/* 91PORN 官方网站样式 - 91po.skin */
:root {
  --primary: #ff6600;
  --primary-dark: #e55a00;
  --bg-dark: #0a0a0a;
  --bg-card: #141414;
  --bg-card-hover: #1e1e1e;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #707070;
  --border: #2a2a2a;
  --accent-blue: #3b82f6;
  --gradient: linear-gradient(135deg, #ff6600 0%, #ff9933 100%);
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --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-dark);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
}

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

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(10,10,10,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo-link { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-link:hover { text-decoration: none; }
.logo-img { width: 48px; height: 48px; border-radius: 10px; }
.logo-text { font-size: 1.4rem; font-weight: 700; color: var(--text-primary); }
.logo-text span { color: var(--primary); }

.nav-main { display: flex; gap: 8px; align-items: center; }
.nav-main a {
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s;
}
.nav-main a:hover, .nav-main a.active {
  color: var(--text-primary);
  background: var(--bg-card);
  text-decoration: none;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient);
  color: #fff !important;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none !important;
  box-shadow: 0 4px 16px rgba(255,102,0,0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255,102,0,0.4);
  color: #fff !important;
}

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

/* Hero */
.hero {
  padding: 60px 0 80px;
  background: linear-gradient(180deg, #111 0%, var(--bg-dark) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,102,0,0.08) 0%, transparent 70%);
  pointer-events: none;
}

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

.hero-content h1 {
  font-size: 2.4rem;
  line-height: 1.3;
  margin-bottom: 20px;
  font-weight: 800;
}

.hero-content h1 em { color: var(--primary); font-style: normal; }

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.badge {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 6px 14px;
  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;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary) !important;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none !important;
  transition: background 0.2s;
}
.btn-secondary:hover { background: var(--bg-card-hover); color: var(--text-primary) !important; }

.hero-phone {
  display: flex;
  justify-content: center;
  position: relative;
}

.phone-frame {
  width: 280px;
  border-radius: 32px;
  border: 3px solid #333;
  overflow: hidden;
  box-shadow: var(--shadow), 0 0 60px rgba(255,102,0,0.1);
}

/* Sections */
.section { padding: 64px 0; }
.section-alt { background: #0f0f0f; }

.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; margin-bottom: 12px; }
.section-header p { color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.2s, border-color 0.2s;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: rgba(255,102,0,0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.feature-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); font-size: 0.95rem; }

/* Screenshot Gallery */
.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.screenshot-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform 0.2s;
}
.screenshot-item:hover { transform: scale(1.03); }

.screenshot-item img { width: 100%; aspect-ratio: 9/16; object-fit: cover; }
.screenshot-item figcaption {
  padding: 10px 12px;
  background: var(--bg-card);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: center;
}

/* Category Tags */
.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 40px;
}

.tag {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

.article-content h2 {
  font-size: 1.6rem;
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary);
}

.article-content h3 {
  font-size: 1.25rem;
  margin: 28px 0 12px;
  color: var(--primary);
}

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

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

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

.article-content .highlight-box {
  background: var(--bg-card);
  border-left: 4px solid var(--primary);
  padding: 20px 24px;
  margin: 24px 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* Page Header */
.page-header {
  padding: 48px 0 32px;
  background: linear-gradient(180deg, #111 0%, var(--bg-dark) 100%);
  border-bottom: 1px solid var(--border);
}

.page-header h1 { font-size: 2rem; margin-bottom: 8px; }
.page-header .breadcrumb {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.page-header .breadcrumb a { color: var(--text-secondary); }

.page-body { padding: 48px 0 80px; }

.legal-content h2 { font-size: 1.3rem; margin: 32px 0 12px; color: var(--text-primary); }
.legal-content h3 { font-size: 1.1rem; margin: 24px 0 10px; color: var(--primary); }
.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; }

/* CTA */
.cta-section {
  padding: 64px 0;
  text-align: center;
  background: linear-gradient(135deg, rgba(255,102,0,0.1) 0%, rgba(255,102,0,0.02) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.cta-section h2 { font-size: 1.8rem; margin-bottom: 12px; }
.cta-section p { color: var(--text-secondary); margin-bottom: 28px; }

/* Error Pages */
.error-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}

.error-code {
  font-size: 8rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  opacity: 0.8;
}

.error-page h1 { font-size: 1.8rem; margin: 16px 0; }
.error-page p { color: var(--text-secondary); margin-bottom: 32px; max-width: 480px; }

/* Footer */
.site-footer {
  background: #080808;
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
}

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

.footer-brand p { color: var(--text-muted); 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-muted); font-size: 0.9rem; text-decoration: none; }
.footer-col a:hover { color: var(--primary); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p { color: var(--text-muted); font-size: 0.85rem; }

.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--text-muted); font-size: 0.85rem; text-decoration: none; }
.footer-links a:hover { color: var(--primary); }

/* Download Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  position: relative;
}

.step-card::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--gradient);
  border-radius: 50%;
  font-weight: 700;
  margin: 0 auto 16px;
}

.step-card h3 { font-size: 1rem; margin-bottom: 8px; }
.step-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--primary); font-size: 1.2rem; }
.faq-item[open] summary::after { content: "−"; }

.faq-item .faq-answer {
  padding: 0 24px 18px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

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

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

  .nav-main {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10,10,10,0.98);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
  }

  .nav-main.open { display: flex; }
  .nav-main a { width: 100%; text-align: center; padding: 12px; }

  .header-inner .btn-download { display: none; }

  .hero { padding: 40px 0 60px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-phone { order: -1; }
  .phone-frame { width: 220px; }

  .feature-grid { grid-template-columns: 1fr; }
  .screenshot-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .steps-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .section { padding: 48px 0; }
  .section-header h2 { font-size: 1.5rem; }

  .error-code { font-size: 5rem; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 1.5rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions a { width: 100%; justify-content: center; }
  .screenshot-grid { grid-template-columns: 1fr 1fr; }
}