:root{
  --bg:#f6f8fb;--panel:#ffffff;--ink:#172033;--muted:#667085;--line:#dce3ee;--brand:#2357a5;--accent:#f39b3d;--soft:#eaf2ff;--green:#1d8f75;--shadow:0 18px 48px rgba(23,32,51,.08);--radius:22px
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input{font:inherit}.site-header{background:linear-gradient(180deg,#fff,#f7fbff);border-bottom:1px solid var(--line);position:relative;z-index:2}.top-strip{text-align:center;padding:8px 14px;font-size:14px;color:#28435f;background:#eef6ff}.header-inner{max-width:1180px;margin:auto;padding:20px 18px;display:flex;gap:20px;align-items:center;justify-content:space-between}.brand-logo{display:flex;gap:12px;align-items:center}.brand-logo img{width:64px;height:64px;border-radius:18px;box-shadow:var(--shadow);object-fit:cover}.brand-logo strong{display:block;font-size:28px;letter-spacing:.5px}.brand-logo 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var(--line);background:#fff;color:#23435e}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:22px}.stat{background:var(--soft);border-radius:18px;padding:14px}.stat strong{display:block;font-size:22px;color:var(--brand)}.hero-side{display:grid;gap:14px}.panel{padding:20px}.panel h2,.section-title h2{margin:0 0 8px;font-size:26px}.meta-line,.source-line{color:var(--muted);font-size:13px;margin:.2rem 0}.section-title{display:flex;align-items:end;justify-content:space-between;gap:18px;margin:38px 0 16px}.section-title p{margin:0;color:var(--muted)}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.module-card{padding:22px;display:flex;flex-direction:column;gap:13px}.module-card h3{margin:0;font-size:22px}.module-card p{margin:0;color:#3f5368}.module-card ul{margin:0;padding-left:20px;color:#3f5368}.module-foot{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-top:auto}.heat{color:#b45d00;background:#fff3e2;padding:7px 10px;border-radius:999px;font-weight:700;font-size:13px}.more-link{background:#eff5ff;color:var(--brand);border:1px solid #cfe0f7}.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.video-card{overflow:hidden}.video-media{position:relative;display:block;aspect-ratio:16/9;background:#dfe8f4;overflow:hidden}.video-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}.video-card:hover .video-media img{transform:scale(1.05)}.play-button{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.92);width:72px;height:72px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:rgba(35,87,165,.92);color:#fff;opacity:.05;transition:.25s ease;font-weight:800}.video-card:hover .play-button{opacity:1;transform:translate(-50%,-50%) scale(1)}.video-mark{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.92);color:var(--brand);font-weight:800;border-radius:999px;padding:5px 10px}.video-body{padding:18px}.video-body h3{margin:5px 0 8px;font-size:20px;line-height:1.4}.video-body p{color:#45586d;margin:0 0 10px}.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}.tag-list span{background:#eef6ff;color:#254d85;border-radius:999px;padding:4px 9px;font-size:13px}.metrics{display:flex;gap:8px;flex-wrap:wrap;color:#54657a;font-size:13px;border-top:1px dashed var(--line);padding-top:12px}.card-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.card-actions button,.card-actions a{font-size:13px;padding:7px 10px;background:#f2f6fb;color:#23435e;border:1px solid var(--line)}.image-description{font-size:12px;color:var(--muted);margin-top:12px}.author-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.author-card{padding:18px}.author-card img{height:120px;width:100%;object-fit:cover;border-radius:18px;margin-bottom:12px}.author-card h3{margin:0 0 4px}.author-card p{color:#53677d;margin:0 0 10px}.mini-stats{display:flex;gap:8px;flex-wrap:wrap}.mini-stats span{background:#f7f9fc;border:1px solid var(--line);border-radius:999px;padding:4px 8px;font-size:13px}.comment-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.comment-card{padding:18px}.comment-card strong{display:block}.faq-list{display:grid;gap:12px}.faq-item{padding:18px}.faq-item summary{cursor:pointer;font-weight:800}.faq-item p{margin:10px 0 0;color:#40546a}.page-hero{padding:28px;margin-bottom:24px}.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px}.aside-stack{display:grid;gap:16px}.rule-box{padding:20px}.timeline{display:grid;gap:14px}.timeline article{border-left:4px solid var(--brand);padding:14px 18px;background:#fff;border-radius:16px;border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.category-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.category-list a{display:block;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.notice{padding:14px 16px;background:#fff8e8;border:1px solid #f5ddb4;border-radius:16px;color:#79531a}.site-footer{background:#132033;color:#e8eef8;margin-top:40px}.site-footer a{color:#fff;text-decoration:underline;text-underline-offset:4px}.footer-grid{max-width:1180px;margin:auto;padding:34px 18px;display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:24px}.footer-logo img{box-shadow:none}.footer-grid p{color:#c5d0dc}.footer-grid h2{font-size:18px}.domain-chip{display:inline-flex;background:#eaf2ff;color:#224c84;border-radius:999px;padding:5px 10px;font-weight:700}.contact-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--shadow)}.share-row{display:flex;gap:10px;flex-wrap:wrap}.share-row button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 12px;cursor:pointer}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media (max-width:960px){.hero,.content-layout{grid-template-columns:1fr}.grid-3,.video-grid,.author-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr}.stat-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:640px){.header-inner{align-items:flex-start;flex-direction:column}.search-row{grid-template-columns:1fr}.grid-3,.grid-2,.video-grid,.author-grid,.comment-grid,.category-list{grid-template-columns:1fr}.hero-copy{padding:24px}.section-title{display:block}.brand-logo strong{font-size:24px}}