/* =============================================
   看片 - 主样式文件
   原创设计 | y12wtc.cn
   ============================================= */

/* ---- CSS 变量 ---- */
:root {
  --primary: #E53935;
  --primary-dark: #AB000D;
  --secondary: #8E24AA;
  --accent: #FFB300;
  --dark: #1A1A2E;
  --dark-2: #16213E;
  --dark-3: #0F3460;
  --light: #F8F9FA;
  --light-2: #F0F2F5;
  --text-main: #2D2D3A;
  --text-muted: #6C757D;
  --white: #FFFFFF;
  --border: #E8ECF0;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --transition: all 0.3s ease;
  --font-main: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  color: var(--text-main);
  background: var(--light);
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; font-family: var(--font-main); }
input, textarea, select { font-family: var(--font-main); outline: none; }

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--dark); }
h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.2rem; }
p { margin-bottom: 0.8rem; }

/* ---- Layout ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 70px 0; }
.section-sm { padding: 40px 0; }
.row { display: flex; flex-wrap: wrap; gap: 24px; }
.col-2 { flex: 0 0 calc(50% - 12px); }
.col-3 { flex: 0 0 calc(33.333% - 16px); }
.col-4 { flex: 0 0 calc(25% - 18px); }

/* ---- Gradient Text ---- */
.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-xl);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(229,57,53,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(229,57,53,0.5);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }

/* ---- Section Headers ---- */
.section-header { text-align: center; margin-bottom: 50px; }
.section-header .tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(229,57,53,0.15), rgba(196,79,216,0.15));
  color: var(--primary);
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 12px;
  border: 1px solid rgba(229,57,53,0.3);
}
.section-header h2 { margin-bottom: 12px; }
.section-header p { color: var(--text-muted); max-width: 560px; margin: 0 auto; }
.divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
  margin: 16px auto 0;
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(26,26,46,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229,57,53,0.2);
  transition: var(--transition);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img { height: 40px; width: auto; }
.logo-text {
  font-size: 1.3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: rgba(255,255,255,0.85);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--primary);
  background: rgba(229,57,53,0.12);
}
.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.header-actions .btn-primary { padding: 9px 20px; font-size: 0.88rem; }

/* Search Bar */
.search-bar-wrap {
  background: var(--dark-2);
  border-bottom: 1px solid rgba(229,57,53,0.15);
  padding: 10px 0;
}
.search-bar-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 700px;
  margin: 0 auto;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(229,57,53,0.25);
  border-radius: var(--radius-xl);
  padding: 8px 16px;
  transition: var(--transition);
}
.search-bar-inner:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(229,57,53,0.15);
}
.search-bar-inner input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--white);
  font-size: 0.95rem;
  padding: 2px 0;
}
.search-bar-inner input::placeholder { color: rgba(255,255,255,0.45); }
.search-bar-inner button {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white);
  border: none;
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 0.88rem;
  font-weight: 600;
  transition: var(--transition);
}
.search-bar-inner button:hover { opacity: 0.9; transform: scale(1.03); }
.search-icon { color: rgba(255,255,255,0.5); font-size: 1rem; }

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  padding: 6px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* Breadcrumb */
.breadcrumb {
  background: var(--light-2);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumb-list a { color: var(--primary); }
.breadcrumb-list a:hover { text-decoration: underline; }
.breadcrumb-list .sep { color: var(--border); }

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 50%, var(--dark-3) 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  filter: blur(2px);
  transform: scale(1.05);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(196,79,216,0.25) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
  padding: 80px 0;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(229,57,53,0.2);
  border: 1px solid rgba(229,57,53,0.4);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-badge::before { content: '▶'; font-size: 0.7rem; }
.hero h1 { color: var(--white); margin-bottom: 16px; }
.hero h1 span { color: var(--primary); }
.hero-desc { color: rgba(255,255,255,0.8); font-size: 1.05rem; margin-bottom: 32px; max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.15);
}
.hero-stat-item { text-align: center; }
.hero-stat-item .num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
}
.hero-stat-item .label { font-size: 0.82rem; color: rgba(255,255,255,0.6); }

