html, body {
  height: 100%;
  margin: 0;
  background: #000;
  color: #ffff62d0;
  overflow-x: hidden;
}

#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: block;
  pointer-events: none;   /* ✅ 不再拦截滚动/触摸 */
}


.about-btn {
  position: fixed;
  top: 80px;
  right: 90px;
  z-index: 2;
  font-family: 'Bangers', cursive;
  font-size: clamp(30px, 4vw, 32px);
  color: #ffff62d0;
  text-decoration: none;
  text-shadow: 0 0 8px rgba(255,255,150,0.6),
               0 0 18px rgba(255,255,100,0.3);
  letter-spacing: 2px;
  transition: transform .15s ease, opacity .15s ease;
  cursor: pointer;
}
.about-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* 页面内容布局 */
.content {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1rem;
}

/* 主标题 */
h1 {
  font-family: 'Bangers', cursive;
  font-size: clamp(72px, 16vw, 200px);
  margin-top: 200px;
  letter-spacing: 4px;
  text-shadow: 0 0 10px rgb(237, 237, 73),
               0 0 24px rgba(255, 255, 130, 0.36);
}

/* ✅ 图片容器：一行 3 个，上下对齐，行距大 */
.photo-container {
  display: grid;
  grid-template-columns: repeat(3, minmax(240px, 1fr));
  justify-items: center;        /* ✅ 每个格子内居中 */
  justify-content: center;      /* ✅ 整个网格在容器内居中 */
  align-items: center;
  gap: 100px 60px;

  width: 100%;
  max-width: 1200px;            /* ✅ 给网格一个最大宽度 */
  margin: 190px auto 0;         /* ✅ 居中（auto 两侧外边距） */
  padding: 0 6vw;
}

/* ✅ 图片按钮样式 */
.photo-btn {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  background: none;
  border: none;
  outline: none;
  box-shadow: none;
  cursor: pointer;
  transition: transform .16s ease, opacity .16s ease;
}
.photo-btn:hover {
  transform: translateY(-2px) scale(1.02);
}

/* ✅ 图片统一大小 + 羽化边缘 + 90% 透明度 */
.photo-btn img {
  width: min(26vw, 320px);
  height: auto;
  border: none;
  outline: none;
  box-shadow: none;
  opacity: 0.8;
  object-fit: cover;

  /* 边缘羽化（虚化） */
  -webkit-mask-image: radial-gradient(circle at center, #000 72%, rgba(0,0,0,0) 100%);
  mask-image: radial-gradient(circle at center, #000 72%, rgba(0,0,0,0) 100%);
  -webkit-mask-size: 100% 100%;
  mask-size: 100% 100%;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
}

/* 不再左移第一张 */
#cover1 {
  transform: none;
}

/* hover 标签（保留） */
.photo-label {
  position: absolute;
  right: 14px;
  bottom: 10px;
  max-width: calc(100% - 28px);
  padding: 6px 10px;
  border-radius: 10px;
  font: 500 14px/1.25 system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: rgba(255,255,255,.92);
  background: rgba(0,0,0,.45);
  text-shadow: 0 1px 2px rgba(0,0,0,.4);
  pointer-events: none;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .18s ease, transform .18s ease;
}
.photo-btn:hover .photo-label,
.photo-btn:focus-visible .photo-label {
  opacity: 1;
  transform: translateY(0);
}

/* ✅ 小屏幕自动上下排列 */
@media (max-width: 768px) {
  .photo-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .photo-btn img {
    width: 80vw;
  }
}

/* ✅ 标题放大 40% */
h1, h2, h3, h4, h5, h6 {
  font-size: 140%;
}

/* === Hover 弹窗（灰底 + 黄色字）— 仅改CSS，无需动HTML === */
.photo-btn { position: relative; }

