:root{--color-primary: #ff6b35;--color-primary-light: #ff8c5a;--color-dark: #1a1a2e;--color-success: #2e7d32;--color-error: #c62828;--color-warning: #f9a825;--color-info: #1565c0;--color-bg: #f5f5f5;--color-card: #ffffff;--color-text: #1a1a2e;--color-muted: #888888;--color-border: #eeeeee;--color-menu-active-bg: #fff0e8;--space-xs: 4px;--space-sm: 8px;--space-md: 12px;--space-lg: 16px;--space-xl: 24px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--sidebar-width: 168px;--topbar-height: 48px;--font-sans: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;--ease: cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}html,body,#root{height:100%}body{font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text);line-height:1.6;font-size:14px}a{color:inherit;text-decoration:none}button,input,select,textarea{font-family:inherit}.app-shell{min-height:100%;display:flex;flex-direction:column}.topbar{height:var(--topbar-height);background:var(--color-dark);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 16px;flex-shrink:0}.topbar-brand{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600}.topbar-dots{display:flex;gap:5px}.topbar-dot{width:8px;height:8px;border-radius:50%}.topbar-user{display:flex;align-items:center;gap:12px;font-size:12px;color:#aaa}.shell-body{flex:1;display:flex;min-height:0}.sidebar{width:var(--sidebar-width);background:#fff;border-right:1px solid var(--color-border);padding:8px 0;flex-shrink:0}.side-menu{display:flex;align-items:center;gap:6px;padding:10px 16px;font-size:13px;color:#555;cursor:pointer;border-right:3px solid transparent;transition:background .15s var(--ease),color .15s var(--ease)}.side-menu:hover{background:#fff8f4}.side-menu.active{background:var(--color-menu-active-bg);color:var(--color-primary);font-weight:600;border-right-color:var(--color-primary)}.main{flex:1;min-width:0;padding:16px 20px;overflow:auto}.page-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;gap:12px}.page-title{font-size:20px;font-weight:600;color:var(--color-dark)}.page-sub{font-size:12px;color:var(--color-muted)}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:16px}.stat-card{background:var(--color-card);border-radius:var(--radius-md);padding:16px;box-shadow:0 1px 3px #0000000f}.stat-card .v{font-size:24px;font-weight:700;color:var(--color-primary)}.stat-card .l{font-size:12px;color:var(--color-muted);margin-top:4px}.card{background:var(--color-card);border-radius:var(--radius-md);padding:16px;box-shadow:0 1px 3px #0000000f}.card+.card{margin-top:12px}.card-title{font-size:14px;font-weight:600;margin-bottom:12px;color:#333}.table-wrap{overflow-x:auto}table.data{width:100%;border-collapse:collapse;font-size:13px}table.data th{background:#fafafa;padding:10px 12px;text-align:left;font-weight:600;border-bottom:2px solid #eee;color:#555}table.data td{padding:10px 12px;border-bottom:1px solid #f0f0f0;color:#333}table.data tbody tr:hover{background:#fafafa}table.data tbody tr.clickable{cursor:pointer}.badge{display:inline-block;padding:2px 8px;border-radius:3px;font-size:12px;font-weight:500}.badge-pass{background:#e8f5e9;color:var(--color-success)}.badge-fail{background:#ffebee;color:var(--color-error)}.badge-info{background:#e3f2fd;color:var(--color-info)}.badge-warn{background:#fff8e1;color:var(--color-warning)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;border-radius:6px;padding:8px 16px;font-size:13px;font-weight:600;cursor:pointer;transition:opacity .15s var(--ease)}.btn:hover:not(:disabled){opacity:.88}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:#fff}.btn-outline{background:#fff;color:var(--color-primary);border:1px solid var(--color-primary)}.btn-ghost{background:transparent;color:#aaa}.btn-row{display:flex;gap:8px;flex-wrap:wrap}.field{margin-bottom:12px}.field label{display:block;font-size:12px;color:#666;margin-bottom:4px}.field input,.field select,.field