/* roulang page: index */
:root{
  --ink-900:#16122B;
  --ink-700:#3A3552;
  --ink-500:#6B6580;
  --line:#E7E3F5;
  --bg:#FAF8FF;
  --surface:#FFFFFF;
  --brand-600:#5A3DF0;
  --brand-500:#7A5CFF;
  --brand-50:#F1ECFF;
  --accent-500:#FF8A3D;
  --accent-50:#FFF3E8;
  --mint-500:#12C2A0;
  --danger:#E5484D;
  --grad:linear-gradient(135deg,#5A3DF0 0%,#8C6BFF 52%,#FF8A3D 100%);
  --sh-1:0 2px 8px rgba(90,61,240,.06);
  --sh-2:0 12px 32px rgba(90,61,240,.10);
  --sh-3:0 20px 48px rgba(90,61,240,.16);
  --r-lg:24px;
  --r-md:20px;
  --r-sm:16px;
  --r-xs:14px;
  --ease:200ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;line-height:1.3}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
img{display:block;max-width:100%}
a{color:var(--brand-600);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand-500)}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--sh-1)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:-.2px}
.brand:hover{color:var(--ink-900)}
.brand-mark{width:26px;height:26px;border-radius:8px;background:var(--grad);display:grid;place-items:center;flex:none}
.brand-mark svg{width:14px;height:14px;fill:#fff}
.nav-links{display:flex;align-items:center;gap:28px;font-size:15px}
.nav-links a{position:relative;padding:6px 0;color:var(--ink-700);font-weight:500}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;border-radius:2px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform var(--ease)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a:hover,.nav-links a.active{color:var(--brand-600)}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-search{position:relative;display:flex;align-items:center}
.nav-search svg{position:absolute;left:13px;width:15px;height:15px;fill:var(--ink-500);pointer-events:none}
.nav-search input{width:220px;height:40px;border-radius:999px;border:1px solid var(--line);background:#fff;padding:0 16px 0 36px;font-size:14px;color:var(--ink-900);transition:border-color var(--ease),box-shadow var(--ease)}
.nav-search input::placeholder{color:rgba(107,101,128,.6)}
.nav-search input:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-50)}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;align-items:center;justify-content:center;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* mobile drawer */
.mobile-drawer{position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;background:#fff;z-index:90;transform:translateX(102%);transition:transform 260ms cubic-bezier(.4,0,.2,1);box-shadow:-16px 0 48px rgba(22,18,43,.18);display:flex;flex-direction:column;padding:20px}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-close{width:38px;height:38px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:18px;line-height:1;color:var(--ink-700)}
.drawer-nav a{display:flex;align-items:center;height:52px;border-bottom:1px solid var(--line);font-size:16px;color:var(--ink-900);font-weight:500}
.drawer-nav a.active{color:var(--brand-600)}
.drawer-foot{margin-top:auto;display:flex;flex-direction:column;gap:12px;padding-top:20px}
.drawer-foot .nav-search input{width:100%}
.drawer-mask{position:fixed;inset:0;background:rgba(22,18,43,.38);z-index:80;opacity:0;pointer-events:none;transition:opacity var(--ease)}
.drawer-mask.show{opacity:1;pointer-events:auto}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:999px;border:1px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease)}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3);filter:brightness(1.04)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 8px rgba(22,18,43,.24)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink-900)}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--sh-1)}
.btn-ghost:active{transform:translateY(0)}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;filter:saturate(.45)}
.text-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand-600)}
.text-link span{transition:transform var(--ease)}
.text-link:hover span{transform:translateX(4px)}
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;background:var(--brand-50);color:var(--brand-600);font-size:12px;font-weight:600;line-height:1.6}
.tag-orange{background:var(--accent-50);color:#C25B12}
.tag-mint{background:rgba(18,194,160,.12);color:#0A8F76}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:56px 0 0}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(80px);pointer-events:none}
.hero::before{width:420px;height:420px;left:-120px;top:-80px;background:rgba(90,61,240,.10)}
.hero::after{width:360px;height:360px;right:-100px;bottom:40px;background:rgba(255,138,61,.08)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.12fr 1fr;gap:52px;align-items:center;min-height:560px;padding-bottom:72px}
.hero-copy h1{font-size:clamp(30px,4.2vw,50px);font-weight:800;line-height:1.18;letter-spacing:-.5px;margin:18px 0 16px}
.hero-sub{font-size:17px;color:var(--ink-700);max-width:520px;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.trust-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--ink-500)}
.trust-row li{display:inline-flex;align-items:center;gap:8px}
.trust-row li+li::before{content:"/";color:var(--line);margin-right:8px}
.trust-row li::after{content:"";}
.trust-dot{width:16px;height:16px;border-radius:50%;background:var(--brand-50);display:inline-grid;place-items:center;flex:none}
.trust-dot svg{width:9px;height:9px;fill:var(--brand-600)}
.hero-visual{position:relative}
.hero-visual img{width:100%;height:430px;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--sh-2);background:var(--brand-50)}
.float-badge{position:absolute;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--sh-3);padding:12px 16px;display:flex;align-items:center;gap:12px}
.float-badge .fb-icon{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;flex:none;background:var(--brand-50)}
.float-badge .fb-icon svg{width:17px;height:17px;fill:var(--brand-600)}
.float-badge .fb-num{font-size:19px;font-weight:800;color:var(--ink-900);line-height:1.2;font-variant-numeric:tabular-nums}
.float-badge .fb-label{font-size:12px;color:var(--ink-500);line-height:1.4}
.badge-a{left:-18px;top:26px}
.badge-b{right:-12px;bottom:24px}
.badge-b .fb-icon{background:var(--accent-50)}
.badge-b .fb-icon svg{fill:var(--accent-500)}

/* ---------- stats bar ---------- */
.stats-wrap{position:relative;z-index:5;margin-top:-40px}
.stats-bar{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-2);display:grid;grid-template-columns:repeat(4,1fr);padding:26px 8px}
.stat{padding:6px 24px;border-left:1px solid var(--line)}
.stat:first-child{border-left:none}
.stat-num{font-size:30px;font-weight:800;color:var(--ink-900);line-height:1.2;font-variant-numeric:tabular-nums}
.stat-label{font-size:13px;color:var(--ink-500);margin-top:2px}
.stat-desc{font-size:13px;color:var(--ink-700);margin-top:6px}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-tight{padding:78px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,3vw,34px);letter-spacing:-.3px}
.section-head p{margin:10px 0 0;font-size:15px;color:var(--ink-500);max-width:600px}
.band{background:var(--brand-50);padding:88px 0}

/* capability */
.cap-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);position:relative}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);border-color:rgba(122,92,255,.35)}
.card:hover::before{transform:scaleX(1)}
.card::before{content:"";position:absolute;left:20px;right:20px;top:0;height:2px;border-radius:2px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform var(--ease)}
.cap-main{grid-row:span 2;padding:26px;display:flex;flex-direction:column;border-radius:var(--r-lg);box-shadow:var(--sh-2);border-color:rgba(90,61,240,.3)}
.cap-main img{width:100%;height:250px;object-fit:cover;border-radius:var(--r-sm);margin-bottom:22px;background:var(--brand-50)}
.cap-main h3{font-size:22px;margin-bottom:12px}
.cap-main p{font-size:15px;color:var(--ink-700)}
.cap-main .text-link{margin-top:auto;padding-top:18px}
.cap-side{display:grid;gap:24px;grid-template-rows:1fr 1fr}
.cap-side .card{padding:24px;display:flex;flex-direction:column}
.cap-side h3{font-size:19px;margin-bottom:10px}
.cap-side p{font-size:14px;color:var(--ink-500);margin-bottom:16px}
.cap-side .text-link{margin-top:auto;font-size:14px}
.point-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:24px}
.point{display:flex;align-items:flex-start;gap:12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-xs);padding:16px 18px;box-shadow:var(--sh-1)}
.point .p-icon{width:34px;height:34px;border-radius:10px;background:var(--brand-50);display:grid;place-items:center;flex:none}
.point .p-icon svg{width:16px;height:16px;fill:var(--brand-600)}
.point strong{display:block;font-size:15px;color:var(--ink-900);font-weight:600}
.point span{font-size:13px;color:var(--ink-500)}

/* advantage */
.adv-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center}
.adv-grid h2{font-size:clamp(24px,3vw,34px);margin-bottom:16px}
.adv-grid .text-link{margin-top:8px}
.badge-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.data-badge{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:22px;box-shadow:var(--sh-1);position:relative;overflow:hidden;transition:transform var(--ease),box-shadow var(--ease)}
.data-badge:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.data-badge::before{content:"";position:absolute;left:0;top:0;right:0;height:3px;background:var(--brand-600)}
.data-badge.orange::before{background:var(--accent-500)}
.data-badge.mint::before{background:var(--mint-500)}
.data-badge.mix::before{background:var(--grad)}
.data-badge .db-icon{width:36px;height:36px;border-radius:12px;background:var(--brand-50);display:grid;place-items:center;margin-bottom:14px}
.data-badge.orange .db-icon{background:var(--accent-50)}
.data-badge.mint .db-icon{background:rgba(18,194,160,.12)}
.data-badge svg{width:17px;height:17px;fill:var(--brand-600)}
.data-badge.orange svg{fill:var(--accent-500)}
.data-badge.mint svg{fill:var(--mint-500)}
.data-badge .db-num{font-size:28px;font-weight:800;color:var(--ink-900);line-height:1.2;font-variant-numeric:tabular-nums}
.data-badge .db-text{font-size:13px;color:var(--ink-500);margin-top:4px}

/* cases */
.case-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:64px}
.case-row:last-child{margin-bottom:0}
.case-row.flip .case-media{order:2}
.case-media img{width:100%;height:320px;object-fit:cover;border-radius:var(--r-md);box-shadow:var(--sh-2);background:var(--brand-50)}
.case-body h3{font-size:22px;margin-bottom:12px}
.case-body p{font-size:15px;color:var(--ink-700);margin-bottom:16px}
.case-tags{display:flex;flex-wrap:wrap;gap:8px}

