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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    padding-top: 70px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 10px;
}

/* 页脚专用容器，不居中 */
footer .container {
    margin: 0;
    max-width: 100%;
    padding: 0 20px;  /* 根据需要调整左右内边距 */
}

/* 页脚logo样式 - 统一位置和大小调整（所有页面统一生效，只需修改这里的值） */
footer .footer-logo,
footer div.footer-logo,
.footer-logo {
    text-align: right !important;
    padding: 10px 0 !important;
    margin-right: 80px !important;  /* ⬅️ 调整此值控制logo距离右边的距离：增大=向左移动，减小=向右移动 */
    margin-left: 0 !important;
}
footer .footer-logo img,
footer div.footer-logo img,
.footer-logo img,
footer img[src*="公司英文logo"],
footer img[alt*="Logo"] {
    max-height: 60px !important;  /* ⬅️ 调整此值控制logo高度：增大=logo变大，减小=logo变小 */
    height: 60px !important;  /* 固定高度，确保统一大小 */
    max-width: 200px !important;  /* 限制最大宽度，防止过大 */
    width: auto !important;  /* 宽度自动，保持比例 */
    object-fit: contain !important;  /* 保持图片比例，完整显示 */
    display: block !important;  /* 确保显示为块级元素 */
}
@media (max-width: 768px) {
    footer .footer-logo,
    footer div.footer-logo,
    .footer-logo {
        text-align: center !important;
        margin-top: 20px !important;
        margin-right: 0 !important;
        margin-left: 0 !important;
    }
    footer .footer-logo img,
    footer div.footer-logo img,
    .footer-logo img,
    footer img[src*="公司英文logo"],
    footer img[alt*="Logo"] {
        max-height: 50px !important;  /* 移动端稍小一些 */
        height: 50px !important;
        max-width: 150px !important;
    }
}

/* 添加主题色和全局变量 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --light-bg: #f8f9fa;
    --dark-text: #333;
    --muted-text: #666;
}

/* 头部导航样式 */
header {
    background: #fff;
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    font-size: 20px;
    color: var(--secondary-color);
    padding: 10px 0 4px 0;
}

/* 首页品牌副标题与分隔线 */
.brand-subline {
    width: 100%;
    height: 3px;
    background: #f06a2e; /* 近似橙色 */
    border-radius: 2px;
    margin-top: 2px;
}

.brand-subtitle {
    font-size: 12px;
    color: #666;
    letter-spacing: 1.5px;
    text-transform: lowercase;
    margin-top: 4px;
    display: flex;
    align-items: center;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

nav ul li a {
    padding: 15px;
    color: var(--secondary-color);
    font-weight: 500;
    text-decoration: none;
    display: block;
    transition: color 0.3s;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--primary-color);
}

/* 英雄区域样式 */
.hero {
    background: var(--light-bg);
    text-align: center;
    padding: 100px 20px;
}

.hero-content {
    max-width: 600px;
    margin-right: 40px;
}

.hero-content h2 {
    font-size: 42px;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.hero-content p {
    font-size: 18px;
    color: var(--muted-text);
    margin-bottom: 0;
}

/* 按钮统一风格 */
.btn {
    background: var(--primary-color);
    padding: 12px 28px;
    border-radius: 4px;
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: background 0.3s;
}

.btn:hover {
    background: #2980b9;
}

/* 英雄区域居中显示 */
.hero .container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

/* 产品功能区 */
.features {
    background: #fff;
    padding: 80px 20px;
}

.features h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 40px;
    color: var(--secondary-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

/* 单个特性区块样式 */
.features-grid .single-feature {
    grid-column: 1 / -1;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.feature {
    text-align: center;
    padding: 20px;
}

.feature img {
    width: 100%;
    max-width: 1000px;
    height: auto;
    margin-bottom: 20px;
    border-radius: 10px;
}

.feature h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.feature p {
    color: var(--muted-text);
}

/* 产品详细图片展示样式 */
.product-details {
    margin-top: 40px;
    padding: 20px 0;
    width: 100%;
}

.product-details h3 {
    text-align: center;
    font-size: 28px;
    margin-bottom: 40px;
    color: var(--secondary-color);
}

.details-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
    max-width: 100%;
    margin: 0 auto;
    align-items: center;
    padding: 0 20px;
}

