:root {
  --paper: #f5f1e8;
  --paper-strong: #fffaf0;
  --ink: #20201c;
  --muted: #6d6a60;
  --line: rgba(32, 32, 28, 0.14);
  --forest: #31463b;
  --copper: #a65f32;
  --shadow: 0 22px 50px rgba(32, 32, 28, 0.12);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "Noto Sans", sans-serif;
  line-height: 1.5;
  letter-spacing: 0;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 48px);
  color: #fffaf0;
  transition: background 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled {
  color: var(--ink);
  background: rgba(245, 241, 232, 0.94);
  box-shadow: 0 1px 0 var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
}

.brand span {
  font-size: 14px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 13px;
  font-weight: 650;
  text-transform: uppercase;
}

.site-nav a {
  position: relative;
}

.site-nav a::after {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
  content: "";
}

.site-nav a:hover::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: end;
  overflow: hidden;
  color: #fffaf0;
  isolation: isolate;
}

.hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, rgba(10, 10, 8, 0.76), rgba(10, 10, 8, 0.42) 42%, rgba(10, 10, 8, 0.12));
  content: "";
}

.hero-image {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  width: min(760px, calc(100% - 36px));
  margin: 0 auto 14vh clamp(18px, 7vw, 96px);
}

.eyebrow,
.section-kicker,
.product-type {
  margin: 0 0 12px;
  color: var(--copper);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #f2c087;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 850px;
  margin-bottom: 22px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(48px, 6vw, 86px);
  line-height: 0.96;
  font-weight: 500;
}

h2 {
  margin-bottom: 18px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(34px, 4.3vw, 58px);
  line-height: 1.02;
  font-weight: 500;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.18;
}

.hero-copy {
  max-width: 660px;
  color: rgba(255, 250, 240, 0.88);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-copy.zh {
  max-width: 580px;
  color: rgba(255, 250, 240, 0.72);
  font-size: 16px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid currentColor;
  border-radius: 4px;
  padding: 0 18px;
  font-weight: 750;
  transition: transform 180ms ease, background 180ms ease, color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  color: #fffaf0;
  background: var(--copper);
  border-color: var(--copper);
}

.button.secondary {
  color: inherit;
  background: transparent;
}

.hero-panel {
  position: absolute;
  right: clamp(18px, 5vw, 60px);
  bottom: clamp(18px, 6vw, 64px);
  width: min(360px, calc(100% - 36px));
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px 16px;
  padding: 20px;
  background: rgba(12, 12, 10, 0.46);
  border: 1px solid rgba(255, 250, 240, 0.22);
  border-radius: 8px;
  backdrop-filter: blur(16px);
}

.hero-panel span {
  color: #f2c087;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-panel strong {
  font-size: 14px;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 96px clamp(18px, 4vw, 36px);
}

.section-head {
  max-width: 700px;
  margin-bottom: 34px;
}

.section-head p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
}

.intro {
  padding-top: 78px;
  padding-bottom: 70px;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr);
  gap: clamp(28px, 7vw, 90px);
  align-items: start;
}

.intro-grid p {
  color: var(--muted);
  font-size: 19px;
}

.trust {
  padding-top: 54px;
}

.section-head.compact {
  max-width: 760px;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.trust-grid article {
  min-height: 190px;
  padding: 22px;
  background: #e7efe6;
  border: 1px solid rgba(49, 70, 59, 0.18);
  border-radius: 8px;
}

.trust-grid strong,
.trust-grid span {
  display: block;
}

.trust-grid strong {
  color: var(--forest);
  font-size: 18px;
}

.trust-grid span {
  margin-top: 12px;
  color: #526256;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  min-height: 520px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.product-card div {
  padding: 22px;
}

.product-card p {
  color: var(--muted);
}

.product-card span {
  display: block;
  margin-top: 18px;
  color: var(--forest);
  font-size: 13px;
  font-weight: 800;
}

.card-link {
  display: inline-flex;
  margin-top: 18px;
  color: var(--copper);
  font-size: 13px;
  font-weight: 850;
  border-bottom: 1px solid currentColor;
}

.trade {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(30px, 7vw, 90px);
  align-items: start;
}

.trade-copy p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.text-link {
  display: inline-flex;
  margin-top: 8px;
  color: var(--forest);
  font-weight: 850;
  border-bottom: 1px solid currentColor;
}

