/* 关于我们页面专用样式 */

/* 页面标题 */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    margin-top: 70px;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.page-header p {
    font-size: 1.3rem;
    opacity: 0.9;
}

/* 公司介绍 */
.company-intro {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.intro-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.intro-text h2 {
    font-size: 2.5rem;
    margin-bottom: 30px;
    font-weight: 700;
}

.company-highlights {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.highlight-item {
    text-align: center;
    background: rgba(255,255,255,0.1);
    padding: 20px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    min-width: 120px;
}

.highlight-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #ffd700;
    margin-bottom: 5px;
}

.highlight-text {
    font-size: 0.9rem;
    opacity: 0.9;
}

.company-description {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 25px;
    font-weight: 500;
}

.company-mission {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 30px;
    opacity: 0.9;
    font-style: italic;
}

.company-values {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.value-item {
    background: rgba(255,255,255,0.1);
    padding: 20px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

.value-item h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: #ffd700;
}

.value-item p {
    font-size: 0.95rem;
    opacity: 0.9;
    margin: 0;
}

.company-logo {
    background: rgba(255,255,255,0.1);
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

.company-logo h3 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.company-logo p {
    opacity: 0.8;
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.logo-features {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.feature-tag {
    background: #ffd700;
    color: #333;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* 产品介绍 */
.product-intro {
    padding: 80px 0;
    background: #f8f9fa;
}

.product-description {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.product-description p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: #666;
    margin-bottom: 25px;
}

/* 核心优势 */
.core-advantages {
    padding: 80px 0;
    background: white;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: white;
    border: 2px solid #f0f0f0;
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.advantage-card:hover::before {
    transform: scaleX(1);
}

.advantage-card:hover {
    border-color: #2c5aa0;
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(44,90,160,0.2);
}

.advantage-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 1.5rem;
    color: #2c5aa0;
    margin-bottom: 15px;
}

.advantage-card p {
    color: #666;
    line-height: 1.8;
}

/* 服务模块 */
.service-modules {
    padding: 80px 0;
    background: #f8f9fa;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.module-card {
    background: white;
    border-radius: 12px;
    padding: 30px 25px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
}

.module-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    border-color: #2c5aa0;
}

.module-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.module-card h3 {
    font-size: 1.3rem;
    color: #2c5aa0;
    margin-bottom: 10px;
}

.module-card p {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 发展历程 */
.development-history {
    padding: 80px 0;
    background: white;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, #667eea, #764ba2);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 50px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-date {
    background: linear-gradient(135deg, #2c5aa0, #667eea);
    color: white;
    padding: 15px 25px;
    border-radius: 25px;
    font-weight: bold;
    font-size: 1.1rem;
    min-width: 120px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(44,90,160,0.3);
    position: relative;
    z-index: 2;
}

.timeline-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    border: 2px solid #f0f0f0;
    flex: 1;
    margin: 0 30px;
    transition: all 0.3s ease;
}

.timeline-content:hover {
    border-color: #2c5aa0;
    transform: scale(1.02);
}

.timeline-content h3 {
    color: #2c5aa0;
    font-size: 1.4rem;
    margin-bottom: 10px;
}

.timeline-content p {
    color: #666;
    line-height: 1.6;
}

/* 联系我们 */
.contact-us {
    padding: 80px 0;
    background: #f8f9fa;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.contact-card {
    background: white;
    border-radius: 15px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: 2px solid #f0f0f0;
}

.contact-card:hover {
    border-color: #2c5aa0;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(44,90,160,0.2);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.contact-card h3 {
    color: #2c5aa0;
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.contact-card p {
    color: #333;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.contact-card span {
    color: #666;
    font-size: 0.95rem;
}

.cta-section {
    text-align: center;
    background: linear-gradient(135deg, #2c5aa0 0%, #667eea 100%);
    color: white;
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(44,90,160,0.3);
}

.cta-section h3 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

/* 导航栏活跃状态 */
.nav-menu a.active {
    color: #2c5aa0;
}

.nav-menu a.active::after {
    width: 100%;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2.5rem;
    }

    .intro-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .intro-text h2 {
        font-size: 2rem;
        text-align: center;
    }

    .intro-text h2::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .company-highlights {
        justify-content: center;
        gap: 15px;
    }

    .highlight-item {
        min-width: 100px;
        padding: 15px;
    }

    .highlight-number {
        font-size: 1.5rem;
    }

    .company-description {
        font-size: 1.1rem;
    }

    .company-mission {
        font-size: 1rem;
    }

    .company-values {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .value-item {
        padding: 15px;
    }

    .advantages-grid,
    .modules-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: row !important;
        padding-left: 60px;
    }

    .timeline-date {
        position: absolute;
        left: -60px;
        min-width: 100px;
        font-size: 0.9rem;
        padding: 10px 15px;
    }

    .timeline-content {
        margin: 0;
    }

    .cta-section {
        padding: 40px 30px;
    }

    .cta-section h3 {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 100px 0 60px;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .company-intro,
    .product-intro,
    .core-advantages,
    .service-modules,
    .development-history,
    .contact-us {
        padding: 60px 0;
    }

    .intro-text h2 {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .advantage-card,
    .module-card,
    .contact-card {
        padding: 25px 20px;
    }

    .timeline-item {
        padding-left: 50px;
    }

    .timeline-date {
        left: -50px;
        min-width: 80px;
        font-size: 0.8rem;
        padding: 8px 12px;
    }

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