/* 91PO 91PORN官网 - 全局样式 */
:root {
  --primary: #ff3366;
  --primary-dark: #e62958;
  --bg-dark: #0d0d12;
  --bg-card: #16161f;
  --bg-section: #111118;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b80;
  --border: #2a2a38;
  --radius: 12px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --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;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  color: #ff6b8a;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 13, 18, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-link img {
  height: 40px;
  width: auto;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.main-nav {
  display: flex;
  gap: 8px;
  list-style: none;
}

.main-nav a {
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  transition: background 0.2s, color 0.2s;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text-primary);
  background: rgba(255, 51, 102, 0.12);
}

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

/* Hero */
.hero {
  background: linear-gradient(135deg, #1a0a10 0%, var(--bg-dark) 50%, #0a0a14 100%);
  padding: 80px 20px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(255, 51, 102, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
}

.hero h1 {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
}

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

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 32px;
}

.btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #ff6b35);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 51, 102, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255, 51, 102, 0.5);
  color: #fff;
}

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

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* Stats */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}

.stat-item {
  text-align: center;
  padding: 20px;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Sections */
main {
  flex: 1;
}

.section {
  padding: 60px 20px;
}

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

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

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  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(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.feature-card img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

.feature-card-body {
  padding: 20px;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

.content-article h2 {
  font-size: 1.5rem;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}

.content-article h3 {
  font-size: 1.2rem;
  margin: 28px 0 12px;
  color: var(--text-primary);
}

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

.content-article ul,
.content-article ol {
  margin: 12px 0 20px 24px;
  color: var(--text-secondary);
}

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

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

/* 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-question {
  padding: 18px 24px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--primary);
  transition: transform 0.3s;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s, padding 0.3s;
  color: var(--text-secondary);
}

.faq-item.open .faq-answer {
  padding: 0 24px 18px;
  max-height: 500px;
}

/* Download Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}

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

.step-num {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin: 0 auto 16px;
}

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

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

/* Breadcrumb */
.breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 20px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.breadcrumb span {
  margin: 0 8px;
}

/* Page Header */
.page-header {
  padding: 48px 20px 32px;
  text-align: center;
  background: var(--bg-section);
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  margin-bottom: 12px;
}

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

/* Footer */
.site-footer {
  background: var(--bg-section);
  border-top: 1px solid var(--border);
  padding: 48px 20px 24px;
  margin-top: auto;
}

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

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

.footer-brand img {
  height: 36px;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

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

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

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

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

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

/* Error Pages */
.error-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 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 12px;
}

.error-page p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 480px;
}

/* Internal Links Box */
.internal-links {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin: 40px 0;
}

.internal-links h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.internal-links ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.internal-links a {
  background: rgba(255, 51, 102, 0.1);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--primary);
}

.internal-links a:hover {
  background: rgba(255, 51, 102, 0.2);
}

/* Showcase Row - 图文交替展示 */
.showcase-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 64px;
}

.showcase-row:last-child {
  margin-bottom: 0;
}

.showcase-row.reverse .showcase-img {
  order: 2;
}

.showcase-row.reverse .showcase-text {
  order: 1;
}

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

.showcase-img img {
  width: 100%;
  aspect-ratio: 9/16;
  max-height: 560px;
  object-fit: cover;
  object-position: top center;
}

.showcase-text h3 {
  font-size: 1.4rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.showcase-text p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  text-align: justify;
  line-height: 1.8;
}

.showcase-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.showcase-tags span {
  background: rgba(255, 51, 102, 0.12);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
}

/* Screenshot Gallery */
.screenshot-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.screenshot-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s;
}

.screenshot-item:hover {
  transform: translateY(-4px);
}

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

.screenshot-item figcaption {
  padding: 14px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-align: center;
}

.screenshot-item figcaption strong {
  display: block;
  color: var(--text-primary);
  margin-bottom: 4px;
}

/* Hero Preview */
.hero-preview {
  max-width: 320px;
  margin: 40px auto 0;
  border-radius: 24px;
  overflow: hidden;
  border: 3px solid var(--border);
  box-shadow: 0 20px 60px rgba(255, 51, 102, 0.15);
}

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

/* Category Banner */
.category-banner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.category-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 16/10;
}

.category-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}

.category-card:hover img {
  transform: scale(1.05);
}

.category-card .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 40%, rgba(0,0,0,0.85));
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
}

.category-card .overlay h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.category-card .overlay p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* CTA Banner */
.cta-banner {
  background: linear-gradient(135deg, #1a0a10, #16161f);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px 40px;
  text-align: center;
  margin-top: 20px;
}

.cta-banner h2 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.cta-banner p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* Content + Image Side */
.content-img-block {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: start;
}

.content-img-block .side-img {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  position: sticky;
  top: 80px;
}

.content-img-block .side-img img {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
  object-position: top center;
}

/* Ads Bar */
.ads-bar {
  background: linear-gradient(180deg, #16161f 0%, var(--bg-dark) 100%);
  border-bottom: 1px solid var(--border);
  padding: 14px 20px 10px;
  position: sticky;
  top: 64px;
  z-index: 90;
}

.ads-bar .applist-title {
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

.ads-bar #ads {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 6px 4px;
  background: transparent;
  margin: 0 auto;
  max-width: var(--max-width);
}

.ads-bar #ads > div {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 76px;
  box-sizing: border-box;
}

.ads-bar #ads img {
  width: 62px;
  height: 62px;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(255, 51, 102, 0.2);
  transition: transform 180ms ease, box-shadow 180ms ease;
  display: block;
  border: 2px solid rgba(255, 51, 102, 0.15);
  background: #fff;
}

.ads-bar #ads a {
  display: inline-block;
  text-decoration: none;
  border-radius: 16px;
  padding: 2px;
}

.ads-bar #ads a:hover img,
.ads-bar #ads a:active img {
  transform: translateY(-3px) scale(1.06);
  box-shadow: 0 8px 24px rgba(255, 51, 102, 0.35);
  border-color: var(--primary);
}

.ads-bar #ads .caption {
  height: 16px;
  font-size: 11px;
  color: var(--text-secondary);
  text-align: center;
  max-width: 72px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 5px;
  line-height: 16px;
}

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

  .ads-bar {
    top: 64px;
    padding: 12px 12px 8px;
  }

  .ads-bar #ads > div {
    width: 72px;
  }

  .ads-bar #ads img {
    width: 58px;
    height: 58px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
  }

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

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

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

  .hero {
    padding: 60px 20px 40px;
  }

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

  .showcase-row.reverse .showcase-img,
  .showcase-row.reverse .showcase-text {
    order: unset;
  }

  .category-banner {
    grid-template-columns: 1fr;
  }

  .content-img-block {
    grid-template-columns: 1fr;
  }

  .content-img-block .side-img {
    position: static;
    max-width: 280px;
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }

  .stat-num {
    font-size: 1.5rem;
  }
}
nav{
  display: contents;
}