/* roulang page: index */
:root{
  --brand:#1B6BE0;
  --brand-dark:#1559BD;
  --brand-light:#E8F1FD;
  --accent:#FF6B35;
  --accent-dark:#EA5823;
  --teal:#10B8A0;
  --bg:#F5F8FC;
  --band:#EEF3FA;
  --dark:#0D1B2E;
  --dark-2:#16263D;
  --text:#101A2C;
  --muted:#55637A;
  --weak:#93A0B4;
  --border:#E3EAF3;
  --white:#FFFFFF;
  --img-bg:#E9EFF7;
  --r-card:14px;
  --r-panel:20px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,26,44,.05),0 8px 24px rgba(16,26,44,.06);
  --sh-2:0 4px 10px rgba(16,26,44,.08),0 16px 36px rgba(16,26,44,.10);
  --t:200ms ease;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"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);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;background:var(--img-bg)}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35;letter-spacing:.2px}
p{margin:0}
:focus-visible{outline:3px solid rgba(27,107,224,.35);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;line-height:1;border:1px solid transparent;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-dark);box-shadow:0 8px 20px rgba(27,107,224,.24)}
.btn-outline{background:#fff;color:var(--brand);border-color:#C6DBF7}
.btn-outline:hover{background:var(--brand-light);border-color:var(--brand)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark);box-shadow:0 8px 20px rgba(255,107,53,.26)}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.8)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- 徽章/标签 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;border-radius:var(--r-pill);font-size:13px;padding:5px 13px;line-height:1.5}
.badge-soft{background:var(--brand-light);color:var(--brand);font-weight:500}
.badge-outline{background:#fff;border:1px solid var(--border);color:var(--muted)}
.badge-accent{background:rgba(255,107,53,.12);color:var(--accent);font-weight:500}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--brand);color:#fff;font-size:13px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px}
.topbar-left{font-weight:500}
.topbar-mid{opacity:.85}
.topbar-right{display:flex;gap:18px;flex-shrink:0}
.topbar-right a{opacity:.92;transition:opacity var(--t)}
.topbar-right a:hover{opacity:1;text-decoration:underline}

/* ---------- 主导航 ---------- */
.mainnav{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--border);transition:box-shadow var(--t)}
.mainnav.is-stuck{box-shadow:0 6px 22px rgba(16,26,44,.08)}
.mainnav-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{position:relative;width:26px;height:26px;border-radius:8px;background:var(--brand);display:block;flex:0 0 26px}
.brand-mark i{position:absolute;left:7px;height:2px;border-radius:2px;background:#fff}
.brand-mark i:nth-child(1){top:8px;width:12px}
.brand-mark i:nth-child(2){top:12px;width:8px}
.brand-mark i:nth-child(3){top:16px;width:12px}
.brand-name{font-size:18px;font-weight:600;color:var(--text);white-space:nowrap}
.nav-list{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-link{position:relative;display:inline-block;padding:10px 13px;font-size:15px;color:var(--muted);transition:color var(--t)}
.nav-link::after{content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;border-radius:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform var(--t)}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.nav-cta{margin-left:10px;flex-shrink:0}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;background:#fff;border:1px solid var(--border);border-radius:12px;color:var(--text);font-size:17px}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
.nav-scrim{position:fixed;inset:0;z-index:75;background:rgba(13,27,46,.45);opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t)}
.nav-scrim.show{opacity:1;visibility:visible}

/* ---------- 锚点子条 ---------- */
.anchorbar{position:sticky;top:72px;z-index:55;background:rgba(255,255,255,.93);backdrop-filter:blur(6px);border-bottom:1px solid var(--border)}
.anchorbar-inner{display:flex;align-items:center;gap:14px;height:48px}
.anchor-scroll{display:flex;align-items:center;gap:2px;flex:1;overflow-x:auto;scrollbar-width:none}
.anchor-scroll::-webkit-scrollbar{display:none}
.anchor-link{position:relative;padding:6px 12px;font-size:14px;color:var(--muted);white-space:nowrap;border-radius:8px;transition:color var(--t),background var(--t)}
.anchor-link:hover{color:var(--brand);background:var(--brand-light)}
.anchor-link.active{color:var(--brand);font-weight:600}
.anchor-link.active::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;border-radius:2px;background:var(--brand)}
.anchor-cta{flex-shrink:0}

/* ---------- 首屏 ---------- */
.hero{position:relative;display:flex;align-items:center;min-height:620px;padding:64px 0 80px;background:#fff;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(27,107,224,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(27,107,224,.035) 1px,transparent 1px);
  background-size:56px 56px;
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:52px;align-items:center}
.hero-copy .badge{margin-bottom:18px}
.hero h1{font-size:44px;line-height:1.25;margin-bottom:16px}
.hero-sub{font-size:17px;color:var(--muted);margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-points{display:grid;gap:14px;max-width:520px}
.hero-points li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--muted)}
.hero-points li i{color:var(--brand);margin-top:6px;font-size:14px}
.hero-points strong{display:block;color:var(--text);font-weight:600;font-size:15px}
.hero-visual{position:relative}
.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-panel);box-shadow:var(--sh-1)}
.float-card{
  position:absolute;left:-18px;bottom:24px;display:flex;align-items:center;gap:9px;
  background:#fff;border-radius:12px;padding:11px 18px;font-size:14px;color:var(--text);
  box-shadow:var(--sh-2);
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(16,184,160,.16);flex:0 0 8px}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section--band{background:var(--band)}
section[id]{scroll-margin-top:140px}
.section-head{max-width:760px;margin-bottom:44px}
.section-head h2{font-size:30px;margin-bottom:12px}
.section-head p{color:var(--muted);font-size:16px}
.section-head.row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.more-link{color:var(--brand);font-size:15px;font-weight:500;white-space:nowrap;transition:opacity var(--t)}
.more-link:hover{opacity:.75}

/* ---------- 卡片 ---------- */
.card{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--sh-1);transition:transform var(--t),box-shadow var(--t),border-color var(--t)}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}

/* ---------- 卖点区 ---------- */
.feature-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:24px;align-items:stretch}
.feature-main{overflow:hidden;display:flex;flex-direction:column}
.feature-main img{width:100%;height:262px;object-fit:cover}
.fm-body{padding:28px 30px 32px;display:flex;flex-direction:column;gap:14px;flex:1}
.fm-body h3{font-size:21px}
.fm-body p{color:var(--muted);font-size:15px}
.tick-list{display:grid;gap:11px;margin-top:4px}
.tick-list li{display:flex;gap:10px;font-size:15px;color:var(--muted)}
.tick-list li i{color:var(--teal);margin-top:6px;font-size:13px}
.feature-side-list{display:grid;gap:24px}
.feature-side{padding:26px 28px;display:flex;gap:18px;align-items:flex-start}
.icon-box{width:46px;height:46px;flex:0 0 46px;border-radius:12px;background:var(--brand-light);color:var(--brand);display:grid;place-items:center;font-size:19px}
.feature-side h3{font-size:18px;margin-bottom:8px}
.feature-side p{font-size:15px;color:var(--muted)}

/* ---------- 流程区 ---------- */
.demo-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.steps{position:relative;padding-top:4px}
.steps::before{content:"";position:absolute;left:19px;top:18px;bottom:26px;width:1px;background:var(--border)}
.step{position:relative;padding-left:60px;padding-bottom:28px}
.step:last-child{padding-bottom:0}
.step-num{
  position:absolute;left:0;top:0;width:40px;height:40px;border-radius:12px;
  background:#fff;border:1px solid var(--border);display:grid;place-items:center;
  font-size:14px;font-weight:600;color:var(--muted);z-index:1;transition:all var(--t);
}
.step-body{padding-left:14px;border-left:3px solid transparent;transition:border-color var(--t)}
.step h3{font-size:18px;margin-bottom:6px}
.step p{font-size:15px;color:var(--muted)}
.step.is-active .step-num{background:var(--brand);border-color:var(--brand);color:#fff}
.step.is-active .step-body{border-left-color:var(--brand)}
.demo-visual{overflow:hidden;border-radius:var(--r-panel)}
.demo-visual img{width:100%;height:360px;object-fit:cover}
.demo-visual figcaption{padding:16px 22px;font-size:14px;color:var(--muted);border-top:1px solid var(--border)}

/* ---------- 证据区 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border:1px solid var(--border);border-radius:var(--r-panel);box-shadow:var(--sh-1);overflow:hidden}
.stat{padding:34px 22px;text-align:center;border-right:1px solid var(--border)}
.stat:last-child{border-right:0}
.stat-num{font-size:32px;font-weight:600;color:var(--brand);line-height:1.2}
.stat-label{margin-top:8px;font-size:14px;color:var(--muted)}
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:28px}
.quote{padding:28px 28px 24px}
.quote::before{content:"\201C";display:block;font-family:Georgia,serif;font-size:46px;line-height:.8;color:var(--brand);opacity:.28;margin-bottom:10px}
.quote p{font-size:15px;color:var(--text)}
.quote-source{margin-top:16px;font-size:13px;color:var(--weak)}

/* ---------- 方案区 ---------- */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.plan{padding:34px 28px 30px;display:flex;flex-direction:column;position:relative}
.plan.featured{border-color:var(--brand);box-shadow:0 10px 34px rgba(27,107,224,.14)}
.plan-tag{position:absolute;top:-13px;left:28px;background:var(--accent);color:#fff;font-size:12px;font-weight:500;padding:5px 13px;border-radius:var(--r-pill)}
.plan h3{font-size:20px;margin-bottom:8px}
.plan-desc{font-size:14px;color:var(--weak);margin-bottom:18px}
.plan-price{font-size:14px;color:var(--muted);margin-bottom:22px}
.plan-price strong{font-size:30px;font-weight:600;color:var(--accent);margin-right:4px;line-height:1}
.plan ul{display:grid;gap:12px;margin-bottom:28px;flex:1}
.plan li{display:flex;gap:10px;font-size:15px;color:var(--muted)}
.plan li i{color:var(--teal);font-size:13px;margin-top:6px}

