*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;background:#f0f2f5;color:#333;min-height:100vh}.app{max-width:900px;margin:0 auto;padding:20px}.top-nav{display:flex;gap:4px;margin-bottom:24px;background:#fff;border-radius:10px;padding:6px;box-shadow:0 1px 3px #00000014}.nav-link{flex:1;text-align:center;padding:10px 16px;text-decoration:none;color:#666;border-radius:8px;font-size:15px;font-weight:500;transition:all .2s}.nav-link:hover{color:#1a73e8;background:#e8f0fe}.nav-link.active{color:#fff;background:#1a73e8}.main-content{background:#fff;border-radius:10px;padding:32px;box-shadow:0 1px 3px #00000014;min-height:400px}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:6px;font-weight:600;font-size:14px;color:#555}.form-group input[type=text],.form-group input[type=password],.form-group input[type=number],.form-group textarea,.form-group select{width:100%;padding:10px 12px;border:1px solid #ddd;border-radius:6px;font-size:14px;transition:border-color .2s}.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:#1a73e8;box-shadow:0 0 0 3px #1a73e81a}.form-group textarea{resize:vertical;min-height:80px}.form-group .hint{font-size:12px;color:#999;margin-top:4px}.btn{padding:10px 24px;border:none;border-radius:6px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s}.btn-primary{background:#1a73e8;color:#fff}.btn-primary:hover{background:#1557b0}.btn-primary:disabled{background:#a0c4f1;cursor:not-allowed}.btn-danger{background:#e53e3e;color:#fff}.btn-danger:hover{background:#c53030}.btn-secondary{background:#e2e8f0;color:#4a5568}.btn-secondary:hover{background:#cbd5e0}.btn-small{padding:6px 14px;font-size:13px}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .2s}.modal-content{background:#fff;border-radius:12px;padding:28px;width:90%;max-width:600px;max-height:80vh;overflow-y:auto;box-shadow:0 8px 32px #0003;animation:slideUp .2s}.modal-content h2{margin-bottom:16px;font-size:20px}.modal-close{float:right;background:none;border:none;font-size:24px;cursor:pointer;color:#999;line-height:1}.modal-close:hover{color:#333}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.alert{padding:12px 16px;border-radius:6px;margin-bottom:16px;font-size:14px}.alert-error{background:#fff5f5;color:#c53030;border:1px solid #fed7d7}.alert-success{background:#f0fff4;color:#276749;border:1px solid #c6f6d5}.alert-info{background:#ebf8ff;color:#2b6cb0;border:1px solid #bee3f8}.alert-warning{background:#fffdf0;color:#975a16;border:1px solid #fbd38d}.app-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:16px;color:#999;font-size:14px}.app-loading-spinner{width:36px;height:36px;border:3px solid #e2e8f0;border-top-color:#1a73e8;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}