:root {
  color-scheme: light;
  --paper: #f3f0e9;
  --paper-strong: #fffdf8;
  --paper-soft: #f8f5ef;
  --paper-inset: #eae4d9;
  --ink: #201f1c;
  --ink-soft: #625e55;
  --ink-faint: #8c8579;
  --line: #d8d0c4;
  --line-strong: #bdb3a5;
  --amber: #a95018;
  --amber-deep: #75360f;
  --amber-pale: #f1ded0;
  --teal: #4e7470;
  --teal-deep: #315d66;
  --teal-pale: #dfeaeb;
  --rose: #a85f55;
  --rose-deep: #7e403c;
  --rose-pale: #f0ddda;
  --slate: #58677d;
  --slate-deep: #354154;
  --slate-pale: #dfe3ea;
  --success: #3f7448;
  --success-pale: #e1eddd;
  --danger: #a84b45;
  --font: "Outfit", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--font); line-height: 1.55; transition: color .42s ease, background-color .42s ease; }
button, input { font: inherit; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }

::view-transition-old(root), ::view-transition-new(root) { animation-duration: .44s; animation-timing-function: cubic-bezier(.2,.72,.18,1); }
.site-header, .desktop-window, .family-card, .download-panel, .account-panel, .account-tab, .text-button, .icon-button, .button, .paper-preview, .window-bar, .window-sidebar, .fact, .privacy-list > div { transition: color .38s ease, background-color .38s ease, border-color .38s ease, box-shadow .32s ease; }

.site-header { height: 72px; padding: 0 clamp(20px, 5vw, 76px); display: flex; align-items: center; gap: 48px; border-bottom: 1px solid var(--line); background: rgba(255,253,248,.9); position: sticky; top: 0; z-index: 10; backdrop-filter: blur(10px); }
.brand-lockup { display: inline-flex; align-items: center; gap: 11px; min-width: 214px; }
.brand-mark { width: 38px; height: 38px; border-radius: 11px; overflow: hidden; display: block; background: var(--amber); }
.brand-mark img { width: 100%; height: 100%; display: block; }
.brand-type { display: flex; flex-direction: column; gap: 0; }
.brand-type strong { font-size: 15px; letter-spacing: .02em; }
.brand-type small { color: var(--ink-faint); font-size: 11px; }
.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a { padding: 7px 11px; color: var(--ink-soft); font-size: 13px; border-radius: 6px; transition: background .18s ease, color .18s ease; }
.site-nav a:hover { color: var(--ink); background: var(--paper-inset); }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.text-button, .icon-button { border: 1px solid var(--line); background: transparent; color: var(--ink-soft); cursor: pointer; transition: color .18s ease, background .18s ease, border-color .18s ease; }
.text-button { min-height: 32px; padding: 0 10px; border-radius: 6px; font-size: 12px; }
.icon-button { width: 32px; height: 32px; border-radius: 7px; display: grid; place-items: center; font-size: 15px; }
.text-button:hover, .icon-button:hover { color: var(--ink); background: var(--paper-inset); border-color: var(--line-strong); }

.section-wrap { width: min(1240px, calc(100% - 42px)); margin: 0 auto; }
.hero { min-height: 660px; padding: 90px 0 88px; display: grid; grid-template-columns: minmax(300px, .88fr) minmax(520px, 1.12fr); align-items: center; gap: clamp(44px, 8vw, 112px); }
.kicker { margin: 0 0 13px; color: var(--ink-faint); font-size: 10px; font-weight: 700; letter-spacing: .18em; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 520px; margin-bottom: 22px; font-size: clamp(42px, 5vw, 72px); line-height: 1.04; letter-spacing: -.035em; font-weight: 650; }
h1 em { display: block; margin-top: 9px; color: var(--amber); font-style: normal; font-size: .62em; letter-spacing: -.02em; }
.hero-lede { max-width: 500px; margin-bottom: 13px; color: var(--ink); font-size: 21px; line-height: 1.35; }
.hero-detail { max-width: 500px; margin-bottom: 28px; color: var(--ink-soft); font-size: 14px; }
.hero-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.button { min-height: 42px; padding: 0 15px; border-radius: 7px; display: inline-flex; align-items: center; justify-content: center; gap: 13px; font-size: 13px; font-weight: 600; border: 1px solid transparent; cursor: pointer; transition: transform .18s ease, background .18s ease, border-color .18s ease; }
.button:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(79, 48, 29, .14); }
.button-primary { color: #fffdf8; background: var(--amber); }
.button-primary:hover:not(:disabled) { background: var(--amber-deep); }
.button-quiet { color: var(--ink); border-color: var(--line-strong); background: transparent; }
.button-quiet:hover:not(:disabled) { background: var(--paper-inset); }
.button:disabled { opacity: .65; cursor: not-allowed; }
.hero-proof { margin-top: 32px; display: inline-flex; align-items: center; gap: 8px; color: var(--ink-faint); font-size: 11px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex: 0 0 auto; }
.status-dot-ready { background: var(--success); box-shadow: 0 0 0 0 rgba(63,116,72,.34); animation: status-pulse 2.8s ease-out infinite; }

