/* ===== 平台介绍页特有样式 ===== */

.platform-hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, #0b2a6e 0%, #1a5cd6 50%, #00c9a7 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.platform-hero::before {
  content: "";
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
  top: -200px;
  right: -100px;
}

.platform-hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.platform-hero-badge {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}

.platform-hero h1 {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.platform-hero p {
  font-size: 1.1rem;
  opacity: 0.9;
  line-height: 1.8;
  margin-bottom: 12px;
}

/* 功能亮点 */
.platform-features {
  padding: 80px 0;
  background: var(--bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-light);
  padding: 32px 24px;
  border-radius: var(--radius);
  border: 1px solid #e8ecf1;
  text-align: center;
  transition: all var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  border-color: var(--primary);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  background: var(--primary-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: var(--text);
}

.feature-card p {
  font-size: 0.93rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* 平台入口区 */
.platform-entry {
  padding: 80px 0;
  background: var(--bg-light);
}

.platform-entry-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.entry-qr {
  background: var(--bg);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}

.entry-qr h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  color: var(--text);
}

.entry-qr .qr-subtitle {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 24px;
}

.qr-placeholder {
  width: 200px;
  height: 200px;
  margin: 0 auto 20px;
  background: #f0f4f8;
  border: 2px dashed #c8d6e8;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: #a0b3cc;
  font-size: 0.9rem;
}

.qr-placeholder .qr-icon {
  font-size: 2.5rem;
  opacity: 0.5;
}

.entry-qr .qr-img {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  margin: 0 auto 20px;
  display: block;
}

.entry-qr .qr-tip {
  font-size: 0.82rem;
  color: var(--text-light);
  margin-top: 12px;
}

.entry-web {
  background: var(--bg);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.entry-web h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  color: var(--text);
}

.entry-web .web-subtitle {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-bottom: 24px;
  line-height: 1.7;
}

.web-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.web-feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text);
}

.web-feature-item .check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #e6faf4;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.btn-web {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
}

.btn-web:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26, 92, 214, 0.35);
}

.btn-web .arrow {
  transition: transform var(--transition);
}

.btn-web:hover .arrow {
  transform: translateX(4px);
}

/* 响应式 */
@media (max-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .platform-entry-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .platform-hero {
    padding: 110px 0 60px;
  }

  .platform-hero h1 {
    font-size: 2rem;
  }

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

  .entry-web {
    display: none;
  }

  .entry-qr {
    max-width: 360px;
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  .platform-hero h1 {
    font-size: 1.6rem;
  }

  .entry-qr,
  .entry-web {
    padding: 28px 20px;
  }
}