:root {
  --bg: #0b0e1a;
  --bg2: #121729;
  --card: #1a2038;
  --line: #2a3356;
  --text: #e8ecff;
  --muted: #9aa3c7;
  --accent: #00e5ff;
  --accent2: #ff2e88;
  --gold: #ffc940;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 680px; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: 13px; margin-top: 24px; }
.hl { color: var(--gold); }

/* 顶部导航 */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(11,14,26,.88); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { color: var(--text); font-weight: 800; font-size: 18px; display: flex; align-items: center; gap: 8px; }
.logo-mark { background: linear-gradient(135deg, var(--accent), var(--accent2)); border-radius: 8px; width: 32px; height: 32px; display: grid; place-items: center; }
.nav nav a { color: var(--muted); margin-left: 22px; font-size: 15px; }
.nav nav a:hover { color: var(--text); }

/* 首屏 */
.hero {
  text-align: center; padding: 90px 0 80px;
  background:
    radial-gradient(ellipse at 20% 0%, rgba(0,229,255,.22), transparent 55%),
    radial-gradient(ellipse at 85% 30%, rgba(255,46,136,.22), transparent 55%),
    linear-gradient(transparent 95%, rgba(0,229,255,.06) 95%) 0 0 / 100% 40px,
    var(--bg);
}
.tag { display: inline-block; border: 1px solid var(--accent); color: var(--accent); padding: 4px 14px; border-radius: 99px; font-size: 14px; letter-spacing: 1px; }
.hero h1 { font-size: clamp(38px, 7vw, 68px); line-height: 1.2; margin: 22px 0 16px; font-weight: 900; }
.glow { background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--muted); font-size: 18px; max-width: 620px; margin: 0 auto; }
.lead b { color: var(--gold); }
.countdown { display: flex; justify-content: center; gap: 14px; margin: 36px 0 8px; }
.countdown div { background: var(--card); border: 1px solid var(--line); border-radius: 12px; width: 76px; padding: 10px 0; }
.countdown b { display: block; font-size: 30px; font-variant-numeric: tabular-nums; color: var(--accent); }
.countdown span { font-size: 13px; color: var(--muted); }
.cd-tip { color: var(--muted); font-size: 14px; }
.hero-btns { margin-top: 30px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-stat { margin-top: 20px; color: var(--muted); }
.hero-stat b { color: var(--accent2); font-size: 20px; }

.btn { display: inline-block; padding: 13px 34px; border-radius: 10px; font-size: 17px; font-weight: 700; cursor: pointer; border: 0; transition: transform .15s, box-shadow .15s; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: linear-gradient(90deg, var(--accent), var(--accent2)); color: #fff; box-shadow: 0 6px 24px rgba(255,46,136,.35); }
.btn-ghost { border: 1px solid var(--line); color: var(--text); background: var(--card); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.block { width: 100%; }

/* 通用区块 */
.section { padding: 80px 0; }
.section.alt { background: var(--bg2); }
.title { text-align: center; font-size: 32px; margin-bottom: 14px; }
.title::after { content: ""; display: block; width: 60px; height: 4px; margin: 12px auto 0; border-radius: 2px; background: linear-gradient(90deg, var(--accent), var(--accent2)); }
.sub { font-size: 22px; margin: 50px 0 20px; border-left: 4px solid var(--accent); padding-left: 12px; }

.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin-top: 30px; }
.info { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; }
.info span { font-size: 28px; }
.info h3 { font-size: 17px; margin: 6px 0; }
.info p { color: var(--muted); font-size: 15px; }

/* 比赛项目 */
.games { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 16px; }
.game { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; text-align: center; transition: border-color .2s; }
.game:hover { border-color: var(--accent); }
.game-icon { font-size: 36px; }
.game h4 { font-size: 18px; margin: 6px 0; }
.game p { color: var(--muted); font-size: 14px; }
.bar { height: 6px; background: var(--line); border-radius: 3px; margin: 14px 0 6px; overflow: hidden; }
.bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent2)); transition: width .6s; }
.left { color: var(--muted); font-size: 12px; }
.game-go { display: inline-block; margin-top: 10px; font-size: 14px; }

/* 奖金 */
.prizes { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.prize { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px; text-align: center; }
.prize em { font-style: normal; color: var(--muted); }
.prize b { display: block; font-size: 30px; margin: 6px 0; }
.prize p { color: var(--muted); font-size: 14px; }
.prize.gold { border-color: var(--gold); } .prize.gold b { color: var(--gold); }
.prize.silver b { color: #d6dcf0; }
.prize.bronze b { color: #e39a5b; }

.rules { list-style: none; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px 24px; }
.rules li { padding: 6px 0 6px 24px; position: relative; color: var(--muted); }
.rules li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); }

/* 表单 */
.form { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 30px; margin-top: 28px; }
.form label { display: block; font-size: 15px; margin-bottom: 18px; }
.form label i { color: var(--accent2); font-style: normal; }
.form input, .form select, .form textarea {
  display: block; width: 100%; margin-top: 6px; padding: 12px 14px; font-size: 16px; font-family: inherit;
  background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 10px; outline: none;
}
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--accent); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.msg { margin-top: 16px; text-align: center; min-height: 24px; }
.msg.ok { color: #4dff9a; }
.msg.err { color: #ff6b8a; }

/* 充值 */
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; margin-top: 34px; }
.plan { position: relative; background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 28px 22px; text-align: center; overflow: hidden; }
.plan h3 { color: var(--muted); font-size: 16px; font-weight: 500; }
.plan .price { font-size: 18px; margin: 10px 0 4px; }
.plan .price b { font-size: 44px; color: var(--text); }
.plan .bonus { display: inline-block; background: rgba(255,46,136,.15); color: var(--accent2); font-weight: 800; font-size: 20px; padding: 4px 16px; border-radius: 99px; }
.plan ul { list-style: none; margin-top: 16px; color: var(--muted); font-size: 14px; }
.plan li { padding: 3px 0; }
.plan.hot { border: 2px solid var(--accent2); box-shadow: 0 0 34px rgba(255,46,136,.25); }
.ribbon { position: absolute; top: 16px; right: -34px; transform: rotate(45deg); background: var(--accent2); color: #fff; font-size: 12px; padding: 3px 38px; }
.extras { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 26px; }
.extra { background: linear-gradient(135deg, rgba(0,229,255,.08), rgba(255,46,136,.08)); border: 1px dashed var(--line); border-radius: 14px; padding: 18px 20px; }
.extra b { font-size: 17px; }
.extra p { color: var(--muted); font-size: 14px; margin-top: 4px; }

.footer { text-align: center; color: var(--muted); font-size: 13px; padding: 30px 0 90px; border-top: 1px solid var(--line); }

.float-btn { display: none; position: fixed; right: 16px; bottom: 20px; z-index: 20; width: 62px; height: 62px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; font-weight: 800; place-items: center; box-shadow: 0 6px 20px rgba(255,46,136,.5); }

@media (max-width: 640px) {
  .nav nav a { margin-left: 12px; font-size: 14px; }
  .nav nav a:nth-child(4) { display: none; }
  .logo { font-size: 16px; }
  .hero { padding: 60px 0 56px; }
  .lead { font-size: 16px; }
  .countdown { gap: 8px; }
  .countdown div { width: 64px; }
  .section { padding: 56px 0; }
  .title { font-size: 26px; }
  .row { grid-template-columns: 1fr; gap: 0; }
  .form { padding: 22px 18px; }
  .float-btn { display: grid; }
}