:root {
  color-scheme: light;
  --paper: #f7f5ee;
  --surface: #fffcf5;
  --ink: #23342b;
  --muted: #4f6054;
  --olive: #384d37;
  --accent: #dbe3cf;
  --line: #d8ddd0;
  --serif: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  font-family: var(--sans);
  font-size: 100%;
  background: var(--paper);
  color: var(--ink);
}

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; font-size: 1rem; line-height: 1.72; overflow-wrap: anywhere; }
img { display: block; max-inline-size: 100%; block-size: auto; }
a { color: var(--olive); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 0.12em; }
:focus-visible { outline: 3px solid #6a482a; outline-offset: 4px; }
main:focus { outline-offset: -3px; }
section[id], main[id] { scroll-margin-block-start: 1.5rem; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2 { font-family: var(--serif); line-height: 1.3; }
h2 { font-size: clamp(1.45rem, 3vw, 2.35rem); }

.container { width: min(100% - 3.5rem, 75rem); margin-inline: auto; }
.skip-link { position: fixed; z-index: 3; inset-block-start: 0.5rem; inset-inline-start: 0.5rem; transform: translateY(-170%); padding: 0.5rem 0.85rem; background: var(--surface); border-radius: 0.35rem; }
.skip-link:focus { transform: none; }
.masthead { border-block-end: 1px solid var(--line); }
.topbar, .footer-grid { display: flex; align-items: center; justify-content: space-between; gap: 1rem 2rem; min-height: 4.75rem; padding-block: 0.75rem; }
.brand { display: inline-flex; gap: 0.6rem; align-items: center; min-height: 2.75rem; font-weight: 750; color: var(--ink); text-decoration: none; white-space: nowrap; }
.brand-mark { display: grid; place-items: center; width: 2rem; height: 2rem; color: var(--surface); background: var(--olive); border-radius: 45%; font-size: 1.12rem; }
nav { display: flex; align-items: center; flex-wrap: wrap; gap: 0.15rem 1.25rem; }
nav a { display: inline-flex; align-items: center; min-height: 2.75rem; font-size: 0.94rem; font-weight: 640; text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { text-decoration: underline; }
.preview-note { display: inline-block; margin-block-start: 1.1rem; padding: 0.2rem 0.65rem; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 0.83rem; }

.hero { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: clamp(1.8rem, 6vw, 5.5rem); align-items: center; padding-block: clamp(2rem, 6vw, 5.25rem); }
.hero.hero-text { grid-template-columns: minmax(0, 1fr); }
.hero-copy { max-width: 40rem; }
.hero h1 { font-size: clamp(2.2rem, 5.15vw, 4.65rem); line-height: 1.24; letter-spacing: -0.035em; }
.hero h1 span { color: #556b42; }
.hero-description { margin-block: 1.35rem 1.6rem; max-width: 34rem; color: var(--muted); font-size: clamp(1rem, 1.7vw, 1.23rem); }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 0.65rem 1rem; }
.button { display: inline-flex; min-height: 2.8rem; align-items: center; justify-content: center; padding: 0.6rem 1.14rem; border-radius: 0.5rem; background: var(--olive); color: #fffcf5; text-decoration: none; font-weight: 700; }
.button:hover { background: #2b402d; }
.launch-note { color: var(--muted); font-size: 0.9rem; }
.app-figure { display: grid; justify-items: center; gap: 0.8rem; padding: clamp(1rem, 4vw, 2rem); border: 1px solid #d0d8c5; border-radius: 1.25rem; background: #e5e9dc; }
.app-figure img { inline-size: min(100%, 18rem); border: 1px solid #c2ccba; border-radius: 0.85rem; box-shadow: 0 0.6rem 1.35rem #26342a16; background: var(--surface); }
.app-figure figcaption { color: var(--muted); font-size: 0.79rem; text-align: center; }

