/* ==========================================================================
           全局通用样式
           ========================================================================= */
        body {
            font-family: 'Helvetica Neue', Helvetica, Arial, "Microsoft YaHei", sans-serif;
            background-color: #ffffff;
            color: #333333;
            overflow-x: hidden;
        }
        
        .section-title {
            font-size: 2rem;
            font-weight: 300;
            letter-spacing: 2px;
            color: #111;
        }
        .section-subtitle {
            font-size: 0.95rem;
            color: #777;
            margin-top: 10px;
        }

        /* 统一的直角灰色按钮 */
        .btn-more-custom {
            background-color: #c5c5c5;
            color: #ffffff;
            border: none;
            padding: 10px 35px;
            font-size: 0.95rem;
            border-radius: 0;
            transition: background-color 0.3s;
        }
        .btn-more-custom:hover { background-color: #a8a8a8; color: #ffffff; }

        /* ==========================================================================
           1. 导航栏样式
           ========================================================================= */
        .navbar {
            transition: all 0.4s ease;
            padding: 20px 0;
            z-index: 1030;
        }
        .navbar-brand { font-weight: bold; font-size: 1.5rem; color: white !important; transition: color 0.3s; }
        .nav-link { color: white !important; font-weight: 500; transition: color 0.3s; }
        
        .navbar-scrolled,
        .navbar:hover {
            background-color: #ffffff !important;
            padding: 10px 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        .navbar-scrolled .nav-link, 
        .navbar-scrolled .navbar-brand,
        .navbar:hover .nav-link,
        .navbar:hover .navbar-brand { color: #000 !important; }

        @media (min-width: 992px) {
            .navbar .nav-item.dropdown:hover .dropdown-menu {
                display: block;
                margin-top: 0; 
                opacity: 1;
                visibility: visible;
                transform: translateY(0);
            }
            .navbar .dropdown-menu {
                display: block;
                opacity: 0;
                visibility: hidden;
                transform: translateY(10px);
                transition: all 0.3s ease;
                border-radius: 0;
                border: none;
                padding: 15px 0;
                box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            }
        }

        .dropdown-menu { background-color: #ffffff; }
        .dropdown-item { color: #333333 !important; font-size: 0.95rem; padding: 8px 25px; transition: all 0.3s; }
        .dropdown-item:hover { background-color: #f5f5f5; color: #000000 !important; }

        /* ==========================================================================
           2. 首屏 Banner 轮播区域
           ========================================================================= */
        .hero-carousel {
            height: 100vh;
            position: relative;
            background-color: #000;
        }
        .hero-carousel .carousel-inner,
        .hero-carousel .carousel-item {
            height: 100vh;
        }
        
        /* 轮播遮罩：确保上层白色文字清晰可见 */
        .hero-carousel .carousel-item::before {
            content: "";
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0, 0, 0, 0.3);
            z-index: 1;
        }

        /* 视频与图片的自适应铺满样式 */
        .hero-video {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .hero-img-1 {
            width: 100%;
            height: 100%;
            background: url('https://images.unsplash.com/photo-1509316975850-ff9c5deb0cd9?auto=format&fit=crop&w=1920&q=80') no-repeat center center fixed;
            background-size: cover;
        }
        .hero-img-2 {
            width: 100%;
            height: 100%;
            background: url('https://images.unsplash.com/photo-1473341304170-971dccb5ac1e?auto=format&fit=crop&w=1920&q=80') no-repeat center center fixed;
            background-size: cover;
        }

        /* 静态固定层：只放标题文字 */
        .hero-overlay-content {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            z-index: 2; 
            pointer-events: none; 
        }
        .hero-content-inner {
            text-align: center;
            pointer-events: auto; 
        }

        /* 动态播放按钮容器 */
        .video-play-btn-wrapper {
            position: absolute;
            bottom: 32%; 
            left: 50%;
            transform: translateX(-50%);
            z-index: 3;
        }
        .play-button { cursor: pointer; transition: transform 0.3s; display: inline-block; }
        .play-button:hover { transform: scale(1.1); }

        /* 首屏底部专属切屏小横条样式 */
        .banner-indicators {
            bottom: 40px;
            z-index: 3;
        }
        .banner-indicators [data-bs-target] {
            width: 35px;
            height: 3px;
            background-color: rgba(255, 255, 255, 0.4);
            border: none;
            transition: all 0.3s ease;
        }
        .banner-indicators .active {
            background-color: #ffffff;
            width: 50px;
        }

        /* ==========================================================================
           3. 推荐产品部分
           ========================================================================= */
        .product-section { padding: 80px 0; background-color: #ffffff; }
        .product-logo { font-size: 1.6rem; font-weight: bold; letter-spacing: 1px; margin-bottom: 25px; display: flex; align-items: center; color: #222; }
        .logo-icon { width: 24px; height: 24px; border: 2px solid #222; transform: rotate(45deg); margin-right: 12px; display: inline-block; }
        .product-desc { font-size: 0.95rem; line-height: 1.8; color: #555555; text-align: justify; margin-bottom: 35px; }
        .product-img-wrapper { width: 100%; height: 100%; min-height: 300px; background: url('https://images.unsplash.com/photo-1618005182384-a83a8bd57fbe?auto=format&fit=crop&w=800&q=80') no-repeat center center; background-size: cover; }

