/* 蜜芽 原创游戏视频社区 - 全站样式表 */
/* 设计理念：高端游戏社区，融合电竞美学与温暖社区氛围 */

:root {
  --primary-color: #ff6b6b;
  --secondary-color: #7c3aed;
  --accent-gold: #ffd700;
  --dark-bg: #0f1419;
  --card-bg: #1a1f2e;
  --border-color: #2a3f5f;
  --text-primary: #ffffff;
  --text-secondary: #b0b8c1;
  --success-color: #00d9ff;
  --warning-color: #ff9500;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--dark-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ========== 导航栏 ========== */
header {
  background: linear-gradient(135deg, rgba(15, 20, 25, 0.95) 0%, rgba(26, 31, 46, 0.95) 100%);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 20px;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

.brand-name {
  font-size: 18px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-color), var(--accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.5px;
}

nav {
  display: flex;
  gap: 30px;
  align-items: center;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
  padding: 5px 0;
}

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

nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  transition: width 0.3s ease;
}

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

/* 搜索框 */
.search-container {
  position: relative;
  width: 250px;
}

.search-box {
  width: 100%;
  padding: 8px 15px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-primary);
  font-size: 13px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.search-box:hover,
.search-box:focus {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary-color);
  outline: none;
}

.search-icon {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  pointer-events: none;
}

/* ========== 主容器 ========== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== Hero Banner ========== */
.hero-section {
  position: relative;
  height: 500px;
  background: linear-gradient(135deg, rgba(45, 27, 78, 0.9), rgba(26, 58, 82, 0.9)), 
              url('https://d2xsxph8kpxj0f.cloudfront.net/310519663673158331/4k3v6LpzPc6eGYqyEkJPbY/tangxin_hero_banner-52HcWKebYipPw76rPaBrDW.webp');
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-content {
  text-align: center;
  z-index: 2;
  animation: fadeInUp 0.8s ease-out;
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 15px;
  background: linear-gradient(135deg, #ff6b6b, #ffd700, #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px rgba(255, 107, 107, 0.3);
  letter-spacing: 1px;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 30px;
  font-weight: 300;
  letter-spacing: 0.5px;
}

.hero-cta {
  display: inline-flex;
  gap: 15px;
}

.btn {
  padding: 12px 30px;
  border: none;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), #ff8787);
  color: white;
  box-shadow: 0 4px 20px rgba(255, 107, 107, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(255, 107, 107, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
  background: rgba(255, 107, 107, 0.1);
  transform: translateY(-2px);
}

/* ========== 视频卡片 ========== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.video-card {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
  cursor: pointer;
  position: relative;
  group: 'video-card';
}

.video-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary-color);
  box-shadow: 0 10px 40px rgba(255, 107, 107, 0.2);
}

.video-thumbnail {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  background: linear-gradient(135deg, rgba(45, 27, 78, 0.8), rgba(26, 58, 82, 0.8));
  overflow: hidden;
}

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

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

.play-button {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60px;
  height: 60px;
  background: rgba(255, 107, 107, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 10;
  box-shadow: 0 4px 20px rgba(255, 107, 107, 0.3);
}

.video-card:hover .play-button {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.1);
}

.video-info {
  padding: 15px;
}

.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-secondary);
}

.video-stats {
  display: flex;
  gap: 10px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 8px;
}

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

/* ========== 分类模块 ========== */
.section {
  margin: 60px 0;
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
}

.section:first-of-type {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 30px;
  color: var(--text-primary);
  position: relative;
  padding-left: 15px;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 30px;
  background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
  border-radius: 2px;
}

.section-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-weight: 500;
}

/* ========== 专家展示 ========== */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.expert-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.expert-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: 0 8px 30px rgba(255, 107, 107, 0.15);
}

.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  margin: 0 auto 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: bold;
  color: white;
}

.expert-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 5px;
  color: var(--text-primary);
}

.expert-role {
  font-size: 12px;
  color: var(--primary-color);
  margin-bottom: 10px;
  font-weight: 500;
}

.expert-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 15px;
  line-height: 1.5;
}

.expert-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.expert-actions a {
  font-size: 11px;
  padding: 6px 12px;
  background: rgba(255, 107, 107, 0.1);
  color: var(--primary-color);
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

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

/* ========== FAQ ========== */
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 15px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-question {
  padding: 18px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.faq-item:hover .faq-question {
  background: rgba(255, 107, 107, 0.05);
  color: var(--primary-color);
}

.faq-toggle {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
  color: var(--primary-color);
  font-size: 18px;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  padding: 0 18px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 18px 18px;
}

/* ========== 用户评论 ========== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 20px;
  transition: all 0.3s ease;
}

.review-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 6px 25px rgba(255, 107, 107, 0.1);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.review-avatar {
  width: 45px;
  height: 45px;
  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: bold;
  font-size: 18px;
}

.review-user {
  flex: 1;
}

.review-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.review-date {
  font-size: 12px;
  color: var(--text-secondary);
}

.review-rating {
  color: var(--accent-gold);
  font-size: 14px;
  margin-bottom: 10px;
}

.review-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========== 页脚 ========== */
footer {
  background: linear-gradient(135deg, rgba(15, 20, 25, 0.98) 0%, rgba(26, 31, 46, 0.98) 100%);
  border-top: 1px solid var(--border-color);
  margin-top: 80px;
  padding: 50px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

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

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

.footer-section ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  transition: all 0.3s ease;
}

.footer-section ul li a:hover {
  color: var(--primary-color);
  padding-left: 5px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 13px;
}

.footer-contact p {
  color: var(--text-secondary);
}

.footer-contact strong {
  color: var(--text-primary);
}

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

.qrcode-item {
  margin-bottom: 20px;
}

.qrcode-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  display: block;
}

.qrcode-img {
  width: 100px;
  height: 100px;
  background: white;
  border-radius: 8px;
  padding: 5px;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 12px;
}

.footer-bottom p {
  margin: 5px 0;
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
  .header-container {
    height: 60px;
  }

  .brand-name {
    font-size: 16px;
  }

  nav {
    gap: 15px;
    font-size: 12px;
  }

  .search-container {
    width: 150px;
  }

  .hero-section {
    height: 350px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-cta {
    flex-direction: column;
    gap: 10px;
  }

  .btn {
    width: 100%;
  }

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

  .section-title {
    font-size: 24px;
  }

  .experts-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }

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

  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 480px) {
  .header-container {
    padding: 0 10px;
  }

  nav {
    display: none;
  }

  .hero-title {
    font-size: 24px;
  }

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

  .section-title {
    font-size: 20px;
  }

  .btn {
    padding: 10px 20px;
    font-size: 12px;
  }
}

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

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

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

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

/* ========== 工具类 ========== */
.text-center {
  text-align: center;
}

.mt-20 {
  margin-top: 20px;
}

.mt-40 {
  margin-top: 40px;
}

.mb-20 {
  margin-bottom: 20px;
}

.mb-40 {
  margin-bottom: 40px;
}

.hidden {
  display: none;
}

.lazy-load {
  background: linear-gradient(90deg, var(--card-bg) 25%, rgba(255, 255, 255, 0.1) 50%, var(--card-bg) 75%);
  background-size: 200% 100%;
  animation: pulse 1.5s infinite;
}