:root {
  color-scheme: light;
  --ink: #0B1F2A;
  --muted: #53656E;
  --line: #BFE9F0;
  --surface: #F5FAFB;
  --mint: #4FE6C6;
  --cyan: #19C3EE;
  --error: #B42318;
  --success: #167047;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--surface); }
body { margin: 0; color: var(--ink); background: var(--surface); line-height: 1.55; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button, a, input { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible { outline: 3px solid #1485A3; outline-offset: 3px; }
[hidden] { display: none !important; }

.page-frame { position: relative; display: flex; width: min(100%, 480px); min-height: 100svh; flex-direction: column; margin: 0 auto; background: #fff; box-shadow: 0 0 36px rgba(11, 31, 42, .06); }
.brand-header { display: flex; min-height: 80px; align-items: center; gap: 12px; padding: 12px 20px; border-bottom: 1px solid #E7F2F4; background: #fff; font-size: 17px; font-weight: 750; }
.brand-header img { width: 56px; height: 56px; border-radius: 12px; object-fit: contain; }
#main-content { flex: 1; padding: 18px 20px 148px; }
.message-screen { display: flex; min-height: 55vh; flex-direction: column; align-items: stretch; justify-content: center; gap: 22px; }
.message-screen h1 { margin: 0; font-size: 22px; line-height: 1.5; text-align: center; }
.message-screen > p { color: var(--muted); text-align: center; }
.checkout-screen { width: 100%; }
.summary-card { position: sticky; z-index: 2; top: 0; display: grid; gap: 4px; margin: 0 -4px 20px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, .98); box-shadow: 0 5px 20px rgba(11, 31, 42, .07); font-size: 15px; }
.summary-card strong { font-size: 17px; line-height: 1.4; }
.summary-price { color: var(--ink); font-size: 18px; font-weight: 800; }
.step-label { margin: 0 0 10px; color: var(--muted); font-size: 14px; }
.step-panel h1 { margin: 0 0 12px; font-size: 23px; line-height: 1.4; }
.step-description { margin: 0 0 14px; color: var(--muted); font-size: 16px; }
.focus-options { display: grid; gap: 9px; }
.focus-option { display: flex; width: 100%; min-height: 52px; align-items: center; padding: 12px 14px; border: 1px solid #D4E2E6; border-radius: 12px; color: var(--ink); background: #fff; text-align: left; cursor: pointer; font-size: 16px; font-weight: 650; }
.focus-option:hover { border-color: #4EC7D4; background: #F6FCFC; }
.focus-option.is-selected { border-color: #1093A9; color: #0B1F2A; background: #DFF9F5; box-shadow: inset 0 0 0 1px #1093A9; }
.line-status { margin: 0 0 14px; padding: 13px 14px; border-radius: 12px; background: var(--surface); font-size: 16px; }
.friend-panel { margin-top: 16px; }
.friend-panel p { margin: 9px 0 0; color: var(--muted); font-size: 14px; }
.field-group { margin: 0 0 16px; }
.field-label { display: block; margin: 0 0 6px; font-size: 16px; font-weight: 700; }
.optional-label { margin-left: 5px; color: var(--muted); font-size: 14px; font-weight: 400; }
.text-field { display: block; width: 100%; min-height: 48px; padding: 10px 12px; border: 1px solid #BDCDD2; border-radius: 10px; color: var(--ink); background: #fff; font-size: 16px; }
.text-field:focus { border-color: #1485A3; outline: 3px solid rgba(20, 133, 163, .15); }
.consent-row { display: flex; align-items: flex-start; gap: 10px; margin: 18px 0 8px; font-size: 16px; line-height: 1.5; }
.consent-row input { width: 20px; height: 20px; flex: 0 0 20px; margin: 2px 0 0; accent-color: #1093A9; }
.form-error { margin: 6px 0 0; color: var(--error); font-size: 14px; font-weight: 600; }
.page-error { margin: 0 0 12px; }
.step-actions { position: fixed; z-index: 5; right: auto; bottom: 0; left: 50%; width: min(100%, 480px); padding: 12px 20px max(12px, env(safe-area-inset-bottom)); transform: translateX(-50%); border-top: 1px solid #E7F2F4; background: rgba(255, 255, 255, .98); box-shadow: 0 -7px 24px rgba(11, 31, 42, .08); }
.button { display: inline-flex; min-height: 52px; align-items: center; justify-content: center; padding: 12px 16px; border: 1px solid transparent; border-radius: 14px; cursor: pointer; font-size: 17px; font-weight: 750; line-height: 1.25; text-align: center; transition: filter .16s ease, transform .16s ease; }
.button:hover { filter: brightness(.97); }
.button:active { transform: translateY(1px); }
.button-primary { color: #0B1F2A; background: linear-gradient(90deg, #4FE6C6, #19C3EE); }
.button-secondary { border-color: #BFE9F0; color: #0B1F2A; background: #fff; }
.button-wide { width: 100%; }
.button:disabled { border-color: #DCE5EA; color: #3B4A55; background: #DCE5EA; cursor: not-allowed; opacity: 1; }
.payment-note { margin: 8px 0 0; color: var(--muted); font-size: 13px; text-align: center; }
.payment-fallback { margin: 24px 0 0; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.payment-fallback p { margin: 0 0 10px; font-size: 15px; font-weight: 700; }
.payment-fallback small { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
.debug-panel { display: grid; gap: 3px; margin-top: 28px; padding: 10px; border-radius: 8px; color: #738087; background: #F2F4F5; font-size: 12px; overflow-wrap: anywhere; }
.page-footer { margin-top: auto; padding: 15px 20px 18px; border-top: 1px solid #E7F2F4; color: var(--muted); background: #fff; font-size: 13px; line-height: 1.5; text-align: center; }

