:root{
      --primary:#0B3D91;
      --primary-dark:#082c68;
      --ink:#14233b;
      --muted:#6d7b90;
      --line:#dfe6ef;
      --soft:#f3f7fc;
      --white:#fff;
      --shadow:0 14px 40px rgba(14,45,87,.09);
      --radius:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fc;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.6}
    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:#092d68;color:#dbe8fa;font-size:13px}
    .topbar .container{height:36px;display:flex;align-items:center;justify-content:space-between}
    .topbar-links{display:flex;gap:22px}
    .topbar a:hover{color:#fff}

    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--primary);font-weight:800;font-size:20px}
    .logo img{width:40px;height:40px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:4px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:27px 14px;color:#253650;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--primary)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg) translateY(-2px)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translate(-50%,8px);width:300px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s ease;z-index:30}
    .mega-menu{width:650px}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .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;transform:translate(-50%,0)}
    .dropdown-panel>a{display:block;padding:9px 10px;border-bottom:1px solid #edf1f6;font-size:14px}
    .dropdown-panel>a:hover{color:var(--primary);background:var(--soft)}
    .mega-section-title{margin:0 0 12px;color:var(--primary);font-size:14px;font-weight:700}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;min-width:0;padding:10px;border:1px solid #e8edf4;border-radius:10px;background:#fbfcfe}
    .mega-card:hover{border-color:#a8c0e7;background:#f3f7fd}
    .mega-card img{width:40px;height:40px;object-fit:contain;border-radius:7px;flex:0 0 40px}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card strong{font-size:13px;color:#1a2d49}
    .mega-card small{font-size:11px;color:var(--muted)}
    .mega-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}
    .mega-links a{padding:6px 10px;color:var(--primary);font-size:13px;background:#edf4ff;border-radius:8px}

    .header-btns{display:flex;align-items:center;gap:12px}
    .member-btn{padding:9px 15px;border-radius:8px;background:var(--primary);color:#fff;font-size:13px;font-weight:700}
    .member-btn:hover{background:var(--primary-dark)}
    .hamburger{display:none;width:40px;height:40px;padding:8px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:5px 0;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;inset:0;background:rgba(5,22,48,.48);opacity:0;visibility:hidden;transition:.25s;z-index:50}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(390px,88vw);height:100vh;overflow:auto;background:#fff;transform:translateX(105%);transition:.3s ease;z-index:60;box-shadow:-10px 0 35px rgba(0,0,0,.15)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:22px 20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head>a{margin-left:auto;padding:7px 12px;background:var(--primary);border-radius:7px;color:#fff;font-size:13px}
    .drawer-close{border:0;background:none;color:#64748b;font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf1f6;background:none;text-align:left;color:#223854;cursor:pointer;font-size:15px}
    .drawer-toggle{display:flex;justify-content:space-between}
    .drawer-toggle:after{content:"+";color:var(--primary);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:5px 0 8px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}

    .tag-index-page{min-height:520px;padding:64px 0 86px}
    .tag-hero{text-align:center;max-width:760px;margin:0 auto 38px}
    .eyebrow{display:inline-flex;padding:5px 12px;border-radius:999px;background:#e7f0ff;color:var(--primary);font-size:13px;font-weight:700}
    .tag-hero h1{margin:16px 0 12px;font-size:clamp(30px,4vw,46px);line-height:1.2;color:#122b50}
    .tag-hero p{margin:0;color:var(--muted);font-size:16px}
    .tag-cloud-panel{padding:34px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:var(--shadow)}
    .tag-cloud-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:26px;padding-bottom:18px;border-bottom:1px solid var(--line)}
    .tag-cloud-head h2{margin:0;font-size:21px;color:#19365d}
    .tag-cloud-head span{color:var(--muted);font-size:13px}
    .tag-cloud{display:flex;align-items:center;justify-content:center;gap:14px 16px;flex-wrap:wrap;padding:16px 8px 8px}
    .tag-cloud a{display:inline-flex;align-items:center;gap:6px;padding:10px 16px;border:1px solid #d9e5f6;border-radius:999px;color:#31527e;background:#f8fbff;transition:.2s}
    .tag-cloud a:hover{border-color:var(--primary);background:var(--primary);color:#fff;transform:translateY(-2px);box-shadow:0 8px 18px rgba(11,61,145,.18)}
    .tag-cloud a:nth-child(3n){font-size:18px;color:var(--primary);font-weight:700}
    .tag-cloud a:nth-child(4n){font-size:14px}
    .tag-cloud a:nth-child(5n){background:#fff7e9;border-color:#f3dfb5;color:#8b5b14}
    .tag-cloud a:nth-child(7n){background:#eaf8f5;border-color:#bde8dc;color:#14735f}
    .tag-cloud em{font-style:normal;font-size:11px;color:inherit;opacity:.7}
    .tag-tip{margin:28px 0 0;padding:15px 18px;border-radius:12px;background:#f4f8fd;color:#60738d;font-size:13px;text-align:center}

    .footer{padding:54px 0 0;background:#0b1c35;color:#c6d3e6}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px;padding-bottom:42px}
    .footer strong{display:block;color:#fff;font-size:20px;margin-bottom:12px}
    .footer p{margin:0;color:#9fb1ca;font-size:13px;line-height:1.8}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer-grid>div:not(.footer-brand) a{display:block;margin:8px 0;color:#aebed3;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-top:1px solid rgba(255,255,255,.12);color:#8fa2bd;font-size:12px}

    @media(max-width:1050px){
      .header-inner{gap:15px}
      .nav-link{padding-left:8px;padding-right:8px}
      .mega-menu{width:600px}
    }
    @media(max-width:820px){
      .topbar .container{height:auto;min-height:36px;padding-top:7px;padding-bottom:7px}
      .topbar .container,.topbar-links{gap:8px;flex-wrap:wrap}
      .main-nav{display:none}
      .hamburger{display:block}
      .header-inner{min-height:68px}
      .tag-index-page{padding:42px 0 60px}
      .tag-cloud-panel{padding:22px 16px}
      .tag-cloud-head{align-items:flex-start;flex-direction:column;gap:5px}
      .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px}
    }
    @media(max-width:520px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{font-size:11px}
      .topbar-links{font-size:11px}
      .logo span{font-size:17px}
      .member-btn{display:none}
      .tag-hero h1{font-size:32px}
      .tag-cloud a{padding:8px 12px;font-size:13px}
      .tag-cloud a:nth-child(3n){font-size:16px}
      .footer-grid{grid-template-columns:1fr}
      .footer-bottom{align-items:flex-start;flex-direction:column}
    }