*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul[class], ol[class] { padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }
img, picture, svg, video { display: block; max-width: 100%; }
body {
  margin: 0;
  background-color: var(--color-void);
  background-image:
    radial-gradient(ellipse 70% 48% at 88% 0%, rgba(123, 47, 255, 0.16), transparent 62%),
    radial-gradient(ellipse 46% 34% at 4% 100%, rgba(141, 215, 255, 0.07), transparent 60%),
    linear-gradient(115deg, rgba(255, 77, 141, 0.06), transparent 45%);
  color: var(--text-main);
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--color-frost); text-decoration: none; transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease; }
a:hover { color: var(--color-flare); }
h1, h2, h3, h4 { font-family: var(--font-sans); font-weight: 900; line-height: 1.2; color: var(--color-surface); text-wrap: balance; }
::selection { background: var(--color-flare); color: var(--color-void); }
:focus-visible { outline: 2px solid var(--color-flare); outline-offset: 3px; }
#main-content { scroll-margin-top: var(--header-h); }

:root {
  --color-void: #0B1D3A;
  --color-pulse: #7B2FFF;
  --color-flare: #FF6A00;
  --color-frost: #8DD7FF;
  --color-surface: #F5F7FA;
  --color-ink: #0A0E17;
  --color-aurora: #FF4D8D;
  --color-glass: rgba(255, 255, 255, 0.1);
  --color-glass-strong: rgba(255, 255, 255, 0.16);
  --color-border: rgba(141, 215, 255, 0.22);
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, Georgia, serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, "Liberation Mono", monospace;
  --space-page: clamp(20px, 4vw, 56px);
  --container-max: 1280px;
  --header-h: 72px;
  --radius: 2px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-card: 0 12px 40px rgba(10, 14, 23, 0.3);
  --shadow-deep: 0 24px 70px rgba(10, 14, 23, 0.5);
  --text-main: rgba(245, 247, 250, 0.88);
  --text-dim: rgba(245, 247, 250, 0.58);
}

.container { width: min(100% - var(--space-page) * 2, var(--container-max)); margin-inline: auto; }

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 999;
  padding: 12px 20px;
  background: var(--color-flare);
  color: var(--color-void);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.08em;
  border-radius: var(--radius);
  transition: top 0.25s ease;
}
.skip-link:focus { top: 16px; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background-color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}
.site-header.is-scrolled {
  background: rgba(11, 29, 58, 0.94);
  border-bottom-color: var(--color-border);
  box-shadow: 0 10px 34px rgba(10, 14, 23, 0.28);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: var(--header-h);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  color: var(--color-surface);
}
.brand-lockup:hover { color: var(--color-frost); }
.brand-lockup__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, rgba(123, 47, 255, 0.95), rgba(11, 29, 58, 0.9));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 11px), calc(100% - 11px) 100%, 0 100%);
  border: 1px solid rgba(141, 215, 255, 0.42);
  box-shadow: 0 0 22px rgba(123, 47, 255, 0.35);
}
.brand-lockup__mark::after {
  content: "";
  position: absolute;
  right: 3px;
  top: 3px;
  width: 5px;
  height: 5px;
  background: var(--color-flare);
}
.brand-lockup__glyph { font-family: var(--font-sans); font-weight: 900; font-size: 19px; line-height: 1; color: var(--color-surface); }
.brand-lockup__meta { display: flex; flex-direction: column; gap: 1px; line-height: 1.15; }
.brand-lockup__name { font-family: var(--font-sans); font-weight: 900; font-size: 16px; letter-spacing: 0.12em; color: currentColor; }
.brand-lockup__tag { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.26em; color: var(--color-frost); }
.brand-lockup--footer .brand-lockup__mark { width: 52px; height: 52px; }
.brand-lockup--footer .brand-lockup__glyph { font-size: 24px; }
.brand-lockup--footer .brand-lockup__name { font-size: 20px; }

