/* ========== 第一屏：全屏 Hero 区域 ========== */
.hero-fullscreen {
  position: relative;
  width: 100%;
  height: 100vh;        /* 完整占满一屏 */
  min-height: 600px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  /* 防止 View Transition 时撑开页面 */
  contain: layout;
}

/* 背景图 */
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('../../images/hero-bg.jpg') center/cover no-repeat;
  opacity: 0.35;
  z-index: 0;
  /* 底部向下渐隐，过渡到下面的内容区 */
  mask-image: linear-gradient(to bottom, black 55%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 55%, transparent 100%);
  transition: opacity 0.6s;
  will-change: transform;
}

/* 中央文案 */
.hero-center {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding: 0 2rem;
}

/* 小标签 */
.hero-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.35em;
  color: var(--secondary);
  background: rgba(14, 165, 233, 0.12);
  border: 1px solid rgba(14, 165, 233, 0.35);
  padding: 6px 20px;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 2rem;
  animation: fadeSlideDown 0.8s 0.1s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

/* 主标题 */
.hero-title {
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 900;
  line-height: 1.12;
  margin-bottom: 1.5rem;
  /* 渐变文字 */
  background: linear-gradient(135deg, #f8fafc 0%, var(--secondary) 50%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: titleHeroIn 1s 0.2s cubic-bezier(0.2, 0.8, 0.2, 1) both;
  /* 多重文字光晕 */
  filter: drop-shadow(0 0 40px rgba(14, 165, 233, 0.3));
}

/* 描述 */
.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  line-height: 1.8;
  animation: fadeSlideUp 0.9s 0.4s cubic-bezier(0.2, 0.8, 0.2, 1) both;
  max-width: 550px;
  margin: 0 auto;
}

/* 向下滚动提示 */
.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  animation: fadeSlideUp 1s 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) both;
  /* 鼠标悬停后该区域透明度过渡 */
  transition: opacity 0.3s;
  opacity: 0.7;
}
.hero-scroll-hint:hover { opacity: 1; }

.scroll-hint-text {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  font-weight: 600;
}

.scroll-hint-arrow {
  width: 36px;
  height: 36px;
  border: 1.5px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  animation: bounceArrow 1.8s ease-in-out infinite;
}
.scroll-hint-arrow svg { width: 18px; height: 18px; }

/* Hero 入场动画 */
@keyframes titleHeroIn {
  from { opacity: 0; transform: scale(0.88) translateY(-25px); filter: drop-shadow(0 0 0 transparent) blur(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); filter: drop-shadow(0 0 40px rgba(14, 165, 233, 0.3)); }
}
@keyframes fadeSlideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes bounceArrow {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(6px); }
}


/* ========== 第二屏：精选文章横向卡片区 ========== */
.featured-section {
  padding: 4rem 0 3rem;
  overflow: hidden;            /* 对外隐藏，内部 track 可以溢出 */
  /* 顶部边框呼应 Hero 底部 */
  border-top: 1px solid var(--glass-border);
}

.featured-header {
  max-width: 1400px;
  width: 92%;
  margin: 0 auto 2rem auto;
}
.featured-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0.4rem;
}
.featured-title-icon {
  color: var(--primary);
  font-style: normal;
}
.featured-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* 轨道外层：用于定位左右箭头 */
.featured-track-wrap {
  position: relative;
  max-width: 1400px;
  width: 92%;
  margin: 0 auto;
}

/* 实际横向滚动区 */
.featured-track {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  overflow-y: visible;
  scroll-behavior: smooth;
  /* 隐藏滚动条，但保留功能 */
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 0.5rem 0.5rem 1.2rem; /* 留出卡片悬停阴影空间 */
  /* 防止子元素被截断 */
  align-items: stretch;
}
.featured-track::-webkit-scrollbar { display: none; }

/* 每张精选卡片 */
.featured-card {
  position: relative;
  flex: 0 0 calc(25% - 1.15rem); /* 一行展示4张 */
  min-width: 260px;
  height: 340px;
  border-radius: 20px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  text-decoration: none;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1),
              box-shadow 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
  /* 增加生成展示入场动画 */
  opacity: 0;
}
.featured-card.animate-in {
  animation: index-card-enter 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}
.featured-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45), 0 0 20px rgba(14, 165, 233, 0.2);
}

/* 遮罩层 */
.featured-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.88) 0%,
    rgba(0, 0, 0, 0.4) 50%,
    rgba(0, 0, 0, 0.05) 100%
  );
  transition: background 0.4s;
}
.featured-card:hover .featured-card-overlay {
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.92) 0%,
    rgba(14, 165, 233, 0.15) 55%,
    rgba(0, 0, 0, 0.05) 100%
  );
}

