/* ═══════════════════════════════════════════════
   紫微斗数 · 命理论坛 — 主样式表
   Chinese Metaphysics Website
   ═══════════════════════════════════════════════ */

/* ─── CSS Variables ─── */
:root {
  --color-primary: #C81E1E;
  --color-primary-dark: #A01414;
  --color-primary-light: #E83939;
  --color-gold: #CF9F3A;
  --color-gold-light: #E8C86A;
  --color-gold-dark: #A67B28;
  --color-ink: #0D0D1A;
  --color-ink-light: #1A1A2E;
  --color-ink-lighter: #2D2D44;
  --color-paper: #F5F0E8;
  --color-paper-dark: #E8E0D0;
  --color-paper-darker: #D5CCB8;
  --color-text: #2D2D1C;
  --color-text-light: #6B6558;
  --color-text-lighter: #9A9485;
  --color-jade: #2D8A4E;
  --color-fire: #C81E1E;
  --color-water: #2980B9;
  --color-wood: #27AE60;
  --color-metal: #F1C40F;
  --color-earth: #8B6914;
  --color-bg: var(--color-ink);
  --color-surface: var(--color-ink-light);
  --color-border: var(--color-ink-lighter);
  --color-text-on-dark: #F5F0E8;
  --color-text-muted-on-dark: #A09880;
  --font-heading: 'KaiTi', 'STKaiti', 'SimKai', 'FangSong', 'Noto Serif SC', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --font-mono: 'Courier New', 'Consolas', monospace;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-glow-red: 0 0 20px rgba(200,30,30,0.15);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text-on-dark);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  width: 100%;
}

a { color: var(--color-gold); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-gold-light); }

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-ink); }
::-webkit-scrollbar-thumb { background: var(--color-ink-lighter); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-gold-dark); }

/* ═══════════════════════════════════════════════
   Header & Navigation
   ═══════════════════════════════════════════════ */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(13, 13, 26, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-on-dark) !important;
}

.logo-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: bold;
  transform: rotate(-3deg);
  transition: transform var(--transition);
}

.site-logo:hover .logo-seal {
  transform: rotate(0deg);
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 20px;
  letter-spacing: 2px;
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav {
  display: flex;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  color: var(--color-text-muted-on-dark) !important;
  font-size: 15px;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--color-primary);
  transition: transform var(--transition);
}

.nav-link:hover { color: var(--color-text-on-dark) !important; background: rgba(255,255,255,0.05); }
.nav-link:hover::after { transform: translateX(-50%) scaleX(1); }
.nav-link.active { color: var(--color-text-on-dark) !important; }
.nav-link.active::after { transform: translateX(-50%) scaleX(1); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-on-dark);
  font-size: 24px;
  cursor: pointer;
  padding: 4px 8px;
}

/* ═══════════════════════════════════════════════
   Main Content
   ═══════════════════════════════════════════════ */

.main-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 88px 24px 60px;
  min-height: 100vh;
  overflow-x: hidden;
  width: 100%;
}

/* ─── Page sections ─── */
.page { display: none; animation: fadeIn 0.5s ease; }
.page.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-header {
  text-align: center;
  margin-bottom: 40px;
}

.page-header h2 {
  font-family: var(--font-heading);
  font-size: 32px;
  letter-spacing: 4px;
  color: var(--color-gold);
  margin-bottom: 8px;
}

.page-desc {
  color: var(--color-text-muted-on-dark);
  font-size: 15px;
}

/* ═══════════════════════════════════════════════
   Hero Section (Home)
   ═══════════════════════════════════════════════ */

.hero {
  position: relative;
  text-align: center;
  padding: 80px 20px 60px;
  margin-bottom: 48px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-ink-light), var(--color-ink));
  border: 1px solid var(--color-border);
}

.hero-bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(200,30,30,0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(207,159,58,0.06) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(45,138,78,0.04) 0%, transparent 40%);
  pointer-events: none;
}

.hero-content { position: relative; z-index: 1; }

.hero-seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  border: 3px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: bold;
  transform: rotate(-5deg);
  margin-bottom: 24px;
  transition: transform 0.5s ease;
}

