:root {
  color-scheme: light;
  --paper: #f8f7f3;
  --ink: #25241f;
  --muted: #58574f;
  --line: #d9d5ca;
  --accent: #a43c1e;
  --mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--paper);
  color: var(--ink);
}

*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
p, h1, h2, h3, ol, figure { margin: 0; }
.shell { width: min(1080px, calc(100% - 96px)); margin-inline: auto; }

.top, footer { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.top { min-height: 72px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 9px; min-height: 44px; font-size: 23px; font-weight: 730; letter-spacing: -.055em; text-decoration: none; }
.accent { color: var(--accent); }
nav { display: flex; gap: clamp(8px, 1.8vw, 20px); }
nav a { display: inline-grid; place-items: center; min-width: 44px; min-height: 44px; padding-inline: 5px; text-decoration: none; font-size: 14px; }
nav a:hover { text-decoration: underline; text-underline-offset: 5px; }

.hero { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); align-items: center; gap: clamp(24px, 4.5vw, 68px); padding-block: clamp(48px, 6vw, 86px); }
.eyebrow, .step { font: 600 12px/1.5 var(--mono); letter-spacing: .08em; color: var(--muted); }
.eyebrow span, .step { color: var(--accent); }
.dot { display: inline-block; width: 7px; height: 7px; margin-right: 5px; border-radius: 50%; background: var(--accent); vertical-align: 1px; }
h1 { margin-block: 16px; font-size: clamp(39px, 5.2vw, 74px); letter-spacing: -.045em; line-height: 1.12; font-weight: 740; }
.lead { max-width: 31em; color: var(--muted); font-size: clamp(16px, 1.5vw, 18px); line-height: 1.8; }
.hero-link { display: inline-flex; gap: 16px; align-items: center; min-height: 44px; margin-top: 17px; padding: 0 14px; background: var(--ink); color: var(--paper); font-size: 14px; font-weight: 650; text-decoration: none; }
.hero-link:hover { background: #423c33; }
.hero-link span { color: #f5a581; font-size: 17px; }

.cycle { padding: 17px 18px 14px; background: var(--ink); color: var(--paper); }
.cycle figcaption { padding-bottom: 11px; border-bottom: 1px solid #5c574d; color: #e1d9cc; font-size: 13px; letter-spacing: .055em; }
.cycle svg { display: block; width: 100%; max-width: 385px; margin: 12px auto 0; }

.section { padding-block: 29px 40px; border-top: 1px solid var(--line); scroll-margin-top: 16px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px 20px; flex-wrap: wrap; margin-bottom: 23px; }
h2 { font-size: clamp(24px, 3vw, 34px); line-height: 1.26; letter-spacing: -.03em; }
.principles { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 25px; }
.principles li { border-top: 1px solid var(--line); padding-top: 14px; }
.principles h3 { margin-block: 8px 6px; font-size: 19px; line-height: 1.4; }
.principles li > p:last-child, .summary { font-size: 15px; line-height: 1.78; color: var(--muted); }

.products { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.product { display: flex; flex-direction: column; align-items: flex-start; padding: 19px 20px 17px; border: 1px solid var(--line); background: #fcfbf7; text-decoration: none; }
.domain { color: var(--accent); font-size: 13px; font-weight: 650; }
.product h3 { margin-block: 5px 7px; font-size: clamp(25px, 3.1vw, 32px); letter-spacing: -.04em; }
.summary { margin-bottom: 12px; }
.product-link { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; margin-top: auto; padding-top: 12px; border-top: 1px solid var(--line); color: var(--accent); font-size: 14px; font-weight: 660; }
.product-link span { font-size: 19px; line-height: 1; }
.product:hover, .product:focus-visible { border-color: var(--accent); }
.product:active { background: #f0e9de; }
.product:hover .product-link, .product:focus-visible .product-link { text-decoration: underline; text-underline-offset: 4px; }

footer { padding-block: 17px 23px; flex-wrap: wrap; gap: 7px 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer > span:last-of-type { font-family: var(--mono); }
.filings { flex-basis: 100%; display: flex; justify-content: center; flex-wrap: wrap; gap: 2px 20px; }
.filings a { display: inline-flex; align-items: center; min-height: 28px; text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 900px) {
  .shell { width: calc(100% - 56px); }
  .hero { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
  .cycle { padding-inline: 12px; }
  .principles { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .principles li { display: grid; grid-template-columns: 115px minmax(0, 1fr); gap: 4px 16px; }
  .principles h3 { margin: 0; }
  .principles .step { padding-top: 5px; }
  .principles li > p:last-child { grid-column: 2; }
}

@media (max-width: 700px) {
  .shell { width: calc(100% - 40px); }
  .top { min-height: 62px; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 23px; padding-block: 33px 26px; }
  .hero-link { margin-top: 12px; }
  .cycle { padding: 12px 12px 8px; }
  .cycle svg { max-width: 295px; margin-top: 7px; }
  .section { padding-block: 21px 27px; }
  .section-head { margin-bottom: 17px; }
}

@media (max-width: 500px) {
  .section-head { display: grid; }
  .principles li { display: block; padding-top: 11px; }
  .principles .step { padding-top: 0; }
  .principles h3 { margin-block: 4px; }
  .products { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .product { padding: 14px 15px; }
}