@charset "UTF-8";
:root {
  --paper: #f8f9f7;
  --white: #fff;
  --ink: #172c40;
  --body: #53616d;
  --muted: #7b8790;
  --line: #dfe4e5;
  --accent: #3f6686;
  --wash: #eef2f3;
  --green: #5f8974;
  --radius: 14px;
  --sans: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color-scheme: light;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
button,
input,
select {
  font: inherit;
}
button,
a,
input,
summary {
  -webkit-tap-highlight-color: transparent;
}
button {
  cursor: pointer;
}
button,
a {
  touch-action: manipulation;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  color: inherit;
}
button:disabled {
  cursor: default;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid #8aafcf;
  outline-offset: 5px;
}
button {
  border: 0;
  background: none;
}
svg.icon {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  display: block;
  flex-shrink: 0;
}
i[data-icon] {
  display: inline-flex;
  font-style: normal;
  vertical-align: middle;
  flex-shrink: 0;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1,
h2,
h3 {
  font-weight: 520;
  letter-spacing: -0.05em;
}
p {
  color: var(--body);
}
[hidden] {
  display: none !important;
}
.wrap {
  width: min(1200px, calc(100% - 80px));
  margin: 0 auto;
}
.section-space {
  padding-top: 112px;
  padding-bottom: 112px;
}
.eyebrow {
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.16em;
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.5;
  color: var(--accent);
}
.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--green);
  border-radius: 50%;
  flex-shrink: 0;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 49px;
  padding: 0 23px;
  border-radius: 7px;
  font-size: 13px;
  font-weight: 560;
  line-height: 1.3;
  transition:
    background 0.2s,
    transform 0.2s,
    box-shadow 0.2s;
  white-space: nowrap;
}
.button:hover {
  transform: translateY(-2px);
}
.button-ink {
  background: var(--ink);
  color: white;
}
.button-ink:hover {
  background: #2d465d;
  box-shadow: 0 6px 15px #172c4014;
}
.button-small {
  min-height: 38px;
  padding: 0 16px;
  font-size: 12px;
}
.button-small svg.icon {
  width: 15px;
  height: 15px;
}
.button-full {
  width: 100%;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 550;
  line-height: 1.5;
  transition: color 0.2s;
}
.text-link:hover {
  color: var(--accent);
}
.text-link svg.icon {
  width: 16px;
  height: 16px;
  transition: transform 0.2s;
}
.text-link:hover svg.icon {
  transform: translate(2px, -2px);
}
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  padding: 0;
}
.icon-button:hover {
  background: #172c4009;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  top: -100px;
  left: 15px;
  background: var(--ink);
  color: white;
  padding: 10px;
  z-index: 100;
}
.skip-link:focus {
  top: 10px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #f8f9f7ed;
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap {
  width: min(1280px, calc(100% - 64px));
  height: 76px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
}
.wordmark {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  font-size: 21px;
  font-weight: 550;
  letter-spacing: -0.065em;
}
.wordmark b {
  font-weight: 450;
}
.wordmark-period {
  color: #7796a6;
}
.brand-mark {
  width: 32px;
  height: 32px;
  fill: currentColor;
}

.desktop-nav {
  display: flex;
  gap: 28px;
  font-size: 12px;
  font-weight: 500;
  margin-left: auto;
  margin-right: auto;
}
.desktop-nav a:hover,
.footer-top a:hover {
  color: var(--accent);
}
.nav-actions {
  display: flex;
  gap: 18px;
  align-items: center;
}
.language-switch {
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  padding: 7px 0;
}
.lang-divider {
  color: #a9b0b4;
  padding: 0 4px;
}
.github-link svg.icon {
  width: 19px;
  height: 19px;
}
.mobile-menu-toggle {
  display: none;
}
.mobile-nav {
  padding: 10px 24px 24px;
  display: grid;
  gap: 12px;
  border-top: 1px solid var(--line);
}
.hero {
  display: grid;
  grid-template-columns: 1.12fr 1fr;
  gap: 40px;
  align-items: end;
  padding-top: 76px;
  padding-bottom: 52px;
}
.hero h1 {
  font-size: clamp(54px, 5.1vw, 74px);
  line-height: 1.08;
  letter-spacing: -0.065em;
  margin-top: 20px;
  font-weight: 500;
}
.hero-emphasis {
  color: #4f758f;
}
.hero-intro {
  padding-bottom: 4px;
  max-width: 465px;
  justify-self: end;
}
.hero-intro > p:first-child {
  font-size: 17px;
  line-height: 1.75;
  max-width: 440px;
  letter-spacing: -0.015em;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 23px;
  margin-top: 25px;
  flex-wrap: wrap;
}
.hero-caption {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 10px;
  margin-top: 16px;
  color: var(--muted);
}
.caption-dot {
  color: #9aa7ac;
}
.hero-actions .button {
  font-size: 12px;
  gap: 9px;
  padding: 0 18px;
}
.hero-actions .button svg {
  width: 17px;
  height: 17px;
}
.workspace-section {
  scroll-margin-top: 18px;
}
.demo-stage {
  border-radius: 17px;
  background: #e7edf0;
  background-image:
    radial-gradient(ellipse at 10% 0%, #e6e4d8aa, transparent 52%),
    radial-gradient(ellipse at 100% 100%, #cfdee4aa, transparent 65%);
  padding: 31px 31px 0;
  border: 1px solid #dce3e5;
  overflow: hidden;
}
.demo-app {
  height: 566px;
  background: #fff;
  border: 1px solid #c8d0d6;
  border-radius: 10px;
  box-shadow:
    0 16px 40px #263b4e1a,
    0 1px 3px #263b4e12;
  display: flex;
  overflow: hidden;
  user-select: none;
}
.demo-rail {
  width: 69px;
  flex-shrink: 0;
  border-right: 1px solid #e0e5e9;
  background: #f9fafb;
  display: flex;
  flex-direction: column;
  padding: 12px 7px 8px;
}
.traffic-lights {
  display: flex;
  gap: 5px;
  justify-content: center;
  margin-bottom: 23px;
}
.traffic-lights b {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #ff6d62;
}
.traffic-lights b:nth-child(2) {
  background: #edc052;
}
.traffic-lights b:nth-child(3) {
  background: #60bd85;
}
.demo-rail button {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-height: 55px;
  border-radius: 7px;
  font-size: 8px;
  color: #6f7d89;
  padding: 6px 0;
  transition: background 0.2s;
}
.demo-rail .demo-rail-ai {
  color: #365977;
  border: 1px solid #dce4e9;
  background: #fff;
  margin-bottom: 13px;
}
.demo-rail button .icon {
  width: 19px;
  height: 19px;
}
.demo-rail button:hover,
.demo-rail button.active {
  background: #e9eff5;
  color: #31577a;
}
.demo-rail-modes {
  display: grid;
  gap: 9px;
}
.demo-rail .demo-settings {
  margin-top: auto;
}
.demo-main {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}
.demo-toolbar {
  height: 47px;
  flex-shrink: 0;
  border-bottom: 1px solid #e5e8eb;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 16px;
  font-size: 10px;
  gap: 10px;
}
.toolbar-document {
  display: flex;
  gap: 12px;
  align-items: center;
  white-space: nowrap;
  overflow: hidden;
}
.toolbar-document > span {
  overflow: hidden;
  text-overflow: ellipsis;
}
.toolbar-document .icon {
  width: 15px;
  height: 15px;
}
