/* ============================================================
   Taskstick 日事贴 官网 v2
   克制、以产品为主角：浅/深双主题，HTML 动效演示产品功能
   ============================================================ */

@font-face { font-family: 'Sora'; font-weight: 400; font-display: swap; src: url('../fonts/sora-400-latin.woff2') format('woff2'); unicode-range: U+0000-00FF, U+2000-206F; }
@font-face { font-family: 'Sora'; font-weight: 600; font-display: swap; src: url('../fonts/sora-600-latin.woff2') format('woff2'); unicode-range: U+0000-00FF, U+2000-206F; }
@font-face { font-family: 'Sora'; font-weight: 700; font-display: swap; src: url('../fonts/sora-700-latin.woff2') format('woff2'); unicode-range: U+0000-00FF, U+2000-206F; }
@font-face { font-family: 'IBM Plex Mono'; font-weight: 400; font-display: swap; src: url('../fonts/ibm-plex-mono-400-latin.woff2') format('woff2'); unicode-range: U+0000-00FF, U+2000-206F; }
@font-face { font-family: 'IBM Plex Mono'; font-weight: 500; font-display: swap; src: url('../fonts/ibm-plex-mono-500-latin.woff2') format('woff2'); unicode-range: U+0000-00FF, U+2000-206F; }

/* ---------- Tokens ---------- */
:root {
  color-scheme: light;
  --bg: #f6f7f5;
  --bg-alt: #eef1ed;
  --surface: #ffffff;
  --surface-2: #f3f5f2;
  --ink: #121a15;
  --ink-2: #4b5750;
  --ink-3: #85908a;
  --line: #e2e7e2;
  --line-2: #d2d9d3;
  --accent: #2a9d5f;
  --accent-hover: #238752;
  --accent-soft: #e3f3ea;
  --accent-text: #1f7d4b;
  --on-accent: #ffffff;
  --red: #e5484d;
  --orange: #f0a020;
  --blue: #3b82f6;
  --shadow-sm: 0 1px 2px rgba(16, 32, 22, .06);
  --shadow-win: 0 1px 0 rgba(255,255,255,.6) inset, 0 2px 4px rgba(16,32,22,.04), 0 24px 60px -12px rgba(16,32,22,.18);
  --radius: 14px;

  --font: 'Sora', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --ease: cubic-bezier(.2, .8, .2, 1);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b0e0c;
  --bg-alt: #0f1411;
  --surface: #141a16;
  --surface-2: #1a211c;
  --ink: #eef3ef;
  --ink-2: #a8b3ac;
  --ink-3: #6f7b74;
  --line: #222a25;
  --line-2: #2e3831;
  --accent: #3fcf8e;
  --accent-hover: #5bdca0;
  --accent-soft: rgba(63, 207, 142, .12);
  --accent-text: #5bdca0;
  --on-accent: #06140c;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow-win: 0 0 0 1px rgba(255,255,255,.03) inset, 0 30px 80px -20px rgba(0,0,0,.7);
}

/* ---------- Base ---------- */
*, *::before, *::after { 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;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.25; font-weight: 700; }
p { margin: 0; }
code {
  font-family: var(--mono);
  font-size: .88em;
  padding: .12em .4em;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent-text);
  white-space: nowrap;
}
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
::selection { background: var(--accent-soft); color: var(--ink); }

.container { width: min(1160px, 100% - 48px); margin-inline: auto; }
.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--surface); padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 16px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 20px;
  border-radius: 10px; border: 1px solid transparent;
  font-size: 15px; font-weight: 600; white-space: nowrap;
  transition: background .2s, border-color .2s, transform .2s var(--ease), box-shadow .2s;
}
.btn:active { transform: translateY(1px); }
.btn-sm { height: 34px; padding: 0 14px; font-size: 14px; border-radius: 8px; }
.btn-lg { height: 50px; padding: 0 24px; font-size: 16px; border-radius: 12px; }
.btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: 0 1px 0 rgba(255,255,255,.18) inset, 0 6px 16px -6px color-mix(in srgb, var(--accent) 60%, transparent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: var(--surface); border-color: var(--line-2); color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink-3); }
.btn .apple { width: 18px; height: 18px; fill: currentColor; stroke: none; margin-top: -2px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.nav.is-scrolled { border-bottom-color: var(--line); }
.nav-inner { display: flex; align-items: center; height: 64px; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px; letter-spacing: -.01em; }
.brand img { width: 32px; height: 32px; margin: -4px -2px -4px -6px; }
.brand-cn { font-size: 13px; font-weight: 500; color: var(--ink-3); padding-left: 8px; border-left: 1px solid var(--line-2); margin-left: 2px; }
.nav-links { display: flex; gap: 28px; font-size: 14.5px; color: var(--ink-2); }
.nav-links a { transition: color .2s; }
.nav-links a:hover { color: var(--ink); }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.icon-btn {
  display: inline-grid; place-items: center;
  width: 34px; height: 34px; border-radius: 8px;
  border: 0; background: transparent; color: var(--ink-2);
  font: 600 12px var(--font); cursor: pointer;
  transition: background .2s, color .2s;
}
.icon-btn:hover { background: var(--surface-2); color: var(--ink); }
.icon-btn svg { width: 18px; height: 18px; }
html[data-theme="dark"] .i-moon, html:not([data-theme="dark"]) .i-sun { display: none; }

