:root {
  --paper: #f5f1e8;
  --ivory: #fbf8f1;
  --sand: #e9e0d2;
  --ink: #20342d;
  --forest: #244c3c;
  --forest-deep: #18352a;
  --terracotta: #b96345;
  --terracotta-dark: #91472f;
  --gold: #c79a4b;
  --body: #545b55;
  --muted: #7e8079;
  --line: rgba(43, 63, 53, .14);
  --white: #fffdf8;
  --shadow: 0 22px 70px rgba(57, 46, 31, .10);
  --max: 1160px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "Noto Sans TC", "Microsoft JhengHei", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
}
img { max-width: 100%; }
a { color: inherit; }
.wrap { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.skip-link { position: fixed; left: 12px; top: -64px; z-index: 999; padding: 8px 12px; border-radius: 8px; background: var(--ink); color: white; }
.skip-link:focus { top: 12px; }

.audience-bar { background: var(--forest-deep); color: #edf1e9; }
.audience-inner { min-height: 48px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.audience-inner > span { color: #b8c5bb; font-size: 12px; letter-spacing: .08em; }
.audience-tabs { display: inline-flex; gap: 4px; padding: 4px; border: 1px solid rgba(255,255,255,.13); border-radius: 12px; background: rgba(255,255,255,.04); }
.audience-tabs a { min-height: 32px; display: inline-flex; align-items: center; padding: 0 13px; border-radius: 8px; color: #c7d0c8; font-size: 12px; font-weight: 750; text-decoration: none; }
.audience-tabs a:hover { color: white; }
.audience-tabs a.active { color: var(--forest-deep); background: #f2dfb7; }

.site-header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid var(--line); background: rgba(245,241,232,.88); backdrop-filter: blur(18px); }
.nav-wrap { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; }
.brand > img { width: 42px; height: 42px; object-fit: cover; border: 1px solid rgba(199,154,75,.45); border-radius: 13px; box-shadow: 0 8px 22px rgba(37,43,34,.12); }
.brand span { display: grid; line-height: 1.12; }
.brand strong { font-family: Georgia, "Noto Serif TC", serif; font-size: 18px; font-weight: 500; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 10px; letter-spacing: .12em; }
nav { display: flex; gap: 24px; }
nav a { color: var(--body); font-size: 14px; font-weight: 600; text-decoration: none; }
nav a:hover, nav a:focus-visible { color: var(--terracotta-dark); }

.hero { padding: 82px 0 90px; overflow: hidden; background: radial-gradient(circle at 85% 12%, rgba(199,154,75,.14), transparent 28rem), var(--paper); }
.hero-grid { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); align-items: center; gap: 72px; }
.overline { margin: 0 0 15px; color: var(--terracotta-dark); font-size: 11px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
h1, h2, h3 { font-family: Georgia, "Noto Serif TC", serif; font-weight: 500; }
h1 { margin: 0; max-width: 660px; font-size: clamp(48px, 6vw, 76px); line-height: 1.12; letter-spacing: -.035em; }
.lead { max-width: 660px; margin: 28px 0 0; color: var(--body); font-size: clamp(17px, 2vw, 20px); }
.lead strong { color: var(--ink); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 0 20px; border: 1px solid transparent; border-radius: 12px; font-size: 14px; font-weight: 750; text-decoration: none; transition: transform .18s ease, background .18s ease; }
.button:hover { transform: translateY(-1px); }
.button.primary { color: var(--white); background: var(--terracotta); box-shadow: 0 0 0 1px rgba(145,71,47,.15), 0 9px 24px rgba(145,71,47,.17); }
.button.primary:hover { background: var(--terracotta-dark); }
.button.secondary { border-color: var(--line); background: rgba(255,253,248,.68); }
.button.dark { color: var(--white); background: var(--forest-deep); }
.public-note { display: flex; align-items: center; gap: 9px; margin: 22px 0 0; color: var(--muted); font-size: 12px; }
.public-note span { width: 7px; height: 7px; border-radius: 50%; background: #669b7a; box-shadow: 0 0 0 5px rgba(102,155,122,.12); }
.hero-art { margin: 0; position: relative; overflow: hidden; border: 8px solid rgba(255,253,248,.72); border-radius: 34px; background: #071322; box-shadow: var(--shadow); }
.hero-art img { width: 100%; display: block; aspect-ratio: 1.53 / 1; object-fit: cover; }
.hero-art figcaption { position: absolute; right: 18px; bottom: 15px; padding: 7px 12px; border: 1px solid rgba(231,190,106,.28); border-radius: 999px; color: #f5e5bd; background: rgba(4,12,23,.76); backdrop-filter: blur(10px); font-size: 11px; letter-spacing: .08em; }

.section { padding: 104px 0; border-top: 1px solid var(--line); }
.story { background: var(--ivory); }
.story-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 90px; }
h2 { margin: 0; font-size: clamp(38px, 4.6vw, 58px); line-height: 1.2; letter-spacing: -.025em; }
.story-copy { color: var(--body); font-size: 18px; }
.story-copy p:first-child { margin-top: 0; }
blockquote { margin: 35px 0 0; padding: 24px 28px; border-left: 4px solid var(--terracotta); border-radius: 0 16px 16px 0; color: var(--forest-deep); background: var(--paper); font-family: Georgia, "Noto Serif TC", serif; font-size: 22px; }
.section-heading { max-width: 780px; margin-bottom: 48px; }
.section-heading > p:last-child { color: var(--body); font-size: 17px; }
.section-heading.centered { margin-inline: auto; text-align: center; }
.scene-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.scene-card { position: relative; min-height: 330px; padding: 30px; border: 1px solid var(--line); border-radius: 22px; background: rgba(255,253,248,.78); box-shadow: 0 0 0 1px rgba(255,255,255,.4); }
.scene-card:nth-child(2), .scene-card:nth-child(5) { background: #eee6d8; }
.scene-no { display: block; margin-bottom: 40px; color: var(--terracotta); font: 700 12px/1 system-ui, sans-serif; letter-spacing: .15em; }
.scene-card h3 { margin: 0; font-size: 27px; }
.scene-card p { color: var(--body); }
.scene-card ul { margin: 20px 0 0; padding: 18px 0 0; border-top: 1px solid var(--line); list-style: none; }
.scene-card li { color: var(--forest); font-size: 13px; font-weight: 700; }
.scene-card li + li { margin-top: 5px; }
.scene-card li::before { content: "—"; margin-right: 8px; color: var(--gold); }

