:root {
  --green: #164f49;
  --green-deep: #27665e;
  --charcoal: #183f3b;
  --ivory: #f7f4ec;
  --gold: #b85d51;
  --text: #26312e;
  --muted: #66716d;
  --line: rgba(13, 73, 67, .16);
  --white: #fff;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: var(--ivory); font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; line-height: 1.75; }
a { color: inherit; }
img { display: block; max-width: 100%; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; padding: .75rem 1rem; background: var(--gold); color: var(--charcoal); }
.skip-link:focus { top: 1rem; }

.site-header { position: sticky; top: 0; z-index: 20; min-height: 74px; padding: 0 max(24px, calc((100vw - var(--max)) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 2rem; background: rgba(247,244,236,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
.brand { display: flex; align-items: center; gap: .65rem; text-decoration: none; color: var(--green); }
.brand-logo { width: 48px; height: 48px; object-fit: contain; }
.brand-wordmark { display: flex; align-items: baseline; gap: .65rem; }
.brand strong { font-size: 1.45rem; letter-spacing: .08em; }
.brand span { font-weight: 700; }
#site-nav { display: flex; align-items: center; gap: 1.8rem; }
#site-nav a { text-decoration: none; font-size: .94rem; }
#site-nav a:hover, #site-nav a:focus-visible { color: var(--gold); }
.nav-cta { padding: .68rem 1.1rem; border: 1px solid rgba(13,73,67,.24); }
.menu-button { display: none; padding: .6rem .9rem; border: 1px solid var(--line); background: transparent; color: var(--green); }

.hero { position: relative; height: calc(100svh - 74px); min-height: 660px; display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(420px, .92fr); grid-template-rows: 1fr 128px; align-items: center; column-gap: clamp(2.5rem, 4vw, 4rem); padding: 48px max(24px, calc((100vw - var(--max)) / 2)) 0; color: var(--green); background: var(--ivory); overflow: hidden; }
.hero::before { content: ""; position: absolute; top: 0; right: 0; width: 42%; height: calc(100% - 128px); background: linear-gradient(rgba(22,79,73,.1), rgba(22,79,73,.1)), url("assets/image1.webp") center/cover no-repeat; opacity: .18; filter: saturate(.45) contrast(.88); clip-path: polygon(17% 0, 100% 0, 100% 100%, 0 100%); }
.hero::after { content: ""; position: absolute; inset: 0 0 128px; background: linear-gradient(90deg, var(--ivory) 0%, rgba(247,244,236,.98) 49%, rgba(247,244,236,.28) 100%); }
.hero-shade { display: none; }
.hero-content, .hero-note { position: relative; z-index: 1; }
.company { margin: 0 0 2.7rem; color: rgba(22,79,73,.68); font-size: .84rem; font-weight: 700; letter-spacing: .08em; }
.eyebrow { margin: 0 0 1.2rem; font-size: .78rem; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }
.eyebrow.green { color: var(--green); }
.eyebrow.gold, .note-gold { color: var(--gold); }
.hero h1 { max-width: 650px; margin: 0; color: #123f3a; font-size: clamp(3.65rem, 5.25vw, 5.65rem); font-weight: 700; line-height: 1.1; letter-spacing: -.012em; }
.hero-slogan { position: relative; margin: 1.35rem 0 1.8rem; padding-left: 2.8rem; color: var(--gold); font-size: clamp(1.25rem, 1.8vw, 1.65rem); font-weight: 700; letter-spacing: .03em; }
.hero-slogan::before { content: ""; position: absolute; left: 0; top: 50%; width: 2rem; height: 2px; background: var(--gold); }
.hero-actions { display: flex; gap: .9rem; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 1.25rem; text-decoration: none; font-weight: 700; }
.button-gold { background: var(--green); color: var(--white); }
.button-ghost { border: 1px solid rgba(22,79,73,.42); color: var(--green); }
.hero-note { align-self: center; max-width: 520px; justify-self: end; padding: 2.1rem 2.25rem; border-top: 3px solid var(--gold); background: rgba(247,244,236,.8); backdrop-filter: blur(7px); }
.hero-note h2 { margin: 0 0 1.35rem; font-size: clamp(1.75rem, 2.25vw, 2.25rem); line-height: 1.28; }
.hero-note p { margin: .5rem 0; color: #4f625e; line-height: 1.7; }
.hero-note .note-gold { color: var(--gold); font-weight: 700; }
.hero-product-index { position: relative; z-index: 2; grid-column: 1 / -1; display: grid; grid-template-columns: repeat(4, 1fr); min-height: 128px; margin: 0 calc(-1 * max(24px, calc((100vw - var(--max)) / 2))); padding: 0 max(24px, calc((100vw - var(--max)) / 2)); background: var(--green); }
.hero-product-index a { display: flex; flex-direction: column; justify-content: center; gap: .45rem; padding: 1.8rem 1.5rem; color: var(--white); text-decoration: none; border-right: 1px solid rgba(255,255,255,.18); transition: background-color .2s ease; }
.hero-product-index a:first-child { border-left: 1px solid rgba(255,255,255,.18); }
.hero-product-index a:hover, .hero-product-index a:focus-visible { background: rgba(255,255,255,.08); }
.hero-product-index span { color: #ddb0a9; font-size: .72rem; font-weight: 800; letter-spacing: .14em; }
.hero-product-index strong { font-size: clamp(1rem, 1.5vw, 1.3rem); letter-spacing: .02em; }

