/*
  国产自拍修车改装视频社区 - 原创样式
  域名: chtzhd.cn
  主题: 深夜车库 · 烈焰橙 · 碳纤维黑
  ========================================
*/

/* ===== CSS变量 ===== */
:root {
  --brand:        #ff6a00;
  --brand-dark:   #cc5200;
  --brand-light:  #ff8c3a;
  --brand-glow:   rgba(255,106,0,0.18);
  --bg-deep:      #0d0d0f;
  --bg-card:      #141418;
  --bg-section:   #111115;
  --bg-alt:       #18181e;
  --text-main:    #f0f0f0;
  --text-sub:     #b0b0b8;
  --text-muted:   #6a6a7a;
  --border:       rgba(255,106,0,0.15);
  --border-card:  rgba(255,255,255,0.06);
  --radius-sm:    6px;
  --radius-md:    12px;
  --radius-lg:    20px;
  --shadow-card:  0 4px 24px rgba(0,0,0,0.45);
  --shadow-glow:  0 0 24px rgba(255,106,0,0.25);
  --transition:   all 0.28s cubic-bezier(0.4,0,0.2,1);
  --font-main:    'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --max-w:        1280px;
}

/* ===== 重置 & 基础 ===== */
*, *::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(--bg-deep);
  color: var(--text-main);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--brand); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--brand-light); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; outline: none; font-family: var(--font-main); }

/* ===== 容器 ===== */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 头部 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,13,15,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(13,13,15,0.99);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text-main);
}
.logo-img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
}
.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.logo-text em {
  font-style: normal;
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--brand);
  letter-spacing: -0.5px;
}
.logo-text small {
  font-size: 0.68rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}
.main-nav { flex: 1; }
.nav-list {
  display: flex;
  gap: 4px;
  align-items: center;
}
.nav-link {
  display: block;
  padding: 6px 14px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-sub);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--brand);
  background: var(--brand-glow);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.btn-join {
  padding: 8px 20px;
  background: var(--brand);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.btn-join:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  background: transparent;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-sub);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== 搜索栏 ===== */
.search-bar-wrap {
  background: var(--bg-section);
  border-bottom: 1px solid var(--border-card);
  padding: 10px 0;
}
.search-form { display: flex; flex-direction: column; gap: 8px; }
.search-inner {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
}
.search-inner:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-glow);
}
.search-icon { padding: 0 12px; font-size: 1rem; color: var(--text-muted); }
.search-input {
  flex: 1;
  padding: 10px 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.92rem;
  font-family: var(--font-main);
}
.search-input::placeholder { color: var(--text-muted); }
.search-btn {
  padding: 10px 20px;
  background: var(--brand);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 700;
  border-radius: 0 7px 7px 0;
  transition: var(--transition);
}
.search-btn:hover { background: var(--brand-dark); }
.search-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.search-tag-label { font-size: 0.78rem; color: var(--text-muted); }
.search-hot-tag {
  font-size: 0.78rem;
  color: var(--text-sub);
  background: var(--bg-alt);
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid var(--border-card);
  transition: var(--transition);
}
.search-hot-tag:hover {
  color: var(--brand);
  border-color: var(--brand);
  background: var(--brand-glow);
}

/* ===== 移动端导航 ===== */
.mobile-nav {
  position: fixed;
  top: 0; right: -300px;
  width: 280px;
  height: 100vh;
  background: var(--bg-card);
  z-index: 2000;
  transition: right 0.3s ease;
  border-left: 1px solid var(--border);
  overflow-y: auto;
}
.mobile-nav.open { right: 0; }
.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid var(--border-card);
}
.mobile-nav-title { font-size: 0.9rem; font-weight: 700; color: var(--brand); }
.mobile-close {
  background: transparent;
  color: var(--text-sub);
  font-size: 1.2rem;
  padding: 4px 8px;
}
.mobile-nav-list { padding: 12px 0; }
.mobile-nav-list li a {
  display: block;
  padding: 14px 20px;
  color: var(--text-sub);
  font-size: 0.95rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border-card);
  transition: var(--transition);
}
.mobile-nav-list li a:hover { color: var(--brand); background: var(--brand-glow); }
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 1500;
}
.nav-overlay.show { display: block; }

