1px);
  background-size:64px 64px;opacity:.7;
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    radial-gradient(1.5px 1.5px at 18% 22%,rgba(234,242,255,.30),transparent 100%),
    radial-gradient(1.5px 1.5px at 72% 12%,rgba(47,224,208,.35),transparent 100%),
    radial-gradient(1.5px 1.5px at 42% 68%,rgba(234,242,255,.22),transparent 100%),
    radial-gradient(1.5px 1.5px at 90% 54%,rgba(76,111,255,.34),transparent 100%),
    radial-gradient(1.5px 1.5px at 8% 82%,rgba(234,242,255,.20),transparent 100%),
    radial-gradient(1.5px 1.5px at 56% 92%,rgba(255,176,58,.24),transparent 100%);
  opacity:.85;
}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.28;letter-spacing:-.2px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color 180ms var(--ease)}
button{font-family:inherit}
a:focus-visible,button:focus-visible,.chip:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:10px}
::selection{background:rgba(47,224,208,.3);color:#fff}

/* ---------- 布局 ---------- */
.main{margin-left:var(--sidebar-w);position:relative;z-index:1}
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 48px}
.section{padding:88px 0;position:relative}
.section-alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{margin-bottom:40px;max-width:760px}
.section-head h2{font-size:clamp(24px,2.4vw,34px);font-weight:700;line-height:1.25}
.section-head .section-sub{margin-top:12px;font-size:14px;color:var(--text-2);line-height:1.8}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.16em;color:var(--primary);text-transform:uppercase;font-weight:700;margin-bottom:14px;font-family:"Barlow Semi Condensed",system-ui,sans-serif}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--primary);box-shadow:0 0 8px rgba(47,224,208,.8)}

/* ---------- 侧边导航 ---------- */
.sidebar{
  position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;z-index:40;
  display:flex;flex-direction:column;padding:0 16px 20px;
  background:rgba(6,14,26,.74);
  -webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);
}
.sidebar::after{
  content:"";position:absolute;top:0;right:0;width:1px;height:100%;
  background:linear-gradient(180deg,transparent,rgba(122,190,255,.30) 28%,rgba(122,190,255,.30) 72%,transparent);
}
.sidebar-brand{height:88px;display:flex;align-items:center;gap:11px;padding:0 4px;flex:none}
.brand-mark{
  width:36px;height:36px;flex:none;display:grid;place-items:center;border-radius:11px;
  background:linear-gradient(135deg,rgba(47,224,208,.22),rgba(76,111,255,.20));
  border:1px solid rgba(47,224,208,.35);color:var(--primary);
  box-shadow:0 0 18px rgba(47,224,208,.18) inset;
}
.brand-mark svg{width:19px;height:19px}
.brand-text{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.brand-text strong{font-size:18px;font-weight:800;letter-spacing:-.2px;white-space:nowrap}
.brand-text em{font-style:normal;font-size:11px;color:var(--text-3);letter-spacing:.05em;white-space:nowrap}
.nav-list{display:flex;flex-direction:column;gap:4px;padding:6px 0;flex:1;overflow-y:auto;scrollbar-width:thin}
.nav-item{
  position:relative;display:flex;align-items:center;gap:12px;height:44px;
  padding:0 12px 0 20px;border-radius:12px;color:var(--text-2);font-size:15px;
  transition:background 180ms var(--ease),color 180ms var(--ease);
}
.nav-item svg{width:18px;height:18px;flex:none;opacity:.85;transition:opacity 180ms var(--ease)}
.nav-item:hover{background:var(--glass);color:var(--primary)}
.nav-item:hover svg{opacity:1}
.nav-item.active{background:var(--glass);color:var(--text-1);font-weight:600}
.nav-item.active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:3px;
  background:var(--primary);box-shadow:0 0 12px rgba(47,224,208,.75);
}
.nav-item.active svg{color:var(--primary);opacity:1}
.sidebar-foot{flex:none;padding-top:14px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px}
.sidebar-note{font-size:11px;color:var(--text-3);text-align:center;line-height:1.7}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform 200ms var(--ease),box-shadow 220ms var(--ease),background 200ms var(--ease),color 200ms var(--ease),border-color 200ms var(--ease),filter 200ms var(--ease);
}
.btn-sm{padding:10px 16px;font-size:13.5px;border-radius:10px}
.btn-primary{background:var(--grad-primary);color:#04121A;box-shadow:0 8px 24px rgba(47,224,208,.22)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 12px 32px rgba(47,224,208,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px rgba(47,224,208,.26)}
.btn-ghost{background:var(--glass);color:var(--text-1);border-color:var(--line-strong)}
.btn-ghost:hover{color:var(--primary);border-color:rgba(47,224,208,.5);transform:translateY(-2px);box-shadow:0 10px 26px rgba(0,0,0,.35)}
.btn-ghost:active{transform:translateY(0)}
.btn-block{width:100%}

/* ---------- 移动顶栏与抽屉 ---------- */
.topbar{display:none}
.drawer{display:none}
@media (max-width:767px){
  .topbar{
    display:flex;position:fixed;top:0;left:0;right:0;height:64px;z-index:70;
    align-items:center;justify-content:space-between;padding:0 18px;
    background:rgba(6,14,26,.88);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .topbar-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800}
  .topbar-brand .brand-mark{width:32px;height:32px;border-radius:10px}
  .topbar-brand .brand-mark svg{width:17px;height:17px}
  .menu-btn{
    width:44px;height:44px;display:grid;place-items:center;border-radius:12px;
    background:var(--glass);border:1px solid var(--line-strong);color:var(--text-1);cursor:pointer;
    transition:color 180ms var(--ease),border-color 180ms var(--ease);
  }
  .menu-btn:hover{color:var(--primary);border-color:rgba(47,224,208,.45)}
  .menu-btn svg{width:20px;height:20px}
  .drawer{
    position:fixed;inset:0;z-index:60;display:none;flex-direction:column;
    background:rgba(5,10,20,.94);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);
    padding:80px 22px 120px;overflow-y:auto;
  }
  .drawer.open{display:flex;animation:drawerIn 240ms var(--ease)}
  @keyframes drawerIn{from{opacity:0;transform:translateY(-14px)}to{opacity:1;transform:translateY(0)}}
  .drawer .nav-list{overflow:visible}
  .drawer .nav-item{height:auto;padding:16px 10px;font-size:19px;gap:14px;border-radius:12px}
  .drawer .nav-item svg{width:22px;height:22px}
  .drawer-cta{position:fixed;left:0;right:0;bottom:0;padding:16px 22px 26px;background:linear-gradient(180deg,transparent,rgba(5,10,20,.98) 45%)}
}

/* ---------- 面包屑与页头 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;font-size:13px;color:var(--text-3);margin-bottom:24px}
.crumb a{color:var(--text-2)}
.crumb a:hover{color:var(--primary)}
.crumb span.sep{opacity:.5}
.crumb .current{color:var(--text-3)}
.pagehead{position:relative;padding:60px 0 56px;overflow:hidden;border-bottom:1px solid var(--line)}
.pagehead::before{
  content:"";position:absolute;top:-180px;right:-120px;width:620px;height:620px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,224,208,.16),transparent 66%);pointer-events:none;
}
.pagehead-grid{display:grid;grid-template-columns:1.32fr .88fr;gap:52px;align-items:center;position:relative}
.pagehead h1{font-size:clamp(30px,4vw,50px);font-weight:800;line-height:1.15;letter-spacing:-.5px}
.pagehead h1 .hl{
  background:linear-gradient(120deg,#2FE0D0,#7FB4FF 60%,#FFB03A);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.pagehead .lead{margin-top:18px;font-size:15px;line-height:1.85;color:var(--text-2);max-width:560px}
.pagehead .head-actions{margin-top:28px;display:flex;flex-wrap:wrap;gap:14px}
.pagehead-media{
  position:relative;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card);aspect-ratio:16/11;background:var(--bg-2);
}
.pagehead-media img{width:100%;height:100%;object-fit:cover}
.pagehead-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,20,.05) 30%,rgba(5,10,20,.72));}
.pagehead-media::before{content:"";position:absolute;inset:0;border-radius:var(--r-img);box-shadow:inset 0 0 0 1px rgba(47,224,208,.22);z-index:2}
.pagehead-media .media-tag{
  position:absolute;left:16px;bottom:16px;z-index:3;display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:var(--r-badge);font-size:12.5px;color:var(--text-1);
  background:rgba(8,17,32,.72);border:1px solid rgba(47,224,208,.34);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.pagehead-media .media-tag i{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 10px var(--primary);font-style:normal}

