* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
    background: #f8f9fa;
    color: #333;
    min-height: 100vh;
}

/* 导航栏容器 */
.navbar-container {
    background: #fff;
    box-shadow: 0 2px 25px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

/* 主容器 - 自适应宽度 */
.nav-main-wrapper {
    max-width: 1800px;
    min-width: 320px;
    margin: 0 auto;
    padding: 0 20px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

/* Logo区域 - 左右排列 */
.logo-wrapper {
    flex: 0 0 auto;
    min-width: 180px;
    display: flex;
    align-items: center;
}

.logo-link {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
}

.logo-link:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* Logo图片容器 - 固定大小 */
.logo-img-container {
    width: 173px; /* 60px + 3cm (113px) */
    height: 60px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-img {
    width: auto;
    height: auto;
    max-width: 95%;
    max-height: 95%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.logo-link:hover .logo-img {
    transform: scale(1.05);
}

.logo-text-container {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
}

.logo-chinese {
    font-size: 16px;
    font-weight: 500;
    color: #333;
    letter-spacing: 1px;
    line-height: 1.2;
    margin-top: 2px;
}

.logo-english {
    font-size: 14px;
    font-weight: 700;
    color: #0070F3;
    letter-spacing: 1.5px;
    line-height: 1.2;
}

/* 主导航菜单容器 - 弹性自适应 */
.nav-menu-container {
    flex: 1 1 auto;
    min-width: 0;
    height: 100%;
}

/* 一级菜单 */
.nav-level-1 {
    list-style: none;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 0;
    margin: 0;
    height: 100%;
}

.menu-item-l1 {
    flex: 1 1 auto;
    min-width: 90px;
    max-width: 160px;
    position: relative;
    text-align: center;
}

.menu-item-l1 > a {
    display: block;
    padding: 0 15px;
    color: #333;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    height: 80px;
    line-height: 80px;
    transition: all 0.3s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    position: relative;
}

.menu-item-l1 > a:hover {
    color: #0070F3;
    background: rgba(0, 112, 243, 0.03);
}

/* 一级菜单下划线 */
.menu-item-l1 > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 15%;
    width: 70%;
    height: 3px;
    background: #0070F3;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
    border-radius: 2px;
}

.menu-item-l1 > a:hover::after,
.menu-item-l1.active > a::after {
    transform: scaleX(1);
}

/* 二级菜单容器 */
.submenu-l2 {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: #fff;
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
    border-radius: 0 0 8px 8px;
    padding: 15px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
}

.menu-item-l1:hover .submenu-l2 {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 二级菜单项 */
.submenu-l2 li {
    list-style: none;
    position: relative;
}

.menu-item-l2 > a {
    display: block;
    padding: 12px 25px;
    color: #555;
    text-decoration: none;
    font-size: 14.5px;
    font-weight: 500;
    transition: all 0.2s;
    position: relative;
    border-left: 3px solid transparent;
}

.menu-item-l2 > a:hover {
    color: #0070F3;
    background: rgba(0, 112, 243, 0.05);
    border-left-color: #0070F3;
    padding-left: 30px;
}

/* 三级菜单容器 */
.submenu-l3 {
    position: absolute;
    left: 100%;
    top: -15px;
    min-width: 220px;
    background: #fff;
    box-shadow: 8px 8px 50px rgba(0, 0, 0, 0.15);
    border-radius: 0 8px 8px 8px;
    padding: 15px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateX(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
}

.menu-item-l2:hover .submenu-l3 {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

/* 三级菜单项 */
.submenu-l3 li {
    list-style: none;
}

.menu-item-l3 > a {
    display: block;
    padding: 10px 25px;
    color: #666;
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 400;
    transition: all 0.2s;
}

.menu-item-l3 > a:hover {
    color: #0070F3;
    background: rgba(0, 112, 243, 0.05);
    padding-left: 30px;
}

/* 菜单指示箭头 */
.has-submenu > a::after {
    content: '▾';
    display: inline-block;
    font-size: 12px;
    margin-left: 6px;
    opacity: 0.6;
    transition: transform 0.3s;
}

.has-submenu:hover > a::after {
    transform: rotate(180deg);
}

.menu-item-l2.has-submenu > a::after {
    content: '▶';
    font-size: 10px;
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
}

.menu-item-l2.has-submenu:hover > a::after {
    transform: translateY(-50%) rotate(90deg);
}

/* 右侧工具区域 */
.nav-tools-wrapper {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    gap: 20px;
    min-width: 120px;
}

/* 语言切换 */
.language-switcher {
    display: flex;
    align-items: center;
    gap: 6px;
    padding-right: 20px;
    border-right: 1px solid #e8e8e8;
}

.lang-option {
    color: #666;
    text-decoration: none;
    font-size: 14px;
    padding: 4px 8px;
    border-radius: 3px;
    transition: all 0.2s;
    cursor: pointer;
    background: none;
    border: none;
    white-space: nowrap;
}

