* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    font-size: 1rem;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img,
video,
canvas,
svg {
    max-width: 100%;
    height: auto;
}

iframe {
    max-width: 100%;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(0.875rem, 2.5vw, 1.25rem);
}

header {
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: clamp(0.875rem, 2.5vw, 1.25rem) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: clamp(0.625rem, 2vw, 0.9375rem);
    min-width: 0;
}

.logo-img {
    height: clamp(2.5rem, 7vw, 3.75rem);
    width: auto;
    object-fit: contain;
}

.logo-text h1 {
    color: #0066cc;
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 2px;
    line-height: 1.1;
}

.logo-text p {
    color: #00a859;
    font-size: 1rem;
    line-height: 1.1;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

nav ul {
    list-style: none;
    display: flex;
    align-items: center;
}

nav ul li {
    margin-left: 1.5rem;
    position: relative;
}

nav ul li a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    text-decoration: none;
    color: #333;
    font-weight: bold;
    font-size: 1.1rem;
    transition: color 0.3s, background-color 0.15s, transform 0.08s;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

nav ul li a:hover {
    color: #0066cc;
}

nav ul li a:active {
    background-color: rgba(0, 102, 204, 0.08);
    transform: translateY(1px);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 0.5rem 0;
    min-width: 10rem;
    max-width: 90vw;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.dropdown:hover .dropdown-menu,
.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu li {
    margin: 0;
    padding: 0 1rem;
}

.dropdown-menu li a {
    display: block;
    min-height: 44px;
    display: flex;
    align-items: center;
    padding: 0.5rem 0;
    font-size: 1rem;
}

.hero {
    padding: 40px 0; /* 优化：增加内边距提升视觉空间 */
    text-align: center;
    background-color: #f9fafb; /* 优化：增加浅背景区分hero区 */
    border-radius: 8px; /* 优化：轻微圆角提升质感 */
    margin: 20px auto; /* 优化：增加上下间距 */
    max-width: 1100px; /* 优化：和轮播容器对齐 */
}

.hero h2 {
    font-size: 2.5rem; /* 优化：调整字号适配整体风格 */
    margin-bottom: 15px; /* 优化：增加标题下间距 */
    color: #20B2AA;
    position: relative;
    z-index: 10;
    line-height: 1.3; /* 优化：行高更舒适 */
}

.hero p {
    font-size: 1.15rem; /* 新增：补充hero文本样式 */
    color: #4a5568;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

section {
    padding: 40px 0; /* 优化：增加内边距提升内容呼吸感 */
}

.carousel-section {
    padding: 0;
    margin: 0;
}

.carousel-container {
    position: relative;
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 8px; /* 优化：轮播容器增加圆角 */
    box-shadow: 0 2px 8px rgba(0,0,0,0.08); /* 优化：轻微阴影提升层次 */
}

.carousel-slide {
    display: none;
    width: 100%;
    transition: opacity 1s ease-in-out;
}

.carousel-slide.active {
    display: block;
}

.carousel-slide img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.prev-btn, .next-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border-radius: 50%; /* 圆形按钮 */
    background-color: rgba(255, 255, 255, 0.8); /* 半透明白色背景 */
    color: #333; /* 箭头颜色 */
    border: none;
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15); /* 阴影增加立体感 */
    transition: all 0.3s ease; /* 过渡动画 */
    z-index: 10;
}

.prev-btn:hover, .next-btn:hover {
    background-color: rgba(0, 0, 0, 0.8);
    transform: translateY(-50%) scale(1.1); /* 优化：hover轻微放大 */
}

.prev-btn {
    left: 20px; /* 优化：按钮位置外移 */
}

.next-btn {
    right: 20px; /* 优化：按钮位置外移 */
}

.carousel-dots {
    position: absolute;
    bottom: 20px; /* 优化：圆点位置上移 */
    left: 50%;
    transform: translateX(-50%);
    display: flex;
}

.dot {
    width: 12px; /* 优化：圆点尺寸 */
    height: 12px; /* 优化：圆点尺寸 */
    background-color: rgba(255,255,255,0.7); /* 优化：圆点默认透明度 */
    border-radius: 50%;
    margin: 0 6px; /* 优化：圆点间距 */
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s; /* 优化：增加transform过渡 */
    position: relative;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.dot::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 44px;
    height: 44px;
    transform: translate(-50%, -50%);
    -webkit-transform: translate(-50%, -50%);
    border-radius: 999px;
}

