/* 91PORN官方网站 - 91-porn.cyou */
:root {
  --bg: #0a0a0e;
  --bg-elevated: #12121a;
  --bg-panel: #181822;
  --accent: #ff9900;
  --accent-soft: rgba(255, 153, 0, 0.14);
  --accent-2: #7b68ee;
  --accent-3: #ffb347;
  --text: #f4f4f7;
  --text-dim: #a0a0b5;
  --text-muted: #65657a;
  --border: #282836;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  --max: 1180px;
  --sidebar: 220px;
}

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

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

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
  max-width: 100%;
}

a { color: var(--accent-2); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent); }

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

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

.top-notice {
  background: linear-gradient(90deg, var(--accent) 0%, #e67e00 100%);
  color: #1a1000;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 7px 16px;
  letter-spacing: 0.02em;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: rgba(10, 10, 14, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  max-width: var(--max);
  margin: 0 auto;
}

.logo-link { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-link:hover { text-decoration: none; }
.logo-img { width: 44px; height: 44px; border-radius: 10px; }
.logo-text { font-size: 1.25rem; font-weight: 800; color: var(--text); letter-spacing: -0.02em; }
.logo-text em { color: var(--accent); font-style: normal; }

.nav-main { display: flex; gap: 4px; }
.nav-main a {
  color: var(--text-dim);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  text-decoration: none;
}
.nav-main a:hover, .nav-main a.active {
  color: var(--text);
  background: var(--bg-panel);
  text-decoration: none;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  padding: 0;
  background: var(--bg-panel);
  border: none;
  color: var(--text);
  border-radius: 12px;
  cursor: pointer;
  flex-shrink: 0;
}

.menu-bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 18px;
  height: 14px;
}

.menu-bars span {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.28s ease, opacity 0.2s ease;
}

.menu-toggle[aria-expanded="true"] .menu-bars span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-bars span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-bars span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.portal-hero {
  position: relative;
  overflow: hidden;
  padding: 48px 0 56px;
  background:
    radial-gradient(ellipse 80% 60% at 75% 15%, rgba(255, 153, 0, 0.1) 0%, transparent 55%),
    radial-gradient(ellipse 60% 50% at 10% 85%, rgba(123, 104, 238, 0.08) 0%, transparent 55%),
    var(--bg);
}

.portal-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 40px;
  align-items: center;
  position: relative;
}

.portal-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-soft);
  border: 1px solid rgba(255, 153, 0, 0.35);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.portal-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.portal-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.55rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}

.portal-hero h1 span { color: var(--accent); }

.portal-lead {
  color: var(--text-dim);
  font-size: 1.02rem;
  margin-bottom: 24px;
  max-width: 540px;
}

.portal-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.stat-chip {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  min-width: 100px;
}

.stat-chip strong {
  display: block;
  font-size: 1.1rem;
  color: var(--accent-3);
  line-height: 1.2;
}

.stat-chip span { font-size: 0.75rem; color: var(--text-muted); }

.portal-cta { display: flex; flex-wrap: wrap; gap: 12px; }

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--accent) 0%, #e67e00 100%);
  color: #1a1000;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(255, 153, 0, 0.3);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary:hover { color: #1a1000; transform: translateY(-2px); box-shadow: 0 6px 28px rgba(255, 153, 0, 0.4); text-decoration: none; }

.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 0.95rem;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s;
}
.btn-outline:hover { border-color: var(--accent); color: var(--text); text-decoration: none; }

.bento-mosaic {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: repeat(4, 72px);
  gap: 10px;
}

.bento-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: relative;
}

.bento-item img { width: 100%; height: 100%; object-fit: cover; object-position: top; }

.bento-item::after {
  content: attr(data-label);
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 6px 8px;
  background: linear-gradient(transparent, rgba(0,0,0,0.85));
  font-size: 0.68rem;
  color: #fff;
  text-align: center;
}

.bento-a { grid-column: 1 / 4; grid-row: 1 / 3; }
.bento-b { grid-column: 4 / 7; grid-row: 1 / 2; }
.bento-c { grid-column: 4 / 6; grid-row: 2 / 4; }
.bento-d { grid-column: 6 / 7; grid-row: 2 / 4; }
.bento-e { grid-column: 1 / 3; grid-row: 3 / 5; }
.bento-f { grid-column: 3 / 7; grid-row: 4 / 5; }

.guide-layout {
  display: grid;
  grid-template-columns: var(--sidebar) 1fr;
  gap: 32px;
  padding: 48px 0;
  align-items: start;
}