.lang-option:hover {
    color: #0070F3;
    background: rgba(0, 112, 243, 0.05);
}

.lang-option.active {
    color: #0070F3;
    font-weight: 600;
}

/* 搜索按钮 */
.search-button {
    color: #666;
    font-size: 16px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
}

.search-button:hover {
    color: #0070F3;
    background: rgba(0, 112, 243, 0.05);
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: #333;
    cursor: pointer;
    padding: 10px;
    border-radius: 4px;
    transition: all 0.2s;
}

.mobile-menu-toggle:hover {
    background: rgba(0, 0, 0, 0.05);
}

/* 响应式断点设计 */

/* 大屏幕 (1600px+) */
@media (min-width: 1600px) {
    .nav-main-wrapper {
        padding: 0 40px;
        gap: 60px;
        height: 80px;
    }
    
    .menu-item-l1 > a {
        font-size: 16px;
        padding: 0 20px;
        height: 80px;
        line-height: 80px;
    }
    
    .logo-wrapper {
        min-width: 190px;
    }
    
    .logo-img-container {
        width: 193px; /* 80px + 3cm (113px) */
        height: 60px;
    }
    
    .submenu-l2 { min-width: 240px; }
    .submenu-l3 { min-width: 240px; }
}

/* 中等屏幕 (1200px-1599px) */
@media (min-width: 1200px) and (max-width: 1599px) {
    .nav-main-wrapper {
        gap: 40px;
        height: 80px;
    }
    
    .menu-item-l1 > a {
        font-size: 15px;
        padding: 0 16px;
        height: 80px;
        line-height: 80px;
    }
    
    .logo-wrapper {
        min-width: 180px;
    }
    
    .logo-img-container {
        width: 173px; /* 60px + 3cm (113px) */
        height: 60px;
    }
}

/* 小屏幕 (992px-1199px) */
@media (min-width: 992px) and (max-width: 1199px) {
    .nav-main-wrapper {
        gap: 30px;
        padding: 0 15px;
        height: 80px;
    }
    
    .menu-item-l1 > a {
        font-size: 14px;
        padding: 0 12px;
        height: 80px;
        line-height: 80px;
    }
    
    .menu-item-l1 {
        min-width: 80px;
        max-width: 140px;
    }
    
    .logo-wrapper {
        min-width: 170px;
    }
    
    .logo-img-container {
        width: 163px; /* 50px + 3cm (113px) */
        height: 50px;
    }
    
    .submenu-l2 { min-width: 200px; }
    .submenu-l3 { min-width: 200px; }
    
    .menu-item-l2 > a {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .menu-item-l3 > a {
        padding: 8px 20px;
        font-size: 13px;
    }
}

/* 平板 (768px-991px) */
@media (min-width: 768px) and (max-width: 991px) {
    .nav-main-wrapper {
        gap: 20px;
        padding: 0 12px;
        height: 70px;
    }
    
    .menu-item-l1 {
        min-width: 70px;
        max-width: 120px;
    }
    
    .menu-item-l1 > a {
        font-size: 13px;
        padding: 0 8px;
        height: 70px;
        line-height: 70px;
    }
    
    .logo-wrapper {
        min-width: 160px;
    }
    
    .logo-link {
        gap: 10px;
    }
    
    .logo-img-container {
        width: 158px; /* 45px + 3cm (113px) */
        height: 45px;
    }
    
    .nav-tools-wrapper {
        gap: 15px;
        min-width: 110px;
    }
    
    .language-switcher {
        padding-right: 15px;
        gap: 4px;
    }
    
    .lang-option {
        font-size: 13px;
        padding: 3px 6px;
    }
}

/* 移动端适配 (<=767px) */
@media (max-width: 767px) {
    .nav-main-wrapper {
        height: 60px;
        padding: 0 10px;
        gap: 10px;
    }
    
    .mobile-menu-toggle {
        display: block;
        order: 3;
    }
    
    .logo-wrapper {
        flex: 0 0 auto;
        min-width: 150px;
    }
    
    .logo-link {
        gap: 8px;
    }
    
    .logo-img-container {
        width: 153px; /* 40px + 3cm (113px) */
        height: 40px;
    }
    
    .nav-tools-wrapper {
        order: 2;
        min-width: auto;
        gap: 10px;
    }
    
    /* 移动端菜单样式 */
    .nav-menu-container {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        border-top: 1px solid #eee;
        max-height: 80vh;
        overflow-y: auto;
        z-index: 999;
    }
    
    .nav-menu-container.active {
        display: block;
    }
    
    .nav-level-1 {
        flex-direction: column;
        gap: 0;
        padding: 10px 0;
    }
    
    .menu-item-l1 {
        min-width: 100%;
        max-width: 100%;
        text-align: left;
        border-bottom: 1px solid #f5f5f5;
    }
    
    .menu-item-l1 > a {
        height: auto;
        line-height: 1.5;
        padding: 15px 20px;
        font-size: 16px;
        white-space: normal;
        text-align: left;
    }
    
