:root {
  --void: #071017;
  --night: #0b1721;
  --panel: #102331;
  --panel-raised: #142d3e;
  --line: rgba(186, 222, 232, 0.18);
  --line-strong: rgba(186, 222, 232, 0.36);
  --ink: #f2f8f7;
  --muted: #b1c3c8;
  --dim: #7f989f;
  --signal: #a9e85a;
  --signal-ink: #102310;
  --cyan: #5ed9e8;
  --amber: #ffc76a;
  --danger: #ff8c93;
  --violet: #b4a4ff;
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK SC", "Microsoft YaHei", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --radius: 1.25rem;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.25);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--void); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 83% 7%, rgba(94, 217, 232, 0.13), transparent 25rem),
    radial-gradient(circle at 5% 37%, rgba(169, 232, 90, 0.085), transparent 30rem),
    linear-gradient(180deg, #09141d 0%, var(--void) 62rem);
  font-family: var(--sans);
  line-height: 1.65;
}

::selection { color: var(--signal-ink); background: var(--signal); }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--cyan); outline-offset: 4px; }
button { font: inherit; }

.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link {
  position: fixed; z-index: 30; top: 12px; left: 12px; padding: 0.65rem 0.85rem;
  color: var(--signal-ink); background: var(--signal); border-radius: 0.5rem;
  transform: translateY(-180%); transition: transform 160ms ease;
}
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; z-index: 20; top: 0; border-bottom: 1px solid rgba(186, 222, 232, 0.1); background: rgba(7, 16, 23, 0.84); backdrop-filter: blur(18px); }
.header-row { display: flex; min-height: 72px; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: 0.75rem; text-decoration: none; font-weight: 750; letter-spacing: -0.025em; }
.brand-mark { display: grid; width: 2rem; height: 2rem; place-items: center; border: 1px solid rgba(169, 232, 90, 0.55); border-radius: 50%; color: var(--signal); font-family: var(--mono); font-size: 0.72rem; box-shadow: inset 0 0 16px rgba(169, 232, 90, 0.12); }
.brand span:last-child { font-size: 0.93rem; }
.site-nav { display: flex; align-items: center; gap: 0.15rem; }
.site-nav a { min-height: 44px; display: inline-flex; align-items: center; padding: 0.65rem 0.72rem; color: var(--muted); text-decoration: none; font-size: 0.86rem; }
.site-nav a:hover { color: var(--ink); }
.site-nav .language-link { margin-left: 0.35rem; padding-inline: 0.85rem; color: var(--signal); border: 1px solid rgba(169, 232, 90, 0.42); border-radius: 999px; font-family: var(--mono); font-size: 0.72rem; }
.menu-toggle { display: none; min-width: 44px; min-height: 44px; padding: 0.35rem; color: var(--ink); border: 1px solid var(--line-strong); border-radius: 0.65rem; background: transparent; }
.menu-toggle span { display: block; width: 19px; height: 2px; margin: 4px auto; background: currentColor; }

