/**
 * 诚不忧科技 - 全局样式
 * 蓝白配色，简约大气，科技感
 */

/* ========================================
   1. CSS变量定义
======================================== */
:root {
    /* 主色调 */
    --primary: #0052D9;
    --primary-light: #436AEE;
    --primary-dark: #003BB5;
    --primary-gradient: linear-gradient(135deg, #0052D9 0%, #436AEE 100%);
    
    /* 背景色 */
    --bg-white: #FFFFFF;
    --bg-gray: #F5F8FC;
    --bg-dark: #1A1A2E;
    
    /* 文字色 */
    --text-primary: #1A1A2E;
    --text-secondary: #666666;
    --text-light: #999999;
    --text-white: #FFFFFF;
    
    /* 边框色 */
    --border-color: #E8ECF1;
    --border-light: #F0F4F8;
    
    /* 状态色 */
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #3B82F6;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 82, 217, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 82, 217, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 82, 217, 0.12);
    --shadow-hover: 0 12px 40px rgba(0, 82, 217, 0.15);
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    
    /* 过渡 */
    --transition: all 0.3s ease;
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
}

/* ========================================
   2. 基础重置
======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-light);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ========================================
   3. 通用工具类
======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.container-fluid {
    width: 100%;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--text-secondary); }
.text-white { color: var(--text-white); }

.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.hidden { display: none; }

/* ========================================
   4. 按钮样式
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-white);
    box-shadow: 0 4px 15px rgba(67, 106, 238, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(67, 106, 238, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-white);
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: var(--text-white);
}

.btn-white {
    background: var(--bg-white);
    color: var(--primary);
}

.btn-white:hover {
    background: var(--bg-gray);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1rem;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

/* ========================================
   5. 卡片样式
======================================== */
.card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.card-img {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.card-text {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ========================================
   6. 标题样式
======================================== */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary-gradient);
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
}

/* ========================================
   7. 表单样式
======================================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: 0.9375rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.9375rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-white);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.1);
}

.form-control::placeholder {
    color: var(--text-light);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* ========================================
   8. 头部导航
======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo img {
    height: 40px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
    padding: var(--spacing-sm) 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ========================================
   9. Hero区域
======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #E8F0FE 0%, #F5F8FC 50%, #FFFFFF 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(67, 106, 238, 0.1) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 650px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 16px;
    background: rgba(0, 82, 217, 0.1);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.hero-title span {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.hero-image {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 50%;
    max-width: 600px;
}

.hero-image img {
    width: 100%;
    animation: float 6s ease-in-out infinite;
}

/* ========================================
   10. Banner轮播
======================================== */
.banner {
    position: relative;
    height: 600px;
    overflow: hidden;
}

.banner-slides {
    display: flex;
    height: 100%;
    transition: transform 0.5s ease;
}

.banner-slide {
    min-width: 100%;
    height: 100%;
    position: relative;
    background-size: cover;
    background-position: center;
}

.banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 82, 217, 0.8) 0%, rgba(26, 26, 46, 0.7) 100%);
}

.banner-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--text-white);
    max-width: 800px;
    padding: 0 var(--spacing-xl);
}

.banner-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.banner-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-sm);
}

.banner-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition);
}

.banner-dot.active {
    background: var(--text-white);
    transform: scale(1.2);
}

.banner-arrows {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    pointer-events: none;
}

.banner-arrow {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    pointer-events: auto;
    font-size: 1.25rem;
}

.banner-arrow:hover {
    background: var(--primary);
}

/* ========================================
   11. 产品分类
======================================== */
.category-section {
    background: var(--bg-gray);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.category-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: pointer;
}

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

.category-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, #E8F0FE 0%, #D4E4FF 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    transition: var(--transition);
}

.category-card:hover .category-icon {
    background: var(--primary-gradient);
    color: var(--text-white);
    transform: scale(1.1);
}

.category-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

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

/* ========================================
   12. 产品列表
======================================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.product-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    padding: 4px 12px;
    background: var(--primary);
    color: var(--text-white);
    font-size: 0.75rem;
    border-radius: 50px;
}

