/* === About 页面样式 === */

/* ===== Hero 区域 ===== */
.hero {
  padding: var(--space-xl) 0 var(--space-lg);
  text-align: center;
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-logo {
  width: 96px;
  height: 96px;
  object-fit: contain;
  margin-bottom: var(--space-md);
  filter: drop-shadow(0 4px 12px rgba(93, 185, 150, 0.15));
  animation: hero-logo-float 4s ease-in-out infinite;
}

@keyframes hero-logo-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 18px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-md);
}

.hero-badge svg {
  color: var(--color-primary);
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  line-height: 1.15;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 640px;
  margin-bottom: var(--space-lg);
}

.hero-stats {
  display: flex;
  gap: var(--space-xl);
  flex-wrap: wrap;
  justify-content: center;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.hero-stat-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ===== 通用区块标题 ===== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-header h2 {
  margin-bottom: var(--space-sm);
}

/* ===== 公司简介 ===== */
.intro-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.intro-card {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
}

.intro-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-primary-dark);
  margin-bottom: var(--space-md);
}

.intro-card h3 {
  margin-bottom: var(--space-sm);
}

/* ===== 团队特点 ===== */
.feature-card {
  text-align: center;
  padding: var(--space-lg) var(--space-md);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

/* ===== 技术理念 ===== */
.tech-principles {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 760px;
  margin: 0 auto;
}

.tech-principle {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: all var(--transition-base);
}

.tech-principle:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.tech-principle-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  flex-shrink: 0;
  min-width: 48px;
}

.tech-principle-body h3 {
  margin-bottom: var(--space-xs);
}

.tech-principle-body p {
  margin-bottom: 0;
}

.tech-principle-body code {
  font-family: var(--font-mono);
  background: var(--color-bg-alt);
  color: var(--color-primary-dark);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.9em;
}

/* ===== 产品路线图（竖向时间线） ===== */
.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-md);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -40px;
  top: 4px;
}

.timeline-dot {
  display: block;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-white);
  border: 3px solid var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-bg);
  transition: all var(--transition-base);
}

.timeline-item:hover .timeline-dot {
  background: var(--color-primary);
  transform: scale(1.15);
}

.timeline-content {
  padding: var(--space-md);
}

.timeline-phase {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  background: var(--color-surface);
  padding: 2px 12px;
  border-radius: 999px;
  margin-bottom: var(--space-xs);
}

.timeline-content h3 {
  margin-bottom: var(--space-xs);
}

.timeline-content p {
  margin-bottom: 0;
}

/* ===== 扩展能力 ===== */
.capability-card {
  position: relative;
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  overflow: hidden;
}

.capability-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-primary-dark);
  margin-bottom: var(--space-md);
}

.capability-card h3 {
  margin-bottom: var(--space-xs);
}

.capability-card p {
  margin-bottom: var(--space-md);
}

.capability-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg-alt);
  padding: 3px 12px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
}

/* ===== 联系方式 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-item {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: all var(--transition-base);
}

.contact-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.contact-item-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-primary-dark);
  flex-shrink: 0;
}

.contact-item-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.contact-item-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.contact-item-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.contact-item-placeholder {
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ===== 联系表单 ===== */
.contact-form {
  padding: var(--space-lg);
}

.contact-form h3 {
  margin-bottom: var(--space-md);
}

.form-field {
  margin-bottom: var(--space-md);
}

.form-field label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(93, 185, 150, 0.15);
  background: var(--color-white);
}

.form-field input.invalid,
.form-field textarea.invalid {
  border-color: var(--color-error);
}

.contact-form-submit {
  width: 100%;
  justify-content: center;
}

.form-feedback {
  margin-top: var(--space-sm);
  font-size: 0.9rem;
  text-align: center;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

.form-feedback.success {
  color: var(--color-primary-dark);
  background: var(--color-surface);
}

.form-feedback.error {
  color: var(--color-error);
  background: rgba(212, 119, 106, 0.1);
}

/* ===== 滚动入场动画初始状态 ===== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .hero {
    padding: var(--space-lg) 0 var(--space-md);
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-stats {
    gap: var(--space-md);
  }

  .hero-stat-num {
    font-size: 1.8rem;
  }

  .intro-grid {
    grid-template-columns: 1fr;
  }

  .tech-principle {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .tech-principle-num {
    min-width: auto;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}