:root {
  color-scheme: light;
  --canvas: #f6f7f0;
  --paper: #fffef9;
  --ink: #193d33;
  --green: #1c5748;
  --muted: #596c61;
  --lime: #d8f28c;
  --line: #dce3d8;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 30px; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { margin: 0; padding-inline: env(safe-area-inset-left) env(safe-area-inset-right); background: var(--canvas); color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; line-height: 1.75; -webkit-font-smoothing: antialiased; overflow-wrap: break-word; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 5px; }
a:focus-visible, summary:focus-visible, .screens-grid:focus-visible { outline: 3px solid #658e40; outline-offset: 4px; border-radius: 4px; }
::selection { background: var(--lime); color: var(--ink); }
.wrap { width: min(1080px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 20px; z-index: 10; padding: 10px 20px; background: var(--green); color: white; }
.skip-link:focus { top: 10px; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 26px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 20px; font-weight: 700; white-space: nowrap; }
.brand img { width: 42px; height: 42px; border-radius: 12px; }
.site-header nav, .site-footer nav { display: flex; align-items: center; gap: 28px; font-size: 14px; }
.site-header a, .site-footer a { display: inline-flex; align-items: center; min-height: 44px; }
.site-header nav a, .site-footer nav a { justify-content: center; min-width: 44px; padding-inline: 4px; }
.hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 45px; align-items: center; padding-block: 68px 84px; }
.hero > *, .faq-section > * { min-width: 0; }
.eyebrow { margin: 0 0 20px; font-size: 13px; font-weight: 600; letter-spacing: 0.12em; color: var(--green); }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--green); }
h1, h2, h3, p { margin-top: 0; }
.hero h1 { margin-bottom: 25px; font-size: clamp(40px, 4.7vw, 62px); line-height: 1.24; letter-spacing: -0.05em; font-weight: 750; }
.hero h1 span { color: #467663; }
.hero-description { margin-bottom: 29px; font-size: 18px; color: var(--muted); line-height: 1.9; }
.download-button { display: inline-flex; gap: 13px; align-items: center; padding: 12px 20px; min-width: 216px; border-radius: 16px; background: var(--green); color: white; box-shadow: 0 8px 20px #1c574814; }
.download-button:hover, .light-button:hover { text-decoration: none; background: #284b3a; color: white; }
.download-button small { display: block; font-size: 10px; line-height: 1.4; letter-spacing: 0.12em; }
.download-button strong { display: block; font-size: 23px; line-height: 1.4; font-weight: 550; }
.button-arrow { margin-left: auto; font-size: 22px; }
.platform-note { margin: 15px 0 32px; color: var(--muted); font-size: 12px; }
.mobile-note { display: none; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.hero-tags span { border: 1px solid var(--line); padding: 5px 11px; border-radius: 6px; font-size: 12px; }
.hero-visual { position: relative; isolation: isolate; display: flex; flex-direction: column; align-items: center; }
.visual-orbit { position: absolute; z-index: -1; width: 115%; aspect-ratio: 1; top: 13%; border-radius: 50%; background: #e7eddb; }
.hero-screenshot { width: 278px; border-radius: 20px; transform: rotate(3deg); box-shadow: 0 25px 45px #193d331a; }
.visual-caption { margin: 23px 0 0; font-size: 12px; letter-spacing: 0.15em; color: var(--muted); }
.features-section, .screens-section, .faq-section { padding-block: 64px; border-top: 1px solid var(--line); }
.section-heading { margin-bottom: 34px; }
.section-heading .eyebrow { margin-bottom: 10px; }
h2 { margin-bottom: 13px; font-size: clamp(25px, 3vw, 36px); letter-spacing: -0.035em; line-height: 1.4; }
