:root {
  --orange: #f25522;
  --orange-deep: #c93d18;
  --amber: #ffb15a;
  --ink: #171412;
  --muted: #6f625a;
  --line: rgba(28, 22, 17, 0.13);
  --paper: #f8f2ea;
  --cream: #fffaf3;
  --sage: #7e8b73;
  --bronze: #9a6645;
  --shadow: 0 24px 80px rgba(35, 22, 12, 0.16);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(242, 85, 34, 0.04) 1px, transparent 1px),
    linear-gradient(180deg, #fffaf5 0%, #f1e7d9 42%, #fff7ee 100%);
  background-size: 72px 72px, auto;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

body.nav-open {
  overflow: hidden;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 14px clamp(20px, 5vw, 72px);
  background: rgba(255, 250, 243, 0.84);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.site-header.is-elevated {
  border-bottom-color: var(--line);
  box-shadow: 0 12px 36px rgba(37, 25, 16, 0.08);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: min(260px, 58vw);
  height: 42px;
  overflow: hidden;
}

.brand img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: left center;
  mix-blend-mode: multiply;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.4vw, 34px);
  color: #4e443d;
  font-size: 14px;
  letter-spacing: 0;
}

.desktop-nav a {
  position: relative;
  padding: 8px 0;
}

.desktop-nav a::after {
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
  content: "";
}

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

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--cream);
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
  transition: transform 180ms ease;
}

.mobile-nav {
  position: fixed;
  inset: 76px 0 auto 0;
  z-index: 40;
  display: none;
  padding: 16px 24px 24px;
  background: rgba(255, 250, 243, 0.96);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.mobile-nav a {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  color: #3c332d;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: clamp(32px, 6vw, 88px);
  min-height: calc(100vh - 76px);
  padding: clamp(52px, 7vw, 92px) clamp(20px, 5vw, 72px) clamp(44px, 6vw, 76px);
  overflow: hidden;
}

.hero::before {
  position: absolute;
  inset: auto -10vw 7vh auto;
  width: 52vw;
  height: 52vw;
  max-width: 780px;
  max-height: 780px;
  background: radial-gradient(circle, rgba(242, 85, 34, 0.18), rgba(242, 85, 34, 0) 62%);
  content: "";
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 1;
  align-self: center;
  max-width: 760px;
}

.eyebrow,
.section-kicker,
.card-topline {
  margin: 0 0 16px;
  color: var(--orange-deep);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1,
h2 {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 24px;
  font-size: clamp(48px, 8vw, 108px);
  line-height: 0.98;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.08;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.25;
}

.hero-lede {
  max-width: 660px;
  margin-bottom: 34px;
  color: #4f463f;
  font-size: clamp(18px, 2vw, 24px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #fff;
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 14px 34px rgba(242, 85, 34, 0.28);
}

.button.secondary {
  color: var(--ink);
  background: rgba(255, 250, 243, 0.66);
}

.hero-visual {
  position: relative;
  z-index: 1;
  align-self: center;
  min-height: min(640px, 70vh);
}

.window-scene {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(23, 20, 18, 0.22);
  border-radius: var(--radius);
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.58), rgba(255, 255, 255, 0.05) 36%, rgba(126, 139, 115, 0.13)),
    linear-gradient(180deg, #f7efe3, #d6c3ac 62%, #b98b66 63%, #704d39);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.window-scene::before,
.window-scene::after {
  position: absolute;
  background: rgba(23, 20, 18, 0.78);
  content: "";
}

.window-scene::before {
  top: 0;
  bottom: 0;
  left: 18%;
  width: 12px;
}

.window-scene::after {
  right: 0;
  bottom: 37%;
  left: 0;
  height: 10px;
}

.sun-disc {
  position: absolute;
  top: 14%;
  right: 16%;
  width: 136px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--amber), var(--orange));
  filter: blur(0.2px);
}

.film-sheet {
  position: absolute;
  top: 16%;
  bottom: 25%;
  left: 28%;
  width: 42%;
  border: 1px solid rgba(255, 255, 255, 0.82);
  background:
    linear-gradient(110deg, rgba(255, 255, 255, 0.68), rgba(255, 255, 255, 0.16) 45%, rgba(242, 85, 34, 0.12)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.2) 0 1px, transparent 1px 18px);
  box-shadow: 0 18px 55px rgba(54, 32, 20, 0.16);
  transform: skewY(-3deg);
}