.section { padding: 110px max(24px, calc((100vw - var(--max)) / 2)); }
.section h2 { margin: 0; color: var(--green); font-size: clamp(2.2rem, 4vw, 4rem); line-height: 1.2; letter-spacing: -.035em; }
.section-intro { display: grid; grid-template-columns: 1.4fr .6fr; gap: 4rem; align-items: end; margin-bottom: 4.5rem; }
.section-intro > p { max-width: 420px; margin: 0 0 .5rem; color: var(--muted); font-size: 1.05rem; }

.issues { background: var(--ivory); }
.issue-list { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.issue-list article { min-height: 300px; padding: 2rem 1.65rem 2.3rem; border-right: 1px solid var(--line); }
.issue-list article:last-child { border-right: 0; }
.issue-list span, .system-list > article > span, .process-list > li > span { color: var(--gold); font-size: .8rem; font-weight: 800; letter-spacing: .14em; }
.issue-list h3 { margin: 3.5rem 0 1.5rem; color: var(--green); font-size: 1.3rem; }
.issue-list p { margin: .55rem 0; color: var(--muted); }
.source-note { margin: 1.2rem 0 0; color: #78817e; font-size: .75rem; }

.systems { color: var(--text); background: var(--white); }
.systems-heading { display: block; margin-bottom: 5rem; }
.systems-heading h2 { max-width: 900px; color: var(--green); }
.systems-heading > p:last-child { max-width: 620px; margin: 1.6rem 0 0; padding-left: 1.25rem; color: var(--muted); border-left: 2px solid var(--gold); }
.system-list { border-top: 1px solid var(--line); }
.system-list article { display: grid; grid-template-columns: 90px 1fr auto; gap: 2rem; align-items: center; min-height: 175px; padding: 2rem 0; border-bottom: 1px solid var(--line); }
.system-list h3 { margin: 0 0 .65rem; font-size: clamp(1.65rem, 3vw, 2.8rem); }
.system-list p { display: inline; margin: 0 1.5rem 0 0; color: var(--muted); }
.system-list a { text-decoration: none; color: var(--gold); white-space: nowrap; }

.about { display: grid; grid-template-columns: .8fr 1.2fr; gap: 6rem; align-items: center; background: var(--white); }
.about h3 { margin: 2.5rem 0 1rem; color: var(--gold); font-size: 1.5rem; }
.about-copy > p:not(.eyebrow):not(.source-note) { color: var(--muted); }
.about-company { font-weight: 700; color: var(--green) !important; }
.photo-collage { display: grid; grid-template-columns: 1fr .45fr; grid-template-rows: 1fr auto; gap: 1rem; align-items: end; }
.photo-main { grid-column: 1 / -1; width: 100%; aspect-ratio: 2.2 / 1; object-fit: cover; }
.photo-detail { grid-column: 2; width: 100%; margin-top: -22%; aspect-ratio: 1 / 1; object-fit: cover; border: 12px solid var(--white); }

.service-choice { background: var(--ivory); }
.service-table { border-top: 1px solid var(--line); }
.table-row { display: grid; grid-template-columns: 1fr .8fr 1.25fr; min-height: 110px; border-bottom: 1px solid var(--line); }
.table-row > * { padding: 1.25rem 1.1rem; border-right: 1px solid var(--line); }
.table-row > *:last-child { border-right: 0; }
.table-row strong { color: var(--green); }
.table-row span { color: var(--muted); }
.table-head { min-height: auto; color: var(--white); background: var(--green); font-size: .82rem; font-weight: 700; }
.table-row.table-head > * { color: var(--white); }

.experience { color: var(--text); background: #f1f3f0; }
.experience-heading { max-width: 850px; margin-bottom: 4rem; }
.experience h2 { color: var(--green); }
.experience-heading > p:last-child { color: var(--muted); }
.experience-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.experience-grid article { padding: 2.4rem 3rem 2.4rem 0; border-right: 1px solid var(--line); }
.experience-grid article + article { padding-left: 3rem; border-right: 0; }
.experience-grid p { color: var(--muted); }
.experience-grid .case-type { color: var(--gold); font-weight: 700; }
.experience-grid h3 { margin-top: 2rem; font-size: 1.1rem; }
.source-note.light { color: #74817d; }

.process { background: var(--white); }
.process-list { display: grid; grid-template-columns: repeat(3, 1fr); margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.process-list li { min-height: 260px; padding: 2rem; border-right: 1px solid var(--line); }
.process-list li:last-child { border-right: 0; }
.process-list h3 { margin: 3rem 0 1rem; color: var(--green); font-size: 1.35rem; }
.process-list p { color: var(--muted); }