    .menu-item-l1 > a::after {
        display: none;
    }
    
    .has-submenu > a::after {
        float: right;
        transform: rotate(0deg) !important;
    }
    
    /* 移动端二级菜单 */
    .submenu-l2 {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding: 0;
        display: none;
        background: rgba(0, 112, 243, 0.02);
        border-left: 3px solid rgba(0, 112, 243, 0.1);
        margin: 5px 20px;
        border-radius: 4px;
        min-width: auto;
        max-width: 100%;
    }
    
    .menu-item-l1.active .submenu-l2 {
        display: block;
    }
    
    .menu-item-l2 > a {
        padding: 12px 20px 12px 30px;
        border-bottom: 1px solid rgba(0, 0, 0, 0.03);
        font-size: 15px;
        border-left: none;
    }
    
    .menu-item-l2 > a:hover {
        padding-left: 35px;
    }
    
    /* 移动端三级菜单 */
    .submenu-l3 {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding: 0;
        display: none;
        background: rgba(0, 112, 243, 0.01);
        border-left: 3px solid rgba(0, 112, 243, 0.05);
        margin: 5px 10px 5px 30px;
        border-radius: 4px;
    }
    
    .menu-item-l2.active .submenu-l3 {
        display: block;
    }
    
    .menu-item-l3 > a {
        padding: 10px 20px 10px 40px;
        font-size: 14px;
    }
    
    .menu-item-l3 > a:hover {
        padding-left: 45px;
    }
    
    .menu-item-l2.has-submenu > a::after {
        position: static;
        float: right;
        transform: none !important;
    }
    
    .language-switcher {
        padding-right: 0;
        border-right: none;
        justify-content: center;
        padding: 15px 20px;
        border-top: 1px solid #eee;
    }
}

/* 超小屏幕 (<=480px) */
@media (max-width: 480px) {
    .nav-main-wrapper {
        height: 56px;
    }
    
    .logo-wrapper {
        min-width: 140px;
    }
    
    .logo-img-container {
        width: 149px; /* 36px + 3cm (113px) */
        height: 36px;
    }
    
    .menu-item-l1 > a {
        padding: 12px 15px;
        font-size: 15px;
    }
    
    .lang-option {
        font-size: 13px;
        padding: 2px 5px;
    }
    
    .search-button {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
}

/* 轮播图基础样式 */
.carousel-section {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    background: white;
    margin: 0;
}

.carousel-container {
    position: relative;
    width: 100%;
    max-width: 100vw;
    margin: 0 auto;
}

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

/* 幻灯片容器 */
.carousel-slides {
    display: flex;
    width: 300%; /* 3张幻灯片 */
    height: auto;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

/* 单个幻灯片 */
.carousel-slide {
    position: relative;
    flex: 0 0 33.333333%;
    width: 100%;
    min-height: 554px; /* 原400px + 4CM(154px) */
    display: flex;
    flex-direction: column;
}

/* 图片容器 */
.slide-image-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

/* 使用CSS渐变作为图片占位符 */
.slide-image-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
    opacity: 0.8;
    z-index: 1;
}

.slide-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.5s ease;
    position: relative;
    z-index: 2;
    display: block;
}

/* 为演示创建渐变背景，替代实际图片 */
.carousel-slide:nth-child(1) .slide-image-container::before {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.carousel-slide:nth-child(2) .slide-image-container::before {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.carousel-slide:nth-child(3) .slide-image-container::before {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.carousel-slide.active .slide-image {
    transform: scale(1.02);
}

/* 内容区域 */
.slide-content {
    position: relative;
    z-index: 3;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    padding: 2rem;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.7) 0%, rgba(0, 0, 0, 0.4) 50%, transparent 100%);
}

.content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    color: white;
}

/* 响应式标题 */
.slide-content h2 {
    font-size: clamp(1.8rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.4);
}

/* 响应式段落 */
.slide-content p {
    font-size: clamp(1rem, 2vw, 1.2rem);
    margin-bottom: 2rem;
    line-height: 1.6;
    max-width: 600px;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.4);
}

/* 按钮样式 */
.slide-btn {
    display: inline-block;
    padding: clamp(0.75rem, 2vw, 1rem) clamp(1.5rem, 4vw, 2rem);
    background-color: #fff;
    color: #2c3e50;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: clamp(0.9rem, 2vw, 1rem);
    border: 2px solid #fff;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.slide-btn:hover,
.slide-btn:focus {
    background-color: transparent;
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

/* 轮播导航按钮 */
.carousel-nav {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 clamp(1rem, 3vw, 2rem);
    z-index: 10;
    pointer-events: none;
}

.carousel-nav-btn {
    pointer-events: auto;
    width: clamp(40px, 6vw, 50px);
    height: clamp(40px, 6vw, 50px);
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.9);
    background: rgba(0, 0, 0, 0.4);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    font-size: clamp(1rem, 3vw, 1.2rem);
    backdrop-filter: blur(4px);
}

