/* roulang page: index */
:root{
  --bg:#070C18;
  --bg-2:#0C1424;
  --bg-3:#0A1120;
  --primary:#2FD8C6;
  --primary-hover:#5CEBDB;
  --primary-pressed:#1FA89B;
  --amber:#F2A93B;
  --danger:#FF6B6B;
  --text:#E8F2F6;
  --text-2:#A7B6C4;
  --text-3:#6C7C8C;
  --border:rgba(255,255,255,.08);
  --divider:rgba(255,255,255,.06);
  --glass:rgba(255,255,255,.04);
  --glass-border:rgba(47,216,198,.14);
  --glow:0 0 0 1px rgba(47,216,198,.35), 0 8px 30px -8px rgba(47,216,198,.45);
  --shadow-card:0 12px 32px -20px rgba(0,0,0,.8);
  --shadow-float:0 24px 60px -24px rgba(0,0,0,.9);
  --r-lg:20px;
  --r-md:14px;
  --r-sm:10px;
  --r-pill:999px;
  --bs-primary:#2FD8C6;
  --bs-body-bg:#070C18;
  --bs-body-color:#E8F2F6;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-link-color:#2FD8C6;
  --bs-link-hover-color:#5CEBDB;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:0;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(255,255,255,.028) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.028) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.6;
}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--primary-hover);}
h1,h2,h3,h4{margin:0;font-weight:650;letter-spacing:-.01em;line-height:1.28;color:var(--text);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.container-xxl, .container{max-width:1200px;}
@media (min-width:1400px){.container-xxl{max-width:1280px;}}

/* ============ 区块通用 ============ */
.section{position:relative;z-index:1;padding:104px 0;}
.section--tight{padding:80px 0;}
.section--alt{background:var(--bg-2);border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);}
.section-head{max-width:760px;margin-bottom:52px;}
.section-head--center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--primary);
  text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--primary);opacity:.7;}
.section-head h2{font-size:clamp(24px,2.6vw,36px);margin-bottom:16px;}
.section-head p{color:var(--text-2);font-size:16px;}
.lead{color:var(--text-2);font-size:17px;line-height:1.8;}

/* ============ 按钮 ============ */
.btn{
  --bs-btn-border-radius:var(--r-sm);
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:11px 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,filter .18s ease;
}
.btn-main{
  background:var(--primary);color:#04161A;
  box-shadow:var(--glow);
}
.btn-main:hover{background:var(--primary-hover);color:#04161A;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(47,216,198,.45),0 14px 34px -10px rgba(47,216,198,.55);}
.btn-main:active{background:var(--primary-pressed);transform:translateY(0);box-shadow:0 0 0 1px rgba(47,216,198,.3),0 6px 18px -8px rgba(47,216,198,.4);}
.btn-ghost{
  background:transparent;color:var(--text);border-color:var(--border);
}
.btn-ghost:hover{background:rgba(47,216,198,.08);border-color:var(--glass-border);color:var(--primary-hover);}
.btn-ghost:active{background:rgba(47,216,198,.12);}
.btn-sm{min-height:38px;padding:9px 16px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.disabled{filter:saturate(.6);opacity:.6;pointer-events:none;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;
  color:var(--primary);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
}
.link-arrow svg{transition:transform .18s ease;}
.link-arrow:hover svg{transform:translateX(3px);}
.link-arrow:hover{color:var(--primary-hover);}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(7,12,24,.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--divider);
  transition:background-color .2s ease,border-color .2s ease;
}
.site-header.scrolled{background:rgba(7,12,24,.9);border-bottom-color:var(--border);}
.nav-inner{
  display:flex;align-items:center;gap:22px;height:64px;
  transition:height .2s ease;
}
.site-header.scrolled .nav-inner{height:56px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--text);}
.brand:hover{color:var(--text);}
.brand-mark{
  width:36px;height:36px;border-radius:11px;flex:0 0 auto;
  display:grid;place-items:center;
  background:linear-gradient(160deg,rgba(47,216,198,.22),rgba(47,216,198,.06));
  border:1px solid var(--glass-border);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-main{font-size:17px;font-weight:700;letter-spacing:.01em;color:var(--text);}
.brand-sub{font-size:11px;color:var(--primary);letter-spacing:.16em;}
.nav-channels{display:flex;align-items:center;gap:4px;margin-left:8px;}
.nav-link{
  position:relative;padding:8px 12px;border-radius:var(--r-sm);
  font-size:14.5px;color:var(--text-2);white-space:nowrap;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-link.active{color:var(--text);}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 10px rgba(47,216,198,.8);
}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.04);border:1px solid var(--border);
  transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.nav-search:focus-within{border-color:var(--glass-border);box-shadow:0 0 0 3px rgba(47,216,198,.12);background:rgba(255,255,255,.06);}
.nav-search svg{flex:0 0 auto;color:var(--text-3);}
.nav-search input{
  width:150px;background:transparent;border:0;outline:none;color:var(--text);font-size:14px;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-toggle{
  width:44px;height:44px;padding:0;border-radius:var(--r-sm);
  background:rgba(255,255,255,.04);border:1px solid var(--border);color:var(--text);
  display:grid;place-items:center;
}
.nav-toggle:hover{background:rgba(47,216,198,.08);border-color:var(--glass-border);}
.offcanvas{
  --bs-offcanvas-bg:var(--bg-3);
  --bs-offcanvas-color:var(--text);
  --bs-offcanvas-width:320px;
  --bs-offcanvas-border-color:var(--border);
  background:var(--bg-3);
}
.offcanvas-header{border-bottom:1px solid var(--divider);}
.offcanvas-title{font-size:16px;font-weight:650;}
.mobile-nav-list{display:flex;flex-direction:column;gap:4px;}
.mobile-nav-list a{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 14px;border-radius:var(--r-md);
  color:var(--text-2);font-size:15px;border:1px solid transparent;
}
.mobile-nav-list a:hover{background:rgba(255,255,255,.04);color:var(--text);border-color:var(--border);}
.mobile-nav-list a.active{color:var(--primary);border-color:var(--glass-border);background:rgba(47,216,198,.07);}
.mobile-search{
  display:flex;align-items:center;gap:8px;height:44px;padding:0 14px;margin:20px 0 8px;
  border-radius:var(--r-pill);background:rgba(255,255,255,.04);border:1px solid var(--border);
}
.mobile-search input{flex:1;background:transparent;border:0;outline:none;color:var(--text);font-size:14px;}
.btn-close{filter:invert(1) grayscale(1) brightness(2);opacity:.6;}

/* ============ Hero ============ */
.hero{
  position:relative;z-index:1;
  padding:72px 0 88px;
  min-height:560px;
  display:flex;align-items:center;
  overflow:hidden;
  background:linear-gradient(180deg,rgba(7,12,24,.4),rgba(7,12,24,1)),var(--bg);
}
.hero-bg{
  position:absolute;inset:0;z-index:-1;
  background-image:url(/assets/images/backpic/back-1.webp);
  background-size:cover;background-position:center;
  opacity:.32;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(7,12,24,.96) 22%,rgba(7,12,24,.62) 62%,rgba(7,12,24,.88) 100%);
}
.hero h1{font-size:clamp(30px,4.4vw,56px);margin-bottom:20px;}
.hero h1 .accent{color:var(--primary);}
.hero-sub{font-size:17px;color:var(--text-2);max-width:560px;margin-bottom:32px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:40px;}
.trust-row{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;
  border-top:1px solid var(--divider);padding-top:24px;
}
.trust-item{display:flex;flex-direction:column;gap:2px;}
.trust-num{font-size:19px;font-weight:700;color:var(--text);font-variant-numeric:tabular-nums;}
.trust-label{font-size:12.5px;color:var(--text-3);}
.hero-visual{position:relative;}
.visual-card{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--border);
  background-image:url(/assets/images/backpic/back-2.png);
  background-size:cover;background-position:center;
  box-shadow:var(--shadow-float);
  aspect-ratio:16/11;
}
.visual-card::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,24,.35),rgba(7,12,24,.86));
}
.visual-badge{
  position:absolute;top:16px;left:16px;z-index:2;
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 13px;border-radius:var(--r-pill);font-size:12.5px;color:var(--text);
  background:rgba(7,12,24,.6);border:1px solid var(--glass-border);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
}
.dot-live{width:7px;height:7px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 4px rgba(47,216,198,.16);}
.glass-bar{
  position:absolute;left:18px;right:18px;bottom:18px;z-index:2;
  display:grid;grid-template-columns:repeat(3,1fr);gap:12px;
  padding:18px;border-radius:var(--r-md);
  background:var(--glass);border:1px solid var(--glass-border);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.glass-bar .gb-item{display:flex;flex-direction:column;gap:3px;min-width:0;}
.gb-num{font-size:18px;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums;}
.gb-label{font-size:12px;color:var(--text-2);}

/* ============ 价值主张 ============ */
.value-grid{display:grid;grid-template-columns:1.65fr 1fr;gap:40px;align-items:start;}
.value-points{display:flex;flex-direction:column;gap:22px;}
.value-point{
  padding:24px 26px;border-radius:var(--r-md);
  background:var(--bg-3);border:1px solid var(--border);
  transition:border-color .18s ease,transform .18s ease;
}
.value-point:hover{border-color:var(--glass-border);transform:translateY(-2px);}
.value-point h3{font-size:19px;margin-bottom:8px;}
.value-point p{color:var(--text-2);font-size:15px;}
.value-aside{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border);
  background:var(--bg-3);
}
.value-aside img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.value-aside-body{padding:22px 22px 26px;}
.value-aside-body h3{font-size:17px;margin-bottom:10px;}
.value-aside-body p{color:var(--text-2);font-size:14.5px;margin-bottom:16px;}
.mini-list{display:flex;flex-direction:column;gap:10px;margin-bottom:18px;}
.mini-list li{display:flex;gap:9px;font-size:14.5px;color:var(--text-2);}
.mini-list li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;margin-top:9px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 8px rgba(47,216,198,.7);
}

/* ============ Bento 功能区 ============ */
.bento{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;
}
.bento-card{
  grid-column:span 1;
  display:flex;flex-direction:column;
  padding:26px;border-radius:var(--r-lg);
  background:var(--bg-3);border:1px solid var(--border);
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.bento-card:hover{border-color:var(--glass-border);transform:translateY(-3px);box-shadow:var(--shadow-card);}
.bento-card--wide{grid-column:span 2;}
.bento-card--tall{grid-row:span 2;}
.bento-icon{
  width:42px;height:42px;border-radius:12px;margin-bottom:18px;
  display:grid;place-items:center;color:var(--primary);
  background:rgba(47,216,198,.09);border:1px solid var(--glass-border);
}
.bento-card h3{font-size:20px;margin-bottom:10px;}
.bento-card > p{color:var(--text-2);font-size:14.8px;margin-bottom:18px;}
.bento-list{display:flex;flex-direction:column;gap:9px;margin-bottom:20px;}
.bento-list li{display:flex;gap:9px;font-size:14.5px;color:var(--text-2);}
.bento-list li svg{flex:0 0 auto;margin-top:5px;color:var(--primary);}
.bento-card .link-arrow{margin-top:auto;font-size:14.5px;}
.bento-media{
  margin:-26px -26px 20px;border-radius:var(--r-lg) var(--r-lg) 0 0;overflow:hidden;
}
.bento-media img{width:100%;aspect-ratio:16/7;object-fit:cover;}

/* ============ 使用场景 ============ */
.scene-row{
  display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;
  padding:34px 0;
  border-top:1px solid var(--divider);
}
.scene-row:first-child{border-top:0;padding-top:0;}
.scene-row:last-child{padding-bottom:0;}
.scene-media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border);position:relative;}
.scene-media img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .35s ease;}
.scene-media:hover img{transform:scale(1.03);}
.scene-tag{
  position:absolute;top:14px;left:14px;
  padding:5px 12px;border-radius:var(--r-pill);font-size:12.5px;
  background:rgba(7,12,24,.68);border:1px solid var(--glass-border);color:var(--primary);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.scene-num{
  font-size:13px;color:var(--primary);letter-spacing:.14em;font-variant-numeric:tabular-nums;
  margin-bottom:12px;display:block;
}
.scene-body h3{font-size:22px;margin-bottom:14px;}
.scene-meta{display:flex;flex-direction:column;gap:12px;margin-bottom:22px;}
.scene-meta div{display:flex;gap:10px;font-size:14.8px;color:var(--text-2);}
.scene-meta strong{color:var(--text);font-weight:600;flex:0 0 auto;}
.scene-row--reverse .scene-media{order:2;}

/* ============ 案例 ============ */
.case-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:20px;}
.case-card{
  display:flex;flex-direction:column;justify-content:space-between;gap:20px;
  padding:28px;border-radius:var(--r-lg);
  background:var(--bg-3);border:1px solid var(--border);
  transition:border-color .2s ease,transform .2s ease;
}
.case-card:hover{border-color:var(--glass-border);transform:translateY(-3px);}
.case-card--lead{padding:34px;background:linear-gradient(160deg,rgba(47,216,198,.08),rgba(10,17,32,.9));}
.case-quote{font-size:16.5px;line-height:1.8;color:var(--text);}
.case-card--lead .case-quote{font-size:19px;}
.case-person{display:flex;align-items:center;gap:12px;margin-top:22px;}
.case-avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 auto;display:grid;place-items:center;
  font-size:14px;font-weight:700;color:#04161A;background:linear-gradient(150deg,#5CEBDB,#2FD8C6);
}
.case-avatar--amber{background:linear-gradient(150deg,#F7C878,#F2A93B);}
.case-id{display:flex;flex-direction:column;line-height:1.4;}
.case-id strong{font-size:14.5px;font-weight:600;}
.case-id span{font-size:12.5px;color:var(--text-3);}
.case-col{display:flex;flex-direction:column;gap:20px;}