.feature-section { padding-block: 2rem 3rem; border-block-start: 1px solid var(--line); }
.feature-section h2 { max-width: 33rem; margin-block-end: 1.25rem; }
.feature-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 1.6rem; }
.feature-list article { border-block-start: 1px solid var(--line); padding-block: 1.05rem 1.15rem; }
.feature-list h3 { font-size: 1.13rem; }
.feature-list p, .weather-note p, .family-preview p { color: var(--muted); margin-block-start: 0.4rem; }
.weather-note { display: grid; align-items: center; gap: 1rem 2rem; background: var(--accent); border-radius: 0.85rem; padding: clamp(1.1rem, 4vw, 2rem); }
.weather-note-with-image { grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); }
.weather-note h2 { font-size: clamp(1.3rem, 2.4vw, 1.65rem); }
.weather-note p { max-width: 41rem; }
.text-link { display: inline-flex; min-height: 2.75rem; align-items: center; gap: 0.35rem; font-weight: 700; }
.weather-help { margin-block-start: 0.25rem; font-size: 0.9rem; }
.weather-preview { width: min(100%, 30rem); justify-self: center; }
.weather-preview img { width: 100%; border: 1px solid #c2ccba; border-radius: 0.75rem; background: var(--surface); }
.weather-preview figcaption { margin-block-start: 0.55rem; text-align: center; color: var(--muted); font-size: 0.83rem; }
.family-preview { display: grid; grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr); gap: 2.5rem; align-items: center; padding-block-start: 2.8rem; }
.app-figure-small img { inline-size: min(100%, 14rem); }

.document { max-width: 54rem; padding-block-start: clamp(2rem, 6vw, 3.75rem); }
.document-title { padding-block-end: 1.35rem; border-block-end: 1px solid var(--line); }
.document-title h1 { font-size: clamp(2rem, 5vw, 3.45rem); }
.document-title p { margin-block-start: 0.55rem; color: var(--muted); }
.document-body section { padding-block-start: 1.65rem; }
.document-body h2 { font-size: clamp(1.25rem, 2.7vw, 1.6rem); }
.document-body p { margin-block-start: 0.65rem; }
.document-body ol { padding-inline-start: 1.6em; }
.document-body li + li { margin-block-start: 0.35rem; }
.document-body .button { margin-block: 0.5rem; }
.policy-details { margin: 0.9rem 0 0; border-block-start: 1px solid var(--line); }
.policy-details > div { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2fr); gap: 0.35rem 1rem; padding-block: 0.55rem; border-block-end: 1px solid var(--line); }
.policy-details dt { font-weight: 700; }
.policy-details dd { margin: 0; color: var(--muted); }
.faq { margin-block-start: 0.75rem; border-block-start: 1px solid var(--line); }
.faq details { border-block-end: 1px solid var(--line); }
.faq summary { min-height: 2.75rem; padding-block: 0.65rem; font-weight: 690; cursor: pointer; }
.faq details p { margin: 0 0 0.9rem; color: var(--muted); }
.footer { margin-block-start: 3.3rem; border-block-start: 1px solid var(--line); }
.footer-grid { padding-block: 1rem; }

@media (max-width: 56rem) {
  .container { width: min(100% - 2.5rem, 75rem); }
  .feature-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero { gap: 1.5rem; }
}

@media (max-width: 43rem) {
  .container { width: calc(100% - 2rem); }
  .topbar, .footer-grid { align-items: flex-start; flex-direction: column; gap: 0.15rem; }
  nav { gap: 0 0.85rem; }
  .hero, .family-preview, .weather-note-with-image { grid-template-columns: minmax(0, 1fr); }
  .hero { padding-block: 2.2rem; }
  .hero h1 { font-size: clamp(1.95rem, 8.3vw, 3.2rem); }
  .wide-break { display: none; }
  .hero-description { margin-block: 1rem 1.25rem; }
  .app-figure { width: min(100%, 26rem); }
  .footer { margin-block-start: 2.5rem; }
}

@media (max-width: 26rem) {
  .feature-list, .policy-details > div { grid-template-columns: minmax(0, 1fr); }
  .hero-actions { align-items: flex-start; flex-direction: column; }
}