.detail-item {
    text-align: center;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    box-shadow: none;
    transition: none;
    width: 100%;
    max-width: 1000px;
    margin: 0;
}

.detail-item:hover {
    transform: none;
    box-shadow: none;
}

.detail-item img {
    width: 100%;
    height: auto;
    border-radius: 0;
    max-width: 100%;
    display: block;
    margin: 0;
    padding: 0;
    border: none;
    box-shadow: none;
    background: transparent;
}

/* 购买区域布局样式 */
.purchase-container {
    display: flex;
    gap: 20px;
    margin-top: 20px;
    margin-bottom: 80px;
    padding: 0 20px;
    background: none;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    align-items: flex-start;
    position: relative;
}

/* 左侧产品图片区域 */
.product-image-column {
    flex: 0 0 58%;
    max-width: 750px;
    text-align: center;
    padding: 20px;
    position: relative;
}

/* 产品图片轮播样式 */
.product-image-carousel {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

/* 左侧缩略图列表 */
.thumbnail-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 80px;
    max-height: 500px;
    overflow-y: auto;
    padding-right: 5px;
}

.thumbnail-list::-webkit-scrollbar {
    width: 4px;
}

.thumbnail-list::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 2px;
}

.thumbnail-item {
    width: 100%;
    aspect-ratio: 1;
    border: 2px solid transparent;
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f5f5f5;
}

.thumbnail-item:hover {
    border-color: #ddd;
    transform: scale(1.05);
}

.thumbnail-item.active {
    border-color: #e74c3c;
    border-width: 3px;
}

.thumbnail-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.main-image-container {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.main-image-wrapper {
    width: 100%;
    text-align: center;
    position: relative;
}

.product-main-image {
    width: 100%;
    max-width: 100%;
    max-height: 90vh;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: none;
    display: block;
}

.product-main-image:hover {
    transform: scale(1.01);
}

/* 轮播切换按钮 */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid #ddd;
    border-radius: 50%;
    font-size: 24px;
    color: #333;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10;
    user-select: none;
}

.carousel-btn:hover {
    background: #fff;
    border-color: #e74c3c;
    color: #e74c3c;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.carousel-prev {
    left: 10px;
}

.carousel-next {
    right: 10px;
}

/* 右侧产品信息和支付区域 */
.product-info-column {
    width: 500px;
    text-align: left;
    padding: 20px;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 100px;
    right: 20px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    z-index: 100;
    background: transparent;
    box-shadow: none;
    border: none;
    border-radius: 0;
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* 移动端购买区域默认隐藏（桌面端显示） */
.mobile-purchase-section {
    display: none;
}

.product-info-column::-webkit-scrollbar {
    display: none;
}

@media (min-width: 1480px) {
    .product-info-column {
        right: calc((100% - 1400px) / 2 + 20px);
    }
}

.product-info-column h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--secondary-color);
    text-align: left;
}

/* 产品关键描述样式 */
.product-description {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #e0e0e0;
}

.product-formula,
.product-feature,
.product-certification {
    font-size: 15px;
    color: #555;
    margin-bottom: 8px;
    line-height: 1.6;
    display: flex;
    align-items: center;
    gap: 6px;
}

.product-formula {
    white-space: nowrap;
    flex-wrap: nowrap;
}


.product-feature {
    margin-bottom: 12px;
}

/* 认证标识样式 */
.product-certification {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.cert-label-image {
    height: 40px;
    width: auto;
    display: block;
    margin-right: 8px;
}

.cert-image {
    max-width: 80px;
    height: 40px;
    width: auto;
    object-fit: contain;
    display: block;
}

/* 描述图标样式 */
.desc-icon {
    font-size: 16px;
    display: inline-flex;
    align-items: center;
    margin-right: 2px;
}

.payment-column {
    width: 100%;
    margin-top: 20px;
    padding: 0;
    background: none;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

/* 精简的政策信息样式 */
.policy-info {
    margin-top: 12px;
    padding-top: 0;
    width: 100%;
}

.policy-info p {
    font-size: 15px;
    color: #555;
    margin: 6px 0;
    line-height: 1.6;
    display: flex;
    align-items: center;
    gap: 6px;
}

.price {
    font-size: 18px;
    color: #e74c3c;
    margin-bottom: 15px;
    font-weight: bold;
}

.price span {
    font-weight: bold;
    font-size: 24px;
}

.quantity {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 10px;
    margin-bottom: 25px;
}

