/* ===== 全局重置 & 基础 ===== */
        /* 移除默认边距，设置盒模型为 border-box */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        /* 页面主体背景黑色，白色文字，禁止横向滚动，平滑滚动 */
        body {
            background-color: #000000;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: #ffffff;
            overflow-x: hidden;
            scroll-behavior: smooth;
        }

        /* ===== 自定义滚动条 ===== */
        /* 整个滚动条宽度 */
        ::-webkit-scrollbar {
            width: 6px;
        }

        /* 滚动条轨道背景 */
        ::-webkit-scrollbar-track {
            background: #0a0a0a;
        }

        /* 滚动条滑块颜色和圆角 */
        ::-webkit-scrollbar-thumb {
            background: #2c2c3a;
            border-radius: 6px;
        }

        /* 滑块 hover 状态 */
        ::-webkit-scrollbar-thumb:hover {
            background: #4a4a6a;
        }

        /* --- 导航栏容器 --- */
        /* 固定定位，模糊毛玻璃效果，底部边框和阴影 */
        .navbar {
            background: rgba(6, 6, 14, 1);
            -webkit-backdrop-filter: blur(32px) saturate(1.5);
            backdrop-filter: blur(32px) saturate(1.5);
            padding: 0.9rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
            box-shadow: 0 4px 40px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.02);
            transition: all 0.4s ease;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
        }

        /* 滚动后导航栏样式变化：更透明，更重阴影 */
        .navbar.scrolled {
            background: rgba(4, 4, 12, 0.75);
            -webkit-backdrop-filter: blur(40px) saturate(1.6);
            backdrop-filter: blur(40px) saturate(1.6);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            box-shadow: 0 8px 60px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.03);
        }

        /* --- Logo --- */
        /* Logo 链接使用 flex 布局，调整间距和字重 */
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.5rem;
            letter-spacing: -0.02em;
            color: #ffffff !important;
            text-decoration: none;
            position: relative;
            padding: 0.2rem 0;
        }

        /* Logo 图片尺寸与阴影效果 */
        .navbar-brand img {
            height: 50px;
            width: auto;
            filter: drop-shadow(0 0 16px rgba(100, 160, 255, 0.12));
            transition: filter 0.4s ease;
        }

        /* Logo 图片 hover 时阴影加强 */
        .navbar-brand:hover img {
            filter: drop-shadow(0 0 30px rgba(100, 160, 255, 0.25));
        }

        /* 品牌文字渐变色 */
        .brand-text {
            font-weight: 600;
            font-size: 1.25rem;
            background: linear-gradient(135deg, #ffffff 20%, #8ab4ff 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.02em;
        }

        /* =====  导航链接 ===== */
        /* 导航项之间增加间距，垂直居中 */
        .navbar-nav {
            gap: 0.15rem;
            align-items: center;
        }

        .nav-item {
            position: relative;
        }

        /* 导航链接的样式：白色文字，圆角按钮感，过渡效果 */
        .navbar-nav .nav-link {
            font-weight: 700;
            font-size: 1.1rem;
            padding: 0.55rem 1.2rem;
            color: rgb(255, 255, 255) !important;
            border-radius: 40px;
            transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            position: relative;
            letter-spacing: 0.01em;
            display: flex;
            align-items: center;
            gap: 0.4rem;
            white-space: nowrap;
        }

        /* 链接中的图标透明度 */
        .navbar-nav .nav-link i {
            font-size: 0.9rem;
            opacity: 0.5;
            transition: opacity 0.3s ease;
        }

        /* 链接 hover 或激活状态：背景微亮，阴影 */
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: #ffffff !important;
            background: rgba(255, 255, 255, 0.05);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), 0 0 24px rgba(138, 180, 255, 0.04);
        }

        /* hover/active 时图标完全显示 */
        .navbar-nav .nav-link:hover i,
        .navbar-nav .nav-link.active i {
            opacity: 1;
        }

        /* 导航链接下划线动画效果（伪元素） */
        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            border-radius: 4px;
            background: linear-gradient(90deg, #6a8cff, #a78bfa, #6a8cff);
            background-size: 200% 100%;
            transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            transform-origin: center;
            opacity: 0.5;
        }

        /* hover/active 时下划线展开并播放动画 */
        .navbar-nav .nav-link:hover::after,
        .navbar-nav .nav-link.active::after {
            transform: translateX(-50%) scaleX(1);
            animation: shimmerLine 2s ease-in-out infinite;
        }

        /* 下划线光晕流动动画 */
        @keyframes shimmerLine {

            0%,
            100% {
                background-position: 0% 50%;
            }

