* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #faf9f6;
  color: #3d3a36;
  line-height: 1.8;
  overflow-x: hidden;
}
.header {
  background: linear-gradient(135deg, #1a2e1d, #3d6b42);
  color: #fff;
  padding: 48px 24px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.header::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.06) 0%,
    transparent 70%
  );
  border-radius: 50%;
}
.header-tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.12);
  padding: 5px 18px;
  border-radius: 50px;
  font-size: 0.78rem;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
  backdrop-filter: blur(4px);
}
.header h1 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 4px;
  position: relative;
  z-index: 1;
}
.header .subtitle {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.65);
  position: relative;
  z-index: 1;
  margin-top: 6px;
}
.back-btn {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 10;
  color: #fff;
  font-size: 1.4rem;
  text-decoration: none;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  transition: background 0.2s;
}
.back-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}

.banner-wrap {
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  background: #e8e5df;
  aspect-ratio: 1;
}
.banner-swipe {
  display: flex;
  transition: transform 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  will-change: transform;
}
.banner-slide {
  flex: 0 0 100%;
  min-width: 100%;
}
.banner-slide img,
.single-banner {
  width: 100%;
  display: block;
  object-fit: contain;
  max-height: none;
}
.banner-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 5;
}
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all 0.3s;
}
.dot.active {
  background: #fff;
  width: 24px;
  border-radius: 4px;
}
.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  background: rgba(0, 0, 0, 0.25);
  color: #fff;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.4rem;
  cursor: pointer;
  transition: background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.banner-arrow:hover {
  background: rgba(0, 0, 0, 0.45);
}
.banner-arrow.prev {
  left: 12px;
}
.banner-arrow.next {
  right: 12px;
}

.tabs {
  display: flex;
  justify-content: space-around;
  max-width: 860px;
  margin: 0 auto;
  background: #fff;
  border-bottom: 1px solid #eee;
  position: sticky;
  top: 0;
  z-index: 20;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tabs::-webkit-scrollbar {
  display: none;
}
.tab {
  padding: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #999;
  border: none;
  background: none;
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  flex-shrink: 0;
}
.tab.active {
  color: #3d6b42;
  border-bottom-color: #3d6b42;
}
.tab:hover {
  color: #3d6b42;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px 60px;
}
section {
  padding-top: 40px;
}
.section-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #1a2e1d;
  margin-bottom: 10px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.section-title span {
  position: relative;
  padding-left: 14px;
}
.section-title span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  background: #3d6b42;
  border-radius: 2px;
}
.section-title em {
  font-size: 0.78rem;
  color: #aaa;
  font-weight: 400;
  font-style: normal;
}

.rich-content {
}
.rich-content img {
  max-width: 100%;
  height: auto;
  display: block;
}
.rich-content p {
  margin-bottom: 12px;
  font-size: 0.93rem;
  color: #5a5650;
  line-height: 1.9;
}
.rich-content p:last-child {
  margin-bottom: 0;
}

.qa-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.qa-item {
  background: #fff;
  border-radius: 14px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
  transition: box-shadow 0.2s;
}
.qa-item[open] {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}
.qa-q {
  font-size: 1rem;
  font-weight: 700;
  color: #2c3e2d;
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  list-style: none;
  user-select: none;
}
.qa-q::-webkit-details-marker {
  display: none;
}
.qa-q::after {
  content: "∨";
  font-size: 0.8rem;
  color: #aaa;
  margin-left: auto;
  flex-shrink: 0;
  transition: transform 0.3s;
  margin-top: 2px;
}
.qa-item[open] .qa-q::after {
  transform: rotate(180deg);
  color: #3d6b42;
}
.qa-q:hover {
  background: #f8faf7;
}
.qa-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: #e8f0e6;
  color: #3d6b42;
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
}
.qa-a {
  padding: 0 24px 18px 60px;
  color: #5a5650;
  font-size: 0.9rem;
  line-height: 1.9;
}
.qa-a p {
  margin-bottom: 8px;
}
.qa-highlight {
  font-weight: 600;
  color: #2c3e2d;
}

.image-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}
.gallery-item {
  aspect-ratio: 1;
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  background: #e8e5df;
  transition: transform 0.2s;
}
.gallery-item:hover {
  transform: scale(1.03);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.video-card {
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid rgba(0, 0, 0, 0.06);
  transition: all 0.2s;
}
.video-card:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}
.video-thumb {
  aspect-ratio: 16/9;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.video-play {
  width: 52px;
  height: 52px;
  background: rgba(0, 0, 0, 0.55);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  transition: all 0.2s;
  backdrop-filter: blur(2px);
}
.video-card:hover .video-play {
  background: rgba(61, 107, 66, 0.8);
  transform: scale(1.1);
}
.video-name {
  display: block;
  padding: 12px 14px;
  font-size: 0.85rem;
  color: #5a5650;
  font-weight: 500;
}

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.lightbox.show {
  display: flex;
}
.lightbox img {
  max-width: 90vw;
  max-height: 75vh;
  border-radius: 8px;
  object-fit: contain;
}
.lightbox-close {
  position: absolute;
  top: 20px;
  right: 28px;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  z-index: 1;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: #fff;
  font-size: 2.5rem;
  cursor: pointer;
  z-index: 1;
  background: rgba(255, 255, 255, 0.1);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  transition: background 0.2s;
}
.lightbox-arrow:hover {
  background: rgba(255, 255, 255, 0.25);
}
.lightbox-arrow.prev {
  left: 16px;
}
.lightbox-arrow.next {
  right: 16px;
}
.lightbox-counter {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.85rem;
  margin-top: 16px;
}

.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  z-index: 999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}
.video-modal.show {
  display: flex;
}
.video-modal video {
  max-width: 94vw;
  max-height: 75vh;
  border-radius: 8px;
}
.video-modal-title {
  color: rgba(255, 255, 255, 0.8);
  margin-top: 16px;
  font-size: 0.95rem;
}

.footer {
  text-align: center;
  padding: 40px 24px;
  border-top: 1px solid #eee;
  margin-top: 20px;
}
.footer a {
  color: #3d6b42;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}
.footer a:hover {
  text-decoration: underline;
}
.footer .copy {
  color: #bbb;
  font-size: 0.78rem;
  margin-top: 8px;
}

@media (max-width: 640px) {
  .container {
    padding: 0 16px 40px;
  }
  section {
    padding-top: 18px;
  }
  .section-title {
    font-size: 1.1rem;
  }
  .rich-content {
  }
  .qa-q {
    padding: 14px 16px;
    font-size: 0.93rem;
  }
  .qa-a {
    padding: 0 16px 14px 52px;
  }
  .image-gallery {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }
  .video-grid {
    grid-template-columns: 1fr;
  }
  .banner-arrow {
    width: 32px;
    height: 32px;
    font-size: 1.1rem;
  }
}