:root {
  --peach: #df6d59;
  --peach-deep: #a8473a;
  --green: #173b35;
  --green-deep: #0b2723;
  --pearl: #fbfaf6;
  --rock: #b7ada3;
  --mist: #e8e3dc;
  --charcoal: #252827;
  --muted: #696f6b;
  --line: rgba(23,59,53,.2);
  --max: 1580px;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body { margin: 0; background: var(--pearl); color: var(--charcoal); font-family: var(--sans); line-height: 1.75; }
img { display: block; max-width: 100%; }
a { color: inherit; }
.skip-link { position: fixed; z-index: 1000; top: 12px; left: 12px; padding: 10px 16px; transform: translateY(-150%); background: var(--green); color: #fff; text-decoration: none; }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--peach); outline-offset: 4px; }

.site-header { position: sticky; z-index: 100; top: 0; border-bottom: 1px solid var(--line); background: rgba(251,250,246,.96); backdrop-filter: blur(14px); }
.header-inner { max-width: var(--max); min-height: 84px; margin: auto; padding: 0 34px; display: flex; align-items: center; }
.brand-lockup { display: flex; align-items: center; gap: 14px; }
.brand-lockup img { width: 47px; height: 47px; object-fit: contain; }
.brand-lockup span { display: grid; line-height: 1.15; }
.brand-lockup strong { color: var(--green); font: 600 24px var(--serif); letter-spacing: .08em; }
.brand-lockup small { margin-top: 6px; color: var(--peach-deep); font-size: 8px; letter-spacing: .2em; }
.primary-nav { margin-left: auto; display: flex; gap: 30px; align-items: center; }
.primary-nav a { position: relative; padding: 29px 0 25px; color: var(--green); font-size: 13px; font-weight: 600; text-decoration: none; }
.primary-nav a::after { content: ""; position: absolute; right: 0; bottom: 18px; left: 0; height: 2px; transform: scaleX(0); transform-origin: left; background: var(--peach); transition: transform .22s ease; }
.primary-nav a:hover::after, .primary-nav a:focus-visible::after, .primary-nav a.is-active::after { transform: scaleX(1); }
.primary-nav a.is-active { color: var(--peach-deep); }
.menu-toggle { display: none; margin-left: auto; border: 0; background: none; color: var(--green); cursor: pointer; }
.menu-toggle span { font-size: 12px; }
.menu-toggle i, .menu-toggle i::before, .menu-toggle i::after { display: block; width: 27px; height: 1px; background: currentColor; }
.menu-toggle i { position: relative; margin: 8px 0 0 auto; }
.menu-toggle i::before, .menu-toggle i::after { content: ""; position: absolute; right: 0; }
.menu-toggle i::before { top: -7px; }
.menu-toggle i::after { top: 7px; }

