:root{
      --primary:#0B3D91;
      --primary-dark:#072d6d;
      --primary-soft:#eaf1fc;
      --accent:#2f74df;
      --ink:#172033;
      --muted:#667085;
      --line:#dfe5ee;
      --surface:#ffffff;
      --surface-soft:#f5f7fb;
      --success:#16845b;
      --shadow:0 16px 42px rgba(12,35,76,.12);
      --radius:18px;
    }

    *{
      box-sizing:border-box;
    }

    html{
      scroll-behavior:smooth;
    }

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

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

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

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

    button{
      color:inherit;
    }

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

    .topbar{
      color:#dbe7fb;
      background:#06265e;
      font-size:13px;
    }

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

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

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

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

    .header{
      position:relative;
      z-index:60;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 18px rgba(14,39,78,.05);
    }

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

    .logo{
      min-width:190px;
      display:flex;
      align-items:center;
      gap:11px;
      color:var(--primary);
      font-size:19px;
      font-weight:800;
      white-space:nowrap;
    }

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

    .main-nav{
      flex:1;
      min-width:0;
      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:center;
    }

    .nav-link{
      height:100%;
      padding:0 13px;
      display:flex;
      align-items:center;
      gap:6px;
      color:#26334a;
      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(--primary);
      background:var(--primary-soft);
    }

    .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:transform .2s ease;
    }

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

    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      left:50%;
      z-index:70;
      visibility:hidden;
      opacity:0;
      transform:translate(-50%,10px);
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 17px 17px;
      box-shadow:var(--shadow);
      pointer-events:none;
      transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
    }

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

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

    .dropdown-panel{
      width:320px;
      padding:20px;
    }

    .mega-menu{
      width:min(820px,calc(100vw - 36px));
      padding:22px;
    }

    .nav-item:nth-last-child(-n+3) .mega-menu{
      left:auto;
      right:0;
      transform:translateY(10px);
    }

    .nav-item:nth-last-child(-n+3):hover > .mega-menu,
    .nav-item:nth-last-child(-n+3):focus-within > .mega-menu{
      transform:translateY(0);
    }

    .panel-title{
      margin:0 0 12px;
      color:var(--primary);
      font-size:14px;
      font-weight:800;
      letter-spacing:.04em;
    }

    .panel-list{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:8px;
    }

    .dropdown-panel .panel-list{
      grid-template-columns:1fr;
    }

    .panel-list a{
      min-width:0;
      padding:9px 11px;
      overflow:hidden;
      color:#33415a;
      background:#f7f9fc;
      border-radius:9px;
      text-overflow:ellipsis;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }

    .panel-list a:hover{
      color:var(--primary);
      background:var(--primary-soft);
    }

    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:11px;
    }

    .mega-card{
      min-width:0;
      min-height:84px;
      padding:11px;
      display:flex;
      align-items:flex-start;
      gap:11px;
      background:#f8fafc;
      border:1px solid #edf1f6;
      border-radius:12px;
      transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
    }

    .mega-card:hover{
      transform:translateY(-2px);
      border-color:#b9ccef;
      box-shadow:0 8px 20px rgba(11,61,145,.09);
    }

    .mega-card img{
      width:46px;
      height:46px;
      flex:0 0 46px;
      object-fit:contain;
      background:#fff;
      border:1px solid #e4e9f1;
      border-radius:10px;
    }

    .mega-card span{
      min-width:0;
      display:block;
    }

    .mega-card strong,
    .mega-card small{
      display:block;
      overflow:hidden;
      text-overflow:ellipsis;
    }

    .mega-card strong{
      margin-bottom:3px;
      color:#1f2c43;
      font-size:14px;
      white-space:nowrap;
    }

    .mega-card small{
      color:var(--muted);
      font-size:12px;
      line-height:1.45;
      white-space:nowrap;
    }

    .mega-footer{
      margin-top:16px;
      padding:11px 14px;
      display:block;
      color:#fff;
      background:var(--primary);
      border-radius:10px;
      text-align:center;
      font-size:14px;
      font-weight:700;
      transition:background .2s ease;
    }

