:root {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #172e27;
  background: #f8faf7;
  font-synthesis: none;
  --green: #18594a;
  --muted: #65766c;
  --line: #dce5de;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
button, a, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
a:focus-visible, summary:focus-visible { outline: 3px solid #c18a30; outline-offset: 5px; }
img { max-width: 100%; }
.shell { max-width: 1200px; margin: auto; padding: 0 32px; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 5; padding: 12px 20px; background: var(--green); color: #fff; border-radius: 8px; }
.skip-link:focus { top: 12px; }
.nav { min-height: 94px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.brand { font-weight: 800; font-size: 24px; letter-spacing: -1px; display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-image { width: 40px; height: 40px; object-fit: contain; }
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 13px; }
.nav-links a { transition: color .15s; }
.nav-links a:hover { color: var(--green); }
.nav-links .nav-download { background: #e8efe5; color: var(--green); padding: 11px 16px; border-radius: 7px; font-weight: 650; }
.nav-download span { margin-left: 10px; }
.hero { padding: 74px 0 64px; display: grid; grid-template-columns: .93fr 1.07fr; gap: 38px; align-items: center; }
.hero-copy { position: relative; z-index: 1; }
.eyebrow { font-size: 12px; font-weight: 650; color: var(--green); letter-spacing: .08em; display: flex; gap: 9px; align-items: center; }
.eyebrow::before { content: ''; width: 6px; height: 6px; flex-shrink: 0; background: #66a486; border-radius: 50%; }
h1 { font-size: clamp(40px, 4.5vw, 58px); font-weight: 750; letter-spacing: -.055em; line-height: 1.23; margin: 24px 0; }
h1 em { font-style: normal; color: #327d60; }
.lead { font-size: 16px; line-height: 1.95; color: var(--muted); margin: 0; }
.source-tools { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 20px; }
.source-tools span { color: #586d60; font-size: 10px; padding: 5px 8px; border: 1px solid #dde7dc; border-radius: 5px; background: #f1f5ee; }
.actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin: 30px 0 18px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 17px; border: 1px solid transparent; border-radius: 8px; padding: 14px 20px; background: var(--green); color: #fff; font-size: 14px; font-weight: 650; line-height: 1.5; transition: background .15s, transform .15s, box-shadow .15s; }
.button:hover { transform: translateY(-2px); background: #104839; box-shadow: 0 5px 16px #173f3518; }
.button.secondary { background: transparent; border-color: #cedbcd; color: var(--green); }
.button.secondary:hover { background: #edf3e9; }
.trust-list { display: flex; flex-wrap: wrap; gap: 18px; margin: 0; padding: 0; list-style: none; color: var(--muted); font-size: 12px; }
.trust-list li::before { content: '✓'; color: #418265; margin-right: 6px; }
.hero-art { position: relative; min-width: 0; padding: 30px 0 54px; display: grid; grid-template-columns: repeat(25, minmax(0, 1fr)); align-items: start; isolation: isolate; }
.hero-art::before { content: ''; position: absolute; z-index: -1; inset: 30px -14px 0 -10px; background: radial-gradient(ellipse at 55% 50%, #dfead9 0, #eef3e7 45%, #f8faf700 72%); }
.art-label { position: absolute; top: 0; right: 4px; color: #72917c; font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: .06em; }
.source-card, .chat-card { margin: 0; border: 1px solid #d6dfd6; border-radius: 11px; background: #fff; overflow: hidden; box-shadow: 0 16px 42px #223c3014; }
.source-card { grid-column: 1 / 20; grid-row: 1; transform: rotate(-3deg); margin-top: 4px; }
.chat-card { grid-column: 7 / -1; grid-row: 1; z-index: 1; margin-top: 84px; box-shadow: 0 24px 48px #173f3524; }
.card-bar { min-height: 37px; padding: 10px 12px; display: flex; justify-content: space-between; gap: 6px; align-items: center; font-size: 10px; color: #536b5d; background: #f1f6ef; font-weight: 600; }
.chat-card .card-bar { color: #fff; background: var(--green); }
.card-kind { white-space: nowrap; font-size: 9px; opacity: .85; }
.hero-art img { display: block; width: 100%; height: auto; }
.annotation { position: absolute; z-index: 2; right: 0; bottom: 0; margin: 0; padding: 11px 16px; border: 1px solid #dbe5d7; border-radius: 30px; background: #fcfdf9; color: #4d7058; box-shadow: 0 4px 16px #173f3506; font-size: 11px; line-height: 1.5; }
