/* ----- 全局重置 & 霜达专属配色 (深蓝#003d66 + 金色#c49a2b) 增加背景层次 ----- */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
        }
        body {
            padding-top: env(safe-area-inset-top);
            padding-left: env(safe-area-inset-left);
            padding-right: env(safe-area-inset-right);
            padding-bottom: env(safe-area-inset-bottom);
    /* 兼容iOS 11以下 */
            padding-top: constant(safe-area-inset-top);
            padding-left: constant(safe-area-inset-left);
            padding-right: constant(safe-area-inset-right);
            padding-bottom: constant(safe-area-inset-bottom);
            /*上面的八个要放到公共的css里，就是每个页面都要放置。*/
            color: #2c3e50;
            line-height: 1.6;
            background-color: #f0f5fa;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.2s;
        }
        a:focus, button:focus {
            outline: none;
            box-shadow: none;
        }
        ul { list-style: none; }
        .container {
            width: 100%;
            max-width: 1420px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* 核心：hero-content半透明白色背景 */
div.hero-content {
  background-color: rgba(255, 255, 255, 0.85);
  padding: 30px 15px;
  border-radius: 8px;
}

/* 标题-白色系适配的深灰（替代纯黑，更柔和） */
div.hero-content h1 { color: #333 !important; }
/* 标题强调色-你的橙色 */
div.hero-content h1 span { color: #c49a2b !important; }
/* 段落-浅深灰（易读不刺眼） */
div.hero-content p { color: #666 !important; }

/* 按钮-白色+橙色主色调 */
div.hero-content .hero-btns .btn { 
  background-color: #003d7a; color: #ffffff; border: 1px solid #1d9bcf !important;
  padding: 10px 20px; text-decoration: none; border-radius: 4px;
}
div.hero-content .hero-btns .btn.btn-gold { 
  background-color: #c49a2b; color: #fff !important; border: none !important;
}
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: #003d66;
            color: #fff;
            border-radius: 4px;
            font-size: 16px;
            font-weight: 500;
            border: none;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        .btn:hover { background-color: #002a47; }
        .btn-gold {
            background-color: #c49a2b;
        }
        .btn-gold:hover { background-color: #a8801f; }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title h2 {
            font-size: 36px;
            color: #003d66;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
            font-weight: 600;
        }
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: #c49a2b;
        }
        .section-title p {
            font-size: 18px;
            color: #4a6a7f;
            max-width: 800px;
            margin: 0 auto;
        }

        /* ----- 头部导航 ----- */
        header {
            background-color: #ffffff;
            box-shadow: 0 4px 20px rgba(0,61,102,0.08);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
        }
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 8px 0;
        }
        .logo a {
            display: flex;
            align-items: center;
        }
        .logo img {
            height: 60px;
            width: auto;
            max-width: 100%;
            display: block;
        }
        @media (max-width: 768px) {
            .logo img {
                height: 48px;
            }
        }

        .nav-toggle {
            display: none;
            font-size: 28px;
            cursor: pointer;
            color: #003d66;
            background: none;
            border: none;
            padding: 0 10px;
        }
        /* PC端导航 */
        .nav-menu {
            display: flex;
            align-items: center;
        }
        .nav-menu li {
            margin-left: 32px;
            position: relative;
        }
        .nav-menu li a {
            font-size: 16px;
            font-weight: 500;
            color: #1e3a4f;
            padding: 8px 0;
            display: inline-block;
            line-height: 1.2;
        }

        .nav-menu li a.active {
            color: #003d66;
            font-weight: 600;
        }
        .nav-menu li a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: #c49a2b;
        }
        .has-submenu > a .arrow {
            display: inline-block;
            margin-left: 6px;
            font-size: 12px;
            transition: transform 0.2s;
        }
        .has-submenu:hover > a .arrow {
            transform: rotate(180deg);
        }
        .nav-menu li:hover .submenu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .submenu {
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            position: absolute;
            top: 100%;
            left: 0;
            background-color: #fff;
            min-width: 200px;
            box-shadow: 0 10px 30px rgba(0,61,102,0.15);
            border-radius: 8px;
            padding: 12px 0;
            transition: all 0.25s;
            border: 1px solid rgba(0,61,102,0.08);
        }
        .submenu li a {
            display: block;
            font-size: 14px;
            padding: 8px 20px;
            color: #2c3e50;
            border-left: 3px solid transparent;
        }
        .submenu li a:hover {
            color: #003d66;
            background-color: #f0f5fa;
            border-left-color: #c49a2b;
        }

