/* 蘑菇视频 - 主样式文件 */
:root {
  --primary: #3a8a3e;
  --primary-dark: #2d6e31;
  --accent: #f5820d;
  --accent-dark: #d4700a;
  --bg: #f7f8fa;
  --card-bg: #ffffff;
  --text: #222;
  --text-muted: #666;
  --border: #e5e7eb;
  --radius: 10px;
  --shadow: 0 2px 16px rgba(0,0,0,0.08);
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
}

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

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

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

/* ===== HEADER ===== */
.site-header {
  background: #fff;
  border-bottom: 2px solid var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-wrap img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: cover;
}

.logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
}

.logo-text span { color: var(--accent); }

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

.site-nav a {
  padding: 6px 14px;
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
}

.site-nav a:hover, .site-nav a.active {
  background: var(--primary);
  color: #fff;
}

.nav-toggle { display: none; font-size: 24px; cursor: pointer; color: var(--primary); }

/* ===== SEARCH BAR ===== */
.search-bar-wrap {
  background: var(--primary);
  padding: 10px 20px;
}

.search-bar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-bar-inner form {
  display: flex;
  flex: 1;
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.search-bar-inner input {
  flex: 1;
  border: none;
  outline: none;
  padding: 9px 18px;
  font-size: 14px;
  background: transparent;
}

.search-bar-inner button {
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 9px 22px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.2s;
}

.search-bar-inner button:hover { background: var(--accent-dark); }

/* ===== HERO BANNER ===== */
.hero-section {
  position: relative;
  background: linear-gradient(135deg, #2d6e31 0%, #3a8a3e 50%, #f5820d 100%);
  color: #fff;
  padding: 60px 20px;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 40px;
}

.hero-text { flex: 1; }

.hero-text h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.hero-text p {
  font-size: 17px;
  opacity: 0.92;
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

.btn-primary {
  background: var(--accent);
  color: #fff;
  padding: 12px 30px;
  border-radius: 28px;
  font-size: 16px;
  font-weight: 700;
  transition: background 0.2s, transform 0.15s;
  display: inline-block;
}

.btn-primary:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); }

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
  padding: 12px 30px;
  border-radius: 28px;
  font-size: 16px;
  font-weight: 700;
  transition: background 0.2s, transform 0.15s;
  display: inline-block;
}

.btn-outline:hover { background: rgba(255,255,255,0.15); color: #fff; transform: translateY(-2px); }

.hero-img { flex: 0 0 480px; border-radius: 16px; overflow: hidden; box-shadow: 0 8px 32px rgba(0,0,0,0.25); }

.hero-img img { width: 100%; height: 280px; object-fit: cover; }

.hero-stats {
  display: flex;
  gap: 30px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.stat-item { text-align: center; }
.stat-item .num { font-size: 28px; font-weight: 800; color: #fff; }
.stat-item .label { font-size: 13px; opacity: 0.85; }

/* ===== SECTION COMMON ===== */
.section { padding: 60px 0; }
.section-alt { background: #fff; }

.section-title {
  text-align: center;
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 10px;
}

.section-title span { color: var(--accent); }

.section-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 40px;
}

/* ===== FEATURES GRID ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  border-top: 3px solid var(--primary);
}

.feature-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }

.feature-card .icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 24px;
  color: #fff;
}

.feature-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--primary-dark); }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

.feature-card img { width: 100%; height: 160px; object-fit: cover; border-radius: 8px; margin-bottom: 14px; }

/* ===== VIDEO CARDS ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.video-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
}

.video-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.14); }

.video-thumb {
  position: relative;
  overflow: hidden;
}

.video-thumb img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform 0.3s;
}

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

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 52px;
  height: 52px;
  background: rgba(245, 130, 13, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none;
}

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

.play-btn::after {
  content: '';
  border-left: 18px solid #fff;
  border-top: 11px solid transparent;
  border-bottom: 11px solid transparent;
  margin-left: 4px;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 12px;
  padding: 2px 7px;
  border-radius: 4px;
}

.video-info { padding: 12px 14px 16px; }
.video-info h4 { font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 6px; line-height: 1.4; }
.video-meta { display: flex; gap: 10px; font-size: 12px; color: var(--text-muted); }
.video-meta span { display: flex; align-items: center; gap: 3px; }

/* ===== SCENARIOS ===== */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--accent);
  transition: transform 0.2s;
}

