:root {
  color-scheme: light;
  --ink: #202524;
  --muted: #66706b;
  --line: #dce2dc;
  --paper: #f9faf7;
  --mint: #d8f6ef;
  --pink: #ffe8e1;
  --yellow: #ffdf70;
  --shell: 1200px;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid #147f75; outline-offset: 4px; }
img { display: block; max-width: 100%; }
.shell { width: min(calc(100% - 88px), var(--shell)); margin-inline: auto; }
.skip { position: absolute; left: -100vw; top: 12px; z-index: 30; background: #fff; padding: 12px; }
.skip:focus { left: 12px; }
.announcement { background: #dcf4e9; border-bottom: 1px solid #beded0; }
.announcement-inner { min-height: 49px; display: flex; align-items: center; gap: 18px; padding-block: 9px; }
.announcement-tag { flex: none; border: 1px solid #2b8a77; color: #197967; padding: 4px 7px; font-size: 10px; font-weight: 700; letter-spacing: .06em; }
.announcement p { flex: 1; margin: 0; font-size: 12px; line-height: 1.6; font-weight: 600; color: #27584c; }
.announcement a { flex: none; font-size: 11px; font-weight: 700; border-bottom: 1px solid #3b907d; padding-bottom: 3px; color: #216f5f; }
.announcement a:hover { color: #124b40; }
.site-header { position: relative; z-index: 2; border-bottom: 1px solid #d4ded8; background: #f9faf7ed; }
.header-inner { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; white-space: nowrap; }
.brand img { border-radius: 50%; }
.brand small { margin-left: 2px; font-size: 10px; font-weight: 650; letter-spacing: .1em; color: #6b7770; }
.site-header nav { display: flex; gap: 36px; font-size: 13px; font-weight: 600; }
.site-header nav a:hover, .footer-links a:hover { color: #078c7c; }
.hero { background: radial-gradient(circle at 70% 30%, #dcfaf2 0, #edf9f3 31%, #fbfbf7 70%); overflow: hidden; }
.hero-layout { min-height: 660px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 30px; }
.hero-copy { padding: 60px 0 40px; position: relative; z-index: 1; }
.eyebrow, .section-tag, .hero-bottom, .paper-kicker, .visual-label, .visual-index, .version-type, .coming, .platform-number { font-size: 11px; font-weight: 700; letter-spacing: .11em; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: #287d73; }
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: #46b6a5; }
.hero h1 { font-size: clamp(58px, 6.6vw, 96px); line-height: 1.16; letter-spacing: -.075em; font-weight: 670; margin: 34px 0 26px; }
.rotating-title { position: relative; min-height: 2.35em; }
.title-frame { position: absolute; left: 0; top: 0; display: block; width: 100%; }
.title-first { animation: title-first 10s ease-in-out infinite; }
.title-frame em { color: #128b80; font-style: normal; }
.title-second { animation: title-second 10s ease-in-out infinite; }
@keyframes title-first { 0%, 43% { opacity: 1; transform: translateY(0); } 50%, 93% { opacity: 0; transform: translateY(-10px); } 100% { opacity: 1; transform: translateY(0); } }
@keyframes title-second { 0%, 43% { opacity: 0; transform: translateY(10px); } 50%, 93% { opacity: 1; transform: translateY(0); } 100% { opacity: 0; transform: translateY(-10px); } }
.hero-lead { max-width: 485px; font-size: 18px; line-height: 1.9; color: #4f5c56; margin: 0; }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 39px; }
.button { min-height: 53px; min-width: 178px; padding: 0 20px; display: inline-flex; justify-content: space-between; align-items: center; gap: 25px; font-size: 13px; font-weight: 700; }
.button-dark { color: #fff; background: #202725; }
.button-dark:hover { background: #13796e; }
.quiet-link { border-bottom: 1px solid #58655f; padding-bottom: 6px; font-size: 13px; font-weight: 650; }
.quiet-link span { margin-left: 12px; }
.quiet-link:hover { color: #118f7e; border-color: #118f7e; }
.hero-caption { font-size: 12px; color: #7e8981; margin-top: 25px; }
.hero-visual { height: 575px; position: relative; }
.visual-paper { position: absolute; border-radius: 22.5% / 18%; corner-shape: superellipse(2); overflow: hidden; box-shadow: 0 24px 55px #294f4420; }
.paper-back { width: 72%; height: 63%; top: 12%; right: 2%; background: #ffebe5; transform: rotate(8deg); border: 1px solid #f4cfc9; padding: 24px; display: flex; flex-direction: column; justify-content: space-between; }
.paper-kicker { color: #bb7064; font-size: 9px; }
.paper-line { width: 100%; height: 1px; background: #dba99f; }