.section-heading > p:last-child { margin-bottom: 0; color: var(--muted); font-size: 15px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card { background: var(--paper); border: 1px solid #e6eadf; border-radius: 18px; padding: 25px; }
.feature-number { font-size: 11px; font-weight: 650; letter-spacing: 0.1em; color: #5a7463; }
.feature-card h3 { margin: 20px 0 12px; font-size: 19px; letter-spacing: -0.02em; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.9; }
.more-features { margin-top: 20px; }
.more-features > summary { width: fit-content; color: var(--green); font-size: 14px; }
.more-features .feature-grid { margin-top: 16px; }
.more-features h3 { margin-top: 0; }
.screens-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.screens-grid a { display: block; border-radius: 18px; }
.screens-hint { display: none; }
figure { margin: 0; min-width: 0; }
.screens-grid img { width: 100%; border-radius: 18px; border: 1px solid var(--line); }
figcaption { margin-top: 18px; font-size: 13px; text-align: center; }
figcaption span { margin-right: 5px; color: var(--muted); font-size: 11px; }
.section-note { margin: 22px 0 0; font-size: 12px; color: var(--muted); text-align: center; }
.faq-section { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 54px; }
.faq-list details { border-bottom: 1px solid var(--line); padding-block: 21px; }
.faq-list details:first-child { padding-top: 0; }
summary { cursor: pointer; font-weight: 600; font-size: 16px; padding: 8px 12px 8px 0; min-height: 44px; }
.faq-list details p { margin: 15px 0 0; color: var(--muted); font-size: 14px; }
.faq-list details a, .policy a:not(.back-link):not(.policy-toc a) { text-decoration: underline; text-underline-offset: 3px; }
.download-section { margin-top: 20px; padding: 42px; border-radius: 24px; display: flex; align-items: center; justify-content: space-between; gap: 24px; background: var(--green); color: var(--paper); }
.download-section .eyebrow { color: var(--lime); margin-bottom: 14px; }
.download-section h2 { margin-bottom: 16px; }
.light-button { display: inline-flex; align-items: center; gap: 40px; white-space: nowrap; background: var(--lime); color: var(--ink); border-radius: 12px; padding: 14px 21px; font-size: 14px; font-weight: 600; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-block: 32px 38px; color: var(--muted); font-size: 12px; }
.site-footer nav { gap: 23px; font-size: 12px; }
.policy { max-width: 790px; padding-block: 45px 40px; }
.back-link { display: inline-flex; align-items: center; min-height: 44px; margin-bottom: 28px; font-size: 14px; color: var(--green); }
.policy h1 { font-size: clamp(32px, 5vw, 43px); letter-spacing: -0.04em; line-height: 1.4; margin-bottom: 12px; }
.policy .policy-date { display: flex; flex-wrap: wrap; gap: 4px 20px; color: var(--muted); font-size: 13px; }
.policy-date span { white-space: nowrap; }
.policy-intro { padding: 24px; border-radius: 16px; background: #eaf0e2; margin-block: 26px; }
.policy-intro p:last-child { margin-bottom: 0; }
.policy p, .policy li { font-size: 15px; line-height: 1.95; }
.policy ul, .policy ol { padding-left: 23px; }
.policy li { margin-block: 8px; }
.policy h2 { margin: 42px 0 14px; font-size: 23px; }
.policy h3 { font-size: 17px; margin: 22px 0 10px; }
.policy-toc { padding: 20px 24px; border: 1px solid var(--line); border-radius: 14px; }
.policy-toc p { font-weight: 600; margin-bottom: 10px; }
.policy-toc ol { margin: 0; columns: 2; column-gap: 25px; }
.policy-toc li { margin: 3px 0; font-size: 14px; break-inside: avoid; }
.policy-toc a { display: inline-flex; align-items: center; min-height: 44px; }
.policy .policy-note { border-left: 3px solid #84a471; padding: 13px 18px; background: #eaf0e2; }

@media (max-width: 820px) {
  .hero { gap: 25px; padding-top: 52px; }
  .hero-screenshot { width: 238px; }