/* 卡片内容 */
.featured-card-body {
  position: relative;
  z-index: 2;
  padding: 1.4rem;
  transform: translateY(8px);
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.featured-card:hover .featured-card-body {
  transform: translateY(0);
}

.featured-card-tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  background: var(--primary);
  color: #fff;
  padding: 3px 10px;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 0.6rem;
}

.featured-card-title {
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.featured-card-excerpt {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.65);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.8rem;
  /* 默认隐藏，悬停时显示 */
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s 0.05s, transform 0.3s 0.05s;
}
.featured-card:hover .featured-card-excerpt {
  opacity: 1;
  transform: translateY(0);
}

.featured-card-meta {
  display: flex;
  gap: 10px;
  font-size: 0.76rem;
  color: rgba(255, 255, 255, 0.45);
  align-items: center;
}

/* 左右箭头按钮 */
.featured-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  /* 默认隐藏，hover 轨道时显示 */
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s, background 0.3s, left 0.3s, right 0.3s;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}
.featured-arrow svg { width: 22px; height: 22px; }

.featured-arrow-left {
  left: -18px;
}
.featured-arrow-right {
  right: -18px;
}

/* 轨道悬停区域时显示箭头 */
.featured-track-wrap:hover .featured-arrow {
  opacity: 1;
  pointer-events: auto;
}
.featured-track-wrap:hover .featured-arrow-left {
  left: -24px;
}
.featured-track-wrap:hover .featured-arrow-right {
  right: -24px;
}
.featured-arrow:hover {
  background: var(--secondary);
  color: #fff;
  border-color: var(--secondary);
  box-shadow: 0 0 20px var(--secondary-glow);
  transform: translateY(-50%) scale(1.08);
}


/* ========== 系统推荐板块 ========== */
.recommend-section {
  padding: 3rem 0 3rem;
  overflow: hidden;
  border-top: 1px solid var(--glass-border);
}

.recommend-header {
  max-width: 1400px;
  width: 92%;
  margin: 0 auto 2rem auto;
}
.recommend-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0.4rem;
}
.recommend-title-icon {
  color: #a855f7;
  font-style: normal;
  filter: drop-shadow(0 0 6px rgba(168, 85, 247, 0.4));
}
.recommend-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* 轨道外层 */
.recommend-track-wrap {
  position: relative;
  max-width: 1400px;
  width: 92%;
  margin: 0 auto;
}

/* 横向滚动区 */
.recommend-track {
  display: flex;
  gap: 1.5rem;
  overflow-x: auto;
  overflow-y: visible;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 0.5rem 0.5rem 1.2rem;
  align-items: stretch;
}
.recommend-track::-webkit-scrollbar { display: none; }

/* 推荐卡片 */
.recommend-card {
  position: relative;
  flex: 0 0 calc(25% - 1.15rem);
  min-width: 260px;
  height: 340px;
  border-radius: 20px;
  overflow: hidden;
  background-size: cover;
  background-position: center;
  text-decoration: none;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1),
              box-shadow 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
  /* 增加生成展示入场动画 */
  opacity: 0;
}
.recommend-card.animate-in {
  animation: index-card-enter 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}
.recommend-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45), 0 0 24px rgba(168, 85, 247, 0.3);
}

@keyframes index-card-enter {
  0% {
    opacity: 0;
    transform: translateY(30px) scale(0.98);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* 遮罩层 —— 紫色/洋红渐变 */
.recommend-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.88) 0%,
    rgba(0, 0, 0, 0.4) 50%,
    rgba(0, 0, 0, 0.05) 100%
  );
  transition: background 0.4s;
}
.recommend-card:hover .recommend-card-overlay {
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.92) 0%,
    rgba(168, 85, 247, 0.18) 55%,
    rgba(0, 0, 0, 0.05) 100%
  );
}

/* 卡片内容 */
.recommend-card-body {
  position: relative;
  z-index: 2;
  padding: 1.4rem;
  transform: translateY(8px);
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.recommend-card:hover .recommend-card-body {
  transform: translateY(0);
}

/* 热度标签 */
.recommend-card-heat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  background: linear-gradient(135deg, #a855f7, #ec4899);
  color: #fff;
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 0.5rem;
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.35);
}
.recommend-card-heat svg {
  stroke: currentColor;
  flex-shrink: 0;
}