        /* 移动端导航样式（箭头保持在同一条水平线） */
        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                align-items: stretch;
                position: absolute;
                top: 64px;
                left: 0;
                width: 100%;
                background-color: #003d66;
                padding: 20px 0;
                max-height: calc(100vh - 70px);
                overflow-y: auto;
                box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-menu li {
                margin: 0;
                width: 100%;
                border-bottom: 1px solid #1f5780;
                position: relative;
            }
            .nav-menu li a {
                color: #fff;
                padding: 15px 40px 15px 20px;
                font-size: 16px;
                display: block;
                width: 100%;
                line-height: 1.2;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
            }
            .nav-menu li a.active {
                background-color: #c49a2b;
                color: #003d66;
            }
            .nav-menu li a.active::after {
                display: none;
            }
            .has-submenu > a .arrow {
                position: absolute;
                right: 15px;
                top: 50%;
                transform: translateY(-50%);
                font-size: 22px;
                font-weight: bold;
                color: #c49a2b;
                transition: transform 0.2s;
                pointer-events: none;
                text-shadow: 0 0 2px #00000040;
                line-height: 1;
            }
            .has-submenu.open > a .arrow {
                transform: translateY(-50%) rotate(180deg);
            }
            /* 确保激活状态下箭头颜色（仅对其他链接有效，父级展开时不会激活） */
            .nav-menu li a.active .arrow {
                color: #003d66;
            }
            .submenu {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                background-color: #1f4d73;
                border-radius: 0;
                padding: 0;
                display: none;
                width: 100%;
            }
            .submenu.show {
                display: block;
            }
            .submenu li a {
                color: #fff;
                padding: 12px 30px;
                border-left: none;
                background-color: #1f4d73;
                white-space: normal;
                overflow: visible;
                text-overflow: clip;
            }
            .submenu li a:hover {
                background-color: #c49a2b;
                color: #003d66;
            }
            .mobile-contact {
                background-color: #c49a2b;
                text-align: center;
                margin: 20px;
                border-radius: 40px;
                padding: 12px 20px;
                font-weight: bold;
            }
            .mobile-contact a {
                color: #003d66;
                display: block;
                padding: 0;
                white-space: normal;
                overflow: visible;
            }

            /* 移动端案例导航按钮显示与调整 */
            .case-nav-btn {
                display: flex;
                width: 40px;
                height: 40px;
                font-size: 20px;
            }
            .case-nav-btn.prev { left: 5px; }
            .case-nav-btn.next { right: 5px; }
        }
        @media (min-width: 769px) {
            .mobile-contact {
                display: none;
            }
        }

        /* 各板块背景色增强层次 */
        .process-flow {
            padding: 80px 0 60px;
            background-color: #ffffff;
        }
        .about {
            padding: 100px 0;
            background-color: #ffffff;
        }
        .services {
            padding: 100px 0;
            background-color: #f0f5fa;
        }
        .advantages {
            padding: 100px 0;
            background-color: #ffffff;
        }
        .cases {
            padding: 100px 0;
            background-color: #f0f5fa;
        }
        .equipment {
            padding: 100px 0;
            background-color: #ffffff;
        }
        .friend-links {
            background-color: #e5ecf3;
            border-top: 1px solid #d0ddee;
        }

        /* 英雄区 */
        .hero {
    height: 100vh;
    /* 去掉原来的 background 相关代码 */
    display: flex;
    align-items: center;
    color: #fff;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}
.hero .hero-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    z-index: -1;
}
        .hero-content {
            max-width: 800px;
        }
        .hero h1 {
            font-size: 48px;
            line-height: 1.5;
            margin-bottom: 20px;
        }
        .hero h1 span {
            color: #c49a2b;
            border-bottom: 2px solid #c49a2b;
        }
        .hero p {
            font-size: 20px;
            margin-bottom: 40px;
            color: rgba(255,255,255,0.85);
        }
        .hero-btns { display: flex; gap: 20px; }

