/* ========================================
   长沙熊纯溪贸易有限公司 - 移动通信设备销售网站
   移动端优先设计
======================================== */

/* CSS变量定义 */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #ec4899;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16162a;
    --bg-hover: #252545;
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;
    
    --border-color: #2a2a4a;
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    --header-height: 56px;
    --bottom-nav-height: 64px;
    --status-bar-height: 24px;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    padding-top: calc(var(--status-bar-height) + var(--header-height));
    padding-bottom: var(--bottom-nav-height);
}

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

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

/* 状态栏 */
.status-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--status-bar-height);
    background: var(--bg-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--spacing-md);
    font-size: 12px;
    color: var(--text-primary);
    z-index: 1000;
}

.status-right i {
    margin-left: 4px;
    font-size: 10px;
}

/* 头部导航 */
.header {
    position: fixed;
    top: var(--status-bar-height);
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
    z-index: 999;
    border-bottom: 1px solid var(--border-color);
}

.header-left {
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 700;
    font-size: 14px;
    color: var(--primary-color);
}

.logo i {
    font-size: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-center {
    flex: 1;
    margin: 0 var(--spacing-md);
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 12px;
    color: var(--text-muted);
    font-size: 14px;
}

.search-box input {
    width: 100%;
    height: 36px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 0 12px 0 36px;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    transition: all 0.3s ease;
}

.search-box input:focus {
    border-color: var(--primary-color);
    background: var(--bg-card);
}

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

.header-right {
    display: flex;
    gap: var(--spacing-sm);
}

.icon-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
}

.icon-btn:hover {
    background: var(--bg-hover);
    color: var(--primary-color);
}

.cart-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 18px;
    height: 18px;
    background: var(--danger-color);
    border-radius: 50%;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* 主内容区 */
.main-content {
    padding: var(--spacing-md);
}

/* 轮播Banner */
.banner-section {
    position: relative;
    margin-bottom: var(--spacing-lg);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.banner-slider {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.banner-slide.active {
    opacity: 1;
}

.banner-slide:nth-child(2) {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.banner-slide:nth-child(3) {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
}

.banner-content {
    flex: 1;
    z-index: 2;
}

.banner-content h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.banner-content p {
    font-size: 13px;
    opacity: 0.9;
    margin-bottom: 8px;
}

.banner-price {
    display: block;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.banner-btn {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid rgba(255,255,255,0.3);
    transition: all 0.3s ease;
}

.banner-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

.banner-image {
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 160px;
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner-image img {
    max-height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 10px 20px rgba(0,0,0,0.3));
}

.banner-dots {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}

.dot.active {
    width: 18px;
    border-radius: 3px;
    background: #fff;
}

/* 分类区域 */
.category-section {
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title i {
    color: var(--primary-color);
}

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

.category-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.category-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
    transition: all 0.3s ease;
}

.category-item:hover .category-icon {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

.category-item span {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 限时秒杀 */
.flash-sale {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--border-color);
}

.flash-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.flash-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 700;
}

.flash-title i {
    color: var(--danger-color);
    animation: flash 1s infinite;
}

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

.flash-countdown {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
}

.countdown-box {
    display: flex;
    gap: 2px;
}

.countdown-box span {
    display: inline-block;
    width: 22px;
    height: 22px;
    background: var(--danger-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
}

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

.flash-item {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    transition: all 0.3s ease;
}

.flash-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color);
}

.flash-image {
    position: relative;
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.flash-image img {
    max-height: 100%;
    object-fit: contain;
}

.flash-tag {
    position: absolute;
    top: -4px;
    left: -4px;
    background: var(--danger-color);
    color: #fff;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}

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

.flash-info h4 {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.3;
}

.flash-price {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.flash-price .current {
    font-size: 16px;
    font-weight: 700;
    color: var(--danger-color);
}

.flash-price .original {
    font-size: 11px;
    color: var(--text-muted);
    text-decoration: line-through;
}

.flash-progress {
    display: flex;
    align-items: center;
    gap: 6px;
}

.progress-bar {
    flex: 1;
    height: 4px;
    background: var(--bg-hover);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-2);
    border-radius: 2px;
    transition: width 0.3s ease;
}

.flash-progress span {
    font-size: 10px;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* 热门推荐 */
.hot-section {
    margin-bottom: var(--spacing-lg);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.view-more {
    font-size: 12px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.3s ease;
}

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

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

.product-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-color);
    border-color: var(--primary-color);
}

.product-image {
    position: relative;
    height: 160px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.product-image img {
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

