* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: "Segoe UI", "Roboto", "Helvetica Neue", Helvetica, Arial, "Microsoft YaHei", sans-serif;
            background: #eef2f7;
            color: #1f2f2a;
            line-height: 1.45;
            padding: 24px 20px;
        }
        
        .container {
            max-width: 1400px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 32px;
            box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.08);
            overflow: hidden;
            padding: 32px 28px 18px;
            transition: all 0.2s;
            position: relative;
        }
		
       .header {
            text-align: center;
            border-bottom: 2px solid #dce5ef;
            margin-bottom: 36px;
            padding-bottom: 22px;
            position: relative;       }
        .header h1 {
            font-size: 2rem;
            font-weight: 600;
            color: #1e6f9f;
            letter-spacing: -0.3px;
            margin-bottom: 10px;
            word-break: break-word;
        }
		.imgh1{width: 8rem;height: auto;vertical-align: middle;margin-top: -5px;}
        .header .sub {
            color: #4f6f8a;
            font-size: 1rem;
            background: #f0f5fb;
            display: inline-block;
            padding: 5px 18px;
            border-radius: 40px;
        }
        
       .mobile-home-btn, .mobile-close-btn {
            position: absolute;
            top: 16px;
            width: 44px;
            height: 44px;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(2px);
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0,0,0,0.05);
            display: none;         
            align-items: center;
            justify-content: center;
            text-decoration: none;
            font-size: 1.6rem;
            font-weight: 500;
            color: #1e6f9f;
            border: 1px solid #d9e4f0;
            transition: all 0.2s ease;
            cursor: pointer;
            z-index: 20;
            line-height: 1;
            font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
        }
        .mobile-home-btn:hover, .mobile-close-btn:hover {
            background: #ffffff;
            transform: scale(0.96);
            box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
        }
        .mobile-home-btn:active, .mobile-close-btn:active {
            transform: scale(0.94);
            background: #f0f7fe;
        }
        .mobile-home-btn {
            left: 16px;
        }
        .mobile-close-btn {
            right: 16px;
            font-size: 1.8rem;
            font-weight: 400;
            padding-bottom: 2px;
        }
        @media (max-width: 768px) {
            .mobile-home-btn, .mobile-close-btn {
                display: flex;   
            }
            .header {
                padding-top: 56px;padding-left: 8px;
                padding-right: 8px;
            }
            .header h1 {
                font-size: 1.6rem;
                margin-top: 20px;
                padding: 0 8px;
            }
            .header .sub {
                font-size: 0.8rem;
                padding: 4px 14px;
            }
            .container {
                padding: 0px 16px 16px;
            }
        }
       
        @media (max-width: 480px) {
            .header h1 {
                font-size: 1.4rem;
            }
            .mobile-home-btn, .mobile-close-btn {
                width: 40px;
                height: 40px;
                top: 12px;
                font-size: 1.4rem;
            }
            .mobile-close-btn {
                font-size: 1.6rem;
            }
            .header {
                padding-top: 52px;
            }
        }

        .highlight-tools {
            background: #f0f7fe;
            border-radius: 60px;
            margin-bottom: 36px;
            padding: 12px 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 16px;
            border: 1px solid #d9e4f0;
        }
        .tool-item {
            background: white;
            border-radius: 40px;
            padding: 6px 20px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.2s;
            box-shadow: 0 1px 3px rgba(0,0,0,0.03);
        }
        .tool-item a {
            text-decoration: none;
            color: #2c6f8f;
        }
        .tool-item a:hover {
            color: #0c4e73;
        }
        @media (max-width: 640px) {
            .highlight-tools {
                border-radius: 28px;
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }
        }

       .sitemap-grid {
            margin: 0 -14px;
            overflow: hidden; 
        }
        .category {
            float: left;
            width: 33.333%;
            padding: 0 14px 32px;
        }
        