/* ---------- 资讯区 ---------- */
.news-layout{display:grid;grid-template-columns:2fr 1fr;gap:32px;align-items:start}
.news-main{display:grid;gap:16px}
.news-hero{display:grid;grid-template-columns:40% 1fr;overflow:hidden}
.news-hero-img img{width:100%;height:100%;min-height:210px;object-fit:cover}
.news-hero-body{padding:26px 28px;display:flex;flex-direction:column;gap:12px;justify-content:center}
.news-hero-body h3{font-size:20px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-hero-body p{font-size:15px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:var(--weak)}
.news-row{display:flex;gap:18px;padding:16px;align-items:center}
.news-row img{width:160px;height:100px;flex:0 0 160px;object-fit:cover;border-radius:10px}
.news-row-body{display:flex;flex-direction:column;gap:8px;min-width:0}
.news-row-body h3{font-size:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row-body p{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-side{display:grid;gap:20px}
.side-card{padding:24px}
.side-card h3{font-size:17px;margin-bottom:16px}
.side-card li{display:flex;gap:10px;font-size:14px;color:var(--muted);margin-bottom:11px}
.side-card li i{color:var(--brand);font-size:13px;margin-top:6px}
.empty-state{text-align:center;padding:56px 24px;background:#fff;border:1px dashed var(--border);border-radius:var(--r-card);color:var(--weak)}
.empty-state i{font-size:26px;display:block;margin-bottom:14px}
.empty-state p{margin-bottom:18px;font-size:15px}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--r-card);overflow:hidden;transition:border-color var(--t),box-shadow var(--t)}
.faq-item.open{border-color:#C6DBF7;box-shadow:var(--sh-1)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 24px;background:none;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--text)}
.faq-q:hover{color:var(--brand)}
.faq-icon{flex:0 0 26px;width:26px;height:26px;border-radius:50%;background:var(--brand-light);color:var(--brand);display:grid;place-items:center;font-size:12px;transition:transform var(--t)}
.faq-item.open .faq-icon{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease}
.faq-a-inner{padding:0 24px 20px;font-size:15px;color:var(--muted);line-height:1.85}

/* ---------- CTA 带 ---------- */
.cta-band{position:relative;padding:64px 0;background:var(--dark);color:#fff;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;
}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:36px}
.cta-band h2{font-size:28px;margin-bottom:10px}
.cta-band p{font-size:15px;color:rgba(255,255,255,.72)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex-shrink:0}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:44px}
.footer-brand .brand-name{color:#fff}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:18px}
.footer-col li{margin-bottom:11px}
.footer-col a{color:rgba(255,255,255,.68);transition:color var(--t)}
.footer-col a:hover{color:#fff}
.footer-col span{color:rgba(255,255,255,.6)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:rgba(255,255,255,.5)}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 24px;border-radius:var(--r-pill);
  background:var(--brand);color:#fff;font-size:15px;font-weight:500;
  box-shadow:0 10px 28px rgba(27,107,224,.34);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity 240ms ease,transform 240ms ease,visibility 240ms ease,background var(--t);
}
.float-cta.show{opacity:1;visibility:visible;transform:none}
.float-cta:hover{background:var(--brand-dark)}
.float-cta.hide-near-footer{opacity:0;visibility:hidden}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .hero-grid{gap:40px}
}
@media (max-width:1023px){
  .mainnav-inner{height:60px}
  .anchorbar{top:60px}
  .nav-toggle{display:inline-flex}
  .nav-cta{display:none}
  .nav-list{
    position:fixed;top:0;right:0;bottom:0;width:min(86vw,360px);z-index:80;
    display:flex;flex-direction:column;align-items:stretch;gap:4px;
    background:#fff;padding:88px 24px 32px;overflow-y:auto;
    box-shadow:-16px 0 44px rgba(16,26,44,.16);
    transform:translateX(102%);transition:transform 260ms ease;
  }
  .nav-list.open{transform:translateX(0)}
  .nav-link{padding:14px 12px;font-size:16px;border-radius:10px}
  .nav-link::after{display:none}
  .nav-link:hover{background:var(--brand-light)}
  .nav-link.active{background:var(--brand-light)}
  .hero{min-height:auto;padding:52px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:34px}
  .float-card{left:14px}
  .section{padding:64px 0}
  .section-head{margin-bottom:34px}
  .feature-grid{grid-template-columns:1fr}
  .demo-grid{grid-template-columns:1fr;gap:36px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(odd){border-right:1px solid var(--border)}
  .stat:nth-child(even){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--border)}
  .quotes{grid-template-columns:1fr}
  .plans{grid-template-columns:1fr;gap:28px}
  .news-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .cta-inner{flex-direction:column;align-items:flex-start;gap:26px}
  .cta-band h2{font-size:24px}
}
@media (max-width:767px){
  body{font-size:15px}
  .container{padding:0 16px}
  .topbar-mid{display:none}
  .topbar-inner{height:34px;font-size:12px}
  .brand-name{font-size:16px}
  .anchorbar-inner{height:44px;gap:10px}
  .hero{padding:40px 0 54px}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15px;margin-bottom:22px}
  .hero-actions .btn{flex:1 1 100%}
  .hero-visual img{aspect-ratio:16/11}
  .section{padding:48px 0}
  .section-head h2{font-size:22px}
  .section-head.row{flex-direction:column;align-items:flex-start;gap:12px}
  .fm-body{padding:22px 20px 26px}
  .feature-side{padding:22px 20px}
  .demo-visual img{height:230px}
  .stat{padding:26px 16px}
  .stat-num{font-size:26px}
  .plan{padding:28px 20px 24px}
  .news-hero{grid-template-columns:1fr}
  .news-hero-img img{min-height:180px;height:180px}
  .news-hero-body{padding:22px 20px}
  .news-row{padding:14px;gap:14px;align-items:flex-start}
  .news-row img{width:112px;height:84px;flex:0 0 112px}
  .news-row-body p{display:none}
  .faq-q{padding:18px 18px;font-size:15px}
  .faq-a-inner{padding:0 18px 18px}
  .cta-band{padding:52px 0}
  .footer-grid{grid-template-columns:1fr;padding-bottom:32px}
  .footer-desc{max-width:none}
  .float-cta{
    right:0;left:0;bottom:0;height:auto;padding:0 16px calc(12px + env(safe-area-inset-bottom));
    border-radius:0;background:transparent;box-shadow:none;transform:none;
  }
  .float-cta.show{transform:none}
  .float-cta::before{
    content:"";position:absolute;left:0;right:0;bottom:0;top:-20px;
    background:linear-gradient(180deg,rgba(245,248,252,0),rgba(245,248,252,.92) 42%);
    z-index:-1;
  }
  .float-cta .float-btn{
    display:flex;align-items:center;justify-content:center;gap:8px;width:100%;height:50px;
    border-radius:12px;background:var(--brand);color:#fff;font-size:15px;font-weight:500;
    box-shadow:0 8px 24px rgba(27,107,224,.3);
  }
  .float-cta .float-btn:active{background:var(--brand-dark)}
}

/* roulang page: article */
:root{
  --blue:#1B6BE0;
  --blue-deep:#1559BD;
  --blue-soft:#E8F0FD;
  --orange:#FF6B35;
  --orange-deep:#E85A26;
  --teal:#10B8A0;
  --bg:#F5F8FC;
  --bg-alt:#EEF3FA;
  --white:#FFFFFF;
  --dark:#0D1B2E;
  --ink:#101A2C;
  --muted:#55637A;
  --weak:#93A0B4;
  --line:#E3EAF3;
  --holder:#E9EFF7;
  --r-card:14px;
  --r-panel:20px;
  --r-btn:10px;
  --r-pill:999px;
  --sh:0 1px 2px rgba(16,26,44,.05), 0 8px 24px rgba(16,26,44,.06);
  --sh-hover:0 4px 10px rgba(16,26,44,.08), 0 16px 36px rgba(16,26,44,.10);
  --tr:200ms ease;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;background:var(--holder)}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;cursor:pointer}
input,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:3px solid rgba(27,107,224,.35);outline-offset:2px;border-radius:6px}

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

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--blue);color:#fff;font-size:13px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px}
.topbar-left{font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-mid{color:rgba(255,255,255,.86);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:18px;flex-shrink:0}
.topbar-right a{color:#fff;opacity:.92;transition:opacity var(--tr)}
.topbar-right a:hover{opacity:1;text-decoration:underline}

/* ---------- 主导航 ---------- */
.mainnav{
  position:sticky;top:0;z-index:120;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--tr);
}
.mainnav.is-stuck{box-shadow:0 6px 20px rgba(16,26,44,.07)}
.mainnav-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:26px;height:26px;border-radius:8px;background:var(--blue);
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  box-shadow:0 4px 10px rgba(27,107,224,.28);
}
.brand-mark i{display:block;height:2px;width:13px;border-radius:2px;background:#fff}
.brand-mark i:nth-child(2){width:9px;align-self:flex-start;margin-left:6.5px;opacity:.85}
.brand-mark i:nth-child(3){width:11px}
.brand-name{font-size:18px;font-weight:600;letter-spacing:.2px;color:var(--ink);white-space:nowrap}
.nav-list{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;display:inline-block;padding:10px 14px;font-size:15px;font-weight:500;
  color:var(--muted);border-radius:8px;transition:color var(--tr),background var(--tr);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--blue);transform:scaleX(0);transform-origin:left;transition:transform var(--tr);
}
.nav-link:hover{color:var(--blue);background:var(--blue-soft)}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1)}
.nav-link.active{color:var(--blue);font-weight:600}
.nav-cta{flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:#fff;color:var(--ink);font-size:18px;margin-left:auto;
}
.nav-toggle:hover{background:var(--bg-alt)}
.nav-scrim{
  display:none;position:fixed;inset:0;background:rgba(13,27,46,.45);
  opacity:0;transition:opacity var(--tr);z-index:130;
}
.nav-scrim.show{display:block;opacity:1}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:0 22px;height:46px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;transition:background var(--tr),color var(--tr),border-color var(--tr),transform var(--tr),box-shadow var(--tr);
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 6px 16px rgba(27,107,224,.22)}
.btn-primary:hover{background:var(--blue-deep);box-shadow:0 8px 20px rgba(27,107,224,.28)}
.btn-accent{background:var(--orange);color:#fff;box-shadow:0 6px 16px rgba(255,107,53,.24)}
.btn-accent:hover{background:var(--orange-deep)}
.btn-outline{background:#fff;color:var(--blue);border-color:rgba(27,107,224,.35)}
.btn-outline:hover{background:var(--blue-soft);border-color:var(--blue)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}

/* ---------- 文章头部 ---------- */
.article-hero{position:relative;background:linear-gradient(180deg,var(--bg-alt) 0%,var(--bg) 100%);border-bottom:1px solid var(--line);padding:34px 0 36px;overflow:hidden}
.article-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(27,107,224,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(27,107,224,.045) 1px,transparent 1px);
  background-size:46px 46px;
}
.article-hero .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--weak);margin-bottom:18px}
.breadcrumb a{color:var(--muted);transition:color var(--tr)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb span.sep{color:#C6D2E2}
.breadcrumb .current{color:var(--ink);font-weight:500;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{
  font-size:clamp(26px,3.4vw,38px);line-height:1.3;font-weight:700;letter-spacing:.2px;
  max-width:900px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;margin-top:20px;font-size:13.5px;color:var(--muted)}
.meta-row span{display:inline-flex;align-items:center;gap:7px}
.meta-row i{color:var(--blue);font-size:13px}
.meta-chip{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--blue-soft);color:var(--blue);font-size:13px;font-weight:600;
}

