:root {
  color-scheme: light;
  --ink: #222a2a;
  --muted: #586363;
  --line: #dce0dc;
  --paper: #ffffff;
  --soft: #f3f6f3;
  --green: #255e52;
  --gold: #b48b46;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif; line-height: 1.75; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid var(--green); outline-offset: 5px; }
.wrap { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.site-header { border-bottom: 1px solid var(--line); background: var(--paper); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark { width: 37px; height: 37px; display: grid; place-items: center; background: var(--green); color: #fff; font: 700 13px/1 Arial, sans-serif; }
.brand-name { font-size: 15px; font-weight: 700; white-space: nowrap; }
nav { display: flex; align-items: center; gap: 30px; font-size: 13px; color: var(--muted); }
nav a:hover, .text-link:hover, .case-contact a:hover { color: var(--green); }
.introduction { padding: 84px 0 0; }
.eyebrow { margin: 0; color: var(--green); font: 700 11px/1.5 Arial, "Microsoft YaHei", sans-serif; text-transform: uppercase; }
h1, h2, h3, p { letter-spacing: 0; }
h1 { font-size: 68px; font-weight: 650; line-height: 1.25; margin: 25px 0 24px; }
.intro-copy { max-width: 690px; font-size: 18px; line-height: 1.95; color: var(--muted); margin: 0 0 26px; }
.text-link { display: inline-flex; gap: 12px; align-items: center; color: var(--green); font-size: 14px; font-weight: 700; border-bottom: 1px solid var(--green); padding-bottom: 5px; }
.intro-line { display: flex; gap: 32px; border-top: 1px solid var(--line); margin-top: 76px; padding: 20px 0 22px; color: var(--muted); font-size: 12px; }
.intro-line span + span:before { content: "/"; color: var(--gold); margin-right: 32px; }
.section-band { background: var(--soft); }
.services { padding: 76px 0 84px; }
.section-heading { max-width: 700px; margin-bottom: 48px; }
h2 { font-size: 31px; line-height: 1.4; font-weight: 650; margin: 12px 0 0; }
.service-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
.service-list article { border-top: 2px solid var(--green); padding-top: 19px; }
.index { color: var(--gold); font-size: 12px; font-weight: 700; }
h3 { font-size: 20px; line-height: 1.4; margin: 17px 0 9px; }
.service-list p { font-size: 14px; color: var(--muted); line-height: 1.9; margin: 0; max-width: 280px; }
.product { padding: 90px 0; }
.product-layout { display: grid; grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr); align-items: center; gap: 70px; }
.product-copy p:not(.eyebrow) { font-size: 15px; color: var(--muted); line-height: 2; margin: 22px 0 28px; }
.product-copy dl { margin: 0; border-top: 1px solid var(--line); }
.product-copy dl div { display: grid; grid-template-columns: 80px 1fr; gap: 15px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.product-copy dt { font-weight: 700; }
.product-copy dd { color: var(--muted); margin: 0; }
.product-visual { margin: 0; min-width: 0; }
.product-visual img { width: 100%; height: auto; display: block; aspect-ratio: 7 / 6; object-fit: cover; border: 1px solid var(--line); background: #f9f8f2; }
.product-visual figcaption { font-size: 12px; color: var(--muted); margin-top: 11px; }
.message { padding: 69px 0; }
.message-layout { display: grid; grid-template-columns: 1fr 1.35fr; gap: 80px; align-items: start; }
.message-layout p:not(.eyebrow) { margin: 0; font-size: 15px; color: var(--muted); line-height: 2; }
.contact { padding: 76px 0 88px; }
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-layout p { font-size: 14px; color: var(--muted); margin: 12px 0 0; }
.case-contact { border-left: 1px solid var(--line); padding-left: 55px; display: flex; flex-direction: column; align-items: flex-start; }
.case-contact span { font-size: 12px; color: var(--muted); }
.case-contact strong { font-size: 18px; margin-top: 13px; }
.case-contact a { color: var(--green); border-bottom: 1px solid var(--green); font-weight: 700; margin-top: 16px; }
.site-footer { border-top: 1px solid var(--line); color: var(--muted); }
.footer-inner { min-height: 70px; display: flex; justify-content: space-between; align-items: center; gap: 20px; font-size: 12px; }
@media (max-width: 760px) {
  .header-inner { min-height: 70px; }
  .brand-name { font-size: 13px; }
  nav { gap: 13px; font-size: 12px; }
  .introduction { padding-top: 55px; }
  h1 { font-size: 40px; }
  .intro-copy { font-size: 16px; }
  .intro-line { margin-top: 53px; gap: 12px; flex-wrap: wrap; }
  .intro-line span + span:before { margin-right: 12px; }
  .services, .product, .contact { padding: 62px 0; }
  .section-heading { margin-bottom: 33px; }
  .service-list { grid-template-columns: 1fr; gap: 27px; }
  .service-list p { max-width: none; }
  .product-layout, .message-layout, .contact-layout { grid-template-columns: 1fr; gap: 34px; }
  .message { padding: 57px 0; }
  .case-contact { border-left: 0; border-top: 1px solid var(--line); padding: 26px 0 0; }
}
@media (max-width: 480px) {
  .wrap { width: calc(100% - 36px); }
  .header-inner { align-items: flex-start; flex-direction: column; justify-content: center; padding: 13px 0; gap: 10px; }
  nav { width: 100%; justify-content: space-between; }
  .brand-name { white-space: normal; }
  .introduction { padding-top: 46px; }
  h1 { font-size: 35px; margin: 18px 0 20px; }
  .eyebrow { font-size: 10px; }
  h2 { font-size: 26px; }
  .intro-copy { font-size: 15px; }
  .intro-line { font-size: 11px; }
  .product-copy dl div { grid-template-columns: 67px 1fr; }
  .footer-inner { align-items: flex-start; flex-direction: column; justify-content: center; padding: 17px 0; gap: 3px; }
}
}