:root{--primary:#183a63;--accent:#c9a962;--bg:#f6f7fb;--text:#1f2937;--muted:#6b7280;--border:#e5e7eb;--card:#fff;--danger:#b91c1c;--green:#127c55}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.75}.topbar{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.wrap{max-width:1120px;margin:0 auto;padding:0 18px}.nav{height:64px;display:flex;align-items:center;justify-content:space-between}.brand{font-size:20px;font-weight:800;color:var(--primary);text-decoration:none}.navlinks a{color:#374151;text-decoration:none;margin-left:20px;font-size:14px}.navlinks a:hover{color:var(--primary)}.hero{background:linear-gradient(135deg,#183a63,#255f9e);color:#fff;padding:58px 0 46px}.hero h1{font-size:38px;line-height:1.25;margin:0 0 12px}.hero p{font-size:17px;opacity:.9;max-width:720px;margin:0 0 24px}.btn{display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:10px;padding:10px 18px;text-decoration:none;cursor:pointer;font-size:14px;font-weight:700}.btn-primary{background:var(--accent);color:#1f2937}.btn-outline{background:#fff;color:var(--primary);border:1px solid var(--border)}.btn-dark{background:var(--primary);color:#fff}.section{padding:34px 0}.section-title{display:flex;align-items:end;justify-content:space-between;margin-bottom:18px}.section-title h2{font-size:24px;margin:0;color:#111827}.section-title p{margin:0;color:var(--muted);font-size:14px}.category-tabs{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 22px}.category-tabs a{background:#fff;border:1px solid var(--border);border-radius:999px;padding:7px 14px;text-decoration:none;color:#374151;font-size:14px}.category-tabs a.active{background:var(--primary);color:#fff;border-color:var(--primary)}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:#fff;border:1px solid var(--border);border-radius:16px;overflow:hidden;box-shadow:0 4px 18px rgba(0,0,0,.04)}.cover{height:210px;background:#eef2f7;display:flex;align-items:center;justify-content:center;overflow:hidden}.cover img{width:100%;height:100%;object-fit:cover}.cover .empty{color:#9ca3af}.card-body{padding:16px}.tag{display:inline-block;font-size:12px;color:#815e10;background:#fff7dd;border:1px solid #f1dd9c;padding:2px 8px;border-radius:999px;margin-bottom:8px}.card h3{font-size:18px;margin:0 0 6px}.card p{font-size:14px;color:var(--muted);margin:0 0 12px;min-height:48px}.meta{font-size:13px;color:#6b7280;margin-bottom:12px}.card-actions{display:flex;gap:10px;flex-wrap:wrap}.detail{display:grid;grid-template-columns:420px 1fr;gap:28px}.detail-cover{background:#fff;border:1px solid var(--border);border-radius:18px;overflow:hidden}.detail-cover img{width:100%;display:block}.detail-main{background:#fff;border:1px solid var(--border);border-radius:18px;padding:24px}.detail-main h1{margin:0 0 10px;color:#111827}.detail-main .desc{color:#4b5563}.notice{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;border-radius:14px;padding:14px;margin:18px 0}.article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.article-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:18px}.article-card h3{margin:0 0 8px;font-size:17px}.article-card a{text-decoration:none;color:var(--primary)}.footer{padding:28px 0;text-align:center;color:#9ca3af;font-size:13px}.preview-frame{width:100%;height:calc(100vh - 84px);border:0;background:#fff}.empty-box{background:#fff;border:1px dashed var(--border);border-radius:14px;padding:28px;text-align:center;color:#6b7280}@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}.detail{grid-template-columns:1fr}.hero h1{font-size:30px}.nav{height:auto;padding:14px 0;display:block}.navlinks{margin-top:8px}.navlinks a{margin:0 12px 0 0}.article-list{grid-template-columns:1fr}}@media(max-width:560px){.grid{grid-template-columns:1fr}.hero{padding:38px 0}.hero h1{font-size:26px}.cover{height:230px}.section-title{display:block}.detail-main{padding:18px}}