:root {
  --ink: #071622;
  --ink-2: #0d2436;
  --navy: #123049;
  --fog: #d7e2ea;
  --paper: #f3f6f8;
  --teal: #2bb5a8;
  --teal-deep: #1a8f85;
  --gold: #c9a36a;
  --text: #142433;
  --muted: #5d7283;
  --white: #ffffff;
  --line: rgba(18, 48, 73, 0.12);
  --shadow: 0 28px 70px rgba(7, 22, 34, 0.18);
  --header-h: 78px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-cn: "Noto Serif SC", "Songti SC", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Cormorant Garamond", "Noto Serif SC", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(43, 181, 168, 0.08), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(201, 163, 106, 0.08), transparent 50%),
    linear-gradient(180deg, #f7fafb 0%, #eef3f6 48%, #f7fafb 100%);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; border: 0; background: none; cursor: pointer; }

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  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='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 clamp(20px, 4vw, 56px);
  transition: background 0.35s var(--ease), backdrop-filter 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.site-header.scrolled {
  background: rgba(7, 22, 34, 0.78);
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(7, 22, 34, 0.18);
}
.site-header.scrolled .brand,
.site-header.scrolled .nav a,
.site-header.scrolled .menu-toggle {
  color: var(--white);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  min-width: 0;
}
.brand-mark {
  width: 42px;
  height: 42px;
  color: var(--white);
  display: grid;
  place-items: center;
  flex: 0 0 auto;
}
.brand-mark svg { width: 100%; height: 100%; }
.brand-mark.small { width: 36px; height: 36px; color: var(--fog); }
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand-cn {
  font-family: var(--font-cn);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}
.brand-en {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  opacity: 0.72;
  margin-top: 3px;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 36px);
}
.nav a {
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  position: relative;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 1px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}
.nav a:hover::after { transform: scaleX(1); }

.header-cta {
  color: var(--ink);
  background: linear-gradient(135deg, #dff7f3, #b8ebe4 45%, #dcc79a);
  padding: 10px 18px;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(43, 181, 168, 0.28);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  color: var(--white);
  position: relative;
}
.menu-toggle span {
  position: absolute;
  left: 10px;
  right: 10px;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.3s var(--ease), top 0.3s var(--ease);
}
.menu-toggle span:first-child { top: 16px; }
.menu-toggle span:last-child { top: 24px; }
.menu-toggle[aria-expanded="true"] span:first-child {
  top: 20px;
  transform: rotate(40deg);
}
.menu-toggle[aria-expanded="true"] span:last-child {
  top: 20px;
  transform: rotate(-40deg);
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  align-items: end;
  color: var(--white);
  overflow: hidden;
}
.hero-media {
  position: absolute;
  inset: 0;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  animation: heroZoom 18s var(--ease) forwards;
}
.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 22, 34, 0.42) 0%, rgba(7, 22, 34, 0.28) 35%, rgba(7, 22, 34, 0.78) 100%),
    linear-gradient(90deg, rgba(7, 22, 34, 0.55) 0%, rgba(7, 22, 34, 0.08) 58%, rgba(7, 22, 34, 0.35) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  width: min(1120px, calc(100% - clamp(40px, 8vw, 120px)));
  margin: 0 auto;
  padding: calc(var(--header-h) + 48px) 0 110px;
}
.hero-brand {
  margin: 0 0 18px;
  font-family: var(--font-cn);
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  font-weight: 600;
  letter-spacing: 0.22em;
  text-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}
.hero-title {
  margin: 0;
  max-width: 10ch;
  font-family: var(--font-cn);
  font-size: clamp(2.6rem, 6vw, 4.8rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: 0.08em;
}
.hero-lead {
  margin: 24px 0 0;
  max-width: 34rem;
  color: rgba(243, 246, 248, 0.86);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  font-weight: 300;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  letter-spacing: 0.08em;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--teal), var(--teal-deep));
  color: var(--white);
}
.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: var(--white);
  background: rgba(255, 255, 255, 0.04);
}
.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.85);
  background: rgba(255, 255, 255, 0.1);
}

.hero-scroll {
  position: absolute;
  right: clamp(20px, 4vw, 56px);
  bottom: 36px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.7);
  font-family: var(--font-display);
  letter-spacing: 0.28em;
  font-size: 0.78rem;
}
.hero-scroll i {
  width: 1px;
  height: 54px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.8), transparent);
  transform-origin: top;
  animation: scrollLine 2.2s var(--ease) infinite;
}

.section {
  padding: clamp(72px, 10vw, 120px) 0;
}
.section-inner {
  width: min(1120px, calc(100% - clamp(40px, 8vw, 120px)));
  margin: 0 auto;
}
.eyebrow {
  margin: 0 0 14px;
  color: var(--teal-deep);
  letter-spacing: 0.28em;
  font-size: 0.82rem;
  text-transform: uppercase;
}
.eyebrow.light { color: #8fe0d7; }
.section-title {
  margin: 0;
  font-family: var(--font-cn);
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.06em;
  color: var(--ink);
}
.section-title.light { color: var(--white); }
.section-text {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 40rem;
}
.section-text.narrow { max-width: 46rem; }
.section-text.light { color: rgba(243, 246, 248, 0.78); }
.section-head { margin-bottom: 42px; }

