:root {
  color-scheme: light;
  --cream: #faf8f0;
  --green: #173f35;
  --muted: #65736a;
  --line: #dedfd3;
  --paper: #fffef9;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--green);
  background: var(--cream);
  font-synthesis: none;
  -webkit-text-size-adjust: 100%;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible { outline: 3px solid #a26b22; outline-offset: 5px; }
[hidden] { display: none !important; }
.page-width { width: min(1060px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 10; padding: 12px 16px; background: var(--paper); border-radius: 8px; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 30px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 15px 15px 15px 4px; color: var(--cream); background: var(--green); font-size: 27px; font-weight: 600; }
.brand-name { font-size: 21px; font-weight: 650; letter-spacing: 1px; }
.brand-name small { display: block; margin-top: 3px; font-size: 10px; font-weight: 400; letter-spacing: 1.1px; color: var(--muted); }
.header-label { font-size: 11px; color: var(--muted); padding: 7px 11px; border: 1px solid var(--line); border-radius: 30px; white-space: nowrap; }
.hero { display: grid; grid-template-columns: 1.2fr 1fr; gap: 70px; align-items: center; padding-block: 64px 30px; }
.hero-copy { min-width: 0; }
.eyebrow { display: flex; align-items: center; gap: 8px; margin: 0 0 18px; font-size: 11px; letter-spacing: 2px; font-weight: 600; color: var(--muted); }
.eyebrow > span { width: 6px; height: 6px; border-radius: 50%; background: #7b9171; }
h1 { margin: 0; font-size: clamp(40px, 4.8vw, 58px); line-height: 1.28; font-weight: 650; letter-spacing: -1.5px; }
.title-accent { color: #587853; }
.hero-description { margin: 20px 0 26px; color: var(--muted); line-height: 1.8; font-size: 15px; }
.download-panel { max-width: 440px; }
.download-button { display: flex; justify-content: center; align-items: center; gap: 10px; min-height: 60px; padding: 17px 20px; border: 1px solid var(--green); border-radius: 12px; background: var(--green); color: var(--cream); text-decoration: none; font-size: 17px; font-weight: 550; box-shadow: 0 9px 24px #173f3510; transition: background .15s, transform .15s; }
.download-button > span { margin-left: auto; font-size: 20px; line-height: 1; }
.download-button svg { margin-right: auto; flex: 0 0 auto; }
.download-button:hover { background: #245546; }
.download-button:active { transform: translateY(1px); }
.download-meta { display: grid; grid-template-columns: .7fr 1.25fr 1fr; gap: 12px; padding: 19px 4px 0; margin: 0; }
.download-meta div + div { border-left: 1px solid var(--line); padding-left: 17px; }
.download-meta dt { margin-bottom: 5px; font-size: 10px; color: var(--muted); }
.download-meta dd { margin: 0; font-size: 13px; font-weight: 600; white-space: nowrap; }
.package-note { margin: 17px 0 0; font-size: 10px; color: var(--muted); letter-spacing: .3px; }
.wechat-tip { display: flex; gap: 8px; align-items: flex-start; max-width: 440px; margin: 18px 0 0; font-size: 11px; line-height: 1.75; color: var(--muted); }
.wechat-tip > span { display: grid; place-items: center; flex: 0 0 18px; height: 18px; border: 1px solid #b8c4b5; border-radius: 5px; font-size: 13px; line-height: 1; }
.device-notice { display: flex; align-items: flex-start; gap: 10px; max-width: 440px; margin: 0 0 15px; padding: 14px; border: 1px solid #becbb6; border-radius: 10px; background: #eaf0e3; line-height: 1.65; font-size: 12px; }
.device-notice strong { display: block; font-size: 13px; }
.device-notice p { margin: 3px 0 0; }
.notice-icon { flex: 0 0 auto; display: grid; place-items: center; width: 23px; height: 23px; border: 1px solid #93ac8d; border-radius: 50%; font-weight: 600; }