.mirror-hero { position: relative; max-width: var(--max); min-height: 820px; margin: auto; padding: 64px 42px 0; display: grid; grid-template-columns: 58% 42%; background: var(--pearl); overflow: hidden; }
.hero-copy { position: relative; z-index: 3; align-self: center; padding: 35px 80px 120px 40px; }
.overline, .eyebrow { margin: 0 0 16px; color: var(--peach-deep); font-size: 10px; font-weight: 800; letter-spacing: .23em; }
.official-note { display: inline-block; margin: 0 0 28px; padding: 6px 12px; border: 1px solid var(--green); color: var(--green); font-size: 11px; letter-spacing: .13em; }
.hero-copy h1 { max-width: 790px; margin: 0; color: var(--green); font: 500 clamp(59px,6.2vw,99px)/1.1 var(--serif); letter-spacing: -.055em; }
.hero-lead { max-width: 650px; margin: 32px 0 0; color: var(--peach-deep); font: 400 23px/1.65 var(--serif); }
.hero-abstract { max-width: 700px; margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr; gap: 35px; }
.hero-abstract p { margin: 0; color: var(--muted); font-size: 13px; }
.mirror-composition { position: relative; min-height: 700px; }
.mirror-primary { position: absolute; z-index: 2; top: 0; right: 0; width: 68%; height: 68%; padding: 13px; border: 1px solid var(--green); background: var(--pearl); }
.mirror-primary img { width: 100%; height: 100%; object-fit: cover; }
.mirror-secondary { position: absolute; z-index: 3; right: 45%; bottom: 0; width: 42%; height: 53%; padding: 11px; border: 1px solid var(--peach-deep); background: var(--pearl); }
.mirror-secondary img { width: 100%; height: 100%; object-fit: cover; filter: contrast(.94); }
.mirror-composition::before { content: ""; position: absolute; z-index: 1; top: 9%; right: 11%; width: 70%; height: 72%; background: var(--green); }
.mirror-composition::after { content: ""; position: absolute; right: 0; bottom: 4%; width: 52%; height: 31%; background: var(--peach); }
.mirror-number { position: absolute; z-index: 4; right: 18px; bottom: 11%; display: grid; color: #fff; text-align: right; }
.mirror-number span { font: 500 64px/1 var(--serif); }
.mirror-number b { margin-top: 9px; font-size: 8px; letter-spacing: .2em; }
.hero-register { position: absolute; z-index: 5; right: 42px; bottom: 0; left: 42px; min-height: 64px; display: grid; grid-template-columns: repeat(5,1fr); border-top: 1px solid var(--green); background: var(--pearl); }
.hero-register span { display: grid; place-items: center; border-right: 1px solid var(--line); color: var(--green); font-size: 11px; }
.hero-register span:first-child { border-left: 1px solid var(--line); }

.page-shell { max-width: var(--max); margin: auto; padding: 125px 42px; }
.section-mark { padding-top: 12px; border-top: 1px solid var(--green); display: flex; justify-content: space-between; color: var(--green); }
.section-mark span { font: 500 29px var(--serif); }
.section-mark b { color: var(--peach-deep); font-size: 9px; letter-spacing: .2em; }
.section-mark.light { border-color: rgba(255,255,255,.45); color: #fff; }
.section-mark.light b { color: #ffb2a2; }
.identity-statement { display: grid; grid-template-columns: 110px minmax(300px,.9fr) minmax(420px,1.1fr); gap: 65px; }
.statement-heading h2, .content-range h2, .chronicle h2, .channel-manual h2, .theme-showcase h2, .official-bulletin h2, .usage-support h2, .faq h2, .update-principles h2, .brand-disclosure h2 { margin: 0; color: var(--green); font: 500 clamp(42px,4.6vw,72px)/1.17 var(--serif); letter-spacing: -.045em; }
.statement-copy { padding-top: 28px; border-top: 1px solid var(--line); }
.statement-copy p { margin: 0; color: var(--muted); }
.statement-copy p + p { margin-top: 22px; }

.content-range { background: var(--mist); }
.range-shell { max-width: var(--max); margin: auto; padding: 105px 42px; display: grid; grid-template-columns: .75fr 1.25fr; gap: 95px; }
.content-range header > p:last-child { max-width: 500px; color: var(--muted); }
.range-ledger { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--green); border-left: 1px solid var(--line); }
.range-ledger article { min-height: 210px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.range-ledger span { color: var(--peach-deep); font: 500 20px var(--serif); }
.range-ledger h3 { margin: 34px 0 8px; color: var(--green); font: 500 25px var(--serif); }
.range-ledger p { margin: 0; color: var(--muted); font-size: 13px; }

.chronicle { display: grid; grid-template-columns: 110px .75fr 150px 1.15fr; gap: 52px; }
.chronicle-heading > p:last-child { max-width: 520px; color: var(--muted); }
.chronicle-date { align-self: start; padding: 22px; border: 1px solid var(--green); color: var(--green); text-align: center; }
.chronicle-date time { font: 500 30px/1.2 var(--serif); }
.chronicle-date span { display: block; margin-top: 13px; color: var(--peach-deep); font-size: 9px; letter-spacing: .13em; }
.chronicle-entries { border-top: 1px solid var(--green); }
.chronicle-entries article { padding: 20px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 100px 230px 1fr; gap: 22px; }
.chronicle-entries span { color: var(--peach-deep); font-size: 10px; font-weight: 700; }
.chronicle-entries h3 { margin: 0; color: var(--green); font: 500 20px var(--serif); }
.chronicle-entries p { margin: 0; color: var(--muted); font-size: 13px; }

