/* ========================================
   暗网 - 动物写真社区 主样式文件
   yfojhd.cn | 原创设计
   ======================================== */

/* CSS变量 - 原创配色方案 */
:root {
  --primary: #1a5c3a;
  --primary-dark: #0f3d27;
  --primary-light: #2d8a57;
  --accent: #f0b429;
  --accent-dark: #d4960f;
  --bg-dark: #0d1f14;
  --bg-medium: #132b1c;
  --bg-light: #f8fdf9;
  --text-main: #1a2e20;
  --text-muted: #5a7a62;
  --text-white: #ffffff;
  --border-color: #d4e8d8;
  --card-shadow: 0 4px 20px rgba(26,92,58,0.12);
  --card-hover-shadow: 0 8px 32px rgba(26,92,58,0.22);
  --radius: 12px;
  --radius-sm: 6px;
  --transition: all 0.3s ease;
}

/* 基础重置 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  color: var(--text-main);
  background: var(--bg-light);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul, ol { list-style: none; }

/* ========== 顶部公告栏 ========== */
.top-bar {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.85);
  font-size: 0.82rem;
  padding: 6px 0;
  text-align: center;
}
.top-bar a { color: var(--accent); }

/* ========== 头部导航 ========== */
.site-header {
  background: #fff;
  box-shadow: 0 2px 16px rgba(26,92,58,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 70px;
  gap: 32px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
}
.site-logo .logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}
.site-logo .logo-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: block;
  line-height: 1;
}

/* 主导航 */
.main-nav { flex: 1; }
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav ul li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-main);
  border-radius: var(--radius-sm);
  white-space: nowrap;
}
.main-nav ul li a:hover,
.main-nav ul li a.active {
  color: var(--primary);
  background: rgba(26,92,58,0.07);
}
.main-nav ul li a.active { font-weight: 700; }

/* 头部搜索框 */
.header-search {
  display: flex;
  align-items: center;
  background: var(--bg-light);
  border: 1.5px solid var(--border-color);
  border-radius: 24px;
  padding: 6px 16px;
  gap: 8px;
  min-width: 220px;
}
.header-search input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.88rem;
  color: var(--text-main);
  width: 100%;
}
.header-search button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--primary);
  font-size: 1rem;
  padding: 0;
  display: flex;
  align-items: center;
}
.header-search button:hover { color: var(--accent); }

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========== 搜索栏（导航下方） ========== */
.search-bar-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 16px 0;
}
.search-bar-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  gap: 0;
}
.search-bar-inner input {
  flex: 1;
  padding: 14px 20px;
  border: none;
  border-radius: 32px 0 0 32px;
  font-size: 1rem;
  outline: none;
  background: #fff;
}
.search-bar-inner button {
  padding: 14px 28px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 0 32px 32px 0;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}
.search-bar-inner button:hover { background: var(--accent-dark); }

/* ========== Hero Banner ========== */
.hero-banner {
  position: relative;
  height: 580px;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner_bg.jpg');
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
  transition: transform 8s ease;
}
.hero-banner:hover .hero-bg { transform: scale(1); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,31,20,0.82) 0%, rgba(26,92,58,0.45) 60%, rgba(0,0,0,0.2) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  color: #fff;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(240,180,41,0.2);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 18px;
}
.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
}
.hero-content h1 span { color: var(--accent); }
.hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.88);
  max-width: 560px;
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 32px;
}
.hero-stat .num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}
.hero-stat .label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 32px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(240,180,41,0.4);
}
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border: 2px solid rgba(255,255,255,0.6);
  color: #fff;
  border-radius: 32px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
}
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }

/* ========== 通用容器 ========== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 72px 0; }
.section-alt { background: #f0f8f2; }
.section-dark { background: var(--bg-dark); color: #fff; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  background: rgba(26,92,58,0.1);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-dark .section-tag {
  background: rgba(240,180,41,0.15);
  color: var(--accent);
}
.section-header h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-dark .section-header h2 { color: #fff; }
.section-header p {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}
.section-dark .section-header p { color: rgba(255,255,255,0.65); }