        /* ===== 五大流程服务卡片（正方形图片，无框） ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 25px;
            margin-top: 20px;
        }
        .process-card {
            background: #f8fafd;
            border-radius: 20px;
            padding: 25px 15px 20px;
            text-align: center;
            box-shadow: 0 8px 20px rgba(0,61,102,0.05);
            transition: 0.3s;
            border: 1px solid #e7edf4;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .process-card:hover {
            transform: translateY(-5px);
            border-color: #c49a2b;
            box-shadow: 0 15px 30px rgba(0,61,102,0.1);
        }
        /* 图片容器：正方形，无背景无圆角 */
        .process-icon {
            width: auto;
            height: 200px;
            margin-bottom: 15px;
            overflow: hidden;
            background: none !important;        /* 移除原有蓝色背景 */
            border-radius: 0 !important;        /* 移除圆形 */
            display: block;                      /* 确保块状 */
        }
        .process-icon img {
            width: 100%;
            height: 100%;
            object-fit: cover;                   /* 保证图片填满正方形，按需裁剪 */
            display: block;
        }
        .process-card h3 {
            font-size: 20px;
            color: #003d66;
            margin-bottom: 10px;
            font-weight: 600;
        }
        .process-card p {
            font-size: 14px;
            color: #4a6a7f;
            line-height: 1.6;
        }
        @media (max-width: 992px) {
            .process-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 768px) {
            .process-grid {
                grid-template-columns: 1fr;
                gap: 15px;
            }
        }

        /* 关于我们（图片完全居中） */
        .about-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 50px;
        }
        .about-img {
            flex: 1;
            min-width: 400px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0,61,102,0.1);
            background-color: #eef4f9;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .about-img img {
            width: 100%;
            max-height: 400px;
            object-fit: contain;
            display: block;
        }
        .about-text {
            flex: 1;
            min-width: 400px;
        }
        .about-text h3 {
            font-size: 28px;
            color: #003d66;
            margin-bottom: 20px;
        }
        .about-text p {
            color: #3f5a6b;
            margin-bottom: 20px;
            line-height: 1.8;
        }
        .about-features {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        .about-feature {
            background-color: #f0f5fa;
            padding: 8px 20px;
            border-radius: 30px;
            color: #003d66;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* 冷库服务类型 - 两列卡片布局（每行两个，共两行，四个卡片） */
        .services-wrapper {
            display: flex;
            gap: 30px;
        }
        .services-sidebar {
            flex: 0 0 200px;
            background-color: #fff;
            border-radius: 16px;
            box-shadow: 0 8px 25px rgba(0,61,102,0.06);
            padding: 16px 0;
            height: fit-content;
            position: sticky;
            top: 100px;
        }
        .service-category {
            padding: 12px 20px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
            border-left: 3px solid transparent;
            color: #2c3e50;
            background-color: #fff;
            font-size: 16px;  /* 从15px调大到16px */
        }
        .service-category a {
            display: block;
            width: 100%;
            height: 100%;
        }
        .service-category.active {
            background-color: #f0f5fa;
            color: #003d66;
            border-left-color: #c49a2b;
            font-weight: 600;
        }
        .service-category:hover:not(.active) {
            background-color: #f8fafd;
            color: #003d66;
            border-left-color: #c49a2b;
        }
        .services-content {
            flex: 1;
            min-width: 300px;
        }
        .service-content-panel {
            display: none;
            animation: fade 0.3s;
        }
        .service-content-panel.active {
            display: block;
        }
        @keyframes fade { from { opacity: 0.2; } to { opacity: 1; } }

