:root{
      --theme:#0B3D91;
      --theme-dark:#072c6c;
      --theme-light:#eaf1fc;
      --accent:#d41474;
      --text:#172033;
      --muted:#667085;
      --line:#e4e9f1;
      --surface:#ffffff;
      --background:#f5f7fb;
      --shadow:0 16px 45px rgba(11,61,145,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:var(--background);
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;
      line-height:1.65;
    }
    body.drawer-locked{overflow:hidden}
    img{max-width:100%;display:block}
    a{color:inherit;text-decoration:none}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{
      color:#dce7fa;
      background:#071b3e;
      font-size:13px;
    }
    .topbar-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
    }
    .topbar-contact{display:flex;align-items:center;gap:20px}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:50;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 6px 20px rgba(15,23,42,.04);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:24px;
    }
    .logo{
      flex:0 0 auto;
      display:inline-flex;
      align-items:center;
      gap:10px;
      color:var(--theme);
      font-size:20px;
      font-weight:800;
      letter-spacing:.02em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .main-nav{align-self:stretch;margin-left:auto}
    .nav-list{
      height:100%;
      display:flex;
      align-items:stretch;
      gap:2px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .nav-item{position:relative;display:flex;align-items:center}
    .nav-link{
      height:100%;
      display:flex;
      align-items:center;
      gap:6px;
      padding:0 13px;
      color:#27334a;
      font-size:15px;
      font-weight:600;
      white-space:nowrap;
    }
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--theme)}
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin-top:-4px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg);
      transition:.2s ease;
    }
    .nav-item:hover .has-arrow::after,
    .nav-item:focus-within .has-arrow::after{transform:rotate(225deg);margin-top:4px}
    .nav-item::after{
      content:"";
      position:absolute;
      top:100%;
      left:0;
      width:100%;
      height:14px;
      pointer-events:none;
    }
    .nav-item:hover::after,.nav-item:focus-within::after{pointer-events:auto}

    .dropdown-panel,.mega-menu{
      position:absolute;
      top:100%;
      visibility:hidden;
      opacity:0;
      transform:translateY(10px);
      pointer-events:none;
      transition:opacity .18s ease,transform .18s ease,visibility .18s;
      background:#fff;
      border:1px solid var(--line);
      box-shadow:0 24px 70px rgba(13,33,70,.16);
    }
    .nav-item:hover>.dropdown-panel,
    .nav-item:focus-within>.dropdown-panel,
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.mega-menu{
      visibility:visible;
      opacity:1;
      transform:translateY(0);
      pointer-events:auto;
    }
    .dropdown-panel{
      left:0;
      width:310px;
      padding:18px;
      border-radius:0 0 16px 16px;
    }
    .dropdown-title{
      display:block;
      margin-bottom:10px;
      color:var(--theme);
      font-size:13px;
      font-weight:800;
    }
    .dropdown-panel>a:not(.dropdown-main){
      display:block;
      padding:9px 0;
      overflow:hidden;
      color:#344054;
      border-bottom:1px solid #eef1f5;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .dropdown-panel>a:hover{color:var(--theme)}
    .dropdown-main{
      display:flex;
      align-items:center;
      justify-content:space-between;
      margin-top:12px;
      padding:10px 12px;
      color:#fff;
      background:var(--theme);
      border-radius:9px;
      font-weight:700;
    }
    .mega-menu{
      left:50%;
      width:min(960px,calc(100vw - 40px));
      padding:22px;
      border-radius:0 0 20px 20px;
      transform:translate(-50%,10px);
    }
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.mega-menu{transform:translate(-50%,0)}
    .mega-head{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:16px;
      padding-bottom:13px;
      border-bottom:1px solid var(--line);
    }
    .mega-head strong{color:var(--theme);font-size:18px}
    .mega-head span{color:var(--muted);font-size:13px}
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
    }
    .mega-card{
      min-width:0;
      padding:13px;
      background:#f8faff;
      border:1px solid #e7edf7;
      border-radius:12px;
      transition:.2s ease;
    }
    .mega-card:hover{
      color:var(--theme);
      background:#fff;
      border-color:#b8cae8;
      transform:translateY(-2px);
