/* roulang page: index */
:root{
  --brand:#6D3BF5;
  --brand-2:#A83BF0;
  --brand-soft:#F3F0FF;
  --accent:#0FCDB8;
  --accent-soft:#E8FBF8;
  --accent-deep:#0B9D8C;
  --hot:#FF6A2B;
  --hot-soft:#FFF1E8;
  --bg:#F7F6FB;
  --card:#FFFFFF;
  --ink:#14122A;
  --ink2:#5A5772;
  --ink3:#8B88A3;
  --body:#3A3750;
  --line:#ECE9F8;
  --grad:linear-gradient(120deg,#6D3BF5 0%,#A83BF0 48%,#FF5F7E 100%);
  --r-xl:32px;
  --r-lg:28px;
  --r-md:20px;
  --r-sm:16px;
  --sh1:0 1px 2px rgba(20,18,42,.04),0 10px 26px -14px rgba(109,59,245,.20);
  --sh2:0 22px 44px -18px rgba(109,59,245,.38);
  --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:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  background:var(--bg);
  color:var(--body);
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .22s var(--ease)}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800;letter-spacing:-.01em}
h1{font-size:clamp(30px,4.4vw,52px);line-height:1.15;letter-spacing:-.02em}
h2{font-size:clamp(24px,2.8vw,34px);line-height:1.25}
h3{font-size:21px;line-height:1.45}
h4{font-size:17px;line-height:1.5}
p{margin:0}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(109,59,245,.35);border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:1024px){.container{padding:0 32px}}
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:96px 0}}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;gap:16px;margin-bottom:36px}
.sec-head>div{flex:1 1 320px;min-width:0}
.sec-desc{margin-top:10px;font-size:15px;line-height:1.85;color:var(--ink2);max-width:620px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  color:var(--brand);font-size:13px;font-weight:600;letter-spacing:.02em;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--grad);display:block}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:15px;font-weight:600;min-height:44px}
.text-link svg{transition:transform .22s var(--ease)}
.text-link:hover svg{transform:translateX(4px)}
.text-link:hover{color:var(--brand-2)}

/* ============ 按钮 ============ */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:999px;
  background:var(--grad);color:#fff;font-weight:700;font-size:15px;
  box-shadow:0 12px 26px -14px rgba(109,59,245,.62);
  transition:transform .22s var(--ease),filter .22s var(--ease),box-shadow .22s var(--ease);
  white-space:nowrap;
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 20px 38px -16px rgba(109,59,245,.72);color:#fff}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:14px;
  background:#fff;border:1.5px solid #E4E0F5;color:var(--brand);
  font-weight:600;font-size:15px;
  transition:border-color .22s var(--ease),background .22s var(--ease),transform .22s var(--ease);
  white-space:nowrap;
}
.btn-ghost:hover{border-color:var(--brand);background:var(--brand-soft);color:var(--brand);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(0)}
.btn-lg{height:52px;padding:0 30px;font-size:16px}

/* ============ 头部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,251,.85);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 12px 30px -20px rgba(20,18,42,.35);border-color:#E2DDF4}
.nav-wrap{display:flex;align-items:center;gap:14px;height:64px}
@media(min-width:1024px){.nav-wrap{height:72px;gap:22px}}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;min-height:44px}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--grad);
  display:grid;place-items:center;color:#fff;font-size:14px;line-height:1;
  box-shadow:0 8px 18px -8px rgba(109,59,245,.75);flex-shrink:0;
}
.brand-text{display:flex;align-items:baseline;gap:6px;line-height:1.2;min-width:0}
.brand-text b{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.brand-text i{font-style:normal;font-size:11px;color:var(--ink3);white-space:nowrap;display:none}
@media(min-width:520px){.brand-text i{display:inline}}
.main-nav{display:none;align-items:center;gap:2px;margin-left:6px}
@media(min-width:1100px){.main-nav{display:flex}}
.main-nav a{
  position:relative;padding:10px 12px;font-size:16px;font-weight:600;color:var(--ink2);
  border-radius:10px;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:3px;height:3px;border-radius:3px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.main-nav a:hover{color:var(--brand)}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1)}
.main-nav a.active{color:var(--brand)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-actions .btn-ghost{display:none}
@media(min-width:1024px){.nav-actions .btn-ghost{display:inline-flex}}
@media(max-width:640px){.nav-actions .btn-primary{display:none}}
.nav-toggle{
  width:44px;height:44px;border-radius:14px;background:#fff;border:1.5px solid #E4E0F5;
  display:grid;place-items:center;color:var(--ink);flex-shrink:0;
}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand)}
@media(min-width:1100px){.nav-toggle{display:none}}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:currentColor;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:currentColor;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,18,42,.45);z-index:90;
  opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s var(--ease);
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:86vw;max-width:360px;background:#fff;z-index:100;
  border-radius:24px 0 0 24px;padding:20px 20px 26px;
  transform:translateX(102%);transition:transform .34s var(--ease);
  display:flex;flex-direction:column;gap:8px;overflow-y:auto;
  box-shadow:-24px 0 60px -30px rgba(20,18,42,.5);
}
.drawer.open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.drawer-title{font-size:15px;font-weight:800;color:var(--ink)}
.drawer-close{width:44px;height:44px;border-radius:14px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:20px;line-height:1}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:14px 16px;border-radius:16px;background:#FAF9FE;border:1px solid var(--line);
  font-size:15px;font-weight:600;color:var(--ink2);min-height:48px;
}
.drawer-link:hover,.drawer-link.active{background:var(--brand-soft);color:var(--brand);border-color:rgba(109,59,245,.24)}
.drawer-foot{margin-top:auto;padding-top:18px}

/* ============ Hero ============ */
.hero{position:relative;overflow:hidden;padding:36px 0 60px}
@media(min-width:1024px){.hero{padding:64px 0 92px}}
.hero-glow{
  position:absolute;top:-140px;left:-180px;width:480px;height:480px;border-radius:50%;
  background:var(--grad);opacity:.18;filter:blur(120px);pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1fr;gap:40px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:52px}}
.hero h1{margin-top:20px;max-width:18ch}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin-top:16px;font-size:17px;line-height:1.85;color:var(--ink2);max-width:30ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px}
.stat{display:flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;background:var(--accent-soft)}
.stat .num{font-size:22px;font-weight:800;color:var(--accent-deep);font-variant-numeric:tabular-nums;line-height:1}
.stat .lbl{font-size:12px;color:#2F7D72}
.stat.warm{background:var(--hot-soft)}
.stat.warm .num{color:#D9551C}
.stat.warm .lbl{color:#A65328}

.hero-visual{position:relative}
.hero-img{position:relative;border-radius:28px;overflow:hidden;aspect-ratio:16/11;box-shadow:var(--sh1)}
.hero-img img{width:100%;height:100%;object-fit:cover}
.hero-img::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(158deg,rgba(20,18,42,.18) 0%,rgba(20,18,42,.02) 52%,rgba(109,59,245,.24) 100%);
}
.hero-badge{
  position:absolute;top:16px;right:16px;z-index:2;
  display:flex;align-items:center;gap:8px;
  background:#fff;border-radius:999px;padding:8px 16px;box-shadow:0 14px 30px -16px rgba(20,18,42,.45);
}
.hero-badge .num{font-size:22px;font-weight:800;color:var(--accent-deep);font-variant-numeric:tabular-nums;line-height:1}
.hero-badge .lbl{font-size:12px;color:var(--ink3)}
.hero-mini{
  position:relative;z-index:3;margin-top:-30px;margin-left:0;
  width:100%;max-width:330px;
  display:flex;align-items:center;gap:14px;
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px 18px;
  box-shadow:var(--sh1);
}
.hero-mini .ico{
  width:40px;height:40px;border-radius:12px;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:16px;flex-shrink:0;
}
.hero-mini h4{font-size:15px}
.hero-mini p{font-size:13px;color:var(--ink3);line-height:1.6;margin-top:2px}

/* ============ 价值条 ============ */
.value-strip{
  display:grid;grid-template-columns:repeat(2,1fr);gap:30px 0;
  padding:32px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
@media(min-width:768px){.value-strip{grid-template-columns:repeat(4,1fr);gap:0}}
.value-item{display:flex;gap:12px;padding:0 4px;position:relative}
@media(min-width:768px){.value-item{padding:0 20px}}
.value-item + .value-item::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:48px;background:linear-gradient(180deg,transparent,#DCD6F2,transparent);
  display:none;
}
@media(min-width:768px){.value-item + .value-item::before{display:block}}
.value-ico{
  width:24px;height:24px;border-radius:50%;background:var(--grad);flex-shrink:0;margin-top:6px;
  display:grid;place-items:center;color:#fff;font-size:12px;font-weight:800;
}
.value-item h4{font-size:15px;margin-bottom:4px}
.value-item p{font-size:13px;line-height:1.7;color:var(--ink3)}

/* ============ 卡片基础 ============ */
.card-l{
  background:var(--card);border:1px solid var(--line);border-radius:28px;padding:28px;
  box-shadow:var(--sh1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.card-l:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(109,59,245,.22)}
.card-s{
  background:var(--brand-soft);border:1px solid rgba(109,59,245,.12);border-radius:28px;padding:28px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.card-s:hover{transform:translateY(-4px);box-shadow:var(--sh1)}
.card-ico{
  width:40px;height:40px;border-radius:10px;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:16px;margin-bottom:18px;
  box-shadow:0 12px 22px -14px rgba(109,59,245,.75);
}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 13px;border-radius:999px;background:var(--brand-soft);
  color:var(--brand);font-size:12px;font-weight:600;line-height:1.5;
}
.chip-accent{background:var(--accent-soft);color:var(--accent-deep)}
.chip-warm{background:var(--hot-soft);color:#D9551C}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.badge-num{
  display:inline-flex;align-items:baseline;gap:4px;
  padding:7px 15px;border-radius:999px;background:var(--accent-soft);
}
.badge-num b{font-size:22px;font-weight:800;color:var(--accent-deep);font-variant-numeric:tabular-nums;line-height:1}
.badge-num i{font-style:normal;font-size:12px;color:#3E8579}
.badge-num.warm{background:var(--hot-soft)}
.badge-num.warm b{color:#D9551C}
.badge-num.warm i{color:#A65328}

/* ============ Bento ============ */
.bento{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:768px){.bento{grid-template-columns:repeat(12,1fr)}}
@media(min-width:768px){
  .bento-a{grid-column:span 7}
  .bento-b{grid-column:span 5}
  .bento-c,.bento-d,.bento-e{grid-column:span 4}
}
.bento-a p.lead{margin-top:12px;font-size:15px;line-height:1.85;color:var(--ink2)}
.bento-data{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;padding-top:22px;border-top:1px dashed #DCD6F2;
}
.bento-list li{
  display:flex;gap:10px;align-items:flex-start;padding:10px 0;font-size:15px;color:var(--ink2);
  border-bottom:1px dashed #EFEDF9;
}
.bento-list li:last-child{border-bottom:0}
.bento-list li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);flex-shrink:0;margin-top:9px;
}
.bento-imgcard{padding:0;overflow:hidden;position:relative;min-height:260px}
.bento-imgcard img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.bento-imgcard .mask{
  position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,18,42,.05) 0%,rgba(20,18,42,.72) 100%);
}
.bento-imgcard .txt{position:relative;z-index:2;padding:24px;display:flex;flex-direction:column;justify-content:flex-end;height:100%;min-height:260px}
.bento-imgcard .txt h4{color:#fff}
.bento-imgcard .txt p{color:rgba(255,255,255,.75);font-size:13px;line-height:1.7;margin-top:6px}
.bento-numwall{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:6px}
.bento-numwall div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 16px}
.bento-numwall b{display:block;font-size:22px;font-weight:800;color:var(--accent-deep);font-variant-numeric:tabular-nums;line-height:1.2}
.bento-numwall span{font-size:12px;color:var(--ink3)}

/* ============ 流程 ============ */
.flow{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:768px){.flow{grid-template-columns:repeat(4,1fr);gap:20px}}
.flow-step{
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;
  box-shadow:var(--sh1);position:relative;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.flow-step:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(109,59,245,.22)}
.flow-step::after{
  content:"";position:absolute;top:40px;right:-12px;width:22px;height:1px;
  background-image:linear-gradient(90deg,rgba(109,59,245,.55) 0 4px,transparent 4px 8px);
  background-size:8px 1px;display:none;
}
@media(min-width:768px){.flow-step:not(:last-child)::after{display:block}}
.flow-num{
  width:32px;height:32px;border-radius:50%;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:15px;margin-bottom:16px;
  font-variant-numeric:tabular-nums;
}
.flow-step h4{margin-bottom:8px}
.flow-step p{font-size:14px;line-height:1.8;color:var(--ink2)}

