:root{
      --theme:#0B3D91;
      --theme-dark:#072b68;
      --theme-soft:#eaf1fc;
      --accent:#d79a2b;
      --ink:#172033;
      --muted:#647087;
      --line:#dde4ee;
      --surface:#ffffff;
      --background:#f5f7fb;
      --shadow:0 16px 45px rgba(20,35,65,.10);
      --radius:18px;
    }

    *{
      box-sizing:border-box;
    }

    html{
      scroll-behavior:smooth;
    }

    body{
      margin:0;
      color:var(--ink);
      background:var(--background);
      font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;
      line-height:1.7;
    }

    body.drawer-locked{
      overflow:hidden;
    }

    img{
      max-width:100%;
      height:auto;
    }

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

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

    .container{
      width:min(1180px,calc(100% - 40px));
      margin:0 auto;
    }

    .topbar{
      color:#f7f9ff;
      background:var(--theme-dark);
      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:22px;
    }

    .topbar-contact a{
      color:#f7f9ff;
      transition:color .2s ease;
    }

    .topbar-contact a:hover{
      color:#f4c66b;
    }

    .header{
      position:relative;
      z-index:100;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 20px rgba(21,36,65,.05);
    }

    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:28px;
    }

    .logo{
      min-width:0;
      display:inline-flex;
      align-items:center;
      gap:11px;
      color:var(--ink);
      font-size:20px;
      font-weight:800;
      letter-spacing:.01em;
    }

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

    .logo span{
      white-space:nowrap;
    }

    .main-nav{
      flex:1;
      align-self:stretch;
    }

    .nav-list{
      height:100%;
      margin:0;
      padding:0;
      display:flex;
      align-items:stretch;
      justify-content:center;
      list-style:none;
    }

    .nav-item{
      position:relative;
      display:flex;
      align-items:stretch;
    }

    .nav-link{
      position:relative;
      display:flex;
      align-items:center;
      padding:0 13px;
      color:#26324a;
      font-size:14px;
      font-weight:700;
      white-space:nowrap;
      transition:color .2s ease;
    }

    .nav-link::after{
      position:absolute;
      right:13px;
      bottom:15px;
      left:13px;
      height:2px;
      content:"";
      background:var(--theme);
      transform:scaleX(0);
      transition:transform .2s ease;
    }

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

    .nav-item:hover > .nav-link::after,
    .nav-item:focus-within > .nav-link::after{
      transform:scaleX(1);
    }

    .nav-link.has-arrow{
      padding-right:27px;
    }

    .nav-link.has-arrow::before{
      position:absolute;
      top:50%;
      right:11px;
      width:6px;
      height:6px;
      content:"";
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:translateY(-70%) rotate(45deg);
    }

    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      left:50%;
      visibility:hidden;
      opacity:0;
      transform:translate(-50%,10px);
      transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
      pointer-events:none;
    }

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

    .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:translate(-50%,0);
      pointer-events:auto;
    }

    .dropdown-panel{
      width:320px;
      padding:14px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 16px 16px;
      box-shadow:var(--shadow);
    }

    .dropdown-panel > a{
      display:block;
      padding:10px 12px;
      color:#364159;
      border-radius:9px;
      font-size:14px;
    }

    .dropdown-panel > a:hover{
      color:var(--theme);
      background:var(--theme-soft);
    }

    .dropdown-panel .dropdown-all{
      margin-top:8px;
      color:#fff;
      text-align:center;
      background:var(--theme);
    }

    .dropdown-panel .dropdown-all:hover{
      color:#fff;
      background:var(--theme-dark);
    }

    .mega-menu{
      width:min(900px,calc(100vw - 36px));
      padding:22px;
      background:#fff;
      border:1px solid var(--line);
      border-top:3px solid var(--theme);
      border-radius:0 0 18px 18px;
      box-shadow:var(--shadow);
    }

    .mega-menu.mega-wide{
      width:min(1060px,calc(100vw - 36px));
    }

    .nav-item:nth-child(3) .mega-menu{
      left:35%;
    }

    .nav-item:nth-child(4) .mega-menu,
    .nav-item:nth-child(6) .mega-menu{
      left:auto;
      right:-260px;
      transform:translateY(10px);
    }

    .nav-item:nth-child(4):hover > .mega-menu,
    .nav-item:nth-child(4):focus-within > .mega-menu,
    .nav-item:nth-child(6):hover > .mega-menu,
    .nav-item:nth-child(6):focus-within > .mega-menu{
      transform:translateY(0);
    }

    .mega-title{
      margin:0 0 14px;
      color:var(--theme-dark);
      font-size:16px;
      line-height:1.4;
    }

