/* ==========================================================================
   常西湖 · 生态文化门户  |  changxihu.com
   全局设计系统 / Global Design System
   --------------------------------------------------------------------------
   主题：浅色。湖绿主色 + 暖砂点缀，留白充足，中文排版优化。
   断点：1200 / 960 / 720 / 480
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计令牌 Design Tokens
   -------------------------------------------------------------------------- */
:root {
  /* 文字 */
  --ink: #14231f;
  --ink-2: #3d4f4a;
  --ink-3: #6b7d78;
  --ink-4: #98a8a4;

  /* 底色 */
  --bg: #ffffff;
  --bg-alt: #f5f8f7;
  --bg-deep: #eef3f1;

  /* 主色：湖水 */
  --brand: #0d6e63;
  --brand-dark: #095550;
  --brand-light: #12a08f;
  --brand-soft: #e3f2ef;
  --brand-softer: #f0f8f6;

  /* 点缀：暖砂 / 秋木 */
  --accent: #c07a3a;
  --accent-light: #e2a45f;
  --accent-soft: #faf1e7;

  /* 线与阴影 */
  --line: #dfe6e3;
  --line-strong: #c9d5d1;
  --shadow-sm: 0 1px 2px rgba(20, 35, 31, .05), 0 2px 8px rgba(20, 35, 31, .04);
  --shadow-md: 0 4px 12px rgba(20, 35, 31, .07), 0 12px 32px rgba(20, 35, 31, .06);
  --shadow-lg: 0 12px 28px rgba(20, 35, 31, .10), 0 32px 64px rgba(20, 35, 31, .08);

  /* 字体 */
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui,
    -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Songti SC", "Source Han Serif SC", "Noto Serif SC",
    "SimSun", Georgia, "Times New Roman", serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* 尺度 */
  --wrap: 1200px;
  --wrap-narrow: 820px;
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  --header-h: 72px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* --------------------------------------------------------------------------
   2. 基础重置 Reset & Base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  margin: 0 0 .6em;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
}

h1 { font-size: clamp(2rem, 4.6vw, 3.4rem); line-height: 1.2; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.35rem); }
h4 { font-size: 1.05rem; }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--brand);
  text-decoration: none;
  transition: color .18s var(--ease);
}
a:hover { color: var(--brand-light); }

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

ul, ol { margin: 0 0 1.1em; padding-left: 1.3em; }
li { margin-bottom: .4em; }

strong { color: var(--ink); font-weight: 600; }

::selection { background: var(--brand-soft); color: var(--brand-dark); }

:focus-visible {
  outline: 2px solid var(--brand-light);
  outline-offset: 3px;
  border-radius: 3px;
}

/* --------------------------------------------------------------------------
   3. 布局工具 Layout Utilities
   -------------------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}
.wrap-narrow {
  width: 100%;
  max-width: var(--wrap-narrow);
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 88px 0; }
.section--tight { padding: 60px 0; }
.section--alt { background: var(--bg-alt); }
.section--deep { background: var(--bg-deep); }

.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}
.section-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.section-head--center .eyebrow::after {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.lead {
  font-size: 1.06rem;
  color: var(--ink-2);
  line-height: 1.85;
}

.muted { color: var(--ink-3); }
.text-center { text-align: center; }

/* 栅格 */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* --------------------------------------------------------------------------
   4. 按钮 Button
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-family: inherit;
  font-size: .95rem;
  font-weight: 600;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease),
    background-color .18s var(--ease), color .18s var(--ease),
    border-color .18s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 4px 14px rgba(13, 110, 99, .26);
}
.btn--primary:hover {
  background: var(--brand-dark);
  color: #fff;
  box-shadow: 0 8px 22px rgba(13, 110, 99, .32);
}

.btn--ghost {
  background: transparent;
  color: var(--brand);
  border-color: var(--line-strong);
}
.btn--ghost:hover {
  border-color: var(--brand);
  background: var(--brand-softer);
  color: var(--brand-dark);
}

.btn--light {
  background: #fff;
  color: var(--brand-dark);
  box-shadow: var(--shadow-sm);
}
.btn--light:hover { color: var(--brand); box-shadow: var(--shadow-md); }

