:root {
            --primary: #0f3c4a; /* 深海蓝 */
            --secondary: #d4af37; /* 香槟金 */
            --accent: #2bb3a3; /* 清新绿 */
            --text-dark: #1a1a1a;
            --text-light: #666;
            --bg-light: #f9fbfd;
            --white: #ffffff;
            --shadow: 0 10px 30px rgba(15, 60, 74, 0.08);
            --transition: all 0.3s ease;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        
        body {
            font-family: 'Montserrat', sans-serif;
            color: var(--text-dark);
            line-height: 1.6;
            background-color: var(--bg-light);
            overflow-x: hidden;
        }

        h1, h2, h3, h4 { font-family: 'Playfair Display', serif; font-weight: 700; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        ul { list-style: none; }

        /* --- Utility Classes --- */
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        .section-padding { padding: 100px 0; }
        .text-center { text-align: center; }
        
        .btn {
            display: inline-block; padding: 14px 32px; border-radius: 50px;
            font-weight: 600; letter-spacing: 0.5px; cursor: pointer;
            transition: var(--transition); border: none; font-size: 15px;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, #1a5c6e 100%);
            color: var(--white); box-shadow: 0 4px 15px rgba(15, 60, 74, 0.3);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(15, 60, 74, 0.4); }
        .btn-outline { background: transparent; border: 2px solid var(--white); color: var(--white); }
        .btn-outline:hover { background: var(--white); color: var(--primary); }

        .section-title {
            font-size: 36px; color: var(--primary); margin-bottom: 15px;
            position: relative; display: inline-block;
        }
        .section-title::after {
            content: ''; display: block; width: 60px; height: 3px;
            background: var(--secondary); margin: 15px auto 0;
        }
        .section-subtitle {
            color: var(--text-light); font-size: 18px; max-width: 600px; margin: 0 auto 60px;
        }

        /* --- Header --- */
        header {
            position: fixed; top: 0; width: 100%; z-index: 1000;
            background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.05); transition: var(--transition);
        }
        .nav-wrapper { display: flex; justify-content: space-between; align-items: center; height: 80px; }
        .logo { font-size: 24px; font-weight: 700; color: var(--primary); display: flex; align-items: center; gap: 10px; }
        .logo i { color: var(--secondary); }
        .nav-links { display: flex; gap: 30px; }
        .nav-links a { font-weight: 500; font-size: 15px; color: var(--text-dark); }
        .nav-links a:hover { color: var(--accent); }
        .header-cta { background: var(--primary); color: white; padding: 10px 25px; border-radius: 4px; font-size: 14px; font-weight: 600; }

        /* --- Hero Section with Slider --- */
        .hero {
            height: 100vh; min-height: 700px; position: relative;
            display: flex; align-items: center; color: white; overflow: hidden;
        }
        .hero-slider { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1; }
        .slide {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background-size: cover; background-position: center;
            opacity: 0; transition: opacity 1.5s ease-in-out;
        }
        .slide.active { opacity: 1; }
        .hero-overlay {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background: linear-gradient(rgba(15, 60, 74, 0.7), rgba(15, 60, 74, 0.5)); z-index: 2;
        }
        .hero-content { position: relative; z-index: 3; max-width: 800px; animation: fadeInUp 1s ease-out; }
        .hero-badge {
            display: inline-block; background: rgba(255,255,255,0.2); padding: 8px 16px;
            border-radius: 30px; font-size: 14px; margin-bottom: 20px; border: 1px solid rgba(255,255,255,0.3);
        }
        .hero h1 { font-size: 56px; line-height: 1.2; margin-bottom: 25px; }
        .hero p { font-size: 20px; opacity: 0.9; margin-bottom: 40px; max-width: 600px; }
        .hero-stats { display: flex; gap: 40px; margin-top: 60px; border-top: 1px solid rgba(255,255,255,0.2); padding-top: 30px; }
        .stat-item h3 { font-size: 32px; color: var(--secondary); margin-bottom: 5px; font-family: 'Montserrat', sans-serif; }
        .stat-item span { font-size: 14px; opacity: 0.8; }

