:root {
  --primary: #43553f;
  --primary-deep: #2f3d2c;
  --accent: #c6d93b;
  --accent-soft: #eef3c4;
  --bg: #f6f7f2;
  --surface: #ffffff;
  --ink: #1e241c;
  --muted: #5f6b59;
  --line: #dfe4d8;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 18px 48px rgba(30, 36, 28, 0.08);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-deep); }

h1, h2, h3 { line-height: 1.25; margin: 0 0 0.6em; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 4.2vw, 3.2rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.15rem); font-weight: 750; }
h3 { font-size: 1.08rem; font-weight: 700; }

p { margin: 0 0 1em; }

.container {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

/* ── 顶部导航 ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(246, 247, 242, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 74px;
}

.brand { display: flex; align-items: center; }
.brand-logo { height: 46px; width: auto; }

.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav a {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--muted);
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.site-nav a:hover { color: var(--ink); border-bottom-color: var(--accent); }

.nav-toggle {
  display: none;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

/* ── Hero：左文案 / 右视觉 ── */
.hero { padding: clamp(48px, 7vw, 92px) 0 clamp(52px, 8vw, 104px); }

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
}

.eyebrow {
  margin: 0 0 18px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--muted);
}

.lede {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 34em;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 26px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  transition: transform 0.16s ease, background 0.16s ease, color 0.16s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-deep); color: #fff; }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

.hero-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-size: 0.9rem;
  color: var(--muted);
}
.hero-points li { position: relative; padding-left: 18px; }
.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.hero-visual {
  position: relative;
  min-height: 420px;
  border-radius: 28px;
  background:
    radial-gradient(circle at 72% 18%, rgba(198, 217, 59, 0.42), transparent 42%),
    linear-gradient(150deg, #4d6048 0%, var(--primary) 46%, var(--primary-deep) 100%);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.visual-ring {
  position: absolute;
  width: 300px;
  height: 300px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  top: 36px;
  right: -60px;
}

.visual-ring::after {
  content: "";
  position: absolute;
  inset: 52px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
}

.visual-mark {
  position: absolute;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%);
  width: 172px;
  height: 172px;
  border-radius: 26px;
  overflow: hidden;
  box-shadow: 0 22px 54px rgba(0, 0, 0, 0.28);
}

.visual-card {
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 28px;
  padding: 18px 20px;
  border-radius: var(--radius-sm);
  background: rgba(246, 247, 242, 0.96);
  display: grid;
  gap: 3px;
}
.visual-card-label { font-size: 0.72rem; letter-spacing: 0.12em; color: var(--muted); }
.visual-card strong { font-size: 0.98rem; }
.visual-card-note { font-size: 0.78rem; color: var(--muted); }

/* ── 页脚 ── */
.site-footer {
  margin-top: clamp(56px, 8vw, 96px);
  padding: 34px 0 42px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 28px;
  font-size: 0.86rem;
  color: var(--muted);
}
.footer-inner p { margin: 0; }

/* ── 移动端 ── */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { min-height: 360px; }
}

@media (max-width: 768px) {
  .container { width: calc(100% - 32px); }
  .header-inner { min-height: 64px; }
  .brand-logo { height: 36px; }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 14px 16px 18px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 32px rgba(30, 36, 28, 0.08);
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { width: 100%; padding: 10px 0; }
  .hero { padding-top: 36px; }
  .hero-visual { min-height: 320px; }
  .visual-mark { width: 132px; height: 132px; }
  .visual-card { left: 18px; right: 18px; bottom: 18px; padding: 14px 16px; }
  .footer-inner { flex-direction: column; }
}