/* 现代化企业网站样式表 */

/* 基础重置和变量定义 */
:root {
    /* 主色调 - 科技蓝主题 */
    --primary-color: #164acc;
    --primary-dark: #0d3d99;
    --secondary-color: #4a7fd9;
    --accent-color: #164acc;
    
    /* 中性色 */
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #45505b;
    --black: #000000;
    
    /* 状态色 - 统一科技蓝风格 */
    --success: #164acc;
    --warning: #164acc;
    --danger: #dc3545;
    --info: #164acc;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    --gradient-dark: linear-gradient(135deg, var(--gray-800) 0%, var(--gray-900) 100%);
    --gradient-light: linear-gradient(135deg, var(--light-gray) 0%, var(--white) 100%);
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    
    /* 圆角 */
    --radius-sm: 0.125rem;
    --radius: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 字体 */
    --font-family-base: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* 过渡动画 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* 顶部导航栏 */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: var(--transition-normal);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

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

.logo img {
    height: 50px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.brand-en {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--primary-color);
    letter-spacing: 1px;
}

.brand-cn {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--gray-800);
}

.main-nav .nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    list-style: none;
}

.nav-item {
    position: relative;
}

.nav-item a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--gray-600);
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    transition: var(--transition-fast);
}

.arrowImgIcon {
    width: 20px;
    height: 20px;
    object-fit: cover;
}

.nav-item a:hover,
.nav-item.active a {
    color: var(--primary-color);
    background-color: var(--gray-100);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 280px;
    max-width: 400px;
    max-height: 80vh;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-normal);
    list-style: none;
    padding: var(--spacing-sm) 0;
    z-index: 1000;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--gray-600);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: var(--transition-fast);
}

.dropdown-menu li a:hover {
    background-color: var(--gray-100);
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.language-selector{
    border: none;
}

.language-selector select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    background-color: var(--white);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.language-selector select:hover {
    border-color: var(--primary-color);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.mobile-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--gray-700);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

/* 主视觉区域 */
.hero-section {
    position: relative;
    height: 100vh;
    overflow: hidden;
    margin-top: 80px;
}

.hero-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.slide.active {
    opacity: 1;
}

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: brightness(0.7);
}

.slide-content {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
    z-index: 2;
}

.slide-text {
    max-width: 600px;
    color: var(--white);
    animation: fadeInUp var(--transition-slow);
}

.slide-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.slide-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
    line-height: 1.6;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

.slider-indicators {
    position: absolute;
    bottom: var(--spacing-3xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-sm);
    z-index: 3;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition-fast);
}

.indicator.active,
.indicator:hover {
    background: var(--white);
    transform: scale(1.2);
}

.slider-arrows {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-2xl);
    z-index: 3;
}

.arrow {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--white);
    font-size: var(--font-size-lg);
    cursor: pointer;
    transition: var(--transition-fast);
    backdrop-filter: blur(10px);
}

.arrow:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* 核心解决方案区域 */
.solutions-section {
    padding: var(--spacing-3xl) 0;
    background: var(--light-gray);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-2xl);
}

.solution-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition-normal);
}

.solution-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.card-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

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

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.card-overlay i {
    color: var(--white);
    font-size: var(--font-size-3xl);
}

.solution-card:hover .card-overlay {
    opacity: 0.9;
}

.solution-card:hover .card-image img {
    transform: scale(1.1);
}

.card-content {
    padding: var(--spacing-xl);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
}

.card-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

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

/* 关于我们区域 */
.about-section {
    padding: var(--spacing-3xl) 0;
}

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

.about-image img {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.about-text .section-title {
    text-align: left;
    margin-bottom: var(--spacing-lg);
}

.about-description {
    margin-bottom: var(--spacing-2xl);
}

.about-description p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
    color: var(--gray-600);
}

.about-description .highlight {
    font-weight: 500;
    color: var(--primary-color);
    font-size: var(--font-size-lg);
}

.about-stats {
    display: flex;
    gap: var(--spacing-xl);
}

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

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 页脚 */
.main-footer {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-info .footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-info .footer-logo img {
    height: 30px;
}

.footer-info .footer-logo span {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--white);
}

.footer-description {
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--gray-800);
    color: var(--gray-300);
    text-decoration: none;
    transition: var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.link-column h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.link-column ul {
    list-style: none;
}

.link-column li {
    margin-bottom: var(--spacing-sm);
}

.link-column a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition-fast);
}

.link-column a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer-bottom p {
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--gray-500);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-2xl);
    right: var(--spacing-2xl);
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--primary-color);
    color: var(--white);
    border: none;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp var(--transition-normal);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xl);
    }
}

@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-2xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .slide-title {
        font-size: var(--font-size-4xl);
    }
    
    .slide-subtitle {
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 768px) {
    .header-content {
        height: 70px;
        padding: 0 var(--spacing-md);
    }
    
    .main-nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        border-bottom: 1px solid var(--gray-200);
        transform: translateY(-100%);
        transition: var(--transition-normal);
        opacity: 0;
        visibility: hidden;
        box-shadow: var(--shadow-lg);
        z-index: 999;
    }
    
    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        padding: var(--spacing-lg) 0;
        align-items: center;
    }
    
