/* roulang page: index */
:root{
  --brand:#0ED39A;
  --brand-2:#6FE7A8;
  --brand-3:#C9F5D8;
  --accent:#FF6A1F;
  --bg:#F3F7F5;
  --card:#FFFFFF;
  --dark:#0B1512;
  --line:#E2EAE5;
  --text:#16211C;
  --muted:#5D6C65;
  --inv-muted:rgba(255,255,255,.72);
  --grad:linear-gradient(135deg,#0ED39A 0%,#6FE7A8 55%,#C9F5D8 100%);
  --r-lg:22px;
  --r-md:16px;
  --r-sm:12px;
  --r-pill:999px;
  --sh:0 6px 22px rgba(11,21,18,.07);
  --sh-hover:0 16px 36px rgba(11,21,18,.13);
  --sec:96px;
  --container:1200px;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.85;
  padding-bottom:84px;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;text-underline-offset:3px;transition:color .2s ease}
a:hover{color:#0ab985;text-decoration:underline}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:-.01em}
h1{font-size:clamp(28px,4.6vw,50px);line-height:1.15}
h2{font-size:clamp(24px,3vw,34px);line-height:1.25}
h3{font-size:20px;font-weight:600}
p{margin:0 0 16px;max-width:72ch}
:focus-visible{outline:3px solid rgba(14,211,154,.35);outline-offset:2px;border-radius:6px}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:var(--sec) 0}
.section--tight{padding:64px 0}
.section-head{max-width:760px;margin-bottom:44px}
.section-head .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--brand);text-transform:uppercase;margin-bottom:12px}
.eyebrow::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--grad)}
.section-head p{color:var(--muted);margin-bottom:0}
.dark{background:var(--dark);color:#fff}
.dark h2,.dark h3{color:#fff}
.dark p{color:var(--inv-muted)}
.band{background:#EAF2EE}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(1.4) blur(6px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(11,21,18,.08)}
.nav-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--text);letter-spacing:-.02em}
.brand:hover{color:var(--text);text-decoration:none}
.brand-mark{
  width:36px;height:36px;border-radius:12px;background:var(--grad);
  display:grid;place-items:center;color:#05130D;font-weight:800;font-size:15px;
  box-shadow:0 6px 14px rgba(14,211,154,.32);
}
.brand-text b{font-weight:800}
.brand-text span{color:var(--brand)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto;list-style:none;padding:0;margin-bottom:0}
.nav-links a{
  position:relative;display:block;padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:600;color:#2A3833;
}
.nav-links a:hover{background:#F1F7F4;color:var(--text);text-decoration:none}
.nav-links a.active{color:var(--text)}
.nav-links a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;border-radius:2px;background:var(--brand);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 20px;border-radius:var(--r-pill);
  background:var(--grad);color:#05130D;font-weight:700;font-size:15px;
  border:none;box-shadow:0 8px 18px rgba(14,211,154,.28);white-space:nowrap;
}
.nav-cta:hover{color:#05130D;text-decoration:none;transform:translateY(-1px);filter:brightness(1.06)}

/* ---------- buttons ---------- */
.btn-main,.btn-ghost,.btn-outline{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 30px;border-radius:var(--r-pill);font-weight:700;font-size:16px;
  transition:transform .2s ease,box-shadow .25s ease,background .25s ease,filter .2s ease;
  border:none;cursor:pointer;
}
.btn-main{background:var(--grad);color:#05130D;box-shadow:0 10px 24px rgba(14,211,154,.3)}
.btn-main:hover{filter:brightness(1.06);transform:translateY(-2px);color:#05130D;text-decoration:none;box-shadow:var(--sh-hover)}
.btn-outline{background:transparent;color:var(--brand);border:1.5px solid var(--brand)}
.btn-outline:hover{background:rgba(14,211,154,.08);color:var(--brand);text-decoration:none;transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.06);color:#fff;border:1.5px solid rgba(255,255,255,.3)}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff;text-decoration:none;transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14px}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--dark);color:#fff;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
  opacity:.28;
}
.hero::after{
  content:"";position:absolute;width:560px;height:560px;right:-160px;top:-200px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,211,154,.28) 0%,rgba(14,211,154,0) 68%);
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:6fr 5fr;gap:52px;align-items:center;padding:96px 0 88px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:var(--r-pill);font-size:13px;font-weight:600;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);color:#fff;
}
.pill i{color:var(--brand);font-size:12px}
.pill--accent{border-color:rgba(255,106,31,.5);color:#FFD9C2}
.pill--accent i{color:var(--accent)}
.hero h1{color:#fff;margin-bottom:18px}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:17px;color:var(--inv-muted);max-width:34em;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px}
.hero-stats{display:flex;flex-wrap:wrap;gap:12px}
.stat-chip{
  display:flex;align-items:center;gap:10px;padding:9px 16px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);font-size:13px;color:var(--inv-muted);
}
.stat-chip .dot{width:8px;height:8px;border-radius:50%;background:var(--brand)}
.stat-chip .dot.orange{background:var(--accent)}
.stat-chip b{color:#fff;font-size:16px;font-variant-numeric:tabular-nums}
.hero-visual{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid rgba(255,255,255,.14);box-shadow:0 24px 50px rgba(0,0,0,.32)}
.hero-visual img{width:100%;aspect-ratio:16/9;object-fit:cover}
.hero-visual .float-card{
  position:absolute;left:18px;bottom:18px;right:18px;
  background:rgba(11,21,18,.78);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-md);padding:14px 18px;font-size:13px;color:var(--inv-muted);
  display:flex;align-items:center;gap:12px;
}
.hero-visual .float-card strong{color:#fff;font-size:15px;display:block;font-weight:700}
.hero-visual .float-card i{color:var(--brand);font-size:18px}

/* ---------- services ---------- */
.svc-grid{display:grid;grid-template-columns:2.2fr 1fr;gap:24px}
.svc-main{
  background:var(--card);border-radius:var(--r-lg);padding:40px;border:1px solid var(--line);
  box-shadow:var(--sh);display:flex;flex-direction:column;gap:18px;position:relative;overflow:hidden;
}
.svc-main .num{font-size:44px;font-weight:800;color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text;line-height:1;font-variant-numeric:tabular-nums}
.svc-side{display:grid;gap:24px}
.svc-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px;box-shadow:var(--sh);transition:transform .25s ease,box-shadow .25s ease;
}
.svc-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.svc-card .num{font-size:22px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums;letter-spacing:.04em}
.svc-card h3{margin:8px 0 8px}
.svc-card p{font-size:14px;color:var(--muted);margin:0}
.svc-main h3{margin-top:4px}
.svc-main p{color:var(--muted);margin-bottom:0}
.svc-list{list-style:none;padding:0;margin:6px 0 0;display:grid;gap:10px}
.svc-list li{display:flex;gap:10px;font-size:15px;color:var(--muted)}
.svc-list i{color:var(--brand);margin-top:6px;font-size:13px}

/* ---------- stats dark ---------- */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:36px}
.stat-box{
  border:1px solid rgba(255,255,255,.12);border-radius:var(--r-md);padding:26px 22px;
  background:rgba(255,255,255,.03);
}
.stat-box b{display:block;font-size:clamp(28px,3.4vw,40px);font-weight:800;font-variant-numeric:tabular-nums;color:#fff;line-height:1.1}
.stat-box b span{font-size:15px;font-weight:600;color:var(--brand);margin-left:4px}
.stat-box p{margin:8px 0 0;font-size:14px;color:var(--inv-muted)}

/* ---------- scenes ---------- */
.scene-grid{display:grid;grid-template-columns:1.6fr 1fr;grid-template-rows:auto auto;gap:24px}
.scene-big{
  grid-row:span 2;position:relative;border-radius:var(--r-lg);overflow:hidden;min-height:380px;
  display:flex;align-items:flex-end;border:1px solid var(--line);
}
.scene-big img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 2.4s ease}
.scene-big:hover img{transform:scale(1.03)}
.scene-big .mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,21,18,.12) 0%,rgba(11,21,18,.86) 100%)}
.scene-big .content{position:relative;z-index:2;padding:32px;color:#fff}
.scene-big .content h3{color:#fff;margin-bottom:8px}
.scene-big .content p{color:var(--inv-muted);font-size:14px;margin:0}
.scene-small{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);padding:26px;
  box-shadow:var(--sh);display:flex;gap:16px;align-items:flex-start;
  transition:transform .25s ease,box-shadow .25s ease;
}
.scene-small:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.scene-small .ico{
  width:44px;height:44px;flex:0 0 44px;border-radius:14px;display:grid;place-items:center;
  background:#E8F8F1;color:var(--brand);font-size:18px;
}
.scene-small h3{font-size:18px;margin-bottom:6px}
.scene-small p{font-size:14px;color:var(--muted);margin:0}

/* ---------- plans ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.plan-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 28px;box-shadow:var(--sh);display:flex;flex-direction:column;gap:14px;
  transition:transform .25s ease,box-shadow .25s ease;
}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.plan-card h3{margin:0}
.plan-card .tag{font-size:12px;font-weight:700;color:var(--muted);letter-spacing:.08em;text-transform:uppercase}
.plan-card ul{list-style:none;padding:0;margin:6px 0 0;display:grid;gap:9px}
.plan-card li{display:flex;gap:9px;font-size:14px;color:var(--muted)}
.plan-card li i{color:var(--brand);margin-top:6px;font-size:12px}
.plan-card .foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.plan-card--best{
  transform:translateY(-12px);border-color:rgba(14,211,154,.5);
  box-shadow:0 18px 40px rgba(11,21,18,.13);
}
.plan-card--best:hover{transform:translateY(-16px)}
.plan-card--best::before{content:"";display:block;height:6px;margin:-32px -28px 6px;border-radius:var(--r-lg) var(--r-lg) 0 0;background:var(--dark)}
.plan-badge{
  align-self:flex-start;display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--r-pill);background:rgba(255,106,31,.12);
  color:var(--accent);font-size:12px;font-weight:700;
}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.news-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--sh);
  transition:transform .25s ease,box-shadow .25s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover)}
.news-card .thumb{aspect-ratio:4/3;overflow:hidden;background:#E8F1ED}
.news-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 2.4s ease}
.news-card:hover .thumb img{transform:scale(1.03)}
.news-card .body{padding:22px 22px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.cat-chip{
  align-self:flex-start;padding:4px 12px;border-radius:var(--r-pill);
  background:#E8F8F1;color:#0a9d74;font-size:12px;font-weight:700;
}
.news-card h3{font-size:18px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card h3 a{color:var(--text)}
.news-card h3 a:hover{color:var(--brand);text-decoration:none}
.news-card .excerpt{
  font-size:14px;color:var(--muted);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted);
  font-variant-numeric:tabular-nums;
}
.news-card .meta .more{font-weight:700;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.empty-state{
  grid-column:1/-1;background:var(--card);border:1px dashed var(--line);border-radius:var(--r-lg);
  padding:56px 24px;text-align:center;color:var(--muted);
}
.empty-state i{font-size:30px;color:var(--brand);display:block;margin-bottom:14px}
.empty-state p{margin:0 auto 18px;max-width:32em}

