@import url('https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:wght@400;700&family=Crimson+Pro:wght@400;500;600;700&display=swap');

:root {
  --ink: #1F3A5F;
  --deep: #14263C;
  --brick: #C2543C;
  --cream: #F4EFE6;
  --paper: #FFFCF6;
  --sand: #E3D8C6;
  --line: #CFC3AF;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--cream);
  color: var(--deep);
  font-family: 'Atkinson Hyperlegible', -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Crimson Pro', Georgia, 'Songti SC', 'SimSun', serif;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.26;
  letter-spacing: 0.01em;
}

p { margin: 0 0 14px; }

a {
  color: var(--ink);
  text-decoration: none;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

a:hover { color: var(--brick); }

a:focus-visible {
  outline: 3px solid var(--brick);
  outline-offset: 2px;
}

img { max-width: 100%; }

ul { margin: 0; padding: 0; list-style: none; }

div[id], section[id] { scroll-margin-top: 104px; }

/* 顶部：品牌居中，菜单分列两侧 */
.masthead {
  background: var(--cream);
  border-bottom: 3px solid var(--ink);
}

.mast-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 6px 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.side { flex: 1 1 0; min-width: 0; }
.side-b { display: flex; justify-content: flex-end; }

.flat { display: flex; flex-wrap: wrap; gap: 2px; }
.side-b .flat { justify-content: flex-end; }

.flat a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 10px;
  font-size: 16px;
  border-radius: 3px;
}

.flat a:hover { background: var(--ink); color: var(--cream); }

.brand {
  font-family: 'Crimson Pro', Georgia, 'Songti SC', serif;
  font-size: 23px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink);
  white-space: nowrap;
  padding: 0 12px;
}

/* 二级粘性锚点条 */
.anchorbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--ink);
  border-bottom: 3px solid var(--brick);
}

.strip {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
}

.strip a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  color: var(--cream);
  font-size: 16px;
  border-bottom: 3px solid transparent;
}

.strip a:hover {
  color: #FFFFFF;
  border-bottom-color: var(--brick);
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 18px 52px;
}

/* 首屏 */
.hero {
  min-height: 45vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 22px;
  padding: 34px 0 8px;
  background-image: radial-gradient(rgba(31, 58, 95, 0.20) 1px, transparent 1px);
  background-size: 16px 16px;
  background-position: 0 0;
}

.hero-copy { text-align: center; }

.hero h1 {
  margin: 0 auto;
  max-width: 20ch;
  font-size: clamp(30px, 5.2vw, 56px);
  letter-spacing: 0.02em;
}

.plates {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  border: 3px solid var(--ink);
  border-radius: 4px;
  background: var(--paper);
}

.plates .hero-img {
  width: 100%;
  height: clamp(150px, 22vh, 250px);
  object-fit: cover;
  border-radius: 2px;
  display: block;
}

.plate { flex: 1 1 0; height: 16px; border-radius: 2px; }
.p1 { background: var(--ink); }
.p2 { background: var(--brick); }
.p3 { background: var(--sand); }

/* 色块条：副标题挂在这里 */
.seam {
  margin: 28px 0 0;
  padding: 22px 20px;
  border-radius: 4px;
  background: var(--brick);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
}

.seam h2 {
  margin: 0;
  color: var(--cream);
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: 0.04em;
}

.seam .subtitle {
  margin: 0;
  color: rgba(244, 239, 230, 0.94);
  font-size: 16px;
}

/* 主体：aside 左，正文右 */
.layout {
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  gap: 26px;
  align-items: start;
  margin-top: 26px;
}

.rail {
  position: sticky;
  top: 112px;
  padding: 16px 12px;
  border: 2px solid var(--ink);
  border-radius: 18px;
  background: var(--paper);
}

.rail-h {
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--brick);
  font-size: 18px;
  letter-spacing: 0.08em;
}

.rail-list a {
  display: block;
  min-height: 42px;
  padding: 9px 8px;
  font-size: 16px;
  border-radius: 3px;
}

.rail-list a:hover { background: var(--ink); color: var(--cream); }

.col {
  min-width: 0;
  padding: clamp(18px, 3.2vw, 40px);
  border: 2px solid var(--ink);
  border-radius: 18px;
  background: var(--paper);
  box-shadow: 0 10px 24px rgba(31, 58, 95, 0.08);
}

.col div + div {
  margin-top: 34px;
  padding-top: 30px;
  border-top: 2px dashed var(--line);
}

.col h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 3vw, 30px);
}

.col h3 {
  margin: 24px 0 8px;
  font-size: 19px;
}

.col h4 { margin: 18px 0 6px; font-size: 17px; }

.col p { margin: 0 0 15px; }

.col ul { list-style: disc; padding-left: 1.35em; margin: 0 0 16px; }
.col ol { list-style: decimal; padding-left: 1.45em; margin: 0 0 16px; }
.col li { margin: 0 0 8px; }

.col a {
  color: var(--brick);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.col a:hover { color: var(--ink); }

.col img {
  border: 2px solid var(--ink);
  border-radius: 4px;
  height: auto;
}

.col figure { margin: 0 0 16px; }

.col blockquote {
  margin: 0 0 16px;
  padding: 12px 16px;
  border-left: 6px solid var(--brick);
  background: #F9F3E8;
  color: var(--deep);
}

.col table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 16px;
  font-size: 16px;
}

.col th, .col td {
  border: 2px solid var(--line);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

.col th { background: var(--sand); color: var(--ink); }

.col strong { color: var(--ink); }

/* 页脚：单行 */
.foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 18px;
  padding: 18px;
  background: var(--ink);
  border-top: 4px solid var(--brick);
  color: var(--cream);
}

.foot-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Crimson Pro', Georgia, 'Songti SC', serif;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.mark {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  background: var(--brick);
  display: inline-block;
}

.foot-brand a {
  display: flex;
  align-items: center;
  min-height: 44px;
  color: var(--cream);
}

.foot nav dl {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  margin: 0;
}

.foot dt { margin: 0; }
.foot dd { margin: 0; display: none; }

.foot dt a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 10px;
  font-size: 16px;
  color: var(--cream);
  border-radius: 3px;
}

.foot dt a:hover { background: var(--cream); color: var(--ink); }

.foot .copy {
  margin: 0;
  font-size: 16px;
  color: rgba(244, 239, 230, 0.85);
}

/* 滚动显现 */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 450ms ease, transform 450ms 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; }
}

@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .rail { display: none; }
}

@media (max-width: 720px) {
  .mast-inner { justify-content: center; padding: 4px 12px; }
  .side { display: none; }
  .brand { margin: 0 auto; font-size: 20px; }
  .strip {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 0 8px;
    scrollbar-width: thin;
  }
  .strip a { white-space: nowrap; padding: 0 14px; }
  main { padding: 0 14px 40px; }
  .hero { min-height: 0; padding: 26px 0 6px; }
  .hero h1 { font-size: clamp(26px, 7.6vw, 36px); }
  .seam { padding: 18px 16px; }
  .col { border-radius: 12px; }
  .foot { justify-content: flex-start; }
}

button[aria-expanded]{min-width:44px;min-height:44px}