/* ============ 案例 ============ */
.case-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:900px){.case-grid{grid-template-columns:repeat(2,1fr)}.case-wide{grid-column:span 2}}
.case-card{
  border-radius:28px;overflow:hidden;border:1px solid var(--line);background:#fff;
  box-shadow:var(--sh1);display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(109,59,245,.22)}
.case-card.soft{background:var(--brand-soft)}
.case-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.case-thumb img{width:100%;height:100%;object-fit:cover}
.case-thumb .chip{position:absolute;top:16px;left:16px;background:#fff}
.case-thumb .badge-num{position:absolute;top:16px;right:16px;background:#fff;box-shadow:0 10px 24px -14px rgba(20,18,42,.4)}
.case-body{padding:24px 26px 26px;display:flex;flex-direction:column;flex:1}
.case-body h3{margin-bottom:10px}
.case-body p{font-size:15px;line-height:1.85;color:var(--ink2);flex:1}

/* ============ 价格 ============ */
.price-tabs{display:flex;gap:8px;margin-bottom:26px}
.price-tab{
  padding:9px 18px;border-radius:999px;background:#fff;border:1.5px solid #E4E0F5;
  color:var(--ink2);font-size:14px;font-weight:600;min-height:40px;
}
.price-tab.on{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 12px 26px -16px rgba(109,59,245,.7)}
.price-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:768px){.price-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.price-grid{grid-template-columns:repeat(3,1fr);align-items:start}}
.plan{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:28px;padding:28px;
  box-shadow:var(--sh1);display:flex;flex-direction:column;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.plan:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(109,59,245,.22)}
.plan-hot{
  border:1.5px solid transparent;
  background-image:linear-gradient(#fff,#fff),var(--grad);
  background-origin:border-box;background-clip:padding-box,border-box;
  box-shadow:0 26px 52px -24px rgba(109,59,245,.45);
}
@media(min-width:1024px){
  .plan-hot{transform:translateY(-8px)}
  .plan-hot:hover{transform:translateY(-12px)}
}
.plan-tag{
  position:absolute;top:-13px;left:28px;
  padding:5px 14px;border-radius:999px;background:var(--hot);color:#fff;
  font-size:12px;font-weight:700;letter-spacing:.02em;
}
.plan h3{font-size:19px}
.plan .plan-sub{font-size:13px;color:var(--ink3);margin-top:6px}
.plan-price{display:flex;align-items:baseline;gap:6px;margin:22px 0 6px}
.plan-price b{font-size:36px;font-weight:800;color:var(--ink);font-variant-numeric:tabular-nums;line-height:1;letter-spacing:-.02em}
.plan-price i{font-style:normal;font-size:12px;color:var(--ink3)}
.plan ul{margin:20px 0 26px;display:flex;flex-direction:column;gap:12px}
.plan ul li{display:flex;gap:10px;font-size:14px;line-height:1.7;color:var(--ink2)}
.plan ul li::before{
  content:"✓";flex-shrink:0;width:16px;height:16px;border-radius:50%;
  background:var(--accent-soft);color:var(--accent-deep);
  font-size:10px;display:grid;place-items:center;margin-top:4px;font-weight:800;
}
.plan .btn-primary,.plan .btn-ghost{width:100%;margin-top:auto}

/* ============ 资讯列表 ============ */
.news-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media(min-width:768px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr)}}
.news-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:20px;overflow:hidden;box-shadow:var(--sh1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(109,59,245,.22)}
.news-thumb{display:block;aspect-ratio:16/10;overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.news-body h3{
  font-size:17px;line-height:1.5;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-body .sum{
  margin-top:10px;font-size:15px;line-height:1.75;color:var(--ink2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  flex:1;
}
.news-meta{
  display:flex;align-items:center;gap:10px;margin-top:18px;padding-top:16px;
  border-top:1px solid var(--line);flex-wrap:wrap;
}
.news-meta time{font-size:13px;color:var(--ink3);font-variant-numeric:tabular-nums}
.news-meta .text-link{margin-left:auto;font-size:14px;min-height:auto}
.empty-state{
  grid-column:1/-1;border:2px dashed #DCD6F2;border-radius:20px;padding:52px 24px;text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:14px;background:#FCFBFF;
}
.empty-state .empty-ico{
  width:48px;height:48px;border-radius:50%;border:1.5px solid #DCD6F2;color:var(--brand);
  display:grid;place-items:center;font-size:20px;
}
.empty-state p{font-size:15px;color:var(--ink2)}

/* ============ FAQ ============ */
.faq-list{max-width:880px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:18px;margin-bottom:14px;
  overflow:hidden;transition:border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  display:flex;align-items:flex-start;gap:12px;
  padding:20px 22px;font-size:17px;font-weight:700;color:var(--ink);min-height:44px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .q-ico{
  width:20px;height:20px;border-radius:50%;border:1.5px solid var(--accent);
  color:var(--accent-deep);font-size:12px;font-weight:800;display:grid;place-items:center;
  flex-shrink:0;margin-top:4px;
}
.faq-item summary::after{
  content:"+";margin-left:auto;font-size:22px;font-weight:400;color:var(--ink3);
  line-height:1;transition:transform .25s var(--ease),color .25s var(--ease);
  padding-left:12px;
}
.faq-item[open]{border-color:rgba(109,59,245,.28);box-shadow:var(--sh1)}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--brand)}
.faq-item[open] summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--grad);
}
.faq-body{padding:0 22px 22px 54px;font-size:15px;line-height:1.9;color:var(--ink2)}
@media(max-width:520px){.faq-body{padding-left:22px}}

/* ============ 底部 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:32px;background:#14122A;
  padding:44px 28px;display:flex;flex-direction:column;gap:26px;
}
@media(min-width:1024px){.cta-band{padding:56px;flex-direction:row;align-items:center;gap:40px}}
.cta-band::before{
  content:"";position:absolute;top:-120px;right:-80px;width:420px;height:420px;border-radius:50%;
  background:var(--grad);opacity:.28;filter:blur(110px);pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.28;
  background-image:radial-gradient(rgba(255,255,255,.35) 1px,transparent 1px);
  background-size:22px 22px;
}
.cta-band h2{color:#fff;position:relative;z-index:2;max-width:16ch}
.cta-band p{position:relative;z-index:2;margin-top:12px;color:rgba(255,255,255,.72);font-size:15px;line-height:1.85;max-width:42ch}
.cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:14px}
@media(min-width:1024px){.cta-actions{margin-left:auto;flex-shrink:0}}
.btn-outline-light{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:14px;border:1.5px solid rgba(255,255,255,.28);
  color:#fff;font-weight:600;font-size:15px;background:rgba(255,255,255,.06);
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
  white-space:nowrap;
}
.btn-outline-light:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.5);transform:translateY(-1px);color:#fff}

/* ============ 页脚 ============ */
.site-footer{background:#14122A;margin-top:88px;border-radius:32px 32px 0 0;padding:56px 0 0;color:rgba(255,255,255,.65)}
@media(min-width:1024px){.site-footer{padding:72px 0 0}}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .brand-mark{box-shadow:none}
.footer-brand b{color:#fff;font-size:17px;font-weight:800}
.footer-brand i{font-style:normal;font-size:12px;color:rgba(255,255,255,.45);margin-left:6px}
.footer-intro{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:34ch}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{
  width:40px;height:40px;border-radius:12px;background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);display:grid;place-items:center;
  color:rgba(255,255,255,.75);font-size:14px;font-weight:700;
}
.footer-social a:hover{background:rgba(15,205,184,.18);color:#7CF0E2;border-color:rgba(15,205,184,.4)}
.site-footer h4{color:rgba(255,255,255,.92);font-size:15px;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:rgba(255,255,255,.62);padding:3px 0}
.footer-links a:hover{color:#7CF0E2;transform:translateX(3px)}
.footer-contact li{display:flex;gap:8px;font-size:14px;color:rgba(255,255,255,.62);margin-bottom:10px;line-height:1.7}
.footer-contact li span{color:rgba(255,255,255,.4);flex-shrink:0}
.footer-bottom{
  margin-top:44px;padding:22px 0;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:12px 20px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a:hover{color:#7CF0E2}
.footer-bottom .legal{display:flex;flex-wrap:wrap;gap:16px}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:20px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--grad);color:#fff;display:grid;place-items:center;z-index:70;
  box-shadow:0 16px 32px -14px rgba(109,59,245,.72);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .26s var(--ease),transform .26s var(--ease),visibility .26s var(--ease);
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{filter:brightness(1.06)}
@media(min-width:1024px){.to-top{right:32px;bottom:36px}}

/* ============ 入场动画 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{animation:none !important}
}

/* roulang page: article */
:root{
  --brand:#6D3BF5; --brand-soft:#F3F0FF; --accent:#0FCDB8; --accent-soft:#E8FBF8;
  --hot:#FF6A2B; --hot-soft:#FFF1E8;
  --bg:#F7F6FB; --card:#FFFFFF; --ink:#14122A; --body:#3A3750; --sub:#5A5772; --mute:#8B88A3;
  --line:#ECE9F8; --dark:#14122A;
  --grad:linear-gradient(120deg,#6D3BF5 0%,#A83BF0 48%,#FF5F7E 100%);
  --sh1:0 1px 2px rgba(20,18,42,.04), 0 10px 26px -14px rgba(109,59,245,.20);
  --sh2:0 22px 44px -18px rgba(109,59,245,.38);
  --r-lg:28px; --r-md:20px; --r-sm:16px; --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;background:var(--bg);color:var(--body);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  font-size:16px;line-height:1.9;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button,input{font:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800;letter-spacing:-0.01em}
p{margin:0}
.num{font-variant-numeric:tabular-nums}
.container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}
@media (min-width:1024px){.container{padding:0 32px}}
.section-pad{padding-top:64px;padding-bottom:64px}
@media (min-width:1024px){.section-pad{padding-top:96px;padding-bottom:96px}}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(109,59,245,.35);border-radius:10px}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;min-height:72px;
  background:rgba(247,246,251,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);transition:box-shadow .25s var(--ease),border-color .25s var(--ease)
}
.site-header.scrolled{box-shadow:0 10px 30px -18px rgba(20,18,42,.35);border-bottom-color:#DFDAF3}
.nav-wrap{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;line-height:1;flex-shrink:0
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:16px;color:var(--ink);font-weight:800}
.brand-text i{font-style:normal;font-size:12px;color:var(--mute)}
.main-nav{display:none;align-items:center;gap:26px;margin-left:auto}
.main-nav a{position:relative;font-size:17px;font-weight:600;color:var(--sub);padding:6px 0;white-space:nowrap}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:3px;border-radius:3px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease)
}
.main-nav a:hover{color:var(--brand)}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1)}
.main-nav a.active{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:auto}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 24px;border:0;border-radius:999px;cursor:pointer;
  background:var(--grad);color:#fff;font-size:15px;font-weight:700;white-space:nowrap;
  box-shadow:var(--sh1);transition:transform .22s var(--ease),box-shadow .22s var(--ease),filter .22s var(--ease)
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh2);filter:brightness(1.06)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-ghost{
  display:none;align-items:center;justify-content:center;
  min-height:44px;padding:0 20px;border:1.5px solid #E4E0F5;border-radius:14px;
  background:#fff;color:var(--brand);font-size:15px;font-weight:600;white-space:nowrap;
  transition:background .22s var(--ease),border-color .22s var(--ease)
}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand)}
.nav-toggle{
  width:44px;height:44px;border-radius:12px;border:1.5px solid #E4E0F5;background:#fff;
  display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);position:relative;transition:.25s var(--ease)
}
.nav-toggle span::before{position:absolute;top:-6px;left:0}
.nav-toggle span::after{position:absolute;top:6px;left:0}
@media (min-width:1024px){
  .main-nav{display:flex}
  .nav-actions{margin-left:24px}
  .btn-ghost{display:inline-flex}
  .nav-toggle{display:none}
}

/* drawer */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,18,42,.45);opacity:0;visibility:hidden;
  transition:.28s var(--ease);z-index:70
}
.drawer-mask.open{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;right:0;height:100%;width:86vw;max-width:360px;background:#fff;
  border-radius:24px 0 0 24px;transform:translateX(100%);transition:transform .3s var(--ease);
  z-index:80;display:flex;flex-direction:column;padding:22px 20px;overflow-y:auto
}
.nav-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1.5px solid #E4E0F5;background:#fff;cursor:pointer;color:var(--ink);font-size:20px;line-height:1}
.drawer-links{display:flex;flex-direction:column;gap:6px}
.drawer-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:14px 16px;border-radius:14px;background:var(--brand-soft);color:var(--ink);font-weight:600;font-size:15px
}
.drawer-links a:hover{background:#E9E2FF;color:var(--brand)}
.drawer-cta{margin-top:auto;padding-top:20px}

/* ---------- breadcrumb ---------- */
.crumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;color:var(--mute);padding-top:26px}
.crumb a{color:var(--mute)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C9C5DE}
.crumb .now{color:var(--brand);font-weight:600}

/* ---------- article head ---------- */
.article-head{padding:20px 0 26px}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600
}
.article-title{font-size:clamp(24px,3.2vw,38px);line-height:1.3;margin-top:16px}
.meta-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:14px;color:var(--mute);margin-top:16px}
.meta-row .dot{color:#C9C5DE}
.hr-grad{height:1px;border:0;margin-top:26px;background:linear-gradient(90deg,#6D3BF5,#FF5F7E,rgba(255,95,126,0))}