/* ---------- faq ---------- */
.faq-wrap{max-width:900px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;background:none;border:none;text-align:left;cursor:pointer;
  display:flex;align-items:center;gap:16px;padding:22px 4px 22px 0;
  font-size:17px;font-weight:600;color:var(--text);
}
.faq-q:hover{color:var(--brand)}
.faq-item.open .faq-q{color:var(--brand)}
.faq-item.open .faq-q::before{content:"";width:4px;align-self:stretch;border-radius:2px;background:var(--brand);margin-right:-4px}
.faq-q .sign{
  margin-left:auto;flex:0 0 30px;width:30px;height:30px;border-radius:50%;
  border:1.5px solid var(--line);display:grid;place-items:center;color:var(--muted);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;font-size:14px;
}
.faq-item.open .sign{border-color:var(--brand);color:var(--brand);transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-a p{padding:0 46px 22px 14px;margin:0;color:var(--muted);font-size:15px}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:28px;align-items:start}
.form-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:34px;box-shadow:var(--sh)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{margin-bottom:18px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.field label .req{color:var(--accent);margin-left:3px}
.field input,.field textarea,.field select{
  width:100%;padding:13px 15px;border-radius:var(--r-sm);border:1px solid var(--line);
  background:#fff;font-size:15px;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{min-height:130px;resize:vertical}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(14,211,154,.16);
}
.field .hint{font-size:13px;color:var(--muted);margin-top:6px}
.form-card .btn-main{width:100%}
.info-card{
  background:var(--dark);color:#fff;border-radius:var(--r-lg);padding:34px;
  display:flex;flex-direction:column;gap:20px;
}
.info-card h3{color:#fff}
.info-card p{color:var(--inv-muted);font-size:14px;margin:0}
.info-list{list-style:none;padding:0;margin:0;display:grid;gap:16px}
.info-list li{display:flex;gap:14px;align-items:flex-start;font-size:14px;color:var(--inv-muted)}
.info-list .ico{
  width:38px;height:38px;flex:0 0 38px;border-radius:12px;display:grid;place-items:center;
  background:rgba(14,211,154,.14);color:var(--brand);font-size:15px;
}
.info-list b{display:block;color:#fff;font-size:15px;font-weight:700;margin-bottom:2px}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#fff;padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
.site-footer h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:700}
.site-footer p{color:var(--inv-muted);font-size:14px;margin:0}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:#fff;margin-bottom:14px}
.footer-links{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.footer-links a{color:var(--inv-muted);font-size:14px}
.footer-links a:hover{color:var(--brand);text-decoration:none}
.footer-bottom{
  margin-top:56px;border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0 calc(22px + env(safe-area-inset-bottom));
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- mobile tab ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:1040;
  display:none;background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -6px 18px rgba(11,21,18,.07);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar ul{display:flex;list-style:none;margin:0;padding:0}
.tabbar li{flex:1}
.tabbar a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:60px;font-size:11px;font-weight:600;color:var(--muted);
}
.tabbar a:hover{text-decoration:none;color:var(--brand)}
.tabbar a i{font-size:18px}
.tabbar a.active{color:var(--brand);font-weight:800}
.tabbar svg{width:21px;height:21px;stroke:currentColor;fill:none;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
.tabbar a.active svg{stroke:var(--brand)}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  :root{--sec:88px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991px){
  body{padding-bottom:88px}
  .nav-links,.nav-cta{display:none}
  .tabbar{display:block}
  :root{--sec:72px}
  .hero-inner{grid-template-columns:1fr;gap:34px;padding:64px 0 60px}
  .svc-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr;grid-template-rows:none}
  .scene-big{grid-row:auto;min-height:300px}
  .plan-grid{grid-template-columns:1fr;gap:22px}
  .plan-card--best{transform:none}
  .plan-card--best:hover{transform:translateY(-4px)}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  body{font-size:15px;padding-bottom:92px}
  :root{--sec:58px}
  .container{padding:0 16px}
  .hero-sub{font-size:16px}
  .btn-main,.btn-ghost,.btn-outline{width:100%}
  .hero-actions{flex-direction:column}
  .svc-main{padding:28px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:16px}
  .news-grid{grid-template-columns:1fr;gap:20px}
  .form-row{grid-template-columns:1fr;gap:0}
  .form-card,.info-card{padding:24px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
  .faq-q{font-size:16px}
}
@media (max-width:520px){
  .brand-text{font-size:16px}
  .stat-chip{font-size:12px;padding:8px 13px}
  .tabbar a{font-size:10px}
}

/* roulang page: article */
:root{
  --brand:#0ED39A;
  --brand-2:#6FE7A8;
  --brand-3:#C9F5D8;
  --accent:#FF6A1F;
  --bg:#F3F7F5;
  --card:#FFFFFF;
  --dark:#0B1512;
  --line:#E2EAE5;
  --text:#16211C;
  --muted:#5D6C65;
  --inv-muted:rgba(255,255,255,.72);
  --grad:linear-gradient(135deg,#0ED39A 0%,#6FE7A8 55%,#C9F5D8 100%);
  --r-lg:22px;
  --r-md:16px;
  --r-sm:14px;
  --r-xs:12px;
  --r-img:18px;
  --sh-1:0 6px 22px rgba(11,21,18,.07);
  --sh-2:0 16px 36px rgba(11,21,18,.13);
  --sec:96px;
  --gutter:24px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:17px;
  line-height:1.85;
  padding-bottom:84px;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;text-underline-offset:3px}
a:hover{text-decoration:underline}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text)}
h1{font-size:clamp(28px,4.6vw,50px);line-height:1.15}
h2{font-size:clamp(24px,3vw,34px);line-height:1.25}
h3{font-size:20px;line-height:1.4;font-weight:600}
p{margin:0 0 18px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
:focus-visible{outline:3px solid rgba(14,211,154,.35);outline-offset:2px;border-radius:6px}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(11,21,18,.08)}
.nav-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-mark{
  width:40px;height:40px;border-radius:13px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;color:#05130D;letter-spacing:.5px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-size:16px;font-weight:800;color:var(--text)}
.brand-text span{font-size:11px;color:var(--muted);letter-spacing:2px}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0 0 0 auto;padding:0}
.nav-links a{
  display:block;padding:10px 12px;font-size:15px;color:var(--text);
  border-radius:10px;position:relative;text-decoration:none;white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:var(--brand);background:rgba(14,211,154,.08)}
.nav-links a.active{color:var(--brand);font-weight:700}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:3px;
  border-radius:3px;background:var(--brand);
}
.nav-cta{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  padding:11px 22px;border-radius:999px;background:var(--grad);
  color:#05130D;font-weight:700;font-size:15px;text-decoration:none;
  box-shadow:0 6px 18px rgba(14,211,154,.32);
  transition:transform .2s ease,filter .2s ease;
}
.nav-cta:hover{filter:brightness(1.06);transform:translateY(-2px);text-decoration:none}

/* bottom tab */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;background:#fff;
  border-top:1px solid var(--line);box-shadow:0 -6px 20px rgba(11,21,18,.06);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar ul{display:flex;list-style:none;margin:0;padding:0}
.tabbar li{flex:1}
.tabbar a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:60px;font-size:11px;color:var(--muted);text-decoration:none;
}
.tabbar a i{font-size:17px;line-height:1}
.tabbar a:hover,.tabbar a.active{color:var(--brand);font-weight:700;text-decoration:none}
.tabbar a.active i{color:var(--brand)}

/* breadcrumb */
.crumb{padding:26px 0 0;font-size:13px;color:var(--muted)}
.crumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li+li::before{content:"/";color:var(--line)}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--brand)}
.crumb .now{color:var(--brand)}

/* article */
.article-wrap{padding:22px 0 var(--sec)}
.article-head{max-width:820px;margin:0 auto}
.chip{
  display:inline-flex;align-items:center;gap:7px;padding:5px 14px;border-radius:999px;
  background:rgba(14,211,154,.12);color:#0a8f6a;font-size:13px;font-weight:700;
}
.chip::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--brand)}
.article-head h1{margin:16px 0 14px;font-size:clamp(26px,3.6vw,40px);line-height:1.25}
.meta-row{
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;
  font-size:13px;color:var(--muted);padding-bottom:22px;border-bottom:1px solid var(--line);
}
.meta-row span{display:flex;align-items:center;gap:6px}
.meta-row .sep{color:var(--line)}
.article-body{
  max-width:760px;margin:32px auto 0;font-size:17px;line-height:1.85;color:var(--text);
}
.article-body h2{
  font-size:clamp(21px,2.4vw,26px);margin:40px 0 14px;padding-left:14px;
  border-left:4px solid var(--brand);line-height:1.35;
}
.article-body h3{margin:28px 0 10px;font-size:19px}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 20px}
.article-body li{margin-bottom:10px}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;background:rgba(14,211,154,.08);
  border-left:4px solid var(--brand);border-radius:0 14px 14px 0;color:#20463a;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
  border-radius:var(--r-img);border:1px solid var(--line);margin:8px auto;
}
.article-body table{
  width:100%;border-collapse:collapse;margin:22px 0;display:block;overflow-x:auto;
  font-size:15px;
}
.article-body th,.article-body td{
  border:1px solid var(--line);padding:10px 14px;text-align:left;white-space:nowrap;
}
.article-body th{background:#fff;font-weight:700}
.article-body a{color:var(--brand);font-weight:600}
.article-body code{
  background:#eef5f1;padding:2px 6px;border-radius:6px;font-size:15px;
}
.empty-box{
  max-width:760px;margin:32px auto 0;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:44px 28px;text-align:center;box-shadow:var(--sh-1);
}
.empty-box i{font-size:34px;color:var(--brand)}
.empty-box h2{font-size:22px;margin:14px 0 8px}
.empty-box p{color:var(--muted);margin-bottom:20px}