.toolbar-document small {
  font-size: 9px;
  color: #84909b;
}
.toolbar-icons {
  display: flex;
  align-items: center;
  gap: 13px;
}
.toolbar-icons .icon {
  width: 16px;
  height: 16px;
}
.saved-status {
  display: flex;
  gap: 5px;
  align-items: center;
  font-size: 8px;
  color: #7c8a87;
  white-space: nowrap;
}
.saved-status .status-dot {
  width: 4px;
  height: 4px;
}
.demo-document-tabs {
  height: 35px;
  background: #f4f6f8;
  display: flex;
  align-items: end;
  border-bottom: 1px solid #e0e5ea;
  flex-shrink: 0;
  padding-left: 10px;
  gap: 3px;
}
.demo-document-tabs button {
  display: flex;
  align-items: center;
  height: 29px;
  gap: 9px;
  border-radius: 5px 5px 0 0;
  font-size: 9px;
  color: #7d8a95;
  padding: 0 14px;
  border: 1px solid transparent;
  max-width: 200px;
}
.demo-document-tabs button.active {
  background: #fff;
  border-color: #dfe5e9;
  border-bottom-color: white;
  color: #3d5b73;
}
.demo-document-tabs .icon {
  width: 11px;
  height: 11px;
}
.demo-document-tabs button > span:last-child {
  margin-left: 9px;
}
.tab-plus {
  font-size: 18px;
  color: #8292a0;
  align-self: center;
  margin-left: 8px;
}
.demo-canvas {
  display: flex;
  flex: 1;
  min-height: 0;
  background: #edf0f3;
  overflow: hidden;
}
.demo-thumbnails {
  width: 119px;
  flex-shrink: 0;
  background: #fcfdfd;
  border-right: 1px solid #e2e6e9;
  overflow: hidden;
  padding: 13px 18px;
}
.thumb-nav {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: #8b9aa6;
  margin-bottom: 17px;
}
.thumb-nav .icon {
  width: 13px;
  height: 13px;
}
.thumb {
  display: block;
  width: 100%;
  padding: 0;
  margin-bottom: 16px;
}
.mini-page {
  height: 103px;
  background: #fff;
  border: 1px solid #e1e5e9;
  box-shadow: 0 2px 6px #162c3f08;
  padding: 14px 10px 10px;
  text-align: left;
}
.thumb.active .mini-page {
  outline: 2px solid #5e7c93;
  outline-offset: 1px;
}
.mini-page strong {
  font-size: 6px;
  line-height: 1.4;
  display: block;
  margin-bottom: 9px;
  letter-spacing: 0.04em;
}
.mini-page > b {
  height: 2px;
  background: #d6dce0;
  display: block;
  margin-top: 5px;
}
.mini-page > b:last-child {
  width: 60%;
}
.thumb > span {
  display: block;
  font-size: 8px;
  color: #82919e;
  margin-top: 5px;
}
.mini-chart > div {
  height: 24px;
  display: flex;
  gap: 3px;
  align-items: end;
  margin: 6px 0;
}
.mini-chart i {
  display: block;
  background: #a4b7c0;
  width: 9px;
  height: 55%;
}
.mini-chart i:nth-child(2) {
  height: 80%;
}
.mini-chart i:nth-child(3) {
  height: 65%;
}
.mini-chart i:nth-child(4) {
  height: 95%;
}
.document-area {
  flex: 1;
  min-width: 0;
  position: relative;
  overflow: hidden;
  padding: 24px 38px;
  display: flex;
  justify-content: center;
}
.demo-paper {
  background: #fff;
  width: 100%;
  max-width: 625px;
  height: 640px;
  flex-shrink: 1;
  box-shadow: 0 2px 10px #1e334d10;
  border: 1px solid #e1e5e9;
  padding: 29px 42px;
  position: relative;
  color: #263747;
  transition:
    transform 0.35s,
    box-shadow 0.35s;
}
.paper-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 5.5px;
  font-weight: 650;
  letter-spacing: 0.1em;
  color: #8c969c;
  border-bottom: 1px solid #e4e7e8;
  padding-bottom: 11px;
}
.paper-content {
  padding-top: 23px;
}
.paper-kicker {
  font-size: 7px;
  letter-spacing: 0.17em;
  color: #8a938e;
  margin-bottom: 12px;
}
.paper-content h3 {
  font-family: Georgia, 'Songti SC', serif;
  font-size: 34px;
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.045em;
  max-width: 320px;
  margin-bottom: 15px;
}
.paper-description {
  font-size: 8px;
  line-height: 1.9;
  color: #7c848b;
  max-width: 300px;
}
.paper-rule {
  display: flex;
  gap: 14px;
  font-size: 6px;
  color: #8d969c;
  margin-top: 20px;
  border-bottom: 1px solid #e6e9eb;
  padding-bottom: 16px;
}
.paper-section {
  margin-top: 23px;
}
.paper-section h4 {
  font-family: var(--sans);
  font-size: 9px;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin: 0 0 9px;
}
.paper-section p {
  font-size: 8px;
  line-height: 2;
  color: #66717a;
  margin-bottom: 9px;
  max-width: 380px;
}
.paper-section mark {
  background: #f9e9a4;
  padding: 2px 0;
  color: inherit;
  box-decoration-break: clone;
}
.paper-section .blue-underline {
  border-bottom: 1.5px solid #759bba;
}
.paper-callout {
  border-left: 2px solid #a7bdc8;
  padding: 9px 12px;
  background: #f3f6f7;
  font-size: 8px;
  line-height: 1.7;
  color: #567082;
  margin-top: 17px;
}
.paper-footer {
  display: flex;
  justify-content: space-between;
  position: absolute;
  bottom: 25px;
  left: 42px;
  right: 42px;
  border-top: 1px solid #e5e9eb;
  padding-top: 10px;
  font-size: 6px;
  color: #98a1a7;
}
.demo-zoom {
  position: absolute;
  bottom: 17px;
  left: 50%;
  transform: translateX(-50%);
  background: #ffffffee;
  box-shadow: 0 3px 14px #233b4d13;
  border: 1px solid #dfe5e8;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 8px 14px;
  font-size: 8px;
  color: #5e7283;
  white-space: nowrap;
}
.demo-zoom .icon {
  width: 11px;
  height: 11px;
}
.demo-zoom b {
  height: 11px;
  width: 1px;
  background: #dce3e6;
}
.demo-stage-label {
  height: 37px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #7f8f99;
  font-size: 8px;
}
.demo-stage-label > span {
  display: flex;
  gap: 7px;
  align-items: center;
}
.demo-stage-label .status-dot {
  width: 4px;
  height: 4px;
  background: #8d9fa5;
}
.stage-hint .icon {
  width: 11px;
  height: 11px;
}
.workspace-controls {
  padding: 22px 0 0;
  display: flex;
  justify-content: space-between;
  gap: 25px;
  align-items: center;
}
.workspace-tabs {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px;
  border: 1px solid #e0e5e7;
  border-radius: 8px;
  background: #f1f3f2;
  flex-shrink: 0;
}
.workspace-tabs button {
  padding: 9px 13px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 11px;
  color: #7b8892;
  transition:
    background 0.2s,
    box-shadow 0.2s;
}
.workspace-tabs button.active {
  background: #fff;
  color: #2d4c64;
  box-shadow: 0 1px 3px #142b3d14;
}
.workspace-tabs .icon {
  width: 14px;
  height: 14px;
}
.mode-description {
  font-size: 11px;
  max-width: 380px;
  line-height: 1.8;
  text-align: right;
  color: #7d8991;
}
.demo-contextbar {
  position: absolute;
  top: 12px;
  z-index: 2;
  background: #fff;
  box-shadow: 0 3px 12px #1c30431a;
  border: 1px solid #e2e6e9;
  border-radius: 5px;
  padding: 5px 10px;
  font-size: 8px;
  display: flex;
  gap: 11px;
  align-items: center;
}
.demo-contextbar .icon {
  width: 11px;
  height: 11px;
}
.mode-edit .paper-section p.edit-target {
  outline: 1px solid #7fa0b7;
  outline-offset: 4px;
  background: #f4f9fc;
}
.mode-annotate .paper-section {
  position: relative;
}
.annotation-bubble {
  position: absolute;
  right: -24px;
  top: 28px;
  width: 105px;
  padding: 9px;
  background: #fff8da;
  border: 1px solid #eadc9e;
  border-radius: 4px;
  box-shadow: 0 3px 10px #3e38271a;
