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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 15px;
            line-height: 1.72;
            color: #2e2e2e;
            background-color: #f9fafb;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        /* 主容器 */
        .xn_page-shell {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
            background-color: transparent;
        }

        /* ===== 面包屑导航 ===== */
        .xn_breadcrumb-trail {
            padding: 16px 0 10px;
            font-size: 13px;
            color: #6b7280;
            letter-spacing: 0.02em;
            border-bottom: 1px solid #e9edf2;
            margin-bottom: 0;
        }
        .xn_breadcrumb-trail ol {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 2px;
            padding: 0;
            margin: 0;
        }
        .xn_breadcrumb-trail li {
            display: inline-flex;
            align-items: center;
        }
        .xn_breadcrumb-trail li+li::before {
            content: "›";
            margin: 0 7px;
            color: #b0b7c3;
            font-weight: 400;
            font-size: 15px;
            line-height: 1;
        }
        .xn_breadcrumb-trail a {
            color: #4a5568;
            text-decoration: none;
            transition: color 0.2s;
            font-weight: 400;
        }
        .xn_breadcrumb-trail a:hover {
            color: #1a56db;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .xn_breadcrumb-trail .xn_crumb-current {
            color: #1a202c;
            font-weight: 600;
            pointer-events: none;
        }

        /* ===== Banner 图片区 ===== */
        .xn_hero-media-zone {
            margin: 18px 0 10px;
            border-radius: 6px;
            overflow: hidden;
            background-color: #eef1f5;
            border: 1px solid #e2e6eb;
            position: relative;
            min-height: 180px;
        }
        .xn_hero-media-zone img{
         width: 100%;
         height: auto;
        }
        .xn_hero-media-zone img.xn_banner-thumb {
            display: block;
            width: 100%;
            height: auto;
            max-height: 520px;
            object-fit: contain;
            object-position: center;
            background-color: #f7f8fa;
            border: 0;
            vertical-align: middle;
            /* 确保任何尺寸图片完整显示，不做裁切 */
        }

        /* ===== H1 核心标题区 ===== */
        .xn_primary-heading-block {
            padding: 22px 0 6px;
            margin-bottom: 4px;
        }
        .xn_primary-heading-block h1 {
            font-size: clamp(22px, 3.4vw, 32px);
            font-weight: 700;
            color: #0f172a;
            letter-spacing: 0.01em;
            line-height: 1.35;
            margin: 0;
            padding: 0;
        }
        .xn_primary-heading-block .xn_h1-subline {
            font-size: 15px;
            color: #5f6b7a;
            margin-top: 6px;
            font-weight: 400;
            letter-spacing: 0.02em;
            line-height: 1.5;
        }

        /* ===== 通用区块 ===== */
        .xn_section-block {
            margin: 28px 0;
            padding: 28px 30px;
            background-color: #ffffff;
            border-radius: 7px;
            border: 1px solid #e4e8ed;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
        }
        .xn_section-block h2 {
            font-size: 20px;
            font-weight: 700;
            color: #1a202c;
            margin: 0 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid #1a56db;
            display: inline-block;
            letter-spacing: 0.02em;
        }
        .xn_section-block h3 {
            font-size: 16px;
            font-weight: 600;
            color: #1e293b;
            margin: 14px 0 8px;
            letter-spacing: 0.015em;
        }
        .xn_section-block p {
            margin: 0 0 10px;
            color: #3d4555;
            font-size: 14.5px;
        }
        .xn_section-block ul,
        .xn_section-block ol {
            padding-left: 20px;
            margin: 6px 0 12px;
            color: #3d4555;
            font-size: 14.5px;
        }
        .xn_section-block li {
            margin-bottom: 6px;
            padding-left: 2px;
        }

        /* ===== 痛点卡片网格 ===== */
        .xn_painpoint-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 8px;
        }
        .xn_painpoint-tile {
            flex: 1 1 calc(33.333% - 16px);
            min-width: 250px;
            background: #fafbfc;
            border: 1px solid #e9eef3;
            border-radius: 6px;
            padding: 18px 16px;
            transition: border-color 0.25s, box-shadow 0.25s;
        }
        .xn_painpoint-tile:hover {
            border-color: #bcc7d6;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }
        .xn_painpoint-tile .xn_pp-icon {
            display: inline-block;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: #e8edf5;
            text-align: center;
            line-height: 32px;
            font-size: 15px;
            margin-bottom: 8px;
            color: #1a56db;
            font-weight: 700;
        }
        .xn_painpoint-tile h4 {
            font-size: 15px;
            font-weight: 600;
            color: #1a202c;
            margin: 0 0 4px;
            letter-spacing: 0.02em;
        }
        .xn_painpoint-tile p {
            font-size: 13.5px;
            color: #556170;
            margin: 0;
            line-height: 1.6;
        }

        /* ===== 技术参数透明表 ===== */
        .xn_param-table-wrap {
            overflow-x: auto;
            margin: 10px 0 0;
            -webkit-overflow-scrolling: touch;
        }
        .xn_param-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            min-width: 680px;
        }
        .xn_param-table thead th {
            background: #f1f4f8;
            color: #1a202c;
            font-weight: 600;
            padding: 10px 12px;
            border: 1px solid #dce2e9;
            text-align: left;
            white-space: nowrap;
            letter-spacing: 0.02em;
            font-size: 13.5px;
        }
        .xn_param-table tbody td {
            padding: 10px 12px;
            border: 1px solid #e4e9ef;
            color: #3d4555;
            vertical-align: top;
            font-size: 13.5px;
            line-height: 1.55;
        }
        .xn_param-table tbody tr:nth-child(even) td {
            background: #fafcfd;
        }
        .xn_param-table .xn_td-note {
            font-size: 12px;
            color: #7a8494;
        }

