/* --- Global Base Styles --- */
        :root {
            --primary-color: #005A9C;
            --primary-color-dark: #003D6B;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            margin: 0;
            padding: 0;
            line-height: 1.7;
            color: #333;
            background-color: #f8f9fa;
        }
        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: var(--primary-color-dark);
        }
        h1, h2, h3, h4 {
            color: #1a2533;
            line-height: 1.3;
            margin-top: 0;
        }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; text-align: center; margin-bottom: 50px; padding-bottom: 15px; border-bottom: 2px solid #e0e0e0; }
        h3 { font-size: 1.5rem; margin-bottom: 1rem; }
        h4 { font-size: 1.2rem; margin: 0 0 10px 0; }
        p { margin: 0 0 1rem 0; font-size: 1.05rem; color: #555; }
        section {
            padding: 60px 0;
            border-bottom: 1px solid #e9ecef;
        }
        section:last-of-type {
            border-bottom: none;
        }
        
        /* --- Header & Nav --- */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #ddd;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }
        .logo {
            font-size: 1.3rem;
            font-weight: bold;
            white-space: nowrap;
            flex-shrink: 0;
        }
        
        /***********************************/
        /* --- CSS for Logo with Text --- */
        /***********************************/
        .logo a {
            display: flex;
            align-items: center;
            text-decoration: none;
            color: inherit;
        }
        .logo img {
            height: 40px; /* Adjust height as needed */
            margin-right: 10px; /* Space between logo and text */
        }
        
        /* Nav and Search */
        .nav-and-search { display: flex; align-items: center; justify-content: flex-end; }
        nav a { margin: 0 9px; font-weight: 500; }

        /* Search Box */
        .search-container { position: relative; margin-left: 20px; width: 220px; }
        .search-container form { display: flex; justify-content: flex-end; }
        .search-container input[type="search"] { width: 180px; padding: 8px 35px 8px 15px; border-radius: 20px; border: 1px solid #ccc; outline: none; font-size: 0.9rem; transition: all 0.4s ease; }
        .search-container input[type="search"]:focus { width: 220px; border-color: var(--primary-color); box-shadow: 0 0 8px rgba(0, 90, 156, 0.2); }
        .search-container button { position: absolute; right: 0; top: 0; height: 100%; width: 40px; background: transparent; border: none; cursor: pointer; display: flex; align-items: center; justify-content: center; }
        .search-container button svg { width: 16px; height: 16px; fill: #777; transition: fill 0.3s ease; }
        .search-container button:hover svg { fill: var(--primary-color); }

        /* Mobile Hamburger Menu */
        .nav-toggle-checkbox { display: none; }
        .nav-toggle-label { display: none; width: 30px; height: 30px; cursor: pointer; z-index: 1001; }
        .nav-toggle-label span, .nav-toggle-label span::before, .nav-toggle-label span::after { display: block; background-color: #333; height: 3px; width: 100%; border-radius: 2px; position: relative; transition: all 0.3s; }
        .nav-toggle-label span::before, .nav-toggle-label span::after { content: ''; position: absolute; }
        .nav-toggle-label span::before { top: -8px; }
        .nav-toggle-label span::after { top: 8px; }

        /* Breadcrumb Nav */
        .breadcrumb-section { background-color: #e9ecef; padding: 12px 0; border-bottom: 1px solid #ddd; }
        .breadcrumb { list-style: none; display: flex; flex-wrap: wrap; margin: 0; padding: 0; font-size: 0.9rem; line-height: 1.4;}
        .breadcrumb-item + .breadcrumb-item::before { content: ">"; margin: 0 0.6em; color: #6c757d; }
        .breadcrumb-item a:hover { text-decoration: underline; }
        .breadcrumb-item.active { color: #333; font-weight: 500; }
        .breadcrumb-item {padding-top: 3px; padding-bottom: 3px;}
        
        /* Hero Section */
        .hero { background-image: linear-gradient(rgba(0, 90, 156, 0.75), rgba(0, 61, 107, 0.75)); color: white; text-align: center; padding: 80px 20px; border-bottom: none; }
        .hero h1 { color: white; }
        .hero p { max-width: 700px; margin: 20px auto 30px auto; color: rgba(255, 255, 255, 0.95); }
        .button { display: inline-block; padding: 12px 30px; border-radius: 5px; font-weight: bold; transition: all 0.3s; background-color: #007BFF; color: white; border: 2px solid #007BFF; }
        .button:hover { background-color: #0056b3; border-color: #0056b3; transform: translateY(-2px); }

        /* Featured Product (Image left, Text right) */
        .featured-product-grid { display: grid; grid-template-columns: 400px 1fr; align-items: center; gap: 50px; }
        .featured-product-text ul { list-style: none; padding: 0; }
        .featured-product-text ul li { padding-left: 25px; position: relative; margin-bottom: 10px; }
        .featured-product-text ul li::before { content: '✔'; color: #27ae60; position: absolute; left: 0; font-weight: bold; }
        .placeholder-image { display: flex; align-items: center; justify-content: center; background-color: #e9ecef; border: 2px dashed #ced4da; border-radius: 8px; color: #6c757d; font-size: 1.2rem; font-weight: 500; width: 100%; height: 400px; box-sizing: border-box; }

