/* ========================================
   关于我们页样式
   商务风格 · 专业设计
   ======================================== */

/* ========== 页面标题 ========== */
.page-header {
    background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 50%, #0F172A 100%);
    color: white;
    text-align: center;
    padding: 140px 20px 80px;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(52, 211, 153, 0.1) 0%, transparent 50%);
}

.page-header h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #60A5FA 0%, #34D399 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.page-header p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    position: relative;
}

/* ========== Section 标题样式 ========== */
.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(59, 130, 246, 0.1));
    border-radius: 20px;
    color: #2563EB;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: #0F172A;
    margin-bottom: 12px;
}

.section-title p {
    font-size: 16px;
    color: #64748B;
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text h2 {
    font-size: 36px;
    color: #0F172A;
    margin-bottom: 24px;
}

.about-text p {
    color: #64748B;
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-image {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 亮点卡片 */
.intro-highlights {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 32px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: #F8FAFC;
    border-radius: 16px;
    border: 1px solid #E2E8F0;
    transition: all 0.3s ease;
}

.highlight-item:hover {
    background: white;
    border-color: #3B82F6;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transform: translateX(8px);
}

.highlight-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    background: linear-gradient(135deg, #2563EB, #3B82F6);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.highlight-icon svg {
    width: 24px;
    height: 24px;
    stroke: white;
}

.highlight-text h4 {
    font-size: 16px;
    font-weight: 600;
    color: #0F172A;
    margin-bottom: 4px;
}

.highlight-text p {
    font-size: 14px;
    color: #64748B;
    margin-bottom: 0;
}

/* ========== 发展历程 ========== */
.timeline-section {
    padding: 100px 0;
    background: #F8FAFC;
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, #3B82F6, #10B981);
}

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

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

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

.timeline-content {
    width: 45%;
    background: white;
    padding: 28px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    border: 1px solid #E2E8F0;
    transition: all 0.3s ease;
}

.timeline-item:hover .timeline-content {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.timeline-item:nth-child(odd) .timeline-content {
    text-align: right;
}

.timeline-year {
    display: inline-block;
    background: linear-gradient(135deg, #2563EB, #3B82F6);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
}

.timeline-content h3 {
    font-size: 20px;
    color: #0F172A;
    margin-bottom: 10px;
    font-weight: 600;
}

.timeline-content p {
    font-size: 14px;
    color: #64748B;
    line-height: 1.7;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 18px;
    height: 18px;
    background: white;
    border: 4px solid #3B82F6;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.timeline-item:hover .timeline-dot {
    background: #3B82F6;
    box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.2);
}

/* ========== 核心优势 ========== */
.advantages-section {
    padding: 100px 0;
    background: white;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.advantage-card {
    text-align: center;
    padding: 40px 28px;
    background: #F8FAFC;
    border-radius: 20px;
    border: 1px solid #E2E8F0;
    transition: all 0.3s ease;
}

.advantage-card:hover {
    background: white;
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: #3B82F6;
}

.advantage-card .icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, #2563EB, #3B82F6);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    transition: all 0.3s ease;
}

.advantage-card:hover .icon {
    transform: scale(1.1);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
}

.advantage-card h3 {
    font-size: 20px;
    color: #0F172A;
    margin-bottom: 12px;
    font-weight: 600;
}

.advantage-card p {
    font-size: 14px;
    color: #64748B;
    line-height: 1.7;
}

/* ========== 响应式 ========== */
@media (max-width: 1200px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .about-image {
        max-width: 600px;
        margin: 0 auto;
    }
}

@media (max-width: 992px) {
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 120px 20px 60px;
    }

    .page-header h1 {
        font-size: 36px;
    }

    .page-header p {
        font-size: 16px;
    }

    .about-intro,
    .timeline-section,
    .advantages-section {
        padding: 60px 0;
    }

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

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

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

    .timeline-content,
    .timeline-item:nth-child(odd) .timeline-content {
        width: calc(100% - 60px);
        margin-left: 50px;
        text-align: left;
    }

    .timeline-dot {
        left: 20px;
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-logo {
        justify-content: center;
    }

    .footer-contact li {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .highlight-item {
        flex-direction: column;
        text-align: center;
    }

    .highlight-icon {
        margin: 0 auto;
    }
}