.hero-seal:hover { transform: rotate(0deg) scale(1.05); }

.hero-title {
  font-family: var(--font-heading);
  font-size: 48px;
  letter-spacing: 8px;
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-light), var(--color-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.hero-subtitle {
  font-family: var(--font-heading);
  font-size: 20px;
  color: var(--color-text-muted-on-dark);
  letter-spacing: 6px;
  margin-bottom: 20px;
}

.hero-desc {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
  color: var(--color-text-lighter);
}

/* ─── Quick Navigation Cards ─── */
.quick-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.quick-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.quick-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
  opacity: 0;
  transition: opacity var(--transition);
}

.quick-card:hover {
  transform: translateY(-4px);
  border-color: rgba(200,30,30,0.3);
  box-shadow: var(--shadow-glow-red), var(--shadow-md);
}

.quick-card:hover::before { opacity: 1; }

.quick-card-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.quick-card h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  color: var(--color-gold);
  margin-bottom: 8px;
}

.quick-card p {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  line-height: 1.6;
  margin-bottom: 16px;
}

.quick-card-action {
  font-size: 13px;
  color: var(--color-primary-light);
  transition: letter-spacing var(--transition);
}

.quick-card:hover .quick-card-action { letter-spacing: 1px; }

/* ─── Quote ─── */
.home-quote {
  text-align: center;
  padding: 40px;
  border-top: 1px solid var(--color-border);
  max-width: 700px;
  margin: 0 auto;
}

.quote-mark {
  font-family: var(--font-heading);
  font-size: 48px;
  color: var(--color-gold-dark);
  line-height: 1;
  margin-bottom: -12px;
}

.home-quote p {
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--color-text-muted-on-dark);
  line-height: 2;
}

.quote-source {
  font-size: 14px;
  color: var(--color-text-lighter);
  margin-top: 12px;
}

/* ═══════════════════════════════════════════════
   Forms
   ═══════════════════════════════════════════════ */

.form-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 32px;
}

.calc-form { max-width: 100%; }

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  margin-bottom: 6px;
  font-weight: 500;
}

.required { color: var(--color-primary); }
.optional { color: var(--color-text-lighter); font-size: 13px; font-weight: normal; }

.form-input {
  width: 100%;
  padding: 10px 14px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-on-dark);
  font-family: var(--font-body);
  font-size: 15px;
  transition: all var(--transition);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-gold);
  box-shadow: 0 0 0 3px rgba(207,159,58,0.1);
  background: rgba(255,255,255,0.08);
}

.form-input::placeholder { color: var(--color-text-lighter); }
.form-input:hover { border-color: rgba(207,159,58,0.4); }

/* ─── Radio buttons ─── */
.radio-group {
  display: flex;
  gap: 16px;
  padding: 8px 0;
}

.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 15px;
  color: var(--color-text-muted-on-dark);
}

.radio-label input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  position: relative;
  cursor: pointer;
  transition: all var(--transition);
}

.radio-label input[type="radio"]:checked {
  border-color: var(--color-primary);
  background: var(--color-primary);
}

.radio-label input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 6px; height: 6px;
  background: white;
  border-radius: 50%;
}

.radio-label span { transition: color var(--transition); }
.radio-label input[type="radio"]:checked ~ span { color: var(--color-text-on-dark); }

/* ─── Location input ─── */
.location-select-wrap { position: relative; }

.location-suggestions {
  display: none;
  position: absolute;
  top: 100%; left: 0; right: 0;
  background: var(--color-ink-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  max-height: 200px;
  overflow-y: auto;
  z-index: 100;
  margin-top: 2px;
}

.location-suggestions.active { display: block; }

.location-suggestion {
  padding: 10px 14px;
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  transition: background var(--transition);
  border-bottom: 1px solid rgba(255,255,255,0.03);
}

