/* roulang page: index */
:root{
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --surface-2:#F1EEE9;
  --ink-bg:#101314;
  --text:#14181A;
  --text-2:#5C6367;
  --muted:#8A9095;
  --line:#E4DFD8;
  --line-dark:rgba(255,255,255,.10);
  --brand:#5B4BFF;
  --brand-deep:#4536E0;
  --brand-tint:#EEECFF;
  --accent:#FFC94A;
  --ok:#17B58A;
  --warn:#E8863B;
  --r-card:18px;
  --r-btn:12px;
  --r-badge:6px;
  --r-img:14px;
  --r-input:12px;
  --sh-1:0 1px 2px rgba(16,19,20,.04), 0 8px 24px -12px rgba(16,19,20,.10);
  --sh-2:0 18px 38px -18px rgba(16,19,20,.22);
  --ease:cubic-bezier(.2,.7,.2,1);
  --sec:112px;
  --font-cn:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Inter","Space Grotesk",var(--font-cn);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:1rem;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color 200ms var(--ease)}
a:hover{color:var(--brand-deep)}
h1,h2,h3,h4{margin:0;letter-spacing:-0.01em;color:var(--text)}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}

.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
@media (min-width:1400px){.container{max-width:1280px}}
.sec{padding:var(--sec) 0}
.sec-tight{padding:72px 0}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--ink-bg);color:rgba(255,255,255,.8);font-size:13px}
.topbar-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:38px}
.topbar .tb-domain{font-family:var(--font-num);letter-spacing:.02em;color:rgba(255,255,255,.72)}
.topbar .tb-mid{display:flex;align-items:center;gap:8px}
.topbar .tb-dot{width:6px;height:6px;border-radius:50%;background:var(--ok);display:inline-block}
.topbar .tb-links{display:flex;gap:18px}
.topbar a{color:rgba(255,255,255,.8)}
.topbar a:hover{color:#fff}

/* ---------- 主导航 ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--surface);border-bottom:1px solid var(--line);transition:box-shadow 200ms var(--ease)}
.site-header.is-stuck{box-shadow:0 6px 20px -14px rgba(16,19,20,.4)}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:24px;height:74px;transition:height 220ms var(--ease)}
.site-header.is-stuck .nav-in{height:62px}
.brand{display:flex;align-items:center;gap:12px;color:var(--text)}
.brand:hover{color:var(--text)}
.brand-mark{width:38px;height:38px;border-radius:11px;background:var(--ink-bg);color:#fff;display:flex;align-items:center;justify-content:center;font-family:var(--font-num);font-weight:700;font-size:15px;letter-spacing:.02em;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:16px;font-weight:700;letter-spacing:0}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:.04em}
.nav-menu{display:flex;align-items:center;gap:26px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--text-2);padding:6px 0;transition:color 200ms var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);transition:width 240ms var(--ease)}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--brand)}
.nav-link.active::after{width:100%}
.nav-cta{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;font-size:14px;font-weight:600;padding:11px 22px;border-radius:999px;transition:background 200ms var(--ease),transform 200ms var(--ease)}
.nav-cta:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px)}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);background:var(--surface);align-items:center;justify-content:center;cursor:pointer}
.burger span{display:block;width:18px;height:2px;background:var(--text);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text)}
.burger span::before{top:-6px}
.burger span::after{top:6px}
.drawer{position:fixed;inset:0;background:var(--surface);z-index:120;display:none;flex-direction:column}
.drawer.open{display:flex}
.drawer-top{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.drawer-close{width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);background:var(--surface);font-size:20px;line-height:1;cursor:pointer;color:var(--text)}
.drawer-body{padding:24px 20px;display:flex;flex-direction:column;gap:20px;flex:1;overflow:auto}
.drawer-body a{font-size:17px;font-weight:500;color:var(--text)}
.drawer-foot{padding:20px;border-top:1px solid var(--line)}
.drawer-foot .btn-primary-x{width:100%;justify-content:center}

/* ---------- 按钮 / 标签 ---------- */
.btn-primary-x{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--brand);color:#fff;font-size:15px;font-weight:600;padding:14px 28px;border-radius:var(--r-btn);border:1px solid var(--brand);cursor:pointer;transition:background 200ms var(--ease),transform 200ms var(--ease),box-shadow 200ms var(--ease)}
.btn-primary-x:hover{background:var(--brand-deep);border-color:var(--brand-deep);color:#fff;transform:translateY(-2px)}
.btn-primary-x:active{transform:translateY(1px)}
.btn-ghost-x{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--surface);color:var(--text);font-size:15px;font-weight:600;padding:14px 28px;border-radius:var(--r-btn);border:1px solid var(--text);cursor:pointer;transition:background 200ms var(--ease),transform 200ms var(--ease)}
.btn-ghost-x:hover{background:var(--surface-2);color:var(--text);transform:translateY(-2px)}
.btn-ghost-x:active{transform:translateY(1px)}
.btn-link-x{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--brand)}
.btn-link-x svg{transition:transform 240ms var(--ease)}
.btn-link-x:hover svg{transform:translateX(4px)}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;letter-spacing:.04em;padding:4px 10px;border-radius:var(--r-badge)}
.tag-accent{background:rgba(255,201,74,.28);color:#6B4A00}
.tag-brand{background:var(--brand-tint);color:var(--brand)}
.tag-dark{background:rgba(255,255,255,.10);color:#fff}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.06em;color:var(--text-2);text-transform:uppercase}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent)}

/* ---------- 板块标题 ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px}
.sec-head h2{font-size:clamp(1.75rem,3.2vw,2.5rem);line-height:1.2;font-weight:750}
.sec-head p{color:var(--text-2);max-width:34em;margin-top:12px}
.sec-label{display:block;margin-bottom:14px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:88px 0 96px}
.hero-shape{position:absolute;top:-80px;right:-40px;width:320px;height:320px;background:rgba(91,75,255,.10);border-radius:50%;pointer-events:none}
.hero-shape-2{position:absolute;bottom:-60px;left:-70px;width:200px;height:200px;background:rgba(255,201,74,.16);border-radius:36px;transform:rotate(18deg);pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center;min-height:600px}
.hero h1{font-size:clamp(2.4rem,5.2vw,4.2rem);line-height:1.08;font-weight:800;margin-bottom:20px}
.hero .lead{font-size:1.0625rem;line-height:1.85;color:var(--text-2);max-width:32em;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-bottom:48px}
.hero-stats{display:flex;flex-wrap:wrap;gap:40px;border-top:1px solid var(--line);padding-top:26px}
.stat-num{font-family:var(--font-num);font-size:clamp(1.75rem,2.6vw,2.125rem);font-weight:700;font-variant-numeric:tabular-nums;letter-spacing:-0.02em;line-height:1.1}
.stat-label{font-size:13px;color:var(--muted);margin-top:4px}
.hero-visual{position:relative}
.hero-visual .main-img{border-radius:20px;overflow:hidden;position:relative;box-shadow:var(--sh-1)}
.hero-visual .main-img img{width:100%;height:460px;object-fit:cover}
.hero-visual .main-img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(16,19,20,.08),rgba(16,19,20,.20))}
.float-card{position:absolute;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:14px;display:flex;gap:12px;align-items:center;width:250px}
.float-card img{width:52px;height:52px;border-radius:12px;object-fit:cover}
.float-card .fc-t{font-size:14px;font-weight:650;line-height:1.4}
.float-card .fc-s{font-size:12px;color:var(--muted)}
.float-a{bottom:-26px;left:-28px}
.float-b{top:-24px;right:-16px;width:220px}

/* ---------- 功能分组 ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card-x{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);padding:24px;transition:transform 240ms var(--ease),box-shadow 240ms var(--ease)}
.card-x:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.card-x h3{font-size:1.25rem;font-weight:650;line-height:1.35;margin:16px 0 10px}
.card-x p{color:var(--text-2);font-size:.9375rem;line-height:1.8}
.feature-wide{grid-column:span 2;display:grid;grid-template-columns:200px 1fr;gap:24px;align-items:center;padding:0;overflow:hidden}
.feature-wide .fw-img{height:100%;min-height:220px;overflow:hidden}
.feature-wide .fw-img img{width:100%;height:100%;object-fit:cover;transition:transform 240ms var(--ease)}
.feature-wide:hover .fw-img img{transform:scale(1.03)}
.feature-wide .fw-body{padding:28px 28px 28px 0}
.icon-box{width:44px;height:44px;border-radius:12px;background:var(--brand-tint);color:var(--brand);display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.icon-box svg{width:24px;height:24px;stroke-width:1.5}

/* ---------- 使用场景 ---------- */
.scene{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:center;padding:56px 0}
.scene.reverse{grid-template-columns:7fr 5fr}
.scene.reverse .scene-media{order:2}
.scene-media{border-radius:var(--r-img);overflow:hidden;box-shadow:var(--sh-1)}
.scene-media img{width:100%;height:340px;object-fit:cover;transition:transform 240ms var(--ease)}
.scene-media:hover img{transform:scale(1.03)}
.scene h3{font-size:1.5rem;font-weight:650;line-height:1.35;margin-bottom:14px}
.scene p{color:var(--text-2)}
.point-list{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.point-list li{position:relative;padding-left:20px;font-size:.9375rem;color:var(--text-2)}
.point-list li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;background:var(--brand);border-radius:2px}
.scene-num{font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.08em;margin-bottom:12px}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:8fr 4fr;gap:24px}
.case-main{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform 240ms var(--ease),box-shadow 240ms var(--ease)}
.case-main:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.case-main .cm-img{height:240px;overflow:hidden}
.case-main .cm-img img{width:100%;height:100%;object-fit:cover;transition:transform 240ms var(--ease)}
.case-main:hover .cm-img img{transform:scale(1.03)}
.case-main .cm-body{padding:28px}
.quote{font-size:1.125rem;line-height:1.7;font-weight:600;color:var(--text)}
.metric-row{display:flex;gap:32px;border-top:1px solid var(--line);margin-top:24px;padding-top:20px;flex-wrap:wrap}
.metric-num{font-family:var(--font-num);font-size:1.5rem;font-weight:700;font-variant-numeric:tabular-nums}
.metric-num small{font-size:12px;font-weight:600;color:var(--muted);margin-left:2px}
.metric-label{font-size:12px;color:var(--muted)}
.case-side{display:flex;flex-direction:column;gap:24px}
.case-row{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1);transition:transform 240ms var(--ease),box-shadow 240ms var(--ease);flex:1;display:flex;flex-direction:column;justify-content:space-between}
.case-row:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.case-row .cr-t{font-size:1rem;font-weight:650;line-height:1.5;margin:12px 0 10px}
.case-row .cr-m{font-size:13px;color:var(--muted)}

