.vdi-main {
    min-height: calc(100vh - 200px);
}

.vdi-hero {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: 5rem 2rem;
    text-align: center;
}

.vdi-hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.vdi-title {
    font-size: 3rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.vdi-subtitle {
    font-size: 1.3rem;
    color: #aaa;
    line-height: 1.6;
}

.vdi-section {
    padding: 4rem 2rem;
}

.vdi-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: #1a1a2e;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.vdi-overview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.overview-text p {
    font-size: 1.1rem;
    color: #555;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.overview-text p:last-child {
    margin-bottom: 0;
}

.image-placeholder-large {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #667eea;
    border: 2px solid #e0e0e0;
    gap: 1rem;
}

.image-placeholder-large span {
    font-size: 1.2rem;
    font-weight: 500;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: #fff;
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 1rem;
}

.feature-desc {
    font-size: 1rem;
    color: #666;
    line-height: 1.6;
}

.scenarios-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.scenario-item {
    display: flex;
    align-items: center;
    gap: 2rem;
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.scenario-item:hover {
    transform: translateX(10px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.scenario-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.scenario-content h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 0.5rem;
}

.scenario-content p {
    font-size: 1rem;
    color: #666;
    line-height: 1.6;
}

.specs-table {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.spec-row {
    display: grid;
    grid-template-columns: 200px 1fr;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.3s ease;
}

/* 三列表格布局 */
.specs-table.three-column .spec-row {
    grid-template-columns: 1fr 2fr 100px;
}

.specs-table.three-column .spec-value {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.specs-table.three-column .spec-label {
    white-space: nowrap;
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-row:hover {
    background: #f8f9fa;
}

.spec-label {
    font-weight: 600;
    color: #1a1a2e;
    font-size: 1.1rem;
}

.spec-value {
    color: #555;
    font-size: 1rem;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .vdi-title {
        font-size: 2rem;
    }

    .vdi-subtitle {
        font-size: 1rem;
    }

    .vdi-hero {
        padding: 3rem 1.5rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .vdi-overview {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .image-placeholder-large {
        height: 200px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .scenario-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .spec-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .spec-label {
        font-size: 1rem;
    }

    .spec-value {
        font-size: 0.95rem;
    }
}