.trade-list {
  display: grid;
  gap: 14px;
}

.trade-list div {
  padding: 22px;
  background: #e7efe6;
  border: 1px solid rgba(49, 70, 59, 0.18);
  border-radius: 8px;
}

.trade-list strong,
.trade-list span {
  display: block;
}

.trade-list span {
  margin-top: 8px;
  color: #526256;
}

.project-strip {
  padding: 96px clamp(18px, 4vw, 36px);
  background: #24231f;
  color: #fffaf0;
}

.project-strip .section-head {
  max-width: var(--max);
  margin: 0 auto 34px;
}

.project-strip .section-head p:not(.eyebrow) {
  color: rgba(255, 250, 240, 0.7);
}

.project-grid {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  gap: 16px;
}

figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  background: #141411;
}

figure img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  opacity: 0.92;
}

figure figcaption {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  display: grid;
  gap: 3px;
  padding-top: 18px;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.45);
}

figcaption span {
  color: rgba(255, 250, 240, 0.76);
  font-size: 14px;
}

.custom .compact {
  max-width: 620px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.steps article {
  min-height: 260px;
  padding: 24px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.steps span {
  display: block;
  margin-bottom: 34px;
  color: var(--copper);
  font-weight: 900;
}

.steps p {
  color: var(--muted);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.guide-link {
  display: grid;
  gap: 10px;
  min-height: 180px;
  align-content: start;
  padding: 20px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.guide-link strong {
  color: var(--ink);
  line-height: 1.2;
}

.guide-link span {
  color: var(--muted);
  font-size: 14px;
}

.simple-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 48px);
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.brand.dark {
  color: var(--ink);
}

.simple-header nav {
  display: flex;
  gap: 20px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.detail-page {
  background: var(--paper);
}

.detail-hero {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 0.8fr);
  gap: clamp(28px, 6vw, 70px);
  align-items: center;
  padding: 72px clamp(18px, 4vw, 36px);
}

.detail-hero h1 {
  color: var(--ink);
  font-size: clamp(42px, 5vw, 68px);
}

.detail-hero p:not(.eyebrow) {
  max-width: 640px;
  color: var(--muted);
  font-size: 18px;
}

.detail-hero img {
  width: 100%;
  aspect-ratio: 4 / 4.7;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.detail-layout {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(290px, 0.45fr);
  gap: clamp(28px, 6vw, 70px);
  padding: 48px clamp(18px, 4vw, 36px) 90px;
}

.detail-layout article {
  color: var(--muted);
  font-size: 18px;
}

.detail-layout h2 {
  color: var(--ink);
  font-size: clamp(30px, 3vw, 42px);
}

.detail-layout li {
  margin-bottom: 10px;
}

.spec-box {
  padding: 24px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.spec-box h2 {
  margin-bottom: 18px;
  font-size: 28px;
}

.spec-box dl,
.spec-box dd {
  margin: 0;
}

.spec-box dt {
  margin-top: 16px;
  color: var(--forest);
  font-weight: 900;
}

.spec-box dd,
.spec-box p {
  color: var(--muted);
}

.quote-band {
  max-width: var(--max);
  margin: 0 auto 96px;
  padding: 34px clamp(18px, 4vw, 36px);
  color: #fffaf0;
  background: var(--forest);
  border-radius: 8px;
}

.quote-band h2 {
  max-width: 780px;
  margin-bottom: 10px;
  color: #fffaf0;
}

.quote-band p {
  max-width: 760px;
  color: rgba(255, 250, 240, 0.78);
}

.quote-band .button.secondary {
  color: #fffaf0;
}

.catalog-section,
.quote-form-section,
.quote-cart {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px clamp(18px, 4vw, 36px);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.brochure-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.catalog-card {
  display: grid;
  overflow: hidden;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.brochure-card {
  display: grid;
  align-content: start;
  gap: 14px;
  min-height: 310px;
  padding: 22px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.brochure-card p {
  color: var(--muted);
}

.brochure-actions {
  display: grid;
  gap: 10px;
  margin-top: auto;
}

.brochure-card .button.secondary {
  color: var(--ink);
}

.catalog-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.catalog-card > div {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 22px;
}

.catalog-card p,
.catalog-card dd {
  color: var(--muted);
}

.catalog-card dl,
.catalog-card dd {
  margin: 0;
}

.catalog-card dt {
  margin-top: 8px;
  color: var(--forest);
  font-size: 13px;
  font-weight: 900;
}

