/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1B51BE;
    --secondary-color: #0e5aa7;
    --text-dark: #333;
    --text-light: #666;
    --text-white: #fff;
    --bg-light: #f5f5f5;
    --bg-dark: #2a2a2a;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Microsoft YaHei', 'SimSun', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1920px;
    margin: 0 auto;
    padding: 0 60px;
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: transparent;
    /* 可选：添加轻微的模糊效果 */
    /* backdrop-filter: blur(5px); */
    z-index: 1000;
    /* 滚动后添加阴影 */
    transition: all 0.3s ease;
}

/* 滚动后导航栏样式 */
.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 滚动后文字变回深色 */
.header.scrolled .nav-menu a {
    color: var(--text-dark);
}

.header.scrolled .nav-right {
    color: var(--text-dark);
}

.header.scrolled .mobile-menu-toggle span {
    background: var(--text-dark);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 60px;
}

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

.nav {
    display: flex;
    align-items: center;
    gap: 40px;
    transition: opacity 0.3s ease;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-item {
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: white;
    font-size: 16px;
    transition: color 0.3s;
    position: relative;
    display: block;
    padding: 10px 0;
}

/* 下拉菜单样式 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: white;
    min-width: 220px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
    border-radius: 12px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    list-style: none;
    padding: 12px 0;
    margin: 0;
    margin-top: 15px;
    border: 1px solid rgba(27, 81, 190, 0.08);
    backdrop-filter: blur(10px);
}

/* 下拉菜单箭头装饰 */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 12px;
    background: white;
    border-left: 1px solid rgba(27, 81, 190, 0.08);
    border-top: 1px solid rgba(27, 81, 190, 0.08);
    transform: translateX(-50%) rotate(45deg);
}

.dropdown-menu li {
    margin: 0;
    position: relative;
}

/* 添加分隔线 */
.dropdown-menu li:not(:last-child)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 16px;
    right: 16px;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(0, 0, 0, 0.06), transparent);
}

.dropdown-menu a {
    color: #2c3e50 !important;
    padding: 14px 24px;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
    margin: 4px 12px;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

/* 添加悬停光晕效果 */
.dropdown-menu a::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 3px;
    height: 0;
    background: var(--primary-color);
    border-radius: 0 3px 3px 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(-50%);
}

.dropdown-menu a::after {
    content: '›';
    position: absolute;
    right: 20px;
    font-size: 18px;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: white;
}

.dropdown-menu a:hover {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white !important;
    transform: translateX(2px);
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(27, 81, 190, 0.25);
}

.dropdown-menu a:hover::before {
    height: 100%;
}

.dropdown-menu a:hover::after {
    opacity: 1;
    transform: translateX(0);
}

/* 悬停时显示下拉菜单 */
.nav-item:hover .dropdown-menu,
.nav-item .dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* 下拉菜单箭头 */
.nav-item::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -8px;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid white;
    transition: transform 0.3s ease;
}

.nav-item:hover::after {
    transform: translateY(-50%) rotate(180deg);
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s;
}

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

.nav-right {
    display: flex;
    gap: 20px;
    font-size: 18px;
    cursor: pointer;
    color: white;
}

.nav-right img {
    height: 20px;
    width: auto;
    vertical-align: middle;
}

.lang-switch {
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    display: inline-block;
}

.lang-switch:hover {
    opacity: 0.7;
    transform: translateY(-1px);
}

.search-icon {
    cursor: pointer;
    transition: opacity 0.3s;
    display: inline-block;
}

.search-icon:hover {
    opacity: 0.7;
}

/* 搜索框样式 */
.search-box {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    z-index: 1002;
    opacity: 0;
    transition: opacity 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.search-box.active {
    display: flex;
    opacity: 1;
}

.search-box-content {
    display: flex;
    align-items: center;
    gap: 20px;
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
    padding: 0 40px;
    background: white;
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    height: 60px;
}

.search-box-icon {
    height: 22px;
    width: auto;
    flex-shrink: 0;
    opacity: 0.6;
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 16px;
    padding: 0;
    background: transparent;
    color: var(--text-dark);
    font-family: 'Microsoft YaHei', 'SimSun', Arial, sans-serif;
}

.search-input::placeholder {
    color: #999;
    font-size: 15px;
}

.search-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 28px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    white-space: nowrap;
    flex-shrink: 0;
    font-family: 'Microsoft YaHei', 'SimSun', Arial, sans-serif;
}

.search-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(27, 81, 190, 0.3);
}

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

.search-close {
    font-size: 28px;
    color: var(--text-dark);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
    flex-shrink: 0;
    font-weight: 300;
    line-height: 1;
    opacity: 0.6;
}

.search-close:hover {
    background: rgba(27, 81, 190, 0.1);
    transform: rotate(90deg);
    opacity: 1;
    color: var(--primary-color);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    transition: all 0.3s;
}

