/* ==========================================================================
   老道湾风景旅游 — 样式表
   风格：新中式山水 · 自然沉浸 · 清透留白
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计变量与基础重置
   -------------------------------------------------------------------------- */
:root {
  /* 主色板 */
  --ink:      #1b2a27;                 /* 墨色 */
  --mountain: #1f4d46;                 /* 远山青 */
  --bamboo:   #5b8c7a;                 /* 竹青 */
  --mist:     #f7faf7;                 /* 雾白 */
  --gold:     #c8a96a;                 /* 暖金 */
  --glass:    rgba(255, 255, 255, 0.72); /* 玻璃白 */

  /* 衍生色 */
  --ink-soft:    #46564f;
  --line:        rgba(27, 42, 39, 0.14);
  --line-soft:   rgba(27, 42, 39, 0.08);
  --shadow-soft: 0 10px 40px rgba(27, 42, 39, 0.10);
  --shadow-card: 0 6px 24px rgba(27, 42, 39, 0.08);

  /* 字体（系统字体，无外部依赖） */
  --font-serif: "Songti SC", "STSong", "SimSun", "Noto Serif SC", "Source Han Serif SC", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  /* 布局 */
  --container: 1200px;
  --header-h: 76px;
  --radius: 18px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 8px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--mist);
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.35;
}

/* 键盘焦点可见性 */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 4px;
}

[hidden] { display: none !important; }

/* 跳转链接（仅键盘聚焦时可见） */
.skip-link {
  position: fixed;
  top: -60px;
  left: 16px;
  z-index: 2000;
  padding: 10px 18px;
  background: var(--mountain);
  color: #fff;
  border-radius: 0 0 10px 10px;
  transition: top 0.25s ease;
}
.skip-link:focus { top: 0; }

/* --------------------------------------------------------------------------
   2. 通用布局与排版
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow { max-width: 820px; }

.section {
  padding: 110px 0;
  position: relative;
}

/* 区块标题 */
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.eyebrow {
  font-size: 13px;
  letter-spacing: 0.5em;
  text-indent: 0.5em; /* 平衡字间距 */
  color: var(--bamboo);
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  color: var(--ink);
}
.title-line {
  display: block;
  width: 56px;
  height: 2px;
  margin: 22px auto 0;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.section-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--ink-soft);
  opacity: 0.85;
}

/* 玻璃卡片 */
.glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 13px 34px;
  border-radius: 999px;
  font-size: 15px;
  letter-spacing: 0.14em;
  transition: transform 0.35s ease, box-shadow 0.35s ease,
              background-color 0.35s ease, color 0.35s ease,
              border-color 0.35s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-gold {
  background: var(--gold);
  color: #fff;
  box-shadow: 0 8px 24px rgba(200, 169, 106, 0.4);
}
.btn-gold:hover { background: #b8995a; box-shadow: 0 12px 30px rgba(200, 169, 106, 0.5); }
.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.75);
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.2); border-color: #fff; }

/* 滚动淡入上浮 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   3. 顶部导航
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  transition: background-color 0.45s ease, box-shadow 0.45s ease,
              -webkit-backdrop-filter 0.45s ease, backdrop-filter 0.45s ease;
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

/* 透明状态（首屏之上）：文字为白色 */
.site-header { color: #fff; }

/* 滚动后：雾白玻璃 */
.site-header.scrolled {
  background: rgba(247, 250, 247, 0.82);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--line-soft), 0 6px 24px rgba(27, 42, 39, 0.06);
  color: var(--ink);
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
}
.brand-logo {
  height: 44px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
}
.brand-text {
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.14em;
  white-space: nowrap;
}

/* 桌面导航 */
.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-list a {
  display: block;
  position: relative;
  padding: 10px 14px;
  font-size: 15px;
  letter-spacing: 0.1em;
  border-radius: 8px;
  transition: color 0.3s ease, background-color 0.3s ease;
}
/* 下划线指示 */
.nav-list a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 5px;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.35s ease;
}
.nav-list a:hover::after,
.nav-list a.active::after { transform: scaleX(1); }
.nav-list a.active { color: var(--gold); }
.site-header:not(.scrolled) .nav-list a.active { color: var(--gold); }
.site-header.scrolled .nav-list a:hover { background: rgba(27, 42, 39, 0.05); }