/* ---------- 标签条 ---------- */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:36px}
.chip{
  display:inline-flex;align-items:center;gap:7px;padding:8px 18px;border-radius:var(--r-badge);
  font-size:13.5px;color:var(--text-2);background:var(--glass);border:1px solid var(--line);
  cursor:pointer;transition:color 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease),transform 200ms var(--ease);
}
.chip:hover{color:var(--primary);border-color:rgba(47,224,208,.45);transform:translateY(-2px)}
.chip.is-active{color:#04121A;background:var(--grad-primary);border-color:transparent;font-weight:700;box-shadow:0 6px 20px rgba(47,224,208,.24)}

/* ---------- 课程卡片 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.course-card{
  display:flex;flex-direction:column;overflow:hidden;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 1px 0 rgba(255,255,255,.05) inset;
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.course-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-card),0 0 26px rgba(47,224,208,.12)}
.course-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;border-bottom:1px solid var(--line);background:var(--bg-2)}
.course-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 300ms var(--ease)}
.course-card:hover .course-thumb img{transform:scale(1.03)}
.course-thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,20,0) 45%,rgba(5,10,20,.72))}
.course-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px}
.badge{
  display:inline-flex;align-items:center;padding:4px 12px;border-radius:var(--r-badge);
  font-size:12px;font-weight:600;color:var(--primary);
  background:rgba(47,224,208,.12);border:1px solid rgba(47,224,208,.30);
}
.badge-warm{color:var(--warm);background:rgba(255,176,58,.10);border-color:rgba(255,176,58,.30)}
.card-meta .time{color:var(--text-3);font-size:13px}
.course-body h3{font-size:20px;font-weight:600;line-height:1.4}
.course-body p{font-size:14.5px;color:var(--text-2);line-height:1.78}
.course-foot{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
}
.text-link{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.text-link::after{content:"→";transition:transform 200ms var(--ease)}
.text-link:hover{color:#7FF3E7}
.text-link:hover::after{transform:translateX(4px)}

/* ---------- 数据条 ---------- */
.stat-band{
  display:grid;grid-template-columns:repeat(4,1fr);
  border-radius:var(--r-card);overflow:hidden;
  background:var(--glass);border:1px solid var(--line);
  -webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);
  box-shadow:0 1px 0 rgba(255,255,255,.05) inset;
}
.stat-cell{padding:32px 26px;position:relative}
.stat-cell + .stat-cell::before{content:"";position:absolute;left:0;top:20px;bottom:20px;width:1px;background:var(--line)}
.stat-num{
  font-family:"Barlow Semi Condensed",system-ui,sans-serif;font-weight:700;font-variant-numeric:tabular-nums;
  font-size:clamp(40px,4vw,58px);line-height:1;letter-spacing:-.5px;color:var(--primary);
}
.stat-num em{font-style:normal;font-size:.42em;margin-left:4px;color:var(--text-2);font-weight:600}
.stat-cell:nth-child(2n) .stat-num{color:var(--warm)}
.stat-label{margin-top:12px;font-size:13px;color:var(--text-2);line-height:1.6}

/* ---------- 分栏列表 ---------- */
.plan-list{border-top:1px solid var(--line)}
.plan-row{
  position:relative;display:grid;grid-template-columns:64px 210px 1fr auto;gap:22px;align-items:center;
  padding:26px 18px 26px 20px;border-bottom:1px solid var(--line);
  transition:background 200ms var(--ease),transform 200ms var(--ease);
}
.plan-row::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:3px;
  background:var(--primary);opacity:0;box-shadow:0 0 14px rgba(47,224,208,.7);
  transition:opacity 200ms var(--ease);
}
.plan-row:hover{background:rgba(140,200,255,.04);transform:translateX(4px)}
.plan-row:hover::before{opacity:1}
.plan-no{font-family:"Barlow Semi Condensed",system-ui,sans-serif;font-size:26px;font-weight:700;color:var(--warm);letter-spacing:-.4px}
.plan-row h3{font-size:18px;font-weight:600}
.plan-row p{font-size:14.5px;color:var(--text-2);line-height:1.75}
.plan-row .text-link{justify-self:end;white-space:nowrap}

/* ---------- 非对称图文 ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.split-media{position:relative;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line-strong);box-shadow:var(--shadow-card);aspect-ratio:4/3;background:var(--bg-2)}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform 300ms var(--ease)}
.split-media:hover img{transform:scale(1.03)}
.split-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,10,20,0) 50%,rgba(5,10,20,.62))}
.split-text h2{font-size:clamp(24px,2.4vw,32px);line-height:1.3}
.split-text p{margin-top:16px;font-size:15px;color:var(--text-2);line-height:1.9}
.feature-list{margin-top:24px;display:flex;flex-direction:column;gap:14px}
.feature-list li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:var(--text-2);line-height:1.75}
.feature-list li::before{
  content:"";flex:none;width:7px;height:7px;margin-top:9px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 10px rgba(47,224,208,.8);transform:rotate(45deg);
}
.feature-list strong{color:var(--text-1);font-weight:600}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--r-faq);
  -webkit-backdrop-filter:blur(14px) saturate(140%);backdrop-filter:blur(14px) saturate(140%);
  overflow:hidden;transition:border-color 200ms var(--ease),box-shadow 200ms var(--ease);
}
.faq-item.open{border-color:rgba(47,224,208,.42);box-shadow:0 0 22px rgba(47,224,208,.12)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px;background:transparent;border:0;color:var(--text-1);
  font-size:17px;font-weight:600;text-align:left;cursor:pointer;line-height:1.5;
  transition:color 180ms var(--ease);
}
.faq-q:hover{color:var(--primary)}
.faq-icon{
  flex:none;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  border:1px solid var(--line-strong);color:var(--primary);font-size:16px;line-height:1;
  transition:transform 200ms var(--ease),background 200ms var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:rgba(47,224,208,.14)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease)}
.faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--text-2)}

/* ---------- 内链区 ---------- */
.link-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.link-card{
  display:flex;flex-direction:column;gap:10px;padding:24px 22px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.link-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-card),0 0 22px rgba(47,224,208,.10)}
.link-card .lk-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.link-card span.lk-arrow{color:var(--primary);font-size:15px;transition:transform 200ms var(--ease)}
.link-card:hover span.lk-arrow{transform:translateX(4px)}
.link-card h3{font-size:17px;font-weight:600;line-height:1.45}
.link-card p{font-size:13.5px;color:var(--text-3);line-height:1.7}

/* ---------- CTA 玻璃带 ---------- */
.cta-band{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  padding:36px 40px;border-radius:var(--r-card);
  background:linear-gradient(120deg,rgba(47,224,208,.12),rgba(76,111,255,.12));
  border:1px solid rgba(47,224,208,.28);
  box-shadow:var(--shadow-card),0 1px 0 rgba(255,255,255,.06) inset;
  overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,208,.85),rgba(76,111,255,.75),transparent);
}
.cta-band h2{font-size:clamp(21px,2vw,27px);line-height:1.35}
.cta-band p{margin-top:10px;font-size:14.5px;color:var(--text-2);line-height:1.8;max-width:640px}

/* ---------- 页脚 ---------- */
.footer{position:relative;background:#04080F;padding:64px 0 0;z-index:1}
.footer::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(47,224,208,.55),rgba(76,111,255,.45),transparent)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.25fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:11px;font-size:18px;font-weight:800;margin-bottom:16px}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:10px}
.footer-brand .brand-mark svg{width:18px;height:18px}
.footer-desc{font-size:14px;color:var(--text-2);line-height:1.85;max-width:380px}
.footer h4{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--text-1);letter-spacing:.04em}
.footer-links{display:flex;flex-direction:column;gap:11px}
.footer-links a{font-size:14px;color:var(--text-2);transition:color 180ms var(--ease),transform 180ms var(--ease);display:inline-block}
.footer-links a:hover{color:var(--primary);transform:translateX(2px)}
.footer-contact{display:flex;flex-direction:column;gap:12px;font-size:13.5px;color:var(--text-2);line-height:1.75}
.footer-contact strong{display:block;color:var(--text-1);font-weight:600;font-size:13.5px}
.footer-bottom{border-top:1px solid var(--line);padding:22px 0;text-align:center;font-size:12px;color:var(--text-3);line-height:1.8}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:26px;bottom:26px;z-index:50;width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;color:var(--text-1);cursor:pointer;
  background:rgba(12,26,44,.86);border:1px solid var(--line-strong);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity 240ms var(--ease),visibility 240ms var(--ease),transform 240ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{color:var(--primary);border-color:rgba(47,224,208,.55);box-shadow:0 0 22px rgba(47,224,208,.20)}
.to-top svg{width:18px;height:18px}