.recommend-card-tag {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  background: rgba(168, 85, 247, 0.7);
  color: #fff;
  padding: 3px 10px;
  border-radius: 100px;
  display: inline-block;
  margin-bottom: 0.6rem;
  margin-left: 4px;
}

.recommend-card-title {
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.recommend-card-excerpt {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.65);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.8rem;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s 0.05s, transform 0.3s 0.05s;
}
.recommend-card:hover .recommend-card-excerpt {
  opacity: 1;
  transform: translateY(0);
}

.recommend-card-meta {
  display: flex;
  gap: 10px;
  font-size: 0.76rem;
  color: rgba(255, 255, 255, 0.45);
  align-items: center;
}

/* 左右箭头按钮 */
.recommend-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.3s, background 0.3s, left 0.3s, right 0.3s;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}
.recommend-arrow svg { width: 22px; height: 22px; }

.recommend-arrow-left { left: -18px; }
.recommend-arrow-right { right: -18px; }

.recommend-track-wrap:hover .recommend-arrow {
  opacity: 1;
  pointer-events: auto;
}
.recommend-track-wrap:hover .recommend-arrow-left { left: -24px; }
.recommend-track-wrap:hover .recommend-arrow-right { right: -24px; }
.recommend-arrow:hover {
  background: #a855f7;
  color: #fff;
  border-color: #a855f7;
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.4);
  transform: translateY(-50%) scale(1.08);
}


/* ========== 第三屏：主体容器（文章列表区） ========== */
.container {
  max-width: 1400px;
  width: 92%;
  margin: 4rem auto;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 2.5rem;
  align-items: start;
  box-sizing: border-box;
  overflow: hidden; /* 兜底防溢出 */
}

/* 文章区标题 */
.articles-section-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.articles-section-title {
  font-size: 1.5rem;
  font-weight: 800;
  white-space: nowrap;
  color: var(--text-main);
}
.articles-section-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--glass-border), transparent);
}

.sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  /* 初始隐藏，待文章区进入视口时通过 JS 追加 articles-anim-active 到父容器触发 */
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.3s cubic-bezier(0.2, 0.8, 0.2, 1),
              transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}
/* 和主内容区同步使用同一个激活类名 */
.articles-anim-active ~ .sidebar,
.container.articles-anim-active .sidebar {
  opacity: 1;
  transform: translateX(0);
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-60px); }
  to { opacity: 1; transform: translateX(0); }
}

.profile-card { text-align: center; }
.avatar {
  width: 100px; height: 100px; border-radius: 50%;
  margin: 0 auto 1.2rem auto;
  background: url('https://images.unsplash.com/photo-1544005313-94ddf0286df2?q=80&w=200&auto=format&fit=crop') center/cover;
  border: 3px solid var(--glass-border);
  transition: 0.3s;
}
.profile-card:hover .avatar { border-color: var(--primary); transform: rotate(5deg) scale(1.05); }
.profile-name { font-size: 1.3rem; font-weight: 800; margin-bottom: 0.3rem;}
.profile-bio { font-size: 0.9rem; color: var(--text-muted); }

.hot-item {
  font-size: 0.9rem; margin-bottom: 0.8rem; line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  transition: 0.3s;
}
.hot-item:hover { color: var(--secondary); }
.hot-meta { font-size: 0.75rem; color: var(--text-muted); display: block; margin-top: 4px; }

/* ========== 右侧主文区 ========== */
.main-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  min-width: 0; /* Grid 子项防溢出关键属性 */
  max-width: 100%;
  overflow: hidden;
  /* 动画初始状态：隐藏 */
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.3s cubic-bezier(0.2, 0.8, 0.2, 1),
              transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}
/* 当文章区可见时，触发入场 */
.main-content.articles-anim-active {
  opacity: 1;
  transform: translateX(0);
}

/* ========== 文章列表 ========== */
.article-list { display: flex; flex-direction: column; gap: 2rem; max-width: 100%; }

.article-item {
  display: flex;
  align-items: center;
  padding: 0;
  height: 180px;
  overflow: hidden;
  max-width: 100%; /* 防止溢出父容器 */
  box-sizing: border-box;
  /* 流式加载入场初始状态 */
  opacity: 0;
  transform: translateX(35px); 
  position: relative;
}
/* 已初始化可见的前两篇 */
.article-item.init-visible {
  opacity: 1;
  transform: translateX(0);
}

