/* ========================================
   壹本信息咨询 - 全站公共样式
   ======================================== */

:root {
  --primary: #1a3a6b;
  --primary-light: #2563eb;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --bg: #f8fafc;
  --white: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(26, 58, 107, 0.08);
  --shadow-hover: 0 8px 32px rgba(26, 58, 107, 0.16);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: color 0.2s; }
a:hover { color: var(--primary-light); }

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

ul { list-style: none; }

/* ---- 导航栏 ---- */
.navbar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: 64px;
  gap: 40px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--primary);
  flex-shrink: 0;
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
  font-weight: 900;
}

.nav-links {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

.nav-links a {
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  color: var(--text-light);
  transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--primary);
  color: var(--white);
}

.nav-cta {
  background: var(--accent) !important;
  color: white !important;
  font-weight: 600;
  padding: 8px 18px !important;
}

.nav-cta:hover { background: var(--accent-light) !important; color: white !important; }
.nav-ai { background: linear-gradient(135deg, #6366F1, #8B5CF6) !important; color: white !important; font-weight: 600; padding: 8px 18px !important; border-radius: 8px; }
.nav-ai:hover { opacity: 0.9; color: white !important; }

/* ---- 底部 ---- */
.footer {
  background: var(--primary);
  color: rgba(255,255,255,0.75);
  padding: 48px 24px 24px;
  margin-top: 80px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: white;
  margin-bottom: 8px;
}

.footer-desc { font-size: 0.88rem; line-height: 1.6; max-width: 400px; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  margin-bottom: 24px;
}

.footer-col h4 {
  color: white;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 0.88rem; }
.footer-col ul li a:hover { color: white; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
}

/* ---- 通用容器 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  text-align: center;
  margin-bottom: 12px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  font-size: 1.05rem;
  margin-bottom: 48px;
}

/* ---- 按钮 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
  color: white;
}

.btn-accent {
  background: var(--accent);
  color: white;
}

.btn-accent:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
  color: white;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

.btn-lg { padding: 15px 36px; font-size: 1.05rem; border-radius: 12px; }

/* ---- 卡片 ---- */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  transition: all 0.3s;
  border: 1px solid var(--border);
}

.card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

/* ---- 标签 ---- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
}

.badge-blue { background: #dbeafe; color: #1d4ed8; }
.badge-green { background: #dcfce7; color: #16a34a; }
.badge-orange { background: #ffedd5; color: #c2410c; }
.badge-purple { background: #ede9fe; color: #7c3aed; }

/* ---- 工具类 ---- */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.text-light { color: var(--text-light); }
.fw-700 { font-weight: 700; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-40 { margin-bottom: 40px; }

/* ---- 响应式 ---- */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .section { padding: 48px 0; }
  .section-title { font-size: 1.6rem; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}