:root {
  --ink: #17212a;
  --ink-soft: #4d5861;
  --navy: #17354d;
  --navy-deep: #0a2234;
  --silver-mist: #e1e7e9;
  --stone: #d8d1c5;
  --red: #b5222c;
  --gold: #c7a45d;
  --ivory: #f5f0e6;
  --paper: #fffdf8;
  --line: rgba(23, 53, 77, .18);
  --serif: Georgia, "Times New Roman", "Noto Serif SC", serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); }
img { display: block; max-width: 100%; }
a { color: inherit; }
.skip-link { position: absolute; z-index: 100; left: 1rem; top: 0; padding: .7rem 1rem; color: var(--navy); background: white; transform: translateY(-140%); }
.skip-link:focus { top: 1rem; transform: none; }
.rcm-prototype { overflow: hidden; }

.site-header {
  position: relative;
  z-index: 20;
  height: 76px;
  padding: 0 clamp(1.2rem, 4vw, 4.5rem);
  display: grid;
  grid-template-columns: minmax(250px, 1fr) auto minmax(250px, 1fr);
  align-items: center;
  gap: 2rem;
  background: rgba(255, 253, 248, .97);
  border-bottom: 1px solid rgba(10, 34, 52, .14);
}
.brand { display: inline-flex; align-items: center; gap: .72rem; width: fit-content; font-family: var(--serif); font-size: 1.08rem; font-weight: 700; text-decoration: none; letter-spacing: .01em; }
.brand small { display: block; margin-top: .12rem; color: #738079; font-family: var(--sans); font-size: .57rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; color: white; background: var(--navy); border: 1px solid rgba(255,255,255,.4); border-radius: 50%; font-size: 1rem; box-shadow: 0 0 0 3px var(--navy); }
.primary-nav { display: flex; align-items: center; gap: clamp(1.1rem, 2.4vw, 2.8rem); height: 100%; }
.primary-nav a { position: relative; display: flex; align-items: center; height: 100%; color: #39443f; font-size: .72rem; font-weight: 750; letter-spacing: .08em; text-decoration: none; text-transform: uppercase; }
.primary-nav a:nth-child(2)::after { position: absolute; bottom: 0; left: 0; right: 0; height: 3px; content: ""; background: var(--red); }
.header-tools { justify-self: end; display: flex; align-items: center; gap: 1rem; }
.prototype-flag { padding: .36rem .55rem; color: #7a1720; background: #f6e4e4; border: 1px solid #e5b8bc; font-size: .57rem; font-weight: 800; letter-spacing: .08em; }
.language-link { display: grid; place-items: center; min-width: 42px; height: 34px; border: 1px solid var(--line); color: var(--navy); font-size: .72rem; font-weight: 800; text-decoration: none; }

.mint-hero { position: relative; min-height: 700px; color: white; background: var(--navy-deep); }
.hero-photo, .hero-photo picture, .hero-photo img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-photo img { object-fit: cover; object-position: 50% 24%; filter: saturate(.96) contrast(1.02) brightness(1.02); }
.hero-wash {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5,22,36,.94) 0%, rgba(6,25,41,.84) 27%, rgba(8,31,49,.52) 43%, rgba(8,31,49,.14) 61%, rgba(8,31,49,.04) 100%),
    linear-gradient(0deg, rgba(5,21,34,.64) 0%, rgba(5,21,34,.18) 29%, transparent 48%);
}
.hero-inner { position: relative; width: min(1420px, 100%); min-height: 700px; margin: auto; padding: 2rem clamp(2rem, 5.3vw, 5.5rem) 7.2rem; display: grid; grid-template-columns: minmax(360px, .9fr) minmax(470px, 1.1fr); grid-template-rows: auto 1fr auto; column-gap: clamp(2rem, 5vw, 6rem); }
.breadcrumb { grid-column: 1 / -1; display: flex; align-items: center; gap: .65rem; align-self: start; color: rgba(255,255,255,.69); font-size: .66rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.breadcrumb a { text-underline-offset: .22rem; }
.hero-copy { align-self: center; padding: 2.5rem 0 4rem; }
.eyebrow, .section-kicker { margin: 0 0 1rem; color: var(--gold); font-size: .68rem; font-weight: 850; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow { display: flex; align-items: center; gap: .65rem; }
.eyebrow span, .section-kicker span { display: inline-block; width: 24px; height: 1px; margin-right: .35rem; vertical-align: middle; background: currentColor; }
.hero-copy h1 { max-width: 650px; margin: 0; font-family: var(--serif); font-size: clamp(3.6rem, 6vw, 6.4rem); font-weight: 400; line-height: .86; letter-spacing: -.055em; text-wrap: balance; }
.country { margin: 1.15rem 0 0; font-family: var(--serif); font-size: 1.35rem; font-style: italic; color: #d6bf8c; }
.hero-intro { max-width: 590px; margin: 1.6rem 0 2rem; color: rgba(255,255,255,.8); font-family: var(--serif); font-size: 1.12rem; line-height: 1.65; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.button { display: inline-flex; justify-content: space-between; align-items: center; gap: 1.5rem; min-height: 48px; padding: 0 1.2rem; border: 1px solid rgba(255,255,255,.48); font-size: .63rem; font-weight: 850; letter-spacing: .11em; text-decoration: none; }
.button.primary { color: var(--navy-deep); background: #f8f1e3; border-color: #f8f1e3; }
.button.secondary { color: white; background: rgba(8,31,49,.24); }
.button:hover, .button:focus-visible { outline: 2px solid white; outline-offset: 3px; }