.annotation span { display: inline-flex; align-items: center; justify-content: center; width: 18px; height: 18px; margin-right: 5px; border-radius: 50%; background: #e4efde; color: var(--green); }
.platform-strip { display: flex; align-items: center; gap: 32px; padding: 28px 0; border-block: 1px solid var(--line); }
.platform-strip p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.9; flex-shrink: 0; }
.platform-strip strong { font-weight: 600; color: #3e5d4b; font-size: 13px; }
.platform-strip ul { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; justify-content: space-evenly; gap: 24px; flex: 1; }
.platform-strip li { display: flex; align-items: center; gap: 8px; font-size: 13px; color: #45604e; white-space: nowrap; }
.platform-strip img { object-fit: contain; }
.text-link { color: var(--green); font-size: 13px; display: inline-flex; align-items: center; gap: 12px; line-height: 1.8; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.platform-strip > a { font-size: 11px; flex-shrink: 0; }
.section { padding: 88px 0; }
.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; margin-bottom: 32px; }
h2 { font-size: 34px; font-weight: 700; letter-spacing: -.04em; line-height: 1.4; margin: 14px 0 0; }
.section-head p { font-size: 14px; color: var(--muted); line-height: 1.9; max-width: 340px; margin: 0; }
.section-intro .text-link { margin-top: 12px; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature { border: 1px solid var(--line); border-radius: 12px; padding: 28px; background: #fff; }
.feature-icon { width: 62px; height: 54px; display: flex; align-items: center; gap: 5px; font-family: ui-monospace, monospace; font-weight: 600; font-size: 32px; color: var(--green); margin-bottom: 28px; letter-spacing: -2px; }
.edit-mark { font-size: 18px; align-self: flex-start; margin-top: 5px; letter-spacing: 0; }
.code-icon { flex-direction: column; align-items: flex-start; justify-content: center; gap: 0; font-size: 27px; }
.code-dots { font-size: 20px; letter-spacing: 4px; line-height: .7; color: #8daf7e; }
.feature h3, .scenario h3 { font-size: 18px; margin: 0 0 12px; font-weight: 650; }
.feature p { font-size: 14px; color: var(--muted); line-height: 1.9; margin: 0; }
.feature-tag { display: inline-block; color: #547651; background: #eef4e9; border-radius: 4px; font-size: 11px; line-height: 1.6; padding: 4px 8px; margin-top: 24px; }
.product-shot { padding-top: 0; padding-bottom: 0; }
.workspace-frame { margin: 0; padding: 12px 12px 0; background: #e9f0e6; border: 1px solid #dbe5d6; border-radius: 16px; }
.workspace-frame img { display: block; width: 100%; height: auto; border: 1px solid #d1dacc; border-radius: 8px; }
.workspace-frame figcaption { text-align: center; color: #536a55; font-size: 11px; line-height: 1.8; padding: 12px 4px; }
.how { padding: 28px 0 0; margin: 0; list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.how li { display: flex; gap: 14px; align-items: flex-start; }
.number { background: #e8efe4; border: 1px solid #d9e4d2; width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-family: ui-monospace, monospace; font-size: 11px; color: #4d6946; }
.how h3 { font-size: 15px; margin: 5px 0 8px; font-weight: 650; }
.how p { color: var(--muted); font-size: 12px; line-height: 1.8; margin: 0; }
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.scenario { min-width: 0; padding: 24px 0 0; border-top: 1px solid #bdcdbb; }
.scenario-label { font-size: 10px; letter-spacing: .06em; color: var(--muted); }
.scenario h3 { margin: 18px 0 10px; }
.scenario p { font-size: 13px; color: var(--muted); line-height: 1.85; margin: 0; }
.scenario-sample { min-height: 80px; margin-top: 22px; padding: 17px 20px; border-radius: 8px; background: #edf2e8; font-size: 12px; color: #45604a; display: flex; flex-direction: column; gap: 9px; }
.scenario-sample > span:first-child { font-weight: 600; }
.sample-table { display: grid; grid-template-columns: 1fr 2fr; gap: 0; padding: 12px 20px; }
.sample-table span { padding: 5px 0; }
.sample-table span:nth-child(-n+2) { border-bottom: 1px solid #d7e1d0; font-weight: 600; }
.sample-code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; background: #eaf0ec; color: #32765b; }
