:root {
  --ink: #1d2422;
  --muted: #6b736e;
  --paper: #f6f0e7;
  --line: #d9cec0;
  --film: #b9362c;
  --film-deep: #8f2723;
  --ai: #163e3a;
  --ai-deep: #0c2b29;
  --cream: #f4e8d6;
  --gold: #e7bd68;
  --max: 1260px;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--paper); }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--paper); font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
.portal { min-height: 100vh; overflow: hidden; }
.topbar, .hero-intro, .footnote { width: min(var(--max), calc(100% - 96px)); margin: 0 auto; }
.topbar { display: flex; align-items: center; justify-content: space-between; min-height: 104px; border-bottom: 1px solid var(--line); }
.logo { display: inline-flex; align-items: center; width: 146px; }
.logo img { display: block; width: 100%; height: auto; }
.topbar-meta { display: flex; align-items: center; gap: 28px; }
.business-links { display: inline-flex; align-items: center; gap: 16px; }
.business-links a { color: var(--ink); font-size: 12px; font-weight: 700; letter-spacing: .03em; }
.business-links a:hover { color: var(--film); }
.business-links a + a { padding-left: 16px; border-left: 1px solid var(--line); }
.top-note, .top-index { color: var(--muted); font-size: 11px; letter-spacing: .08em; }
.top-index { color: var(--ink); font-variant-numeric: tabular-nums; }
.hero-intro { padding: 64px 0 58px; }
.eyebrow { margin: 0 0 17px; color: var(--film); font-size: 10px; font-weight: 800; letter-spacing: .18em; }
.intro-row { display: flex; align-items: end; justify-content: space-between; gap: 32px; }
h1 { margin: 0; font-size: clamp(37px, 5vw, 68px); font-weight: 700; letter-spacing: 0; line-height: 1; }
.intro-copy { max-width: 250px; margin: 0 2px 3px 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.choice-stack { display: grid; gap: 0; }
.choice { position: relative; display: block; overflow: hidden; color: var(--cream); transition: filter .25s ease; }
.choice:hover, .choice:focus-visible { filter: brightness(1.05); }
.choice-inner { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; gap: clamp(46px, 8vw, 132px); width: min(var(--max), calc(100% - 96px)); min-height: 500px; margin: 0 auto; padding: 54px 0; }
.choice-film { background: var(--film); }
.choice-ai { background: var(--ai); }
.choice-copy { position: relative; z-index: 1; max-width: 480px; }
.choice-film .choice-copy { justify-self: start; }
.choice-ai .choice-copy { justify-self: end; }
.choice-index { display: block; margin-bottom: 27px; color: rgba(255, 239, 215, .72); font-size: 11px; font-weight: 800; letter-spacing: .17em; }
.choice-ai .choice-index { color: rgba(232, 223, 198, .76); }
h2 { margin: 0; color: var(--cream); font-size: clamp(49px, 6vw, 86px); font-weight: 700; letter-spacing: 0; line-height: .98; }
h2 em { color: #f6d1a8; font-style: normal; }
.choice-ai h2 em { color: var(--gold); }
.choice-copy p { max-width: 390px; margin: 30px 0 0; color: rgba(255, 247, 231, .78); font-size: 14px; line-height: 1.8; }
.choice-ai .choice-copy p { color: rgba(242, 238, 218, .76); }
.choice-action { display: inline-flex; align-items: center; gap: 21px; margin-top: 34px; padding-bottom: 9px; border-bottom: 1px solid currentColor; color: var(--cream); font-size: 13px; font-weight: 800; }
.choice-action b { color: #f6d1a8; font-size: 20px; font-weight: 400; line-height: 1; }
.choice-ai .choice-action b { color: var(--gold); }
.choice-visual { display: flex; flex-direction: column; align-items: flex-end; gap: 14px; }
.choice-ai .choice-visual { align-items: flex-start; }
.visual-label { color: rgba(255, 239, 215, .62); font-size: 10px; font-weight: 800; letter-spacing: .17em; }
.choice-ai .visual-label { color: rgba(232, 223, 198, .63); }
.image-frame { display: block; width: min(100%, 470px); aspect-ratio: 4 / 3; padding: 13px; background: var(--cream); border: 1px solid rgba(43, 30, 24, .35); box-shadow: 18px 18px 0 rgba(71, 25, 20, .24); }
.choice-ai .image-frame { background: #ebe2d1; border-color: rgba(9, 31, 29, .6); box-shadow: -18px 18px 0 rgba(5, 26, 24, .38); }
.image-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
.footnote { display: flex; justify-content: space-between; padding: 19px 0 23px; border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; letter-spacing: .06em; }
.footnote span:first-child { color: var(--ink); font-weight: 800; }
:focus-visible { outline: 3px solid var(--gold); outline-offset: 5px; }

@media (max-width: 820px) {
  .topbar, .hero-intro, .footnote { width: min(100% - 42px, 600px); }
  .topbar { min-height: 82px; }
  .logo { width: 128px; }
  .top-note { display: none; }
  .business-links { gap: 10px; }
  .business-links a { font-size: 11px; }
  .business-links a + a { padding-left: 10px; }
  .hero-intro { padding: 45px 0 38px; }
  .intro-row { display: block; }
  h1 { font-size: clamp(37px, 10vw, 56px); }
  .intro-copy { margin-top: 16px; }
  .choice-inner { grid-template-columns: 1fr; gap: 40px; width: min(100% - 42px, 600px); min-height: 0; padding: 58px 0 70px; }
  .choice-ai .choice-inner { display: flex; flex-direction: column-reverse; }
  .choice-copy, .choice-film .choice-copy, .choice-ai .choice-copy { justify-self: start; max-width: 100%; }
  .choice-visual, .choice-ai .choice-visual { align-items: flex-start; width: 100%; }
  .image-frame { width: min(100%, 520px); }
  .choice-ai .image-frame { box-shadow: 12px 12px 0 rgba(5, 26, 24, .38); }
  h2 { font-size: clamp(51px, 15vw, 80px); }
  .choice-copy p { max-width: 480px; }
  .footnote { display: block; line-height: 1.8; }
  .footnote span { display: block; }
}

@media (max-width: 420px) {
  .topbar, .hero-intro, .footnote, .choice-inner { width: calc(100% - 30px); }
  .topbar-meta { gap: 0; }
  .top-index { font-size: 10px; }
  .top-index { display: none; }
  .choice-inner { padding: 45px 0 54px; }
  .choice-copy p { font-size: 13px; }
  .image-frame { padding: 9px; }
}