/* 关于我们页面特定样式 */
:root {
    --primary-color: #00649a;
    --secondary-color: #3498db;
    --accent-color: #2c3e50;
    --text-color: #333;
    --light-gray: #f9f9f9;
    --border-radius: 10px;
    --transition: 0.4s ease;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* 页面横幅 */
.page-banner {
    position: relative;
    width: 100%;
    height: 400px;
    overflow: hidden;
    margin-bottom: 60px;
}

.page-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.page-banner::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.1));
}

.banner-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    text-align: center;
    z-index: 1;
    max-width: 800px;
    width: 90%;
}

.banner-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    animation: fadeInDown 1s ease;
}

.banner-content p {
    font-size: 1.4rem;
    line-height: 1.6;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.3s both;
}

/* 主要内容区域 */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 80px;
}

/* 标题样式 */
.section-title {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.section-title h2 {
    color: var(--primary-color);
    font-size: 2.8rem;
    margin-bottom: 15px;
    display: inline-block;
    position: relative;
    padding-bottom: 15px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--secondary-color);
    border-radius: 2px;
}

.section-title p {
    color: #666;
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* 公司介绍卡片 */
.intro-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow);
    margin-bottom: 60px;
    position: relative;
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}

.intro-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.intro-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

.intro-card p {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 20px;
}

.intro-card p:last-child {
    margin-bottom: 0;
}

/* 数据统计 */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin: 60px 0;
}

.stat-item {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 1px solid #f0f0f0;
}

.stat-item:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-hover);
}

.stat-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
    margin-bottom: 5px;
    line-height: 1;
}

.stat-label {
    color: #666;
    font-size: 1.1rem;
}

/* 时间线 */
.timeline-section {
    position: relative;
    padding: 40px 0;
    margin: 60px 0;
}

.timeline-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    width: 45%;
}

.timeline-item:nth-child(odd) {
    left: 0;
}

.timeline-item:nth-child(even) {
    left: 55%;
}

.timeline-content {
    background: white;
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 20px;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
}

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -60px;
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -60px;
}

.timeline-year {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.timeline-title {
    font-size: 1.3rem;
    color: var(--accent-color);
    margin-bottom: 10px;
}

/* 图片展示区 */
.image-showcase {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin: 60px 0;
}

.showcase-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    height: 300px;
    transition: transform var(--transition);
}

.showcase-item:hover {
    transform: scale(1.03);
}

.showcase-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.showcase-item:hover img {
    transform: scale(1.1);
}

.showcase-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.showcase-item:hover .showcase-caption {
    transform: translateY(0);
}

/* 核心优势 */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin: 60px 0;
}

.advantage-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border-top: 4px solid var(--primary-color);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition);
}

.advantage-card:hover::before {
    opacity: 0.1;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.advantage-icon {
    font-size: 2.8rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.advantage-card h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
}

.advantage-card p {
    color: var(--text-color);
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .timeline-section::before {
        left: 30px;
    }

    .timeline-item {
        width: calc(100% - 80px);
        left: 80px !important;
    }

    .timeline-item:nth-child(odd) .timeline-content::before,
    .timeline-item:nth-child(even) .timeline-content::before {
        left: -50px;
    }
}

@media (max-width: 768px) {
    .page-banner {
        height: 300px;
    }

    .banner-content h1 {
        font-size: 2.5rem;
    }

    .banner-content p {
        font-size: 1.2rem;
    }

    .main-container {
        padding: 0 15px 40px;
    }

    .section-title h2 {
        font-size: 2.2rem;
    }

    .intro-card {
        padding: 25px;
    }

    .stats-section {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .image-showcase {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .advantage-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .page-banner {
        height: 250px;
    }

    .banner-content h1 {
        font-size: 2rem;
    }

    .banner-content p {
        font-size: 1rem;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }

    .stats-section {
        grid-template-columns: 1fr;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

/* 动画效果 */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-element {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-element.visible {
    opacity: 1;
    transform: translateY(0);
}