:root{
      --theme:#0B3D91;
      --theme-deep:#062653;
      --ink:#142033;
      --muted:#6b778c;
      --line:#e6ebf2;
      --soft:#f4f7fb;
      --white:#fff;
      --shadow:0 18px 48px rgba(17,42,78,.11);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:#f7f9fc;color:var(--ink);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:#071528;color:#d7e3f5;font-size:13px}
    .topbar .container{min-height:38px;display:flex;justify-content:space-between;align-items:center;gap:20px}
    .topbar a{margin-left:20px;color:#d7e3f5}
    .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;flex:0 0 auto;font-size:18px;font-weight:800;color:var(--theme-deep)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:stretch;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;min-height:78px;padding:0 14px;font-size:15px;font-weight:600;color:#30415a;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:0 0 3px 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%) translateY(8px);width:310px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}
    .mega-menu{width:620px}
    .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;transform:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-14px;left:0;right:0;height:14px}
    .drop-title,.mega-title{margin-bottom:12px;color:var(--theme);font-size:14px;font-weight:800}
    .drop-list{display:grid;gap:3px}
    .drop-list a{display:block;padding:8px 10px;border-radius:8px;color:#42536b;font-size:14px}
    .drop-list a:hover{background:var(--soft);color:var(--theme)}
    .drop-list small{color:var(--muted)}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{min-height:112px;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fbfcfe;transition:.2s}
    .mega-card:hover{border-color:#a8c0e6;background:#f1f6ff;transform:translateY(-2px)}
    .mega-card img{width:32px;height:32px;object-fit:contain;margin-bottom:8px}
    .mega-card strong{display:block;color:#233650;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card small{display:block;margin-top:4px;color:var(--muted);font-size:11px;line-height:1.45}
    .mega-footer{display:block;margin-top:16px;padding-top:13px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px;flex:0 0 auto}
    .member-btn,.open-btn{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:0 14px;border-radius:8px;font-size:13px;font-weight:700}
    .member-btn{color:var(--theme);border:1px solid #bfd0e8;background:#f5f8fd}
    .open-btn{color:#fff;background:var(--theme)}
    .member-btn:hover{background:#eaf1fb}
    .open-btn:hover{background:#092f70}

    .hamburger{display:none;width:42px;height:40px;padding:8px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}
    .hamburger span{display:block;width:22px;height:2px;margin:4px auto;background:var(--theme-deep);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{position:fixed;inset:0;z-index:40;background:rgba(4,16,34,.58);opacity:0;visibility:hidden;transition:.25s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;z-index:41;width:min(370px,88vw);overflow:auto;background:#fff;transform:translateX(100%);transition:.28s ease;box-shadow:-18px 0 50px rgba(0,0,0,.18)}
    .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:800;color:var(--theme-deep)}
    .drawer-head>a{margin-left:auto;color:var(--theme);font-size:14px}
    .drawer-close{width:32px;height:32px;border:0;background:#eef3fa;border-radius:50%;color:var(--theme-deep);font-size:24px;line-height:1;cursor:pointer}
    .drawer-menu{padding:12px 20px 28px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid var(--line);background:transparent;color:#263851;text-align:left;font-size:15px;font-weight:700;cursor:pointer}
    .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: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{padding:72px 0 90px}
    .tag-hero{text-align:center;margin-bottom:38px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:13px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.14em}
    .eyebrow:before{content:"";width:22px;height:2px;background:var(--theme)}
    .tag-hero h1{margin:0;color:#112d54;font-size:clamp(30px,5vw,52px);line-height:1.18;letter-spacing:-.04em}
    .tag-hero p{max-width:680px;margin:18px auto 0;color:var(--muted);font-size:16px}
    .tag-panel{padding:34px;border:1px solid var(--line);border-radius:24px;background:#fff;box-shadow:var(--shadow)}
    .tag-panel-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:25px;padding-bottom:18px;border-bottom:1px solid var(--line)}
    .tag-panel-head h2{margin:0;color:#1a3458;font-size:22px}
    .tag-panel-head span{color:var(--muted);font-size:13px}
    .tag-cloud{display:flex;align-items:center;justify-content:center;gap:13px 14px;min-height:300px;padding:25px 12px}
    .tag-cloud a{display:inline-flex;align-items:center;gap:8px;padding:10px 16px;border:1px solid #d7e2f0;border-radius:999px;background:#f8fbff;color:#315277;transition:.2s}
    .tag-cloud a:nth-child(3n){font-size:20px;color:#164d98}
    .tag-cloud a:nth-child(4n){font-size:14px}
    .tag-cloud a:nth-child(5n){font-size:18px;color:#0b6d73;background:#f0fbfa}
    .tag-cloud a:nth-child(6n){font-size:22px;color:#8a5d13;background:#fff9eb;border-color:#f0dfb2}
    .tag-cloud a:hover{color:#fff;background:var(--theme);border-color:var(--theme);transform:translateY(-3px);box-shadow:0 8px 18px rgba(11,61,145,.2)}
    .tag-count{font-size:11px;color:var(--muted)}
    .tag-cloud a:hover .tag-count{color:#dbe8ff}
    .tag-note{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:20px;padding-top:22px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;text-align:center}
    .tag-note strong{color:var(--theme)}

    .footer{padding:58px 0 22px;background:#071528;color:#aebdd0}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:38px}
    .footer-brand strong{display:block;margin-bottom:14px;color:#fff;font-size:20px}
    .footer p{margin:0 0 9px;font-size:13px;line-height:1.8}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-grid>div:not(.footer-brand) a,.footer-grid>div:not(.footer-brand)>span{display:block;margin:8px 0;color:#aebdd0;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:25px;margin-top:42px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#8293aa}

    @media (max-width:980px){
      .main-nav{display:none}
      .header-btns .member-btn,.header-btns .open-btn{display:none}
      .hamburger{display:block}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{display:block;padding:8px 0;text-align:center;line-height:1.8}
      .topbar a{margin:0 0 0 12px}
      .header-inner{min-height:68px}
      .logo span{font-size:16px}
      .tag-index-page{padding:48px 0 60px}
      .tag-hero h1{font-size:34px}
      .tag-hero p{font-size:14px}
      .tag-panel{padding:22px 16px;border-radius:18px}
      .tag-panel-head{display:block}
      .tag-panel-head span{display:block;margin-top:7px}
      .tag-cloud{gap:10px;min-height:240px;padding:12px 0}
      .tag-cloud a,.tag-cloud a:nth-child(3n),.tag-cloud a:nth-child(4n),.tag-cloud a:nth-child(5n),.tag-cloud a:nth-child(6n){font-size:14px;padding:8px 12px}
      .tag-note{display:block}
      .footer-grid{grid-template-columns:1fr;gap:25px}
      .footer-bottom{display:block;line-height:1.9}
      .footer-bottom span{display:block;margin-top:4px}
    }