/* ============ 价格 ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;align-items:stretch;}
.price-card{
  display:flex;flex-direction:column;gap:20px;
  padding:30px 28px;border-radius:var(--r-lg);
  background:var(--bg-3);border:1px solid var(--border);
  transition:transform .2s ease,border-color .2s ease;
}
.price-card:hover{transform:translateY(-3px);border-color:var(--glass-border);}
.price-card--featured{
  background:var(--glass);border:1px solid rgba(47,216,198,.4);
  box-shadow:var(--glow);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
}
.price-badge{
  align-self:flex-start;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12.5px;color:#2A1A02;background:var(--amber);font-weight:700;
}
.price-tier{font-size:15px;color:var(--text-2);}
.price-name{font-size:22px;font-weight:700;}
.price-amount{display:flex;align-items:baseline;gap:8px;font-variant-numeric:tabular-nums;}
.price-num{font-size:38px;font-weight:700;letter-spacing:-.02em;color:var(--text);}
.price-unit{font-size:14px;color:var(--text-3);}
.price-fit{font-size:14px;color:var(--text-2);padding-top:4px;border-top:1px solid var(--divider);}
.price-fit strong{color:var(--text);font-weight:600;display:block;margin-bottom:4px;font-size:13px;}
.price-includes{display:flex;flex-direction:column;gap:10px;margin:0;}
.price-includes li{display:flex;gap:9px;font-size:14.5px;color:var(--text-2);}
.price-includes li svg{flex:0 0 auto;margin-top:5px;color:var(--primary);}
.price-card .btn{margin-top:auto;}

/* ============ 资讯列表 ============ */
.info-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.info-card{
  display:flex;flex-direction:column;overflow:hidden;
  border-radius:var(--r-md);background:var(--bg-3);border:1px solid var(--border);
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.info-card:hover{transform:translateY(-2px);border-color:var(--glass-border);box-shadow:var(--shadow-card);}
.info-thumb{position:relative;display:block;overflow:hidden;aspect-ratio:16/9;background:#0A1120;}
.info-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .18s ease;}
.info-card:hover .info-thumb img{transform:scale(1.03);}
.badge-cat{
  position:absolute;top:12px;left:12px;
  padding:4px 11px;border-radius:var(--r-pill);font-size:12px;
  color:var(--primary);background:rgba(7,12,24,.72);border:1px solid var(--glass-border);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
}
.info-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.info-title{font-size:17px;line-height:1.5;}
.info-title a{color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.info-title a:hover{color:var(--primary-hover);}
.info-sum{
  font-size:14.5px;color:var(--text-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.info-meta{
  display:flex;align-items:center;gap:8px;margin-top:auto;padding-top:12px;
  border-top:1px solid var(--divider);font-size:13px;color:var(--text-3);
}
.info-meta .link-arrow{margin-left:auto;font-size:13.5px;text-decoration:none;}
.info-empty{
  grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:14px;
  padding:52px 24px;border-radius:var(--r-lg);text-align:center;
  background:var(--glass);border:1px solid var(--border);
}
.info-empty svg{color:var(--text-3);}
.info-empty p{color:var(--text-2);font-size:15px;}
.info-more{display:flex;justify-content:center;margin-top:40px;}

/* ============ FAQ ============ */
.faq-list{max-width:880px;margin:0 auto;border-top:1px solid var(--divider);}
.faq-item{border-bottom:1px solid var(--divider);}
.faq-item summary{
  display:flex;align-items:flex-start;gap:16px;
  padding:22px 4px;cursor:pointer;list-style:none;
  font-size:17px;font-weight:600;color:var(--text);
  transition:color .18s ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--primary-hover);}
.faq-index{font-size:13px;color:var(--primary);font-variant-numeric:tabular-nums;padding-top:5px;flex:0 0 auto;}
.faq-icon{
  margin-left:auto;flex:0 0 auto;width:22px;height:22px;position:relative;
  transition:transform .18s ease;margin-top:4px;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--primary);border-radius:2px;
}
.faq-icon::before{left:10px;top:2px;width:2px;height:18px;}
.faq-icon::after{top:10px;left:2px;height:2px;width:18px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-answer{
  padding:0 40px 24px 42px;color:var(--text-2);font-size:15.3px;line-height:1.85;max-width:68ch;
}

/* ============ CTA 条 ============ */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  padding:56px 48px;
  background:linear-gradient(150deg,rgba(47,216,198,.12),rgba(10,17,32,.95));
  border:1px solid var(--glass-border);
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,216,198,.16),transparent 68%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(22px,2.4vw,32px);margin-bottom:14px;}
.cta-band p{color:var(--text-2);max-width:620px;font-size:16px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;z-index:1;margin-top:0;
  background:var(--bg-3);border-top:1px solid var(--border);
  padding:64px 0 0;
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-desc{color:var(--text-2);font-size:14.5px;max-width:320px;}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{color:var(--text-2);font-size:14.5px;}
.footer-col a:hover{color:var(--primary);}
.footer-contact li{color:var(--text-2);font-size:14.5px;display:flex;gap:8px;}
.footer-bottom{
  margin-top:52px;padding:20px 0;border-top:1px solid var(--divider);
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  font-size:13.5px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);}
.footer-bottom a:hover{color:var(--primary);}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:1040;
  width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;color:var(--text);
  background:rgba(10,17,32,.72);border:1px solid var(--glass-border);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,color .2s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--primary);}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .section{padding:88px 0;}
  .nav-search input{width:120px;}
  .info-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:991px){
  .hero{padding:56px 0 64px;min-height:auto;}
  .hero h1{font-size:clamp(28px,6vw,40px);}
  .hero-visual{margin-top:40px;}
  .value-grid{grid-template-columns:1fr;gap:28px;}
  .bento{grid-template-columns:repeat(2,minmax(0,1fr));}
  .bento-card--wide{grid-column:span 2;}
  .bento-card--tall{grid-row:auto;}
  .scene-row{grid-template-columns:1fr;gap:24px;}
  .scene-row--reverse .scene-media{order:0;}
  .case-grid{grid-template-columns:1fr;}
  .price-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{padding:40px 28px;}
}
@media (max-width:767px){
  .section{padding:64px 0;}
  .section-head{margin-bottom:36px;}
  .trust-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;}
  .info-grid{grid-template-columns:1fr;}
  .glass-bar{grid-template-columns:1fr;gap:10px;}
  .faq-answer{padding:0 16px 22px 42px;}
}
@media (max-width:575px){
  body{font-size:15.5px;}
  .hero-cta .btn{width:100%;}
  .bento{grid-template-columns:1fr;}
  .bento-card--wide{grid-column:span 1;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-actions .btn{width:100%;}
  .brand-sub{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --bg:#070C18;
  --bg-2:#0C1424;
  --bg-3:#0A1120;
  --primary:#2FD8C6;
  --primary-hover:#5CEBDB;
  --primary-pressed:#1FA89B;
  --amber:#F2A93B;
  --danger:#FF6B6B;
  --text:#E8F2F6;
  --text-2:#A7B6C4;
  --text-3:#6C7C8C;
  --border:rgba(255,255,255,.08);
  --divider:rgba(255,255,255,.06);
  --glass:rgba(255,255,255,.04);
  --glass-border:rgba(47,216,198,.14);
  --glow:0 0 0 1px rgba(47,216,198,.35), 0 8px 30px -8px rgba(47,216,198,.45);
  --shadow-card:0 12px 32px -20px rgba(0,0,0,.8);
  --shadow-pop:0 24px 60px -24px rgba(0,0,0,.9);
  --r-lg:20px;
  --r:14px;
  --r-btn:10px;
  --r-pill:999px;
  --container:1200px;

  --bs-primary:#2FD8C6;
  --bs-body-bg:#070C18;
  --bs-body-color:#E8F2F6;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-link-color:#2FD8C6;
  --bs-link-hover-color:#5CEBDB;
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.55;
  mask-image:radial-gradient(circle at 50% 18%,#000 0%,transparent 78%);
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--primary);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--primary-hover);}
h1,h2,h3,h4{font-weight:650;letter-spacing:-.01em;color:var(--text);margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;}
::selection{background:rgba(47,216,198,.3);color:#fff;}

.container-xxl{max-width:var(--container);padding-inline:20px;margin-inline:auto;}
@media (min-width:1440px){.container-xxl{max-width:1280px;}}

/* ============ 头部 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1040;
  background:rgba(7,12,24,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--divider);
  transition:background .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{background:rgba(7,12,24,.92);border-bottom-color:var(--border);}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:64px;
  transition:height .2s ease;
}
.site-header.is-scrolled .header-inner{height:56px;}

.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--text);}
.brand:hover{color:var(--text);}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;
  background:rgba(47,216,198,.08);
  border:1px solid var(--glass-border);
  box-shadow:0 0 0 1px rgba(47,216,198,.08) inset;
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-main{font-size:17px;font-weight:700;letter-spacing:.02em;}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.16em;}

.nav-channels{align-items:center;gap:4px;margin-inline:auto;}
.nav-channels .nav-link{
  position:relative;
  display:block;
  padding:8px 14px;
  font-size:14.5px;
  color:var(--text-2);
  border-radius:var(--r-btn);
  white-space:nowrap;
  transition:color .18s ease,background .18s ease;
}
.nav-channels .nav-link:hover{color:var(--text);background:rgba(255,255,255,.05);}
.nav-channels .nav-link.active{color:var(--text);font-weight:600;}
.nav-channels .nav-link.active::after{
  content:"";
  position:absolute;left:14px;right:14px;bottom:-1px;height:2px;
  border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 12px rgba(47,216,198,.75);
}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-search{
  position:relative;
  display:flex;align-items:center;
}
.nav-search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);opacity:.55;}
.nav-search input{
  width:180px;height:40px;
  padding:0 14px 0 36px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  border-radius:var(--r-pill);
  color:var(--text);
  font-size:13.5px;
  outline:none;
  transition:border-color .18s ease,box-shadow .18s ease,width .2s ease;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search input:focus{border-color:rgba(47,216,198,.55);box-shadow:0 0 0 3px rgba(47,216,198,.14);width:214px;}

/* 按钮体系 */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--text);
  --btn-bd:transparent;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;
  padding:0 20px;
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.01em;
  border-radius:var(--r-btn);
  border:1px solid var(--btn-bd);
  background:var(--btn-bg);
  color:var(--btn-fg);
  line-height:1;
  text-align:center;
  cursor:pointer;
  transition:transform .16s ease,box-shadow .2s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn:hover{color:var(--btn-fg);}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px;}
.btn-primary{
  --btn-bg:var(--primary);
  --btn-fg:#04140F;
  --btn-bd:var(--primary);
  box-shadow:var(--glow);
}
.btn-primary:hover{--btn-bg:var(--primary-hover);--btn-bd:var(--primary-hover);transform:translateY(-1px);box-shadow:0 0 0 1px rgba(92,235,219,.4),0 14px 34px -10px rgba(47,216,198,.62);}
.btn-primary:active{--btn-bg:var(--primary-pressed);--btn-bd:var(--primary-pressed);transform:translateY(0);box-shadow:0 0 0 1px rgba(31,168,155,.5),0 6px 18px -8px rgba(47,216,198,.5);}
.btn-ghost{
  --btn-bg:transparent;
  --btn-fg:var(--text);
  --btn-bd:var(--border);
}
.btn-ghost:hover{background:rgba(47,216,198,.1);border-color:rgba(47,216,198,.45);color:var(--text);transform:translateY(-1px);}
.btn-ghost:active{transform:translateY(0);background:rgba(47,216,198,.16);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  padding:0;min-height:auto;background:none;border:0;
  color:var(--primary);font-weight:600;font-size:14.5px;
  text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;
}
.btn-text .arw{transition:transform .18s ease;}
.btn-text:hover .arw{transform:translateX(3px);}
.btn:disabled,.btn.disabled{filter:saturate(.4);opacity:.6;pointer-events:none;}

.nav-toggle{
  width:44px;height:44px;margin-left:auto;
  display:grid;place-items:center;
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  border-radius:var(--r-btn);
  color:var(--text);
  cursor:pointer;
}
.nav-toggle:hover{border-color:rgba(47,216,198,.45);}

/* 移动端抽屉 */
.offcanvas.offcanvas-end{
  background:var(--bg-2);
  border-left:1px solid var(--border);
  color:var(--text);
  width:min(340px,86vw);
}
.offcanvas-header{border-bottom:1px solid var(--divider);padding:16px 20px;}
.offcanvas-body{padding:20px;}
.mnav-list{display:flex;flex-direction:column;gap:4px;margin-bottom:20px;}
.mnav-list a{
  display:block;padding:12px 14px;border-radius:var(--r-btn);
  color:var(--text-2);font-size:15px;border:1px solid transparent;
}
.mnav-list a:hover{background:rgba(255,255,255,.05);color:var(--text);}
.mnav-list a.active{color:var(--text);background:rgba(47,216,198,.1);border-color:var(--glass-border);font-weight:600;}
.mnav-search{position:relative;margin-bottom:18px;}
.mnav-search input{width:100%;height:44px;padding:0 14px 0 38px;background:rgba(255,255,255,.04);border:1px solid var(--border);border-radius:var(--r-pill);color:var(--text);font-size:14px;outline:none;}
.mnav-search input:focus{border-color:rgba(47,216,198,.55);box-shadow:0 0 0 3px rgba(47,216,198,.14);}
.mnav-search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);opacity:.5;}
.mnav-actions{display:grid;gap:10px;}
.btn-close{filter:invert(1) grayscale(1) brightness(1.6);opacity:.7;}

