/* ==========================================================================
   海馬博一 kaibaboy.com.tw — Engineering Studio（冷灰紙面＋鈷藍單一強調色）
   設計規則：taste-skill / redesign-skill 審計後重寫，2026-07-19
   - 一個強調色（鈷藍 #2F4BD6），一個灰家族（冷灰），全站單一亮色主題
   - 圓角規則：互動元件 10px、卡片 16px、手機殼 46px、印章圓形
   - App 相關圖像（手機示意圖、印章、燈號）保留 App 實際色值＝產品照片
   ========================================================================== */

:root {
  /* 網站底色（冷灰家族） */
  --paper: #FBFBFA;
  --paper-tint: #F3F5F6;
  --surface: #FFFFFF;
  --line: #E5E8EB;
  --line-strong: #D3D8DD;
  --ink: #171C22;
  --ink-2: #5B646E;

  /* 唯一強調色：鈷藍 */
  --cobalt: #2F4BD6;
  --cobalt-deep: #2439A9;
  --cobalt-soft: #EBEEFB;

  /* App 產品色（僅用於 App 圖像與燈號語意，非網站色） */
  --app-cream: #FAF5EC;
  --app-sand: #EBE1CE;
  --app-ink: #2B2620;
  --app-ink-soft: #776C5C;
  --app-dark: #1E1913;
  --safe: #3E8E4D;
  --caution: #DB9E2B;
  --caution-text: #8A5A0C;
  --alert: #BF4B3E;

  /* 字體 */
  --font-display: "Space Grotesk", "Noto Sans TC", -apple-system, sans-serif;
  --font-body: "Noto Sans TC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-app: "Noto Serif TC", ui-serif, Georgia, serif; /* 僅 App 圖像內使用 */

  /* 圓角 */
  --r-ui: 10px;
  --r-card: 16px;

  /* 陰影（冷灰 tint，無純黑） */
  --shadow-card: 0 1px 2px rgba(23, 28, 34, 0.05), 0 4px 14px rgba(23, 28, 34, 0.05);
  --shadow-lift: 0 6px 24px rgba(23, 28, 34, 0.10);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.25;
  margin: 0 0 14px;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-wrap: balance;
}
p { margin: 0 0 16px; }
a { color: var(--cobalt); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
img, svg { max-width: 100%; }
ul, ol { padding-left: 1.4em; }

.container {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}
.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip: rect(0 0 0 0); overflow: hidden; white-space: nowrap;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 251, 250, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; gap: 16px;
}
.brand {
  display: flex; align-items: center; gap: 11px;
  font-weight: 700; font-size: 18px; color: var(--ink);
}
.brand:hover { text-decoration: none; }
.brand .logo-mark { width: 34px; height: 34px; flex: none; }
.brand .brand-en {
  display: block;
  font-family: var(--font-display);
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.3em; color: var(--ink-2);
}
.brand .brand-text { line-height: 1.25; }

.site-nav { display: flex; align-items: center; gap: 2px; }
.site-nav a {
  padding: 8px 14px;
  border-radius: var(--r-ui);
  font-size: 15px; font-weight: 500;
  color: var(--ink);
}
.site-nav a:hover { background: var(--paper-tint); color: var(--ink); text-decoration: none; }
.site-nav a.nav-cta {
  background: var(--cobalt); color: #fff; margin-left: 8px;
  padding: 8px 18px;
}
.site-nav a.nav-cta:hover { background: var(--cobalt-deep); color: #fff; }

.nav-toggle {
  display: none;
  border: 1px solid var(--line-strong); background: var(--surface);
  border-radius: var(--r-ui); padding: 8px; cursor: pointer; color: var(--ink);
}
.nav-toggle svg { width: 22px; height: 22px; display: block; }

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 12px 24px 18px;
  }
  .site-nav.open { display: flex; }
  .site-nav a.nav-cta { margin-left: 0; text-align: center; }
}

/* ---------- Hero（左文右機） ---------- */
.hero {
  position: relative;
  padding: 76px 0 92px;
  background:
    radial-gradient(720px 340px at 88% -10%, rgba(47, 75, 214, 0.06), transparent 70%),
    var(--paper);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  align-items: center;
  gap: clamp(32px, 5vw, 76px);
}
.hero-eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 13px; font-weight: 500; letter-spacing: 0.14em;
  color: var(--cobalt);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(32px, 4.4vw, 50px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.24;
  margin-bottom: 18px;
}
.hero .hero-sub {
  font-size: 17px; color: var(--ink-2);
  max-width: 30em; margin-bottom: 30px;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-proof {
  margin-top: 36px;
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; color: var(--ink-2);
  border-top: 1px solid var(--line);
  padding-top: 22px;
  max-width: 30em;
}
.hero-proof .logo-hippo { width: 30px; height: 30px; flex: none; }

