:root{--color-primary:#4a90a4;--color-primary-light:#6ba8b9;--color-primary-dark:#3a7a94;--color-secondary:#7b9e87;--color-accent:#e8b86d;--color-success:#5daf6e;--color-warning:#e8a94d;--color-error:#e05a5a;--bg-primary:#fafbfc;--bg-secondary:#fff;--bg-tertiary:#f2f4f6;--text-primary:#1a1d21;--text-secondary:#5c6670;--text-muted:#8f99a3;--border-color:#e4e8eb;--divider-color:#eef1f3;--shadow-sm:0 1px 2px #0000000a;--shadow-md:0 2px 8px #0000000f;--shadow-lg:0 4px 16px #00000014;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-full:9999px;--spacing-xs:4px;--spacing-sm:8px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--spacing-2xl:48px;--spacing-3xl:64px;--transition-fast:.15s ease;--transition-normal:.2s ease;--transition-slow:.3s ease;--font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;--font-size-xs:12px;--font-size-sm:14px;--font-size-md:16px;--font-size-lg:18px;--font-size-xl:22px;--font-size-2xl:28px;--font-size-3xl:36px;--header-height:60px;--max-content-width:960px}[data-theme=dark]{--color-primary:#5bafbf;--color-primary-light:#7cc5d3;--color-primary-dark:#4a9aad;--color-secondary:#8bb597;--color-accent:#f0c97a;--color-success:#6fc47e;--color-warning:#f0b85a;--color-error:#e87070;--bg-primary:#13161a;--bg-secondary:#1c2026;--bg-tertiary:#262b32;--text-primary:#eaeef2;--text-secondary:#a8b4c0;--text-muted:#6b7785;--border-color:#2e353d;--divider-color:#262b32;--shadow-sm:0 1px 2px #0003;--shadow-md:0 2px 8px #00000040;--shadow-lg:0 4px 16px #0000004d}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizelegibility;font-size:16px}body{font-family:var(--font-family);font-size:var(--font-size-md);color:var(--text-primary);background-color:var(--bg-primary);min-height:100vh;transition:background-color var(--transition-normal), color var(--transition-normal);line-height:1.6}a{color:var(--color-primary);transition:color var(--transition-fast);text-decoration:none}a:hover{color:var(--color-primary-dark)}button{font-family:inherit;font-size:inherit;cursor:pointer;background:0 0;border:none}input,textarea,select{font-family:inherit;font-size:inherit}img{max-width:100%;height:auto;display:block}ul,ol{list-style:none}h1,h2,h3,h4,h5,h6{letter-spacing:-.02em;font-weight:600;line-height:1.3}::selection{background-color:var(--color-primary);color:#fff}:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}