/* ===== 基础样式重置 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #e4393c;
    --primary-dark: #c53032;
    --primary-light: #ff6b6d;
    --secondary-color: #ff6700;
    --accent-color: #ff9500;
    --text-dark: #333;
    --text-medium: #666;
    --text-light: #999;
    --bg-white: #fff;
    --bg-gray: #f5f5f5;
    --bg-dark: #2d2d2d;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-dark);
    background-color: var(--bg-gray);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* ===== 顶部通栏 ===== */
.header-top {
    background: #f1f1f1;
    border-bottom: 1px solid var(--border-color);
    font-size: 12px;
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 30px;
}

.header-top-left .location {
    color: var(--text-medium);
    cursor: pointer;
}

.header-top-right {
    display: flex;
    align-items: center;
}

.top-link {
    color: var(--text-medium);
    padding: 0 10px;
    transition: var(--transition);
}

.top-link:hover,
.top-link.highlight {
    color: var(--primary-color);
}

.divider {
    color: #ddd;
}

/* ===== 头部主体 ===== */
.header-main {
    background: var(--bg-white);
    padding: 25px 0;
}

.header-main .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo-icon {
    font-size: 48px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 28px;
    font-weight: 900;
    color: var(--primary-color);
    letter-spacing: 2px;
}

.logo-slogan {
    font-size: 12px;
    color: var(--text-light);
}

/* 搜索框 */
.search-box {
    flex: 1;
    max-width: 560px;
}

.search-wrapper {
    display: flex;
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.search-category {
    background: #f8f8f8;
    border-right: 1px solid var(--border-color);
}

.search-category select {
    height: 40px;
    padding: 0 12px;
    border: none;
    background: transparent;
    font-size: 13px;
    color: var(--text-medium);
    cursor: pointer;
    outline: none;
}

.search-wrapper input {
    flex: 1;
    height: 40px;
    padding: 0 15px;
    border: none;
    font-size: 14px;
    outline: none;
}

.search-btn {
    width: 60px;
    background: var(--primary-color);
    border: none;
    color: white;
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
}

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

.hot-keywords {
    display: flex;
    gap: 15px;
    margin-top: 8px;
    font-size: 12px;
}

.hot-keywords a {
    color: var(--text-light);
    transition: var(--transition);
}

.hot-keywords a:hover {
    color: var(--primary-color);
}

/* 购物车 */
.header-actions {
    flex-shrink: 0;
}

.cart-box {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    background: var(--bg-white);
}

.cart-box:hover {
    border-color: var(--primary-color);
}

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

.cart-text {
    font-size: 13px;
}

.cart-count {
    min-width: 18px;
    height: 18px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 5px;
}

/* ===== 主导航栏 ===== */
.main-nav {
    background: var(--bg-dark);
    color: white;
}

.main-nav .container {
    display: flex;
    align-items: center;
    height: 40px;
}

.nav-category {
    width: 200px;
    background: var(--primary-color);
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0 20px;
    cursor: pointer;
    position: relative;
}

.category-title {
    font-size: 15px;
    font-weight: 600;
}

.category-panel {
    position: absolute;
    top: 100%;
    left: 0;
    width: 200px;
    background: var(--primary-color);
    z-index: 100;
    display: none;
}

.nav-category:hover .category-panel {
    display: block;
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-menu li {
    position: relative;
}

.nav-link {
    display: block;
    padding: 0 25px;
    font-size: 14px;
    color: white;
    transition: var(--transition);
    line-height: 40px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-light);
}

.live-tag {
    background: rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
    margin-left: 10px;
}

.promo-tags {
    margin-left: auto;
    display: flex;
    gap: 10px;
}

.promo-tags .tag {
    padding: 4px 10px;
    background: var(--secondary-color);
    border-radius: var(--radius-sm);
    font-size: 12px;
}

.promo-tags .tag.new {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* ===== 首屏焦点区 ===== */
.hero-section {
    background: var(--bg-white);
    padding-bottom: 20px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 200px 1fr 260px;
    gap: 10px;
    margin-top: 10px;
}

/* 左侧分类导航 */
.category-sidebar {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
}

.category-list {
    padding: 10px 0;
}

.category-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 13px;
}

.category-item:hover {
    background: #f8f8f8;
    color: var(--primary-color);
}