.hero-bubbles, .hero-wave { display: none; }

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px;
  border-radius: var(--r-ui);
  border: 1.5px solid transparent;
  font-family: var(--font-body);
  font-size: 15.5px; font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0) scale(0.98); }
.btn-primary, .btn-solid { background: var(--cobalt); color: #fff; }
.btn-primary:hover, .btn-solid:hover { background: var(--cobalt-deep); color: #fff; box-shadow: var(--shadow-lift); }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); background: var(--surface); }
.btn-ghost:hover { border-color: var(--ink); }
.btn-outline { border-color: var(--cobalt); color: var(--cobalt); background: transparent; }
.btn-outline:hover { background: var(--cobalt-soft); }

/* ---------- 區段 ---------- */
.section { padding: 92px 0; }
.section-alt {
  background: var(--paper-tint);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
/* 區段標頭：左對齊，內文限 65ch */
.section-head { max-width: 720px; margin: 0 0 48px; text-align: left; }
.eyebrow { display: none; } /* 反模板：區段一律不用 eyebrow 標籤 */
.section-head h2 { font-size: clamp(25px, 3.2vw, 34px); }
.section-head p { color: var(--ink-2); font-size: 16.5px; margin-bottom: 0; max-width: 40em; }

/* ---------- 服務卡（2×2 錯位） ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.card {
  background: var(--surface);
  border-radius: var(--r-card);
  padding: 32px 30px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
@media (min-width: 861px) {
  .card-grid > .card:nth-child(even) { transform: translateY(16px); }
  .card-grid > .card:nth-child(even):hover { transform: translateY(13px); }
}
.card-icon {
  width: 44px; height: 44px;
  border-radius: var(--r-ui);
  background: var(--cobalt-soft);
  color: var(--cobalt);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.card-icon svg { width: 23px; height: 23px; }
.card h3 { font-size: 19px; margin-bottom: 6px; }
.card-tagline {
  font-size: 13.5px; font-weight: 500; color: var(--cobalt);
  margin-bottom: 12px;
}
.card p { font-size: 15px; color: var(--ink-2); margin-bottom: 0; line-height: 1.8; }

/* ---------- 河馬眼睛區與產品頁介紹 ---------- */
.app-highlight {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 5vw, 76px);
  align-items: center;
}
.badge-dev {
  display: inline-block;
  background: var(--cobalt-soft);
  color: var(--cobalt-deep);
  font-family: var(--font-display);
  font-size: 13px; font-weight: 500; letter-spacing: 0.06em;
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 18px;
}
.badge-live {
  display: inline-block;
  background: #E3F1E6;
  color: #1E6B33;
  font-family: var(--font-display);
  font-size: 13px; font-weight: 500; letter-spacing: 0.06em;
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 18px;
}
.app-highlight h2 { font-size: clamp(25px, 3.2vw, 33px); }
.app-desc { color: var(--ink-2); font-size: 16.5px; }
.app-desc strong { color: var(--ink); }

/* 三燈號印章（App 產品圖像：保留 App 原色與襯線字） */
.stamp-trio { display: flex; gap: clamp(14px, 2.4vw, 30px); }
.stamp {
  position: relative;
  width: 104px; height: 104px;
  border-radius: 50%;
  border: 2.5px solid var(--safe);
  color: var(--safe);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 1px;
  transform: rotate(-8deg);
  background: var(--surface);
  flex: none;
}
.stamp::before {
  content: "";
  position: absolute; inset: 5px;
  border-radius: 50%;
  border: 1px solid currentColor;
  opacity: 0.45;
}
.stamp b {
  font-family: var(--font-app);
  font-weight: 900; font-size: 27px; line-height: 1.1;
}
.stamp span { font-size: 11.5px; font-weight: 700; letter-spacing: 0.28em; text-indent: 0.28em; }
.stamp.caution { border-color: var(--caution); color: var(--caution-text); }
.stamp.alert { border-color: var(--alert); color: var(--alert); }
.stamp-trio .stamp:nth-child(2) { transform: rotate(5deg) translateY(10px); }
.stamp-trio .stamp:nth-child(3) { transform: rotate(-4deg); }
.stamp-showcase {
  display: flex; align-items: center; justify-content: center;
  min-height: 240px;
  background: var(--surface);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  padding: 40px 20px;
}
.stamp-showcase .stamp { width: clamp(100px, 10vw, 128px); height: clamp(100px, 10vw, 128px); background: var(--app-cream); }
.stamp-showcase .stamp b { font-size: clamp(26px, 2.6vw, 32px); }