    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:12px;
    }

    .mega-card{
      min-width:0;
      padding:13px;
      display:grid;
      grid-template-columns:42px minmax(0,1fr);
      align-items:center;
      gap:4px 10px;
      background:#f8faff;
      border:1px solid #e8edf5;
      border-radius:12px;
      transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease;
    }

    .mega-card:hover{
      border-color:#a9bee1;
      transform:translateY(-2px);
      box-shadow:0 10px 24px rgba(11,61,145,.10);
    }

    .mega-card img{
      width:42px;
      height:42px;
      grid-row:1 / span 3;
      object-fit:contain;
      border-radius:9px;
      background:#fff;
    }

    .mega-card img.video-thumb,
    .mega-card img.product-thumb{
      object-fit:cover;
    }

    .mega-card strong{
      min-width:0;
      overflow:hidden;
      color:#202b40;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }

    .mega-card p{
      min-width:0;
      margin:0;
      overflow:hidden;
      color:var(--muted);
      font-size:12px;
      line-height:1.5;
      text-overflow:ellipsis;
      white-space:nowrap;
    }

    .mega-meta{
      display:flex;
      flex-wrap:wrap;
      gap:4px 9px;
      color:#7b8598;
      font-size:11px;
    }

    .mega-columns{
      display:grid;
      grid-template-columns:190px minmax(0,1fr);
      gap:22px;
    }

    .mega-categories{
      padding-right:20px;
      border-right:1px solid var(--line);
    }

    .mega-categories > a{
      display:block;
      padding:8px 10px;
      color:#445069;
      border-radius:8px;
      font-size:13px;
    }

    .mega-categories > a:hover{
      color:var(--theme);
      background:var(--theme-soft);
    }

    .mega-footer{
      margin-top:16px;
      padding:11px 14px;
      display:block;
      color:#fff;
      text-align:center;
      background:var(--theme);
      border-radius:10px;
      font-size:13px;
      font-weight:700;
    }

    .mega-footer:hover{
      background:var(--theme-dark);
    }

    .header-btns{
      display:flex;
      align-items:center;
      gap:10px;
      white-space:nowrap;
    }

    .account-btn{
      padding:10px 15px;
      color:#fff;
      background:var(--theme);
      border-radius:9px;
      font-size:14px;
      font-weight:700;
      box-shadow:0 7px 18px rgba(11,61,145,.18);
      transition:background .2s ease,transform .2s ease;
    }

    .account-btn:hover{
      background:var(--theme-dark);
      transform:translateY(-1px);
    }

    .hamburger{
      width:42px;
      height:42px;
      padding:9px;
      display:none;
      border:1px solid var(--line);
      border-radius:10px;
      background:#fff;
      cursor:pointer;
    }

    .hamburger span{
      width:100%;
      height:2px;
      margin:5px 0;
      display:block;
      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;
      z-index:998;
      inset:0;
      visibility:hidden;
      opacity:0;
      background:rgba(5,15,34,.58);
      transition:opacity .25s ease,visibility .25s ease;
    }

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

    .mobile-drawer{
      position:fixed;
      z-index:999;
      top:0;
      right:0;
      bottom:0;
      width:min(390px,88vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 50px rgba(5,18,43,.20);
      transform:translateX(105%);
      transition:transform .25s ease;
    }

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

    .drawer-head{
      min-height:72px;
      padding:14px 18px;
      display:flex;
      align-items:center;
      gap:12px;
      color:#fff;
      background:var(--theme-dark);
    }

    .drawer-head a{
      padding:7px 10px;
      border:1px solid rgba(255,255,255,.3);
      border-radius:8px;
      font-size:14px;
    }

    .drawer-close{
      width:38px;
      height:38px;
      margin-left:auto;
      color:#fff;
      background:transparent;
      border:0;
      font-size:30px;
      line-height:1;
      cursor:pointer;
    }

    .drawer-menu{
      padding:14px 18px 30px;
    }

    .drawer-link,
    .drawer-toggle{
      width:100%;
      min-height:48px;
      padding:11px 4px;
      display:flex;
      align-items:center;
      color:#28354d;
      background:transparent;
      border:0;
      border-bottom:1px solid var(--line);
      text-align:left;
      font-weight:700;
      cursor:pointer;
    }

    .drawer-toggle{
      position:relative;
    }

    .drawer-toggle::after{
      position:absolute;
      right:5px;
      width:8px;
      height:8px;
      content:"";
      border-right:2px solid var(--theme);
      border-bottom:2px solid var(--theme);
      transform:rotate(45deg);
      transition:transform .2s ease;
    }

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

    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      background:#f7f9fd;
      transition:max-height .3s ease;
    }

    .drawer-submenu.open{
      max-height:900px;
    }

    .drawer-submenu a{
      padding:9px 14px;
      display:block;
      color:#556078;
      border-bottom:1px solid #e9edf4;
      font-size:13px;
    }

    .drawer-submenu a:hover{
      color:var(--theme);
      background:var(--theme-soft);
    }

