/* ============================================================
   人民币大写转换器 - 全局样式表
   版本: 1.0.0
   规范: 无框架依赖，纯手写CSS，适配SEO最佳实践
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --color-primary: #1a73e8;
  --color-primary-dark: #1557b0;
  --color-primary-light: #e8f0fe;
  --color-accent: #ea4335;
  --color-text: #202124;
  --color-text-secondary: #5f6368;
  --color-text-light: #80868b;
  --color-bg: #f8f9fa;
  --color-white: #ffffff;
  --color-border: #dadce0;
  --color-border-light: #e8eaed;
  --color-success: #0f9d58;
  --color-warning: #f9ab00;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --color-shadow-hover: rgba(0, 0, 0, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", "Courier New", monospace;
  --max-width: 1200px;
  --header-height: 60px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

ul, ol {
  list-style: none;
}

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 站点头部 ---------- */
.site-header {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px var(--color-shadow);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.site-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary) !important;
  letter-spacing: 0.5px;
}

.site-logo:hover {
  text-decoration: none;
  opacity: 0.85;
}

.site-nav {
  display: flex;
  gap: 8px;
}

.site-nav a {
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
}

.site-nav a:hover,
.site-nav a.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border-light);
  padding: 10px 0;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  font-size: 0.85rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  color: var(--color-text-light);
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin: 0 6px;
  color: var(--color-border);
}

.breadcrumb a {
  color: var(--color-text-secondary);
}

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

/* ---------- 主内容区 ---------- */
main.container {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  padding-top: 32px;
  padding-bottom: 48px;
  flex: 1;
}

/* 内页布局：main + aside 并排 */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  padding-top: 32px;
  padding-bottom: 48px;
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.page-layout main {
  min-width: 0;
}

/* ---------- 内容卡片 ---------- */
.content-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 8px var(--color-shadow);
  overflow: hidden;
}

.card-header {
  padding: 32px 32px 20px;
  border-bottom: 1px solid var(--color-border-light);
  text-align: center;
}

.card-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
}

.highlight-number {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: 2px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-weight: 700;
}

.subtitle {
  margin-top: 8px;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* ---------- 转换结果区 ---------- */
.result-section {
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.result-box {
  background: var(--color-bg);
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.result-box:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px var(--color-shadow-hover);
}

.result-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-light);
  margin-bottom: 12px;
  font-weight: 600;
}

.result-upper .result-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  word-break: break-all;
  letter-spacing: 2px;
  line-height: 1.6;
  min-height: 48px;
}

.result-lower .result-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  font-family: var(--font-mono);
  letter-spacing: 1px;
}

.btn-copy {
  margin-top: 12px;
  padding: 8px 20px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  font-family: var(--font-sans);
}

.btn-copy:hover {
  background: var(--color-primary-dark);
}

.btn-copy:active {
  transform: scale(0.96);
}

.btn-copy.copied {
  background: var(--color-success);
}

.btn-clear {
  margin-left: 8px;
  background: #5f6368 !important;
}

.btn-clear:hover {
  background: #444 !important;
}

/* 快速搜索输入框 */
.quick-search-wrapper {
  text-align: center;
  margin-bottom: 24px;
}

.quick-search-input {
  padding: 12px 18px;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  width: 260px;
  text-align: center;
  outline: none;
  font-family: var(--font-sans);
  transition: border-color 0.3s;
}

.quick-search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.quick-search-hint {
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* ---------- 财务说明区 ---------- */
.desc-section {
  padding: 0 32px 32px;
}

.desc-section h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.desc-content {
  background: #fefdf5;
  border-left: 4px solid var(--color-warning);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 20px;
  line-height: 1.8;
}

.desc-tips {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.desc-tips h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--color-text);
}

.desc-tips ul {
  list-style: disc;
  padding-left: 20px;
}

.desc-tips li {
  margin-bottom: 6px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---------- 页面导航 ---------- */
.page-navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  gap: 12px;
}

.nav-link {
  padding: 10px 20px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.9rem;
  transition: background 0.2s, transform 0.1s;
}

.nav-link:hover {
  background: var(--color-primary);
  color: var(--color-white);
  text-decoration: none;
}

.nav-link.disabled {
  background: var(--color-bg);
  color: var(--color-text-light);
  cursor: not-allowed;
}

.page-indicator {
  font-size: 0.85rem;
  color: var(--color-text-light);
  white-space: nowrap;
}

/* ---------- 相关推荐 ---------- */
.related-section {
  padding: 24px 32px 32px;
}

.related-section h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
}

.related-list li a {
  display: block;
  padding: 10px 14px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  text-align: center;
  transition: background 0.2s, color 0.2s;
  border: 1px solid transparent;
}

.related-list li a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-color: var(--color-primary);
  text-decoration: none;
}

