/* 天纪命理 · 推广运营站 · 样式
   ------------------------------------------------------------------
   设计 tokens 与 App 一致：朱砂 #d2453b / 墨 #2b241c / 纸 #faf8f3
   字体：正文用系统无衬线，标题用宋体（serif）营造传统气质。 */

:root {
  --cinnabar: #d2453b;
  --cinnabar-deep: #a9322a;
  --ink: #2b241c;
  --ink-soft: #6b6155;
  --paper: #faf8f3;
  --paper-deep: #f1ecdf;
  --gold: #9a6b2f;
  --jade: #3f7d6e;
  --line: rgba(43, 36, 28, 0.1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.serif { font-family: 'Noto Serif SC', 'Songti SC', 'SimSun', serif; }

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

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 22px; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 248, 243, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; height: 60px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 600; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--cinnabar); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: 'Noto Serif SC', serif; font-size: 16px;
}
.nav-links { display: flex; gap: 18px; margin-left: auto; font-size: 14px; color: var(--ink-soft); }
.nav-links a:hover { color: var(--cinnabar); }
.nav-cta {
  background: var(--cinnabar); color: #fff;
  padding: 8px 18px; border-radius: 999px; font-size: 14px; font-weight: 500;
}
.nav-cta:hover { background: var(--cinnabar-deep); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, #2c2417 0%, #4a3b22 100%);
  color: #f3e6cf; text-align: center;
  padding: 88px 22px 72px;
  position: relative; overflow: hidden;
}
.hero::after {
  content: '☰'; position: absolute; right: -40px; top: -40px;
  font-size: 320px; opacity: 0.06; color: #fff; font-family: serif;
  transform: rotate(15deg); pointer-events: none;
}
.hero .serif { color: #fff; }
.hero-kicker { letter-spacing: 0.4em; font-size: 13px; opacity: 0.75; margin-bottom: 18px; }
.hero h1 { font-size: 46px; line-height: 1.25; margin-bottom: 16px; font-weight: 600; }
.hero .tagline { font-size: 22px; color: var(--gold); margin-bottom: 14px; }
.hero p.desc { font-size: 16px; opacity: 0.85; max-width: 560px; margin: 0 auto 30px; }
.hero-cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: 999px; font-size: 16px; font-weight: 500;
  transition: transform 0.15s, background 0.15s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--cinnabar); color: #fff; }
.btn-primary:hover { background: var(--cinnabar-deep); }
.btn-ghost { border: 1px solid rgba(243, 230, 207, 0.5); color: #f3e6cf; }
.btn-ghost:hover { background: rgba(243, 230, 207, 0.12); }
.hero-trust {
  display: flex; gap: 26px; justify-content: center; flex-wrap: wrap;
  margin-top: 40px; font-size: 13px; opacity: 0.85;
}
.hero-trust span::before { content: '✓ '; color: var(--gold); font-weight: 700; }

/* ---------- 通用 section ---------- */
.section { padding: 72px 0; }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head .kicker { color: var(--cinnabar); font-size: 13px; letter-spacing: 0.2em; margin-bottom: 10px; }
.section-head h2 { font-size: 32px; font-weight: 600; margin-bottom: 12px; }
.section-head p { color: var(--ink-soft); max-width: 560px; margin: 0 auto; }

/* ---------- 卖点网格 ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  padding: 26px 22px;
}
.card .icon { font-size: 30px; margin-bottom: 14px; }
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { font-size: 14px; color: var(--ink-soft); }

/* ---------- 流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 20px; }
.step { text-align: center; padding: 26px 18px; }
.step .num {
  width: 44px; height: 44px; margin: 0 auto 16px; border-radius: 50%;
  background: var(--paper-deep); color: var(--cinnabar);
  font-family: serif; font-size: 22px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--ink-soft); }

/* ---------- 免费/付费 ---------- */
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 760px; margin: 0 auto; }
.plan { border-radius: 18px; padding: 30px 26px; }
.plan-free { background: #fff; border: 1px solid var(--line); }
.plan-paid { background: linear-gradient(160deg, #2c2417, #4a3b22); color: #f3e6cf; }
.plan h3 { font-size: 20px; margin-bottom: 6px; }
.plan .price { font-size: 30px; font-weight: 700; margin-bottom: 18px; font-family: serif; }
.plan .price small { font-size: 14px; font-weight: 400; opacity: 0.7; }
.plan ul { list-style: none; margin-bottom: 22px; }
.plan li { font-size: 14px; padding: 5px 0; padding-left: 22px; position: relative; }
.plan li::before { content: '✓'; position: absolute; left: 0; color: var(--jade); font-weight: 700; }
.plan-paid li::before { color: var(--gold); }
.plan .btn { width: 100%; }

/* ---------- FAQ ---------- */
.faq { max-width: 720px; margin: 0 auto; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 12px; }
.faq summary { padding: 16px 20px; cursor: pointer; font-weight: 500; font-size: 15px; list-style: none; }
.faq summary::after { content: '+'; float: right; color: var(--cinnabar); font-weight: 700; }
.faq details[open] summary::after { content: '−'; }
.faq .faq-body { padding: 0 20px 18px; font-size: 14px; color: var(--ink-soft); }

/* ---------- 最终 CTA ---------- */
.final-cta { background: var(--cinnabar); color: #fff; text-align: center; padding: 68px 22px; }
.final-cta h2 { font-size: 30px; margin-bottom: 12px; }
.final-cta p { opacity: 0.9; margin-bottom: 26px; }
.final-cta .btn { background: #fff; color: var(--cinnabar); }

/* ---------- 页脚 ---------- */
.footer { background: #201a12; color: #b8ad9c; padding: 44px 0 30px; font-size: 13px; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 24px; }
.footer a { color: #d8cdb8; }
.footer a:hover { color: #fff; }
.footer .disc { margin-top: 22px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 12px; opacity: 0.7; line-height: 1.8; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .hero h1 { font-size: 34px; }
  .hero .tagline { font-size: 18px; }
  .nav-links { display: none; }
  .plans { grid-template-columns: 1fr; }
  .section { padding: 52px 0; }
  /* 32px 在 390 宽下放不下「一套完整的《天纪》工具」，末字被挤出视口 */
  .section-head h2 { font-size: 26px; }
  .section-head { margin-bottom: 34px; }
}