/* ---------- 断点 ---------- */
@media (max-width:1399px){
  .container{padding:0 40px}
}
@media (max-width:1200px){
  .card-grid{grid-template-columns:repeat(3,1fr);gap:18px}
  .link-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px) and (min-width:768px){
  :root{--sidebar-w:88px}
  .sidebar{padding:0 10px 16px;align-items:center}
  .sidebar-brand{height:76px;justify-content:center;padding:0}
  .brand-text{display:none}
  .nav-list{width:100%;align-items:center;gap:6px}
  .nav-item{width:48px;height:48px;justify-content:center;padding:0;border-radius:12px}
  .nav-item .nav-label{display:none}
  .nav-item.active::before{top:8px;bottom:8px;left:-2px}
  .sidebar-foot{width:100%;align-items:center;gap:8px;padding-top:10px}
  .sidebar-foot .btn{width:48px;height:48px;padding:0;border-radius:12px}
  .sidebar-foot .btn span{display:none}
  .sidebar-note{display:none}
  .container{padding:0 32px}
  .pagehead-grid{grid-template-columns:1fr;gap:32px}
  .pagehead-media{aspect-ratio:16/8}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .stat-cell:nth-child(3)::before,.stat-cell:nth-child(1)::before{display:none}
  .plan-row{grid-template-columns:52px 1fr;gap:14px 18px}
  .plan-row p{grid-column:2}
  .plan-row .text-link{grid-column:2;justify-self:start}
  .split{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
}
@media (max-width:767px){
  .main{margin-left:0;padding-top:64px}
  .container{padding:0 18px}
  .section{padding:56px 0}
  .section-head{margin-bottom:28px}
  .pagehead{padding:34px 0 40px}
  .pagehead-grid{grid-template-columns:1fr;gap:26px}
  .pagehead h1{font-size:clamp(28px,8vw,36px)}
  .pagehead .lead{font-size:14.5px}
  .pagehead .head-actions{gap:10px}
  .pagehead .head-actions .btn{width:100%}
  .pagehead-media{aspect-ratio:16/10}
  .card-grid{grid-template-columns:1fr}
  .chip-row{gap:8px;margin-bottom:26px}
  .chip{padding:7px 14px;font-size:13px}
  .stat-band{grid-template-columns:repeat(2,1fr)}
  .stat-cell{padding:24px 18px}
  .stat-cell:nth-child(1)::before,.stat-cell:nth-child(3)::before{display:none}
  .stat-label{font-size:12.5px}
  .plan-row{grid-template-columns:1fr;gap:10px;padding:22px 8px 22px 16px}
  .plan-no{font-size:20px}
  .plan-row .text-link{justify-self:start}
  .split{gap:26px}
  .split-media{aspect-ratio:16/10}
  .link-grid{grid-template-columns:1fr}
  .cta-band{padding:26px 22px;gap:20px}
  .cta-band .btn{width:100%}
  .footer{padding-top:48px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{font-size:11.5px;padding:18px 0}
  .to-top{right:16px;bottom:16px;width:42px;height:42px}
}

/* roulang page: category3 */
:root{
  --bg-0:#050A14;
  --bg-1:#081120;
  --bg-2:#0C1A2C;
  --line:rgba(122,190,255,.14);
  --line-strong:rgba(122,190,255,.28);
  --text-1:#EAF2FF;
  --text-2:#A8BAD2;
  --text-3:#6C82A0;
  --primary:#2FE0D0;
  --primary-deep:#0E8F8B;
  --accent:#4C6FFF;
  --warm:#FFB03A;
  --grad-primary:linear-gradient(135deg,#2FE0D0,#4C6FFF);
  --glass:rgba(140,200,255,.055);
  --radius-card:18px;
  --radius-btn:12px;
  --radius-input:12px;
  --radius-img:16px;
  --radius-pill:999px;
  --radius-faq:14px;
  --shadow-card:0 16px 40px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(47,224,208,.35),0 8px 30px rgba(47,224,208,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sidebar-w:248px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:32px;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg-0);
  color:var(--text-1);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
body.nav-open{overflow:hidden;}
h1,h2,h3,h4{margin:0;color:var(--text-1);}
p{margin:0;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px;}
[hidden]{display:none !important;}

/* ---------- 布局骨架 ---------- */
.shell{min-height:100vh;}
.main{
  margin-left:var(--sidebar-w);
  min-height:100vh;
  position:relative;
  isolation:isolate;
}
.main::before{
  content:"";
  position:fixed;
  top:0;right:0;bottom:0;
  left:var(--sidebar-w);
  pointer-events:none;
  z-index:-1;
  background-image:
    radial-gradient(760px 760px at 10% -6%,rgba(47,224,208,.13),transparent 62%),
    radial-gradient(860px 860px at 92% 6%,rgba(76,111,255,.14),transparent 64%),
    linear-gradient(rgba(122,190,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,190,255,.05) 1px,transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
  background-repeat:no-repeat,no-repeat,repeat,repeat;
  background-position:0 0,0 0,0 0,0 0;
}
.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 48px;
  position:relative;
}

/* ---------- 左侧竖向导航 ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  height:100vh;
  display:flex;
  flex-direction:column;
  background:linear-gradient(180deg,#070F1C 0%,#050A14 100%);
  z-index:80;
}
.sidebar::after{
  content:"";
  position:absolute;
  top:0;right:0;
  width:1px;height:100%;
  background:linear-gradient(180deg,rgba(122,190,255,0),rgba(122,190,255,.22) 22%,rgba(122,190,255,.22) 78%,rgba(122,190,255,0));
}
.brand{
  display:flex;
  align-items:center;
  gap:11px;
  height:88px;
  padding:0 20px;
  border-bottom:1px solid var(--line);
  flex:0 0 auto;
}
.brand-mark{
  width:36px;height:36px;
  flex:0 0 auto;
  display:grid;place-items:center;
  border-radius:var(--radius-btn);
  background:var(--glass);
  border:1px solid var(--line-strong);
  color:var(--primary);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.brand-mark svg{width:19px;height:19px;}
.brand-text strong{
  display:block;
  font-size:18px;
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.2px;
}
.brand-text small{
  display:block;
  font-size:11px;
  line-height:1.4;
  color:var(--text-3);
  letter-spacing:.5px;
}
.nav-list{
  flex:1 1 auto;
  display:flex;
  flex-direction:column;
  gap:3px;
  padding:18px 12px;
  overflow-y:auto;
}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:11px;
  height:44px;
  padding:0 12px 0 22px;
  border-radius:var(--radius-btn);
  color:var(--text-2);
  font-size:15px;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item svg{
  width:18px;height:18px;
  flex:0 0 auto;
  opacity:.82;
  transition:opacity .18s var(--ease);
}
.nav-item:hover{background:var(--glass);color:var(--primary);}
.nav-item:hover svg{opacity:1;}
.nav-item.active{
  background:rgba(47,224,208,.08);
  color:var(--text-1);
  font-weight:600;
}
.nav-item.active::before{
  content:"";
  position:absolute;
  left:8px;top:10px;bottom:10px;
  width:3px;
  border-radius:var(--radius-pill);
  background:var(--primary);
  box-shadow:0 0 12px rgba(47,224,208,.75);
}
.nav-item.active svg{opacity:1;color:var(--primary);}
.sidebar-foot{
  flex:0 0 auto;
  padding:16px;
  border-top:1px solid var(--line);
  display:flex;
  flex-direction:column;
  gap:10px;
}
.sidebar-foot .btn{width:100%;height:44px;font-size:14px;}
.sidebar-note{
  font-size:11px;
  line-height:1.6;
  color:var(--text-3);
  text-align:center;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{
  background:var(--grad-primary);
  color:#04121A;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{
  filter:brightness(1.08);
  transform:translateY(-2px);
  box-shadow:0 0 0 1px rgba(47,224,208,.6),0 12px 36px rgba(47,224,208,.34);
}
.btn-primary:active{
  transform:translateY(0);
  box-shadow:0 0 0 1px rgba(47,224,208,.45),0 4px 14px rgba(47,224,208,.2);
}
.btn-ghost{
  background:var(--glass);
  border-color:var(--line-strong);
  color:var(--text-1);
  backdrop-filter:blur(14px) saturate(140%);
}
.btn-ghost:hover{
  border-color:rgba(47,224,208,.5);
  color:var(--primary);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(0);}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;}