  font-family: var(--sans);
  font-size: 7px;
  line-height: 1.7;
  z-index: 2;
}
.annotation-bubble b {
  display: block;
  font-size: 6px;
  margin-bottom: 3px;
  color: #9c8c5b;
}
.page-organizer {
  width: 100%;
  align-self: start;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding: 27px 0;
}
.organizer-card {
  display: flex;
  align-items: center;
  flex-direction: column;
  gap: 9px;
  min-width: 0;
}
.organizer-paper {
  background: #fff;
  aspect-ratio: 0.72;
  width: 100%;
  max-width: 140px;
  border: 1px solid #d6dfe4;
  padding: 22px 16px;
  box-shadow: 0 3px 8px #172c4008;
}
.organizer-paper h4 {
  font-family: Georgia, serif;
  font-size: 13px;
  line-height: 1.2;
  font-weight: 400;
  margin: 0 0 15px;
}
.organizer-paper b {
  height: 3px;
  background: #e0e6e9;
  display: block;
  margin: 8px 0;
}
.organizer-paper b:last-child {
  width: 60%;
}
.organizer-card.selected .organizer-paper {
  outline: 2px solid #6b879e;
  outline-offset: 3px;
}
.organizer-card > span {
  font-size: 9px;
  color: #718591;
}
.organizer-controls {
  grid-column: 1/-1;
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 9px;
  color: #53758e;
}
.organizer-controls button {
  display: flex;
  gap: 5px;
  align-items: center;
  padding: 6px;
  border-radius: 4px;
}
.organizer-controls button:hover {
  background: #dfe7ed;
}
.organizer-controls .icon {
  width: 13px;
  height: 13px;
}
.demo-ai-panel {
  width: 247px;
  flex-shrink: 0;
  background: #fff;
  border-left: 1px solid #dce3e8;
  padding: 16px 15px;
  font-size: 9px;
  overflow: hidden;
}
.demo-ai-heading {
  display: flex;
  gap: 7px;
  align-items: center;
  font-size: 10px;
  margin-bottom: 24px;
  color: #3a5870;
}
.demo-ai-heading .icon {
  width: 14px;
  height: 14px;
}
.demo-ai-user {
  background: #eff3f7;
  padding: 10px;
  border-radius: 7px;
  line-height: 1.7;
  margin-left: 13px;
  margin-bottom: 20px;
}
.demo-ai-answer {
  line-height: 1.9;
  color: #71818d;
}
.demo-ai-answer b {
  color: #34546c;
  font-weight: 600;
  display: block;
  margin-bottom: 10px;
}
.demo-ai-answer ol {
  padding-left: 13px;
}
.demo-ai-answer li {
  margin: 9px 0;
}
.demo-ai-citation {
  background: #edf2f6;
  color: #62809a;
  border-radius: 3px;
  font-size: 7px;
  padding: 2px 5px;
}
.demo-ai-input {
  border: 1px solid #dce5eb;
  border-radius: 6px;
  color: #a0adb6;
  padding: 11px 8px;
  margin-top: 30px;
  font-size: 8px;
}
.mode-ai .document-area {
  padding: 24px;
}
.mode-ai .demo-paper {
  padding-left: 30px;
  padding-right: 30px;
}
.mode-ai .paper-content h3 {
  font-size: 29px;
}
.mode-ai .paper-topline {
  font-size: 5px;
}
.mode-ai .paper-section p {
  font-size: 7px;
}
.mode-ai .paper-footer {
  left: 30px;
  right: 30px;
}
.principle-strip {
  display: flex;
  justify-content: space-between;
  gap: 25px;
  padding: 53px 35px 39px;
  border-bottom: 1px solid var(--line);
}
.principle-strip > div {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  color: #73828c;
}
.principle-strip .icon {
  width: 17px;
  height: 17px;
  color: #7f949e;
}
.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 50px;
  margin-bottom: 38px;
}
.section-heading h2,
.privacy-intro h2,
.faq-section h2 {
  font-size: 43px;
  line-height: 1.15;
  margin-top: 17px;
  letter-spacing: -0.05em;
}
.section-heading > p {
  font-size: 13px;
  line-height: 1.9;
  max-width: 320px;
  padding-bottom: 4px;
}
.tool-browser {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  overflow: hidden;
}
.tool-browser-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 17px 22px;
  border-bottom: 1px solid var(--line);
  gap: 20px;
}
.tool-categories {
  display: flex;
  gap: 3px;
}
.tool-categories button {
  border-radius: 5px;
  padding: 6px 12px;
  font-size: 11px;
  color: #7b8993;
  white-space: nowrap;
}
.tool-categories button.active {
  background: #edf2f5;
  color: #385a72;
}
.tool-search {
  display: flex;
  gap: 9px;
  align-items: center;
  border-left: 1px solid var(--line);
  padding-left: 18px;
  max-width: 250px;
}
.tool-search .icon {
  width: 15px;
  height: 15px;
  color: #98a4ac;
}
.tool-search input {
  background: none;
  border: 0;
  outline: none;
  font-size: 11px;
  color: var(--ink);
  width: 145px;
  padding: 7px 0;
  min-width: 0;
}
.tool-search input:focus-visible {
  outline-offset: 0;
}
.tool-search kbd {
  font-family: inherit;
  font-size: 9px;
  border: 1px solid #dfe5e8;
  border-radius: 3px;
  padding: 0 5px;
  color: #97a1a8;
}
.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  text-align: left;
  border-right: 1px solid #edf0f1;
  border-bottom: 1px solid #edf0f1;
  padding: 25px 22px 24px;
  min-height: 170px;
  transition: background 0.2s;
}
.tool-card:nth-child(4n) {
  border-right: 0;
}
.tool-card:nth-last-child(-n + 4) {
  border-bottom: 0;
}
.tool-card:hover {
  background: #f7f9f9;
}
.tool-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid #dce4e8;
  border-radius: 7px;
  color: #678194;
  background: #fafcfd;
  margin-bottom: 15px;
}
.tool-card-icon .icon {
  width: 17px;
  height: 17px;
}
.tool-card h3 {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 5px;
}
.tool-card p {
  font-size: 10px;
  line-height: 1.7;
  color: #8a969e;
  max-width: 210px;
}
.tool-card-arrow {
  position: absolute;
  right: 19px;
  top: 29px;
  opacity: 0;
  transform: translate(-3px, 3px);
  transition:
    opacity 0.2s,
    transform 0.2s;
  color: #6f8a9f;
}
.tool-card-arrow .icon {
  width: 15px;
  height: 15px;
}
.tool-card:hover .tool-card-arrow {
  opacity: 1;
  transform: none;
}
.tools-footnote {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 17px;
  font-size: 10px;
  color: #99a3a8;
}
.tools-footnote .text-link {
  font-size: 10px;
}
.tool-empty {
  text-align: center;
  padding: 60px 20px;
  font-size: 13px;
}
.assistant-section {
  background: #172c40;
  color: #f4f7fa;
  padding: 90px 0;
  overflow: hidden;
  position: relative;
}
.assistant-section:after {
  content: '';
  position: absolute;
  right: -180px;
  top: 50%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  border: 1px solid #839fb212;
  transform: translateY(-50%);
  pointer-events: none;
}
.assistant-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 100px;
  align-items: center;
}
.assistant-copy .eyebrow {
  color: #94acbe;
}
.assistant-copy .eyebrow .icon {
  width: 16px;
  height: 16px;
}
.assistant-copy h2 {
  font-size: 49px;
  line-height: 1.12;
  margin-top: 21px;
  letter-spacing: -0.05em;
}
.assistant-copy > p {
  color: #a2b2c0;
  font-size: 12px;
  line-height: 1.9;
  margin-top: 22px;
  max-width: 370px;
}
.ai-principles {
  margin-top: 29px;
  display: grid;
  gap: 21px;
}
.ai-principles > div {
  display: flex;
  gap: 18px;
  align-items: baseline;
}
.ai-principles > div > span {
  font-size: 9px;
  color: #728da3;
  font-variant-numeric: tabular-nums;
}
.ai-principles p {
  display: grid;
  gap: 3px;
}
.ai-principles b {
  font-size: 12px;
  color: #e3ebf0;