/* 汉堡按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: 10px;
  z-index: 1100; /* 高于抽屉层 */
}
.nav-toggle .bar {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.35s ease, opacity 0.35s ease;
}
.nav-toggle[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --------------------------------------------------------------------------
   4. 首屏 Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 560px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(160deg, #243c37 0%, var(--mountain) 45%, #2e5a50 100%);
}

/* 轮播图层 */
.hero-slides { position: absolute; inset: 0; }
.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transform: scale(1.06);
  transition: opacity 1.6s ease, transform 8s linear;
  will-change: opacity, transform;
}
.hero-slide.active {
  opacity: 1;
  transform: scale(1.02); /* 缓慢呼吸感（Ken Burns） */
}

/* 图片待上传占位 */
.hero-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(91, 140, 122, 0.35), transparent 55%),
    radial-gradient(ellipse at 80% 70%, rgba(200, 169, 106, 0.18), transparent 55%),
    linear-gradient(160deg, #243c37 0%, var(--mountain) 50%, #2e5a50 100%);
}
.hero-placeholder span {
  font-family: var(--font-serif);
  font-size: clamp(18px, 3vw, 26px);
  letter-spacing: 0.4em;
  text-indent: 0.4em;
  opacity: 0.75;
}

/* 压暗渐晕，保证文字可读 */
.hero-slides::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(27, 42, 39, 0.42) 0%, rgba(27, 42, 39, 0.12) 40%, rgba(27, 42, 39, 0.55) 100%);
  pointer-events: none;
}

/* 云雾装饰 */
.hero-mist { position: absolute; inset: 0; pointer-events: none; }
.mist {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  background: rgba(255, 255, 255, 0.10);
  animation: mist-drift 26s ease-in-out infinite alternate;
}
.mist-1 { width: 46vw; height: 22vh; left: -8vw; bottom: 12%; }
.mist-2 { width: 38vw; height: 18vh; right: -6vw; bottom: 26%; animation-delay: -8s; opacity: 0.8; }
.mist-3 { width: 30vw; height: 14vh; left: 28vw; bottom: 4%;  animation-delay: -16s; opacity: 0.6; }
@keyframes mist-drift {
  from { transform: translateX(-3vw) translateY(1vh); }
  to   { transform: translateX(3vw)  translateY(-2vh); }
}

/* 首屏文字 */
.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: 0 24px;
  max-width: 820px;
  will-change: transform;
}
.hero-eyebrow {
  font-size: 14px;
  letter-spacing: 0.55em;
  text-indent: 0.55em;
  opacity: 0.9;
  margin-bottom: 22px;
}
.hero-title {
  font-size: clamp(38px, 7vw, 72px);
  letter-spacing: 0.16em;
  text-shadow: 0 4px 30px rgba(27, 42, 39, 0.45);
  animation: hero-rise 1.4s ease both;
}
.hero-sub {
  margin-top: 20px;
  font-family: var(--font-serif);
  font-size: clamp(17px, 2.4vw, 22px);
  letter-spacing: 0.28em;
  opacity: 0.94;
  animation: hero-rise 1.4s ease 0.25s both;
}
.hero-desc {
  margin-top: 16px;
  font-size: 15px;
  letter-spacing: 0.12em;
  opacity: 0.82;
  animation: hero-rise 1.4s ease 0.45s both;
}
.hero-actions {
  margin-top: 40px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  animation: hero-rise 1.4s ease 0.65s both;
}
@keyframes hero-rise {
  from { opacity: 0; transform: translateY(26px); }
  to   { opacity: 1; transform: none; }
}

