/* 第6套 app 子域 · 登山路线图 Trail map：橄榄绿/岩灰、等高线、里程碑竖轴、地图折页 */
:root {
  --bg: #e7ecdf;
  --ink: #243024;
  --forest: #3f6b3a;
  --soil: #8a6a3b;
  --card: #f7f4ea;
  --marker: #c45c26;
  --rock: #5c6156;
  --mist: #d5dcc9;
  --line: rgba(36, 48, 36, 0.16);
  --dash: rgba(63, 107, 58, 0.45);
  --sans: "Lucida Sans", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max: 1080px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: auto; }
html, body { margin: 0; }
body {
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.82;
  background-color: var(--bg);
  background-image:
    repeating-radial-gradient(ellipse 82% 58% at 16% 18%, transparent 0 44px, rgba(63, 107, 58, 0.16) 45px 46px, transparent 47px),
    repeating-radial-gradient(ellipse 88% 62% at 84% 72%, transparent 0 56px, rgba(138, 106, 59, 0.13) 57px 58px, transparent 59px),
    repeating-radial-gradient(ellipse 70% 48% at 48% 92%, transparent 0 38px, rgba(36, 48, 36, 0.09) 39px 40px, transparent 41px),
    repeating-radial-gradient(ellipse 60% 40% at 70% 28%, transparent 0 32px, rgba(63, 107, 58, 0.1) 33px 34px, transparent 35px);
  background-attachment: fixed;
}

img, svg { max-width: 100%; height: auto; vertical-align: middle; }
a { color: var(--forest); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--marker); }
p { margin: 0 0 0.95rem; }
h1, h2, h3 { color: var(--ink); line-height: 1.35; font-weight: 700; }
h1 { font-size: clamp(1.55rem, 3.2vw, 2.2rem); margin: 0 0 0.9rem; }
h2 { font-size: clamp(1.18rem, 2.2vw, 1.42rem); margin: 0 0 0.8rem; }
h3 { font-size: 1.05rem; margin: 0 0 0.4rem; color: var(--forest); }
ul, ol { margin: 0 0 1rem; padding-left: 1.25rem; }
li + li { margin-top: 0.32rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { border: 1px solid var(--line); padding: 0.55rem 0.7rem; text-align: left; vertical-align: top; }
th { background: #e3ead4; color: var(--forest); font-weight: 700; }
caption { caption-side: bottom; text-align: left; color: var(--rock); font-size: 0.82rem; padding-top: 0.4rem; }

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--card);
  color: var(--ink);
  padding: 0.4rem 0.7rem;
  z-index: 80;
}
.skip:focus { left: 0.6rem; top: 0.6rem; }

.wrap { width: min(var(--max), calc(100% - 2rem)); margin: 0 auto; }

/* —— 游客中心横幅 —— */
.vc {
  background: var(--soil);
  color: #f7f1e2;
  border-bottom: 6px solid var(--forest);
  box-shadow: 0 8px 0 rgba(36, 48, 36, 0.08);
}
.vc__rail {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.35rem 0;
  color: #f3e6c8;
}
.vc__inner {
  background: var(--card);
  color: var(--ink);
  border-top: 2px dashed rgba(138, 106, 59, 0.45);
  border-bottom: 2px dashed rgba(138, 106, 59, 0.45);
}
.vc__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0 0.75rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.28rem;
  letter-spacing: 0.02em;
}
.brand:hover { color: var(--forest); text-decoration: none; }
.brand svg { width: 42px; height: 42px; flex: none; }
.brand small {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--soil);
  margin-top: 0.1rem;
}