            50% {
                background-position: 100% 50%;
            }
        }

        /* 下拉菜单的头部容器（用于对齐） */
        .dropdown-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 0;
        }

        .dropdown-header .nav-link {
            flex: 1;
            margin: 0;
        }

        /* ===== 桌面端下拉菜单 ===== */
        @media (min-width: 992px) {

            /* 导航项之间更大间距 */
            .navbar-nav {
                gap: 5rem;
            }

            /* ---- 普通下拉菜单 ---- */
            .dropdown .dropdown-menu:not(.dropdown-menu-mega) {
                position: absolute;
                top: calc(100% + 0.5rem);
                left: 50%;
                transform: translateX(-50%) translateY(8px) scale(0.97);
                min-width: 260px;
                padding: 0.8rem 0.6rem;
                background: rgba(255, 255, 255, 0.97);
                -webkit-backdrop-filter: blur(24px) saturate(1.3);
                backdrop-filter: blur(24px) saturate(1.3);
                border: 1px solid rgba(0, 0, 0, 0.06);
                border-radius: 18px;
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.8);
                /* 默认隐藏，通过 hover 显示 */
                display: block !important;
                opacity: 0;
                visibility: hidden;
                pointer-events: none;
                transform-origin: top center;
                transition: opacity 0.3s ease, transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), visibility 0.3s;
                transition-delay: 0.25s, 0.25s, 0.25s;
            }

            /* 在菜单上方增加透明区域，防止鼠标移出时菜单立即消失 */
            .dropdown .dropdown-menu:not(.dropdown-menu-mega)::before {
                content: '';
                position: absolute;
                top: -16px;
                left: 0;
                width: 100%;
                height: 16px;
                background: transparent;
                pointer-events: auto;
            }

            /* 鼠标悬停父级时显示菜单 */
            .dropdown:hover .dropdown-menu:not(.dropdown-menu-mega) {
                opacity: 1;
                visibility: visible;
                transform: translateX(-50%) translateY(0) scale(1);
                pointer-events: auto;
            }

            /* 下拉菜单项样式 */
            .dropdown-menu:not(.dropdown-menu-mega) .dropdown-item {
                color: rgba(0, 0, 0, 0.8);
                font-weight: 600;
                font-size: 1rem;
                padding: 0.6rem 1.4rem;
                border-radius: 10px;
                transition: all 0.2s ease;
                display: flex;
                align-items: center;
                gap: 0.6rem;
                background: transparent;
            }

            .dropdown-menu:not(.dropdown-menu-mega) .dropdown-item i {
                width: 1.4rem;
                text-align: center;
                font-size: 1.5rem;
                transition: color 0.2s;
            }

            /* 菜单项 hover 效果 */
            .dropdown-menu:not(.dropdown-menu-mega) .dropdown-item:hover {
                background: rgba(0, 0, 0, 0.04);
                color: #000000;
            }

            /* 分割线样式 */
            .dropdown-divider {
                border-top: 1px solid rgba(0, 0, 0, 0.06);
                margin: 0.3rem 1rem;
            }

            /* 针对较小桌面屏幕 (992px ~ 1200px) 优化导航栏 */
            @media (min-width: 992px) and (max-width: 1200px) {

                /* 减小导航项之间的水平间距 */
                .navbar-nav {
                    gap: clamp(0.5rem, 1.5vw, 2.5rem);
                }

                /* 缩小导航链接的字体和内边距 */
                .navbar-nav .nav-link {
                    font-size: 0.95rem;
                    padding: 0.45rem 0.9rem;
                }

                /* 稍微缩小 Logo 高度，腾出横向空间 */
                .navbar-brand img {
                    height: 42px;
                }

                /* 调整右侧“科研铺子”按钮 */
                .btn-outline-light-custom {
                    padding: 0.4rem 1.1rem;
                    font-size: 0.9rem;
                }

                /* （可选）产品中心 Mega Menu 偏移量微调，避免菜单超出屏幕 */
                .dropdown-menu-mega {
                    transform: translateX(-50%) translateY(10px) scale(0.98) !important;
                }

                .dropdown:hover .dropdown-menu-mega {
                    transform: translateX(-50%) translateY(0) scale(1) !important;
                }
            }