        /* --- Data Counter Section (New) --- */
        .counter-section {
            background: var(--white);
            padding: 60px 0;
            border-bottom: 1px solid #eee;
        }
        .counter-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }
        .counter-item h3 {
            font-size: 42px;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 5px;
        }
        .counter-item p {
            color: var(--text-light);
            font-weight: 500;
            text-transform: uppercase;
            font-size: 14px;
            letter-spacing: 1px;
        }

        /* --- Features / Why Us --- */
        .features { background: white; }
        /* 电脑端：一行4个 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
}

/* 手机端：2行 × 2列 */
@media (max-width: 768px) {
    .feature-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .feature-card {
        padding: 20px 14px;
    }
    .feature-card h3 {
        font-size: 15px;
    }
    .feature-card p {
        font-size: 13px;
    }
}
        .feature-card {
            padding: 40px 30px; background: white; border-radius: 12px;
            box-shadow: var(--shadow); transition: var(--transition); border-bottom: 3px solid transparent;
        }
        .feature-card:hover { transform: translateY(-10px); border-bottom-color: var(--secondary); }
        .feature-icon {
            width: 70px; height: 70px; background: rgba(43, 179, 163, 0.1); color: var(--accent);
            border-radius: 50%; display: flex; align-items: center; justify-content: center;
            font-size: 28px; margin-bottom: 25px;
        }
        .feature-card h3 { font-size: 22px; margin-bottom: 15px; color: var(--primary); }
        .feature-card p { color: var(--text-light); font-size: 15px; }

        /* --- R&D Section (New) --- */
        .rnd-section { background: var(--bg-light); }
        .rnd-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .rnd-image {
            position: relative;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .rnd-image img { width: 100%; display: block; }
        .rnd-content h2 { font-size: 36px; color: var(--primary); margin-bottom: 20px; }
        .rnd-list { margin-top: 30px; }
        .rnd-list li {
            display: flex;
            align-items: flex-start;
            gap: 15px;
            margin-bottom: 20px;
        }
        .rnd-list i { color: var(--accent); margin-top: 5px; }
        .rnd-list h4 { font-size: 18px; margin-bottom: 5px; color: var(--text-dark); }
        .rnd-list p { font-size: 14px; color: var(--text-light); }


        /* --- Products Showcase --- */
        .products { background: var(--bg-light); }
        .product-tabs { display: flex; justify-content: center; gap: 15px; margin-bottom: 50px; flex-wrap: wrap; }
        .tab-btn {
            padding: 10px 25px; border: 1px solid #ddd; border-radius: 30px;
            background: white; cursor: pointer; font-weight: 500; transition: var(--transition);
        }
        .tab-btn.active, .tab-btn:hover { background: var(--primary); color: white; border-color: var(--primary); }
        .product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; }
        .product-card {
            background: white; border-radius: 12px; overflow: hidden;
            box-shadow: var(--shadow); transition: var(--transition); position: relative;
        }
        .product-card:hover { transform: scale(1.02); }
        .product-img { height: 250px; background: #f0f0f0; position: relative; overflow: hidden; }
        .product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
        .product-card:hover .product-img img { transform: scale(1.1); }
        .product-tag {
            position: absolute; top: 15px; left: 15px; background: var(--secondary);
            color: white; padding: 4px 12px; font-size: 12px; border-radius: 4px; font-weight: 600;
        }
        .product-info { padding: 25px; }
        .product-info h3 { font-size: 18px; margin-bottom: 8px; color: var(--primary); }
        .product-info p { font-size: 14px; color: var(--text-light); margin-bottom: 15px; }
        .custom-options { display: flex; gap: 10px; font-size: 12px; color: var(--accent); font-weight: 600; }

