* { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            background: #050810;
            color: #e2e8f0;
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            overflow-x: hidden;
        }
        .container {
            max-width: 1920px;
            margin: 0 auto;
            padding: 10px;
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            grid-template-rows: auto auto auto auto auto auto;
            gap: 10px;
            height: 100vh;
        }
        body.splash-active .container {
            opacity: 0;
            transform: translateY(8px);
        }
        body.app-ready .container {
            animation: main-fade-in 0.65s ease forwards;
        }

        /* 启动页动画 */
        .splash-screen {
            position: fixed;
            inset: 0;
            z-index: 9999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 16px;
            background: radial-gradient(circle at 50% 35%, #111827 0%, #050810 58%, #02040b 100%);
            transition: opacity 0.45s ease, visibility 0.45s ease;
        }
        .splash-screen.is-hidden {
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
        }
        .splash-theme-btn {
            position: absolute;
            top: 18px;
            right: 20px;
            padding: 6px 12px;
            border-radius: 999px;
            border: 1px solid #334155;
            background: rgba(15, 23, 42, 0.72);
            color: #cbd5e1;
            font-size: 0.78rem;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .splash-theme-btn:hover {
            background: rgba(30, 41, 59, 0.9);
            color: #e2e8f0;
            border-color: #475569;
        }
        .splash-logo {
            width: 168px;
            height: 168px;
            border-radius: 50%;
            border: 1px solid #1d4ed8;
            filter: drop-shadow(0 0 18px rgba(56, 189, 248, 0.2));
            opacity: 0;
            transform: scale(0.88);
            animation: splash-logo-in 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
        }
        .splash-title {
            color: #38bdf8;
            font-size: 2.1rem;
            font-weight: 650;
            letter-spacing: 0.03em;
            text-align: center;
            white-space: nowrap;
            overflow: hidden;
            width: 0;
            border-right: 2px solid #38bdf8;
            opacity: 0;
            animation:
                splash-title-show 0.2s ease 0.5s forwards,
                splash-typing 1.05s steps(12, end) 0.5s forwards,
                splash-cursor 0.85s step-end 0.5s infinite;
        }
        .splash-subtitle {
            color: #64748b;
            font-size: 1rem;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            opacity: 0;
            animation: splash-subtitle-in 0.45s ease 1.25s forwards;
        }
        .splash-enter-btn {
            margin-top: 8px;
            min-width: 168px;
            padding: 10px 18px;
            border: 1px solid #0ea5e9;
            border-radius: 999px;
            background: rgba(14, 165, 233, 0.16);
            color: #e0f2fe;
            font-size: 0.95rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            cursor: pointer;
            opacity: 0;
            transform: translateY(6px);
            animation: splash-enter-btn-in 0.4s ease 1.45s forwards;
            transition: transform 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
        }
        .splash-enter-btn:hover {
            background: rgba(14, 165, 233, 0.28);
            box-shadow: 0 0 20px rgba(14, 165, 233, 0.3);
            transform: translateY(-1px);
        }
        .splash-enter-btn:active { transform: translateY(1px); }
        body.light-theme .splash-screen {
            background: radial-gradient(circle at 50% 35%, #f8fafc 0%, #eef2ff 60%, #e2e8f0 100%);
        }
        body.light-theme .splash-title { color: #0284c7; border-right-color: #0284c7; }
        body.light-theme .splash-subtitle { color: #64748b; }
        body.light-theme .splash-theme-btn {
            border-color: #cbd5e1;
            background: rgba(255, 255, 255, 0.86);
            color: #334155;
        }
        body.light-theme .splash-theme-btn:hover {
            background: #ffffff;
            border-color: #94a3b8;
            color: #0f172a;
        }
        body.light-theme .splash-enter-btn {
            border-color: #0284c7;
            background: rgba(2, 132, 199, 0.1);
            color: #075985;
        }
        body.light-theme .splash-enter-btn:hover {
            background: rgba(2, 132, 199, 0.18);
            box-shadow: 0 0 18px rgba(2, 132, 199, 0.22);
        }