/* ---------- Typography blocks ---------- */
.eyebrow { font-size: 14px; font-weight: 600; color: var(--accent-text); margin-bottom: 14px; }
.section { padding: 120px 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--line); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.section-head h2 { font-size: clamp(30px, 3.8vw, 44px); letter-spacing: -.02em; }
.sec-desc { margin-top: 16px; font-size: 17px; color: var(--ink-2); }
.sec-desc a { color: var(--accent-text); border-bottom: 1px solid currentColor; }
.section-head-left { text-align: left; margin: 0; }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 88px 0 72px; overflow: hidden; }
.hero::before {
  content: ''; position: absolute; inset: -20% -10% auto; height: 820px; z-index: -1;
  background:
    radial-gradient(40% 50% at 50% 38%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%),
    radial-gradient(28% 36% at 78% 58%, color-mix(in srgb, var(--blue) 7%, transparent), transparent 70%);
  pointer-events: none;
}
.hero-copy { text-align: center; max-width: 820px; }
.hero h1 { font-size: clamp(40px, 6.2vw, 72px); letter-spacing: -.03em; line-height: 1.12; }
html[lang="en"] .hero-copy { max-width: 960px; }
html[lang="en"] .hero h1 { font-size: clamp(36px, 5.4vw, 64px); text-wrap: balance; }
.lede { margin: 24px auto 0; max-width: 640px; font-size: clamp(17px, 1.6vw, 19px); color: var(--ink-2); }
.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 36px; }
.hero-meta { margin-top: 18px; font-size: 13.5px; color: var(--ink-3); }
.hero-stage { margin-top: 64px; max-width: 1040px; }

.trust {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 36px;
  margin-top: 48px; font-size: 14px; color: var(--ink-2);
}
.trust span { display: inline-flex; align-items: center; gap: 8px; }
.trust svg { width: 18px; height: 18px; color: var(--accent-text); }

/* ---------- App window (shared by demos) ----------
   演示窗口内使用 App 自身的设计令牌（Taskstick/apps/desktop/src/styles.css），
   字体、色值、圆角、动效时长与缓动与 App 一致；窗口外仍是官网令牌。 */
.app-window {
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --accent: #2E9E62;
  --accent-soft: rgba(46, 158, 98, .12);
  --accent-text: #2E9E62;
  --on-accent: #ffffff;
  --ink: #1D1D1F;
  --ink-2: #6E6E73;
  --ink-3: #AEAEB2;
  --line: rgba(0, 0, 0, .07);
  --line-2: rgba(0, 0, 0, .12);
  --fill-4: rgba(120, 120, 128, .12);
  --surface: #ffffff;
  --surface-2: #F4F4F6;
  --card: #ffffff;
  --red: #FF453A;
  --orange: #FF9F0A;
  --blue: #0A84FF;
  --gray: #8E8E93;
  --dur-fast: 120ms;
  --dur-base: 200ms;
  --dur-slow: 320ms;
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --ease-spring: cubic-bezier(.34, 1.4, .44, 1);
  position: relative;
  font-family: var(--font);
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  box-shadow: var(--shadow-win);
  overflow: hidden;
}
html[data-theme="dark"] .app-window {
  --accent: #3FCF8E;
  --accent-soft: rgba(63, 207, 142, .18);
  --accent-text: #3FCF8E;
  --on-accent: #0B2418;
  --ink: #F5F5F7;
  --ink-2: #98989D;
  --ink-3: #636366;
  --line: rgba(255, 255, 255, .09);
  --line-2: rgba(255, 255, 255, .14);
  --fill-4: rgba(120, 120, 128, .2);
  --surface: #242426;
  --surface-2: #1E1E20;
  --card: #2E2E31;
}
.win-bar {
  display: flex; align-items: center; height: 40px; padding: 0 14px;
  border-bottom: .5px solid var(--line);
  background: var(--surface);
  position: relative;
}
.lights { display: flex; gap: 8px; }
.lights i { width: 12px; height: 12px; border-radius: 50%; background: #ff5f57; }
.lights i:nth-child(2) { background: #febc2e; }
.lights i:nth-child(3) { background: #28c840; }
.win-title { position: absolute; left: 50%; transform: translateX(-50%); font-size: 13px; font-weight: 600; color: var(--ink-3); }

