/* roulang page: index */
:root{
  --brand:#00C2A8;
  --brand-strong:#00A38E;
  --brand-soft:#E6FAF7;
  --accent:#FF6B4A;
  --accent-soft:#FFEDE8;
  --ink:#0C1A1D;
  --ink-2:#3D4F52;
  --ink-3:#7A8C8F;
  --bg:#FFFFFF;
  --bg-soft:#F4F7F6;
  --bg-deep:#0C1A1D;
  --line:#E3EAE8;
  --success:#17B26A;
  --warning:#F5A623;
  --danger:#E5484D;
  --radius-badge:8px;
  --radius-btn:12px;
  --radius-card:16px;
  --radius-xl:24px;
  --shadow-1:0 1px 2px rgba(12,26,29,.06);
  --shadow-2:0 8px 24px rgba(12,26,29,.08);
  --shadow-3:0 24px 48px rgba(12,26,29,.12);
  --container:1200px;
  --nav-h:68px;
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",Inter,Sora,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
input{font:inherit}
svg{display:block}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:rgba(0,194,168,.22)}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:100px 0}
.section-soft{background:var(--bg-soft)}
.section-head{max-width:760px;margin-bottom:52px}
.section-head h2{font-size:clamp(26px,3vw,34px);line-height:1.25;font-weight:800}
.section-head p{margin-top:16px;font-size:16.5px;color:var(--ink-2)}
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--brand-strong);margin-bottom:14px}
.kicker::before{content:"";width:18px;height:2px;background:var(--brand);border-radius:2px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-1)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.4);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.75);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand);transition:gap .18s ease,color .18s ease}
.link-arrow:hover{gap:10px;color:var(--brand-strong);text-decoration:underline;text-decoration-color:var(--accent);text-decoration-thickness:2px;text-underline-offset:4px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s ease,background .22s ease;
}
.site-header.scrolled{box-shadow:var(--shadow-1);background:#fff}
.nav-wrap{display:flex;align-items:center;height:var(--nav-h);gap:20px;transition:height .22s ease}
.site-header.scrolled .nav-wrap{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{
  width:34px;height:34px;border-radius:9px;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:800;letter-spacing:.02em;
  box-shadow:0 6px 14px rgba(0,194,168,.32);
}
.logo-text{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.01em}
.logo:hover .logo-mark{background:var(--brand-strong)}
.nav-panel{display:flex;align-items:center;flex:1;gap:16px}
.nav-links{display:flex;align-items:center;flex:1;gap:2px}
.nav-link{
  position:relative;padding:0 16px;line-height:var(--nav-h);
  font-size:15px;font-weight:500;color:var(--ink-2);
  transition:color .18s ease,line-height .22s ease;
}
.site-header.scrolled .nav-link{line-height:60px}
.nav-link:hover{color:var(--brand)}
.nav-link.active{color:var(--brand);font-weight:700}
.nav-link.active::after{content:"";position:absolute;left:16px;right:16px;bottom:0;height:2px;background:var(--brand);border-radius:2px 2px 0 0}
.nav-search{
  position:relative;display:flex;align-items:center;gap:8px;
  width:264px;height:40px;padding:0 12px;
  border:1px solid var(--line);border-radius:999px;background:var(--bg-soft);
  transition:background .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 4px rgba(0,194,168,.14)}
.nav-search svg{color:var(--ink-3);flex:none}
.nav-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px;color:var(--ink)}
.nav-search input::placeholder{color:var(--ink-3)}
.kbd{font-size:11px;color:var(--ink-3);border:1px solid var(--line);border-radius:6px;padding:1px 6px;background:#fff;flex:none}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  align-items:center;justify-content:center;color:var(--ink);background:#fff;position:relative;z-index:80;
}

/* ============ Hero ============ */
.hero{position:relative;background:var(--bg-deep);color:#fff;overflow:hidden;padding:72px 0 96px}
.hero-bg{position:absolute;inset:0;z-index:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;opacity:.45}
.hero-overlay{position:absolute;inset:0;z-index:1;background:linear-gradient(115deg,rgba(12,26,29,.94) 0%,rgba(12,26,29,.78) 48%,rgba(12,26,29,.58) 100%)}
.hero-mesh{
  position:absolute;inset:0;z-index:2;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:24px 24px;
}
.hero-grid{position:relative;z-index:3;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;min-height:calc(82vh - var(--nav-h))}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(0,194,168,.14);border:1px solid rgba(0,194,168,.38);
  color:#7DF0E0;font-size:13px;font-weight:600;
}
.hero h1{
  margin-top:24px;font-size:clamp(30px,4vw,52px);line-height:1.15;font-weight:800;
  letter-spacing:-.02em;color:#fff;max-width:640px;
}
.hero-sub{margin-top:22px;font-size:17px;line-height:1.8;color:rgba(255,255,255,.78);max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}
.hero-trust{display:flex;flex-wrap:wrap;gap:14px 28px;margin-top:36px}
.hero-trust li{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72)}
.hero-trust svg{color:var(--brand);flex:none}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-xl);
  border:1px solid rgba(255,255,255,.14);box-shadow:var(--shadow-3);
}
.float-card{
  position:absolute;display:flex;flex-direction:column;gap:2px;min-width:150px;
  background:rgba(255,255,255,.97);border-radius:14px;padding:14px 18px;box-shadow:var(--shadow-3);
}
.fc-1{top:-22px;left:-28px}
.fc-2{bottom:-24px;right:-20px}
.float-num{font-size:20px;font-weight:800;color:var(--accent);letter-spacing:-.02em;line-height:1.3}
.float-label{font-size:12.5px;color:var(--ink-3)}

/* ============ 卖点错落三连 ============ */
.hl-grid{display:grid;grid-template-columns:1.85fr 1fr;gap:24px;align-items:stretch}
.hl-side{display:grid;gap:24px;grid-template-rows:1fr 1fr}
.hl-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:28px;box-shadow:var(--shadow-1);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.hl-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:#CDEFE9}
.hl-main{display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:start;padding:40px}
.hl-icon{
  width:52px;height:52px;border-radius:14px;background:var(--brand-soft);border:1px solid #CDEFE9;
  display:flex;align-items:center;justify-content:center;color:var(--brand-strong);flex:none;
}
.hl-card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.hl-card p{font-size:15px;color:var(--ink-2);line-height:1.8}
.hl-card .link-arrow{margin-top:16px}
.hl-card.small .hl-icon{width:44px;height:44px;border-radius:12px;margin-bottom:16px}
.hl-card.small h3{font-size:17.5px}

/* ============ 场景演示 ============ */
.demo-grid{display:grid;grid-template-columns:250px 1fr;gap:32px;align-items:start}
.demo-tabs{display:flex;flex-direction:column;gap:12px}
.demo-tab{
  text-align:left;padding:16px 18px;border-radius:14px;border:1px solid var(--line);
  background:#fff;font-size:15px;font-weight:600;color:var(--ink-2);
  transition:border-color .18s ease,background .18s ease,color .18s ease,box-shadow .18s ease;
}
.demo-tab:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--shadow-1)}
.demo-tab.active{background:var(--brand-soft);border-color:var(--brand);color:var(--brand-strong);box-shadow:var(--shadow-1)}
.demo-tab span{display:block;font-size:12.5px;font-weight:400;color:var(--ink-3);margin-top:4px}
.demo-tab.active span{color:var(--brand-strong);opacity:.8}
.demo-panel{display:none}
.demo-panel.active{display:block;animation:fadeUp .28s ease}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.demo-inner{
  display:grid;grid-template-columns:1.05fr 1fr;gap:32px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-xl);
  padding:28px;box-shadow:var(--shadow-1);
}
.demo-inner img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-card)}
.demo-copy .tag{display:inline-block;font-size:12.5px;font-weight:600;color:var(--accent);background:var(--accent-soft);border-radius:var(--radius-badge);padding:4px 10px;margin-bottom:14px}
.demo-copy h3{font-size:22px;line-height:1.4;font-weight:700;margin-bottom:12px}
.demo-copy p{font-size:15.5px;color:var(--ink-2)}
.demo-metrics{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin-top:26px;font-size:13.5px;color:var(--ink-3)}
.demo-metrics strong{color:var(--ink);font-weight:700}
.demo-metrics i{color:var(--line);font-style:normal}