.coin-stage { position: relative; align-self: center; height: 430px; margin: 0; isolation: isolate; }
.coin { position: absolute; border-radius: 50%; filter: drop-shadow(0 22px 24px rgba(0,0,0,.38)); }
.coin picture, .coin img { width: 100%; height: 100%; }
.coin img { border-radius: 50%; object-fit: contain; }
.coin span { position: absolute; left: 50%; bottom: -1.6rem; padding: .28rem .55rem; white-space: nowrap; color: rgba(255,255,255,.78); background: rgba(5,24,39,.72); font-size: .58rem; font-weight: 700; letter-spacing: .08em; transform: translateX(-50%); text-transform: uppercase; }
.coin-reverse { z-index: 2; width: 390px; height: 390px; left: 4%; top: 0; }
.coin-obverse { z-index: 1; width: 268px; height: 268px; right: 1%; bottom: 0; }
.coin-reverse::before { position: absolute; z-index: -1; inset: -26px; content: ""; border: 1px solid rgba(225,202,145,.34); border-radius: 50%; }
.hero-facts { grid-column: 1 / -1; align-self: end; display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; border-top: 1px solid rgba(255,255,255,.24); }
.hero-facts div { padding: 1rem 1.25rem 0; border-left: 1px solid rgba(255,255,255,.18); }
.hero-facts div:first-child { padding-left: 0; border-left: 0; }
.hero-facts dt { display: flex; align-items: baseline; gap: .7rem; color: rgba(255,255,255,.62); font-size: .58rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.hero-facts dt strong { color: #e4ca91; font-family: var(--serif); font-size: 1rem; font-weight: 400; text-transform: none; }
.hero-facts dd { margin: .35rem 0 0; font-family: var(--serif); font-size: .9rem; }
.image-meta { position: absolute; right: 1.2rem; bottom: .65rem; margin: 0; color: rgba(255,255,255,.58); font-size: .54rem; letter-spacing: .02em; }

.trust-ribbon { display: grid; grid-template-columns: repeat(4, 1fr); padding: 0 clamp(2rem, 5vw, 5rem); color: white; background: var(--navy-deep); }
.trust-ribbon article { min-height: 128px; padding: 1.5rem clamp(1rem, 2.1vw, 2rem); display: flex; align-items: center; gap: 1rem; border-left: 1px solid rgba(255,255,255,.12); }
.trust-ribbon article:first-child { border-left: 0; }
.trust-ribbon article > strong { min-width: 44px; color: #d8bc7d; font-family: var(--serif); font-size: 1.25rem; font-weight: 400; }
.trust-ribbon h2 { margin: 0 0 .35rem; font-family: var(--serif); font-size: .92rem; font-weight: 400; }
.trust-ribbon p { margin: 0; color: rgba(255,255,255,.56); font-size: .65rem; line-height: 1.45; }

