:root {
  --ink: #182027;
  --muted: #68747b;
  --line: #dfe5e3;
  --paper: #f7f8f5;
  --panel: #eef2ef;
  --accent: #1f6d64;
  --accent-deep: #164d48;
  --warm: #d69a62;
  --white: #ffffff;
  --serif: Georgia, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); line-height: 1.7; }
a { color: inherit; text-decoration: none; }
.shell { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.site-header { border-bottom: 1px solid rgba(223, 229, 227, .8); background: rgba(247, 248, 245, .9); }
.nav-wrap, .footer-wrap { min-height: 78px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-weight: 760; letter-spacing: .18em; font-size: .86rem; }
.brand-mark { width: 31px; height: 31px; display: grid; place-items: center; color: var(--white); background: var(--accent); border-radius: 9px 9px 9px 2px; font-family: var(--serif); font-size: 1.15rem; letter-spacing: 0; }
.nav { display: flex; gap: 30px; color: var(--muted); font-size: .83rem; }
.nav a { transition: color .2s ease; }
.nav a:hover, .nav a:focus-visible { color: var(--accent); }
.hero { min-height: 610px; display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center; padding: 84px 0 94px; }
.eyebrow { margin: 0 0 19px; color: var(--accent); font-size: .7rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.status-dot { display: inline-block; width: 7px; height: 7px; margin-right: 8px; border-radius: 50%; background: var(--warm); vertical-align: 1px; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { letter-spacing: -.045em; line-height: 1.15; }
h1 { max-width: 680px; margin-bottom: 27px; font-size: clamp(3rem, 6vw, 5.5rem); font-weight: 640; }
h1 em { color: var(--accent); font-family: var(--serif); font-weight: 400; }
.lede { max-width: 530px; margin-bottom: 34px; color: var(--muted); font-size: 1.04rem; }
.hero-actions { display: flex; align-items: center; gap: 13px; }
.button { display: inline-flex; align-items: center; gap: 14px; min-height: 48px; padding: 0 20px; border-radius: 7px; font-size: .84rem; font-weight: 720; transition: transform .2s ease, background .2s ease; }
.button:hover, .button:focus-visible { transform: translateY(-2px); }
.button-primary { color: var(--white); background: var(--accent); }
.button-primary:hover, .button-primary:focus-visible { background: var(--accent-deep); }
.button-quiet { color: var(--muted); }
.hero-card { min-height: 390px; position: relative; overflow: hidden; border-radius: 24px; background: var(--panel); }
.hero-card::after { content: ""; position: absolute; inset: 14% 12%; border: 1px solid rgba(31, 109, 100, .14); border-radius: 50%; transform: rotate(-19deg); }
.orbital { position: absolute; border: 1px solid rgba(31, 109, 100, .2); border-radius: 50%; }
.orbital-one { width: 440px; height: 190px; top: 100px; left: -32px; transform: rotate(-28deg); }
.orbital-two { width: 310px; height: 480px; top: -39px; left: 110px; transform: rotate(35deg); border-color: rgba(214, 154, 98, .32); }
.signal-card { position: absolute; z-index: 1; left: 14%; bottom: 15%; width: 68%; padding: 25px 26px 23px; border: 1px solid rgba(255,255,255,.7); border-radius: 13px; background: rgba(255,255,255,.76); box-shadow: 0 16px 36px rgba(35, 58, 54, .1); }
.signal-label { display: block; margin-bottom: 15px; color: var(--muted); font-size: .62rem; font-weight: 800; letter-spacing: .16em; }
.signal-card strong { display: block; font-family: var(--serif); font-size: 1.65rem; font-weight: 400; }
.signal-line { display: block; width: 48px; height: 2px; margin: 19px 0 12px; background: var(--warm); }
.signal-card small { color: var(--muted); font-size: .76rem; }
.section { display: grid; grid-template-columns: 1fr 1fr; gap: 110px; padding: 104px 0 112px; border-top: 1px solid var(--line); }
.section-heading h2, .closing h2 { margin-bottom: 0; font-size: clamp(2.2rem, 4vw, 3.6rem); font-weight: 600; }
.section-body { align-self: end; max-width: 450px; color: var(--muted); font-size: 1rem; }
.section-body p + p { margin-top: 22px; }
.principles { padding: 102px 0 110px; color: var(--white); background: var(--accent-deep); }
.principles .eyebrow { color: #b3d1c9; }
.principles h2 { color: var(--white); }
.compact { margin-bottom: 46px; }
.principle-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.principle-card { min-height: 245px; padding: 28px 28px 25px; border: 1px solid rgba(255,255,255,.18); border-radius: 10px; background: rgba(255,255,255,.045); }
.principle-card.featured { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.3); }
.card-index { color: #b3d1c9; font-size: .75rem; letter-spacing: .12em; }
.principle-card h3 { margin: 58px 0 9px; font-size: 1.25rem; font-weight: 650; }
.principle-card p { margin-bottom: 0; color: #c6d8d3; font-size: .9rem; }
.closing { display: flex; align-items: end; justify-content: space-between; gap: 40px; padding: 120px 0 126px; }
.closing-note { max-width: 250px; margin-bottom: 7px; color: var(--muted); font-size: .88rem; }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); font-size: .73rem; }
.footer-wrap { min-height: 72px; }

@media (max-width: 780px) {
  .shell { width: min(100% - 36px, 560px); }
  .nav-wrap { min-height: 68px; }
  .nav { gap: 17px; font-size: .76rem; }
  .hero { display: block; min-height: auto; padding: 66px 0 76px; }
  h1 { font-size: clamp(2.8rem, 13vw, 4.4rem); }
  .lede { font-size: .98rem; }
  .hero-card { min-height: 300px; margin-top: 54px; }
  .section { display: block; padding: 76px 0 82px; }
  .section-body { margin-top: 34px; }
  .principles { padding: 78px 0 84px; }
  .principle-grid { grid-template-columns: 1fr; gap: 12px; }
  .principle-card { min-height: auto; padding: 24px; }
  .principle-card h3 { margin-top: 32px; }
  .closing { display: block; padding: 84px 0 90px; }
  .closing-note { margin-top: 31px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}