/* 产品中心页面专用样式 */
.products-hero {
    background: linear-gradient(135deg, #1f2d5a 0%, #4766ff 100%);
    color: #fff;
    padding: 160px 20px 80px;
    text-align: center;
}

.products-hero h1 {
    font-size: 44px;
    font-weight: 600;
    margin-bottom: 20px;
}

.products-hero p {
    font-size: 18px;
    line-height: 1.8;
    opacity: 0.92;
}

.products-wrap {
    max-width: 1180px;
    margin: 0 auto;
    padding: 40px 20px 80px;
}

/* 侧边产品导航 */
.product-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 50px;
    position: sticky;
    top: 70px;
    z-index: 100;
    background: #fff;
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}

.product-nav a {
    text-decoration: none;
    color: #494949;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    background: #f1f3f5;
    transition: 0.3s;
}

.product-nav a:hover,
.product-nav a.active {
    background: #4766ff;
    color: #fff;
}

/* 产品详情 */
.product-detail {
    display: block;
    max-width: 100%;
    padding: 50px 0;
    border-bottom: 1px solid #eef0f3;
    scroll-margin-top: 140px;
}

.product-detail:last-child {
    border-bottom: none;
}

.product-detail-head {
    text-align: center;
    margin-bottom: 40px;
}

.product-code {
    display: inline-block;
    background: #eef1ff;
    color: #4766ff;
    font-size: 13px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 4px;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.product-detail-head h2 {
    font-size: 30px;
    color: #2e2e2e;
    font-weight: 600;
    margin-bottom: 8px;
}

.product-slogan {
    color: #8b8b8b;
    font-size: 16px;
}

.product-detail-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.product-detail-img img {
    width: 100%;
    height: 380px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.product-desc {
    color: #494949;
    font-size: 16px;
    line-height: 1.9;
    margin-bottom: 22px;
}

.product-points {
    list-style: none;
    margin-bottom: 22px;
}

.product-points li {
    position: relative;
    padding: 6px 0 6px 26px;
    color: #727272;
    font-size: 15px;
    line-height: 1.7;
}

.product-points li::before {
    content: "\f00c";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 6px;
    color: #4766ff;
}

.product-points strong {
    color: #2e2e2e;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.product-tags span {
    background: #eef1ff;
    color: #4766ff;
    font-size: 13px;
    padding: 5px 12px;
    border-radius: 4px;
}

/* ========== 扶阳透灸仪六大优势卡片 ========== */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.advantage-card {
    background: #f9fbfb;
    border: 1px solid #eef1ff;
    border-radius: 12px;
    padding: 28px 24px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #4766ff, #6e86ff);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.advantage-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 36px rgba(71, 102, 255, 0.15);
    border-color: #4766ff;
}

.advantage-card:hover::before {
    transform: scaleX(1);
}

.advantage-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, #eef1ff 0%, #dde4ff 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.advantage-icon i {
    font-size: 28px;
    color: #4766ff;
}

.advantage-card:hover .advantage-icon {
    background: linear-gradient(135deg, #4766ff 0%, #6e86ff 100%);
}

.advantage-card:hover .advantage-icon i {
    color: #fff;
}

.advantage-card h4 {
    font-size: 18px;
    color: #2e2e2e;
    font-weight: 600;
    margin-bottom: 10px;
}

.advantage-card p {
    color: #727272;
    font-size: 14px;
    line-height: 1.7;
}

/* ========== 双效过滤技术详细介绍 ========== */
.dual-filtration-section {
    background: linear-gradient(180deg, #f9fbfb 0%, #ffffff 100%);
}

.dual-filtration-intro {
    max-width: 900px;
    margin: 0 auto 40px;
    text-align: center;
}

.dual-filtration-intro p {
    color: #494949;
    font-size: 17px;
    line-height: 2;
}

.dual-filtration-intro strong {
    color: #4766ff;
    font-weight: 600;
}

.dual-filtration-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    margin-bottom: 50px;
}

.filtration-card {
    background: #fff;
    border: 1px solid #eef0f3;
    border-radius: 16px;
    padding: 36px 32px;
    transition: all 0.35s ease;
    position: relative;
    overflow: hidden;
}

.filtration-card::after {
    content: "";
    position: absolute;
    top: -40px;
    right: -40px;
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, rgba(71, 102, 255, 0.08) 0%, rgba(71, 102, 255, 0) 70%);
    border-radius: 50%;
}

.filtration-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 48px rgba(71, 102, 255, 0.12);
    border-color: #c5d2ff;
}

.filtration-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, #eef1ff 0%, #c5d2ff 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: all 0.35s ease;
}

.filtration-icon i {
    font-size: 32px;
    color: #4766ff;
}

.filtration-card:hover .filtration-icon {
    background: linear-gradient(135deg, #4766ff 0%, #6e86ff 100%);
}

.filtration-card:hover .filtration-icon i {
    color: #fff;
}

.filtration-card h4 {
    font-size: 22px;
    color: #2e2e2e;
    font-weight: 600;
    margin-bottom: 14px;
}