/* ============ 页面 Hero ============ */
.page-hero{
  position:relative;
  padding:64px 0 56px;
  background-image:linear-gradient(180deg,rgba(7,12,24,.82) 0%,rgba(7,12,24,.94) 62%,var(--bg) 100%),url("/assets/images/backpic/back-2.png");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--divider);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;right:-140px;top:-120px;width:420px;height:420px;
  background:radial-gradient(circle,rgba(47,216,198,.16) 0%,transparent 68%);
  pointer-events:none;
}
.page-hero .container-xxl{position:relative;z-index:1;}

.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:20px;
  background:none;padding:0;
}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{color:var(--text-2);}

.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.badge-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;
  font-size:12.5px;font-weight:500;
  color:var(--primary);
  background:rgba(47,216,198,.08);
  border:1px solid rgba(47,216,198,.22);
  border-radius:var(--r-pill);
  line-height:1;
}
.badge-tag.amber{color:var(--amber);background:rgba(242,169,59,.08);border-color:rgba(242,169,59,.24);}
.badge-tag.muted{color:var(--text-2);background:rgba(255,255,255,.05);border-color:var(--border);}

.page-hero h1{
  font-size:clamp(28px,3.6vw,44px);
  line-height:1.28;
  max-width:900px;
  margin-bottom:18px;
}
.page-hero h1 .hl{color:var(--primary);}
.hero-lead{
  max-width:760px;
  font-size:16.5px;
  color:var(--text-2);
  line-height:1.85;
}
.hero-meta{
  display:flex;flex-wrap:wrap;gap:28px;
  margin-top:32px;
  padding-top:24px;
  border-top:1px solid var(--divider);
}
.hero-meta div{display:flex;flex-direction:column;gap:2px;}
.hero-meta strong{font-size:20px;font-weight:700;color:var(--text);}
.hero-meta span{font-size:12.5px;color:var(--text-3);letter-spacing:.02em;}

/* ============ 主体布局 ============ */
.main-wrap{padding:56px 0 72px;position:relative;z-index:1;}
@media (min-width:992px){.main-wrap{padding:72px 0 96px;}}

.toc-nav{
  position:sticky;top:88px;
  padding:22px;
  background:var(--bg-2);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
}
.toc-nav h2{
  font-size:13px;letter-spacing:.14em;color:var(--text-3);
  font-weight:600;margin-bottom:14px;text-transform:uppercase;
}
.toc-nav ul{display:flex;flex-direction:column;gap:2px;}
.toc-nav a{
  display:flex;gap:10px;
  padding:9px 12px;
  font-size:14px;
  color:var(--text-2);
  border-left:2px solid transparent;
  border-radius:0 var(--r-btn) var(--r-btn) 0;
  transition:color .18s ease,background .18s ease,border-color .18s ease;
}
.toc-nav a:hover{color:var(--text);background:rgba(255,255,255,.04);border-left-color:rgba(47,216,198,.5);}
.toc-nav a em{font-style:normal;color:var(--text-3);font-size:12px;min-width:16px;}
.toc-foot{
  margin-top:18px;padding-top:18px;border-top:1px solid var(--divider);
  font-size:13px;color:var(--text-3);line-height:1.7;
}

.anchor-chips{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px;margin-bottom:28px;}
.anchor-chips a{
  flex:0 0 auto;
  padding:8px 14px;font-size:13px;
  color:var(--text-2);
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
  border-radius:var(--r-pill);
  white-space:nowrap;
}
.anchor-chips a:hover{color:var(--text);border-color:rgba(47,216,198,.45);}

/* 内容区块 */
.content-block{padding-bottom:56px;margin-bottom:56px;border-bottom:1px solid var(--divider);scroll-margin-top:96px;}
.content-block:last-of-type{border-bottom:0;margin-bottom:0;padding-bottom:24px;}
.content-block h2{
  font-size:clamp(22px,2.4vw,30px);
  margin-bottom:14px;
  display:flex;align-items:baseline;gap:12px;flex-wrap:wrap;
}
.content-block h2 .idx{
  font-size:13px;font-weight:700;color:var(--primary);
  letter-spacing:.1em;
  padding:4px 10px;
  border:1px solid rgba(47,216,198,.28);
  border-radius:var(--r-pill);
  background:rgba(47,216,198,.07);
  transform:translateY(-4px);
}
.content-block > p{color:var(--text-2);max-width:74ch;margin-bottom:16px;}
.content-block > p strong{color:var(--text);font-weight:600;}

.figure-inline{
  margin:24px 0;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--border);
  background:var(--bg-2);
  box-shadow:var(--shadow-card);
}
.figure-inline img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.figure-inline figcaption{
  padding:12px 18px;
  font-size:13px;color:var(--text-3);
  border-top:1px solid var(--divider);
}

/* 步骤列表 */
.step-list{counter-reset:st;display:flex;flex-direction:column;gap:2px;margin:22px 0 8px;}
.step-list li{
  counter-increment:st;
  position:relative;
  padding:18px 20px 18px 66px;
  background:var(--bg-2);
  border:1px solid var(--border);
  border-radius:var(--r);
  transition:border-color .18s ease,transform .18s ease;
}
.step-list li + li{margin-top:10px;}
.step-list li::before{
  content:counter(st,decimal-leading-zero);
  position:absolute;left:20px;top:18px;
  font-size:13px;font-weight:700;color:var(--primary);
  letter-spacing:.06em;
}
.step-list li:hover{border-color:rgba(47,216,198,.32);transform:translateX(2px);}
.step-list h3{font-size:16.5px;margin-bottom:6px;}
.step-list p{font-size:14.5px;color:var(--text-2);line-height:1.75;}

/* 核对卡网格 */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px;}
.check-card{
  padding:20px;
  background:var(--bg-3);
  border:1px solid var(--border);
  border-radius:var(--r);
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.check-card:hover{border-color:rgba(47,216,198,.34);transform:translateY(-2px);box-shadow:var(--shadow-card);}
.check-card h3{font-size:16px;margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.check-card h3 .dot{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px rgba(47,216,198,.8);flex:0 0 auto;}
.check-card p{font-size:14px;color:var(--text-2);line-height:1.75;}

/* 对照行 */
.compare-list{margin-top:22px;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;background:var(--bg-2);}
.compare-row{
  display:grid;grid-template-columns:1.05fr 1.2fr;
  border-bottom:1px solid var(--divider);
}
.compare-row:last-child{border-bottom:0;}
.compare-row .cell{padding:18px 22px;font-size:14.5px;line-height:1.75;}
.compare-row .cell:first-child{
  color:var(--text);
  font-weight:600;
  background:rgba(255,255,255,.02);
  border-right:1px solid var(--divider);
}
.compare-row .cell:last-child{color:var(--text-2);}
.compare-head{background:rgba(47,216,198,.06);}
.compare-head .cell{font-size:12.5px;letter-spacing:.1em;color:var(--text-3);text-transform:uppercase;}

/* 特性行 */
.feature-rows{display:flex;flex-direction:column;gap:14px;margin-top:22px;}
.feature-row{
  display:grid;grid-template-columns:230px 1fr;gap:24px;
  padding:20px 22px;
  background:var(--bg-2);
  border:1px solid var(--border);
  border-radius:var(--r);
}
.feature-row h3{font-size:16.5px;display:flex;align-items:center;gap:10px;}
.feature-row h3 svg{flex:0 0 auto;}
.feature-row p{font-size:14.5px;color:var(--text-2);line-height:1.78;}
.feature-row p + p{margin-top:8px;}

/* 图文交错 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;margin-top:24px;}
.split .split-media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow-card);}
.split .split-media img{width:100%;aspect-ratio:3/2;object-fit:cover;}
.split h3{font-size:19px;margin-bottom:12px;}
.split ul{display:flex;flex-direction:column;gap:10px;margin-top:14px;}
.split ul li{
  position:relative;padding-left:20px;
  font-size:14.5px;color:var(--text-2);line-height:1.75;
}
.split ul li::before{
  content:"";position:absolute;left:0;top:9px;
  width:7px;height:7px;border-radius:2px;
  background:var(--primary);opacity:.85;
}

/* 提示条 */
.notice{
  display:flex;gap:14px;
  margin-top:22px;
  padding:18px 20px;
  background:linear-gradient(90deg,rgba(242,169,59,.09),rgba(242,169,59,.02));
  border:1px solid rgba(242,169,59,.24);
  border-left:3px solid var(--amber);
  border-radius:var(--r);
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.78;
}
.notice strong{color:var(--amber);font-weight:600;}

/* 流程时间轴 */
.timeline{position:relative;margin-top:26px;padding-left:28px;}
.timeline::before{
  content:"";position:absolute;left:6px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,rgba(47,216,198,.55),rgba(47,216,198,.06));
}
.timeline li{position:relative;padding-bottom:26px;}
.timeline li:last-child{padding-bottom:0;}
.timeline li::before{
  content:"";position:absolute;left:-27px;top:7px;
  width:11px;height:11px;border-radius:50%;
  background:var(--bg);
  border:2px solid var(--primary);
  box-shadow:0 0 10px rgba(47,216,198,.6);
}
.timeline h3{font-size:16px;margin-bottom:6px;}
.timeline p{font-size:14.5px;color:var(--text-2);line-height:1.78;max-width:68ch;}

/* FAQ */
.faq-section{margin-top:8px;}
.faq-section > h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:10px;}
.faq-section > p{color:var(--text-2);margin-bottom:26px;max-width:70ch;}
.accordion{--bs-accordion-bg:transparent;--bs-accordion-border-color:transparent;--bs-accordion-btn-focus-box-shadow:none;}
.accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--divider);
}
.accordion-item:first-child{border-top:1px solid var(--divider);}
.accordion-button{
  display:flex;align-items:center;gap:14px;
  width:100%;
  padding:22px 8px;
  background:transparent;
  color:var(--text);
  font-size:16.5px;
  font-weight:600;
  line-height:1.6;
  box-shadow:none;
  border-radius:0;
}
.accordion-button:not(.collapsed){color:var(--primary);background:transparent;}
.accordion-button:hover{color:var(--primary-hover);}
.accordion-button:focus{box-shadow:none;outline:2px solid var(--primary);outline-offset:-2px;}
.accordion-button .faq-no{font-size:12.5px;color:var(--text-3);font-weight:700;letter-spacing:.08em;min-width:24px;}
.accordion-button::after{
  content:"+";
  background-image:none!important;
  font-size:22px;font-weight:400;line-height:1;
  color:var(--primary);
  width:auto;height:auto;
  margin-left:auto;
  transform:none;
  transition:transform .18s ease;
}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);}
.accordion-body{
  padding:0 8px 24px 46px;
  color:var(--text-2);
  font-size:15px;
  line-height:1.85;
  max-width:68ch;
}

/* CTA 条 */
.cta-band{
  position:relative;
  margin-top:64px;
  padding:44px 40px;
  border-radius:var(--r-lg);
  background:linear-gradient(120deg,rgba(47,216,198,.1),rgba(12,20,36,.9) 55%);
  border:1px solid var(--glass-border);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-pop);
  overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;bottom:-90px;width:280px;height:280px;
  background:radial-gradient(circle,rgba(47,216,198,.18),transparent 70%);
}
.cta-band .cta-inner{position:relative;z-index:1;display:flex;flex-wrap:wrap;align-items:center;gap:28px;justify-content:space-between;}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);margin-bottom:8px;}
.cta-band p{color:var(--text-2);font-size:15px;max-width:60ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* 页脚 */
.site-footer{
  margin-top:0;
  background:var(--bg-3);
  border-top:1px solid var(--border);
  padding:56px 0 26px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:36px;
  border-bottom:1px solid var(--divider);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:10px;}
.footer-desc{font-size:14px;color:var(--text-2);line-height:1.8;max-width:38ch;}
.footer-col h4{font-size:14px;color:var(--text);margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:14px;color:var(--text-2);}
.footer-col ul a:hover{color:var(--primary);}
.footer-contact li{display:flex;gap:8px;font-size:13.5px;color:var(--text-2);line-height:1.7;}
.footer-contact li span:first-child{color:var(--text-3);flex:0 0 auto;}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  padding-top:22px;
  font-size:13px;color:var(--text-3);
}

/* 返回顶部 */
.back-top{
  position:fixed;right:22px;bottom:26px;z-index:1030;
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:50%;
  background:rgba(12,20,36,.7);
  border:1px solid var(--glass-border);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  color:var(--primary);
  cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{box-shadow:var(--glow);}

/* 响应式 */
@media (max-width:1199.98px){
  .nav-search input{width:150px;}
}
@media (max-width:991.98px){
  .header-inner{height:60px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .split{grid-template-columns:1fr;gap:22px;}
  .feature-row{grid-template-columns:1fr;gap:10px;}
  .page-hero{padding:44px 0 40px;}
  .hero-meta{gap:20px;}
}
@media (max-width:767.98px){
  .check-grid{grid-template-columns:1fr;}
  .compare-row{grid-template-columns:1fr;}
  .compare-row .cell:first-child{border-right:0;border-bottom:1px solid var(--divider);}
  .compare-head{display:none;}
  .cta-band{padding:30px 22px;}
  .main-wrap{padding:40px 0 56px;}
  .content-block{padding-bottom:40px;margin-bottom:40px;}
}
@media (max-width:575.98px){
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .hero-meta{display:grid;grid-template-columns:1fr 1fr;gap:16px 20px;}
  .hero-meta strong{font-size:18px;}
  .accordion-body padding{padding-left:8px;}
  .accordion-body{padding-left:8px;}
  .page-hero h1{font-size:26px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}