/* ---------- 正文 ---------- */
.article-section{padding:56px 0 72px}
.article-wrap{max-width:800px;margin:0 auto}
.article-paper{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-panel);
  box-shadow:var(--sh);padding:44px 52px 48px;
}
.article-body{font-size:16px;line-height:1.9;color:var(--ink);word-wrap:break-word}
.article-body p{margin:0 0 18px}
.article-body h2{
  font-size:24px;line-height:1.45;font-weight:600;margin:40px 0 16px;
  padding-left:14px;border-left:4px solid var(--blue);border-radius:2px;
}
.article-body h3{font-size:19px;font-weight:600;margin:32px 0 12px;color:var(--ink)}
.article-body h4{font-size:17px;font-weight:600;margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:24px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:8px}
.article-body li::marker{color:var(--blue)}
.article-body a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--blue-deep)}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--blue-soft);
  border-left:3px solid var(--blue);border-radius:0 10px 10px 0;color:var(--muted);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:22px auto;background:var(--holder)}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--weak);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;display:table}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--bg-alt);font-weight:600}
.article-body tr:nth-child(even) td{background:#FBFCFE}
.article-body code{background:var(--bg-alt);padding:2px 6px;border-radius:6px;font-size:14px;color:var(--blue-deep)}
.article-body pre{background:var(--bg-alt);padding:16px;border-radius:12px;overflow-x:auto;margin:20px 0}
.article-body pre code{background:none;padding:0;color:var(--ink)}
.article-body hr{border:none;border-top:1px solid var(--line);margin:32px 0}
.article-body > *:first-child{margin-top:0}

/* 文末标签 */
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:36px;padding-top:24px;border-top:1px solid var(--line)}
.tag-row .tag-label{font-size:13px;color:var(--weak)}
.tag{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--bg-alt);color:var(--muted);font-size:13.5px;border:1px solid var(--line);
  transition:color var(--tr),background var(--tr),border-color var(--tr);
}
.tag:hover{color:var(--blue);background:var(--blue-soft);border-color:rgba(27,107,224,.3)}

/* 空态 */
.article-empty{text-align:center;padding:34px 12px 12px}
.article-empty i{font-size:40px;color:#C6D2E2}
.article-empty h2{font-size:22px;font-weight:600;margin:16px 0 10px}
.article-empty p{color:var(--muted);margin-bottom:24px}

/* 返回条 */
.back-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:24px}
.back-link{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-weight:600;font-size:15px}
.back-link:hover{color:var(--blue-deep)}
.back-link i{transition:transform var(--tr)}
.back-link:hover i{transform:translateX(-3px)}
.hint-text{font-size:13.5px;color:var(--weak)}

/* ---------- 继续了解 ---------- */
.more-section{padding:8px 0 72px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px}
.section-head h2{font-size:26px;font-weight:600;letter-spacing:.2px}
.section-head p{font-size:14.5px;color:var(--muted);margin-top:8px}
.section-more{font-size:14.5px;font-weight:600;color:var(--blue);display:inline-flex;align-items:center;gap:6px;flex-shrink:0}
.section-more:hover{color:var(--blue-deep)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh);transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
  display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#D6E2F2}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--holder)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;font-weight:600;line-height:1.5}
.card-body p{font-size:14.5px;color:var(--muted);line-height:1.75}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:6px}
.card-foot .go{font-size:14px;font-weight:600;color:var(--blue);display:inline-flex;align-items:center;gap:6px}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;background:var(--blue-soft);color:var(--blue);
}
.badge-teal{background:rgba(16,184,160,.12);color:#0B8E7B}
.badge-orange{background:rgba(255,107,53,.12);color:#D9551F}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;background:var(--dark);color:#fff;padding:64px 0;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  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:42px 42px;
}
.cta-inner{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:28px;font-weight:600;letter-spacing:.2px}
.cta-inner p{color:rgba(255,255,255,.72);font-size:15px;margin-top:10px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:110;
  display:inline-flex;align-items:center;gap:9px;height:50px;padding:0 22px;border-radius:var(--r-pill);
  background:var(--blue);color:#fff;font-weight:600;font-size:15px;
  box-shadow:0 12px 28px rgba(27,107,224,.35);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity var(--tr),transform var(--tr),visibility var(--tr),background var(--tr);
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--blue-deep)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.78);padding:64px 0 0;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
.footer-brand .brand-name{color:#fff}
.footer-desc{margin-top:16px;line-height:1.85;color:rgba(255,255,255,.62);max-width:320px;font-size:14px}
.footer-col h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.3px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a,.footer-col span{color:rgba(255,255,255,.68);transition:color var(--tr)}
.footer-col a:hover{color:#fff}
.footer-bottom{
  margin-top:48px;padding:22px 0;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .nav-link{padding:10px 10px;font-size:14.5px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:920px){
  .topbar-mid{display:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
  .nav-list{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);z-index:140;
    background:#fff;flex-direction:column;align-items:stretch;gap:6px;
    padding:84px 22px 32px;margin:0;overflow-y:auto;
    box-shadow:-16px 0 40px rgba(16,26,44,.16);
    transform:translateX(102%);transition:transform 240ms ease;
  }
  .nav-list.open{transform:translateX(0)}
  .nav-link{padding:14px 12px;font-size:16px;border-radius:10px}
  .nav-link::after{display:none}
  .nav-link.active{background:var(--blue-soft)}
  .nav-cta{display:none}
  .article-paper{padding:32px 26px 36px}
  .article-section{padding:40px 0 56px}
  .cta-inner h2{font-size:24px}
}
@media (max-width:760px){
  .container{padding:0 16px}
  .mainnav-inner{height:60px}
  .brand-name{font-size:16.5px}
  .article-hero{padding:26px 0 28px}
  .article-title{font-size:24px}
  .article-body{font-size:15.5px;line-height:1.85}
  .article-body h2{font-size:20px;margin-top:32px}
  .article-body h3{font-size:17.5px}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .card-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start;gap:10px}
  .cta-band{padding:48px 0}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1}
  .float-cta{
    right:0;left:0;bottom:0;width:100%;height:56px;border-radius:0;
    justify-content:center;padding:0 16px;
    padding-bottom:env(safe-area-inset-bottom);
    box-shadow:0 -8px 24px rgba(16,26,44,.18);
  }
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .article-paper{padding:26px 20px 30px;border-radius:16px}
  .back-row{flex-direction:column;align-items:flex-start;gap:12px}
}

/* roulang page: category1 */
:root{
  --primary:#1B6BE0;
  --primary-dark:#1557BB;
  --primary-soft:#E7F0FE;
  --accent:#FF6B35;
  --accent-dark:#E85A26;
  --mint:#10B8A0;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --alt:#EEF3FA;
  --dark:#0D1B2E;
  --text:#101A2C;
  --text2:#55637A;
  --text3:#93A0B4;
  --border:#E3EAF3;
  --r-card:14px;
  --r-lg:20px;
  --r-btn:10px;
  --r-pill:999px;
  --sh:0 1px 2px rgba(16,26,44,.05), 0 8px 24px rgba(16,26,44,.06);
  --sh-hover:0 4px 10px rgba(16,26,44,.08), 0 16px 36px rgba(16,26,44,.10);
  --t:200ms ease;
  --container:1200px;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;background:#E9EFF7;}
a{color:var(--primary);text-decoration:none;transition:color var(--t);}
a:hover{color:var(--primary-dark);}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:600;}
p{margin:0;}
:focus-visible{outline:3px solid rgba(27,107,224,.35);outline-offset:2px;}

.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section-alt{background:var(--alt);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-title{font-size:30px;letter-spacing:-.2px;}
.section-sub{margin-top:14px;color:var(--text2);font-size:16px;}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--primary);background:var(--primary-soft);border-radius:var(--r-pill);padding:5px 14px;margin-bottom:16px;}
.eyebrow i{font-size:12px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);border:1px solid transparent;
  font-weight:600;font-size:15px;line-height:1;
  padding:14px 24px;min-height:46px;
  transition:background-color var(--t),color var(--t),border-color var(--t),box-shadow var(--t),transform 120ms ease;
  white-space:nowrap;
}
.btn-sm{padding:10px 18px;min-height:38px;font-size:14px;}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(27,107,224,.22);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;}
.btn-primary:active{transform:translateY(1px);box-shadow:0 3px 8px rgba(27,107,224,.22);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,107,53,.26);}
.btn-accent:hover{background:var(--accent-dark);color:#fff;}
.btn-accent:active{transform:translateY(1px);}
.btn-outline{background:transparent;color:var(--primary);border-color:rgba(27,107,224,.45);}
.btn-outline:hover{background:var(--primary-soft);color:var(--primary-dark);border-color:var(--primary);}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6);}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.55;cursor:not-allowed;}

/* 顶部信息条 */
.topbar{background:var(--primary);color:#fff;font-size:13px;height:36px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px;}
.topbar-left{font-weight:600;letter-spacing:.2px;white-space:nowrap;}
.topbar-mid{color:rgba(255,255,255,.85);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-right{display:flex;align-items:center;gap:16px;white-space:nowrap;}
.topbar-right a{color:#fff;font-weight:500;}
.topbar-right a:hover{color:#fff;text-decoration:underline;}

/* 主导航 */
.mainnav{
  background:#fff;border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:60;
  transition:box-shadow var(--t);
}
.mainnav.scrolled{box-shadow:0 6px 20px rgba(16,26,44,.08);}
.mainnav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:36px;height:36px;border-radius:11px;flex:none;
  background:linear-gradient(135deg,#2A7CF0,#1557BB);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  box-shadow:0 4px 12px rgba(27,107,224,.28);
}
.brand-mark i{display:block;width:16px;height:2px;border-radius:2px;background:#fff;opacity:.92;}
.brand-mark i:nth-child(2){width:10px;opacity:.7;}
.brand-name{font-size:18px;font-weight:600;color:var(--text);letter-spacing:.2px;}
.brand:hover .brand-name{color:var(--primary);}
.nav-list{display:flex;align-items:center;gap:6px;}
.nav-link{
  position:relative;display:inline-block;padding:10px 12px;
  color:var(--text2);font-size:15px;font-weight:500;border-radius:8px;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--primary);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform 220ms ease;
}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--primary);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.nav-cta{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--border);
  background:#fff;color:var(--text);align-items:center;justify-content:center;font-size:18px;
}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary);}
.nav-scrim{
  position:fixed;inset:0;background:rgba(13,27,46,.45);
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);z-index:70;
}
.nav-scrim.show{opacity:1;visibility:visible;}

/* 内页 banner */
.page-banner{
  position:relative;color:#fff;
  background:linear-gradient(rgba(27,107,224,.55),rgba(13,27,46,.68)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  min-height:280px;display:flex;align-items:flex-end;
  padding:56px 0 48px;
}
.page-banner::after{
  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:48px 48px;pointer-events:none;
}
.banner-inner{position:relative;z-index:2;max-width:840px;}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.82);margin-bottom:18px;flex-wrap:wrap;}
.breadcrumb a{color:rgba(255,255,255,.9);}
.breadcrumb a:hover{color:#fff;text-decoration:underline;}
.breadcrumb span.sep{opacity:.6;}
.banner-title{font-size:40px;line-height:1.25;color:#fff;letter-spacing:-.4px;}
.banner-lead{margin-top:16px;font-size:17px;line-height:1.8;color:rgba(255,255,255,.9);max-width:680px;}
.banner-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);
  color:#fff;font-size:13px;font-weight:500;padding:6px 14px;border-radius:var(--r-pill);
  backdrop-filter:blur(2px);
}
.chip i{font-size:12px;}