/* ---------- 价格 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:start}
.price-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:32px 28px;box-shadow:var(--sh-1)}
.price-card h3{font-size:1.375rem;font-weight:650}
.price-card .pc-sub{font-size:13px;color:var(--muted);margin-top:8px;margin-bottom:24px}
.price-amount{font-family:var(--font-num);font-size:2.5rem;font-weight:700;font-variant-numeric:tabular-nums;line-height:1;letter-spacing:-0.02em}
.price-amount span{font-size:14px;font-weight:600;color:var(--muted);margin-left:6px}
.price-list{margin:26px 0 28px;display:flex;flex-direction:column;gap:12px}
.price-list li{display:flex;gap:10px;align-items:flex-start;font-size:.9375rem;color:var(--text-2)}
.price-list svg{width:18px;height:18px;flex:0 0 auto;margin-top:4px;color:var(--brand)}
.price-card.is-featured{background:var(--ink-bg);border-color:rgba(255,255,255,.10);color:#fff;transform:translateY(-12px);position:relative;box-shadow:0 24px 48px -24px rgba(16,19,20,.5)}
.price-card.is-featured h3{color:#fff}
.price-card.is-featured .pc-sub,.price-card.is-featured .price-list li{color:rgba(255,255,255,.72)}
.price-card.is-featured .price-amount span{color:rgba(255,255,255,.6)}
.price-card.is-featured .price-list svg{color:var(--accent)}
.price-badge{position:absolute;top:20px;right:20px}
.price-card.is-featured .btn-ghost-x{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.price-card.is-featured .btn-ghost-x:hover{background:rgba(255,255,255,.10)}
.price-note{font-size:13px;color:var(--muted);margin-top:28px}

/* ---------- 资讯列表（CMS） ---------- */
.filter-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:32px}
.filter-chip{font-size:13px;font-weight:600;padding:8px 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--text-2);transition:all 200ms var(--ease)}
.filter-chip.is-on{background:var(--ink-bg);border-color:var(--ink-bg);color:#fff}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform 240ms var(--ease),box-shadow 240ms var(--ease);display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.news-card .nc-thumb{aspect-ratio:16/9;overflow:hidden}
.news-card .nc-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 240ms var(--ease)}
.news-card:hover .nc-thumb img{transform:scale(1.03)}
.news-card .nc-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-card h3{font-size:1.0625rem;font-weight:650;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .nc-sum{font-size:.875rem;color:var(--text-2);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .nc-meta{font-size:13px;color:var(--muted);margin-top:auto;display:flex;gap:14px;flex-wrap:wrap}
.news-hero-card{grid-column:span 2;flex-direction:row;align-items:stretch}
.news-hero-card .nc-thumb{width:46%;aspect-ratio:auto;min-height:230px;flex:0 0 auto}
.news-hero-card .nc-body{padding:28px}
.news-hero-card h3{font-size:1.375rem;-webkit-line-clamp:3}
.empty-state{border:1px solid var(--line);background:var(--surface);border-radius:var(--r-card);min-height:230px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:14px;padding:32px;width:100%}
.empty-state svg{width:48px;height:48px;color:var(--muted);stroke-width:1.5}
.empty-state p{color:var(--text-2);margin:0}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:border-color 200ms var(--ease)}
.faq-item.open{border-color:#CFC8BE}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:64px;padding:18px 24px;background:transparent;border:0;text-align:left;font-size:1rem;font-weight:650;color:var(--text);cursor:pointer}
.faq-q:hover{color:var(--brand)}
.faq-sign{position:relative;width:22px;height:22px;flex:0 0 auto;transition:transform 180ms var(--ease)}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;background:var(--brand);border-radius:2px}
.faq-sign::before{left:0;top:10px;width:22px;height:2px}
.faq-sign::after{left:10px;top:0;width:2px;height:22px;transition:opacity 180ms var(--ease)}
.faq-item.open .faq-sign::after{opacity:0}
.faq-item.open .faq-sign{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 280ms var(--ease)}
.faq-a-in{padding:0 24px 24px;font-size:.9375rem;line-height:1.85;color:var(--text-2)}

/* ---------- CTA 带 ---------- */
.cta-band{position:relative;background:var(--ink-bg);color:#fff;overflow:hidden}
.cta-band::after{content:"";position:absolute;right:-80px;top:-60px;width:420px;height:420px;background:rgba(91,75,255,.06);transform:rotate(24deg);pointer-events:none}
.cta-in{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:40px;padding:72px 0;flex-wrap:wrap}
.cta-band h2{color:#fff;font-size:clamp(1.75rem,3.2vw,2.5rem);line-height:1.2;font-weight:750;margin-bottom:14px}
.cta-band p{color:rgba(255,255,255,.72);max-width:32em}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn-white-x{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:#fff;color:var(--ink-bg);font-size:15px;font-weight:600;padding:14px 28px;border-radius:var(--r-btn);border:1px solid #fff;transition:background 200ms var(--ease),transform 200ms var(--ease)}
.btn-white-x:hover{background:rgba(255,255,255,.86);color:var(--ink-bg);transform:translateY(-2px)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-bg);color:rgba(255,255,255,.72);padding-top:72px}
.footer-grid{display:grid;grid-template-columns:4fr 2fr 2fr 4fr;gap:40px;padding-bottom:56px}
.footer-brand .brand-mark{background:#fff;color:var(--ink-bg)}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-sub{color:rgba(255,255,255,.5)}
.footer-brand p{margin-top:18px;font-size:.9375rem;line-height:1.8;max-width:26em}
.footer-col h4{color:#fff;font-size:14px;font-weight:650;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{color:rgba(255,255,255,.72);font-size:.9375rem}
.footer-col a:hover{color:#fff}
.footer-card{border:1px solid var(--line-dark);border-radius:var(--r-card);padding:24px}
.footer-card h4{color:#fff;font-size:15px;font-weight:650;margin-bottom:10px}
.footer-card p{font-size:.875rem;color:rgba(255,255,255,.62);margin-bottom:18px}
.footer-card .btn-primary-x{width:100%}
.footer-bottom{border-top:1px solid var(--line-dark);padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.55)}
.footer-bottom a{color:rgba(255,255,255,.55)}
.footer-bottom a:hover{color:#fff}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 480ms var(--ease),transform 480ms var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  :root{--sec:96px}
  .hero-grid{grid-template-columns:1fr;gap:48px;min-height:auto}
  .hero-visual .main-img img{height:380px}
  .float-a{left:12px}
  .float-b{right:12px}
  .feature-wide{grid-template-columns:1fr;padding:0}
  .feature-wide .fw-body{padding:0 24px 24px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .news-hero-card{grid-column:span 2}
}
@media (max-width:991px){
  :root{--sec:72px}
  .nav-menu,.nav-cta{display:none}
  .burger{display:flex}
  .feature-grid{grid-template-columns:1fr 1fr}
  .feature-wide{grid-column:span 2}
  .scene,.scene.reverse{grid-template-columns:1fr;gap:28px;padding:44px 0}
  .scene.reverse .scene-media{order:0}
  .scene-media img{height:260px}
  .case-grid{grid-template-columns:1fr}
  .price-grid{grid-template-columns:1fr;gap:20px}
  .price-card.is-featured{transform:none}
  .topbar .tb-mid{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  :root{--sec:56px}
  .hero{padding:56px 0 64px}
  .hero-stats{gap:26px}
  .sec-head{flex-direction:column;align-items:flex-start;margin-bottom:32px}
  .feature-grid{grid-template-columns:1fr}
  .feature-wide{grid-column:span 1}
  .news-grid{grid-template-columns:1fr}
  .news-hero-card{grid-column:span 1;flex-direction:column}
  .news-hero-card .nc-thumb{width:100%;aspect-ratio:16/9;min-height:0}
  .footer-grid{grid-template-columns:1fr}
  .cta-in{padding:56px 0}
  .hero-visual .main-img img{height:280px}
  .float-card{position:static;width:100%;margin-top:14px}
  .float-b{margin-top:12px}
}
@media (max-width:480px){
  .container{padding:0 16px}
  .btn-primary-x,.btn-ghost-x,.btn-white-x{width:100%}
  .cta-actions{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --surface-2:#F1EEE9;
  --ink-bg:#101314;
  --text:#14181A;
  --text-2:#5C6367;
  --muted:#8A9095;
  --line:#E4DFD8;
  --line-dark:rgba(255,255,255,.10);
  --brand:#5B4BFF;
  --brand-deep:#4536E0;
  --brand-tint:#EEECFF;
  --accent:#FFC94A;
  --accent-tint:#FFF4D6;
  --ok:#17B58A;
  --warn:#E8863B;
  --radius-card:18px;
  --radius-btn:12px;
  --radius-badge:6px;
  --radius-img:14px;
  --shadow-1:0 1px 2px rgba(16,19,20,.04), 0 8px 24px -12px rgba(16,19,20,.10);
  --shadow-2:0 18px 38px -18px rgba(16,19,20,.22);
  --ease:200ms cubic-bezier(.2,.7,.2,1);
  --ease-move:240ms cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;object-fit:cover;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;letter-spacing:-0.01em;line-height:1.25;}
p{margin:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container-x{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.num{font-family:Inter,"Space Grotesk",sans-serif;font-variant-numeric:tabular-nums;}