.channel-manual { background: var(--green-deep); color: #fff; }
.manual-shell { max-width: var(--max); margin: auto; padding: 120px 42px; }
.channel-manual header { display: grid; grid-template-columns: 110px 1fr 1fr; gap: 55px; align-items: end; }
.channel-manual header .section-mark { grid-row: 1 / 4; }
.channel-manual header .eyebrow { grid-column: 2 / 4; color: #ffb2a2; }
.channel-manual h2 { color: #fff; }
.channel-manual header > p:last-child { margin: 0; color: rgba(255,255,255,.58); }
.channel-pages { margin-top: 70px; display: grid; grid-template-columns: repeat(3,1fr); border-top: 1px solid rgba(255,255,255,.35); border-left: 1px solid rgba(255,255,255,.2); }
.channel-pages article { min-height: 280px; padding: 30px; border-right: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); display: flex; flex-direction: column; }
.channel-pages span { color: #ffb2a2; font-size: 10px; letter-spacing: .17em; }
.channel-pages h3 { margin: 55px 0 9px; font: 500 28px var(--serif); }
.channel-pages p { margin: 0; color: rgba(255,255,255,.6); font-size: 13px; }
.channel-pages b { margin-top: auto; padding-top: 25px; color: #f4c6bc; font-size: 10px; font-weight: 500; }

.theme-showcase { background: var(--pearl); }
.showcase-shell { max-width: var(--max); margin: auto; padding: 125px 42px; display: grid; grid-template-columns: .85fr 1.15fr; gap: 90px; align-items: center; }
.showcase-image { position: relative; padding: 30px 0 0 30px; }
.showcase-image::before { content: ""; position: absolute; top: 0; left: 0; width: 68%; height: 68%; background: var(--peach); }
.showcase-image img { position: relative; z-index: 2; width: 100%; aspect-ratio: 1; object-fit: cover; filter: contrast(.94); }
.showcase-copy .section-mark { margin-bottom: 50px; }
.showcase-copy > p:not(.eyebrow) { margin: 25px 0 0; color: var(--muted); }
.showcase-topics { margin-top: 45px; border-top: 1px solid var(--green); }
.showcase-topics article { padding: 20px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 210px 1fr; gap: 25px; }
.showcase-topics h3 { margin: 0; color: var(--green); font: 500 19px var(--serif); }
.showcase-topics p { margin: 0; color: var(--muted); font-size: 13px; }

.official-bulletin { display: grid; grid-template-columns: 110px .75fr 1.25fr; gap: 55px; }
.bulletin-grid { border-top: 1px solid var(--green); }
.bulletin-grid article { min-height: 130px; padding: 23px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 120px 260px 1fr; gap: 25px; align-items: baseline; }
.bulletin-grid time, .bulletin-grid span { color: var(--peach-deep); font-size: 10px; font-weight: 700; }
.bulletin-grid h3 { margin: 0; color: var(--green); font: 500 21px var(--serif); }
.bulletin-grid p { margin: 0; color: var(--muted); font-size: 13px; }

.usage-support { background: var(--peach-deep); color: #fff; }
.support-shell { max-width: var(--max); margin: auto; padding: 120px 42px; display: grid; grid-template-columns: .72fr 1.28fr; gap: 85px; }
.usage-support header .eyebrow { color: #ffd1c7; }
.usage-support h2 { color: #fff; }
.usage-support header > p:last-child { margin-top: 28px; color: rgba(255,255,255,.7); }
.support-columns { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid rgba(255,255,255,.45); border-left: 1px solid rgba(255,255,255,.45); }
.support-columns article { min-height: 270px; padding: 30px; border-right: 1px solid rgba(255,255,255,.45); border-bottom: 1px solid rgba(255,255,255,.45); display: flex; flex-direction: column; }
.support-columns span { color: #ffd5cc; font-size: 10px; letter-spacing: .2em; }
.support-columns h3 { margin: 43px 0 10px; font: 500 24px var(--serif); }
.support-columns p { margin: 0; color: rgba(255,255,255,.7); font-size: 13px; }
.support-columns b { margin-top: auto; padding-top: 22px; font-size: 10px; letter-spacing: .12em; }