/* ---------- layout ---------- */
.read-layout{display:grid;grid-template-columns:1fr;gap:32px;padding-top:32px}
@media (min-width:1280px){.read-layout{grid-template-columns:minmax(0,1fr) 260px}}
.read-main{min-width:0}
.hero-figure{border-radius:20px;overflow:hidden;border:1px solid var(--line);background:#fff}
.hero-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.aside-card{
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--sh1)
}
.aside-sticky{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px}
.aside-card h3{font-size:16px;margin-bottom:12px}
.aside-list{display:flex;flex-direction:column;gap:10px}
.aside-list a{display:flex;align-items:center;gap:8px;justify-content:space-between;font-size:14px;color:var(--sub);padding:8px 0;border-bottom:1px dashed var(--line)}
.aside-list a:last-child{border-bottom:0}
.aside-list a:hover{color:var(--brand)}
.aside-list a span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.aside-nav a{justify-content:flex-start;color:var(--body);font-weight:600;border-bottom:0;padding:9px 10px;border-radius:12px}
.aside-nav a:hover{background:var(--brand-soft);color:var(--brand)}

/* ---------- prose ---------- */
.prose-cn{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 20px;margin-top:24px;box-shadow:var(--sh1)}
@media (min-width:768px){.prose-cn{padding:40px 44px}}
.prose-cn>*+*{margin-top:20px}
.prose-cn p{font-size:16px;line-height:1.95;color:var(--body)}
.prose-cn h2{
  font-size:clamp(20px,2.2vw,26px);line-height:1.4;color:var(--ink);margin-top:40px;
  padding-left:16px;position:relative
}
.prose-cn h2::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:4px;border-radius:4px;background:var(--grad)
}
.prose-cn h3{font-size:22px;line-height:1.5;margin-top:30px}
.prose-cn h4{font-size:17px;margin-top:24px}
.prose-cn ul,.prose-cn ol{padding-left:8px;margin-top:16px}
.prose-cn li{position:relative;padding-left:20px;margin-top:12px;font-size:15px;line-height:1.85;color:var(--body)}
.prose-cn ul>li::before{
  content:"";position:absolute;left:2px;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand)
}
.prose-cn ol{counter-reset:li}
.prose-cn ol>li::before{
  counter-increment:li;content:counter(li);position:absolute;left:0;top:2px;
  font-size:13px;font-weight:800;color:var(--brand)
}
.prose-cn blockquote{
  margin:28px 0;padding:18px 22px;background:var(--brand-soft);border-left:4px solid var(--brand);
  border-radius:16px;color:var(--ink);font-size:15px;line-height:1.9
}
.prose-cn blockquote p{color:var(--ink);margin:0}
.prose-cn img{border-radius:20px;margin:12px auto 0;box-shadow:var(--sh1)}
.prose-cn figure{margin:24px 0}
.prose-cn figcaption{font-size:13px;color:var(--mute);text-align:center;margin-top:10px}
.prose-cn a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.prose-cn a:hover{color:var(--hot)}
.prose-cn table{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;font-size:15px}
.prose-cn thead th{background:var(--brand-soft);color:var(--ink);font-weight:700;text-align:left;padding:12px 14px}
.prose-cn tbody td{padding:12px 14px;border-top:1px solid var(--line);color:var(--body)}
.prose-cn tbody tr:nth-child(even){background:#FAF9FE}
.prose-cn code{background:var(--brand-soft);color:var(--brand);padding:2px 6px;border-radius:6px;font-size:14px}
.prose-cn hr{border:0;height:1px;background:var(--line);margin:32px 0}

/* ---------- empty ---------- */
.empty-card{
  border:2px dashed #DCD6F3;border-radius:20px;background:#fff;padding:44px 24px;text-align:center
}
.empty-card svg{margin:0 auto 14px}
.empty-card h3{font-size:19px}
.empty-card p{font-size:15px;color:var(--sub);margin-top:10px}

/* ---------- buttons ---------- */
.btn-soft{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 22px;
  border:1.5px solid #E4E0F5;border-radius:14px;background:#fff;color:var(--brand);font-weight:600;font-size:15px;
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);cursor:pointer
}
.btn-soft:hover{background:var(--brand-soft);border-color:var(--brand);transform:translateY(-2px)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-size:15px;font-weight:600}
.link-arrow svg{transition:transform .22s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- tags ---------- */
.tag-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:28px}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;transition:.22s var(--ease)
}
.tag:hover{background:var(--brand);color:#fff}

/* ---------- prev / next ---------- */
.pn-grid{display:grid;grid-template-columns:1fr;gap:16px;margin-top:28px}
@media (min-width:768px){.pn-grid{grid-template-columns:1fr 1fr}}
.pn-card{
  display:flex;flex-direction:column;gap:8px;background:#fff;border:1px solid var(--line);border-radius:20px;
  padding:20px;box-shadow:var(--sh1);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)
}
.pn-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(109,59,245,.2)}
.pn-card small{font-size:13px;color:var(--mute)}
.pn-card b{font-size:16px;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ---------- related ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}
.sec-head h2{font-size:clamp(22px,2.6vw,30px)}
.rel-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:28px}
@media (min-width:768px){.rel-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.rel-grid{grid-template-columns:repeat(3,1fr)}}
.card-cms{
  background:#fff;border:1px solid var(--line);border-radius:24px;padding:16px;box-shadow:var(--sh1);
  display:flex;flex-direction:column;gap:14px;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)
}
.card-cms:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(109,59,245,.2)}
.card-cms img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:20px}
.card-cms h3{font-size:16px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-cms p{font-size:15px;color:var(--sub);line-height:1.85;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;font-size:13px;color:var(--mute)}
.card-foot .chip{height:26px;font-size:12px}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--dark);border-radius:32px;padding:36px 24px;
  display:flex;flex-direction:column;gap:24px
}
.cta-band::before{
  content:"";position:absolute;width:420px;height:420px;left:-120px;top:-180px;border-radius:50%;
  background:var(--grad);opacity:.28;filter:blur(90px)
}
.cta-band::after{
  content:"";position:absolute;inset:0;opacity:.16;
  background-image:radial-gradient(rgba(255,255,255,.45) 1px,transparent 1px);background-size:16px 16px
}
.cta-band>*{position:relative;z-index:1}
.cta-band h2{color:#fff;font-size:clamp(22px,2.4vw,30px)}
.cta-band p{color:rgba(255,255,255,.72);font-size:16px;margin-top:10px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.btn-light{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 22px;
  border-radius:14px;border:1.5px solid rgba(255,255,255,.35);color:#fff;font-weight:600;font-size:15px;background:transparent
}
.btn-light:hover{background:rgba(255,255,255,.12)}
@media (min-width:1024px){
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:48px 52px}
}

/* ---------- footer ---------- */
.site-footer{margin-top:72px;background:var(--dark);color:rgba(255,255,255,.65)}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding:56px 0 36px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand b{color:#fff;font-size:16px;font-weight:800}
.footer-brand i{font-style:normal;font-size:12px;color:rgba(255,255,255,.5)}
.footer-intro{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{
  display:inline-flex;align-items:center;justify-content:center;height:34px;padding:0 16px;border-radius:999px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);color:rgba(255,255,255,.8);font-size:13px
}
.footer-social a:hover{background:rgba(15,205,184,.18);color:#fff}
.site-footer h4{font-size:15px;color:rgba(255,255,255,.9);font-weight:700;margin-bottom:14px}
.footer-links,.footer-contact{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.65);display:inline-block}
.footer-links a:hover{color:var(--accent);transform:translateX(3px)}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.65)}
.footer-contact li span{display:inline-block;min-width:74px;color:rgba(255,255,255,.4)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0 30px;font-size:13px;color:rgba(255,255,255,.5)
}
.footer-bottom .legal{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom a{color:rgba(255,255,255,.5)}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- to top ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;width:48px;height:48px;border-radius:50%;border:0;cursor:pointer;
  background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh2);opacity:0;visibility:hidden;transform:translateY(10px);transition:.28s var(--ease);z-index:50
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --brand:#6D3BF5;
  --violet:#A83BF0;
  --rose:#FF5F7E;
  --accent:#0FCDB8;
  --hot:#FF6A2B;
  --bg:#F7F6FB;
  --card:#FFFFFF;
  --deep:#14122A;
  --ink:#14122A;
  --ink2:#5A5772;
  --ink3:#8B88A3;
  --body:#3A3750;
  --line:#ECE9F8;
  --line2:#E4E0F5;
  --soft:#F3F0FF;
  --grad:linear-gradient(120deg,#6D3BF5 0%,#A83BF0 48%,#FF5F7E 100%);
  --r-lg:28px;
  --r-md:20px;
  --r-sm:16px;
  --sh1:0 1px 2px rgba(20,18,42,.04),0 10px 26px -14px rgba(109,59,245,.20);
  --sh2:0 22px 44px -18px rgba(109,59,245,.38);
  --t:220ms cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--body);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.25;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(109,59,245,.35);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:1024px){ .container{padding:0 32px;} }

.section-pad{padding:64px 0;}
@media (min-width:1024px){ .section-pad{padding:96px 0;} }

.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.num{font-variant-numeric:tabular-nums;}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,251,.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t),border-color var(--t);
}
.site-header.is-solid{box-shadow:0 10px 30px -18px rgba(20,18,42,.28);border-color:#E2DDF5;}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px;}
@media (min-width:1024px){ .nav-wrap{height:72px;gap:28px;} }

.brand{display:flex;align-items:center;gap:10px;min-height:44px;flex:0 0 auto;}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:14px;font-weight:700;line-height:1;
  box-shadow:0 6px 16px -8px rgba(109,59,245,.7);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.01em;}
.brand-text i{font-size:12px;font-style:normal;color:var(--ink3);}

.main-nav{display:none;}
@media (min-width:1024px){
  .main-nav{display:flex;align-items:center;gap:26px;flex:1 1 auto;justify-content:center;}
}
.main-nav a{
  position:relative;font-size:16px;font-weight:600;color:var(--ink2);
  padding:12px 2px;transition:color var(--t);white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:3px;border-radius:3px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;
  transition:transform var(--t);
}
.main-nav a:hover{color:var(--brand);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--brand);}
.main-nav a.active::after{transform:scaleX(1);}

.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-actions .btn-ghost{display:none;}
.nav-actions .btn-primary{display:none;}
@media (min-width:1024px){
  .nav-actions .btn-ghost{display:inline-flex;}
  .nav-actions .btn-primary{display:inline-flex;}
}
.nav-toggle{
  width:44px;height:44px;border-radius:14px;border:1.5px solid var(--line2);
  background:#fff;display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:border-color var(--t),background var(--t);
}
.nav-toggle:hover{border-color:var(--brand);background:var(--soft);}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform var(--t);
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
@media (min-width:1024px){ .nav-toggle{display:none;} }

/* mobile drawer */
.main-nav.is-open{
  display:flex;flex-direction:column;align-items:flex-start;gap:4px;
  position:fixed;top:0;right:0;bottom:0;width:86vw;max-width:360px;
  background:#fff;border-radius:24px 0 0 24px;padding:88px 24px 24px;
  box-shadow:-20px 0 50px -20px rgba(20,18,42,.35);z-index:80;
}
.main-nav.is-open a{font-size:17px;padding:14px 0;width:100%;border-bottom:1px solid var(--line);}
.main-nav.is-open a::after{bottom:10px;right:auto;width:26px;}
.nav-mask{
  position:fixed;inset:0;background:rgba(20,18,42,.45);z-index:70;
  opacity:0;visibility:hidden;transition:opacity var(--t),visibility var(--t);
}
.nav-mask.is-open{opacity:1;visibility:visible;}

/* ============ buttons ============ */
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:999px;border:0;cursor:pointer;
  background:var(--grad);color:#fff;font-size:15px;font-weight:700;
  box-shadow:0 12px 26px -14px rgba(109,59,245,.75);
  transition:transform var(--t),filter var(--t),box-shadow var(--t);
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:0 20px 36px -16px rgba(109,59,245,.85);}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-primary svg{transition:transform var(--t);}
.btn-primary:hover svg{transform:translateX(2px);}

.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:14px;cursor:pointer;
  background:#fff;border:1.5px solid var(--line2);color:var(--brand);
  font-size:15px;font-weight:700;
  transition:border-color var(--t),background var(--t),transform var(--t),color var(--t);
}
.btn-ghost:hover{border-color:var(--brand);background:var(--soft);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-primary[disabled],.btn-ghost[disabled]{opacity:.4;cursor:not-allowed;transform:none;}

.btn-ghost.on-deep{background:transparent;border-color:rgba(255,255,255,.28);color:#fff;}
.btn-ghost.on-deep:hover{background:rgba(255,255,255,.1);border-color:#fff;}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand);
  font-size:15px;font-weight:600;transition:color var(--t);
}
.link-arrow svg{transition:transform var(--t);}
.link-arrow:hover svg{transform:translateX(4px);}
.link-arrow:hover{color:var(--violet);}

