/* ==================== CSS 变量系统 ==================== */
:root {
    /* 颜色 */
    --primary-color: #FF6B35;
    --primary-dark: #E55A2B;
    --primary-light: #FF8C5A;
    --secondary-color: #2D3436;
    --background: #FFFFFF;
    --background-alt: #F8F9FA;
    --text-color: #2D3436;
    --text-light: #636E72;
    --text-muted: #B2BEC3;
    --border-color: #DFE6E9;
    --success-color: #00B894;
    --error-color: #D63031;
    --warning-color: #FDCB6E;

    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;

    /* 圆角 */
    --border-radius-sm: 8px;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.15);

    /* 过渡 */
    --transition-fast: all 0.15s ease;
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;

    /* 字体 */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* 导航栏高度 */
    --navbar-height: 70px;
}

/* ==================== 深色主题变量 ==================== */
[data-theme="dark"] {
    --secondary-color: #F8F9FA;
    --background: #1A1A2E;
    --background-alt: #16213E;
    --text-color: #F8F9FA;
    --text-light: #B2BEC3;
    --text-muted: #636E72;
    --border-color: #2D3436;
}

/* ==================== 主题切换按钮 ==================== */
.theme-toggle {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-full);
    font-size: 24px;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: var(--transition);
}

.theme-toggle:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    background: var(--primary-dark);
}

.theme-toggle:active {
    transform: translateY(0);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-color);
    background-color: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
}

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

button {
    font-family: var(--font-body);
    cursor: pointer;
    border: none;
    outline: none;
    transition: var(--transition);
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-color);
}

.nav-logo i {
    font-size: 28px;
}

.nav-search {
    flex: 1;
    max-width: 600px;
    display: flex;
    align-items: center;
    background: var(--background-alt);
    border-radius: var(--border-radius-full);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid transparent;
    transition: var(--transition);
}

.nav-search:focus-within {
    border-color: var(--primary-color);
    background: var(--background);
}

.nav-search input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 15px;
    color: var(--text-color);
    outline: none;
}

.nav-search input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    background: transparent;
    color: var(--text-light);
    padding: var(--spacing-xs);
    font-size: 18px;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.cart-btn {
    position: relative;
    background: transparent;
    color: var(--text-color);
    font-size: 22px;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
}

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

.cart-badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--primary-color);
    color: white;
    font-size: 11px;
    font-weight: 600;
    min-width: 18px;
    height: 18px;
    border-radius: var(--border-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
}

.menu-btn {
    display: none;
    background: transparent;
    color: var(--text-color);
    font-size: 22px;
    padding: var(--spacing-sm);
}

/* ==================== 移动端菜单 ==================== */
.mobile-menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 280px;
    height: 100vh;
    background: var(--background);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    transition: var(--transition);
    overflow-y: auto;
}

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

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
}

.close-menu-btn {
    background: transparent;
    color: var(--text-color);
    font-size: 20px;
    padding: var(--spacing-xs);
}

.mobile-menu-search {
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    gap: var(--spacing-sm);
}

.mobile-menu-search input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    outline: none;
}

.mobile-menu-search button {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
}

.mobile-menu-links {
    padding: var(--spacing-md) 0;
}

.mobile-menu-links li a {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-color);
    font-size: 15px;
    transition: var(--transition);
}

.mobile-menu-links li a:hover {
    background: var(--background-alt);
    color: var(--primary-color);
}

.mobile-menu-links li a i {
    width: 20px;
    text-align: center;
}

/* ==================== 轮播图 ==================== */
.carousel-section {
    margin-top: var(--navbar-height);
    width: 100%;
    height: 500px;
    overflow: hidden;
}

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

.carousel-inner {
    display: flex;
    width: 100%;
    height: 100%;
    transition: transform 0.5s ease-in-out;
}

.carousel-slide {
    min-width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.carousel-slide:nth-child(2) {
    background: linear-gradient(135deg, #6C5CE7 0%, #A29BFE 100%);
}

.carousel-slide:nth-child(3) {
    background: linear-gradient(135deg, #00B894 0%, #00CEC9 100%);
}

.carousel-content {
    text-align: center;
    color: white;
    padding: var(--spacing-xl);
    animation: fadeInUp 0.8s ease;
}