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

.product-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
}

.product-tag.hot {
    background: var(--danger-color);
    color: #fff;
}

.product-tag.new {
    background: var(--success-color);
    color: #fff;
}

.product-tag.recommend {
    background: var(--warning-color);
    color: #fff;
}

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

.product-name {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
    line-height: 1.4;
}

.product-desc {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.3;
}

.product-price {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.product-price .sales {
    font-size: 10px;
    color: var(--text-muted);
}

/* 品牌专区 */
.brand-section {
    margin-bottom: var(--spacing-lg);
}

.brand-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.brand-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.brand-logo {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 12px;
    transition: all 0.3s ease;
}

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

.brand-item:hover .brand-logo {
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

.brand-item span {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 配件精选 */
.accessory-section {
    margin-bottom: var(--spacing-lg);
}

.accessory-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.accessory-card {
    display: flex;
    gap: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.accessory-card:hover {
    transform: translateX(4px);
    border-color: var(--primary-color);
}

.accessory-image {
    width: 100px;
    height: 100px;
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
}

.accessory-image img {
    max-height: 100%;
    object-fit: contain;
}

.accessory-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.accessory-info h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.accessory-info p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.accessory-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--danger-color);
}

/* 服务保障 */
.service-section {
    margin-bottom: var(--spacing-lg);
}

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

.service-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.service-item i {
    font-size: 24px;
    color: var(--primary-color);
}

.service-item span {
    font-size: 11px;
    color: var(--text-secondary);
}

/* 公司信息 */
.company-info {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.company-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.company-header i {
    font-size: 20px;
}

.company-info p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.company-contact {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    font-size: 12px;
    color: var(--text-muted);
}

.company-contact span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 底部导航 */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 999;
    padding-bottom: env(safe-area-inset-bottom);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: var(--text-muted);
    transition: all 0.3s ease;
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-item i {
    font-size: 20px;
}

.nav-item span {
    font-size: 11px;
}

.nav-item.active {
    color: var(--primary-color);
}

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

/* 返回顶部 */
.back-to-top {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + 20px);
    right: 20px;
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    z-index: 998;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.5);
}

/* ========================================
   商品列表页样式
======================================== */

.filter-bar {
    position: fixed;
    top: calc(var(--status-bar-height) + var(--header-height));
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 998;
    padding: var(--spacing-sm) var(--spacing-md);
}

.filter-tabs {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    scrollbar-width: none;
}

.filter-tabs::-webkit-scrollbar {
    display: none;
}

.filter-tab {
    padding: 6px 16px;
    background: var(--bg-secondary);
    border-radius: 16px;
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.filter-tab.active {
    background: var(--gradient-primary);
    color: #fff;
}

.filter-tab:hover {
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.products-page {
    padding-top: calc(var(--status-bar-height) + var(--header-height) + 50px);
}

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

/* ========================================
   商品详情页样式
======================================== */

.detail-page {
    padding-top: calc(var(--status-bar-height) + var(--header-height));
}

.detail-header {
    position: fixed;
    top: var(--status-bar-height);
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    z-index: 999;
    border-bottom: 1px solid var(--border-color);
}

.back-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 16px;
}

.detail-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.detail-gallery {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 320px;
}

.detail-gallery img {
    max-height: 100%;
    object-fit: contain;
}

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

.detail-price-row {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.detail-price {
    font-size: 28px;
    font-weight: 700;
    color: var(--danger-color);
}

.detail-original {
    font-size: 14px;
    color: var(--text-muted);
    text-decoration: line-through;
}

.detail-discount {
    padding: 2px 8px;
    background: var(--danger-color);
    color: #fff;
    border-radius: 4px;
    font-size: 11px;
}

.detail-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.detail-tags {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.detail-tag {
    padding: 4px 10px;
    background: var(--bg-hover);
    border-radius: 4px;
    font-size: 11px;
    color: var(--text-secondary);
}

.detail-section {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.section-label {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.spec-options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.spec-option {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.spec-option.active {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.qty-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.qty-input {
    width: 50px;
    height: 36px;
    text-align: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
}

.detail-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    z-index: 999;
}

.detail-btn {
    flex: 1;
    height: 44px;
    border-radius: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-cart {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-buy {
    background: var(--gradient-primary);
    color: #fff;
}

.detail-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

/* ========================================
   购物车样式
======================================== */

.cart-page {
    padding-top: calc(var(--status-bar-height) + var(--header-height));
}

.cart-list {
    padding: var(--spacing-md);
}

.cart-item {
    display: flex;
    gap: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
}