/* ============ 顶部信息条 ============ */
.topbar{
  background:var(--ink-bg);
  color:rgba(255,255,255,.8);
  font-size:13px;
  line-height:1;
}
.topbar-in{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:38px;
}
.topbar .tb-domain{letter-spacing:.02em;}
.topbar .tb-mid{color:rgba(255,255,255,.62);}
.topbar .tb-actions{display:flex;align-items:center;gap:18px;}
.topbar .tb-actions a{color:rgba(255,255,255,.8);transition:color var(--ease);}
.topbar .tb-actions a:hover{color:#fff;}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease), border-color var(--ease);
}
.site-header.compact{
  box-shadow:0 8px 24px -18px rgba(16,19,20,.35);
}
.nav-in{
  display:flex;
  align-items:center;
  gap:24px;
  height:74px;
  transition:height var(--ease);
}
.site-header.compact .nav-in{height:62px;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand-mark{
  width:42px;height:42px;
  border-radius:12px;
  background:var(--ink-bg);
  color:#fff;
  font-size:15px;
  font-weight:700;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-size:16px;font-weight:700;color:var(--text);}
.brand-sub{font-size:12px;color:var(--muted);}
.nav-menu{
  display:flex;
  align-items:center;
  gap:26px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--text-2);
  padding:6px 0;
  transition:color var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--ease-move);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);}
.nav-link.active::after{transform:scaleX(1);}
.nav-cta{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 22px;
  border-radius:999px;
  background:var(--brand);
  color:#fff;
  font-size:14px;
  font-weight:600;
  transition:background var(--ease), transform var(--ease);
}
.nav-cta:hover{background:var(--brand-deep);transform:translateY(-2px);}
.nav-cta:active{transform:translateY(1px);}
.burger{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface);
  position:relative;
  cursor:pointer;
}
.burger span,
.burger span::before,
.burger span::after{
  position:absolute;
  left:50%;
  width:18px;height:2px;
  background:var(--text);
  border-radius:2px;
  transform:translateX(-50%);
  content:"";
}
.burger span{top:21px;}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}

/* 移动端抽屉 */
.drawer{
  position:fixed;
  inset:0;
  z-index:90;
  background:var(--surface);
  display:none;
  flex-direction:column;
  padding:20px;
}
.drawer.open{display:flex;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px;}
.drawer-close{
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface);
  font-size:20px;
  color:var(--text);
  cursor:pointer;
}
.drawer-menu{display:flex;flex-direction:column;gap:20px;}
.drawer-menu a{
  font-size:18px;
  font-weight:600;
  color:var(--text);
  padding:6px 0;
}
.drawer-menu a.active{color:var(--brand);}
.drawer-bottom{margin-top:auto;padding-top:24px;}
.drawer-bottom .btn-primary-x{width:100%;justify-content:center;}

/* ============ 通用按钮 ============ */
.btn-primary-x{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:46px;
  padding:14px 28px;
  border-radius:var(--radius-btn);
  background:var(--brand);
  color:#fff;
  font-size:15px;
  font-weight:600;
  border:none;
  cursor:pointer;
  transition:background var(--ease), transform var(--ease), box-shadow var(--ease);
}
.btn-primary-x:hover{background:var(--brand-deep);transform:translateY(-2px);}
.btn-primary-x:active{transform:translateY(1px);}
.btn-ghost-x{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:46px;
  padding:14px 28px;
  border-radius:var(--radius-btn);
  background:var(--surface);
  color:var(--text);
  border:1px solid var(--text);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:background var(--ease), transform var(--ease);
}
.btn-ghost-x:hover{background:var(--surface-2);transform:translateY(-2px);}
.btn-white-x{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:46px;
  padding:14px 28px;
  border-radius:var(--radius-btn);
  background:#fff;
  color:var(--ink-bg);
  font-size:15px;
  font-weight:600;
  transition:transform var(--ease), background var(--ease);
}
.btn-white-x:hover{transform:translateY(-2px);background:#F2F0EC;}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--brand);
  font-size:14px;
  font-weight:600;
  min-height:44px;
}
.link-arrow svg{transition:transform var(--ease-move);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ============ 面包屑 ============ */
.crumb{
  font-size:13px;
  color:var(--muted);
  padding:22px 0 0;
}
.crumb a{color:var(--muted);transition:color var(--ease);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{margin:0 8px;color:#C9C4BC;}
.crumb .cur{color:var(--text);}

/* ============ 分类 Hero ============ */
.cat-hero{
  position:relative;
  overflow:hidden;
  background:var(--bg);
  padding:44px 0 56px;
  min-height:300px;
}
.cat-hero::before{
  content:"";
  position:absolute;
  right:-120px;
  top:-90px;
  width:360px;height:360px;
  border-radius:50%;
  background:rgba(91,75,255,.10);
  pointer-events:none;
}
.cat-hero-in{position:relative;max-width:760px;}
.hero-badge{
  display:inline-block;
  padding:4px 10px;
  border-radius:var(--radius-badge);
  background:var(--accent-tint);
  color:#7A5A08;
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  margin-bottom:18px;
}
.cat-hero h1{
  font-size:clamp(2rem,4.4vw,3.05rem);
  font-weight:800;
  line-height:1.14;
  margin-bottom:16px;
}
.cat-hero p.lead-x{
  font-size:17px;
  line-height:1.85;
  color:var(--text-2);
  max-width:34em;
  margin-bottom:26px;
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:12px 28px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.hero-meta span{font-size:13px;color:var(--muted);}
.hero-meta b{color:var(--text);font-weight:600;}

/* ============ 板块通用 ============ */
.section{padding:88px 0;}
.section.tight{padding-top:0;}
.sec-label{
  display:inline-block;
  padding:4px 10px;
  border-radius:var(--radius-badge);
  background:var(--brand-tint);
  color:var(--brand);
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  margin-bottom:14px;
}
.sec-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:40px;
}
.sec-head h2{
  font-size:clamp(1.6rem,3vw,2.25rem);
  font-weight:750;
}
.sec-head p{
  margin-top:10px;
  color:var(--text-2);
  font-size:15px;
  max-width:44em;
}

/* ============ 三栏导航卡 ============ */
.entry-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.entry-card{
  display:flex;
  flex-direction:column;
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  transition:transform var(--ease-move), box-shadow var(--ease), border-color var(--ease);
}
.entry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#DAD4CB;}
.entry-ico{
  width:48px;height:48px;
  border-radius:14px;
  background:var(--brand-tint);
  color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  margin-bottom:18px;
}
.entry-card h3{font-size:1.2rem;font-weight:650;margin-bottom:10px;}
.entry-card p{font-size:14.5px;color:var(--text-2);margin-bottom:18px;}
.entry-card .link-arrow{margin-top:auto;}

/* ============ 说明性清单 ============ */
.check-wrap{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.check-list{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
}
.check-row{
  display:grid;
  grid-template-columns:64px minmax(0,1fr) auto;
  gap:16px;
  align-items:center;
  padding:20px 24px;
  border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.check-row:last-child{border-bottom:none;}
.check-row:hover{background:var(--surface-2);}
.check-idx{
  font-family:Inter,"Space Grotesk",sans-serif;
  font-variant-numeric:tabular-nums;
  font-size:15px;
  font-weight:700;
  color:var(--brand);
}
.check-row h4{font-size:15.5px;font-weight:650;margin-bottom:4px;}
.check-row p{font-size:13.5px;color:var(--text-2);}
.chip{
  display:inline-block;
  padding:4px 10px;
  border-radius:var(--radius-badge);
  font-size:12px;
  font-weight:600;
  white-space:nowrap;
  background:var(--brand-tint);
  color:var(--brand);
}
.chip.accent{background:var(--accent-tint);color:#7A5A08;}
.chip.plain{background:var(--surface-2);color:var(--text-2);}
.check-side .figure{
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid var(--line);
  margin-bottom:22px;
}
.check-side .figure img{width:100%;aspect-ratio:4/3;}
.check-side h3{font-size:1.25rem;font-weight:650;margin-bottom:12px;}
.check-side p{color:var(--text-2);font-size:15px;margin-bottom:18px;}
.dot-list li{
  position:relative;
  padding-left:20px;
  margin-bottom:12px;
  font-size:14.5px;
  color:var(--text-2);
}
.dot-list li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--brand);
}
.dot-list li b{color:var(--text);font-weight:600;}

/* ============ 提示条 ============ */
.notice{
  display:flex;
  gap:16px;
  align-items:flex-start;
  background:var(--brand-tint);
  border-left:3px solid var(--brand);
  border-radius:12px;
  padding:20px 22px;
  margin-top:40px;
}
.notice svg{flex:0 0 auto;color:var(--brand);margin-top:2px;}
.notice p{font-size:14.5px;color:var(--text-2);}
.notice p b{color:var(--text);}

/* ============ 数据条 ============ */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
  margin-top:44px;
  padding-top:28px;
  border-top:1px solid var(--line);
}
.stat-strip .stat b{
  display:block;
  font-family:Inter,"Space Grotesk",sans-serif;
  font-variant-numeric:tabular-nums;
  font-size:clamp(1.75rem,3.4vw,2.15rem);
  font-weight:700;
  color:var(--text);
  line-height:1.15;
}
.stat-strip .stat b small{font-size:.5em;font-weight:600;color:var(--text-2);margin-left:4px;}
.stat-strip .stat span{display:block;font-size:13.5px;color:var(--muted);margin-top:6px;}