/* ---------- 面包屑 ---------- */
.crumbs-wrap{padding-top:28px;}
.crumbs{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
}
.crumbs a{color:var(--text-3);transition:color .18s var(--ease);}
.crumbs a:hover{color:var(--primary);}
.crumbs .sep{color:var(--text-3);opacity:.6;}
.crumbs .current{color:var(--text-2);}

/* ---------- 页头 ---------- */
.page-head{
  display:grid;
  grid-template-columns:1.12fr .88fr;
  gap:48px;
  align-items:center;
  padding:40px 0 56px;
  min-height:280px;
  border-bottom:1px solid var(--line);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.14em;
  color:var(--primary);
  background:rgba(47,224,208,.08);
  border:1px solid rgba(47,224,208,.32);
  border-radius:var(--radius-pill);
  padding:5px 14px;
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 10px rgba(47,224,208,.9);
}
.page-head h1{
  font-size:clamp(30px,3.6vw,46px);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.5px;
  margin-bottom:16px;
}
.page-head h1 em{
  font-style:normal;
  background:linear-gradient(120deg,#2FE0D0,#7FA8FF 70%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.page-head .lede{
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
  max-width:560px;
}
.page-head-media{
  position:relative;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line-strong);
  aspect-ratio:16/10;
  box-shadow:var(--shadow-card);
}
.page-head-media::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:inherit;
  padding:1px;
  background:linear-gradient(135deg,rgba(47,224,208,.65),rgba(76,111,255,.2) 45%,transparent 80%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  pointer-events:none;
  z-index:2;
}
.page-head-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.page-head-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(5,10,20,0) 42%,rgba(5,10,20,.78) 100%);
}
.page-head-media:hover img{transform:scale(1.03);}

/* ---------- 分类主体 + 侧栏目录 ---------- */
.cat-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 268px;
  gap:56px;
  align-items:start;
  padding:56px 0 0;
}
.cat-main{min-width:0;}
.cat-aside{
  position:sticky;
  top:40px;
  align-self:start;
  display:flex;
  flex-direction:column;
  gap:16px;
}
.toc{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:18px;
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.toc-title{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:12px;
}
.toc a{
  display:block;
  font-size:14px;
  color:var(--text-2);
  padding:8px 12px;
  border-radius:var(--radius-btn);
  border-left:2px solid transparent;
  transition:color .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.toc a:hover{
  color:var(--primary);
  background:rgba(47,224,208,.06);
  border-left-color:var(--primary);
  transform:translateX(2px);
}
.toc-cta{
  font-size:12px;
  color:var(--text-3);
  line-height:1.7;
  padding:14px 16px;
  border-radius:var(--radius-card);
  border:1px dashed var(--line-strong);
}
.toc-cta strong{color:var(--text-1);display:block;font-size:13px;margin-bottom:4px;}

/* ---------- 板块 ---------- */
.section{padding:64px 0;scroll-margin-top:32px;}
.section + .section{border-top:1px solid var(--line);}
.section-head{max-width:740px;margin-bottom:8px;}
.section-head h2{
  font-size:clamp(24px,2.4vw,34px);
  font-weight:700;
  line-height:1.26;
  letter-spacing:-.3px;
  margin-bottom:10px;
}
.section-sub{
  font-size:14px;
  line-height:1.8;
  color:var(--text-2);
}

/* ---------- 时间轴 ---------- */
.timeline{
  position:relative;
  margin-top:36px;
  padding-left:36px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:5px;top:10px;bottom:10px;
  width:1px;
  background:linear-gradient(180deg,rgba(47,224,208,.8),rgba(76,111,255,.4) 55%,rgba(122,190,255,0));
}
.timeline-item{
  position:relative;
  padding-bottom:36px;
}
.timeline-item:last-child{padding-bottom:0;}
.timeline-dot{
  position:absolute;
  left:-36px;
  top:8px;
  width:11px;height:11px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 0 3px rgba(47,224,208,.16),0 0 18px rgba(47,224,208,.8);
}
.timeline-step{
  display:block;
  font-size:13px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--warm);
  font-variant-numeric:tabular-nums;
  margin-bottom:2px;
}
.timeline-item h3{
  font-size:20px;
  font-weight:600;
  line-height:1.4;
  margin-bottom:8px;
}
.timeline-item p{
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
  max-width:640px;
  margin-bottom:12px;
}
.timeline-meta{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12.5px;
  color:var(--text-3);
  background:rgba(140,200,255,.05);
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  padding:5px 14px;
}
.timeline-meta b{color:var(--primary);font-weight:600;}

/* ---------- 数据条 ---------- */
.stats{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  margin-top:32px;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
}
.stat{
  position:relative;
  padding:28px 22px;
  border-left:1px solid var(--line);
}
.stat:first-child{border-left:0;}
.stat-num{
  display:block;
  font-size:clamp(34px,3.6vw,50px);
  font-weight:700;
  line-height:1;
  letter-spacing:-1.5px;
  font-variant-numeric:tabular-nums;
  color:var(--primary);
  text-shadow:0 0 30px rgba(47,224,208,.35);
}
.stat.warm .stat-num{
  color:var(--warm);
  text-shadow:0 0 30px rgba(255,176,58,.3);
}
.stat-label{
  display:block;
  margin-top:12px;
  font-size:13px;
  line-height:1.6;
  color:var(--text-2);
}
.stats-note{
  margin-top:14px;
  font-size:12.5px;
  color:var(--text-3);
}

/* ---------- 图文分栏 ---------- */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
  margin-top:36px;
}
.split + .split{margin-top:48px;}
.split.reverse .split-media{order:2;}
.split-body h3{
  font-size:21px;
  font-weight:600;
  line-height:1.4;
  margin-bottom:10px;
}
.split-body > p{
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
  margin-bottom:16px;
}
.split-media{
  position:relative;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line-strong);
  aspect-ratio:16/11;
  box-shadow:var(--shadow-card);
}
.split-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.split-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(5,10,20,0) 55%,rgba(5,10,20,.6) 100%);
  transition:background .3s var(--ease);
}
.split-media:hover img{transform:scale(1.03);}
.split-media:hover::after{background:linear-gradient(180deg,rgba(5,10,20,.08) 45%,rgba(5,10,20,.72) 100%);}

.feature-list{
  display:flex;
  flex-direction:column;
}
.feature-list li{
  position:relative;
  padding:11px 0 11px 24px;
  font-size:14.5px;
  line-height:1.75;
  color:var(--text-2);
  border-bottom:1px solid var(--line);
}
.feature-list li:last-child{border-bottom:0;}
.feature-list li::before{
  content:"";
  position:absolute;
  left:0;top:20px;
  width:7px;height:7px;
  border-radius:50%;
  background:var(--grad-primary);
  box-shadow:0 0 10px rgba(47,224,208,.6);
}

/* ---------- 场景卡片 ---------- */
.scene-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  margin-top:34px;
}
.card{
  position:relative;
  display:flex;
  flex-direction:column;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  backdrop-filter:blur(14px) saturate(140%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:0 20px 44px rgba(0,0,0,.5),0 0 0 1px rgba(47,224,208,.18),0 10px 34px rgba(47,224,208,.14);
}
.card-media{
  aspect-ratio:16/9;
  overflow:hidden;
  position:relative;
  border-bottom:1px solid var(--line);
}
.card-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.card:hover .card-media img{transform:scale(1.03);}
.card-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(5,10,20,0) 50%,rgba(5,10,20,.7) 100%);
}
.card-body{padding:20px 22px 24px;}
.card-body h3{
  font-size:18px;
  font-weight:600;
  line-height:1.45;
  margin-bottom:8px;
}
.card-body p{
  font-size:14px;
  line-height:1.8;
  color:var(--text-2);
}
.badge{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  line-height:1;
  padding:6px 12px;
  border-radius:var(--radius-pill);
  color:var(--primary);
  background:rgba(47,224,208,.12);
  border:1px solid rgba(47,224,208,.3);
  margin-bottom:12px;
}