.scenario-card:hover { transform: translateX(4px); }
.scenario-card h3 { font-size: 16px; font-weight: 700; color: var(--primary-dark); margin-bottom: 8px; }
.scenario-card p { font-size: 14px; color: var(--text-muted); }

/* ===== TUTORIAL ===== */
.tutorial-list { display: flex; flex-direction: column; gap: 16px; }

.tutorial-item {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.tutorial-item:hover { transform: translateX(4px); }

.tutorial-num {
  flex: 0 0 44px;
  height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
}

.tutorial-body h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; color: var(--primary-dark); }
.tutorial-body p { font-size: 14px; color: var(--text-muted); }

/* ===== CHANGELOG ===== */
.changelog-list { display: flex; flex-direction: column; gap: 0; position: relative; }

.changelog-list::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}

.changelog-item {
  display: flex;
  gap: 20px;
  padding: 18px 0 18px 44px;
  position: relative;
}

.changelog-item::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 24px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--primary);
}

.changelog-version {
  flex: 0 0 70px;
  font-weight: 700;
  color: var(--primary);
  font-size: 14px;
}

.changelog-date { font-size: 13px; color: var(--text-muted); margin-bottom: 4px; }
.changelog-content { font-size: 14px; color: var(--text); }

/* ===== FAQ ===== */
.faq-list { display: flex; flex-direction: column; gap: 12px; }

.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-question {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--primary-dark);
  transition: background 0.2s;
}

.faq-question:hover { background: #f0f7f0; }

.faq-question::after {
  content: '+';
  font-size: 22px;
  color: var(--accent);
  font-weight: 400;
  transition: transform 0.3s;
}

.faq-item.open .faq-question::after { transform: rotate(45deg); }

.faq-answer {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.2s;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.open .faq-answer { max-height: 200px; padding: 0 20px 16px; }

/* ===== REVIEWS ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  position: relative;
}

.review-card::before {
  content: '"';
  font-size: 60px;
  color: var(--primary);
  opacity: 0.12;
  position: absolute;
  top: 10px;
  left: 16px;
  line-height: 1;
  font-family: Georgia, serif;
}

.review-stars { color: #f5820d; font-size: 16px; margin-bottom: 10px; }
.review-text { font-size: 14px; color: var(--text); line-height: 1.7; margin-bottom: 16px; }
.review-author { display: flex; align-items: center; gap: 10px; }

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 16px;
}

.review-name { font-weight: 600; font-size: 14px; }
.review-role { font-size: 12px; color: var(--text-muted); }

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.contact-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.contact-card:hover { transform: translateY(-3px); }
.contact-card .icon { font-size: 32px; margin-bottom: 12px; }
.contact-card h4 { font-size: 15px; font-weight: 700; color: var(--primary-dark); margin-bottom: 6px; }
.contact-card p { font-size: 14px; color: var(--text-muted); }

/* ===== FOOTER ===== */
.site-footer {
  background: #1a2e1b;
  color: #ccc;
  padding: 48px 0 0;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand .logo-wrap { margin-bottom: 14px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand p { font-size: 13px; color: #aaa; line-height: 1.7; }

.footer-col h5 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: #aaa; font-size: 13px; transition: color 0.2s; }
.footer-col ul li a:hover { color: var(--accent); }

.footer-bottom {
  border-top: 1px solid #2d4a2e;
  margin-top: 36px;
  padding: 18px 20px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: #888;
}

/* ===== BREADCRUMB ===== */
.breadcrumb {
  background: #fff;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
}

.breadcrumb .container { display: flex; gap: 6px; align-items: center; }
.breadcrumb a { color: var(--primary); }
.breadcrumb span { color: var(--text-muted); }

/* ===== INNER PAGE ===== */
.page-hero {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 40px 20px;
  text-align: center;
}

.page-hero h1 { font-size: 30px; font-weight: 800; margin-bottom: 8px; }
.page-hero p { font-size: 15px; opacity: 0.9; }

.inner-content { max-width: 900px; margin: 0 auto; padding: 40px 20px; }

/* ===== TAGS ===== */
.tag {
  display: inline-block;
  background: #e8f5e9;
  color: var(--primary);
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 12px;
  margin: 2px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .hero-inner { flex-direction: column; }
  .hero-img { flex: none; width: 100%; }
  .hero-text h1 { font-size: 26px; }
  .scenarios-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .site-nav { display: none; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: #fff; padding: 10px; box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
  .site-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 480px) {
  .features-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 16px; }
  .section-title { font-size: 22px; }
}