.guide-nav {
  position: sticky;
  top: 80px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 0;
}

.guide-nav h2 {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  padding: 0 16px 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 8px;
}

.guide-nav a {
  display: block;
  padding: 8px 16px;
  font-size: 0.88rem;
  color: var(--text-dim);
  border-left: 3px solid transparent;
  text-decoration: none;
}
.guide-nav a:hover, .guide-nav a.active {
  color: var(--text);
  background: var(--bg-panel);
  border-left-color: var(--accent);
  text-decoration: none;
}

.guide-panel { scroll-margin-top: 90px; margin-bottom: 48px; }

.panel-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.panel-num {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  -webkit-text-stroke: 1px var(--accent);
  color: transparent;
}

.panel-head h2 { font-size: 1.35rem; font-weight: 700; }
.panel-desc { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 20px; }

.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

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

.feature-card:hover { border-color: var(--accent); transform: translateY(-3px); }

.feature-card figure { aspect-ratio: 9/16; max-height: 280px; overflow: hidden; background: #000; }
.feature-card img { width: 100%; height: 100%; object-fit: cover; object-position: top; }

.feature-card .card-body { padding: 14px 16px; }
.feature-card h3 { font-size: 0.95rem; margin-bottom: 6px; }
.feature-card p { font-size: 0.82rem; color: var(--text-dim); line-height: 1.6; }

.cat-scroll-wrap { margin-bottom: 16px; }

.cat-scroll {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.cat-tile {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.cat-tile img { aspect-ratio: 9/14; object-fit: cover; object-position: top; width: 100%; }
.cat-tile figcaption { padding: 10px 12px; font-size: 0.82rem; font-weight: 600; }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tag-cloud span {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 0.78rem;
  padding: 4px 12px;
  border-radius: 20px;
}

.seo-article {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  margin: 20px 0 48px;
}

.seo-article h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}

.article-columns { column-count: 2; column-gap: 36px; }

.article-columns p {
  margin-bottom: 14px;
  color: var(--text-dim);
  font-size: 0.92rem;
  text-align: justify;
  break-inside: avoid;
}

.article-columns h3 {
  column-span: all;
  font-size: 1.05rem;
  color: var(--text);
  margin: 20px 0 10px;
  break-after: avoid;
}

.article-columns ul {
  column-span: all;
  margin: 0 0 14px 20px;
  color: var(--text-dim);
  font-size: 0.92rem;
}
.article-columns li { margin-bottom: 6px; }

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.step-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  position: relative;
}

.step-card::before {
  content: attr(data-step);
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #1a1000;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-card h3 { font-size: 0.9rem; margin-bottom: 8px; }
.step-card p { font-size: 0.8rem; color: var(--text-dim); }

.faq-section { margin-bottom: 48px; }
.faq-section h2 { font-size: 1.35rem; margin-bottom: 16px; }

.faq-list { display: flex; flex-direction: column; gap: 8px; }

.faq-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-item summary {
  padding: 14px 18px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.92rem;
  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(--accent); font-size: 1.2rem; }
.faq-item[open] summary::after { content: "−"; }

.faq-item .faq-body {
  padding: 0 18px 14px;
  font-size: 0.88rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.site-footer {
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  padding: 40px 0 24px;
  margin-top: 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 28px;
}

.footer-brand p { color: var(--text-dim); font-size: 0.85rem; margin-top: 10px; max-width: 340px; }

.footer-col h3 { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.08em; }
.footer-col a { display: block; color: var(--text-dim); font-size: 0.88rem; padding: 4px 0; text-decoration: none; }
.footer-col a:hover { color: var(--accent); text-decoration: none; }

.footer-keywords { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.footer-keywords a {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-panel);
  padding: 3px 10px;
  border-radius: 12px;
  text-decoration: none;
}
.footer-keywords a:hover { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-links { display: flex; flex-wrap: wrap; gap: 16px; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 0.82rem; }
.footer-links a:hover { color: var(--accent); text-decoration: none; }

.page-header {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  padding: 32px 0;
}

.breadcrumb { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 8px; }
.breadcrumb a { color: var(--text-dim); text-decoration: none; }
.page-header h1 { font-size: 1.75rem; }

.page-body { padding: 40px 0 60px; }

.legal-content h2 { font-size: 1.15rem; margin: 28px 0 12px; color: var(--text); }
.legal-content h3 { font-size: 1rem; margin: 16px 0 8px; }
.legal-content p, .legal-content li { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 12px; }
.legal-content ul, .legal-content ol { margin: 0 0 12px 24px; }

