/* =============================================
   樱花视频 - 主样式文件
   风格：霓虹粉蓝渐变 · 明亮潮流 · 沉浸科技娱乐
   ============================================= */

/* ---- 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', 'Helvetica Neue', Arial, sans-serif;
  background: #f8f9ff;
  color: #1a1a2e;
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color 0.3s; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* ---- CSS变量 ---- */
:root {
  --pink: #ff4da6;
  --blue: #00c6ff;
  --purple: #a855f7;
  --gradient: linear-gradient(135deg, #ff4da6 0%, #a855f7 50%, #00c6ff 100%);
  --gradient-soft: linear-gradient(135deg, rgba(255,77,166,0.12) 0%, rgba(168,85,247,0.08) 50%, rgba(0,198,255,0.12) 100%);
  --white: #ffffff;
  --light-bg: #f8f9ff;
  --card-bg: #ffffff;
  --text-dark: #1a1a2e;
  --text-gray: #6b7280;
  --border: rgba(168,85,247,0.15);
  --shadow: 0 8px 32px rgba(168,85,247,0.12);
  --shadow-hover: 0 16px 48px rgba(255,77,166,0.25);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
}

/* ---- 滚动条 ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f0f0f8; }
::-webkit-scrollbar-thumb { background: var(--gradient); border-radius: 3px; }

/* ---- 顶部导航 ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(168,85,247,0.08);
}
.navbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}
.navbar-logo .logo-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.navbar-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-dark);
  transition: var(--transition);
  white-space: nowrap;
}
.navbar-nav a:hover,
.navbar-nav a.active {
  background: var(--gradient-soft);
  color: var(--pink);
}
.navbar-cta {
  background: var(--gradient);
  color: #fff !important;
  padding: 9px 20px !important;
  border-radius: 24px !important;
  font-weight: 600 !important;
  box-shadow: 0 4px 15px rgba(255,77,166,0.35);
}
.navbar-cta:hover {
  background: var(--gradient) !important;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255,77,166,0.45) !important;
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}
.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--gradient);
  border-radius: 2px;
  display: block;
  transition: var(--transition);
}

/* ---- 搜索栏 ---- */
.search-bar-wrap {
  background: linear-gradient(135deg, rgba(255,77,166,0.06) 0%, rgba(0,198,255,0.06) 100%);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
}
.search-bar-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  background: #fff;
  border: 2px solid transparent;
  border-radius: 32px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(168,85,247,0.1);
  transition: var(--transition);
  background-clip: padding-box;
  position: relative;
}
.search-bar-inner::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 34px;
  background: var(--gradient);
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s;
}
.search-bar-inner:focus-within::before { opacity: 1; }
.search-bar-inner:focus-within { border-color: transparent; }
.search-input {
  flex: 1;
  border: none;
  outline: none;
  padding: 12px 20px;
  font-size: 0.95rem;
  background: transparent;
  color: var(--text-dark);
}
.search-input::placeholder { color: #b0b8c9; }
.search-btn {
  background: var(--gradient);
  border: none;
  padding: 12px 24px;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.search-btn:hover { opacity: 0.9; }
.search-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 720px;
  margin: 8px auto 0;
  flex-wrap: wrap;
}
.search-tags span { font-size: 0.8rem; color: var(--text-gray); }
.search-tag {
  font-size: 0.78rem;
  padding: 3px 10px;
  border-radius: 12px;
  background: var(--gradient-soft);
  color: var(--purple);
  cursor: pointer;
  transition: var(--transition);
}
.search-tag:hover { background: var(--gradient); color: #fff; }

/* ---- 通用容器 ---- */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-sm { padding: 56px 0; }

/* ---- 区块标题 ---- */
.section-header { text-align: center; margin-bottom: 52px; }
.section-tag {
  display: inline-block;
  padding: 5px 16px;
  border-radius: 20px;
  background: var(--gradient-soft);
  color: var(--pink);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
  border: 1px solid rgba(255,77,166,0.2);
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.3;
  margin-bottom: 14px;
}
.section-title .highlight {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc { color: var(--text-gray); font-size: 1rem; max-width: 560px; margin: 0 auto; }

