/* ============ 基础 ============ */
:root {
  --bg: #FAFAFC;
  --surface: #FFFFFF;
  --text: #171A20;
  --muted: #6A7178;
  --faint: #9AA1A9;
  --border: #E7E8EC;
  --brand: #16324F;
  --brand-ink: #0F2438;
  --accent: #2B7FFF;
  --accent-soft: #EAF2FF;
  --green: #0E7C52;
  --green-soft: #E5F5EE;
  --amber: #9A6A08;
  --amber-soft: #FBF3DF;
  --radius: 14px;
  --shadow-sm: 0 1px 2px rgba(20, 30, 50, .05);
  --shadow-md: 0 2px 4px rgba(20, 30, 50, .05), 0 12px 32px rgba(20, 30, 50, .08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", Consolas, "Courier New", monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1060px; margin: 0 auto; padding: 0 24px; }

/* ============ 顶栏 ============ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 500; font-size: 16px; letter-spacing: -.01em; }
.logo img { width: 28px; height: 28px; border-radius: 7px; }
.logo .logo-sub { color: var(--faint); font-size: 12px; font-weight: 400; margin-left: 2px; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  padding: 6px 13px; border-radius: 8px; font-size: 14px; color: var(--muted);
  transition: color .15s, background .15s;
}
.nav a:hover { color: var(--text); background: rgba(0, 0, 0, .045); }
.nav a.active { color: var(--text); background: rgba(0, 0, 0, .06); font-weight: 500; }
.nav .gh { display: flex; align-items: center; gap: 6px; }
.nav .gh svg { width: 17px; height: 17px; }

/* ============ Hero ============ */
.hero { padding: 84px 0 56px; }
.hero h1 {
  font-size: 40px; line-height: 1.25; font-weight: 500; letter-spacing: -.025em;
  max-width: 640px;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lead { margin-top: 18px; font-size: 17px; color: var(--muted); max-width: 560px; }
.hero .actions { margin-top: 30px; display: flex; gap: 12px; flex-wrap: wrap; }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: 10px; font-size: 14.5px; font-weight: 500;
  border: 1px solid transparent; cursor: pointer; transition: all .18s;
  font-family: var(--font);
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-ink); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: #C9CCD3; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn-sm { padding: 7px 14px; font-size: 13.5px; border-radius: 8px; }
.btn .dl-ico { width: 15px; height: 15px; }

/* ============ 区块 ============ */
.section { padding: 44px 0 10px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 22px; }
.section-head h2 { font-size: 22px; font-weight: 500; letter-spacing: -.02em; }
.section-head .more { font-size: 13.5px; color: var(--muted); }
.section-head .more:hover { color: var(--accent); }

/* ============ 软件卡 ============ */
.filter-bar { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.filter-bar button {
  padding: 6px 15px; border-radius: 999px; font-size: 13.5px; font-family: var(--font);
  background: var(--surface); border: 1px solid var(--border); color: var(--muted); cursor: pointer;
  transition: all .15s;
}
.filter-bar button:hover { border-color: #C9CCD3; color: var(--text); }
.filter-bar button.on { background: var(--brand); border-color: var(--brand); color: #fff; }

.app-card {
  display: flex; gap: 20px; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; margin-bottom: 16px; box-shadow: var(--shadow-sm);
  transition: all .2s;
}
.app-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: #DCDEE4; }
.app-icon { width: 58px; height: 58px; border-radius: 13px; flex-shrink: 0; }
.app-card .info { flex: 1; min-width: 0; }
.app-card h3 { font-size: 17px; font-weight: 500; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.app-card h3 .ver { font-size: 12px; color: var(--green); background: var(--green-soft); padding: 2px 8px; border-radius: 6px; font-weight: 400; }
.app-card .desc { color: var(--muted); font-size: 14px; margin-top: 6px; }
.app-card .meta { margin-top: 10px; display: flex; gap: 14px; align-items: center; flex-wrap: wrap; font-size: 12.5px; color: var(--faint); }
.tag { font-size: 12px; padding: 2px 9px; border-radius: 6px; background: var(--accent-soft); color: #1B5FD0; }
.app-card .side { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; flex-shrink: 0; }
.app-card .side .size { font-size: 12.5px; color: var(--faint); }

