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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 导航栏 */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: bold;
    font-size: 18px;
}

.menu-icon {
    display: none;
    cursor: pointer;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #ff6b35;
}

.nav-icons {
    display: flex;
    gap: 20px;
    font-size: 18px;
}

.nav-icons i {
    cursor: pointer;
    transition: color 0.3s;
}

.nav-icons i:hover {
    color: #ff6b35;
}

/* 产品容器 */
.product-container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
}

.product-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

/* 产品图片区域 */
.product-images {
    position: relative;
}

.main-image {
    position: relative;
    margin-bottom: 20px;
    border-radius: 12px;
    overflow: hidden;
}

.main-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.image-badges {
    position: absolute;
    top: 15px;
    left: 15px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
    color: white;
}

.badge.hot {
    background: #ff4757;
}

.badge.new {
    background: #2ed573;
}

.thumbnail-images {
    display: flex;
    gap: 10px;
    overflow-x: auto;
}

.thumbnail {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s;
}

.thumbnail:hover,
.thumbnail.active {
    border-color: #ff6b35;
    transform: scale(1.05);
}

/* 产品信息区域 */
.product-info {
    padding: 20px 0;
}

.product-title {
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 10px;
    color: #2c3e50;
}

.product-subtitle {
    color: #7f8c8d;
    margin-bottom: 20px;
    font-size: 16px;
}

.highlight {
    color: #ff6b35;
    font-weight: 600;
}

.price-section {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

.current-price {
    font-size: 32px;
    font-weight: bold;
    color: #ff6b35;
}

.original-price {
    font-size: 18px;
    color: #95a5a6;
    text-decoration: line-through;
}

.discount {
    background: #ff6b35;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

/* 产品选项 */
.option-group {
    margin-bottom: 25px;
}

.option-label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: #2c3e50;
}

.color-options {
    display: flex;
    gap: 15px;
}

.color-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
    border-radius: 8px;
    transition: all 0.3s;
}

.color-option:hover,
.color-option.active {
    background: #f8f9fa;
    transform: translateY(-2px);
}

.color-circle {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid #ddd;
}

.color-option.active .color-circle {
    border-color: #ff6b35;
    box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.3);
}

.strap-options {
    display: flex;
    gap: 10px;
}

.strap-option {
    padding: 8px 16px;
    border: 2px solid #ddd;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.strap-option:hover,
.strap-option.active {
    border-color: #ff6b35;
    background: #fff5f3;
    color: #ff6b35;
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: 0;
    width: fit-content;
    border: 2px solid #ddd;
    border-radius: 6px;
    overflow: hidden;
}

.qty-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: #f8f9fa;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
    transition: background 0.3s;
}

.qty-btn:hover {
    background: #e9ecef;
}

.qty-input {
    width: 60px;
    height: 40px;
    border: none;
    text-align: center;
    font-size: 16px;
    font-weight: 600;
}

/* 购买按钮 */
.purchase-buttons {
    display: flex;
    gap: 15px;
    margin: 30px 0;
}

.btn {
    flex: 1;
    padding: 15px 20px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-ar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: 2px solid transparent;
}

.btn-ar:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-buy {
    background: #ff6b35;
    color: white;
}

.btn-buy:hover {
    background: #e55a2b;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

/* 产品特性 */
.product-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #eee;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 8px;
}

.feature-item i {
    color: #ff6b35;
    font-size: 18px;
}

/* 推荐产品区域 */
.recommended-section {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

.section-title {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
    text-align: center;
    color: #2c3e50;
}

.recommended-products {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
}

.product-card {
    background: white;
    border-radius: 12px;
    padding: 15px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.product-card:hover {
    transform: translateY(-5px);
}

.product-card img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 10px;
}

.product-card h3 {
    font-size: 16px;
    margin-bottom: 5px;
    color: #2c3e50;
}

.product-card .price {
    color: #ff6b35;
    font-weight: bold;
    font-size: 18px;
}

/* 智能亮点区域 */
.highlights-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
    margin: 40px 0;
}

.highlights-section .section-title {
    color: white;
    font-size: 32px;
    margin-bottom: 10px;
}

.section-subtitle {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.sports-icons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 40px;
}

.sport-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px;
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    transition: transform 0.3s;
}