.dot.active {
    background-color: #0066cc; /* 优化：激活态用品牌色 */
    transform: scale(1.2); /* 优化：激活态轻微放大 */
}

.dot:active {
    transform: scale(1.05);
}

section h2 {
    color: #0066cc;
    margin-bottom: 40px; /* 优化：增加标题下间距 */
    font-size: 2.5rem;
    text-align: center;
    position: relative; /* 新增：为装饰线做准备 */
    padding-bottom: 15px; /* 新增：标题下内边距 */
}

/* 新增：section标题底部装饰线 */
section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: #00a859;
    border-radius: 2px;
}

section p {
    margin-bottom: 20px;
    line-height: 1.8;
    font-size: 1.1rem;
    color: #4a5568; /* 优化：文本颜色更柔和 */
    max-width: 900px; /* 新增：限制文本宽度提升可读性 */
    margin-left: auto; /* 新增：文本居中 */
    margin-right: auto; /* 新增：文本居中 */
}

.device-category, .consumable-category {
    margin-bottom: 60px; /* 优化：增加分类间距 */
}

.device-category h3, .consumable-category h3 {
    color: #00a859;
    margin-bottom: 35px; /* 优化：略微增加标题下间距 */
    font-size: 1.8rem;
    text-align: center;
    position: relative;
    padding-bottom: 12px;
    display: flex; /* 新增：flex布局更精准控制对齐 */
    justify-content: center;
    align-items: center;
    gap: 15px; /* logo与文字间距 */
}

/* 新增：品牌Logo通用样式 */
.brand-logo {
    display: inline-block;
    height: 48px; /* 优化：统一高度 */
    width: auto;  /* 保持原始比例 */
    object-fit: contain;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.05)); /* 优化：轻微阴影增加层次感 */
}

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

/* 新增：分类标题底部装饰线 */
.device-category h3::after, .consumable-category h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: #0066cc;
    border-radius: 1.5px;
}

.brand-list, .product-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); /* 优化：卡片最小宽度增大 */
    gap: 30px; /* 优化：网格间距增大 */
    margin-top: 10px; /* 新增：网格上间距 */
}

.brand-item, .product-item {
    background: #ffffff; /* 优化：卡片背景改为纯白 */
    padding: 30px 20px; /* 优化：卡片内边距 */
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s; /* 优化：增加阴影过渡 */
    box-shadow: 0 2px 8px rgba(0,0,0,0.05); /* 新增：卡片轻微阴影 */
}

.brand-item:hover, .product-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.1); /* 优化：hover阴影增强 */
}

.brand-item h4, .product-item h4 {
    color: #0066cc;
    margin-bottom: 15px; /* 优化：标题下间距 */
    font-size: 1.2rem; /* 优化：标题字号 */
}

.viewable-img {
    /* 保留内联有用的属性 */
    cursor: zoom-in;
    border: 2px solid transparent;
    transition: border 0.3s, transform 0.3s;
    /* 保留外部核心属性 */
    width: 100%;
    height: clamp(9rem, 28vw, 11.25rem);
    object-fit: contain;
    margin: 5px 0 20px 0;
    border-radius: 4px;
    background: #fdfdfd;
}
.viewable-img:hover {
    border: 2px solid #007bff;
    transform: scale(1.05); /* 合并hover效果 */
}
.viewable-img:active {
    transform: scale(1.02);
}
/* ==========================
   图片查看器样式
   ========================== */
.image-viewer {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    overflow: auto; /* 允许滚动（小屏适配） */
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.close-viewer {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 2.75rem;
    height: 2.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #f1f1f1;
    font-size: 2rem;
    font-weight: bold;
    transition: 0.3s;
    cursor: pointer;
    z-index: 1010;
    border-radius: 999px;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.close-viewer:hover {
    color: #00a859;
    transform: scale(1.2);
}

.close-viewer:active {
    background: rgba(255, 255, 255, 0.08);
    transform: scale(1.05);
}

