/* 最合易经国学卜卦 — 手机优先 · 国学风格 */
:root {
  --paper: #f7f3e8;
  --paper-2: #efe8d6;
  --ink: #2b2620;
  --ink-soft: #6b6254;
  --cinnabar: #a83232;
  --line: #d8cdb4;
  --serif: "Noto Serif SC", "Source Han Serif SC", STSong, SimSun, serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.75;
}

body {
  padding-bottom: calc(64px + env(safe-area-inset-bottom));
}

/* ---------- 底部导航 ---------- */
.bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  display: flex;
  justify-content: center;
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
}
.nav-item {
  flex: 0 1 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-height: 56px;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 16px;
  letter-spacing: 1px;
}
.nav-item svg {
  width: 22px;
  height: 22px;
}
.nav-item.active {
  color: var(--ink);
  font-weight: 700;
}
.nav-item:active { background: var(--line); }

/* ---------- 支付 ---------- */
.key-display {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 2px;
  word-break: break-all;
  color: var(--ink);
  background: var(--paper-2);
  border: 1px dashed var(--line);
  padding: 10px 14px;
  text-align: center;
}

/* ---------- 站头 / 导航 ---------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--paper-2);
}
.brand {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--ink);
  text-decoration: none;
}
.brand span { color: var(--cinnabar); }

.site-tag {
  color: var(--ink-soft);
  font-size: 16px;
  letter-spacing: 2px;
}
.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  margin-left: 18px;
  font-size: 17px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.site-nav a:hover { color: var(--cinnabar); }

main {
  display: block;
  padding: 16px;
}

h1 {
  font-size: 24px;
  letter-spacing: 4px;
  margin: 8px 0 4px;
}
h2 {
  font-size: 17px;
  margin: 0 0 10px;
  font-weight: 600;
}
.lead { color: var(--ink-soft); margin: 0 0 16px; font-size: 16px; }
.hint { color: var(--ink-soft); font-size: 17px; margin: 6px 0; }

/* ---------- 面板卡片 ---------- */
.panel {
  border: 1px solid var(--line);
  border-top: 3px double var(--cinnabar);
  background: #fffdf6;
  padding: 14px 16px 18px;
  margin: 0 0 16px;
  border-radius: 2px;
}
.hidden { display: none !important; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 8px 22px;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  cursor: pointer;
  text-decoration: none;
  border-radius: 2px;
}
.btn:active { background: var(--paper-2); }
.btn-primary {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #fffdf6;
  width: 100%;
  font-size: 17px;
  letter-spacing: 6px;
}
.btn-primary:disabled { opacity: 0.5; cursor: default; }
.btn-row {
  display: flex;
  gap: 12px;
  margin-top: 10px;
}
.btn-row .btn { flex: 1; }
.gender-btn { font-size: 20px; letter-spacing: 8px; padding-left: 30px; }
.gender-btn.selected {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #fffdf6;
}

/* ---------- 取数格子 ---------- */
.hand-hint {
  text-align: center;
  color: var(--cinnabar);
  font-size: 17px;
  font-weight: 700;
  margin: 4px 0 10px;
  min-height: 26px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
  max-width: 420px;
  margin: 0 auto;
}
.cell {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  background: var(--paper-2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  min-width: 0;
  padding: 0;
  font-family: var(--serif);
  color: var(--cinnabar);
  font-size: 18px;
}
.cell:disabled { cursor: default; }
.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(168, 50, 50, 0.25);
  transform: scale(0);
  animation: ripple 0.6s ease-out;
  pointer-events: none;
}
@keyframes ripple {
  to { transform: scale(1); opacity: 0; }
}
.cell .num {
  animation: numin 0.4s ease-out;
  font-weight: 700;
}
@keyframes numin {
  from { transform: scale(0.3); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.cast-results {
  text-align: center;
  margin-top: 12px;
  color: var(--ink-soft);
  font-size: 16px;
}
.cast-results b { color: var(--cinnabar); }