/* news */
.news-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:28px;align-items:start}
.news-feature{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-2);padding:22px;transition:transform var(--ease),box-shadow var(--ease)}
.news-feature:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.news-feature img{width:100%;height:230px;object-fit:cover;border-radius:var(--r-sm);margin-bottom:20px;background:var(--brand-50)}
.news-feature h3{font-size:21px;margin:14px 0 10px;line-height:1.45}
.news-feature p{font-size:14px;color:var(--ink-500)}
.news-feature .news-meta{margin-top:18px}
.news-grid>.news-feature:only-child{grid-column:1/-1}
.news-side{display:grid;gap:16px}
.news-row{display:grid;grid-template-columns:96px 1fr;gap:16px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);color:inherit}
.news-row:hover{transform:translateY(-4px);box-shadow:var(--sh-3);border-color:rgba(122,92,255,.35);color:inherit}
.news-row img{width:96px;height:72px;object-fit:cover;border-radius:12px;background:var(--brand-50)}
.news-row .nr-title{font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-row .nr-desc{font-size:13px;color:var(--ink-500);margin-top:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--ink-500)}
.news-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.empty-state{grid-column:1/-1;min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;background:#fff;border:1px dashed var(--line);border-radius:var(--r-lg);padding:32px;text-align:center}
.empty-icon{width:48px;height:48px;border-radius:50%;background:var(--brand-50);display:grid;place-items:center}
.empty-icon svg{width:22px;height:22px;fill:var(--brand-500)}
.empty-state p{margin:0;font-size:15px;color:var(--ink-500)}

/* channels */
.channel-grid{display:grid;grid-template-columns:1.45fr 1fr;gap:32px;align-items:start}
.channel-list{display:grid;gap:0}
.channel-item{display:grid;grid-template-columns:64px 1fr auto;gap:18px;align-items:start;padding:26px 0;border-bottom:1px solid var(--line)}
.channel-item:first-child{padding-top:0}
.channel-item:last-child{border-bottom:none}
.channel-num{font-size:32px;font-weight:800;line-height:1;color:rgba(122,92,255,.32);font-variant-numeric:tabular-nums}
.channel-item h3{font-size:18px;margin-bottom:6px}
.channel-item p{font-size:14px;color:var(--ink-500);margin:0}
.channel-item .arrow{color:var(--brand-600);font-size:18px;transition:transform var(--ease)}
.channel-item:hover .arrow{transform:translateX(4px)}
.channel-cta{background:var(--brand-50);border:1px solid rgba(90,61,240,.16);border-radius:var(--r-lg);padding:32px;box-shadow:var(--sh-1)}
.channel-cta h3{font-size:20px;margin-bottom:12px}
.channel-cta p{font-size:14px;color:var(--ink-700);margin-bottom:22px}
.channel-cta .btn{width:100%}

/* faq */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.faq-grid h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.faq-grid .faq-intro{font-size:15px;color:var(--ink-500);margin-bottom:20px}
.faq-list{display:grid;gap:14px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);padding:0 20px;box-shadow:var(--sh-1);transition:border-color var(--ease),box-shadow var(--ease);position:relative}
.faq-item[open]{border-color:var(--brand-500);box-shadow:var(--sh-2)}
.faq-item[open]::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--grad)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;font-size:17px;font-weight:600;color:var(--ink-900)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-plus{width:24px;height:24px;flex:none;border-radius:50%;background:var(--brand-50);color:var(--brand-600);display:grid;place-items:center;font-size:16px;line-height:1;transition:transform var(--ease)}
.faq-item[open] .faq-plus{transform:rotate(45deg)}
.faq-answer{padding:0 0 18px;font-size:15px;line-height:1.85;color:var(--ink-700)}

/* contact */
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-2);padding:36px;display:grid;grid-template-columns:5fr 7fr;gap:44px}
.contact-card h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:14px}
.contact-card .lead{font-size:15px;color:var(--ink-500);margin-bottom:24px}
.contact-line{display:flex;align-items:center;gap:12px;font-size:15px;color:var(--ink-700);padding:12px 0;border-bottom:1px dashed var(--line)}
.contact-line:last-child{border-bottom:none}
.contact-line .c-icon{width:34px;height:34px;border-radius:10px;background:var(--brand-50);display:grid;place-items:center;flex:none}
.contact-line .c-icon svg{width:16px;height:16px;fill:var(--brand-600)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:14px;font-weight:600;color:var(--ink-900)}
.field .req{color:var(--accent-500);margin-left:2px}
.field input,.field select,.field textarea{width:100%;height:46px;border:1px solid var(--line);border-radius:var(--r-xs);background:#fff;padding:0 14px;font-size:15px;color:var(--ink-900);transition:border-color var(--ease),box-shadow var(--ease)}
.field textarea{height:118px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(107,101,128,.6)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-50)}
.field select{appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath fill='%236B6580' d='M6 8 0 1.4 1.4 0 6 5.2 10.6 0 12 1.4z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;background-size:11px;padding-right:38px}
.check-row{grid-column:1/-1;display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--ink-500)}
.check-row input{width:16px;height:16px;margin-top:3px;flex:none;accent-color:var(--brand-600);height:16px}
.form-actions{grid-column:1/-1;display:flex;flex-direction:column;gap:10px}
.form-actions .btn{width:100%}
.form-note{font-size:12px;color:var(--ink-500)}

/* footer */
.site-footer{background:#1B1730;color:rgba(255,255,255,.72);position:relative;margin-top:0}
.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--grad)}
.footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding:64px 0 44px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;margin-bottom:14px}
.footer-brand:hover{color:#fff}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);margin-bottom:18px}
.footer-contact{font-size:13px;color:rgba(255,255,255,.55);line-height:1.9}
.footer-col h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.66);padding:6px 0;transition:color var(--ease)}
.footer-col a:hover{color:var(--mint-500);text-decoration:underline}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;font-size:13px;color:rgba(255,255,255,.55);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between}
.footer-bottom .note{max-width:640px}
.site-footer .tag{background:rgba(255,255,255,.08);color:rgba(255,255,255,.72)}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 26px}
  .hero-grid{gap:40px}
}
@media (max-width:1024px){
  .container{padding:0 24px}
  .nav-links{display:none}
  .nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .nav-right .btn{display:none}
  .hero-grid{grid-template-columns:1fr;min-height:0;padding-bottom:64px;gap:36px}
  .hero-visual img{height:340px}
  .badge-a{left:8px;top:12px}
  .badge-b{right:8px;bottom:12px}
  .stats-bar{grid-template-columns:repeat(2,1fr);padding:18px 4px}
  .stat{border-left:none;border-top:1px solid var(--line);padding:16px 22px}
  .stat:nth-child(1),.stat:nth-child(2){border-top:none}
  .section{padding:76px 0}
  .band{padding:72px 0}
  .cap-grid{grid-template-columns:1fr}
  .cap-main{grid-row:auto}
  .cap-side{grid-template-rows:auto auto;grid-template-columns:1fr 1fr}
  .point-row{grid-template-columns:1fr 1fr}
  .adv-grid{grid-template-columns:1fr;gap:32px}
  .case-row{grid-template-columns:1fr;gap:28px;margin-bottom:48px}
  .case-row.flip .case-media{order:0}
  .news-grid{grid-template-columns:1fr}
  .channel-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr;gap:28px}
  .contact-card{grid-template-columns:1fr;padding:28px;gap:28px}
  .footer-main{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 36px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .nav-wrap{height:60px}
  .brand{font-size:15px}
  .hero{padding-top:36px}
  .hero-copy h1{font-size:clamp(26px,7vw,34px)}
  .hero-sub{font-size:16px}
  .hero-visual img{height:250px}
  .float-badge{padding:10px 12px;border-radius:14px}
  .float-badge .fb-num{font-size:16px}
  .stats-wrap{margin-top:-24px}
  .stat-num{font-size:24px}
  .cap-side{grid-template-columns:1fr}
  .point-row{grid-template-columns:1fr}
  .badge-grid{grid-template-columns:1fr 1fr}
  .section{padding:56px 0}
  .band{padding:52px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:26px}
  .case-media img{height:220px}
  .news-row{grid-template-columns:78px 1fr;padding:12px}
  .news-row img{width:78px;height:64px}
  .faq-item summary{font-size:16px;padding:16px 0}
  .form-grid{grid-template-columns:1fr}
  .footer-main{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column}
  .channel-num{font-size:26px}
  .channel-item{grid-template-columns:48px 1fr auto;gap:14px;padding:20px 0}
}
@media (max-width:479px){
  .hero-actions .btn{width:100%}
  .hero-actions{flex-direction:column;align-items:stretch}
  .btn{height:44px;font-size:14px}
  .badge-grid{grid-template-columns:1fr}
  .news-feature img{height:180px}
  .faq-item{padding:0 16px}
  .contact-card{padding:22px}
  .trust-row{font-size:12px}
}

