/* ===== 学虎教育 · 平台首页 ===== */
.home-page { padding-top: 26px; }

/* ===== Hero（紧凑版，缩小30%） ===== */
.home-hero {
  position: relative;
  text-align: center;
  padding: 30px 20px 26px;
  max-width: 1060px;
  margin: 0 auto;
  border-radius: 24px;
  background:
    radial-gradient(1000px 320px at 50% -90px, rgba(45, 107, 255, 0.14), transparent 70%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.75), rgba(255, 255, 255, 0.4));
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  box-shadow: var(--shadow), var(--glass-highlight);
}
.home-hero h1 {
  font-size: 25px;
  font-weight: 750;
  letter-spacing: 1px;
  color: var(--text);
  background: linear-gradient(120deg, #1f56e6, #4d8dff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.home-hero p { margin-top: 5px; color: var(--text-2); font-size: 13.5px; }

/* 统计条（紧凑） */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 17px;
}
.hero-stat b {
  display: block;
  font-size: 23px;
  font-weight: 800;
  color: var(--brand-blue-deep, #0b6fe0);
  letter-spacing: 0.5px;
  line-height: 1.1;
}
.hero-stat span { display: block; margin-top: 2px; font-size: 12px; color: var(--text-2); }

/* 搜索框（紧凑） */
.home-search {
  position: relative;
  max-width: 520px;
  margin: 18px auto 0;
}
.home-search > svg {
  position: absolute;
  left: 17px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-3);
  pointer-events: none;
}
#search-input {
  width: 100%;
  padding: 11px 18px 11px 45px;
  border: 1.5px solid rgba(24, 134, 253, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-size: 14px;
  color: var(--text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
#search-input:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 8px 24px rgba(24, 134, 253, 0.18);
}
#search-input::placeholder { color: var(--text-3); }

.search-results {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  right: 0;
  z-index: 50;
  max-height: 380px;
  overflow-y: auto;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  box-shadow: 0 18px 44px rgba(24, 80, 150, 0.18);
  text-align: left;
}
.search-result-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  cursor: pointer;
  transition: background 0.15s;
}
.search-result-item:hover { background: rgba(45, 107, 255, 0.06); }
.search-result-item .sr-tag {
  flex: none;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
}
.sr-tag.course { background: linear-gradient(135deg, #2d6bff, #5d8bff); }
.sr-tag.sim { background: linear-gradient(135deg, #ff8a00, #ffb25c); }
.sr-tag.tool { background: linear-gradient(135deg, #0ea5a5, #34d3c3); }
.search-result-item .sr-title {
  flex: 1;
  min-width: 0;
  font-size: 14px;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.search-result-item .sr-subj { flex: none; font-size: 12px; color: var(--text-3); }
.search-empty {
  padding: 18px;
  text-align: center;
  font-size: 13px;
  color: var(--text-3);
}

/* ===== 分类卡片（纵向大卡片，更高） ===== */
.home-cats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
  max-width: 1060px;
  margin: 22px auto 0;
  align-items: stretch;
}

.cat-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  padding: 30px 28px 28px;
  min-height: 280px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.45));
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: 0 14px 36px rgba(24, 80, 150, 0.1), var(--glass-highlight);
  text-decoration: none;
  color: inherit;
  transition: transform 0.22s var(--ease, ease), box-shadow 0.22s;
  overflow: hidden;
}
.cat-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 22px 48px rgba(24, 80, 150, 0.18), var(--glass-highlight);
}
.cat-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.7), transparent);
  opacity: 0.5;
}

.cat-card .cat-icon {
  flex: none;
  width: 74px;
  height: 74px;
  display: grid;
  place-items: center;
  border-radius: 20px;
  color: #fff;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.12);
}
.cat-card .cat-icon svg { width: 34px; height: 34px; }
.cat-card.course .cat-icon { background: linear-gradient(135deg, #2d6bff, #5d8bff); }
.cat-card.sim .cat-icon { background: linear-gradient(135deg, #ff8a00, #ffb25c); }
.cat-card.explore .cat-icon { background: linear-gradient(135deg, #0ea5a5, #34d3c3); }

.cat-card .cat-body { flex: 1; min-width: 0; display: flex; flex-direction: column; width: 100%; }
.cat-card .cat-name { display: block; font-size: 21px; font-weight: 750; color: var(--text); }
.cat-card .cat-desc { display: block; margin-top: 6px; font-size: 13px; color: var(--text-2); line-height: 1.6; }

/* 底部 CTA */
.cat-card .cat-cta {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s, box-shadow 0.2s;
}
.cat-card.course .cat-cta { background: linear-gradient(135deg, #2d6bff, #5d8bff); }
.cat-card.sim .cat-cta { background: linear-gradient(135deg, #ff8a00, #ffb25c); }
.cat-card.explore .cat-cta { background: linear-gradient(135deg, #0ea5a5, #34d3c3); }
.cat-card:hover .cat-cta {
  transform: translateX(3px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16);
}
.cat-card .cat-cta::after { content: "→"; font-size: 15px; }

/* 学科快捷入口 */
.cat-subjects {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
  align-content: flex-start;
}
.cat-chip {
  padding: 4px 12px;
  border: 1px solid rgba(45, 107, 255, 0.2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
  color: var(--brand-blue-deep, #0b6fe0);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.18s;
}
.cat-chip:hover {
  background: var(--brand-blue);
  border-color: var(--brand-blue);
  color: #fff;
}
.cat-card .cat-subjects:empty { display: none; }

