:root {
  --brand: #059669; --brand-dark: #047857; --ink: #0f172a; --muted: #64748b;
  --bg: #f8fafc; --card: #ffffff; --line: #e2e8f0;
  --code-bg: #0f172a; --code-ink: #e2e8f0;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif; color: var(--ink); background: var(--bg); line-height: 1.7; }
a { color: var(--brand); text-decoration: none; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

.nav { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav-inner { max-width: 1080px; margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; color: var(--ink); }
.brand-logo { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 9px; background: linear-gradient(135deg, #10b981, #047857); color: #fff; font-weight: 800; }
.nav-links { display: flex; gap: 26px; font-size: 15px; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--ink); }

.hero { padding: 96px 0 84px; text-align: center; background: radial-gradient(1200px 500px at 50% -100px, rgba(16,185,129,.12), transparent); }
.hero h1 { font-size: 46px; line-height: 1.25; letter-spacing: -1px; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero p.tagline { margin: 18px auto 0; max-width: 640px; font-size: 19px; color: var(--muted); }
.hero-actions { margin-top: 34px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 26px; border-radius: 10px; font-size: 16px; font-weight: 600; border: 1px solid transparent; transition: all .15s; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-outline { border-color: var(--line); color: var(--ink); background: var(--card); }
.btn-outline:hover { border-color: var(--brand); color: var(--brand); }
.hero-meta { margin-top: 26px; font-size: 14px; color: var(--muted); }

section.block { padding: 72px 0; }
section.block.alt { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.block h2 { font-size: 30px; text-align: center; }
.block .sub { text-align: center; color: var(--muted); margin-top: 10px; margin-bottom: 44px; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 26px; }
.feature .icon { width: 42px; height: 42px; border-radius: 10px; display: flex; align-items: center; justify-content: center; background: rgba(16,185,129,.1); color: var(--brand); margin-bottom: 14px; }
.feature h3 { font-size: 17px; margin-bottom: 8px; }
.feature p { font-size: 14.5px; color: var(--muted); }

.steps { max-width: 760px; margin: 0 auto; }
.step { display: flex; gap: 18px; padding: 18px 0; border-bottom: 1px dashed var(--line); }
.step:last-child { border-bottom: none; }
.step .no { flex-shrink: 0; width: 34px; height: 34px; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.step h3 { font-size: 16px; }
.step p { font-size: 14.5px; color: var(--muted); margin-top: 4px; }
code.inline { background: rgba(16,185,129,.08); color: var(--brand-dark); padding: 2px 7px; border-radius: 5px; font-size: 13.5px; font-family: ui-monospace, "SF Mono", Menlo, monospace; }

.footer { padding: 40px 0 56px; color: var(--muted); font-size: 14px; text-align: center; }
.footer .links { display: flex; gap: 22px; justify-content: center; margin-bottom: 14px; }

@media (max-width: 840px) {
  .grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 34px; }
  .nav-links { display: none; }
}