.discovery { display: grid; grid-template-columns: minmax(280px, .78fr) minmax(0, 2.25fr); background: var(--ivory); }
.about-panel { padding: clamp(4rem, 8vw, 8rem) clamp(2rem, 5.5vw, 6rem); border-right: 1px solid var(--line); }
.section-kicker { color: #8e702f; line-height: 1.55; }
.about-panel h2 { margin: 0 0 2rem; color: var(--navy); font-family: var(--serif); font-size: clamp(2.5rem, 4vw, 4.3rem); font-weight: 400; line-height: .98; letter-spacing: -.04em; }
.about-panel > p:not(.section-kicker) { color: var(--ink-soft); font-family: var(--serif); font-size: 1rem; line-height: 1.75; }
.about-panel > a { display: inline-flex; gap: 1rem; margin-top: 1rem; color: var(--navy); font-size: .67rem; font-weight: 850; letter-spacing: .08em; text-underline-offset: .3rem; text-transform: uppercase; }
.series-panel { padding: clamp(4rem, 7vw, 7rem) clamp(2rem, 4.5vw, 5rem); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 2rem; margin-bottom: 2rem; }
.section-heading h2, .timeline-section > header h2 { max-width: 720px; margin: 0; color: var(--navy); font-family: var(--serif); font-size: clamp(2rem, 3.3vw, 3.5rem); font-weight: 400; line-height: 1.02; letter-spacing: -.035em; }
.section-heading > span { max-width: 210px; color: #7d817e; font-size: .59rem; line-height: 1.4; text-align: right; text-transform: uppercase; }
.series-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.series-card { position: relative; min-width: 0; padding: 1.6rem; display: grid; grid-template-columns: minmax(120px, .78fr) 1fr; gap: 1.4rem; color: inherit; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.32); text-decoration: none; transition: background-color .18s ease, box-shadow .18s ease; }
.series-card:visited { color: inherit; }
.series-card:hover { background: rgba(255,255,255,.5); box-shadow: inset 0 0 0 1px rgba(142,112,47,.22); }
.series-card:focus-visible { z-index: 1; outline: 2px solid #8e702f; outline-offset: -4px; background: rgba(255,255,255,.5); box-shadow: inset 0 0 0 1px rgba(142,112,47,.22); }
.series-image { position: relative; align-self: center; aspect-ratio: 1; }
.series-image picture, .series-image img { width: 100%; height: 100%; }
.series-image img { aspect-ratio: 1 / 1; object-fit: contain; filter: drop-shadow(0 10px 9px rgba(23,35,47,.17)); }
.series-number { position: absolute; left: -.55rem; top: -.55rem; color: rgba(23,53,77,.25); font-family: var(--serif); font-size: .86rem; }
.series-copy { display: flex; min-width: 0; flex-direction: column; justify-content: center; }
.series-copy > p { margin: 0 0 .4rem; color: #987630; font-size: .61rem; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.series-copy h3 { margin: 0; color: var(--navy); font-family: var(--serif); font-size: clamp(1.3rem, 2vw, 2rem); font-weight: 400; line-height: 1.02; }
.card-rule { width: 30px; height: 1px; margin: .75rem 0; background: #baa468; }
.series-copy > span { color: #66706b; font-family: var(--serif); font-size: .78rem; line-height: 1.45; }
.series-cta { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1rem; color: var(--navy); font-family: var(--sans); font-size: .56rem; font-weight: 850; letter-spacing: .07em; text-transform: uppercase; }
.series-cta b { transition: transform .18s ease; }
.series-card:hover .series-cta b, .series-card:focus-visible .series-cta b { transform: translateX(3px); }

.timeline-section { padding: clamp(4rem, 8vw, 8rem) clamp(2rem, 6vw, 6.5rem); background: white; }
.timeline-section > header { display: flex; justify-content: space-between; align-items: end; gap: 2rem; margin-bottom: 3.5rem; }
.timeline-section > header .section-kicker { max-width: 260px; }
.timeline { display: grid; grid-template-columns: repeat(6, 1fr); margin: 0; padding: 0; list-style: none; }
.timeline li { position: relative; padding: 0 1.2rem 0 0; }
.timeline li::before { position: absolute; left: 0; right: 0; top: 44px; height: 1px; content: ""; background: var(--line); }
.timeline time { color: var(--navy); font-family: var(--serif); font-size: 1.45rem; }
.timeline-dot { position: relative; z-index: 1; display: block; width: 9px; height: 9px; margin: .8rem 0 1.2rem; background: var(--red); border: 3px solid white; border-radius: 50%; box-shadow: 0 0 0 1px var(--red); }
.timeline h3 { margin: 0 0 .5rem; color: var(--navy); font-family: var(--serif); font-size: .98rem; font-weight: 400; }
.timeline p { margin: 0; color: #69736e; font-size: .68rem; line-height: 1.55; }

