/* 主页样式 - 党建红色风格 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: linear-gradient(135deg, #b91c1c 0%, #dc2626 50%, #991b1b 100%);
  min-height: 100vh;
  overflow-x: hidden;
  color: #fff;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(255, 215, 0, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
  z-index: 0;
  pointer-events: none;
}

#particles-js {
  position: fixed;
  inset: 0;
  z-index: -1;
}

/* 头部 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 10000;
  background: rgba(153, 27, 27, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 215, 0, 0.3);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.55rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

/* 随机阅读按钮 - 金色主题 */
.random-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 193, 7, 0.3));
  border: 1.5px solid rgba(255, 215, 0, 0.6);
  border-radius: 25px;
  padding: 0.4rem 1rem;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  color: #ffd700;
  transition: all 0.3s ease;
  box-shadow: 0 2px 10px rgba(255, 215, 0, 0.2);
  cursor: pointer;
}

.random-btn:hover {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.35), rgba(255, 193, 7, 0.45));
  border-color: rgba(255, 215, 0, 0.9);
  box-shadow: 0 4px 18px rgba(255, 215, 0, 0.4);
  transform: translateY(-1px);
  color: #ffed4a;
}

.random-btn i {
  font-size: 0.95rem;
}

/* 主标题按钮 - 党建红色主题 */
.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(255, 193, 7, 0.25));
  border: 1.5px solid rgba(255, 215, 0, 0.5);
  border-radius: 40px;
  padding: 0.45rem 1.4rem;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 12px rgba(255, 215, 0, 0.2);
}

.logo:hover {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.25), rgba(255, 193, 7, 0.35));
  box-shadow: 0 4px 20px rgba(255, 215, 0, 0.35);
  transform: translateY(-1px);
}

.logo .fa-flag {
  color: #ffd700;
  font-size: 1.3rem;
  animation: flagwave 2s ease-in-out infinite;
}

@keyframes flagwave {
  0%, 100% { transform: rotate(-5deg); }
  50%       { transform: rotate(5deg); }
}

.logo-text {
  font-size: 1.4rem;
  font-weight: 700;
  background: linear-gradient(135deg, #ffd700, #ffed4a, #ffd700);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.05em;
}

.logo-info {
  font-size: 0.95rem;
  color: #ffd700;
  opacity: 0.8;
  margin-left: 0.1rem;
}

/* ============================================================
   介绍弹窗 - 红色主题
   ============================================================ */
.intro-overlay {
  position: fixed;
  inset: 0;
  z-index: 20000;
  background: rgba(139, 0, 0, 0.35);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.intro-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.intro-modal {
  background: linear-gradient(160deg, #1a1a1a 0%, #2d2d2d 100%);
  border-radius: 24px;
  padding: 2.5rem 2.2rem 2rem;
  max-width: 480px;
  width: 90%;
  position: relative;
  box-shadow: 0 20px 60px rgba(255, 215, 0, 0.15);
  border: 1px solid rgba(255, 215, 0, 0.3);
  transform: scale(0.9);
  transition: transform 0.3s ease;
  text-align: center;
}

.intro-overlay.active .intro-modal {
  transform: scale(1);
}

.intro-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(255, 215, 0, 0.15);
  border: none;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  cursor: pointer;
  color: #ffd700;
  font-size: 0.9rem;
  transition: background 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.intro-close:hover {
  background: rgba(255, 215, 0, 0.3);
}

.intro-icon {
  font-size: 2.5rem;
  color: #ffd700;
  margin-bottom: 0.8rem;
  animation: flagwave 2s ease-in-out infinite;
}

.intro-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: #ffd700;
  margin-bottom: 0.6rem;
  letter-spacing: 0.08em;
}

.intro-divider {
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, #ffd700, #ffed4a);
  border-radius: 2px;
  margin: 0 auto 1.2rem;
}

.intro-body {
  font-size: 0.95rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 0.9rem;
  text-align: left;
}

.intro-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1.2rem;
}

.intro-tags span {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(255, 193, 7, 0.25));
  border: 1px solid rgba(255, 215, 0, 0.4);
  border-radius: 20px;
  padding: 0.3rem 0.8rem;
  font-size: 0.82rem;
  color: #ffd700;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

/* 云展厅链接按钮 - 金色主题 */
.vr-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 193, 7, 0.3));
  border: 1.5px solid rgba(255, 215, 0, 0.6);
  border-radius: 25px;
  padding: 0.4rem 1rem;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  color: #ffd700;
  transition: all 0.3s ease;
  box-shadow: 0 2px 10px rgba(255, 215, 0, 0.2);
  cursor: pointer;
}

.vr-link:hover {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.35), rgba(255, 193, 7, 0.45));
  border-color: rgba(255, 215, 0, 0.9);
  box-shadow: 0 4px 18px rgba(255, 215, 0, 0.4);
  transform: translateY(-1px);
  color: #ffed4a;
}

