:root {
  --paper: #f2f0eb;
  --paper-soft: #faf9f6;
  --ink: #121518;
  --muted: #5f6469;
  --line: #c9c6bf;
  --silver: #d9dce0;
  --violet: #7159a8;
  --teal: #0f5d60;
  --dark: #0d1115;
  --dark-soft: #171c22;
  --max: 1440px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
img { display: block; width: 100%; height: auto; }
a { color: inherit; }
button, input, select, textarea { font: inherit; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 300;
  padding: 12px 18px;
  background: #fff;
  color: #000;
  border: 2px solid #000;
}
.skip-link:focus { top: 16px; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  min-height: 82px;
  padding: 16px clamp(22px, 4vw, 64px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  color: #f7f7f7;
  background: rgba(13,17,21,.92);
  border-bottom: 1px solid rgba(255,255,255,.22);
  transition: background .25s ease, color .25s ease, box-shadow .25s ease;
}
.site-header.is-scrolled {
  background: rgba(242,240,235,.94);
  color: var(--ink);
  border-bottom-color: rgba(18,21,24,.15);
  box-shadow: 0 10px 36px rgba(10,13,16,.08);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; min-height: 48px; text-decoration: none; z-index: 102; }
.brand-mark { width: 45px; height: 45px; flex: 0 0 auto; }
.brand-copy { display: grid; line-height: 1.05; }
.brand-copy strong { font-size: 18px; letter-spacing: .14em; }
.brand-copy small { margin-top: 7px; font-size: 8px; letter-spacing: .18em; opacity: .72; }
.site-nav { display: flex; align-items: center; gap: clamp(20px, 2.8vw, 44px); }
.site-nav a { position: relative; padding: 12px 0; font-size: 13px; letter-spacing: .12em; text-decoration: none; }
.site-nav a::after { content: ""; position: absolute; inset: auto 0 7px; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.site-nav a:hover::after, .site-nav a:focus-visible::after { transform: scaleX(1); }
.menu-toggle { display: none; }

.hero { position: relative; min-height: 100svh; color: #fff; background: var(--dark); overflow: hidden; }
.hero-media { position: absolute; inset: 0; height: 100%; object-fit: cover; object-position: center; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7,10,14,.94) 0%, rgba(8,11,15,.74) 38%, rgba(8,11,15,.08) 72%), linear-gradient(0deg, rgba(8,11,15,.78), transparent 35%); }
.hero-copy { position: absolute; z-index: 2; left: clamp(24px, 8vw, 126px); top: 50%; width: min(700px, 58vw); transform: translateY(-48%); }
.eyebrow, .section-code { margin: 0 0 28px; font-size: 11px; letter-spacing: .26em; text-transform: uppercase; }
.eyebrow { color: #cfd4d6; }
.hero h1, h2, h3 { margin: 0; font-family: "Songti SC", SimSun, serif; font-weight: 500; }
.hero h1 { font-size: clamp(54px, 7.6vw, 118px); line-height: 1.02; letter-spacing: -.055em; }
.hero h1 em { color: #d9c7ff; font-style: normal; }
.hero-lede { max-width: 590px; margin: 34px 0 30px; color: #d7d9db; font-size: clamp(16px, 1.3vw, 20px); line-height: 1.95; }
.line-link, .ink-link { display: inline-flex; align-items: center; gap: 36px; min-height: 48px; font-size: 13px; letter-spacing: .16em; text-decoration: none; border-bottom: 1px solid currentColor; }
.hero-register { position: absolute; z-index: 2; right: clamp(26px, 4vw, 66px); top: 36%; width: 230px; display: grid; grid-template-columns: 40px 1fr; gap: 12px 16px; align-items: center; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.4); }
.hero-register span { color: #aa97d5; font-family: Consolas, monospace; font-size: 11px; }
.hero-register strong { font-size: 12px; font-weight: 500; letter-spacing: .08em; }
.hero-axis { position: absolute; z-index: 2; inset: auto clamp(24px, 5vw, 78px) 26px; display: flex; align-items: center; gap: 20px; color: rgba(255,255,255,.68); font-family: Consolas, monospace; font-size: 9px; letter-spacing: .2em; }
.hero-axis i { flex: 1; height: 1px; background: rgba(255,255,255,.25); }

