:root {
  --bg: #0A1628;
  --gold: #D4A830;
  --gold-bright: #F5A623;
  --ivory: #F7F4EC;
  --ink: #1A1A1A;
  --line: rgba(212, 168, 48, 0.35);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ivory);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
a { color: var(--gold-bright); }

/* 导航 */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px;
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-logo { font-size: 1.1rem; font-weight: 700; color: var(--gold); text-decoration: none; display: flex; align-items: center; gap: 8px; letter-spacing: 0.05em; }
.nav-logo-dot { width: 6px; height: 6px; background: var(--gold-bright); border-radius: 50%; box-shadow: 0 0 10px rgba(245, 166, 35, 0.6); }
.nav-links { display: flex; gap: 16px; align-items: center; }
.nav-links a { color: var(--ivory); text-decoration: none; font-size: 0.9rem; opacity: 0.85; }
.nav-links a:hover { opacity: 1; }
.nav-cta {
  background: var(--gold-bright); color: var(--bg) !important;
  padding: 6px 14px; border-radius: 20px; font-weight: 600;
}

/* 通用 section */
.section { padding: 64px 20px; max-width: 1100px; margin: 0 auto; }
.section-light { background: var(--ivory); color: var(--ink); max-width: none; }
.section-light .section-sub { color: #555; }
.section-title {
  font-size: 1.7rem; text-align: center; margin-bottom: 12px;
  letter-spacing: 0.03em;
}
.section-sub { text-align: center; color: rgba(247, 244, 236, 0.75); margin-bottom: 40px; font-size: 1rem; }
.center { text-align: center; }

/* Hero */
.hero { text-align: center; padding: 90px 20px 70px; max-width: 800px; margin: 0 auto; }
.hero-tag {
  display: inline-block; border: 1px solid var(--line); border-radius: 20px;
  padding: 4px 16px; font-size: 0.85rem; color: var(--gold); margin-bottom: 24px;
}
.hero-title {
  font-size: 3rem; line-height: 1.25; margin-bottom: 20px;
  background: linear-gradient(120deg, var(--gold-bright), #FFE8A3, var(--gold));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  letter-spacing: 0.06em;
}
.hero-sub { font-size: 1.1rem; color: rgba(247, 244, 236, 0.9); margin-bottom: 10px; }
.hero-desc { color: rgba(247, 244, 236, 0.7); margin-bottom: 32px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* 按钮 */
.btn {
  display: inline-block; padding: 13px 30px; border-radius: 28px;
  font-size: 1rem; font-weight: 600; text-decoration: none; cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.btn:hover { transform: translateY(-2px); }
.btn-gold { background: linear-gradient(120deg, var(--gold-bright), var(--gold)); color: #1a1206; box-shadow: 0 6px 20px rgba(245, 166, 35, 0.35); }
.btn-ghost { border: 1px solid var(--gold); color: var(--gold); background: transparent; }
.btn-line { border: 1px solid var(--line); color: var(--gold); background: transparent; padding: 10px 24px; }

/* 认识光尘阁 */
.about-grid { display: grid; grid-template-columns: 1fr; gap: 20px; margin-bottom: 24px; }
.about-card {
  background: rgba(247, 244, 236, 0.05);
  border: 1px solid var(--line); border-radius: 14px; padding: 28px;
}
.about-card h3 { color: var(--gold-bright); font-size: 1.1rem; margin-bottom: 10px; }
.about-card p { font-size: 0.95rem; color: rgba(247, 244, 236, 0.85); }
.about-more { font-size: 0.9rem; color: rgba(247, 244, 236, 0.6); }

/* AI 工具 / 训练营入口 */
.tool-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
.tool-card { background: #fff; border: 1px solid #e5ddcc; border-radius: 14px; padding: 28px; }
.tool-card h3 { margin-bottom: 6px; }
.tool-price { color: var(--gold); font-size: 1.3rem; font-weight: 700; margin: 8px 0; }
.tool-card p:last-of-type { font-size: 0.92rem; color: #555; margin-bottom: 16px; }