.download { border-radius: 18px; padding: 44px; background: #173f35; color: #f0f6e9; }
.download-heading { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin-bottom: 30px; }
.download .eyebrow { color: #b9d3a9; }
.download .eyebrow::before { background: #a4c78c; }
.download h2 { font-size: 36px; }
.download-heading p { font-size: 14px; line-height: 1.9; color: #b8cfc0; margin: 18px 0 0; }
.download-free { width: 102px; height: 102px; border: 1px solid #557357; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 7px; font-size: 16px; color: #d3e6bb; flex-shrink: 0; transform: rotate(8deg); margin-right: 10px; }
.download-free span { font-family: ui-monospace, monospace; font-size: 10px; letter-spacing: .07em; color: #b0c8a0; }
.download-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.download-card { min-width: 0; padding: 24px; border: 1px solid #507064; border-radius: 10px; background: #244b40; }
.os-symbol { display: inline-block; font-family: -apple-system, sans-serif; font-size: 29px; color: #c3d9b3; line-height: 1; height: 33px; }
.windows-symbol { font-size: 36px; }
.download-card h3 { margin: 16px 0 10px; font-size: 20px; font-weight: 600; }
.download-card p { margin: 0; color: #b9cfc0; font-size: 12px; line-height: 1.9; }
.download-card .button { margin-top: 22px; width: 100%; background: #deedc9; color: #173f35; font-size: 13px; padding: 12px; gap: 12px; }
.download-card .button:hover { background: #edf7de; }
.download-card .secondary { background: transparent; border-color: #738e73; color: #deedc9; }
.download-card .secondary:hover { background: #315c4c; }
.web-card { background: transparent; }
.download-meta { display: flex; justify-content: space-between; gap: 16px; margin-top: 22px; color: #adc7b7; font-size: 11px; line-height: 1.8; }
.download-meta a { text-decoration: underline; text-underline-offset: 4px; }
.guide-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 40px; }
.guide-links a { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 20px 0; border-bottom: 1px solid var(--line); font-size: 15px; line-height: 1.7; }
.guide-links a:hover { color: var(--green); }
.guide-links a > span:last-child { color: #789273; font-size: 18px; }
.guide-links small { display: block; font-size: 11px; color: var(--muted); margin-top: 5px; }
.faq { display: grid; grid-template-columns: .75fr 1fr; gap: 70px; padding: 0 0 88px; }
.faq > div:first-child .text-link { margin-top: 22px; }
.faq details { border-bottom: 1px solid var(--line); padding: 20px 0; }
.faq details:first-child { padding-top: 0; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 14px; line-height: 1.8; padding-right: 8px; }
.faq details p { font-size: 13px; color: var(--muted); line-height: 1.9; margin: 16px 0 0; }
.faq details a { text-decoration: underline; text-underline-offset: 3px; color: var(--green); }
.footer { padding: 30px 0 36px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 24px; color: var(--muted); font-size: 12px; line-height: 1.8; }
.footer .brand { font-size: 20px; color: #172e27; }
.footer .brand-image { width: 28px; height: 28px; }
.footer p { margin: 9px 0 0; font-size: 11px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; align-content: center; gap: 4px 22px; }
.footer-links > span { width: 100%; text-align: right; font-size: 10px; color: var(--muted); }
.footer a:hover { text-decoration: underline; text-underline-offset: 4px; }
/* Shared typography for the existing static guides. */
.guide { max-width: 940px; }
.guide h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.35; margin: 50px 0 24px; }
.guide h2 { font-size: 24px; margin: 36px 0 12px; }
.guide main p, .guide main li { font-size: 17px; line-height: 1.85; }
.guide main a:not(.button) { text-decoration: underline; text-underline-offset: 4px; }
.guide section { margin: 28px 0; }
.guide .footer a { text-decoration: underline; }
@media (max-width: 1050px) {
  .hero { gap: 26px; padding-top: 56px; }
  h1 { font-size: 46px; }
  .hero .lead { font-size: 14px; }
  .desktop-break { display: none; }
  .hero .actions { gap: 9px; }
  .hero .button { padding: 13px 16px; gap: 10px; font-size: 13px; }
  .source-tools { gap: 5px; }
  .source-tools span { padding: 4px 6px; }
  .platform-strip { gap: 24px; flex-wrap: wrap; }
  .platform-strip ul { gap: 16px; }