.product-info {
    padding: var(--spacing-lg);
}

.product-category {
    font-size: 0.75rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.product-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.product-summary {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.product-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.product-price span {
    font-size: 0.875rem;
    font-weight: 400;
}

.product-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--primary);
}

.product-link:hover {
    gap: var(--spacing-sm);
}

/* ========================================
   13. 关于我们
======================================== */
.about-section {
    background: var(--bg-dark);
    color: var(--text-white);
    position: relative;
    overflow: hidden;
}

.about-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, rgba(67, 106, 238, 0.2) 0%, transparent 100%);
}

/* ========================================
   14. 关于我们页面
======================================== */

/* ========================================
   15. 新闻列表
======================================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.news-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.news-image {
    aspect-ratio: 16/9;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-content {
    padding: var(--spacing-lg);
}

.news-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.8125rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.news-category {
    color: var(--primary);
    font-weight: 500;
}

.news-date {
    display: flex;
    align-items: center;
    gap: 4px;
}

.news-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-title:hover {
    color: var(--primary);
}

.news-summary {
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ========================================
   15. 合作伙伴
======================================== */
.partner-section {
    background: var(--bg-gray);
}

.partner-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-2xl);
}

.partner-item {
    width: 150px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: var(--transition);
    filter: grayscale(100%);
    opacity: 0.6;
}

.partner-item:hover {
    filter: grayscale(0%);
    opacity: 1;
    box-shadow: var(--shadow-md);
}

.partner-item img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* ========================================
   16. 联系方式
======================================== */
.contact-section {
    background: var(--bg-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #E8F0FE 0%, #D4E4FF 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--primary);
    flex-shrink: 0;
}

.contact-label {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xs);
}

.contact-value {
    font-size: 1.0625rem;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-form {
    background: var(--bg-gray);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
}

.contact-form-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.contact-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-top: calc(-1 * var(--spacing-md));
}

.contact-text h4 {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.contact-text p {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
}

.contact-form-wrapper {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-sm);
}

.contact-form-wrapper h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.contact-form-wrapper .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-form-wrapper .form-group {
    margin-bottom: var(--spacing-lg);
}

.contact-form-wrapper .btn-lg {
    width: 100%;
    padding: 14px;
}

.map-section {
    background: var(--bg-gray);
    padding: var(--spacing-3xl) 0;
}

.map-container {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.map-placeholder {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    height: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.map-placeholder::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 40px,
            #dee2e6 40px,
            #dee2e6 41px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 40px,
            #dee2e6 40px,
            #dee2e6 41px
        );
    opacity: 0.5;
}

.map-placeholder-content {
    position: relative;
    z-index: 1;
    text-align: center;
    background: white;
    padding: var(--spacing-2xl) var(--spacing-3xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.map-placeholder i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    display: block;
}

.map-placeholder p {
    font-size: 1.125rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.map-placeholder span {
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: block;
    margin-bottom: var(--spacing-lg);
}

.map-location-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.map-location-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.3);
    color: white;
}

/* ========================================
   17. 页脚
======================================== */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.footer-brand img {
    height: 40px;
}

.footer-brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white);
}

.footer-desc {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
}

.footer-title {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-white);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom-links a:hover {
    color: var(--text-white);
}

/* ========================================
   18. 分页
======================================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.pagination a,
.pagination span {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    transition: var(--transition);
}

.pagination a {
    background: var(--bg-white);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.pagination a:hover {
    background: var(--primary);
    color: var(--text-white);
    border-color: var(--primary);
}

.pagination .current {
    background: var(--primary);
    color: var(--text-white);
    border: 1px solid var(--primary);
}

.pagination .disabled {
    background: var(--bg-gray);
    color: var(--text-light);
    cursor: not-allowed;
}

/* ========================================
   19. 页面内容区
======================================== */
.page-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--text-white);
    padding: 120px 0 var(--spacing-3xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    position: relative;
}

.page-breadcrumb {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 0.9375rem;
    opacity: 0.9;
    position: relative;
}

.page-breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
}

.page-breadcrumb a:hover {
    color: var(--text-white);
}

.page-breadcrumb span {
    opacity: 0.6;
}

/* ========================================
   20. 筛选器
======================================== */
.filter-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
}

