:root {
  color-scheme: light;
  --canvas: #f3f6f8;
  --paper: #fffefb;
  --ink: #172535;
  --muted: #526171;
  --blue: #2768c7;
  --blue-soft: #e9f1fc;
  --green: #167b68;
  --green-soft: #e5f4ef;
  --line: #dce4ea;
  --gold: #c58325;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--canvas);
}
* { box-sizing: border-box; }
html { scroll-padding-top: 24px; }
body { margin: 0; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 6px; border-radius: 3px; }
a:hover { color: var(--blue); }
p, h1, h2, h3 { margin: 0; }
.wrap { width: min(1120px, calc(100% - 96px)); margin-inline: auto; }
.site-header { display: flex; align-items: center; justify-content: space-between; min-height: 108px; border-bottom: 1px solid var(--line); gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 650; letter-spacing: 1px; white-space: nowrap; }
.brand-symbol { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px 10px 10px 2px; color: white; background: var(--blue); font-size: 20px; }
.brand-logo { width: 36px; height: 36px; border-radius: 9px; object-fit: contain; }
nav { display: flex; gap: 30px; font-size: 14px; }
.hero { min-height: 548px; padding-block: 68px; display: grid; grid-template-columns: 1.3fr 1fr; align-items: center; gap: 48px; }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: 2px; color: var(--muted); margin-bottom: 20px; }
h1 { font-size: clamp(36px, 4.7vw, 60px); font-weight: 600; line-height: 1.35; letter-spacing: -1.5px; }
.company h1 { font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif; font-weight: 600; }
.accent { color: var(--blue); }
.intro { margin-top: 26px; color: var(--muted); font-size: 15px; line-height: 1.95; }
.text-link { display: inline-flex; align-items: center; gap: 28px; margin-top: 28px; color: var(--blue); font-size: 14px; font-weight: 600; border-bottom: 1px solid var(--blue); padding-bottom: 5px; }
.about-section { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; border-top: 1px solid var(--line); padding-block: 44px; align-items: center; }
.about-section .eyebrow { margin-bottom: 8px; }
h2 { font-size: 26px; font-weight: 600; line-height: 1.5; }
.about-section > p { color: var(--muted); max-width: 570px; font-size: 15px; }
.product-strip { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 32px 36px; background: var(--blue-soft); border-radius: 16px; margin-bottom: 48px; }
.product-strip .eyebrow { color: var(--blue); margin-bottom: 5px; }
.product-strip p:last-child { color: var(--muted); font-size: 14px; margin-top: 8px; }
.button { display: inline-flex; gap: 28px; align-items: center; flex-shrink: 0; background: var(--blue); border: 1px solid var(--blue); color: white; border-radius: 8px; padding: 11px 20px; font-size: 14px; }
.button:hover { color: var(--blue); background: white; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 26px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.site-footer a { text-decoration: underline; text-underline-offset: 4px; }
.company-art { max-width: 330px; width: 100%; justify-self: center; }
.window-frame { border: 13px solid var(--paper); border-radius: 120px 120px 6px 6px; height: 300px; box-shadow: 12px 16px 0 var(--line); overflow: hidden; }
.window-sky { background: var(--blue-soft); width: 100%; height: 100%; position: relative; overflow: hidden; }
.sun { position: absolute; border-radius: 50%; width: 58px; height: 58px; top: 37px; right: 48px; background: var(--gold); }
.hill { position: absolute; width: 110%; height: 60%; background: var(--green); border-radius: 60% 70% 0 0; bottom: -20%; left: -25%; transform: rotate(12deg); }
.hill-back { background: var(--blue); bottom: -8%; left: 30%; transform: rotate(-15deg); }
.art-caption { margin-top: 32px; text-align: center; font-family: "Songti SC", "STSong", serif; letter-spacing: 3px; color: var(--muted); font-size: 14px; }
.paper-scene { position: relative; width: 300px; height: 365px; justify-self: center; }
.paper-back { position: absolute; inset: 7px 0 -7px; background: var(--blue-soft); border: 1px solid var(--line); transform: rotate(8deg); border-radius: 4px; }