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

.carousel-content h2 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.carousel-content p {
    font-size: 20px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.carousel-btn {
    background: white;
    color: var(--primary-color);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--border-radius-full);
    box-shadow: var(--shadow);
}

.carousel-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-color);
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-full);
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    z-index: 10;
}

.carousel-arrow:hover {
    background: white;
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev {
    left: var(--spacing-xl);
}

.carousel-next {
    right: var(--spacing-xl);
}

.carousel-indicators {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-sm);
    z-index: 10;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: var(--border-radius-full);
    background: rgba(255, 255, 255, 0.5);
    border: 2px solid transparent;
    transition: var(--transition);
}

.indicator.active {
    background: white;
    width: 32px;
}

/* ==================== 商品列表 ==================== */
.products-section {
    padding: var(--spacing-xxl) 0;
    background: var(--background-alt);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-header h2 {
    font-size: 36px;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    margin: 0 auto;
    border-radius: var(--border-radius-full);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.product-card {
    background: var(--background);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.product-image {
    position: relative;
    width: 100%;
    height: 280px;
    overflow: hidden;
    background: var(--background-alt);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

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

.product-badge {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: 12px;
    font-weight: 600;
}

.product-info {
    padding: var(--spacing-lg);
}

.product-category {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.product-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-price {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--spacing-md);
}

.price {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.add-to-cart-btn {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.add-to-cart-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.add-to-cart-btn:active {
    transform: scale(0.95);
}

/* ==================== 特色服务 ==================== */
.features-section {
    padding: var(--spacing-xxl) 0;
    background: var(--background);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    background: var(--background-alt);
    transition: var(--transition);
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--border-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
}

/* ==================== 购物车侧边栏 ==================== */
.cart-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    z-index: 1500;
    transition: var(--transition);
}

.cart-overlay.active {
    opacity: 1;
    visibility: visible;
}

.cart-sidebar {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: var(--background);
    box-shadow: var(--shadow-xl);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.cart-sidebar.active {
    right: 0;
}

.cart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.cart-header h3 {
    font-size: 20px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.cart-close {
    background: transparent;
    color: var(--text-color);
    font-size: 20px;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
}

.cart-close:hover {
    background: var(--background-alt);
    color: var(--primary-color);
}

.cart-items {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.cart-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
}

.cart-empty i {
    font-size: 64px;
    margin-bottom: var(--spacing-md);
    opacity: 0.3;
}

.cart-empty p {
    font-size: 18px;
    margin-bottom: var(--spacing-xs);
}

.cart-empty span {
    font-size: 14px;
}

.cart-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--background-alt);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.cart-item-image {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius);
    overflow: hidden;
    flex-shrink: 0;
}

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

.cart-item-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.cart-item-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.cart-item-price {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary-color);
}

.cart-item-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--spacing-sm);
}

.quantity-control {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--background);
    border-radius: var(--border-radius-sm);
    padding: 2px;
}

.quantity-btn {
    width: 28px;
    height: 28px;
    background: transparent;
    color: var(--text-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.quantity-value {
    min-width: 32px;
    text-align: center;
    font-weight: 600;
    font-size: 14px;
}

.remove-item-btn {
    background: transparent;
    color: var(--text-muted);
    font-size: 16px;
    padding: var(--spacing-xs);
}

.remove-item-btn:hover {
    color: var(--error-color);
}

.cart-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: var(--background);
}

.cart-total {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    font-size: 18px;
}

.total-price {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.checkout-btn {
    width: 100%;
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-md);
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.checkout-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

/* ==================== 页脚 ==================== */
.footer {
    background: var(--secondary-color);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.footer-logo i {
    font-size: 28px;
}

.footer-desc {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: white;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: var(--spacing-md);
    color: white;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.contact-info li i {
    color: var(--primary-color);
    width: 20px;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.5);
}

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

/* ==================== 深色主题页脚适配 ==================== */
[data-theme="dark"] .footer {
    background: #0F0F1A;
}

[data-theme="dark"] .footer-desc {
    color: var(--text-light);
}

[data-theme="dark"] .social-links a {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-light);
}

[data-theme="dark"] .footer-section h4 {
    color: var(--text-color);
}

[data-theme="dark"] .footer-section ul li a {
    color: var(--text-light);
}

[data-theme="dark"] .contact-info li {
    color: var(--text-light);
}

[data-theme="dark"] .footer-bottom {
    border-top-color: var(--border-color);
    color: var(--text-muted);
}