/* roulang page: article */
:root{
  --bg:#070C18;
  --bg-2:#0C1424;
  --bg-3:#0A1120;
  --primary:#2FD8C6;
  --primary-hover:#5CEBDB;
  --primary-pressed:#1FA89B;
  --accent:#F2A93B;
  --danger:#FF6B6B;
  --text:#E8F2F6;
  --text-2:#A7B6C4;
  --text-3:#6C7C8C;
  --border:rgba(255,255,255,.08);
  --divider:rgba(255,255,255,.06);
  --glass:rgba(255,255,255,.04);
  --glass-border:rgba(47,216,198,.14);
  --r-xl:20px;
  --r-lg:14px;
  --r-sm:10px;
  --r-pill:999px;
  --sh-card:0 12px 32px -20px rgba(0,0,0,.8);
  --sh-pop:0 24px 60px -24px rgba(0,0,0,.9);
  --glow:0 0 0 1px rgba(47,216,198,.35), 0 8px 30px -8px rgba(47,216,198,.45);
  --container:1200px;
  --bs-body-bg:var(--bg);
  --bs-body-color:var(--text-2);
  --bs-primary:var(--primary);
  --bs-border-color:var(--border);
  --bs-link-color:var(--primary);
  --bs-link-hover-color:var(--primary-hover);
  --bs-font-sans-serif:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text-2);
  font-family:var(--bs-font-sans-serif);
  font-size:16px;
  line-height:1.75;
  font-feature-settings:"tnum";
  -webkit-font-smoothing:antialiased;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:64px 64px;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--primary-hover)}
h1,h2,h3,h4{color:var(--text);font-weight:650;letter-spacing:-.01em;margin:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input{font-family:inherit}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.container-xxl{width:100%;max-width:var(--container);margin:0 auto;padding-inline:24px}
@media (min-width:1200px){.container-xxl{max-width:1280px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(7,12,24,.74);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
  transition:background .25s ease;
}
.site-header.is-scrolled{background:rgba(7,12,24,.94)}
.header-inner{display:flex;align-items:center;gap:22px;height:64px;transition:height .25s ease}
.site-header.is-scrolled .header-inner{height:56px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--text)}
.brand:hover{color:var(--text)}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(160deg,rgba(47,216,198,.18),rgba(47,216,198,.03));
  border:1px solid var(--glass-border);
}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-main{font-size:19px;font-weight:700;letter-spacing:.02em;color:var(--text)}
.brand-sub{font-size:11px;color:var(--primary);letter-spacing:.16em}
.nav-channels{display:flex;align-items:center;gap:4px;margin-inline:auto}
.nav-channels .nav-link{
  position:relative;padding:10px 14px;border-radius:var(--r-sm);
  color:var(--text-2);font-size:15px;transition:color .18s ease,background .18s ease;
}
.nav-channels .nav-link:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-channels .nav-link.active{color:var(--text);font-weight:600}
.nav-channels .nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);box-shadow:0 0 12px rgba(47,216,198,.75);
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.search-box{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;
  border-radius:var(--r-pill);background:rgba(255,255,255,.04);
  border:1px solid var(--border);transition:border-color .18s ease,box-shadow .18s ease;
}
.search-box:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(47,216,198,.16)}
.search-box svg{flex:0 0 auto;opacity:.7}
.search-box input{
  width:190px;background:transparent;border:0;color:var(--text);font-size:14px;outline:none;
}
.search-box input::placeholder{color:var(--text-3)}
.btn-primary-glow,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 20px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary-glow{background:var(--primary);color:#04231F;box-shadow:var(--glow)}
.btn-primary-glow:hover{background:var(--primary-hover);color:#04231F;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(92,235,219,.5),0 14px 36px -10px rgba(47,216,198,.6)}
.btn-primary-glow:active{background:var(--primary-pressed);transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--text-2)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);background:rgba(47,216,198,.08)}
.icon-btn{
  width:44px;height:44px;display:grid;place-items:center;border-radius:var(--r-sm);
  background:transparent;border:1px solid var(--border);color:var(--text-2);cursor:pointer;
  transition:border-color .18s ease,color .18s ease;
}
.icon-btn:hover{border-color:var(--primary);color:var(--primary)}
.offcanvas.mobile-nav{
  background:var(--bg-2);border-left:1px solid var(--border);width:min(86vw,340px);color:var(--text-2);
}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--divider);padding:16px 20px}
.mobile-nav .offcanvas-title{font-size:16px;color:var(--text)}
.mobile-nav .m-list{display:flex;flex-direction:column;padding:12px 8px}
.mobile-nav .m-list a{
  padding:13px 16px;border-radius:var(--r-sm);color:var(--text-2);font-size:15px;
}
.mobile-nav .m-list a:hover,.mobile-nav .m-list a.active{background:rgba(47,216,198,.09);color:var(--primary)}
.mobile-nav .m-actions{display:grid;gap:10px;padding:16px 20px 26px}
.mobile-nav .m-actions .btn-primary-glow,.mobile-nav .m-actions .btn-ghost{width:100%}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;padding:34px 0 40px;
  background:linear-gradient(180deg,rgba(7,12,24,.86) 0%,rgba(7,12,24,.97) 78%,var(--bg) 100%),
             url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  border-bottom:1px solid var(--divider);
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3)}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--primary)}
.crumbs .sep{color:rgba(255,255,255,.2)}
.crumbs .current{color:var(--text-2)}
.article-tagrow{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 16px}
.badge-pill{
  display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 14px;border-radius:var(--r-pill);
  font-size:13px;color:var(--primary);background:rgba(47,216,198,.08);
  border:1px solid rgba(47,216,198,.24);
}
.badge-pill.amber{color:var(--accent);background:rgba(242,169,59,.09);border-color:rgba(242,169,59,.28)}
.article-title{
  font-size:clamp(28px,3.6vw,46px);line-height:1.25;color:var(--text);
  max-width:940px;margin:0 0 16px;
}
.article-lead{max-width:760px;font-size:17px;color:var(--text-2);margin:0 0 22px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;font-size:13.5px;color:var(--text-3)}
.meta-row .meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-row .meta-item svg{opacity:.75}

/* ---------- layout ---------- */
.page-main{padding:56px 0 88px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px}
@media (min-width:992px){.article-layout{grid-template-columns:minmax(0,1fr) 320px;gap:48px}}

.article-panel{
  background:var(--bg-3);border:1px solid var(--border);border-radius:var(--r-xl);
  padding:28px 24px;box-shadow:var(--sh-card);
}
@media (min-width:768px){.article-panel{padding:40px 42px}}
.read-toolbar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding-bottom:20px;margin-bottom:26px;border-bottom:1px solid var(--divider);
}
.read-toolbar .label{font-size:13px;color:var(--text-3);letter-spacing:.06em}
.read-toolbar .links{display:flex;gap:16px;font-size:13.5px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--primary);
  text-decoration:underline;text-underline-offset:4px;text-decoration-color:rgba(47,216,198,.4);
}
.text-link svg{transition:transform .18s ease}
.text-link:hover svg{transform:translateX(3px)}

/* ---------- prose ---------- */
.prose{max-width:860px;font-size:16px;line-height:1.85;color:var(--text-2)}
.prose p{margin:0 0 1.1em}
.prose > h2{
  font-size:clamp(22px,2.3vw,30px);line-height:1.4;margin:2.4em 0 .8em;
  padding-left:14px;border-left:3px solid var(--primary);
}
.prose > h3{font-size:20px;line-height:1.5;margin:2em 0 .6em;color:var(--text)}
.prose > h4{font-size:17px;margin:1.6em 0 .5em;color:var(--text)}
.prose strong{color:var(--text);font-weight:650}
.prose a{color:var(--primary);text-decoration:underline;text-underline-offset:4px}
.prose ul,.prose ol{margin:0 0 1.2em;padding-left:1.35em}
.prose ul li{list-style:disc;margin:.45em 0}
.prose ol li{list-style:decimal;margin:.45em 0}
.prose li::marker{color:var(--primary)}
.prose blockquote{
  margin:1.6em 0;padding:16px 20px;border-left:3px solid var(--primary);
  background:rgba(47,216,198,.05);border-radius:0 12px 12px 0;color:var(--text);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:12px;margin:1.5em 0;width:100%}
.prose figure{margin:1.6em 0}
.prose figure img{margin:0}
.prose figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}
.prose code{
  background:rgba(255,255,255,.07);color:var(--primary-hover);
  padding:2px 6px;border-radius:6px;font-size:.92em;
}
.prose pre{
  background:#050912;border:1px solid var(--border);border-radius:var(--r-lg);
  padding:16px 18px;overflow-x:auto;margin:1.6em 0;font-size:14px;line-height:1.7;
}
.prose pre code{background:none;padding:0;color:var(--text-2)}
.prose table{
  display:block;width:100%;overflow-x:auto;border-collapse:collapse;
  background:#050912;border:1px solid var(--border);border-radius:var(--r-lg);
  font-size:14px;margin:1.6em 0;
}
.prose table th,.prose table td{padding:11px 14px;border-bottom:1px solid var(--divider);text-align:left;white-space:nowrap}
.prose table th{color:var(--text);background:rgba(255,255,255,.03);font-weight:600}
.prose hr{border:0;border-top:1px solid var(--divider);margin:2.2em 0}
.article-empty{
  text-align:center;padding:56px 24px;border:1px dashed var(--border);border-radius:var(--r-xl);
  background:rgba(255,255,255,.02);
}
.article-empty h2{font-size:22px;margin-bottom:12px}
.article-empty p{color:var(--text-3);margin-bottom:22px}

/* ---------- tags ---------- */
.tag-block{margin-top:34px;padding-top:24px;border-top:1px solid var(--divider)}
.tag-block .block-label{font-size:13px;color:var(--text-3);letter-spacing:.06em;margin-bottom:12px;display:block}
.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:var(--r-pill);
  font-size:13px;color:var(--text-2);background:rgba(255,255,255,.04);border:1px solid var(--border);
  transition:border-color .18s ease,color .18s ease;
}
.tag:hover{border-color:var(--primary);color:var(--primary)}

/* ---------- aside ---------- */
.article-aside{display:flex;flex-direction:column;gap:20px}
.aside-card{
  background:var(--bg-2);border:1px solid var(--border);border-radius:var(--r-lg);
  padding:22px 20px;box-shadow:var(--sh-card);
}
.aside-title{font-size:16px;margin-bottom:14px}
.aside-meta li{
  display:flex;justify-content:space-between;gap:12px;
  padding:10px 0;border-bottom:1px solid var(--divider);font-size:13.5px;
}
.aside-meta li:last-child{border-bottom:0}
.aside-meta span{color:var(--text-3)}
.aside-meta strong{color:var(--text);font-weight:600;text-align:right}
.aside-links li{border-bottom:1px solid var(--divider)}
.aside-links li:last-child{border-bottom:0}
.aside-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 0;font-size:14.5px;color:var(--text-2);
}
.aside-links a:hover{color:var(--primary)}
.aside-links a svg{transition:transform .18s ease;opacity:.6}
.aside-links a:hover svg{transform:translateX(3px);opacity:1}
.aside-cta p{font-size:13.5px;color:var(--text-3);margin-bottom:16px}
.aside-cta .btn-primary-glow{width:100%}

/* ---------- related ---------- */
.section{padding-top:64px}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px}
.section-head h2{font-size:clamp(22px,2.4vw,30px)}
.section-head p{font-size:14.5px;color:var(--text-3);margin-top:8px}
.card-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.content-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--bg-2);border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--sh-card);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.content-card:hover{transform:translateY(-2px);border-color:rgba(47,216,198,.4);box-shadow:var(--sh-pop)}
.content-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-3)}
.content-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .18s ease}
.content-card:hover .thumb img{transform:scale(1.03)}
.content-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.content-card h3{font-size:17.5px;line-height:1.45}
.content-card p{font-size:14px;color:var(--text-3);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.content-card .foot{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--divider);
  display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);
}
.content-card .foot .go{display:inline-flex;align-items:center;gap:6px;color:var(--primary)}
.content-card .foot .go svg{transition:transform .18s ease}
.content-card:hover .foot .go svg{transform:translateX(3px)}

/* ---------- back links / cta ---------- */
.back-links{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.cta-band{
  margin-top:56px;border-radius:var(--r-xl);border:1px solid var(--glass-border);
  background:linear-gradient(120deg,rgba(47,216,198,.12),rgba(242,169,59,.06) 62%,rgba(255,255,255,.02));
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  padding:34px 28px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
}
.cta-band h2{font-size:clamp(20px,2.1vw,26px);margin-bottom:8px}
.cta-band p{font-size:14.5px;color:var(--text-2);max-width:620px}
.cta-band .actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{
  margin-top:0;background:#050A14;border-top:1px solid var(--border);
  padding:56px 0 26px;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:34px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--text-3);max-width:420px}
.footer-col h4{font-size:15px;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--primary)}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--text-2)}
.footer-contact li span:first-child{color:var(--text-3);flex:0 0 auto}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--divider);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.to-top{
  position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;
  display:grid;place-items:center;cursor:pointer;z-index:1040;
  background:rgba(255,255,255,.06);border:1px solid var(--glass-border);color:var(--text);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,border-color .2s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{border-color:var(--primary);color:var(--primary)}
@media (max-width:767px){
  .page-main{padding:40px 0 64px}
  .section{padding-top:48px}
  .article-title{font-size:26px}
  .cta-band{padding:26px 20px}
  .to-top{right:14px;bottom:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .content-card:hover{transform:none}
}