/* roulang page: category1 */
:root{
  --ink-900:#16122B;
  --ink-700:#3A3552;
  --ink-500:#6B6580;
  --line:#E7E3F5;
  --bg:#FAF8FF;
  --surface:#FFFFFF;
  --brand-600:#5A3DF0;
  --brand-500:#7A5CFF;
  --brand-50:#F1ECFF;
  --accent-500:#FF8A3D;
  --accent-50:#FFF3E8;
  --mint-500:#12C2A0;
  --danger:#E5484D;
  --grad:linear-gradient(135deg,#5A3DF0 0%,#8C6BFF 52%,#FF8A3D 100%);
  --sh-1:0 2px 8px rgba(90,61,240,.06);
  --sh-2:0 12px 32px rgba(90,61,240,.10);
  --sh-3:0 20px 48px rgba(90,61,240,.16);
  --r-lg:24px;
  --r-md:20px;
  --r-sm:16px;
  --r-xs:14px;
  --ease:200ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-700);
  font-family:-apple-system,'PingFang SC','HarmonyOS Sans SC','Microsoft YaHei','Noto Sans SC',sans-serif;
  font-size:16.5px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--brand-600);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand-500);}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent-500);
  outline-offset:2px;
  border-radius:6px;
}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:-.2px;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.15em;}
li{margin-bottom:.4em;line-height:1.72;}
button{font-family:inherit;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
  transition:box-shadow var(--ease);
}
.site-header.scrolled{box-shadow:0 6px 20px rgba(90,61,240,.10);}
.header-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  font-size:17px;
  color:var(--ink-900);
  letter-spacing:-.2px;
  white-space:nowrap;
}
.brand:hover{color:var(--ink-900);}
.brand-mark{
  width:24px;height:24px;border-radius:8px;
  background:var(--grad);
  display:inline-flex;align-items:center;justify-content:center;
  flex:0 0 auto;
}
.brand-mark svg{width:14px;height:14px;fill:#fff;}
.nav-links{
  display:flex;
  align-items:center;
  gap:28px;
  margin-left:8px;
  flex:1 1 auto;
}
.nav-links a{
  position:relative;
  font-size:15px;
  color:var(--ink-700);
  padding:6px 0;
  white-space:nowrap;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--grad);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--ease);
}
.nav-links a:hover{color:var(--brand-600);}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--brand-600);font-weight:600;}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
  flex:0 0 auto;
}
.search-box{
  display:flex;
  align-items:center;
  gap:8px;
  height:40px;
  width:220px;
  padding:0 14px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.search-box:focus-within{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px var(--brand-50);
}
.search-box svg{width:15px;height:15px;fill:var(--ink-500);flex:0 0 auto;}
.search-box input{
  border:0;outline:none;background:transparent;
  font-size:14px;color:var(--ink-900);width:100%;
}
.search-box input::placeholder{color:rgba(107,101,128,.6);}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:0;
  cursor:pointer;
  border-radius:999px;
  font-weight:600;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  text-align:center;
}
.btn-primary{
  background:var(--grad);
  color:#fff;
  height:40px;
  padding:0 20px;
  font-size:15px;
  box-shadow:var(--sh-2);
}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3);filter:brightness(1.05);}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(0,0,0,.18);}
.btn-lg{height:48px;padding:0 28px;font-size:16px;}
.btn-ghost{
  background:var(--surface);
  color:var(--ink-900);
  border:1px solid var(--line);
  height:48px;
  padding:0 26px;
  font-size:16px;
}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-600);transform:translateY(-2px);}
.btn[disabled],.btn.is-disabled{opacity:.45;filter:saturate(.45);pointer-events:none;}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line);
  background:var(--surface);
  border-radius:12px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-900);transition:transform var(--ease),opacity var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;
  top:0;right:0;
  width:84vw;max-width:360px;height:100%;
  background:var(--surface);
  z-index:90;
  transform:translateX(100%);
  transition:transform 240ms cubic-bezier(.4,0,.2,1);
  box-shadow:-20px 0 48px rgba(22,18,43,.18);
  display:flex;
  flex-direction:column;
  padding:20px 20px 24px;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.drawer-close{
  width:38px;height:38px;border-radius:12px;border:1px solid var(--line);
  background:var(--surface);font-size:20px;line-height:1;color:var(--ink-700);cursor:pointer;
}
.drawer-nav{display:flex;flex-direction:column;}
.drawer-nav a{
  display:flex;align-items:center;
  min-height:52px;
  border-bottom:1px solid var(--line);
  color:var(--ink-900);
  font-size:16px;
}
.drawer-nav a.active{color:var(--brand-600);font-weight:600;}
.drawer-foot{margin-top:auto;padding-top:20px;display:flex;flex-direction:column;gap:12px;}
.drawer-foot .search-box{width:100%;}
.drawer-foot .btn-primary{width:100%;height:46px;}
.backdrop{
  position:fixed;inset:0;background:rgba(22,18,43,.42);
  z-index:80;opacity:0;pointer-events:none;transition:opacity var(--ease);
}
.backdrop.show{opacity:1;pointer-events:auto;}

/* ---------- page hero ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  background-image:url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  isolation:isolate;
}
.page-hero::before{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(90,61,240,.90) 0%,rgba(122,92,255,.80) 52%,rgba(255,138,61,.72) 100%);
  z-index:-1;
}
.page-hero::after{
  content:"";
  position:absolute;
  width:420px;height:420px;
  right:-120px;top:-140px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.30),transparent 68%);
  z-index:-1;
}
.hero-inner{padding:34px 0 54px;color:#fff;position:relative;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:rgba(255,255,255,.82);
  margin-bottom:22px;
}
.breadcrumb a{color:rgba(255,255,255,.92);}
.breadcrumb a:hover{color:#fff;text-decoration:underline;}
.breadcrumb span.sep{opacity:.6;}
.hero-inner h1{
  color:#fff;
  font-size:clamp(28px,4.2vw,48px);
  line-height:1.2;
  font-weight:800;
  letter-spacing:-.5px;
  max-width:900px;
}
.hero-sub{
  margin:16px 0 22px;
  font-size:17px;
  line-height:1.75;
  color:rgba(255,255,255,.92);
  max-width:720px;
}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 14px;
  border-radius:999px;
  font-size:12.5px;
  background:var(--brand-50);
  color:var(--brand-600);
  font-weight:600;
  letter-spacing:.2px;
}
.hero-tags .tag{
  background:rgba(255,255,255,.18);
  color:#fff;
  border:1px solid rgba(255,255,255,.36);
  backdrop-filter:blur(2px);
}

/* ---------- sections ---------- */
.section{padding:88px 0;}
.section--tight{padding:64px 0;}
.section--soft{background:var(--brand-50);}
.section-head{max-width:760px;margin-bottom:44px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);
  background:var(--brand-50);
  border-radius:999px;
  padding:5px 14px;
  margin-bottom:16px;
}
.section--soft .eyebrow{background:#fff;}
.section-head h2{
  font-size:clamp(24px,3vw,34px);
  line-height:1.3;
  margin-bottom:14px;
}
.section-head p{margin:0;color:var(--ink-700);max-width:680px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-weight:600;font-size:15px;color:var(--brand-600);
}
.text-link svg{width:14px;height:14px;fill:currentColor;transition:transform var(--ease);}
.text-link:hover svg{transform:translateX(4px);}

/* ---------- steps ---------- */
.steps-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  position:relative;
}
.step-card{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:26px 22px 24px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);border-color:rgba(122,92,255,.4);}
.step-num{
  width:44px;height:44px;
  border-radius:14px;
  background:var(--grad);
  color:#fff;
  font-weight:800;
  font-size:17px;
  display:flex;align-items:center;justify-content:center;
  font-variant-numeric:tabular-nums;
  margin-bottom:16px;
  box-shadow:0 6px 16px rgba(90,61,240,.24);
}
.step-card h3{font-size:18px;margin-bottom:8px;}
.step-card p{font-size:14.5px;color:var(--ink-500);margin:0;line-height:1.72;}
.step-line{
  position:absolute;
  top:48px;left:calc(25% + 8px);
  width:calc(50% - 16px);
  height:0;
  border-top:2px dashed rgba(122,92,255,.35);
  pointer-events:none;
}

/* ---------- checklist ---------- */
.split{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:56px;
  align-items:start;
}
.check-card{
  background:var(--surface);
  border-radius:var(--r-lg);
  border:1px solid var(--line);
  box-shadow:var(--sh-2);
  padding:32px;
}
.check-list{list-style:none;margin:0;padding:0;}
.check-list li{
  display:flex;gap:14px;
  padding:16px 0;
  border-bottom:1px solid var(--line);
  margin:0;
}
.check-list li:last-child{border-bottom:0;padding-bottom:0;}
.check-list li:first-child{padding-top:0;}
.check-ico{
  flex:0 0 auto;
  width:26px;height:26px;border-radius:9px;
  background:rgba(18,194,160,.12);
  display:flex;align-items:center;justify-content:center;
  margin-top:3px;
}
.check-ico svg{width:14px;height:14px;fill:var(--mint-500);}
.check-list strong{display:block;font-size:16px;color:var(--ink-900);margin-bottom:3px;}
.check-list span{font-size:14.5px;color:var(--ink-500);line-height:1.7;}

/* ---------- alternating feature ---------- */
.feature-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  margin-bottom:80px;
}
.feature-row:last-child{margin-bottom:0;}
.feature-row.reverse .feature-media{order:2;}
.feature-media{
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--sh-2);
  background:var(--brand-50);
  aspect-ratio:16/10;
}
.feature-media img{width:100%;height:100%;object-fit:cover;}
.feature-body h3{font-size:22px;margin-bottom:14px;}
.feature-body p{color:var(--ink-700);margin-bottom:14px;}
.mini-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px;}
.mini-tags .tag{background:var(--accent-50);color:#C25A15;}

/* ---------- stumble cards ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  box-shadow:var(--sh-1);
  padding:26px;
  transition:transform var(--ease),box-shadow var(--ease);
  position:relative;
  overflow:hidden;
}
.card::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--grad);
  opacity:0;
  transition:opacity var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);}
.card:hover::before{opacity:1;}
.card h3{font-size:18px;margin-bottom:10px;}
.card p{margin:0;font-size:14.8px;color:var(--ink-500);line-height:1.75;}
.card .card-ico{
  width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-50);
  margin-bottom:14px;
}
.card .card-ico svg{width:18px;height:18px;fill:var(--brand-600);}

