/* 茄子视频 · 下载与老版本说明站
   架构：顶部深色导航 + 浅色知识库式首页
   - 上：Hero 标题 + 说明
   - 中：三宫格入口卡片
   - 下：左侧长文说明（800-1200 字）+ 右侧帮助卡片
   与之前的暗色多栏 / 信息流 / 时间线完全不同，偏知识库 / 帮助中心风格 */

:root {
  --bg: #f3f4f6;
  --panel: #ffffff;
  --panel-soft: #f9fafb;
  --border: #e5e7eb;
  --border-strong: #d1d5db;
  --nav: #111827;
  --accent: #22c55e;   /* 茄子绿 */
  --accent-2: #0ea5e9; /* 蓝色强调 */
  --accent-soft: rgba(14, 165, 233, 0.08);
  --text-main: #111827;
  --text-sub: #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(14, 165, 233, 0.16) 0, transparent 45%),
    radial-gradient(circle at bottom right, rgba(34, 197, 94, 0.16) 0, transparent 45%),
    var(--bg);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.7;
}

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

/* 顶部导航：深色条 + 简洁菜单 */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, #020617, #111827);
  border-bottom: 1px solid rgba(15, 23, 42, 0.9);
}
.topbar-in {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.7rem 1.4rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.logo {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  font-size: 1.06rem;
  font-weight: 700;
  color: #e5e7eb;
}
.logo span {
  font-size: 0.7rem;
  padding: 0.12rem 0.6rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.9);
  color: var(--accent);
}
.nav {
  display: flex;
  gap: 0.8rem;
  font-size: 0.86rem;
}
.nav a {
  color: #e5e7eb;
  opacity: 0.75;
}
.nav a.on {
  opacity: 1;
  font-weight: 600;
}
.fill {
  flex: 1;
}
.note {
  font-size: 0.76rem;
  color: #9ca3af;
}

/* 页面容器 */
.shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.6rem 1.4rem 2.3rem;
}

/* Hero：大标题 + 简短说明 */
.hero {
  background: radial-gradient(circle at top left, rgba(255, 255, 255, 0.9) 0, rgba(249, 250, 251, 0.95) 60%, #f9fafb 100%);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 1.15rem 1.3rem 1.35rem;
  box-shadow: 0 16px 38px rgba(15, 23, 42, 0.08);
  margin-bottom: 1.45rem;
}
.hero h1 {
  font-size: 1.12rem;
  margin-bottom: 0.45rem;
}
.hero p {
  font-size: 0.88rem;
  color: var(--text-sub);
  margin-bottom: 0.65rem;
}
.hero strong {
  color: var(--accent-2);
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  font-size: 0.78rem;
}
.hero-tags span {
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: #ffffff;
  color: #4b5563;
}

/* 三宫格入口：下载 / 老版本 / 安全 */
.grid-top {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.4rem;
}
.g-card {
  background: var(--panel);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.06);
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  font-size: 0.84rem;
}
.g-card h2 {
  font-size: 0.9rem;
}
.g-card p {
  color: var(--text-sub);
}
.g-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 0.76rem;
  color: #0369a1;
}

/* 下部：左长文 + 右帮助卡片 */
.main {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1.1fr);
  gap: 1.3rem;
  align-items: flex-start;
}

.article {
  background: var(--panel);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 1.05rem 1.2rem 1.3rem;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
  font-size: 0.86rem;
}
.article h2 {
  font-size: 0.96rem;
  margin-bottom: 0.55rem;
}
.article p {
  color: var(--text-sub);
  margin-bottom: 0.9rem;
}
.article strong {
  color: var(--accent-2);
}

.aside {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.aside-card {
  background: var(--panel-soft);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 0.8rem 0.9rem;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
  font-size: 0.82rem;
}
.aside-card h3 {
  font-size: 0.88rem;
  margin-bottom: 0.3rem;
}
.aside-card p {
  color: var(--text-sub);
}
.aside-list {
  margin-top: 0.4rem;
  list-style: none;
}
.aside-list li + li {
  margin-top: 0.24rem;
}
.aside-list a {
  color: var(--accent-2);
  font-size: 0.8rem;
}

/* 列表页与内容页结构 */
.list-page,
.article-page {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.6rem 1.4rem 2.3rem;
}
.list-head,
.article-head {
  margin-bottom: 1rem;
}
.list-head h1,
.article-head h1 {
  font-size: 1.04rem;
  margin-bottom: 0.3rem;
}
.list-head p,
.article-head p {
  font-size: 0.84rem;
  color: var(--text-sub);
}

.list-rows {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.list-item {
  display: flex;
  gap: 0.8rem;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.04);
  font-size: 0.82rem;
  color: var(--text-sub);
}
.list-thumb {
  width: 140px;
  height: 82px;
  border-radius: 12px;
  overflow: hidden;
  flex-shrink: 0;
}
.list-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.list-body h2 {
  font-size: 0.88rem;
  margin-bottom: 0.22rem;
  color: var(--text-main);
}

.article-body {
  max-width: 720px;
  font-size: 0.86rem;
  color: var(--text-sub);
}
.article-body p {
  margin-bottom: 0.95rem;
}
.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: 1.15rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-sub);
}
.article-foot a {
  color: var(--accent-2);
}

footer.ft {
  padding: 1rem 1.4rem 1.6rem;
  border-top: 1px solid rgba(209, 213, 219, 0.9);
  font-size: 0.76rem;
  color: var(--text-sub);
  text-align: center;
}

/* 响应式 */
@media (max-width: 960px) {
  .shell {
    padding-inline: 1.1rem;
  }
  .list-page,
  .article-page {
    padding-inline: 1.1rem;
  }
}
@media (max-width: 820px) {
  .grid-top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .main {
    grid-template-columns: minmax(0, 1fr);
  }
}
@media (max-width: 720px) {
  .topbar-in {
    padding-inline: 1rem;
  }
  .nav {
    display: none;
  }
  .shell {
    padding-inline: 1rem;
  }
  .grid-top {
    grid-template-columns: minmax(0, 1fr);
  }
  .list-item {
    flex-direction: column;
  }
  .list-thumb {
    width: 100%;
    height: 150px;
  }
}