.quantity label {
    font-size: 14px;
}

.quantity-selector {
    display: flex;
    align-items: center;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
    background: #fff;
}

.quantity-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: #f5f5f5;
    color: #333;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    user-select: none;
}

.quantity-btn:hover {
    background: #e0e0e0;
}

.quantity-btn:active {
    background: #d0d0d0;
}

.quantity input {
    width: 50px;
    height: 32px;
    padding: 0;
    text-align: center;
    font-size: 15px;
    border: none;
    border-left: 1px solid #ddd;
    border-right: 1px solid #ddd;
    border-radius: 0;
    background: #fff;
    appearance: textfield;
    -moz-appearance: textfield;
}

.quantity input::-webkit-outer-spin-button,
.quantity input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.form-column {
    flex: 1;
    min-width: 450px;
    background: none;
    padding: 25px;
    border-radius: 0;
    box-shadow: none;
    min-height: 500px;
}

.form-column h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

/* 视频演示区域样式 */
.video-demo {
    background: #fff;
    padding: 40px 0;
    margin-top: 40px;
    width: 100%;
}

.video-demo h2 {
    text-align: center;
    font-size: 32px;
    color: var(--secondary-color);
    margin-bottom: 30px;
}

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

.video-container video {
    width: 100%;
    height: auto;
    min-height: 300px;
    max-height: 700px;
    border-radius: 10px;
    object-fit: contain;
}

/* 产品详细介绍区域样式 */
.product-details-section {
    background: #fff;
    padding: 40px 0;
    margin-top: 20px;
    width: 100%;
}

.product-details-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.product-details-title {
    text-align: center;
    font-size: 28px;
    color: var(--secondary-color);
    margin-bottom: 40px;
    font-weight: 600;
}

.details-block {
    margin-bottom: 35px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.details-block-title {
    font-size: 22px;
    color: var(--secondary-color);
    margin-bottom: 20px;
    font-weight: 600;
}

.features-list,
.instructions-list,
.safety-list,
.troubleshooting-list,
.note-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.features-list li,
.instructions-list li,
.safety-list li,
.troubleshooting-list li,
.note-list li {
    padding: 12px 0;
    padding-left: 25px;
    position: relative;
    line-height: 1.8;
    color: #555;
    border-bottom: 1px solid #e0e0e0;
}

.features-list li:last-child,
.instructions-list li:last-child,
.safety-list li:last-child,
.troubleshooting-list li:last-child,
.note-list li:last-child {
    border-bottom: none;
}

.features-list li::before,
.instructions-list li::before,
.safety-list li::before,
.troubleshooting-list li::before,
.note-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 20px;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.spec-item {
    display: flex;
    padding: 12px;
    background: #fff;
    border-radius: 6px;
    border: 1px solid #e0e0e0;
}

.spec-label {
    font-weight: 600;
    color: var(--secondary-color);
    margin-right: 10px;
    min-width: 140px;
}

.spec-value {
    color: #555;
    flex: 1;
}

.highlight-block {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-left: none;
    text-align: center;
}

.highlight-text {
    font-size: 20px;
    font-weight: 500;
    margin: 0;
    line-height: 1.6;
}

.form-group {
    margin-bottom: 12px;
}

.form-group label {
    display: block;
    margin-bottom: 4px;
    color: var(--secondary-color);
    font-size: 14px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    box-sizing: border-box;
}

.form-group textarea {
    height: 70px;
    resize: vertical;
}

/* 电话输入容器样式 */
.phone-input-container {
    display: flex;
    gap: 8px;
}

.phone-input-container select {
    flex: 0 0 140px;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    background-color: #fff;
}

.phone-input-container input {
    flex: 1;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

/* 邮箱验证码容器样式 */
.email-verification-container {
    display: flex;
    gap: 8px;
    align-items: center;
}

.email-verification-container input[type="email"] {
    flex: 1;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.email-verification-container input[type="text"] {
    flex: 0 0 100px !important;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    text-align: center;
    letter-spacing: 2px;
    height: 34px;
}

/* 验证码容器样式 */
.verification-container {
    display: flex;
    gap: 8px;
    align-items: center;
}

.verification-container input {
    flex: 1;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    text-align: center;
    letter-spacing: 2px;
}

