:root {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --text: #1b1e27;
  --muted: #64748b;
  --primary: #2563eb; /* 企业蓝 */
  --accent: #0bb68d;  /* 品牌点缀 */
  --border: #e2e8f0;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #f9fafb 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.65;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}
.brand {
  display: flex; align-items: center; gap: 10px; justify-content: space-between;
  padding: 20px 0;
}
.brand-left { display: flex; align-items: center; gap: 10px; }
.brand .logo img { width: 56px; height: 56px; display: block; background: #ffffff; border-radius: 8px; padding: 4px; }
.brand .name { font-weight: 800; letter-spacing: 0.6px; font-size: 20px; }
.brand .slogan { color: var(--muted); font-size: 14px; }

nav {
  display: flex; gap: 18px; padding: 8px 0 16px; flex-wrap: wrap; align-items: center;
}
nav a {
  color: var(--text); text-decoration: none; padding: 10px 14px; border-radius: 10px;
  border: 1px solid transparent; transition: all .2s ease;
}
nav a.active { color: var(--primary); background: #eff6ff; border-color: #dbeafe; }
nav a:hover { border-color: var(--border); background: #f8fafc; }

.header-banner {
  position: relative; margin: 8px 0 16px; border-radius: 16px; overflow: hidden;
  border: 1px solid var(--border);
}
.header-banner img { width: 100%; height: 240px; object-fit: cover; display: block; }
.header-banner .overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(255,255,255,0.55) 0%, rgba(255,255,255,0.25) 40%, rgba(255,255,255,0) 100%); }
.header-banner .headline { position: absolute; left: 24px; bottom: 18px; color: var(--text); font-size: 28px; font-weight: 700; }

.hero { padding: 64px 0 24px; }
.hero .eyebrow { color: var(--primary); font-weight: 600; letter-spacing: 1px; }
.hero h1 { margin: 12px 0 14px; font-size: 40px; line-height: 1.22; }
.hero p { color: var(--muted); margin: 0; font-size: 16px; }
.hero .cta {
  margin-top: 22px; display: inline-block; padding: 12px 18px; border-radius: 12px;
  color: #fff; background: var(--primary);
  text-decoration: none; font-weight: 600; box-shadow: 0 8px 20px rgba(37,99,235,0.25);
}

section { padding: 40px 0; border-top: 1px solid var(--border); }
section h2 { font-size: 22px; margin: 0 0 8px; }
section .sub { color: var(--muted); margin-top: 0; }

.grid { display: grid; gap: 24px; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 920px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid { grid-template-columns: 1fr; } }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
}
.card .thumb {
  width: 100%; height: 180px; border-radius: 12px; margin-bottom: 12px;
  object-fit: cover; border: 1px solid var(--border);
}
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); }
.badge { display: inline-block; padding: 4px 8px; border: 1px solid #dbeafe; border-radius: 999px; font-size: 12px; color: var(--primary); background: #eff6ff; }

footer { margin-top: 30px; border-top: 1px solid var(--border); color: var(--muted); background: var(--surface); }
footer .foot {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 18px 0;
}
footer .foot .center { flex: 1; text-align: center; }
footer a { color: var(--muted); }
footer .beian { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); justify-content: center; }
footer .beian img, footer .beian svg { width: 16px; height: 16px; display: inline-block; }

.lead { font-size: 15px; color: var(--muted); }
.sub strong { font-weight: 700; }
.kpi { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 12px; }
.kpi .pill { border: 1px dashed var(--border); border-radius: 999px; padding: 6px 10px; font-size: 13px; color: var(--muted); }

.contact-form { display: grid; gap: 12px; max-width: 560px; }
.contact-form label { font-size: 13px; color: var(--muted); }
.contact-form input, .contact-form textarea {
  width: 100%; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text);
}
.contact-form input:focus, .contact-form textarea:focus { outline: none; border-color: #93c5fd; box-shadow: 0 0 0 3px rgba(147, 197, 253, 0.35); }
.contact-form button {
  padding: 12px 16px; border-radius: 12px; border: 1px solid var(--border); color: #fff;
  background: var(--primary);
}

.hero-banner {
  width: 100%; height: 380px; border-radius: 16px; border: 1px solid var(--border);
  object-fit: cover; box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

.muted { color: var(--muted); }
.nowrap { white-space: nowrap; }