.filter-tabs {
    display: flex;
    gap: var(--spacing-sm);
}

.filter-tab {
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    background: var(--bg-gray);
    transition: var(--transition);
    cursor: pointer;
}

.filter-tab:hover,
.filter-tab.active {
    background: var(--primary);
    color: var(--text-white);
}

.filter-search {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.filter-search input {
    width: 200px;
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

.filter-search input:focus {
    outline: none;
    border-color: var(--primary);
}

/* ========================================
   21. 产品详情
======================================== */
.product-detail {
    padding: var(--spacing-2xl) 0;
}

.product-detail-header {
    background: linear-gradient(135deg, #E8F0FE 0%, #F5F8FC 100%);
    padding: var(--spacing-2xl) 0;
    margin-bottom: var(--spacing-2xl);
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
}

.product-gallery {
    position: sticky;
    top: 100px;
}

.product-main-image {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    background: var(--bg-gray);
}

.product-main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-thumbs {
    display: flex;
    gap: var(--spacing-sm);
}

.product-thumb {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

.product-thumb.active,
.product-thumb:hover {
    border-color: var(--primary);
}

.product-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-detail-info h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.product-detail-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
}

.product-detail-price span {
    font-size: 1rem;
    font-weight: 400;
}

.product-detail-summary {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

.product-detail-params {
    margin-bottom: var(--spacing-xl);
}

.product-detail-params h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.params-table {
    width: 100%;
    border-collapse: collapse;
}

.params-table tr {
    border-bottom: 1px solid var(--border-light);
}

.params-table td {
    padding: var(--spacing-sm) 0;
    font-size: 0.9375rem;
}

.params-table td:first-child {
    color: var(--text-light);
    width: 120px;
}

.params-table td:last-child {
    color: var(--text-primary);
}

.product-actions {
    display: flex;
    gap: var(--spacing-md);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

/* ========================================
   22. 动画
======================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

@keyframes float {
    0%, 100% { transform: translateY(-50%) translateX(0); }
    50% { transform: translateY(-52%) translateX(-10px); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.animate-fadeIn {
    animation: fadeIn 0.5s ease;
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease;
}

/* ========================================
   23. 响应式设计
======================================== */
@media (max-width: 1199px) {
    .container {
        max-width: 960px;
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .hero-image {
        width: 45%;
    }
    
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 991px) {
    .container {
        max-width: 720px;
    }
    
    .hero {
        min-height: auto;
        padding: 120px 0 var(--spacing-3xl);
    }
    
    .hero-content {
        text-align: center;
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image {
        display: none;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        margin-top: var(--spacing-2xl);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .product-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .product-gallery {
        position: static;
    }
}

@media (max-width: 767px) {
    .container {
        max-width: 100%;
        padding: 0 var(--spacing-lg);
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .header-inner {
        height: 60px;
    }
    
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        box-shadow: var(--shadow-md);
    }
    
    .nav.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-desc {
        font-size: 1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .banner {
        height: 400px;
    }
    
    .banner-title {
        font-size: 1.75rem;
    }
    
    .banner-subtitle {
        font-size: 1rem;
    }
    
    .category-grid {
        grid-template-columns: 1fr;
    }
    
    .product-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .about-stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        justify-content: center;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .filter-bar {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .filter-tabs {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .filter-search input {
        width: 100%;
    }
    
    .page-header {
        padding: 100px 0 var(--spacing-2xl);
    }
    
    .page-title {
        font-size: 1.75rem;
    }
    
    .product-detail-info h1 {
        font-size: 1.5rem;
    }
    
    .product-detail-price {
        font-size: 1.5rem;
    }
    
    .product-actions {
        flex-direction: column;
    }
    
    .product-actions .btn {
        width: 100%;
    }
}

/* ========================================
   24. 其他工具类
======================================== */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }

.py-sm { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-xl { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }
.py-2xl { padding-top: var(--spacing-2xl); padding-bottom: var(--spacing-2xl); }