.send-code-btn {
    flex: 0 0 auto;
    padding: 8px 16px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.send-code-btn:hover {
    background-color: #2980b9;
}

.send-code-btn:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}

.verification-status {
    margin-top: 4px;
    font-size: 12px;
    min-height: 16px;
}

.verification-status.success {
    color: #27ae60;
}

.verification-status.error {
    color: #e74c3c;
}

.verification-status.info {
    color: #3498db;
}

/* 支付技术支持信息样式 */
.payment-support-info {
    margin-top: 8px;
    text-align: center;
}

.payment-support-info p {
    font-size: 12px;
    color: #666;
    margin: 0;
    font-style: italic;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.required {
    color: #c62828;
    margin-left: 2px;
}

/* ============================================
   页脚样式区域 (Footer Styles)
   ============================================ */
/* 
 * 页脚主容器样式
 */
footer {  /* footer: 页脚，HTML5语义化标签 */
    background: #000;  /* background: 背景，设置背景颜色为黑色(#000) */
    color: #fff;  /* color: 颜色，设置文字颜色为白色(#fff) */
    padding: 15px 0;  /* padding: 内边距，设置上下15px，左右20px的内边距 */
    position: relative;  /* position: 定位，relative表示相对定位 */
    z-index: 1;  /* z-index: 层级索引，数值越大越在上层，1表示在普通元素之上 */
}

/* 
 * 页脚内容容器（当前页脚使用内联样式，此样式可能未使用）
 */
.footer-content {  /* .footer-content: 页脚内容类选择器 */
    display: flex;  /* display: 显示方式，flex表示弹性盒子布局（Flexbox） */
    flex-wrap: wrap;  /* flex-wrap: 弹性换行，wrap表示当空间不足时允许换行 */
    gap: 20px;  /* gap: 间隙，设置子元素之间的间距为20px */
    justify-content: flex-start;  /* justify-content: 主轴对齐方式，flex-start表示左对齐（flex:弹性，start:开始） */
    margin-bottom: 40px;  /* margin-bottom: 底部外边距，设置底部外边距为40px（margin:外边距，bottom:底部） */
}

.footer-logo h2 {  /* .footer-logo h2: 页脚logo区域的二级标题 */
    font-size: 24px;  /* font-size: 字体大小，设置字体大小为24像素（font:字体，size:大小） */
    margin-bottom: 10px;  /* margin-bottom: 底部外边距，设置底部外边距为10px */
    color: #fff;  /* color: 颜色，设置文字颜色为白色 */
}

.footer-logo p {  /* .footer-logo p: 页脚logo区域的段落文字 */
    color: rgba(255, 255, 255, 0.9);  /* color: 颜色，rgba表示红绿蓝透明度，0.9表示90%不透明度（alpha:透明度） */
}

.footer-links ul {  /* .footer-links ul: 页脚链接区域的无序列表 */
    list-style: none;  /* list-style: 列表样式，none表示不显示列表标记（list:列表，style:样式） */
}

.footer-links h3 {  /* .footer-links h3: 页脚链接区域的三级标题 */
    color: #fff;  /* color: 颜色，设置文字颜色为白色 */
}

.footer-links ul li a {  /* .footer-links ul li a: 页脚链接列表中的链接元素 */
    color: rgba(255, 255, 255, 0.9);  /* color: 颜色，设置链接文字颜色为90%不透明的白色 */
    text-decoration: none;  /* text-decoration: 文本装饰，none表示无装饰（如下划线）（text:文本，decoration:装饰） */
    display: block;  /* display: 显示方式，block表示块级元素，独占一行 */
    margin-bottom: 8px;  /* margin-bottom: 底部外边距，设置底部外边距为8px */
    transition: color 0.3s;  /* transition: 过渡效果，设置颜色变化时0.3秒的过渡动画（transition:过渡） */
}

.footer-links ul li a:hover {  /* .footer-links ul li a:hover: 鼠标悬停时的链接样式（hover:悬停） */
    color: #fff;  /* color: 颜色，鼠标悬停时文字颜色变为纯白色 */
}

.footer-contact h3 {  /* .footer-contact h3: 页脚联系信息区域的三级标题 */
    color: #fff;  /* color: 颜色，设置文字颜色为白色 */
}