.viewer-content {
    position: relative;
    width: 90vw;
    height: 90vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.viewer-img-container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden; /* 仅在缩放时裁剪溢出 */
    cursor: grab;
}

.viewer-img-container:active {
    cursor: grabbing;
}

#fullImage {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
    transition: transform 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94), opacity 0.3s ease, border-color 0.2s ease;
    user-select: none;
    -webkit-user-drag: none;
    border: 2px solid transparent;
}

/* 拖拽时边框高亮视觉反馈 */
.image-viewer.is-dragging #fullImage {
    border-color: #00a859;
    box-shadow: 0 0 40px rgba(0, 168, 89, 0.3);
}

.viewer-loader {
    border: 5px solid #f3f3f3;
    border-top: 5px solid #0066cc;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    position: absolute;
    display: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@-webkit-keyframes spin {
    0% { -webkit-transform: rotate(0deg); }
    100% { -webkit-transform: rotate(360deg); }
}

.zoom-hint {
    position: absolute;
    bottom: -40px;
    left: 50%;
    transform: translateX(-50%);
    color: #ccc;
    font-size: 0.9rem;
    white-space: nowrap;
    display: none;
}

[data-zoom="true"] .zoom-hint {
    display: block;
}

/* 图片查看器分页/按钮样式 */
.viewer-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1020;
    transition: background 0.18s, transform 0.12s;
    -webkit-appearance: none;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.viewer-btn:hover { 
    background: rgba(255,255,255,0.14); 
    transform: translateY(-50%) scale(1.05);
} 
.viewer-prev { left: -50px; }
.viewer-next { right: -50px; }

.viewer-page-indicator {
    position: absolute;
    bottom: -35px; /* 下移避免遮挡图片 */
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.9);
    font-size: 0.95rem;
    background: rgba(0,0,0,0.28);
    padding: 6px 12px;
    border-radius: 14px;
    z-index: 1020;
}

/* 图片切换淡入淡出 */
#fullImage { 
    transition: opacity 300ms ease, transform 120ms ease; 
    opacity: 1; 
}
#fullImage.fading { opacity: 0; }

/* 禁用在拖动时的默认触摸滚动行为 */
.viewer-img-container { touch-action: none; -ms-touch-action: none; }

/* 占位图样式（当图片加载失败或懒加载未触发时） */
.img-placeholder {
    background: #f3f4f6;
    display: inline-block;
}

.brand-item p, .product-item p {
    color: #555; /* 新增：卡片文本颜色 */
    font-size: 1rem; /* 新增：卡片文本字号 */
    line-height: 1.7; /* 新增：卡片文本行高 */
}

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 30px 0;
    margin-top: 60px;
}

.footer-slogan {
    color: #d5e8ff;
    font-size: 21px;
    font-weight: 500;
    line-height: 1.2;
    margin: 8px 0;
    letter-spacing: 4px;
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.footer-beian,
.footer-jinghui {
    display: flex;
    align-items: center;
    color: #fff;
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.9rem;
}

.footer-beian:hover,
.footer-jinghui:hover a {
    color: #00a859;
}

.footer-jinghui a {
    color: inherit;
    text-decoration: none;
}

.footer-jinghui img {
    height: 18px;
    margin-right: 5px;
    vertical-align: middle;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); /* 优化：联系人卡片最小宽度 */
    gap: 30px;
    margin-top: 40px;
}

.contact-item {
    background: #ffffff; /* 优化：卡片背景改为纯白 */
    padding: 35px 30px; /* 优化：内边距增大 */
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05); /* 新增：轻微阴影 */
    transition: transform 0.3s, box-shadow 0.3s; /* 新增：过渡效果 */
}

/* 新增：联系人卡片hover效果 */
.contact-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.1);
}

.contact-item h3 {
    color: #0066cc;
    margin-bottom: 20px; /* 优化：标题下间距 */
    font-size: 1.4rem; /* 优化：标题字号 */
}

.contact-item p {
    font-size: 1.05rem; /* 新增：联系人文本字号 */
    color: #555; /* 新增：联系人文本颜色 */
}

