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

        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            background-color: #f0f8ff;
            color: #333;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* 头部样式 - 玻璃拟态效果 */
        .header {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(10px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid rgba(135, 206, 235, 0.3);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }

        .logo {
            font-size: 24px;
            font-weight: bold;
            color: #1a6fc4;
            text-shadow: 0 1px 2px rgba(0,0,0,0.1);
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 30px;
        }

        .nav-menu a {
            text-decoration: none;
            color: #1a6fc4;
            font-size: 16px;
            font-weight: 500;
            transition: all 0.3s;
            padding: 5px 10px;
            border-radius: 20px;
        }

        .nav-menu a:hover {
            background: rgba(135, 206, 235, 0.2);
            color: #0a4a8a;
        }

        .login-btn {
            background: linear-gradient(135deg, #1a6fc4, #2a9df4);
            color: white;
            border: none;
            padding: 10px 25px;
            border-radius: 30px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            transition: all 0.3s;
            box-shadow: 0 4px 10px rgba(26, 111, 196, 0.3);
        }

        .login-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(26, 111, 196, 0.4);
        }

        /* 登录弹窗样式 - 玻璃拟态 */
        .modal {
            display: none;
            position: fixed;
            z-index: 2000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.5);
            backdrop-filter: blur(5px);
        }

        .modal-content {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            margin: 10% auto;
            padding: 30px;
            border-radius: 15px;
            width: 400px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            border: 1px solid rgba(135, 206, 235, 0.3);
        }

        .close {
            color: #1a6fc4;
            float: right;
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s;
        }

        .close:hover {
            color: #0a4a8a;
            transform: scale(1.1);
        }

        .login-form input {
            width: 100%;
            padding: 12px 15px;
            margin: 12px 0;
            border: 1px solid rgba(135, 206, 235, 0.5);
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            transition: all 0.3s;
        }

        .login-form input:focus {
            outline: none;
            border-color: #1a6fc4;
            box-shadow: 0 0 0 3px rgba(26, 111, 196, 0.2);
        }

        .login-form button {
            width: 100%;
            padding: 12px;
            background: linear-gradient(135deg, #1a6fc4, #2a9df4);
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            transition: all 0.3s;
            margin-top: 10px;
            box-shadow: 0 4px 10px rgba(26, 111, 196, 0.3);
        }

        .login-form button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(26, 111, 196, 0.4);
        }

        /* 主体布局 */
        .main-container {
            max-width: 1800px;
            margin: 90px auto 30px;
            display: flex;
            min-height: calc(100vh - 120px);
            gap: 20px;
            flex: 1;
        }

        /* 左侧分类 - 玻璃拟态 */
        .left-sidebar {
            width: 15%;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(135, 206, 235, 0.2);
        }

        .category-title {
            font-size: 20px;
            font-weight: bold;
            color: #1a6fc4;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(135, 206, 235, 0.3);
        }

        .category-list {
            list-style: none;
        }

        .category-list li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(135, 206, 235, 0.2);
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 500;
            color: #1a6fc4;
        }

        .category-list li:hover {
            color: #0a4a8a;
            padding-left: 8px;
        }

        /* 中间内容区 - 玻璃拟态 */
        .main-content {
            width: 70%;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(135, 206, 235, 0.2);
        }

        /* 轮播图 - 玻璃拟态 */
        .carousel {
            position: relative;
            height: 550px;
            overflow: hidden;
            border-radius: 15px 15px 0 0;
        }

        .carousel-item {
            position: absolute;
            width: 100%;
            height: 100%;
            opacity: 0;
            transition: opacity 1s;
        }

        .carousel-item.active {
            opacity: 1;
        }

        .carousel-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .carousel-indicators {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            gap: 12px;
        }

        .indicator {
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background-color: rgba(255,255,255,0.7);
            cursor: pointer;
            transition: all 0.3s;
            border: 1px solid rgba(255,255,255,0.3);
        }

        .indicator.active {
            background-color: #1a6fc4;
            transform: scale(1.2);
        }