.traffic-pills { display: grid; gap: 12px; margin: 24px 0 30px; }
.traffic-pill {
  display: flex; align-items: flex-start; gap: 13px;
  background: var(--surface);
  border-radius: var(--r-card);
  padding: 14px 18px;
  box-shadow: var(--shadow-card);
}
.traffic-pill .dot {
  width: 12px; height: 12px; border-radius: 50%;
  margin-top: 8px; flex: none;
}
.traffic-pill.green .dot { background: var(--safe); }
.traffic-pill.yellow .dot { background: var(--caution); }
.traffic-pill.red .dot { background: var(--alert); }
.traffic-pill strong { display: block; font-size: 15.5px; margin-bottom: 1px; }
.traffic-pill.green strong { color: var(--safe); }
.traffic-pill.yellow strong { color: var(--caution-text); }
.traffic-pill.red strong { color: var(--alert); }
.traffic-pill span { font-size: 14px; color: var(--ink-2); line-height: 1.65; }

/* ---------- 手機示意圖（App 產品圖像：內部完全維持 App 的 Warm Minimal） ---------- */
.phone-wrap { display: flex; justify-content: center; }
.phone {
  width: min(320px, 88vw);
  background: var(--app-dark);
  border-radius: 46px;
  padding: 12px;
  box-shadow: var(--shadow-lift);
}
.phone-screen {
  position: relative;
  background: var(--app-cream);
  border-radius: 36px;
  padding: 40px 14px 18px;
  overflow: hidden;
}
.phone-notch {
  position: absolute; top: 12px; left: 50%;
  transform: translateX(-50%);
  width: 96px; height: 22px;
  background: var(--app-dark);
  border-radius: 999px;
}
.mock-top {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px; padding: 0 2px;
}
.mock-top .mock-title {
  font-family: var(--font-app);
  font-weight: 900; font-size: 18px; color: var(--app-ink);
}
.mock-circle {
  width: 32px; height: 32px; flex: none;
  border: 1px solid var(--app-sand);
  background: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--app-ink-soft); font-size: 14px;
}
.mock-card {
  background: #fff;
  border: 1px solid var(--app-sand);
  border-radius: 20px;
  padding: 14px;
  margin-bottom: 10px;
}
.mock-verdict { display: flex; align-items: center; gap: 14px; }
.mock-verdict .stamp { width: 86px; height: 86px; background: #fff; }
.mock-verdict .stamp b { font-size: 22px; }
.mock-verdict .stamp span { font-size: 10px; }
.mock-verdict-info { flex: 1; min-width: 0; }
.mock-verdict-info strong {
  display: block;
  font-family: var(--font-app);
  font-size: 17px; font-weight: 900;
  color: var(--app-ink);
  margin-bottom: 8px;
}
.risk-band { display: flex; gap: 3px; height: 10px; margin-bottom: 7px; }
.risk-band i { flex: 1; border-radius: 3px; background: var(--safe); }
.risk-band i.c { background: var(--caution); }
.risk-band i.a { background: var(--alert); }
.mock-stats { font-size: 11.5px; color: var(--app-ink-soft); }
.mock-section-title {
  font-family: var(--font-app);
  font-weight: 900; font-size: 14px; color: var(--app-ink);
  margin: 0 2px 8px;
}
.mock-row {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 8px 2px;
  font-size: 13.5px;
}
.mock-row + .mock-row { border-top: 1px solid var(--app-sand); }
.mock-row .mock-name { font-weight: 500; color: var(--app-ink); }
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  font-style: normal; font-size: 12px; font-weight: 700;
}
.chip::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: currentColor;
}
.chip.safe { color: var(--safe); }
.chip.caution { color: var(--caution-text); }
.chip.caution::before { background: var(--caution); }
.chip.alert { color: var(--alert); }
.mock-ok { color: var(--safe); font-size: 12.5px; font-weight: 700; }
.mock-disclaimer {
  margin: 4px 6px 0;
  font-size: 10.5px; color: var(--app-ink-soft);
  text-align: center;
}

/* ---------- 關於我們 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(32px, 5vw, 76px);
}
.about-body h2 { font-size: clamp(25px, 3.2vw, 33px); }
.about-body p { color: var(--ink-2); font-size: 16px; max-width: 40em; }
.why-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 4px; }
.why-list li {
  display: flex; gap: 13px;
  padding: 16px 4px;
}
.why-list li + li { border-top: 1px solid var(--line); }
.why-list .check {
  width: 26px; height: 26px; flex: none;
  border-radius: 50%;
  background: var(--cobalt-soft); color: var(--cobalt);
  display: flex; align-items: center; justify-content: center;
  margin-top: 2px;
}
.why-list .check svg { width: 13px; height: 13px; }
.why-list strong { display: block; font-size: 15.5px; margin-bottom: 2px; }
.why-list span { font-size: 14px; color: var(--ink-2); line-height: 1.65; }

