/* roulang page: index */
:root{
  --brand:#F0522A;
  --brand-dark:#C93E1C;
  --brand-soft:#FEF0EB;
  --tech:#0FA98E;
  --tech-soft:#E6F7F3;
  --pulse:#E4FF57;
  --ink:#1A1D21;
  --ink-2:#5A6472;
  --line:#E6E1DA;
  --bg:#FAF8F5;
  --card:#FFFFFF;
  --dark:#14181D;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --r-card:16px;
  --r-lg:24px;
  --r-btn:12px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(20,24,29,.05),0 10px 26px -14px rgba(20,24,29,.14);
  --sh-hover:0 2px 4px rgba(20,24,29,.06),0 20px 42px -18px rgba(20,24,29,.24);
  --max:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font-cn);color:var(--ink);background:var(--bg);
  font-size:16.5px;line-height:1.8;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .24s ease,border-color .24s ease,background-color .24s ease}
button,input,textarea,select{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
h1,h2,h3,h4,p{margin:0}
ul{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-weight:800;letter-spacing:-.02em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--white{background:#fff}
.section--dark{background:var(--dark);color:#E8EAED}
.section--line{border-top:1px solid var(--line)}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid #ECE8E2;transition:box-shadow .25s ease}
.site-header.is-scrolled{box-shadow:0 8px 26px -20px rgba(20,24,29,.55)}
.nav-bar{display:flex;align-items:center;gap:22px;height:70px}
.logo{display:flex;align-items:center;gap:10px;flex:none}
.logo-txt{display:flex;flex-direction:column;line-height:1.15}
.logo-txt strong{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.logo-txt em{font-style:normal;font-size:10.5px;font-weight:600;color:var(--ink-2);letter-spacing:.2em}
.nav-links{display:flex;align-items:center;gap:2px;flex:1;min-width:0}
.nav-links a{position:relative;display:inline-flex;align-items:center;height:70px;padding:0 12px;font-size:15px;font-weight:500;color:var(--ink);white-space:nowrap}
.nav-links a::after{content:"";position:absolute;left:50%;bottom:15px;width:60%;height:2px;border-radius:2px;background:var(--brand);transform:translateX(-50%) scaleX(0);transition:transform .26s ease}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after{transform:translateX(-50%) scaleX(1)}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-links a.active::after{transform:translateX(-50%) scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px;flex:none}
.nav-search{display:flex;align-items:center;gap:8px;height:42px;padding:0 14px;min-width:186px;background:#F4F1EC;border:1px solid transparent;border-radius:var(--r-pill);transition:background .24s,border-color .24s,box-shadow .24s}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 2px rgba(240,82,42,.18)}
.nav-search input{border:0;background:transparent;outline:none;font-size:14px;color:var(--ink);width:100%}
.nav-search input::placeholder{color:#9AA2AC}
.nav-toggle{display:none;width:46px;height:46px;border:1px solid var(--line);border-radius:12px;background:#fff;align-items:center;justify-content:center;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.drawer{position:fixed;left:0;right:0;top:70px;bottom:0;background:#fff;z-index:55;padding:16px 24px 32px;overflow-y:auto;opacity:0;pointer-events:none;transform:translateY(-10px);transition:opacity .26s ease,transform .26s ease}
.drawer.open{opacity:1;pointer-events:auto;transform:none}
.drawer a{display:flex;align-items:center;height:48px;font-size:16px;border-bottom:1px solid var(--line)}
.drawer a.active{color:var(--brand);font-weight:600}
.drawer .drawer-cta{margin-top:22px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background-color .24s,color .24s,border-color .24s,transform .24s}
.btn--primary{background:var(--brand);color:#fff;border-radius:var(--r-pill)}
.btn--primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn--ghost{background:#fff;border-color:var(--line);color:var(--ink);border-radius:var(--r-pill)}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.btn--light{background:#fff;color:var(--ink);border-radius:var(--r-pill)}
.btn--light:hover{color:var(--brand)}
.btn--block{width:100%}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:14.5px;font-weight:600}
.btn-link .arw{transition:transform .24s ease}
.btn-link:hover .arw{transform:translateX(4px)}

/* ---------- badges ---------- */
.badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600;letter-spacing:.02em}
.badge--brand{background:var(--brand-soft);color:var(--brand-dark)}
.badge--tech{background:var(--tech-soft);color:#0B7A66}
.eyebrow{display:inline-flex;align-items:center;gap:8px;height:28px;padding:0 14px;border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand-dark);font-size:12.5px;font-weight:700;letter-spacing:.04em}

/* ---------- sections head ---------- */
.h1{font-size:52px;line-height:1.18;font-weight:800;letter-spacing:-.02em}
.h2{font-size:34px;line-height:1.28;font-weight:700;letter-spacing:-.01em}
.h3{font-size:22px;line-height:1.4;font-weight:700}
.h4{font-size:17px;line-height:1.5;font-weight:600}
.lead{font-size:16.5px;color:var(--ink-2)}
.section--dark .lead{color:#A9B2BC}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px}
.sec-head p{margin-top:14px;max-width:720px}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--dark) url('/assets/images/backpic/back-1.png') center/cover no-repeat}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(100deg,#FFFFFF 0%,rgba(255,255,255,.94) 32%,rgba(255,255,255,.66) 58%,rgba(255,255,255,.15) 100%)}
.hero::after{content:"";position:absolute;right:-60px;bottom:-60px;width:420px;height:420px;background-image:radial-gradient(rgba(240,82,42,.34) 1.6px,transparent 1.7px);background-size:22px 22px;opacity:.5;pointer-events:none}
.hero-inner{position:relative;z-index:2;padding:92px 0 78px}
.hero h1{margin:22px 0 18px;max-width:880px}
.hero .lead{max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.stat-bar{position:relative;z-index:2;display:flex;flex-wrap:wrap;margin-top:48px;padding:22px 6px;background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:20px;backdrop-filter:blur(6px)}
.stat{flex:1 1 0;min-width:0;padding:2px 24px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat b{display:block;font-size:32px;line-height:1.1;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.stat b i{font-style:normal;font-size:16px;font-weight:700;margin-left:3px;color:var(--brand)}
.stat span{display:block;margin-top:6px;font-size:13px;color:var(--ink-2)}

/* ---------- value band ---------- */
.value-band{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.2fr);gap:56px;align-items:start}
.value-list{border-left:1px solid var(--line);padding-left:36px}
.value-item{padding:24px 0;border-top:1px solid var(--line)}
.value-item:first-child{border-top:0;padding-top:0}
.value-num{display:block;font-size:12px;font-weight:800;letter-spacing:.18em;color:var(--brand);font-variant-numeric:tabular-nums;margin-bottom:8px}
.value-item h3{font-size:18px;font-weight:600;margin-bottom:8px}
.value-item p{font-size:14.5px;color:var(--ink-2);margin:0}

/* ---------- feature split ---------- */
.feature-split{display:grid;grid-template-columns:minmax(0,300px) minmax(0,1fr);gap:48px;align-items:start}
.feature-side{position:sticky;top:98px}
.feature-side .h2{margin-bottom:16px}
.fgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start}
.fcol{display:flex;flex-direction:column;gap:24px}
.fcol--offset{margin-top:36px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);transition:transform .3s ease,box-shadow .3s ease;overflow:hidden}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.card-body{padding:26px}
.card-body .h3{margin-bottom:10px}
.card-body p{font-size:14.5px;color:var(--ink-2)}
.card-foot{margin-top:20px}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#EFEAE3}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.card:hover .card-media img{transform:scale(1.03)}
.mini-card{padding:26px}
.mini-card .mini-icon{width:44px;height:44px;border-radius:12px;background:var(--tech-soft);color:#0B7A66;display:flex;align-items:center;justify-content:center;margin-bottom:18px;font-weight:800;font-variant-numeric:tabular-nums}
.mini-card .h3{font-size:19px;margin-bottom:10px}
.mini-card p{font-size:14.5px;color:var(--ink-2)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}

/* ---------- scenes ---------- */
.scene-list{display:flex;flex-direction:column;gap:18px}
.scene{display:grid;grid-template-columns:72px minmax(0,1fr) auto;gap:26px;align-items:center;padding:26px 30px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);transition:transform .28s ease,box-shadow .28s ease}
.scene:hover{transform:translateY(-3px);box-shadow:var(--sh-hover)}
.scene:nth-child(even){margin-left:40px}
.scene-num{font-size:24px;font-weight:800;font-variant-numeric:tabular-nums;color:var(--brand);letter-spacing:-.02em}
.scene h3{font-size:19px;font-weight:600;margin-bottom:6px}
.scene p{font-size:14.5px;color:var(--ink-2)}
.scene-tags{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}

/* ---------- cases (dark) ---------- */
.case-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.case-card{background:#1B2026;border:1px solid #272D34;border-radius:var(--r-card);padding:30px}
.case-card h3{font-size:19px;font-weight:700;color:#fff;margin-bottom:12px}
.case-card p{font-size:14.5px;color:#A9B2BC}
.case-metrics{display:flex;flex-wrap:wrap;gap:34px;margin-top:24px;padding-top:22px;border-top:1px solid #272D34}
.case-metrics b{display:block;font-size:28px;font-weight:800;color:var(--pulse);font-variant-numeric:tabular-nums;letter-spacing:-.02em;line-height:1.1}
.case-metrics span{font-size:12.5px;color:#98A2AD}
.logo-strip{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:16px;margin-top:40px}
.logo-ph{height:56px;border-radius:12px;background:#1F252B;border:1px solid #2A3138;display:flex;align-items:center;justify-content:center;font-size:13px;color:#7E8894;letter-spacing:.06em}

/* ---------- news (cms) ---------- */
.news-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:36px;align-items:start}
.news-main{display:block}
.news-main .thumb{aspect-ratio:16/9;border-radius:14px;overflow:hidden;background:#EFEAE3;margin-bottom:22px}
.news-main .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.news-main:hover .thumb img{transform:scale(1.03)}
.news-main h3{font-size:24px;font-weight:700;line-height:1.4;margin:14px 0 12px;transition:color .24s}
.news-main:hover h3{color:var(--brand)}
.news-main p{font-size:15px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-2);margin-top:16px}
.news-meta i{font-style:normal;color:#C9C3BA}
.news-side{display:flex;flex-direction:column}
.news-item{display:block;padding:20px 0;border-bottom:1px dashed var(--line)}
.news-item:first-child{padding-top:0}
.news-item h4{font-size:17px;font-weight:600;line-height:1.5;transition:color .24s}
.news-item:hover h4{color:var(--brand)}
.news-item p{font-size:14px;color:var(--ink-2);margin-top:8px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.news-item .news-meta{margin-top:10px}
.news-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:64px 24px;border:1px dashed var(--line);border-radius:var(--r-card);background:#fff;color:var(--ink-2);font-size:15px;text-align:center}
.news-empty .ico{width:52px;height:52px;border-radius:50%;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;font-size:22px}