/* roulang page: category2 */
:root{
  --bs-primary:#2FD8C6;
  --bs-body-bg:#070C18;
  --bs-body-color:#E8F2F6;
  --bs-border-color:rgba(255,255,255,.08);
  --kai-black:#070C18;
  --kai-layer:#0C1424;
  --kai-deep:#0A1120;
  --kai-cyan:#2FD8C6;
  --kai-cyan-hover:#5CEBDB;
  --kai-cyan-press:#1FA89B;
  --kai-amber:#F2A93B;
  --kai-danger:#FF6B6B;
  --kai-text:#E8F2F6;
  --kai-text-2:#A7B6C4;
  --kai-text-3:#6C7C8C;
  --kai-line:rgba(255,255,255,.08);
  --kai-line-soft:rgba(255,255,255,.06);
  --kai-glass:rgba(255,255,255,.04);
  --kai-glass-line:rgba(47,216,198,.14);
  --kai-glow:0 0 0 1px rgba(47,216,198,.35),0 8px 30px -8px rgba(47,216,198,.45);
  --kai-shadow-card:0 12px 32px -20px rgba(0,0,0,.8);
  --kai-shadow-float:0 24px 60px -24px rgba(0,0,0,.9);
  --kai-r-lg:20px;
  --kai-r-md:14px;
  --kai-r-sm:10px;
  --kai-r-pill:999px;
  --kai-font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--kai-font);
  font-size:16px;
  line-height:1.75;
  color:var(--kai-text);
  background:var(--kai-black);
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:64px 64px;
}
img{max-width:100%;display:block;border-radius:var(--kai-r-md)}
a{color:var(--kai-cyan);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--kai-cyan-hover)}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--kai-text);line-height:1.28}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--kai-cyan);outline-offset:2px;border-radius:4px}
.container-xxl{max-width:1240px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.num{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1030;
  height:64px;
  display:flex;
  align-items:center;
  background:rgba(7,12,24,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--kai-line-soft);
  transition:height .22s ease,background .22s ease;
}
.site-header.is-scrolled{height:56px;background:rgba(7,12,24,.92)}
.header-inner{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 24px;
  display:flex;
  align-items:center;
  gap:20px;
}
.brand-block{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;
  display:grid;place-items:center;
  border-radius:var(--kai-r-sm);
  background:var(--kai-glass);
  border:1px solid var(--kai-glass-line);
  box-shadow:0 0 0 1px rgba(47,216,198,.1),0 6px 18px -10px rgba(47,216,198,.55);
}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-main{font-size:17px;font-weight:700;letter-spacing:.02em;color:var(--kai-text)}
.brand-sub{font-size:11px;color:var(--kai-text-2);letter-spacing:.14em}
.nav-channels{display:flex;align-items:center;gap:4px;margin-left:6px}
.nav-channels .nav-link{
  position:relative;
  padding:8px 12px;
  font-size:14.5px;
  color:var(--kai-text-2);
  border-radius:var(--kai-r-sm);
  white-space:nowrap;
}
.nav-channels .nav-link:hover{color:var(--kai-text);background:rgba(255,255,255,.045)}
.nav-channels .nav-link.active{color:var(--kai-text)}
.nav-channels .nav-link.active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:1px;
  height:2px;
  border-radius:2px;
  background:var(--kai-cyan);
  box-shadow:0 0 10px rgba(47,216,198,.9);
}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search input{
  width:190px;height:40px;
  padding:0 14px 0 38px;
  font-size:14px;
  color:var(--kai-text);
  background:rgba(255,255,255,.035);
  border:1px solid var(--kai-line);
  border-radius:var(--kai-r-pill);
  transition:border-color .18s ease,box-shadow .18s ease,width .22s ease;
}
.nav-search input::placeholder{color:var(--kai-text-3)}
.nav-search input:focus{
  width:230px;
  border-color:rgba(47,216,198,.55);
  box-shadow:0 0 0 3px rgba(47,216,198,.14);
  outline:none;
}
.nav-search i{position:absolute;left:14px;color:var(--kai-text-3);font-size:15px}
.icon-btn{
  width:40px;height:40px;
  display:grid;place-items:center;
  background:rgba(255,255,255,.04);
  border:1px solid var(--kai-line);
  border-radius:var(--kai-r-sm);
  color:var(--kai-text-2);
  cursor:pointer;
  transition:all .18s ease;
}
.icon-btn:hover{color:var(--kai-text);border-color:rgba(47,216,198,.4)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:40px;padding:0 16px;
  font-size:14px;
  color:var(--kai-text);
  background:transparent;
  border:1px solid var(--kai-line);
  border-radius:var(--kai-r-sm);
  transition:all .18s ease;
}
.btn-ghost:hover{color:var(--kai-text);background:rgba(47,216,198,.08);border-color:rgba(47,216,198,.45)}
.btn-primary-glow{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  min-height:40px;padding:0 18px;
  font-size:14px;font-weight:600;
  color:#04211E;
  background:var(--kai-cyan);
  border:1px solid transparent;
  border-radius:var(--kai-r-sm);
  box-shadow:var(--kai-glow);
  transition:transform .18s ease,background .18s ease,box-shadow .18s ease;
}
.btn-primary-glow:hover{background:var(--kai-cyan-hover);color:#04211E;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(47,216,198,.5),0 12px 34px -8px rgba(47,216,198,.6)}
.btn-primary-glow:active{background:var(--kai-cyan-press);transform:translateY(0)}
.btn-outline-cyan{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  min-height:46px;padding:0 22px;
  font-size:15px;font-weight:600;
  color:var(--kai-text);
  background:transparent;
  border:1px solid rgba(47,216,198,.45);
  border-radius:var(--kai-r-sm);
  transition:all .18s ease;
}
.btn-outline-cyan:hover{background:rgba(47,216,198,.1);color:var(--kai-text);border-color:var(--kai-cyan)}
.btn-text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;
  color:var(--kai-cyan);
  border-bottom:1px solid rgba(47,216,198,.4);
  padding-bottom:2px;
}
.btn-text-link i{transition:transform .18s ease}
.btn-text-link:hover i{transform:translateX(3px)}

/* ---------- offcanvas ---------- */
.offcanvas.kai-drawer{
  background:var(--kai-layer);
  color:var(--kai-text);
  width:300px;
  border-left:1px solid var(--kai-line);
}
.kai-drawer .offcanvas-header{border-bottom:1px solid var(--kai-line-soft);padding:18px 20px}
.kai-drawer .offcanvas-body{padding:20px}
.kai-drawer .drawer-link{
  display:block;
  padding:12px 14px;
  margin-bottom:6px;
  font-size:15px;
  color:var(--kai-text-2);
  border-radius:var(--kai-r-sm);
  border:1px solid transparent;
}
.kai-drawer .drawer-link.active,
.kai-drawer .drawer-link:hover{color:var(--kai-text);background:rgba(255,255,255,.045);border-color:var(--kai-glass-line)}
.kai-drawer .drawer-search{position:relative;margin-bottom:16px}
.kai-drawer .drawer-search input{
  width:100%;height:44px;
  padding:0 14px 0 38px;
  color:var(--kai-text);
  background:rgba(255,255,255,.035);
  border:1px solid var(--kai-line);
  border-radius:var(--kai-r-pill);
  font-size:14px;
}
.kai-drawer .drawer-search i{position:absolute;left:14px;top:13px;color:var(--kai-text-3)}
.btn-close-kai{background:none;border:0;color:var(--kai-text-2);font-size:20px;line-height:1}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;
  margin-top:64px;
  padding:74px 0 62px;
  background:
    linear-gradient(180deg,rgba(7,12,24,.82),rgba(7,12,24,.96)),
    url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  border-bottom:1px solid var(--kai-line-soft);
  overflow:hidden;
}
.cat-hero::after{
  content:"";
  position:absolute;inset:0;
  background:radial-gradient(720px 260px at 14% 8%,rgba(47,216,198,.14),transparent 70%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:2}
.breadcrumb-kai{
  display:flex;align-items:center;gap:8px;
  font-size:13px;
  color:var(--kai-text-3);
  margin-bottom:20px;
}
.breadcrumb-kai a{color:var(--kai-text-2)}
.breadcrumb-kai a:hover{color:var(--kai-cyan)}
.breadcrumb-kai .sep{color:var(--kai-text-3);opacity:.6}
.breadcrumb-kai .current{color:var(--kai-text)}
.cat-hero h1{
  font-size:clamp(30px,4.4vw,46px);
  max-width:20ch;
  margin-bottom:18px;
}
.cat-hero h1 .hl{color:var(--kai-cyan)}
.hero-lead{
  max-width:62ch;
  font-size:16.5px;
  color:var(--kai-text-2);
  padding-left:16px;
  border-left:2px solid rgba(47,216,198,.6);
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag-pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;
  font-size:13px;
  color:var(--kai-text-2);
  background:rgba(47,216,198,.07);
  border:1px solid var(--kai-glass-line);
  border-radius:var(--kai-r-pill);
}
.tag-pill i{color:var(--kai-cyan);font-size:13px}

/* ---------- sections ---------- */
.section{padding:86px 0;position:relative;z-index:1}
.section.alt{background:var(--kai-deep)}
.section-head{margin-bottom:42px;max-width:70ch}
.section-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;letter-spacing:.16em;
  color:var(--kai-cyan);
  text-transform:uppercase;
  margin-bottom:14px;
}
.section-head h2{font-size:clamp(24px,2.6vw,34px);margin-bottom:14px}
.section-head p{color:var(--kai-text-2);font-size:15.5px}

/* stat strip */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--kai-line-soft);
  border:1px solid var(--kai-glass-line);
  border-radius:var(--kai-r-lg);
  overflow:hidden;
  background-color:var(--kai-glass);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.stat-cell{background:rgba(10,17,32,.72);padding:24px 22px}
.stat-cell .stat-num{font-size:26px;font-weight:700;color:var(--kai-cyan);letter-spacing:-.01em}
.stat-cell .stat-num.amber{color:var(--kai-amber)}
.stat-cell .stat-label{font-size:13.5px;color:var(--kai-text-3);margin-top:6px;line-height:1.6}

/* timeline */
.timeline{position:relative;margin-top:8px}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:96px minmax(0,1fr);
  gap:26px;
  padding-bottom:44px;
}
.tl-item:last-child{padding-bottom:0}
.tl-rail{position:relative;display:flex;flex-direction:column;align-items:center}
.tl-index{
  width:60px;height:60px;
  display:grid;place-items:center;
  font-size:19px;font-weight:700;
  color:var(--kai-cyan);
  background:var(--kai-layer);
  border:1px solid rgba(47,216,198,.4);
  border-radius:var(--kai-r-md);
  box-shadow:0 0 0 1px rgba(47,216,198,.12),0 10px 28px -16px rgba(47,216,198,.6);
}
.tl-line{
  flex:1;
  width:1px;
  margin-top:14px;
  background:linear-gradient(180deg,rgba(47,216,198,.5),rgba(255,255,255,.05));
}
.tl-item:last-child .tl-line{display:none}
.tl-body{
  background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.012));
  border:1px solid var(--kai-line);
  border-radius:var(--kai-r-lg);
  padding:26px 28px;
  box-shadow:var(--kai-shadow-card);
  transition:border-color .2s ease,transform .2s ease;
}
.tl-body:hover{border-color:var(--kai-glass-line);transform:translateY(-2px)}
.tl-head{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:10px}
.tl-head h3{font-size:21px}
.tl-owner{
  font-size:12.5px;
  color:var(--kai-amber);
  padding:4px 12px;
  border:1px solid rgba(242,169,59,.35);
  background:rgba(242,169,59,.08);
  border-radius:var(--kai-r-pill);
}
.tl-body > p{color:var(--kai-text-2);font-size:15px;margin-bottom:16px;max-width:66ch}
.tl-points{display:grid;gap:9px}
.tl-points li{position:relative;padding-left:22px;font-size:14.6px;color:var(--kai-text-2)}
.tl-points li::before{
  content:"";
  position:absolute;left:2px;top:10px;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--kai-cyan);
  transform:rotate(45deg);
  opacity:.85;
}

/* audience cards */
.aud-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:24px}
.aud-card{
  background:var(--kai-layer);
  border:1px solid var(--kai-line);
  border-radius:var(--kai-r-lg);
  padding:30px;
  box-shadow:var(--kai-shadow-card);
  transition:border-color .2s ease,transform .2s ease;
  display:flex;flex-direction:column;gap:14px;
}
.aud-card:hover{border-color:var(--kai-glass-line);transform:translateY(-2px)}
.aud-card.wide{
  background:
    linear-gradient(140deg,rgba(47,216,198,.09),transparent 62%),
    var(--kai-layer);
}
.aud-card h3{font-size:20px}
.aud-card p{color:var(--kai-text-2);font-size:15px}
.aud-card .aud-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:auto;padding-top:10px}
.aud-stack{display:grid;gap:24px}

/* faq */
.faq-wrap{max-width:920px}
.faq-list{border-top:1px solid var(--kai-line-soft)}
.faq-item{border-bottom:1px solid var(--kai-line-soft)}
.faq-q{
  width:100%;
  display:flex;align-items:center;gap:16px;
  padding:22px 4px;
  background:none;border:0;
  text-align:left;
  color:var(--kai-text);
  font-size:16.5px;font-weight:600;
  cursor:pointer;
}
.faq-q .idx{font-size:13px;color:var(--kai-cyan);min-width:26px;font-weight:700}
.faq-q .plus{margin-left:auto;color:var(--kai-cyan);font-size:20px;transition:transform .18s ease}
.faq-q[aria-expanded="true"] .plus{transform:rotate(45deg)}
.faq-a{padding:0 4px 22px 42px;color:var(--kai-text-2);font-size:15px;max-width:68ch;display:none}
.faq-a.open{display:block}