        /* ===== 优势双列布局 ===== */
        .xn_advantage-dual {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 6px;
        }
        .xn_advantage-dual .xn_adv-column {
            flex: 1 1 calc(50% - 20px);
            min-width: 280px;
        }
        .xn_advantage-dual .xn_adv-item {
            padding: 10px 0 10px 22px;
            border-left: 3px solid #dce3ed;
            margin-bottom: 10px;
            transition: border-color 0.2s;
        }
        .xn_advantage-dual .xn_adv-item:hover {
            border-left-color: #1a56db;
        }
        .xn_adv-item strong {
            display: block;
            font-size: 14.5px;
            color: #1a202c;
            margin-bottom: 2px;
        }
        .xn_adv-item span {
            font-size: 13px;
            color: #556170;
        }

        /* ===== 资质标识区 ===== */
        .xn_credential-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: flex-start;
            margin-top: 4px;
        }
        .xn_cred-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #f4f6fa;
            border: 1px solid #dfe4ec;
            border-radius: 20px;
            padding: 7px 14px;
            font-size: 13px;
            color: #1e293b;
            font-weight: 500;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .xn_cred-badge .xn_badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #1a56db;
            flex-shrink: 0;
        }

        /* ===== 服务流程步骤条 ===== */
        .xn_process-track {
            display: flex;
            flex-wrap: wrap;
            gap: 0;
            margin-top: 8px;
            counter-reset: xn-step;
        }
        .xn_process-track .xn_step-node {
            flex: 1 1 calc(20% - 0px);
            min-width: 140px;
            text-align: center;
            position: relative;
            padding: 10px 8px;
            counter-increment: xn-step;
        }
        .xn_step-node::before {
            content: counter(xn-step);
            display: block;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: #1a56db;
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            line-height: 36px;
            margin: 0 auto 8px;
            letter-spacing: 0;
        }
        .xn_step-node::after {
            content: "";
            position: absolute;
            top: 18px;
            right: -50%;
            width: 100%;
            height: 2px;
            background: #e2e7ef;
            z-index: -1;
        }
        .xn_step-node:last-child::after {
            display: none;
        }
        .xn_step-node h4 {
            font-size: 14px;
            font-weight: 600;
            color: #1a202c;
            margin: 0 0 2px;
        }
        .xn_step-node p {
            font-size: 12px;
            color: #6b7280;
            margin: 0;
            line-height: 1.4;
        }

        /* ===== 报价说明区 ===== */
        .xn_quote-infobox {
            background: #f8fafc;
            border: 1px dashed #c5cdd8;
            border-radius: 6px;
            padding: 18px 20px;
            margin-top: 8px;
            font-size: 14px;
            color: #3d4555;
            line-height: 1.7;
        }
        .xn_quote-infobox strong {
            color: #1a202c;
        }

        /* ===== FAQ 折叠感区 ===== */
        .xn_faq-list {
            margin-top: 4px;
        }
        .xn_faq-item {
            border-bottom: 1px solid #e9edf3;
            padding: 13px 0;
        }
        .xn_faq-item h4 {
            font-size: 15px;
            font-weight: 600;
            color: #1a202c;
            margin: 0 0 4px;
            cursor: default;
            letter-spacing: 0.02em;
        }
        .xn_faq-item p {
            font-size: 13.5px;
            color: #556170;
            margin: 0;
            line-height: 1.6;
        }

        /* ===== 提示条 ===== */
        .xn_notice-strip {
            background: #eef4ff;
            border-left: 4px solid #1a56db;
            padding: 12px 16px;
            border-radius: 4px;
            font-size: 13.5px;
            color: #1e3a6e;
            margin: 6px 0;
            letter-spacing: 0.02em;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 900px) {
            .xn_painpoint-tile {
                flex: 1 1 calc(50% - 16px);
            }
            .xn_advantage-dual .xn_adv-column {
                flex: 1 1 100%;
            }
            .xn_process-track .xn_step-node {
                flex: 1 1 calc(33.333% - 0px);
            }
            .xn_process-track .xn_step-node::after {
                right: -33%;
                width: 66%;
            }
            .xn_section-block {
                padding: 20px 16px;
            }
            .xn_credential-strip {
                gap: 8px;
            }
            .xn_cred-badge {
                font-size: 12px;
                padding: 5px 10px;
            }
        }
        @media (max-width: 560px) {
            .xn_painpoint-tile {
                flex: 1 1 100%;
            }
            .xn_process-track .xn_step-node {
                flex: 1 1 50%;
            }
            .xn_process-track .xn_step-node::after {
                right: -25%;
                width: 50%;
            }
            .xn_hero-media-zone {
                min-height: 120px;
            }
            .xn_hero-media-zone img.xn_banner-thumb {
                max-height: 320px;
            }
            .xn_primary-heading-block h1 {
                font-size: 20px;
            }
            .xn_section-block h2 {
                font-size: 17px;
            }
        }