:root{
  --primary:#6F5AE8;
  --primary-soft:#9A8CF2;
  --ink:#242433;
  --text:#30303A;
  --muted:#70707D;
  --bg:#F8F8FC;
  --surface:#FFFFFF;
  --surface-soft:#F0EEFA;
  --accent:#F29A4A;
  --border:#DDD9F2;
  --shadow:0 16px 44px rgba(36,36,51,.08);
  --radius:22px;
  --radius-sm:14px;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.75;text-rendering:optimizeLegibility}
img{display:block;max-width:100%;height:auto}
a{color:var(--primary);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:#5641d3}
button,input{font:inherit}
button{cursor:pointer}
.wrap{width:min(var(--max),calc(100% - 40px));margin-inline:auto}
.skip-link{position:fixed;left:12px;top:-80px;z-index:9999;background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(248,248,252,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(221,217,242,.8)}
.header-inner{min-height:76px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;min-width:max-content}.brand img{width:44px;height:44px;object-fit:contain}.brand span{display:grid}.brand strong{font-size:17px;line-height:1.2}.brand small{font-size:12px;color:var(--muted);margin-top:3px}
.primary-nav{display:flex;align-items:center;gap:4px;margin-left:auto}.primary-nav a{color:var(--text);text-decoration:none;padding:9px 11px;border-radius:10px;font-size:15px}.primary-nav a:hover,.primary-nav a.is-active{background:var(--surface-soft);color:var(--primary)}
.search-open,.nav-toggle{border:1px solid var(--border);background:var(--surface);color:var(--ink);border-radius:11px;padding:9px 13px}.nav-toggle{display:none}
.hero{padding:64px 0 42px}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:54px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;margin:0 0 14px;color:var(--primary);font-size:14px;font-weight:700;letter-spacing:.03em}.eyebrow:before{content:"";width:28px;height:2px;background:var(--primary)}
.hero h1,.page-hero h1{margin:0;color:var(--ink);font-size:clamp(38px,5vw,64px);line-height:1.12;letter-spacing:-.035em}.hero .lead,.page-hero .lead{font-size:18px;color:var(--muted);max-width:720px;margin:20px 0 0}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 18px;border-radius:12px;text-decoration:none;font-weight:700;border:1px solid transparent}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:#5c48d9;color:#fff}.btn-accent{background:var(--accent);color:#2e2011}.btn-accent:hover{background:#e88b37;color:#2e2011}.btn-secondary{background:var(--surface);color:var(--ink);border-color:var(--border)}
.hero-visual{position:relative}.hero-visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:32px;box-shadow:var(--shadow)}.visual-note{position:absolute;left:-18px;bottom:24px;background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);padding:14px 16px;border-radius:15px;max-width:240px}.visual-note strong{display:block;color:var(--ink);margin-bottom:3px}.visual-note span{font-size:13px;color:var(--muted)}
.page-hero{padding:46px 0 24px}.page-hero h1{font-size:clamp(34px,4.5vw,54px)}.page-hero .hero-mini{display:grid;grid-template-columns:1fr 320px;gap:32px;align-items:center;margin-top:20px}.page-hero img{border-radius:20px;aspect-ratio:16/10;object-fit:cover}
.breadcrumb{padding-top:24px}.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0;color:var(--muted);font-size:14px}.breadcrumb li:not(:last-child)::after{content:"/";margin-left:8px;color:#aaa}.breadcrumb a{color:var(--muted)}
.section{padding:56px 0}.section-tight{padding:34px 0}.section-soft{background:var(--surface-soft)}.section-dark{background:var(--ink);color:#ecebf5}.section-dark h2,.section-dark h3{color:#fff}.section-dark a{color:#d8d2ff}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:26px}.section-head h2{margin:0;color:var(--ink);font-size:clamp(28px,3.4vw,42px);line-height:1.2;letter-spacing:-.025em}.section-head p{margin:0;color:var(--muted);max-width:590px}.section-dark .section-head p{color:#bebdca}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:0 8px 28px rgba(36,36,51,.035)}.card h2,.card h3{margin:0 0 10px;color:var(--ink);line-height:1.3}.card p{margin:0;color:var(--muted)}.card .text-link{display:inline-flex;margin-top:16px;font-weight:700}.media-card{overflow:hidden;padding:0}.media-card img{width:100%;aspect-ratio:16/10;object-fit:cover}.media-card .card-body{padding:22px}