  .platform-strip > a { width: 100%; justify-content: flex-end; margin-top: -8px; }
  .feature { padding: 24px; }
  .download-card { padding: 22px; }
}
@media (max-width: 760px) {
  .shell { padding: 0 22px; }
  .nav { min-height: 78px; gap: 16px; }
  .brand { font-size: 22px; gap: 8px; }
  .brand-image { width: 36px; height: 36px; }
  .nav-links { gap: 18px; font-size: 12px; }
  .landing .nav-links > a:first-child, .nav-github { display: none; }
  .nav-links .nav-download { padding: 9px 12px; }
  .hero { grid-template-columns: 1fr; padding: 42px 0 34px; gap: 34px; }
  .hero h1 { font-size: clamp(37px, 7.5vw, 52px); margin: 20px 0; }
  .hero .lead { font-size: 15px; max-width: 480px; }
  .source-tools { margin-top: 18px; }
  .source-tools span { padding: 5px 8px; }
  .hero .actions { margin-top: 24px; gap: 12px; }
  .hero .button { min-height: 48px; padding: 13px 18px; font-size: 13px; }
  .hero-art { max-width: 500px; width: 100%; margin: auto; padding-top: 24px; padding-bottom: 48px; }
  .chat-card { margin-top: 60px; }
  .art-label { font-size: 9px; }
  .card-bar { font-size: 10px; padding: 10px; }
  .annotation { font-size: 11px; padding: 9px 13px; }
  .platform-strip { gap: 20px; padding: 24px 0; }
  .platform-strip p { flex-basis: 100%; font-size: 12px; }
  .platform-strip p br { display: none; }
  .platform-strip strong { margin-left: 7px; }
  .platform-strip ul { flex-basis: 100%; justify-content: space-between; gap: 12px; }
  .platform-strip li { flex-direction: column; gap: 7px; font-size: 11px; }
  .platform-strip > a { justify-content: flex-start; margin-top: 0; }
  .section { padding: 56px 0; }
  .section-head { display: block; margin-bottom: 26px; }
  h2 { font-size: 29px; margin-top: 12px; }
  .section-head p { max-width: 460px; margin-top: 16px; font-size: 13px; }
  .features { grid-template-columns: 1fr; gap: 14px; }
  .feature { padding: 24px; }
  .feature-icon { margin-bottom: 16px; height: 44px; }
  .feature p { font-size: 13px; }
  .feature-tag { margin-top: 18px; }
  .product-shot { padding-top: 0; padding-bottom: 0; }
  .workspace-frame { padding: 6px 6px 0; border-radius: 10px; }
  .workspace-frame img { border-radius: 5px; }
  .workspace-frame figcaption { font-size: 9px; padding: 9px 2px; }
  .how { grid-template-columns: 1fr; gap: 22px; padding-top: 26px; }
  .how h3 { margin-bottom: 5px; }
  .scenario-grid { grid-template-columns: 1fr; gap: 28px; }
  .scenario { padding-top: 20px; }
  .scenario h3 { margin-top: 13px; }
  .scenario-sample { margin-top: 16px; }
  .download { padding: 28px 22px; border-radius: 14px; }
  .download-heading { gap: 12px; margin-bottom: 24px; }
  .download h2 { font-size: 29px; }
  .download-heading .eyebrow { font-size: 10px; }
  .download-heading p { font-size: 12px; }
  .download-free { display: none; }
  .download-options { grid-template-columns: 1fr; gap: 12px; }
  .download-card { padding: 24px; }
  .download-card h3 { margin-top: 12px; }
  .download-card .button { margin-top: 18px; }
  .download-meta { flex-direction: column; gap: 7px; font-size: 10px; margin-top: 20px; }
  .guide-links { grid-template-columns: 1fr; }
  .guide-links a { padding: 18px 0; font-size: 14px; }
  .faq { grid-template-columns: 1fr; gap: 30px; padding-bottom: 56px; }
  .faq > div:first-child .text-link { margin-top: 14px; }
  .footer { flex-direction: column; gap: 22px; }
  .footer-links { justify-content: flex-start; gap: 10px 20px; }
  .footer-links > span { text-align: left; }
  .guide .nav-links { gap: 16px; }
}
@media (max-width: 390px) {
  .shell { padding: 0 18px; }
  .brand { font-size: 20px; }
  .brand-image { width: 32px; height: 32px; }
  .landing .nav-links > a:nth-child(2) { display: none; }
  .hero { padding-top: 34px; }
  .hero h1 { font-size: 35px; }
  .hero .lead { font-size: 14px; }
  .hero .actions { gap: 9px; }
  .hero .button { padding: 12px; font-size: 12px; gap: 8px; }
  .source-tools { gap: 5px; }
  .source-tools span { font-size: 9px; padding: 4px 6px; }
  .trust-list { font-size: 11px; gap: 14px; }
  .card-kind { display: none; }
  .card-bar { font-size: 9px; }
  .annotation { font-size: 10px; }
  .download { padding: 26px 18px; }
  .download h2 { font-size: 26px; }
  .download-card { padding: 22px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
  .button:hover { transform: none; }
}