/* ============================================================
   玄机阁 · 周易问卦 —— 古风样式
   ============================================================ */
:root {
  --paper: #f3ead6;
  --paper-2: #ece0c4;
  --paper-3: #e2d2ae;
  --ink: #2b2118;
  --ink-soft: #5b4a37;
  --ink-faint: #8a755c;
  --vermilion: #a5321f;
  --vermilion-dark: #7c2417;
  --gold: #b8860b;
  --gold-soft: #d4af37;
  --bronze: #8a6d2f;
  --line: #caa96a;
  --shadow: rgba(88, 62, 24, 0.18);
  --serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
}

* { box-sizing: border-box; }

/* 确保 hidden 属性始终生效（防止 .loading 等 display 覆盖） */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--serif);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 50% -8%, rgba(184, 134, 11, 0.10), transparent 60%),
    radial-gradient(900px 500px at 100% 10%, rgba(165, 50, 31, 0.06), transparent 55%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
  background-attachment: fixed;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* 纸张纹理 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; }
p { margin: 0 0 0.8em; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: linear-gradient(180deg, rgba(243, 234, 214, 0.92), rgba(236, 224, 196, 0.88));
  backdrop-filter: blur(6px);
  border-bottom: 2px solid var(--ink);
  box-shadow: 0 3px 12px rgba(88, 62, 24, 0.12);
}
.site-header::after {
  content: ""; display: block; height: 3px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--vermilion) 50%, var(--gold) 100%);
  opacity: 0.85;
}
.header-frame {
  max-width: 1100px; margin: 0 auto; padding: 10px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  font-family: var(--serif); font-size: 34px; line-height: 1; color: var(--vermilion);
  text-shadow: 1px 1px 0 var(--gold-soft);
}
.brand-name {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", var(--serif);
  font-size: 27px; font-weight: 700; letter-spacing: 2px; color: var(--ink);
}
.brand-sub { margin: 0; font-size: 12px; letter-spacing: 4px; color: var(--ink-faint); }

.site-nav { display: flex; gap: 6px; }
.nav-link {
  padding: 8px 14px; font-size: 16px; letter-spacing: 2px; color: var(--ink-soft);
  border-bottom: 2px solid transparent; transition: 0.2s;
}
.nav-link:hover, .nav-link.is-active { color: var(--vermilion); border-bottom-color: var(--vermilion); }
.nav-toggle {
  display: none; flex-direction: column; gap: 5px; background: none; border: 0;
  cursor: pointer; padding: 6px;
}
.nav-toggle span { width: 26px; height: 2px; background: var(--ink); display: block; }

/* ---------- 主视觉 ---------- */
.hero {
  position: relative; overflow: hidden; text-align: center;
  padding: 88px 20px 96px;
  border-bottom: 2px solid rgba(43, 33, 24, 0.18);
}
.hero-clouds {
  position: absolute; inset: 0; pointer-events: none; opacity: 0.5;
  background:
    radial-gradient(circle at 12% 30%, rgba(184,134,11,.14), transparent 22%),
    radial-gradient(circle at 88% 24%, rgba(165,50,31,.10), transparent 20%),
    radial-gradient(circle at 20% 78%, rgba(202,169,106,.18), transparent 24%);
  filter: blur(2px);
}
.hero-inner { position: relative; max-width: 760px; margin: 0 auto; }
.seal {
  position: absolute; right: -24px; top: -44px; width: 84px; height: 84px;
  background: var(--vermilion); color: #fdf3e3; border-radius: 8px;
  display: grid; place-items: center; font-family: var(--serif);
  font-size: 26px; line-height: 1.15; text-align: center; letter-spacing: 2px;
  transform: rotate(-8deg); box-shadow: 0 4px 12px rgba(124,36,23,.4);
  border: 3px solid rgba(253,243,227,.7);
}
.hero-kicker {
  font-size: 15px; letter-spacing: 8px; color: var(--vermilion); margin-bottom: 18px;
}
.hero-title {
  font-family: var(--serif); font-size: clamp(42px, 7vw, 70px); font-weight: 400;
  letter-spacing: 6px; color: var(--ink);
  text-shadow: 2px 2px 0 rgba(184,134,11,.16);
}
.hero-desc {
  margin: 26px auto 34px; max-width: 620px; color: var(--ink-soft); font-size: 17px;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 按钮 ---------- */
.btn {
  font-family: var(--serif); font-size: 16px; letter-spacing: 2px; cursor: pointer;
  border: 2px solid var(--ink); background: transparent; color: var(--ink);
  padding: 12px 26px; border-radius: 4px; transition: 0.2s; position: relative;
}
.btn-primary { background: var(--vermilion); color: #fdf3e3; border-color: var(--vermilion-dark); }
.btn-primary:hover { background: var(--vermilion-dark); transform: translateY(-2px); box-shadow: 0 6px 14px rgba(124,36,23,.32); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: rgba(184,134,11,.12); transform: translateY(-2px); }
.btn-lg { padding: 15px 36px; font-size: 18px; }
.btn-sm { padding: 8px 16px; font-size: 14px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