/* 侧栏布局 */
.layout-side{display:grid;grid-template-columns:272px minmax(0,1fr);gap:36px;align-items:start;}
.side-rail{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.rail-card{background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);box-shadow:var(--sh);padding:22px;}
.rail-title{font-size:14px;font-weight:600;color:var(--text3);letter-spacing:.6px;text-transform:uppercase;margin-bottom:14px;}
.rail-nav{display:flex;flex-direction:column;gap:2px;}
.rail-nav a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:10px;color:var(--text2);font-size:15px;font-weight:500;
  border-left:3px solid transparent;transition:background var(--t),color var(--t),border-color var(--t);
}
.rail-nav a i{font-size:12px;color:var(--text3);}
.rail-nav a:hover{background:var(--primary-soft);color:var(--primary);}
.rail-nav a.is-active{background:var(--primary-soft);color:var(--primary);border-left-color:var(--primary);font-weight:600;}
.rail-tags{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--alt);color:var(--text2);border:1px solid var(--border);
  border-radius:var(--r-pill);padding:6px 13px;font-size:13px;font-weight:500;
  transition:background var(--t),color var(--t),border-color var(--t);
}
.tag:hover{background:var(--primary-soft);color:var(--primary);border-color:rgba(27,107,224,.35);}
.tag-mint{background:rgba(16,184,160,.1);color:#0B8C7A;border-color:rgba(16,184,160,.28);}
.rail-status{display:flex;align-items:center;gap:9px;font-size:14px;color:var(--text2);margin-bottom:14px;}
.dot{width:9px;height:9px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 4px rgba(16,184,160,.16);flex:none;}
.rail-card h3{font-size:17px;margin-bottom:10px;}
.rail-card p{font-size:14px;color:var(--text2);line-height:1.75;margin-bottom:16px;}
.rail-figure{border-radius:12px;overflow:hidden;margin-bottom:16px;}

/* 入口卡片网格 */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.entry-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh);overflow:hidden;display:flex;flex-direction:column;
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.entry-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#D5E1F1;}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#E9EFF7;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease;}
.entry-card:hover .card-media img{transform:scale(1.03);}
.card-media .card-badge{
  position:absolute;left:14px;top:14px;
  background:rgba(13,27,46,.72);color:#fff;font-size:12px;font-weight:600;
  padding:5px 12px;border-radius:var(--r-pill);
}
.card-body{padding:22px;display:flex;flex-direction:column;flex:1;gap:12px;}
.card-title{font-size:20px;}
.card-desc{color:var(--text2);font-size:15px;line-height:1.8;}
.card-meta{display:flex;flex-wrap:wrap;gap:8px;}
.card-link{
  margin-top:auto;display:inline-flex;align-items:center;gap:8px;
  font-weight:600;font-size:15px;color:var(--primary);
}
.card-link i{transition:transform var(--t);font-size:13px;}
.card-link:hover i{transform:translateX(3px);}

/* 流程 */
.steps{display:flex;flex-direction:column;gap:0;}
.step{
  position:relative;display:grid;grid-template-columns:64px minmax(0,1fr);gap:20px;
  padding:22px 24px 22px 0;border-left:3px solid transparent;
  transition:border-color var(--t),background var(--t);
  border-radius:0 12px 12px 0;
}
.step + .step{border-top:1px solid var(--border);}
.step:hover,.step.is-active{border-left-color:var(--primary);background:#fff;}
.step-num{
  width:56px;height:56px;border-radius:16px;flex:none;
  background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:700;letter-spacing:.5px;
}
.step:hover .step-num,.step.is-active .step-num{background:var(--primary);color:#fff;}
.step-body h3{font-size:19px;margin-bottom:8px;}
.step-body p{color:var(--text2);font-size:15px;}

/* 数据条 */
.stats{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);
  box-shadow:var(--sh);display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  overflow:hidden;
}
.stat{padding:32px 26px;text-align:center;border-right:1px solid var(--border);}
.stat:last-child{border-right:0;}
.stat-num{font-size:32px;font-weight:600;color:var(--primary);line-height:1.2;letter-spacing:-.5px;}
.stat-num small{font-size:15px;font-weight:600;margin-left:4px;color:var(--text2);}
.stat-label{margin-top:8px;font-size:14px;color:var(--text2);}

/* 引用卡 */
.quotes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:28px;}
.quote{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh);padding:26px;position:relative;
}
.quote i.q{color:rgba(27,107,224,.22);font-size:26px;margin-bottom:12px;display:block;}
.quote-text{font-size:15px;color:var(--text);line-height:1.8;}
.quote-from{margin-top:16px;font-size:13px;color:var(--text3);display:flex;align-items:center;gap:8px;}
.quote-from span.pill{background:var(--alt);border-radius:var(--r-pill);padding:3px 11px;color:var(--text2);font-weight:500;}

/* 终端对照 */
.compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.compare-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh);padding:28px;display:flex;flex-direction:column;gap:14px;
  transition:transform var(--t),box-shadow var(--t);
}
.compare-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);}
.compare-head{display:flex;align-items:center;gap:12px;}
.compare-icon{
  width:44px;height:44px;border-radius:12px;background:var(--primary-soft);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;flex:none;
}
.compare-card h3{font-size:19px;}
.compare-list{display:flex;flex-direction:column;gap:10px;}
.compare-list li{display:flex;gap:10px;color:var(--text2);font-size:15px;line-height:1.75;}
.compare-list i{color:var(--mint);font-size:14px;margin-top:6px;}

/* 更新板块 */
.news-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.news-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh);overflow:hidden;display:grid;grid-template-columns:160px minmax(0,1fr);
  transition:transform var(--t),box-shadow var(--t);
}
.news-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);}
.news-card .news-media{background:#E9EFF7;overflow:hidden;}
.news-card .news-media img{width:100%;height:100%;object-fit:cover;min-height:132px;}
.news-body{padding:20px 22px;display:flex;flex-direction:column;gap:10px;}
.news-body h3{font-size:17px;line-height:1.5;}
.news-body p{font-size:14px;color:var(--text2);line-height:1.75;}
.news-meta{font-size:13px;color:var(--text3);display:flex;align-items:center;gap:10px;margin-top:auto;}

/* 页内 CTA */
.inline-cta{
  margin-top:28px;background:var(--card);border:1px dashed rgba(27,107,224,.4);
  border-radius:var(--r-lg);padding:26px 28px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
}
.inline-cta h3{font-size:19px;margin-bottom:6px;}
.inline-cta p{font-size:14px;color:var(--text2);}

/* 深色 CTA 带 */
.cta-band{
  position:relative;background:var(--dark);color:#fff;padding:64px 0;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;
}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;}
.cta-title{font-size:28px;color:#fff;}
.cta-sub{margin-top:12px;color:rgba(255,255,255,.78);font-size:16px;max-width:560px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;}
.faq-item{
  background:var(--card);border:1px solid var(--border);border-radius:var(--r-card);
  box-shadow:var(--sh);overflow:hidden;transition:border-color var(--t),box-shadow var(--t);
}
.faq-item:hover{border-color:#D5E1F1;}
.faq-item.open{border-color:rgba(27,107,224,.4);}
.faq-q{
  width:100%;background:none;border:0;text-align:left;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;font-size:16px;font-weight:600;color:var(--text);
}
.faq-q:hover{color:var(--primary);}
.faq-icon{
  width:28px;height:28px;border-radius:50%;flex:none;
  background:var(--alt);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:13px;
  transition:transform 220ms ease,background var(--t),color var(--t);
}
.faq-item.open .faq-icon{background:var(--primary);color:#fff;transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease;}
.faq-item.open .faq-a{max-height:400px;}
.faq-a-inner{padding:0 22px 22px;color:var(--text2);font-size:15px;line-height:1.85;}

/* 页脚 */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 28px;font-size:14px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;}
.footer-brand .brand-name{color:#fff;}
.footer-desc{margin-top:16px;line-height:1.85;color:rgba(255,255,255,.66);max-width:340px;}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#fff;}
.footer-col span{color:rgba(255,255,255,.6);}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:80;
  display:inline-flex;align-items:center;gap:9px;
  background:var(--primary);color:#fff;font-weight:600;font-size:15px;
  padding:14px 22px;border-radius:var(--r-pill);
  box-shadow:0 12px 30px rgba(27,107,224,.34);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity var(--t),visibility var(--t),transform var(--t),background var(--t);
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--primary-dark);color:#fff;}

/* 响应式 */
@media (max-width:1279px){
  .container{padding:0 20px;}
}
@media (max-width:1023px){
  .section{padding:64px 0;}
  .layout-side{grid-template-columns:1fr;gap:28px;}
  .side-rail{position:static;}
  .grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .quotes{grid-template-columns:1fr 1fr;}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));}
  .stat:nth-child(2){border-right:0;}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--border);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .banner-title{font-size:32px;}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex;}
  .nav-list{
    position:fixed;top:0;right:0;height:100vh;width:min(320px,86vw);
    background:#fff;flex-direction:column;align-items:stretch;gap:4px;
    padding:84px 22px 28px;z-index:75;
    transform:translateX(104%);transition:transform 240ms ease;
    box-shadow:-14px 0 40px rgba(13,27,46,.18);
    overflow-y:auto;
  }
  .nav-list.open{transform:translateX(0);}
  .nav-link{padding:14px 12px;font-size:16px;border-radius:10px;}
  .nav-link::after{display:none;}
  .nav-link.active{background:var(--primary-soft);}
  .nav-cta .btn{display:none;}
  .cta-inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  body{font-size:15px;}
  .section{padding:48px 0;}
  .container{padding:0 16px;}
  .topbar-mid{display:none;}
  .topbar-left{font-size:12px;}
  .brand-name{font-size:16px;}
  .banner-title{font-size:28px;}
  .banner-lead{font-size:15px;}
  .page-banner{padding:44px 0 36px;min-height:0;}
  .section-title{font-size:22px;}
  .grid-2,.compare,.news-grid,.quotes{grid-template-columns:1fr;}
  .news-card{grid-template-columns:1fr;}
  .news-card .news-media img{min-height:180px;aspect-ratio:16/9;}
  .stats{grid-template-columns:1fr;}
  .stat{border-right:0;border-bottom:1px solid var(--border);padding:24px 20px;}
  .stat:last-child{border-bottom:0;}
  .card-body{padding:20px;}
  .step{grid-template-columns:52px minmax(0,1fr);gap:16px;padding:18px 16px 18px 16px;}
  .step-num{width:48px;height:48px;font-size:16px;border-radius:14px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .float-cta{
    left:0;right:0;bottom:0;width:100%;border-radius:0;
    justify-content:center;padding:16px 16px calc(16px + env(safe-area-inset-bottom));
  }
  .faq-q{font-size:15px;padding:18px;}
  .faq-a-inner{padding:0 18px 18px;}
  .cta-title{font-size:22px;}
  .inline-cta{padding:22px 20px;}
  .btn-block-mobile{width:100%;}
}
@media (max-width:520px){
  .banner-chips{gap:8px;}
  .chip{font-size:12px;padding:5px 11px;}
  .btn{padding:13px 18px;font-size:14px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
}

