:root {
  --desk: #e3dcd0;
  --paper: #f7f4ee;
  --paper-2: #efeae1;
  --ink: #1c1915;
  --ink-soft: #5c564c;
  --line: #ddd4c6;
  --cinnabar: #9d3424;
  --cinnabar-deep: #7d281c;
  --shadow: 0 22px 50px rgba(48, 36, 22, 0.08);
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --serif: "Songti SC", "STSong", "PMingLiU", "SimSun", serif;
  --header: 4.25rem;
  --pad: clamp(1.25rem, 4vw, 4.5rem);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--desk);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.75;
}

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

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

h1,
h2,
h3,
p,
dl,
dd,
ul,
ol {
  margin: 0;
}

p,
li,
dd {
  text-wrap: pretty;
}

ul,
ol {
  padding: 0;
}

h1,
h2,
.brand-name,
.service-list li::before {
  font-family: var(--serif);
  font-weight: 600;
}

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 20;
  padding: 0.6rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}

.skip:focus {
  top: 1rem;
}

.sheet {
  width: min(1120px, calc(100% - 2rem));
  margin: 1rem auto 1.5rem;
  background: var(--paper);
  border: 1px solid #d5cbbd;
  border-left: 10px solid var(--cinnabar);
  box-shadow: var(--shadow);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header);
  padding: 0.75rem var(--pad);
  background: rgba(247, 244, 238, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  color: var(--cinnabar);
}

.brand-name {
  font-size: 1.35rem;
  letter-spacing: 0.08em;
}

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

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

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

.nav-toggle {
  display: none;
  align-items: center;
  min-height: 2.5rem;
  padding: 0 0.85rem;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.hero,
.section,
.site-footer {
  padding: clamp(3rem, 6vw, 5.25rem) var(--pad);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.8fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: end;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin-bottom: 1rem;
  color: var(--cinnabar);
  font-size: 0.84rem;
  letter-spacing: 0.16em;
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.55rem;
  background: var(--cinnabar);
  transform: translateY(-0.08em);
}

h1 {
  font-size: clamp(2rem, 4.6vw, 3.7rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
}

.lead {
  max-width: 38em;
  margin-top: 1.35rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0.55rem 1.15rem;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  cursor: pointer;
}

.button:hover {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.button.secondary {
  background: transparent;
  color: var(--ink);
}

.button.secondary:hover {
  background: var(--cinnabar);
  color: var(--paper);
}

.card {
  padding: 1.35rem 1.35rem 1.2rem;
  background: var(--paper-2);
  border: 1px solid var(--line);
}

.card-kicker {
  color: var(--cinnabar);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
}

.card-name {
  margin: 0.7rem 0 1rem;
  font-size: 1.05rem;
  line-height: 1.55;
}

.facts {
  display: grid;
  gap: 0.9rem;
}

.facts div {
  display: grid;
  gap: 0.15rem;
}

.facts dt {
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.facts a {
  color: var(--cinnabar-deep);
}

.nowrap {
  white-space: nowrap;
}

.section {
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header) + 0.5rem);
}

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

h2 {
  max-width: 11em;
  font-size: clamp(1.8rem, 3vw, 2.45rem);
  line-height: 1.3;
  text-wrap: balance;
}

.section-intro {
  margin-top: 0.9rem;
  color: var(--ink-soft);
}

.product-meta {
  margin-top: 0.75rem;
  color: var(--cinnabar);
  font-size: 0.92rem;
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.product-grid article {
  padding: 1.25rem 1.3rem 1.35rem;
  background: var(--paper-2);
  border: 1px solid var(--line);
}

.product-grid h3 {
  margin-bottom: 0.35rem;
  font-size: 1.15rem;
}

.product-grid p {
  color: var(--ink-soft);
}

.product-grid + .note {
  margin-top: 1.25rem;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(240px, 0.7fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
}

.prose {
  display: grid;
  gap: 1rem;
  color: var(--ink-soft);
}

.aside-panel {
  align-self: start;
  padding: 1.25rem 1.3rem;
  background: var(--ink);
  color: var(--paper);
}

.aside-panel dt {
  color: rgba(247, 244, 238, 0.68);
  font-size: 0.82rem;
}

.aside-panel dd + dt {
  margin-top: 0.9rem;
}

.aside-panel a {
  color: var(--paper);
}

.service-list {
  list-style: none;
  counter-reset: service;
}

.service-list li {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  gap: 0.2rem 1rem;
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
  counter-increment: service;
}

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

.service-list li::before {
  grid-row: 1 / span 2;
  color: var(--cinnabar);
  font-size: 1.35rem;
  line-height: 1.35;
  content: counter(service, decimal-leading-zero);
}

.service-list h3,
.service-list p {
  grid-column: 2;
}

.service-list h3 {
  font-family: var(--sans);
  font-size: 1.15rem;
  font-weight: 700;
}

.service-list p {
  color: var(--ink-soft);
}

.note a {
  color: var(--cinnabar-deep);
}

.policy {
  display: grid;
  gap: 1.6rem;
  max-width: 42rem;
}

.policy h2 {
  max-width: none;
  margin-bottom: 0.45rem;
  font-family: var(--sans);
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
}

.policy p,
.policy li {
  color: var(--ink-soft);
}

.policy a {
  color: var(--cinnabar-deep);
}

.policy ul,
.policy ol {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.45rem;
  padding-left: 1.2rem;
}

.policy-meta {
  margin-top: 0.8rem;
  color: var(--ink-soft);
}

.note {
  margin-top: 1.75rem;
  padding: 1.1rem 1.2rem;
  background: #f8efe8;
  border-left: 3px solid var(--cinnabar);
}

.note h3 {
  margin-bottom: 0.35rem;
  font-size: 1rem;
}

.note p + p {
  margin-top: 0.2rem;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem 2rem;
  align-items: end;
}

.address {
  margin-top: 1rem;
  font-style: normal;
}

.address p + p {
  margin-top: 0.35rem;
}

.address a {
  color: var(--cinnabar-deep);
  font-size: 1.2rem;
  text-underline-offset: 0.18em;
}

.site-footer {
  display: grid;
  gap: 0.8rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.4rem;
}

.footer-links a {
  color: var(--ink);
  text-decoration: none;
}

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

.colophon {
  padding-top: 0.4rem;
  border-top: 1px solid var(--line);
}

:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
}

::selection {
  background: #efd0c6;
}

@media (max-width: 800px) {
  .sheet {
    width: 100%;
    margin: 0;
    border-right: 0;
    border-bottom: 0;
    box-shadow: none;
  }

  body {
    background: var(--paper);
  }

  .nav-toggle {
    display: inline-flex;
  }

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

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

  .site-nav a {
    width: 100%;
    padding: 0.7rem 0;
    border-top: 1px solid var(--line);
  }

  .hero,
  .about-grid,
  .product-grid,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .contact-layout .actions {
    margin-top: 0;
  }
}

@media (max-width: 420px) {
  .service-list li {
    grid-template-columns: 2.7rem minmax(0, 1fr);
  }
}

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

@media print {
  body {
    background: white;
  }

  .sheet {
    width: auto;
    margin: 0;
    border: 0;
    box-shadow: none;
  }

  .site-header {
    position: static;
  }

  .nav-toggle,
  .skip,
  .actions {
    display: none;
  }

  .site-nav {
    display: none;
  }
}