/* 海角视界 - 全局样式表 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #ff6b35;
  --secondary-color: #004e89;
  --accent-color: #f7b801;
  --text-dark: #1a1a1a;
  --text-light: #666666;
  --bg-light: #f9f9f9;
  --border-color: #e0e0e0;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.15);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: #ffffff;
  overflow-x: hidden;
}

/* 头部导航 */
header {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #003d6b 100%);
  color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo:hover {
  color: #fff;
  transition: color 0.3s ease;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
  flex-wrap: wrap;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

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

nav a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: width 0.3s ease;
}

nav a:hover::after {
  width: 100%;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 25px;
  padding: 8px 15px;
  gap: 8px;
  transition: all 0.3s ease;
}

.search-box:hover,
.search-box:focus-within {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--accent-color);
}

.search-box input {
  background: transparent;
  border: none;
  color: white;
  width: 150px;
  outline: none;
  font-size: 0.95rem;
}

.search-box input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.search-box button {
  background: transparent;
  border: none;
  color: white;
  cursor: pointer;
  font-size: 1.1rem;
  transition: color 0.3s ease;
}

.search-box button:hover {
  color: var(--accent-color);
}

/* 响应式菜单按钮 */
.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 英雄区域 */
.hero {
  background: linear-gradient(135deg, rgba(0, 78, 137, 0.8) 0%, rgba(255, 107, 53, 0.8) 100%), 
              url('https://d2xsxph8kpxj0f.cloudfront.net/310519663673158331/NYsPcyhkEGq4Y4BT7Xhbuw/hero-banner-NHcLu2VA2t8fYgxMfEKeTg.webp') center/cover;
  background-attachment: fixed;
  color: white;
  padding: 120px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="white" opacity="0.1"/><circle cx="80" cy="80" r="2" fill="white" opacity="0.1"/></svg>');
  animation: float 20s infinite linear;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(20px); }
  100% { transform: translateY(0px); }
}

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

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 20px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  letter-spacing: 2px;
}

.hero p {
  font-size: 1.3rem;
  margin-bottom: 30px;
  opacity: 0.95;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.cta-button {
  display: inline-block;
  background: var(--accent-color);
  color: var(--text-dark);
  padding: 14px 40px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 2px solid var(--accent-color);
  cursor: pointer;
  font-size: 1rem;
  margin: 10px;
}

.cta-button:hover {
  background: transparent;
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(247, 184, 1, 0.3);
}

.cta-button.secondary {
  background: transparent;
  color: white;
  border-color: white;
}

.cta-button.secondary:hover {
  background: white;
  color: var(--secondary-color);
}

/* 分区标题 */
.section-title {
  text-align: center;
  margin: 60px 0 40px;
  position: relative;
  padding-bottom: 20px;
}

.section-title h2 {
  font-size: 2.5rem;
  color: var(--secondary-color);
  margin-bottom: 10px;
  font-weight: 700;
}

.section-title p {
  color: var(--text-light);
  font-size: 1.1rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: 2px;
}

/* 视频卡片 */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 25px;
  margin: 40px 0;
}

.video-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
}

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

.video-thumbnail {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  overflow: hidden;
}

.video-thumbnail img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.video-card:hover .video-thumbnail img {
  transform: scale(1.05);
}

.play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(255, 107, 53, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 10;
}

.play-button::after {
  content: '▶';
  color: white;
  font-size: 1.5rem;
  margin-left: 4px;
}

.video-card:hover .play-button {
  opacity: 1;
}

.video-info {
  padding: 15px;
}

.video-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}

.video-stats {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: 10px;
}

.video-stat {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 专家展示 */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.expert-card {
  background: white;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  text-align: center;
}

.expert-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}

.expert-avatar {
  width: 100%;
  height: 250px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: white;
  overflow: hidden;
}

.expert-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.expert-info {
  padding: 20px;
}

.expert-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 5px;
}

.expert-title {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 10px;
}

.expert-desc {
  color: var(--text-light);
  font-size: 0.95rem;
  margin-bottom: 15px;
  line-height: 1.5;
}

.expert-links {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.expert-links a {
  display: inline-block;
  padding: 8px 15px;
  background: var(--bg-light);
  color: var(--secondary-color);
  text-decoration: none;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.expert-links a:hover {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* FAQ 部分 */
.faq-container {
  max-width: 800px;
  margin: 40px auto;
}

