/* ===== 基础重置 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #0f0f0f;
  color: #e0e0e0;
  min-height: 100vh;
  /* 防止 iOS 橡皮筋效果导致误触 */
  overscroll-behavior-y: none;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ===== 顶部导航 ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 15, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid #222;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: #fff;
  /* 增大触控区域 */
  padding: 8px 0;
}

.nav {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.nav-link {
  padding: 8px 14px;
  border-radius: 18px;
  font-size: 13px;
  color: #999;
  transition: all 0.2s;
  white-space: nowrap;
  /* 触控最小 44px 高度 */
  min-height: 36px;
  display: flex;
  align-items: center;
}

.nav-link:hover {
  color: #fff;
  background: #1a1a1a;
}

.nav-link.active {
  color: #fff;
  background: #4f46e5;
}

.menu-toggle {
  display: none;
  background: #222;
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  min-height: 44px;
  min-width: 44px;
}

/* ===== 主区域 ===== */
.main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px 12px 80px;
}

/* ===== Hero 区 ===== */
.hero {
  text-align: center;
  padding: 24px 0 12px;
}

.hero h1 {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
  letter-spacing: -1px;
  line-height: 1.2;
}

.hero p {
  font-size: 14px;
  color: #777;
  max-width: 500px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ===== 板块切换标签 ===== */
.section-tabs {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin: 20px 0 8px;
  background: #1a1a1a;
  border-radius: 12px;
  padding: 4px;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.section-tab {
  flex: 1;
  padding: 10px 8px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: #888;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  text-align: center;
  min-height: 40px;
}

.section-tab.active {
  background: #4f46e5;
  color: #fff;
}

/* ===== 搜索栏 ===== */
.search-bar {
  display: flex;
  justify-content: center;
  margin: 16px 0 20px;
  padding: 0 4px;
}

.search-bar input {
  width: 100%;
  max-width: 480px;
  padding: 12px 18px;
  border-radius: 24px;
  border: 1px solid #333;
  background: #1a1a1a;
  color: #fff;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
  /* iOS 不自动缩放 */
  font-size: 16px;
}

.search-bar input:focus {
  border-color: #4f46e5;
}

.search-bar input::placeholder {
  color: #555;
}

/* ===== 图片网格 ===== */
.wallpaper-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.wallpaper-card {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  background: #1a1a1a;
  aspect-ratio: 9 / 16;
  transition: transform 0.15s, box-shadow 0.15s;
  /* 触控反馈 */
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
}

.wallpaper-card:active {
  transform: scale(0.97);
}

.wallpaper-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s;
}

.wallpaper-card:hover img {
  transform: scale(1.05);
}

.wallpaper-card .card-label {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: rgba(0, 0, 0, 0.7);
  color: #ccc;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 10px;
  pointer-events: none;
}

.wallpaper-card .card-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 10px;
  font-weight: 600;
  pointer-events: none;
}

.badge-free {
  background: #22c55e;
  color: #000;
}

.badge-points {
  background: #f59e0b;
  color: #000;
}

/* ===== 加载更多按钮 ===== */
.load-more-wrap {
  text-align: center;
  margin-top: 32px;
}

.load-more {
  padding: 14px 40px;
  border-radius: 24px;
  border: 1px solid #333;
  background: #1a1a1a;
  color: #fff;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 48px;
}

.load-more:hover {
  background: #4f46e5;
  border-color: #4f46e5;
}

/* ===== 底部 ===== */
.footer {
  text-align: center;
  padding: 32px 16px;
  border-top: 1px solid #222;
  color: #555;
  font-size: 12px;
  line-height: 1.6;
}

/* ===== 图片放大弹窗 ===== */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.95);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.lightbox.show {
  display: flex;
}

.lightbox-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(255,255,255,0.1);
  border: none;
  color: #fff;
  font-size: 20px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
}

.lightbox-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.lightbox-content img {
  max-width: 94vw;
  max-height: 65vh;
  border-radius: 8px;
  object-fit: contain;
}

.lightbox-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.lightbox-res {
  color: #888;
  font-size: 13px;
}

.btn-download {
  padding: 12px 28px;
  border-radius: 24px;
  border: none;
  background: #4f46e5;
  color: #fff;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.2s;
  min-height: 48px;
  min-width: 120px;
}

.btn-download:hover {
  background: #6366f1;
}

.btn-set-wallpaper {
  padding: 12px 28px;
  border-radius: 24px;
  border: 1px solid #4f46e5;
  background: transparent;
  color: #4f46e5;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s;
  min-height: 48px;
}

.btn-set-wallpaper:hover {
  background: #4f46e5;
  color: #fff;
}

/* ===== 积分提示弹窗 ===== */
.points-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #4f46e5;
  color: #fff;
  padding: 12px 24px;
  border-radius: 24px;
  font-size: 14px;
  z-index: 300;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}

.points-toast.show {
  opacity: 1;
}

/* ===== 768px 以下（平板竖屏和手机） ===== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 24px;
  }

  .hero p {
    font-size: 13px;
  }

  .nav {
    display: none;
    width: 100%;
  }

  .nav.open {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
    padding-top: 4px;
  }

  .nav.open .nav-link {
    font-size: 12px;
    padding: 7px 12px;
    min-height: 34px;
  }

  .menu-toggle {
    display: block;
  }

  .section-tabs {
    max-width: 100%;
    margin: 16px 4px 4px;
    gap: 2px;
  }

  .section-tab {
    font-size: 12px;
    padding: 9px 4px;
  }

  .wallpaper-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .wallpaper-card {
    border-radius: 8px;
  }

  .wallpaper-card .card-label {
    font-size: 10px;
    bottom: 6px;
    left: 6px;
    padding: 3px 8px;
  }

  .lightbox-close {
    top: 8px;
    right: 8px;
  }

  .lightbox-content img {
    max-width: 96vw;
    max-height: 55vh;
  }

  .btn-download,
  .btn-set-wallpaper {
    width: 100%;
    max-width: 200px;
  }
}

/* ===== 480px 以下（小手机） ===== */
@media (max-width: 480px) {
  .header-inner {
    padding: 10px 12px;
  }

  .logo {
    font-size: 18px;
  }

  .main {
    padding: 12px 8px 80px;
  }

  .hero {
    padding: 16px 0 8px;
  }

  .hero h1 {
    font-size: 22px;
  }

  .wallpaper-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
  }

  .lightbox-content img {
    max-height: 50vh;
  }

  .lightbox-actions {
    flex-direction: column;
    gap: 8px;
  }

  .btn-download,
  .btn-set-wallpaper {
    max-width: 240px;
  }
}