.vr-link i {
  font-size: 0.95rem;
}

/* 云展厅弹窗 - 金色主题 */
.vr-overlay {
  position: fixed;
  inset: 0;
  z-index: 20000;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.vr-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.vr-modal {
  background: linear-gradient(160deg, #1a1a1a 0%, #2d2d2d 100%);
  border-radius: 24px;
  padding: 2.5rem 2.2rem 2rem;
  max-width: 450px;
  width: 90%;
  position: relative;
  box-shadow: 0 20px 60px rgba(255, 215, 0, 0.15);
  border: 1px solid rgba(255, 215, 0, 0.3);
  transform: scale(0.9);
  transition: transform 0.3s ease;
  text-align: center;
}

.vr-overlay.active .vr-modal {
  transform: scale(1);
}

.vr-modal .intro-icon {
  color: #ffd700;
}

.vr-modal .intro-title {
  color: #ffd700;
}

.vr-modal .intro-divider {
  background: linear-gradient(90deg, #ffd700, #ffed4a);
}

.vr-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
  margin: 1.2rem 0;
  text-align: left;
}

.vr-feature-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: #e0e0e0;
  padding: 0.5rem 0.8rem;
  background: rgba(255, 215, 0, 0.1);
  border-radius: 12px;
}

.vr-feature-item i {
  color: #ffd700;
  font-size: 0.9rem;
}

.vr-enter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, #ffd700 0%, #ff9800 100%);
  color: #1a1a1a;
  text-decoration: none;
  padding: 0.85rem 2rem;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 600;
  margin-top: 0.5rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
}

.vr-enter-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 215, 0, 0.5);
}

/* ============================================================
   云展播通栏
   ============================================================ */
.vr-banner {
  width: 100%;
  max-width: 960px;
  margin: 0 auto 24px;
}

.vr-banner-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(255, 152, 0, 0.2) 100%);
  border: 1.5px solid rgba(255, 215, 0, 0.5);
  border-radius: 16px;
  padding: 1.2rem 1.5rem;
  box-shadow: 0 4px 20px rgba(255, 215, 0, 0.2);
  transition: all 0.3s ease;
}

.vr-banner-inner:hover {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.25) 0%, rgba(255, 152, 0, 0.3) 100%);
  box-shadow: 0 6px 30px rgba(255, 215, 0, 0.3);
}

.vr-banner-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.vr-banner-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, #ffd700, #ff9800);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.vr-banner-icon i {
  font-size: 1.6rem;
  color: #1a1a1a;
}

.vr-banner-content {
  min-width: 0;
}

.vr-banner-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffd700;
  margin: 0 0 0.3rem;
  letter-spacing: 0.03em;
}

.vr-banner-desc {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
  margin: 0;
  line-height: 1.4;
}

.vr-banner-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  flex: 1;
}

.vr-feature-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.78rem;
  color: #e0e0e0;
  padding: 0.4rem 0.7rem;
  background: rgba(255, 215, 0, 0.12);
  border-radius: 16px;
  white-space: nowrap;
}

.vr-feature-tag i {
  color: #ffd700;
  font-size: 0.85rem;
}

.vr-banner-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, #ffd700 0%, #ff9800 100%);
  color: #1a1a1a;
  text-decoration: none;
  padding: 0.7rem 1.4rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 2px 10px rgba(255, 215, 0, 0.3);
  white-space: nowrap;
  flex-shrink: 0;
}

.vr-banner-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 215, 0, 0.5);
}

/* 手机端云展播通栏 */
@media (max-width: 768px) {
  .vr-banner {
    margin: 0 10px 16px;
  }
  
  .vr-banner-inner {
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
    padding: 0.9rem 1rem;
    gap: 0.8rem;
  }
  
  .vr-banner-left {
    width: 100%;
    justify-content: center;
    gap: 0.8rem;
  }
  
  .vr-banner-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
  }
  
  .vr-banner-icon i {
    font-size: 1.3rem;
  }
  
  .vr-banner-content {
    text-align: left;
  }
  
  .vr-banner-title {
    font-size: 1rem;
    margin-bottom: 0.2rem;
  }
  
  .vr-banner-desc {
    font-size: 0.75rem;
  }
  
  .vr-banner-features {
    width: 100%;
    gap: 0.4rem;
  }
  
  .vr-feature-tag {
    font-size: 0.7rem;
    padding: 0.3rem 0.55rem;
  }
  
  .vr-feature-tag i {
    font-size: 0.75rem;
  }
  
  .vr-banner-btn {
    padding: 0.55rem 1.1rem;
    font-size: 0.85rem;
  }
}

/* ============================================================
   照片网格布局（适合少量图片）
   ============================================================ */
.photo-grid-container {
  position: relative;
  min-height: calc(100vh - 140px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 90px 20px 100px;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
}

