/* ═══════════════════════════════════════════════════════════════════════
   拍簿 Pibook — 官網樣式
   調色與字體沿用 App 的設計系統（紙與墨）：內容是紙、操控是玻璃。
   ═══════════════════════════════════════════════════════════════════════ */

:root {
  --ground: #FBF7F0;
  --surface: #FFFFFF;
  --sunken: #F4EFE6;
  --line: #E6DED1;
  --line-soft: #F0E9DE;

  --ink: #2A3744;
  --ink-soft: #5C6A78;
  --ink-fade: #93A0AC;

  --blue: #5B7A92;
  --blue-deep: #3F5A72;
  --blue-wash: #EDF1F5;

  --coral: #C75F4E;
  --coral-mark: #E8806E;
  --coral-wash: #FCEDE8;

  --green: #3F7A63;
  --green-mark: #6DA890;
  --green-wash: #EAF3EF;

  --shadow-sm: 0 1px 2px rgba(42, 55, 68, .05);
  --shadow: 0 1px 2px rgba(42, 55, 68, .05), 0 10px 30px -16px rgba(42, 55, 68, .22);

  --serif: "Noto Serif TC", "Songti TC", "Source Han Serif TC", Georgia, serif;
  --sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, -apple-system, sans-serif;

  --measure: 68ch;
  --radius: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground: #171E25;
    --surface: #212B34;
    --sunken: #1B242C;
    --line: #33404C;
    --line-soft: #2A353F;

    --ink: #E9E3D8;
    --ink-soft: #AAB6C1;
    --ink-fade: #76838F;

    --blue: #92B0C6;
    --blue-deep: #B4CBDC;
    --blue-wash: #23303B;

    --coral: #F09A88;
    --coral-mark: #E8806E;
    --coral-wash: #332624;

    --green: #86C3A8;
    --green-mark: #6DA890;
    --green-wash: #1E2E29;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 30px -16px rgba(0, 0, 0, .7);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 88px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ── 語言切換 ──────────────────────────────────────────────────────── */

body[data-lang="zh"] .en { display: none; }
body[data-lang="en"] .zh { display: none; }

/* ── 頁首 ─────────────────────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.site-header .inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  text-decoration: none;
  color: var(--ink);
}

.brand .mark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: .02em;
}

.brand .latin {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--ink-fade);
  text-transform: uppercase;
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface);
}

.lang-toggle button {
  appearance: none;
  border: 0;
  background: transparent;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .04em;
  padding: 5px 14px;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background .15s ease, color .15s ease;
}

.lang-toggle button[aria-pressed="true"] {
  background: var(--blue);
  color: #fff;
}

.lang-toggle button:focus-visible {
  outline: 2px solid var(--coral-mark);
  outline-offset: -2px;
}

/* ── 版面容器 ─────────────────────────────────────────────────────── */

.wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.doc {
  max-width: 780px;
  margin: 0 auto;
  padding: 56px 24px 96px;
}

/* ── 首頁英雄區 ───────────────────────────────────────────────────── */

.hero {
  padding: 96px 0 72px;
  display: flex;
  flex-direction: column;
  gap: 26px;
  align-items: flex-start;
}

.hero .kicker {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--ink-fade);
  font-weight: 500;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(34px, 6.2vw, 56px);
  line-height: 1.24;
  font-weight: 700;
  margin: 0;
  letter-spacing: .01em;
  text-wrap: balance;
  max-width: 16ch;
}

.hero p.lede {
  font-size: clamp(17px, 2.2vw, 19px);
  color: var(--ink-soft);
  margin: 0;
  max-width: 46ch;
  line-height: 1.85;
}

.badge-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 20px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 14.5px;
  font-weight: 500;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}

.store-badge .soon {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--coral);
  background: var(--coral-wash);
  padding: 2px 8px;
  border-radius: 999px;
}

/* ── 價值三欄 ─────────────────────────────────────────────────────── */

.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  padding: 8px 0 88px;
}

.pillar {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 26px 28px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.pillar h3 {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 700;
  margin: 0;
  line-height: 1.5;
}

.pillar p { margin: 0; color: var(--ink-soft); font-size: 15px; line-height: 1.75; }

.pillar .rule {
  width: 26px;
  height: 2px;
  border-radius: 2px;
  background: var(--coral-mark);
  margin-bottom: 4px;
}

/* ── 承諾區塊 ─────────────────────────────────────────────────────── */

.promise {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 64px 0;
  margin-bottom: 88px;
}

.promise blockquote {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(20px, 3vw, 27px);
  line-height: 1.7;
  max-width: 24ch;
  text-wrap: balance;
}

.promise p {
  margin: 20px 0 0;
  color: var(--ink-soft);
  max-width: 52ch;
}

/* ── 文件頁 ───────────────────────────────────────────────────────── */

.doc-head { display: flex; flex-direction: column; gap: 12px; margin-bottom: 40px; }

.doc-head h1 {
  font-family: var(--serif);
  font-size: clamp(28px, 5vw, 38px);
  line-height: 1.3;
  font-weight: 700;
  margin: 0;
  text-wrap: balance;
}

.doc-meta {
  font-size: 13.5px;
  color: var(--ink-fade);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-variant-numeric: tabular-nums;
}

.summary {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--green-mark);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 22px 26px;
  margin-bottom: 40px;
  box-shadow: var(--shadow-sm);
}