/* roulang page: category2 */
:root{
  --brand:#1B6BE0;
  --brand-deep:#1457BC;
  --brand-soft:rgba(27,107,224,.08);
  --brand-line:rgba(27,107,224,.24);
  --accent:#FF6B35;
  --accent-deep:#E85C28;
  --teal:#10B8A0;
  --bg:#F5F8FC;
  --band:#EEF3FA;
  --surface:#FFFFFF;
  --ink:#101A2C;
  --muted:#55637A;
  --faint:#93A0B4;
  --line:#E3EAF3;
  --dark:#0D1B2E;
  --err:#E5484D;
  --placeholder:#E9EFF7;
  --r-card:14px;
  --r-panel:20px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,26,44,.05),0 8px 24px rgba(16,26,44,.06);
  --sh-2:0 4px 10px rgba(16,26,44,.08),0 16px 36px rgba(16,26,44,.10);
  --ease:200ms ease;
  --sec-y:88px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Inter",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),border-color var(--ease);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input,textarea,select{font:inherit;}
:focus-visible{outline:3px solid rgba(27,107,224,.42);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--brand);color:#fff;font-size:13px;line-height:36px;}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar-left{font-weight:600;letter-spacing:.02em;}
.topbar-mid{color:rgba(255,255,255,.78);}
.topbar-right{display:flex;align-items:center;gap:18px;}
.topbar-right a{color:#fff;border-bottom:1px solid rgba(255,255,255,.45);padding-bottom:1px;}
.topbar-right a:hover{color:#fff;border-color:#fff;}

/* ============ 主导航 ============ */
.site-header{position:relative;z-index:60;}
.mainnav{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow var(--ease);z-index:60;}
.mainnav.is-stuck{box-shadow:0 8px 22px rgba(16,26,44,.07);}
.mainnav-inner{display:flex;align-items:center;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:24px;height:24px;border-radius:8px;background:var(--brand);
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
}
.brand-mark i{display:block;height:2px;border-radius:2px;background:#fff;}
.brand-mark i:nth-child(1){width:12px;}
.brand-mark i:nth-child(2){width:9px;opacity:.85;}
.brand-mark i:nth-child(3){width:6px;opacity:.7;}
.brand-name{font-size:18px;font-weight:600;color:var(--ink);letter-spacing:.01em;white-space:nowrap;}
.nav-list{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-block;padding:10px 12px;font-size:15px;color:var(--muted);border-radius:8px;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.nav-cta{flex:0 0 auto;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  align-items:center;justify-content:center;color:var(--ink);font-size:18px;margin-left:auto;
  transition:background var(--ease),border-color var(--ease);
}
.nav-toggle:hover{background:var(--band);border-color:var(--brand-line);}
.nav-scrim{
  position:fixed;inset:0;background:rgba(13,27,46,.45);opacity:0;visibility:hidden;
  transition:opacity var(--ease),visibility var(--ease);z-index:80;
}
.nav-scrim.show{opacity:1;visibility:visible;}

/* ============ 锚点子条 ============ */
.anchorbar{
  position:sticky;top:72px;z-index:55;height:48px;
  background:rgba(255,255,255,.94);backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.anchorbar-inner{display:flex;align-items:center;gap:16px;height:48px;}
.anchor-scroll{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none;flex:1 1 auto;}
.anchor-scroll::-webkit-scrollbar{display:none;}
.anchor-link{
  position:relative;flex:0 0 auto;padding:8px 12px;font-size:14px;color:var(--muted);white-space:nowrap;border-radius:8px;
}
.anchor-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--brand);transform:scaleX(0);transition:transform var(--ease);}
.anchor-link:hover{color:var(--brand);background:var(--brand-soft);}
.anchor-link.active{color:var(--brand);font-weight:600;}
.anchor-link.active::after{transform:scaleX(1);}
.anchor-cta{flex:0 0 auto;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:500;white-space:nowrap;
  transition:background var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.btn i{font-size:14px;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px;}
.btn-lg{height:52px;padding:0 28px;font-size:16px;}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-deep);box-shadow:0 10px 22px rgba(27,107,224,.22);}
.btn-primary:active{transform:translateY(1px);}
.btn-accent{background:var(--accent);color:#fff;}
.btn-accent:hover{background:var(--accent-deep);box-shadow:0 10px 22px rgba(255,107,53,.26);}
.btn-accent:active{transform:translateY(1px);}
.btn-outline{background:#fff;border-color:var(--brand-line);color:var(--brand);}
.btn-outline:hover{background:var(--brand-soft);border-color:var(--brand);}
.btn-light{background:transparent;border-color:rgba(255,255,255,.5);color:#fff;}
.btn-light:hover{background:rgba(255,255,255,.14);border-color:#fff;}
.btn-block{width:100%;}

/* ============ 徽章与标签 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;
  border-radius:var(--r-pill);font-size:13px;font-weight:500;background:var(--band);color:var(--muted);
}
.badge-soft{background:var(--brand-soft);color:var(--brand);}
.badge-accent{background:rgba(255,107,53,.12);color:var(--accent-deep);}
.badge-teal{background:rgba(16,184,160,.12);color:#0B8C7A;}

/* ============ Banner 与面包屑 ============ */
.page-banner{
  position:relative;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  background-color:#123A70;overflow:hidden;
}
.page-banner::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(20,87,188,.72),rgba(13,27,46,.78));
}
.banner-inner{position:relative;z-index:2;padding:92px 24px 68px;max-width:1200px;}
.banner-badge{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.16);color:#fff;font-size:13px;font-weight:500;backdrop-filter:blur(2px);
}
.banner-title{
  margin-top:20px;font-size:40px;font-weight:700;line-height:1.25;color:#fff;max-width:820px;
}
.banner-sub{margin-top:14px;font-size:16px;color:rgba(255,255,255,.85);max-width:640px;}
.breadcrumb{display:flex;align-items:center;gap:10px;margin-top:26px;font-size:13px;color:rgba(255,255,255,.7);}
.breadcrumb a{color:rgba(255,255,255,.8);border-bottom:1px solid rgba(255,255,255,.3);}
.breadcrumb a:hover{color:#fff;border-color:#fff;}
.breadcrumb .current{color:#fff;font-weight:500;}

/* ============ 板块 ============ */
.section{padding:var(--sec-y) 0;}
.section-tight{padding:56px 0;}
.section-band{background:var(--band);}
.sec-head{max-width:740px;margin-bottom:40px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 12px;margin-bottom:14px;
  border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;
}
.sec-title{font-size:30px;}
.sec-sub{margin-top:12px;color:var(--muted);font-size:16px;}

/* ============ 数据条 ============ */
.stat-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
}
.stat{background:#fff;padding:26px 22px;}
.stat-num{display:block;font-size:32px;font-weight:600;line-height:1.1;color:var(--brand);}
.stat-label{display:block;margin-top:8px;font-size:15px;font-weight:500;color:var(--ink);}
.stat-desc{display:block;margin-top:4px;font-size:13px;color:var(--faint);}

/* ============ 卡片与网格 ============ */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-feature{display:grid;grid-template-columns:1.55fr 1fr;gap:24px;align-items:stretch;}
.stack{display:grid;gap:24px;}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-1);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
  overflow:hidden;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6E2F1;}
.card-body{padding:24px;}
.card-title{font-size:20px;}
.card-text{margin-top:10px;color:var(--muted);font-size:15px;}
.card-media{position:relative;aspect-ratio:16/9;background:var(--placeholder);overflow:hidden;}
.card-media img{width:100%;height:100%;object-fit:cover;}
.media-caption{padding:14px 24px 0;font-size:13px;color:var(--faint);}

.feature-main{display:flex;flex-direction:column;}
.feature-main .card-media{aspect-ratio:16/8;}
.point-list{margin-top:16px;display:grid;gap:10px;}
.point-list li{position:relative;padding-left:24px;font-size:15px;color:var(--muted);}
.point-list li::before{
  content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:50%;
  background:rgba(16,184,160,.16);border:2px solid var(--teal);
}
.mini-card{display:flex;gap:16px;padding:22px;align-items:flex-start;}
.mini-icon{
  flex:0 0 44px;width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand);font-size:17px;
}
.mini-card h3{font-size:17px;}
.mini-card p{margin-top:6px;font-size:14px;color:var(--muted);}

/* ============ 时间轴 ============ */
.timeline{position:relative;display:grid;gap:20px;max-width:980px;}
.tl-item{position:relative;display:grid;grid-template-columns:132px 1fr;gap:24px;align-items:start;}
.tl-item::before{
  content:"";position:absolute;left:65px;top:52px;bottom:-20px;width:2px;
  background:linear-gradient(180deg,var(--line),rgba(227,234,243,0));
}
.tl-item:last-child::before{display:none;}
.tl-marker{display:flex;flex-direction:column;align-items:center;gap:10px;padding-top:16px;}
.tl-index{font-size:22px;font-weight:600;color:var(--brand);letter-spacing:.04em;}
.tl-dot{
  width:12px;height:12px;border-radius:50%;background:#fff;border:2px solid var(--brand);
  box-shadow:0 0 0 5px rgba(27,107,224,.10);
}
.tl-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:26px 28px;
  box-shadow:var(--sh-1);transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.tl-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6E2F1;}
.tl-card h3{font-size:20px;}
.tl-card p{margin-top:10px;color:var(--muted);font-size:15px;}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}

/* ============ 场景卡 ============ */
.case-card{display:flex;gap:18px;padding:26px;align-items:flex-start;}
.case-icon{
  flex:0 0 48px;width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:rgba(255,107,53,.10);color:var(--accent-deep);font-size:18px;
}
.case-card h3{font-size:18px;}
.case-card p{margin-top:8px;font-size:15px;color:var(--muted);}
.case-card .badge{margin-top:14px;}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;background:var(--dark);color:#fff;overflow:hidden;
  padding:64px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.5;
  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:44px 44px;
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;}
.cta-title{font-size:26px;color:#fff;}
.cta-text{margin-top:10px;color:rgba(255,255,255,.75);font-size:15px;max-width:620px;}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:14px;max-width:900px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;}
.faq-item.open{border-color:var(--brand-line);}
.faq-q{
  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);
  transition:color var(--ease);
}
.faq-q:hover{color:var(--brand);}
.faq-icon{position:relative;flex:0 0 20px;width:20px;height:20px;color:var(--brand);}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;
  transform:translate(-50%,-50%);transition:transform var(--ease),opacity var(--ease);
}
.faq-icon::before{width:14px;height:2px;}
.faq-icon::after{width:2px;height:14px;}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms ease;}
.faq-a-inner{padding:0 24px 20px;font-size:15px;color:var(--muted);}