.hero { position: relative; min-height: min(780px, calc(100vh - 72px)); display: grid; align-items: center; padding: clamp(5rem, 11vw, 9rem) 0 clamp(4rem, 8vw, 7rem); overflow: hidden; }
.hero::before { position: absolute; z-index: -1; content: ""; inset: 0; background-image: linear-gradient(rgba(186, 222, 232, 0.055) 1px, transparent 1px), linear-gradient(90deg, rgba(186, 222, 232, 0.055) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to bottom, black, transparent 88%); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(270px, 0.72fr); gap: clamp(2.5rem, 9vw, 8rem); align-items: end; }
.eyebrow, .section-kicker, .mini-label, .role-id, .mode-label, .fact-label { color: var(--cyan); font-family: var(--mono); font-size: 0.71rem; font-weight: 700; letter-spacing: 0.13em; text-transform: uppercase; }
.eyebrow { display: flex; gap: 0.72rem; align-items: center; }
.eyebrow::before { width: 0.55rem; height: 0.55rem; content: ""; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 5px rgba(169, 232, 90, 0.11), 0 0 22px rgba(169, 232, 90, 0.55); }
h1 { max-width: 840px; margin: 1.2rem 0 1.45rem; font-size: clamp(3.1rem, 7.4vw, 7.1rem); font-weight: 760; line-height: 0.94; letter-spacing: -0.075em; text-wrap: balance; }
h1 em { color: transparent; font-style: normal; -webkit-text-stroke: 1.25px rgba(242, 248, 247, 0.78); }
.hero-copy { max-width: 735px; margin: 0; color: var(--muted); font-size: clamp(1.04rem, 1.65vw, 1.22rem); text-wrap: pretty; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-top: 2rem; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 0.72rem 1rem; border: 1px solid var(--line-strong); border-radius: 0.65rem; text-decoration: none; font-weight: 700; font-size: 0.88rem; transition: transform 160ms ease, background 160ms ease, border-color 160ms ease; }
.button:hover { transform: translateY(-2px); border-color: var(--cyan); }
.button.primary { color: var(--signal-ink); border-color: var(--signal); background: var(--signal); }
.button.secondary { color: var(--ink); background: rgba(255, 255, 255, 0.025); }
.hero-status { padding: 1.4rem; border: 1px solid rgba(169, 232, 90, 0.35); border-radius: var(--radius); background: linear-gradient(145deg, rgba(169, 232, 90, 0.1), rgba(16, 35, 49, 0.82)); box-shadow: var(--shadow); }
.hero-status strong { display: block; margin: 0.55rem 0; color: var(--signal); font-family: var(--mono); font-size: clamp(1.05rem, 2vw, 1.45rem); line-height: 1.25; }
.hero-status p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.section { padding: clamp(4.75rem, 10vw, 8rem) 0; }
.section-rule { border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(230px, 0.52fr); gap: 2rem; align-items: end; margin-bottom: clamp(2rem, 5vw, 4rem); }
h2 { margin: 0.65rem 0 0; max-width: 820px; font-size: clamp(2.15rem, 4.6vw, 4.25rem); font-weight: 730; line-height: 1.02; letter-spacing: -0.062em; text-wrap: balance; }
.section-intro { margin: 0; color: var(--muted); font-size: 1rem; text-wrap: pretty; }