.category-arrow {
    color: var(--text-light);
    font-size: 12px;
}

/* 中间轮播图 */
.hero-carousel {
    position: relative;
    height: 400px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.carousel-track {
    display: flex;
    height: 100%;
    transition: transform 0.5s ease;
}

.carousel-item {
    min-width: 100%;
    position: relative;
}

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

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 70px;
    background: rgba(0,0,0,0.3);
    border: none;
    color: white;
    font-size: 30px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-btn:hover {
    background: rgba(0,0,0,0.5);
}

.carousel-btn.prev {
    left: 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.carousel-btn.next {
    right: 0;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.carousel-indicators {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.indicator.active {
    background: var(--primary-color);
}

/* 右侧用户面板 */
.user-panel {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    padding: 20px;
}

.user-card {
    text-align: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.user-avatar {
    width: 60px;
    height: 60px;
    margin: 0 auto 10px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-color);
}

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

.user-welcome {
    font-size: 13px;
    color: var(--text-medium);
    margin-bottom: 15px;
}

.user-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.btn-login,
.btn-register {
    padding: 8px 20px;
    border-radius: var(--radius-lg);
    font-size: 13px;
    transition: var(--transition);
}

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

.btn-login:hover {
    background: var(--primary-dark);
}

.btn-register {
    border: 1px solid var(--border-color);
    color: var(--text-dark);
}

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

/* 用户资产 */
.user-assets {
    display: flex;
    justify-content: space-around;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.asset-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
}

.asset-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
}

.asset-label {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 2px;
}

/* 快捷服务 */
.quick-services {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    padding: 15px 0;
}

.quick-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--text-medium);
    transition: var(--transition);
}

.quick-item:hover {
    color: var(--primary-color);
}

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

/* 公告栏 */
.notice-bar {
    display: flex;
    align-items: center;
    background: #fff8f0;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
}

.notice-tag {
    background: var(--secondary-color);
    color: white;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    margin-right: 8px;
    flex-shrink: 0;
}

.notice-scroll {
    overflow: hidden;
    white-space: nowrap;
    color: var(--text-medium);
}

/* ===== 限时秒杀 ===== */
.seckill-section {
    background: var(--bg-white);
    padding: 20px 0;
    margin-top: 20px;
}

.seckill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.seckill-title {
    display: flex;
    align-items: center;
    gap: 15px;
}

.title-icon {
    font-size: 28px;
}

.seckill-title h2 {
    font-size: 22px;
    color: var(--primary-color);
}

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

.countdown {
    display: flex;
    align-items: center;
    gap: 5px;
}

.time-box {
    width: 36px;
    height: 36px;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
}

.time-sep {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
}

.view-more {
    color: var(--text-light);
    font-size: 14px;
    transition: var(--transition);
}

.view-more:hover {
    color: var(--primary-color);
}

/* 秒杀滑块 */
.seckill-slider {
    position: relative;
    display: flex;
    align-items: center;
}

.seckill-track-wrapper {
    flex: 1;
    overflow: hidden;
    margin: 0 40px;
}

.seckill-track {
    display: flex;
    gap: 15px;
    transition: transform 0.5s ease;
}

.seckill-card {
    min-width: 200px;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
}

.seckill-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.seckill-image {
    position: relative;
    height: 180px;
    overflow: hidden;
}

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

.seckill-tag {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--primary-color);
    color: white;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
}

.seckill-info {
    padding: 12px;
}

.seckill-title-text {
    font-size: 13px;
    color: var(--text-dark);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 40px;
}

.seckill-price {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.seckill-current {
    font-size: 18px;
    color: var(--primary-color);
    font-weight: 700;
}

.seckill-current::before {
    content: '¥';
    font-size: 12px;
}

.seckill-original {
    font-size: 12px;
    color: var(--text-light);
    text-decoration: line-through;
}

.slider-btn {
    width: 30px;
    height: 60px;
    background: rgba(0,0,0,0.2);
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.slider-btn:hover {
    background: rgba(0,0,0,0.4);
}

/* ===== 推荐分类 ===== */
.category-icons {
    background: var(--bg-white);
    padding: 30px 0;
    margin-top: 20px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 20px;
}

.category-icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.category-icon-item:hover {
    transform: translateY(-4px);
}

.category-icon-img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--bg-gray);
}

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

.category-icon-name {
    font-size: 13px;
    color: var(--text-dark);
}

/* ===== 热门品牌 ===== */
.brands-section {
    background: var(--bg-white);
    padding: 30px 0;
    margin-top: 20px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-header.center {
    justify-content: center;
    flex-direction: column;
    gap: 8px;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
}

