:root {
  color-scheme: light;
  --ink: #172b40;
  --muted: #4b6073;
  --line: #d8e2eb;
  --blue: #16578b;
  --paper: #ffffff;
  --canvas: #f3f6fa;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font: 16px/1.8 system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  overflow-wrap: break-word;
}
a { color: var(--blue); text-underline-offset: .2em; }
a:focus-visible, .table-wrap:focus-visible { outline: 3px solid #4b9bd3; outline-offset: 4px; }
.page-header { background: var(--paper); border-bottom: 1px solid var(--line); }
.sitebar {
  max-width: 1184px;
  margin: 0 auto;
  padding: 20px 32px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px 28px;
}
.site-domain { font-size: 18px; font-weight: 750; text-decoration: none; letter-spacing: -.02em; }
nav { display: flex; align-items: center; gap: 12px 24px; flex-wrap: wrap; flex: 1; }
nav a { font-size: 14px; text-decoration: none; }
nav a[aria-current="page"] { font-weight: 700; text-decoration: underline; }
.phone { font-weight: 700; white-space: nowrap; }
main { max-width: 1184px; margin: 0 auto; padding: 40px 32px 56px; }
h1 { margin: 0 0 28px; font-size: clamp(27px, 3vw, 38px); line-height: 1.4; letter-spacing: -.02em; }
h2 { margin: 0 0 16px; font-size: 23px; line-height: 1.6; }
p { margin: 0 0 16px; }
p:last-child { margin-bottom: 0; }
.content-card { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 30px; }
.units { font-weight: 650; color: var(--muted); }
.table-wrap { max-width: 100%; overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; text-align: left; }
th, td { padding: 17px 18px; border-bottom: 1px solid var(--line); }
thead th { background: #edf4fa; color: #16486e; font-weight: 700; }
tbody th { font-weight: 650; }
tbody td { white-space: nowrap; font-variant-numeric: tabular-nums; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
tbody tr:nth-child(even) { background: #f9fbfd; }
.price-note { margin-top: 20px; color: var(--muted); }
.faq-list { display: grid; gap: 20px; margin-top: 28px; }
.faq-item { border-left: 3px solid #9ebed8; padding: 8px 0 8px 24px; }
.faq-item h2 { font-size: 20px; margin-bottom: 12px; }
.faq-item p { max-width: 78ch; color: var(--muted); }
.case-card { margin-bottom: 28px; scroll-margin-top: 24px; }
.case-card:last-child { margin-bottom: 0; }
.case-card p { max-width: 82ch; line-height: 1.95; }
figure { margin: 28px 0 0; }
.original-image { display: block; max-width: 780px; margin: 0 auto; }
.original-image img { display: block; width: 100%; max-width: 100%; height: auto; object-fit: contain; border: 1px solid var(--line); }
footer { max-width: 1184px; margin: 0 auto; padding: 22px 32px 36px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 12px 28px; }
@media (max-width: 767px) {
  .sitebar { padding: 18px 20px; gap: 12px 20px; }
  nav { order: 3; flex-basis: 100%; gap: 8px 20px; }
  .sitebar > .phone { margin-left: auto; }
  main { padding: 28px 20px 40px; }
  h1 { margin-bottom: 22px; }
  h2 { font-size: 21px; }
  .content-card { padding: 22px; border-radius: 10px; }
  th, td { padding: 13px 10px; font-size: 14px; }
  .faq-item { padding-left: 18px; }
  .faq-item h2 { font-size: 19px; }
  footer { margin: 0 20px; padding: 20px 0 28px; }
}
@media (max-width: 430px) {
  body { font-size: 15px; }
  .sitebar { padding: 16px; gap: 10px 16px; }
  .site-domain { font-size: 16px; }
  .phone { font-size: 14px; }
  nav a { font-size: 13px; }
  main { padding: 24px 16px 36px; }
  .content-card { padding: 18px 14px; }
  h2 { font-size: 19px; }
  th, td { padding: 12px 7px; font-size: 12px; }
  tbody th { min-width: 76px; }
  .faq-item { padding-left: 14px; }
  .faq-item h2 { font-size: 18px; }
  footer { margin: 0 16px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }