:root {
  color-scheme: light;
  --paper: #f6f5f0;
  --surface: #fffefb;
  --ink: #253e32;
  --muted: #617066;
  --accent: #315f4b;
  --accent-hover: #244c3b;
  --line: #dce1d7;
  --soft: #e8ede3;
  --gold: #817047;
  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif CJK SC", serif;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 110px; }
body { margin: 0; font-size: 16px; line-height: 1.8; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
button, summary { cursor: pointer; }
button, a, summary { transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease; }
button:focus-visible, a:focus-visible, summary:focus-visible, [tabindex="0"]:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 8px; }
img { display: block; max-width: 100%; height: auto; }
figure, p, h1, h2, h3 { margin: 0; }
[hidden] { display: none !important; }
.svg-defs { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon, .feature-icon { width: 22px; height: 22px; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.container { width: min(1160px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: -80px; left: 20px; background: var(--accent); color: white; padding: 12px 20px; }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 20; background: var(--paper); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 88px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; flex-shrink: 0; }
.brand img { border-radius: 11px; }
.brand > span { font-size: 23px; font-weight: 700; line-height: 1.3; letter-spacing: 2px; }
.brand-en { display: block; margin-top: 3px; font-size: 9px; letter-spacing: 3px; font-weight: 500; }
.navigation { display: flex; align-items: center; gap: 36px; }
.navigation a { min-height: 44px; display: inline-flex; align-items: center; font-size: 14px; color: var(--muted); }
.navigation a:hover { color: var(--accent); }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 12px; padding: 15px 24px; min-height: 56px; border: 1px solid transparent; border-radius: 12px; color: var(--surface); background: var(--accent); font-weight: 600; font-size: 15px; }
.button:hover { background: var(--accent-hover); }
.button:active { transform: translateY(1px); }
.button-small { padding: 9px 18px; min-height: 44px; font-size: 14px; border-radius: 10px; }
.text-link { min-height: 44px; display: inline-flex; gap: 10px; align-items: center; font-size: 14px; font-weight: 500; }
.text-link:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 6px; }
.hero { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; align-items: center; padding-top: 50px; padding-bottom: 46px; }
.hero-copy { padding-bottom: 24px; }
.eyebrow { font-size: 13px; color: var(--accent); font-weight: 500; letter-spacing: 2px; margin-bottom: 25px; }
.hero-copy .eyebrow { display: flex; align-items: center; gap: 10px; }
.tiny-dot { width: 7px; height: 7px; background: var(--accent); border-radius: 50%; }
h1 { font-family: var(--serif); font-size: clamp(40px, 4.45vw, 64px); font-weight: 700; line-height: 1.5; letter-spacing: -2px; }
h1 span { color: var(--accent); }
.hero-description { color: var(--muted); margin-top: 26px; line-height: 2; font-size: 16px; }
.hero-actions { display: flex; align-items: center; gap: 25px; flex-wrap: wrap; margin-top: 33px; }
.hero-meta { display: flex; gap: 12px; flex-wrap: wrap; color: var(--muted); font-size: 12px; margin-top: 20px; }
.hero-figure { min-width: 0; }
.hero-art { height: 620px; position: relative; isolation: isolate; }
.orbit { position: absolute; z-index: -1; border-radius: 50%; border: 1px solid #d7dfd0; }
.orbit-one { width: 490px; height: 490px; max-width: 100%; right: -5px; top: 65px; background: #e9ede3; }
.orbit-two { width: 540px; height: 540px; max-width: 110%; right: -30px; top: 40px; }
.phone { background: var(--paper); border: 6px solid var(--surface); outline: 1px solid #d4dacf; border-radius: 27px; overflow: hidden; box-shadow: 0 18px 45px -20px #253e3240; }
.phone img { width: 100%; }
.phone-back { position: absolute; left: 15px; top: 85px; width: 232px; transform: rotate(-9deg); }
.phone-front { position: absolute; top: 18px; right: 29px; width: 270px; transform: rotate(5deg); }
.art-note { position: absolute; top: 3px; left: 13px; color: var(--gold); font-family: var(--serif); font-size: 17px; letter-spacing: 2px; transform: rotate(-8deg); }
.art-stamp { position: absolute; bottom: 0; left: 30px; display: flex; gap: 15px; align-items: center; border: 1px solid var(--line); background: var(--surface); border-radius: 14px; padding: 16px 24px; transform: rotate(-4deg); box-shadow: 0 8px 20px -12px #253e322e; }
.art-stamp .icon { width: 32px; height: 32px; }
.art-stamp span { font-size: 11px; line-height: 1.9; color: var(--muted); letter-spacing: 1px; }
.art-stamp strong { font-family: var(--serif); font-size: 17px; color: var(--ink); font-weight: 500; }
.hero-figure figcaption { font-size: 11px; color: var(--muted); text-align: center; margin-top: 18px; letter-spacing: 1px; }
.little-promises { border-block: 1px solid var(--line); display: grid; grid-template-columns: repeat(3, 1fr); padding-block: 25px; gap: 24px; }
.little-promises span { display: flex; align-items: center; justify-content: center; gap: 12px; font-size: 13px; color: var(--muted); }
.little-promises span + span { border-left: 1px solid var(--line); }
.section { padding-block: 100px; }
h2 { font-family: var(--serif); font-size: clamp(29px, 3vw, 38px); line-height: 1.6; font-weight: 600; letter-spacing: -.6px; }
h3 { font-size: 20px; font-weight: 600; line-height: 1.6; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; }
.section-heading .eyebrow, .showcase-copy .eyebrow, .local-section .eyebrow, .faq-section .eyebrow { margin-bottom: 14px; }
.section-heading > p { color: var(--muted); font-size: 14px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin-top: 48px; }
.feature { border-top: 1px solid var(--line); padding-top: 26px; }
.feature-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.feature-top span { color: var(--muted); font-size: 11px; letter-spacing: 2px; }
.feature-icon { width: 32px; height: 32px; color: var(--accent); stroke-width: 1.35; }
.feature > p { color: var(--muted); margin-top: 15px; font-size: 14px; line-height: 2; }
.feature-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 23px; }
.feature-tags span { color: var(--muted); background: var(--soft); border-radius: 6px; font-size: 11px; padding: 4px 9px; }
.preview-section { padding-top: 0; padding-bottom: 0; }
.showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 65px; padding: 65px 70px; border: 1px solid var(--line); border-radius: 28px; background: #edf0e7; }
.showcase-copy { align-self: center; min-width: 0; }
.showcase-intro { color: var(--muted); font-size: 14px; margin-top: 20px; }
.preview-tabs { margin-top: 27px; display: grid; gap: 8px; }
.preview-tabs button { display: flex; gap: 15px; align-items: center; width: 100%; min-height: 80px; padding: 15px 18px; text-align: left; border: 1px solid transparent; border-radius: 13px; color: var(--muted); background: transparent; }
.preview-tabs button:hover { background: #e1e8dc; }
.preview-tabs button[aria-selected="true"] { border-color: var(--line); background: var(--surface); color: var(--accent); }
.preview-tabs button span { flex: 1; }
.preview-tabs strong { display: block; font-size: 15px; font-weight: 600; }
.preview-tabs small { display: block; font-size: 12px; font-weight: 400; color: var(--muted); margin-top: 2px; }
.tab-arrow { opacity: 0; }
[aria-selected="true"] .tab-arrow { opacity: 1; }
.showcase-screen { display: grid; place-items: center; min-width: 0; }
.preview-panel { width: 100%; }
.preview-phone { width: 278px; margin-inline: auto; }
.preview-panel figcaption { color: var(--muted); font-size: 11px; margin-top: 20px; text-align: center; letter-spacing: 1px; }
.local-section { display: grid; grid-template-columns: 1.1fr 1fr; gap: 100px; align-items: center; padding-block: 110px; }
.local-intro { font-size: 14px; color: var(--muted); margin-top: 24px; }
.local-points { display: grid; gap: 28px; }
.local-points article { display: flex; align-items: flex-start; gap: 20px; }
.point-number { font-family: Georgia, serif; font-size: 16px; color: var(--gold); line-height: 1.8; }
.local-points h3 { font-size: 17px; }
.local-points p { font-size: 14px; margin-top: 7px; color: var(--muted); }
.download-card { background: var(--accent); border-radius: 24px; color: var(--surface); padding: 55px 65px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 30px; }
.download-card .eyebrow { color: #d9e6d8; margin-bottom: 18px; }
.download-copy > p:not(.eyebrow) { font-size: 14px; color: #d9e6d8; margin-top: 16px; }
.download-facts { display: flex; gap: 10px 20px; flex-wrap: wrap; margin-top: 26px; color: #d9e6d8; font-size: 12px; }
.download-action { display: flex; flex-direction: column; align-items: center; }
.download-icon { border-radius: 18px; margin-bottom: 20px; }
.button-light { background: var(--surface); color: var(--accent); }