.architecture { container-type: inline-size; }
.architecture-board { overflow: hidden; padding: clamp(1rem, 3vw, 2rem); border: 1px solid var(--line-strong); border-radius: var(--radius); background: linear-gradient(145deg, rgba(20, 45, 62, 0.93), rgba(10, 23, 33, 0.84)); box-shadow: var(--shadow); }
.layer-grid { display: grid; grid-template-columns: 12rem 1fr; gap: 1rem; align-items: stretch; }
.layer-title { display: grid; align-content: center; padding: 1.15rem; border: 1px solid var(--line); border-radius: 0.85rem; background: rgba(7, 16, 23, 0.52); }
.layer-title strong { margin-top: 0.25rem; font-size: 1.2rem; letter-spacing: -0.035em; }
.layer-title p { margin: 0.4rem 0 0; color: var(--muted); font-size: 0.82rem; }
.layer-items { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.75rem; }
.layer-item { min-height: 105px; padding: 1rem; border: 1px solid var(--line); border-radius: 0.85rem; background: rgba(7, 16, 23, 0.4); }
.layer-item strong { display: block; font-family: var(--mono); font-size: 0.84rem; }
.layer-item span { display: block; margin-top: 0.35rem; color: var(--muted); font-size: 0.8rem; line-height: 1.45; }
.layer-item.program strong { color: var(--signal); }
.layer-item.memory strong { color: var(--cyan); }
.layer-item.trace strong { color: var(--amber); }
.architecture-note { display: grid; grid-template-columns: auto 1fr; gap: 0.85rem; align-items: start; margin: 1rem 0 0; padding: 1rem 0.1rem 0; color: var(--muted); font-size: 0.91rem; }
.architecture-note b { display: inline-grid; width: 1.45rem; height: 1.45rem; place-items: center; color: var(--signal); border: 1px solid rgba(169, 232, 90, 0.45); border-radius: 50%; font-family: var(--mono); }
.architecture-poster { display: grid; grid-template-columns: minmax(250px, 0.62fr) minmax(0, 1fr); gap: clamp(1.25rem, 4vw, 4rem); align-items: center; margin: clamp(1.5rem, 4vw, 3rem) 0 0; padding: clamp(1rem, 3vw, 2rem); border: 1px solid var(--line-strong); border-radius: var(--radius); background: linear-gradient(135deg, rgba(7, 16, 23, 0.92), rgba(20, 45, 62, 0.74)); box-shadow: var(--shadow); }
.poster-visual { display: grid; place-items: center; padding: clamp(0.55rem, 2vw, 1.1rem); border: 1px solid var(--line); border-radius: 1rem; background: radial-gradient(circle at 50% 32%, rgba(94, 217, 232, 0.18), transparent 42%), #071017; }
.poster-visual a { display: block; width: min(100%, 390px); aspect-ratio: 2 / 3; border-radius: 0.72rem; overflow: hidden; }
.poster-visual img { display: block; width: 100%; height: 100%; object-fit: contain; border: 1px solid rgba(94, 217, 232, 0.35); border-radius: 0.72rem; box-shadow: 0 20px 44px rgba(0, 0, 0, 0.44); transition: transform 180ms ease, border-color 180ms ease; }
.poster-visual a:hover img { transform: translateY(-3px); border-color: var(--signal); }
.poster-copy h3 { max-width: 690px; margin: 0.65rem 0 0.9rem; font-size: clamp(1.5rem, 3vw, 2.65rem); letter-spacing: -0.055em; line-height: 1.08; }
.poster-copy > p { max-width: 700px; margin: 0; color: var(--muted); }
.poster-legend { display: grid; gap: 0.7rem; margin: 1.35rem 0; padding: 0; list-style: none; }
.poster-legend li { display: grid; grid-template-columns: 2rem 1fr; gap: 0.7rem; align-items: start; }
.poster-legend span { display: inline-grid; width: 2rem; height: 2rem; place-items: center; color: var(--signal); border: 1px solid rgba(169, 232, 90, 0.4); border-radius: 0.5rem; background: rgba(169, 232, 90, 0.07); font-family: var(--mono); font-size: 0.72rem; }
.poster-legend p, .poster-note { margin: 0; color: var(--muted); font-size: 0.9rem; line-height: 1.55; }
.poster-legend strong, .poster-note strong { color: var(--ink); }
.poster-note { padding-top: 1rem; border-top: 1px solid var(--line); }

.mode-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.mode-card { padding: clamp(1.25rem, 3vw, 2rem); border: 1px solid var(--line-strong); border-radius: var(--radius); background: rgba(16, 35, 49, 0.62); }
.mode-card.proposal { background: linear-gradient(145deg, rgba(180, 164, 255, 0.11), rgba(16, 35, 49, 0.7)); }
.mode-card h3 { margin: 0.65rem 0; font-size: clamp(1.6rem, 3vw, 2.45rem); letter-spacing: -0.055em; }
.mode-card > p { margin: 0; color: var(--muted); }
.mode-flow { display: flex; flex-wrap: wrap; gap: 0.45rem; align-items: center; margin: 1.35rem 0 0; }
.mode-flow span { display: inline-flex; min-height: 31px; align-items: center; padding: 0.25rem 0.52rem; color: var(--ink); border: 1px solid var(--line); border-radius: 999px; background: rgba(7, 16, 23, 0.56); font-family: var(--mono); font-size: 0.69rem; }
.mode-flow i { color: var(--dim); font-family: var(--mono); font-style: normal; }

.safeguard-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; border: 1px solid var(--line-strong); border-radius: var(--radius); overflow: hidden; background: var(--line); }
.safeguard { min-height: 235px; padding: 1.35rem; background: var(--night); }
.safeguard .fact-label { color: var(--signal); }
.safeguard h3 { margin: 0.72rem 0; font-size: 1.12rem; letter-spacing: -0.035em; }
.safeguard p { margin: 0; color: var(--muted); font-size: 0.88rem; }