.nav-toggle {
  position: relative;
  z-index: 220;
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 14px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-surface);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.nav-toggle:hover { border-color: var(--color-flare); color: var(--color-flare); }
.nav-toggle__icon { position: relative; width: 18px; height: 2px; background: currentColor; transition: background 0.2s; }
.nav-toggle__icon::before, .nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 0.3s var(--ease-out);
}
.nav-toggle__icon::before { top: -5px; }
.nav-toggle__icon::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__label { line-height: 1; }

.primary-nav__list { display: flex; align-items: center; gap: clamp(18px, 2.2vw, 34px); margin: 0; }
.primary-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 2px;
  border-bottom: 2px solid transparent;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-surface);
  transition: color 0.2s, border-color 0.2s;
}
.primary-nav__link:hover { color: var(--color-flare); border-bottom-color: var(--color-flare); }
.primary-nav__index { font-family: var(--font-mono); font-size: 10px; font-weight: 500; color: var(--color-pulse); transition: color 0.2s; }
.primary-nav__link:hover .primary-nav__index { color: var(--color-flare); }
.primary-nav__link[aria-current="page"] { color: var(--color-flare); border-bottom-color: var(--color-flare); }
.primary-nav__link[aria-current="page"] .primary-nav__index { color: var(--color-flare); }
.primary-nav__label { display: inline-block; }
.primary-nav__header, .primary-nav__note { display: none; }

.page-shell { padding: calc(var(--header-h) + clamp(36px, 7vw, 96px)) 0 clamp(64px, 10vw, 120px); }
.content-block { max-width: 74ch; }
.content-block h2 { margin: 1.8em 0 0.6em; font-size: clamp(1.4rem, 2.6vw, 2rem); }
.content-block h3 { margin: 1.6em 0 0.5em; font-size: 1.1rem; }
.content-block p { margin-bottom: 1.4em; font-size: 1rem; line-height: 2; }
.content-block a { text-decoration: underline; text-underline-offset: 3px; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--color-frost);
  text-transform: uppercase;
}
.breadcrumb__list { display: flex; flex-wrap: wrap; gap: 8px; }
.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb__link { color: var(--color-frost); }
.breadcrumb__link:hover { color: var(--color-flare); }
.breadcrumb__sep { color: var(--color-pulse); }
.breadcrumb__current { color: var(--color-flare); }

.page-title { margin: 0 0 18px; font-size: clamp(2.2rem, 5.4vw, 4rem); letter-spacing: -0.02em; }
.page-sub { max-width: 64ch; font-family: var(--font-serif); font-size: clamp(1rem, 1.6vw, 1.18rem); line-height: 1.9; color: var(--text-dim); }
.page-sub a { text-decoration: underline; text-underline-offset: 3px; }

.section { position: relative; padding-block: clamp(64px, 9vw, 130px); }
.section--tall { padding-block: clamp(96px, 14vw, 210px); }
.section--light { background: var(--color-surface); color: var(--color-ink); }
.section--light h1, .section--light h2, .section--light h3, .section--light h4 { color: var(--color-ink); }
.section--light a:not(.btn) { color: var(--color-pulse); }
.section--light a:not(.btn):hover { color: var(--color-flare); }
.section--light .lede, .section--light .page-sub { color: rgba(10, 14, 23, 0.7); }
.section--light .eyebrow { color: var(--color-pulse); }
.section--light .stamp, .panel--light .stamp, .card--light .stamp { color: var(--color-pulse); }
.section--light .btn--ghost, .panel--light .btn--ghost { border-color: var(--color-ink); color: var(--color-ink); }
.section--light .btn--ghost:hover, .panel--light .btn--ghost:hover { border-color: var(--color-flare); color: var(--color-flare); background: rgba(255, 106, 0, 0.06); }
.section--cut { clip-path: polygon(0 0, 100% 0, 100% calc(100% - 48px), 0 100%); }
.section--cut-top { clip-path: polygon(0 48px, 100% 0, 100% 100%, 0 100%); }
.section--cut-top.section--cut { clip-path: polygon(0 48px, 100% 0, 100% calc(100% - 48px), 0 100%); }