.feature-strip{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:stretch}.feature-main{position:relative;min-height:430px;overflow:hidden;border-radius:28px}.feature-main img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}.feature-main:after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(20,18,34,.78),rgba(20,18,34,.04) 70%)}.feature-copy{position:absolute;z-index:2;left:30px;right:30px;bottom:28px;color:#fff}.feature-copy h2{font-size:34px;margin:0 0 8px}.feature-copy p{max-width:680px;margin:0 0 16px;color:#e9e7f5}.feature-copy a{color:#fff;font-weight:700}
.editor-list{display:grid;gap:14px}.editor-item{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:18px 20px}.editor-item small{color:var(--primary);font-weight:700}.editor-item h3{font-size:18px;margin:4px 0 8px}.editor-item p{font-size:14px;color:var(--muted);margin:0}.editor-item a{display:inline-block;margin-top:10px;font-weight:700}
.topic-index{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.topic-row{display:flex;gap:16px;align-items:flex-start;padding:18px;border-radius:16px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1)}.topic-row b{display:grid;place-items:center;flex:0 0 38px;height:38px;border-radius:50%;background:var(--primary);color:#fff}.topic-row h3{margin:0 0 4px;font-size:17px}.topic-row p{margin:0;color:#c6c5d0;font-size:14px}
.checklist{display:grid;gap:12px;list-style:none;padding:0;margin:0}.checklist li{position:relative;padding:14px 16px 14px 46px;background:var(--surface);border:1px solid var(--border);border-radius:14px}.checklist li:before{content:"✓";position:absolute;left:16px;top:14px;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:var(--surface-soft);color:var(--primary);font-weight:800}
.notice{border-left:4px solid var(--accent);background:#fff7ef;padding:18px 20px;border-radius:0 14px 14px 0;color:#5a4432}.notice strong{color:#3f2d1f}.notice p:last-child{margin-bottom:0}
.article-list{display:grid;gap:18px}.article-card{display:grid;grid-template-columns:220px 1fr;gap:22px;padding:18px;background:var(--surface);border:1px solid var(--border);border-radius:20px}.article-card img{width:100%;height:100%;min-height:150px;object-fit:cover;border-radius:14px}.article-card h2,.article-card h3{margin:2px 0 8px;line-height:1.35}.article-card p{margin:0;color:var(--muted)}.meta{display:flex;flex-wrap:wrap;gap:8px 14px;color:var(--muted);font-size:13px}.tag{display:inline-flex;padding:4px 9px;border-radius:999px;background:var(--surface-soft);color:var(--primary);font-size:12px;font-weight:700}
.article-shell{display:grid;grid-template-columns:minmax(0,780px) minmax(240px,1fr);gap:44px;align-items:start}.article-body{background:var(--surface);border:1px solid var(--border);border-radius:26px;padding:34px}.article-body .article-image{width:100%;border-radius:18px;aspect-ratio:16/9;object-fit:cover;margin:18px 0 28px}.article-body h1{font-size:clamp(32px,4vw,48px);line-height:1.2;margin:0;color:var(--ink)}.article-body h2{margin-top:34px;color:var(--ink)}.article-body p{font-size:17px;margin:0 0 20px}.article-aside{position:sticky;top:100px}.aside-box{background:var(--surface-soft);border-radius:18px;padding:20px;margin-bottom:18px}.aside-box h2{font-size:18px;margin:0 0 12px}.aside-box ul{margin:0;padding-left:18px}.aside-box li+li{margin-top:8px}
.faq-list{display:grid;gap:12px}.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:16px;overflow:hidden}.faq-question{width:100%;border:0;background:transparent;text-align:left;padding:18px 48px 18px 20px;position:relative;color:var(--ink);font-weight:700}.faq-question:after{content:"+";position:absolute;right:20px;top:15px;font-size:24px;color:var(--primary)}.faq-question[aria-expanded="true"]:after{content:"−"}.faq-answer{padding:0 20px 18px;color:var(--muted)}.faq-answer p{margin:0}
