/* roulang page: index */
:root{
  --pri:#5B4BE8;
  --acc:#0FB5A6;
  --warm:#FF7A45;
  --grad:linear-gradient(135deg,#5B4BE8 0%,#12C2B4 100%);
  --bg:#F6F7FB;
  --card:#FFFFFF;
  --ink:#101425;
  --line:#E6E8F2;
  --t2:#4A5068;
  --t3:#8A90A6;
  --tint:rgba(91,75,232,.06);
  --r-s:12px;
  --r-m:16px;
  --r-c:20px;
  --r-l:28px;
  --sh-s:0 2px 8px rgba(16,20,37,.05);
  --sh-m:0 12px 32px rgba(16,20,37,.08);
  --sh-l:0 24px 64px rgba(91,75,232,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.75;
  color:var(--t2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:rgba(91,75,232,.18);}
.brand-strip{position:fixed;top:0;left:0;right:0;height:3px;background:var(--grad);z-index:1060;}
.container{max-width:1200px;padding-left:32px;padding-right:32px;}
.num{font-variant-numeric:tabular-nums;}

/* ---------- 通用按钮 ---------- */
.btn-grad{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:0;border-radius:var(--r-s);
  color:#fff;font-size:15.5px;font-weight:600;cursor:pointer;
  background-image:linear-gradient(135deg,#5B4BE8 0%,#12C2B4 50%,#5B4BE8 100%);
  background-size:220% 100%;background-position:0 0;
  transition:background-position .3s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-grad:hover{background-position:100% 0;transform:scale(1.02);box-shadow:var(--sh-m);color:#fff;}
.btn-grad:active{transform:translateY(1px) scale(1);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-s);
  background:#fff;border:1px solid var(--line);color:var(--ink);
  font-size:15.5px;font-weight:600;
  transition:border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-ghost:hover{border-color:var(--pri);color:var(--pri);box-shadow:var(--sh-s);}
.btn-ghost:active{transform:translateY(1px);}
.text-link{
  display:inline-flex;align-items:center;gap:6px;color:var(--pri);font-size:15px;font-weight:600;
  position:relative;
}
.text-link .arw{transition:transform .2s var(--ease);}
.text-link:hover .arw{transform:translateX(3px);}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--pri);outline-offset:2px;border-radius:6px;
}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(246,247,251,.92);
  border-bottom:1px solid transparent;
  transition:background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.scrolled{
  background:#fff;
  border-bottom:1px solid rgba(16,20,37,.06);
  box-shadow:0 4px 20px rgba(16,20,37,.05);
}
.nav-desktop{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:76px;gap:16px;
}
.nav-side{display:flex;align-items:center;gap:28px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;}
.nav-link-item{
  font-size:15px;font-weight:500;color:var(--t2);position:relative;padding:6px 0;
  transition:color .2s var(--ease);white-space:nowrap;
}
.nav-link-item::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--grad);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link-item:hover{color:var(--pri);}
.nav-link-item:hover::after{transform:scaleX(1);}
.nav-link-item.active{color:var(--pri);font-weight:600;}
.nav-link-item.active::after{transform:scaleX(1);}
.logo{display:inline-flex;align-items:center;gap:10px;justify-self:center;}
.logo-mark{
  width:30px;height:30px;border-radius:9px;background:var(--grad);
  position:relative;flex:0 0 auto;
}
.logo-mark::after{
  content:"";position:absolute;inset:9px;border-radius:3px;background:#fff;opacity:.92;
}
.logo-text{
  font-size:17.5px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;
}
.btn-nav{height:44px;padding:0 20px;font-size:15px;}
.nav-mobile-bar{display:none;}

/* 移动导航 */
.mobile-nav{width:320px;max-width:86vw;}
.mobile-nav .offcanvas-header{
  border-bottom:1px solid var(--line);padding:18px 22px;
}
.mobile-nav .offcanvas-body{padding:20px 22px 28px;display:flex;flex-direction:column;}
.mobile-nav-list li{border-bottom:1px solid var(--line);}
.mobile-nav-list a{
  display:flex;align-items:center;min-height:52px;font-size:16px;font-weight:500;color:var(--t2);
}
.mobile-nav-list a.active{color:var(--pri);font-weight:600;}
.mx-close{
  width:36px;height:36px;border:1px solid var(--line);background:#fff;border-radius:10px;
  color:var(--t2);font-size:18px;line-height:1;cursor:pointer;
}

/* ---------- 板块通用 ---------- */
.sec{padding:96px 0;}
.sec-tight{padding:72px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:14px;font-weight:600;color:var(--acc);letter-spacing:.02em;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--grad);}
.sec-title{font-size:34px;line-height:1.3;font-weight:700;letter-spacing:-.01em;}
.sec-lead{font-size:16.5px;color:var(--t2);margin-top:14px;max-width:620px;}
.pill{
  display:inline-flex;align-items:center;
  padding:5px 14px;border-radius:999px;font-size:13.5px;font-weight:600;
  color:var(--pri);background:rgba(91,75,232,.09);
}
.pill-warm{color:var(--warm);background:rgba(255,122,69,.12);}

/* ---------- Hero ---------- */
.hero{padding:64px 0 96px;position:relative;}
.hero::before{
  content:"";position:absolute;top:-120px;right:-140px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(91,75,232,.18) 0%,rgba(18,194,180,.10) 45%,rgba(246,247,251,0) 72%);
  pointer-events:none;z-index:0;
}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.hero-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:13.5px;font-weight:600;color:var(--pri);box-shadow:var(--sh-s);margin-bottom:22px;
}
.hero-pill .dot{width:7px;height:7px;border-radius:50%;background:var(--grad);}
h1{
  font-size:48px;line-height:1.2;font-weight:800;letter-spacing:-.02em;color:var(--ink);
}
.hero-sub{font-size:17px;color:var(--t2);margin-top:20px;max-width:560px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.stat-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:44px;
  border-top:1px solid var(--line);padding-top:26px;
}
.stat-num{
  font-size:30px;font-weight:800;line-height:1.15;color:var(--ink);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.stat-num.warm{color:var(--warm);}
.stat-num.grad{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat-label{font-size:13px;color:var(--t3);line-height:1.5;margin-top:4px;}
.hero-visual{
  position:relative;border-radius:var(--r-l);overflow:hidden;
  box-shadow:var(--sh-l);background:var(--grad);
}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(91,75,232,.16),rgba(18,194,180,.14));
}
.float-card{
  position:absolute;z-index:2;background:#fff;border-radius:var(--r-m);
  padding:12px 16px;box-shadow:var(--sh-m);min-width:132px;
}
.float-card strong{
  display:block;font-size:21px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;
}
.float-card span{font-size:12.5px;color:var(--t3);}
.fc-1{left:18px;bottom:18px;}
.fc-2{right:18px;top:18px;}
.fc-2 strong{color:var(--warm);}

/* ---------- 价值主张 ---------- */
.value-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start;}
.value-list{margin-top:-6px;}
.value-item{
  display:flex;align-items:center;gap:20px;
  padding:22px 20px;border-top:1px solid var(--line);
  border-radius:var(--r-m);
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.value-item:last-child{border-bottom:1px solid var(--line);}
.value-item:hover{background:var(--tint);transform:translateX(4px);}
.value-num{
  width:46px;height:46px;flex:0 0 auto;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:800;color:#fff;background:var(--grad);
  font-variant-numeric:tabular-nums;
}
.value-body h3{font-size:20px;font-weight:650;line-height:1.4;}
.value-body p{font-size:15px;color:var(--t2);margin-top:4px;}
.value-arw{margin-left:auto;color:var(--t3);font-size:18px;transition:transform .2s var(--ease),color .2s var(--ease);}
.value-item:hover .value-arw{transform:translateX(4px);color:var(--pri);}

/* ---------- 功能分组 ---------- */
.feature-band{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.feature-band.tinted{background:rgba(91,75,232,.045);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.feature-row{display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center;}
.feature-row.rev .feature-media{order:2;}
.feature-frame{
  padding:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-l);
  box-shadow:var(--sh-s);position:relative;
}
.feature-frame img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-m);
  background:linear-gradient(135deg,rgba(91,75,232,.14),rgba(18,194,180,.14));
}
.frame-badge{
  position:absolute;right:24px;bottom:24px;background:#fff;border-radius:999px;
  padding:8px 16px;box-shadow:var(--sh-m);font-size:13px;font-weight:600;color:var(--t2);
  display:flex;align-items:center;gap:8px;
}
.frame-badge b{color:var(--warm);font-size:16px;font-variant-numeric:tabular-nums;}
.feature-body h3{font-size:25px;line-height:1.4;font-weight:700;}
.feature-body p{font-size:16px;margin-top:16px;}
.points{margin-top:22px;display:grid;gap:12px;}
.points li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--t2);}
.points li::before{
  content:"";flex:0 0 auto;width:20px;height:20px;border-radius:50%;margin-top:6px;
  background:rgba(15,181,166,.14);
  box-shadow:inset 0 0 0 1px rgba(15,181,166,.35);
  background-image:linear-gradient(135deg,#5B4BE8,#12C2B4);
  background-size:9px 9px;background-repeat:no-repeat;background-position:center;
  clip-path:circle(50%);
  opacity:.9;
}
.points li span{display:block;}
.feature-body .text-link{margin-top:24px;}

/* ---------- 场景 bento ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;margin-top:48px;}
.bento-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-c);
  padding:26px;box-shadow:var(--sh-s);position:relative;overflow:hidden;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  display:flex;flex-direction:column;gap:14px;
}
.bento-card:hover{transform:translateY(-4px);box-shadow:var(--sh-m);border-color:rgba(91,75,232,.35);}
.bento-card h3{font-size:20px;font-weight:650;}
.bento-card p{font-size:15px;color:var(--t2);}
.bento-lg{grid-column:span 8;}
.bento-sm{grid-column:span 4;}
.bento-third{grid-column:span 4;}
.bento-cover{
  border-radius:var(--r-m);overflow:hidden;position:relative;background:var(--grad);
}
.bento-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.bento-lg .bento-cover img{aspect-ratio:16/7;}
.bento-cover::after{
  content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(91,75,232,.14),rgba(18,194,180,.12));
}
.bento-stat{
  display:inline-flex;align-items:baseline;gap:6px;
  padding:7px 14px;border-radius:999px;background:rgba(91,75,232,.07);align-self:flex-start;
}
.bento-stat b{font-size:19px;font-weight:800;color:var(--warm);font-variant-numeric:tabular-nums;}
.bento-stat span{font-size:12.5px;color:var(--t3);}
.bento-icon{
  width:44px;height:44px;border-radius:14px;background:rgba(15,181,166,.12);
  display:flex;align-items:center;justify-content:center;color:var(--acc);font-size:19px;font-weight:800;
}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;margin-top:48px;}
.case-main{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-l);
  padding:32px;box-shadow:var(--sh-m);display:grid;gap:22px;
}
.case-main h3{font-size:23px;font-weight:700;}
.case-cover{border-radius:var(--r-m);overflow:hidden;background:var(--grad);}
.case-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.case-metrics{display:flex;flex-wrap:wrap;gap:12px;}
.metric{
  background:var(--bg);border:1px solid var(--line);border-radius:999px;
  padding:8px 18px;display:flex;align-items:baseline;gap:8px;
}
.metric b{font-size:19px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;}
.metric.warm b{color:var(--warm);}
.metric span{font-size:13px;color:var(--t3);}
.case-side{display:grid;gap:24px;align-content:start;}
.case-mini{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-c);
  padding:26px;box-shadow:var(--sh-s);transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.case-mini:hover{transform:translateY(-4px);box-shadow:var(--sh-m);}
.case-mini h4{font-size:17px;font-weight:650;color:var(--ink);}
.case-mini p{font-size:15px;color:var(--t2);margin-top:10px;}
.case-mini .metric{margin-top:16px;}