.paper-sheet { position: absolute; inset: 0; padding: 25px; background: var(--paper); border: 1px solid var(--line); box-shadow: 0 12px 30px #1725350c; transform: rotate(-4deg); }
.paper-heading, .paper-bottom { display: flex; justify-content: space-between; font-size: 9px; color: var(--muted); }
.paper-heading { padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.paper-title { font-family: "Songti SC", "STSong", serif; font-size: 25px; line-height: 1.5; margin-top: 20px; }
.paper-photo { position: relative; overflow: hidden; height: 100px; background: var(--blue-soft); margin-top: 20px; }
.paper-photo .sun { width: 25px; height: 25px; top: 18px; right: 40px; }
.paper-lines { padding-top: 18px; display: grid; gap: 8px; }
.paper-lines span { height: 1px; background: var(--line); }
.paper-lines span:last-child { width: 70%; }
.paper-bottom { margin-top: 24px; }
.paper-label { position: absolute; bottom: 7px; right: -34px; background: var(--blue); color: white; padding: 8px 16px; border-radius: 4px; font-size: 12px; transform: rotate(2deg); }
.features { border-top: 1px solid var(--line); padding-block: 44px; }
.section-heading .eyebrow { margin-bottom: 8px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; margin-top: 30px; }
.feature-grid article { border-left: 1px solid var(--line); padding-left: 24px; }
.feature-grid article:first-child { border-left: 0; padding-left: 0; }
.feature-icon { display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 9px; background: var(--blue-soft); color: var(--blue); font-size: 15px; }
h3 { font-size: 18px; font-weight: 600; margin-top: 12px; }
.feature-grid p { font-size: 14px; color: var(--muted); margin-top: 8px; }
.closing-note { display: flex; align-items: center; justify-content: space-between; gap: 20px; background: var(--green-soft); color: var(--green); padding: 22px 28px; border-radius: 12px; margin: 0 0 42px; }
.closing-note p { font-size: 17px; font-weight: 500; }
.closing-note span { font-size: 12px; }
.skip-link { position: absolute; top: -80px; left: 20px; padding: 8px 16px; background: white; z-index: 2; }
.skip-link:focus { top: 16px; }
@media (max-width: 800px) {
  .wrap { width: calc(100% - 48px); }
  .hero { grid-template-columns: 1fr 0.8fr; gap: 24px; padding-block: 48px; min-height: 490px; }
  .paper-scene { width: 245px; height: 328px; }
  .paper-sheet { padding: 20px; }
  .paper-title { font-size: 22px; }
  .paper-label { right: -5px; }
  .paper-photo { height: 80px; }
  .window-frame { height: 250px; }
  .about-section { gap: 30px; }
  .desktop-break { display: none; }
}
@media (max-width: 600px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { min-height: 86px; gap: 12px; }
  .brand { font-size: 17px; gap: 8px; letter-spacing: 0; }
  .brand-symbol { width: 30px; height: 30px; font-size: 17px; }
  .brand-logo { width: 30px; height: 30px; }
  nav { gap: 14px; font-size: 12px; }
  .hero { grid-template-columns: 1fr; gap: 40px; padding-block: 42px; }
  h1 { font-size: 39px; letter-spacing: -1px; }
  .intro { font-size: 14px; margin-top: 20px; }
  .eyebrow { margin-bottom: 16px; font-size: 12px; }
  .company-art { max-width: 240px; }
  .window-frame { height: 240px; }
  .paper-scene { width: 260px; height: 335px; margin-block: 8px 10px; }
  .paper-photo { height: 94px; }
  .about-section { grid-template-columns: 1fr; gap: 16px; padding-block: 30px; }
  h2 { font-size: 23px; }
  .product-strip { display: block; padding: 24px; margin-bottom: 30px; }
  .button { margin-top: 22px; }
  .features { padding-block: 30px; }
  .feature-grid { grid-template-columns: 1fr; gap: 25px; margin-top: 25px; }
  .feature-grid article, .feature-grid article:first-child { border: 0; padding: 0; }
  .feature-icon { float: left; margin-right: 13px; }
  h3 { margin: 0; padding-top: 3px; }
  .feature-grid p { margin-top: 12px; }
  .closing-note { display: block; padding: 20px; margin-bottom: 30px; }
  .closing-note span { display: block; margin-top: 5px; }
  .site-footer { flex-direction: column; align-items: flex-start; gap: 7px; padding-block: 22px; }
}
@media (max-width: 360px) {
  .wrap { width: calc(100% - 32px); }
  nav { gap: 10px; font-size: 11px; }
  .brand { font-size: 15px; }
  h1 { font-size: 34px; }
}