:root {
  --black: #030303;
  --violet: #8B5CF6;
  --cyan: #06B6D4;
  --emerald: #10B981;
  --soft-violet: #a78bfa;
  --white: #ffffff;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--white); background: var(--black); font-family: Inter, "Noto Sans SC", "Microsoft YaHei", sans-serif; line-height: 1.6; }
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; height: 100%; object-fit: cover; }
figure, h1, h2, p, dl, dd { margin: 0; }
em { font-style: normal; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 50; padding: 10px 14px; color: var(--black); background: var(--white); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 20; min-height: 76px; display: flex; align-items: stretch; justify-content: space-between; color: var(--white); background: var(--black); border-bottom: 1px solid var(--violet); }
.brand { display: flex; align-items: center; gap: 13px; padding: 0 32px; font-family: Georgia, "Noto Serif SC", serif; font-size: 16px; font-weight: 700; letter-spacing: -.035em; }
.brand span { width: 24px; height: 24px; border: 1px solid var(--cyan); border-radius: 6px; box-shadow: 5px 5px 0 var(--violet); }
nav { display: flex; align-items: stretch; }
nav a { display: grid; place-items: center; padding: 0 23px; border-left: 1px solid var(--violet); font-family: "Courier New", monospace; font-size: 10px; font-weight: 900; letter-spacing: -.02em; text-transform: uppercase; }
nav a:hover, nav a:focus-visible { color: var(--black); background: var(--cyan); }
nav .nav-cta { color: var(--black); background: var(--emerald); }
.mobile-nav { display: none; }

.hero { min-height: 790px; display: grid; grid-template-columns: 5fr 7fr; background: var(--black); }
.hero-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(58px, 6vw, 94px) clamp(28px, 5vw, 74px); border-right: 1px solid var(--violet); background: linear-gradient(135deg, var(--black), var(--black), var(--violet)); }
h1 { font-family: Georgia, "Noto Serif SC", serif; font-size: clamp(58px, 6.3vw, 94px); line-height: .98; letter-spacing: -.07em; font-weight: 700; }
h1 em { color: var(--cyan); }
.hero-basis { margin-top: 25px; padding-top: 17px; border-top: 1px solid var(--cyan); color: var(--soft-violet); font-family: "Courier New", monospace; font-size: 10px; font-weight: 900; letter-spacing: .05em; text-transform: uppercase; }
.hero-lead { max-width: 510px; margin-top: 14px; font-size: 13px; font-weight: 650; }
.hero-actions { display: flex; align-items: center; gap: 27px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 34px; min-width: 220px; padding: 15px 19px; border: 1px solid var(--cyan); border-radius: 999px; font-family: "Courier New", monospace; font-size: 10px; font-weight: 900; letter-spacing: .03em; text-transform: uppercase; transition: transform .18s ease, background .18s ease; }
.button svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.button:hover, .button:focus-visible { transform: translateY(-4px); }
.button-primary { color: var(--black); background: var(--cyan); box-shadow: 0 0 24px var(--cyan); }
.text-link { padding-bottom: 3px; border-bottom: 1px solid var(--emerald); font-size: 11px; font-weight: 850; }
.hero-media { position: relative; min-height: 790px; overflow: hidden; }

.section-index, .en-label { font-family: "Courier New", monospace; font-size: 10px; font-weight: 900; letter-spacing: .04em; text-transform: uppercase; }
.business { padding: 92px clamp(28px, 5vw, 74px); background: var(--black); }
.section-heading { display: grid; grid-template-columns: 110px 1fr auto; align-items: end; gap: 24px; padding-bottom: 28px; border-bottom: 1px solid var(--cyan); }
.section-heading .en-label { margin-bottom: 10px; color: var(--emerald); }
.heading-note { max-width: 300px; color: var(--soft-violet); font-size: 11px; font-weight: 650; text-align: right; }
h2 { font-family: Georgia, "Noto Serif SC", serif; font-size: clamp(46px, 5vw, 76px); line-height: .98; letter-spacing: -.06em; font-weight: 700; }
.scope-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 36px; border-top: 1px solid var(--violet); border-left: 1px solid var(--violet); }
.scope-grid article { min-height: 176px; display: flex; flex-direction: column; padding: 22px; border-right: 1px solid var(--violet); border-bottom: 1px solid var(--violet); }
.scope-grid article:nth-child(2n) { border-color: var(--cyan); }
.scope-grid article:nth-child(3n) { border-color: var(--emerald); }
.scope-grid span { color: var(--cyan); font-family: "Courier New", monospace; font-size: 10px; font-weight: 900; }
.scope-grid strong { margin-top: auto; font-family: Georgia, "Noto Serif SC", serif; font-size: 19px; line-height: 1.3; }
.scope-grid small { margin-top: 8px; color: var(--white); font-size: 10px; font-weight: 750; }
.media-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 60px; }
.media-pair figure { position: relative; height: 420px; overflow: hidden; border: 1px solid var(--violet); border-radius: 28px; box-shadow: 0 0 26px var(--violet); }

