.register-btn {
    display: inline-block;
    margin-top: 32px;
    padding: 18px 48px;
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(90deg, #e60012 60%, #b8000f 100%);
    border: none;
    border-radius: 32px;
    box-shadow: 0 6px 24px rgba(230,0,18,0.12);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    letter-spacing: 2px;
    text-decoration: none;
}
.register-btn:hover {
    background: linear-gradient(90deg, #b8000f 60%, #e60012 100%);
    transform: translateY(-2px) scale(1.04);
}

.features-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 18px;
}
.features-list li {
    background: #f6f6f6;
    border-radius: 8px;
    padding: 18px 16px;
    font-size: 1.08rem;
    color: #333;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

.categories {
    background: #f8f8fc;
}
.category-list {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    margin-top: 12px;
}
.category-item {
    display: inline-block;
    background: #fff;
    color: var(--accent-color);
    border: 1.5px solid var(--accent-color);
    border-radius: 24px;
    padding: 10px 28px;
    font-size: 1.08rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
}
.category-item:hover {
    background: var(--accent-color);
    color: #fff;
}

.products-tabs {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 40px;
}

.tab-btn {
    padding: 12px 24px;
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    background: #fff;
    color: #666;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn.active, .tab-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: rgba(230,0,18,0.05);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-bottom: 40px;
}

.product-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: transform 0.2s, box-shadow 0.2s;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

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

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

.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--accent-color);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.product-badge.discount {
    background: #ff6b35;
}

.product-badge.new {
    background: #28a745;
}

.product-info {
    padding: 20px;
}

.product-info h4 {
    font-size: 1.2rem;
    color: var(--main-color);
    margin-bottom: 8px;
}

.product-desc {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.product-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.rating-count {
    color: #999;
    font-size: 0.85rem;
}

.product-price {
    display: flex;
    align-items: center;
    gap: 12px;
}

.current-price {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-color);
}

.original-price {
    font-size: 1rem;
    color: #999;
    text-decoration: line-through;
}

.point-back {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.9rem;
    margin-left: 8px;
}

.category-description {
    text-align: center;
    margin-top: 32px;
    padding: 24px;
    background: #f8f9ff;
    border-radius: 12px;
}

.category-description p {
    color: #666;
    font-size: 1.05rem;
    line-height: 1.6;
    margin: 0;
}

.contact-form select {
    padding: 14px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
    background: #fff;
}

.contact-form select:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-note {
    font-size: 0.9rem;
    color: #666;
    text-align: center;
    margin-top: 16px;
    margin-bottom: 0;
}

.view-more {
    text-align: center;
}

.view-more-btn {
    display: inline-block;
    padding: 16px 40px;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
}

.view-more-btn:hover {
    background: var(--accent-color);
    color: #fff;
}

@media (max-width: 700px) {
    .hot-products .product-list {
        flex-direction: column;
        gap: 18px;
    }
    .category-list {
        gap: 10px;
    }
    .features-list {
        grid-template-columns: 1fr;
    }
}
/* Rakuten 官网高级简洁风格 */

:root {
    --main-color: #1a1a1a;
    --accent-color: #e60012;
    --bg-color: #f8f8f8;
    --text-color: #222;
    --border-radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.06);
}

html, body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

header {
    background: #fff;
    box-shadow: var(--shadow);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-color);
    margin: 0;
    letter-spacing: 2px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 2rem;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 32px;
    margin: 0;
    padding: 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.login-link, .cart-link {
    text-decoration: none;
    color: var(--main-color);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: background 0.2s;
}

.login-link:hover, .cart-link:hover {
    background: #f0f0f0;
}
nav a {
    text-decoration: none;
    color: var(--main-color);
    font-weight: 500;
    font-size: 1.05rem;
    transition: color 0.2s;
}
nav a:hover {
    color: var(--accent-color);
}

.hero {
    background: linear-gradient(135deg, #fff 0%, #f8f9ff 50%, #fff 100%);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 40%;
    height: 200%;
    background: linear-gradient(45deg, rgba(230,0,18,0.05) 0%, transparent 70%);
    transform: rotate(15deg);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text h2 {
    font-size: 3rem;
    color: var(--main-color);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.3rem;
    color: #555;
    margin-bottom: 30px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-item strong {
    display: block;
    font-size: 2rem;
    color: var(--accent-color);
    font-weight: 700;
}

.stat-item span {
    font-size: 0.9rem;
    color: #666;
    margin-top: 4px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    align-items: center;
}

.learn-more-btn {
    padding: 14px 32px;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    border-radius: 32px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
}

.learn-more-btn:hover {
    background: var(--accent-color);
    color: #fff;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.visual-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    transform: rotate(12deg);
}

.visual-card {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #fff 0%, #f0f0f0 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    animation: float 3s ease-in-out infinite;
}

.visual-card:nth-child(1) { animation-delay: 0s; }
.visual-card:nth-child(2) { animation-delay: 1s; }
.visual-card:nth-child(3) { animation-delay: 2s; }

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

section {
    margin: 48px 0;
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 60px 0;
}
section h3 {
    font-size: 2.2rem;
    color: var(--accent-color);
    margin-bottom: 16px;
    text-align: center;
}
section p {
    color: #444;
    font-size: 1.1rem;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.highlight-item h4 {
    color: var(--accent-color);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.highlight-item p {
    color: #666;
    font-size: 0.95rem;
    margin: 0;
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.image-placeholder span {
    font-size: 4rem;
    margin-bottom: 10px;
}

.image-placeholder p {
    color: #666;
    font-weight: 600;
    margin: 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-icon {
    font-size: 1.5rem;
    margin-top: 4px;
}

.contact-item strong {
    display: block;
    color: var(--main-color);
    margin-bottom: 4px;
}

.contact-item p {
    color: #666;
    margin: 0;
}

.contact-form {
    background: #f8f9ff;
    padding: 30px;
    border-radius: 16px;
}

.contact-form h4 {
    color: var(--main-color);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.contact-form form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    padding: 14px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.submit-btn {
    padding: 14px 24px;
    background: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.submit-btn:hover {
    background: #b8000f;
}

footer {
    background: #1a1a1a;
    color: #fff;
    padding: 60px 0 20px;
    margin-top: 48px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: var(--accent-color);
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section li {
    margin-bottom: 8px;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: #fff;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.social-link {
    color: #ccc !important;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.social-link:hover {
    color: var(--accent-color) !important;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    color: #999;
    margin: 0;
}

.footer-bottom a {
    color: var(--accent-color);
    text-decoration: none;
}

@media (max-width: 700px) {
    .container {
        padding: 0 12px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 16px;
    }
    
    nav ul {
        gap: 16px;
        flex-wrap: wrap;
    }
    
    .header-actions {
        order: -1;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-text h2 {
        font-size: 2rem;
    }
    
    .hero-stats {
        justify-content: center;
        gap: 20px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    section {
        padding: 40px 0;
    }
    
    .features-list {
        grid-template-columns: 1fr;
    }
}