.cart-checkbox {
    display: flex;
    align-items: center;
}

.cart-checkbox input {
    width: 20px;
    height: 20px;
    accent-color: var(--primary-color);
}

.cart-image {
    width: 100px;
    height: 100px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    flex-shrink: 0;
}

.cart-image img {
    max-height: 100%;
    object-fit: contain;
}

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

.cart-name {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.4;
}

.cart-spec {
    font-size: 12px;
    color: var(--text-secondary);
}

.cart-price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.cart-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 999;
}

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

.cart-total label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 13px;
}

.total-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--danger-color);
}

.btn-checkout {
    padding: 12px 32px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 22px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    cursor: pointer;
}

/* ========================================
   支付页样式
======================================== */

.payment-page {
    padding-top: calc(var(--status-bar-height) + var(--header-height));
    padding-bottom: 100px;
}

.payment-section {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.payment-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.order-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
}

.order-image {
    width: 80px;
    height: 80px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
}

.order-image img {
    max-height: 100%;
    object-fit: contain;
}

.order-info {
    flex: 1;
}

.order-name {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.order-spec {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

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

.address-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
}

.address-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.address-name {
    font-weight: 600;
}

.address-phone {
    color: var(--text-secondary);
    font-size: 13px;
}

.address-detail {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.payment-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.payment-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.payment-method.active {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.payment-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.payment-icon.wechat {
    background: #07c160;
    color: #fff;
}

.payment-icon.alipay {
    background: #1677ff;
    color: #fff;
}

.payment-icon.card {
    background: var(--gradient-primary);
    color: #fff;
}

.payment-name {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
}

.payment-check {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

.payment-method.active .payment-check {
    border-color: var(--primary-color);
    background: var(--primary-color);
}

.payment-method.active .payment-check i {
    color: #fff;
    font-size: 10px;
}

.payment-summary {
    padding: var(--spacing-md);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-size: 13px;
    color: var(--text-secondary);
}

.summary-row.total {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

.summary-row.total .summary-price {
    color: var(--danger-color);
    font-size: 20px;
}

.payment-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 999;
}

.payment-total {
    display: flex;
    flex-direction: column;
}

.payment-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.payment-amount {
    font-size: 24px;
    font-weight: 700;
    color: var(--danger-color);
}

.btn-pay {
    padding: 14px 40px;
    background: var(--gradient-primary);
    color: #fff;
    border-radius: 24px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-pay:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

/* ========================================
   登录注册页样式
======================================== */

.auth-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    padding-top: var(--status-bar-height);
}

.auth-header {
    padding: var(--spacing-xl);
    text-align: center;
}

.auth-logo {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 40px;
    color: #fff;
}

.auth-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

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

.auth-form {
    flex: 1;
    padding: 0 var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    height: 48px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0 var(--spacing-md);
    color: var(--text-primary);
    font-size: 15px;
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.input-group {
    position: relative;
}

.input-group .form-input {
    padding-right: 100px;
}

.btn-code {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    padding: 8px 16px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 12px;
    cursor: pointer;
}

.btn-code:disabled {
    background: var(--bg-hover);
    color: var(--text-muted);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
}

.remember-me input {
    accent-color: var(--primary-color);
}

.forgot-password {
    font-size: 13px;
    color: var(--primary-color);
}

.btn-submit {
    width: 100%;
    height: 48px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: var(--spacing-lg);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 13px;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.social-login {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.social-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.auth-footer {
    text-align: center;
    padding: var(--spacing-lg);
    font-size: 13px;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary-color);
    font-weight: 600;
}

/* 协议勾选 */
.agreement {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: var(--spacing-lg);
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.agreement input {
    margin-top: 2px;
    accent-color: var(--primary-color);
}

.agreement a {
    color: var(--primary-color);
}

/* ========================================
   响应式适配
======================================== */

@media (min-width: 768px) {
    body {
        max-width: 414px;
        margin: 0 auto;
        box-shadow: 0 0 40px rgba(0,0,0,0.5);
    }
    
    .header,
    .status-bar,
    .bottom-nav,
    .filter-bar,
    .detail-header,
    .detail-bottom,
    .cart-bottom,
    .payment-bottom {
        max-width: 414px;
        left: 50%;
        transform: translateX(-50%);
    }
    
    .back-to-top {
        right: calc(50% - 170px);
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-card,
.flash-item,
.accessory-card,
.cart-item {
    animation: fadeIn 0.5s ease forwards;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
}

.empty-state i {
    font-size: 64px;
    color: var(--border-color);
    margin-bottom: var(--spacing-md);
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 14px;
}