/* ===== 面包屑 ===== */
.breadcrumb-nav {
  background: var(--bg-section);
  border-bottom: 1px solid var(--border-card);
  padding: 8px 0;
}
.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  font-size: 0.8rem;
}
.breadcrumb-list li { display: flex; align-items: center; gap: 4px; }
.breadcrumb-list a { color: var(--text-muted); }
.breadcrumb-list a:hover { color: var(--brand); }
.bc-sep { color: var(--text-muted); }
.bc-current { color: var(--brand); font-weight: 600; }

/* ===== HERO BANNER ===== */
.hero-banner {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--bg-deep);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/banner.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.35);
  transform: scale(1.02);
  transition: transform 8s ease;
}
.hero-banner:hover .hero-bg { transform: scale(1.06); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(13,13,15,0.85) 0%, rgba(255,106,0,0.08) 50%, rgba(13,13,15,0.9) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 0;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--brand-glow);
  border: 1px solid var(--brand);
  color: var(--brand);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero-badge::before { content: '▶'; font-size: 0.7rem; }
.hero-title {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero-title .accent { color: var(--brand); }
.hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--text-sub);
  max-width: 600px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--brand);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border: 2px solid var(--brand);
}
.btn-primary:hover {
  background: var(--brand-dark);
  border-color: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
  color: #fff;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-card);
  transition: var(--transition);
}
.btn-outline:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-glow);
}
.hero-stats {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.hero-stat { display: flex; flex-direction: column; gap: 4px; }
.hero-stat-num {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--brand);
  line-height: 1;
}
.hero-stat-label { font-size: 0.78rem; color: var(--text-muted); }

/* ===== 通用区块 ===== */
.section {
  padding: 72px 0;
}
.section-alt {
  background: var(--bg-section);
}
.section-dark {
  background: var(--bg-alt);
}
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  background: var(--brand-glow);
  color: var(--brand);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid var(--brand);
  letter-spacing: 1px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}
.section-title .accent { color: var(--brand); }
.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-sub);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ===== 视频网格 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-card);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}
.video-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand);
  box-shadow: var(--shadow-glow);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-alt);
}
.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); }
.video-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-muted);
}
.play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: var(--transition);
}
.video-card:hover .play-overlay {
  background: rgba(0,0,0,0.45);
}
.play-btn-circle {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.7);
  transition: var(--transition);
  box-shadow: 0 0 20px rgba(255,106,0,0.5);
}
.video-card:hover .play-btn-circle {
  opacity: 1;
  transform: scale(1);
}
.play-btn-circle::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-quality {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--brand);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 3px;
}
.video-tag-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(0,0,0,0.7);
  color: var(--brand);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 3px;
  border: 1px solid var(--brand);
}
.video-info {
  padding: 14px 16px;
}
.video-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.45;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.video-meta-item { display: flex; align-items: center; gap: 4px; }

/* ===== 功能卡片 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--border-card);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--brand-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.feature-card:hover {
  border-color: var(--brand);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  display: block;
}
.feature-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}
.feature-desc {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ===== TikTok风格卡片 ===== */
.tiktok-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.tiktok-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-card);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}
.tiktok-card:hover {
  transform: translateY(-4px) scale(1.02);
  border-color: var(--brand);
  box-shadow: var(--shadow-glow);
}
.tiktok-thumb {
  aspect-ratio: 9/16;
  background: var(--bg-alt);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.tiktok-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.tiktok-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  background: rgba(0,0,0,0.4);
  transition: var(--transition);
}
.tiktok-card:hover .tiktok-play { opacity: 1; }
.tiktok-play-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
}
.tiktok-play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 8px 0 8px 14px;
  border-color: transparent transparent transparent #fff;
  margin-left: 3px;
}
.tiktok-info {
  padding: 10px 12px;
}
.tiktok-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 6px;
}
.tiktok-views {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ===== AI功能卡片 ===== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.ai-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255,106,0,0.04) 100%);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}
.ai-card:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}
.ai-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
}
.ai-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}
.ai-desc {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.7;
}
.ai-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--brand);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 3px;
  letter-spacing: 0.5px;
}