.tag-row{display:flex;flex-wrap:wrap;gap:10px;max-width:760px;margin:38px auto 0}
.tag{
  font-size:13px;padding:6px 14px;border-radius:999px;background:#fff;
  border:1px solid var(--line);color:var(--muted);
}
.tag:hover{border-color:var(--brand);color:var(--brand);text-decoration:none}
.post-nav{
  display:flex;justify-content:space-between;gap:16px;max-width:760px;margin:26px auto 0;
  flex-wrap:wrap;
}
.post-nav a{
  flex:1 1 200px;display:flex;align-items:center;gap:10px;padding:14px 18px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
  color:var(--text);font-size:14px;text-decoration:none;transition:.22s ease;
}
.post-nav a:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);text-decoration:none}

/* related */
.related{padding:0 0 var(--sec)}
.sec-head{max-width:760px;margin:0 auto 26px}
.sec-head h2{font-size:clamp(22px,2.6vw,28px)}
.sec-head p{color:var(--muted);margin:8px 0 0;font-size:15px}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;max-width:1040px;margin:0 auto}
.rel-card{
  display:flex;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:14px;box-shadow:var(--sh-1);transition:transform .24s ease,box-shadow .24s ease;
  text-decoration:none;color:inherit;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);text-decoration:none}
.rel-thumb{width:88px;height:88px;flex:0 0 88px;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 2.4s ease}
.rel-card:hover .rel-thumb img{transform:scale(1.03)}
.rel-txt{display:flex;flex-direction:column;justify-content:center;min-width:0}
.rel-txt h3{font-size:15px;line-height:1.5;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-txt time{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}

/* cta */
.cta-band{
  background:var(--dark);border-radius:var(--r-lg);padding:44px 36px;
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
  max-width:1040px;margin:0 auto;
}
.cta-band h2{color:#fff;font-size:clamp(21px,2.4vw,27px);margin-bottom:8px}
.cta-band p{color:var(--inv-muted);margin:0;font-size:15px;max-width:56ch}
.btn-main{
  display:inline-flex;align-items:center;gap:9px;padding:14px 30px;border-radius:999px;
  background:var(--grad);color:#05130D;font-weight:700;font-size:16px;text-decoration:none;
  transition:transform .2s ease,filter .2s ease;border:0;
}
.btn-main:hover{filter:brightness(1.06);transform:translateY(-2px);text-decoration:none}
.btn-ghost{
  display:inline-flex;align-items:center;gap:9px;padding:13px 28px;border-radius:999px;
  border:1.5px solid var(--brand);color:var(--brand);font-weight:700;font-size:16px;
  background:transparent;text-decoration:none;transition:.2s ease;
}
.btn-ghost:hover{background:rgba(14,211,154,.08);text-decoration:none}

/* footer */
.site-footer{background:var(--dark);color:#fff;padding:66px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;margin-bottom:14px}
.site-footer p{color:var(--inv-muted);font-size:14px;line-height:1.75;max-width:38ch}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
.footer-links{list-style:none;margin:0;padding:0}
.footer-links li{margin-bottom:10px}
.footer-links a{color:var(--inv-muted);font-size:14px;text-decoration:none;transition:color .2s ease}
.footer-links a:hover{color:var(--brand);text-decoration:none}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.12);padding:20px 0;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--inv-muted);
}

@media (max-width:1199px){
  .rel-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:991px){
  body{padding-bottom:84px}
  .nav-links,.nav-cta{display:none}
  .brand{margin-right:auto}
  :root{--sec:64px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .rel-grid{grid-template-columns:1fr 1fr}
  .cta-band{padding:34px 24px}
}
@media (max-width:767px){
  body{font-size:16px}
  .article-body{font-size:16px}
  .rel-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .post-nav a{flex:1 1 100%}
  .cta-band{flex-direction:column;align-items:flex-start}
  .btn-main,.btn-ghost{width:100%;justify-content:center}
}

/* roulang page: category2 */
:root{
  --brand:#0ED39A;
  --brand-deep:#0BB783;
  --accent:#FF6A1F;
  --bg:#F3F7F5;
  --card:#FFFFFF;
  --dark:#0B1512;
  --line:#E2EAE5;
  --text:#16211C;
  --muted:#5D6C65;
  --on-dark:#FFFFFF;
  --on-dark-muted:rgba(255,255,255,.72);
  --grad:linear-gradient(135deg,#0ED39A 0%,#6FE7A8 55%,#C9F5D8 100%);
  --r-lg:22px;
  --r-md:16px;
  --r-sm:12px;
  --r-img:18px;
  --shadow:0 6px 22px rgba(11,21,18,.07);
  --shadow-hover:0 16px 36px rgba(11,21,18,.13);
  --section-y:96px;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  padding-bottom:0;
}
img{max-width:100%;display:block;}
a{color:var(--brand-deep);text-decoration:none;text-underline-offset:3px;transition:color .22s ease,background-color .22s ease,border-color .22s ease;}
a:hover{color:var(--brand);text-decoration:underline;}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(14,211,154,.35);outline-offset:2px;border-radius:6px;}
h1,h2,h3,h4{margin:0;font-weight:700;color:var(--text);letter-spacing:.2px;}
h1{font-size:clamp(28px,4.6vw,50px);line-height:1.15;}
h2{font-size:clamp(24px,3vw,34px);line-height:1.25;}
h3{font-size:21px;line-height:1.4;font-weight:600;}
p{margin:0 0 16px;max-width:72ch;}
ul,ol{margin:0 0 16px;padding-left:0;list-style:none;}
.container{max-width:1200px;padding-left:20px;padding-right:20px;margin:0 auto;width:100%;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(11,21,18,.08);}
.nav-inner{display:flex;align-items:center;gap:24px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:var(--grad);
  color:#05130D;font-weight:800;font-size:15px;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:.5px;
}
.brand-text{display:flex;align-items:baseline;gap:2px;font-size:18px;font-weight:800;color:var(--text);}
.brand-text span{color:var(--brand-deep);font-weight:700;font-size:17px;}
.nav-links{display:flex;align-items:center;gap:6px;margin:0;padding:0;list-style:none;margin-left:auto;}
.nav-links a{
  display:inline-block;position:relative;
  padding:8px 12px;font-size:15px;font-weight:600;color:var(--muted);
  border-radius:10px;
}
.nav-links a:hover{color:var(--text);background:rgba(14,211,154,.09);text-decoration:none;}
.nav-links a.active{color:var(--text);}
.nav-links a.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:3px;
  border-radius:3px;background:var(--grad);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 20px;border-radius:999px;
  background:var(--grad);color:#05130D;font-weight:700;font-size:15px;
  box-shadow:0 6px 18px rgba(14,211,154,.28);
  transition:transform .22s ease,filter .22s ease;
  white-space:nowrap;
}
.nav-cta:hover{filter:brightness(1.06);transform:translateY(-2px);color:#05130D;text-decoration:none;}

/* ---------- page header ---------- */
.page-head{
  position:relative;overflow:hidden;
  background:#fff;border-bottom:1px solid var(--line);
  padding:52px 0 46px;
}
.page-head::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(560px 320px at 88% 12%,rgba(14,211,154,.22),transparent 68%),
    radial-gradient(420px 260px at 6% 96%,rgba(111,231,168,.16),transparent 70%);
  pointer-events:none;
}
.page-head .container{position:relative;z-index:1;}
.crumb{font-size:13px;color:var(--muted);margin-bottom:16px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand-deep);}
.crumb span.sep{opacity:.55;}
.crumb .current{color:var(--brand-deep);font-weight:600;}
.page-head h1{max-width:22ch;}
.page-head .lede{margin:18px 0 0;font-size:17px;color:var(--muted);max-width:68ch;}
.page-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.tag-pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;border-radius:999px;
  background:rgba(14,211,154,.11);
  border:1px solid rgba(14,211,154,.28);
  font-size:13px;font-weight:600;color:#0A6A4F;
}
.tag-pill.orange{background:rgba(255,106,31,.09);border-color:rgba(255,106,31,.28);color:#A33F0A;}
.tag-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);}
.tag-pill.orange .dot{background:var(--accent);}

/* ---------- layout ---------- */
.page-body{padding:72px 0 40px;}
.layout{display:grid;grid-template-columns:262px minmax(0,1fr);gap:52px;align-items:start;}

/* anchor nav */
.anchor-col{position:sticky;top:100px;}
.anchor-card{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:22px 20px;box-shadow:var(--shadow);
}
.anchor-card h4{font-size:14px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin-bottom:14px;font-weight:700;}
.anchor-list{display:flex;flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;}
.anchor-list a{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:10px;
  font-size:14.5px;font-weight:600;color:var(--muted);
  border-left:3px solid transparent;
  transition:all .2s ease;
}
.anchor-list a:hover{background:rgba(14,211,154,.09);color:var(--text);text-decoration:none;}
.anchor-list a.active{background:rgba(14,211,154,.12);color:#0A6A4F;border-left-color:var(--brand);}
.anchor-note{
  margin-top:18px;padding-top:16px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--muted);line-height:1.7;
}
/* mobile chip row */
.anchor-scroll{display:none;}