/* ---------- 价格 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:52px;align-items:stretch;}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-c);
  padding:32px 28px;box-shadow:var(--sh-s);display:flex;flex-direction:column;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--sh-m);}
.price-card.featured{
  border:2px solid transparent;
  background-image:linear-gradient(#fff,#fff),var(--grad);
  background-origin:border-box;background-clip:padding-box,border-box;
  box-shadow:var(--sh-l);transform:translateY(-8px);
}
.price-card.featured:hover{transform:translateY(-12px);}
.price-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.price-name{font-size:19px;font-weight:700;color:var(--ink);}
.price-amount{margin-top:18px;display:flex;align-items:baseline;gap:6px;}
.price-amount b{
  font-size:38px;font-weight:800;letter-spacing:-.02em;color:var(--ink);
  font-variant-numeric:tabular-nums;
}
.price-amount small{font-size:14px;color:var(--t3);}
.price-note{font-size:13px;color:var(--t3);margin-top:6px;}
.price-feats{margin:26px 0;display:grid;gap:12px;flex:1;}
.price-feats li{display:flex;gap:10px;font-size:15px;color:var(--t2);align-items:flex-start;}
.price-feats li::before{
  content:"✓";flex:0 0 auto;width:20px;height:20px;border-radius:50%;
  background:rgba(91,75,232,.10);color:var(--pri);font-size:12px;font-weight:800;
  display:flex;align-items:center;justify-content:center;margin-top:5px;
}
.price-foot{font-size:13px;color:var(--t3);margin-top:18px;}

/* ---------- 资讯列表 ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:44px;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-c);
  overflow:hidden;box-shadow:var(--sh-s);display:flex;flex-direction:column;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-m);border-color:rgba(91,75,232,.35);}
.news-cover{display:block;background:var(--grad);}
.news-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.news-body h3{
  font-size:18px;line-height:1.45;font-weight:650;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body h3 a{transition:color .2s var(--ease);}
.news-body h3 a:hover{color:var(--pri);}
.news-body p{
  font-size:15px;color:var(--t2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid var(--line);padding-top:14px;margin-top:auto;
}
.news-foot time{font-size:13px;color:var(--t3);font-variant-numeric:tabular-nums;}
.news-foot .text-link{font-size:14px;}
.empty-state{
  grid-column:1/-1;background:#fff;border:1px dashed var(--line);border-radius:var(--r-c);
  padding:56px 24px;text-align:center;box-shadow:var(--sh-s);
}
.empty-state .eicon{
  width:56px;height:56px;border-radius:18px;background:var(--tint);
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;
  color:var(--pri);font-size:24px;font-weight:800;
}
.empty-state p{font-size:16px;color:var(--t2);margin-bottom:20px;}

/* ---------- FAQ ---------- */
.faq-wrap{margin-top:44px;max-width:880px;}
.faq-acc .accordion-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);
  margin-bottom:12px;overflow:hidden;
}
.faq-acc .accordion-button{
  background:#fff;color:var(--ink);font-size:16.5px;font-weight:500;
  padding:20px 52px 20px 24px;box-shadow:none;position:relative;
  border-radius:var(--r-m);
}
.faq-acc .accordion-button::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--grad);opacity:0;transition:opacity .2s var(--ease);
}
.faq-acc .accordion-button:not(.collapsed)::before{opacity:1;}
.faq-acc .accordion-button:not(.collapsed){color:var(--pri);background:rgba(91,75,232,.035);}
.faq-acc .accordion-button:focus{box-shadow:none;}
.faq-acc .accordion-button::after{
  transition:transform .2s var(--ease);background-size:1rem;width:1rem;height:1rem;
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:rotate(-90deg);}
.faq-acc .accordion-body{font-size:15px;line-height:1.85;color:var(--t2);padding:4px 24px 22px;}

/* ---------- 底部 CTA ---------- */
.cta-band{
  background:var(--ink);color:rgba(255,255,255,.78);position:relative;overflow:hidden;
  border-top:3px solid transparent;
  border-image:var(--grad) 1;
}
.cta-band::before{
  content:"";position:absolute;right:-160px;top:-160px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(91,75,232,.42),rgba(18,194,180,.14) 55%,rgba(16,20,37,0) 75%);
}
.cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;padding:80px 0;}
.cta-band h2{color:#fff;font-size:32px;line-height:1.35;}
.cta-band p{margin-top:16px;font-size:16px;max-width:520px;}
.inline-form{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-c);padding:24px;
}
.inline-form label{display:block;font-size:13.5px;color:rgba(255,255,255,.72);margin-bottom:8px;}
.inline-form .row-in{display:flex;gap:12px;}
.inline-form input{
  flex:1;height:48px;border-radius:var(--r-s);border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.96);padding:0 16px;font-size:15px;color:var(--ink);
}
.inline-form input::placeholder{color:var(--t3);}
.inline-form .hint{font-size:12.5px;color:rgba(255,255,255,.55);margin-top:12px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);border-top:3px solid transparent;border-image:var(--grad) 1;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:64px 0 40px;
}
.footer-brand .logo-text{color:#fff;}
.footer-brand p{font-size:14px;margin-top:16px;max-width:280px;line-height:1.7;}
.footer-brand .btn-ghost{
  background:transparent;border-color:rgba(255,255,255,.22);color:#fff;height:44px;margin-top:20px;
}
.footer-brand .btn-ghost:hover{border-color:var(--acc);color:var(--acc);}
.footer-col h4{color:#fff;font-size:15px;font-weight:650;margin-bottom:18px;}
.footer-col li{margin-bottom:12px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--acc);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0 30px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);
}
.footer-bottom a{color:rgba(255,255,255,.6);}
.footer-bottom a:hover{color:var(--acc);}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:26px;bottom:26px;width:48px;height:48px;border-radius:50%;
  background:var(--grad);color:#fff;border:0;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-m);cursor:pointer;opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s var(--ease),transform .18s var(--ease);
  z-index:1040;font-size:18px;
}
.to-top.show{opacity:1;visibility:visible;}
.to-top:hover{transform:translateY(-3px);}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .container{padding-left:24px;padding-right:24px;}
  h1{font-size:40px;}
  .hero-grid{gap:40px;}
  .feature-row{gap:40px;}
}
@media (max-width:991.98px){
  .nav-desktop{display:none;}
  .nav-mobile-bar{
    display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:64px;
  }
  .nav-mobile-bar .left{display:flex;justify-content:flex-start;}
  .nav-mobile-bar .right{display:flex;justify-content:flex-end;}
  .nav-burger{
    width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;
    display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;
  }
  .nav-burger span{width:18px;height:2px;border-radius:2px;background:var(--ink);display:block;}
  .btn-nav-sm{height:44px;padding:0 16px;font-size:14.5px;}
  .hero{padding:40px 0 72px;}
  h1{font-size:34px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-visual{max-width:640px;}
  .stat-row{grid-template-columns:repeat(2,1fr);gap:20px 14px;}
  .value-grid{grid-template-columns:1fr;gap:32px;}
  .feature-row{grid-template-columns:1fr;gap:32px;}
  .feature-row.rev .feature-media{order:0;}
  .sec{padding:72px 0;}
  .sec-title{font-size:27px;}
  .bento-lg,.bento-sm,.bento-third{grid-column:span 12;}
  .case-grid{grid-template-columns:1fr;}
  .price-grid{grid-template-columns:1fr;}
  .price-card.featured{transform:none;order:-1;}
  .price-card.featured:hover{transform:translateY(-4px);}
  .news-grid{grid-template-columns:1fr 1fr;}
  .cta-inner{grid-template-columns:1fr;gap:32px;padding:64px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 32px;}
}
@media (max-width:575.98px){
  .container{padding-left:16px;padding-right:16px;}
  body{font-size:16px;}
  h1{font-size:30px;line-height:1.26;}
  .hero{padding:28px 0 56px;}
  .hero-sub{font-size:16px;}
  .hero-cta{gap:12px;}
  .hero-cta .btn-grad,.hero-cta .btn-ghost{width:100%;}
  .stat-num{font-size:26px;}
  .sec{padding:56px 0;}
  .sec-title{font-size:24px;}
  .feature-body h3{font-size:21px;}
  .news-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .inline-form .row-in{flex-direction:column;}
  .inline-form .btn-grad{width:100%;}
  .to-top{right:16px;bottom:16px;}
  .float-card{min-width:112px;padding:10px 12px;}
  .float-card strong{font-size:18px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:color .15s linear !important;}
  .bento-card:hover,.news-card:hover,.case-mini:hover,.price-card:hover,.value-item:hover{transform:none !important;}
}

/* roulang page: article */
:root{
  --brand-primary:#5B4BE8;
  --brand-accent:#0FB5A6;
  --brand-warm:#FF7A45;
  --brand-grad:linear-gradient(135deg,#5B4BE8 0%,#12C2B4 100%);
  --bg-page:#F6F7FB;
  --bg-card:#FFFFFF;
  --bg-soft:#F1F0FE;
  --bg-soft-2:#EFF8F7;
  --ink:#101425;
  --text-2:#4A5068;
  --text-3:#8A90A6;
  --line:#E6E8F2;
  --radius-card:20px;
  --radius-big:28px;
  --radius-btn:12px;
  --radius-pill:999px;
  --shadow-sm:0 2px 8px rgba(16,20,37,.05);
  --shadow-md:0 12px 32px rgba(16,20,37,.08);
  --shadow-lg:0 24px 64px rgba(91,75,232,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  padding:0;
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text-2);
  background:var(--bg-page);
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand-primary)}
button{font-family:inherit}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand-primary);outline-offset:2px;border-radius:4px}
.container{max-width:1200px;margin:0 auto;padding:0 32px;width:100%}
.container-wide{max-width:1240px;margin:0 auto;padding:0 32px;width:100%}
.topline{height:3px;background:var(--brand-grad);width:100%}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--brand-accent);letter-spacing:.02em;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand-grad);border-radius:2px}
.eyebrow.warm{color:var(--brand-warm)}
.eyebrow.warm::before{background:linear-gradient(135deg,#FF7A45 0%,#FFB088 100%)}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid rgba(16,20,37,.06);
  transition:box-shadow .2s var(--ease),background .2s var(--ease);
}
.site-header.scrolled{box-shadow:var(--shadow-sm);background:#fff}
.nav-desktop{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:76px;gap:16px;
}
.nav-side{display:flex;align-items:center;gap:28px}
.nav-left{justify-content:flex-start}
.nav-right{justify-content:flex-end}
.nav-link-item{
  position:relative;font-size:15px;font-weight:500;color:var(--text-2);
  padding:6px 0;white-space:nowrap;
}
.nav-link-item::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--brand-grad);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-link-item:hover{color:var(--brand-primary)}
.nav-link-item:hover::after,.nav-link-item.active::after{transform:scaleX(1)}
.nav-link-item.active{color:var(--brand-primary);font-weight:600}
.logo{display:inline-flex;align-items:center;gap:10px}
.logo-mark{
  width:28px;height:28px;border-radius:9px;flex:0 0 28px;
  background:var(--brand-grad);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;inset:9px;border-radius:3px;background:#fff;opacity:.92;
}
.logo-text{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.btn-grad{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:0;border-radius:var(--radius-btn);
  color:#fff;font-size:15px;font-weight:600;cursor:pointer;
  background:var(--brand-grad);background-size:160% 160%;background-position:0% 50%;
  transition:background-position .3s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-grad:hover{color:#fff;background-position:100% 50%;transform:scale(1.02);box-shadow:var(--shadow-md)}
.btn-grad:active{transform:translateY(1px)}
.btn-nav{height:42px;padding:0 20px;font-size:14px}
.btn-nav-sm{height:38px;padding:0 16px;font-size:14px}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  background:#fff;border:1px solid var(--line);color:var(--ink);
  font-size:15px;font-weight:600;cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-ghost:hover{border-color:var(--brand-primary);color:var(--brand-primary);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand-primary);
}
.btn-link-arrow i{transition:transform .18s var(--ease);font-style:normal}
.btn-link-arrow:hover i{transform:translateX(3px)}
.nav-mobile-bar{display:none}
.nav-burger{
  width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;
  display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer;
}
.nav-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink)}
.nav-offcanvas{border-left:1px solid var(--line);width:min(86vw,340px)}
.offcanvas-header{border-bottom:1px solid var(--line);padding:18px 20px}
.mobile-nav-list{display:flex;flex-direction:column;gap:4px;margin-bottom:24px}
.mobile-nav-list a{
  display:flex;align-items:center;min-height:48px;padding:0 12px;border-radius:12px;
  font-size:16px;color:var(--ink);font-weight:500;
}
.mobile-nav-list a:hover,.mobile-nav-list a.active{background:var(--bg-soft);color:var(--brand-primary)}

/* ============ breadcrumb ============ */
.crumbs{padding:20px 0}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--text-3)}
.crumbs li{display:inline-flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:#C6CADB}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--brand-primary)}
.crumbs .current{color:var(--ink);font-weight:500}

