:root{
      --theme:#0B3D91;
      --theme-dark:#06265f;
      --theme-light:#eaf2ff;
      --ink:#10213d;
      --muted:#64748b;
      --line:#dce5f1;
      --surface:#ffffff;
      --soft:#f4f7fb;
      --success:#087f5b;
      --shadow:0 18px 50px rgba(11,61,145,.11);
      --radius:20px;
    }

    *{
      box-sizing:border-box;
    }

    html{
      scroll-behavior:smooth;
    }

    body{
      margin:0;
      color:var(--ink);
      background:#f7f9fc;
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;
      line-height:1.65;
      overflow-x:hidden;
    }

    body.drawer-locked{
      overflow:hidden;
    }

    img{
      display:block;
      max-width:100%;
    }

    a{
      color:inherit;
      text-decoration:none;
    }

    button,
    input,
    select,
    textarea{
      font:inherit;
    }

    button{
      color:inherit;
    }

    .container{
      width:min(1200px,calc(100% - 40px));
      margin:0 auto;
    }

    .topbar{
      position:relative;
      z-index:102;
      color:#dbeafe;
      background:var(--theme-dark);
      font-size:13px;
    }

    .topbar-inner{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }

    .topbar-contact{
      display:flex;
      align-items:center;
      gap:22px;
    }

    .topbar a{
      transition:color .2s ease;
    }

    .topbar a:hover{
      color:#fff;
    }

    .header{
      position:sticky;
      top:0;
      z-index:100;
      border-bottom:1px solid rgba(11,61,145,.1);
      background:rgba(255,255,255,.96);
      box-shadow:0 5px 20px rgba(15,35,70,.05);
      backdrop-filter:blur(16px);
    }

    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:24px;
    }

    .logo{
      min-width:0;
      display:inline-flex;
      align-items:center;
      gap:11px;
      color:var(--theme-dark);
      font-weight:800;
      letter-spacing:.01em;
    }

    .logo img{
      width:42px;
      height:42px;
      flex:0 0 42px;
      object-fit:contain;
      border-radius:10px;
    }

    .logo span{
      max-width:180px;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }

    .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:#263a59;
      font-size:15px;
      font-weight:650;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }

    .nav-link:hover,
    .nav-item:focus-within > .nav-link{
      color:var(--theme);
      background:var(--theme-light);
    }

    .has-arrow::after{
      width:6px;
      height:6px;
      margin-top:-4px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      content:"";
      transform:rotate(45deg);
      transition:transform .2s ease;
    }

    .nav-item:hover .has-arrow::after,
    .nav-item:focus-within .has-arrow::after{
      transform:translateY(3px) rotate(225deg);
    }

    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      z-index:110;
      visibility:hidden;
      opacity:0;
      border:1px solid var(--line);
      background:#fff;
      box-shadow:0 24px 65px rgba(6,38,95,.16);
      transform:translateY(10px);
      transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
    }

    .dropdown-panel::before,
    .mega-menu::before{
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:12px;
      content:"";
    }

    .nav-item:hover > .dropdown-panel,
    .nav-item:hover > .mega-menu,
    .nav-item:focus-within > .dropdown-panel,
    .nav-item:focus-within > .mega-menu{
      visibility:visible;
      opacity:1;
      transform:translateY(0);
    }

    .dropdown-panel{
      left:0;
      width:340px;
      padding:20px;
      border-radius:0 0 16px 16px;
    }

    .dropdown-title{
      margin:0 0 12px;
      color:var(--theme);
      font-size:13px;
      font-weight:800;
    }

    .dropdown-panel article a{
      display:block;
      padding:10px 0;
      overflow:hidden;
      border-bottom:1px solid #edf1f6;
      font-size:14px;
      font-weight:600;
      text-overflow:ellipsis;
      white-space:nowrap;
    }

    .dropdown-panel article a:hover{
      color:var(--theme);
    }

    .dropdown-more{
      display:inline-flex;
      margin-top:15px;
      color:var(--theme);
      font-size:14px;
      font-weight:800;
    }

    .mega-menu{
      left:50%;
      width:min(960px,calc(100vw - 48px));
      padding:24px;
      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-title-row{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      margin-bottom:18px;
      padding-bottom:14px;
      border-bottom:1px solid var(--line);
    }