/* ============ 社会认同 ============ */
.stats-band{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius-xl);
  padding:34px 30px;
}
.stat-num{font-size:clamp(26px,3vw,34px);font-weight:800;color:var(--accent);letter-spacing:-.02em;line-height:1.2}
.stat-label{font-size:14px;color:var(--ink-3);margin-top:8px}
.quotes{display:flex;gap:20px;overflow-x:auto;padding:32px 4px 14px;scroll-snap-type:x mandatory}
.quotes::-webkit-scrollbar{height:6px}
.quotes::-webkit-scrollbar-thumb{background:var(--line);border-radius:3px}
.quote-card{
  flex:0 0 320px;scroll-snap-align:start;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);padding:24px;box-shadow:var(--shadow-1);
  transition:box-shadow .22s ease,transform .22s ease;
}
.quote-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px)}
.quote-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--brand-soft);border:1px solid #CDEFE9;color:var(--brand-strong);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex:none}
.quote-name{font-size:14.5px;font-weight:700;color:var(--ink)}
.quote-role{font-size:12.5px;color:var(--ink-3)}
.quote-text{font-size:14.5px;color:var(--ink-2);line-height:1.8}
.stars{display:flex;gap:3px;margin-top:14px;color:var(--warning)}
.partner-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.partner{
  font-size:13px;color:var(--ink-3);border:1px solid var(--line);border-radius:999px;
  padding:8px 18px;background:#fff;transition:color .18s ease,border-color .18s ease;
}
.partner:hover{color:var(--brand-strong);border-color:#CDEFE9}

/* ============ 内容列表（CMS） ============ */
.list-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:44px}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-1);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;
}
.post-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:#CDEFE9}
.post-thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft)}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-body{display:flex;flex-direction:column;gap:12px;flex:1;padding:22px 24px 20px}
.badge{
  align-self:flex-start;font-size:12px;font-weight:600;color:var(--brand-strong);
  background:var(--brand-soft);border:1px solid #CDEFE9;border-radius:var(--radius-badge);padding:3px 10px;
}
.post-title{
  font-size:18px;line-height:1.45;font-weight:700;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-title a:hover{color:var(--brand)}
.post-excerpt{
  font-size:14.5px;color:var(--ink-3);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-3);
}
.post-more{color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:4px}
.post-more:hover{gap:8px}
.empty-state{
  grid-column:1/-1;text-align:center;padding:56px 24px;background:#fff;
  border:1px dashed var(--line);border-radius:var(--radius-card);
}
.empty-icon{
  width:64px;height:64px;margin:0 auto 18px;border-radius:18px;background:var(--bg-soft);
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--brand);
}
.empty-state p{font-size:15px;color:var(--ink-3);margin-bottom:20px}

/* ============ FAQ ============ */
.faq-list{max-width:840px;margin:0 auto;display:grid;gap:14px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item.open{border-color:#CDEFE9;box-shadow:var(--shadow-1)}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--brand-strong)}
.faq-item.open .faq-q::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--brand);border-radius:0 3px 3px 0}
.faq-arrow{color:var(--brand);flex:none;transition:transform .28s ease}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:420px}
.faq-a p{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--ink-2)}

/* ============ 底部转化区 ============ */
.cta-box{
  position:relative;overflow:hidden;background:var(--bg-deep);border-radius:var(--radius-xl);
  padding:56px;color:#fff;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;
}
.cta-box::after{
  content:"";position:absolute;right:-60px;bottom:-70px;width:240px;height:240px;
  border-radius:48px;background:rgba(0,194,168,.14);transform:rotate(18deg);
}
.cta-box::before{
  content:"";position:absolute;right:120px;top:-50px;width:120px;height:120px;
  border-radius:28px;background:rgba(255,107,74,.14);transform:rotate(-12deg);
}
.cta-copy{position:relative;z-index:2}
.cta-copy h2{color:#fff;font-size:clamp(24px,2.8vw,32px);line-height:1.3;font-weight:800}
.cta-copy p{margin-top:16px;font-size:15.5px;color:rgba(255,255,255,.74);max-width:520px}
.cta-form{position:relative;z-index:2}
.form-row{display:flex;gap:12px;flex-wrap:wrap}
.form-field{flex:1 1 220px;min-width:0}
.form-field input{
  width:100%;height:46px;padding:0 16px;border-radius:var(--radius-btn);
  border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.07);color:#fff;font-size:15px;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.form-field input::placeholder{color:rgba(255,255,255,.5)}
.form-field input:focus{outline:none;border-color:var(--brand);background:rgba(255,255,255,.12);box-shadow:0 0 0 4px rgba(0,194,168,.18)}
.form-hint{font-size:13px;color:rgba(255,255,255,.58);margin-top:12px}
.form-msg{margin-top:10px;font-size:13px;display:none;align-items:center;gap:6px}
.form-msg.error{display:flex;color:#FFB3A3}
.form-msg.ok{display:flex;color:#7DF0E0}

/* ============ 页脚 ============ */
.site-footer{background:var(--bg-deep);color:#A8BCB9;padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px}
.footer-brand .logo-text{color:#fff}
.footer-brand .logo-mark{box-shadow:none}
.footer-desc{font-size:14px;line-height:1.85;margin-top:18px;max-width:330px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px}
.footer-col a{position:relative;display:block;font-size:14px;padding:7px 0 7px 0;transition:color .18s ease,padding-left .18s ease}
.footer-col a::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:0;height:2px;background:var(--accent);transition:width .2s ease}
.footer-col a:hover{color:#fff;padding-left:12px}
.footer-col a:hover::before{width:7px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0 28px;font-size:13px;
}
.footer-bottom .tech{color:#6E8380}
.back-top{
  display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 16px;border-radius:999px;
  border:1px solid rgba(255,255,255,.18);color:#CFE0DD;font-size:13px;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.back-top:hover{border-color:var(--brand);color:#fff;background:rgba(0,194,168,.12)}

