/* 样板山住民宿 · 设计主张：以海拔为标尺 */
:root {
  --paper: #f7f4ed;
  --ink: #1e2a26;
  --ink-soft: #4a554f;
  --ochre: #a04f22;
  --line: #d9d3c6;
  --line-strong: #b9b1a0;
  --white: #fffdf8;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  --serif: Georgia, "Songti SC", "Noto Serif SC", "Source Han Serif SC", SimSun, serif;
  --sans: -apple-system, "PingFang SC", "HarmonyOS Sans", "MiSans", "Noto Sans", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-5);
  background: rgba(247, 244, 237, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.nav { display: flex; gap: var(--space-5); }
.nav a {
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 0.04em;
  padding: var(--space-2) var(--space-1);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.nav a:hover { color: var(--ochre); }

/* ---------- 通用 ---------- */
.section { padding: var(--space-9) var(--space-5); max-width: 1120px; margin: 0 auto; }
.section[id] { scroll-margin-top: 72px; }
.section-head { margin-bottom: var(--space-7); }
.section-head h2 {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 600;
  line-height: 1.35;
  margin: 0 0 var(--space-4);
}
.note { font-size: 14px; line-height: 1.6; color: var(--ink-soft); margin: 0; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 var(--space-5);
  background: var(--ink);
  color: var(--paper);
  font-size: 17px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid var(--ink);
  border-radius: 0;
  cursor: pointer;
}
.btn:hover { background: #2e403a; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 var(--space-5);
  background: transparent;
  color: var(--ink);
  font-size: 17px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  cursor: pointer;
}
.btn-ghost:hover { border-color: var(--ink); }

/* ---------- 首屏 ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-8);
  align-items: end;
  max-width: 1120px;
  margin: 0 auto;
  padding: var(--space-9) var(--space-5) var(--space-8);
}

.kicker {
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--ochre);
  margin: 0 0 var(--space-5);
}

.hero h1 {
  font-family: var(--serif);
  font-size: 64px;
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 var(--space-5);
}

.lede {
  font-size: 17px;
  line-height: 1.75;
  color: var(--ink-soft);
  max-width: 30em;
  margin: 0 0 var(--space-6);
}

.hero-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* 海拔标尺 */
.hero-scale {
  position: relative;
  height: 420px;
  border-left: 1px solid var(--line-strong);
  padding-left: var(--space-5);
}
.scale-line {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line-strong);
}
.scale-tick {
  position: absolute;
  top: var(--p);
  transform: translateY(-50%);
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}
.scale-tick::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-5));
  width: var(--space-3);
  height: 1px;
  background: var(--ink);
}
.scale-tick span {
  font-size: 14px;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}
.scale-tick em { font-style: normal; font-size: 14px; color: var(--ochre); }
.scale-label {
  position: absolute;
  left: var(--space-5);
  top: calc(-1 * var(--space-6));
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
}

/* ---------- 房型 ---------- */
.room {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr) minmax(0, 1.1fr);
  gap: var(--space-6);
  padding: var(--space-7) 0;
  border-top: 1px solid var(--line);
  align-items: stretch;
}
.room:last-of-type { border-bottom: 1px solid var(--line); }

.room-scale {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-3);
}
.alt {
  font-size: 14px;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}
.alt-bar {
  display: block;
  width: 2px;
  height: calc(var(--h) * 1.6);
  min-height: 8px;
  max-height: 160px;
  background: var(--ochre);
}

.room-photo {
  display: grid;
  place-items: center;
  min-height: 240px;
  aspect-ratio: 3 / 2;
  background:
    repeating-linear-gradient(135deg, transparent 0 10px, rgba(30, 42, 38, 0.05) 10px 11px),
    var(--white);
  border: 1px solid var(--line);
}
.room-photo span,
.map-photo span {
  font-size: 14px;
  color: var(--ink-soft);
  padding: var(--space-3);
  text-align: center;
}

.room-body h3 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.5;
  margin: 0 0 var(--space-4);
}

