:root {
  /* 品牌 token —— 逐项取自 webdesign.retea7.com（uemo 建站器）实测样式 */
  --brand-cyan: #A9EDFE;        /* banner 主色（浅青） */
  --brand-navy: #0c447c;        /* 青底上的深藏青（logo/深字） */
  --accent-green: #34cd8b;      /* 导航 hover/激活色（webdesign 实测） */
  --accent-yellow: #f6f04c;     /* 胶囊按钮强调黄 */
  --footer-bg: #000000;         /* 页脚黑底 */
  --text: #333333;
  --muted: #666666;
  --light: #999999;
  --line: #f0f0f0;
  --maxw: 1180px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text); line-height: 1.7; background: #fff;
}
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }
ul { list-style: none; }

/* ===== 按钮（webdesign 全站为胶囊形） ===== */
.btn {
  display: inline-block; border-radius: 999px; white-space: nowrap;
  font-size: 14px; font-weight: 600; padding: 11px 30px;
  transition: all .2s ease;
}
.btn-primary { background: var(--accent-yellow); color: #333; }
.btn-primary:hover { filter: brightness(.96); transform: translateY(-1px); }
.btn-sm { padding: 8px 22px; font-size: 13px; }

/* ===== 顶部导航：透明叠 banner，滚动后白底（复刻 #header / #header.mini） ===== */
#site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 9999;
  transition: all .3s ease-out;
}
#site-header.mini {
  background: #fff;
  box-shadow: 0 2px 5px rgba(57, 47, 63, .06);
}
.nav-inner { display: flex; align-items: center; height: 60px; gap: 24px; }
.brand { display: flex; align-items: center; }
.brand img { display: block; height: 40px; width: auto; }
nav { flex: 1; }
#nav { display: flex; justify-content: center; }
#nav a {
  display: block; font-size: 15px; line-height: 60px; padding: 0 26px;
  color: #fff; text-shadow: 0 1px 3px rgba(0, 0, 0, .12);
  transition: color .3s ease-out;
}
#nav a:hover { color: var(--accent-green); }
#site-header.mini #nav a { color: var(--muted); text-shadow: none; }
#site-header.mini #nav a:hover { color: var(--accent-green); }

/* ===== 主视觉 banner：青底 + 左白字 + 黄胶囊按钮 + 装饰形状 ===== */
.hero {
  position: relative; overflow: hidden;
  background: var(--brand-cyan);
  padding: 150px 0 110px;
}
.hero-inner {
  position: relative; z-index: 2;
  display: flex; align-items: center; gap: 48px;
}
.hero-text { flex: 1; }
.hero h1 {
  font-size: 56px; font-weight: 800; line-height: 1.15;
  color: #fff; letter-spacing: 1px; margin-bottom: 18px;
  text-shadow: 0 2px 6px rgba(12, 68, 124, .18);
}
.hero p {
  font-size: 16px; color: #fff; opacity: .92;
  max-width: 520px; margin-bottom: 34px;
}
.hero-media { flex: 0 0 42%; }
.hero-media img { display: block; border-radius: 10px; box-shadow: 0 20px 50px rgba(12, 68, 124, .22); }

/* 装饰：半透明圆角方块（webdesign banner 漂浮元素） */
.shape {
  position: absolute; background: rgba(255, 255, 255, .16);
  border-radius: 22%; z-index: 1;
}
.shape-1 { width: 110px; height: 110px; top: 60px; right: 8%; transform: rotate(18deg); }
.shape-2 { width: 70px; height: 70px; top: 40px; right: 24%; transform: rotate(-12deg); }
.shape-3 { width: 90px; height: 90px; bottom: 50px; left: -20px; transform: rotate(24deg); }
.shape-4 { width: 54px; height: 54px; bottom: 110px; left: 12%; transform: rotate(-18deg); }

/* ===== 数据条：四个大数字 ===== */
.stats { background: #fff; border-bottom: 1px solid var(--line); }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  padding: 44px 24px; text-align: center; gap: 20px;
}
.stat-number {
  font-size: 40px; font-weight: 800; color: var(--text); line-height: 1.2;
}
.stat-label { font-size: 13px; color: var(--light); margin-top: 4px; }

/* ===== 区块标题（居中）+ 服务亮点卡片 ===== */
.features { padding: 90px 0 100px; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head h2 { font-size: 26px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.section-head p { font-size: 14px; color: var(--light); }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.feature-card {
  background: #fff; border-radius: 8px; padding: 36px 30px;
  box-shadow: 0 5px 20px rgba(57, 47, 63, .07);
  transition: all .25s ease;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(57, 47, 63, .12); }
.feature-card h3 { font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--muted); }

/* ===== 页脚（黑底，复刻 webdesign） ===== */
#site-footer { background: var(--footer-bg); padding: 64px 0 24px; }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col a, .footer-col p {
  display: block; color: var(--light); font-size: 13px; margin-bottom: 9px;
  transition: color .2s;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid #222; margin-top: 44px; padding-top: 20px;
  color: var(--muted); font-size: 12px; text-align: center;
}

/* ===== 响应式 ===== */
@media (max-width: 860px) {
  #nav { display: none; }
  .hero { padding: 120px 0 80px; }
  .hero h1 { font-size: 38px; }
  .hero-inner { flex-direction: column; align-items: flex-start; }
  .hero-media { flex: none; width: 100%; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .feature-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}