        /* --- Testimonials (New) --- */
        .testimonials { background: white; }
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .testimonial-card {
            background: var(--bg-light);
            padding: 30px;
            border-radius: 12px;
            position: relative;
        }
        .quote-icon {
            font-size: 40px;
            color: rgba(43, 179, 163, 0.2);
            position: absolute;
            top: 20px;
            right: 20px;
        }
        .testimonial-text {
            font-style: italic;
            color: var(--text-dark);
            margin-bottom: 20px;
            font-size: 16px;
        }
        .client-info { display: flex; align-items: center; gap: 15px; }
        .client-avatar {
            width: 50px; height: 50px; border-radius: 50%; background: #ddd;
            overflow: hidden;
        }
        .client-avatar img { width: 100%; height: 100%; object-fit: cover; }
        .client-details h4 { font-size: 16px; margin-bottom: 2px; color: var(--primary); }
        .client-details span { font-size: 13px; color: var(--text-light); }

        /* --- Factory & Trust --- */
        .factory-section { background: var(--primary); color: white; position: relative; overflow: hidden; }
        .factory-bg {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background: url('https://images.unsplash.com/photo-1581091226825-a6a2a5aee158?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover;
            opacity: 0.1;
        }
        .trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; position: relative; z-index: 2; }
        .trust-item {
            text-align: center; padding: 30px; border: 1px solid rgba(255,255,255,0.1);
            border-radius: 8px; background: rgba(255,255,255,0.05);
        }
        .trust-item i { font-size: 40px; color: var(--secondary); margin-bottom: 20px; }
        .trust-item h4 { font-size: 18px; margin-bottom: 10px; }
        .trust-item p { font-size: 14px; opacity: 0.8; }

        /* --- FAQ Section (New) --- */
        .faq-section { background: var(--bg-light); }
        .faq-container { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: white;
            margin-bottom: 15px;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0,0,0,0.03);
        }
        .faq-question {
            padding: 20px 25px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 25px 20px;
            color: var(--text-light);
            font-size: 15px;
            display: none;
        }
        .faq-item.active .faq-answer { display: block; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-question i { transition: transform 0.3s; }

        /* --- Process --- */
        .process-steps { display: flex; justify-content: space-between; position: relative; margin-top: 50px; }
        .process-steps::before {
            content: ''; position: absolute; top: 25px; left: 50px; right: 50px;
            height: 2px; background: #e0e0e0; z-index: 0;
        }
        .step { position: relative; z-index: 1; text-align: center; width: 16%; }
        .step-num {
            width: 50px; height: 50px; background: white; border: 2px solid var(--primary);
            color: var(--primary); border-radius: 50%; display: flex; align-items: center;
            justify-content: center; font-weight: 700; margin: 0 auto 20px; transition: var(--transition);
        }
        .step:hover .step-num { background: var(--primary); color: white; }
        .step h4 { font-size: 16px; margin-bottom: 8px; color: var(--primary); }
        .step p { font-size: 13px; color: var(--text-light); }

        /* --- Contact Form Section --- */
        .contact-section { background: white; position: relative; }
        .contact-container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .contact-info h2 { font-size: 42px; color: var(--primary); margin-bottom: 20px; }
        .contact-info p { font-size: 18px; color: var(--text-light); margin-bottom: 40px; }
        .info-list li { display: flex; align-items: center; gap: 15px; margin-bottom: 20px; font-size: 16px; }
        .info-list i {
            width: 40px; height: 40px; background: rgba(43, 179, 163, 0.1); color: var(--accent);
            border-radius: 50%; display: flex; align-items: center; justify-content: center;
        }
        .form-box {
            background: white; padding: 40px; border-radius: 15px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.1); border: 1px solid #eee;
        }
        .form-group { margin-bottom: 20px; }
        .form-group label { display: block; margin-bottom: 8px; font-weight: 600; font-size: 14px; color: var(--text-dark); }
        .form-control {
            width: 100%; padding: 12px 15px; border: 1px solid #ddd; border-radius: 6px;
            font-family: inherit; transition: var(--transition);
        }
        .form-control:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(43, 179, 163, 0.1); }