/* ---------- cta strip ---------- */
.cta-strip{
  background:var(--brand-50);
  border-radius:var(--r-lg);
  border:1px solid rgba(122,92,255,.22);
  padding:40px 44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  box-shadow:var(--sh-1);
}
.cta-strip h2{font-size:clamp(21px,2.6vw,27px);margin-bottom:10px;}
.cta-strip p{margin:0;color:var(--ink-700);font-size:15.5px;max-width:640px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:0 0 auto;}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  background:#1B1730;
  color:rgba(255,255,255,.72);
  margin-top:88px;
  padding-top:2px;
}
.site-footer::before{
  content:"";
  position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--grad);
}
.footer-main{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:40px;
  padding:64px 0 48px;
}
.footer-brand{
  display:inline-flex;align-items:center;gap:10px;
  color:#fff;font-weight:700;font-size:17px;margin-bottom:16px;
}
.footer-brand:hover{color:#fff;}
.footer-desc{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.62);max-width:320px;margin-bottom:14px;}
.footer-contact{font-size:13.5px;line-height:1.9;color:rgba(255,255,255,.55);margin:0;}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:600;}
.footer-col a{
  display:block;
  color:rgba(255,255,255,.66);
  font-size:14.5px;
  padding:5px 0;
}
.footer-col a:hover{color:var(--mint-500);text-decoration:underline;}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:20px;
  flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.10);
  padding:20px 0 28px;
  font-size:13px;
  color:rgba(255,255,255,.55);
}
.footer-bottom .note{max-width:600px;}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 24px;}
  .header-inner{gap:18px;}
  .nav-links{gap:20px;}
  .search-box{width:180px;}
}
@media (max-width:1023px){
  .nav-links{display:none;}
  .header-actions .search-box{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .header-actions{margin-left:0;}
  .section{padding:72px 0;}
  .section--tight{padding:56px 0;}
  .steps-grid{grid-template-columns:repeat(2,1fr);}
  .step-line{display:none;}
  .split{grid-template-columns:1fr;gap:36px;}
  .feature-row{grid-template-columns:1fr;gap:28px;margin-bottom:56px;}
  .feature-row.reverse .feature-media{order:0;}
  .feature-media{aspect-ratio:16/9;}
  .cta-strip{flex-direction:column;align-items:flex-start;padding:32px;}
  .footer-main{grid-template-columns:1fr 1fr;gap:32px;padding:52px 0 36px;}
  .site-footer{margin-top:64px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .header-inner{height:60px;}
  .brand{font-size:15.5px;}
  .hero-inner{padding:26px 0 42px;}
  .hero-sub{font-size:15.5px;}
  .section{padding:56px 0;}
  .section--tight{padding:44px 0;}
  .section-head{margin-bottom:30px;}
  .steps-grid{grid-template-columns:1fr;gap:16px;}
  .grid-2{grid-template-columns:1fr;}
  .check-card{padding:24px;}
  .footer-main{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:10px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
}
@media (max-width:479px){
  .hero-inner h1{font-size:26px;}
  .brand{font-size:14.5px;}
  .btn-lg{height:46px;padding:0 20px;font-size:15px;}
  .step-card{padding:22px 18px;}
  .card{padding:22px 18px;}
  .cta-strip{padding:26px 20px;}
}