.roles { container-type: inline-size; }
.role-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.8rem; }
.role-card { min-height: 205px; display: flex; flex-direction: column; justify-content: space-between; padding: 1.05rem; border: 1px solid var(--line); border-radius: 1rem; background: rgba(16, 35, 49, 0.5); transition: transform 160ms ease, border-color 160ms ease; }
.role-card:hover { transform: translateY(-3px); border-color: var(--cyan); }
.role-id { color: var(--signal); }
.role-card h3 { margin: 0.5rem 0; font-size: 1.18rem; letter-spacing: -0.04em; }
.role-card p { margin: 0; color: var(--muted); font-size: 0.82rem; line-height: 1.55; }
.role-card .role-tag { margin-top: 1rem; color: var(--dim); font-family: var(--mono); font-size: 0.65rem; }

.boundary { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(270px, 0.7fr); gap: 1rem; align-items: stretch; }
.boundary-main, .boundary-side { padding: clamp(1.35rem, 3vw, 2.2rem); border-radius: var(--radius); }
.boundary-main { border: 1px solid rgba(255, 199, 106, 0.48); background: linear-gradient(145deg, rgba(255, 199, 106, 0.095), rgba(16, 35, 49, 0.76)); }
.boundary-main h3 { margin: 0.6rem 0 1rem; font-size: clamp(1.6rem, 3vw, 2.5rem); letter-spacing: -0.055em; }
.boundary-main p { max-width: 750px; margin: 0; color: var(--muted); }
.boundary-list { display: grid; gap: 0.72rem; margin: 1.25rem 0 0; padding: 0; list-style: none; }
.boundary-list li { position: relative; padding-left: 1.35rem; color: #d1dde0; font-size: 0.9rem; }
.boundary-list li::before { position: absolute; left: 0; color: var(--amber); content: "—"; }
.boundary-side { display: grid; align-content: space-between; border: 1px solid var(--line-strong); background: rgba(7, 16, 23, 0.55); }
.boundary-side p { margin: 0.65rem 0 0; color: var(--muted); font-size: 0.86rem; }
.boundary-side code { color: var(--cyan); font-family: var(--mono); font-size: 0.74rem; overflow-wrap: anywhere; }

.closing { padding: clamp(4rem, 8vw, 6.5rem) 0; text-align: center; }
.closing h2 { margin-inline: auto; }
.closing p { max-width: 650px; margin: 1rem auto 1.75rem; color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); padding: 1.7rem 0 2.5rem; color: var(--dim); font-size: 0.78rem; }
.footer-row { display: flex; justify-content: space-between; gap: 1rem; }
.footer-row p { margin: 0; }

.reveal { opacity: 1; transform: none; }
.motion-ready .reveal { opacity: 0; transform: translateY(16px); transition: opacity 420ms ease, transform 420ms ease; }
.motion-ready .reveal.is-visible { opacity: 1; transform: none; }

@container (max-width: 760px) {
  .role-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .hero { min-height: auto; }
  .hero-grid, .section-heading, .boundary { grid-template-columns: 1fr; }
  .architecture-poster { grid-template-columns: minmax(0, 1fr); }
  .hero-status { max-width: 560px; }
  .safeguard-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .layer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .shell { width: min(100% - 28px, 1180px); }
  .site-nav { position: absolute; top: calc(100% + 1px); left: 0; right: 0; display: flex; align-items: stretch; flex-direction: column; gap: 0; padding: 0.65rem 14px 1rem; border-bottom: 1px solid var(--line-strong); background: #09141d; }
  .js-nav .menu-toggle { display: inline-block; }
  .js-nav .site-nav { display: none; }
  .js-nav .site-nav[data-open="true"] { display: flex; }
  .site-nav a { width: 100%; justify-content: space-between; }
  .site-nav .language-link { margin: 0.45rem 0 0; justify-content: center; }
  .section-heading { margin-bottom: 2rem; }
  .layer-items { grid-template-columns: 1fr; }
  .safeguard-grid { grid-template-columns: 1fr; }
  .safeguard { min-height: 0; }
  .role-grid { grid-template-columns: 1fr; }
  .role-card { min-height: 0; }
  .footer-row { flex-direction: column; }
}
@media (max-width: 430px) {
  h1 { font-size: clamp(3rem, 17vw, 4.4rem); }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .button { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}