.activity-page { background: #f4f7f5; }
.activity-header { position: relative; background: #10201c; }
.activity-header nav a.active { color: var(--gold); }
.activity-hero { background: var(--green-dark); color: white; padding: 144px 24px 72px; }
.activity-hero-inner { width: min(1160px, 100%); margin: 0 auto; }
.activity-hero h1 { margin: 0; font-family: "Noto Serif SC", "Songti SC", Georgia, serif; font-size: clamp(42px, 6vw, 72px); }
.activity-hero p:not(.eyebrow) { max-width: 680px; margin: 18px 0 0; color: rgba(255,255,255,.76); font-size: 18px; line-height: 1.8; }
.activity-layout { width: min(1160px, calc(100% - 48px)); display: grid; grid-template-columns: .85fr 1.15fr; gap: 28px; margin: 0 auto; padding: 72px 0 100px; align-items: start; }
.activity-content, .activity-form { background: white; border: 1px solid #dce5e1; border-radius: 6px; padding: 30px; }
.activity-content h2, .activity-form h2 { margin: 0; font-family: "Noto Serif SC", "Songti SC", Georgia, serif; font-size: 32px; }
.activity-copy { margin-top: 22px; white-space: pre-wrap; color: #52625d; line-height: 2; }
.activity-back { display: inline-block; margin-top: 36px; color: var(--green); font-size: 14px; }
.form-heading { display: flex; align-items: end; justify-content: space-between; gap: 14px; margin-bottom: 24px; }
.form-heading p:last-child { margin: 0 0 4px; color: #879590; font-size: 12px; }
.activity-form { display: grid; gap: 17px; }
.activity-form label, .activity-form legend { color: #52625d; font-size: 13px; }
.activity-form input:not([type="checkbox"]), .activity-form textarea { width: 100%; border: 1px solid #d5e1dc; border-radius: 6px; background: #fbfdfc; padding: 13px 14px; color: #263b34; outline: none; transition: border-color .2s ease, box-shadow .2s ease, background .2s ease; }
.activity-form input:not([type="checkbox"]):focus, .activity-form textarea:focus { border-color: var(--green); background: #fff; box-shadow: 0 0 0 4px rgba(13,118,85,.1); }
.activity-form input::placeholder, .activity-form textarea::placeholder { color: #a2afaa; }
.platform-field { gap: 8px !important; }
.field-hint { margin-left: 8px; color: #96a49e; font-size: 12px; font-weight: 400; }
.platform-input-wrap { position: relative; display: block; }
.platform-input-wrap input { padding-left: 42px !important; }
.platform-input-icon { position: absolute; z-index: 1; top: 50%; left: 14px; color: var(--green); font-size: 20px; line-height: 1; transform: translateY(-52%); pointer-events: none; }
.platform-hint { display: block; margin-top: -2px; color: #96a49e; font-size: 12px; }
.checkbox-label input { width: 17px; height: 17px; accent-color: var(--green); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.checkbox-label { display: flex !important; align-items: center; grid-template-columns: none !important; gap: 9px !important; cursor: pointer; }
.checkbox-label span { color: #263b34; }
.submit-button { width: 100%; border: 0; }
.form-message { min-height: 20px; margin: 0; font-size: 13px; }
.form-message.error { color: #b74b3d; }
.form-message.success { color: var(--green); }
.form-muted, .activity-closed { color: #879590; font-size: 13px; }
.activity-closed { margin: 0; padding: 30px 0; text-align: center; }
@media (max-width: 900px) { .activity-header nav { display: flex; } .activity-layout { grid-template-columns: 1fr; } }
@media (max-width: 620px) { .activity-hero { padding: 112px 16px 52px; } .activity-layout { width: calc(100% - 28px); padding: 44px 0 70px; } .activity-content, .activity-form { padding: 22px 18px; } .contact-grid { grid-template-columns: 1fr; } .form-heading { align-items: start; flex-direction: column; } .field-hint { display: block; margin: 4px 0 0; } }