/* ---------- 区块 ---------- */
.section { padding: 70px 0; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-title {
  font-family: var(--serif); font-size: 40px; font-weight: 400; letter-spacing: 6px; color: var(--ink);
}
.section-sub { color: var(--ink-faint); letter-spacing: 3px; margin-top: 8px; }
.section-title::after {
  content: ""; display: block; width: 60px; height: 3px; margin: 14px auto 0;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.panel {
  background: linear-gradient(180deg, #fdf7ea, #f6ecd2);
  border: 1px solid var(--line);
  border-radius: 10px; padding: 26px;
  box-shadow: 0 6px 22px var(--shadow);
  position: relative;
}
.panel::before {
  content: ""; position: absolute; inset: 7px; border: 1px solid rgba(202,169,106,.5);
  border-radius: 6px; pointer-events: none;
}
.panel-title { font-family: var(--serif); font-size: 26px; letter-spacing: 3px; color: var(--vermilion); }
.panel-note { color: var(--ink-faint); font-size: 14px; margin-top: 6px; }

.divine-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }

.field-label { display: block; font-weight: 700; letter-spacing: 2px; margin-bottom: 10px; color: var(--ink-soft); }
.question-input {
  width: 100%; border: 1.5px solid var(--line); background: #fffdf6; border-radius: 6px;
  padding: 13px 15px; font-family: var(--serif); font-size: 16px; color: var(--ink);
  resize: vertical; line-height: 1.6; transition: 0.2s;
}
.question-input:focus { outline: none; border-color: var(--vermilion); box-shadow: 0 0 0 3px rgba(165,50,31,.12); }

/* 掷币区 */
.coin-rig { margin-top: 16px; display: flex; flex-direction: column; gap: 8px; }
.coin-row {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px; border: 1px dashed rgba(138,109,47,.4); border-radius: 6px;
  background: rgba(255,253,246,.5);
  transition: 0.3s;
}
.coin-row.is-current { border-color: var(--vermilion); background: rgba(165,50,31,.05); }
.coin-row.is-done { border-style: solid; }
.coin-row-idx {
  width: 24px; text-align: center; font-family: var(--serif); color: var(--ink-faint);
  font-size: 15px;
}
.coins { display: flex; gap: 8px; flex: 1; justify-content: center; }
/* 开元通宝铜钱 */
.coin {
  position: relative; width: 40px; height: 40px; border-radius: 50%; flex: none;
  background: radial-gradient(circle at 32% 30%, #e7cf8f, #b58f3f 58%, #82652c);
  box-shadow: inset 0 0 0 2px #6b5224, inset 0 0 0 4px rgba(251,246,232,.35), 0 2px 6px rgba(43,33,24,.3);
  transition: transform 0.15s;
}
.coin::before { /* 方孔 */
  content: ""; position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 13px; height: 13px; background: #fbf6e8; border: 1.5px solid #6b5224; border-radius: 1.5px;
  z-index: 1;
}
.coin .inscription {
  position: absolute; inset: 0; pointer-events: none;
  font-family: var(--serif); font-weight: 700; color: #3a2b16; line-height: 1;
}
.coin .inscription span { position: absolute; font-size: 11px; }
.coin .inscription .i-top { top: 1px; left: 50%; transform: translateX(-50%); }
.coin .inscription .i-bottom { bottom: 1px; left: 50%; transform: translateX(-50%); }
.coin .inscription .i-left { left: 2px; top: 50%; transform: translateY(-50%); }
.coin .inscription .i-right { right: 2px; top: 50%; transform: translateY(-50%); }
.coin .back-mark {
  position: absolute; left: 22%; top: 30%; font-size: 16px; color: #6b5224;
  transform: rotate(-16deg); display: none;
}
.coin.is-back { filter: brightness(0.8); }
.coin.is-back .inscription { display: none; }
.coin.is-back .back-mark { display: block; }
.coin.animating { animation: coin-flip 0.95s ease-in-out; }
@keyframes coin-flip {
  0% { transform: rotateY(0) translateY(0); }
  40% { transform: rotateY(540deg) translateY(-18px) scale(1.08); }
  70% { transform: rotateY(900deg) translateY(4px) scale(0.96); }
  100% { transform: rotateY(1080deg) translateY(0) scale(1); }
}
.coin-row-val {
  width: 22px; text-align: center; font-weight: 700; color: var(--vermilion);
  font-size: 14px;
}
.cast-controls { margin-top: 22px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.cast-hint { color: var(--ink-faint); font-size: 14px; }