/* content */
.content-col{min-width:0;}
.section-block{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);box-shadow:var(--shadow);
  padding:34px 36px;margin-bottom:26px;
  scroll-margin-top:100px;
}
.section-block h2{
  display:flex;align-items:center;gap:12px;
  font-size:clamp(21px,2.4vw,27px);margin-bottom:16px;
}
.section-block h2 .idx{
  flex:0 0 auto;width:36px;height:36px;border-radius:11px;
  background:rgba(14,211,154,.14);color:#0A6A4F;
  font-size:14px;font-weight:800;display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
}
.section-block h3{font-size:18px;margin:26px 0 12px;color:var(--text);}
.section-block p{color:#2B3833;}
.section-block p:last-child{margin-bottom:0;}

.check-list{margin:18px 0 0;}
.check-list li{
  position:relative;padding-left:30px;margin-bottom:12px;
  font-size:15.5px;color:#2B3833;line-height:1.8;
}
.check-list li::before{
  content:"";position:absolute;left:2px;top:11px;
  width:14px;height:8px;border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(-45deg);border-radius:1px;
}
.num-list{margin:18px 0 0;counter-reset:step;}
.num-list li{
  position:relative;padding-left:44px;margin-bottom:14px;
  counter-increment:step;font-size:15.5px;color:#2B3833;line-height:1.8;
}
.num-list li::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;left:0;top:3px;
  font-size:13px;font-weight:800;color:#0A6A4F;
  background:rgba(14,211,154,.14);border-radius:8px;
  padding:2px 8px;font-variant-numeric:tabular-nums;
}

.tip-box{
  border-radius:var(--r-md);
  padding:18px 20px 18px 20px;
  margin:22px 0 4px;
  font-size:15px;line-height:1.8;
  border-left:4px solid var(--brand);
  background:rgba(14,211,154,.08);
  color:#16453A;
}
.tip-box .tip-title{display:flex;align-items:center;gap:8px;font-weight:700;margin-bottom:6px;color:#0A6A4F;}
.tip-box.warn{border-left-color:var(--accent);background:rgba(255,106,31,.07);color:#6E3208;}
.tip-box.warn .tip-title{color:#A33F0A;}
.tip-box p{margin:0;color:inherit;font-size:15px;}

.device-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:20px;}
.device-item{
  background:#F8FBF9;border:1px solid var(--line);border-radius:var(--r-md);
  padding:18px 18px 16px;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.device-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(14,211,154,.4);}
.device-item i{font-size:20px;color:var(--brand-deep);margin-bottom:10px;display:block;}
.device-item h4{font-size:15.5px;font-weight:700;margin-bottom:6px;}
.device-item p{font-size:14px;color:var(--muted);margin:0;line-height:1.7;}

.fact-row{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px;}
.fact{
  border:1px solid var(--line);border-radius:var(--r-md);
  padding:16px 18px;background:#fff;
}
.fact .val{font-size:26px;font-weight:800;color:#0A6A4F;font-variant-numeric:tabular-nums;line-height:1.2;}
.fact .lbl{font-size:13px;color:var(--muted);margin-top:4px;}

/* CTA band */
.cta-band{
  margin-top:34px;
  background:var(--dark);
  border-radius:var(--r-lg);
  padding:38px 40px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-90px;top:-90px;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,211,154,.28),transparent 68%);
  pointer-events:none;
}
.cta-band h3{color:#fff;font-size:clamp(19px,2.2vw,24px);margin-bottom:8px;position:relative;z-index:1;}
.cta-band p{color:var(--on-dark-muted);margin:0;font-size:15px;max-width:52ch;position:relative;z-index:1;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1;}
.btn-main{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 28px;border-radius:999px;border:none;
  background:var(--grad);color:#05130D;font-weight:700;font-size:15.5px;
  cursor:pointer;transition:transform .22s ease,filter .22s ease;
}
.btn-main:hover{filter:brightness(1.06);transform:translateY(-2px);color:#05130D;text-decoration:none;}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  padding:12px 26px;border-radius:999px;
  background:transparent;border:1.5px solid rgba(255,255,255,.55);
  color:#fff;font-weight:600;font-size:15px;cursor:pointer;
  transition:all .22s ease;
}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff;text-decoration:none;}

/* back to top */
.to-top{
  margin:8px 0 0;display:flex;justify-content:center;
}
.to-top a{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--muted);
  padding:10px 20px;border-radius:999px;border:1px solid var(--line);background:#fff;
  transition:all .22s ease;
}
.to-top a:hover{color:#0A6A4F;border-color:rgba(14,211,154,.5);text-decoration:none;transform:translateY(-2px);}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:var(--on-dark-muted);padding:66px 0 0;margin-top:80px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;margin-bottom:14px;}
.site-footer p{font-size:14px;line-height:1.8;color:var(--on-dark-muted);max-width:42ch;margin:0;}
.site-footer h4{font-size:14px;color:#fff;letter-spacing:.06em;margin-bottom:16px;font-weight:700;}
.footer-links{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--on-dark-muted);}
.footer-links a:hover{color:var(--brand);text-decoration:none;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:12px;
  justify-content:space-between;align-items:center;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- mobile tab bar ---------- */
.mobile-tabs{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:1040;
  background:#fff;border-top:1px solid var(--line);
  box-shadow:0 -6px 20px rgba(11,21,18,.08);
  padding:6px 4px calc(6px + env(safe-area-inset-bottom,0px));
}
.mobile-tabs ul{display:flex;margin:0;padding:0;list-style:none;}
.mobile-tabs li{flex:1;}
.mobile-tabs a{
  display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:6px 2px;font-size:11px;font-weight:600;color:var(--muted);
  border-radius:10px;line-height:1.2;text-align:center;
}
.mobile-tabs a i{font-size:17px;}
.mobile-tabs a:hover{text-decoration:none;color:var(--text);}
.mobile-tabs a.active{color:var(--brand-deep);font-weight:800;}
.mobile-tabs a.active i{color:var(--brand);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .layout{grid-template-columns:230px minmax(0,1fr);gap:34px;}
  .section-block{padding:30px 28px;}
}
@media (max-width:991px){
  .nav-links,.nav-cta{display:none;}
  .nav-inner{height:64px;justify-content:space-between;}
  .mobile-tabs{display:block;}
  body{padding-bottom:84px;}
  .layout{grid-template-columns:1fr;gap:22px;}
  .anchor-col{position:static;}
  .anchor-card{display:none;}
  .anchor-scroll{
    display:flex;gap:10px;overflow-x:auto;padding:4px 0 12px;
    -webkit-overflow-scrolling:touch;scrollbar-width:none;
  }
  .anchor-scroll::-webkit-scrollbar{display:none;}
  .anchor-scroll a{
    flex:0 0 auto;padding:8px 16px;border-radius:999px;
    background:#fff;border:1px solid var(--line);
    font-size:13.5px;font-weight:600;color:var(--muted);white-space:nowrap;
  }
  .anchor-scroll a.active{background:rgba(14,211,154,.13);border-color:rgba(14,211,154,.45);color:#0A6A4F;}
  .device-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .page-body{padding:44px 0 24px;}
  .cta-band{padding:30px 26px;}
}
@media (max-width:767px){
  body{font-size:15px;}
  .page-head{padding:34px 0 30px;}
  .page-head h2,.page-head h1{font-size:clamp(24px,6.4vw,32px);}
  .section-block{padding:24px 20px;border-radius:var(--r-md);scroll-margin-top:84px;}
  .device-grid,.fact-row{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .cta-actions{width:100%;flex-direction:column;}
  .btn-main,.btn-ghost{width:100%;justify-content:center;}
  .container{padding-left:16px;padding-right:16px;}
}

/* roulang page: category1 */
:root{
  --brand:#0ED39A;
  --brand-deep:#0AA87B;
  --accent:#FF6A1F;
  --page-bg:#F3F7F5;
  --card:#FFFFFF;
  --dark:#0B1512;
  --line:#E2EAE5;
  --text:#16211C;
  --muted:#5D6C65;
  --text-invert:rgba(255,255,255,.72);
  --grad:linear-gradient(135deg,#0ED39A 0%,#6FE7A8 55%,#C9F5D8 100%);
  --grad-soft:linear-gradient(180deg,#FFFFFF 0%,#F3F7F5 100%);
  --radius-xl:22px;
  --radius-md:16px;
  --radius-sm:12px;
  --radius-pill:999px;
  --shadow-1:0 6px 22px rgba(11,21,18,.07);
  --shadow-2:0 16px 36px rgba(11,21,18,.13);
  --section-y:96px;
  --gutter:24px;
  --container:1200px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--page-bg);
  padding-bottom:0;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand-deep);text-decoration:none;text-underline-offset:4px;transition:color .22s ease,background-color .22s ease,box-shadow .22s ease,transform .22s ease}
a:hover{text-decoration:underline;color:var(--brand-deep)}
h1,h2,h3,h4{margin:0 0 14px;font-weight:700;line-height:1.25;letter-spacing:-.01em}
h1{font-size:clamp(28px,4.6vw,50px);line-height:1.15}
h2{font-size:clamp(24px,3vw,34px);line-height:1.25}
h3{font-size:21px;font-weight:600;line-height:1.35}
p{margin:0 0 16px;max-width:72ch}
ul{margin:0;padding:0;list-style:none}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:3px solid rgba(14,211,154,.35);outline-offset:2px;border-radius:8px}
.container{max-width:var(--container);margin:0 auto;padding:0 20px;width:100%}
.num{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 26px rgba(11,21,18,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:72px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  width:36px;height:36px;border-radius:12px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:14px;color:#05130D;letter-spacing:.5px;flex:0 0 auto;
}
.brand-text{display:flex;align-items:baseline;gap:5px;font-size:17px;font-weight:800;color:var(--text)}
.brand-text span{font-weight:600;color:var(--muted);font-size:15px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links li a{
  position:relative;display:inline-block;padding:6px 0;font-size:15px;font-weight:600;color:var(--text);
}
.nav-links li a::after{
  content:"";position:absolute;left:0;right:0;bottom:-24px;height:3px;border-radius:3px;
  background:var(--brand);transform:scaleX(0);transform-origin:center;transition:transform .24s ease;
}
.nav-links li a:hover{color:var(--brand-deep);text-decoration:none}
.nav-links li a:hover::after,
.nav-links li a.active::after{transform:scaleX(1)}
.nav-links li a.active{color:var(--text)}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:var(--radius-pill);
  background:var(--grad);color:#05130D;font-size:14.5px;font-weight:700;
  box-shadow:0 6px 18px rgba(14,211,154,.28);white-space:nowrap;
}
.nav-cta:hover{text-decoration:none;color:#05130D;transform:translateY(-2px);box-shadow:0 12px 26px rgba(14,211,154,.34)}

