:root {
  --bg: #f5efe6;
  --paper: rgba(255, 251, 245, 0.9);
  --paper-strong: #fffaf3;
  --ink: #1c1a17;
  --muted: #5c5348;
  --line: rgba(28, 26, 23, 0.1);
  --accent: #8d341f;
  --accent-deep: #5f2115;
  --ocean: #103f6c;
  --teal: #106f80;
  --night: #091418;
  --shadow: 0 24px 70px rgba(57, 37, 21, 0.12);
  --radius-lg: 28px;
  --radius-md: 20px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(16, 111, 128, 0.12), transparent 26%),
    radial-gradient(circle at right 20%, rgba(141, 52, 31, 0.14), transparent 24%),
    linear-gradient(180deg, #fbf6ee 0%, #f5efe6 44%, #efe3d2 100%);
  font-family: "Source Han Sans SC", "PingFang SC", "Helvetica Neue", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(28, 26, 23, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 26, 23, 0.03) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 88%);
}

.product-shell {
  width: min(1200px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 124px 0 0;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  width: 100%;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 251, 245, 0.84);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1200px, calc(100vw - 40px));
  margin: 0 auto;
  gap: 18px;
}

.header-brand {
  color: var(--ink);
  text-decoration: none;
  font-family: "Source Han Serif SC", "Songti SC", "Times New Roman", serif;
  font-size: 1.3rem;
  font-weight: 700;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.header-nav a {
  color: #40372f;
  text-decoration: none;
  font-weight: 600;
}

.lang-switch {
  position: relative;
}

.lang-toggle {
  padding: 10px 14px;
  border: 1px solid rgba(28, 26, 23, 0.12);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.74);
  font: inherit;
  cursor: pointer;
}

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  display: grid;
  min-width: 160px;
  padding: 8px;
  border: 1px solid rgba(28, 26, 23, 0.12);
  border-radius: 14px;
  background: #fffdf9;
  box-shadow: 0 18px 40px rgba(28, 26, 23, 0.12);
  z-index: 20;
}

[hidden] {
  display: none !important;
}

.lang-menu button {
  padding: 10px 12px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.lang-menu button:hover {
  background: rgba(141, 52, 31, 0.08);
}

.catalog-hero,
.detail-hero,
.section-panel,
.catalog-card {
  border: 1px solid var(--line);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.catalog-hero,
.detail-hero {
  padding: 34px 36px;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(145deg, rgba(255, 251, 245, 0.94), rgba(241, 230, 213, 0.8)),
    var(--paper);
}

.back-link {
  display: inline-flex;
  align-items: center;
  margin-bottom: 18px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.catalog-kicker,
.detail-kicker,
.section-kicker,
.catalog-type {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent);
}

.catalog-hero h1,
.detail-hero h1,
.section-title {
  margin: 0;
  font-family: "Source Han Serif SC", "Songti SC", "Times New Roman", serif;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.catalog-hero h1,
.detail-hero h1 {
  font-size: clamp(2.8rem, 5.2vw, 5rem);
  line-height: 0.98;
}

.catalog-summary,
.detail-summary,
.section-copy,
.catalog-card p,
.hero-meta p,
.bullet-list li {
  line-height: 1.85;
  color: #40372f;
}

.catalog-summary,
.detail-summary {
  max-width: 760px;
  margin: 18px 0 0;
  font-size: 1.08rem;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.catalog-card {
  grid-column: span 4;
  min-height: 250px;
  padding: 24px;
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(255, 252, 247, 0.94), rgba(242, 231, 215, 0.9));
  text-decoration: none;
  color: inherit;
}

.catalog-media {
  overflow: hidden;
  margin: -8px -8px 18px;
  border-radius: 16px;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.18);
}

.catalog-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.catalog-card-primary {
  grid-column: span 8;
  background:
    linear-gradient(135deg, rgba(16, 63, 108, 0.92), rgba(16, 111, 128, 0.92)),
    var(--ocean);
  color: #f8fbff;
}

.catalog-card-wide {
  grid-column: span 12;
  min-height: 210px;
  background:
    linear-gradient(135deg, rgba(9, 20, 24, 0.96), rgba(13, 83, 101, 0.9)),
    var(--night);
  color: #f6fcff;
}

.catalog-card-primary .catalog-type,
.catalog-card-wide .catalog-type,
.catalog-card-primary p,
.catalog-card-wide p {
  color: rgba(248, 251, 255, 0.86);
}

.catalog-card h2 {
  margin: 0;
  font-size: 1.7rem;
  font-family: "Source Han Serif SC", "Songti SC", "Times New Roman", serif;
}

.catalog-card p {
  margin: 18px 0 0;
}

.site-footer {
  position: relative;
  left: 50%;
  width: 100vw;
  margin-left: -50vw;
  margin-top: 30px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(255, 251, 245, 0.94), rgba(239, 227, 210, 0.86));
  box-shadow: var(--shadow);
}

.footer-grid {
  display: grid;
  width: min(1200px, calc(100vw - 40px));
  margin: 0 auto;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

.footer-kicker {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.footer-column h2 {
  margin: 0 0 12px;
  font-size: 1.3rem;
  font-family: "Source Han Serif SC", "Songti SC", "Times New Roman", serif;
}

.footer-column p,
.footer-links li,
.footer-links a {
  color: #40372f;
  line-height: 1.8;
}

.footer-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links li + li {
  margin-top: 8px;
}

.footer-links a {
  text-decoration: none;
}

.footer-subscribe {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.footer-subscribe input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(28, 26, 23, 0.12);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.74);
  font: inherit;
}

.footer-subscribe button {
  padding: 12px 16px;
  border: 0;
  border-radius: 12px;
  color: #fffaf4;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.detail-layout {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

.detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 22px;
  align-items: end;
}

.hero-meta {
  padding: 22px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(28, 26, 23, 0.08);
}

.hero-meta h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
  font-family: "Source Han Serif SC", "Songti SC", "Times New Roman", serif;
}

.hero-meta p {
  margin: 0;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
}

.section-panel {
  grid-column: span 6;
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--paper-strong);
}

.section-panel-wide {
  grid-column: span 12;
}

.section-title {
  font-size: 1.6rem;
}

.section-copy {
  margin: 16px 0 0;
}

.bullet-list {
  margin: 16px 0 0;
  padding-left: 18px;
}

.bullet-list li + li {
  margin-top: 10px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 20px;
}

.cta-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 180ms ease, background-color 180ms ease;
}

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

.cta-link-primary {
  color: #fff8f3;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
}

.cta-link-secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(28, 26, 23, 0.08);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 560ms ease, transform 560ms ease;
}

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

@media (max-width: 980px) {
  .product-shell {
    width: min(100vw - 24px, 1200px);
    padding-top: 150px;
    padding-bottom: 0;
  }

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

  .catalog-card,
  .catalog-card-primary,
  .catalog-card-wide,
  .section-panel,
  .section-panel-wide {
    grid-column: span 1;
    min-height: auto;
  }

  .footer-grid {
    width: min(100vw - 24px, 1200px);
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .header-inner {
    width: min(100vw - 24px, 1200px);
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  .catalog-hero,
  .detail-hero {
    padding: 28px 22px;
  }

  .header-nav {
    width: 100%;
    justify-content: space-between;
  }

  .lang-switch,
  .lang-toggle {
    width: 100%;
  }

  .site-header {
    padding: 14px 0;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .cta-row {
    flex-direction: column;
  }

  .cta-link {
    width: 100%;
  }
}