.carousel-nav-btn:hover,
.carousel-nav-btn:focus {
    background: rgba(0, 0, 0, 0.7);
    border-color: white;
    transform: scale(1.15);
    outline: none;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

/* 轮播指示器 */
.carousel-controls {
    position: absolute;
    bottom: clamp(1rem, 4vw, 2rem);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: clamp(0.5rem, 2vw, 1rem);
    z-index: 10;
}

.carousel-indicator {
    width: clamp(10px, 3vw, 12px);
    height: clamp(10px, 3vw, 12px);
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.6);
    border: none;
    cursor: pointer;
    padding: 0;
    transition: all 0.3s ease;
}

.carousel-indicator:hover,
.carousel-indicator:focus {
    background-color: rgba(255, 255, 255, 0.9);
    transform: scale(1.4);
    outline: none;
}

.carousel-indicator.active {
    background-color: white;
    transform: scale(1.4);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

/* 响应式断点 */
@media (max-width: 1024px) {
    .carousel-slide {
        min-height: 604px; /* 原450px + 4CM(154px) */
    }
    
    .slide-content {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .carousel-slide {
        min-height: 554px; /* 原400px + 4CM(154px) */
    }
    
    .slide-content {
        padding: 1.5rem;
        background: linear-gradient(to right, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.6) 100%);
    }
    
    .slide-content h2 {
        font-size: 1.8rem;
        margin-bottom: 0.8rem;
    }
    
    .slide-content p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
        max-width: 500px;
    }
}

@media (max-width: 576px) {
    .carousel-slide {
        min-height: 504px; /* 原350px + 4CM(154px) */
    }
    
    .slide-content {
        padding: 1rem;
        justify-content: center;
        text-align: center;
    }
    
    .slide-content h2 {
        font-size: 1.5rem;
    }
    
    .slide-content p {
        font-size: 0.9rem;
        max-width: 100%;
    }
    
    .content-wrapper {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .carousel-controls {
        bottom: 1rem;
    }
    
    .carousel-nav {
        display: flex;
    }
}

@media (max-width: 400px) {
    .carousel-slide {
        min-height: 454px; /* 原300px + 4CM(154px) */
    }
    
    .carousel-nav {
        display: none;
    }
}

/* 大屏幕优化 */
@media (min-width: 1200px) {
    .carousel-slide {
        min-height: 654px; /* 原500px + 4CM(154px) */
    }
    
    .slide-content {
        padding: 3rem;
    }
}

@media (min-width: 1600px) {
    .carousel-slide {
        min-height: 704px; /* 原550px + 4CM(154px) */
    }
}

/* LOGO上传和预览区域 */
.logo-upload-section {
    max-width: 1400px;
    margin: 40px auto;
    padding: 0 20px;
}

.upload-container {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
}

.upload-title {
    font-size: 24px;
    color: #333;
    margin-bottom: 25px;
    font-weight: 600;
    text-align: center;
}

.upload-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.upload-card {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid #0070F3;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-icon {
    font-size: 20px;
}

.card-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.upload-area {
    border: 2px dashed #ddd;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #fff;
}

.upload-area:hover {
    border-color: #0070F3;
    background: rgba(0, 112, 243, 0.02);
}

.upload-icon {
    font-size: 48px;
    color: #999;
    margin-bottom: 15px;
}

.upload-text {
    color: #666;
    font-size: 16px;
    margin-bottom: 10px;
}

.upload-hint {
    color: #999;
    font-size: 14px;
}

#logoUpload {
    display: none;
}

.logo-preview {
    margin-top: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #eee;
}

.preview-title {
    font-size: 16px;
    color: #666;
    margin-bottom: 15px;
    font-weight: 600;
}

.preview-container {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 15px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
}

.preview-img-container {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
    border: 1px solid #eee;
}

.preview-img {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
}

.preview-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.preview-chinese {
    font-size: 22px;
    font-weight: 700;
    color: #333;
}

.preview-english {
    font-size: 16px;
    font-weight: 700;
    color: #0070F3;
    margin-top: 3px;
}

.upload-btn {
    display: inline-block;
    padding: 12px 24px;
    background: #0070F3;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.upload-btn:hover {
    background: #cc000f;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 112, 243, 0.2);
}

.logo-gallery {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.gallery-item {
    width: 60px;
    height: 60px;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.gallery-item.active {
    border-color: #0070F3;
    box-shadow: 0 5px 15px rgba(0, 112, 243, 0.2);
}

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

/* 解决方案区域样式 */
:root {
    --primary-color: #1e293b;
    --secondary-color: #3b82f6;
    --background-color: #f8fafc;
    --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    --card-hover-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.main-container {
    width: 100%;
    max-width: 1400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: clamp(20px, 6vh, 60px) 0;
    gap: clamp(30px, 8vh, 70px);
    margin: calc(-4cm + 2cm) auto 0;
}

