body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 0;
    color: #333;
    line-height: 1.6;
}

.promotion-banner {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    text-align: center;
    padding: 25px 0;
    margin-bottom: 40px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.promotion-banner h1 {
    margin: 0;
    font-size: 2.8em;
    letter-spacing: 2px;
}

.slogan {
    font-size: 1.3em;
    margin: 15px 0 0;
    font-weight: 300;
    opacity: 0.9;
}

.product-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.product-item {
    position: relative;
    width: 85%;
    max-width: 1000px;
    margin: 0 auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    overflow: hidden;
    background-color: white;
    display: flex;
}

.product-image {
    width: 55%;
    height: 550px;
    object-fit: cover;
    object-position: center;
}

.product-info {
    width: 45%;
    padding: 40px;
    box-sizing: border-box;
}

.product-info h2 {
    color: #222;
    font-size: 2em;
    margin: 0 0 10px;
    font-weight: 600;
}

.product-desc {
    color: #666;
    font-size: 1em;
    margin: 0 0 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.original-price {
    text-decoration: line-through;
    color: #999;
    font-size: 1.3em;
    margin: 20px 0 5px;
}

.current-price {
    color: #e74c3c;
    font-size: 2.2em;
    font-weight: bold;
    margin: 5px 0 10px;
}

.current-price span {
    font-size: 1.5em;
}

.discount-tag {
    display: inline-block;
    background-color: #f1c40f;
    color: #333;
    padding: 5px 15px;
    border-radius: 4px;
    font-size: 1em;
    margin: 0 0 20px;
}

.promo-tag {
    display: inline-block;
    background: linear-gradient(45deg, #e74c3c, #c0392b);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 1em;
    margin: 0 0 30px;
    box-shadow: 0 4px 8px rgba(231, 76, 60, 0.2);
}

.buy-btn {
    background: linear-gradient(45deg, #2c3e50, #34495e);
    color: white;
    border: none;
    padding: 15px 0;
    font-size: 1.2em;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    transition: all 0.3s;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.buy-btn:hover {
    background: linear-gradient(45deg, #34495e, #2c3e50);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.shipping-info {
    color: #3498db;
    font-size: 0.9em;
    text-align: center;
    margin: 0;
}

/* 促销标签样式 - 响应式 */
.product-item.promo::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 150px;
    height: 150px;
    background-image: url('../../../img/左上角.png');
    background-size: contain;
    background-repeat: no-repeat;
    z-index: 10;
}

.product-item.promo::after {
    content: "";
    position: absolute;
    bottom: 0;
    right: 50%;
    width: 150px;
    height: 140px;
    background-image: url('../../../img/右下角.png');
    background-size: contain;
    background-repeat: no-repeat;
    z-index: 10;
}

.promo-footer {
    text-align: center;
    margin-top: 50px;
    padding: 25px;
    background-color: #ecf0f1;
    font-size: 1em;
    color: #2c3e50;
}

.promo-footer p {
    margin: 10px 0;
    font-weight: 500;
}

@media (max-width: 768px) {
    .product-item {
        flex-direction: column;
        width: 95%;
    }

    .product-image {
        width: 100%;
        height: 400px;
    }

    .product-info {
        width: 100%;
        padding: 25px;
    }

    .product-item.promo::before,
    .product-item.promo::after {
        width: 100px;
        height: 100px;
    }

    .promotion-banner h1 {
        font-size: 2em;
    }

    .slogan {
        font-size: 1.1em;
    }
}