.sponsor-section { padding: 10px 0 75px; background: linear-gradient(150deg, #fbf9ff, #fff4f2); }
.sponsor-tier { --tier-color: #77528f; --tier-background: #f1e8f8; margin-top: 35px; }
.tier-diamond { --tier-color: #5541a4; --tier-background: linear-gradient(110deg, #e5e4ff, #f6e4ff); }
.tier-platinum { --tier-color: #665076; --tier-background: linear-gradient(110deg, #eae4f0, #f6f1fc); }
.tier-gold { --tier-color: #866121; --tier-background: linear-gradient(110deg, #ffe8b3, #fff5de); }
.tier-silver { --tier-color: #566375; --tier-background: linear-gradient(110deg, #e2e8f0, #f2f5f8); }
.sponsor-tier-heading { display: flex; align-items: center; gap: 11px; margin-bottom: 18px; padding: 13px 18px; background: var(--tier-background); border-left: 3px solid var(--tier-color); border-radius: 5px; color: var(--tier-color); }
.sponsor-tier-heading h3 { font-size: 20px; font-weight: 650; letter-spacing: -.3px; }
.sponsor-tier-mark { font-size: 25px; line-height: 1; }
.sponsor-logo-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 18px; }
.sponsor-logo-card { background: #fff; border: 1px solid #e5d7ed; border-radius: 8px; padding: 22px; display: flex; flex-direction: column; align-items: center; justify-content: center; min-width: 0; box-shadow: 0 5px 18px #60267705; }
.sponsor-logo-card a { display: block; width: 100%; }
.sponsor-logo-card img { display: block; width: 100%; height: 80px; object-fit: contain; }
.tier-diamond .sponsor-logo-card img { height: 115px; }
.tier-platinum .sponsor-logo-card img { height: 100px; }
.sponsor-note { display: block; color: #796487; font-size: 14px; line-height: 1.6; margin-top: 12px; text-align: center; }
.sponsor-preview-note { font-size: 14px; line-height: 1.6; color: #796487; margin-top: -12px; }
.sponsor-invitation { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; padding-top: 25px; margin-top: 34px; border-top: 1px solid #e3d5ed; }
.sponsor-invitation p { font-size: 18px; color: #674b78; }
@media (max-width: 960px) {
  .sponsor-logo-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .sponsor-logo-card { padding: 18px; }
}
@media (max-width: 640px) {
  .sponsor-section { padding-bottom: 48px; }
  .sponsor-logo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .sponsor-logo-card { padding: 16px; }
  .sponsor-logo-card img { height: 65px; }
  .sponsor-tier-heading { padding: 12px 14px; }
}