/* ==========================================
   科技公司通用官网 - 主样式表
   渐变科技蓝主题 · 响应式自适应布局
   ========================================== */

/* ----- CSS 变量 ----- */
:root {
    --primary-100: #E8F0FF;
    --primary-200: #B3D4FF;
    --primary-300: #7EB8FF;
    --primary-400: #4D9AFF;
    --primary-500: #165DFF;
    --primary-600: #0A42CC;
    --primary-700: #0030A0;
    
    --gradient-primary: linear-gradient(135deg, #165DFF 0%, #0099FF 100%);
    --gradient-primary-2: linear-gradient(135deg, #0A42CC 0%, #165DFF 100%);
    --gradient-bg: linear-gradient(135deg, #F0F6FF 0%, #E8F4FD 100%);
    
    --text-primary: #1A1A2E;
    --text-secondary: #4A4A6A;
    --text-muted: #8C8CA1;
    --text-light: #FFFFFF;
    
    --bg-white: #FFFFFF;
    --bg-light: #F5F7FA;
    --bg-dark: #1A1A2E;
    
    --border-color: #E8ECF0;
    --shadow-sm: 0 2px 8px rgba(22, 93, 255, 0.08);
    --shadow-md: 0 4px 20px rgba(22, 93, 255, 0.12);
    --shadow-lg: 0 8px 40px rgba(22, 93, 255, 0.15);
    
    --font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    --max-width: 1200px;
    --header-height: 70px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ----- 重置 & 基础 ----- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary-500);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-600);
}

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

ul, ol {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
    margin: 16px auto 0;
}

.section-title p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-top: 16px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* 渐变文本 */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ----- 动画关键帧 ----- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes zoomIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================
   顶部导航栏
   ========================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    z-index: 1000;
    transition: var(--transition);
}

.site-header.scrolled {
    box-shadow: 0 2px 20px rgba(22, 93, 255, 0.1);
    border-bottom-color: var(--border-color);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 22px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo img {
    height: 36px;
    width: auto;
}

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

.main-nav ul {
    display: flex;
    align-items: center;
    gap: 4px;
}

.main-nav a {
    display: block;
    padding: 10px 18px;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary-500);
    background: var(--primary-100);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.language-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-light);
    border-radius: 20px;
    padding: 4px 12px;
}

.lang-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-muted);
    padding: 4px 6px;
    border-radius: 14px;
    transition: var(--transition);
    font-family: var(--font-family);
}

.lang-btn.active {
    color: var(--text-light);
    background: var(--gradient-primary);
    font-weight: 600;
}

.lang-btn:hover:not(.active) {
    color: var(--primary-500);
}

.lang-divider {
    color: var(--border-color);
    font-size: 14px;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    padding: 4px;
}

.mobile-menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端遮罩 */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s;
}

.mobile-overlay.active {
    opacity: 1;
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100%;
    background: var(--bg-white);
    z-index: 999;
    padding: 80px 30px 30px;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu ul li a {
    display: block;
    padding: 14px 0;
    font-size: 17px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    font-weight: 500;
}

.mobile-menu ul li a:hover {
    color: var(--primary-500);
}

.mobile-lang {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.mobile-lang .lang-btn {
    font-size: 15px;
    padding: 8px 16px;
}

/* ==========================================
   Banner 轮播
   ========================================== */
.banner-section {
    position: relative;
    margin-top: var(--header-height);
    overflow: hidden;
}

.banner-slider {
    position: relative;
    width: 100%;
    height: 650px;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
    pointer-events: none;
}

.banner-slide.active {
    opacity: 1;
    pointer-events: auto;
}

.banner-slide .banner-bg {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    background: linear-gradient(90deg, rgba(26, 26, 46, 0.7) 0%, rgba(26, 26, 46, 0.3) 50%, transparent 100%);
}

.banner-content .container {
    position: relative;
    z-index: 2;
}

.banner-content h1 {
    font-size: 52px;
    font-weight: 800;
    color: var(--text-light);
    margin-bottom: 20px;
    max-width: 650px;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.banner-content p {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    max-width: 550px;
    line-height: 1.8;
    margin-bottom: 30px;
}

.banner-btn {
    display: inline-block;
    padding: 14px 36px;
    background: var(--gradient-primary);
    color: var(--text-light);
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(22, 93, 255, 0.3);
}

.banner-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(22, 93, 255, 0.4);
    color: var(--text-light);
}

/* 轮播指示器 */
.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 5;
}

.banner-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    border: 2px solid rgba(255, 255, 255, 0.6);
    cursor: pointer;
    transition: var(--transition);
}

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

/* 轮播前后按钮 */
.banner-arrows {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 30px;
    z-index: 5;
    pointer-events: none;
}

.banner-arrow {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-light);
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
}

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

/* ==========================================
   公司简介区
   ========================================== */
.intro-section {
    background: var(--bg-white);
    position: relative;
}