/* 定价 */
.pricing-grid { display: grid; grid-template-columns: 1fr; gap: 20px; margin-bottom: 24px; }
.price-card {
  position: relative; background: rgba(247, 244, 236, 0.05);
  border: 1px solid var(--line); border-radius: 16px; padding: 32px 24px;
  display: flex; flex-direction: column;
}
.price-card h3 { font-size: 1.15rem; margin-bottom: 10px; color: var(--ivory); }
.price { font-size: 2rem; font-weight: 700; color: var(--gold-bright); margin-bottom: 4px; }
.price span { font-size: 0.95rem; font-weight: 400; color: rgba(247, 244, 236, 0.6); }
.price-sub { color: var(--gold); font-size: 0.95rem; margin-bottom: 8px; }
.price-card ul { list-style: none; margin: 14px 0 18px; flex: 1; }
.price-card li { padding: 6px 0; font-size: 0.9rem; color: rgba(247, 244, 236, 0.85); }
.price-card li::before { content: "✓ "; color: var(--gold); }
.price-kind { font-size: 0.8rem; color: rgba(247, 244, 236, 0.5); margin-bottom: 14px; }
.price-hot {
  border: 2px solid var(--gold-bright);
  background: linear-gradient(160deg, rgba(245,166,35,0.14), rgba(10,22,40,0.6));
  box-shadow: 0 10px 36px rgba(245, 166, 35, 0.22);
}
.hot-badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--gold-bright); color: #1a1206;
  font-size: 0.8rem; font-weight: 700; padding: 3px 14px; border-radius: 14px;
}
.price-anchor { border-style: dashed; opacity: 0.85; }
.pricing-note { text-align: center; font-size: 0.85rem; color: rgba(247, 244, 236, 0.55); }

/* 训练营 */
.camp-grid { display: grid; grid-template-columns: 1fr; gap: 20px; margin-bottom: 28px; }
.camp-step { background: #fff; border: 1px solid #e5ddcc; border-radius: 14px; padding: 28px; }
.camp-week { font-size: 0.8rem; font-weight: 700; color: var(--gold); margin-bottom: 8px; letter-spacing: 0.05em; }
.camp-step h3 { margin-bottom: 10px; font-size: 1.15rem; }
.camp-step p:last-child { font-size: 0.92rem; color: #555; }
.camp-features { max-width: 520px; margin: 0 auto 32px; }
.camp-features p { padding: 6px 0; font-size: 0.95rem; color: #444; }

/* 反馈 */
.feedback-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
.feedback-card {
  border-radius: 14px; padding: 24px; min-height: 120px;
  border: 1px dashed var(--line);
}
.feedback-card.placeholder { display: flex; align-items: center; justify-content: center; color: #999; font-size: 0.9rem; background: #f3efe6; }

/* 线下 */
.offline-grid { display: grid; grid-template-columns: 1fr; gap: 20px; max-width: 760px; margin: 0 auto 24px; }
.offline-card { background: #fff; border: 1px solid #e5ddcc; border-radius: 14px; padding: 28px; }
.offline-card h3 { margin-bottom: 6px; }
.offline-card .price { color: var(--gold); font-size: 1.5rem; margin: 10px 0; }
.offline-card p:last-child { font-size: 0.92rem; color: #555; }
.offline-note { text-align: center; font-size: 0.9rem; color: #777; }

/* 加入 */
.join-grid { display: flex; flex-direction: column; align-items: center; gap: 36px; max-width: 640px; margin: 0 auto; }
.join-qr { text-align: center; }
.qrcode { width: 168px; height: 168px; border-radius: 10px; display: block; margin: 0 auto; }
.qr-label { margin-top: 12px; font-size: 0.95rem; font-weight: 600; color: var(--gold-bright); }
.join-note { text-align: center; font-size: 0.92rem; color: rgba(247, 244, 236, 0.75); margin-top: 30px; }

/* Footer */
.footer { text-align: center; padding: 50px 20px 40px; border-top: 1px solid var(--line); }
.footer-brand { font-size: 1.05rem; color: var(--gold); font-weight: 600; margin-bottom: 8px; }
.footer p { font-size: 0.88rem; color: rgba(247, 244, 236, 0.6); margin-bottom: 8px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; margin: 16px 0; }
.footer-links a { font-size: 0.88rem; color: rgba(247, 244, 236, 0.8); text-decoration: none; }
.footer-links a:hover { color: var(--gold-bright); }
.footer-meta { font-size: 0.75rem !important; color: rgba(247, 244, 236, 0.4) !important; }

/* 桌面端 */
@media (min-width: 720px) {
  .about-grid { grid-template-columns: repeat(3, 1fr); }
  .tool-grid { grid-template-columns: 1fr 1fr; }
  .feedback-grid { grid-template-columns: repeat(3, 1fr); }
  .offline-grid { grid-template-columns: 1fr 1fr; }
  .camp-grid { grid-template-columns: repeat(4, 1fr); }
  .section { padding: 88px 32px; }
  .hero { padding: 120px 20px 100px; }
  .hero-title { font-size: 4rem; }
  .join-grid { flex-direction: row; justify-content: center; gap: 64px; }
  .pricing-grid { grid-template-columns: repeat(5, 1fr); gap: 14px; }
  .price-card { padding: 26px 16px; }
  .price { font-size: 1.6rem; }
  .price-card li { font-size: 0.82rem; }
}
@media (min-width: 1024px) {
  .pricing-grid { gap: 20px; }
  .price-card { padding: 32px 20px; }
  .price { font-size: 1.9rem; }
  .price-card li { font-size: 0.88rem; }
}