.contact { display: grid; grid-template-columns: 1.5fr .5fr; gap: 5rem; padding: 95px max(24px, calc((100vw - var(--max)) / 2)); color: var(--white); background: var(--green); }
.contact h2 { margin: 0; font-size: clamp(2.3rem, 4.5vw, 4.6rem); line-height: 1.15; }
.contact > div > p:last-child { color: rgba(255,255,255,.66); }
.contact-details { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; }
.contact-person { display: flex; flex-direction: column; align-items: flex-start; }
.contact-person + .contact-person { margin-top: 1.25rem; }
.contact-details p { margin: 0 0 .25rem; color: #e4a096; font-weight: 700; }
.contact-details a { text-decoration: none; color: var(--white); }
.contact-details a + a { margin-top: .05rem; color: rgba(255,255,255,.76); font-size: .84rem; }
.qr-follow { display: flex; flex-direction: column; align-items: center; margin-top: 1.5rem; }
.contact-details .qr-follow img { margin: 0 0 .65rem; border: 6px solid var(--white); }
.contact-details .qr-follow span { max-width: 210px; color: rgba(255,255,255,.78); font-size: .78rem; line-height: 1.65; text-align: center; letter-spacing: .04em; }

.site-footer { display: grid; grid-template-columns: 1fr auto auto; gap: 3rem; align-items: start; padding: 48px max(24px, calc((100vw - var(--max)) / 2)); background: var(--ivory); color: var(--green); font-size: .82rem; }
.site-footer p { margin: .35rem 0 0; color: var(--muted); }
.site-footer nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.site-footer a { text-decoration: none; }

@media (max-width: 900px) {
  .menu-button { display: block; }
  #site-nav { position: absolute; top: 74px; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 1rem 24px 1.4rem; background: var(--ivory); border-bottom: 1px solid var(--line); }
  #site-nav.open { display: flex; }
  #site-nav a { padding: .75rem 0; }
  .nav-cta { border: 0; }
  .hero { height: auto; min-height: auto; grid-template-columns: 1fr; grid-template-rows: auto; align-items: start; padding-top: 95px; }
  .company { margin-bottom: 4rem; }
  .hero-note { width: 100%; max-width: none; justify-self: stretch; margin-top: 2rem; }
  .hero-content { order: 1; }
  .hero-note { order: 2; }
  .hero-product-index { order: 3; grid-column: 1; grid-template-columns: 1fr 1fr; margin-top: 2rem; }
  .hero-product-index a:nth-child(2) { border-right: 0; }
  .hero-product-index a:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.18); }
  .section { padding-top: 78px; padding-bottom: 78px; }
  .section-intro, .systems-heading, .about, .contact { grid-template-columns: 1fr; gap: 2.5rem; }
  .section-intro { margin-bottom: 3rem; }
  .issue-list { grid-template-columns: 1fr 1fr; }
  .issue-list article:nth-child(2) { border-right: 0; }
  .issue-list article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .systems-heading > p:last-child { grid-column: 1; }
  .system-list article { grid-template-columns: 55px 1fr; }
  .system-list a { grid-column: 2; }
  .photo-collage { margin-top: 1rem; }
  .site-footer { grid-template-columns: 1fr; gap: 1.5rem; }
}

@media (max-width: 620px) {
  .site-header { min-height: 66px; }
  .brand-logo { width: 40px; height: 40px; }
  .brand-wordmark { gap: .45rem; }
  .brand strong { font-size: 1.15rem; }
  .brand span { font-size: .82rem; }
  #site-nav { top: 66px; }
  .hero { padding-top: 82px; padding-bottom: 60px; }
  .hero h1 { font-size: clamp(2.65rem, 13vw, 3.4rem); line-height: 1.08; }
  .hero-note { padding-left: 1.2rem; }
  .hero::before { width: 100%; height: 48%; opacity: .1; clip-path: none; }
  .hero::after { inset: 0; background: linear-gradient(180deg, rgba(247,244,236,.7), var(--ivory) 47%); }
  .hero-product-index { grid-template-columns: 1fr 1fr; min-height: 0; }
  .hero-product-index a { min-height: 86px; padding: 1.1rem 1.3rem; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
  .hero-product-index a:nth-child(odd) { border-right: 1px solid rgba(255,255,255,.18); }
  .hero-product-index a:nth-child(n+3) { border-bottom: 0; }
  .issue-list, .experience-grid, .process-list { grid-template-columns: 1fr; }
  .issue-list article, .process-list li { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .issue-list article:last-child, .process-list li:last-child { border-bottom: 0; }
  .issue-list h3, .process-list h3 { margin-top: 1.5rem; }
  .system-list article { grid-template-columns: 42px 1fr; gap: 1rem; }
  .system-list p { display: block; }
  .table-head { display: none; }
  .table-row { grid-template-columns: 1fr; padding: 1.2rem 0; }
  .table-row > * { padding: .35rem 0; border-right: 0; }
  .experience-grid article, .experience-grid article + article { padding: 2rem 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
  .experience-grid article:last-child { border-bottom: 0; }
  .contact { padding-top: 70px; padding-bottom: 70px; }
  .site-footer nav { flex-direction: column; gap: .55rem; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }