* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1e40af;
    --primary-hover: #1d4ed8;
    --secondary-color: #3b82f6;
    --accent-color: #60a5fa;
    --bg-dark: #1e293b;
    --bg-card: #334155;
    --bg-hover: #475569;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #475569;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background: var(--bg-dark);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: 8px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.header h1 {
    color: #fff;
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.main-tabs {
    display: flex;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border-color);
}

.tab {
    flex: 1;
    padding: 14px 16px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
}

.tab:hover {
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.1);
}

.tab.active {
    color: var(--accent-color);
    background: var(--bg-card);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20%;
    right: 20%;
    height: 2px;
    background: var(--accent-color);
    border-radius: 1px;
}

.panel {
    padding: 20px 24px;
}

.config-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
    padding: 16px;
    background: var(--bg-dark);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.config-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.config-row label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.config-row .range-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.config-row input[type="range"] {
    flex: 1;
    height: 4px;
    background: var(--bg-hover);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}

.config-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
}

.config-row input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.config-row select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 13px;
    color: var(--text-primary);
    background: var(--bg-hover);
    cursor: pointer;
    transition: border-color 0.2s;
}

.config-row select:hover {
    border-color: var(--accent-color);
}

.config-row select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.1);
}

.config-row span {
    min-width: 40px;
    text-align: center;
    font-weight: 600;
    color: var(--accent-color);
    font-size: 14px;
}

.button-group {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 20px;
}

.calculate-btn {
    padding: 10px 32px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 100px;
}

.calculate-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.calculate-btn:active {
    transform: translateY(0);
}

.export-btn {
    padding: 10px 32px;
    background: var(--bg-hover);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 100px;
}

.export-btn:hover {
    background: var(--border-color);
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

.export-btn:active {
    transform: translateY(0);
}

.result-tabs {
    display: flex;
    background: var(--bg-dark);
    border-radius: 4px 4px 0 0;
    overflow: hidden;
    margin-bottom: 0;
    border: 1px solid var(--border-color);
    border-bottom: none;
}

.result-tab {
    flex: 1;
    padding: 12px;
    text-align: center;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.result-tab:hover {
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.1);
}

.result-tab.active {
    background: var(--primary-color);
    color: #fff;
}

.result-panel {
    background: var(--bg-dark);
    border-radius: 0 0 4px 4px;
    overflow: auto;
    border: 1px solid var(--border-color);
    border-top: none;
}

.result-content {
    padding: 16px;
}

.result-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}

.result-table th,
.result-table td {
    padding: 10px 8px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.result-table th {
    background: var(--bg-hover);
    font-weight: 600;
    color: var(--text-primary);
}

.result-table th:first-child,
.result-table td:first-child {
    text-align: left;
    padding-left: 12px;
}

.result-table tbody tr:hover {
    background: rgba(96, 165, 250, 0.05);
}

.result-table td {
    color: var(--text-secondary);
}

.result-table .io-size {
    font-weight: 600;
    color: var(--accent-color);
}

.result-table .workload {
    padding-left: 20px;
}

.io-group {
    border-top: 2px solid var(--primary-color);
}

.io-group:first-child {
    border-top: none;
}

.explanation-content {
    max-width: 800px;
    margin: 0 auto;
}

.explanation-content h2 {
    color: var(--text-primary);
    font-size: 18px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.explanation-section {
    margin-bottom: 20px;
}

.explanation-section h3 {
    color: var(--accent-color);
    font-size: 15px;
    margin-bottom: 10px;
}

.explanation-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 13px;
}

.explanation-section ul {
    list-style: none;
    padding-left: 0;
}

.explanation-section li {
    color: var(--text-secondary);
    line-height: 1.8;
    padding-left: 16px;
    position: relative;
    font-size: 13px;
}

.explanation-section li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: 12px;
}

@media (max-width: 768px) {
    .config-section {
        grid-template-columns: 1fr;
    }

    .result-table {
        font-size: 11px;
    }

    .result-table th,
    .result-table td {
        padding: 6px 4px;
    }
}

/* 说明页面表格样式 */
.spec-table {
    margin-top: 10px;
}

.spec-table h4 {
    color: var(--text-primary);
    font-size: 14px;
    margin: 15px 0 10px 0;
    padding-left: 10px;
    border-left: 3px solid var(--accent-color);
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 15px;
    font-size: 12px;
}

.info-table th,
.info-table td {
    border: 1px solid var(--border-color);
    padding: 10px;
    text-align: left;
    vertical-align: top;
}

.info-table th {
    background: var(--primary-color);
    color: #fff;
    font-weight: 600;
    text-align: center;
    white-space: nowrap;
}

.info-table td:first-child {
    background: var(--bg-card);
    color: var(--text-primary);
    font-weight: 500;
    width: 100px;
    white-space: nowrap;
}

.info-table tbody tr:nth-child(even) {
    background: rgba(30, 64, 175, 0.1);
}

.info-table tbody tr:hover {
    background: rgba(96, 165, 250, 0.1);
}