/* 预设问题 */
.preset-box { margin-top: 20px; }
.preset-title { font-size: 14px; letter-spacing: 2px; color: var(--ink-faint); margin-bottom: 10px; }
.preset-questions { display: flex; flex-wrap: wrap; gap: 10px; }
.preset-chip {
  font-family: var(--serif); font-size: 14px; line-height: 1.5; text-align: left;
  border: 1px solid var(--line); background: rgba(255,253,246,.7); color: var(--ink-soft);
  padding: 8px 14px; border-radius: 20px; cursor: pointer; transition: 0.2s;
}
.preset-chip:hover {
  border-color: var(--vermilion); color: var(--vermilion);
  background: rgba(165,50,31,.06); transform: translateY(-1px);
}
.preset-note { font-size: 13px; color: var(--ink-faint); margin-top: 12px; }
.coin-panel .panel-title { margin-bottom: 2px; }

/* 实时卦 */
.hex-stack { margin-top: 18px; display: flex; flex-direction: column; gap: 12px; align-items: center; }
.hex-line { width: 160px; max-width: 100%; display: flex; flex-direction: column; gap: 6px; align-items: center; }
.line-bars { display: flex; gap: 8px; width: 100%; justify-content: center; }
.hex-line.yang .bar { background: var(--ink); }
.hex-line .bar { height: 13px; border-radius: 2px; background: var(--ink); }
.hex-line.yin .bar { width: 46%; }
.hex-line.yang .bar { width: 100%; box-shadow: 0 1px 0 rgba(43,33,24,.4); }
.hex-line.moving .bar { background: var(--vermilion); }
.line-tag { font-size: 13px; color: var(--ink-faint); letter-spacing: 1px; }
.hex-line.moving .line-tag { color: var(--vermilion); font-weight: 700; }
.hex-line.empty .bar { background: transparent; width: 100%; height: 3px; border-top: 2px dashed rgba(138,109,47,.4); }
.hex-ident { margin-top: 16px; text-align: center; min-height: 30px; font-size: 17px; color: var(--ink-soft); }
.hex-ident strong { color: var(--vermilion); }