.location-suggestion:last-child { border-bottom: none; }
.location-suggestion:hover { background: rgba(255,255,255,0.08); color: var(--color-text-on-dark); }
.location-suggestion .highlight { color: var(--color-gold); }
.location-suggestion .province { font-size: 12px; color: var(--color-text-lighter); margin-left: 8px; }
.location-suggestion .coords { font-size: 11px; color: var(--color-text-lighter); margin-left: 8px; }

/* ─── Buttons ─── */
.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 15px;
  cursor: pointer;
  transition: all var(--transition);
  font-weight: 500;
}

.btn-large { padding: 12px 32px; font-size: 16px; }

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  box-shadow: 0 4px 12px rgba(200,30,30,0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(200,30,30,0.4);
}

.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: var(--color-text-muted-on-dark);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  color: var(--color-text-on-dark);
}

.btn-icon { font-size: 18px; }

.form-hint {
  font-size: 13px;
  color: var(--color-text-lighter);
  padding-top: 8px;
}

/* ═══════════════════════════════════════════════
   Results
   ═══════════════════════════════════════════════ */

.result-section {
  margin-top: 32px;
}

.result-loading {
  text-align: center;
  padding: 60px 20px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-gold);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin { to { transform: rotate(360deg); } }

.result-error {
  background: rgba(200,30,30,0.1);
  border: 1px solid rgba(200,30,30,0.3);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  color: var(--color-primary-light);
  margin-bottom: 24px;
}

/* ─── BaZi Result ─── */
.bazi-result-wrap {
  animation: fadeIn 0.5s ease;
}

/* Input info bar */
.result-input-info {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  padding: 16px 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.input-info-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.input-info-item .label {
  color: var(--color-text-lighter);
}

.input-info-item .value {
  color: var(--color-gold);
  font-weight: 500;
}

.input-info-item .value.correction {
  color: var(--color-text-muted-on-dark);
}

/* ─── Four Pillars Display ─── */
.pillars-display {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.pillar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  overflow: hidden;
  transition: all var(--transition);
}

.pillar-card:hover {
  border-color: rgba(207,159,58,0.3);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-red);
}

.pillar-header {
  padding: 10px;
  font-family: var(--font-heading);
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  background: rgba(255,255,255,0.03);
  letter-spacing: 2px;
  border-bottom: 1px solid var(--color-border);
}

.pillar-body {
  padding: 20px 16px;
}

.pillar-gan {
  font-size: 36px;
  font-family: var(--font-heading);
  color: var(--color-text-on-dark);
  line-height: 1.2;
}

.pillar-zhi {
  font-size: 28px;
  font-family: var(--font-heading);
  color: var(--color-gold);
  line-height: 1.3;
}

.pillar-element {
  font-size: 13px;
  color: var(--color-text-muted-on-dark);
  margin-top: 4px;
}

.pillar-ten-god {
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 20px;
  display: inline-block;
  margin-top: 8px;
  background: rgba(200,30,30,0.1);
  color: var(--color-primary-light);
  border: 1px solid rgba(200,30,30,0.2);
}

.pillar-ten-god.daymaster {
  background: rgba(207,159,58,0.15);
  color: var(--color-gold);
  border-color: rgba(207,159,58,0.3);
}

/* Day Master Highlight */
.daymaster-section {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 24px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 32px;
}

.daymaster-stem {
  font-family: var(--font-heading);
  font-size: 48px;
  color: var(--color-gold);
  line-height: 1;
}

.daymaster-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.daymaster-label {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
}

.daymaster-detail {
  font-size: 18px;
  color: var(--color-text-on-dark);
}

/* ─── Section Cards ─── */
.section-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 24px;
  overflow: hidden;
}

.section-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-heading);
  font-size: 16px;
  color: var(--color-gold);
  letter-spacing: 1px;
}

.section-card-header .icon { font-size: 18px; }

.section-card-body {
  padding: 20px;
}

/* ─── Data Table ─── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th, .data-table td {
  padding: 10px 14px;
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.data-table th {
  font-weight: 500;
  color: var(--color-text-muted-on-dark);
  font-size: 13px;
}

.data-table tr:last-child td { border-bottom: none; }

.data-table td:first-child {
  color: var(--color-text-muted-on-dark);
  font-weight: 500;
}