        @keyframes splash-logo-in {
            from { opacity: 0; transform: scale(0.88); }
            to { opacity: 1; transform: scale(1); }
        }
        @keyframes splash-title-show {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        @keyframes splash-typing {
            from { width: 0; }
            to { width: 13em; }
        }
        @keyframes splash-cursor {
            0%, 50% { border-right-color: transparent; }
            51%, 100% { border-right-color: currentColor; }
        }
        @keyframes splash-subtitle-in {
            from { opacity: 0; transform: translateY(6px); }
            to { opacity: 1; transform: translateY(0); }
        }
        @keyframes splash-enter-btn-in {
            from { opacity: 0; transform: translateY(6px); }
            to { opacity: 1; transform: translateY(0); }
        }
        @keyframes main-fade-in {
            from { opacity: 0; transform: translateY(8px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* Header */
        header {
            grid-column: 1 / -1;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #0b1220;
            padding: 8px 16px;
            border-radius: 8px;
            border: 1px solid #1e293b;
        }
        .header-brand {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .header-text {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .school-logo {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            object-fit: cover;
            border: 1px solid #1e40af;
            background: transparent;
            flex-shrink: 0;
        }
        h1 { font-size: 1rem; font-weight: 600; color: #38bdf8; }
        .controls { display: flex; gap: 6px; align-items: center; }
        button {
            padding: 5px 12px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            font-size: 0.8rem;
            font-weight: 500;
            transition: all 0.2s;
        }
        .btn-primary { background: #059669; color: white; }
        .btn-primary:hover { background: #047857; }
        .btn-danger { background: #7f1d1d; color: white; }
        .btn-danger:hover { background: #991b1b; }
        .btn-secondary { background: #1e293b; color: #94a3b8; border: 1px solid #334155; }
        .btn-secondary:hover { background: #334155; color: #e2e8f0; }
        .btn-icon {
            background: transparent;
            border: 1px solid #334155;
            color: #94a3b8;
            padding: 2px 7px;
            font-size: 0.85rem;
            border-radius: 4px;
            cursor: pointer;
            line-height: 1;
        }
        .btn-icon:hover { background: #1e293b; color: #e2e8f0; }
        button:disabled { opacity: 0.4; cursor: not-allowed; }

        /* 主题切换（浅色） */
        body.light-theme {
            background: #f8fafc;
            color: #0f172a;
        }
        body.light-theme header,
        body.light-theme .panel,
        body.light-theme .modal-content,
        body.light-theme .hand-map-zoom-content {
            background: #ffffff;
            border-color: #cbd5e1;
        }
        body.light-theme .panel-header,
        body.light-theme .modal-header {
            border-bottom-color: #e2e8f0;
        }
        body.light-theme .stats-bar,
        body.light-theme .duration-label,
        body.light-theme .status {
            color: #475569;
        }
        body.light-theme .stats-bar span,
        body.light-theme .duration-value {
            color: #0f172a;
        }
        body.light-theme .btn-secondary {
            background: #f1f5f9;
            color: #334155;
            border-color: #cbd5e1;
        }
        body.light-theme .btn-secondary:hover {
            background: #e2e8f0;
            color: #0f172a;
        }
        body.light-theme .btn-icon {
            border-color: #cbd5e1;
            color: #475569;
        }
        body.light-theme .btn-icon:hover {
            background: #f1f5f9;
            color: #0f172a;
        }
        body.light-theme .school-logo { border-color: #93c5fd; }
        body.light-theme canvas,
        body.light-theme .data-cell,
        body.light-theme .log-container,
        body.light-theme .imu-bars-v7,
        body.light-theme .imu-bar-track-v7,
        body.light-theme .cell {
            background: #f8fafc;
            border-color: #cbd5e1;
        }
        body.light-theme .data-cell .value,
        body.light-theme .imu-bar-value-v7,
        body.light-theme .log-entry {
            color: #0f172a;
        }
        body.light-theme .data-cell .label,
        body.light-theme .timestamp {
            color: #64748b;
        }
        body.light-theme .modal-overlay {
            background: rgba(241, 245, 249, 0.9);
        }
        body.light-theme .zoom-data-grid,
        body.light-theme .zoom-data-cell {
            background: #f8fafc;
            border-color: #cbd5e1;
        }
        body.light-theme .zoom-data-cell .z-value {
            color: #0f172a;
        }
        body.light-theme .strain-bar-text {
            color: #000000;
            text-shadow: none;
            background: transparent;
            border-radius: 0;
            padding: 0;
        }
        
        .status { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: #64748b; }
        .status-dot { width: 8px; height: 8px; border-radius: 50%; background: #334155; }
        .status-dot.active { background: #22c55e; box-shadow: 0 0 6px #22c55e; }
        .stats-bar { display: flex; gap: 14px; font-size: 0.75rem; color: #475569; margin-top: 2px; }
        .stats-bar > div { display: flex; align-items: baseline; gap: 4px; }
        .stats-bar span {
            color: #94a3b8;
            font-weight: 600;
            font-variant-numeric: tabular-nums;
            font-feature-settings: "tnum" 1;
            font-family: 'Consolas', 'Monaco', monospace;
            display: inline-block;
            min-width: 3ch;
            text-align: right;
        }