/* ==========================
   Solution 页面专用样式（不影响页眉页脚）
   作用范围：只针对 .solution 区域的文字与交互元素
   ========================== */
.solution {
    background: linear-gradient(180deg, #f6fbff 0%, #ffffff 100%);
    padding: 60px 0;
}
.solution .container {
    max-width: 1100px;
}
.solution h2 {
    color: #0b6ea6;
    font-size: 2.2rem;
    margin-bottom: 18px;
}
.solution p {
    color: #4b5b63; /* 更柔和的正文颜色 */
    font-size: 1.15rem;
    line-height: 1.9;
}

.solution-categories {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    margin-top: 28px;
    align-items: stretch;
}

.intro-item {
    background: #ffffff;
    padding: 28px 26px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(11,78,120,0.06);
    transition: transform 0.28s ease, box-shadow 0.28s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.intro-item h3 {
    text-align: center;
    color: #0066cc;
    font-size: 1.35rem;
    margin-bottom: 8px;
}

.intro-item p {
    color: #56636a;
    flex: 1 1 auto;
}

.intro-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 40px rgba(11,78,120,0.08);
}

.intro-item .btn {
    display: inline-block;
    margin-top: 18px;
    padding: 10px 18px;
    background: linear-gradient(90deg, #00a859 0%, #0066cc 100%);
    color: #fff;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    box-shadow: 0 8px 20px rgba(0,102,204,0.12);
    transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
}

.intro-item .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 34px rgba(0,102,204,0.16);
}

.intro-item .btn:focus {
    outline: 3px solid rgba(0,166,89,0.18);
    outline-offset: 4px;
}

.solution a {
    text-align: center;
    color: #0066cc;
    text-decoration: underline;
}

.solution a:hover {
    color: #004a8f;
    text-decoration: none;
}

.news-item {
    background: #ffffff; /* 优化：卡片背景改为纯白 */
    padding: 30px 25px; /* 优化：内边距增大 */
    border-radius: 8px;
    margin-bottom: 30px; /* 优化：新闻项间距 */
    box-shadow: 0 2px 8px rgba(0,0,0,0.05); /* 新增：轻微阴影 */
    transition: transform 0.3s, box-shadow 0.3s; /* 新增：过渡效果 */
}

/* 新增：新闻项hover效果 */
.news-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.news-item h3 {
    text-align: center;
    color: #00a859;
    margin-bottom: 15px; /* 优化：标题下间距 */
    font-size: 1.5rem; /* 优化：标题字号 */
}

.news-item .date {
    text-align: center;
    color: #718096; /* 优化：日期颜色更柔和 */
    font-size: 0.9rem;
    margin-bottom: 15px; /* 优化：日期下间距 */
    font-weight: 500; /* 新增：日期加粗 */
}

.news-item .detail {
    color: #4a5568; /* 优化：详情文本颜色 */
    font-size: 1.05rem; /* 优化：详情文本字号 */
    line-height: 1.8; /* 优化：详情文本行高 */
}

.company p {
    text-align: center;
    margin-bottom: 40px;
    font-size: 1.15rem; /* 优化：公司介绍文本字号 */
    line-height: 1.9; /* 优化：公司介绍文本行高 */
    color: #4a5568; /* 优化：公司介绍文本颜色 */
}

.culture-section h2 {
    text-align: center;
    margin-bottom: 40px; /* 优化：标题下间距 */
    color: #0066cc;
}

.culture-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px; /* 优化：文化卡片间距 */
}

.culture-card {
    background: #ffffff; /* 优化：卡片背景改为纯白 */
    padding: 40px 30px; /* 优化：内边距增大 */
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.culture-card:hover {
    transform: translateY(-8px); /* 优化：hover上移距离 */
    box-shadow: 0 8px 20px rgba(0,0,0,0.12); /* 优化：hover阴影增强 */
}

.culture-card h3 {
    text-align: center;
    color: #0066cc;
    font-size: 1.6rem; /* 优化：标题字号 */
    margin-bottom: 20px; /* 优化：标题下间距 */
}

.culture-card p {
    color: #4a5568; /* 优化：文本颜色更柔和 */
    font-size: 1.05rem; /* 优化：文本字号 */
    line-height: 1.8; /* 优化：文本行高 */
    text-align: center;
}