.intro-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

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

.intro-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--bg-light);
}

.intro-image img {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    transition: transform 0.6s ease;
}

.intro-image:hover img {
    transform: scale(1.03);
}

.intro-text h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.3;
}

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

.intro-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--gradient-bg);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 6px;
}

/* ==========================================
   业务/产品展示
   ========================================== */
.products-section {
    background: var(--bg-light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-200);
}

.product-card-image {
    width: 100%;
    height: auto;
    display: block;
    background: var(--bg-light);
    transition: transform 0.6s ease;
}

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

.product-card-body {
    padding: 24px;
}

.product-card-body h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.product-card-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card .card-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.product-card .card-footer a {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-500);
    display: flex;
    align-items: center;
    gap: 6px;
}

.product-card .card-footer a:hover {
    gap: 10px;
}

/* 分类标签 */
.category-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.category-tab {
    padding: 10px 24px;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    background: var(--bg-white);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 15px;
    font-family: var(--font-family);
}

.category-tab:hover,
.category-tab.active {
    background: var(--gradient-primary);
    color: var(--text-light);
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(22, 93, 255, 0.3);
}

/* ==========================================
   新闻资讯
   ========================================== */
.news-section {
    background: var(--bg-white);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.news-card {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    background: var(--bg-white);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.news-card-image {
    width: 100%;
    height: auto;
    display: block;
    background: var(--bg-light);
    transition: transform 0.6s ease;
}

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

.news-card-body {
    padding: 24px;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.news-category {
    display: inline-block;
    padding: 3px 12px;
    background: var(--primary-100);
    color: var(--primary-500);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.news-card-body h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-body h3 a {
    color: var(--text-primary);
}

.news-card-body h3 a:hover {
    color: var(--primary-500);
}

.news-card-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==========================================
   合作伙伴
   ========================================== */
.partners-section {
    background: var(--bg-light);
    padding: 80px 0;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 30px;
    align-items: center;
}

.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    height: 100px;
}

.partner-item:hover {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-sm);
    transform: translateY(-3px);
}

.partner-item img {
    max-height: 50px;
    width: auto;
    object-fit: contain;
    opacity: 0.6;
    transition: var(--transition);
    filter: grayscale(30%);
}

.partner-item:hover img {
    opacity: 1;
    filter: grayscale(0%);
}

/* ==========================================
   底部
   ========================================== */
.site-footer {
    background: var(--bg-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr 0.8fr;
    gap: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo img {
    height: 36px;
    width: auto;
}

.footer-logo span {
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(135deg, #4D9AFF, #7EB8FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-icon {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.social-icon:hover {
    background: var(--gradient-primary);
    color: var(--text-light);
    transform: translateY(-3px);
}

.footer-col h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-light);
    position: relative;
    padding-bottom: 12px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--gradient-primary);
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary-300);
    padding-left: 4px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 16px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-contact li svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--primary-300);
}

.footer-qr .qr-code {
    width: 120px;
    height: 120px;
    background: var(--bg-white);
    border-radius: var(--radius-sm);
    padding: 8px;
}

.footer-qr .qr-code img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    margin-top: 60px;
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a:hover {
    color: var(--primary-300);
}

.footer-bottom p + p {
    margin-top: 6px;
}

/* ==========================================
   返回顶部
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: var(--text-light);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(22, 93, 255, 0.3);
}

.back-to-top.show {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(22, 93, 255, 0.4);
}

/* ==========================================
   页面头部横幅（内页）
   ========================================== */
.page-banner {
    margin-top: var(--header-height);
    padding: 120px 0 80px;
    background: var(--gradient-primary-2);
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
}

.page-banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
}

.page-banner .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.page-banner h1 {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 12px;
}

.page-banner p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 12px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.6);
}

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

/* ==========================================
   关于我们页面
   ========================================== */
.about-content {
    padding: 80px 0;
}

.about-content .container {
    max-width: 900px;
}

.about-content h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.about-content p {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* 发展历程时间线 */
.timeline {
    position: relative;
    padding: 40px 0;
}

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

.timeline-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 40px;
    position: relative;
}

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

.timeline-content {
    width: 45%;
    padding: 24px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.timeline-year {
    font-size: 24px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--gradient-primary);
    border: 3px solid var(--bg-white);
    box-shadow: 0 0 0 3px var(--primary-500);
    z-index: 1;
}

/* 团队展示 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
}

.team-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-200);
}

.team-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 20px;
    background: var(--gradient-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--primary-500);
}

.team-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
}

.team-card .team-role {
    font-size: 14px;
    color: var(--primary-500);
    margin-bottom: 12px;
}

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

/* 企业文化 */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.culture-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.culture-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.culture-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--gradient-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
}

.culture-card h4 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.culture-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   产品详情页
   ========================================== */
.product-detail {
    padding: 80px 0;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.product-detail-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.product-detail-image img {
    width: 100%;
    height: auto;
}

