:root {
  --bg: #f5f1e8;
  --paper: #fffdf9;
  --ink: #1f2933;
  --muted: #66788a;
  --accent: #c24d2c;
  --accent-dark: #98381d;
  --line: #e6dccf;
  --shadow: 0 18px 45px rgba(31, 41, 51, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(194, 77, 44, 0.12), transparent 30%),
    linear-gradient(180deg, #fcfaf6 0%, var(--bg) 100%);
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.narrow {
  width: min(760px, calc(100% - 32px));
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(252, 250, 246, 0.85);
  border-bottom: 1px solid rgba(230, 220, 207, 0.9);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}

.nav nav {
  display: flex;
  gap: 22px;
}

.brand {
  font-size: 24px;
  font-weight: 700;
}

.hero,
.section {
  padding: 72px 0;
}

.hero-grid,
.feature-grid {
  display: grid;
  gap: 24px;
}

.hero-grid {
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 14px;
  font-weight: 700;
}

h1,
h2,
h3,
p,
ul {
  margin-top: 0;
}

h1 {
  font-size: clamp(38px, 7vw, 62px);
  line-height: 1.05;
  margin-bottom: 16px;
}

.lead {
  font-size: 18px;
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 28px;
}

.button {
  display: inline-block;
  padding: 14px 24px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.button:hover {
  background: var(--accent-dark);
}

.card,
.feature-card,
.contact-form {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.feature-card p,
.card p,
.contact-form {
  color: var(--muted);
}

.contact-form {
  display: grid;
  gap: 12px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  font: inherit;
  background: #fff;
}

.site-footer {
  padding: 28px 0 48px;
  color: var(--muted);
}

@media (max-width: 840px) {
  .hero-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    flex-direction: column;
    gap: 12px;
  }
}