  .hero-description { font-size: 16px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .faq-section { gap: 30px; }
  .screens-grid { gap: 16px; }
  figcaption { font-size: 12px; }
}

@media (max-width: 700px) {
  .wrap { width: calc(100% - 40px); }
  .site-header { padding-block: max(12px, env(safe-area-inset-top)) 12px; gap: 12px; }
  .brand { font-size: 17px; gap: 9px; }
  .brand img { width: 35px; height: 35px; border-radius: 10px; }
  .site-header nav { gap: 12px; font-size: 14px; }
  .site-header .features-link { display: none; }
  .hero { grid-template-columns: 1fr; padding-block: 36px 32px; gap: 0; }
  .hero h1 { font-size: clamp(36px, 10.8vw, 48px); margin-bottom: 16px; line-height: 1.25; }
  .hero-description { font-size: 16px; margin-bottom: 24px; line-height: 1.75; }
  .download-button { width: 100%; max-width: 360px; min-height: 58px; padding: 8px 18px; border-radius: 13px; box-shadow: none; }
  .download-button strong { font-size: 21px; }
  .platform-note { margin-block: 12px 0; font-size: 11px; }
  .mobile-note { display: inline; }
  .hero .eyebrow, .hero-tags, .hero-visual { display: none; }
  .section-heading .eyebrow, .download-section .eyebrow { display: none; }
  .features-section, .screens-section, .faq-section { padding-block: 32px; }
  .section-heading { margin-bottom: 24px; }
  .section-heading h2 { font-size: clamp(22px, 6vw, 28px); margin-bottom: 0; }
  .feature-grid { grid-template-columns: 1fr; gap: 0; }
  .feature-card { display: grid; grid-template-columns: 28px minmax(0, 1fr); column-gap: 12px; padding: 20px 0; border: 0; border-radius: 0; background: transparent; }
  .feature-card:first-child { padding-top: 0; }
  .feature-card + .feature-card { border-top: 1px solid var(--line); }
  .feature-number { grid-row: 1 / 3; padding-top: 3px; font-size: 12px; }
  .feature-card h3 { margin: 0 0 6px; font-size: 17px; }
  .feature-card p { grid-column: 2; font-size: 14px; line-height: 1.75; }
  .more-features { margin-top: 0; border-top: 1px solid var(--line); }
  .more-features > summary { padding-block: 16px; }
  .more-features .feature-grid { margin-top: 4px; }
  .more-features .feature-card { display: block; }
  .screens-section .section-heading { margin-bottom: 12px; }
  .screens-hint { display: flex; justify-content: space-between; margin: 0 0 20px; color: var(--muted); font-size: 12px; }
  .screens-grid { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: min(66vw, 224px); gap: 16px; width: 100%; min-width: 0; overflow-x: auto; overscroll-behavior-x: contain; scroll-snap-type: x mandatory; padding-block: 4px 14px; scrollbar-width: thin; scrollbar-color: #9daf99 transparent; }
  .screens-grid figure { scroll-snap-align: start; }
  figcaption { font-size: 13px; margin-top: 12px; }
  .section-note { text-align: left; font-size: 11px; margin-top: 16px; }
  .faq-section { grid-template-columns: 1fr; gap: 5px; }
  .faq-section .section-heading { margin-bottom: 20px; }
  .faq-list details { padding-block: 8px; }
  .faq-list summary { font-size: 15px; }
  .faq-list details p { font-size: 15px; line-height: 1.8; }
  .download-section { margin-top: 0; padding: 24px; flex-direction: column; align-items: flex-start; gap: 20px; border-radius: 18px; }
  .download-section h2 { font-size: 24px; margin-bottom: 0; }
  .light-button { width: 100%; min-height: 52px; justify-content: space-between; gap: 16px; }
  .site-footer { flex-wrap: wrap; gap: 12px; padding-block: 20px max(20px, env(safe-area-inset-bottom)); }
  .site-footer nav { gap: 16px; font-size: 14px; }
  .policy { padding-top: 20px; }
  .back-link { margin-bottom: 18px; }
  .policy p, .policy li { line-height: 1.85; }
  .policy h2 { font-size: 21px; margin-top: 32px; }
  .policy-intro { padding: 20px; }
  .policy-toc { padding: 16px 20px; }
  .policy-toc ol { columns: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}