/* ---------- pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:start}
.plan{position:relative;background:#fff;border:1px solid var(--line);border-radius:20px;padding:32px 28px;box-shadow:var(--sh-card);transition:transform .28s ease,box-shadow .28s ease}
.plan:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.plan--reco{border:2px solid var(--brand);transform:translateY(-8px);box-shadow:0 20px 44px -22px rgba(240,82,42,.5)}
.plan--reco:hover{transform:translateY(-12px)}
.plan-flag{position:absolute;top:-14px;left:50%;transform:translateX(-50%);height:28px;padding:0 14px;border-radius:var(--r-pill);background:var(--brand);color:#fff;font-size:12.5px;font-weight:700;display:flex;align-items:center;letter-spacing:.04em}
.plan h3{font-size:20px;font-weight:700;margin-bottom:8px}
.plan .plan-for{font-size:14px;color:var(--ink-2);min-height:44px}
.plan .plan-price{margin:20px 0 6px;font-size:32px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.plan .plan-price small{font-size:14px;font-weight:600;color:var(--ink-2);margin-left:6px}
.plan .plan-note{font-size:13px;color:var(--ink-2)}
.plan ul{margin:24px 0 26px;display:flex;flex-direction:column;gap:12px}
.plan li{position:relative;padding-left:26px;font-size:14.5px;color:#3B4249}
.plan li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:8px;border-left:2px solid var(--tech);border-bottom:2px solid var(--tech);transform:rotate(-45deg)}
.price-foot{margin-top:26px;font-size:13.5px;color:var(--ink-2);text-align:center}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto}
.faq{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;transition:border-color .24s,box-shadow .24s}
.faq+.faq{margin-top:12px}
.faq[open]{border-color:#F3C7B7;box-shadow:var(--sh-card)}
.faq summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 24px;min-height:56px;font-size:17px;font-weight:600}
.faq summary::-webkit-details-marker{display:none}
.faq-plus{flex:none;width:28px;height:28px;border-radius:50%;border:1px solid var(--line);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:600;transition:transform .28s ease,background-color .28s ease}
.faq[open] .faq-plus{transform:rotate(45deg);background:var(--brand-soft);border-color:#F3C7B7}
.faq-body{padding:0 24px 22px;background:#FAF8F5;color:var(--ink-2);font-size:15.5px;line-height:1.8}

/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--dark);border-radius:var(--r-lg);padding:56px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:36px;align-items:center}
.cta-band::after{content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;background:radial-gradient(circle,rgba(240,82,42,.42),transparent 68%)}
.cta-band h2{color:#fff;font-size:30px;font-weight:700;line-height:1.32;letter-spacing:-.01em;max-width:620px;position:relative;z-index:2}
.cta-band p{color:#A9B2BC;font-size:15px;margin-top:14px;position:relative;z-index:2}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start;position:relative;z-index:2}
.cta-contact{font-size:14px;color:#98A2AD}
.cta-contact b{color:#fff;font-variant-numeric:tabular-nums}

/* ---------- footer ---------- */
.site-footer{background:#14181D;color:#B9BFC7;padding-top:3px}
.site-footer .top-line{height:3px;background:linear-gradient(90deg,var(--brand),var(--tech))}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:40px;padding:64px 0 44px}
.footer-brand .logo-txt strong{color:#fff}
.footer-brand .logo-txt em{color:#7E8894}
.footer-brand p{margin-top:18px;font-size:14.5px;color:#98A2AD;max-width:340px}
.footer-contact{margin-top:18px;font-size:14.5px}
.footer-contact div{margin-bottom:6px}
.footer-col h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:18px}
.footer-col li{margin-bottom:12px}
.footer-col a{font-size:14.5px;color:#B9BFC7}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{border-top:1px solid #232A31;padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:#7E8894}
.footer-bottom a:hover{color:var(--brand)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .nav-search{min-width:150px}
  .nav-links a{padding:0 9px;font-size:14.5px}
}
@media (max-width:1024px){
  .nav-links,.nav-search{display:none}
  .nav-toggle{display:flex}
  .h1{font-size:40px}
  .h2{font-size:28px}
  .section{padding:64px 0}
  .value-band{grid-template-columns:1fr;gap:34px}
  .value-list{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:8px}
  .feature-split{grid-template-columns:1fr;gap:32px}
  .feature-side{position:static}
  .news-grid{grid-template-columns:1fr;gap:28px}
  .price-grid{grid-template-columns:1fr;gap:20px}
  .plan--reco{transform:none;order:-1}
  .plan--reco:hover{transform:translateY(-4px)}
  .scene:nth-child(even){margin-left:0}
  .cta-band{grid-template-columns:1fr;padding:40px 32px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;padding:48px 0 32px}
}
@media (max-width:768px){
  body{font-size:16px}
  .h1{font-size:34px}
  .h2{font-size:25px}
  .h3{font-size:19px}
  .section{padding:48px 0}
  .hero-inner{padding:56px 0 52px}
  .scene{grid-template-columns:52px minmax(0,1fr);gap:18px;padding:22px}
  .scene-tags{grid-column:1/-1;justify-content:flex-start}
  .stat{flex:1 1 calc(50% - 1px);border-left:0;border-top:1px solid var(--line);padding:14px 18px}
  .stat:first-child,.stat:nth-child(2){border-top:0}
  .stat:nth-child(odd){border-right:1px solid var(--line)}
  .stat b{font-size:26px}
  .fgrid{grid-template-columns:1fr}
  .fcol--offset{margin-top:0}
  .case-grid{grid-template-columns:1fr}
  .logo-strip{grid-template-columns:repeat(3,minmax(0,1fr))}
  .sec-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:32px}
  .cta-band h2{font-size:23px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .btn{min-height:46px}
}
@media (max-width:520px){
  .wrap{padding:0 18px}
  .logo-txt strong{font-size:15.5px}
  .logo-txt em{letter-spacing:.12em}
  .stat-bar{border-radius:16px}
  .hero-actions .btn{width:100%}
  .news-main h3{font-size:20px}
  .plan{padding:26px 22px}
  .cta-band{padding:32px 22px;border-radius:18px}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
}

/* roulang page: article */
:root{
  --brand:#F0522A;
  --brand-d:#C93E1C;
  --brand-soft:#FEF0EB;
  --tech:#0FA98E;
  --tech-soft:#E6F7F3;
  --pulse:#E4FF57;
  --ink:#1A1D21;
  --muted:#5A6472;
  --line:#E6E1DA;
  --line-2:#ECE8E2;
  --bg:#FAF8F5;
  --card:#FFFFFF;
  --dark:#14181D;
  --r-card:16px;
  --r-block:24px;
  --r-btn:12px;
  --sh:0 1px 2px rgba(20,24,29,.05), 0 10px 26px -14px rgba(20,24,29,.14);
  --sh-hover:0 2px 4px rgba(20,24,29,.06), 0 20px 36px -16px rgba(20,24,29,.22);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.8;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:var(--brand);text-decoration:none;transition:color .22s ease,border-color .22s ease,background-color .22s ease;}
a:hover{color:var(--brand-d);}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
button{cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;font-weight:800;letter-spacing:-0.02em;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#FFFFFF;
  border-bottom:1px solid var(--line-2);
  transition:box-shadow .28s ease;
}
.site-header.scrolled{box-shadow:0 6px 20px -12px rgba(20,24,29,.28);}
.nav-bar{display:flex;align-items:center;gap:26px;height:70px;}
.logo{display:flex;align-items:center;gap:10px;flex:none;}
.logo svg{flex:none;}
.logo-txt{display:flex;flex-direction:column;line-height:1.15;}
.logo-txt strong{font-size:16.5px;font-weight:800;letter-spacing:-0.02em;color:var(--ink);}
.logo-txt em{font-style:normal;font-size:11.5px;font-weight:600;color:var(--brand);letter-spacing:.14em;}
.nav-links{display:flex;align-items:center;gap:24px;}
.nav-links a{
  position:relative;
  font-size:15px;font-weight:500;color:#3D444D;
  padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:20%;right:20%;bottom:-2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:center;transition:transform .24s ease;
}
.nav-links a:hover,.nav-links a.active{color:var(--brand);}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.nav-search{
  display:flex;align-items:center;gap:8px;
  background:#F4F1EC;border:1px solid transparent;border-radius:999px;
  padding:8px 14px;transition:border-color .22s ease,background-color .22s ease;
}
.nav-search input{
  border:0;background:transparent;outline:none;width:168px;font-size:14px;color:var(--ink);
}
.nav-search input::placeholder{color:#8A929B;}
.nav-search:focus-within{border-color:var(--brand);background:#FFF;box-shadow:0 0 0 2px var(--brand-soft);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:13px 22px;border-radius:999px;border:1px solid transparent;
  cursor:pointer;transition:all .22s ease;white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px -12px rgba(240,82,42,.9);}
.btn--primary:hover{background:var(--brand-d);color:#fff;transform:translateY(-1px);}
.btn--ghost{background:#fff;color:var(--ink);border-color:var(--line);}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.btn--light{background:#fff;color:var(--ink);}
.btn--light:hover{background:var(--brand-soft);color:var(--brand-d);}
.btn--sm{padding:10px 18px;font-size:14px;border-radius:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:#fff;position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:50%;width:18px;height:2px;background:var(--ink);border-radius:2px;
  transform:translateX(-50%);transition:.24s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;left:0;transform:none;}
.nav-toggle span::after{top:6px;left:0;transform:none;}

/* ---------- article head ---------- */
.article-hero{
  position:relative;
  background:linear-gradient(180deg,#FFF8F4 0%,#FAF8F5 70%);
  border-bottom:1px solid var(--line-2);
  padding:40px 0 44px;
  overflow:hidden;
}
.article-hero::after{
  content:"";position:absolute;right:-90px;top:-70px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(240,82,42,.12) 0%,rgba(240,82,42,0) 68%);
  pointer-events:none;
}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--muted);}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{color:#C9C2B8;}
.crumbs .cur{color:var(--brand);font-weight:600;}
.article-hero h1{
  margin-top:16px;
  font-size:52px;font-weight:800;letter-spacing:-0.02em;line-height:1.24;
  color:var(--ink);max-width:960px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:20px;font-size:13.5px;color:var(--muted);
}
.article-meta .divider{width:1px;height:12px;background:#D8D2C9;}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.badge--brand{background:var(--brand-soft);color:var(--brand-d);}
.badge--tech{background:var(--tech-soft);color:#0B7A66;}
.badge--dark{background:rgba(228,255,87,.16);color:var(--pulse);}