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

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

    .member-link,
    .open-link{
      padding:9px 14px;
      border-radius:9px;
      font-size:14px;
      font-weight:700;
      transition:all .2s ease;
    }

    .member-link{
      color:var(--primary);
      border:1px solid #b8c9e8;
    }

    .member-link:hover{
      background:var(--primary-soft);
    }

    .open-link{
      color:#fff;
      background:var(--primary);
      border:1px solid var(--primary);
    }

    .open-link:hover{
      background:var(--primary-dark);
    }

    .hamburger{
      width:43px;
      height:43px;
      padding:0;
      display:none;
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:10px;
      cursor:pointer;
    }

    .hamburger span{
      width:20px;
      height:2px;
      display:block;
      background:var(--primary);
      border-radius:2px;
      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:90;
      visibility:hidden;
      opacity:0;
      background:rgba(4,17,40,.56);
      backdrop-filter:blur(3px);
      transition:opacity .25s ease,visibility .25s ease;
    }

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

    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      z-index:100;
      width:min(390px,88vw);
      overflow-y:auto;
      background:#fff;
      box-shadow:-18px 0 50px rgba(4,24,60,.2);
      transform:translateX(105%);
      transition:transform .28s ease;
    }

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

    .drawer-head{
      min-height:72px;
      padding:13px 16px;
      display:flex;
      align-items:center;
      gap:10px;
      color:#fff;
      background:var(--primary);
    }

    .drawer-head > span{
      flex:1;
      font-weight:700;
    }

    .drawer-head > a{
      padding:7px 12px;
      color:var(--primary);
      background:#fff;
      border-radius:8px;
      font-weight:700;
    }

    .drawer-close{
      width:38px;
      height:38px;
      padding:0;
      color:#fff;
      background:transparent;
      border:1px solid rgba(255,255,255,.45);
      border-radius:9px;
      font-size:27px;
      line-height:1;
      cursor:pointer;
    }

    .drawer-menu{
      padding:14px 16px 28px;
    }

    .drawer-link,
    .drawer-toggle{
      width:100%;
      min-height:48px;
      padding:11px 8px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      color:#24324a;
      background:transparent;
      border:0;
      border-bottom:1px solid #e9edf3;
      text-align:left;
      font-weight:700;
      cursor:pointer;
    }

    .drawer-toggle::after{
      content:"+";
      color:var(--primary);
      font-size:21px;
      font-weight:400;
    }

    .drawer-toggle.active::after{
      content:"−";
    }

    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      background:#f7f9fc;
      transition:max-height .3s ease;
    }

    .drawer-submenu.open{
      max-height:680px;
    }

    .drawer-submenu a{
      padding:10px 16px;
      display:block;
      color:#526078;
      border-bottom:1px solid #e8edf4;
      font-size:14px;
    }

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

    .tool-detail-page{
      min-width:0;
      background:
        radial-gradient(circle at 90% 4%,rgba(47,116,223,.12),transparent 24rem),
        linear-gradient(180deg,#f6f9fe 0,#fff 520px);
    }

    .tool-detail-page .tool-breadcrumb{
      padding:22px 0 0;
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:8px;
      color:var(--muted);
      font-size:14px;
    }

    .tool-detail-page .tool-breadcrumb a{
      color:var(--primary);
      font-weight:650;
    }

    .tool-detail-page .tool-breadcrumb span[aria-hidden="true"]{
      color:#9ba6b7;
    }

    .tool-detail-page .tool-heading{
      margin-top:18px;
      padding:34px;
      position:relative;
      overflow:hidden;
      display:flex;
      align-items:center;
      gap:24px;
      color:#fff;
      background:linear-gradient(135deg,#082e70 0%,#0B3D91 58%,#2468c8 100%);
      border-radius:24px;
      box-shadow:0 20px 46px rgba(11,61,145,.2);
    }

    .tool-detail-page .tool-heading::before,
    .tool-detail-page .tool-heading::after{
      content:"";
      position:absolute;
      border:1px solid rgba(255,255,255,.17);
      border-radius:50%;
    }

