:root{--bg:#f7f8fb;--card:#fff;--ink:#1f2937;--muted:#6b7280;--line:#e5e7eb;--brand:#111827;--accent:#e11d48;--soft:#fff1f2;--blue:#2563eb;--green:#16a34a;--shadow:0 12px 35px rgba(15,23,42,.08)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}.topbar{max-width:1180px;margin:auto;padding:14px 18px;display:flex;align-items:center;justify-content:space-between;gap:18px}.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:24px;letter-spacing:.5px}.logo-mark{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,#111827,#e11d48);display:grid;place-items:center;color:#fff;font-size:20px;box-shadow:var(--shadow)}.nav{display:flex;gap:18px;flex-wrap:wrap;font-size:15px}.nav a{color:#374151;font-weight:600}.nav a:hover{color:var(--accent)}.search-wrap{background:#fff;border-bottom:1px solid var(--line)}.search{max-width:1180px;margin:auto;padding:14px 18px;display:flex;gap:10px}.search input{flex:1;border:1px solid var(--line);border-radius:999px;padding:13px 18px;font-size:15px;outline:none;background:#fafafa}.search button{border:0;border-radius:999px;background:var(--brand);color:#fff;padding:0 22px;font-weight:700;cursor:pointer}.search-tip{max-width:1180px;margin:-6px auto 12px;padding:0 18px;color:var(--muted);font-size:13px}.container{max-width:1180px;margin:24px auto;padding:0 18px}.grid{display:grid;gap:18px}.hero{grid-template-columns:1.45fr .75fr;align-items:stretch}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);overflow:hidden}.pad{padding:22px}.label{display:inline-flex;align-items:center;gap:6px;background:var(--soft);color:var(--accent);border-radius:999px;padding:5px 10px;font-size:13px;font-weight:800}.meta{display:flex;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:13px}.h1{font-size:36px;line-height:1.25;margin:14px 0 10px}.h2{font-size:25px;margin:0 0 14px}.h3{font-size:19px;margin:0 0 8px}.lead{font-size:17px;color:#4b5563}.section-title{display:flex;align-items:end;justify-content:space-between;margin:28px 0 14px}.section-title p{margin:0;color:var(--muted);font-size:14px}.news-list{display:grid;gap:12px}.news-item{display:grid;grid-template-columns:112px 1fr;gap:14px;padding:12px;border:1px solid var(--line);border-radius:18px;background:#fff}.thumb{height:78px;border-radius:14px;object-fit:cover}.tag-row{display:flex;gap:8px;flex-wrap:wrap}.tag{font-size:12px;color:#374151;background:#f3f4f6;border-radius:999px;padding:4px 9px}.columns{grid-template-columns:repeat(3,1fr)}.two{grid-template-columns:2fr 1fr}.video-card{position:relative;overflow:hidden}.video-cover{position:relative}.video-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}.play{position:absolute;inset:0;display:grid;place-items:center;background:rgba(17,24,39,.18);opacity:0;transition:.2s}.play span{width:60px;height:60px;border-radius:50%;background:rgba(255,255,255,.92);display:grid;place-items:center;color:var(--accent);font-weight:900;font-size:24px}.video-card:hover .play{opacity:1}.stats{display:flex;justify-content:space-between;gap:8px;color:var(--muted);font-size:13px;margin-top:10px}.topic{background:linear-gradient(135deg,#fff,#fff7ed);border:1px solid #fed7aa;border-radius:22px;padding:20px}.author{display:flex;align-items:center;gap:12px}.avatar{width:52px;height:52px;border-radius:50%;background:#f3f4f6;object-fit:cover}.faq details{border:1px solid var(--line);background:#fff;border-radius:16px;margin-bottom:10px;padding:14px 16px}.faq summary{font-weight:800;cursor:pointer}.comment{border-left:4px solid var(--accent);background:#fff;padding:14px;border-radius:14px;border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.footer{margin-top:36px;background:#111827;color:#e5e7eb}.footer-inner{max-width:1180px;margin:auto;padding:28px 18px;display:grid;grid-template-columns:1.4fr .8fr .8fr;gap:20px}.footer a{color:#e5e7eb}.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:12px}.article{background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px;box-shadow:var(--shadow)}.article h1{font-size:32px;line-height:1.3}.article 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li:before{counter-increment:item;content:counter(item);display:inline-grid;place-items:center;width:24px;height:24px;border-radius:50%;background:#111827;color:#fff;margin-right:8px;font-size:12px}.muted{color:var(--muted)}@media(max-width:900px){.hero,.columns,.two,.footer-inner{grid-template-columns:1fr}.h1{font-size:28px}.topbar{align-items:flex-start;flex-direction:column}.nav{gap:12px}.news-item{grid-template-columns:92px 1fr}.search{flex-direction:column}.search button{height:44px}}