.btn--sm { padding: 9px 18px; font-size: .86rem; }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* 文字箭头链接 */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: .92rem;
}
.link-arrow::after {
  content: "";
  width: 14px;
  height: 14px;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h13M13 6l6 6-6 6'/%3E%3C/svg%3E") center / contain no-repeat;
          mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12h13M13 6l6 6-6 6'/%3E%3C/svg%3E") center / contain no-repeat;
  transition: transform .18s var(--ease);
}
.link-arrow:hover::after { transform: translateX(4px); }

/* --------------------------------------------------------------------------
   5. 顶部导航 Header
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 1px 16px rgba(20, 35, 31, .05);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* Logo */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.06rem;
  letter-spacing: .01em;
  flex-shrink: 0;
}
.brand:hover { color: var(--ink); }

.brand__mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 10px;
  background: linear-gradient(145deg, var(--brand-light), var(--brand));
  display: grid;
  place-items: center;
  box-shadow: 0 3px 10px rgba(13, 110, 99, .28);
}
.brand__mark svg { width: 21px; height: 21px; display: block; }

.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__cn { font-size: 1.02rem; font-weight: 700; }
.brand__en {
  font-size: .63rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-4);
}

/* 主导航 */
.nav { display: flex; align-items: center; gap: 4px; }

.nav__link {
  position: relative;
  padding: 9px 15px;
  font-size: .94rem;
  font-weight: 500;
  color: var(--ink-2);
  border-radius: var(--radius-pill);
  transition: color .18s var(--ease), background-color .18s var(--ease);
}
.nav__link:hover { color: var(--brand-dark); background: var(--brand-softer); }
.nav__link.is-active { color: var(--brand-dark); font-weight: 600; }
.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transform: translateX(-50%);
}

.header__actions { display: flex; align-items: center; gap: 12px; }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 50%;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  transform: translateX(-50%);
  transition: transform .25s var(--ease), opacity .18s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 20px; }
.nav-toggle span:nth-child(3) { top: 26px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateX(-50%) translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateX(-50%) translateY(-6px) rotate(-45deg); }

/* --------------------------------------------------------------------------
   6. 首屏 Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 12% 0%, #eaf6f4 0%, rgba(234, 246, 244, 0) 58%),
    radial-gradient(90% 80% at 92% 8%, #fdf4e9 0%, rgba(253, 244, 233, 0) 55%),
    linear-gradient(180deg, #fbfdfc 0%, #ffffff 100%);
  padding: 96px 0 0;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 -1px 0;
  height: 120px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), #fff 78%);
  pointer-events: none;
  z-index: 2;
}

.hero__grid {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 56px;
  align-items: center;
  padding-bottom: 120px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px 7px 9px;
  margin-bottom: 26px;
  font-size: .8rem;
  font-weight: 600;
  color: var(--brand-dark);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
}
.hero__badge b {
  display: inline-grid;
  place-items: center;
  padding: 2px 9px;
  font-size: .7rem;
  letter-spacing: .05em;
  color: #fff;
  background: var(--brand);
  border-radius: var(--radius-pill);
}

.hero h1 { margin-bottom: 22px; }
.hero h1 em {
  font-family: var(--font-serif);
  font-style: normal;
  font-weight: 400;
  color: var(--brand);
  position: relative;
}
.hero h1 em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: .08em;
  height: .32em;
  background: linear-gradient(90deg, rgba(18, 160, 143, .22), rgba(226, 164, 95, .22));
  border-radius: 4px;
  z-index: -1;
}

.hero__desc {
  font-size: 1.1rem;
  line-height: 1.9;
  max-width: 34em;
  margin-bottom: 34px;
}

.hero__actions { margin-bottom: 42px; }

/* 首屏小数据条 */
.hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}
.hero__fact {
  padding-right: 30px;
  margin-right: 30px;
  border-right: 1px solid var(--line);
}
.hero__fact:last-child { border-right: 0; margin-right: 0; padding-right: 0; }
.hero__fact dt {
  font-size: .78rem;
  color: var(--ink-3);
  margin-bottom: 2px;
}
.hero__fact dd {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}
.hero__fact dd small {
  font-family: var(--font-sans);
  font-size: .75rem;
  font-weight: 600;
  color: var(--ink-3);
  margin-left: 3px;
}

/* 首屏插画 */
.hero__art {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, .8);
  background: #eaf6f4;
  aspect-ratio: 4 / 3.3;
}
.hero__art img { width: 100%; height: 100%; object-fit: cover; }