        @media (max-width: 900px) {
            .category {
                width: 50%;
            }
        }
        @media (max-width: 600px) {
            .category {
                width: 100%;
                float: none;
            }
        }

        /* 卡片样式 (统一设计，整齐美观) */
        .cat-card {
            background: #eef2f7;
            border-radius: 28px;
            border: 1px solid #e3ecf3;
            overflow: hidden;
            transition: all 0.25s ease;
            height: 100%;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02);
        }
        .cat-card:hover {
            border-color: #bfdaa8;
            box-shadow: 0 14px 28px -10px rgba(30, 80, 110, 0.12);
            background: #ffffff;
        }
        .cat-title {
            background: #f2f8ff;
            padding: 16px 20px;
            font-size: 1.28rem;
            font-weight: 600;
            color: #1f6390;
            border-left: 6px solid #4895c7;
            letter-spacing: -0.2px;
        }
        .link-list {
            padding: 16px 12px 20px 22px;
            list-style: none;
        }
        .link-list li {
            margin-bottom: 14px;
            line-height: 1.4;
            break-inside: avoid;
            page-break-inside: avoid;
        }
        .link-list a {
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            color: #2c5e6b;
            display: inline-block;
            transition: color 0.2s, transform 0.1s;
            border-bottom: 1px dotted transparent;
        }
        .link-list a:hover {
            color: #3282b0;
            border-bottom-color: #88bce6;
        }
        .link-desc {
            display: block;
            font-size: 0.73rem;
            color: #7b92a3;
            margin-top: 4px;
            line-height: 1.35;
        }

        /* 底部 */
        .footer-note {
            text-align: center;
            font-size: 0.8rem;
            border-top: 1px solid #e2ebd6;
            padding-top: 28px;
            color: #658098;
        }
        .footer-note a {
            color: #2c7fb8;
            text-decoration: none;
            margin: 0 8px;
        }
        .footer-note a:hover {
            text-decoration: underline;
        }
        .clearfix:after {
            content: ".";
            display: block;
            height: 0;
            clear: both;
            visibility: hidden;
        }
        .clearfix {
            zoom: 1;
        }

        @supports (display: grid) {
            .sitemap-grid {
                display: grid;
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
                gap: 28px;
                margin: 0;
            }
            .category {
                float: none;
                width: auto;
                padding: 0;
            }
           
            @media (min-width: 1280px) {
                .sitemap-grid {
                    grid-template-columns: repeat(4, 1fr);
                }
            }
            
            @media (min-width: 860px) and (max-width: 1279px) {
                .sitemap-grid {
                    grid-template-columns: repeat(3, 1fr);
                }
            }
            
            @media (min-width: 600px) and (max-width: 859px) {
                .sitemap-grid {
                    grid-template-columns: repeat(2, 1fr);
                }
            }
            
            @media (max-width: 599px) {
                .sitemap-grid {
                    grid-template-columns: 1fr;
                }
            }
          
            .cat-card {
                height: 100%;
                display: flex;
                flex-direction: column;
            }
            .link-list {
                flex: 1;
            }
        }

        @media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
           
            .sitemap-grid {
                display: block;
            }
        }
        .cat-card {
            transition-property: border-color, box-shadow;
        }
        hr {
            display: none;
        }
        
        .mobile-home-btn, .mobile-close-btn {
            -webkit-tap-highlight-color: transparent;
        }
        /* ===== 移动端顶部浮窗导航 ===== */
@media(min-width:769px){
  .wk-art-top, .wk-art-top.is-sticky, .wk-art-top-placeholder, .wk-art-mask {display: none !important;position: static !important;}
}
@media(max-width:768px){
  /* 移除 body 内边距，让浮窗贴边 */
  body { padding: 0; }
  .container {
    margin: 12px;
    border-radius: 24px;
  }
  /* 隐藏本页原有的移动端头部按钮，避免重复 */
  .mobile-home-btn, .mobile-close-btn, .m-noplay { display: none !important; }
  .header { padding-top: 20px !important; }

