:root{--primary-color:#ff6b6b;--primary-light:#ff8e8e;--primary-dark:#e55a5a;--secondary-color:#4ecdc4;--secondary-light:#6ee0d8;--secondary-dark:#3dbdb5;--accent-color:#ffe66d;--accent-light:#fff4a3;--accent-dark:#ffd93d;--success-color:#6bcb77;--warning-color:#ffd93d;--danger-color:#ff6b6b;--info-color:#4d96ff;--text-primary:#2d3436;--text-secondary:#636e72;--text-muted:#b2bec3;--text-white:#fff;--bg-primary:#fafafa;--bg-secondary:#f5f5f5;--bg-card:#fff;--bg-dark:#2d3436;--border-color:#e0e0e0;--border-radius:12px;--border-radius-sm:8px;--border-radius-lg:16px;--shadow-sm:0 2px 4px #0000000d;--shadow-md:0 4px 8px #0000001a;--shadow-lg:0 8px 16px #00000026;--font-family:"PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;--font-size-base:16px;--font-size-sm:14px;--font-size-lg:18px;--font-size-xl:24px;--font-size-xxl:32px}*{box-sizing:border-box;margin:0;padding:0}html,body{font-family:var(--font-family);font-size:var(--font-size-base);color:var(--text-primary);background-color:var(--bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}#app{min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:0 20px}.container-sm{max-width:800px}.container-lg{max-width:1400px}.card{background:var(--bg-card);border-radius:var(--border-radius);box-shadow:var(--shadow-md);padding:24px;transition:transform .3s,box-shadow .3s}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.card-header{font-size:var(--font-size-lg);margin-bottom:16px;font-weight:600}.btn{border-radius:var(--border-radius);font-size:var(--font-size-base);cursor:pointer;border:none;outline:none;justify-content:center;align-items:center;padding:12px 24px;font-weight:500;transition:all .3s;display:inline-flex}.btn-primary{background:var(--primary-color);color:var(--text-white)}.btn-primary:hover{background:var(--primary-dark);transform:scale(1.05)}.btn-secondary{background:var(--secondary-color);color:var(--text-white)}.btn-secondary:hover{background:var(--secondary-dark);transform:scale(1.05)}.btn-outline{border:2px solid var(--primary-color);color:var(--primary-color);background:0 0}.btn-outline:hover{background:var(--primary-color);color:var(--text-white)}.btn-lg{font-size:var(--font-size-lg);padding:16px 32px}.btn-sm{font-size:var(--font-size-sm);padding:8px 16px}.btn-icon{border-radius:50%;width:48px;height:48px;padding:12px}.input{border:2px solid var(--border-color);border-radius:var(--border-radius);width:100%;font-size:var(--font-size-base);outline:none;padding:12px 16px;transition:border-color .3s}.input:focus{border-color:var(--primary-color)}.input-group{margin-bottom:16px}.input-label{margin-bottom:8px;font-weight:500;display:block}.input-error{color:var(--danger-color);font-size:var(--font-size-sm);margin-top:4px}.underline-input{align-items:center;margin-right:12px;display:inline-flex}.underline-input .letter{border-bottom:3px solid var(--text-primary);text-align:center;width:32px;height:48px;font-size:var(--font-size-xl);color:var(--text-primary);background:0 0;margin-right:4px;font-weight:600;display:inline-block}.underline-input .letter.hint{color:var(--text-muted)}.underline-input .letter.filled{color:var(--text-primary)}.table{border-collapse:collapse;width:100%}.table th,.table td{text-align:left;border-bottom:1px solid var(--border-color);padding:12px 16px}.table th{background:var(--bg-secondary);font-weight:600}.table tr:hover{background:var(--bg-secondary)}.navbar{background:var(--bg-card);box-shadow:var(--shadow-sm);justify-content:space-between;align-items:center;padding:16px 24px;display:flex}.navbar-brand{font-size:var(--font-size-xl);color:var(--primary-color);font-weight:700}.navbar-menu{gap:24px;display:flex}.navbar-item{color:var(--text-secondary);text-decoration:none;transition:color .3s}.navbar-item:hover,.navbar-item.active{color:var(--primary-color)}.sidebar{background:var(--bg-dark);width:260px;min-height:100vh;padding:24px}.sidebar-item{color:var(--text-white);border-radius:var(--border-radius-sm);align-items:center;margin-bottom:8px;padding:12px 16px;text-decoration:none;transition:background .3s;display:flex}.sidebar-item:hover,.sidebar-item.active{background:var(--primary-color)}.page{min-height:100vh;padding:24px}.page-header{margin-bottom:24px}.page-title{font-size:var(--font-size-xxl);color:var(--text-primary);font-weight:700}.page-content{background:var(--bg-card);border-radius:var(--border-radius);padding:24px}.grid{gap:24px;display:grid}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.flex{display:flex}.flex-center{justify-content:center;align-items:center}.flex-between{justify-content:space-between;align-items:center}.flex-wrap{flex-wrap:wrap}.gap-sm{gap:8px}.gap-md{gap:16px}.gap-lg{gap:24px}.mt-sm{margin-top:8px}.mt-md{margin-top:16px}.mt-lg{margin-top:24px}.mb-sm{margin-bottom:8px}.mb-md{margin-bottom:16px}.mb-lg{margin-bottom:24px}.p-sm{padding:8px}.p-md{padding:16px}.p-lg{padding:24px}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.text-primary{color:var(--primary-color)}.text-secondary{color:var(--text-secondary)}.text-muted{color:var(--text-muted)}.text-success{color:var(--success-color)}.text-danger{color:var(--danger-color)}.font-bold{font-weight:700}.font-medium{font-weight:500}.loading{justify-content:center;align-items:center;padding:48px;display:flex}.loading-spinner{border:4px solid var(--border-color);border-top-color:var(--primary-color);border-radius:50%;width:48px;height:48px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.progress-bar{background:var(--bg-secondary);border-radius:4px;width:100%;height:8px;overflow:hidden}.progress-bar-fill{background:var(--primary-color);border-radius:4px;height:100%;transition:width .3s}.tag{font-size:var(--font-size-sm);border-radius:20px;align-items:center;padding:4px 12px;font-weight:500;display:inline-flex}.tag-primary{background:var(--primary-light);color:var(--primary-dark)}.tag-success{background:var(--success-color);color:var(--text-white)}.tag-warning{background:var(--warning-color);color:var(--text-primary)}.tag-danger{background:var(--danger-color);color:var(--text-white)}@media (width<=768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.sidebar{z-index:1000;width:100%;transition:left .3s;position:fixed;top:0;left:-100%}.sidebar.open{left:0}.navbar{padding:12px 16px}.page{padding:16px}}.modal-overlay{z-index:1000;background:#00000080;justify-content:center;align-items:center;width:100%;height:100%;display:flex;position:fixed;top:0;left:0}.modal{background:var(--bg-card);border-radius:var(--border-radius-lg);width:90%;max-width:500px;box-shadow:var(--shadow-lg);padding:32px}.modal-header{font-size:var(--font-size-lg);margin-bottom:16px;font-weight:600}.modal-footer{justify-content:flex-end;gap:12px;margin-top:24px;display:flex}.empty{color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;padding:48px;display:flex}.empty-icon{margin-bottom:16px;font-size:64px}.empty-text{font-size:var(--font-size-lg)}