:root {
  --paper: #f3ead5;
  --paper-light: #fbf6e9;
  --ink: #211d19;
  --muted: #6f6659;
  --red: #9d2d27;
  --gold: #b88c48;
  --line: rgba(33, 29, 25, .16);
  --serif: "Songti SC", "STSong", "Noto Serif SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper-light); font-family: var(--sans); }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.hero {
  min-height: 100svh;
  position: relative;
  overflow: hidden;
  padding: 0 max(24px, calc((100vw - 1180px) / 2));
  background:
    radial-gradient(circle at 72% 18%, rgba(184, 140, 72, .18), transparent 30%),
    linear-gradient(118deg, var(--paper-light) 0 54%, #e6d8ba 54% 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .22;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.16'/%3E%3C/svg%3E");
}
.hero__ink { position: absolute; width: 560px; height: 560px; right: -170px; bottom: -180px; border: 80px solid rgba(33, 29, 25, .04); border-radius: 50%; }
.nav { position: relative; z-index: 2; height: 78px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { font-family: var(--serif); font-size: 20px; font-weight: 800; letter-spacing: .12em; }
.nav__link { color: var(--muted); font-size: 14px; }
.hero__content { position: relative; z-index: 1; min-height: calc(100svh - 78px); display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 8vw; padding: 60px 0 78px; }
.eyebrow { margin: 0 0 18px; color: var(--red); font-size: 13px; font-weight: 700; letter-spacing: .24em; }
h1, h2 { margin: 0; font-family: var(--serif); font-weight: 800; line-height: 1.14; letter-spacing: -.03em; }
h1 { font-size: clamp(52px, 6.4vw, 92px); }
h1 em { color: var(--red); font-style: normal; }
.title-line { display: block; white-space: nowrap; }
.hero__lead { max-width: 570px; margin: 28px 0 34px; color: #514a40; font-size: 18px; line-height: 1.9; }
.hero__actions { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.cta { display: inline-flex; min-height: 52px; align-items: center; justify-content: center; padding: 0 25px; border: 1px solid var(--ink); font-size: 15px; font-weight: 700; letter-spacing: .04em; transition: transform .2s, box-shadow .2s; }
.cta:hover { transform: translateY(-2px); }
.cta--primary { color: #fff9ec; background: var(--red); border-color: var(--red); box-shadow: 6px 6px 0 var(--ink); }
.cta--quiet { min-height: auto; padding: 10px 0; border: 0; }
.cta--quiet span { margin-left: 8px; }
.trust { display: flex; gap: 20px; margin: 28px 0 0; color: var(--muted); font-size: 12px; }
.trust span::before { content: "✓"; margin-right: 6px; color: var(--red); font-weight: 800; }

.hero__visual { position: relative; width: min(100%, 440px); margin: 0 auto; }
.portrait { margin: 0; padding: 11px; background: #f8f0de; border: 1px solid rgba(33, 29, 25, .35); box-shadow: 18px 22px 0 rgba(33, 29, 25, .1); transform: rotate(1.6deg); }
.portrait img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; object-position: center 35%; filter: saturate(.86) contrast(1.03); }
.portrait figcaption { display: flex; align-items: baseline; justify-content: space-between; padding: 16px 10px 7px; font-family: var(--serif); }
.portrait figcaption span { color: var(--red); font-size: 25px; font-weight: 800; }
.portrait figcaption strong { font-size: 14px; letter-spacing: .14em; }
.seal { position: absolute; z-index: 2; top: -22px; right: -20px; width: 76px; height: 76px; display: grid; place-items: center; color: var(--red); border: 3px double var(--red); font-family: var(--serif); font-size: 20px; font-weight: 900; transform: rotate(8deg); background: rgba(243,234,213,.86); }
.floating-skill { position: absolute; left: -45px; bottom: 90px; padding: 13px 18px; color: var(--paper-light); background: var(--ink); font-family: var(--serif); font-size: 14px; letter-spacing: .08em; transform: rotate(-2deg); }

.rewards, .steps { max-width: 1180px; margin: 0 auto; padding: 120px 24px; }
.section-heading { display: grid; grid-template-columns: .7fr 1.3fr; align-items: end; gap: 50px; margin-bottom: 58px; }
.section-heading .eyebrow { align-self: start; }
h2 { font-size: clamp(36px, 5vw, 62px); }
.reward-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.reward-grid article { min-height: 270px; padding: 25px 25px 34px; border-right: 1px solid var(--line); }
.reward-grid article:last-child { border-right: 0; }
.reward-num { color: var(--red); font-family: var(--serif); font-size: 13px; }
.reward-grid h3 { margin: 72px 0 13px; font-family: var(--serif); font-size: 24px; }
.reward-grid p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