/* ============ article head ============ */
.article-hero{padding:12px 0 40px}
.article-head{max-width:860px}
.article-head .tag-pill{margin-bottom:18px}
.tag-pill{
  display:inline-flex;align-items:center;gap:6px;height:30px;padding:0 14px;
  border-radius:var(--radius-pill);background:var(--bg-soft);
  color:var(--brand-primary);font-size:13px;font-weight:600;
}
.article-head h1{
  font-size:42px;line-height:1.24;font-weight:800;letter-spacing:-.02em;
  margin-bottom:20px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px;
  font-size:14px;color:var(--text-3);
}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C6CADB}
.meta-chip{display:inline-flex;align-items:center;gap:7px}
.meta-chip i{font-style:normal;color:var(--brand-accent);font-weight:700}

/* ============ article layout ============ */
.article-shell{padding-bottom:96px}
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 246px;gap:56px;align-items:start;
}
.article-main{min-width:0}
.article-figure{
  border-radius:var(--radius-big);overflow:hidden;position:relative;
  box-shadow:var(--shadow-md);margin-bottom:36px;background:var(--bg-soft);
}
.article-figure img{width:100%;aspect-ratio:16/7;object-fit:cover}
.article-figure::after{
  content:"";position:absolute;inset:0;background:var(--brand-grad);opacity:.12;pointer-events:none;
}
.article-panel{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-big);
  padding:44px 48px;box-shadow:var(--shadow-sm);
}
.article-body{font-size:17px;line-height:1.9;color:var(--text-2)}
.article-body>p:first-of-type{font-size:18px;color:var(--ink)}
.article-body p{margin:0 0 22px}
.article-body h2{
  font-size:28px;line-height:1.35;font-weight:700;margin:44px 0 16px;
  padding-left:16px;position:relative;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:4px;border-radius:4px;background:var(--brand-grad);
}
.article-body h3{font-size:21px;line-height:1.45;font-weight:650;margin:30px 0 12px}
.article-body h4{font-size:18px;margin:24px 0 10px}
.article-body a{color:var(--brand-primary);border-bottom:1px solid rgba(91,75,232,.32)}
.article-body strong{color:var(--ink);font-weight:700}
.article-body ul{margin:0 0 22px}
.article-body ul li{position:relative;padding-left:24px;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:11px;width:8px;height:8px;border-radius:50%;
  background:var(--brand-primary);opacity:.85;
}
.article-body ol{margin:0 0 22px;padding-left:24px;list-style:decimal}
.article-body ol li{margin-bottom:10px;padding-left:4px}
.article-body ol li::marker{color:var(--brand-primary);font-weight:700}
.article-body blockquote{
  margin:0 0 24px;padding:20px 24px;background:var(--bg-soft);
  border-left:4px solid transparent;
  border-image:var(--brand-grad) 1;
  border-radius:0 16px 16px 0;color:var(--ink);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:16px;margin:26px auto}
.article-body figure{margin:26px 0}
.article-body figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}
.article-body pre{
  background:#F1F2F7;border:1px dashed #D9DCEA;border-radius:12px;
  padding:18px 20px;overflow:auto;font-size:14px;line-height:1.7;margin:0 0 24px;color:var(--ink);
}
.article-body code{
  background:#F1F2F7;border-radius:6px;padding:2px 6px;font-size:14px;color:var(--brand-primary);
}
.article-body pre code{background:none;padding:0;color:var(--ink)}
.article-body table{
  width:100%;border-collapse:collapse;margin:0 0 26px;font-size:15px;
  border:1px solid var(--line);border-radius:14px;overflow:hidden;
}
.article-body thead th{background:var(--bg-soft);color:var(--ink);font-weight:650;text-align:left}
.article-body th,.article-body td{padding:12px 16px;border-bottom:1px solid var(--line)}
.article-body tbody tr:nth-child(even){background:#FAFAFE}
.article-body hr{border:0;border-top:1px dashed #D9DCEA;margin:36px 0}

/* sticky toc */
.article-toc{position:sticky;top:100px}
.toc-card{
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:20px;box-shadow:var(--shadow-sm);
}
.toc-card h4{font-size:14px;font-weight:700;color:var(--text-3);letter-spacing:.06em;margin-bottom:12px}
.toc-card ol{display:flex;flex-direction:column;gap:2px}
.toc-card a{
  display:block;font-size:14px;line-height:1.5;color:var(--text-2);
  padding:7px 10px;border-radius:10px;border-left:2px solid transparent;
}
.toc-card a:hover{background:var(--bg-soft);color:var(--brand-primary);border-left-color:var(--brand-primary)}
.article-toc.is-hidden{display:none}

/* footer of article */
.article-foot{
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
  margin-top:36px;padding-top:24px;border-top:1px dashed #D9DCEA;
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag-row a{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--radius-pill);
  background:var(--bg-soft);color:var(--brand-primary);font-size:13px;font-weight:600;
}
.tag-row a:nth-child(3n){background:var(--bg-soft-2);color:#0C8C81}
.share-row{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3)}
.share-row a{
  display:inline-flex;align-items:center;justify-content:center;height:34px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--radius-pill);color:var(--text-2);font-size:13px;
}
.share-row a:hover{border-color:var(--brand-primary);color:var(--brand-primary)}

.article-empty{
  background:var(--bg-card);border:1px dashed #D9DCEA;border-radius:var(--radius-big);
  padding:56px 40px;text-align:center;box-shadow:var(--shadow-sm);
}
.article-empty .icon{
  width:60px;height:60px;border-radius:18px;margin:0 auto 20px;
  background:var(--brand-grad);opacity:.9;display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:24px;font-weight:800;
}
.article-empty h2{font-size:24px;margin-bottom:12px}
.article-empty p{margin-bottom:24px}

/* ============ related ============ */
.section{padding:88px 0}
.section-head{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;margin-bottom:36px}
.section-head h2{font-size:32px;line-height:1.3}
.section-head p{font-size:15px;color:var(--text-3);margin-top:10px}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
  height:100%;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(91,75,232,.35)}
.post-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft);position:relative}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.post-card:hover .thumb img{transform:scale(1.04)}
.post-card .body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.post-card h3{font-size:19px;line-height:1.45;font-weight:650}
.post-card p{font-size:14px;line-height:1.7;color:var(--text-2);flex:1}
.post-card .foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:0 22px 20px;font-size:13px;color:var(--text-3);
}
.post-card .foot .more{color:var(--brand-primary);font-weight:600}
.back-row{display:flex;justify-content:center;margin-top:40px}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px;margin:0 auto}
.accordion-item{
  background:var(--bg-card);border:1px solid var(--line)!important;border-radius:16px!important;
  margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow-sm);
}
.accordion-button{
  background:var(--bg-card)!important;color:var(--ink)!important;
  font-size:17px;font-weight:500;padding:20px 24px;box-shadow:none!important;
  position:relative;
}
.accordion-button::after{
  background-image:none!important;content:"›";
  font-size:24px;color:var(--brand-primary);transform:rotate(90deg);
  transition:transform .2s var(--ease);width:auto;height:auto;
  display:flex;align-items:center;justify-content:center;line-height:1;
}
.accordion-button:not(.collapsed)::after{transform:rotate(-90deg)}
.accordion-button:not(.collapsed){color:var(--brand-primary)!important}
.accordion-item:has(.accordion-button:not(.collapsed)){border-left:3px solid transparent!important;border-image:var(--brand-grad) 1;box-shadow:var(--shadow-md)}
.accordion-body{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--text-2)}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-big);
  background:#101425;color:#fff;padding:56px 56px;
  box-shadow:var(--shadow-lg);
}
.cta-band::before{
  content:"";position:absolute;inset:0;background:var(--brand-grad);opacity:.16;pointer-events:none;
}
.cta-band .inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.cta-band h2{color:#fff;font-size:30px;line-height:1.35;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.74);font-size:15px;max-width:46ch}
.inline-form{display:flex;gap:12px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:16px;padding:12px}
.inline-form input{
  flex:1;min-width:0;height:48px;border-radius:var(--radius-btn);border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.94);padding:0 16px;font-size:15px;color:var(--ink);
}
.inline-form input:focus{outline:2px solid var(--brand-accent);outline-offset:1px}
.form-note{margin-top:12px;font-size:13px;color:rgba(255,255,255,.6)}

/* ============ footer ============ */
.site-footer{background:#101425;color:rgba(255,255,255,.72);margin-top:96px;position:relative}
.site-footer::before{content:"";display:block;height:3px;background:var(--brand-grad)}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding:64px 0 40px;
}
.footer-brand .logo-text{color:#fff}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);margin:16px 0 20px;max-width:32ch}
.footer-col h4{color:#fff;font-size:15px;font-weight:650;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#12C2B4}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,.12);padding:22px 0;font-size:13px;color:rgba(255,255,255,.6);
}
.btn-ghost-dark{
  display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 22px;
  border-radius:var(--radius-btn);border:1px solid rgba(255,255,255,.24);color:#fff;
  font-size:14px;font-weight:600;background:transparent;
}
.btn-ghost-dark:hover{border-color:#12C2B4;color:#12C2B4}

/* ============ to top ============ */
#toTop{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  border:0;background:var(--brand-grad);color:#fff;font-size:18px;cursor:pointer;
  box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;z-index:1040;
}
#toTop.show{opacity:1;visibility:visible;transform:translateY(0)}
#toTop:hover{transform:translateY(-3px)}

