:root{
      --theme:#0B3D91;
      --theme-dark:#082b67;
      --ink:#14233b;
      --muted:#64748b;
      --line:#dce5f0;
      --soft:#f4f7fb;
      --white:#fff;
      --accent:#54d6b2;
      --shadow:0 16px 45px rgba(11,61,145,.12);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7faff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","微软雅黑",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:#071a3b;color:#d9e7ff;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar a{color:#d9e7ff;margin-left:22px}
    .topbar strong{color:#fff}

    .header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);box-shadow:0 5px 20px rgba(8,43,103,.05);backdrop-filter:blur(14px)}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;color:var(--theme);font-size:18px;font-weight:800;white-space:nowrap}
    .logo img{width:38px;height:38px;object-fit:contain;border-radius:10px}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;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:26px 13px;color:#30415d;font-size:14px;font-weight:650;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg) translateY(-2px)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);width:270px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:40}
    .mega-menu{width:650px}
    .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:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-14px;height:14px}
    .dropdown-panel a,.mega-links a{display:block;padding:8px 9px;color:#53637b;font-size:13px;border-radius:8px}
    .dropdown-panel a:hover,.mega-links a:hover{background:#eef4ff;color:var(--theme)}
    .mega-title{margin:0 0 12px;color:var(--theme);font-size:13px;font-weight:800}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
    .mega-card{display:flex;align-items:center;gap:9px;padding:9px;border:1px solid #e6edf7;border-radius:10px;color:#52627a;font-size:11px;line-height:1.35}
    .mega-card:hover{border-color:#9bb9ea;background:#f7faff}
    .mega-card img{width:34px;height:34px;object-fit:cover;border-radius:7px;background:#edf3fb}
    .mega-card b{display:block;color:#223654;font-size:12px;margin-bottom:2px}
    .mega-card span span{display:inline;color:#71809a}
    .mega-links{display:grid;grid-template-columns:repeat(4,1fr);gap:3px}
    .mega-footer{display:block;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:700}

    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .header-btns>a:first-child{color:var(--theme);font-size:13px;font-weight:700}
    .account-btn{padding:10px 16px;background:var(--theme);color:#fff;border-radius:9px;font-size:13px;font-weight:700}
    .account-btn:hover{background:var(--theme-dark)}
    .hamburger{display:none;width:42px;height:40px;padding:9px;border:1px solid var(--line);border-radius:9px;background:#fff;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{position:fixed;inset:0;background:rgba(4,20,49,.5);opacity:0;visibility:hidden;transition:.25s;z-index:60}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:-370px;width:min(370px,88vw);height:100vh;padding:22px;background:#fff;overflow-y:auto;transition:right .28s;z-index:70;box-shadow:-12px 0 35px rgba(0,0,0,.15)}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:14px;padding-bottom:18px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:800}
    .drawer-head span{flex:1}
    .drawer-head a{padding:7px 12px;background:var(--theme);color:#fff;border-radius:7px;font-size:13px}
    .drawer-close{border:0;background:transparent;color:#53637b;font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding-top:12px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 4px;border:0;border-bottom:1px solid #edf1f6;background:transparent;color:#253854;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{max-height:0;overflow:hidden;transition:max-height .25s;background:#f5f8fd}
    .drawer-submenu.open{max-height:700px}
    .drawer-submenu a{display:block;padding:9px 15px;color:#61718a;font-size:13px;border-bottom:1px solid #e7edf5}

