:root {
  color-scheme: dark;
  --ink: #031c25;
  --panel: rgba(4, 35, 45, .86);
  --mint: #55f3c2;
  --cyan: #45dfff;
  --yellow: #ffe42f;
  --pink: #ff4da6;
  --text: #f5ffff;
  --muted: #a8c9ce;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: #02141d url('/assets/arena.png') center top / cover fixed;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}
body::before { content: ""; position: fixed; inset: 0; z-index: -1; background: linear-gradient(180deg, rgba(1,13,21,.28), #02131ce8 58%, #020b12); }
a { color: inherit; }
.wrap { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
nav { position: sticky; top: 0; z-index: 10; background: rgba(1, 17, 24, .82); border-bottom: 1px solid rgba(85,243,194,.28); backdrop-filter: blur(18px); }
.nav-inner { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 900; letter-spacing: .06em; }
.brand img { width: 42px; height: 42px; border-radius: 11px; }
.nav-links { display: flex; align-items: center; gap: 24px; color: var(--muted); font-size: 14px; }
.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--mint); }
.hero { min-height: 760px; display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 42px; padding: 90px 0 70px; }
.eyebrow { color: var(--yellow); font-weight: 900; letter-spacing: .18em; font-size: 13px; }
h1 { margin: 12px 0 18px; font-size: clamp(48px, 7vw, 82px); line-height: .98; letter-spacing: -.04em; }
.gradient { background: linear-gradient(105deg, #fff 6%, var(--cyan) 52%, var(--mint)); -webkit-background-clip: text; color: transparent; }
.lead { max-width: 640px; color: #d5eef1; font-size: clamp(18px, 2vw, 23px); }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 26px; text-decoration: none; font-weight: 900; clip-path: polygon(8% 0, 100% 0, 91% 100%, 0 100%); }
.button.primary { color: #041c25; background: linear-gradient(90deg, var(--yellow), #baff3c); }
.button.secondary { color: var(--text); border: 2px solid var(--mint); background: rgba(2,30,40,.7); }
.hero-art { position: relative; display: grid; place-items: center; min-height: 520px; }
.hero-art::before, .hero-art::after { content: ""; position: absolute; background: var(--mint); filter: drop-shadow(0 0 16px var(--cyan)); clip-path: polygon(0 38%, 58% 38%, 48% 0, 100% 52%, 63% 52%, 72% 100%); }
.hero-art::before { width: 84%; height: 62%; opacity: .26; transform: rotate(-8deg); }
.hero-art::after { width: 58%; height: 38%; opacity: .16; transform: rotate(168deg); }
.hero-art img { position: relative; z-index: 1; width: min(520px, 100%); filter: drop-shadow(0 22px 52px #02050b); border-radius: 28px; }
section { padding: 76px 0; }
.section-title { max-width: 760px; margin-bottom: 34px; }
h2 { margin: 8px 0; font-size: clamp(34px, 5vw, 52px); line-height: 1.1; }
.section-title p, .muted { color: var(--muted); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { min-height: 220px; padding: 28px; background: var(--panel); border: 1px solid rgba(85,243,194,.25); clip-path: polygon(0 0, 94% 0, 100% 14%, 100% 100%, 6% 100%, 0 86%); box-shadow: inset 0 0 38px rgba(69,223,255,.045); }
.card strong { display: block; font-size: 24px; margin: 12px 0 8px; }
.card p { color: var(--muted); margin: 0; }
.number { font-size: 42px; font-weight: 950; color: var(--yellow); font-style: italic; line-height: 1; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; border: 1px solid rgba(85,243,194,.25); background: rgba(85,243,194,.25); }
.stat { padding: 26px 18px; background: #041f29; text-align: center; }
.stat b { display: block; font-size: 30px; color: var(--mint); }
.cta { padding: 44px; background: linear-gradient(115deg, rgba(28,61,88,.96), rgba(9,38,47,.96)); border: 2px solid var(--cyan); clip-path: polygon(3% 0, 100% 0, 96% 100%, 0 100%); text-align: center; }
.cta h2 { margin-top: 0; }
.legal { max-width: 860px; padding: 64px 0 100px; }
.legal h1 { font-size: clamp(40px, 6vw, 64px); }
.legal h2 { margin-top: 42px; font-size: 26px; color: var(--mint); }
.legal p, .legal li { color: #cee2e5; }
.legal .notice { padding: 20px 24px; border-left: 4px solid var(--yellow); background: rgba(4,35,45,.82); }
footer { padding: 30px 0; border-top: 1px solid rgba(85,243,194,.2); color: var(--muted); font-size: 13px; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 18px; }
@media (max-width: 820px) {
  .nav-links a:not(:last-child) { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 54px; }
  .hero-art { min-height: 360px; }
  .grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  section { padding: 54px 0; }
}