/* ============ responsive ============ */
@media (max-width:1199.98px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-toc{display:none}
  .article-head h1{font-size:38px}
  .container,.container-wide{padding:0 24px}
}
@media (max-width:991.98px){
  .nav-desktop{display:none}
  .nav-mobile-bar{
    display:flex;align-items:center;justify-content:space-between;
    height:64px;gap:12px;position:relative;
  }
  .nav-mobile-bar .left,.nav-mobile-bar .right{flex:1 1 0;display:flex;align-items:center}
  .nav-mobile-bar .right{justify-content:flex-end}
  .nav-mobile-bar .logo{
    position:absolute;left:50%;transform:translateX(-50%);
  }
  .nav-mobile-bar .logo-mark{width:24px;height:24px;flex:0 0 24px}
  .nav-mobile-bar .logo-text{font-size:16px}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-band{padding:40px 28px}
  .cta-band .inner{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 32px}
  .article-panel{padding:32px 26px}
  .article-head h1{font-size:32px}
  .section{padding:64px 0}
  .section-head h2{font-size:26px}
}
@media (max-width:575.98px){
  .container,.container-wide{padding:0 16px}
  .article-head h1{font-size:28px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{font-size:23px;margin-top:36px}
  .article-panel{padding:24px 18px;border-radius:var(--radius-card)}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .inline-form{flex-direction:column}
  .inline-form .btn-grad{width:100%}
  .article-figure img{aspect-ratio:16/9}
  .logo-text{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-property:color,background-color,border-color,box-shadow!important}
  .post-card:hover{transform:none}
  .btn-grad:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --brand:#5B4BE8;
  --accent:#0FB5A6;
  --warm:#FF7A45;
  --grad:linear-gradient(135deg,#5B4BE8 0%,#12C2B4 100%);
  --grad-soft:linear-gradient(135deg,rgba(91,75,232,.10) 0%,rgba(18,194,180,.10) 100%);
  --bg:#F6F7FB;
  --card:#FFFFFF;
  --ink:#101425;
  --t2:#4A5068;
  --t3:#8A90A6;
  --line:#E6E8F2;
  --r-card:20px;
  --r-lg:28px;
  --r-btn:12px;
  --sh-sm:0 2px 8px rgba(16,20,37,.05);
  --sh-md:0 12px 32px rgba(16,20,37,.08);
  --sh-lg:0 24px 64px rgba(91,75,232,.14);
  --sh-hard:6px 6px 0 rgba(16,20,37,.06);
  --ease:cubic-bezier(.2,.7,.3,1);
  --gap-s:16px;
  --gap-m:24px;
  --gap-l:48px;
  --sec:96px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--t2);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;top:0;left:0;right:0;height:3px;
  background:var(--grad);z-index:2050;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand);}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--ink);margin:0;font-weight:700;}
p{margin:0 0 16px;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1264px;margin:0 auto;padding:0 32px;}
.sec{padding:var(--sec) 0;}
.sec-sm{padding:72px 0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:14px;font-weight:600;letter-spacing:.04em;
  color:var(--accent);margin-bottom:14px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--grad);border-radius:2px;}
.eyebrow.warm{color:var(--warm);}
.h2{font-size:34px;line-height:1.3;font-weight:700;letter-spacing:-.01em;}
.h3{font-size:21px;line-height:1.4;font-weight:650;}
.lead{font-size:17px;color:var(--t2);max-width:760px;}
.muted{color:var(--t3);font-size:14px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1800;
  height:76px;
  background:rgba(246,247,251,.92);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid transparent;
  transition:background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{
  background:#fff;
  border-bottom:1px solid rgba(16,20,37,.06);
  box-shadow:0 2px 12px rgba(16,20,37,.05);
}
.site-header .container{height:100%;}
.nav-desktop{
  height:100%;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;gap:22px;}
.nav-link-item{
  font-size:15px;font-weight:500;color:var(--t2);position:relative;padding:6px 0;
  display:inline-block;line-height:1.4;
}
.nav-link-item::after{
  content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;
  background:var(--grad);border-radius:2px;
  transition:right .22s var(--ease);
}
.nav-link-item:hover{color:var(--brand);}
.nav-link-item:hover::after{right:0;}
.nav-link-item.active{color:var(--brand);font-weight:600;}
.nav-link-item.active::after{right:0;}
.logo{display:inline-flex;align-items:center;gap:10px;}
.logo-mark{
  width:26px;height:26px;border-radius:9px;background:var(--grad);
  position:relative;flex:0 0 auto;
  box-shadow:0 4px 12px rgba(91,75,232,.28);
}
.logo-mark::after{
  content:"";position:absolute;inset:7px 6px;border-radius:3px;
  background:rgba(255,255,255,.92);
}
.logo-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;}
.btn-grad{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:none;border-radius:var(--r-btn);
  background:var(--grad);background-size:180% 100%;background-position:0 0;
  color:#fff;font-size:15px;font-weight:600;cursor:pointer;
  transition:background-position .28s var(--ease),transform .18s var(--ease),box-shadow .2s var(--ease);
}
.btn-grad:hover{background-position:100% 0;transform:scale(1.02);box-shadow:var(--sh-md);color:#fff;}
.btn-grad:active{transform:translateY(1px);}
.btn-nav{height:42px;padding:0 18px;font-size:14px;border-radius:10px;}
.btn-nav-sm{height:36px;padding:0 14px;font-size:13px;border-radius:10px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  background:#fff;border:1px solid var(--line);color:var(--ink);
  font-size:15px;font-weight:600;
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);}
.btn-ghost-light{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 20px;border-radius:var(--r-btn);
  background:transparent;border:1px solid rgba(255,255,255,.28);color:#fff;
  font-size:15px;font-weight:600;transition:border-color .18s var(--ease),background .18s var(--ease);
}
.btn-ghost-light:hover{border-color:rgba(255,255,255,.6);background:rgba(255,255,255,.06);color:#fff;}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--brand);
}
.link-arrow i{transition:transform .2s var(--ease);font-size:13px;}
.link-arrow:hover i{transform:translateX(3px);}
.nav-mobile-bar{display:none;height:100%;grid-template-columns:1fr auto 1fr;align-items:center;}
.nav-mobile-bar .right{display:flex;justify-content:flex-end;}
.nav-burger{
  width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;cursor:pointer;
}
.nav-burger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;}
.offcanvas{--bs-offcanvas-width:320px;}
.mobile-nav{background:#fff;border-left:1px solid var(--line);}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--line);padding:20px 22px;}
.mobile-nav .offcanvas-body{padding:18px 22px 26px;display:flex;flex-direction:column;}
.mobile-nav a.m-item{
  display:block;padding:14px 4px;font-size:16px;color:var(--t2);border-bottom:1px solid var(--line);
}
.mobile-nav a.m-item.active{color:var(--brand);font-weight:600;}
.mobile-nav .btn-grad{margin-top:22px;width:100%;}

/* ---------- 面包屑 ---------- */
.crumb{
  font-size:14px;color:var(--t3);padding:20px 0;display:flex;align-items:center;gap:8px;flex-wrap:wrap;
}
.crumb a{color:var(--t3);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:#C7CBDA;}
.crumb .current{color:var(--ink);font-weight:500;}

/* ---------- 小 Hero ---------- */
.page-hero{padding:12px 0 56px;}
.hero-grid{display:grid;grid-template-columns:1fr 0.86fr;gap:52px;align-items:center;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:999px;background:rgba(91,75,232,.08);
  color:var(--brand);font-size:14px;font-weight:600;margin-bottom:18px;
}
.page-hero h1{
  font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.02em;margin-bottom:18px;
}
.page-hero h1 em{
  font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:18px;color:var(--t2);max-width:560px;margin-bottom:26px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
.hero-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-md);aspect-ratio:16/11;background:var(--grad-soft);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(91,75,232,.16) 0%,rgba(18,194,180,.12) 100%);
}
.float-badge{
  position:absolute;z-index:2;left:20px;bottom:20px;
  background:#fff;border-radius:999px;padding:10px 18px;box-shadow:var(--sh-md);
  display:flex;align-items:baseline;gap:6px;
}
.float-badge b{font-size:22px;font-weight:800;color:var(--brand);}
.float-badge span{font-size:13px;color:var(--t3);}

/* ---------- 目录 + 步骤 ---------- */
.split{display:grid;grid-template-columns:280px 1fr;gap:56px;align-items:start;}
.toc{
  position:sticky;top:104px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);
}
.toc h4{font-size:15px;letter-spacing:.04em;color:var(--t3);font-weight:600;margin-bottom:14px;}
.toc ol{counter-reset:toc;margin:0;padding:0;list-style:none;}
.toc li{counter-increment:toc;}
.toc a{
  display:flex;gap:10px;padding:9px 0;font-size:15px;color:var(--t2);line-height:1.5;
  border-bottom:1px dashed var(--line);
}
.toc li:last-child a{border-bottom:none;}
.toc a::before{
  content:counter(toc,decimal-leading-zero);
  font-size:13px;color:var(--brand);font-weight:700;flex:0 0 auto;
}
.toc a:hover{color:var(--brand);}
.toc-note{
  margin-top:18px;padding:14px 16px;border-radius:14px;background:var(--grad-soft);
  font-size:13px;line-height:1.7;color:var(--t2);
}
.steps{position:relative;padding-left:8px;}
.step{
  position:relative;display:grid;grid-template-columns:56px 1fr;gap:22px;
  padding:0 0 34px;
}
.step::before{
  content:"";position:absolute;left:27px;top:52px;bottom:6px;width:2px;
  background:linear-gradient(180deg,rgba(91,75,232,.35),rgba(18,194,180,.12));
}
.step:last-child{padding-bottom:0;}
.step:last-child::before{display:none;}
.step-num{
  width:56px;height:56px;border-radius:50%;background:#fff;border:1.5px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:800;color:var(--brand);box-shadow:var(--sh-sm);
}
.step-body{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px 26px;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.step-body:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(91,75,232,.35);}
.step-body h3{font-size:21px;font-weight:650;margin-bottom:10px;}
.step-body p{margin-bottom:0;font-size:16px;}
.step-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px;}
.pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:999px;background:rgba(91,75,232,.08);
  color:var(--brand);font-size:13px;font-weight:600;
}
.pill.teal{background:rgba(15,181,166,.10);color:#0A8B80;}
.pill.warm{background:rgba(255,122,69,.12);color:#D9531F;}

/* ---------- 准备检查清单 ---------- */
.check-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:40px;}
.check-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.check-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(91,75,232,.3);}
.check-icon{
  width:46px;height:46px;border-radius:14px;background:var(--grad-soft);
  display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:18px;margin-bottom:16px;
}
.check-card h3{font-size:18px;font-weight:650;margin-bottom:8px;}
.check-card p{font-size:15px;margin:0;color:var(--t2);}

/* ---------- 登录后可用操作（横向分区） ---------- */
.ops-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-md);overflow:hidden;
}
.ops-row{
  display:grid;grid-template-columns:220px 1fr;gap:28px;align-items:center;
  padding:28px 32px;border-bottom:1px solid var(--line);
  transition:background .2s var(--ease);
}
.ops-row:last-child{border-bottom:none;}
.ops-row:hover{background:#FAFAFF;}
.ops-row h3{font-size:19px;font-weight:650;display:flex;align-items:center;gap:10px;}
.ops-row h3 i{color:var(--accent);font-size:16px;}
.ops-row p{margin:0;font-size:15.5px;}

/* ---------- 相关文章 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;}
.rel-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-sm);display:flex;flex-direction:column;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:rgba(91,75,232,.3);}
.rel-media{aspect-ratio:16/9;overflow:hidden;background:var(--grad-soft);}
.rel-media img{width:100%;height:100%;object-fit:cover;}
.rel-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.rel-body h3{font-size:18px;line-height:1.5;font-weight:650;}
.rel-body p{font-size:15px;margin:0;color:var(--t2);}
.rel-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--t3);
}

/* ---------- FAQ ---------- */
.faq-sec{background:#fff;}
.accordion-item{
  border:1px solid var(--line)!important;border-radius:16px!important;
  margin-bottom:12px;overflow:hidden;background:#fff;position:relative;
}
.accordion-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--grad);
  opacity:0;transition:opacity .2s var(--ease);
}
.accordion-item:has(.accordion-button:not(.collapsed))::before{opacity:1;}
.accordion-button{
  position:relative;background:#fff!important;color:var(--ink)!important;
  font-size:16.5px;font-weight:500;padding:20px 56px 20px 24px;
  box-shadow:none!important;border-radius:16px!important;
}
.accordion-button:not(.collapsed){color:var(--brand)!important;background:#FCFCFF!important;}
.accordion-button::after{
  content:"\f054";font-family:"Font Awesome 6 Free";font-weight:900;
  background-image:none!important;font-size:13px;color:var(--brand);
  width:auto;height:auto;transition:transform .22s var(--ease);
  position:absolute;right:24px;
}
.accordion-button:not(.collapsed)::after{transform:rotate(90deg);}
.accordion-body{
  padding:4px 24px 22px;font-size:15px;line-height:1.85;color:var(--t2);
  background:#FCFCFF;
}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;background:var(--ink);color:#fff;overflow:hidden;
  border-radius:var(--r-lg);
  padding:64px 56px;
}
.cta-band::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(91,75,232,.42) 0%,rgba(18,194,180,0) 68%);
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center;}
.cta-band h2{color:#fff;font-size:32px;line-height:1.3;}
.cta-band p{color:rgba(255,255,255,.72);font-size:16px;margin:14px 0 0;max-width:520px;}
.inline-form{display:flex;gap:12px;background:rgba(255,255,255,.06);padding:12px;border-radius:18px;border:1px solid rgba(255,255,255,.14);}
.inline-form input{
  flex:1;height:48px;border-radius:12px;border:1px solid transparent;background:#fff;
  padding:0 16px;font-size:15px;color:var(--ink);outline:none;
}
.inline-form input:focus{border:2px solid var(--brand);}
.form-hint{font-size:13px;color:rgba(255,255,255,.55);margin-top:12px;}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:26px;bottom:26px;width:48px;height:48px;border-radius:50%;
  border:none;background:var(--grad);color:#fff;font-size:16px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-md);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s;
  z-index:1900;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{transform:translateY(-4px);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);margin-top:var(--sec);position:relative;}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad);}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px;
  padding:72px 0 48px;
}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);margin:18px 0 22px;max-width:320px;}
.footer-brand .logo-text{color:#fff;}
.footer-col h4{color:#fff;font-size:15px;font-weight:650;margin-bottom:18px;letter-spacing:.02em;}
.footer-col ul li{margin-bottom:12px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:#12C2B4;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 32px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- 响应式 ---------- */
@media (min-width:1400px){
  .container{max-width:1320px;}
}
@media (max-width:1199px){
  .hero-grid{gap:36px;}
  .page-hero h1{font-size:40px;}
  .h2{font-size:30px;}
  .check-grid{grid-template-columns:repeat(2,1fr);}
  .split{grid-template-columns:240px 1fr;gap:36px;}
}
@media (max-width:991px){
  .container{padding:0 24px;}
  .nav-desktop{display:none;}
  .nav-mobile-bar{display:grid;}
  .site-header{height:64px;}
  :root{--sec:64px;}
  .sec{padding:64px 0;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .page-hero h1{font-size:32px;}
  .hero-media{aspect-ratio:16/10;}
  .split{grid-template-columns:1fr;}
  .toc{position:static;}
  .ops-row{grid-template-columns:1fr;gap:10px;padding:24px;}
  .rel-grid{grid-template-columns:repeat(2,1fr);}
  .cta-inner{grid-template-columns:1fr;gap:28px;}
  .cta-band{padding:44px 28px;}
  .cta-band h2{font-size:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;padding:56px 0 36px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  body{font-size:16px;}
  .page-hero h1{font-size:29px;}
  .h2{font-size:24px;}
  .check-grid{grid-template-columns:1fr;}
  .rel-grid{grid-template-columns:1fr;}
  .step{grid-template-columns:44px 1fr;gap:16px;}
  .step-num{width:44px;height:44px;font-size:16px;}
  .step::before{left:21px;top:44px;}
  .step-body{padding:20px;}
  .inline-form{flex-direction:column;}
  .inline-form .btn-grad{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .to-top{right:16px;bottom:16px;}
  .page-hero{padding:8px 0 40px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --brand-primary:#5B4BE8;
  --brand-accent:#0FB5A6;
  --brand-warm:#FF7A45;
  --brand-grad:linear-gradient(135deg,#5B4BE8 0%,#12C2B4 100%);
  --bg-page:#F6F7FB;
  --bg-card:#FFFFFF;
  --bg-soft:#F1F2FA;
  --ink:#101425;
  --text-2:#4A5068;
  --text-3:#8A90A6;
  --line:#E6E8F2;
  --r-card:20px;
  --r-lg:28px;
  --r-btn:12px;
  --sh-sm:0 2px 8px rgba(16,20,37,.05);
  --sh-md:0 12px 32px rgba(16,20,37,.08);
  --sh-lg:0 24px 64px rgba(91,75,232,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.75;
  color:var(--text-2);
  background:var(--bg-page);
  font-variant-numeric:tabular-nums;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;}
p{margin:0 0 16px;}
ul{margin:0;padding:0;list-style:none;}
button,input{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand-primary);outline-offset:2px;border-radius:6px;}

