:root{
  --theme:#0B3D91;
  --theme-dark:#071f4d;
  --ink:#17233d;
  --muted:#6d7890;
  --line:#dfe6f1;
  --surface:#ffffff;
  --soft:#f4f7fb;
  --shadow:0 18px 50px rgba(20,47,92,.12);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#f7f9fc;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.6}
a{color:inherit;text-decoration:none}
button{font:inherit}
.container{width:min(1180px,calc(100% - 40px));margin:0 auto}
.topbar{background:#071a3c;color:#d9e6ff;font-size:13px}
.topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.topbar a{margin-left:22px;color:#d9e6ff}
.header{position:relative;z-index:20;background:#fff;border-bottom:1px solid #e7edf5}
.header-inner{min-height:78px;display:flex;align-items:center;gap:30px}
.logo{display:flex;align-items:center;gap:10px;min-width:180px;font-size:19px;font-weight:800;color:var(--theme)}
.logo img{width:38px;height:38px;object-fit:contain}
.main-nav{flex:1}
.nav-list{display:flex;justify-content:center;align-items:stretch;gap:3px;padding:0;margin:0;list-style:none}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;min-height:78px;padding:0 15px;font-size:15px;font-weight:600;color:#2a3853;white-space:nowrap}
.nav-link:hover,.nav-link:focus{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%;width:340px;padding:20px;background:#fff;border:1px solid #e5ebf4;border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translate(-50%,8px);transition:.2s ease}
.mega-menu{width:590px}
.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)}
.nav-item:hover:after,.nav-item:focus-within:after{content:"";position:absolute;left:0;right:0;top:100%;height:12px}
.panel-title{margin:0 0 14px;color:var(--theme);font-weight:800;font-size:14px}
.panel-list{display:grid;gap:8px}
.panel-list a{display:block;padding:7px 9px;border-radius:8px;font-size:14px}
.panel-list a:hover{background:#f0f5ff;color:var(--theme)}
.mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.mega-card{display:block;padding:11px;border:1px solid #e5ebf4;border-radius:11px;background:#fbfcff}
.mega-card:hover{border-color:#9bb8e8;background:#f5f8ff}
.mega-card strong{display:flex;align-items:center;gap:7px;font-size:13px;color:#243452}
.mega-card strong img,.mega-card>img{width:22px;height:22px;object-fit:contain;vertical-align:middle}
.mega-card small{display:block;margin-top:4px;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(--theme);font-size:13px;font-weight:700}
.header-btns{display:flex;align-items:center;gap:9px;white-space:nowrap}
.member-btn,.open-btn{padding:9px 14px;border-radius:9px;font-size:13px;font-weight:700}
.member-btn{color:var(--theme);background:#edf3ff}
.open-btn{color:#fff;background:var(--theme)}
.hamburger{display:none;width:42px;height:40px;padding:8px;border:1px solid #dbe4f1;border-radius:9px;background:#fff;cursor:pointer}
.hamburger span{display:block;height:2px;margin:5px 0;background:var(--theme);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;z-index:29;background:rgba(4,18,43,.5);opacity:0;visibility:hidden;transition:.25s}
.drawer-overlay.open{opacity:1;visibility:visible}
.mobile-drawer{position:fixed;top:0;right:0;z-index:30;width:min(390px,88vw);height:100vh;overflow:auto;background:#fff;transform:translateX(100%);transition:.28s ease;box-shadow:-18px 0 55px rgba(6,29,67,.2)}
.mobile-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;gap:12px;padding:18px 20px;border-bottom:1px solid var(--line);font-weight:800;color:var(--theme)}
.drawer-head span{flex:1}
.drawer-head a{padding:7px 12px;border-radius:7px;background:var(--theme);color:#fff;font-size:13px}
.drawer-close{border:0;background:transparent;color:#64728a;font-size:29px;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:#263754;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:grid;gap:5px;max-height:0;overflow:hidden;transition:max-height .25s ease}
.drawer-submenu.open{max-height:500px;padding:8px 0 10px}
.drawer-submenu a{padding:6px 12px;color:var(--muted);font-size:14px}
