:root{--主题色:#0B3D91;--深色:#101827;--浅色:#f5f7fb;--边框:#e4e8f0;--文字:#253044;--次要:#6d7788}
    *{box-sizing:border-box}
    body{margin:0;color:var(--文字);background:#fff;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 36px));margin:auto}
    .topbar{background:var(--深色);color:#dbe4f2;font-size:13px}
    .topbar .container{height:38px;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(--边框)}
    .header-inner{height:78px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:10px;color:var(--深色);font-size:20px;font-weight:800;white-space:nowrap}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:26px 14px;font-size:15px;color:#334057;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--主题色)}
    .has-arrow:after{content:"⌄";margin-left:6px;font-size:12px}
    .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(--边框);border-radius:0 0 12px 12px;box-shadow:0 18px 40px #14213d1c;opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .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;transform:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .drop-title,.mega-title{font-weight:800;margin:0 0 12px;color:var(--深色)}
    .drop-list,.mega-links{display:grid;gap:8px}
    .drop-list a,.mega-links a{font-size:14px;padding:5px 0;color:#556176}
    .drop-list a:hover,.mega-links a:hover{color:var(--主题色)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:9px;padding:10px;border:1px solid var(--边框);border-radius:9px}
    .mega-card:hover{border-color:var(--主题色);background:#f7faff}
    .mega-card img{width:30px;height:30px;object-fit:contain;flex:none}
    .mega-card span{display:grid;gap:2px;min-width:0}
    .mega-card strong{font-size:13px}
    .mega-card small{font-size:11px;color:var(--次要);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-columns{display:grid;grid-template-columns:1fr 1fr;gap:28px}
    .mega-footer{display:block;margin-top:16px;padding-top:12px;border-top:1px solid var(--边框);color:var(--主题色);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .member-btn{padding:8px 14px;background:var(--主题色);color:#fff;border-radius:6px;font-size:13px}
    .account-link{font-size:14px;color:var(--主题色)}
    .hamburger{display:none;border:0;background:none;padding:6px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;margin:5px 0;background:var(--深色);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{display:none;position:fixed;inset:0;background:#08122599;z-index:50}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(390px,88%);height:100vh;background:#fff;z-index:60;transform:translateX(100%);transition:.25s;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:16px;padding:20px;border-bottom:1px solid var(--边框)}
    .drawer-head strong{flex:1;color:var(--深色)}
    .drawer-head a{color:var(--主题色);font-size:14px}
    .drawer-close{border:0;background:none;font-size:28px;color:var(--次要);cursor:pointer}
    .drawer-menu{padding:12px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf0f5;background:none;text-align:left;font-size:15px;color:var(--文字);cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--次要)}
    .drawer-toggle.active{color:var(--主题色)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:4px 0 8px 15px}
    .drawer-submenu.open{display:grid}
    .drawer-submenu a{padding:7px 0;font-size:14px;color:var(--次要)}
    .tag-page{background:var(--浅色);padding:56px 0 80px;min-height:560px}
    .tag-heading{text-align:center;margin-bottom:34px}
    .tag-kicker{display:inline-block;color:var(--主题色);font-size:13px;font-weight:700;letter-spacing:2px}
    .tag-heading h1{margin:8px 0 7px;font-size:36px;line-height:1.25;color:var(--深色)}
    .tag-heading p{margin:0;color:var(--次要)}
    .tag-count{display:inline-block;margin-top:14px;padding:5px 13px;background:#e8effd;color:var(--主题色);border-radius:99px;font-size:13px}
    .tag-articles{display:grid;gap:18px}
    .tag-article{display:grid;grid-template-columns:245px 1fr;gap:24px;padding:18px;background:#fff;border:1px solid var(--边框);border-radius:12px;box-shadow:0 5px 18px #20345c08}
    .tag-article-image{height:165px;background:#e9eef7;border-radius:8px;overflow:hidden}
    .tag-article-image img{width:100%;height:100%;object-fit:cover}
    .article-body{min-width:0}
    .article-label{display:inline-block;color:var(--主题色);font-size:12px;margin-bottom:5px}
    .article-body h2{margin:0 0 8px;font-size:21px;line-height:1.4;color:var(--深色)}
    .article-body h2 a:hover{color:var(--主题色)}
    .article-summary{margin:0 0 12px;color:var(--次要);font-size:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
    .article-meta{display:flex;flex-wrap:wrap;gap:13px;color:#8993a3;font-size:12px}
    .article-tags{margin-top:9px;color:var(--主题色);font-size:12px}
    .read-link{display:inline-block;margin-top:13px;color:var(--主题色);font-size:13px;font-weight:700}
    .pagination{display:flex;justify-content:center;gap:7px;margin-top:34px;flex-wrap:wrap}
    .pagination a{padding:7px 13px;border:1px solid var(--边框);background:#fff;border-radius:5px;font-size:13px}
    .pagination a.active,.pagination a:hover{background:var(--主题色);color:#fff;border-color:var(--主题色)}
    .footer{background:var(--深色);color:#aeb9ca;padding:48px 0 20px}
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:35px}
    .footer-brand strong{font-size:20px;color:#fff}
    .footer p{margin:9px 0;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;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #ffffff1a;margin-top:30px;padding-top:18px;font-size:12px}
    @media(max-width:900px){
      .main-nav{display:none}.header-inner{height:68px}.header-btns{margin-left:auto}.hamburger{display:block}
      .member-btn{display:none}.account-link{font-size:13px}.footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:620px){
      .container{width:min(100% - 28px,1180px)}.topbar .container{height:auto;padding:8px 0;display:block}.topbar-links{gap:12px;margin-top:2px;font-size:12px}
      .tag-page{padding:38px 0 58px}.tag-heading h1{font-size:29px}.tag-article{grid-template-columns:1fr;gap:15px;padding:14px}.tag-article-image{height:190px}.article-body h2{font-size:19px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 16px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:5px}
      .mega-menu,.dropdown-panel{display:none}
    }