/* 帳單捕手 BillCatch — 官網共用樣式。不載入任何外部字型或資源。 */
:root {
  --brand: #0f5f59;
  --brand-dark: #0a4642;
  --brand-tint: #e7f3f1;
  --accent: #f5a524;
  --text: #1b2928;
  --muted: #475856;
  --line: #d5e2e0;
  --bg: #ffffff;
  --bg-soft: #f6faf9;
  --radius: 14px;
  --max: 64rem;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC",
    "Microsoft JhengHei", "Heiti TC", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.75;
  overflow-wrap: anywhere;
}

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

a { color: var(--brand); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--brand-dark); text-decoration-thickness: 2px; }
a:focus-visible, .skip-link:focus { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: var(--brand-tint);
  padding: 0.05em 0.35em;
  border-radius: 4px;
  overflow-wrap: anywhere;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.5rem;
  background: var(--bg);
  padding: 0.5rem 1rem;
  z-index: 10;
}
.skip-link:focus { left: 0.5rem; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
.wrap.narrow { max-width: 48rem; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); }
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.2;
}
.brand img { width: 40px; height: 40px; }
.brand:hover { color: var(--brand-dark); }
.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.25rem 1.1rem; }
.site-nav a { text-decoration: none; font-size: 0.95rem; color: var(--muted); }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--brand); text-decoration: underline; }

/* Sections */
main { display: block; }
section { padding: 3rem 0; }
section + section { border-top: 1px solid var(--line); }
h1, h2, h3 { line-height: 1.35; color: var(--text); }
h1 { font-size: clamp(1.9rem, 5vw, 2.7rem); margin: 0 0 0.75rem; }
h2 { font-size: clamp(1.4rem, 3.4vw, 1.8rem); margin: 0 0 1rem; }
h3 { font-size: 1.15rem; margin: 1.75rem 0 0.5rem; }
p { margin: 0 0 1rem; }
ul, ol { padding-left: 1.4rem; margin: 0 0 1rem; }
li { margin-bottom: 0.45rem; }

/* Hero */
.hero { background: var(--bg-soft); padding: 3.5rem 0 3rem; }
.hero-grid { display: grid; gap: 1.5rem; align-items: center; grid-template-columns: 1fr; }
.hero-logo { width: 112px; height: 112px; }
.hero .lead { font-size: clamp(1.25rem, 3vw, 1.55rem); font-weight: 600; color: var(--brand-dark); margin-bottom: 0.75rem; }
.hero p { max-width: 40rem; }
.highlights { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 1.25rem 0; }
.highlights li {
  margin: 0;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.3rem 0.9rem;
  font-size: 0.95rem;
}
.store-soon {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding: 0.65rem 1.2rem;
  border-radius: 12px;
  border: 2px dashed var(--muted);
  color: var(--muted);
  font-weight: 600;
  background: var(--bg);
  cursor: default;
  user-select: none;
}
@media (min-width: 46rem) {
  .hero-grid { grid-template-columns: auto 1fr; gap: 2.5rem; }
  .hero-logo { width: 152px; height: 152px; }
}

/* Steps */
.steps { counter-reset: step; list-style: none; padding: 0; display: grid; gap: 1rem; }
.steps li {
  counter-increment: step;
  position: relative;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem 1rem 3.6rem;
  margin: 0;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  left: 1rem;
  top: 1rem;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  display: grid;
  place-items: center;
  line-height: 1;
}
@media (min-width: 46rem) { .steps { grid-template-columns: 1fr 1fr; } }

.card-list { list-style: none; padding: 0; }
.card-list li { border-left: 4px solid var(--brand); padding: 0.25rem 0 0.25rem 0.9rem; margin-bottom: 0.9rem; }
.card-list.warn li { border-left-color: var(--accent); }

.banks { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.banks li { margin: 0; padding: 0.35rem 0.95rem; border-radius: 999px; background: var(--brand-tint); color: var(--brand-dark); font-weight: 600; }

.faq h3 { margin-top: 1.5rem; }

.en-summary { background: var(--bg-soft); }

.toc { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.9rem 1.2rem; margin: 0 0 1.5rem; }
.toc h2, .doc .toc h2 { font-size: 1.05rem; margin: 0 0 0.4rem; padding: 0; }
.toc ol { margin: 0; }
.toc li { margin-bottom: 0.2rem; }

/* Legal / document pages */
.doc { padding: 2.5rem 0 3rem; }
.doc h1 { font-size: clamp(1.6rem, 4.4vw, 2.2rem); }
.doc h2 { margin-top: 2.25rem; padding-top: 0.5rem; }
.doc section { padding: 0; border-top: 0; }
.doc section + section { margin-top: 3rem; padding-top: 2rem; border-top: 2px solid var(--line); }
.lang-switch { font-size: 0.95rem; color: var(--muted); margin-bottom: 1.5rem; }
.lang-switch a { font-weight: 600; }
.meta { color: var(--muted); font-size: 0.95rem; }
.notice {
  background: #fff7e6;
  border: 1px solid #f0c674;
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin: 1rem 0 1.5rem;
}
.doc ol.howto > li { margin-bottom: 0.6rem; }
.doc .step-block { background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.2rem; margin: 1rem 0 1.5rem; }
.doc .step-block h3 { margin-top: 0.25rem; }

.table-wrap { overflow-x: auto; margin: 0 0 1.25rem; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; min-width: 32rem; font-size: 0.97rem; }
th, td { border: 1px solid var(--line); padding: 0.55rem 0.7rem; text-align: left; vertical-align: top; }
th { background: var(--brand-tint); }

/* Footer */
.site-footer { background: #10302d; color: #e8f1f0; padding: 2.25rem 0 2.5rem; font-size: 0.95rem; }
.site-footer a { color: #ffffff; }
.site-footer p { margin: 0 0 0.6rem; }
.footer-links { list-style: none; padding: 0; margin: 0.75rem 0; display: flex; flex-wrap: wrap; gap: 0.25rem 1.25rem; }
.footer-links li { margin: 0; }
.footer-company span { display: block; }
@media (min-width: 46rem) {
  .footer-company span { display: inline; }
  .footer-company span + span::before { content: "｜"; padding: 0 0.15rem; color: #9fbcb8; }
}
.trademark { color: #c9dbd8; }

@media print {
  .site-header nav, .skip-link { display: none; }
  .site-footer { background: none; color: var(--text); }
  .site-footer a { color: var(--text); }
}