/* 关于我们页面样式 */

/* 公司简介 */
.about-intro {
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 25px;
}

.about-text .lead {
    font-size: 18px;
    color: var(--accent-color);
    font-weight: 500;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-text p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 15px;
}

.about-image {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

.about-image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
}

/* 发展历程 */
.timeline-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    /* background: rgba(255, 255, 255, 0.2); */
}

.timeline-item {
    position: relative;
    padding: 30px 0;
    display: flex;
    align-items: center;
}

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

.timeline-year {
    width: 120px;
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-color);
}

.timeline-content {
    flex: 1;
    padding: 25px 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin: 0 30px;
}

.timeline-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-white);
    margin-bottom: 10px;
}

.timeline-content p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

/* 核心优势 */
.advantages-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.advantage-card {
    text-align: center;
    padding: 40px 30px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--text-white);
}

.advantage-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.advantage-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 研发中心 */
.centers-section {
    padding: 100px 0;
}

.centers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.center-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.center-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.center-image {
    height: 220px;
    overflow: hidden;
}

.center-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.center-card:hover .center-image img {
    transform: scale(1.1);
}

.center-info {
    padding: 30px;
}

.center-info h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.center-info p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 专利统计 */
.patents-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.patents-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
}

.patent-item {
    text-align: center;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.patent-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.patent-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.patent-label {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
}

/* 响应式 */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image img {
        height: 350px;
    }

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

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

    .patents-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: column !important;
        padding-left: 70px;
    }

    .timeline-year {
        position: absolute;
        left: 0;
        width: 60px;
        font-size: 18px;
    }

    .timeline-content {
        margin: 0;
    }

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

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

    .about-text h2 {
        font-size: 28px;
    }
}