/* ---------- 表单 ---------- */
.field { display: block; margin: 0 0 14px; }
.field > span {
  display: block;
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 4px;
}
.field select,
.field textarea,
.field input {
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: #fffdf6;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  border-radius: 2px;
}
.field textarea { resize: vertical; }

/* ---------- 卦象结果 ---------- */
.hex-block { text-align: center; }
.hex-name {
  font-size: 28px;
  letter-spacing: 6px;
  margin: 6px 0;
}
.hex-lines {
  width: 120px;
  margin: 8px auto;
}
.hex-line {
  position: relative;
  height: 14px;
  margin: 7px 0;
}
.hex-line.yang { background: var(--ink); }
.hex-line.yin::before,
.hex-line.yin::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 42%;
  background: var(--ink);
}
.hex-line.yin::before { left: 0; }
.hex-line.yin::after { right: 0; }
.hex-line.moving.yang,
.hex-line.moving.yin::before,
.hex-line.moving.yin::after { background: var(--cinnabar); }
.hex-line.moving::marker { color: var(--cinnabar); }
.hex-line .dot {
  position: absolute;
  left: -18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--cinnabar);
  font-size: 16px;
}
.hex-lines-wrap { position: relative; display: inline-block; }

.hex-meta { color: var(--ink-soft); font-size: 16px; }
.hex-meta .arrow { color: var(--cinnabar); }

.classic {
  text-align: left;
  border-top: 1px dashed var(--line);
  margin-top: 14px;
  padding-top: 12px;
}
.classic h3 {
  font-size: 17px;
  color: var(--cinnabar);
  margin: 12px 0 4px;
  letter-spacing: 2px;
}
.classic p { margin: 0 0 8px; font-size: 17px; }
.classic .yao-title { font-weight: 700; }

/* ---------- AI 解卦 ---------- */
.key-area { margin: 12px 0; }
.interpret-result { text-align: left; margin-top: 12px; }
.interpret-result h3 {
  font-size: 17px;
  color: var(--cinnabar);
  margin: 12px 0 4px;
  letter-spacing: 2px;
}
.interpret-result p { margin: 0 0 8px; font-size: 17px; }
#interpret-zone { border-top: 1px dashed var(--line); margin-top: 14px; padding-top: 12px; }
#btn-interpret { margin-top: 8px; }

/* ---------- 历史列表 ---------- */
.cards { display: flex; flex-direction: column; gap: 10px; }
.dcard {
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--line);
  background: #fffdf6;
  padding: 10px 14px;
  border-radius: 2px;
}
.dcard .hex-lines { width: 56px; margin: 0; flex: none; }
.dcard .hex-line { height: 7px; margin: 4px 0; }
.dcard-names { margin: 0; font-size: 16px; }
.dcard-meta { margin: 0; font-size: 17px; color: var(--ink-soft); }
.sentinel { height: 1px; }
.end-mark {
  text-align: center;
  color: var(--ink-soft);
  font-size: 16px;
  margin: 18px 0;
}

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 14px 16px 28px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 17px;
}
.purchase { margin-top: 8px; color: var(--cinnabar); }
.purchase p { margin: 0; }

.footer-link {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: none;
}
.footer-link:hover { color: var(--cinnabar); }

/* ---------- AI卦 卡片 ---------- */
.dcard-link {
  display: flex;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.dcard-link:hover { border-color: var(--ink); }
.dcard-motto { color: var(--ink-soft); font-size: 17px; margin: 2px 0 0; }
.dcard-interp { font-size: 16px; margin: 4px 0 0; }
.dcard-interp.interp-yes { color: var(--ink); }
.dcard-interp.interp-no { color: var(--cinnabar); }

/* ---------- ≥768px 桌面 ---------- */
@media (min-width: 768px) {
  main, .site-header, .site-footer { width: 100%; max-width: 720px; margin: 0 auto; }
  main { padding: 24px 16px; }
  .site-header { padding: 12px 16px; border-left: 1px solid var(--line); border-right: 1px solid var(--line); }
  .panel { padding: 18px 22px 22px; }
  h1 { font-size: 28px; }
}