        /* ===== 全新单卡片样式：正方形背景图 + 悬浮信息 ===== */
        .service-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 25px;
            margin-bottom: 30px;
        }
        .single-card {
            position: relative;
            aspect-ratio: 1 / 1;               /* 强制正方形 */
            background: transparent;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 15px 30px rgba(0,61,102,0.08);
            transition: transform 0.3s, box-shadow 0.3s;
            border: none;                       /* 移除原有边框 */
            padding: 0;
            display: block;
        }
        .single-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 35px rgba(0,61,102,0.12);
        }
        /* 背景图片铺满正方形 */
        .single-card > img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;                   /* 保证填满，可能裁剪，用户可自行调整至cover/contain */
            display: block;
            pointer-events: none;                 /* 让点击穿透到链接 */
        }
        /* 悬浮信息条：中下位置 + 半透明背景 */
        .single-card .single-card-info {
            position: absolute;
            bottom: 20px;
            left: 20px;
            right: 20px;
            background: rgba(0, 0, 0, 0.7);      /* 深色半透明，保证文字在任何图片上都清晰 */
            color: #fff;
            padding: 12px 12px;
            border-radius: 16px;
            text-align: center;
            backdrop-filter: blur(3px);           /* 轻微模糊增加可读性 */
            border: none;
            box-shadow: none;
            pointer-events: auto;                 /* 允许点击内部链接 */
        }
        .single-card .single-card-info h3,
        .single-card .single-card-info p {
            color: #fff;
            margin-bottom: 6px;
        }
        .single-card .single-card-info h3 {
            font-size: 18px;
            font-weight: 600;
        }
        .single-card .single-card-info p {
            font-size: 13px;
            opacity: 0.95;
            line-height: 1.4;
        }
        .single-card .btn-sm {
            background-color: #c49a2b;
            color: #fff;
            padding: 6px 18px;
            border-radius: 30px;
            display: inline-block;
            font-size: 13px;
            border: none;
            margin-top: 5px;
            transition: background-color 0.2s;
        }
        .single-card .btn-sm:hover {
            background-color: #a8801f;
        }
        /* 移除原有可能导致干扰的样式 */
        .single-card .single-card-img {
            display: none;   /* 确保旧结构不影响，但我们已删除HTML中的此元素 */
        }

        /* 查看更多按钮 */
        .service-more {
            text-align: right;
            margin-top: 10px;
        }
        .service-more a {
            display: inline-block;
            padding: 10px 25px;
            background-color: #003d66;
            color: #fff;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 500;
            transition: background-color 0.3s;
        }
        .service-more a:hover {
            background-color: #c49a2b;
        }
        .service-more a::after {
            content: " →";
            font-size: 18px;
            margin-left: 5px;
        }

        /* 核心优势 */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .advantage-item {
            text-align: center;
            padding: 40px 20px 35px;
            border-radius: 20px;
            background-color: #f8fafd;
            border: 1px solid #e7edf4;
            transition: 0.3s;
        }
        .advantage-item:hover {
            border-color: #c49a2b;
            transform: translateY(-5px);
            box-shadow: 0 12px 28px rgba(0,61,102,0.1);
        }
        .advantage-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 22px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .advantage-icon svg {
            width: 70px;
            height: 70px;
            fill: #003d66;
            transition: fill 0.2s;
        }
        .advantage-item:hover .advantage-icon svg {
            fill: #c49a2b;
        }
        .advantage-item h3 {
            font-size: 20px;
            color: #003d66;
            margin-bottom: 12px;
            font-weight: 600;
        }
        .advantage-item p {
            color: #4a6a7f;
            font-size: 14px;
            line-height: 1.7;
            max-width: 260px;
            margin: 0 auto;
        }

        /* 案例展示 (轮播) */
        .cases-wrapper {
            position: relative;
            overflow: hidden;
        }
        .case-nav-btn {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 54px;
            height: 54px;
            border-radius: 50%;
            background-color: #003d66;
            color: #fff;
            border: 2px solid #c49a2b;
            font-size: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 10;
            transition: 0.25s;
        }
        .case-nav-btn:hover {
            background-color: #c49a2b;
            border-color: #003d66;
            color: #003d66;
        }
        .case-nav-btn.prev { left: 0px; }
        .case-nav-btn.next { right: 0px; }
        .cases-slider {
            display: flex;
            gap: 25px;
            transition: transform 0.45s;
            padding: 10px 0;
        }
        .case-card {
            flex: 0 0 calc(33.333% - 17px);
            background-color: #fff;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 6px 18px rgba(0,61,102,0.06);
        }
        .case-card a { display: flex; flex-direction: column; height: 100%; }
        .case-card-img {
            height: 180px;
            background: #eef4f9;
            overflow: hidden;
        }
        .case-card-img img {
            width: 100%;
            height: 100%;
            object-fit: contain;    /* 修改为 contain，保证图片完整显示且不变形 */
            display: block;
            background-color: #eef4f9; /* 与容器背景一致，使留白区域统一 */
        }
        .case-card-content { padding: 20px; }
        .case-card h3 { font-size: 18px; color: #003d66; margin-bottom: 8px; }
        .case-card-info { color: #8a9fb0; font-size: 12px; display: flex; justify-content: space-between; }