  font-weight: 500;
}
.ai-principles p > span {
  font-size: 10px;
  line-height: 1.7;
  color: #91a6b7;
  max-width: 345px;
}
.ai-example {
  border: 1px solid #dbe4ea;
  background: #fff;
  color: var(--ink);
  border-radius: 12px;
  box-shadow: 0 20px 60px #03101b26;
  transform: rotate(-1.1deg);
  overflow: hidden;
  position: relative;
  z-index: 1;
}
.ai-example-header {
  height: 65px;
  padding: 0 23px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #edf0f3;
  font-size: 13px;
  gap: 15px;
}
.ai-example-header > span:first-child {
  display: flex;
  gap: 7px;
  align-items: center;
}
.ai-example-header .icon {
  width: 18px;
  height: 18px;
  color: #628098;
}
.example-badge {
  font-size: 7px;
  letter-spacing: 0.1em;
  background: #f0f4f5;
  color: #9aa8b0;
  padding: 4px 6px;
  border-radius: 3px;
  white-space: nowrap;
}
.ai-example-tabs {
  display: flex;
  gap: 5px;
  padding: 16px 20px 0;
}
.ai-example-tabs button {
  padding: 7px 10px;
  font-size: 9px;
  border: 1px solid transparent;
  border-radius: 5px;
  color: #81919f;
}
.ai-example-tabs button.active {
  border-color: #dfe7ec;
  color: #42637c;
  background: #f6f9fa;
}
.ai-example-body {
  padding: 24px 25px;
  min-height: 300px;
}
.example-question {
  margin-left: auto;
  background: #edf2f6;
  padding: 12px 16px;
  border-radius: 8px 8px 2px 8px;
  color: #526a7e;
  font-size: 11px;
  line-height: 1.8;
  max-width: 90%;
  margin-bottom: 23px;
}
.example-answer {
  font-size: 10px;
  line-height: 1.9;
  color: #7b8b97;
}
.example-answer > strong {
  color: #36566e;
  font-weight: 600;
}
.example-answer ol {
  padding-left: 17px;
  margin: 15px 0 0;
}
.example-answer li {
  margin-bottom: 12px;
  padding-left: 3px;
}
.example-answer li b {
  color: #486579;
  font-weight: 600;
  display: block;
}
.citation {
  display: inline-block;
  background: #edf3f6;
  color: #7390a6;
  padding: 0 5px;
  border-radius: 3px;
  font-size: 8px;
  margin-left: 4px;
}
.proposed-edit {
  border: 1px solid #dce6e9;
  border-radius: 5px;
  padding: 13px;
  background: #fafcfb;
  margin-top: 13px;
}
.proposed-edit del {
  display: block;
  color: #a17a74;
  background: #fbf0ec;
  padding: 3px 6px;
}
.proposed-edit ins {
  display: block;
  color: #5b8670;
  background: #edf5ef;
  text-decoration: none;
  padding: 3px 6px;
  margin-top: 5px;
}
.proposed-edit-note {
  font-size: 8px;
  color: #8b9c92;
  margin-top: 8px;
}
.ai-example-footer {
  display: flex;
  align-items: center;
  gap: 7px;
  border-top: 1px solid #ecf0f2;
  padding: 13px 22px;
  font-size: 8px;
  color: #8f9da8;
  background: #fafcfd;
}
.ai-example-footer .icon {
  width: 12px;
  height: 12px;
}
.example-footer-right {
  margin-left: auto;
  font-size: 7px;
  color: #a1adb5;
}
.privacy-section {
  display: grid;
  grid-template-columns: 0.95fr 1fr;
  gap: 100px;
}
.privacy-intro > p {
  font-size: 13px;
  line-height: 1.9;
  max-width: 315px;
  margin-top: 22px;
  margin-bottom: 25px;
}
.privacy-intro .text-link {
  font-size: 11px;
}
.privacy-rows {
  display: grid;
  gap: 28px;
  padding-top: 5px;
}
.privacy-rows article {
  display: flex;
  gap: 19px;
  align-items: start;
}
.privacy-icon {
  width: 36px;
  height: 36px;
  border: 1px solid #dae3e6;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #698595;
  background: #f1f5f5;
}
.privacy-icon .icon {
  width: 17px;
  height: 17px;
}
.privacy-rows h3 {
  font-size: 13px;
  letter-spacing: -0.015em;
  font-weight: 550;
  margin-bottom: 7px;
}
.privacy-rows p {
  font-size: 11px;
  line-height: 1.9;
  color: #8b969d;
  max-width: 390px;
}
.download-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  background: #edf1ec;
  border: 1px solid #dde4db;
  border-radius: 12px;
  padding: 46px 40px;
}
.download-panel .eyebrow {
  font-size: 8px;
  letter-spacing: 0.13em;
  color: #829582;
}
.download-panel h2 {
  font-size: 30px;
  line-height: 1.2;
  margin-top: 9px;
  letter-spacing: -0.045em;
}
.download-panel p {
  font-size: 10px;
  color: #87948a;
  margin-top: 10px;
}
.download-emblem {
  width: 69px;
  height: 69px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 5px 14px #33492d0b;
  flex-shrink: 0;
  transform: rotate(-5deg);
}
.download-emblem svg {
  width: 43px;
  height: 43px;
  fill: none;
  stroke: #4d6b5b;
  stroke-width: 2.3;
}
.download-panel > div:nth-child(2) {
  margin-right: auto;
}
.download-panel .button {
  font-size: 11px;
  padding: 0 20px;
}
.download-panel .button .icon {
  width: 16px;
  height: 16px;
}
.faq-section {
  display: grid;
  grid-template-columns: 0.95fr 1fr;
  gap: 100px;
  padding-bottom: 100px;
}
.faq-section h2 {
  font-size: 34px;
  margin-top: 15px;
}
.faq-section > div:first-child > p {
  font-size: 11px;
  margin-top: 20px;
  margin-bottom: 6px;
  color: #8b98a0;
}
.faq-section .text-link {
  font-size: 11px;
}
.faq-list details {
  border-bottom: 1px solid var(--line);
}
.faq-list details:first-child {
  border-top: 1px solid var(--line);
}
.faq-list summary {
  padding: 20px 0;
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
}
.faq-list summary::-webkit-details-marker {
  display: none;
}
.faq-list summary .icon {
  width: 15px;
  height: 15px;
  color: #8b9ba7;
  transition: transform 0.25s;
}
.faq-list details[open] summary .icon {
  transform: rotate(45deg);
}
.faq-list details p {
  font-size: 11px;
  line-height: 1.9;
  color: #7e8e98;
  padding: 0 28px 22px 0;
}
.site-footer {
  border-top: 1px solid var(--line);
}
.footer-top {
  display: flex;
  align-items: center;
  gap: 25px;
  padding: 40px 0 32px;
}
.footer-top .wordmark {
  font-size: 18px;
}
.footer-top .brand-mark {
  width: 26px;
  height: 26px;
}
.footer-top > p {
  font-size: 10px;
  color: #8c99a0;
}
.footer-top > div {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 10px;
}
.footer-top > div a {
  display: flex;
  gap: 4px;
  align-items: center;
}
.footer-top .icon {
  width: 12px;
  height: 12px;
}
.footer-bottom {
  padding: 20px 0 25px;
  border-top: 1px solid #e8ebea;
  display: flex;
  justify-content: space-between;
  font-size: 9px;
  color: #9ca6aa;
  gap: 20px;
}
.footer-bottom > div {
  display: flex;
  align-items: center;
  gap: 24px;
}
.footer-bottom button {
  font-size: 9px;
  padding: 0;
  color: #84959f;
}
.footer-bottom button:hover {
  color: var(--ink);
}
.footer-made {
  margin-left: 8px;
  color: #a6afb3;
}
.site-dialog {
  border: 1px solid #d7e0e5;
  border-radius: 15px;
  width: min(480px, calc(100vw - 32px));
  padding: 38px;
  color: var(--ink);
  background: #fafbf9;
  box-shadow: 0 24px 100px #05172629;
  max-height: calc(100dvh - 48px);
  overflow: auto;
}
.site-dialog::backdrop {
  background: #13273d66;
  backdrop-filter: blur(7px);
}
.dialog-close {
  position: absolute;
  right: 15px;
  top: 15px;
  color: #82929d;
}
.dialog-close .icon {
  width: 18px;
  height: 18px;
}
.dialog-icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #eaf0f1;
  border: 1px solid #dce6e7;
