/* ==================== 05｜系列活動卡片 ==================== */
.events-section { background: radial-gradient(circle at 12% 12%,rgba(242,167,155,.45),transparent 25%),radial-gradient(circle at 52% 0,rgba(246,205,94,.3),transparent 28%),radial-gradient(circle at 92% 72%,rgba(203,184,220,.38),transparent 27%),#fff8e9; }
.activity-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--card-gap); }
.activity-card { overflow: hidden; background: white; border: 2px solid rgba(255,255,255,.88); clip-path: polygon(18px 0,calc(100% - 18px) 0,100% 18px,100% calc(100% - 18px),calc(100% - 18px) 100%,18px 100%,0 calc(100% - 18px),0 18px); box-shadow: 0 18px 45px rgba(100,55,35,.13); transition: .2s; }
.activity-card:hover { transform: translateY(-6px); }
.activity-cover { position: relative; aspect-ratio: 2.55/1; display: flex; align-items: flex-end; overflow: hidden; padding: 20px; background: linear-gradient(135deg,#eabcb5,#f2d99b); }
.activity-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.activity-cover::after { content: ""; position: absolute; inset: 45% 0 0; background: linear-gradient(transparent,rgba(75,27,20,.34)); }
.activity-tag, .activity-number { position: relative; z-index: 1; }
.activity-tag { margin: 0; padding: 5px 12px; color: white; background: rgba(126,27,31,.9); border-radius: var(--radius-button); font-size: 13px; font-weight: 900; }
.activity-number { position: absolute; top: 14px; right: 20px; color: rgba(255,255,255,.8); font: 900 32px/1 sans-serif; text-shadow: 0 2px 9px rgba(75,20,18,.45); }
.activity-body { min-height: 270px; position: relative; padding: 23px 23px 78px; }
.activity-date { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 14px; padding: 7px 14px; color: white; background: linear-gradient(135deg,var(--color-red),#b93c3d); border-radius: var(--radius-button); font-size: 16px; font-weight: 900; }
.activity-date small { padding-right: 9px; border-right: 1px solid rgba(255,255,255,.4); font-size: 11px; letter-spacing: .1em; }
.activity-body h3 { margin: 0 0 8px; color: var(--color-red-dark); font: 900 var(--font-card-title)/1.5 "Noto Serif TC",serif; }
.activity-summary { margin: 0; color: var(--color-muted); font-size: 16px; line-height: 1.8; display: -webkit-box; overflow: hidden; -webkit-box-orient: vertical; -webkit-line-clamp: 3; }
.details-button { position: absolute; bottom: 20px; left: 23px; padding: 0; color: var(--color-red); background: transparent; border: 0; font-size: 14px; font-weight: 900; cursor: pointer; }

/* 系列活動完整內容視窗：報名按鈕只在此處顯示 */
.modal { position: fixed; z-index: 2000; inset: 0; display: grid; place-items: center; padding: 32px; background: rgba(55,23,20,.72); backdrop-filter: blur(9px); }
.modal-panel { width: min(920px,100%); max-height: min(88svh,900px); overflow-y: auto; position: relative; border-radius: 32px; background: radial-gradient(circle at 0 0,rgba(236,180,171,.36),transparent 32%),radial-gradient(circle at 100% 30%,rgba(241,213,137,.32),transparent 34%),#fffaf0; box-shadow: 0 30px 100px rgba(46,16,13,.38); }
.modal-close { position: sticky; z-index: 2; float: right; top: 18px; width: 42px; height: 42px; margin: 18px 18px -58px 0; color: var(--color-red-dark); background: rgba(255,250,240,.94); border: 1px solid var(--color-line); border-radius: 50%; font-size: 28px; cursor: pointer; }
.modal-head { padding: 46px 70px 34px; border-bottom: 1px solid var(--color-line); }
.modal-head .activity-tag { display: inline-block; }
.modal-head h2 { margin: 15px 0 0; padding-right: 45px; color: var(--color-red-dark); font: 900 clamp(30px,5vw,48px)/1.3 "Noto Serif TC",serif; }
.modal-content { padding: 38px 70px 60px; color: #604a43; font-size: 17px; line-height: 1.95; }
.modal-intro { margin: 0 0 26px; font-size: 19px; }
.modal-facts { display: grid; gap: 8px; padding: 22px 24px; background: rgba(255,255,255,.68); border-left: 4px solid var(--color-red); border-radius: 18px; }
.modal-facts p { margin: 0; color: #71382f; font-weight: 800; }
.modal-section { margin-top: 34px; padding-top: 28px; border-top: 1px solid var(--color-line); }
.modal-section h3 { margin: 0 0 14px; color: var(--color-red); font: 900 24px/1.4 "Noto Serif TC",serif; }
.modal-section p { margin: 0; white-space: pre-line; }
.modal-section li { margin: 7px 0; }
.modal-register { margin-top: 40px; padding-top: 30px; text-align: center; border-top: 1px solid var(--color-line); }
.modal-register a { display: inline-flex; min-height: 52px; align-items: center; justify-content: center; padding: 0 28px; color: white; background: linear-gradient(135deg,#8f1f27,#b43a3c); border-radius: var(--radius-button); font-weight: 900; }
.modal-register a.download { color: var(--color-red); background: #fffaf0; border: 2px solid rgba(143,31,39,.55); }
.modal-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; }