* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", PingFang SC, sans-serif;
        }
        body {
            background: linear-gradient(180deg, #edf6ff 0%, #ffffff 100%);
            color: #333;
            padding: 0;
            line-height: 1.6;
        }
        .container {
            width: 1230px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===================== 顶部导航全局样式【复刻截图改版核心】 ===================== */
        /* 导航顶部通栏：深蓝色全屏背景 */
        .header-nav-wrap {
            background: #1a6ff1; /* 匹配截图深蓝色底色 */
            box-shadow: 0 2px 8px rgba(0,0,0,0.12);
            position: sticky;
            top: 0;
            z-index: 999;
            width: 100%;
        }
        .header-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 58px;
        }
        /* Logo区域：购知 Check 文字样式 */
        .nav-logo a {
            font-size: 30px;
            font-weight: 700;
            color: #ffffff;
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        /* Check 橙色手写字体单独配色 */
        .logo-check-text {
            color: #ff7826;
            font-style: italic;
            font-family: cursive;
            font-size: 34px;
        }
        /* 主导航菜单 */
        .nav-menu {
            display: flex;
            height: 120%;
        }
        .nav-item {
            position: relative;
            padding: 0 16px;
            height: 70px;
            display: flex;
            align-items: center;
        }
        .nav-item > a {
            color: #ffffff; /* 导航文字白色 */
            text-decoration: none;
            font-size: 16px;
            transition: color 0.25s;
        }
        .nav-item.active > a,
        .nav-item:hover > a {
            color: #ff9845; /* hover高亮橙色，贴合截图色调 */
        }
        /* 导航下划线高亮（激活项底部白线） */
        .nav-item.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: #fff;
        }
        /* ========== 移除原有下拉子菜单 全部一级菜单 ========== */
        .sub-nav {
            display: none !important;
        }

        /* 移动端汉堡菜单 默认隐藏 */
        .hamburger {
            display: none;
            font-size: 28px;
            color: #fff;
            cursor: pointer;
        }

        /* 面包屑导航 SEO必备 */
        .breadcrumb {
            padding: 16px 0;
            font-size: 14px;
            color: #666;
        }
        .breadcrumb a {
            color: #1967e0;
            text-decoration: none;
        }
        .breadcrumb span {
            margin: 0 8px;
            color: #ccc;
        }

        /* 顶部右上角小图标 */
        .top-icons {
            text-align: right;
            margin-bottom: 20px;
        }
        .top-icons span {
            width: 32px;
            height: 32px;
            display: inline-block;
            border-radius: 50%;
            background: #fff;
            margin-left: 12px;
            vertical-align: middle;
            box-shadow: 0 1px 4px rgba(20,80,180,0.08);
        }

        /* 头部标题区域 H1唯一主标题 SEO核心 */
        .header-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .header-title h1 {
            font-size: 38px;
            font-weight: 600;
            color: #1a1a1a;
            margin-bottom: 14px;
        }
        .header-title p {
            font-size: 19px;
            color: #606672;
            margin-bottom: 36px;
        }

        /* 搜索栏 织梦标准搜索表单 */
        .search-bar {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 0;
            margin-bottom: 42px;
        }
        .search-input {
            width: 640px;
            height: 54px;
            border: 1px solid #e1eaf7;
            border-radius: 28px 0 0 28px;
            padding: 0 28px;
            font-size: 16px;
            background: #fff;
            outline: none;
            color: #555;
        }
        .search-btn {
            height: 54px;
            padding: 0 40px;
            background: #3180fb;
            color: #fff;
            border: none;
            border-radius: 0 28px 28px 0;
            font-size: 17px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .search-btn:hover {
            background: #1558c8;
        }

