:root {
  /* 护眼配色：降饱和蓝 + 暖米绿背景，减少蓝光与强对比 */
  --primary: #5e9bc7;
  --primary-dark: #4a7da8;
  --primary-light: #8fbbda;
  --accent: #5b9bd5;
  --ink: #3b3b3b;
  --muted: #6b7a8c;
  --bg: #f0f4ed;
  --card-bg: #faf9f3;
  --warm-white: #faf9f3;
  --border: #d8dfd6;
  --note-bg: #eef2e6;
  --note-text: #3d5a4a;
  --topic-bg: #f3f6ee;
  --topic-border: #d8dfd6;
  --year-shadow: rgba(90, 110, 95, .07);
  --card-shadow: rgba(90, 110, 95, .07);
}

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

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
}

.hero {
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  color: #fbfbf5;
  padding: 54px 24px 64px;
  text-align: center;
}

.hero h1 {
  font-size: 34px;
  letter-spacing: 2px;
}

.hero p {
  margin-top: 10px;
  opacity: .95;
  font-size: 15px;
}

.topnav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(250, 249, 243, .90);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.topnav a {
  color: var(--primary-dark);
  text-decoration: none;
  font-size: 13px;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 20px;
}

.topnav a:hover {
  background: var(--note-bg);
}

.topnav .home {
  margin-right: auto;
  font-weight: 700;
  color: var(--primary);
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 28px 20px 80px;
}

.note {
  background: var(--note-bg);
  border-left: 4px solid var(--primary);
  padding: 14px 18px;
  border-radius: 8px;
  color: var(--note-text);
  font-size: 13.5px;
  margin: 18px 0 30px;
}

.year-block {
  background: var(--card-bg);
  border-radius: 14px;
  box-shadow: 0 6px 22px var(--year-shadow);
  padding: 26px 28px;
  margin-bottom: 30px;
  scroll-margin-top: 70px;
}

.year-block h2 {
  font-size: 22px;
  color: var(--primary);
  border-bottom: 2px dashed var(--border);
  padding-bottom: 10px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.year-block h2 .yr {
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  color: #fbfbf5;
  padding: 2px 12px;
  border-radius: 8px;
  font-size: 18px;
}

.year-block h2 .cnt {
  font-size: 13px;
  color: var(--muted);
  font-weight: 400;
}

.topic-box {
  background: var(--topic-bg);
  border: 1px solid var(--topic-border);
  border-radius: 10px;
  padding: 14px 18px;
  margin: 12px 0 18px;
  font-size: 14.5px;
}

.topic-box p {
  margin: 6px 0;
}

.topic-box ul {
  margin: 6px 0 6px 22px;
}

.topic-box li {
  margin: 4px 0;
}

.essay-card {
  border: 1px solid var(--topic-border);
  border-radius: 12px;
  padding: 18px 20px;
  margin-bottom: 18px;
  background: var(--warm-white);
}

.essay-card:last-child {
  margin-bottom: 0;
}

.essay-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.essnum {
  font-weight: 700;
  color: var(--primary);
  font-size: 15px;
}

.corr {
  font-size: 13px;
  color: var(--muted);
}

.essay-title {
  font-size: 17px;
  font-weight: 600;
  margin: 4px 0 8px;
  color: #3b3b3b;
}

.src {
  font-size: 13px;
  color: #5a5a5a;
  background: #f2f1ea;
  padding: 9px 13px;
  border-radius: 8px;
  margin: 8px 0;
}

.src a {
  color: var(--primary-dark);
  word-break: break-all;
}

.note-field {
  font-size: 13px;
  color: var(--note-text);
  background: var(--note-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 13px;
  margin: 10px 0;
}

.essay-body {
  font-size: 15.5px;
  margin-top: 6px;
}

.essay-body p {
  margin: 0 0 14px;
  text-indent: 2em;
}

.badge {
  display: inline-block;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 20px;
  color: #fbfbf5;
  font-weight: 600;
}

.badge-full {
  background: linear-gradient(135deg, #f0a05c, #e8843a);
}

.badge-exc {
  background: linear-gradient(135deg, #7ba5dc, #5e8fc9);
}

.footer {
  text-align: center;
  color: #9a9a8a;
  font-size: 12px;
  padding: 30px;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s ease, transform .7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* 总览页特有 */
.city-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 18px;
  margin: 24px 0 40px;
}

.city-grid .card {
  background: var(--warm-white);
  border-radius: 14px;
  box-shadow: 0 6px 22px var(--card-shadow);
  padding: 20px;
  transition: transform .25s;
}

.city-grid .card:hover {
  transform: translateY(-4px);
}

.city-grid .card h3 {
  color: var(--primary);
  font-size: 22px;
  margin-bottom: 6px;
}

.cnote {
  font-size: 12.5px;
  color: #8a8a7a;
  height: 34px;
  overflow: hidden;
}

.cstat {
  font-size: 13px;
  color: var(--primary-dark);
  margin: 8px 0;
}

.ylinks {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.ylinks a {
  font-size: 12px;
  color: var(--primary);
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2px 10px;
}

.ylinks a:hover {
  background: var(--note-bg);
}

.matrix {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
  background: var(--warm-white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 18px rgba(90, 110, 95, .06);
}

.matrix th,
.matrix td {
  border: 1px solid var(--topic-border);
  padding: 10px 6px;
  text-align: center;
  font-size: 13.5px;
}

.matrix thead th {
  background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
  color: #fbfbf5;
}

.matrix tbody th {
  background: var(--note-bg);
  color: var(--primary-dark);
}

.matrix a.m-full {
  display: inline-block;
  background: linear-gradient(135deg, #f0a05c, #e8843a);
  color: #fbfbf5;
  padding: 3px 12px;
  border-radius: 16px;
  text-decoration: none;
  font-weight: 600;
}

.matrix a.m-exc {
  display: inline-block;
  background: linear-gradient(135deg, #7ba5dc, #5e8fc9);
  color: #fbfbf5;
  padding: 3px 12px;
  border-radius: 16px;
  text-decoration: none;
  font-weight: 600;
}

.matrix a.m-multi {
  display: inline-block;
  background: var(--warm-white);
  color: #d96820;
  border: 2px solid #e88a3c;
  padding: 3px 10px;
  border-radius: 16px;
  text-decoration: none;
  font-weight: 700;
  line-height: 1.3;
}

.matrix a.m-multi .sub {
  font-size: 11px;
  font-weight: 400;
  color: #c2651a;
}

.matrix .m-none {
  color: #b8b8a8;
}

.sec-title {
  font-size: 22px;
  color: var(--primary);
  margin: 30px 0 6px;
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 26px;
  }

  .wrap {
    padding: 20px 15px 60px;
  }

  .year-block {
    padding: 20px 18px;
  }

  .city-grid {
    grid-template-columns: 1fr;
  }
}