/* 首屏横幅 */
.hero-banner {
    height: 100vh;
    background: 
                url('../images/home/banner.png') center/cover no-repeat;
    /* 占位渐变背景 */
    /* background: linear-gradient(180deg, #4facfe 0%, #00f2fe 100%); */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* 添加动画背景效果 */
.hero-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: backgroundMove 20s linear infinite;
    pointer-events: none;
}

@keyframes backgroundMove {
    0% {
        transform: translate(0, 0);
    }
    100% {
        transform: translate(50px, 50px);
    }
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 18px;
    letter-spacing: 3px;
    margin-bottom: 20px;
    opacity: 0.9;
}

.hero-title {
    font-size: 56px;
    font-weight: 300;
    letter-spacing: 8px;
    margin-bottom: 50px;
}

.btn-primary {
    display: inline-block;
    padding: 15px 50px;
    border: 2px solid white;
    color: white;
    text-decoration: none;
    font-size: 16px;
    border-radius: 30px;
    transition: all 0.3s;
}

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

/* 首页轮播图 */
.hero-banner-carousel {
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.carousel-wrapper {
    width: 100%;
    height: 100%;
    position: relative;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
}

.carousel-item.active {
    opacity: 1;
    z-index: 1;
}

/* 轮播箭头 */
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: white;
    font-size: 40px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.carousel-arrow:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev {
    left: 40px;
}

.carousel-next {
    right: 40px;
}

/* 轮播指示器 */
.carousel-indicators {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 10;
}

.carousel-indicators .indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.carousel-indicators .indicator:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: scale(1.2);
}

.carousel-indicators .indicator.active {
    background: white;
    width: 30px;
    border-radius: 6px;
    border-color: rgba(255, 255, 255, 0.5);
}

.scroll-indicator {
    position: absolute;
    bottom: 50px;
    z-index: 10;
    left: 50%;
    transform: translateX(-50%);
}

.mouse-icon {
    width: 30px;
    height: 50px;
    border: 2px solid white;
    border-radius: 15px;
    position: relative;
    animation: scrollDown 2s infinite;
}

.mouse-icon::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 10px;
    background: white;
    border-radius: 2px;
}

/* 关于我们 */
.about-section {
    padding: 120px 0;
    background: white;
}

.section-title {
    font-size: 42px;
    font-weight: 300;
    margin-bottom: 60px;
    color: var(--text-dark);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.about-text {
    font-size: 16px;
    line-height: 2;
    color: var(--text-light);
    margin-bottom: 40px;
}

.btn-secondary {
    display: inline-block;
    padding: 12px 40px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(33, 150, 243, 0.3);
}

.video-wrapper {
    margin-top: 60px;
}

.video-placeholder {
    width: 80%;
    height: 350px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.video-placeholder::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: url('../../images/tmtp1.png') center/cover;
}

.play-button {
    width: 70px;
    height: 70px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    color: var(--primary-color);
    z-index: 1;
    transition: all 0.3s;
}

.video-placeholder:hover .play-button {
    transform: scale(1.1);
    background: white;
}

.video-caption {
    text-align: center;
    margin-top: 15px;
    color: var(--text-light);
}

.company-image {
    width: 100%;
    height: 600px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

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

/* 新闻资讯 */
.news-section {
    padding: 120px 0;
    background: var(--bg-light);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 60px;
}

.more-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 400;
    position: relative;
    padding: 10px 24px;
    border: 1px solid var(--primary-color);
    border-radius: 25px;
}

.more-link::after {
    content: '›';
    font-size: 18px;
    transition: transform 0.3s;
}

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

.more-link:hover::after {
    transform: translateX(3px);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.news-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
}

.news-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.news-image {
    width: 100%;
    height: 280px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.news-content {
    padding: 30px;
}

.news-date {
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 15px;
}

.news-title {
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: 15px;
    color: var(--text-dark);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-excerpt {
    color: var(--text-light);
    font-size: 14px;
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 页脚 */
.footer {
    background: var(--bg-dark);
    color: #999;
    padding: 80px 0 30px;
    position: relative;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.footer-column h4 {
    color: white;
    margin-bottom: 20px;
    font-size: 16px;
}

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

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

.footer-column a {
    color: #999;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

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

.footer-contact p {
    margin-bottom: 15px;
    font-size: 14px;
}

.qr-code {
    margin-top: 30px;
    text-align: center;
}

.qr-code img {
    width: 120px;
    height: 120px;
    background: white;
    padding: 10px;
    border-radius: 5px;
}

.qr-code p {
    margin-top: 10px;
    font-size: 12px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    font-size: 14px;
    color: #666;
}

.back-to-top {
    position: fixed;
    bottom: 50px;
    right: 50px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    opacity: 0;
    transition: all 0.3s;
    font-size: 24px;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
}

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-5px);
}

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

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

/* 响应式设计 - 平板 */
@media (max-width: 1024px) {
    .container {
        padding: 0 40px;
    }
    
    .header .container {
        padding: 15px 40px;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .carousel-arrow {
        width: 50px;
        height: 50px;
        font-size: 32px;
    }
    
