/* 蘑菇视频 - 主样式文件 */
:root {
  --primary: #7c3aed;
  --primary-dark: #5b21b6;
  --primary-light: #ede9fe;
  --secondary: #10b981;
  --secondary-dark: #059669;
  --accent: #f59e0b;
  --text-dark: #1f2937;
  --text-gray: #6b7280;
  --text-light: #9ca3af;
  --bg-white: #ffffff;
  --bg-gray: #f9fafb;
  --bg-dark: #111827;
  --border: #e5e7eb;
  --shadow: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -2px rgba(0,0,0,.05);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  color: var(--text-dark);
  background: var(--bg-white);
  line-height: 1.6;
  font-size: 15px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 70px 0; }
.section-gray { background: var(--bg-gray); }

/* ===== 顶部公告栏 ===== */
.top-bar {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  color: #fff;
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
}
.top-bar a { color: #fff; text-decoration: underline; }

/* ===== 导航 ===== */
.site-header {
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
  position: sticky;
  top: 0;
  z-index: 1000;
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}
.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
}
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-dark);
  transition: all .2s;
}
.main-nav a:hover, .main-nav a.active {
  background: var(--primary-light);
  color: var(--primary);
}
.nav-btn {
  background: var(--primary);
  color: #fff !important;
  padding: 8px 20px !important;
  border-radius: 20px !important;
  font-weight: 600;
}
.nav-btn:hover { background: var(--primary-dark) !important; color: #fff !important; }
.hamburger { display: none; cursor: pointer; flex-direction: column; gap: 5px; }
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: .3s; }

/* ===== 搜索框 ===== */
.search-bar {
  background: var(--bg-gray);
  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: 30px;
  overflow: hidden;
  transition: border-color .2s;
}
.search-inner:focus-within { border-color: var(--primary); }
.search-inner input {
  flex: 1;
  border: none;
  outline: none;
  padding: 10px 20px;
  font-size: 14px;
  background: transparent;
  font-family: inherit;
}
.search-inner button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 24px;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: background .2s;
}
.search-inner button:hover { background: var(--primary-dark); }

/* ===== Hero Banner ===== */
.hero {
  background: linear-gradient(135deg, #1e0a3c 0%, #3b0764 40%, #065f46 100%);
  color: #fff;
  padding: 80px 0 60px;
  overflow: hidden;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,.3) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 13px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero h1 span { color: #a78bfa; }
.hero p {
  font-size: 16px;
  color: rgba(255,255,255,.8);
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  transition: all .2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(124,58,237,.4); }
.btn-outline {
  background: transparent;
  color: #fff;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,.4);
  transition: all .2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-outline:hover { background: rgba(255,255,255,.1); border-color: #fff; }
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 40px;
}
.stat-item { text-align: center; }
.stat-num { font-size: 28px; font-weight: 800; color: #a78bfa; }
.stat-label { font-size: 12px; color: rgba(255,255,255,.6); margin-top: 2px; }
.hero-img { position: relative; }
.hero-img img {
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
}

/* ===== 标题组件 ===== */
.section-head { text-align: center; margin-bottom: 50px; }
.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 12px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-gray);
  max-width: 600px;
  margin: 0 auto;
}
.tag-line {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
  letter-spacing: .5px;
}

/* ===== 功能卡片 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  transition: all .3s;
}
.feature-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
}
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-gray); line-height: 1.7; }

/* ===== 视频卡片 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.video-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all .3s;
  cursor: pointer;
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #000;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,.3);
  opacity: 0;
  transition: opacity .3s;
}
.video-card:hover .play-btn { opacity: 1; }
.play-btn-circle {
  width: 52px;
  height: 52px;
  background: rgba(255,255,255,.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
  transform: scale(.8);
  transition: transform .3s;
}
.video-card:hover .play-btn-circle { transform: scale(1); }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,.7);
  color: #fff;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
}
.video-info { padding: 14px; }
.video-info h4 { font-size: 14px; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.video-meta { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--text-light); }
.video-meta span { display: flex; align-items: center; gap: 3px; }

/* ===== 场景区 ===== */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scene-card {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  aspect-ratio: 4/3;
  cursor: pointer;
}
.scene-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s;
}
.scene-card:hover img { transform: scale(1.08); }
.scene-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.7) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 20px;
}
.scene-overlay h3 { color: #fff; font-size: 18px; font-weight: 700; }
.scene-overlay p { color: rgba(255,255,255,.8); font-size: 13px; margin-top: 4px; }

/* ===== 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: 36px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  z-index: 0;
}
.step-card {
  text-align: center;
  position: relative;
  z-index: 1;
}
.step-num {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 24px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 4px 14px rgba(124,58,237,.4);
}
.step-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.step-card p { font-size: 13px; color: var(--text-gray); }

