/* ============================================================
   hktubu.com - 香港行山徒步网 样式
   移动优先，绿色 + 大地色系户外风格
   ============================================================ */

:root {
  --green-900: #1d3d24;
  --green-700: #2f6b3a;
  --green-600: #3c8a4a;
  --green-100: #e8f2e4;
  --earth-700: #8a6b4a;
  --earth-100: #f5efe4;
  --text-main: #2b2b2b;
  --text-sub: #6b6b6b;
  --bg-body: #fafbf7;
  --bg-card: #ffffff;
  --border: #e3e6dc;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(30, 50, 30, 0.08);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  padding-bottom: 64px; /* 底部导航预留 */
}

a { color: var(--green-700); text-decoration: none; }
a:hover { opacity: 0.85; }

img { max-width: 100%; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--green-900);
  color: #fff;
}
.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  font-weight: 700;
  font-size: 17px;
}
.brand-mark { font-size: 20px; }
.brand-text { letter-spacing: 0.5px; }

.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.main-nav { display: none; }
.main-nav.open { display: block; position: absolute; top: 56px; left: 0; right: 0; background: var(--green-900); }
.main-nav ul { list-style: none; }
.main-nav li { border-top: 1px solid rgba(255,255,255,0.12); }
.main-nav a {
  display: block;
  padding: 14px 20px;
  color: #fff;
  font-size: 16px;
}
.main-nav a.active { background: var(--green-700); font-weight: 600; }

/* ---------- 主体 ---------- */
.site-main { min-height: 60vh; }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--green-900), var(--green-600));
  color: #fff;
  padding: 56px 20px 48px;
  text-align: center;
}
.hero h1 { font-size: 30px; margin-bottom: 10px; letter-spacing: 1px; }
.hero-sub { font-size: 15px; opacity: 0.92; margin-bottom: 24px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* 区块 */
.section { max-width: 1080px; margin: 0 auto; padding: 24px 16px; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 16px;
}
.section-head h2 { font-size: 21px; color: var(--green-900); }
.more-link { font-size: 14px; color: var(--green-700); }

/* 按钮 */
.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 24px;
  border: none;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  transition: opacity 0.2s;
}
.btn-primary { background: var(--green-600); color: #fff; }
.btn-outline { background: transparent; border: 1.5px solid var(--green-600); color: var(--green-600); }
.hero .btn-outline { border-color: #fff; color: #fff; }
.btn-sm { padding: 7px 16px; font-size: 13px; }

/* ---------- 路线卡片 ---------- */
.route-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.route-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  color: var(--text-main);
  transition: transform 0.15s;
}
.route-card:active { transform: scale(0.99); }
.route-card-body { padding: 16px; }
.route-card-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.route-card h3 { font-size: 17px; margin-bottom: 6px; color: var(--green-900); }
.route-card-desc { font-size: 14px; color: var(--text-sub); margin-bottom: 10px; }
.route-card-stats { list-style: none; display: flex; flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--text-sub); }

.tag {
  display: inline-block;
  background: var(--green-100);
  color: var(--green-700);
  border-radius: 12px;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 600;
}
.diff-tag { background: var(--earth-100); color: var(--earth-700); }
.diff-1 { background: #e7f5e8; color: #2e7d32; }
.diff-2 { background: #e3f2e8; color: #2f6b3a; }
.diff-3 { background: #fdf3d8; color: #9a7b2d; }
.diff-4 { background: #fce4d6; color: #b3541e; }
.diff-5 { background: #fbdcd6; color: #c0392b; }
.tag-hot { background: #ffece8; color: #d1492a; }

/* ---------- 小工具卡片 ---------- */
.tools-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 14px;
  text-align: center;
  color: var(--text-main);
}
.tool-icon { font-size: 30px; margin-bottom: 8px; }
.tool-card h3 { font-size: 16px; color: var(--green-900); margin-bottom: 4px; }
.tool-card p { font-size: 12px; color: var(--text-sub); }

/* ---------- 页面头部 ---------- */
.page-head { background: var(--green-100); padding: 32px 16px; }
.page-head-inner { max-width: 1080px; margin: 0 auto; }
.page-head h1 { font-size: 26px; color: var(--green-900); margin-bottom: 6px; }
.page-head p { font-size: 14px; color: var(--text-sub); }

/* 路线详情 */
.route-head-meta { display: flex; gap: 8px; margin-bottom: 8px; }
.route-en { color: var(--text-sub); font-size: 14px; }
.route-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 20px;
}
.fact { border-bottom: 1px dashed var(--border); padding: 6px 0; }
.fact-label { display: block; font-size: 12px; color: var(--text-sub); }
.fact-value { font-size: 15px; font-weight: 600; color: var(--green-900); }
.route-block { margin-bottom: 22px; }
.route-block h2 { font-size: 18px; color: var(--green-900); margin-bottom: 8px; padding-left: 10px; border-left: 4px solid var(--green-600); }
.route-block ul { padding-left: 20px; margin-bottom: 8px; }
.route-block li { margin-bottom: 4px; font-size: 14px; }
.route-summary { font-size: 14px; }
.back-link { margin-top: 20px; font-size: 14px; }

/* ---------- 筛选栏 ---------- */
.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
}
.filter-bar select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  background: #fff;
}
.result-count { font-size: 13px; color: var(--text-sub); margin-bottom: 12px; }
.empty-state { text-align: center; padding: 40px 16px; color: var(--text-sub); }