.data-table .ten-god-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
}

.ten-god-tag.bijian { background: rgba(39,174,96,0.15); color: #2ECC71; }
.ten-god-tag.jiecai { background: rgba(39,174,96,0.1); color: #58D68D; }
.ten-god-tag.shishen { background: rgba(207,159,58,0.15); color: var(--color-gold-light); }
.ten-god-tag.shangguan { background: rgba(207,159,58,0.1); color: #E8C86A; }
.ten-god-tag.piancai { background: rgba(41,128,185,0.15); color: #5DADE2; }
.ten-god-tag.zhengcai { background: rgba(41,128,185,0.1); color: #85C1E9; }
.ten-god-tag.pianyin { background: rgba(142,68,173,0.15); color: #AF7AC5; }
.ten-god-tag.zhengyin { background: rgba(142,68,173,0.1); color: #C39BD3; }
.ten-god-tag.qisha { background: rgba(200,30,30,0.15); color: var(--color-primary-light); }
.ten-god-tag.zhengguan { background: rgba(200,30,30,0.1); color: #E74C3C; }

/* ─── Hidden Stems ─── */
.hidden-stems-display {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.hidden-stem-item {
  text-align: center;
  padding: 12px;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-md);
}

.hidden-stem-branch {
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--color-text-muted-on-dark);
  margin-bottom: 8px;
}

.hidden-stem-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}

.hidden-stem {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 13px;
  background: rgba(255,255,255,0.05);
  color: var(--color-text-muted-on-dark);
}

/* ─── Da Yun ─── */
.dayun-timeline {
  position: relative;
  padding: 16px 0;
}

.dayun-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}

.dayun-item:last-child { border-bottom: none; }

.dayun-age {
  font-size: 13px;
  color: var(--color-text-lighter);
  min-width: 70px;
  font-family: var(--font-mono);
}

.dayun-ganzhi {
  font-family: var(--font-heading);
  font-size: 22px;
  color: var(--color-gold);
  min-width: 60px;
  text-align: center;
}

.dayun-range {
  font-size: 13px;
  color: var(--color-text-muted-on-dark);
}

.dayun-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-size: 12px;
  background: rgba(200,30,30,0.1);
  color: var(--color-primary-light);
}

/* ═══════════════════════════════════════════════
   Da Liu Ren Result
   ═══════════════════════════════════════════════ */

.daliuren-result-wrap {
  animation: fadeIn 0.5s ease;
}

/* Date info bar */
.dlr-info-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 16px 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.dlr-info-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
}

.dlr-info-item .label {
  color: var(--color-text-lighter);
}

.dlr-info-item .value {
  color: var(--color-gold);
  font-weight: 500;
}

/* ─── Question Bar ─── */
.dlr-question-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: rgba(207,159,58,0.06);
  border: 1px solid rgba(207,159,58,0.15);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.dlr-question-label {
  font-size: 14px;
  color: var(--color-gold);
  font-weight: 500;
  white-space: nowrap;
}

.dlr-question-text {
  font-size: 15px;
  color: var(--color-text-on-dark);
  font-family: var(--font-heading);
  letter-spacing: 1px;
}

/* ─── Tian Di Pan ─── */
.tiandipan-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
}

.td-item {
  padding: 10px 8px;
  text-align: center;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.05);
  transition: all var(--transition);
}

.td-item:hover {
  border-color: rgba(207,159,58,0.2);
  background: rgba(255,255,255,0.06);
}

.td-dizhi { font-size: 14px; color: var(--color-text-lighter); margin-bottom: 2px; }
.td-tianpan { font-family: var(--font-heading); font-size: 20px; color: var(--color-text-on-dark); }
.td-tianjiang { font-size: 12px; color: var(--color-gold); margin-top: 2px; }

/* ─── Si Ke (Four Lessons) ─── */
.sike-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.ke-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  padding: 16px 12px;
  transition: all var(--transition);
}