.error-page {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}

.error-code {
  font-size: 6rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 12px;
}

.error-page h1 { font-size: 1.5rem; margin-bottom: 12px; }
.error-page p { color: var(--text-dim); margin-bottom: 24px; max-width: 480px; margin-left: auto; margin-right: auto; }

@media (max-width: 960px) {
  .portal-grid { grid-template-columns: 1fr; gap: 28px; }
  .guide-layout { grid-template-columns: 1fr; gap: 0; padding: 32px 0; }
  .guide-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 8px;
    padding: 10px 0;
    margin: 0 0 24px;
    background: var(--bg);
    border: none;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    scrollbar-width: none;
  }
  .guide-nav::-webkit-scrollbar { display: none; }
  .guide-nav h2 { display: none; }
  .guide-nav a {
    flex-shrink: 0;
    white-space: nowrap;
    border-left: none;
    border-radius: 20px;
    padding: 8px 14px;
    font-size: 0.8rem;
    background: var(--bg-panel);
    border: 1px solid var(--border);
  }
  .guide-nav a:hover, .guide-nav a.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #1a1000;
  }
  .feature-row { grid-template-columns: 1fr 1fr; gap: 12px; }
  .cat-scroll { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .article-columns { column-count: 1; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .bento-mosaic { grid-template-columns: 1fr 1fr; grid-template-rows: auto; gap: 8px; }
  .bento-a { grid-column: 1 / -1; min-height: 320px; }
  .bento-b, .bento-c, .bento-d, .bento-e, .bento-f { grid-column: auto; grid-row: auto; min-height: 110px; }
}

@media (max-width: 640px) {
  html { font-size: 15px; }
  .container { padding: 0 16px; }
  .top-notice { font-size: 0.72rem; padding: 6px 12px; line-height: 1.4; }
  .menu-toggle { display: flex; }
  .header-inner { padding: 10px 16px; }
  .logo-img { width: 38px; height: 38px; }
  .logo-text { font-size: 1.1rem; }
  body.menu-open { overflow: hidden; }
  body.menu-open::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.62);
    backdrop-filter: blur(4px);
    z-index: 990;
  }
  .nav-main {
    position: fixed;
    top: var(--menu-top, 120px);
    left: 16px;
    right: 16px;
    transform: translateY(-10px);
    z-index: 1020;
    display: flex;
    flex-direction: column;
    gap: 0;
    background: #1c1c28;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 14px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    overflow: hidden;
    transition: opacity 0.22s ease, visibility 0.22s ease, transform 0.22s ease;
  }
  .nav-main.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
  }
  .nav-main::before {
    content: "网站导航";
    display: block;
    padding: 18px 20px 16px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    text-align: center;
    border-bottom: 1px solid var(--border);
  }
  .nav-main a {
    display: block;
    padding: 15px 22px;
    font-size: 0.92rem;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 0;
  }
  .nav-main a:last-child { border-bottom: none; }
  .nav-main a.active { color: #1a1000; background: var(--accent); }
  .portal-hero { padding: 24px 0 28px; }
  .portal-hero h1 { font-size: 1.55rem; }
  .portal-lead { font-size: 0.9rem; }
  .portal-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
  .portal-cta { flex-direction: column; }
  .portal-cta .btn-primary, .portal-cta .btn-outline { width: 100%; justify-content: center; }
  .bento-mosaic { grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
  .bento-a { grid-column: 1 / -1; aspect-ratio: 9/14; max-height: 420px; max-width: 240px; margin: 0 auto; }
  .bento-b, .bento-c, .bento-d, .bento-e, .bento-f { aspect-ratio: 9/14; }
  .feature-row { flex-direction: column; display: flex; gap: 10px; }
  .feature-card { display: flex; flex-direction: row; }
  .feature-card:hover { transform: none; }
  .feature-card figure { width: 88px; flex-shrink: 0; max-height: none; aspect-ratio: 9/14; }
  .feature-card .card-body { flex: 1; padding: 12px 14px; display: flex; flex-direction: column; justify-content: center; }
  .steps-grid { grid-template-columns: 1fr; padding-left: 20px; }
  .seo-article { padding: 20px 16px; }
  .site-footer { padding: 28px 0 20px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .error-code { font-size: 4.5rem; }
}

@media (max-width: 380px) {
  .bento-mosaic { grid-template-columns: 1fr 1fr; }
  .bento-b, .bento-c, .bento-d, .bento-e, .bento-f { display: none; }
  .bento-a { max-width: 200px; }
}