/* LarkRelay 官网。不加载任何外部字体或脚本：Google Fonts 等在中国大陆不可用，会拖慢甚至卡住页面。 */
:root {
  --sky: #eef3f8;        /* 底色：清晨的天 */
  --sky-deep: #dde6ef;   /* 分隔、次要底色 */
  --ink: #16213a;        /* 正文与标题 */
  --ink-soft: #4c5872;   /* 次要文字 */
  --lark: #b5761c;       /* 云雀胸羽：加速线路与主按钮 */
  --lark-ink: #ffffff;
  --slate: #6a7890;      /* 直连线路 */
  --focus: #2b62d9;
  --measure: 34em;
  --font: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Noto Sans CJK SC", "Source Han Sans SC",
    "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --sky: #0f1626;
    --sky-deep: #1c2740;
    --ink: #e7edf6;
    --ink-soft: #a6b1c6;
    --lark: #e0a24a;
    --lark-ink: #1a1206;
    --slate: #8492ab;
    --focus: #8fb2ff;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--sky);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.75;
}
a { color: inherit; text-underline-offset: 0.2em; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap { max-width: 68rem; margin: 0 auto; padding: 0 24px; }

/* 页头 */
.top { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.mark { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; text-decoration: none; letter-spacing: -0.01em; }
.mark svg { width: 26px; height: 26px; }
.top nav a { font-size: 15px; color: var(--ink-soft); text-decoration: none; }
.top nav a:hover { color: var(--ink); text-decoration: underline; }

/* 首页只有一屏：标题、说明、下载 */
.wrap { min-height: 100vh; min-height: 100svh; display: flex; flex-direction: column; }
.hero { flex: 1; padding: 10vh 0 8vh; }
.hero h1 {
  margin: 0;
  font-size: clamp(3.1rem, 10vw, 7rem);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -0.035em;
}
.lead { max-width: var(--measure); margin: 28px 0 0; font-size: 19px; color: var(--ink-soft); }

.get { margin-top: 36px; display: flex; flex-wrap: wrap; align-items: center; gap: 14px 22px; }
.btn {
  display: inline-flex; align-items: center; gap: 12px;
  background: var(--lark); color: var(--lark-ink);
  font-size: 18px; font-weight: 700; text-decoration: none;
  padding: 16px 28px; border-radius: 999px;
}
.btn svg { width: 20px; height: 20px; }
.btn:hover { filter: brightness(1.06); }
.get small { font-size: 14px; color: var(--ink-soft); line-height: 1.5; }
/* 第二个下载（Windows）：描边按钮，主次分明 */
.get-alt { margin-top: 44px; }
.btn.alt { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 2px var(--lark); }
.btn.alt:hover { filter: none; background: color-mix(in srgb, var(--lark) 12%, transparent); }

.hint { max-width: var(--measure); margin: 22px 0 0; font-size: 14px; color: var(--ink-soft); }
.hint + .hint { margin-top: 8px; }

footer { padding: 28px 0 40px; border-top: 1px solid var(--sky-deep); font-size: 14px; color: var(--ink-soft); display: flex; flex-wrap: wrap; gap: 8px 24px; }

/* 隐私政策等长文页 */
.doc { max-width: 40em; padding: 4vh 0 0; }
.doc h1 { font-size: clamp(2rem, 6vw, 3rem); letter-spacing: -0.02em; line-height: 1.2; margin: 0 0 8px; }
.doc h2 { font-size: 20px; margin: 36px 0 8px; }
.doc p, .doc li { color: var(--ink-soft); }
.doc .meta { font-size: 14px; color: var(--ink-soft); }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .lead { font-size: 17px; }
}