:root{--blue:#0B3D91;--ink:#172235;--muted:#657184;--line:#dfe5ec;--paper:#f6f8fb;--white:#fff}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);font:15px/1.7 Arial,"Microsoft YaHei",sans-serif}
    a{color:inherit;text-decoration:none}
    .container{width:min(1180px,92%);margin:auto}
    .topbar{background:#10233f;color:#dce7f6;font-size:13px}
    .topbar .container{min-height:36px;display:flex;justify-content:space-between;align-items:center;gap:20px}
    .topbar a{margin-left:20px;color:#dce7f6}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:76px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--blue);white-space:nowrap}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:5px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:block;padding:25px 13px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--blue)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8793a4}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%);width:300px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 12px 12px;box-shadow:0 18px 40px #14233a18;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
    .mega-menu{width:570px}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,.nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{opacity:1;visibility:visible;pointer-events:auto}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .drop-title,.mega-title{margin:0 0 12px;color:var(--blue);font-weight:800}
    .drop-link{display:block;padding:7px 0;border-bottom:1px solid #edf0f4}
    .drop-link small{display:block;color:var(--muted);font-size:12px}
    .mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
    .mega-card{display:flex;gap:9px;padding:9px;border:1px solid #edf0f4;border-radius:8px}
    .mega-card:hover,.drop-link:hover{color:var(--blue);background:#f5f8fd}
    .mega-card img{width:32px;height:32px;object-fit:contain}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block}
    .mega-card small{font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-footer{display:block;margin-top:15px;padding-top:12px;border-top:1px solid var(--line);color:var(--blue);font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px}
    .member-btn,.open-btn{padding:8px 13px;border-radius:6px;font-weight:700}
    .member-btn{color:var(--blue);border:1px solid #cbd8ed}
    .open-btn{background:var(--blue);color:#fff}
    .hamburger{display:none;border:0;background:none;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:24px;height:2px;margin:5px 0;background:var(--ink);transition:.2s}
    .mobile-drawer{position:fixed;z-index:50;top:0;right:-360px;width:min(360px,88%);height:100vh;background:#fff;overflow:auto;transition:right .25s;box-shadow:-12px 0 35px #1115}
    .mobile-drawer.open{right:0}
    .drawer-overlay{position:fixed;z-index:45;inset:0;background:#09142699;opacity:0;visibility:hidden;transition:.2s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .drawer-head{display:flex;align-items:center;gap:16px;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head>a{margin-left:auto;color:var(--blue)}
    .drawer-close{border:0;background:none;font-size:28px;cursor:pointer;color:var(--muted)}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf0f4;background:none;text-align:left;font:inherit;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--blue)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:4px 14px;background:#f7f9fc}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted)}
    .tag-index-page{padding:70px 0 90px;min-height:520px}
    .tag-index-page .page-heading{text-align:center;max-width:720px;margin:0 auto 38px}
    .tag-index-page h1{margin:0 0 10px;font-size:clamp(30px,5vw,48px);letter-spacing:.02em}
    .tag-index-page .lead{margin:0;color:var(--muted)}
    .tag-cloud{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:14px;max-width:980px;margin:0 auto;padding:38px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 16px 45px #17345d0d}
    .tag-cloud a{display:inline-flex;align-items:center;gap:7px;padding:10px 17px;border:1px solid #d4deec;border-radius:999px;color:var(--blue);background:#f8fbff;transition:.2s}
    .tag-cloud a:nth-child(3n){font-size:18px}
    .tag-cloud a:nth-child(4n){font-size:13px;color:#52657c}
    .tag-cloud a:hover{background:var(--blue);border-color:var(--blue);color:#fff;transform:translateY(-3px)}
    .tag-cloud small{font-size:11px;color:inherit;opacity:.7}
    .tag-index-note{margin:25px auto 0;text-align:center;color:var(--muted)}
    .footer{background:#10233f;color:#c9d5e5;padding:48px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:35px}
    .footer h3,.footer h4{margin:0 0 14px;color:#fff}
    .footer p{margin:6px 0}
    .footer a{display:block;margin:6px 0;color:#c9d5e5}
    .footer a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:35px;padding-top:18px;border-top:1px solid #ffffff22;font-size:12px;color:#9fb0c7}
    @media(max-width:900px){
      .main-nav{display:none}.hamburger{display:block}.header-inner{height:66px}.member-btn{display:none}
      .footer-grid{grid-template-columns:1fr 1fr}.mega-menu{width:90vw}
    }
    @media(max-width:600px){
      .topbar .container{display:block;padding:7px 0}.topbar a{margin:0 14px 0 0}
      .open-btn{display:none}.tag-index-page{padding:45px 0 65px}.tag-cloud{padding:24px 15px;gap:9px}
      .tag-cloud a{padding:8px 12px}.footer-grid{grid-template-columns:1fr}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}
    }