:root{--bg:#f7f8fb;--card:#fff;--text:#111827;--muted:#667085;--blue:#2563eb;--line:#e5e7eb;--green:#059669;--orange:#ea580c}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75}.wrap{max-width:1080px;margin:0 auto;padding:36px 20px 70px}.hero{background:linear-gradient(135deg,#0f172a,#1d4ed8);color:white;border-radius:24px;padding:40px;margin-bottom:22px;box-shadow:0 18px 40px rgba(15,23,42,.18)}.hero h1{margin:0 0 12px;font-size:38px;line-height:1.18}.hero p{font-size:18px;color:#dbeafe;max-width:860px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px;margin:18px 0;box-shadow:0 8px 26px rgba(15,23,42,.05)}h1,h2,h3{line-height:1.32}h2{font-size:25px;margin:34px 0 12px;border-left:5px solid var(--blue);padding-left:12px}h3{font-size:19px;margin:24px 0 8px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.tile{display:block;text-decoration:none;color:inherit;background:white;border:1px solid var(--line);border-radius:16px;padding:20px;transition:.15s}.tile:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(15,23,42,.08);border-color:#93c5fd}.tile b{color:#0f172a}.muted{color:var(--muted)}.quote{background:#eff6ff;border-left:5px solid #3b82f6;color:#1e3a8a;padding:14px 18px;border-radius:10px;font-weight:650;margin:16px 0}.warn{background:#fff7ed;border-left:5px solid var(--orange);color:#7c2d12;padding:14px 18px;border-radius:10px;margin:16px 0}.green{background:#ecfdf5;border-left:5px solid var(--green);color:#064e3b;padding:14px 18px;border-radius:10px;margin:16px 0}pre{background:#0f172a;color:#e5e7eb;border-radius:14px;padding:18px;overflow:auto;line-height:1.55}table{width:100%;border-collapse:collapse;margin:16px 0}th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}th{background:#f1f5f9}.nav{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 18px}.nav a{background:#fff;border:1px solid var(--line);padding:8px 12px;border-radius:999px;color:#1d4ed8;text-decoration:none}.small{font-size:13px;color:var(--muted)}ul,ol{padding-left:24px}li{margin:6px 0}.tag{display:inline-block;background:#ecfeff;color:#155e75;border:1px solid #a5f3fc;border-radius:999px;padding:3px 10px;margin:4px 6px 4px 0;font-size:13px}