.panel-stack { display: grid; gap: clamp(72px, 10vw, 150px); }
.panel { position: relative; }
.panel--glass {
  padding: clamp(24px, 5vw, 52px);
  background: var(--color-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), var(--shadow-card);
}
.panel--light {
  padding: clamp(24px, 5vw, 52px);
  background: var(--color-surface);
  color: var(--color-ink);
  border-radius: var(--radius);
  box-shadow: 12px 12px 0 rgba(123, 47, 255, 0.18), 0 18px 42px rgba(10, 14, 23, 0.14);
}
.panel--light h1, .panel--light h2, .panel--light h3, .panel--light h4 { color: var(--color-ink); }

.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-frost);
}
.eyebrow::before { content: ""; width: 34px; height: 1px; background: currentColor; }
.eyebrow--flare { color: var(--color-flare); }

.display-title {
  margin: 0 0 24px;
  font-family: var(--font-sans);
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--color-surface);
}
.section--light .display-title, .panel--light .display-title { color: var(--color-ink); }

.lede {
  max-width: 62ch;
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.95;
  color: rgba(245, 247, 250, 0.74);
}
.section--light .lede, .panel--light .lede { color: rgba(10, 14, 23, 0.72); }

.index-note {
  padding-left: 16px;
  border-left: 2px solid var(--color-pulse);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.v-note {
  writing-mode: vertical-rl;
  white-space: nowrap;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--color-frost);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 30px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1;
  text-align: center;
  cursor: pointer;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s, background-color 0.25s, border-color 0.25s, color 0.2s;
}
.btn:hover { transform: translateY(-3px); }
.btn:active { transform: translateY(-1px); }
.btn--primary { background: var(--color-flare); color: var(--color-void); }
.btn--primary:hover { box-shadow: 0 14px 32px rgba(255, 106, 0, 0.32); color: var(--color-void); }
.btn--ghost { border-color: rgba(245, 247, 250, 0.32); color: var(--color-surface); }
.btn--ghost:hover { border-color: var(--color-flare); color: var(--color-flare); background: rgba(255, 106, 0, 0.08); }
.btn--dark { background: var(--color-void); color: var(--color-surface); }
.btn--dark:hover { box-shadow: 0 14px 32px rgba(10, 14, 23, 0.3); color: var(--color-frost); }

.stamp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-frost);
}
.stamp--flare { color: var(--color-flare); }
.stamp--pulse { color: var(--color-pulse); }

.card {
  position: relative;
  padding: 28px;
  background: var(--color-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s ease, border-color 0.35s ease, background-color 0.35s ease;
}
.card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 106, 0, 0.5);
  background: var(--color-glass-strong);
  box-shadow: var(--shadow-card);
}
.card--light { background: #FFFFFF; border-color: rgba(10, 14, 23, 0.08); color: var(--color-ink); }
.card--light:hover { background: #FFFFFF; border-color: var(--color-pulse); box-shadow: var(--shadow-card); }
.card--light h1, .card--light h2, .card--light h3 { color: var(--color-ink); }
.card__title { margin: 0 0 10px; font-size: 1.15rem; }
.card__text { margin: 0; font-size: 15px; line-height: 1.85; color: inherit; opacity: 0.82; }