/* ============ 相关内容列表卡 ============ */
.related-grid{display:grid;gap:16px;}
.list-card{
  display:grid;grid-template-columns:176px 1fr;gap:20px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:16px;
  box-shadow:var(--sh-1);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.list-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6E2F1;}
.list-thumb{aspect-ratio:16/10;border-radius:10px;overflow:hidden;background:var(--placeholder);}
.list-thumb img{width:100%;height:100%;object-fit:cover;}
.list-card h3{font-size:17px;}
.list-card p{margin-top:6px;font-size:14px;color:var(--muted);}
.list-more{display:inline-flex;align-items:center;gap:6px;margin-top:10px;font-size:14px;font-weight:500;color:var(--brand);}
.list-card:hover .list-more{color:var(--brand-deep);}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 20px;
  border-radius:var(--r-pill);background:var(--brand);color:#fff;font-size:15px;font-weight:500;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity 220ms ease,transform 220ms ease,visibility 220ms ease,background var(--ease);
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--brand-deep);}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 0;font-size:15px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:48px;}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-mark{background:var(--brand);}
.footer-desc{margin-top:16px;font-size:14px;color:rgba(255,255,255,.6);max-width:320px;line-height:1.8;}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.66);}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:100%;}
}
@media (max-width:1023px){
  :root{--sec-y:64px;}
  .topbar-mid{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-list{
    position:fixed;top:0;right:0;bottom:0;left:auto;width:min(84vw,340px);
    background:#fff;flex-direction:column;align-items:stretch;gap:4px;
    margin-left:0;padding:84px 20px 32px;overflow-y:auto;
    transform:translateX(100%);transition:transform 220ms ease;z-index:90;
    box-shadow:-12px 0 40px rgba(16,26,44,.16);
  }
  .nav-list.open{transform:translateX(0);}
  .nav-link{display:block;padding:14px 12px;font-size:16px;}
  .nav-link::after{left:12px;right:auto;width:22px;bottom:8px;}
  .nav-cta{display:none;}
  .nav-toggle{position:relative;z-index:95;}
  .banner-title{font-size:32px;}
  .grid-feature{grid-template-columns:1fr;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .stat-row{grid-template-columns:repeat(2,1fr);}
  .cta-inner{flex-direction:column;align-items:flex-start;}
}
@media (max-width:767px){
  :root{--sec-y:48px;}
  body{font-size:15px;}
  .container{padding:0 16px;}
  .mainnav-inner{height:60px;}
  .brand-name{font-size:16px;}
  .anchorbar{top:60px;height:44px;}
  .anchorbar-inner{height:44px;gap:10px;}
  .anchor-cta{display:none;}
  .banner-inner{padding:64px 16px 48px;}
  .banner-title{font-size:28px;}
  .banner-sub{font-size:15px;}
  .sec-title{font-size:22px;}
  .grid-2,.grid-3{grid-template-columns:1fr;}
  .stat-row{grid-template-columns:1fr;}
  .stat{padding:20px;}
  .tl-item{grid-template-columns:1fr;gap:12px;}
  .tl-item::before{display:none;}
  .tl-marker{flex-direction:row;padding-top:0;gap:12px;}
  .tl-card{padding:20px;}
  .card-body{padding:20px;}
  .case-card{padding:20px;}
  .cta-band{padding:48px 0;}
  .cta-title{font-size:22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 100%;}
  .list-card{grid-template-columns:1fr;padding:14px;}
  .list-thumb{aspect-ratio:16/9;}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
  .float-cta{
    left:0;right:0;bottom:0;height:56px;border-radius:0;justify-content:center;
    padding:0 16px calc(12px + env(safe-area-inset-bottom));
  }
  .float-cta.hide-near-footer{opacity:0;visibility:hidden;transform:translateY(12px);}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;}
  .banner-title{font-size:25px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}

/* roulang page: category3 */
:root{
  --primary:#1B6BE0;
  --primary-dark:#1559BE;
  --primary-soft:#EAF1FD;
  --accent:#FF6B35;
  --accent-dark:#E85A26;
  --teal:#10B8A0;
  --bg:#F5F8FC;
  --bg-alt:#EEF3FA;
  --card:#FFFFFF;
  --dark:#0D1B2E;
  --text:#101A2C;
  --sub:#55637A;
  --muted:#93A0B4;
  --border:#E3EAF3;
  --radius-sm:10px;
  --radius:14px;
  --radius-lg:20px;
  --radius-pill:999px;
  --shadow:0 1px 2px rgba(16,26,44,.05),0 8px 24px rgba(16,26,44,.06);
  --shadow-hover:0 4px 10px rgba(16,26,44,.08),0 16px 36px rgba(16,26,44,.10);
  --section-y:88px;
  --font:PingFang SC,Hiragino Sans GB,Microsoft YaHei,Source Han Sans SC,system-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);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;background-color:#E9EFF7;}
a{color:var(--primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--primary-dark);}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;color:var(--text);}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
input,textarea,select{font-family:inherit;font-size:inherit;}
:focus-visible{outline:3px solid rgba(27,107,224,.35);outline-offset:2px;border-radius:6px;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* 容器 */
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.section{padding:var(--section-y) 0;}
.section-alt{background:var(--bg-alt);}
.section-head{max-width:720px;margin-bottom:40px;}
.section-title{font-size:30px;letter-spacing:.2px;}
.section-sub{margin-top:12px;color:var(--sub);font-size:16px;line-height:1.8;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-soft);border-radius:var(--radius-pill);
  padding:6px 14px;margin-bottom:16px;
}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;
  border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;
  border:1px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
  white-space:nowrap;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(27,107,224,.22);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;box-shadow:0 10px 22px rgba(27,107,224,.26);}
.btn-primary:active{transform:translateY(1px);box-shadow:none;}
.btn-outline{background:#fff;color:var(--primary);border-color:rgba(27,107,224,.4);}
.btn-outline:hover{background:var(--primary-soft);color:var(--primary-dark);border-color:var(--primary);}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,107,53,.24);}
.btn-accent:hover{background:var(--accent-dark);color:#fff;}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);}
.btn-ghost-light:hover{background:rgba(255,255,255,.12);color:#fff;}
.btn-sm{min-height:36px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled],.btn.is-disabled{opacity:.55;cursor:not-allowed;box-shadow:none;}

/* 顶部信息条 */
.topbar{background:var(--primary);color:#fff;font-size:13px;}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;min-height:36px;
}
.topbar-left{font-weight:600;letter-spacing:.2px;}
.topbar-mid{color:rgba(255,255,255,.82);}
.topbar-right{display:flex;align-items:center;gap:18px;}
.topbar-right a{color:#fff;font-weight:500;}
.topbar-right a:hover{color:rgba(255,255,255,.78);}

/* 主导航 */
.site-header{position:sticky;top:0;z-index:60;}
.mainnav{background:#fff;border-bottom:1px solid var(--border);transition:box-shadow .2s ease;}
.mainnav-inner{display:flex;align-items:center;gap:24px;min-height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);}
.brand:hover{color:var(--text);}
.brand-mark{
  width:28px;height:28px;border-radius:8px;
  background:linear-gradient(135deg,var(--primary),#3E8BF0);
  display:inline-flex;align-items:center;justify-content:center;gap:2px;
  box-shadow:0 4px 10px rgba(27,107,224,.28);
}
.brand-mark i{display:block;width:3px;border-radius:2px;background:#fff;}
.brand-mark i:nth-child(1){height:9px;opacity:.7;}
.brand-mark i:nth-child(2){height:14px;}
.brand-mark i:nth-child(3){height:9px;opacity:.7;}
.brand-name{font-size:18px;font-weight:600;letter-spacing:.2px;}
.nav-list{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  height:44px;padding:0 14px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--sub);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
  background:var(--primary);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.nav-link:hover{color:var(--primary);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--primary);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.nav-cta{margin-left:8px;}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;
  border:1px solid var(--border);border-radius:10px;
  background:#fff;color:var(--text);font-size:18px;
}
.nav-toggle:hover{background:var(--bg);}
.nav-scrim{
  display:none;position:fixed;inset:0;background:rgba(13,27,46,.45);
  opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:55;
}
.nav-scrim.show{opacity:1;pointer-events:auto;}

/* 内页横幅 */
.page-banner{
  position:relative;
  min-height:290px;
  display:flex;align-items:flex-end;
  padding:64px 0 40px;
  background-image:linear-gradient(115deg,rgba(27,107,224,.62),rgba(27,107,224,.5)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  color:#fff;
}
.page-banner h1{color:#fff;font-size:38px;letter-spacing:.4px;max-width:820px;}
.page-banner .banner-sub{
  margin-top:14px;max-width:660px;
  color:rgba(255,255,255,.9);font-size:16px;
}
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:13px;color:rgba(255,255,255,.82);margin-bottom:18px;
}
.breadcrumb a{color:rgba(255,255,255,.92);}
.breadcrumb a:hover{color:#fff;text-decoration:underline;}
.breadcrumb .sep{opacity:.6;}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.banner-tags span{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.28);
  color:#fff;font-size:13px;font-weight:500;
  padding:6px 14px;border-radius:var(--radius-pill);
}

/* 概览 */
.overview-grid{
  display:grid;grid-template-columns:1.35fr 1fr;gap:32px;align-items:start;
}
.lead-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius-lg);box-shadow:var(--shadow);
  padding:32px;
}
.lead-card h2{font-size:24px;margin-bottom:14px;}
.lead-card p{color:var(--sub);font-size:16px;}
.check-list{margin-top:18px;display:grid;gap:12px;}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--sub);}
.check-list i{color:var(--teal);margin-top:5px;font-size:14px;}
.stat-stack{display:grid;gap:16px;}
.stat-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);
  padding:22px 24px;display:flex;align-items:center;gap:18px;
}
.stat-icon{
  flex:0 0 46px;width:46px;height:46px;border-radius:12px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary);font-size:18px;
}
.stat-card .stat-num{font-size:24px;font-weight:600;color:var(--primary);line-height:1.2;}
.stat-card .stat-label{font-size:14px;color:var(--muted);}

