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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

.navbar {
    margin-bottom: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid #eef2f8;
    flex-wrap: wrap;
    gap: 0.8rem;
    position: relative;
    z-index: 1000;
}
.navbar .logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1e3a5f;
    letter-spacing: -0.3px;
    text-decoration: none;
}
.logo span {
    color: #5685a8;
}
.nav-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.nav-links {
    display: flex;
    gap: 0.3rem;
    list-style: none;
}
.nav-item {
    position: relative;
}
.nav-item > a {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.6rem 1rem;
    text-decoration: none;
    color: #5a6e7c;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s;
    border-radius: 0.5rem;
}
.nav-item > a:hover, .nav-item > a.active {
    color: #2c6280;
    background: rgba(44, 98, 128, 0.08);
}
.nav-item > a .arrow {
    font-size: 0.7rem;
    transition: transform 0.2s;
}
.nav-item:hover > a .arrow {
    transform: rotate(180deg);
}
.nav-item .arrow {
    font-size: 10px;
}

.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: #fff;
    border-radius: 1rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.12);
    padding: 0.8rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1001;
}
.nav-item:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown a {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.7rem 1.2rem;
    text-decoration: none;
    color: #5a6e7c;
    font-size: 0.85rem;
    transition: all 0.2s;
}
.dropdown a:hover {
    background: #f0f4f8;
    color: #2c6280;
}
.dropdown a .icon {
    font-size: 1rem;
}
.dropdown-divider {
    height: 1px;
    background: #eef2f8;
    margin: 0.5rem 0;
}
.dropdown-title {
    padding: 0.5rem 1.2rem;
    font-size: 0.75rem;
    color: #9aaebf;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}
.nav-btn {
    background: linear-gradient(135deg, #ff6b35, #ff8f5a);
    padding: 0.6rem 1.4rem;
    border-radius: 2rem;
    text-decoration: none;
    color: white;
    font-weight: 500;
    font-size: 0.85rem;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.25);
}
.nav-btn:hover {
    background: linear-gradient(135deg, #e55a28, #ff6b35);
    box-shadow: 0 6px 16px rgba(255, 107, 53, 0.35);
    transform: translateY(-2px);
}
.nav-login {
    color: #5a6e7c;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.6rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
}
.nav-login:hover {
    color: #2c6280;
    background: rgba(44, 98, 128, 0.08);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
}
.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: #5a6e7c;
    margin: 5px 0;
    border-radius: 2px;
    transition: all 0.3s;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 15px 0;
    font-size: 13px;
    color: #999;
}

.breadcrumb a {
    color: #5a7388;
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb a:hover {
    color: #2c6280;
}

.breadcrumb .separator {
    color: #ccc;
}

.article-main {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 25px;
    margin-bottom: 40px;
}

.article-container {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.article-header {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid #f0f0f0;
}

.article-category {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, #5a7388, #2c6280);
    color: #fff;
    font-size: 12px;
    border-radius: 4px;
    margin-bottom: 15px;
}

.article-title {
    font-size: 1.8rem;
    color: #333;
    line-height: 1.4;
    margin-bottom: 15px;
    font-weight: 600;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 20px;
    color: #999;
    font-size: 13px;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.article-meta .author {
    color: #5a7388;
    font-weight: 500;
}

.article-featured-image {
    width: 100%;
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 30px;
}

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

.article-content {
    font-size: 15px;
    line-height: 1.8;
    color: #444;
}

.article-content p {
    margin-bottom: 20px;
    text-indent: 2em;
}

.article-content h2 {
    font-size: 1.4rem;
    color: #333;
    margin: 30px 0 15px;
    padding-left: 15px;
    border-left: 4px solid #5a7388;
}

.article-content h3 {
    font-size: 1.2rem;
    color: #444;
    margin: 25px 0 12px;
}

.article-content ul, .article-content ol {
    margin: 15px 0;
    padding-left: 25px;
}

.article-content li {
    margin-bottom: 8px;
}

.article-content blockquote {
    margin: 20px 0;
    padding: 15px 20px;
    background: linear-gradient(135deg, rgba(90,115,136,0.08), rgba(44,98,128,0.08));
    border-left: 4px solid #5a7388;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: #555;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 20px 0;
}

.article-content a {
    color: #5a7388;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s;
}

.article-content a:hover {
    border-bottom-color: #5a7388;
}

.article-tags {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #f0f0f0;
    flex-wrap: wrap;
}

.article-tags .label {
    font-size: 13px;
    color: #666;
    font-weight: 500;
}

.article-tag {
    padding: 5px 12px;
    background: #f5f5f5;
    color: #666;
    font-size: 12px;
    border-radius: 15px;
    text-decoration: none;
    transition: all 0.3s;
}

.article-tag:hover {
    background: linear-gradient(135deg, #5a7388, #2c6280);
    color: #fff;
}

.article-share {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-top: 25px;
    padding: 20px;
    background: linear-gradient(135deg, rgba(90,115,136,0.05), rgba(44,98,128,0.05));
    border-radius: 10px;
}

.article-share .label {
    font-size: 14px;
    color: #666;
    font-weight: 500;
}

.share-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border: 1px solid #e5e5e5;
    color: #666;
    cursor: pointer;
    transition: all 0.3s;
}

.share-btn:hover {
    background: #5a7388;
    color: #fff;
    border-color: #5a7388;
    transform: translateY(-2px);
}

.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
    padding-top: 25px;
    border-top: 1px solid #f0f0f0;
}

.article-nav-item {
    padding: 15px;
    background: #f9f9f9;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s;
}

.article-nav-item:hover {
    background: rgba(90,115,136,0.1);
}

.article-nav-item.next {
    text-align: right;
}

.article-nav-label {
    font-size: 12px;
    color: #999;
    margin-bottom: 5px;
}