/* ============ badges & chips ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 16px;
  border-radius:999px;font-size:12px;font-weight:600;white-space:nowrap;
}
.badge b{font-size:22px;font-weight:800;font-variant-numeric:tabular-nums;line-height:1;}
.badge i{font-style:normal;font-size:12px;}
.badge em{font-style:normal;font-size:12px;font-weight:600;opacity:.9;}
.badge.accent{background:#E8FBF8;color:#0B8C7C;}
.badge.hot{background:#FFF1E8;color:#C64A13;}

.chip{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;
  background:var(--soft);color:var(--brand);font-size:13px;font-weight:600;
  border:1px solid #E7E0FF;
}
.chip.plain{background:#fff;color:var(--ink2);border-color:var(--line);}

/* ============ hero ============ */
.page-hero{padding:28px 0 8px;}
@media (min-width:1024px){ .page-hero{padding:40px 0 12px;} }
.hero-panel{
  position:relative;overflow:hidden;
  background:linear-gradient(160deg,#F3F0FF 0%,#FFFFFF 78%);
  border:1px solid var(--line);border-radius:32px;
  padding:28px 20px 32px;
}
@media (min-width:1024px){ .hero-panel{padding:44px 48px 48px;} }
.hero-panel::after{
  content:"";position:absolute;right:-140px;top:-160px;width:380px;height:380px;border-radius:50%;
  background:var(--grad);opacity:.14;filter:blur(90px);pointer-events:none;
}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink3);margin-bottom:20px;flex-wrap:wrap;}
.crumb a{transition:color var(--t);}
.crumb a:hover{color:var(--brand);}
.crumb em{font-style:normal;color:var(--brand);font-weight:600;}

.hero-grid{display:grid;grid-template-columns:1fr;gap:32px;align-items:center;position:relative;z-index:1;}
@media (min-width:1024px){ .hero-grid{grid-template-columns:7fr 5fr;gap:44px;} }

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand);
  background:#fff;border:1px solid #E7E0FF;border-radius:999px;padding:6px 14px;margin-bottom:16px;
}
.hero-copy h1{
  font-size:clamp(30px,4.4vw,44px);font-weight:800;letter-spacing:-.02em;line-height:1.15;
}
.hero-sub{margin-top:14px;font-size:16px;line-height:1.9;color:var(--ink2);max-width:520px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}

.hero-visual{position:relative;border-radius:28px;overflow:hidden;box-shadow:var(--sh1);}
.hero-visual img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.hero-visual::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(20,18,42,.32) 0%,rgba(20,18,42,.06) 55%,rgba(20,18,42,0) 100%);
}
.hero-float{
  position:absolute;right:16px;top:16px;z-index:2;background:#fff;border-radius:16px;
  padding:10px 16px;box-shadow:0 16px 30px -18px rgba(20,18,42,.5);display:flex;align-items:baseline;gap:6px;
}
.hero-float b{font-size:22px;font-weight:800;color:#0B8C7C;font-variant-numeric:tabular-nums;line-height:1;}
.hero-float span{font-size:12px;color:var(--ink2);font-weight:600;}

/* ============ split layout ============ */
.split{display:grid;grid-template-columns:1fr;gap:28px;}
@media (min-width:1024px){
  .split{grid-template-columns:3fr 9fr;gap:32px;align-items:start;}
}

.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh1);
}
@media (min-width:1024px){
  .side-card{position:sticky;top:96px;}
}
.side-title{font-size:15px;font-weight:800;color:var(--ink);margin-bottom:14px;}
.side-list li + li{margin-top:4px;}
.side-list a{
  display:flex;align-items:center;gap:8px;padding:10px 12px;border-radius:12px;
  font-size:14px;color:var(--ink2);font-weight:600;transition:background var(--t),color var(--t);
}
.side-list a::before{
  content:"";width:6px;height:6px;border-radius:50%;background:#D8D1F2;flex:0 0 auto;transition:background var(--t);
}
.side-list a:hover{background:var(--soft);color:var(--brand);}
.side-list a:hover::before{background:var(--brand);}
.side-card .btn-ghost{width:100%;margin-top:16px;}
.side-note{
  margin-top:16px;padding-top:16px;border-top:1px dashed var(--line2);
  font-size:13px;color:var(--ink3);line-height:1.8;
}

.zig-list{display:flex;flex-direction:column;gap:24px;}
.zig{
  display:grid;grid-template-columns:1fr;gap:20px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:20px;box-shadow:var(--sh1);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.zig:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(109,59,245,.2);}
@media (min-width:768px){
  .zig{grid-template-columns:.92fr 1.08fr;gap:26px;padding:24px;align-items:center;scroll-margin-top:96px;}
  .zig:nth-of-type(even){grid-template-columns:1.08fr .92fr;}
  .zig:nth-of-type(even) .zig-media{order:2;}
}
.zig-media{border-radius:20px;overflow:hidden;background:var(--soft);}
.zig-media img{width:100%;aspect-ratio:16/11;object-fit:cover;loading:lazy;}
.zig-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:32px;height:32px;border-radius:50%;background:var(--grad);color:#fff;
  font-size:14px;font-weight:800;font-variant-numeric:tabular-nums;margin-bottom:14px;
  box-shadow:0 10px 22px -12px rgba(109,59,245,.85);
}
.zig-body h3{font-size:21px;font-weight:700;color:var(--ink);margin-bottom:12px;}
.zig-body p{font-size:15px;line-height:1.9;color:var(--ink2);margin-bottom:10px;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}

/* ============ checklist ============ */
.check-grid{display:grid;grid-template-columns:1fr;gap:24px;}
@media (min-width:1024px){ .check-grid{grid-template-columns:8fr 4fr;gap:28px;} }
.card-l{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--sh1);
}
.card-l h2{font-size:clamp(24px,2.8vw,30px);font-weight:800;margin-bottom:8px;}
.card-l .lead{font-size:15px;color:var(--ink2);margin-bottom:20px;}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;padding:14px 0;border-bottom:1px dashed var(--line2);
  font-size:15px;color:var(--ink2);line-height:1.85;
}
.check-list li:last-child{border-bottom:0;}
.check-list .tick{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;margin-top:4px;
  background:#E8FBF8;color:#0B8C7C;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;
}
.data-card{
  background:linear-gradient(160deg,#F3F0FF 0%,#FFFFFF 100%);
  border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh1);
}
.data-card h3{font-size:17px;font-weight:700;margin-bottom:16px;}
.data-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.data-cell{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);padding:14px;
}
.data-cell b{display:block;font-size:22px;font-weight:800;color:#0B8C7C;font-variant-numeric:tabular-nums;line-height:1.2;}
.data-cell span{font-size:12px;color:var(--ink3);font-weight:600;}

/* ============ steps ============ */
.steps{position:relative;display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:768px){ .steps{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .steps{grid-template-columns:repeat(4,1fr);gap:24px;} }
@media (min-width:1024px){
  .steps::before{
    content:"";position:absolute;left:6%;right:6%;top:24px;height:1px;
    background-image:linear-gradient(90deg,rgba(109,59,245,.5) 0 8px,transparent 8px 16px);
    background-size:16px 1px;background-repeat:repeat-x;
  }
}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh1);transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(109,59,245,.2);}
.step .step-num{
  display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;
  border-radius:50%;background:var(--grad);color:#fff;font-size:14px;font-weight:800;
  font-variant-numeric:tabular-nums;margin-bottom:14px;position:relative;z-index:1;
  box-shadow:0 10px 22px -12px rgba(109,59,245,.85);
}
.step h4{font-size:17px;font-weight:700;margin-bottom:8px;}
.step p{font-size:14px;line-height:1.85;color:var(--ink2);}

/* ============ related ============ */
.related{
  background:var(--soft);border:1px solid #E7E0FF;border-radius:var(--r-lg);padding:26px;
}
.related h2{font-size:20px;font-weight:800;margin-bottom:16px;}
.related-list li + li{margin-top:12px;}
.related-list a{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
  padding:16px 18px;transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.related-list a:hover{transform:translateY(-3px);box-shadow:var(--sh1);border-color:rgba(109,59,245,.25);}
.related-list .rl-title{font-size:15px;font-weight:700;color:var(--ink);}
.related-list .rl-desc{font-size:13px;color:var(--ink3);margin-top:4px;}
.related-list .rl-arrow{color:var(--brand);flex:0 0 auto;transition:transform var(--t);}
.related-list a:hover .rl-arrow{transform:translateX(4px);}

/* ============ faq ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:920px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;
  transition:border-color var(--t),box-shadow var(--t);
}
.faq-item[open]{border-color:rgba(109,59,245,.28);box-shadow:var(--sh1);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;
  padding:18px 20px;font-size:17px;font-weight:700;color:var(--ink);position:relative;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";margin-left:auto;font-size:20px;font-weight:700;color:var(--brand);
  transition:transform var(--t);line-height:1;
}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;
  background:var(--grad);opacity:0;transition:opacity var(--t);
}
.faq-item[open] summary::before{opacity:1;}
.faq-item .q-mark{
  flex:0 0 auto;width:20px;height:20px;border-radius:50%;border:1.5px solid var(--accent);
  color:var(--accent);font-size:12px;font-weight:800;display:flex;align-items:center;justify-content:center;
}
.faq-item .ans{padding:0 20px 20px 52px;font-size:15px;line-height:1.9;color:var(--ink2);}

/* ============ cta band ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--deep);border-radius:32px;
  padding:34px 26px;display:grid;grid-template-columns:1fr;gap:24px;align-items:center;
}
@media (min-width:1024px){
  .cta-band{grid-template-columns:1fr auto;padding:46px 48px;gap:40px;}
}
.cta-band::before{
  content:"";position:absolute;left:-80px;top:-120px;width:360px;height:360px;border-radius:50%;
  background:var(--grad);opacity:.28;filter:blur(80px);pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;right:20px;bottom:-30px;width:180px;height:140px;
  background-image:radial-gradient(rgba(255,255,255,.28) 1px,transparent 1px);
  background-size:12px 12px;opacity:.5;pointer-events:none;
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,32px);font-weight:800;position:relative;z-index:1;}
.cta-band p{color:rgba(255,255,255,.72);font-size:15px;margin-top:10px;position:relative;z-index:1;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:1;}

/* ============ footer ============ */
.site-footer{
  margin-top:64px;background:var(--deep);color:rgba(255,255,255,.65);
  border-radius:32px 32px 0 0;padding:56px 0 28px;
}
@media (min-width:1024px){ .site-footer{margin-top:96px;padding:64px 0 30px;} }
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;}
@media (min-width:768px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:1.3fr 1fr 1fr 1fr;gap:40px;} }

.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand b{color:#fff;font-size:17px;font-weight:800;}
.footer-brand i{font-style:normal;font-size:12px;color:rgba(255,255,255,.5);}
.footer-intro{font-size:14px;line-height:1.85;color:rgba(255,255,255,.65);max-width:340px;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social a{
  display:inline-flex;align-items:center;justify-content:center;height:34px;padding:0 16px;
  border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
  color:#fff;font-size:13px;font-weight:600;transition:background var(--t),color var(--t),transform var(--t);
}
.footer-social a:hover{background:rgba(15,205,184,.16);color:var(--accent);transform:translateY(-2px);}

.site-footer h4{color:rgba(255,255,255,.92);font-size:15px;font-weight:700;margin-bottom:16px;}
.footer-links li + li{margin-top:10px;}
.footer-links a,.footer-bottom a{
  font-size:14px;color:rgba(255,255,255,.65);transition:color var(--t),transform var(--t);display:inline-block;
}
.footer-links a:hover,.footer-bottom a:hover{color:var(--accent);transform:translateX(3px);}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.65);margin-bottom:10px;line-height:1.8;}
.footer-contact span{
  display:inline-block;min-width:64px;color:rgba(255,255,255,.42);font-size:13px;
}
.footer-bottom{
  margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom .legal{display:flex;gap:18px;flex-wrap:wrap;}

/* ============ back to top ============ */
#toTop{
  position:fixed;right:20px;bottom:24px;z-index:65;
  width:48px;height:48px;border-radius:50%;border:0;cursor:pointer;
  background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:0 16px 30px -14px rgba(109,59,245,.85);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity var(--t),visibility var(--t),transform var(--t);
}
#toTop.show{opacity:1;visibility:visible;transform:translateY(0);}
#toTop:hover{filter:brightness(1.06);transform:translateY(-3px);}

/* ============ reveal ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.3,1);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
  *{animation:none !important;transition-duration:.01ms !important;}
}

.section-head{margin-bottom:32px;}
.section-head h2{font-size:clamp(24px,2.8vw,34px);font-weight:800;letter-spacing:-.01em;}
.section-head p{margin-top:10px;font-size:15px;color:var(--ink2);max-width:680px;}

@media (max-width:520px){
  .hero-panel{border-radius:24px;padding:22px 16px 26px;}
  .zig{border-radius:22px;padding:16px;}
  .card-l{padding:20px;}
  .cta-band{border-radius:24px;padding:26px 20px;}
}