.hero__card {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, .7);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.hero__card-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand);
}
.hero__card-icon svg { width: 20px; height: 20px; }
.hero__card-body { min-width: 0; }
.hero__card-title { display: block; font-size: .9rem; font-weight: 600; color: var(--ink); }
.hero__card-sub { display: block; font-size: .8rem; color: var(--ink-3); line-height: 1.6; }

/* 波浪分隔 */
.hero__waves {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 140px;
  display: block;
  z-index: 1;
}

/* --------------------------------------------------------------------------
   7. 数据统计 Stats
   -------------------------------------------------------------------------- */
.stats {
  position: relative;
  z-index: 4;
  margin-top: -60px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
}
.stat {
  padding: 34px 28px;
  border-right: 1px solid var(--line);
  text-align: center;
}
.stat:last-child { border-right: 0; }
.stat__num {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--brand);
  letter-spacing: -.02em;
}
.stat__num span { font-size: .55em; font-weight: 600; margin-left: 3px; color: var(--ink-3); }
.stat__label {
  margin-top: 8px;
  font-size: .86rem;
  color: var(--ink-3);
}

/* --------------------------------------------------------------------------
   8. 卡片 Card
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease),
    border-color .28s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
}

.card__icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand);
}
.card__icon svg { width: 24px; height: 24px; }
.card__icon--accent { background: var(--accent-soft); color: var(--accent); }

.card h3 { margin-bottom: 10px; }
.card p { font-size: .93rem; color: var(--ink-3); margin-bottom: 0; }
.card__foot { margin-top: 20px; padding-top: 18px; border-top: 1px dashed var(--line); }

/* 带序号的大卡片 */
.card--numbered { padding-top: 26px; }
.card__index {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--bg-deep);
  margin-bottom: 12px;
  transition: color .28s var(--ease);
}
.card:hover .card__index { color: var(--brand-soft); }

/* --------------------------------------------------------------------------
   9. 图文交错 Feature Split
   -------------------------------------------------------------------------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}
.split + .split { margin-top: 88px; }
.split--reverse .split__media { order: 2; }

.split__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
  background: var(--bg-alt);
  aspect-ratio: 4 / 3;
}
.split__media img { width: 100%; height: 100%; object-fit: cover; }

.split__body h2 { margin-bottom: 18px; }
.split__body p { color: var(--ink-2); }

/* 要点清单 */
.checklist { list-style: none; padding: 0; margin: 26px 0 0; }
.checklist li {
  position: relative;
  padding-left: 32px;
  margin-bottom: 14px;
  font-size: .95rem;
}
.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .42em;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--brand-soft);
}
.checklist li::after {
  content: "";
  position: absolute;
  left: 5px;
  top: .88em;
  width: 8px;
  height: 4px;
  border-left: 2px solid var(--brand);
  border-bottom: 2px solid var(--brand);
  transform: rotate(-45deg);
}

/* --------------------------------------------------------------------------
   10. 景点卡片 Scenery
   -------------------------------------------------------------------------- */
.scene-card {
  display: block;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  color: inherit;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease),
    border-color .28s var(--ease);
}
.scene-card:hover {
  transform: translateY(-5px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  color: inherit;
}
.scene-card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-alt);
}
.scene-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s var(--ease);
}
.scene-card:hover .scene-card__media img { transform: scale(1.05); }

.scene-card__tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 5px 12px;
  font-size: .74rem;
  font-weight: 600;
  color: #fff;
  background: rgba(13, 110, 99, .88);
  backdrop-filter: blur(6px);
  border-radius: var(--radius-pill);
}
.scene-card__tag--accent { background: rgba(192, 122, 58, .9); }

.scene-card__body { padding: 24px 24px 26px; }
.scene-card__body h3 { margin-bottom: 8px; }
.scene-card__body p {
  font-size: .92rem;
  color: var(--ink-3);
  margin-bottom: 0;
}
.scene-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: .8rem;
  color: var(--ink-4);
}
.scene-card__meta span { display: inline-flex; align-items: center; gap: 5px; }

/* 大图景点（首页） */
.scene-feature {
  position: relative;
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 11;
  box-shadow: var(--shadow-md);
  color: #fff;
}
.scene-feature img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .7s var(--ease);
}
.scene-feature:hover img { transform: scale(1.04); }
.scene-feature::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(9, 40, 36, 0) 34%, rgba(9, 40, 36, .82) 100%);
}
.scene-feature__body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 30px 32px;
}
.scene-feature__body h3 {
  color: #fff;
  margin-bottom: 8px;
  font-size: 1.35rem;
}
.scene-feature__body p {
  color: rgba(255, 255, 255, .82);
  font-size: .92rem;
  margin: 0;
  max-width: 42ch;
}
.scene-feature:hover { color: #fff; }

