.xn_solution_wrap {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            color: #2c3e3f;
            line-height: 1.72;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px 60px;
            box-sizing: border-box;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        .xn_solution_wrap *,
        .xn_solution_wrap *::before,
        .xn_solution_wrap *::after {
            box-sizing: border-box;
        }

        /* ---- 面包屑 ---- */
        .xn_bread_trail {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            padding: 18px 0 10px;
            font-size: 14px;
            color: #6b7b7d;
            letter-spacing: 0.3px;
            border-bottom: 1px solid #e9ecee;
            margin-bottom: 0;
            list-style: none;
            gap: 6px;
        }
        .xn_bread_trail li {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .xn_bread_trail a {
            color: #4a5c5e;
            text-decoration: none;
            transition: color 0.2s;
            font-weight: 400;
        }
        .xn_bread_trail a:hover {
            color: #1a6e7a;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .xn_bread_sep {
            color: #bcc4c6;
            font-size: 12px;
            user-select: none;
        }
        .xn_bread_current {
            color: #1a3c3f;
            font-weight: 600;
            pointer-events: none;
        }

        /* ---- Banner 图片区（栏目缩略图 · 长方形 · 百分百完整显示） ---- */
        .xn_hero_visual {
            width: 100%;
            margin: 24px 0 28px;
            border-radius: 8px;
            overflow: hidden;
            background: #f4f6f7;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 200px;
            max-height: 480px;
            border: 1px solid #e3e7e9;
        }
        .xn_hero_visual img {
            display: block;
            width: 100%;
            height: auto;
            max-height: 460px;
            object-fit: contain;
            object-position: center;
            /* 确保无论原图多大，百分百显示齐全，不被裁剪 */
        }

        /* ---- H1 核心标题 ---- */
        .xn_main_title {
            font-size: 28px;
            font-weight: 700;
            color: #152b2d;
            margin: 0 0 16px;
            padding: 0;
            letter-spacing: 0.6px;
            line-height: 1.35;
            border-left: 4px solid #1a6e7a;
            padding-left: 16px;
        }
        .xn_main_title .xn_city_tag {
            color: #1a6e7a;
            font-weight: 700;
        }

        /* ---- 方案简述 ---- */
        .xn_intro_graf {
            font-size: 16px;
            color: #3d5052;
            margin: 0 0 32px;
            padding: 18px 22px;
            background: #f8fafa;
            border-radius: 6px;
            border: 1px solid #eef2f3;
            line-height: 1.8;
            letter-spacing: 0.2px;
        }

        /* ---- 章节标题 ---- */
        .xn_sect_heading {
            font-size: 22px;
            font-weight: 700;
            color: #1a3c3f;
            margin: 42px 0 18px;
            padding: 0 0 12px;
            border-bottom: 2px solid #e0e8ea;
            letter-spacing: 0.4px;
            position: relative;
        }
        .xn_sect_heading::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 60px;
            height: 2px;
            background: #1a6e7a;
            border-radius: 1px;
        }
        .xn_sect_subheading {
            font-size: 18px;
            font-weight: 600;
            color: #1d4548;
            margin: 28px 0 12px;
            letter-spacing: 0.3px;
        }

        /* ---- 痛点卡片网格 ---- */
        .xn_pain_grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
            margin: 20px 0 30px;
        }
        .xn_pain_card {
            background: #fff;
            border: 1px solid #e5ebed;
            border-radius: 8px;
            padding: 22px 20px 20px;
            transition: box-shadow 0.25s, border-color 0.25s;
            position: relative;
            border-top: 3px solid #d4815e;
        }
        .xn_pain_card:hover {
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
            border-color: #c9d3d6;
        }
        .xn_pain_card .xn_pain_icon {
            font-size: 28px;
            margin-bottom: 8px;
            display: block;
        }
        .xn_pain_card h4 {
            margin: 0 0 8px;
            font-size: 16px;
            font-weight: 700;
            color: #1a3c3f;
            letter-spacing: 0.3px;
        }
        .xn_pain_card p {
            margin: 0;
            font-size: 14px;
            color: #5a6e70;
            line-height: 1.65;
        }

        /* ---- 适用客户标签 ---- */
        .xn_client_tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin: 16px 0 28px;
        }
        .xn_client_tag {
            display: inline-block;
            background: #edf5f6;
            color: #1a4d52;
            padding: 9px 18px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.3px;
            border: 1px solid #d4e3e5;
            transition: background 0.2s;
        }
        .xn_client_tag:hover {
            background: #dcecee;
        }

        /* ---- 优势列表 ---- */
        .xn_adv_list {
            list-style: none;
            padding: 0;
            margin: 16px 0 28px;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 16px;
        }
        .xn_adv_list li {
            background: #fafcfc;
            border: 1px solid #e9eff0;
            border-radius: 6px;
            padding: 16px 18px;
            font-size: 15px;
            color: #2c4547;
            line-height: 1.6;
            position: relative;
            padding-left: 38px;
        }
        .xn_adv_list li::before {
            content: '◆';
            position: absolute;
            left: 16px;
            top: 16px;
            color: #1a6e7a;
            font-size: 11px;
            line-height: 1;
        }