.about-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}
.about-meta {
  display: grid;
  gap: 18px;
  margin: 36px 0 0;
  padding: 0;
}
.about-meta div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.about-meta dt {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}
.about-meta dd {
  margin: 0;
  color: var(--ink);
  font-weight: 500;
}
.about-visual {
  margin: 0;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.about-visual img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  transition: transform 1.2s var(--ease);
}
.about-visual:hover img { transform: scale(1.04); }
.about-visual figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 18px 20px;
  background: linear-gradient(180deg, transparent, rgba(7, 22, 34, 0.78));
  color: rgba(255, 255, 255, 0.9);
  letter-spacing: 0.18em;
  font-size: 0.88rem;
}

.service-stage {
  margin-bottom: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.service-stage img {
  width: 100%;
  height: clamp(220px, 32vw, 380px);
  object-fit: cover;
  transform: scale(1.02);
}
.service-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.service-item {
  background: rgba(255, 255, 255, 0.78);
  padding: clamp(24px, 3vw, 36px);
  transition: background 0.35s var(--ease), transform 0.35s var(--ease);
}
.service-item:hover {
  background: #fff;
  transform: translateY(-3px);
}
.service-num {
  display: block;
  margin-bottom: 14px;
  color: var(--gold);
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.12em;
}
.service-item h3 {
  margin: 0 0 10px;
  font-family: var(--font-cn);
  font-size: 1.28rem;
  letter-spacing: 0.08em;
}
.service-item p {
  margin: 0;
  color: var(--muted);
}

.values {
  background:
    linear-gradient(180deg, rgba(18, 48, 73, 0.03), rgba(18, 48, 73, 0.02)),
    linear-gradient(135deg, rgba(43, 181, 168, 0.08), transparent 45%);
}
.values-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}
.value-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.value-list li {
  display: grid;
  gap: 6px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.value-list li:last-child { border-bottom: 1px solid var(--line); }
.value-list strong {
  font-family: var(--font-cn);
  font-size: 1.25rem;
  letter-spacing: 0.1em;
  color: var(--ink);
}
.value-list span { color: var(--muted); }

.contact-panel {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: stretch;
  padding: clamp(28px, 4vw, 48px);
  background:
    linear-gradient(135deg, rgba(18, 48, 73, 0.96), rgba(7, 22, 34, 0.96)),
    url("assets/hero.jpg") center / cover;
  color: var(--white);
  box-shadow: var(--shadow);
}
.contact-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 28px 24px;
  backdrop-filter: blur(8px);
}
.contact-label {
  margin: 0 0 6px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.86rem;
  letter-spacing: 0.12em;
}
.contact-label + .contact-value + .contact-label { margin-top: 18px; }
.contact-value {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}
.contact-value a {
  color: #9fe7df;
  border-bottom: 1px solid rgba(159, 231, 223, 0.45);
}

.site-footer {
  background: var(--ink);
  color: rgba(243, 246, 248, 0.72);
  padding: 42px 0 34px;
}
.footer-inner {
  width: min(1120px, calc(100% - clamp(40px, 8vw, 120px)));
  margin: 0 auto;
  display: grid;
  gap: 22px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.footer-brand strong {
  display: block;
  color: var(--white);
  font-family: var(--font-cn);
  letter-spacing: 0.12em;
}
.footer-brand span {
  display: block;
  margin-top: 4px;
  font-family: var(--font-display);
  letter-spacing: 0.22em;
  font-size: 0.78rem;
  opacity: 0.7;
}
.footer-icp {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  font-size: 0.92rem;
}
.footer-icp a {
  color: #9fe7df;
  border-bottom: 1px solid rgba(159, 231, 223, 0.35);
}
.copyright {
  margin: 0;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.88rem;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: none;
}
.delay-1 { transition-delay: 0.12s; }
.delay-2 { transition-delay: 0.22s; }
.delay-3 { transition-delay: 0.32s; }

@keyframes heroZoom {
  from { transform: scale(1.08); }
  to { transform: scale(1); }
}
@keyframes scrollLine {
  0% { transform: scaleY(0); opacity: 0; }
  30% { opacity: 1; }
  100% { transform: scaleY(1); opacity: 0; }
}

@media (max-width: 960px) {
  .nav, .header-cta { display: none; }
  .menu-toggle { display: inline-block; }
  .site-header.open {
    background: rgba(7, 22, 34, 0.94);
  }
  .site-header.open .nav {
    display: flex;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 24px 24px;
    background: rgba(7, 22, 34, 0.96);
  }
  .site-header.open .nav a {
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--white);
  }
  .site-header.open .header-cta {
    display: inline-flex;
    position: absolute;
    top: calc(var(--header-h) + 220px);
    left: 24px;
  }
  .about-grid,
  .values-grid,
  .contact-panel,
  .service-list {
    grid-template-columns: 1fr;
  }
  .about-visual img { aspect-ratio: 16 / 10; }
  .hero-scroll { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero-media img,
  .hero-scroll i,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}