/* ---------- 结果 ---------- */
.result-area { margin-top: 34px; }
.two-gua { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.gua-card {
  background: linear-gradient(180deg, #fdf7ea, #f4e9cd); border: 1.5px solid var(--line);
  border-radius: 10px; padding: 26px; box-shadow: 0 6px 22px var(--shadow);
  position: relative; overflow: hidden;
}
.gua-card::after {
  content: ""; position: absolute; right: -40px; top: -40px; width: 120px; height: 120px;
  border-radius: 50%; background: radial-gradient(circle, rgba(184,134,11,.12), transparent 70%);
}
.bian-card { background: linear-gradient(180deg, #f7eee0, #f0e2c4); }
.moving-card {
  grid-column: 1 / -1; background: linear-gradient(180deg, #fbf3e3, #f4e8c8);
  margin-top: 30px; /* 与上方本卦/变卦爻拉开距离 */
}
.gua-head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.gua-tag {
  background: var(--vermilion); color: #fdf3e3; font-size: 13px; padding: 5px 12px;
  border-radius: 4px; letter-spacing: 2px; white-space: nowrap;
}
.gua-title { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.gua-imgname {
  font-family: "Songti SC", "SimSun", "Noto Serif SC", "STSong", serif;
  font-size: 26px; font-weight: 700; letter-spacing: 1px; color: var(--ink);
}
.gua-num { font-size: 13px; font-weight: 400; letter-spacing: 1px; color: var(--ink-faint); }
.gua-image { color: var(--ink-faint); margin-bottom: 10px; letter-spacing: 1px; }
.gua-lines { margin-bottom: 18px; }
/* 卦象 + 左侧上下卦标注 */
.gua-figure { display: flex; align-items: stretch; gap: 14px; }
.tri-left { display: flex; flex-direction: column; width: 96px; flex: none; }
.tri-left .tri {
  flex: 1; display: flex; flex-direction: column; align-items: flex-start; justify-content: center;
  gap: 2px; font-size: 14px; color: var(--ink-soft); font-family: var(--serif);
}
.tri-left .tri b { color: var(--vermilion); font-weight: 700; font-size: 12px; line-height: 1; }
.tri-left .tri .tri-text { color: var(--ink-soft); font-size: 15px; font-weight: 600; line-height: 1.3; }
.line-stack { flex: 1; display: flex; flex-direction: column; gap: 9px; }
.line-stack .hex-line { width: 100%; flex-direction: row; justify-content: space-between; gap: 14px; align-items: center; }
.line-stack .hex-line.tri-gap { margin-top: 18px; } /* 上卦与下卦爻之间拉开距离 */
.line-stack .line-bars { flex: 1; min-width: 120px; justify-content: space-between; }
.line-stack .line-tag { flex: none; min-width: 46px; text-align: right; }
.line-marker { color: var(--gold); font-weight: 800; margin-left: 7px; font-size: 16px; }
.hex-line.moving .line-marker { color: var(--vermilion); }
.gua-text h4 { font-size: 15px; color: var(--vermilion); letter-spacing: 2px; margin: 12px 0 6px; }
.gua-text p { color: var(--ink-soft); font-size: 15px; margin-bottom: 4px; }
.moving-list { display: flex; flex-direction: column; gap: 12px; }
.moving-note {
  background: rgba(184,134,11,.08); border-left: 4px solid var(--gold); padding: 12px 16px;
  border-radius: 6px; color: var(--ink-soft); font-size: 15px; line-height: 1.8;
}
.moving-note b { color: var(--vermilion); }
.moving-item {
  background: rgba(255,253,246,.6); border-left: 4px solid var(--gold); padding: 12px 16px;
  border-radius: 6px;
}
.moving-name-row { display: flex; align-items: center; gap: 12px; margin-bottom: 4px; }
.moving-name { font-weight: 700; color: var(--vermilion); }
.moving-change {
  font-size: 13px; color: #fff; background: var(--gold); padding: 2px 10px; border-radius: 12px;
  letter-spacing: 1px;
}
.moving-text { color: var(--ink-soft); font-size: 15px; }

/* AI 结论 */
.ai-panel { margin-top: 22px; }
.ai-head { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.ai-badge {
  background: var(--ink); color: var(--gold-soft); font-family: var(--serif); font-size: 18px;
  padding: 3px 10px; border-radius: 4px;
}
.ai-body { color: var(--ink-soft); font-size: 16px; }
.ai-result h4 { color: var(--vermilion); margin: 18px 0 6px; letter-spacing: 2px; font-size: 17px; }
.ai-result p { margin-bottom: 6px; }
.ai-result .ai-overall {
  font-family: var(--serif); font-size: 20px; color: var(--ink); letter-spacing: 1px;
  background: rgba(184,134,11,.08); padding: 16px 20px; border-radius: 8px;
  border-left: 4px solid var(--gold);
}
.loading { display: flex; align-items: center; gap: 12px; color: var(--ink-soft); }
.spinner {
  width: 20px; height: 20px; border: 3px solid rgba(184,134,11,.3); border-top-color: var(--vermilion);
  border-radius: 50%; animation: spin 0.8s linear infinite; display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }
.ai-error { background: rgba(165,50,31,.08); color: var(--vermilion-dark); padding: 14px 18px; border-radius: 6px; border-left: 4px solid var(--vermilion); }