.sheet-line {
  position: absolute;
  right: 16px;
  left: 16px;
  height: 1px;
  background: rgba(23, 20, 18, 0.13);
}

.sheet-line:nth-child(1) {
  top: 22%;
}

.sheet-line:nth-child(2) {
  top: 48%;
}

.sheet-line:nth-child(3) {
  top: 74%;
}

.room-surface {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 30%;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.16), transparent 40%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.12) 0 1px, transparent 1px 112px),
    linear-gradient(180deg, #a97854, #6c4733);
}

.hero-badge {
  position: absolute;
  right: clamp(18px, 3vw, 36px);
  bottom: clamp(18px, 3vw, 36px);
  display: flex;
  align-items: center;
  gap: 14px;
  width: min(280px, 72%);
  padding: 18px;
  color: #fff;
  background: rgba(23, 20, 18, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  box-shadow: 0 20px 55px rgba(23, 20, 18, 0.24);
}

.hero-badge strong {
  color: var(--amber);
  font-family: "Avenir Next", sans-serif;
  font-size: 44px;
  line-height: 1;
}

.hero-badge span {
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  line-height: 1.45;
}

.proof-strip,
.content-section,
.contact-section {
  margin: 0 clamp(20px, 5vw, 72px);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.proof-strip div {
  min-height: 128px;
  padding: 28px 24px;
  border-right: 1px solid var(--line);
}

.proof-strip div:last-child {
  border-right: 0;
}

.proof-strip strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.proof-strip span,
.section-body p,
.section-intro,
.product-card p,
.product-card li,
.trust-copy p,
.credential-heading p,
.factory-copy p,
.auth-notice p,
.timeline p,
.contact-section p {
  color: var(--muted);
}

.content-section {
  padding: clamp(72px, 10vw, 132px) 0;
}

.split {
  display: grid;
  grid-template-columns: 0.68fr 1.1fr 1.2fr;
  gap: clamp(24px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
}

.section-body {
  max-width: 780px;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 28px;
}

.advantage-grid article,
.product-card,
.timeline article,
.contact-card {
  background: rgba(255, 250, 243, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.advantage-grid article {
  min-height: 188px;
  padding: 24px;
}

.advantage-grid span {
  display: block;
  margin-bottom: 18px;
  color: var(--orange);
  font-weight: 800;
}

.product-section {
  border-bottom: 1px solid var(--line);
}

.section-intro {
  max-width: 720px;
  margin-bottom: 34px;
  font-size: 18px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.product-card {
  position: relative;
  min-height: 390px;
  padding: 28px;
  overflow: hidden;
}

.product-card::before {
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--orange);
  content: "";
}

.product-card.featured {
  color: #fff;
  background:
    linear-gradient(150deg, rgba(242, 85, 34, 0.86), rgba(23, 20, 18, 0.92)),
    #2d211a;
  border-color: transparent;
}

.product-card.featured p,
.product-card.featured li,
.product-card.featured .card-topline {
  color: rgba(255, 255, 255, 0.78);
}

.product-card ul {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.product-card li {
  position: relative;
  padding-left: 18px;
}

.product-card li::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
  content: "";
}

.trust-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.72fr);
  gap: clamp(28px, 6vw, 82px);
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.trust-list {
  display: grid;
  gap: 10px;
  margin: 30px 0 0;
}

.trust-list div {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.trust-list dt {
  color: var(--muted);
}

.trust-list dd {
  margin: 0;
  font-weight: 700;
}

.certificate-card {
  margin: 0;
  padding: 12px;
  background: #201d1b;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.certificate-card img {
  width: 100%;
  max-height: 720px;
  border-radius: 4px;
  object-fit: cover;
  object-position: center;
}

.certificate-card figcaption {
  padding: 12px 4px 2px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 13px;
}

.certification-section {
  border-bottom: 1px solid var(--line);
}

.factory-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(22px, 4vw, 52px);
  align-items: start;
  margin-top: 34px;
}