.asset-frame {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(123, 47, 255, 0.18), rgba(11, 29, 58, 0.55)),
    repeating-linear-gradient(0deg, transparent 0, transparent 9px, rgba(141, 215, 255, 0.05) 9px, rgba(141, 215, 255, 0.05) 10px);
  border: 1px solid rgba(141, 215, 255, 0.2);
}
.asset-frame::before { content: ""; display: block; padding-bottom: 60%; }
.asset-frame--wide::before { padding-bottom: 46%; }
.asset-frame--square::before { padding-bottom: 100%; }
.asset-frame--poster::before { padding-bottom: 132%; }
.asset-frame::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 12px;
  width: 18px;
  height: 18px;
  border-top: 2px solid var(--color-flare);
  border-right: 2px solid var(--color-flare);
  opacity: 0.9;
}
.asset-frame__placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: rgba(141, 215, 255, 0.55);
  text-transform: uppercase;
}

.hero-frame {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: calc(var(--header-h) + 48px) var(--space-page) 64px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 55% at 72% 18%, rgba(123, 47, 255, 0.22), transparent 62%),
    radial-gradient(ellipse 55% 45% at 18% 82%, rgba(255, 106, 0, 0.12), transparent 56%),
    var(--color-void);
}
.hero-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(141, 215, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(141, 215, 255, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}
.hero-frame__window {
  position: relative;
  z-index: 2;
  width: min(100%, 1180px);
  margin-inline: auto;
  padding: clamp(26px, 5.5vw, 60px);
  background: linear-gradient(135deg, rgba(11, 29, 58, 0.82) 0%, rgba(123, 47, 255, 0.16) 100%);
  border: 1px solid rgba(141, 215, 255, 0.22);
  box-shadow: var(--shadow-deep);
}
.hero-frame__window::before, .hero-frame__window::after {
  content: "";
  position: absolute;
  width: 52px;
  height: 52px;
  pointer-events: none;
}
.hero-frame__window::before {
  top: -1px;
  left: -1px;
  border-top: 3px solid var(--color-flare);
  border-left: 3px solid var(--color-flare);
}
.hero-frame__window::after {
  bottom: -1px;
  right: -1px;
  border-bottom: 3px solid var(--color-pulse);
  border-right: 3px solid var(--color-pulse);
}

.divider-angle {
  height: 32px;
  border: none;
  background: linear-gradient(135deg, transparent 0, transparent 49%, var(--color-border) 49%, var(--color-border) 51%, transparent 51%, transparent 100%);
  background-size: 40px 40px;
  opacity: 0.7;
}
.divider-ruler {
  height: 20px;
  border: none;
  border-top: 1px solid var(--color-border);
  background: repeating-linear-gradient(90deg, var(--color-border) 0, var(--color-border) 8px, transparent 8px, transparent 16px);
  opacity: 0.6;
  -webkit-mask-image: linear-gradient(90deg, transparent, black 12%, black 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, black 12%, black 88%, transparent);
}

.site-footer {
  position: relative;
  background: linear-gradient(180deg, var(--color-void) 0%, #060B16 100%);
  border-top: 1px solid var(--color-border);
  padding-top: clamp(48px, 7vw, 88px);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-flare), var(--color-pulse), transparent);
}
.site-footer__main {
  display: grid;
  grid-template-columns: minmax(280px, 1.1fr) minmax(0, 2fr);
  gap: clamp(32px, 5vw, 72px);
  padding-bottom: clamp(32px, 5vw, 56px);
}
.site-footer__identity { display: flex; flex-direction: column; align-items: flex-start; }
.site-footer__about {
  margin-top: 20px;
  max-width: 36ch;
  font-family: var(--font-serif);
  font-size: 14px;
  line-height: 1.9;
  color: rgba(245, 247, 250, 0.55);
}
.site-footer__trust {
  margin-top: 16px;
  max-width: 42ch;
  padding: 12px 16px;
  background: rgba(255, 106, 0, 0.08);
  border-left: 2px solid var(--color-flare);
  font-size: 13px;
  line-height: 1.8;
  color: rgba(245, 247, 250, 0.66);
}
.site-footer__columns { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(24px, 3vw, 40px); }
.site-footer__column { min-width: 0; }
.site-footer__heading {
  margin-bottom: 18px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-frost);
}
.site-footer__list { display: grid; gap: 10px; }
.site-footer__list a {
  font-size: 14px;
  color: rgba(245, 247, 250, 0.64);
  transition: color 0.2s, padding-left 0.2s;
}
.site-footer__list a:hover { color: var(--color-flare); padding-left: 4px; }
.site-footer__contact-line { display: grid; gap: 2px; }
.site-footer__contact-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--color-pulse);
}
.site-footer__contact-value {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(245, 247, 250, 0.64);
  word-break: break-word;
}
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  padding-block: 20px;
  border-top: 1px solid rgba(141, 215, 255, 0.12);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(245, 247, 250, 0.42);
}
.site-footer__copyright { margin-right: auto; }
.site-footer__icp { letter-spacing: 0.14em; }

