:root {
  --ink: #17241c;
  --pine: #1d3b30;
  --lake: #2c6658;
  --gold: #a6844e;
  --paper: #f3eee4;
  --paper-deep: #e7dfd0;
  --line: rgba(23, 36, 28, 0.14);
  --cinnabar: #8d3a30;
  --cream: #f7f3ea;
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --header: 4.5rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(166, 132, 78, 0.08), transparent 28%),
    var(--paper);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.75;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--lake);
}

a:hover {
  color: var(--cinnabar);
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: var(--ink);
  color: var(--cream);
  padding: 0.5rem 0.8rem;
  z-index: 20;
}

.skip:focus {
  top: 0.75rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header);
  padding: 0.75rem 6vw;
  background: rgba(243, 238, 228, 0.92);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(10px);
}

.site-header.is-stuck {
  border-bottom-color: var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border: 1.5px solid var(--cinnabar);
  color: var(--cinnabar);
  font-family: var(--serif);
  font-size: 1.25rem;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
}

.brand-text small {
  color: #5d675f;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.14em;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--cinnabar);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.45rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font: inherit;
  padding: 0.4rem 0.7rem;
}

.nav-toggle-lines,
.nav-toggle-lines::before,
.nav-toggle-lines::after {
  display: block;
  width: 1rem;
  height: 1px;
  background: currentColor;
  position: relative;
}

.nav-toggle-lines::before,
.nav-toggle-lines::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-lines::before {
  top: -5px;
}

.nav-toggle-lines::after {
  top: 5px;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(16rem, 0.7fr);
  gap: 3rem;
  min-height: calc(100vh - var(--header));
  align-items: center;
  padding: 6rem 6vw 9rem;
  color: var(--cream);
  background:
    linear-gradient(160deg, rgba(20, 42, 34, 0.2), transparent 40%),
    linear-gradient(180deg, #16352b 0%, #21493c 58%, #2a5c4c 100%);
  overflow: hidden;
}

.hero-copy,
.hero-panel {
  position: relative;
  z-index: 1;
}

.eyebrow,
.section-index {
  margin: 0 0 0.8rem;
  letter-spacing: 0.22em;
  font-size: 0.82rem;
}

.hero h1,
.about h2,
.work h2,
.scope h2,
.contact h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.25;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4.4rem);
}

.lede {
  max-width: 36rem;
  font-size: 1.12rem;
  color: rgba(247, 243, 234, 0.86);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0.55rem 1.15rem;
  border: 1px solid transparent;
  text-decoration: none;
  font: inherit;
  cursor: pointer;
}

.btn-solid {
  background: var(--gold);
  color: #1b1710;
}

.btn-solid:hover {
  background: #c4a36a;
  color: #1b1710;
}

.btn-line {
  border-color: rgba(247, 243, 234, 0.55);
  color: var(--cream);
}

.btn-line:hover {
  border-color: var(--cream);
  color: var(--cream);
}

.hero-panel {
  padding: 1.5rem;
  background: rgba(247, 243, 234, 0.08);
  border: 1px solid rgba(247, 243, 234, 0.2);
}

.seal {
  width: 5.2rem;
  height: 5.2rem;
  margin-bottom: 1.4rem;
  border: 2px solid #e7b2a8;
  color: #f0c2ba;
  display: grid;
  place-items: center;
  text-align: center;
  font-family: var(--serif);
  line-height: 1.15;
  letter-spacing: 0.12em;
}

.hero-panel dl {
  margin: 0;
}

.hero-panel div + div {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(247, 243, 234, 0.16);
}

.hero-panel dt {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: rgba(247, 243, 234, 0.62);
}

.hero-panel dd {
  margin: 0.15rem 0 0;
  font-family: var(--serif);
  font-size: 1.2rem;
}

.fields {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 28%;
}

.fields path:first-child {
  fill: #1a4336;
}

.fields path:last-child {
  fill: #14362c;
}

.about,
.work,
.scope,
.contact {
  padding: 5.5rem 6vw;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 2rem 4rem;
}

.work-head {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.about h2,
.work h2,
.scope h2,
.contact h2 {
  font-size: clamp(2rem, 3.5vw, 3.1rem);
}

.section-index {
  color: var(--gold);
}

.note {
  color: #5e675f;
  font-size: 0.92rem;
}

.work {
  background: #efe8da;
}


.work-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 3rem;
}

.work-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
}

.work-list li:nth-last-child(-n + 2) {
  border-bottom: 1px solid var(--line);
}

.work-list span {
  font-family: var(--serif);
  color: var(--gold);
  font-size: 1.1rem;
}

.work-list h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 600;
}

.work-list p {
  margin: 0.25rem 0 0;
}

.scope-list {
  margin: 1.5rem 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem 2rem;
  max-width: 62rem;
}

.scope-list li {
  padding-left: 0.9rem;
  border-left: 2px solid var(--gold);
}

.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  background: var(--pine);
  color: var(--cream);
}

.contact .section-index {
  color: #e6d3b0;
}

.contact a {
  color: #f0d7a4;
}

.contact address {
  font-style: normal;
  font-family: var(--serif);
  font-size: 1.35rem;
  line-height: 1.6;
}

.contact .note {
  color: rgba(247, 243, 234, 0.68);
}

.inquiry {
  padding: 1.5rem;
  background: var(--cream);
  color: var(--ink);
}

.inquiry h3 {
  margin: 0 0 0.6rem;
  font-family: var(--serif);
  font-size: 1.6rem;
}

.inquiry label {
  display: block;
  margin-top: 0.9rem;
  font-size: 0.92rem;
}

.inquiry input,
.inquiry textarea {
  display: block;
  width: 100%;
  margin-top: 0.35rem;
  padding: 0.7rem 0.75rem;
  border: 1px solid var(--line);
  background: #fffdf8;
  color: inherit;
  font: inherit;
}

.inquiry input:focus,
.inquiry textarea:focus,
.nav-toggle:focus-visible,
.btn:focus-visible,
.site-nav a:focus-visible,
.brand:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.inquiry .btn {
  margin-top: 1rem;
}

.form-hint {
  min-height: 1.4rem;
  margin: 0;
  color: var(--lake);
}

.form-hint.is-error {
  color: var(--cinnabar);
}

.inquiry.is-saved {
  background: #f4f7f2;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.2rem 6vw 1.6rem;
  background: #10261e;
  color: rgba(247, 243, 234, 0.75);
  font-size: 0.92rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 0.4rem 6vw 1rem;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.75rem 0;
    border-top: 1px solid var(--line);
  }

  .hero,
  .about-grid,
  .work-head,
  .work-list,
  .scope-list,
  .contact,
  .site-footer {
    grid-template-columns: 1fr;
    display: grid;
  }

  .hero {
    min-height: auto;
    padding-top: 3.5rem;
  }

  .work-list li:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .work-list li:last-child {
    border-bottom: 1px solid var(--line);
  }

  .site-footer {
    display: flex;
    flex-direction: column;
  }
}

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