        /* 时长显示 */
        .duration-display {
            display: flex;
            gap: 16px;
            margin-right: 12px;
            padding-right: 12px;
            border-right: 1px solid #1e293b;
        }
        .duration-box {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2px;
            min-width: 72px;
        }
        .duration-label {
            font-size: 0.7rem;
            color: #475569;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .duration-value {
            font-size: 1.1rem;
            color: #e2e8f0;
            font-weight: 700;
            font-family: 'Consolas', 'Monaco', monospace;
            letter-spacing: 0.5px;
        }

        /* Row Containers */
        .row {
            grid-column: 1 / -1;
            display: grid;
            gap: 10px;
        }
        .row-pressure { grid-template-columns: repeat(3, 1fr); }
        .row-strain { grid-template-columns: repeat(3, 1fr); }
        .row-combined { grid-template-columns: 2fr 1fr; }
        .row-logs { grid-template-columns: 1fr 1fr; max-height: 180px; }

        /* Panel */
        .panel {
            background: #0f172a;
            border-radius: 8px;
            border: 1px solid #1e293b;
            padding: 10px;
            display: flex;
            flex-direction: column;
            min-height: 0;
            overflow: hidden;
        }
        .panel-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            padding-bottom: 4px;
            border-bottom: 1px solid #1e293b;
        }
        .panel-title { display: flex; align-items: center; gap: 6px; }
        .dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
        
        .thumb-color { color: #fbbf24; }
        .thumb-dot { background: #f59e0b; }
        .index-color { color: #60a5fa; }
        .index-dot { background: #3b82f6; }
        .middle-color { color: #f87171; }
        .middle-dot { background: #ef4444; }
        .wrist-color { color: #4ade80; }
        .wrist-dot { background: #22c55e; }
        .back-color { color: #a78bfa; }
        .back-dot { background: #8b5cf6; }

        canvas {
            width: 100%;
            height: 110px;
            background: #060b14;
            border-radius: 6px;
            flex-shrink: 0;
        }

        /* Data Grid under chart */
        .data-grid {
            display: grid;
            gap: 3px;
            margin-top: 6px;
        }
        .data-grid.pressure-grid-vals { grid-template-columns: repeat(3, 1fr); }
        .data-grid.strain-grid-vals { grid-template-columns: repeat(2, 1fr); }
        .data-grid.imu-grid-vals { grid-template-columns: repeat(3, 1fr); }
        
        .data-cell {
            background: #060b14;
            border-radius: 4px;
            padding: 3px 6px;
            font-family: 'Consolas', 'Monaco', monospace;
            font-size: 0.72rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border: 1px solid #1e293b;
        }
        .data-cell .label { color: #475569; font-size: 0.65rem; }
        .data-cell .value { color: #e2e8f0; font-weight: 600; }

        /* IMU Column */
        .imu-column {
            display: flex;
            flex-direction: column;
            gap: 10px;
            min-height: 0;
        }
        .imu-column .panel {
            flex: 1;
            min-height: 0;
        }

