:root{
      --theme:#0B3D91;
      --theme-deep:#082d6c;
      --theme-soft:#eaf2ff;
      --ink:#142238;
      --muted:#6b7890;
      --line:#dbe4f1;
      --paper:#f6f9fd;
      --white:#fff;
      --accent:#f28a25;
      --shadow:0 18px 50px rgba(23,55,101,.12);
      --radius:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--paper);
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;
      line-height:1.65;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .skip-link{
      position:absolute;left:16px;top:-60px;z-index:1000;
      padding:10px 16px;background:var(--theme);color:#fff;border-radius:8px
    }
    .skip-link:focus{top:12px}
    .topbar{
      background:#082b64;color:#dbe8ff;font-size:13px;
      border-bottom:1px solid rgba(255,255,255,.12)
    }
    .topbar-inner{
      min-height:38px;display:flex;align-items:center;
      justify-content:space-between;gap:20px
    }
    .topbar-contact{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{
      position:relative;z-index:50;background:#fff;
      border-bottom:1px solid var(--line)
    }
    .header-inner{
      min-height:78px;display:flex;align-items:center;gap:28px
    }
    .logo{
      display:inline-flex;align-items:center;gap:10px;
      color:var(--theme);font-size:19px;font-weight:800;white-space:nowrap
    }
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{
      margin:0;padding:0;display:flex;align-items:stretch;
      list-style:none;gap:4px
    }
    .nav-item{position:relative}
    .nav-link{
      min-height:78px;padding:0 14px;display:flex;align-items:center;
      color:#243550;font-size:15px;font-weight:600;white-space:nowrap
    }
    .nav-link:hover,.nav-link:focus-within{color:var(--theme)}
    .has-arrow:after{
      content:"";width:6px;height:6px;margin:0 0 4px 8px;
      border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;
      transform:rotate(45deg)
    }
    .dropdown-panel,.mega-menu{
      position:absolute;top:100%;left:50%;transform:translateX(-50%);
      width:330px;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:opacity .2s ease,visibility .2s ease;z-index:60
    }
    .mega-menu{width:min(780px,calc(100vw - 36px))}
    .nav-item:after{
      content:"";position:absolute;left:0;right:0;top:100%;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;pointer-events:auto
    }
    .dropdown-title,.mega-heading{
      display:flex;flex-direction:column;gap:2px;
      padding-bottom:13px;margin-bottom:12px;border-bottom:1px solid var(--line)
    }
    .dropdown-title,.mega-heading strong{color:var(--theme);font-size:16px}
    .mega-heading span{font-size:12px;color:var(--muted)}
    .dropdown-article{
      display:block;padding:9px 2px;font-size:14px;border-bottom:1px solid #edf1f6
    }
    .dropdown-article:hover{color:var(--theme)}
    .dropdown-more,.mega-footer{
      display:block;margin-top:14px;color:var(--theme);font-size:13px;font-weight:700
    }
    .mega-grid{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px
    }
    .mega-card{
      display:flex;gap:10px;min-width:0;padding:10px;
      border:1px solid #e7edf6;border-radius:11px;background:#fbfdff
    }
    .mega-card:hover{border-color:#a9c3ed;background:#f3f7ff}
    .mega-card>img{
      flex:0 0 42px;width:42px;height:42px;object-fit:cover;border-radius:8px
    }
    .mega-card-content{min-width:0;display:block}
    .mega-card-content strong{
      display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
      font-size:13px;color:#1b3153
    }
    .mega-card-content p{
      margin:3px 0 0;color:var(--muted);font-size:12px;
      display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden
    }
    .mega-card-meta{
      display:flex;flex-wrap:wrap;gap:5px 10px;margin-top:4px;
      color:#748198;font-size:11px
    }
    .mega-categories{
      display:flex;flex-wrap:wrap;gap:7px;margin:0 0 14px
    }
    .mega-categories a{
      padding:4px 9px;border-radius:20px;background:var(--theme-soft);
      color:var(--theme);font-size:12px
    }
    .header-btns{display:flex;align-items:center;gap:13px;white-space:nowrap}
    .header-btns>a:not(.logo){
      padding:9px 15px;background:var(--accent);color:#fff;
      border-radius:8px;font-size:13px;font-weight:700
    }
    .hamburger{
      display:none;width:42px;height:42px;padding:9px;border:1px solid var(--line);
      border-radius:9px;background:#fff;cursor:pointer
    }
    .hamburger span{
      display:block;width:22px;height:2px;margin:5px auto;background:var(--theme);
      transition:transform .2s,opacity .2s
    }
    .hamburger.active span:first-child{transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-7px) rotate(-45deg)}
    .drawer-overlay{
      position:fixed;inset:0;background:rgba(7,25,55,.5);opacity:0;
      visibility:hidden;transition:.25s;z-index:80
    }
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{
      position:fixed;top:0;right:0;width:min(380px,88vw);height:100vh;
      overflow:auto;background:#fff;transform:translateX(105%);
      transition:transform .3s ease;z-index:90;box-shadow:-12px 0 35px rgba(0,0,0,.18)
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:74px;padding:16px 20px;display:flex;align-items:center;
      gap:13px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:700
    }
    .drawer-head>a{margin-left:auto;padding:7px 12px;background:var(--accent);color:#fff;border-radius:7px;font-size:13px}
    .drawer-close{
      width:34px;height:34px;border:0;background:transparent;color:#53657f;