/* 手动切换箭头 */
.hero-arrow {
  position: absolute;
  z-index: 4;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.35);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: background-color 0.3s ease, transform 0.3s ease;
}
.hero-arrow:hover { background: rgba(255, 255, 255, 0.3); }
.hero-arrow-prev { left: 22px; }
.hero-arrow-next { right: 22px; }

/* 指示点 */
.hero-dots {
  position: absolute;
  z-index: 4;
  bottom: 84px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}
.hero-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transition: background-color 0.3s ease, transform 0.3s ease;
}
.hero-dot.active { background: var(--gold); transform: scale(1.25); }

/* 向下滚动提示 */
.scroll-hint {
  position: absolute;
  z-index: 4;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: #fff;
  opacity: 0.85;
  transition: opacity 0.3s ease;
}
.scroll-hint:hover { opacity: 1; }
.mouse {
  width: 24px;
  height: 38px;
  border: 1.5px solid rgba(255, 255, 255, 0.8);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 7px;
}
.wheel {
  width: 3px;
  height: 8px;
  border-radius: 3px;
  background: #fff;
  animation: wheel-drop 1.8s ease-in-out infinite;
}
@keyframes wheel-drop {
  0%   { transform: translateY(0);    opacity: 1; }
  70%  { transform: translateY(10px); opacity: 0; }
  100% { transform: translateY(0);    opacity: 0; }
}
.scroll-hint-text {
  font-size: 12px;
  letter-spacing: 0.4em;
  text-indent: 0.4em;
}

/* --------------------------------------------------------------------------
   5. 景区概览
   -------------------------------------------------------------------------- */
.section-overview {
  background:
    radial-gradient(ellipse at 85% 10%, rgba(91, 140, 122, 0.08), transparent 50%),
    var(--mist);
}
.overview-body { max-width: 860px; margin: 0 auto; }
.overview-text {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 2.1;
  text-align: justify;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
}

.stat-grid {
  margin-top: 52px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-card {
  padding: 30px 18px;
  text-align: center;
  transition: transform 0.45s ease, box-shadow 0.45s ease;
}
.stat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-soft); }
.stat-icon {
  display: inline-flex;
  color: var(--bamboo);
  margin-bottom: 12px;
}
.stat-name {
  display: block;
  font-family: var(--font-serif);
  font-size: 20px;
  letter-spacing: 0.3em;
  text-indent: 0.3em;
}
.stat-note {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   6. 山水画廊
   -------------------------------------------------------------------------- */
.section-gallery {
  background:
    radial-gradient(ellipse at 10% 90%, rgba(200, 169, 106, 0.06), transparent 50%),
    #fff;
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  aspect-ratio: 3 / 4;
  background: linear-gradient(150deg, #dce8e2, #c4d8cf);
  box-shadow: var(--shadow-card);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.22, 0.61, 0.36, 1), opacity 0.6s ease;
}
.gallery-item:hover img { transform: scale(1.06); }

/* 画廊占位卡片（无图片时） */
.gallery-placeholder {
  grid-column: 1 / -1;
  padding: 90px 24px;
  text-align: center;
  border: 1px dashed rgba(27, 42, 39, 0.25);
  border-radius: var(--radius);
  background:
    radial-gradient(ellipse at 30% 30%, rgba(91, 140, 122, 0.10), transparent 55%),
    radial-gradient(ellipse at 70% 70%, rgba(200, 169, 106, 0.08), transparent 55%),
    linear-gradient(150deg, #eef5f0, #e2ede7);
}
.gallery-placeholder strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 24px;
  letter-spacing: 0.35em;
  text-indent: 0.35em;
  color: var(--mountain);
  margin-bottom: 12px;
}
.gallery-placeholder p {
  font-size: 14px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   7. 灯箱
   -------------------------------------------------------------------------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 24, 22, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  animation: lb-fade 0.35s ease;
}
@keyframes lb-fade { from { opacity: 0; } to { opacity: 1; } }

