:root {
  --bg: #fffaf2;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: #fffefb;
  --text: #2f241c;
  --muted: #6f6258;
  --line: rgba(120, 96, 75, 0.14);
  --accent: #e28b3f;
  --accent-dark: #9c5d2b;
  --leaf: #6bbd8e;
  --sky: #7ecdf3;
  --warning: #fff2e6;
  --shadow: 0 24px 70px rgba(125, 92, 53, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 214, 161, 0.35), transparent 28%),
    radial-gradient(circle at bottom right, rgba(126, 205, 243, 0.28), transparent 26%),
    var(--bg);
  line-height: 1.65;
}

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

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

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(255, 250, 242, 0.78);
  border-bottom: 1px solid rgba(120, 96, 75, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: inline-grid;
  place-items: center;
  background: linear-gradient(135deg, #ffcd80, #7ecdf3);
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  box-shadow: 0 12px 30px rgba(138, 121, 96, 0.2);
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-text strong {
  font-size: 1rem;
}

.brand-text span {
  color: var(--muted);
  font-size: 0.78rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 0.96rem;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent-dark);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 56px 0 48px;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.32), rgba(255, 250, 242, 0.94)),
    url("./assets/yangguangshu-home.jpg") center / cover no-repeat;
  opacity: 0.26;
}

.hero-layout {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
  gap: 40px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.site-footer h2 {
  margin: 0;
  line-height: 1.14;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  max-width: 11ch;
}

.hero-subtitle {
  margin: 14px 0 20px;
  font-size: 1.15rem;
  color: var(--muted);
}

.hero-description,
.section-heading p,
.info-panel p,
.product-copy p,
.mini-panel p,
.operator-panel p,
.notice-card p,
.filing-note {
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0 34px;
}

.button {
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

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

.button.primary {
  background: linear-gradient(135deg, #f0a14f, #e28b3f);
  color: #fff;
  box-shadow: 0 18px 30px rgba(226, 139, 63, 0.28);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(156, 93, 43, 0.15);
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
}

.hero-facts div,
.info-panel,
.mini-panel,
.operator-panel,
.notice-card,
.filing-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero-facts div {
  padding: 18px;
}

.hero-facts dt {
  color: var(--muted);
  font-size: 0.88rem;
}

.hero-facts dd {
  margin: 6px 0 0;
  font-size: 1.1rem;
  font-weight: 700;
}

.hero-visual {
  justify-self: end;
  width: min(100%, 520px);
  border-radius: 32px;
  overflow: hidden;
  box-shadow: 0 34px 80px rgba(130, 95, 59, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.section {
  padding: 72px 0;
}

.section-soft {
  background: linear-gradient(180deg, rgba(255, 242, 230, 0.4), rgba(255, 255, 255, 0));
}

.section-warn {
  background: linear-gradient(180deg, rgba(255, 246, 238, 0.8), rgba(255, 242, 230, 0.64));
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading h2 {
  font-size: clamp(1.9rem, 4vw, 3rem);
}

.company-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.9fr 0.95fr;
  gap: 20px;
}

.info-panel,
.mini-panel,
.operator-panel,
.notice-card,
.filing-panel {
  padding: 28px;
}

.info-panel h3,
.mini-panel h4,
.notice-card h3,
.filing-panel h3 {
  margin-top: 0;
}

.feature-list,
.contact-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 10px;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--leaf), var(--sky));
}

.product-overview {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px;
  align-items: start;
  margin-bottom: 24px;
}

.product-copy {
  padding: 0 8px 0 0;
}

.product-copy h3 {
  margin-top: 0;
  font-size: 1.5rem;
}

.product-points {
  display: grid;
  gap: 16px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px;
}

.showcase-card {
  margin: 0;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.showcase-card img {
  aspect-ratio: 16 / 11;
  object-fit: cover;
  object-position: center;
}

.showcase-card:not(.showcase-large) img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.showcase-card figcaption {
  padding: 18px 20px 22px;
  color: var(--muted);
}

.operator-panel {
  max-width: 920px;
}

.notice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.notice-card {
  background: rgba(255, 255, 255, 0.74);
}

.site-footer {
  padding: 56px 0 72px;
  background: #2b211c;
  color: rgba(255, 250, 242, 0.92);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 20px;
  align-items: start;
}

.contact-list li {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-list span {
  color: rgba(255, 250, 242, 0.62);
}

.contact-list a:hover,
.contact-list a:focus-visible {
  color: #ffd398;
}

address {
  font-style: normal;
}

.filing-panel {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.08);
  box-shadow: none;
}

.filing-id {
  margin: 10px 0 12px;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: #ffd398;
}

@media (max-width: 980px) {
  .site-nav {
    display: none;
  }

  .hero-layout,
  .company-grid,
  .product-overview,
  .gallery-grid,
  .notice-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    justify-self: stretch;
    width: 100%;
    max-width: 100%;
  }

  .hero h1 {
    max-width: none;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 24px, 1180px);
  }

  .nav {
    min-height: 72px;
  }

  .hero {
    padding-top: 32px;
  }

  .hero-facts {
    grid-template-columns: 1fr;
  }

  .contact-list li {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .info-panel,
  .mini-panel,
  .operator-panel,
  .notice-card,
  .filing-panel {
    padding: 22px;
    border-radius: 20px;
  }

  .hero-visual,
  .showcase-card {
    border-radius: 22px;
  }
}