/* ============================================
   小马拉大车 - 原创样式表
   品牌：小马拉大车 | ilsjz56.cn
   定位：国内知名游戏解说公司+视频社区
   ============================================ */

/* === 基础重置与变量 === */
:root {
  --primary: #FF6B35;
  --secondary: #1A1A2E;
  --accent: #E94560;
  --bg-dark: #0F0F23;
  --bg-card: #16162A;
  --bg-card-hover: #1E1E3A;
  --text-light: #EAEAEA;
  --text-muted: #A0A0B8;
  --text-dim: #6B6B8D;
  --gradient-primary: linear-gradient(135deg, #FF6B35, #E94560);
  --gradient-dark: linear-gradient(180deg, #0F0F23, #1A1A2E);
  --shadow-card: 0 4px 20px rgba(0,0,0,0.3);
  --shadow-hover: 0 8px 32px rgba(255,107,53,0.2);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
  --max-width: 1280px;
}

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* === 头部导航 === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 15, 35, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,107,53,0.15);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 68px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-logo img {
  height: 42px;
  width: auto;
}

.site-logo span {
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.main-nav a {
  color: var(--text-light);
  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(255,107,53,0.1);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* === 搜索框 === */
.search-bar-wrap {
  background: var(--secondary);
  padding: 14px 0;
  margin-top: 68px;
  border-bottom: 1px solid rgba(255,107,53,0.1);
}

.search-bar {
  display: flex;
  max-width: 640px;
  margin: 0 auto;
  background: var(--bg-card);
  border-radius: 50px;
  overflow: hidden;
  border: 1px solid rgba(255,107,53,0.2);
}

.search-bar input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 12px 24px;
  color: var(--text-light);
  font-size: 0.95rem;
  outline: none;
}

.search-bar input::placeholder {
  color: var(--text-dim);
}

.search-bar button {
  background: var(--gradient-primary);
  border: none;
  padding: 12px 28px;
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 600;
}

.search-bar button:hover {
  opacity: 0.9;
}

/* === Banner区域 === */
.hero-banner {
  position: relative;
  height: 520px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-banner .hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.45);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 20px;
  max-width: 800px;
}

.hero-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero-content h1 .brand-highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  line-height: 1.8;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-primary);
  color: #fff;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255,107,53,0.4);
  color: #fff;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-light);
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  border: 2px solid rgba(255,107,53,0.5);
  cursor: pointer;
  transition: var(--transition);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(255,107,53,0.1);
  color: var(--primary);
}

/* === 通用区块 === */
.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-header h2 .hl {
  color: var(--primary);
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

.section-tag {
  display: inline-block;
  background: rgba(255,107,53,0.12);
  color: var(--primary);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

/* === 视频卡片网格 === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.05);
}

.video-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255,107,53,0.2);
}

.video-thumb {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
  cursor: pointer;
}

.video-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.play-btn-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.video-thumb:hover .play-btn-overlay {
  opacity: 1;
}

.play-btn-circle {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(255,107,53,0.5);
  transition: transform 0.3s ease;
}

.play-btn-circle:hover {
  transform: scale(1.1);
}

.play-btn-circle svg {
  width: 24px;
  height: 24px;
  fill: #fff;
  margin-left: 3px;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.8);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 600;
}

.video-info {
  padding: 16px;
}

.video-info h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text-dim);
  font-size: 0.82rem;
}

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

.video-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.video-tags .tag {
  background: rgba(255,107,53,0.1);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 50px;
  font-size: 0.75rem;
}

/* === 特色模块网格 === */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.05);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255,107,53,0.2);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* === 专家展示 === */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.05);
}

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

.expert-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid var(--primary);
}

.expert-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.expert-role {
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.expert-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

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

.btn-sm {
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-sm-primary {
  background: var(--gradient-primary);
  color: #fff;
  border: none;
}

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

.btn-sm:hover {
  transform: translateY(-1px);
}

/* === 用户评价 === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid rgba(255,255,255,0.05);
  transition: var(--transition);
}

.review-card:hover {
  border-color: rgba(255,107,53,0.2);
}

.review-stars {
  color: #FFB800;
  font-size: 0.9rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-card blockquote {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 16px;
  font-style: italic;
  border-left: 3px solid var(--primary);
  padding-left: 14px;
}

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

.review-author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
}

.review-author-info strong {
  display: block;
  font-size: 0.9rem;
}

.review-author-info span {
  color: var(--text-dim);
  font-size: 0.8rem;
}

/* === FAQ === */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  margin-bottom: 12px;
  border: 1px solid rgba(255,255,255,0.05);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-light);
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary);
}