.top-stripe{position:fixed;top:0;left:0;right:0;height:3px;background:var(--brand-grad);z-index:1040;}
.container{max-width:1200px;margin:0 auto;padding:0 32px;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:3px;z-index:1030;
  background:#fff;
  border-bottom:1px solid transparent;
  transition:box-shadow .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.site-header.scrolled{box-shadow:0 2px 14px rgba(16,20,37,.06);border-bottom-color:rgba(16,20,37,.06);}
.nav-desktop{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:76px;gap:18px;
}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-right{justify-content:flex-end;}
.nav-link-item{
  position:relative;font-size:15px;font-weight:500;color:var(--text-2);
  padding:6px 0;white-space:nowrap;
}
.nav-link-item::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--brand-grad);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link-item:hover{color:var(--brand-primary);}
.nav-link-item:hover::after,.nav-link-item.active::after{transform:scaleX(1);}
.nav-link-item.active{color:var(--brand-primary);font-weight:600;}
.logo{display:inline-flex;align-items:center;gap:10px;}
.logo-mark{
  width:26px;height:26px;border-radius:9px;background:var(--brand-grad);
  position:relative;flex:none;box-shadow:0 4px 12px rgba(91,75,232,.28);
}
.logo-mark::after{
  content:"";position:absolute;inset:8px;border-radius:4px;background:#fff;opacity:.9;
}
.logo-text{font-size:17.5px;font-weight:700;color:var(--ink);letter-spacing:-.01em;}

.btn-grad{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:0;border-radius:var(--r-btn);
  background-image:var(--brand-grad);background-size:180% 180%;background-position:0% 50%;
  color:#fff;font-size:15.5px;font-weight:600;cursor:pointer;
  transition:background-position .3s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-grad:hover{background-position:100% 50%;transform:scale(1.02);box-shadow:var(--sh-md);color:#fff;}
.btn-grad:active{transform:translateY(1px) scale(.99);}
.btn-nav{height:42px;padding:0 20px;font-size:15px;}

.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  background:#fff;border:1px solid var(--line);color:var(--ink);
  font-size:15.5px;font-weight:600;
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.btn-ghost:hover{border-color:var(--brand-primary);color:var(--brand-primary);}
.btn-ghost:active{transform:translateY(1px);}

.text-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15.5px;font-weight:600;color:var(--brand-primary);
}
.text-link i{transition:transform .2s var(--ease);}
.text-link:hover i{transform:translateX(3px);}

/* mobile bar */
.nav-mobile-bar{display:none;align-items:center;justify-content:space-between;height:64px;}
.nav-mobile-bar .left,.nav-mobile-bar .right{flex:1 1 0;display:flex;}
.nav-mobile-bar .right{justify-content:flex-end;}
.nav-mobile-bar .logo{justify-content:center;}
.nav-burger{
  width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
}
.nav-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);}
.btn-nav-sm{height:40px;padding:0 16px;font-size:14.5px;border-radius:11px;}

.offcanvas{max-width:86vw;}
.mobile-nav-list{display:flex;flex-direction:column;gap:4px;margin-top:8px;}
.mobile-nav-list a{
  display:flex;align-items:center;min-height:48px;padding:0 4px;
  font-size:16px;font-weight:500;color:var(--text-2);border-bottom:1px solid var(--line);
}
.mobile-nav-list a.active{color:var(--brand-primary);font-weight:600;}
.mobile-cta{margin-top:22px;width:100%;}
.offcanvas-header{border-bottom:1px solid var(--line);padding:16px 20px;}
.offcanvas-body{padding:12px 20px 28px;}
.btn-close:focus{box-shadow:none;}

/* ---------- Breadcrumb ---------- */
.breadcrumb-bar{padding:20px 0 0;font-size:14px;color:var(--text-3);}
.breadcrumb-bar .sep{margin:0 8px;color:#C9CDDE;}
.breadcrumb-bar .current{color:var(--ink);font-weight:500;}

/* ---------- Hero ---------- */
.cat-hero{padding:28px 0 72px;}
.cat-hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:48px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;color:var(--brand-accent);margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--brand-accent);}
.cat-hero h1{
  font-size:clamp(30px,3.4vw,46px);line-height:1.22;font-weight:800;letter-spacing:-.02em;
  margin-bottom:18px;
}
.cat-hero h1 em{
  font-style:normal;
  background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.cat-hero .lead{font-size:17px;line-height:1.8;max-width:34em;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-mini-stats{display:flex;flex-wrap:wrap;gap:12px;}
.mini-badge{
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:8px 16px;font-size:13.5px;color:var(--text-2);display:inline-flex;align-items:center;gap:8px;
}
.mini-badge i{color:var(--brand-accent);font-size:12px;}
.hero-visual{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  box-shadow:var(--sh-lg);aspect-ratio:16/10;background:var(--bg-soft);
}
.hero-visual img{width:100%;height:100%;object-fit:cover;}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(91,75,232,.16),rgba(18,194,180,.12));
}
.hero-float{
  position:absolute;z-index:2;background:#fff;border-radius:16px;padding:14px 18px;
  box-shadow:var(--sh-md);border:1px solid var(--line);
}
.hero-float.a{left:18px;bottom:18px;}
.hero-float.b{right:18px;top:18px;}
.hero-float .num{font-size:26px;font-weight:800;color:var(--brand-primary);line-height:1.2;}
.hero-float .num.warm{color:var(--brand-warm);}
.hero-float .txt{font-size:13px;color:var(--text-3);}

/* ---------- Sections ---------- */
.section{padding:88px 0;}
.section.tight{padding:72px 0;}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3;margin-bottom:14px;letter-spacing:-.01em;}
.section-head p{font-size:16.5px;margin:0;}
.section.alt{background:#fff;}
.section.soft{background:var(--bg-soft);}
.section.divider{border-top:1px solid var(--line);}

/* ---------- Spec table ---------- */
.spec-wrap{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-sm);overflow:hidden;
}
.spec-table{width:100%;border-collapse:collapse;font-size:15px;}
.spec-table thead th{
  background:linear-gradient(180deg,#F3F2FE,#EFEEFC);
  color:var(--ink);font-weight:650;font-size:14.5px;text-align:left;
  padding:16px 18px;white-space:nowrap;border-bottom:1px solid var(--line);
}
.spec-table tbody td{padding:18px;border-bottom:1px solid var(--line);color:var(--text-2);vertical-align:middle;}
.spec-table tbody tr:nth-child(even){background:#FAFAFE;}
.spec-table tbody tr:hover{background:#F4F3FE;}
.spec-table tbody tr:last-child td{border-bottom:0;}
.spec-name{font-weight:650;color:var(--ink);font-size:15.5px;}
.tag-pill{
  display:inline-block;padding:4px 12px;border-radius:999px;font-size:13px;
  background:#EEEDFD;color:var(--brand-primary);font-weight:600;
}
.tag-pill.warm{background:#FFF0EA;color:#E2602F;}
.spec-cards{display:none;}

/* ---------- Data badges ---------- */
.badge-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.data-badge{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.data-badge:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#DCD9FA;}
.data-badge .val{
  font-size:42px;font-weight:800;line-height:1.1;letter-spacing:-.02em;
  background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.data-badge .val.warm{background:none;color:var(--brand-warm);}
.data-badge .unit{font-size:16px;font-weight:700;color:var(--text-3);margin-left:4px;}
.data-badge .cap{font-size:13.5px;color:var(--text-3);margin-top:8px;line-height:1.6;}

/* ---------- Staggered gallery ---------- */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start;}
.gallery figure{margin:0;border-radius:24px;overflow:hidden;box-shadow:var(--sh-md);background:var(--bg-soft);position:relative;}
.gallery figure img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s var(--ease);}
.gallery figure:hover img{transform:scale(1.04);}
.gallery figure:nth-child(2){transform:translateY(34px);}
.gallery figure:nth-child(3){transform:translateY(-18px);}
.gallery figcaption{
  position:absolute;left:14px;right:14px;bottom:14px;
  background:rgba(255,255,255,.94);border-radius:14px;padding:10px 14px;
  font-size:13.5px;color:var(--text-2);box-shadow:var(--sh-sm);
}
.gallery figcaption strong{color:var(--ink);font-weight:650;}

/* ---------- Billing list ---------- */
.bill-list{display:flex;flex-direction:column;gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-sm);}
.bill-row{
  display:grid;grid-template-columns:64px 1fr auto;gap:22px;align-items:center;
  padding:26px 28px;border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.bill-row:last-child{border-bottom:0;}
.bill-row:hover{background:#F6F5FE;}
.bill-num{
  width:46px;height:46px;border-radius:999px;display:flex;align-items:center;justify-content:center;
  background:var(--brand-grad);color:#fff;font-weight:700;font-size:16px;flex:none;
  box-shadow:0 8px 18px rgba(91,75,232,.22);
}
.bill-row h3{font-size:19px;font-weight:650;margin-bottom:6px;}
.bill-row p{margin:0;font-size:15px;}
.bill-meta{font-size:13.5px;color:var(--brand-accent);font-weight:600;white-space:nowrap;}
.bill-row i.arrow{color:var(--text-3);}

/* ---------- Article entries ---------- */
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.entry-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#DCD9FA;}
.entry-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-soft);}
.entry-thumb img{width:100%;height:100%;object-fit:cover;}
.entry-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.entry-body h3{font-size:18.5px;line-height:1.45;font-weight:650;}
.entry-body p{font-size:14.5px;line-height:1.7;margin:0;color:var(--text-2);}
.entry-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13.5px;color:var(--text-3);}
.entry-foot .go{color:var(--brand-primary);font-weight:600;}