/* 响应式样式 */
@media (max-width: 1024px) {
    nav ul li {
        margin-left: 0.75rem;
    }

    .hero,
    .carousel-container {
        max-width: 100%;
    }
}

@media (max-width: 880px) {
    .solution-categories {
        grid-template-columns: 1fr;
    }
    .solution {
        padding: 36px 0;
    }
    .solution h2 {
        font-size: 1.9rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .intro-item, .intro-item .btn {
        transition: none !important;
    }
}

@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .logo {
        margin-bottom: 15px;
    }

    .logo-img {
        height: clamp(2.25rem, 10vw, 3.125rem);
    }

    .logo h1 {
        font-size: 1.6rem;
    }

    .logo p {
        font-size: 0.9rem;
    }
    
    nav ul {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    nav ul li {
        margin-left: 0;
        margin-right: 1rem;
        margin-bottom: 0.625rem;
    }
    
    nav ul li a {
        font-size: 1rem;
    }
    
    section h2 {
        font-size: 2rem;
        padding-bottom: 10px; /* 适配移动端：标题装饰线下内边距 */
    }

    /* 适配移动端：section标题装饰线尺寸 */
    section h2::after {
        width: 60px;
        height: 3px;
    }
    
    .company p {
        font-size: 1rem; /* 优化：移动端文本字号 */
        padding: 0 15px; /* 优化：移动端左右内边距 */
        line-height: 1.8;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.1rem; /* 优化：移动端hero文本字号 */
        padding: 0 15px;
    }

    .footer-slogan {
        font-size: 1rem; /* 优化：移动端标语字号 */
        letter-spacing: 2px; /* 优化：移动端字间距 */
    }

    .brand-logo {
        height: 36px; /* 适配移动端：缩小logo高度 */
    }

    .device-category h3, .consumable-category h3 {
        font-size: 1.5rem; /* 适配移动端：缩小标题字号 */
        gap: 10px; /* 适配移动端：缩小间距 */
    }

    .culture-card {
        padding: 30px 20px; /* 优化：移动端文化卡片内边距 */
    }

    .culture-card h3 {
        font-size: 1.4rem; /* 优化：移动端文化卡片标题字号 */
    }

    .culture-card p {
        font-size: 1rem; /* 优化：移动端文化卡片文本字号 */
        padding: 0 5px;
    }

    .container {
        padding: 0 clamp(0.75rem, 4vw, 0.9375rem);
    }

    section {
        padding: 30px 0; /* 优化：移动端section内边距 */
    }

    .culture-cards {
        gap: 25px; /* 优化：移动端文化卡片间距 */
    }

    /* 适配移动端：轮播按钮尺寸 */
    .prev-btn, .next-btn {
        padding: 10px 12px;
        font-size: 1rem;
    }

    /* 适配移动端：轮播圆点尺寸 */
    .dot {
        width: 10px;
        height: 10px;
    }

    /* 适配移动端：品牌/产品列表间距 */
    .brand-list, .product-list {
        gap: 20px;
    }

    /* 适配移动端：联系人卡片内边距 */
    .contact-item {
        padding: 25px 20px;
    }

    /* 适配移动端：新闻项内边距 */
    .news-item {
        padding: 20px 15px;
    }
    .viewer-prev { left: -40px; }
    .viewer-next { right: -40px; }
    #fullImage {
        max-height: 80vh; /* 移动端减少高度占比，避免溢出 */
    }
    .viewer-page-indicator {
        bottom: -30px;
        font-size: 0.85rem;
        padding: 4px 10px;
    }
}

@media (max-width: 480px) {
    .viewer-btn { width: 2.75rem; height: 2.75rem; }
}

@media (max-width: 414px) {
    nav ul li a {
        font-size: 1rem;
        padding: 0.5rem 0.625rem;
    }

    .dropdown-menu {
        left: 50%;
        transform: translateX(-50%);
        -webkit-transform: translateX(-50%);
    }

    .hero {
        margin: 0.75rem auto;
    }
}

@media (max-width: 375px) {
    .logo-text h1 {
        font-size: 1.5rem;
    }

    section h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 320px) {
    nav ul li {
        margin-right: 0.5rem;
    }

    .hero p {
        font-size: 1rem;
    }
}