    .tool-detail-page{
      min-height:650px;
      padding-bottom:76px;
    }

    .tool-detail-page .tool-hero{
      position:relative;
      overflow:hidden;
      padding:58px 0 50px;
      color:#fff;
      background:
        radial-gradient(circle at 15% 20%,rgba(216,161,57,.25),transparent 30%),
        radial-gradient(circle at 85% 80%,rgba(78,130,213,.35),transparent 32%),
        linear-gradient(135deg,var(--theme-dark),var(--theme));
    }

    .tool-detail-page .tool-hero::before{
      position:absolute;
      inset:0;
      content:"";
      opacity:.18;
      background-image:
        linear-gradient(rgba(255,255,255,.12) 1px,transparent 1px),
        linear-gradient(90deg,rgba(255,255,255,.12) 1px,transparent 1px);
      background-size:36px 36px;
      mask-image:linear-gradient(to bottom,#000,transparent);
    }

    .tool-detail-page .tool-hero-inner{
      position:relative;
      z-index:1;
    }

    .tool-detail-page .breadcrumbs{
      margin-bottom:22px;
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:8px;
      color:rgba(255,255,255,.78);
      font-size:13px;
    }

    .tool-detail-page .breadcrumbs a:hover{
      color:#f8cc72;
    }

    .tool-detail-page .tool-heading{
      max-width:820px;
      margin:0 auto;
      text-align:center;
    }

    .tool-detail-page .tool-icon-shell{
      width:78px;
      height:78px;
      margin:0 auto 20px;
      display:grid;
      place-items:center;
      overflow:hidden;
      background:#fff;
      border:1px solid rgba(255,255,255,.5);
      border-radius:22px;
      box-shadow:0 16px 35px rgba(2,13,35,.22);
    }

    .tool-detail-page .tool-icon-shell img{
      width:52px;
      height:52px;
      object-fit:contain;
    }

    .tool-detail-page .eyebrow{
      margin:0 0 8px;
      color:#f6ca71;
      font-size:13px;
      font-weight:800;
      letter-spacing:.16em;
    }

    .tool-detail-page h1{
      margin:0;
      font-size:clamp(32px,5vw,54px);
      line-height:1.2;
      letter-spacing:-.025em;
    }

    .tool-detail-page .tool-summary{
      max-width:720px;
      margin:18px auto 0;
      color:rgba(255,255,255,.84);
      font-size:17px;
      line-height:1.85;
    }

    .tool-detail-page .tool-meta{
      margin-top:23px;
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:9px;
    }

    .tool-detail-page .tool-meta span{
      padding:7px 12px;
      color:#f7f9ff;
      background:rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.18);
      border-radius:999px;
      font-size:13px;
      backdrop-filter:blur(8px);
    }

    .tool-detail-page .detail-layout{
      margin-top:36px;
      display:grid;
      grid-template-columns:minmax(0,1fr) 320px;
      align-items:start;
      gap:28px;
    }

    .tool-detail-page .tool-content-card,
    .tool-detail-page .related-panel,
    .tool-detail-page .notice-card{
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 10px 35px rgba(23,38,68,.07);
    }

    .tool-detail-page .tool-content-card{
      min-width:0;
      padding:34px;
    }

    .tool-detail-page .content-heading{
      margin:0 0 24px;
      padding-bottom:15px;
      color:var(--theme-dark);
      border-bottom:1px solid var(--line);
      font-size:24px;
      line-height:1.35;
    }

    .tool-detail-page .tool-body{
      min-width:0;
      max-width:100%;
      overflow-x:auto;
      color:#344057;
      font-size:16px;
      line-height:1.9;
    }

    .tool-detail-page .tool-body img,
    .tool-detail-page .tool-body video,
    .tool-detail-page .tool-body iframe,
    .tool-detail-page .tool-body table{
      max-width:100%;
    }

    .tool-detail-page .tool-body img{
      height:auto;
      border-radius:12px;
    }

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

    .tool-detail-page .tool-body th,
    .tool-detail-page .tool-body td{
      padding:11px;
      border:1px solid var(--line);
    }

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

    .tool-detail-page .tool-body pre{
      max-width:100%;
      padding:18px;
      overflow-x:auto;
      color:#e9f3ff;
      background:#13213a;
      border-radius:12px;
    }

    .tool-detail-page .tool-body blockquote{
      margin:24px 0;
      padding:16px 20px;
      color:#43516b;
      background:var(--theme-soft);
      border-left:4px solid var(--theme);
      border-radius:0 10px 10px 0;
    }

    .tool-detail-page .content-foot{
      margin-top:28px;
      padding-top:20px;
      display:flex;
      flex-wrap:wrap;
      justify-content:space-between;
      gap:10px;
      color:var(--muted);
      border-top:1px solid var(--line);
      font-size:13px;
    }

