:root {
  color-scheme: dark;
  --slate: #0b0f14;
  --panel: #121923;
  --line: #26313d;
  --paper: #f4f0e8;
  --muted: #aab4c0;
  --dim: #718091;
  --orange: #ff6b35;
  --cyan: #46c2cb;
  --brass: #d6a756;
  --blue: #5b8cff;
  --green: #7ee2a8;
  --max: 1180px;
  --gutter: clamp(1.25rem, 4vw, 4rem);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--slate);
  color: var(--paper);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--slate); color: var(--paper); line-height: 1.55; }
a { color: inherit; text-underline-offset: 0.24em; }
a:hover { color: var(--cyan); }
a:focus-visible { outline: 3px solid var(--orange); outline-offset: 4px; border-radius: 2px; }
img { display: block; max-width: 100%; height: auto; }

.skip-link { position: fixed; z-index: 20; left: 1rem; top: 1rem; padding: 0.75rem 1rem; background: var(--paper); color: var(--slate); transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }

.site-header, main > section, footer { width: min(100%, var(--max)); margin-inline: auto; padding-inline: var(--gutter); }
.site-header { min-height: 4.5rem; display: flex; align-items: center; justify-content: space-between; gap: 2rem; border-bottom: 1px solid var(--line); }
.site-header nav, footer nav { display: flex; flex-wrap: wrap; gap: 1.25rem; }
.site-header nav a, footer nav a { color: var(--muted); font-size: 0.9rem; text-decoration: none; }
.wordmark { display: inline-flex; align-items: center; gap: 0.65rem; font-size: 0.85rem; font-weight: 800; letter-spacing: 0.08em; text-decoration: none; }
.wordmark-mark { width: 0.85rem; height: 0.85rem; border-radius: 50%; background: var(--orange); box-shadow: inset 0 0 0 0.25rem var(--slate); }

.hero { min-height: 42rem; display: grid; align-content: center; padding-block: clamp(5rem, 10vw, 9rem); background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 9rem 6rem; background-position: var(--gutter) 0; }
.eyebrow, .kicker, .index { color: var(--orange); font-size: 0.75rem; font-weight: 800; letter-spacing: 0.12em; }
h1, h2, h3 { line-height: 1.06; text-wrap: balance; }
h1 { max-width: 15ch; margin: 1.2rem 0; font-size: clamp(3rem, 8vw, 6.6rem); letter-spacing: -0.055em; }
h2 { max-width: 21ch; margin: 0.5rem 0 1.25rem; font-size: clamp(2rem, 5vw, 4rem); letter-spacing: -0.04em; }
h3 { margin: 0.75rem 0 1rem; font-size: clamp(1.35rem, 2.5vw, 2rem); }
.hero-copy { max-width: 56rem; margin: 0 0 0.8rem; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.35rem); }
.hero-copy-zh { max-width: 48rem; color: var(--dim); font-size: 1rem; }
.section-intro { max-width: 50rem; color: var(--muted); font-size: 1.05rem; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 0.85rem; margin-top: 2rem; }
.button { min-height: 3rem; display: inline-flex; align-items: center; padding: 0.65rem 1rem; border: 1px solid var(--line); text-decoration: none; font-weight: 750; }
.button-primary { background: var(--orange); border-color: var(--orange); color: var(--slate); }
.button-primary:hover { color: var(--slate); background: #ff8358; }
.text-link { font-weight: 750; }
.status-line { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; margin: 4rem 0 0; background: var(--line); border: 1px solid var(--line); }
.status-line div { padding: 1rem; background: rgba(11, 15, 20, 0.92); }
.status-line dt { color: var(--dim); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; }
.status-line dd { margin: 0.2rem 0 0; font-size: 1.55rem; font-weight: 800; }