/* roulang page: category2 */
:root{
  --brand:#6D3BF5;
  --brand2:#A83BF0;
  --brand3:#FF5F7E;
  --accent:#0FCDB8;
  --hot:#FF6A2B;
  --bg:#F7F6FB;
  --card:#FFFFFF;
  --ink:#14122A;
  --ink2:#5A5772;
  --ink3:#8B88A3;
  --body:#3A3750;
  --line:#ECE9F8;
  --line2:#E4E0F5;
  --grad:linear-gradient(120deg,#6D3BF5 0%,#A83BF0 48%,#FF5F7E 100%);
  --sh1:0 1px 2px rgba(20,18,42,.04), 0 10px 26px -14px rgba(109,59,245,.20);
  --sh2:0 22px 44px -18px rgba(109,59,245,.38);
  --r-xl:28px;
  --r-lg:20px;
  --r-md:16px;
}

*,*::before,*::after{box-sizing:border-box;}
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--bg);
  color:var(--body);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  overflow-x:hidden;
}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:3px solid rgba(109,59,245,.35);outline-offset:2px;border-radius:8px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
@media (max-width:768px){ .container{padding:0 20px;} }

.num,.badge-num,.stat-num{font-variant-numeric:tabular-nums;}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;height:72px;
  display:flex;align-items:center;
  background:rgba(247,246,251,.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease,border-color .25s ease,background .25s ease;
}
.site-header.is-scrolled{
  box-shadow:0 10px 30px -18px rgba(20,18,42,.35);
  border-color:#E2DDF5;
  background:rgba(247,246,251,.95);
}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;width:100%;}

.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:14px;line-height:1;flex-shrink:0;
  box-shadow:0 6px 16px -6px rgba(109,59,245,.7);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:16px;font-weight:800;color:var(--ink);letter-spacing:-.01em;}
.brand-text i{font-size:12px;font-style:normal;color:var(--ink3);}

.main-nav{display:flex;align-items:center;gap:26px;}
.main-nav a{
  position:relative;font-size:16px;font-weight:600;color:var(--ink2);
  padding:6px 0;transition:color .2s ease;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;bottom:-2px;height:3px;width:100%;border-radius:3px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;
  transition:transform .22s cubic-bezier(.2,.7,.3,1);
}
.main-nav a:hover{color:var(--brand);}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1);}
.main-nav a.active{color:var(--brand);}

.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0;}

.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 18px;border-radius:14px;
  background:#fff;border:1.5px solid var(--line2);color:var(--brand);
  font-size:15px;font-weight:600;
  transition:background .22s ease,border-color .22s ease,transform .22s ease;
}
.btn-ghost:hover{background:#F3F0FF;border-color:var(--brand);}
.btn-ghost:active{transform:translateY(0);}

.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:999px;
  background:var(--grad);color:#fff;font-size:15px;font-weight:700;
  box-shadow:var(--sh1);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease,filter .22s ease;
  white-space:nowrap;
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:var(--sh2);}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-primary svg{flex-shrink:0;}

.nav-toggle{
  display:none;width:44px;height:44px;border-radius:14px;
  background:#fff;border:1.5px solid var(--line2);
  align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .2s ease,background .2s ease;
}
.nav-toggle:hover{border-color:var(--brand);background:#F3F0FF;}
.nav-toggle span{position:relative;display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
  transition:transform .2s ease;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ============ 移动抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,18,42,.45);
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;z-index:90;
}
.drawer-mask.show{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:86vw;max-width:360px;
  background:#fff;border-radius:24px 0 0 24px;z-index:95;
  transform:translateX(100%);transition:transform .3s cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;padding:20px;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line);}
.drawer-head span{font-size:15px;font-weight:700;color:var(--ink);}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink2);font-size:22px;line-height:1;cursor:pointer;
}
.drawer-close:hover{border-color:var(--brand);color:var(--brand);}
.drawer-nav{display:flex;flex-direction:column;gap:6px;padding:16px 0;flex:1;overflow-y:auto;}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;
  min-height:48px;padding:0 14px;border-radius:14px;
  font-size:16px;font-weight:600;color:var(--ink2);background:#FAF9FE;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.drawer-nav a:hover,.drawer-nav a.active{background:#F3F0FF;color:var(--brand);transform:translateX(3px);}
.drawer-cta{width:100%;}

/* ============ 面包屑 ============ */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink3);}
.breadcrumb a{color:var(--ink3);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#C7C3DA;}
.breadcrumb .current{color:var(--brand);font-weight:600;}

/* ============ 分类 Hero ============ */
.cat-hero-wrap{padding:32px 0 0;}
.cat-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(160deg,#F3F0FF 0%,#FFFFFF 72%);
  border:1px solid var(--line);
  border-radius:32px;
  padding:40px;
  display:grid;grid-template-columns:1.35fr 1fr;gap:36px;align-items:center;
  box-shadow:var(--sh1);
}
.cat-hero::before{
  content:"";position:absolute;width:340px;height:340px;border-radius:50%;
  background:var(--grad);opacity:.14;filter:blur(90px);
  top:-120px;right:-60px;pointer-events:none;
}
.cat-hero-text{position:relative;z-index:2;}
.hero-title{
  margin-top:16px;
  font-size:clamp(30px,4.4vw,52px);line-height:1.15;font-weight:800;
  letter-spacing:-.02em;color:var(--ink);
}
.hero-title em{
  font-style:normal;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{margin-top:14px;font-size:16px;line-height:1.85;color:var(--ink2);max-width:520px;}
.hero-badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  height:34px;padding:0 14px;border-radius:999px;
  font-size:12px;font-weight:600;white-space:nowrap;
}
.badge .badge-num{font-size:22px;font-weight:800;line-height:1;}
.badge-accent{background:#E8FBF8;color:#0B9C8D;}
.badge-hot{background:#FFF1E8;color:#D9551C;}
.badge-plain{background:#F3F0FF;color:var(--brand);}

.cat-hero-media{position:relative;z-index:2;}
.cat-hero-media img{
  width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:24px;box-shadow:var(--sh1);
}
.cat-hero-media::after{
  content:"";position:absolute;inset:0;border-radius:24px;
  background:linear-gradient(180deg,rgba(109,59,245,.18) 0%,rgba(20,18,42,0) 55%);
  pointer-events:none;
}

/* ============ 通用板块 ============ */
.section{padding:64px 0 0;}
.section-pad{padding:96px 0 0;}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px;flex-wrap:wrap;}
.sec-title{font-size:clamp(24px,2.8vw,34px);line-height:1.25;font-weight:800;color:var(--ink);letter-spacing:-.01em;}
.sec-desc{margin-top:10px;font-size:15px;line-height:1.85;color:var(--ink2);max-width:680px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand);transition:color .2s ease;
}
.text-link:hover{color:var(--hot);}
.text-link span{transition:transform .22s cubic-bezier(.2,.7,.3,1);display:inline-block;}
.text-link:hover span{transform:translateX(4px);}

/* ============ Bento 网格 ============ */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.bento-a{grid-column:span 8;}
.bento-b{grid-column:span 4;}
.bento-c,.bento-d,.bento-e{grid-column:span 4;}

.card-l{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-xl);
  padding:32px;box-shadow:var(--sh1);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease,border-color .22s ease;
}
.card-l:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(109,59,245,.25);}

.card-s{
  background:#F3F0FF;border:1px solid #E7E1FF;border-radius:var(--r-lg);
  padding:26px;
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease;
}
.card-s:hover{transform:translateY(-4px);box-shadow:var(--sh1);}

.icon-badge{
  width:40px;height:40px;border-radius:10px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;color:#fff;
  box-shadow:0 10px 22px -12px rgba(109,59,245,.8);
}
.icon-line{
  width:40px;height:40px;border-radius:10px;background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--brand);
  border:1px solid #E2DBFF;
}

.card-title{font-size:21px;font-weight:700;color:var(--ink);line-height:1.4;margin-top:18px;}
.card-sub{margin-top:10px;font-size:15px;line-height:1.85;color:var(--ink2);}

.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.chip{
  display:inline-flex;align-items:center;height:30px;padding:0 12px;
  border-radius:999px;background:#F3F0FF;color:var(--brand);
  font-size:13px;font-weight:600;
  transition:background .2s ease,color .2s ease;
}
.chip:hover{background:var(--brand);color:#fff;}

.card-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:24px;}

/* 数据卡 */
.data-card{
  background:#FFFFFF;border:1px solid var(--line);border-radius:var(--r-xl);
  padding:28px;box-shadow:var(--sh1);
}
.data-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px;}
.data-item{
  background:#FAF9FE;border:1px solid #EFEBFB;border-radius:var(--r-md);
  padding:16px 14px;
}
.data-item .badge-num{font-size:26px;font-weight:800;color:#0B9C8D;line-height:1.1;font-variant-numeric:tabular-nums;}
.data-item small{display:block;font-size:12px;color:var(--ink3);margin-top:4px;}

/* 图卡 */
.img-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);
  overflow:hidden;box-shadow:var(--sh1);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease;
}
.img-card:hover{transform:translateY(-4px);box-shadow:var(--sh2);}
.img-card img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.img-card .img-body{padding:20px;}

/* 要点列表卡 */
.list-card{
  background:#FBFAFF;border:1px solid var(--line);border-radius:var(--r-xl);
  padding:28px;box-shadow:var(--sh1);
}
.list-card h3{font-size:17px;font-weight:700;color:var(--ink);}
.point-list{margin-top:16px;display:flex;flex-direction:column;gap:12px;}
.point-list li{
  display:flex;gap:10px;font-size:15px;line-height:1.85;color:var(--ink2);
}
.point-list li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);
  flex-shrink:0;margin-top:11px;
}

/* ============ 玩法分区（非对称两栏） ============ */
.split{display:grid;grid-template-columns:6fr 6fr;gap:24px;align-items:stretch;}
.split .media{border-radius:var(--r-xl);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh1);}
.split .media img{width:100%;height:100%;min-height:280px;object-fit:cover;}
.split .text{padding:32px;background:#fff;border:1px solid var(--line);border-radius:var(--r-xl);box-shadow:var(--sh1);}

.mode-list{margin-top:20px;display:grid;gap:14px;}
.mode-list li{
  display:flex;gap:14px;align-items:flex-start;
  padding:14px 16px;border-radius:var(--r-md);background:#FAF9FE;border:1px solid #EFEBFB;
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.mode-list li:hover{background:#F3F0FF;border-color:#DDD5FF;transform:translateX(3px);}
.mode-num{
  width:28px;height:28px;border-radius:9px;background:var(--grad);color:#fff;
  font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.mode-list b{display:block;font-size:15px;color:var(--ink);font-weight:700;}
.mode-list span{font-size:14px;color:var(--ink2);line-height:1.8;}

/* ============ 步骤流程 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;}
.steps::before{
  content:"";position:absolute;top:34px;left:6%;right:6%;height:1px;
  background-image:linear-gradient(90deg,rgba(109,59,245,.45) 0 8px,rgba(0,0,0,0) 8px 16px);
  background-size:16px 1px;background-repeat:repeat-x;
}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh1);z-index:1;
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--sh2);}
.step-num{
  width:32px;height:32px;border-radius:50%;background:var(--grad);color:#fff;
  font-size:14px;font-weight:800;display:flex;align-items:center;justify-content:center;
  margin-bottom:14px;box-shadow:0 10px 20px -12px rgba(109,59,245,.9);
}
.step h4{font-size:17px;font-weight:700;color:var(--ink);}
.step p{margin-top:8px;font-size:15px;line-height:1.85;color:var(--ink2);}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;}
.faq-item{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;
  box-shadow:var(--sh1);overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--grad);transform:scaleY(0);transform-origin:top;
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
}
.faq-item[open]::before{transform:scaleY(1);}
.faq-item[open]{border-color:rgba(109,59,245,.25);box-shadow:var(--sh2);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;
  padding:20px 24px;font-size:17px;font-weight:700;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-mark{
  width:20px;height:20px;flex-shrink:0;color:var(--accent);transition:transform .28s cubic-bezier(.2,.7,.3,1);
}
.faq-item[open] .faq-mark{transform:rotate(45deg);}
.faq-answer{padding:0 24px 22px 56px;font-size:15px;line-height:1.9;color:var(--ink2);}

/* ============ 延伸入口 ============ */
.reading{background:#FBFAFF;border:1px solid var(--line);border-radius:var(--r-xl);padding:28px;box-shadow:var(--sh1);}
.reading-list{margin-top:16px;display:flex;flex-direction:column;gap:12px;}
.reading-list a{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 18px;border-radius:var(--r-md);background:#fff;border:1px solid var(--line);
  font-size:15px;font-weight:600;color:var(--ink);
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.reading-list a:hover{border-color:rgba(109,59,245,.3);background:#F3F0FF;transform:translateX(3px);}
.reading-list a span{color:var(--brand);transition:transform .22s cubic-bezier(.2,.7,.3,1);}
.reading-list a:hover span{transform:translateX(4px);}