.specs { margin: 0 0 var(--space-4); }
.specs div {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--line);
}
.specs dt { font-size: 14px; color: var(--ink-soft); margin: 0; }
.specs dd { font-size: 14px; margin: 0; text-align: right; }

.price {
  font-size: 40px;
  font-weight: 500;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  margin: 0;
}
.price span { font-size: 16px; font-weight: 400; color: var(--ink-soft); }

/* ---------- 交通 ---------- */
.access-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}
.access-copy h3 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 500;
  margin: 0 0 var(--space-3);
}
.access-copy p { margin: 0 0 var(--space-4); }
.access-copy ul { margin: 0 0 var(--space-5); padding-left: 1.2em; }
.access-copy li { margin-bottom: var(--space-2); }

.map-photo {
  display: grid;
  place-items: center;
  aspect-ratio: 3 / 2;
  background:
    repeating-linear-gradient(0deg, transparent 0 31px, rgba(30, 42, 38, 0.06) 31px 32px),
    repeating-linear-gradient(90deg, transparent 0 31px, rgba(30, 42, 38, 0.06) 31px 32px),
    var(--white);
  border: 1px solid var(--line);
}

/* ---------- 政策 ---------- */
.policy-list { margin: 0; max-width: 720px; }
.policy-list div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--line);
}
.policy-list div:last-child { border-bottom: 1px solid var(--line); }
.policy-list dt { font-size: 14px; color: var(--ink-soft); margin: 0; }
.policy-list dd { margin: 0; }

/* ---------- 表单 ---------- */
.form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5) var(--space-5);
  max-width: 760px;
}
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field-wide { grid-column: 1 / -1; }
.field label { font-size: 14px; letter-spacing: 0.04em; }
.field input,
.field textarea {
  font: inherit;
  color: var(--ink);
  background: var(--white);
  border: 1px solid var(--line-strong);
  border-radius: 0;
  padding: var(--space-3) var(--space-4);
  min-height: 48px;
}
.field textarea { resize: vertical; }
.field input:focus,
.field textarea:focus {
  outline: 2px solid var(--ochre);
  outline-offset: 2px;
}
.form-actions { grid-column: 1 / -1; }
.form-status {
  grid-column: 1 / -1;
  margin: 0;
  min-height: 1.6em;
  font-size: 14px;
  color: var(--ochre);
}

/* ---------- 联系 ---------- */
.contact-row { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: var(--space-7) var(--space-5);
  max-width: 1120px;
  margin: 0 auto;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}
.footer p { margin: 0 0 var(--space-2); }
.footer-sub { letter-spacing: 0.06em; }

/* ---------- 动效 ---------- */
/* 只有 JS 生效时才隐藏；关闭 JS 或未触发时内容始终可读 */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.js [data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---------- 移动端 390 ---------- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: var(--space-7); padding-top: var(--space-8); }
  .hero-scale { height: auto; border-left: 0; border-top: 1px solid var(--line-strong); padding: var(--space-5) 0 0; }
  .scale-line { display: none; }
  .scale-tick { position: static; transform: none; }
  .scale-tick::before { display: none; }
  .hero-scale { display: flex; flex-direction: column; gap: var(--space-2); }
  .scale-label { position: static; margin-top: var(--space-2); }

  .room { grid-template-columns: 1fr; gap: var(--space-4); padding: var(--space-6) 0; }
  .room-scale { flex-direction: row; align-items: center; justify-content: flex-start; gap: var(--space-3); }
  .alt-bar { width: calc(var(--h) * 1.2); max-width: 120px; height: 2px; min-height: 2px; max-height: none; }
  .access-grid { grid-template-columns: 1fr; }
  .form { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding: var(--space-8) var(--space-5); }
  .hero h1 { font-size: 40px; }
  .section-head h2 { font-size: 26px; }
  .price { font-size: 30px; }
  .nav { gap: var(--space-4); }
  .room-photo { min-height: 0; }
}