/**
 * 天机阁统一设计系统
 * Tianji Design System
 * 
 * 使用方式：在 HTML 的 <head> 中引入此文件
 * <link rel="stylesheet" href="assets/css/tianji-design-system.css">
 */

/* ========================================
   CSS 变量定义
   ======================================== */
:root {
  /* 主色调 - 金色系 */
  --tj-gold-primary: #d4af37;
  --tj-gold-dark: #b8960c;
  --tj-gold-light: #f4e4c1;
  --tj-gold-pale: #faf6ed;
  
  /* 背景色 - 深色渐变 */
  --tj-bg-dark: #0a0a0f;
  --tj-bg-mid: #1a1a2e;
  --tj-bg-light: #16213e;
  
  /* 文字颜色 */
  --tj-text-primary: #2a2520;
  --tj-text-secondary: #5a5040;
  --tj-text-light: rgba(255, 255, 255, 0.9);
  --tj-text-muted: rgba(255, 255, 255, 0.6);
  
  /* 强调色 */
  --tj-accent-red: #8b0000;
  --tj-accent-green: #4caf50;
  
  /* 边框和阴影 */
  --tj-border-radius-sm: 8px;
  --tj-border-radius-md: 15px;
  --tj-border-radius-lg: 25px;
  --tj-border-radius-xl: 30px;
  
  --tj-shadow-sm: 0 4px 15px rgba(0, 0, 0, 0.1);
  --tj-shadow-md: 0 8px 25px rgba(0, 0, 0, 0.15);
  --tj-shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);
  --tj-shadow-gold: 0 4px 20px rgba(212, 175, 55, 0.3);
  --tj-shadow-gold-lg: 0 8px 30px rgba(212, 175, 55, 0.4);
  
  /* 间距 */
  --tj-space-xs: 8px;
  --tj-space-sm: 15px;
  --tj-space-md: 25px;
  --tj-space-lg: 40px;
  --tj-space-xl: 60px;
  
  /* 字体 */
  --tj-font-primary: 'Noto Serif SC', 'ZCOOL XiaoWei', 'SimSun', serif;
  --tj-font-mono: 'Courier New', monospace;
  
  /* 动画 */
  --tj-transition-fast: 0.2s ease;
  --tj-transition-normal: 0.3s ease;
  --tj-transition-slow: 0.5s ease;
  
  /* 布局 */
  --tj-container-max: 900px;
  --tj-container-padding: 20px;
}

/* ========================================
   基础重置
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--tj-font-primary);
  line-height: 1.8;
  color: var(--tj-text-light);
  background: linear-gradient(135deg, var(--tj-bg-dark) 0%, var(--tj-bg-mid) 50%, var(--tj-bg-light) 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ========================================
   排版系统
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.4;
  color: var(--tj-gold-primary);
}

h1 { font-size: clamp(28px, 5vw, 36px); letter-spacing: 0.3em; }
h2 { font-size: clamp(22px, 4vw, 28px); letter-spacing: 0.15em; }
h3 { font-size: clamp(18px, 3vw, 22px); letter-spacing: 0.1em; }

p {
  margin-bottom: var(--tj-space-md);
}

/* ========================================
   组件 - 按钮
   ======================================== */
.tj-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--tj-space-xs);
  padding: 15px 40px;
  font-size: 16px;
  font-family: var(--tj-font-primary);
  font-weight: 600;
  letter-spacing: 0.1em;
  border: none;
  border-radius: var(--tj-border-radius-xl);
  cursor: pointer;
  transition: all var(--tj-transition-normal);
  text-decoration: none;
}

.tj-btn-primary {
  background: linear-gradient(135deg, var(--tj-gold-primary), var(--tj-gold-dark));
  color: var(--tj-bg-dark);
  box-shadow: var(--tj-shadow-gold);
}

.tj-btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--tj-shadow-gold-lg);
}

.tj-btn-secondary {
  background: transparent;
  color: var(--tj-gold-primary);
  border: 2px solid var(--tj-gold-primary);
}

.tj-btn-secondary:hover {
  background: rgba(212, 175, 55, 0.1);
  transform: translateY(-2px);
}