.ke-card:hover {
  border-color: rgba(207,159,58,0.2);
}

.ke-number {
  font-family: var(--font-heading);
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.ke-ganzhi {
  font-family: var(--font-heading);
  font-size: 24px;
  color: var(--color-gold);
  margin-bottom: 4px;
}

.ke-jiang {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
}

/* ─── San Chuan (Three Transmissions) ─── */
.sanchuan-display {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.chuan-card {
  border-radius: var(--radius-lg);
  padding: 24px 16px;
  text-align: center;
  border: 1px solid;
  transition: all var(--transition);
}

.chuan-card:hover {
  transform: translateY(-2px);
}

.chuan-card.chu { background: rgba(200,30,30,0.08); border-color: rgba(200,30,30,0.2); }
.chuan-card.zhong { background: rgba(207,159,58,0.08); border-color: rgba(207,159,58,0.2); }
.chuan-card.mo { background: rgba(41,128,185,0.08); border-color: rgba(41,128,185,0.2); }

.chuan-label {
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--color-text-muted-on-dark);
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.chuan-zhi {
  font-family: var(--font-heading);
  font-size: 36px;
  color: var(--color-text-on-dark);
  margin-bottom: 4px;
}

.chuan-jiang {
  font-size: 16px;
  color: var(--color-gold);
  margin-bottom: 4px;
}

.chuan-liuqin {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
}

.chuan-dungan {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  background: rgba(255,255,255,0.06);
  color: var(--color-text-lighter);
  margin-top: 4px;
}

.keti-badge {
  display: inline-block;
  padding: 8px 24px;
  border-radius: var(--radius-md);
  background: rgba(207,159,58,0.1);
  border: 1px solid rgba(207,159,58,0.25);
  color: var(--color-gold-light);
  font-family: var(--font-heading);
  font-size: 16px;
  letter-spacing: 2px;
  margin: 16px auto 0;
}

/* ─── Shen Sha (Spirit Killers) ─── */
.shensha-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 8px;
}

.shensha-item {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.04);
  font-size: 13px;
}

.shensha-name {
  color: var(--color-gold);
  font-weight: 500;
}

.shensha-zhi {
  color: var(--color-text-muted-on-dark);
  margin: 0 4px;
}

.shensha-desc {
  color: var(--color-text-lighter);
  font-size: 12px;
  margin-top: 2px;
}

/* ═══════════════════════════════════════════════
   Knowledge Page
   ═══════════════════════════════════════════════ */

.knowledge-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.knowledge-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.knowledge-card:hover {
  border-color: rgba(207,159,58,0.2);
}

.kc-header {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--color-border);
}

.kc-icon { font-size: 24px; }

.kc-header h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  color: var(--color-gold);
  letter-spacing: 2px;
}

.kc-body {
  padding: 24px;
}

.kc-body h4 {
  font-family: var(--font-heading);
  font-size: 16px;
  color: var(--color-text-on-dark);
  margin: 20px 0 8px;
  letter-spacing: 1px;
}

.kc-body h4:first-child { margin-top: 0; }

.kc-body p {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  line-height: 1.8;
  margin-bottom: 8px;
}

/* ─── Knowledge table ─── */
.kc-table-wrap {
  overflow-x: auto;
  margin: 12px 0;
}

.kc-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.kc-table th, .kc-table td {
  padding: 8px 12px;
  text-align: center;
  border: 1px solid var(--color-border);
}

.kc-table th {
  background: rgba(255,255,255,0.05);
  color: var(--color-gold);
  font-weight: 500;
}

.kc-table td {
  color: var(--color-text-muted-on-dark);
}

.kc-list {
  list-style: none;
  padding: 0;
}

.kc-list li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  line-height: 1.7;
}

.kc-list li::before { content: '• '; color: var(--color-gold); }

/* ─── Five Elements ─── */
.five-elements {
  text-align: center;
}

.element-cycle {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 24px;
}

.elem-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid color-mix(in srgb, var(--elem-color) 30%, transparent);
  background: color-mix(in srgb, var(--elem-color) 8%, transparent);
  min-width: 60px;
}