    .tag-index-page{min-height:620px;padding:70px 0 100px;background:linear-gradient(180deg,#f8fbff 0%,#fff 58%,#f4f8fe 100%)}
    .tag-hero{text-align:center;max-width:760px;margin:0 auto 42px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border:1px solid #cfe0fa;border-radius:999px;color:var(--theme);background:#eef5ff;font-size:12px;font-weight:800;letter-spacing:.08em}
    .eyebrow:before{content:"";width:7px;height:7px;background:var(--accent);border-radius:50%;box-shadow:0 0 0 5px rgba(84,214,178,.16)}
    .tag-hero h1{margin:18px 0 12px;color:#122b53;font-size:clamp(32px,5vw,54px);line-height:1.15;letter-spacing:-.04em}
    .tag-hero p{margin:0;color:var(--muted);font-size:16px}
    .tag-cloud-panel{padding:36px 42px;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
    .panel-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:25px;padding-bottom:17px;border-bottom:1px solid #e8eef6}
    .panel-heading h2{margin:0;color:#1c3457;font-size:21px}
    .panel-heading span{color:#8592a6;font-size:13px}
    .tag-cloud{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:13px 15px;min-height:220px;padding:15px 4px}
    .tag-cloud a{display:inline-block;padding:9px 16px;border:1px solid #d8e5f7;border-radius:999px;background:#f7faff;color:#31527e;font-size:15px;transition:.2s}
    .tag-cloud a:nth-child(3n){font-size:19px;color:var(--theme);background:#edf4ff}
    .tag-cloud a:nth-child(4n){font-size:13px;color:#287b6d;border-color:#c5ece2;background:#f0fbf8}
    .tag-cloud a:nth-child(5n){font-size:22px;font-weight:750}
    .tag-cloud a:hover{transform:translateY(-3px);border-color:var(--theme);background:var(--theme);color:#fff;box-shadow:0 8px 18px rgba(11,61,145,.18)}
    .tag-note{margin:25px 0 0;padding:17px 20px;border-radius:12px;background:#f3f7fc;color:#687990;font-size:13px;text-align:center}
    .tag-cta{display:flex;justify-content:center;gap:12px;margin-top:30px}
    .tag-cta a{padding:12px 21px;border-radius:9px;font-size:14px;font-weight:750}
    .tag-cta a:first-child{background:var(--theme);color:#fff}
    .tag-cta a:last-child{border:1px solid #bfd1ea;color:var(--theme);background:#fff}

    .footer{padding:58px 0 22px;background:#071a3b;color:#b7c8e1}
    .footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1.1fr;gap:35px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:20px}
    .footer h4{margin:0 0 15px;color:#fff;font-size:14px}
    .footer p{margin:7px 0;font-size:13px;line-height:1.75}
    .footer a{display:block;margin:7px 0;color:#b7c8e1;font-size:13px}
    .footer a:hover{color:#fff}
    .footer-brand p{max-width:290px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:42px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);font-size:12px;color:#8fa5c3}

    @media (max-width:1050px){
      .nav-link{padding-left:8px;padding-right:8px}
      .logo{min-width:155px}
    }
    @media (max-width:820px){
      .container{width:min(100% - 28px,680px)}
      .topbar .container{min-height:48px;align-items:flex-start;justify-content:center;flex-direction:column;gap:0}
      .topbar a{margin-left:12px}
      .main-nav{display:none}
      .header-inner{min-height:68px;justify-content:space-between;gap:12px}
      .header-btns{margin-left:auto}
      .header-btns>a:first-child{display:none}
      .hamburger{display:block}
      .tag-index-page{padding:48px 0 70px}
      .tag-cloud-panel{padding:25px 18px}
      .panel-heading{align-items:flex-start;flex-direction:column;gap:5px}
      .tag-cloud{gap:10px 9px}
      .tag-cloud a{padding:8px 12px;font-size:13px}
      .tag-cloud a:nth-child(3n){font-size:16px}
      .tag-cloud a:nth-child(5n){font-size:18px}
      .footer-grid{grid-template-columns:repeat(2,1fr);gap:28px 20px}
      .footer-bottom{flex-direction:column;gap:8px}
    }
    @media (max-width:500px){
      .topbar{font-size:11px}
      .topbar a{margin-left:8px}
      .logo{font-size:15px;min-width:0}
      .logo img{width:32px;height:32px}
      .account-btn{padding:8px 10px;font-size:12px}
      .tag-hero h1{font-size:34px}
      .tag-hero p{font-size:14px}
      .tag-cloud-panel{border-radius:17px}
      .tag-cloud{min-height:180px}
      .tag-note{text-align:left}
      .tag-cta{flex-direction:column}
      .tag-cta a{text-align:center}
      .footer-grid{grid-template-columns:1fr}
    }