/* 蘑菇视频 - 主样式表 */
/* 全局重置与基础样式 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #e8621a;
  --primary-dark: #c44d0e;
  --secondary: #4a7c3f;
  --secondary-dark: #365c2e;
  --accent: #f5a623;
  --bg: #fff;
  --bg-light: #fdf8f3;
  --bg-section: #f7f3ee;
  --text: #2d2d2d;
  --text-light: #666;
  --text-muted: #999;
  --border: #e8e0d6;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 32px rgba(232,98,26,0.18);
  --transition: 0.25s ease;
  --font: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 15px;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* 容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 72px 0; }
.section-alt { background: var(--bg-section); }

/* 标题 */
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  margin-bottom: 12px;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 48px;
}
.section-title span { color: var(--primary); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-secondary:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-white {
  background: #fff;
  color: var(--primary);
}
.btn-white:hover {
  background: var(--bg-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

/* 顶部导航 */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  flex-shrink: 0;
}
.logo img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
}
.logo span { color: var(--text); }

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
}
.nav a:hover, .nav a.active {
  color: var(--primary);
  background: rgba(232,98,26,0.08);
}

/* 搜索框 */
.search-bar {
  background: var(--bg-section);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.search-inner {
  display: flex;
  align-items: center;
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 50px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-inner:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232,98,26,0.12);
}
.search-inner input {
  flex: 1;
  border: none;
  outline: none;
  padding: 10px 20px;
  font-size: 14px;
  font-family: var(--font);
  background: transparent;
  color: var(--text);
}
.search-inner input::placeholder { color: var(--text-muted); }
.search-btn {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 22px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font);
  transition: background var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}
.search-btn:hover { background: var(--primary-dark); }

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* Banner区域 */
.banner {
  background: linear-gradient(135deg, #fff8f3 0%, #fef3e8 50%, #f0f8ed 100%);
  padding: 80px 0 60px;
  overflow: hidden;
  position: relative;
}
.banner::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(232,98,26,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.banner-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.banner-content { position: relative; z-index: 1; }
.banner-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232,98,26,0.1);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.banner h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 18px;
}
.banner h1 em {
  color: var(--primary);
  font-style: normal;
}
.banner-desc {
  font-size: 1.05rem;
  color: var(--text-light);
  margin-bottom: 32px;
  line-height: 1.8;
}
.banner-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.banner-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  display: block;
}
.stat-label {
  font-size: 12px;
  color: var(--text-muted);
}
.banner-image {
  position: relative;
}
.banner-image img {
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0,0,0,0.12);
  width: 100%;
}

/* 功能模块 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}
.feature-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(232,98,26,0.1), rgba(74,124,63,0.1));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 28px;
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}
.feature-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* 视频卡片 */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.video-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: #f0ebe4;
}
.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;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 56px;
  height: 56px;
  background: rgba(232,98,26,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
}
.play-btn::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-card:hover .play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0,0,0,0.72);
  color: #fff;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info {
  padding: 16px;
}
.video-info h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-info p {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  gap: 14px;
  font-size: 12px;
  color: var(--text-muted);
}
.video-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* 场景模块 */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scenario-card {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  aspect-ratio: 4/3;
  cursor: pointer;
}
.scenario-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.scenario-card:hover img { transform: scale(1.06); }
.scenario-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.72));
  padding: 24px 20px 20px;
  color: #fff;
}
.scenario-overlay h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.scenario-overlay p { font-size: 13px; opacity: 0.85; }

/* 教程步骤 */
.tutorial-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.tutorial-steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  z-index: 0;
}
.step-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border);
  position: relative;
  z-index: 1;
  transition: all var(--transition);
}
.step-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.step-num {
  width: 56px;
  height: 56px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  margin: 0 auto 18px;
  border: 4px solid #fff;
  box-shadow: 0 4px 16px rgba(232,98,26,0.3);
}
.step-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.step-card p { font-size: 13px; color: var(--text-light); }

/* 更新日志 */
.changelog-list {
  max-width: 800px;
  margin: 0 auto;
}
.changelog-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}
.changelog-item:last-child { border-bottom: none; }
.changelog-version {
  flex-shrink: 0;
  width: 90px;
}
.version-badge {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 700;
}
.changelog-date {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}
.changelog-content h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.changelog-content p { font-size: 14px; color: var(--text-light); }

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item.active { border-color: var(--primary); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  background: #fff;
  transition: background var(--transition);
  user-select: none;
}
.faq-item.active .faq-question { background: rgba(232,98,26,0.05); color: var(--primary); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-section);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
  transition: all var(--transition);
  color: var(--text-light);
}
.faq-item.active .faq-icon {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 22px 18px;
}

/* 用户评价 */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.review-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all var(--transition);
}
.review-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  flex-shrink: 0;
}
.review-user { font-weight: 700; font-size: 14px; }
.review-stars { color: var(--accent); font-size: 13px; }
.review-text { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* 联系我们 */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.contact-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}
.contact-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.contact-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}
.contact-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.contact-card p { font-size: 14px; color: var(--text-light); }

/* 页脚 */
.footer {
  background: #1a1a1a;
  color: #ccc;
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid #333;
}
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.footer-brand .logo span { color: #ccc; }
.footer-brand p { font-size: 14px; line-height: 1.8; }
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  color: #999;
  font-size: 14px;
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--primary); }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: #666;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom a { color: #888; }
.footer-bottom a:hover { color: var(--primary); }

/* 面包屑 */
.breadcrumb {
  background: var(--bg-section);
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.breadcrumb-list a { color: var(--text-light); }
.breadcrumb-list a:hover { color: var(--primary); }
.breadcrumb-list .sep { color: var(--border); }

/* 内页 Hero */
.page-hero {
  background: linear-gradient(135deg, #fff8f3, #fef3e8);
  padding: 56px 0;
  text-align: center;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 { font-size: 2rem; font-weight: 800; margin-bottom: 12px; }
.page-hero p { font-size: 1rem; color: var(--text-light); max-width: 600px; margin: 0 auto; }

/* 通用卡片 */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
}
.card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
}

/* 标签 */
.tag {
  display: inline-block;
  background: rgba(232,98,26,0.1);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
}

/* 响应式 */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .tutorial-steps { grid-template-columns: repeat(2, 1fr); }
  .tutorial-steps::before { display: none; }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .banner-inner { grid-template-columns: 1fr; }
  .banner-image { display: none; }
  .banner h1 { font-size: 1.9rem; }
  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 12px 20px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  }
  .hamburger { display: flex; }
  .scenarios-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .banner-stats { gap: 20px; }
  .section { padding: 48px 0; }
  .section-title { font-size: 1.6rem; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .tutorial-steps { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .banner h1 { font-size: 1.6rem; }
  .banner-actions { flex-direction: column; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* 动画 */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.6s ease both; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

/* 滚动条 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-section); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }