/* ============================================================================
 * 大衍 · 易经双色球 · 东方玄学 × AI 科技感 主题
 * ============================================================================
 * 设计语言：深空蓝 + 朱砂红 + 青色光晕 + 玻璃态
 * 文化符号：印章、卦象、宋体（保留）
 * 科技元素：粒子、网格、渐变发光、数据流
 * ============================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;700&family=Noto+Serif+SC:wght@400;500;700&display=swap');

:root {
  /* ===== 主色调 ===== */
  --color-zhu: #dc2626;              /* 朱砂红 - 文化主色 */
  --color-zhu-bright: #ef4444;       /* 朱砂亮红 */
  --color-zhu-deep: #991b1b;         /* 朱砂深红 */

  /* 科技辅色 */
  --color-cyan: #06b6d4;             /* 青色 - AI 主调 */
  --color-cyan-bright: #22d3ee;      /* 亮青 */
  --color-purple: #a855f7;           /* 紫罗兰 - 神秘 */
  --color-gold: #f59e0b;             /* 金色 - 装饰 */

  /* 背景渐变 */
  --bg-deep: #050816;                /* 深空黑 */
  --bg-primary: #0a0e27;             /* 主背景 */
  --bg-secondary: #131830;           /* 次背景 */
  --bg-card: rgba(15, 23, 42, 0.5);  /* 玻璃态卡片 */
  --bg-card-hover: rgba(30, 41, 59, 0.7);
  --bg-card-solid: #1e293b;

  /* 边框 */
  --border-glass: rgba(148, 163, 184, 0.15);
  --border-accent: rgba(220, 38, 38, 0.4);
  --border-cyan: rgba(6, 182, 212, 0.4);

  /* 文字 */
  --text-primary: #e0e7ff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #22d3ee;

  /* 字体 */
  --font-serif: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  --font-sans: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', monospace;

  /* 阴影 */
  --shadow-glow-red: 0 0 20px rgba(220, 38, 38, 0.4), 0 0 40px rgba(220, 38, 38, 0.2);
  --shadow-glow-cyan: 0 0 20px rgba(6, 182, 212, 0.4), 0 0 40px rgba(6, 182, 212, 0.2);
  --shadow-glow-purple: 0 0 20px rgba(168, 85, 247, 0.4);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.5);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
}

/* ============================================================================
 * 全局重置
 * ============================================================================ */

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== 背景层 ===== */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse at top, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(220, 38, 38, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(168, 85, 247, 0.06) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-primary) 50%, var(--bg-secondary) 100%);
  z-index: -3;
}

/* 网格背景 */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(rgba(6, 182, 212, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.04) 1px, transparent 1px);
  background-size: 50px 50px;
  z-index: -2;
  pointer-events: none;
}

/* 浮动粒子 */
.particles {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-cyan);
  box-shadow: 0 0 10px var(--color-cyan);
  opacity: 0.6;
  animation: float 15s infinite linear;
}

.particle:nth-child(2) {
  background: var(--color-zhu);
  box-shadow: 0 0 10px var(--color-zhu);
  animation-duration: 20s;
  left: 20%;
}

.particle:nth-child(3) {
  background: var(--color-purple);
  box-shadow: 0 0 10px var(--color-purple);
  animation-duration: 18s;
  left: 40%;
}

.particle:nth-child(4) {
  animation-duration: 25s;
  left: 60%;
}

.particle:nth-child(5) {
  background: var(--color-gold);
  box-shadow: 0 0 10px var(--color-gold);
  animation-duration: 22s;
  left: 80%;
}

@keyframes float {
  0% { transform: translateY(100vh) translateX(0); opacity: 0; }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { transform: translateY(-10vh) translateX(50px); opacity: 0; }
}

/* ============================================================================
 * 排版基础
 * ============================================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

a {
  color: var(--text-accent);
  text-decoration: none;
  transition: all 0.2s;
}

a:hover {
  color: var(--color-cyan-bright);
  text-shadow: 0 0 10px var(--color-cyan);
}