            /* ===== 产品中心 Mega Menu (全屏宽幅) ===== */
            .dropdown-menu-mega {
                position: absolute;
                top: calc(100% + 0.5rem);
                left: 50%;
                transform: translateX(-50%) translateY(10px) scale(0.98);
                width: 100vw;
                max-width: 1280px;
                padding: 2.8rem 3rem;
                background: rgba(255, 255, 255, 0.97);
                -webkit-backdrop-filter: blur(32px) saturate(1.5);
                backdrop-filter: blur(32px) saturate(1.5);
                border: 1px solid rgba(0, 0, 0, 0.06);
                border-radius: 30px;
                box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.8);
                /* 使用三列网格布局 */
                display: grid !important;
                grid-template-columns: 1fr 1fr 1fr;
                gap: 2.5rem;
                /* 默认隐藏，hover 显示 */
                opacity: 0;
                visibility: hidden;
                pointer-events: none;
                transition: opacity 0.4s ease, transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), visibility 0.4s;
                transform-origin: top center;
                transition-delay: 0.25s, 0.25s, 0.25s;
            }

            /* 鼠标悬停时 Mega Menu 出现 */
            .dropdown:hover .dropdown-menu-mega {
                opacity: 1;
                visibility: visible;
                transform: translateX(-50%) translateY(0) scale(1);
                pointer-events: auto;
                transition-delay: 0s, 0s, 0s;
            }

            /* 菜单上方透明区域，防止鼠标离开触发 */
            .dropdown-menu-mega::before {
                content: '';
                position: absolute;
                top: -20px;
                left: 0;
                width: 100%;
                height: 20px;
                background: transparent;
                pointer-events: auto;
            }

            /* 默认 Mega Menu 居中显示 */
            .dropdown-menu-mega {
                left: 50% !important;
                transform: translateX(-50%) translateY(10px) scale(0.98) !important;
            }

            .dropdown:hover .dropdown-menu-mega {
                transform: translateX(-50%) translateY(0) scale(1) !important;
            }

            /* 在 992px~1200px 窗口范围内向右偏移 160px，避免菜单溢出或覆盖 */
            @media (min-width: 992px) and (max-width: 1200px) {
                .dropdown-menu-mega {
                    transform: translateX(calc(-50% + 115px)) translateY(10px) scale(0.98) !important;
                }

                .dropdown:hover .dropdown-menu-mega {
                    transform: translateX(calc(-50% + 115px)) translateY(0) scale(1) !important;
                }
            }

            /* 在 1200px~1600px 窗口范围内向右偏移 160px，避免菜单溢出或覆盖 */
            @media (min-width: 1200px) and (max-width: 1600px) {
                .dropdown-menu-mega {
                    transform: translateX(calc(-50% + 160px)) translateY(10px) scale(0.98) !important;
                }

                .dropdown:hover .dropdown-menu-mega {
                    transform: translateX(calc(-50% + 160px)) translateY(0) scale(1) !important;
                }
            }

            /* --- Mega Menu 列样式 --- */
            .mega-col {
                position: relative;
                overflow: hidden;
                display: flex;
                flex-direction: column;
                gap: 0.5rem;
                border-radius: 18px;
                padding: 0.8rem 0.6rem 0.8rem 0.6rem;
                transition: background 0.3s ease;
            }

            /* 背景图标 — 大号半透明、位于右下角 */
            .mega-bg-icon {
                position: absolute;
                right: -10px;
                bottom: -10px;
                font-size: 160px;
                opacity: 0.1;
                color: #4a6aff;
                pointer-events: none;
                z-index: 0;
                line-height: 1;
                transform: rotate(-4deg);
                filter: drop-shadow(0 0 40px rgba(74, 106, 255, 0.08));
                transition: opacity 0.4s ease, transform 0.4s ease;
            }

            /* 悬停列时背景图标变明显并轻微旋转 */
            .mega-col:hover .mega-bg-icon {
                opacity: 0.5;
                transform: rotate(-10deg) scale(1.02);
            }

            /* 列内标题和链接置于背景图标之上 */
            .mega-col-title,
            .mega-col a {
                position: relative;
                z-index: 1;
            }

            /* 列标题样式：底部边框，颜色深灰 */
            .mega-col-title {
                font-weight: 700;
                font-size: 1.05rem;
                color: #1a1a2e;
                letter-spacing: 0.03em;
                margin-bottom: 0.6rem;
                display: flex;
                align-items: center;
                gap: 0.5rem;
                border-bottom: 1px solid rgba(0, 0, 0, 0.06);
                padding-bottom: 0.6rem;
            }

            /* 列标题前的图标颜色 */
            .mega-col-title i {
                color: #4a6aff;
                font-size: 0.95rem;
                opacity: 0.8;
            }