    .tool-detail-page .tool-heading::before{
      width:250px;
      height:250px;
      top:-160px;
      right:5%;
    }

    .tool-detail-page .tool-heading::after{
      width:140px;
      height:140px;
      right:-45px;
      bottom:-75px;
    }

    .tool-detail-page .tool-icon-wrap{
      width:92px;
      height:92px;
      padding:16px;
      position:relative;
      z-index:1;
      flex:0 0 92px;
      display:flex;
      align-items:center;
      justify-content:center;
      background:#fff;
      border-radius:22px;
      box-shadow:0 14px 30px rgba(3,22,56,.22);
    }

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

    .tool-detail-page .tool-heading-copy{
      position:relative;
      z-index:1;
      min-width:0;
    }

    .tool-detail-page .tool-kicker{
      margin:0 0 4px;
      color:#cfe0ff;
      font-size:13px;
      font-weight:800;
      letter-spacing:.12em;
    }

    .tool-detail-page .tool-heading h1{
      margin:0;
      font-size:clamp(28px,4vw,46px);
      line-height:1.2;
      overflow-wrap:anywhere;
    }

    .tool-detail-page .tool-intro{
      max-width:830px;
      margin:12px 0 0;
      color:#edf4ff;
      font-size:16px;
    }

    .tool-detail-page .tool-meta{
      margin-top:16px;
      display:flex;
      flex-wrap:wrap;
      gap:9px;
    }

    .tool-detail-page .tool-meta span{
      padding:6px 11px;
      color:#edf4ff;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.2);
      border-radius:999px;
      font-size:13px;
    }

    .tool-detail-page .tool-layout{
      padding:34px 0 70px;
      display:grid;
      grid-template-columns:minmax(0,1fr) 320px;
      align-items:start;
      gap:28px;
    }

    .tool-detail-page .tool-main-card,
    .tool-detail-page .related-panel,
    .tool-detail-page .notice-panel{
      min-width:0;
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 12px 32px rgba(16,42,82,.07);
    }

    .tool-detail-page .tool-main-card{
      overflow:hidden;
    }

    .tool-detail-page .content-heading{
      padding:23px 28px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      border-bottom:1px solid var(--line);
    }

    .tool-detail-page .content-heading h2{
      margin:0;
      color:#19263d;
      font-size:22px;
    }

    .tool-detail-page .content-heading span{
      color:var(--success);
      font-size:13px;
      font-weight:700;
    }

    .tool-detail-page .tool-content{
      min-width:0;
      max-width:100%;
      padding:28px;
      overflow-x:auto;
      color:#303c52;
      font-size:16px;
    }

    .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:#152745;
      line-height:1.35;
    }

    .tool-detail-page .tool-content a{
      color:var(--primary);
      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{
      max-width:100%;
      height:auto;
      border-radius:12px;
    }

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

    .tool-detail-page .tool-content th,
    .tool-detail-page .tool-content td{
      padding:10px 12px;
      border:1px solid var(--line);
      text-align:left;
    }

    .tool-detail-page .tool-content pre,
    .tool-detail-page .tool-content code{
      max-width:100%;
      white-space:pre-wrap;
      overflow-wrap:anywhere;
    }

    .tool-detail-page .tool-sidebar{
      min-width:0;
      display:grid;
      gap:20px;
    }

    .tool-detail-page .related-panel,
    .tool-detail-page .notice-panel{
      padding:21px;
    }

    .tool-detail-page .sidebar-title{
      margin:0 0 15px;
      padding-bottom:12px;
      color:#172842;
      border-bottom:2px solid var(--primary-soft);
      font-size:19px;
    }

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

    .tool-detail-page .related-tool{
      min-width:0;
      padding:12px;
      display:flex;
      align-items:flex-start;
      gap:12px;
      background:#f8fafc;
      border:1px solid #edf1f6;
      border-radius:12px;
      transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
    }

    .tool-detail-page .related-tool:hover{
      transform:translateY(-2px);
      border-color:#b9ccef;
      box-shadow:0 8px 18px rgba(11,61,145,.08);
    }