.section-intro, .path-heading, .standards-heading {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(100px, 12vw, 180px) clamp(24px, 7vw, 110px) clamp(70px, 8vw, 120px);
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr) minmax(250px, 370px);
  gap: clamp(26px, 5vw, 86px);
  align-items: start;
}
.section-code { color: var(--teal); font-family: Consolas, monospace; }
.section-code--dark { color: #72ced0; }
.section-intro h2, .path-heading h2, .standards-heading h2, .interface h2, .pilot h2, .green h2, .contact h2 { font-size: clamp(42px, 5.8vw, 88px); line-height: 1.12; letter-spacing: -.05em; }
.section-intro > p:last-child, .path-heading > p:last-child { margin: 8px 0 0; color: var(--muted); font-size: 15px; }

.specimen { min-height: 720px; display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(380px, .75fr); }
.specimen figure { position: relative; margin: 0; min-height: 620px; overflow: hidden; }
.specimen figure img { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.specimen figcaption { position: absolute; inset: auto 28px 24px; display: flex; justify-content: space-between; gap: 20px; padding: 12px 14px; color: #fff; background: rgba(10,13,16,.82); font-size: 12px; letter-spacing: .16em; border-top: 1px solid rgba(255,255,255,.65); text-shadow: 0 1px 12px rgba(0,0,0,.6); }
.specimen-copy { padding: clamp(70px, 8vw, 130px) clamp(28px, 7vw, 110px); display: flex; flex-direction: column; justify-content: center; }
.chapter-label { margin: 0 0 24px; color: var(--teal); font-family: Consolas, monospace; font-size: 10px; letter-spacing: .22em; }
.specimen h3 { font-size: clamp(48px, 6vw, 92px); line-height: 1.05; letter-spacing: -.055em; }
.specimen-copy > p:not(.chapter-label) { max-width: 470px; margin: 34px 0; color: var(--muted); }
.assay-list { margin: 18px 0 0; border-top: 1px solid var(--line); }
.assay-list div { display: grid; grid-template-columns: 110px 1fr; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.assay-list dt { color: var(--teal); font-size: 11px; letter-spacing: .12em; }
.assay-list dd { margin: 0; font-size: 13px; }
.specimen--crystal { grid-template-columns: minmax(380px, .75fr) minmax(0, 1.45fr); background: var(--dark); color: #fff; }
.specimen--crystal .specimen-copy > p:not(.chapter-label) { color: #b8bec3; }
.specimen--crystal .chapter-label { color: #72ced0; }
.specimen--crystal figure img { object-position: center; }

.path { background: var(--dark-soft); color: #fff; }
.path-heading { border-bottom: 1px solid rgba(255,255,255,.17); }
.path-heading > p:last-child { color: #b6bcc0; }
.path-figure { max-width: var(--max); min-height: 660px; margin: 0 auto; overflow: hidden; }
.path-figure img { height: 100%; min-height: 660px; object-fit: cover; }
.path-rail { max-width: var(--max); margin: 0 auto; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); list-style: none; border-top: 1px solid rgba(255,255,255,.2); }
.path-rail li { min-height: 210px; padding: 28px clamp(18px, 2vw, 32px); border-right: 1px solid rgba(255,255,255,.16); }
.path-rail li:last-child { border-right: 0; }
.path-rail span { color: #72ced0; font-family: Consolas, monospace; font-size: 11px; }
.path-rail strong { display: block; margin-top: 46px; font-family: "Songti SC", SimSun, serif; font-size: 23px; font-weight: 500; }
.path-rail p { margin: 10px 0 0; color: #aeb4b9; font-size: 12px; }

