/* ==========================================
   关于我们页面样式
   ========================================== */

/* 英雄区域 */
.vm-about-hero {
    position: relative;
    padding: 120px 0 100px;
    overflow: hidden;
    background: linear-gradient(135deg, #FF6A00 0%, #FF8533 100%);
    text-align: center;
}

.vm-about-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    z-index: 0;
}

.vm-about-hero .container {
    position: relative;
    z-index: 1;
}

.vm-about-hero-content {
    max-width: 900px;
    margin: 0 auto;
    opacity: 0;
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
}

.vm-about-hero-title {
    font-size: 56px;
    font-weight: 800;
    color: white;
    margin-bottom: 20px;
    line-height: 1.2;
}

.vm-about-hero-subtitle {
    font-size: 22px;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 50px;
    line-height: 1.6;
}

.vm-about-hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.hero-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.hero-stat .stat-number {
    font-size: 48px;
    font-weight: 800;
    color: white;
    line-height: 1;
}

.hero-stat .stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
}

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

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

.vm-about-intro-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.vm-about-intro-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.vm-about-intro-image:hover img {
    transform: scale(1.05);
}

.intro-badge {
    position: absolute;
    bottom: 30px;
    left: 30px;
    background: white;
    padding: 20px 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
}

.intro-badge .badge-icon {
    font-size: 32px;
}

.intro-badge .badge-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
}

.vm-about-intro-content .vm-section-header {
    text-align: left;
    margin-bottom: 30px;
}

.vm-about-advantages .vm-section-header,
.vm-about-timeline .vm-section-header,
.vm-about-values .vm-section-header {
    margin-bottom: 60px;
}

.vm-about-intro-text p {
    font-size: 16px;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

.vm-about-intro-text p:last-child {
    margin-bottom: 0;
}

.vm-about-intro-features {
    display: flex;
    gap: 30px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.intro-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
}

.intro-feature .feature-icon {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

/* 我们的优势 */
.vm-about-advantages {
    padding: 100px 0;
    background: var(--bg-light);
}

.vm-advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-card {
    background: white;
    padding: 40px 35px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.advantage-icon {
    font-size: 56px;
    margin-bottom: 20px;
}

.advantage-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.advantage-desc {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* 发展历程 */
.vm-about-timeline {
    padding: 100px 0;
    background: white;
}

.vm-timeline {
    max-width: 900px;
    margin: 60px auto 0;
    position: relative;
}

.vm-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    transform: translateX(-50%);
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
    position: relative;
}

.timeline-item:nth-child(even) {
    direction: rtl;
}

.timeline-item:nth-child(even) > * {
    direction: ltr;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border: 4px solid white;
    border-radius: 50%;
    transform: translateX(-50%);
    box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.2);
    z-index: 2;
}

.timeline-year {
    text-align: right;
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    padding-right: 40px;
}

.timeline-item:nth-child(even) .timeline-year {
    text-align: left;
    padding-right: 0;
    padding-left: 40px;
}

.timeline-content {
    padding-left: 40px;
}

.timeline-item:nth-child(even) .timeline-content {
    padding-left: 0;
    padding-right: 40px;
}

.timeline-content h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.timeline-content p {
    font-size: 15px;
    color: var(--text-gray);
    line-height: 1.7;
}

/* 核心价值观 */
.vm-about-values {
    padding: 100px 0;
    background: var(--bg-light);
}

.vm-values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.value-card {
    background: white;
    padding: 50px 30px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.value-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: var(--transition);
}

.value-card:hover::before {
    transform: scaleX(1);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.value-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.value-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.value-card p {
    font-size: 14px;
    color: var(--text-gray);
    line-height: 1.6;
}

/* CTA区域 */
.vm-about-cta {
    padding: 100px 0;
    background: linear-gradient(135deg, #FF6A00 0%, #FF8533 100%);
    position: relative;
    overflow: hidden;
}

.vm-about-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.vm-cta-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.vm-cta-content h2 {
    font-size: 42px;
    font-weight: 800;
    color: white;
    margin-bottom: 20px;
}

.vm-cta-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 40px;
    line-height: 1.6;
}

.vm-cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.vm-btn-large {
    padding: 18px 48px;
    font-size: 18px;
}

.vm-about-cta .vm-btn-secondary {
    background: white;
    color: var(--primary-color);
    border: none;
}

.vm-about-cta .vm-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-3px);
}

/* ==========================================
   响应式设计
   ========================================== */

@media (max-width: 1024px) {
    .vm-about-intro-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .vm-advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .vm-values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .vm-timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        grid-template-columns: 1fr;
        gap: 20px;
        padding-left: 80px;
    }
    
    .timeline-item:nth-child(even) {
        direction: ltr;
    }
    
    .timeline-item::before {
        left: 30px;
    }
    
    .timeline-year {
        text-align: left;
        padding-right: 0;
        font-size: 36px;
    }
    
    .timeline-item:nth-child(even) .timeline-year {
        text-align: left;
        padding-left: 0;
    }
    
    .timeline-content {
        padding-left: 0;
    }
    
    .timeline-item:nth-child(even) .timeline-content {
        padding-right: 0;
    }
}

@media (max-width: 768px) {
    .vm-about-hero {
        padding: 80px 0 60px;
    }
    
    .vm-about-hero-title {
        font-size: 36px;
    }
    
    .vm-about-hero-subtitle {
        font-size: 18px;
    }
    
    .vm-about-hero-stats {
        gap: 40px;
    }
    
    .hero-stat .stat-number {
        font-size: 36px;
    }
    
    .vm-about-intro,
    .vm-about-advantages,
    .vm-about-timeline,
    .vm-about-values,
    .vm-about-cta {
        padding: 60px 0;
    }
    
    .vm-advantages-grid,
    .vm-values-grid {
        grid-template-columns: 1fr;
    }
    
    .vm-cta-content h2 {
        font-size: 32px;
    }
    
    .vm-cta-buttons {
        flex-direction: column;
    }
    
    .vm-btn-large {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .vm-about-hero-title {
        font-size: 28px;
    }
    
    .vm-about-hero-subtitle {
        font-size: 16px;
    }
    
    .intro-badge {
        bottom: 20px;
        left: 20px;
        padding: 15px 20px;
    }
    
    .intro-badge .badge-icon {
        font-size: 24px;
    }
    
    .intro-badge .badge-text {
        font-size: 14px;
    }
    
    .vm-cta-content h2 {
        font-size: 24px;
    }
}