.filtration-card > p {
    color: #494949;
    font-size: 15px;
    line-height: 1.9;
    margin-bottom: 20px;
}

.filtration-points {
    list-style: none;
    padding: 0;
}

.filtration-points li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: #494949;
    font-size: 14px;
    border-top: 1px dashed #eef0f3;
}

.filtration-points li:first-child {
    border-top: none;
}

.filtration-points li i {
    color: #4766ff;
    font-size: 13px;
    width: 18px;
    text-align: center;
}

.filtration-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    background: linear-gradient(135deg, #1f2d5a 0%, #4766ff 100%);
    border-radius: 20px;
    padding: 40px 32px;
    color: #fff;
}

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

.filtration-stat .stat-num {
    font-size: 42px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
    display: block;
    line-height: 1;
}

.filtration-stat .stat-num span {
    font-size: 20px;
    font-weight: 400;
}

.filtration-stat p {
    font-size: 15px;
    opacity: 0.88;
    letter-spacing: 1px;
}

/* ========== 响应式设计 ========== */
@media (max-width: 992px) {
    .product-detail-body {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .products-hero h1 {
        font-size: 32px;
    }

    .product-detail-img img {
        height: 280px;
    }

    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .dual-filtration-grid {
        grid-template-columns: 1fr;
    }

    .filtration-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }
}

@media (max-width: 768px) {
    .products-hero {
        padding: 60px 20px;
    }

    .products-hero h1 {
        font-size: 26px;
    }

    .products-hero p {
        font-size: 15px;
    }

    .products-wrap {
        padding: 20px 16px 60px;
    }

    .product-nav {
        top: 60px;
        gap: 8px;
        padding: 10px;
    }

    .product-nav a {
        font-size: 13px;
        padding: 6px 12px;
    }

    .product-detail {
        padding: 36px 0;
    }

    .product-detail-head h2 {
        font-size: 24px;
    }

    .product-detail-img img {
        height: 220px;
    }

    .product-desc {
        font-size: 15px;
    }

    .advantage-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .advantage-card {
        padding: 24px 20px;
    }

    .dual-filtration-intro p {
        font-size: 15px;
    }

    .filtration-card {
        padding: 28px 24px;
    }

    .filtration-card h4 {
        font-size: 18px;
    }

    .filtration-stats {
        grid-template-columns: repeat(2, 1fr);
        padding: 28px 20px;
        gap: 20px;
    }

    .filtration-stat .stat-num {
        font-size: 32px;
    }
}

@media (max-width: 480px) {
    .products-hero h1 {
        font-size: 22px;
    }

    .product-nav {
        gap: 6px;
        padding: 8px;
    }

    .product-nav a {
        font-size: 12px;
        padding: 5px 10px;
    }

    .product-detail-head h2 {
        font-size: 20px;
    }

    .filtration-stats {
        grid-template-columns: 1fr 1fr;
        padding: 24px 16px;
    }

    .filtration-stat .stat-num {
        font-size: 28px;
    }
}

/* 选购指南板块 */
.buying-guide-section {
    background: linear-gradient(180deg, #f8faff 0%, #ffffff 100%);
    padding: 60px 0;
}

.buying-guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.buying-guide-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
    position: relative;
}

.buying-guide-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 8px 32px rgba(71, 102, 255, 0.12);
    transform: translateY(-4px);
}

.guide-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary-color) 0%, #6b85ff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.guide-icon i {
    font-size: 28px;
    color: #fff;
}

.buying-guide-card h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.guide-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.guide-content ul {
    list-style: none;
    padding: 0;
    margin: 16px 0;
}

.guide-content ul li {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    padding-left: 20px;
    position: relative;
    margin-bottom: 8px;
}

.guide-content ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.guide-content ul li strong {
    color: var(--text-primary);
}

.guide-reason {
    background: linear-gradient(135deg, rgba(71, 102, 255, 0.08) 0%, rgba(107, 133, 255, 0.08) 100%);
    border-left: 3px solid var(--primary-color);
    padding: 12px 16px;
    border-radius: 0 8px 8px 0;
    font-size: 14px !important;
    color: var(--primary-color) !important;
    font-weight: 500;
}

.buying-channel {
    margin-top: 60px;
    text-align: center;
}

.buying-channel h3 {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 30px;
}

.channel-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.channel-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    transition: all 0.3s ease;
}

.channel-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 8px 32px rgba(71, 102, 255, 0.12);
}

.channel-card > i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.channel-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.channel-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.channel-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 500;
    color: var(--primary-color);
    text-decoration: none;
    transition: gap 0.3s ease;
}

.channel-link:hover {
    gap: 12px;
}

.channel-link i {
    font-size: 14px;
}

@media (max-width: 992px) {
    .buying-guide-grid,
    .channel-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .buying-guide-grid,
    .channel-cards {
        grid-template-columns: 1fr;
    }
    
    .buying-guide-card,
    .channel-card {
        padding: 24px;
    }
    
    .buying-channel h3 {
        font-size: 24px;
    }
}