@font-face {
  font-family: "MSL Editorial";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("assets/noto-serif-sc-regular-e8a27ef386c4.woff2") format("woff2");
}
:root {
  --paper: #f7f8fa;
  --white: #fff;
  --ink: #202f43;
  --muted: #647082;
  --blue: #496c91;
  --line: #dce2e9;
  --wash: #edf1f6;
  --serif: "MSL Editorial", "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 30px; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.8 var(--sans); -webkit-font-smoothing: antialiased; }
::selection { background: #d5e2ee; color: #203249; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 2px solid var(--blue); outline-offset: 6px; }
img { display: block; max-width: 100%; height: auto; }
figure, p, h1, h2, h3, dl, dd, blockquote { margin: 0; }
[hidden] { display: none !important; }
.wrap { width: min(1280px, calc(100% - 112px)); margin-inline: auto; }
.skip { position: absolute; z-index: 5; top: -100px; left: 20px; padding: 8px 16px; background: white; }
.skip:focus { top: 10px; }
.site-header { height: 96px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 600; letter-spacing: .2px; white-space: nowrap; }
.brand-light { font-weight: 400; }
.brand img { flex-shrink: 0; }
nav { display: flex; gap: 38px; align-items: center; font-size: 14px; }
nav a, .text-link, .download-meta a { transition: color .18s; }
nav a:hover, .text-link:hover, .download-meta a:hover { color: var(--blue); }
.nav-download { padding: 8px 0 8px 22px; border-left: 1px solid var(--line); }
.nav-download span { margin-left: 23px; }
.eyebrow { font-size: 13px; font-weight: 500; letter-spacing: 1.4px; color: var(--blue); }
.small-rule { display: inline-block; width: 22px; border-top: 1px solid var(--blue); vertical-align: middle; margin-right: 12px; }
.hero { padding-top: 78px; display: grid; grid-template-columns: 1.05fr 1fr; gap: 0 68px; align-items: center; }
.hero-copy { padding-block: 16px 32px; }
h1 { font: 400 clamp(44px, 4.2vw, 62px)/1.45 var(--serif); letter-spacing: -1.4px; margin-block: 28px 26px; }
h1 em { font-style: normal; color: var(--blue); }
.hero-intro { color: var(--muted); font-size: 17px; line-height: 1.95; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 35px; }
.button { display: inline-flex; min-height: 54px; align-items: center; justify-content: space-between; gap: 32px; padding: 13px 23px; background: var(--ink); color: var(--white); border: 1px solid var(--ink); border-radius: 3px; font-size: 15px; font-weight: 500; transition: background .18s, border-color .18s; }
.button:hover { background: #385572; border-color: #385572; }
.button span { font-size: 22px; line-height: 1; }
.text-link { font-size: 14px; white-space: nowrap; }
.text-link span { margin-left: 8px; }
.platform-note { display: flex; gap: 0; flex-wrap: wrap; margin-top: 18px; color: var(--muted); font-size: 12px; }
.platform-note span + span::before { content: "·"; margin-inline: 9px; color: #9ca7b4; }
.casebook { min-width: 0; background: white; border: 1px solid #d6dfe9; border-radius: 5px; box-shadow: 0 20px 45px -28px #263f6729; }
.casebook-header { display: flex; justify-content: space-between; align-items: center; padding: 21px 28px 19px; }
.casebook-header p { font-size: 17px; font-weight: 600; }
.casebook-header>span { font-size: 12px; color: var(--muted); letter-spacing: 1px; }
.case-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-inline: 28px; border-bottom: 1px solid var(--line); gap: 18px; }
.case-tabs button { appearance: none; padding: 9px 0 12px; background: none; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px; color: var(--muted); font-size: 14px; text-align: left; }
.case-tabs button[aria-selected="true"] { color: var(--blue); border-bottom-color: var(--blue); }
.case-tabs button:hover { color: var(--ink); }
.case-panels { display: grid; }
.case-panel { padding: 24px 28px 0; grid-area: 1 / 1; min-width: 0; }
/* All examples share the tallest panel's space without exposing inactive content. */
.case-panel[hidden] { display: block !important; visibility: hidden; pointer-events: none; }
.case-source { color: var(--muted); font-size: 12px; letter-spacing: 1px; }
.case-panel blockquote { font: 400 clamp(19px, 1.8vw, 25px)/1.65 var(--serif); margin-block: 12px 22px; min-height: 3.3em; }
.user-direction { padding: 13px 15px; background: #f2f5f9; border-left: 2px solid #9bb1ca; min-height: 84px; }
.user-direction>span { font-size: 12px; color: var(--blue); }
.user-direction p { font-size: 14px; line-height: 1.7; margin-top: 4px; }
.case-route { padding-block: 19px; display: grid; gap: 8px; }
.case-route>div { display: grid; grid-template-columns: 90px 1fr; gap: 12px; font-size: 14px; }
.case-route dt { color: var(--muted); }
.case-decision { display: flex; align-items: center; gap: 8px; border-top: 1px solid var(--line); padding-block: 16px; color: var(--blue); font-size: 13px; }
.status-dot { width: 6px; height: 6px; background: #729495; border-radius: 50%; flex-shrink: 0; }
.route-destination { margin-left: auto; color: var(--ink); }
.route-destination>span { margin-left: 8px; }
.casebook-caption { padding: 12px 28px; background: #f4f6f9; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.hero-foot { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: center; gap: 20px; padding-block: 48px 32px; font-size: 12px; color: var(--muted); }
.hero-foot>span { font-size: 10px; letter-spacing: 2px; }
.hero-foot p { margin-left: auto; }
.hero-foot p span { color: #aab6c3; margin-inline: 12px; }
.hero-foot>a { margin-left: 26px; font-size: 22px; }
.approach { background: #22364b; color: #f0f3f7; padding-block: 60px 55px; }
.approach-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.approach .eyebrow { color: #acbfd3; }
.approach-motto { color: #c5d3e1; font-size: 15px; }
h2 { font: 400 clamp(32px, 3vw, 43px)/1.55 var(--serif); letter-spacing: -.5px; }
.approach h2 { font-size: clamp(30px, 2.9vw, 42px); }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 44px; margin-top: 36px; padding-top: 24px; border-top: 1px solid #526275; }
.principles>div { display: grid; grid-template-columns: 26px 1fr; gap: 3px 14px; }
.index { color: var(--blue); font-size: 12px; letter-spacing: .8px; }
.principles .index { color: #9bafc4; padding-top: 3px; }
h3 { font-size: 19px; font-weight: 500; line-height: 1.6; }
.principles h3 { font-size: 17px; }
.principles p { grid-column: 2; color: #b9c9d9; font-size: 14px; }
.workspace { padding-block: 83px 68px; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 30px; margin-bottom: 38px; }
.section-heading .eyebrow { margin-bottom: 17px; }
.section-heading>p { color: var(--muted); font-size: 15px; padding-bottom: 6px; }
.workspace-grid { display: grid; grid-template-columns: 1.7fr 1fr; align-items: center; gap: 52px; }
.product-figure { min-width: 0; background: white; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.screenshot-link { display: block; position: relative; }
.screenshot-link img { width: 100%; }
.image-expand { position: absolute; right: 15px; bottom: 15px; padding: 6px 12px; font-size: 12px; background: #ffffffed; border: 1px solid var(--line); border-radius: 3px; color: var(--muted); }
.screenshot-link:hover .image-expand { color: var(--blue); border-color: #8ea5bf; }
figcaption { padding: 12px 16px; display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 11px; border-top: 1px solid var(--line); letter-spacing: .3px; }
.workspace-notes { display: grid; gap: 26px; }
.workspace-notes article + article { border-top: 1px solid var(--line); padding-top: 23px; }
.workspace-notes h3 { margin-block: 7px 8px; }
.workspace-notes p { font-size: 15px; color: var(--muted); }
.inline-tag { white-space: nowrap; color: var(--blue); }
.workspace-endnote { display: flex; gap: 22px; align-items: baseline; border-top: 1px solid var(--line); margin-top: 35px; padding-top: 24px; font-size: 14px; }
.workspace-endnote>span { flex-shrink: 0; }
.workspace-endnote>p { color: var(--muted); }
.data-section { padding-block: 10px 72px; display: grid; grid-template-columns: 1fr 1.2fr; gap: 90px; }
.data-section .eyebrow { margin-bottom: 18px; }
.data-section h2 { font-size: 33px; }
.data-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 35px; padding-top: 6px; }
.data-facts h3 { font-size: 16px; margin-bottom: 12px; }
.data-facts p { color: var(--muted); font-size: 14px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.updates { padding-block: 62px 76px; border-top: 1px solid var(--line); }
.updates-layout { display: grid; grid-template-columns: minmax(155px, .45fr) minmax(0, 1fr); gap: 72px; }
.updates-aside { padding-top: 26px; }
.updates-aside>p { font: 400 23px/1.75 var(--serif); margin-block: 14px 22px; }
.updates-aside .text-link { color: var(--blue); }
.updates-list { min-width: 0; border-top: 1px solid var(--line); }
.update-entry { border-bottom: 1px solid var(--line); }
.update-entry>summary { display: grid; grid-template-columns: minmax(0, 1fr) 24px; gap: 8px 20px; padding: 23px 0; cursor: pointer; list-style: none; }
.update-entry>summary::-webkit-details-marker, .history-archive>summary::-webkit-details-marker { display: none; }
.update-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 14px; font-size: 12px; color: var(--muted); }
.update-version { color: var(--ink); font-size: 16px; font-weight: 600; letter-spacing: .3px; }
.update-status { color: var(--blue); font-size: 11px; padding: 1px 7px; background: var(--wash); border-radius: 2px; }
.update-heading { grid-column: 1; font-size: 19px; font-weight: 500; line-height: 1.6; overflow-wrap: anywhere; }
.update-toggle { grid-column: 2; grid-row: 1 / 3; align-self: center; color: var(--blue); font-size: 22px; text-align: center; }
.update-toggle::before { content: "+"; }
.update-entry[open]>summary .update-toggle::before { content: "−"; }
.update-entry>summary:hover .update-heading { color: var(--blue); }
.update-latest>summary { padding-top: 25px; }
.update-latest .update-version { color: var(--blue); }
.update-body { padding: 0 44px 26px 0; overflow-wrap: anywhere; }
.update-intro { font-size: 15px; line-height: 1.85; }
.update-body ul { margin: 17px 0 0; padding-left: 19px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.update-body li { padding-left: 4px; }
.update-body li+li { margin-top: 9px; }
.update-body li::marker { color: #9bafc4; }
.release-source { display: inline-block; color: var(--blue); font-size: 12px; margin-top: 17px; }
.release-source:hover { text-decoration: underline; text-underline-offset: 4px; }
.history-archive { margin-top: 24px; }
.history-archive>summary { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 11px 0; cursor: pointer; font-size: 14px; color: var(--blue); list-style: none; }
.history-archive>summary>span { color: var(--muted); font-size: 12px; white-space: nowrap; }
.history-archive>summary::after { content: "＋"; }
.history-archive[open]>summary::after { content: "−"; }
.history-archive>summary>span { margin-left: auto; }
.history-note { color: var(--muted); font-size: 12px; margin: 8px 0 16px; }
.history-archive .update-status { background: transparent; padding: 0; }
.history-archive .update-heading { font-size: 17px; }
.download-section { padding-block: 65px 67px; background: #e9eef4; border-top: 1px solid #dde5ed; }
.download-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 110px; align-items: center; }
.download-copy .eyebrow { margin-bottom: 20px; letter-spacing: 2px; }
.download-copy>p:last-child { color: var(--muted); font-size: 15px; margin-top: 20px; }
.release-line { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; font-size: 21px; font-weight: 500; }
.release-arch { color: var(--muted); font-size: 15px; font-weight: 400; }
.release-version { color: var(--blue); font-size: 14px; font-weight: 400; }
.download-button { display: flex; }
.download-meta { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 16px; font-size: 12px; margin-top: 14px; color: var(--muted); }
.download-meta a { text-decoration: underline; text-underline-offset: 4px; }
.model-note { border-top: 1px solid #cbd6e1; margin-top: 24px; padding-top: 17px; }
.model-note h3 { font-size: 14px; margin-bottom: 6px; }
.model-note p { font-size: 13px; color: var(--muted); line-height: 1.8; }