/* 复选框：对齐 App .check（19px 圆、1.5px 清单色描边、勾选 checkPop 120ms 弹性） */
.check {
  flex: none; width: 19px; height: 19px; border-radius: 50%;
  border: 1.5px solid var(--c, var(--ink-3));
  display: inline-grid; place-items: center;
  transition: background var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.check::after {
  content: ''; width: 10px; height: 10px; opacity: 0; transform: scale(.6);
  background: var(--on-accent);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10' fill='none' stroke='%23000' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2 5.2l2 2L8 3'/%3E%3C/svg%3E") center / contain no-repeat;
          mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 10' fill='none' stroke='%23000' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2 5.2l2 2L8 3'/%3E%3C/svg%3E") center / contain no-repeat;
}
.check.c-orange { --c: var(--orange); }
.check.c-blue { --c: var(--blue); }
.check.c-red { --c: var(--red); }
.is-done .check { background: var(--accent); border-color: var(--accent); }
.is-done .check::after { animation: checkPop var(--dur-fast) var(--ease-spring) forwards; }
@keyframes checkPop { from { opacity: 0; transform: scale(.6); } to { opacity: 1; transform: scale(1); } }
@keyframes popIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* 标题删除线：对齐 App .task-title::after（从左向右 scaleX，200ms） */
.strike { position: relative; }
.strike::after {
  content: ''; position: absolute; left: 0; right: 0; top: .68em; height: 1px;
  background: var(--ink-3); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}
.is-done .strike::after { transform: scaleX(1); }

/* 标签胶囊 / 来源圆点 / 日期：对齐 App .tagchip / .src-badge / .meta-date */
.tag { font-size: 11px; font-weight: 500; padding: 1px 7px; border-radius: 9px; background: var(--accent-soft); color: var(--accent); white-space: nowrap; line-height: 1.45; }
.sd { flex: none; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.late { color: var(--red); font-weight: 600; }

/* ---------- Demo: note ⇄ list sync ---------- */
.sync-body {
  display: grid; grid-template-columns: 1fr 72px 1fr;
  min-height: 380px;
}
.pane { padding: 18px 22px 24px; min-width: 0; }
.pane-note { background: var(--surface); }
.pane-list { background: var(--surface); }
.pane-head {
  display: flex; align-items: center; gap: 8px;
  font-size: 13.5px; font-weight: 600; color: var(--ink);
  padding-bottom: 14px; margin-bottom: 14px; border-bottom: .5px solid var(--line);
}
.pane-head svg { width: 16px; height: 16px; color: var(--ink-3); }
.pane-sub { margin-left: auto; font-size: 12px; font-weight: 500; color: var(--ink-3); }
.pane-count { font-size: 12px; color: var(--ink-3); font-weight: 500; }

/* 笔记渲染态：对齐 App 阅读态（复选框、日期高亮、标签胶囊、双链下划线） */
.md { font-size: 13.5px; line-height: 1.6; }
.md-line { position: relative; padding: 5px 8px; margin: 0 -8px; border-radius: 6px; min-height: 32px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; transition: background var(--dur-slow) var(--ease-out); }
.md-h { font-weight: 600; font-size: 15px; }
.md-p { color: var(--ink-2); }
.noteref { color: var(--accent-text); font-weight: 500; border-bottom: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); padding: 0 1px; }
.md-task { padding-left: 30px; color: var(--accent-text); transition: background var(--dur-slow) var(--ease-out), color var(--dur-base) var(--ease-out); }
.md-task .nt { position: relative; }
.md-task::before {
  content: ''; position: absolute; left: 9px; top: 50%; width: 13px; height: 13px; margin-top: -7px; box-sizing: border-box;
  border: 1.5px solid var(--accent); border-radius: 4px; transition: background var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.md-task::after {
  content: ''; position: absolute; left: 13.5px; top: 50%; width: 4px; height: 7px; margin-top: -6px;
  border: solid var(--on-accent); border-width: 0 1.7px 1.7px 0; transform: rotate(45deg) scale(.6); opacity: 0; transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-spring);
}
.md-new:not(.has-box) { padding-left: 8px; }
.md-new:not(.has-box)::before { display: none; }
.md-new.is-raw .md-typed { font-family: var(--mono); color: var(--ink-3); }
.md-date { background: color-mix(in srgb, var(--accent) 16%, transparent); border-radius: 4px; padding: 0 2px; }
.md-tag { display: inline-block; padding: 0 6px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-text); font-weight: 500; font-size: 12.5px; line-height: 1.55; }
.md-task.is-done { color: var(--ink-3); }
.md-task.is-done::before { background: var(--ink-3); border-color: var(--ink-3); }
.md-task.is-done::after { opacity: 1; transform: rotate(45deg); }
.md-task.is-done .md-date, .md-task.is-done .md-tag { background: var(--fill-4); color: var(--ink-3); }
.md-line.flash { background: var(--accent-soft); }
.md-refs { display: flex; align-items: center; gap: 8px; overflow: hidden; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); font-size: 11.5px; color: var(--ink-3); white-space: nowrap; }
.md-refs svg { width: 12px; height: 12px; }
.md-refs .refchip { padding: 1px 8px; border-radius: 8px; background: var(--fill-4); color: var(--ink-2); font-weight: 500; overflow: hidden; text-overflow: ellipsis; }
.caret { display: none; width: 2px; height: 1.1em; background: var(--accent); vertical-align: -3px; margin-left: 1px; animation: blink 1s steps(1) infinite; }
.md-new.is-typing .caret { display: inline-block; }
@keyframes blink { 50% { opacity: 0; } }

