:root {
  --bg: #F6F3EC;
  --surface: #FDFCF9;
  --surface-alt: #EFECE4;
  --border: #E2DDD2;
  --border-dark: #C8C1B2;
  --ink: #1C1B18;
  --ink-sec: #5E5A52;
  --ink-muted: #948E82;
  --vermilion: #B03526;
  --vermilion-soft: rgba(176, 53, 38, 0.08);
  /* 传统矿物五色 */
  --wx-wood: #2D6A4F;
  --wx-fire: #B03526;
  --wx-earth: #9A6B2F;
  --wx-metal: #6C6860;
  --wx-water: #26547C;
}

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

html, body {
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: "Songti SC", "STSong", "Noto Serif SC", "PingFang SC", serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.ui-sans {
  font-family: "PingFang SC", -apple-system, BlinkMacSystemFont, "Microsoft YaHei", sans-serif;
}

/* 顶部极简导航栏 */
.topbar {
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  font-size: 0.86rem;
  color: var(--ink-sec);
  font-family: "PingFang SC", -apple-system, sans-serif;
}

.topbar a, .topbar button.link-btn {
  color: var(--ink-sec);
  background: none;
  border: none;
  font-size: 0.86rem;
  cursor: pointer;
  transition: color 0.15s;
  font-family: inherit;
}

.topbar a:hover, .topbar button.link-btn:hover {
  color: var(--vermilion);
}

/* 主体容器 */
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 36px 24px 72px;
}

/* 页头：克制留白 + 右侧视图切换 */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 32px;
}

.kicker {
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  color: var(--vermilion);
  margin-bottom: 6px;
  font-weight: 600;
  font-family: "PingFang SC", -apple-system, sans-serif;
  text-transform: uppercase;
}

h1 {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.subtitle {
  font-size: 0.92rem;
  color: var(--ink-sec);
  margin-top: 6px;
}

/* 分段视图切换器（单屏聚焦） */
.view-tabs {
  display: inline-flex;
  background: var(--surface-alt);
  padding: 4px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-family: "PingFang SC", -apple-system, sans-serif;
}

.view-tab {
  padding: 7px 18px;
  border: none;
  background: transparent;
  color: var(--ink-sec);
  font-size: 0.86rem;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.15s;
  font-family: inherit;
}

.view-tab.active {
  background: var(--surface);
  color: var(--ink);
  font-weight: 600;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

/* 主交互画布：左图右解 */
.stage {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 36px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  min-height: 440px;
}

.stage.single-col {
  grid-template-columns: 1fr;
}

@media (max-width: 780px) {
  .stage {
    grid-template-columns: 1fr;
    padding: 24px;
    gap: 28px;
  }
}

.canvas-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
}

/* 药丸切换按钮 */
.mode-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
  justify-content: center;
  font-family: "PingFang SC", -apple-system, sans-serif;
}

.pill {
  padding: 5px 14px;
  border: 1px solid var(--border-dark);
  background: transparent;
  color: var(--ink-sec);
  font-size: 0.82rem;
  border-radius: 99px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: "PingFang SC", -apple-system, sans-serif;
}

.pill:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.pill.active {
  background: var(--ink);
  color: var(--surface);
  border-color: var(--ink);
}

/* 右侧精简解读栏 */
.inspector {
  border-left: 1px solid var(--border);
  padding-left: 36px;
  width: 100%;
}

@media (max-width: 780px) {
  .inspector {
    border-left: none;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: 24px;
  }
}

.char-hero {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.char-big {
  font-size: 2.8rem;
  font-weight: 600;
  line-height: 1.05;
}

.seal {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--vermilion);
  color: var(--vermilion);
  font-size: 0.75rem;
  border-radius: 2px;
  font-weight: 600;
  font-family: "PingFang SC", -apple-system, sans-serif;
}

.kv-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 20px;
  margin-bottom: 18px;
  font-size: 0.88rem;
  font-family: "PingFang SC", -apple-system, sans-serif;
}