/* ---------- FAQ ---------- */
.faq{
  display:flex;
  flex-direction:column;
  gap:12px;
  max-width:860px;
  margin-top:32px;
}
.faq-item{
  position:relative;
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-faq);
  overflow:hidden;
  backdrop-filter:blur(14px) saturate(140%);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item[open]{
  border-color:rgba(47,224,208,.4);
  box-shadow:0 12px 34px rgba(0,0,0,.4),0 0 0 1px rgba(47,224,208,.12);
}
.faq-item[open]::before{
  content:"";
  position:absolute;
  left:0;top:14px;bottom:14px;
  width:2px;
  border-radius:var(--radius-pill);
  background:var(--primary);
  box-shadow:0 0 12px rgba(47,224,208,.8);
}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 20px;
  font-size:17px;
  font-weight:600;
  color:var(--text-1);
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  flex:0 0 auto;
  font-size:22px;
  line-height:1;
  font-weight:400;
  color:var(--primary);
  transition:transform .2s var(--ease);
}
.faq-item[open] summary::after{content:"−";}
.faq-item summary:hover{color:var(--primary);}
.faq-answer{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
  margin:64px 0 0;
  padding:32px 36px;
  border-radius:var(--radius-card);
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(47,224,208,.1),rgba(76,111,255,.1));
  backdrop-filter:blur(14px) saturate(140%);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,rgba(47,224,208,0),rgba(47,224,208,.8),rgba(76,111,255,.8),rgba(47,224,208,0));
}
.cta-band h2{
  font-size:clamp(20px,2vw,26px);
  font-weight:700;
  line-height:1.35;
  margin-bottom:6px;
}
.cta-band p{
  font-size:14px;
  color:var(--text-2);
  line-height:1.75;
}
.cta-band .btn{flex:0 0 auto;}

/* ---------- 内链区块 ---------- */
.link-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:16px;
  margin-top:30px;
}
.link-card{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 20px;
  border-radius:var(--radius-card);
  background:var(--glass);
  border:1px solid var(--line);
  transition:transform .22s var(--ease),border-color .22s var(--ease),background .22s var(--ease);
}
.link-card:hover{
  transform:translateY(-3px);
  border-color:rgba(47,224,208,.45);
  background:rgba(47,224,208,.06);
}
.link-card strong{
  display:block;
  font-size:16px;
  font-weight:600;
  margin-bottom:2px;
  transition:color .18s var(--ease);
}
.link-card:hover strong{color:var(--primary);}
.link-card span{
  font-size:13px;
  color:var(--text-3);
  line-height:1.6;
}
.link-card .arrow{
  flex:0 0 auto;
  color:var(--primary);
  font-size:16px;
  transition:transform .22s var(--ease);
}
.link-card:hover .arrow{transform:translateX(4px);}

/* ---------- 页脚 ---------- */
.footer{
  position:relative;
  margin-top:96px;
  background:#04080F;
  border-top:1px solid var(--line);
}
.footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,rgba(47,224,208,0),rgba(47,224,208,.55),rgba(76,111,255,.55),rgba(47,224,208,0));
}
.footer .container{padding-top:56px;padding-bottom:26px;}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:40px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:800;
  letter-spacing:-.2px;
  margin-bottom:14px;
}
.footer-brand .brand-mark{width:32px;height:32px;}
.footer-desc{
  font-size:13.5px;
  line-height:1.85;
  color:var(--text-2);
  max-width:340px;
}
.footer h4{
  font-size:13px;
  letter-spacing:.1em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:16px;
}
.footer-links{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.footer-links a{
  font-size:14px;
  color:var(--text-2);
  transition:color .18s var(--ease),transform .18s var(--ease);
  width:fit-content;
}
.footer-links a:hover{color:var(--primary);transform:translateX(2px);}
.footer-contact{
  display:flex;
  flex-direction:column;
  gap:12px;
  font-size:13px;
  line-height:1.75;
  color:var(--text-2);
}
.footer-contact strong{
  display:block;
  color:var(--text-1);
  font-size:13px;
  font-weight:600;
}
.footer-bottom{
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid var(--line);
  text-align:center;
  font-size:12px;
  line-height:1.8;
  color:var(--text-3);
}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;
  right:28px;bottom:28px;
  width:46px;height:46px;
  display:grid;
  place-items:center;
  border-radius:50%;
  border:1px solid var(--line-strong);
  background:rgba(12,26,44,.85);
  backdrop-filter:blur(14px);
  color:var(--primary);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,border-color .2s var(--ease);
  z-index:70;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{border-color:rgba(47,224,208,.6);box-shadow:0 0 0 1px rgba(47,224,208,.3),0 8px 26px rgba(47,224,208,.22);}
.to-top svg{width:18px;height:18px;}

/* ---------- 顶部导航（移动端） ---------- */
.topbar{display:none;}
.nav-toggle{
  width:42px;height:42px;
  display:grid;
  place-items:center;
  border-radius:var(--radius-btn);
  border:1px solid var(--line-strong);
  background:var(--glass);
  color:var(--text-1);
  cursor:pointer;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:rgba(47,224,208,.5);color:var(--primary);}
.nav-toggle svg{width:20px;height:20px;}

/* ---------- 断点：平板 ---------- */
@media (min-width:768px) and (max-width:1023px){
  :root{--sidebar-w:88px;}
  .brand{justify-content:center;padding:0;height:88px;}
  .brand-text{display:none;}
  .nav-list{padding:16px 10px;align-items:center;}
  .nav-item{
    width:56px;
    height:52px;
    padding:0;
    justify-content:center;
  }
  .nav-item .nav-label{display:none;}
  .nav-item.active::before{left:-4px;}
  .sidebar-foot{padding:12px 10px;align-items:center;}
  .sidebar-foot .btn{width:48px;padding:0;font-size:0;gap:0;}
  .sidebar-foot .btn::after{
    content:"";
    width:16px;height:16px;
    border-radius:50%;
    background:currentColor;
    opacity:.85;
  }
  .sidebar-note{display:none;}
  .container{padding:0 36px;}
  .page-head{grid-template-columns:1fr .8fr;gap:32px;}
  .cat-layout{grid-template-columns:1fr;gap:32px;}
  .cat-aside{position:static;order:-1;}
  .toc{
    display:flex;
    align-items:center;
    gap:8px;
    overflow-x:auto;
    padding:12px;
    scrollbar-width:thin;
  }
  .toc-title{display:none;}
  .toc a{
    flex:0 0 auto;
    white-space:nowrap;
    border-left:0;
    border:1px solid var(--line);
    border-radius:var(--radius-pill);
    padding:7px 14px;
    font-size:13px;
  }
  .toc a:hover{border-color:rgba(47,224,208,.5);transform:none;}
  .toc-cta{display:none;}
  .scene-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .stats{grid-template-columns:repeat(2,1fr);}
  .stat:nth-child(3){border-left:0;border-top:1px solid var(--line);}
  .stat:nth-child(4){border-top:1px solid var(--line);}
}

