:root {
  --paper: #15110d;
  --paper-2: #1c1712;
  --paper-edge: #2a2218;
  --ink: #e8dcc4;
  --ink-soft: #b5a888;
  --ink-faint: #756a54;
  --cinnabar: #9e3b2e;
  --cinnabar-soft: #b9554a;
  --jade: #6a8a78;
  --gold: #ffd700;
  --gold-soft: #b8902f;
  --line: rgba(201,168,90,0.22);
  --serif-en: "Cormorant Garamond", "Playfair Display", Georgia, "Times New Roman", serif;
  --serif-zh: "Kaiti SC", "STKaiti", "KaiTi", "Songti SC", "Noto Serif CJK SC", serif;
}

/* 白天浅色主题（JS 按时间切换：6:00-18:00 浅色，否则暗色） */
:root.theme-light {
  --paper: #efe6d3;
  --paper-2: #e6dac0;
  --paper-edge: #d8c9a8;
  --ink: #2a2521;
  --ink-soft: #5d544a;
  --ink-faint: #8a7e6e;
  --cinnabar: #9e3b2e;
  --cinnabar-soft: #b9554a;
  --jade: #4a6b5a;
  --gold: #a9852f;
  --gold-soft: #6b4f1c;
  --line: rgba(42,37,33,0.18);
}
:root.theme-light body {
  background:
    radial-gradient(circle at 20% 15%, rgba(255,255,255,0.4), transparent 45%),
    radial-gradient(circle at 80% 85%, rgba(168,133,47,0.08), transparent 50%),
    var(--paper);
}
:root.theme-light body::before {
  background-image:
    repeating-linear-gradient(0deg, rgba(120,100,70,0.03) 0 1px, transparent 1px 4px),
    repeating-linear-gradient(90deg, rgba(120,100,70,0.025) 0 1px, transparent 1px 5px);
}
:root.theme-light #question { background: rgba(255,255,255,0.5); }
:root.theme-light .gua-card { background: rgba(255,255,255,0.55); box-shadow: 0 4px 22px rgba(120,100,70,0.12); }

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }

body {
  font-family: var(--serif-zh);
  color: var(--ink);
  background:
    radial-gradient(circle at 50% 38%, rgba(232,220,196,0.05), transparent 55%),
    radial-gradient(circle at 50% 50%, transparent 55%, rgba(0,0,0,0.42) 100%),
    var(--paper);
  background-attachment: fixed;
  min-height: 100%;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 微粒纹理 */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 18% 24%, rgba(232,220,196,0.22), transparent),
    radial-gradient(1px 1px at 68% 16%, rgba(201,168,90,0.20), transparent),
    radial-gradient(1px 1px at 84% 70%, rgba(232,220,196,0.16), transparent),
    radial-gradient(1px 1px at 28% 82%, rgba(201,168,90,0.18), transparent);
  z-index: 0;
}

.paper {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
  padding: 56px 32px 72px;
}
/* 顶部金线装饰 */
.paper::before {
  content: "";
  position: absolute;
  top: 30px; left: 50%;
  transform: translateX(-50%);
  width: 120px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.6;
}

/* logo */
.logo { text-align: center; }
.logo-mark {
  width: 64px;
  height: 64px;
  display: inline-block;
  transition: transform 1.1s ease;
  filter: drop-shadow(0 0 8px rgba(201,168,90,0.28));
}
.logo:hover .logo-mark { transform: rotate(180deg); }