.back-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 80;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 10px 12px;
  background: rgba(11, 29, 58, 0.86);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-frost);
  font-family: var(--font-mono);
  cursor: pointer;
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s var(--ease-out), color 0.2s, border-color 0.2s;
}
.back-top.is-visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-top:hover { color: var(--color-flare); border-color: var(--color-flare); }
.back-top__icon { font-size: 18px; line-height: 1; }
.back-top__text { font-size: 10px; letter-spacing: 0.2em; }

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}
[data-reveal="left"] { transform: translateX(-34px); }
[data-reveal="right"] { transform: translateX(34px); }
[data-reveal="scale"] { transform: scale(0.96); }
[data-reveal].is-revealed { opacity: 1; transform: none; }

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 200;
    display: flex;
    flex-direction: column;
    width: min(440px, 92vw);
    height: 100vh;
    height: 100dvh;
    padding: calc(var(--header-h) + 28px) 32px 32px;
    overflow-y: auto;
    background: linear-gradient(165deg, rgba(18, 38, 74, 0.98) 0%, rgba(11, 29, 58, 0.99) 55%, rgba(123, 47, 255, 0.12) 130%);
    border-left: 1px solid var(--color-border);
    visibility: hidden;
    transform: translateX(103%);
    transition: transform 0.45s var(--ease-out), visibility 0s linear 0.45s;
  }
  .primary-nav[data-open] {
    visibility: visible;
    transform: translateX(0);
    box-shadow: var(--shadow-deep);
    transition: transform 0.45s var(--ease-out), visibility 0s;
  }
  .primary-nav__header {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 26px;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--color-border);
  }
  .primary-nav__title { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.28em; color: var(--color-flare); }
  .primary-nav__sub { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; color: rgba(245, 247, 250, 0.45); }
  .primary-nav__list { flex-direction: column; align-items: stretch; gap: 2px; }
  .primary-nav__item { border-bottom: 1px solid rgba(141, 215, 255, 0.08); }
  .primary-nav__link {
    display: flex;
    width: 100%;
    padding: 14px 4px;
    border-bottom: none;
    font-size: 21px;
    font-weight: 900;
    letter-spacing: 0.04em;
  }
  .primary-nav__index { font-size: 11px; }
  .primary-nav__note {
    display: block;
    margin-top: auto;
    padding-top: 24px;
    border-top: 1px dashed var(--color-border);
    font-family: var(--font-serif);
    font-size: 14px;
    line-height: 1.9;
    color: rgba(245, 247, 250, 0.5);
  }
  .primary-nav__note a { font-family: var(--font-mono); font-size: 13px; color: var(--color-frost); }
  body.is-nav-open { overflow: hidden; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer__main { grid-template-columns: 1fr; }
  .site-footer__columns { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 720px) {
  body { font-size: 15px; }
  .lede { font-size: 1rem; }
  .hero-frame { padding-bottom: 40px; }
  .grid--2, .grid--3 { grid-template-columns: 1fr; }
  .site-footer__columns { grid-template-columns: 1fr; gap: 28px; }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .site-footer__copyright { margin-right: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover { transform: none; }
  .back-top { transition: opacity 0.01ms; }
}