        /* ==========================================================================
           4. 新闻中心部分
           ========================================================================= */
        .news-section { padding: 80px 0; background-color: #fcfcfc; }
        .news-tabs { margin-top: 30px; margin-bottom: 50px; border-bottom: none; }
        .news-tabs .nav-link { color: #999999 !important; font-size: 1rem; border: none; padding: 5px 20px; position: relative; background: transparent; }
        .news-tabs .nav-link.active { color: #111111 !important; background: transparent !important; font-weight: bold; }
        .news-tabs .nav-link.active::after { content: ""; position: absolute; bottom: -5px; left: 20px; right: 20px; height: 2px; background-color: #111111; }
        
        .news-card { border: none; background: transparent; border-radius: 0; transition: transform 0.3s ease; }
        .news-card:hover { transform: translateY(-5px); }
        .news-card .card-img-top { border-radius: 0; object-fit: cover; height: 220px; }
        .news-meta { font-size: 0.85rem; color: #999999; margin-top: 15px; margin-bottom: 10px; }
        .news-title { font-size: 1.05rem; font-weight: bold; line-height: 1.5; color: #222222; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; height: 3rem; }
        
        .custom-carousel-indicators {
            position: static;
            display: flex;
            justify-content: center;
            gap: 12px;
            margin-top: 40px;
            margin-bottom: 40px;
            padding: 0;
            list-style: none;
        }
        .custom-carousel-indicators [data-bs-target] {
            box-sizing: content-box;
            flex: 0 1 auto;
            width: 6px;
            height: 6px;
            padding: 0;
            margin: 0;
            text-indent: -999px;
            cursor: pointer;
            background-color: #dddddd;
            border: none;
            border-radius: 50%;
            transition: background-color 0.3s ease;
        }
        .custom-carousel-indicators .active {
            background-color: #555555;
        }

        /* ==========================================================================
           5. 关于我们部分
           ========================================================================= */
        .about-section { padding: 90px 0; background-color: #ffffff; }
        .about-content { font-size: 0.95rem; line-height: 2; color: #444444; text-align: justify; }
        .about-content p { margin-bottom: 2rem; }

        /* ==========================================================================
           6. 动态相册图片墙样式
           ========================================================================= */
        .gallery-section { padding: 40px 0 80px 0; background-color: #ffffff; }
        .gallery-row { display: flex; width: 100%; height: 260px; margin-bottom: 15px; gap: 15px; }
        .gallery-item { overflow: hidden; position: relative; cursor: pointer; transition: flex 0.6s cubic-bezier(0.25, 1, 0.5, 1); }
        .gallery-item img { width: 100%; height: 100%; object-fit: cover; }
        .gallery-row:first-child .gallery-item { flex: 1; }
        .gallery-row:nth-child(2):not(:hover) .item-5 { flex: 0.8; }
        .gallery-row:nth-child(2):not(:hover) .item-6 { flex: 0.8; }
        .gallery-row:nth-child(2):not(:hover) .item-7 { flex: 1.4; }
        .gallery-row:hover .gallery-item { flex: 0.6 !important; }
        .gallery-row .gallery-item:hover { flex: 2 !important; }
        @media (max-width: 768px) {
            .gallery-row { flex-direction: column; height: auto !important; }
            .gallery-item { height: 200px; flex: none !important; }
            .gallery-row:hover .gallery-item { flex: none !important; }
        }

        /* ==========================================================================
           7. 页脚（Footer）样式
           ========================================================================= */
        .main-footer { background-color: #0b0b0a; color: #ffffff; padding-top: 60px; }
        .footer-top { padding-bottom: 60px; }
        .footer-title { font-size: 1.1rem; font-weight: 500; margin-bottom: 25px; letter-spacing: 1px; }
        .social-wechat { display: flex; align-items: center; font-size: 0.95rem; color: #ffffff; text-decoration: none; }
        .wechat-icon { margin-right: 10px; display: inline-flex; }
        .company-details p { font-size: 0.95rem; margin-bottom: 8px; color: #ffffff; }
        .footer-divider { border-top: 1px solid rgba(255, 255, 255, 0.1); }
        .footer-bottom { padding: 25px 0; font-size: 0.85rem; color: #666666; }
        .footer-bottom a { color: #666666; text-decoration: none; transition: color 0.3s; }
        .footer-bottom a:hover { color: #999999; }

        /* --- 微信二维码悬浮特调样式追加 --- */
        .social-wechat-wrapper {
            position: relative;
            display: inline-block;
        }
        .wechat-qrcode-box {
            position: absolute;
            bottom: 140%;
            left: 50%;
            transform: translateX(-50%) translateY(10px);
            width: 140px;
            padding: 10px;
            background-color: #ffffff;
            border-radius: 4px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
            text-align: center;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 10;
        }
        .wechat-qrcode-box img {
            width: 120px;
            height: 120px;
            display: block;
            margin: 0 auto;
        }
        .qrcode-arrow {
            position: absolute;
            bottom: -6px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 0;
            border-left: 6px solid transparent;
            border-right: 6px solid transparent;
            border-top: 6px solid #ffffff;
        }
        .social-wechat-wrapper:hover .wechat-qrcode-box {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
        }