/* ---------- 侧边栏 ---------- */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sidebar-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: 0 1px 4px var(--color-shadow);
}

.sidebar-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text);
}

.sidebar-nav li {
  margin-bottom: 2px;
}

.sidebar-nav li a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  transition: background 0.2s;
}

.sidebar-nav li a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

/* ---------- 站点页脚 ---------- */
.site-footer {
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: 40px 0 24px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border-light);
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.footer-col p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-col ul li {
  margin-bottom: 6px;
}

.footer-col ul li a {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.footer-col ul li a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: 16px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ---------- 首页特有样式 ---------- */
.hero-section {
  background: linear-gradient(135deg, #1a73e8 0%, #1557b0 100%);
  color: var(--color-white);
  padding: 60px 24px;
  text-align: center;
}

.hero-section h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.hero-section .hero-subtitle {
  font-size: 1.05rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* 首页输入工具区 */
.tool-section {
  padding: 40px 24px;
  max-width: 800px;
  margin: 0 auto;
}

.tool-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 20px var(--color-shadow);
  padding: 40px;
  margin-top: -40px;
  position: relative;
  z-index: 10;
}

.tool-card h2 {
  font-size: 1.35rem;
  text-align: center;
  margin-bottom: 8px;
  color: var(--color-text);
}

.tool-card .tool-desc {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.input-group {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.input-group input {
  flex: 1;
  padding: 14px 18px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1.1rem;
  font-family: var(--font-mono);
  transition: border-color 0.3s;
  outline: none;
}

.input-group input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.input-group button {
  padding: 14px 28px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s;
  font-family: var(--font-sans);
}

.input-group button:hover {
  background: var(--color-primary-dark);
}

.tool-result {
  margin-top: 24px;
  display: none;
}

.tool-result.show {
  display: block;
}

.tool-result .result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
}

.tool-result .result-row .label {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.tool-result .result-row .value {
  font-size: 1.1rem;
  font-weight: 600;
}

.tool-result .result-row .value.upper {
  color: var(--color-accent);
  letter-spacing: 1px;
}

.tool-result-actions {
  text-align: center;
  margin-top: 12px;
}

/* 首页规则速查区 */
.rules-section {
  padding: 60px 24px;
  background: var(--color-white);
}

.rules-section h2 {
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 40px;
  color: var(--color-text);
}

.rules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.rule-card {
  background: var(--color-bg);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
  transition: box-shadow 0.3s;
}

.rule-card:hover {
  box-shadow: 0 4px 16px var(--color-shadow-hover);
}

.rule-card .rule-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.rule-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--color-text);
}

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

/* 首页数字检索区 */
.search-section {
  padding: 60px 24px;
  background: var(--color-bg);
}

.search-section h2 {
  text-align: center;
  font-size: 1.5rem;
  margin-bottom: 32px;
}

.number-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 8px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.number-grid a {
  display: block;
  padding: 10px 8px;
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all 0.2s;
}

.number-grid a:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
}

/* 站点地图页 */
.sitemap-hero {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  box-shadow: 0 2px 8px var(--color-shadow);
  margin-bottom: 32px;
}

.sitemap-hero h1 {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.sitemap-intro {
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto 20px;
  line-height: 1.7;
}

.sitemap-stats {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.sitemap-stats span {
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
}

.sitemap-content {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 16px;
}

.sitemap-group {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: 0 1px 4px var(--color-shadow);
}

.sitemap-group h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
}

.sitemap-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
}

.sitemap-links li a {
  display: block;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  transition: background 0.2s;
}

.sitemap-links li a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
  text-decoration: none;
}

/* ---------- Toast 提示 ---------- */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  background: #333;
  color: #fff;
  padding: 12px 28px;
  border-radius: 24px;
  font-size: 0.9rem;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.toast.show {
  opacity: 1;
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  main.container {
    grid-template-columns: 1fr;
  }

  .page-layout {
    grid-template-columns: 1fr;
  }

  .result-section {
    grid-template-columns: 1fr;
  }

  .sidebar {
    order: 3;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-section h1 {
    font-size: 1.5rem;
  }

  .tool-card {
    padding: 24px;
    margin-top: -20px;
  }

  .input-group {
    flex-direction: column;
  }

  .page-navigation {
    flex-direction: column;
    text-align: center;
  }

  .related-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .sitemap-content {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .card-header {
    padding: 20px 16px 16px;
  }

  .card-header h1 {
    font-size: 1.25rem;
  }

  .result-section {
    padding: 16px;
  }

  .result-upper .result-value,
  .result-lower .result-value {
    font-size: 1.15rem;
  }

  .desc-section {
    padding: 0 16px 20px;
  }

  .related-section {
    padding: 16px 16px 24px;
  }

  .related-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .number-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}