.section-subtitle {
    color: var(--text-light);
    font-size: 14px;
}

.heart {
    color: var(--primary-color);
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 15px;
}

.brand-item {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 80px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 15px;
    transition: var(--transition);
    cursor: pointer;
    background: var(--bg-white);
}

.brand-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.brand-item img {
    max-height: 100%;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: var(--transition);
}

.brand-item:hover img {
    filter: grayscale(0);
    opacity: 1;
}

/* ===== 品类楼层 ===== */
.floor-section {
    background: var(--bg-white);
    padding: 30px 0;
    margin-top: 20px;
}

.floor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
}

.floor-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

.floor-num {
    width: 30px;
    height: 30px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
}

.floor-title h2 {
    font-size: 20px;
    font-weight: 700;
}

.floor-tabs {
    display: flex;
    gap: 20px;
}

.floor-tabs a {
    font-size: 14px;
    color: var(--text-medium);
    transition: var(--transition);
}

.floor-tabs a:hover,
.floor-tabs a.active {
    color: var(--primary-color);
}

.floor-content {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 20px;
}

.floor-banner {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    height: 400px;
}

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

.banner-text {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    color: white;
}

.banner-text h3 {
    font-size: 24px;
    margin-bottom: 5px;
}

.banner-text p {
    font-size: 16px;
    opacity: 0.9;
}

.floor-banner.blue .banner-text { background: linear-gradient(to top, rgba(86,119,252,0.8), transparent); }
.floor-banner.green .banner-text { background: linear-gradient(to top, rgba(76,175,80,0.8), transparent); }
.floor-banner.pink .banner-text { background: linear-gradient(to top, rgba(233,30,99,0.8), transparent); }

.floor-products {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

/* 商品卡片 */
.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-tags {
    position: absolute;
    bottom: 10px;
    left: 10px;
    display: flex;
    gap: 5px;
}

.product-tag {
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 11px;
}

.product-tag.self {
    background: var(--primary-color);
    color: white;
}

.product-tag.free {
    background: #4caf50;
    color: white;
}

.product-info {
    padding: 12px;
}

.product-title {
    font-size: 13px;
    color: var(--text-dark);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 40px;
    margin-bottom: 8px;
}

.product-price-row {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 8px;
}

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

.product-price::before {
    content: '¥';
    font-size: 12px;
}

.product-original {
    font-size: 11px;
    color: var(--text-light);
    text-decoration: line-through;
}

.product-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-light);
}

.add-cart {
    width: 100%;
    padding: 8px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.add-cart:hover {
    background: var(--primary-dark);
}

/* ===== 直播带货 ===== */
.live-section {
    background: var(--bg-white);
    padding: 30px 0;
    margin-top: 20px;
}

.live-icon {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
}

.live-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.live-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.live-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.live-cover {
    position: relative;
    height: 180px;
}

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

.live-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.live-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: white;
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.live-viewer {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: rgba(0,0,0,0.6);
    color: white;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 12px;
}

.live-info {
    padding: 15px;
}

.live-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.live-host {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-medium);
}

.live-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    overflow: hidden;
}

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

/* ===== 为你推荐 ===== */
.recommend-section {
    background: var(--bg-white);
    padding: 30px 0;
    margin-top: 20px;
}

.products-waterfall {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 15px;
}

.loading-more {
    text-align: center;
    padding: 30px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-white);
    margin-top: 40px;
}

.service-bar {
    display: flex;
    justify-content: space-around;
    padding: 40px 0;
    border-bottom: 1px solid var(--border-color);
}

.service-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.service-icon {
    width: 50px;
    height: 50px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary-color);
}

.service-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.service-item p {
    font-size: 13px;
    color: var(--text-light);
}

.footer-links {
    display: flex;
    justify-content: space-between;
    padding: 40px 0;
    border-bottom: 1px solid var(--border-color);
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 15px;
}

.footer-col li {
    padding: 6px 0;
}

.footer-col a {
    font-size: 13px;
    color: var(--text-medium);
    transition: var(--transition);
}

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

.footer-bottom {
    padding: 25px 0;
    text-align: center;
}

.footer-nav {
    margin-bottom: 15px;
}

.footer-nav a {
    font-size: 13px;
    color: var(--text-medium);
    margin: 0 10px;
}