/* ---------- FAQ ---------- */
.faq .accordion-item{
  border:1px solid var(--line);border-radius:16px;background:#fff;
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-sm);
}
.faq .accordion-button{
  position:relative;width:100%;padding:20px 22px 20px 26px;
  font-size:16.5px;font-weight:500;color:var(--ink);background:#fff;
  box-shadow:none;border:0;text-align:left;
}
.faq .accordion-button:not(.collapsed){color:var(--ink);background:#fff;}
.faq .accordion-button::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:var(--brand-grad);opacity:0;transition:opacity .2s var(--ease);
}
.faq .accordion-button:not(.collapsed)::before{opacity:1;}
.faq .accordion-button::after{
  flex:none;width:9px;height:9px;margin-left:auto;
  background-image:none;content:"";
  border-right:2px solid var(--brand-primary);border-bottom:2px solid var(--brand-primary);
  transform:rotate(45deg);transition:transform .22s var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{transform:rotate(135deg);}
.faq .accordion-body{padding:0 22px 22px 26px;font-size:15px;line-height:1.85;color:var(--text-2);}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;background:var(--ink);color:#fff;border-radius:var(--r-lg);
  padding:56px 56px;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(600px 300px at 88% 10%,rgba(91,75,232,.42),transparent 70%),
             radial-gradient(500px 260px at 6% 100%,rgba(18,194,180,.32),transparent 72%);
}
.cta-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;}
.cta-inner h2{color:#fff;font-size:clamp(24px,2.5vw,32px);line-height:1.32;margin-bottom:14px;}
.cta-inner p{color:rgba(255,255,255,.76);font-size:16px;margin:0;}
.cta-form-box{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:20px;padding:26px;
}
.cta-form-box label{display:block;font-size:13.5px;color:rgba(255,255,255,.72);margin-bottom:10px;}
.cta-inline{display:flex;gap:12px;}
.cta-inline input{
  flex:1;height:50px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.08);color:#fff;padding:0 16px;font-size:15.5px;
}
.cta-inline input::placeholder{color:rgba(255,255,255,.5);}
.cta-inline input:focus{outline:2px solid var(--brand-accent);outline-offset:2px;background:rgba(255,255,255,.14);}
.cta-note{font-size:13px;color:rgba(255,255,255,.55);margin-top:12px;}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);margin-top:96px;position:relative;}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--brand-grad);}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding:72px 0 48px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand .logo-text{color:#fff;}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.68);max-width:30em;margin-bottom:20px;}
.footer-brand .btn-ghost{background:transparent;border-color:rgba(255,255,255,.24);color:#fff;}
.footer-brand .btn-ghost:hover{border-color:var(--brand-accent);color:var(--brand-accent);}
.footer-col h4{color:#fff;font-size:15.5px;font-weight:650;margin-bottom:18px;}
.footer-col li{margin-bottom:12px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:var(--brand-accent);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:22px 0 28px;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- Back to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:999px;
  border:0;background-image:var(--brand-grad);color:#fff;font-size:16px;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:var(--sh-md);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  z-index:1020;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{transform:translateY(-3px);}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .container{padding:0 24px;}
  .cat-hero-grid{gap:36px;}
  .badge-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
  .nav-desktop{display:none;}
  .nav-mobile-bar{display:flex;}
  .cat-hero-grid{grid-template-columns:1fr;}
  .hero-visual{order:-1;aspect-ratio:16/9;}
  .section{padding:64px 0;}
  .section.tight{padding:56px 0;}
  .gallery{grid-template-columns:1fr 1fr;}
  .gallery figure:nth-child(2){transform:none;}
  .gallery figure:nth-child(3){transform:none;grid-column:span 2;}
  .entry-grid{grid-template-columns:1fr 1fr;}
  .cta-band{padding:40px 32px;}
  .cta-inner{grid-template-columns:1fr;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 36px;}
}
@media (max-width:767.98px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .cat-hero{padding:20px 0 48px;}
  .cat-hero .lead{font-size:16px;}
  .hero-actions{gap:10px;}
  .hero-actions .btn-grad,.hero-actions .btn-ghost{width:100%;}
  .spec-wrap{display:none;}
  .spec-cards{display:grid;gap:16px;}
  .spec-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:22px;box-shadow:var(--sh-sm);
  }
  .spec-card h3{font-size:18px;margin-bottom:6px;}
  .spec-card .sub{font-size:13.5px;color:var(--text-3);margin-bottom:14px;}
  .spec-kv{display:grid;grid-template-columns:auto 1fr;gap:8px 14px;font-size:14.5px;margin-bottom:14px;}
  .spec-kv dt{color:var(--text-3);}
  .spec-kv dd{margin:0;color:var(--ink);font-weight:600;}
  .badge-grid{grid-template-columns:1fr 1fr;gap:16px;}
  .data-badge{padding:20px 18px;}
  .data-badge .val{font-size:32px;}
  .gallery{grid-template-columns:1fr;}
  .gallery figure:nth-child(3){grid-column:auto;}
  .entry-grid{grid-template-columns:1fr;}
  .bill-row{grid-template-columns:46px 1fr;gap:16px;padding:22px 20px;}
  .bill-meta{grid-column:2;white-space:normal;}
  .cta-band{padding:32px 22px;border-radius:22px;}
  .cta-inline{flex-direction:column;}
  .cta-inline .btn-grad{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .to-top{right:16px;bottom:16px;}
  .hero-float{padding:10px 14px;}
  .hero-float .num{font-size:20px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.01ms!important;}
  html{scroll-behavior:auto;}
  .data-badge:hover,.entry-card:hover,.to-top:hover,.btn-grad:hover{transform:none;}
}

/* roulang page: category3 */
:root{
  --brand-primary:#5B4BE8;
  --brand-accent:#0FB5A6;
  --brand-warm:#FF7A45;
  --brand-grad:linear-gradient(135deg,#5B4BE8 0%,#12C2B4 100%);
  --brand-soft:#EFEDFE;
  --bg-page:#F6F7FB;
  --bg-card:#FFFFFF;
  --ink:#101425;
  --line:#E6E8F2;
  --text-2:#4A5068;
  --text-3:#8A90A6;
  --r-btn:12px;
  --r-card:20px;
  --r-lg:28px;
  --r-pill:999px;
  --sh-sm:0 2px 8px rgba(16,20,37,.05);
  --sh-md:0 12px 32px rgba(16,20,37,.08);
  --sh-lg:0 24px 64px rgba(91,75,232,.14);
  --ease:cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text-2);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;top:0;left:0;right:0;height:3px;
  background:var(--brand-grad);z-index:1035;pointer-events:none;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
button,input{font:inherit;}
button{cursor:pointer;}
ul{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{color:var(--ink);margin:0;}
p{margin:0 0 16px;}
:focus-visible{outline:2px solid var(--brand-primary);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:3px;z-index:1030;
  background:var(--bg-page);
  border-bottom:1px solid transparent;
  transition:background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.site-header.is-scrolled{
  background:#fff;
  border-bottom-color:rgba(16,20,37,.06);
  box-shadow:var(--sh-sm);
}
.nav-desktop{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  height:76px;
}
.nav-side{display:flex;align-items:center;gap:28px;}
.nav-right{justify-content:flex-end;}
.nav-link-item{
  position:relative;
  display:inline-flex;align-items:center;
  height:44px;font-size:15px;font-weight:500;color:var(--text-2);
}
.nav-link-item::after{
  content:"";position:absolute;left:0;right:0;bottom:8px;height:2px;border-radius:2px;
  background:var(--brand-grad);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.nav-link-item:hover{color:var(--brand-primary);}
.nav-link-item:hover::after{transform:scaleX(1);}
.nav-link-item.active{color:var(--brand-primary);font-weight:600;}
.nav-link-item.active::after{transform:scaleX(1);}

.logo{display:inline-flex;align-items:center;gap:10px;justify-self:center;}
.logo-mark{
  width:26px;height:26px;border-radius:9px;background:var(--brand-grad);
  position:relative;box-shadow:0 6px 16px rgba(91,75,232,.28);flex:0 0 auto;
}
.logo-mark::after{content:"";position:absolute;inset:8px;border-radius:3px;background:#fff;opacity:.9;}
.logo-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;}

.btn-grad{
  position:relative;display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 24px;border:0;border-radius:var(--r-btn);
  color:#fff;font-size:15px;font-weight:600;
  background-image:var(--brand-grad);background-size:180% 180%;background-position:0% 50%;
  transition:background-position .3s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-grad:hover{background-position:100% 50%;box-shadow:var(--sh-md);transform:scale(1.02);color:#fff;}
.btn-grad:active{transform:translateY(1px) scale(1);}
.btn-nav{height:42px;padding:0 18px;font-size:14px;}
.btn-nav-sm{height:40px;padding:0 16px;font-size:14px;}

.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  background:#fff;border:1px solid var(--line);color:var(--ink);
  font-size:15px;font-weight:600;
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-ghost:hover{border-color:var(--brand-primary);color:var(--brand-primary);box-shadow:var(--sh-sm);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:44px;padding:0 20px;font-size:14px;}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand-primary);
}
.link-arrow .arw{transition:transform .2s var(--ease);}
.link-arrow:hover .arw{transform:translateX(3px);}

/* ---------- 移动端导航 ---------- */
.nav-mobile-bar{display:none;grid-template-columns:1fr auto 1fr;align-items:center;height:64px;}
.nav-mobile-bar .left{display:flex;justify-content:flex-start;}
.nav-mobile-bar .right{display:flex;justify-content:flex-end;}
.nav-burger{
  width:44px;height:44px;display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  padding:0 11px;background:#fff;border:1px solid var(--line);border-radius:var(--r-btn);
  transition:border-color .18s var(--ease);
}
.nav-burger:hover{border-color:var(--brand-primary);}
.nav-burger span{display:block;height:2px;border-radius:2px;background:var(--ink);}

.mobile-nav{width:min(86vw,360px);background:#fff;}
.mobile-nav .offcanvas-header{
  border-bottom:1px solid var(--line);padding:18px 22px;
  display:flex;align-items:center;justify-content:space-between;
}
.mobile-nav .offcanvas-body{padding:18px 22px 28px;display:flex;flex-direction:column;gap:20px;}
.mobile-nav-list li + li{border-top:1px solid var(--line);}
.mobile-nav-list a{
  display:flex;align-items:center;min-height:52px;
  font-size:16px;font-weight:500;color:var(--text-2);
}
.mobile-nav-list a:hover,.mobile-nav-list a.active{color:var(--brand-primary);}

/* ---------- Hero ---------- */
.page-hero{padding:52px 0 60px;}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--text-3);margin:0 0 18px;
}
.crumb a:hover{color:var(--brand-primary);}
.crumb .sep{opacity:.55;}
.crumb .cur{color:var(--ink);}
.hero-pill{
  display:inline-flex;align-items:center;gap:8px;
  height:34px;padding:0 14px;border-radius:var(--r-pill);
  background:var(--brand-soft);border:1px solid #E1DDFB;
  font-size:13px;font-weight:600;color:var(--brand-primary);margin-bottom:18px;
}
.hero-pill i{width:6px;height:6px;border-radius:50%;background:var(--brand-accent);display:inline-block;}
.page-hero h1{
  font-size:clamp(30px,4.4vw,50px);line-height:1.2;font-weight:800;
  letter-spacing:-.02em;color:var(--ink);margin:0 0 18px;
}
.page-hero .lead{font-size:17px;line-height:1.8;max-width:34em;margin:0 0 28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-visual{position:relative;}
.hero-visual img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-lg);box-shadow:var(--sh-md);
}
.hero-visual::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-lg);pointer-events:none;
  background:linear-gradient(135deg,rgba(91,75,232,.16) 0%,rgba(18,194,180,.10) 100%);
}
.hero-float{
  position:absolute;left:20px;bottom:20px;z-index:2;
  background:#fff;border-radius:var(--r-pill);box-shadow:var(--sh-sm);
  padding:10px 18px;display:inline-flex;align-items:baseline;gap:6px;
}
.hero-float .n{font-size:20px;font-weight:800;color:var(--brand-warm);font-variant-numeric:tabular-nums;}
.hero-float .u{font-size:13px;color:var(--text-3);}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0;}
.section-alt{background:#fff;}
.section-head{max-width:760px;margin-bottom:40px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:14px;font-weight:600;color:var(--brand-accent);
  letter-spacing:.04em;margin-bottom:14px;
}
.eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--brand-grad);}
.sec-title{
  font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:700;
  letter-spacing:-.01em;color:var(--ink);margin:0 0 14px;
}
.sec-lead{font-size:16.5px;margin:0;max-width:44em;}

/* ---------- 标签胶囊 ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:12px;margin:0 0 36px;}
.tag-pill{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;
  border-radius:var(--r-pill);font-size:14px;font-weight:500;
  color:var(--brand-primary);background:#EFEDFE;border:1px solid #E1DDFB;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.tag-pill:hover{transform:translateY(-2px);box-shadow:var(--sh-sm);}

/* ---------- Bento 场景网格 ---------- */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.b-card{
  position:relative;display:flex;flex-direction:column;
  background:var(--bg-card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.b-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#D9D5F8;}
.b-card h3{font-size:20px;font-weight:650;line-height:1.4;color:var(--ink);margin:0 0 10px;}
.b-card p{font-size:15px;margin:0 0 18px;}
.b-span-8{grid-column:span 8;}
.b-span-4{grid-column:span 4;}
.b-feature{flex-direction:row;gap:28px;align-items:center;padding:28px;}
.b-feature .b-media{flex:0 0 46%;}
.b-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:16px;}
.b-media.ratio-wide img{aspect-ratio:16/9;}
.b-tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--brand-soft);color:var(--brand-primary);
  font-size:12.5px;font-weight:600;margin-bottom:12px;align-self:flex-start;
}

