:root {
  --color-black: #000000;
  --color-white: #ffffff;
  --color-red: #d8232a;
  --color-whatsapp: #25d366;
  --color-blue-email: #0078d4;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-soft: 0 8px 30px rgba(0,0,0,0.07);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
  --transition-base: all 300ms ease;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 36px;
  --space-xl: 48px;
  --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --color-gray-light: #f5f5f5;
  --color-gray-mid: #eee;
  --color-text-gray: #555;
  --success-green: #34c759;
}

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

body {
  font-family: var(--font-main);
  background: var(--color-white);
}

.video-showcase-container {
  width: 100%;
  max-width: 1440px;
  margin: var(--space-xl) auto;
  padding: 0 var(--space-md);
}

.showcase-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.showcase-header h2 {
  font-size: 42px;
  font-weight: 600;
  color: var(--color-black);
  letter-spacing: -0.5px;
  margin-bottom: var(--space-xs);
}

.showcase-header p {
  font-size: 17px;
  color: #666;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

.showcase-grid {
  display: grid;
  grid-template-columns: 8fr 2fr;
  gap: var(--space-xl);
  align-items: start;
}

.main-player-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.main-video-card {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 5;
  max-height: 760px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  transition: var(--transition-base);
  background: #000;
}

/* 圆形三角播放图标样式 */
.video-play-icon {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 90px;
  height: 90px;
  background: rgba(0, 0, 0, 0.55);
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
}
.video-play-icon:hover {
  width: 100px;
  height: 100px;
  background: rgba(0, 0, 0, 0.75);
  border-color: var(--color-red);
}
.video-play-icon.hide {
  opacity: 0;
  pointer-events: none;
}
.video-play-icon svg {
  width: 36px;
  height: 36px;
  fill: #ffffff;
  transition: fill 0.3s ease;
}
.video-play-icon:hover svg {
  fill: var(--color-red);
}

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

.main-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.video-info-block {
  padding: var(--space-md);
  background: var(--color-gray-light);
  border-radius: var(--radius-lg);
}

.video-info-block h3 {
  font-size: 28px;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: var(--space-sm);
}

.video-info-desc {
  font-size: 16px;
  color: var(--color-text-gray);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-sm);
}

.tag-item {
  padding: 6px 14px;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 100px;
  font-size: 13px;
  color: #333;
  font-weight: 500;
}

/* 强化版CTA 原地增加信任背书 */
.cta-banner {
  margin-top: var(--space-lg);
  background: #111111;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  color: var(--color-white);
}

.cta-banner h4 {
  font-size: 30px;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.cta-banner p {
  font-size: 16px;
  opacity: 0.85;
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.cta-trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.trust-col {
  flex: 1;
  min-width: 140px;
}
.trust-col h5 {
  font-size: 15px;
  margin-bottom: 6px;
  opacity: 0.95;
}
.trust-col p {
  font-size: 13px;
  opacity: 0.7;
  margin: 0;
}

.cert-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.badge-item {
  padding: 8px 16px;
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-sm);
  font-size: 14px;
}

.cta-button-group {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.cta-btn {
  flex: 1;
  min-width: 160px;
  text-align: center;
  padding: 16px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition-base);
  display: inline-block;
}

.cta-btn:hover {
  transform: scale(1.04);
}

.btn-whatsapp {
  background: var(--color-whatsapp);
  color: var(--color-white);
}

.btn-email {
  background: var(--color-white);
  color: var(--color-black);
}

.btn-quote {
  background: var(--color-red);
  color: var(--color-white);
}

/* 右侧播放列表样式 */
.playlist-column h4 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid #eee;
  display: flex;
  align-items: center;
  gap: 8px;
}
.playlist-column h4::after {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--success-green);
  border-radius: 50%;
}

.playlist-scroll-wrap {
  max-height: 680px;
  overflow-y: auto;
  padding-right: 6px;
}

.playlist-scroll-wrap::-webkit-scrollbar {
  width: 4px;
}
.playlist-scroll-wrap::-webkit-scrollbar-track {
  background: #f1f1f1;
  border-radius: 10px;
}
.playlist-scroll-wrap::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 10px;
}
.playlist-scroll-wrap::-webkit-scrollbar-thumb:hover {
  background: #aaa;
}

.playlist-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.playlist-item {
  padding: 10px;
  border-radius: var(--radius-md);
  background: #f8f8f8;
  cursor: pointer;
  transition: var(--transition-base);
  display: flex;
  gap: 10px;
  position: relative;
}
.playlist-item::before {
  content: "";
  position: absolute;
  top: 10px;
  right: 10px;
  width: 6px;
  height: 6px;
  background: var(--success-green);
  border-radius: 50%;
}

.playlist-item:hover {
  background: #f0f0f0;
  transform: translateX(4px) scale(1.02);
  box-shadow: var(--shadow-soft);
}

.playlist-item.active {
  background: #eeeeee;
  border: 1px solid var(--color-red);
}

.playlist-preview-wrap {
  width: 70px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #000;
  aspect-ratio: 4 / 5;
}

.playlist-preview {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.playlist-text h5 {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: 3px;
  line-height: 1.3;
}
.playlist-tag-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
}
.playlist-category-tag {
  font-size: 9px;
  color: var(--color-red);
  border: 1px solid var(--color-red);
  padding: 1px 5px;
  border-radius: 4px;
  display: inline-block;
}
.playlist-duration-text {
  font-size: 9px;
  color: #777;
}

.playlist-text p {
  font-size: 10px;
  color: #666;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.fade-wrap {
  opacity: 1;
  transition: opacity 300ms ease;
}
.fade-wrap.fade-out {
  opacity: 0;
}

/* FAQ 模块 */
.faq-section {
  margin-top: var(--space-xl);
  max-width: 1440px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--space-md);
}
.faq-section h3 {
  text-align: center;
  font-size: 32px;
  margin-bottom: var(--space-lg);
  color: var(--color-black);
}
.faq-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.faq-item {
  border: 1px solid #eee;
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-q {
  padding: var(--space-md);
  background: var(--color-gray-light);
  font-weight: 600;
  font-size: 17px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-q::after {
  content: "+";
  font-size: 20px;
  color: #666;
}
.faq-a {
  padding: 0 var(--space-md);
  max-height: 0;
  overflow: hidden;
  transition: var(--transition-base);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text-gray);
}
.faq-item.open .faq-q::after {
  content: "-";
}
.faq-item.open .faq-a {
  padding: 0 var(--space-md) var(--space-md);
  max-height: 600px;
}

@media screen and (max-width: 1024px) {
  .showcase-grid {
    grid-template-columns: 1fr;
  }
  .playlist-column {
    order: 2;
  }
  .main-player-wrap {
    order: 1;
  }
  .main-video-card {
    max-height: none;
  }
  .playlist-scroll-wrap {
    max-height: 320px;
  }
  .cta-trust-row {
    flex-direction: column;
    gap: var(--space-sm);
  }
}

@media screen and (max-width: 640px) {
  .showcase-header h2 {
    font-size: 30px;
  }
  .video-info-block h3 {
    font-size: 22px;
  }
  .cta-banner h4 {
    font-size: 24px;
  }
  .playlist-item {
    flex-direction: row;
  }
  .playlist-preview-wrap {
    width: 60px;
  }
  .faq-section h3 {
    font-size: 24px;
  }
}