.photo-grid-item {
  aspect-ratio: 4/3;
  border-radius: 14px;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(183, 28, 28, 0.25);
  background: transparent;
  position: relative;
  perspective: 800px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.photo-grid-item:hover {
  box-shadow: 0 14px 40px rgba(183, 28, 28, 0.35);
  transform: translateY(-6px);
  z-index: 100;
}

.photo-grid-item-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
  border-radius: 14px;
}

.photo-grid-item.flipped .photo-grid-item-inner {
  transform: rotateY(180deg);
}

.photo-grid-front {
  position: absolute;
  inset: 0;
  border-radius: 14px;
  overflow: hidden;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: #ffcdd2;
}

.photo-grid-front img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-grid-name {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(transparent, rgba(139, 0, 0, 0.75));
  color: #fff;
  text-align: center;
  font-size: 1rem;
  font-weight: 600;
  padding: 18px 10px 10px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.05em;
}

.photo-grid-back {
  position: absolute;
  inset: 0;
  border-radius: 14px;
  overflow: hidden;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform: rotateY(180deg);
  background: linear-gradient(160deg, #fff5f5 0%, #ffebee 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px 14px;
  text-align: center;
  border: 2px solid rgba(183, 28, 28, 0.4);
}

.photo-grid-back-icon {
  font-size: 1.6rem;
  color: #c62828;
  margin-bottom: 10px;
}

.photo-grid-back-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: #b71c1c;
  margin-bottom: 10px;
  line-height: 1.4;
  letter-spacing: 0.03em;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  text-overflow: ellipsis;
}

.photo-grid-back-summary {
  font-size: 0.85rem;
  color: #7a4c4c;
  line-height: 1.6;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  text-align: left;
  width: 100%;
}

.no-data {
  color: rgba(183, 28, 28, 0.7);
  font-size: 1.2rem;
  text-align: center;
  padding: 40px;
  width: 100%;
}

/* 响应式：小屏幕改为2列 */
@media (max-width: 768px) {
  .photo-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 500px;
  }

  .photo-grid-container {
    padding: 80px 16px 90px;
  }

  .photo-grid-name {
    font-size: 0.9rem;
    padding: 14px 8px 8px;
  }

  .photo-grid-back-name {
    font-size: 0.95rem;
  }

  .photo-grid-back-summary {
    font-size: 0.8rem;
    -webkit-line-clamp: 3;
  }
}

@media (max-width: 480px) {
  .photo-grid {
    gap: 12px;
  }

  .photo-grid-name {
    font-size: 0.85rem;
    padding: 12px 6px 6px;
  }
}

/* 底部浮动统计栏 - 金色边框 */
.bottom-bar {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9000;
  display: flex;
  align-items: center;
  gap: 0;
  background: rgba(26, 26, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 215, 0, 0.4);
  border-radius: 40px;
  padding: 0.55rem 1.5rem;
  box-shadow: 0 6px 30px rgba(0, 0, 0, 0.3);
  white-space: nowrap;
}

.bottom-bar .stat-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 0.9rem;
}

.stat-icon {
  font-size: 1.1rem;
  color: #ffd700;
}

.stat-number {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.2;
}

.stat-divider {
  width: 1px;
  height: 28px;
  background: rgba(255, 215, 0, 0.3);
  flex-shrink: 0;
}

.stat-copyright {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  padding: 0 0.6rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
}

.tech-support-text {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.5);
  opacity: 0.9;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 768px) {
  .random-btn {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.35rem 0.8rem;
    font-size: 0.8rem;
  }

  .random-btn span {
    display: none;
  }

  .random-btn i {
    font-size: 1rem;
  }

  .vr-link {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.35rem 0.8rem;
    font-size: 0.8rem;
  }

  .vr-link span {
    display: none;
  }

  .vr-link i {
    font-size: 1rem;
  }

  .header-inner {
    justify-content: center;
    padding: 0.5rem 1rem;
    position: relative;
  }

  .logo-text {
    font-size: 1.1rem;
  }

  .vr-features {
    grid-template-columns: 1fr;
  }
  
  .photo-grid-container {
    padding: 80px 15px 100px;
  }
  
  .photo-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .bottom-bar {
    padding: 0.45rem 0.8rem;
    bottom: 12px;
    border-radius: 30px;
  }

  .bottom-bar .stat-item {
    padding: 0 0.5rem;
    gap: 0.35rem;
  }

  .stat-icon {
    font-size: 0.95rem;
  }

  .stat-number {
    font-size: 0.95rem;
  }

  .stat-label {
    font-size: 0.62rem;
  }

  .stat-copyright {
    display: none;
  }
}

@media (max-width: 480px) {
  .bottom-bar {
    gap: 0;
    padding: 0.4rem 0.6rem;
  }
}