/* =============================================
   蘑菇视频 - 植物视频社区 主样式文件
   nedoLaq.cn | 植物视频 | 植物教程视频
   ============================================= */

:root {
  --primary: #2d7a4f;
  --primary-dark: #1a5c38;
  --primary-light: #4caf7d;
  --accent: #f0a500;
  --accent-light: #ffd166;
  --bg-dark: #0d1f14;
  --bg-mid: #142b1c;
  --bg-light: #1e3d28;
  --text-main: #e8f5e9;
  --text-muted: #a5c8b0;
  --text-dark: #1a1a1a;
  --card-bg: rgba(20, 43, 28, 0.92);
  --border: rgba(77, 175, 125, 0.25);
  --shadow: 0 4px 24px rgba(0,0,0,0.35);
  --radius: 12px;
  --radius-sm: 6px;
  --transition: all 0.3s ease;
}

*, *::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;
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ---- 干扰标签隐藏 ---- */
.dy-noise { display: none !important; }

/* ---- 通用布局 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 70px 0; }
.section-alt { background: var(--bg-mid); }
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  text-align: center;
  margin-bottom: 12px;
  position: relative;
}
.section-title span { color: var(--primary-light); }
.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 48px;
}
.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin: 12px auto 0;
  border-radius: 2px;
}

/* ---- 导航栏 ---- */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(13, 31, 20, 0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 20px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-wrap img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}
.logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-light);
  letter-spacing: 1px;
}
.logo-text em { color: var(--accent); font-style: normal; }

/* 主导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--primary-light);
  background: rgba(77,175,125,0.12);
}

/* 搜索框 */
.search-wrap {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 4px 14px;
  gap: 8px;
  min-width: 200px;
}
.search-wrap input {
  background: none;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.88rem;
  width: 100%;
}
.search-wrap input::placeholder { color: var(--text-muted); }
.search-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1rem;
  transition: var(--transition);
  padding: 0;
}
.search-btn:hover { color: var(--primary-light); }

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

/* ---- Banner ---- */
#banner {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.banner-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
  transform: scale(1.03);
  transition: transform 8s ease;
}
#banner:hover .banner-bg { transform: scale(1.0); }
.banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,31,20,0.7) 0%, rgba(45,122,79,0.2) 100%);
}
.banner-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  padding: 100px 20px 60px;
}
.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(77,175,125,0.2);
  border: 1px solid var(--primary-light);
  color: var(--primary-light);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  margin-bottom: 20px;
}
.banner-h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  color: #fff;
}
.banner-h1 .hl { color: var(--primary-light); }
.banner-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 36px;
  max-width: 560px;
}
.banner-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  padding: 13px 28px;
  border-radius: 28px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(45,122,79,0.4); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: #fff;
  padding: 13px 28px;
  border-radius: 28px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid rgba(255,255,255,0.5);
  transition: var(--transition);
}
.btn-outline:hover { border-color: var(--primary-light); color: var(--primary-light); }
.banner-stats {
  position: absolute;
  bottom: 40px;
  left: 0; right: 0;
  display: flex;
  justify-content: center;
  gap: 48px;
  z-index: 2;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary-light);
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); }

/* ---- 视频卡片 ---- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: var(--primary-light);
}
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.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-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 18px solid var(--primary-dark);
  margin-left: 4px;
}
.video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 6px;
  border-radius: 4px;
}
.video-info { padding: 14px 16px 16px; }
.video-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }

/* ---- 专家卡片 ---- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}
.expert-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.expert-avatar {
  width: 100%;
  height: 200px;
  object-fit: cover;
  object-position: top;
}
.expert-body { padding: 20px; }
.expert-name { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.expert-role { color: var(--primary-light); font-size: 0.85rem; margin-bottom: 10px; }
.expert-desc { font-size: 0.83rem; color: var(--text-muted); margin-bottom: 14px; line-height: 1.6; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 14px; }
.tag {
  background: rgba(77,175,125,0.15);
  color: var(--primary-light);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 12px;
  border: 1px solid rgba(77,175,125,0.3);
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.btn-sm {
  font-size: 0.8rem;
  padding: 7px 16px;
  border-radius: 20px;
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid var(--primary);
  color: var(--primary-light);
  background: transparent;
  cursor: pointer;
}
.btn-sm:hover { background: var(--primary); color: #fff; }
.btn-sm.filled { background: var(--primary); color: #fff; }
.btn-sm.filled:hover { background: var(--primary-dark); }