/* cta band */
.cta-band{
  border-top:1px solid var(--kai-glass-line);
  border-bottom:1px solid var(--kai-glass-line);
  background:
    radial-gradient(600px 200px at 80% 20%,rgba(47,216,198,.13),transparent 70%),
    var(--kai-layer);
  padding:54px 0;
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;gap:26px;justify-content:space-between}
.cta-inner h2{font-size:clamp(22px,2.2vw,30px);margin-bottom:10px}
.cta-inner p{color:var(--kai-text-2);font-size:15px;max-width:56ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* footer */
.site-footer{
  background:#050912;
  border-top:1px solid var(--kai-line);
  padding:64px 0 26px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:40px;
  border-bottom:1px solid var(--kai-line-soft);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-desc{color:var(--kai-text-3);font-size:14px;max-width:34ch;line-height:1.8}
.footer-col h4{font-size:14px;color:var(--kai-text);margin-bottom:16px;letter-spacing:.04em}
.footer-col ul{display:grid;gap:11px}
.footer-col a{color:var(--kai-text-3);font-size:14px}
.footer-col a:hover{color:var(--kai-cyan)}
.footer-contact li{display:flex;gap:10px;font-size:14px;color:var(--kai-text-3)}
.footer-contact li span:first-child{color:var(--kai-text-2);min-width:72px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  padding-top:22px;
  font-size:13px;color:var(--kai-text-3);
}
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:1040;
  width:44px;height:44px;
  display:grid;place-items:center;
  color:var(--kai-text);
  background:rgba(255,255,255,.06);
  border:1px solid var(--kai-line);
  border-radius:var(--kai-r-pill);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--kai-shadow-float);
  opacity:0;visibility:hidden;
  transition:opacity .2s ease,visibility .2s ease,border-color .2s ease;
  cursor:pointer;
}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{border-color:rgba(47,216,198,.5);color:var(--kai-cyan)}

@media (max-width:1199px){
  .nav-search input{width:150px}
  .nav-search input:focus{width:180px}
}
@media (max-width:991px){
  .section{padding:64px 0}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .aud-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cat-hero{padding:56px 0 48px}
}
@media (max-width:767px){
  .container-xxl{padding:0 18px}
  .header-inner{padding:0 18px;gap:12px}
  .tl-item{grid-template-columns:1fr;gap:14px;padding-bottom:34px}
  .tl-rail{flex-direction:row;align-items:center;gap:14px}
  .tl-index{width:52px;height:52px;font-size:17px}
  .tl-line{flex:1;width:auto;height:1px;margin-top:0}
  .tl-body{padding:22px 20px}
  .cat-hero h1{max-width:none}
  .hero-lead{padding-left:14px}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .faq-a{padding-left:4px}
}
@media (max-width:520px){
  .stat-strip{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .section{padding:52px 0}
  .footer-bottom{flex-direction:column;gap:6px}
  .btn-outline-cyan,.btn-primary-glow{width:100%}
  .cta-actions{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --bg:#070C18;
  --bg-2:#0C1424;
  --bg-3:#0A1120;
  --brand:#2FD8C6;
  --brand-hover:#5CEBDB;
  --brand-pressed:#1FA89B;
  --amber:#F2A93B;
  --danger:#FF6B6B;
  --text:#E8F2F6;
  --text-2:#A7B6C4;
  --text-3:#6C7C8C;
  --border:rgba(255,255,255,.08);
  --line:rgba(255,255,255,.06);
  --glass:rgba(255,255,255,.04);
  --glass-border:rgba(47,216,198,.14);
  --r-lg:20px;
  --r-md:14px;
  --r-sm:10px;
  --r-pill:999px;
  --shadow-card:0 12px 32px -20px rgba(0,0,0,.8);
  --shadow-float:0 24px 60px -24px rgba(0,0,0,.9);
  --glow:0 0 0 1px rgba(47,216,198,.35),0 8px 30px -8px rgba(47,216,198,.45);
  --bs-primary:#2FD8C6;
  --bs-body-bg:#070C18;
  --bs-body-color:#E8F2F6;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-link-color:#2FD8C6;
  --bs-link-hover-color:#5CEBDB;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  letter-spacing:-0.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-hover);}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,h5{margin:0;font-weight:600;letter-spacing:-0.01em;color:var(--text);}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
svg{flex:none;}
::selection{background:rgba(47,216,198,.28);color:#fff;}
.container-xxl{
  width:100%;
  max-width:1240px;
  margin-inline:auto;
  padding-inline:24px;
}
@media (min-width:1400px){.container-xxl{max-width:1280px;}}
@media (max-width:575.98px){.container-xxl{padding-inline:18px;}}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 20px;
  border-radius:var(--r-sm);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease,color .18s ease;
}
.btn:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible,
.accordion-button:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
}
.btn-primary,
.btn-glow{
  background:var(--brand);
  color:#04181A;
  box-shadow:var(--glow);
}
.btn-primary:hover,
.btn-glow:hover{
  background:var(--brand-hover);
  color:#04181A;
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(92,235,219,.5),0 14px 34px -10px rgba(47,216,198,.6);
}
.btn-primary:active,
.btn-glow:active{
  background:var(--brand-pressed);
  transform:translateY(0);
  box-shadow:0 0 0 1px rgba(31,168,155,.5),0 4px 14px -6px rgba(47,216,198,.5);
}
.btn-line{
  background:transparent;
  border-color:rgba(47,216,198,.4);
  color:var(--text);
}
.btn-line:hover{
  background:rgba(47,216,198,.08);
  border-color:var(--brand);
  color:var(--brand-hover);
  transform:translateY(-1px);
}
.btn-line:active{transform:translateY(0);background:rgba(47,216,198,.14);}
.btn-ghost{
  background:transparent;
  border-color:var(--border);
  color:var(--text-2);
  min-height:40px;
  font-weight:500;
}
.btn-ghost:hover{color:var(--text);border-color:rgba(255,255,255,.2);background:rgba(255,255,255,.04);}
.btn[disabled],.btn.is-disabled{opacity:.55;filter:saturate(40%);pointer-events:none;}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand);
  border-bottom:1px solid rgba(47,216,198,.35);
  padding-bottom:2px;
  text-underline-offset:4px;
}
.link-more svg{transition:transform .18s ease;}
.link-more:hover{color:var(--brand-hover);border-bottom-color:var(--brand-hover);}
.link-more:hover svg{transform:translateX(3px);}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:1040;
  background:rgba(7,12,24,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:height .2s ease,background-color .2s ease,border-color .2s ease;
}
.site-header .header-inner{
  display:flex;
  align-items:center;
  gap:20px;
  height:64px;
  transition:height .2s ease;
}
.site-header.is-scrolled{background:rgba(7,12,24,.88);border-bottom-color:var(--border);}
.site-header.is-scrolled .header-inner{height:56px;}
.brand{display:flex;align-items:center;gap:10px;flex:none;color:var(--text);}
.brand:hover{color:var(--text);}
.brand-mark{
  width:38px;height:38px;
  display:grid;place-items:center;
  border-radius:12px;
  background:linear-gradient(150deg,rgba(47,216,198,.16),rgba(47,216,198,.02));
  border:1px solid rgba(47,216,198,.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.05;}
.brand-main{font-size:17px;font-weight:700;letter-spacing:.02em;color:var(--text);}
.brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.12em;}
.nav-channels{display:flex;align-items:center;gap:4px;margin-inline:auto;}
.nav-channels .nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  height:38px;
  padding:0 14px;
  border-radius:var(--r-sm);
  color:var(--text-2);
  font-size:14.5px;
  font-weight:500;
  transition:color .18s ease,background-color .18s ease;
}
.nav-channels .nav-link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-channels .nav-link.active{color:var(--text);}
.nav-channels .nav-link.active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;
  background:var(--brand);
  box-shadow:0 0 12px rgba(47,216,198,.9);
}
.header-actions{display:flex;align-items:center;gap:10px;flex:none;}
.nav-search{
  position:relative;
  display:flex;
  align-items:center;
  height:40px;
  width:196px;
  padding-inline:12px 14px;
  border-radius:var(--r-pill);
  background:var(--glass);
  border:1px solid var(--border);
  transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.nav-search:focus-within{
  border-color:rgba(47,216,198,.55);
  box-shadow:0 0 0 3px rgba(47,216,198,.14);
  background:rgba(255,255,255,.06);
}
.nav-search svg{color:var(--text-3);}
.nav-search input{
  width:100%;
  border:0;
  background:transparent;
  outline:none;
  font-size:13.5px;
  color:var(--text);
  padding-left:8px;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-toggle{
  width:44px;height:44px;
  display:grid;place-items:center;
  border-radius:var(--r-sm);
  background:var(--glass);
  border:1px solid var(--border);
  color:var(--text-2);
}
.nav-toggle:hover{color:var(--text);border-color:rgba(255,255,255,.2);}
.mobile-nav{
  background:var(--bg-2)!important;
  border-left:1px solid var(--border);
  color:var(--text);
  width:300px;
}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--border);}
.mobile-nav .offcanvas-title{font-size:15px;color:var(--text-2);font-weight:500;}
.mobile-nav .m-links{margin-top:8px;}
.mobile-nav .m-links a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:13px 2px;
  color:var(--text-2);
  font-size:15.5px;
  border-bottom:1px solid var(--line);
}
.mobile-nav .m-links a.active,
.mobile-nav .m-links a:hover{color:var(--brand);}
.mobile-nav .m-search{
  margin:16px 0 8px;
  display:flex;align-items:center;
  height:44px;padding-inline:14px;
  border-radius:var(--r-pill);
  background:var(--glass);
  border:1px solid var(--border);
}
.mobile-nav .m-search input{width:100%;border:0;background:transparent;outline:none;font-size:14px;padding-left:8px;}
.mobile-nav .m-actions{display:grid;gap:10px;margin-top:16px;}

/* ---------- 页面 Banner ---------- */
.page-hero{
  position:relative;
  padding:120px 0 56px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background:var(--bg-3);
}
.page-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center right;
  opacity:.26;
  filter:saturate(.9);
}
.page-hero .hero-veil{
  position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 12% 10%,rgba(47,216,198,.14),transparent 62%),
    linear-gradient(100deg,rgba(7,12,24,.96) 0%,rgba(7,12,24,.82) 46%,rgba(7,12,24,.62) 100%);
}
.page-hero .container-xxl{position:relative;z-index:2;}
.breadcrumb-custom{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  margin-bottom:22px;
}
.breadcrumb-custom li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumb-custom a{color:var(--text-3);}
.breadcrumb-custom a:hover{color:var(--brand);}
.breadcrumb-custom .sep{color:rgba(255,255,255,.2);}
.breadcrumb-custom .current{color:var(--text-2);}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:30px;
  padding:0 14px;
  border-radius:var(--r-pill);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--brand);
  background:rgba(47,216,198,.08);
  border:1px solid rgba(47,216,198,.24);
  margin-bottom:20px;
}
.hero-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand);}
.page-hero h1{
  font-size:clamp(28px,3.6vw,46px);
  line-height:1.24;
  font-weight:700;
  max-width:20ch;
}
.page-hero h1 .accent{color:var(--brand);}
.page-hero .hero-lead{
  margin-top:20px;
  max-width:62ch;
  font-size:16px;
  line-height:1.85;
  color:var(--text-2);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.hero-metrics{
  position:relative;
  margin-top:44px;
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:1px;
  background:var(--glass-border);
  border:1px solid var(--glass-border);
  border-radius:var(--r-md);
  overflow:hidden;
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.hero-metrics .metric{
  background:rgba(10,17,32,.72);
  padding:18px 20px;
}
.hero-metrics .metric b{
  display:block;
  font-size:clamp(20px,2vw,26px);
  font-weight:700;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  letter-spacing:0;
}
.hero-metrics .metric span{display:block;margin-top:6px;font-size:13px;color:var(--text-3);}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section--alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head .eyebrow{
  display:inline-block;
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--brand);
  margin-bottom:14px;
}
.section-head h2{
  font-size:clamp(23px,2.5vw,34px);
  line-height:1.3;
  font-weight:700;
}
.section-head p{margin-top:16px;color:var(--text-2);font-size:15.5px;line-height:1.85;}

/* ---------- 导语 ---------- */
.intro-grid{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:56px;
  align-items:start;
}
.intro-copy p{color:var(--text-2);font-size:16px;line-height:1.9;}
.intro-copy p + p{margin-top:16px;}
.intro-copy strong{color:var(--text);font-weight:600;}
.intro-side{
  background:var(--glass);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:26px;
  box-shadow:var(--shadow-card);
}
.intro-side h3{font-size:17px;margin-bottom:16px;}
.check-list li{
  display:flex;
  gap:12px;
  padding:11px 0;
  border-bottom:1px solid var(--line);
  font-size:14.5px;
  color:var(--text-2);
}
.check-list li:last-child{border-bottom:0;padding-bottom:0;}
.check-list svg{margin-top:4px;color:var(--brand);}

/* ---------- 场景双列交错 ---------- */
.scene-list{border-top:1px solid var(--line);}
.scene-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:52px;
  align-items:center;
  padding:52px 0;
  border-bottom:1px solid var(--line);
}
.scene-row--reverse .scene-media{order:2;}
.scene-media{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--border);
  box-shadow:var(--shadow-card);
  aspect-ratio:16/10;
  background:linear-gradient(140deg,#0B1526,#0A1120);
}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.scene-row:hover .scene-media img{transform:scale(1.03);}
.scene-media .scene-chip{
  position:absolute;
  left:14px;top:14px;
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 12px;
  border-radius:var(--r-pill);
  font-size:12.5px;
  color:var(--text);
  background:rgba(7,12,24,.72);
  border:1px solid rgba(47,216,198,.32);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.scene-body .scene-index{
  font-size:12.5px;
  letter-spacing:.16em;
  color:var(--amber);
  font-variant-numeric:tabular-nums;
}
.scene-body h3{font-size:clamp(20px,2vw,23px);margin:12px 0 16px;line-height:1.4;}
.scene-body dl{margin:0;}
.scene-body dt{
  font-size:13px;
  color:var(--brand);
  letter-spacing:.04em;
  margin-bottom:4px;
}
.scene-body dd{
  margin:0 0 16px;
  font-size:15px;
  color:var(--text-2);
  line-height:1.85;
}
.scene-body dd:last-of-type{margin-bottom:0;}
.scene-points{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;}
.tag{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 12px;
  border-radius:var(--r-pill);
  font-size:12.5px;
  color:var(--text-2);
  background:rgba(47,216,198,.08);
  border:1px solid rgba(47,216,198,.2);
}
.tag--amber{background:rgba(242,169,59,.1);border-color:rgba(242,169,59,.28);color:#F3C078;}

