/* 杏吧官方平台 - xbs.autos 响应式样式 */
:root {
  --bg-primary: #0d0d14;
  --bg-secondary: #161622;
  --bg-card: #1c1c2a;
  --text-primary: #f0f0f5;
  --text-secondary: #a8a8b8;
  --accent-pink: #ff2d75;
  --accent-purple: #9b59f5;
  --accent-gold: #f5c842;
  --gradient-main: linear-gradient(135deg, #ff2d75 0%, #9b59f5 100%);
  --border-color: #2a2a3a;
  --max-width: 1200px;
  --header-height: 64px;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
}

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

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 13, 20, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-link:hover {
  color: var(--text-primary);
}

.logo-link img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 28px;
}

.main-nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px 8px;
}

/* Hero */
.hero {
  padding: 60px 0 40px;
  background: radial-gradient(ellipse at top, rgba(155, 89, 245, 0.15) 0%, transparent 60%);
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.2rem;
  line-height: 1.3;
  margin-bottom: 16px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 32px;
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Sections */
section {
  padding: 48px 0;
}

.section-title {
  font-size: 1.6rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.section-subtitle {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 0.95rem;
}

.content-block {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
  border: 1px solid var(--border-color);
}

.content-block h2 {
  font-size: 1.3rem;
  margin-bottom: 16px;
  color: var(--accent-pink);
}

.content-block h3 {
  font-size: 1.1rem;
  margin: 20px 0 12px;
  color: var(--text-primary);
}

.content-block p {
  margin-bottom: 14px;
  color: var(--text-secondary);
}

.content-block ul,
.content-block ol {
  margin: 12px 0 14px 24px;
  color: var(--text-secondary);
}

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

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 32px 0;
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-card img {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
  object-position: top;
}

.feature-card-body {
  padding: 16px;
}

.feature-card-body h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.feature-card-body p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Two Column Layout */
.two-col {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

.sidebar-box {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border-color);
  margin-bottom: 20px;
}

.sidebar-box h3 {
  font-size: 1rem;
  margin-bottom: 14px;
  color: var(--accent-gold);
}

.sidebar-box ul {
  list-style: none;
}

.sidebar-box li {
  margin-bottom: 10px;
}

.sidebar-box a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.sidebar-box a:hover {
  color: var(--accent-pink);
}

/* Image Showcase */
.showcase-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin: 24px 0;
}

.showcase-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.showcase-item img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  object-position: top;
}

.showcase-caption {
  padding: 16px;
}

.showcase-caption h4 {
  font-size: 0.95rem;
  margin-bottom: 6px;
}

.showcase-caption p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding: 20px 0;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.faq-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Page Header (sub pages) */
.page-header {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 32px;
}

.page-header h1 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.page-header p {
  color: var(--text-secondary);
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

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

/* Footer */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
  margin-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

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

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

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Error Pages */
.error-page {
  min-height: calc(100vh - var(--header-height) - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}

.error-code {
  font-size: 6rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.error-page h1 {
  font-size: 1.5rem;
  margin: 16px 0 12px;
}

.error-page p {
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  background: var(--gradient-main);
  color: #fff;
  border-radius: 8px;
  font-weight: 600;
  transition: opacity 0.2s;
}

.btn:hover {
  opacity: 0.9;
  color: #fff;
}

/* Legal pages */
.legal-content h2 {
  font-size: 1.2rem;
  margin: 28px 0 12px;
  color: var(--accent-pink);
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content p,
.legal-content li {
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.legal-content ul {
  margin-left: 24px;
  margin-bottom: 16px;
}

.update-date {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 24px;
}

/* Internal link highlight */
.internal-link {
  color: var(--accent-purple);
  border-bottom: 1px dashed var(--accent-purple);
}

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

  .two-col {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

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

/* Responsive - Mobile */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    display: none;
  }

  .main-nav.open {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 0;
    padding: 0 20px;
  }

  .main-nav li {
    border-bottom: 1px solid var(--border-color);
  }

  .main-nav a {
    display: block;
    padding: 14px 0;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .hero {
    padding: 40px 0 24px;
  }

  section {
    padding: 32px 0;
  }

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

  .showcase-row {
    grid-template-columns: 1fr;
  }

  .content-block {
    padding: 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .error-code {
    font-size: 4rem;
  }
}