/* ============ 底部 CTA 带 ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--ink-bg);
  color:#fff;
  padding:76px 0;
}
.cta-band::after{
  content:"";
  position:absolute;
  right:-80px;
  bottom:-120px;
  width:420px;height:320px;
  background:rgba(91,75,255,.06);
  transform:skewX(-16deg);
  pointer-events:none;
}
.cta-band .cta-in{position:relative;max-width:720px;}
.cta-band h2{
  font-size:clamp(1.7rem,3.2vw,2.4rem);
  font-weight:750;
  margin-bottom:14px;
}
.cta-band p{color:rgba(255,255,255,.72);font-size:15.5px;margin-bottom:28px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-bg);
  color:rgba(255,255,255,.72);
  padding:72px 0 0;
  border-top:1px solid var(--line-dark);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand .brand-mark{background:rgba(255,255,255,.08);border:1px solid var(--line-dark);}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-sub{color:rgba(255,255,255,.5);}
.footer-brand p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.62);max-width:30em;}
.footer-col h4{font-size:14px;font-weight:650;color:#fff;margin-bottom:16px;}
.footer-col li{margin-bottom:12px;}
.footer-col a{font-size:13.5px;color:rgba(255,255,255,.66);transition:color var(--ease);}
.footer-col a:hover{color:#fff;}
.footer-card{
  background:rgba(255,255,255,.04);
  border:1px solid var(--line-dark);
  border-radius:var(--radius-card);
  padding:22px;
}
.footer-card h4{font-size:14.5px;font-weight:650;color:#fff;margin-bottom:10px;}
.footer-card p{font-size:13px;color:rgba(255,255,255,.6);margin-bottom:16px;}
.footer-card .btn-primary-x{min-height:42px;padding:10px 20px;font-size:13.5px;}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:22px 0 28px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:12.5px;
  color:rgba(255,255,255,.45);
}

/* ============ 滚动入场 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 420ms cubic-bezier(.2,.7,.2,1),transform 420ms cubic-bezier(.2,.7,.2,1);}
.reveal.in{opacity:1;transform:none;}

/* ============ 响应式 ============ */
@media (min-width:1400px){
  .container-x{max-width:1280px;}
}
@media (max-width:1199px){
  .check-wrap{grid-template-columns:minmax(0,1fr);gap:36px;}
  .entry-grid{gap:20px;}
}
@media (max-width:991px){
  .nav-menu,.nav-cta{display:none;}
  .burger{display:block;margin-left:auto;}
  .nav-in{height:68px;}
  .section{padding:72px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .toppbar .tb-mid{display:none;}
}
@media (max-width:768px){
  .container-x{padding:0 20px;}
  .topbar .tb-mid{display:none;}
  .cat-hero{padding:32px 0 44px;}
  .section{padding:56px 0;}
  .section.tight{padding-top:0;}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:28px;}
  .entry-grid{grid-template-columns:minmax(0,1fr);}
  .stat-strip{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
  .check-row{grid-template-columns:44px minmax(0,1fr);row-gap:8px;}
  .check-row .chip{grid-column:2;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-band{padding:60px 0;}
}
@media (max-width:520px){
  .container-x{padding:0 16px;}
  .brand-sub{display:none;}
  .cat-hero h1{font-size:1.85rem;}
  .stat-strip{grid-template-columns:minmax(0,1fr);gap:20px;}
  .stat-strip .stat{display:flex;align-items:baseline;gap:12px;}
  .stat-strip .stat span{margin-top:0;}
  .footer-bottom{flex-direction:column;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --surface-2:#F1EEE9;
  --ink-bg:#101314;
  --text:#14181A;
  --text-2:#5C6367;
  --muted:#8A9095;
  --line:#E4DFD8;
  --line-dark:rgba(255,255,255,.10);
  --brand:#5B4BFF;
  --brand-deep:#4536E0;
  --brand-tint:#EEECFF;
  --accent:#FFC94A;
  --ok:#17B58A;
  --warn:#E8863B;
  --r-card:18px;
  --r-btn:12px;
  --r-badge:6px;
  --r-img:14px;
  --shadow-card:0 1px 2px rgba(16,19,20,.04), 0 8px 24px -12px rgba(16,19,20,.10);
  --shadow-hover:0 18px 38px -18px rgba(16,19,20,.22);
  --ease:200ms cubic-bezier(.2,.7,.2,1);
  --ease-move:240ms cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  font-size:1rem;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand);}
button{font:inherit;cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;}
h1,h2,h3,h4{margin:0;font-weight:750;letter-spacing:-.01em;color:var(--text);}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.container{max-width:1280px;}}
@media (max-width:768px){.container{padding:0 20px;}}
@media (max-width:480px){.container{padding:0 16px;}}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--ink-bg);color:rgba(255,255,255,.80);font-size:13px;line-height:1;}
.topbar-in{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px;padding:10px 0;}
.topbar-domain{font-family:Inter,"Space Grotesk",system-ui,sans-serif;letter-spacing:.02em;color:rgba(255,255,255,.72);}
.topbar-note{color:rgba(255,255,255,.62);display:flex;align-items:center;gap:8px;}
.topbar-note i{width:7px;height:7px;border-radius:50%;background:var(--ok);display:inline-block;}
.topbar-links{display:flex;align-items:center;gap:20px;}
.topbar-links a{color:rgba(255,255,255,.78);}
.topbar-links a:hover{color:#fff;}
@media (max-width:768px){
  .topbar-note{display:none;}
  .topbar-links{gap:14px;}
}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 30px -22px rgba(16,19,20,.35);}
.nav-in{display:flex;align-items:center;gap:28px;height:74px;transition:height var(--ease);}
.site-header.is-scrolled .nav-in{height:62px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:42px;height:42px;border-radius:12px;flex-shrink:0;
  background:var(--ink-bg);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:.85rem;font-weight:700;letter-spacing:.04em;
  position:relative;overflow:hidden;
}
.brand-mark::after{
  content:"";position:absolute;right:-6px;bottom:-6px;width:20px;height:20px;
  background:var(--brand);border-radius:6px;opacity:.85;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:1rem;font-weight:750;color:var(--text);}
.brand-sub{font-size:.72rem;color:var(--muted);letter-spacing:.02em;}
a.brand:hover .brand-name{color:var(--brand);}
.nav-menu{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text-2);
  padding:6px 0;white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease-move);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);font-weight:600;}
.nav-cta{
  flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:11px 24px;border-radius:var(--r-btn);
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;
  transition:background var(--ease),transform var(--ease-move);
}
.nav-cta:hover{background:var(--brand-deep);color:#fff;transform:translateY(2px);}
.nav-cta:active{transform:translateY(3px);}
.drawer-cta{display:none;}
.burger{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);align-items:center;justify-content:center;
  flex-shrink:0;margin-left:auto;
}
.burger span{display:block;width:18px;height:2px;background:var(--text);position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}

@media (max-width:1100px){
  .nav-menu{gap:18px;}
  .nav-link{font-size:14px;}
}
@media (max-width:991px){
  .burger{display:inline-flex;}
  .nav-cta{display:none;}
  .nav-menu{
    position:fixed;inset:0;z-index:1200;
    background:var(--surface);
    flex-direction:column;align-items:stretch;justify-content:center;
    gap:20px;padding:96px 28px 40px;margin:0;
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity var(--ease),transform var(--ease-move),visibility var(--ease);
    overflow-y:auto;
  }
  .nav-menu.is-open{opacity:1;visibility:visible;transform:none;}
  .nav-menu .nav-link{font-size:1.25rem;font-weight:600;padding:8px 0;}
  .drawer-cta{
    display:inline-flex;align-items:center;justify-content:center;
    min-height:52px;margin-top:16px;padding:14px 24px;border-radius:var(--r-btn);
    background:var(--brand);color:#fff;font-weight:600;
  }
  .drawer-cta:hover{background:var(--brand-deep);color:#fff;}
}

/* ============ 面包屑 ============ */
.crumb-wrap{padding:28px 0 0;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--line);}
.crumb .current{color:var(--text);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章头部 ============ */
.post-head{padding:32px 0 40px;}
.post-badge{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--accent);color:#3A2C05;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  padding:5px 12px;border-radius:var(--r-badge);line-height:1.4;
}
.post-title{
  margin-top:20px;
  font-size:clamp(1.75rem,3.4vw,2.4rem);
  line-height:1.25;font-weight:750;max-width:22ch;
}
.post-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  margin-top:20px;font-size:13px;color:var(--muted);
}
.post-meta .dot{color:var(--line);}
.post-meta .val{color:var(--text-2);}
.post-divider{height:1px;background:var(--line);border:0;margin:0;}

/* ============ 布局 ============ */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:56px;padding:48px 0 96px;}
@media (max-width:1199px){
  .layout{grid-template-columns:minmax(0,1fr);gap:0;padding:40px 0 72px;}
  .side{display:none;}
}

/* ============ 正文排版 ============ */
.article-body{max-width:780px;font-size:1.0625rem;line-height:1.9;color:var(--text);}
.article-body > * + *{margin-top:1.2em;}
.article-body p{max-width:34em;}
.article-body h2{
  position:relative;
  font-size:clamp(1.35rem,2.4vw,1.7rem);line-height:1.35;font-weight:750;
  margin:2.2em 0 .8em;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.24em;width:3px;height:1em;
  background:var(--brand);border-radius:2px;
}
.article-body h3{font-size:1.2rem;line-height:1.4;font-weight:650;margin:1.6em 0 .6em;}
.article-body h4{font-size:1.05rem;font-weight:650;margin:1.4em 0 .5em;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(91,75,255,.30);}
.article-body a:hover{color:var(--brand-deep);border-color:var(--brand-deep);}
.article-body strong{font-weight:700;}
.article-body ul{list-style:none;padding-left:0;max-width:34em;}
.article-body ul li{position:relative;padding-left:20px;margin:.5em 0;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.75em;width:8px;height:8px;
  background:var(--brand);border-radius:2px;
}
.article-body ol{list-style:none;counter-reset:ord;padding-left:0;max-width:34em;}
.article-body ol li{counter-increment:ord;position:relative;padding-left:34px;margin:.5em 0;}
.article-body ol li::before{
  content:counter(ord);
  position:absolute;left:0;top:.1em;
  font-family:Inter,"Space Grotesk",system-ui,sans-serif;
  font-weight:700;font-size:.9em;color:var(--brand);
  font-variant-numeric:tabular-nums;
}
.article-body blockquote{
  margin:1.6em 0;padding:20px 22px;
  background:var(--surface-2);border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;color:var(--text-2);font-size:1rem;line-height:1.85;
}
.article-body blockquote p{max-width:none;margin:0;}
.article-body img{width:100%;height:auto;border-radius:var(--r-img);margin:1.6em 0 .6em;}
.article-body figure{margin:1.6em 0;}
.article-body figcaption{font-size:.8125rem;color:var(--muted);text-align:center;margin-top:8px;}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:.95rem;background:transparent;}
.article-body thead th{background:var(--surface-2);font-weight:650;text-align:left;}
.article-body th,.article-body td{padding:12px 14px;border:0;border-bottom:1px solid var(--line);}
.article-body tbody tr:nth-child(odd){background:transparent;}
.article-body code{
  background:var(--surface-2);padding:2px 6px;border-radius:6px;
  font-size:.9em;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;
}
.article-body pre{
  background:var(--ink-bg);color:#EDEDF2;padding:20px;border-radius:var(--r-card);
  overflow-x:auto;font-size:.9rem;line-height:1.7;
}
.article-body pre code{background:transparent;color:inherit;padding:0;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0;}
.article-body .notice,.article-body .tip{
  background:var(--brand-tint);border-left:3px solid var(--brand);
  padding:16px 20px;border-radius:0 12px 12px 0;font-size:.98rem;
}
.article-body .notice p,.article-body .tip p{max-width:none;}

