/* 页面标题banner */
.page-banner {
    height: 300px;
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), url('https://picsum.photos/1920/300') no-repeat center;
    background-size: cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 80px;
}

.banner-content h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.banner-content p {
    font-size: 24px;
    opacity: 0.9;
}

/* 通用容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.section-title h2 {
    font-size: 32px;
    color: #333;
    margin-bottom: 10px;
}

.section-title p {
    font-size: 16px;
    color: #666;
    text-transform: uppercase;
}

/* 公司简介 */
.company-intro {
    padding: 80px 0;
    background: #fff;
}

.intro-content {
    display: flex;
    gap: 60px;
    align-items: center;
}

.intro-text {
    flex: 1;
}

.intro-text p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.intro-image {
    flex: 0 0 50%;
}

.intro-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

/* 企业文化 */
.culture-section {
    padding: 80px 0;
    background: #fff;
}

.culture-grid {
    display: flex;
    flex-direction: column;
    gap: 60px;
}

.culture-item {
    background: var(--light-green);
    padding: 40px;
    border-radius: 12px;
}

.culture-item h3 {
    font-size: 28px;
    color: var(--dark-green);
    margin-bottom: 30px;
    position: relative;
    padding-left: 20px;
}

.culture-item h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: var(--primary-color);
}

.culture-item ul {
    list-style: none;
    display: grid;
    gap: 30px;
}

.mission ul, .values ul {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.culture-item h4 {
    font-size: 18px;
    color: #333;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.culture-item h4::before {
    content: '•';
    color: var(--primary-color);
    margin-right: 10px;
    font-size: 24px;
}

.culture-item p {
    color: #666;
    line-height: 1.8;
}

.vision p {
    font-size: 18px;
    line-height: 2;
    color: #333;
}

/* 发展历程 */
.history {
    padding: 80px 0;
    background: #fff;
}

.timeline {
    position: relative;
    padding: 60px 0;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-path {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    opacity: 0.3;
    top: 0;
}

.timeline-items {
    position: relative;
    z-index: 1;
}

.timeline-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 60px;
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item .time {
    flex: 0 0 100px;
    text-align: right;
    padding-right: 30px;
    font-size: 18px;
    color: var(--dark-green);
    font-weight: bold;
}

.timeline-item .content {
    flex: 1;
    padding-left: 30px;
    text-align: left;
}

.timeline-item .content p {
    color: #666;
    line-height: 1.6;
    font-size: 16px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid #fff;
    box-shadow: 0 0 0 3px var(--light-green);
}

/* 偶数项靠右显示 */
.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-item:nth-child(even) .time {
    text-align: left;
    padding-right: 0;
    padding-left: 30px;
}

.timeline-item:nth-child(even) .content {
    text-align: right;
    padding-left: 0;
    padding-right: 30px;
}

/* 响应式布局 */
@media screen and (max-width: 992px) {
    .timeline {
        padding: 40px 30px;
    }

    .timeline-item .time {
        flex: 0 0 80px;
    }
}

@media screen and (max-width: 768px) {
    .page-banner {
        height: 200px;
    }

    .banner-content h1 {
        font-size: 32px;
    }

    .banner-content p {
        font-size: 18px;
    }

    .section-title h2 {
        font-size: 28px;
    }

    .timeline {
        padding: 30px 20px;
    }

    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
        padding-left: 30px;
        margin-bottom: 40px;
    }

    /* 移动端取消偶数项靠右显示 */
    .timeline-item:nth-child(even) {
        flex-direction: column;
    }

    .timeline-item:nth-child(even) .time {
        text-align: left;
        padding-left: 0;
    }

    .timeline-item:nth-child(even) .content {
        text-align: left;
        padding-right: 0;
    }

    .timeline-path {
        left: 15px;
    }

    .timeline-item::before {
        left: 15px;
        width: 12px;
        height: 12px;
        border-width: 2px;
        box-shadow: 0 0 0 2px var(--light-green);
    }

    .timeline-item .time {
        padding-right: 0;
        margin-bottom: 10px;
        font-size: 16px;
        flex: none;
    }

    .timeline-item .content {
        padding-left: 0;
        width: 100%;
    }

    .timeline-item .content p {
        font-size: 14px;
        line-height: 1.5;
    }
}

@media screen and (max-width: 480px) {
    .timeline {
        padding: 20px 15px;
    }

    .timeline-item {
        padding-left: 25px;
        margin-bottom: 30px;
    }

    .timeline-path {
        width: 3px;
    }

    .timeline-item::before {
        width: 10px;
        height: 10px;
    }

    .timeline-item .time {
        font-size: 14px;
        margin-bottom: 8px;
    }
}

@media screen and (max-width: 576px) {
    .culture-grid {
        grid-template-columns: 1fr;
    }
}