.button-light:hover { background: #e2ebda; }
.button-light:focus-visible { outline-color: var(--surface); }
.download-action > p { color: #d9e6d8; font-size: 11px; margin-top: 12px; }
.download-footnote { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; margin-top: 16px; font-size: 12px; color: var(--muted); }
.download-footnote > p { padding-top: 10px; }
summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; list-style: none; min-height: 64px; font-weight: 500; }
summary::-webkit-details-marker { display: none; }
summary .icon { width: 18px; height: 18px; transition: transform 160ms ease; }
details[open] > summary .icon { transform: rotate(45deg); }
.install-details summary { min-height: 44px; justify-content: flex-end; }
.install-details > div { padding: 16px 20px 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.install-details ol { padding-left: 20px; margin-top: 0; }
.install-details li { margin-bottom: 8px; }
.checksum-label { margin-top: 16px; font-size: 11px; letter-spacing: 1px; }
.checksum { display: block; overflow-wrap: anywhere; font-size: 11px; line-height: 1.8; color: var(--ink); margin-block: 5px; }
.install-details .text-link { font-size: 12px; text-decoration: underline; text-underline-offset: 3px; }
.faq-section { display: grid; grid-template-columns: 1fr 1.5fr; gap: 100px; }
.faq-section > div > p:not(.eyebrow) { margin-top: 18px; color: var(--muted); font-size: 14px; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child { border-top: 1px solid var(--line); }
.faq-list summary { padding-block: 20px; font-size: 15px; }
.faq-list details > p { color: var(--muted); font-size: 14px; padding-bottom: 22px; }
.site-footer { border-top: 1px solid var(--line); min-height: 110px; display: flex; justify-content: space-between; align-items: center; gap: 25px; }
.footer-brand > span { font-size: 19px; }
.site-footer > p { font-size: 12px; color: var(--muted); }
.site-footer .text-link { font-size: 12px; }
.arrow-up { transform: rotate(-90deg); }
noscript a { text-decoration: underline; }
@media (min-width: 1500px) { .hero { padding-block: 65px; } }
@media (max-width: 1100px) {
  .container { width: calc(100% - 64px); }
  .hero { grid-template-columns: 1fr 1fr; gap: 20px; }
  h1 { font-size: 46px; }
  .hero-actions { gap: 15px; }
  .hero-art { height: 545px; }
  .phone-front { width: 235px; right: 6px; }
  .phone-back { width: 205px; left: 4px; }
  .orbit-one { width: 380px; height: 380px; top: 82px; }
  .orbit-two { width: 420px; height: 420px; top: 62px; right: -15px; }
  .art-note { font-size: 14px; left: 0; }
  .art-stamp { left: 0; padding: 12px 18px; }
  .showcase { padding: 45px; gap: 40px; }
  .feature-grid { gap: 28px; }
  .local-section { gap: 50px; }
  .download-card { padding: 45px; }
  .download-card h2 { font-size: 30px; }
  .faq-section { gap: 50px; }
}
@media (max-width: 800px) {
  .container { width: calc(100% - 48px); }
  .navigation { gap: 20px; }
  .hero { grid-template-columns: 1fr; text-align: center; padding-top: 55px; gap: 25px; }
  .hero-copy { padding: 0; }
  .hero-copy .eyebrow, .hero-actions, .hero-meta { justify-content: center; }
  h1 { font-size: 52px; }
  .hero-description { margin-top: 20px; }
  .hero-art { width: 480px; max-width: 100%; margin-inline: auto; height: 580px; }
  .phone-front { width: 255px; right: 25px; }
  .phone-back { width: 222px; left: 25px; }
  .orbit-one { width: 440px; height: 440px; }
  .orbit-two { width: 470px; height: 470px; top: 67px; right: -5px; }
  .art-note { left: 20px; }
  .art-stamp { left: 18px; text-align: left; }
  .little-promises { gap: 10px; padding-block: 22px; }
  .little-promises span { flex-direction: column; text-align: center; gap: 9px; font-size: 11px; }
  .section { padding-block: 72px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 18px; }
  .feature-grid { gap: 22px; }
  .feature h3 { font-size: 17px; }
  .feature > p { font-size: 13px; }
  .preview-section { padding-block: 0; }
  .showcase { padding: 34px 26px; gap: 26px; }
  .showcase h2 { font-size: 29px; }
  .showcase-intro br { display: none; }
  .preview-phone { width: 248px; max-width: 100%; }
  .preview-tabs button { padding: 12px 10px; gap: 10px; }
  .tab-arrow { display: none; }
  .local-section { grid-template-columns: 1fr; gap: 36px; }
  .local-points { grid-template-columns: 1fr; }
  .download-card { grid-template-columns: 1fr; text-align: center; padding: 40px 24px; gap: 30px; }
  .download-facts { justify-content: center; }
  .download-icon { display: none; }
