:root{--bg-primary:#f5f5f7;--bg-secondary:#fff;--bg-tertiary:#fafafa;--bg-elevated:#fff;--bg-glass:hsla(0,0%,100%,.72);--bg-hover:rgba(0,0,0,.04);--bg-active:rgba(0,0,0,.06);--text-primary:#1d1d1f;--text-secondary:#6e6e73;--text-tertiary:#86868b;--text-inverse:#fff;--border-color:rgba(0,0,0,.08);--border-strong:rgba(0,0,0,.12);--accent:#0071e3;--accent-hover:#0077ed;--accent-light:rgba(0,113,227,.1);--success:#34c759;--success-light:rgba(52,199,89,.12);--warning:#ff9500;--warning-light:rgba(255,149,0,.12);--danger:#ff3b30;--danger-light:rgba(255,59,48,.12);--purple:#af52de;--purple-light:rgba(175,82,222,.12);--shadow-sm:0 1px 3px rgba(0,0,0,.04),0 1px 2px rgba(0,0,0,.06);--shadow-md:0 4px 12px rgba(0,0,0,.06),0 1px 4px rgba(0,0,0,.04);--shadow-lg:0 12px 40px rgba(0,0,0,.08),0 4px 12px rgba(0,0,0,.04);--shadow-xl:0 24px 60px rgba(0,0,0,.12),0 8px 24px rgba(0,0,0,.06);--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--radius-full:9999px;--sidebar-w:240px;--topbar-h:56px;--transition:0.2s cubic-bezier(0.4,0,0.2,1)}[data-theme=dark]{--bg-primary:#000;--bg-secondary:#1c1c1e;--bg-tertiary:#2c2c2e;--bg-elevated:#1c1c1e;--bg-glass:rgba(28,28,30,.72);--bg-hover:hsla(0,0%,100%,.06);--bg-active:hsla(0,0%,100%,.1);--text-primary:#f5f5f7;--text-secondary:#aeaeb2;--text-tertiary:#636366;--text-inverse:#000;--border-color:hsla(0,0%,100%,.08);--border-strong:hsla(0,0%,100%,.15);--accent:#0a84ff;--accent-hover:#409cff;--accent-light:rgba(10,132,255,.15);--success:#30d158;--success-light:rgba(48,209,88,.15);--warning:#ff9f0a;--warning-light:rgba(255,159,10,.15);--danger:#ff453a;--danger-light:rgba(255,69,58,.15);--purple:#bf5af2;--purple-light:rgba(191,90,242,.15);--shadow-sm:0 1px 3px rgba(0,0,0,.3);--shadow-md:0 4px 12px rgba(0,0,0,.3);--shadow-lg:0 12px 40px rgba(0,0,0,.4);--shadow-xl:0 24px 60px rgba(0,0,0,.5)}*{margin:0;padding:0;box-sizing:border-box}body,html{font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,SF Pro Text,Helvetica Neue,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background var(--transition),color var(--transition)}a{color:inherit;text-decoration:none}.app-layout{display:flex;min-height:100vh}.sidebar{width:var(--sidebar-w);background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-right:1px solid var(--border-color);display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0;z-index:100}.sidebar-logo{padding:16px 20px;display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;color:var(--text-primary);border-bottom:1px solid var(--border-color)}.sidebar-nav{flex:1 1;overflow-y:auto;padding:8px 0}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 20px;font-size:14px;color:var(--text-secondary);cursor:pointer;transition:all var(--transition);border-left:3px solid transparent}.nav-item:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-item.active{background:var(--accent-light);color:var(--accent);border-left-color:var(--accent);font-weight:600}.main-area{margin-left:var(--sidebar-w);flex:1 1;display:flex;flex-direction:column;min-height:100vh}.topbar{height:var(--topbar-h);background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:-webkit-sticky;position:sticky;top:0;z-index:50}.topbar-title{font-size:17px;font-weight:600}.topbar-actions{display:flex;align-items:center;gap:8px}.content{flex:1 1;padding:24px}.card{background:var(--bg-secondary);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);border:1px solid var(--border-color);overflow:hidden;transition:box-shadow var(--transition)}.card:hover{box-shadow:var(--shadow-md)}.card-header{padding:16px 20px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.card-title{font-size:15px;font-weight:600}.card-body{padding:20px}.stat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));grid-gap:16px;gap:16px;margin-bottom:24px}.stat-card{background:var(--bg-secondary);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-sm);border:1px solid var(--border-color);transition:all var(--transition)}.stat-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.stat-icon{width:40px;height:40px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;margin-bottom:12px}.stat-value{font-size:28px;font-weight:700;letter-spacing:-.5px}.stat-label{font-size:13px;color:var(--text-secondary);margin-top:4px}.stat-trend{font-size:12px;margin-top:8px;display:flex;gap:4px}.btn,.stat-trend{align-items:center}.btn{display:inline-flex;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);border:none;font-size:14px;font-weight:500;cursor:pointer;transition:all