      font-size:27px;line-height:1;cursor:pointer
    }
    .drawer-menu{padding:14px 20px 32px}
    .drawer-link,.drawer-toggle{
      display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf1f6;
      background:transparent;text-align:left;color:#243550;font-weight:600;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:4px 0 8px 16px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{
      display:block;padding:8px 0;color:var(--muted);font-size:14px
    }
    .drawer-submenu a:hover{color:var(--theme)}
    body.drawer-locked{overflow:hidden}
    .tag-index-page{min-height:650px}
    .tag-hero{
      position:relative;overflow:hidden;padding:76px 0 84px;
      background:
        radial-gradient(circle at 80% 12%,rgba(242,138,37,.2),transparent 25%),
        linear-gradient(135deg,#082d6c 0%,#0B3D91 58%,#164f9f 100%);
      color:#fff
    }
    .tag-hero:before,.tag-hero:after{
      content:"";position:absolute;border:1px solid rgba(255,255,255,.14);
      border-radius:50%;pointer-events:none
    }
    .tag-hero:before{width:460px;height:460px;right:-120px;top:-210px}
    .tag-hero:after{width:670px;height:670px;left:-310px;bottom:-500px}
    .tag-hero-inner{position:relative;z-index:1;max-width:800px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;padding:5px 12px;
      border:1px solid rgba(255,255,255,.3);border-radius:30px;
      color:#dceaff;font-size:13px
    }
    .eyebrow:before{
      content:"";width:7px;height:7px;background:var(--accent);border-radius:50%
    }
    .tag-hero h1{
      margin:19px 0 14px;font-size:clamp(34px,5vw,62px);line-height:1.12;
      letter-spacing:-1px
    }
    .tag-hero p{max-width:660px;margin:0;color:#dce9ff;font-size:17px}
    .tag-content{padding:54px 0 86px}
    .section-heading{
      display:flex;align-items:end;justify-content:space-between;
      gap:20px;margin-bottom:24px
    }
    .section-heading h2{margin:0;color:#172b4a;font-size:28px}
    .section-heading p{margin:0;color:var(--muted);font-size:14px}
    .tag-cloud-panel{
      padding:34px;background:#fff;border:1px solid var(--line);
      border-radius:20px;box-shadow:var(--shadow)
    }
    .tag-cloud{
      display:flex;align-items:center;justify-content:center;flex-wrap:wrap;
      gap:14px 12px;min-height:260px
    }
    .tag-chip{
      display:inline-flex;align-items:center;gap:8px;padding:10px 17px;
      color:var(--theme);background:#eef4ff;border:1px solid #d8e6ff;
      border-radius:30px;font-size:15px;transition:.2s
    }
    .tag-chip:nth-child(3n){background:#fff4e9;border-color:#ffe0bd;color:#b95d12}
    .tag-chip:nth-child(4n){background:#edf8f5;border-color:#cceee4;color:#11705d}
    .tag-chip: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-chip:hover .tag-count{color:#dceaff}
    .tag-empty{
      width:100%;padding:45px;text-align:center;color:var(--muted);
      background:#f8fafc;border-radius:12px
    }
    .tag-guide{
      display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:24px
    }
    .guide-card{
      padding:22px;background:#fff;border:1px solid var(--line);border-radius:15px
    }
    .guide-icon{
      width:38px;height:38px;display:grid;place-items:center;margin-bottom:13px;
      color:#fff;background:var(--theme);border-radius:11px;font-weight:800
    }
    .guide-card h3{margin:0 0 6px;font-size:17px}
    .guide-card p{margin:0;color:var(--muted);font-size:13px}
    .footer{background:#071f48;color:#c5d5ed}
    .footer-main{
      display:grid;grid-template-columns:1.45fr 1fr 1fr 1fr;
      gap:38px;padding:54px 0 42px
    }
    .footer .logo{color:#fff;margin-bottom:15px}
    .footer .logo img{background:#fff;border-radius:7px}
    .footer-brand p{max-width:330px;margin:0;color:#9fb4d3;font-size:13px}
    .footer h3{margin:5px 0 15px;color:#fff;font-size:15px}
    .footer-links,.footer-contact{display:flex;flex-direction:column;gap:8px}
    .footer-links a,.footer-contact a{color:#a9bdd8;font-size:13px}
    .footer-links a:hover,.footer-contact a:hover{color:#fff}
    .footer-social{margin-top:8px;font-size:13px;color:#a9bdd8}
    .footer-social strong{display:block;color:#e2ebf8;margin-bottom:3px}
    .footer-bottom{
      min-height:60px;display:flex;align-items:center;justify-content:space-between;
      gap:20px;border-top:1px solid rgba(255,255,255,.12);
      color:#8ea5c5;font-size:12px
    }
    .footer-bottom-links{display:flex;gap:18px}
    @media (max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .footer-main{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-contact{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:68px;gap:12px}
      .logo{font-size:16px}
      .logo img{width:32px;height:32px}
      .header-btns>a:not(.logo){display:none}
      .tag-hero{padding:54px 0 60px}
      .tag-hero p{font-size:15px}
      .tag-content{padding:36px 0 58px}
      .section-heading{display:block}
      .section-heading h2{font-size:24px;margin-bottom:5px}
      .tag-cloud-panel{padding:22px 15px}
      .tag-cloud{gap:10px 8px;min-height:190px}
      .tag-chip{padding:8px 12px;font-size:13px}
      .tag-guide{grid-template-columns:1fr}
      .footer-main{grid-template-columns:1fr;gap:24px;padding:38px 0 30px}
      .footer-bottom{padding:16px 0;align-items:flex-start;flex-direction:column}
      .footer-bottom-links{flex-direction:column;gap:3px}
    }
    .topbar .header .main-nav .mega-menu{}
    .mobile-drawer.open .drawer-menu{}
    .drawer-overlay.open{}