/* ============================================================================
 * 布局容器
 * ============================================================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
  position: relative;
}

/* ============================================================================
 * 头部 / 导航
 * ============================================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 8, 22, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
}

.site-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.site-logo:hover {
  color: var(--color-zhu-bright);
  text-shadow: none;
}

/* 印章 */
.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-zhu) 0%, var(--color-zhu-deep) 100%);
  color: #fef3c7;
  border-radius: 6px;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  position: relative;
  box-shadow:
    0 0 0 2px rgba(254, 243, 199, 0.3),
    0 4px 12px rgba(220, 38, 38, 0.4),
    0 0 30px rgba(220, 38, 38, 0.3);
  animation: seal-pulse 3s ease-in-out infinite;
}

@keyframes seal-pulse {
  0%, 100% { box-shadow: 0 0 0 2px rgba(254, 243, 199, 0.3), 0 4px 12px rgba(220, 38, 38, 0.4), 0 0 30px rgba(220, 38, 38, 0.3); }
  50% { box-shadow: 0 0 0 2px rgba(254, 243, 199, 0.3), 0 4px 12px rgba(220, 38, 38, 0.4), 0 0 50px rgba(220, 38, 38, 0.5); }
}

/* 导航 */
.site-nav {
  display: flex;
  gap: 0.5rem;
}

.site-nav a {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all 0.2s;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-cyan-bright);
  background: rgba(6, 182, 212, 0.1);
  text-shadow: 0 0 8px var(--color-cyan);
}

/* ============================================================================
 * 玻璃态卡片
 * ============================================================================ */

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-cyan), transparent);
  opacity: 0.5;
}

.glass-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-cyan);
}

/* ============================================================================
 * 按钮（科技感）
 * ============================================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

/* 主按钮：朱砂红 + 发光 */
.btn-primary {
  background: linear-gradient(135deg, var(--color-zhu) 0%, var(--color-zhu-deep) 100%);
  color: #fef3c7;
  box-shadow: var(--shadow-glow-red);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(220, 38, 38, 0.6), 0 0 60px rgba(220, 38, 38, 0.3);
  color: #fff;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

/* 次按钮：青色边框 */
.btn-secondary {
  background: rgba(6, 182, 212, 0.1);
  color: var(--color-cyan-bright);
  border: 1px solid var(--border-cyan);
}

.btn-secondary:hover {
  background: rgba(6, 182, 212, 0.2);
  box-shadow: var(--shadow-glow-cyan);
  transform: translateY(-2px);
}

/* 大号 CTA */
.cta-btn {
  font-size: 1.05rem;
  padding: 1rem 2.5rem;
  letter-spacing: 0.05em;
}

/* ============================================================================
 * 首页 Hero
 * ============================================================================ */

.hero {
  padding: 6rem 0 4rem;
  text-align: center;
  position: relative;
}

/* 标签 */
.hero-tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid var(--border-cyan);
  border-radius: 100px;
  color: var(--color-cyan-bright);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.2);
}

.hero-tag::before {
  content: '◆';
  margin-right: 0.5rem;
  color: var(--color-cyan-bright);
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero h1 {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--color-zhu-bright) 50%, var(--color-cyan-bright) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 0.05em;
  line-height: 1.1;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--color-zhu-bright) 0%, var(--color-gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  display: inline-block;
}

.hero h1 .accent::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-zhu-bright), transparent);
  box-shadow: 0 0 10px var(--color-zhu-bright);
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

/* 数字大字（大衍之数） */
.big-numbers {
  margin: 3rem 0;
  font-family: var(--font-mono);
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 700;
  line-height: 1;
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 1rem;
}

.big-numbers .num-49 {
  background: linear-gradient(135deg, var(--color-zhu-bright) 0%, var(--color-gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 30px rgba(220, 38, 38, 0.5));
  animation: number-float 3s ease-in-out infinite;
}

