/* ============================================================
   主页专用样式
   作用域：.home-page（仅对主页生效，不影响其他页面）
   ============================================================ */

/* ---------- 重置主页容器，撑满全宽 ---------- */
.home-page {
  width: 100%;
  overflow-x: hidden;
}

/* ---------- Hero Section ---------- */
.home-hero {
  position: relative;
  width: 100%;
  height: 100vh; /* 导航栏和页脚已隐藏，直接全屏 */
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--md-default-bg-color);
}

/* Canvas 固定定位，铺满全屏视口 */
#home-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
}

/* 文字层，z-index 高于 Canvas */
.home-hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 1.5rem;
}

/* 主标题：渐变色 */
.home-hero__title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #1391fc, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 副标题 */
.home-hero__subtitle {
  font-size: 1rem;
  letter-spacing: 0.3em;
  opacity: 0.75;
  margin-bottom: 2rem;
  /* 覆盖 custom.css 中 article > p 的首行缩进 */
  text-indent: 0 !important;
}

/* CTA 按钮组 */
.home-hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* 按钮基础 */
.home-btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.25s ease;
  cursor: pointer;
}

/* 实色主按钮 */
.home-btn--primary {
  background: #1391fc;
  color: #fff !important;
  border: 2px solid #1391fc;
}
.home-btn--primary:hover {
  background: #0d72cc;
  border-color: #0d72cc;
  box-shadow: 0 0 16px rgba(19, 145, 252, 0.5);
  transform: translateY(-1px);
}

/* 描边次按钮 */
.home-btn--outline {
  background: transparent;
  color: #1391fc !important;
  border: 2px solid #1391fc;
}
.home-btn--outline:hover {
  background: #1391fc;
  color: #fff !important;
  transform: translateY(-1px);
}

/* 向下箭头提示 */
.home-hero__scroll-hint {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 1.2rem;
  opacity: 0.4;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ---------- 响应式：移动端 ---------- */
@media (max-width: 767px) {
  .home-hero {
    height: 70vh;
  }
  .home-hero__title {
    font-size: 1.6rem;
  }
  .home-hero__subtitle {
    font-size: 0.875rem;
    letter-spacing: 0.15em;
  }
  .home-btn {
    width: 100%;
    text-align: center;
  }
  .home-hero__actions {
    flex-direction: column;
    align-items: center;
  }
}

/* ---------- 浅色模式微调 ---------- */
[data-md-color-scheme="default"] .home-hero {
  background: #f8faff;
}

/* ============================================================
   卡片区
   ============================================================ */

.home-cards {
  position: relative;
  z-index: 1;
  padding: 4rem 2rem 5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.home-cards__header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.home-cards__title {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  /* 覆盖 custom.css 中 h2 的蓝色和计数器 */
  counter-increment: none !important;
  color: inherit !important;
}

/* 覆盖 custom.css 的 h2::before 计数器内容 */
.home-cards .home-cards__title::before {
  content: '' !important;
}

/* 覆盖 custom.css 的 h2::after 装饰线 */
.home-cards .home-cards__title::after {
  display: none !important;
}

.home-cards__subtitle {
  font-size: 0.9rem;
  letter-spacing: 0.2em;
  opacity: 0.6;
  text-indent: 0 !important;
}

/* 卡片网格 */
.home-cards__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

/* 单张卡片 */
.home-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  border-radius: 10px;
  text-decoration: none !important;
  border: 1px solid rgba(19, 145, 252, 0.15);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
}

.home-card:hover {
  transform: translateY(-4px);
  border-color: rgba(19, 145, 252, 0.5);
  box-shadow: 0 8px 24px rgba(19, 145, 252, 0.15);
}

/* 顶部装饰线（各卡片颜色略有差异） */
.home-card__top-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: 10px 10px 0 0;
}

.home-card--java      .home-card__top-line { background: linear-gradient(90deg, #f89820, #e76f00); }
.home-card--frontend  .home-card__top-line { background: linear-gradient(90deg, #61dafb, #0070f3); }
.home-card--security  .home-card__top-line { background: linear-gradient(90deg, #ff6b6b, #c0392b); }
.home-card--topic     .home-card__top-line { background: linear-gradient(90deg, #a29bfe, #6c5ce7); }
.home-card--math      .home-card__top-line { background: linear-gradient(90deg, #55efc4, #00b894); }
.home-card--english   .home-card__top-line { background: linear-gradient(90deg, #fdcb6e, #e17055); }

/* 卡片图标 */
.home-card__icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  line-height: 1;
}

/* 卡片标题 */
.home-card__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--md-typeset-color) !important;
  /* 覆盖 custom.css h3 样式 */
  counter-increment: none !important;
}

.home-card .home-card__title::before,
.home-card .home-card__title::after {
  content: '' !important;
  display: none !important;
}

/* 子主题标签 */
.home-card__tags {
  font-size: 0.8rem;
  opacity: 0.6;
  margin: 0 0 1rem;
  line-height: 1.6;
  flex: 1;
  text-indent: 0 !important;
}

/* 查看链接 */
.home-card__link {
  font-size: 0.85rem;
  color: #1391fc;
  font-weight: 500;
  transition: color 0.2s;
}

.home-card:hover .home-card__link {
  color: #00d4ff;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1023px) {
  .home-cards__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 767px) {
  .home-cards {
    padding: 2.5rem 1rem 3rem;
  }
  .home-cards__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  .home-card {
    padding: 1.25rem 1rem;
  }
}

/* ---------- 浅色模式微调 ---------- */
[data-md-color-scheme="default"] .home-card {
  background: rgba(0, 0, 0, 0.02);
  border-color: rgba(0, 0, 0, 0.08);
}

[data-md-color-scheme="default"] .home-card:hover {
  border-color: rgba(19, 145, 252, 0.4);
  box-shadow: 0 8px 24px rgba(19, 145, 252, 0.1);
}