/* 头部 */
.site-header { text-align: center; margin-bottom: 40px; }
.title {
  font-family: var(--serif-en);
  font-size: 58px;
  letter-spacing: 0.06em;
  font-weight: 400;
  margin-top: 14px;
  line-height: 1.05;
  background: linear-gradient(180deg, #fff4b8 0%, #ffe066 22%, #ffd700 48%, #d9a522 76%, #b8902f 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  filter: drop-shadow(0 1px 1px rgba(255,244,184,0.45)) drop-shadow(0 3px 10px rgba(201,168,90,0.38));
}
.title .dot {
  background: linear-gradient(180deg, #d66b5a, #9e3b2e);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  filter: drop-shadow(0 0 8px rgba(158,59,46,0.55));
}
.tagline {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}
.tagline .zh {
  font-size: 16px;
  letter-spacing: 0.42em;
  color: var(--gold);
  text-indent: 0.42em;
}
.tagline .en {
  font-family: var(--serif-en);
  font-size: 11px;
  letter-spacing: 0.34em;
  color: var(--ink-faint);
  text-transform: uppercase;
  font-style: italic;
}
.rule {
  width: 90px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 22px auto 0;
  opacity: 0.7;
}

/* 提问区 */
.ask { margin-bottom: 34px; }
.ask label {
  display: block;
  font-size: 14px;
  color: var(--ink-soft);
  letter-spacing: 0.22em;
  margin-bottom: 12px;
}
.ask label .en {
  display: block;
  font-family: var(--serif-en);
  font-size: 11px;
  color: var(--ink-faint);
  letter-spacing: 0.16em;
  margin-top: 5px;
  font-style: italic;
}
#question {
  width: 100%;
  min-height: 76px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(28,23,18,0.6);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  padding: 14px 16px;
  font-family: var(--serif-zh);
  font-size: 17px;
  color: var(--ink);
  outline: none;
  transition: border-color .25s, box-shadow .25s;
}
#question:focus {
  border-color: var(--cinnabar-soft);
  box-shadow: 0 0 0 3px rgba(158,59,46,0.10);
}
#question::placeholder { color: var(--ink-faint); }

/* 占卜区 */
.divine {
  text-align: center;
  padding: 20px 0 8px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.turtle-wrap { position: relative; display: inline-block; margin: 6px 0 4px; }
#turtle { width: 168px; height: auto; cursor: pointer; transform-origin: 50% 52%; filter: drop-shadow(0 8px 22px rgba(0,0,0,0.5)); }
#turtle.shaking { animation: turtleShake 0.7s ease-in-out infinite; }
@keyframes turtleShake {
  0%,100% { transform: rotate(0deg) translateY(0); }
  20% { transform: rotate(-9deg) translateY(-6px); }
  40% { transform: rotate(8deg) translateY(-2px); }
  60% { transform: rotate(-6deg) translateY(-5px); }
  80% { transform: rotate(5deg) translateY(-1px); }
}

.hint {
  font-family: var(--serif-en);
  font-size: 12px; color: var(--ink-faint); letter-spacing: 0.16em; margin: 4px 0 16px;
  font-style: italic;
}

.shake-btn {
  font-family: var(--serif-zh);
  font-size: 18px;
  letter-spacing: 0.5em;
  text-indent: 0.5em;
  color: #f0e4cc;
  background: linear-gradient(180deg, var(--cinnabar), #722518);
  border: 1px solid rgba(185,85,74,0.5);
  border-radius: 2px;
  padding: 13px 40px 13px 46px;
  cursor: pointer;
  transition: background .2s, transform .1s, box-shadow .2s;
  box-shadow: 0 4px 16px rgba(158,59,46,0.26), inset 0 1px 0 rgba(255,255,255,0.08);
  -webkit-tap-highlight-color: transparent;
}
.shake-btn:hover { box-shadow: 0 6px 20px rgba(158,59,46,0.36), inset 0 1px 0 rgba(255,255,255,0.1); }
.shake-btn:active { transform: translateY(1px); }
.shake-btn:disabled { background: var(--paper-2); color: var(--ink-faint); border-color: var(--line); cursor: not-allowed; box-shadow: none; }

/* 爻位（由下往上） */
.casting {
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: 6px;
  margin: 22px auto 4px;
  min-height: 20px;
  width: fit-content;
  max-width: 100%;
}
.yaoline {
  display: flex;
  align-items: center;
  gap: 14px;
  opacity: 0;
  transform: translateY(8px);
  animation: lineIn .35s ease forwards;
}
@keyframes lineIn { to { opacity: 1; transform: translateY(0); } }
.yaoline .idx {
  width: 34px; text-align: right;
  font-family: var(--serif-en);
  font-size: 12px; color: var(--ink-faint);
  flex-shrink: 0;
  letter-spacing: 0.08em;
}
.yao-bars { display: flex; gap: 6px; flex-shrink: 0; }
.bar {
  width: 46px; height: 9px; border-radius: 1px;
  background: var(--gold);
  box-shadow: 0 0 5px rgba(201,168,90,0.22);
}
.bar.broken { background: transparent; position: relative; box-shadow: none; }
.bar.broken::before, .bar.broken::after {
  content: ""; position: absolute; top: 0; height: 9px; width: 20px;
  background: var(--gold); border-radius: 1px;
  box-shadow: 0 0 5px rgba(201,168,90,0.22);
}
.bar.broken::before { left: 0; }
.bar.broken::after { right: 0; }
.yaoline.changing .bar { background: var(--cinnabar); box-shadow: 0 0 6px rgba(158,59,46,0.38); }
.yaoline.changing .bar.broken::before, .yaoline.changing .bar.broken::after { background: var(--cinnabar); box-shadow: 0 0 6px rgba(158,59,46,0.38); }
.mark {
  width: 18px; text-align: center; font-size: 14px; color: var(--cinnabar-soft);
  flex-shrink: 0;
}
.coins { display: flex; gap: 5px; flex-shrink: 0; }
.coin {
  width: 16px; height: 16px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #d8b670, #a8853a);
  border: 1px solid #7a5e22;
  position: relative;
  box-shadow: 0 0 4px rgba(201,168,90,0.28);
}
.coin::after {
  content: ""; position: absolute; inset: 5px;
  background: var(--paper); border: 1px solid #7a5e22;
}
.coin.yin { background: radial-gradient(circle at 35% 30%, #4a4338, #2a2620); border-color: #5e574a; box-shadow: none; }
.coin.yin::after { border-color: #5e574a; background: var(--paper); }

/* 结果 */
.result { margin-top: 38px; }
.result[hidden] { display: none; }
.result .qecho {
  text-align: center; font-size: 16px; color: var(--ink-soft);
  margin-bottom: 22px; letter-spacing: 0.1em;
  word-break: break-word;
}
.result .qecho b { color: var(--cinnabar-soft); font-weight: 700; }

.gua-card {
  background: rgba(28,23,18,0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 24px 24px 26px;
  margin-bottom: 18px;
  box-shadow: 0 4px 22px rgba(0,0,0,0.3);
}
.gua-card .gc-head {
  display: flex; justify-content: space-between; align-items: baseline;
  flex-wrap: wrap; gap: 6px 12px;
  border-bottom: 1px solid var(--line); padding-bottom: 14px; margin-bottom: 16px;
}
.gua-name {
  font-family: var(--serif-zh);
  font-size: 30px; font-weight: 700; letter-spacing: 0.06em; color: var(--ink);
}
.gua-meta {
  font-family: var(--serif-en);
  font-size: 12px; color: var(--gold); letter-spacing: 0.18em; font-style: italic;
}

.gua-body { display: flex; gap: 24px; align-items: flex-start; }
.gua-fig { flex: 0 0 auto; display: flex; flex-direction: column-reverse; gap: 5px; padding-top: 2px; }
.gua-fig .fbars { display: flex; gap: 5px; }
.gua-fig .fbar { width: 30px; height: 7px; background: var(--gold); border-radius: 1px; box-shadow: 0 0 4px rgba(201,168,90,0.22); }
.gua-fig .fbar.brk { background: transparent; position: relative; box-shadow: none; }
.gua-fig .fbar.brk::before, .gua-fig .fbar.brk::after {
  content:""; position:absolute; top:0; height:7px; width:13px; background: var(--gold); border-radius:1px;
  box-shadow: 0 0 4px rgba(201,168,90,0.22);
}
.gua-fig .fbar.brk::before { left:0; } .gua-fig .fbar.brk::after { right:0; }
.gua-fig .fbar.chg { background: var(--cinnabar); box-shadow: 0 0 5px rgba(158,59,46,0.38); }
.gua-fig .fbar.brk.chg::before, .gua-fig .fbar.brk.chg::after { background: var(--cinnabar); box-shadow: 0 0 5px rgba(158,59,46,0.38); }

.gua-text { flex: 1; min-width: 0; }
.gua-text .label {
  font-family: var(--serif-en);
  font-size: 11px; color: var(--cinnabar-soft); letter-spacing: 0.3em; margin-bottom: 6px;
  text-transform: uppercase;
}
.gua-text .ci { font-size: 17px; line-height: 1.9; color: var(--ink); }
.gua-text .yaoci { margin-top: 12px; }
.gua-text .yaoci .yc {
  font-size: 15px; color: var(--ink-soft); line-height: 1.85;
  padding-left: 14px; border-left: 1px solid var(--cinnabar);
  margin: 6px 0;
}
.change-block { margin-top: 18px; }
.change-block .cb-title {
  font-family: var(--serif-en);
  font-size: 12px; color: var(--cinnabar-soft); letter-spacing: 0.28em; margin-bottom: 8px;
  text-transform: uppercase;
}

/* 断语 */
.verdict {
  text-align: center;
  padding: 26px 22px;
  border: 1px solid var(--cinnabar);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(158,59,46,0.10), rgba(158,59,46,0.03));
  box-shadow: 0 0 24px rgba(158,59,46,0.14);
}
.verdict .vword {
  font-family: var(--serif-zh);
  font-size: 56px; font-weight: 700; line-height: 1;
  color: var(--cinnabar);
  letter-spacing: 0.1em;
  text-shadow: 0 0 18px rgba(158,59,46,0.3);
}
.verdict .vword.bad { color: var(--ink-soft); text-shadow: none; }
.verdict .vdesc { margin-top: 14px; font-size: 16px; color: var(--ink-soft); letter-spacing: 0.05em; }
.verdict .vkey {
  font-family: var(--serif-en);
  margin-top: 8px; font-size: 11px; color: var(--ink-faint); letter-spacing: 0.2em; font-style: italic;
}
.verdict .vword-en {
  font-family: var(--serif-en);
  margin-top: 8px; font-size: 16px; letter-spacing: 0.32em; color: var(--cinnabar-soft); text-transform: uppercase;
}
.verdict .vword-en.bad { color: var(--ink-soft); }
.verdict .vdesc-en {
  font-family: var(--serif-en);
  margin-top: 4px; font-size: 12px; color: var(--ink-faint); letter-spacing: 0.06em; font-style: italic;
}
.result .q-label { color: var(--ink-soft); }
.gua-text .yc-note { color: var(--ink-faint); font-size: 13px; }

/* 白话文翻译：与文言文上下对照 */
.gua-text .bai {
  font-size: 15px; line-height: 1.8; color: var(--ink-soft);
  margin: 5px 0 2px; padding-left: 12px;
  border-left: 2px solid var(--gold-soft);
  letter-spacing: 0.02em;
}
.change-block .bai.yc-bai {
  font-size: 14px; line-height: 1.8; color: var(--ink-soft);
  margin: -1px 0 8px; padding-left: 14px;
  border-left: 2px solid var(--gold-soft);
}