/* ============ 文章条目 ============ */
.post-item {
  display: flex; align-items: baseline; gap: 18px;
  padding: 18px 4px; border-bottom: 1px solid var(--border);
}
.post-item:last-child { border-bottom: none; }
.post-item .date { font-size: 13px; color: var(--faint); font-family: var(--mono); flex-shrink: 0; width: 92px; }
.post-item a.title { font-size: 15.5px; font-weight: 500; }
.post-item a.title:hover { color: var(--accent); }
.post-item .desc { color: var(--muted); font-size: 13.5px; margin-top: 3px; }
.post-item .tag { flex-shrink: 0; }

/* ============ 详情页 ============ */
.crumbs { padding: 26px 0 0; font-size: 13.5px; color: var(--faint); }
.crumbs a:hover { color: var(--accent); }
.app-hero {
  display: flex; gap: 22px; align-items: center; margin: 20px 0 30px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 18px;
  padding: 30px; box-shadow: var(--shadow-sm);
}
.app-hero img { width: 76px; height: 76px; border-radius: 17px; }
.app-hero h1 { font-size: 26px; font-weight: 500; letter-spacing: -.02em; }
.app-hero .sub { color: var(--muted); margin-top: 5px; font-size: 15px; }
.app-hero .dl-row { margin-top: 16px; display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.app-hero .dl-note { font-size: 12.5px; color: var(--faint); }

.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 28px; margin-bottom: 18px; box-shadow: var(--shadow-sm);
}
.panel > h2 { font-size: 18px; font-weight: 500; margin-bottom: 14px; letter-spacing: -.01em; }
.panel ul.feat { list-style: none; }
.panel ul.feat li { padding: 7px 0 7px 26px; position: relative; color: #33383E; font-size: 14.5px; }
.panel ul.feat li::before {
  content: ""; position: absolute; left: 4px; top: 16px;
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent);
}
.steps { counter-reset: step; list-style: none; }
.steps li { counter-increment: step; position: relative; padding: 10px 0 10px 44px; }
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: 12px;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent-soft); color: #1B5FD0;
  font-size: 14px; font-weight: 500; display: flex; align-items: center; justify-content: center;
}
.steps li b { font-weight: 500; }
.steps li p { color: var(--muted); font-size: 14px; margin-top: 2px; }

.timeline { list-style: none; }
.timeline li { position: relative; padding: 0 0 24px 26px; border-left: 1px solid var(--border); margin-left: 6px; }
.timeline li:last-child { padding-bottom: 4px; }
.timeline li::before {
  content: ""; position: absolute; left: -5.5px; top: 7px;
  width: 10px; height: 10px; border-radius: 50%; background: var(--surface); border: 2px solid var(--accent);
}
.timeline .v { font-weight: 500; font-size: 15px; display: flex; gap: 12px; align-items: baseline; }
.timeline .v .date { font-size: 12.5px; color: var(--faint); font-family: var(--mono); font-weight: 400; }
.timeline .v .new { font-size: 11.5px; color: var(--green); background: var(--green-soft); padding: 1px 7px; border-radius: 5px; }
.timeline ul { margin: 8px 0 0; padding-left: 2px; list-style: none; }
.timeline ul li { border: none; padding: 2px 0; margin: 0; color: var(--muted); font-size: 14px; }
.timeline ul li::before { content: "·"; position: static; border: none; background: none; margin-right: 8px; color: var(--faint); }

