:root{
      --theme:#0B3D91;
      --theme-deep:#082b66;
      --ink:#15233d;
      --muted:#68758c;
      --line:#dfe6f0;
      --soft:#f4f7fb;
      --white:#fff;
      --shadow:0 18px 50px rgba(20,48,93,.10);
      --radius:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:#f7f9fc;color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}

    .topbar{background:#071c42;color:#c9d8ef;font-size:13px}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .topbar a{color:#dbe7f7;margin-left:18px}
    .topbar a:hover{color:#fff}

    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;color:var(--theme);font-size:20px;font-weight:800;white-space:nowrap}
    .logo img{width:38px;height:38px;object-fit:contain;border-radius:9px}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:3px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;min-height:78px;padding:0 14px;color:#263650;font-size:15px;font-weight:600;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:0 0 4px 8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);visibility:hidden;opacity:0;pointer-events:none;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);transition:.2s ease;z-index:30}
    .dropdown-panel{width:250px;padding:12px;border-radius:0 0 14px 14px}
    .dropdown-panel a{display:block;padding:9px 11px;border-radius:8px;font-size:14px}
    .dropdown-panel a:hover{background:var(--soft);color:var(--theme)}
    .mega-menu{width:650px;padding:20px;border-radius:0 0 18px 18px}
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu,.nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel{visibility:visible;opacity:1;pointer-events:auto}
    .mega-menu:before,.dropdown-panel:before{content:"";position:absolute;left:0;right:0;top:-14px;height:14px}
    .mega-title{font-size:13px;font-weight:800;color:var(--theme);margin:0 0 12px;padding-bottom:8px;border-bottom:1px solid var(--line)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:17px}
    .mega-card{display:block;padding:11px;border:1px solid #e7ecf4;border-radius:11px;background:#fff}
    .mega-card:hover{border-color:#aac0e3;background:#f8fbff}
    .mega-card img{width:34px;height:34px;object-fit:contain;margin-bottom:7px;border-radius:7px}
    .mega-card strong{display:block;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.5;margin-top:3px}
    .mega-footer{display:block;text-align:center;border-radius:9px;background:var(--theme);color:#fff;padding:9px;font-size:13px}
    .mega-footer:hover{background:var(--theme-deep)}
    .header-btns{display:flex;align-items:center;gap:9px;white-space:nowrap}
    .member-btn{color:var(--theme);font-size:13px;font-weight:700}
    .open-btn{background:var(--theme);color:#fff;border-radius:8px;padding:9px 14px;font-size:13px;font-weight:700}
    .open-btn:hover{background:var(--theme-deep)}
    .hamburger{display:none;width:42px;height:40px;padding:8px;border:1px solid var(--line);background:#fff;border-radius:8px;cursor:pointer}
    .hamburger span{display:block;width:22px;height:2px;margin:4px auto;background:var(--theme);transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

    .drawer-overlay{display:none;position:fixed;inset:0;background:rgba(4,19,45,.52);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(390px,88vw);height:100vh;overflow:auto;background:#fff;transform:translateX(100%);transition:transform .25s ease;z-index:50;box-shadow:-12px 0 40px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);font-weight:800;color:var(--theme)}
    .drawer-head>a{margin-left:auto;background:var(--theme);color:#fff;padding:6px 12px;border-radius:7px;font-size:13px}
    .drawer-close{border:0;background:transparent;color:#75829a;font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding:12px 20px 35px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;text-align:left;border:0;border-bottom:1px solid #edf0f5;background:transparent;color:var(--ink);font-weight:700;cursor:pointer}
    .drawer-group{border-bottom:1px solid #edf0f5}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px;font-weight:400}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 10px 13px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}

    .tag-index-page{padding:58px 0 78px}
    .tag-index-page .page-heading{text-align:center;margin:0 auto 36px;max-width:760px}
    .tag-index-page .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.12em}
    .tag-index-page .eyebrow:before{content:"";width:26px;height:2px;background:var(--theme)}
    .tag-index-page h1{margin:12px 0 10px;color:#102a55;font-size:clamp(30px,4vw,48px);line-height:1.2}
    .tag-index-page .intro{margin:0;color:var(--muted);font-size:16px}
    .tag-index-page .tag-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:var(--shadow)}
    .tag-index-page .panel-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:23px;padding-bottom:18px;border-bottom:1px solid var(--line)}
    .tag-index-page .panel-head h2{margin:0;color:#173665;font-size:22px}
    .tag-index-page .panel-head p{margin:0;color:var(--muted);font-size:13px}
    .tag-index-page .tag-cloud{display:flex;flex-wrap:wrap;align-items:center;gap:13px 15px}
    .tag-index-page .tag-item{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border:1px solid #d8e2f1;border-radius:999px;background:#f9fbff;color:#254978;transition:.2s ease}
    .tag-index-page .tag-item:hover{color:#fff;background:var(--theme);border-color:var(--theme);transform:translateY(-2px)}
    .tag-index-page .tag-count{font-size:11px;color:#8190a8}
    .tag-index-page .tag-item:hover .tag-count{color:#dce9ff}
    .tag-index-page .tag-note{display:flex;align-items:center;gap:12px;margin-top:28px;padding:15px 17px;border-radius:12px;background:#f3f7fd;color:#586a84;font-size:13px}
    .tag-index-page .tag-note strong{color:var(--theme)}

    .footer{background:#071c42;color:#c9d6e9;padding:52px 0 0}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:38px;padding-bottom:42px}
    .footer-brand>strong{display:block;margin-bottom:12px;color:#fff;font-size:21px}
    .footer p{margin:7px 0;color:#aebed5;font-size:13px}
    .footer h3{margin:0 0 13px;color:#fff;font-size:15px}
    .footer-grid>div:not(.footer-brand) a{display:block;width:max-content;max-width:100%;padding:3px 0;color:#aebed5;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{padding:19px 0;border-top:1px solid rgba(255,255,255,.12);color:#8fa3c0;font-size:12px}

    @media(max-width:1080px){
      .header-inner{gap:15px}
      .logo{min-width:160px}
      .nav-link{padding:0 9px}
      .mega-menu{width:580px}
    }
    @media(max-width:800px){
      .container{width:min(100% - 30px,620px)}
      .topbar .container{min-height:46px;align-items:flex-start;justify-content:center;flex-direction:column;gap:0;padding:7px 0}
      .topbar a{margin-left:12px}
      .main-nav{display:none}
      .header-inner{min-height:67px}
      .header-btns{margin-left:auto}
      .member-btn,.open-btn{display:none}
      .hamburger{display:block}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
      .tag-index-page{padding:40px 0 55px}
      .tag-index-page .tag-panel{padding:22px 18px}
      .tag-index-page .panel-head{display:block}
      .tag-index-page .panel-head p{margin-top:5px}
    }
    @media(max-width:520px){
      .topbar{font-size:11px}
      .footer-grid{grid-template-columns:1fr}
      .footer{padding-top:38px}
      .tag-index-page h1{font-size:32px}
      .tag-index-page .tag-item{padding:8px 13px;font-size:13px}
    }