:root {
  --bg: #fbfbfd; --fg: #1d1d1f; --muted: #6e6e73; --card: #ffffff; --line: #e5e5ea; --soft: #f2f2f5;
  --accent: #0071e3; --accent-fg: #fff; --orange: #ff8a3d;
  --radius: 20px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #000; --fg: #f5f5f7; --muted: #a1a1a6; --card: #1c1c1e; --line: #2c2c2e; --soft: #161618; --accent: #2997ff; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg); -webkit-font-smoothing: antialiased;
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
code { font: 0.9em ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--soft); padding: 1px 6px; border-radius: 6px; }
h1, h2, h3 { letter-spacing: -0.015em; }
h2 { font-size: clamp(26px, 4vw, 36px); line-height: 1.2; margin: 0 0 8px; }
.sub { color: var(--muted); margin: 0 0 32px; }

.nav {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between;
  padding: 12px max(20px, calc((100vw - 1080px) / 2)); backdrop-filter: saturate(180%) blur(20px);
  background: color-mix(in srgb, var(--bg) 78%, transparent); border-bottom: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); font-weight: 650; font-size: 17px; }
.nav nav { display: flex; gap: 22px; font-size: 14px; }
.nav nav a { color: var(--muted); }
.nav nav a:hover { color: var(--fg); }

main { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
section { padding: 72px 0; }

/* Hero */
.hero { text-align: center; padding-top: 56px; }
.stage { height: 88px; display: flex; justify-content: center; align-items: flex-start; }
.island {
  display: inline-flex; align-items: center; justify-content: space-between; gap: 18px;
  background: #000; color: #f5f5f7; border-radius: 999px; padding: 10px 18px; min-width: 260px; height: 46px;
  box-shadow: 0 18px 40px rgba(0,0,0,.22); font-weight: 600; font-size: 15px;
  transition: min-width .5s cubic-bezier(.2,.9,.3,1.2);
}
.island.wide { min-width: 340px; }
.island .slot { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; transition: opacity .25s; }
.island .slot.fade { opacity: 0; }
.island .mascot { width: 24px; height: 24px; border-radius: 50%; background: var(--orange); position: relative; }
.island .mascot::before, .island .mascot::after { content: ""; position: absolute; top: 9px; width: 4px; height: 6px; border-radius: 2px; background: #2b1306; }
.island .mascot::before { left: 7px; } .island .mascot::after { right: 7px; }
.island .dim, .mini .dim { color: #a1a1a6; font-weight: 500; }
.eyebrow { color: var(--muted); font-size: 14px; margin: 28px 0 0; letter-spacing: .04em; }
h1 { font-size: clamp(34px, 6.4vw, 64px); line-height: 1.08; margin: 10px 0 18px; }
br.m { display: none; }
.lead { color: var(--muted); font-size: clamp(16px, 2vw, 19px); max-width: 720px; margin: 0 auto; }
.cta { margin-top: 34px; display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; padding: 13px 28px; border-radius: 999px; font-weight: 600; font-size: 16px; }
.button.primary { background: var(--accent); color: var(--accent-fg); }
.button.ghost { color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }
.meta { color: var(--muted); font-size: 13px; margin: 12px 0 0; }
.badges { list-style: none; padding: 0; margin: 22px 0 0; display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.badges li { font-size: 13px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 3px 12px; }

/* Moments */
.moments { text-align: center; }
.moment-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; text-align: left; }
.moment-grid figure { margin: 0; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.mini { min-width: 0; width: 100%; height: 42px; font-size: 14px; padding: 8px 14px; gap: 10px; box-shadow: none; }
/* The main words stay whole; the grey detail on the right gives way first. */
.mini b { flex: none; white-space: nowrap; }
.mini .dim { flex: 1; min-width: 0; text-align: right; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mini .mono, .island .mono { font-variant-numeric: tabular-nums; }
.pill { background: #2c2c2e; color: #f5f5f7; border-radius: 999px; padding: 1px 9px; font-size: 12px; white-space: nowrap; }
.pill.accent { background: var(--accent); color: #fff; }
.ring { --p: 50; width: 22px; height: 22px; border-radius: 50%; flex: none;
  background: conic-gradient(#2997ff calc(var(--p) * 1%), #3a3a3c 0); mask: radial-gradient(circle, transparent 6px, #000 6.5px); }
figcaption h3 { margin: 16px 0 4px; font-size: 17px; }
figcaption p { margin: 0; color: var(--muted); font-size: 14px; }

/* Features */
.features { text-align: center; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; text-align: left; }
.feature-grid article { background: var(--card); padding: 24px; }
.feature-grid h3 { margin: 0 0 6px; font-size: 17px; }
.feature-grid p { margin: 0; color: var(--muted); font-size: 14px; }

/* Privacy */
.privacy { display: grid; grid-template-columns: 1fr 1.4fr; gap: 40px; align-items: start; }
.privacy ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.privacy li { background: var(--soft); border-radius: 16px; padding: 16px 18px; color: var(--muted); font-size: 15px; }
.privacy li b { color: var(--fg); }

/* Plugins */
.plugins { text-align: center; }
.builtin, .plugin-groups, .catalog-title, .note { text-align: left; }
.builtin h3, .catalog-title { font-size: 15px; color: var(--muted); font-weight: 600; margin: 0 0 12px; }
.catalog-title { margin-top: 32px; }
.chips { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li { background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 5px 14px; font-size: 14px; }
.plugin-groups { display: grid; gap: 24px; }
.group h4 { margin: 0 0 10px; font-size: 14px; color: var(--muted); font-weight: 600; }
.group-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.plugin { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px 18px; display: flex; flex-direction: column; gap: 6px; }
.plugin .head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.plugin h5 { margin: 0; font-size: 16px; }
.plugin .ver { color: var(--muted); font-size: 12px; white-space: nowrap; }
.plugin p { margin: 0; color: var(--muted); font-size: 14px; flex: 1; }
.plugin .foot { display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: var(--muted); margin-top: 6px; }
.tag { font-size: 11px; border: 1px solid var(--line); border-radius: 999px; padding: 0 7px; margin-left: 6px; color: var(--muted); }
.note { color: var(--muted); font-size: 14px; margin-top: 28px; }

/* Download */
.download { text-align: center; }
.platforms { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; text-align: left; }
.platform { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.platform.current { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.platform h3 { margin: 0 0 4px; font-size: 18px; }
.platform p { margin: 0 0 14px; color: var(--muted); font-size: 14px; }
.platform .links { display: flex; flex-direction: column; gap: 8px; }
.platform .links a { display: flex; justify-content: space-between; background: var(--soft); border-radius: 12px; padding: 10px 14px; font-size: 14px; }
.platform .links a.missing { color: var(--muted); pointer-events: none; }
.requirements { color: var(--muted); font-size: 13px; margin-top: 24px; }

/* FAQ */
.faq { max-width: 760px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::after { content: "+"; color: var(--muted); font-weight: 400; }
.faq details[open] summary::after { content: "–"; }
.faq p { color: var(--muted); margin: 10px 0 0; font-size: 15px; }

footer { max-width: 1080px; margin: 0 auto; padding: 28px 20px 48px; display: flex; gap: 22px; flex-wrap: wrap; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); }
footer a { color: var(--muted); }

@media (max-width: 760px) {
  section { padding: 52px 0; }
  .nav nav { gap: 14px; } .nav nav a:nth-child(4) { display: none; }
  br.m { display: inline; }
  .privacy { grid-template-columns: 1fr; gap: 20px; }
  .island { min-width: 220px; } .island.wide { min-width: 280px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .island, .island .slot { transition: none; } }