    .nav-item {
        width: 100%;
        text-align: center;
    }
    
    .nav-item a {
        display: block;
        padding: var(--spacing-md);
        border-radius: 0;
        border-bottom: 1px solid var(--gray-100);
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: var(--gray-50);
        margin-top: 0;
    }
    
    .mobile-toggle {
        display: flex;
        z-index: 1000;
    }
    
    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .slide-title {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--spacing-sm);
    }
    
    .slide-subtitle {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-xl);
    }
    
    .slide-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: center;
    }
    
    .btn {
        width: 200px;
        justify-content: center;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .solution-card {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
    
    .about-stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--spacing-lg);
    }
    
    .stat-item {
        min-width: 100px;
    }
    
    .slider-arrows {
        display: none;
    }
    
    .slider-indicators {
        bottom: var(--spacing-2xl);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-sm);
    }
    
    .section-subtitle {
        font-size: var(--font-size-base);
    }
    
    .slide-title {
        font-size: var(--font-size-2xl);
        line-height: 1.3;
    }
    
    .slide-subtitle {
        font-size: var(--font-size-sm);
    }
    
    .slide-content {
        padding: 0 var(--spacing-md);
    }
    
    .btn {
        width: 180px;
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    .solutions-section {
        padding: var(--spacing-2xl) 0;
    }
    
    .about-section {
        padding: var(--spacing-2xl) 0;
    }
    
    .solution-card {
        margin: 0 auto;
    }
    
    .card-content {
        padding: var(--spacing-lg);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-content {
        gap: var(--spacing-lg);
    }
    
    .about-stats {
        gap: var(--spacing-md);
    }
    
    .stat-item {
        min-width: 80px;
    }
    
    .stat-number {
        font-size: var(--font-size-2xl);
    }
    
    .back-to-top {
        right: var(--spacing-md);
        bottom: var(--spacing-md);
        width: 40px;
        height: 40px;
        font-size: var(--font-size-sm);
    }
    
    .hero-section {
        margin-top: 70px;
    }
}

/* 关于我们页面特有样式 */

/* 页面主体 */
.about-page {
    margin-top: 80px;
}

/* 英雄区域 */
.about-hero {
    background: linear-gradient(135deg, #164acc 0%, #4a7fd9 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.hero-divider {
    width: 60px;
    height: 4px;
    background: rgba(255, 255, 255, 0.8);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* 公司信息区域 */
.company-info {
    padding: 80px 0;
    background: #f8fafc;
}

.info-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.info-image img {
    width: 100%;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.info-text .section-title {
    text-align: left;
    margin-bottom: 30px;
    color: #1e293b;
}

.company-description {
    margin-bottom: 40px;
}

.company-description p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: #334155;
    font-size: 1.1rem;
}

.company-description .highlight {
    font-weight: 600;
    color: #164acc;
    font-size: 1.2rem;
}

.company-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

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

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #164acc;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 1rem;
    color: #64748b;
    font-weight: 500;
}

/* 时间轴区域 */
.timeline-section {
    padding: 80px 0;
    background: white;
}

.timeline {
    max-width: 800px;
    margin: 50px auto 0;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 3px;
    background: linear-gradient(to bottom, #164acc, #4a7fd9);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    width: 100%;
}

.timeline-item:nth-child(odd) {
    padding-right: calc(50% + 30px);
    text-align: right;
}

.timeline-item:nth-child(even) {
    padding-left: calc(50% + 30px);
    text-align: left;
}

.timeline-year {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: #164acc;
    color: white;
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
    z-index: 2;
}

.timeline-content {
    background: #f1f5f9;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.timeline-content:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.timeline-content h3 {
    color: #1e293b;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.timeline-content p {
    color: #64748b;
    line-height: 1.6;
}

/* 核心优势区域 */
.advantages-section {
    padding: 80px 0;
    background: #f8fafc;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.advantage-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #164acc, #4a7fd9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 2rem;
}

.advantage-card h3 {
    color: #1e293b;
    margin-bottom: 15px;
    font-size: 1.4rem;
}

.advantage-card p {
    color: #64748b;
    line-height: 1.7;
}

/* 联系信息区域 */
.contact-section {
    padding: 80px 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.contact-info .section-title {
    margin-bottom: 40px;
    color: #1e293b;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: #164acc;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-item h4 {
    color: #1e293b;
    margin-bottom: 8px;
    font-size: 1.2rem;
}

.contact-item p {
    color: #64748b;
    margin: 0;
}

.map-placeholder {
    background: #f1f5f9;
    height: 300px;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #64748b;
    border: 2px dashed #cbd5e1;
    overflow: hidden;
}

.map-placeholder i {
    font-size: 3rem;
    margin-bottom: 15px;
    color: #94a3b8;
}

.map-placeholder img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 响应式适配 */
@media (max-width: 1024px) {
    .info-content {
        gap: 40px;
    }
    
    .company-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .contact-content {
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .about-page {
        margin-top: 70px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .info-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .company-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        padding-left: 70px;
        padding-right: 0;
        text-align: left;
    }
    
    .timeline-year {
        left: 30px;
        transform: translateX(0);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .company-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-item {
        padding: 15px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}