/* ---------- 八卦精要 ---------- */
.bagua-wrap { text-align: center; margin-bottom: 42px; }
.bagua { max-width: 500px; margin: 0 auto; }
.bagua-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
  padding: 12px; background: linear-gradient(180deg, #fdf7ea, #f2e6c8);
  border: 2px solid var(--line); border-radius: 14px;
  box-shadow: 0 8px 24px var(--shadow);
}
.bagua-cell {
  border: 1.5px solid var(--line); border-radius: 10px;
  background: rgba(255,253,246,.7); padding: 14px 6px; text-align: center;
}
.bagua-center-cell { display: grid; place-items: center; background: transparent; border-style: dashed; }
.bagua-center { font-size: 54px; line-height: 1; color: var(--ink); }
.bagua-trigr { font-size: 30px; line-height: 1; color: var(--vermilion); }
.bagua-name { font-family: var(--serif); font-size: 19px; color: var(--ink); margin-top: 4px; }
.bagua-nature { font-size: 12px; color: var(--ink-faint); letter-spacing: 1px; }
.bagua-dir { font-size: 11px; color: var(--gold); margin-top: 2px; }

/* ---------- 页脚 ---------- */
.site-footer { background: #241a12; color: #cdb893; padding-top: 56px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 30px; padding-bottom: 40px; }
.footer-title { font-family: var(--serif); font-size: 22px; color: var(--gold-soft); margin-bottom: 14px; letter-spacing: 2px; }
.about-col p, .footer-note { font-size: 14px; line-height: 1.8; color: #b9a175; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #cdb893; transition: 0.2s; }
.footer-links a:hover { color: var(--gold-soft); }
.footer-bar {
  border-top: 1px solid rgba(205,184,147,.18); padding: 18px; text-align: center;
  font-size: 13px; color: #9c8768;
}

/* ---------- 六十四卦列表页 ---------- */
.hex-list { padding: 60px 0; }
.hex-search-wrap { max-width: 460px; margin: 8px auto 34px; }
.hex-search {
  width: 100%; border: 1.5px solid var(--line); background: #fffdf6; border-radius: 30px;
  padding: 12px 22px; font-family: var(--serif); font-size: 16px; color: var(--ink);
}
.hex-search:focus { outline: none; border-color: var(--vermilion); box-shadow: 0 0 0 3px rgba(165,50,31,.12); }
.gua-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.gua-item {
  background: linear-gradient(180deg, #fdf7ea, #f5ebd1); border: 1.5px solid var(--line);
  border-radius: 12px; padding: 20px; transition: 0.2s;
}
.gua-item:hover { transform: translateY(-3px); box-shadow: 0 10px 24px var(--shadow); border-color: var(--gold); }
.gua-item-head { display: flex; gap: 16px; align-items: center; margin-bottom: 12px; }
.mini-trigram {
  font-size: 30px; line-height: 1; color: var(--vermilion); letter-spacing: 0; flex: none;
  width: 42px; text-align: center;
}
.gi-name { font-family: "Songti SC", "SimSun", "Noto Serif SC", serif; font-size: 21px; font-weight: 700; color: var(--ink); }
.gi-sub { font-size: 13px; color: var(--ink-faint); margin-top: 4px; letter-spacing: 1px; }
/* 六爻列表：每爻一条，爻辞在右侧 */
.hx-lines { display: flex; flex-direction: column; gap: 8px; margin-bottom: 14px; }
.hx-row { display: flex; align-items: center; gap: 12px; }
.hx-row.tri-gap { margin-top: 22px; } /* 上卦与下卦爻之间拉开距离 */
.hx-minibar { display: flex; gap: 7px; width: 100px; flex: none; }
.hx-minibar span { height: 12px; border-radius: 2px; background: var(--ink); flex: 1; }
.hx-ref { width: 30px; flex: none; font-size: 12.5px; color: var(--ink-faint); text-align: right; }
.hx-text { flex: 1; font-size: 13.5px; color: var(--ink-soft); line-height: 1.55; }
.gi-guaci { font-size: 14px; color: var(--ink-soft); line-height: 1.8; padding-top: 10px; border-top: 1px dashed rgba(138,109,47,.4); }
.gi-guaci b { color: var(--vermilion); font-weight: 600; }
.gua-item.is-hidden { display: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .divine-layout { grid-template-columns: 1fr; }
  .two-gua { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .gua-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .site-nav {
    position: absolute; top: 100%; left: 0; right: 0; flex-direction: column;
    background: linear-gradient(180deg, #f6ecd2, #ece0c4); border-bottom: 2px solid var(--ink);
    padding: 10px; display: none;
  }
  .site-nav.is-open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-link { padding: 12px; text-align: center; }
  .seal { right: 0; top: -30px; width: 64px; height: 64px; font-size: 20px; }
  .hero { padding: 64px 20px 72px; }
  .hero-title { letter-spacing: 2px; }
  .gua-grid { grid-template-columns: 1fr; }
}