/* ---------- layout ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;
  padding:56px 0 72px;
  align-items:start;
}
.article-main{min-width:0;}
.reading{max-width:820px;}
.panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh);
}
.article-body{padding:34px 34px 24px;font-size:16.5px;}
.article-body p{margin:0 0 22px;line-height:1.9;color:#22262B;}
.article-body h2{
  position:relative;font-size:23px;font-weight:700;line-height:1.4;
  margin:42px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:3px;background:var(--brand);
}
.article-body h3{font-size:19px;font-weight:700;margin:32px 0 12px;line-height:1.5;}
.article-body h4{font-size:17px;font-weight:700;margin:24px 0 10px;}
.article-body img{border-radius:14px;margin:10px auto;width:100%;height:auto;}
.article-body blockquote{
  background:var(--bg);border-left:3px solid var(--tech);border-radius:0 12px 12px 0;
  padding:16px 20px;margin:0 0 24px;color:#3D444D;font-size:16px;
}
.article-body ul,.article-body ol{margin:0 0 22px;padding-left:22px;line-height:1.85;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:8px;}
.article-body li::marker{color:var(--brand);font-weight:700;}
.article-body a{color:var(--brand);font-weight:600;border-bottom:1px solid rgba(240,82,42,.35);}
.article-body a:hover{border-bottom-color:var(--brand-d);}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 24px;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px;text-align:left;vertical-align:top;}
.article-body th{background:#F4F1EC;font-weight:700;}
.article-body code{
  font-family:"SFMono-Regular",Consolas,"Liberation Mono",monospace;font-size:14px;
  background:#F4F1EC;padding:2px 6px;border-radius:6px;
}
.article-body pre{
  background:#F4F1EC;border:1px solid var(--line);border-radius:12px;
  padding:16px;overflow-x:auto;margin:0 0 24px;
}
.article-body pre code{background:none;padding:0;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:6px;}
.article-foot{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 34px 28px;border-top:1px solid var(--line-2);margin-top:8px;
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  background:#F4F1EC;color:#4A525C;font-size:12.5px;font-weight:600;
}
.tag:hover{background:var(--brand-soft);color:var(--brand-d);}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand);}
.link-arrow svg{transition:transform .22s ease;}
.link-arrow:hover svg{transform:translateX(4px);}
.empty-state{
  text-align:center;padding:64px 24px;
}
.empty-state .ico{
  width:64px;height:64px;margin:0 auto 18px;border-radius:50%;
  background:var(--brand-soft);display:flex;align-items:center;justify-content:center;font-size:26px;
}
.empty-state h3{font-size:22px;font-weight:700;margin-bottom:10px;}
.empty-state p{color:var(--muted);margin-bottom:22px;}

/* ---------- sidebar ---------- */
.sidebar{position:sticky;top:94px;display:flex;flex-direction:column;gap:20px;}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh);padding:22px;}
.side-card h3{font-size:16px;font-weight:700;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line-2);}
.side-list li + li{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line-2);}
.side-list a{display:block;font-size:14.5px;font-weight:600;color:var(--ink);line-height:1.6;}
.side-list a:hover{color:var(--brand);}
.side-list span{display:block;font-size:12.5px;color:var(--muted);margin-top:6px;}
.side-cta{background:var(--dark);border-color:var(--dark);color:#E8EAED;}
.side-cta h3{color:#fff;border-bottom-color:rgba(255,255,255,.14);}
.side-cta p{font-size:14px;color:#B9BFC7;line-height:1.75;margin-bottom:16px;}
.side-cta .btn{width:100%;}
.side-cta .tel{display:block;margin-top:12px;font-size:15px;font-weight:700;color:var(--pulse);text-align:center;}

/* ---------- sections ---------- */
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section--alt{background:#fff;border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2);}
.sec-head{max-width:720px;margin-bottom:40px;}
.sec-head h2{font-size:34px;font-weight:700;letter-spacing:-0.01em;line-height:1.3;}
.sec-head p{margin-top:12px;color:var(--muted);font-size:16px;}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh);overflow:hidden;
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:#DFD8CF;}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#F1EDE7;}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.card:hover .card-media img{transform:scale(1.03);}
.card-media .badge{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.94);color:var(--brand-d);}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1;}
.card-body h3{font-size:19px;font-weight:700;line-height:1.5;margin-bottom:10px;}
.card-body p{font-size:14.5px;color:var(--muted);line-height:1.75;flex:1;}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:18px;font-size:13px;color:var(--muted);}
.cta-band{
  background:linear-gradient(120deg,#14181D 0%,#1D2329 62%,#2A2118 100%);
  border-radius:var(--r-block);padding:52px 48px;color:#E8EAED;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;bottom:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(240,82,42,.28),rgba(240,82,42,0) 70%);
}
.cta-band h2{font-size:32px;font-weight:800;color:#fff;letter-spacing:-0.01em;line-height:1.32;max-width:620px;}
.cta-band p{margin-top:12px;color:#B9BFC7;font-size:16px;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1;}
.cta-info{margin-top:14px;font-size:14px;color:#9AA2AB;}
.cta-info strong{color:var(--pulse);font-weight:700;}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#B9BFC7;margin-top:0;}
.site-footer .top-line{height:3px;background:linear-gradient(90deg,var(--brand),var(--tech));}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding:60px 0 40px;
}
.footer-brand .logo-txt strong{color:#fff;}
.footer-brand p{font-size:14.5px;line-height:1.85;margin-top:16px;max-width:420px;color:#9AA2AB;}
.footer-contact{margin-top:18px;font-size:14px;color:#C8CDD4;}
.footer-contact div + div{margin-top:6px;}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px;}
.footer-col li + li{margin-top:11px;}
.footer-col a{font-size:14.5px;color:#B9BFC7;}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding:20px 0 30px;border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;color:#8A929B;
}
.reveal{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease;}
.reveal.in{opacity:1;transform:none;}

@media (max-width:1280px){
  .article-hero h1{font-size:46px;}
}
@media (max-width:1024px){
  .nav-bar{height:66px;}
  .nav-links{
    position:fixed;left:0;right:0;top:66px;background:#fff;
    flex-direction:column;align-items:stretch;gap:0;
    padding:12px 24px 24px;border-bottom:1px solid var(--line);
    box-shadow:0 20px 30px -22px rgba(20,24,29,.4);
    transform:translateY(-14px);opacity:0;pointer-events:none;transition:.26s ease;
    max-height:calc(100vh - 66px);overflow-y:auto;
  }
  .nav-links a{height:48px;display:flex;align-items:center;font-size:16px;border-bottom:1px solid var(--line-2);}
  .nav-links a::after{display:none;}
  body.nav-open .nav-links{transform:none;opacity:1;pointer-events:auto;}
  .nav-toggle{display:block;}
  .nav-search{display:none;}
  .article-layout{grid-template-columns:1fr;gap:32px;padding:44px 0 60px;}
  .sidebar{position:static;order:2;}
  .article-body{padding:26px 24px 18px;}
  .article-foot{padding:18px 24px 24px;}
  .article-hero h1{font-size:38px;}
  .section{padding:64px 0;}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{padding:40px 32px;}
  .cta-band h2{font-size:27px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px;}
}
@media (max-width:768px){
  .wrap{padding:0 18px;}
  .article-hero{padding:28px 0 32px;}
  .article-hero h1{font-size:30px;}
  .reading{max-width:100%;}
  .section{padding:52px 0;}
  .section--tight{padding:48px 0;}
  .sec-head{margin-bottom:28px;}
  .sec-head h2{font-size:25px;}
  .grid-3{grid-template-columns:1fr;}
  .cta-band{padding:32px 22px;border-radius:18px;}
  .cta-band h2{font-size:23px;}
  .cta-actions .btn{width:100%;min-height:46px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;}
  .article-meta{font-size:13px;gap:10px;}
  .btn{padding:12px 18px;}
  .nav-right .btn--primary{display:none;}
}

/* roulang page: category1 */
:root{
  --brand:#F0522A; --brand-dark:#C93E1C; --brand-tint:#FEF0EB;
  --tech:#0FA98E; --tech-tint:#E6F7F3; --pulse:#E4FF57;
  --ink:#1A1D21; --ink-2:#5A6472; --line:#E6E1DA; --page:#FAF8F5; --card:#FFFFFF; --dark:#14181D;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --r-card:16px; --r-block:24px; --r-btn:12px;
  --sh-1:0 1px 2px rgba(20,24,29,.05),0 10px 26px -14px rgba(20,24,29,.14);
  --sh-2:0 2px 4px rgba(20,24,29,.06),0 18px 40px -18px rgba(20,24,29,.22);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font-cn);background:var(--page);color:var(--ink);font-size:16.5px;line-height:1.8}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .22s ease}
a:hover{color:var(--brand-dark)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.num{font-variant-numeric:tabular-nums;font-weight:800;letter-spacing:-.02em}

/* ============ Header ============ */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid #ECE8E2;transition:box-shadow .25s ease}
.site-header.scrolled{box-shadow:0 8px 24px -16px rgba(20,24,29,.35)}
.nav-bar{display:flex;align-items:center;gap:26px;height:70px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);flex:none}
.logo:hover{color:var(--ink)}
.logo-txt{display:flex;flex-direction:column;line-height:1.16}
.logo-txt strong{font-size:17px;font-weight:800;letter-spacing:-.01em}
.logo-txt em{font-style:normal;font-size:11.5px;color:var(--ink-2);letter-spacing:.14em}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--ink);padding:8px 0}
.nav-links a::after{content:"";position:absolute;left:50%;bottom:0;height:2px;width:0;background:var(--brand);border-radius:2px;transform:translateX(-50%);transition:width .22s ease}
.nav-links a:hover,.nav-links a.active{color:var(--brand)}
.nav-links a:hover::after,.nav-links a.active::after{width:60%}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.nav-search{display:flex;align-items:center;gap:8px;background:#F4F1EC;border:2px solid transparent;border-radius:999px;height:40px;padding:0 14px;transition:.2s ease}
.nav-search:focus-within{background:#fff;border-color:var(--brand)}
.nav-search input{border:0;background:transparent;outline:none;width:168px;font-size:14px}
.nav-search input::placeholder{color:#8A929B}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;position:relative;align-items:center;justify-content:center;cursor:pointer}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;content:"";transition:.22s ease;position:absolute;left:50%;transform:translateX(-50%)}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ============ Buttons ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:all .22s ease;text-align:center}
.btn--primary{background:var(--brand);color:#fff;border-radius:999px}
.btn--primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.btn--ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn--ghost:hover{background:var(--brand-tint);border-color:var(--brand);color:var(--brand-dark)}
.btn--onDark{background:#fff;color:var(--dark)}
.btn--onDark:hover{background:var(--brand-tint);color:var(--brand-dark);transform:translateY(-1px)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand)}
.link-arrow i{font-style:normal;transition:transform .22s ease}
.link-arrow:hover i{transform:translateX(4px)}