.nav-switch { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.trails-toggle {
  display: none;
  border: 2px solid var(--forest);
  background: #eef3e4;
  color: var(--forest);
  padding: 0.35rem 0.7rem;
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
}
.trail-nav { display: flex; gap: 0.55rem; flex-wrap: wrap; }
.trail-nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 7.2rem;
  justify-content: center;
  padding: 0.42rem 0.75rem;
  background: #efe6cf;
  color: var(--ink);
  text-decoration: none;
  border: 2px solid var(--soil);
  box-shadow: 3px 3px 0 rgba(36, 48, 36, 0.12);
  font-size: 0.92rem;
}
.trail-nav a:hover {
  background: #e7d7b0;
  color: var(--ink);
  text-decoration: none;
}
.trail-nav a.is-on,
.trail-nav a[aria-current="page"] {
  background: var(--forest);
  color: #f4f7ee;
  border-color: #2d5229;
}
.vc__note {
  font-size: 0.82rem;
  color: var(--rock);
  padding: 0 0 0.7rem;
}

/* —— Hero 路线总览 —— */
.hero {
  padding: 1.6rem 0 0.4rem;
}
.hero-map {
  background:
    linear-gradient(90deg, transparent 49.6%, rgba(36, 48, 36, 0.07) 50%, transparent 50.4%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.35), transparent 28%),
    var(--card);
  border: 2px solid #c9c3ab;
  box-shadow: 10px 12px 0 rgba(36, 48, 36, 0.06);
  padding: 1.35rem 1.35rem 1.2rem;
  position: relative;
}
.hero-map::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  border-style: solid;
  border-width: 0 28px 28px 0;
  border-color: transparent #cfd6c2 transparent transparent;
  box-shadow: -2px 2px 0 rgba(36, 48, 36, 0.06);
}
.kicker {
  display: inline-block;
  background: var(--marker);
  color: #fff8ef;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  padding: 0.18rem 0.55rem;
  margin-bottom: 0.7rem;
}
.lead { font-size: 1.05rem; }
.elev {
  margin: 1.1rem 0 0.4rem;
  background: #e8eedd;
  border: 1px dashed var(--dash);
  padding: 0.7rem 0.85rem 0.55rem;
}
.elev__cap {
  display: flex;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--soil);
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}
.elev svg { display: block; width: 100%; height: 72px; }
.elev__ticks {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--rock);
  margin-top: 0.2rem;
}
.trail-chips {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.65rem;
  margin: 1rem 0 0.2rem;
}
.chip {
  background: #eef3e4;
  border: 1px solid #c5ceb4;
  padding: 0.65rem 0.7rem;
}
.chip strong { display: block; color: var(--forest); font-size: 0.92rem; }
.chip span { display: block; font-size: 0.8rem; color: var(--rock); }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
  margin: 1.05rem 0 0.2rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--marker);
  color: #fff8ef;
  text-decoration: none;
  padding: 0.62rem 1.05rem;
  border: 2px solid #9a4318;
  box-shadow: 3px 3px 0 rgba(36, 48, 36, 0.15);
  font-weight: 700;
}
.btn:hover { background: #a84b1c; color: #fff8ef; text-decoration: none; }
.btn--ghost {
  background: transparent;
  color: var(--forest);
  border-color: var(--forest);
  box-shadow: none;
}
.btn--ghost:hover { background: #e4ecd8; color: var(--forest); }
.cta-hint { font-size: 0.86rem; color: var(--rock); margin: 0; }

/* —— 展开折页 + 里程碑竖轴 —— */
.fold {
  position: relative;
  padding: 0.4rem 0 2.4rem;
}
.spine {
  position: relative;
  padding-left: 78px;
}
.spine::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 0.4rem;
  bottom: 0.2rem;
  width: 3px;
  background:
    repeating-linear-gradient(
      180deg,
      var(--forest) 0 10px,
      transparent 10px 16px
    );
}
.mile {
  position: relative;
  margin: 0 0 1.35rem;
}
.mile__num {
  position: absolute;
  left: -78px;
  top: 1.05rem;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--card);
  border: 3px solid var(--marker);
  color: var(--marker);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  line-height: 1.05;
  box-shadow: 0 0 0 4px var(--bg);
  z-index: 2;
}
.mile__num b { font-size: 0.95rem; }
.mile__num span { font-size: 0.62rem; letter-spacing: 0.06em; color: var(--soil); }
.mile:nth-child(even) .mile__num {
  border-color: var(--forest);
  color: var(--forest);
}
.fold-card {
  background:
    linear-gradient(90deg, transparent 49.7%, rgba(36, 48, 36, 0.06) 50%, transparent 50.3%),
    var(--card);
  border: 2px solid #cfc8af;
  padding: 1.15rem 1.2rem 1.05rem;
  box-shadow: 6px 8px 0 rgba(36, 48, 36, 0.05);
}
.km {
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--soil);
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.posts {
  display: grid;
  gap: 0.75rem;
}
.posts--3 { grid-template-columns: repeat(3, 1fr); }
.posts--2 { grid-template-columns: repeat(2, 1fr); }
.post {
  background: #eef3e4;
  border: 1px solid #c7d0b6;
  padding: 0.85rem 0.9rem;
}
.post footer {
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: var(--soil);
}