.article-nav-title {
    font-size: 14px;
    color: #333;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-articles {
    margin-top: 40px;
}

.related-articles-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.related-articles-title {
    font-size: 1.2rem;
    color: #333;
    display: flex;
    align-items: center;
    gap: 8px;
}

.related-articles-title::before {
    content: '';
    width: 4px;
    height: 18px;
    background: linear-gradient(180deg, #5a7388, #5a7388);
    border-radius: 2px;
}

.related-articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.related-article-item {
    background: #f9f9f9;
    border-radius: 10px;
    overflow: hidden;
    text-decoration: none;
    transition: all 0.3s;
}

.related-article-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.related-article-img {
    width: 100%;
    height: 140px;
    object-fit: cover;
    display: none;
}

.related-article-content {
    padding: 15px;
}

.related-article-title {
    font-size: 18px;
    color: #333;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 10px;
}

.related-article-date {
    font-size: 12px;
    color: #999;
}

.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar-card {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
}

.sidebar-card h3 {
    font-size: 1rem;
    color: #333;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-card h3::before {
    content: '';
    width: 4px;
    height: 14px;
    background: linear-gradient(180deg, #5a7388, #5a7388);
    border-radius: 2px;
}

.hot-news-list {
    list-style: none;
}

.hot-news-item {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid #f5f5f5;
}

.hot-news-item:last-child {
    border-bottom: none;
}

.hot-rank {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #5a7388, #5a7388);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    flex-shrink: 0;
}

.hot-rank.top {
    background: linear-gradient(135deg, #ff6b35, #ff8f5a);
}

.hot-news-info {
    flex: 1;
}

.hot-news-title {
    font-size: 13px;
    color: #333;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 5px;
    transition: color 0.3s;
}

.hot-news-title a {
    color: #333;
    text-decoration: none;
}

.hot-news-title a:hover {
    color: #5a7388;
}

.hot-news-date {
    font-size: 11px;
    color: #999;
}

.story-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.story-item {
    display: flex;
    gap: 12px;
    padding: 12px;
    background: #f9f9f9;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s;
}

.story-item:hover {
    background: rgba(90,115,136,0.1);
}

.story-thumb {
    width: 80px;
    height: 60px;
    border-radius: 6px;
    overflow: hidden;
    flex-shrink: 0;
    display: none;
}

.story-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.story-content {
    flex: 1;
}

.story-title {
    font-size: 13px;
    color: #333;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 5px;
}

.story-title a {
    color: #333;
    text-decoration: none;
}

.story-title a:hover {
    color: #5a7388;
}

.story-desc {
    font-size: 11px;
    color: #999;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag-item {
    padding: 5px 12px;
    background: #f5f5f5;
    color: #666;
    font-size: 12px;
    border-radius: 15px;
    text-decoration: none;
    transition: all 0.3s;
}

.tag-item:hover {
    background: linear-gradient(135deg, #5a7388, #5a7388);
    color: #fff;
}

.new-product-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.new-product-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 12px;
    background: #f9f9f9;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid #5a7388;
}

.new-product-item:hover {
    background: rgba(90,115,136,0.1);
}

.new-product-title {
    font-size: 13px;
    color: #333;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.new-product-title a {
    color: #333;
    text-decoration: none;
}

.new-product-title a:hover {
    color: #5a7388;
}

.new-product-date {
    font-size: 11px;
    color: #999;
}

.brand-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.brand-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: #f9f9f9;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.3s;
}

.brand-item:hover {
    background: rgba(90,115,136,0.1);
    transform: translateX(3px);
}

.brand-logo {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    object-fit: cover;
    background: #fff;
}

.brand-name {
    flex: 1;
}

.brand-name strong {
    display: block;
    color: #333;
    font-size: 13px;
    margin-bottom: 2px;
}

.brand-name span {
    color: #999;
    font-size: 11px;
}

.brand-arrow {
    color: #ccc;
    font-size: 12px;
}

    
 .footer {
               max-width: 1400px;
              margin: 0 auto;
            margin-top: 3rem;
            padding: 2rem 0 3rem;
            border-top: 1px solid #eef2f8;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 2rem;
        }
        .footer-col p {
            color: #8aa2b8;
            font-size: 0.8rem;
            margin-top: 0.5rem;
        }
        .footer-links {
            display: flex;
            gap: 2rem;
        }
        .footer-links a {
            text-decoration: none;
            color: #5a6e7c;
            font-size: 0.8rem;
        }

@media (max-width: 992px) {
    .article-main {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        order: -1;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .sidebar-card {
        margin-bottom: 0;
    }

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

    .article-featured-image {
        height: 300px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .article-title {
        font-size: 1.4rem;
    }

    .article-meta {
        flex-wrap: wrap;
        gap: 12px;
    }

    .article-featured-image {
        height: 220px;
    }

    .article-nav {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        grid-template-columns: 1fr;
    }

    .related-articles-grid {
        grid-template-columns: 1fr;
    }

    .footer {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 1.2rem;
        padding: 1.5rem 0;
    }
}

@media (max-width: 550px) {
    .navbar {
        display: none !important;
    }

    .mobile-menu-btn {
        display: flex !important;
        flex-direction: column;
        gap: 5px;
        padding: 8px;
        cursor: pointer;
        background: rgba(255,255,255,0.9);
        border-radius: 8px;
        border: 1px solid #eef2f8;
    }

    .mobile-menu-btn span {
        display: block;
        width: 22px;
        height: 2px;
        background: #5a6e7c;
        border-radius: 2px;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 10px 14px;
        justify-content: center;
    }
}