/* 91PORN官方网站 - PC & 移动端响应式 */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-card: #1a1a28;
  --accent-orange: #ff9900;
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: #2a2a3a;
  --gradient-main: linear-gradient(135deg, #ff9900 0%, #ec4899 55%, #8b5cf6 100%);
  --shadow: 0 4px 24px rgba(255, 153, 0, 0.15);
  --radius: 12px;
  --max-width: 1200px;
}

*, *::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-orange); text-decoration: none; transition: color 0.2s; }
a:hover { color: #ffb84d; }

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.logo-link { display: flex; align-items: center; gap: 12px; color: var(--text-primary); }
.logo-link img { width: 48px; height: 48px; border-radius: 10px; }
.logo-text { font-size: 1.2rem; font-weight: 700; }
.logo-text span { color: var(--accent-orange); }

.nav-desktop { display: flex; gap: 24px; list-style: none; }
.nav-desktop a { color: var(--text-secondary); font-size: 0.95rem; font-weight: 500; }
.nav-desktop a:hover, .nav-desktop a.active { color: var(--accent-orange); }

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: var(--gradient-main);
  color: #fff !important;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-download:hover { transform: translateY(-2px); box-shadow: var(--shadow); color: #fff !important; }

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1.4rem;
  cursor: pointer;
  padding: 6px 10px;
}

.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-secondary);
  position: relative;
  z-index: 2;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  padding: 12px 0;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  font-size: 1rem;
}
.nav-mobile a:last-child { border-bottom: none; }

.hero {
  padding: 60px 0 80px;
  background: radial-gradient(ellipse at 50% 0%, rgba(255, 153, 0, 0.1) 0%, transparent 60%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: 2.4rem;
  line-height: 1.3;
  margin-bottom: 20px;
  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; gap: 10px; margin-bottom: 28px; }
.badge {
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 10px 22px;
  border: 1px solid var(--border-color);
  border-radius: 50px;
  color: var(--text-primary) !important;
  font-weight: 500;
  transition: border-color 0.2s;
}
.btn-secondary:hover { border-color: var(--accent-orange); color: var(--accent-orange) !important; }

.hero-phone {
  position: relative;
  max-width: 320px;
  margin: 0 auto;
}
.hero-phone img {
  border-radius: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  border: 2px solid var(--border-color);
}

.section { padding: 70px 0; }
.section-alt { background: var(--bg-secondary); }
.section-title {
  font-size: 1.75rem;
  margin-bottom: 12px;
  text-align: center;
}
.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 48px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  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; max-height: 400px; }
.feature-card-body { padding: 20px; }
.feature-card h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--text-primary); }
.feature-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.category-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  transition: border-color 0.2s;
}
.category-item:hover { border-color: var(--accent-orange); }
.category-item h4 { font-size: 1rem; margin-bottom: 6px; }
.category-item p { font-size: 0.8rem; color: var(--text-muted); }

.content-article { max-width: 900px; margin: 0 auto; }
.content-article h2 {
  font-size: 1.5rem;
  margin: 40px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--accent-orange);
}
.content-article h3 { font-size: 1.2rem; margin: 28px 0 12px; color: var(--accent-orange); }
.content-article p { margin-bottom: 16px; color: var(--text-secondary); text-align: justify; }
.content-article ul, .content-article ol { margin: 12px 0 16px 24px; color: var(--text-secondary); }
.content-article li { margin-bottom: 8px; }

.showcase-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  align-items: center;
  margin: 48px 0;
}
.showcase-row.reverse { direction: rtl; }
.showcase-row.reverse > * { direction: ltr; }
.showcase-img img { border-radius: var(--radius); border: 1px solid var(--border-color); max-height: 560px; object-fit: contain; margin: 0 auto; }
.showcase-text h3 { font-size: 1.3rem; margin-bottom: 14px; }
.showcase-text p { color: var(--text-secondary); margin-bottom: 12px; }

.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-question {
  padding: 18px 22px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-answer {
  padding: 0 22px 18px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  display: none;
}
.faq-item.open .faq-answer { display: block; }
.faq-item.open .faq-question { color: var(--accent-orange); }

.cta-banner {
  background: var(--gradient-main);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
  margin: 48px 0;
}
.cta-banner h2 { font-size: 1.75rem; margin-bottom: 12px; color: #fff; }
.cta-banner p { color: rgba(255,255,255,0.85); margin-bottom: 24px; }

.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: 2rem; margin-bottom: 10px; }
.page-header p { color: var(--text-secondary); }

.legal-content {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}
.legal-content h2 { font-size: 1.3rem; margin: 32px 0 12px; color: var(--accent-orange); }
.legal-content h3 { font-size: 1.1rem; margin: 24px 0 10px; }
.legal-content p, .legal-content li { color: var(--text-secondary); margin-bottom: 12px; }
.legal-content ul, .legal-content ol { margin-left: 24px; margin-bottom: 16px; }
.legal-content .updated { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 32px; }

.error-page {
  min-height: 70vh;
  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;
}
.error-page h1 { font-size: 1.5rem; margin: 16px 0; }
.error-page p { color: var(--text-secondary); margin-bottom: 28px; }

.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 img { width: 56px; border-radius: 10px; margin-bottom: 12px; }
.footer-brand p { color: var(--text-muted); font-size: 0.9rem; 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-muted); font-size: 0.9rem; }
.footer-col a:hover { color: var(--accent-orange); }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--accent-orange); }

.internal-links {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  margin: 32px 0;
}
.internal-links h4 { margin-bottom: 14px; font-size: 1rem; }
.internal-links ul { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.internal-links a {
  padding: 6px 14px;
  background: var(--bg-secondary);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}
.internal-links a:hover { border-color: var(--accent-orange); color: var(--accent-orange); }

@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-desktop { display: none; }
  .menu-toggle { display: block; }
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero h1 { font-size: 1.75rem; }
  .hero-badges { justify-content: center; }
  .hero-actions { justify-content: center; }
  .hero-phone { order: -1; max-width: 260px; }
  .feature-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-row { grid-template-columns: 1fr; }
  .showcase-row.reverse { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 32px 20px; }
  .section { padding: 48px 0; }
}

@media (max-width: 480px) {
  .category-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.45rem; }
}