/* ========================================
   重口社视频社区 - 全站样式表
   品牌：重口社 | 域名：zr659.cn
   ======================================== */

/* CSS Variables */
:root {
  --primary: #c41e3a;
  --primary-dark: #9b1830;
  --secondary: #1a1a2e;
  --accent: #e94560;
  --dark: #0f0f23;
  --dark-alt: #16213e;
  --light: #f8f9fa;
  --gray: #6c757d;
  --gray-light: #e9ecef;
  --white: #ffffff;
  --gold: #d4a843;
  --shadow: 0 4px 20px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.2);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  background: var(--dark);
  color: var(--light);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 20px; }

/* ========== Header & Navigation ========== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(15, 15, 35, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(228, 69, 96, 0.2);
  transition: var(--transition);
}
.site-header.scrolled { background: rgba(15, 15, 35, 0.98); box-shadow: var(--shadow); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; max-width: 1400px; margin: 0 auto;
}
.logo-link { display: flex; align-items: center; gap: 10px; }
.logo-img { height: 45px; width: auto; }
.logo-text { font-size: 1.5rem; font-weight: 800; color: var(--white); letter-spacing: 2px; }
.logo-text span { color: var(--primary); }

/* Main Nav */
.main-nav { display: flex; align-items: center; gap: 0; }
.main-nav a {
  color: var(--light); padding: 10px 16px; font-size: 0.95rem;
  font-weight: 500; position: relative; white-space: nowrap;
}
.main-nav a::after {
  content: ''; position: absolute; bottom: 0; left: 50%; width: 0;
  height: 2px; background: var(--primary); transition: var(--transition);
  transform: translateX(-50%);
}
.main-nav a:hover { color: var(--accent); }
.main-nav a:hover::after { width: 80%; }
.main-nav a.active { color: var(--accent); }
.main-nav a.active::after { width: 80%; }

/* Mobile Menu */
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.menu-toggle span {
  display: block; width: 24px; height: 2px; background: var(--white);
  margin: 5px 0; transition: var(--transition);
}

/* Search Bar */
.search-bar {
  background: var(--dark-alt); border-bottom: 1px solid rgba(255,255,255,0.05);
  padding: 10px 0;
}
.search-bar .container { display: flex; justify-content: center; }
.search-form {
  display: flex; max-width: 600px; width: 100%;
  background: rgba(255,255,255,0.08); border-radius: 30px; overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
}
.search-form input {
  flex: 1; background: transparent; border: none; padding: 10px 20px;
  color: var(--white); font-size: 0.95rem; outline: none;
}
.search-form input::placeholder { color: var(--gray); }
.search-form button {
  background: var(--primary); color: var(--white); border: none;
  padding: 10px 24px; cursor: pointer; font-size: 0.95rem;
  transition: var(--transition);
}
.search-form button:hover { background: var(--primary-dark); }

/* ========== Banner / Hero ========== */
.hero-banner {
  position: relative; min-height: 85vh; display: flex; align-items: center;
  justify-content: center; overflow: hidden; margin-top: 70px;
}
.hero-banner .hero-bg {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: 0; filter: brightness(0.4);
}
.hero-overlay {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(135deg, rgba(15,15,35,0.8) 0%, rgba(196,30,58,0.3) 100%);
  z-index: 1;
}
.hero-content {
  position: relative; z-index: 2; text-align: center; padding: 40px 20px;
  max-width: 900px;
}
.hero-content h1 {
  font-size: 3.5rem; font-weight: 900; margin-bottom: 20px;
  background: linear-gradient(135deg, var(--white) 0%, var(--accent) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-content .hero-subtitle {
  font-size: 1.3rem; color: rgba(255,255,255,0.85); margin-bottom: 30px;
  line-height: 1.8;
}
.hero-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 30px; }
.hero-tags span {
  background: rgba(196,30,58,0.3); border: 1px solid rgba(196,30,58,0.5);
  padding: 6px 16px; border-radius: 20px; font-size: 0.85rem; color: var(--light);
}
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 30px; font-size: 1rem;
  font-weight: 600; cursor: pointer; transition: var(--transition); border: none;
}
.btn-primary { background: var(--primary); color: var(--white); }
.btn-primary:hover { background: var(--accent); color: var(--white); transform: translateY(-2px); box-shadow: 0 8px 25px rgba(196,30,58,0.4); }
.btn-outline {
  background: transparent; color: var(--white);
  border: 2px solid rgba(255,255,255,0.4);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ========== Section Common ========== */
.section { padding: 80px 0; }
.section-dark { background: var(--dark); }
.section-alt { background: var(--dark-alt); }
.section-gradient { background: linear-gradient(180deg, var(--dark) 0%, var(--dark-alt) 100%); }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 {
  font-size: 2.2rem; margin-bottom: 15px; color: var(--white);
}
.section-header h2 span { color: var(--primary); }
.section-header p { color: var(--gray); font-size: 1.05rem; max-width: 700px; margin: 0 auto; }
.section-divider {
  width: 60px; height: 3px; background: var(--primary);
  margin: 15px auto; border-radius: 2px;
}