.tj-btn-sm {
  padding: 10px 25px;
  font-size: 14px;
}

/* ========================================
   组件 - 卡片
   ======================================== */
.tj-card {
  background: linear-gradient(135deg, 
    rgba(250, 247, 240, 0.98) 0%,
    rgba(245, 240, 230, 0.99) 100%
  );
  border-radius: var(--tj-border-radius-md);
  padding: var(--tj-space-lg);
  box-shadow: var(--tj-shadow-lg), 0 0 0 1px rgba(212, 175, 55, 0.2);
  position: relative;
  overflow: hidden;
}

.tj-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    transparent 0%,
    var(--tj-gold-primary) 20%,
    var(--tj-gold-dark) 50%,
    var(--tj-gold-primary) 80%,
    transparent 100%
  );
}

/* ========================================
   组件 - 输入框
   ======================================== */
.tj-input {
  width: 100%;
  padding: var(--tj-space-sm) var(--tj-space-md);
  font-size: 16px;
  font-family: var(--tj-font-primary);
  background: rgba(26, 26, 46, 0.8);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: var(--tj-border-radius-md);
  color: var(--tj-text-light);
  transition: all var(--tj-transition-normal);
  resize: vertical;
}

.tj-input:focus {
  outline: none;
  border-color: var(--tj-gold-primary);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.tj-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

/* ========================================
   装饰元素
   ======================================== */
.tj-glow {
  animation: tjGlow 3s ease-in-out infinite;
}

@keyframes tjGlow {
  0%, 100% { text-shadow: 0 0 10px rgba(212, 175, 55, 0.5); }
  50% { text-shadow: 0 0 30px rgba(212, 175, 55, 0.8); }
}

.tj-float {
  animation: tjFloat 6s ease-in-out infinite;
}

@keyframes tjFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.tj-fade-in {
  animation: tjFadeIn 0.8s ease-out;
}

@keyframes tjFadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========================================
   布局工具
   ======================================== */
.tj-container {
  max-width: var(--tj-container-max);
  margin: 0 auto;
  padding: var(--tj-space-lg) var(--tj-container-padding);
}

.tj-flex {
  display: flex;
}

.tj-flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.tj-flex-column {
  display: flex;
  flex-direction: column;
}

.tj-text-center {
  text-align: center;
}

/* ========================================
   头部组件
   ======================================== */
.tj-header {
  text-align: center;
  margin-bottom: var(--tj-space-xl);
  padding: var(--tj-space-lg) 0;
  border-bottom: 2px solid rgba(212, 175, 55, 0.3);
}

.tj-header-icon {
  font-size: 48px;
  color: var(--tj-gold-primary);
  margin-bottom: var(--tj-space-sm);
}

.tj-header h1 {
  margin-bottom: var(--tj-space-xs);
}

.tj-header-subtitle {
  color: var(--tj-text-muted);
  font-size: 14px;
  letter-spacing: 0.2em;
}

/* ========================================
   页脚组件
   ======================================== */
.tj-footer {
  text-align: center;
  margin-top: var(--tj-space-xl);
  padding: var(--tj-space-lg) 0;
  color: var(--tj-text-muted);
  font-size: 14px;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
}

.tj-footer a {
  color: var(--tj-text-muted);
  text-decoration: none;
  margin: 0 var(--tj-space-sm);
  transition: color var(--tj-transition-fast);
}

.tj-footer a:hover {
  color: var(--tj-gold-primary);
}

/* ========================================
   响应式断点
   ======================================== */
@media (max-width: 768px) {
  :root {
    --tj-space-lg: 30px;
    --tj-space-xl: 40px;
  }
  
  h1 { letter-spacing: 0.2em; }
  h2 { letter-spacing: 0.1em; }
  
  .tj-btn {
    width: 100%;
    max-width: 300px;
  }
  
  .tj-card {
    padding: var(--tj-space-md);
  }
}

/* ========================================
   打印样式
   ======================================== */
@media print {
  body {
    background: white !important;
    color: black !important;
  }
  
  .tj-card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
  
  .tj-btn {
    display: none;
  }
}

/* ========================================
   滚动条美化
   ======================================== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(212, 175, 55, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--tj-gold-primary), var(--tj-gold-dark));
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--tj-gold-dark);
}

/* ========================================
   选择文本颜色
   ======================================== */
::selection {
  background: rgba(212, 175, 55, 0.3);
  color: var(--tj-text-primary);
}