/* ===== 专家卡片 ===== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-card);
  transition: var(--transition);
}
.expert-card:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.expert-avatar {
  width: 100%;
  aspect-ratio: 1;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  position: relative;
  overflow: hidden;
}
.expert-avatar-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(to top, rgba(13,13,15,0.9), transparent);
}
.expert-info {
  padding: 20px;
}
.expert-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 4px;
}
.expert-role {
  font-size: 0.8rem;
  color: var(--brand);
  font-weight: 600;
  margin-bottom: 10px;
}
.expert-cert {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.5;
}
.expert-stats {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
}
.expert-stat { display: flex; flex-direction: column; gap: 2px; }
.expert-stat-num { font-size: 1rem; font-weight: 800; color: var(--brand); }
.expert-stat-label { font-size: 0.68rem; color: var(--text-muted); }
.expert-actions {
  display: flex;
  gap: 8px;
}
.btn-sm {
  flex: 1;
  padding: 7px 12px;
  font-size: 0.78rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-align: center;
  transition: var(--transition);
}
.btn-sm-primary {
  background: var(--brand);
  color: #fff;
}
.btn-sm-primary:hover { background: var(--brand-dark); color: #fff; }
.btn-sm-outline {
  border: 1px solid var(--border-card);
  color: var(--text-sub);
  background: transparent;
}
.btn-sm-outline:hover { border-color: var(--brand); color: var(--brand); }

/* ===== 合作品牌 ===== */
.brand-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}
.brand-logo-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 16px 28px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-sub);
  transition: var(--transition);
  min-width: 120px;
  text-align: center;
}
.brand-logo-item:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-glow);
  transform: translateY(-2px);
}

/* ===== 步骤指南 ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  counter-reset: step-counter;
}
.step-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--border-card);
  position: relative;
  transition: var(--transition);
}
.step-card:hover {
  border-color: var(--brand);
  transform: translateY(-3px);
}
.step-num {
  font-size: 3rem;
  font-weight: 900;
  color: var(--brand);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.step-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}
.step-desc {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ===== 用户评价 ===== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-card);
  transition: var(--transition);
  position: relative;
}
.review-card:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-glow);
}
.review-quote {
  font-size: 3rem;
  color: var(--brand);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: -8px;
  font-family: Georgia, serif;
}
.review-text {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 16px;
}
.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--brand-glow);
  border: 2px solid var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.review-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
}
.review-role {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.review-stars {
  color: #ffd700;
  font-size: 0.85rem;
  margin-top: 2px;
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: var(--brand); }
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  gap: 16px;
  transition: var(--transition);
}
.faq-q:hover { color: var(--brand); }
.faq-item.open .faq-q { color: var(--brand); }
.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--brand-glow);
  border: 1px solid var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  font-size: 0.9rem;
  font-weight: 900;
  transition: transform 0.3s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 22px;
}
.faq-item.open .faq-a {
  max-height: 300px;
  padding: 0 22px 18px;
}
.faq-a p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.8;
}

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.contact-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  border: 1px solid var(--border-card);
  transition: var(--transition);
}
.contact-card:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-glow);
}
.contact-icon { font-size: 2rem; margin-bottom: 14px; }
.contact-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}
.contact-info {
  font-size: 0.85rem;
  color: var(--text-sub);
  line-height: 1.8;
}
.contact-info a { color: var(--brand); }
.contact-info a:hover { color: var(--brand-light); }

/* ===== 统计数字 ===== */
.stats-bar {
  background: linear-gradient(135deg, var(--bg-alt) 0%, rgba(255,106,0,0.05) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 40px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 32px;
  text-align: center;
}
.stat-item { display: flex; flex-direction: column; gap: 6px; }
.stat-num {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--brand);
  line-height: 1;
}
.stat-label { font-size: 0.82rem; color: var(--text-muted); }

