:root {
  color-scheme: light;
  --ink: #172f29;
  --muted: #455f55;
  --green: #08624e;
  --paper: #f8f8f0;
  --line: #cddbd0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.65; }
a { color: var(--green); text-underline-offset: .2em; }
a:focus-visible, summary:focus-visible { outline: 3px solid #947533; outline-offset: 4px; }
.wrap { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.header { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 9px; color: var(--ink); font-weight: 800; font-size: 1.22rem; text-decoration: none; }
.brand img { border-radius: 8px; }
nav, .footer { display: flex; align-items: center; gap: clamp(12px, 3vw, 32px); }
nav a, .footer a { font-size: .87rem; text-decoration: none; }
nav a:hover, .footer a:hover { text-decoration: underline; }
.hero { display: grid; grid-template-columns: 1.18fr 1fr; align-items: center; gap: clamp(26px, 5vw, 72px); padding-block: 44px 62px; }
.eyebrow { color: var(--green); font-weight: 750; font-size: .88rem; letter-spacing: .08em; margin: 0 0 12px; }
h1, h2, h3 { line-height: 1.28; margin: 0; }
h1 { font-size: clamp(2.25rem, 5.05vw, 4.35rem); letter-spacing: -.045em; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.55rem); letter-spacing: -.03em; }
h3 { font-size: 1.15rem; }
.lede { color: var(--muted); max-width: 29em; font-size: clamp(1rem, 1.6vw, 1.18rem); margin: 22px 0 28px; }
.button { display: inline-flex; align-items: center; gap: 12px; padding: 12px 20px; min-height: 48px; border-radius: 10px; color: white; background: var(--green); font-weight: 700; text-decoration: none; }
.button:hover { background: #094c3d; }
.demo { margin: 0; padding: 28px 12px 16px; text-align: center; border-radius: 25px; background: radial-gradient(ellipse at 52% 35%, #f2f6df, #dcebe0 78%); }
.demo img { display: block; width: min(230px, 81%); height: auto; margin-inline: auto; border: 5px solid #203630; border-radius: 26px; box-shadow: 0 14px 28px #183b2a30; }
figcaption { font-size: .85rem; color: var(--muted); margin-top: 12px; }
.section { padding-block: 38px 55px; border-top: 1px solid var(--line); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; list-style-position: inside; padding: 0; margin: 23px 0 0; }
.steps li { padding: 21px; background: #fffdf7; border: 1px solid var(--line); border-radius: 13px; }
.steps li::marker { color: var(--green); font-weight: 750; }
.steps h3 { display: inline; }
.steps p, .guide p, details p { margin-bottom: 0; color: var(--muted); }
.guide { display: flex; justify-content: space-between; align-items: center; gap: 24px; border-radius: 18px; padding: 28px; margin-bottom: 50px; background: #e5eee2; }
.guide .eyebrow { margin-bottom: 10px; }
.guide-link { flex: none; font-weight: 750; }
.faq h2 { margin-bottom: 16px; }
details { border-bottom: 1px solid var(--line); padding: 12px 0; }
summary { cursor: pointer; font-weight: 650; padding: 4px 0; }
.footer { min-height: 76px; border-top: 1px solid var(--line); }
.footer span { margin-right: auto; font-weight: 750; }
.article { max-width: 700px; padding-block: 48px; }
.article h1 { font-size: clamp(2rem, 6vw, 3.5rem); }
.article h2 { font-size: 1.55rem; margin-top: 32px; }
.article aside { background: #e5eee2; padding: 18px 22px; border-radius: 12px; margin: 24px 0; }
@media (max-width: 700px) {
  .wrap { width: calc(100% - 32px); }
  .header { min-height: 62px; }
  .hero { grid-template-columns: 1fr; padding-block: 34px 42px; }
  .demo { padding-top: 20px; }
  .demo img { width: min(204px, 76%); }
  .steps { grid-template-columns: 1fr; }
  .guide { align-items: flex-start; flex-direction: column; gap: 14px; }
}
.language { font-weight: 750; white-space: nowrap; }
.demo video { display: block; width: min(230px, 81%); height: auto; aspect-ratio: 540 / 1170; margin-inline: auto; border: 5px solid #203630; border-radius: 25px; background: #203630; box-shadow: 0 14px 28px #183b2a30; }
:lang(en) > body h1 { letter-spacing: -.055em; }
@media (max-width: 700px) {
  .demo video { width: min(204px, 85%); }
}
@media (max-width: 380px) {
  .brand img { width: 26px; height: 26px; }
  .brand { font-size: 1rem; gap: 5px; }
  nav { gap: 9px; }
  nav a { font-size: .78rem; }
}