      box-shadow:0 10px 22px rgba(11,61,145,.09);
    }
    .mega-card-top{display:flex;align-items:center;gap:10px}
    .mega-card-top img{
      width:42px;
      height:42px;
      flex:0 0 auto;
      object-fit:contain;
      background:#fff;
      border:1px solid #edf0f4;
      border-radius:9px;
    }
    .mega-card strong{
      display:block;
      overflow:hidden;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card p{
      display:-webkit-box;
      margin:8px 0 0;
      overflow:hidden;
      color:var(--muted);
      font-size:12px;
      line-height:1.55;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .mega-rating{display:block;color:#c26c00;font-size:12px}
    .mega-meta{
      display:flex;
      flex-wrap:wrap;
      gap:5px 10px;
      margin-top:9px;
      color:var(--muted);
      font-size:11px;
    }
    .mega-categories{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:15px;
    }
    .mega-categories a{
      padding:6px 11px;
      color:var(--theme);
      background:var(--theme-light);
      border-radius:999px;
      font-size:12px;
      font-weight:700;
    }
    .mega-video-card{display:flex;gap:11px}
    .mega-video-card>img{
      width:92px;
      height:66px;
      flex:0 0 auto;
      object-fit:cover;
      border-radius:8px;
    }
    .mega-video-copy{min-width:0}
    .mega-video-duration{color:var(--accent);font-size:11px;font-weight:700}
    .mega-footer{
      display:flex;
      justify-content:center;
      margin-top:16px;
      padding:10px;
      color:var(--theme);
      background:var(--theme-light);
      border-radius:10px;
      font-weight:800;
    }
    .header-btns{display:flex;align-items:center;gap:9px}
    .member-entry{white-space:nowrap}
    .member-entry a,.account-entry{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:38px;
      padding:0 14px;
      border-radius:9px;
      font-size:14px;
      font-weight:700;
    }
    .member-entry a{
      color:var(--theme);
      border:1px solid #b6c8e6;
      background:#fff;
    }
    .account-entry{color:#fff;background:var(--theme)}
    .account-entry:hover{background:var(--theme-dark)}
    .hamburger{
      width:42px;
      height:42px;
      display:none;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:5px;
      padding:0;
      background:#fff;
      border:1px solid var(--line);
      border-radius:9px;
    }
    .hamburger span{
      width:19px;
      height:2px;
      background:var(--theme);
      transition:.2s ease;
    }
    .hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

    .drawer-overlay{
      position:fixed;
      z-index:90;
      inset:0;
      visibility:hidden;
      opacity:0;
      background:rgba(4,14,34,.58);
      transition:.25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      z-index:100;
      top:0;
      right:0;
      width:min(390px,90vw);
      height:100vh;
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 50px rgba(0,0,0,.18);
      transform:translateX(105%);
      transition:transform .25s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:72px;
      display:flex;
      align-items:center;
      gap:10px;
      padding:14px 18px;
      border-bottom:1px solid var(--line);
    }
    .drawer-head>a,.drawer-head>span,.drawer-head>div a{
      display:inline-flex;
      min-height:36px;
      align-items:center;
      padding:0 12px;
      color:#fff;
      background:var(--theme);
      border-radius:8px;
      font-size:13px;
      font-weight:700;
    }
    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      color:#334155;
      background:#f2f5f9;
      border:0;
      border-radius:50%;
      font-size:25px;
      line-height:1;
    }
    .drawer-menu{padding:12px 18px 30px}
    .drawer-link,.drawer-toggle{
      width:100%;
      min-height:48px;
      display:flex;
      align-items:center;
      color:#25324a;
      background:transparent;
      border:0;
      border-bottom:1px solid #edf0f5;
      font-weight:700;
      text-align:left;
    }
    .drawer-toggle{justify-content:space-between;padding:0}
    .drawer-toggle::after{
      content:"+";
      color:var(--theme);
      font-size:20px;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      display:none;
      padding:8px 0 10px 13px;
      border-bottom:1px solid #edf0f5;
    }
    .drawer-submenu.open{display:block}
    .drawer-submenu a{
      display:block;
      padding:8px 10px;
      color:var(--muted);
      font-size:14px;
      border-left:2px solid #dbe5f4;
    }
    .drawer-submenu a:hover{color:var(--theme);border-left-color:var(--theme)}