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-q {
  width: 100%;
  background: var(--card-bg);
  border: none;
  color: var(--text-main);
  text-align: left;
  padding: 16px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}
.faq-q:hover { background: rgba(77,175,125,0.1); }
.faq-q .arrow {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  transition: transform 0.3s;
}
.faq-item.open .faq-q .arrow { transform: rotate(180deg); }
.faq-a {
  display: none;
  padding: 0 20px 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
  background: var(--card-bg);
  line-height: 1.8;
}
.faq-item.open .faq-a { display: block; }

/* ---- 评论 ---- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: var(--transition);
}
.review-card:hover { border-color: var(--primary-light); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-weight: 600; font-size: 0.9rem; }
.review-date { font-size: 0.75rem; color: var(--text-muted); }
.review-stars { color: var(--accent); font-size: 0.85rem; margin-bottom: 8px; }
.review-text { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; }

/* ---- 合作品牌 ---- */
.brands-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 16px;
}
.brand-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 16px;
  text-align: center;
  transition: var(--transition);
}
.brand-item:hover { border-color: var(--primary-light); transform: scale(1.03); }
.brand-name { font-size: 0.85rem; font-weight: 600; color: var(--text-muted); }

/* ---- AI模块 ---- */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.ai-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}
.ai-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.ai-icon { font-size: 2.2rem; margin-bottom: 14px; }
.ai-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }
.ai-desc { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; }

/* ---- 联系 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info h3 { font-size: 1.3rem; margin-bottom: 20px; color: var(--primary-light); }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}
.contact-icon {
  width: 40px;
  height: 40px;
  background: rgba(77,175,125,0.15);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-size: 0.9rem; font-weight: 500; }
.qr-row { display: flex; gap: 20px; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-item img { width: 120px; height: 120px; border-radius: 8px; border: 2px solid var(--border); }
.qr-label { font-size: 0.78rem; color: var(--text-muted); margin-top: 6px; }

/* ---- 社交分享 ---- */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 24px 0;
}
.share-label { font-size: 0.9rem; color: var(--text-muted); }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}
.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #010101; color: #fff; border: 1px solid #333; }
.share-bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { opacity: 0.85; transform: translateY(-1px); }

/* ---- 页脚 ---- */
#site-footer {
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  padding: 50px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-text { font-size: 1.3rem; margin-bottom: 12px; display: block; }
.footer-desc { font-size: 0.83rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 16px; }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 14px; color: var(--text-main); }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 8px; }
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.83rem;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--primary-light); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); text-decoration: none; }
.footer-bottom a:hover { color: var(--primary-light); }

/* ---- 面包屑 ---- */
.breadcrumb {
  padding: 12px 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb span { margin: 0 6px; }

/* ---- 加入社区指南 ---- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
}
.step-card {
  text-align: center;
  padding: 28px 20px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}
.step-card:hover { border-color: var(--primary-light); }
.step-num {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 14px;
}
.step-title { font-size: 0.95rem; font-weight: 600; margin-bottom: 8px; }
.step-desc { font-size: 0.82rem; color: var(--text-muted); }

/* ---- 用户口碑 ---- */
.testimonial-wrap {
  background: linear-gradient(135deg, var(--bg-mid), var(--bg-light));
  border-radius: var(--radius);
  padding: 40px;
}

/* ---- 内页Hero ---- */
.page-hero {
  padding: 120px 0 60px;
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-mid) 100%);
  text-align: center;
}
.page-hero h1 { font-size: 2.4rem; font-weight: 800; margin-bottom: 12px; }
.page-hero p { color: var(--text-muted); font-size: 1rem; max-width: 600px; margin: 0 auto; }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .main-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: rgba(13,31,20,0.98); flex-direction: column; padding: 16px; gap: 4px; border-bottom: 1px solid var(--border); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 16px; }
  .menu-toggle { display: flex; }
  .search-wrap { min-width: 140px; }
  .banner-stats { gap: 24px; bottom: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .section { padding: 48px 0; }
  .banner-content { padding: 90px 20px 80px; }
}
@media (max-width: 480px) {
  .banner-h1 { font-size: 1.9rem; }
  .banner-btns { flex-direction: column; }
  .btn-primary, .btn-outline { justify-content: center; }
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
}

/* ---- 懒加载占位 ---- */
img[data-src] { opacity: 0; transition: opacity 0.4s; }
img.loaded { opacity: 1; }

/* ---- 滚动动画 ---- */
.fade-in { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ---- 视频播放模态 ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal-box {
  background: var(--bg-mid);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 800px;
  width: 90%;
  position: relative;
}
.modal-close {
  position: absolute;
  top: 12px; right: 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  transition: var(--transition);
}
.modal-close:hover { color: #fff; }
.modal-video {
  width: 100%;
  aspect-ratio: 16/9;
  background: #000;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ---- 精选内页模块 ---- */
.inner-section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  padding-left: 14px;
  border-left: 4px solid var(--primary-light);
  color: var(--text-main);
}