        /* --- Footer --- */
        footer { background: #0a2530; color: #8fa6ad; padding: 60px 0 20px; font-size: 14px; }
        .footer-grid {
            display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
            margin-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 40px;
        }
        .footer-col h4 { color: white; margin-bottom: 20px; font-size: 18px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a:hover { color: var(--secondary); }
        .copyright { text-align: center; }

        /* --- Animations --- */
        @keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
        .reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s ease-out; }
        .reveal.active { opacity: 1; transform: translateY(0); }

        /* --- Responsive --- */
        @media (max-width: 992px) {
            .hero h1 { font-size: 42px; }
            .trust-grid, .counter-grid { grid-template-columns: repeat(2, 1fr); }
            .contact-container, .rnd-container { grid-template-columns: 1fr; }
            .process-steps { flex-wrap: wrap; justify-content: center; gap: 20px; }
            .process-steps::before { display: none; }
            .step { width: 45%; margin-bottom: 30px; }
        }
        /* 手机端：2×2 紧凑布局 */
@media (max-width: 768px) {
    .footer-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px 12px;
    }
    /* 第1列（Logo+介绍）：跨两列独占一行 */
    .footer-col:first-child {
        grid-column: 1 / -1;
        text-align: center;
    }
    .footer-col:first-child p {
        font-size: 12px;
        line-height: 1.5;
    }
    .footer-col h4 {
        font-size: 13px;
        margin-bottom: 8px;
    }
    .footer-col ul li {
        font-size: 12px;
        margin-bottom: 4px;
    }
    .copyright p {
        font-size: 11px;
        text-align: center;
    }
}
		
		
		
		/* 双图展示区样式 */
.partner-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto 40px;
}
.partner-img-wrap {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(10,92,102,0.12);
    transition: transform 0.3s, box-shadow 0.3s;
}
.partner-img-wrap:hover {
    transform: translateY(-6px);
    box-shadow: 0 14px 36px rgba(10,92,102,0.18);
}
.partner-img-wrap img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    display: block;
}

/* 手机端适配 */
@media (max-width: 768px) {
    .partner-images {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .partner-img-wrap img {
        height: 200px;
    }
}
		
		/* ============================
   工厂实力展示 (Factory Tour)
   ============================ */
		
		

/* 1. 板块整体间距 */
.factory-tour {
    padding: 90px 0;
    background: #f7fafb; /* 浅灰蓝背景，与白色卡片形成层次 */
}

/* 2. 描述文字样式 */
.factory-tour .section-desc {
    text-align: center;
    color: #5a6b7c;
    font-size: 17px;
    line-height: 1.7;
    max-width: 850px;
    margin: 0 auto 50px; /* 居中且底部留出间距 */
}

/* 3. 图片网格容器 - 核心布局 */
.gallery-grid {
    display: grid;
    /* 桌面端：3列布局 */
    grid-template-columns: repeat(3, 1fr);
    gap: 20px; /* 图片间距 */
}

/* 4. 单张图片样式 */
.gallery-grid img {
    width: 100%;
    height: 260px;
    object-fit: cover; /* 保证图片不变形，自动裁剪填满 */
    border-radius: 12px; /* 圆角 */
    box-shadow: 0 6px 20px rgba(10, 92, 102, 0.08); /* 轻微阴影 */
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    cursor: pointer;
    background: #e0e8eb; /* 图片加载前的占位底色，防止白屏闪烁 */
}

/* 5. 鼠标悬停交互效果 */
.gallery-grid img:hover {
    transform: translateY(-8px) scale(1.02); /* 上浮并轻微放大 */
    box-shadow: 0 16px 36px rgba(10, 92, 102, 0.18); /* 阴影加深 */
}