.header {
    text-align: center;
    width: 100%;
    padding: 0;
    margin-top: 2cm;
}

.main-title {
    font-size: clamp(1.5rem, 5vw, 2.8rem);
    color: var(--primary-color);
    font-weight: 800;
    letter-spacing: -0.5px;
    line-height: 1.3;
    text-align: center;
    max-width: 100%;
    margin: 0 auto;
    padding: 0;
    background: linear-gradient(135deg, #1e293b 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: normal;
    word-break: break-word;
    overflow: visible;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
    gap: clamp(25px, 5vw, 45px);
    width: 100%;
    max-width: 1400px;
    margin: 0 auto 0;
    padding: 0 clamp(20px, 5vw, 60px);
    box-sizing: border-box;
    justify-items: center;
}

.solution-card {
    border-radius: clamp(12px, 3vw, 20px);
    overflow: hidden;
    box-shadow: 0 clamp(8px, 1.5vw, 15px) clamp(20px, 3vw, 35px) rgba(0, 0, 0, 0.25);
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    cursor: pointer;
    aspect-ratio: 3 / 4;
    width: 100%;
    max-width: min(400px, 100%);
    min-width: 0;
    position: relative;
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(255, 255, 255, 0.1);
    will-change: transform, box-shadow, opacity;
    opacity: 0;
    transform: translateY(50px) scale(0.9);
    animation: cardSlideIn 0.8s ease forwards;
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(10px);
    /* 响应式高度，根据宽度自动调整 */
    height: auto;
    min-height: clamp(300px, 50vh, 450px);
    max-height: clamp(450px, 70vh, 600px);
}

/* 依次入场动画 */
.solution-card:nth-child(1) { animation-delay: 0.1s; }
.solution-card:nth-child(2) { animation-delay: 0.2s; }
.solution-card:nth-child(3) { animation-delay: 0.3s; }

/* 所有解决方案卡片高度增加2CM（2CM ≈ 75.2px） */
.solution-card {
    /* 在原有高度基础上增加2CM */
    min-height: clamp(calc(300px + 75.2px), calc(50vh + 75.2px), calc(450px + 75.2px));
    max-height: clamp(calc(450px + 75.2px), calc(70vh + 75.2px), calc(600px + 75.2px));
}

/* 半屏状态下解决方案卡片高度优化 */
@media screen and (max-aspect-ratio: 1/1) {
    .solution-card {
        min-height: clamp(calc(250px + 75.2px), calc(45vh + 75.2px), calc(350px + 75.2px));
        max-height: clamp(calc(350px + 75.2px), calc(60vh + 75.2px), calc(500px + 75.2px));
    }
}

/* 横屏手机下解决方案卡片高度优化 */
@media screen and (max-height: 600px) and (max-width: 900px) {
    .solution-card {
        min-height: clamp(calc(150px + 75.2px), calc(50vh + 75.2px), calc(250px + 75.2px));
        max-height: clamp(calc(250px + 75.2px), calc(70vh + 75.2px), calc(350px + 75.2px));
    }
}

/* 半屏状态优化 - 根据可用高度调整 */
@media screen and (max-aspect-ratio: 1/1) {
    .solution-grid {
        grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr));
        gap: clamp(20px, 4vw, 35px);
    }
    
    .solution-card {
        aspect-ratio: 2 / 3;
        min-height: clamp(250px, 45vh, 350px);
        max-height: clamp(350px, 60vh, 500px);
    }
}

/* 横屏手机优化 */
@media screen and (max-height: 600px) and (max-width: 900px) {
    .solution-grid {
        grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr));
        gap: clamp(15px, 3vw, 25px);
    }
    
    .solution-card {
        aspect-ratio: 4 / 3;
        min-height: clamp(150px, 50vh, 250px);
        max-height: clamp(250px, 70vh, 350px);
    }
}

@keyframes cardSlideIn {
    0% {
        opacity: 0;
        transform: translateY(50px) scale(0.9);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.solution-card:hover {
    transform: translateY(-20px) scale(1.05) rotateX(5deg) rotateY(5deg);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.25), 0 0 20px rgba(59, 130, 246, 0.3);
    z-index: 10;
    border-color: rgba(59, 130, 246, 0.5);
}

.card-image {
    height: 100%;
    width: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    flex: 1;
    transition: transform 0.8s cubic-bezier(0.23, 1, 0.32, 1);
    filter: brightness(0.9);
}

.solution-card:hover .card-image {
    transform: scale(1.15) translateY(-10px);
    filter: brightness(1.1);
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom, 
        rgba(0, 0, 0, 0) 0%, 
        rgba(0, 0, 0, 0.1) 30%, 
        rgba(0, 0, 0, 0.85) 100%
    );
    display: flex;
    align-items: flex-end;
    padding: clamp(18px, 4vw, 30px);
    transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
    opacity: 0.9;
}