        /* 查重服务卡片区域 H2板块标题 */
        .service-card-wrap {
            background: #ffffff;
            border-radius: 18px;
            padding: 32px 26px;
            box-shadow: 0 2px 18px rgba(22, 100, 220, 0.06);
            margin-bottom: 46px;
        }
        .service-top-title h2 {
            font-size: 24px;
            color: #040404;
            margin-bottom: 8px;
            font-weight: 500;
            text-align: center;
        }
        .service-top-title p {
            font-size: 15px;
            color: #666;
            text-align: center;
            margin-bottom:30px;
        }
        /* 网格布局：5列2行 */
        .service-grid-wrap {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 18px;
            row-gap: 26px;
        }
        /* 单个服务卡片样式 */
        .service-card {
            display: block;
            text-decoration: none;
            border: 1px solid #e4edfa;
            border-radius: 14px;
            padding: 16px 12px;
            background: #fff;
            transition: all 0.25s ease;
        }
        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 16px rgba(25, 103, 224, 0.12);
            border-color: #b4d3f8;
        }
        /* logo图标区域 全部补充alt图片属性 */
        .card-icon {
            width: 70px;
            margin: 0 auto 12px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .card-icon img {
            max-height: 100%;
            object-fit: contain;
        }
        .service-card h4 {
            text-align: center;
            font-size: 17px;
            color: #e53e3e;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .service-card p {
            font-size: 13px;
            color: #555;
            line-height: 1.55;
            text-align: center;
        }

        /* 四步流程 H2标题 */
        .step-flow-title {
            font-size:22px;
            color:#005df9;
            text-align:center;
            margin-bottom:30px;
            font-weight:500;
        }
        .step-flow {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 50px;
        }
        .step-item {
            text-align: center;
            flex: 1;
        }
        .step-circle {
            width: 46px;
            height: 46px;
            border: 2px solid #b4d3f8;
            border-radius: 50%;
            margin: 0 auto 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #1967e0;
            background: #fff;
        }
        .step-line {
            width: 70px;
            background: #c7daf5;
            position: relative;
        }
        .step-line::after {
            content: "+";
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            color: #1967e0;
            font-size: 22px;
        }
        .step-item h4 {
            font-size: 17px;
            color: #222;
        }
        .step-item small {
            font-size: 13px;
            color: #777;
        }

        /* 下方双栏布局 */
        .two-col-box {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            margin-bottom: 60px;
        }
        .col-left, .col-right {
            background: #fff;
            border-radius: 18px;
            padding: 25px;
            box-shadow: 0 2px 16px rgba(22, 100, 220, 0.06);
        }
        .col-title {
            font-size: 20px;
            color: #222;
            margin-bottom: 26px;
            font-weight: 500;
        }

        /* 查重报告轮播 */
        .report-slider-wrap {
            width: 100%;
            margin-bottom: 28px;
        }
        .report-slider-box {
            position: relative;
            overflow: hidden;
            border-radius: 12px;
            border:1px solid #e4edfa;
        }
        .report-track {
            display: flex;
            transition: transform 0.45s ease;
        }
        .report-item {
            min-width: 100%;
            padding: 15px;
        }
        .report-item img {
            width: 100%;
            border-radius: 8px;
            display:block;
            border:1px solid #eee;
        }
        .report-name {
            text-align: center;
            margin-top:12px;
            font-size:15px;
            color:#333;
        }
        .report-prev,.report-next {
            position:absolute;
            top:50%;
            transform:translateY(-50%);
            width:36px;
            height:36px;
            border-radius:50%;
            border:none;
            background:#fff;
            color:#1967e0;
            font-size:16px;
            cursor:pointer;
            box-shadow:0 2px 8px rgba(0,0,0,0.1);
            z-index:5;
        }
        .report-prev {left:10px;}
        .report-next {right:10px;}
        .report-prev:hover,.report-next:hover {
            background:#1967e0;
            color:#fff;
        }
        .report-dots {
            display:flex;
            gap:8px;
            justify-content:center;
            margin-top:16px;
        }
        .report-dot {
            width:10px;
            height:10px;
            border-radius:50%;
            background:#ddd;
            cursor:pointer;
        }
        .report-dot.active {
            background:#1967e0;
            width:22px;
            border-radius:6px;
        }

        /* 左侧对比表格 */
        .table-list {
            width: 100%;
            border-collapse: collapse;
        }
        .table-list th, .table-list td {
            padding: 12px 5px;
            text-align: center;
            font-size: 14px;
            color: #444;
            border-bottom: 1px solid #f0f5fc;
        }
        .table-list th {
            background:#f8fbff;
            color: #1967e0;
            font-weight: 500;
        }
        .table-price {
            color: #e53e3e;
            font-weight:500;
        }
        .table-btn {
            padding: 5px 12px;
            background: #508eef;
            color: #fff;
            border-radius: 14px;
            font-size: 12px;
            text-decoration: none;
        }
        .table-btn:hover {
            background:#1558c8;
        }

