/* 《我的使用說明書》產品介紹網站
   色彩取自 App 圖示：奶油底、綠→藍漸層、珊瑚紅強調。 */

:root {
  --cream: #faf5eb;
  --cream-deep: #f3ecdd;
  --card: #ffffff;
  --ink: #1e2024;
  --ink-soft: #55595f;
  --ink-faint: #85898f;
  --accent: #4a82c7;
  --accent-deep: #35659f;
  --mint: #6bbf94;
  --coral: #eb7a6b;
  --hairline: rgba(0, 0, 0, 0.08);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 8px 24px rgba(0, 0, 0, 0.05);
  --radius: 18px;
  --radius-sm: 12px;
  --max: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC",
    "PingFang TC", "Microsoft JhengHei", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --cream: #121316;
    --cream-deep: #17181c;
    --card: #1d1f23;
    --ink: #f0f1f3;
    --ink-soft: #b3b7bd;
    --ink-faint: #83878d;
    --accent: #74a8e8;
    --accent-deep: #9cc3f2;
    --mint: #7fd0a6;
    --coral: #f4897a;
    --hairline: rgba(255, 255, 255, 0.1);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--cream);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-wrap: pretty;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent-deep); text-underline-offset: 3px; }
a:hover { color: var(--accent); }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--card);
  padding: 0.75rem 1.25rem;
  z-index: 100;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }

/* ---------- 導覽 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--cream) 88%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--hairline);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  min-height: 64px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
}
.brand img { width: 34px; height: 34px; border-radius: 9px; }

.nav a:not(.brand) {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  padding: 0.4rem 0;
}
.nav a:not(.brand):hover { color: var(--ink); }

/* ---------- 通用區塊 ---------- */

section { padding: clamp(3rem, 8vw, 5.5rem) 0; }

h1, h2, h3 { line-height: 1.3; text-wrap: balance; margin: 0 0 0.6em; }
h1 { font-size: clamp(2.1rem, 6vw, 3.4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3.6vw, 2.1rem); letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; }

.lede { font-size: clamp(1.05rem, 2.4vw, 1.3rem); color: var(--ink-soft); max-width: 46ch; }
.section-intro { max-width: 52ch; color: var(--ink-soft); margin-bottom: 2.5rem; }

.eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-deep);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

/* ---------- Hero ---------- */

.hero {
  background: linear-gradient(180deg, var(--cream-deep), var(--cream));
  padding-top: clamp(2.5rem, 6vw, 4.5rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; }
}

.hero-icon {
  width: 88px;
  height: 88px;
  border-radius: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.hero-art {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--hairline);
}

.btn-row { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-top: 2rem; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  min-height: 48px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--mint), var(--accent));
  color: #fff;
  box-shadow: var(--shadow);
}
.btn-primary:hover { color: #fff; }

.btn-ghost {
  background: var(--card);
  color: var(--ink);
  border-color: var(--hairline);
}
.btn-ghost:hover { color: var(--ink); }

.badge-soon {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-deep);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

/* ---------- 卡片格線 ---------- */

.grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 1.6rem;
  box-shadow: var(--shadow);
}

.card h3 { margin-bottom: 0.4rem; }
.card p { margin: 0; color: var(--ink-soft); font-size: 0.96rem; }

.card-icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent-deep);
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

/* ---------- 情境膠囊 ---------- */

.chips { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.chip {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 0.55rem 1.1rem;
  font-size: 0.94rem;
  color: var(--ink-soft);
  box-shadow: var(--shadow);
}

/* ---------- 對照區 ---------- */

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 1.25rem;
  align-items: start;
}

.alt { background: var(--cream-deep); }

/* ---------- 隱私 ---------- */

.privacy-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.privacy-list li {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  color: var(--ink-soft);
}
.privacy-list strong { color: var(--ink); display: block; }
.tick { color: var(--mint); font-weight: 700; flex: none; }
.cross { color: var(--coral); font-weight: 700; flex: none; }

/* ---------- 價格 ---------- */

.price-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
}

.price-card { position: relative; }
.price-card.featured { border-color: var(--accent); border-width: 2px; }

.price-tag {
  font-size: 2.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0.5rem 0 0.25rem;
}
.price-tag span { font-size: 1rem; font-weight: 500; color: var(--ink-faint); }

.feature-list { list-style: none; padding: 0; margin: 1.25rem 0 0; display: grid; gap: 0.55rem; }
.feature-list li { display: flex; gap: 0.6rem; font-size: 0.95rem; color: var(--ink-soft); }

.ribbon {
  position: absolute;
  top: -12px;
  right: 1.4rem;
  background: linear-gradient(135deg, var(--mint), var(--accent));
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.25rem 0.85rem;
  border-radius: 999px;
}

/* ---------- 表格 ---------- */

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  font-size: 0.95rem;
}
th, td { padding: 0.85rem 1rem; text-align: left; border-bottom: 1px solid var(--hairline); }
th { font-weight: 700; background: var(--cream-deep); }
tbody tr:last-child td { border-bottom: none; }
td:not(:first-child), th:not(:first-child) { text-align: center; }

/* ---------- FAQ ---------- */

details {
  background: var(--card);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.35rem;
  margin-bottom: 0.85rem;
  box-shadow: var(--shadow);
}
summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  min-height: 28px;
  align-items: center;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "＋"; color: var(--accent); font-weight: 700; flex: none; }
details[open] summary::after { content: "－"; }
details p { color: var(--ink-soft); margin: 0.8rem 0 0; }

/* ---------- 表單 ---------- */

.form-card { max-width: 620px; }

label { display: block; font-weight: 600; margin-bottom: 0.4rem; font-size: 0.95rem; }

input, select, textarea {
  width: 100%;
  font: inherit;
  font-size: 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--hairline);
  background: var(--cream);
  color: var(--ink);
  margin-bottom: 1.1rem;
  min-height: 48px;
}
textarea { min-height: 150px; resize: vertical; line-height: 1.7; }

.hint { font-size: 0.86rem; color: var(--ink-faint); margin: -0.75rem 0 1.1rem; }

button.btn { cursor: pointer; font: inherit; font-weight: 600; }

.hp { position: absolute; left: -9999px; }

/* ---------- 內文頁 ---------- */

.doc { max-width: 68ch; }
.doc h2 { margin-top: 2.5rem; }
.doc h3 { margin-top: 1.75rem; }
.doc ul { padding-left: 1.3rem; color: var(--ink-soft); }
.doc li { margin-bottom: 0.4rem; }
.doc p { color: var(--ink-soft); }
.doc strong { color: var(--ink); }
.updated { color: var(--ink-faint); font-size: 0.9rem; }

/* ---------- 頁尾 ---------- */

.site-footer {
  border-top: 1px solid var(--hairline);
  background: var(--cream-deep);
  padding: 3rem 0 2.5rem;
  font-size: 0.93rem;
}
.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
}
.site-footer h4 { margin: 0 0 0.7rem; font-size: 0.95rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.45rem; }
.site-footer a { color: var(--ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--ink); text-decoration: underline; }
.copyright { margin-top: 2.5rem; color: var(--ink-faint); }

/* ---------- 404 ---------- */

.center-page {
  min-height: 68vh;
  display: grid;
  place-items: center;
  text-align: center;
}

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