/* ====== 关于我们 - 单页样式 ====== */

/* ---------- Banner ---------- */
.ab-banner {
  position: relative;
  min-height: 480px;
  background: radial-gradient(ellipse at 70% 30%, #1a3a5c 0%, #0f2440 50%, #081428 100%);
  display: flex; align-items: center; overflow: hidden;
}
.ab-banner::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 60px 60px;
}
.ab-banner .ab-banner-glow {
  position: absolute; width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56,189,248,0.12) 0%, transparent 70%);
  top: -150px; left: -120px; pointer-events: none;
}
.ab-banner .container { position: relative; z-index: 2; }
.ab-banner-text { max-width: 720px; }
.ab-banner-text .ab-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 18px; border-radius: 20px;
  font-size: 13px; font-weight: 600; color: #38bdf8;
  background: rgba(56,189,248,0.1);
  border: 1px solid rgba(56,189,248,0.18);
  margin-bottom: 20px;
}
.ab-banner-text h1 { font-size: 42px; font-weight: 800; color: #fff; line-height: 1.25; margin-bottom: 16px; }
.ab-banner-text h1 span { background: linear-gradient(135deg, #38bdf8, #a78bfa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.ab-banner-text p { font-size: 17px; color: rgba(255,255,255,0.65); line-height: 1.75; margin-bottom: 0; max-width: 600px; }

/* ---------- 面包屑 ---------- */
.ab-breadcrumb {
  background: #f8fafc; padding: 12px 0;
  border-bottom: 1px solid #e2e8f0;
}
.ab-breadcrumb ol { display: flex; list-style: none; margin: 0; padding: 0; font-size: 13px; color: #64748b; }
.ab-breadcrumb ol li + li::before { content: "/"; margin: 0 8px; color: #94a3b8; }
.ab-breadcrumb ol li a { color: #475569; text-decoration: none; }
.ab-breadcrumb ol li a:hover { color: #2563eb; }

/* ---------- 通用 Section ---------- */
.ab-section { padding: 80px 0; }
.ab-section.alt { background: #f8fafc; }
.ab-section-head { text-align: center; margin-bottom: 52px; }
.ab-section-head .ab-subtitle { font-size: 13px; font-weight: 700; letter-spacing: 2px; color: #2563eb; text-transform: uppercase; margin-bottom: 10px; }
.ab-section-head h2 { font-size: 32px; font-weight: 800; color: #0f172a; margin-bottom: 12px; }
.ab-section-head p { font-size: 15px; color: #64748b; max-width: 600px; margin: 0 auto; line-height: 1.7; }

/* ---------- 公司简介 ---------- */
.ab-intro { padding-bottom: 0; }
.ab-intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.ab-intro-text h2 { font-size: 30px; font-weight: 800; color: #0f172a; margin-bottom: 20px; }
.ab-intro-text p { font-size: 15px; color: #475569; line-height: 1.85; margin-bottom: 16px; }
.ab-intro-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 36px; }
.ab-intro-stats .ab-stat-item { text-align: center; padding: 20px 10px; border-radius: 12px; background: #f8fafc; border: 1px solid #e2e8f0; transition: all 0.3s; }
.ab-intro-stats .ab-stat-item:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.06); border-color: #c7d2fe; }
.ab-intro-stats .ab-stat-num { font-size: 32px; font-weight: 800; background: linear-gradient(135deg, #2563eb, #7c3aed); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.ab-intro-stats .ab-stat-label { font-size: 13px; color: #64748b; margin-top: 6px; }
.ab-intro-visual { position: relative; }
.ab-intro-visual .ab-intro-img {
  width: 100%; border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.1);
}
.ab-intro-visual::after {
  content: ""; position: absolute; inset: -12px;
  border: 2px dashed #c7d2fe; border-radius: 22px;
  z-index: -1;
}

/* ---------- 发展历程时间线 ---------- */
.ab-timeline { position: relative; }
.ab-timeline::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 50%;
  width: 2px; background: linear-gradient(to bottom, transparent, #3b82f6, #8b5cf6, transparent);
  transform: translateX(-50%);
}
.ab-timeline-item { display: flex; align-items: flex-start; margin-bottom: 48px; position: relative; }
.ab-timeline-item:nth-child(odd) { flex-direction: row; padding-right: calc(50% + 40px); text-align: right; }
.ab-timeline-item:nth-child(even) { flex-direction: row-reverse; padding-left: calc(50% + 40px); }
.ab-timeline-item::before {
  content: ""; position: absolute; top: 8px; left: 50%;
  width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 3px solid #3b82f6;
  transform: translateX(-50%); z-index: 2;
  box-shadow: 0 0 0 4px rgba(59,130,246,0.15);
}
.ab-timeline-year {
  font-size: 20px; font-weight: 800; color: #2563eb;
  margin-bottom: 6px; white-space: nowrap;
}
.ab-timeline-title { font-size: 17px; font-weight: 700; color: #0f172a; margin-bottom: 6px; }
.ab-timeline-desc { font-size: 14px; color: #64748b; line-height: 1.65; }

/* ---------- 核心能力 ---------- */
.ab-capabilities { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.ab-cap-card {
  padding: 36px 24px; border-radius: 16px; text-align: center;
  background: #fff; border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}
.ab-cap-card:hover { transform: translateY(-6px); box-shadow: 0 16px 48px rgba(0,0,0,0.08); border-color: #93c5fd; }
.ab-cap-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 64px; height: 64px; border-radius: 16px;
  background: linear-gradient(135deg, #dbeafe, #ede9fe);
  margin-bottom: 20px; font-size: 28px;
}
.ab-cap-title { font-size: 17px; font-weight: 700; color: #0f172a; margin-bottom: 10px; }
.ab-cap-desc { font-size: 13px; color: #64748b; line-height: 1.7; }

/* ---------- 主营业务 ---------- */
.ab-services { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ab-service-card {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 28px 24px; border-radius: 14px;
  background: #fff; border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}
.ab-service-card:hover { transform: translateY(-4px); box-shadow: 0 12px 36px rgba(0,0,0,0.06); border-color: #93c5fd; }
.ab-service-icon {
  flex-shrink: 0; width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  background: linear-gradient(135deg, #dbeafe, #ede9fe);
}
.ab-service-info h4 { font-size: 16px; font-weight: 700; color: #0f172a; margin-bottom: 6px; }
.ab-service-info p { font-size: 13px; color: #64748b; line-height: 1.6; margin: 0; }

/* ---------- 为什么选择我们 ---------- */
.ab-why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.ab-why-card {
  padding: 32px 24px; border-radius: 14px; text-align: center;
  background: #fff; border: 1px solid #e2e8f0;
  transition: all 0.3s;
}
.ab-why-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.06); border-color: #c7d2fe; }
.ab-why-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; border-radius: 50%;
  background: linear-gradient(135deg, #dbeafe, #e0e7ff);
  margin-bottom: 16px; font-size: 24px;
}
.ab-why-title { font-size: 16px; font-weight: 700; color: #0f172a; margin-bottom: 8px; }
.ab-why-desc { font-size: 13px; color: #64748b; line-height: 1.6; }

/* ---------- FAQ ---------- */
.ab-faq-list { max-width: 800px; margin: 0 auto; }
.ab-faq-item {
  border: 1px solid #e2e8f0; border-radius: 12px;
  margin-bottom: 12px; overflow: hidden; background: #fff;
  transition: all 0.2s;
}
.ab-faq-item:hover { border-color: #93c5fd; }
.ab-faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; border: none; background: none;
  font-size: 15px; font-weight: 700; color: #0f172a;
  cursor: pointer; text-align: left; gap: 16px;
}
.ab-faq-q .ab-faq-icon { flex-shrink: 0; font-size: 13px; color: #94a3b8; transition: transform 0.3s; }
.ab-faq-item.open .ab-faq-q .ab-faq-icon { transform: rotate(45deg); color: #2563eb; }
.ab-faq-a { display: none; padding: 0 24px 20px; }
.ab-faq-item.open .ab-faq-a { display: block; }
.ab-faq-a p { font-size: 14px; color: #475569; line-height: 1.75; margin: 0; }