/* ---------- 岗位分工 ---------- */
.role-grid{
  display:grid;
  grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);
  gap:48px;
  align-items:start;
}
.role-visual{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--border);
  aspect-ratio:4/3;
  box-shadow:var(--shadow-card);
}
.role-visual img{width:100%;height:100%;object-fit:cover;}
.role-visual::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,12,24,.05),rgba(7,12,24,.72));
}
.role-visual .visual-caption{
  position:absolute;
  left:18px;right:18px;bottom:16px;
  z-index:2;
  font-size:13.5px;
  color:var(--text-2);
}
.role-list{border-top:1px solid var(--line);}
.role-item{
  display:grid;
  grid-template-columns:132px minmax(0,1fr);
  gap:24px;
  padding:22px 0;
  border-bottom:1px solid var(--line);
  align-items:baseline;
}
.role-item .role-name{
  font-size:15.5px;
  font-weight:600;
  color:var(--text);
}
.role-item .role-name span{display:block;margin-top:4px;font-size:12.5px;font-weight:400;color:var(--text-3);letter-spacing:.02em;}
.role-item p{font-size:15px;color:var(--text-2);line-height:1.85;}

/* ---------- 上线节奏 ---------- */
.step-rail{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
  counter-reset:step;
}
.step-card{
  position:relative;
  padding:26px 22px 24px;
  border-radius:var(--r-md);
  background:var(--bg-3);
  border:1px solid var(--border);
  transition:border-color .2s ease,transform .2s ease;
}
.step-card:hover{border-color:rgba(47,216,198,.35);transform:translateY(-2px);}
.step-card::before{
  counter-increment:step;
  content:"0" counter(step);
  display:block;
  font-size:13px;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  letter-spacing:.12em;
  margin-bottom:14px;
}
.step-card h3{font-size:17px;margin-bottom:10px;}
.step-card p{font-size:14px;color:var(--text-2);line-height:1.8;}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;}
.accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line);
}
.accordion-item:first-child{border-top:1px solid var(--line);}
.accordion-button{
  background:transparent;
  color:var(--text);
  font-size:16.5px;
  font-weight:600;
  padding:22px 44px 22px 0;
  box-shadow:none!important;
  display:flex;
  align-items:center;
  gap:14px;
  border-radius:0;
}
.accordion-button:not(.collapsed){color:var(--brand);}
.accordion-button::after{display:none;}
.accordion-button .faq-no{
  font-size:13px;
  color:var(--text-3);
  font-variant-numeric:tabular-nums;
  min-width:26px;
}
.accordion-button .faq-plus{
  position:absolute;
  right:6px;
  top:50%;
  transform:translateY(-50%);
  width:22px;height:22px;
  display:grid;place-items:center;
  color:var(--text-3);
  transition:transform .18s ease,color .18s ease;
}
.accordion-button:not(.collapsed) .faq-plus{transform:translateY(-50%) rotate(45deg);color:var(--brand);}
.accordion-button:hover{color:var(--brand-hover);}
.accordion-body{
  padding:0 44px 26px 40px;
  color:var(--text-2);
  font-size:15px;
  line-height:1.9;
  max-width:68ch;
}

/* ---------- CTA 条 ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--glass-border);
  background:
    linear-gradient(120deg,rgba(47,216,198,.12),rgba(10,17,32,.9) 58%),
    var(--bg-3);
  padding:44px 44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  box-shadow:var(--shadow-float);
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:66px 66px;
  opacity:.5;
  pointer-events:none;
}
.cta-band > *{position:relative;z-index:2;}
.cta-band h2{font-size:clamp(22px,2.3vw,30px);line-height:1.35;}
.cta-band p{margin-top:12px;color:var(--text-2);font-size:15px;max-width:56ch;}
.cta-band .cta-actions{display:flex;gap:12px;flex-wrap:wrap;flex:none;}

/* ---------- 面包屑下返回点 ---------- */
.back-links{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:36px;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:#050A14;
  border-top:1px solid var(--border);
  padding:64px 0 28px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));
  gap:40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;}
.footer-brand .brand-mark{
  width:36px;height:36px;
  border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(150deg,rgba(47,216,198,.16),rgba(47,216,198,.02));
  border:1px solid rgba(47,216,198,.22);
}
.footer-brand .brand-text{display:flex;flex-direction:column;line-height:1.05;}
.footer-brand .brand-main{font-size:16px;font-weight:700;color:var(--text);}
.footer-brand .brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.12em;}
.footer-desc{margin-top:18px;font-size:13.5px;color:var(--text-3);line-height:1.85;max-width:38ch;}
.footer-col h4{
  font-size:13px;
  font-weight:600;
  color:var(--text-2);
  letter-spacing:.06em;
  margin-bottom:16px;
}
.footer-col ul li{margin-bottom:11px;}
.footer-col ul a{font-size:13.5px;color:var(--text-3);}
.footer-col ul a:hover{color:var(--brand);}
.footer-contact li{
  display:flex;
  gap:8px;
  font-size:13.5px;
  color:var(--text-3);
  margin-bottom:11px;
}
.footer-bottom{
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  font-size:12.5px;
  color:var(--text-3);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;
  right:22px;
  bottom:26px;
  z-index:1030;
  width:46px;height:46px;
  display:grid;place-items:center;
  border-radius:50%;
  background:rgba(255,255,255,.05);
  border:1px solid var(--border);
  color:var(--text-2);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,color .2s ease,border-color .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{color:var(--brand);border-color:rgba(47,216,198,.45);}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .nav-channels{margin-inline:12px;}
  .nav-channels .nav-link{padding:0 10px;font-size:14px;}
  .nav-search{width:168px;}
}
@media (max-width:991.98px){
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .page-hero{padding:104px 0 44px;}
  .intro-grid{grid-template-columns:1fr;gap:32px;}
  .scene-row{grid-template-columns:1fr;gap:26px;padding:40px 0;}
  .scene-row--reverse .scene-media{order:0;}
  .role-grid{grid-template-columns:1fr;gap:32px;}
  .step-rail{grid-template-columns:repeat(2,minmax(0,1fr));}
  .hero-metrics{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{flex-direction:column;align-items:flex-start;padding:34px 30px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:767.98px){
  .hero-metrics{grid-template-columns:repeat(2,minmax(0,1fr));}
  .role-item{grid-template-columns:1fr;gap:8px;}
  .accordion-button{font-size:15.5px;padding-right:38px;}
  .accordion-body{padding:0 20px 22px 32px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:575.98px){
  .section{padding:56px 0;}
  .page-hero h1{max-width:none;}
  .hero-actions .btn{width:100%;}
  .step-rail{grid-template-columns:1fr;}
  .hero-metrics{grid-template-columns:1fr;}
  .cta-band{padding:26px 20px;}
  .cta-band .cta-actions{width:100%;}
  .cta-band .cta-actions .btn{width:100%;}
  .to-top{right:14px;bottom:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
  .btn:hover,.step-card:hover,.link-more:hover svg{transform:none!important;}
  .scene-row:hover .scene-media img{transform:none!important;}
}

/* roulang page: category4 */
:root{
  --bg:#070C18;
  --bg-2:#0C1424;
  --bg-3:#0A1120;
  --primary:#2FD8C6;
  --primary-hover:#5CEBDB;
  --primary-pressed:#1FA89B;
  --accent:#F2A93B;
  --danger:#FF6B6B;
  --text:#E8F2F6;
  --text-2:#A7B6C4;
  --text-3:#6C7C8C;
  --border:rgba(255,255,255,.08);
  --divider:rgba(255,255,255,.06);
  --glass:rgba(255,255,255,.04);
  --glass-border:rgba(47,216,198,.14);
  --r-xl:24px;
  --r-lg:20px;
  --r-md:14px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow-card:0 12px 32px -20px rgba(0,0,0,.8);
  --shadow-float:0 24px 60px -24px rgba(0,0,0,.9);
  --glow:0 0 0 1px rgba(47,216,198,.35),0 8px 30px -8px rgba(47,216,198,.45);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --bs-primary:#2FD8C6;
  --bs-body-bg:#070C18;
  --bs-body-color:#E8F2F6;
  --bs-border-color:rgba(255,255,255,.08);
  --bs-link-color:#2FD8C6;
  --bs-link-hover-color:#5CEBDB;
  --bs-font-sans-serif:var(--font);
  --bs-body-font-family:var(--font);
  --bs-accordion-bg:transparent;
  --bs-accordion-color:#E8F2F6;
  --bs-accordion-border-color:transparent;
  --bs-accordion-btn-color:#E8F2F6;
  --bs-accordion-active-color:#5CEBDB;
  --bs-accordion-active-bg:transparent;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  letter-spacing:-0.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(47,216,198,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(47,216,198,.05) 1px,transparent 1px);
  background-size:72px 72px;
  opacity:.5;
}
main{position:relative;z-index:1;}
img{max-width:100%;display:block;}
a{color:var(--primary);text-decoration:none;}
a:hover{color:var(--primary-hover);}
p{margin:0 0 1.1em;}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-0.01em;color:var(--text);}
ul,ol{margin:0;}
button{font-family:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px;}
.container-xxl{max-width:1200px;padding-left:24px;padding-right:24px;margin-left:auto;margin-right:auto;width:100%;}
@media (min-width:1400px){.container-xxl{max-width:1280px;}}
.num{font-variant-numeric:tabular-nums;}

/* ============ 按钮体系 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:44px;
  padding:0 22px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1;
  cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:focus{box-shadow:none;}
.btn-glow{background:var(--primary);color:#04121A;box-shadow:var(--glow);}
.btn-glow:hover{background:var(--primary-hover);color:#04121A;transform:translateY(-1px);box-shadow:0 0 0 1px rgba(47,216,198,.5),0 14px 36px -8px rgba(47,216,198,.55);}
.btn-glow:active{background:var(--primary-pressed);transform:translateY(0);box-shadow:0 0 0 1px rgba(47,216,198,.35);}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--text);}
.btn-ghost:hover{border-color:rgba(47,216,198,.5);color:var(--primary-hover);background:rgba(47,216,198,.08);}
.btn-amber{background:rgba(242,169,59,.12);border-color:rgba(242,169,59,.45);color:var(--accent);}
.btn-amber:hover{background:rgba(242,169,59,.2);color:#FFC46A;border-color:rgba(242,169,59,.65);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.55;filter:saturate(.6);pointer-events:none;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--primary);
  font-size:14.5px;
  font-weight:600;
  text-decoration:underline;
  text-underline-offset:4px;
  text-decoration-color:rgba(47,216,198,.4);
}
.link-arrow svg{transition:transform .18s ease;}
.link-arrow:hover{color:var(--primary-hover);}
.link-arrow:hover svg{transform:translateX(3px);}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:1040;
  background:rgba(7,12,24,.76);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--divider);
  transition:background-color .2s ease,border-color .2s ease;
}
.site-header.is-scrolled{background:rgba(7,12,24,.92);border-bottom-color:var(--border);}
.header-inner{display:flex;align-items:center;gap:18px;height:64px;transition:height .2s ease;}
.site-header.is-scrolled .header-inner{height:56px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;min-height:44px;color:var(--text);}
.brand:hover{color:var(--text);}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:11px;
  background:linear-gradient(160deg,rgba(47,216,198,.2),rgba(47,216,198,.02));
  border:1px solid rgba(47,216,198,.24);
}
.brand-text{display:flex;flex-direction:column;line-height:1.05;}
.brand-main{font-size:17px;font-weight:700;letter-spacing:.02em;}
.brand-sub{font-size:10px;letter-spacing:.18em;color:var(--text-2);}
.nav-channels{display:flex;align-items:center;gap:2px;}
.nav-channels .nav-link{
  position:relative;
  padding:10px 14px;
  font-size:15px;
  color:var(--text-2);
  border-radius:8px;
  transition:color .18s ease,background-color .18s ease;
}
.nav-channels .nav-link:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-channels .nav-link.active{color:var(--text);font-weight:600;}
.nav-channels .nav-link.active::after{
  content:"";
  position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:var(--primary);
  box-shadow:0 0 10px rgba(47,216,198,.9);
}
.header-right{display:flex;align-items:center;gap:10px;margin-left:auto;}
.nav-search{position:relative;align-items:center;}
.nav-search svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:var(--text-3);pointer-events:none;}
.nav-search input{
  width:196px;height:40px;
  padding:0 16px 0 38px;
  border-radius:var(--r-pill);
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
  color:var(--text);
  font-size:14px;
  transition:border-color .18s ease,box-shadow .18s ease,background-color .18s ease;
}
.nav-search input::placeholder{color:var(--text-3);}
.nav-search input:focus{
  outline:none;
  border-color:rgba(47,216,198,.55);
  background:rgba(47,216,198,.05);
  box-shadow:0 0 0 3px rgba(47,216,198,.12);
}
.icon-btn{
  width:44px;height:44px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:var(--r-btn);
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
  color:var(--text-2);
  cursor:pointer;
  transition:color .18s ease,border-color .18s ease,background-color .18s ease;
}
.icon-btn:hover{color:var(--text);border-color:rgba(47,216,198,.4);background:rgba(47,216,198,.07);}
.mobile-nav{background:var(--bg-3);border-left:1px solid var(--border);color:var(--text);width:min(360px,86vw);}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--divider);padding:14px 20px;}
.mobile-nav .offcanvas-body{padding:20px;}
.mobile-channels{display:flex;flex-direction:column;margin:18px 0;}
.mobile-channels a{
  padding:14px 4px;
  color:var(--text-2);
  font-size:16px;
  border-bottom:1px solid var(--divider);
}
.mobile-channels a.active{color:var(--primary);font-weight:600;}
.mobile-channels a:hover{color:var(--text);}
.mobile-actions{display:flex;flex-direction:column;gap:12px;margin-top:8px;}
.nav-search-block{display:flex;width:100%;}
.nav-search-block input{width:100%;height:44px;}