textarea{width:100%;border:1px solid #e0e0e0;border-radius:var(--radius-sm);padding:8px 10px;font-size:13px;background:#fff;color:var(--color-text)}.field textarea{min-height:80px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--color-primary)}.muted{color:var(--color-muted);font-size:12px}.empty,.error,.loading{padding:24px;text-align:center;color:var(--color-muted);font-size:13px}.error{color:var(--color-error)}.note{background:#fff8f0;border-left:4px solid var(--color-primary);padding:10px 14px;border-radius:0 var(--radius-md) var(--radius-md) 0;font-size:13px;color:#555}.note strong{color:var(--color-primary)}.split{display:flex;gap:12px;min-height:480px}.split-left{flex:1;min-width:220px}.split-right{flex:2;min-width:0}.step-item{padding:10px 12px;background:#f9f9f9;border-radius:var(--radius-sm);margin-bottom:6px;cursor:pointer;border-left:3px solid transparent}.step-item.active{background:var(--color-menu-active-bg);border-left-color:var(--color-primary)}.step-item .t{font-weight:600;font-size:13px}.step-item.active .t{color:var(--color-primary)}.step-item .d{color:var(--color-muted);font-size:12px;margin-top:2px}.hud-box{background:#f5f5f5;padding:8px 10px;border-radius:var(--radius-sm);font-family:ui-monospace,Consolas,monospace;color:#333;line-height:1.7;font-size:13px}.video-stage{background:#000;border-radius:var(--radius-md);position:relative;min-height:360px;display:flex;align-items:center;justify-content:center;color:#666;overflow:hidden}.video-center{text-align:center}.video-play{font-size:36px;margin-bottom:8px;color:#888}.video-tags{position:absolute;top:10px;left:10px;display:flex;gap:6px}.video-tag{background:#0009;color:#fff;padding:3px 8px;border-radius:3px;font-size:12px;cursor:pointer;border:none}.video-tag.active{background:#ff6b35d9}.video-bar{position:absolute;bottom:10px;left:10px;right:10px;height:4px;background:#333;border-radius:2px}.video-bar>i{display:block;height:100%;width:27%;background:var(--color-primary);border-radius:2px}.score-row{display:flex;justify-content:space-between;padding:8px 4px;border-bottom:1px solid #f0f0f0;font-size:13px}.score-row.focus{background:#fff0e8;padding-left:8px}.score-row.warn{background:#fff8e1}.score-ok{color:var(--color-success);font-weight:600}.score-warn{color:var(--color-warning);font-weight:600}.score-fail{color:var(--color-error);font-weight:600}.login-page{min-height:100%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--color-dark),#2d2d44)}.login-card{width:380px;background:#fff;border-radius:var(--radius-lg);padding:32px 28px;box-shadow:0 8px 32px #0003}.login-card h1{font-size:20px;margin-bottom:6px}.login-card p{color:var(--color-muted);font-size:13px;margin-bottom:20px}.login-card .btn{width:100%;margin-top:8px;padding:10px}.toast{position:fixed;top:64px;right:20px;background:var(--color-dark);color:#fff;padding:10px 16px;border-radius:var(--radius-md);font-size:13px;z-index:50;box-shadow:0 4px 16px #0003}.course-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.course-tab{border:1px solid #eee;background:#fff;border-radius:6px;padding:6px 12px;font-size:12px;cursor:pointer}.course-tab.active{background:var(--color-menu-active-bg);color:var(--color-primary);border-color:var(--color-primary);font-weight:600}.glass-preview{background:#000;color:#fff;font-family:ui-monospace,Consolas,monospace;padding:14px;border-radius:var(--radius-md);min-height:220px}.glass-preview .gold{color:gold;font-weight:700}.env-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.env-item{background:#fafafa;border-radius:var(--radius-sm);padding:12px}.env-item .k{font-size:12px;color:var(--color-muted)}.env-item .u{font-size:13px;margin-top:4px;word-break:break-all}@media(max-width:1100px){.stats-grid,.env-grid{grid-template-columns:repeat(2,1fr)}.split{flex-direction:column}}@media(max-width:768px){.sidebar{width:120px}.stats-grid,.env-grid{grid-template-columns:1fr}}