.split-section { min-height: 650px; display: grid; grid-template-columns: 7fr 5fr; padding: 20px; }
.split-section.reverse { grid-template-columns: 5fr 7fr; }
.split-media { position: relative; min-height: 610px; overflow: hidden; border: 1px solid var(--cyan); border-radius: 28px; }
.split-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(48px, 6vw, 88px); }
.split-copy .en-label { margin: 15px 0; color: var(--emerald); }
.split-copy h2 em { color: var(--cyan); }
.split-copy > p:not(.section-index):not(.en-label) { max-width: 560px; margin-top: 26px; font-size: 13px; }
.split-copy dl { margin-top: 32px; border-top: 1px solid currentColor; }
.split-copy dl div { display: grid; grid-template-columns: 140px 1fr; gap: 18px; padding: 14px 0; border-bottom: 1px solid currentColor; }
.split-copy dt { font-family: "Courier New", monospace; font-size: 10px; font-weight: 900; }
.split-copy dd { font-size: 12px; font-weight: 750; }
.cyan-band { color: var(--black); background: var(--cyan); }
.cyan-band .split-copy .en-label, .cyan-band .split-copy h2 em { color: var(--violet); }
.violet-band { color: var(--white); background: var(--violet); }
.violet-band .split-copy .en-label { color: var(--emerald); }
.dark { color: var(--white); background: var(--black); }

.development { min-height: 620px; display: grid; grid-template-columns: 7fr 5fr; padding: 20px; background: var(--emerald); }
.evidence-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(48px, 6vw, 90px); color: var(--white); background: var(--black); border: 1px solid var(--emerald); border-radius: 28px 0 0 28px; }
.evidence-copy .en-label { margin: 15px 0; color: var(--emerald); }
.evidence-name { margin-top: 36px; font-family: Georgia, "Noto Serif SC", serif; font-size: clamp(25px, 3vw, 43px); line-height: 1.3; letter-spacing: -.045em; }
.evidence-name strong { color: var(--cyan); }
.boundary { margin-top: 30px; padding-top: 18px; border-top: 1px solid var(--emerald); color: var(--soft-violet); font-size: 11px; font-weight: 700; }
.evidence-media { position: relative; min-height: 580px; overflow: hidden; border-radius: 0 28px 28px 0; }

.about { min-height: 660px; display: grid; grid-template-columns: 5fr 7fr; padding: 20px; background: var(--black); }
.about-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(48px, 6vw, 88px); background: linear-gradient(145deg, var(--black), var(--violet)); border: 1px solid var(--violet); border-radius: 28px 0 0 28px; }
.about-copy .en-label { margin: 15px 0; color: var(--cyan); }
.about-copy dl { margin-top: 34px; border-top: 1px solid var(--cyan); }
.about-copy dl div { display: grid; grid-template-columns: 126px 1fr; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--violet); }
.about-copy dt { font-family: "Courier New", monospace; font-size: 10px; font-weight: 900; }
.about-copy dd { font-size: 12px; font-weight: 750; }
.about-media { position: relative; min-height: 620px; overflow: hidden; border: 1px solid var(--cyan); border-left: 0; border-radius: 0 28px 28px 0; }