/* ============ 空态 ============ */
.empty-state{
  max-width:620px;min-height:240px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;gap:16px;padding:48px 24px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
}
.empty-state svg{width:48px;height:48px;stroke:var(--brand);fill:none;stroke-width:1.5;}
.empty-state p{color:var(--text-2);font-size:1rem;}

/* ============ 文末：标签 / 前后篇 / 推荐 ============ */
.post-foot{margin-top:56px;padding-top:40px;border-top:1px solid var(--line);}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  display:inline-flex;align-items:center;
  padding:5px 12px;border-radius:var(--r-badge);
  background:var(--surface-2);color:var(--text-2);
  font-size:12px;font-weight:600;letter-spacing:.04em;
}
.chip:hover{background:var(--brand-tint);color:var(--brand);}

.postnav-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:32px;}
.postnav-card{
  display:block;padding:20px 22px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);
  transition:transform var(--ease-move),box-shadow var(--ease),border-color var(--ease);
}
.postnav-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:transparent;color:inherit;}
.postnav-card .k{font-size:12px;color:var(--muted);letter-spacing:.04em;}
.postnav-card .t{margin-top:8px;font-size:1rem;font-weight:650;color:var(--text);line-height:1.5;}
@media (max-width:768px){.postnav-grid{grid-template-columns:1fr;}}

.related-title{margin-top:56px;font-size:1.25rem;font-weight:750;}
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:24px;}
@media (max-width:992px){.rel-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:600px){.rel-grid{grid-template-columns:1fr;}}
.rel-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  transition:transform var(--ease-move),box-shadow var(--ease),border-color var(--ease);
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:transparent;color:inherit;}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--surface-2);}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--ease-move);}
.rel-card:hover .rel-thumb img{transform:scale(1.03);}
.rel-body{padding:18px 20px 20px;}
.rel-body .k{font-size:12px;color:var(--muted);}
.rel-body .t{margin-top:8px;font-size:.98rem;font-weight:650;line-height:1.5;color:var(--text);}

.back-row{margin-top:36px;}

/* ============ 侧栏 ============ */
.side-sticky{position:sticky;top:96px;display:grid;gap:20px;}
.side-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;
}
.side-card h4{font-size:.95rem;font-weight:750;letter-spacing:.01em;}
.side-card .hint{font-size:12px;color:var(--muted);margin-top:6px;}
.toc-list{display:flex;flex-direction:column;gap:2px;margin-top:14px;max-height:320px;overflow-y:auto;}
.toc-link{
  display:block;font-size:.875rem;color:var(--text-2);
  padding:7px 0 7px 14px;border-left:2px solid var(--line);
  line-height:1.6;transition:color var(--ease),border-color var(--ease);
}
.toc-link.is-sub{padding-left:26px;font-size:.83rem;color:var(--muted);}
.toc-link:hover{color:var(--brand);border-left-color:var(--brand);}
.toc-link.active{color:var(--brand);border-left-color:var(--brand);font-weight:600;}
.side-mini{display:flex;gap:12px;padding:14px 0;border-top:1px solid var(--line);}
.side-mini:first-of-type{border-top:0;padding-top:14px;}
.side-mini .n{
  width:26px;height:26px;flex-shrink:0;border-radius:8px;
  background:var(--brand-tint);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;font-family:Inter,system-ui,sans-serif;
}
.side-mini .txt{font-size:.875rem;line-height:1.6;color:var(--text-2);}
.side-mini .txt:hover{color:var(--brand);}
.side-cta{
  background:var(--surface);border:1px solid var(--brand);
  border-radius:var(--r-card);padding:22px;
}
.side-cta h4{font-size:.95rem;font-weight:750;}
.side-cta p{margin-top:8px;font-size:.875rem;color:var(--text-2);line-height:1.75;}

/* ============ 按钮 ============ */
.btn-primary-x,.btn-outline-x,.btn-light-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:14px 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:background var(--ease),color var(--ease),transform var(--ease-move),border-color var(--ease);
}
.btn-primary-x{background:var(--brand);color:#fff;}
.btn-primary-x:hover{background:var(--brand-deep);color:#fff;transform:translateY(2px);}
.btn-primary-x:active{transform:translateY(3px);}
.btn-outline-x{background:transparent;color:var(--text);border:1px solid var(--text);}
.btn-outline-x:hover{background:var(--surface-2);color:var(--text);transform:translateY(2px);}
.btn-light-x{background:#fff;color:var(--text);}
.btn-light-x:hover{background:rgba(255,255,255,.88);color:var(--text);transform:translateY(2px);}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;color:var(--brand);
}
.link-arrow svg{width:16px;height:16px;transition:transform var(--ease-move);}
.link-arrow:hover{color:var(--brand-deep);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ============ 底部 CTA 带 ============ */
.cta-band{position:relative;background:var(--ink-bg);color:#fff;overflow:hidden;}
.cta-band::before{
  content:"";position:absolute;right:-80px;top:-60px;width:420px;height:340px;
  background:var(--brand);opacity:.06;transform:skewX(-16deg);border-radius:40px;
}
.cta-inner{position:relative;padding:88px 0;max-width:760px;}
.cta-inner h2{color:#fff;font-size:clamp(1.6rem,3vw,2.2rem);line-height:1.25;font-weight:750;}
.cta-inner p{margin-top:16px;color:rgba(255,255,255,.68);font-size:1rem;max-width:34em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:32px;}
@media (max-width:768px){
  .cta-inner{padding:64px 0;}
}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-bg);color:rgba(255,255,255,.72);border-top:1px solid var(--line-dark);}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:40px;padding:72px 0 48px;
}
@media (max-width:991px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:56px 0 40px;}}
@media (max-width:600px){.footer-grid{grid-template-columns:1fr;gap:28px;}}
.site-footer .brand-name{color:#fff;}
.site-footer .brand-sub{color:rgba(255,255,255,.5);}
.site-footer .brand-mark{background:rgba(255,255,255,.08);border:1px solid var(--line-dark);}
.footer-brand p{margin-top:18px;font-size:.9rem;line-height:1.85;color:rgba(255,255,255,.6);max-width:32em;}
.footer-col h4{color:#fff;font-size:.95rem;font-weight:700;}
.footer-col ul{margin-top:18px;display:grid;gap:12px;}
.footer-col a{font-size:.9rem;color:rgba(255,255,255,.66);}
.footer-col a:hover{color:#fff;}
.footer-card{
  background:rgba(255,255,255,.04);
  border:1px solid var(--line-dark);border-radius:var(--r-card);padding:24px;
}
.footer-card h4{color:#fff;font-size:.95rem;font-weight:700;}
.footer-card p{margin-top:12px;font-size:.875rem;line-height:1.8;color:rgba(255,255,255,.6);}
.footer-card .btn-primary-x{margin-top:20px;width:100%;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:22px 0 32px;border-top:1px solid var(--line-dark);
  font-size:13px;color:rgba(255,255,255,.48);
}
@media (max-width:600px){.footer-bottom{flex-direction:column;align-items:flex-start;}}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 520ms cubic-bezier(.2,.7,.2,1),transform 520ms cubic-bezier(.2,.7,.2,1);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation:none!important;transition-duration:1ms!important;}
}

/* roulang page: category2 */
:root{
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --surface-2:#F1EEE9;
  --ink-bg:#101314;
  --text:#14181A;
  --text-2:#5C6367;
  --muted:#8A9095;
  --line:#E4DFD8;
  --line-dark:rgba(255,255,255,.10);
  --brand:#5B4BFF;
  --brand-deep:#4536E0;
  --brand-tint:#EEECFF;
  --accent:#FFC94A;
  --accent-tint:#FFF6DF;
  --ok:#17B58A;
  --warn:#E8863B;
  --r-card:18px;
  --r-btn:12px;
  --r-badge:6px;
  --r-img:14px;
  --r-input:12px;
  --sh-card:0 1px 2px rgba(16,19,20,.04),0 8px 24px -12px rgba(16,19,20,.10);
  --sh-hover:0 18px 38px -18px rgba(16,19,20,.22);
  --ease:200ms cubic-bezier(.2,.7,.2,1);
  --ease-move:240ms cubic-bezier(.2,.7,.2,1);
  --sec-y:104px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:1.0625rem;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-.005em;color:var(--text);}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.container{max-width:1280px;}}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--ink-bg);color:rgba(255,255,255,.8);font-size:13px;line-height:1.6;}
.topbar-in{display:flex;align-items:center;justify-content:space-between;min-height:38px;gap:16px;}
.topbar-domain{letter-spacing:.02em;color:rgba(255,255,255,.72);font-variant-numeric:tabular-nums;}
.topbar-mid{color:rgba(255,255,255,.68);}
.topbar-actions{display:flex;align-items:center;gap:18px;}
.topbar-actions a{color:rgba(255,255,255,.8);transition:color var(--ease);}
.topbar-actions a:hover{color:#fff;}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),height var(--ease);
}
.site-header.is-stuck{box-shadow:0 6px 20px -14px rgba(16,19,20,.35);}
.nav-in{display:flex;align-items:center;gap:24px;min-height:72px;transition:min-height var(--ease);}
.site-header.is-stuck .nav-in{min-height:60px;}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  background:var(--ink-bg);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;letter-spacing:.02em;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:16px;font-weight:750;color:var(--text);}
.brand-sub{font-size:12px;color:var(--muted);letter-spacing:.03em;}
.nav-menu{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--text-2);
  padding:8px 0;transition:color var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform var(--ease-move);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);font-weight:600;}
.nav-link.active::after{transform:scaleX(1);}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:11px 24px;border-radius:999px;
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;
  transition:background var(--ease),transform var(--ease);
}
.nav-cta:hover{background:var(--brand-deep);transform:translateY(-2px);}
.nav-cta:active{transform:translateY(0);}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--surface);position:relative;cursor:pointer;
}
.burger span,.burger span::before,.burger span::after{
  position:absolute;left:50%;width:18px;height:1.6px;background:var(--text);
  transform:translateX(-50%);transition:var(--ease);
}
.burger span{top:50%;margin-top:-.8px;}
.burger span::before{content:"";left:0;top:-6px;transform:none;}
.burger span::after{content:"";left:0;top:6px;transform:none;}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:0;z-index:80;background:var(--surface);
  display:flex;flex-direction:column;padding:20px 20px 24px;
  transform:translateY(-100%);opacity:0;visibility:hidden;
  transition:transform var(--ease-move),opacity var(--ease),visibility var(--ease);
}
.drawer.open{transform:translateY(0);opacity:1;visibility:visible;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-close{
  width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);
  background:var(--surface);font-size:20px;line-height:1;color:var(--text);cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;gap:20px;padding:28px 0;flex:1;}
.drawer-nav a{font-size:18px;font-weight:600;color:var(--text);}
.drawer-nav a.active{color:var(--brand);}
.drawer-foot .btn-primary-x{width:100%;justify-content:center;}

/* ============ 通用按钮 ============ */
.btn-primary-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:14px 28px;border-radius:var(--r-btn);
  background:var(--brand);color:#fff;font-size:16px;font-weight:600;
  border:1px solid var(--brand);
  transition:background var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-primary-x:hover{background:var(--brand-deep);border-color:var(--brand-deep);transform:translateY(-2px);color:#fff;}
.btn-primary-x:active{transform:translateY(0);}
.btn-ghost-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:14px 28px;border-radius:var(--r-btn);
  background:var(--surface);color:var(--text);font-size:16px;font-weight:600;
  border:1px solid var(--line);
  transition:background var(--ease),border-color var(--ease),transform var(--ease);
}
.btn-ghost-x:hover{background:var(--surface-2);border-color:#D8D2C9;transform:translateY(-2px);color:var(--text);}
.btn-ghost-x:active{transform:translateY(0);}
.btn-light-x{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:14px 28px;border-radius:var(--r-btn);
  background:#fff;color:var(--ink-bg);font-size:16px;font-weight:600;border:1px solid #fff;
  transition:transform var(--ease),opacity var(--ease);
}
.btn-light-x:hover{transform:translateY(-2px);color:var(--ink-bg);opacity:.92;}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--brand);
}
.link-arrow svg{transition:transform var(--ease-move);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ============ 徽章 / 标签 ============ */
.badge-x{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-badge);
  font-size:12px;font-weight:600;letter-spacing:.04em;line-height:1.5;
  background:var(--accent-tint);color:#6B4E00;
}
.badge-x.brand{background:var(--brand-tint);color:var(--brand-deep);}
.sec-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--text-2);
  text-transform:none;
}
.sec-label::before{content:"";width:18px;height:3px;border-radius:2px;background:var(--accent);}

/* ============ Hero ============ */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--bg);
  border-bottom:1px solid var(--line);
  padding:64px 0 72px;
}
.cat-hero::after{
  content:"";position:absolute;top:-60px;right:-80px;width:320px;height:320px;
  background:rgba(91,75,255,.10);border-radius:32px;transform:rotate(18deg);
  pointer-events:none;
}
.cat-hero-in{position:relative;z-index:2;max-width:820px;}
.hero-eyebrow{display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap;}
.cat-hero h1{
  font-size:clamp(2rem,4.4vw,3.25rem);line-height:1.12;font-weight:800;
  margin-bottom:20px;
}
.cat-hero h1 em{font-style:normal;color:var(--brand);}
.hero-lede{font-size:1.0625rem;line-height:1.9;color:var(--text-2);max-width:34em;margin-bottom:30px;}
.hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;}
.hero-meta{
  display:flex;gap:36px;flex-wrap:wrap;margin-top:40px;
  padding-top:24px;border-top:1px solid var(--line);
}
.hero-meta .num{
  font-family:Inter,"Space Grotesk",system-ui,sans-serif;
  font-variant-numeric:tabular-nums;font-size:30px;font-weight:800;line-height:1.1;color:var(--text);
}
.hero-meta .lbl{font-size:13px;color:var(--muted);margin-top:4px;}

/* ============ 面包屑 ============ */
.crumb-bar{padding:18px 0 0;}
.breadcrumb-x{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);flex-wrap:wrap;}
.breadcrumb-x a{color:var(--muted);transition:color var(--ease);}
.breadcrumb-x a:hover{color:var(--brand);}
.breadcrumb-x .sep{color:#C7C1B8;}
.breadcrumb-x .cur{color:var(--text);}

/* ============ 区块通用 ============ */
.section{padding:var(--sec-y) 0;}
.section.tight{padding:80px 0;}
.section-head{max-width:44em;margin-bottom:48px;}
.section-head h2{font-size:clamp(1.65rem,3vw,2.4rem);line-height:1.2;font-weight:750;margin:14px 0 14px;}
.section-head p{color:var(--text-2);font-size:1.0625rem;}
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;flex-wrap:wrap;}

/* ============ 时间线（4 步流程） ============ */
.timeline{position:relative;display:flex;flex-direction:column;gap:36px;}
.timeline::before{
  content:"";position:absolute;left:23px;top:16px;bottom:16px;width:1px;background:var(--line);
}
.tl-item{position:relative;display:grid;grid-template-columns:48px 1fr;gap:28px;align-items:flex-start;}
.tl-dot{
  width:48px;height:48px;border-radius:50%;
  border:1px solid rgba(91,75,255,.38);background:var(--surface);
  display:flex;align-items:center;justify-content:center;
  font-family:Inter,"Space Grotesk",system-ui,sans-serif;font-variant-numeric:tabular-nums;
  font-size:15px;font-weight:700;color:var(--brand);
  position:relative;z-index:1;
  box-shadow:0 1px 2px rgba(16,19,20,.04);
}
.tl-body{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px 30px;box-shadow:var(--sh-card);
  transition:transform var(--ease-move),box-shadow var(--ease-move);
}
.tl-body:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.tl-body h3{font-size:1.25rem;font-weight:650;line-height:1.4;margin-bottom:12px;}
.tl-body p{color:var(--text-2);font-size:1rem;line-height:1.85;}
.tl-body p + p{margin-top:10px;}
.tl-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px;padding-top:18px;border-top:1px solid var(--line);}
.tl-item:nth-child(2) .tl-body{margin-left:16px;}
.tl-item:nth-child(4) .tl-body{margin-left:16px;}

/* ============ 图文区块 ============ */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:64px;align-items:center;}
.split.rev .split-media{order:2;}
.split-media{position:relative;}
.split-media .imgwrap{
  border-radius:20px;overflow:hidden;border:1px solid var(--line);background:var(--surface-2);
  aspect-ratio:4/3;box-shadow:var(--sh-card);
}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms cubic-bezier(.2,.7,.2,1);}
.split-media:hover img{transform:scale(1.03);}
.float-card{
  position:absolute;left:-18px;bottom:-22px;width:min(260px,80%);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:18px 20px;box-shadow:var(--sh-card);
}
.float-card .fc-t{font-size:14px;font-weight:700;margin-bottom:6px;}
.float-card .fc-d{font-size:13px;color:var(--muted);line-height:1.7;}
.split-body h2{font-size:clamp(1.6rem,2.6vw,2.15rem);line-height:1.22;font-weight:750;margin:14px 0 18px;}
.split-body p{color:var(--text-2);max-width:34em;}
.split-body p + p{margin-top:14px;}
.check-list{margin-top:28px;display:flex;flex-direction:column;gap:16px;}
.check-list li{
  display:grid;grid-template-columns:16px 1fr;gap:14px;align-items:flex-start;
  font-size:1rem;color:var(--text);
}
.check-list li::before{
  content:"";width:8px;height:8px;border-radius:2px;background:var(--brand);margin-top:9px;
}
.check-list li span{color:var(--text-2);display:block;font-size:14px;margin-top:4px;}

