:root {
  --ink: #101b26;
  --paper: #f4f6f4;
  --green: #138064;
  --line: #ccd6d1;
  --muted: #64706d;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; color: var(--ink); background: var(--paper); font-family: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif; line-height: 1.62; }
img { max-width: 100%; }
a { color: inherit; }

.side { position: fixed; inset: 0 auto 0 0; z-index: 10; width: 224px; padding: 30px 25px; display: flex; flex-direction: column; justify-content: space-between; color: #eef3f0; background: var(--ink); }
.brand { font-size: 26px; font-weight: 800; letter-spacing: -.06em; }
.brand small { display: block; margin-top: 4px; font-size: 9px; font-weight: 500; letter-spacing: .08em; opacity: .72; }
nav a { display: block; padding: 8px 0; border-top: 1px solid rgba(255,255,255,.17); text-decoration: none; font-size: 12px; letter-spacing: .03em; }
nav a:last-child { border-bottom: 1px solid rgba(255,255,255,.17); }
.side-foot { font-size: 11px; color: #aabbb4; }

.main { margin-left: 224px; }
.main > header { padding: 20px 5.5vw; border-bottom: 1px solid var(--line); font-size: 12px; letter-spacing: .08em; }
.hero { min-height: 630px; padding: 56px 5.5vw; display: grid; grid-template-columns: minmax(0,1.02fr) minmax(280px,.98fr); gap: 5vw; align-items: center; }
.kicker, .section-no, .semir-label { color: var(--green); font-size: 12px; font-weight: 700; letter-spacing: .09em; }
h1, h2, p { margin-top: 0; }
h1 { margin: 14px 0 28px; font-size: clamp(46px, 6.7vw, 92px); line-height: .98; letter-spacing: -.09em; font-weight: 800; }
h1 b { color: var(--green); font-weight: inherit; }
.lead { max-width: 420px; font-size: 17px; color: #34413e; }
.button { display: inline-block; margin-top: 12px; padding: 12px 22px; border: 1px solid var(--ink); text-decoration: none; background: var(--ink); color: white; font-size: 13px; transition: .2s ease; }
.button:hover { background: var(--green); border-color: var(--green); }
.hero-photo, .section-photo { margin: 0; }
.hero-photo { min-height: 500px; position: relative; overflow: hidden; background: var(--ink); }
.hero-photo img { width: 100%; height: 100%; min-height: 500px; object-fit: cover; display: block; }
.hero-photo figcaption { position: absolute; right: 16px; bottom: 12px; color: white; font-size: 10px; letter-spacing: .12em; text-shadow: 0 1px 6px rgba(0,0,0,.55); }

.statement { padding: 80px 5.5vw; display: grid; grid-template-columns: minmax(0,1.15fr) minmax(260px,.85fr); gap: 44px; align-items: end; color: white; background: var(--ink); }
.statement p { max-width: 970px; margin: 0; font-size: clamp(20px, 2vw, 30px); line-height: 1.18; letter-spacing: -.05em; font-weight: 700; }
.statement h2 { max-width: 970px; margin: 14px 0 30px; font-size: clamp(31px, 4.2vw, 63px); color: white; }
.statement-copy > div { display: flex; flex-wrap: wrap; gap: 9px; }
.statement-copy > div span { padding: 6px 11px; border: 1px solid rgba(255,255,255,.3); color: #b5cdc5; font-size: 12px; }
.statement-photo { margin: 0; overflow: hidden; background: #e8eeeb; }
.statement-photo img { display: block; width: 100%; height: auto; }
.statement b { color: #73d4b6; }
.section { padding: 84px 5.5vw; display: grid; grid-template-columns: 110px minmax(0,1fr); gap: 28px; border-bottom: 1px solid var(--line); }
.section-content { max-width: 1050px; }
h2 { margin-bottom: 14px; font-size: clamp(28px, 3.4vw, 49px); line-height: 1.16; letter-spacing: -.07em; }
.copy { max-width: 700px; color: #4f5c59; font-size: 16px; }
.section-photo { margin-top: 32px; max-width: 800px; overflow: hidden; border: 1px solid var(--line); background: #e7ece9; }
.section-photo img { width: 100%; height: auto; display: block; }
.section-photo.knowledge img { object-position: center; }

.cards { margin-top: 34px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.cards article { min-height: 180px; padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.34); }
.cards article > span { color: var(--green); font-weight: 800; font-size: 12px; }
.cards h3 { margin: 10px 0 9px; font-size: 19px; }
.cards p { margin: 0; color: var(--muted); font-size: 14px; }
.service-gallery { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-top: 26px; }
.service-gallery figure { margin: 0; overflow: hidden; border: 1px solid var(--line); background: #e7ece9; }
.service-gallery img { display: block; width: 100%; height: auto; }
.method ol { padding: 0; margin: 32px 0 0; list-style: none; border-top: 1px solid var(--line); }
.method li { padding: 18px 0; display: grid; grid-template-columns: 72px minmax(0,1fr); gap: 15px; border-bottom: 1px solid var(--line); }
.method li > span { color: var(--green); font-weight: 800; }
.method h3 { margin: 0 0 3px; font-size: 16px; }
.method li p { margin: 0; color: var(--muted); }
.notice { margin-top: 28px; padding: 18px 20px; border-left: 3px solid var(--green); background: #e9f1ed; color: #42504c; font-size: 14px; }
.offer { background: #f9faf9; }
.offer-grid { margin-top: 30px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.offer-grid article { min-height: 190px; padding: 25px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.offer-grid span { color: var(--green); font-size: 12px; font-weight: 800; }
.offer-grid h3 { margin: 12px 0 9px; font-size: 21px; }
.offer-grid p { margin: 0; color: var(--muted); font-size: 14px; }

.semir { padding: 84px 5.5vw; background: #e7ece9; border-bottom: 1px solid var(--line); }
.semir-body { max-width: 1050px; margin-left: 138px; }
.semir h2 { margin-top: 10px; }
.semir-grid { display: grid; grid-template-columns: minmax(0,1.1fr) minmax(360px,.9fr); gap: 38px; align-items: start; }
.semir-grid > div > p { color: #3e4c48; }
.semir-photos { display: grid; grid-template-columns: 1fr; gap: 16px; }
.semir-photo { margin: 0; overflow: hidden; border: 1px solid var(--line); background: #d7dfdc; }
.semir-photo img { display: block; width: 100%; height: auto; }
.semir-intro { max-width: 760px; font-size: 17px; color: #3e4c48; }
.semir-stats { margin-top: 33px; display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; background: var(--line); }
.semir-stats article { padding: 22px; background: var(--paper); }
.semir-stats b { display: block; font-size: 34px; letter-spacing: -.06em; line-height: 1.1; }
.semir-stats span { display: block; margin-top: 8px; font-size: 13px; color: var(--muted); }
.semir-note { margin: 24px 0 0; padding: 16px 18px; border-left: 3px solid var(--green); background: rgba(255,255,255,.48); color: #53605c; font-size: 13px; }
.sources { margin: 14px 0 0; font-size: 12px; color: var(--muted); }
.sources a { color: var(--green); }

.contact { padding: 84px 5.5vw; background: var(--green); color: white; display: grid; grid-template-columns: 110px minmax(0,1fr); gap: 28px; }
.contact .section-no { color: #c7f4e7; }
.contact h2 { max-width: 680px; }
.contact p { max-width: 620px; }
.contact-link { display: inline-block; margin-top: 12px; padding: 13px 22px; border: 1px solid #ffb21a; border-radius: 2px; background: #ffb21a; color: #102019; text-decoration: none; font-size: 14px; font-weight: 800; box-shadow: 0 8px 20px rgba(0,0,0,.22); transition: transform .2s ease, background .2s ease; }
.contact-link:hover { transform: translateY(-2px); background: #ffd36e; }
.contact-card { margin-top: 30px; max-width: 560px; padding: 24px; border: 1px solid rgba(255,255,255,.48); display: grid; gap: 8px; background: rgba(0,0,0,.08); }
.contact-card a { color: white; }
footer { padding: 18px 5.5vw; background: var(--ink); color: #aabbb4; font-size: 11px; }

@media (max-width: 850px) {
  .side { position: static; width: auto; min-height: auto; padding: 20px; gap: 22px; }
  .side nav { display: flex; flex-wrap: wrap; gap: 0 16px; }
  .side nav a { border: 0; padding: 2px 0; }
  .side nav a:last-child { border: 0; }
  .main { margin-left: 0; }
  .main > header, .hero, .section, .semir, .contact { padding-left: 24px; padding-right: 24px; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding-top: 52px; padding-bottom: 52px; }
  .hero-photo, .hero-photo img { min-height: 340px; }
  .section, .contact, .statement { grid-template-columns: 1fr; gap: 24px; padding-top: 58px; padding-bottom: 58px; }
  .semir { padding-top: 58px; padding-bottom: 58px; }
  .semir-body { margin-left: 0; }
  .cards, .offer-grid, .semir-stats, .service-gallery, .semir-grid { grid-template-columns: 1fr; }
  .semir-photos { grid-template-columns: 1fr; }
  .method li { grid-template-columns: 56px 1fr; }
}