:root { --bg: #fff; --text: #0f0f0f; --muted: #6b7280; --line: #e5e7eb; --focus: #0ea5e9; --shadow: 0 10px 30px rgba(0,0,0,.08); }
* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: "Exo 2", Arial, "Noto Sans TC", 微軟正黑體, sans-serif; line-height: 1.6; }

.hero { position: relative; overflow: clip; }
.hero-img { width: 100%; /*移除最大高度限制 height: clamp(240px, 36vw, 420px);*/ object-fit: cover; filter: contrast(1.02) saturate(1.02); transform: scale(1.02); }
.hero-overlay { position: absolute; inset: 0; display: grid; align-content: end; padding: min(6vw, 48px); background: linear-gradient(to top, rgba(0,0,0,.45), transparent 55%); }
.hero-title { margin: 0; color: #fff; font-size: clamp(28px, 4vw, 48px); letter-spacing: .02em; }
.hero-subtitle { margin: 6px 0 0; color: rgba(255,255,255,.9); font-weight: 400; }

.container { max-width: 1040px; margin: 0 auto; padding: 32px 20px 64px; }
.section-title { font-size: 20px; margin: 0 0 8px; }
.lede { color: var(--muted); margin: 0 0 24px; font-size: 1.0em;}

.donation-card { background: #fff; font-size:1.0em; border: 1px solid var(--line); border-radius: 14px; padding: clamp(16px, 3vw, 28px); box-shadow: var(--shadow); }

.field-group { border: none; padding: 0; margin: 20px 0; }
.group-title { font-weight: 600; margin-bottom: 10px; }

.amount-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px; }
.chip { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--line); border-radius: 999px; padding: 10px 14px; cursor: pointer; user-select: none; transition: transform .12s ease, border-color .12s ease, background .12s ease; }
.chip input { appearance: none; width: 0; height: 0; position: absolute; }
.chip:hover { background: #f97316; color: #fff; transform: none; }
.chip:has(input:checked) { background: #f97316; color: #fff; border-color: #f97316; }

.inline { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; align-items: end; margin-top: 10px; }
.label { display: block; font-size: 1.0em; color: #111827; margin: 0 0 6px; }
.input, .textarea { width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; font: inherit; transition: border-color .12s ease, box-shadow .12s ease, background .12s; background: #fff; }
.input:focus, .textarea:focus { outline: none; border-color: var(--focus); box-shadow: 0 0 0 3px color-mix(in oklab, var(--focus) 20%, transparent); }
.hint { color: var(--muted); font-size: 13px; margin: 8px 0 0; }

.radio-list { display: flex; flex-wrap: wrap; gap: 14px; }
.radio { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; }
.radio input { width: 16px; height: 16px; }

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.payment-panel { padding: 12px; border: 1px dashed var(--line); border-radius: 10px; margin-top: 12px; }

.actions { display: flex; align-items: center; gap: 14px; margin-top: 18px; }
.btn-primary { background: #f97316; color: #fff; border: none; border-radius: 999px; padding: 12px 18px; }
.btn-primary:hover { filter: brightness(1.05); transform: none; }
.btn-primary:active { transform: translateY(0); }
.btn-ghost { background: #fff; color: #0f172a; border: 1px solid var(--line); border-radius: 10px; padding: 10px 16px; cursor: pointer; }
.secure-note { color: var(--muted); font-size: 12px; }

.errors { color: #b91c1c; margin-top: 8px; min-height: 1em; }

.modal { position: fixed; inset: 0; display: grid; place-items: center; background: rgba(0,0,0,.4); padding: 20px; }
.modal[hidden] { display: none; }
.modal-card { width: min(560px, 92vw); background: #fff; border-radius: 14px; border: 1px solid var(--line); box-shadow: var(--shadow); padding: 18px; animation: pop .18s ease; }
.modal-title { margin: 0 0 8px; font-size: 18px; }
.modal-body { color: #374151; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; }
@keyframes pop { from { transform: translateY(6px); opacity: .0; } to { transform: translateY(0); opacity: 1; } }

.footer { max-width: 1040px; margin: 24px auto 48px; padding: 0 20px; color: var(--muted); font-size: 13px; }

.banner-note { max-width: 1040px; margin: 12px auto 0; padding: 0 20px 24px; color: #555555; text-align: center; font-weight: 500; }
.emphasis { color: #c7943d; font-size: 125%; font-weight: 700; }
.banner-note p { margin: 0; line-height: 1.7; font-size:1.09em;}
.banner-note .signature { margin-top: 14px; color: var(--muted); font-style: italic; }

.visually-hidden { position: absolute !important; clip: rect(1px,1px,1px,1px); clip-path: inset(50%); height: 1px; width: 1px; overflow: hidden; white-space: nowrap; }

@media (max-width: 760px) {
  .hero-img { height: auto; object-fit: contain; }
  .amount-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .grid-2, .inline { grid-template-columns: 1fr; }
  .input, .textarea { padding: 14px 16px; font-size: 16px; }
  .chip { padding: 12px 16px; }
  .label { font-size: 15px; }
}