/* 茄子视频 · 短视频信息流布局
   单列居中 FEED + 内部多横向轨道，与以往多列/时间线/筛选布局区别明显 */
:root {
  --bg: #020617;
  --panel: #030712;
  --card: #020617;
  --border: #1f2937;
  --accent: #22c55e;   /* 茄子绿 */
  --accent-2: #a855f7; /* 茄子紫 */
  --accent-soft: rgba(34, 197, 94, 0.16);
  --text: #e5e7eb;
  --text-2: #9ca3af;
  --text-3: #6b7280;
  --radius: 14px;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(168, 85, 247, 0.22) 0, transparent 45%),
    radial-gradient(circle at bottom right, rgba(34, 197, 94, 0.18) 0, transparent 45%),
    #020617;
  color: var(--text);
  min-height: 100vh;
  line-height: 1.7;
}

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

/* 顶部导航：简洁品牌 + Tag 导航 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: linear-gradient(to bottom, rgba(15,23,42,0.96), rgba(15,23,42,0.9));
  border-bottom: 1px solid rgba(31,41,55,0.9);
}
.topbar-in {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0.7rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.logo {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  font-weight: 700;
  font-size: 1.12rem;
}
.logo span {
  font-size: 0.7rem;
  padding: 0.14rem 0.56rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
}
.nav {
  display: flex;
  gap: 0.6rem;
  font-size: 0.84rem;
}
.nav a {
  padding: 0.22rem 0.4rem;
  border-radius: 999px;
  color: var(--text-2);
}
.nav a.on {
  color: var(--accent-2);
}
.fill {
  flex: 1;
}
.search-mini {
  font-size: 0.76rem;
  color: var(--text-3);
}

/* 主体：单列居中信息流 */
.feed {
  max-width: 880px;
  margin: 0 auto;
  padding: 1.35rem 1.1rem 2.1rem;
}

/* 顶部简介块：简单说明关键词组合含义 */
.intro {
  background: radial-gradient(circle at top left, rgba(15,23,42,0.98) 0, rgba(15,23,42,0.99) 60%, rgba(15,23,42,0.99) 100%);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 1.1rem 1.2rem 1.3rem;
  box-shadow: 0 18px 40px rgba(15,23,42,0.95);
  margin-bottom: 1.25rem;
}
.intro h1 {
  font-size: 1.02rem;
  margin-bottom: 0.4rem;
}
.intro-sub {
  font-size: 0.82rem;
  color: var(--text-2);
  margin-bottom: 0.7rem;
}
.intro-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.76rem;
}
.intro-tags span {
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  border: 1px solid rgba(55,65,81,0.9);
  color: var(--text-3);
}

/* 信息流 Section：每块都是一个“内容卡带横向轨道” */
.section {
  background: rgba(15,23,42,0.98);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 0.9rem 1rem 1.1rem;
  margin-bottom: 1.1rem;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.55rem;
}
.section-head h2 {
  font-size: 0.9rem;
  font-weight: 600;
}
.section-head span {
  font-size: 0.78rem;
  color: var(--text-3);
}

/* 横向轨道：短视频卡片列表 */
.lane {
  display: flex;
  gap: 0.7rem;
  overflow-x: auto;
  padding-bottom: 0.35rem;
}
.lane::-webkit-scrollbar {
  height: 6px;
}
.lane::-webkit-scrollbar-thumb {
  background: rgba(55,65,81,0.9);
  border-radius: 999px;
}
.lane-card {
  flex: 0 0 170px;
  background: var(--card);
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  font-size: 0.78rem;
  color: var(--text-2);
}
.lane-thumb {
  width: 100%;
  height: 110px;
  overflow: hidden;
}
.lane-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.lane-body {
  padding: 0.5rem 0.55rem 0.6rem;
}
.lane-body h3 {
  font-size: 0.8rem;
  margin-bottom: 0.22rem;
  color: #e5e7eb;
}
.lane-body p {
  font-size: 0.72rem;
  color: var(--text-3);
}

/* 长文段落：首页 800-1200 字说明 */
.long-text {
  margin-top: 0.8rem;
  font-size: 0.86rem;
  color: var(--text-2);
}
.long-text p {
  margin-bottom: 0.9rem;
}
.long-text strong {
  color: var(--accent-2);
}

/* 列表页与内容页通用结构 */
.list-page,
.article-page {
  max-width: 840px;
  margin: 0 auto;
  padding: 1.4rem 1.1rem 2.1rem;
}
.list-head,
.article-head {
  margin-bottom: 1rem;
}
.list-head h1,
.article-head h1 {
  font-size: 1.02rem;
  margin-bottom: 0.3rem;
}
.list-head p,
.article-head p {
  font-size: 0.82rem;
  color: var(--text-2);
}

.list-rows {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.list-item {
  display: flex;
  gap: 0.85rem;
  padding: 0.7rem 0.8rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(15,23,42,0.98);
  font-size: 0.8rem;
  color: var(--text-2);
}
.list-thumb {
  width: 130px;
  height: 80px;
  border-radius: 11px;
  overflow: hidden;
  flex-shrink: 0;
}
.list-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.list-body h2 {
  font-size: 0.86rem;
  margin-bottom: 0.2rem;
  color: #e5e7eb;
}

.article-body {
  max-width: 700px;
  font-size: 0.86rem;
  color: var(--text-2);
}
.article-body p {
  margin-bottom: 0.9rem;
}
.article-body h2 {
  font-size: 0.94rem;
  margin: 1.05rem 0 0.4rem;
  color: var(--accent-2);
}
.article-body img {
  width: 100%;
  border-radius: var(--radius);
  margin: 0.9rem 0;
  border: 1px solid var(--border);
}
.article-foot {
  margin-top: 1.1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-3);
}
.article-foot a {
  color: var(--accent-2);
}

footer.ft {
  padding: 1rem 1.1rem 1.5rem;
  border-top: 1px solid rgba(31,41,55,0.9);
  font-size: 0.74rem;
  color: var(--text-3);
  text-align: center;
}

/* 响应式 */
@media (max-width: 720px) {
  .topbar-in {
    padding-inline: 1rem;
  }
  .nav {
    display: none;
  }
  .feed {
    padding-inline: 1rem;
  }
  .list-page,
  .article-page {
    padding-inline: 1rem;
  }
  .lane-card {
    flex: 0 0 160px;
  }
  .list-item {
    flex-direction: column;
  }
  .list-thumb {
    width: 100%;
    height: 150px;
  }
}