/* 品牌头部信息优化样式 */
        .brand-hero {
            background: linear-gradient(135deg, #fff 0%, #fff 100%);
            border-radius: 12px;
            padding: 40px;
            margin-bottom: 24px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.06);
            position: relative;
        }
        .brand-hero-badge {
            position: absolute;
            top: 20px;
            right: 20px;
        }
        .brand-hero-badge img {
            width: 80px;
            height: auto;
        }
        .brand-hero-content {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        .brand-header-main {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        .brand-pic {
            flex-shrink: 0;
            width: 280px;
            height: 180px;
            background: #fff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 24px rgba(0,0,0,0.1);
            overflow: hidden;
            padding: 15px 25px;
            display: none;
        }
        .brand-pic img {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
        }
        .brand-info {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 20px;
        }
        .brand-title-row {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        .brand-title-row h1 {
            margin: 0;
            font-size: 36px;
            font-weight: 700;
            color: #2c3e50;
            letter-spacing: 2px;
        }
        .brand-tags {
            display: flex;
            gap: 10px;
        }
        .brand-tag {
            background: linear-gradient(135deg, #2c6280 0%, #2c6280 100%);
            color: #fff;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
        }
        .brand-products {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .products-label {
            font-size: 14px;
            color: #666;
            font-weight: 500;
        }
        .product-tag {
            background: #fff;
            color: #3498db;
            padding: 5px 12px;
            border-radius: 6px;
            font-size: 13px;
            border: 1px solid #b8e0f0;
        }
        .brand-meta-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid #dee2e6;
        }
        .brand-meta-item {
            display: flex;
            flex-direction: column;
            gap: 6px;
            padding: 14px 18px;
            background: #fff;
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.04);
        }
        .brand-meta-item-wide {
            grid-column: span 1;
        }
        .brand-meta-label {
            font-size: 12px;
            color: #2c6280;
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .brand-meta-value {
            font-size: 14px;
            color: #2c6280;
            font-weight: 600;
        }
        .brand-meta-value a {
            color: #3498db;
            text-decoration: none;
            transition: color 0.3s;
        }
        .brand-meta-value a:hover {
            color: #2980b9;
            text-decoration: underline;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .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;
            }

            .navbar {
                display: none !important;
            }
            .brand-hero {
                padding: 24px;
            }
            .brand-hero-badge {
                position: static;
                margin-bottom: 16px;
            }
            .brand-hero-badge img {
                width: 60px;
            }
            .brand-header-main {
                flex-direction: column;
                align-items: center;
                text-align: center;
                gap: 24px;
            }
            .brand-pic {
                width: 240px;
                height: 150px;
            }
            .brand-title-row {
                justify-content: center;
                flex-direction: column;
                gap: 12px;
            }
            .brand-title-row h1 {
                font-size: 26px;
            }
            .brand-products {
                justify-content: center;
            }
            .brand-meta-grid {
                display: none;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr) !important;
            }
            .news-card {
                flex-direction: column;
            }
            .news-card-img {
                width: 100%;
                height: 120px;
            }
        }

        /* 侧边栏新闻资讯样式 */
        .sidebar-news {
            padding: 10px 0;
        }
        .sidebar-news-item {
            display: flex;
            align-items: flex-start;
            padding: 10px 15px;
            text-decoration: none;
            border-bottom: 1px solid #f0f0f0;
            transition: background-color 0.3s;
        }
        .sidebar-news-item:last-child {
            border-bottom: none;
        }
        .sidebar-news-item:hover {
            background-color: #f9f9f9;
        }
        .sidebar-news-pic {
            width: 60px;
            height: 60px;
            flex-shrink: 0;
            margin-right: 12px;
            border-radius: 4px;
            overflow: hidden;
            background-color: #eee;
            display: none;
        }
        .sidebar-news-pic img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .sidebar-news-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .sidebar-news-title {
            font-size: 14px;
            color: #1e4a6b;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }
        .sidebar-news-item:hover .sidebar-news-title {
            color: #e53935;
        }
        .sidebar-news-date {
            font-size: 12px;
            color: #1e4a6b;
        }
        .sidebar-more-link {
            display: block;
            text-align: center;
            padding: 12px 15px;
            color: #1e4a6b;
            font-size: 14px;
            text-decoration: none;
            border-top: 1px solid #eee;
            transition: color 0.3s;
        }
        .sidebar-more-link:hover {
            color: #e53935;
        }
        

 
        /* ========== 导航栏 ========== */
        .navbar {
            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;
        }

        /* 下拉菜单 */
        .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);
        }

        /* 移动端菜单按钮 */
        .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;
        }

         /* ========== 底部 ========== */
        .footer {
            max-width: 1352px;
            margin: 3rem auto 0;
            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;
        }

/* 手机端 550px */
@media (max-width: 550px) {
    /* 页脚：纵向居中 */
    .footer {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 1.2rem;
        padding: 1.5rem 1rem;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 12px 18px;
        justify-content: center;
    }

    .footer-links a {
        font-size: 0.75rem;
    }
}