.interface { min-height: 760px; display: grid; grid-template-columns: 1.15fr .85fr; background: var(--paper-soft); }
.interface-image { min-height: 700px; overflow: hidden; }
.interface-image img { height: 100%; object-fit: cover; }
.interface-copy { padding: clamp(80px, 10vw, 160px) clamp(28px, 7vw, 110px); display: flex; flex-direction: column; justify-content: center; }
.interface-copy .lead { margin: 36px 0 12px; color: var(--ink); font-family: "Songti SC", SimSun, serif; font-size: clamp(21px, 2vw, 29px); line-height: 1.6; }
.interface-copy > p:not(.section-code):not(.lead) { color: var(--muted); }
.interface-copy .ink-link { margin-top: 24px; align-self: flex-start; }

.standards { background: var(--paper); }
.standards-heading { grid-template-columns: 190px 1fr; }
.standards-body { max-width: var(--max); margin: 0 auto; padding: 0 clamp(24px, 7vw, 110px) clamp(110px, 12vw, 180px); display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(40px, 8vw, 130px); }
.standards-body figure { margin: 0; align-self: start; }
.standards-body figure img { aspect-ratio: 3 / 4; object-fit: cover; }
.standards-body figcaption { padding: 14px 0; color: var(--muted); font-size: 11px; letter-spacing: .12em; border-bottom: 1px solid var(--line); }
.evidence-timeline { margin: 0; padding: 0; list-style: none; }
.evidence-timeline li { display: grid; grid-template-columns: 78px 1fr; gap: 28px; padding: 26px 0 34px; border-top: 1px solid var(--line); }
.evidence-timeline time { color: var(--violet); font-family: Consolas, monospace; font-size: 15px; }
.evidence-timeline strong { font-family: "Songti SC", SimSun, serif; font-size: 25px; font-weight: 500; }
.evidence-timeline p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }

.pilot { position: relative; min-height: 820px; color: #fff; background: var(--dark); overflow: hidden; }
.pilot-media { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.pilot-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7,10,14,.94) 0%, rgba(7,10,14,.75) 40%, rgba(7,10,14,.05) 75%), linear-gradient(0deg, rgba(7,10,14,.55), transparent 45%); }
.pilot-copy { position: relative; z-index: 2; width: min(680px, 75vw); padding: clamp(120px, 15vw, 220px) 0 clamp(110px, 13vw, 190px); margin-left: clamp(24px, 8vw, 126px); }
.pilot-copy > p:not(.section-code) { max-width: 560px; margin: 36px 0; color: #d1d5d8; }
.status-line { display: inline-block; padding-top: 16px; color: #8ed8d9; border-top: 1px solid rgba(142,216,217,.65); font-family: Consolas, monospace; font-size: 10px; letter-spacing: .12em; }

.green { display: grid; grid-template-columns: .7fr 1.3fr; background: var(--paper-soft); }
.green-copy { padding: clamp(90px, 11vw, 170px) clamp(28px, 7vw, 105px); display: flex; flex-direction: column; justify-content: center; }
.green-copy > p:not(.section-code) { margin: 36px 0; color: var(--muted); }
.green-stamp { align-self: flex-start; padding: 13px 18px; border: 1px solid var(--teal); color: var(--teal); font-family: Consolas, monospace; font-size: 11px; letter-spacing: .18em; }
.green figure { min-height: 760px; margin: 0; overflow: hidden; }
.green figure img { height: 100%; object-fit: cover; }

