/* 招商样稿入口页样式 */
:root {
  --in-bg: #f4f6f9;
  --in-card: #ffffff;
  --in-primary: #1e3a8a;
  --in-text: #334155;
  --in-border: #e2e8f0;
}

body {
  background: var(--in-bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--in-text);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 40px 20px;
}

.portal-container {
  max-width: 1000px;
  width: 100%;
}

.portal-header {
  text-align: center;
  margin-bottom: 60px;
}

.portal-header h1 {
  font-size: 36px;
  color: var(--in-primary);
  margin-bottom: 16px;
  font-weight: 700;
  letter-spacing: 1px;
}

.portal-header p {
  font-size: 16px;
  color: #64748b;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

.portal-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.portal-card {
  background: var(--in-card);
  border-radius: 12px;
  padding: 40px 30px;
  text-align: center;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--in-border);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.portal-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: #cbd5e1;
  transition: 0.3s;
}

.portal-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(30, 58, 138, 0.08);
  border-color: transparent;
}

.portal-card.sh::before { background: #0F2540; } /* 上海 */
.portal-card.js::before { background: #1F6CDD; } /* 江苏 */
.portal-card.zj::before { background: #113F4D; } /* 浙江 */

.portal-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 24px;
  font-weight: bold;
}

.portal-card.sh .portal-icon { background: rgba(15, 37, 64, 0.1); color: #0F2540; }
.portal-card.js .portal-icon { background: rgba(31, 108, 221, 0.1); color: #1F6CDD; }
.portal-card.zj .portal-icon { background: rgba(17, 63, 77, 0.1); color: #113F4D; }

.portal-card h3 {
  font-size: 22px;
  margin-bottom: 12px;
  color: #0f172a;
}

.portal-card p {
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
  margin-bottom: 24px;
}

.portal-link-text {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--in-primary);
  opacity: 0.8;
  transition: 0.3s;
}

.portal-card:hover .portal-link-text {
  opacity: 1;
  transform: translateX(4px);
}

.portal-footer {
  text-align: center;
  margin-top: 80px;
  font-size: 13px;
  color: #94a3b8;
}

@media (max-width: 900px) {
  .portal-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .portal-grid { grid-template-columns: 1fr; }
  .portal-header h1 { font-size: 28px; }
  .portal-card { padding: 30px 20px; }
}