.how { color: #f4f0e7; background: var(--forest-deep); }
.how .overline { color: #e3b976; }
.how .section-heading > p:last-child { color: #b9c5bb; }
.steps { max-width: 900px; margin: 54px auto 0; padding: 0; list-style: none; }
.steps li { display: grid; grid-template-columns: 58px 1fr; gap: 24px; padding: 28px 0; border-top: 1px solid rgba(255,255,255,.14); }
.steps li:last-child { border-bottom: 1px solid rgba(255,255,255,.14); }
.steps > li > span { width: 48px; height: 48px; display: grid; place-items: center; border: 1px solid rgba(227,185,118,.42); border-radius: 50%; color: #efd49e; font-family: Georgia, serif; }
.steps h3 { margin: 0; font-size: 25px; }
.steps p { margin: 6px 0 0; color: #b9c5bb; }

.conversations { background: var(--ivory); }
.conversation-grid { display: grid; grid-template-columns: minmax(0, .85fr) minmax(320px, .65fr); align-items: center; gap: 100px; }
.example-note { max-width: 530px; color: var(--muted); font-size: 13px; }
.phone { max-width: 430px; justify-self: end; padding: 22px; border: 8px solid #24332c; border-radius: 34px; background: #eee8de; box-shadow: var(--shadow); }
.phone-top { display: flex; align-items: center; gap: 11px; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
.phone-top img { width: 42px; height: 42px; object-fit: cover; border-radius: 12px; }
.phone-top div { display: grid; }
.phone-top small { color: var(--muted); }
.bubble { width: fit-content; max-width: 88%; margin-top: 16px; padding: 12px 15px; border-radius: 16px; font-size: 14px; }
.bubble.user { margin-left: auto; color: white; background: var(--forest); border-bottom-right-radius: 5px; }
.bubble.nana { color: var(--ink); background: var(--white); border-bottom-left-radius: 5px; box-shadow: 0 0 0 1px var(--line); }

.trust { background: #eee6d8; }
.trust-intro { display: grid; grid-template-columns: .55fr 1.25fr; gap: 55px; align-items: end; }
.trust-intro .overline { grid-column: 1 / -1; margin-bottom: -30px; }
.trust-intro p:last-child { margin: 0 0 8px; color: var(--body); font-size: 17px; }
.trust-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 50px; }
.trust-grid article { padding: 24px; border: 1px solid rgba(36,76,60,.18); border-radius: 18px; background: rgba(251,248,241,.52); }
.trust-grid span { color: var(--terracotta); font-size: 11px; font-weight: 800; letter-spacing: .13em; }
.trust-grid h3 { margin: 25px 0 10px; font-size: 22px; }
.trust-grid p { margin: 0; color: var(--body); font-size: 14px; }

.builder-cta { background: var(--paper); }
.cta-card { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 48px; border-radius: 26px; color: #edf1e9; background: var(--forest); box-shadow: var(--shadow); }
.cta-card h2 { font-size: clamp(32px, 4vw, 48px); }
.cta-card p:last-child { color: #c5d0c7; }
.cta-card .overline { color: #edc988; }
.cta-card .button.dark { flex: 0 0 auto; background: #0f2a20; }
footer { padding: 36px 0; background: var(--ivory); border-top: 1px solid var(--line); }
.footer-wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-wrap p { color: var(--muted); font-size: 12px; text-align: right; }
.footer-brand > img { width: 38px; height: 38px; }

@media (max-width: 940px) {
  .hero-grid, .story-grid, .conversation-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-art { max-width: 760px; }
  .scene-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .conversation-grid > div:first-child { max-width: 720px; }
  .phone { justify-self: start; }
  .trust-intro { grid-template-columns: 1fr; gap: 20px; align-items: start; }
  .trust-intro .overline { grid-column: auto; margin-bottom: 0; }
  .trust-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 680px) {
  .wrap { width: min(calc(100% - 26px), var(--max)); }
  .audience-inner { align-items: flex-start; flex-direction: column; gap: 7px; padding-block: 10px; }
  .audience-tabs { width: 100%; }
  .audience-tabs a { flex: 1; justify-content: center; }
  nav { display: none; }
  .site-header { position: static; }
  .hero { padding: 58px 0 66px; }
  h1 { font-size: 43px; }
  h2 { font-size: 36px; }
  .hero-grid { gap: 38px; }
  .hero-art { border-width: 5px; border-radius: 24px; }
  .section { padding: 74px 0; }
  .scene-grid, .trust-grid { grid-template-columns: 1fr; }
  .scene-card { min-height: auto; }
  .scene-no { margin-bottom: 24px; }
  .steps li { grid-template-columns: 48px 1fr; gap: 16px; }
  .conversation-grid { gap: 38px; }
  .phone { width: 100%; padding: 15px; border-width: 6px; border-radius: 27px; }
  .cta-card, .footer-wrap { align-items: flex-start; flex-direction: column; }
  .cta-card { padding: 30px 24px; }
  .cta-card .button { width: 100%; }
  .footer-wrap p { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}