.stat-badge{
  display:inline-flex;align-items:baseline;gap:6px;align-self:flex-start;margin-top:auto;
  background:#F6F7FB;border:1px solid var(--line);border-radius:var(--r-pill);
  padding:8px 16px;
}
.stat-badge .num{
  font-size:20px;font-weight:800;font-variant-numeric:tabular-nums;
  background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat-badge .unit{font-size:13px;color:var(--text-3);}

/* ---------- 数据条 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.metric{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 24px;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.metric:hover{transform:translateY(-4px);box-shadow:var(--sh-md);}
.metric .num{
  display:block;font-size:clamp(34px,4vw,48px);line-height:1.1;font-weight:800;
  font-variant-numeric:tabular-nums;
  background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric .num em{font-style:normal;font-size:16px;font-weight:600;margin-left:4px;color:var(--text-3);}
.metric .cap{margin:10px 0 0;font-size:14px;color:var(--text-3);}

/* ---------- 内容卡 ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#D9D5F8;}
.news-card .cover{position:relative;}
.news-card .cover img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.news-body h3{font-size:18px;font-weight:650;line-height:1.5;margin:10px 0 10px;}
.news-body .desc{font-size:14.5px;color:var(--text-2);margin:0 0 18px;}
.news-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--text-3);padding-top:14px;border-top:1px solid var(--line);
}
.news-foot .go{color:var(--brand-primary);font-weight:600;}

/* ---------- FAQ ---------- */
.faq-list{max-width:900px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-sm);
}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:transparent;border:0;text-align:left;
  font-size:17px;font-weight:500;color:var(--ink);
}
.faq-q::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;
  background:var(--brand-grad);opacity:0;transition:opacity .2s var(--ease);
}
.faq-q[aria-expanded="true"]::before{opacity:1;}
.faq-ico{
  flex:0 0 auto;width:22px;height:22px;border-radius:6px;border:1px solid var(--line);
  position:relative;transition:transform .22s var(--ease),border-color .22s var(--ease);
}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;background:var(--text-2);border-radius:2px;}
.faq-ico::before{left:6px;right:6px;top:9.5px;height:2px;}
.faq-ico::after{top:6px;bottom:6px;left:9.5px;width:2px;transition:opacity .22s var(--ease);}
.faq-q[aria-expanded="true"] .faq-ico{transform:rotate(90deg);border-color:var(--brand-primary);}
.faq-q[aria-expanded="true"] .faq-ico::after{opacity:0;}
.faq-a{padding:0 22px 22px 22px;font-size:15px;line-height:1.85;color:var(--text-2);}

/* ---------- CTA ---------- */
.cta-wrap{padding:0 0 88px;}
.cta-band{
  position:relative;overflow:hidden;background:var(--ink);
  border-radius:var(--r-lg);padding:56px;box-shadow:var(--sh-lg);
}
.cta-band::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--brand-grad);
}
.cta-band::after{
  content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(91,75,232,.45) 0%,rgba(91,75,232,0) 70%);
}
.cta-band h2{
  position:relative;z-index:1;color:#fff;font-size:clamp(24px,3vw,32px);
  font-weight:700;letter-spacing:-.01em;margin:0 0 12px;
}
.cta-band p{position:relative;z-index:1;color:rgba(255,255,255,.72);font-size:16px;margin:0 0 28px;max-width:44em;}
.inline-form{position:relative;z-index:1;display:flex;gap:12px;max-width:640px;}
.inline-form input{
  flex:1;height:48px;border-radius:var(--r-btn);padding:0 16px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);color:#fff;
  transition:border-color .18s var(--ease),background .18s var(--ease);
}
.inline-form input::placeholder{color:rgba(255,255,255,.5);}
.inline-form input:focus{outline:none;border-color:var(--brand-accent);background:rgba(255,255,255,.13);}
.form-note{position:relative;z-index:1;font-size:13px;color:rgba(255,255,255,.55);margin:14px 0 0;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);position:relative;}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--brand-grad);}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;
  padding:64px 0 40px;
}
.footer-brand .logo{margin-bottom:16px;justify-self:start;}
.footer-brand .logo-text{color:#fff;}
.footer-brand p{font-size:14px;color:rgba(255,255,255,.68);margin:0 0 20px;max-width:30em;}
.footer-col h4{font-size:15px;font-weight:600;color:#fff;margin:0 0 16px;}
.footer-col li + li{margin-top:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);}
.footer-col a:hover{color:var(--brand-accent);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.6);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  border:0;background:var(--brand-grad);color:#fff;font-size:18px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-md);z-index:1000;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s;
}
.to-top.show{opacity:1;visibility:visible;transform:none;}
.to-top:hover{transform:translateY(-3px);}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .container{padding:0 28px;}
  .nav-side{gap:22px;}
  .hero-inner{gap:36px;}
}

@media (max-width:991.98px){
  .container{padding:0 24px;}
  .nav-desktop{display:none;}
  .nav-mobile-bar{display:grid;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .page-hero{padding:36px 0 44px;}
  .hero-inner{grid-template-columns:1fr;gap:32px;}
  .hero-visual{max-width:640px;}
  .section{padding:64px 0;}
  .b-span-8{grid-column:span 12;}
  .b-span-4{grid-column:span 6;}
  .b-feature{flex-direction:column;align-items:stretch;}
  .b-feature .b-media{flex:1 1 auto;}
  .metrics{grid-template-columns:repeat(2,1fr);}
  .news-grid{grid-template-columns:1fr 1fr;}
  .cta-band{padding:40px 32px;}
  .cta-wrap{padding-bottom:64px;}
}

@media (max-width:767.98px){
  .container{padding:0 16px;}
  .b-span-8,.b-span-4{grid-column:span 12;}
  .news-grid{grid-template-columns:1fr;}
  .section{padding:56px 0;}
  .page-hero{padding:28px 0 36px;}
  .page-hero h1{font-size:clamp(28px,7.4vw,34px);}
  .page-hero .lead{font-size:16px;}
  .hero-actions .btn-grad,.hero-actions .btn-ghost{width:100%;}
  .metrics{gap:16px;}
  .metric{padding:22px 18px;}
  .cta-band{padding:32px 20px;border-radius:20px;}
  .inline-form{flex-direction:column;}
  .inline-form .btn-grad{width:100%;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 28px;}
  .footer-brand{grid-column:1 / -1;}
  .footer-brand .btn-ghost{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .to-top{right:16px;bottom:16px;}
  .faq-q{font-size:16px;padding:16px 18px;}
  .faq-a{padding:0 18px 18px 18px;}
}

@media (max-width:520px){
  .nav-mobile-bar{height:60px;}
  .logo-text{font-size:16px;}
  .metrics{grid-template-columns:1fr 1fr;gap:12px;}
  .metric .num{font-size:32px;}
  .metric .cap{font-size:13px;}
  .footer-grid{grid-template-columns:1fr;}
  .hero-float{left:12px;bottom:12px;padding:8px 14px;}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .b-card:hover,.news-card:hover,.metric:hover,.to-top:hover{transform:none;}
}

/* roulang page: category4 */
:root{
  --brand:#5B4BE8;
  --accent:#0FB5A6;
  --warm:#FF7A45;
  --grad:linear-gradient(135deg,#5B4BE8 0%,#12C2B4 100%);
  --grad-soft:linear-gradient(135deg,#EEECFF 0%,#E1F6F3 100%);
  --bg:#F6F7FB;
  --card:#FFFFFF;
  --ink:#101425;
  --t2:#4A5068;
  --t3:#8A90A6;
  --line:#E6E8F2;
  --sh-sm:0 2px 8px rgba(16,20,37,.05);
  --sh-md:0 12px 32px rgba(16,20,37,.08);
  --sh-lg:0 24px 64px rgba(91,75,232,.14);
  --r-card:20px;
  --r-lg:28px;
  --r-btn:12px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--t2);
  font-family:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;top:0;left:0;right:0;height:3px;
  background:var(--grad);
  z-index:1200;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 12px;}
ul{margin:0;padding:0;list-style:none;}
button,input,select,textarea{font-family:inherit;font-size:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;
}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:var(--bg);
  border-bottom:1px solid transparent;
  transition:background .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{
  background:#fff;
  border-bottom-color:rgba(16,20,37,.06);
  box-shadow:var(--sh-sm);
}
.nav-desktop{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  height:76px;
  gap:16px;
}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-left{justify-content:flex-start;}
.nav-right{justify-content:flex-end;gap:22px;}
.nav-link-item{
  position:relative;
  font-size:15px;font-weight:500;color:var(--t2);
  padding:6px 0;
  white-space:nowrap;
  min-height:44px;display:inline-flex;align-items:center;
}
.nav-link-item::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:2px;
  background:var(--grad);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-link-item:hover{color:var(--brand);}
.nav-link-item:hover::after{transform:scaleX(1);}
.nav-link-item.active{color:var(--ink);font-weight:650;}
.nav-link-item.active::after{transform:scaleX(1);}
.logo{display:inline-flex;align-items:center;gap:10px;justify-self:center;}
.logo-mark{
  width:26px;height:26px;border-radius:8px;background:var(--grad);
  position:relative;display:inline-block;flex:none;
  box-shadow:0 4px 12px rgba(91,75,232,.28);
}
.logo-mark::after{
  content:"";position:absolute;inset:7px;border-radius:50%;background:#fff;opacity:.92;
}
.logo-text{font-size:17px;font-weight:700;color:var(--ink);letter-spacing:-.01em;white-space:nowrap;}

.btn-grad{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:0;border-radius:var(--r-btn);
  background-image:var(--grad);background-size:200% 100%;background-position:0 0;
  color:#fff;font-size:15px;font-weight:600;cursor:pointer;
  transition:background-position .25s var(--ease),transform .18s var(--ease),box-shadow .2s var(--ease);
}
.btn-grad:hover,.btn-grad:focus{color:#fff;background-position:100% 0;transform:scale(1.02);box-shadow:var(--sh-md);}
.btn-grad:active{transform:translateY(1px) scale(.99);}
.btn-nav{height:42px;padding:0 20px;font-size:14.5px;}
.btn-nav-sm{height:40px;padding:0 16px;font-size:14px;border-radius:10px;}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  background:#fff;border:1px solid var(--line);color:var(--ink);
  font-size:15px;font-weight:600;cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease),box-shadow .2s var(--ease),transform .18s var(--ease);
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);box-shadow:var(--sh-sm);transform:translateY(-1px);}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand);min-height:44px;
}
.link-arrow i{transition:transform .2s var(--ease);}
.link-arrow:hover i{transform:translateX(3px);}

/* 移动端导航条 */
.nav-mobile-bar{
  display:none;
  align-items:center;justify-content:space-between;
  height:64px;gap:12px;
}
.nav-mobile-bar .left,.nav-mobile-bar .right{flex:1 1 0;display:flex;align-items:center;}
.nav-mobile-bar .right{justify-content:flex-end;}
.nav-burger{
  width:44px;height:44px;border:1px solid var(--line);border-radius:12px;background:#fff;
  display:inline-flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;
  cursor:pointer;
}
.nav-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);}
.mobile-nav{width:320px !important;background:#fff;}
.mobile-nav .offcanvas-header{border-bottom:1px solid var(--line);padding:18px 22px;}
.mobile-nav .offcanvas-title{font-size:17px;font-weight:700;color:var(--ink);}
.mobile-nav .offcanvas-body{padding:18px 22px 28px;display:flex;flex-direction:column;}
.mobile-nav ul{display:grid;gap:4px;margin-bottom:20px;}
.mobile-nav ul a{
  display:block;font-size:16px;line-height:1.9;padding:10px 0;color:var(--t2);
  border-bottom:1px solid var(--line);min-height:44px;
}
.mobile-nav ul a:hover{color:var(--brand);}
.mobile-nav ul a.active{color:var(--brand);font-weight:650;}
.mobile-nav .btn-grad{width:100%;}

/* ============ 通用区块 ============ */
main{padding-top:8px;}
.section{padding:88px 0;}
.section-tight{padding:56px 0;}
.section-alt{background:#fff;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:14px;font-weight:600;color:var(--accent);letter-spacing:.02em;
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--grad);}
.eyebrow.warm{color:var(--warm);}
.section-title{font-size:34px;line-height:1.3;font-weight:700;margin-bottom:14px;}
.section-intro{font-size:16.5px;line-height:1.8;color:var(--t2);max-width:720px;margin:0;}
.divider-line{height:1px;background:var(--line);border:0;margin:0;}