        /* ==================== 手部传感器映射 — 绝对固定布局 ==================== */
        .hand-map-content-v7 {
            display: flex;
            flex-direction: row;
            gap: 16px;
            height: 100%;
            padding: 10px;
            min-height: 0;
            overflow: hidden;
        }
        .map-left-v7 {
            flex: 1 1 auto;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-width: 0;
            overflow: hidden;
            gap: 12px;
        }
        .pressure-row-strict {
            display: flex;
            gap: 12px;
            height: 190px;
            flex-shrink: 0;
            align-items: flex-start;
        }
        .matrix-group-strict {
            flex: 1 1 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            min-width: 0;
        }
        .matrix-label-strict {
            font-size: 0.85rem;
            font-weight: 700;
            height: 18px;
            line-height: 18px;
            flex-shrink: 0;
        }
        .matrix-strict {
            display: grid;
            grid-template-columns: repeat(3, 56px);
            grid-template-rows: repeat(3, 56px);
            gap: 5px;
            flex-shrink: 0;
        }
        .cell {
            width: 56px;
            height: 56px;
            border-radius: 8px;
            background: #0b1220;
            border: 1px solid #1e293b;
            transition: background-color 0.2s, border-color 0.2s, box-shadow 0.2s;
        }
        .strain-row-strict {
            display: flex;
            gap: 12px;
            height: 110px;
            flex-shrink: 0;
            align-items: flex-end;
        }
        .strain-wrap-strict {
            flex: 1 1 0;
            display: flex;
            justify-content: center;
            gap: 10px;
            height: 110px;
            min-width: 0;
        }
        .strain-bar-box {
            width: 64px;
            height: 110px;
            position: relative;
            flex-shrink: 0;
            min-width: 56px;
        }
        .strain-bar-fill {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            border-radius: 8px;
            min-height: 8px;
            transition: height 0.25s ease;
            height: 8px;
            z-index: 1;
        }
        .strain-bar-text {
            position: absolute;
            top: 8px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            color: rgba(255,255,255,0.95);
            font-size: 0.78rem;
            font-weight: 600;
            pointer-events: none;
            text-shadow: 0 1px 3px rgba(0,0,0,0.9);
            white-space: nowrap;
            width: calc(100% - 8px);
            text-align: center;
            overflow: hidden;
            text-overflow: ellipsis;
            line-height: 1.1;
            padding: 1px 2px;
            border-radius: 4px;
            background: rgba(2, 6, 23, 0.28);
        }
        .thumb-proximal-fill { background: rgba(217, 119, 6, 0.75); border: 1px solid rgba(217, 119, 6, 0.95); }
        .thumb-distal-fill   { background: rgba(245, 158, 11, 0.75); border: 1px solid rgba(245, 158, 11, 0.95); }
        .index-proximal-fill { background: rgba(37, 99, 235, 0.75); border: 1px solid rgba(37, 99, 235, 0.95); }
        .index-distal-fill   { background: rgba(147, 197, 253, 0.75); border: 1px solid rgba(147, 197, 253, 0.95); }
        .middle-proximal-fill{ background: rgba(185, 28, 28, 0.75); border: 1px solid rgba(185, 28, 28, 0.95); }
        .middle-distal-fill  { background: rgba(252, 165, 165, 0.75); border: 1px solid rgba(252, 165, 165, 0.95); }

        .map-right-v7 {
            flex: 0 0 220px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            border-left: 1px solid #1e293b;
            padding-left: 16px;
            overflow: hidden;
            gap: 12px;
        }
        .imu-module-v7 {
            flex: 1 1 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 6px;
            min-height: 0;
        }
        .imu-title-v7 {
            font-size: 0.85rem;
            font-weight: 700;
            height: 20px;
            line-height: 20px;
            flex-shrink: 0;
            display: block;
            width: 100%;
            text-align: center;
        }
        .imu-bars-v7 {
            display: flex;
            gap: 5px;
            align-items: flex-start;
            /* 内层列: 标签14 + gap3 + 轨道60 + gap3 + 数值14 + 上下padding8 ≈ 102，留余量避免溢出盖住标题 */
            min-height: 108px;
            height: auto;
            padding: 6px 6px 4px;
            background: #060b14;
            border-radius: 6px;
            border: 1px solid #1e293b;
            flex-shrink: 0;
            overflow: hidden;
        }
        .imu-bar-item-v7 {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 3px;
            min-width: 0;
        }
        .imu-bar-label-v7 {
            font-size: 0.65rem;
            font-weight: 600;
            height: 14px;
            line-height: 14px;
            text-align: center;
            flex-shrink: 0;
        }
        .imu-bar-track-v7 {
            width: 100%;
            height: 60px;
            background: #0b1220;
            border-radius: 4px;
            position: relative;
            overflow: hidden;
            border: 1px solid #1e293b;
            flex-shrink: 0;
        }
        .imu-bar-fill-v7 {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            min-height: 2px;
            transition: height 0.25s ease;
            height: 2px;
        }
        .imu-bar-value-v7 {
            font-size: 0.62rem;
            font-family: 'Consolas', monospace;
            color: #e2e8f0;
            height: 14px;
            line-height: 14px;
            text-align: center;
            white-space: nowrap;
            flex-shrink: 0;
        }