.footer-nav span {
    color: var(--border-color);
}

.copyright {
    font-size: 12px;
    color: var(--text-light);
}

/* ===== 侧边工具栏 ===== */
.side-toolbar {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-right: none;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.toolbar-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 10px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

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

.toolbar-item:hover {
    background: var(--bg-gray);
}

.toolbar-icon {
    font-size: 18px;
}

.toolbar-text {
    font-size: 11px;
    color: var(--text-medium);
    margin-top: 4px;
    writing-mode: vertical-rl;
}

.toolbar-item.cart .toolbar-text {
    writing-mode: horizontal-tb;
}

.toolbar-badge {
    position: absolute;
    top: 5px;
    right: 5px;
    min-width: 16px;
    height: 16px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    display: none;
}

.toolbar-badge.show {
    display: flex;
}

/* ===== 购物车侧边栏 ===== */
.cart-sidebar {
    position: fixed;
    top: 0;
    right: -360px;
    width: 360px;
    height: 100vh;
    background: var(--bg-white);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    transition: right 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.cart-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

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

.cart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.cart-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.cart-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light);
}

.cart-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.cart-empty {
    text-align: center;
    color: var(--text-light);
    padding: 60px 20px;
}

.cart-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.cart-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    font-size: 14px;
}

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

.checkout-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.checkout-btn:hover {
    background: var(--primary-dark);
}

/* 购物车商品项 */
.cart-item {
    display: flex;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

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

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

.cart-item-info {
    flex: 1;
}

.cart-item-title {
    font-size: 13px;
    color: var(--text-dark);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.cart-item-price {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 600;
}

.cart-item-qty {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.qty-btn {
    width: 24px;
    height: 24px;
    border: 1px solid var(--border-color);
    background: white;
    cursor: pointer;
    font-size: 14px;
    border-radius: var(--radius-sm);
}

.qty-value {
    min-width: 30px;
    text-align: center;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
    .category-icons .category-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .products-waterfall {
        grid-template-columns: repeat(4, 1fr);
    }

    .floor-products {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr 260px;
    }

    .category-sidebar {
        display: none;
    }

    .nav-category {
        display: none;
    }

    .floor-content {
        grid-template-columns: 1fr;
    }

    .floor-banner {
        height: 200px;
    }

    .brands-grid {
        grid-template-columns: repeat(4, 1fr);
    }

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

    .products-waterfall {
        grid-template-columns: repeat(3, 1fr);
    }

    .service-bar {
        flex-wrap: wrap;
        gap: 20px;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 30px;
    }

    .side-toolbar {
        bottom: 0;
        top: auto;
        transform: none;
        right: auto;
        left: 0;
        width: 100%;
        flex-direction: row;
        border-radius: 0;
        border: none;
        border-top: 1px solid var(--border-color);
    }

    .toolbar-item {
        flex: 1;
        flex-direction: row;
        border-bottom: none;
        border-right: 1px solid var(--border-color);
        padding: 10px;
    }

    .toolbar-text {
        writing-mode: horizontal-tb;
    }
}

@media (max-width: 768px) {
    .header-top {
        display: none;
    }

    .header-main .container {
        flex-wrap: wrap;
        gap: 15px;
    }

    .search-box {
        order: 3;
        max-width: 100%;
        flex-basis: 100%;
    }

    .main-nav {
        overflow-x: auto;
    }

    .main-nav .container {
        flex-wrap: nowrap;
    }

    .nav-menu {
        flex-shrink: 0;
    }

    .nav-link {
        padding: 0 15px;
        white-space: nowrap;
    }

    .promo-tags {
        display: none;
    }

    .hero-grid {
        grid-template-columns: 1fr;
    }

    .hero-carousel {
        height: 200px;
    }

    .user-panel {
        display: none;
    }

    .category-icons .category-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 10px;
    }

    .category-icon-img {
        width: 50px;
        height: 50px;
    }

    .brands-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

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

@media (max-width: 480px) {
    .logo-title {
        font-size: 20px;
    }

    .logo-slogan {
        display: none;
    }

    .category-icons .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }

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

    .live-grid {
        grid-template-columns: 1fr;
    }

    .floor-products,
    .products-waterfall {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .product-image {
        height: 150px;
    }

    .seckill-card {
        min-width: 150px;
    }

    .seckill-image {
        height: 130px;
    }

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

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

    .footer-nav {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 5px;
    }

    .footer-nav span {
        display: none;
    }
}