var(--transition);background:var(--bg-tertiary);color:var(--text-primary)}.btn:hover{background:var(--bg-hover)}.btn:active{transform:scale(.97)}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-success{background:var(--success);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{opacity:.9}.btn-ghost{background:transparent;border:1px solid var(--border-strong)}.btn-ghost:hover{background:var(--bg-hover)}.btn-sm{padding:5px 10px;font-size:13px}.btn-lg{padding:12px 24px;font-size:16px}.form-group{margin-bottom:16px}.form-label{display:block;font-size:13px;font-weight:600;color:var(--text-secondary);margin-bottom:6px}.form-input,.form-select,.form-textarea{width:100%;padding:10px 14px;border-radius:var(--radius-sm);border:1px solid var(--border-strong);background:var(--bg-tertiary);color:var(--text-primary);font-size:14px;transition:all var(--transition);outline:none}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}.form-textarea{min-height:80px;resize:vertical;font-family:inherit}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}th{text-align:left;font-size:12px;font-weight:600;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px;white-space:nowrap}td,th{padding:12px 16px;border-bottom:1px solid var(--border-color)}td{font-size:14px;color:var(--text-primary)}tr:last-child td{border-bottom:none}tr:hover td{background:var(--bg-hover)}.badge{display:inline-flex;align-items:center;padding:2px 10px;border-radius:var(--radius-full);font-size:12px;font-weight:600}.badge-success{background:var(--success-light);color:var(--success)}.badge-warning{background:var(--warning-light);color:var(--warning)}.badge-danger{background:var(--danger-light);color:var(--danger)}.badge-info{background:var(--accent-light);color:var(--accent)}.badge-purple{background:var(--purple-light);color:var(--purple)}.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg-primary)}.login-card{width:380px;background:var(--bg-secondary);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);padding:40px 32px;border:1px solid var(--border-color)}.login-logo{width:56px;height:56px;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--accent),var(--purple));display:flex;align-items:center;justify-content:center;margin:0 auto 20px}.login-title{text-align:center;font-size:22px;font-weight:700;margin-bottom:4px}.login-subtitle{text-align:center;font-size:14px;color:var(--text-secondary);margin-bottom:28px}.theme-toggle{width:36px;height:36px;border-radius:var(--radius-full);border:1px solid var(--border-color);background:var(--bg-tertiary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}.theme-toggle:hover{background:var(--bg-hover);border-color:var(--border-strong)}.loading{padding:40px;font-size:14px}.empty-state,.loading{text-align:center;color:var(--text-tertiary)}.empty-state{padding:60px 20px}@keyframes spin{to{transform:rotate(1turn)}}.spin{animation:spin .8s linear infinite}.progress-bar{width:100%;height:6px;background:var(--bg-tertiary);overflow:hidden}.progress-bar,.progress-fill{border-radius:var(--radius-full)}.progress-fill{height:100%;background:var(--accent);transition:width .3s ease}.upload-zone{border:2px dashed var(--border-strong);border-radius:var(--radius-lg);padding:40px;text-align:center;cursor:pointer;transition:all var(--transition)}.upload-zone.dragging,.upload-zone:hover{border-color:var(--accent);background:var(--accent-light)}.flex{display:flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.gap-4{gap:4px}.gap-6{gap:6px}.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}.flex-1{flex:1 1}.flex-wrap{flex-wrap:wrap}.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}.text-center{text-align:center}.text-sm{font-size:13px}.text-lg{font-size:17px}.text-xl{font-size:20px}.font-bold{font-weight:700}.font-semibold{font-weight:600}.text-secondary{color:var(--text-secondary)}.text-tertiary{color:var(--text-tertiary)}.text-accent{color:var(--accent)}.text-success{color:var(--success)}.text-danger{color:var(--danger)}.text-warning{color:var(--warning)}.w-full{width:100%}.cursor-pointer{cursor:pointer}.p-16{padding:16px}.p-20{padding:20px}.relative{position:relative}.overflow-hidden{overflow:hidden}