:root {
  --bg: #0f1419;
  --card: #1a222c;
  --line: #2a3542;
  --text: #e8eef5;
  --muted: #8b9aab;
  --accent: #3dd6c6;
  --accent2: #2aa89b;
  --danger: #ff6b6b;
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(900px 480px at 8% -8%, #1c3340 0%, transparent 60%),
    radial-gradient(700px 400px at 100% 0%, #16302c 0%, transparent 50%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 22px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(15, 20, 25, 0.88);
  z-index: 10;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--accent);
}
.logo {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  background: #122028;
}
nav a { margin-left: 16px; color: var(--muted); }
nav a:hover { color: var(--text); }
main { max-width: 980px; margin: 0 auto; padding: 28px 18px 60px; }
.hero { padding: 42px 0 12px; }
.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  text-transform: uppercase;
}
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); margin: 0 0 12px; letter-spacing: -0.02em; }
.lead { color: var(--muted); line-height: 1.7; max-width: 560px; margin: 0; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.pills { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; }
.pills span {
  font-size: 0.8rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  background: rgba(26, 34, 44, 0.6);
}
.block { margin-top: 44px; }
.block h2 { margin: 0 0 8px; font-size: 1.25rem; }
.section-desc { margin: 0 0 14px; }
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.15s, transform 0.15s;
}
.card:hover { border-color: #3a4b5c; transform: translateY(-2px); }
.card-top { display: flex; align-items: center; gap: 10px; }
.avatar {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: #122028;
  border: 1px solid var(--line);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  flex-shrink: 0;
}
.card h3 { margin: 0; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.92rem; line-height: 1.5; flex: 1; }
.card-meta { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.btn {
  border: 1px solid var(--line);
  background: #243040;
  color: var(--text);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  font: inherit;
}
.btn:hover { filter: brightness(1.08); }
.btn.primary {
  background: linear-gradient(180deg, var(--accent), var(--accent2));
  color: #042018;
  border-color: transparent;
  font-weight: 700;
}
.btn.ghost { background: transparent; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}
.price-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.price-card .btn { align-self: flex-start; margin-top: 6px; }
.price-card.highlight { border-color: var(--accent); box-shadow: 0 0 0 1px rgba(61, 214, 198, 0.25); }
.price { font-size: 1.6rem; font-weight: 800; margin: 4px 0; }
.price span { font-size: 0.9rem; color: var(--muted); font-weight: 500; }
.muted { color: var(--muted); font-size: 0.85rem; }
.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  max-width: 440px;
}
.contact-panel { max-width: 560px; }
.contact-ways { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.contact-chip {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 12px;
  background: #101820;
}
.contact-chip b { display: block; font-size: 0.75rem; color: var(--muted); font-weight: 600; }
.hidden { display: none !important; }
.tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.tab {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 6px 10px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  font: inherit;
}
.tab.on { color: var(--accent); border-bottom-color: var(--accent); }
.form { display: flex; flex-direction: column; gap: 10px; }
.form label { display: flex; flex-direction: column; gap: 4px; font-size: 0.85rem; color: var(--muted); }
.form input, .row input, .row select, textarea, .admin-input {
  background: #101820;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 10px;
  color: var(--text);
  font: inherit;
}
.err { color: var(--danger); min-height: 1.2em; margin: 0; font-size: 0.85rem; }
footer {
  border-top: 1px solid var(--line);
  padding: 16px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}
.badge {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(61, 214, 198, 0.15);
  color: var(--accent);
}
.badge.expired { background: rgba(255, 107, 107, 0.15); color: var(--danger); }
.user-stat {
  display: flex;
  gap: 16px;
  margin: 12px 0;
}
.user-stat div {
  background: #101820;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  min-width: 110px;
}
.user-stat b { display: block; font-size: 1.25rem; margin-top: 4px; }
.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: #243040;
  border: 1px solid var(--line);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  z-index: 50;
  max-width: 90%;
}
.ann-card { margin-bottom: 10px; }
@media (max-width: 640px) {
  nav a { margin-left: 10px; font-size: 0.9rem; }
  .hero { padding-top: 24px; }
}