            /* 列内链接样式 */
            .mega-col a {
                color: rgba(0, 0, 0, 0.7);
                text-decoration: none;
                font-weight: 600;
                font-size: 1rem;
                padding: 0.4rem 0.6rem;
                border-radius: 8px;
                transition: all 0.2s ease;
                display: flex;
                align-items: center;
                gap: 0.4rem;
            }

            /* 链接 hover 时文字变黑，背景浅灰 */
            .mega-col a:hover {
                color: #000000;
                background: rgba(0, 0, 0, 0.04);
                padding-left: 0.6rem;
            }

            /* 链接前的小箭头图标 */
            .mega-col a i {
                font-size: 0.7rem;
                opacity: 0.3;
                transition: opacity 0.2s;
                color: #4a6aff;
            }

            .mega-col a:hover i {
                opacity: 0.8;
            }

            /* 桌面端隐藏移动端专用的展开箭头按钮 */
            .dropdown-arrow-btn {
                display: none !important;
            }
        }

        /* ===== 移动端适配(≤992px) ===== */
        @media (max-width: 992px) {

            /* 折叠菜单滚动区域 */
            .navbar-collapse {
                max-height: calc(100vh - 80px);
                overflow-y: auto;
                padding: 0.5rem 0 1.5rem;
                background: transparent;
            }

            /* 移动端滚动条细条 */
            .navbar-collapse::-webkit-scrollbar {
                width: 3px;
            }

            .navbar-collapse::-webkit-scrollbar-track {
                background: transparent;
            }

            .navbar-collapse::-webkit-scrollbar-thumb {
                background: rgba(138, 180, 255, 0.2);
                border-radius: 6px;
            }

            /* 移动端导航链接样式调整 */
            .navbar-nav .nav-link {
                padding: 0.6rem 1rem;
                font-size: 1.05rem;
                border-radius: 12px;
                color: rgba(255, 255, 255, 0.85) !important;
            }

            .navbar-nav .nav-link:hover {
                background: rgba(255, 255, 255, 0.04);
                color: #ffffff !important;
            }

            /* 移除桌面端下划线动画 */
            .navbar-nav .nav-link::after {
                display: none !important;
            }

            /* --- 普通下拉菜单 (移动端) --- */
            .dropdown .dropdown-menu:not(.dropdown-menu-mega) {
                position: static;
                float: none;
                background: rgba(255, 255, 255, 0.97);
                -webkit-backdrop-filter: blur(8px);
                backdrop-filter: blur(8px);
                border: 1px solid rgba(0, 0, 0, 0.06);
                border-radius: 14px;
                margin: 0.2rem 0 0.4rem 0.8rem;
                padding: 0.4rem 0.2rem;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
                display: none;
                /* 默认隐藏，点击按钮后显示 */
            }

            .dropdown .dropdown-menu.show {
                display: block;
            }

            .dropdown-menu .dropdown-item {
                color: rgba(0, 0, 0, 0.8);
                font-weight: 600;
                font-size: 1rem;
                padding: 0.5rem 1.2rem;
                border-radius: 8px;
                transition: 0.15s;
                display: flex;
                align-items: center;
                gap: 0.6rem;
            }

            .dropdown-menu .dropdown-item:hover {
                background: rgba(0, 0, 0, 0.04);
                color: #000000;
            }

            .dropdown-menu .dropdown-item i {
                width: 1.4rem;
                text-align: center;
                font-size: 1.5rem;
                color: rgba(0, 0, 0, 0.25);
            }

            /* --- Mega Menu 移动端降级为普通列表 --- */
            .dropdown-menu-mega {
                display: none !important;
                flex-direction: column !important;
                min-width: auto !important;
                padding: 0.6rem 0.4rem !important;
                background: rgba(255, 255, 255, 0.97) !important;
                -webkit-backdrop-filter: blur(8px) !important;
                backdrop-filter: blur(8px) !important;
                border: 1px solid rgba(0, 0, 0, 0.06) !important;
                border-radius: 14px !important;
                margin: 0.2rem 0 0.4rem 0.8rem;
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15) !important;
                gap: 0.25rem;
            }

            .dropdown-menu-mega.show {
                display: block !important;
            }

            /* Mega Menu 内的列样式 */
            .dropdown-menu-mega .mega-col {
                margin-bottom: 0.5rem;
                position: relative;
                overflow: hidden;
                border-radius: 12px;
                padding: 0.4rem 0.4rem 0.4rem 0.4rem;
            }