/* ========== 视频卡片 ========== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-hover-shadow);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-dark);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }
.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .play-btn { opacity: 1; }
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--primary);
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info { padding: 16px; }
.video-info h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-stats {
  display: flex;
  gap: 12px;
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ========== 功能模块卡片 ========== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.feature-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  border-bottom: 3px solid transparent;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-hover-shadow);
  border-bottom-color: var(--primary);
}
.feature-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ========== 专家展示 ========== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}
.expert-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  text-align: center;
}
.expert-card:hover { transform: translateY(-6px); box-shadow: var(--card-hover-shadow); }
.expert-photo {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  position: relative;
  overflow: hidden;
}
.expert-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.expert-badge {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 12px;
  font-weight: 700;
  white-space: nowrap;
}
.expert-info { padding: 20px; }
.expert-info h3 { font-size: 1.05rem; font-weight: 800; margin-bottom: 4px; }
.expert-info .role { font-size: 0.82rem; color: var(--primary); font-weight: 600; margin-bottom: 10px; }
.expert-info p { font-size: 0.83rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.expert-awards { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 14px; }
.award-tag {
  background: rgba(26,92,58,0.08);
  color: var(--primary);
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 10px;
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  padding: 7px 14px;
  font-size: 0.8rem;
  border-radius: 20px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-green { background: var(--primary); color: #fff; }
.btn-green:hover { background: var(--primary-dark); }
.btn-ghost { border: 1.5px solid var(--border-color); color: var(--text-muted); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

/* ========== 社区模块 ========== */
.community-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.tab-btn {
  padding: 9px 20px;
  border-radius: 24px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--border-color);
  background: #fff;
  color: var(--text-muted);
  transition: var(--transition);
}
.tab-btn.active, .tab-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ========== AI赋能模块 ========== */
.ai-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.ai-card {
  background: linear-gradient(135deg, var(--bg-medium), var(--primary-dark));
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 28px;
  color: #fff;
  transition: var(--transition);
}
.ai-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.ai-card .ai-icon { font-size: 2.2rem; margin-bottom: 14px; }
.ai-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; color: var(--accent); }
.ai-card p { font-size: 0.88rem; color: rgba(255,255,255,0.75); line-height: 1.7; }
.ai-card ul { margin-top: 12px; }
.ai-card ul li {
  font-size: 0.83rem;
  color: rgba(255,255,255,0.65);
  padding: 4px 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  display: flex;
  align-items: center;
  gap: 8px;
}
.ai-card ul li::before { content: '▸'; color: var(--accent); font-size: 0.7rem; }

/* ========== 合作品牌 ========== */
.partners-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: #fff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
  text-align: center;
  min-width: 120px;
}
.partner-item:hover { border-color: var(--primary); color: var(--primary); transform: scale(1.04); }

/* ========== 用户评论 ========== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.review-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--card-shadow);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--card-hover-shadow); }
.review-stars { color: var(--accent); font-size: 1rem; margin-bottom: 10px; }
.review-text { font-size: 0.9rem; color: var(--text-main); line-height: 1.7; margin-bottom: 14px; font-style: italic; }
.reviewer { display: flex; align-items: center; gap: 10px; }
.reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}
.reviewer-name { font-weight: 700; font-size: 0.9rem; }
.reviewer-info { font-size: 0.78rem; color: var(--text-muted); }

/* ========== FAQ ========== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  box-shadow: 0 2px 8px rgba(26,92,58,0.07);
  overflow: hidden;
}
.faq-question {
  padding: 18px 24px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-main);
  transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-question::after { content: '−'; }
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 18px; }

/* ========== 联系我们 ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info-block h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--primary);
}
.contact-item {
  display: flex;
  gap: 14px;
  margin-bottom: 16px;
  align-items: flex-start;
}
.contact-icon {
  width: 40px;
  height: 40px;
  background: rgba(26,92,58,0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-item .label { font-size: 0.8rem; color: var(--text-muted); }
.contact-item .value { font-size: 0.95rem; font-weight: 600; color: var(--text-main); }
.qrcode-row {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}
.qrcode-item { text-align: center; }
.qrcode-item img {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-color);
  object-fit: cover;
}
.qrcode-item p { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }

/* ========== 社交分享 ========== */
.share-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 24px 0;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 24px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}
.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #000; color: #fff; }
.share-bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { opacity: 0.85; transform: translateY(-2px); }

/* ========== 页脚 ========== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.75);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-brand .logo-wrap img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  filter: brightness(1.1);
}
.footer-brand .logo-wrap span {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
}
.footer-brand p { font-size: 0.87rem; line-height: 1.8; margin-bottom: 16px; }
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 0.82rem; color: rgba(255,255,255,0.45); }
.footer-bottom a { color: rgba(255,255,255,0.55); }
.footer-bottom a:hover { color: var(--accent); }
.update-time { font-size: 0.78rem; color: rgba(255,255,255,0.35); }