    .carousel-prev {
        left: 20px;
    }
    
    .carousel-next {
        right: 20px;
    }
    
    .about-content {
        gap: 50px;
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* 响应式设计 - 移动端 */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .header .container {
        padding: 12px 20px;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        padding: 30px;
        transition: left 0.3s;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    }
    
    .nav.active {
        left: 0;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 20px;
        width: 100%;
    }
    
    .nav-menu li {
        width: 100%;
        text-align: center;
    }
    
    .nav-menu a {
        display: block;
        padding: 15px;
        font-size: 18px;
    }
    
    /* 移动端搜索框样式 */
    .search-box-content {
        max-width: calc(100% - 40px);
        padding: 0 20px;
        height: 50px;
        margin: 0 20px;
        gap: 15px;
    }

    .search-input {
        font-size: 15px;
    }

    .search-box-icon {
        height: 18px;
    }

    .search-btn {
        padding: 8px 20px;
        font-size: 14px;
    }

    .search-close {
        width: 32px;
        height: 32px;
        font-size: 22px;
    }
    
    /* 移动端轮播样式 */
    .carousel-arrow {
        width: 40px;
        height: 40px;
        font-size: 24px;
    }
    
    .carousel-prev {
        left: 10px;
    }
    
    .carousel-next {
        right: 10px;
    }
    
    .carousel-indicators {
        bottom: 80px;
        gap: 10px;
    }
    
    .carousel-indicators .indicator {
        width: 8px;
        height: 8px;
    }
    
    .carousel-indicators .indicator.active {
        width: 20px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }

    /* 移动端下拉菜单样式 */
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: linear-gradient(135deg, rgba(27, 81, 190, 0.05) 0%, rgba(14, 90, 167, 0.03) 100%);
        margin: 10px 0 0 20px;
        border-radius: 8px;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        padding: 0;
        border: 1px solid rgba(27, 81, 190, 0.1);
    }
    
    /* 隐藏移动端箭头装饰 */
    .dropdown-menu::before {
        display: none;
    }
    
    .nav-item:hover .dropdown-menu,
    .nav-item .dropdown-menu.show {
        max-height: 400px;
        padding: 8px 0;
    }
    
    .dropdown-menu li::after {
        display: block;
    }
    
    .dropdown-menu a {
        padding: 12px 18px;
        font-size: 15px;
        color: #2c3e50 !important;
        font-weight: 500;
        text-decoration: none;
        display: flex;
        align-items: center;
    }
    
    .dropdown-menu a::before {
        display: none;
    }
    
    .dropdown-menu a::after {
        font-size: 16px;
        right: 15px;
    }
    
    .dropdown-menu a:hover {
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        color: white !important;
        transform: none;
        text-decoration: none;
        padding-left: 22px;
        box-shadow: 0 2px 8px rgba(27, 81, 190, 0.2);
    }
    
    .dropdown-menu a:hover::after {
        opacity: 1;
        transform: translateX(0);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-title {
        font-size: 32px;
        letter-spacing: 4px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 32px;
        margin-bottom: 40px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .company-image {
        height: 300px;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    
    .footer-contact {
        grid-column: 1 / -1;
    }
    
    .back-to-top {
        bottom: 30px;
        right: 30px;
        width: 45px;
        height: 45px;
    }
}

/* 超小屏幕 */
@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .btn-primary {
        padding: 12px 35px;
        font-size: 14px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .about-text {
        font-size: 15px;
    }
    
    .news-title {
        font-size: 16px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* 保持1920宽度的视觉比例 */
@media (min-width: 1921px) {
    .container {
        max-width: 1920px;
    }
}

/* 图片查看器 Lightbox */
.image-lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.image-lightbox.active {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.lightbox-content {
    position: relative;
    width: 95%;
    height: 95%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image {
    width: 1400px;
    height: auto;
    max-width: 95vw;
    max-height: 95vh;
    object-fit: contain;
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.8);
    border-radius: 8px;
    animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
    from {
        transform: scale(0.8);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid white;
    color: white;
    font-size: 36px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    line-height: 1;
    font-weight: 300;
    z-index: 10;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

/* 可查看图片的鼠标指针 */
.viewable-image {
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.viewable-image::after {
    content: '🔍';
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.viewable-image:hover::after {
    opacity: 1;
}

.viewable-image:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* 平板适配 */
@media (max-width: 1200px) {
    .lightbox-image {
        width: 1000px;
    }
}

/* 移动端适配 */
@media (max-width: 768px) {
    .lightbox-close {
        top: 10px;
        right: 10px;
        width: 45px;
        height: 45px;
        font-size: 28px;
    }
    
    .lightbox-image {
        width: 700px;
        max-height: 90vh;
    }
    
    .viewable-image::after {
        width: 30px;
        height: 30px;
        font-size: 14px;
    }
}

/* 小屏手机适配 */
@media (max-width: 480px) {
    .lightbox-image {
        width: 500px;
    }
}