.elem-icon { font-size: 24px; }
.elem-name { font-family: var(--font-heading); font-size: 18px; color: var(--elem-color); }
.elem-direction { font-size: 11px; color: var(--color-text-lighter); }

.elem-arrow {
  font-size: 18px;
  color: var(--color-text-lighter);
  padding: 0 4px;
}

.element-control {
  padding: 16px;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-md);
}

.control-title {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  margin-bottom: 8px;
}

.control-items {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.control-items span {
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 13px;
  background: rgba(255,255,255,0.05);
  color: var(--color-text-muted-on-dark);
}

/* ═══════════════════════════════════════════════
   Footer
   ═══════════════════════════════════════════════ */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px;
  text-align: center;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-text {
  font-size: 13px;
  color: var(--color-text-lighter);
  margin-bottom: 4px;
}

.footer-copy {
  font-family: var(--font-heading);
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  letter-spacing: 2px;
}

/* ═══════════════════════════════════════════════
   AI Analysis & API Key
   ═══════════════════════════════════════════════ */

/* ─── Header API Key Button ─── */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.api-key-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.04);
  color: var(--color-text-muted-on-dark);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--transition);
}

.api-key-btn:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(207,159,58,0.3);
}

.key-icon { font-size: 14px; }

.key-status {
  font-size: 12px;
  color: var(--color-text-lighter);
}

.key-status.configured {
  color: var(--color-jade);
}

/* ─── Modal ─── */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.modal {
  background: var(--color-ink-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  width: 460px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  color: var(--color-gold);
  letter-spacing: 1px;
}

.modal-close {
  background: none;
  border: none;
  color: var(--color-text-lighter);
  font-size: 24px;
  cursor: pointer;
  padding: 0 4px;
  transition: color var(--transition);
}

.modal-close:hover { color: var(--color-text-on-dark); }

.modal-body {
  padding: 24px;
}

.modal-desc {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  margin-bottom: 20px;
  line-height: 1.6;
}

.api-key-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.api-key-input-wrap .form-input {
  padding-right: 44px;
  font-family: var(--font-mono);
  font-size: 14px;
}

.btn-icon-only {
  position: absolute;
  right: 8px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  padding: 4px;
  color: var(--color-text-lighter);
  transition: color var(--transition);
}

.btn-icon-only:hover { color: var(--color-text-on-dark); }

.api-key-tips {
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-md);
}

.api-key-tips p {
  font-size: 13px;
  color: var(--color-text-lighter);
  line-height: 1.8;
}

.api-key-tips a {
  color: var(--color-gold);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--color-border);
}

/* ─── AI Stream ─── */
.ai-stream-wrap {
  min-height: 60px;
}

.ai-stream-content {
  animation: fadeIn 0.2s ease;
}

.ai-stream-cursor::after {
  content: '▍';
  animation: blink 0.8s step-end infinite;
  color: var(--color-gold);
  margin-left: 2px;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ─── AI Section ─── */
.ai-section {
  margin-top: 24px;
}

.ai-loading {
  text-align: center;
  padding: 40px 20px;
}

.ai-actions {
  text-align: center;
  padding: 16px 0 4px;
}

.btn-ai {
  background: linear-gradient(135deg, #1a1a3e, #2d1b4e) !important;
  border: 1px solid rgba(207,159,58,0.3) !important;
  color: var(--color-gold-light) !important;
  font-size: 15px !important;
  padding: 12px 36px !important;
}

.btn-ai:hover {
  border-color: rgba(207,159,58,0.6) !important;
  box-shadow: 0 0 24px rgba(207,159,58,0.15) !important;
}

.btn-glow {
  animation: glowPulse 2s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 12px rgba(207,159,58,0.1); }
  50% { box-shadow: 0 0 24px rgba(207,159,58,0.2); }
}

/* ─── AI Analysis Content ─── */
.ai-analysis {
  padding: 4px 0;
}

.ai-analysis .ai-p {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  line-height: 1.9;
  margin-bottom: 12px;
}

.ai-analysis .ai-h4 {
  font-family: var(--font-heading);
  font-size: 17px;
  color: var(--color-gold);
  margin: 24px 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(207,159,58,0.15);
  letter-spacing: 2px;
}