/* ========== Video Cards ========== */
.video-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--secondary); border-radius: var(--radius);
  overflow: hidden; transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.05);
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(196,30,58,0.3); }
.video-thumb {
  position: relative; padding-top: 56.25%; overflow: hidden; cursor: pointer;
}
.video-thumb img {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; transition: var(--transition);
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.video-play-btn {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 60px; height: 60px; background: rgba(196,30,58,0.9);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: var(--transition); z-index: 2;
}
.video-play-btn::after {
  content: ''; width: 0; height: 0;
  border-left: 18px solid var(--white); border-top: 11px solid transparent;
  border-bottom: 11px solid transparent; margin-left: 4px;
}
.video-card:hover .video-play-btn { opacity: 1; }
.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.8); color: var(--white); padding: 2px 8px;
  border-radius: 4px; font-size: 0.8rem; z-index: 2;
}
.video-info { padding: 16px; }
.video-info h3 { font-size: 1rem; margin-bottom: 8px; color: var(--white); line-height: 1.4; }
.video-info h3 a { color: var(--white); }
.video-info h3 a:hover { color: var(--accent); }
.video-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--gray); flex-wrap: wrap; }
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-tags { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.video-tags span {
  background: rgba(196,30,58,0.15); color: var(--accent);
  padding: 3px 10px; border-radius: 12px; font-size: 0.75rem;
}

/* ========== Feature Cards ========== */
.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--secondary); border-radius: var(--radius);
  padding: 30px; text-align: center; transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.05);
}
.feature-card:hover { transform: translateY(-4px); border-color: rgba(196,30,58,0.3); }
.feature-icon {
  width: 70px; height: 70px; margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
}
.feature-card h3 { font-size: 1.2rem; margin-bottom: 12px; color: var(--white); }
.feature-card p { color: var(--gray); font-size: 0.95rem; }

/* ========== Expert Cards ========== */
.expert-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--secondary); border-radius: var(--radius);
  overflow: hidden; text-align: center; transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.05);
}
.expert-card:hover { transform: translateY(-4px); border-color: rgba(196,30,58,0.3); }
.expert-avatar {
  width: 120px; height: 120px; border-radius: 50%; margin: 24px auto 16px;
  overflow: hidden; border: 3px solid var(--primary);
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-card h3 { font-size: 1.1rem; color: var(--white); margin-bottom: 6px; }
.expert-card .expert-title { color: var(--accent); font-size: 0.9rem; margin-bottom: 12px; }
.expert-card p { color: var(--gray); font-size: 0.85rem; padding: 0 20px; margin-bottom: 16px; }
.expert-actions { display: flex; gap: 8px; justify-content: center; padding: 0 16px 20px; }
.expert-actions .btn { padding: 8px 16px; font-size: 0.85rem; }

/* ========== FAQ Section ========== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--secondary); border-radius: var(--radius-sm);
  margin-bottom: 12px; overflow: hidden;
  border: 1px solid rgba(255,255,255,0.05);
}
.faq-question {
  padding: 18px 24px; cursor: pointer; display: flex;
  justify-content: space-between; align-items: center;
  font-weight: 600; color: var(--white); transition: var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question .faq-toggle {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--primary); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; transition: var(--transition); flex-shrink: 0;
}
.faq-item.active .faq-toggle { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.3s ease;
  padding: 0 24px;
}
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 18px; }
.faq-answer p { color: var(--gray); font-size: 0.95rem; line-height: 1.7; }

/* ========== Reviews ========== */
.review-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.review-card {
  background: var(--secondary); border-radius: var(--radius);
  padding: 24px; border: 1px solid rgba(255,255,255,0.05);
}
.review-stars { color: var(--gold); margin-bottom: 12px; font-size: 1.1rem; letter-spacing: 2px; }
.review-card p { color: var(--gray); font-size: 0.95rem; line-height: 1.7; margin-bottom: 16px; font-style: italic; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-author-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--primary); display: flex; align-items: center;
  justify-content: center; color: var(--white); font-weight: 700;
}
.review-author-info .name { font-weight: 600; color: var(--white); font-size: 0.9rem; }
.review-author-info .date { color: var(--gray); font-size: 0.8rem; }

