/* ============================================================
   aboutUs.css — 深色科技风格
   ============================================================ */

:root {
  --primary: #00d4ff;
  --primary-dark: #0099cc;
  --accent: #ff6b35;
  --bg-dark: #0a0e1a;
  --bg-card: #111827;
  --bg-card-hover: #1a2332;
  --text-primary: #ffffff;
  --text-secondary: rgba(255,255,255,0.7);
  --text-muted: rgba(255,255,255,0.4);
  --border-color: rgba(255,255,255,0.1);
}

/* ----- 通用 ----- */
.ab-section-head {
  text-align: center;
  margin-bottom: 64px;
}
.ab-section-label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.ab-section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 16px;
  line-height: 1.2;
}
.ab-section-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
}

/* ----- Hero ----- */
.ab-hero {
  position: relative;
  padding: 180px 24px 140px;
  background: var(--bg-dark);
  overflow: hidden;
}
.ab-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, rgba(0,212,255,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 80% 20%, rgba(255,107,53,0.1) 0%, transparent 50%),
    radial-gradient(ellipse 50% 40% at 20% 80%, rgba(0,212,255,0.08) 0%, transparent 50%);
}
.ab-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.ab-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  padding: 8px 20px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 100px;
  margin-bottom: 32px;
  letter-spacing: 0.5px;
}
.ab-hero-badge i {
  font-size: 14px;
}
.ab-hero-title {
  font-size: 56px;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 24px;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.ab-hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0 0 64px;
}
.ab-hero-stats {
  display: flex;
  justify-content: center;
  gap: 64px;
}
.ab-hero-stat {
  text-align: center;
}
.ab-hero-stat-num {
  display: block;
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}
.ab-hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ----- Company Intro ----- */
.ab-intro {
  padding: 120px 24px;
  background: var(--bg-dark);
}
.ab-intro-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.ab-intro-content {
  padding-right: 32px;
}
.ab-intro-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.ab-intro-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 24px;
  line-height: 1.2;
}
.ab-intro-text p {
  font-size: 16px;
  line-height: 2;
  color: var(--text-secondary);
  margin: 0 0 20px;
}
.ab-intro-text p:last-child {
  margin-bottom: 0;
}
.ab-intro-text strong {
  color: var(--text-primary);
  font-weight: 700;
}
.ab-intro-image {
  position: relative;
}
.ab-intro-img-box {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
}
.ab-intro-img-box img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  display: block;
}
.ab-intro-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.2), transparent 50%);
}
.ab-intro-img-badge {
  position: absolute;
  bottom: 20px;
  right: 20px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(0,212,255,0.2);
  border: 1px solid rgba(0,212,255,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s;
}
.ab-intro-img-badge:hover {
  background: rgba(0,212,255,0.3);
  transform: scale(1.1);
}
.ab-intro-img-badge i {
  color: var(--primary);
  font-size: 20px;
}

/* ----- Services（业务领域）----- */
.ab-services {
  padding: 120px 24px;
  background: #0d1117;
}
.ab-services-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.ab-services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.ab-svc-card {
  background: var(--bg-card);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: all 0.35s;
}
.ab-svc-card:hover {
  border-color: rgba(0,212,255,0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}
.ab-svc-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.ab-svc-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s;
}
.ab-svc-card:hover .ab-svc-image img {
  transform: scale(1.1);
}
.ab-svc-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(10,14,26,0.6), rgba(10,14,26,0.9));
}
.ab-svc-content {
  padding: 32px;
}
.ab-svc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.ab-svc-header h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}
.ab-svc-tag {
  font-size: 10px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(0,212,255,0.15);
  color: var(--primary);
  letter-spacing: 0.5px;
}
.ab-svc-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0 0 20px;
}
.ab-svc-features {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.ab-svc-features span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}
.ab-svc-features i {
  color: var(--primary);
  font-size: 10px;
}

/* ----- Advantages（核心优势）----- */
.ab-advantages {
  padding: 120px 24px;
  background: var(--bg-dark);
}
.ab-advantages-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.ab-adv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.ab-adv-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 40px;
  border: 1px solid var(--border-color);
  transition: all 0.35s;
}
.ab-adv-card:hover {
  border-color: rgba(0,212,255,0.3);
  background: var(--bg-card-hover);
}
.ab-adv-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  transition: all 0.35s;
}
.ab-adv-card:hover .ab-adv-icon {
  background: rgba(0,212,255,0.15);
  transform: scale(1.1);
}
.ab-adv-icon i {
  font-size: 28px;
  color: var(--primary);
}
.ab-adv-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 12px;
}
.ab-adv-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin: 0;
}