/* ============ 底部固定转化条 ============ */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:50;background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -8px 24px rgba(12,26,29,.08);transform:translateY(110%);
  transition:transform .32s cubic-bezier(.4,0,.2,1);
}
.sticky-cta.show{transform:translateY(0)}
.sticky-inner{display:flex;align-items:center;gap:20px;height:64px}
.sticky-text{font-size:14.5px;font-weight:600;color:var(--ink)}
.sticky-trust{display:flex;gap:18px;margin-left:auto;font-size:13px;color:var(--ink-3)}
.sticky-trust span{display:inline-flex;align-items:center;gap:6px}
.sticky-trust svg{color:var(--brand)}
.sticky-close{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--ink-3);border:1px solid var(--line);transition:color .18s ease,border-color .18s ease}
.sticky-close:hover{color:var(--ink);border-color:var(--ink-3)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:960px}
  .hero-grid{gap:40px}
  .fc-1{left:-16px}
  .fc-2{right:-12px}
}
@media (max-width:1023px){
  .section{padding:80px 0}
  .hl-grid{grid-template-columns:1fr}
  .hl-side{grid-template-columns:1fr 1fr;grid-template-rows:auto}
  .demo-grid{grid-template-columns:1fr;gap:24px}
  .demo-tabs{flex-direction:row;overflow-x:auto;padding-bottom:4px}
  .demo-tab{flex:0 0 auto;min-width:180px}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .stats-band{grid-template-columns:repeat(2,1fr)}
  .cta-box{grid-template-columns:1fr;padding:44px;gap:32px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .nav-toggle{display:flex}
  .nav-panel{
    position:fixed;top:0;right:-100%;z-index:70;width:min(340px,86vw);height:100vh;
    flex-direction:column;align-items:stretch;gap:20px;
    background:#fff;padding:88px 22px 28px;box-shadow:var(--shadow-3);
    transition:right .3s ease;overflow-y:auto;
  }
  .nav-panel.open{right:0}
  .nav-links{flex-direction:column;align-items:stretch;flex:none;gap:2px}
  .nav-link{line-height:48px;padding:0 8px;border-bottom:1px solid var(--line)}
  .nav-link.active::after{left:8px;right:8px;bottom:-1px}
  .site-header.scrolled .nav-link{line-height:48px}
  .nav-panel .nav-search{width:100%;order:-1}
  .nav-panel .nav-cta{order:2;width:100%;height:46px}
  .hero{padding:56px 0 72px}
  .hero-grid{grid-template-columns:1fr;min-height:0;gap:44px}
  .hero-visual img{aspect-ratio:16/10}
  .fc-1{top:-18px;left:10px}
  .fc-2{bottom:-18px;right:10px}
  .list-head{flex-direction:column;align-items:flex-start;gap:12px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 16px}
  .section{padding:64px 0}
  .section-head{margin-bottom:34px}
  .hero h1{font-size:clamp(28px,7.4vw,34px)}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{width:100%}
  .hero-trust{gap:10px 20px;margin-top:28px}
  .hl-main{padding:26px;grid-template-columns:1fr;gap:16px}
  .hl-side{grid-template-columns:1fr}
  .demo-inner{grid-template-columns:1fr;padding:20px}
  .stats-band{grid-template-columns:1fr 1fr;gap:20px;padding:26px 22px}
  .post-grid{grid-template-columns:1fr}
  .quote-card{flex:0 0 268px}
  .cta-box{padding:32px 24px;border-radius:20px}
  .form-row{flex-direction:column}
  .form-field input{height:46px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding-bottom:32px}
  .footer-brand{grid-column:1/-1}
  .sticky-inner{height:56px;gap:12px}
  .sticky-text{font-size:13.5px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .sticky-trust{display:none}
  .sticky-cta .btn-sm{height:38px;padding:0 16px;font-size:13.5px}
}
@media (max-width:480px){
  .hero-mesh{display:none}
  .float-card{min-width:132px;padding:12px 14px}
  .float-num{font-size:17px}
  .footer-grid{grid-template-columns:1fr}
  .stats-band{grid-template-columns:1fr}
  .partner{padding:7px 14px;font-size:12.5px}
}

/* roulang page: article */
:root{
  --brand:#00C2A8;
  --brand-strong:#00A38E;
  --brand-soft:#E6FAF7;
  --accent:#FF6B4A;
  --accent-soft:#FFEDE8;
  --ink:#0C1A1D;
  --ink-2:#3D4F52;
  --ink-3:#7A8C8F;
  --bg:#FFFFFF;
  --bg-soft:#F4F7F6;
  --bg-deep:#0C1A1D;
  --line:#E3EAE8;
  --success:#17B26A;
  --warning:#F5A623;
  --danger:#E5484D;
  --shadow-1:0 1px 2px rgba(12,26,29,.06);
  --shadow-2:0 8px 24px rgba(12,26,29,.08);
  --shadow-3:0 24px 48px rgba(12,26,29,.12);
  --r-xs:8px;
  --r-sm:10px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:24px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-2);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",Inter,"Sora",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-strong);text-decoration:none;transition:color .2s ease,border-color .2s ease}
button,input{font:inherit;color:inherit}
ul,ol{padding-left:1.35em}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.3}
p{margin:0 0 1.1em}
::selection{background:var(--brand-soft);color:var(--ink)}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--shadow-1)}
.nav-wrap{display:flex;align-items:center;gap:24px;height:68px;transition:height .25s ease}
.site-header.is-scrolled .nav-wrap{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:36px;height:36px;border-radius:var(--r-sm);
  background:linear-gradient(135deg,var(--brand),var(--brand-strong));
  color:#fff;display:grid;place-items:center;
  font-size:14px;font-weight:800;letter-spacing:.03em;
}
.logo-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;margin-left:auto;
  border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;color:var(--ink);cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand-strong)}
.nav-panel{margin-left:auto;display:flex;align-items:center;gap:20px}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;padding:8px 13px;border-radius:var(--r-xs);
  font-size:15px;font-weight:500;color:var(--ink-2);
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--brand-strong);background:var(--brand-soft)}
.nav-link.active{color:var(--brand-strong);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;
  height:2px;border-radius:2px;background:var(--brand);
}
.nav-search{
  display:flex;align-items:center;gap:8px;width:260px;height:40px;
  padding:0 10px 0 12px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--bg-soft);color:var(--ink-3);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.nav-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(0,194,168,.14)}
.nav-search input{border:0;background:transparent;outline:none;width:100%;font-size:14px;color:var(--ink)}
.nav-search input::placeholder{color:var(--ink-3)}
.kbd{
  font-size:11px;line-height:1;padding:4px 6px;border:1px solid var(--line);
  border-radius:6px;background:#fff;color:var(--ink-3);white-space:nowrap;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-md);
  font-size:15.5px;font-weight:600;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;text-decoration:none;
  transition:transform .16s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
}
.btn-sm{height:38px;padding:0 16px;font-size:14.5px;border-radius:var(--r-sm)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--brand-strong);color:#fff;transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand-strong)}
.btn-ghost{background:var(--brand-soft);color:var(--brand-strong)}
.btn-ghost:hover{background:#d6f5ef}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.link-more{font-size:14.5px;font-weight:600;color:var(--brand-strong);border-bottom:2px solid transparent;padding-bottom:2px}
.link-more:hover{border-bottom-color:var(--accent)}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;
  background:var(--bg-soft);
  border-bottom:1px solid var(--line);
  padding:30px 0 48px;
}
.article-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(12,26,29,.045) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(12,26,29,.045) 1px,transparent 1px);
  background-size:24px 24px;
}
.article-hero::after{
  content:"";position:absolute;right:-40px;top:-40px;width:180px;height:180px;
  border-radius:32px;background:rgba(0,194,168,.10);transform:rotate(18deg);
  pointer-events:none;
}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);margin-bottom:22px}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand-strong)}
.breadcrumb .sep{color:#C3D0CE}
.breadcrumb .current{color:var(--ink-2)}
.cat-pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-strong);
  font-size:13px;font-weight:600;border:1px solid rgba(0,194,168,.22);
  margin-bottom:16px;
}
.article-hero h1{
  font-size:clamp(30px,4vw,48px);
  line-height:1.16;
  letter-spacing:-.02em;
  font-weight:800;
  max-width:900px;
  margin-bottom:18px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--ink-3)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C3D0CE}
.article-meta strong{color:var(--ink-2);font-weight:600}

/* ---------- article layout ---------- */
.article-main{padding:56px 0 24px}
.article-grid{
  display:grid;
  grid-template-columns:minmax(0,760px) 220px;
  justify-content:center;
  gap:64px;
}
.article-col{min-width:0}
.article-body{font-size:17px;line-height:1.9;color:var(--ink-2);word-wrap:break-word}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.4em}
.article-body h2{
  position:relative;
  font-size:26px;line-height:1.32;
  margin:40px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.24em;bottom:.24em;
  width:4px;border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:19px;font-weight:600;margin:28px 0 12px}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:1.4em}
.article-body li{margin-bottom:.5em}
.article-body blockquote{
  margin:24px 0;padding:20px 22px;
  background:var(--bg-soft);
  border-left:3px solid var(--brand);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--ink-2);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r-md);margin:24px 0}
.article-body figure{margin:24px 0}
.article-body figure img{margin:0}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:8px}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;line-height:1.6;
}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body thead th{background:var(--bg-soft);color:var(--ink);font-weight:600}
.article-body tbody tr:nth-child(even){background:#FAFCFB}
.article-body a{color:var(--brand-strong);border-bottom:1px solid rgba(0,194,168,.35)}
.article-body a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.article-body code{
  background:var(--bg-soft);padding:2px 6px;border-radius:6px;
  font-size:.92em;color:var(--ink);
}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.article-body .table-scroll{overflow-x:auto}