.lb-figure {
  max-width: min(88vw, 1080px);
  max-height: 84vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.lb-img {
  max-width: 100%;
  max-height: 76vh;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  animation: lb-zoom 0.4s ease;
}
@keyframes lb-zoom {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: none; }
}
.lb-btn {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.28);
  transition: background-color 0.3s ease, transform 0.3s ease;
}
.lb-btn:hover { background: rgba(255, 255, 255, 0.28); transform: scale(1.06); }
.lb-close { top: 22px; right: 22px; }
.lb-prev  { left: 22px;  top: 50%; transform: translateY(-50%); }
.lb-next  { right: 22px; top: 50%; transform: translateY(-50%); }
.lb-prev:hover, .lb-next:hover { transform: translateY(-50%) scale(1.06); }

/* --------------------------------------------------------------------------
   8. 景点亮点
   -------------------------------------------------------------------------- */
.section-highlights {
  background:
    radial-gradient(ellipse at 90% 15%, rgba(91, 140, 122, 0.08), transparent 50%),
    var(--mist);
}
.highlight-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.highlight-card {
  padding: 36px 30px;
  transition: transform 0.45s ease, box-shadow 0.45s ease;
}
.highlight-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-soft); }
.highlight-icon {
  display: inline-flex;
  width: 54px;
  height: 54px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--mountain);
  background: rgba(91, 140, 122, 0.12);
  border: 1px solid rgba(91, 140, 122, 0.22);
  margin-bottom: 18px;
}
.highlight-card h3 {
  font-size: 20px;
  letter-spacing: 0.2em;
  margin-bottom: 10px;
}
.highlight-card p {
  font-size: 14px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   9. 四季老道湾
   -------------------------------------------------------------------------- */
.section-seasons { background: #fff; }
.season-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.season-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-card);
  transition: transform 0.45s ease, box-shadow 0.45s ease;
}
.season-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-soft); }
.season-scene {
  display: block;
  height: 170px;
  position: relative;
  overflow: hidden;
}
/* 四季纯 CSS 渐变小景 */
.season-scene::before,
.season-scene::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}
.scene-spring {
  background: linear-gradient(160deg, #dcefe0 0%, #a8cbb4 55%, #7fae94 100%);
}
.scene-spring::before {
  width: 120%; height: 90%;
  left: -10%; top: 38%;
  background: rgba(91, 140, 122, 0.5);
  filter: blur(2px);
}
.scene-spring::after {
  width: 90%; height: 55%;
  left: 30%; top: 55%;
  background: rgba(31, 77, 70, 0.45);
  filter: blur(2px);
}
.scene-summer {
  background: linear-gradient(160deg, #cfe7e2 0%, #7fb0a4 55%, #3f7a6c 100%);
}
.scene-summer::before {
  width: 130%; height: 80%;
  left: -15%; top: 45%;
  background: rgba(31, 77, 70, 0.5);
  filter: blur(2px);
}
.scene-summer::after {
  width: 70%; height: 45%;
  right: -10%; top: 28%;
  background: rgba(255, 255, 255, 0.35);
  filter: blur(14px);
}
.scene-autumn {
  background: linear-gradient(160deg, #f3e6cf 0%, #dcbf92 55%, #b98d5c 100%);
}
.scene-autumn::before {
  width: 120%; height: 85%;
  left: -10%; top: 42%;
  background: rgba(158, 106, 55, 0.45);
  filter: blur(2px);
}
.scene-autumn::after {
  width: 80%; height: 50%;
  left: 15%; top: 58%;
  background: rgba(122, 78, 38, 0.45);
  filter: blur(2px);
}
.scene-winter {
  background: linear-gradient(160deg, #f2f7f6 0%, #d7e3e0 55%, #b3c7c2 100%);
}
.scene-winter::before {
  width: 130%; height: 75%;
  left: -15%; top: 48%;
  background: rgba(160, 180, 175, 0.5);
  filter: blur(2px);
}
.scene-winter::after {
  width: 90%; height: 40%;
  left: 25%; top: 30%;
  background: rgba(255, 255, 255, 0.7);
  filter: blur(16px);
}
.season-info { padding: 22px 22px 26px; }
.season-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  font-family: var(--font-serif);
  font-size: 17px;
  color: #fff;
  background: var(--mountain);
  border-radius: 50%;
  margin-bottom: 12px;
}
.season-card:nth-child(1) .season-tag { background: #6f9a80; }
.season-card:nth-child(2) .season-tag { background: #3f7a6c; }
.season-card:nth-child(3) .season-tag { background: #b98d5c; }
.season-card:nth-child(4) .season-tag { background: #8aa3a0; }
.season-info h3 {
  font-size: 19px;
  letter-spacing: 0.2em;
  margin-bottom: 8px;
}
.season-info p { font-size: 14px; color: var(--ink-soft); }