        /* ---- 技术参数表 ---- */
        .xn_spec_table_wrap {
            overflow-x: auto;
            margin: 20px 0 30px;
            -webkit-overflow-scrolling: touch;
        }
        .xn_spec_table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            min-width: 680px;
            background: #fff;
            border-radius: 6px;
            overflow: hidden;
            border: 1px solid #e2e8ea;
        }
        .xn_spec_table thead th {
            background: #1a3c3f;
            color: #fff;
            padding: 13px 14px;
            font-weight: 600;
            letter-spacing: 0.4px;
            text-align: left;
            font-size: 14px;
            white-space: nowrap;
        }
        .xn_spec_table tbody td {
            padding: 12px 14px;
            border-bottom: 1px solid #eef2f3;
            color: #3d5052;
            vertical-align: top;
            line-height: 1.55;
        }
        .xn_spec_table tbody tr:nth-child(even) {
            background: #f9fbfb;
        }
        .xn_spec_table tbody tr:hover {
            background: #f2f7f8;
        }
        .xn_spec_note {
            font-size: 13px;
            color: #8a999b;
            margin-top: 8px;
            line-height: 1.6;
        }

        /* ---- 资质认证区 ---- */
        .xn_cert_block {
            background: #fafcfc;
            border: 1px solid #e5ebed;
            border-radius: 8px;
            padding: 24px 22px;
            margin: 20px 0 30px;
        }
        .xn_cert_grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 10px 16px;
            list-style: none;
            padding: 0;
            margin: 14px 0 0;
        }
        .xn_cert_grid li {
            font-size: 14px;
            color: #2c4547;
            padding: 7px 0 7px 22px;
            position: relative;
            line-height: 1.5;
            border-bottom: 1px dotted #e0e6e8;
        }
        .xn_cert_grid li::before {
            content: '✓';
            position: absolute;
            left: 0;
            top: 7px;
            color: #1a6e7a;
            font-weight: 700;
            font-size: 13px;
        }

        /* ---- 服务流程 ---- */
        .xn_serve_flow {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 16px;
            margin: 20px 0 30px;
        }
        .xn_flow_step {
            background: #fff;
            border: 1px solid #e5ebed;
            border-radius: 8px;
            padding: 20px 16px;
            text-align: center;
            position: relative;
            transition: box-shadow 0.25s;
        }
        .xn_flow_step:hover {
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
        }
        .xn_flow_num {
            display: inline-block;
            width: 36px;
            height: 36px;
            line-height: 36px;
            border-radius: 50%;
            background: #1a6e7a;
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 10px;
        }
        .xn_flow_step h5 {
            margin: 0 0 6px;
            font-size: 15px;
            font-weight: 700;
            color: #1a3c3f;
        }
        .xn_flow_step p {
            margin: 0;
            font-size: 13px;
            color: #5a6e70;
            line-height: 1.55;
        }

        /* ---- 报价参考 ---- */
        .xn_quote_block {
            background: #fdfaf7;
            border: 1px solid #ede3da;
            border-radius: 8px;
            padding: 22px 20px;
            margin: 20px 0 30px;
        }
        .xn_quote_block h3 {
            margin: 0 0 12px;
            font-size: 18px;
            font-weight: 700;
            color: #1a3c3f;
        }
        .xn_quote_factors {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 12px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .xn_quote_factors li {
            font-size: 14px;
            color: #4a5c5e;
            padding: 8px 12px;
            background: #fff;
            border-radius: 4px;
            border: 1px solid #f0e8e0;
            line-height: 1.5;
        }
        .xn_quote_factors li strong {
            color: #1a3c3f;
            font-weight: 600;
        }

        /* ---- 透明参数提示框 ---- */
        .xn_transparent_note {
            background: #fffef9;
            border: 1px solid #e8e2d0;
            border-left: 4px solid #c9a96e;
            border-radius: 0 6px 6px 0;
            padding: 16px 18px;
            margin: 24px 0;
            font-size: 14px;
            color: #5a4d3a;
            line-height: 1.7;
        }
        .xn_transparent_note strong {
            color: #3d2e18;
        }

        /* ---- 材料品牌说明 ---- */
        .xn_brand_note {
            font-size: 14px;
            color: #5a6e70;
            line-height: 1.7;
            margin: 16px 0;
            padding: 14px 18px;
            background: #f8fafa;
            border-radius: 6px;
            border: 1px solid #eef2f3;
        }

        /* ---- 响应式 ---- */
        @media (max-width: 768px) {
            .xn_solution_wrap {
                padding: 0 14px 40px;
            }
            .xn_main_title {
                font-size: 22px;
                padding-left: 12px;
                border-left-width: 3px;
            }
            .xn_sect_heading {
                font-size: 19px;
                margin: 32px 0 14px;
            }
            .xn_pain_grid,
            .xn_adv_list,
            .xn_serve_flow,
            .xn_quote_factors,
            .xn_cert_grid {
                grid-template-columns: 1fr;
            }
            .xn_hero_visual {
                min-height: 150px;
                max-height: 300px;
            }
            .xn_hero_visual img {
                max-height: 280px;
            }
            .xn_client_tags {
                gap: 8px;
            }
            .xn_client_tag {
                padding: 7px 14px;
                font-size: 13px;
            }
        }
        @media (max-width: 480px) {
            .xn_main_title {
                font-size: 19px;
            }
            .xn_sect_heading {
                font-size: 17px;
            }
            .xn_bread_trail {
                font-size: 12px;
                flex-wrap: wrap;
            }
            .xn_spec_table {
                font-size: 12px;
                min-width: 520px;
            }
            .xn_spec_table thead th,
            .xn_spec_table tbody td {
                padding: 9px 8px;
            }
        }