.sml-preview { display: grid; grid-template-columns: minmax(380px, 1fr) minmax(440px, 1.12fr); min-height: 650px; color: white; background: var(--navy-deep); }
.sml-art { position: relative; display: grid; place-items: center; overflow: hidden; background: radial-gradient(circle at 50% 44%, #fffdf8 0%, #eef1f1 55%, #d2dadd 100%); }
.sml-art picture { position: relative; z-index: 2; width: min(72%, 500px); aspect-ratio: 1 / 1; filter: drop-shadow(0 22px 22px rgba(10,34,52,.24)); }
.sml-art img { width: 100%; height: auto; aspect-ratio: 1 / 1; object-fit: contain; border-radius: 50%; }
.maple-watermark { position: absolute; inset: auto; color: rgba(23,53,77,.035); font-size: 31rem; transform: rotate(-8deg); filter: grayscale(1); }
.sml-content { padding: clamp(4rem, 8vw, 8rem) clamp(2.5rem, 7vw, 7rem); align-self: center; }
.sml-content .section-kicker { color: #dbc383; }
.sml-content h2 { margin: 0; font-family: var(--serif); font-size: clamp(3rem, 5vw, 5.5rem); font-weight: 400; letter-spacing: -.05em; }
.sml-intro { max-width: 650px; color: rgba(255,255,255,.72); font-family: var(--serif); font-size: 1rem; line-height: 1.65; }
.specs { display: grid; grid-template-columns: repeat(5, 1fr); margin: 2rem 0; padding: 1.3rem 0; border-top: 1px solid rgba(255,255,255,.19); border-bottom: 1px solid rgba(255,255,255,.19); }
.specs div { padding-left: .9rem; border-left: 1px solid rgba(255,255,255,.16); }
.specs div:first-child { padding-left: 0; border-left: 0; }
.specs dt { color: rgba(255,255,255,.48); font-size: .56rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.specs dd { margin: .35rem 0 0; font-family: var(--serif); font-size: .88rem; }
.sml-content h3 { margin: 0 0 .65rem; font-family: var(--serif); font-size: 1.55rem; font-weight: 400; }
.sml-content h3 + p { color: rgba(255,255,255,.66); font-size: .78rem; line-height: 1.65; }
.boundary { margin-top: 1.6rem; padding: .9rem 1rem; color: rgba(255,255,255,.61); background: rgba(0,0,0,.13); border-left: 2px solid #d4b76f; font-size: .65rem; line-height: 1.55; }
.boundary strong { display: block; margin-bottom: .3rem; color: #e6d4a6; font-size: .57rem; letter-spacing: .08em; text-transform: uppercase; }

.evidence-note { padding: 1.5rem clamp(2rem, 6vw, 6rem); display: flex; justify-content: space-between; align-items: center; gap: 2rem; color: #31424f; background: #e8edef; border-bottom: 1px solid #cbd5d9; }
.evidence-note > div { display: flex; align-items: center; gap: 1rem; }
.evidence-note > div > span { display: grid; place-items: center; width: 30px; height: 30px; flex: 0 0 auto; color: white; background: var(--navy); border-radius: 50%; font-family: var(--serif); }
.evidence-note h2 { margin: 0 0 .2rem; font-family: var(--serif); font-size: 1rem; font-weight: 400; }
.evidence-note p { max-width: 920px; margin: 0; color: #61717c; font-size: .68rem; line-height: 1.5; }
.evidence-note > a { white-space: nowrap; color: var(--navy); font-size: .62rem; font-weight: 800; text-transform: uppercase; }
.site-footer { min-height: 135px; padding: 2.4rem clamp(2rem, 5vw, 5rem); display: flex; justify-content: space-between; align-items: center; color: rgba(255,255,255,.72); background: #071b2a; }
.footer-brand { color: white; }
.site-footer p { font-size: .58rem; letter-spacing: .08em; text-transform: uppercase; }

@media (max-width: 1180px) {
  .site-header { grid-template-columns: 1fr auto; }
  .primary-nav { display: none; }
  .hero-inner { grid-template-columns: minmax(330px, .9fr) minmax(400px, 1fr); }
  .coin-reverse { width: 340px; height: 340px; }
  .coin-obverse { width: 225px; height: 225px; }
  .trust-ribbon { grid-template-columns: repeat(2, 1fr); }
  .trust-ribbon article:nth-child(3) { border-left: 0; border-top: 1px solid rgba(255,255,255,.12); }
  .trust-ribbon article:nth-child(4) { border-top: 1px solid rgba(255,255,255,.12); }
  .discovery { grid-template-columns: 1fr; }
  .about-panel { display: grid; grid-template-columns: .75fr 1fr; column-gap: 3rem; border-right: 0; border-bottom: 1px solid var(--line); }
  .about-panel .section-kicker { grid-column: 1 / -1; }
  .about-panel > a { grid-column: 2; }
  .timeline { grid-template-columns: repeat(3, 1fr); row-gap: 3rem; }
  .sml-preview { grid-template-columns: .8fr 1.2fr; }
  .specs { grid-template-columns: repeat(3, 1fr); row-gap: 1rem; }
}