/* roulang page: article */
:root{
  --ink-900:#16122B;
  --ink-700:#3A3552;
  --ink-500:#6B6580;
  --line:#E7E3F5;
  --bg:#FAF8FF;
  --surface:#FFFFFF;
  --brand-600:#5A3DF0;
  --brand-500:#7A5CFF;
  --brand-50:#F1ECFF;
  --accent-500:#FF8A3D;
  --accent-50:#FFF3E8;
  --mint-500:#12C2A0;
  --danger:#E5484D;
  --grad:linear-gradient(135deg,#5A3DF0 0%,#8C6BFF 52%,#FF8A3D 100%);
  --radius-lg:24px;
  --radius-md:20px;
  --radius-sm:14px;
  --sh-1:0 2px 8px rgba(90,61,240,.06);
  --sh-2:0 12px 32px rgba(90,61,240,.10);
  --sh-3:0 20px 48px rgba(90,61,240,.16);
  --t:200ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.78;
  color:var(--ink-700);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-600);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--brand-500)}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0}
button{font-family:inherit}
input,button,select,textarea{font-family:inherit;font-size:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent-500);
  outline-offset:2px;
  border-radius:8px;
}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  color:var(--ink-900);
  white-space:nowrap;
}
.brand:hover{color:var(--ink-900)}
.brand-mark{
  width:24px;height:24px;flex:0 0 24px;
  border-radius:8px;
  background:var(--grad);
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 4px 10px rgba(90,61,240,.28);
}
.brand-mark svg{width:14px;height:14px;fill:#fff}
.nav-links{
  display:flex;
  align-items:center;
  gap:28px;
  font-size:15px;
}
.nav-links > a{
  position:relative;
  color:var(--ink-700);
  padding:6px 0;
  font-weight:500;
}
.nav-links > a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--grad);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--t);
}
.nav-links > a:hover{color:var(--brand-600)}
.nav-links > a:hover::after,
.nav-links > a.active::after{transform:scaleX(1)}
.nav-links > a.active{color:var(--brand-600);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-search{
  display:flex;
  align-items:center;
  gap:8px;
  height:40px;
  width:220px;
  padding:0 14px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:999px;
  transition:border-color var(--t),box-shadow var(--t);
}
.nav-search:focus-within{
  border-color:var(--brand-500);
  box-shadow:0 0 0 3px var(--brand-50);
}
.nav-search svg{width:16px;height:16px;flex:0 0 16px;stroke:var(--ink-500);fill:none;stroke-width:2}
.nav-search input{
  border:0;outline:none;background:transparent;
  width:100%;font-size:14px;color:var(--ink-900);
}
.nav-search input::placeholder{color:rgba(107,101,128,.6)}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:0;
  cursor:pointer;
  font-weight:600;
  border-radius:999px;
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
  text-align:center;
  white-space:nowrap;
}
.btn-primary{
  background:var(--grad);
  color:#fff;
  height:42px;
  padding:0 22px;
  font-size:15px;
  box-shadow:var(--sh-2);
}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3);filter:brightness(1.05)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(22,18,43,.20)}
.btn-primary[disabled]{opacity:.45;filter:saturate(.45);pointer-events:none}
.btn-ghost{
  background:var(--surface);
  color:var(--ink-900);
  border:1px solid var(--line);
  height:42px;
  padding:0 22px;
  font-size:15px;
}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--sh-1)}
.btn-block{width:100%}
.nav-cta{height:40px;padding:0 20px;font-size:14px}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--surface);
  align-items:center;justify-content:center;
  flex-direction:column;gap:5px;
  cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-700);transition:var(--t)}
.nav-mobile-extra{display:none}
/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:nowrap;
  overflow:hidden;
  font-size:13px;
  color:var(--ink-500);
  padding:26px 0 0;
}
.breadcrumb a{color:var(--ink-500)}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{color:rgba(107,101,128,.5)}
.breadcrumb .current{
  color:var(--ink-700);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  max-width:46%;
}
/* ============ 文章头部 ============ */
.article-section{padding-bottom:72px}
.article-head{max-width:880px;margin:26px auto 0;text-align:left}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:var(--brand-50);
  color:var(--brand-600);
  font-size:12px;
  font-weight:600;
  border-radius:999px;
  padding:5px 14px;
  line-height:1.4;
}
.article-head h1{
  font-size:clamp(28px,3.4vw,40px);
  line-height:1.26;
  font-weight:800;
  letter-spacing:-.5px;
  color:var(--ink-900);
  margin:16px 0 14px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:var(--ink-500);
}
.article-meta .dot{color:rgba(107,101,128,.45)}
.article-cover{
  max-width:880px;
  margin:28px auto 0;
  border-radius:var(--radius-md);
  overflow:hidden;
  box-shadow:var(--sh-2);
  background:var(--brand-50);
}
.article-cover img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}
/* ============ 正文 ============ */
.article-body{
  max-width:780px;
  margin:40px auto 0;
  font-size:17px;
  line-height:1.9;
  color:var(--ink-700);
  word-break:break-word;
}
.article-body p{margin:0 0 1em}
.article-body h2{
  position:relative;
  font-size:22px;
  font-weight:700;
  line-height:1.4;
  color:var(--ink-900);
  margin:38px 0 16px;
  padding-left:16px;
}
.article-body h2::before{
  content:"";
  position:absolute;
  left:0;top:6px;bottom:6px;
  width:4px;
  border-radius:4px;
  background:linear-gradient(180deg,#5A3DF0 0%,#FF8A3D 100%);
}
.article-body h3{
  font-size:19px;
  font-weight:600;
  line-height:1.5;
  color:var(--ink-900);
  margin:28px 0 12px;
}
.article-body h4{
  font-size:17px;
  font-weight:600;
  color:var(--ink-900);
  margin:22px 0 10px;
}
.article-body a{
  color:var(--brand-600);
  text-decoration:underline;
  text-underline-offset:3px;
  text-decoration-thickness:1px;
}
.article-body a:hover{color:var(--brand-500)}
.article-body strong{color:var(--ink-900);font-weight:600}
.article-body img{
  max-width:100%;
  height:auto;
  border-radius:16px;
  margin:24px auto;
  box-shadow:var(--sh-1);
}
.article-body figure{margin:24px 0}
.article-body figcaption{
  font-size:13px;
  color:var(--ink-500);
  text-align:center;
  margin-top:10px;
}
.article-body ul,
.article-body ol{
  margin:0 0 1em;
  padding-left:0;
  line-height:1.75;
}
.article-body ul{list-style:none}
.article-body ul li{
  position:relative;
  padding-left:22px;
  margin-bottom:8px;
}
.article-body ul li::before{
  content:"";
  position:absolute;
  left:4px;top:.72em;
  width:7px;height:7px;
  border-radius:50%;
  background:linear-gradient(135deg,#5A3DF0 0%,#FF8A3D 100%);
}
.article-body ol{
  list-style:decimal;
  padding-left:24px;
}
.article-body ol li{
  margin-bottom:8px;
  padding-left:4px;
}
.article-body ol li::marker{color:var(--brand-600);font-weight:700}
.article-body blockquote{
  background:var(--brand-50);
  border-left:4px solid var(--brand-500);
  border-radius:12px;
  padding:18px 20px;
  margin:24px 0;
  font-size:15px;
  line-height:1.85;
  color:var(--ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:15px;
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
}
.article-body th{
  background:var(--brand-50);
  color:var(--ink-900);
  font-weight:600;
  text-align:left;
}
.article-body th,
.article-body td{
  border:1px solid var(--line);
  padding:11px 14px;
}
.article-body hr{
  border:0;
  height:1px;
  background:var(--line);
  margin:32px 0;
}
.article-empty{
  text-align:center;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:48px 28px;
  box-shadow:var(--sh-1);
}
.article-empty .empty-title{
  font-size:20px;
  font-weight:700;
  color:var(--ink-900);
  margin-bottom:10px;
}
.article-empty .empty-desc{
  font-size:15px;
  color:var(--ink-500);
  margin-bottom:22px;
  line-height:1.8;
}
/* ============ 标签 ============ */
.article-tags{
  max-width:780px;
  margin:40px auto 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  padding-top:24px;
  border-top:1px solid var(--line);
}
.tag-label{font-size:13px;color:var(--ink-500);margin-right:2px}
.tag{
  display:inline-flex;
  align-items:center;
  background:var(--brand-50);
  color:var(--brand-600);
  font-size:12px;
  font-weight:600;
  border-radius:999px;
  padding:5px 14px;
  line-height:1.4;
  transition:background var(--t),color var(--t);
}
.tag:hover{background:var(--brand-500);color:#fff}
/* ============ 相关推荐 ============ */
.related-section{padding:8px 0 72px}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:16px;
  margin-bottom:24px;
}
.section-head h2{
  font-size:clamp(22px,2.4vw,28px);
  font-weight:700;
  color:var(--ink-900);
  line-height:1.35;
}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--brand-600);
}
.link-more span{transition:transform var(--t)}
.link-more:hover span{transform:translateX(4px)}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.rel-card{
  display:flex;
  gap:16px;
  align-items:flex-start;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:16px;
  box-shadow:var(--sh-1);
  color:var(--ink-700);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.rel-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--sh-3);
  border-color:rgba(90,61,240,.35);
  color:var(--ink-700);
}
.rel-card img{
  width:96px;
  height:72px;
  flex:0 0 96px;
  object-fit:cover;
  border-radius:12px;
  background:var(--brand-50);
}
.rel-card .rel-body{min-width:0}
.rel-card h3{
  font-size:16px;
  font-weight:600;
  color:var(--ink-900);
  line-height:1.45;
  margin-bottom:6px;
}
.rel-card p{
  font-size:13px;
  color:var(--ink-500);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rel-card .rel-meta{
  display:flex;
  align-items:center;
  gap:8px;
  margin-top:10px;
  font-size:12px;
  color:var(--ink-500);
}
.rel-card .rel-meta .tag{padding:3px 10px;font-size:11px}
/* ============ 底部引导条 ============ */
.cta-section{padding-bottom:72px}
.cta-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  background:var(--brand-50);
  border:1px solid rgba(90,61,240,.16);
  border-radius:var(--radius-lg);
  padding:36px 40px;
}
.cta-bar h2{
  font-size:clamp(20px,2.2vw,26px);
  font-weight:700;
  color:var(--ink-900);
  line-height:1.35;
  margin-bottom:8px;
}
.cta-bar p{
  font-size:15px;
  color:var(--ink-500);
  line-height:1.8;
  max-width:620px;
}
.back-entry{
  padding:0 0 80px;
  text-align:center;
}
.back-entry::before{
  content:"";
  display:block;
  height:1px;
  max-width:780px;
  margin:0 auto 32px;
  background:linear-gradient(90deg,rgba(90,61,240,0),rgba(90,61,240,.45),rgba(255,138,61,.45),rgba(255,138,61,0));
}
.link-back{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--brand-600);
}
.link-back span{transition:transform var(--t)}
.link-back:hover span{transform:translateX(4px)}
/* ============ 页脚 ============ */
.site-footer{
  background:#1B1730;
  color:rgba(255,255,255,.72);
  border-top:2px solid transparent;
  border-image:linear-gradient(90deg,#5A3DF0,#8C6BFF,#FF8A3D) 1;
  padding-top:64px;
}
.footer-main{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:48px;
}
.footer-brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  color:#fff;
  margin-bottom:16px;
}
.footer-brand:hover{color:#fff}
.footer-desc{
  font-size:14px;
  line-height:1.85;
  color:rgba(255,255,255,.62);
  max-width:320px;
  margin-bottom:14px;
}
.footer-contact{
  font-size:13px;
  line-height:1.9;
  color:rgba(255,255,255,.5);
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
}
.footer-col a{
  display:block;
  font-size:14px;
  color:rgba(255,255,255,.62);
  margin-bottom:11px;
}
.footer-col a:hover{color:var(--mint-500);text-decoration:underline}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  border-top:1px solid rgba(255,255,255,.10);
  padding:22px 0 30px;
  font-size:13px;
  color:rgba(255,255,255,.55);
}
.footer-bottom .note{color:rgba(255,255,255,.45)}
/* ============ 响应式 ============ */
@media (max-width:1280px){
  .container{padding:0 28px}
}
@media (max-width:1024px){
  .container{padding:0 24px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .cta-bar{padding:32px}
  .footer-main{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:900px){
  .nav-links{
    position:fixed;
    top:72px;
    right:0;
    width:84vw;
    max-width:340px;
    height:calc(100vh - 72px);
    background:var(--surface);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:12px 22px 36px;
    border-left:1px solid var(--line);
    box-shadow:-12px 0 40px rgba(22,18,43,.14);
    transform:translateX(105%);
    transition:transform var(--t);
    z-index:60;
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0)}
  .nav-links > a{
    display:block;
    padding:15px 2px;
    font-size:16px;
    border-bottom:1px solid var(--line);
    color:var(--ink-900);
  }
  .nav-links > a::after{display:none}
  .nav-links > a.active{color:var(--brand-600)}
  .nav-search{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .nav-mobile-extra{display:block;margin-top:22px}
  .nav-mobile-extra .nav-search{
    display:flex;
    width:100%;
    margin-bottom:14px;
  }
  .article-head{margin-top:20px}
  .article-cover{margin-top:22px}
  .article-body{margin-top:32px;font-size:16.5px;line-height:1.85}
  .related-grid{grid-template-columns:1fr}
  .cta-bar{flex-direction:column;align-items:flex-start;gap:20px}
  .breadcrumb .current{max-width:38%}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .article-section{padding-bottom:56px}
  .article-cover img{aspect-ratio:4/3}
  .article-body h2{font-size:20px;margin:32px 0 14px}
  .article-body h3{font-size:18px}
  .related-section{padding-bottom:56px}
  .cta-section{padding-bottom:56px}
  .cta-bar{padding:26px 22px;border-radius:var(--radius-md)}
  .back-entry{padding-bottom:60px}
  .footer-main{grid-template-columns:1fr;gap:26px;padding-bottom:36px}
  .site-footer{padding-top:48px}
}
@media (max-width:520px){
  .nav-inner{height:60px}
  .brand{font-size:15px}
  .article-head h1{font-size:26px;letter-spacing:0}
  .article-meta{font-size:12px;gap:8px}
  .article-body{font-size:16px;line-height:1.82;padding:0}
  .article-body h2{padding-left:14px}
  .rel-card{flex-direction:row;padding:14px}
  .rel-card img{width:82px;height:64px;flex:0 0 82px}
  .btn,.btn-primary,.btn-ghost{width:100%}
  .nav-mobile-extra .btn{width:100%}
  .cta-bar .btn{width:100%}
  .footer-bottom{font-size:12px}
  .breadcrumb .current{max-width:30%}
}

