:root {
  --brand: #0E5A4A;
  --brand-2: #3FA88E;
  --mint: #E6F1EE;
  --accent: #FF8A5B;
  --ink: #17191C;
  --muted: #5F6368;
  --bg: #F6F7F4;
  --card: #FFFFFF;
  --line: #D9DCD5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #E9ECE8; --muted: #A3A9A5; --bg: #111413; --card: #1C201E; --line: #353B37; --mint: #183A31;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  font-size: 18px; line-height: 1.65;
}
a { color: var(--brand-2); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
header.top { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 22px; color: var(--ink); text-decoration: none; }
.logo img { width: 40px; height: 40px; }
.nav a { color: var(--muted); text-decoration: none; margin-left: 18px; font-size: 16px; }
.hero { padding: 48px 0 56px; display: grid; grid-template-columns: 1.15fr 1fr; gap: 40px; align-items: center; }
.hero h1 { font-size: clamp(32px, 5.2vw, 50px); line-height: 1.15; margin: 0 0 16px; letter-spacing: .01em; }
.hero h1 em { font-style: normal; color: var(--brand-2); }
.hero p.lead { font-size: 20px; color: var(--muted); margin: 0 0 28px; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 56px; padding: 0 26px; border-radius: 16px; font-size: 18px; font-weight: 700;
  text-decoration: none; border: 2px solid transparent; cursor: pointer;
}
.btn.primary { background: var(--brand); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { background: var(--card); color: var(--ink); border-color: var(--line); }
.btn .soon { font-size: 13px; font-weight: 500; opacity: .75; }
.phone {
  justify-self: center; width: min(320px, 80vw); aspect-ratio: 9/18; border-radius: 40px;
  background: linear-gradient(160deg, var(--brand) 0%, #0b4337 100%); padding: 14px; box-shadow: 0 30px 60px rgba(14,90,74,.25);
}
.screen { height: 100%; border-radius: 28px; background: var(--card); padding: 18px 14px; display: flex; flex-direction: column; gap: 10px; overflow: hidden; }
.bubble { max-width: 82%; padding: 10px 14px; border-radius: 18px; font-size: 15px; line-height: 1.45; }
.bubble.in { background: var(--mint); align-self: flex-start; border-bottom-left-radius: 6px; }
.bubble.out { background: var(--brand); color: #fff; align-self: flex-end; border-bottom-right-radius: 6px; }
.inputbar { margin-top: auto; height: 40px; border-radius: 20px; background: var(--bg); border: 1px solid var(--line); color: var(--muted); font-size: 14px; display: flex; align-items: center; padding: 0 14px; }
.bubble.warn { background: #FFF1E8; color: #8A3410; align-self: stretch; max-width: 100%; font-size: 14px; }
.section { padding: 56px 0; }
.section h2 { font-size: clamp(26px, 4vw, 36px); margin: 0 0 8px; }
.section p.sub { color: var(--muted); margin: 0 0 28px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 22px; }
.card .ic { font-size: 34px; }
.card h3 { margin: 8px 0 4px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); font-size: 16px; }
.band { background: var(--brand); color: #fff; border-radius: 28px; padding: 40px 32px; display: flex; flex-wrap: wrap; gap: 24px; align-items: center; justify-content: space-between; }
.band h2 { margin: 0; }
.band p { margin: 6px 0 0; opacity: .85; }
.band .btn.ghost { background: #fff; color: var(--brand); border-color: #fff; }
footer { padding: 40px 0 56px; color: var(--muted); font-size: 15px; }
footer a { color: var(--muted); }
.center { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px 20px; }
.panel { width: min(480px, 100%); background: var(--card); border: 1px solid var(--line); border-radius: 28px; padding: 32px 26px; text-align: center; }
.panel h1 { font-size: 28px; margin: 12px 0 8px; line-height: 1.3; }
.panel p { color: var(--muted); margin: 0 0 22px; }
.panel .btn { width: 100%; margin-top: 10px; }
.code { font-family: ui-monospace, Menlo, Consolas, monospace; background: var(--mint); border-radius: 12px; padding: 10px 12px; font-size: 15px; word-break: break-all; margin: 8px 0 4px; }
.hint { font-size: 15px; color: var(--muted); margin-top: 18px; }
@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; padding-top: 24px; }
  .phone { display: none; }
  .grid { grid-template-columns: 1fr; }
  .nav { display: none; }
  .band { padding: 30px 22px; }
}