.contact { min-height: 470px; display: grid; grid-template-columns: .9fr 1.1fr auto; gap: clamp(30px, 6vw, 82px); align-items: center; padding: 76px clamp(28px, 5vw, 74px); color: var(--white); background: linear-gradient(135deg, var(--black), var(--violet), var(--black)); border-top: 1px solid var(--cyan); }
.contact-title .en-label { margin: 15px 0; color: var(--emerald); }
.contact-title > p:last-child { max-width: 540px; margin-top: 22px; color: var(--soft-violet); font-size: 11px; }
.contact-grid { border-top: 1px solid var(--cyan); }
.contact-grid div { display: grid; grid-template-columns: 130px 1fr; padding: 15px 0; border-bottom: 1px solid var(--cyan); }
.contact-grid span { font-family: "Courier New", monospace; font-size: 10px; font-weight: 900; }
.contact-grid strong { font-size: 12px; }
.button-light { color: var(--black); background: var(--white); border-color: var(--white); }

footer { display: grid; grid-template-columns: 1.1fr .4fr 2fr; gap: 30px; align-items: center; padding: 32px clamp(28px, 5vw, 74px); color: var(--black); background: var(--cyan); font-size: 10px; }
footer strong { font-family: Georgia, "Noto Serif SC", serif; font-size: 14px; }

@media (max-width: 1000px) {
  .site-header nav { display: none; }
  .mobile-nav { position: relative; display: block; align-self: center; margin-right: 14px; }
  .mobile-nav summary { padding: 9px 12px; color: var(--black); background: var(--emerald); border: 1px solid var(--cyan); font-family: "Courier New", monospace; font-size: 10px; font-weight: 900; list-style: none; cursor: pointer; }
  .mobile-nav summary::-webkit-details-marker { display: none; }
  .mobile-nav div { position: absolute; top: calc(100% + 12px); right: 0; min-width: 180px; padding: 8px 18px; color: var(--white); background: var(--black); border: 1px solid var(--violet); }
  .mobile-nav a { display: block; padding: 11px 0; border-bottom: 1px solid var(--violet); font-family: "Courier New", monospace; font-size: 10px; font-weight: 900; }
  .mobile-nav a:last-child { border-bottom: 0; }
  .hero, .split-section, .split-section.reverse, .development, .about { grid-template-columns: 1fr; }
  .hero-copy { border-right: 0; border-bottom: 1px solid var(--violet); }
  .hero-media { min-height: 520px; }
  .split-section .split-copy { order: 1; }
  .split-section .split-media { order: 2; }
  .split-media, .evidence-media, .about-media { min-height: 500px; }
  .evidence-copy, .about-copy { border-radius: 28px 28px 0 0; }
  .evidence-media, .about-media { border: 1px solid var(--cyan); border-top: 0; border-radius: 0 0 28px 28px; }
  .contact { grid-template-columns: 1fr 1fr; }
  .contact .button { grid-column: 1 / -1; width: max-content; }
}

@media (max-width: 640px) {
  .site-header { min-height: 64px; }
  .brand { min-width: 0; gap: 8px; padding: 0 10px; font-size: 10px; }
  .brand span { width: 18px; height: 18px; box-shadow: 3px 3px 0 var(--violet); }
  nav .nav-cta { padding: 0 12px; font-size: 9px; }
  .hero-copy { padding: 60px 20px; }
  h1 { font-size: clamp(46px, 13vw, 59px); }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .hero-media { min-height: 380px; }
  .business { padding: 68px 20px; }
  .section-heading { grid-template-columns: 1fr; gap: 8px; }
  .heading-note { text-align: left; }
  .scope-grid { grid-template-columns: 1fr; }
  .scope-grid article { min-height: 138px; }
  .media-pair { grid-template-columns: 1fr; }
  .media-pair figure { height: 280px; }
  .split-section, .development, .about { padding: 10px; }
  .split-copy, .evidence-copy, .about-copy { padding: 64px 20px; }
  .split-media, .evidence-media, .about-media { min-height: 340px; }
  .split-copy dl div, .about-copy dl div { grid-template-columns: 112px 1fr; }
  .contact { grid-template-columns: 1fr; padding: 68px 20px; }
  .contact .button { grid-column: auto; }
  .contact-grid div { grid-template-columns: 108px 1fr; }
  footer { grid-template-columns: 1fr; padding: 30px 20px; }
}

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