:root {
  --ink: #0a1526;
  --navy: #0b2a4a;
  --navy-2: #123a63;
  --cyan: #16c2ae;
  --cyan-dark: #0f9c8c;
  --bg: #ffffff;
  --soft: #f4f7fb;
  --line: #e3e9f2;
  --muted: #5c6b80;
  --warn: #c2410c;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(11, 42, 74, 0.09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 14px; letter-spacing: -0.01em; }
h1 { font-size: clamp(32px, 5vw, 56px); }
h2 { font-size: clamp(24px, 3vw, 36px); }
h3 { font-size: 18px; }
p { margin: 0 0 14px; color: var(--muted); }
.mono { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 72px 0; }
.section--soft { background: var(--soft); }
.section--navy { background: var(--navy); color: #fff; }
.section--navy p, .section--navy .muted { color: #b8c7d9; }

/* nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { display: flex; align-items: center; gap: 26px; height: 62px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; letter-spacing: 0.02em; }
.brand__mark {
  width: 26px; height: 26px; border-radius: 8px;
  background: linear-gradient(135deg, var(--navy), var(--cyan));
  display: grid; place-items: center; color: #fff; font-size: 13px;
}
.brand small { display: block; font-weight: 500; font-size: 11px; color: var(--muted); letter-spacing: 0.08em; }
.nav__links { display: flex; gap: 20px; margin-left: auto; font-size: 14px; color: var(--muted); }
.nav__links a:hover { color: var(--navy); }
.nav__cta { display: flex; gap: 10px; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border-radius: 10px; border: 1px solid transparent;
  font-size: 14px; font-weight: 600; cursor: pointer; transition: 0.18s easing;
  transition-property: background, color, border-color, transform;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--navy); color: #fff; }
.btn--primary:hover { background: var(--navy-2); }
.btn--ghost { border-color: var(--line); background: #fff; color: var(--navy); }
.btn--cyan { background: var(--cyan); color: #04231f; }
.btn--cyan:hover { background: #22d3bf; }
.btn--sm { padding: 8px 14px; font-size: 13px; }
.btn--block { width: 100%; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

/* hero */
.hero { padding: 84px 0 64px; background: radial-gradient(1200px 460px at 50% -120px, #e7f7f4 0%, #fff 62%); }
.hero__eyebrow { display: inline-block; font-size: 12px; letter-spacing: 0.16em; color: var(--cyan-dark); font-weight: 700; margin-bottom: 16px; }
.hero p.lead { font-size: 18px; max-width: 720px; }
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 26px; }

/* grid & cards */
.grid { display: grid; gap: 20px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow);
}
.card--flat { box-shadow: none; }
.card__tag { font-size: 12px; color: var(--cyan-dark); font-weight: 700; letter-spacing: 0.08em; }
.card h3 { margin-top: 8px; }
.card p:last-child { margin-bottom: 0; }
.card--product { display: flex; flex-direction: column; gap: 6px; }
.card--product .btn { margin-top: auto; align-self: flex-start; }
.card--soon { border-style: dashed; box-shadow: none; background: #fbfcfe; }

/* feature list */
.feature { display: flex; gap: 12px; align-items: flex-start; }
.feature__dot {
  flex: none; width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center;
  background: #e6f8f5; color: var(--cyan-dark); font-size: 13px; font-weight: 700;
}

/* steps */
.steps { counter-reset: step; display: grid; gap: 18px; }
.step { position: relative; padding-left: 56px; }
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 0; width: 36px; height: 36px; border-radius: 50%;
  background: var(--navy); color: #fff; display: grid; place-items: center; font-weight: 700;
}

/* pricing */
.price { display: flex; flex-direction: column; }
.price__amount { font-size: 34px; font-weight: 700; margin: 6px 0 4px; }
.price__amount small { font-size: 13px; color: var(--muted); font-weight: 500; }
.price ul { list-style: none; padding: 0; margin: 16px 0 20px; display: grid; gap: 9px; font-size: 14px; color: #33445b; }
.price li::before { content: "✓"; color: var(--cyan-dark); margin-right: 8px; font-weight: 700; }
.price--featured { border-color: var(--cyan); box-shadow: 0 22px 60px rgba(22, 194, 174, 0.16); }

/* code */
.code {
  background: #0b1424; color: #d7e3f4; border-radius: 12px; padding: 18px 20px;
  font-family: "SFMono-Regular", Consolas, monospace; font-size: 13px; line-height: 1.6;
  overflow-x: auto; white-space: pre; margin: 0 0 16px;
}
.code .k { color: #7dd3fc; }
.code .s { color: #86efac; }

/* table */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.table th { color: var(--muted); font-weight: 600; font-size: 13px; }

/* misc */
.badge { display: inline-block; padding: 3px 9px; border-radius: 999px; background: #e6f8f5; color: var(--cyan-dark); font-size: 12px; font-weight: 700; }
.kpi { display: flex; gap: 34px; flex-wrap: wrap; margin-top: 28px; }
.kpi strong { display: block; font-size: 26px; color: var(--navy); }
.kpi span { font-size: 13px; color: var(--muted); }
.note { font-size: 13px; color: var(--muted); }
.footer { border-top: 1px solid var(--line); padding: 40px 0; background: #fff; }
.footer__grid { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; font-size: 14px; }
.footer a { color: var(--muted); display: block; margin-bottom: 6px; }
.footer a:hover { color: var(--navy); }
.form { display: grid; gap: 12px; }
.form label { font-size: 13px; font-weight: 600; color: #33445b; }
.form input, .form select {
  width: 100%; padding: 11px 12px; border: 1px solid var(--line); border-radius: 9px;
  font-size: 14px; font-family: inherit; outline: none; background: #fff;
}
.form input:focus, .form select:focus { border-color: var(--cyan); }
.notice { padding: 10px 14px; border-radius: 9px; font-size: 13px; background: #fff7ed; color: var(--warn); border: 1px solid #fed7aa; }
.notice--ok { background: #ecfdf5; color: #047857; border-color: #a7f3d0; }
.hidden { display: none !important; }

@media (max-width: 860px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .nav__links { display: none; }
  .hero { padding: 56px 0 40px; }
  .section { padding: 52px 0; }
}