/* ============ 底部 CTA 通栏 ============ */
.cta-band{
  position:relative;overflow:hidden;
  background:#14122A;border-radius:32px;padding:48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  box-shadow:0 30px 60px -30px rgba(20,18,42,.7);
}
.cta-band::before{
  content:"";position:absolute;width:420px;height:420px;border-radius:50%;
  background:var(--grad);opacity:.28;filter:blur(110px);top:-180px;right:-80px;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.14) 1px,transparent 1px);
  background-size:22px 22px;opacity:.5;pointer-events:none;
}
.cta-band > *{position:relative;z-index:2;}
.cta-band h2{font-size:clamp(22px,2.6vw,32px);font-weight:800;color:#fff;line-height:1.3;letter-spacing:-.01em;}
.cta-band p{margin-top:10px;font-size:15px;line-height:1.85;color:rgba(255,255,255,.72);max-width:520px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}
.btn-outline-light{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 22px;border-radius:14px;
  background:rgba(255,255,255,.06);border:1.5px solid rgba(255,255,255,.35);
  color:#fff;font-size:15px;font-weight:600;
  transition:background .22s ease,border-color .22s ease,transform .22s ease;
}
.btn-outline-light:hover{background:rgba(255,255,255,.14);border-color:#fff;transform:translateY(-2px);}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:96px;
  background:#14122A;color:rgba(255,255,255,.65);
  border-radius:32px 32px 0 0;
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:2fr 1.2fr 1fr 1.4fr;gap:32px;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;flex-wrap:wrap;}
.footer-brand b{font-size:16px;font-weight:800;}
.footer-brand i{font-size:12px;font-style:normal;color:rgba(255,255,255,.5);}
.footer-intro{margin-top:14px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px;}
.footer-social{display:flex;gap:10px;margin-top:18px;}
.footer-social a{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.8);font-size:13px;font-weight:600;
  transition:background .2s ease,color .2s ease,transform .2s ease;
}
.footer-social a:hover{background:rgba(15,205,184,.18);color:var(--accent);transform:translateY(-2px);}
.site-footer h4{font-size:15px;font-weight:700;color:rgba(255,255,255,.9);margin-bottom:16px;}
.footer-links li,.footer-contact li{margin-bottom:12px;font-size:14px;}
.footer-links a{color:rgba(255,255,255,.65);transition:color .2s ease,transform .2s ease;display:inline-block;}
.footer-links a:hover{color:var(--accent);transform:translateX(3px);}
.footer-contact li{color:rgba(255,255,255,.6);line-height:1.7;}
.footer-contact span{
  display:block;font-size:12px;color:rgba(255,255,255,.4);margin-bottom:2px;
}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom .legal{display:flex;gap:18px;flex-wrap:wrap;}
.footer-bottom .legal a{color:rgba(255,255,255,.5);transition:color .2s ease;}
.footer-bottom .legal a:hover{color:var(--accent);}

/* ============ 返回顶部 ============ */
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--grad);color:#fff;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;z-index:70;
  box-shadow:var(--sh2);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .28s ease,visibility .28s ease,transform .28s ease,filter .2s ease;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0);}
.to-top:hover{filter:brightness(1.08);}

/* ============ 入场动画 ============ */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.3,1);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
  *{transition:none !important;animation:none !important;}
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .main-nav{display:none;}
  .nav-actions .btn-ghost{display:none;}
  .nav-toggle{display:flex;}
  .cat-hero{grid-template-columns:1fr;padding:32px;}
  .bento-a{grid-column:span 12;}
  .bento-b{grid-column:span 12;}
  .bento-c,.bento-d,.bento-e{grid-column:span 6;}
  .split{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .steps::before{display:none;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:768px){
  .section{padding:48px 0 0;}
  .section-pad{padding:64px 0 0;}
  .cat-hero{padding:26px 22px;border-radius:26px;}
  .card-l,.card-s,.data-card,.list-card,.reading{padding:22px;}
  .split .text{padding:24px;}
  .cta-band{padding:32px 24px;border-radius:26px;}
  .bento-c,.bento-d,.bento-e{grid-column:span 12;}
  .data-grid{grid-template-columns:1fr 1fr;}
  .drawer-nav a{font-size:15px;}
}
@media (max-width:520px){
  .brand-text i{display:none;}
  .hero-title{font-size:30px;}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .cta-actions{width:100%;}
  .cta-actions .btn-primary,.cta-actions .btn-outline-light{width:100%;}
  .data-grid{grid-template-columns:1fr 1fr;}
  .faq-item summary{padding:18px 18px;font-size:16px;}
  .faq-answer{padding:0 18px 20px 46px;}
  .to-top{right:16px;bottom:16px;}
}

/* roulang page: category3 */
:root{
  --brand:#6D3BF5; --brand-deep:#4E22C9; --brand-soft:#F3F0FF;
  --accent:#0FCDB8; --accent-soft:#E8FBF8;
  --hot:#FF6A2B; --hot-soft:#FFF1E8;
  --grad:linear-gradient(120deg,#6D3BF5 0%,#A83BF0 48%,#FF5F7E 100%);
  --bg:#F7F6FB; --card:#FFFFFF;
  --ink:#14122A; --ink-2:#5A5772; --ink-3:#8B88A3; --body:#3A3750;
  --line:#ECE9F8; --line-2:#E4E0F5;
  --r-lg:28px; --r-md:20px; --r-sm:16px;
  --sh-1:0 1px 2px rgba(20,18,42,.04), 0 10px 26px -14px rgba(109,59,245,.20);
  --sh-2:0 22px 44px -18px rgba(109,59,245,.38);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);
  font-size:16px;line-height:1.9;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-md);object-fit:cover}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(109,59,245,.35);outline-offset:2px;border-radius:8px}
.num{font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.sec{padding:96px 0}
.sec-tight{padding:64px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.sec-head h2{font-size:clamp(24px,2.8vw,34px);line-height:1.25;font-weight:800;letter-spacing:-.01em}
.sec-head p{margin-top:10px;color:var(--ink-2);font-size:15px;max-width:640px;line-height:1.85}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:6px 14px}
.divider-grad{height:1px;background:linear-gradient(90deg,rgba(109,59,245,.45),rgba(255,95,126,0) 85%)}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,246,251,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);transition:box-shadow .25s ease,border-color .25s ease;
}
.site-header.is-scrolled{box-shadow:0 14px 34px -24px rgba(20,18,42,.55);border-color:#E2DEF5}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;min-height:44px}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:13px;line-height:1;flex:none;
  box-shadow:0 8px 18px -10px rgba(109,59,245,.7);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text b{font-size:17px;font-weight:800;letter-spacing:-.01em}
.brand-text i{font-style:normal;font-size:12px;color:var(--ink-3);font-weight:500}
.main-nav{display:flex;align-items:center;gap:26px}
.main-nav a{
  position:relative;font-size:17px;font-weight:600;color:var(--ink-2);
  padding:6px 2px;min-height:44px;display:inline-flex;align-items:center;transition:color .2s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:4px;height:3px;border-radius:3px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform .24s cubic-bezier(.2,.7,.3,1);
}
.main-nav a:hover{color:var(--brand)}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1)}
.main-nav a.active{color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 24px;border-radius:999px;background:var(--grad);color:#fff;
  font-size:15px;font-weight:700;letter-spacing:.01em;
  box-shadow:0 14px 28px -16px rgba(109,59,245,.75);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease,filter .22s ease;
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);filter:brightness(.96)}
.btn-primary:disabled,.btn-ghost:disabled{opacity:.4;cursor:not-allowed}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:14px;background:#fff;color:var(--brand);
  border:1.5px solid var(--line-2);font-size:15px;font-weight:600;
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.btn-ghost:hover{border-color:var(--brand);background:var(--brand-soft);transform:translateY(-2px)}
.btn-solid-lg{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:52px;padding:0 30px;border-radius:999px;background:var(--grad);color:#fff;
  font-size:16px;font-weight:700;box-shadow:0 18px 34px -18px rgba(109,59,245,.8);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),filter .22s ease,box-shadow .22s ease;
}
.btn-solid-lg:hover{transform:translateY(-2px);filter:brightness(1.06);box-shadow:var(--sh-2)}
.btn-outline-dark{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:52px;padding:0 28px;border-radius:999px;background:transparent;color:#fff;
  border:1.5px solid rgba(255,255,255,.4);font-size:16px;font-weight:600;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-outline-dark:hover{background:rgba(255,255,255,.1);border-color:#fff;transform:translateY(-2px)}
.text-link{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-size:15px;font-weight:600;min-height:44px}
.text-link svg{transition:transform .22s ease}
.text-link:hover svg{transform:translateX(4px)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:14px;border:1.5px solid var(--line-2);background:#fff;position:relative}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:12px;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:.25s ease;
}
.nav-toggle span{top:21px}
.nav-toggle span::before,.nav-toggle span::after{content:"";left:0}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,18,42,.45);opacity:0;visibility:hidden;
  transition:opacity .28s ease,visibility .28s ease;z-index:90;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:86vw;max-width:360px;background:#fff;
  border-radius:24px 0 0 24px;z-index:100;padding:22px 22px 28px;display:flex;flex-direction:column;
  transform:translateX(102%);transition:transform .32s cubic-bezier(.2,.7,.3,1);
  box-shadow:-24px 0 60px -30px rgba(20,18,42,.5);overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{width:44px;height:44px;border-radius:14px;border:1.5px solid var(--line-2);font-size:20px;color:var(--ink-2);line-height:1}
.drawer h3{font-size:13px;font-weight:700;color:var(--ink-3);letter-spacing:.08em;margin-bottom:10px}
.drawer-nav{display:flex;flex-direction:column;gap:8px;margin-bottom:22px}
.drawer-nav a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  min-height:48px;padding:0 16px;border-radius:16px;background:var(--brand-soft);
  color:var(--ink);font-size:16px;font-weight:600;
}
.drawer-nav a.active{background:var(--grad);color:#fff}
.drawer .btn-primary{width:100%;height:52px;margin-top:auto}

/* ---------- hero ---------- */
.hero-sec{padding:44px 0 6px}
.hero-card{
  position:relative;overflow:hidden;border-radius:32px;border:1px solid var(--line);
  background:linear-gradient(160deg,#F3F0FF 0%,#FFFFFF 72%);
  padding:46px 48px;display:grid;grid-template-columns:1.12fr .88fr;gap:44px;align-items:center;
}
.hero-card::after{
  content:"";position:absolute;width:420px;height:420px;right:-120px;top:-160px;border-radius:50%;
  background:var(--grad);filter:blur(120px);opacity:.16;pointer-events:none;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-3);margin-bottom:18px;position:relative;z-index:1}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C9C5DE}
.breadcrumb .cur{color:var(--brand);font-weight:600}
.hero-card h1{
  font-size:clamp(30px,4.2vw,48px);line-height:1.16;font-weight:800;letter-spacing:-.02em;
  position:relative;z-index:1;
}
.hero-sub{margin-top:18px;font-size:16px;color:var(--body);line-height:1.9;max-width:520px;position:relative;z-index:1}
.hero-meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;position:relative;z-index:1}
.badge{
  display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 16px;border-radius:999px;
  font-size:12px;font-weight:600;background:var(--accent-soft);color:#0A8E80;
}
.badge.hot{background:var(--hot-soft);color:#C24A12}
.badge b{font-size:22px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;position:relative;z-index:1}
.hero-figure{position:relative;z-index:1}
.hero-figure img{width:100%;aspect-ratio:16/11;border-radius:var(--r-lg);box-shadow:var(--sh-1)}
.hero-float{
  position:absolute;left:-18px;bottom:26px;background:#fff;border:1px solid var(--line);
  border-radius:18px;padding:14px 18px;box-shadow:var(--sh-1);max-width:240px;
}
.hero-float strong{display:block;font-size:22px;font-weight:800;color:var(--accent);font-variant-numeric:tabular-nums}
.hero-float span{font-size:12px;color:var(--ink-3)}

/* ---------- timeline ---------- */
.timeline-scroll{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;position:relative}
.timeline-scroll::before{
  content:"";position:absolute;top:30px;left:24px;right:24px;height:1px;
  background:repeating-linear-gradient(90deg,rgba(109,59,245,.45) 0 8px,transparent 8px 16px);
}
.tl-item{
  position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 22px 22px;box-shadow:var(--sh-1);transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease,border-color .22s ease;
  z-index:1;
}
.tl-item:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(109,59,245,.35)}
.tl-num{
  width:44px;height:44px;border-radius:50%;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:800;
  font-variant-numeric:tabular-nums;box-shadow:0 12px 24px -14px rgba(109,59,245,.9);
}
.tl-item h3{margin-top:16px;font-size:21px;font-weight:700;line-height:1.4}
.tl-item p{margin-top:10px;font-size:15px;line-height:1.85;color:var(--ink-2)}
.tl-item img{width:100%;aspect-ratio:16/10;margin-top:16px}
.tl-tag{display:inline-block;margin-top:14px;font-size:12px;font-weight:600;color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:5px 12px}