/* ============ 说明性列表 ============ */
.note-list{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-card);
}
.note-row{
  display:grid;grid-template-columns:200px 1fr;gap:28px;
  padding:24px 28px;border-bottom:1px solid var(--line);
  transition:background var(--ease);
}
.note-row:last-child{border-bottom:0;}
.note-row:hover{background:var(--surface-2);}
.note-row .nt{font-size:15px;font-weight:650;}
.note-row .nd{font-size:15px;color:var(--text-2);line-height:1.8;}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:920px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:box-shadow var(--ease),border-color var(--ease);
}
.faq-item:hover{box-shadow:var(--sh-card);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:16px 24px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.6;
}
.faq-ico{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);position:relative;
  transition:transform var(--ease),background var(--ease),border-color var(--ease);
}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--text-2);
  transform:translate(-50%,-50%);transition:background var(--ease);
}
.faq-ico::before{width:11px;height:1.5px;}
.faq-ico::after{width:1.5px;height:11px;}
.faq-item.open .faq-ico{transform:rotate(180deg);background:var(--brand-tint);border-color:rgba(91,75,255,.3);}
.faq-item.open .faq-ico::before,.faq-item.open .faq-ico::after{background:var(--brand);}
.faq-item.open .faq-ico::after{opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--ease-move);}
.faq-a-in{padding:0 24px 24px;font-size:15px;line-height:1.85;color:var(--text-2);}
.faq-a-in strong{color:var(--text);font-weight:650;}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;background:var(--ink-bg);color:#fff;overflow:hidden;
  padding:88px 0;
}
.cta-band::before{
  content:"";position:absolute;top:-80px;right:-60px;width:420px;height:420px;
  background:rgba(91,75,255,.06);transform:rotate(24deg);border-radius:48px;
}
.cta-in{position:relative;z-index:2;max-width:760px;}
.cta-in h2{
  color:#fff;font-size:clamp(1.7rem,3.2vw,2.5rem);line-height:1.2;font-weight:750;margin-bottom:16px;
}
.cta-in p{color:rgba(255,255,255,.72);font-size:1.0625rem;margin-bottom:32px;max-width:34em;}
.cta-actions{display:flex;gap:16px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-bg);color:rgba(255,255,255,.72);padding:72px 0 0;border-top:1px solid var(--line-dark);}
.site-footer .brand-name{color:#fff;}
.site-footer .brand-sub{color:rgba(255,255,255,.5);}
.site-footer .brand-mark{background:#fff;color:var(--ink-bg);}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;
  padding-bottom:56px;
}
.footer-brand p{margin-top:20px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:30em;}
.footer-col h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:18px;letter-spacing:.04em;}
.footer-col li + li{margin-top:12px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.62);transition:color var(--ease);}
.footer-col a:hover{color:#fff;}
.footer-card{
  border:1px solid var(--line-dark);border-radius:var(--r-card);padding:24px;
  background:rgba(255,255,255,.02);
}
.footer-card h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:10px;}
.footer-card p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);margin-bottom:20px;}
.footer-card .btn-primary-x{width:100%;justify-content:center;font-size:15px;}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.45);
}

/* ============ 滚动入场 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 520ms cubic-bezier(.2,.7,.2,1),transform 520ms cubic-bezier(.2,.7,.2,1);}
.reveal.is-in{opacity:1;transform:none;}

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

/* ============ 响应式 ============ */
@media (max-width:1199px){
  :root{--sec-y:88px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:40px;}
  .footer-card{grid-column:1 / -1;}
}
@media (max-width:991px){
  .nav-menu,.nav-cta{display:none;}
  .burger{display:flex;align-items:center;justify-content:center;margin-left:auto;}
  .nav-in{min-height:64px;}
  .split{grid-template-columns:1fr;gap:44px;}
  .split.rev .split-media{order:0;}
  .float-card{position:static;width:100%;margin-top:16px;box-shadow:none;}
  .note-row{grid-template-columns:1fr;gap:8px;}
}
@media (max-width:768px){
  :root{--sec-y:72px;}
  .container{padding:0 20px;}
  .topbar-mid{display:none;}
  .cat-hero{padding:48px 0 56px;}
  .cat-hero::after{width:220px;height:220px;}
  .hero-meta{gap:24px;margin-top:32px;}
  .hero-meta .num{font-size:26px;}
  .section.tight{padding:64px 0;}
  .timeline::before{left:19px;}
  .tl-item{grid-template-columns:40px 1fr;gap:20px;}
  .tl-dot{width:40px;height:40px;font-size:14px;}
  .tl-body{padding:22px 20px;}
  .tl-item:nth-child(2) .tl-body,
  .tl-item:nth-child(4) .tl-body{margin-left:0;}
  .footer-grid{grid-template-columns:1fr;gap:36px;padding-bottom:40px;}
  .cta-band{padding:64px 0;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .brand-sub{display:none;}
  .hero-actions .btn-primary-x,.hero-actions .btn-ghost-x{width:100%;}
  .hero-meta{gap:18px 28px;}
  .section-head{margin-bottom:32px;}
  .note-row{padding:20px;}
  .faq-q{padding:16px 18px;}
  .faq-a-in{padding:0 18px 20px;}
  .split-media .imgwrap{aspect-ratio:16/10;}
}

/* roulang page: category3 */
:root{
  --bg:#F7F5F1;
  --surface:#FFFFFF;
  --surface-2:#F1EEE9;
  --ink-bg:#101314;
  --text:#14181A;
  --text-2:#5C6367;
  --muted:#8A9095;
  --line:#E4DFD8;
  --line-dark:rgba(255,255,255,.10);
  --brand:#5B4BFF;
  --brand-deep:#4536E0;
  --brand-tint:#EEECFF;
  --accent:#FFC94A;
  --ok:#17B58A;
  --warn:#E8863B;
  --r-card:18px;
  --r-btn:12px;
  --r-badge:6px;
  --r-img:14px;
  --r-input:12px;
  --sh-1:0 1px 2px rgba(16,19,20,.04),0 8px 24px -12px rgba(16,19,20,.10);
  --sh-2:0 18px 38px -18px rgba(16,19,20,.22);
  --ease:200ms cubic-bezier(.2,.7,.2,1);
  --ease-move:240ms cubic-bezier(.2,.7,.2,1);
  --sect:112px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;object-fit:cover;}
a{color:inherit;text-decoration:none;transition:color var(--ease),background-color var(--ease),border-color var(--ease);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4{margin:0;font-weight:750;line-height:1.22;letter-spacing:-0.005em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:var(--sect) 0;}
.section-tight{padding:72px 0;}
.section-head{margin-bottom:40px;max-width:46em;}
.section-head h2{font-size:clamp(1.75rem,3.2vw,2.5rem);}
.section-head p{margin-top:14px;color:var(--text-2);max-width:34em;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.75rem;font-weight:600;letter-spacing:.04em;
  color:var(--text);background:var(--accent);
  padding:4px 10px;border-radius:var(--r-badge);margin-bottom:16px;
}
.eyebrow.brand{background:var(--brand-tint);color:var(--brand);}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--ink-bg);color:rgba(255,255,255,.8);font-size:13px;}
.topbar-in{display:flex;align-items:center;justify-content:space-between;gap:20px;height:38px;}
.topbar .tb-mid{color:rgba(255,255,255,.62);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-links{display:flex;align-items:center;gap:18px;}
.topbar-links a{color:rgba(255,255,255,.8);}
.topbar-links a:hover{color:#fff;}

/* ---------- 主导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background-color var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(16,19,20,.35);}
.nav-in{display:flex;align-items:center;gap:28px;height:74px;transition:height var(--ease);}
.site-header.is-scrolled .nav-in{height:62px;}
.brand{display:flex;align-items:center;gap:12px;flex:none;}
.brand-mark{
  width:42px;height:42px;border-radius:12px;background:var(--ink-bg);color:#fff;
  display:grid;place-items:center;font-size:14px;font-weight:800;letter-spacing:.06em;flex:none;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:16px;font-weight:750;color:var(--text);white-space:nowrap;}
.brand-sub{font-size:12px;color:var(--muted);white-space:nowrap;}
.nav-menu{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:44px;
  font-size:15px;font-weight:500;color:var(--text-2);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:9px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease-move);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);font-weight:600;}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 22px;border-radius:var(--r-btn);
  background:var(--brand);color:#fff;font-size:15px;font-weight:600;white-space:nowrap;
  transition:background-color var(--ease),transform var(--ease-move);
}
.nav-cta:hover{background:var(--brand-deep);transform:translateX(2px);}
.nav-cta:active{transform:translateY(1px);}
.burger{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);
  position:relative;margin-left:auto;background:var(--surface);
}
.burger span,.burger span::before,.burger span::after{
  position:absolute;left:50%;width:18px;height:2px;background:var(--text);border-radius:2px;
  transform:translateX(-50%);transition:transform var(--ease),opacity var(--ease);
}
.burger span{top:21px;}
.burger span::before{content:"";top:-6px;left:0;transform:none;}
.burger span::after{content:"";top:6px;left:0;transform:none;}

/* ---------- 面包屑 ---------- */
.crumb{padding:20px 0 0;font-size:13px;color:var(--muted);}
.crumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li+li::before{content:"/";color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb .current{color:var(--text);}

/* ---------- 分类页 Hero ---------- */
.page-hero{
  position:relative;margin-top:20px;overflow:hidden;
  border-radius:6px;
  background-image:url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(16,19,20,.94) 0%,rgba(16,19,20,.84) 52%,rgba(16,19,20,.62) 100%);
}
.page-hero .container{position:relative;z-index:2;}
.hero-in{min-height:320px;display:flex;flex-direction:column;justify-content:center;padding:56px 0;max-width:44em;}
.page-hero .eyebrow{background:var(--accent);color:#14181A;}
.page-hero h1{
  font-size:clamp(1.9rem,4vw,2.9rem);line-height:1.16;color:#fff;font-weight:800;
}
.hero-sub{margin-top:18px;color:rgba(255,255,255,.78);font-size:1.0625rem;max-width:34em;}
.hero-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:16px;align-items:center;}