.summary h2 {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--green);
  font-weight: 500;
  margin: 0 0 10px;
  border: 0;
  padding: 0;
}

.summary ul { margin: 0; padding-left: 20px; color: var(--ink-soft); }
.summary li { margin-bottom: 6px; }
.summary li:last-child { margin-bottom: 0; }
.summary li::marker { color: var(--green-mark); }
.summary strong { color: var(--ink); font-weight: 500; }

.toc {
  background: var(--sunken);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 22px 26px;
  margin-bottom: 48px;
}

.toc h2 {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--ink-fade);
  font-weight: 500;
  margin: 0 0 12px;
  border: 0;
  padding: 0;
}

.toc ol {
  margin: 0;
  padding-left: 22px;
  columns: 2;
  column-gap: 32px;
  font-size: 14.5px;
}

.toc li { margin-bottom: 5px; break-inside: avoid; }
.toc li::marker { color: var(--ink-fade); font-variant-numeric: tabular-nums; }
.toc a { color: var(--ink-soft); text-decoration: none; }
.toc a:hover { color: var(--coral); text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 620px) { .toc ol { columns: 1; } }

.doc section { margin-bottom: 44px; scroll-margin-top: 88px; }

.doc h2 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  line-height: 1.45;
  display: flex;
  gap: 12px;
  align-items: baseline;
}

.doc h2 .num {
  font-size: 14px;
  color: var(--ink-fade);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  flex: 0 0 auto;
}

.doc h3 {
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 700;
  margin: 26px 0 8px;
  line-height: 1.6;
}

.doc p { margin: 0 0 14px; max-width: var(--measure); }
.doc p:last-child { margin-bottom: 0; }

.doc ul, .doc ol { margin: 0 0 16px; padding-left: 24px; max-width: var(--measure); }
.doc li { margin-bottom: 7px; }
.doc li::marker { color: var(--ink-fade); }

.doc strong { font-weight: 700; }

.doc a {
  color: var(--blue-deep);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.doc a:hover { color: var(--coral); }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--coral-mark);
  outline-offset: 3px;
  border-radius: 3px;
}

.callout {
  background: var(--sunken);
  border-left: 3px solid var(--blue);
  border-radius: 0 10px 10px 0;
  padding: 14px 18px;
  margin: 0 0 16px;
  font-size: 15px;
  color: var(--ink-soft);
  max-width: var(--measure);
}

.callout.warn { border-left-color: var(--coral-mark); background: var(--coral-wash); }
.callout.warn strong { color: var(--coral); }

.callout p:last-child { margin-bottom: 0; }

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  margin: 0 0 18px;
  box-shadow: var(--shadow-sm);
}

table { border-collapse: collapse; width: 100%; font-size: 14.5px; }

th, td {
  text-align: left;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
  line-height: 1.7;
}

th {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--ink-fade);
  font-weight: 500;
  white-space: nowrap;
  background: var(--sunken);
}

tbody tr:last-child td { border-bottom: 0; }
td:first-child { font-weight: 500; min-width: 130px; }
td { color: var(--ink-soft); }
td strong { color: var(--ink); }

.entity {
  background: var(--coral-wash);
  color: var(--coral);
  padding: 0 5px;
  border-radius: 4px;
  font-weight: 500;
}

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: .88em;
  background: var(--sunken);
  border: 1px solid var(--line-soft);
  border-radius: 5px;
  padding: 1px 6px;
  color: var(--blue-deep);
}

/* ── 支援頁的問答 ─────────────────────────────────────────────────── */

.faq {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-bottom: 18px;
}

.faq details { border-bottom: 1px solid var(--line-soft); }
.faq details:last-child { border-bottom: 0; }

.faq summary {
  padding: 15px 22px;
  cursor: pointer;
  font-weight: 500;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  transition: background .15s ease;
}

.faq summary::-webkit-details-marker { display: none; }
.faq summary:hover { background: var(--sunken); }

.faq summary::after {
  content: "+";
  color: var(--ink-fade);
  font-size: 19px;
  line-height: 1;
  flex: 0 0 auto;
}

.faq details[open] summary::after { content: "−"; }

.faq .answer { padding: 0 22px 18px; color: var(--ink-soft); font-size: 15px; }
.faq .answer p { margin: 0 0 10px; }
.faq .answer p:last-child { margin-bottom: 0; }

/* ── 大按鈕 ───────────────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  background: var(--blue);
  color: #fff;
  font-weight: 500;
  font-size: 15px;
  text-decoration: none;
  border: 0;
  box-shadow: var(--shadow-sm);
  transition: background .15s ease;
}

.btn:hover { background: var(--blue-deep); color: #fff; }

/* ── 頁尾 ─────────────────────────────────────────────────────────── */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--sunken);
  padding: 48px 0 60px;
  margin-top: 0;
}

.site-footer .inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: space-between;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-size: 14.5px;
}

.site-footer a { color: var(--ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--coral); text-decoration: underline; text-underline-offset: 3px; }

.site-footer .legal {
  font-size: 13px;
  color: var(--ink-fade);
  line-height: 1.85;
  max-width: 44ch;
}

@media (max-width: 640px) {
  .hero { padding: 64px 0 52px; }
  .doc { padding: 40px 20px 72px; }
  .wrap { padding: 0 20px; }
  .site-header .inner { padding: 12px 20px; }
  .site-footer .inner { padding: 0 20px; flex-direction: column; gap: 24px; }
  th, td { padding: 11px 14px; }
}