/* ---------- 断点：移动端 ---------- */
@media (max-width:767px){
  .main{margin-left:0;padding-top:64px;}
  .main::before{left:0;}
  .topbar{
    display:flex;
    position:fixed;
    top:0;left:0;right:0;
    height:64px;
    align-items:center;
    justify-content:space-between;
    padding:0 18px;
    background:rgba(5,10,20,.92);
    backdrop-filter:blur(16px) saturate(140%);
    border-bottom:1px solid var(--line);
    z-index:100;
  }
  .topbar .brand{height:auto;padding:0;border:0;background:none;}
  .topbar .brand-text strong{font-size:16px;}
  .topbar .brand-text small{font-size:10px;}
  .sidebar{
    width:100%;
    transform:translateX(-100%);
    transition:transform .26s var(--ease);
    z-index:110;
    background:rgba(5,10,20,.97);
    backdrop-filter:blur(18px);
  }
  .sidebar.open{transform:translateX(0);}
  .brand{padding:0 20px;height:72px;}
  .nav-list{padding:20px 16px;gap:4px;}
  .nav-item{
    height:auto;
    padding:16px 16px 16px 22px;
    font-size:20px;
    border-radius:var(--radius-btn);
  }
  .nav-item svg{width:22px;height:22px;}
  .sidebar-foot{padding:16px 18px 26px;}
  .sidebar-foot .btn{height:48px;width:100%;font-size:15px;}
  .sidebar-note{display:block;font-size:11px;}
  .container{padding:0 20px;}
  .crumbs-wrap{padding-top:20px;}
  .page-head{
    grid-template-columns:1fr;
    gap:26px;
    padding:26px 0 40px;
    min-height:200px;
  }
  .page-head-media{aspect-ratio:16/9;}
  .page-head h1{font-size:clamp(26px,7vw,32px);}
  .cat-layout{padding-top:32px;gap:26px;}
  .section{padding:44px 0;}
  .timeline{padding-left:30px;}
  .timeline-dot{left:-30px;}
  .timeline-item{padding-bottom:30px;}
  .timeline-item h3{font-size:18px;}
  .split,
  .split.reverse{grid-template-columns:1fr;gap:24px;margin-top:28px;}
  .split.reverse .split-media{order:0;}
  .scene-grid,
  .link-grid{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr;}
  .stat{border-left:0;border-top:1px solid var(--line);padding:22px 20px;}
  .stat:first-child{border-top:0;}
  .cta-band{padding:26px 22px;gap:20px;margin-top:44px;}
  .cta-band .btn{width:100%;}
  .footer{margin-top:64px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{margin-top:32px;}
  .to-top{right:16px;bottom:16px;width:42px;height:42px;}
  .faq-item summary{font-size:16px;padding:16px;}
  .faq-answer{padding:0 16px 16px;}
}

/* ---------- 断点：大屏 ---------- */
@media (min-width:1400px){
  .container{max-width:1320px;}
}

/* roulang page: category4 */
:root{
  --bg-0:#050A14;
  --bg-1:#081120;
  --bg-2:#0C1A2C;
  --line:rgba(122,190,255,.14);
  --line-strong:rgba(122,190,255,.28);
  --text-1:#EAF2FF;
  --text-2:#A8BAD2;
  --text-3:#6C82A0;
  --primary:#2FE0D0;
  --primary-deep:#0E8F8B;
  --accent:#4C6FFF;
  --warm:#FFB03A;
  --grad-primary:linear-gradient(135deg,#2FE0D0,#4C6FFF);
  --glass:rgba(140,200,255,.055);
  --r-card:18px;
  --r-btn:12px;
  --r-input:12px;
  --r-img:16px;
  --r-badge:999px;
  --r-faq:14px;
  --shadow-card:0 16px 40px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px rgba(47,224,208,.35),0 8px 30px rgba(47,224,208,.22);
  --sidebar-w:248px;
  --font-cn:"PingFang SC","HarmonyOS Sans","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;
  --font-num:"Barlow Semi Condensed","Oswald","PingFang SC",system-ui,sans-serif;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,
*::before,
*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.2px;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(760px 760px at 6% -6%,rgba(47,224,208,.12),transparent 66%),
    radial-gradient(840px 840px at 94% 10%,rgba(76,111,255,.13),transparent 68%),
    linear-gradient(rgba(122,190,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(122,190,255,.05) 1px,transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(1.6px 1.6px at 18% 26%,rgba(234,242,255,.22),transparent 60%),
    radial-gradient(1.4px 1.4px at 68% 14%,rgba(234,242,255,.18),transparent 60%),
    radial-gradient(1.8px 1.8px at 42% 62%,rgba(234,242,255,.14),transparent 60%),
    radial-gradient(1.3px 1.3px at 86% 74%,rgba(234,242,255,.17),transparent 60%),
    radial-gradient(1.5px 1.5px at 12% 84%,rgba(234,242,255,.13),transparent 60%);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.2px;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px;}

/* ============ 左侧竖向导航 ============ */
.sidebar{
  position:fixed;
  left:0;
  top:0;
  z-index:40;
  width:var(--sidebar-w);
  height:100vh;
  display:flex;
  flex-direction:column;
  background:linear-gradient(180deg,rgba(8,17,32,.94),rgba(5,10,20,.97));
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
}
.sidebar::after{
  content:"";
  position:absolute;
  right:0;
  top:0;
  width:1px;
  height:100%;
  background:linear-gradient(180deg,transparent,rgba(122,190,255,.28) 30%,rgba(122,190,255,.28) 70%,transparent);
}
.sidebar-brand{
  height:88px;
  flex:0 0 88px;
  display:flex;
  align-items:center;
  gap:12px;
  padding:0 20px;
  border-bottom:1px solid var(--line);
}
.brand-mark{
  width:36px;
  height:36px;
  flex:0 0 36px;
  display:grid;
  place-items:center;
  border-radius:12px;
  background:linear-gradient(140deg,rgba(47,224,208,.22),rgba(76,111,255,.22));
  border:1px solid var(--line-strong);
  color:var(--primary);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08);
}
.brand-mark svg{width:19px;height:19px;}
.brand-text{display:flex;flex-direction:column;min-width:0;}
.brand-name{font-size:18px;font-weight:800;line-height:1.2;letter-spacing:.2px;white-space:nowrap;}
.brand-sub{font-size:11px;color:var(--text-3);line-height:1.6;letter-spacing:.4px;}
.sidebar-close{
  display:none;
  margin-left:auto;
  width:36px;
  height:36px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--glass);
  color:var(--text-1);
  cursor:pointer;
  align-items:center;
  justify-content:center;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.sidebar-close:hover{border-color:var(--line-strong);color:var(--primary);}
.sidebar-close svg{width:17px;height:17px;}
.nav-list{
  flex:1 1 auto;
  overflow-y:auto;
  padding:18px 0;
  display:flex;
  flex-direction:column;
  gap:2px;
}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  height:44px;
  padding:0 16px 0 20px;
  font-size:15px;
  color:var(--text-2);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.nav-item svg{width:19px;height:19px;flex:0 0 19px;opacity:.86;}
.nav-item::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  transform:translateY(-50%) scaleY(.3);
  width:3px;
  height:22px;
  border-radius:2px;
  background:var(--primary);
  opacity:0;
  box-shadow:0 0 12px rgba(47,224,208,.75);
  transition:opacity .18s var(--ease),transform .18s var(--ease);
}
.nav-item:hover{background:rgba(140,200,255,.06);color:var(--primary);}
.nav-item.active{
  background:var(--glass);
  color:var(--text-1);
  font-weight:600;
}
.nav-item.active::before{opacity:1;transform:translateY(-50%) scaleY(1);}
.nav-label{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.sidebar-foot{
  flex:0 0 auto;
  padding:16px 16px 20px;
  border-top:1px solid var(--line);
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  letter-spacing:.3px;
  cursor:pointer;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),filter .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),background .2s var(--ease);
}
.btn svg{width:17px;height:17px;}
.btn-primary{
  background:var(--grad-primary);
  color:#04222A;
  box-shadow:0 8px 24px rgba(47,224,208,.22);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.07);box-shadow:0 12px 34px rgba(47,224,208,.34);}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 14px rgba(47,224,208,.2);}
.btn-ghost{
  background:var(--glass);
  border-color:var(--line-strong);
  color:var(--text-1);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.btn-ghost:hover{color:var(--primary);border-color:rgba(47,224,208,.45);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-block{width:100%;}
.sidebar-foot .btn{height:44px;font-size:14px;}
.foot-text{
  margin-top:12px;
  font-size:11.5px;
  line-height:1.7;
  color:var(--text-3);
  text-align:center;
}
.foot-text strong{color:var(--text-2);font-weight:600;}

/* ============ 移动端顶栏与抽屉 ============ */
.topbar{
  display:none;
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:50;
  height:64px;
  align-items:center;
  justify-content:space-between;
  padding:0 18px;
  background:rgba(5,10,20,.9);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.topbar .brand-name{font-size:16px;}
.menu-btn{
  width:42px;
  height:42px;
  border-radius:12px;
  border:1px solid var(--line-strong);
  background:var(--glass);
  color:var(--text-1);
  display:grid;
  place-items:center;
  cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.menu-btn:hover{color:var(--primary);border-color:rgba(47,224,208,.45);}
.menu-btn svg{width:20px;height:20px;}
.nav-mask{
  display:none;
  position:fixed;
  inset:0;
  z-index:55;
  background:rgba(3,7,14,.6);
  backdrop-filter:blur(2px);
}

/* ============ 内容区 ============ */
.shell{
  position:relative;
  z-index:1;
  margin-left:var(--sidebar-w);
  min-height:100vh;
}
.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 48px;
}

/* ============ 页头 ============ */
.page-head{
  position:relative;
  overflow:hidden;
  padding:44px 0 56px;
  border-bottom:1px solid var(--line);
}
.page-head::before{
  content:"";
  position:absolute;
  left:-180px;
  top:-220px;
  width:680px;
  height:680px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(47,224,208,.14),transparent 66%);
  pointer-events:none;
}
.page-head::after{
  content:"";
  position:absolute;
  right:-160px;
  bottom:-260px;
  width:720px;
  height:720px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(76,111,255,.16),transparent 68%);
  pointer-events:none;
}
.breadcrumb{
  position:relative;
  z-index:1;
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:26px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--text-2);transition:color .18s var(--ease);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .current{color:var(--text-3);}
.page-head-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:1.3fr .7fr;
  gap:44px;
  align-items:center;
  min-height:220px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:var(--r-badge);
  font-size:12.5px;
  letter-spacing:.6px;
  color:var(--primary);
  background:rgba(47,224,208,.1);
  border:1px solid rgba(47,224,208,.3);
  margin-bottom:18px;
}
.eyebrow::before{
  content:"";
  width:5px;
  height:5px;
  border-radius:50%;
  background:var(--primary);
  box-shadow:0 0 8px rgba(47,224,208,.9);
}
.page-head h1{
  font-size:clamp(30px,3.6vw,48px);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.5px;
  margin-bottom:16px;
  max-width:760px;
}
.page-head-sub{
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
  max-width:600px;
  margin-bottom:26px;
}
.page-head-actions{display:flex;gap:14px;flex-wrap:wrap;}
.page-head-figure{
  position:relative;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.07);
  aspect-ratio:16/11;
}
.page-head-figure img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s var(--ease);
}
.page-head-figure::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(5,10,20,.05) 0%,rgba(5,10,20,.55) 100%);
  pointer-events:none;
}
.page-head-figure:hover img{transform:scale(1.03);}

/* ============ 板块通用 ============ */
.section{
  position:relative;
  padding:92px 0;
}
.section--tight{padding:72px 0;}
.section--alt{
  background:linear-gradient(180deg,rgba(8,17,32,.72),rgba(5,10,20,.2));
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.section-head{
  max-width:760px;
  margin-bottom:48px;
}
.section-head h2{
  font-size:clamp(24px,2.4vw,36px);
  font-weight:700;
  letter-spacing:-.4px;
  margin-bottom:12px;
}
.section-head .lead{
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.85;
  max-width:660px;
}
.section-head-row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--primary);
  transition:gap .2s var(--ease),color .2s var(--ease);
}
.text-link:hover{gap:10px;color:#7DF3E8;}

/* ============ 分栏图文 ============ */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.split + .split{margin-top:84px;}
.split-media{
  position:relative;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  aspect-ratio:4/3;
}
.split-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .32s var(--ease);
}
.split-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(5,10,20,.02),rgba(5,10,20,.42));
  pointer-events:none;
}
.split-media:hover img{transform:scale(1.03);}
.split.reverse .split-media{order:2;}
.split-body h2{
  font-size:clamp(23px,2.1vw,31px);
  font-weight:700;
  margin-bottom:16px;
  letter-spacing:-.4px;
}
.split-body h2::before{
  content:"";
  display:block;
  width:44px;
  height:3px;
  border-radius:2px;
  background:var(--grad-primary);
  margin-bottom:18px;
  box-shadow:0 0 12px rgba(47,224,208,.5);
}
.split-body p{
  font-size:15.5px;
  line-height:1.95;
  color:var(--text-2);
  margin-bottom:16px;
}
.tick-list{display:flex;flex-direction:column;gap:12px;margin-top:22px;}
.tick-list li{
  position:relative;
  padding-left:26px;
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.8;
}
.tick-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:9px;
  width:11px;
  height:11px;
  border-radius:3px;
  border:1px solid rgba(47,224,208,.6);
  background:rgba(47,224,208,.16);
  box-shadow:0 0 10px rgba(47,224,208,.35);
}
.tick-list li strong{color:var(--text-1);font-weight:600;}

/* ============ 编号大卡 ============ */
.num-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  padding-bottom:32px;
}
.num-card{
  display:flex;
  gap:22px;
  align-items:flex-start;
  padding:28px 28px 26px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.num-card:nth-child(even){transform:translateY(32px);}
.num-card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-card),0 0 24px rgba(47,224,208,.12);
}
.num-card:nth-child(even):hover{transform:translateY(28px);}
.num-index{
  font-family:var(--font-num);
  font-size:44px;
  font-weight:700;
  line-height:1;
  font-variant-numeric:tabular-nums;
  letter-spacing:-1px;
  color:var(--primary);
  text-shadow:0 0 22px rgba(47,224,208,.4);
}
.num-card:nth-child(2n) .num-index{
  color:var(--warm);
  text-shadow:0 0 22px rgba(255,176,58,.32);
}
.num-body h3{font-size:20px;font-weight:600;margin-bottom:8px;}
.num-body p{font-size:14.5px;color:var(--text-2);line-height:1.85;}

/* ============ 数据带 ============ */
.stats-band{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06),var(--shadow-card);
  overflow:hidden;
}
.stat{
  padding:34px 28px;
  border-left:1px solid var(--line);
}
.stat:first-child{border-left:none;}
.stat-num{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:clamp(40px,4vw,58px);
  font-weight:700;
  line-height:1;
  letter-spacing:-1.5px;
  color:var(--primary);
  text-shadow:0 0 26px rgba(47,224,208,.35);
  display:flex;
  align-items:baseline;
  gap:4px;
}
.stat:nth-child(2n) .stat-num{color:var(--warm);text-shadow:0 0 26px rgba(255,176,58,.3);}
.stat-num small{font-size:15px;font-weight:600;color:var(--text-2);letter-spacing:0;}
.stat-label{margin-top:10px;font-size:13px;color:var(--text-3);line-height:1.7;}

/* ============ 行式流程 ============ */
.flow-list{border-top:1px solid var(--line);}
.flow-row{
  position:relative;
  display:grid;
  grid-template-columns:70px 250px 1fr;
  gap:24px;
  align-items:center;
  padding:26px 20px 26px 0;
  border-bottom:1px solid var(--line);
  transition:transform .22s var(--ease),background .22s var(--ease);
}
.flow-row::before{
  content:"";
  position:absolute;
  left:-16px;
  top:50%;
  transform:translateY(-50%) scaleY(.2);
  width:3px;
  height:36px;
  border-radius:2px;
  background:var(--primary);
  opacity:0;
  box-shadow:0 0 14px rgba(47,224,208,.75);
  transition:opacity .22s var(--ease),transform .22s var(--ease);
}
.flow-row:hover{transform:translateX(6px);background:rgba(140,200,255,.045);}
.flow-row:hover::before{opacity:1;transform:translateY(-50%) scaleY(1);}
.flow-idx{
  font-family:var(--font-num);
  font-variant-numeric:tabular-nums;
  font-size:26px;
  font-weight:700;
  color:var(--text-3);
  letter-spacing:0;
}
.flow-row:hover .flow-idx{color:var(--primary);}
.flow-name{font-size:18px;font-weight:600;color:var(--text-1);}
.flow-desc{font-size:14.5px;color:var(--text-2);line-height:1.85;}

/* ============ 卡片网格 ============ */
.card-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.card{
  display:flex;
  flex-direction:column;
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  box-shadow:var(--shadow-card),0 0 22px rgba(47,224,208,.1);
}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--bg-2);
}
.card-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .3s var(--ease);
}
.card-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(5,10,20,0) 40%,rgba(5,10,20,.62) 100%);
  pointer-events:none;
}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:19px;font-weight:600;line-height:1.45;}
.card-body p{font-size:14px;color:var(--text-2);line-height:1.85;}
.card-meta{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12.5px;
  color:var(--text-3);
  padding-top:12px;
  border-top:1px solid var(--line);
  margin-top:auto;
}
.badge{
  display:inline-flex;
  align-items:center;
  padding:3px 11px;
  border-radius:var(--r-badge);
  font-size:12px;
  color:var(--primary);
  background:rgba(47,224,208,.12);
  border:1px solid rgba(47,224,208,.3);
  line-height:1.7;
}
.badge--warm{
  color:var(--warm);
  background:rgba(255,176,58,.1);
  border-color:rgba(255,176,58,.32);
}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;}
.faq-item{
  border-radius:var(--r-faq);
  background:var(--glass);
  border:1px solid var(--line);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  margin-bottom:14px;
  overflow:hidden;
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.faq-item[open]{
  border-color:rgba(47,224,208,.4);
  box-shadow:inset 2px 0 0 var(--primary),0 10px 26px rgba(0,0,0,.35);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:20px;
  font-size:17px;
  font-weight:600;
  cursor:pointer;
  list-style:none;
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--primary);}
.faq-icon{
  position:relative;
  width:20px;
  height:20px;
  flex:0 0 20px;
  border-radius:50%;
  border:1px solid var(--line-strong);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  background:var(--primary);
  transform:translate(-50%,-50%);
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.faq-icon::before{width:9px;height:1.5px;}
.faq-icon::after{width:1.5px;height:9px;}
.faq-item[open] .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0;}
.faq-answer{
  padding:0 20px 20px;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}

/* ============ CTA 玻璃带 ============ */
.cta-band{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
  padding:40px 44px;
  border-radius:var(--r-card);
  background:linear-gradient(120deg,rgba(47,224,208,.1),rgba(76,111,255,.1));
  border:1px solid var(--line-strong);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08),var(--shadow-card);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:1px;
  background:var(--grad-primary);
  opacity:.85;
}
.cta-band h2{font-size:clamp(22px,2.1vw,30px);font-weight:700;margin-bottom:10px;}
.cta-band p{font-size:14.5px;color:var(--text-2);max-width:560px;line-height:1.85;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ============ 内链区块 ============ */
.crosslinks{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:18px;
}
.crosslink{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:20px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:rgba(12,26,44,.55);
  transition:transform .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.crosslink:hover{
  transform:translateY(-4px);
  border-color:var(--line-strong);
  background:rgba(12,26,44,.85);
}
.crosslink strong{font-size:15.5px;font-weight:600;color:var(--text-1);}
.crosslink span{font-size:12.5px;color:var(--text-3);line-height:1.7;}
.crosslink em{
  font-style:normal;
  font-size:12.5px;
  color:var(--primary);
  margin-top:4px;
}

/* ============ 页脚 ============ */
.footer{
  position:relative;
  z-index:1;
  background:#04080F;
  border-top:1px solid var(--line);
  padding:64px 0 26px;
}
.footer::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,224,208,.5),rgba(76,111,255,.45),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  font-weight:800;
  margin-bottom:14px;
}
.footer-brand .brand-mark{width:32px;height:32px;flex:0 0 32px;}
.footer-desc{font-size:13.5px;line-height:1.9;color:var(--text-3);max-width:340px;}
.footer h4{
  font-size:13px;
  font-weight:600;
  letter-spacing:1px;
  color:var(--text-1);
  margin-bottom:18px;
}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{
  font-size:14px;
  color:var(--text-2);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-links a:hover{color:var(--primary);transform:translateX(-2px);}
.footer-contact{display:flex;flex-direction:column;gap:14px;font-size:13.5px;color:var(--text-3);line-height:1.8;}
.footer-contact strong{display:block;color:var(--text-2);font-weight:600;font-size:13px;margin-bottom:2px;}
.footer-bottom{
  padding-top:22px;
  border-top:1px solid var(--line);
  font-size:12px;
  color:var(--text-3);
  text-align:center;
  line-height:1.9;
}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:45;
  width:46px;
  height:46px;
  display:grid;
  place-items:center;
  border-radius:50%;
  border:1px solid var(--line-strong);
  background:rgba(12,26,44,.9);
  backdrop-filter:blur(12px);
  color:var(--text-1);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--primary);border-color:rgba(47,224,208,.5);}
.to-top svg{width:18px;height:18px;}

/* ============ 响应式：平板图标侧栏 ============ */
@media (min-width:768px) and (max-width:1023px){
  :root{--sidebar-w:88px;}
  .brand-text,.nav-label,.foot-text{display:none;}
  .sidebar-brand{justify-content:center;padding:0;}
  .nav-item{justify-content:center;padding:0;gap:0;}
  .nav-item::before{left:0;}
  .sidebar-foot{padding:12px 10px 16px;}
  .sidebar-foot .btn{width:44px;padding:0;height:44px;}
  .sidebar-foot .btn span{display:none;}
  .container{padding:0 32px;}
  .page-head-grid{grid-template-columns:1.2fr .8fr;gap:28px;}
  .split{gap:32px;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .crosslinks{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .flow-row{grid-template-columns:56px 200px 1fr;gap:16px;}
}

/* ============ 响应式：手机 ============ */
@media (max-width:767px){
  .topbar{display:flex;}
  .sidebar{
    width:100vw;
    max-width:100vw;
    z-index:60;
    transform:translateX(-100%);
    transition:transform .24s var(--ease);
    background:rgba(5,10,20,.96);
    backdrop-filter:blur(16px) saturate(140%);
    -webkit-backdrop-filter:blur(16px) saturate(140%);
  }
  body.nav-open .sidebar{transform:translateX(0);}
  body.nav-open .nav-mask{display:block;}
  body.nav-open{overflow:hidden;}
  .sidebar-close{display:flex;}
  .sidebar-brand{height:76px;flex:0 0 76px;padding:0 18px;}
  .nav-list{padding:14px 0 20px;gap:0;}
  .nav-item{
    height:auto;
    padding:18px 22px;
    font-size:20px;
    font-weight:600;
    border-bottom:1px solid var(--line);
    gap:14px;
  }
  .nav-item svg{width:22px;height:22px;flex:0 0 22px;}
  .sidebar-foot{padding:18px;}
  .foot-text{font-size:12px;}
  .shell{margin-left:0;padding-top:64px;}
  .container{padding:0 18px;}
  .page-head{padding:28px 0 36px;}
  .breadcrumb{margin-bottom:18px;font-size:12.5px;}
  .page-head-grid{grid-template-columns:1fr;gap:26px;min-height:0;}
  .page-head h1{font-size:30px;}
  .page-head-actions{flex-direction:column;align-items:stretch;}
  .page-head-actions .btn{width:100%;}
  .section{padding:56px 0;}
  .section--tight{padding:48px 0;}
  .section-head{margin-bottom:30px;}
  .split{grid-template-columns:1fr;gap:24px;}
  .split + .split{margin-top:52px;}
  .split.reverse .split-media{order:0;}
  .num-grid{grid-template-columns:1fr;gap:16px;padding-bottom:0;}
  .num-card{transform:none!important;padding:22px;gap:16px;}
  .num-index{font-size:36px;}
  .stats-band{grid-template-columns:1fr 1fr;}
  .stat{padding:24px 18px;}
  .stat:nth-child(3){border-left:none;}
  .stat:nth-child(n+3){border-top:1px solid var(--line);}
  .flow-row{grid-template-columns:44px 1fr;gap:8px 14px;padding:20px 0;}
  .flow-name{font-size:16.5px;}
  .flow-desc{grid-column:1 / -1;padding-left:0;font-size:14px;}
  .card-grid{grid-template-columns:1fr;}
  .crosslinks{grid-template-columns:1fr;}
  .cta-band{padding:28px 22px;gap:20px;}
  .cta-actions{width:100%;flex-direction:column;}
  .cta-actions .btn{width:100%;}
  .footer{padding:48px 0 22px;}
  .footer-grid{grid-template-columns:1fr;gap:30px;padding-bottom:30px;}
  .footer-desc{max-width:none;}
  .to-top{right:16px;bottom:16px;width:42px;height:42px;}
  .faq-item summary{font-size:16px;padding:18px;}
}
@media (min-width:1400px){
  .container{max-width:1320px;}
}