/* ===== 分享按钮 ===== */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 20px 0;
}
.share-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  border: 1px solid var(--border-card);
  background: var(--bg-card);
  color: var(--text-sub);
  transition: var(--transition);
}
.share-btn:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-glow);
}

/* ===== 底部 ===== */
.site-footer {
  background: var(--bg-section);
  border-top: 1px solid var(--border);
  margin-top: 0;
}
.footer-main { padding: 64px 0 40px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  color: var(--text-main);
}
.footer-logo img { width: 36px; height: 36px; border-radius: 8px; }
.footer-logo span { font-size: 1.2rem; font-weight: 900; color: var(--brand); }
.footer-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}
.footer-social { display: flex; gap: 8px; flex-wrap: wrap; }
.social-btn {
  padding: 6px 14px;
  background: var(--bg-alt);
  border: 1px solid var(--border-card);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-sub);
  transition: var(--transition);
  cursor: pointer;
}
.social-btn:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-glow);
}
.footer-col-title {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-card);
}
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--brand); padding-left: 4px; }
.footer-contact-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}
.footer-contact-info p { font-size: 0.82rem; color: var(--text-muted); }
.footer-contact-info a { color: var(--brand); }
.footer-qr-wrap { display: flex; gap: 16px; }
.footer-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.footer-qr span { font-size: 0.72rem; color: var(--text-muted); }
.qr-placeholder {
  width: 90px;
  height: 90px;
  background: #fff;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.footer-bottom {
  background: var(--bg-deep);
  border-top: 1px solid var(--border-card);
  padding: 16px 0;
}
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-copyright { font-size: 0.78rem; color: var(--text-muted); }
.footer-bottom-links { display: flex; gap: 16px; }
.footer-bottom-links a { font-size: 0.78rem; color: var(--text-muted); }
.footer-bottom-links a:hover { color: var(--brand); }

/* ===== 图片展示区 ===== */
.img-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.img-showcase-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
  position: relative;
}
.img-showcase-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.img-showcase-item:hover img { transform: scale(1.06); }

/* ===== 标签 ===== */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
}
.tag-orange { background: var(--brand-glow); color: var(--brand); border: 1px solid var(--brand); }
.tag-gray { background: var(--bg-alt); color: var(--text-muted); border: 1px solid var(--border-card); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .hamburger { display: flex; }
  .btn-join { display: none; }
  .hero-banner { min-height: 420px; }
  .hero-title { font-size: 1.8rem; }
  .hero-stats { gap: 24px; }
  .section { padding: 48px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-contact { order: -1; }
  .img-showcase { grid-template-columns: 1fr 1fr; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .tiktok-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
  .img-showcase { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 16px; }
  .hero-stat-num { font-size: 1.4rem; }
  .search-tags { display: none; }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255,106,0,0); }
  50% { box-shadow: 0 0 20px 4px rgba(255,106,0,0.3); }
}
.fade-in-up { animation: fadeInUp 0.6s ease both; }
.pulse-glow { animation: pulse-glow 2s ease-in-out infinite; }

/* ===== 通知弹窗 ===== */
.search-toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--bg-card);
  border: 1px solid var(--brand);
  color: var(--text-main);
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s ease;
  white-space: nowrap;
  box-shadow: var(--shadow-glow);
}
.search-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== 视频播放模态框 ===== */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 9000;
  align-items: center;
  justify-content: center;
}
.video-modal.open { display: flex; }
.video-modal-inner {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 800px;
  width: 90%;
  border: 1px solid var(--border);
  position: relative;
}
.video-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: transparent;
  color: var(--text-sub);
  font-size: 1.4rem;
  padding: 4px 8px;
  z-index: 1;
}
.video-modal-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-right: 40px;
}
.video-placeholder {
  aspect-ratio: 16/9;
  background: var(--bg-alt);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  color: var(--text-muted);
}
.video-placeholder-icon { font-size: 3rem; }
.video-placeholder-text { font-size: 0.9rem; }