    .tool-detail-page{padding:34px 0 80px}
    .tool-detail-page .breadcrumb{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:8px;
      margin-bottom:22px;
      color:var(--muted);
      font-size:14px;
    }
    .tool-detail-page .breadcrumb a:hover{color:var(--theme)}
    .tool-detail-page .tool-hero{
      position:relative;
      overflow:hidden;
      padding:42px;
      color:#fff;
      background:
        radial-gradient(circle at 85% 20%,rgba(212,20,116,.34),transparent 27%),
        linear-gradient(135deg,#071b3e 0%,#0B3D91 62%,#174eaa 100%);
      border-radius:26px;
      box-shadow:var(--shadow);
    }
    .tool-detail-page .tool-hero::after{
      content:"";
      position:absolute;
      right:-90px;
      bottom:-130px;
      width:360px;
      height:360px;
      border:1px solid rgba(255,255,255,.18);
      border-radius:50%;
      box-shadow:0 0 0 45px rgba(255,255,255,.04),0 0 0 90px rgba(255,255,255,.03);
    }
    .tool-detail-page .tool-kicker{
      position:relative;
      z-index:1;
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:6px 12px;
      color:#fff;
      background:rgba(255,255,255,.13);
      border:1px solid rgba(255,255,255,.24);
      border-radius:999px;
      font-size:13px;
      font-weight:700;
    }
    .tool-detail-page .tool-title-row{
      position:relative;
      z-index:1;
      display:flex;
      align-items:center;
      gap:22px;
      margin-top:22px;
    }
    .tool-detail-page .tool-icon{
      width:86px;
      height:86px;
      flex:0 0 auto;
      display:grid;
      place-items:center;
      padding:14px;
      background:#fff;
      border-radius:22px;
      box-shadow:0 12px 30px rgba(0,0,0,.16);
    }
    .tool-detail-page .tool-icon img{width:100%;height:100%;object-fit:contain}
    .tool-detail-page .tool-title-copy{min-width:0}
    .tool-detail-page h1{
      margin:0;
      color:#fff;
      font-size:clamp(30px,4vw,50px);
      line-height:1.15;
      letter-spacing:-.03em;
    }
    .tool-detail-page .tool-summary{
      max-width:820px;
      margin:14px 0 0;
      color:#dce8fa;
      font-size:17px;
    }
    .tool-detail-page .tool-meta{
      position:relative;
      z-index:1;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:25px;
    }
    .tool-detail-page .tool-meta span{
      padding:7px 11px;
      color:#eaf2ff;
      background:rgba(3,17,45,.27);
      border-radius:8px;
      font-size:13px;
    }
    .tool-detail-page .detail-grid{
      display:grid;
      grid-template-columns:minmax(0,1fr) 320px;
      align-items:start;
      gap:26px;
      margin-top:28px;
    }
    .tool-detail-page .tool-article,
    .tool-detail-page .related-panel,
    .tool-detail-page .notice-card{
      background:#fff;
      border:1px solid var(--line);
      border-radius:20px;
      box-shadow:0 10px 35px rgba(11,61,145,.06);
    }
    .tool-detail-page .tool-article{
      min-width:0;
      max-width:100%;
      padding:34px;
      overflow-x:auto;
    }
    .tool-detail-page .section-heading{
      display:flex;
      align-items:center;
      gap:11px;
      margin:0 0 24px;
      color:#15233d;
      font-size:24px;
      line-height:1.3;
    }
    .tool-detail-page .section-heading::before{
      content:"";
      width:5px;
      height:26px;
      flex:0 0 auto;
      background:var(--accent);
      border-radius:5px;
    }
    .tool-detail-page .tool-content{
      min-width:0;
      max-width:100%;
      overflow-x:auto;
      color:#344054;
      font-size:16px;
      line-height:1.9;
    }
    .tool-detail-page .tool-content img,
    .tool-detail-page .tool-content video,
    .tool-detail-page .tool-content iframe,
    .tool-detail-page .tool-content table{
      max-width:100%;
    }
    .tool-detail-page .tool-content img{height:auto;border-radius:12px}
    .tool-detail-page .tool-content table{
      width:100%;
      border-collapse:collapse;
    }
    .tool-detail-page .tool-content th,
    .tool-detail-page .tool-content td{
      padding:10px;
      border:1px solid var(--line);
    }
    .tool-detail-page .tool-content a{color:var(--theme);text-decoration:underline}
    .tool-detail-page .tool-content h2,
    .tool-detail-page .tool-content h3{color:#17233b;line-height:1.4}
    .tool-detail-page .tool-content blockquote{
      margin:22px 0;
      padding:16px 20px;
      color:#384967;
      background:var(--theme-light);
      border-left:4px solid var(--theme);
      border-radius:0 10px 10px 0;
    }
    .tool-detail-page .tool-notice{
      display:flex;
      gap:12px;
      margin-top:28px;
      padding:17px 18px;