/* 对比表 */
.table-wrap{
  overflow-x:auto;background:var(--card);
  border:1px solid var(--border);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);
}
table.compare-table{width:100%;border-collapse:collapse;min-width:760px;}
.compare-table caption{text-align:left;padding:22px 24px 0;font-size:14px;color:var(--muted);}
.compare-table th,.compare-table td{
  padding:16px 20px;text-align:left;font-size:15px;
  border-bottom:1px solid var(--border);vertical-align:top;
}
.compare-table thead th{
  background:var(--primary-soft);color:#0F4FA8;
  font-weight:600;font-size:15px;white-space:nowrap;
}
.compare-table thead th:first-child{border-top-left-radius:var(--radius-lg);}
.compare-table thead th:last-child{border-top-right-radius:var(--radius-lg);}
.compare-table tbody th{
  width:150px;font-weight:600;color:var(--text);background:#FBFCFE;
}
.compare-table tbody td{color:var(--sub);}
.compare-table tbody tr:last-child th,.compare-table tbody tr:last-child td{border-bottom:none;}
.compare-table tbody tr:hover td{background:#FAFCFF;}
.cell-strong{color:var(--text);font-weight:600;}
.pill{
  display:inline-block;font-size:13px;font-weight:500;
  padding:3px 10px;border-radius:var(--radius-pill);
  background:var(--primary-soft);color:var(--primary);
}
.pill-teal{background:rgba(16,184,160,.12);color:#0A8E7C;}
.pill-accent{background:rgba(255,107,53,.12);color:var(--accent-dark);}

/* 说明卡 */
.note-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;margin-top:44px;}
.note-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);
  overflow:hidden;transition:transform .2s ease,box-shadow .2s ease;
}
.note-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.note-card .note-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#E9EFF7;}
.note-card .note-media img{width:100%;height:100%;object-fit:cover;}
.note-card .note-body{padding:24px;}
.note-card h3{font-size:20px;margin-bottom:10px;}
.note-card p{color:var(--sub);font-size:15px;margin-bottom:0;}
.note-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}

/* 核对清单 */
.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.check-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);
  padding:26px;position:relative;
}
.check-card .num{
  display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;
  background:var(--primary-soft);color:var(--primary);
  font-size:14px;font-weight:600;margin-bottom:16px;
}
.check-card h3{font-size:18px;margin-bottom:10px;}
.check-card p{color:var(--sub);font-size:15px;margin-bottom:0;}

/* 页内 CTA */
.inline-cta{
  background:linear-gradient(115deg,#EAF1FD,#F7FAFF);
  border:1px solid rgba(27,107,224,.16);
  border-radius:var(--radius-lg);
  padding:36px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.inline-cta h3{font-size:22px;margin-bottom:8px;}
.inline-cta p{color:var(--sub);margin-bottom:0;max-width:620px;}
.inline-cta .cta-actions{display:flex;gap:12px;flex-wrap:wrap;}

/* FAQ */
.faq-list{display:grid;gap:14px;max-width:900px;}
.faq-item{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);
  overflow:hidden;
}
.faq-item.open{border-color:rgba(27,107,224,.35);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:0;text-align:left;
  padding:20px 24px;font-size:16px;font-weight:600;color:var(--text);
}
.faq-q:hover{color:var(--primary);}
.faq-icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:8px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary);
  font-size:13px;transition:transform .2s ease,background-color .2s ease,color .2s ease;
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--primary);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq-a-inner{padding:0 24px 20px;color:var(--sub);font-size:15px;line-height:1.9;}
.faq-a-inner p{margin-bottom:10px;}
.faq-a-inner p:last-child{margin-bottom:0;}

/* CTA 带 */
.cta-band{
  background-color:var(--dark);
  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:32px 32px;
  color:#fff;padding:64px 0;
}
.cta-band-inner{
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{color:#fff;font-size:28px;margin-bottom:10px;}
.cta-band p{color:rgba(255,255,255,.72);margin-bottom:0;max-width:640px;}
.cta-band .cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* 页脚 */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 28px;font-size:15px;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;
  padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1);
}
.site-footer .brand-name{color:#fff;}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.62);max-width:340px;}
.footer-col h3{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{color:rgba(255,255,255,.7);font-size:14px;}
.footer-col a:hover{color:#fff;}
.footer-col span{color:rgba(255,255,255,.62);font-size:14px;}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:24px;font-size:13px;color:rgba(255,255,255,.5);
}

/* 浮动 CTA */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:inline-flex;align-items:center;gap:8px;
  background:var(--primary);color:#fff;font-weight:600;font-size:15px;
  padding:14px 22px;border-radius:var(--radius-pill);
  box-shadow:0 12px 28px rgba(27,107,224,.32);
  opacity:0;pointer-events:none;transform:translateY(12px);
  transition:opacity .25s ease,transform .25s ease,background-color .2s ease;
}
.float-cta.show{opacity:1;pointer-events:auto;transform:translateY(0);}
.float-cta:hover{background:var(--primary-dark);color:#fff;}
.to-top{
  position:fixed;right:24px;bottom:88px;z-index:70;
  width:44px;height:44px;border-radius:50%;
  background:#fff;color:var(--primary);border:1px solid var(--border);
  box-shadow:var(--shadow);display:inline-flex;align-items:center;justify-content:center;
  opacity:0;pointer-events:none;transition:opacity .25s ease,transform .2s ease;
}
.to-top.show{opacity:1;pointer-events:auto;}
.to-top:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}

/* 响应式 */
@media (max-width:1279px){
  .container{padding:0 20px;}
}
@media (max-width:1023px){
  :root{--section-y:64px;}
  .topbar-mid{display:none;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .nav-list{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);
    background:#fff;flex-direction:column;align-items:stretch;gap:4px;
    padding:84px 20px 32px;margin:0;
    box-shadow:-18px 0 40px rgba(16,26,44,.18);
    transform:translateX(102%);transition:transform .25s ease;
    z-index:56;overflow-y:auto;
  }
  .nav-list.open{transform:translateX(0);}
  .nav-link{height:48px;padding:0 14px;font-size:16px;border-radius:10px;}
  .nav-link::after{display:none;}
  .nav-link.active,.nav-link:hover{background:var(--primary-soft);}
  .nav-cta{display:none;}
  .nav-scrim{display:block;}
  .page-banner{min-height:260px;padding:56px 0 36px;}
  .page-banner h1{font-size:30px;}
  .overview-grid{grid-template-columns:1fr;}
  .note-grid{grid-template-columns:1fr;}
  .check-grid{grid-template-columns:1fr 1fr;}
  .inline-cta{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  :root{--section-y:48px;}
  body{font-size:15px;}
  .container{padding:0 16px;}
  .topbar-inner{min-height:34px;}
  .topbar-left{font-size:12px;}
  .topbar-right{gap:14px;font-size:12px;}
  .brand-name{font-size:16px;}
  .page-banner{padding:48px 0 32px;min-height:230px;}
  .page-banner h1{font-size:24px;}
  .page-banner .banner-sub{font-size:14px;}
  .section-title{font-size:22px;}
  .lead-card{padding:22px;}
  .check-grid{grid-template-columns:1fr;}
  .check-card{padding:20px;}
  .compare-table th,.compare-table td{padding:13px 16px;font-size:14px;}
  .cta-band{padding:48px 0;}
  .cta-band h2{font-size:22px;}
  .faq-q{padding:16px 18px;font-size:15px;}
  .faq-a-inner{padding:0 18px 16px;font-size:14.5px;}
  .inline-cta{padding:24px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    justify-content:center;padding:16px 20px calc(16px + env(safe-area-inset-bottom,0px));
  }
  .to-top{right:16px;bottom:76px;}
}

/* roulang page: category4 */
:root{
  --primary:#1B6BE0;
  --primary-dark:#1559C0;
  --primary-soft:#E7F0FE;
  --accent:#FF6B35;
  --accent-dark:#E85A26;
  --teal:#10B8A0;
  --bg:#F5F8FC;
  --alt:#EEF3FA;
  --dark:#0D1B2E;
  --ink:#101A2C;
  --muted:#55637A;
  --weak:#93A0B4;
  --border:#E3EAF3;
  --white:#FFFFFF;
  --radius-card:14px;
  --radius-panel:20px;
  --radius-btn:10px;
  --shadow-sm:0 1px 2px rgba(16,26,44,.05),0 8px 24px rgba(16,26,44,.06);
  --shadow-lg:0 4px 10px rgba(16,26,44,.08),0 16px 36px rgba(16,26,44,.10);
  --sp-section:88px;
  --tr:200ms ease;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Inter,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);font-size:16px;line-height:1.8;color:var(--ink);
  background:var(--bg);-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color var(--tr)}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.3;letter-spacing:.2px}
h1{font-size:44px}
h2{font-size:30px}
h3{font-size:20px}
p{margin:0 0 16px}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
input,textarea{font-family:inherit}
:focus-visible{outline:3px solid rgba(27,107,224,.42);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--sp-section) 0}
.section-alt{background:var(--alt)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head .eyebrow{
  display:inline-block;font-size:13px;font-weight:600;color:var(--primary);
  background:var(--primary-soft);border-radius:999px;padding:5px 14px;margin-bottom:16px;letter-spacing:.4px;
}
.section-head h2{margin-bottom:14px}
.section-head p{color:var(--muted);margin:0}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:background var(--tr),color var(--tr),border-color var(--tr),transform var(--tr),box-shadow var(--tr);
}
.btn i{font-size:14px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(27,107,224,.22)}
.btn-primary:hover{background:var(--primary-dark)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{background:#fff;color:var(--primary);border-color:#BFD6F6}
.btn-outline:hover{background:var(--primary-soft);border-color:var(--primary)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 6px 16px rgba(255,107,53,.24)}
.btn-accent:hover{background:var(--accent-dark)}
.btn-accent:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}
.btn:disabled{opacity:.55;cursor:not-allowed;box-shadow:none}

.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;
  padding:4px 12px;border-radius:999px;background:var(--alt);color:var(--muted);border:1px solid var(--border);
}
.badge-primary{background:var(--primary-soft);color:var(--primary);border-color:#CFE0FB}
.badge-teal{background:#E4F8F5;color:#0B8E7C;border-color:#C6EEe8}
.badge-accent{background:#FFEFE8;color:#C64A1C;border-color:#FBD9C9}
.dot{width:8px;height:8px;border-radius:50%;background:var(--teal);display:inline-block;box-shadow:0 0 0 4px rgba(16,184,160,.16)}

/* ============ 顶部信息条 ============ */
.topbar{height:36px;background:var(--primary);color:#fff;font-size:13px;display:flex;align-items:center}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:36px}
.topbar-left{font-weight:600;white-space:nowrap}
.topbar-mid{color:rgba(255,255,255,.85);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-right{display:flex;align-items:center;gap:18px;white-space:nowrap}
.topbar-right a{color:rgba(255,255,255,.92);font-weight:500}
.topbar-right a:hover{color:#fff;text-decoration:underline}