@media (max-width: 800px) {
  .site-header { height: 66px; padding: 0 1.2rem; }
  .brand { font-size: .9rem; }
  .brand small, .prototype-flag { display: none; }
  .mint-hero { min-height: 920px; }
  .hero-photo img { object-position: 50% 46%; }
  .hero-wash {
    background:
      linear-gradient(180deg, rgba(5,22,36,.88) 0%, rgba(5,22,36,.72) 42%, rgba(5,22,36,.22) 64%, rgba(5,22,36,.58) 100%),
      linear-gradient(90deg, rgba(5,22,36,.48) 0%, rgba(5,22,36,.08) 72%, transparent 100%);
  }
  .hero-inner { min-height: 920px; padding: 1.5rem 1.3rem 5.7rem; grid-template-columns: 1fr; grid-template-rows: auto auto 310px auto; }
  .breadcrumb { font-size: .57rem; }
  .hero-copy { padding: 2.3rem 0 1.3rem; }
  .hero-copy h1 { max-width: 520px; font-size: clamp(3rem, 12vw, 5rem); }
  .hero-intro { max-width: 580px; margin: 1rem 0 1.4rem; font-size: .95rem; }
  .coin-stage { height: 300px; }
  .coin-reverse { width: 275px; height: 275px; left: 4%; }
  .coin-obverse { width: 180px; height: 180px; right: 4%; }
  .hero-facts { grid-template-columns: repeat(2, 1fr); }
  .hero-facts div { padding: .8rem .6rem; border-bottom: 1px solid rgba(255,255,255,.13); }
  .hero-facts div:nth-child(3) { padding-left: 0; border-left: 0; }
  .image-meta { max-width: calc(100% - 2rem); font-size: .48rem; text-align: right; }
  .trust-ribbon { grid-template-columns: 1fr; padding: 0 1.2rem; }
  .trust-ribbon article { min-height: 105px; padding: 1.2rem 0; border-left: 0; border-top: 1px solid rgba(255,255,255,.12); }
  .about-panel { display: block; padding: 4rem 1.5rem; }
  .series-panel { padding: 4rem 1.2rem; }
  .section-heading { display: block; }
  .section-heading > span { display: block; margin-top: 1rem; text-align: left; }
  .series-grid { grid-template-columns: 1fr; }
  .series-card { padding: 1.2rem; grid-template-columns: minmax(130px, .72fr) 1fr; }
  .timeline-section { padding: 4rem 1.4rem; }
  .timeline-section > header { display: block; }
  .timeline-section > header h2 { margin-top: 1rem; }
  .timeline { grid-template-columns: repeat(2, 1fr); row-gap: 3rem; }
  .sml-preview { grid-template-columns: 1fr; }
  .sml-art { min-height: 430px; }
  .sml-content { padding: 4rem 1.5rem; }
  .evidence-note, .site-footer { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 480px) {
  .site-header { height: 62px; }
  .brand-mark { width: 29px; height: 29px; }
  .header-tools { gap: .5rem; }
  .language-link { min-width: 36px; height: 30px; }
  .mint-hero { min-height: 870px; }
  .hero-inner { min-height: 870px; grid-template-rows: auto auto 245px auto; padding: 1.15rem 1rem 5.2rem; }
  .eyebrow { font-size: .56rem; }
  .hero-copy { padding: 1.8rem 0 .8rem; }
  .hero-copy h1 { font-size: 3.35rem; }
  [data-locale="zh-CN"] .hero-copy h1 { font-size: 2.8rem; line-height: .98; }
  .country { margin-top: .7rem; font-size: 1.08rem; }
  .hero-intro { font-size: .85rem; line-height: 1.55; }
  .hero-actions { gap: .55rem; }
  .button { width: 100%; min-height: 42px; }
  .coin-stage { height: 240px; }
  .coin-reverse { width: 215px; height: 215px; left: 2%; }
  .coin-obverse { width: 142px; height: 142px; right: 1%; }
  .coin span { bottom: -1.25rem; font-size: .48rem; }
  .hero-facts dt { font-size: .48rem; }
  .hero-facts dd { font-size: .72rem; }
  .series-card { grid-template-columns: 112px 1fr; gap: .9rem; }
  .series-copy > span { font-size: .69rem; }
  .timeline { grid-template-columns: 1fr; row-gap: 2rem; }
  .timeline li::before { width: 1px; height: calc(100% + 2rem); left: 4px; top: 43px; }
  .timeline li { padding-left: 1.4rem; }
  .timeline-dot { position: absolute; left: 0; top: 28px; }
  .sml-art { min-height: 340px; }
  .specs { grid-template-columns: repeat(2, 1fr); }
  .site-footer p { line-height: 1.5; }
}

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