.footer-contact p {  /* .footer-contact p: 页脚联系信息区域的段落文字 */
    margin-bottom: 10px;  /* margin-bottom: 底部外边距，设置底部外边距为10px */
    color: rgba(255, 255, 255, 0.9);  /* color: 颜色，设置文字颜色为90%不透明的白色 */
}

.copyright {  /* .copyright: 版权信息类选择器（copyright:版权） */
    text-align: center;  /* text-align: 文本对齐，center表示居中对齐（text:文本，align:对齐） */
    padding-top: 20px;  /* padding-top: 顶部内边距，设置顶部内边距为20px（padding:内边距，top:顶部） */
    border-top: 1px solid rgba(255, 255, 255, 0.3);  /* border-top: 顶部边框，1px实线，30%不透明的白色（border:边框，top:顶部，solid:实线） */
    color: rgba(255, 255, 255, 0.9);  /* color: 颜色，设置文字颜色为90%不透明的白色 */
}

.copyright p {  /* .copyright p: 版权信息中的段落文字 */
    color: rgba(255, 255, 255, 0.9);  /* color: 颜色，设置文字颜色为90%不透明的白色 */
}

.copyright a {  /* .copyright a: 版权信息中的链接元素 */
    color: rgba(255, 255, 255, 0.9);  /* color: 颜色，设置链接文字颜色为90%不透明的白色 */
}


/* 通用标题样式 */
h2, h3 {
    font-weight: 600;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 移动端视频和图片调整 */
    .video-container video {
        min-height: 200px;
        max-height: 300px;
    }
    
    .features-grid .single-feature {
        max-width: 100%;
        padding: 0;
    }
    
    .feature img {
        max-width: 100%;
    }
    
    /* 移动端产品详细图片调整 */
    .details-grid {
        gap: 0;
        padding: 0;
        max-width: 100%;
    }
    
    .detail-item {
        padding: 0;
        max-width: 100%;
        margin: 0;
    }
    
    .detail-item img {
        width: 100%;
        max-width: 100%;
        margin: 0;
        padding: 0;
    }
    
    /* 移动端视频容器全屏 */
    .video-container {
        padding: 0;
        max-width: 100%;
    }
    
    /* 移动端产品图片列全屏 */
    .product-image-carousel {
        padding: 0;
    }
    
    .main-image-container {
        padding: 0 0;
    }
    
    .thumbnail-list {
        padding: 10px;
    }
    
    .product-details h3 {
        font-size: 24px;
        margin-bottom: 30px;
    }
    
    /* 移动端购买区域调整 */
    .purchase-container {
        flex-direction: column;
        gap: 0;
        padding: 0;
    }
    
    .product-image-column {
        flex: none;
        width: 100%;
        max-width: 100%;
        margin-right: 0;
        padding: 0;
        display: flex;
        flex-direction: column;
    }
    
    /* 桌面端购买区域在移动端隐藏 */
    .desktop-purchase-section {
        display: none;
    }
    
    /* 移动端购买区域显示 */
    .mobile-purchase-section {
        display: block;
        width: 100%;
        max-width: 100%;
        text-align: center;
        position: static;
        max-height: none;
        overflow-y: visible;
        right: auto;
        box-shadow: none;
        border-radius: 0;
        padding: 20px 15px;
        margin: 0;
    }
    
    /* 视频、产品详情、评论等放在购买区域后面 */
    .video-demo {
        padding: 40px 15px;
    }
    
    .product-details {
        padding: 20px 15px;
    }
    
    /* 移动端产品详细介绍区域样式 */
    .product-details-section {
        padding: 30px 0;
        margin-top: 20px;
    }
    
    .product-details-container {
        padding: 0 15px;
    }
    
    .product-details-title {
        font-size: 22px;
        margin-bottom: 30px;
    }
    
    .details-block {
        padding: 20px 15px;
        margin-bottom: 25px;
    }
    
    .details-block-title {
        font-size: 18px;
        margin-bottom: 15px;
    }
    
    .features-list li,
    .instructions-list li,
    .safety-list li,
    .troubleshooting-list li,
    .note-list li {
        padding: 10px 0;
        padding-left: 20px;
        font-size: 14px;
        line-height: 1.6;
    }
    
    .specs-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .spec-item {
        flex-direction: column;
        padding: 10px;
    }
    
    .spec-label {
        min-width: auto;
        margin-bottom: 5px;
        margin-right: 0;
    }
    
