/* ==================== 06｜活動報名（不使用主視覺） ==================== */
.signup-section { background: radial-gradient(circle at 95% 15%,rgba(245,203,83,.18),transparent 19%),radial-gradient(circle at 7% 80%,rgba(231,167,160,.17),transparent 21%),#fffdf7; }
.signup-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.signup-card { padding: 30px; background: linear-gradient(135deg,#fff,#fff8e9); border: 1px solid rgba(205,150,60,.15); border-radius: 28px; box-shadow: var(--shadow-card); }
.signup-card-head { display: flex; justify-content: space-between; gap: 15px; }
.signup-index { color: var(--color-gold); font-size: 15px; font-weight: 900; }
.signup-card h3 { margin: 6px 0 0; color: var(--color-red-dark); font: 900 25px/1.45 "Noto Serif TC",serif; }
.signup-platform { height: max-content; padding: 5px 11px; color: var(--color-red); background: rgba(157,32,39,.07); border-radius: var(--radius-button); font-size: 13px; font-weight: 900; white-space: nowrap; }
.signup-copy { margin: 18px 0 22px; color: var(--color-muted); font-size: 16px; }
.signup-details { display: grid; gap: 8px; margin: 0 0 22px; padding: 15px 17px; list-style: none; background: #fff8e9; border-left: 4px solid var(--color-red); border-radius: 16px; }
.signup-card > a { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 0 22px; color: white; background: var(--color-red); border-radius: var(--radius-button); font-size: 15px; font-weight: 900; }