.dl-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }
.dl-opt {
  border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px;
  display: flex; flex-direction: column; gap: 4px; transition: all .18s; background: var(--surface);
}
.dl-opt:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.dl-opt .name { font-weight: 500; font-size: 14.5px; display: flex; align-items: center; gap: 8px; }
.dl-opt .name .badge { font-size: 11px; color: var(--green); background: var(--green-soft); padding: 1px 7px; border-radius: 5px; font-weight: 400; }
.dl-opt .note { font-size: 12.5px; color: var(--muted); }

/* ============ 文章正文 ============ */
.article { max-width: 720px; margin: 0 auto; padding: 40px 0 30px; }
.article .a-date { font-size: 13px; color: var(--faint); font-family: var(--mono); margin-bottom: 10px; }
.article h1 { font-size: 30px; font-weight: 500; letter-spacing: -.02em; line-height: 1.35; margin-bottom: 26px; }
.article h2 { font-size: 20px; font-weight: 500; margin: 36px 0 14px; letter-spacing: -.01em; }
.article h3 { font-size: 16.5px; font-weight: 500; margin: 26px 0 10px; }
.article p { margin: 12px 0; color: #2A2F36; }
.article ul, .article ol { padding-left: 24px; margin: 12px 0; }
.article li { margin: 5px 0; color: #2A2F36; }
.article img { border-radius: 10px; border: 1px solid var(--border); margin: 16px 0; }
.article code {
  font-family: var(--mono); font-size: 13px; background: rgba(20, 40, 80, .06);
  padding: 2px 6px; border-radius: 5px;
}
.article pre {
  background: #14181F; color: #D6DEE8; border-radius: 12px; padding: 18px 20px;
  overflow-x: auto; margin: 18px 0; font-size: 13.5px; line-height: 1.7;
}
.article pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.article table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14px; }
.article th, .article td { border: 1px solid var(--border); padding: 9px 13px; text-align: left; }
.article th { background: #F4F5F8; font-weight: 500; }
.article blockquote {
  border-left: 3px solid var(--accent); background: var(--accent-soft);
  padding: 12px 18px; border-radius: 0 10px 10px 0; margin: 16px 0; color: #2B4A77; font-size: 14.5px;
}
.tip { border-left: 3px solid var(--green); background: var(--green-soft); padding: 12px 18px; border-radius: 0 10px 10px 0; margin: 16px 0; color: #14563C; font-size: 14.5px; }
.warn { border-left: 3px solid var(--amber); background: var(--amber-soft); padding: 12px 18px; border-radius: 0 10px 10px 0; margin: 16px 0; color: #6E4E0B; font-size: 14.5px; }

/* ============ 关于页 ============ */
.about-card { max-width: 640px; }
.about-card p { margin: 12px 0; color: #2A2F36; }

/* ============ 页脚 ============ */
.site-footer { border-top: 1px solid var(--border); margin-top: 70px; padding: 34px 0 44px; }
.site-footer .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.site-footer .f-left { color: var(--faint); font-size: 13.5px; }
.site-footer .f-left b { color: var(--muted); font-weight: 500; }
.site-footer .f-links { display: flex; gap: 20px; font-size: 13.5px; }
.site-footer .f-links a { color: var(--muted); }
.site-footer .f-links a:hover { color: var(--accent); }

/* ============ 响应式 ============ */
@media (max-width: 720px) {
  .logo-sub { display: none; }
  .hero { padding: 56px 0 40px; }
  .hero h1 { font-size: 30px; }
  .app-card { flex-direction: column; gap: 14px; }
  .app-card .side { flex-direction: row; align-items: center; width: 100%; justify-content: space-between; }
  .app-hero { flex-direction: column; align-items: flex-start; padding: 24px; }
  .post-item { flex-wrap: wrap; gap: 8px 14px; }
  .post-item .date { width: auto; order: 2; }
  .post-item .tag { order: 3; }
  .post-item > div { order: 1; width: 100%; }
  .nav a { padding: 6px 9px; font-size: 13.5px; }
}