/* ========================================
   25. 新闻详情页
======================================== */
.article-container {
    max-width: 800px;
    margin: 0 auto;
}

.article-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.article-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.article-meta {
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
}

.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.article-cover {
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.article-cover img {
    width: 100%;
    border-radius: var(--radius-lg);
}

.article-content {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.article-content p {
    margin-bottom: var(--spacing-lg);
}

.article-share {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl);
    background: var(--bg-gray);
    border-radius: var(--radius-lg);
    text-align: center;
}

.article-share p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.article-share-btns {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

/* ========================================
   26. 关于我们页面
======================================== */

/* Hero Banner */
.about-hero {
    position: relative;
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #0052D9 0%, #0052D9 50%, #1a1a2e 100%);
    overflow: hidden;
}

.about-hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.about-hero-shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
}

.about-hero-shape-1 {
    width: 600px;
    height: 600px;
    top: -200px;
    right: -100px;
}

.about-hero-shape-2 {
    width: 400px;
    height: 400px;
    bottom: -100px;
    left: -100px;
}

.about-hero-shape-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    left: 30%;
    background: rgba(255, 255, 255, 0.08);
}

.about-hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.about-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50px;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.about-hero-badge i {
    color: #fbbf24;
}

.about-hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.2;
    margin-bottom: 20px;
}

.about-hero-title span {
    background: linear-gradient(90deg, #fbbf24, #f59e0b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-hero-desc {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
    margin-bottom: 32px;
}

.about-hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.about-hero-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
}

.about-hero-feature i {
    color: #10b981;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 0.875rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
    margin-bottom: 16px;
}

.label-line {
    width: 40px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.section-heading {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin: 0;
}

h1.section-heading {
    font-size: 2.75rem;
}

/* About Intro Section */
.about-intro-section {
    background: var(--bg-white);
}

.about-intro-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-intro-content .section-label {
    justify-content: flex-start;
}

.about-intro-content .section-heading {
    text-align: left;
    margin-bottom: 32px;
}

.about-intro-text {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    line-height: 1.9;
    margin-bottom: 32px;
}

.about-intro-text p {
    margin-bottom: 16px;
}

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

.about-intro-features {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.about-intro-feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: var(--bg-gray);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    color: var(--text-primary);
    transition: var(--transition);
}

.about-intro-feature-item:hover {
    background: var(--primary);
    color: white;
}

.about-intro-feature-item i {
    color: var(--primary);
    font-size: 1rem;
    transition: var(--transition);
}

.about-intro-feature-item:hover i {
    color: white;
}

.about-intro-visual {
    position: relative;
    height: 400px;
}

.about-intro-card {
    position: absolute;
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: 0 10px 40px rgba(0, 82, 217, 0.12);
    text-align: center;
    transition: var(--transition);
}

.about-intro-card:first-child {
    top: 0;
    left: 0;
    right: 0;
    z-index: 3;
}

.about-intro-card:nth-child(2) {
    bottom: 40px;
    left: -20px;
    z-index: 2;
}

.about-intro-card:nth-child(3) {
    bottom: 0;
    right: 0;
    z-index: 1;
}

.about-intro-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 82, 217, 0.2);
}

.about-intro-card-small {
    padding: 24px;
}

.about-intro-card-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, #E8F0FE 0%, #D4E4FF 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--primary);
}

.about-intro-card-small .about-intro-card-icon {
    width: 44px;
    height: 44px;
    font-size: 1rem;
}

.about-intro-card-num {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 8px;
}

.about-intro-card-small .about-intro-card-num {
    font-size: 2rem;
}

.about-intro-card-num span {
    font-size: 1.5rem;
}

.about-intro-card-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* About Stats Section */
.about-stats-section {
    background: linear-gradient(135deg, #1a1a2e 0%, #0052D9 100%);
    position: relative;
    overflow: hidden;
}

.about-stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.about-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
    z-index: 1;
}

.about-stats-card {
    text-align: center;
    padding: 40px 24px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.about-stats-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-8px);
}

.about-stats-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.about-stats-number {
    font-size: 3rem;
    font-weight: 800;
    color: white;
    line-height: 1;
    margin-bottom: 8px;
}