.kv-item span {
  display: block;
  font-size: 0.74rem;
  color: var(--ink-muted);
  margin-bottom: 2px;
}

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

.rule-note {
  background: var(--bg);
  padding: 14px 16px;
  border-left: 2px solid var(--vermilion);
  font-size: 0.88rem;
  color: var(--ink-sec);
  line-height: 1.65;
  font-family: "PingFang SC", -apple-system, sans-serif;
}

/* 通用宫格（九宫/十二宫/矩阵） */
.grid-3x3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(84px, 110px));
  gap: 10px;
}

.grid-4x4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(68px, 86px));
  grid-template-rows: repeat(4, minmax(68px, 82px));
  gap: 8px;
}

.grid-center-2x2 {
  grid-column: 2 / 4;
  grid-row: 2 / 4;
  border: 1px dashed var(--border-dark);
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--ink-muted);
  font-family: "PingFang SC", -apple-system, sans-serif;
}

.cell-box {
  background: var(--bg);
  border: 1px solid var(--border-dark);
  border-radius: 6px;
  padding: 10px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.cell-box:hover {
  border-color: var(--ink);
}

.cell-box.selected {
  background: var(--ink);
  color: var(--surface);
  border-color: var(--ink);
}

.cell-box.selected .cell-sub {
  color: #D2CCC0;
}

.cell-box.paired {
  background: var(--vermilion-soft);
  border-color: var(--vermilion);
  color: var(--vermilion);
}

.cell-box.paired .cell-sub {
  color: var(--vermilion);
}

.cell-main {
  font-size: 1.18rem;
  font-weight: 600;
  line-height: 1.2;
}

.cell-sub {
  font-size: 0.7rem;
  color: var(--ink-muted);
  margin-top: 2px;
  font-family: "PingFang SC", -apple-system, sans-serif;
}

/* 问答简洁样式 */
.quiz-opt {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  margin-bottom: 10px;
  background: var(--bg);
  border: 1px solid var(--border-dark);
  border-radius: 6px;
  font-size: 0.9rem;
  color: var(--ink);
  cursor: pointer;
  transition: all 0.15s;
  font-family: "PingFang SC", -apple-system, sans-serif;
}

.quiz-opt:hover {
  border-color: var(--ink);
}

.quiz-opt.right {
  border-color: var(--wx-wood);
  background: rgba(45, 106, 79, 0.08);
  color: var(--wx-wood);
  font-weight: 600;
}

.quiz-opt.wrong {
  border-color: var(--vermilion);
  background: var(--vermilion-soft);
  color: var(--vermilion);
}

/* 底部极简翻页 */
.footer-nav {
  margin-top: 28px;
  display: flex;
  justify-content: space-between;
  font-size: 0.86rem;
  color: var(--ink-sec);
  font-family: "PingFang SC", -apple-system, sans-serif;
}

.footer-nav a {
  color: var(--ink-sec);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--vermilion);
}

/* 侧边全站目录抽屉（素笺极简） */
.yx-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(28, 27, 24, 0.35);
  z-index: 200;
  display: none;
}
.yx-drawer-backdrop.open { display: block; }

.yx-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(380px, 90vw);
  height: 100vh;
  background: var(--surface);
  border-left: 1px solid var(--border-dark);
  z-index: 201;
  padding: 28px 24px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.24s ease;
  font-family: "PingFang SC", -apple-system, sans-serif;
}
.yx-drawer.open { transform: translateX(0); }

/* 阴阳爻极简绘制 */
.yao-stack {
  display: inline-flex;
  flex-direction: column-reverse;
  gap: 5px;
  width: 60px;
}
.yao-line {
  height: 6px;
  width: 100%;
  display: flex;
  justify-content: space-between;
}
.yao-yang {
  background: var(--ink);
  width: 100%;
  height: 100%;
  border-radius: 1px;
}
.yao-yin span {
  background: var(--vermilion);
  width: 44%;
  height: 100%;
  border-radius: 1px;
  display: block;
}