.big-numbers .num-50 {
  color: var(--text-muted);
  font-size: 0.5em;
  text-decoration: line-through;
  opacity: 0.5;
}

.big-numbers .label {
  font-size: 0.18em;
  color: var(--text-muted);
  font-family: var(--font-serif);
  letter-spacing: 0.2em;
  display: block;
  margin-top: 1rem;
}

@keyframes number-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ============================================================================
 * 老师卡片（玻璃态）
 * ============================================================================ */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: radial-gradient(circle at top right, rgba(6, 182, 212, 0.1), transparent 50%);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow-red);
}

.card-emoji {
  font-size: 3rem;
  margin-bottom: 0.8rem;
  filter: drop-shadow(0 0 10px rgba(220, 38, 38, 0.3));
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.card-subtitle {
  font-size: 0.85rem;
  color: var(--color-cyan-bright);
  font-family: var(--font-mono);
  margin-bottom: 0.6rem;
  letter-spacing: 0.05em;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* AI 标签 */
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(168, 85, 247, 0.2));
  border: 1px solid var(--border-cyan);
  border-radius: 100px;
  font-size: 0.7rem;
  color: var(--color-cyan-bright);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.ai-badge-cyan {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.25), rgba(34, 211, 238, 0.15));
  border-color: var(--color-cyan);
}

.ai-badge::before {
  content: 'AI';
  font-weight: 700;
  color: var(--color-gold);
}

/* ============================================================================
 * 典籍卡片
 * ============================================================================ */

.classic-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.classic-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-zhu), var(--color-cyan), var(--color-purple));
  opacity: 0;
  transition: opacity 0.3s;
}

.classic-card:hover::after {
  opacity: 1;
}

.classic-card:hover {
  border-color: var(--border-cyan);
  transform: translateY(-3px);
}

.classic-quote {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.7;
  margin: 1rem 0;
  padding-left: 1rem;
  border-left: 3px solid;
  border-image: linear-gradient(180deg, var(--color-zhu), var(--color-cyan)) 1;
  background: linear-gradient(90deg, rgba(6, 182, 212, 0.05), transparent);
  border-radius: 0 4px 4px 0;
  padding: 0.8rem 1rem;
}

.classic-source {
  font-size: 0.85rem;
  color: var(--color-cyan-bright);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

/* ============================================================================
 * 表单（玻璃态 + 发光输入框）
 * ============================================================================ */

.form-section {
  max-width: 640px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-weight: 500;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.form-group label::before {
  content: '◆ ';
  color: var(--color-zhu-bright);
  font-size: 0.6em;
}

.form-input,
.form-select {
  width: 100%;
  padding: 0.85rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: var(--font-sans);
  transition: all 0.2s;
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-cyan);
  background: rgba(6, 182, 212, 0.05);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1), var(--shadow-glow-cyan);
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* 性别选择 */
.gender-group {
  display: flex;
  gap: 1rem;
}

.gender-option {
  flex: 1;
  padding: 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  font-weight: 500;
}

.gender-option:hover {
  border-color: var(--border-cyan);
}

.gender-option.active {
  background: rgba(220, 38, 38, 0.15);
  border-color: var(--color-zhu);
  color: var(--color-zhu-bright);
  box-shadow: var(--shadow-glow-red);
}

/* 时辰网格 */
.hour-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 0.5rem;
  max-height: 240px;
  overflow-y: auto;
  padding: 0.5rem;
  background: rgba(15, 23, 42, 0.4);
  border-radius: var(--radius-sm);
}

.hour-option {
  padding: 0.5rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: 4px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.85rem;
  font-family: var(--font-mono);
}

.hour-option:hover {
  border-color: var(--border-cyan);
}

.hour-option.active {
  background: rgba(6, 182, 212, 0.2);
  border-color: var(--color-cyan);
  color: var(--color-cyan-bright);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.3);
}

