/* ==========================================
   凉山保险行业协会官网 - 全局设计系统
   Design: 彝族文化 (黑·红·金) — 漆器·火把·织锦
   ========================================== */

/* Google Fonts - Noto Serif SC for headings (authority), Noto Sans SC for body */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;600;700&family=Noto+Serif+SC:wght@400;500;600;700&display=swap');

/* CSS 变量定义 */
:root {
  /* 主色调 — 彝族漆器黑 */
  --color-primary: #7B1818;
  --color-primary-light: #9B2C2C;
  --color-primary-lighter: #FEF2F2;
  --color-primary-dark: #5B1010;

  /* 辅助色 — 彝族火焰红 */
  --color-secondary: #C41230;
  --color-secondary-light: #E53E56;

  /* 强调色 — 彝族丰收金 */
  --color-accent: #D4A520;
  --color-accent-light: #F0C850;
  --color-accent-dark: #B8860B;

  /* CTA色 */
  --color-cta: #C41230;
  --color-cta-hover: #9B2C2C;

  /* 功能色 */
  --color-success: #16a34a;
  --color-warning: #ea580c;
  --color-error: #dc2626;
  --color-info: #0284c7;

  /* 中性色阶 */
  --color-text-primary: #1C1412;
  --color-text-secondary: #4A3F3A;
  --color-text-tertiary: #8C7E75;
  --color-text-inverse: #ffffff;

  --color-bg-page: #FAF8F6;
  --color-bg-white: #ffffff;
  --color-bg-subtle: #F5F0EC;
  --color-bg-dark: #0A0A0A;
  --color-bg-dark-lighter: #1A1A1A;

  --color-border: #E8DED6;
  --color-border-light: #F2EDE8;
  --color-divider: #D4C8BE;

  /* 彝族纹样专用色 */
  --yi-black: #0A0A0A;
  --yi-red: #C41230;
  --yi-gold: #D4A520;
  --yi-gold-light: #F0C850;
  --yi-red-dark: #8B0A1E;

  /* 间距 - 4px 基数 */
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 20px;
  --spacing-6: 24px;
  --spacing-8: 32px;
  --spacing-10: 40px;
  --spacing-12: 48px;
  --spacing-16: 64px;
  --spacing-20: 80px;

  /* 字号 */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* 行高 */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  /* 字重 */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-xs: 0 1px 2px rgba(28, 20, 18, 0.04);
  --shadow-sm: 0 1px 3px rgba(28, 20, 18, 0.05), 0 1px 2px rgba(28, 20, 18, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(28, 20, 18, 0.06), 0 2px 4px -2px rgba(28, 20, 18, 0.04);
  --shadow-lg: 0 10px 25px -5px rgba(28, 20, 18, 0.08), 0 8px 10px -6px rgba(28, 20, 18, 0.04);
  --shadow-xl: 0 20px 40px -8px rgba(28, 20, 18, 0.12), 0 8px 16px -6px rgba(28, 20, 18, 0.06);
  --shadow-primary: 0 4px 14px rgba(196, 18, 48, 0.25);
  --shadow-gold: 0 4px 14px rgba(212, 165, 32, 0.15);

  /* 过渡 */
  --transition-fast: 150ms ease-out;
  --transition-base: 250ms ease-out;
  --transition-slow: 400ms ease-out;

  /* 容器 */
  --container-max: 1200px;
  --container-padding: 20px;

  /* 字体族 */
  --font-heading: 'Noto Serif SC', 'STSong', 'SimSun', serif;
  --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI",
               "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* ==========================================
   重置 & 基础
   ========================================== */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-page);
}

/* 链接 */
a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary);
}

/* 列表 */
ul, ol {
  list-style: none;
}

/* 图片 */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 按钮基础 */
button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}

/* 输入框基础 */
input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

/* 标题 */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5 { font-size: var(--text-base); }
h6 { font-size: var(--text-sm); }

/* ==========================================
   容器
   ========================================== */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* ==========================================
   按钮组件
   ========================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: 10px 24px;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 14px rgba(196, 18, 48, 0.3);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse);
  border-color: var(--color-secondary);
}

.btn-secondary:hover {
  background-color: #A00F28;
  border-color: #A00F28;
  color: var(--color-text-inverse);
  box-shadow: 0 4px 14px rgba(196, 18, 48, 0.3);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: 0 4px 14px rgba(196, 18, 48, 0.3);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-secondary);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--color-primary-lighter);
  color: var(--color-primary);
}

.btn-lg {
  padding: 14px 32px;
  font-size: var(--text-base);
}

.btn-sm {
  padding: 6px 16px;
  font-size: var(--text-xs);
}

/* ==========================================
   卡片组件
   ========================================== */

.card {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-6);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  border: 1px solid var(--color-border-light);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:hover {
  box-shadow: var(--shadow-lg);
}

/* ==========================================
   标签组件
   ========================================== */

.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  background-color: var(--color-primary-lighter);
  color: var(--color-primary);
}

.tag-accent {
  background-color: #FDF3D7;
  color: #8B6914;
}

/* ==========================================
   分割线
   ========================================== */

.divider {
  height: 1px;
  margin: var(--spacing-6) 0;
  background: var(--color-border);
}

/* ==========================================
   辅助工具类（已精简彝族纹样装饰）
   ========================================== */

/* 菱形网格暗纹背景 — 保留为唯一的纹理工具类 */
.yi-diamond-bg {
  position: relative;
}
.yi-diamond-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M20 4L36 20L20 36L4 20Z' fill='none' stroke='rgba(212,165,32,0.04)' stroke-width='1'/%3E%3C/svg%3E");
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

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

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }

.bg-white { background-color: var(--color-bg-white); }
.bg-subtle { background-color: var(--color-bg-subtle); }
.bg-page { background-color: var(--color-bg-page); }

/* 文本省略 */
.text-ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.text-ellipsis-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

.text-ellipsis-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 响应式工具 */
.hide-mobile { display: block; }
.show-mobile { display: none; }

@media (max-width: 768px) {
  .hide-mobile { display: none; }
  .show-mobile { display: block; }
}

/* 清除浮动 */
.clearfix::after {
  content: "";
  display: table;
  clear: both;
}

/* 无障碍 - 仅屏幕阅读器可见 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ==========================================
   滚动动画
   ========================================== */

.fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fade-in-up {
    opacity: 1;
    transform: none;
  }
}

/* ==========================================
   自定义滚动条
   ========================================== */

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

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

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-tertiary);
}

/* 选中文字样式 */
::selection {
  background-color: rgba(196, 18, 48, 0.15);
  color: var(--color-text-primary);
}

/* ==========================================
   全局装饰性背景纹理（彝族几何纹样）
   ========================================== */

.bg-pattern {
  position: relative;
}

.bg-pattern::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(196, 18, 48, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(212, 165, 32, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(196, 18, 48, 0.02) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}