.again {
  display: block; margin: 28px auto 0;
  font-family: var(--serif-zh); font-size: 15px; letter-spacing: 0.4em; text-indent: 0.4em;
  color: var(--gold); background: transparent;
  border: 1px solid var(--gold-soft); border-radius: 2px;
  padding: 11px 32px; cursor: pointer; transition: background .2s, color .2s;
  -webkit-tap-highlight-color: transparent;
}
.again:hover { background: rgba(201,168,90,0.10); color: var(--ink); }

footer {
  margin-top: 56px; text-align: center;
  font-family: var(--serif-en);
  font-size: 11px; color: var(--ink-faint); letter-spacing: 0.18em;
  line-height: 2;
  font-style: italic;
}
footer br + br { content: ""; }

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .paper { padding: 44px 24px 56px; }
  .logo-mark { width: 56px; height: 56px; }
  .title { font-size: 48px; }
  .tagline .zh { font-size: 15px; }
}

@media (max-width: 600px) {
  .paper { padding: 32px 18px 46px; }
  .paper::before { top: 20px; width: 90px; }
  .logo-mark { width: 50px; height: 50px; }
  .title { font-size: 38px; }
  .tagline .zh { font-size: 14px; letter-spacing: 0.32em; }
  .tagline .en { font-size: 10px; }

  .ask label { font-size: 13px; }
  #question { font-size: 16px; padding: 12px 14px; min-height: 68px; }

  #turtle { width: 138px; height: 138px; }
  .shake-btn { font-size: 16px; letter-spacing: 0.4em; padding: 12px 30px 12px 36px; }
  .hint { font-size: 11px; letter-spacing: 0.12em; }

  .yaoline { gap: 10px; }
  .yaoline .idx { width: 28px; font-size: 11px; }
  .bar { width: 38px; height: 8px; }
  .bar.broken::before, .bar.broken::after { width: 16px; height: 8px; }
  .coin { width: 14px; height: 14px; }
  .coin::after { inset: 4px; }

  .gua-card { padding: 18px 16px 20px; }
  .gua-body { flex-direction: column; gap: 14px; }
  .gua-fig .fbar { width: 28px; height: 6px; }
  .gua-fig .fbar.brk::before, .gua-fig .fbar.brk::after { width: 12px; height: 6px; }
  .gua-name { font-size: 26px; }
  .gua-meta { font-size: 11px; }
  .gua-text .ci { font-size: 16px; }
  .gua-text .bai { font-size: 14px; }
  .change-block .bai.yc-bai { font-size: 13px; }

  .verdict { padding: 20px 14px; }
  .verdict .vword { font-size: 44px; }
  .verdict .vdesc { font-size: 15px; }
  .verdict .vword-en { font-size: 14px; }

  footer { font-size: 10px; letter-spacing: 0.12em; }
}

@media (max-width: 380px) {
  .paper { padding: 26px 14px 38px; }
  .title { font-size: 32px; }
  .tagline .zh { font-size: 12px; letter-spacing: 0.24em; }
  .logo-mark { width: 44px; height: 44px; }

  #turtle { width: 120px; height: 120px; }
  .shake-btn { font-size: 15px; letter-spacing: 0.35em; padding: 11px 26px 11px 32px; }

  .gua-name { font-size: 23px; }
  .verdict .vword { font-size: 36px; }

  .yaoline { gap: 8px; }
  .yaoline .idx { width: 24px; font-size: 10px; }
  .bar { width: 32px; }
  .bar.broken::before, .bar.broken::after { width: 13px; }
  .coin { width: 12px; height: 12px; }
  .coin::after { inset: 3px; }
}

@media (max-height: 480px) and (orientation: landscape) {
  .paper { padding-top: 24px; padding-bottom: 30px; }
  .paper::before { top: 14px; }
  .site-header { margin-bottom: 24px; }
  .logo-mark { width: 44px; height: 44px; }
  .title { font-size: 34px; margin-top: 8px; }
  .rule { margin-top: 14px; }
  #turtle { width: 120px; height: 120px; }
  .divine { padding: 14px 0 4px; }
}