.sport-icon:hover {
    transform: translateY(-5px);
}

.sport-icon i {
    font-size: 24px;
}

.sport-icon span {
    font-size: 14px;
}

.watch-display {
    margin-top: 40px;
}

.large-watch-image {
    max-width: 400px;
    width: 100%;
    height: auto;
    border-radius: 20px;
}

/* 表盘定制区域 */
.customization-section {
    max-width: 1200px;
    margin: 60px auto;
    padding: 0 20px;
    text-align: center;
}

.section-description {
    max-width: 600px;
    margin: 0 auto 40px;
    color: #7f8c8d;
    line-height: 1.8;
}

.watch-faces {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.watch-face {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid #ddd;
    transition: all 0.3s;
    cursor: pointer;
}

.watch-face:hover {
    border-color: #ff6b35;
    transform: scale(1.1);
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background: white;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: 40px 20px;
        box-shadow: 0 4px 20px rgba(0,0,0,0.1);
        transition: left 0.3s ease;
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        padding: 15px 0;
        font-size: 18px;
        border-bottom: 1px solid #eee;
        width: 100%;
        text-align: center;
    }
    
    .menu-icon {
        display: block;
        font-size: 20px;
    }
    
    .nav-icons {
        gap: 15px;
        font-size: 16px;
    }
    
    .product-container {
        margin: 10px auto;
        padding: 0 15px;
    }
    
    .product-main {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px 15px;
        margin: 0;
    }
    
    .main-image img {
        height: 280px;
    }
    
    .thumbnail-images {
        justify-content: center;
        padding: 0 10px;
    }
    
    .thumbnail {
        width: 60px;
        height: 60px;
        flex-shrink: 0;
    }
    
    .product-info {
        padding: 10px 0;
    }
    
    .product-title {
        font-size: 22px;
        line-height: 1.3;
    }
    
    .product-subtitle {
        font-size: 14px;
        line-height: 1.4;
    }
    
    .price-section {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .current-price {
        font-size: 26px;
    }
    
    .original-price {
        font-size: 16px;
    }
    
    .color-options {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .color-option {
        padding: 8px;
    }
    
    .strap-options {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .strap-option {
        padding: 10px 15px;
        font-size: 14px;
    }
    
    .purchase-buttons {
        flex-direction: column;
        gap: 12px;
    }
    
    .btn {
        padding: 16px 20px;
        font-size: 16px;
    }
    
    .product-features {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .feature-item {
        padding: 12px;
        font-size: 14px;
    }
    
    .recommended-products {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .product-card {
        padding: 12px;
    }
    
    .product-card img {
        height: 100px;
    }
    
    .product-card h3 {
        font-size: 14px;
    }
    
    .product-card .price {
        font-size: 16px;
    }
    
    .highlights-section {
        padding: 40px 15px;
    }
    
    .highlights-section .section-title {
        font-size: 26px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .sports-icons {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 15px;
        max-width: 320px;
        margin: 0 auto 40px;
    }
    
    .sport-icon {
        padding: 12px 8px;
    }
    
    .sport-icon i {
        font-size: 20px;
    }
    
    .sport-icon span {
        font-size: 12px;
    }
    
    .large-watch-image {
        max-width: 280px;
    }
    
    .customization-section {
        padding: 0 15px;
    }
    
    .section-description {
        font-size: 14px;
        line-height: 1.6;
    }
    
    .watch-faces {
        gap: 12px;
        justify-content: center;
    }
    
    .watch-face {
        width: 70px;
        height: 70px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 12px;
        height: 55px;
    }
    
    .nav-brand {
        font-size: 16px;
    }
    
    .nav-icons {
        gap: 12px;
        font-size: 14px;
    }
    
    .product-container {
        margin: 8px auto;
        padding: 0 12px;
    }
    
    .product-main {
        padding: 15px 12px;
        border-radius: 8px;
    }
    
    .main-image {
        margin-bottom: 15px;
    }
    
    .main-image img {
        height: 250px;
        border-radius: 8px;
    }
    
    .thumbnail {
        width: 50px;
        height: 50px;
    }
    
    .product-title {
        font-size: 20px;
    }
    
    .product-subtitle {
        font-size: 13px;
        margin-bottom: 15px;
    }
    
    .current-price {
        font-size: 24px;
    }
    
    .original-price {
        font-size: 14px;
    }
    
    .discount {
        font-size: 11px;
        padding: 3px 6px;
    }
    
    .option-group {
        margin-bottom: 20px;
    }
    
    .option-label {
        font-size: 14px;
        margin-bottom: 8px;
    }
    
    .color-option span {
        font-size: 12px;
    }
    
    .color-circle {
        width: 25px;
        height: 25px;
    }
    
    .strap-option {
        padding: 8px 12px;
        font-size: 13px;
    }
    
    .qty-btn {
        width: 35px;
        height: 35px;
        font-size: 16px;
    }
    