/* ============================================
   VIDEO CARDS
   ============================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--dark);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .play-btn { opacity: 1; }
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(229,57,53,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: transform 0.3s ease;
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  border-left: 20px solid white;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: var(--white);
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 9px;
  border-radius: 4px;
}
.video-info { padding: 14px 16px; }
.video-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.video-meta .author { display: flex; align-items: center; gap: 5px; }
.video-meta .author img {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  object-fit: cover;
}
.video-stats { display: flex; gap: 10px; }
.video-stats span { display: flex; align-items: center; gap: 3px; }

/* ============================================
   FEATURE MODULES
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(229,57,53,0.15), rgba(196,79,216,0.15));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
}
.feature-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.feature-card p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }

/* ============================================
   EXPERT SECTION
   ============================================ */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  text-align: center;
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.expert-avatar {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  max-height: 200px;
}
.expert-info { padding: 20px 16px; }
.expert-info h4 { font-size: 1.05rem; margin-bottom: 4px; }
.expert-role {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.expert-desc { font-size: 0.83rem; color: var(--text-muted); margin-bottom: 14px; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 14px; }
.expert-tag {
  background: var(--light-2);
  color: var(--text-muted);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 20px;
}
.expert-actions { display: flex; gap: 8px; justify-content: center; }
.expert-actions .btn { padding: 7px 14px; font-size: 0.8rem; }

/* ============================================
   COMMUNITY / DARK SECTION
   ============================================ */
.section-dark {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
  color: var(--white);
}
.section-dark .section-header h2 { color: var(--white); }
.section-dark .section-header p { color: rgba(255,255,255,0.65); }
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.community-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
}
.community-card:hover {
  background: rgba(229,57,53,0.12);
  border-color: rgba(229,57,53,0.4);
  transform: translateY(-3px);
}
.community-card .icon { font-size: 2.2rem; margin-bottom: 12px; }
.community-card h4 { color: var(--white); font-size: 1rem; margin-bottom: 8px; }
.community-card p { color: rgba(255,255,255,0.6); font-size: 0.85rem; margin: 0; }

/* ============================================
   AI SECTION
   ============================================ */
.ai-section { background: linear-gradient(135deg, #0F0F1A 0%, #1A0A2E 100%); }
.ai-section .section-header h2 { color: var(--white); }
.ai-section .section-header p { color: rgba(255,255,255,0.6); }
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.ai-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(196,79,216,0.25);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}
.ai-card::after {
  content: '';
  position: absolute;
  bottom: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(196,79,216,0.2), transparent);
  border-radius: 50%;
}
.ai-card:hover {
  border-color: var(--secondary);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(196,79,216,0.2);
}
.ai-card .ai-icon { font-size: 2rem; margin-bottom: 14px; }
.ai-card h4 { color: var(--white); font-size: 1.05rem; margin-bottom: 8px; }
.ai-card p { color: rgba(255,255,255,0.6); font-size: 0.85rem; margin: 0; }

/* ============================================
   PARTNER LOGOS
   ============================================ */
.partner-section { background: var(--light-2); }
.partner-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}
.partner-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 28px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
  min-width: 120px;
  text-align: center;
}
.partner-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* ============================================
   HOW TO JOIN
   ============================================ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.steps-grid::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  z-index: 0;
}
.step-item { text-align: center; position: relative; z-index: 1; }
.step-num {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  margin: 0 auto 16px;
  box-shadow: 0 4px 15px rgba(229,57,53,0.4);
}
.step-item h4 { font-size: 1rem; margin-bottom: 8px; }
.step-item p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

/* ============================================
   REVIEWS
   ============================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.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(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.review-user h5 { font-size: 0.95rem; margin-bottom: 2px; }
.review-user .date { font-size: 0.78rem; color: var(--text-muted); }
.stars { color: #FFB300; font-size: 0.9rem; margin-bottom: 8px; }
.review-text { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; margin: 0; }
.review-tag {
  display: inline-block;
  background: rgba(229,57,53,0.1);
  color: var(--primary);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 20px;
  margin-top: 10px;
}

/* ============================================
   FAQ
   ============================================ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(229,57,53,0.4); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--dark);
  transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-toggle {
  width: 28px;
  height: 28px;
  background: var(--light-2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--primary);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-toggle { transform: rotate(45deg); background: var(--primary); color: var(--white); }
.faq-answer {
  padding: 0 22px;
  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: 1.7;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 18px; }