/* ----- Partners（合作伙伴）----- */
.ab-partners {
  padding: 120px 24px;
  background: #0d1117;
}
.ab-partners-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.ab-partners-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.ab-partner-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 32px;
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  transition: all 0.3s;
}
.ab-partner-item:hover {
  border-color: rgba(0,212,255,0.3);
  background: var(--bg-card-hover);
}
.ab-partner-item i {
  font-size: 32px;
  color: var(--text-muted);
  transition: color 0.3s;
}
.ab-partner-item:hover i {
  color: var(--primary);
}
.ab-partner-item span {
  font-size: 14px;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

/* ----- Contact（联系我们）----- */
.ab-contact {
  padding: 120px 24px;
  background: var(--bg-dark);
}
.ab-contact-inner {
  max-width: 1000px;
  margin: 0 auto;
}
.ab-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: stretch;
}

.ab-contact-info {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border-radius: 16px;
  border: 1px solid var(--border-color);
  padding: 40px;
}
.ab-contact-card {
  padding: 0;
}
.ab-contact-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 28px;
}
.ab-contact-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.ab-contact-row {
  display: flex;
  gap: 16px;
}
.ab-contact-row i {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 14px;
  margin-top: 2px;
}
.ab-contact-row > div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.ab-contact-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.ab-contact-row > div > span:last-child {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.ab-coop-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.ab-coop-tags span {
  font-size: 12px;
  padding: 8px 18px;
  border-radius: 100px;
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.15);
  color: var(--text-secondary);
  letter-spacing: 0.3px;
  transition: all 0.2s;
}
.ab-coop-tags span:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Contact Form */
.ab-contact-form {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 48px;
  border: 1px solid var(--border-color);
}
.ab-contact-form h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 32px;
}
.ab-form-group {
  margin-bottom: 24px;
}
.ab-form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.ab-contact-form input,
.ab-contact-form textarea {
  display: block;
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  font-size: 14px;
  color: var(--text-primary);
  background: rgba(255,255,255,0.03);
  transition: all 0.25s;
  box-sizing: border-box;
  font-family: inherit;
}
.ab-contact-form input:focus,
.ab-contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(255,255, 255, 0.05);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}
.ab-contact-form input::placeholder,
.ab-contact-form textarea::placeholder {
  color: var(--text-muted);
}
.ab-contact-form textarea {
  resize: vertical;
  min-height: 100px;
}
.ab-form-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #000;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all 0.3s;
}
.ab-form-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0,212,255,0.4);
}
.ab-form-btn:active {
  transform: translateY(0);
}

.ab-form-success {
  display: none;
  text-align: center;
  padding: 48px 24px;
  background: rgba(0,212,255,0.05);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 12px;
  margin-top: 16px;
}
.ab-success-icon {
  display: block;
  font-size: 48px;
  color: var(--primary);
  margin-bottom: 16px;
}
.ab-form-success p {
  font-size: 15px;
  color: var(--text-secondary);
  margin: 0;
}

/* ----- Responsive ----- */
@media (max-width: 900px) {
  .ab-hero-title { font-size: 40px; }
  .ab-section-title { font-size: 28px; }
  .ab-intro-inner { grid-template-columns: 1fr; gap: 48px; }
  .ab-services-grid { grid-template-columns: 1fr; }
  .ab-adv-grid { grid-template-columns: 1fr; }
  .ab-partners-grid { grid-template-columns: repeat(2, 1fr); }
  .ab-contact-grid { grid-template-columns: 1fr; }
  .ab-hero-stats { gap: 32px; }
  .ab-hero-stat-num { font-size: 28px; }
}

@media (max-width: 480px) {
  .ab-hero { padding: 120px 20px 80px; }
  .ab-hero-title { font-size: 32px; }
  .ab-section-title { font-size: 24px; }
  .ab-intro-img-box img { height: 300px; }
  .ab-partners-grid { grid-template-columns: 1fr; }
  .ab-contact-form { padding: 32px 24px; }
  .ab-contact-card { padding: 28px 24px; }
}