/* ============ Badges ============ */
.badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:12.5px;font-weight:600;line-height:1}
.badge--brand{background:var(--brand-tint);color:var(--brand-dark)}
.badge--tech{background:var(--tech-tint);color:#0B7E6A}

/* ============ Hero banner ============ */
.hero-banner{position:relative;border-radius:0 0 var(--r-block) var(--r-block);overflow:hidden;background:linear-gradient(90deg,rgba(20,24,29,.90) 0%,rgba(20,24,29,.66) 52%,rgba(20,24,29,.30) 100%),url('/assets/images/backpic/back-1.png') center/cover no-repeat;color:#fff}
.hero-banner .wrap{min-height:280px;display:flex;flex-direction:column;justify-content:flex-end;padding-top:34px;padding-bottom:34px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:rgba(255,255,255,.72);margin-bottom:16px;flex-wrap:wrap}
.crumb a{color:rgba(255,255,255,.72)}
.crumb a:hover{color:#fff}
.crumb .sep{color:rgba(255,255,255,.45)}
.crumb .current{color:#fff}
.hero-banner h1{font-size:44px;font-weight:800;letter-spacing:-.02em;line-height:1.24;max-width:820px}
.hero-sub{margin-top:14px;font-size:18px;color:rgba(255,255,255,.84);max-width:640px;line-height:1.7}
.hero-btns{margin-top:26px;display:flex;gap:14px;flex-wrap:wrap}
.hero-facts{margin-top:28px;display:flex;gap:28px;flex-wrap:wrap;font-size:13.5px;color:rgba(255,255,255,.8)}
.hero-facts div{display:flex;align-items:center;gap:8px}
.hero-facts div+div{padding-left:28px;border-left:1px solid rgba(255,255,255,.24)}
.hero-facts b{color:#fff;font-size:17px;font-variant-numeric:tabular-nums;font-weight:800}

/* ============ Sections ============ */
.sec{padding:88px 0}
.sec--tight{padding:64px 0}
.sec--alt{background:#fff}
.sec-head{margin-bottom:40px}
.eyebrow{display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.16em;color:var(--brand);text-transform:uppercase}
.sec-title{font-size:34px;font-weight:700;margin-top:10px}
.sec-sub{margin-top:12px;font-size:16px;color:var(--ink-2);max-width:780px;line-height:1.85}
.lead{font-size:16.5px;line-height:1.85;color:var(--ink-2);max-width:820px}

/* ============ Gear layout ============ */
.gear-layout{display:grid;grid-template-columns:196px minmax(0,1fr);gap:34px;margin-top:36px}
.gear-filter{display:flex;flex-direction:column;gap:10px;align-self:start;position:sticky;top:96px}
.chip{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);font-size:14.5px;cursor:pointer;white-space:nowrap;transition:.2s ease}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.chip.is-on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.gear-tip{border:1px solid var(--line);background:#fff;border-radius:var(--r-card);padding:18px;font-size:13.5px;color:var(--ink-2);line-height:1.75;margin-top:8px}
.gear-tip strong{display:block;color:var(--ink);font-size:14.5px;margin-bottom:6px}
.gear-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.gear-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform .28s ease,box-shadow .28s ease}
.gear-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.gear-media{position:relative;aspect-ratio:16/9;background:#F4F1EC;overflow:hidden}
.gear-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.gear-card:hover .gear-media img{transform:scale(1.03)}
.gear-media .badge{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.94)}
.gear-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.gear-body h3{font-size:19px;font-weight:700}
.gear-body p{font-size:14.8px;color:var(--ink-2);line-height:1.8}
.gear-spec{margin-top:auto;display:flex;border-top:1px dashed var(--line);padding-top:14px}
.gear-spec>div{flex:1;min-width:0}
.gear-spec>div+div{border-left:1px solid var(--line);padding-left:12px}
.gear-spec .k{display:block;font-size:12.5px;color:var(--ink-2);margin-bottom:2px}
.gear-spec .v{display:block;font-size:15px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.gear-foot{margin-top:14px;display:flex;align-items:center;justify-content:space-between;gap:12px}

/* ============ Value points ============ */
.points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-left:1px solid var(--line);margin-top:34px}
.point{padding:4px 28px;border-right:1px solid var(--line)}
.point .idx{font-size:12.5px;font-weight:700;color:var(--brand);letter-spacing:.14em}
.point h3{font-size:18px;font-weight:600;margin:10px 0 8px}
.point p{font-size:14.5px;color:var(--ink-2);line-height:1.8}

/* ============ Stats band ============ */
.stats-band{background:var(--dark);border-radius:var(--r-block);padding:46px 34px;color:#E8EAED}
.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:26px}
.stat .n{font-size:32px;font-weight:800;font-variant-numeric:tabular-nums;color:#fff;letter-spacing:-.02em;line-height:1.2}
.stat .n em{font-style:normal;font-size:18px;margin-left:2px;color:#fff}
.stat.hl .n em{color:var(--pulse)}
.stat .t{margin-top:6px;font-size:13.5px;color:#9BA3AD}
.stat+.stat{border-left:1px solid #262D35;padding-left:26px}

/* ============ Steps ============ */
.steps{position:relative;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-top:40px}
.steps::before{content:"";position:absolute;left:8px;right:8px;top:19px;height:2px;background:var(--line);z-index:0}
.step{position:relative;z-index:1}
.step .dot{width:40px;height:40px;border-radius:999px;background:var(--brand-tint);color:var(--brand-dark);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px;border:2px solid #fff}
.step h3{font-size:17px;font-weight:700;margin:16px 0 8px}
.step p{font-size:14.5px;color:var(--ink-2);line-height:1.8}

/* ============ FAQ ============ */
.faq-list{max-width:900px;margin-top:34px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:#fff;margin-bottom:14px;overflow:hidden;transition:border-color .2s ease}
.faq-item:hover{border-color:#D8D1C7}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:58px;padding:16px 22px;font-size:17px;font-weight:600;cursor:pointer;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;font-weight:500;color:var(--brand);line-height:1;transition:transform .25s ease}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item[open]{background:var(--page)}
.faq-a{padding:0 22px 20px;font-size:15.5px;color:var(--ink-2);line-height:1.8}

/* ============ CTA band ============ */
.cta-band{position:relative;overflow:hidden;background:linear-gradient(120deg,#14181D 0%,#1F2630 100%);border-radius:var(--r-block);padding:56px 48px;color:#fff}
.cta-band::after{content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(240,82,42,.32),transparent 68%)}
.cta-band h2{font-size:32px;font-weight:800;letter-spacing:-.02em;max-width:720px;position:relative;z-index:1}
.cta-band p{margin-top:14px;font-size:16px;color:#B9BFC7;max-width:640px;position:relative;z-index:1}
.cta-actions{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap;align-items:center;position:relative;z-index:1}
.cta-tel{font-size:15px;color:#fff;font-weight:600;font-variant-numeric:tabular-nums}

/* ============ Footer ============ */
.site-footer{background:var(--dark);color:#B9BFC7;margin-top:0}
.site-footer .top-line{height:3px;background:linear-gradient(90deg,var(--brand),var(--tech))}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px;padding:58px 0 38px}
.footer-brand .logo{color:#fff}
.footer-brand .logo-txt strong{color:#fff}
.footer-brand .logo-txt em{color:#8A929B}
.footer-brand p{margin:18px 0;font-size:14.5px;line-height:1.85;max-width:420px}
.footer-contact div{font-size:14px;line-height:2}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#B9BFC7;font-size:14.5px}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{border-top:1px solid #242A31;padding:18px 0 30px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:#8A929B}

/* ============ Reveal ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .sec{padding:64px 0}
  .sec--tight{padding:52px 0}
  .hero-banner h1{font-size:34px}
  .sec-title{font-size:27px}
  .gear-layout{grid-template-columns:minmax(0,1fr);gap:22px}
  .gear-filter{position:static;flex-direction:row;overflow-x:auto;padding-bottom:6px;-webkit-overflow-scrolling:touch}
  .gear-tip{display:none}
  .points{grid-template-columns:minmax(0,1fr);border-left:0}
  .point{padding:20px 0;border-right:0;border-top:1px solid var(--line)}
  .point:first-child{border-top:0}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .steps::before{display:none}
  .stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .stat+.stat{border-left:0;padding-left:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .nav-links{position:fixed;top:70px;left:0;right:0;bottom:0;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:10px 24px 32px;transform:translateX(-100%);transition:transform .28s ease;overflow-y:auto;box-shadow:0 16px 30px -20px rgba(20,24,29,.4)}
  .nav-links.open{transform:translateX(0)}
  .nav-links a{display:flex;align-items:center;height:48px;border-bottom:1px solid var(--line);font-size:16px;padding:0}
  .nav-links a::after{display:none}
  .nav-toggle{display:inline-flex}
  .nav-search{display:none}
}
@media (max-width:768px){
  .wrap{padding:0 18px}
  .nav-bar{height:64px;gap:14px}
  .nav-links{top:64px}
  .hero-banner .wrap{min-height:250px;padding-top:26px;padding-bottom:26px}
  .hero-banner h1{font-size:30px;max-width:100%}
  .hero-sub{font-size:16.5px}
  .hero-facts{gap:16px;font-size:13px}
  .hero-facts div+div{padding-left:16px}
  .gear-grid{grid-template-columns:minmax(0,1fr)}
  .stats-band{padding:34px 22px}
  .stat .n{font-size:27px}
  .cta-band{padding:38px 24px}
  .cta-band h2{font-size:25px}
  .footer-grid{grid-template-columns:1fr;gap:26px;padding:44px 0 30px}
  .footer-bottom{flex-direction:column;gap:6px}
  .btn{min-height:46px;padding:0 20px}
}
@media (max-width:520px){
  .sec{padding:48px 0}
  .hero-banner h1{font-size:26px}
  .sec-title{font-size:23px}
  .steps{grid-template-columns:minmax(0,1fr)}
  .stats-grid{grid-template-columns:minmax(0,1fr)}
  .hero-btns .btn{flex:1 1 100%}
}

/* roulang page: category2 */
:root{
  --brand:#F0522A;
  --brand-dark:#C93E1C;
  --brand-soft:#FEF0EB;
  --tech:#0FA98E;
  --tech-soft:#E6F7F3;
  --pulse:#E4FF57;
  --ink:#1A1D21;
  --ink-2:#5A6472;
  --line:#E6E1DA;
  --bg:#FAF8F5;
  --card:#FFFFFF;
  --dark:#14181D;
  --r-card:16px;
  --r-block:24px;
  --r-btn:12px;
  --r-img:14px;
  --sh-card:0 1px 2px rgba(20,24,29,.05),0 10px 26px -14px rgba(20,24,29,.14);
  --sh-card-h:0 2px 4px rgba(20,24,29,.06),0 18px 34px -16px rgba(20,24,29,.22);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{margin:0;font-family:var(--font-cn);font-size:16.5px;line-height:1.8;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .22s ease;}
a:hover{color:var(--brand);}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;font-weight:800;letter-spacing:-.02em;}

/* ============ 顶部导航 ============ */
.site-header{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid #ECE8E2;transition:box-shadow .25s ease;}
.site-header.is-scrolled{box-shadow:0 8px 22px -14px rgba(20,24,29,.32);}
.nav-bar{height:70px;display:flex;align-items:center;gap:24px;}
.logo{display:flex;align-items:center;gap:10px;flex:none;}
.logo-txt{display:flex;flex-direction:column;line-height:1.15;}
.logo-txt strong{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink);}
.logo-txt em{font-style:normal;font-size:11.5px;letter-spacing:.12em;color:var(--ink-2);}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:10px;}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:#33383E;padding:6px 0;}
.nav-links a::after{content:"";position:absolute;left:50%;bottom:0;width:0;height:2px;border-radius:2px;background:var(--brand);transform:translateX(-50%);transition:width .24s ease;}
.nav-links a:hover{color:var(--brand);}
.nav-links a:hover::after,.nav-links a.active::after{width:60%;}
.nav-links a.active{color:var(--brand);font-weight:600;}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px;}
.nav-search{display:flex;align-items:center;gap:8px;height:42px;padding:0 16px;border-radius:999px;background:#F4F1EC;border:1px solid transparent;transition:all .22s ease;}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(240,82,42,.12);}
.nav-search input{border:0;background:transparent;outline:none;width:176px;font-size:14.5px;font-family:inherit;color:var(--ink);}
.nav-search input::placeholder{color:#8A929B;}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;position:relative;cursor:pointer;padding:0;}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:50%;width:18px;height:2px;border-radius:2px;background:var(--ink);transform:translateX(-50%);transition:.24s ease;}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:15.5px;font-weight:600;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:all .22s ease;}
.btn--primary{background:var(--brand);color:#fff;}
.btn--primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.btn--ghost{background:#fff;border-color:var(--line);color:var(--ink);}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}
.btn--pill{border-radius:999px;}
.nav-right .btn{height:44px;padding:0 22px;border-radius:999px;}
.btn--light{background:#fff;color:var(--ink);}
.btn--light:hover{background:var(--brand);color:#fff;border-color:var(--brand);transform:translateY(-1px);}

/* ============ 面包屑 ============ */
.crumb-bar{background:#fff;border-bottom:1px solid #F2EEE8;padding:14px 0;}
.crumb{font-size:13.5px;color:var(--ink-2);display:flex;align-items:center;flex-wrap:wrap;gap:2px;}
.crumb a{color:var(--ink-2);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{margin:0 8px;color:#C6C0B8;}
.crumb .cur{color:var(--brand);font-weight:600;}

/* ============ 分类页 Hero ============ */
.cat-hero{position:relative;background:var(--dark);overflow:hidden;}
.cat-hero__bg{position:absolute;inset:0;}
.cat-hero__bg img{width:100%;height:100%;object-fit:cover;opacity:.45;}
.cat-hero__bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(20,24,29,.95) 0%,rgba(20,24,29,.76) 46%,rgba(20,24,29,.28) 100%);}
.cat-hero__inner{position:relative;z-index:2;padding:60px 0 58px;max-width:840px;}
.cat-hero h1{color:#fff;font-size:46px;line-height:1.22;font-weight:800;letter-spacing:-.02em;margin:18px 0 14px;}
.cat-hero p.sub{color:#C7CDD5;font-size:18px;max-width:660px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:12.5px;font-weight:600;}
.badge--on-dark{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.2);}

/* ============ 数据条 ============ */
.stat-bar{background:#fff;border-bottom:1px solid var(--line);}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.stat{padding:26px 26px;border-left:1px solid var(--line);}
.stat:first-child{border-left:0;padding-left:0;}
.stat b{display:block;font-size:32px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.02em;color:var(--ink);line-height:1.3;}
.stat b em{font-style:normal;font-size:15px;color:var(--brand);margin-left:4px;font-weight:700;}
.stat span{font-size:13px;color:var(--ink-2);}

/* ============ 通用板块 ============ */
.sec{padding:88px 0;}
.sec--white{background:#fff;}
.sec--tight{padding:64px 0;}
.sec-tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:12.5px;font-weight:600;background:var(--brand-soft);color:var(--brand-dark);}
.sec-tag--tech{background:var(--tech-soft);color:#0B7C68;}
h2.sec-title{font-size:34px;line-height:1.3;font-weight:700;letter-spacing:-.02em;margin:16px 0 12px;}
.sec-desc{color:var(--ink-2);font-size:16px;}
.sec-head{max-width:780px;margin-bottom:40px;}

/* ============ 导语区 ============ */
.intro-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:60px;align-items:start;}
.intro-text p{color:var(--ink-2);font-size:16.5px;line-height:1.9;}
.intro-text p + p{margin-top:18px;}
.intro-points{border-left:2px solid var(--brand-soft);padding-left:26px;display:flex;flex-direction:column;gap:26px;margin-top:8px;}
.intro-point i{font-style:normal;display:block;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--brand);}
.intro-point h3{font-size:18px;font-weight:600;margin:6px 0 6px;}
.intro-point p{font-size:14.5px;color:var(--ink-2);}

/* ============ Z 字形图文 ============ */
.zrow{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:44px 0;border-top:1px solid var(--line);}
.zrow:first-child{border-top:0;padding-top:0;}
.zrow--flip .zrow__media{order:2;}
.zrow__media{position:relative;border-radius:var(--r-block);overflow:hidden;aspect-ratio:16/10;background:#EFEBE5;box-shadow:var(--sh-card);}
.zrow__media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.zrow:hover .zrow__media img{transform:scale(1.03);}
.zrow__media .tag-float{position:absolute;left:16px;top:16px;padding:6px 12px;border-radius:999px;font-size:12.5px;background:rgba(20,24,29,.82);color:#fff;}
.zrow__body h3{font-size:22px;font-weight:700;letter-spacing:-.01em;margin-bottom:12px;}
.zrow__body > p{color:var(--ink-2);font-size:16px;}
.zrow__body > p + p{margin-top:10px;}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:26px;padding-top:20px;border-top:1px dashed var(--line);}
.metrics b{display:block;font-size:22px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.02em;color:var(--brand);line-height:1.35;}
.metrics span{font-size:12.5px;color:var(--ink-2);}

/* ============ 深色数据带 ============ */
.data-band{background:var(--dark);color:#E8EAED;padding:68px 0;}
.data-band .band-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:36px;}
.data-band h2{font-size:30px;font-weight:700;color:#fff;letter-spacing:-.02em;}
.data-band .band-head p{color:#9AA3AD;font-size:14.5px;max-width:520px;}
.band-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;}
.band-item b{display:block;font-size:42px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.02em;color:#fff;line-height:1.2;}
.band-item b em{font-style:normal;font-size:19px;color:var(--pulse);margin-left:5px;font-weight:700;}
.band-item span{display:block;margin-top:6px;font-size:13.5px;color:#9AA3AD;}

/* ============ 适用场景 ============ */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.scene{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);padding:26px 28px;box-shadow:var(--sh-card);transition:transform .26s ease,box-shadow .26s ease,border-color .26s ease;}
.scene:hover{transform:translateY(-4px);box-shadow:var(--sh-card-h);border-color:#EFD9CF;}
.scene i{font-style:normal;font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--brand);}
.scene h3{font-size:18px;font-weight:700;margin:10px 0 8px;}
.scene p{font-size:15px;color:var(--ink-2);}
.scene .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;font-size:12.5px;background:var(--brand-soft);color:var(--brand-dark);}
.tag--tech{background:var(--tech-soft);color:#0B7C68;}

/* ============ 发布链路 ============ */
.chain{display:grid;grid-template-columns:repeat(4,1fr);}
.chain__item{position:relative;padding-right:28px;}
.chain__item::after{content:"";position:absolute;left:56px;right:14px;top:26px;height:1px;background:linear-gradient(90deg,var(--brand),rgba(240,82,42,.15));}
.chain__item:last-child::after{display:none;}
.chain__node{width:52px;height:52px;border-radius:50%;background:#fff;border:2px solid var(--brand);color:var(--brand);display:flex;align-items:center;justify-content:center;font-weight:800;font-variant-numeric:tabular-nums;font-size:16px;position:relative;z-index:2;}
.chain h3{font-size:17px;font-weight:700;margin:18px 0 8px;}
.chain p{font-size:14.5px;color:var(--ink-2);}

/* ============ FAQ ============ */
.faq{max-width:900px;border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;}
.faq details{border-top:1px solid var(--line);}
.faq details:first-child{border-top:0;}
.faq details[open]{background:var(--bg);}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:16px 22px;font-size:17px;font-weight:600;cursor:pointer;list-style:none;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--brand);}
.faq .plus{flex:none;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);position:relative;transition:transform .24s ease,border-color .24s ease;background:#fff;}
.faq .plus::before,.faq .plus::after{content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;transform:translate(-50%,-50%);}
.faq .plus::before{width:12px;height:2px;}
.faq .plus::after{width:2px;height:12px;}
.faq details[open] .plus{transform:rotate(45deg);border-color:var(--brand);}
.faq .ans{padding:0 22px 22px;font-size:15.5px;line-height:1.8;color:var(--ink-2);}

/* ============ CTA ============ */
.cta-band{position:relative;overflow:hidden;background:var(--dark);border-radius:var(--r-block);padding:58px;}
.cta-band::after{content:"";position:absolute;right:-70px;top:-70px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(240,82,42,.34),transparent 70%);}
.cta-inner{position:relative;z-index:2;}
.cta-band h2{color:#fff;font-size:34px;font-weight:800;letter-spacing:-.02em;line-height:1.3;margin-bottom:14px;}
.cta-band p{color:#B9BFC7;font-size:16px;max-width:640px;}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:30px;}
.cta-contact{color:#B9BFC7;font-size:14.5px;}
.cta-contact span{color:#fff;font-weight:600;font-variant-numeric:tabular-nums;}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:#E8EAED;margin-top:88px;}
.site-footer .top-line{height:3px;background:linear-gradient(90deg,var(--brand),var(--tech));}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:64px 0 40px;}
.footer-brand .logo .logo-txt strong{color:#fff;}
.footer-brand .logo .logo-txt em{color:#8A929B;}
.footer-brand p{color:#B9BFC7;font-size:14.5px;line-height:1.85;margin:18px 0 16px;max-width:390px;}
.footer-contact div{font-size:14px;color:#B9BFC7;line-height:1.9;}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin:6px 0 16px;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{color:#B9BFC7;font-size:14.5px;}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{border-top:1px solid #232A31;padding:20px 0 28px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px;color:#8A929B;}

/* ============ 响应式 ============ */
@media (max-width:1280px){
  .nav-search input{width:140px;}
}
@media (max-width:1023px){
  .nav-toggle{display:block;}
  .nav-search{display:none;}
  .nav-links{position:fixed;left:0;right:0;top:70px;bottom:0;background:#fff;flex-direction:column;align-items:stretch;gap:0;margin:0;padding:10px 24px 36px;overflow-y:auto;transform:translateY(-12px);opacity:0;visibility:hidden;transition:transform .24s ease,opacity .24s ease,visibility .24s ease;}
  .nav-links.is-open{transform:none;opacity:1;visibility:visible;}
  .nav-links a{height:48px;display:flex;align-items:center;font-size:16.5px;border-bottom:1px solid #F1EDE7;padding:0;}
  .nav-links a::after{display:none;}
  .sec{padding:64px 0;}
  .intro-grid{grid-template-columns:1fr;gap:34px;}
  .intro-points{border-left:0;border-top:2px solid var(--brand-soft);padding-left:0;padding-top:24px;}
  .cat-hero h1{font-size:36px;}
  .zrow{gap:36px;}
  .band-grid{grid-template-columns:repeat(2,1fr);gap:28px;}
  .chain{grid-template-columns:repeat(2,1fr);gap:30px;}
  .chain__item{padding-right:0;}
  .chain__item::after{display:none;}
  .cta-band{padding:42px 30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .nav-bar{height:64px;gap:12px;}
  .nav-links{top:64px;}
  .nav-right .btn{height:42px;padding:0 16px;font-size:14px;}
  .cat-hero__inner{padding:44px 0 42px;}
  .cat-hero h1{font-size:30px;}
  .cat-hero p.sub{font-size:16.5px;}
  h2.sec-title{font-size:25px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .stat{border-left:0;border-top:1px solid var(--line);padding:20px 0;}
  .stat:nth-child(-n+2){border-top:0;}
  .stat b{font-size:26px;}
  .zrow{grid-template-columns:1fr;gap:24px;}
  .zrow--flip .zrow__media{order:0;}
  .metrics{grid-template-columns:1fr 1fr;gap:14px;}
  .metrics b{font-size:19px;}
  .scene-grid{grid-template-columns:1fr;}
  .data-band{padding:48px 0;}
  .data-band h2{font-size:24px;}
  .band-item b{font-size:32px;}
  .cta-band h2{font-size:25px;}
  .cta-band{padding:34px 22px;}
  .faq summary{font-size:16px;padding:14px 18px;}
  .faq .ans{padding:0 18px 20px;}
  .footer-grid{grid-template-columns:1fr;}
  .site-footer{margin-top:64px;}
}
@media (max-width:520px){
  .wrap{padding:0 18px;}
  .logo-txt em{display:none;}
  .logo-txt strong{font-size:16px;}
  .metrics{grid-template-columns:1fr;}
  .chain{grid-template-columns:1fr;}
  .btn{min-height:46px;}
  .cta-actions .btn{width:100%;}
  .crumb-bar{padding:12px 0;}
}

/* roulang page: category3 */
:root{
  --brand:#F0522A;--brand-dark:#C93E1C;--brand-soft:#FEF0EB;
  --tech:#0FA98E;--tech-soft:#E6F7F3;--pulse:#E4FF57;
  --ink:#1A1D21;--muted:#5A6472;--line:#E6E1DA;--line-soft:#ECE8E2;
  --bg:#FAF8F5;--card:#FFFFFF;--dark:#14181D;
  --r-card:16px;--r-lg:24px;--r-btn:12px;
  --sh:0 1px 2px rgba(20,24,29,.05),0 10px 26px -14px rgba(20,24,29,.14);
  --sh-hover:0 2px 6px rgba(20,24,29,.07),0 20px 36px -16px rgba(20,24,29,.24);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:var(--font-cn);background:var(--bg);color:var(--ink);font-size:16.5px;line-height:1.8;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,background-color .2s ease,border-color .2s ease}
a:hover{color:var(--brand-dark)}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:90;background:#fff;border-bottom:1px solid var(--line-soft);transition:box-shadow .25s ease}
.site-header.is-scrolled{box-shadow:0 8px 24px -16px rgba(20,24,29,.4)}
.nav-bar{display:flex;align-items:center;gap:26px;height:70px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink)}
.logo:hover{color:var(--ink)}
.logo-txt{display:flex;flex-direction:column;line-height:1.15}
.logo-txt strong{font-size:17px;font-weight:800;letter-spacing:-.01em}
.logo-txt em{font-style:normal;font-size:11.5px;color:var(--muted);letter-spacing:.18em}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{position:relative;font-size:15px;font-weight:500;color:var(--ink);padding:8px 0}
.nav-links a::after{content:"";position:absolute;left:50%;bottom:2px;width:0;height:2px;border-radius:2px;background:var(--brand);transform:translateX(-50%);transition:width .22s ease}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after{width:60%}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-links a.active::after{width:60%}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{display:flex;align-items:center;gap:8px;background:#F4F1EC;border:1px solid transparent;border-radius:999px;padding:0 14px;height:42px;transition:background-color .2s,border-color .2s,box-shadow .2s}
.nav-search input{border:0;background:transparent;outline:none;width:168px;font-size:14px}
.nav-search input::placeholder{color:#8A929B}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 2px rgba(240,82,42,.16)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:#fff;position:relative;cursor:pointer;padding:0}
.nav-toggle span{position:absolute;left:50%;top:50%;width:18px;height:2px;margin-top:-1px;border-radius:2px;background:var(--ink);transform:translateX(-50%);transition:background-color .2s}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--ink);transition:transform .25s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.site-header.nav-open .nav-toggle span{background:transparent}
.site-header.nav-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg)}
.site-header.nav-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- 按钮 / 徽章 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;transition:background-color .22s ease,color .22s ease,border-color .22s ease,transform .22s ease,box-shadow .22s ease}
.btn--primary{background:var(--brand);color:#fff;border-radius:999px;box-shadow:0 8px 18px -12px rgba(240,82,42,.9)}
.btn--primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px)}
.btn--ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.btn--light{background:#fff;color:var(--ink)}
.btn--light:hover{background:var(--brand-soft);color:var(--brand-dark)}
.badge{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;font-size:12.5px;font-weight:600;letter-spacing:.01em}
.badge--brand{background:var(--brand-soft);color:var(--brand-dark)}
.badge--tech{background:var(--tech-soft);color:#0B7D69}
.badge--line{background:#fff;border:1px solid var(--line);color:var(--muted)}

/* ---------- 面包屑 / Hero ---------- */
.crumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13.5px;color:var(--muted);padding:22px 0 0}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{color:#C3C9D1}
.crumbs .cur{color:var(--brand);font-weight:600}

.hero{position:relative;overflow:hidden;background:linear-gradient(155deg,#FFF6F1 0%,#FAF8F5 52%,#EFFAF6 100%);border-bottom:1px solid var(--line-soft)}
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(15,169,142,.22) 1.3px,transparent 1.3px);background-size:22px 22px;opacity:.55;-webkit-mask-image:linear-gradient(115deg,#000 0%,rgba(0,0,0,.15) 48%,transparent 66%);mask-image:linear-gradient(115deg,#000 0%,rgba(0,0,0,.15) 48%,transparent 66%)}
.hero__inner{position:relative;padding:52px 0 84px;max-width:880px}
.hero h1{font-size:52px;line-height:1.16;font-weight:800;letter-spacing:-.02em;margin:18px 0 16px}
.hero__sub{font-size:19px;color:var(--muted);max-width:700px;margin-bottom:30px}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px}
.hero__note{margin-top:18px;font-size:14px;color:var(--muted)}
.hero__note b{color:var(--ink);font-weight:700;font-variant-numeric:tabular-nums}

.compare-wrap{position:relative;z-index:5;margin-top:-40px}
.compare-strip{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh);overflow:hidden}
.cs{padding:20px 22px;border-right:1px solid var(--line)}
.cs:last-child{border-right:0}
.cs span{display:block;font-size:12.5px;color:var(--muted);margin-bottom:6px}
.cs strong{font-size:17px;font-weight:800;letter-spacing:-.01em;font-variant-numeric:tabular-nums}

/* ---------- 通用板块 ---------- */
.sec{padding:88px 0}
.sec--white{background:#fff}
.sec--tint{background:var(--bg)}
.sec-head{max-width:780px;margin-bottom:38px}
.sec-head h2{font-size:34px;line-height:1.26;font-weight:700;letter-spacing:-.015em;margin:14px 0 12px}
.sec-head p{color:var(--muted);font-size:16.5px}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}

/* ---------- 产品网格（三列） ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.p-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh);overflow:hidden;transition:transform .28s ease,box-shadow .28s ease}
.p-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.p-card__media{aspect-ratio:16/9;overflow:hidden;background:#F1EEE9}
.p-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.p-card:hover .p-card__media img{transform:scale(1.03)}
.p-card__body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.p-card__body h3{font-size:19px;font-weight:700;letter-spacing:-.01em}
.p-card__body p{font-size:15px;color:var(--muted);line-height:1.75}
.spec-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;border-top:1px dashed var(--line);padding-top:14px;margin-top:auto}
.spec-row div{display:flex;flex-direction:column;gap:2px}
.spec-row span{font-size:12.5px;color:var(--muted)}
.spec-row strong{font-size:15px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand)}
.link-arrow i{font-style:normal;transition:transform .22s ease}
.link-arrow:hover i{transform:translateX(4px)}

/* ---------- 选型对照 ---------- */
.cmp{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.cmp__row{display:grid;grid-template-columns:250px 1fr;gap:28px;padding:28px 32px;border-bottom:1px solid var(--line)}
.cmp__row:last-child{border-bottom:0}
.cmp__row:nth-child(even){background:#FAF8F5}
.cmp__label h3{font-size:20px;font-weight:700;margin:12px 0 0}
.cmp__body p{color:var(--muted);font-size:15.5px}
.kv{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.kv span{display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:999px;background:var(--tech-soft);color:#0B7D69;font-size:13px;font-weight:600;font-variant-numeric:tabular-nums}
.kv span:nth-child(2n){background:var(--brand-soft);color:var(--brand-dark)}

