:root{--primary:#0B3D91;--primary-dark:#072b67;--accent:#2f73d9;--ink:#18202c;--muted:#647184;--line:#dce3ed;--surface:#f4f7fb;--white:#fff;--radius:18px;--shadow:0 16px 42px rgba(11,61,145,.12)}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--white);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.65}
    body,button,input{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{background:#061f49;color:#dce9ff;font-size:13px}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .topbar a{margin-left:20px;color:#edf4ff}
    .header{position:relative;z-index:50;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 5px 22px rgba(18,38,68,.06)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:24px}
    .logo{display:flex;align-items:center;gap:10px;min-width:max-content;color:var(--primary);font-size:20px;font-weight:800}
    .logo img{width:42px;height:42px;border-radius:11px;object-fit:contain}
    .main-nav{align-self:stretch;display:flex;align-items:stretch;margin-left:auto}
    .nav-list{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{display:flex;align-items:center;height:100%;padding:0 12px;font-size:15px;font-weight:650;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--primary)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:-4px 0 0 7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:0;visibility:hidden;opacity:0;transform:translateY(8px);transition:.2s ease;pointer-events:none;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:0 22px 50px rgba(12,34,68,.16)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;right:0;bottom:100%;left:0;height:8px}
    .dropdown-panel{width:310px;padding:18px}
    .mega-menu{width:630px;padding:22px}
    .nav-item:nth-last-child(-n+2) .mega-menu{right:0;left:auto}
    .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:none;pointer-events:auto}
    .drop-title,.mega-title{margin:0 0 12px;color:var(--primary);font-size:13px;font-weight:800;letter-spacing:.08em}
    .drop-link{display:block;padding:9px 10px;border-radius:9px;font-size:14px}
    .drop-link:hover{background:var(--surface);color:var(--primary)}
    .drop-link small{display:block;color:var(--muted);font-size:12px}
    .mega-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
    .mega-card{display:flex;align-items:center;gap:11px;min-width:0;padding:11px;border:1px solid #e6ebf2;border-radius:12px}
    .mega-card:hover{border-color:#b7cae8;background:#f6f9ff}
    .mega-card img{width:42px;height:42px;flex:0 0 42px;border-radius:9px;object-fit:contain;background:#f0f4fa}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block}
    .mega-card strong{overflow:hidden;color:#1d2a3d;font-size:14px;text-overflow:ellipsis;white-space:nowrap}
    .mega-card small{margin-top:2px;color:var(--muted);font-size:11px;line-height:1.45}
    .mega-footer{display:block;margin-top:15px;padding-top:13px;border-top:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:750;text-align:right}
    .header-btns{display:flex;align-items:center;gap:8px;margin-left:auto}
    .member-btn,.open-btn{padding:9px 14px;border-radius:9px;font-size:14px;font-weight:700}
    .member-btn{border:1px solid #bbcae0;color:var(--primary)}
    .open-btn{background:var(--primary);color:#fff}
    .hamburger{display:none;width:42px;height:42px;padding:9px;border:0;border-radius:10px;background:#edf3fc;cursor:pointer}
    .hamburger span{display:block;width:22px;height:2px;margin:5px auto;background:var(--primary);transition:.2s}
    .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(4,16,35,.55);transition:.25s}
    .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:-18px 0 50px rgba(0,0,0,.16);transform:translateX(105%);transition:.28s ease}
    .mobile-drawer.open{transform:none}
    .drawer-head{display:flex;align-items:center;gap:12px;min-height:72px;padding:14px 18px;border-bottom:1px solid var(--line)}
    .drawer-head>a{padding:8px 11px;border-radius:8px;background:var(--primary);color:#fff;font-size:13px}
    .drawer-close{margin-left:auto;border:0;background:transparent;color:#344154;font-size:30px;cursor:pointer}
    .drawer-menu{padding:12px 18px 28px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 4px;border:0;border-bottom:1px solid #e9edf3;background:transparent;text-align:left;font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--primary)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:8px 8px 12px;background:#f6f8fb;border-radius:0 0 10px 10px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 6px;color:#536174;font-size:14px}
    .tools-page{min-width:0;background:#f5f7fa}
    .tools-page .tools-intro{position:relative;overflow:hidden;padding:78px 0 70px;background:linear-gradient(145deg,#061f49 0%,#0B3D91 62%,#2868c7 100%);color:#fff;text-align:center}
    .tools-page .tools-intro:before,.tools-page .tools-intro:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.12);border-radius:50%}
    .tools-page .tools-intro:before{width:440px;height:440px;top:-280px;left:-90px}
