/* 记事喵 site. Tokens first; one accent (brand blue); radius scale: 12 controls, 20 surfaces, pill buttons. */
:root{
  --bg:#f5f6f8;--surface:#ffffff;--surface-2:#eef1f5;--ink:#141820;--muted:#566070;--line:#e2e6ec;
  --accent:#2f5fd0;--accent-ink:#ffffff;--accent-soft:#2f5fd014;--danger:#c4344a;
  --shadow:0 24px 60px -32px #1d2d4f55,0 2px 6px #1d2d4f0d;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,monospace;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0d1015;--surface:#161a21;--surface-2:#1d222b;--ink:#e8ecf2;--muted:#9aa3b2;--line:#262d38;
  --accent:#6f95ff;--accent-ink:#0d1015;--accent-soft:#6f95ff1a;--danger:#ff7b8a;
  --shadow:0 24px 60px -30px #000c,0 2px 6px #0006;
}}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 var(--font);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;letter-spacing:-.02em;line-height:1.15;font-weight:700}
p{margin:0}
.wrap{width:min(1180px,100% - 48px);margin-inline:auto}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:16px;z-index:30;background:var(--surface);padding:8px 12px;border-radius:12px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
kbd{font:600 .82em var(--mono);display:inline-grid;place-items:center;min-width:1.9em;height:1.9em;padding:0 .4em;margin:0 .12em;border-radius:7px;
  background:var(--surface);border:1px solid var(--line);box-shadow:inset 0 -2px 0 var(--line);color:var(--ink);vertical-align:.08em}

/* Buttons: pill, one primary style, one ghost style. */
.button{display:inline-flex;align-items:center;gap:8px;white-space:nowrap;height:48px;padding:0 22px;border-radius:999px;font-weight:600;font-size:15px;
  background:var(--accent);color:var(--accent-ink);transition:transform .2s cubic-bezier(.16,1,.3,1),box-shadow .2s;box-shadow:0 10px 24px -12px var(--accent)}
.button:hover{transform:translateY(-1px)}.button:active{transform:translateY(1px) scale(.98)}
.button.ghost{background:transparent;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.button.ghost:hover{border-color:var(--muted)}
.button.small{height:38px;padding:0 16px;font-size:14px}
.button i{font-size:18px}

/* Nav: the one place glass earns its keep, since content scrolls beneath it. Web approximation, not Apple's material. */
.nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 78%,transparent);backdrop-filter:blur(18px) saturate(160%);-webkit-backdrop-filter:blur(18px) saturate(160%);border-bottom:1px solid color-mix(in srgb,var(--line) 70%,transparent)}
@media (prefers-reduced-transparency:reduce){.nav{background:var(--bg);backdrop-filter:none}}
.nav-row{height:64px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:8px}.brand strong{font-size:17px}.brand span{color:var(--muted);font-size:14px}
.nav-links{display:flex;gap:24px;margin-left:auto;font-size:15px;color:var(--muted)}.nav-links a:hover{color:var(--ink)}
.nav-actions{display:flex;align-items:center;gap:6px}
.icon-link{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;font-size:20px;color:var(--muted)}.icon-link:hover{color:var(--ink);background:var(--surface-2)}

/* Hero: asymmetric split, real screenshot right. */
.hero{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:56px;padding:56px 0 72px;min-height:calc(100dvh - 64px)}
.eyebrow{font-size:14px;font-weight:600;color:var(--accent);margin-bottom:18px}
.hero h1{font-size:clamp(44px,5.4vw,72px);letter-spacing:-.04em;line-height:1.08}
.lead{margin-top:22px;font-size:20px;color:var(--muted);max-width:30ch}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.hero-visual{position:relative;justify-self:center;width:min(440px,100%)}
.hero-visual img{border-radius:20px;box-shadow:var(--shadow)}
.glow{position:absolute;inset:-12% -18%;z-index:-1;filter:blur(48px);opacity:.75;
  background:radial-gradient(40% 35% at 25% 25%,#7cc8f0 0,transparent 70%),radial-gradient(38% 34% at 80% 45%,#a99cf0 0,transparent 70%),radial-gradient(36% 30% at 35% 85%,#f6b3ae 0,transparent 70%)}
@media (prefers-color-scheme:dark){.glow{opacity:.35}}
.keycap{position:absolute;left:-44px;bottom:-22px;display:flex;align-items:center;gap:4px;padding:10px 14px;border-radius:20px;
  background:color-mix(in srgb,var(--surface) 82%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--line);box-shadow:var(--shadow)}
.keycap span{margin-left:8px;font-size:14px;font-weight:600}

