:root {
  --bg: #0b1220;
  --bg-soft: #101a2e;
  --panel: #141f36;
  --line: #22304d;
  --text: #e8eefb;
  --muted: #93a3c4;
  --accent: #3b82f6;
  --accent-2: #22d3ee;
  --warn: #fbbf24;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, #14264a 0%, var(--bg) 55%);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: min(1080px, 92%); margin: 0 auto; }

.topbar {
  border-bottom: 1px solid var(--line);
  background: rgba(11, 18, 32, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 20px; }
.brand:hover { text-decoration: none; }
.brand-logo { width: 34px; height: 34px; }
.nav { display: flex; gap: 22px; align-items: center; }
.nav a { color: var(--muted); font-size: 15px; }
.nav a:hover { color: var(--text); text-decoration: none; }
.nav a.nav-active { color: var(--accent-2); }
.nav a.nav-disabled { color: #64748b; }
.badge-closed {
  margin-left: 6px; font-size: 11px; padding: 2px 7px; border-radius: 999px;
  background: rgba(251, 191, 36, 0.14); color: var(--warn); border: 1px solid rgba(251, 191, 36, 0.4);
  vertical-align: middle;
}

main { flex: 1; }

.hero { padding: 96px 0 72px; text-align: center; }
.hero h1 { font-size: clamp(30px, 5vw, 52px); font-weight: 800; letter-spacing: 0.5px; }
.hero-accent {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub { margin-top: 14px; color: var(--muted); font-size: 18px; }
.hero-stats { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; margin-top: 48px; }
.stat { min-width: 130px; }
.stat b { display: block; font-size: 30px; color: var(--accent-2); font-weight: 800; }
.stat span { color: var(--muted); font-size: 14px; }

.section { padding: 64px 0; }
.section-alt { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section h2 { font-size: 28px; margin-bottom: 8px; }
.section-desc { color: var(--muted); margin-bottom: 32px; max-width: 720px; }
.section-contact { margin-top: 28px; color: var(--muted); }

.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px;
  position: relative;
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card-tag {
  display: inline-block; font-size: 12px; color: var(--accent-2);
  border: 1px solid rgba(34, 211, 238, 0.4); background: rgba(34, 211, 238, 0.08);
  padding: 2px 9px; border-radius: 999px; margin-bottom: 10px;
}
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14px; margin-bottom: 26px; }
.card-status {
  position: absolute; right: 18px; bottom: 16px;
  font-size: 12px; color: var(--warn); border: 1px solid rgba(251, 191, 36, 0.4);
  padding: 2px 9px; border-radius: 999px; background: rgba(251, 191, 36, 0.08);
}

.cta-box { text-align: center; padding: 40px 0; }
.cta-box h2 { margin-bottom: 10px; }
.cta-box p { color: var(--muted); margin-bottom: 22px; }

.btn {
  display: inline-block;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #06121f; font-weight: 700; font-size: 15px;
  padding: 11px 26px; border-radius: 10px; border: none; cursor: pointer;
}
.btn:hover { filter: brightness(1.1); text-decoration: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-block { display: block; width: 100%; margin-top: 18px; }

.footer { border-top: 1px solid var(--line); padding: 22px 0; text-align: center; color: var(--muted); font-size: 14px; }
.footer-muted { margin-top: 4px; font-size: 12px; color: #5b6b8c; }

/* auth pages */
.auth-body { justify-content: flex-start; }
.auth-main { display: flex; align-items: center; justify-content: center; padding: 60px 0; flex: 1; }
.auth-card {
  width: min(420px, 92%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 36px 34px;
}
.auth-logo { width: 60px; height: 60px; display: block; margin: 0 auto 14px; }
.auth-card h1 { text-align: center; font-size: 24px; }
.auth-sub { text-align: center; color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.auth-card label { display: block; margin: 14px 0 6px; font-size: 14px; color: var(--muted); }
.auth-card input {
  width: 100%; padding: 11px 13px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--bg-soft); color: var(--text); font-size: 15px;
}
.auth-card input:focus { outline: none; border-color: var(--accent); }
.auth-card input:disabled { opacity: 0.55; }
.captcha-row { display: flex; gap: 10px; }
.captcha-row input { flex: 1; min-width: 0; }
#captchaCanvas {
  border: 1px solid var(--line); border-radius: 9px; cursor: pointer;
  background: #0d1526; flex: 0 0 120px;
}
.auth-foot { text-align: center; margin-top: 20px; color: var(--muted); font-size: 14px; }
.closed-banner {
  display: flex; flex-direction: column; gap: 6px;
  border: 1px solid rgba(251, 191, 36, 0.45);
  background: rgba(251, 191, 36, 0.08);
  border-radius: 12px; padding: 14px 16px; margin-bottom: 10px;
  color: var(--warn); font-size: 14px;
}
.closed-banner span { color: var(--muted); }
fieldset { border: none; }
.form-msg { margin-top: 14px; font-size: 14px; text-align: center; color: var(--warn); min-height: 20px; }