    .tools-page .tools-intro:after{width:360px;height:360px;right:-120px;bottom:-270px}
    .tools-page .eyebrow{display:inline-flex;padding:6px 13px;border:1px solid rgba(255,255,255,.3);border-radius:999px;background:rgba(255,255,255,.08);font-size:13px;letter-spacing:.1em}
    .tools-page h1{margin:17px auto 14px;font-size:clamp(34px,5vw,58px);line-height:1.15}
    .tools-page .lead{max-width:720px;margin:0 auto;color:#d8e7ff;font-size:17px}
    .tools-page .intro-links{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:27px}
    .tools-page .intro-links a{padding:10px 16px;border-radius:10px;background:#fff;color:var(--primary);font-size:14px;font-weight:750}
    .tools-page .intro-links a:last-child{border:1px solid rgba(255,255,255,.38);background:transparent;color:#fff}
    .tools-page .tool-content{padding:62px 0 76px}
    .tools-page .section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:25px}
    .tools-page .section-heading h2{margin:0;font-size:30px}
    .tools-page .section-heading p{max-width:600px;margin:0;color:var(--muted)}
    .tools-page .tools-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
    .tools-page .tool-card{display:flex;min-width:0;min-height:235px;flex-direction:column;padding:25px;border:1px solid #dfe5ed;border-radius:var(--radius);background:#fff;box-shadow:0 8px 28px rgba(25,46,77,.05);transition:.22s ease}
    .tools-page .tool-card:hover{border-color:#abc1e4;box-shadow:var(--shadow);transform:translateY(-4px)}
    .tools-page .tool-card-top{display:flex;align-items:center;gap:15px}
    .tools-page .tool-icon{display:grid;width:60px;height:60px;flex:0 0 60px;place-items:center;border-radius:15px;background:#edf4ff}
    .tools-page .tool-icon img{width:38px;height:38px;object-fit:contain}
    .tools-page .tool-card h3{min-width:0;margin:0;color:#152237;font-size:20px}
    .tools-page .tool-card p{display:-webkit-box;overflow:hidden;min-height:75px;margin:18px 0;color:var(--muted);font-size:14px;-webkit-box-orient:vertical;-webkit-line-clamp:3}
    .tools-page .tool-action{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:15px;border-top:1px solid #edf0f4;color:var(--primary);font-size:14px;font-weight:750}
    .tools-page .tool-action span:last-child{font-size:18px}
    .tools-page .guide{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:54px}
    .tools-page .guide-card{position:relative;padding:25px 24px;border-radius:16px;background:#eaf1fb}
    .tools-page .guide-number{display:inline-grid;width:36px;height:36px;place-items:center;border-radius:50%;background:var(--primary);color:#fff;font-weight:800}
    .tools-page .guide-card h3{margin:15px 0 8px;font-size:18px}
    .tools-page .guide-card p{margin:0;color:#5b6879;font-size:14px}
    .tools-page .notice{display:flex;align-items:center;justify-content:space-between;gap:28px;margin-top:50px;padding:30px 34px;border:1px solid #cfdaea;border-radius:20px;background:#fff}
    .tools-page .notice h2{margin:0 0 6px;font-size:23px}
    .tools-page .notice p{margin:0;color:var(--muted)}
    .tools-page .notice a{flex:0 0 auto;padding:11px 18px;border-radius:10px;background:var(--primary);color:#fff;font-weight:750}
    .footer{padding:56px 0 20px;background:#071b39;color:#d2dceb}
    .footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1.15fr;gap:38px}
    .footer h3,.footer h4{margin:0 0 15px;color:#fff}
    .footer p{margin:7px 0;color:#aebbd0;font-size:14px}
    .footer a{display:block;margin:8px 0;color:#c8d4e6;font-size:14px}
    .footer a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:25px;margin-top:38px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);color:#92a2b9;font-size:13px}
    @media (max-width:1080px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .tools-page .tools-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:760px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar a{margin:0 14px 0 0}
      .header-inner{min-height:68px}
      .logo span{max-width:125px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
      .member-btn{display:none}
      .open-btn{padding:8px 11px}
      .tools-page .tools-intro{padding:58px 0 53px}
      .tools-page .lead{font-size:15px}
      .tools-page .tool-content{padding:44px 0 58px}
      .tools-page .section-heading{align-items:flex-start;flex-direction:column;gap:8px}
      .tools-page .section-heading h2{font-size:26px}
      .tools-page .tools-grid,.tools-page .guide{grid-template-columns:1fr}
      .tools-page .tool-card{min-height:215px}
      .tools-page .notice{align-items:flex-start;flex-direction:column;padding:25px}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-bottom{align-items:flex-start;flex-direction:column}
    }
    @media (max-width:480px){
      .footer-grid{grid-template-columns:1fr}
      .tools-page .intro-links{align-items:stretch;flex-direction:column}
      .tools-page .intro-links a{text-align:center}
    }