.search-form label{display:block;font-weight:700;margin-bottom:8px}.search-row{display:flex;gap:10px}.search-row input{min-width:0;flex:1;border:1px solid var(--border);border-radius:12px;padding:12px 14px;background:#fff;color:var(--ink)}.search-row button{border:0;background:var(--primary);color:#fff;border-radius:12px;padding:11px 18px;font-weight:700}.search-modal[hidden]{display:none!important}.search-modal{position:fixed;inset:0;z-index:100}.search-backdrop{position:absolute;inset:0;background:rgba(26,24,38,.58)}.search-panel{position:relative;width:min(620px,calc(100% - 32px));margin:12vh auto 0;background:var(--surface);border-radius:22px;padding:28px;box-shadow:var(--shadow)}.search-panel h2{margin-top:0}.search-panel p{color:var(--muted)}.search-close{position:absolute;right:14px;top:12px;border:0;background:transparent;font-size:30px;color:var(--muted)}.modal-open{overflow:hidden}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:32px}.prose{max-width:820px}.prose h2{margin-top:34px;color:var(--ink);font-size:28px}.prose h3{margin-top:26px;color:var(--ink)}.prose p,.prose li{font-size:16.5px}.prose p{margin:0 0 18px}.prose ul,.prose ol{padding-left:22px}
.stateless-table{width:100%;border-collapse:collapse;background:var(--surface);border-radius:16px;overflow:hidden;border:1px solid var(--border)}.stateless-table th,.stateless-table td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--border);vertical-align:top}.stateless-table th{background:var(--surface-soft);color:var(--ink)}.stateless-table tr:last-child td{border-bottom:0}
.site-footer{margin-top:54px;background:var(--ink);color:#d8d7e0;padding:52px 0 18px}.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:34px}.site-footer h2{color:#fff;font-size:17px;margin:0 0 12px}.site-footer p{color:#bbb9c8;margin:0}.site-footer ul{list-style:none;padding:0;margin:0}.site-footer li+li{margin-top:7px}.site-footer a{color:#d8d2ff}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;font-size:13px}.footer-bottom p{margin:0}
.empty-state{padding:34px;background:var(--surface);border:1px dashed var(--border);border-radius:18px;text-align:center}.empty-state h2{margin-top:0}.number-list{counter-reset:step;display:grid;gap:14px}.number-list article{counter-increment:step;position:relative;padding:20px 20px 20px 64px;background:var(--surface);border:1px solid var(--border);border-radius:16px}.number-list article:before{content:counter(step);position:absolute;left:18px;top:18px;width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--primary);color:#fff;font-weight:800}.number-list h3{margin:0 0 6px}.number-list p{margin:0;color:var(--muted)}
@media (max-width:1024px){.primary-nav{position:absolute;left:20px;right:20px;top:72px;display:none;flex-direction:column;align-items:stretch;background:var(--surface);padding:12px;border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow)}.primary-nav.is-open{display:flex}.nav-toggle{display:inline-flex;margin-left:auto}.search-open{margin-left:0}.hero-grid{grid-template-columns:1fr;gap:34px}.hero-visual{max-width:760px}.feature-strip{grid-template-columns:1fr}.article-shell{grid-template-columns:1fr}.article-aside{position:static}.footer-grid{grid-template-columns:1fr 1fr}.page-hero .hero-mini{grid-template-columns:1fr}}
@media (max-width:768px){.wrap{width:min(var(--max),calc(100% - 28px))}.header-inner{min-height:68px;gap:10px}.brand small{display:none}.brand strong{font-size:15px}.brand img{width:38px;height:38px}.search-open{padding:8px 10px;font-size:14px}.hero{padding:42px 0 28px}.hero h1,.page-hero h1{font-size:36px}.hero .lead,.page-hero .lead{font-size:16px}.visual-note{position:static;margin-top:12px}.section{padding:42px 0}.section-head{display:block}.section-head p{margin-top:8px}.grid-3,.grid-2,.topic-index,.two-col{grid-template-columns:1fr}.article-card{grid-template-columns:1fr}.article-card img{max-height:260px}.footer-grid{grid-template-columns:1fr}.footer-bottom{display:block}.footer-bottom a{display:inline-block;margin-top:10px}.article-body{padding:24px}.feature-main{min-height:380px}.feature-copy{left:20px;right:20px;bottom:20px}.feature-copy h2{font-size:28px}}
@media (max-width:600px){.brand span{display:none}.nav-toggle{margin-left:auto}.hero-actions{display:grid}.btn{width:100%}.search-row{display:grid}.page-hero{padding-top:32px}.card{padding:20px}.article-body h1{font-size:31px}.stateless-table{display:block;overflow-x:auto}.feature-main{min-height:340px}}
@media (max-width:375px){.wrap{width:calc(100% - 22px)}.header-inner{gap:7px}.search-open,.nav-toggle{font-size:12px;padding:8px 9px}.hero h1,.page-hero h1{font-size:31px}.section-head h2{font-size:27px}.article-body{padding:19px}.article-body p{font-size:16px}}