/* ===========================================
   VTS 智能仿真平台 - 关于我们页专用样式
   包含：发展历程、平台介绍、时间线等
   =========================================== */

/* ===========================================
   发展历程样式
   =========================================== */
.about-history {
    padding: 100px 0;
    background: #ffffff;
}

.history-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.history-text h2 {
    font-size: 2.5rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 2rem;
}

.history-description {
    font-size: 1.1rem;
    color: #7f8c8d;
    line-height: 1.8;
    margin-bottom: 3rem;
}

.about-img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.about-img:hover {
    transform: scale(1.02);
}

/* ===========================================
   时间线样式
   =========================================== */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, #3498db, #2980b9);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -1.5rem;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    background: #3498db;
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 3px #3498db;
}

.timeline-year {
    font-size: 1.2rem;
    font-weight: 600;
    color: #3498db;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: #7f8c8d;
    line-height: 1.6;
}

/* ===========================================
   平台介绍样式
   =========================================== */
.platform-intro {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e3f2fd 100%);
}

.intro-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.intro-text h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 1rem;
    margin-top: 2rem;
}

.intro-text h3:first-child {
    margin-top: 0;
}

.intro-text p {
    color: #7f8c8d;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

/* ===========================================
   特色功能高亮样式
   =========================================== */
.intro-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature-highlight {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.feature-highlight:hover {
    transform: translateX(10px);
    box-shadow: 0 10px 25px rgba(52, 152, 219, 0.15);
}

.highlight-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.highlight-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.highlight-content p {
    color: #7f8c8d;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

/* 图标样式 */
.icon-innovation::before { content: '💡'; font-size: 20px; }
.icon-quality::before { content: '⭐'; font-size: 20px; }
.icon-support::before { content: '🛠️'; font-size: 20px; }
.icon-future::before { content: '🚀'; font-size: 20px; }

/* ===========================================
   移动端响应式优化
   =========================================== */
@media (max-width: 768px) {
    .about-history {
        padding: 60px 0;
    }
    
    .history-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .history-text h2 {
        font-size: 2rem;
        line-height: 1.3;
    }
    
    .history-description {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .platform-intro {
        padding: 60px 0;
    }
    
    .intro-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .intro-text h3 {
        font-size: 1.3rem;
        margin-top: 1.5rem;
    }
    
    .feature-highlight {
        padding: 1rem;
    }
    
    .feature-highlight:hover {
        transform: translateY(-5px);
    }
    
    .highlight-icon {
        width: 40px;
        height: 40px;
    }
}

/* 小屏幕优化 */
@media (max-width: 480px) {
    .history-text h2 {
        font-size: 1.8rem;
    }
    
    .intro-text h3 {
        font-size: 1.2rem;
    }
    
    .timeline {
        padding-left: 1.5rem;
    }
    
    .timeline-item {
        padding-left: 1.5rem;
    }
}

/* ===========================================
   媒体报道样式 - 重新设计
   =========================================== */
.media-coverage {
    padding: 100px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    margin-top: 1rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.media-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.media-item {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
}

.media-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.media-item.featured {
    grid-row: span 2;
}

.media-image,
.media-video {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.media-item.featured .media-image {
    height: 300px;
}

.media-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.media-item:hover .media-img {
    transform: scale(1.05);
}

.media-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.video-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #2c3e50, #34495e);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    position: relative;
    cursor: pointer;
}

.play-button {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.video-placeholder:hover .play-button {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.video-duration {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
}

.media-info {
    padding: 1.5rem;
}

.media-category {
    display: inline-block;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 0.8rem;
}

.media-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.8rem;
    line-height: 1.3;
}

.media-info p {
    color: #666;
    line-height: 1.6;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.media-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #eee;
    font-size: 0.85rem;
    color: #999;
}


/* ===========================================
   联系我们样式 
   =========================================== */
.contact-info-section {
    padding: 100px 0;
    background: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.contact-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    border: 2px solid transparent;
    position: relative;
}

.contact-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.contact-card.highlight {
    border-color: #3498db;
    background: linear-gradient(135deg, #f8f9fa, #ffffff);
}

.contact-card.highlight::before {
    content: '推荐';
    position: absolute;
    top: -10px;
    right: 20px;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.contact-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.contact-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 1.5rem;
}

.contact-details p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.contact-note {
    font-size: 0.9rem;
    color: #999 !important;
    font-style: italic;
    margin-top: 1rem !important;
}

.partner-list {
    text-align: left;
}

.partner-item {
    display: flex;
    flex-direction: column;
    margin-bottom: 1rem;
    padding: 0.8rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.partner-item strong {
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.partner-item span {
    color: #666;
    font-size: 0.9rem;
}

/* 微信联系样式 - 重写 */
.wechat-contact {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.wechat-item {
    text-align: center;
    width: 100%;
}

.wechat-item p {
    margin: 0.5rem 0;
    font-weight: 500;
    color: #2c3e50;
}

.wechat-qr {
    margin-top: 1rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f8f9fa, #ffffff);
    border-radius: 12px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    /* 确保始终显示 */
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    position: static !important;
}

.wechat-qr:hover {
    border-color: #3498db;
    box-shadow: 0 8px 24px rgba(52, 152, 219, 0.15);
    transform: translateY(-2px) !important;
}

.qr-image {
    width: 120px;
    height: 120px;
    display: block;
    margin: 0 auto;
    border-radius: 8px;
    border: 1px solid #e9ecef;
}

.qr-tip {
    font-size: 0.85rem;
    color: #666;
    margin-top: 1rem;
    font-weight: 500;
    line-height: 1.4;
}

/* 移除所有可能的悬停隐藏效果 */
.contact-card .wechat-contact {
    padding: 0;
}

.contact-card .wechat-item {
    margin: 0;
}

/* 确保微信联系卡片的特殊样式 */
.contact-card.highlight .wechat-contact {
    padding: 1rem 0;
}

.contact-card.highlight .contact-details {
    text-align: center;
}

.contact-card .wechat-item h4 {
    font-size: 1.1rem;
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.contact-card .wechat-item p {
    color: #666;
    margin: 0.3rem 0;
}

.qr-tip {
    font-size: 0.8rem;
    color: #999;
    margin-top: 0.5rem;
}

/* 联系表单样式 */
.contact-form-section {
    margin-top: 4rem;
    padding: 3rem 0;
    background: linear-gradient(135deg, #f8f9fa, #ffffff);
    border-radius: 16px;
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.form-container h3 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.form-container > p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 2rem;
}

.contact-form {
    text-align: left;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.btn-large {
    width: 100%;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    margin-top: 1rem;
}

/* 移动端响应式优化 */
@media (max-width: 768px) {
    .media-coverage,
    .contact-info-section {
        padding: 60px 0;
    }
    
    .media-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .media-item.featured {
        grid-row: span 1;
    }
    
    .media-image,
    .media-video {
        height: 180px;
    }
    
    .media-item.featured .media-image {
        height: 200px;
    }
    
    .media-info {
        padding: 1.2rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .contact-card {
        padding: 2rem 1.5rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form-section {
        padding: 2rem 1rem;
    }
}