/* 基础样式 */
body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
  min-height: 100vh;
}

.banner {
  background: linear-gradient(45deg, #ff6b6b, #ff8e8e);
  padding: 3rem 2rem;
  text-align: center;
  color: white;
  box-shadow: 0 4px 20px rgba(255,107,107,0.2);
  position: relative;
  overflow: hidden;
}

.banner h1 {
  margin: 0;
  font-size: 2.5rem;
  letter-spacing: 2px;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
  animation: fadeInDown 0.8s ease-out;
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
  animation: rotate 20s linear infinite;
}

/* 网格布局模式 */
.grid-view {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  padding: 3rem 2rem;
  animation: fadeIn 1s ease-out;
}

.photo-card {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
  background: white;
  transform-origin: center;
  cursor: pointer;
}

.photo-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

.photo-wrapper {
  position: relative;
  padding-top: 75%;
  overflow: hidden;
}

.photo-wrapper img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.photo-card:hover .photo-wrapper img {
  transform: scale(1.1);
}

.photo-edit {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  background: rgba(255,255,255,0.95);
  border: none;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  color: #333;
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
  width: calc(100% - 32px);
  box-sizing: border-box;
  opacity: 0;
}

.photo-card:hover .photo-edit {
  opacity: 1;
  transform: translateY(0);
}

.photo-edit::placeholder {
  color: #999;
  font-size: 0.9rem;
}

.photo-edit:focus {
  outline: none;
  box-shadow: 0 4px 16px rgba(255,107,107,0.2);
  transform: translateY(-2px);
  opacity: 1;
}

/* 轮播模式 */
.carousel-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.carousel-container:not(.hidden) {
  opacity: 1;
}

.carousel-item {
  width: 100%;
  height: 100%;
  object-fit: contain;
  max-height: 85vh;
  margin: 0 auto;
  opacity: 0.8;
  transition: opacity 0.3s ease;
}

.carousel-item:hover {
  opacity: 1;
}

.carousel {
  width: 90%;
  height: 85vh;
  display: flex;
  align-items: center;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.15);
  border: 2px solid rgba(255,255,255,0.3);
  padding: 1.2rem;
  font-size: 2rem;
  color: white;
  cursor: pointer;
  border-radius: 50%;
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.nav-btn:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-50%) scale(1.1);
}

.close-btn {
  position: fixed;
  right: 2rem;
  top: 2rem;
  background: rgba(255,107,107,0.9);
  width: 50px;
  height: 50px;
  font-size: 2rem;
  line-height: 50px;
  border: none;
  color: white;
  border-radius: 25px;
  z-index: 2000;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.close-btn:hover {
  transform: rotate(90deg) scale(1.1);
  background: #ff6b6b;
}

.prev { left: 2rem; }
.next { right: 2rem; }

.hidden { 
  display: none;
  opacity: 0;
}

/* 动画关键帧 */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 移动端适配 */
@media (max-width: 768px) {
  .banner {
    padding: 2rem 1rem;
  }

  .banner h1 {
    font-size: 2rem;
  }

  .grid-view {
    grid-template-columns: 1fr;
    padding: 1.5rem 1rem;
    gap: 1.5rem;
  }

  .carousel {
    width: 95%;
    height: 60vh;
  }

  .nav-btn {
    padding: 0.8rem;
    font-size: 1.5rem;
  }

  .close-btn {
    right: 1rem;
    top: 1rem;
    width: 40px;
    height: 40px;
    line-height: 40px;
    font-size: 1.5rem;
  }
}