/* ---------- 聯絡 CTA ---------- */
.contact-box {
  background: var(--surface);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  padding: clamp(40px, 6vw, 60px);
  max-width: 760px;
}
.contact-box h2 { font-size: clamp(23px, 3vw, 29px); }
.contact-box p { color: var(--ink-2); max-width: 34em; margin-bottom: 26px; }
.email-line { margin: 18px 0 0; font-size: 14.5px; color: var(--ink-2); }

/* ---------- 頁尾（同色調亮色，不跳深色） ---------- */
.site-footer {
  background: var(--paper-tint);
  border-top: 1px solid var(--line);
  color: var(--ink);
  padding: 60px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr) minmax(0, 0.8fr);
  gap: 40px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line-strong);
}
.footer-brand {
  display: flex; align-items: center; gap: 11px;
  font-weight: 700; font-size: 18px;
  margin-bottom: 16px;
}
.footer-brand .logo-mark { width: 32px; height: 32px; }
.footer-note { font-size: 13.5px; line-height: 1.9; color: var(--ink-2); }
.footer-note a { color: var(--cobalt); }
.site-footer h4 {
  font-size: 14.5px; margin-bottom: 14px; color: var(--ink);
}
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.site-footer ul a { color: var(--ink-2); font-size: 14px; }
.site-footer ul a:hover { color: var(--cobalt); }
.footer-bottom {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
  padding-top: 20px;
  font-size: 12.5px; color: var(--ink-2);
}
.footer-bottom a { color: var(--ink-2); }

/* ---------- 內頁 hero ---------- */
.page-hero {
  padding: 68px 0 52px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(640px 280px at 88% -10%, rgba(47, 75, 214, 0.06), transparent 70%),
    var(--paper);
}
.page-hero h1 { font-size: clamp(30px, 4.2vw, 44px); margin-bottom: 10px; letter-spacing: -0.02em; }
.page-hero p { color: var(--ink-2); font-size: 17px; max-width: 40em; margin-bottom: 0; }

/* ---------- 使用步驟（真實順序，數字有意義） ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0;
  background: var(--surface);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.step { padding: 30px 26px; }
.step + .step { border-left: 1px solid var(--line); }
@media (max-width: 960px) {
  .step + .step { border-left: 0; border-top: 1px solid var(--line); }
}
.step-num {
  font-family: var(--font-display);
  font-weight: 700; font-size: 15px;
  color: var(--cobalt);
  margin-bottom: 12px;
}
.step-num::before { content: "0"; }
.step p { font-size: 15px; color: var(--ink-2); margin: 0; line-height: 1.8; }

/* ---------- 分級標準（燈號＝App 語意色） ---------- */
.std-block {
  background: var(--surface);
  border-radius: var(--r-card);
  padding: 28px 30px;
  margin-bottom: 18px;
  box-shadow: var(--shadow-card);
}
.std-block h3 {
  display: flex; align-items: center; gap: 10px;
  font-size: 18.5px; margin-bottom: 12px;
}
.std-block h3 .dot { width: 13px; height: 13px; border-radius: 50%; flex: none; }
.std-block.green { border-left: 4px solid var(--safe); }
.std-block.green h3 { color: var(--safe); }
.std-block.green h3 .dot { background: var(--safe); }
.std-block.yellow { border-left: 4px solid var(--caution); }
.std-block.yellow h3 { color: var(--caution-text); }
.std-block.yellow h3 .dot { background: var(--caution); }
.std-block.red { border-left: 4px solid var(--alert); }
.std-block.red h3 { color: var(--alert); }
.std-block.red h3 .dot { background: var(--alert); }
.std-block p, .std-block li { color: var(--ink-2); font-size: 15px; }
.std-block p:last-child { margin-bottom: 0; }
.std-block strong { color: var(--ink); }

.disclaimer {
  background: var(--surface);
  border: 1px solid var(--caution);
  border-radius: var(--r-card);
  padding: 26px 30px;
  font-size: 15px;
  color: var(--ink);
}
.disclaimer > strong {
  font-family: var(--font-display);
  font-size: 16.5px;
  color: var(--caution-text);
}
.disclaimer li { margin-bottom: 8px; }
.disclaimer li:last-child { margin-bottom: 0; }
.disclaimer li strong { color: var(--caution-text); }

