/* biggene.cn 门户 — 单页静态样式，无构建步骤 */
:root {
  --ink: #10201b;
  --ink-soft: #47605a;
  --brand: #0e7a5f;
  --brand-dark: #0a5c48;
  --bg: #f6faf8;
  --card: #ffffff;
  --line: #dceae4;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶栏 ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(246, 250, 248, .88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; letter-spacing: .2px; }
.logo {
  width: 26px; height: 26px; border-radius: 7px; background: var(--brand);
  background-image: repeating-linear-gradient(180deg,
    transparent 0 5px, rgba(255,255,255,.85) 5px 7px, transparent 7px 12px);
}
.nav-cta {
  color: var(--brand); font-weight: 600; text-decoration: none;
  border: 1px solid var(--brand); border-radius: 999px; padding: 6px 16px;
}
.nav-cta:hover { background: var(--brand); color: #fff; }

/* ---------- Hero ---------- */
.hero { padding: 88px 0 72px; background:
  radial-gradient(1100px 420px at 85% -10%, rgba(14,122,95,.14), transparent 60%),
  radial-gradient(700px 300px at 8% 0%, rgba(14,122,95,.08), transparent 55%);
}
.eyebrow { color: var(--brand); font-weight: 600; letter-spacing: .12em; text-transform: uppercase; margin: 0 0 14px; font-size: 13px; }
.hero h1 { font-size: clamp(30px, 5vw, 50px); line-height: 1.22; margin: 0 0 18px; letter-spacing: .5px; }
.hero .dot { color: var(--brand); margin: 0 6px; }
.lede { font-size: clamp(15px, 2vw, 18px); color: var(--ink-soft); max-width: 46em; margin: 0 0 30px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 600;
  border-radius: 10px; padding: 12px 24px; border: 1px solid transparent;
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 6px 18px rgba(14,122,95,.28); }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { border-color: var(--brand); color: var(--brand); background: transparent; }
.btn-ghost:hover { background: rgba(14,122,95,.08); }
.btn-lg { font-size: 17px; padding: 14px 30px; }
.hero-note { margin-top: 18px; color: var(--ink-soft); font-size: 14px; }
.hero-note code { background: #e7f2ee; border-radius: 6px; padding: 2px 8px; color: var(--brand-dark); }

/* ---------- 能力卡片 ---------- */
.features { padding: 64px 0; }
.features h2, .entry h2 { font-size: clamp(22px, 3vw, 30px); margin: 0 0 28px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 22px 22px 18px; box-shadow: 0 2px 10px rgba(16,32,27,.05);
}
.card h3 { margin: 0 0 8px; font-size: 17px; color: var(--brand-dark); }
.card p { margin: 0; color: var(--ink-soft); font-size: 14.5px; }

/* ---------- 入口区 ---------- */
.entry { padding: 56px 0 72px; }
.entry-inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px;
  background: linear-gradient(120deg, #0e7a5f, #0a5c48);
  color: #eafff7; border-radius: 18px; padding: 36px 40px;
}
.entry-inner h2 { margin: 0 0 10px; color: #fff; }
.entry-inner p { margin: 0; max-width: 34em; color: rgba(234,255,247,.85); }
.entry .btn-primary { background: #fff; color: var(--brand-dark); box-shadow: 0 6px 18px rgba(0,0,0,.22); }
.entry .btn-primary:hover { background: #eafff7; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); padding: 22px 0; background: #eef6f2; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; color: var(--ink-soft); font-size: 13.5px; }
.footer a { color: var(--brand-dark); }

@media (max-width: 640px) {
  .hero { padding: 56px 0 48px; }
  .entry-inner { padding: 28px 24px; }
}