.footer{margin-top:70px;background:#071a3c;color:#cbd8ed}
.footer .container{padding:46px 0 20px}
.footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1fr;gap:36px}
.footer-brand strong{display:block;margin-bottom:12px;color:#fff;font-size:20px}
.footer p{margin:7px 0;color:#aebed8;font-size:13px}
.footer h3{margin:0 0 13px;color:#fff;font-size:15px}
.footer-grid>div:not(.footer-brand) a{display:block;margin:7px 0;color:#b8c7df;font-size:13px}
.footer-grid a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:35px;padding-top:17px;border-top:1px solid rgba(255,255,255,.14);color:#91a5c5;font-size:12px}
.tag-index-page{padding:78px 0 10px;background:linear-gradient(180deg,#f7f9fc 0%,#fff 70%)}
.tag-index-page .page-intro{text-align:center;max-width:720px;margin:0 auto 42px}
.tag-index-page .eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;color:var(--theme);font-size:13px;font-weight:800;letter-spacing:.12em}
.tag-index-page .eyebrow:before{content:"";width:24px;height:2px;background:var(--theme)}
.tag-index-page h1{margin:0;color:#102852;font-size:clamp(34px,5vw,58px);line-height:1.15;letter-spacing:-.04em}
.tag-index-page .intro-text{margin:18px 0 0;color:var(--muted);font-size:16px}
.tag-cloud-panel{position:relative;overflow:hidden;padding:46px 42px 50px;border:1px solid #dce6f4;border-radius:24px;background:#fff;box-shadow:var(--shadow)}
.tag-cloud-panel:before,.tag-cloud-panel:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
.tag-cloud-panel:before{width:260px;height:260px;right:-90px;top:-120px;background:radial-gradient(circle,rgba(11,61,145,.14),transparent 68%)}
.tag-cloud-panel:after{width:210px;height:210px;left:-90px;bottom:-110px;background:radial-gradient(circle,rgba(54,132,220,.12),transparent 68%)}
.cloud-heading{position:relative;z-index:1;display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.cloud-heading h2{margin:0;color:#19335f;font-size:22px}
.cloud-heading p{margin:0;color:var(--muted);font-size:13px}
.tag-cloud{position:relative;z-index:1;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:14px 16px;padding:12px 10px}
.tag-cloud a{display:inline-flex;align-items:center;gap:7px;padding:10px 16px;border:1px solid #dce6f4;border-radius:999px;background:#f8fbff;color:#31527e;font-size:15px;transition:.2s ease}
.tag-cloud a:nth-child(3n){font-size:20px;color:#0b3d91}
.tag-cloud a:nth-child(4n){font-size:13px;color:#58749e}
.tag-cloud a:nth-child(5n){background:#edf4ff;color:#163f82}
.tag-cloud a:hover{transform:translateY(-3px);border-color:#79a0dc;background:var(--theme);color:#fff;box-shadow:0 8px 20px rgba(11,61,145,.2)}
.tag-cloud .tag-count{font-size:11px;opacity:.7}
.tag-index-page .tag-note{margin:25px 0 0;text-align:center;color:#7d899d;font-size:13px}
@media(max-width:1050px){
  .nav-link{padding:0 9px;font-size:14px}
  .logo{min-width:145px}
  .member-btn{display:none}
}
@media(max-width:820px){
  .container{width:min(100% - 30px,620px)}
  .topbar .container{min-height:44px;align-items:flex-start;justify-content:center;flex-direction:column;gap:0;padding:7px 0}
  .topbar a{margin-left:14px}
  .header-inner{min-height:68px}
  .main-nav{display:none}
  .header-btns{margin-left:auto}
  .hamburger{display:block}
  .tag-index-page{padding-top:52px}
  .tag-cloud-panel{padding:30px 18px 34px;border-radius:18px}
  .cloud-heading{display:block}
  .cloud-heading p{margin-top:7px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px 20px}
  .footer-brand{grid-column:1/-1}
  .footer-bottom{display:block}
  .footer-bottom span{display:block;margin-top:5px}
}
@media(max-width:480px){
  .topbar{font-size:11px}
  .topbar a{margin-left:8px}
  .logo{font-size:16px;min-width:0}
  .logo img{width:32px;height:32px}
  .open-btn{display:none}
  .tag-index-page h1{font-size:37px}
  .tag-index-page .intro-text{font-size:14px}
  .tag-cloud a{padding:8px 12px;font-size:13px}
  .tag-cloud a:nth-child(3n){font-size:17px}
  .footer-grid{grid-template-columns:1fr}
}