/* --------------------------------------------------------------------------
   10. 推荐游玩路线（时间线）
   -------------------------------------------------------------------------- */
.section-route {
  background:
    radial-gradient(ellipse at 8% 20%, rgba(91, 140, 122, 0.08), transparent 50%),
    var(--mist);
}
.route-timeline {
  position: relative;
  max-width: 680px;
  margin: 0 auto;
  padding-left: 8px;
}
/* 中轴线 */
.route-timeline::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--bamboo), rgba(91, 140, 122, 0.15));
}
.route-step {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 18px 0;
}
.route-num {
  flex: none;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--mountain);
  background: #fff;
  border: 2px solid var(--bamboo);
  border-radius: 50%;
  box-shadow: 0 4px 14px rgba(91, 140, 122, 0.25);
}
.route-body {
  padding-top: 4px;
}
.route-body h3 {
  font-size: 18px;
  letter-spacing: 0.18em;
  margin-bottom: 4px;
}
.route-body p { font-size: 14px; color: var(--ink-soft); }

/* --------------------------------------------------------------------------
   11. 游客须知
   -------------------------------------------------------------------------- */
.section-notice { background: #fff; }
.notice-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  max-width: 980px;
  margin: 0 auto;
}
.notice-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  transition: transform 0.45s ease, box-shadow 0.45s ease;
}
.notice-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.notice-icon {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  color: var(--gold);
  background: rgba(200, 169, 106, 0.14);
  border-radius: 12px;
}
.notice-item h3 {
  font-size: 16px;
  letter-spacing: 0.16em;
  margin-bottom: 4px;
}
.notice-item p { font-size: 14px; color: var(--ink-soft); }

/* --------------------------------------------------------------------------
   12. 交通指南
   -------------------------------------------------------------------------- */
.section-transport {
  background:
    radial-gradient(ellipse at 85% 80%, rgba(200, 169, 106, 0.07), transparent 50%),
    var(--mist);
}
.transport-card {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  gap: 22px;
  padding: 40px 36px;
}
.transport-pin {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  color: #fff;
  background: linear-gradient(150deg, var(--bamboo), var(--mountain));
  border-radius: 50%;
  box-shadow: 0 8px 22px rgba(31, 77, 70, 0.3);
}
.transport-info h3 {
  font-size: 19px;
  letter-spacing: 0.2em;
  margin-bottom: 10px;
}
.transport-address {
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
}
.transport-note {
  margin-top: 12px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   13. 常见问题
   -------------------------------------------------------------------------- */
.section-faq { background: #fff; }
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  background: var(--mist);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-item:hover,
.faq-item[open] {
  border-color: rgba(91, 140, 122, 0.4);
  box-shadow: var(--shadow-card);
}
.faq-item summary {
  padding: 18px 22px;
  font-family: var(--font-serif);
  font-size: 16px;
  letter-spacing: 0.1em;
  cursor: pointer;
  position: relative;
  padding-right: 52px;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
/* 展开指示符号 */
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--bamboo);
  transition: transform 0.3s ease;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item p {
  padding: 0 22px 20px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   14. 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.78);
  padding: 56px 0 40px;
}
.footer-inner {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.footer-brand {
  font-family: var(--font-serif);
  font-size: 24px;
  letter-spacing: 0.3em;
  text-indent: 0.3em;
  color: #fff;
}
.footer-address { font-size: 14px; letter-spacing: 0.05em; }
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  margin-top: 8px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 13px;
}
.footer-beian { transition: color 0.3s ease; }
.footer-beian:hover { color: var(--gold); }
.footer-copy { opacity: 0.7; }