    .qty-input {
        width: 50px;
        height: 35px;
        font-size: 14px;
    }
    
    .btn {
        padding: 14px 18px;
        font-size: 15px;
    }
    
    .feature-item {
        padding: 10px;
        font-size: 13px;
    }
    
    .feature-item i {
        font-size: 16px;
    }
    
    .recommended-section {
        margin: 30px auto;
    }
    
    .section-title {
        font-size: 20px;
        margin-bottom: 15px;
    }
    
    .recommended-products {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .product-card {
        padding: 10px;
    }
    
    .product-card img {
        height: 80px;
    }
    
    .product-card h3 {
        font-size: 13px;
        margin-bottom: 4px;
    }
    
    .product-card .price {
        font-size: 15px;
    }
    
    .highlights-section {
        padding: 30px 12px;
        margin: 30px 0;
    }
    
    .highlights-section .section-title {
        font-size: 22px;
        margin-bottom: 8px;
    }
    
    .section-subtitle {
        font-size: 14px;
        margin-bottom: 30px;
    }
    
    .sports-icons {
        grid-template-columns: repeat(4, 1fr);
        gap: 10px;
        max-width: 280px;
        margin-bottom: 30px;
    }
    
    .sport-icon {
        padding: 8px 4px;
    }
    
    .sport-icon i {
        font-size: 18px;
    }
    
    .sport-icon span {
        font-size: 11px;
    }
    
    .large-watch-image {
        max-width: 240px;
    }
    
    .customization-section {
        margin: 40px auto;
        padding: 0 12px;
    }
    
    .section-description {
        font-size: 13px;
        margin-bottom: 30px;
    }
    
    .watch-faces {
        gap: 10px;
    }
    
    .watch-face {
        width: 60px;
        height: 60px;
    }
}

/* 平板适配 */
@media (min-width: 769px) and (max-width: 1024px) {
    .product-main {
        gap: 30px;
    }
    
    .recommended-products {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .sports-icons {
        gap: 25px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .btn {
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .thumbnail {
        min-width: 44px;
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .color-option {
        min-width: 44px;
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .strap-option {
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .qty-btn {
        min-width: 44px;
        min-height: 44px;
        touch-action: manipulation;
    }
    
    .menu-icon {
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        touch-action: manipulation;
    }
    
    .nav-icons i {
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        touch-action: manipulation;
    }
    
    /* 移除悬停效果，添加点击效果 */
    .btn:hover {
        transform: none;
        box-shadow: none;
    }
    
    .btn:active {
        transform: scale(0.98);
        transition: transform 0.1s;
    }
    
    .thumbnail:hover {
        transform: none;
        border-color: transparent;
    }
    
    .thumbnail:active {
        transform: scale(0.95);
        transition: transform 0.1s;
    }
    
    .product-card:hover {
        transform: none;
    }
    
    .product-card:active {
        transform: scale(0.98);
        transition: transform 0.1s;
    }
    
    .sport-icon:hover {
        transform: none;
    }
    
    .sport-icon:active {
        transform: scale(0.95);
        transition: transform 0.1s;
    }
}

/* 超小屏幕优化 */
@media (max-width: 320px) {
    .nav-container {
        padding: 0 10px;
    }
    
    .product-container {
        padding: 0 10px;
    }
    
    .product-main {
        padding: 12px 10px;
    }
    
    .main-image img {
        height: 220px;
    }
    
    .product-title {
        font-size: 18px;
    }
    
    .current-price {
        font-size: 22px;
    }
    
    .sports-icons {
        grid-template-columns: repeat(3, 1fr);
        max-width: 240px;
    }
    
    .large-watch-image {
        max-width: 200px;
    }
    
    .watch-face {
        width: 50px;
        height: 50px;
    }
}