.product-detail-info h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
}

.product-detail-info .product-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
}

.features-list {
    display: grid;
    gap: 12px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--gradient-bg);
    border-radius: var(--radius-sm);
    font-size: 15px;
}

.feature-item::before {
    content: '✓';
    width: 24px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* ==========================================
   联系我们页面
   ========================================== */
.contact-section {
    padding: 80px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
}

.contact-info {
    padding: 30px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.contact-info h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-info-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    flex-shrink: 0;
}

.contact-info-text h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-info-text p {
    font-size: 14px;
    color: var(--text-secondary);
}

.contact-qr {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    background: var(--bg-white);
    border-radius: var(--radius-sm);
}

.contact-qr img {
    width: 140px;
    height: 140px;
    margin: 0 auto 10px;
}

.contact-qr p {
    font-size: 13px;
    color: var(--text-muted);
}

/* 留言表单 */
.contact-form {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 40px;
}

.contact-form h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-group label .required {
    color: #E53935;
    margin-left: 4px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: var(--font-family);
    transition: var(--transition);
    color: var(--text-primary);
    background: var(--bg-white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.1);
}

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

.btn-submit {
    display: inline-block;
    padding: 14px 40px;
    background: var(--gradient-primary);
    color: var(--text-light);
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-family);
    width: 100%;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(22, 93, 255, 0.4);
}

/* 表单消息 */
.form-message {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    display: none;
}

.form-message.success {
    display: block;
    background: #E8F5E9;
    color: #2E7D32;
    border: 1px solid #A5D6A7;
}

.form-message.error {
    display: block;
    background: #FFEBEE;
    color: #C62828;
    border: 1px solid #EF9A9A;
}

/* ==========================================
   分页器
   ========================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
    background: var(--bg-white);
    cursor: pointer;
    transition: var(--transition);
}

.page-btn:hover:not(.disabled):not(.active) {
    border-color: var(--primary-500);
    color: var(--primary-500);
}

.page-btn.active {
    background: var(--gradient-primary);
    color: var(--text-light);
    border-color: transparent;
}

.page-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

/* 平板端 (< 1024px) */
@media (max-width: 1024px) {
    .banner-slider {
        height: 500px;
    }
    .banner-content h1 {
        font-size: 38px;
    }
    .banner-content p {
        font-size: 17px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    .intro-grid {
        gap: 40px;
    }
    .product-detail-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    .intro-grid {
        grid-template-columns: 1fr;
    }
    .intro-image {
        order: -1;
    }
    .timeline::before {
        left: 20px;
    }
    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: row;
        padding-left: 50px;
    }
    .timeline-content {
        width: 100%;
    }
    .timeline-dot {
        left: 20px;
    }
}

/* 平板端 (< 768px) */
@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    .section-title p {
        font-size: 16px;
    }
    
    .main-nav {
        display: none;
    }
    
    .language-switch {
        margin-right: 8px;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-overlay.active {
        display: block;
    }
    
    .mobile-menu.active {
        display: block;
    }
    
    .banner-slider {
        height: 420px;
    }
    
    .banner-content h1 {
        font-size: 30px;
        max-width: 100%;
    }
    
    .banner-content p {
        font-size: 15px;
        max-width: 100%;
    }
    
    .banner-arrows {
        display: none;
    }
    
    .banner-dots {
        bottom: 20px;
    }
    
    .page-banner {
        padding: 100px 0 60px;
    }
    
    .page-banner h1 {
        font-size: 30px;
    }
    
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .intro-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    
    .culture-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    
    .team-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }
}

/* 手机端 (< 576px) */
@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .banner-slider {
        height: 350px;
    }
    
    .banner-content h1 {
        font-size: 24px;
    }
    
    .banner-content p {
        font-size: 14px;
        margin-bottom: 20px;
    }
    
    .banner-btn {
        padding: 12px 28px;
        font-size: 14px;
    }
    
    .section-title {
        margin-bottom: 40px;
    }
    
    .section-title h2 {
        font-size: 24px;
    }
    
    .page-banner h1 {
        font-size: 24px;
    }
    
    .page-banner p {
        font-size: 14px;
    }
    
    .intro-stats {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .product-card-image {
        height: 200px;
    }
    
    .category-tabs {
        gap: 8px;
    }
    
    .category-tab {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .culture-grid {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .partner-item {
        height: 80px;
        padding: 12px;
    }
    
    .partner-item img {
        max-height: 35px;
    }
    
    .contact-form {
        padding: 24px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}

/* 横屏优化 */
@media (max-height: 500px) and (orientation: landscape) {
    .banner-slider {
        height: 300px;
    }
    
    .banner-content h1 {
        font-size: 24px;
    }
    
    .banner-content p {
        font-size: 14px;
        margin-bottom: 16px;
    }
}