/* 关于我们页面专用样式 */

/* 页面标题区域 */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 100px 0 60px;
    margin-top: 99px;
    text-align: center;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.breadcrumb a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.breadcrumb a:hover {
    opacity: 1;
}

.breadcrumb .separator {
    margin: 0 0.5rem;
    opacity: 0.6;
}

.breadcrumb .current {
    color: var(--white);
    font-weight: 600;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.page-subtitle {
    font-size: 1.3rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 协会简介 */
.intro-section {
    padding: 2rem 0;
    background: var(--background-light);
}

.intro-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.intro-text h2 {
    font-size: 2.5rem;
    color: var(--primary-dark);
    margin-bottom: 2rem;
    position: relative;
}

.intro-text h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--secondary-color);
}

.intro-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    text-indent: 2.2rem;
}

.intro-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.intro-stat {
    text-align: center;
    flex: 1;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

.intro-image {
    position: relative;
}

.intro-image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.intro-image img:hover {
    transform: scale(1.02);
}

/* 发展历程 */
.timeline-section {
    padding: 2rem 0;
    background: var(--white);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-light);
    transform: translateX(-50%);
}

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

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

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

.timeline-year {
    background: var(--primary-color);
    color: var(--white);
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    font-size: 1.1rem;
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    margin: 0 2rem;
}

.timeline-year::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    transform: translateY(-50%);
    z-index: 1;
}

.timeline-item:nth-child(odd) .timeline-year::after {
    right: -30px;
}

.timeline-item:nth-child(even) .timeline-year::after {
    left: -30px;
}

.timeline-content {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    flex: 1;
    position: relative;
}

.timeline-content h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.timeline-content p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 组织架构 */
.structure-section {
    padding: 2rem 0;
    background: var(--background-light);
}

.structure-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.structure-item {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s;
    border-top: 4px solid var(--primary-color);
}

.structure-item:hover {
    transform: translateY(-5px);
}

.structure-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.structure-item h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.structure-item p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 协会荣誉 */
.honors-section {
    padding: 2rem 0;
    background: var(--white);
}

.honors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.honor-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s;
    position: relative;
    overflow: hidden;
    border: 4px solid;
    animation: aniBorder 0.8s linear infinite alternate;
}
@keyframes aniBorder{
    from{border-color: rgba(255, 0, 0, 0.4);}
    to{border-color: red;}
}
.honors{
    width: 100%;
    height: 100%;
}

.honor-card:hover {
    transform: translateY(-5px);
}

.honor-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.honor-card h3 {
    color: var(--primary-dark);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.honor-card p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.honor-year {
    display: inline-block;
    background: var(--primary-color);
    color: var(--white);
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

/* 会员服务 */
.services-section {
    padding: 2rem 0;
    background: var(--background-light);
}

.services-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
}

.service-list {
    display: grid;
    gap: 1.5rem;
}

.service-item {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
}

.service-item h3 {
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.service-item p {
    color: var(--text-light);
    line-height: 1.6;
}

.membership-benefits {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    position: sticky;
    top: 100px;
}

.membership-benefits h3 {
    color: var(--primary-dark);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.membership-benefits ul {
    list-style: none;
    margin-bottom: 2rem;
}

.membership-benefits ul li {
    padding: 0.5rem 0;
    color: var(--text-dark);
    position: relative;
    padding-left: 1.5rem;
}

.membership-benefits ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.join-btn {
    display: block;
    width: 100%;
    background: var(--primary-color);
    color: var(--white);
    padding: 1rem;
    text-align: center;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: background 0.3s;
}

.join-btn:hover {
    background: var(--primary-dark);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-header {
        padding: 80px 0 40px;
        margin-top: 60px;
    }
    
    .page-title {
        font-size: 2.5rem;
    }
    
    .page-subtitle {
        font-size: 1.1rem;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .intro-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: row !important;
        margin-left: 60px;
    }
    
    .timeline-year {
        position: absolute;
        left: -90px;
        margin: 0;
    }
    
    .timeline-year::after {
        right: -30px;
        left: auto;
    }
    
    .structure-grid {
        grid-template-columns: 1fr;
    }
    
    .services-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .membership-benefits {
        position: static;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 2rem;
    }
    
    .intro-text h2 {
        font-size: 2rem;
    }
    
    .timeline-item {
        margin-left: 40px;
    }
    
    .timeline-year {
        left: -70px;
        padding: 0.5rem 1rem;
        font-size: 1rem;
    }
    
    .honors-grid {
        grid-template-columns: 1fr;
    }
}

/* 动画效果 */
.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 图片懒加载优化 */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s;
}

img.loaded {
    opacity: 1;
}

/* 性能优化 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}