.faq-question .faq-icon {
  font-size: 1.3rem;
  transition: transform 0.3s ease;
  color: var(--primary);
}

.faq-item.active .faq-question .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

/* === 合作品牌墙 === */
.brand-wall {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  align-items: center;
}

.brand-wall-item {
  background: var(--bg-card);
  padding: 20px 32px;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 1.1rem;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.05);
  transition: var(--transition);
}

.brand-wall-item:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* === 社区模块 === */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.community-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.05);
}

.community-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.community-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.community-card-body {
  padding: 16px;
}

.community-card-body h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.community-card-body p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* === 底部 === */
.site-footer {
  background: #0A0A1A;
  border-top: 1px solid rgba(255,107,53,0.1);
  padding: 48px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--primary);
}

.footer-col p,
.footer-col a {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 2;
  display: block;
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-logo img {
  height: 36px;
  margin-bottom: 12px;
}

.footer-qr-wrap {
  display: flex;
  gap: 20px;
  margin-top: 12px;
}

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

.footer-qr img {
  width: 100px;
  height: 100px;
  border-radius: 8px;
  margin-bottom: 6px;
}

.footer-qr span {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 20px 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.82rem;
}

.footer-bottom a {
  color: var(--text-dim);
}

.footer-bottom a:hover {
  color: var(--primary);
}

/* === 社交分享 === */
.share-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.share-btn:hover {
  transform: translateY(-2px);
  opacity: 0.9;
  color: #fff;
}

.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #161823; border: 1px solid #333; }
.share-bilibili { background: #00A1D6; }

/* === 面包屑 === */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.breadcrumb a {
  color: var(--text-muted);
}

.breadcrumb span {
  margin: 0 8px;
  color: var(--text-dim);
}

/* === 内页Banner === */
.page-banner {
  position: relative;
  height: 320px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 68px;
}

.page-banner img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.4);
}

.page-banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.page-banner-content h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-banner-content p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* === How-To指南 === */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
  counter-reset: step;
}

.howto-step {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  counter-increment: step;
  position: relative;
  border: 1px solid rgba(255,255,255,0.05);
}

.howto-step::before {
  content: "0" counter(step);
  display: block;
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.howto-step h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.howto-step p {
  color: var(--text-muted);
  font-size: 0.88rem;
}

/* === 联系信息 === */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.contact-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid rgba(255,255,255,0.05);
}

.contact-card h3 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--primary);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.contact-item .ci-label {
  color: var(--text-light);
  font-weight: 600;
  min-width: 70px;
}

/* === MCP前端代码区 === */
.mcp-section {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 32px;
  border: 1px solid rgba(255,107,53,0.15);
}

.mcp-section h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  color: var(--primary);
}

.mcp-terminal {
  background: #0D0D1A;
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: "Fira Code", "Consolas", monospace;
  font-size: 0.82rem;
  color: #4ADE80;
  line-height: 1.8;
  overflow-x: auto;
}

.mcp-terminal .mcp-line {
  margin-bottom: 4px;
}

.mcp-terminal .mcp-prompt {
  color: var(--primary);
}

.mcp-terminal .mcp-cmd {
  color: #60A5FA;
}

/* === 响应式 === */
@media (max-width: 1024px) {
  .hero-content h1 {
    font-size: 2.2rem;
  }
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(15, 15, 35, 0.98);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid rgba(255,107,53,0.15);
  }

  .main-nav.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  .hero-banner {
    height: 400px;
  }

  .hero-content h1 {
    font-size: 1.8rem;
  }

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

  .section {
    padding: 48px 0;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

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

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

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

  .page-banner {
    height: 240px;
  }

  .page-banner-content h1 {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.5rem;
  }

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

  .hero-btns {
    flex-direction: column;
    align-items: center;
  }

  .footer-qr-wrap {
    flex-direction: column;
    align-items: center;
  }
}

/* === 懒加载 === */
img[loading="lazy"] {
  opacity: 1;
  transition: opacity 0.5s ease;
}

img[loading="lazy"].loaded,
img.loaded {
  opacity: 1;
}

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

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* === 内页内容区 === */
.page-content {
  padding: 48px 0 72px;
}

.page-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 20px;
  margin-top: 40px;
}

.page-content h2:first-child {
  margin-top: 0;
}

.page-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-content ul {
  list-style: none;
  margin-bottom: 20px;
}

.page-content ul li {
  color: var(--text-muted);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
  font-size: 0.92rem;
}

.page-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
}