/* 杏吧原创官网 - 全局样式 */
:root {
  --bg-primary: #0f0f1b;
  --bg-secondary: #1a1a2e;
  --bg-card: #1e1e32;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b8;
  --accent-pink: #ec4899;
  --accent-purple: #a855f7;
  --accent-orange: #f97316;
  --gradient-main: linear-gradient(135deg, #ec4899 0%, #a855f7 50%, #6366f1 100%);
  --border-color: #2d2d44;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --radius: 12px;
  --max-width: 1200px;
  --header-height: 64px;
}

*, *::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 {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 15, 27, 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);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.15rem;
}

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

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

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

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

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

/* Hero */
.hero {
  padding: 60px 0 40px;
  text-align: center;
  background: radial-gradient(ellipse at top, rgba(168, 85, 247, 0.15) 0%, transparent 60%);
}

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

.hero .subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 28px;
}

.btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
  background: var(--gradient-main);
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(236, 72, 153, 0.35);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent-purple);
  color: var(--accent-purple);
}

.btn-outline:hover {
  background: rgba(168, 85, 247, 0.1);
  color: var(--accent-purple);
}

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

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

.section-desc {
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 800px;
}

.section-alt {
  background: var(--bg-secondary);
}

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

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border-color);
  transition: transform 0.2s, border-color 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-purple);
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--accent-pink);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

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

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

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

.showcase-caption {
  padding: 16px 20px;
}

.showcase-caption h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.showcase-caption p {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* Content Article */
.article-content {
  max-width: 860px;
  margin: 0 auto;
}

.article-content h2 {
  font-size: 1.4rem;
  margin: 36px 0 14px;
  color: var(--accent-pink);
  padding-top: 12px;
}

.article-content h3 {
  font-size: 1.15rem;
  margin: 24px 0 10px;
  color: var(--text-primary);
}

.article-content p {
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
  margin: 0 0 16px 24px;
  color: var(--text-secondary);
}

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

.article-content a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* TOC */
.toc {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-bottom: 36px;
}

.toc h2 {
  font-size: 1.1rem;
  margin-bottom: 14px;
}

.toc ol {
  margin-left: 20px;
  color: var(--text-secondary);
}

.toc li {
  margin-bottom: 6px;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 32px 0;
}

.step-item {
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-item h4 {
  font-size: 0.95rem;
  margin-bottom: 6px;
}

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

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px 24px;
}

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

.faq-item p {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* Page Header */
.page-header {
  padding: 48px 0 32px;
  text-align: center;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
  font-size: 1.8rem;
  margin-bottom: 10px;
}

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

/* Legal Pages */
.legal-content {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.legal-content h2 {
  font-size: 1.25rem;
  margin: 32px 0 12px;
  color: var(--accent-pink);
}

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

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

/* Error Pages */
.error-page {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 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;
  margin-bottom: 16px;
}

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

.error-page p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* 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;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 360px;
}

.footer-links h4 {
  font-size: 0.95rem;
  margin-bottom: 14px;
  color: var(--text-primary);
}

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

.footer-links li {
  margin-bottom: 8px;
}

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

.footer-links a:hover {
  color: var(--accent-pink);
}

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

/* Breadcrumb */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

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

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

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

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

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

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

  .nav-main {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 16px 20px;
    gap: 0;
    border-bottom: 1px solid var(--border-color);
  }

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

  .nav-main li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-main li:last-child {
    border-bottom: none;
  }

  .hero {
    padding: 40px 0 28px;
  }

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

  .hero .subtitle {
    font-size: 0.95rem;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .section {
    padding: 32px 0;
  }

  .section-title {
    font-size: 1.3rem;
  }
}

@media (max-width: 480px) {
  .btn-group {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}