/* ---------- buttons ---------- */
.btn-main,.btn-ghost,.btn-line{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:700;cursor:pointer;border:0}
.btn-main{
  padding:14px 28px;border-radius:var(--radius-pill);background:var(--grad);color:#05130D;
  box-shadow:0 10px 26px rgba(14,211,154,.26);
}
.btn-main:hover{color:#05130D;text-decoration:none;transform:translateY(-3px);box-shadow:0 16px 32px rgba(14,211,154,.34)}
.btn-line{
  padding:13px 26px;border-radius:14px;background:transparent;color:var(--brand-deep);
  border:1.5px solid var(--brand);
}
.btn-line:hover{background:rgba(14,211,154,.08);color:var(--brand-deep);text-decoration:none;transform:translateY(-2px)}
.btn-ghost{
  padding:13px 26px;border-radius:var(--radius-pill);background:transparent;color:#fff;
  border:1.5px solid rgba(255,255,255,.5);
}
.btn-ghost:hover{background:rgba(255,255,255,.1);color:#fff;text-decoration:none}

/* ---------- hero (category1 窄幅浅色) ---------- */
.hero-guide{
  position:relative;overflow:hidden;
  background:var(--grad-soft);
  border-bottom:1px solid var(--line);
  padding:52px 0 78px;
}
.hero-guide::before{
  content:"";position:absolute;width:620px;height:620px;right:-200px;top:-240px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,211,154,.28) 0%,rgba(14,211,154,0) 68%);
  pointer-events:none;
}
.hero-shell{position:relative;z-index:2;max-width:1080px;margin:0 auto}
.crumb{font-size:13px;color:var(--muted);margin-bottom:22px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--brand-deep)}
.crumb .sep{color:#C6D3CD}
.crumb .now{color:var(--brand-deep);font-weight:600}
.hero-cols{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}
.tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 15px;border-radius:var(--radius-pill);
  background:#fff;border:1px solid var(--line);
  font-size:13.5px;font-weight:600;color:var(--muted);
}
.tag i{color:var(--brand-deep);font-size:12px}
.tag.hot{color:#B8460F;border-color:rgba(255,106,31,.35);background:rgba(255,106,31,.07)}
.tag.hot i{color:var(--accent)}
.hero-guide h1{margin-bottom:16px}
.hero-guide h1 em{font-style:normal;color:var(--brand-deep)}
.hero-sub{font-size:17px;color:var(--muted);max-width:58ch;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-xl);
  border:1px solid var(--line);box-shadow:var(--shadow-1);
}
.hero-float{
  position:absolute;left:-22px;bottom:-26px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-md);padding:16px 18px;box-shadow:var(--shadow-2);min-width:210px;
}
.hero-float .fl-label{font-size:12.5px;color:var(--muted);letter-spacing:.04em;margin-bottom:8px}
.hero-float .fl-list{display:flex;flex-direction:column;gap:8px}
.hero-float .fl-item{display:flex;align-items:center;gap:9px;font-size:13.5px;font-weight:600}
.hero-float .fl-item b{
  font-variant-numeric:tabular-nums;color:var(--brand-deep);font-size:13px;font-weight:800;
  width:26px;height:26px;border-radius:9px;background:rgba(14,211,154,.12);
  display:flex;align-items:center;justify-content:center;
}

/* ---------- section base ---------- */
.section{padding:var(--section-y) 0}
.section-tight{padding:64px 0}
.sec-head{max-width:720px;margin-bottom:44px}
.sec-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--brand-deep);text-transform:uppercase;margin-bottom:12px;
}
.sec-kicker::before{content:"";width:22px;height:3px;border-radius:3px;background:var(--brand)}
.sec-head p{color:var(--muted);margin-bottom:0}

/* ---------- 步骤（纵向编号）---------- */
.steps-wrap{display:flex;flex-direction:column;gap:20px}
.step-card{
  display:grid;grid-template-columns:112px 1fr 64px;gap:24px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-xl);
  padding:28px 32px;box-shadow:var(--shadow-1);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(14,211,154,.4)}
.step-no{
  font-size:46px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums;
  background:linear-gradient(135deg,#0ED39A 0%,#7FE9B6 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.step-no span{display:block;font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--muted);-webkit-text-fill-color:var(--muted);margin-top:6px}
.step-body h3{margin-bottom:8px}
.step-body p{margin:0;color:var(--muted);font-size:15.5px;max-width:66ch}
.step-icon{
  width:56px;height:56px;border-radius:18px;background:rgba(14,211,154,.1);
  display:flex;align-items:center;justify-content:center;color:var(--brand-deep);font-size:21px;
  justify-self:end;
}

/* ---------- 核对清单 ---------- */
.band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.check-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}
.check-list{display:flex;flex-direction:column;gap:0}
.check-item{
  display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line);
}
.check-item:first-child{padding-top:0}
.check-item:last-child{border-bottom:0;padding-bottom:0}
.check-dot{
  flex:0 0 auto;width:30px;height:30px;border-radius:10px;background:rgba(14,211,154,.12);
  color:var(--brand-deep);display:flex;align-items:center;justify-content:center;font-size:13px;margin-top:3px;
}
.check-item h3{font-size:17.5px;margin-bottom:5px}
.check-item p{margin:0;color:var(--muted);font-size:15px;max-width:60ch}

/* ---------- 提示框 ---------- */
.note-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.note{
  border-radius:var(--radius-xl);padding:28px 30px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-1);
}
.note.info{border-left:4px solid var(--brand)}
.note.warn{border-left:4px solid var(--accent)}
.note h3{display:flex;align-items:center;gap:10px;font-size:18.5px;margin-bottom:12px}
.note.info h3 i{color:var(--brand-deep)}
.note.warn h3 i{color:var(--accent)}
.note p{margin:0 0 12px;color:var(--muted);font-size:15.4px}
.note p:last-child{margin-bottom:0}

/* ---------- 场景卡带 ---------- */
.rail{display:flex;gap:20px;overflow-x:auto;padding:6px 4px 22px;scroll-snap-type:x mandatory}
.rail::-webkit-scrollbar{height:8px}
.rail::-webkit-scrollbar-thumb{background:#CFDDD6;border-radius:8px}
.rail-card{
  flex:0 0 320px;scroll-snap-align:start;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-xl);padding:26px 24px;box-shadow:var(--shadow-1);
  display:flex;flex-direction:column;gap:10px;
  transition:transform .28s ease,box-shadow .28s ease;
}
.rail-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
.rail-badge{
  align-self:flex-start;font-size:12.5px;font-weight:700;padding:5px 12px;border-radius:var(--radius-pill);
  background:rgba(14,211,154,.12);color:var(--brand-deep);
}
.rail-card h3{font-size:18px;margin:2px 0 0}
.rail-card p{margin:0;font-size:14.6px;color:var(--muted)}
.rail-card .rail-link{margin-top:auto;font-size:14px;font-weight:700;color:var(--brand-deep);display:inline-flex;align-items:center;gap:7px}

/* ---------- FAQ ---------- */
.faq-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-xl);overflow:hidden;box-shadow:var(--shadow-1)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:transparent;border:0;text-align:left;padding:22px 26px;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--text);transition:color .22s ease,background-color .22s ease;
}
.faq-q:hover{background:rgba(14,211,154,.05)}
.faq-item.open .faq-q{color:var(--brand-deep);box-shadow:inset 4px 0 0 var(--brand)}
.faq-ico{
  flex:0 0 auto;width:30px;height:30px;border-radius:50%;border:1.5px solid var(--line);
  display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;
  transition:transform .22s ease,color .22s ease,border-color .22s ease;
}
.faq-item.open .faq-ico{color:var(--brand-deep);border-color:rgba(14,211,154,.5);transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-a p{padding:0 26px 22px;margin:0;color:var(--muted);font-size:15.4px}

/* ---------- CTA 条带 ---------- */
.cta-band{
  background:var(--dark);border-radius:var(--radius-xl);padding:44px 46px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;width:420px;height:420px;right:-140px;top:-180px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,211,154,.22) 0%,rgba(14,211,154,0) 70%);
}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{color:#fff;margin-bottom:10px;font-size:clamp(22px,2.4vw,30px)}
.cta-band p{color:var(--text-invert);margin:0;max-width:52ch;font-size:15.4px}
.cta-band .cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:var(--text-invert);padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.site-footer h4{color:#fff;font-size:15.5px;margin-bottom:16px;font-weight:700}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-brand .brand-mark{background:var(--grad);color:#05130D}
.site-footer p{color:var(--text-invert);font-size:14.6px;max-width:42ch}
.footer-links li{margin-bottom:10px}
.footer-links a{color:var(--text-invert);font-size:14.6px}
.footer-links a:hover{color:var(--brand);text-decoration:none}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.4px;color:rgba(255,255,255,.55);
}

