.xn_page_shell {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            color: #2c2c2c;
            line-height: 1.72;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
            box-sizing: border-box;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            background: #fff;
        }

        .xn_page_shell *,
        .xn_page_shell *::before,
        .xn_page_shell *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        /* ----- 面包屑导航 ----- */
        .xn_path_trail {
            padding: 18px 0 10px 0;
            font-size: 13px;
            color: #6b6b6b;
            letter-spacing: 0.3px;
            border-bottom: 1px solid #ececec;
            margin-bottom: 0;
        }
        .xn_path_trail ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .xn_path_trail li {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .xn_path_trail a {
            color: #4a4a4a;
            text-decoration: none;
            transition: color 0.2s;
            font-weight: 400;
        }
        .xn_path_trail a:hover {
            color: #1a6e4a;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .xn_path_sep {
            color: #bfbfbf;
            font-size: 11px;
            user-select: none;
            margin: 0 2px;
        }
        .xn_path_current {
            color: #1a1a1a;
            font-weight: 600;
            pointer-events: none;
        }

        /* ----- H1 主标题区 ----- */
        .xn_primary_head_block {
            padding: 28px 0 16px 0;
            border-bottom: 2px solid #e8e8e8;
            margin-bottom: 24px;
        }
        .xn_primary_head_block h1 {
            font-size: 30px;
            font-weight: 700;
            color: #1a1a1a;
            letter-spacing: 0.8px;
            line-height: 1.35;
            margin-bottom: 10px;
        }
        .xn_primary_head_block .xn_sub_tagline {
            font-size: 15px;
            color: #5c5c5c;
            letter-spacing: 0.4px;
            font-weight: 400;
        }

        /* ----- 服务概述卡片区 ----- */
        .xn_overview_grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-bottom: 32px;
            align-items: stretch;
        }
        @media (max-width: 768px) {
            .xn_overview_grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .xn_overview_text_card {
            background: #f9faf9;
            border-radius: 6px;
            padding: 24px 26px 20px 26px;
            border-left: 4px solid #1a6e4a;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .xn_overview_text_card p {
            font-size: 15px;
            color: #3a3a3a;
            line-height: 1.8;
            margin-bottom: 8px;
        }
        .xn_overview_text_card p:last-child {
            margin-bottom: 0;
        }
        .xn_overview_text_card .xn_highlight_param {
            font-weight: 700;
            color: #1a6e4a;
            font-size: 16px;
        }
        .xn_overview_img_holder {
            border-radius: 6px;
            overflow: hidden;
            background: #eef1ee;
            position: relative;
            aspect-ratio: 4 / 3;
            min-height: 220px;
        }
        .xn_overview_img_holder img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.4s ease;
        }
        .xn_overview_img_holder img:hover {
            transform: scale(1.03);
        }
        /* 图片占位提示 - 替换图片后自动消失 */
        .xn_overview_img_holder .xn_img_placeholder_note {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: #999;
            font-size: 13px;
            pointer-events: none;
            text-align: center;
            z-index: 1;
        }

        /* ----- 技术参数透明区 ----- */
        .xn_tech_params_section {
            margin-bottom: 32px;
            background: #fdfdfb;
            border: 1px solid #e4e4dc;
            border-radius: 6px;
            padding: 22px 26px 18px 26px;
        }
        .xn_tech_params_section h2 {
            font-size: 21px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 6px;
            letter-spacing: 0.5px;
        }
        .xn_tech_params_section .xn_section_intro {
            font-size: 14px;
            color: #666;
            margin-bottom: 16px;
            line-height: 1.7;
        }
        .xn_param_table_wrap {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            margin-bottom: 14px;
        }
        .xn_param_table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            min-width: 680px;
        }
        .xn_param_table th {
            background: #f2f5f2;
            color: #2a2a2a;
            font-weight: 600;
            padding: 10px 12px;
            text-align: left;
            border-bottom: 2px solid #d5d5d0;
            font-size: 13px;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .xn_param_table td {
            padding: 9px 12px;
            border-bottom: 1px solid #eaeae5;
            color: #3a3a3a;
            vertical-align: top;
            line-height: 1.6;
        }
        .xn_param_table tr:hover td {
            background: #fafbf8;
        }
        .xn_volume_loss_note {
            background: #fffbf0;
            border-left: 3px solid #e6a817;
            padding: 12px 16px;
            margin-top: 12px;
            border-radius: 0 4px 4px 0;
            font-size: 13px;
            color: #5c4a1a;
            line-height: 1.7;
        }
        .xn_volume_loss_note strong {
            color: #8b5e14;
        }