/* ---------- toc ---------- */
.toc{
  position:sticky;top:96px;align-self:start;
  border-left:1px solid var(--line);
  padding-left:20px;
  font-size:14px;
}
.toc[hidden]{display:none}
.toc-title{
  font-size:12px;letter-spacing:.14em;color:var(--ink-3);
  font-weight:600;margin-bottom:14px;
}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:60vh;overflow:auto}
.toc-list a{
  display:block;padding:6px 0;color:var(--ink-3);line-height:1.5;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  border-left:2px solid transparent;padding-left:10px;margin-left:-12px;
  transition:color .18s ease,border-color .18s ease;
}
.toc-list a:hover{color:var(--brand-strong)}
.toc-list a.active{color:var(--brand-strong);font-weight:600;border-left-color:var(--brand)}

/* ---------- tags ---------- */
.tag-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:48px;padding-top:26px;border-top:1px solid var(--line);
}
.tag-row .tag-label{font-size:13px;color:var(--ink-3);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;
  font-size:13px;padding:6px 13px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-strong);
  border:1px solid rgba(0,194,168,.2);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.tag:hover{background:var(--brand);color:#fff;border-color:var(--brand)}

/* ---------- empty state ---------- */
.empty-state{
  text-align:center;padding:56px 24px;
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--r-xl);
}
.empty-icon{
  width:64px;height:64px;margin:0 auto 18px;border-radius:var(--r-lg);
  background:#fff;border:1px solid rgba(0,194,168,.28);
  display:grid;place-items:center;color:var(--brand);
}
.empty-state h2{font-size:20px;margin-bottom:10px}
.empty-state p{color:var(--ink-3);font-size:15px;margin-bottom:22px}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section-soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,2.6vw,32px);line-height:1.25}
.section-head .sub{font-size:15px;color:var(--ink-3);max-width:560px;margin-top:10px}

/* ---------- cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:#D6E3E0}
.card-media{
  position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft);
}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-badge{
  align-self:flex-start;font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:var(--r-xs);
  background:var(--accent-soft);color:#C6442A;
}
.card-title{
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s ease;
}
.card:hover .card-title{color:var(--brand-strong)}
.card-desc{
  font-size:14.5px;color:var(--ink-2);line-height:1.7;margin:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
.card-meta .arrow{color:var(--brand-strong);font-weight:600;display:inline-flex;align-items:center;gap:4px}
.card:hover .card-meta .arrow{color:var(--accent)}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--bg-soft);
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  padding:48px 40px;
  display:grid;grid-template-columns:1.3fr 1fr;
  gap:32px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;bottom:-70px;width:200px;height:200px;
  border-radius:40px;background:rgba(255,107,74,.10);transform:rotate(-14deg);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);line-height:1.28;margin-bottom:12px}
.cta-band p{color:var(--ink-2);font-size:15.5px;margin:0;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;position:relative;z-index:1}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.trust-item{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:var(--ink-3);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 12px;
}
.trust-item svg{color:var(--brand)}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-deep);color:#A8BCB9;padding:64px 0 28px;margin-top:88px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand .logo-text{color:#fff}
.footer-desc{font-size:14px;line-height:1.8;color:#A8BCB9;margin:16px 0 0;max-width:320px}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col a{
  display:block;font-size:14px;color:#A8BCB9;padding:6px 0 6px 0;
  position:relative;transition:color .2s ease,padding-left .2s ease;
}
.footer-col a::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:0;height:2px;background:var(--accent);transition:width .2s ease;
}
.footer-col a:hover{color:#fff;padding-left:12px}
.footer-col a:hover::before{width:8px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.10);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:13px;color:#8CA5A1;
}
.footer-bottom .tech{color:#7E9490}
.back-top{display:inline-flex;align-items:center;gap:6px;color:#A8BCB9;font-size:13px}
.back-top:hover{color:#fff}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{max-width:960px}
  .article-grid{grid-template-columns:minmax(0,760px) 200px;gap:40px}
}
@media (max-width:1100px){
  .article-grid{grid-template-columns:minmax(0,760px);gap:0;justify-content:center}
  .toc{display:none}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .nav-panel{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:14px;
    padding:18px 24px 24px;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow-2);
    display:none;
  }
  .nav-panel.open{display:flex}
  .nav-links{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{padding:11px 12px}
  .nav-link.active::after{left:0;right:auto;bottom:6px;top:6px;width:3px;height:auto}
  .nav-search{width:100%}
  .nav-cta{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{grid-template-columns:1fr;padding:40px 28px}
  .cta-actions{justify-content:flex-start}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 16px}
  .section{padding:60px 0}
  .article-hero{padding:22px 0 36px}
  .article-main{padding:36px 0 16px}
  .article-body{font-size:16.5px;line-height:1.85}
  .article-body h2{font-size:22px;margin:34px 0 14px}
  .article-body h3{font-size:17.5px}
  .article-body .table-scroll{margin:24px 0;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .article-body table{min-width:520px;margin:0}
  .grid-3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .cta-band{padding:32px 22px}
  .btn{width:100%}
  .btn.btn-inline{width:auto}
  .section-head{margin-bottom:26px}
}
@media (max-width:480px){
  .article-hero::before,.article-hero::after{display:none}
  .logo-text{font-size:16px}
  .article-hero h1{font-size:30px}
}

/* roulang page: category1 */
:root{
  --brand:#00C2A8;
  --brand-strong:#00A38E;
  --brand-soft:#E6FAF7;
  --accent:#FF6B4A;
  --accent-soft:#FFEDE8;
  --ink:#0C1A1D;
  --ink-2:#3D4F52;
  --ink-3:#7A8C8F;
  --bg:#FFFFFF;
  --bg-soft:#F4F7F6;
  --bg-deep:#0C1A1D;
  --line:#E3EAE8;
  --success:#17B26A;
  --warning:#F5A623;
  --danger:#E5484D;
  --r-btn:12px;
  --r-card:16px;
  --r-lg:24px;
  --shadow-1:0 1px 2px rgba(12,26,29,.06);
  --shadow-2:0 8px 24px rgba(12,26,29,.08);
  --shadow-3:0 24px 48px rgba(12,26,29,.12);
  --container:1200px;
  --font:"Inter","Sora",system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.75;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand-soft);color:var(--ink)}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px) saturate(160%);
  border-bottom:1px solid var(--line);
  transition:box-shadow .2s ease;
}
.site-header.scrolled{box-shadow:var(--shadow-1)}
.nav-wrap{display:flex;align-items:center;gap:20px;height:68px;transition:height .2s ease}
.site-header.scrolled .nav-wrap{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);flex-shrink:0}
.logo-mark{
  width:38px;height:38px;border-radius:12px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:14px;font-weight:800;letter-spacing:.04em;
  box-shadow:var(--shadow-2);
}
.logo-text{font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.nav-toggle{
  display:none;width:42px;height:42px;margin-left:auto;
  border:1px solid var(--line);border-radius:12px;background:#fff;
  align-items:center;justify-content:center;color:var(--ink);
  transition:border-color .18s ease,color .18s ease;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.nav-panel{display:flex;align-items:center;gap:18px;flex:1;min-width:0}
.nav-links{display:flex;align-items:center;gap:4px;margin-right:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:8px 12px;border-radius:10px;
  font-size:15px;font-weight:600;color:var(--ink-2);
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--brand);background:var(--brand-soft)}
.nav-link.active{color:var(--brand)}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-search{
  display:flex;align-items:center;gap:8px;
  width:266px;height:44px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--bg-soft);color:var(--ink-3);flex-shrink:0;
  transition:border-color .18s ease,background .18s ease,box-shadow .18s ease;
}
.nav-search:hover{border-color:#CFDEDA}
.nav-search:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 4px rgba(0,194,168,.12)}
.nav-search input{
  flex:1;min-width:0;border:0;background:none;outline:none;
  font-size:14px;color:var(--ink);
}
.nav-search input::placeholder{color:var(--ink-3)}
.kbd{
  font-size:11px;line-height:1;padding:4px 6px;border:1px solid var(--line);
  border-radius:6px;background:#fff;color:var(--ink-3);flex-shrink:0;
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15.5px;font-weight:600;border:1px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease,transform .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0);background:var(--brand-strong)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:40px;padding:0 16px;font-size:14.5px;border-radius:10px}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn-on-dark{background:#fff;color:var(--ink)}
.btn-on-dark:hover{background:var(--brand-soft);color:var(--brand-strong);transform:translateY(-1px)}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand);
  border-bottom:2px solid transparent;padding-bottom:2px;
  transition:border-color .18s ease,color .18s ease;
}
.link-arrow:hover{border-color:var(--accent);color:var(--brand-strong)}