.catalog-card .button {
  width: 100%;
  margin-top: 10px;
  color: var(--ink);
}

.quote-cart {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.42fr);
  gap: 24px;
  margin-bottom: 72px;
  background: #e7efe6;
  border-radius: 8px;
}

.quote-cart ul {
  margin: 0;
  padding-left: 20px;
  color: var(--forest);
  font-weight: 800;
}

.quote-cart-actions {
  display: grid;
  align-content: start;
  gap: 12px;
}

.quote-cart-actions .button.secondary {
  color: var(--ink);
}

.quote-form-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.42fr);
  gap: clamp(24px, 5vw, 60px);
  padding-bottom: 96px;
}

.quote-form {
  display: grid;
  gap: 16px;
}

.quote-form label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-weight: 800;
}

.quote-form input,
.quote-form select,
.quote-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;
  color: var(--ink);
  background: var(--paper-strong);
  font: inherit;
  font-weight: 500;
}

.form-note {
  margin: 0;
  padding: 12px 14px;
  color: var(--forest);
  background: #e7efe6;
  border: 1px solid rgba(49, 70, 59, 0.18);
  border-radius: 8px;
  font-size: 14px;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.contact {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.62fr);
  gap: clamp(28px, 7vw, 90px);
  padding: 96px clamp(18px, 4vw, 36px);
  border-top: 1px solid var(--line);
}

.contact-copy p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

.contact-copy .zh {
  font-size: 16px;
}

.contact-note {
  padding: 14px 16px;
  color: var(--forest) !important;
  background: #e7efe6;
  border: 1px solid rgba(49, 70, 59, 0.18);
  border-radius: 8px;
}

.contact-actions {
  display: grid;
  align-content: start;
  gap: 12px;
}

.contact-actions .button {
  width: 100%;
}

.contact-actions .button.secondary {
  color: var(--ink);
}

.contact-card {
  display: grid;
  gap: 4px;
  padding: 16px;
  color: var(--ink);
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.contact-card strong {
  color: var(--forest);
}

.contact-card span {
  font-size: 18px;
  font-weight: 850;
}

.contact-card small {
  color: var(--muted);
  font-size: 14px;
}

.qr-block {
  display: grid;
  gap: 10px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.qr-block img {
  width: 138px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(18px, 4vw, 48px);
  color: rgba(255, 250, 240, 0.76);
  background: #20201c;
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .site-header {
    padding: 14px 18px;
  }

  .brand span {
    max-width: 170px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .nav-toggle {
    display: inline-grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border: 1px solid currentColor;
    border-radius: 4px;
    color: inherit;
    background: transparent;
  }

  .nav-toggle span {
    width: 18px;
    height: 1px;
    background: currentColor;
    transition: transform 180ms ease;
  }

  .nav-toggle.is-open span:first-child {
    transform: translateY(5px) rotate(45deg);
  }

  .nav-toggle.is-open span:last-child {
    transform: translateY(-5px) rotate(-45deg);
  }

  .site-nav {
    position: fixed;
    inset: 70px 14px auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    color: var(--ink);
    background: var(--paper-strong);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 14px;
  }

  .hero {
    min-height: 880px;
  }

  .hero::after {
    background: linear-gradient(180deg, rgba(10, 10, 8, 0.56), rgba(10, 10, 8, 0.78));
  }

  .hero-image {
    object-position: 64% center;
  }

  .hero-content {
    margin: 0 18px 250px;
    width: auto;
  }

  .hero-panel {
    left: 18px;
    right: 18px;
    bottom: 28px;
    width: auto;
  }

  .intro-grid,
  .trade,
  .contact {
    grid-template-columns: 1fr;
  }

  .product-grid,
  .steps,
  .guide-grid,
  .trust-grid,
  .catalog-grid,
  .brochure-grid,
  .quote-cart,
  .quote-form-section {
    grid-template-columns: 1fr;
  }

  .simple-header,
  .simple-header nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .detail-hero,
  .detail-layout {
    grid-template-columns: 1fr;
  }

  .detail-hero {
    padding-top: 44px;
  }

  .product-card {
    min-height: auto;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  figure img {
    height: 420px;
  }

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

@media (max-width: 540px) {
  h1 {
    font-size: 44px;
  }

  h2 {
    font-size: 34px;
  }

  .hero {
    min-height: 820px;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .section,
  .project-strip,
  .contact {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .hero-panel {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .hero-panel strong {
    margin-bottom: 8px;
  }
}