    .mega-title-row strong{
      color:var(--theme-dark);
      font-size:18px;
    }

    .mega-title-row 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;
      display:grid;
      grid-template-columns:48px minmax(0,1fr);
      align-content:start;
      gap:4px 12px;
      padding:13px;
      border:1px solid #e5ebf3;
      border-radius:14px;
      background:#fff;
      transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
    }

    .mega-card:hover{
      border-color:#aac3eb;
      box-shadow:0 10px 25px rgba(11,61,145,.1);
      transform:translateY(-2px);
    }

    .mega-card img{
      grid-row:1 / span 3;
      width:48px;
      height:48px;
      object-fit:contain;
      border-radius:10px;
      background:#f2f6fc;
    }

    .mega-card strong,
    .mega-card p,
    .mega-meta{
      grid-column:2;
      min-width:0;
    }

    .mega-card strong{
      overflow:hidden;
      color:#162b4b;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }

    .mega-card p{
      display:-webkit-box;
      margin:1px 0 0;
      overflow:hidden;
      color:var(--muted);
      font-size:12px;
      line-height:1.5;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }

    .mega-meta{
      display:flex;
      flex-wrap:wrap;
      gap:3px 9px;
      color:#718096;
      font-size:11px;
    }

    .mega-categories{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:17px;
    }

    .mega-categories a{
      padding:6px 11px;
      border:1px solid #dce6f5;
      border-radius:999px;
      color:#365174;
      background:#f8fbff;
      font-size:12px;
      font-weight:650;
    }

    .mega-categories a:hover{
      color:#fff;
      border-color:var(--theme);
      background:var(--theme);
    }

    .video-card img{
      object-fit:cover;
    }

    .mega-footer{
      display:flex;
      align-items:center;
      justify-content:center;
      margin-top:18px;
      padding:10px;
      border-radius:10px;
      color:var(--theme);
      background:var(--theme-light);
      font-size:14px;
      font-weight:800;
    }

    .mega-footer:hover{
      color:#fff;
      background:var(--theme);
    }

    .header-btns{
      display:flex;
      align-items:center;
      gap:9px;
    }

    .header-account{
      white-space:nowrap;
    }

    .header-open{
      display:inline-flex;
      min-height:40px;
      align-items:center;
      justify-content:center;
      padding:0 17px;
      border-radius:10px;
      color:#fff;
      background:var(--theme);
      font-size:14px;
      font-weight:800;
      box-shadow:0 8px 18px rgba(11,61,145,.2);
    }

    .header-open:hover{
      background:var(--theme-dark);
    }

    .hamburger{
      width:42px;
      height:42px;
      display:none;
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      padding:0;
      border:1px solid var(--line);
      border-radius:10px;
      background:#fff;
      cursor:pointer;
    }

    .hamburger span{
      width:20px;
      height:2px;
      border-radius:2px;
      background:var(--theme-dark);
      transition:transform .2s ease,opacity .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;
      inset:0;
      z-index:198;
      visibility:hidden;
      opacity:0;
      background:rgba(6,25,58,.58);
      transition:opacity .25s ease,visibility .25s ease;
    }

    .drawer-overlay.open{
      visibility:visible;
      opacity:1;
    }

    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      z-index:199;
      width:min(390px,90vw);
      height:100vh;
      overflow-y:auto;
      background:#fff;
      box-shadow:-25px 0 60px rgba(7,31,70,.2);
      transform:translateX(105%);
      transition:transform .28s ease;
    }

    .mobile-drawer.open{
      transform:translateX(0);
    }

    .drawer-head{
      min-height:74px;
      display:flex;
      align-items:center;
      gap:10px;
      padding:14px 18px;
      border-bottom:1px solid var(--line);
      background:#f8fbff;
    }

    .drawer-head > a{
      padding:8px 12px;
      border-radius:8px;
      color:#fff;
      background:var(--theme);
      font-size:14px;
      font-weight:750;
    }

    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      padding:0;
      border:1px solid var(--line);
      border-radius:10px;
      color:var(--theme-dark);
      background:#fff;
      font-size:26px;
      line-height:1;
      cursor:pointer;
    }