/* ============ 面包屑 ============ */
.breadcrumb-bar{padding:20px 0 0;}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--t3);}
.breadcrumb-list a{color:var(--t3);}
.breadcrumb-list a:hover{color:var(--brand);}
.breadcrumb-list .sep{color:#C3C7D8;}
.breadcrumb-list .current{color:var(--ink);font-weight:600;}

/* ============ 小 Hero ============ */
.page-hero{padding:22px 0 64px;}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:40px;
  align-items:center;
}
.page-hero h1{
  font-size:46px;
  line-height:1.2;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:18px;
}
.page-hero .lead{
  font-size:17px;line-height:1.8;color:var(--t2);
  max-width:560px;margin-bottom:26px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-media{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  height:310px;
  background:var(--grad-soft);
  box-shadow:var(--sh-md);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(91,75,232,.16),rgba(18,194,180,.12));
}
.hero-media .float-badge{
  position:absolute;right:18px;bottom:18px;z-index:2;
  background:#fff;border-radius:999px;padding:10px 18px;box-shadow:var(--sh-md);
  display:flex;align-items:center;gap:10px;
}
.hero-media .float-badge .num{
  font-size:22px;font-weight:800;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-media .float-badge .txt{font-size:13px;color:var(--t3);}

/* 数据徽章 */
.stat-row{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;margin-top:40px;
}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px 22px;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--sh-md);}
.stat .num{
  font-size:34px;font-weight:800;line-height:1.1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
  display:flex;align-items:baseline;gap:4px;
}
.stat .num .unit{font-size:15px;font-weight:700;}
.stat.warm .num{background:none;color:var(--warm);}
.stat .desc{font-size:13.5px;color:var(--t3);line-height:1.6;margin-top:8px;}

/* ============ 时间轴 ============ */
.timeline{position:relative;margin-top:48px;max-width:880px;}
.tl-item{
  position:relative;
  display:grid;grid-template-columns:56px minmax(0,1fr);
  gap:24px;padding-bottom:28px;
}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:27px;top:60px;bottom:-4px;width:2px;
  background:linear-gradient(180deg,rgba(91,75,232,.35),rgba(18,194,180,.18));
}
.tl-item:last-child::before{display:none;}
.tl-num{
  position:relative;z-index:1;
  width:56px;height:56px;border-radius:50%;
  background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:800;color:var(--brand);
  box-shadow:var(--sh-sm);
}
.tl-body{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 26px;box-shadow:var(--sh-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.tl-body:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#D9D6F7;}
.tl-body h3{font-size:20px;font-weight:650;margin-bottom:8px;}
.tl-body p{margin:0;font-size:15.5px;line-height:1.8;color:var(--t2);}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.pill{
  display:inline-flex;align-items:center;
  padding:5px 14px;border-radius:999px;
  font-size:13.5px;font-weight:600;
  background:#EEECFF;color:var(--brand);
}
.pill.teal{background:#E1F6F3;color:#0B8E83;}
.pill.warm{background:#FFF0E9;color:#D95F2B;}

/* ============ 支持范围 + 联系卡 ============ */
.support-layout{
  display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:36px;align-items:start;margin-top:44px;
}
.svc-list{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-sm);overflow:hidden;}
.svc-item{
  display:grid;grid-template-columns:46px minmax(0,1fr) 20px;
  gap:16px;align-items:center;
  padding:22px 26px;
  border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.svc-item:last-child{border-bottom:0;}
.svc-item:hover{background:#FAFAFF;}
.svc-icon{
  width:46px;height:46px;border-radius:14px;
  background:var(--grad-soft);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);font-size:18px;
}
.svc-item h3{font-size:18px;font-weight:650;margin-bottom:4px;}
.svc-item p{margin:0;font-size:14.5px;color:var(--t2);line-height:1.7;}
.svc-item .arrow{color:#C3C7D8;font-size:14px;transition:transform .2s var(--ease),color .2s var(--ease);}
.svc-item:hover .arrow{transform:translateX(3px);color:var(--brand);}

.contact-card{
  position:sticky;top:104px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px;box-shadow:var(--sh-md);
}
.contact-card h3{font-size:21px;font-weight:700;margin-bottom:8px;}
.contact-card .sub{font-size:14.5px;color:var(--t3);margin-bottom:22px;line-height:1.7;}
.form-field{margin-bottom:16px;}
.form-field label{display:block;font-size:13.5px;font-weight:600;color:var(--t2);margin-bottom:8px;}
.form-field input,.form-field select,.form-field textarea{
  width:100%;padding:14px 16px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#FBFBFE;color:var(--ink);
  font-size:15px;line-height:1.5;
  transition:border-color .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease);
}
.form-field textarea{min-height:96px;resize:vertical;}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{
  border-color:var(--brand);background:#F6F5FF;box-shadow:0 0 0 3px rgba(91,75,232,.12);outline:none;
}
.contact-card .btn-grad{width:100%;}
.form-note{font-size:13px;color:var(--t3);margin:14px 0 0;line-height:1.7;}
.form-result{
  display:none;margin-top:14px;padding:12px 16px;border-radius:12px;
  background:#E1F6F3;color:#0B8E83;font-size:14px;font-weight:600;
}
.form-result.show{display:block;}
.contact-meta{
  margin-top:20px;padding-top:20px;border-top:1px solid var(--line);
  display:grid;gap:12px;
}
.contact-meta .row-item{display:flex;align-items:center;gap:12px;font-size:14.5px;color:var(--t2);}
.contact-meta i{color:var(--accent);width:20px;text-align:center;}

/* ============ 相关阅读 ============ */
.read-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:40px;}
.read-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-sm);
  display:flex;flex-direction:column;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.read-card:hover{transform:translateY(-4px);box-shadow:var(--sh-md);border-color:#D9D6F7;}
.read-card .thumb{aspect-ratio:16/9;background:var(--grad-soft);overflow:hidden;}
.read-card .thumb img{width:100%;height:100%;object-fit:cover;}
.read-card .body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1;}
.read-card h3{font-size:18px;font-weight:650;line-height:1.5;}
.read-card p{margin:0;font-size:14.5px;line-height:1.75;color:var(--t2);}
.read-card .foot{margin-top:auto;font-size:13.5px;color:var(--t3);display:flex;align-items:center;gap:8px;}

/* ============ FAQ ============ */
.faq-wrap{margin-top:40px;max-width:920px;}
.faq .accordion-item{
  background:#fff;border:1px solid var(--line);border-radius:16px;
  margin-bottom:12px;overflow:hidden;
}
.faq .accordion-item:last-child{margin-bottom:0;}
.faq .accordion-button{
  position:relative;
  background:#fff;color:var(--ink);
  font-size:16.5px;font-weight:500;line-height:1.6;
  padding:20px 24px 20px 26px;
  box-shadow:none;border:0;
}
.faq .accordion-button::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;
  border-radius:3px;background:var(--grad);opacity:0;
  transition:opacity .18s var(--ease);
}
.faq .accordion-button:not(.collapsed){color:var(--brand);background:#FBFBFF;}
.faq .accordion-button:not(.collapsed)::before{opacity:1;}
.faq .accordion-button:focus{box-shadow:none;outline:none;}
.faq .accordion-button:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.faq .accordion-button::after{
  content:"";background-image:none;
  width:9px;height:9px;margin-left:auto;flex:none;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(45deg);transform-origin:center;
  transition:transform .18s var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{transform:rotate(135deg);}
.faq .accordion-body{
  padding:4px 26px 22px;font-size:15px;line-height:1.85;color:var(--t2);
}

/* ============ 底部 CTA ============ */
.cta-band{
  background-image:var(--grad);
  border-radius:var(--r-lg);
  padding:56px;
  color:#fff;
  display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);
  gap:40px;align-items:center;
  box-shadow:var(--sh-lg);
}
.cta-band h2{color:#fff;font-size:32px;line-height:1.32;font-weight:750;margin-bottom:12px;}
.cta-band p{color:rgba(255,255,255,.88);font-size:16px;margin:0;max-width:520px;}
.cta-form{
  background:rgba(255,255,255,.14);
  border:1px solid rgba(255,255,255,.28);
  border-radius:var(--r-card);
  padding:22px;
}
.cta-form .label{font-size:13.5px;color:rgba(255,255,255,.9);margin-bottom:12px;display:block;}
.inline-form{display:flex;gap:12px;flex-wrap:wrap;}
.inline-form input{
  flex:1 1 220px;min-width:0;
  height:48px;padding:0 16px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.5);
  background:#fff;color:var(--ink);font-size:15px;
}
.inline-form input:focus{outline:none;border-color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.35);}
.inline-form .btn-light-grad{
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  background:#101425;color:#fff;border:0;font-weight:600;font-size:15px;
  cursor:pointer;transition:transform .18s var(--ease),box-shadow .2s var(--ease);
}
.inline-form .btn-light-grad:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(16,20,37,.28);}
.inline-note{font-size:12.5px;color:rgba(255,255,255,.82);margin:12px 0 0;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);margin-top:96px;}
.site-footer::before{content:"";display:block;height:3px;background:var(--grad);}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px;
  padding:64px 0 44px;
}
.footer-brand .logo-text{color:#fff;}
.footer-brand{display:flex;flex-direction:column;align-items:flex-start;}
.footer-brand .logo{justify-self:flex-start;}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.68);margin:18px 0 22px;max-width:290px;}
.site-footer .btn-ghost{
  background:transparent;border-color:rgba(255,255,255,.28);color:#fff;height:44px;
}
.site-footer .btn-ghost:hover{border-color:var(--accent);color:var(--accent);}
.footer-col h4{color:#fff;font-size:15px;font-weight:650;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);display:inline-block;padding:3px 0;}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 34px;
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.6);
}

/* ============ 返回顶部 ============ */
.back-to-top{
  position:fixed;right:24px;bottom:24px;z-index:1000;
  width:48px;height:48px;border-radius:50%;border:0;
  background-image:var(--grad);color:#fff;font-size:17px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-md);cursor:pointer;
  opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .25s var(--ease),transform .25s var(--ease);
}
.back-to-top.show{opacity:1;pointer-events:auto;transform:translateY(0);}
.back-to-top:hover{transform:translateY(-3px);}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .page-hero h1{font-size:40px;}
  .section{padding:76px 0;}
}
@media (max-width:991px){
  .nav-desktop{display:none;}
  .nav-mobile-bar{display:flex;}
  .container{padding:0 24px;}
  .page-hero{padding:12px 0 48px;}
  .page-hero h1{font-size:33px;}
  .hero-grid{grid-template-columns:1fr;gap:28px;}
  .hero-media{height:240px;}
  .stat-row{grid-template-columns:repeat(2,minmax(0,1fr));}
  .support-layout{grid-template-columns:1fr;}
  .contact-card{position:static;}
  .read-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-band{grid-template-columns:1fr;padding:40px 32px;}
  .cta-band h2{font-size:26px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;padding:52px 0 36px;}
  .section{padding:64px 0;}
  .section-title{font-size:26px;}
}
@media (max-width:575px){
  .container{padding:0 16px;}
  .page-hero h1{font-size:30px;letter-spacing:-.01em;}
  .page-hero .lead{font-size:15.5px;}
  .hero-actions .btn-grad,.hero-actions .btn-ghost{width:100%;}
  .stat-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;}
  .stat{padding:16px 18px;}
  .stat .num{font-size:26px;}
  .tl-item{grid-template-columns:44px minmax(0,1fr);gap:16px;}
  .tl-num{width:44px;height:44px;font-size:16px;}
  .tl-item::before{left:21px;top:48px;}
  .tl-body{padding:18px 18px 20px;}
  .tl-body h3{font-size:17.5px;}
  .svc-item{grid-template-columns:40px minmax(0,1fr);padding:18px;}
  .svc-item .arrow{display:none;}
  .svc-icon{width:40px;height:40px;border-radius:12px;font-size:16px;}
  .read-grid{grid-template-columns:1fr;}
  .cta-band{padding:30px 20px;border-radius:var(--r-card);}
  .contact-card{padding:22px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .back-to-top{right:16px;bottom:16px;}
  .faq .accordion-button{font-size:15.5px;padding:17px 18px 17px 20px;}
  .faq .accordion-body{padding:2px 20px 18px;font-size:14.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
}