    .highlight-text {
        font-size: 16px;
    }
    
    .customer-reviews {
        padding: 30px 15px;
    }
    
    .product-info-column h3 {
        text-align: center;
    }
    
    .product-description {
        text-align: center;
    }
    
    .product-formula,
    .product-feature {
        justify-content: center;
    }
    
    .product-certification {
        justify-content: center;
        flex-direction: row;
        align-items: center;
        flex-wrap: nowrap;
        gap: 8px;
    }
    
    .product-certification .cert-label-image {
        height: 35px;
        width: auto;
        margin-right: 8px;
    }
    
    .product-certification .cert-image {
        max-width: 70px;
        height: 35px;
        width: auto;
    }
    
    .quantity {
        justify-content: center;
    }
    
    .payment-column {
        width: 100%;
        max-width: 100%;
        align-items: center;
    }
    
    .policy-info {
        text-align: center;
    }
    
    .policy-info p {
        justify-content: center;
    }
    
    .form-column {
        min-width: auto;
        width: 100%;
    }
    
    /* 
     * 移动端页脚样式调整（响应式设计）
     */
    footer {  /* footer: 页脚，在移动端（屏幕宽度小于768px）时的样式 */
        padding-right: 20px;  /* padding-right: 右侧内边距，设置右侧内边距为20px（padding:内边距，right:右侧） */
    }
}

/* 表单消息样式 */
.form-message {
    padding: 15px;
    margin: 20px 0;
    border-radius: 4px;
    text-align: center;
    font-size: 16px;
    display: none;
}

.form-message.info {
    display: block;
    background-color: #e3f2fd;
    color: #1976d2;
    border: 1px solid #bbdefb;
}

.form-message.success {
    display: block;
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
}

.form-message.error {
    display: block;
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ffcdd2;
}

/* 验证码弹窗样式 */
.verification-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9998;
}

.verification-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    z-index: 9999;
    min-width: 400px;
    max-width: 90vw;
}

.verification-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px 15px;
    border-bottom: 1px solid #eee;
}

.verification-header h3 {
    margin: 0;
    color: #333;
    font-size: 18px;
}

.close-btn {
    font-size: 24px;
    cursor: pointer;
    color: #999;
    line-height: 1;
}

.close-btn:hover {
    color: #333;
}

.verification-body {
    padding: 20px 25px 25px;
}

.verification-body p {
    margin: 0 0 20px;
    color: #666;
    font-size: 14px;
}

.verification-body p span {
    color: #333;
    font-weight: 500;
}

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

.verification-form label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

.code-input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

#verification-code {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
    text-align: center;
    letter-spacing: 2px;
}

#verification-code:focus {
    outline: none;
    border-color: #007bff;
}

.resend-btn {
    padding: 12px 15px;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    white-space: nowrap;
}

.resend-btn:hover:not(:disabled) {
    background: #5a6268;
}

.resend-btn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.countdown {
    margin-top: 8px;
    font-size: 12px;
    color: #dc3545;
    text-align: center;
}

.verification-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.verification-actions .btn {
    padding: 12px 25px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.verify-btn {
    background: #28a745;
    color: white;
}

.verify-btn:hover {
    background: #218838;
}

.cancel-btn {
    background: #6c757d;
    color: white;
}

.cancel-btn:hover {
    background: #5a6268;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .verification-modal {
        min-width: 90vw;
        margin: 20px;
    }
    
    .code-input-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .verification-actions {
        flex-direction: column;
    }
}

.alipay-btn {
    width: 100%;
    margin-top: 15px;
    background: #1677ff;
    color: white;
    border: none;
    padding: 15px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.alipay-btn:hover {
    background: #4096ff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

.paypal-container {
    margin-top: 10px;
    display: block;
    width: 100%;
    max-width: 300px;
}

.paypal-container.active {
    display: block;
}

/* 图片放大模态框样式 */
.image-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.9);
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    margin: auto;
    display: block;
    width: auto;
    max-width: 90%;
    max-height: 90vh;
    margin-top: 5vh;
    animation: zoomIn 0.3s;
}

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

.modal-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
    z-index: 10000;
}

.modal-close:hover,
.modal-close:focus {
    color: #fff;
    text-decoration: none;
}

/* 客户注意事项样式 */
.delivery-notice {
    background-color: #fff3cd;
    border: 1px solid #ffc107;
    border-left: 4px solid #e74c3c;
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 20px;
}