.bridge { position: relative; display: grid; place-items: center; background: var(--surface); }
.bridge-line { position: absolute; top: 20%; bottom: 20%; width: 1px; background: repeating-linear-gradient(to bottom, var(--line-2) 0 4px, transparent 4px 8px); }
.bridge::before, .bridge::after { content: ''; position: absolute; top: 0; bottom: 0; width: .5px; background: var(--line); }
.bridge::before { left: 0; } .bridge::after { right: 0; }
.bridge-chip {
  position: absolute; left: 50%; transform: translate(-50%, -50%) scale(.8);
  font-size: 11.5px; font-weight: 600; white-space: nowrap;
  padding: 3px 9px; border-radius: 999px;
  background: var(--accent); color: var(--on-accent);
  opacity: 0; transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-slow) var(--ease-spring);
}
.bridge-extract { top: 62%; }
.bridge-write { top: 42%; }
.demo-sync.s-extract .bridge-extract { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.demo-sync.s-write .bridge-write { opacity: 1; transform: translate(-50%, -50%) scale(1); }

/* 清单行：对齐 App .task（扁平行、6px 圆角、meta 11.5px） */
.tlist { list-style: none; margin: 0 -10px; padding: 0; display: grid; gap: 2px; }
.tlist li {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 6px 10px; border-radius: 6px;
  transition: background var(--dur-slow) var(--ease-out);
}
.tlist li > div { min-width: 0; }
.tlist b { display: inline-block; max-width: 100%; font-size: 14px; font-weight: 400; line-height: 1.35; transition: color var(--dur-base) var(--ease-out); }
.tlist small { display: flex; align-items: center; gap: 8px; margin-top: 3px; font-size: 11.5px; color: var(--ink-2); white-space: nowrap; }
.tlist em { font-style: normal; }
.tlist li.is-done b { color: var(--ink-3); }
.tlist li.is-new { visibility: hidden; }
.tlist li.is-new.is-in { visibility: visible; animation: popIn var(--dur-base) var(--ease-out); background: var(--accent-soft); }
.tlist li.is-new.is-in.settled { background: transparent; }

.pointer {
  position: absolute; left: 0; top: 0; width: 22px; height: 22px; z-index: 5;
  fill: var(--ink); stroke: var(--surface); stroke-width: 1.4;
  filter: drop-shadow(0 2px 3px rgba(0,0,0,.25));
  opacity: 0; transform: translate(var(--px, 70%), var(--py, 90%));
  transition: transform .9s var(--ease-out), opacity var(--dur-base);
  pointer-events: none;
}
.pointer.is-on { opacity: 1; }
.pointer.is-click { animation: click .3s; }
@keyframes click { 50% { scale: .8; } }

.toast {
  position: absolute; left: 50%; bottom: 18px; z-index: 4;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: 999px;
  background: var(--ink); color: var(--bg);
  font-size: 13px; font-weight: 600;
  box-shadow: 0 10px 30px -8px rgba(0,0,0,.35);
  opacity: 0; transform: translate(-50%, 4px);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.toast svg { width: 16px; height: 16px; color: var(--accent); stroke-width: 2.4; }
.demo-sync.s-toast .toast { opacity: 1; transform: translate(-50%, 0); }
.demo-sync.s-reset .sync-body { opacity: 0; }
.sync-body { transition: opacity var(--dur-slow) var(--ease-out); }

/* ---------- Feature rows ---------- */
.feature {
  display: grid; grid-template-columns: 5fr 7fr; gap: 72px; align-items: center;
}
.feature + .feature { margin-top: 140px; }
.feature-rev .feature-copy { order: 2; }
.kicker { display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent-text); background: var(--accent-soft); padding: 4px 10px; border-radius: 999px; margin-bottom: 18px; }
.feature h3 { font-size: clamp(26px, 2.8vw, 34px); letter-spacing: -.02em; margin-bottom: 16px; }
.feature-copy > p { color: var(--ink-2); font-size: 16.5px; }
.feature-copy strong { color: var(--ink); font-weight: 600; }
.ticks { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 12px; }
.ticks li { position: relative; padding-left: 30px; color: var(--ink); font-size: 15.5px; }
.ticks li::before {
  content: ''; position: absolute; left: 0; top: .28em; width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232a9d5f' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E") center / 12px no-repeat;
}
.feature-media { margin: 0; }
.shot {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line-2);
  box-shadow: var(--shadow-win);
  background: #fff;
}
.shot img { width: 100%; }