        /* Core Advantages (3-column cards) */
        .advantages-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
        .advantage-item { background-color: #fff; padding: 30px; border-radius: 8px; border: 1px solid #e9ecef; transition: transform 0.3s, box-shadow 0.3s; }
        .advantage-item:hover { transform: translateY(-5px); box-shadow: 0 5px 15px rgba(0,0,0,0.08); }

        /* Technical Resources */
        .resource-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 30px; }
        .resource-item { background-color: #fff; padding: 20px; border-radius: 8px; border: 1px solid #e9ecef; transition: all 0.3s; }
        .resource-item:hover { border-color: var(--primary-color); transform: scale(1.02); }
        .resource-item a { text-decoration: none; }
        .resource-item h4 { color: #333; transition: color 0.3s; }
        .resource-item a:hover h4 { color: var(--primary-color); }
        .resource-item p { margin: 0; font-size: 0.9rem; color: #555; }
        
        /* Tags Cloud */
        .tags-cloud { text-align: center; }
        .tags-cloud a { display: inline-block; background-color: #e9ecef; color: #555; padding: 8px 18px; margin: 5px; border-radius: 5px; font-size: 0.95rem; border: 1px solid #ddd; }
        .tags-cloud a:hover { background-color: var(--primary-color); color: #fff; border-color: var(--primary-color); }
        
        /* Footer */
        footer { background-color: #1a2533; color: #ccc; padding: 40px 0; }
        footer .container { text-align: center; }
        .footer-bottom { margin-top: 30px; padding-top: 20px; border-top: 1px solid #444; font-size: 0.9rem; }
        .footer-bottom p {margin: 4px 0; line-height: 1.5; }

        /* --- [新增版块样式] --- */
        .applications { background-color: #fff; }
/* Modify the grid */
/* product.css 文件中可能存在的旧代码 */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* 这行代码导致标题被压缩 */
    gap: 20px;
}

/* Ensure the h2 takes the full width */
.applications h2 {
    text-align: center; /* Optional: to center the heading */
    width: 100%;
}
        .application-item {
            text-align: center;
            padding: 20px;
        }
        .application-item .icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
            display: inline-block;
        }
        .application-item h4 {
            font-size: 1.1rem;
            margin-bottom: 10px;
        }
        .application-item p {
            font-size: 0.95rem;
            line-height: 1.5;
            color: #666;
        }
        
        /* --- Responsive Design --- */
        @media (max-width: 992px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .logo { font-size: 1rem; }
            .nav-toggle-label { display: flex; align-items: center; }
            .nav-and-search { display: none; position: absolute; top: 80px; left: 0; width: 100%; background-color: #fff; box-shadow: 0 4px 10px rgba(0,0,0,0.1); flex-direction: column; align-items: stretch; padding-bottom: 20px; }
            .nav-toggle-checkbox:checked ~ .nav-and-search { display: flex; }
            .nav-toggle-checkbox:checked + .nav-toggle-label span { background-color: transparent; }
            .nav-toggle-checkbox:checked + .nav-toggle-label span::before { transform: rotate(45deg); top: 0; }
            .nav-toggle-checkbox:checked + .nav-toggle-label span::after { transform: rotate(-45deg); top: 0; }
            nav { display: flex; flex-direction: column; width: 100%; }
            nav a { padding: 15px 20px; margin: 0; text-align: center; border-bottom: 1px solid #f0f0f0; font-size: 1.05rem;}
            .search-container { margin: 20px auto 0 auto; width: 90%; }
            .search-container input[type="search"], .search-container input[type="search"]:focus { width: 100%; }
            .resource-list { grid-template-columns: 1fr; }
            .featured-product-grid { grid-template-columns: 1fr; gap: 30px; }
        }
        /* "Why Choose Us" Section Styles */
.why-choose-us {
    padding: 80px 0;
    background-color: #ffffff; /* Clean white background */
}

.why-choose-us h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #1a253c; /* Dark, professional blue */
    margin-bottom: 20px;
    font-weight: 800;
}

.why-choose-us .section-subtitle {
    text-align: center;
    max-width: 750px;
    margin: 0 auto 60px auto;
    font-size: 1.15rem;
    color: #5c6a7e;
    line-height: 1.6;
}

.choose-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.choose-us-item {
    text-align: center;
    padding: 35px;
    border: 1px solid #e8eef3;
    border-radius: 12px;
    background-color: #f9fcff;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.choose-us-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(26, 37, 60, 0.08);
}

.choose-us-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 25px auto;
    background-color: #eaf6ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.choose-us-icon svg {
    width: 30px;
    height: 30px;
    stroke: #007bff; /* Vibrant blue for icons */
}

.choose-us-item h3 {
    font-size: 1.4rem;
    color: #1a253c;
    margin-bottom: 15px;
}

.choose-us-item p {
    font-size: 1rem;
    color: #5c6a7e;
    line-height: 1.7;
}