/* roulang page: category3 */
:root{
    --ink-900:#16122B;
    --ink-700:#3A3552;
    --ink-500:#6B6580;
    --line:#E7E3F5;
    --bg:#FAF8FF;
    --surface:#FFFFFF;
    --brand-600:#5A3DF0;
    --brand-500:#7A5CFF;
    --brand-50:#F1ECFF;
    --accent-500:#FF8A3D;
    --accent-50:#FFF3E8;
    --mint-500:#12C2A0;
    --danger:#E5484D;
    --grad:linear-gradient(135deg,#5A3DF0 0%,#8C6BFF 52%,#FF8A3D 100%);
    --sh-1:0 2px 8px rgba(90,61,240,.06);
    --sh-2:0 12px 32px rgba(90,61,240,.10);
    --sh-3:0 20px 48px rgba(90,61,240,.16);
    --r-lg:24px;
    --r-md:20px;
    --r-sm:16px;
    --r-xs:14px;
    --ease:200ms cubic-bezier(.4,0,.2,1);
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
    background:var(--bg);
    color:var(--ink-700);
    font-size:16.5px;
    line-height:1.78;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:var(--brand-600);text-decoration:none;transition:color var(--ease)}
  a:hover{color:var(--brand-500)}
  button,input,select,textarea{font:inherit;color:inherit}
  button{cursor:pointer;border:none;background:none}
  ul,ol{list-style:none}
  h1,h2,h3,h4{color:var(--ink-900);line-height:1.3;font-weight:700}
  :focus-visible{outline:2px solid var(--accent-500);outline-offset:2px}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:80;
    background:var(--surface);
    border-bottom:1px solid var(--line);
    box-shadow:var(--sh-1);
  }
  .header-inner{display:flex;align-items:center;gap:24px;height:72px}
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-mark{
    width:26px;height:26px;border-radius:8px;
    background:var(--grad);
    display:inline-flex;align-items:center;justify-content:center;
    box-shadow:0 4px 10px rgba(90,61,240,.28);
  }
  .brand-mark svg{width:15px;height:15px;fill:#fff}
  .brand-text{font-size:17px;font-weight:700;color:var(--ink-900);letter-spacing:-.2px;white-space:nowrap}
  .brand:hover .brand-text{color:var(--brand-600)}
  .nav-links{display:flex;align-items:center;gap:28px;margin-left:8px}
  .nav-links a{position:relative;font-size:15px;color:var(--ink-700);padding:6px 0;white-space:nowrap}
  .nav-links a::after{
    content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
    background:var(--grad);border-radius:2px;
    transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
  }
  .nav-links a:hover{color:var(--brand-600)}
  .nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
  .nav-links a.active{color:var(--brand-600);font-weight:600}
  .header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
  .search-box{
    display:flex;align-items:center;gap:8px;
    height:40px;width:220px;padding:0 14px;
    background:#fff;border:1px solid var(--line);border-radius:999px;
    transition:border-color var(--ease),box-shadow var(--ease);
  }
  .search-box:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-50)}
  .search-box svg{width:16px;height:16px;stroke:var(--ink-500);fill:none;flex-shrink:0}
  .search-box input{border:none;background:none;outline:none;width:100%;font-size:14px;color:var(--ink-900)}
  .search-box input::placeholder{color:rgba(107,101,128,.6)}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-size:15px;font-weight:600;line-height:1;
    border-radius:999px;padding:0 22px;height:44px;
    transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
    white-space:nowrap;
  }
  .btn-sm{height:40px;padding:0 20px;font-size:14.5px}
  .btn-primary{background:var(--grad);color:#fff;box-shadow:var(--sh-2)}
  .btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3);filter:brightness(1.05)}
  .btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
  .btn-ghost{background:#fff;color:var(--ink-900);border:1px solid var(--line)}
  .btn-ghost:hover{color:var(--brand-600);border-color:var(--brand-500);transform:translateY(-2px)}
  .btn-ghost:active{transform:translateY(0)}
  .link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--brand-600)}
  .link-arrow span{transition:transform var(--ease)}
  .link-arrow:hover span{transform:translateX(4px)}
  .menu-toggle{
    display:none;width:42px;height:42px;border-radius:12px;
    border:1px solid var(--line);background:#fff;
    align-items:center;justify-content:center;
  }
  .menu-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;position:relative}
  .menu-toggle span::before,.menu-toggle span::after{
    content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink-900);border-radius:2px;
  }
  .menu-toggle span::before{top:-6px}
  .menu-toggle span::after{top:6px}

  /* mobile drawer */
  .drawer-mask{
    position:fixed;inset:0;background:rgba(22,18,43,.42);
    opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);z-index:90;
  }
  .drawer-mask.open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:340px;
    background:#fff;z-index:95;padding:22px 20px 28px;
    transform:translateX(102%);transition:transform var(--ease);
    display:flex;flex-direction:column;gap:6px;overflow-y:auto;
    box-shadow:-12px 0 40px rgba(22,18,43,.18);
  }
  .drawer.open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:8px}
  .drawer-head strong{font-size:15px;color:var(--ink-900)}
  .drawer-close{font-size:22px;line-height:1;color:var(--ink-500);padding:4px 8px}
  .drawer a.d-link{display:block;padding:14px 4px;font-size:15.5px;color:var(--ink-900);border-bottom:1px solid var(--line)}
  .drawer a.d-link.active{color:var(--brand-600);font-weight:600}
  .drawer .drawer-search{
    margin-top:16px;display:flex;align-items:center;gap:8px;height:44px;padding:0 14px;
    border:1px solid var(--line);border-radius:var(--r-xs);background:var(--bg);
  }
  .drawer .drawer-search svg{width:16px;height:16px;stroke:var(--ink-500);fill:none}
  .drawer .drawer-search input{border:none;background:none;outline:none;width:100%;font-size:14px}
  .drawer .btn{margin-top:16px;width:100%}

  /* ---------- hero ---------- */
  .page-hero{position:relative;overflow:hidden;padding:44px 0 100px;color:#fff}
  .page-hero-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;background-position:center;
  }
  .page-hero-bg::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(135deg,rgba(90,61,240,.90) 0%,rgba(140,107,255,.78) 52%,rgba(255,138,61,.66) 100%);
  }
  .page-hero-inner{position:relative;z-index:2;max-width:820px}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.78);margin-bottom:20px;flex-wrap:wrap}
  .breadcrumb a{color:rgba(255,255,255,.86)}
  .breadcrumb a:hover{color:#fff;text-decoration:underline}
  .breadcrumb .sep{opacity:.6}
  .page-hero h1{font-size:clamp(30px,4.4vw,48px);font-weight:800;line-height:1.18;letter-spacing:-.5px;color:#fff;margin-bottom:16px}
  .page-hero p{font-size:17px;color:rgba(255,255,255,.9);max-width:640px}
  .tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
  .tag{
    display:inline-flex;align-items:center;
    padding:5px 14px;border-radius:999px;font-size:12.5px;font-weight:600;
    background:var(--brand-50);color:var(--brand-600);
  }
  .tag-light{background:rgba(255,255,255,.18);color:#fff;border:1px solid rgba(255,255,255,.4)}

  /* ---------- overview stats ---------- */
  .overview{position:relative;z-index:3;margin-top:-56px}
  .stat-card{
    display:grid;grid-template-columns:repeat(4,1fr);
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--sh-2);padding:26px 8px;
  }
  .stat{padding:6px 22px;position:relative}
  .stat + .stat::before{content:"";position:absolute;left:0;top:12%;bottom:12%;width:1px;background:var(--line)}
  .stat-num{display:block;font-size:32px;font-weight:800;color:var(--ink-900);font-variant-numeric:tabular-nums;letter-spacing:-.5px}
  .stat-num em{font-style:normal;font-size:15px;font-weight:600;color:var(--brand-600);margin-left:4px}
  .stat-label{display:block;font-size:13px;color:var(--ink-500);margin-top:4px}

  /* ---------- section head ---------- */
  .section{padding:88px 0}
  .section-head{max-width:720px;margin-bottom:34px}
  .section-head h2{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.3px;margin-bottom:12px}
  .section-head p{color:var(--ink-700)}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;font-weight:700;letter-spacing:1px;
    color:var(--brand-600);background:var(--brand-50);
    padding:5px 14px;border-radius:999px;margin-bottom:14px;
  }

  /* ---------- faq layout ---------- */
  .faq-layout{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:28px;align-items:start}
  .faq-main{min-width:0}
  .faq-group-title{
    font-size:20px;font-weight:600;color:var(--ink-900);
    display:flex;align-items:center;gap:10px;margin:34px 0 16px;
  }
  .faq-group-title:first-of-type{margin-top:0}
  .faq-group-title::before{
    content:"";width:4px;height:20px;border-radius:2px;background:var(--grad);
  }
  .faq-group-title .count{
    font-size:12.5px;font-weight:600;color:var(--brand-600);
    background:var(--brand-50);border-radius:999px;padding:2px 10px;margin-left:2px;
  }
  .accordion{display:grid;gap:12px}
  .faq-item{
    position:relative;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-sm);
    box-shadow:var(--sh-1);overflow:hidden;
    transition:border-color var(--ease),box-shadow var(--ease);
  }
  .faq-item:hover{border-color:#D8D0F7;box-shadow:var(--sh-2)}
  .faq-item[open]{border-color:var(--brand-500);box-shadow:var(--sh-2)}
  .faq-item[open]::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--grad);
  }
  .faq-item summary{
    list-style:none;cursor:pointer;position:relative;
    padding:17px 54px 17px 22px;
    font-size:16.5px;font-weight:600;color:var(--ink-900);line-height:1.55;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::after{
    content:"+";position:absolute;right:20px;top:16px;
    width:24px;height:24px;line-height:22px;text-align:center;
    font-size:20px;font-weight:400;color:var(--brand-600);
    border-radius:50%;background:var(--brand-50);
    transition:transform var(--ease),background var(--ease);
  }
  .faq-item[open] summary::after{transform:rotate(45deg);background:var(--accent-50);color:var(--accent-500)}
  .faq-answer{padding:0 22px 18px;font-size:15px;line-height:1.85;color:var(--ink-700)}
  .faq-answer strong{color:var(--ink-900);font-weight:600}

  /* side cards */
  .faq-side{position:sticky;top:96px;display:grid;gap:20px}
  .side-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    box-shadow:var(--sh-1);padding:24px;
  }
  .side-card h3{font-size:17px;font-weight:600;margin-bottom:10px}
  .side-card p{font-size:14px;color:var(--ink-500);line-height:1.8}
  .side-list{margin-top:14px;display:grid;gap:10px}
  .side-list li{
    display:flex;gap:10px;align-items:flex-start;
    font-size:14px;color:var(--ink-700);line-height:1.7;
  }
  .dot{
    flex-shrink:0;width:18px;height:18px;border-radius:50%;
    background:var(--mint-500);color:#fff;font-size:11px;font-weight:700;
    display:inline-flex;align-items:center;justify-content:center;margin-top:3px;
  }
  .side-links{display:grid;gap:2px;margin-top:8px}
  .side-links a{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding:11px 0;font-size:14.5px;color:var(--ink-900);
    border-bottom:1px solid var(--line);
  }
  .side-links a:last-child{border-bottom:none}
  .side-links a:hover{color:var(--brand-600)}
  .side-links a::after{content:"›";color:var(--brand-500);font-size:17px;line-height:1}
  .side-card .btn{margin-top:16px;width:100%}