.about-stats-number span {
    font-size: 2rem;
}

.about-stats-label {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
}

/* History Section */
.about-history-section {
    background: var(--bg-gray);
}

.timeline-modern {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 0;
}

.timeline-modern-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 4px;
    background: linear-gradient(180deg, var(--primary) 0%, rgba(0, 82, 217, 0.2) 100%);
    transform: translateX(-50%);
    border-radius: 2px;
}

.timeline-modern-item {
    position: relative;
    width: 50%;
    padding: 0 60px;
    margin-bottom: 40px;
}

.timeline-modern-item.left {
    left: 0;
    text-align: right;
}

.timeline-modern-item.right {
    left: 50%;
    text-align: left;
}

.timeline-modern-item::before {
    content: '';
    position: absolute;
    top: 20px;
    width: 20px;
    height: 4px;
    background: var(--primary);
}

.timeline-modern-item.left::before {
    right: 0;
}

.timeline-modern-item.right::before {
    left: 0;
}

.timeline-modern-marker {
    margin-bottom: 16px;
}

.timeline-modern-dot {
    width: 20px;
    height: 20px;
    background: var(--primary);
    border: 4px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--primary);
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.timeline-modern-item.left .timeline-modern-dot {
    position: absolute;
    right: -70px;
    top: 18px;
}

.timeline-modern-item.right .timeline-modern-dot {
    position: absolute;
    left: -70px;
    top: 18px;
}

.timeline-modern-year {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-top: 12px;
}

.timeline-modern-item.left .timeline-modern-year {
    text-align: center;
}

.timeline-modern-card {
    background: white;
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.timeline-modern-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.timeline-modern-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.timeline-modern-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Advantage Section */
.about-advantage-section {
    background: white;
}

.advantage-modern-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.advantage-modern-card {
    position: relative;
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    overflow: hidden;
}

.advantage-modern-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.advantage-modern-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: transparent;
}

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

.advantage-modern-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, #E8F0FE 0%, #D4E4FF 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary);
    transition: var(--transition);
    overflow: hidden;
}

.advantage-modern-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 50%;
}

.advantage-modern-card:hover .advantage-modern-icon {
    background: var(--primary-gradient);
    transform: scale(1.1);
}

.advantage-modern-card:hover .advantage-modern-icon i {
    color: white;
}

.advantage-modern-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.advantage-modern-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.advantage-modern-number {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 3rem;
    font-weight: 800;
    color: var(--border-color);
    opacity: 0.5;
    line-height: 1;
}

/* Team Section */
.about-team-section {
    background: var(--bg-gray);
}

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

.team-modern-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
}

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

.team-modern-avatar {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--avatar-color, #0052D9) 0%, var(--primary-light, #436AEE) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
    font-weight: 700;
}

.team-modern-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.team-modern-info {
    padding: 24px;
}

.team-modern-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.team-modern-position {
    font-size: 0.9375rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.team-modern-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.team-modern-social {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 0 24px 24px;
}

.team-social-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: var(--transition);
}

.team-social-link:hover {
    background: var(--primary);
    color: white;
}

/* CTA Section */
.about-cta-section {
    background: linear-gradient(135deg, #1a1a2e 0%, #0052D9 100%);
    position: relative;
    overflow: hidden;
}

.about-cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.about-cta {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.about-cta-content {
    flex: 1;
}

.about-cta-title {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
}

.about-cta-desc {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
}

.about-cta-buttons {
    display: flex;
    gap: 16px;
    flex-shrink: 0;
}

.btn-outline-white {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition);
    cursor: pointer;
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
    color: white;
}

/* 响应式调整 */
@media (max-width: 1199px) {
    .about-intro-grid {
        gap: 60px;
    }
    
    .about-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantage-modern-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-modern-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-cta {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 991px) {
    .about-hero {
        padding: 120px 0 80px;
    }
    
    .about-hero-title {
        font-size: 2.5rem;
    }
    
    .about-intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-intro-visual {
        height: auto;
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
    