/* 流式入场动画 */
.scroll-anim {
  animation: scrollInRight 0.35s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}
@keyframes scrollInRight {
  from { opacity: 0; transform: translateX(35px) scale(0.97); }
  to { opacity: 1; transform: translateX(0) scale(1); }
}

.article-cover {
  width: 35%;
  height: 100%;
  position: relative;
  overflow: hidden;
}
.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease, opacity 0.4s ease;
}
/* 懒加载图片：未加载时显示占位图，加载完成后淡入 */
.article-cover img.lazy-img {
  opacity: 0.6;
  background-color: var(--glass-bg, #1a1a2e);
}
.article-cover img.lazy-img.lazy-loaded {
  opacity: 1;
}

/* 背景图懒加载：未加载时用渐变占位 */
.featured-card.lazy-bg:not([style*="background-image"]),
.recommend-card.lazy-bg:not([style*="background-image"]) {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}
/* 背景图加载后过渡显示 */
.featured-card.lazy-bg,
.recommend-card.lazy-bg {
  background-size: cover;
  background-position: center;
  transition: background-image 0s, transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1),
              box-shadow 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* 奇数行：默认左侧图片 */
.article-item:nth-child(odd) .article-cover::after {
  content: ''; position: absolute; right: 0; top: 0; bottom: 0; width: 30px;
  background: linear-gradient(to right, transparent, var(--glass-bg)); 
  pointer-events: none;
}
.article-item:nth-child(odd) .article-info {
  padding: 1.5rem 3.5rem 1.5rem 2rem; 
}
.article-item:nth-child(odd) .article-action-icon {
  right: -2rem; 
}
.article-item:nth-child(odd):hover .article-action-icon {
  right: 1.5rem; 
}
.article-item:nth-child(odd):hover .article-info {
  transform: translateX(8px);
}

/* 偶数行：反转排列 (右侧图片，左侧文字) */
.article-item:nth-child(even) {
  flex-direction: row-reverse;
}
.article-item:nth-child(even) .article-cover::after {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 30px;
  background: linear-gradient(to left, transparent, var(--glass-bg)); 
  pointer-events: none;
}
.article-item:nth-child(even) .article-info {
  padding: 1.5rem 2rem 1.5rem 3.5rem; 
  align-items: flex-end;
  text-align: right;
}
.article-item:nth-child(even) .article-meta {
  justify-content: flex-end;
}
.article-item:nth-child(even) .article-action-icon {
  right: auto;
  left: -2rem; 
}
.article-item:nth-child(even):hover .article-action-icon {
  left: 1.5rem; 
}
.article-item:nth-child(even):hover .article-info {
  transform: translateX(-8px);
}

.article-info {
  width: 65%;
  min-width: 0; /* Flex 子项防溢出 */
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: transform 0.4s ease;
  overflow-wrap: break-word;
  word-break: break-word;
}

.article-meta { font-size: 0.85rem; color: var(--secondary); font-weight: 600; margin-bottom: 0.5rem; display:flex; gap: 15px; }
.article-meta span { display: flex; align-items: center; gap: 4px; }

.article-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  line-height: 1.3;
  transition: color 0.3s;
  color: var(--text-main);
  width: fit-content;
  max-width: 100%;
  /* View Transition 性能优化：布局隔离 + GPU 合成提示 */
  contain: layout style;
  will-change: transform;
}
.article-excerpt { font-size: 0.95rem; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; word-break: break-word; overflow-wrap: break-word; }

.article-action-icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--secondary);
  opacity: 0;
  transition: 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  display: flex; align-items: center; justify-content: center;
  background: var(--glass-bg);
  border-radius: 50%;
  width: 40px; height: 40px;
  box-shadow: 0 0 10px var(--secondary-glow);
}

.article-item:hover {
  border-color: var(--secondary);
  background: var(--glass-bg-hover);
}
.article-item:hover .article-cover img {
  transform: scale(1.1) rotate(2deg);
}
.article-item:hover .article-title {
  color: var(--secondary);
}
.article-item:hover .article-action-icon { opacity: 1; }


/* ========== 滚动拦截遮罩（视觉引导层） ========== */
/* 当用户开始向下滚动时，Hero 底部显示一个吸引注意的"拦截"视觉提示 */
.hero-fullscreen.scroll-intercept::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, rgba(14, 165, 233, 0.08));
  z-index: 3;
  animation: pulseHint 0.6s ease-in-out;
  pointer-events: none;
}
@keyframes pulseHint {
  from { opacity: 0; }
  50%  { opacity: 1; }
  to   { opacity: 0; }
}


