/* 支援、隱私權、使用條款三頁共用樣式（沿用首頁冰晶藍配色） */
:root {
  --bg: #F4F8FF;
  --surface: rgba(255, 255, 255, .78);
  --border: rgba(255, 255, 255, .9);
  --accent: #1D8EFF;
  --accent-deep: #0D72DB;
  --accent-soft: #D7EDFF;
  --ink: #0F2338;
  --text: #48617D;
  --muted: #7E96B0;
  --line: rgba(15, 35, 56, .08);
  --shadow: 0 12px 28px rgba(13, 80, 150, .08), 0 2px 6px rgba(13, 80, 150, .04);
  --font: "Noto Sans TC", "PingFang TC", "Heiti TC", system-ui, sans-serif;
  --font-display: "Lexend", "Noto Sans TC", "PingFang TC", system-ui, sans-serif;
  color-scheme: light;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: radial-gradient(120% 60% at 50% 0%, color-mix(in srgb, var(--accent-soft) 70%, transparent), transparent 70%), var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font: 400 16px/1.8 var(--font);
  word-break: keep-all;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent-deep); }
.top { max-width: 760px; margin: 0 auto; padding: 24px 16px 0; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 700 20px var(--font-display); color: var(--ink); text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.back { font-size: 14px; text-decoration: none; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font: 800 clamp(28px, 5vw, 38px)/1.3 var(--font); color: var(--ink); margin: 0 0 6px; }
.updated { font-size: 13px; color: var(--muted); margin: 0 0 28px; }
.lead { font-size: 17px; margin: 0 0 28px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 24px; box-shadow: var(--shadow); padding: clamp(20px, 4vw, 32px); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); }
.card + .card { margin-top: 20px; }
h2 { font-size: 19px; color: var(--ink); margin: 28px 0 8px; }
.card > h2:first-child { margin-top: 0; }
p { margin: 0 0 12px; }
ul { padding-left: 22px; margin: 0 0 12px; }
li + li { margin-top: 6px; }
strong { color: var(--ink); }
.contact { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 16px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 99px; background: var(--accent); color: #fff; font-weight: 700; text-decoration: none; box-shadow: 0 6px 16px rgba(29, 142, 255, .28); transition: transform .2s ease, box-shadow .2s ease; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 22px rgba(29, 142, 255, .32); }
.btn svg { width: 18px; height: 18px; }
.mail { font-weight: 700; color: var(--ink); user-select: all; }
details { border-top: 1px solid var(--line); padding: 14px 0; }
details:first-of-type { border-top: 0; padding-top: 0; }
summary { cursor: pointer; font-weight: 700; color: var(--ink); list-style: none; display: flex; justify-content: space-between; gap: 12px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--accent); font-weight: 400; font-size: 20px; line-height: 1; transition: transform .2s ease; }
details[open] summary::after { transform: rotate(45deg); }
details p { margin: 8px 0 0; }
footer { max-width: 760px; margin: 0 auto; padding: 0 16px 40px; display: flex; flex-wrap: wrap; gap: 8px 20px; font-size: 13px; color: var(--muted); }
footer a { color: var(--muted); text-decoration: none; }
footer a:hover, footer a[aria-current] { color: var(--accent-deep); }
footer span { margin-right: auto; }