.hero-visual { min-width: 0; will-change: transform; }
.desktop-window { border: 1px solid var(--line-strong); border-radius: 10px; overflow: hidden; background: var(--paper-strong); transform-style: preserve-3d; will-change: transform; box-shadow: 0 20px 46px rgba(72, 57, 42, .08); }
.desktop-window:hover { box-shadow: 0 28px 60px rgba(72, 57, 42, .14); }
.window-bar { height: 45px; padding: 0 16px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); background: var(--paper-soft); }
.window-brand { display: inline-flex; align-items: center; gap: 8px; font-size: 12px; }
.window-brand img { width: 21px; height: 21px; border-radius: 6px; }
.window-controls { display: inline-flex; gap: 6px; }
.window-controls i { width: 7px; height: 7px; border-radius: 50%; background: var(--line-strong); display: block; }
.window-body { min-height: 390px; display: grid; grid-template-columns: 148px 1fr; }
.window-sidebar { padding: 17px 12px; background: var(--paper-soft); border-right: 1px solid var(--line); display: flex; flex-direction: column; gap: 7px; }
.sidebar-toggle { color: var(--ink-soft); font-size: 18px; line-height: 1; padding: 0 5px 10px; }
.sidebar-label { margin: 0 4px 11px; color: var(--ink-faint); font-size: 10px; }
.sidebar-item { min-height: 32px; padding: 0 8px; display: flex; align-items: center; gap: 8px; border-radius: 5px; color: var(--ink-soft); font-size: 11px; }
.sidebar-item.active { color: var(--ink); background: var(--paper-inset); }
.sidebar-glyph { width: 16px; color: var(--amber); font-size: 14px; text-align: center; }
.sidebar-spacer { flex: 1; }
.window-content { min-width: 0; padding: 26px 28px 0; display: flex; flex-direction: column; }
.content-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; }
.mini-kicker { color: var(--ink-faint); font-size: 10px; letter-spacing: .14em; }
.content-heading h2 { margin: 5px 0 0; font-size: 23px; font-weight: 600; }
.content-action { color: var(--amber); font-size: 11px; }
.doc-tabs { margin-top: 22px; display: flex; gap: 6px; overflow: hidden; border-bottom: 1px solid var(--line); }
.doc-tab { padding: 7px 10px; color: var(--ink-faint); font-size: 10px; white-space: nowrap; border-bottom: 2px solid transparent; }
.doc-tab.active { color: var(--ink); border-color: var(--amber); }
.doc-tab b { margin-left: 7px; color: var(--ink-faint); font-weight: 400; }
.paper-preview { margin-top: 20px; padding: 24px; flex: 1; background: #fffefb; border: 1px solid var(--line); border-bottom: 0; }
.paper-meta { display: flex; align-items: center; gap: 9px; padding-bottom: 19px; border-bottom: 1px solid var(--line); }
.file-badge { width: 27px; height: 27px; display: grid; place-items: center; color: #fff; background: var(--amber); border-radius: 6px; font-size: 9px; font-weight: 700; }
.paper-meta b, .paper-meta small { display: block; }
.paper-meta b { font-size: 12px; }
.paper-meta small { color: var(--ink-faint); font-size: 10px; }
.paper-line { height: 7px; margin-top: 13px; border-radius: 4px; background: #e8e2d8; }
.paper-line.long { width: 92%; }.paper-line.medium { width: 72%; }.paper-line.short { width: 42%; }
.paper-heading { margin-top: 27px; color: var(--ink); font-size: 18px; font-weight: 600; }
.window-status { min-height: 35px; padding: 0 7px; display: flex; align-items: center; justify-content: space-between; color: var(--ink-faint); font-size: 10px; }
.status-lock { color: var(--teal-deep); }
.visual-caption { margin-top: 11px; display: flex; justify-content: space-between; color: var(--ink-faint); font-size: 10px; }

