/* site-kit 共用樣式 v1｜設計系統見 projects/site-kit/DESIGN.md */
:root {
  --paper: #f5f1e8; --card: #fffdf9; --line: #e2d9c8; --line-strong: #cfc3ad;
  --ink: #1f2a37; --ink-soft: #4e5a67;
  --accent: #b3402a; --accent-ink: #ffffff; --accent-soft: #f6e1d9;
  --ok: #2e6a4e; --ok-bg: #e4efe7; --warn: #9a3b1c; --warn-bg: #f8e4da;
  --radius: 14px; --radius-sm: 10px;
  --font-body: "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", "Heiti TC", sans-serif;
  --font-head: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --shadow: 0 1px 0 rgba(31, 42, 55, .04), 0 8px 24px -12px rgba(31, 42, 55, .18);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 72px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.7 var(--font-body); }
a { color: var(--ink); text-underline-offset: 3px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
[hidden] { display: none !important; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; z-index: 99; background: var(--card); padding: 8px 12px; }

/* 頁首 */
.kit-head { position: sticky; top: 0; z-index: 30; background: rgba(245, 241, 232, .94); backdrop-filter: saturate(1.2) blur(6px); border-bottom: 1px solid var(--line); }
.kit-head-in { max-width: 1080px; margin: 0 auto; padding: 10px 16px; display: flex; align-items: center; gap: 12px; }
.kit-brand { font: 800 1.08rem/1.2 var(--font-head); text-decoration: none; letter-spacing: .02em; }
.kit-brand::before { content: ""; display: inline-block; width: 10px; height: 10px; margin-right: 8px; border-radius: 2px; background: var(--accent); transform: rotate(45deg) translateY(-2px); }
.kit-nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.kit-nav a { padding: 10px 12px; border-radius: var(--radius-sm); text-decoration: none; font-weight: 600; font-size: .95rem; }
.kit-nav a:hover { background: var(--accent-soft); color: var(--ink); }
.kit-user { font-size: .88rem; color: var(--ink-soft); }
.kit-user button { font: inherit; background: none; border: 0; color: var(--ink-soft); text-decoration: underline; cursor: pointer; padding: 10px 6px; }

main { display: block; }
.kit-wrap { max-width: 680px; margin: 0 auto; padding: 24px 16px; }
.kit-h1 { font: 800 clamp(1.7rem, 5.2vw, 2.4rem)/1.25 var(--font-head); margin: 0 0 8px; letter-spacing: .01em; }
.kit-lede { color: var(--ink-soft); margin: 0 0 18px; font-size: 1.05rem; }
.kit-crumb { font-size: .88rem; color: var(--ink-soft); margin: 0 0 6px; }
.kit-meta { font-size: .88rem; color: var(--ink-soft); margin: 0 0 20px; }
h2 { font: 800 1.35rem/1.35 var(--font-head); margin: 0 0 10px; }

/* 按鈕 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 20px; border-radius: 12px; border: 1.5px solid var(--accent); background: var(--accent); color: var(--accent-ink); font: 700 1rem/1 var(--font-body); text-decoration: none; cursor: pointer; transition: transform .12s, box-shadow .12s; }
.btn:hover { color: var(--accent-ink); box-shadow: 0 6px 16px -8px var(--accent); transform: translateY(-1px); }
.btn:disabled { opacity: .55; cursor: progress; transform: none; box-shadow: none; }
.btn.alt { background: var(--ink); border-color: var(--ink); }
.btn.alt:hover { box-shadow: 0 6px 16px -8px var(--ink); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn small { font-weight: 600; font-size: .78rem; opacity: .85; padding: 2px 6px; border-radius: 6px; background: rgba(255, 255, 255, .16); }
.btn.line { background: #06c755; border-color: #06c755; color: #fff; }