/* ========== 面包屑 ========== */
.breadcrumb {
  background: #f0f8f2;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-color);
}
.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.83rem;
  color: var(--text-muted);
}
.breadcrumb ol li a { color: var(--primary); }
.breadcrumb ol li + li::before { content: '/'; margin-right: 6px; }

/* ========== 内页Banner ========== */
.inner-banner {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  padding: 56px 0;
  color: #fff;
  text-align: center;
}
.inner-banner h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 900; margin-bottom: 10px; }
.inner-banner p { font-size: 1rem; color: rgba(255,255,255,0.75); }

/* ========== 分页 ========== */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}
.page-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1.5px solid var(--border-color);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.page-btn.active, .page-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ========== 加入社区 How-To ========== */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.howto-step {
  text-align: center;
  padding: 28px 20px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  position: relative;
}
.howto-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
}
.howto-step .step-icon { font-size: 2.4rem; margin-bottom: 14px; margin-top: 8px; }
.howto-step h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.howto-step p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .ai-cards { grid-template-columns: 1fr 1fr; }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .header-inner { gap: 16px; }
  .main-nav { display: none; }
  .main-nav.open { display: block; position: absolute; top: 70px; left: 0; right: 0; background: #fff; box-shadow: 0 8px 24px rgba(0,0,0,0.12); padding: 16px; z-index: 999; }
  .main-nav.open ul { flex-direction: column; }
  .hamburger { display: flex; }
  .header-search { display: none; }
  .hero-banner { height: 420px; }
  .hero-stats { gap: 16px; }
  .ai-cards { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
}
@media (max-width: 480px) {
  .hero-content h1 { font-size: 1.6rem; }
  .hero-btns { flex-direction: column; }
  .video-grid { grid-template-columns: 1fr; }
}

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-24 { margin-bottom: 24px; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-16 { gap: 16px; }
.hidden { display: none; }

/* ========== 干扰标签样式（不影响布局） ========== */
div[id^="x"], div[class^="x"],
div[id^="z"], div[class^="z"],
div[id^="q"], div[class^="q"] {
  display: none !important;
  visibility: hidden !important;
  position: absolute !important;
  width: 0 !important;
  height: 0 !important;
  overflow: hidden !important;
  pointer-events: none !important;
}

/* ========== 首页补充样式 ========== */

/* Hero banner 全屏 */
.hero-banner { height: auto; min-height: 92vh; }
.hero-content { padding: 100px 60px 80px; max-width: 1280px; }
.stat-num { font-size: 1.8rem; font-weight: 900; color: var(--accent); display: block; }
.stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.65); display: block; }
.hero-scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: rgba(255,255,255,0.45);
  font-size: 0.72rem;
  z-index: 2;
}
.scroll-arrow {
  width: 18px;
  height: 18px;
  border-right: 2px solid rgba(255,255,255,0.35);
  border-bottom: 2px solid rgba(255,255,255,0.35);
  transform: rotate(45deg);
  margin: 6px auto 0;
  animation: bounce 1.5s infinite;
}
@keyframes bounce { 0%,100%{transform:rotate(45deg) translateY(0)} 50%{transform:rotate(45deg) translateY(5px)} }

/* 搜索区域 */
.search-bar-section { background: white; padding: 24px; border-bottom: 1.5px solid var(--border-color); }
.search-bar-inner { max-width: 800px; margin: 0 auto; text-align: center; display: block; }
.search-title { font-size: 1rem; font-weight: 700; margin-bottom: 14px; color: var(--text-main); }
.search-form { display: flex; background: #f5faf6; border: 2px solid var(--border-color); border-radius: 32px; overflow: hidden; margin-bottom: 14px; }
.search-form input { flex: 1; padding: 13px 20px; border: none; background: transparent; font-size: 0.95rem; outline: none; }
.search-form button { padding: 13px 28px; background: var(--primary); color: white; font-weight: 700; font-size: 0.9rem; white-space: nowrap; }
.search-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: center; font-size: 0.82rem; color: var(--text-muted); }
.search-tags a { padding: 4px 12px; background: rgba(26,92,58,0.08); border: 1px solid var(--border-color); border-radius: 16px; color: var(--primary); font-weight: 600; }
.search-tags a:hover { background: var(--primary); color: white; }