.section-rule { padding: 68px 0 82px; border-top: 1px solid var(--line); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 28px; margin-bottom: 28px; }
.section-head h2 { max-width: 690px; margin: 0; font-size: clamp(26px, 3vw, 39px); line-height: 1.14; font-weight: 600; letter-spacing: -.03em; }
.section-note { color: var(--ink-faint); font-size: 12px; }
.family-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); grid-auto-flow: dense; gap: 11px; }
.family-card { min-height: 230px; padding: 19px; border: 1px solid var(--line); border-top: 4px solid var(--accent); border-radius: 8px; background: var(--paper-strong); display: flex; flex-direction: column; transform-style: preserve-3d; will-change: transform; }
.family-card:hover { border-color: var(--accent); box-shadow: 0 18px 38px rgba(61, 52, 42, .1); }
.family-card img { width: 50px; height: 50px; border-radius: 13px; margin-bottom: 22px; transition: transform .48s cubic-bezier(.16,.78,.26,1); }.family-card:hover img { transform: scale(1.08) translateY(-2px); }
.family-card h3 { margin-bottom: 4px; font-size: 17px; font-weight: 650; }
.family-card p { min-height: 48px; margin-bottom: 17px; color: var(--ink-soft); font-size: 12px; line-height: 1.5; }
.family-card .card-status { margin-top: auto; display: inline-flex; align-items: center; gap: 6px; color: var(--accent-deep); font-size: 11px; }
.family-card.docs { --accent: var(--amber); --accent-deep: var(--amber-deep); }.family-card.connect { --accent: var(--teal); --accent-deep: var(--teal-deep); }.family-card.audio { --accent: var(--rose); --accent-deep: var(--rose-deep); }.family-card.clips { --accent: var(--slate); --accent-deep: var(--slate-deep); }
.card-status .status-dot { width: 7px; height: 7px; background: var(--accent); }
.card-status.planned .status-dot { background: var(--line-strong); }

.docs-layout { display: grid; grid-template-columns: minmax(280px, .82fr) minmax(420px, 1.18fr); gap: 80px; align-items: start; }
.docs-intro p { max-width: 460px; margin-bottom: 23px; color: var(--ink-soft); font-size: 15px; }
.inline-link { color: var(--amber-deep); font-size: 13px; font-weight: 600; }
.inline-link:hover { color: var(--amber); }
.docs-facts { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.fact { min-height: 91px; padding: 15px 17px 15px 0; border-bottom: 1px solid var(--line); }.fact:nth-child(even) { padding-left: 17px; border-left: 1px solid var(--line); }
.fact span { display: block; margin-bottom: 7px; color: var(--ink-faint); font-size: 11px; }.fact strong { display: block; font-size: 13px; font-weight: 600; }
.format-strip { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 8px; }.format-chip { min-height: 29px; padding: 4px 9px; border-radius: 5px; color: #fff; font-size: 10px; font-weight: 700; letter-spacing: .04em; }.format-chip.pdf { background: #c94c45; }.format-chip.word { background: #3a72b8; }.format-chip.sheet { background: #357a54; }.format-chip.slide { background: #b85b3a; }.format-chip.text { background: #7563af; }.format-chip.image { background: #a85b26; }

.download-panel { padding: 31px 34px; display: grid; grid-template-columns: minmax(0, 1fr) 230px; gap: 40px; border: 1px solid var(--line-strong); border-radius: 9px; background: var(--paper-strong); transform-style: preserve-3d; will-change: transform; }
.download-panel:hover { box-shadow: 0 18px 38px rgba(61, 52, 42, .08); }
.download-copy h2 { margin-bottom: 11px; font-size: 31px; font-weight: 600; }.download-copy > p { max-width: 590px; margin-bottom: 24px; color: var(--ink-soft); font-size: 13px; }
.download-meta { display: flex; flex-wrap: wrap; gap: 28px; }.download-meta span, .download-meta strong { display: block; }.download-meta span { margin-bottom: 3px; color: var(--ink-faint); font-size: 10px; }.download-meta strong { font-size: 13px; font-weight: 600; }
.download-action { padding-left: 24px; border-left: 1px solid var(--line); display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 12px; }.download-action img { width: 56px; height: 56px; border-radius: 15px; }.download-note { color: var(--ink-faint); font-size: 10px; line-height: 1.45; }

.account-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }.account-tab { min-height: 33px; padding: 0 12px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink-soft); background: transparent; cursor: pointer; font-size: 12px; }.account-tab:hover, .account-tab.active { color: var(--ink); background: var(--paper-inset); border-color: var(--line-strong); }
.account-panel { min-height: 214px; padding: 27px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper-strong); }.account-panel h3 { margin-bottom: 8px; font-size: 19px; font-weight: 600; }.account-panel p { max-width: 640px; margin-bottom: 18px; color: var(--ink-soft); font-size: 13px; }.account-form { max-width: 430px; display: grid; gap: 9px; }.account-form label { color: var(--ink-faint); font-size: 11px; }.account-form input { height: 36px; padding: 0 10px; border: 1px solid var(--line); border-radius: 5px; outline: 0; color: var(--ink); background: var(--paper-soft); }.account-form input:focus { border-color: var(--teal); }.account-form .button { justify-self: start; margin-top: 4px; }.account-footnote { margin-top: 12px; color: var(--ink-faint); font-size: 11px; }.state-line { display: flex; align-items: flex-start; gap: 11px; }.state-line .status-dot { margin-top: 7px; }.state-line strong { display: block; margin-bottom: 4px; font-size: 14px; }.state-line span { color: var(--ink-soft); font-size: 12px; }.state-line.error .status-dot { background: var(--danger); }.state-line.offline .status-dot { background: var(--line-strong); }
.form-error { margin-top: 15px; color: var(--danger) !important; display: flex; align-items: center; gap: 8px; }.form-error .status-dot { background: var(--danger); }