[data-theme="dark"] .footer-links a {
    color: var(--text-muted);
}

/* ==================== 深色主题 Toast 适配 ==================== */
[data-theme="dark"] .toast {
    background: #2D3436;
}

/* ==================== Toast 提示 ==================== */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--secondary-color);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 15px;
    z-index: 3000;
    opacity: 0;
    transition: var(--transition);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast i {
    color: var(--success-color);
    font-size: 18px;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1199px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 991px) {
    .nav-search {
        max-width: 400px;
    }

    .carousel-content h2 {
        font-size: 36px;
    }

    .carousel-content p {
        font-size: 18px;
    }
}

@media (max-width: 768px) {
    :root {
        --navbar-height: 60px;
    }

    .nav-search {
        display: none;
    }

    .menu-btn {
        display: block;
    }

    .carousel-section {
        height: 400px;
    }

    .carousel-content h2 {
        font-size: 28px;
    }

    .carousel-content p {
        font-size: 16px;
    }

    .carousel-arrow {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }

    .carousel-prev {
        left: var(--spacing-md);
    }

    .carousel-next {
        right: var(--spacing-md);
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .product-image {
        height: 200px;
    }

    .product-info {
        padding: var(--spacing-md);
    }

    .product-name {
        font-size: 14px;
    }

    .price {
        font-size: 18px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .feature-card {
        padding: var(--spacing-md);
        text-align: left;
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
    }

    .feature-icon {
        width: 48px;
        height: 48px;
        margin: 0;
        font-size: 20px;
        flex-shrink: 0;
    }

    .feature-card h3 {
        font-size: 14px;
        margin-bottom: 0;
    }

    .feature-card p {
        display: none;
    }

    .cart-sidebar {
        width: 100%;
        right: -100%;
    }

    .footer {
        padding: var(--spacing-lg) 0 var(--spacing-md);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .footer-section {
        padding: 0;
    }

    .footer-section:first-child {
        grid-column: span 2;
        text-align: center;
        margin-bottom: var(--spacing-sm);
    }

    .footer-logo {
        justify-content: center;
        margin-bottom: var(--spacing-sm);
    }

    .footer-desc {
        display: none;
    }

    .social-links {
        justify-content: center;
    }

    .footer-section h4 {
        font-size: 14px;
        margin-bottom: var(--spacing-xs);
    }

    .footer-section ul {
        display: flex;
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .footer-section ul li {
        margin-bottom: 0;
    }

    .footer-section ul li a {
        font-size: 12px;
        white-space: nowrap;
    }

    .contact-info {
        display: flex;
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .contact-info li {
        font-size: 12px;
        gap: var(--spacing-xs);
    }

    .contact-info li i {
        width: 14px;
        font-size: 12px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
        padding-top: var(--spacing-md);
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-md);
    }

    .footer-bottom p,
    .footer-links a {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .products-grid {
        grid-template-columns: 1fr;
    }

    .product-image {
        height: 280px;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .carousel-section {
        height: 350px;
    }

    .carousel-content h2 {
        font-size: 24px;
    }

    .carousel-content p {
        font-size: 14px;
    }

    .carousel-btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 14px;
    }
}

/* ==================== 微信弹窗样式 ==================== */
.wechat-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    z-index: 2500;
    transition: var(--transition);
}

.wechat-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.wechat-modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--background);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    max-width: 360px;
    width: 90%;
    z-index: 3000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-xl);
}

.wechat-modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.wechat-modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: transparent;
    color: var(--text-light);
    border: none;
    font-size: 20px;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-full);
    transition: var(--transition);
}

.wechat-modal-close:hover {
    background: var(--background-alt);
    color: var(--text-color);
}

.wechat-modal-content {
    text-align: center;
}

.wechat-modal-content h3 {
    font-size: 20px;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
}

.wechat-modal-content p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.wechat-qrcode {
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-lg);
    border-radius: var(--border-radius);
    overflow: hidden;
    background: white;
    box-shadow: var(--shadow);
}

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

.wechat-tip {
    font-size: 12px !important;
    color: var(--text-muted) !important;
}

/* 深色主题微信弹窗适配 */
[data-theme="dark"] .wechat-modal {
    background: var(--background-alt);
}

[data-theme="dark"] .wechat-qrcode {
    background: #2D3436;
}