.product-page-container {
        display: flex;
        max-width: 100%;
        margin: 30px auto;
        padding: 0 15px;
    }
    
    /* Left Navigation */
    .product-nav {
        width: 250px;
        background: white;
        border-radius: 5px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        padding: 20px;
        margin-right: 30px;
        position: sticky;
        top: 20px;
        height: fit-content;
    }
    
    .product-nav h2 {
        font-size: 18px;
        margin-bottom: 15px;
        padding-bottom: 10px;
        border-bottom: 1px solid #eee;
        color: #333;
    }
    
    .product-nav ul {
        list-style: none;
    }
    
    .product-nav li {
        margin-bottom: 10px;
    }
    
    .product-nav a {
        display: block;
        padding: 8px 10px;
        color: #555;
        text-decoration: none;
        border-radius: 4px;
        transition: all 0.3s ease;
    }
    
    .product-nav a:hover, 
    .product-nav a.active {
        background-color: #f0f0f0;
        color: #2a6496;
    }
    
    /* Product Detail */
    .product-detail {
        display: flex;
        flex: 1;
        background: white;
        border-radius: 5px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        padding: 30px;
    }
    
    .product-images {
        width: 50%;
        padding-right: 30px;
    }
    
    .product-main-image {
        width: 100%;
        height: auto;
        border-radius: 5px;
    }
    
    .product-info {
        width: 50%;
    }
    
    .product-title {
        font-size: 38px;
        margin-bottom: 15px;
        color: #333;
    }
    
    .product-description {
        margin-bottom: 20px;
        color: #555;
        line-height: 1.6;
    }
    
    .product-price {
        font-size: 22px;
        font-weight: bold;
        color: #2a6496;
        margin-bottom: 25px;
    }
    
    .sample-btn {
        background-color: #2a6496;
        color: white;
        border: none;
        padding: 12px 25px;
        border-radius: 4px;
        cursor: pointer;
        font-size: 16px;
        transition: background-color 0.3s;
    }
    
    .sample-btn:hover {
        background-color: #1d4b75;
    }
    
    /* Email Popup */
        /* Popup Overlay */
    .popup-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.8);
        backdrop-filter: blur(8px);
        z-index: 9999;
        justify-content: center;
        align-items: center;
        opacity: 0;
        transition: opacity 0.3s ease;
    }
    
    .popup-overlay.active {
        display: flex;
        opacity: 1;
    }
    
    /* Popup Content */
    .popup-content {
        background: white;
        width: 100%;
        max-width: 480px;
        border-radius: 16px;
        overflow: hidden;
        box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
        transform: translateY(20px);
        transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    }
    
    .popup-overlay.active .popup-content {
        transform: translateY(0);
    }
    
    /* Popup Header */
    .popup-header {
        background: linear-gradient(135deg, #2a6496 0%, #3a7bb8 100%);
        padding: 24px;
        color: white;
    }
    
    .popup-title {
        margin: 0;
        font-size: 22px;
        font-weight: 600;
        letter-spacing: 0.5px;
    }
    
    /* Popup Body */
    .popup-body {
        padding: 30px;
    }
    
    /* Form Styles */
    .popup-form input[type="email"] {
        width: 100%;
        padding: 16px;
        margin-bottom: 20px;
        border: 1px solid #e0e3e6;
        border-radius: 8px;
        font-size: 15px;
        transition: all 0.3s;
        background-color: #f8fafc;
    }
    
    .popup-form input[type="email"]:focus {
        outline: none;
        border-color: #2a6496;
        box-shadow: 0 0 0 3px rgba(42, 100, 150, 0.15);
        background-color: #fff;
    }
    
    /* Popup Footer */
    .popup-footer {
        display: flex;
        justify-content: flex-end;
        gap: 12px;
        padding: 0 30px 30px;
    }
    
    .popup-btn {
        padding: 12px 28px;
        border: none;
        border-radius: 8px;
        font-size: 15px;
        font-weight: 500;
        cursor: pointer;
        transition: all 0.3s ease;
    }
    
    .cancel-btn {
        background: #f1f3f5;
        color: #5c6b7a;
    }
    
    .cancel-btn:hover {
        background: #e1e5e9;
        transform: translateY(-1px);
    }
    
    .submit-btn {
        background: linear-gradient(135deg, #2a6496 0%, #3a7bb8 100%);
        color: white;
        box-shadow: 0 4px 15px rgba(42, 100, 150, 0.25);
    }
    
    .submit-btn:hover {
        background: linear-gradient(135deg, #235787 0%, #2f6aa3 100%);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(42, 100, 150, 0.35);
    }
    