/* ============ 主导航 ============ */
.site-header{position:sticky;top:0;z-index:60}
.mainnav{background:#fff;border-bottom:1px solid var(--border);transition:box-shadow var(--tr)}
.mainnav.is-stuck{box-shadow:0 6px 20px rgba(16,26,44,.08)}
.mainnav-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:10px;background:var(--primary);
  display:inline-flex;flex-direction:column;justify-content:center;gap:3px;padding:0 8px;flex-shrink:0;
}
.brand-mark i{display:block;height:2px;border-radius:2px;background:#fff}
.brand-mark i:nth-child(1){width:100%}
.brand-mark i:nth-child(2){width:58%}
.brand-mark i:nth-child(3){width:80%}
.brand-name{font-size:18px;font-weight:600;color:var(--ink);white-space:nowrap}
.nav-list{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;display:inline-block;padding:10px 12px;font-size:15px;font-weight:500;color:var(--muted);
  border-radius:8px;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--tr);
}
.nav-link:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.nav-cta{display:flex;align-items:center;margin-left:8px}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--border);border-radius:10px;
  background:#fff;color:var(--ink);font-size:17px;align-items:center;justify-content:center;margin-left:auto;
}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary)}
.nav-scrim{position:fixed;inset:0;background:rgba(13,27,46,.45);opacity:0;visibility:hidden;transition:opacity var(--tr),visibility var(--tr);z-index:70}
.nav-scrim.open{opacity:1;visibility:visible}

/* ============ 锚点子条 ============ */
.anchorbar{background:rgba(255,255,255,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--border)}
.anchorbar-inner{display:flex;align-items:center;gap:18px;height:48px}
.anchor-scroll{display:flex;align-items:center;gap:4px;overflow-x:auto;scrollbar-width:none;flex:1}
.anchor-scroll::-webkit-scrollbar{display:none}
.anchor-link{
  position:relative;padding:6px 12px 8px;font-size:14px;color:var(--muted);white-space:nowrap;border-radius:8px;
}
.anchor-link::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--primary);border-radius:2px;transform:scaleX(0);transition:transform var(--tr)}
.anchor-link:hover{color:var(--primary);background:var(--primary-soft)}
.anchor-link.active{color:var(--primary);font-weight:600}
.anchor-link.active::after{transform:scaleX(1)}
.anchor-cta{flex-shrink:0}

/* ============ 面包屑 ============ */
.crumbs{background:#fff;border-bottom:1px solid var(--border)}
.crumbs-inner{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--weak);height:48px;flex-wrap:wrap}
.crumbs-inner a{color:var(--muted)}
.crumbs-inner a:hover{color:var(--primary)}
.crumbs-inner i{font-size:11px;color:#C3CDDC}
.crumbs-inner .current{color:var(--primary);font-weight:600}

/* ============ 顶部大图 ============ */
.page-banner{
  position:relative;min-height:300px;display:flex;align-items:center;color:#fff;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
}
.page-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(27,107,224,.78),rgba(27,107,224,.45));}
.page-banner .container{position:relative;z-index:2;padding-top:56px;padding-bottom:56px}
.banner-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.34);color:#fff;
  border-radius:999px;padding:5px 14px;margin-bottom:18px;
}
.banner-title{font-size:40px;font-weight:700;color:#fff;max-width:760px;line-height:1.28;margin-bottom:14px}
.banner-sub{font-size:16px;color:rgba(255,255,255,.92);max-width:620px;margin:0}
.banner-stats{display:flex;flex-wrap:wrap;gap:28px;margin-top:28px}
.banner-stat{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.94)}
.banner-stat b{font-size:22px;font-weight:600}

/* ============ 概览 ============ */
.overview-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.overview-text h2{margin-bottom:16px}
.overview-text p{color:var(--muted)}
.check-list{margin-top:8px}
.check-list li{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:1px dashed var(--border)}
.check-list li:last-child{border-bottom:0}
.check-list i{color:var(--teal);font-size:15px;margin-top:6px;flex-shrink:0}
.check-list span{color:var(--muted);font-size:15px}
.check-list strong{color:var(--ink);font-weight:600}
.overview-media{position:relative}
.overview-media img{width:100%;height:400px;object-fit:cover;border-radius:var(--radius-panel);box-shadow:var(--shadow-lg);background:#E9EFF7}
.media-float{
  position:absolute;left:-16px;bottom:24px;background:#fff;border-radius:var(--radius-card);
  padding:14px 18px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:12px;border:1px solid var(--border);
}
.media-float .pulse{width:10px;height:10px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 5px rgba(16,184,160,.16)}
.media-float small{display:block;font-size:12px;color:var(--weak);line-height:1.5}
.media-float b{font-size:15px;font-weight:600}

/* ============ 折叠面板组 ============ */
.accordion-group{display:flex;flex-direction:column;gap:14px}
.acc-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;transition:box-shadow var(--tr),border-color var(--tr)}
.acc-item:hover{box-shadow:var(--shadow-sm)}
.acc-item.open{border-color:#BFD6F6;box-shadow:var(--shadow-sm)}
.acc-head{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;background:none;border:0;
  padding:20px 22px;font-size:16px;font-weight:600;color:var(--ink);
}
.acc-num{
  width:34px;height:34px;border-radius:9px;background:var(--alt);color:var(--muted);
  display:inline-flex;align-items:center;justify-content:center;font-size:14px;font-weight:600;flex-shrink:0;
}
.acc-item.open .acc-num{background:var(--primary);color:#fff}
.acc-head .acc-arrow{margin-left:auto;color:var(--weak);font-size:14px;transition:transform var(--tr)}
.acc-item.open .acc-arrow{transform:rotate(180deg);color:var(--primary)}
.acc-body{max-height:0;overflow:hidden;transition:max-height 260ms ease}
.acc-body-inner{padding:0 22px 22px 72px;color:var(--muted);font-size:15px;line-height:1.9}
.acc-body-inner ul{margin-top:10px}
.acc-body-inner li{position:relative;padding-left:18px;margin-bottom:8px}
.acc-body-inner li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;background:var(--primary);opacity:.55}
.acc-note{display:flex;gap:10px;align-items:flex-start;background:var(--alt);border-radius:10px;padding:12px 14px;margin-top:14px;font-size:14px;color:var(--muted)}
.acc-note i{color:var(--primary);margin-top:4px}

/* ============ 底部两列卡片 ============ */
.device-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.device-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);padding:26px;
  box-shadow:var(--shadow-sm);transition:transform var(--tr),box-shadow var(--tr);
  display:flex;gap:18px;align-items:flex-start;
}
.device-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.device-icon{
  width:48px;height:48px;border-radius:12px;background:var(--primary-soft);color:var(--primary);
  display:inline-flex;align-items:center;justify-content:center;font-size:19px;flex-shrink:0;
}
.device-card h3{margin-bottom:8px}
.device-card p{color:var(--muted);font-size:15px;margin:0 0 12px}
.device-tags{display:flex;flex-wrap:wrap;gap:8px}

/* ============ 页面内 CTA ============ */
.cta-band{
  background:var(--dark);color:#fff;position:relative;overflow:hidden;
  padding:64px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.06;
  background-image:linear-gradient(rgba(255,255,255,.9) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:44px 44px;
}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px}
.cta-inner h2{font-size:28px;color:#fff;margin-bottom:10px}
.cta-inner p{color:rgba(255,255,255,.76);margin:0;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ============ FAQ 精简版 ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;transition:border-color var(--tr),box-shadow var(--tr)}
.faq-item.open{border-color:#BFD6F6;box-shadow:var(--shadow-sm)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;text-align:left;background:none;border:0;
  padding:18px 22px;font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q .sign{margin-left:auto;width:26px;height:26px;border-radius:50%;background:var(--alt);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;font-size:13px;transition:transform var(--tr),background var(--tr),color var(--tr);flex-shrink:0}
.faq-item.open .faq-q .sign{transform:rotate(180deg);background:var(--primary);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms ease}
.faq-a-inner{padding:0 22px 20px 22px;color:var(--muted);font-size:15px;line-height:1.9}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  background:var(--primary);color:#fff;border-radius:999px;padding:14px 22px;
  font-size:15px;font-weight:600;box-shadow:0 10px 26px rgba(27,107,224,.34);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity var(--tr),transform var(--tr),visibility var(--tr),background var(--tr);
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--primary-dark)}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:rgba(255,255,255,.78);padding:72px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:48px}
.footer-brand .brand-name{color:#fff}
.footer-desc{margin-top:16px;color:rgba(255,255,255,.62);line-height:1.9;font-size:14px;max-width:340px}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:18px;font-weight:600}
.footer-col ul li{margin-bottom:12px}
.footer-col a,.footer-col span{color:rgba(255,255,255,.68);font-size:14px}
.footer-col a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  color:rgba(255,255,255,.5);font-size:13px;
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{padding:0 24px}
}
@media (max-width:1023px){
  :root{--sp-section:64px}
  h1{font-size:36px}
  h2{font-size:26px}
  .nav-list,.nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .nav-list.open{
    display:flex;flex-direction:column;align-items:stretch;gap:4px;
    position:fixed;top:0;right:0;bottom:0;width:min(340px,88vw);background:#fff;
    padding:84px 20px 32px;z-index:80;margin:0;overflow-y:auto;box-shadow:-12px 0 40px rgba(16,26,44,.16);
  }
  .nav-list.open .nav-link{font-size:16px;padding:14px 12px;border-radius:10px}
  .nav-list.open .nav-link::after{display:none}
  .nav-list.open .nav-link.active{background:var(--primary-soft)}
  .overview-grid{grid-template-columns:1fr;gap:36px}
  .overview-media img{height:320px}
  .device-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  :root{--sp-section:48px}
  body{font-size:15px}
  h1{font-size:28px}
  h2{font-size:22px}
  h3{font-size:17px}
  .container{padding:0 16px}
  .topbar-mid{display:none}
  .topbar-left{font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .mainnav-inner{height:60px;gap:12px}
  .brand-name{font-size:16px}
  .banner-title{font-size:26px}
  .banner-sub{font-size:15px}
  .page-banner{min-height:260px}
  .banner-stats{gap:18px}
  .banner-stat b{font-size:19px}
  .anchorbar-inner{height:44px;gap:10px}
  .anchor-cta{display:none}
  .acc-body-inner{padding:0 18px 20px 18px}
  .acc-head{padding:16px 18px;font-size:15px}
  .acc-num{width:30px;height:30px;font-size:13px}
  .device-card{padding:20px;gap:14px;flex-direction:column}
  .cta-inner h2{font-size:22px}
  .cta-actions .btn{width:100%}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-a-inner{padding:0 18px 18px}
  .overview-media img{height:240px}
  .media-float{left:12px;bottom:12px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;gap:8px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;
    padding:15px 18px calc(15px + env(safe-area-inset-bottom));
    transform:translateY(100%);
  }
  .float-cta.show{transform:translateY(0)}
  .float-cta.hide-near-footer{transform:translateY(100%);opacity:0;visibility:hidden}
}
@media (max-width:520px){
  .section-head{margin-bottom:28px}
  .check-list li{padding:8px 0}
  .banner-stats{flex-direction:column;gap:10px;margin-top:22px}
}