        /* ----- 温区方案卡片 ----- */
        .xn_tempzone_row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-bottom: 32px;
        }
        @media (max-width: 768px) {
            .xn_tempzone_row {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .xn_zone_card {
            background: #fff;
            border: 1px solid #e6e6e0;
            border-radius: 6px;
            padding: 20px 18px 16px 18px;
            transition: border-color 0.25s, box-shadow 0.25s;
            position: relative;
        }
        .xn_zone_card:hover {
            border-color: #1a6e4a;
            box-shadow: 0 2px 14px rgba(26, 110, 74, 0.08);
        }
        .xn_zone_card h3 {
            font-size: 17px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 6px;
            letter-spacing: 0.4px;
        }
        .xn_zone_temp_tag {
            display: inline-block;
            background: #eaf5ed;
            color: #1a6e4a;
            font-weight: 700;
            font-size: 13px;
            padding: 3px 10px;
            border-radius: 3px;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .xn_zone_card p {
            font-size: 13px;
            color: #555;
            line-height: 1.65;
            margin-bottom: 6px;
        }
        .xn_zone_card .xn_zone_suitable {
            font-size: 12px;
            color: #777;
            line-height: 1.55;
        }

        /* ----- 工程流程 ----- */
        .xn_flow_section {
            margin-bottom: 32px;
        }
        .xn_flow_section h2 {
            font-size: 21px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .xn_flow_steps {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 14px;
            counter-reset: xn_step_counter;
        }
        @media (max-width: 900px) {
            .xn_flow_steps {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }
        }
        @media (max-width: 540px) {
            .xn_flow_steps {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
        }
        .xn_flow_step_card {
            background: #f9faf9;
            border-radius: 6px;
            padding: 18px 14px 14px 14px;
            text-align: center;
            position: relative;
            border: 1px solid #eaeaea;
            counter-increment: xn_step_counter;
        }
        .xn_flow_step_card::before {
            content: counter(xn_step_counter, decimal-leading-zero);
            display: block;
            font-size: 28px;
            font-weight: 800;
            color: #1a6e4a;
            letter-spacing: 1px;
            margin-bottom: 8px;
            line-height: 1;
        }
        .xn_flow_step_card h4 {
            font-size: 14px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 4px;
        }
        .xn_flow_step_card p {
            font-size: 12px;
            color: #666;
            line-height: 1.5;
        }

        /* ----- 配套设备与材料 ----- */
        .xn_equip_section {
            margin-bottom: 32px;
            background: #fafcfa;
            border-radius: 6px;
            padding: 22px 26px 18px 26px;
            border: 1px solid #e6ece6;
        }
        .xn_equip_section h2 {
            font-size: 21px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 6px;
            letter-spacing: 0.5px;
        }
        .xn_equip_section .xn_section_intro {
            font-size: 14px;
            color: #666;
            margin-bottom: 14px;
            line-height: 1.7;
        }
        .xn_equip_grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        @media (max-width: 600px) {
            .xn_equip_grid {
                grid-template-columns: 1fr;
            }
        }
        .xn_equip_item {
            background: #fff;
            border-radius: 5px;
            padding: 14px 16px;
            border: 1px solid #e8e8e2;
        }
        .xn_equip_item h4 {
            font-size: 15px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 4px;
        }
        .xn_equip_item p {
            font-size: 13px;
            color: #555;
            line-height: 1.6;
        }
        .xn_equip_item .xn_brand_note {
            font-size: 12px;
            color: #888;
            font-style: italic;
            margin-top: 3px;
        }