/* --------------------------------------------------------------------------
   15. 返回顶部
   -------------------------------------------------------------------------- */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 30px;
  z-index: 900;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--mountain);
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 50%;
  box-shadow: var(--shadow-card);
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.4s ease, transform 0.4s ease, background-color 0.3s ease;
}
.back-top.show { opacity: 1; transform: none; }
.back-top:hover { background: #fff; }

/* --------------------------------------------------------------------------
   16. 响应式
   -------------------------------------------------------------------------- */

/* 平板 ≤1024px */
@media (max-width: 1024px) {
  .section { padding: 88px 0; }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .highlight-grid { grid-template-columns: repeat(2, 1fr); }
  .season-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}

/* 手机 ≤768px */
@media (max-width: 768px) {
  :root { --header-h: 64px; }

  /* 汉堡按钮显示 */
  .nav-toggle { display: flex; }

  /* 导航变为全屏抽屉 */
  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 1050;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(24, 38, 35, 0.96);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.45s ease, visibility 0.45s ease;
  }
  .site-nav.open { opacity: 1; visibility: visible; }
  .nav-list {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
  .nav-list li { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
  .site-nav.open .nav-list li { opacity: 1; transform: none; }
  .site-nav.open .nav-list li:nth-child(1) { transition-delay: 0.08s; }
  .site-nav.open .nav-list li:nth-child(2) { transition-delay: 0.14s; }
  .site-nav.open .nav-list li:nth-child(3) { transition-delay: 0.20s; }
  .site-nav.open .nav-list li:nth-child(4) { transition-delay: 0.26s; }
  .site-nav.open .nav-list li:nth-child(5) { transition-delay: 0.32s; }
  .site-nav.open .nav-list li:nth-child(6) { transition-delay: 0.38s; }
  .site-nav.open .nav-list li:nth-child(7) { transition-delay: 0.44s; }
  .nav-list a {
    color: #fff;
    font-size: 19px;
    font-family: var(--font-serif);
    letter-spacing: 0.24em;
    padding: 13px 30px;
  }
  .nav-list a::after { left: 30px; right: 30px; }
  /* 抽屉打开时汉堡按钮固定为白色 */
  .site-header:not(.scrolled) .nav-toggle,
  .site-header.scrolled .nav-toggle { color: #fff; }

  .brand-logo { height: 36px; }
  .brand-text { font-size: 17px; }

  .section { padding: 72px 0; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .hero-dots { bottom: 76px; }
  .hero-arrow { display: none; } /* 手机端隐藏箭头，保留自动轮播 */
  .transport-card { flex-direction: column; padding: 32px 26px; }
  .back-top { right: 18px; bottom: 22px; }
}

/* 小屏手机 ≤520px */
@media (max-width: 520px) {
  body { font-size: 15px; }
  .container { padding: 0 18px; }
  .gallery-grid { grid-template-columns: 1fr; }  /* 画廊单列 */
  .stat-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat-card { padding: 22px 12px; }
  .highlight-grid { grid-template-columns: 1fr; }
  .season-grid { grid-template-columns: 1fr; }
  .hero { min-height: 520px; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .section-head { margin-bottom: 40px; }
  .route-timeline::before { left: 23px; }
  .route-num { width: 32px; height: 32px; font-size: 14px; }
  .route-step { gap: 16px; }
}

/* 320px 极小屏：保证不横向溢出 */
@media (max-width: 360px) {
  .brand-text { font-size: 15px; }
  .hero-title { letter-spacing: 0.08em; }
}

/* --------------------------------------------------------------------------
   17. 动效偏好：减少动画
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}