/* ========== About Us 专属样式 ========== */
/* Banner 区块 */
.about-banner {
    position: relative;
    height: 40vh;
    min-height: 300px;
    display: flex;
    align-items: flex-end;
    color: #fff;
    background-color: #333;
}

.about-banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.about-banner-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.6);
}

.about-banner-container {
    position: relative;
    z-index: 1;
    padding: 40px 0;
}

.breadcrumb {
    font-size: 14px;
    margin-bottom: 15px;
    opacity: 0.9;
}

.breadcrumb a {
    color: #fff;
    text-decoration: none;
}

.breadcrumb span {
    font-weight: 500;
}

.about-banner-title {
    font-size: 48px;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: 15px;
    line-height: 1.2;
}

.about-banner-desc {
    font-size: 16px;
    max-width: 800px;
    line-height: 1.6;
}

/* Who We Are 区块 */
.who-we-are {
    padding: 80px 0;
    background-color: #fff;
}

.who-we-are-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.section-tag {
    font-size: 14px;
    font-weight: 600;
    color: #0052cc;
    text-transform: uppercase;
    margin-bottom: 10px;
    display: inline-block;
}

.section-heading {
    font-size: 32px;
    font-weight: 700;
    color: #333;
    margin-bottom: 25px;
    line-height: 1.3;
}

.who-we-are-text {
    font-size: 16px;
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
}

.img-full {
    width: 100%;
    height: auto;
}

.outline-btn {
    background-color: transparent;
    color: #0052cc;
    border: 1px solid #0052cc;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.outline-btn:hover {
    background-color: #0052cc;
    color: #fff;
}

/* 数据统计区块 */
.stats {
    padding: 60px 0;
    background-color: #f8f9fa;
}

.stats-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-card {
    padding: 20px 10px;
}

.stat-icon {
    font-size: 28px;
    color: #0052cc;
    margin-bottom: 15px;
}

.stat-number {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: #666;
    text-transform: capitalize;
}

/* 发展历程区块 */
.journey {
    padding: 80px 0;
    background-color: #fff;
}

.timeline {
    position: relative;
    margin-top: 40px;
    padding: 20px 0;
}

.timeline-line {
    position: absolute;
    top: ;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #e0e0e0;
    transform: translateY(-50%);
    z-index: 1;
}

.timeline-items {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.timeline-item {
    position: relative;
    text-align: center;
    padding-top: 40px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    width: 20px;
    height: 20px;
    background-color: #0052cc;
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

.timeline-year {
    font-size: 18px;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}

.timeline-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

/* 工厂区块 */
.factory {
    padding: 80px 0;
    background-color: #f8f9fa;
}

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

.factory-text {
    font-size: 16px;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.6;
}

.factory-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.gallery-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

/* 团队+CTA区块 */
.team-cta {
    padding: 80px 0;
    background-color: #fff;
}

.team-cta-container {
    display: grid;
    grid-template-columns: 3fr 1fr;
    gap: 40px;
}

.team-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.team-info {
    padding: 20px 0;
}

.team-text {
    font-size: 16px;
    color: #666;
    margin-bottom: 30px;
    line-height: 1.6;
}

.team-values {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.team-value-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.value-icon {
    font-size: 24px;
    color: #0052cc;
    width: 40px;
    text-align: center;
}

.value-title {
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

.value-subtitle {
    font-size: 14px;
    color: #666;
}

.cta-card {
    background-color: #0052cc;
    color: #fff;
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.cta-card-title {
    font-size: 24px;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 30px;
}

.solid-btn {
    background-color: #fff;
    color: #0052cc;
    border: none;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.solid-btn:hover {
    background-color: #f0f0f0;
}

/* 页脚补充样式 */
.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 2fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 30px;
}

.footer-brand {
    padding-right: 20px;
}

.footer-brand-text {
    font-size: 14px;
    color: #ccc;
    margin: 20px 0;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: #fff;
    font-size: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: #0052cc;
    border-color: #0052cc;
}

.footer-link-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    text-transform: uppercase;
}

.link-list {
    list-style: none;
}

.link-list li {
    margin-bottom: 10px;
}

.link-list a {
    color: #ccc;
    font-size: 14px;
    text-decoration: none;
    transition: color 0.3s ease;
}

.link-list a:hover {
    color: #0052cc;
}

.contact-list {
    list-style: none;
    color: #ccc;
    font-size: 14px;
    line-height: 1.8;
}

.contact-list li {
    margin-bottom: 10px;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.contact-list i {
    color: #0052cc;
    margin-top: 3px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    font-size: 14px;
    color: #ccc;
}

.footer-legal {
    font-size: 14px;
}

.footer-legal a {
    color: #ccc;
    text-decoration: none;
    margin: 0 5px;
}

.footer-legal a:hover {
    color: #0052cc;
}

/* ========== 响应式适配（About Us专属） ========== */
@media (max-width: 1200px) {
    .who-we-are-container {
        gap: 40px;
    }
    .factory-container {
        gap: 40px;
    }
    .timeline-items {
        gap: 10px;
    }
    .footer-top {
        grid-template-columns: 2fr 1fr 1fr;
        row-gap: 40px;
    }
    .applications-links, .footer-contact {
        grid-column: span 3;
        width: 50%;
    }
}

@media (max-width: 992px) {
    .about-banner-title {
        font-size: 36px;
    }
    .who-we-are-container {
        grid-template-columns: 1fr;
    }
    .who-we-are-img {
        margin-top: 40px;
    }
    .stats-container {
        grid-template-columns: repeat(3, 1fr);
        gap: 40px;
    }
    .stat-card:last-child {
        grid-column: span 3;
    }
    .timeline-items {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .timeline-line {
        display: none;
    }
    .timeline-item {
        padding-top: 0;
        text-align: left;
        border-left: 2px solid #e0e0e0;
        padding-left: 20px;
        position: relative;
    }
    .timeline-item::before {
        top: 0;
        left: -10px;
        transform: none;
    }
    .factory-container {
        grid-template-columns: 1fr;
    }
    .factory-gallery {
        grid-template-columns: repeat(2, 1fr);
        margin-top: 40px;
    }
    .team-cta-container {
        grid-template-columns: 1fr;
    }
    .cta-card {
        padding: 40px 30px;
        margin-top: 40px;
    }
}

@media (max-width: 768px) {
    .about-banner {
        height: 30vh;
        min-height: 250px;
    }
    .about-banner-title {
        font-size: 28px;
    }
    .section-heading {
        font-size: 24px;
    }
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
    }
    .stat-card:last-child {
        grid-column: span 2;
    }
    .team-content {
        grid-template-columns: 1fr;
    }
    .footer-top {
        grid-template-columns: 1fr;
    }
    .applications-links, .footer-contact {
        width: 100%;
        grid-column: span 1;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .stats-container {
        grid-template-columns: 1fr;
    }
    .stat-card, .stat-card:last-child {
        grid-column: span 1;
    }
    .factory-gallery {
        grid-template-columns: 1fr;
    }
    .cta-card-title {
        font-size: 20px;
    }
    .about-banner-desc {
        font-size: 14px;
    }
}