  /* ---------- closing ---------- */
  .closing{padding:24px 0 96px}
  .closing-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch}
  .closing-copy{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--sh-2);padding:38px 36px;
    display:flex;flex-direction:column;justify-content:center;
    position:relative;overflow:hidden;
  }
  .closing-copy::before{
    content:"";position:absolute;right:-60px;top:-60px;width:200px;height:200px;border-radius:50%;
    background:radial-gradient(circle,rgba(122,92,255,.18),rgba(122,92,255,0) 70%);
  }
  .closing-copy h2{font-size:clamp(23px,2.5vw,30px);margin-bottom:14px;letter-spacing:-.3px}
  .closing-copy p{color:var(--ink-700);margin-bottom:18px}
  .closing-copy .side-list{margin-bottom:22px}
  .closing-form{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--sh-2);padding:34px 32px;
  }
  .closing-form h3{font-size:19px;margin-bottom:6px}
  .closing-form > p{font-size:13.5px;color:var(--ink-500);margin-bottom:20px}
  .field{margin-bottom:16px}
  .field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink-900);margin-bottom:7px}
  .field label .req{color:var(--accent-500);margin-left:3px}
  .field input{
    width:100%;height:46px;padding:0 14px;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-xs);
    font-size:14.5px;color:var(--ink-900);outline:none;
    transition:border-color var(--ease),box-shadow var(--ease);
  }
  .field input::placeholder{color:rgba(107,101,128,.6)}
  .field input:hover{border-color:#D8D0F7}
  .field input:focus{border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-50)}
  .closing-form .btn{width:100%;margin-top:6px}
  .form-note{font-size:12px;color:var(--ink-500);margin-top:12px;line-height:1.7}
  .cover-figure{
    margin-top:26px;border-radius:var(--r-sm);overflow:hidden;
    border:1px solid var(--line);background:var(--brand-50);
  }
  .cover-figure img{width:100%;height:170px;object-fit:cover;border-radius:var(--r-sm)}

  /* ---------- footer ---------- */
  .site-footer{background:#1B1730;color:rgba(255,255,255,.72);position:relative;padding-top:2px}
  .site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad)}
  .footer-main{
    display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;
    padding:64px 0 44px;
  }
  .footer-brand{display:inline-flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:#fff;margin-bottom:14px}
  .footer-brand:hover{color:#fff}
  .footer-brand .brand-mark{width:24px;height:24px;border-radius:7px}
  .footer-desc{font-size:14px;color:rgba(255,255,255,.62);line-height:1.8;max-width:340px}
  .footer-contact{font-size:13.5px;color:rgba(255,255,255,.5);line-height:1.9;margin-top:14px}
  .footer-col h4{font-size:14px;color:#fff;margin-bottom:14px;font-weight:600}
  .footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.62);padding:6px 0;transition:color var(--ease)}
  .footer-col a:hover{color:var(--mint-500);text-decoration:underline}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);
    padding:20px 0 26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    font-size:13px;color:rgba(255,255,255,.55);
  }
  .footer-bottom .note{max-width:520px}

  /* ---------- responsive ---------- */
  @media (max-width:1180px){
    .header-inner{gap:18px}
    .nav-links{gap:20px}
    .search-box{width:180px}
  }
  @media (max-width:1024px){
    .container{padding:0 24px}
    .nav-links,.search-box{display:none}
    .menu-toggle{display:flex}
    .header-actions{gap:10px}
    .section{padding:72px 0}
    .faq-layout{grid-template-columns:1fr;gap:24px}
    .faq-side{position:static;grid-template-columns:1fr 1fr}
    .closing-grid{grid-template-columns:1fr}
    .footer-main{grid-template-columns:1fr 1fr;gap:30px;padding:52px 0 36px}
    .page-hero{padding:36px 0 92px}
  }
  @media (max-width:768px){
    body{font-size:16px}
    .header-inner{height:64px}
    .brand-text{font-size:15.5px}
    .stat-card{grid-template-columns:1fr 1fr;padding:14px 6px}
    .stat{padding:14px 18px}
    .stat + .stat::before{display:none}
    .stat:nth-child(n+3){border-top:1px solid var(--line)}
    .stat:nth-child(even){border-left:1px solid var(--line)}
    .stat-num{font-size:27px}
    .page-hero h1{font-size:28px}
    .page-hero p{font-size:15.5px}
    .overview{margin-top:-44px}
    .faq-side{grid-template-columns:1fr}
    .closing-copy,.closing-form{padding:26px 22px}
    .closing{padding-bottom:72px}
    .footer-main{grid-template-columns:1fr 1fr;gap:26px;padding:44px 0 30px}
    .footer-brand{margin-bottom:10px}
  }
  @media (max-width:520px){
    .container{padding:0 18px}
    .header-inner{height:60px}
    .brand-text{font-size:14.5px;white-space:normal;line-height:1.25}
    .brand-mark{width:24px;height:24px}
    .btn{width:100%}
    .btn-sm{width:auto}
    .faq-item summary{font-size:15.5px;padding:15px 48px 15px 18px}
    .faq-item summary::after{right:16px;top:14px}
    .faq-answer{padding:0 18px 16px;font-size:14.5px}
    .tag-row{gap:8px}
    .footer-main{grid-template-columns:1fr;gap:24px}
    .footer-bottom{flex-direction:column;gap:8px}
    .stat-card{padding:10px 2px}
    .stat{padding:12px 14px}
    .stat-num{font-size:24px}
    .section{padding:56px 0}
  }