  border-radius: 10px;
  margin-bottom: 25px;
}
.dialog-icon .icon {
  width: 25px;
  height: 25px;
}
.site-dialog .eyebrow {
  font-size: 8px;
}
.site-dialog h2 {
  font-size: 29px;
  line-height: 1.2;
  margin-top: 10px;
  letter-spacing: -0.045em;
}
.site-dialog > p {
  font-size: 11px;
  color: #85939d;
  line-height: 1.8;
  margin-top: 12px;
}
.download-details {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 13px;
  font-size: 10px;
  border-block: 1px solid var(--line);
  padding: 22px 0;
  margin: 24px 0 18px;
}
.download-details > span {
  color: #98a3a9;
}
.download-details strong {
  font-weight: 500;
}
.site-dialog p.release-notice {
  font-size: 10px;
  color: #8c8c7c;
  line-height: 1.8;
  background: #f3f2e9;
  padding: 13px;
  border-radius: 5px;
  margin-bottom: 22px;
}
.dialog-secondary {
  display: block;
  text-align: center;
  font-size: 10px;
  color: #8b9aa4;
  margin-top: 15px;
}
.tool-dialog .dialog-icon {
  margin-bottom: 19px;
}
.tool-dialog h2 {
  margin: 8px 0 13px;
}
.tool-dialog p {
  font-size: 12px;
  line-height: 1.9;
  color: #7b8d9b;
}
.tool-detail-steps {
  border-top: 1px solid var(--line);
  margin: 23px 0;
  padding: 20px 0 0;
  list-style: none;
  display: grid;
  gap: 13px;
}
.tool-detail-steps li {
  display: flex;
  align-items: start;
  gap: 13px;
  font-size: 11px;
  color: #7d8e9a;
}
.tool-detail-steps li > span {
  font-size: 9px;
  border: 1px solid #d9e3e7;
  border-radius: 4px;
  color: #68889f;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 19px;
  height: 19px;
  flex-shrink: 0;
}
.legal-dialog {
  width: min(720px, calc(100vw - 32px));
  padding: 38px;
}
.legal-dialog h2 {
  font-size: 25px;
  margin: 0 30px 25px 0;
}
.legal-dialog pre {
  font-family: var(--sans);
  font-size: 12px;
  line-height: 1.9;
  white-space: pre-wrap;
  color: #6f818f;
  overflow-wrap: anywhere;
}
.dialog-open {
  overflow: hidden;
}
html[lang='zh-CN'] h1 {
  font-size: 64px;
  line-height: 1.2;
  letter-spacing: -0.055em;
}
html[lang='zh-CN'] h2 {
  letter-spacing: -0.025em;
}
html[lang='zh-CN'] .hero-intro > p:first-child {
  font-size: 16px;
  line-height: 1.9;
}
html[lang='zh-CN'] .hero-actions {
  gap: 20px;
}
html[lang='zh-CN'] .paper-content h3 {
  font-family: Georgia, 'Songti SC', serif;
  font-size: 30px;
  line-height: 1.3;
}
html[lang='zh-CN'] .paper-section p {
  line-height: 2.1;
}
@media (min-width: 1500px) {
  .wrap {
    width: min(1240px, calc(100% - 112px));
  }
  .hero {
    padding-top: 90px;
    padding-bottom: 60px;
  }
  .demo-app {
    height: 586px;
  }
  .demo-paper {
    max-width: 645px;
  }
  .document-area {
    padding: 29px 45px;
  }
}
@media (max-width: 1100px) {
  .desktop-nav {
    gap: 17px;
  }
  .nav-actions {
    gap: 14px;
  }
  .wrap {
    width: calc(100% - 64px);
  }
  .hero {
    gap: 25px;
  }
  .hero h1 {
    font-size: 60px;
  }
  .hero-intro > p:first-child {
    font-size: 15px;
  }
  .hero-actions {
    gap: 17px;
  }
  .hero-actions .text-link {
    font-size: 11px;
  }
  .demo-stage {
    padding: 23px 23px 0;
  }
  .demo-app {
    height: 526px;
  }
  .demo-thumbnails {
    width: 100px;
    padding: 13px 15px;
  }
  .mini-page {
    height: 88px;
    padding: 12px 8px;
  }
  .document-area {
    padding: 22px 30px;
  }
  .demo-paper {
    padding: 27px 35px;
  }
  .demo-ai-panel {
    width: 210px;
    padding: 16px 12px;
  }
  .mode-ai .document-area {
    padding: 20px 17px;
  }
  .mode-ai .demo-paper {
    padding: 25px 21px;
  }
  .mode-ai .paper-content h3 {
    font-size: 25px;
  }
  .mode-ai .paper-description {
    font-size: 7px;
  }
  .mode-ai .paper-section p {
    font-size: 6.5px;
  }
  .workspace-controls {
    align-items: start;
    gap: 25px;
  }
  .mode-description {
    max-width: 260px;
    font-size: 10px;
    padding-top: 6px;
  }
  .workspace-tabs button {
    padding: 8px 10px;
    font-size: 10px;
  }
  .section-heading h2,
  .privacy-intro h2 {
    font-size: 38px;
  }
  .assistant-layout,
  .privacy-section,
  .faq-section {
    gap: 60px;
  }
  .tool-card {
    padding: 23px 19px;
  }
  .assistant-copy h2 {
    font-size: 44px;
  }
  .download-panel {
    padding: 36px 30px;
    gap: 22px;
  }
  .download-panel h2 {
    font-size: 27px;
  }
  .download-emblem {
    width: 55px;
    height: 55px;
  }
  .download-emblem svg {
    width: 35px;
    height: 35px;
  }
  .principle-strip {
    padding-inline: 5px;
  }
  .principle-strip > div {
    font-size: 10px;
    gap: 7px;
  }
  .footer-top > p {
    font-size: 9px;
  }
}
@media (max-width: 850px) {
  .nav-wrap {
    width: calc(100% - 40px);
    height: 67px;
    gap: 15px;
  }
  .desktop-nav {
    gap: 15px;
    font-size: 10px;
  }
  .nav-actions {
    gap: 13px;
  }
  .nav-download {
    display: none;
  }
  .wordmark {
    font-size: 19px;
  }
  .brand-mark {
    width: 28px;
    height: 28px;
  }
  .wrap {
    width: calc(100% - 48px);
  }
  .hero {
    padding-top: 55px;
    padding-bottom: 35px;
    gap: 30px;
    grid-template-columns: 1fr 1fr;
  }
  .hero h1 {
    font-size: 51px;
  }
  .hero-intro > p:first-child {
    font-size: 13px;
  }
  .hero-actions {
    gap: 15px;
    margin-top: 18px;
  }
  .hero-actions .button {
    min-height: 43px;
    font-size: 10px;
    padding: 0 13px;
  }
  .hero-actions .text-link {
    font-size: 10px;
  }
  .hero-caption {
    font-size: 8px;
    margin-top: 12px;
    gap: 6px;
  }
  .eyebrow {
    font-size: 8px;
    letter-spacing: 0.13em;
  }
  .demo-stage {
    padding: 18px 18px 0;
    border-radius: 12px;
  }
  .demo-app {
    height: 475px;
  }
  .demo-rail {
    width: 58px;
    padding: 11px 5px 6px;
  }
  .demo-rail button {
    font-size: 7px;
    min-height: 49px;
  }
  .demo-rail button .icon {
    width: 17px;
    height: 17px;
  }
  .traffic-lights {
    gap: 4px;
  }
  .traffic-lights b {
    width: 6px;
    height: 6px;
  }
  .demo-thumbnails {
    width: 88px;
    padding: 13px 13px;
  }
  .mini-page {
    height: 78px;
    padding: 10px 7px;
  }
  .mini-page strong {
    font-size: 5px;
    margin-bottom: 5px;
  }
  .mini-page > b {
    margin-top: 4px;
  }
  .thumb-nav .icon {
    width: 11px;
    height: 11px;
  }
  .demo-toolbar {
    height: 40px;
    padding: 0 12px;
    font-size: 9px;
  }
  .toolbar-icons {
    gap: 7px;
  }
  .saved-status {
    font-size: 7px;
  }
  .demo-document-tabs {
    height: 31px;
  }
  .demo-document-tabs button {
    font-size: 8px;
    padding: 0 10px;
    height: 26px;
  }
  .demo-document-tabs .icon {
    width: 10px;
    height: 10px;
  }
  .document-area {
    padding: 20px 25px;
  }
  .demo-paper {
    padding: 23px 29px;
  }
  .paper-content h3 {
    font-size: 29px;
  }
  .paper-topline {
    font-size: 5px;
  }
  .paper-description {
    font-size: 7px;
  }
  .paper-section p {
    font-size: 7px;
  }
  .paper-section h4 {
    font-size: 8px;
  }
  .demo-ai-panel {
    width: 190px;
    font-size: 8px;
  }