/* ---------- Demo: AI ----------
   对齐 App 的 AI 视图：用户消息为强调色气泡（.agent-message.user），
   思考中为 .agent-typing 三点，结果为整理草稿卡（.agent-draft-card）。 */
.ai-body { padding: 18px; display: flex; flex-direction: column; gap: 12px; min-height: 430px; background: var(--surface-2); }
.msg-user {
  align-self: flex-end; max-width: 82%;
  padding: 9px 11px; border-radius: 10px;
  background: var(--accent); color: var(--on-accent);
  font-size: 13.5px; line-height: 1.55;
  visibility: hidden;
}
.msg-label { display: block; font-size: 11px; font-weight: 600; opacity: .72; margin-bottom: 2px; }
.msg-ai {
  align-self: flex-start; display: flex; align-items: center; gap: 8px;
  padding: 9px 11px; border-radius: 10px;
  background: var(--card); box-shadow: 0 0 0 .5px var(--line);
  font-size: 13.5px; color: var(--ink-2);
  visibility: hidden;
}
.spark { width: 20px; height: 20px; border-radius: 6px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); }
.spark svg { width: 12px; height: 12px; fill: currentColor; stroke: none; }
.thinking { display: inline-flex; align-items: center; }
.thinking i { width: 4px; height: 4px; margin-left: 3px; border-radius: 999px; background: currentColor; opacity: .35; animation: agentTypingPulse 1s var(--ease-out) infinite; }
.thinking i:first-of-type { margin-left: 7px; }
.thinking i:nth-of-type(2) { animation-delay: .12s; }
.thinking i:nth-of-type(3) { animation-delay: .24s; }
@keyframes agentTypingPulse { 0%, 80%, 100% { opacity: .28; transform: translateY(0); } 35% { opacity: .9; transform: translateY(-2px); } }
.found { display: none; color: var(--ink); }

.ai-draft {
  align-self: stretch; display: grid; gap: 9px; padding: 12px; border-radius: 12px;
  background: var(--card); box-shadow: 0 0 0 .5px var(--line);
  visibility: hidden;
}
.ai-draft-title { font-size: 14px; font-weight: 700; }
.ai-draft-summary { font-size: 13px; line-height: 1.55; color: var(--ink-2); }
.ai-cards { display: grid; gap: 6px; }
.ai-card {
  min-height: 30px; display: grid; grid-template-columns: 18px minmax(0, 1fr) auto auto; align-items: center; gap: 8px;
  padding: 6px 8px; border-radius: 8px; background: var(--fill-4); font-size: 13px;
}
.ai-card b { font-weight: 400; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ai-card em { font-style: normal; font-size: 11px; color: var(--accent); white-space: nowrap; }
.ai-card small { font-size: 11px; color: var(--ink-3); white-space: nowrap; }
/* 草稿里的原生小复选框（App 用 input + accent-color） */
.mini-box { width: 14px; height: 14px; border-radius: 4px; background: var(--accent); display: grid; place-items: center; }
.mini-box::after { content: ''; width: 4px; height: 7px; margin-top: -2px; border: solid var(--on-accent); border-width: 0 1.6px 1.6px 0; transform: rotate(45deg); }
.mini-box.off { background: transparent; box-shadow: inset 0 0 0 1px var(--line-2); }
.mini-box.off::after { display: none; }
.ai-actions { display: flex; align-items: center; gap: 12px; }
.ai-toggle { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ink-2); }
.fake-btn {
  display: inline-flex; align-items: center; height: 30px; padding: 0 12px; border-radius: 8px;
  background: var(--accent); color: var(--on-accent); font-size: 12.5px; font-weight: 600;
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-base) var(--ease-out);
}
.ai-done { display: none; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600; color: var(--accent); }
.ai-done svg { width: 14px; height: 14px; stroke-width: 2.4; }

.demo-ai.s1 .msg-user { visibility: visible; animation: popIn var(--dur-base) var(--ease-out); }
.demo-ai.s2 .msg-ai { visibility: visible; animation: popIn var(--dur-base) var(--ease-out); }
.demo-ai.s3 .thinking { display: none; }
.demo-ai.s3 .found { display: inline; }
.demo-ai.s3 .ai-draft { visibility: visible; animation: popIn var(--dur-base) var(--ease-out); }
.demo-ai.s-press .fake-btn { transform: scale(.98); }
.demo-ai.s4 .fake-btn { opacity: .6; }
.demo-ai.s4 .fake-btn .t-save { display: none; }
.demo-ai:not(.s4) .fake-btn .t-saved { display: none; }
.demo-ai.s4 .ai-done { display: inline-flex; animation: popIn var(--dur-base) var(--ease-out); }
.ai-body { transition: opacity var(--dur-slow) var(--ease-out); }
.demo-ai.s-reset .ai-body { opacity: 0; }