.faq-item {
  background: white;
  border-left: 4px solid var(--primary-color);
  margin-bottom: 15px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

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

.faq-question {
  padding: 20px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--secondary-color);
  user-select: none;
}

.faq-question:hover {
  background: var(--bg-light);
}

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

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

.faq-answer {
  padding: 0 20px 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
  color: var(--text-light);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  padding: 0 20px 20px 20px;
  max-height: 500px;
}

/* 用户评论 */
.reviews-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 25px;
  margin: 40px 0;
}

.review-card {
  background: white;
  padding: 25px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  border-top: 4px solid var(--accent-color);
}

.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.review-stars {
  color: var(--accent-color);
  font-size: 1.1rem;
  margin-bottom: 10px;
}

.review-text {
  color: var(--text-light);
  margin-bottom: 15px;
  line-height: 1.6;
  font-style: italic;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
}

.review-author-info h4 {
  color: var(--text-dark);
  font-size: 0.95rem;
  margin: 0;
}

.review-author-info p {
  color: var(--text-light);
  font-size: 0.85rem;
  margin: 0;
}

/* 品牌合作 */
.brands-container {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 40px;
  margin: 40px 0;
  padding: 30px;
  background: var(--bg-light);
  border-radius: 12px;
}

.brand-logo {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.7;
  transition: opacity 0.3s ease;
  font-weight: 700;
  color: var(--secondary-color);
}

.brand-logo:hover {
  opacity: 1;
}

/* 社区入口 */
.community-section {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #003d6b 100%);
  color: white;
  padding: 60px 20px;
  text-align: center;
  border-radius: 12px;
  margin: 40px 0;
}

.community-section h3 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.community-item {
  background: rgba(255, 255, 255, 0.1);
  padding: 20px;
  border-radius: 10px;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.community-item:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-5px);
}

.community-item h4 {
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.community-item p {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* 联系我们 */
.contact-section {
  background: white;
  padding: 60px 20px;
  margin: 40px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.contact-item {
  background: var(--bg-light);
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  transition: all 0.3s ease;
}

.contact-item:hover {
  background: white;
  box-shadow: var(--shadow-hover);
  transform: translateY(-5px);
}

.contact-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
  color: var(--primary-color);
}

.contact-item h4 {
  color: var(--secondary-color);
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.contact-item p {
  color: var(--text-light);
  margin: 5px 0;
}

.contact-item a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.contact-item a:hover {
  color: var(--secondary-color);
}

/* 页脚 */
footer {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #003d6b 100%);
  color: white;
  padding: 50px 20px 30px;
  margin-top: 60px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-section h4 {
  font-size: 1.1rem;
  margin-bottom: 15px;
  color: var(--accent-color);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 10px;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 20px;
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
}

.footer-bottom p {
  margin: 5px 0;
  font-size: 0.9rem;
}

.qr-code-section {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin: 20px 0;
  flex-wrap: wrap;
}

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

.qr-item p {
  margin-top: 10px;
  font-size: 0.9rem;
}

/* 社交分享 */
.social-share {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin: 20px 0;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 1.1rem;
}

.share-btn:hover {
  background: var(--accent-color);
  color: var(--secondary-color);
  transform: translateY(-3px);
  border-color: var(--accent-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1.1rem;
  }

  .section-title h2 {
    font-size: 1.8rem;
  }

  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
  }

  .expert-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 15px;
  }

  nav ul {
    gap: 1rem;
  }

  .search-box {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .header-container {
    flex-wrap: wrap;
  }

  .hero {
    padding: 80px 20px;
  }

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

  .brands-container {
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .section-title h2 {
    font-size: 1.5rem;
  }

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

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

  nav ul {
    gap: 0.5rem;
  }

  .logo {
    font-size: 1.3rem;
  }

  .cta-button {
    padding: 12px 25px;
    font-size: 0.9rem;
  }
}

/* 加载动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* 平滑滚动 */
.smooth-scroll {
  scroll-behavior: smooth;
}

/* 无障碍 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* 站点Logo图标 */
.site-logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(0,0,0,0.18);
}