:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fb;
  --surface: #ffffff;
  --text: #16181d;
  --muted: #5b6270;
  --border: #e2e6ee;
  --accent: #3b62f0;
  --accent-2: #4e50ec;
  --accent-text: #ffffff;
  --code-bg: #eef1f7;
  --shadow: 0 18px 50px -20px rgba(30, 45, 90, 0.35);
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111318;
    --bg-alt: #171a21;
    --surface: #1b1f27;
    --text: #e8eaef;
    --muted: #9aa1ad;
    --border: #2a2f3a;
    --accent: #5b82ff;
    --accent-2: #6d6bff;
    --code-bg: #232835;
    --shadow: 0 18px 50px -20px rgba(0, 0, 0, 0.7);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, kbd, pre { font-family: "Cascadia Code", Consolas, "SFMono-Regular", monospace; font-size: 0.9em; }
code { background: var(--code-bg); padding: 0.1em 0.4em; border-radius: 5px; }
kbd {
  display: inline-block; padding: 0.05em 0.45em; border: 1px solid var(--border); border-bottom-width: 2px;
  border-radius: 6px; background: var(--surface); color: var(--text); font-size: 0.82em; line-height: 1.5; vertical-align: 0.08em;
}

/* 语言: <html data-lang="zh|en">, 只显示对应语言的文字 */
html[data-lang="zh"] [lang="en"], html[data-lang="en"] [lang="zh"] { display: none !important; }

.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.wrap.narrow { max-width: 800px; }

/* 导航 */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; color: var(--text); }
.brand:hover { text-decoration: none; }
.links { display: flex; gap: 22px; margin-left: auto; }
.links a { color: var(--muted); font-size: 0.95rem; }
.links a:hover { color: var(--text); text-decoration: none; }
.lang {
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: 8px; padding: 4px 10px; font: inherit; font-size: 0.85rem; cursor: pointer;
}

/* 首屏 */
.hero { padding: 72px 0 56px; background: radial-gradient(900px 400px at 85% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent); }
.hero-inner { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-weight: 600; font-size: 0.9rem; letter-spacing: 0.04em; }
.hero h1 { margin: 0 0 18px; font-size: clamp(2rem, 4.4vw, 3.1rem); line-height: 1.2; letter-spacing: -0.01em; }
.hero h1 kbd { font-size: 0.6em; vertical-align: 0.25em; }
.lead { margin: 0 0 28px; color: var(--muted); font-size: 1.1rem; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px; padding: 12px 20px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); font-weight: 600;
}
.btn:hover { text-decoration: none; border-color: var(--accent); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: var(--accent-text); border-color: transparent; }
.btn.primary:hover { filter: brightness(1.08); }
.btn small { font-weight: 400; opacity: 0.85; }
.meta { margin: 0; color: var(--muted); font-size: 0.88rem; }
.hero-shot img { border-radius: 10px; box-shadow: var(--shadow); border: 1px solid var(--border); }

/* 数字 */
.stats { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--bg-alt); }
.stats-inner { display: grid; grid-template-columns: repeat(5, 1fr); text-align: center; padding: 22px 16px; }
.stats strong { display: block; font-size: 1.6rem; line-height: 1.3; }
.stats span { color: var(--muted); font-size: 0.88rem; }

/* 分节 */
.section { padding: 76px 0; }
.section.alt { background: var(--bg-alt); }
.section h2 { margin: 0 0 12px; font-size: clamp(1.5rem, 3vw, 2rem); text-align: center; }
.sub { margin: 0 auto 32px; text-align: center; color: var(--muted); }
.section h2 + .grid, .section h2 + .tabs { margin-top: 32px; }
.grid { display: grid; gap: 18px; }
.grid > * { min-width: 0; }                     /* 长命令在 pre 里横向滚动, 不撑宽页面 */
.features { grid-template-columns: repeat(4, 1fr); }
.features article, .install article {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px;
}
.features h3, .install h3 { margin: 0 0 8px; font-size: 1.05rem; }
.features p, .install p { margin: 0 0 8px; color: var(--muted); font-size: 0.95rem; }

/* 截图 */
.tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 24px; }
.tabs button {
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
  border-radius: 999px; padding: 6px 16px; font: inherit; font-size: 0.92rem; cursor: pointer;
}
.tabs button[aria-selected="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.shot-frame { display: flex; justify-content: center; align-items: center; min-height: 200px; }   /* 不拉伸矮的截图 (计算器等) */
.shot-frame img { border-radius: 10px; box-shadow: var(--shadow); border: 1px solid var(--border); max-height: 560px; width: auto; }
.caption { text-align: center; color: var(--muted); margin: 18px 0 0; }

/* 主题 */
.themes { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); align-items: start; }
.theme { margin: 0; }
.theme img { border-radius: 8px; border: 1px solid var(--border); }                 /* 按截图原来的比例, 紧凑主题矮一些 */
.theme figcaption { margin-top: 8px; text-align: center; font-size: 0.92rem; color: var(--muted); }

/* 安装 */
.install { grid-template-columns: repeat(3, 1fr); }
.install ol { margin: 0; padding-left: 1.2em; color: var(--muted); }
.install li { margin-bottom: 6px; }
.install pre { margin: 0 0 12px; background: var(--code-bg); border-radius: 8px; padding: 12px; overflow-x: auto; }
.install pre code { background: none; padding: 0; }
.copy {
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  border-radius: 8px; padding: 4px 12px; font: inherit; font-size: 0.85rem; cursor: pointer;
}

/* 更新内容 */
.changes { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 8px 26px 18px; margin-bottom: 16px; }
.changes h4 { margin: 18px 0 6px; }
.changes p, .changes li { color: var(--muted); font-size: 0.95rem; }
.changes ul { padding-left: 1.2em; margin: 0; }
.changes li { margin-bottom: 6px; }
#changes .sub { margin-bottom: 16px; }

/* 页脚 */
.footer { border-top: 1px solid var(--border); padding: 32px 0; color: var(--muted); font-size: 0.9rem; }
.footer-inner { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; align-items: flex-start; }
.footer p { margin: 8px 0 0; }
.footer nav { display: flex; flex-wrap: wrap; gap: 18px; }
.footer nav a { color: var(--muted); }

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .install { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(3, 1fr); row-gap: 14px; }
  .links { display: none; }
  .lang { margin-left: auto; }
}
@media (max-width: 560px) {
  .hero { padding: 44px 0 36px; }
  .features { grid-template-columns: 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 56px 0; }
}

/* 下载区下面的代码签名说明 */
.signing { margin-top: 28px; color: var(--muted); font-size: 0.9rem; }
.signing p { margin: 4px 0; }