/* ---------- Segmented tabs ----------
   对齐 App .seg：灰色轨道 + 白色滑块（阴影），滑块 200ms 弹性位移 */
.seg {
  --seg-track: rgba(120, 120, 128, .12);
  --seg-thumb: #ffffff;
  position: relative; display: inline-flex; padding: 3px; gap: 0;
  background: var(--seg-track); border-radius: 10px;
}
html[data-theme="dark"] .seg { --seg-track: rgba(120, 120, 128, .2); --seg-thumb: #5A5A5E; }
.seg button {
  position: relative; z-index: 1; border: 0; background: transparent; cursor: pointer;
  height: 34px; padding: 0 22px; border-radius: 8px;
  font: 500 14.5px var(--font); color: var(--ink-2);
  transition: color .2s;
}
.seg button:hover { color: var(--ink); }
.seg button[aria-selected="true"] { color: var(--ink); }
.seg button:active { transform: scale(.98); }
.seg-ind {
  position: absolute; top: 3px; bottom: 3px; left: 0; width: 0;
  border-radius: 8px; background: var(--seg-thumb);
  box-shadow: 0 1px 3px rgba(0,0,0,.12), 0 0 0 .5px rgba(0,0,0,.04);
  transition: transform .2s cubic-bezier(.34, 1.4, .44, 1), width .2s cubic-bezier(.34, 1.4, .44, 1);
}
.seg-sm button { height: 30px; padding: 0 16px; font-size: 13.5px; }
.views, .tour { display: grid; justify-items: center; gap: 28px; }

/* ---------- Demo: views ----------
   三个视图对齐 App：清单（TaskRow + 分组标题）、月历（.mcell / .ev-chip）、四象限（.quadrant-cell）。
   切换为 200ms 交叉淡入（App 视图切换规范）。 */
.views-window { width: 100%; max-width: 980px; }
.views-stage { position: relative; height: 560px; background: var(--surface); }
.view { position: absolute; inset: 0; padding: 18px 28px; opacity: 0; visibility: hidden; transition: opacity var(--dur-base) var(--ease-out), visibility 0s linear var(--dur-base); }
.view[hidden] { display: block; }
.view.is-active { opacity: 1; visibility: visible; transition: opacity var(--dur-base) var(--ease-out); }
.view-cal[hidden] { display: flex; }
.view-quad[hidden] { display: grid; }

/* 清单 */
.view-list { overflow: hidden; -webkit-mask: linear-gradient(to bottom, #000 82%, transparent); mask: linear-gradient(to bottom, #000 82%, transparent); }
.group-h { display: flex; align-items: baseline; gap: 8px; margin: 22px 0 6px; }
.group-h:first-child { margin-top: 4px; }
.group-h h4 { font-size: 20px; font-weight: 700; letter-spacing: -.01em; }
.group-h span { font-size: 13px; color: var(--ink-3); }
.task { display: flex; gap: 10px; align-items: flex-start; padding: 6px 10px; margin: 0 -10px; border-radius: 6px; }
.task > div { min-width: 0; }
.task b { display: block; font-size: 14px; font-weight: 400; line-height: 1.35; }
.task-meta { display: flex; align-items: center; gap: 8px; margin-top: 3px; font-size: 11.5px; color: var(--ink-2); white-space: nowrap; overflow: hidden; }
.task-meta .ex { color: var(--ink-3); font-size: 11px; overflow: hidden; text-overflow: ellipsis; }

/* 月历 */
.view-cal { display: flex; flex-direction: column; padding-top: 14px; }
.cal-head { display: flex; align-items: center; gap: 14px; margin-bottom: 10px; }
.cal-head b { font-size: 17px; font-weight: 700; }
.cal-nav { display: inline-flex; align-items: center; gap: 10px; font-size: 12px; font-weight: 500; color: var(--ink-2); }
.cal-nav i { font-style: normal; color: var(--ink-3); }
.mini-seg { margin-left: auto; display: inline-flex; padding: 2px; border-radius: 8px; background: var(--fill-4); font-size: 12px; font-weight: 500; }
.mini-seg i { font-style: normal; padding: 2px 12px; border-radius: 6px; color: var(--ink-2); }
.mini-seg i.on { background: var(--surface); color: var(--ink); box-shadow: 0 1px 3px rgba(0,0,0,.12), 0 0 0 .5px rgba(0,0,0,.04); }
html[data-theme="dark"] .mini-seg i.on { background: #5A5A5E; }
.month-dow { display: grid; grid-template-columns: repeat(7, 1fr); padding: 0 6px 4px; }
.month-dow span { font-size: 11px; font-weight: 600; color: var(--ink-3); text-align: right; }
.month-grid { flex: 1; display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); grid-template-rows: repeat(5, minmax(0, 1fr)); min-height: 0; border-top: .5px solid var(--line); border-left: .5px solid var(--line); }
.mcell { position: relative; min-width: 0; display: flex; flex-direction: column; gap: 3px; padding: 5px 6px; border-right: .5px solid var(--line); border-bottom: .5px solid var(--line); overflow: hidden; }
.mcell.dim { background: rgba(120, 120, 128, .05); }
.mcell.dim .dnum { color: var(--ink-3); }
.mcell.today { background: color-mix(in srgb, var(--accent) 9%, transparent); }
.dnum { align-self: flex-end; min-width: 21px; height: 21px; padding: 0 4px; border-radius: 11px; display: grid; place-items: center; font-size: 12px; font-weight: 600; color: var(--ink-2); }
.mcell.today .dnum { background: var(--red); color: #fff; }
.ev-chip {
  --c: var(--accent);
  flex: none; display: flex; align-items: center; gap: 5px; height: 18px; padding: 0 5px; border-radius: 4px;
  border-left: 3px solid var(--c); background: color-mix(in srgb, var(--c) 12%, transparent);
  font-size: 11px; color: var(--ink); white-space: nowrap; overflow: hidden;
}
.ev-chip .cb { flex: none; width: 11px; height: 11px; border-radius: 50%; border: 1.5px solid var(--c); }
.ev-chip span { overflow: hidden; text-overflow: ellipsis; }
.mcell-more-hint { flex: none; align-self: flex-start; white-space: nowrap; padding: 0 6px; border-radius: 999px; background: var(--fill-4); font-size: 10.5px; font-weight: 600; color: var(--ink-3); line-height: 16px; }