        /* ==================== Zoom Modal ==================== */
        .modal-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0;
            width: 100vw; height: 100vh;
            background: rgba(5, 8, 16, 0.96);
            z-index: 1000;
            flex-direction: column;
            padding: 16px 20px 20px;
        }
        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 10px;
            flex-shrink: 0;
        }
        .modal-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: #38bdf8;
        }
        .modal-canvas {
            width: 100%;
            height: 55vh;
            max-height: 420px;
            min-height: 300px;
            background: #060b14;
            border-radius: 8px;
            border: 1px solid #1e293b;
            flex-shrink: 0;
        }
        .zoom-data-grid {
            display: grid;
            gap: 6px;
            margin-top: 10px;
            padding: 12px;
            background: #0b1220;
            border-radius: 6px;
            border: 1px solid #1e293b;
            flex-shrink: 0;
        }
        .zoom-data-grid.pressure { grid-template-columns: repeat(9, 1fr); }
        .zoom-data-grid.strain { grid-template-columns: repeat(2, 1fr); }
        .zoom-data-grid.imu { grid-template-columns: repeat(6, 1fr); }
        .zoom-data-cell {
            background: #060b14;
            border-radius: 4px;
            padding: 6px 10px;
            font-family: 'Consolas', monospace;
            font-size: 0.9rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border: 1px solid #1e293b;
        }
        .zoom-data-cell .z-label { font-size: 0.85rem; }
        .zoom-data-cell .z-value { color: #e2e8f0; font-weight: 600; font-size: 1rem; }

        /* 手部映射放大 */
        .hand-map-zoom-content {
            flex: 1;
            display: flex;
            flex-direction: row;
            gap: 30px;
            padding: 10px;
            overflow-y: auto;
            min-height: 0;
        }
        .hand-map-zoom-content .map-left-v7 {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            gap: 20px;
        }
        .hand-map-zoom-content .map-right-v7 {
            flex: 0 0 280px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            border-left: 1px solid #1e293b;
            padding-left: 30px;
            gap: 20px;
        }
        .hand-map-zoom-content .pressure-row-strict {
            gap: 30px;
            height: 280px;
        }
        .hand-map-zoom-content .matrix-group-strict {
            flex: 1;
        }
        .hand-map-zoom-content .matrix-strict {
            grid-template-columns: repeat(3, 90px);
            grid-template-rows: repeat(3, 90px);
            gap: 8px;
        }
        .hand-map-zoom-content .matrix-label-strict {
            font-size: 1.1rem;
            height: 24px;
            line-height: 24px;
        }
        .hand-map-zoom-content .cell {
            width: 90px;
            height: 90px;
        }
        .hand-map-zoom-content .strain-row-strict {
            gap: 30px;
            height: 160px;
        }
        .hand-map-zoom-content .strain-wrap-strict {
            height: 160px;
        }
        .hand-map-zoom-content .strain-bar-box {
            width: 100px;
            height: 160px;
        }
        .hand-map-zoom-content .strain-bar-text {
            font-size: 1rem;
            top: 10px;
            width: calc(100% - 12px);
        }
        .hand-map-zoom-content .imu-bars-v7 {
            min-height: 156px;
            height: auto;
            padding: 8px 10px 6px;
        }
        .hand-map-zoom-content .imu-bar-track-v7 {
            height: 100px;
        }
        .hand-map-zoom-content .imu-bar-label-v7 {
            font-size: 0.8rem;
            height: 18px;
            line-height: 18px;
        }
        .hand-map-zoom-content .imu-bar-value-v7 {
            font-size: 0.78rem;
            height: 18px;
            line-height: 18px;
        }

        /* Log panels */
        .log-container {
            flex: 1;
            overflow-y: auto;
            background: #060b14;
            border-radius: 6px;
            padding: 8px;
            font-family: 'Consolas', monospace;
            font-size: 0.78rem;
            line-height: 1.4;
        }
        .log-entry { margin-bottom: 2px; color: #cbd5e1; }
        .log-entry.data { color: #4ade80; }
        .log-entry.debug { color: #64748b; }
        .log-entry.error { color: #f87171; }
        .log-entry.warn { color: #fbbf24; }
        .timestamp { color: #334155; margin-right: 6px; }

        @media (max-width: 900px) {
            .container { grid-template-columns: 1fr; height: auto; }
            .row-pressure, .row-strain { grid-template-columns: 1fr; }
            .row-combined { grid-template-columns: 1fr; }
            .imu-column { flex-direction: row; }
            .row-logs { grid-template-columns: 1fr; }
            .duration-display { display: none; }
            .hand-map-content-v7 { flex-direction: column; }
            .map-right-v7 { flex: 0 0 auto; border-left: none; border-top: 1px solid #1e293b; padding-left: 0; padding-top: 16px; flex-direction: row; min-height: 200px; }
            .imu-module-v7 { flex-direction: column; }
        }