/* ---------- bento ---------- */
.bento{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.b-8{grid-column:span 8}
.b-4{grid-column:span 4}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:30px;
  box-shadow:var(--sh-1);transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:rgba(109,59,245,.3)}
.card-soft{background:var(--brand-soft);border-color:#E7E1FF}
.card h3{font-size:21px;font-weight:700;line-height:1.4}
.card p{margin-top:12px;font-size:15px;line-height:1.85;color:var(--ink-2)}
.icon-sq{
  width:44px;height:44px;border-radius:12px;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:800;margin-bottom:18px;
}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.chip{
  display:inline-flex;align-items:center;height:32px;padding:0 14px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;
}
.chip-accent{background:var(--accent-soft);color:#0A8E80}
.stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:20px}
.stat-box{background:#FAF9FE;border:1px solid var(--line);border-radius:18px;padding:16px}
.stat-box strong{display:block;font-size:22px;font-weight:800;color:#0A8E80;font-variant-numeric:tabular-nums;line-height:1.2}
.stat-box span{font-size:12px;color:var(--ink-3)}
.lists{display:flex;flex-direction:column;gap:12px;margin-top:18px}
.lists li{display:flex;gap:10px;align-items:flex-start;font-size:15px;line-height:1.8;color:var(--ink-2)}
.lists li::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);flex:none;margin-top:11px;
}
.card-img img{width:100%;aspect-ratio:16/10;margin-bottom:18px}

/* ---------- related ---------- */
.related{background:#FAF9FE;border:1px solid var(--line);border-radius:var(--r-lg);padding:12px}
.link-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;border-radius:16px;transition:background .2s ease,transform .2s ease;
}
.link-row + .link-row{border-top:1px solid var(--line)}
.link-row:hover{background:#fff;transform:translateX(4px)}
.link-row b{display:block;font-size:16px;font-weight:700}
.link-row span{font-size:13px;color:var(--ink-3)}
.link-row svg{flex:none;color:var(--brand);transition:transform .22s ease}
.link-row:hover svg{transform:translateX(4px)}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:20px 24px;box-shadow:var(--sh-1);overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--grad);
  transform:scaleY(0);transform-origin:top;transition:transform .26s cubic-bezier(.2,.7,.3,1);
}
.faq-item[open]{border-color:rgba(109,59,245,.32);box-shadow:var(--sh-2)}
.faq-item[open]::before{transform:scaleY(1)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;gap:12px;
  font-size:17px;font-weight:700;line-height:1.6;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .q-icon{
  width:22px;height:22px;flex:none;border-radius:50%;border:1.5px solid var(--accent);color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;
}
.faq-item summary .arrow{
  margin-left:auto;flex:none;width:26px;height:26px;border-radius:50%;background:var(--brand-soft);
  color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
}
.faq-item[open] summary .arrow{transform:rotate(45deg)}
.faq-item p{margin-top:12px;font-size:15px;line-height:1.9;color:var(--ink-2)}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:32px;background:#14122A;color:#fff;
  padding:52px 54px;display:flex;align-items:center;justify-content:space-between;gap:36px;
}
.cta-band::before{
  content:"";position:absolute;width:460px;height:460px;left:-140px;bottom:-220px;border-radius:50%;
  background:var(--grad);filter:blur(120px);opacity:.35;
}
.cta-band::after{
  content:"";position:absolute;top:24px;right:38px;width:120px;height:80px;
  background-image:radial-gradient(rgba(255,255,255,.35) 1px,transparent 1px);
  background-size:12px 12px;opacity:.5;
}
.cta-band h2{font-size:clamp(24px,2.8vw,32px);font-weight:800;line-height:1.3;position:relative;z-index:1}
.cta-band p{margin-top:12px;font-size:16px;color:rgba(255,255,255,.72);max-width:520px;position:relative;z-index:1}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:1;flex:none}

/* ---------- footer ---------- */
.site-footer{margin-top:96px;background:#14122A;color:#fff;border-radius:32px 32px 0 0;padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand b{font-size:17px;font-weight:800}
.footer-brand i{font-style:normal;font-size:12px;color:rgba(255,255,255,.55)}
.footer-intro{font-size:14px;line-height:1.85;color:rgba(255,255,255,.65);max-width:300px}
.footer-social{display:flex;gap:10px;margin-top:18px}
.footer-social a{
  display:inline-flex;align-items:center;justify-content:center;height:36px;padding:0 16px;border-radius:999px;
  background:rgba(255,255,255,.1);font-size:13px;font-weight:600;color:#fff;transition:background .2s ease;
}
.footer-social a:hover{background:rgba(255,255,255,.2)}
.site-footer h4{font-size:15px;font-weight:700;color:rgba(255,255,255,.92);margin-bottom:16px}
.footer-links li + li,.footer-contact li + li{margin-top:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.65);display:inline-block;transition:color .2s ease,transform .2s ease}
.footer-links a:hover{color:var(--accent);transform:translateX(3px)}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.65);line-height:1.7}
.footer-contact span{display:block;font-size:12px;color:rgba(255,255,255,.42)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0 28px;font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom .legal{display:flex;gap:16px;flex-wrap:wrap}
.footer-bottom a{color:rgba(255,255,255,.5)}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- to top ---------- */
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .28s ease,visibility .28s ease,transform .28s ease;z-index:70;
}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{transition-duration:.01ms !important}
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding:0 24px}
  .main-nav,.nav-actions .btn-ghost,.nav-actions .btn-primary{display:none}
  .nav-toggle{display:block}
  .hero-card{grid-template-columns:1fr;padding:36px 32px;gap:28px}
  .hero-figure img{aspect-ratio:16/9}
  .hero-float{left:auto;right:14px;bottom:14px}
  .timeline-scroll{
    display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:18px;
    padding-bottom:14px;-webkit-overflow-scrolling:touch;
  }
  .timeline-scroll::before{display:none}
  .tl-item{flex:0 0 76%;scroll-snap-align:start}
  .b-8,.b-4{grid-column:span 12}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta-band{flex-direction:column;align-items:flex-start;padding:44px 36px}
}
@media (max-width:768px){
  .sec{padding:72px 0}
  .sec-tight{padding:52px 0}
  .sec-head{flex-direction:column;align-items:flex-start;margin-bottom:28px}
  .bento{gap:18px}
  .card{padding:24px}
  .tl-item{flex:0 0 86%}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .container{padding:0 20px}
  .nav-wrap{height:64px}
  .hero-card{padding:28px 22px;border-radius:26px}
  .hero-actions .btn-solid-lg,.hero-actions .btn-outline-dark{width:100%}
  .cta-band{padding:34px 24px;border-radius:26px}
  .cta-actions{width:100%}
  .cta-actions a{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .timeline-scroll{display:block;overflow:visible;padding-left:26px;position:relative}
  .timeline-scroll::before{
    display:block;content:"";position:absolute;left:8px;top:12px;bottom:12px;right:auto;width:2px;height:auto;
    background:linear-gradient(180deg,rgba(109,59,245,.55),rgba(255,95,126,.15));
  }
  .tl-item{width:100%;margin-bottom:16px}
  .tl-item:last-child{margin-bottom:0}
  .to-top{right:16px;bottom:16px}
}

/* roulang page: category4 */
:root{
  --brand:#6D3BF5;
  --brand-deep:#4B22C9;
  --brand-soft:#F3F0FF;
  --accent:#0FCDB8;
  --accent-soft:#E8FBF8;
  --hot:#FF6A2B;
  --hot-soft:#FFF1E8;
  --bg:#F7F6FB;
  --card:#FFFFFF;
  --ink:#14122A;
  --ink-sub:#5A5772;
  --ink-weak:#8B88A3;
  --body:#3A3750;
  --line:#ECE9F8;
  --line-strong:#E4E0F5;
  --grad:linear-gradient(120deg,#6D3BF5 0%,#A83BF0 48%,#FF5F7E 100%);
  --r-lg:28px;
  --r-md:20px;
  --r-sm:16px;
  --sh-1:0 1px 2px rgba(20,18,42,.04), 0 10px 26px -14px rgba(109,59,245,.20);
  --sh-2:0 22px 44px -18px rgba(109,59,245,.38);
  --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;
  background:var(--bg);
  color:var(--body);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  font-size:16px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; color:inherit; background:none; border:0; cursor:pointer; }
ul,ol{ list-style:none; margin:0; padding:0; }
h1,h2,h3,h4,p{ margin:0; }

:focus-visible{
  outline:3px solid rgba(109,59,245,.35);
  outline-offset:2px;
  border-radius:6px;
}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,246,251,.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease), border-color .25s var(--ease);
}
body.scrolled .site-header{
  box-shadow:0 10px 30px -18px rgba(20,18,42,.28);
  border-bottom-color:var(--line-strong);
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
}

.brand{ display:inline-flex; align-items:center; gap:10px; flex:0 0 auto; }
.brand-mark{
  width:28px; height:28px;
  border-radius:9px;
  background:var(--grad);
  color:#fff;
  display:inline-flex; align-items:center; justify-content:center;
  font-size:14px; line-height:1;
  box-shadow:0 6px 16px -8px rgba(109,59,245,.85);
  flex:0 0 auto;
}
.brand-text{ display:flex; flex-direction:column; line-height:1.15; }
.brand-text b{ font-size:17px; font-weight:800; color:var(--ink); letter-spacing:-.01em; }
.brand-text i{ font-style:normal; font-size:12px; color:var(--ink-weak); }

.main-nav{
  display:flex;
  align-items:center;
  gap:28px;
}
.main-nav a{
  position:relative;
  font-size:17px;
  font-weight:600;
  color:var(--ink-sub);
  padding:6px 2px;
  transition:color .2s var(--ease);
  white-space:nowrap;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0; right:0; bottom:0;
  height:3px;
  border-radius:3px;
  background:var(--grad);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.main-nav a:hover{ color:var(--brand); }
.main-nav a:hover::after{ transform:scaleX(1); }
.main-nav a.active{ color:var(--brand); }
.main-nav a.active::after{ transform:scaleX(1); }

.nav-actions{ display:flex; align-items:center; gap:12px; flex:0 0 auto; }

.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 24px;
  border-radius:999px;
  background:var(--grad);
  color:#fff;
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  box-shadow:0 10px 24px -12px rgba(109,59,245,.75);
  transition:transform .22s var(--ease), box-shadow .22s var(--ease), filter .22s var(--ease);
  white-space:nowrap;
}
.btn-primary:hover{
  transform:translateY(-2px);
  filter:brightness(1.06);
  box-shadow:var(--sh-2);
}
.btn-primary:active{ transform:translateY(0); filter:brightness(.96); }

.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 20px;
  border-radius:14px;
  background:#fff;
  border:1.5px solid var(--line-strong);
  color:var(--brand);
  font-size:15px;
  font-weight:700;
  transition:border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
  white-space:nowrap;
}
.btn-ghost:hover{
  border-color:var(--brand);
  background:var(--brand-soft);
  transform:translateY(-1px);
}

.nav-toggle{
  display:none;
  width:44px; height:44px;
  border-radius:14px;
  border:1.5px solid var(--line-strong);
  background:#fff;
  align-items:center;
  justify-content:center;
}
.nav-toggle span{
  position:relative;
  width:18px; height:2px;
  border-radius:2px;
  background:var(--ink);
  transition:background .2s var(--ease);
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:0;
  width:18px; height:2px;
  border-radius:2px;
  background:var(--ink);
  transition:transform .25s var(--ease);
}
.nav-toggle span::before{ top:-6px; }
.nav-toggle span::after{ top:6px; }
.site-header.open .nav-toggle span{ background:transparent; }
.site-header.open .nav-toggle span::before{ transform:translateY(6px) rotate(45deg); }
.site-header.open .nav-toggle span::after{ transform:translateY(-6px) rotate(-45deg); }

/* ============ 通用板块 ============ */
.section{ padding:88px 0; }
.section-tight{ padding:64px 0; }

.section-head{ max-width:760px; margin-bottom:40px; }
.section-head h2{
  font-size:clamp(24px,2.8vw,34px);
  line-height:1.25;
  font-weight:800;
  color:var(--ink);
  letter-spacing:-.02em;
}
.section-head p{
  margin-top:14px;
  font-size:16px;
  color:var(--ink-sub);
}

.grad-text{
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.chip{
  display:inline-flex;
  align-items:center;
  height:32px;
  padding:0 14px;
  border-radius:999px;
  background:var(--brand-soft);
  color:var(--brand);
  font-size:13px;
  font-weight:600;
  white-space:nowrap;
}

.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:36px;
  padding:0 15px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  white-space:nowrap;
}
.badge b{
  font-size:22px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.badge-accent{ background:var(--accent-soft); color:#0B8C7E; }
.badge-accent b{ color:var(--accent); }
.badge-hot{ background:var(--hot-soft); color:#C24A12; }
.badge-hot b{ color:var(--hot); }

.badge-row{ display:flex; flex-wrap:wrap; gap:10px; }

/* ============ 分类首屏 ============ */
.hero-cat{ padding:36px 0 0; }
.hero-cat-inner{
  position:relative;
  overflow:hidden;
  background:linear-gradient(158deg,#F3F0FF 0%,#FFFFFF 72%);
  border:1px solid var(--line);
  border-radius:32px;
  padding:52px;
  display:grid;
  grid-template-columns:1.35fr .85fr;
  gap:44px;
  align-items:center;
}
.hero-cat-inner::after{
  content:"";
  position:absolute;
  right:-120px; top:-140px;
  width:400px; height:400px;
  border-radius:50%;
  background:var(--grad);
  opacity:.14;
  filter:blur(90px);
  pointer-events:none;
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ink-weak);
  margin-bottom:18px;
}
.crumb a{ color:var(--ink-weak); transition:color .2s var(--ease); }
.crumb a:hover{ color:var(--brand); }
.crumb span{ color:var(--brand); font-weight:600; }