/* ========== Brand Wall ========== */
.brand-wall {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 30px;
  align-items: center;
}
.brand-wall-item {
  background: rgba(255,255,255,0.05); padding: 20px 30px;
  border-radius: var(--radius-sm); transition: var(--transition);
  font-size: 1.2rem; font-weight: 700; color: var(--gray);
  border: 1px solid rgba(255,255,255,0.08);
}
.brand-wall-item:hover { background: rgba(196,30,58,0.1); border-color: rgba(196,30,58,0.3); color: var(--white); }

/* ========== Contact Section ========== */
.contact-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.contact-card {
  background: var(--secondary); border-radius: var(--radius);
  padding: 30px; text-align: center;
  border: 1px solid rgba(255,255,255,0.05);
}
.contact-card h3 { color: var(--white); margin-bottom: 16px; font-size: 1.1rem; }
.contact-card p { color: var(--gray); font-size: 0.9rem; margin-bottom: 8px; }
.contact-card .qr-img { width: 150px; height: 150px; margin: 16px auto; }

/* ========== Share Buttons ========== */
.share-bar { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; padding: 20px 0; }
.share-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px; border-radius: 20px; font-size: 0.85rem;
  color: var(--white); transition: var(--transition); cursor: pointer; border: none;
}
.share-btn:hover { transform: translateY(-2px); opacity: 0.9; }
.share-wechat { background: #07c160; }
.share-weibo { background: #e6162d; }
.share-douyin { background: #161823; border: 1px solid #333; }
.share-bilibili { background: #00a1d6; }

/* ========== Breadcrumb ========== */
.breadcrumb {
  padding: 15px 0; font-size: 0.85rem; color: var(--gray);
  margin-top: 70px;
}
.breadcrumb a { color: var(--gray); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { margin: 0 8px; }

/* ========== Footer ========== */
.site-footer {
  background: var(--secondary); border-top: 1px solid rgba(255,255,255,0.05);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 40px; margin-bottom: 40px;
}
.footer-col h4 { color: var(--white); font-size: 1.1rem; margin-bottom: 20px; position: relative; }
.footer-col h4::after {
  content: ''; position: absolute; bottom: -8px; left: 0;
  width: 30px; height: 2px; background: var(--primary);
}
.footer-col p { color: var(--gray); font-size: 0.9rem; margin-bottom: 8px; }
.footer-col a { color: var(--gray); display: block; padding: 4px 0; font-size: 0.9rem; }
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-col .qr-small { width: 100px; height: 100px; margin-top: 10px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 20px 0; text-align: center;
  color: var(--gray); font-size: 0.85rem;
}
.footer-bottom a { color: var(--accent); }

/* ========== Page Content ========== */
.page-hero {
  position: relative; min-height: 40vh; display: flex;
  align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-alt) 100%);
  margin-top: 70px; text-align: center;
}
.page-hero h1 { font-size: 2.5rem; margin-bottom: 15px; }
.page-hero p { color: var(--gray); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.content-section { padding: 60px 0; }
.content-section h2 { font-size: 1.8rem; margin-bottom: 20px; color: var(--white); }
.content-section h3 { font-size: 1.3rem; margin-bottom: 15px; color: var(--accent); }
.content-section p { color: var(--gray); margin-bottom: 16px; line-height: 1.8; }
.content-section ul { margin-bottom: 16px; }
.content-section ul li { color: var(--gray); padding: 4px 0; padding-left: 20px; position: relative; }
.content-section ul li::before { content: '▸'; position: absolute; left: 0; color: var(--primary); }

/* ========== Sidebar Modules ========== */
.sidebar-module {
  background: var(--secondary); border-radius: var(--radius);
  padding: 24px; margin-bottom: 24px;
  border: 1px solid rgba(255,255,255,0.05);
}
.sidebar-module h3 { font-size: 1.1rem; color: var(--white); margin-bottom: 16px; padding-bottom: 10px; border-bottom: 1px solid rgba(255,255,255,0.08); }

/* ========== Stats Counter ========== */
.stats-bar {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px; padding: 40px 0;
}
.stat-item { text-align: center; }
.stat-number { font-size: 2.5rem; font-weight: 900; color: var(--primary); }
.stat-label { color: var(--gray); font-size: 0.95rem; margin-top: 6px; }