    .about-intro-card {
        position: static !important;
    }
    
    .timeline-modern {
        padding-left: 0;
    }
    
    .timeline-modern-line {
        left: 0;
    }
    
    .timeline-modern-item {
        width: 100%;
        padding-left: 40px;
        padding-right: 0;
        text-align: left;
    }
    
    .timeline-modern-item.left {
        left: 0;
        text-align: left;
    }
    
    .timeline-modern-item.right {
        left: 0;
    }
    
    .timeline-modern-item::before {
        left: 0;
        right: auto;
    }
    
    .timeline-modern-item.left::before,
    .timeline-modern-item.right::before {
        left: 0;
        right: auto;
    }
    
    .timeline-modern-dot {
        position: absolute;
        left: -10px;
        right: auto;
    }
    
    .timeline-modern-item.left .timeline-modern-dot,
    .timeline-modern-item.right .timeline-modern-dot {
        left: -10px;
        right: auto;
    }
    
    .timeline-modern-item.left .timeline-modern-year,
    .timeline-modern-item.right .timeline-modern-year {
        text-align: left;
    }
}

@media (max-width: 767px) {
    .about-hero {
        padding: 100px 0 60px;
    }
    
    .about-hero-title {
        font-size: 2rem;
    }
    
    .about-hero-desc {
        font-size: 1rem;
    }
    
    .about-hero-features {
        flex-direction: column;
        gap: 12px;
    }
    
    .section-heading {
        font-size: 1.75rem;
    }
    
    .about-intro-visual {
        grid-template-columns: 1fr;
    }
    
    .about-intro-features {
        flex-direction: column;
    }
    
    .about-stats-grid {
        grid-template-columns: 1fr;
    }
    
    .advantage-modern-grid {
        grid-template-columns: 1fr;
    }
    
    .team-modern-grid {
        grid-template-columns: 1fr;
    }
    
    .about-cta-title {
        font-size: 1.5rem;
    }
    
    .about-cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .about-cta-buttons .btn {
        width: 100%;
    }
}
.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.about-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
}

.about-feature-icon {
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    flex-shrink: 0;
}

.about-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.about-stat-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    text-align: center;
    color: white;
}

.about-stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.about-stat-label {
    font-size: 0.9375rem;
    opacity: 0.9;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-content {
    color: rgba(255, 255, 255, 0.9);
}

.about-desc {
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   27. 时间轴
======================================== */
.timeline {
    position: relative;
    padding-left: 40px;
    margin-top: var(--spacing-2xl);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary);
    opacity: 0.3;
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
    padding-left: 20px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -33px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--primary);
}

.timeline-content {
    background: white;
    padding: 20px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.timeline-year {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.875rem;
}

.timeline-title {
    font-size: 1.125rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.timeline-desc {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ========================================
   28. 团队成员卡片
======================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.team-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    text-align: center;
}

.team-avatar {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(135deg, #E8F0FE 0%, #D4E4FF 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.team-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.team-info {
    padding: var(--spacing-lg);
}

.team-name {
    font-size: 1.125rem;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.team-position {
    color: var(--primary);
    font-size: 0.875rem;
    margin-bottom: 8px;
}

.team-desc {
    color: var(--text-secondary);
    font-size: 0.8125rem;
}

/* ========================================
   29. 核心优势卡片
======================================== */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.advantage-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: linear-gradient(135deg, #E8F0FE 0%, #D4E4FF 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
    background: var(--primary-gradient);
}

.advantage-card:hover .advantage-icon .advantage-emoji {
    filter: brightness(0) invert(1);
}

.advantage-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.advantage-desc {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ========================================
   30. 响应式优化
======================================== */
@media (max-width: 1199px) {
    .about-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 991px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .about-stats {
        margin-top: var(--spacing-2xl);
    }
}

@media (max-width: 767px) {
    .article-title {
        font-size: 1.5rem;
    }
    
    .article-meta {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }
    
    .about-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .about-stat-number {
        font-size: 1.75rem;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .advantage-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 10px;
    }
    
    .timeline-item::before {
        left: -25px;
        width: 12px;
        height: 12px;
    }
    
    .timeline-item {
        padding-left: 10px;
    }
}