/* 內部服務管理頁共用的表單與紀錄樣式 */
.topbar { display: flex; min-height: 64px; align-items: center; justify-content: space-between; gap: 16px; padding: 10px max(20px, calc((100vw - 760px) / 2)); border-bottom: 1px solid #E7F2F4; background: #fff; }
.wordmark { color: var(--ink); font-size: 19px; font-weight: 800; letter-spacing: .06em; }
.wordmark small { margin-left: 7px; color: var(--muted); font-size: 12px; letter-spacing: 0; }
.top-cta { padding: 8px 12px; border: 1px solid var(--line); border-radius: 10px; font-size: 14px; }
.checkout-section { min-height: calc(100vh - 120px); padding: 28px 16px; background: var(--surface); }
.checkout-shell { width: min(100%, 760px); margin: 0 auto; padding: 24px; border: 1px solid #E0EAEC; border-radius: 16px; background: #fff; box-shadow: 0 10px 30px rgba(11, 31, 42, .06); }
.eyebrow { margin: 0 0 8px; color: #167D8F; font-size: 13px; font-weight: 750; }
.checkout-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.form-grid label, .admin-panel > label { display: grid; gap: 6px; font-size: 15px; font-weight: 700; }
.form-grid input, .admin-panel input, .admin-panel select, .checkout-shell select { width: 100%; min-height: 48px; padding: 9px 11px; border: 1px solid #BDCDD2; border-radius: 10px; background: #fff; font-size: 16px; }
.form-grid label > span, .admin-panel label > span { color: var(--error); }
.privacy-note { color: var(--muted); font-size: 14px; }
.form-status { min-height: 1.5em; margin: 12px 0; color: var(--muted); font-size: 15px; }
.form-status[data-state="error"], .notification-error { color: var(--error) !important; }
.form-status[data-state="success"] { color: var(--success); }
.checkout-summary { margin: 16px 0; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.notification-history { margin-top: 26px; padding-top: 18px; border-top: 1px solid #E0EAEC; }
.notification-item { display: grid; gap: 8px; margin: 10px 0; padding: 14px; border: 1px solid #DCE5EA; border-radius: 12px; background: #fff; }
.notification-item > div { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.notification-item small { color: var(--muted); font-size: 13px; }
.notification-item p { margin: 0; color: var(--muted); font-size: 14px; }
.notification-item .button { justify-self: start; min-height: 44px; font-size: 15px; }
.admin-panel { margin: 22px 0; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.admin-panel h2, .notification-history h2 { font-size: 20px; }
.admin-panel > p { color: var(--muted); font-size: 14px; }
.admin-panel > label { max-width: 420px; margin: 14px 0; }
.group-program-admin { display: grid; gap: 14px; margin-top: 18px; }
.group-program-annual, .group-quarter-item { padding: 16px; border: 1px solid #DCE5EA; border-radius: 12px; background: #fff; }
.group-quarter-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.group-program-annual h3, .group-quarter-item h3 { margin: 0 0 8px; font-size: 18px; }
.group-program-annual p, .group-quarter-item p { margin: 8px 0; color: var(--muted); font-size: 14px; }
.focus-keyword { display: inline-block; margin: 3px; padding: 3px 8px; border-radius: 999px; color: var(--ink); background: #E8F5F7; font-size: 13px; }
.footer { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 18px max(20px, calc((100vw - 760px) / 2)); border-top: 1px solid #E7F2F4; color: var(--muted); background: #fff; font-size: 13px; }
.footer p { margin: 0; }

@media (max-width: 560px) {
  .checkout-shell { padding: 18px; }
  .form-grid, .group-quarter-grid { grid-template-columns: 1fr; }
  .footer { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}