.model-note strong { font-weight: 500; color: var(--ink); }
footer { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding-block: 29px; color: var(--muted); font-size: 11px; }
footer .brand { font-size: 16px; color: var(--ink); }
footer>p { font-size: 12px; }
@media (min-width: 1600px) { .hero { padding-top: 90px; gap: 0 96px; } .hero-foot { padding-top: 60px; } }
@media (max-width: 1150px) {
  .wrap { width: calc(100% - 64px); }
  .hero { gap: 0 40px; padding-top: 58px; }
  h1 { font-size: 44px; }
  .hero-intro { font-size: 16px; }
  .hero-actions { gap: 18px; }
  .button { gap: 25px; padding-inline: 19px; }
  .casebook-header, .case-panel, .casebook-caption { padding-inline: 23px; }
  .case-tabs { margin-inline: 23px; gap: 12px; }
  .case-panel blockquote { font-size: 21px; }
  .workspace-grid { gap: 34px; grid-template-columns: 1.45fr 1fr; }
  .workspace-notes { gap: 20px; }
  .workspace-notes article + article { padding-top: 17px; }
  .data-section, .download-grid { gap: 60px; }
  .data-facts { gap: 25px; }
}
@media (max-width: 900px) {
  .hero { gap: 0 28px; }
  .hero-copy .eyebrow { font-size: 12px; letter-spacing: .3px; }
  .small-rule { width: 14px; margin-right: 6px; }
  h1 { font-size: 36px; letter-spacing: -.8px; }
  .desktop-break { display: none; }
  .hero-actions { flex-wrap: wrap; gap: 15px; }
  .case-route>div { grid-template-columns: 75px 1fr; gap: 8px; font-size: 13px; }
  .case-panel blockquote { font-size: 19px; }
  .user-direction p { font-size: 13px; }
  .user-direction { min-height: 95px; }
  .casebook-caption { font-size: 11px; }
  .principles { gap: 24px; }
  .principles>div { gap: 3px 8px; grid-template-columns: 22px 1fr; }
  .section-heading>p { font-size: 14px; }
  .workspace-grid { grid-template-columns: 1fr; gap: 30px; }
  .workspace-notes { grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .workspace-notes article + article { padding: 0; border: 0; }
  .workspace-notes h3 { font-size: 17px; }
  .workspace-notes p { font-size: 14px; }
  .data-section { grid-template-columns: 1fr 1.3fr; gap: 40px; }
  .data-facts { grid-template-columns: 1fr; gap: 22px; }
  .data-facts h3 { margin-bottom: 5px; }
  .download-grid { gap: 50px; }
  .updates-layout { grid-template-columns: 155px minmax(0, 1fr); gap: 35px; }
  .updates-aside>p { font-size: 20px; }
}
@media (max-width: 680px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { height: 78px; }
  .brand { font-size: 18px; gap: 9px; }
  .brand img { width: 29px; }
  nav { gap: 0; }
  nav>a:not(.nav-download) { display: none; }
  nav>a.nav-updates { display: inline; margin-right: 19px; font-size: 12px; }
  .nav-download { border-left: 0; padding-left: 0; }
  .nav-download span { margin-left: 12px; }
  .hero { grid-template-columns: 1fr; padding-top: 40px; }
  .hero-copy { padding-block: 0 36px; }
  .hero-copy .eyebrow { font-size: 12px; letter-spacing: .8px; }
  h1 { font-size: clamp(34px, 8.5vw, 53px); margin-block: 24px 21px; }
  .hero-intro { max-width: 440px; font-size: 16px; line-height: 1.85; }
  .hero-actions { margin-top: 26px; gap: 24px; }
  .platform-note { margin-top: 16px; }
  .casebook-header, .case-panel, .casebook-caption { padding-inline: 22px; }
  .casebook-header { padding-block: 18px 13px; }
  .case-tabs { margin-inline: 22px; }
  .case-panel { padding-top: 20px; }
  .case-panel blockquote { font-size: clamp(20px, 5vw, 26px); margin-bottom: 20px; }
  .user-direction { min-height: 100px; }
  .user-direction p, .case-route>div { font-size: 14px; }
  .case-route>div { grid-template-columns: 78px 1fr; }
  .casebook-caption { font-size: 12px; }
  .hero-foot { padding-block: 27px 25px; }
  .hero-foot>span { display: none; }
  .hero-foot p { margin: 0; font-size: 11px; }
  .hero-foot p span { margin-inline: 8px; }
  .hero-foot>a { margin: 0; }
  .approach { padding-block: 38px; }
  .approach-heading { margin-bottom: 22px; align-items: baseline; }
  .approach-motto { font-size: 13px; }
  .eyebrow { font-size: 12px; }
  .approach h2 { font-size: clamp(26px, 6.3vw, 35px); line-height: 1.7; }
  .principles { grid-template-columns: 1fr; gap: 21px; margin-top: 28px; padding-top: 23px; }
  .principles>div { grid-template-columns: 25px 1fr; gap: 3px 12px; }
  .principles p { font-size: 14px; }
  .workspace { padding-block: 45px 40px; }
  h2 { font-size: 30px; }
  .section-heading { display: block; margin-bottom: 26px; }
  .section-heading>p { margin-top: 17px; font-size: 14px; }
  .section-heading .eyebrow { margin-bottom: 14px; }
  .workspace-notes { grid-template-columns: 1fr; gap: 23px; }
  .workspace-notes article + article { border-top: 1px solid var(--line); padding-top: 20px; }
  .workspace-notes h3 { font-size: 19px; }
  .workspace-notes p { font-size: 15px; }
  .image-expand { right: 9px; bottom: 9px; font-size: 11px; padding: 4px 8px; }
  figcaption { padding: 10px; font-size: 10px; gap: 5px; }
  .workspace-endnote { display: block; margin-top: 25px; padding-top: 22px; }
  .workspace-endnote>p { margin-top: 8px; }
  .data-section { grid-template-columns: 1fr; gap: 25px; padding-block: 0 43px; }
  .data-section h2 { font-size: 30px; }
  .data-facts { padding: 0; gap: 20px; }
  .data-facts h3 { font-size: 17px; margin-bottom: 7px; }
  .data-facts p { font-size: 14px; }
  .updates { padding-block: 37px 42px; }
  .updates-layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .updates-aside { display: none; }
  .update-entry>summary { padding-block: 21px; gap: 8px 14px; }
  .update-meta { gap: 7px 10px; }
  .update-heading { font-size: 18px; }
  .update-body { padding-right: 0; padding-bottom: 24px; }
  .update-body ul { font-size: 14px; padding-left: 18px; }
  .update-intro { font-size: 14px; }
  .history-archive { margin-top: 19px; }
  .history-archive>summary { gap: 9px; font-size: 13px; }
  .download-section { padding-block: 40px; }
  .download-grid { grid-template-columns: 1fr; gap: 30px; }
  .download-copy h2 { font-size: 35px; }
  .download-copy>p:last-child { margin-top: 15px; }
  .release-line { font-size: 19px; }
  .model-note p { font-size: 14px; }
  footer { flex-wrap: wrap; padding-block: 24px; gap: 15px; }
  footer>p { width: 100%; order: 3; }
  footer>.brand { font-size: 16px; }
}
@media (max-width: 360px) {
  .wrap { width: calc(100% - 32px); }
  .site-header { gap: 12px; }
  .site-header .brand { font-size: 16px; gap: 7px; }
  nav>a.nav-updates { margin-right: 12px; }
  .hero-actions { gap: 15px; }
  .hero-actions .button { font-size: 14px; padding-inline: 15px; gap: 15px; }
  .text-link { font-size: 13px; }
  h1 { font-size: 31px; }
  .casebook-header, .case-panel, .casebook-caption { padding-inline: 16px; }
  .case-tabs { margin-inline: 16px; gap: 10px; }
  .case-route>div { font-size: 13px; }
  .casebook-caption { font-size: 11px; }
}
.weixin-section { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; padding-block: 36px 76px; align-items: center; }
.weixin-copy h2 { margin-block: 15px 20px; }
.weixin-copy>p:not(.eyebrow) { color: var(--muted); max-width: 520px; }
.weixin-copy .weixin-condition { margin-top: 16px; }
.weixin-condition { font-size: 13px; line-height: 1.8; color: var(--muted); }
.weixin-example { display: grid; gap: 14px; min-width: 0; }
.weixin-message { justify-self: end; padding: 9px 18px; border-radius: 4px; background: #e4edf0; color: var(--ink); }
.weixin-reply { padding: 22px 26px; border: 1px solid var(--line); border-radius: 5px; background: var(--white); }
.weixin-reply>p:first-child { font-weight: 600; }
.weixin-reply ol { list-style-type: cjk-ideographic; columns: 2; margin-block: 12px 16px; padding-left: 2em; }
.weixin-reply li { break-inside: avoid; padding-block: 4px; font-size: 15px; }
.footer-links { display: flex; gap: 24px; font-size: 13px; color: var(--muted); }
.footer-links a:hover { color: var(--ink); }
@media (max-width: 900px) { .weixin-section { gap: 30px; } .weixin-reply ol { columns: 1; } }
@media (max-width: 680px) { .weixin-section { grid-template-columns: minmax(0, 1fr); gap: 24px; padding-block: 0 42px; } .weixin-reply { padding: 20px; } .weixin-copy h2 { font-size: 30px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; } }