/* 视频Hot标签 */
.video-hot { position: absolute; top: 8px; right: 8px; background: #e53e3e; color: white; padding: 3px 8px; border-radius: 4px; font-size: 0.68rem; font-weight: 800; }

/* 动物传媒 */
.media-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px; }
.media-card { background: white; border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--card-shadow); transition: var(--transition); border: 1.5px solid var(--border-color); }
.media-card:hover { transform: translateY(-4px); box-shadow: var(--card-hover-shadow); border-color: var(--primary); }
.media-icon { font-size: 2rem; margin-bottom: 14px; }
.media-card h3 { font-size: 1rem; font-weight: 800; margin-bottom: 10px; }
.media-card p { font-size: 0.87rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 14px; }
.media-link { font-size: 0.85rem; color: var(--primary); font-weight: 700; }
.media-link:hover { text-decoration: underline; }

/* 娱乐专区 */
.entertainment-grid { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 280px 220px; gap: 20px; }
.ent-card { border-radius: var(--radius); overflow: hidden; position: relative; background-size: cover; background-position: center; cursor: pointer; transition: var(--transition); }
.ent-card:hover { transform: scale(1.02); box-shadow: var(--card-hover-shadow); }
.ent-large { grid-row: span 2; }
.ent-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(10,25,15,0.85) 0%, rgba(10,25,15,0.2) 60%, transparent 100%); transition: var(--transition); }
.ent-card:hover .ent-overlay { background: linear-gradient(to top, rgba(10,25,15,0.9) 0%, rgba(10,25,15,0.4) 60%, rgba(10,25,15,0.1) 100%); }
.ent-content { position: absolute; bottom: 0; left: 0; right: 0; padding: 24px; color: white; }
.ent-tag { display: inline-block; background: rgba(240,180,41,0.25); border: 1px solid rgba(240,180,41,0.5); color: var(--accent); padding: 3px 10px; border-radius: 12px; font-size: 0.75rem; font-weight: 700; margin-bottom: 8px; }
.ent-content h3 { font-size: 1.1rem; font-weight: 800; margin-bottom: 6px; }
.ent-content p { font-size: 0.82rem; color: rgba(255,255,255,0.75); margin-bottom: 12px; line-height: 1.5; }
.ent-btn { display: inline-flex; padding: 7px 18px; background: var(--primary); color: white; border-radius: var(--radius-sm); font-size: 0.82rem; font-weight: 700; }
.ent-btn:hover { background: var(--primary-dark); }

/* AI赋能新样式 */
.ai-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.ai-card { background: white; border-radius: var(--radius); padding: 28px; box-shadow: var(--card-shadow); display: flex; gap: 20px; align-items: flex-start; border: 1.5px solid var(--border-color); transition: var(--transition); }
.ai-card:hover { border-color: var(--primary); box-shadow: var(--card-hover-shadow); transform: translateY(-3px); }
.ai-icon-wrap { flex-shrink: 0; width: 52px; height: 52px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; }
.ai-icon { font-size: 1.5rem; }
.ai-content h3 { font-size: 0.98rem; font-weight: 800; margin-bottom: 8px; }
.ai-content p { font-size: 0.86rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 12px; }
.ai-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.ai-tags span { padding: 3px 10px; background: rgba(26,92,58,0.08); border: 1px solid rgba(26,92,58,0.2); border-radius: 12px; font-size: 0.72rem; color: var(--primary); font-weight: 600; }

/* 社区模块 */
.community-sections { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 40px; }
.community-section-card { border-radius: var(--radius); overflow: hidden; box-shadow: var(--card-shadow); transition: var(--transition); }
.community-section-card:hover { transform: translateY(-4px); box-shadow: var(--card-hover-shadow); }
.cs-header { padding: 24px 20px; color: white; text-align: center; }
.cs-icon { font-size: 2.5rem; display: block; margin-bottom: 10px; }
.cs-header h3 { font-size: 1rem; font-weight: 800; margin-bottom: 6px; }
.cs-header p { font-size: 0.78rem; color: rgba(255,255,255,0.75); }
.cs-body { background: white; padding: 16px 20px; display: flex; flex-direction: column; gap: 12px; }
.cs-stat { display: flex; justify-content: space-between; font-size: 0.85rem; }
.cs-stat span:first-child { font-weight: 800; color: var(--primary); }
.cs-stat span:last-child { color: var(--text-muted); }
.cs-btn { display: block; text-align: center; padding: 9px; background: #f0f8f2; border: 1.5px solid var(--border-color); border-radius: var(--radius-sm); font-size: 0.82rem; font-weight: 700; color: var(--primary); transition: var(--transition); }
.cs-btn:hover { background: var(--primary); color: white; border-color: var(--primary); }

