.
        /* 极简重置：仅作用于本页面内容区域，避免与用户头部/底部冲突 */
        .sd-about *,
        .sd-about *::before,
        .sd-about *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            border: 0;
            font-size: 100%;
            vertical-align: baseline;
        }
        /* 主容器：独立命名空间，样式隔离 */
        .sd-about {
            max-width: 1600px;
            margin: 0 auto;
            padding: 2rem 1.5rem;
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            line-height: 1.5;
            color: #1e2b3c;
            background-color: #ffffff;
            margin-top: 100px;
            margin-bottom: 100px;
        }
        /* 所有图片块容器：保证任意尺寸图片都能正确显示（不变形，覆盖区域） */
        .sd-about .img-wrapper {
            display: block;
            width: 100%;
            height: 100%;
            overflow: hidden;
            background-color: #f0f5fa; /* 加载占位色 */
        }
        .sd-about .img-wrapper img {
            display: block;
            width: 100%;
            height: 100%;
            object-fit: cover;      /* 保证图片铺满容器，不变形（可自行按需改为contain） */
            transition: transform 0.2s ease;
        }
        /* 标题与文本 */
        .sd-about h1 {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1rem;
            color: #003366;          /* 深蓝，契合制冷行业 */
            letter-spacing: -0.02em;
            padding-top: 60px;
        }
        .sd-about h2 {
            font-size: 2rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: #0a2a44;
            position: relative;
            padding-bottom: 0.75rem;
        }
        .sd-about h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: #00a0e9;     /* 冰蓝色点缀 */
            border-radius: 2px;
        }
        .sd-about h3 {
            font-size: 1.35rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #1e3a5f;
        }
        .sd-about p {
            margin-bottom: 1rem;
            color: #2c3e50;
        }
        /* 布局：flex / grid 响应式 */
        .sd-about .hero-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin-bottom: 4rem;
            align-items: center;
        }
        .sd-about .hero-info {
            flex: 1 1 45%;
            min-width: 280px;
            text-indent: 2em;
        }
        .sd-about .hero-image {
            flex: 1 1 45%;
            min-width: 280px;
            aspect-ratio: 4 / 3;       /* 固定宽高比，图片自适应覆盖 */
            border-radius: 20px;
            box-shadow: 0 20px 30px -10px rgba(0, 40, 80, 0.2);
            background-color: #e2edf7;
        }
        .sd-about .hero-image .img-wrapper {
            border-radius: 20px;
        }
        /* 数据统计卡片 */
        .sd-about .stats-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            justify-content: space-between;
            margin: 3rem 0 4rem;
        }
        .sd-about .stat-card {
            flex: 1 1 180px;
            background: #f3f9ff;
            border-radius: 28px;
            padding: 1.8rem 1rem;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0, 50, 90, 0.06);
            transition: all 0.2s;
            border: 1px solid rgba(0, 160, 233, 0.15);
        }
        .sd-about .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: #003d66;
            line-height: 1;
            margin-bottom: 0.25rem;
        }
        .sd-about .stat-label {
            font-size: 1rem;
            letter-spacing: 0.5px;
            color: #2c5779;
            font-weight: 500;
        }
        /* 核心价值观/优势 (三卡片) 使用emoji代替图标，零依赖 */
        .sd-about .values-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            margin: 3rem 0 4rem;
        }
        .sd-about .value-item {
            flex: 1 1 220px;
            background: #ffffff;
            padding: 2rem 1.5rem;
            border-radius: 30px;
            box-shadow: 0 12px 24px -8px rgba(0, 60, 100, 0.12);
            border: 1px solid #eaf0f6;
            transition: transform 0.2s;
        }
        .sd-about .value-item:hover {
            transform: translateY(-6px);
        }
        .sd-about .value-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
            line-height: 1;
        }
        .sd-about .value-item h3 {
            margin-bottom: 0.75rem;
        }
        /* 团队网格 */
        .sd-about .team-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem 2rem;
            margin-top: 2rem;
            justify-content: center;
        }
        .sd-about .team-member {
            flex: 0 1 260px;
            text-align: center;
            background: #fafcff;
            padding: 1.8rem 1rem 1.5rem;
            border-radius: 40px 40px 30px 30px;
            box-shadow: 0 8px 18px rgba(0, 45, 80, 0.06);
            transition: all 0.2s;
        }
        .sd-about .member-photo {
            width: 160px;
            height: 160px;
            margin: 0 auto 1.2rem;
            border-radius: 50%;
            overflow: hidden;
            box-shadow: 0 12px 18px -6px rgba(0, 70, 120, 0.2);
            border: 3px solid white;
            background: #d9e9f5;
        }
        .sd-about .member-photo .img-wrapper {
            border-radius: 50%;
        }
        .sd-about .member-name {
            font-size: 1.4rem;
            font-weight: 700;
            color: #002b4a;
            margin-bottom: 0.25rem;
        }
        .sd-about .member-title {
            font-size: 0.95rem;
            color: #2f5c88;
            letter-spacing: 0.3px;
            font-weight: 500;
        }
        /* 合作伙伴/荣誉 (简单logo区) 同样使用图片占位 */
        .sd-about .partners {
            margin-top: 4rem;
            padding-top: 2rem;
            border-top: 1px solid #d9e6f2;
        }
        .sd-about .partners h2 {
            margin-bottom: 2rem;
        }
        .sd-about .partner-logos {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem 1.5rem;
            align-items: center;
            justify-content: flex-start;
        }
        .sd-about .logo-item {
            flex: 0 1 140px;
            aspect-ratio: 3 / 2;
            border-radius: 16px;
            background: #f2f7fc;
            padding: 0.5rem;
            transition: all 0.1s;
            border: 1px solid #dbeafe;
        }
        .sd-about .logo-item .img-wrapper {
            border-radius: 10px;
        }
        /* 响应式微调 */
        @media (max-width: 640px) {
            .sd-about h1 { font-size: 2rem; }
            .sd-about h2 { font-size: 1.75rem; }
            .sd-about .hero-grid { gap: 1.5rem; }
            .sd-about .member-photo { width: 140px; height: 140px; }
            .sd-about .stat-card { padding: 1.2rem 0.5rem; }
            .sd-about .stat-number { font-size: 2rem; }
        }
        @media (max-width: 480px) {
            .sd-about { padding: 1.5rem 1rem; }
            .sd-about .team-member { flex-basis: 100%; max-width: 280px; }
        }
        /* 辅助：清除浮动，确保图片无溢出 */
        .sd-about .clearfix::after {
            content: "";
            display: table;
            clear: both;
        }
        /* 保证任何图片容器背景中性 */
        .sd-about .img-wrapper {
            background: #d4e2f0;  /* 柔光灰蓝 */
        }
        /* 可定制性：所有图片替换后依然完美适应 */