/* 四象限 */
.view-quad { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; gap: 12px; background: var(--surface-2); }
.quadrant-cell { --qc: var(--red); min-width: 0; background: var(--card); border-radius: 10px; box-shadow: 0 0 0 .5px var(--line); overflow: hidden; }
.quadrant-cell.q2 { --qc: var(--blue); }
.quadrant-cell.q3 { --qc: var(--orange); }
.quadrant-cell.q4 { --qc: var(--gray); }
.quadrant-head { display: flex; align-items: center; gap: 8px; padding: 10px 14px 8px; border-bottom: .5px solid var(--line); }
.quadrant-head i { width: 8px; height: 8px; border-radius: 50%; background: var(--qc); }
.quadrant-head h4 { font-size: 14px; font-weight: 700; }
.quadrant-head small { font-size: 11px; color: var(--ink-3); }
.quadrant-head em { margin-left: auto; font-style: normal; font-size: 11.5px; color: var(--ink-3); }
.quadrant-list { padding: 4px 6px; }
.quadrant-cell .task { margin: 0; padding: 5px 8px; }
.quadrant-cell .task b { font-size: 13px; }
.quadrant-cell .task-meta { gap: 5px; font-size: 10.5px; margin-top: 2px; }
.quadrant-cell .tag { font-size: 10.5px; }

/* ---------- Tour ---------- */
.tour-stage { position: relative; width: 100%; max-width: 1040px; aspect-ratio: 1280 / 800; background: #fff; }
.tour-stage img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; object-position: top center; opacity: 0; transition: opacity .2s cubic-bezier(.16, 1, .3, 1); }
.tour-stage img.is-active { opacity: 1; }

/* ---------- Cards ---------- */
.grid-6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: border-color .25s, transform .3s var(--ease), box-shadow .3s;
}
.card:hover { border-color: var(--line-2); transform: translateY(-2px); box-shadow: 0 12px 30px -16px rgba(16,32,22,.2); }
.card-ic { display: inline-grid; place-items: center; width: 42px; height: 42px; border-radius: 11px; background: var(--accent-soft); color: var(--accent-text); margin-bottom: 18px; }
.card-ic svg { width: 21px; height: 21px; }
.card h3 { font-size: 18px; margin-bottom: 8px; }
.card p { font-size: 15px; color: var(--ink-2); }
.badge { display: inline-block; margin-left: 6px; font-size: 11.5px; font-weight: 600; padding: 0 7px; border-radius: 6px; border: 1px solid var(--line-2); color: var(--ink-3); vertical-align: 1px; }

/* ---------- Principles ---------- */
.manifesto { margin: 0 auto 72px; max-width: 900px; text-align: center; }
.manifesto p { font-size: clamp(26px, 3.4vw, 40px); font-weight: 700; line-height: 1.45; letter-spacing: -.02em; }
.manifesto span { color: var(--accent-text); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.principle { padding: 28px 4px 0; border-top: 2px solid var(--ink); }
.p-num { font-family: var(--mono); font-size: 13px; color: var(--accent-text); font-weight: 500; }
.principle h3 { font-size: 20px; margin: 10px 0 10px; }
.principle p { color: var(--ink-2); font-size: 15.5px; }

/* ---------- FAQ ---------- */
.faq-wrap { display: grid; grid-template-columns: 4fr 7fr; gap: 72px; align-items: start; }
.faq details { border-bottom: 1px solid var(--line-2); }
.faq details:first-child { border-top: 1px solid var(--line-2); }
.faq summary {
  list-style: none; cursor: pointer; position: relative;
  padding: 22px 40px 22px 0; font-size: 17px; font-weight: 600;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ''; position: absolute; right: 6px; top: 50%; width: 10px; height: 10px; margin-top: -7px;
  border-right: 2px solid var(--ink-3); border-bottom: 2px solid var(--ink-3);
  transform: rotate(45deg); transition: transform .3s var(--ease);
}
.faq details[open] summary::after { transform: rotate(225deg); margin-top: -2px; }
.faq details p { padding: 0 40px 22px 0; color: var(--ink-2); font-size: 15.5px; }