            /* 移动端背景图标缩小 */
            .dropdown-menu-mega .mega-bg-icon {
                position: absolute;
                right: 0px;
                bottom: 0px;
                font-size: 72px;
                opacity: 0.045;
                color: #4a6aff;
                pointer-events: none;
                z-index: 0;
                line-height: 1;
                transform: rotate(-2deg);
            }

            .dropdown-menu-mega .mega-col-title,
            .dropdown-menu-mega .mega-col a {
                position: relative;
                z-index: 1;
            }

            .dropdown-menu-mega .mega-col-title {
                font-weight: 700;
                font-size: 0.95rem;
                color: #1a1a2e;
                padding: 0.2rem 0.4rem;
                border-bottom: 1px solid rgba(0, 0, 0, 0.06);
                display: flex;
                align-items: center;
                gap: 0.4rem;
            }

            .dropdown-menu-mega .mega-col-title i {
                color: #4a6aff;
            }

            .dropdown-menu-mega .mega-col a {
                color: rgba(0, 0, 0, 0.7);
                font-weight: 600;
                font-size: 0.92rem;
                padding: 0.25rem 0.8rem;
                display: flex;
                align-items: center;
                gap: 0.4rem;
                text-decoration: none;
                border-radius: 6px;
                transition: 0.15s;
            }

            .dropdown-menu-mega .mega-col a:hover {
                background: rgba(0, 0, 0, 0.04);
                color: #000000;
            }

            .dropdown-divider {
                border-top: 1px solid rgba(0, 0, 0, 0.06);
                margin: 0.2rem 1rem;
            }

            /* --- 移动端箭头按钮 --- */
            /* 用于点击展开/折叠下拉菜单的按钮 */
            .dropdown-arrow-btn {
                display: inline-flex !important;
                align-items: center;
                justify-content: center;
                background: rgba(255, 255, 255, 0.06);
                border: none;
                color: rgba(255, 255, 255, 0.5);
                font-size: 0.8rem;
                padding: 0.3rem 0.7rem;
                border-radius: 8px;
                transition: all 0.25s ease;
                cursor: pointer;
                flex-shrink: 0;
                margin-left: 0.2rem;
            }

            .dropdown-arrow-btn:hover,
            .dropdown-arrow-btn:focus {
                color: #ffffff;
                background: rgba(255, 255, 255, 0.10);
            }

            /* 旋转箭头表示展开状态 */
            .dropdown-arrow-btn.rotated i {
                transform: rotate(180deg);
            }

            .dropdown-arrow-btn i {
                transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
            }
        }

        /* ===== 右上角“科研铺子”按钮 ===== */
        /* 自定义轮廓按钮，圆角胶囊形，半透明背景 */
        .btn-outline-light-custom {
            border: 1px solid rgba(255, 255, 255, 0.08);
            background: rgba(255, 255, 255, 0.02);
            color: rgb(255, 255, 255);
            border-radius: 40px;
            padding: 0.5rem 1.6rem;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            -webkit-backdrop-filter: blur(4px);
            backdrop-filter: blur(4px);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            white-space: nowrap;
        }

        .btn-outline-light-custom i {
            font-size: 0.9rem;
            opacity: 0.6;
            transition: opacity 0.3s;
        }

        /* hover 时背景加深，边框增亮，微上移 */
        .btn-outline-light-custom:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.15);
            box-shadow: 0 0 30px rgba(138, 180, 255, 0.06);
            transform: translateY(-1px);
        }

        .btn-outline-light-custom:hover i {
            opacity: 1;
        }

        /* ===== 汉堡菜单按钮 ===== */
        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 12px;
            padding: 0.5rem 0.6rem;
            transition: border-color 0.3s;
            min-width: 44px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .navbar-toggler:hover {
            border-color: rgba(255, 255, 255, 0.15);
        }

        /* 汉堡图标颜色反相为白色 */
        .navbar-toggler-icon {
            filter: invert(1) brightness(0.7);
            width: 1.2em;
            height: 1.2em;
        }

        /* ===== Banner ===== */
        .banner {
            background-image: url('/img/product.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            /* ---- 固定宽高比 4:1 ---- */
            aspect-ratio: 4 / 1;
            margin-top: 80px;
            padding: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
            min-height: 180px;
            margin-bottom: clamp(3rem, 6vw, 5rem);
        }

        .banner::before {
            content: '';
            position: absolute;
            inset: -20px;
            /* 放大防止边缘露出原图边框 */
            background-image: url('/img/product.png');
            background-size: cover;
            background-position: center;
            filter: brightness(0.75);
            transform: scale(1.05);
            z-index: 0;
        }