/* ---------- page banner ---------- */
.page-banner{position:relative;background:var(--bg-deep);color:#fff;overflow:hidden}
.page-banner img.banner-bg{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.42;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,26,29,.72),rgba(12,26,29,.92));
}
.banner-inner{position:relative;z-index:2;padding:60px 0 54px}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:#A8BCB9;margin-bottom:18px;
}
.breadcrumb a{transition:color .18s ease}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{color:rgba(255,255,255,.35)}
.banner-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:#7BE7D8;
  background:rgba(0,194,168,.16);border:1px solid rgba(0,194,168,.32);
  padding:5px 12px;border-radius:8px;margin-bottom:18px;
}
.banner-inner h1{
  font-size:clamp(30px,4vw,52px);line-height:1.15;letter-spacing:-.02em;
  font-weight:800;color:#fff;max-width:820px;margin-bottom:18px;
}
.banner-lead{max-width:720px;font-size:17px;line-height:1.75;color:#C9D6D4;margin-bottom:30px}
.banner-stats{
  display:flex;flex-wrap:wrap;gap:12px 34px;
  border-top:1px solid rgba(255,255,255,.14);padding-top:22px;
}
.banner-stats span{font-size:14px;color:#A8BCB9;display:inline-flex;align-items:baseline;gap:8px}
.banner-stats strong{font-size:20px;font-weight:800;color:var(--accent);letter-spacing:-.01em}

/* ---------- layout ---------- */
.layout{
  display:grid;grid-template-columns:248px minmax(0,1fr);gap:48px;
  padding-top:56px;padding-bottom:96px;align-items:start;
}
.anchor-nav{
  position:sticky;top:96px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 16px;box-shadow:var(--shadow-1);
}
.anchor-nav h2{
  font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--ink-3);
  padding:0 12px;margin-bottom:12px;
}
.anchor-nav a{
  display:flex;align-items:center;gap:10px;
  padding:10px 12px;border-radius:10px;
  font-size:14.5px;font-weight:600;color:var(--ink-2);
  border-left:2px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.anchor-nav a .num{
  font-size:12px;font-weight:700;color:var(--ink-3);
  font-variant-numeric:tabular-nums;
}
.anchor-nav a:hover{background:var(--bg-soft);color:var(--brand)}
.anchor-nav a.active{background:var(--brand-soft);color:var(--brand);border-left-color:var(--brand)}
.anchor-nav a.active .num{color:var(--brand)}
.anchor-note{
  margin-top:14px;padding:14px 12px 4px;border-top:1px dashed var(--line);
  font-size:13px;line-height:1.7;color:var(--ink-3);
}

/* ---------- blocks ---------- */
.content-col{min-width:0}
.block{scroll-margin-top:104px}
.block + .band-sep{margin:56px 0}
.band-sep{
  background:var(--bg-soft);
  background-image:
    linear-gradient(rgba(12,26,29,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(12,26,29,.045) 1px,transparent 1px);
  background-size:24px 24px,24px 24px;
  border-radius:14px;
  padding:16px 22px;
  display:flex;align-items:center;gap:12px;
  font-size:14px;color:var(--ink-3);
}
.band-sep i{
  width:8px;height:8px;border-radius:3px;background:var(--brand);
  display:inline-block;flex-shrink:0;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--brand);
  background:var(--brand-soft);padding:5px 12px;border-radius:8px;margin-bottom:14px;
}
.block h2{
  font-size:clamp(24px,2.6vw,32px);line-height:1.25;letter-spacing:-.01em;
  font-weight:800;color:var(--ink);margin-bottom:14px;max-width:760px;
}
.block h2 + p{margin-top:0}
.block p{max-width:760px;margin-bottom:16px}
.block p:last-child{margin-bottom:0}
.muted{color:var(--ink-3);font-size:14.5px}

.feature-split{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:32px;align-items:center;margin:28px 0 8px;
}
.feature-split img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-lg);box-shadow:var(--shadow-2);
  background:var(--bg-soft);
}
.feature-split h3{font-size:19px;font-weight:700;color:var(--ink);margin-bottom:10px}
.feature-split p{font-size:15.5px;margin-bottom:12px}
.feature-split ul{display:grid;gap:8px}
.feature-split li{
  position:relative;padding-left:18px;font-size:15px;color:var(--ink-2);
}
.feature-split li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:2px;
  background:var(--brand);
}

.entry-list{margin-top:28px;border-top:1px solid var(--line)}
.entry{
  display:grid;grid-template-columns:auto minmax(0,1fr);gap:18px;
  padding:20px 0;border-bottom:1px solid var(--line);
}
.entry .idx{
  font-size:14px;font-weight:800;color:var(--brand);
  font-variant-numeric:tabular-nums;padding-top:3px;
}
.entry h3{font-size:18px;font-weight:600;color:var(--ink);margin-bottom:6px}
.entry p{font-size:15.5px;margin-bottom:0;max-width:680px}

/* ---------- dark HUD ---------- */
.hud{
  position:relative;overflow:hidden;
  background:var(--bg-deep);color:#fff;
  border-radius:var(--r-lg);padding:32px;margin:28px 0 24px;
  border:1px solid rgba(255,255,255,.08);
}
.hud::after{
  content:"";position:absolute;right:-18px;top:-18px;width:96px;height:96px;
  border-radius:20px;background:rgba(0,194,168,.14);
}
.hud::before{
  content:"";position:absolute;right:64px;bottom:-26px;width:64px;height:64px;
  border-radius:16px;background:rgba(255,107,74,.12);
}
.hud-head{display:flex;align-items:center;gap:10px;margin-bottom:22px;position:relative;z-index:2}
.hud-head span{
  font-size:12.5px;font-weight:700;letter-spacing:.08em;color:#7BE7D8;
  border:1px solid rgba(0,194,168,.35);border-radius:8px;padding:4px 10px;
}
.hud-head h3{font-size:17px;font-weight:700;color:#fff}
.hud-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;position:relative;z-index:2}
.hud-item{border-left:2px solid rgba(0,194,168,.5);padding-left:14px}
.hud-item .val{font-size:24px;font-weight:800;color:#4DE3CD;letter-spacing:-.01em}
.hud-item .lbl{font-size:13.5px;color:#9FB1AE;margin-top:2px}