/* ===== 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-date {
  min-width: 100px;
  font-size: 13px;
  color: var(--text-gray);
  padding-top: 3px;
}
.changelog-tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 8px;
}
.tag-new { background: #dcfce7; color: #166534; }
.tag-fix { background: #fef3c7; color: #92400e; }
.tag-improve { background: #dbeafe; color: #1e40af; }
.changelog-title { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.changelog-desc { font-size: 14px; color: var(--text-gray); }

/* ===== 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;
}
.faq-q {
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background .2s;
  user-select: none;
}
.faq-q:hover { background: var(--bg-gray); }
.faq-q.active { background: var(--primary-light); color: var(--primary); }
.faq-icon { font-size: 18px; transition: transform .3s; }
.faq-q.active .faq-icon { transform: rotate(45deg); }
.faq-a {
  display: none;
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.8;
}
.faq-a.open { display: block; }

/* ===== 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: box-shadow .3s;
}
.review-card:hover { box-shadow: var(--shadow-lg); }
.review-stars { color: #f59e0b; font-size: 16px; margin-bottom: 12px; }
.review-text { font-size: 14px; color: var(--text-gray); line-height: 1.7; margin-bottom: 16px; }
.reviewer { display: flex; align-items: center; gap: 10px; }
.reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
}
.reviewer-name { font-size: 14px; font-weight: 600; }
.reviewer-info { font-size: 12px; color: var(--text-light); }

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.contact-info h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; }
.contact-info p { font-size: 15px; color: var(--text-gray); margin-bottom: 32px; line-height: 1.8; }
.contact-items { display: flex; flex-direction: column; gap: 16px; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: var(--bg-gray);
  border-radius: var(--radius-sm);
}
.contact-item-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.contact-item-text strong { display: block; font-size: 14px; margin-bottom: 2px; }
.contact-item-text span { font-size: 13px; color: var(--text-gray); }
.contact-form { background: var(--bg-gray); border-radius: var(--radius); padding: 36px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  transition: border-color .2s;
  outline: none;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary); }
.form-group textarea { resize: vertical; min-height: 100px; }
.btn-submit {
  width: 100%;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 13px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background .2s;
}
.btn-submit:hover { background: var(--primary-dark); }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,.7);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand .logo { color: #fff; margin-bottom: 16px; }
.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 { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { font-size: 14px; transition: color .2s; }
.footer-col ul a:hover { color: #fff; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}
.footer-bottom a { color: rgba(255,255,255,.5); margin-left: 16px; }
.footer-bottom a:hover { color: #fff; }

/* ===== 面包屑 ===== */
.breadcrumb {
  background: var(--bg-gray);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-gray);
}
.breadcrumb ol li::after { content: '/'; margin-left: 8px; }
.breadcrumb ol li:last-child::after { content: ''; }
.breadcrumb ol a { color: var(--primary); }

/* ===== 内页通用 ===== */
.page-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.page-hero h1 { font-size: 36px; font-weight: 800; margin-bottom: 12px; }
.page-hero p { font-size: 16px; opacity: .85; }

.inner-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 40px;
  align-items: start;
}
.sidebar {
  background: var(--bg-gray);
  border-radius: var(--radius);
  padding: 24px;
  position: sticky;
  top: 90px;
}
.sidebar h3 { font-size: 15px; font-weight: 700; margin-bottom: 14px; color: var(--text-dark); }
.sidebar ul { display: flex; flex-direction: column; gap: 4px; }
.sidebar ul a {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-gray);
  transition: all .2s;
}
.sidebar ul a:hover, .sidebar ul a.active {
  background: var(--primary-light);
  color: var(--primary);
}

/* ===== 下载按钮 ===== */
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--primary);
  color: #fff;
  padding: 14px 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  transition: all .2s;
}
.download-btn:hover { background: var(--primary-dark); transform: translateY(-2px); }
.download-btn.ios { background: #000; }
.download-btn.ios:hover { background: #333; }
.download-btn.android { background: #3ddc84; color: #000; }
.download-btn.android:hover { background: #2bb56e; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .tutorial-steps { grid-template-columns: repeat(2, 1fr); }
  .tutorial-steps::before { display: none; }
}
@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-img { display: none; }
  .hero h1 { font-size: 28px; }
  .scene-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .inner-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .main-nav { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: #fff; padding: 16px; box-shadow: var(--shadow-lg); }
  .main-nav.open { display: flex; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
  .section { padding: 50px 0; }
  .section-head h2 { font-size: 24px; }
}
@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .scene-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .tutorial-steps { grid-template-columns: 1fr; }
  .hero-stats { gap: 16px; }
}