    .tool-detail-page .detail-sidebar{
      display:grid;
      gap:20px;
    }

    .tool-detail-page .related-panel{
      padding:22px;
    }

    .tool-detail-page .related-panel h2,
    .tool-detail-page .notice-card h2{
      margin:0 0 16px;
      color:var(--theme-dark);
      font-size:19px;
    }

    .tool-detail-page .related-list{
      display:grid;
      gap:11px;
    }

    .tool-detail-page .related-tool{
      min-width:0;
      padding:12px;
      display:grid;
      grid-template-columns:46px minmax(0,1fr);
      gap:3px 11px;
      align-items:center;
      background:#f8faff;
      border:1px solid #e8edf5;
      border-radius:12px;
      transition:border-color .2s ease,transform .2s ease;
    }

    .tool-detail-page .related-tool:hover{
      border-color:#aabfe2;
      transform:translateY(-2px);
    }

    .tool-detail-page .related-tool img{
      width:46px;
      height:46px;
      grid-row:1 / span 2;
      object-fit:contain;
      background:#fff;
      border-radius:10px;
    }

    .tool-detail-page .related-tool strong{
      min-width:0;
      overflow:hidden;
      color:#253047;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }

    .tool-detail-page .related-tool span{
      display:-webkit-box;
      overflow:hidden;
      color:var(--muted);
      font-size:12px;
      line-height:1.55;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }

    .tool-detail-page .all-tools{
      margin-top:16px;
      padding:11px 14px;
      display:block;
      color:#fff;
      text-align:center;
      background:var(--theme);
      border-radius:10px;
      font-size:14px;
      font-weight:700;
    }

    .tool-detail-page .all-tools:hover{
      background:var(--theme-dark);
    }

    .tool-detail-page .notice-card{
      padding:22px;
      color:#5a6478;
      font-size:14px;
    }

    .tool-detail-page .notice-card p{
      margin:0;
    }

    .footer{
      color:#cbd5e5;
      background:#09162b;
    }

    .footer-main{
      padding:58px 0 40px;
      display:grid;
      grid-template-columns:1.4fr 1fr 1fr 1fr;
      gap:42px;
    }

    .footer .logo{
      color:#fff;
    }

    .footer-brand p,
    .footer-contact p{
      margin:15px 0 0;
      color:#aebbd0;
      font-size:14px;
      line-height:1.8;
    }

    .footer h3{
      margin:4px 0 18px;
      color:#fff;
      font-size:16px;
    }

    .footer-links{
      display:grid;
      gap:10px;
    }

    .footer-links a,
    .footer-contact a{
      color:#b8c5d8;
      font-size:14px;
      transition:color .2s ease;
    }

    .footer-links a:hover,
    .footer-contact a:hover{
      color:#f1bd5b;
    }

    .footer-bottom{
      min-height:70px;
      padding:18px 0;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:25px;
      color:#8f9db3;
      border-top:1px solid rgba(255,255,255,.10);
      font-size:13px;
    }

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

      .header-inner{
        justify-content:space-between;
      }

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

      .hamburger{
        display:block;
      }

      .tool-detail-page .detail-layout{
        grid-template-columns:minmax(0,1fr) 285px;
      }

      .footer-main{
        grid-template-columns:repeat(2,minmax(0,1fr));
      }
    }

    @media (max-width:800px){
      .topbar-inner{
        min-height:46px;
      }

      .topbar-welcome{
        display:none;
      }

      .topbar-contact{
        width:100%;
        justify-content:space-between;
        gap:12px;
      }

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

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

      .header-btns > .account-btn{
        display:none;
      }

      .tool-detail-page .tool-hero{
        padding:42px 0 40px;
      }

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

      .tool-detail-page .detail-sidebar{
        grid-template-columns:repeat(2,minmax(0,1fr));
      }
    }

    @media (max-width:600px){
      .container{
        width:min(100% - 28px,1180px);
      }

      .topbar-contact{
        align-items:flex-start;
        flex-direction:column;
        gap:1px;
        padding:5px 0;
      }

      .topbar-contact a{
        line-height:1.55;
      }

      .header .logo{
        font-size:17px;
      }

      .header .logo img{
        width:38px;
        height:38px;
        flex-basis:38px;
      }

      .tool-detail-page{
        padding-bottom:50px;
      }

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

      .tool-detail-page .tool-content-card{
        padding:23px 18px;
      }

      .tool-detail-page .content-heading{
        font-size:21px;
      }

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

      .tool-detail-page .content-foot{
        flex-direction:column;
      }

      .footer-main{
        padding:44px 0 32px;
        grid-template-columns:1fr;
        gap:28px;
      }

      .footer-bottom{
        align-items:flex-start;
        flex-direction:column;
        gap:7px;
      }
    }