/* ========================================
   内页特有样式
   ======================================== */

/* 案例详情页样式 */
.case-detail {
    padding: 40px 60px 60px;
}

.case-intro {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    margin-bottom: 40px;
}

.case-preview {
    background: white;
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.preview-frame {
    width: 100%;
    height: 400px;
    border: none;
    border-radius: 12px;
    background: #f5f5f5;
}

.case-info-card {
    background: white;
    border-radius: var(--radius);
    padding: 36px;
    box-shadow: var(--shadow);
}

.case-info-card h1 {
    font-size: 32px;
    font-weight: 900;
    color: var(--text-main);
    margin-bottom: 16px;
}

.case-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}

.case-meta span {
    padding: 6px 16px;
    background: var(--bg-warm);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
}

.case-meta .highlight {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
}

.case-desc {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.case-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.case-stats .stat-item {
    text-align: center;
    padding: 20px;
    background: var(--bg-warm);
    border-radius: 12px;
}

.case-stats .stat-item .number {
    font-size: 28px;
    font-weight: 900;
    color: var(--primary);
}

.case-stats .stat-item .label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* 预览区块 */
.preview-section {
    background: white;
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.preview-header h2 {
    font-size: 20px;
    font-weight: 700;
}

.preview-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: #e8f5e9;
    border-radius: 20px;
    color: #4caf50;
    font-size: 13px;
    font-weight: 500;
}

.iframe-container {
    position: relative;
    width: 100%;
    height: 700px;
    border-radius: 12px;
    overflow: hidden;
    border: 3px solid #e0e0e0;
    background: #f5f5f5;
}

.iframe-container iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.iframe-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px;
}

.iframe-placeholder i {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.8;
}

.iframe-placeholder h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.iframe-placeholder p {
    font-size: 15px;
    opacity: 0.9;
    max-width: 500px;
}

.iframe-placeholder .btn {
    display: inline-block;
    margin-top: 24px;
    padding: 14px 32px;
    background: white;
    color: #667eea;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
}

/* 功能区块 */
.features-section {
    background: white;
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
}

.features-section h2 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--text-main);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.features-grid .feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: var(--bg-warm);
    border-radius: 12px;
}

.features-grid .feature-item i {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    flex-shrink: 0;
}

.features-grid .feature-item h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
}

.features-grid .feature-item p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 返回区块 */
.back-section {
    text-align: center;
    padding: 40px 60px 60px;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: white;
    border: 2px solid var(--primary);
    color: var(--primary);
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
}

.back-btn:hover {
    background: var(--primary);
    color: white;
}

/* 演示区块 */
.demo-section {
    padding: 80px 60px;
    background: var(--bg-warm);
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.demo-item {
    aspect-ratio: 16/10;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 14px;
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.demo-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow);
}

/* 功能区块通用 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-grid .feature-item {
    padding: 40px;
    background: var(--bg-warm);
    border-radius: var(--radius);
    transition: all 0.4s;
    text-align: center;
}

.feature-grid .feature-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.feature-grid .feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 32px;
    color: white;
}

.feature-grid .feature-item h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-grid .feature-item p {
    font-size: 15px;
    color: var(--text-secondary);
}

/* 内页响应式 */
@media (max-width: 1200px) {
    .case-intro {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 1024px) {
    .feature-grid,
    .demo-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .case-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .case-detail {
        padding: 30px 20px;
    }

    .preview-frame {
        height: 300px;
    }

    .iframe-container {
        height: 500px;
    }

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

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .demo-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .case-intro {
        gap: 24px;
    }

    .case-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .case-info-card h1 {
        font-size: 24px;
    }

    .case-info-card {
        padding: 24px;
    }

    .back-section {
        padding: 30px 20px;
    }

    .back-btn {
        padding: 12px 28px;
        font-size: 14px;
    }

    .demo-section {
        padding: 50px 20px;
    }
}

@media (max-width: 375px) {
    .case-info-card h1 {
        font-size: 20px;
    }

    .iframe-container {
        height: 350px;
    }

    .preview-section,
    .features-section {
        padding: 20px;
    }
}