.solution-card:hover .card-overlay {
    background: linear-gradient(
        to bottom, 
        rgba(59, 130, 246, 0.2) 0%, 
        rgba(59, 130, 246, 0.1) 30%, 
        rgba(0, 0, 0, 0.95) 100%
    );
    opacity: 1;
}

/* 添加边框发光效果 */
.solution-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: inherit;
    background: linear-gradient(45deg, #3b82f6, #10b981, #f59e0b, #ef4444);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    transform: scale(1.05);
}

.solution-card:hover::before {
    opacity: 0.3;
    animation: borderGlow 2s ease-in-out infinite alternate;
}

@keyframes borderGlow {
    0% { opacity: 0.3; }
    100% { opacity: 0.6; }
}

.card-title {
    color: white;
    font-size: clamp(1.3rem, 3.8vw, 2rem);
    font-weight: 700;
    text-shadow: 0 4px 16px rgba(0, 0, 0, 0.8);
    line-height: 1.2;
    word-break: keep-all;
    white-space: nowrap;
    letter-spacing: 0.5px;
    transform: translateY(20px);
    opacity: 0.8;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.solution-card:hover .card-title {
    transform: translateY(0) scale(1.05);
    opacity: 1;
    text-shadow: 0 8px 32px rgba(0, 0, 0, 1), 0 0 20px rgba(59, 130, 246, 0.5);
}

/* 添加悬停时的波纹效果 */
.solution-card::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(59, 130, 246, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.8s, height 0.8s;
}

.solution-card:hover::after {
    width: 300%;
    height: 300%;
}

/* 添加卡片内部的闪光效果 */
.card-image::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        to right, 
        transparent 0%, 
        rgba(255, 255, 255, 0.1) 50%, 
        transparent 100%
    );
    transform: rotate(30deg);
    transition: transform 0.8s ease;
    z-index: 2;
}

.solution-card:hover .card-image::before {
    transform: rotate(30deg) translateX(100%);
}

/* 超大桌面屏幕 (1600px以上) */
@media screen and (min-width: 1600px) {
    .main-container {
        max-width: 1600px;
    }
    
    .solution-grid {
        max-width: 1500px;
        gap: 45px;
    }
    
    .solution-card {
        height: 450px;
    }
}

/* 中等桌面屏幕 (1025px-1400px) */
@media screen and (max-width: 1400px) and (min-width: 1025px) {
    .solution-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: clamp(20px, 3vw, 30px);
    }
    
    .solution-card {
        height: clamp(250px, 35vw, 350px);
    }
}

/* 小桌面/大平板 (901px-1024px) */
@media screen and (max-width: 1024px) and (min-width: 901px) {
    .solution-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: clamp(22px, 4vw, 32px);
    }
    
    .solution-card {
        height: clamp(260px, 38vw, 320px);
    }
    
    .main-title {
        font-size: clamp(2rem, 5vw, 2.5rem);
    }
}

/* 平板设备 (601px-900px) */
@media screen and (max-width: 900px) and (min-width: 601px) {
    .main-container {
        gap: clamp(25px, 6vh, 50px);
        padding: clamp(25px, 5vh, 45px) clamp(20px, 5vw, 35px);
    }
    
    .solution-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: clamp(20px, 4vw, 28px);
    }
    
    .solution-card {
        height: clamp(200px, 42vw, 280px);
    }
    
    .main-title {
        font-size: clamp(1.8rem, 5vw, 2.3rem);
    }
}

/* 大屏手机 (426px-600px) */
@media screen and (max-width: 600px) and (min-width: 426px) {
    .main-container {
        gap: clamp(30px, 7vh, 45px);
        padding: clamp(25px, 6vh, 40px) clamp(18px, 4vw, 30px);
        justify-content: flex-start;
        min-height: auto;
    }
    
    .solution-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: clamp(18px, 4vw, 25px);
    }
    
    .solution-card {
        height: clamp(180px, 45vw, 240px);
    }
    
    .main-title {
        font-size: clamp(1.7rem, 5.5vw, 2.1rem);
        line-height: 1.3;
    }
    
    .card-title {
        font-size: clamp(1.2rem, 4vw, 1.6rem);
    }
}

/* 中屏手机 (376px-425px) */
@media screen and (max-width: 425px) and (min-width: 376px) {
    .main-container {
        padding: clamp(20px, 5vh, 35px) clamp(15px, 3vw, 25px);
        gap: clamp(25px, 6vh, 40px);
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
        gap: clamp(20px, 5vw, 28px);
        max-width: 380px;
    }
    
    .solution-card {
        height: clamp(190px, 55vw, 220px);
        max-height: 250px;
    }
    
    .main-title {
        font-size: clamp(1.6rem, 6vw, 1.9rem);
        margin-bottom: 5px;
    }
}

/* 小屏手机 (321px-375px) */
@media screen and (max-width: 375px) and (min-width: 321px) {
    .main-container {
        padding: clamp(18px, 4vh, 30px) clamp(12px, 3vw, 20px);
        gap: clamp(22px, 5vh, 35px);
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
        gap: clamp(18px, 4vw, 24px);
        max-width: 340px;
    }
    
