/* 拓迹 · 户外挑战平台 官网样式
   纯语义化、响应式、无外部依赖，便于爬虫与 AI 解析 */

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

:root {
  --gold: #FFD400;
  --gold-dark: #c5a604;
  --ink: #1B1C1C;
  --ink-soft: #4D4732;
  --muted: #666;
  --line: #e8e3d6;
  --bg: #FBF9F8;
  --card: #ffffff;
  --radius: 16px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
}

/* ===== 头部导航 ===== */
header.site-nav {
  background: var(--gold);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.08);
}
.site-nav .inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.site-nav .brand {
  font-weight: 800;
  font-size: 22px;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.site-nav .brand img { height: 30px; width: auto; display: block; }
.site-nav nav a {
  margin: 0 6px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  padding: 6px 10px;
  border-radius: 8px;
}
.site-nav nav a:hover { background: rgba(255, 255, 255, 0.4); }

/* ===== 通用容器 ===== */
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ===== 首屏 Hero ===== */
.hero {
  background: linear-gradient(150deg, #FFD400 0%, #ffe66b 100%);
  padding: 40px 0;
}
.hero .container { text-align: center; }
.hero h1 {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.hero p.tagline {
  font-size: 18px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}
.hero p.sub {
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 640px;
  margin: 0 auto 28px;
}
.hero .cta {
  display: inline-block;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  padding: 13px 30px;
  border-radius: 999px;
  margin: 6px;
}
.hero .cta.ghost {
  background: transparent;
  color: var(--ink);
  border: 2px solid var(--ink);
}

/* ===== 区块 ===== */
section.block { padding: 36px 0; }
section.block.alt { background: var(--card); }
.block h2 {
  font-size: 30px;
  font-weight: 800;
  text-align: center;
  margin-bottom: 8px;
}
.block .lede {
  text-align: center;
  color: var(--muted);
  max-width: 700px;
  margin: 0 auto 36px;
}
.block h3 { font-size: 20px; font-weight: 700; margin: 18px 0 8px; }
.block p { margin-bottom: 12px; }
.block ul { margin: 8px 0 8px 22px; }
.block li { margin-bottom: 6px; }

/* ===== 卡片网格 ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
/* 三列等宽网格（9 项 → 3×3 均衡排列） */
.grid-3col {
  grid-template-columns: repeat(3, 1fr);
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 5px 24px;
}
.card .icon { font-size: 30px; margin-bottom: 10px; }
.card h3 { margin: 0 0 8px; }
.card p { color: var(--muted); margin: 0; }

/* ===== 步骤列表 ===== */
.steps { counter-reset: step; list-style: none; margin: 0; padding: 0; }
.steps li {
  counter-increment: step;
  position: relative;
  padding: 14px 0 14px 52px;
  border-bottom: 1px solid var(--line);
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 14px;
  width: 34px; height: 34px;
  background: var(--gold);
  border-radius: 50%;
  text-align: center;
  line-height: 34px;
  font-weight: 700;
}
.steps li:last-child { border-bottom: none; }
.steps .s-title { font-weight: 700; }
.steps .s-desc { color: var(--muted); }

/* ===== 二维码展示 ===== */
.qr-box { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.qr-box img { width: 160px; height: 160px; background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 8px; }
.qr-box .tip { max-width: 360px; color: var(--muted); }

/* 小程序直达链接 */
.mp-link {
  display: inline-block;
  margin-top: 14px;
  padding: 10px 22px;
  background: var(--gold);
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
  border-radius: 999px;
}
.mp-link:hover { background: var(--gold-dark); }

/* ===== 表格 ===== */
table { width: 100%; border-collapse: collapse; margin: 16px 0; }
th, td { text-align: left; padding: 10px 12px; border: 1px solid var(--line); }
th { background: #faf6ea; }
td { background: var(--card); }

/* ===== 页脚 ===== */
footer.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.75);
  padding: 36px 20px;
  margin-top: 40px;
  font-size: 14px;
}
footer .inner { max-width: 1080px; margin: 0 auto; }
footer a { color: var(--gold); text-decoration: none; }
footer .row { display: flex; flex-wrap: wrap; gap: 20px; justify-content: space-between; }
footer .col a { display: block; margin-bottom: 6px; color: rgba(255,255,255,0.85); }
footer .copyright { margin-top: 20px; opacity: 0.7; }
footer .icp { margin-top: 6px; opacity: 0.7; }
footer .icp a { color: rgba(255, 255, 255, 0.75); text-decoration: none; }
footer .icp a:hover { color: var(--gold); }

/* ===== 响应式 ===== */
@media (max-width: 800px) {
  .grid-3col { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .hero h1 { font-size: 32px; }
  .block h2 { font-size: 24px; }
  .site-nav .inner { flex-direction: column; align-items: flex-start; }
  .qr-box { flex-direction: column; align-items: flex-start; }
  .steps li { padding-left: 44px; }
}