/* ========== How-To Guide ========== */
.howto-steps {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 24px; counter-reset: step;
}
.howto-step {
  background: var(--secondary); border-radius: var(--radius);
  padding: 30px; position: relative;
  border: 1px solid rgba(255,255,255,0.05);
  counter-increment: step;
}
.howto-step::before {
  content: counter(step);
  position: absolute; top: -12px; left: 24px;
  width: 36px; height: 36px; background: var(--primary);
  border-radius: 50%; display: flex; align-items: center;
  justify-content: center; font-weight: 700; font-size: 1rem;
  color: var(--white);
}
.howto-step h4 { color: var(--white); margin-bottom: 10px; margin-top: 8px; }
.howto-step p { color: var(--gray); font-size: 0.9rem; }

/* ========== MCP Frontend Placeholder ========== */
.mcp-widget {
  background: var(--secondary); border-radius: var(--radius);
  padding: 30px; text-align: center; margin: 20px 0;
  border: 1px solid rgba(255,255,255,0.08);
}
.mcp-widget h4 { color: var(--white); margin-bottom: 10px; }
.mcp-widget p { color: var(--gray); font-size: 0.9rem; }
.mcp-widget .mcp-status {
  display: inline-block; padding: 4px 12px; border-radius: 12px;
  background: rgba(7,193,96,0.2); color: #07c160; font-size: 0.8rem;
  margin-top: 10px;
}

/* ========== Responsive ========== */
@media (max-width: 992px) {
  .main-nav { display: none; }
  .main-nav.active {
    display: flex; flex-direction: column; position: absolute;
    top: 100%; left: 0; right: 0; background: var(--dark);
    padding: 20px; border-bottom: 1px solid rgba(255,255,255,0.05);
  }
  .menu-toggle { display: block; }
  .hero-content h1 { font-size: 2.2rem; }
  .hero-content .hero-subtitle { font-size: 1rem; }
  .section-header h2 { font-size: 1.8rem; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
}

@media (max-width: 768px) {
  .hero-banner { min-height: 70vh; }
  .hero-content h1 { font-size: 1.8rem; }
  .section { padding: 50px 0; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .btn { padding: 12px 24px; font-size: 0.9rem; }
  .page-hero h1 { font-size: 1.8rem; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 1.5rem; }
  .video-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: center; }
}

/* ========== Animations ========== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.6s ease forwards; }

/* Lazy load placeholder */
.lazy-placeholder {
  background: var(--secondary); display: flex; align-items: center;
  justify-content: center; color: var(--gray); font-size: 0.9rem;
}

/* ========== Inner Page Two Column Layout ========== */
.two-col-layout {
  display: grid; grid-template-columns: 1fr 320px; gap: 30px;
}
@media (max-width: 992px) {
  .two-col-layout { grid-template-columns: 1fr; }
}

/* ========== Image Gallery ========== */
.gallery-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px;
}
.gallery-item {
  border-radius: var(--radius-sm); overflow: hidden;
  position: relative; cursor: pointer;
}
.gallery-item img { transition: var(--transition); width: 100%; }
.gallery-item:hover img { transform: scale(1.05); }
.gallery-item .gallery-overlay {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  padding: 16px; transform: translateY(100%); transition: var(--transition);
}
.gallery-item:hover .gallery-overlay { transform: translateY(0); }
.gallery-overlay p { color: var(--white); font-size: 0.9rem; }

/* ========== Latest Videos Badge ========== */
.latest-badge {
  display: inline-block; background: var(--primary); color: var(--white);
  padding: 2px 8px; border-radius: 4px; font-size: 0.7rem; font-weight: 600;
  margin-left: 6px; vertical-align: middle; animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* ========== Community JSON Display ========== */
pre code {
  font-family: 'Courier New', Courier, monospace;
  white-space: pre-wrap; word-break: break-all;
}

/* ========== EEAT Trust Bar ========== */
.trust-bar {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 30px; align-items: center; text-align: center;
}
.trust-item strong {
  display: block; font-size: 1.2rem; color: var(--white);
}
.trust-item { color: var(--gray); font-size: 0.85rem; }

/* ========== Footer Legal Links ========== */
.footer-bottom a[href*="privacy"],
.footer-bottom a[href*="disclaimer"],
.footer-bottom a[href*="beian"] {
  color: var(--gray); margin: 0 4px;
}
.footer-bottom a[href*="privacy"]:hover,
.footer-bottom a[href*="disclaimer"]:hover {
  color: var(--accent);
}

/* ========== Print Styles for SEO ========== */
@media print {
  .site-header, .search-bar, .menu-toggle, .share-bar, .mcp-widget { display: none; }
  body { color: #000; background: #fff; }
  .section { padding: 20px 0; }
  a { color: #000; text-decoration: underline; }
}