:root {
  --ink: #29251f;
  --muted: #665f55;
  --paper: #fffdf8;
  --cream: #f6efe2;
  --orange: #d86f2c;
  --orange-dark: #a74616;
  --green: #4d6b4f;
  --line: #e5d9c7;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(65, 46, 25, 0.10);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.65;
}

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

a { color: var(--orange-dark); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  z-index: 100;
  padding: .7rem 1rem;
  background: var(--white);
  border: 2px solid var(--orange);
}

.container {
  width: min(1160px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.topbar {
  background: var(--ink);
  color: rgba(255,255,255,.82);
  font-size: .86rem;
}

.topbar .container {
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.topbar a { color: var(--white); text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255,253,248,.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229,217,199,.85);
}

.nav-wrap {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: .02em;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--orange);
  border-radius: 12px 12px 12px 3px;
  font-size: 1.2rem;
}

.brand small {
  display: block;
  color: var(--muted);
  font-weight: 500;
  font-size: .68rem;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: .25rem;
}

.nav-links a {
  padding: .65rem .72rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 650;
  font-size: .92rem;
  border-radius: 999px;
}

.nav-links a:hover,
.nav-links a:focus { background: var(--cream); }

.nav-links .language-link {
  color: var(--orange-dark);
  border: 1px solid var(--line);
}

.hero {
  overflow: hidden;
  background:
    radial-gradient(circle at 85% 15%, rgba(216,111,44,.20), transparent 28%),
    linear-gradient(135deg, #fffaf0 0%, #f7eee0 58%, #efe0c8 100%);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  min-height: 650px;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  padding: 5.5rem 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin: 0 0 1rem;
  color: var(--orange-dark);
  text-transform: uppercase;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .13em;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--orange);
}

h1, h2, h3 { line-height: 1.18; }

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(2.5rem, 5.2vw, 4.9rem);
  letter-spacing: -.045em;
}

.hero .lead {
  max-width: 690px;
  margin: 1.4rem 0 0;
  color: var(--muted);
  font-size: clamp(1.02rem, 1.7vw, 1.25rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 48px;
  padding: .78rem 1.2rem;
  border-radius: 12px;
  border: 1px solid transparent;
  background: var(--orange);
  color: var(--white);
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 10px 25px rgba(167,70,22,.18);
}

.button:hover,
.button:focus { background: var(--orange-dark); }

.button.secondary {
  background: var(--white);
  color: var(--ink);
  border-color: var(--line);
  box-shadow: none;
}

.button.secondary:hover,
.button.secondary:focus { border-color: var(--orange); }

.hero-visual { position: relative; }

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 8% -6% -6% 12%;
  background: var(--green);
  border-radius: 35% 65% 60% 40% / 42% 32% 68% 58%;
  opacity: .14;
  transform: rotate(-5deg);
}

.hero-visual img {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 46% 54% 42% 58% / 45% 38% 62% 55%;
  box-shadow: var(--shadow);
}

.hero-note {
  position: absolute;
  right: -1rem;
  bottom: 2rem;
  max-width: 230px;
  padding: 1rem 1.1rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  font-weight: 750;
  font-size: .9rem;
}

.trust-strip {
  position: relative;
  margin-top: -1px;
  background: var(--ink);
  color: var(--white);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.trust-item {
  padding: 1.6rem 1.2rem;
  border-right: 1px solid rgba(255,255,255,.12);
}

.trust-item:last-child { border-right: 0; }
.trust-item strong { display: block; font-size: 1.05rem; }
.trust-item span { color: rgba(255,255,255,.65); font-size: .82rem; }

.section { padding: 6rem 0; }
.section.alt { background: var(--cream); }

.section-head {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 3rem;
  margin-bottom: 2.8rem;
  align-items: end;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(2rem, 3.7vw, 3.4rem);
  letter-spacing: -.035em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
}

.card {
  padding: 1.55rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 8px 30px rgba(65,46,25,.05);
}

.card h3 { margin: .2rem 0 .6rem; font-size: 1.25rem; }
.card p { margin: 0; color: var(--muted); }

.card-number {
  color: var(--orange);
  font-weight: 900;
  font-size: .78rem;
  letter-spacing: .12em;
}

.product-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
}

.image-stack {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: .8rem;
}

.image-stack img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
  border-radius: 18px;
}

.image-stack img:last-child { margin-top: 2.2rem; }

.product-copy h2 {
  margin: .2rem 0 1rem;
  font-size: clamp(2rem, 3.8vw, 3.4rem);
  letter-spacing: -.035em;
}

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

.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin: 1.5rem 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.spec {
  padding: .9rem 1rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.58);
}

.spec span { display: block; color: var(--muted); font-size: .78rem; }
.spec strong { display: block; margin-top: .15rem; }