        /* 制冷设备 */
        .equipment-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .equipment-card {
            background-color: #f8fafd;
            border-radius: 20px;
            padding: 30px 20px 25px;
            text-align: center;
            border: 1px solid #e7edf4;
            transition: 0.3s;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .equipment-card:hover {
            border-color: #c49a2b;
            transform: translateY(-5px);
            box-shadow: 0 12px 25px rgba(0,61,102,0.1);
        }
        .equipment-card-img {
            width: auto;
            height: auto;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            background-color: #fff;
            border-radius: 8px;
            box-shadow: 0 6px 15px rgba(0,61,102,0.08);
            overflow: hidden;
        }
        .equipment-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;    /* 设备图片改为cover */
            display: block;
        }
        .equipment-card h3 {
            font-size: 20px;
            color: #003d66;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .equipment-card p {
            font-size: 14px;
            color: #4a6a7f;
            line-height: 1.7;
            max-width: 240px;
            margin: 0 auto;
        }

        /* 友情链接 */
        .friend-links {
            padding: 20px 0 20px;
        }
        .friend-links h3 {
            font-size: 20px;
            color: #003d66;
            margin-bottom: 15px;
            text-align: left;
        }
        .links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 20px 30px;
            justify-content: flex-start;
        }
        .links-list a {
            color: #2c3e50;
            font-size: 14px;
            padding: 3px 0;
            border-bottom: 1px solid transparent;
        }
        .links-list a:hover {
            border-bottom-color: #c49a2b;
            color: #003d66;
        }

        /* 页脚 */
        footer {
            background-color: #001f2f;
            color: #adc4d9;
            padding: 50px 0 20px;
        }
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo .logo-text { color: #fff; font-size: 28px; margin-bottom: 15px; font-weight: 700; }
        .footer-logo .logo-text span { color: #c49a2b; font-weight: 400; }
        .footer-logo p { max-width: 300px; }
        .footer-contact h3, .footer-links h3 {
            color: #fff;
            font-size: 20px;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-contact h3::after, .footer-links h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 2px;
            background-color: #c49a2b;
        }
        .footer-contact-item a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #adc4d9;
            margin-bottom: 15px;
        }
        .footer-contact-item a:hover { color: #c49a2b; }
        .footer-links ul {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
        }
        .footer-links a { color: #adc4d9; font-size: 14px; }
        .footer-links a:hover { color: #c49a2b; padding-left: 5px; }
        .footer-bottom {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid #1f4057;
        }

        /* 响应式 - 移动端居中对齐优化 */
        @media (max-width: 992px) {
            .equipment-grid { grid-template-columns: repeat(2, 1fr); }
            .case-card { flex: 0 0 calc(50% - 13px); }
            .service-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .hero h1 { font-size: 36px; }
            .hero-btns { flex-direction: column; }
            .services-wrapper { flex-direction: column; }
            .services-sidebar { width: 100%; position: static; }
            .service-card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .single-card { max-width: 100%; }
            .service-more { text-align: center; }
            .advantages-grid { grid-template-columns: 1fr; }
            .equipment-grid { grid-template-columns: 1fr; }
            .case-card { flex: 0 0 100%; }
            .friend-links .links-list { gap: 15px; }

            /* 关于板块移动端居中优化 */
            .about-content {
                flex-direction: column;
                gap: 30px;
            }
            .about-img,
            .about-text {
                min-width: 100%;
                width: 100%;
            }
            .about-text {
                text-align: center;
            }
            .about-features {
                justify-content: center;
            }

            /* 卡片悬浮信息适应小屏 */
            .single-card .single-card-info {
                bottom: 10px;
                left: 10px;
                right: 10px;
                padding: 8px;
            }
            .single-card .single-card-info h3 { font-size: 16px; }
            .single-card .single-card-info p { font-size: 12px; }
        }
        /* 确保所有图片对象覆盖（案例图片已改为contain） */
        .case-card-img img,
        .equipment-card-img img,
        .about-img img,
        .single-card > img {
            object-fit: cover;  /* 这里保留cover，但案例图片单独设置了contain，不受影响 */
            width: 100%;
            height: 100%;
            display: block;
        }