/* --------------------------------------------------------------------------
   11. 时间轴 Timeline
   -------------------------------------------------------------------------- */
.timeline {
  position: relative;
  padding-left: 34px;
  margin: 0;
  list-style: none;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--brand-light), var(--brand-soft));
  border-radius: 2px;
}
.timeline li {
  position: relative;
  margin-bottom: 34px;
  padding-left: 6px;
}
.timeline li:last-child { margin-bottom: 0; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 5px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--brand-light);
  box-shadow: 0 0 0 4px var(--brand-softer);
}
.timeline__year {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--brand);
  margin-bottom: 4px;
}
.timeline__title { font-weight: 600; color: var(--ink); margin-bottom: 4px; }
.timeline p { font-size: .92rem; color: var(--ink-3); margin: 0; }

/* --------------------------------------------------------------------------
   12. 四大中心 Grid
   -------------------------------------------------------------------------- */
.center-card {
  position: relative;
  padding: 28px 26px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}
.center-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--brand-light), var(--brand));
  opacity: 0;
  transition: opacity .28s var(--ease);
}
.center-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.center-card:hover::before { opacity: 1; }
.center-card__no {
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--brand-light);
  margin-bottom: 12px;
}
.center-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.center-card p { font-size: .9rem; color: var(--ink-3); margin: 0; }

/* --------------------------------------------------------------------------
   13. 资讯列表 News
   -------------------------------------------------------------------------- */
.news-list { list-style: none; padding: 0; margin: 0; }
.news-item {
  display: flex;
  gap: 26px;
  align-items: baseline;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line);
  transition: background-color .2s var(--ease), padding-left .2s var(--ease);
}
.news-item:first-child { border-top: 1px solid var(--line); }
.news-item:hover { background: var(--brand-softer); padding-left: 14px; }
.news-item__date {
  flex-shrink: 0;
  width: 100px;
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--ink-4);
}
.news-item__main { flex: 1; min-width: 0; }
.news-item__title {
  display: block;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}
.news-item__desc { display: block; font-size: .88rem; color: var(--ink-3); }
.news-item__cat {
  flex-shrink: 0;
  align-self: center;
  padding: 4px 12px;
  font-size: .74rem;
  font-weight: 600;
  color: var(--brand-dark);
  background: var(--brand-soft);
  border-radius: var(--radius-pill);
}

/* --------------------------------------------------------------------------
   14. CTA 区块
   -------------------------------------------------------------------------- */
.cta-band {
  position: relative;
  overflow: hidden;
  padding: 72px 56px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(100% 140% at 88% 10%, rgba(18, 160, 143, .34) 0%, rgba(18, 160, 143, 0) 60%),
    linear-gradient(135deg, #0b5c53 0%, #0d6e63 52%, #14867a 100%);
  color: #fff;
  text-align: center;
}
.cta-band::before,
.cta-band::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .12);
  pointer-events: none;
}
.cta-band::before { width: 380px; height: 380px; top: -190px; left: -110px; }
.cta-band::after { width: 300px; height: 300px; bottom: -170px; right: -80px; }
.cta-band h2 { color: #fff; margin-bottom: 14px; position: relative; }
.cta-band p {
  color: rgba(255, 255, 255, .82);
  max-width: 46em;
  margin: 0 auto 32px;
  position: relative;
}
.cta-band .btn-row { justify-content: center; position: relative; }

/* --------------------------------------------------------------------------
   15. 页脚 Footer
   -------------------------------------------------------------------------- */
.site-footer {
  margin-top: 0;
  padding: 70px 0 32px;
  background: #0e1f1c;
  color: rgba(255, 255, 255, .62);
  font-size: .9rem;
}
.site-footer h4 {
  color: #fff;
  font-size: .82rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  margin-bottom: 20px;
  font-weight: 600;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.footer__brand .brand { color: #fff; margin-bottom: 18px; }
.footer__brand .brand__cn { color: #fff; }
.footer__brand .brand__en { color: rgba(255, 255, 255, .45); }
.footer__brand p {
  font-size: .88rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, .55);
  max-width: 30em;
}
.footer__links { list-style: none; padding: 0; margin: 0; }
.footer__links li { margin-bottom: 11px; }
.footer__links a { color: rgba(255, 255, 255, .66); font-size: .89rem; }
.footer__links a:hover { color: #fff; }