/* 舊表格樣式（保留以防外部快取頁面） */
.table-scroll { overflow-x: auto; }
.std-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.std-table th, .std-table td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }

/* ---------- FAQ ---------- */
.faq-list { display: grid; gap: 0; max-width: 860px; background: var(--surface); border-radius: var(--r-card); box-shadow: var(--shadow-card); overflow: hidden; }
.faq-item + .faq-item { border-top: 1px solid var(--line); }
.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 19px 24px;
  font-weight: 700; font-size: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "＋";
  flex: none;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--cobalt-soft); color: var(--cobalt);
  font-size: 14px; font-weight: 500;
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.18s ease;
}
.faq-item[open] summary::after { content: "×"; transform: rotate(180deg); }
.faq-item summary:hover { background: var(--paper-tint); }
.faq-body { padding: 0 24px 20px; }
.faq-body p { font-size: 15px; color: var(--ink-2); margin-bottom: 0; line-height: 1.85; }

/* ---------- 法律頁 prose ---------- */
.prose {
  max-width: 780px;
  background: var(--surface);
  border-radius: var(--r-card);
  padding: clamp(30px, 5vw, 56px);
  box-shadow: var(--shadow-card);
}
.prose h2 {
  font-size: 20px;
  margin: 38px 0 14px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.prose h2:first-of-type { border-top: 0; padding-top: 0; margin-top: 10px; }
.prose p, .prose li { font-size: 15.5px; color: var(--ink); }
.prose li { margin-bottom: 8px; }
.doc-meta {
  font-size: 13.5px; color: var(--ink-2);
  background: var(--paper-tint);
  border-radius: 999px;
  display: inline-block;
  padding: 6px 16px;
}
.callout {
  background: var(--cobalt-soft);
  border-radius: var(--r-ui);
  padding: 14px 18px;
  font-size: 14.5px;
  color: var(--cobalt-deep);
  margin-bottom: 8px;
}
.callout a { font-weight: 700; }

/* ---------- 進場動效（尊重 reduced-motion） ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1), transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.in { opacity: 1; transform: none; }
@media (min-width: 861px) {
  .card-grid > .card.reveal:nth-child(even) { transform: translateY(32px); }
  .card-grid > .card.reveal.in:nth-child(even) { transform: translateY(16px); }
}

html.js .stamp-pop { opacity: 0; }
.stamp-pop.in { animation: stamp-in 0.5s cubic-bezier(0.2, 0.9, 0.3, 1.2) forwards; opacity: 1; }
.stamp-trio .stamp-pop.in:nth-child(2) { animation-delay: 0.12s; }
.stamp-trio .stamp-pop.in:nth-child(3) { animation-delay: 0.24s; }
@keyframes stamp-in {
  0% { opacity: 0; transform: rotate(-8deg) scale(1.65); }
  62% { opacity: 1; transform: rotate(-8deg) scale(0.94); }
  100% { opacity: 1; transform: rotate(-8deg) scale(1); }
}
.stamp-trio .stamp:nth-child(2).stamp-pop.in { animation-name: stamp-in-2; }
@keyframes stamp-in-2 {
  0% { opacity: 0; transform: rotate(5deg) translateY(10px) scale(1.65); }
  62% { opacity: 1; transform: rotate(5deg) translateY(10px) scale(0.94); }
  100% { opacity: 1; transform: rotate(5deg) translateY(10px) scale(1); }
}
.stamp-trio .stamp:nth-child(3).stamp-pop.in { animation-name: stamp-in-3; }
@keyframes stamp-in-3 {
  0% { opacity: 0; transform: rotate(-4deg) scale(1.65); }
  62% { opacity: 1; transform: rotate(-4deg) scale(0.94); }
  100% { opacity: 1; transform: rotate(-4deg) scale(1); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .stamp-pop { opacity: 1 !important; transform: none; transition: none; animation: none !important; }
  .btn, .card { transition: none; }
}

/* ---------- 響應式 ---------- */
@media (max-width: 960px) {
  .hero-grid, .app-highlight, .about-grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 64px; }
  .hero-grid .phone-wrap { order: 2; }
  .card-grid { grid-template-columns: 1fr; }
  .card-grid > .card:nth-child(even) { transform: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .section { padding: 64px 0; }
  .stamp-trio { justify-content: center; }
  .stamp { width: 92px; height: 92px; }
  .stamp b { font-size: 23px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .contact-box { padding: 34px 22px; }
  .prose { padding: 26px 20px; }
}

/* 鍵盤焦點 */
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2.5px solid var(--cobalt);
  outline-offset: 2px;
  border-radius: 6px;
}