/* ===== Hero 区域 ===== */
.about-hero {
    background: linear-gradient(135deg, #BFDBFE 0%, #0972fb 100%);
    padding: 6rem 0 5rem;
    position: relative;
    overflow: hidden;
}

.about-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.about-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-heading);
    line-height: 1.2;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* 让about-hero区域的内容居中 */
.about-hero .container .row > div {
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.about-subtitle {
    font-size: 1.25rem;
    color: var(--text-body);
    line-height: 1.8;
    margin-bottom: 2rem;
    max-width: 700px;
    text-align: center;
}

/* ===== 数据统计区域 ===== */
.stats-section {
    padding: 4rem 0;
    background: white;
    margin-top: -3rem;
    position: relative;
    z-index: 10;
}

.stats-card {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border-subtle);
    height: 100%;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-body);
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.stat-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ===== 关于我们区域 ===== */
.about-section {
    padding: 6rem 0;
    background: white;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 4rem;
    margin-top: 3rem;
}

.about-image {
    flex: 1;
    background: linear-gradient(135deg, var(--brand-gradient-start) 0%, var(--brand-gradient-end) 100%);
    border-radius: 20px;
    padding: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10rem;
    color: var(--brand-primary);
    opacity: 0.5;
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--text-body);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

/* ===== 核心价值观 ===== */
.values-section {
    padding: 6rem 0;
    background: var(--bg-soft);
}

.value-card {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    border: 1px solid var(--border-subtle);
    transition: all 0.3s ease;
    height: 100%;
}

.value-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
    border-color: rgba(37, 99, 235, 0.3);
}

.value-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

.value-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 0.75rem;
}

.value-desc {
    color: var(--text-body);
    line-height: 1.6;
}

/* ===== 团队区域 ===== */
.team-section {
    padding: 6rem 0;
    background: white;
}

.team-card {
    text-align: center;
    padding: 2rem;
    background: var(--bg-soft);
    border-radius: 16px;
    transition: all 0.3s ease;
    height: 100%;
}

.team-card:hover {
    background: white;
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
}

.team-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 3rem;
    color: white;
    font-weight: 700;
}

.team-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 0.25rem;
}

.team-role {
    color: var(--brand-primary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.team-desc {
    color: var(--text-body);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== 发展历程 ===== */
.timeline-section {
    padding: 6rem 0;
    background: var(--bg-soft);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 3rem auto 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
    transform: translateX(-50%);
    border-radius: 4px;
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    position: relative;
}

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

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

.timeline-content {
    flex: 1;
    background: white;
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-subtle);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 3rem;
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 3rem;
    text-align: left;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    width: 24px;
    height: 24px;
    background: var(--brand-primary);
    border-radius: 50%;
    transform: translateX(-50%);
    border: 4px solid white;
    box-shadow: 0 0 0 4px var(--brand-gradient-start);
}

.timeline-year {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--brand-primary);
    margin-bottom: 0.5rem;
}

.timeline-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 0.5rem;
}

.timeline-desc {
    color: var(--text-body);
    line-height: 1.6;
}

/* ===== 合作伙伴 ===== */
.partners-section {
    padding: 6rem 0;
    background: white;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.partner-logo {
    background: var(--bg-soft);
    border-radius: 12px;
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.partner-logo:hover {
    background: white;
    color: var(--brand-primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
    .about-title {
        font-size: 2.5rem;
    }

    .about-content {
        flex-direction: column;
    }

    .about-image, .about-text {
        flex: none;
        width: 100%;
    }

    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: row !important;
        padding-left: 80px;
    }

    .timeline-content {
        margin: 0 0 0 2rem !important;
        text-align: left !important;
    }

    .timeline-dot {
        left: 30px;
    }
}

@media (max-width: 767.98px) {
    .about-hero {
        padding: 4rem 0 3rem;
    }

    .about-title {
        font-size: 2rem;
    }

    .stats-section {
        margin-top: 2rem;
    }
}