/* Pains: problem crossed out quietly, answer in full ink. */
.pains{padding:96px 0}
.pains h2,.features h2,.privacy-lead h2,.source h2,.start-head h2,.wechat-copy h2{font-size:clamp(30px,3.6vw,46px)}
.pain-list{margin-top:48px;display:grid;gap:4px}
.pain{display:grid;grid-template-columns:1fr 1fr;gap:48px;padding:28px 0;border-top:1px solid var(--line)}
.pain .before{color:var(--muted);text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--muted) 45%,transparent);font-size:18px}
.pain .after{font-size:20px;font-weight:600}

/* Features: bento with five cells, three carry real screenshots. */
.features{padding:24px 0 104px}
.bento{margin-top:44px;display:grid;grid-template-columns:repeat(6,1fr);grid-auto-rows:minmax(200px,auto);gap:16px}
.tile{position:relative;overflow:hidden;border-radius:20px;background:var(--surface);border:1px solid var(--line);padding:28px}
.tile h3{font-size:21px}.tile p{margin-top:10px;color:var(--muted);font-size:15px}
.tile img{border-radius:12px;box-shadow:var(--shadow)}
.tile-brief{grid-column:span 4;display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:end;background:linear-gradient(160deg,var(--accent-soft),var(--surface) 60%)}
.tile-brief img{margin-bottom:-90px;max-height:420px;width:auto;justify-self:center}
.tile-timeline{grid-column:span 2;grid-row:span 2;display:flex;flex-direction:column;gap:22px;background:#12161d;color:#e8ecf2;border-color:#232a35}
.tile-timeline p{color:#9aa3b2}.tile-timeline img{margin-bottom:-70px}
.tile-keys{grid-column:span 2}
.chips{list-style:none;margin:16px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.chips li{font-size:14px;padding:6px 12px;border-radius:999px;background:var(--surface-2);border:1px solid var(--line)}
.tile-model{grid-column:span 2;background:linear-gradient(180deg,var(--surface),var(--surface-2))}
.model-row{display:flex;gap:10px;margin-top:18px}.model-row span{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;padding:8px 14px;border-radius:12px;background:var(--surface);border:1px solid var(--line)}

/* WeChat: tinted band, copy left, live demo right. */
.wechat{background:var(--surface-2);padding:104px 0;border-block:1px solid var(--line)}
.wechat-grid{display:grid;grid-template-columns:1fr 420px;gap:72px;align-items:center}
.wechat-copy p{margin-top:18px;color:var(--muted);font-size:17px;max-width:42ch}
.wechat-copy .note{font-size:14px}
.phone{background:#e9edea;color:#1b2018;border-radius:20px;overflow:hidden;box-shadow:var(--shadow);border:1px solid #d5dbd6;display:flex;flex-direction:column;height:560px}
@media (prefers-color-scheme:dark){.phone{background:#1b1f1c;color:#e6ebe7;border-color:#2b322d}}
.phone-head{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid #0000000f}
.phone-head small{display:block;font-size:12px;opacity:.6;line-height:1.2}
.thread{flex:1;overflow-y:auto;padding:16px 14px;display:flex;flex-direction:column;gap:12px;scroll-behavior:smooth}
.msg{max-width:84%;padding:9px 12px;border-radius:12px;font-size:14px;line-height:1.65;white-space:pre-line;background:#fff;align-self:flex-start;box-shadow:0 1px 1px #0000000d}
.msg.me{align-self:flex-end;background:#95ec69;color:#1b2018}
@media (prefers-color-scheme:dark){.msg{background:#2b312d;color:#e6ebe7}.msg.me{background:#3f7d2a;color:#f1f7ee}}
.suggest{display:flex;gap:6px;overflow-x:auto;padding:10px 12px 0;scrollbar-width:none}
.suggest button{flex:none;font:inherit;font-size:13px;padding:6px 10px;border-radius:999px;border:1px solid #0000001a;background:#ffffffb3;color:inherit;cursor:pointer}
@media (prefers-color-scheme:dark){.suggest button{background:#ffffff12;border-color:#ffffff1f}}
.compose{display:flex;gap:8px;padding:10px 12px 14px}
.compose input{flex:1;min-width:0;font:inherit;font-size:14px;padding:10px 12px;border-radius:12px;border:1px solid #0000001f;background:#fff;color:#1b2018}
.compose input::placeholder{color:#6b736d}
@media (prefers-color-scheme:dark){.compose input{background:#262b28;color:#e6ebe7;border-color:#ffffff1f}.compose input::placeholder{color:#97a19a}}
.compose button{width:42px;border-radius:12px;border:0;background:#07c160;color:#fff;font-size:18px;cursor:pointer}

