/* ========================================
   软件分享站 - 样式表
   主题：淡蓝色 / 简洁直观
   ======================================== */

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

:root {
  --blue-50:  #e3f2fd;
  --blue-100: #bbdefb;
  --blue-200: #90caf9;
  --blue-300: #64b5f6;
  --blue-400: #42a5f5;
  --blue-500: #2196f3;
  --blue-600: #1e88e5;
  --blue-700: #1976d2;
  --green:    #00b578;
  --orange:   #ff9800;
  --indigo:   #4e6ef2;
  --gray-50:  #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #eee;
  --gray-300: #e0e0e0;
  --gray-400: #ccc;
  --gray-500: #9e9e9e;
  --gray-700: #616161;
  --gray-900: #212121;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-hover: 0 6px 24px rgba(33,150,243,0.13);
  --transition: 0.2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: #f0f5fa;
  color: var(--gray-900);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container { max-width: 1150px; margin: 0 auto; padding: 0 20px; }

/* --- 顶部 --- */
.header {
  background: linear-gradient(135deg, var(--blue-500), var(--blue-600));
  color: #fff;
  padding: 32px 0 28px;
  text-align: center;
  box-shadow: 0 2px 20px rgba(33,150,243,0.2);
}

.logo {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 6px;
}

.subtitle {
  font-size: 0.9rem;
  opacity: 0.85;
}

/* --- 搜索区 --- */
.search-section {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.search-box {
  display: flex;
  max-width: 540px;
  margin: 0 auto;
  position: relative;
}

.search-input {
  flex: 1;
  padding: 12px 42px 12px 18px;
  font-size: 1rem;
  border: 2px solid var(--gray-300);
  border-radius: 24px;
  outline: none;
  transition: border-color var(--transition);
  background: var(--gray-50);
}

.search-input:focus {
  border-color: var(--blue-400);
  background: #fff;
}

.search-clear {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--gray-500);
  font-size: 1.1rem;
  cursor: pointer;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.search-clear:hover { background: var(--gray-200); }
.search-clear.visible { display: flex; }

/* --- 分类筛选 --- */
.filter-section { padding: 18px 0 0; }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cat-btn {
  padding: 6px 16px;
  font-size: 0.85rem;
  border: 2px solid var(--gray-300);
  border-radius: 20px;
  background: #fff;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--gray-700);
  font-weight: 500;
  white-space: nowrap;
}

.cat-btn:hover { border-color: var(--blue-300); color: var(--blue-500); }
.cat-btn.active { background: var(--blue-500); color: #fff; border-color: var(--blue-500); }

.result-count {
  font-size: 0.85rem;
  color: var(--gray-500);
  white-space: nowrap;
}

/* --- 软件卡片网格 --- */
.main { flex: 1; padding: 22px 0 40px; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

/* --- 卡片 --- */
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid transparent;
  transition: all var(--transition);
  overflow: hidden;
}

.card:hover { box-shadow: var(--shadow-hover); border-color: var(--blue-100); }

.card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 18px 16px;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
}

.card-header:hover { background: var(--gray-50); }

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  background: var(--blue-50);
  flex-shrink: 0;
  overflow: hidden;
}

.card-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.card-info { flex: 1; min-width: 0; }

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 3px;
  font-size: 0.75rem;
  color: var(--gray-500);
}

.card-cat-tag {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.7rem;
  background: var(--blue-50);
  color: var(--blue-600);
  border-radius: 8px;
}

.card-arrow {
  font-size: 0.8rem;
  color: var(--gray-400);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.card.expanded .card-arrow { transform: rotate(180deg); color: var(--blue-400); }
.card.expanded { border-color: var(--blue-200); }

/* --- 版本列表（展开区） --- */
.version-list {
  display: none;
  border-top: 1px solid var(--gray-100);
  background: var(--gray-50);
  padding: 6px 0;
}

.card.expanded .version-list { display: block; }

.version-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--gray-100);
  flex-wrap: wrap;
}

.version-item:last-child { border-bottom: none; }

.version-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--gray-900);
  white-space: nowrap;
}

.version-links {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.dl-btn {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 5px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition);
  color: #fff;
}

.dl-btn:hover { transform: translateY(-1px); box-shadow: 0 3px 10px rgba(0,0,0,0.15); }

.dl-btn.xun   { background: #2196f3; }  /* 迅雷蓝 */
.dl-btn.kuake { background: #00b578; }  /* 夸克绿 */
.dl-btn.baidu { background: #4e6ef2; }  /* 百度靛 */
.dl-btn.tutorial { background: var(--orange); }  /* 教程橙 */

/* --- 空状态 --- */
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--gray-500);
}
.empty-icon { font-size: 4rem; margin-bottom: 16px; }
.empty-state p { font-size: 1.1rem; font-weight: 600; }
.empty-hint { font-size: 0.9rem !important; font-weight: 400 !important; color: var(--gray-500); margin-top: 6px; }

/* --- 分页 --- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: 10px 20px 40px;
  flex-wrap: wrap;
}

.page-btn {
  width: 38px; height: 38px;
  border: 2px solid var(--gray-300); border-radius: 10px;
  background: #fff; cursor: pointer;
  font-size: 0.85rem; font-weight: 500;
  color: var(--gray-700);
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
}

.page-btn:hover:not(.active):not(:disabled) { border-color: var(--blue-300); color: var(--blue-500); }
.page-btn.active { background: var(--blue-500); color: #fff; border-color: var(--blue-500); }
.page-btn:disabled { opacity: 0.35; cursor: default; }
.page-ellipsis { width: 38px; text-align: center; color: var(--gray-500); }

/* --- 页脚 --- */
.footer {
  background: #fff;
  border-top: 1px solid var(--gray-200);
  padding: 18px 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* ========================================
   响应式 — 手机端适配
   ======================================== */

@media (max-width: 768px) {
  .logo { font-size: 1.4rem; }
  .header { padding: 22px 0 18px; }

  .search-input { font-size: 0.9rem; padding: 10px 38px 10px 16px; }

  .card-grid { grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 10px; }
  .card-header { padding: 14px; gap: 10px; }
  .card-icon { width: 36px; height: 36px; font-size: 1.3rem; }
  .card-title { font-size: 0.9rem; }

  .version-item { padding: 8px 14px; }
  .version-name { font-size: 0.8rem; }
  .dl-btn { padding: 4px 10px; font-size: 0.7rem; }
}

@media (max-width: 420px) {
  .card-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .cat-btn { padding: 5px 12px; font-size: 0.78rem; }
}