:root {
  --bg: #071510;
  --bg-2: #0c241c;
  --ink: #f4efe2;
  --muted: #b7c4b8;
  --gold: #d4b56a;
  --gold-2: #f0ddaa;
  --line: rgba(212, 181, 106, 0.28);
  --black: #070707;
  --danger: #e8c07a;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif SC", serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input { font: inherit; }

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 6vw;
  background: rgba(7, 21, 16, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-brand {
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0.08em;
  color: var(--gold-2);
}
.nav-brand span { margin: 0 0.25em; color: var(--gold); }
.nav-links { display: flex; gap: 22px; font-size: 14px; color: var(--muted); }
.nav-links a:hover { color: var(--gold-2); }

.hero {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  min-height: calc(100vh - 56px);
  align-items: stretch;
}
.hero-copy {
  padding: 8vh 6vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    radial-gradient(1200px 400px at 0% 0%, rgba(212, 181, 106, 0.12), transparent 50%),
    linear-gradient(180deg, #0a1f28, var(--bg));
}
.eyebrow {
  margin: 0 0 12px;
  letter-spacing: 0.28em;
  font-size: 12px;
  color: var(--gold);
  text-transform: none;
}
.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(56px, 8vw, 92px);
  font-weight: 700;
  color: var(--gold-2);
  letter-spacing: 0.12em;
}
.slogan {
  margin: 8px 0 20px;
  font-size: 22px;
  color: var(--ink);
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 28px; }
.hero-tags span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 13px;
  color: var(--gold-2);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero-visual { overflow: hidden; background: #081410; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-gold { background: var(--gold); color: #1a1408; font-weight: 600; }
.btn-gold:hover { background: var(--gold-2); }
.btn-ghost { border-color: var(--line); color: var(--gold-2); }
.btn-ghost:hover { border-color: var(--gold); }
.btn-block { width: 100%; margin-top: 8px; }
.btn[disabled] { opacity: 0.55; cursor: not-allowed; }

.warn {
  margin: 28px 0 0;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--danger);
}

.section { padding: 72px 6vw; }
.section-head { max-width: 720px; margin-bottom: 36px; }
.section-head h2, .brand-meta h3, .join-box h2 {
  font-family: var(--serif);
  letter-spacing: 0.08em;
}
.section-head h2 { margin: 0 0 10px; font-size: 32px; }
.lead { margin: 0; color: var(--muted); }

.brand-block { margin-bottom: 48px; }
.brand-block--dark {
  padding: 28px;
  background: linear-gradient(180deg, #0b0b0b, #14110c);
  border: 1px solid rgba(212, 181, 106, 0.16);
}
.brand-meta { margin-bottom: 18px; }
.brand-meta h3 { margin: 0 0 6px; font-size: 28px; color: var(--gold-2); }
.brand-meta p { margin: 0; color: var(--muted); }
.cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.card {
  background: #0a1a16;
  border: 1px solid var(--line);
  overflow: hidden;
}
.card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.card-body { padding: 14px 16px 18px; }
.card-body h4 { margin: 0 0 4px; font-size: 16px; }
.card-body p { margin: 0; color: var(--muted); font-size: 14px; }

.section--mode { background: var(--bg-2); }
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.steps li {
  padding: 22px 18px;
  border: 1px solid var(--line);
  background: rgba(7, 21, 16, 0.5);
}
.steps span {
  display: block;
  font-family: var(--serif);
  color: var(--gold);
  font-size: 20px;
  margin-bottom: 10px;
}
.steps h3 { margin: 0 0 8px; font-size: 18px; }
.steps p { margin: 0; color: var(--muted); font-size: 14px; }

.section--join { background: linear-gradient(180deg, #0a1f28, var(--bg)); }
.join-row {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: stretch;
}
.join-col,
.mp-col {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.join-col .section-head,
.mp-col .section-head { max-width: none; margin-bottom: 20px; }
.join-box,
.mp-card {
  flex: 1;
  padding: 24px;
  border: 1px solid var(--line);
  background: rgba(7, 21, 16, 0.65);
}
.mp-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 320px;
  gap: 18px;
}
.mp-card p { margin: 0; color: var(--muted); }
.tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.tab {
  flex: 1;
  min-height: 40px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.tab.is-on { background: var(--gold); color: #1a1408; border-color: var(--gold); font-weight: 600; }
.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }
.form input {
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  background: #071510;
  color: var(--ink);
  outline: none;
}
.form input:focus { border-color: var(--gold); }
.store-fields { display: none; gap: 14px; }
.store-fields.is-show { display: grid; }
.form-msg { min-height: 1.4em; margin: 0; font-size: 14px; }
.form-msg.is-ok { color: #8fd19e; }
.form-msg.is-err { color: #f0b4a0; }

.qr {
  width: 180px;
  height: 180px;
  padding: 8px;
  background: #fff;
  flex-shrink: 0;
  border-radius: 8px;
}
.qr img { width: 100%; height: 100%; object-fit: contain; }
.muted { color: var(--muted); font-size: 13px; }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--gold-2); }
code { color: var(--gold-2); }

.footer {
  padding: 32px 6vw 48px;
  border-top: 1px solid var(--line);
  text-align: center;
}
.footer .warn { margin: 0 0 10px; }
.footer p { margin: 4px 0; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-visual { height: 42vh; }
  .cards, .steps { grid-template-columns: 1fr; }
  .nav-links { gap: 12px; font-size: 13px; }
  .join-row { grid-template-columns: 1fr; }
  .mp-card { min-height: 0; }
}