.ai-analysis .ai-h5 {
  font-family: var(--font-heading);
  font-size: 15px;
  color: var(--color-text-on-dark);
  margin: 18px 0 8px;
  letter-spacing: 1px;
}

.ai-analysis .ai-h6 {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  margin: 14px 0 6px;
}

.ai-analysis strong {
  color: var(--color-gold-light);
  font-weight: 600;
}

.ai-analysis em {
  color: var(--color-text-muted-on-dark);
  font-style: italic;
}

.ai-analysis hr.ai-hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 20px 0;
}

.ai-analysis .ai-li {
  font-size: 14px;
  color: var(--color-text-muted-on-dark);
  line-height: 1.8;
  margin: 2px 0;
}

.ai-analysis .ai-ul {
  padding-left: 20px;
  margin: 8px 0;
}

.ai-analysis .ai-ul .ai-li {
  list-style: disc;
}

.ai-analysis .ai-ol {
  padding-left: 20px;
  margin: 8px 0;
}

.ai-analysis .ai-ol .ai-li {
  list-style: decimal;
}

.ai-analysis .ai-code {
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-muted-on-dark);
  overflow-x: auto;
  white-space: pre-wrap;
  margin: 12px 0;
}

/* ═══════════════════════════════════════════════
   Responsive Design
   ═══════════════════════════════════════════════ */

/* Tablet */
@media (max-width: 900px) {
  .quick-cards { grid-template-columns: repeat(2, 1fr); }
  .pillars-display { grid-template-columns: repeat(2, 1fr); }
  .hidden-stems-display { grid-template-columns: repeat(2, 1fr); }
  .sike-grid { grid-template-columns: repeat(2, 1fr); }
  .sanchuan-display { grid-template-columns: repeat(3, 1fr); }
  .knowledge-grid { grid-template-columns: 1fr; }
  .tiandipan-grid { grid-template-columns: repeat(4, 1fr); }
  .hero-title { font-size: 36px; }
}

/* Mobile */
@media (max-width: 640px) {
  .header-inner { padding: 0 16px; }
  .main-content { padding: 80px 16px 40px; }

  .main-nav {
    display: none;
    position: absolute;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    background: rgba(13,13,26,0.98);
    border-bottom: 1px solid var(--color-border);
    padding: 8px;
    gap: 0;
  }

  .main-nav.open { display: flex; }

  .nav-link {
    padding: 12px 16px;
    border-radius: 0;
  }

  .nav-toggle { display: block; }

  .api-key-btn .key-status { display: none; }
  .api-key-btn { padding: 6px 10px; }
  .modal { max-width: 95vw; }

  .quick-cards { grid-template-columns: 1fr; }
  .pillars-display { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .hidden-stems-display { grid-template-columns: repeat(2, 1fr); }
  .sike-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .sanchuan-display { grid-template-columns: 1fr; gap: 12px; }
  .tiandipan-grid { grid-template-columns: repeat(3, 1fr); }
  .knowledge-grid { grid-template-columns: 1fr; }
  .kc-table-wrap { overflow-x: auto; max-width: 100%; }
  .element-cycle { flex-wrap: wrap; justify-content: center; }
  .elem-arrow { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .form-section { padding: 20px; }

  .hero { padding: 48px 16px 40px; }
  .hero-title { font-size: 28px; letter-spacing: 4px; }
  .hero-subtitle { font-size: 16px; }
  .hero-seal { width: 60px; height: 60px; font-size: 28px; }

  .page-header h2 { font-size: 24px; }
  .daymaster-stem { font-size: 36px; }
  .result-input-info { flex-direction: column; gap: 8px; word-break: break-all; }
  .shensha-grid { grid-template-columns: 1fr; }
  .dlr-info-bar { flex-direction: column; gap: 6px; }
  .section-card-body { padding: 16px; overflow-x: hidden; }
  .sanchuan-display .chuan-card { padding: 16px 12px; }
  .data-table { font-size: 13px; }
  .data-table th, .data-table td { padding: 6px 8px; }
}