/* ---------- 联系信息 ---------- */
.ab-contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.ab-contact-info { display: flex; flex-direction: column; gap: 20px; }
.ab-contact-card {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 24px; border-radius: 12px; background: #fff;
  border: 1px solid #e2e8f0; transition: all 0.2s;
}
.ab-contact-card:hover { border-color: #93c5fd; box-shadow: 0 4px 16px rgba(0,0,0,0.04); }
.ab-contact-icon {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; background: linear-gradient(135deg, #dbeafe, #ede9fe);
}
.ab-contact-text h4 { font-size: 14px; font-weight: 700; color: #0f172a; margin-bottom: 4px; }
.ab-contact-text p { font-size: 14px; color: #475569; margin: 0; line-height: 1.55; }
.ab-contact-map {
  border-radius: 14px; overflow: hidden;
  border: 1px solid #e2e8f0; min-height: 320px;
  background: #f1f5f9; display: flex; align-items: center; justify-content: center;
}

/* ---------- CTA ---------- */
.ab-cta {
  position: relative; padding: 80px 0; text-align: center;
  background: linear-gradient(135deg, #0f2440, #1a3a5c);
  overflow: hidden;
}
.ab-cta::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 80px 80px;
}
.ab-cta .container { position: relative; z-index: 2; }
.ab-cta h2 { font-size: 32px; font-weight: 800; color: #fff; margin-bottom: 12px; }
.ab-cta p { font-size: 16px; color: rgba(255,255,255,0.65); margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto; line-height: 1.7; }
.ab-cta .ab-btn-group { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.ab-btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 34px; border-radius: 10px;
  font-size: 15px; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, #2563eb, #7c3aed);
  text-decoration: none; transition: all 0.3s;
  box-shadow: 0 6px 20px rgba(37,99,235,0.3);
}
.ab-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(37,99,235,0.4); color: #fff; text-decoration: none; }
.ab-btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 34px; border-radius: 10px;
  font-size: 15px; font-weight: 700; color: #fff;
  border: 2px solid rgba(255,255,255,0.4); background: transparent;
  text-decoration: none; transition: all 0.3s;
}
.ab-btn-outline:hover { background: rgba(255,255,255,0.08); border-color: #fff; color: #fff; text-decoration: none; }

/* ====== Responsive ====== */
@media (max-width: 992px) {
  .ab-intro-grid { grid-template-columns: 1fr; gap: 40px; }
  .ab-capabilities { grid-template-columns: repeat(2, 1fr); }
  .ab-services { grid-template-columns: repeat(2, 1fr); }
  .ab-why-grid { grid-template-columns: repeat(2, 1fr); }
  .ab-timeline::before { left: 20px; }
  .ab-timeline-item:nth-child(odd),
  .ab-timeline-item:nth-child(even) { padding: 0 0 0 50px; text-align: left; flex-direction: row; }
  .ab-timeline-item::before { left: 20px; }
  .ab-contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .ab-banner { min-height: 360px; }
  .ab-banner-text h1 { font-size: 30px; }
  .ab-banner-text p { font-size: 15px; }
  .ab-section { padding: 50px 0; }
  .ab-section-head h2 { font-size: 26px; }
  .ab-intro-stats { grid-template-columns: repeat(2, 1fr); }
  .ab-capabilities { grid-template-columns: 1fr; }
  .ab-services { grid-template-columns: 1fr; }
  .ab-why-grid { grid-template-columns: 1fr; }
}