  .mode-ai .demo-thumbnails {
    display: none;
  }
  .mode-ai .paper-content h3 {
    font-size: 26px;
  }
  .demo-stage-label {
    height: 29px;
    font-size: 7px;
  }
  .stage-hint .icon {
    width: 10px;
    height: 10px;
  }
  .workspace-controls {
    display: block;
    padding-top: 17px;
  }
  .workspace-tabs {
    width: max-content;
    margin: auto;
  }
  .workspace-tabs button {
    padding: 8px 14px;
  }
  .mode-description {
    text-align: center;
    max-width: none;
    margin-top: 11px;
    font-size: 10px;
  }
  .principle-strip {
    padding: 34px 0 29px;
    gap: 16px;
    flex-wrap: wrap;
  }
  .principle-strip > div {
    font-size: 9px;
  }
  .principle-strip .icon {
    width: 15px;
    height: 15px;
  }
  .section-space {
    padding-block: 78px;
  }
  .section-heading {
    gap: 35px;
    align-items: start;
  }
  .section-heading h2,
  .privacy-intro h2 {
    font-size: 33px;
  }
  .section-heading > p {
    font-size: 11px;
    max-width: 250px;
    padding-top: 25px;
  }
  .tool-browser-bar {
    padding: 13px 14px;
    gap: 10px;
  }
  .tool-categories button {
    padding: 6px 9px;
    font-size: 10px;
  }
  .tool-search {
    padding-left: 12px;
    gap: 7px;
  }
  .tool-search input {
    width: 110px;
    font-size: 10px;
  }
  .tool-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .tool-card:nth-child(4n) {
    border-right: 1px solid #edf0f1;
  }
  .tool-card:nth-child(3n) {
    border-right: 0;
  }
  .tool-card:nth-last-child(-n + 4) {
    border-bottom: 1px solid #edf0f1;
  }
  .tool-card:nth-last-child(-n + 3) {
    border-bottom: 0;
  }
  .tool-card {
    min-height: 160px;
    padding: 22px 18px;
  }
  .tool-card h3 {
    font-size: 11px;
  }
  .tool-card p {
    font-size: 9px;
  }
  .tool-card-icon {
    margin-bottom: 13px;
  }
  .assistant-section {
    padding-block: 70px;
  }
  .assistant-layout {
    gap: 38px;
    grid-template-columns: 0.9fr 1fr;
  }
  .assistant-copy h2 {
    font-size: 36px;
  }
  .assistant-copy > p {
    font-size: 11px;
    margin-top: 17px;
  }
  .ai-principles {
    gap: 17px;
    margin-top: 23px;
  }
  .ai-principles > div {
    gap: 11px;
  }
  .ai-principles b {
    font-size: 11px;
  }
  .ai-principles p > span {
    font-size: 9px;
  }
  .ai-example-header {
    padding: 0 15px;
    height: 54px;
    font-size: 11px;
  }
  .ai-example-tabs {
    padding: 14px 13px 0;
    gap: 1px;
  }
  .ai-example-tabs button {
    font-size: 8px;
    padding: 5px 8px;
  }
  .ai-example-body {
    padding: 22px 18px;
    min-height: 310px;
  }
  .example-question {
    font-size: 10px;
    padding: 10px 12px;
    max-width: 95%;
  }
  .example-answer {
    font-size: 9px;
  }
  .ai-example-footer {
    padding: 12px 14px;
    gap: 5px;
    font-size: 7px;
  }
  .example-footer-right {
    font-size: 6px;
  }
  .privacy-section,
  .faq-section {
    grid-template-columns: 0.9fr 1fr;
    gap: 45px;
  }
  .privacy-intro > p {
    font-size: 11px;
  }
  .privacy-rows h3 {
    font-size: 11px;
  }
  .privacy-rows p {
    font-size: 10px;
  }
  .privacy-rows article {
    gap: 14px;
  }
  .privacy-icon {
    width: 31px;
    height: 31px;
    border-radius: 7px;
  }
  .privacy-icon .icon {
    width: 15px;
    height: 15px;
  }
  .privacy-rows {
    gap: 23px;
  }
  .download-panel {
    padding: 31px 26px;
    gap: 17px;
    flex-wrap: wrap;
  }
  .download-emblem {
    width: 47px;
    height: 47px;
    border-radius: 12px;
  }
  .download-emblem svg {
    width: 30px;
    height: 30px;
  }
  .download-panel h2 {
    font-size: 23px;
  }
  .download-panel .button {
    min-height: 43px;
    font-size: 10px;
    padding: 0 16px;
    margin-left: 64px;
  }
  .download-panel p {
    font-size: 9px;
  }
  .faq-section h2 {
    font-size: 29px;
  }
  .faq-list summary {
    font-size: 11px;
    padding-block: 17px;
  }
  .faq-list details p {
    font-size: 10px;
  }
  .footer-top {
    gap: 20px;
    padding-top: 30px;
  }
  .footer-top .wordmark {
    font-size: 17px;
  }
  .footer-top > p {
    font-size: 8px;
    max-width: 150px;
  }
  .footer-top > div {
    gap: 18px;
    font-size: 9px;
  }
  .footer-bottom {
    font-size: 8px;
  }
  .footer-bottom > div {
    gap: 15px;
  }
  .footer-bottom button {
    font-size: 8px;
  }
  .footer-made {
    display: none;
  }
  html[lang='zh-CN'] h1 {
    font-size: 48px;
  }
  html[lang='zh-CN'] .hero-intro > p:first-child {
    font-size: 13px;
  }
}
@media (max-width: 600px) {
  html {
    scroll-padding-top: 86px;
  }
  .wrap {
    width: calc(100% - 36px);
  }
  .nav-wrap {
    height: 63px;
    width: calc(100% - 32px);
  }
  .desktop-nav {
    display: none;
  }
  .mobile-menu-toggle {
    display: flex;
  }
  .nav-actions {
    gap: 15px;
  }
  .wordmark {
    font-size: 19px;
  }
  .language-switch {
    font-size: 10px;
  }
  .hero {
    grid-template-columns: 1fr;
    padding-top: 44px;
    padding-bottom: 31px;
    gap: 24px;
  }
  .hero h1 {
    font-size: 55px;
    line-height: 1.06;
    letter-spacing: -0.065em;
    margin-top: 16px;
  }
  .hero .eyebrow {
    font-size: 8px;
  }
  .hero-intro {
    justify-self: start;
    max-width: 365px;
    padding: 0;
  }
  .hero-intro > p:first-child {
    font-size: 13px;
    line-height: 1.85;
  }
  .hero-actions {
    gap: 19px;
    margin-top: 19px;
    flex-wrap: nowrap;
  }
  .hero-actions .button {
    min-height: 43px;
    font-size: 10px;
    gap: 6px;
    padding: 0 13px;
  }
  .hero-actions .button .icon {
    width: 14px;
    height: 14px;
  }
  .hero-actions .text-link {
    font-size: 10px;
    gap: 5px;
    white-space: nowrap;
  }
  .hero-actions .text-link .icon {
    width: 13px;
    height: 13px;
  }
  .hero-caption {
    font-size: 8px;
    margin-top: 12px;
  }
  .demo-stage {
    padding: 11px 10px 0;
    border-radius: 10px;
  }
  .demo-app {
    height: 340px;
    border-radius: 6px;
  }
  .demo-rail {
    width: 43px;
    padding: 8px 4px 5px;
  }
  .traffic-lights {
    gap: 3px;
    margin-bottom: 18px;
  }
  .traffic-lights b {
    width: 4px;
    height: 4px;
  }
  .demo-rail button {
    font-size: 5px;
    min-height: 38px;
    gap: 3px;
    border-radius: 4px;
  }
  .demo-rail button .icon {
    width: 13px;
    height: 13px;
  }
  .demo-rail .demo-rail-ai {
    margin-bottom: 8px;
  }
  .demo-rail-modes {
    gap: 5px;
  }
  .demo-toolbar {
    height: 32px;
    padding: 0 8px;
    font-size: 7px;
    gap: 4px;
  }
  .toolbar-document {
    gap: 6px;
  }
  .toolbar-document .icon {
    width: 11px;
    height: 11px;
  }
  .toolbar-document small,
  .saved-status {
    display: none;
  }
  .toolbar-icons {
    gap: 2px;
  }
  .toolbar-icons .icon {
    width: 12px;
    height: 12px;
  }
  .toolbar-icons .icon-button {
    width: 23px;
    height: 23px;
  }
  .demo-document-tabs {
    height: 26px;
    padding-left: 5px;
  }
  .demo-document-tabs button {
    font-size: 5.8px;
    height: 22px;
    gap: 5px;
    padding: 0 7px;