/* 表單 */
.field { margin: 0 0 16px; }
.field > label, .field > .lab { display: block; font-weight: 700; margin: 0 0 6px; }
.field .hint { display: block; font-size: .86rem; color: var(--ink-soft); margin-top: 4px; }
.field .err { display: block; font-size: .9rem; color: var(--warn); margin-top: 6px; font-weight: 600; }
input[type=date], input[type=number], input[type=text], input[type=url], input[type=tel], input[type=email], input:not([type]), textarea, select {
  width: 100%; min-height: 50px; padding: 10px 14px; font: 16px var(--font-body); color: var(--ink);
  background: var(--card); border: 1.5px solid var(--line-strong); border-radius: var(--radius-sm); appearance: none; -webkit-appearance: none;
}
select { background-image: linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%), linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 14px) 50%; background-size: 6px 6px; background-repeat: no-repeat; padding-right: 40px; }
input:focus, textarea:focus, select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
input[aria-invalid=true] { border-color: var(--warn); }
input[type=number]::-webkit-inner-spin-button, input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
input[type=number] { -moz-appearance: textfield; }
.money { position: relative; }
.money input { padding-left: 46px; font-variant-numeric: tabular-nums; }
.money::before { content: "NT$"; position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--ink-soft); font-size: .9rem; }
.seg { display: grid; grid-template-columns: repeat(auto-fit, minmax(0, 1fr)); gap: 6px; padding: 4px; background: var(--card); border: 1.5px solid var(--line-strong); border-radius: 12px; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg label { display: flex; align-items: center; justify-content: center; text-align: center; min-height: 48px; padding: 6px 8px; border-radius: 9px; font-weight: 700; font-size: .95rem; cursor: pointer; line-height: 1.3; }
.seg input:checked + label { background: var(--ink); color: var(--paper); }
.seg input:focus-visible + label { outline: 3px solid var(--accent); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
details.more { margin: 4px 0 16px; border: 1px dashed var(--line-strong); border-radius: var(--radius-sm); padding: 0 14px; background: rgba(255, 253, 249, .6); }
details.more > summary { cursor: pointer; min-height: 48px; display: flex; align-items: center; font-weight: 700; color: var(--ink-soft); list-style: none; }
details.more > summary::before { content: "＋"; margin-right: 8px; color: var(--accent); }
details.more[open] > summary::before { content: "－"; }
details.more[open] { padding-bottom: 6px; }

/* 結果收據 */
.receipt { position: relative; background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px 18px 18px; }
.receipt::before { content: ""; position: absolute; left: 14px; right: 14px; top: 0; height: 6px; background: radial-gradient(circle at 5px -1px, var(--paper) 5px, transparent 5.5px) 0 0/14px 6px repeat-x; }
.receipt .r-title { font: 800 1rem/1.4 var(--font-head); letter-spacing: .12em; color: var(--ink-soft); margin: 0 0 12px; }
.receipt .r-total { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; border-top: 2px solid var(--ink); padding-top: 12px; margin-top: 8px; }
.receipt .r-total b { font: 800 clamp(1.9rem, 8vw, 2.6rem)/1 var(--font-head); color: var(--accent); font-variant-numeric: tabular-nums; }
.receipt .r-line { display: grid; grid-template-columns: 1fr auto; gap: 4px 12px; padding: 12px 0; border-bottom: 1px dashed var(--line-strong); }
.receipt .r-line:last-of-type { border-bottom: 0; }
.receipt .r-line .k { font-weight: 700; }
.receipt .r-line .v { font: 800 1.2rem/1.3 var(--font-head); font-variant-numeric: tabular-nums; text-align: right; }
.receipt .r-line .why { grid-column: 1 / -1; font-size: .88rem; color: var(--ink-soft); }
.receipt .r-line .why a { color: var(--ink-soft); }
.receipt .r-line.zero .v { color: var(--ink-soft); }
.receipt .r-empty { color: var(--ink-soft); text-align: center; padding: 28px 8px; }
.receipt .r-empty b { display: block; font: 800 1.15rem var(--font-head); color: var(--ink); margin-bottom: 4px; }
.note { font-size: .88rem; color: var(--ink-soft); background: var(--accent-soft); border-radius: var(--radius-sm); padding: 10px 12px; margin: 14px 0 0; }
.note.ok { background: var(--ok-bg); }