/* ---------- mobile bottom tab ---------- */
.tab-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:1040;
  background:#fff;border-top:1px solid var(--line);
  padding:6px 6px calc(6px + env(safe-area-inset-bottom));
  box-shadow:0 -6px 22px rgba(11,21,18,.08);
}
.tab-bar ul{display:flex;align-items:stretch;justify-content:space-around}
.tab-bar li{flex:1 1 0;min-width:0}
.tab-bar a{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  padding:6px 2px;font-size:11.5px;color:var(--muted);font-weight:600;text-align:center;
}
.tab-bar a svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.75;fill:none;stroke-linecap:round;stroke-linejoin:round}
.tab-bar a:hover{text-decoration:none;color:var(--brand-deep)}
.tab-bar a.active{color:var(--brand-deep);font-weight:800}
.tab-bar a.active svg{stroke:var(--brand-deep)}
.tab-bar a span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  :root{--section-y:84px}
  .hero-cols{gap:34px}
  .step-card{grid-template-columns:92px 1fr 56px;gap:20px}
  .step-no{font-size:40px}
  .rail-card{flex-basis:300px}
}
@media (max-width:991px){
  :root{--section-y:72px;--gutter:20px}
  body{padding-bottom:84px;font-size:16px}
  .nav-links{display:none}
  .nav-cta{display:none}
  .tab-bar{display:block}
  .hero-cols{grid-template-columns:1fr}
  .hero-visual{order:-1}
  .hero-float{position:static;left:auto;bottom:auto;margin-top:-38px;margin-left:14px}
  .check-grid{grid-template-columns:1fr;gap:32px}
  .note-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767px){
  :root{--section-y:64px;--gutter:16px}
  h1{font-size:clamp(26px,7vw,34px)}
  h2{font-size:clamp(22px,5.6vw,28px)}
  .container{padding:0 16px}
  .nav-inner{height:64px}
  .brand-text{font-size:16px}
  .hero-guide{padding:34px 0 56px}
  .hero-actions .btn-main,.hero-actions .btn-line{width:100%}
  .step-card{grid-template-columns:1fr;gap:14px;padding:22px 20px;text-align:left}
  .step-icon{justify-self:start;width:46px;height:46px;border-radius:14px;font-size:18px;order:-1}
  .step-no{font-size:34px;display:flex;align-items:baseline;gap:10px}
  .step-no span{margin-top:0}
  .rail-card{flex-basis:262px}
  .cta-band{padding:30px 22px}
  .cta-band .cta-actions{width:100%}
  .cta-band .cta-actions .btn-main,.cta-band .cta-actions .btn-ghost{width:100%}
  .faq-q{padding:18px 18px;font-size:16px}
  .faq-a p{padding:0 18px 18px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{justify-content:flex-start}
}
@media (max-width:520px){
  .tag{font-size:12.8px;padding:6px 12px}
  .hero-sub{font-size:15.6px}
  .tab-bar a{font-size:11px}
}

/* roulang page: category3 */
:root{
  --brand:#0ED39A;
  --brand-deep:#0BB585;
  --brand-soft:rgba(14,211,154,.10);
  --accent:#FF6A1F;
  --bg:#F3F7F5;
  --card:#FFFFFF;
  --dark:#0B1512;
  --border:#E2EAE5;
  --text:#16211C;
  --muted:#5D6C65;
  --inv-muted:rgba(255,255,255,.72);
  --grad:linear-gradient(135deg,#0ED39A 0%,#6FE7A8 55%,#C9F5D8 100%);
  --r-xl:22px;
  --r-lg:18px;
  --r-md:16px;
  --r-sm:12px;
  --r-pill:999px;
  --sh:0 6px 22px rgba(11,21,18,.07);
  --sh-hover:0 16px 36px rgba(11,21,18,.13);
  --sec-pad:96px;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  padding-bottom:0;
}
img{max-width:100%;display:block;}
a{color:var(--brand-deep);text-decoration:none;text-underline-offset:3px;transition:color .2s ease;}
a:hover{color:var(--brand);text-decoration:underline;}
button{font-family:inherit;}
ul{list-style:none;padding:0;margin:0;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:-.01em;}
h1{font-size:clamp(28px,4.6vw,50px);line-height:1.15;}
h2{font-size:clamp(24px,3vw,34px);}
h3{font-size:20px;font-weight:600;}
p{margin:0 0 16px;}
.container{max-width:1200px;padding:0 22px;margin:0 auto;width:100%;}
.sec{padding:var(--sec-pad) 0;}
.sec-tight{padding:64px 0;}
.sec-head{max-width:760px;margin-bottom:44px;}
.sec-head .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.14em;
  color:var(--brand-deep);text-transform:uppercase;margin-bottom:14px;
}
.sec-head .eyebrow::before{content:"";width:26px;height:3px;border-radius:3px;background:var(--grad);}
.sec-head p{color:var(--muted);max-width:66ch;margin:14px 0 0;font-size:16px;}
.lead{font-size:17px;color:var(--muted);max-width:64ch;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(11,21,18,.08);}
.nav-inner{display:flex;align-items:center;gap:28px;height:72px;}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);font-weight:800;flex:0 0 auto;}
.brand:hover{text-decoration:none;color:var(--text);}
.brand-mark{
  width:40px;height:40px;border-radius:13px;
  display:grid;place-items:center;
  background:var(--grad);
  color:#05130D;font-weight:800;font-size:15px;letter-spacing:.02em;
  box-shadow:0 6px 16px rgba(14,211,154,.32);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;font-size:16px;}
.brand-text b{font-weight:800;}
.brand-text span{font-size:12px;color:var(--muted);font-weight:600;letter-spacing:.06em;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-links a{
  position:relative;display:block;padding:10px 14px;
  color:var(--text);font-size:15px;font-weight:600;border-radius:10px;
  transition:color .2s ease,background .2s ease;
}
.nav-links a:hover{color:var(--brand-deep);background:var(--brand-soft);text-decoration:none;}
.nav-links a.active{color:var(--brand-deep);}
.nav-links a.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;
  border-radius:3px;background:var(--brand);
}
.nav-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-pill);
  background:var(--grad);color:#05130D;font-weight:700;font-size:14.5px;
  box-shadow:0 8px 20px rgba(14,211,154,.28);
  transition:transform .2s ease,filter .2s ease;
  flex:0 0 auto;
}
.nav-cta:hover{transform:translateY(-2px);filter:brightness(1.06);color:#05130D;text-decoration:none;}

/* ============ 面包屑 ============ */
.crumb{font-size:13px;color:var(--muted);padding:22px 0 0;}
.crumb span.sep{margin:0 8px;color:#B8C4BE;}
.crumb .current{color:var(--brand-deep);font-weight:600;}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand-deep);}

/* ============ 分类页头（窄幅浅色 Hero 变体） ============ */
.cat-hero{
  position:relative;
  padding:52px 0 8px;
  overflow:hidden;
}
.cat-hero::before{
  content:"";position:absolute;right:-160px;top:-180px;width:520px;height:520px;
  border-radius:50%;
  background:radial-gradient(circle at 40% 40%,rgba(14,211,154,.26),rgba(14,211,154,0) 68%);
  pointer-events:none;
}
.cat-hero-inner{
  position:relative;
  display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,1fr);
  gap:44px;align-items:center;
}
.cat-badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:var(--r-pill);
  background:#fff;border:1px solid var(--border);
  font-size:13px;font-weight:600;color:var(--muted);
}
.pill .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);}
.pill.accent .dot{background:var(--accent);}
.cat-hero h1{max-width:20ch;}
.cat-hero .sub{margin-top:18px;font-size:17px;color:var(--muted);max-width:52ch;}
.cat-hero-visual{
  border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--border);
  box-shadow:var(--sh);aspect-ratio:16/10;background:#fff;
}
.cat-hero-visual img{width:100%;height:100%;object-fit:cover;transition:transform 2.4s ease;}
.cat-hero-visual:hover img{transform:scale(1.03);}

/* 筛选胶囊行 */
.filter-row{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:36px;padding-top:26px;border-top:1px solid var(--border);
}
.filter-chip{
  padding:9px 18px;border-radius:var(--r-pill);
  border:1px solid var(--border);background:#fff;
  font-size:14px;font-weight:600;color:var(--muted);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.filter-chip.is-on{
  background:var(--brand-soft);border-color:rgba(14,211,154,.5);color:var(--brand-deep);
}
.filter-chip:hover{border-color:rgba(14,211,154,.55);color:var(--brand-deep);}

/* ============ 卡片矩阵 3 列 ============ */
.grid-3{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:26px;
}
.device-card{
  display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-xl);overflow:hidden;
  box-shadow:var(--sh);
  transition:transform .3s ease,box-shadow .3s ease;
}
.device-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.device-card .thumb{aspect-ratio:4/3;overflow:hidden;border-bottom:1px solid var(--border);}
.device-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 2.4s ease;}
.device-card:hover .thumb img{transform:scale(1.03);}
.device-card .body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.device-card h3{font-size:19px;}
.device-card p{font-size:14.5px;color:var(--muted);margin:0;line-height:1.75;}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:14px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;font-weight:700;padding:5px 12px;border-radius:var(--r-pill);
  background:var(--brand-soft);color:var(--brand-deep);
}
.tag.orange{background:rgba(255,106,31,.12);color:#C44C0C;}

/* ============ 深色信息卡区 ============ */
.dark-band{
  background:var(--dark);color:#fff;
  border-radius:28px;padding:52px 48px;
  position:relative;overflow:hidden;
}
.dark-band::after{
  content:"";position:absolute;left:-120px;bottom:-160px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(14,211,154,.22),rgba(14,211,154,0) 70%);
  pointer-events:none;
}
.dark-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);}
.dark-band > p{color:var(--inv-muted);max-width:58ch;margin-top:14px;}
.dark-grid{
  position:relative;
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);
  gap:44px;align-items:center;margin-top:8px;
}
.dark-points{display:grid;gap:14px;margin-top:26px;}
.dark-point{
  display:flex;gap:14px;align-items:flex-start;
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-md);padding:18px 20px;
  background:rgba(255,255,255,.03);
}
.dark-point i{color:var(--brand);font-size:18px;margin-top:4px;}
.dark-point strong{display:block;font-size:15.5px;font-weight:700;}
.dark-point span{display:block;font-size:14px;color:var(--inv-muted);line-height:1.7;}
.stat-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.stat-pill{
  display:inline-flex;align-items:center;gap:9px;
  border:1px solid rgba(255,255,255,.16);
  border-radius:var(--r-pill);padding:8px 16px;
  font-size:13.5px;color:var(--inv-muted);
}
.stat-pill b{
  color:#fff;font-weight:800;font-size:16px;
  font-variant-numeric:tabular-nums;
}
.stat-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);}
.stat-pill .dot.o{background:var(--accent);}
.dark-visual{
  border-radius:var(--r-xl);overflow:hidden;border:1px solid rgba(255,255,255,.14);
  aspect-ratio:4/3;
}
.dark-visual img{width:100%;height:100%;object-fit:cover;}