.brand-visual { position: relative; isolation: isolate; align-self: stretch; min-height: 425px; max-height: 520px; overflow: hidden; border-radius: 200px 200px 24px 24px; border: 1px solid #dbe1ce; background: linear-gradient(155deg, #eaf0e2, #e0e7d6 70%, #d8e1ca); }
.visual-heading { position: absolute; inset: 55px 0 auto; display: grid; gap: 7px; text-align: center; font-size: 18px; letter-spacing: 3px; }
.visual-heading span + span { font-size: 8px; letter-spacing: 2.5px; color: var(--muted); }
.visual-orbit { position: absolute; z-index: -1; width: 360px; height: 360px; border: 1px solid #b9c7ae70; border-radius: 50%; }
.orbit-one { top: 105px; left: -56px; }
.orbit-two { top: 60px; left: 105px; }
.visual-leaf { position: absolute; top: 102px; left: 22px; transform: rotate(-10deg); opacity: .6; }
.product-image { position: absolute; width: 62%; height: auto; top: 128px; left: 24%; transform: rotate(-8deg); filter: drop-shadow(0 17px 18px #173f3515); }
.visual-caption { position: absolute; left: 26px; bottom: 26px; }
.tiny-label { font-size: 9px; letter-spacing: 1.1px; color: var(--muted); }
.visual-caption p { margin: 10px 0 0; font-size: 19px; line-height: 1.6; letter-spacing: .5px; }
.visual-tag { position: absolute; right: 21px; bottom: 33px; display: flex; gap: 8px; align-items: center; }
.visual-tag > span { font-family: Georgia, serif; font-size: 41px; line-height: 1; font-weight: 400; }
.visual-tag p { margin: 0; font-size: 9px; line-height: 1.65; }
.section-space { margin-top: 64px; }
.section-heading .eyebrow { margin-bottom: 10px; }
h2 { margin: 0; font-size: 25px; line-height: 1.5; font-weight: 600; letter-spacing: -.4px; }
.section-description { color: var(--muted); font-size: 13px; line-height: 1.75; margin: 9px 0 0; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 25px; }
.feature-card { padding: 24px 22px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); }
.feature-number { font-family: Georgia, serif; font-size: 17px; color: #92a286; }
h3 { font-size: 16px; font-weight: 600; line-height: 1.5; }
.feature-card h3 { margin: 20px 0 9px; }
.feature-card p { margin: 0; font-size: 12px; line-height: 1.9; color: var(--muted); }
.installation { display: grid; grid-template-columns: 1fr 1.4fr; gap: 64px; padding-top: 41px; border-top: 1px solid var(--line); }
.install-steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 24px; }
.install-steps li { display: flex; gap: 16px; }
.step-index { display: grid; place-items: center; flex: 0 0 30px; height: 30px; border: 1px solid #bcc9b8; border-radius: 50%; font-size: 12px; }
.install-steps h3 { margin: 3px 0 6px; font-size: 14px; }
.install-steps p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.9; }
.experience-note { display: flex; gap: 15px; padding: 25px 28px; border-radius: 14px; background: #eef0e6; border: 1px solid #e1e4d7; }
.note-symbol { flex: 0 0 22px; height: 22px; margin-top: 4px; display: grid; place-items: center; border: 1px solid #9cab94; border-radius: 50%; font-family: Georgia, serif; }
.experience-note h2 { font-size: 15px; }
.experience-note p { margin: 8px 0 0; color: var(--muted); font-size: 12px; line-height: 1.9; }
.share-section { display: flex; align-items: center; justify-content: space-between; gap: 28px; padding-block: 46px; }
.share-section h2 { font-size: 17px; }
.share-section p { margin: 7px 0 0; color: var(--muted); font-size: 12px; line-height: 1.8; }
.share-url { display: flex; gap: 32px; align-items: center; flex: 0 0 auto; padding: 13px 17px; border: 1px solid #c6cebe; border-radius: 9px; font-size: 13px; text-decoration: none; }