/* ---------- 小工具面板 ---------- */
.tool-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}
.tool-tab {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 12px;
  text-align: center;
  color: var(--text-main);
}
.tool-tab-icon { font-size: 26px; display: block; margin-bottom: 4px; }
.tool-tab-title { font-weight: 700; color: var(--green-900); font-size: 15px; display: block; }
.tool-tab-desc { font-size: 12px; color: var(--text-sub); }

.tool-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  margin-bottom: 20px;
}
.tool-panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.tool-panel-head h3 { font-size: 18px; color: var(--green-900); }
.tool-panel-desc { font-size: 13px; color: var(--text-sub); margin-bottom: 10px; }
.tool-note {
  background: #fff8e1;
  border: 1px solid #f0e0a0;
  color: #7a6a20;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 13px;
  margin-bottom: 10px;
}
.tool-update { font-size: 12px; color: var(--text-sub); margin-top: 10px; }

.api-list { list-style: none; }
.api-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.api-list li:last-child { border-bottom: none; }
.api-item-title { font-weight: 600; font-size: 15px; color: var(--green-900); }
.api-item-sub { font-size: 13px; color: var(--text-sub); }
.panel-empty { color: var(--text-sub); font-size: 14px; padding: 16px 0; }

/* 气温网格 */
.weather-desc { font-size: 15px; font-weight: 600; color: var(--green-900); margin-bottom: 6px; }
.weather-warning { font-size: 13px; color: #c0392b; background: #fdecea; border-radius: 8px; padding: 6px 10px; margin-bottom: 10px; }
.temp-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.temp-cell {
  background: var(--green-100);
  border-radius: 10px;
  padding: 10px 6px;
  text-align: center;
}
.temp-place { display: block; font-size: 12px; color: var(--text-sub); }
.temp-value { display: block; font-size: 20px; font-weight: 700; color: var(--green-900); }

.tool-source-note { font-size: 12px; color: var(--text-sub); background: var(--earth-100); border-radius: 10px; padding: 12px; margin-top: 8px; }

/* ---------- 广告位 ---------- */
.ad-section { padding-top: 4px; padding-bottom: 4px; }
.ad-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: linear-gradient(135deg, #f5efe4, #e8f2e4);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}
.ad-banner-alt { background: linear-gradient(135deg, #e8f2e4, #f5efe4); }
.ad-text { font-size: 14px; font-weight: 600; color: var(--green-900); }
.ad-hint { font-size: 12px; color: var(--text-sub); }

/* ---------- 内容区块 ---------- */
.content-block { margin-bottom: 24px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.content-block h2 { font-size: 18px; color: var(--green-900); margin-bottom: 8px; }
.content-block p, .content-block li { font-size: 14px; margin-bottom: 6px; }
.content-block ul { padding-left: 20px; }

/* ---------- 联系表单 ---------- */
.contact-wrap { max-width: 640px; }
.contact-form { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; color: var(--green-900); }
.form-row input, .form-row textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  background: #fff;
}
.form-row textarea { resize: vertical; }
.form-error { background: #fdecea; color: #c0392b; border-radius: 8px; padding: 10px 14px; margin-bottom: 14px; font-size: 14px; }
.form-success { text-align: center; padding: 30px 16px; }
.form-success h2 { color: var(--green-700); margin-bottom: 10px; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--green-900);
  color: rgba(255,255,255,0.8);
  padding: 24px 16px;
  font-size: 12px;
}
.footer-inner { max-width: 1080px; margin: 0 auto; text-align: center; }
.footer-slogan { font-size: 14px; color: #fff; margin-bottom: 6px; }
.footer-copy { margin-bottom: 4px; }
.footer-icp { opacity: 0.7; }

/* 底部固定导航（移动端） */
.bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  display: flex;
  background: #fff;
  border-top: 1px solid var(--border);
  box-shadow: 0 -2px 8px rgba(30,50,30,0.06);
}
.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 0 6px;
  font-size: 11px;
  color: var(--text-sub);
}
.bottom-nav-item.active { color: var(--green-700); font-weight: 600; }
.bottom-nav-icon { font-size: 20px; line-height: 1.2; }
.bottom-nav-label { line-height: 1.3; }

/* ---------- 桌面端适配 ---------- */
@media (min-width: 768px) {
  body { padding-bottom: 0; }
  .menu-toggle { display: none; }
  .main-nav { display: block; }
  .main-nav ul { display: flex; gap: 4px; }
  .main-nav li { border-top: none; }
  .main-nav a { padding: 8px 14px; border-radius: 20px; font-size: 15px; }
  .main-nav a:hover { background: rgba(255,255,255,0.12); }
  .main-nav a.active { background: var(--green-700); }
  .bottom-nav { display: none; }
  .route-grid { grid-template-columns: repeat(3, 1fr); }
  .tools-grid { grid-template-columns: repeat(4, 1fr); }
  .tool-tabs { grid-template-columns: repeat(4, 1fr); }
  .temp-grid { grid-template-columns: repeat(4, 1fr); }
  .route-facts { grid-template-columns: repeat(3, 1fr); }
  .hero { padding: 80px 20px; }
  .hero h1 { font-size: 40px; }
  .hero-sub { font-size: 17px; }
  .section { padding: 32px 24px; }
  .page-head { padding: 44px 24px; }
}