        .banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.1);
            z-index: 1;
            pointer-events: none;
        }

        .banner .container {
            position: relative;
            z-index: 2;
        }

        .banner .banner-title {
            font-size: 58px;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 4px;
            color: #ffffff !important;
            text-shadow: 0 0 60px rgba(0, 0, 0, 0.6);
            line-height: 1.2;
        }

        .banner p {
            font-size: 20px;
            font-weight: 300;
            opacity: 0.92;
            max-width: 720px;
            margin: 0 auto;
            color: #ffffffb0;
            letter-spacing: 1px;
            text-shadow: 0 0 30px rgba(56, 189, 248, 0.08);
        }


        /* 响应式调整（可选） */
        @media (max-width: 768px) {
            .banner {
                padding: 120px 0 50px;
                margin-top: 60px;
                /* 移动端导航栏通常较矮 */
                min-height: 140px;
                /* 适当减小 */
                margin-bottom: 1.5rem;
            }

            .banner .banner-title {
                font-size: 34px;
                letter-spacing: 2px;
            }

            .banner p {
                font-size: 18px;
                padding: 0 1rem;
            }
        }

        /* 默认 (桌面) */
        .banner {
            aspect-ratio: 4 / 1;
            min-height: 180px;
        }

        /* 平板 */
        @media (max-width: 992px) {
            .banner {
                aspect-ratio: 3 / 1;
                min-height: 160px;
            }
        }

        /* 手机 */
        @media (max-width: 576px) {
            .banner {
                width: 100%;
                max-width: 100%;
                aspect-ratio: auto;
                box-sizing: border-box;
                min-height: 120px;
                margin-top: 56px;
                margin-bottom: 1rem;
            }

            .banner .banner-title {
                font-size: 26px;
                letter-spacing: 1px;
                margin-bottom: 8px;
            }

            .banner p {
                font-size: 14px;
                padding: 0 0.75rem;
                line-height: 1.5;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-nav {
            padding: 120px 0 0.5rem 0;
            background: transparent;
        }

        .breadcrumb {
            background: transparent;
            margin-bottom: 0;
            padding: 0.5rem 0;
            font-size: 0.9rem;
            color: #8a9bb5;
        }

        .breadcrumb a {
            color: #8a9bb5;
            text-decoration: none;
            transition: color 0.2s;
        }

        .breadcrumb a:hover {
            color: #38bdf8;
        }

        .breadcrumb .active {
            color: #ffffff;
            font-weight: 500;
        }

        /* 面包屑分隔符样式 */
        .breadcrumb-item+.breadcrumb-item::before {
            display: inline-flex;
            align-items: center;
            color: #6a8cff !important;
            font-weight: 700;
            font-size: 1.2rem;
            padding: 0 0.6rem;
            content: "›";
            /* 如果仍有偏移，可微调 line-height */
            line-height: 1;
        }

        /* ===== 产品详情容器 ===== */
        .detail-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1.5rem 1.5rem 3rem;
        }

        /* ---------- 浅色卡片样式 ---------- */
        .detail-hero {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            background: #f8f8f8;
            border-radius: 24px;
            padding: 2.5rem;
            margin-bottom: 2.5rem;
            border: 1px solid #e9edf4;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            transition: box-shadow 0.3s ease;
        }

        .detail-hero:hover {
            box-shadow: 0 12px 48px rgba(0, 0, 0, 0.10);
        }

        .detail-info {
            padding-top: 1.2rem;
        }

        /* ===== PC端：三个操作按钮弹性布局 ===== */
        .detail-info .action-row {
            display: flex;
            flex-wrap: wrap;
            /* 宽度不足时换行 */
            gap: 0.8rem 2rem;
            /* 行间距0.8rem，列间距2rem（可根据喜好调整） */
            align-items: center;
            margin-top: 0.5rem;
        }

        .detail-info .action-row .btn-download,
        .detail-info .action-row .btn-inquiry,
        .detail-info .action-row .btn-taobao {
            flex: 1 1 auto;
            /* 允许按钮按内容伸缩，但不强制占满 */
            min-width: -webkit-fill-available;
            min-width: fit-content;
            /* 避免按钮过窄 */
            white-space: nowrap;
            /* 文字不换行 */
            /* 可调整内边距使按钮更协调 */
            padding: 0.5rem 1.8rem;
        }

        /* 当一行放不下三个按钮时，让它们各占一整行（三行一列） */
        @media (max-width: 992px) {
            .detail-info .action-row {
                flex-direction: column;
                gap: 0.6rem;
            }