/* ---------- Final CTA ---------- */
.cta-final { padding-top: 40px; }
.cta-box {
  text-align: center; padding: 72px 24px;
  border-radius: 24px; border: 1px solid var(--line);
  background:
    radial-gradient(60% 80% at 50% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 70%),
    var(--surface);
}
.cta-box img { margin: 0 auto 20px; width: 72px; height: 72px; }
.cta-box h2 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -.02em; }
.cta-box > p:not(.hero-meta) { margin-top: 16px; color: var(--ink-2); font-size: 17px; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line); padding: 56px 0 32px; font-size: 14px; }
.footer-inner { display: flex; justify-content: space-between; gap: 48px; flex-wrap: wrap; }
.footer-brand p { margin-top: 12px; color: var(--ink-3); }
.footer-brand .brand img { width: 28px; height: 28px; }
.footer-cols { display: flex; gap: 72px; }
.footer-cols h4 { font-size: 13px; color: var(--ink-3); font-weight: 600; margin-bottom: 14px; }
.footer-cols a { display: block; color: var(--ink-2); margin-bottom: 10px; transition: color .2s; }
.footer-cols a:hover { color: var(--ink); }
.footer-bottom { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--ink-3); font-size: 13px; }

/* ---------- Reveal ---------- */
html.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .8s var(--ease) var(--d, 0s), transform .8s var(--ease) var(--d, 0s); }
html.js .reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
/* ---------- 下载页 ---------- */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.dl-main { padding: 72px 0 96px; }
.dl-hero { text-align: center; }
.dl-hero img { margin: 0 auto 24px; filter: drop-shadow(0 12px 28px rgba(42,157,95,.28)); }
.dl-hero h1 { font-size: clamp(36px, 5vw, 56px); letter-spacing: -.03em; line-height: 1.15; }
.dl-board { margin-top: 56px; max-width: 880px; }
.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.download-card {
  position: relative; display: flex; flex-direction: column; gap: 10px;
  padding: 28px; border-radius: var(--radius); background: var(--surface);
  border: 1px solid var(--line); box-shadow: var(--shadow-sm);
  transition: border-color .3s, box-shadow .3s;
}
.download-card.is-recommended { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-sm); }
.download-card-head { display: flex; gap: 8px; align-items: center; font-size: 12.5px; color: var(--ink-3); }
.download-badge { font-family: var(--mono); padding: 1px 7px; border: 1px solid var(--line-2); border-radius: 6px; }
.download-recommend-badge {
  position: absolute; top: 24px; right: 24px; font-size: 12px; font-weight: 600;
  padding: 3px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-text);
}
.download-card h3 { font-size: 21px; margin-top: 4px; }
.download-card p { color: var(--ink-2); font-size: 15px; flex: 1; }
.download-facts { list-style: none; padding: 0; margin: 4px 0 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.download-facts li { font-size: 12.5px; color: var(--ink-2); background: var(--surface-2); border-radius: 6px; padding: 3px 9px; }
.download-link { justify-content: center; width: 100%; }
.dl-status { min-height: 1.6em; margin-top: 20px; text-align: center; font-size: 14px; color: var(--ink-3); transition: color .3s; }
.dl-status.is-active { color: var(--ink-2); }
.dl-help { margin-top: 96px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.dl-help article { padding-top: 24px; border-top: 1px solid var(--line-2); }
.dl-help h3 { font-size: 18px; margin: 10px 0 8px; }
.dl-help p { color: var(--ink-2); font-size: 15px; }
.dl-help a { color: var(--accent-text); }

@media (max-width: 960px) {
  .nav-links { display: none; }
  .feature, .faq-wrap { grid-template-columns: 1fr; gap: 40px; }
  .feature-rev .feature-copy { order: 0; }
  .feature + .feature { margin-top: 96px; }
  .grid-6 { grid-template-columns: 1fr 1fr; }
  .section { padding: 88px 0; }
}
@media (max-width: 720px) {
  .container { width: min(100% - 32px, 1160px); }
  .hero { padding-top: 56px; }
  .brand-cn { display: none; }
  .sync-body { grid-template-columns: 1fr; }
  .bridge { height: 44px; }
  .bridge-line { top: 8px; bottom: 8px; }
  .bridge-chip { top: 50% !important; }
  .bridge::before, .bridge::after { display: none; }
  .pointer { display: none; }
  .grid-6, .grid-3 { grid-template-columns: 1fr; }
  .views-stage { height: 520px; }
  .view { padding: 14px 16px; }
  .cal-nav, .mini-seg { display: none; }
  .mcell { padding: 3px; }
  .ev-chip { padding: 0 3px; font-size: 10px; }
  .ev-chip .cb { display: none; }
  .mcell-more-hint { display: none; }
  .view-quad { grid-template-columns: 1fr; grid-template-rows: repeat(4, auto); gap: 10px; overflow: hidden; -webkit-mask: linear-gradient(to bottom, #000 85%, transparent); mask: linear-gradient(to bottom, #000 85%, transparent); }
  .quadrant-cell .task:nth-child(n+3) { display: none; }
  .footer-cols { gap: 40px; flex-wrap: wrap; }
  .dl-grid, .dl-help { grid-template-columns: 1fr; }
  .dl-help { margin-top: 64px; }
  .seg button { padding: 0 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  html.js .reveal { opacity: 1; transform: none; }
}