  .wk-art-top {position: relative;background: #edf8fa;border-bottom: 1px solid #c5d8ea;z-index: 900;transition: background 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;}
  .wk-art-top.is-sticky {position: fixed;top: -1px;left: 0;right: 0;padding-top: 1px;background:#f8f8f8;border-bottom: 1px solid #e5eaf1;box-shadow: 0 2px 10px rgba(15,23,42,0.08);}
  .wk-art-top-placeholder { display: none; }
  .wk-art-top-placeholder.show { display: block; }
  .wk-art-top-inner {height: 45px;padding: 0 10px;display: flex;align-items: center;justify-content: space-between;box-sizing: border-box;}
  .wk-art-top-inner * { box-sizing: border-box; }
  .wk-art-top-logo {display: inline-flex;align-items: center;text-decoration: none;height: 100%;}
  .wk-art-top-logo img {display: block;height: 34px;width: auto;border: 0;filter: brightness(1.15) opacity(0.9);}
  .wk-art-top-toggle {display: block;width: 40px;height: 40px;border: 0;background: transparent;cursor: pointer;padding: 0;position: relative;-webkit-tap-highlight-color: transparent;flex-shrink: 0;}
  .wk-art-top-toggle span {position: absolute;left: 8px;right: 8px;height: 3px;background: #5a8bbd;border-radius: 3px;transition: transform 0.2s, opacity 0.2s, top 0.2s;}
  .wk-art-top-toggle span:nth-child(1) { top: 11px; }
  .wk-art-top-toggle span:nth-child(2) { top: 18px; }
  .wk-art-top-toggle span:nth-child(3) { top: 25px; }
  .wk-art-top-toggle.open span:nth-child(1) { top: 18px; transform: rotate(45deg); }
  .wk-art-top-toggle.open span:nth-child(2) { opacity: 0; }
  .wk-art-top-toggle.open span:nth-child(3) { top: 18px; transform: rotate(-45deg); }
  .wk-art-menu {position: absolute;left: 0;right: 0;top: 100%;background: #fff;border-bottom: 1px solid #c5d8ea;box-shadow: 0 8px 20px rgba(15,23,42,0.10);max-height: 0;overflow: hidden;transition: max-height 0.28s ease;}
  .wk-art-menu.open {max-height: 80vh;overflow-y: auto;-webkit-overflow-scrolling: touch;}
  .wk-art-menu-grid {display: grid;grid-template-columns: 1fr 1fr;padding: 12px 10px 16px;gap: 2px 8px;background: #f5f9fc;}
  .wk-art-menu-grid a {display: block;padding: 10px 8px;font-size: 14px;color: #334155;text-decoration: none;border-radius: 6px;text-align: center;white-space: nowrap;overflow: hidden;text-overflow: ellipsis;transition: background 0.15s, color 0.15s;}
  .wk-art-menu-grid a:active,.wk-art-menu-grid a:hover {background: #eff6ff;color: #2563eb;}
  .wk-art-mask {position: fixed;left: 0; right: 0; top: 0; bottom: 0;background: rgba(15,23,42,0.4);z-index: 899;opacity: 0;visibility: hidden;transition: opacity 0.25s, visibility 0.25s;}
  .wk-art-mask.show {opacity: 1;visibility: visible;}
}

/* 返回顶部 */
.wkm-backtop {
    position: fixed;
    right: 25px;
    bottom: 50px;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: #4a90d99e;
    color: #fff;
    border: 0;
    cursor: pointer;
    box-shadow: 0 4px 12px rgb(74 144 217 / 40%);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.25s, visibility 0.25s, transform 0.25s, background 0.15s;
    z-index: 800;
    font-size: 20px;
    line-height: 1;
    padding: 0;
}
.wkm-backtop.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.wkm-backtop:hover { background: #4a90d99e; }