.contact { display: grid; grid-template-columns: 1fr 1fr; background: #e5e2dc; }
.contact-intro, .inquiry-form { padding: clamp(90px, 10vw, 160px) clamp(28px, 7vw, 105px); }
.contact-intro { border-right: 1px solid var(--line); }
.contact-intro > p:not(.section-code) { max-width: 590px; margin: 36px 0 56px; color: var(--muted); }
.contact dl { margin: 0; border-top: 1px solid var(--line); }
.contact dl div { display: grid; grid-template-columns: 80px 1fr; gap: 24px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.contact dt { color: var(--teal); font-size: 11px; letter-spacing: .12em; }
.contact dd { margin: 0; font-size: 13px; }
.inquiry-form { display: flex; flex-direction: column; justify-content: center; gap: 24px; background: var(--paper-soft); }
.field-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.inquiry-form label { display: grid; gap: 9px; color: var(--muted); font-size: 12px; letter-spacing: .1em; }
.inquiry-form input, .inquiry-form select, .inquiry-form textarea { width: 100%; min-height: 48px; padding: 12px 2px; color: var(--ink); background: transparent; border: 0; border-bottom: 1px solid #8f8d87; border-radius: 0; outline: 0; }
.inquiry-form textarea { resize: vertical; }
.inquiry-form input:focus, .inquiry-form select:focus, .inquiry-form textarea:focus { border-bottom-color: var(--teal); box-shadow: 0 2px 0 var(--teal); }
.inquiry-form button { align-self: flex-start; min-height: 50px; padding: 13px 22px; color: #fff; background: var(--ink); border: 1px solid var(--ink); cursor: pointer; letter-spacing: .14em; }
.inquiry-form button:hover { color: var(--ink); background: transparent; }
.form-status { min-height: 29px; margin: 0; color: #6b245b; font-size: 13px; }

.site-footer { min-height: 180px; padding: 42px clamp(24px, 5vw, 76px); display: flex; align-items: center; justify-content: space-between; gap: 38px; color: #e9ecee; background: var(--dark); }
.footer-brand { display: flex; align-items: center; gap: 16px; }
.footer-brand div { display: grid; }
.footer-brand strong { font-family: "Songti SC", SimSun, serif; font-size: 18px; font-weight: 500; }
.footer-brand small { margin-top: 7px; color: #939ba1; font-size: 10px; letter-spacing: .1em; }
.footer-meta { text-align: right; }
.footer-meta p { margin: 0 0 8px; color: #aeb5ba; font-size: 11px; }
.footer-meta a { display: inline-flex; align-items: center; min-height: 44px; font-size: 12px; text-decoration: none; }

[data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity .65s ease, transform .65s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }
:focus-visible { outline: 3px solid #22a8ac; outline-offset: 4px; }

@media (max-width: 1080px) {
  .hero-register { top: auto; bottom: 80px; right: 24px; width: 220px; }
  .section-intro, .path-heading { grid-template-columns: 150px 1fr; }
  .section-intro > p:last-child, .path-heading > p:last-child { grid-column: 2; }
  .specimen { min-height: 640px; grid-template-columns: 1.15fr .85fr; }
  .specimen--crystal { grid-template-columns: .85fr 1.15fr; }
  .path-rail { grid-template-columns: repeat(3, 1fr); }
  .path-rail li:nth-child(3) { border-right: 0; }
  .path-rail li:nth-child(n+4) { border-top: 1px solid rgba(255,255,255,.16); }
  .path-rail li:nth-child(4) { grid-column: 1 / 2; }
  .green { grid-template-columns: .85fr 1.15fr; }
}