.mech-list{margin-top:8px;border-top:1px solid var(--line)}
.mech-item{
  display:grid;grid-template-columns:64px minmax(0,1fr);gap:16px;
  padding:18px 0;border-bottom:1px solid var(--line);align-items:start;
}
.mech-item .tag{
  font-size:12.5px;font-weight:700;color:var(--brand);
  background:var(--brand-soft);border-radius:8px;padding:4px 0;text-align:center;
}
.mech-item h4{font-size:16.5px;font-weight:700;color:var(--ink);margin-bottom:4px}
.mech-item p{font-size:15px;margin-bottom:0}

/* ---------- topic rows ---------- */
.topic-row{
  display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);
  gap:28px;align-items:center;margin-top:28px;
}
.topic-row.reverse{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr)}
.topic-row img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);background:var(--bg-soft);
}
.topic-row.reverse img{order:2}
.topic-row h3{font-size:19px;font-weight:700;color:var(--ink);margin-bottom:10px}
.topic-row p{font-size:15.5px;margin-bottom:14px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:700;color:var(--brand-strong);
  background:var(--brand-soft);border-radius:8px;padding:4px 10px;margin-bottom:10px;
}
.badge.accent{color:#C74A2E;background:var(--accent-soft)}

/* ---------- flow ---------- */
.flow{position:relative;margin-top:28px;padding-left:30px}
.flow::before{
  content:"";position:absolute;left:7px;top:8px;bottom:14px;width:2px;
  background:linear-gradient(180deg,var(--brand),var(--line));
}
.flow-step{position:relative;padding-bottom:26px}
.flow-step:last-child{padding-bottom:0}
.flow-step::before{
  content:"";position:absolute;left:-30px;top:6px;width:16px;height:16px;border-radius:50%;
  background:#fff;border:3px solid var(--brand);box-shadow:0 0 0 4px rgba(0,194,168,.1);
}
.flow-step h3{font-size:17.5px;font-weight:700;color:var(--ink);margin-bottom:6px}
.flow-step p{font-size:15.5px;margin-bottom:0;max-width:700px}

/* ---------- spec list ---------- */
.spec-list{
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;margin-top:26px;
}
.spec-row{
  display:grid;grid-template-columns:190px minmax(0,1fr);gap:18px;
  padding:18px 22px;border-bottom:1px solid var(--line);background:#fff;
}
.spec-row:last-child{border-bottom:0}
.spec-row:nth-child(even){background:var(--bg-soft)}
.spec-row dt{font-weight:700;color:var(--ink);font-size:15.5px}
.spec-row dd{font-size:15.5px;color:var(--ink-2)}

/* ---------- FAQ ---------- */
.faq-list{margin-top:26px}
.faq-item{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:14px;background:#fff;
  margin-bottom:12px;transition:border-color .18s ease,box-shadow .18s ease;
}
.faq-item:hover{border-color:#CFDEDA;box-shadow:var(--shadow-1)}
.faq-item.open{border-color:var(--brand);box-shadow:var(--shadow-1)}
.faq-item.open::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--brand);
}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--ink);line-height:1.5;
}
.faq-q svg{flex-shrink:0;color:var(--ink-3);transition:transform .28s ease,color .18s ease}
.faq-item.open .faq-q svg{transform:rotate(180deg);color:var(--brand)}
.faq-a{
  max-height:0;overflow:hidden;
  padding:0 20px;
  font-size:15.5px;line-height:1.8;color:var(--ink-2);
  transition:max-height .3s ease,padding .3s ease;
}
.faq-item.open .faq-a{max-height:340px;padding-bottom:20px}

/* ---------- CTA ---------- */
.cta-panel{
  position:relative;overflow:hidden;
  background:var(--bg-deep);color:#fff;border-radius:var(--r-lg);
  padding:44px;margin-top:8px;
  display:grid;grid-template-columns:minmax(0,1.5fr) auto;gap:28px;align-items:center;
  border:1px solid rgba(255,255,255,.08);
}
.cta-panel::after{
  content:"";position:absolute;right:-30px;bottom:-40px;width:180px;height:180px;
  border-radius:32px;background:rgba(0,194,168,.12);
}
.cta-panel h2{font-size:clamp(22px,2.3vw,28px);font-weight:800;color:#fff;letter-spacing:-.01em;margin-bottom:10px;position:relative;z-index:2}
.cta-panel p{color:#A8BCB9;font-size:15.5px;max-width:620px;margin-bottom:0;position:relative;z-index:2}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative;z-index:2}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-deep);color:#A8BCB9;padding-top:64px;margin-top:96px}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;
  padding-bottom:40px;
}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo-text{color:#fff}
.footer-desc{font-size:14.5px;line-height:1.8;max-width:340px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:14px}
.footer-col a{
  position:relative;display:block;padding:6px 0;font-size:14.5px;
  transition:color .18s ease,padding-left .18s ease;
}
.footer-col a::before{
  content:"";position:absolute;left:0;top:50%;width:0;height:2px;
  background:var(--accent);transition:width .18s ease;transform:translateY(-50%);
}
.footer-col a:hover{color:#fff;padding-left:14px}
.footer-col a:hover::before{width:8px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;
  font-size:13.5px;color:#8FA4A1;
}
.tech{color:#7A8C8F}
.back-top{
  margin-left:auto;display:inline-flex;align-items:center;gap:6px;
  color:#A8BCB9;font-size:13.5px;transition:color .18s ease;
}
.back-top:hover{color:#fff}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{max-width:960px}
}
@media (max-width:1023px){
  .nav-toggle{display:flex}
  .nav-panel{
    position:fixed;left:0;right:0;top:68px;
    display:none;flex-direction:column;align-items:stretch;gap:16px;
    background:#fff;border-bottom:1px solid var(--line);
    padding:20px 24px 26px;box-shadow:var(--shadow-2);
    max-height:calc(100vh - 68px);overflow-y:auto;
  }
  .nav-panel.open{display:flex}
  .nav-links{flex-direction:column;align-items:stretch;margin-right:0;gap:4px}
  .nav-link{width:100%;padding:12px 14px;font-size:16px}
  .nav-link.active{background:var(--brand-soft)}
  .nav-link.active::after{display:none}
  .nav-search{width:100%}
  .nav-cta{width:100%}
  .layout{grid-template-columns:1fr;gap:30px;padding-top:40px;padding-bottom:64px}
  .anchor-nav{
    position:static;display:flex;gap:8px;overflow-x:auto;
    padding:12px;border-radius:14px;box-shadow:var(--shadow-1);
  }
  .anchor-nav h2{display:none}
  .anchor-nav a{
    flex-shrink:0;border-left:0;border:1px solid var(--line);
    padding:8px 14px;border-radius:999px;background:#fff;
  }
  .anchor-nav a.active{border-color:var(--brand)}
  .anchor-note{display:none}
  .band-sep{margin:40px 0 !important}
  .hud-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .site-footer{margin-top:64px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 16px}
  .banner-inner{padding:44px 0 40px}
  .banner-lead{font-size:15.5px}
  .banner-stats{gap:10px 22px}
  .banner-stats strong{font-size:18px}
  .feature-split{grid-template-columns:1fr;gap:20px}
  .feature-split img{aspect-ratio:16/10}
  .topic-row,.topic-row.reverse{grid-template-columns:1fr;gap:18px;margin-top:22px}
  .topic-row.reverse img{order:0}
  .entry{grid-template-columns:1fr;gap:6px}
  .entry .idx{padding-top:0}
  .mech-item{grid-template-columns:56px minmax(0,1fr);gap:12px}
  .hud{padding:24px}
  .spec-row{grid-template-columns:1fr;gap:6px;padding:16px 18px}
  .cta-panel{grid-template-columns:1fr;padding:30px 24px;gap:20px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1;min-width:140px}
  .faq-q{font-size:16px;padding:16px}
  .band-sep{padding:14px 16px;font-size:13.5px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .back-top{margin-left:0}
}
@media (max-width:520px){
  .page-banner img.banner-bg{opacity:.32}
  .hud-grid{grid-template-columns:1fr 1fr;gap:16px}
  .hud-item .val{font-size:21px}
  .logo-text{font-size:16px}
  .logo-mark{width:34px;height:34px}
  .flow{padding-left:26px}
  .flow-step::before{left:-26px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --brand:#00C2A8;
  --brand-strong:#00A38E;
  --brand-soft:#E6FAF7;
  --accent:#FF6B4A;
  --accent-soft:#FFEDE8;
  --ink:#0C1A1D;
  --ink-2:#3D4F52;
  --ink-3:#7A8C8F;
  --bg:#FFFFFF;
  --bg-soft:#F4F7F6;
  --bg-deep:#0C1A1D;
  --line:#E3EAE8;
  --success:#17B26A;
  --warning:#F5A623;
  --danger:#E5484D;
  --shadow-1:0 1px 2px rgba(12,26,29,.06);
  --shadow-2:0 8px 24px rgba(12,26,29,.08);
  --shadow-3:0 24px 48px rgba(12,26,29,.12);
  --r-btn:12px;
  --r-card:16px;
  --r-lg:24px;
  --r-badge:8px;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Inter","Sora","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.75;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:var(--brand);text-decoration:none}
button,input{font:inherit;color:inherit}
button{background:none;border:0}
h1,h2,h3,h4{color:var(--ink);margin:0;letter-spacing:-.02em;line-height:1.25}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-strong);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-1)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-outline-light{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.38)}
.btn-outline-light:hover{background:rgba(255,255,255,.16);border-color:#fff}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px}
.btn:disabled,.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--r-badge);font-size:12.5px;font-weight:600;
  background:var(--brand-soft);color:var(--brand-strong);
}
.badge-accent{background:var(--accent-soft);color:var(--accent)}
.badge-line{background:#fff;border:1px solid var(--line);color:var(--ink-2)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s ease,border-color .25s ease;
}
.site-header.scrolled{border-bottom-color:var(--line);box-shadow:var(--shadow-1)}
.nav-wrap{display:flex;align-items:center;gap:20px;height:68px;transition:height .25s ease}
.site-header.scrolled .nav-wrap{height:60px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:36px;height:36px;border-radius:11px;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:14px;font-weight:800;letter-spacing:.5px;
  box-shadow:0 6px 16px rgba(0,194,168,.28);
}
.logo-text{font-size:18px;font-weight:800;color:var(--ink);letter-spacing:-.01em}
.nav-toggle{
  display:none;width:40px;height:40px;margin-left:auto;border:1px solid var(--line);
  border-radius:10px;color:var(--ink);place-items:center;cursor:pointer;
}
.nav-panel{display:flex;align-items:center;gap:18px;margin-left:auto}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:9px 12px;font-size:15px;color:var(--ink-2);
  border-radius:8px;transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--brand);background:var(--brand-soft)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-search{
  display:flex;align-items:center;gap:8px;width:262px;height:40px;padding:0 12px;
  border:1px solid var(--line);border-radius:999px;background:var(--bg-soft);
  color:var(--ink-3);transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 4px rgba(0,194,168,.14)}
.nav-search input{flex:1;min-width:0;border:0;background:transparent;outline:none;font-size:14px}
.nav-search input::placeholder{color:var(--ink-3)}
.kbd{
  font-size:11px;padding:2px 6px;border:1px solid var(--line);border-radius:6px;
  background:#fff;color:var(--ink-3);flex-shrink:0;
}
.nav-cta{flex-shrink:0}