    .solution-card {
        height: clamp(170px, 60vw, 200px);
    }
    
    .main-title {
        font-size: clamp(1.5rem, 6.5vw, 1.8rem);
        line-height: 1.25;
    }
    
    .card-title {
        font-size: clamp(1.1rem, 4.5vw, 1.4rem);
    }
}

/* 超小屏手机 (320px及以下) */
@media screen and (max-width: 320px) {
    .main-container {
        padding: 15px 12px;
        gap: 25px;
        justify-content: flex-start;
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        max-width: 300px;
    }
    
    .solution-card {
        height: 160px;
        border-radius: 12px;
    }
    
    .main-title {
        font-size: 1.4rem;
        line-height: 1.3;
    }
    
    .card-title {
        font-size: 1.2rem;
    }
    
    .card-overlay {
        padding: 15px;
    }
}

/* 横屏模式适配 */
@media screen and (orientation: landscape) {
    .main-container {
        padding: clamp(15px, 4vh, 30px) clamp(15px, 4vw, 40px);
        gap: clamp(20px, 5vh, 40px);
    }
    
    /* 横屏手机 */
    @media screen and (max-height: 600px) and (max-width: 900px) {
        .solution-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: clamp(15px, 3vw, 22px);
        }
        
        .solution-card {
            height: clamp(150px, 60vh, 200px);
        }
        
        .main-title {
            font-size: clamp(1.5rem, 4vw, 1.9rem);
            margin-bottom: 10px;
        }
    }
    
    /* 横屏平板 */
    @media screen and (min-height: 601px) and (max-height: 800px) {
        .solution-card {
            height: clamp(200px, 50vh, 280px);
        }
    }
}

/* 高分辨率屏幕适配 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .solution-card {
        border: 0.5px solid rgba(255, 255, 255, 0.15);
    }
}

/* 触屏设备优化 */
@media (hover: none) and (pointer: coarse) {
    .solution-card {
        cursor: pointer;
    }
    
    .solution-card:active {
        transform: translateY(-8px) scale(1.01);
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
        transition: transform 0.2s ease, box-shadow 0.2s ease;
    }
    
    .solution-card:hover {
        transform: none;
        box-shadow: var(--card-shadow);
    }
}

/* 弱网环境优化 - 减少动画 */
@media (prefers-reduced-motion: reduce) {
    .solution-card,
    .solution-card:hover,
    .card-image,
    .card-overlay,
    .card-title {
        transition: none !important;
        transform: none !important;
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    :root {
        --background-color: #0f172a;
        --primary-color: #f1f5f9;
        --card-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
        --card-hover-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    }
    
    body {
        background-color: var(--background-color);
    }
    
    .main-title {
        background: linear-gradient(135deg, #f1f5f9 0%, #60a5fa 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
}

/* 超大高度屏幕适配 */
@media screen and (min-height: 1000px) {
    .main-container {
        justify-content: center;
        min-height: 100vh;
    }
    
    .solution-card {
        height: clamp(250px, 40vh, 350px);
    }
}

/* 打印样式 */
@media print {
    body {
        background-color: white !important;
    }
    
    .solution-card {
        break-inside: avoid;
        box-shadow: 0 0 0 1px #ddd !important;
        height: 200px !important;
    }
    
    .solution-card:hover {
        transform: none !important;
        box-shadow: 0 0 0 1px #ddd !important;
    }
}

/* =========================================
   页脚样式 (Footer Styles)
   ========================================= */

.site-footer {
    background-color: #1e293b;
    color: #e2e8f0;
    padding: clamp(40px, 5vw, 60px) 0 0;
    margin-top: clamp(60px, 8vh, 100px);
    font-size: 14px;
    position: relative;
    z-index: 10;
}

.footer-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 clamp(20px, 5vw, 60px);
    box-sizing: border-box;
}

/* 上部布局 */
.footer-top {
    margin-bottom: 40px;
}

.footer-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: clamp(20px, 4vw, 40px);
}

.footer-col {
    flex: 1;
    min-width: 200px;
}

/* 关注IANTECH栏目特殊处理 */
.follow-col {
    flex: 1.5;
    min-width: 250px;
    max-width: 300px;
}

/* 标题样式 */
.footer-title {
    color: #fff;
    font-size: clamp(15px, 1.1vw, 16px);
    font-weight: 600;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 30px;
    height: 2px;
    background: #3b82f6;
}

/* 社交媒体图标 */
.social-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.social-link {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    flex-shrink: 0;
}

.social-link:hover {
    background: #3b82f6;
    transform: translateY(-3px);
}

/* 微信二维码弹窗 */
.qr-popup {
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    width: clamp(100px, 10vw, 120px);
    background: #fff;
    padding: 8px;
    border-radius: 6px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    text-align: center;
    pointer-events: none;
    z-index: 100;
}