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info h3 { margin-bottom: 20px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}
.contact-item .icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, rgba(229,57,53,0.15), rgba(196,79,216,0.15));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contact-item .detail h5 { font-size: 0.9rem; margin-bottom: 2px; }
.contact-item .detail p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }
.qr-codes { display: flex; gap: 24px; margin-top: 24px; }
.qr-item { text-align: center; }
.qr-item img { width: 120px; height: 120px; border-radius: var(--radius-sm); border: 2px solid var(--border); }
.qr-item p { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }

/* ============================================
   SHARE SECTION
   ============================================ */
.share-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.share-label { font-size: 0.9rem; color: var(--text-muted); font-weight: 600; }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid var(--border);
  background: var(--white);
  color: var(--text-main);
}
.share-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.share-btn.wechat { border-color: #07C160; color: #07C160; }
.share-btn.wechat:hover { background: #07C160; color: white; }
.share-btn.weibo { border-color: #E6162D; color: #E6162D; }
.share-btn.weibo:hover { background: #E6162D; color: white; }
.share-btn.douyin { border-color: #010101; color: #010101; }
.share-btn.douyin:hover { background: #010101; color: white; }
.share-btn.bilibili { border-color: #00A1D6; color: #00A1D6; }
.share-btn.bilibili:hover { background: #00A1D6; color: white; }

/* ============================================
   FOOTER
   ============================================ */
#site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.75);
  padding: 60px 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-text { font-size: 1.4rem; margin-bottom: 12px; display: block; }
.footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.55); line-height: 1.7; margin-bottom: 16px; }
.footer-col h5 {
  color: var(--white);
  font-size: 0.95rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a {
  color: rgba(255,255,255,0.55);
  font-size: 0.88rem;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.55); }
.footer-bottom a:hover { color: var(--primary); }
.footer-logo-bottom { display: flex; align-items: center; gap: 10px; }
.footer-logo-bottom img { height: 32px; }

/* ============================================
   INNER PAGE STYLES
   ============================================ */
.page-hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-3) 100%);
  padding: 60px 0;
  text-align: center;
}
.page-hero h1 { color: var(--white); margin-bottom: 12px; }
.page-hero p { color: rgba(255,255,255,0.7); font-size: 1.05rem; }

/* About Page */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-intro img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.about-text h2 { margin-bottom: 16px; }
.about-text p { color: var(--text-muted); margin-bottom: 16px; }
.about-values { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.value-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  background: var(--light-2);
  border-radius: var(--radius-sm);
}
.value-item .icon { font-size: 1.4rem; flex-shrink: 0; }
.value-item h5 { font-size: 0.9rem; margin-bottom: 4px; }
.value-item p { font-size: 0.82rem; color: var(--text-muted); margin: 0; }

/* ============================================
   UTILITIES
   ============================================ */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 16px; }
.w-100 { width: 100%; }
.hidden { display: none; }
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-primary { background: rgba(229,57,53,0.15); color: var(--primary); }
.badge-secondary { background: rgba(196,79,216,0.15); color: var(--secondary); }
.badge-success { background: rgba(40,167,69,0.15); color: #28a745; }

/* Lazy load */
img[data-src] { opacity: 0; transition: opacity 0.4s ease; }
img.loaded { opacity: 1; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 50px 0; }
  .hero { min-height: 480px; }
  .hero-content { padding: 60px 0; }
  .hero-stats { gap: 20px; }
  .main-nav { display: none; position: fixed; top: 68px; left: 0; right: 0; background: var(--dark); flex-direction: column; padding: 20px; gap: 4px; border-bottom: 1px solid rgba(229,57,53,0.2); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; }
  .menu-toggle { display: flex; }
  .feature-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-intro { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .col-2, .col-3, .col-4 { flex: 0 0 100%; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .container { padding: 0 14px; }
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.3rem; }
  .video-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .qr-codes { flex-direction: column; align-items: center; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.animate-fadeInUp { animation: fadeInUp 0.6s ease forwards; }
.animate-pulse { animation: pulse 2s ease infinite; }
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: #E6162D;
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
}
.live-badge::before {
  content: '';
  width: 7px;
  height: 7px;
  background: white;
  border-radius: 50%;
  animation: pulse 1.2s ease infinite;
}