/* ============ Hero ============ */
.cat-hero{
  position:relative;
  overflow:hidden;
  padding:32px 0 76px;
  border-bottom:1px solid var(--divider);
  background:
    linear-gradient(180deg,rgba(7,12,24,.82) 0%,rgba(7,12,24,.94) 70%,var(--bg) 100%),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
}
.cat-hero::after{
  content:"";
  position:absolute;inset:0;
  pointer-events:none;
  background-image:radial-gradient(circle at 82% 18%,rgba(47,216,198,.16),transparent 46%);
  opacity:.6;
}
.cat-hero .hero-inner{position:relative;z-index:2;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:26px;}
.crumb a{color:var(--text-2);}
.crumb a:hover{color:var(--primary);}
.crumb .sep{color:var(--text-3);}
.crumb .current{color:var(--text);}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid var(--glass-border);
  background:rgba(47,216,198,.07);
  color:var(--primary);
  font-size:13px;letter-spacing:.06em;
}
.hero-title{
  font-size:clamp(30px,4.4vw,52px);
  font-weight:700;
  line-height:1.18;
  margin:20px 0 18px;
  max-width:16em;
}
.hero-title em{font-style:normal;color:var(--primary);}
.hero-lede{max-width:44em;color:var(--text-2);font-size:17px;line-height:1.85;margin-bottom:28px;}
.hero-facts{display:flex;flex-wrap:wrap;gap:12px;}
.fact-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 16px;
  border-radius:var(--r-pill);
  border:1px solid var(--border);
  background:var(--glass);
  backdrop-filter:blur(14px);
  color:var(--text-2);
  font-size:13.5px;
}
.fact-chip b{color:var(--text);font-weight:600;}
.dot{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 8px rgba(47,216,198,.9);flex:0 0 auto;}

/* ============ 板块 ============ */
.section{padding:88px 0;}
.section-tight{padding:64px 0;}
.section-alt{background:var(--bg-3);border-top:1px solid var(--divider);border-bottom:1px solid var(--divider);}
.section-head{max-width:760px;margin-bottom:44px;}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.1em;color:var(--primary);}
.eyebrow::before{content:"";width:20px;height:1px;background:var(--primary);opacity:.8;}
.section-title{font-size:clamp(24px,2.6vw,36px);font-weight:700;margin:14px 0 14px;line-height:1.3;}
.section-desc{color:var(--text-2);font-size:16px;margin:0;}
.note{font-size:13px;color:var(--text-3);margin-top:14px;}

/* ============ 对照表 ============ */
.compare-wrap{border:1px solid var(--border);border-radius:var(--r-lg);background:var(--bg-3);box-shadow:var(--shadow-card);overflow:hidden;}
.table-scroll{overflow-x:auto;}
table.compare{width:100%;min-width:820px;border-collapse:collapse;font-size:15px;}
.compare th,.compare td{padding:16px 20px;border-bottom:1px solid var(--divider);text-align:left;vertical-align:top;}
.compare thead th{
  background:rgba(255,255,255,.035);
  color:var(--text-2);
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  white-space:nowrap;
}
.compare thead th.is-featured{color:var(--primary);}
.compare tbody th{
  width:190px;
  color:var(--text-2);
  font-weight:500;
  background:rgba(255,255,255,.015);
}
.compare tbody td{color:var(--text);font-variant-numeric:tabular-nums;}
.compare tbody td.is-featured{background:rgba(47,216,198,.05);}
.compare tbody tr:last-child th,.compare tbody tr:last-child td{border-bottom:none;}
.compare tbody tr:hover th{background:rgba(47,216,198,.07);color:var(--text);}
.compare tbody tr:hover td{background:rgba(47,216,198,.05);}
.compare tbody tr:hover td.is-featured{background:rgba(47,216,198,.09);}

/* ============ 价格卡 ============ */
.plan-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.plan-card{
  position:relative;
  padding:34px 32px 32px;
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  background:linear-gradient(160deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
  transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.plan-card:hover{transform:translateY(-2px);border-color:rgba(47,216,198,.3);}
.plan-card.is-featured{border-color:rgba(47,216,198,.45);box-shadow:var(--glow),var(--shadow-card);}
.plan-badge{
  position:absolute;top:-13px;left:32px;
  padding:5px 14px;border-radius:var(--r-pill);
  background:var(--accent);color:#231704;
  font-size:12px;font-weight:700;letter-spacing:.02em;
}
.plan-name{font-size:22px;font-weight:700;margin-bottom:6px;}
.plan-for{font-size:13.5px;color:var(--text-2);}
.plan-amount{
  display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;
  margin:22px 0 6px;
  font-size:32px;font-weight:700;color:var(--text);
  font-variant-numeric:tabular-nums;
}
.plan-amount small{font-size:14px;font-weight:500;color:var(--text-3);}
.plan-price-note{font-size:13px;color:var(--text-3);}
.plan-list{list-style:none;padding:0;margin:24px 0 0;}
.plan-list li{position:relative;padding-left:28px;margin-bottom:12px;color:var(--text-2);font-size:15px;}
.plan-list li::before{
  content:"";position:absolute;left:0;top:6px;width:16px;height:16px;border-radius:50%;
  background:rgba(47,216,198,.12);border:1px solid rgba(47,216,198,.45);
}
.plan-list li::after{
  content:"";position:absolute;left:5px;top:11px;width:6px;height:3px;
  border-left:1.6px solid var(--primary);border-bottom:1.6px solid var(--primary);
  transform:rotate(-45deg);
}
.plan-card .btn{width:100%;margin-top:26px;}
.plan-strip{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:22px;
  margin-top:24px;padding:26px 30px;
  border:1px dashed rgba(47,216,198,.34);
  border-radius:var(--r-lg);
  background:rgba(47,216,198,.04);
}
.plan-strip h3{font-size:19px;margin-bottom:8px;}
.plan-strip p{margin:0;color:var(--text-2);font-size:14.5px;max-width:62ch;}

/* ============ 费用构成 ============ */
.fee-list{
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  background:var(--bg-3);
  overflow:hidden;
}
.fee-row{
  display:grid;grid-template-columns:220px 1fr;gap:28px;
  padding:26px 30px;
  border-bottom:1px solid var(--divider);
  transition:background-color .18s ease;
}
.fee-row:last-child{border-bottom:none;}
.fee-row:hover{background:rgba(47,216,198,.04);}
.fee-row dt{color:var(--text);font-size:16.5px;font-weight:600;}
.fee-row dt span{display:block;font-size:12.5px;color:var(--primary);letter-spacing:.08em;margin-top:6px;font-weight:500;}
.fee-row dd{margin:0;color:var(--text-2);font-size:15px;}
.stat-bar{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:1px;background:var(--divider);
  border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;
  margin-top:24px;
}
.stat-cell{background:var(--bg-3);padding:24px 26px;}
.stat-cell .k{font-size:13px;color:var(--text-3);}
.stat-cell .v{font-size:20px;font-weight:600;color:var(--text);margin-top:8px;font-variant-numeric:tabular-nums;}

/* ============ 图文 ============ */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:52px;align-items:center;}
.split-media{position:relative;}
.split-media img{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-lg);border:1px solid var(--border);
  box-shadow:var(--shadow-float);
  background:linear-gradient(120deg,#0B1322,#101B2E);
}
.split-media figcaption{font-size:12.5px;color:var(--text-3);margin-top:12px;}
.split-body h2{margin-bottom:16px;}
.split-body p{color:var(--text-2);font-size:15.5px;}
.mini-list{list-style:none;padding:0;margin:22px 0 0;}
.mini-list li{
  display:grid;grid-template-columns:88px 1fr;gap:16px;
  padding:14px 0;border-top:1px solid var(--divider);
  font-size:14.5px;color:var(--text-2);
}
.mini-list li b{color:var(--primary);font-weight:600;font-size:13.5px;letter-spacing:.04em;}

/* ============ 步骤 ============ */
.step-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.step-card{
  padding:28px 26px;
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  background:var(--bg-2);
  transition:border-color .2s ease,transform .2s ease;
}
.step-card:hover{border-color:rgba(47,216,198,.32);transform:translateY(-2px);}
.step-card .num{
  display:inline-block;font-size:13px;letter-spacing:.14em;color:var(--primary);
  font-variant-numeric:tabular-nums;
}
.step-card h3{font-size:18px;margin:14px 0 10px;}
.step-card p{margin:0;color:var(--text-2);font-size:14.5px;}

/* ============ FAQ ============ */
.faq-wrap{border-top:1px solid var(--border);}
.accordion-item{background:transparent;border:none;border-bottom:1px solid var(--border);}
.accordion-button{
  display:flex;align-items:center;gap:16px;
  width:100%;padding:22px 8px 22px 0;
  background:transparent;
  color:var(--text);
  font-size:17px;font-weight:600;
  box-shadow:none;
  border-radius:0;
}
.accordion-button:not(.collapsed){color:var(--primary-hover);background:transparent;box-shadow:none;}
.accordion-button:hover{color:var(--primary-hover);}
.accordion-button:focus{box-shadow:none;outline:2px solid rgba(47,216,198,.55);outline-offset:2px;}
.accordion-button::after{display:none;}
.faq-num{font-size:13px;color:var(--text-3);letter-spacing:.08em;font-variant-numeric:tabular-nums;min-width:26px;}
.faq-plus{position:relative;width:18px;height:18px;margin-left:auto;flex:0 0 auto;transition:transform .18s ease;}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--primary);border-radius:2px;}
.faq-plus::before{left:0;right:0;top:8px;height:2px;}
.faq-plus::after{top:0;bottom:0;left:8px;width:2px;}
.accordion-button:not(.collapsed) .faq-plus{transform:rotate(45deg);}
.accordion-body{
  padding:0 56px 26px 42px;
  color:var(--text-2);
  font-size:15.5px;
  line-height:1.85;
  max-width:72ch;
}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;
  margin:8px 0 0;
  padding:52px 48px;
  border-radius:var(--r-xl);
  border:1px solid rgba(47,216,198,.22);
  background:linear-gradient(120deg,rgba(47,216,198,.1),rgba(242,169,59,.05) 70%,transparent),var(--bg-3);
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-60px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(47,216,198,.22),transparent 68%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:14px;position:relative;z-index:1;}
.cta-band p{color:var(--text-2);max-width:56ch;margin-bottom:28px;position:relative;z-index:1;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:1;}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;z-index:1;
  margin-top:96px;
  padding:64px 0 28px;
  background:#050912;
  border-top:1px solid var(--border);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-desc{color:var(--text-3);font-size:14px;margin:0;max-width:34ch;}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text);margin-bottom:18px;letter-spacing:.02em;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:11px;}
.footer-col a{color:var(--text-2);font-size:14px;transition:color .18s ease;}
.footer-col a:hover{color:var(--primary);}
.footer-contact li{display:flex;justify-content:space-between;gap:14px;color:var(--text-2);font-size:14px;}
.footer-contact li span:last-child{color:var(--text);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:52px;padding-top:22px;
  border-top:1px solid var(--divider);
  color:var(--text-3);font-size:13px;
}

/* ============ 返回顶部 ============ */
.back-top{
  position:fixed;right:22px;bottom:22px;z-index:1035;
  width:46px;height:46px;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;
  border:1px solid var(--glass-border);
  background:rgba(12,20,36,.72);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  color:var(--primary);
  cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease,border-color .2s ease;
}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.back-top:hover{border-color:rgba(47,216,198,.55);}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .nav-search input{width:168px;}
  .section{padding:76px 0;}
}
@media (max-width:991.98px){
  .plan-grid{grid-template-columns:1fr;}
  .split{grid-template-columns:1fr;gap:32px;}
  .step-row{grid-template-columns:1fr;}
  .split-media img{aspect-ratio:16/9;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .fee-row{grid-template-columns:1fr;gap:10px;padding:22px 24px;}
  .cta-band{padding:40px 28px;}
}
@media (max-width:767.98px){
  .container-xxl{padding-left:18px;padding-right:18px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .cat-hero{padding:20px 0 56px;}
  .hero-lede{font-size:16px;}
  .stat-bar{grid-template-columns:1fr;}
  .plan-card{padding:28px 22px;}
  .accordion-body{padding:0 8px 24px 42px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .back-top{right:14px;bottom:14px;}
}
@media (max-width:575.98px){
  .header-right{gap:8px;}
  .btn{padding:0 16px;font-size:14px;}
  .hero-title{font-size:28px;}
  .plan-amount{font-size:26px;}
  .fact-chip{font-size:12.5px;padding:8px 13px;}
  .cta-band{padding:32px 20px;border-radius:20px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation:none !important;transition:none !important;}
}