/* 滑雪装备 - 术语表风格样式 */
/* 主色调: #795548 (棕色) */

:root {
  --accent-color: #795548;
  --accent-light: #a1887f;
  --accent-dark: #5d4037;
  --bg-primary: #fafafa;
  --bg-secondary: #f5f5f5;
  --text-primary: #212121;
  --text-secondary: #616161;
  --text-muted: #9e9e9e;
  --border-color: #e0e0e0;
  --white: #ffffff;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-sm: 4px;
  --max-width: 1200px;
  --header-height: 64px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
}

a {
  color: var(--accent-color);
  text-decoration: none;
}

a:hover {
  color: var(--accent-dark);
}

/* Header */
.header {
  background: var(--white);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo::before {
  content: "❄";
  font-size: 24px;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s;
}

.nav a:hover,
.nav a.active {
  color: var(--accent-color);
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 8px 16px;
  width: 240px;
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  width: 100%;
  margin-left: 8px;
}

.search-box::before {
  content: "🔍";
  font-size: 14px;
  opacity: 0.5;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
  color: var(--white);
  padding: 64px 24px;
  text-align: center;
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
}

.hero p {
  font-size: 18px;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* A-Z Navigation */
.az-nav {
  background: var(--white);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 24px;
  position: sticky;
  top: var(--header-height);
  z-index: 99;
}

.az-nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px;
}

.az-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.az-nav a:hover,
.az-nav a.active {
  background: var(--accent-color);
  color: var(--white);
}

/* Main Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px;
}

/* Section Title */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent-color);
  display: inline-block;
}

/* Definition Item */
.definition-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.definition-item {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s;
}

.definition-item:hover {
  box-shadow: var(--shadow-hover);
}

.definition-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.definition-letter {
  width: 40px;
  height: 40px;
  background: var(--accent-color);
  color: var(--white);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
}

.definition-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

.definition-title a:hover {
  color: var(--accent-color);
}

.definition-category {
  font-size: 13px;
  color: var(--accent-color);
  background: rgba(121, 85, 72, 0.1);
  padding: 4px 10px;
  border-radius: 12px;
  margin-left: auto;
}

.definition-body {
  color: var(--text-secondary);
  line-height: 1.7;
}

.definition-body p {
  margin-bottom: 12px;
}

.definition-body p:last-child {
  margin-bottom: 0;
}

/* Related Terms */
.related-terms {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.related-terms-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.related-terms-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.related-term {
  font-size: 13px;
  color: var(--accent-color);
  background: rgba(121, 85, 72, 0.08);
  padding: 6px 12px;
  border-radius: 16px;
  transition: all 0.2s;
}

.related-term:hover {
  background: var(--accent-color);
  color: var(--white);
}

/* Source Cite */
.source-cite {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
}

/* Grid Layouts */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* Article List */
.article-section {
  margin-top: 48px;
}

.article-list {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.article-list h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.article-list ul {
  list-style: none;
}

.article-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.article-list li:last-child {
  border-bottom: none;
}

.article-list a {
  color: var(--text-primary);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-list a::before {
  content: "•";
  color: var(--accent-color);
  font-weight: bold;
}

.article-list a:hover {
  color: var(--accent-color);
}

/* Breadcrumb */
.breadcrumb {
  background: var(--bg-secondary);
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 14px;
  color: var(--text-secondary);
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb span {
  margin: 0 8px;
  color: var(--text-muted);
}

/* Article Detail */
.article-detail {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

.article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.article-header h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--text-secondary);
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-content h2 {
  font-size: 24px;
  font-weight: 600;
  margin: 32px 0 16px;
  color: var(--text-primary);
}

.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 24px 0 12px;
  color: var(--text-primary);
}

.article-content p {
  margin-bottom: 16px;
}

.article-content ul,
.article-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

/* Examples Box */
.examples-box {
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent-color);
  padding: 20px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 24px 0;
}

.examples-box h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: 12px;
}

.examples-box ul {
  margin: 0;
  padding-left: 20px;
}

/* 404 Page */
.error-page {
  text-align: center;
  padding: 80px 24px;
}

.error-code {
  font-size: 120px;
  font-weight: 700;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 16px;
  opacity: 0.8;
}

.error-title {
  font-size: 28px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.error-message {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-color);
  color: var(--white);
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 500;
  transition: background 0.2s;
}

.btn:hover {
  background: var(--accent-dark);
  color: var(--white);
}

/* Footer */
.footer {
  background: var(--accent-dark);
  color: var(--white);
  padding: 48px 24px 24px;
  margin-top: 64px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand p {
  font-size: 14px;
  opacity: 0.8;
  line-height: 1.7;
}

.footer-column h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: 10px;
}

.footer-column a {
  color: var(--white);
  opacity: 0.8;
  font-size: 14px;
  transition: opacity 0.2s;
}

.footer-column a:hover {
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  opacity: 0.6;
}

/* Responsive */
@media (max-width: 992px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 16px;
    gap: 12px;
  }

  .nav {
    order: 3;
    width: 100%;
    gap: 16px;
    justify-content: center;
  }

  .search-box {
    width: 100%;
    order: 2;
  }

  .hero {
    padding: 40px 16px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero p {
    font-size: 16px;
  }

  .az-nav {
    padding: 12px 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .az-nav-inner {
    flex-wrap: nowrap;
    justify-content: flex-start;
    min-width: max-content;
  }

  .az-nav a {
    width: 32px;
    height: 32px;
    font-size: 13px;
  }

  .container {
    padding: 24px 16px;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .definition-header {
    flex-wrap: wrap;
  }

  .definition-category {
    margin-left: 0;
    margin-top: 8px;
  }

  .article-detail {
    padding: 24px;
  }

  .article-header h1 {
    font-size: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .error-code {
    font-size: 80px;
  }
}