/* 弹窗主体 */
.photo-btn::after {
  position: absolute;
  z-index: 5;
  bottom: 110%;                      /* 弹在图片上方；要在下方可改为 top:110% 并调整 before */
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  max-width: min(60vw, 34rem);
  padding: 12px 14px;
  border-radius: 12px;

  background: rgba(64,64,64,0.92);   /* 灰色窗口 */
  color: #ffff62d0;                  /* 与标题一致的黄色字 */
  text-align: left;
  font: 500 14px/1.45 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  letter-spacing: .2px;
  box-shadow: 0 8px 30px rgba(0,0,0,.45);
  pointer-events: none;              /* 不挡鼠标 */
  opacity: 0;
  transition: opacity .18s ease, transform .18s ease;
  white-space: normal;

  /* 默认空，下面用 nth-child 分别设置文本 */
  content: "";
}

/* 悬停/聚焦时显现 */
.photo-btn:hover::after,
.photo-btn:focus-within::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.photo-btn:hover::before,
.photo-btn:focus-within::before {
  opacity: 1;
}

.photo-container .photo-btn:nth-child(1)::after { content: "Polar Bear Human"; }
.photo-container .photo-btn:nth-child(2)::after { content: "Bat Human"; }
.photo-container .photo-btn:nth-child(3)::after { content: "Axolotl Human"; }
.photo-container .photo-btn:nth-child(4)::after { content: "Giraffe Human"; }
.photo-container .photo-btn:nth-child(5)::after { content: "Shark Human"; }
.photo-container .photo-btn:nth-child(6)::after { content: "Frog Human"; }

/* 窄屏时：弹窗更紧凑一点 */
@media (max-width: 768px) {
  .photo-btn::after {
    bottom: 115%;
    max-width: min(86vw, 28rem);
    font-size: 13px;
  }
}

/* 关掉动效（系统偏好：减少动画） */
@media (prefers-reduced-motion: reduce) {
  .photo-btn::after, .photo-btn::before { transition: none; }
}

/* === 页脚 Footer 区域 === */
footer {
  position: relative;   /* 建立层叠上下文 */
  z-index: 1;           /* 放到 starfield 上面 */
  background: #00000000;
  color: #ffff62d0;
  text-align: center;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  padding: 80px 20px 60px 20px;
  margin-top: 140px;
}


footer h2 {
  font-family: 'Bangers', cursive;
  font-size: clamp(30px, 4vw, 50px);
  margin-bottom: 40px;
  text-shadow: 0 0 10px rgba(255, 255, 120, 0.4);
}

.footer-columns {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 80px;
  max-width: 1100px;
  margin: 0 auto;
  text-align: left;
}

.footer-column {
  min-width: 200px;
}

.footer-column h3 {
  font-family: 'Bangers', cursive;
  font-size: 22px;
  margin-bottom: 14px;
  color: #ffff62d0;
}

.footer-column p {
  font-size: 15px;
  color: rgba(255,255,180,0.8);
  line-height: 1.7;
  margin: 4px 0;
}

/* 小屏幕时 Footer 垂直排列 */
@media (max-width: 768px) {
  .footer-columns {
    flex-direction: column;
    align-items: center;
    gap: 40px;
  }
  .footer-column {
    text-align: center;
  }
}

.video-container {
  margin-top: 100px;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1;
}

.video-container video {
  width: 70%;
  max-width: 800px;
  border: none;
  outline: none;
  border-radius: 12px;
  box-shadow: 0 0 30px rgba(255, 255, 120, 0.2);
}
.section-title {
  font-family: 'Bangers', cursive;
  color: #ffff62d0;
  text-align: center;
  font-size: clamp(48px, 5vw, 72px); /* 稍微柔和一些比例 */
  letter-spacing: 2px;
  text-shadow: 
    0 0 12px rgba(255,255,150,0.7),
    0 0 30px rgba(255,255,100,0.4);
  margin-top: 190px;   /* ✅ 距离视频的间距更自然 */
  margin-bottom: 20px; /* ✅ 与下方内容保持节奏 */
}