/* roulang page: category2 */
:root{
  --ink-900:#16122B;
  --ink-700:#3A3552;
  --ink-500:#6B6580;
  --line:#E7E3F5;
  --bg:#FAF8FF;
  --surface:#FFFFFF;
  --brand-600:#5A3DF0;
  --brand-500:#7A5CFF;
  --brand-50:#F1ECFF;
  --accent-500:#FF8A3D;
  --accent-50:#FFF3E8;
  --mint-500:#12C2A0;
  --danger:#E5484D;
  --radius-lg:24px;
  --radius-md:20px;
  --radius-sm:14px;
  --sh-1:0 2px 8px rgba(90,61,240,.06);
  --sh-2:0 12px 32px rgba(90,61,240,.10);
  --sh-3:0 20px 48px rgba(90,61,240,.16);
  --grad:linear-gradient(135deg,#5A3DF0 0%,#8C6BFF 52%,#FF8A3D 100%);
  --t:200ms cubic-bezier(.4,0,.2,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.78;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
h1,h2,h3,h4,p,figure,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block}
a{color:var(--brand-600);text-decoration:none;transition:color var(--t),border-color var(--t),background var(--t)}
a:hover{color:var(--brand-500)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent-500);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section-alt{background:var(--brand-50)}
.section-head{max-width:720px;margin-bottom:40px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:999px;
  background:var(--brand-50);color:var(--brand-600);
  font-size:12.5px;font-weight:600;letter-spacing:.2px;
}
.eyebrow.is-accent{background:var(--accent-50);color:#C25A12}
h2.section-title{
  font-size:clamp(24px,3vw,34px);line-height:1.3;font-weight:700;color:var(--ink-900);
  margin:16px 0 12px;letter-spacing:-.3px;
}
.section-desc{font-size:16px;color:var(--ink-500);line-height:1.8}
/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--surface);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t);
}
.site-header.scrolled{box-shadow:var(--sh-1)}
.header-inner{display:flex;align-items:center;gap:32px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;max-width:58vw;overflow:hidden}
.brand-mark{
  width:24px;height:24px;border-radius:8px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;flex:0 0 auto;
  box-shadow:0 4px 12px rgba(90,61,240,.28);
}
.brand-mark svg{width:14px;height:14px;fill:#fff}
.brand-text{font-size:17px;font-weight:700;color:var(--ink-900);white-space:nowrap;letter-spacing:-.2px}
.nav-links{display:flex;align-items:center;gap:28px;margin:0 auto}
.nav-links a{
  position:relative;padding:6px 0;font-size:15px;font-weight:500;color:var(--ink-700);
  transition:color var(--t);
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-links a:hover{color:var(--brand-600)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--brand-600);font-weight:700}
.nav-links a.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:14px}
.search-box{
  display:flex;align-items:center;gap:8px;height:40px;width:220px;padding:0 14px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  transition:border-color var(--t),box-shadow var(--t);
}
.search-box:focus-within{border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-50)}
.search-box svg{width:15px;height:15px;stroke:var(--ink-500);fill:none;stroke-width:2;flex:0 0 auto}
.search-box input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--ink-900)}
.search-box input::placeholder{color:rgba(107,101,128,.6)}
/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 22px;border-radius:999px;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:transform var(--t),box-shadow var(--t),background var(--t),border-color var(--t),color var(--t),filter var(--t);
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3);filter:brightness(1.05)}
.btn-primary:active{transform:translateY(0);box-shadow:inset 0 2px 6px rgba(22,18,43,.24)}
.btn-primary[disabled]{filter:saturate(.45);box-shadow:none;transform:none;cursor:not-allowed}
.btn-ghost{background:var(--surface);border:1px solid var(--line);color:var(--ink-900)}
.btn-ghost:hover{border-color:var(--brand-500);color:var(--brand-600);transform:translateY(-2px);box-shadow:var(--sh-1)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{height:38px;padding:0 18px;font-size:14px}
.btn-lg{height:48px;padding:0 28px;font-size:16px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand-600);font-size:15px}
.link-arrow span{transition:transform var(--t)}
.link-arrow:hover span{transform:translateX(4px)}
.menu-toggle{
  display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  align-items:center;justify-content:center;background:var(--surface);
}
.menu-toggle svg{width:18px;height:18px;stroke:var(--ink-900);stroke-width:2;fill:none;stroke-linecap:round}
/* ---------- Page hero ---------- */
.page-hero{
  position:relative;color:#fff;overflow:hidden;
  background:#2B2350 url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding:80px 0 68px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(90,61,240,.9) 0%,rgba(122,92,255,.82) 48%,rgba(255,138,61,.62) 100%);
}
.page-hero-inner{position:relative;z-index:1;max-width:880px}
.breadcrumb{font-size:13px;color:rgba(255,255,255,.82);display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:20px}
.breadcrumb a{color:rgba(255,255,255,.82)}
.breadcrumb a:hover{color:#fff;text-decoration:underline}
.breadcrumb .sep{opacity:.6}
.breadcrumb .current{color:#fff;font-weight:600}
.page-hero h1{
  font-size:clamp(28px,4vw,46px);line-height:1.2;font-weight:800;
  letter-spacing:-.5px;color:#fff;margin:0 0 16px;
}
.page-hero .hero-sub{font-size:17px;line-height:1.8;color:rgba(255,255,255,.92);max-width:620px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-tags .tag{
  display:inline-flex;align-items:center;
  padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;
  color:#fff;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.34);
}
/* ---------- Doc layout ---------- */
.doc-layout{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:40px;align-items:start}
.doc-aside{position:sticky;top:96px}
.doc-toc{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:22px 18px;box-shadow:var(--sh-1);
}
.toc-title{font-size:13px;font-weight:700;color:var(--ink-500);letter-spacing:.4px;padding:0 0 0 14px;margin-bottom:12px}
.doc-toc a{
  display:block;padding:10px 12px;border-left:2px solid var(--line);
  font-size:14px;color:var(--ink-700);border-radius:0 10px 10px 0;
  transition:all var(--t);
}
.doc-toc a:hover,.doc-toc a:focus-visible{
  color:var(--brand-600);border-left-color:var(--brand-500);background:var(--brand-50);
}
.doc-side-card{
  margin-top:20px;padding:22px;border-radius:var(--radius-md);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-1);
}
.doc-side-card h3{font-size:15px;color:var(--ink-900);margin-bottom:8px;font-weight:700}
.doc-side-card p{font-size:13.5px;color:var(--ink-500);line-height:1.75;margin-bottom:14px}
.doc-block{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:32px;box-shadow:var(--sh-1);margin-bottom:28px;
  scroll-margin-top:96px;
}
.doc-block h2{
  position:relative;padding-left:16px;
  font-size:clamp(21px,2.3vw,26px);line-height:1.35;font-weight:700;color:var(--ink-900);
  margin-bottom:18px;letter-spacing:-.2px;
}
.doc-block h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;border-radius:2px;background:var(--grad);
}
.doc-block p{font-size:16px;line-height:1.88;color:var(--ink-700);margin-bottom:16px}
.doc-block p:last-of-type{margin-bottom:0}
.doc-figure{margin:24px 0 22px;border-radius:16px;overflow:hidden;background:var(--brand-50)}
.doc-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:16px}
.doc-figure figcaption{font-size:13px;color:var(--ink-500);padding:10px 2px 0}
.mini-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
.mini-card{
  background:var(--bg);border:1px solid var(--line);border-radius:16px;padding:20px;
  transition:transform var(--t),box-shadow var(--t),background var(--t),border-color var(--t);
}
.mini-card:hover{
  background:var(--surface);border-color:#DCD5FA;box-shadow:var(--sh-2);transform:translateY(-3px);
}
.mini-card h3{font-size:16px;font-weight:700;color:var(--ink-900);margin-bottom:6px}
.mini-card p{font-size:14px;line-height:1.72;color:var(--ink-500);margin:0}
/* ---------- Version table ---------- */
.table-wrap{
  overflow-x:auto;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--sh-1);
}
table{width:100%;border-collapse:collapse;min-width:660px}
th{
  background:var(--brand-50);text-align:left;font-size:13.5px;font-weight:700;
  color:var(--ink-900);padding:15px 20px;letter-spacing:.2px;
}
td{
  padding:15px 20px;border-top:1px solid var(--line);
  font-size:14.5px;color:var(--ink-700);line-height:1.7;
}
td:first-child{font-weight:600;color:var(--ink-900);white-space:nowrap}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}
.stat{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
  padding:24px;box-shadow:var(--sh-1);
}
.stat-icon{
  width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:var(--accent-50);color:var(--accent-500);margin-bottom:14px;
}
.stat-icon svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.stat:nth-child(2) .stat-icon{background:var(--brand-50);color:var(--brand-600)}
.stat:nth-child(3) .stat-icon{background:#E6FBF5;color:var(--mint-500)}
.stat-num{font-size:31px;font-weight:800;color:var(--ink-900);line-height:1.2;letter-spacing:-.5px}
.stat-label{font-size:13px;color:var(--ink-500);margin-top:6px}
/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:48px;align-items:start}
.faq-item{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:16px;margin-bottom:14px;overflow:hidden;transition:border-color var(--t),box-shadow var(--t);
}
.faq-item:hover{border-color:#D6CDF8;box-shadow:var(--sh-1)}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:18px 52px 18px 20px;font-size:16.5px;font-weight:600;color:var(--ink-900);line-height:1.5;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  font-size:22px;line-height:1;color:var(--brand-600);font-weight:400;
  transition:transform var(--t);
}
.faq-item[open]{border-color:var(--brand-500);box-shadow:var(--sh-1)}
.faq-item[open]::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:2px;background:var(--grad);
}
.faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.faq-answer{padding:0 22px 20px;font-size:15px;line-height:1.86;color:var(--ink-700)}
/* ---------- CTA ---------- */
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.cta-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:34px;box-shadow:var(--sh-2);
}
.cta-card h2{font-size:clamp(22px,2.4vw,28px);line-height:1.35;color:var(--ink-900);font-weight:700;margin:14px 0 12px}
.cta-card p{font-size:15.5px;line-height:1.8;color:var(--ink-500);margin-bottom:22px}
.cta-points{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 13px;border-radius:999px;background:var(--brand-50);
  color:var(--brand-600);font-size:12.5px;font-weight:600;
}
.chip.is-mint{background:#E6FBF5;color:#0C9179}
.form-card{background:var(--bg)}
.field{margin-bottom:14px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink-900);margin-bottom:7px}
.field label .req{color:var(--accent-500);margin-left:2px}
.field input,.field select,.field textarea{
  width:100%;height:46px;padding:0 14px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:var(--surface);font-size:15px;color:var(--ink-900);
  transition:border-color var(--t),box-shadow var(--t);
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand-500);box-shadow:0 0 0 3px var(--brand-50);
}
.field input::placeholder,.field textarea::placeholder{color:rgba(107,101,128,.6)}
.form-hint{font-size:12px;color:var(--ink-500);line-height:1.7;margin-top:12px}
.form-card .btn{width:100%;margin-top:6px}
/* ---------- Footer ---------- */
.site-footer{position:relative;background:#1B1730;padding:64px 0 0;margin-top:96px}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);
}
.footer-main{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700}
.footer-brand:hover{color:#fff}
.footer-brand .brand-mark{box-shadow:none}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);margin:16px 0 12px;max-width:330px}
.footer-contact{font-size:13.5px;line-height:1.9;color:rgba(255,255,255,.55)}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.65);margin-bottom:10px}
.footer-col a:hover{color:var(--mint-500);text-decoration:underline}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0;
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}
/* ---------- Drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(22,18,43,.45);z-index:150;
  opacity:0;pointer-events:none;transition:opacity var(--t);
}
.drawer-mask.show{opacity:1;pointer-events:auto}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;z-index:200;
  background:var(--surface);transform:translateX(100%);transition:transform 240ms cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;padding:20px;overflow-y:auto;
  box-shadow:-20px 0 60px rgba(22,18,43,.2);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.drawer-head .brand-text{font-size:15px}
.drawer-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
}
.drawer-close svg{width:16px;height:16px;stroke:var(--ink-900);stroke-width:2;fill:none;stroke-linecap:round}
.drawer-nav{display:flex;flex-direction:column;margin:8px 0 16px}
.drawer-nav a{
  display:flex;align-items:center;min-height:52px;font-size:15.5px;font-weight:500;
  color:var(--ink-700);border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--brand-600);font-weight:700}
.drawer .search-box{width:100%;margin-bottom:12px}
.drawer .btn{width:100%}
/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .container{padding:0 28px}
}
@media (max-width:1024px){
  .header-inner{gap:20px}
  .nav-links{gap:20px}
  .search-box{width:180px}
  .doc-layout{grid-template-columns:1fr;gap:28px}
  .doc-aside{position:static}
  .doc-toc{display:flex;gap:10px;overflow-x:auto;padding:14px;box-shadow:var(--sh-1)}
  .toc-title{display:none}
  .doc-toc a{
    white-space:nowrap;border:1px solid var(--line);border-left:1px solid var(--line);
    border-radius:999px;padding:8px 15px;font-size:13px;
  }
  .doc-toc a:hover,.doc-toc a:focus-visible{border-color:var(--brand-500)}
  .doc-side-card{display:none}
  .faq-layout{grid-template-columns:1fr;gap:28px}
  .footer-main{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .search-box{display:none}
  .menu-toggle{display:inline-flex}
  .header-actions{margin-left:auto}
  .site-header.scrolled{box-shadow:var(--sh-1)}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .header-inner{height:64px}
  .brand-text{font-size:15px}
  .page-hero{padding:56px 0 48px}
  .page-hero .hero-sub{font-size:15.5px}
  .doc-block{padding:24px}
  .doc-block p{font-size:15.5px}
  .mini-grid{grid-template-columns:1fr}
  .stat-row{grid-template-columns:1fr 1fr;gap:16px}
  .cta-grid{grid-template-columns:1fr}
  .cta-card{padding:26px}
  .footer-main{grid-template-columns:1fr 1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .site-footer{margin-top:56px;padding-top:48px}
}
@media (max-width:520px){
  .brand-text{font-size:14px}
  .brand{max-width:64vw}
  .btn{width:100%}
  .btn-sm,.header-actions .btn{width:auto}
  .page-hero h1{font-size:26px}
  .stat-row{grid-template-columns:1fr}
  .footer-main{grid-template-columns:1fr}
  .doc-block{padding:20px}
  .faq-item summary{font-size:15.5px;padding:16px 46px 16px 18px}
  .faq-answer{padding:0 18px 18px;font-size:14.5px}
  .doc-toc a{font-size:12.5px;padding:7px 13px}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;scroll-behavior:auto !important}
}