        /* 产品介绍 - 玻璃拟态 */
        .product-section {
            padding: 40px;
        }

        .section-title {
            font-size: 32px;
            color: #1a6fc4;
            margin-bottom: 25px;
            text-align: center;
            position: relative;
            padding-bottom: 15px;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: linear-gradient(90deg, #1a6fc4, #2a9df4);
            border-radius: 3px;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
            margin-top: 40px;
        }

        .feature-card {
            text-align: center;
            padding: 25px 20px;
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(5px);
            border-radius: 15px;
            transition: all 0.3s;
            border: 1px solid rgba(135, 206, 235, 0.3);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }

        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            border-color: rgba(26, 111, 196, 0.5);
        }

        .feature-icon {
            font-size: 48px;
            color: #1a6fc4;
            margin-bottom: 20px;
            text-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
.product-card {
    width: 32%;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,.08);
    transition: transform .3s, box-shadow .3s;
    display: flex;
    flex-direction: column;
    padding: 10px;
    margin: 5px;
    
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 20px rgba(0,0,0,.12);
}
.product-img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform .4s ease;
}
.product-card:hover .product-img {
    transform: scale(1.08);
}
.product-card strong {
    display: block;
    margin: 12px 0 6px;
    font-size: 17px;
    font-weight: 600;
}
.product-card strong a {
    text-decoration: none;
    color: #1A6FC4;
    transition: color .3s;
}
.product-card strong a:hover {
    color: #0d4a8c;
}
.product-card p {
    color: #555;
    line-height: 1.6;
    font-size: 14px;
}
@media (max-width: 768px) {
    .product-card {
        width: 100%;   /* 占满一行 */
        margin: 5px 0; /* 只保留上下间距 */
    }
}
        /* 右侧新闻 - 玻璃拟态 */
        .right-sidebar {
            width: 15%;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border: 1px solid rgba(135, 206, 235, 0.2);
        }

        .news-title {
            font-size: 20px;
            font-weight: bold;
            color: #1a6fc4;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(135, 206, 235, 0.3);
        }

        .news-item {
            margin-bottom: 20px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(135, 206, 235, 0.2);
        }

        .news-date {
            font-size: 12px;
            color: #5a9fd4;
            margin-bottom: 8px;
            font-weight: 500;
        }

        .news-item h4 {
            font-size: 15px;
            color: #1a6fc4;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .news-item p {
            font-size: 13px;
            color: #5a9fd4;
            line-height: 1.5;
        }

        /* 底部样式 */
        .footer {
            background: linear-gradient(135deg, #1a6fc4, #2a9df4);
            color: white;
            padding: 40px 0 20px;
            margin-top: auto;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-section h3 {
            font-size: 18px;
            margin-bottom: 15px;
            color: #fff;
        }

        .footer-section ul {
            list-style: none;
        }

        .footer-section ul li {
            margin-bottom: 10px;
        }

        .footer-section a {
            color: rgba(255,255,255,0.9);
            text-decoration: none;
            font-size: 14px;
            transition: all 0.3s;
        }

        .footer-section a:hover {
            color: white;
            padding-left: 5px;
        }

        .footer-section p {
            color: rgba(255,255,255,0.9);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 10px;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.2);
            color: rgba(255,255,255,0.8);
            font-size: 14px;
        }

        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 15px;
        }

        .social-links a {
            display: inline-block;
            width: 35px;
            height: 35px;
            background: rgba(255,255,255,0.2);
            border-radius: 50%;
            text-align: center;
            line-height: 35px;
            color: white;
            font-size: 16px;
            transition: all 0.3s;
        }

        .social-links a:hover {
            background: rgba(255,255,255,0.3);
            transform: translateY(-2px);
        }