.duel { min-height: 600px; display: grid; grid-template-columns: 1fr 1.25fr 1fr; align-items: center; gap: 7vw; padding: 100px max(24px, calc((100vw - 1360px) / 2)); color: #f5ead4; background: var(--ink); overflow: hidden; }
.duel__center { text-align: center; }
.duel__center h2 { font-size: clamp(32px, 3.6vw, 48px); }
.duel__center > p:last-child { max-width: 580px; margin: 28px auto 0; color: #bdb3a2; line-height: 1.9; }
.duel__card { display: flex; min-height: 245px; flex-direction: column; justify-content: center; padding: 30px; border: 1px solid rgba(243,234,213,.3); background: rgba(243,234,213,.04); }
.duel__card--left { transform: rotate(-6deg); }
.duel__card--right { transform: rotate(6deg); }
.duel__card small { color: #cba762; letter-spacing: .18em; }
.duel__card strong { margin: 24px 0 13px; font-family: var(--serif); font-size: 27px; }
.duel__card span { color: #aaa08f; font-size: 13px; line-height: 1.7; }

.section-heading--center { display: block; max-width: 760px; margin: 0 auto 70px; text-align: center; }
.steps ol { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; margin: 0; padding: 0; list-style: none; }
.steps li { position: relative; padding: 30px 0 0; border-top: 1px solid var(--ink); }
.steps li > span { color: var(--red); font-family: var(--serif); font-size: 14px; }
.steps li strong { display: block; margin: 38px 0 12px; font-family: var(--serif); font-size: 26px; }
.steps li p { max-width: 290px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

.final-cta { position: relative; overflow: hidden; padding: 115px 24px 105px; text-align: center; background: var(--paper); border-top: 1px solid var(--line); }
.final-cta__mark { position: absolute; inset: -90px 0 auto; margin: 0; color: rgba(157,45,39,.045); font-family: var(--serif); font-size: 430px; font-weight: 900; line-height: 1; }
.final-cta > *:not(.final-cta__mark) { position: relative; }
.final-cta h2 { margin-bottom: 42px; }
.final-cta > p:last-child { margin: 25px 0 0; color: var(--muted); font-size: 12px; }
footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 28px max(24px, calc((100vw - 1180px) / 2)); color: #a39a8b; background: var(--ink); font-size: 12px; }
footer .brand { color: #efe2ca; font-size: 16px; }

@media (max-width: 800px) {
  .hero { min-height: auto; padding: 0 20px; background: radial-gradient(circle at 75% 35%, rgba(184,140,72,.18), transparent 30%), var(--paper-light); }
  .nav { height: 64px; }
  .hero__content { min-height: auto; grid-template-columns: 1fr; gap: 65px; padding: 65px 0 90px; }
  h1 { font-size: clamp(44px, 13vw, 58px); }
  .hero__lead { margin-top: 24px; font-size: 16px; }
  .hero__actions { align-items: stretch; flex-direction: column; gap: 12px; }
  .cta--quiet { align-self: center; }
  .trust { align-items: flex-start; flex-direction: column; gap: 8px; }
  .hero__visual { width: calc(100% - 24px); }
  .floating-skill { left: -13px; bottom: 72px; }
  .seal { right: -10px; }
  .rewards, .steps { padding: 86px 20px; }
  .section-heading { display: block; margin-bottom: 42px; }
  .section-heading .eyebrow { margin-bottom: 18px; }
  .reward-grid { grid-template-columns: 1fr 1fr; }
  .reward-grid article { min-height: 225px; padding: 20px; }
  .reward-grid article:nth-child(2) { border-right: 0; }
  .reward-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .reward-grid h3 { margin-top: 45px; }
  .duel { min-height: auto; grid-template-columns: 1fr; gap: 36px; padding: 85px 20px; }
  .duel__center { grid-row: 1; }
  .duel__center h2 { font-size: clamp(29px, 8.2vw, 32px); }
  .duel__card { min-height: 180px; }
  .duel__card--left, .duel__card--right { transform: none; }
  .steps ol { grid-template-columns: 1fr; gap: 48px; }
  .steps li strong { margin-top: 24px; }
  .final-cta { padding: 90px 20px; }
  .final-cta .cta { width: 100%; max-width: 360px; }
  .final-cta__mark { font-size: 290px; }
  footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cta { transition: none; }
}