    .drawer-menu{
      padding:14px 18px 32px;
    }

    .drawer-link,
    .drawer-toggle{
      width:100%;
      min-height:50px;
      display:flex;
      align-items:center;
      padding:0 5px;
      border:0;
      border-bottom:1px solid #e9eef5;
      background:transparent;
      color:#18304f;
      font-weight:750;
      text-align:left;
      cursor:pointer;
    }

    .drawer-toggle{
      justify-content:space-between;
    }

    .drawer-toggle::after{
      width:8px;
      height:8px;
      margin-right:4px;
      border-right:2px solid var(--theme);
      border-bottom:2px solid var(--theme);
      content:"";
      transform:rotate(45deg);
      transition:transform .2s ease;
    }

    .drawer-toggle.active::after{
      transform:rotate(225deg);
    }

    .drawer-submenu{
      display:none;
      padding:7px 0 10px 15px;
      border-bottom:1px solid #e9eef5;
    }

    .drawer-submenu.open{
      display:block;
    }

    .drawer-submenu a{
      display:block;
      padding:9px 10px;
      border-left:2px solid #dce8f8;
      color:#53677f;
      font-size:14px;
    }

    .drawer-submenu a:hover{
      color:var(--theme);
      border-left-color:var(--theme);
      background:#f4f8fe;
    }

    .tool-detail-page{
      min-height:700px;
    }

    .tool-detail-page .tool-hero{
      position:relative;
      overflow:hidden;
      padding:68px 0 60px;
      color:#fff;
      background:
        radial-gradient(circle at 12% 20%,rgba(84,164,255,.28),transparent 30%),
        radial-gradient(circle at 86% 20%,rgba(80,211,255,.18),transparent 28%),
        linear-gradient(135deg,#061d49 0%,#0B3D91 56%,#075aa6 100%);
    }

    .tool-detail-page .tool-hero::before,
    .tool-detail-page .tool-hero::after{
      position:absolute;
      border:1px solid rgba(255,255,255,.12);
      border-radius:50%;
      content:"";
    }

    .tool-detail-page .tool-hero::before{
      width:440px;
      height:440px;
      right:-190px;
      bottom:-300px;
    }

    .tool-detail-page .tool-hero::after{
      width:260px;
      height:260px;
      right:-70px;
      bottom:-170px;
    }

    .tool-detail-page .breadcrumbs{
      position:relative;
      z-index:1;
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:8px;
      margin-bottom:28px;
      color:#c7dcff;
      font-size:14px;
    }

    .tool-detail-page .breadcrumbs a:hover{
      color:#fff;
    }

    .tool-detail-page .tool-heading{
      position:relative;
      z-index:1;
      max-width:850px;
    }

    .tool-detail-page .tool-heading-icon{
      width:76px;
      height:76px;
      display:grid;
      place-items:center;
      margin-bottom:22px;
      padding:13px;
      border:1px solid rgba(255,255,255,.25);
      border-radius:20px;
      background:rgba(255,255,255,.13);
      box-shadow:0 18px 40px rgba(0,0,0,.16);
      backdrop-filter:blur(10px);
    }

    .tool-detail-page .tool-heading-icon img{
      width:100%;
      height:100%;
      object-fit:contain;
    }

    .tool-detail-page .tool-label{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-bottom:12px;
      color:#d9e9ff;
      font-size:13px;
      font-weight:800;
      letter-spacing:.08em;
    }

    .tool-detail-page .tool-label::before{
      width:22px;
      height:3px;
      border-radius:99px;
      background:#70c8ff;
      content:"";
    }

    .tool-detail-page h1{
      margin:0;
      font-size:clamp(34px,5vw,58px);
      line-height:1.15;
      letter-spacing:-.03em;
    }

    .tool-detail-page .tool-intro{
      max-width:760px;
      margin:19px 0 0;
      color:#dceaff;
      font-size:17px;
      line-height:1.9;
    }

    .tool-detail-page .tool-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:25px;
    }

    .tool-detail-page .tool-meta span{
      display:inline-flex;
      align-items:center;
      min-height:36px;
      padding:6px 12px;
      border:1px solid rgba(255,255,255,.2);
      border-radius:999px;
      color:#e7f1ff;
      background:rgba(255,255,255,.09);
      font-size:13px;
    }

    .tool-detail-page .tool-layout{
      display:grid;
      grid-template-columns:minmax(0,1fr) 320px;
      align-items:start;
      gap:28px;
      padding-top:40px;
      padding-bottom:72px;
    }

