/* 抖阴 - 原创CSS样式表 */

/* ========== 全局样式 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-dark: #0F1419;
  --accent-orange: #FF6B35;
  --accent-cyan: #00D9FF;
  --bg-light: #F5F5F5;
  --text-dark: #2A2A2A;
  --text-light: #FFFFFF;
  --border-light: #E0E0E0;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
  --transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

html, body {
  font-family: 'Source Han Sans CN', 'Noto Sans CJK SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  scroll-behavior: smooth;
}

/* ========== 导航栏 ========== */
header {
  background-color: var(--primary-dark);
  color: var(--text-light);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.navbar {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-img {
  height: 50px;
  width: auto;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-menu a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-menu a:hover {
  color: var(--accent-orange);
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-orange);
  transition: width 0.3s ease;
}

.nav-menu a:hover::after {
  width: 100%;
}

.search-box {
  display: flex;
  align-items: center;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  padding: 0.5rem 1rem;
  gap: 0.5rem;
  cursor: pointer;
  transition: var(--transition);
}

.search-box:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-cyan);
}

.search-box input {
  background: none;
  border: none;
  color: var(--text-light);
  outline: none;
  width: 150px;
  font-size: 0.9rem;
}

.search-box input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

/* ========== Hero区域 ========== */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, #1a2332 100%);
  background-image: url('https://d2xsxph8kpxj0f.cloudfront.net/310519663492518559/cNRgh5KDj2T6T5EFdFTLFQ/racing_hero_bg-5X9xspRazJWbp5ybnrsjqa.webp');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: var(--text-light);
  padding: 8rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 20, 25, 0.6);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.hero h1 .highlight {
  color: var(--accent-orange);
}

.hero p {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 300;
}

.cta-button {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-orange) 0%, #FF8C42 100%);
  color: var(--text-light);
  padding: 1rem 2.5rem;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

/* ========== 内容区域通用样式 ========== */
.section {
  max-width: 1400px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--primary-dark);
  text-align: center;
}

.section-title .brand {
  color: var(--accent-orange);
}

.section-subtitle {
  font-size: 1.1rem;
  color: #666;
  text-align: center;
  margin-bottom: 3rem;
}

/* ========== 卡片网格 ========== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: var(--text-light);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  cursor: pointer;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--primary-dark), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-content {
  padding: 1.5rem;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--primary-dark);
}

.card-desc {
  font-size: 0.95rem;
  color: #666;
  margin-bottom: 1rem;
  line-height: 1.5;
}

.card-stats {
  display: flex;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: #999;
}

.stat {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* ========== 视频卡片 ========== */
.video-card {
  position: relative;
  background: var(--text-light);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.video-card:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.video-thumbnail {
  width: 100%;
  height: 180px;
  background: linear-gradient(135deg, var(--primary-dark), var(--accent-cyan));
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.video-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.play-button {
  position: absolute;
  width: 60px;
  height: 60px;
  background: rgba(255, 107, 53, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition);
  z-index: 10;
}

.play-button::after {
  content: '▶';
  color: var(--text-light);
  font-size: 1.5rem;
  margin-left: 4px;
}

.video-card:hover .play-button {
  opacity: 1;
  transform: scale(1);
}

.video-info {
  padding: 1rem;
}

.video-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 0.5rem;
}

.video-meta {
  font-size: 0.8rem;
  color: #999;
}

/* ========== 专家展示 ========== */
.expert-card {
  background: var(--text-light);
  border-radius: 8px;
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.expert-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.expert-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: var(--text-light);
}

.expert-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 0.3rem;
}

.expert-title {
  font-size: 0.9rem;
  color: var(--accent-orange);
  margin-bottom: 0.5rem;
}

.expert-desc {
  font-size: 0.85rem;
  color: #666;
  margin-bottom: 1rem;
}

.expert-buttons {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

.btn-small {
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent-orange);
  background: transparent;
  color: var(--accent-orange);
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: var(--transition);
}

.btn-small:hover {
  background: var(--accent-orange);
  color: var(--text-light);
}

/* ========== FAQ ========== */
.faq-item {
  background: var(--text-light);
  border-left: 4px solid var(--accent-orange);
  padding: 1.5rem;
  margin-bottom: 1rem;
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: var(--transition);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
}

.faq-question {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.faq-toggle {
  font-size: 1.5rem;
  color: var(--accent-orange);
  transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
  transform: rotate(180deg);
}

.faq-answer {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.6;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  margin-top: 1rem;
}

/* ========== 评论区 ========== */
.review-card {
  background: var(--text-light);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.review-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.review-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-orange), var(--accent-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-weight: 700;
}

.review-info {
  flex: 1;
}

.review-name {
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 0.2rem;
}

.review-rating {
  color: var(--accent-orange);
  font-size: 0.9rem;
}

.review-text {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.6;
}

/* ========== 页脚 ========== */
footer {
  background-color: var(--primary-dark);
  color: var(--text-light);
  padding: 3rem 2rem 1rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
  color: var(--accent-orange);
}

.footer-section p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: var(--transition);
}

.footer-section a:hover {
  color: var(--accent-orange);
}

.qrcode-section {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.qrcode-item {
  text-align: center;
}

.qrcode-item img {
  width: 120px;
  height: 120px;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

.qrcode-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.8);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
}

.social-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1rem;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: var(--text-light);
  text-decoration: none;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--accent-orange);
  transform: translateY(-4px);
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section {
    padding: 2rem 1rem;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }

  .qrcode-section {
    gap: 1rem;
  }
}

/* ========== 懒加载占位符 ========== */
.lazy-load {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ========== 动画 ========== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}

/* ========== 干扰标签容器 ========== */
.interference-wrapper {
  display: none;
}