:root {
  --bg: #f5f1e8;
  --surface: rgba(255, 255, 255, 0.74);
  --surface-strong: #ffffff;
  --text: #18232f;
  --muted: #5f6974;
  --line: rgba(24, 35, 47, 0.1);
  --primary: #17324f;
  --primary-strong: #0d243d;
  --accent: #b7893c;
  --accent-soft: rgba(183, 137, 60, 0.12);
  --shadow: 0 20px 60px rgba(17, 28, 43, 0.12);
  --radius: 24px;
  --container: min(1180px, calc(100vw - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(183, 137, 60, 0.18), transparent 28%),
    radial-gradient(circle at right 20%, rgba(23, 50, 79, 0.12), transparent 30%),
    linear-gradient(180deg, #f8f5ee 0%, #f2ede3 48%, #f8f7f3 100%);
}

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

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

.container {
  width: var(--container);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(248, 245, 238, 0.72);
  border-bottom: 1px solid rgba(24, 35, 47, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), #325b80);
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.brand-text strong {
  font-size: 15px;
}

.brand-text small {
  font-size: 11px;
  color: var(--muted);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 22px;
  font-size: 14px;
  color: var(--muted);
}

.nav-links a:hover {
  color: var(--primary);
}

.section {
  padding: 88px 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.34);
  border-top: 1px solid rgba(24, 35, 47, 0.04);
  border-bottom: 1px solid rgba(24, 35, 47, 0.04);
}

.hero {
  padding: 56px 0 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1,
.section-heading h2,
.contact-copy h2 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 68px);
  max-width: 10ch;
}

.hero-text,
.about-copy p,
.contact-copy p,
.intro-grid p,
.product-card p,
.advantage-item p,
.timeline p,
.values-list span {
  color: var(--muted);
  line-height: 1.85;
}

.hero-text {
  max-width: 620px;
  margin: 22px 0 0;
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 30px 0 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--primary), #2b567a);
  color: #fff;
  box-shadow: 0 18px 38px rgba(23, 50, 79, 0.22);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(23, 50, 79, 0.12);
}

.hero-stats {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.hero-stats li,
.intro-grid article,
.values-card,
.product-card,
.advantage-item,
.timeline article,
.contact-card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.hero-stats li {
  padding: 18px 20px;
  border-radius: 18px;
}

.hero-stats strong {
  display: block;
  font-size: 24px;
  color: var(--primary);
}

.hero-stats span {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  color: var(--muted);
}

.hero-visual {
  position: relative;
  min-height: 560px;
}

.visual-panel {
  position: absolute;
  inset: 48px 24px 24px 48px;
  border-radius: 32px;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.9), rgba(233, 227, 214, 0.55)),
    linear-gradient(135deg, rgba(23, 50, 79, 0.1), transparent);
  border: 1px solid rgba(255, 255, 255, 0.9);
}

.visual-main,
.visual-side {
  position: absolute;
  z-index: 1;
  border-radius: 28px;
  padding: 28px;
}

.visual-main {
  top: 0;
  right: 0;
  width: min(100%, 320px);
  background: linear-gradient(160deg, var(--primary-strong), #284c6e);
  color: #fff;
}

.visual-main span,
.visual-side p {
  display: block;
  margin-bottom: 16px;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.72;
}

.visual-main strong {
  display: block;
  font-size: 42px;
  line-height: 1.1;
}

.visual-side {
  left: 0;
  bottom: 0;
  width: min(100%, 280px);
  background: rgba(255, 252, 246, 0.94);
}

.visual-side ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.visual-side li {
  position: relative;
  padding-left: 18px;
  color: var(--text);
}

.visual-side li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.intro-band {
  padding-top: 12px;
}

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

.intro-grid article {
  padding: 28px;
  border-radius: 22px;
}

.intro-grid span {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.08em;
}

.intro-grid h2,
.section-heading h2,
.contact-copy h2 {
  font-size: clamp(30px, 4vw, 48px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: start;
}

.about-copy,
.contact-copy {
  padding-right: 12px;
}

.about-copy p {
  margin: 0 0 18px;
  font-size: 16px;
}

.values-card {
  border-radius: var(--radius);
  padding: 34px;
  background:
    linear-gradient(180deg, rgba(23, 50, 79, 0.96), rgba(14, 35, 58, 0.96)),
    var(--surface);
  color: #fff;
}

.values-card h3 {
  margin: 0 0 22px;
  font-size: 26px;
}

.values-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 20px;
}

.values-list li {
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.values-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.values-list strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.values-list span {
  color: rgba(255, 255, 255, 0.78);
}

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

.product-card,
.advantage-item {
  border-radius: 22px;
  padding: 28px;
}

.product-card h3,
.advantage-item h3,
.timeline strong {
  margin: 0 0 14px;
  font-size: 22px;
}

.accent-card {
  background:
    linear-gradient(180deg, rgba(183, 137, 60, 0.16), rgba(255, 255, 255, 0.82)),
    var(--surface);
}

.advantage-item span {
  display: inline-flex;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.12em;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.timeline article {
  position: relative;
  border-radius: 22px;
  padding: 28px 24px;
}

.timeline article::before {
  content: "";
  display: block;
  width: 44px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  margin-bottom: 18px;
}

.contact-grid {
  gap: 32px;
}

.contact-card {
  border-radius: 28px;
  padding: 18px 26px;
}

.contact-row {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 16px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.contact-row:last-child {
  border-bottom: 0;
}

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

.contact-row a,
.contact-row strong {
  font-size: 17px;
  line-height: 1.7;
}

.site-footer {
  padding: 28px 0 44px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid rgba(24, 35, 47, 0.08);
  color: var(--muted);
  font-size: 14px;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (max-width: 1080px) {
  .hero-grid,
  .about-grid,
  .contact-grid,
  .intro-grid,
  .products-grid,
  .advantage-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 420px;
  }

  .visual-panel {
    inset: 40px 20px 20px 40px;
  }
}

@media (max-width: 760px) {
  .section {
    padding: 72px 0;
  }

  .nav {
    align-items: flex-start;
    padding: 16px 0;
    flex-direction: column;
  }

  .nav-links {
    gap: 14px;
    justify-content: flex-start;
  }

  .hero {
    padding-top: 32px;
  }

  .hero h1 {
    max-width: none;
  }

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

  .visual-main {
    width: calc(100% - 20px);
  }

  .visual-side {
    width: calc(100% - 20px);
  }

  .contact-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .brand-text small {
    display: none;
  }
}