.footer__contact { list-style: none; padding: 0; margin: 0; }
.footer__contact li {
  display: flex;
  gap: 10px;
  margin-bottom: 13px;
  font-size: .87rem;
  line-height: 1.6;
}
.footer__contact svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: .32em;
  color: var(--brand-light);
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 26px;
  font-size: .82rem;
  color: rgba(255, 255, 255, .42);
}
.footer__bottom a { color: rgba(255, 255, 255, .55); }
.footer__bottom a:hover { color: #fff; }

/* --------------------------------------------------------------------------
   16. 子页面 Page Hero
   -------------------------------------------------------------------------- */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 64px;
  background:
    radial-gradient(90% 120% at 8% 0%, #eaf6f4 0%, rgba(234, 246, 244, 0) 60%),
    linear-gradient(180deg, #f7fbfa 0%, #ffffff 100%);
  border-bottom: 1px solid var(--line);
}
.page-hero h1 { margin-bottom: 16px; }
.page-hero .lead { max-width: 46em; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: .82rem;
  color: var(--ink-4);
  list-style: none;
  padding: 0;
}
.breadcrumb li { margin: 0; }
.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--line-strong);
}

/* --------------------------------------------------------------------------
   17. 富文本 / 正文 Prose
   -------------------------------------------------------------------------- */
.prose h2 {
  margin-top: 56px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 20px);
}
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 36px; }
.prose p { color: var(--ink-2); }
.prose blockquote {
  margin: 28px 0;
  padding: 20px 26px;
  background: var(--brand-softer);
  border-left: 3px solid var(--brand-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--ink-2);
  font-size: .96rem;
}
.prose blockquote p:last-child { margin-bottom: 0; }
.prose ul li { color: var(--ink-2); }

/* 参数表 */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: .92rem;
}
.spec-table th,
.spec-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.spec-table th {
  width: 168px;
  font-weight: 600;
  color: var(--ink);
  background: var(--bg-alt);
  white-space: nowrap;
}
.spec-table td { color: var(--ink-2); }
.spec-table tr:first-child th,
.spec-table tr:first-child td { border-top: 1px solid var(--line); }

/* 提示条 */
.notice {
  display: flex;
  gap: 14px;
  padding: 18px 22px;
  margin: 28px 0;
  background: var(--accent-soft);
  border: 1px solid #f0ddc7;
  border-radius: var(--radius);
  font-size: .9rem;
  color: #7a4d18;
  line-height: 1.75;
}
.notice svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: .3em; color: var(--accent); }
.notice b { color: #5f3a10; }
.notice p:last-child { margin-bottom: 0; }

/* --------------------------------------------------------------------------
   18. 标签 / 徽章
   -------------------------------------------------------------------------- */
.tag-row { display: flex; flex-wrap: wrap; gap: 9px; margin: 24px 0 0; }
.tag {
  display: inline-block;
  padding: 6px 14px;
  font-size: .82rem;
  font-weight: 500;
  color: var(--ink-2);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
}

/* --------------------------------------------------------------------------
   18.1 折叠问答 FAQ
   -------------------------------------------------------------------------- */
.faq {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}
.faq details { border-bottom: 1px solid var(--line); }
.faq details:last-child { border-bottom: 0; }

.faq summary {
  position: relative;
  padding: 20px 56px 20px 24px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { background: var(--brand-softer); color: var(--brand-dark); }
.faq summary::after {
  content: "";
  position: absolute;
  right: 24px;
  top: 50%;
  width: 12px;
  height: 12px;
  margin-top: -7px;
  border-right: 2px solid var(--brand-light);
  border-bottom: 2px solid var(--brand-light);
  transform: rotate(45deg);
  transition: transform .25s var(--ease);
}
.faq details[open] summary { background: var(--brand-softer); }
.faq details[open] summary::after {
  transform: rotate(-135deg);
  margin-top: -3px;
}
.faq__body {
  padding: 4px 24px 22px;
  font-size: .94rem;
  color: var(--ink-2);
  line-height: 1.85;
}
.faq__body p:last-child { margin-bottom: 0; }

/* 季节卡片 */
.season-card {
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  border-top: 3px solid var(--brand-light);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}
.season-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.season-card:nth-child(1) { border-top-color: #7fbf6a; }
.season-card:nth-child(2) { border-top-color: #12a08f; }
.season-card:nth-child(3) { border-top-color: #e2a45f; }
.season-card:nth-child(4) { border-top-color: #8fa8b2; }
.season-card__name {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
}
.season-card p { font-size: .92rem; color: var(--ink-3); margin: 0; }