      color:#5e4a16;
      background:#fff8df;
      border:1px solid #f2df9e;
      border-radius:12px;
      font-size:14px;
    }
    .tool-detail-page .tool-notice strong{flex:0 0 auto}
    .tool-detail-page .sidebar{
      position:sticky;
      top:22px;
      display:grid;
      gap:18px;
    }
    .tool-detail-page .related-panel{padding:22px}
    .tool-detail-page .related-panel h2,
    .tool-detail-page .notice-card h2{
      margin:0 0 15px;
      font-size:19px;
    }
    .tool-detail-page .related-list{display:grid;gap:10px}
    .tool-detail-page .related-tool{
      display:grid;
      grid-template-columns:48px minmax(0,1fr);
      gap:11px;
      padding:12px;
      background:#f7f9fd;
      border:1px solid transparent;
      border-radius:12px;
      transition:.2s ease;
    }
    .tool-detail-page .related-tool:hover{
      background:#fff;
      border-color:#b9cbe7;
      transform:translateY(-2px);
    }
    .tool-detail-page .related-tool img{
      width:48px;
      height:48px;
      object-fit:contain;
      padding:7px;
      background:#fff;
      border:1px solid #e8edf4;
      border-radius:10px;
    }
    .tool-detail-page .related-tool-copy{min-width:0}
    .tool-detail-page .related-tool strong{
      display:block;
      overflow:hidden;
      color:#1d2a42;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .tool-detail-page .related-tool p{
      display:-webkit-box;
      margin:4px 0 0;
      overflow:hidden;
      color:var(--muted);
      font-size:12px;
      line-height:1.5;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .tool-detail-page .notice-card{padding:22px}
    .tool-detail-page .notice-card p{margin:0;color:var(--muted);font-size:14px}
    .tool-detail-page .notice-card a{
      display:flex;
      align-items:center;
      justify-content:center;
      margin-top:16px;
      min-height:42px;
      color:#fff;
      background:var(--theme);
      border-radius:10px;
      font-weight:700;
    }

    .footer{
      color:#cbd5e1;
      background:#07162f;
    }
    .footer-main{
      display:grid;
      grid-template-columns:1.5fr 1fr 1fr 1.2fr;
      gap:42px;
      padding-top:58px;
      padding-bottom:42px;
    }
    .footer .logo{color:#fff}
    .footer-brand p{
      max-width:440px;
      margin:18px 0;
      color:#9fb0c8;
      font-size:14px;
    }
    .footer h2{
      margin:4px 0 17px;
      color:#fff;
      font-size:16px;
    }
    .footer-links,.footer-contact{display:grid;gap:9px}
    .footer-links a,.footer-contact span{
      color:#aebcd0;
      font-size:14px;
    }
    .footer a:hover{color:#fff}
    .footer-social{display:flex;flex-wrap:wrap;gap:12px}
    .footer-social a{
      padding:7px 10px;
      color:#dbe7f8;
      background:rgba(255,255,255,.07);
      border-radius:7px;
      font-size:13px;
    }
    .footer-bottom{
      min-height:66px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      color:#8495ad;
      border-top:1px solid rgba(255,255,255,.1);
      font-size:13px;
    }
    .footer-bottom-links{display:flex;gap:18px}

    @media (max-width:1120px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-btns{margin-left:auto}
      .footer-main{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:820px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-welcome{display:none}
      .topbar-inner{justify-content:center}
      .tool-detail-page{padding-top:22px}
      .tool-detail-page .tool-hero{padding:30px 24px}
      .tool-detail-page .tool-title-row{align-items:flex-start}
      .tool-detail-page .detail-grid{grid-template-columns:1fr}
      .tool-detail-page .sidebar{position:static}
    }
    @media (max-width:620px){
      .topbar-contact{width:100%;justify-content:space-between;gap:8px}
      .topbar-contact a{font-size:11px}
      .header-inner{min-height:68px;gap:10px}
      .logo img{width:36px;height:36px}
      .logo span{font-size:17px}
      .member-entry{display:none}
      .account-entry{min-height:36px;padding:0 11px}
      .tool-detail-page .tool-hero{padding:25px 19px;border-radius:18px}
      .tool-detail-page .tool-title-row{display:block}
      .tool-detail-page .tool-icon{width:70px;height:70px;margin-bottom:18px}
      .tool-detail-page .tool-summary{font-size:15px}
      .tool-detail-page .tool-article{padding:22px 18px}
      .tool-detail-page .section-heading{font-size:21px}
      .footer-main{grid-template-columns:1fr;gap:28px;padding-top:42px}
      .footer-bottom{
        align-items:flex-start;
        flex-direction:column;
        justify-content:center;
        padding:18px 0;
      }
    }