main > section:not(.hero) { padding-block: clamp(4rem, 9vw, 8rem); border-top: 1px solid var(--line); }
.section-heading { margin-bottom: 2.5rem; }
.rail-list { position: relative; display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 0; margin: 3.5rem 0 0; padding: 0; list-style: none; }
.rail-list::before { content: ""; position: absolute; top: 1.05rem; left: 1rem; right: 1rem; height: 3px; background: #455260; }
.rail-list li { position: relative; z-index: 1; display: grid; justify-items: start; gap: 0.4rem; min-width: 0; }
.rail-list li::before { content: ""; width: 1.1rem; height: 1.1rem; margin: 0.5rem 0 1rem; border-radius: 50%; background: var(--paper); box-shadow: 0 0 0 0.3rem var(--slate), 0 0 0 0.42rem var(--orange); }
.rail-list li:nth-child(2)::before { box-shadow: 0 0 0 0.3rem var(--slate), 0 0 0 0.42rem var(--cyan); }
.rail-list li:nth-child(3)::before { box-shadow: 0 0 0 0.3rem var(--slate), 0 0 0 0.42rem var(--brass); }
.rail-list li:nth-child(5)::before { box-shadow: 0 0 0 0.3rem var(--slate), 0 0 0 0.42rem var(--blue); }
.rail-list li:nth-child(6)::before { box-shadow: 0 0 0 0.3rem var(--slate), 0 0 0 0.42rem var(--green); }
.rail-list span, .rail-list small { color: var(--dim); font-size: 0.72rem; }
.rail-list strong { text-transform: uppercase; letter-spacing: 0.04em; }

.outcome-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--line); }
.outcome-grid article { min-width: 0; padding: clamp(1.4rem, 3vw, 2.5rem); }
.outcome-grid article + article { border-left: 1px solid var(--line); }
.outcome-grid p:not(.index) { color: var(--muted); }
.outcome-grid a { color: var(--cyan); font-weight: 750; }

.proof { display: grid; grid-template-columns: minmax(17rem, 0.75fr) minmax(0, 1.5fr); align-items: center; gap: clamp(2rem, 5vw, 5rem); }
.proof-copy p { color: var(--muted); }
.proof img { border: 1px solid var(--line); }
.boundary { padding-left: 1rem; border-left: 3px solid var(--brass); color: var(--dim) !important; }

.media-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.media-grid article { min-width: 0; background: var(--panel); }
.media-grid video { display: block; width: 100%; height: auto; background: #05070a; border-bottom: 1px solid var(--line); }
.media-copy { padding: clamp(1.25rem, 3vw, 2rem); }
.media-copy p:not(.index) { color: var(--muted); }
.media-note { margin: 1.5rem 0 0; color: var(--dim); font-size: 0.9rem; }

.install-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(17rem, 0.65fr); gap: clamp(2rem, 5vw, 5rem); align-items: start; }
pre { margin: 0; padding: clamp(1.25rem, 3vw, 2.25rem); overflow: auto; border: 1px solid var(--line); background: #080b0f; color: var(--green); font: 0.92rem/1.75 ui-monospace, SFMono-Regular, Consolas, monospace; }
.install-notes { color: var(--muted); }
.install-notes ul { padding-left: 1.2rem; }
.install-notes li + li { margin-top: 0.65rem; }

.evidence-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.evidence-grid p { margin: 0; padding: clamp(1.4rem, 3vw, 2.5rem); background: var(--panel); color: var(--muted); }
.evidence-grid strong { color: var(--paper); }

footer { display: flex; justify-content: space-between; gap: 2rem; padding-block: 2rem; border-top: 1px solid var(--line); color: var(--dim); font-size: 0.85rem; }
footer p { margin: 0; }

@media (max-width: 800px) {
  .site-header { align-items: flex-start; padding-block: 1rem; }
  .site-header nav { justify-content: flex-end; gap: 0.75rem; }
  .hero { min-height: auto; background-size: 6rem 5rem; }
  .status-line, .evidence-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rail-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem 1rem; }
  .rail-list::before { display: none; }
  .outcome-grid, .proof, .media-grid, .install-layout { grid-template-columns: 1fr; }
  .outcome-grid article + article { border-left: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 520px) {
  .site-header { display: grid; }
  .site-header nav { justify-content: flex-start; }
  h1 { font-size: clamp(2.75rem, 15vw, 4.25rem); }
  .status-line { grid-template-columns: 1fr 1fr; }
  .hero-actions { align-items: stretch; }
  .button { width: 100%; justify-content: center; }
  footer { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}