/* 路线步骤 */
.route {
  display: grid;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.route__step {
  display: flex;
  gap: 20px;
  padding: 22px 24px;
  border-bottom: 1px solid var(--line);
  transition: background-color .2s var(--ease);
}
.route__step:last-child { border-bottom: 0; }
.route__step:hover { background: var(--brand-softer); }
.route__no {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: .82rem;
  font-weight: 700;
  color: #fff;
  background: var(--brand);
  border-radius: 50%;
}
.route__body { flex: 1; min-width: 0; }
.route__title { display: block; font-weight: 600; color: var(--ink); margin-bottom: 3px; }
.route__desc { display: block; font-size: .9rem; color: var(--ink-3); }

/* 行内代码 */
code {
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-size: .86em;
  color: var(--brand-dark);
  background: var(--brand-softer);
  border: 1px solid var(--brand-soft);
  border-radius: 5px;
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   19. 滚动进场动效
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* 回到顶部 */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 90;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--ink-2);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .28s var(--ease), transform .28s var(--ease),
    visibility .28s var(--ease), color .18s var(--ease);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { color: var(--brand); }
.to-top svg { width: 18px; height: 18px; }

/* --------------------------------------------------------------------------
   20. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1080px) {
  .hero__grid { gap: 40px; }
  .split { gap: 44px; }
  .footer__top { grid-template-columns: 1.4fr 1fr 1fr; gap: 36px; }
  .footer__contact-col { grid-column: 1 / -1; }
}

@media (max-width: 960px) {
  .section { padding: 68px 0; }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 20px 24px;
    background: rgba(255, 255, 255, .98);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .24s var(--ease), transform .24s var(--ease),
      visibility .24s var(--ease);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav__link {
    padding: 14px 8px;
    border-radius: var(--radius-sm);
    border-bottom: 1px solid var(--line);
    font-size: 1rem;
  }
  .nav__link:last-child { border-bottom: 0; }
  .nav__link.is-active::after { display: none; }
  .nav__link.is-active { background: var(--brand-softer); }
  .nav-toggle { display: block; }
  .header__actions .btn { display: none; }

  .hero { padding-top: 64px; }
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 44px;
    padding-bottom: 88px;
  }
  .hero__art { aspect-ratio: 16 / 11; }

  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat { border-bottom: 1px solid var(--line); }
  .stat:nth-child(2n) { border-right: 0; }
  .stat:nth-last-child(-n+2) { border-bottom: 0; }

  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }

  .split { grid-template-columns: 1fr; gap: 36px; }
  .split + .split { margin-top: 60px; }
  .split--reverse .split__media { order: 0; }

  .footer__top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .cta-band { padding: 56px 32px; }
}

@media (max-width: 720px) {
  body { font-size: 15.5px; }
  .wrap, .wrap-narrow { padding: 0 18px; }
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 36px; }

  .hero__facts { gap: 18px 0; }
  .hero__fact {
    padding-right: 20px;
    margin-right: 20px;
  }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

  .news-item { flex-direction: column; gap: 6px; align-items: flex-start; }
  .news-item__date { width: auto; }
  .news-item__cat { align-self: flex-start; }

  .spec-table th { width: auto; }
  .spec-table, .spec-table tbody, .spec-table tr, .spec-table th, .spec-table td {
    display: block;
  }
  .spec-table th {
    border-bottom: 0;
    padding-bottom: 4px;
    background: transparent;
    color: var(--brand-dark);
  }
  .spec-table td { padding-top: 0; }

  .footer__top { grid-template-columns: 1fr; gap: 34px; }
  .to-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }
}

@media (max-width: 480px) {
  .hero__fact dd { font-size: 1.3rem; }
  .stats { grid-template-columns: 1fr; }
  .stat { border-right: 0; }
  .stat:nth-last-child(-n+2) { border-bottom: 1px solid var(--line); }
  .stat:last-child { border-bottom: 0; }
  .cta-band { padding: 44px 24px; }
  .cta-band .btn-row { flex-direction: column; }
  .cta-band .btn { width: 100%; }
}

/* 打印 */
@media print {
  .site-header, .to-top, .cta-band { display: none; }
  body { color: #000; }
}

/* 减弱动效偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}