  .faq-section { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 560px) {
  html { scroll-padding-top: 132px; }
  .container { width: calc(100% - 40px); }
  .header-inner { min-height: 106px; padding-top: 10px; padding-bottom: 6px; gap: 0 18px; flex-wrap: wrap; }
  .brand { gap: 9px; }
  .brand img { width: 36px; }
  .brand > span { font-size: 20px; }
  .brand-en { font-size: 8px; }
  .navigation { order: 3; justify-content: space-between; gap: 18px; width: 100%; margin-top: 2px; }
  .navigation a { font-size: 14px; }
  .button-small { font-size: 12px; padding: 8px 14px; }
  .hero { padding-top: 38px; padding-bottom: 30px; gap: 28px; }
  .eyebrow { font-size: 11px; letter-spacing: 1.5px; margin-bottom: 18px; }
  h1 { font-size: clamp(34px, 8.9vw, 46px); letter-spacing: -1px; line-height: 1.5; }
  .hero-description { font-size: 16px; line-height: 1.9; margin-top: 18px; }
  .hero-actions { gap: 14px; margin-top: 26px; }
  .hero-actions .button { min-height: 52px; font-size: 13px; padding: 12px 17px; gap: 9px; }
  .hero-actions .text-link { font-size: 13px; gap: 5px; }
  .hero-meta { font-size: 12px; gap: 8px; margin-top: 14px; }
  .hero-art { width: 350px; height: 460px; }
  .phone-front { width: 200px; right: 13px; top: 15px; border-width: 5px; border-radius: 22px; }
  .phone-back { width: 172px; left: 16px; top: 70px; border-width: 5px; border-radius: 20px; }
  .orbit-one { width: 315px; height: 315px; right: 1px; top: 75px; }
  .orbit-two { width: 340px; height: 340px; right: -6px; top: 62px; }
  .art-note { font-size: 12px; left: 0; top: 0; letter-spacing: 1px; }
  .art-stamp { left: 4px; padding: 10px 14px; gap: 9px; border-radius: 10px; }
  .art-stamp .icon { width: 25px; height: 25px; }
  .art-stamp strong { font-size: 14px; }
  .hero-figure figcaption { font-size: 10px; margin-top: 14px; }
  .little-promises { gap: 6px; }
  .little-promises span { font-size: 10px; padding-inline: 6px; }
  .section { padding-block: 58px; }
  h2 { font-size: 28px; }
  .section-heading > p { font-size: 16px; }
  .feature-grid { grid-template-columns: 1fr; gap: 28px; margin-top: 28px; }
  .feature { padding-top: 22px; }
  .feature-top { margin-bottom: 15px; }
  .feature h3 { font-size: 20px; }
  .feature > p { font-size: 16px; margin-top: 10px; }
  .feature-tags { margin-top: 15px; }
  .preview-section { padding-block: 0; }
  .showcase { grid-template-columns: 1fr; padding: 32px 21px; gap: 30px; border-radius: 20px; }
  .showcase h2 { font-size: 29px; }
  .showcase-intro { margin-top: 15px; font-size: 16px; }
  .preview-tabs { grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 22px; }
  .preview-tabs button { min-height: 64px; padding: 10px; gap: 8px; }
  .preview-tabs button > .icon { width: 18px; height: 18px; }
  .preview-tabs strong { font-size: 12px; }
  .preview-tabs small { display: none; }
  .preview-phone { width: 250px; }
  .preview-panel figcaption { letter-spacing: 0; font-size: 10px; }
  .local-intro { margin-top: 18px; font-size: 16px; }
  .desktop-break { display: none; }
  .local-points h3 { font-size: 16px; }
  .local-points p { font-size: 16px; }
  .download-card { border-radius: 20px; padding: 33px 19px; }
  .download-card h2 { font-size: 26px; }
  .download-copy > p:not(.eyebrow) { font-size: 16px; }
  .download-card .eyebrow { font-size: 10px; }
  .download-facts { font-size: 11px; gap: 8px 13px; }
  .download-footnote { grid-template-columns: 1fr; gap: 0; font-size: 11px; }
  .install-details summary { justify-content: space-between; }
  .faq-list summary { font-size: 16px; }
  .faq-list details > p { font-size: 16px; }
  .site-footer { flex-wrap: wrap; gap: 8px 16px; padding-block: 24px; }
  .site-footer .text-link { margin-left: auto; }
  .site-footer > p { order: 3; width: 100%; font-size: 11px; }
}
@media (max-width: 360px) {
  .container { width: calc(100% - 32px); }
  .hero-actions { gap: 4px 16px; }
  .hero-art { height: 415px; }
  .phone-front { width: 181px; right: 9px; }
  .phone-back { width: 154px; left: 9px; }
  .orbit-one { width: 265px; height: 265px; }
  .orbit-two { width: 282px; height: 282px; right: -3px; }
  .art-note { font-size: 10px; }
  .art-stamp strong { font-size: 12px; }
  .showcase { padding-inline: 16px; }
  .preview-tabs button { padding-inline: 7px; gap: 6px; }
  .download-card h2 { font-size: 23px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
@media print {
  .site-header { position: static; }
  .preview-tabs, .hero-art .orbit, .art-stamp { display: none; }
  .section { padding-block: 30px; }
}