:root{
  --bg:#f3f6fb; --card:#fff; --ink:#0f172a; --muted:#5b667a;
  --line:#e6ebf5; --blue:#1f4f9c; --blue2:#163b78; --orange:#f08a24;
  --shadow:0 16px 40px rgba(15,23,42,.10); --r:18px;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);
background:radial-gradient(1200px 420px at 50% 0%, rgba(31,79,156,.18), transparent 60%), linear-gradient(#eef3fb,var(--bg));}
a{text-decoration:none;color:inherit}
.gpk-container{max-width:1180px;margin:0 auto;padding:0 18px}

.gpk-topbar{position:sticky;top:0;z-index:50;background:linear-gradient(90deg,var(--blue2),var(--blue));border-bottom:1px solid rgba(255,255,255,.12)}
.gpk-topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 0}
.gpk-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:900}
.gpk-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22)}
.gpk-name{letter-spacing:.2px}
.gpk-menu{list-style:none;display:flex;gap:16px;margin:0;padding:0;color:rgba(255,255,255,.9);font-weight:700;font-size:14px}
.gpk-menu li a{opacity:.92}
.gpk-menu li a:hover{opacity:1}
@media(max-width:980px){.gpk-nav{display:none}}

.gpk-btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;border-radius:12px;font-weight:900}
.gpk-btn-primary{background:var(--orange);color:#1a1208;box-shadow:0 10px 22px rgba(240,138,36,.28)}
.gpk-footer{border-top:1px solid var(--line);padding:22px 0 30px;color:var(--muted);font-size:13px;margin-top:26px}
.gpk-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.gpk-card-pad{padding:18px}
.gpk-pagehead{margin:18px 0}
.gpk-breadcrumb{display:flex;gap:10px;align-items:center;font-size:13px;color:var(--muted)}
.gpk-breadcrumb span{opacity:.6}
.gpk-headgrid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;align-items:start;margin-top:14px}
@media(max-width:980px){.gpk-headgrid{grid-template-columns:1fr}}
.gpk-h1{margin:0 0 8px;font-size:42px;line-height:1.06;letter-spacing:-.6px}
.gpk-h2{margin:0 0 10px;font-size:20px}
.gpk-h3{margin:0 0 10px;font-size:16px}
.gpk-subtitle{margin:0;color:var(--muted);max-width:70ch;line-height:1.6}
.gpk-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.gpk-pill{display:inline-flex;padding:6px 10px;border-radius:999px;background:#eef3ff;border:1px solid #dbe6ff;font-weight:800;font-size:12px}
.gpk-actionsbox{display:flex;flex-direction:column;gap:10px}
.gpk-btn-ghost{background:transparent;border:1px solid rgba(15,23,42,.18);color:var(--ink);box-shadow:none}
.gpk-btn-ghost:hover{border-color:rgba(15,23,42,.35)}

.gpk-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;margin:18px 0}
@media(max-width:980px){.gpk-grid{grid-template-columns:1fr}}
.gpk-content{color:var(--ink);line-height:1.75}
.gpk-muted{color:var(--muted)}
.gpk-help{margin-top:10px;font-size:13px;color:var(--muted)}
.gpk-formula{font-size:18px;font-weight:900;padding:14px;border-radius:14px;background:linear-gradient(180deg,#fff,#f6f8ff);border:1px solid #e6ecff}

.gpk-calc{display:grid;gap:10px}
.gpk-calc input{width:100%;padding:10px 12px;border-radius:14px;border:1px solid var(--line)}
.gpk-result{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;border-radius:14px;background:#f2f7ff;border:1px dashed #a8c4ff;font-size:16px}
.gpk-result b{font-size:22px;color:#0b7a3b}
.gpk-mini{display:grid;gap:8px;margin-top:10px;font-size:14px}
.gpk-filter{margin-top:16px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.gpk-filter select{
  padding:10px 12px;border-radius:14px;border:1px solid var(--line);
  background:#fff;min-width:200px
}
.gpk-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:18px 0}
@media(max-width:1100px){.gpk-cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.gpk-cards{grid-template-columns:1fr}}
.gpk-cardlink a{color:inherit}
.gpk-cardtop{display:flex;justify-content:space-between;gap:10px;align-items:flex-start}
.gpk-pagination{margin:22px 0 30px}
.gpk-pagination .page-numbers{
  display:inline-flex;align-items:center;justify-content:center;
  padding:8px 12px;margin:4px;border-radius:12px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-weight:800
}
.gpk-pagination .page-numbers.current{background:#eef3ff;border-color:#dbe6ff}

.gpk-filter-search{
  padding:10px 12px;border-radius:14px;border:1px solid var(--line);
  background:#fff;min-width:260px;flex:1
}