/* 6. 平板端适配 (屏幕宽度小于 900px) */
@media (max-width: 900px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr); /* 变为2列 */
    }
    .gallery-grid img {
        height: 220px;
    }
    .factory-tour {
        padding: 60px 0;
    }
}

/* 7. 手机端适配 (屏幕宽度小于 500px) */
@media (max-width: 500px) {
    .gallery-grid {
        grid-template-columns: 1fr; /* 变为单列 */
    }
    .gallery-grid img {
        height: 200px;
    }
    .factory-tour .section-desc {
        font-size: 15px;
        margin-bottom: 30px;
    }
}
	/* 工厂视频样式 */
.factory-video {
    max-width: 1160px;
    margin: 0 auto 50px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(10, 92, 102, 0.15);
}
.factory-video video {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    background: #0a1a1e;
}

/* 手机端适配 */
@media (max-width: 768px) {
    .factory-video {
        margin: 0 16px 30px;
        border-radius: 12px;
    }
}
	/* --- 电脑端默认样式 --- */
.mobile-cta { display: none; } /* 默认隐藏菜单里的按钮 */
.desktop-cta { display: inline-block; } /* 默认显示顶部按钮 */

/* --- 手机端样式 (Max-width: 768px) --- */
/* ? 请复制这一段，替换原本的 @media (max-width: 768px) 部分 */

@media (max-width: 768px) {
    /* 1. 调整整体容器 */
    .nav-wrapper {
        display: flex !important;
        justify-content: space-between; /* 让Logo和右边分开 */
        align-items: center;
        padding: 10px 15px;
        position: relative;
    }

    /* 2. 调整 Logo (防止文字太长挤掉按钮) */
    .logo {
        font-size: 16px !important; /* 字体改小一点 */
        white-space: nowrap; /* 强制不换行 */
        display: flex;
        align-items: center;
        flex-shrink: 1; /* 允许Logo在极端情况下稍微收缩 */
    }
    
    /* 确保 Logo 里的 span 文字显示 */
    .logo span {
        display: inline !important; 
        margin-left: 4px;
    }

    /* 3. 关键修复：强制显示 "Get Quote" 按钮 */
    .header-cta {
        display: inline-block !important; /* 强制显示！ */
        visibility: visible !important;   /* 确保可见 */
        
        /* 为了塞进手机屏幕，我们需要把按钮变小一点 */
        padding: 6px 12px !important; 
        font-size: 12px !important;     /* 字体改小 */
        margin-left: 5px;               /* 和汉堡菜单留点缝隙 */
        white-space: nowrap;            /* 防止文字换行 */
        z-index: 1002;                  /* 保证按钮在最上层 */
    }

    /* 4. 汉堡菜单样式 (如果你之前没写，补上这个) */
    .hamburger {
        display: block; /* 手机端显示汉堡图标 */
        cursor: pointer;
        z-index: 1002;
        margin-left: 10px; /* 离按钮远一点 */
    }
    
    /* 汉堡菜单的三条横线 */
    .hamburger span {
        display: block;
        width: 25px;
        height: 3px;
        margin: 5px auto;
        background-color: #333; /* 根据你的主题色修改颜色 */
    }

    /* 5. 隐藏电脑端的长菜单列表 (默认隐藏) */
    .nav-links {
        position: absolute;
        top: 100%; /* 在导航栏下方 */
        left: 0;
        width: 100%;
        background-color: #fff; /* 背景色 */
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        
        /* 默认隐藏，点击汉堡后通过 JS 添加类名显示 */
        display: none; 
    }

    /* 当 JS 激活菜单时显示 */
    .nav-links.active {
        display: flex !important;
    }
    
    .nav-links a {
        margin: 10px 0;
        display: block;
    }
}