/* ========================================
   关于页面专用样式
   ======================================== */

/* ===== ABOUT HERO ===== */
.about-hero {
  padding-bottom: var(--space-3xl);
}

/* ===== MISSION SECTION ===== */
.mission-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

@media (max-width: 1024px) {
  .mission-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

.mission-content h2 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
}

.mission-content p {
  color: var(--color-gray-600);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.mission-stats {
  display: flex;
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-gray-200);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-gray-500);
  margin-top: 0.25rem;
}

.mission-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.wave-visual svg {
  width: 200px;
  height: 200px;
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* ===== PLATFORMS SECTION ===== */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 1024px) {
  .platforms-grid {
    grid-template-columns: 1fr;
  }
}

.platform-card {
  padding: var(--space-xl);
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  transition: all var(--duration-normal) var(--ease-out);
}

.platform-card:hover {
  border-color: var(--color-black);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.platform-card.featured {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.platform-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-gray-100);
  margin-bottom: var(--space-lg);
}

.platform-card.featured .platform-icon {
  background: var(--color-gray-800);
}

.platform-card h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.platform-name {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-gray-500);
  margin-bottom: var(--space-md);
}

.platform-card.featured .platform-name {
  color: var(--color-gray-400);
}

.platform-desc {
  font-size: 0.9rem;
  color: var(--color-gray-600);
  line-height: 1.6;
  margin-bottom: var(--space-lg);
}

.platform-card.featured .platform-desc {
  color: var(--color-gray-400);
}

.platform-features {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.platform-features span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.25rem 0.5rem;
  background: var(--color-gray-100);
  color: var(--color-gray-600);
}

.platform-card.featured .platform-features span {
  background: var(--color-gray-800);
  color: var(--color-gray-400);
}

/* 小程序码样式 */
.platform-qr {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-gray-200);
  text-align: center;
}

.platform-qr .qr-image {
  width: 120px;
  height: 120px;
  object-fit: contain;
  border: 1px solid var(--color-gray-200);
}

.platform-qr .qr-tip {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-gray-500);
  margin-top: var(--space-sm);
  margin-bottom: 0;
}

/* ===== CONTACT SECTION ===== */
.contact-section {
  background: var(--color-gray-100);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

@media (max-width: 1024px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

.contact-info h2 {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.contact-info > p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-xl);
}

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

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-gray-500);
  min-width: 60px;
}

.contact-item a {
  color: var(--color-black);
  text-decoration: underline;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-gray-600);
}

.form-group input,
.form-group textarea {
  font-family: inherit;
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-gray-300);
  background: var(--color-white);
  outline: none;
  transition: border-color var(--duration-fast) ease;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-black);
}

.contact-form .btn {
  align-self: flex-start;
  margin-top: var(--space-sm);
}

/* ===== MOBILE RESPONSIVE ===== */
@media (max-width: 1024px) {
  .mission-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .mission-visual {
    order: -1;
  }
  
  .wave-visual svg {
    width: 150px;
    height: 150px;
  }
  
  .platforms-grid {
    grid-template-columns: 1fr;
  }
  
  .platform-card {
    padding: var(--space-lg);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 640px) {
  .about-hero {
    padding-bottom: var(--space-xl);
  }
  
  .mission-content h2 {
    font-size: 1.35rem;
  }
  
  .mission-content p {
    font-size: 0.9rem;
  }
  
  .mission-stats {
    flex-wrap: wrap;
    gap: var(--space-lg);
    padding-top: var(--space-md);
  }
  
  .stat-num {
    font-size: 2rem;
  }
  
  /* Platform cards */
  .platform-card {
    padding: var(--space-md);
  }
  
  .platform-card h3 {
    font-size: 1.1rem;
  }
  
  .platform-desc {
    font-size: 0.85rem;
  }
  
  .platform-features {
    gap: 4px;
  }
  
  .platform-features span {
    font-size: 0.65rem;
    padding: 0.15rem 0.4rem;
  }
  
  /* QR code */
  .platform-qr {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
  }
  
  .platform-qr .qr-image {
    width: 100px;
    height: 100px;
  }
  
  .platform-qr .qr-tip {
    font-size: 0.7rem;
  }
  
  /* Contact section */
  .contact-info h2 {
    font-size: 1.35rem;
  }
  
  .contact-info > p {
    font-size: 0.9rem;
  }
  
  .contact-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }
  
  .contact-label {
    min-width: auto;
  }
  
  .form-group input,
  .form-group textarea {
    padding: 0.6rem 0.75rem;
    font-size: 0.95rem;
  }
  
  .contact-form .btn {
    width: 100%;
    text-align: center;
  }
  
  /* Page header */
  .page-title {
    font-size: clamp(1.5rem, 6vw, 2.5rem);
  }
  
  .page-desc {
    font-size: 0.95rem;
  }
}