:root {
  --ink: #2b2621;
  --ink-soft: #6b6259;
  --paper: #faf7f2;
  --card: #ffffff;
  --line: #e7dfd3;
  --gold: #a8834a;
  --gold-deep: #8a6a36;
  --gold-soft: #f3ead9;
  --dark: #1f1c19;
  --danger: #b4412f;
  --serif: 'Noto Serif TC', 'PMingLiU', serif;
  --sans: 'Noto Sans TC', 'Microsoft JhengHei', sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(ellipse at 50% 120%, rgba(168,131,74,.35), transparent 60%),
    linear-gradient(180deg, #1f1c19 0%, #2d2823 100%);
  color: #f6efe3;
  text-align: center;
  padding: 96px 16px 88px;
}
.hero-inner { max-width: 720px; margin: 0 auto; }
.eyebrow { letter-spacing: .4em; font-size: 13px; color: #cfb27f; margin: 0 0 16px; }
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(44px, 9vw, 76px);
  font-weight: 700;
  letter-spacing: .12em;
  margin: 0;
  line-height: 1.2;
}
.hero h1 span { color: #d9bb86; }
.lead { font-size: 17px; color: #d8cebf; margin: 24px 0 36px; }

.btn {
  display: inline-block;
  border: 0;
  border-radius: 2px;
  padding: 14px 36px;
  font: 500 16px/1 var(--sans);
  letter-spacing: .15em;
  text-decoration: none;
  cursor: pointer;
  transition: background .2s, transform .2s;
}
.btn-gold { background: var(--gold); color: #fff; }
.btn-gold:hover { background: var(--gold-deep); }
.btn-gold:active { transform: translateY(1px); }
.btn-gold:disabled { opacity: .6; cursor: wait; }
.btn-block { width: 100%; padding: 18px; }

/* ---------- Sections ---------- */
.section { max-width: 1040px; margin: 0 auto; padding: 80px 16px 0; }
.section-title {
  font-family: var(--serif);
  text-align: center;
  font-size: 30px;
  letter-spacing: .15em;
  margin: 0 0 40px;
}
.section-title small {
  display: block;
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: .4em;
  color: var(--gold);
  margin-bottom: 6px;
}
.section-sub { text-align: center; color: var(--ink-soft); margin: -24px auto 32px; max-width: 520px; }

.gifts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.gift {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  padding: 28px 24px;
}
.gift-no { font-size: 13px; letter-spacing: .3em; color: var(--gold); }
.gift h3 { font-family: var(--serif); font-size: 26px; margin: 4px 0 8px; letter-spacing: .1em; }
.gift .prize { font-weight: 700; font-size: 17px; margin: 0 0 12px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.gift p { margin: 0 0 10px; font-size: 15px; }
.gift .fine { font-size: 13px; color: var(--ink-soft); }

.points { margin-top: 28px; background: var(--card); border: 1px solid var(--line); padding: 28px 24px; }
.points h3 { font-family: var(--serif); margin: 0 0 16px; font-size: 20px; letter-spacing: .1em; }
.ladder { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.ladder li {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 14px 10px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.ladder b { font-family: var(--serif); font-size: 20px; color: var(--gold-deep); }
.ladder span { font-size: 14px; }
.ladder .hl { background: var(--gold-soft); border-color: #e2cfa9; }
.ladder .top { background: var(--dark); border-color: var(--dark); color: #f6efe3; }
.ladder .top b { color: #d9bb86; }

/* ---------- Form ---------- */
.form, .done {
  max-width: 560px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 36px 32px;
}
.row.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 500; margin-bottom: 6px; font-size: 15px; }
.field label em { color: var(--danger); font-style: normal; }
.field input[type=text], .field input[type=email], .field input[type=tel],
.field input[type=date], .field select {
  width: 100%;
  font: 16px var(--sans);
  color: var(--ink);
  padding: 12px 14px;
  border: 1px solid #d6ccbd;
  border-radius: 2px;
  background: #fff;
  min-height: 48px;
}
.field input:focus, .field select:focus { outline: 2px solid var(--gold); outline-offset: -1px; border-color: var(--gold); }
.field.invalid input, .field.invalid select { border-color: var(--danger); }
.field.check label { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: 14px; color: var(--ink-soft); cursor: pointer; }
.field.check input { width: 18px; height: 18px; margin-top: 4px; accent-color: var(--gold); flex: none; }
.err { color: var(--danger); font-size: 13px; margin: 4px 0 0; min-height: 0; }
.err:empty { display: none; }
.form-msg { color: var(--danger); text-align: center; margin: 0 0 12px; }
.form-msg:empty { display: none; }

.done { text-align: center; padding: 56px 32px; }
.done-mark {
  width: 64px; height: 64px; margin: 0 auto 16px;
  border-radius: 50%; background: var(--gold); color: #fff;
  font-size: 32px; line-height: 64px;
}
.done h3 { font-family: var(--serif); font-size: 24px; margin: 0 0 8px; letter-spacing: .1em; }
.done p { color: var(--ink-soft); margin: 0; }

/* ---------- Notes ---------- */
.notes { padding-bottom: 80px; }
.notes details { max-width: 760px; margin: 0 auto; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.notes summary { cursor: pointer; padding: 18px 4px; font-weight: 500; letter-spacing: .1em; }
.notes ol { margin: 0; padding: 0 8px 20px 28px; font-size: 14px; color: var(--ink-soft); }
.notes li { margin-bottom: 6px; }

.footer { text-align: center; padding: 28px 16px; font-size: 13px; color: #9b9187; background: var(--dark); }

@media (max-width: 820px) {
  .gifts { grid-template-columns: 1fr; }
  .ladder { grid-template-columns: repeat(2, 1fr); }
  .ladder .top { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .hero { padding: 72px 16px 64px; }
  .section { padding-top: 56px; }
  .form, .done { padding: 28px 20px; }
  .row.two { grid-template-columns: 1fr; gap: 0; }
}