:root{--bg: #f2f4f7;--surface: #fff;--border: #e5e8ec;--text: #1a1d21;--muted: #7b8794;--primary: #2d8cf0;--danger: #f56c6c;--sidebar-bg: #1f2437;--sidebar-fg: #b9c0d4;--sidebar-fg-active: #fff;--sidebar-w: 224px;--sidebar-w-collapsed: 64px;--topbar-h: 56px;color-scheme:light}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.6 system-ui,-apple-system,Segoe UI,Microsoft YaHei,sans-serif}.gate-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:var(--bg)}.gate-card{width:100%;max-width:420px;padding:48px 40px 36px;background:var(--surface);border-radius:16px;box-shadow:0 8px 32px #1f243714;text-align:center}.gate-brand{display:flex;align-items:center;justify-content:center;gap:10px;margin-bottom:28px}.gate-brand-mark{padding:5px 8px;border-radius:6px;background:var(--primary);color:#fff;font-size:13px;font-weight:700;letter-spacing:.08em}.gate-brand-name{font-size:20px;font-weight:700}.gate-title{margin:0 0 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