/* ---- Hero Banner ---- */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #fff0f8 0%, #f0f4ff 50%, #e8f8ff 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,240,248,0.7) 0%, rgba(240,244,255,0.5) 50%, rgba(232,248,255,0.7) 100%);
}
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}
.particle {
  position: absolute;
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}
.p1 { width: 8px; height: 8px; background: var(--pink); top: 20%; left: 10%; opacity: 0.6; animation-delay: 0s; }
.p2 { width: 5px; height: 5px; background: var(--blue); top: 60%; left: 5%; opacity: 0.5; animation-delay: 1s; }
.p3 { width: 10px; height: 10px; background: var(--purple); top: 30%; right: 15%; opacity: 0.5; animation-delay: 2s; }
.p4 { width: 6px; height: 6px; background: var(--pink); top: 70%; right: 10%; opacity: 0.6; animation-delay: 0.5s; }
.p5 { width: 7px; height: 7px; background: var(--blue); top: 45%; left: 50%; opacity: 0.4; animation-delay: 1.5s; }
.p6 { width: 4px; height: 4px; background: var(--purple); top: 15%; right: 40%; opacity: 0.5; animation-delay: 3s; }
@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-20px) scale(1.1); }
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}
.hero-text { }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(255,77,166,0.1);
  border: 1px solid rgba(255,77,166,0.3);
  color: var(--pink);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--pink);
  animation: pulse 1.5s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.hero-title {
  font-size: clamp(2rem, 4.5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.2;
  color: var(--text-dark);
  margin-bottom: 20px;
}
.hero-title .grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-gray);
  margin-bottom: 36px;
  line-height: 1.8;
  max-width: 480px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 32px;
  background: var(--gradient);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  box-shadow: 0 6px 24px rgba(255,77,166,0.4);
  transition: var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(255,77,166,0.5); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 32px;
  background: #fff;
  color: var(--purple);
  font-size: 1rem;
  font-weight: 700;
  border: 2px solid var(--purple);
  transition: var(--transition);
  cursor: pointer;
}
.btn-secondary:hover { background: var(--gradient-soft); transform: translateY(-2px); }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
}
.stat-item { }
.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}
.stat-label { font-size: 0.8rem; color: var(--text-gray); margin-top: 4px; }
.hero-visual { position: relative; }
.hero-video-card {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(168,85,247,0.2);
  position: relative;
  cursor: pointer;
}
.hero-video-card img { width: 100%; height: 360px; object-fit: cover; }
.hero-video-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.5) 0%, transparent 60%);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}
.hero-video-card:hover .hero-video-overlay { opacity: 1; }
.play-btn-large {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--pink);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  transition: var(--transition);
}
.play-btn-large:hover { transform: scale(1.1); background: #fff; }
.hero-float-cards {
  position: absolute;
  top: -20px;
  right: -20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.float-card {
  background: #fff;
  border-radius: 12px;
  padding: 12px 16px;
  box-shadow: 0 8px 24px rgba(168,85,247,0.15);
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 160px;
  animation: floatCard 4s ease-in-out infinite;
}
.float-card:nth-child(2) { animation-delay: 1s; }
.float-card-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}
.float-card-text .label { font-size: 0.72rem; color: var(--text-gray); }
.float-card-text .value { font-size: 0.9rem; font-weight: 700; color: var(--text-dark); }
@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ---- 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-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid var(--border);
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.video-play-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.1) 60%);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .video-play-overlay { opacity: 1; }
.play-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255,255,255,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--pink);
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  transition: var(--transition);
}
.play-btn:hover { transform: scale(1.1); }
.video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
}
.badge-new { background: var(--pink); }
.badge-hot { background: #ff6b35; }
.badge-ai { background: var(--purple); }
.badge-vip { background: linear-gradient(135deg, #f6d365, #fda085); }
.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-info { padding: 16px; }
.video-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
  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: 0.78rem;
  color: var(--text-gray);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.video-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--gradient-soft);
  color: var(--purple);
}

/* ---- 社区弹幕 ---- */
.danmaku-wrap {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  border-radius: var(--radius);
  padding: 24px;
  overflow: hidden;
  position: relative;
  min-height: 120px;
}
.danmaku-row {
  display: flex;
  gap: 20px;
  margin-bottom: 12px;
  animation: danmakuScroll 20s linear infinite;
  white-space: nowrap;
}
.danmaku-row:nth-child(2) { animation-duration: 25s; animation-delay: -5s; }
.danmaku-row:nth-child(3) { animation-duration: 18s; animation-delay: -10s; }
@keyframes danmakuScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.danmaku-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  color: #fff;
  white-space: nowrap;
  flex-shrink: 0;
}
.dm-pink { background: rgba(255,77,166,0.25); border: 1px solid rgba(255,77,166,0.4); }
.dm-blue { background: rgba(0,198,255,0.2); border: 1px solid rgba(0,198,255,0.35); }
.dm-purple { background: rgba(168,85,247,0.2); border: 1px solid rgba(168,85,247,0.35); }

/* ---- AI模块 ---- */
.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.ai-tool-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}
.ai-tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255,77,166,0.3);
}
.ai-tool-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin: 0 auto 16px;
  box-shadow: 0 8px 24px rgba(255,77,166,0.3);
}
.ai-tool-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}
.ai-tool-desc { font-size: 0.85rem; color: var(--text-gray); line-height: 1.6; }

/* ---- 专家卡片 ---- */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.expert-avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  margin: 0 auto 16px;
  overflow: hidden;
  border: 3px solid transparent;
  background: var(--gradient) border-box;
  box-shadow: 0 4px 16px rgba(255,77,166,0.25);
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-name { font-size: 1rem; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; }
.expert-role {
  font-size: 0.8rem;
  color: var(--pink);
  font-weight: 600;
  margin-bottom: 10px;
}
.expert-desc { font-size: 0.82rem; color: var(--text-gray); line-height: 1.6; }