.hero-cat h1{
  font-size:clamp(30px,4vw,46px);
  line-height:1.15;
  font-weight:800;
  color:var(--ink);
  letter-spacing:-.02em;
}
.hero-sub{
  margin-top:18px;
  font-size:17px;
  color:var(--ink-sub);
  max-width:520px;
}
.hero-cat .badge-row{ margin-top:26px; }
.hero-cta{ display:flex; flex-wrap:wrap; gap:14px; margin-top:30px; }

.hero-media{ position:relative; }
.hero-media img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  border-radius:24px;
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.hero-float{
  position:absolute;
  right:-8px; bottom:-14px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:16px;
  padding:12px 16px;
  box-shadow:var(--sh-1);
  display:flex;
  align-items:center;
  gap:10px;
}
.hero-float b{
  font-size:22px;
  font-weight:800;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
  line-height:1;
}
.hero-float span{ font-size:12px; color:var(--ink-sub); }

/* ============ 问答分区 ============ */
.qa-list{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-1);
  overflow:hidden;
}
.qa-item{
  display:grid;
  grid-template-columns:1fr 260px;
  gap:40px;
  padding:40px 44px;
  border-bottom:1px solid var(--line);
  position:relative;
  transition:background .25s var(--ease);
}
.qa-item:last-child{ border-bottom:0; }
.qa-item::before{
  content:"";
  position:absolute;
  left:0; top:32px; bottom:32px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--grad);
  opacity:0;
  transition:opacity .25s var(--ease);
}
.qa-item:hover{ background:#FCFBFF; }
.qa-item:hover::before{ opacity:1; }

.qa-num{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:30px; height:30px;
  border-radius:50%;
  background:var(--grad);
  color:#fff;
  font-size:13px;
  font-weight:800;
  font-variant-numeric:tabular-nums;
  margin-bottom:14px;
}
.qa-main h3{
  font-size:21px;
  line-height:1.45;
  font-weight:700;
  color:var(--ink);
  margin-bottom:14px;
}
.qa-main p{
  font-size:15.5px;
  line-height:1.9;
  color:var(--body);
}
.qa-main p + p{ margin-top:14px; }

.qa-side{
  display:flex;
  flex-direction:column;
  gap:10px;
  align-content:flex-start;
  justify-content:center;
  border-left:1px dashed var(--line-strong);
  padding-left:32px;
}
.qa-side .badge{ align-self:flex-start; }

/* ============ 数值概览 ============ */
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.stat-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:26px 24px;
  box-shadow:var(--sh-1);
  transition:transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
}
.stat-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--sh-2);
  border-color:rgba(109,59,245,.35);
}
.stat-card b{
  display:block;
  font-size:30px;
  font-weight:800;
  line-height:1.1;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
}
.stat-card span{
  display:block;
  margin-top:8px;
  font-size:13px;
  font-weight:700;
  color:var(--ink);
}
.stat-card p{
  margin-top:10px;
  font-size:14px;
  line-height:1.8;
  color:var(--ink-sub);
}

/* ============ 延伸阅读 ============ */
.more-list{ display:flex; flex-direction:column; gap:14px; }
.more-item{
  display:flex;
  align-items:center;
  gap:18px;
  background:var(--brand-soft);
  border:1px solid transparent;
  border-radius:var(--r-md);
  padding:22px 26px;
  transition:background .22s var(--ease), transform .22s var(--ease), border-color .22s var(--ease);
}
.more-item:hover{
  background:#fff;
  border-color:rgba(109,59,245,.35);
  transform:translateY(-3px);
  box-shadow:var(--sh-1);
}
.more-tag{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  height:30px;
  padding:0 12px;
  border-radius:999px;
  background:#fff;
  color:var(--brand);
  font-size:12px;
  font-weight:700;
}
.more-title{
  flex:1 1 auto;
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  line-height:1.5;
}
.more-desc{
  display:block;
  margin-top:6px;
  font-size:14px;
  font-weight:400;
  color:var(--ink-sub);
}
.more-arrow{
  flex:0 0 auto;
  color:var(--brand);
  font-size:18px;
  transition:transform .22s var(--ease);
}
.more-item:hover .more-arrow{ transform:translateX(4px); }

/* ============ FAQ ============ */
.faq-list{
  display:flex;
  flex-direction:column;
  gap:14px;
}
.faq-item{
  background:#fff;
  border:1px solid var(--line);
  border-radius:18px;
  box-shadow:var(--sh-1);
  overflow:hidden;
  transition:border-color .22s var(--ease);
}
.faq-item[open]{ border-color:rgba(109,59,245,.35); }
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 26px;
  cursor:pointer;
  list-style:none;
  font-size:17px;
  font-weight:700;
  color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary:hover{ color:var(--brand); }
.faq-icon{
  position:relative;
  flex:0 0 auto;
  width:22px; height:22px;
  border-radius:50%;
  background:var(--brand-soft);
  transition:transform .3s var(--ease), background .3s var(--ease);
}
.faq-icon::before,
.faq-icon::after{
  content:"";
  position:absolute;
  left:50%; top:50%;
  width:10px; height:2px;
  border-radius:2px;
  background:var(--brand);
  transform:translate(-50%,-50%);
}
.faq-icon::after{ transform:translate(-50%,-50%) rotate(90deg); }
.faq-item[open] .faq-icon{ transform:rotate(45deg); background:#EDE7FF; }
.faq-a{
  padding:0 26px 24px;
  position:relative;
}
.faq-a::before{
  content:"";
  position:absolute;
  left:26px; top:2px;
  width:3px; height:calc(100% - 26px);
  border-radius:3px;
  background:var(--grad);
  opacity:.85;
}
.faq-a p{
  padding-left:18px;
  font-size:15px;
  line-height:1.9;
  color:var(--ink-sub);
}
.faq-a p + p{ margin-top:12px; }

/* ============ 底部 CTA 通栏 ============ */
.cta-wrap{ padding:0 0 88px; }
.cta-band{
  position:relative;
  overflow:hidden;
  background:#14122A;
  border-radius:32px;
  padding:52px 56px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:40px;
  border:1px solid rgba(255,255,255,.14);
}
.cta-band::before{
  content:"";
  position:absolute;
  left:-80px; bottom:-140px;
  width:380px; height:380px;
  border-radius:50%;
  background:var(--grad);
  opacity:.30;
  filter:blur(110px);
  pointer-events:none;
}
.cta-band::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px, transparent 1px);
  background-size:22px 22px;
  opacity:.35;
  pointer-events:none;
}
.cta-text{ position:relative; z-index:2; max-width:620px; }
.cta-text h2{
  font-size:clamp(22px,2.6vw,30px);
  line-height:1.3;
  font-weight:800;
  color:#fff;
  letter-spacing:-.01em;
}
.cta-text p{
  margin-top:14px;
  font-size:16px;
  color:rgba(255,255,255,.68);
}
.cta-actions{
  position:relative;
  z-index:2;
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  flex:0 0 auto;
}
.btn-outline-light{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:44px;
  padding:0 22px;
  border-radius:14px;
  border:1.5px solid rgba(255,255,255,.35);
  color:#fff;
  font-size:15px;
  font-weight:700;
  transition:background .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn-outline-light:hover{
  background:rgba(255,255,255,.10);
  border-color:rgba(255,255,255,.7);
  transform:translateY(-2px);
}

/* ============ 页脚 ============ */
.site-footer{
  background:#14122A;
  border-radius:32px 32px 0 0;
  padding:72px 0 28px;
  color:rgba(255,255,255,.65);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:#fff;
  margin-bottom:16px;
}
.footer-brand b{ font-size:18px; font-weight:800; }
.footer-brand i{ font-style:normal; font-size:12px; color:rgba(255,255,255,.5); }
.footer-intro{
  font-size:14px;
  line-height:1.9;
  color:rgba(255,255,255,.62);
  max-width:360px;
}
.footer-social{ display:flex; gap:10px; margin-top:20px; }
.footer-social a{
  display:inline-flex;
  align-items:center;
  height:34px;
  padding:0 16px;
  border-radius:999px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);
  font-size:13px;
  color:rgba(255,255,255,.85);
  transition:color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}
.footer-social a:hover{
  color:var(--accent);
  background:rgba(255,255,255,.14);
  transform:translateY(-2px);
}
.site-footer h4{
  font-size:15px;
  font-weight:700;
  color:rgba(255,255,255,.92);
  margin-bottom:18px;
}
.footer-links li + li{ margin-top:12px; }
.footer-links a{
  font-size:14px;
  color:rgba(255,255,255,.65);
  transition:color .2s var(--ease), transform .2s var(--ease);
  display:inline-block;
}
.footer-links a:hover{
  color:var(--accent);
  transform:translateX(3px);
}
.footer-contact li{
  font-size:14px;
  color:rgba(255,255,255,.65);
  margin-bottom:14px;
  line-height:1.8;
}
.footer-contact span{
  display:block;
  font-size:12px;
  color:rgba(255,255,255,.42);
  margin-bottom:2px;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-top:24px;
  border-top:1px solid rgba(255,255,255,.10);
  font-size:13px;
  color:rgba(255,255,255,.5);
}
.footer-bottom .legal{ display:flex; flex-wrap:wrap; gap:18px; }
.footer-bottom .legal a{ color:rgba(255,255,255,.5); transition:color .2s var(--ease); }
.footer-bottom .legal a:hover{ color:var(--accent); }

/* ============ 返回顶部 ============ */
.back-top{
  position:fixed;
  right:24px; bottom:24px;
  width:48px; height:48px;
  border-radius:50%;
  background:var(--grad);
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  box-shadow:var(--sh-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s var(--ease), transform .25s var(--ease), visibility .25s var(--ease);
  z-index:70;
}
.back-top.show{ opacity:1; visibility:visible; transform:translateY(0); }
.back-top:hover{ filter:brightness(1.06); }

/* ============ 入场动效 ============ */
.reveal{
  opacity:0;
  transform:translateY(22px);
  transition:opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.is-visible{ opacity:1; transform:none; }

/* ============ 响应式 ============ */
@media (max-width:1024px){
  .container{ padding:0 24px; }
  .main-nav{ gap:20px; }
  .main-nav a{ font-size:16px; }
  .hero-cat-inner{ grid-template-columns:1fr; gap:32px; padding:40px; }
  .qa-item{ grid-template-columns:1fr; gap:22px; padding:32px 30px; }
  .qa-side{
    border-left:0;
    border-top:1px dashed var(--line-strong);
    padding-left:0;
    padding-top:20px;
    flex-direction:row;
    flex-wrap:wrap;
    justify-content:flex-start;
  }
  .stats-grid{ grid-template-columns:repeat(2,1fr); }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:32px; }
  .cta-band{ flex-direction:column; align-items:flex-start; padding:44px 36px; }
}

@media (max-width:860px){
  .main-nav{
    position:absolute;
    top:64px; left:16px; right:16px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:4px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:20px;
    padding:12px;
    box-shadow:var(--sh-2);
  }
  .site-header.open .main-nav{ display:flex; }
  .main-nav a{
    padding:12px 14px;
    border-radius:12px;
    font-size:16px;
  }
  .main-nav a::after{ display:none; }
  .main-nav a:hover,
  .main-nav a.active{ background:var(--brand-soft); }
  .nav-toggle{ display:inline-flex; }
  .nav-actions .btn-ghost{ display:none; }
  .nav-wrap{ height:64px; }
  .section{ padding:64px 0; }
}

@media (max-width:640px){
  .container{ padding:0 20px; }
  .brand-text i{ display:none; }
  .btn-primary{ padding:0 18px; font-size:14px; }
  .brand-text b{ font-size:16px; }
  .hero-cat{ padding:20px 0 0; }
  .hero-cat-inner{ padding:28px 22px; border-radius:24px; }
  .hero-float{ right:10px; bottom:-10px; padding:10px 12px; }
  .qa-item{ padding:26px 20px; }
  .stats-grid{ grid-template-columns:1fr; }
  .more-item{ flex-wrap:wrap; gap:12px; padding:20px; }
  .more-title{ flex:1 1 100%; font-size:16px; }
  .footer-grid{ grid-template-columns:1fr; }
  .cta-band{ padding:32px 22px; border-radius:24px; }
  .cta-actions{ width:100%; }
  .cta-actions .btn-primary,
  .cta-actions .btn-outline-light{ width:100%; }
  .site-footer{ border-radius:24px 24px 0 0; padding:52px 0 24px; }
  .faq-item summary{ padding:18px 20px; font-size:16px; }
  .faq-a{ padding:0 20px 20px; }
  .faq-a::before{ left:20px; }
  .back-top{ right:16px; bottom:16px; }
}

@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition:none !important; }
  .reveal{ opacity:1; transform:none; }
  html{ scroll-behavior:auto; }
}