:root{--brand: #ED6D00;--brand-dark: #c95d00;--brand-tint: #fff3e8;--brand-ring: rgba(237,109,0,.28);--bg: #f4f6f9;--card: #ffffff;--surface-alt: #fafbfd;--line: #e3e9f0;--line-strong: #d3dce6;--line-soft: #eef2f6;--text: #16283a;--text-reg: #43566a;--muted: #78899a;--placeholder: #a8b4c0;--ok: #157f52;--ok-bg: #e6f3ec;--ok-line: #cde7d8;--warn: #a9660a;--warn-bg: #fbf0da;--warn-line: #f1ddb4;--err: #b23b32;--err-bg: #fbeae8;--err-line: #f3d2ce;--serif: Georgia, "Times New Roman", "Songti SC", ui-serif, serif;--sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;--radius: 12px;--radius-sm: 8px;--header-h: 64px;--shadow: 0 1px 2px rgba(16,40,58,.04), 0 6px 20px rgba(16,40,58,.06);--shadow-soft: 0 1px 2px rgba(16,40,58,.05)}*{box-sizing:border-box}html,body{height:100%}body{margin:0;background:var(--bg);color:var(--text);line-height:1.6;font-family:var(--sans);font-size:16px;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.tabular{font-variant-numeric:tabular-nums}header{height:var(--header-h);background:var(--card);border-bottom:1px solid var(--line);box-shadow:0 1px 3px #10283a0a;display:flex;align-items:center;padding:0 32px;gap:36px;position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:15px}.brand .logo-img{height:34px;width:auto;display:block}.brand .divider{width:1px;height:26px;background:var(--line)}.brand .name{font-family:var(--serif);font-size:19px;font-weight:600;letter-spacing:.2px;color:var(--text)}nav{display:flex;gap:6px;margin-left:20px;height:100%}nav a{display:flex;align-items:center;padding:0 18px;height:100%;font-size:15px;color:var(--text-reg);text-decoration:none;border-bottom:3px solid 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