/* ---------- 适用场景 ---------- */
.scene-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.scene{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--sh);transition:transform .28s ease,box-shadow .28s ease}
.scene:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.scene__thumb{flex:0 0 124px;width:124px;height:96px;border-radius:14px;overflow:hidden;background:#F1EEE9}
.scene__thumb img{width:100%;height:100%;object-fit:cover}
.scene h3{font-size:17.5px;font-weight:700;margin-bottom:6px}
.scene p{font-size:14.6px;color:var(--muted);line-height:1.72}

/* ---------- 图文 + 清单 ---------- */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.split__fig{border-radius:var(--r-lg);overflow:hidden;background:#F1EEE9;aspect-ratio:16/10;box-shadow:var(--sh)}
.split__fig img{width:100%;height:100%;object-fit:cover}
.check-list{display:flex;flex-direction:column;gap:18px;margin-top:8px}
.check-list li{display:flex;gap:14px}
.check-list .dot{flex:0 0 26px;width:26px;height:26px;border-radius:999px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;font-variant-numeric:tabular-nums}
.check-list h3{font-size:17px;font-weight:700;margin-bottom:4px}
.check-list p{font-size:14.8px;color:var(--muted);line-height:1.72}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.faq{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;box-shadow:var(--sh)}
.faq summary{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:16px 20px;cursor:pointer;font-size:17px;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.plus{position:relative;flex:0 0 24px;width:24px;height:24px;border-radius:999px;background:var(--brand-soft);transition:transform .25s ease}
.plus::before,.plus::after{content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px}
.plus::before{width:11px;height:2px;transform:translate(-50%,-50%)}
.plus::after{width:2px;height:11px;transform:translate(-50%,-50%)}
.faq[open] .plus{transform:rotate(45deg)}
.faq__a{padding:2px 20px 20px;background:#FAF8F5;color:var(--muted);font-size:15.5px;line-height:1.8;border-top:1px solid var(--line-soft)}

/* ---------- 表单 ---------- */
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--sh)}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field--full{grid-column:1 / -1}
.field label{font-size:14px;font-weight:600;color:var(--ink)}
.field input,.field textarea,.field select{height:48px;border:1px solid #E1DCD5;border-radius:12px;padding:0 14px;background:#fff;outline:none;font-size:15px;transition:border-color .2s,box-shadow .2s}
.field textarea{height:auto;min-height:110px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--brand);box-shadow:0 0 0 2px rgba(240,82,42,.18)}
.form-tip{display:none;margin-top:14px;padding:12px 14px;border-radius:12px;background:var(--tech-soft);color:#0B7D69;font-size:14.5px}
.form-note{margin-top:14px;font-size:13.5px;color:var(--muted)}

/* ---------- CTA 带 ---------- */
.cta-band{position:relative;border-radius:var(--r-lg);overflow:hidden;padding:56px;color:#fff;background-color:var(--dark);background-image:linear-gradient(100deg,rgba(20,24,29,.95) 12%,rgba(20,24,29,.72) 70%),url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center}
.cta-band h2{font-size:34px;line-height:1.28;font-weight:700;letter-spacing:-.015em;max-width:640px;margin-bottom:14px}
.cta-band p{color:#D5D9DE;font-size:16.5px;max-width:620px;margin-bottom:28px}
.cta-band .row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.cta-band .contact{margin-top:22px;font-size:14.5px;color:#B9BFC7;display:flex;flex-wrap:wrap;gap:20px}
.cta-band .contact b{color:#fff;font-weight:700;font-variant-numeric:tabular-nums}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#B9BFC7;margin-top:0}
.top-line{height:3px;background:linear-gradient(90deg,var(--brand),var(--tech))}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px;padding:56px 0 36px}
.footer-brand .logo:hover{color:#fff}
.footer-brand .logo-txt strong{color:#fff}
.footer-brand .logo-txt em{color:#8A929B}
.footer-brand p{font-size:14.5px;line-height:1.85;color:#9AA3AD;margin:18px 0}
.footer-contact{display:flex;flex-direction:column;gap:6px;font-size:14px;color:#C7CDD4}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#B9BFC7;font-size:14.5px}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;border-top:1px solid rgba(255,255,255,.08);padding:18px 0 26px;font-size:13px;color:#8A929B}

/* ---------- 滚动显现 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .55s ease,transform .55s ease}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .nav-links{gap:20px}
  .nav-search input{width:130px}
}
@media (max-width:1023px){
  .sec{padding:64px 0}
  .hero h1{font-size:40px}
  .hero__inner{padding:44px 0 72px}
  .sec-head h2,.cta-band h2{font-size:29px}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr;gap:32px}
  .cmp__row{grid-template-columns:200px 1fr;gap:22px;padding:24px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
  .nav-search{display:none}
  .nav-toggle{display:block}
  .nav-links{position:fixed;left:0;right:0;top:70px;bottom:0;background:#fff;flex-direction:column;align-items:stretch;gap:0;padding:10px 24px 32px;overflow-y:auto;opacity:0;pointer-events:none;transform:translateY(-10px);transition:opacity .24s ease,transform .24s ease;z-index:80}
  .site-header.nav-open .nav-links{opacity:1;pointer-events:auto;transform:none}
  .nav-links a{height:52px;display:flex;align-items:center;font-size:16.5px;border-bottom:1px solid var(--line-soft)}
  .nav-links a::after{display:none}
}
@media (max-width:767px){
  body{font-size:16px}
  .sec{padding:48px 0}
  .hero h1{font-size:34px}
  .hero__sub{font-size:17px}
  .sec-head h2,.cta-band h2{font-size:25px}
  .sec-head{margin-bottom:28px}
  .compare-wrap{margin-top:-28px;overflow:hidden}
  .compare-strip{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
  .cs{flex:0 0 190px;border-right:1px solid var(--line);border-bottom:0;scroll-snap-align:start}
  .scene-list{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr;gap:16px}
  .form-card{padding:22px}
  .cmp__row{grid-template-columns:1fr;gap:14px;padding:22px}
  .cta-band{padding:32px 24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;padding:44px 0 28px}
  .footer-brand{grid-column:1 / -1}
  .btn{min-height:46px}
  .nav-right .btn--primary{height:42px;padding:0 16px;font-size:14px}
}
@media (max-width:639px){
  .grid-3{grid-template-columns:1fr}
  .spec-row{grid-template-columns:repeat(3,minmax(0,1fr))}
  .scene__thumb{flex-basis:104px;width:104px;height:84px}
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* roulang page: category4 */
:root{
  --brand:#F0522A;
  --brand-dark:#C93E1C;
  --brand-soft:#FEF0EB;
  --tech:#0FA98E;
  --tech-soft:#E6F7F3;
  --pulse:#E4FF57;
  --ink:#1A1D21;
  --ink-2:#5A6472;
  --line:#E6E1DA;
  --line-soft:#F1EDE7;
  --page:#FAF8F5;
  --card:#FFFFFF;
  --dark:#14181D;
  --radius-card:16px;
  --radius-lg:24px;
  --radius-btn:12px;
  --shadow-card:0 1px 2px rgba(20,24,29,.05), 0 10px 26px -14px rgba(20,24,29,.14);
  --shadow-hover:0 2px 6px rgba(20,24,29,.08), 0 18px 38px -16px rgba(20,24,29,.22);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.8;
  color:var(--ink);
  background:var(--page);
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
h1,h2,h3,h4{margin:0;line-height:1.32}
p{margin:0}
ol,ul{margin:0;padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-weight:800;letter-spacing:-.02em}

/* ===== 容器 ===== */
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:64px 0}
.section--alt{background:#FFFFFF}
.section--soft{background:var(--page)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .22s,color .22s,border-color .22s,transform .22s,box-shadow .22s;
}
.btn--primary{background:var(--brand);color:#fff;border-radius:999px;box-shadow:0 10px 22px -14px rgba(240,82,42,.9)}
.btn--primary:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn--ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn--ghost:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.btn--onDark{background:var(--brand);color:#fff;border-radius:999px}
.btn--onDark:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn--text{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:15px;transition:gap .22s}
.btn--text svg{transition:transform .22s}
.btn--text:hover svg{transform:translateX(4px)}

/* ===== 徽章 / 标签 ===== */
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.badge--brand{background:var(--brand-soft);color:var(--brand-dark)}
.badge--tech{background:var(--tech-soft);color:#0B7A67}
.chips{display:flex;gap:10px;flex-wrap:wrap}
.chip{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  background:#fff;border:1px solid var(--line);font-size:14px;color:var(--ink-2);
  transition:border-color .2s,color .2s,background .2s;
}
.chip:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:80;background:#fff;
  border-bottom:1px solid #ECE8E2;transition:box-shadow .25s;
}
.site-header.scrolled{box-shadow:0 8px 24px -18px rgba(20,24,29,.5)}
.nav-bar{height:70px;display:flex;align-items:center;gap:20px}
.logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-txt{display:flex;flex-direction:column;line-height:1.15}
.logo-txt strong{font-size:17px;font-weight:800;letter-spacing:-.01em}
.logo-txt em{font-size:11.5px;font-style:normal;color:var(--ink-2);letter-spacing:.16em}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:10px}
.nav-links a{
  position:relative;padding:9px 12px;font-size:15px;font-weight:500;border-radius:8px;
  transition:color .2s;
}
.nav-links a::after{
  content:"";position:absolute;left:20%;right:20%;bottom:2px;height:2px;border-radius:2px;
  background:var(--brand);transform:scaleX(0);transition:transform .25s;
}
.nav-links a:hover{color:var(--brand)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--brand);font-weight:600}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;align-items:center;gap:8px;height:40px;padding:0 14px;
  background:#F4F1EC;border:1px solid transparent;border-radius:999px;transition:.2s;
}
.nav-search:focus-within{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(240,82,42,.14)}
.nav-search input{border:0;background:transparent;outline:none;font-size:14px;width:168px;color:var(--ink)}
.nav-search input::placeholder{color:#8A929B}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:#fff;position:relative;cursor:pointer;
}
.nav-toggle span,.nav-toggle::before,.nav-toggle::after{
  content:"";position:absolute;left:12px;right:12px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform .25s,opacity .25s;
}
.nav-toggle::before{top:15px}
.nav-toggle span{top:21px}
.nav-toggle::after{top:27px}
.nav-toggle.open::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle.open span{opacity:0}
.nav-toggle.open::after{transform:translateY(-6px) rotate(-45deg)}

/* ===== 面包屑 ===== */
.breadcrumb{font-size:13.5px;color:#B9BFC7;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.breadcrumb a{color:#D6D2CC;transition:color .2s}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{opacity:.55}
.breadcrumb .current{color:#FFB79F}