/* ============ 适配清单（不对称两栏） ============ */
.split{
  display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  gap:46px;align-items:start;
}
.check-list{display:grid;gap:14px;margin-top:26px;}
.check-item{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-md);padding:20px 22px;
  box-shadow:var(--sh);
  transition:transform .28s ease,box-shadow .28s ease;
}
.check-item:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.check-item .num{
  font-size:14px;font-weight:800;color:var(--brand-deep);
  background:var(--brand-soft);border-radius:10px;
  padding:6px 11px;font-variant-numeric:tabular-nums;line-height:1.4;
}
.check-item h3{font-size:16.5px;margin-bottom:4px;}
.check-item p{margin:0;font-size:14.5px;color:var(--muted);}
.side-card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-xl);padding:28px 26px;box-shadow:var(--sh);
}
.side-card h3{font-size:18px;margin-bottom:14px;}
.side-card ul li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14.5px;color:var(--muted);padding:9px 0;
  border-bottom:1px dashed var(--border);
}
.side-card ul li:last-child{border-bottom:0;}
.side-card ul li i{color:var(--brand);margin-top:5px;font-size:13px;}
.side-note{
  margin-top:20px;padding:16px 18px;border-radius:var(--r-md);
  background:var(--brand-soft);border:1px solid rgba(14,211,154,.28);
  font-size:14px;color:var(--brand-deep);font-weight:600;
}

/* ============ CTA 条带 ============ */
.cta-band{
  background:var(--dark);border-radius:28px;
  padding:44px 46px;
  display:flex;align-items:center;justify-content:space-between;
  gap:30px;flex-wrap:wrap;color:#fff;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;right:-100px;top:-140px;width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(14,211,154,.24),rgba(14,211,154,0) 70%);
}
.cta-band h2{font-size:clamp(20px,2.4vw,28px);color:#fff;position:relative;}
.cta-band p{color:var(--inv-muted);margin:10px 0 0;font-size:15px;position:relative;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;}
.btn-main,.btn-ghost,.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 28px;border-radius:var(--r-pill);
  font-weight:700;font-size:15px;cursor:pointer;
  transition:transform .2s ease,filter .2s ease,background .2s ease,color .2s ease;
  border:0;
}
.btn-main{background:var(--grad);color:#05130D;box-shadow:0 10px 24px rgba(14,211,154,.3);}
.btn-main:hover{filter:brightness(1.06);transform:translateY(-2px);color:#05130D;text-decoration:none;}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.35);}
.btn-ghost:hover{background:rgba(255,255,255,.09);color:#fff;transform:translateY(-2px);text-decoration:none;}
.btn-line{background:transparent;color:var(--brand-deep);border:1.5px solid var(--brand);}
.btn-line:hover{background:var(--brand-soft);color:var(--brand-deep);transform:translateY(-2px);text-decoration:none;}
a:focus-visible,button:focus-visible,.filter-chip:focus-visible{
  outline:3px solid rgba(14,211,154,.35);outline-offset:2px;
}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;}
.faq-item{border-bottom:1px solid var(--border);}
.faq-q{
  width:100%;background:transparent;border:0;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 16px 20px 18px;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--text);cursor:pointer;
  position:relative;transition:color .2s ease,background .2s ease;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:4px;
  border-radius:4px;background:transparent;transition:background .2s ease;
}
.faq-item.open .faq-q::before{background:var(--brand);}
.faq-item.open .faq-q{color:var(--brand-deep);}
.faq-q:hover{color:var(--brand-deep);}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  border:1.5px solid var(--border);display:grid;place-items:center;
  font-size:15px;font-weight:700;color:var(--muted);line-height:1;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .25s ease;
}
.faq-item.open .faq-icon{background:var(--brand);border-color:var(--brand);color:#05130D;transform:rotate(180deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .25s ease;
}
.faq-a p{padding:0 18px 20px 18px;margin:0;color:var(--muted);font-size:15px;max-width:72ch;}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:#fff;margin-top:96px;padding:66px 0 26px;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px;
}
.footer-brand{display:flex;align-items:center;gap:12px;font-size:17px;font-weight:800;margin-bottom:16px;color:#fff;}
.site-footer p{color:var(--inv-muted);font-size:14.5px;max-width:38ch;}
.site-footer h4{font-size:15px;margin-bottom:18px;color:#fff;}
.footer-links li{margin-bottom:11px;}
.footer-links a{color:var(--inv-muted);font-size:14.5px;}
.footer-links a:hover{color:var(--brand);text-decoration:none;}
.footer-bottom{
  margin-top:46px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ============ 移动端底部 Tab ============ */
.tabbar{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:1040;
  background:rgba(255,255,255,.98);
  border-top:1px solid var(--border);
  box-shadow:0 -6px 20px rgba(11,21,18,.08);
  padding-bottom:env(safe-area-inset-bottom);
}
.tabbar ul{display:flex;height:60px;}
.tabbar li{flex:1;}
.tabbar a{
  height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:11.5px;font-weight:600;color:var(--muted);
}
.tabbar a i{font-size:17px;}
.tabbar a:hover{text-decoration:none;color:var(--brand-deep);}
.tabbar a.active{color:var(--brand-deep);font-weight:800;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .grid-3{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
  .dark-band{padding:44px 36px;}
}
@media (max-width:991px){
  :root{--sec-pad:72px;}
  body{padding-bottom:84px;}
  .nav-links,.nav-cta{display:none;}
  .nav-inner{height:64px;justify-content:space-between;}
  .tabbar{display:block;}
  .cat-hero-inner{grid-template-columns:1fr;gap:30px;}
  .cat-hero-visual{aspect-ratio:16/9;}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .dark-grid{grid-template-columns:1fr;gap:30px;}
  .split{grid-template-columns:1fr;gap:30px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:767px){
  body{font-size:15.5px;}
  .container{padding:0 16px;}
  :root{--sec-pad:58px;}
  .grid-3{grid-template-columns:1fr;gap:18px;}
  .cat-hero{padding:34px 0 4px;}
  .cat-hero h1{max-width:none;}
  .device-card .body{padding:18px;}
  .dark-band{padding:32px 22px;border-radius:22px;}
  .cta-band{padding:30px 22px;border-radius:22px;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .btn-main,.btn-ghost,.btn-line{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .faq-q{font-size:15.5px;padding:18px 10px 18px 16px;}
  .filter-row{gap:8px;}
  .filter-chip{padding:8px 14px;font-size:13px;}
}

/* roulang page: category4 */
:root{
  --brand:#0ED39A;
  --brand-deep:#08A87A;
  --accent:#FF6A1F;
  --bg:#F3F7F5;
  --surface:#FFFFFF;
  --dark:#0B1512;
  --border:#E2EAE5;
  --text:#16211C;
  --muted:#5D6C65;
  --inv-muted:rgba(255,255,255,.72);
  --grad:linear-gradient(135deg,#0ED39A 0%,#6FE7A8 55%,#C9F5D8 100%);
  --r-lg:22px;
  --r-md:16px;
  --r-sm:12px;
  --r-img:18px;
  --sh-rest:0 6px 22px rgba(11,21,18,.07);
  --sh-hover:0 16px 36px rgba(11,21,18,.13);
  --sec-y:96px;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16.5px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  padding-bottom:0;
}
img{max-width:100%;display:block;}
a{color:var(--brand-deep);text-decoration:none;text-underline-offset:3px;transition:color .2s ease,background-color .2s ease;}
a:hover{color:var(--brand);text-decoration:underline;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700;letter-spacing:.2px;}
p{margin:0 0 14px;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(14,211,154,.35);outline-offset:2px;border-radius:6px;}
.container{max-width:1200px;padding-left:22px;padding-right:22px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(11,21,18,.08);}
.nav-inner{display:flex;align-items:center;gap:24px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--grad);color:#05130D;font-weight:800;font-size:15px;letter-spacing:.5px;
}
.brand-text{display:flex;align-items:baseline;gap:2px;font-size:17px;color:var(--text);}
.brand-text b{font-weight:800;}
.brand-text span{font-weight:600;color:var(--muted);font-size:15px;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-links a{
  display:block;position:relative;padding:10px 12px;border-radius:10px;
  font-size:15px;font-weight:600;color:var(--muted);text-decoration:none;
}
.nav-links a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:3px;border-radius:3px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;
}
.nav-links a:hover{color:var(--text);background:rgba(14,211,154,.07);}
.nav-links a.active{color:var(--text);}
.nav-links a.active::after{transform:scaleX(1);}
.nav-cta{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  padding:10px 20px;border-radius:999px;
  background:var(--grad);color:#05130D;font-weight:700;font-size:15px;text-decoration:none;
  box-shadow:0 6px 18px rgba(14,211,154,.28);
  transition:transform .2s ease,filter .2s ease,box-shadow .2s ease;
}
.nav-cta:hover{filter:brightness(1.06);transform:translateY(-2px);color:#05130D;text-decoration:none;box-shadow:0 12px 26px rgba(14,211,154,.32);}