/* ===== 精选推荐 ===== */
.home-fresh {
  max-width: 1060px;
  margin: 44px auto 0;
}
.fresh-head h2 {
  font-size: 22px;
  font-weight: 750;
  color: var(--text);
}
.fresh-head p { margin-top: 4px; font-size: 13px; color: var(--text-2); }
.fresh-section { margin-top: 26px; }
.fresh-section h3 {
  display: flex;
  align-items: center;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  padding-left: 0;
  border-left: none;
}
.fresh-h3 .fresh-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 8px;
}
.fresh-h3.sim .fresh-dot { background: linear-gradient(135deg, #ff8a00, #ffb25c); }
.fresh-h3.course .fresh-dot { background: linear-gradient(135deg, #2d6bff, #5d8bff); }
.fresh-more {
  margin-left: auto;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--brand-blue-deep, #0b6fe0);
  text-decoration: none;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(45, 107, 255, 0.07);
  transition: background 0.18s;
}
.fresh-more:hover { background: rgba(45, 107, 255, 0.14); }
.fresh-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.fresh-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.38));
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow), var(--glass-highlight);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}
.fresh-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.fresh-card .fresh-thumb-wrap {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.5), rgba(220, 235, 255, 0.35));
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
}
.fresh-card .fresh-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s;
}
.fresh-card:hover .fresh-thumb { transform: scale(1.05); }
.fresh-card .fresh-thumb-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 30px;
  color: #9db8d8;
}
.fresh-card .fresh-body { padding: 11px 13px 13px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.fresh-card .fresh-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.fresh-card .fresh-meta {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11.5px;
  color: var(--text-3);
}
.fresh-card .fresh-tag {
  padding: 2px 9px;
  border-radius: 6px;
  background: var(--brand-blue-soft);
  color: var(--brand-blue-deep);
  font-size: 11px;
}
.fresh-card .fresh-tag.orange { background: var(--brand-orange-soft); color: #d97100; }

@media (max-width: 860px) {
  .home-cats { grid-template-columns: 1fr; }
  .hero-stats { gap: 26px; }
  .fresh-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .home-page { padding-top: 14px; }
  .home-hero { padding: 20px 14px 18px; border-radius: 20px; margin: 0 12px; max-width: none; }
  .home-hero h1 { font-size: 21px; letter-spacing: 0.5px; }
  .home-hero p { font-size: 12.5px; }

  .hero-stats { gap: 0; margin-top: 14px; justify-content: space-around; }
  .hero-stat b { font-size: 20px; }
  .hero-stat span { font-size: 11px; }

  .home-search { margin: 14px 0 0; }
  #search-input { padding: 10px 14px 10px 40px; font-size: 13.5px; }

  .home-cats { gap: 12px; margin: 14px auto 0; max-width: none; padding: 0 12px; }
  .cat-card {
    flex-direction: row;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    min-height: 0;
    border-radius: 18px;
  }
  .cat-card .cat-icon { width: 48px; height: 48px; border-radius: 14px; }
  .cat-card .cat-icon svg { width: 24px; height: 24px; }
  .cat-card .cat-body { flex-direction: row; align-items: center; gap: 8px; }
  .cat-card .cat-name { font-size: 16.5px; font-weight: 700; }
  .cat-card .cat-desc { display: none; }
  .cat-card .cat-cta { margin-left: auto; padding: 7px 14px; font-size: 12px; flex: none; min-width: 0; }
  .cat-card .cat-subjects { display: none; }
  .cat-card::after { display: none; }
  .cat-card:hover { transform: translateY(-2px); }

  .home-fresh { margin-top: 30px; padding: 0 12px; }
  .fresh-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .fresh-head h2 { font-size: 17px; }
  .fresh-card .fresh-body { padding: 8px 9px 10px; gap: 4px; }
  .fresh-card .fresh-title { font-size: 13px; -webkit-line-clamp: 2; }
  .fresh-card .fresh-meta { font-size: 11px; }
}

/* ===== 首页入场动画 ===== */
@keyframes rise-in {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}
@keyframes hero-child-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

.home-hero { animation: rise-in 0.55s var(--ease, ease) both; }

.home-hero h1 { animation: hero-child-in 0.5s var(--ease, ease) 0.1s both; }
.home-hero p { animation: hero-child-in 0.5s var(--ease, ease) 0.2s both; }
.hero-stats { animation: hero-child-in 0.5s var(--ease, ease) 0.3s both; }
.home-search { animation: hero-child-in 0.5s var(--ease, ease) 0.42s both; }

.home-cats .cat-card {
  animation: rise-in 0.5s var(--ease, ease) both;
}
.home-cats .cat-card:nth-child(1) { animation-delay: 0.5s; }
.home-cats .cat-card:nth-child(2) { animation-delay: 0.62s; }
.home-cats .cat-card:nth-child(3) { animation-delay: 0.74s; }

.home-fresh { animation: rise-in 0.5s var(--ease, ease) 0.95s both; }
.fresh-grid .fresh-card {
  animation: rise-in 0.4s var(--ease, ease) both;
}
.fresh-grid .fresh-card:nth-child(1) { animation-delay: 1.05s; }
.fresh-grid .fresh-card:nth-child(2) { animation-delay: 1.13s; }
.fresh-grid .fresh-card:nth-child(3) { animation-delay: 1.21s; }
.fresh-grid .fresh-card:nth-child(4) { animation-delay: 1.29s; }

@media (prefers-reduced-motion: reduce) {
  .home-hero,
  .home-hero h1,
  .home-hero p,
  .hero-stats,
  .home-search,
  .home-cats .cat-card,
  .home-fresh,
  .fresh-grid .fresh-card {
    animation: none;
  }
}