.process-list {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  padding: 0;
  list-style: none;
}

.process-list li {
  padding: .55rem .78rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: .87rem;
  font-weight: 700;
}

.process-list li:not(:last-child)::after {
  content: "→";
  margin-left: .8rem;
  color: var(--orange);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: 105px;
  gap: .9rem;
}

.gallery figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: 18px;
  background: #ddd;
}

.gallery figure:nth-child(1) { grid-column: span 7; grid-row: span 4; }
.gallery figure:nth-child(2) { grid-column: span 5; grid-row: span 2; }
.gallery figure:nth-child(3) { grid-column: span 5; grid-row: span 2; }

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

.gallery figcaption {
  position: absolute;
  left: .8rem;
  right: .8rem;
  bottom: .8rem;
  padding: .55rem .7rem;
  color: var(--white);
  background: rgba(24,22,19,.68);
  border-radius: 10px;
  font-size: .78rem;
}

.quality-layout {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 3.5rem;
  align-items: center;
}

.certificate-card {
  padding: 1rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.certificate-card img { border-radius: 10px; }

.fact-list {
  display: grid;
  gap: .8rem;
  margin: 1.5rem 0;
}

.fact-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--line);
}

.fact-row span { color: var(--muted); }

.notice {
  padding: 1rem 1.1rem;
  border-left: 4px solid var(--orange);
  background: #fff7eb;
  color: #5d442c;
  border-radius: 0 12px 12px 0;
  font-size: .9rem;
}

.faq-list { display: grid; gap: .75rem; }

.faq-list details {
  padding: 1rem 1.1rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.faq-list summary { cursor: pointer; font-weight: 800; }
.faq-list p { margin-bottom: .2rem; color: var(--muted); }

.contact-panel {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  overflow: hidden;
  background: var(--ink);
  color: var(--white);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.contact-copy { padding: clamp(2rem, 5vw, 4.2rem); }
.contact-copy h2 { margin: 0 0 1rem; font-size: clamp(2rem, 4vw, 3.5rem); }
.contact-copy p { color: rgba(255,255,255,.72); }

.contact-details {
  padding: clamp(2rem, 4vw, 3.5rem);
  display: grid;
  align-content: center;
  gap: .7rem;
  background: var(--orange);
}

.contact-details a { color: var(--white); font-weight: 800; text-decoration: none; }
.contact-details span { color: rgba(255,255,255,.78); font-size: .85rem; }

.site-footer {
  padding: 2.2rem 0;
  background: #1f1c18;
  color: rgba(255,255,255,.68);
  font-size: .86rem;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-footer a { color: rgba(255,255,255,.88); }

.language-gateway {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
  background:
    radial-gradient(circle at 20% 20%, rgba(216,111,44,.22), transparent 28%),
    linear-gradient(135deg, #fffaf0, #ead8ba);
}

.gateway-card {
  width: min(760px, 100%);
  padding: clamp(2rem, 6vw, 4.5rem);
  text-align: center;
  background: rgba(255,255,255,.92);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.gateway-card h1 { font-size: clamp(2.2rem, 6vw, 4.2rem); }
.gateway-card p { color: var(--muted); }
.gateway-actions { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; margin-top: 2rem; }

@media (max-width: 940px) {
  .nav-wrap { align-items: flex-start; padding: 1rem 0; }
  .nav-links { max-width: 68%; }
  .hero-grid,
  .product-layout,
  .quality-layout,
  .contact-panel { grid-template-columns: 1fr; }
  .hero-grid { padding: 4rem 0; }
  .hero-visual { max-width: 620px; }
  .hero-note { right: 0; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-item:nth-child(2) { border-right: 0; }
  .trust-item:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.12); }
  .section-head { grid-template-columns: 1fr; gap: 1rem; }
}

@media (max-width: 700px) {
  .container { width: min(100% - 1.4rem, 1160px); }
  .topbar .container { padding: .35rem 0; flex-direction: column; align-items: flex-start; gap: 0; }
  .site-header { position: static; }
  .nav-wrap { display: block; }
  .nav-links { max-width: none; margin-top: .8rem; justify-content: flex-start; }
  .nav-links a { padding: .45rem .55rem; font-size: .82rem; }
  .hero-grid { min-height: 0; }
  h1 { font-size: 2.55rem; }
  .hero-note { position: relative; margin: -1.2rem .7rem 0 auto; bottom: auto; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 4.2rem 0; }
  .card-grid { grid-template-columns: 1fr; }
  .image-stack { grid-template-columns: 1fr 1fr; }
  .image-stack img { min-height: 190px; }
  .spec-grid { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; grid-auto-rows: 250px; }
  .gallery figure:nth-child(n) { grid-column: auto; grid-row: auto; }
  .fact-row { grid-template-columns: 1fr; gap: .15rem; }
}