:root { color-scheme: light; --ink: #163852; --muted: #526979; --accent: #167d94; --pale: #e9f3f6; --line: #d8e4e9; }
* { box-sizing: border-box; }
body { margin: 0; background: #fff; color: var(--ink); font-family: "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.75; }
a { color: inherit; text-underline-offset: 5px; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 6px; }
.page-header, main, footer { width: min(1080px, calc(100% - 64px)); margin-inline: auto; }
.page-header { display: flex; justify-content: space-between; align-items: center; padding-block: 25px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-size: 19px; font-weight: 600; }
.brand img { object-fit: contain; }
.brand small { font-size: 16px; font-weight: 400; margin-left: 7px; }
.contact-link { font-size: 14px; }
.intro { padding: 70px 0 76px; max-width: 790px; }
.company-name { font-size: 15px; margin: 0 0 24px; color: var(--muted); }
h1 { font-size: clamp(36px, 5.5vw, 60px); font-weight: 600; line-height: 1.32; letter-spacing: -1px; margin: 0 0 28px; }
.intro-text { max-width: 635px; font-size: 18px; color: var(--muted); margin: 0 0 30px; }
.primary-link { display: inline-block; color: #fff; background: var(--accent); padding: 10px 24px; border-radius: 5px; text-decoration: none; font-size: 15px; }
.services { padding: 42px 0 48px; border-top: 1px solid var(--line); }
.section-heading { display: flex; gap: 24px; align-items: baseline; flex-wrap: wrap; margin-bottom: 28px; }
h2 { font-size: 24px; font-weight: 600; margin: 0; }
.section-heading p { margin: 0; color: var(--muted); font-size: 15px; }
.service-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
h3 { margin: 0 0 10px; font-size: 18px; font-weight: 600; }
.service-list p { margin: 0; font-size: 15px; color: var(--muted); }
.contact { background: var(--pale); border-radius: 8px; padding: 28px 32px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.contact p { margin: 5px 0 0; color: var(--muted); font-size: 15px; }
.contact a { color: var(--accent); overflow-wrap: anywhere; }
footer { padding: 32px 0; display: flex; justify-content: space-between; gap: 15px; font-size: 12px; color: var(--muted); }
@media (max-width: 680px) {
  .page-header, main, footer { width: calc(100% - 40px); }
  .brand { font-size: 17px; gap: 8px; }
  .brand small { font-size: 14px; }
  .intro { padding: 45px 0 48px; }
  .intro-text { font-size: 16px; }
  .section-heading { gap: 10px; }
  .service-list { grid-template-columns: 1fr; gap: 26px; }
  .contact { padding: 24px; align-items: flex-start; flex-direction: column; gap: 14px; }
  footer { flex-direction: column; gap: 6px; padding-bottom: 24px; }
}