.paper-front { width: 65%; height: 72%; top: 14%; left: 8%; background: #fffefa; border: 1px solid #e1e6dd; transform: rotate(-6deg); display: flex; flex-direction: column; align-items: center; justify-content: space-between; padding: 25px; }
.paper-front img { width: min(80%, 290px); height: auto; aspect-ratio: 1; }
.visual-label, .visual-index { align-self: stretch; color: #75847a; font-size: 9px; }
.visual-index { text-align: right; }
.paper-lite { right: 1%; bottom: 8%; width: 35%; min-height: 180px; transform: rotate(7deg); border: 1px solid #cde7e0; background: #e7fbf5; padding: 15px; display: flex; align-items: center; flex-direction: column; justify-content: center; gap: 8px; font-size: 12px; font-weight: 700; }
.paper-lite img { width: 115px; height: 115px; }
.hero-bottom { border-top: 1px solid #cbded5; padding: 17px 0 25px; display: flex; justify-content: space-between; gap: 15px; color: #759087; }
.section { padding: 105px 0; }
.section-top { display: flex; justify-content: space-between; gap: 30px; padding-bottom: 19px; border-bottom: 1px solid var(--line); color: #79857d; font-size: 12px; }
.section-tag { color: #16877a; }
.features-head { display: grid; grid-template-columns: 1fr .72fr; align-items: end; gap: 40px; margin: 67px 0 63px; }
.features h2, .versions h2, .download h2 { font-size: clamp(46px, 5vw, 72px); line-height: 1.24; font-weight: 650; letter-spacing: -.065em; margin: 0; }
.features h2 span { color: #2ea697; }
.features-head p { color: #596760; line-height: 2; font-size: 16px; margin: 0; max-width: 380px; }
.feature-row { display: grid; grid-template-columns: 100px 270px 1fr 25px; gap: 20px; align-items: center; min-height: 132px; border-top: 1px solid var(--line); }
.feature-row:last-child { border-bottom: 1px solid var(--line); }
.feature-num { color: #8d9a90; font-size: 12px; }
.feature-row h3 { font-size: 25px; font-weight: 650; letter-spacing: -.035em; margin: 0; }
.feature-row p { font-size: 14px; line-height: 1.8; color: #657169; margin: 0; }
.feature-glyph { color: #55978a; font-size: 20px; }
.fine-print { font-size: 12px; line-height: 1.9; color: #89948a; max-width: 890px; margin: 27px 0 0; }
.versions { background: linear-gradient(118deg, #e7f9f3 0%, #f4fbf7 46%, #fff0eb 100%); padding: 110px 0; }
.versions-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 65px; align-items: center; }
.versions h2 { font-size: clamp(43px, 4.3vw, 62px); margin: 25px 0; }
.versions-copy p { font-size: 15px; line-height: 2; color: #5f6c65; max-width: 385px; margin: 0; }
.version-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.version-card { min-height: 322px; background: #ffffffda; border: 1px solid #dceae2; padding: 26px; display: flex; flex-direction: column; align-items: flex-start; position: relative; transition: transform .2s, border-color .2s; }
.version-card:hover { transform: translateY(-4px); border-color: #6dbdad; }
.version-card img { width: 96px; height: 96px; margin-bottom: auto; }
.version-type { color: #278d80; margin-top: 32px; }
.version-card strong { font-size: 26px; letter-spacing: -.035em; margin-top: 9px; }
.version-card small { font-size: 12px; color: #7d897f; margin-top: 8px; }
.version-arrow { position: absolute; right: 23px; bottom: 27px; color: #3b8c7f; font-size: 21px; }
.offer { background: #fffdf4; border-block: 1px solid #ebe8d6; scroll-margin-top: 20px; }
.offer-inner { display: grid; grid-template-columns: .68fr 1.32fr; gap: 60px; padding-block: 50px; }
.offer h2 { margin: 10px 0 0; font-size: 28px; letter-spacing: -.04em; }
.offer-copy p { margin: 0 0 12px; font-size: 13px; line-height: 1.85; color: #59645c; }
.offer-copy p:last-child { margin-bottom: 0; }
.download-head { display: flex; align-items: end; justify-content: space-between; gap: 35px; margin: 60px 0 47px; }
.download-head p { max-width: 310px; margin: 0; font-size: 15px; line-height: 1.9; color: #6a766f; }
.platform-list { border-top: 1px solid var(--line); }
.platform-row { min-height: 124px; display: grid; grid-template-columns: 105px 1fr auto; align-items: center; gap: 20px; border-bottom: 1px solid var(--line); }
.platform-row strong { display: block; font-size: 24px; font-weight: 650; letter-spacing: -.03em; }
.platform-row small { display: block; font-size: 12px; color: #7c8880; margin-top: 8px; }
.platform-links { display: flex; gap: 10px; }