@media (max-width: 860px) {
  .site-header { min-height: 72px; padding: 12px 20px; }
  .brand-mark { width: 40px; height: 40px; }
  .brand-copy strong { font-size: 16px; }
  .menu-toggle { position: relative; z-index: 103; display: grid; place-content: center; gap: 7px; width: 48px; height: 48px; color: currentColor; background: transparent; border: 0; cursor: pointer; }
  .menu-toggle span { width: 26px; height: 1px; background: currentColor; transition: transform .2s ease; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .site-nav { position: fixed; inset: 0; z-index: 101; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 12px; padding: 100px 34px 44px; color: #fff; background: rgba(13,17,21,.98); visibility: hidden; opacity: 0; pointer-events: none; transition: opacity .2s ease, visibility .2s ease; }
  .site-nav.is-open { visibility: visible; opacity: 1; pointer-events: auto; }
  .site-nav a { width: 100%; min-height: 54px; font-family: "Songti SC", SimSun, serif; font-size: 28px; border-bottom: 1px solid rgba(255,255,255,.2); }
  .site-header:has(.site-nav.is-open) { color: #fff; background: transparent; border-bottom-color: transparent; box-shadow: none; }
  .hero-copy { left: 24px; top: 45%; width: calc(100% - 48px); transform: translateY(-50%); }
  .hero h1 { font-size: clamp(48px, 13vw, 72px); }
  .hero-register { left: 24px; right: 24px; bottom: 70px; width: auto; grid-template-columns: 36px 1fr; }
  .hero-axis { display: none; }
  .section-intro, .path-heading, .standards-heading { display: block; padding: 92px 24px 64px; }
  .section-intro > p:last-child, .path-heading > p:last-child { max-width: 600px; margin-top: 26px; }
  .specimen, .specimen--crystal { min-height: 0; display: flex; flex-direction: column; }
  .specimen--crystal .specimen-copy { order: 2; }
  .specimen figure { min-height: 58vw; }
  .specimen-copy { padding: 72px 24px 84px; }
  .path-figure, .path-figure img { min-height: 62vw; }
  .path-rail { grid-template-columns: 1fr 1fr; }
  .path-rail li, .path-rail li:nth-child(3) { border-right: 1px solid rgba(255,255,255,.16); border-top: 1px solid rgba(255,255,255,.16); }
  .path-rail li:nth-child(even) { border-right: 0; }
  .path-rail li:nth-child(4) { grid-column: auto; }
  .path-rail li:last-child { grid-column: 1 / -1; }
  .interface { display: flex; flex-direction: column; }
  .interface-image { min-height: 66vw; }
  .interface-copy { padding: 80px 24px 96px; }
  .standards-body { grid-template-columns: 1fr; padding: 0 24px 100px; }
  .standards-body figure img { aspect-ratio: 4 / 3; }
  .pilot { min-height: 760px; }
  .pilot-copy { margin-left: 24px; width: calc(100% - 48px); }
  .green { display: flex; flex-direction: column; }
  .green-copy { padding: 90px 24px; }
  .green figure { min-height: 60vw; }
  .contact { grid-template-columns: 1fr; }
  .contact-intro { border-right: 0; border-bottom: 1px solid var(--line); }
  .contact-intro, .inquiry-form { padding: 90px 24px; }
}

@media (max-width: 520px) {
  .brand-copy small { display: none; }
  .hero { min-height: 790px; }
  .hero-shade { background: linear-gradient(90deg, rgba(7,10,14,.92), rgba(7,10,14,.46)), linear-gradient(0deg, rgba(7,10,14,.82), transparent 50%); }
  .hero-media { object-position: 58% center; }
  .hero-copy { top: 42%; }
  .hero h1 { font-size: 51px; }
  .hero-lede { font-size: 15px; }
  .hero-register { bottom: 32px; }
  .section-intro h2, .path-heading h2, .standards-heading h2, .interface h2, .pilot h2, .green h2, .contact h2 { font-size: 43px; }
  .specimen h3 { font-size: 49px; }
  .specimen figure { min-height: 390px; }
  .specimen figcaption { inset: auto 18px 16px; font-size: 10px; }
  .path-figure, .path-figure img { min-height: 430px; }
  .path-figure img { object-position: 38% center; }
  .path-rail { grid-template-columns: 1fr; }
  .path-rail li, .path-rail li:nth-child(even), .path-rail li:nth-child(3) { min-height: 170px; border-right: 0; }
  .path-rail li:last-child { grid-column: auto; }
  .interface-image { min-height: 430px; }
  .interface-image img { object-position: 58% center; }
  .standards-body figure img { aspect-ratio: 3 / 4; }
  .evidence-timeline li { grid-template-columns: 62px 1fr; gap: 18px; }
  .pilot-media { object-position: 58% center; }
  .green figure { min-height: 430px; }
  .field-pair { grid-template-columns: 1fr; }
  .site-footer { align-items: flex-start; flex-direction: column; }
  .footer-meta { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}