/* ---- 进度条 ---- */
.skill-bar { margin-bottom: 14px; }
.skill-label { display: flex; justify-content: space-between; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 6px; }
.skill-track { height: 6px; background: rgba(255,255,255,0.1); border-radius: 3px; overflow: hidden; }
.skill-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--primary-light)); border-radius: 3px; transition: width 1s ease; }

/* ---- 联系表单 ---- */
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; }
.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.9rem;
  padding: 10px 14px;
  outline: none;
  transition: var(--transition);
  font-family: inherit;
  resize: vertical;
}
.form-group input:focus,
.form-group select,
.form-group textarea:focus { border-color: var(--primary-light); background: rgba(77,175,125,0.08); }
.form-group select option { background: var(--bg-mid); color: var(--text-main); }

/* ---- 品牌合作网格 ---- */
.brands-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 16px;
}
.brand-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 12px;
  text-align: center;
  transition: var(--transition);
}
.brand-item:hover { border-color: var(--primary-light); transform: translateY(-2px); }
.brand-name { font-size: 0.82rem; font-weight: 700; color: var(--text-main); }

/* ---- 步骤网格 ---- */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}
.step-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  transition: var(--transition);
}
.step-card:hover { border-color: var(--primary-light); }
.step-num {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  font-size: 1.1rem;
  font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 12px;
}
.step-title { font-size: 0.92rem; font-weight: 700; margin-bottom: 8px; }
.step-desc { font-size: 0.78rem; color: var(--text-muted); line-height: 1.6; }

/* ---- 响应式补充 ---- */
@media (max-width: 768px) {
  .contact-form { gap: 12px; }
  .brands-grid { grid-template-columns: repeat(3, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .brands-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: 1fr; }
}

/* ===== 面包屑导航栏 ===== */
.breadcrumb-bar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
  font-size: 0.82rem;
  margin-top: 64px;
}
.breadcrumb-bar nav { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.breadcrumb-bar a { color: var(--primary-light); text-decoration: none; }
.breadcrumb-bar a:hover { text-decoration: underline; }
.bc-sep { color: var(--text-muted); }

/* ===== 视频分类标签 ===== */
.video-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
.video-tab {
  padding: 7px 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text-muted);
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.2s;
}
.video-tab:hover, .video-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ===== 社区网格 ===== */
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}
@media (max-width: 768px) { .community-grid { grid-template-columns: 1fr; } }

/* ===== 分页 ===== */
.pagination { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.page-btn {
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
}
.page-btn:hover, .page-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ===== 页面英雄区 ===== */
.page-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--card-bg) 100%);
  padding: 100px 0 40px;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.page-h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; color: var(--text-main); }
.page-h1 span { color: var(--primary-light); }
.page-subtitle { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; }

/* ===== SEO H5 ===== */
.seo-h5 a { color: var(--primary-light); text-decoration: none; margin: 0 4px; }
.seo-h5 a:hover { text-decoration: underline; }

/* ===== 视频描述 ===== */
.video-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 6px 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 视频海报 ===== */
.video-preview {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 1;
}
.video-poster {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.video-card:hover .video-poster { transform: scale(1.04); }

/* ===== AI网格 ===== */
.ai-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 24px; margin-top: 32px; }
.ai-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: var(--transition); }
.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary-light); }
.ai-icon { font-size: 2.2rem; margin-bottom: 14px; }
.ai-title { font-size: 1rem; font-weight: 700; margin-bottom: 10px; color: var(--primary-light); }
.ai-desc { font-size: 0.83rem; color: var(--text-muted); line-height: 1.7; }

/* ===== 内链区域 ===== */
.inner-link-section {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-top: 40px;
}
.inner-link-section h4 { font-size: 0.9rem; margin-bottom: 12px; color: var(--text-main); }
.inner-link-section a {
  display: inline-block;
  margin: 4px 8px 4px 0;
  font-size: 0.82rem;
  color: var(--primary-light);
  text-decoration: none;
}
.inner-link-section a:hover { text-decoration: underline; }

/* ===== 响应式补充 ===== */
@media (max-width: 600px) {
  .page-h1 { font-size: 1.5rem; }
  .video-tabs { gap: 6px; }
  .video-tab { padding: 5px 12px; font-size: 0.78rem; }
  .ai-grid { grid-template-columns: 1fr; }
}