.delivery-notice p {
    color: #e74c3c;
    font-size: 14px;
    margin-bottom: 10px;
    font-weight: 500;
}

.delivery-notice ul {
    margin: 10px 0 0 20px;
    color: #856404;
    font-size: 14px;
}

.delivery-notice ul li {
    margin-bottom: 5px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .delivery-notice {
        padding: 12px;
    }
    
    .delivery-notice p,
    .delivery-notice ul {
        font-size: 13px;
    }
    
    /* 移动端评论部分调整 */
    .customer-reviews {
        padding: 30px 20px;
    }
    
    .reviews-overview {
        flex-direction: column;
        gap: 20px;
    }
    
    .rating-breakdown {
        width: 100%;
    }
}

/* 顾客评论部分样式 */
.customer-reviews {
    background: #fafafa;
    padding: 40px 20px;
    margin-top: 40px;
    width: 100%;
}

.product-image-column .customer-reviews .container {
    max-width: 100%;
    padding: 0;
}

.reviews-title {
    text-align: center;
    font-size: 32px;
    color: var(--secondary-color);
    margin-bottom: 40px;
    font-weight: 600;
}

.reviews-summary {
    max-width: 1000px;
    margin: 0 auto 40px;
}

.reviews-overview {
    display: flex;
    gap: 60px;
    align-items: flex-start;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.overall-rating {
    text-align: center;
    min-width: 200px;
}

.stars-display {
    font-size: 36px;
    color: #ffc107;
    margin-bottom: 10px;
    letter-spacing: 4px;
}

.stars-display .star {
    color: #ffc107;
}

.rating-score {
    font-size: 28px;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.rating-max {
    font-size: 16px;
    font-weight: normal;
    color: var(--muted-text);
}

.reviews-count {
    font-size: 14px;
    color: var(--muted-text);
}

.rating-breakdown {
    flex: 1;
}

.rating-bar-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 12px;
}

.rating-label {
    min-width: 40px;
    font-size: 14px;
    color: var(--secondary-color);
}

.rating-bar {
    flex: 1;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

.rating-bar-fill {
    height: 100%;
    background: #2e7d32;
    transition: width 0.3s ease;
}

.rating-percentage {
    min-width: 45px;
    font-size: 14px;
    color: var(--muted-text);
    text-align: right;
}

.reviews-list {
    max-width: 1000px;
    margin: 0 auto;
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.reviews-header {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e0e0e0;
}

.reviews-sort {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    color: var(--secondary-color);
    background: #fff;
    cursor: pointer;
}

.review-item {
    padding: 20px 0;
    border-bottom: 1px solid #f0f0f0;
}

.review-item:last-child {
    border-bottom: none;
}

.review-rating {
    margin-bottom: 10px;
}

.review-rating .star {
    font-size: 18px;
    color: #ddd;
    margin-right: 2px;
}

.review-rating .star.filled {
    color: #ffc107;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.review-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #e0e0e0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.review-name {
    font-weight: 500;
    color: var(--secondary-color);
}

.review-date {
    margin-left: auto;
    font-size: 14px;
    color: var(--muted-text);
}

.review-content {
    color: #555;
    line-height: 1.6;
    font-size: 15px;
}

/* 社交媒体图标样式 */
.social-media-icons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 1001;
}

.social-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
}

.social-icon:hover {
    background: #fff;
    transform: translateY(-3px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.social-icon svg {
    width: 24px;
    height: 24px;
}

/* Facebook 图标颜色 */
.social-icon:nth-child(1):hover {
    color: #1877f2;
}

/* X (Twitter) 图标颜色 */
.social-icon:nth-child(2):hover {
    color: #000;
}

/* Instagram 图标颜色 */
.social-icon:nth-child(3):hover {
    color: #e4405f;
}

/* YouTube 图标颜色 */
.social-icon:nth-child(4):hover {
    color: #ff0000;
}

/* TikTok 图标颜色 */
.social-icon:nth-child(5):hover {
    color: #000000;
}

/* 响应式设计 - 移动端社交媒体图标 */
@media (max-width: 768px) {
    .social-media-icons {
        bottom: 20px;
        right: 20px;
        gap: 12px;
    }
    
    .social-icon {
        width: 44px;
        height: 44px;
    }
    
    .social-icon svg {
        width: 22px;
        height: 22px;
    }
}