:root {
  --ink: #edf8f4;
  --muted: rgba(205, 236, 230, 0.55);
  --gold: #e4bd6a;
  --gold-bright: #f5d88c;
  --line: rgba(151, 218, 213, 0.15);
}
* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
  margin: 0; color: var(--ink); min-height: 100vh;
  background:
    radial-gradient(circle at 75% 20%, rgba(68, 160, 183, 0.16), transparent 31%),
    radial-gradient(circle at 18% 82%, rgba(226, 178, 82, 0.09), transparent 28%),
    linear-gradient(140deg, #04151a 0%, #082832 52%, #061a20 100%);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
}
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(139, 213, 214, .04) 1px, transparent 1px), linear-gradient(90deg, rgba(139, 213, 214, .04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.8), transparent 86%);
}
a { color: inherit; text-decoration: none; }
.hub-shell { position: relative; z-index: 1; width: min(1380px, 100%); margin: 0 auto; padding: 24px 30px 28px; }
.hub-top { display: flex; align-items: center; gap: 20px; min-height: 40px; flex-wrap: wrap; }
.hub-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .1em; }
.hub-seal { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; color: #12241f; background: linear-gradient(145deg, #ffe7aa, #d6a43d); font-weight: 900; font-size: 15px; }
.hub-brand small { font-size: 9px; letter-spacing: .2em; color: rgba(191,232,227,.4); font-weight: 400; margin-left: 2px; }
.hub-nav { display: flex; gap: 18px; margin-left: 16px; color: rgba(204,236,230,.48); font-size: 12px; }
.hub-nav b { color: var(--gold); font-weight: 500; }
.hub-domain { margin-left: auto; border: 1px solid var(--line); background: rgba(10,48,53,.5); border-radius: 7px; padding: 7px 11px; color: rgba(190,231,226,.45); font-size: 10px; letter-spacing: .1em; }
.hub-hero { display: grid; grid-template-columns: minmax(0, 1fr) 340px; align-items: center; gap: 20px; padding: 44px 0 30px; }
.hub-kicker { color: var(--gold); font-size: 10px; letter-spacing: .3em; margin-bottom: 11px; }
.hub-hero h1 { margin: 0; font-size: clamp(36px, 5vw, 58px); line-height: 1.08; letter-spacing: .02em; font-weight: 600; }
.hub-hero h1 em { font-style: normal; color: #8fe0d3; }
.hub-hero p { margin: 16px 0 0; max-width: 640px; color: var(--muted); font-size: 14px; line-height: 1.85; }
.hub-hero p b { color: rgba(240,213,141,.82); font-weight: 500; }
.hub-mascot { position: relative; display: flex; justify-content: flex-end; align-items: center; min-height: 260px; }
.hub-mascot::before { content: ""; position: absolute; width: 280px; height: 280px; border-radius: 50%; background: radial-gradient(circle, rgba(74,174,196,.16), transparent 68%); right: 20px; }
.hub-mascot img { position: relative; width: 250px; height: 250px; object-fit: contain; filter: drop-shadow(0 18px 24px rgba(0,0,0,.26)); }
.hub-mascot span { position: absolute; right: 230px; bottom: 18px; background: #f6f0e4; color: #1a2b3a; border-radius: 12px 12px 4px 12px; padding: 10px 12px; font-size: 11px; line-height: 1.5; white-space: nowrap; box-shadow: 0 10px 24px rgba(0,0,0,.15); }
.hub-cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)) minmax(170px, .52fr); gap: 13px; }
.hub-card { position: relative; min-height: 300px; border-radius: 20px; overflow: hidden; border: 1px solid var(--line); background: #0a3038; box-shadow: 0 20px 40px rgba(0,0,0,.16); }
.hub-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .72; transform: scale(1.01); transition: transform .35s; }
.hub-card:hover img { transform: scale(1.045); }
.hub-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(2,16,21,.94), rgba(2,16,21,.16) 62%, transparent); }
.hub-card-copy { position: absolute; left: 19px; right: 18px; bottom: 17px; z-index: 2; }
.hub-card-copy small { color: var(--gold); font-size: 9px; letter-spacing: .16em; }
.hub-card-copy h2 { margin: 5px 0 4px; font-size: 22px; font-weight: 500; }
.hub-card-copy p { margin: 0; color: rgba(207,237,231,.55); font-size: 10px; line-height: 1.5; }
.hub-badge { position: absolute; z-index: 2; top: 13px; left: 13px; padding: 5px 8px; border-radius: 999px; background: rgba(4,20,25,.66); border: 1px solid rgba(151,218,213,.18); color: rgba(207,241,235,.65); font-size: 8px; letter-spacing: .12em; }
.hub-badge.gold { color: var(--gold); border-color: rgba(226,178,82,.25); }
.hub-more { display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; background: linear-gradient(145deg, rgba(16,60,63,.8), rgba(6,29,34,.9)); }
.hub-more .ring { width: 88px; height: 88px; border-radius: 50%; border: 1px dashed rgba(143,224,211,.28); display: grid; place-items: center; margin-bottom: 12px; color: var(--gold); font-size: 24px; }
.hub-more h2 { margin: 0 0 4px; font-size: 16px; font-weight: 500; }
.hub-more p { margin: 0; color: rgba(190,228,222,.38); font-size: 9px; }
.hub-foot { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 18px; color: rgba(177,222,218,.3); font-size: 9px; letter-spacing: .08em; }
.hub-foot b { color: rgba(226,178,82,.45); font-weight: 400; }
@media (max-width: 1100px) {
  .hub-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hub-more { min-height: 190px; }
}
@media (max-width: 900px) {
  .hub-shell { padding: 16px 14px 22px; }
  .hub-nav { display: none; }
  .hub-hero { grid-template-columns: 1fr; padding-top: 30px; }
  .hub-mascot { display: none; }
  .hub-cards { grid-template-columns: 1fr; }
  .hub-card { min-height: 250px; }
  .hub-more { min-height: 170px; }
}
@media (max-width: 560px) {
  .hub-hero h1 { font-size: 34px; }
  .hub-hero p { font-size: 12px; }
  .hub-domain { margin-left: 0; }
  .hub-card { min-height: 220px; }
}