/* 话题网格 */
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.topic-card { background: white; border-radius: var(--radius); padding: 16px 20px; display: flex; align-items: center; gap: 14px; box-shadow: var(--card-shadow); border: 1.5px solid var(--border-color); transition: var(--transition); }
.topic-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.topic-num { font-size: 1.4rem; font-weight: 900; color: rgba(26,92,58,0.15); flex-shrink: 0; line-height: 1; }
.topic-title { font-size: 0.88rem; font-weight: 700; margin-bottom: 4px; }
.topic-meta { font-size: 0.75rem; color: var(--text-muted); }

/* 用户评价 */
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--primary-light)); display: flex; align-items: center; justify-content: center; color: white; font-weight: 800; font-size: 1.1rem; flex-shrink: 0; }
.review-name { font-size: 0.9rem; font-weight: 700; }
.review-role { font-size: 0.75rem; color: var(--text-muted); }

/* FAQ新样式 */
.faq-q { padding: 18px 22px; font-size: 0.95rem; font-weight: 700; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; user-select: none; }
.faq-q:hover { color: var(--primary); }
.faq-arrow { color: var(--primary); font-size: 0.75rem; transition: var(--transition); flex-shrink: 0; }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a { padding: 0 22px; max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; }
.faq-item.open .faq-a { padding: 0 22px 18px; max-height: 300px; }
.faq-a p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.8; }

/* 合作机构 */
.partners-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* CTA区域 */
.cta-section { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%); padding: 72px 24px; }
.cta-inner { max-width: 1280px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-text h2 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); font-weight: 900; color: white; margin-bottom: 10px; }
.cta-text p { font-size: 0.92rem; color: rgba(255,255,255,0.8); max-width: 500px; line-height: 1.7; }
.cta-btns { display: flex; gap: 14px; flex-wrap: wrap; flex-shrink: 0; }
.btn-secondary { display: inline-flex; align-items: center; gap: 6px; padding: 13px 28px; background: rgba(255,255,255,0.12); color: white; border: 2px solid rgba(255,255,255,0.4); border-radius: 32px; font-weight: 700; font-size: 0.95rem; transition: var(--transition); }
.btn-secondary:hover { background: rgba(255,255,255,0.22); border-color: rgba(255,255,255,0.7); transform: translateY(-2px); }
.btn-secondary-light { display: inline-flex; align-items: center; gap: 6px; padding: 13px 28px; background: transparent; color: white; border: 2px solid rgba(255,255,255,0.6); border-radius: 32px; font-weight: 700; font-size: 0.95rem; transition: var(--transition); }
.btn-secondary-light:hover { background: rgba(255,255,255,0.15); transform: translateY(-2px); }

/* 页脚补充 */
.footer-social { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.footer-social a { padding: 5px 12px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); border-radius: var(--radius-sm); font-size: 0.75rem; color: rgba(255,255,255,0.65); transition: var(--transition); }
.footer-social a:hover { background: var(--primary); color: white; }
.footer-qrcodes { display: flex; gap: 12px; margin-top: 14px; }
.footer-qrcodes div { text-align: center; }
.footer-qrcodes img { width: 72px; height: 72px; border-radius: 6px; border: 2px solid rgba(255,255,255,0.15); background: white; padding: 4px; }
.footer-qrcodes p { font-size: 0.7rem; color: rgba(255,255,255,0.4); margin-top: 4px; }

/* 响应式补充 */
@media (max-width: 1024px) {
  .community-sections { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: 1fr; }
  .entertainment-grid { grid-template-rows: 240px 200px; }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .hero-content { padding: 60px 24px; }
  .entertainment-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .ent-large { grid-row: span 1; }
  .community-sections { grid-template-columns: repeat(2, 1fr); }
  .topic-grid { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; text-align: center; }
  .reviews-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .community-sections { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: 1fr 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .hero-content { padding: 48px 16px; }
}