.platform-links a { min-width: 105px; padding: 12px 15px; border: 1px solid #a9d5c8; background: #e3f7f0; text-align: center; font-size: 12px; font-weight: 700; }
.platform-links a:hover { background: #c8eee3; }
.coming { border: 1px solid #d9e2db; color: #8c9890; padding: 10px 12px; white-space: nowrap; font-size: 10px; }
.download-note { margin: 22px 0 0; color: #8a978c; font-size: 12px; line-height: 1.8; }
.site-footer { background: #e7f4ee; border-top: 1px solid #d2e4da; }
.footer-inner { min-height: 118px; display: flex; align-items: center; justify-content: space-between; gap: 25px; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 700; }
.footer-brand span { display: flex; flex-direction: column; }
.footer-brand small { color: #72857a; font-size: 9px; letter-spacing: .1em; margin-top: 3px; }
.footer-links { display: flex; gap: 28px; font-size: 12px; font-weight: 600; }
.footer-inner > small { color: #8a9b90; font-size: 11px; }
.not-found { min-height: 100vh; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.not-found h1 { font-size: clamp(50px, 8vw, 100px); letter-spacing: -.07em; margin: 20px 0; }
.not-found > p:not(.eyebrow) { color: var(--muted); margin: 0 0 32px; }
@media (max-width: 960px) {
  .shell { width: calc(100% - 52px); }
  .hero-layout { min-height: 585px; }
  .hero h1 { font-size: clamp(53px, 7vw, 75px); }
  .hero-visual { height: 500px; }
  .feature-row { grid-template-columns: 60px 200px 1fr 20px; }
  .versions-grid { gap: 30px; }
}
@media (max-width: 680px) {
  .shell { width: calc(100% - 36px); }
  .header-inner { min-height: 66px; }
  .brand { font-size: 15px; }
  .brand img { width: 31px; height: 31px; }
  .brand small { display: none; }
  .site-header nav { gap: 17px; font-size: 12px; }
  .announcement-inner { display: grid; grid-template-columns: auto 1fr; gap: 6px 10px; align-items: start; padding-block: 10px; }
  .announcement p { font-size: 11px; }
  .announcement a { grid-column: 2; justify-self: start; font-size: 10px; }
  .hero-layout { grid-template-columns: 1fr; gap: 0; min-height: 0; }
  .hero-copy { padding: 62px 0 0; }
  .hero h1 { font-size: clamp(55px, 12.7vw, 78px); margin: 27px 0 20px; }
  .hero-lead { font-size: 16px; }
  .hero-actions { margin-top: 28px; }
  .hero-caption { font-size: 11px; line-height: 1.7; }
  .hero-visual { height: 410px; margin: 0 0 15px; }
  .paper-front { height: 76%; top: 9%; left: 10%; }
  .paper-back { top: 8%; }
  .paper-lite { bottom: 5%; min-height: 134px; }
  .paper-lite img { width: 78px; height: 78px; }
  .hero-bottom { font-size: 9px; }
  .section { padding: 78px 0; }
  .features-head { grid-template-columns: 1fr; gap: 20px; margin: 43px 0 40px; }
  .features h2, .download h2 { font-size: 47px; }
  .features-head p { font-size: 15px; }
  .feature-row { grid-template-columns: 35px 1fr 16px; min-height: 0; padding: 22px 0; gap: 12px; }
  .feature-row h3 { font-size: 22px; }
  .feature-row p { grid-column: 2 / 3; grid-row: 2; font-size: 13px; }
  .feature-glyph { grid-column: 3; grid-row: 1; }
  .versions { padding: 76px 0; }
  .versions-grid { grid-template-columns: 1fr; gap: 35px; }
  .versions h2 { font-size: 43px; }
  .version-card { min-height: 250px; padding: 16px; }
  .version-card img { width: 75px; height: 75px; }
  .version-card strong { font-size: 20px; }
  .version-card small { font-size: 11px; max-width: 110px; line-height: 1.4; }
  .version-arrow { right: 14px; bottom: 18px; }
  .offer-inner { grid-template-columns: 1fr; gap: 17px; padding-block: 42px; }
  .offer h2 { font-size: 25px; }
  .download-head { flex-direction: column; align-items: start; gap: 14px; margin: 45px 0 32px; }
  .download-head p { font-size: 14px; }
  .platform-row { grid-template-columns: 26px 1fr; gap: 10px 13px; padding: 24px 0; }
  .platform-row strong { font-size: 21px; }
  .platform-links, .coming { grid-column: 2; }
  .platform-links { justify-content: flex-start; }
  .coming { justify-self: start; }
  .footer-inner { min-height: 0; padding: 26px 0; display: grid; grid-template-columns: 1fr auto; }
  .footer-inner > small { grid-column: 1 / -1; }
  .footer-links { gap: 14px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .version-card { transition: none; } .title-frame { animation: none; } .title-first { opacity: 1; transform: none; } .title-second { opacity: 0; } }