.faq { display: grid; grid-template-columns: 110px .65fr 1.35fr; gap: 55px; }
.faq-list { border-top: 1px solid var(--green); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 22px 50px 22px 0; color: var(--green); font: 500 20px var(--serif); cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 7px; font: 400 24px var(--sans); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -4px 50px 24px 0; color: var(--muted); font-size: 14px; }

.update-principles { background: var(--mist); }
.principles-shell { max-width: 1120px; margin: auto; padding: 100px 42px; text-align: center; }
.update-principles h2 { font-size: clamp(40px,4.5vw,67px); }
.principle-copy { margin-top: 38px; padding-top: 28px; border-top: 1px solid var(--green); display: grid; grid-template-columns: 1fr 1fr; gap: 45px; text-align: left; }
.principle-copy p { margin: 0; color: var(--muted); }

.brand-disclosure { background: var(--green); color: #fff; }
.disclosure-shell { max-width: var(--max); margin: auto; padding: 120px 42px; display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; }
.brand-disclosure .eyebrow { color: #ffb9aa; }
.brand-disclosure h2 { color: #fff; }
.disclosure-heading > p:last-child { color: rgba(255,255,255,.58); }
.brand-data { margin: 0; border-top: 1px solid rgba(255,255,255,.35); }
.brand-data div { min-height: 76px; padding: 16px 0; border-bottom: 1px solid rgba(255,255,255,.2); display: grid; grid-template-columns: 150px 1fr; align-items: center; }
.brand-data dt { color: #ffb9aa; font-size: 11px; }
.brand-data dd { margin: 0; font: 500 17px var(--serif); }

.site-footer { background: var(--green-deep); color: #fff; }
.footer-inner { max-width: var(--max); margin: auto; padding: 58px 42px; display: grid; grid-template-columns: 1.2fr 1fr 1.4fr 1fr; gap: 32px; align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand img { width: 53px; height: 53px; object-fit: contain; }
.footer-brand span { display: grid; }
.footer-brand strong { font: 500 22px var(--serif); }
.footer-brand small { color: rgba(255,255,255,.48); font-size: 10px; }
.site-footer p { margin: 0; color: rgba(255,255,255,.58); font-size: 11px; }
.footer-inner > small { grid-column: 1 / 5; padding-top: 21px; border-top: 1px solid rgba(255,255,255,.14); color: rgba(255,255,255,.35); }

@media (max-width: 1200px) {
  .mirror-hero { grid-template-columns: 55% 45%; }
  .hero-copy { padding-right: 45px; }
  .hero-copy h1 { font-size: 68px; }
  .chronicle { grid-template-columns: 90px .75fr 125px 1.15fr; gap: 35px; }
  .chronicle-entries article { grid-template-columns: 90px 200px 1fr; }
}

