:root {
  --ink: #0c1a24;
  --ink-soft: #243746;
  --paper: #f4f7f5;
  --mist: #d7e4dc;
  --brand: #0f6b5c;
  --brand-deep: #0a4a40;
  --accent: #e8a317;
  --accent-soft: #f3d28a;
  --line: rgba(12, 26, 36, 0.12);
  --shadow: 0 24px 60px rgba(12, 26, 36, 0.14);
  --font-display: "Space Grotesk", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--paper);
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 80;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  transition: background 0.35s ease, backdrop-filter 0.35s ease, box-shadow 0.35s ease;
}
.nav.is-solid {
  background: rgba(244, 247, 245, 0.88);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line);
}
.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}
.nav-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, var(--brand) 0%, #178f7a 55%, var(--accent) 100%);
  box-shadow: inset 0 0 0 2px rgba(255,255,255,0.25);
  position: relative;
}
.nav-mark::after {
  content: "";
  position: absolute;
  left: 7px;
  right: 7px;
  bottom: 8px;
  height: 3px;
  border-radius: 2px;
  background: rgba(255,255,255,0.9);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.95rem;
}
.nav-links a { opacity: 0.78; transition: opacity 0.2s; }
.nav-links a:hover { opacity: 1; }
.nav-cta {
  padding: 8px 14px !important;
  border-radius: 999px;
  background: var(--ink);
  color: #fff !important;
  opacity: 1 !important;
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  background: transparent;
  padding: 10px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  margin: 6px 0;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  align-items: end;
  padding: 120px 28px 72px;
  color: #f7fbf9;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 520px at 80% 20%, rgba(232, 163, 23, 0.22), transparent 55%),
    linear-gradient(160deg, #062821 0%, #0b3d34 42%, #123a4a 100%);
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, #000 20%, transparent 90%);
  animation: gridDrift 28s linear infinite;
}
.hero-glow {
  position: absolute;
  width: 480px;
  height: 480px;
  right: -80px;
  top: 10%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(23, 143, 122, 0.55), transparent 68%);
  animation: pulse 7s ease-in-out infinite;
}
.hero-lane {
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: 18%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(243, 210, 138, 0.85), transparent);
  transform: rotate(-8deg);
  animation: laneSweep 5.5s ease-in-out infinite;
}
.hero-lane::before,
.hero-lane::after {
  content: "";
  position: absolute;
  top: -70px;
  width: 120px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.18);
  animation: carPass 5.5s ease-in-out infinite;
}
.hero-lane::after {
  top: 40px;
  width: 90px;
  animation-delay: 1.2s;
}
.hero-inner {
  position: relative;
  z-index: 1;
  width: min(920px, 100%);
}
.hero-kicker {
  margin: 0 0 18px;
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-soft);
}
.hero-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 9vw, 6.4rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.03em;
}
.hero-lead {
  margin: 28px 0 0;
  max-width: 640px;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: rgba(247, 251, 249, 0.86);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}
.hero-scroll {
  position: absolute;
  right: 28px;
  bottom: 28px;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: rgba(247, 251, 249, 0.55);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--accent);
  color: #1b1303;
}
.btn-ghost {
  border: 1px solid rgba(255,255,255,0.35);
  color: #fff;
}
.contact .btn-primary { color: #1b1303; }

.section {
  padding: 96px 0;
}
.section-head {
  margin-bottom: 48px;
  max-width: 620px;
}
.section-head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  letter-spacing: -0.02em;
}
.section-head p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.about { background: #eef4f0; }
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 36px;
  align-items: stretch;
}
.about-copy p {
  margin: 0 0 18px;
  color: var(--ink-soft);
  font-size: 1.05rem;
}
.about-stats {
  display: grid;
  gap: 14px;
}
.stat {
  background: #fff;
  border-radius: 18px;
  padding: 22px 24px;
  box-shadow: var(--shadow);
}
.stat-num {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--brand-deep);
  line-height: 1;
}
.stat-unit {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--brand-deep);
  margin-left: 2px;
}
.stat-label {
  display: block;
  margin-top: 8px;
  color: var(--ink-soft);
}

.biz-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.biz-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 28px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.biz-item:hover {
  transform: translateY(-4px);
  border-color: rgba(15, 107, 92, 0.35);
}
.biz-index {
  display: block;
  font-family: var(--font-display);
  color: var(--brand);
  font-weight: 700;
  margin-bottom: 14px;
}
.biz-item h3 {
  margin: 0 0 10px;
  font-size: 1.35rem;
}
.biz-item p {
  margin: 0;
  color: var(--ink-soft);
}

.products {
  background:
    linear-gradient(180deg, rgba(15, 107, 92, 0.06), transparent 40%),
    var(--paper);
}
.product-stage {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  gap: 16px;
}
.product-card {
  border-radius: 24px;
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  min-height: 240px;
}
.product-card.is-main {
  background: linear-gradient(160deg, #0f6b5c, #123a4a);
  color: #f7fbf9;
  border: 0;
}
.product-tag {
  margin: 0 0 14px;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  opacity: 0.7;
}
.product-card h3 {
  margin: 0 0 12px;
  font-size: 1.5rem;
}
.product-card p {
  margin: 0;
  color: inherit;
  opacity: 0.86;
}

.strength-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.strength-list li {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 18px;
  align-items: baseline;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.strength-list li:last-child { border-bottom: 1px solid var(--line); }
.strength-list strong {
  font-size: 1.15rem;
}
.strength-list span { color: var(--ink-soft); }

.contact-panel {
  background: linear-gradient(145deg, #0c1a24, #123a4a 55%, #0f6b5c);
  color: #f7fbf9;
  border-radius: 28px;
  padding: 42px 40px;
  display: grid;
  gap: 28px;
  box-shadow: var(--shadow);
}
.contact-panel h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.6rem);
}
.contact-panel > div > p {
  margin: 0;
  opacity: 0.82;
}
.contact-meta {
  margin: 0;
  display: grid;
  gap: 16px;
}
.contact-meta dt {
  font-size: 0.82rem;
  opacity: 0.6;
  margin-bottom: 4px;
}
.contact-meta dd {
  margin: 0;
  font-size: 1.05rem;
}
.contact-meta a:hover { color: var(--accent-soft); }

.footer {
  padding: 36px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.92rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 600;
}
.footer-links a { opacity: 0.75; }
.footer-links a:hover { opacity: 1; }
.footer-sep { margin: 0 8px; opacity: 0.45; }

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes gridDrift {
  from { transform: translateY(0); }
  to { transform: translateY(72px); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.85; }
  50% { transform: scale(1.08); opacity: 1; }
}
@keyframes laneSweep {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 0.9; }
}
@keyframes carPass {
  0% { left: 8%; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { left: 78%; opacity: 0; }
}

@media (max-width: 900px) {
  .about-grid,
  .biz-list,
  .product-stage { grid-template-columns: 1fr; }
  .strength-list li { grid-template-columns: 1fr; gap: 6px; }
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    inset: 70px 16px auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(244, 247, 245, 0.96);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 10px;
    box-shadow: var(--shadow);
  }
  .nav-links.is-open { display: flex; }
  .nav-links a {
    padding: 12px 14px;
    border-radius: 10px;
  }
  .nav-cta { text-align: center; }
  .hero { align-items: center; padding-bottom: 100px; }
  .hero-scroll { display: none; }
  .contact-panel { padding: 32px 24px; }
}