/* ========== 到底了标识 ========== */
.articles-end {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-bottom: 1rem;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.8s 0.3s ease, transform 0.8s 0.3s ease;
}
/* 主内容区激活后跟随显示 */
.main-content.articles-anim-active .articles-end {
  opacity: 1;
  transform: translateY(0);
}

.articles-end-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--glass-border), transparent);
}

.articles-end-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 20px;
  border-radius: 100px;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  white-space: nowrap;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.articles-end-icon {
  font-size: 0.65rem;
  color: var(--primary);
  opacity: 0.7;
}

.articles-end-text {
  letter-spacing: 0.05em;
}


/* ========== 响应式 ========== */
@media (max-width: 1200px) {
  .featured-card,
  .recommend-card {
    flex: 0 0 calc(33.33% - 1rem);
  }
}

@media (max-width: 1024px) {
  .container { grid-template-columns: 1fr; }
  .sidebar { position: static; display: grid; grid-template-columns: repeat(2, 1fr); min-width: 0; }
  .featured-card,
  .recommend-card {
    flex: 0 0 calc(50% - 0.75rem);
  }
}

@media (max-width: 768px) {
  .hero-title { font-size: clamp(2.2rem, 9vw, 4rem); }
  /* 容器在手机端全宽约束 */
  .container {
    width: 100%;
    padding: 0 0.8rem;
    box-sizing: border-box;
    margin: 2rem auto;
    gap: 1.5rem;
  }
  .sidebar { grid-template-columns: 1fr; }
  .article-item, .article-item:nth-child(even) {
    height: auto;
    flex-direction: column;
    max-width: 100%;
  }
  .article-cover { width: 100%; height: 180px; }
  .article-info, .article-item:nth-child(even) .article-info {
    width: 100%;
    padding: 1.2rem;
    align-items: flex-start;
    text-align: left;
    min-width: 0;
    box-sizing: border-box;
  }
  .article-item:nth-child(even) .article-meta { justify-content: flex-start; }
  .article-title {
    font-size: 1.15rem;
    width: auto;
    max-width: 100%;
  }
  .article-excerpt {
    font-size: 0.9rem;
  }
  .article-meta {
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.8rem;
  }
  /* 隐藏悬停箭头图标 */
  .article-action-icon { display: none; }
  /* 取消奇偶行的渐变遮罩（手机端纵向排列无需方向遮罩） */
  .article-item:nth-child(odd) .article-cover::after,
  .article-item:nth-child(even) .article-cover::after {
    display: none;
  }
  .featured-card,
  .recommend-card {
    flex: 0 0 80vw;
  }
  .featured-arrow,
  .recommend-arrow { display: none; }
}


/* ========================================================
   两列网格文章列表变体（用于分类/标签页）
   用法：给 .article-list 加上 article-list--grid 修饰类
======================================================== */
.article-list--grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.8rem;
}

/* 两列模式下的卡片重置为纵向 */
.article-list--grid .article-item,
.article-list--grid .article-item:nth-child(odd),
.article-list--grid .article-item:nth-child(even) {
  height: auto;
  flex-direction: column;
  overflow: hidden;
  transform: none;
}

/* 封面占满卡片顶部 */
.article-list--grid .article-cover {
  width: 100%;
  height: 195px;
  flex-shrink: 0;
  position: relative;
}

/* 取消奇偶渐变遮罩 */
.article-list--grid .article-item:nth-child(odd)  .article-cover::after,
.article-list--grid .article-item:nth-child(even) .article-cover::after {
  display: none;
}

/* 文字区域统一靠左 */
.article-list--grid .article-info,
.article-list--grid .article-item:nth-child(odd)  .article-info,
.article-list--grid .article-item:nth-child(even) .article-info {
  width: 100%;
  padding: 1.2rem 1.4rem 1.4rem;
  align-items: flex-start;
  text-align: left;
}

/* 元信息靠左 */
.article-list--grid .article-item:nth-child(even) .article-meta {
  justify-content: flex-start;
}

/* 箭头图标隐藏（卡片空间不足） */
.article-list--grid .article-action-icon {
  display: none;
}

/* 标题字号适配窄卡片 */
.article-list--grid .article-title {
  font-size: 1.1rem;
}

/* 悬停时取消横向位移 */
.article-list--grid .article-item:nth-child(odd):hover  .article-info,
.article-list--grid .article-item:nth-child(even):hover .article-info {
  transform: none;
}

/* 小屏退化为单列 */
@media (max-width: 700px) {
  .article-list--grid {
    grid-template-columns: 1fr;
  }
}