.share-url:hover { background: #eef0e6; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 23px; border-top: 1px solid var(--line); font-size: 10px; color: var(--muted); }

@media (max-width: 900px) {
  .hero { gap: 32px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .brand-visual { min-height: 435px; }
  .visual-caption { left: 21px; }
  .visual-caption p { font-size: 16px; }
  .visual-tag { right: 17px; }
  .visual-tag > span { font-size: 34px; }
  .visual-tag p { font-size: 8px; }
  .product-image { top: 153px; width: 70%; left: 18%; }
  .installation { gap: 35px; grid-template-columns: 1fr 1.35fr; }
}
@media (max-width: 650px) {
  .page-width { width: calc(100% - 40px); }
  .site-header { padding-block: 21px; }
  .brand-mark { width: 38px; height: 38px; font-size: 24px; border-radius: 12px 12px 12px 3px; }
  .brand { gap: 10px; }
  .brand-name { font-size: 18px; }
  .brand-name small { font-size: 9px; letter-spacing: .6px; }
  .header-label { padding: 6px 9px; font-size: 10px; }
  .hero { display: block; padding-block: 35px 0; }
  .eyebrow { font-size: 10px; margin-bottom: 14px; }
  h1 { font-size: 44px; line-height: 1.3; letter-spacing: -1px; }
  .hero-description { margin-block: 17px 23px; font-size: 14px; }
  .download-panel, .wechat-tip, .device-notice { max-width: none; }
  .download-button { min-height: 58px; padding-inline: 17px; font-size: 16px; }
  .download-meta { gap: 9px; padding-top: 17px; grid-template-columns: .75fr 1.3fr 1fr; }
  .download-meta div + div { padding-left: 12px; }
  .download-meta dd { font-size: 12px; }
  .package-note { font-size: 10px; }
  .wechat-tip { font-size: 10px; margin-top: 16px; }
  .brand-visual { min-height: 320px; max-width: 440px; margin: 32px auto 0; border-radius: 120px 120px 18px 18px; }
  .visual-heading { inset-block-start: 30px; font-size: 16px; }
  .visual-leaf { top: 76px; left: 25px; width: 55px; height: 55px; }
  .product-image { top: 74px; left: 35%; width: 53%; max-width: 230px; }
  .orbit-one { top: 61px; left: -24px; width: 275px; height: 275px; }
  .orbit-two { top: 34px; left: 122px; width: 275px; height: 275px; }
  .visual-caption { bottom: 24px; left: 23px; }
  .visual-caption p { font-size: 17px; margin-top: 8px; }
  .visual-tag { bottom: 26px; right: 24px; }
  .visual-tag > span { font-size: 37px; }
  .visual-tag p { font-size: 9px; }
  .section-space { margin-top: 45px; }
  h2 { font-size: 22px; }
  .feature-grid { gap: 10px; margin-top: 20px; }
  .feature-card { padding: 20px 16px; }
  .feature-card h3 { margin-top: 15px; font-size: 14px; }
  .feature-card p { font-size: 11px; line-height: 1.85; }
  .installation { display: block; padding-top: 30px; }
  .install-steps { margin-top: 24px; gap: 21px; }
  .install-steps li { gap: 13px; }
  .install-steps p { font-size: 12px; }
  .experience-note { gap: 11px; padding: 20px 17px; }
  .experience-note p { font-size: 11px; }
  .share-section { align-items: flex-start; flex-direction: column; gap: 17px; padding-block: 32px; }
  .share-section h2 { font-size: 16px; }
  .share-url { gap: 36px; min-height: 44px; }
  .site-footer { padding-block: 22px; font-size: 9px; }
}
@media (max-width: 350px) {
  .page-width { width: calc(100% - 32px); }
  h1 { font-size: 38px; }
  .header-label { font-size: 9px; padding-inline: 7px; }
  .download-button { font-size: 14px; gap: 7px; padding-inline: 13px; }
  .download-meta { gap: 5px; }
  .download-meta div + div { padding-left: 8px; }
  .download-meta dd { font-size: 11px; }
  .feature-card { padding-inline: 13px; }
  .visual-caption { left: 18px; }
  .visual-tag { right: 16px; }
  .visual-caption p { font-size: 15px; }
  .visual-tag > span { font-size: 32px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .download-button { transition: none; }
}