            .detail-info .action-row .btn-download,
            .detail-info .action-row .btn-inquiry,
            .detail-info .action-row .btn-taobao {
                width: 100%;
                justify-content: center;
                flex: 0 0 auto;
                /* 宽度由父容器决定 */
            }
        }


        @media (max-width: 768px) {
            .detail-hero {
                grid-template-columns: 1fr;
                gap: 1.5rem;
                padding: 1.5rem;
            }

            .detail-info .action-row {
                display: flex;
                flex-direction: column;
                gap: 0.6rem;
                width: 100%;
            }

            .detail-info .action-row .btn-download,
            .detail-info .action-row .btn-inquiry,
            .detail-info .action-row .btn-taobao {
                display: flex;
                width: 100%;
                justify-content: center;
                align-items: center;
                padding: 0.7rem 1rem;
                font-size: 0.95rem;
                text-align: center;
                box-sizing: border-box;
                /* 确保按钮宽度包含 padding */
                min-height: 44px;
                /* 符合移动端触控最佳点击区域 */
            }

            .navbar {
                padding: 0.5rem 0;
            }

            .navbar-brand img {
                height: 36px;
            }

            .btn-outline-light-custom {
                padding: 0.4rem 1.2rem;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 576px) {
            .navbar {
                padding: 0.4rem 0;
            }

            .navbar-brand img {
                height: 32px;
            }

            .btn-outline-light-custom {
                padding: 0.35rem 1rem;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 400px) {

            .detail-info .action-row .btn-download,
            .detail-info .action-row .btn-inquiry,
            .detail-info .action-row .btn-taobao {
                padding: 0.6rem 0.8rem;
                font-size: 0.88rem;
            }
        }

        .detail-section {
            background: #f8f8f8;
            border: 1px solid #e9edf4;
            border-radius: 20px;
            padding: 2rem 2.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.04);
            transition: box-shadow 0.3s ease;
            color: #1e2f3f;
        }

        .detail-section:hover {
            box-shadow: 0 12px 48px rgba(0, 0, 0, 0.08);
        }

        .detail-section > h2,
        .detail-section > h3 {
            color: #0b1a2e;
            margin-bottom: 1.2rem;
            font-size: 1.3rem;
        }

        .detail-section > h2 {
            font-weight: 700;
            margin-bottom: 1.6rem;
        }

        .detail-images .main-img {
            width: 100%;
            max-height: 380px;
            object-fit: contain;
            background: #f8f9fc;
            border-radius: 16px;
            border: 1px solid #e9edf4;
            padding: 0.5rem;
        }

        .detail-images .main-image-lightbox {
            display: block;
            max-width: 100%;
            cursor: zoom-in;
        }

        .thumb-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 1.2rem;
        }

        .thumb-list img {
            width: 56px;
            height: 56px;
            object-fit: cover;
            border-radius: 10px;
            border: 2px solid #e9edf4;
            cursor: pointer;
            transition: border-color 0.25s, transform 0.2s;
            background: #f8f9fc;
        }

        .thumb-list img.active,
        .thumb-list img:hover {
            border-color: #38bdf8;
            transform: scale(1.04);
        }

        .detail-info h1,
        .detail-info h2 {
            font-weight: 700;
            font-size: 2rem;
            letter-spacing: -0.5px;
            color: #0b1a2e;
            margin-bottom: 0.25rem;
        }

        .detail-info .model-label {
            color: #1a6b8a;
            font-weight: 500;
            font-size: 0.95rem;
            margin-bottom: 0.8rem;
            display: block;
        }

        .detail-info .summary-text {
            color: #2c3e50;
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 1.2rem;
        }

        .detail-info .action-row .btn-download {
            background: #f1f5f9;
            border: 1px solid #d0d8e0;
            color: #1a2a3a;
            border-radius: 40px;
            padding: 0.5rem 1.8rem;
            font-weight: 500;
            transition: all 0.25s;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }

        .detail-info .action-row .btn-download:hover {
            background: #e2eaf3;
            border-color: #b0c0d0;
            color: #0b1a2e;
        }

        .detail-info .action-row .btn-download.disabled {
            background: #6c757d;
            border-color: #6c757d;
            opacity: 0.6;
            cursor: not-allowed;
            pointer-events: none;
            color: #fff;
        }

        .detail-info .action-row .btn-inquiry {
            background: #38bdf8;
            border: 1px solid #38bdf8;
            color: #000;
            border-radius: 40px;
            padding: 0.5rem 2rem;
            font-weight: 600;
            transition: all 0.25s;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }

        .detail-info .action-row .btn-inquiry:hover {
            background: #5fc9ff;
            border-color: #5fc9ff;
            box-shadow: 0 0 30px rgba(56, 189, 248, 0.25);
        }

        /* 淘宝按钮 - 橙色 */
        .detail-info .action-row .btn-taobao {
            background: #f97316;
            border: 1px solid #f97316;
            color: #fff;
            border-radius: 40px;
            padding: 0.5rem 1.8rem;
            font-weight: 600;
            transition: all 0.25s;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
        }

        /* 淘宝按钮 - 悬停效果 */
        .detail-info .action-row .btn-taobao:hover:not(.disabled) {
            background: #ea580c;
            border-color: #ea580c;
            box-shadow: 0 0 30px rgba(249, 115, 22, 0.3);
            color: #fff;
            transform: translateY(-1px);
        }

        /* 淘宝按钮 - 禁用状态（无链接时灰色不可点） */
        .detail-info .action-row .btn-taobao.disabled {
            background: #6c757d;
            border-color: #6c757d;
            opacity: 0.6;
            cursor: not-allowed;
            pointer-events: none;
        }

        /* 详细描述图片只保留 GLightbox 图片区域，不显示其说明容器。 */
        .glightbox-container .gdesc-inner,
        .glightbox-container .gslide-description {
            display: none !important;
        }

        /* ===== 规格参数表格 — 仅边框，无颜色自定义 ===== */
        .spec-table {
            width: 100%;
            border-collapse: collapse;
            border-radius: 8px;
            overflow: hidden;
        }

        .spec-table th,
        .spec-table td {
            padding: 0.75rem 1rem;
            border: 1px solid #d8dce0;
            text-align: left;
            vertical-align: middle;
        }

        .spec-table th {
            font-weight: 600;
            width: 180px;
        }

        .spec-group-title {
            font-weight: 600;
            color: #0b1a2e;
            margin-top: 1.8rem;
            margin-bottom: 0.6rem;
            font-size: 1.05rem;
        }

        .spec-group-title:first-of-type {
            margin-top: 0;
        }

        /* ===== 上一页 / 下一页 ===== */
        .pagination-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
            padding-top: 0.5rem;
            margin-top: 0.5rem;
            border-top: 1px solid rgba(0, 0, 0, 0.06);
        }

        .pagination-nav .btn-nav {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1.2rem;
            border-radius: 40px;
            background: #f1f5f9;
            border: 1px solid #d0d8e0;
            color: #1a2a3a;
            font-weight: 500;
            transition: all 0.25s;
            text-decoration: none;
            font-size: 0.95rem;
            min-width: 120px;
            justify-content: center;
        }

        .pagination-nav .btn-nav:hover:not(.disabled) {
            background: #e2eaf3;
            border-color: #b0c0d0;
            color: #0b1a2e;
        }

        .pagination-nav .btn-nav.disabled {
            opacity: 0.4;
            cursor: not-allowed;
            pointer-events: none;
            background: #e9ecef;
            border-color: #ced4da;
            color: #6c757d;
        }

        .pagination-nav .btn-nav i {
            font-size: 0.9rem;
        }

        .pagination-nav .nav-label {
            font-size: 0.85rem;
            color: #6c7a8a;
            font-weight: 400;
        }

        .pagination-nav .nav-title {
            font-weight: 500;
            max-width: 160px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .pagination-nav .nav-spacer {
            flex: 1;
        }

        @media (max-width: 576px) {
            .pagination-nav {
                flex-direction: column;
                gap: 0.6rem;
            }

            .pagination-nav .btn-nav {
                width: 100%;
                min-width: unset;
            }

            .pagination-nav .nav-title {
                max-width: 120px;
            }
        }

        /* 页脚样式 */
        footer {
            background-color: #000000;
            text-align: center;
            padding: 2rem;
            color: #d1d5db;
            margin-top: 3rem;
        }

        .footer-dark {
            background-color: #000000;
            border-top: 1px solid #15273f;
            padding: 3rem 0 2rem;
        }

        footer p {
            margin-bottom: 0.25rem;
        }

        footer .small {
            color: #9ca3af;
        }

        footer a {
            color: #a0b4c8 !important;
            transition: color 0.2s;
        }

        footer a:hover {
            color: #38bdf8 !important;
            text-decoration: none;
        }

        /* 公众号二维码图片 */
        footer .qr-img {
            width: 120px;
            height: 120px;
            margin-bottom: 10px;
            flex-shrink: 0;
            align-self: center;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.06);
            padding: 4px;
            background: #0a0a0a;
        }