        /* 右侧核验功能模块 */
        .verify-top {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 26px;
        }
        .verify-item {
            display: flex;
            align-items: center;
            gap: 10px;
            border: 1px solid #e4edfa;
            border-radius: 10px;
            padding: 12px;
        }
        .verify-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border:1px solid #1967e0;
            display:flex;
            align-items:center;
            justify-content:center;
            color:#1967e0;
        }
        .verify-text p {
            font-size:14px;
            color:#333;
        }
        .verify-text small {
            font-size:12px;
            color:#777;
        }
        .func-grid {
            display: grid;
            grid-template-columns: repeat(3,1fr);
            gap:16px;
        }
        .func-card {
            text-align:center;
            padding:16px 8px;
            border:1px solid #e4edfa;
            border-radius:12px;
        }
        .func-icon {
            width:40px;
            height:40px;
            margin:0 auto 10px;
            border:1px solid #1967e0;
            border-radius:50%;
            display:flex;
            align-items:center;
            justify-content:center;
            color:#1967e0;
            font-size:20px;
        }
        .func-card p {
            font-size:14px;
            color:#333;
        }

 

        /* 学术知识库板块 */
        .article-box {
            background: #fff;
            border: 1px solid #e7edf8;
            border-radius: 16px;
            box-shadow: 0 2px 10px rgba(190, 210, 240, 0.1);
            padding: 34px 30px;
            max-width: 100%;
            margin-bottom:60px;
        }
        .box-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 38px;
        }
        .top-left {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .book-icon {
            font-size: 26px;
        }
        .main-title {
            font-size: 27px;
            color: #161616;
            font-weight: 600;
        }
        .tip-text {
            color: #9298a5;
            font-size: 15px;
        }
        .top-right a {
            padding: 7px 20px;
            background: #f1f7ff;
            border: 1px solid #cce0fc;
            border-radius: 22px;
            color: #2876e3;
            text-decoration: none;
            font-size: 14px;
        }
        .grid-container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 42px 35px;
        }
        .column-wrap {
            width: 100%;
        }
        .col-head {
            display: flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 18px;
        }
        .orange-bar {
            width: 4px;
            height: 22px;
            background: #ff6333;
        }
        .col-name {
            font-size: 19px;
            color: #222;
        }
        .tag {
            padding: 2px 8px;
            background: #f3f6fb;
            border-radius: 12px;
            font-size: 12px;
            color: #757c8a;
        }
        .list-item {
            list-style: none;
        }
        .list-item li {
            padding: 7px 0;
            border-bottom: 1px dashed #e2e7f1;
        }
        .list-item li:last-child {
            border-bottom: none;
        }
        .list-item a {
            text-decoration: none;
            font-size: 15px;
            color: #454956;
            line-height: 1.6;
            display: block;
        }
        .list-item a::before {
            content: "› ";
            color: #b1b9c8;
            margin-right: 5px;
        }
        .list-item a:hover {
            color: #2876e3;
        }


        /* 底部页脚 */
        footer {
            width: 100%;
            padding: 35px 0;
            border-top: 1px solid #0e0e0e;
            background:#ebebeb;
            margin-top: 40px;
        }
        .footer-inner {
            width:1230px;
            margin:0 auto;
            display:flex;
            justify-content: space-between;
            align-items:center;
            font-size:14px;
            color:#666;
        }
        .footer-link a {
            color:#666;
            text-decoration:none;
            margin:0 10px;
        }
        .footer-link a:hover {
            color:#1967e0;
        }

        /* ===================== 移动端响应式适配 ===================== */
        @media (max-width: 1220px) {
            .container {
                width: 100%;
            }
            .footer-inner {
                width:100%;
                padding:0 20px;
            }
        }
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .service-grid-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
            .two-col-box {
                grid-template-columns: 1fr;
            }
            .grid-container {
                grid-template-columns: 1fr;
            }
            .search-input {
                width: 75%;
            }
            .float-service {
                width: 80px;
                height: 80px;
                right: 15px;
            }
        }