:root {
  color-scheme: light;
  --bg: #f7f8fa;
  --surface: #fff;
  --text: #1a1d21;
  --muted: #6b7280;
  --border: #e3e6eb;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --soft: #eef2ff;
  --soft-text: #4338ca;
  --shadow: 0 12px 35px rgb(17 24 39 / 6%);
}

.dark {
  color-scheme: dark;
  --bg: #101114;
  --surface: #181a1f;
  --text: #f5f6f8;
  --muted: #a3a9b4;
  --border: #2c2f36;
  --primary: #7770f5;
  --primary-hover: #8983fa;
  --soft: #242345;
  --soft-text: #c1bfff;
  --shadow: 0 14px 40px rgb(0 0 0 / 22%);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: "PingFang SC", "Microsoft YaHei", Inter, system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.shell { width: min(1152px, calc(100% - 48px)); margin-inline: auto; }

.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid color-mix(in srgb, var(--border) 65%, transparent); background: color-mix(in srgb, var(--bg) 84%, transparent); backdrop-filter: blur(18px); }
.nav { height: 64px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 12px; background: var(--primary); color: white; font-size: 12px; box-shadow: 0 6px 18px rgb(79 70 229 / 22%); }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 14px; letter-spacing: -.01em; }
.brand small { margin-top: 2px; color: var(--muted); font-size: 12px; }
.nav-actions { display: flex; align-items: center; gap: 8px; }
.theme-toggle { width: 36px; height: 36px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); color: var(--text); cursor: pointer; font-size: 17px; }

.button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; border-radius: 12px; padding: 0 24px; font-size: 14px; font-weight: 600; transition: transform .18s ease, background .18s ease, border-color .18s ease; }
.button:hover { transform: translateY(-1px); }
.button-small { min-height: 36px; padding-inline: 17px; }
.button-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 22px rgb(79 70 229 / 18%); }
.button-primary:hover { background: var(--primary-hover); }
.button-outline { border: 1px solid var(--border); background: var(--surface); }
.button-outline:hover { border-color: var(--primary); }
.button-light { background: #fff; color: #202126; }

.hero { display: flex; flex-direction: column; align-items: center; padding-block: 92px 70px; text-align: center; }
.eyebrow { display: inline-flex; align-items: center; border-radius: 999px; padding: 7px 12px; background: var(--soft); color: var(--soft-text); font-size: 12px; font-weight: 650; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 850px; margin: 25px 0 18px; font-size: clamp(42px, 6.2vw, 68px); line-height: 1.08; letter-spacing: -.055em; }
.hero-copy { max-width: 720px; margin-bottom: 0; color: var(--muted); font-size: 17px; line-height: 1.85; }
.hero-actions { display: flex; gap: 12px; margin-top: 34px; }
.supporting { margin: 18px 0 0; color: var(--muted); font-size: 12px; }
.steps { width: 100%; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 62px; padding: 16px; border: 1px solid var(--border); border-radius: 26px; background: var(--surface); box-shadow: var(--shadow); text-align: left; }
.step { min-height: 172px; padding: 18px; border: 1px solid var(--border); border-radius: 18px; background: var(--bg); }
.step > div { display: flex; align-items: center; justify-content: space-between; }
.step-icon, .feature > span { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 12px; background: var(--soft); color: var(--soft-text); font-weight: 700; }
.step code { color: var(--muted); font-size: 12px; }
.step h3 { margin: 17px 0 8px; font-size: 14px; }
.step p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.65; }

.section { padding-block: 82px; }
.section-heading { max-width: 720px; margin: 0 auto 46px; text-align: center; }
.section-heading h2, .team-copy h2, .cta h2 { margin-bottom: 16px; font-size: clamp(30px, 4vw, 43px); line-height: 1.18; letter-spacing: -.035em; }
.section-heading p, .team-copy p { margin-bottom: 0; color: var(--muted); line-height: 1.8; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { padding: 24px; border: 1px solid var(--border); border-radius: 20px; background: var(--surface); box-shadow: 0 4px 12px rgb(17 24 39 / 3%); transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.feature:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--primary) 50%, var(--border)); box-shadow: var(--shadow); }
.feature h3 { margin: 19px 0 10px; font-size: 16px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }

.team-section { display: grid; grid-template-columns: 1fr 1fr; gap: 62px; align-items: center; padding: 48px; border: 1px solid var(--border); border-radius: 28px; background: var(--surface); box-shadow: var(--shadow); }
.team-copy h2 { margin-top: 18px; }
.team-copy .button { margin-top: 27px; }
.workspaces { display: grid; gap: 12px; }
.workspaces article { display: flex; align-items: center; gap: 13px; padding: 15px; border: 1px solid var(--border); border-radius: 17px; background: var(--bg); }
.workspaces article > span { width: 40px; height: 40px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 12px; background: var(--soft); color: var(--soft-text); font-size: 14px; font-weight: 700; }
.workspaces article div { min-width: 0; flex: 1; }
.workspaces h3 { overflow: hidden; margin: 0 0 4px; font-size: 14px; text-overflow: ellipsis; white-space: nowrap; }
.workspaces p { overflow: hidden; margin: 0; color: var(--muted); font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.workspaces em { border-radius: 999px; padding: 3px 9px; background: #dcfce7; color: #15803d; font-size: 11px; font-style: normal; }

.cta { margin-block: 96px; padding: 68px 32px; border-radius: 28px; background: var(--primary); color: #fff; text-align: center; box-shadow: 0 20px 45px rgb(79 70 229 / 20%); }
.cta h2 { margin-bottom: 15px; }
.cta p { margin-bottom: 27px; color: rgb(255 255 255 / 80%); }

footer { border-top: 1px solid var(--border); }
.footer-inner { min-height: 92px; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--muted); font-size: 12px; }
.footer-brand { display: flex; align-items: center; gap: 8px; }
.footer-brand strong { color: var(--text); }
.brand-mark.mini { width: 22px; height: 22px; border-radius: 7px; font-size: 8px; }
.legal { display: flex; flex-direction: column; align-items: flex-end; gap: 5px; }
.legal a:hover { color: var(--text); }

@media (max-width: 820px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .features { grid-template-columns: repeat(2, 1fr); }
  .team-section { grid-template-columns: 1fr; gap: 38px; padding: 34px; }
}

@media (max-width: 560px) {
  .shell { width: min(100% - 30px, 1152px); }
  .brand small { display: none; }
  .hero { padding-block: 64px 48px; }
  h1 { font-size: 42px; }
  .hero-copy { font-size: 15px; line-height: 1.75; }
  .hero-actions { width: 100%; flex-direction: column; }
  .steps, .features { grid-template-columns: 1fr; }
  .section { padding-block: 62px; }
  .team-section { width: calc(100% - 30px); padding: 28px 22px; }
  .cta { margin-block: 72px; padding: 52px 22px; }
  .footer-inner { flex-direction: column; justify-content: center; padding-block: 26px; text-align: center; }
  .footer-brand { flex-wrap: wrap; justify-content: center; }
  .legal { align-items: center; }
}