/* ---------- 按钮 ---------- */
.btn-primary-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-btn);background:var(--brand);color:#fff;
  font-size:15px;font-weight:600;border:1px solid var(--brand);
  transition:background-color var(--ease),transform var(--ease-move),box-shadow var(--ease);
}
.btn-primary-x:hover{background:var(--brand-deep);border-color:var(--brand-deep);transform:translateY(-2px);}
.btn-primary-x:active{transform:translateY(1px);}
.btn-ghost-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-btn);background:var(--surface);color:var(--text);
  font-size:15px;font-weight:600;border:1px solid var(--text);
  transition:background-color var(--ease),transform var(--ease-move),color var(--ease);
}
.btn-ghost-x:hover{background:var(--surface-2);transform:translateY(-2px);}
.btn-ghost-x:active{transform:translateY(1px);}
.btn-light-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-btn);background:#fff;color:var(--ink-bg);
  font-size:15px;font-weight:600;border:1px solid #fff;
  transition:transform var(--ease-move),background-color var(--ease);
}
.btn-light-x:hover{transform:translateY(-2px);background:#F1EEE9;}
.btn-ghost-dark{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-btn);background:transparent;color:#fff;
  font-size:15px;font-weight:600;border:1px solid rgba(255,255,255,.32);
  transition:background-color var(--ease),transform var(--ease-move);
}
.btn-ghost-dark:hover{background:rgba(255,255,255,.10);transform:translateY(-2px);}
.link-arrow{
  display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:600;font-size:15px;
}
.link-arrow svg{transition:transform var(--ease-move);}
.link-arrow:hover svg{transform:translateX(4px);}
.link-arrow.on-dark{color:#fff;}

/* ---------- 搜索区 ---------- */
.search-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:34px 32px;box-shadow:var(--sh-1);
}
.search-panel h2{font-size:clamp(1.4rem,2.4vw,1.85rem);}
.search-panel .sp-note{margin-top:10px;color:var(--text-2);font-size:.9375rem;max-width:34em;}
.search-box{
  margin-top:22px;display:flex;gap:12px;align-items:center;
  background:var(--bg);border:1px solid var(--line);border-radius:var(--r-input);
  padding:8px 8px 8px 16px;transition:border-color var(--ease),box-shadow var(--ease);
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);}
.search-box .sb-icon{flex:none;color:var(--muted);display:grid;place-items:center;}
.search-box input{
  flex:1 1 auto;min-width:0;border:0;background:transparent;
  padding:12px 4px;font-size:16px;color:var(--text);outline:none;
}
.search-box input::placeholder{color:var(--muted);}
.search-tags{margin-top:18px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.search-tags .st-label{font-size:13px;color:var(--muted);}
.tag-x{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:var(--r-badge);
  background:var(--surface-2);color:var(--text-2);font-size:12px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;transition:all var(--ease);
}
.tag-x:hover{background:var(--brand-tint);color:var(--brand);border-color:var(--brand-tint);}
.badge-x{
  display:inline-flex;align-items:center;padding:4px 10px;border-radius:var(--r-badge);
  background:var(--accent);color:#14181A;font-size:12px;font-weight:600;letter-spacing:.04em;
}
.badge-x.brand{background:var(--brand-tint);color:var(--brand);}

/* ---------- FAQ 布局 ---------- */
.faq-layout{display:grid;grid-template-columns:252px minmax(0,1fr);gap:56px;align-items:start;}
.faq-toc{position:sticky;top:100px;}
.faq-toc h2{font-size:1rem;font-weight:700;margin-bottom:16px;color:var(--text);}
.faq-toc .toc-list{display:flex;flex-direction:column;gap:4px;border-left:1px solid var(--line);}
.faq-toc a{
  display:block;padding:10px 0 10px 16px;font-size:14.5px;color:var(--text-2);
  border-left:2px solid transparent;margin-left:-1px;
  transition:color var(--ease),border-color var(--ease),padding-left var(--ease-move);
}
.faq-toc a:hover{color:var(--text);padding-left:20px;}
.faq-toc a.active{color:var(--brand);border-left-color:var(--brand);font-weight:600;}
.toc-help{
  margin-top:24px;padding:20px;border:1px solid var(--line);border-radius:var(--r-card);
  background:var(--surface-2);
}
.toc-help p{font-size:13.5px;color:var(--text-2);line-height:1.75;}
.toc-help a{margin-top:12px;font-size:14px;}

.faq-group{margin-bottom:56px;scroll-margin-top:110px;}
.faq-group:last-child{margin-bottom:0;}
.faq-group-head{margin-bottom:20px;}
.faq-group-head h2{font-size:clamp(1.3rem,2.4vw,1.7rem);}
.faq-group-head p{margin-top:8px;color:var(--text-2);font-size:.9375rem;max-width:34em;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item:hover{border-color:#D6D0C7;}
.faq-item.open{border-color:#CFC8BE;box-shadow:var(--sh-1);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;text-align:left;font-size:1.0625rem;font-weight:600;color:var(--text);
  min-height:64px;
}
.faq-icon{position:relative;width:16px;height:16px;flex:none;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--text-2);border-radius:2px;
  transition:transform 180ms var(--ease),opacity 180ms var(--ease),background-color var(--ease);
}
.faq-icon::before{left:0;top:7px;width:16px;height:2px;}
.faq-icon::after{left:7px;top:0;width:2px;height:16px;}
.faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-item.open .faq-icon::before{background:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--ease-move);}
.faq-a-in{padding:0 24px 22px;font-size:15px;line-height:1.85;color:var(--text-2);}
.faq-item.open .faq-a-in{border-top:1px solid var(--line);padding-top:18px;}
.faq-a-in strong{color:var(--text);font-weight:600;}

/* ---------- 相关文章 ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card-x{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  transition:transform var(--ease-move),box-shadow var(--ease),border-color var(--ease);
}
.card-x:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#D6D0C7;}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:var(--r-img);margin:12px 12px 0;}
.card-media img{width:100%;height:100%;transition:transform var(--ease-move);}
.card-x:hover .card-media img{transform:scale(1.03);}
.card-body{padding:18px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto;}
.card-body h3{font-size:1.125rem;line-height:1.45;}
.card-body .card-desc{color:var(--text-2);font-size:.9375rem;line-height:1.75;}
.card-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap;align-items:center;
}
.card-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--muted);display:inline-block;}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;background:var(--ink-bg);color:#fff;overflow:hidden;
  border-top:1px solid var(--line-dark);
}
.cta-band::after{
  content:"";position:absolute;top:-40px;right:-80px;width:420px;height:420px;
  background:rgba(91,75,255,.06);transform:rotate(24deg);border-radius:40px;
}
.cta-in{position:relative;z-index:2;padding:76px 0;display:flex;flex-wrap:wrap;gap:32px;align-items:center;justify-content:space-between;}
.cta-copy{max-width:36em;}
.cta-copy h2{font-size:clamp(1.6rem,3vw,2.25rem);color:#fff;}
.cta-copy p{margin-top:14px;color:rgba(255,255,255,.72);}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-bg);color:rgba(255,255,255,.68);font-size:14.5px;}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:40px;
  padding:72px 0 44px;border-top:1px solid var(--line-dark);
}
.site-footer .brand-mark{background:rgba(255,255,255,.10);}
.site-footer .brand-name{color:#fff;}
.site-footer .brand-sub{color:rgba(255,255,255,.55);}
.footer-brand p{margin-top:18px;max-width:30em;line-height:1.85;color:rgba(255,255,255,.66);}
.footer-col h4,.footer-card h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:650;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a:hover{color:#fff;}
.footer-card{
  border:1px solid var(--line-dark);border-radius:var(--r-card);padding:24px;background:rgba(255,255,255,.02);
}
.footer-card p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);}
.footer-card .btn-primary-x{margin-top:18px;padding:12px 22px;font-size:14px;}
.footer-bottom{
  border-top:1px solid var(--line-dark);padding:22px 0 30px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 滚动入场 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 520ms var(--ease),transform 520ms var(--ease-move);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1399.98px){
  .container{max-width:1200px;}
}
@media (max-width:1100px){
  .faq-layout{grid-template-columns:220px minmax(0,1fr);gap:36px;}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:32px;}
  .footer-card{grid-column:1/-1;}
}
@media (max-width:991.98px){
  :root{--sect:72px;}
  .burger{display:block;}
  .nav-menu{
    position:fixed;inset:0;z-index:80;background:var(--surface);
    flex-direction:column;align-items:flex-start;gap:20px;
    padding:96px 24px 120px;margin:0;
    transform:translateX(100%);transition:transform var(--ease-move);
    overflow-y:auto;
  }
  .nav-menu.open{transform:none;}
  .nav-link{font-size:18px;height:auto;padding:8px 0;}
  .nav-link::after{bottom:2px;}
  .nav-cta{
    position:fixed;left:24px;right:24px;bottom:24px;z-index:90;
    height:50px;display:none;
  }
  body.nav-open .nav-cta{display:inline-flex;}
  body.nav-open{overflow:hidden;}
  .page-hero .hero-in{min-height:280px;padding:48px 0;}
  .faq-layout{grid-template-columns:minmax(0,1fr);gap:32px;}
  .faq-toc{position:static;}
  .faq-toc .toc-list{flex-direction:row;flex-wrap:wrap;border-left:0;gap:10px;}
  .faq-toc a{padding:8px 12px;border-left:0;border:1px solid var(--line);border-radius:var(--r-badge);margin:0;}
  .faq-toc a:hover{padding-left:12px;}
  .faq-toc a.active{border-color:var(--brand);background:var(--brand-tint);}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-in{padding:64px 0;}
}
@media (max-width:767.98px){
  body{font-size:16px;}
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .topbar .tb-mid{display:none;}
  .brand-sub{display:none;}
  .page-hero{border-radius:0;margin-top:16px;}
  .hero-in{min-height:280px;padding:44px 0;}
  .search-panel{padding:26px 20px;}
  .search-box{flex-wrap:wrap;padding:10px;}
  .search-box input{width:100%;flex:1 1 100%;padding:10px 6px;}
  .search-box .btn-primary-x{width:100%;}
  .faq-q{padding:18px 20px;font-size:1rem;}
  .faq-a-in{padding:0 20px 20px;}
  .faq-item.open .faq-a-in{padding-top:16px;}
  .related-grid{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:1fr;padding:56px 0 36px;}
  .cta-in{padding:56px 0;flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn-primary-x,.cta-actions .btn-ghost-dark{width:100%;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  h1,.page-hero h1{font-size:1.7rem;}
  .hero-actions{flex-direction:column;align-items:stretch;width:100%;}
  .hero-actions .btn-primary-x{width:100%;}
  .brand-name{font-size:14.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important;}
  .reveal{opacity:1;transform:none;}
}