.factory-copy {
  position: sticky;
  top: 104px;
  padding: 28px;
  background: rgba(255, 250, 243, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.factory-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.factory-gallery figure,
.credential-grid figure {
  margin: 0;
  overflow: hidden;
  background: rgba(255, 250, 243, 0.76);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.factory-gallery img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.factory-gallery figcaption,
.credential-grid figcaption {
  padding: 12px 14px;
  color: #574b43;
  font-size: 13px;
}

.credential-wall {
  margin-top: clamp(46px, 7vw, 82px);
}

.credential-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.credential-heading h3 {
  margin-bottom: 0;
  font-size: clamp(25px, 3vw, 38px);
}

.credential-heading p {
  max-width: 420px;
  margin-bottom: 4px;
}

.credential-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.credential-grid figure {
  background: rgba(255, 255, 255, 0.82);
}

.credential-grid img {
  width: 100%;
  height: 230px;
  object-fit: contain;
  padding: 16px;
  background: #fff;
}

.auth-notice {
  display: grid;
  grid-template-columns: minmax(220px, 0.56fr) 1fr;
  gap: 24px;
  align-items: center;
  margin-top: 18px;
  padding: 18px;
  background: rgba(23, 20, 18, 0.88);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.auth-notice img {
  width: 100%;
  max-height: 280px;
  object-fit: cover;
  border-radius: 4px;
}

.auth-notice strong {
  display: block;
  margin-bottom: 8px;
  color: #fff;
  font-size: 24px;
}

.auth-notice p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.74);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  margin-top: 34px;
}

.timeline article {
  min-height: 230px;
  padding: 24px;
}

.timeline span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-bottom: 24px;
  color: #fff;
  background: var(--ink);
  border-radius: 50%;
  font-weight: 800;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: clamp(28px, 6vw, 82px);
  align-items: center;
  padding: clamp(66px, 9vw, 118px) clamp(20px, 5vw, 58px);
  color: #fff;
  background:
    linear-gradient(130deg, rgba(23, 20, 18, 0.94), rgba(81, 52, 35, 0.94)),
    var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-section .eyebrow,
.contact-section p {
  color: rgba(255, 255, 255, 0.76);
}

.contact-card {
  display: grid;
  gap: 12px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.18);
  font-style: normal;
}

.contact-card a {
  color: var(--amber);
  font-weight: 800;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 34px clamp(20px, 5vw, 72px);
  color: var(--muted);
  font-size: 14px;
}

.site-footer img {
  width: 210px;
  height: 38px;
  object-fit: contain;
  object-position: left center;
  mix-blend-mode: multiply;
}

.section-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 560ms ease, transform 560ms ease;
}

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

@media (max-width: 1080px) {
  .hero,
  .split,
  .trust-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: 520px;
  }

  .product-grid,
  .proof-strip,
  .factory-gallery,
  .credential-grid,
  .timeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .factory-panel {
    grid-template-columns: 1fr;
  }

  .factory-copy {
    position: static;
  }
}

@media (max-width: 760px) {
  .desktop-nav {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .mobile-nav.is-open {
    display: block;
  }

  .menu-button[aria-expanded="true"] span:first-child {
    transform: translateY(3.5px) rotate(42deg);
  }

  .menu-button[aria-expanded="true"] span:last-child {
    transform: translateY(-3.5px) rotate(-42deg);
  }

  .site-header {
    min-height: 68px;
  }

  .brand {
    height: 34px;
  }

  .mobile-nav {
    inset-block-start: 68px;
  }

  .hero {
    padding-top: 40px;
  }

  h1 {
    font-size: clamp(42px, 13vw, 64px);
  }

  h2 {
    font-size: clamp(31px, 9vw, 44px);
  }

  .hero-visual {
    min-height: 430px;
  }

  .proof-strip,
  .product-grid,
  .advantage-grid,
  .factory-gallery,
  .credential-grid,
  .auth-notice,
  .timeline {
    grid-template-columns: 1fr;
  }

  .credential-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .factory-gallery img,
  .credential-grid img {
    height: auto;
    max-height: 360px;
  }

  .proof-strip div {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .proof-strip div:last-child {
    border-bottom: 0;
  }

  .product-card,
  .timeline article {
    min-height: auto;
  }

  .trust-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .contact-section {
    margin-inline: 12px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}