@media (max-width: 980px) {
  html { scroll-padding-top: 74px; }
  .header-inner { min-height: 74px; padding: 0 24px; }
  .menu-toggle { display: block; }
  .primary-nav { display: none; position: absolute; top: 74px; right: 0; left: 0; padding: 18px 24px 24px; grid-template-columns: 1fr 1fr; gap: 0 30px; background: var(--pearl); border-bottom: 1px solid var(--line); }
  .primary-nav.is-open { display: grid; }
  .primary-nav a { padding: 11px 0; }
  .primary-nav a::after { bottom: 5px; }
  .mirror-hero { min-height: 1190px; padding: 42px 28px 0; grid-template-columns: 1fr; grid-template-rows: auto 580px 64px; }
  .hero-copy { padding: 55px 45px 60px; }
  .mirror-composition { min-height: 560px; }
  .mirror-primary { width: 55%; right: 8%; }
  .mirror-secondary { width: 30%; right: 48%; }
  .mirror-composition::before { width: 60%; right: 16%; }
  .mirror-composition::after { right: 5%; width: 46%; }
  .hero-register { right: 28px; left: 28px; }
  .identity-statement, .chronicle, .official-bulletin, .faq { grid-template-columns: 80px 1fr; gap: 38px; padding: 95px 28px; }
  .statement-copy, .chronicle-heading, .chronicle-date, .chronicle-entries, .bulletin-grid, .faq-list { grid-column: 2; }
  .chronicle-date { width: 150px; }
  .range-shell, .showcase-shell, .support-shell, .disclosure-shell { padding: 90px 28px; grid-template-columns: 1fr; gap: 55px; }
  .channel-manual header { grid-template-columns: 80px 1fr; gap: 38px; }
  .channel-manual header .section-mark { grid-row: 1 / 4; }
  .channel-manual header .eyebrow, .channel-manual header > p:last-child { grid-column: 2; }
  .manual-shell { padding: 95px 28px; }
  .channel-pages { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand, .footer-inner > small { grid-column: 1 / 3; }
}

@media (max-width: 650px) {
  .brand-lockup img { width: 40px; height: 40px; }
  .brand-lockup strong { font-size: 21px; }
  .brand-lockup small { display: none; }
  .primary-nav { grid-template-columns: 1fr; }
  .mirror-hero { min-height: 1050px; padding: 25px 16px 0; grid-template-rows: auto 500px 58px; }
  .hero-copy { padding: 45px 18px 50px; }
  .hero-copy h1 { font-size: 45px; }
  .hero-lead { font-size: 19px; }
  .hero-abstract { grid-template-columns: 1fr; gap: 14px; }
  .mirror-composition { min-height: 480px; }
  .mirror-primary { width: 64%; right: 0; }
  .mirror-secondary { width: 36%; right: 52%; }
  .mirror-composition::before { width: 70%; right: 8%; }
  .mirror-number span { font-size: 45px; }
  .hero-register { right: 16px; left: 16px; grid-template-columns: repeat(3,1fr); }
  .hero-register span:nth-child(-n+2) { display: none; }
  .page-shell, .identity-statement, .chronicle, .official-bulletin, .faq { padding: 76px 18px; grid-template-columns: 1fr; gap: 28px; }
  .statement-copy, .chronicle-heading, .chronicle-date, .chronicle-entries, .bulletin-grid, .faq-list { grid-column: 1; }
  .statement-heading h2, .content-range h2, .chronicle h2, .channel-manual h2, .theme-showcase h2, .official-bulletin h2, .usage-support h2, .faq h2, .update-principles h2, .brand-disclosure h2 { font-size: 39px; }
  .range-shell, .manual-shell, .showcase-shell, .support-shell, .disclosure-shell { padding: 76px 18px; }
  .range-ledger { grid-template-columns: 1fr; }
  .chronicle-entries article, .bulletin-grid article { grid-template-columns: 1fr; gap: 7px; }
  .channel-manual header { grid-template-columns: 1fr; gap: 23px; }
  .channel-manual header .section-mark, .channel-manual header .eyebrow, .channel-manual header > p:last-child { grid-column: 1; grid-row: auto; }
  .channel-pages { grid-template-columns: 1fr; }
  .channel-pages article { min-height: 230px; }
  .showcase-image { padding: 18px 0 0 18px; }
  .showcase-topics article { grid-template-columns: 1fr; gap: 7px; }
  .support-columns { grid-template-columns: 1fr; }
  .support-columns article { min-height: 230px; }
  .principles-shell { padding: 76px 18px; }
  .principle-copy { grid-template-columns: 1fr; gap: 20px; }
  .brand-data div { grid-template-columns: 105px 1fr; }
  .footer-inner { padding: 50px 18px; grid-template-columns: 1fr; gap: 18px; }
  .footer-brand, .footer-inner > small { grid-column: 1; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}