/* ---------- shared bits ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:1.4px;color:var(--brand-deep);
  text-transform:uppercase;
}
.eyebrow::before{content:"";width:22px;height:3px;border-radius:3px;background:var(--grad);}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;border:1px solid var(--border);
  background:#fff;font-size:13.5px;font-weight:600;color:var(--muted);
}
.pill .dot{width:8px;height:8px;border-radius:50%;background:var(--brand);}
.pill.accent .dot{background:var(--accent);}
.btn-main{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 28px;border-radius:999px;border:0;
  background:var(--grad);color:#05130D;font-weight:700;font-size:16px;
  box-shadow:0 10px 26px rgba(14,211,154,.28);cursor:pointer;text-decoration:none;
  transition:transform .2s ease,filter .2s ease;
}
.btn-main:hover{filter:brightness(1.06);transform:translateY(-3px);color:#05130D;text-decoration:none;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:999px;border:1.5px solid var(--brand);
  background:transparent;color:var(--brand-deep);font-weight:700;font-size:16px;
  cursor:pointer;text-decoration:none;transition:background-color .2s ease,transform .2s ease,color .2s ease;
}
.btn-ghost:hover{background:rgba(14,211,154,.08);transform:translateY(-2px);color:var(--brand-deep);text-decoration:none;}
.section{padding:var(--sec-y) 0;}
.section-head{max-width:760px;margin-bottom:42px;}
.section-head h2{font-size:clamp(24px,3vw,34px);margin:14px 0 12px;}
.section-head p{color:var(--muted);font-size:16px;max-width:62ch;}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:#fff;
  border-bottom:1px solid var(--border);
  padding:76px 0 64px;
}
.page-hero::after{
  content:"";position:absolute;right:-160px;top:-140px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,211,154,.26) 0%,rgba(14,211,154,0) 68%);
  pointer-events:none;
}
.page-hero .hero-wrap{position:relative;z-index:1;max-width:820px;}
.page-hero h1{
  font-size:clamp(28px,4.6vw,50px);line-height:1.15;margin:18px 0 16px;font-weight:700;
}
.page-hero h1 em{font-style:normal;color:var(--brand-deep);}
.page-hero .lede{font-size:17.5px;color:var(--muted);max-width:64ch;margin-bottom:26px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}

/* ---------- faq ---------- */
.faq-layout{max-width:900px;margin:0 auto;}
.faq-group{margin-bottom:52px;}
.faq-group:last-child{margin-bottom:0;}
.faq-group-head{
  display:flex;align-items:center;gap:14px;margin-bottom:16px;
}
.faq-group-num{
  font-variant-numeric:tabular-nums;font-weight:800;font-size:14px;letter-spacing:1px;
  color:#05130D;background:var(--grad);border-radius:999px;padding:4px 12px;
}
.faq-group-head h3{font-size:20px;font-weight:700;}
.faq-group-head .count{margin-left:auto;font-size:13px;color:var(--muted);}
.faq-list{padding-left:16px;border-top:1px solid var(--border);}
.faq-item{position:relative;border-bottom:1px solid var(--border);}
.faq-item::before{
  content:"";position:absolute;left:-16px;top:18px;width:4px;height:20px;border-radius:3px;
  background:var(--brand);opacity:0;transition:opacity .22s ease;
}
.faq-item.is-open::before{opacity:1;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:16px 2px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.6;
  transition:color .22s ease;
}
.faq-q:hover{color:var(--brand-deep);}
.faq-item.is-open .faq-q{color:var(--brand-deep);}
.faq-ico{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1.5px solid var(--border);position:relative;
  transition:background-color .22s ease,border-color .22s ease,transform .22s ease;
}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--muted);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-ico::before{width:11px;height:1.75px;}
.faq-ico::after{width:1.75px;height:11px;transition:opacity .22s ease;}
.faq-item.is-open .faq-ico{background:rgba(14,211,154,.12);border-color:var(--brand);transform:rotate(180deg);}
.faq-item.is-open .faq-ico::before{background:var(--brand-deep);}
.faq-item.is-open .faq-ico::after{opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;}
.faq-a-inner{padding:0 44px 18px 2px;color:var(--muted);font-size:15.5px;line-height:1.85;}
.faq-a-inner strong{color:var(--text);font-weight:600;}
.faq-a-inner ul{margin:10px 0 0;padding-left:0;}
.faq-a-inner li{position:relative;padding-left:18px;margin-bottom:6px;}
.faq-a-inner li::before{
  content:"";position:absolute;left:2px;top:12px;width:7px;height:7px;border-radius:50%;
  background:var(--brand);
}

/* ---------- quick cards ---------- */
.quick-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.quick-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);
  overflow:hidden;display:flex;flex-direction:column;
  box-shadow:var(--sh-rest);transition:transform .3s ease,box-shadow .3s ease;
}
.quick-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.quick-card figure{margin:0;overflow:hidden;aspect-ratio:4/3;}
.quick-card img{width:100%;height:100%;object-fit:cover;transition:transform 2.4s ease;}
.quick-card:hover img{transform:scale(1.03);}
.quick-card .body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.quick-card h3{font-size:18px;font-weight:600;}
.quick-card p{color:var(--muted);font-size:14.5px;line-height:1.75;margin:0;}
.quick-card .tag{
  align-self:flex-start;padding:5px 12px;border-radius:999px;
  background:rgba(14,211,154,.1);color:var(--brand-deep);font-size:12.5px;font-weight:700;
}
.quick-card .tag.alt{background:rgba(255,106,31,.1);color:#C24A0C;}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--dark);border-radius:26px;padding:48px;color:#fff;
  display:flex;align-items:center;gap:36px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-120px;bottom:-180px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,211,154,.28) 0%,rgba(14,211,154,0) 70%);
}
.cta-band .txt{position:relative;z-index:1;flex:1 1 340px;}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px;}
.cta-band p{color:var(--inv-muted);margin:0;max-width:56ch;}
.cta-band .acts{position:relative;z-index:1;display:flex;gap:14px;flex-wrap:wrap;}
.btn-invert{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:14px 28px;border-radius:999px;background:var(--grad);color:#05130D;
  font-weight:700;text-decoration:none;transition:transform .2s ease,filter .2s ease;
}
.btn-invert:hover{transform:translateY(-3px);filter:brightness(1.06);color:#05130D;text-decoration:none;}
.btn-outline-inv{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:999px;border:1.5px solid rgba(255,255,255,.35);
  background:transparent;color:#fff;font-weight:700;text-decoration:none;
  transition:background-color .2s ease,transform .2s ease;
}
.btn-outline-inv:hover{background:rgba(255,255,255,.1);transform:translateY(-2px);color:#fff;text-decoration:none;}

/* ---------- contact ---------- */
.contact-section{background:#fff;border-top:1px solid var(--border);}
.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:start;}
.form-card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--r-lg);padding:30px;
}
.field{margin-bottom:18px;}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;}
.field .req{color:var(--accent);margin-left:3px;}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border-radius:var(--r-sm);
  border:1px solid var(--border);background:#fff;color:var(--text);
  font-size:15px;font-family:inherit;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{min-height:120px;resize:vertical;}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(14,211,154,.14);
}
.field .hint{font-size:13px;color:var(--muted);margin-top:6px;}
.form-card .btn-main{width:100%;}
.info-card{
  background:var(--dark);color:#fff;border-radius:var(--r-lg);padding:30px;
  border:1px solid rgba(255,255,255,.12);
}
.info-card h3{font-size:19px;margin-bottom:14px;}
.info-card p{color:var(--inv-muted);font-size:15px;}
.info-list{margin-top:20px;display:flex;flex-direction:column;gap:12px;}
.info-list li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--inv-muted);}
.info-list li .dot{flex:0 0 auto;width:8px;height:8px;border-radius:50%;background:var(--brand);margin-top:9px;}
.info-list li strong{color:#fff;font-weight:600;}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#fff;padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:44px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;margin-bottom:14px;}
.site-footer p{color:var(--inv-muted);font-size:14.5px;max-width:38ch;line-height:1.8;}
.site-footer h4{font-size:15px;margin-bottom:16px;color:#fff;font-weight:700;}
.footer-links li{margin-bottom:10px;}
.footer-links a{color:var(--inv-muted);font-size:14.5px;text-decoration:none;}
.footer-links a:hover{color:var(--brand);text-decoration:none;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 26px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- mobile tab ---------- */
.mobile-tab{display:none;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  :root{--sec-y:84px;}
  .quick-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:991px){
  :root{--sec-y:64px;}
  body{padding-bottom:calc(72px + env(safe-area-inset-bottom));}
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-inner{height:64px;justify-content:space-between;}
  .page-hero{padding:52px 0 44px;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px;}
  .cta-band{padding:34px 26px;}
  .mobile-tab{
    display:block;position:fixed;left:0;right:0;bottom:0;z-index:1040;
    background:#fff;border-top:1px solid var(--border);
    box-shadow:0 -6px 20px rgba(11,21,18,.08);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .mobile-tab ul{display:flex;align-items:stretch;}
  .mobile-tab li{flex:1 1 0;min-width:0;}
  .mobile-tab a{
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    height:64px;font-size:11.5px;font-weight:600;color:var(--muted);text-decoration:none;
    white-space:nowrap;overflow:hidden;
  }
  .mobile-tab a:hover{text-decoration:none;}
  .mobile-tab svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.75;fill:none;stroke-linecap:round;stroke-linejoin:round;}
  .mobile-tab a.active{color:var(--brand-deep);font-weight:800;}
  .mobile-tab a.active svg{stroke:var(--brand);}
}
@media (max-width:767px){
  body{font-size:15.5px;}
  .container{padding-left:16px;padding-right:16px;}
  .quick-grid{grid-template-columns:1fr;gap:16px;}
  .page-hero h1{font-size:clamp(26px,7.4vw,34px);}
  .page-hero .lede{font-size:16px;}
  .faq-q{font-size:15.5px;padding:15px 2px;}
  .faq-a-inner{padding-right:8px;}
  .faq-group-head .count{display:none;}
  .form-card,.info-card{padding:22px;}
  .btn-main,.btn-ghost,.btn-invert,.btn-outline-inv{width:100%;}
  .cta-band .acts{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:520px){
  .brand-text span{display:none;}
  .hero-tags .pill{font-size:12.5px;padding:6px 12px;}
}