/* ═══════════════════════════════════════════════
   标道 BIDAO · 品牌样式
   主色: #0C447C | 辅色: #185FA5 #378ADD | 强调: #BA7517
   ═══════════════════════════════════════════════ */

* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: -apple-system, "Microsoft YaHei", "PingFang SC", sans-serif;
  color: #2C2C2A; background: #fff; line-height: 1.7; font-size: 15px;
}

/* ── 导航 ── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
  border-bottom: 1px solid #E6F1FB;
}
.nav-inner {
  max-width: 1000px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px;
}
.nav-brand { display:flex; align-items:center; gap:10px; text-decoration:none; }
.nav-brand span { font-size:20px; font-weight:600; color:#0C447C; letter-spacing:2px; }
.nav-links { display:flex; gap:28px; }
.nav-links a { text-decoration:none; color:#5F5E5A; font-size:14px; }
.nav-links a:hover { color:#0C447C; }

/* ── 首屏 ── */
.hero {
  max-width: 1000px; margin: 0 auto; padding: 80px 24px 60px;
  display: flex; align-items: center; gap: 60px;
}
.hero-content { flex:1; }
.hero-title {
  font-size: 42px; font-weight: 600; color: #0C447C;
  letter-spacing: 6px; margin-bottom: 12px;
}
.hero-sub {
  font-size: 20px; color: #BA7517; letter-spacing: 2px; margin-bottom: 20px;
}
.hero-desc {
  font-size: 15px; color: #5F5E5A; line-height: 1.8; margin-bottom: 28px;
}
.hero-visual { flex-shrink: 0; }
.cta-btn {
  display: inline-block; background: #0C447C; color: #fff;
  padding: 14px 36px; border-radius: 10px; font-size: 16px; font-weight: 600;
  text-decoration: none; letter-spacing: 1px; transition: background 0.2s;
}
.cta-btn:hover { background: #185FA5; }

/* ── Section ── */
.section {
  max-width: 1000px; margin: 0 auto; padding: 80px 24px;
}
.section-alt { background: #F1EFE8; max-width: none; padding:80px 24px; }
.section-alt .section-title, .section-alt .pain-list {
  max-width: 1000px; margin-left: auto; margin-right: auto;
}
.section-title {
  font-size: 26px; font-weight: 600; color: #0C447C;
  text-align: center; margin-bottom: 40px;
}

/* ── 能力卡片 ── */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.feature-card {
  background: #F1EFE8; border-radius: 12px; padding: 32px 24px;
  text-align: center;
}
.feature-card h3 { font-size: 18px; color: #0C447C; margin: 16px 0 8px; }
.feature-card p { font-size: 14px; color: #5F5E5A; line-height: 1.7; }
.feature-icon { margin-bottom: 8px; }

/* ── 痛点 ── */
.pain-list { display: flex; flex-direction: column; gap: 14px; }
.pain-item {
  background: #fff; border-radius: 10px; padding: 18px 24px;
  font-size: 15px; color: #444;
}
.pain-item strong { color: #0C447C; }

/* ── CTA ── */
.cta-section { text-align: center; }

/* ── 产品页特色 ── */
.feature-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 12px 0; }
.fb-blue { background: #E6F1FB; border-radius: 10px; padding: 18px; }
.fb-amber { background: #FAEEDA; border-radius: 10px; padding: 18px; }
.fb-label { font-size: 12px; margin-bottom: 6px; }
.fb-blue .fb-label { color: #185FA5; }
.fb-amber .fb-label { color: #854F0B; }
.fb-copy { font-size: 15px; font-weight: 600; line-height: 1.6; }
.fb-blue .fb-copy { color: #0C447C; }
.fb-amber .fb-copy { color: #412402; }

/* ── 试用表单 ── */
.form-card {
  max-width: 500px; margin: 0 auto; background: #F1EFE8; border-radius: 12px;
  padding: 36px;
}
.form-card label { display: block; font-size: 13px; color: #5F5E5A; margin-bottom: 4px; margin-top: 16px; }
.form-card input, .form-card textarea, .form-card select {
  width: 100%; padding: 10px 14px; border: 1px solid #E6F1FB; border-radius: 8px;
  font-size: 14px; font-family: inherit;
}
.form-card input:focus, .form-card textarea:focus { outline: none; border-color: #185FA5; }
.form-card button {
  width: 100%; margin-top: 24px; padding: 14px; background: #0C447C; color: #fff;
  border: none; border-radius: 10px; font-size: 16px; font-weight: 600; cursor: pointer;
}
.form-card button:hover { background: #185FA5; }
.form-success {
  text-align: center; padding: 40px; display: none;
}
.form-success h3 { color: #0C447C; margin-bottom: 8px; }

/* ── Footer ── */
.footer { text-align: center; padding: 32px; background: #0C447C; color: #fff; font-size: 13px; opacity: 0.7; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero { flex-direction: column; padding: 60px 20px 40px; text-align: center; }
  .hero-title { font-size: 32px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid-2 { grid-template-columns: 1fr; }
  .nav-links { gap: 16px; }
}