    .submit-btn:active {
        transform: translateY(0);
    }
    
    /* Success Message */
    .success-message {
        display: none;
        text-align: center;
        padding: 40px 30px;
    }
    
    .success-icon {
        font-size: 60px;
        color: #4CAF50;
        margin-bottom: 20px;
    }
    
    .success-text {
        font-size: 18px;
        color: #333;
        margin-bottom: 30px;
    }


/* Add these styles to your existing CSS */
.product-content-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.details-section {
    background: white;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 30px;
}

.details {
    background: #ffffff;
    border-radius: 8px;
    padding: 25px;
}

.details-title {
    font-size: 22px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid #f0f0f0;
}
.video-wrapper {
    position: relative;
    padding-bottom: 33.75%; /* 60% of 56.25% (16:9) */
    height: 0;
    overflow: hidden;
    margin: 0 auto; /* 水平居中 */
    width: 60%; /* 与iframe同宽 */
}

.video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%; /* 占满容器 */
    height: 100%;
    border-radius: 5px;
}
.seo {
  font-family: 'Arial', sans-serif;
  max-width: 1200px;
  margin: 0 auto;
  padding: 30px 20px;
  color: #333;
  line-height: 1.6;
}

.seo h2 {
  font-size: 28px;
  color: #222;
  margin: 40px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid #eaeaea;
  font-weight: 600;
}

.seo h3 {
  font-size: 24px;
  color: #2a5885;
  margin: 30px 0 15px;
  font-weight: 500;
}

.seo h4 {
  font-size: 20px;
  color: #444;
  margin: 25px 0 10px;
  font-weight: 500;
}

.seo p {
  font-size: 16px;
  margin-bottom: 15px;
  color: #555;
}

.seo ul {
  margin: 20px 0;
  padding-left: 20px;
}

.seo li {
  margin-bottom: 10px;
  position: relative;
  padding-left: 15px;
}

.seo li:before {
  content: "•";
  color: #2a5885;
  font-weight: bold;
  position: absolute;
  left: 0;
}

.seo strong {
  color: #2a5885;
  font-weight: 600;
}
/* 响应式设计 - 添加到现有CSS中 */
@media (max-width: 1200px) {
    .product-page-container {
        max-width: 95%;
    }
}

@media (max-width: 992px) {
    .product-detail {
        flex-direction: column;
    }
    
    .product-images,
    .product-info {
        width: 100%;
        padding-right: 0;
    }
    
    .product-images {
        margin-bottom: 30px;
    }
    
    .product-nav {
        width: 200px;
    }
}

@media (max-width: 768px) {
    .product-page-container {
        flex-direction: column;
    }
    
    .product-nav {
        width: 100%;
        position: static;
        margin-right: 0;
        margin-bottom: 20px;
    }
    
    .product-title {
        font-size: 32px;
    }
    
    .details-section,
    .product-detail {
        padding: 20px;
    }
    
    .seo h2 {
        font-size: 24px;
        margin: 30px 0 15px;
    }
    
    .seo h3 {
        font-size: 20px;
    }
    
    .seo h4 {
        font-size: 18px;
    }
    
    .popup-content {
        max-width: 90%;
    }
}

@media (max-width: 576px) {
    .product-title {
        font-size: 28px;
    }
    
    .product-price {
        font-size: 20px;
    }
    
    .sample-btn {
        width: 100%;
        padding: 15px;
    }
    
    .popup-header {
        padding: 15px;
    }
    
    .popup-body {
        padding: 20px;
    }
    
    .popup-footer {
        flex-direction: column;
        gap: 10px;
        padding: 0 20px 20px;
    }
    
    .popup-btn {
        width: 100%;
    }
    
    .seo {
        padding: 20px 15px;
    }
    
    .details-title {
        font-size: 20px;
    }
    
    /* 调整MOQ缩进 */
    .product-info ul span[style*="padding-left"] {
        padding-left: 20px !important;
    }
}

/* 移动设备特定调整 */
@media (max-width: 480px) {
    .product-nav ul {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .product-nav li {
        margin-bottom: 5px;
    }
    
    .popup-form input[type="email"] {
        padding: 12px;
    }
    
    .success-icon {
        font-size: 48px;
    }
    
    .success-text {
        font-size: 16px;
    }
}

/* 横屏手机优化 */
@media (max-height: 500px) and (orientation: landscape) {
    .popup-content {
        max-height: 90vh;
        overflow-y: auto;
    }
}

/* 高DPI设备优化 */
@media 
(-webkit-min-device-pixel-ratio: 2), 
(min-resolution: 192dpi) { 
    .product-main-image {
        border: 1px solid #f0f0f0;
    }
}