/* ============================================================
   关于我们页样式 about.css
   ============================================================ */

:root {
    --primary: #F5222D;
    --primary-light: #ff4d4f;
    --primary-gradient: linear-gradient(135deg, #F5222D 0%, #ff7875 100%);
    --text-primary: #1a1a2e;
    --text-secondary: #6b7280;
}

body {
    background: #f5f5f7;
    min-height: 100vh;
}

/* ===== 主内容区 ===== */
.main-content {
    padding-top: 80px;
    min-height: 100vh;
}

/* ===== 内容区 ===== */
.about-main {
    padding: 60px 5%;
    max-width: 900px;
    margin: 0 auto;
}

.about-card {
    background: #fff;
    border-radius: 20px;
    padding: 48px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid rgba(0,0,0,0.04);
    margin-bottom: 32px;
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.about-card h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: 0 0 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid #f0f0f0;
    text-align: center;
}
.about-card p {
    color: #555;
    margin-bottom: 16px;
    line-height: 1.9;
    font-size: 15px;
}
.about-card p:last-child {
    margin-bottom: 0;
}

/* ===== 数据统计 ===== */
.about-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}
.about-stat {
    background: #fff;
    border-radius: 20px;
    padding: 32px 16px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid rgba(0,0,0,0.04);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.about-stat:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px -15px rgba(245, 34, 45, 0.2);
}
.about-stat-icon {
    width: 52px;
    height: 52px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, rgba(245,34,45,0.1) 0%, rgba(255,120,117,0.1) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}
.about-stat-icon svg {
    width: 26px;
    height: 26px;
}
.about-stat-value {
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 6px;
    background: linear-gradient(135deg, var(--text-primary) 0%, #4a5568 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.about-stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===== 核心优势 ===== */
.about-values {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 24px;
}
.about-value {
    text-align: center;
    padding: 28px 20px;
    background: #f8fafc;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}
.about-value:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -12px rgba(245, 34, 45, 0.2);
    border-color: #fecaca;
}
.about-value-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 14px;
    background: var(--primary-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 6px 16px rgba(245, 34, 45, 0.3);
}
.about-value-icon svg {
    width: 24px;
    height: 24px;
}
.about-value h3 {
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 700;
}
.about-value p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

/* ===== 发展历程 ===== */
.about-timeline {
    margin-top: 24px;
    position: relative;
    padding-left: 32px;
}
.about-timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--primary) 0%, #e2e8f0 100%);
    border-radius: 2px;
}
.timeline-item {
    position: relative;
    padding: 0 0 28px;
}
.timeline-item:last-child {
    padding-bottom: 0;
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: -28px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-gradient);
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px rgba(245, 34, 45, 0.3);
}
.timeline-year {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}
.timeline-item p {
    margin: 0;
}

/* ===== 底部 CTA ===== */
.about-cta {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 20px;
    padding: 48px;
    text-align: center;
    color: #fff;
    box-shadow: 0 20px 40px -20px rgba(0,0,0,0.3);
}
.about-cta h3 {
    font-size: 1.6rem;
    margin-bottom: 12px;
}
.about-cta p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 32px;
    font-size: 1.05rem;
}
.about-cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}
.cta-btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 8px 24px rgba(245, 34, 45, 0.4);
}
.cta-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(245, 34, 45, 0.5);
}
.cta-btn-outline {
    background: rgba(255,255,255,0.1);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.2);
}
.cta-btn-outline:hover {
    background: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.3);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .about-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-values {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    .about-main {
        padding: 40px 5%;
    }
    .about-card {
        padding: 24px;
    }
    .about-card h2 {
        font-size: 1.3rem;
    }
    .about-stats-grid {
        gap: 16px;
    }
    .about-cta {
        padding: 32px 24px;
    }
    .about-cta h3 {
        font-size: 1.3rem;
    }
}
@media (max-width: 480px) {
    .about-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .about-stat {
        padding: 20px 12px;
    }
    .about-stat-value {
        font-size: 1.4rem;
    }
    .about-values {
        grid-template-columns: 1fr;
    }
}