/* 老师选择 */
.master-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
}

.master-option {
  padding: 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.master-option:hover {
  border-color: var(--border-accent);
  background: rgba(220, 38, 38, 0.05);
}

.master-option.active {
  background: rgba(220, 38, 38, 0.15);
  border-color: var(--color-zhu);
  box-shadow: var(--shadow-glow-red);
}

.master-option .emoji {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 0.3rem;
}

.master-option .name {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--text-primary);
  display: block;
}

.master-option .desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: block;
  margin-top: 0.2rem;
}

/* ============================================================================
 * 结果页（核心展示）
 * ============================================================================ */

.result-section {
  max-width: 720px;
  margin: 0 auto;
}

/* 号码展示 */
.numbers-display {
  display: flex;
  gap: 0.8rem;
  justify-content: center;
  flex-wrap: wrap;
  margin: 2rem 0;
}

.ball {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.4rem;
  position: relative;
  transition: all 0.3s;
}

.ball-red {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: #fef3c7;
  box-shadow:
    0 4px 16px rgba(220, 38, 38, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.3),
    inset 0 -1px 0 rgba(0, 0, 0, 0.2);
  border: 2px solid #fca5a5;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.ball-blue {
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  color: #fff;
  box-shadow:
    0 4px 16px rgba(59, 130, 246, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.3),
    inset 0 -1px 0 rgba(0, 0, 0, 0.2);
  border: 2px solid #93c5fd;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.ball:hover {
  transform: scale(1.1) rotate(5deg);
}

.ball-plus {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  width: auto;
  box-shadow: none;
}

/* 卦象 SVG 容器 */
.hexagram-display {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin: 2rem 0;
  text-align: center;
}

.hexagram-svg {
  max-width: 200px;
  margin: 0 auto;
}

/* 解读文本 */
.interpretation {
  background: linear-gradient(135deg, rgba(220, 38, 38, 0.05), rgba(6, 182, 212, 0.05));
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  margin: 2rem 0;
  line-height: 1.9;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--text-primary);
  position: relative;
}

.interpretation::before {
  content: '"';
  position: absolute;
  top: -10px;
  left: 20px;
  font-size: 4rem;
  color: var(--color-zhu-bright);
  font-family: var(--font-serif);
  line-height: 1;
  opacity: 0.4;
}

/* 操作按钮组 */
.action-bar {
  display: flex;
  gap: 0.8rem;
  margin: 2rem 0;
  flex-wrap: wrap;
}

.action-btn {
  flex: 1;
  min-width: 120px;
  padding: 0.85rem 1.2rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
}

.action-btn:hover {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--border-cyan);
  transform: translateY(-2px);
}

.action-btn.primary {
  background: rgba(220, 38, 38, 0.15);
  border-color: var(--color-zhu);
  color: var(--color-zhu-bright);
}

.action-btn.primary:hover {
  background: rgba(220, 38, 38, 0.25);
  box-shadow: var(--shadow-glow-red);
}

/* ============================================================================
 * 提示 / 通知
 * ============================================================================ */

.notice {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-sm);
  padding: 1rem 1.2rem;
  margin: 1.5rem 0;
  font-size: 0.88rem;
  color: var(--text-primary);
  line-height: 1.7;
}

.notice strong {
  color: var(--color-gold);
}

/* ============================================================================
 * 页脚
 * ============================================================================ */

.site-footer {
  margin-top: 4rem;
  padding: 3rem 1.5rem 2rem;
  border-top: 1px solid var(--border-glass);
  background: rgba(5, 8, 22, 0.5);
  text-align: center;
}

.site-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.seal-big {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--color-zhu) 0%, var(--color-zhu-deep) 100%);
  color: #fef3c7;
  border-radius: 8px;
  font-family: var(--font-serif);
  font-size: 1.8rem;
  letter-spacing: 0.1em;
  margin: 0 auto;
  box-shadow:
    0 0 0 3px rgba(254, 243, 199, 0.3),
    0 6px 20px rgba(220, 38, 38, 0.5);
}

.footer-links {
  margin: 1.5rem 0 1rem;
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-disclaimer {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 1rem;
}

/* ============================================================================
 * 底部常驻提示
 * ============================================================================ */

.disclaimer-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.5rem 1rem;
  background: linear-gradient(90deg, rgba(220, 38, 38, 0.9), rgba(168, 85, 247, 0.9));
  color: #fff;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 500;
  z-index: 99;
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.3);
  letter-spacing: 0.05em;
}

/* ============================================================================
 * 响应式
 * ============================================================================ */

@media (max-width: 768px) {
  .section { padding: 3rem 0; }
  .hero { padding: 4rem 0 3rem; }
  .site-header-inner { gap: 1rem; flex-wrap: wrap; }
  .site-nav { gap: 0.25rem; }
  .site-nav a { padding: 0.4rem 0.7rem; font-size: 0.88rem; }
  .container { padding: 0 1rem; }
  .glass-card { padding: 1.5rem; }
  .disclaimer-bar { font-size: 0.72rem; }
  .ball { width: 48px; height: 48px; font-size: 1.1rem; }
}

/* ============================================================================
 * 工具类
 * ============================================================================ */

.text-center { text-align: center; }
.text-gradient {
  background: linear-gradient(135deg, var(--color-zhu-bright) 0%, var(--color-cyan-bright) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }

/* 数据流动画 */
@keyframes data-flow {
  0% { background-position: 0 0; }
  100% { background-position: 100% 0; }
}

.data-line {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-cyan), transparent);
  background-size: 50% 100%;
  background-repeat: no-repeat;
  animation: data-flow 3s linear infinite;
  opacity: 0.6;
}

/* ============================================================================
 * 滚动条
 * ============================================================================ */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--color-cyan), var(--color-zhu));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--color-cyan-bright), var(--color-zhu-bright));
}

/* ============================================================================
 * 选中文字
 * ============================================================================ */

::selection {
  background: rgba(220, 38, 38, 0.4);
  color: #fff;
}

/* ============================================================================
 * 结果页专属（号码 / 卦象 / 解读 / 老师切换）
 * ============================================================================ */

.numbers-display {
  text-align: center;
  margin: 2rem 0;
  padding: 2rem 1rem;
}

.numbers-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.numbers-balls {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.ball {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--color-zhu-bright) 0%, var(--color-zhu-deep) 100%);
  box-shadow:
    0 4px 16px rgba(220, 38, 38, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.3),
    inset 0 -1px 0 rgba(0, 0, 0, 0.2);
  border: 2px solid rgba(252, 165, 165, 0.6);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  transition: all 0.3s;
}

.ball.blue {
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  box-shadow:
    0 4px 16px rgba(59, 130, 246, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.3),
    inset 0 -1px 0 rgba(0, 0, 0, 0.2);
  border: 2px solid rgba(147, 197, 253, 0.6);
  width: 64px;
  height: 64px;
  font-size: 1.75rem;
}

.ball:hover {
  transform: scale(1.1) rotate(5deg);
}

.ball-sep {
  color: var(--text-muted);
  font-size: 1.5rem;
  margin: 0 0.25rem;
}

.master-tabs {
  display: flex;
  gap: 0.5rem;
  margin: 1.5rem 0 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.master-tab {
  padding: 0.5rem 1.1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1.5px solid var(--border-glass);
  border-radius: 100px;
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 500;
  transition: all 0.2s;
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.master-tab:hover {
  border-color: var(--color-cyan);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
}

.master-tab.active {
  background: linear-gradient(135deg, rgba(220, 38, 38, 0.25), rgba(6, 182, 212, 0.15));
  color: var(--color-zhu-bright);
  border-color: var(--color-zhu);
  box-shadow: var(--shadow-glow-red);
}

.master-tab .tab-emoji { margin-right: 0.3rem; }

.interpretation-box {
  background: linear-gradient(135deg, rgba(220, 38, 38, 0.05), rgba(6, 182, 212, 0.05));
  border: 1px solid var(--border-glass);
  border-left: 4px solid var(--color-zhu);
  border-radius: var(--radius-md);
  padding: 2rem 2.25rem;
  margin: 1.5rem 0;
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-primary);
  white-space: pre-wrap;
  font-family: var(--font-serif);
  position: relative;
}

.interpretation-box::before {
  content: '"';
  position: absolute;
  top: -8px;
  left: 12px;
  font-family: var(--font-serif);
  font-size: 3rem;
  color: var(--color-zhu-bright);
  opacity: 0.5;
  line-height: 1;
}

.interpretation-loading {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

.spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-glass);
  border-top-color: var(--color-cyan-bright);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 1rem;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
}

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

.qigua-info {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
  padding: 1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.qigua-info span strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* action-bar */
.action-bar {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}

.classics-cta {
  display: block;
  text-align: center;
  padding: 0.85rem 1rem;
  margin: 1rem 0;
  background: rgba(6, 182, 212, 0.08);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-sm);
  color: var(--color-cyan-bright);
  text-decoration: none;
  font-size: 0.92rem;
  transition: all 0.2s;
}

.classics-cta:hover {
  background: rgba(6, 182, 212, 0.15);
  color: var(--color-cyan-bright);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
}

/* 表单（起卦页） */
.form-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 2rem;
  margin: 1.5rem auto;
  max-width: 640px;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.92rem;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
  font-weight: 500;
}

.form-group input[type="date"],
.form-group input[type="time"],
.form-group input[type="text"] {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  transition: all 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.form-hint {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
}

.radio-group {
  display: flex;
  gap: 0.75rem;
}

.radio-group label {
  flex: 1;
  padding: 0.75rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
}

.radio-group label:hover {
  border-color: var(--color-cyan);
}

.radio-group label.checked {
  background: rgba(220, 38, 38, 0.15);
  border-color: var(--color-zhu);
  color: var(--color-zhu-bright);
  box-shadow: var(--shadow-glow-red);
}

.radio-group input { display: none; }

.checkbox-group {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  padding: 1rem;
  background: rgba(6, 182, 212, 0.06);
  border: 1px solid var(--border-cyan);
  border-radius: var(--radius-sm);
  margin: 1rem 0;
}

.checkbox-group input[type="checkbox"] {
  margin-top: 0.25rem;
  accent-color: var(--color-cyan);
}

.checkbox-group label {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-primary);
}

.submit-btn {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(135deg, var(--color-zhu) 0%, var(--color-zhu-deep) 100%);
  border: 1px solid var(--color-zhu);
  border-radius: var(--radius-sm);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.05em;
}

.submit-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-red);
}

.submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.form-step {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.form-step.active {
  color: var(--color-cyan-bright);
}

.form-step.done {
  color: var(--text-secondary);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-glass);
  font-size: 0.85rem;
}

.form-step.active .step-num {
  background: var(--color-cyan);
  color: var(--bg-deep);
  border-color: var(--color-cyan);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.4);
}

.form-step.done .step-num {
  background: var(--color-zhu);
  color: #fff;
  border-color: var(--color-zhu);
}

/* 页面头部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(5, 8, 22, 0.7);
  border-bottom: 1px solid var(--border-glass);
}

.site-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
}

.site-logo .seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-zhu) 0%, var(--color-zhu-deep) 100%);
  color: #fef3c7;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 700;
  box-shadow:
    0 0 0 2px rgba(254, 243, 199, 0.2),
    0 4px 12px rgba(220, 38, 38, 0.4);
}