/* 文章 */
.kit-alist { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.kit-alist a { display: block; padding: 14px 16px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm); text-decoration: none; }
.kit-alist a:hover { border-color: var(--accent); color: var(--ink); }
.kit-alist b { display: block; font: 700 1.05rem/1.45 var(--font-body); }
.kit-alist span { display: block; font-size: .9rem; color: var(--ink-soft); margin-top: 2px; }
.kit-prose { max-width: 68ch; }
.kit-prose h2 { margin-top: 28px; }
.kit-prose h3 { font-size: 1.08rem; margin: 22px 0 6px; }
.kit-prose table { border-collapse: collapse; width: 100%; font-size: .95rem; margin: 12px 0; display: block; overflow-x: auto; }
.kit-prose th, .kit-prose td { border: 1px solid var(--line-strong); padding: 8px 10px; text-align: left; white-space: nowrap; }
.kit-prose th { background: var(--accent-soft); }
.kit-prose blockquote { margin: 12px 0; padding: 8px 14px; border-left: 4px solid var(--accent); background: var(--card); }
.kit-sources { margin-top: 28px; padding-top: 12px; border-top: 1px solid var(--line); font-size: .9rem; }
.kit-sources h2 { font-size: 1rem; }
.kit-cta { margin-top: 28px; }
.kit-empty { color: var(--ink-soft); }

/* 方案 */
.kit-plans { border-top: 1px solid var(--line); }
.kit-plans-lede { color: var(--ink-soft); margin: 0 0 8px; }
.kit-perks { margin: 0 0 16px; padding-left: 1.2em; }
.kit-perks li { margin: 4px 0; }
.kit-plan-btns { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.kit-fine { font-size: .85rem; color: var(--ink-soft); margin: 12px 0 0; }
.kit-soon { margin: 0 0 12px; padding: 10px 12px; border-radius: 8px; background: var(--accent-soft); font-weight: 700; }
.kit-plans .btn:disabled { cursor: not-allowed; }
.kit-id-bar { margin: 0; padding: 6px 16px; background: var(--card); border-bottom: 1px solid var(--line); color: var(--ink-soft); font-size: .82rem; text-align: center; }
.kit-id-bar button { border: 0; background: none; padding: 4px 2px; font: inherit; color: var(--ink); text-decoration: underline; cursor: pointer; min-height: 32px; }
.kit-inapp-bar { margin: 0; padding: 6px 16px; background: var(--accent-soft); color: var(--ink); font-size: .82rem; text-align: center; }
.kit-inapp { display: block; color: var(--ink-soft); margin-top: 4px; }
.kit-plans .kit-inapp { font-size: .85rem; }
.kit-err-btns { display: flex; flex-wrap: wrap; gap: 10px; }
.kit-msg { font-weight: 700; color: var(--warn); min-height: 1.2em; margin: 10px 0 0; }

/* FAQ */
.kit-faq { max-width: 680px; margin: 0 auto; padding: 8px 16px 24px; }
.kit-faq details { border-bottom: 1px solid var(--line); }
.kit-faq summary { cursor: pointer; min-height: 52px; display: flex; align-items: center; font-weight: 700; padding: 10px 28px 10px 0; position: relative; list-style: none; }
.kit-faq summary::after { content: "＋"; position: absolute; right: 2px; color: var(--accent); }
.kit-faq details[open] summary::after { content: "－"; }
.kit-faq details > div { padding: 0 0 14px; color: var(--ink-soft); }

.kit-err { text-align: center; padding-top: 64px; }

/* 頁尾（照 catpain.app） */
.kit-foot { max-width: 680px; margin: 0 auto; padding: 24px 16px 40px; text-align: center; font-size: .88rem; color: var(--ink-soft); border-top: 1px solid var(--line); }
.kit-foot a { color: var(--ink-soft); }
.kit-help { margin: 0 0 16px; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.kit-foot .kit-help-btn { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border-radius: 999px; background: #06c755; color: #fff; font-weight: 700; text-decoration: none; }
.kit-help span { font-size: .8rem; }
.powered { display: flex; align-items: center; justify-content: center; gap: 10px; margin: 18px auto 0; padding: 12px; width: fit-content; color: var(--ink-soft); font-size: .85rem; text-decoration: none; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
.powered img { height: 32px; width: auto; display: block; }

@media (max-width: 420px) { .row2 { grid-template-columns: 1fr; } .kit-plan-btns { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
@media print {
  body { background: #fff; }
  .kit-head, .kit-foot, .kit-faq, .kit-plans, .kit-related, .no-print, .skip { display: none !important; }
  .receipt { box-shadow: none; border: 1px solid #999; }
  .receipt::before { display: none; }
  .print-only { display: block !important; }
}
.print-only { display: none; }
.kit-plan { padding: 14px 0; border-top: 1px dashed var(--line-strong); }
.kit-plan:first-of-type { border-top: 0; }
.kit-plan-h { font-weight: 800; margin: 0 0 8px; }
.kit-plan > .btn { width: 100%; }