.privacy { display: grid; grid-template-columns: minmax(280px, .88fr) minmax(420px, 1.12fr); gap: 80px; }.privacy-copy h2 { max-width: 510px; margin-bottom: 14px; font-size: 31px; line-height: 1.15; font-weight: 600; }.privacy-copy p { max-width: 500px; color: var(--ink-soft); font-size: 14px; }.privacy-list { border-top: 1px solid var(--line); }.privacy-list > div { min-height: 76px; padding: 14px 0; display: grid; grid-template-columns: 34px 1fr; column-gap: 12px; border-bottom: 1px solid var(--line); }.privacy-list span { color: var(--ink-faint); font-size: 11px; }.privacy-list strong { font-size: 14px; font-weight: 600; }.privacy-list p { grid-column: 2; margin: 3px 0 0; color: var(--ink-soft); font-size: 12px; }
.site-footer { width: min(1240px, calc(100% - 42px)); margin: 0 auto; padding: 25px 0 33px; display: flex; justify-content: space-between; color: var(--ink-faint); font-size: 11px; }.site-footer a:hover { color: var(--ink); }.footer-sep { padding: 0 10px; }

body.dark { color-scheme: dark; --paper: #292825; --paper-strong: #33312d; --paper-soft: #302e2a; --paper-inset: #3b3833; --ink: #f7f1e8; --ink-soft: #c2baae; --ink-faint: #a19a8f; --line: #4b4740; --line-strong: #625b51; --amber-pale: #4b3326; --success-pale: #2e4231; }
body.dark .site-header { background: rgba(51,49,45,.92); } body.dark .paper-preview { background: #f0ede5; color: #201f1c; } body.dark .paper-preview .paper-meta b { color: #201f1c; } body.dark .paper-heading { color: #201f1c; } body.dark .paper-line { background: #d8d0c4; } body.dark .window-status { color: var(--ink-faint); }

@keyframes status-pulse { 0%, 62% { box-shadow: 0 0 0 0 rgba(63,116,72,.34); } 100% { box-shadow: 0 0 0 8px rgba(63,116,72,0); } }

@media (max-width: 980px) { .site-header { gap: 20px; }.site-nav { gap: 0; }.hero { grid-template-columns: 1fr; padding-top: 70px; }.hero-copy { max-width: 680px; }.hero-visual { max-width: 760px; }.family-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }.docs-layout, .privacy { gap: 42px; }.download-panel { grid-template-columns: 1fr 200px; } }
@media (max-width: 640px) { .site-header { height: 64px; padding: 0 17px; gap: 10px; }.brand-lockup { min-width: 0; }.brand-type small, .site-nav { display: none; }.header-actions { gap: 7px; }.section-wrap, .site-footer { width: min(100% - 32px, 1240px); }.hero { min-height: auto; padding: 57px 0 54px; gap: 38px; }.hero-lede { font-size: 18px; }.hero-detail { font-size: 13px; }.hero-visual { width: 100%; }.window-body { grid-template-columns: 46px 1fr; }.window-sidebar { padding: 17px 8px; align-items: center; }.sidebar-label, .sidebar-item span:last-child { display: none; }.sidebar-item { padding: 0; width: 30px; justify-content: center; }.sidebar-toggle { padding: 0 0 12px; }.window-content { padding: 21px 15px 0; }.content-heading h2 { font-size: 20px; }.content-action { font-size: 10px; }.paper-preview { padding: 16px; }.section-rule { padding: 51px 0 57px; }.section-head { display: block; }.section-note, .availability { display: inline-flex; margin-top: 10px; }.family-grid { grid-template-columns: 1fr; }.family-card { min-height: 190px; }.docs-layout, .privacy { grid-template-columns: 1fr; gap: 30px; }.docs-facts { grid-template-columns: 1fr; }.fact:nth-child(even) { padding-left: 0; border-left: 0; }.download-panel { padding: 24px 20px; grid-template-columns: 1fr; gap: 25px; }.download-action { padding-left: 0; padding-top: 22px; border-left: 0; border-top: 1px solid var(--line); }.download-meta { gap: 15px 24px; }.account-panel { padding: 22px 18px; }.site-footer { padding-bottom: 22px; display: block; }.site-footer > span:last-child { display: block; margin-top: 6px; } }
@media (hover: none) { .desktop-window:hover, .family-card:hover, .download-panel:hover { box-shadow: none; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; } }