.site-nav {
  display: flex;
  gap: 0.5rem;
}

.site-nav a {
  padding: 0.5rem 0.95rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.site-nav a:hover {
  color: var(--color-cyan-bright);
  background: rgba(6, 182, 212, 0.08);
}

.site-nav a.active {
  color: var(--color-zhu-bright);
  background: rgba(220, 38, 38, 0.12);
  border: 1px solid var(--border-accent);
}

/* 主容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Section 通用 */
.section {
  padding: 4rem 0;
}

.section h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}

.section-sub {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* Hero 区块 */
.hero {
  padding: 6rem 0 4rem;
  text-align: center;
  position: relative;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero-sub {
  margin-bottom: 2rem;
}

/* CTA 按钮 */
.cta-btn {
  display: inline-block;
  padding: 0.95rem 2rem;
  background: linear-gradient(135deg, var(--color-zhu) 0%, var(--color-zhu-deep) 100%);
  color: #fff;
  text-decoration: none;
  border-radius: 100px;
  font-size: 1rem;
  font-weight: 600;
  margin: 0.5rem;
  box-shadow: var(--shadow-glow-red);
  transition: all 0.2s;
  letter-spacing: 0.05em;
  border: 1px solid rgba(252, 165, 165, 0.3);
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(220, 38, 38, 0.6);
}

.cta-btn-secondary {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-cyan);
  color: var(--color-cyan-bright);
  box-shadow: 0 0 16px rgba(6, 182, 212, 0.3);
}

.cta-btn-secondary:hover {
  background: rgba(6, 182, 212, 0.1);
  box-shadow: 0 0 24px rgba(6, 182, 212, 0.5);
}

/* 卡片网格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.card-grid .card.selected {
  border-color: var(--color-zhu);
  box-shadow: var(--shadow-glow-red);
  background: rgba(220, 38, 38, 0.08);
}

.card-emoji {
  font-size: 2.2rem;
  display: block;
  margin-bottom: 0.5rem;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  letter-spacing: 0.05em;
}

.card-subtitle {
  font-size: 0.82rem;
  color: var(--color-cyan-bright);
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 广告位 */
.ad-slot {
  margin: 2rem auto;
  padding: 1.25rem;
  background: rgba(15, 23, 42, 0.4);
  border: 1px dashed var(--border-glass);
  border-radius: var(--radius-sm);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

/* 关于页 */
.about-content {
  max-width: 760px;
  margin: 2rem auto;
  padding: 2.5rem;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
}

.about-content h3 {
  font-family: var(--font-serif);
  color: var(--color-zhu-bright);
  font-size: 1.2rem;
  margin: 1.5rem 0 0.75rem;
  letter-spacing: 0.05em;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-glass);
}

.about-content h3:first-child {
  margin-top: 0;
}

.about-content p {
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 0.75rem;
  font-size: 0.95rem;
}

.about-content strong {
  color: var(--color-cyan-bright);
}

/* Toast 提示 */
.toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 0.85rem 1.5rem;
  background: rgba(15, 23, 42, 0.95);
  color: #fff;
  border: 1px solid var(--color-cyan);
  border-radius: var(--radius-sm);
  z-index: 9999;
  box-shadow: 0 0 24px rgba(6, 182, 212, 0.4);
  font-size: 0.95rem;
  animation: toast-in 0.3s ease-out;
}

@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, -40%); }
  to   { opacity: 1; transform: translate(-50%, -50%); }
}

/* AI 徽章变体 */
.ai-badge-purple {
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.2), rgba(220, 38, 38, 0.15));
  border-color: var(--color-purple);
  color: #d8b4fe;
}

.ai-badge-purple::before {
  color: var(--color-purple);
}

.ai-badge-gold {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(220, 38, 38, 0.15));
  border-color: var(--color-gold);
  color: #fcd34d;
}

.ai-badge-gold::before {
  color: var(--color-gold);
}