        /* ----- 规模适应说明 ----- */
        .xn_scale_section {
            margin-bottom: 32px;
        }
        .xn_scale_section h2 {
            font-size: 21px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .xn_scale_cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }
        @media (max-width: 768px) {
            .xn_scale_cards {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }
        .xn_scale_card {
            background: #fff;
            border: 1px solid #e6e6e0;
            border-radius: 6px;
            padding: 18px 16px;
            border-top: 4px solid #1a6e4a;
        }
        .xn_scale_card h4 {
            font-size: 16px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 4px;
        }
        .xn_scale_card .xn_scale_range {
            font-size: 13px;
            color: #1a6e4a;
            font-weight: 600;
            margin-bottom: 6px;
            display: block;
        }
        .xn_scale_card p {
            font-size: 13px;
            color: #555;
            line-height: 1.6;
        }

        /* ----- 应用场景 ----- */
        .xn_scene_section {
            margin-bottom: 32px;
        }
        .xn_scene_section h2 {
            font-size: 21px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .xn_scene_tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .xn_scene_tag {
            background: #f4f7f4;
            border: 1px solid #dce4dc;
            border-radius: 20px;
            padding: 8px 18px;
            font-size: 14px;
            color: #3a3a3a;
            letter-spacing: 0.3px;
            transition: all 0.2s;
            cursor: default;
        }
        .xn_scene_tag:hover {
            background: #e8f0e8;
            border-color: #1a6e4a;
            color: #1a6e4a;
        }

        /* ----- 常见技术问答 ----- */
        .xn_faq_section {
            margin-bottom: 32px;
        }
        .xn_faq_section h2 {
            font-size: 21px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .xn_faq_list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .xn_faq_item {
            border: 1px solid #eaeae5;
            border-radius: 5px;
            padding: 16px 18px;
            background: #fdfdfb;
            transition: border-color 0.2s;
        }
        .xn_faq_item:hover {
            border-color: #c5c5bb;
        }
        .xn_faq_item h4 {
            font-size: 15px;
            font-weight: 700;
            color: #1a1a1a;
            margin-bottom: 6px;
            cursor: default;
        }
        .xn_faq_item p {
            font-size: 13px;
            color: #555;
            line-height: 1.7;
        }

        /* ----- CTA 转化区 ----- */
        .xn_cta_block {
            background: #1a1f1b;
            border-radius: 8px;
            padding: 30px 32px 26px 32px;
            text-align: center;
            margin-bottom: 28px;
            color: #e8e8e0;
        }
        .xn_cta_block h3 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.6px;
        }
        .xn_cta_block p {
            font-size: 14px;
            color: #c0c0b8;
            margin-bottom: 16px;
            line-height: 1.7;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .xn_cta_block .xn_cta_contact_line {
            font-size: 15px;
            color: #e0e0d6;
            letter-spacing: 0.4px;
        }
        .xn_cta_block .xn_cta_phone_highlight {
            font-size: 26px;
            font-weight: 800;
            color: #f0c040;
            letter-spacing: 1.5px;
            display: inline-block;
            margin: 0 6px;
            text-decoration: none;
        }
        .xn_cta_block .xn_cta_phone_highlight:hover {
            color: #f5d560;
        }

        /* ----- 辅助调整 ----- */
        .xn_text_small_note {
            font-size: 12px;
            color: #999;
            line-height: 1.5;
            margin-top: 4px;
        }
        .xn_divider_light {
            border: none;
            border-top: 1px solid #e8e8e0;
            margin: 10px 0;
        }