/* ---------- 页面首屏 ---------- */
.page-hero{
  position:relative;background:var(--bg-deep);color:#fff;
  padding:60px 0 68px;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.36;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,26,29,.62) 0%,rgba(12,26,29,.92) 100%);
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:rgba(255,255,255,.66);margin-bottom:18px;
}
.breadcrumb a{color:rgba(255,255,255,.82)}
.breadcrumb a:hover{color:#fff}
.breadcrumb span.sep{color:rgba(255,255,255,.4)}
.hero-tagline{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 12px;
  border-radius:999px;background:rgba(0,194,168,.16);border:1px solid rgba(0,194,168,.42);
  color:#7FE9DA;font-size:13px;font-weight:600;margin-bottom:20px;
}
.page-hero h1{
  color:#fff;font-size:clamp(30px,4.4vw,50px);line-height:1.15;font-weight:800;
  max-width:900px;margin:0 0 18px;
}
.page-hero .hero-sub{
  max-width:660px;font-size:17px;line-height:1.75;color:rgba(255,255,255,.78);margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:0;border-top:1px solid rgba(255,255,255,.16);
  padding-top:22px;
}
.hero-stats li{
  padding:0 26px;border-left:1px solid rgba(255,255,255,.16);
  font-size:13.5px;color:rgba(255,255,255,.68);
}
.hero-stats li:first-child{padding-left:0;border-left:0}
.hero-stats strong{
  display:block;font-size:22px;font-weight:800;color:var(--accent);letter-spacing:-.01em;
  line-height:1.2;margin-bottom:4px;
}

/* ---------- 标签条 ---------- */
.tabs-bar{
  position:sticky;top:68px;z-index:40;background:rgba(255,255,255,.96);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);
}
.tabs{display:flex;align-items:center;gap:10px;padding:14px 0;overflow-x:auto}
.tab{
  flex:0 0 auto;height:40px;padding:0 18px;border-radius:999px;
  border:1px solid var(--line);background:#fff;color:var(--ink-2);
  font-size:14.5px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:background .18s ease,color .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.tab:hover{border-color:var(--brand);color:var(--brand)}
.tab.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(0,194,168,.28)}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section.alt{background:var(--bg-soft)}
.section-head{max-width:760px;margin-bottom:44px}
.section-head.wide{max-width:860px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.1em;
  color:var(--brand-strong);margin-bottom:12px;
}
.section-head h2{font-size:clamp(26px,3.1vw,34px);margin-bottom:14px}
.section-head p{font-size:16.5px;color:var(--ink-2);margin:0}

/* ---------- 大图卡片矩阵 ---------- */
.matrix{display:grid;grid-template-columns:1fr 1fr .78fr;gap:24px;align-items:start}
.m-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.m-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(0,194,168,.35)}
.m-thumb{aspect-ratio:16/10;background:var(--bg-soft);overflow:hidden}
.m-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.m-card:hover .m-thumb img{transform:scale(1.03)}
.m-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.m-body h3{font-size:19px;font-weight:600;line-height:1.4;color:var(--ink);transition:color .18s ease}
.m-card:hover .m-body h3{color:var(--brand)}
.m-body p{margin:0;font-size:15px;color:var(--ink-2);line-height:1.72}
.m-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-3);
}
.m-foot .arrow{color:var(--brand);font-weight:600}
.matrix-side{display:grid;gap:24px;align-content:start}
.m-narrow{
  display:grid;grid-template-columns:96px 1fr;gap:16px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:14px;box-shadow:var(--shadow-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.m-narrow:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(0,194,168,.35)}
.n-thumb{aspect-ratio:1/1;border-radius:12px;overflow:hidden;background:var(--bg-soft)}
.n-thumb img{width:100%;height:100%;object-fit:cover}
.n-body h3{font-size:15px;font-weight:600;line-height:1.45;margin:8px 0 6px;color:var(--ink)}
.m-narrow:hover .n-body h3{color:var(--brand)}
.n-body .date{font-size:12.5px;color:var(--ink-3)}
.is-hidden{display:none !important}