        /* 底部浮动登录按钮 - 玻璃拟态 */
        .floating-login {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: linear-gradient(135deg, #1a6fc4, #2a9df4);
            color: white;
            border: none;
            padding: 15px 25px;
            border-radius: 50px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            box-shadow: 0 5px 15px rgba(26, 111, 196, 0.4);
            transition: all 0.3s;
            z-index: 999;
            backdrop-filter: blur(5px);
            border: 1px solid rgba(255,255,255,0.3);
        }

        .floating-login:hover {
            transform: translateY(-5px) scale(1.05);
            box-shadow: 0 8px 20px rgba(26, 111, 196, 0.5);
        }

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: #1a6fc4;
            cursor: pointer;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            /* 头部导航移动端适配 */
            .nav-container {
                padding: 10px 15px;
            }

            .logo {
                font-size: 18px;
            }

            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.95);
                backdrop-filter: blur(10px);
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 5px 15px rgba(0,0,0,0.1);
                gap: 15px;
            }

            .nav-menu.active {
                display: flex;
            }

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

            .login-btn {
                padding: 8px 20px;
                font-size: 14px;
            }

            /* 主体布局移动端适配 */
            .main-container {
                max-width: 1500px;
                flex-direction: column;
                margin: 70px auto 20px;
                padding: 0 15px;
                gap: 15px;
            }

            /* 左侧分类移动端适配 */
            .left-sidebar {
                width: 100%;
                padding: 20px;
                order: 2;
            }

            .category-title {
                font-size: 18px;
            }

            .category-list {
                display: flex;
                flex-wrap: wrap;
                gap: 10px;
            }

            .category-list li {
                padding: 8px 15px;
                border: 1px solid rgba(135, 206, 235, 0.5);
                border-radius: 20px;
                font-size: 14px;
                flex: 0 0 auto;
            }

            /* 中间内容移动端适配 */
            .main-content {
                width: 100%;
                order: 1;
            }

            /* 轮播图移动端适配 */
            .carousel {
                height: 250px;
            }

            .carousel-indicators {
                bottom: 15px;
            }

            .indicator {
                width: 10px;
                height: 10px;
            }

            /* 产品介绍移动端适配 */
            .product-section {
                padding: 25px 20px;
            }

            .section-title {
                font-size: 24px;
            }

            .section-title::after {
                width: 60px;
                height: 2px;
            }

            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 15px;
                margin-top: 25px;
            }

            .feature-card {
                padding: 20px 15px;
            }

            .feature-icon {
                font-size: 36px;
                margin-bottom: 15px;
            }

            .feature-card h3 {
                font-size: 16px;
            }

            .feature-card p {
                font-size: 14px;
            }

            /* 右侧新闻移动端适配 */
            .right-sidebar {
                width: 100%;
                padding: 20px;
                order: 3;
            }

            .news-title {
                font-size: 18px;
            }

            .news-item h4 {
                font-size: 14px;
            }

            .news-item p {
                font-size: 12px;
            }

            /* 登录弹窗移动端适配 */
            .modal-content {
                width: 90%;
                max-width: 350px;
                margin: 20% auto;
                padding: 25px;
            }

            /* 底部浮动登录按钮移动端适配 */
            .floating-login {
                bottom: 20px;
                right: 20px;
                padding: 12px 20px;
                font-size: 14px;
            }

            /* 底部移动端适配 */
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .footer-section h3 {
                font-size: 16px;
            }

            .footer-section a, .footer-section p {
                font-size: 13px;
            }
        }

        /* 更小屏幕的适配 */
        @media (max-width: 480px) {
            .logo {
                font-size: 16px;
            }

            .carousel {
                height: 200px;
            }

            .feature-grid {
                grid-template-columns: 1fr;
            }

            .section-title {
                font-size: 20px;
            }

            .product-section {
                padding: 20px 15px;
            }

            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .social-links {
                justify-content: center;
            }
        }

        /* 平板设备适配 */
        @media (min-width: 769px) and (max-width: 1024px) {
            .main-container {
                max-width: 95%;
                margin: 80px auto 20px;
            }

            .left-sidebar,
            .right-sidebar {
                width: 20%;
            }

            .main-content {
                width: 60%;
            }

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

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