/* ===== 全局重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: linear-gradient(145deg, #f6f9fc 0%, #e6f0f5 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
  padding: 1.5rem;
}

/* ===== 主容器 ===== */
.card {
  max-width: 1200px;
  width: 100%;
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 20px 40px rgba(0,20,30,0.15), 0 8px 16px rgba(0,0,0,0.05);
  border-radius: 48px;
  padding: 2.5rem 2.2rem;
  border: 1px solid rgba(255,255,255,0.5);
  transition: all 0.2s ease;
}

/* ===== 标题区 ===== */
.hero { text-align: center; margin-bottom: 2.8rem; }
.hero h1 {
  font-size: 2.6rem;
  font-weight: 600;
  color: #1a2e3f;
  letter-spacing: 1px;
  text-shadow: 0 2px 4px rgba(255,255,255,0.6);
  display: inline-block;
  padding: 0 1.2rem 0.6rem;
  border-bottom: 4px solid #3b8cbf;
  border-radius: 0 0 12px 12px;
  background: linear-gradient(to right, transparent, rgba(59,140,191,0.08), transparent);
}
.hero h1 small {
  font-size: 1.8rem;
  font-weight: 300;
  color: #2e5778;
  margin-left: 6px;
}

/* ===== 二维码网格 ===== */
.qr-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
  align-items: stretch;
}
.qr-item {
  flex: 1 1 0;
  min-width: 240px;
  max-width: 460px;
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-radius: 32px;
  padding: 1.8rem 1.2rem 2rem;
  box-shadow: 0 8px 20px rgba(0,20,30,0.08);
  border: 1px solid rgba(255,255,255,0.7);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.qr-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 32px rgba(26,46,63,0.12);
  background: rgba(255,255,255,0.7);
}
.qr-item .label {
  font-size: 1.5rem;
  font-weight: 500;
  color: #1e3b4f;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.3px;
}
.qr-item .label span {
  background: rgba(59,140,191,0.12);
  padding: 0.2rem 1rem;
  border-radius: 40px;
  font-size: 0.9rem;
  font-weight: 400;
  color: #1f577a;
}
.qr-item .img-wrap {
  width: 100%;
  max-width: 240px;
  aspect-ratio: 1/1;
  margin: 0.8rem auto;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 6px 16px rgba(0,0,0,0.06);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}
.qr-item .img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  border-radius: 16px;
  background: #fafafa;
  transition: transform 0.2s;
}
.qr-item .img-wrap img:hover { transform: scale(1.02); }
.qr-item .hint {
  margin-top: 0.8rem;
  font-size: 0.95rem;
  color: #305d7a;
  background: rgba(255,255,255,0.5);
  padding: 0.3rem 1.2rem;
  border-radius: 60px;
  backdrop-filter: blur(2px);
  border: 1px solid rgba(255,255,255,0.3);
  display: inline-block;
}
.qr-item .hint i { font-style: normal; display: inline-block; margin-right: 6px; }

.wechat .label { color: #1f8b4c; }
.wechat .label span { background: rgba(31,139,76,0.12); color: #0f6b37; }
.qq .label { color: #1a6bb0; }
.qq .label span { background: rgba(26,107,176,0.12); color: #0d4d85; }

/* ===== 联系方式区域 ===== */
.contact-wrap { margin-top: 2.8rem; padding: 0 0.5rem; }

.toggle-btn {
  display: block;
  margin: 0 auto 1.2rem;
  padding: 0.6rem 1.8rem;
  background: rgba(59,140,191,0.15);
  border: 2px solid rgba(59,140,191,0.3);
  border-radius: 60px;
  color: #1a4d6e;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(4px);
  font-family: inherit;
}
.toggle-btn:hover {
  background: rgba(59,140,191,0.25);
  border-color: rgba(59,140,191,0.5);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59,140,191,0.15);
}
.toggle-btn:active { transform: translateY(0); }

.contact-content {
  display: none;
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-radius: 24px;
  padding: 1.8rem 2rem;
  border: 1px solid rgba(255,255,255,0.6);
  animation: fadeIn 0.4s ease;
}
.contact-content.show { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}
.info-box { padding: 0.8rem; }
.info-box h3 {
  font-size: 0.85rem;
  color: #2e5778;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.8rem;
  border-bottom: 2px solid rgba(59,140,191,0.15);
  padding-bottom: 0.4rem;
}
.info-box p,
.info-box a {
  font-size: 0.95rem;
  color: #1a3d55;
  line-height: 1.8;
  display: block;
}
.info-box a {
  color: #1f6d9e;
  text-decoration: none;
  transition: color 0.2s;
}
.info-box a:hover { color: #0d4d85; text-decoration: underline; }
.info-box .phone {
  font-size: 1.1rem;
  font-weight: 600;
  color: #1a6bb0;
}
.info-box .phone:hover { color: #0d4d85; text-decoration: none; }
.info-box .label {
  font-size: 0.8rem;
  color: #5a7f9a;
  margin-right: 6px;
}
.info-box .sub {
  font-size: 0.85rem;
  color: #5a7f9a;
  margin-top: 0.3rem;
}

/* ===== 底部 ===== */
.footer {
  margin-top: 2rem;
  text-align: center;
  font-size: 1rem;
  color: #1a3d55;
  background: rgba(255,255,255,0.4);
  padding: 1rem 1.8rem;
  border-radius: 60px;
  backdrop-filter: blur(2px);
  border: 1px solid rgba(255,255,255,0.3);
  letter-spacing: 0.5px;
  line-height: 1.6;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.footer strong { color: #1f6d9e; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  body { padding: 1rem; }
  .card { padding: 1.8rem 1.2rem; border-radius: 32px; }
  .hero h1 { font-size: 2rem; }
  .hero h1 small { font-size: 1.4rem; display: block; margin-top: 2px; }
  .qr-grid { flex-direction: column; align-items: center; gap: 2rem; }
  .qr-item { flex: 0 0 auto; width: 100%; max-width: 400px; padding: 1.6rem 1rem; }
  .qr-item .img-wrap { max-width: 200px; }
  .qr-item .label { font-size: 1.3rem; }
  .contact-content { padding: 1.2rem 1rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 0.8rem; }
}
@media (max-width: 480px) {
  .card { padding: 1.2rem 0.8rem; border-radius: 24px; }
  .hero h1 { font-size: 1.7rem; }
  .qr-item { padding: 1.2rem 0.6rem; border-radius: 24px; }
  .qr-item .img-wrap { max-width: 160px; }
}
@media (min-width: 1200px) {
  .qr-item { max-width: 420px; }
  .card { padding: 3rem 2.8rem; }
}