/* ---------- 图文说明 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split-media{
  border-radius:var(--r-lg);overflow:hidden;aspect-ratio:16/11;
  box-shadow:var(--shadow-2);background:var(--bg-soft);
}
.split-media img{width:100%;height:100%;object-fit:cover}
.split-text h2{font-size:clamp(26px,3vw,32px);margin-bottom:16px}
.split-text > p{font-size:16.5px;color:var(--ink-2)}
.check-list{display:grid;gap:14px;margin-top:22px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--ink-2)}
.check-list .dot{
  flex:0 0 auto;width:22px;height:22px;border-radius:7px;background:var(--brand-soft);
  color:var(--brand-strong);display:grid;place-items:center;margin-top:3px;
  font-size:12px;font-weight:800;
}

/* ---------- 步骤路径 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--shadow-1);position:relative;
  transition:transform .22s ease,box-shadow .22s ease;
}
.step:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.step::before{
  content:"";position:absolute;top:0;left:24px;width:44px;height:3px;
  border-radius:0 0 3px 3px;background:var(--brand);
}
.step-num{font-size:13px;font-weight:800;letter-spacing:.14em;color:var(--accent);display:block;margin-bottom:10px}
.step h3{font-size:18px;font-weight:600;margin-bottom:10px}
.step p{font-size:14.5px;color:var(--ink-2);margin:0;line-height:1.7}

/* ---------- 对照面板 ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow-1);
}
.panel.is-recommend{
  border-color:rgba(0,194,168,.45);box-shadow:var(--shadow-2);
  background:linear-gradient(180deg,#fff 0%,#F7FFFD 100%);
}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.panel-head h3{font-size:19px;font-weight:600}
.panel-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:13px 0;border-bottom:1px dashed var(--line);font-size:15px;
}
.panel-row:last-child{border-bottom:0}
.panel-row .k{color:var(--ink-3)}
.panel-row .v{color:var(--ink);font-weight:600}
.panel-row .v.plus{color:var(--brand-strong)}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px;max-width:880px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(0,194,168,.35)}
.faq-item.open{border-color:rgba(0,194,168,.5);box-shadow:var(--shadow-2)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 24px;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
  cursor:pointer;
}
.faq-q svg{flex:0 0 auto;color:var(--ink-3);transition:transform .25s ease,color .25s ease}
.faq-item.open .faq-q svg{transform:rotate(180deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{
  padding:0 24px 22px 24px;font-size:15.5px;line-height:1.85;color:var(--ink-2);
}
.faq-item.open .faq-a-inner{
  border-left:3px solid var(--brand);margin-left:24px;padding-left:18px;
}

/* ---------- 转化区 ---------- */
.cta-panel{
  position:relative;overflow:hidden;background:var(--bg-deep);color:#fff;
  border-radius:var(--r-lg);padding:56px;
  display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
}
.cta-panel::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:26px 26px;
}
.cta-panel > *{position:relative;z-index:1}
.cta-panel h2{color:#fff;font-size:clamp(26px,3vw,32px);margin-bottom:14px}
.cta-panel p{color:rgba(255,255,255,.74);font-size:16px;margin:0}
.cta-note{display:flex;flex-wrap:wrap;gap:18px;margin-top:22px;font-size:13.5px;color:rgba(255,255,255,.62)}
.cta-note span{display:inline-flex;align-items:center;gap:7px}
.cta-note i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block}
.field{display:flex;gap:12px}
.field input{
  flex:1;min-width:0;height:48px;padding:0 16px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.26);background:rgba(255,255,255,.08);
  color:#fff;outline:none;transition:border-color .18s ease,box-shadow .18s ease;
}
.field input::placeholder{color:rgba(255,255,255,.5)}
.field input:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(0,194,168,.2)}
.form-tip{margin-top:12px;font-size:13px;color:rgba(255,255,255,.58)}
.form-msg{margin-top:10px;font-size:13.5px;color:#8DF0E2;display:none}
.form-msg.show{display:block}
.form-msg.error{color:#FFB4A6}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-deep);color:#A8BCB9;padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo-text{color:#fff}
.footer-desc{margin-top:16px;font-size:14.5px;line-height:1.8;max-width:330px;color:#A8BCB9}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-col a{
  position:relative;display:block;padding:6px 0 6px 0;color:#A8BCB9;font-size:14.5px;
  transition:color .18s ease,padding .18s ease;
}
.footer-col a:hover{color:#fff;padding-left:12px}
.footer-col a:hover::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:2px;height:14px;background:var(--accent);
}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  font-size:13.5px;color:#8FA5A2;
}
.back-top{display:inline-flex;align-items:center;gap:6px;color:#A8BCB9}
.back-top:hover{color:#fff}

/* ---------- 底部固定转化条 ---------- */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:50;height:64px;
  background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -8px 24px rgba(12,26,29,.08);
  transform:translateY(110%);transition:transform .3s ease;
}
.sticky-cta.show{transform:translateY(0)}
.sticky-cta .container{display:flex;align-items:center;gap:20px;height:64px}
.sticky-cta .phrase{font-size:15px;font-weight:600;color:var(--ink)}
.sticky-cta .trust{display:flex;gap:20px;font-size:13px;color:var(--ink-3);margin-left:auto}
.sticky-cta .close{
  width:32px;height:32px;border-radius:9px;border:1px solid var(--line);
  color:var(--ink-3);cursor:pointer;display:grid;place-items:center;
}
.sticky-cta .close:hover{color:var(--ink);border-color:var(--ink-3)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:960px}
  .split{gap:40px}
}
@media (max-width:1023px){
  .nav-wrap{height:64px}
  .nav-toggle{display:grid}
  .nav-panel{
    position:fixed;left:0;right:0;top:64px;bottom:auto;flex-direction:column;
    align-items:stretch;gap:14px;margin:0;padding:20px 24px 28px;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow-3);
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:opacity .22s ease,transform .22s ease;
  }
  .nav-panel.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-links{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{padding:12px 10px;font-size:16px}
  .nav-link.active::after{left:10px;right:auto;bottom:6px;width:20px}
  .nav-search{width:100%;order:-1}
  .nav-cta{width:100%;height:46px}
  .tabs-bar{top:64px}
  .matrix{grid-template-columns:1fr 1fr}
  .matrix-side{grid-column:1 / -1;grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:1fr 1fr}
  .compare{grid-template-columns:1fr}
  .cta-panel{grid-template-columns:1fr;padding:44px 36px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
  .section{padding:80px 0}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 16px}
  .section{padding:60px 0}
  .page-hero{padding:44px 0 52px}
  .page-hero h1{font-size:clamp(28px,7.4vw,34px)}
  .page-hero .hero-sub{font-size:15.5px}
  .hero-actions{gap:10px}
  .hero-actions .btn{flex:1 1 auto}
  .hero-stats{gap:16px 0}
  .hero-stats li{padding:0 16px;font-size:13px}
  .hero-stats li:first-child{padding-left:0}
  .hero-stats strong{font-size:19px}
  .matrix{grid-template-columns:1fr}
  .matrix-side{grid-column:auto;grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:26px}
  .steps{grid-template-columns:1fr}
  .cta-panel{padding:32px 22px;border-radius:18px}
  .field{flex-direction:column}
  .field .btn{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1 / -1}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .sticky-cta{height:56px}
  .sticky-cta .container{height:56px;gap:12px}
  .sticky-cta .phrase{font-size:13.5px}
  .sticky-cta .trust{display:none}
  .sticky-cta .btn{margin-left:auto;height:38px;padding:0 14px;font-size:14px}
  .m-narrow{grid-template-columns:80px 1fr}
}
@media (max-width:480px){
  .logo-text{font-size:16px}
  .section-head h2{font-size:24px}
  .faq-q{font-size:15.5px;padding:18px 18px}
  .faq-a-inner{padding:0 18px 18px}
  .faq-item.open .faq-a-inner{margin-left:18px;padding-left:14px}
  .footer-grid{grid-template-columns:1fr}
}