    max-width: 145px;
  }
  .demo-document-tabs .icon {
    width: 8px;
    height: 8px;
  }
  .demo-document-tabs button > span:last-child {
    margin-left: 4px;
  }
  .tab-plus {
    font-size: 13px;
    margin-left: 3px;
  }
  .demo-thumbnails {
    width: 52px;
    padding: 9px 8px;
  }
  .thumb-nav {
    gap: 3px;
    margin-bottom: 12px;
  }
  .thumb-nav .icon {
    width: 8px;
    height: 8px;
  }
  .mini-page {
    height: 49px;
    padding: 7px 4px;
  }
  .mini-page strong {
    font-size: 3px;
    margin-bottom: 4px;
  }
  .mini-page > b {
    height: 1px;
    margin-top: 3px;
  }
  .mini-chart > div {
    height: 12px;
    margin-block: 3px;
    gap: 2px;
  }
  .mini-chart i {
    width: 4px;
  }
  .thumb {
    margin-bottom: 11px;
  }
  .thumb > span {
    font-size: 5px;
    margin-top: 4px;
  }
  .document-area {
    padding: 13px 13px;
  }
  .demo-paper {
    height: 410px;
    padding: 18px 18px;
    max-width: none;
  }
  .paper-topline {
    font-size: 3.2px;
    padding-bottom: 7px;
  }
  .paper-content {
    padding-top: 17px;
  }
  .paper-kicker {
    font-size: 4px;
    margin-bottom: 7px;
  }
  .paper-content h3 {
    font-size: 22px;
    line-height: 1.1;
    margin-bottom: 10px;
  }
  .paper-description {
    font-size: 4.8px;
    line-height: 1.9;
  }
  .paper-rule {
    font-size: 3.8px;
    gap: 9px;
    margin-top: 12px;
    padding-bottom: 11px;
  }
  .paper-section {
    margin-top: 15px;
  }
  .paper-section h4 {
    font-size: 5.7px;
    margin-bottom: 7px;
  }
  .paper-section p {
    font-size: 5px;
    line-height: 2;
  }
  .paper-section mark {
    padding: 1px 0;
  }
  .paper-callout {
    font-size: 5px;
    padding: 7px 8px;
    margin-top: 10px;
  }
  .demo-zoom {
    font-size: 6px;
    gap: 12px;
    bottom: 11px;
    padding: 5px 9px;
  }
  .demo-zoom .icon {
    width: 8px;
    height: 8px;
  }
  .demo-zoom b {
    height: 8px;
  }
  .demo-stage-label {
    height: 25px;
    font-size: 5.6px;
    gap: 5px;
  }
  .demo-stage-label > span {
    gap: 4px;
  }
  .demo-stage-label .status-dot {
    width: 3px;
    height: 3px;
  }
  .stage-hint .icon {
    width: 8px;
    height: 8px;
  }
  .workspace-controls {
    padding-top: 13px;
  }
  .workspace-tabs {
    gap: 1px;
    padding: 3px;
    width: 100%;
    justify-content: space-between;
    border-radius: 7px;
  }
  .workspace-tabs button {
    font-size: 8px;
    padding: 8px 8px;
    gap: 4px;
    white-space: nowrap;
  }
  .workspace-tabs button .icon {
    width: 11px;
    height: 11px;
  }
  .mode-description {
    font-size: 9px;
    line-height: 1.8;
    margin: 10px auto 0;
    min-height: 32px;
    max-width: 300px;
  }
  .demo-contextbar {
    font-size: 5px;
    top: 7px;
    padding: 4px 7px;
    gap: 6px;
  }
  .demo-contextbar .icon {
    width: 8px;
    height: 8px;
  }
  .annotation-bubble {
    width: 73px;
    font-size: 5px;
    padding: 6px;
    right: -8px;
    top: 22px;
    line-height: 1.8;
  }
  .annotation-bubble b {
    font-size: 4px;
  }
  .mode-ai .document-area {
    padding: 13px 8px;
  }
  .mode-ai .demo-paper {
    padding: 16px 12px;
  }
  .mode-ai .paper-content h3 {
    font-size: 18px;
  }
  .mode-ai .paper-topline {
    font-size: 3px;
  }
  .mode-ai .paper-description {
    font-size: 4px;
  }
  .mode-ai .paper-section p {
    font-size: 4.5px;
  }
  .mode-ai .demo-ai-panel {
    width: 128px;
    padding: 12px 9px;
    font-size: 5.7px;
  }
  .demo-ai-heading {
    font-size: 7px;
    gap: 5px;
    margin-bottom: 17px;
  }
  .demo-ai-heading .icon {
    width: 10px;
    height: 10px;
  }
  .demo-ai-user {
    padding: 7px;
    margin-left: 5px;
    margin-bottom: 14px;
    border-radius: 5px;
  }
  .demo-ai-answer b {
    margin-bottom: 7px;
  }
  .demo-ai-answer ol {
    padding-left: 10px;
  }
  .demo-ai-answer li {
    margin: 7px 0;
  }
  .demo-ai-citation {
    font-size: 5px;
    padding: 1px 3px;
  }
  .demo-ai-input {
    font-size: 5px;
    padding: 8px 5px;
    margin-top: 20px;
  }
  .page-organizer {
    gap: 12px;
    padding: 22px 0;
  }
  .organizer-paper {
    padding: 14px 9px;
  }
  .organizer-paper h4 {
    font-size: 8px;
    margin-bottom: 12px;
  }
  .organizer-paper b {
    height: 2px;
    margin: 6px 0;
  }
  .organizer-card > span {
    font-size: 6px;
  }
  .organizer-controls {
    gap: 7px;
    font-size: 6px;
  }
  .organizer-controls button {
    gap: 3px;
    padding: 4px;
  }
  .organizer-controls .icon {
    width: 10px;
    height: 10px;
  }
  .principle-strip {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 19px 15px;
    padding: 29px 8px;
  }
  .principle-strip > div {
    font-size: 8px;
    gap: 8px;
  }
  .principle-strip .icon {
    width: 13px;
    height: 13px;
  }
  .section-space {
    padding-block: 58px;
  }
  .section-heading {
    display: block;
    margin-bottom: 25px;
  }
  .section-heading h2,
  .privacy-intro h2 {
    font-size: 33px;
    margin-top: 13px;
  }
  .section-heading > p {
    font-size: 11px;
    line-height: 1.9;
    max-width: 310px;
    padding-top: 16px;
  }
  .tool-browser {
    border-radius: 8px;
  }
  .tool-browser-bar {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    gap: 10px;
  }
  .tool-categories {
    gap: 3px;
    justify-content: space-between;
  }
  .tool-categories button {
    font-size: 9px;
    padding: 6px 10px;
  }
  .tool-search {
    border-left: 0;
    border-top: 1px solid #edf0f2;
    padding: 9px 0 0;
    max-width: none;
  }
  .tool-search input {
    font-size: 10px;
    flex: 1;
    width: auto;
  }
  .tool-search .icon {
    width: 13px;
    height: 13px;
  }
  .tool-search kbd {
    display: none;
  }
  .tool-grid {
    grid-template-columns: 1fr 1fr;
  }
  .tool-card {
    min-height: 153px;
    padding: 20px 16px;
  }
  .tool-card:nth-child(3n),
  .tool-card:nth-child(4n) {
    border-right: 1px solid #edf0f1;
  }
  .tool-card:nth-child(2n) {
    border-right: 0;
  }
  .tool-card:nth-last-child(-n + 3) {
    border-bottom: 1px solid #edf0f1;
  }
  .tool-card:nth-last-child(-n + 2) {
    border-bottom: 0;
  }
  .tool-card h3 {
    font-size: 10px;
  }
  .tool-card p {
    font-size: 9px;
    line-height: 1.75;
  }
  .tool-card-icon {
    width: 29px;
    height: 29px;
    margin-bottom: 13px;
    border-radius: 6px;
  }
  .tool-card-icon .icon {
    width: 15px;
    height: 15px;
  }
  .tool-card-arrow {
    right: 13px;
    top: 25px;
    opacity: 0.6;
    transform: none;
  }
  .tool-card-arrow .icon {
    width: 11px;
    height: 11px;
  }
  .tools-footnote {
    font-size: 8px;
    align-items: start;
    gap: 15px;
    line-height: 1.8;
    padding-top: 13px;
  }
  .tools-footnote .text-link {
    font-size: 8px;
    white-space: nowrap;
  }
  .tools-footnote .icon {
    width: 12px;
    height: 12px;
  }
  .assistant-section {
    padding-block: 55px;
  }
  .assistant-layout {
    grid-template-columns: 1fr;
    gap: 35px;
  }
  .assistant-copy h2 {