.qr-popup::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: #fff;
}

.qr-popup img {
    width: 100%;
    height: auto;
    display: block;
    margin-bottom: 5px;
    border-radius: 3px;
}

.qr-popup span {
    color: #333;
    font-size: clamp(10px, 0.8vw, 12px);
    display: block;
    line-height: 1.3;
}

.social-link:hover .qr-popup {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* 链接列表 */
.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: clamp(8px, 1.5vh, 12px);
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease, padding-left 0.3s ease;
    display: inline-block;
    font-size: clamp(13px, 0.95vw, 14px);
}

.footer-links a:hover {
    color: #3b82f6;
    padding-left: 5px;
}

/* 联系方式列表 */
.contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: clamp(12px, 1.5vh, 15px);
    color: #94a3b8;
    line-height: 1.5;
    font-size: clamp(13px, 0.95vw, 14px);
}

.contact-list li i {
    color: #3b82f6;
    margin-top: 3px;
    flex-shrink: 0;
    font-size: 14px;
}

/* 分割线 */
.footer-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    width: 100%;
    margin-bottom: 25px;
}

/* 底部区域 */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: clamp(25px, 4vw, 30px);
    flex-wrap: wrap;
    gap: 15px;
}

.copyright p {
    color: #64748b;
    font-size: clamp(12px, 0.9vw, 13px);
    line-height: 1.4;
}

.legal-links {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.legal-links a {
    color: #64748b;
    text-decoration: none;
    font-size: clamp(12px, 0.9vw, 13px);
    transition: color 0.3s ease;
    white-space: nowrap;
}

.legal-links a:hover {
    color: #3b82f6;
}

.separator {
    color: #475569;
    font-size: 12px;
}

/* =========================================
   响应式调整
   ========================================= */

/* 平板设备 (768px - 992px) */
@media (max-width: 992px) and (min-width: 768px) {
    .footer-row {
        gap: 30px;
    }
    
    .follow-col {
        flex: 1 1 40%;
        max-width: 100%;
        margin-bottom: 10px;
    }
    
    .footer-col {
        flex: 1 1 calc(50% - 30px);
        min-width: 180px;
    }
}

/* 小平板设备 (600px - 768px) */
@media (max-width: 768px) and (min-width: 600px) {
    .footer-row {
        gap: 25px;
    }
    
    .follow-col {
        flex: 1 1 100%;
        max-width: 100%;
        margin-bottom: 20px;
    }
    
    .footer-col {
        flex: 1 1 calc(50% - 25px);
        min-width: 160px;
    }
    
    .social-links {
        gap: 10px;
    }
}

/* 手机设备 (小于600px) */
@media (max-width: 600px) {
    .site-footer {
        padding: 30px 0 0;
        margin-top: 40px;
    }
    
    .footer-container {
        padding: 0 20px;
    }
    
    .footer-row {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-col {
        min-width: 100%;
        width: 100%;
    }
    
    .follow-col {
        max-width: 100%;
        text-align: center;
    }
    
    .footer-title {
        text-align: center;
    }
    
    .footer-title::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .social-links {
        justify-content: center;
        gap: 15px;
    }
    
    .social-link {
        width: 40px;
        height: 40px;
    }
    
    .qr-popup {
        left: 50%;
        transform: translateX(-50%) translateY(10px);
    }
    
    .social-link:hover .qr-popup {
        transform: translateX(-50%) translateY(0);
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        padding-bottom: 40px;
        gap: 20px;
    }
    
    .legal-links {
        justify-content: center;
    }
    
    .contact-list li {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 5px;
    }
    
    .contact-list li i {
        margin-top: 0;
        margin-bottom: 5px;
    }
    
    .footer-links {
        text-align: center;
    }
    
    .footer-links li {
        display: inline-block;
        margin: 0 15px 10px 0;
    }
    
    .footer-links li:last-child {
        margin-right: 0;
    }
}

/* 超小手机设备 (小于400px) */
@media (max-width: 400px) {
    .footer-container {
        padding: 0 15px;
    }
    
    .social-link {
        width: 36px;
        height: 36px;
    }
    
    .social-links {
        gap: 10px;
    }
    
    .footer-links li {
        margin-right: 10px;
    }
    
    .legal-links {
        flex-direction: column;
        gap: 10px;
    }
    
    .separator {
        display: none;
    }
    
    .legal-links a {
        padding: 5px 0;
    }
}

/* 横屏手机适配 */
@media (max-height: 500px) and (orientation: landscape) {
    .site-footer {
        padding: 20px 0 0;
        margin-top: 30px;
    }
    
    .footer-row {
        gap: 20px;
    }
    
    .footer-col {
        min-width: 180px;
    }
}

/* 打印优化 */
@media print {
    .site-footer {
        background: #fff;
        color: #000;
        border-top: 1px solid #ddd;
    }
    .footer-title, .footer-links a, .contact-list li, .copyright p {
        color: #000;
    }
    .qr-popup {
        display: none !important;
    }
}