    .tool-detail-page .tool-main{
      min-width:0;
    }

    .tool-detail-page .tool-panel,
    .tool-detail-page .tool-content,
    .tool-detail-page .related-tools,
    .tool-detail-page .tool-note{
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:#fff;
      box-shadow:var(--shadow);
    }

    .tool-detail-page .tool-panel{
      margin-bottom:24px;
      padding:26px;
    }

    .tool-detail-page .section-kicker{
      display:block;
      margin-bottom:7px;
      color:var(--theme);
      font-size:12px;
      font-weight:900;
      letter-spacing:.09em;
    }

    .tool-detail-page .tool-panel h2,
    .tool-detail-page .tool-content h2,
    .tool-detail-page .related-tools h2{
      margin:0;
      color:#102b55;
      font-size:24px;
      line-height:1.35;
    }

    .tool-detail-page .tool-panel p{
      margin:12px 0 0;
      color:var(--muted);
    }

    .tool-detail-page .tool-status-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
      margin-top:22px;
    }

    .tool-detail-page .status-item{
      padding:15px;
      border:1px solid #e3ebf7;
      border-radius:14px;
      background:#f8fbff;
    }

    .tool-detail-page .status-item strong{
      display:block;
      margin-bottom:3px;
      color:var(--theme);
      font-size:14px;
    }

    .tool-detail-page .status-item span{
      color:#66788f;
      font-size:13px;
    }

    .tool-detail-page .tool-content{
      min-width:0;
      max-width:100%;
      overflow-x:auto;
      padding:32px;
    }

    .tool-detail-page .tool-content > :first-child{
      margin-top:0;
    }

    .tool-detail-page .tool-content > :last-child{
      margin-bottom:0;
    }

    .tool-detail-page .tool-content h2,
    .tool-detail-page .tool-content h3,
    .tool-detail-page .tool-content h4{
      color:#102b55;
      line-height:1.4;
    }

    .tool-detail-page .tool-content p,
    .tool-detail-page .tool-content li{
      color:#445873;
      line-height:1.9;
    }

    .tool-detail-page .tool-content a{
      color:var(--theme);
      text-decoration:underline;
      text-underline-offset:3px;
    }

    .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:14px;
    }

    .tool-detail-page .tool-content table{
      width:100%;
      border-collapse:collapse;
    }

    .tool-detail-page .tool-content th,
    .tool-detail-page .tool-content td{
      padding:12px;
      border:1px solid var(--line);
      text-align:left;
    }

    .tool-detail-page .tool-content blockquote{
      margin:24px 0;
      padding:18px 20px;
      border-left:4px solid var(--theme);
      border-radius:0 12px 12px 0;
      color:#365174;
      background:var(--theme-light);
    }

    .tool-detail-page .tool-sidebar{
      position:sticky;
      top:104px;
      display:grid;
      gap:22px;
      min-width:0;
    }

    .tool-detail-page .tool-note{
      padding:23px;
      color:#fff;
      background:linear-gradient(145deg,var(--theme),var(--theme-dark));
    }

    .tool-detail-page .tool-note h2{
      margin:0 0 10px;
      font-size:20px;
    }

    .tool-detail-page .tool-note p{
      margin:0 0 18px;
      color:#dceaff;
      font-size:14px;
    }

    .tool-detail-page .tool-note a{
      display:flex;
      min-height:44px;
      align-items:center;
      justify-content:center;
      border-radius:10px;
      color:var(--theme-dark);
      background:#fff;
      font-size:14px;
      font-weight:850;
    }

    .tool-detail-page .related-tools{
      overflow:hidden;
      box-shadow:0 12px 35px rgba(11,61,145,.08);
    }

    .tool-detail-page .related-head{
      padding:20px 21px 15px;
      border-bottom:1px solid var(--line);
    }

    .tool-detail-page .related-head h2{
      font-size:20px;
    }

    .tool-detail-page .related-list{
      padding:8px;
    }

    .tool-detail-page .related-card{
      display:grid;
      grid-template-columns:46px minmax(0,1fr);
      gap:10px 12px;
      padding:13px;
      border-radius:13px;
      transition:background .2s ease,transform .2s ease;
    }

    .tool-detail-page .related-card:hover{
      background:#f2f7ff;
      transform:translateX(2px);
    }

    .tool-detail-page .related-card img{
      grid-row:1 / span 2;
      width:46px;
      height:46px;
      padding:7px;
      object-fit:contain;
      border:1px solid #e2eaf5;
      border-radius:12px;
      background:#fff;
    }

    .tool-detail-page .related-card strong{
      align-self:end;
      overflow:hidden;
      color:#17345f;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }

    .tool-detail-page .related-card p{
      display:-webkit-box;
      align-self:start;
      margin:0;
      overflow:hidden;
      color:var(--muted);
      font-size:12px;
      line-height:1.55;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }

    .footer{
      color:#cbd8ea;
      background:#071a38;
    }

    .footer-main{
      display:grid;
      grid-template-columns:1.45fr 1fr 1fr 1.1fr;
      gap:46px;
      padding-top:56px;
      padding-bottom:42px;
    }

    .footer .logo{
      color:#fff;
    }

    .footer-brand p{
      max-width:390px;
      margin:18px 0 0;
      color:#9fb0c7;
      font-size:14px;
      line-height:1.9;
    }

    .footer h3{
      margin:5px 0 18px;
      color:#fff;
      font-size:16px;
    }

    .footer-links,
    .footer-contact{
      display:flex;
      align-items:flex-start;
      flex-direction:column;
      gap:10px;
      font-size:14px;
    }

    .footer-links a,
    .footer-contact a{
      color:#afbdd0;
      transition:color .2s ease,transform .2s ease;
    }

    .footer-links a:hover,
    .footer-contact a:hover{
      color:#fff;
      transform:translateX(2px);
    }

    .footer-social{
      color:#afbdd0;
      overflow-wrap:anywhere;
    }

    .footer-bottom{
      min-height:66px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      border-top:1px solid rgba(255,255,255,.1);
      color:#8fa1ba;
      font-size:13px;
    }

    @media (max-width:1100px){
      .main-nav{
        display:none;
      }

      .hamburger{
        display:flex;
      }

      .header-btns{
        margin-left:auto;
      }

      .tool-detail-page .tool-layout{
        grid-template-columns:minmax(0,1fr) 290px;
      }

      .footer-main{
        grid-template-columns:1.3fr 1fr 1fr;
      }

      .footer-main > div:last-child{
        grid-column:1 / -1;
      }
    }

    @media (max-width:820px){
      .topbar-inner{
        padding:8px 0;
        align-items:flex-start;
        flex-direction:column;
        gap:3px;
      }

      .topbar-contact{
        flex-wrap:wrap;
        gap:4px 15px;
      }

      .header-inner{
        min-height:68px;
      }

      .header-account{
        display:none;
      }

      .tool-detail-page .tool-hero{
        padding:46px 0 44px;
      }

      .tool-detail-page .tool-layout{
        grid-template-columns:1fr;
        padding-top:26px;
        padding-bottom:50px;
      }

      .tool-detail-page .tool-sidebar{
        position:static;
      }

      .tool-detail-page .tool-status-grid{
        grid-template-columns:1fr;
      }

      .footer-main{
        grid-template-columns:1fr 1fr;
        gap:32px;
      }

      .footer-main > div:last-child{
        grid-column:auto;
      }
    }

    @media (max-width:560px){
      .container{
        width:min(100% - 28px,1200px);
      }

      .logo img{
        width:36px;
        height:36px;
        flex-basis:36px;
      }

      .logo span{
        max-width:135px;
        font-size:14px;
      }

      .header-open{
        min-height:38px;
        padding:0 12px;
      }

      .hamburger{
        width:40px;
        height:40px;
      }

      .tool-detail-page h1{
        font-size:34px;
      }

      .tool-detail-page .tool-intro{
        font-size:15px;
      }

      .tool-detail-page .tool-panel,
      .tool-detail-page .tool-content{
        padding:21px;
        border-radius:16px;
      }

      .tool-detail-page .tool-meta{
        align-items:flex-start;
        flex-direction:column;
      }

      .footer-main{
        grid-template-columns:1fr;
        padding-top:42px;
      }

      .footer-bottom{
        align-items:flex-start;
        justify-content:center;
        flex-direction:column;
        padding:17px 0;
      }
    }