    .tool-detail-page .related-tool img{
      width:44px;
      height:44px;
      flex:0 0 44px;
      object-fit:contain;
      background:#fff;
      border:1px solid #e2e8f0;
      border-radius:10px;
    }

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

    .tool-detail-page .related-tool strong{
      display:block;
      overflow:hidden;
      color:#1c2a42;
      font-size:14px;
      text-overflow:ellipsis;
      white-space:nowrap;
    }

    .tool-detail-page .related-tool small{
      margin-top:3px;
      display:-webkit-box;
      overflow:hidden;
      color:var(--muted);
      font-size:12px;
      line-height:1.5;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }

    .tool-detail-page .notice-panel{
      color:#42516a;
      background:linear-gradient(145deg,#fff,#f4f8ff);
    }

    .tool-detail-page .notice-panel p{
      margin:0 0 16px;
      font-size:14px;
    }

    .tool-detail-page .tools-entry{
      padding:10px 14px;
      display:block;
      color:#fff;
      background:var(--primary);
      border-radius:9px;
      text-align:center;
      font-weight:750;
      transition:background .2s ease;
    }

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

    .footer{
      color:#d8e3f5;
      background:#071c3e;
    }

    .footer .container{
      padding-top:52px;
      padding-bottom:22px;
    }

    .footer-grid{
      display:grid;
      grid-template-columns:1.45fr 1fr 1fr 1.15fr;
      gap:38px;
    }

    .footer-brand{
      margin-bottom:13px;
      color:#fff;
      font-size:22px;
      font-weight:850;
    }

    .footer p{
      margin:8px 0;
      color:#aebbd0;
      font-size:14px;
    }

    .footer h3{
      margin:0 0 15px;
      color:#fff;
      font-size:16px;
    }

    .footer-links{
      display:grid;
      gap:8px;
    }

    .footer-links a,
    .footer-links span{
      color:#b8c5d9;
      font-size:14px;
      overflow-wrap:anywhere;
    }

    .footer-links a:hover{
      color:#fff;
    }

    .footer-bottom{
      margin-top:38px;
      padding-top:20px;
      display:flex;
      justify-content:space-between;
      gap:20px;
      color:#93a3bc;
      border-top:1px solid rgba(255,255,255,.12);
      font-size:13px;
    }

    @media (max-width:1120px){
      .main-nav{
        display:none;
      }

      .hamburger{
        display:flex;
      }

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

      .logo{
        min-width:0;
      }
    }

    @media (max-width:900px){
      .tool-detail-page .tool-layout{
        grid-template-columns:1fr;
      }

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

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

    @media (max-width:680px){
      .container{
        width:min(100% - 28px,1180px);
      }

      .topbar .container{
        padding:8px 0;
        align-items:flex-start;
        flex-direction:column;
        gap:2px;
      }

      .topbar-links{
        align-items:flex-start;
        flex-direction:column;
        gap:2px;
      }

      .header-inner{
        min-height:68px;
        gap:12px;
      }

      .logo{
        max-width:53vw;
        font-size:16px;
      }

      .logo img{
        width:37px;
        height:37px;
      }

      .member-link{
        display:none;
      }

      .open-link{
        padding:8px 11px;
      }

      .tool-detail-page .tool-breadcrumb{
        padding-top:15px;
      }

      .tool-detail-page .tool-heading{
        padding:26px 20px;
        align-items:flex-start;
        flex-direction:column;
        gap:18px;
        border-radius:18px;
      }

      .tool-detail-page .tool-icon-wrap{
        width:76px;
        height:76px;
        flex-basis:76px;
        border-radius:17px;
      }

      .tool-detail-page .tool-heading h1{
        font-size:29px;
      }

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

      .tool-detail-page .tool-layout{
        padding:24px 0 48px;
        gap:18px;
      }

      .tool-detail-page .content-heading{
        padding:18px 19px;
        align-items:flex-start;
        flex-direction:column;
        gap:6px;
      }

      .tool-detail-page .tool-content{
        padding:20px 18px;
      }

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

      .footer-grid{
        grid-template-columns:1fr;
        gap:27px;
      }

      .footer .container{
        padding-top:40px;
      }

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