    font-size: 40px;
    margin-top: 17px;
  }
  .assistant-copy > p {
    font-size: 12px;
    max-width: 335px;
  }
  .ai-principles {
    margin-top: 25px;
    gap: 20px;
  }
  .ai-principles > div {
    gap: 15px;
  }
  .ai-principles b {
    font-size: 12px;
  }
  .ai-principles p > span {
    font-size: 10px;
  }
  .ai-example {
    transform: rotate(-0.65deg);
    max-width: 430px;
    width: calc(100% - 6px);
    margin: auto;
  }
  .ai-example-header {
    height: 57px;
    font-size: 12px;
    padding-inline: 19px;
  }
  .ai-example-tabs {
    padding: 14px 16px 0;
    gap: 3px;
  }
  .ai-example-tabs button {
    font-size: 9px;
    padding: 6px 10px;
  }
  .ai-example-body {
    min-height: 300px;
    padding: 22px;
  }
  .example-question {
    font-size: 11px;
  }
  .example-answer {
    font-size: 10px;
  }
  .ai-example-footer {
    font-size: 8px;
    padding-inline: 19px;
  }
  .example-footer-right {
    font-size: 7px;
  }
  .privacy-section {
    grid-template-columns: 1fr;
    gap: 35px;
  }
  .privacy-intro > p {
    max-width: 340px;
    font-size: 12px;
    margin-top: 18px;
    margin-bottom: 20px;
  }
  .privacy-rows {
    gap: 27px;
  }
  .privacy-rows article {
    gap: 17px;
  }
  .privacy-rows h3 {
    font-size: 12px;
    margin-bottom: 6px;
  }
  .privacy-rows p {
    font-size: 11px;
  }
  .privacy-icon {
    width: 35px;
    height: 35px;
    border-radius: 8px;
  }
  .privacy-icon .icon {
    width: 17px;
    height: 17px;
  }
  .download-panel {
    padding: 28px 25px;
    gap: 17px;
    border-radius: 10px;
  }
  .download-emblem {
    width: 45px;
    height: 45px;
    border-radius: 11px;
  }
  .download-panel > div:nth-child(2) {
    flex-basis: calc(100% - 62px);
  }
  .download-panel .eyebrow {
    font-size: 6.5px;
    letter-spacing: 0.1em;
  }
  .download-panel h2 {
    font-size: 24px;
    margin-top: 7px;
    line-height: 1.2;
  }
  .download-panel p {
    font-size: 8px;
    line-height: 1.8;
    margin-top: 9px;
  }
  .download-panel .button {
    margin: 3px 0 0;
    width: 100%;
    font-size: 11px;
    min-height: 44px;
  }
  .faq-section {
    grid-template-columns: 1fr;
    gap: 29px;
  }
  .faq-section h2 {
    font-size: 31px;
  }
  .faq-section > div:first-child > p {
    margin-top: 16px;
    font-size: 11px;
  }
  .faq-list summary {
    font-size: 11px;
    padding-block: 18px;
  }
  .faq-list details p {
    font-size: 11px;
  }
  .footer-top {
    flex-wrap: wrap;
    gap: 14px;
    padding: 28px 0;
  }
  .footer-top .wordmark {
    font-size: 18px;
  }
  .footer-top > p {
    font-size: 9px;
    max-width: none;
    margin-left: auto;
  }
  .footer-top > div {
    width: 100%;
    margin-left: 0;
    margin-top: 7px;
    gap: 24px;
    font-size: 10px;
  }
  .footer-bottom {
    display: block;
    font-size: 8px;
    padding: 19px 0 24px;
  }
  .footer-bottom > div {
    margin-top: 13px;
    gap: 22px;
  }
  .footer-bottom button {
    font-size: 9px;
  }
  .site-dialog {
    padding: 31px 26px;
  }
  .site-dialog h2 {
    font-size: 26px;
  }
  .legal-dialog {
    padding: 30px 24px;
  }
  .legal-dialog pre {
    font-size: 11px;
  }
  .tool-dialog h2 {
    font-size: 26px;
  }
  html[lang='zh-CN'] h1 {
    font-size: 48px;
    line-height: 1.2;
  }
  html[lang='zh-CN'] .hero-intro > p:first-child {
    font-size: 13px;
  }
  html[lang='zh-CN'] .paper-content h3 {
    font-size: 21px;
  }
  html[lang='zh-CN'] .mode-ai .paper-content h3 {
    font-size: 17px;
  }
  html[lang='zh-CN'] .hero-actions {
    gap: 14px;
  }
}
/* Keep explanatory text readable at every breakpoint; the miniature product
   illustration intentionally uses smaller type to retain its page proportions. */
.section-heading > p {
  font-size: 15px;
  max-width: 350px;
}
.tool-card h3 {
  font-size: 14px;
}
.tool-card p {
  font-size: 12px;
  color: #657581;
}
.tool-card {
  min-height: 184px;
}
.tool-categories button,
.tool-search input {
  font-size: 12px;
}
.tools-footnote {
  font-size: 11px;
  color: #6c7b86;
}
.tools-footnote .text-link {
  font-size: 11px;
}
.assistant-copy > p {
  font-size: 14px;
}
.ai-principles b {
  font-size: 14px;
}
.ai-principles p > span {
  font-size: 12px;
}
.example-question {
  font-size: 13px;
}
.example-answer {
  font-size: 12px;
}
.ai-example-body {
  min-height: 340px;
}
.privacy-intro > p {
  font-size: 14px;
}
.privacy-rows h3 {
  font-size: 15px;
}
.privacy-rows p {
  font-size: 13px;
  color: #657581;
}
.privacy-rows {
  gap: 30px;
}
.faq-list summary {
  font-size: 14px;
}
.faq-list details p {
  font-size: 13px;
  color: #657581;
}
.faq-section > div:first-child > p {
  font-size: 13px;
}
.faq-section .text-link {
  font-size: 12px;
}
.footer-top > p {
  font-size: 11px;
}
.footer-top > div {
  font-size: 11px;
}
.footer-bottom,
.footer-bottom button {
  font-size: 10px;
}
.hero-caption {
  color: #6e7d88;
}
.mode-description {
  color: #687a87;
}
@media (max-width: 850px) {
  .section-heading > p {
    font-size: 13px;
    max-width: 280px;
  }
  .tool-card h3 {
    font-size: 12px;
  }
  .tool-card p {
    font-size: 11px;
  }
  .tool-card {
    min-height: 177px;
  }
  .tool-categories button,
  .tool-search input {
    font-size: 11px;
  }
  .assistant-copy > p {
    font-size: 12px;
  }
  .ai-principles b {
    font-size: 12px;
  }
  .ai-principles p > span {
    font-size: 11px;
  }
  .example-question,
  .example-answer {
    font-size: 11px;
  }
  .privacy-intro > p {
    font-size: 13px;
  }
  .privacy-rows h3 {
    font-size: 13px;
  }
  .privacy-rows p {
    font-size: 12px;
  }
  .faq-list summary {
    font-size: 12px;
  }
  .faq-list details p {
    font-size: 12px;
  }
  .footer-top > p,
  .footer-top > div {
    font-size: 10px;
  }
  .footer-bottom,
  .footer-bottom button {
    font-size: 9px;
  }
}
@media (max-width: 600px) {
  .hero-intro > p:first-child {
    font-size: 14px;
  }
  .section-heading > p {
    font-size: 13px;
    max-width: 335px;
  }
  .tool-card h3 {
    font-size: 12px;
  }
  .tool-card p {
    font-size: 11px;
  }
  .tool-card {
    padding: 20px 15px;
    min-height: 181px;
  }
  .tools-footnote,
  .tools-footnote .text-link {
    font-size: 9px;
  }
  .assistant-copy > p {
    font-size: 13px;
  }
  .ai-principles b {
    font-size: 13px;
  }
  .ai-principles p > span {
    font-size: 12px;
  }
  .ai-example-body {
    min-height: 340px;
  }
  .example-question {
    font-size: 12px;
  }
  .example-answer {
    font-size: 11px;
  }
  .privacy-intro > p {
    font-size: 13px;
  }
  .privacy-rows h3 {
    font-size: 13px;
  }
  .privacy-rows p {
    font-size: 12px;
  }
  .faq-list summary,
  .faq-list details p {
    font-size: 12px;
  }
  .footer-top > p,
  .footer-top > div {
    font-size: 10px;
  }
  .footer-bottom,
  .footer-bottom button {
    font-size: 9px;
  }
  html[lang='zh-CN'] .hero-intro > p:first-child {
    font-size: 14px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}