/* ===== 分类页头图横幅 ===== */
.cat-hero{
  position:relative;min-height:270px;display:flex;align-items:flex-end;
  background-image:
    linear-gradient(90deg,rgba(20,24,29,.92) 0%,rgba(20,24,29,.72) 46%,rgba(20,24,29,.34) 100%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  overflow:hidden;
}
.cat-hero::after{
  content:"";position:absolute;right:-60px;bottom:-80px;width:320px;height:320px;border-radius:50%;
  border:1px solid rgba(228,255,87,.22);box-shadow:0 0 0 40px rgba(15,169,142,.06);
  pointer-events:none;
}
.cat-hero .wrap{position:relative;z-index:2;padding-top:44px;padding-bottom:38px}
.cat-hero h1{
  margin-top:16px;color:#fff;font-size:clamp(34px,4.6vw,50px);font-weight:800;letter-spacing:-.02em;
  max-width:760px;
}
.cat-hero__sub{margin-top:14px;font-size:18px;color:#CDD3D9;max-width:640px}
.cat-hero__tags{margin-top:22px;display:flex;gap:10px;flex-wrap:wrap}
.cat-hero__tags .badge{background:rgba(255,255,255,.12);color:#F2F4F6;border:1px solid rgba(255,255,255,.18)}
.cat-hero__tags .badge.is-tech{background:rgba(15,169,142,.22);color:#B9F2E7;border-color:rgba(15,169,142,.4)}

/* ===== 导语区 ===== */
.intro-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:48px;align-items:start}
.intro-lede{font-size:17px;line-height:1.9;color:#33383E}
.intro-lede strong{color:var(--ink)}
.point-list{display:grid;gap:0}
.point-item{padding:20px 0 20px 22px;border-left:2px solid var(--line);transition:border-color .25s}
.point-item:hover{border-left-color:var(--brand)}
.point-item .idx{font-size:12px;font-weight:800;letter-spacing:.14em;color:var(--brand);text-transform:uppercase}
.point-item h3{font-size:17px;font-weight:600;margin-top:6px}
.point-item p{font-size:14.5px;color:var(--ink-2);margin-top:6px}

/* ===== 指标条 ===== */
.stat-strip{
  margin-top:40px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);overflow:hidden;
}
.stat-cell{padding:26px 24px;border-right:1px solid var(--line-soft)}
.stat-cell:last-child{border-right:0}
.stat-cell .val{font-size:30px;color:var(--ink);display:flex;align-items:baseline;gap:4px}
.stat-cell .val i{font-style:normal;font-size:15px;font-weight:700;color:var(--brand)}
.stat-cell .cap{margin-top:6px;font-size:13px;color:var(--ink-2)}

/* ===== 标题组 ===== */
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
.sec-title{font-size:clamp(25px,3vw,34px);font-weight:700;letter-spacing:-.01em}
.sec-title .mark{color:var(--brand)}
.sec-desc{margin-top:12px;font-size:16px;color:var(--ink-2);max-width:680px}
.eyebrow{font-size:12.5px;font-weight:800;letter-spacing:.18em;color:var(--tech);text-transform:uppercase}

/* ===== 实施时间轴 ===== */
.timeline{margin-top:36px;display:grid}
.timeline__item{position:relative;display:grid;grid-template-columns:56px minmax(0,1fr);gap:24px;padding-bottom:26px}
.timeline__item:last-child{padding-bottom:0}
.timeline__item:not(:last-child)::before{
  content:"";position:absolute;left:27px;top:58px;bottom:4px;width:2px;
  background:linear-gradient(180deg,var(--line),#F3EFE9);
}
.timeline__marker{
  width:56px;height:56px;border-radius:50%;background:#fff;border:2px solid var(--brand);
  display:flex;align-items:center;justify-content:center;color:var(--brand);
  font-variant-numeric:tabular-nums;font-weight:800;font-size:16px;
  box-shadow:var(--shadow-card);position:relative;z-index:2;
}
.timeline__item.is-tech .timeline__marker{border-color:var(--tech);color:#0B7A67}
.timeline__body{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  padding:20px 24px;box-shadow:var(--shadow-card);transition:transform .25s,box-shadow .25s,border-color .25s;
}
.timeline__body:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:#EFDFD8}
.timeline__body h3{font-size:19px;font-weight:700}
.timeline__body p{margin-top:8px;font-size:15.5px;color:var(--ink-2)}
.timeline__meta{margin-top:12px;display:flex;gap:18px;flex-wrap:wrap;font-size:13.5px;color:var(--ink-2)}
.timeline__meta b{color:var(--ink);font-variant-numeric:tabular-nums}

/* ===== 规格对照表 ===== */
.table-scroll{
  margin-top:32px;overflow-x:auto;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-card);box-shadow:var(--shadow-card);
  -webkit-overflow-scrolling:touch;
}
.spec-table{width:100%;min-width:820px;border-collapse:collapse;font-size:15px}
.spec-table thead th{
  background:#F4F1EC;text-align:left;padding:15px 20px;font-size:13.5px;font-weight:700;
  color:var(--ink);white-space:nowrap;border-bottom:1px solid var(--line);
}
.spec-table tbody td{padding:15px 20px;border-top:1px solid var(--line-soft);color:var(--ink-2);vertical-align:top}
.spec-table tbody tr:nth-child(even){background:#FCFBF8}
.spec-table tbody td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
.spec-table tbody td .num{color:var(--ink)}
.table-note{margin-top:14px;font-size:13.5px;color:var(--ink-2)}

/* ===== 模块卡片 ===== */
.module-grid{margin-top:34px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.m-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .28s,box-shadow .28s,border-color .28s;
}
.m-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#EFDFD8}
.m-card__media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#F1EDE7}
.m-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .32s}
.m-card:hover .m-card__media img{transform:scale(1.03)}
.m-card__media .badge{position:absolute;left:14px;top:14px;background:#fff;color:var(--brand-dark);box-shadow:var(--shadow-card)}
.m-card__body{padding:24px}
.m-card__body h3{font-size:20px;font-weight:700}
.m-card__body p{margin-top:10px;font-size:15.5px;color:var(--ink-2)}
.m-card__foot{margin-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* ===== 流程要点列表 ===== */
.checklist{margin-top:16px;display:grid;gap:10px}
.checklist li{position:relative;padding-left:26px;font-size:15px;color:var(--ink-2)}
.checklist li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:8px;
  border-left:2px solid var(--tech);border-bottom:2px solid var(--tech);transform:rotate(-45deg);
}

/* ===== FAQ ===== */
.faq-grid{margin-top:32px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;align-items:start}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
  transition:border-color .22s,box-shadow .22s;
}
.faq-item.open{border-color:#F2C3B2;box-shadow:var(--shadow-card)}
.faq-q{
  width:100%;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;background:transparent;border:0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.5;
}
.faq-q:hover{color:var(--brand-dark)}
.faq-icon{
  position:relative;flex:0 0 24px;width:24px;height:24px;border-radius:50%;
  background:var(--brand-soft);transition:transform .25s,background .25s;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);transform:translate(-50%,-50%);
}
.faq-icon::before{width:11px;height:2px}
.faq-icon::after{width:2px;height:11px}
.faq-item.open .faq-icon{transform:rotate(45deg);background:#FBD9CE}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;background:var(--page)}
.faq-a p{padding:14px 20px 18px;font-size:15.5px;line-height:1.8;color:var(--ink-2)}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;background:var(--dark);color:#E8EAED;
  border-radius:var(--radius-lg);padding:48px;display:grid;
  grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:36px;align-items:center;
}
.cta-band::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(240,82,42,.32),transparent 68%);
}
.cta-band h2{font-size:clamp(24px,3vw,32px);font-weight:800;color:#fff;letter-spacing:-.01em;position:relative;z-index:2}
.cta-band p{margin-top:12px;font-size:16px;color:#B9BFC7;position:relative;z-index:2}
.cta-actions{display:flex;flex-direction:column;gap:14px;position:relative;z-index:2}
.cta-actions .btn{width:100%;height:48px}
.cta-contact{font-size:14.5px;color:#B9BFC7;display:flex;flex-direction:column;gap:6px}
.cta-contact b{color:#fff;font-variant-numeric:tabular-nums}

/* ===== 页脚 ===== */
.site-footer{background:var(--dark);color:#B9BFC7;margin-top:64px}
.site-footer .top-line{height:3px;background:linear-gradient(90deg,var(--brand),var(--tech))}
.footer-grid{padding:56px 0 40px;display:grid;grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-txt strong{color:#fff}
.footer-brand .logo-txt em{color:#8A929B}
.footer-brand p{font-size:14.5px;line-height:1.85;max-width:360px}
.footer-contact{margin-top:18px;font-size:14px;display:grid;gap:6px}
.footer-contact div{font-variant-numeric:tabular-nums}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col ul{display:grid;gap:11px}
.footer-col a{font-size:14.5px;color:#B9BFC7;transition:color .2s}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:20px 0 28px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13px;color:#8A929B;
}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .section{padding:56px 0}
  .nav-links{
    position:fixed;left:0;right:0;top:70px;bottom:0;background:#fff;
    flex-direction:column;align-items:stretch;gap:0;padding:12px 24px 32px;
    margin-left:0;transform:translateY(-10px);opacity:0;pointer-events:none;
    transition:opacity .24s,transform .24s;overflow-y:auto;
  }
  .nav-links.open{opacity:1;transform:none;pointer-events:auto}
  .nav-links a{height:48px;display:flex;align-items:center;padding:0 4px;font-size:16px;border-bottom:1px solid var(--line-soft)}
  .nav-links a::after{display:none}
  .nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .intro-grid{grid-template-columns:1fr;gap:28px}
  .stat-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat-cell:nth-child(2){border-right:0}
  .stat-cell:nth-child(1),.stat-cell:nth-child(2){border-bottom:1px solid var(--line-soft)}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
  .cta-band{grid-template-columns:1fr;padding:36px}
}
@media (max-width:768px){
  body{font-size:16px}
  .section{padding:48px 0}
  .cat-hero{min-height:240px}
  .cat-hero .wrap{padding-top:32px;padding-bottom:30px}
  .module-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:1fr;border-radius:var(--radius-card)}
  .stat-cell{border-right:0;border-bottom:1px solid var(--line-soft);padding:20px}
  .stat-cell:last-child{border-bottom:0}
  .timeline__item{grid-template-columns:44px minmax(0,1fr);gap:16px}
  .timeline__marker{width:44px;height:44px;font-size:14px}
  .timeline__item:not(:last-child)::before{left:21px;top:46px}
  .timeline__body{padding:18px}
  .cta-band{padding:28px;border-radius:var(--radius-card)}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding:40px 0 28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .nav-links a,.btn{min-height:46px}
}
@media (max-width:640px){
  .wrap{padding:0 18px}
  .logo-txt strong{font-size:16px}
  .cat-hero__sub{font-size:16px}
  .m-card__body{padding:20px}
}