.camp-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}
.camp {
  border: 1px dashed var(--dash);
  padding: 0.8rem 0.85rem;
  background: rgba(247, 244, 234, 0.7);
}
.camp svg { width: 28px; height: 28px; margin-bottom: 0.3rem; }
.camp strong { display: block; margin-bottom: 0.25rem; }

.legend { margin: 0.9rem 0; overflow-x: auto; }

.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}
.pair .side {
  background: #eef3e4;
  border-left: 4px solid var(--forest);
  padding: 0.75rem 0.85rem;
}
.pair .side--warn { border-left-color: var(--marker); background: #f6efe2; }

.steps { margin: 0; padding: 0; list-style: none; counter-reset: chk; }
.steps li {
  position: relative;
  padding: 0.7rem 0.8rem 0.7rem 3.1rem;
  border: 1px solid #c7d0b6;
  background: #eef3e4;
  margin-bottom: 0.55rem;
}
.steps li::before {
  counter-increment: chk;
  content: counter(chk, decimal-leading-zero);
  position: absolute;
  left: 0.55rem;
  top: 0.75rem;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  background: var(--marker);
  color: #fff8ef;
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.faq-list { margin: 0; }
.faq-list dt {
  font-weight: 700;
  color: var(--forest);
  margin: 0.85rem 0 0.25rem;
  padding-left: 0.7rem;
  border-left: 3px solid var(--marker);
}
.faq-list dd { margin: 0 0 0.2rem; padding-left: 0.7rem; }
.faq-list dd p { margin-bottom: 0.4rem; }

.log {
  font-size: 0.95rem;
  border-top: 1px dashed var(--dash);
  padding-top: 0.7rem;
}
.log p { margin-bottom: 0.55rem; }

.stamp {
  display: inline-block;
  border: 3px solid var(--marker);
  color: var(--marker);
  padding: 0.15rem 0.45rem;
  transform: rotate(-6deg);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  font-weight: 700;
}

/* —— 页脚 —— */
.foot {
  background: #2a3228;
  color: #d8dece;
  padding: 1.4rem 0 1.6rem;
  border-top: 8px solid var(--soil);
}
.foot a { color: #e7d7b0; }
.foot p { margin-bottom: 0.55rem; }
.foot__brand { color: #f4f7ee; font-weight: 700; margin-bottom: 0.35rem; }

@media (max-width: 860px) {
  .trail-chips,
  .posts--3,
  .posts--2,
  .camp-grid,
  .pair { grid-template-columns: 1fr; }
  .spine { padding-left: 62px; }
  .spine::before { left: 20px; }
  .mile__num { left: -62px; width: 46px; height: 46px; }
}

@media (max-width: 680px) {
  .trails-toggle { display: inline-block; }
  .trail-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    padding-bottom: 0.6rem;
  }
  .nav-switch:checked ~ .trail-nav { display: flex; }
  .vc__row { flex-wrap: wrap; }
  .spine { padding-left: 0; }
  .spine::before { display: none; }
  .mile__num {
    position: static;
    width: auto;
    height: auto;
    flex-direction: row;
    gap: 0.35rem;
    border-radius: 999px;
    padding: 0.2rem 0.65rem;
    margin-bottom: 0.45rem;
    box-shadow: none;
  }
}