/* About Page Specific Styles */

/* Hero Section with Background Image */
.about-hero {
    background: linear-gradient(rgba(10, 44, 94, 0.8), rgba(10, 44, 94, 0.9)), url('../images/导航背景-关于我们.jpg');
    background-size: cover;
    background-position: center;
    padding: 180px 0 100px;
    color: white;
    text-align: center;
}

/* Page Navigation */
.page-nav {
    background-color: #f5f7fa;
    padding: 20px 0;
    border-bottom: 1px solid #eaeaea;
}

.page-nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
}

.page-nav-links a {
    color: #0a2c5e;
    text-decoration: none;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 5px;
    transition: all 0.3s;
}

.page-nav-links a:hover {
    background-color: #4dabf7;
    color: white;
}

/* Content Section */
.content-section {
    padding: 100px 0;
    background-color: #ffffff;
}

/* 浅色背景 - 用于交替背景 */
.content-section.bg-light {
    background-color: #f0f8ff !important;
}

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

.content-grid.single-column {
    grid-template-columns: 1fr;
}

.content-grid.reverse {
    direction: rtl;
}

.content-grid.reverse > * {
    direction: ltr;
}

.content-text {
    padding: 20px;
}

.content-text.full-width {
    grid-column: 1 / -1;
}

.content-text h3 {
    color: #0a2c5e;
    font-size: 28px;
    margin-bottom: 20px;
}

.content-text p {
    color: #555;
    line-height: 1.8;
    margin-bottom: 20px;
    font-size: 17px;
}

.company-building-img {
    width: 100%;
    max-width: 1000px;
    height: auto;
    display: block;
    margin: 30px auto;
    border-radius: 10px;
}

.content-image {
    text-align: center;
}

.content-img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    display: block;
}

.image-placeholder {
    background-color: #e6f2ff;
    border-radius: 10px;
    padding: 60px 30px;
    height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #0a2c5e;
}

.image-placeholder i {
    font-size: 100px;
    margin-bottom: 20px;
    color: #4dabf7;
}

.image-placeholder p {
    font-size: 18px;
    font-weight: 600;
}

/* Stats Container */
.stats-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    margin-top: 40px;
    border: 1px solid #e0e7ff;
}

.stat-item {
    text-align: center;
    padding: 20px;
    border-right: 1px solid #e0e7ff;
}

.stat-item:last-child {
    border-right: none;
}

.stat-item i {
    font-size: 28px;
    color: #4dabf7;
    margin-bottom: 12px;
}

.stat-item h3 {
    color: #0a2c5e;
    font-size: 36px;
    margin-bottom: 8px;
    font-weight: 600;
}

.stat-item p {
    color: #666;
    font-weight: 400;
    font-size: 16px;
}

/* Lists */
.culture-list, .rd-list {
    list-style-type: none;
    margin-top: 20px;
}

.culture-list li, .rd-list li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
}

.culture-list li:before, .rd-list li:before {
    content: "✓";
    color: #4dabf7;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* Vertical Timeline Container */
.vertical-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 0;
}

.vertical-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, #4dabf7, #0a2c5e);
    transform: translateX(-50%);
    border-radius: 2px;
}

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

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

.vertical-timeline-dot {
    position: absolute;
    left: 50%;
    width: 20px;
    height: 20px;
    background-color: #4dabf7;
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transform: translateX(-50%);
    z-index: 2;
}

.vertical-timeline-content {
    padding: 25px 30px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    position: relative;
    flex: 1;
}

/* 奇数项在左侧 */
.vertical-timeline-item:nth-child(odd) .vertical-timeline-content {
    margin-right: calc(50% + 30px);
    text-align: right;
}

/* 偶数项在右侧 */
.vertical-timeline-item:nth-child(even) .vertical-timeline-content {
    margin-left: calc(50% + 30px);
    text-align: left;
}

.vertical-timeline-content h3 {
    color: #0a2c5e;
    margin-bottom: 10px;
    font-size: 18px;
}

.vertical-timeline-content p {
    color: #666;
    line-height: 1.6;
    font-size: 14px;
}

/* Production Features */
.production-features {
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-item {
    background-color: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border-left: 4px solid #4dabf7;
}

.feature-item h4 {
    color: #0a2c5e;
    margin-bottom: 15px;
    font-size: 20px;
    display: flex;
    align-items: center;
}

.feature-item h4 i {
    margin-right: 10px;
    color: #4dabf7;
}

.feature-img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 20px;
    display: block;
    object-fit: cover;
}

.feature-item p {
    color: #666;
    line-height: 1.7;
}

/* Responsive Styles for About Page */
@media (max-width: 992px) {
    .content-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .content-grid.reverse {
        direction: ltr;
    }

    .production-features {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .stats-container {
        grid-template-columns: repeat(4, 1fr);
        gap: 0;
    }

    .stat-item {
        padding: 15px 8px;
    }

    .stat-item i {
        font-size: 24px;
    }

    .stat-item h3 {
        font-size: 30px;
    }

    .stat-item p {
        font-size: 14px;
    }

    .vertical-timeline::before {
        left: 20px;
    }

    .vertical-timeline-dot {
        left: 20px;
    }

    .vertical-timeline-item {
        flex-direction: column;
    }

    .vertical-timeline-item:nth-child(odd) .vertical-timeline-content,
    .vertical-timeline-item:nth-child(even) .vertical-timeline-content {
        margin-left: 60px;
        margin-right: 0;
        text-align: left;
    }

    .vertical-timeline-content h3 {
        font-size: 16px;
    }

    .vertical-timeline-content p {
        font-size: 13px;
    }
}

@media (max-width: 768px) {
    .page-nav-links {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

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

    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 0;
    }

    .stat-item {
        padding: 12px 5px;
    }

    .stat-item i {
        font-size: 22px;
    }

    .stat-item h3 {
        font-size: 26px;
    }

    .stat-item p {
        font-size: 13px;
    }

    .vertical-timeline {
        padding: 30px 0;
    }

    .vertical-timeline::before {
        left: 15px;
    }

    .vertical-timeline-dot {
        left: 15px;
        width: 16px;
        height: 16px;
        border-width: 3px;
    }

    .vertical-timeline-item {
        margin-bottom: 40px;
    }

    .vertical-timeline-content {
        padding: 20px 20px;
    }
}

@media (max-width: 576px) {
    .content-section {
        padding: 70px 0;
    }

    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .stat-item {
        padding: 10px 5px;
    }

    .stat-item i {
        font-size: 18px;
        margin-bottom: 6px;
    }

    .stat-item h3 {
        font-size: 22px;
        margin-bottom: 5px;
    }

    .stat-item p {
        font-size: 12px;
    }

    .vertical-timeline::before {
        left: 12px;
    }

    .vertical-timeline-dot {
        left: 12px;
        width: 14px;
        height: 14px;
        border-width: 3px;
    }

    .vertical-timeline-content {
        padding: 18px 15px;
    }

    .vertical-timeline-content h3 {
        font-size: 15px;
    }

    .vertical-timeline-content p {
        font-size: 12px;
    }
}