/* Privacy: statement left, facts stacked right. */
.privacy{display:grid;grid-template-columns:.9fr 1.1fr;gap:72px;padding:104px 0}
.privacy-lead p{margin-top:18px;color:var(--muted);font-size:17px;max-width:36ch}
.facts{list-style:none;margin:0;padding:0;display:grid;gap:28px}
.facts li{display:grid;grid-template-columns:44px 1fr;gap:16px}
.facts i{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:var(--accent-soft);color:var(--accent);font-size:22px}
.facts h3{font-size:18px}.facts p{margin-top:6px;color:var(--muted);font-size:15px}

/* Source: centered manifesto block with the real build command. */
.source{padding:24px 0 104px}
.source-inner{text-align:center;display:flex;flex-direction:column;align-items:center}
.source-inner p{margin-top:16px;color:var(--muted);font-size:17px;max-width:40ch}
.code{margin:32px 0;text-align:left;font:14px/1.8 var(--mono);background:#12161d;color:#dfe5ee;padding:20px 24px;border-radius:20px;max-width:100%;overflow-x:auto;border:1px solid #232a35}
.code .c{color:#7e8a9c}

/* Start: header with CTA, verb-led steps, FAQ. */
.start{padding:0 0 104px}
.start-head{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.steps{list-style:none;margin:40px 0 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:0;counter-reset:s;border-top:1px solid var(--line)}
.steps li{padding:28px 28px 28px 0;counter-increment:s}
.steps li+li{padding-left:28px;border-left:1px solid var(--line)}
.steps h3{font-size:19px}.steps h3::before{content:counter(s);display:inline-grid;place-items:center;width:28px;height:28px;margin-right:10px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:14px}
.steps p{margin-top:10px;color:var(--muted);font-size:15px}
.faq{margin-top:56px;max-width:820px}
.faq details{border-top:1px solid var(--line);padding:18px 0}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:600;font-size:17px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::after{content:"+";color:var(--muted);font-weight:400;transition:transform .2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin-top:12px;color:var(--muted);max-width:68ch}

.footer{border-top:1px solid var(--line);padding:36px 0 48px}
.footer-row{display:flex;align-items:center;gap:28px;flex-wrap:wrap}
.footer nav{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:15px}.footer nav a:hover{color:var(--ink)}
.footer p{margin-left:auto;color:var(--muted);font-size:14px}

/* Reveal on scroll: hierarchy, sections arrive as they are reached. Static under reduced motion. */
@media (prefers-reduced-motion:no-preference){
  .js .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.16,1,.3,1),transform .7s cubic-bezier(.16,1,.3,1)}
  .js .reveal.in{opacity:1;transform:none}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}

/* Mobile: every multi-column layout collapses to one column. */
@media (max-width:900px){
  .nav-links{display:none}.nav-actions{margin-left:auto}
  .hero{grid-template-columns:1fr;min-height:0;padding:32px 0 56px;gap:40px}
  .keycap{left:8px;bottom:24px}
  .pain{grid-template-columns:1fr;gap:10px}
  .bento{grid-template-columns:1fr}
  .tile-brief,.tile-timeline,.tile-keys,.tile-model{grid-column:auto;grid-row:auto}
  .tile-brief{grid-template-columns:1fr;padding:24px}
  .tile-brief img,.tile-timeline img{max-height:320px;margin-bottom:-60px}
  .wechat-grid,.privacy{grid-template-columns:1fr;gap:40px}
  .phone{height:520px}
  .steps{grid-template-columns:1fr}.steps li,.steps li+li{padding:22px 0;border-left:0;border-top:1px solid var(--line)}
  .steps li:first-child{border-top:0}
  .footer p{margin-left:0}
}
@media (max-width:480px){.wrap{width:calc(100% - 32px)}.hero h1{font-size:40px}.lead{font-size:18px}.button{height:46px;padding:0 18px}.nav .button.small{display:none}}