/* ---- 用户评价 ---- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.review-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
}
.review-name { font-size: 0.9rem; font-weight: 700; color: var(--text-dark); }
.review-stars { color: #fbbf24; font-size: 0.8rem; margin-top: 2px; }
.review-text { font-size: 0.88rem; color: var(--text-gray); line-height: 1.7; }
.review-tag {
  display: inline-block;
  margin-top: 12px;
  padding: 3px 10px;
  border-radius: 10px;
  background: var(--gradient-soft);
  color: var(--purple);
  font-size: 0.75rem;
}

/* ---- FAQ ---- */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(255,77,166,0.3); }
.faq-question {
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dark);
  gap: 12px;
}
.faq-question:hover { color: var(--pink); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pink);
  font-size: 0.9rem;
  flex-shrink: 0;
  transition: transform 0.3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  font-size: 0.88rem;
  color: var(--text-gray);
  line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 200px; padding-bottom: 18px; }

/* ---- 合作伙伴 ---- */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  padding: 16px 28px;
  border: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-gray);
  transition: var(--transition);
  min-width: 120px;
  text-align: center;
}
.partner-item:hover { border-color: var(--pink); color: var(--pink); transform: translateY(-2px); box-shadow: var(--shadow); }

/* ---- 联系模块 ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}
.contact-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.contact-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin: 0 auto 16px;
}
.contact-title { font-size: 1rem; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.contact-value { font-size: 0.88rem; color: var(--text-gray); line-height: 1.7; }
.qr-placeholder {
  width: 100px;
  height: 100px;
  background: var(--gradient-soft);
  border: 2px dashed var(--purple);
  border-radius: 12px;
  margin: 12px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--purple);
  text-align: center;
  line-height: 1.4;
}

/* ---- 页脚 ---- */
.footer {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .brand-name {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.footer-brand p { font-size: 0.85rem; line-height: 1.8; max-width: 280px; }
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 0.83rem;
  color: rgba(255,255,255,0.6);
  transition: color 0.3s;
}
.footer-col ul li a:hover { color: var(--pink); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 0.82rem; }
.footer-social { display: flex; gap: 12px; }
.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
  transition: var(--transition);
  cursor: pointer;
}
.social-btn:hover { background: var(--gradient); color: #fff; }

/* ---- 话题社区 ---- */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.topic-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.topic-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.topic-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.topic-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
}
.topic-name { font-size: 0.95rem; font-weight: 700; color: var(--text-dark); }
.topic-count { font-size: 0.78rem; color: var(--text-gray); }
.topic-preview { font-size: 0.83rem; color: var(--text-gray); line-height: 1.6; }
.topic-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.topic-tag {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--gradient-soft);
  color: var(--purple);
}

/* ---- 加入社区引导 ---- */
.join-section {
  background: var(--gradient);
  border-radius: 24px;
  padding: 60px 40px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.join-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
  animation: shimmer 4s ease-in-out infinite;
}
@keyframes shimmer {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(10%, 5%); }
}
.join-section h2 { font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.join-section p { font-size: 1rem; opacity: 0.9; margin-bottom: 28px; }
.join-steps {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.join-step { text-align: center; }
.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  margin: 0 auto 8px;
}
.step-text { font-size: 0.85rem; opacity: 0.9; }
.btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  border-radius: 32px;
  background: #fff;
  color: var(--pink);
  font-size: 1rem;
  font-weight: 700;
  transition: var(--transition);
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(0,0,0,0.15);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(0,0,0,0.2); }

/* ---- 面包屑 ---- */
.breadcrumb {
  padding: 14px 0;
  font-size: 0.83rem;
  color: var(--text-gray);
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb a { color: var(--text-gray); }
.breadcrumb a:hover { color: var(--pink); }
.breadcrumb .sep { opacity: 0.4; }
.breadcrumb .current { color: var(--pink); font-weight: 600; }

/* ---- 内页 Banner ---- */
.inner-hero {
  background: var(--gradient);
  padding: 60px 0;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.inner-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/banner_hero.jpg') center/cover no-repeat;
  opacity: 0.15;
}
.inner-hero-content { position: relative; z-index: 1; }
.inner-hero h1 { font-size: clamp(1.8rem, 3vw, 2.8rem); font-weight: 900; margin-bottom: 12px; }
.inner-hero p { font-size: 1rem; opacity: 0.9; max-width: 560px; margin: 0 auto; }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .navbar-nav { display: none; }
  .hamburger { display: flex; }
  .navbar-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 32px rgba(168,85,247,0.1);
    z-index: 999;
  }
  .section { padding: 56px 0; }
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .join-steps { gap: 24px; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
}

/* ---- 工具类 ---- */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.hidden { display: none; }

/* ---- 懒加载占位 ---- */
img[data-src] { background: linear-gradient(135deg, #f0f0f8, #e8e8f5); }

/* ---- 动画 ---- */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }