:root {
  --ink: #12202c;
  --ink-soft: #3a4d5c;
  --paper: #f3f6f8;
  --line: rgba(18, 32, 44, 0.12);
  --accent: #0f8f86;
  --accent-deep: #0a6b65;
  --hero-ink: #f5faf9;
  --shadow: 0 24px 60px rgba(10, 28, 36, 0.28);
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --max: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 143, 134, 0.08), transparent 32%),
    linear-gradient(180deg, #eef3f5 0%, var(--paper) 40%, #e8eef1 100%);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem clamp(1.25rem, 4vw, 3rem);
  background: linear-gradient(180deg, rgba(8, 18, 24, 0.55), rgba(8, 18, 24, 0));
  color: var(--hero-ink);
}

.brand-mark {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2rem);
  font-size: 0.92rem;
}

.nav a {
  opacity: 0.86;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

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

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--hero-ink);
}

.hero-media {
  position: absolute;
  inset: 0;
  background:
    url("hero.jpg") center / cover no-repeat;
  transform: scale(1.06);
  animation: hero-zoom 18s ease-out forwards;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 18, 24, 0.78) 0%, rgba(7, 18, 24, 0.46) 48%, rgba(7, 18, 24, 0.28) 100%),
    linear-gradient(180deg, rgba(7, 18, 24, 0.2) 0%, rgba(7, 18, 24, 0.72) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: clamp(6rem, 14vh, 9rem) clamp(1.25rem, 4vw, 3rem) clamp(4rem, 10vh, 6.5rem);
  animation: rise 1s ease both;
}

.brand-hero {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 5.4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.06em;
  text-shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
}

.hero h1 {
  margin: 0;
  max-width: 16ch;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.2vw, 2.15rem);
  font-weight: 600;
  line-height: 1.35;
}

.hero-lead {
  margin: 1.15rem 0 0;
  max-width: 34rem;
  color: rgba(245, 250, 249, 0.86);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0 1.35rem;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--accent-deep);
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.14);
}

.section {
  padding: clamp(4.5rem, 10vw, 7rem) clamp(1.25rem, 4vw, 3rem);
}

.section-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
  animation: rise 0.9s ease both;
  animation-timeline: view();
  animation-range: entry 10% cover 30%;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent-deep);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.section h2 {
  margin: 0;
  max-width: 14ch;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  line-height: 1.25;
}

.section-lead {
  margin: 1.1rem 0 0;
  max-width: 42rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.about {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0.2));
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: 2.75rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.about-grid h3 {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.about-grid p {
  margin: 0;
  color: var(--ink-soft);
}

.services {
  background:
    linear-gradient(135deg, rgba(15, 143, 134, 0.08), transparent 40%),
    linear-gradient(180deg, #e7eef1, #f4f7f8);
}

.service-list {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
}

.service-list li {
  display: grid;
  gap: 0.55rem;
  padding: 1.5rem 1.25rem 1.5rem 0;
  border-top: 1px solid var(--line);
}

.service-list li:nth-child(even) {
  padding-left: 1.5rem;
  border-left: 1px solid var(--line);
}

.service-list strong {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}

.service-list span {
  color: var(--ink-soft);
}

.culture {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.25));
}

.value-list {
  list-style: none;
  margin: 2.4rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem 1.5rem;
  border-top: 1px solid var(--line);
  padding-top: 1.75rem;
}

.value-list li {
  display: grid;
  gap: 0.4rem;
}

.value-list strong {
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.value-list span {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.culture-note {
  margin: 2rem 0 0;
  max-width: 48rem;
  color: var(--ink-soft);
}

.contact {
  background: #102029;
  color: #e8f1f0;
}

.contact .eyebrow {
  color: #7fd4cd;
}

.contact .section-lead {
  color: rgba(232, 241, 240, 0.78);
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem 2rem;
  margin: 2.5rem 0 0;
}

.contact-list div {
  margin: 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.contact-list dt {
  margin: 0 0 0.35rem;
  color: rgba(232, 241, 240, 0.58);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
}

.contact-list dd {
  margin: 0;
  font-size: 1.05rem;
}

.contact-list a {
  color: #9fe3dc;
  border-bottom: 1px solid rgba(159, 227, 220, 0.35);
  transition: color 0.25s ease, border-color 0.25s ease;
}

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

.site-footer {
  background: #0b171e;
  color: rgba(232, 241, 240, 0.72);
  padding: 2rem clamp(1.25rem, 4vw, 3rem) 2.4rem;
  text-align: center;
}

.footer-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.footer-brand {
  margin: 0;
  color: #f3fafa;
  font-family: var(--font-display);
  font-size: 1rem;
}

.footer-copy,
.footer-beian {
  margin: 0.55rem 0 0;
  font-size: 0.9rem;
}

.footer-beian a {
  color: #9fe3dc;
  border-bottom: 1px solid rgba(159, 227, 220, 0.4);
  transition: color 0.25s ease, border-color 0.25s ease;
}

.footer-beian a:hover,
.footer-beian a:focus-visible {
  color: #fff;
  border-color: #fff;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hero-zoom {
  from {
    transform: scale(1.06);
  }
  to {
    transform: scale(1);
  }
}

@media (max-width: 800px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
  }

  .nav {
    gap: 1rem;
    font-size: 0.86rem;
  }

  .about-grid,
  .service-list,
  .value-list,
  .contact-list {
    grid-template-columns: 1fr;
  }

  .service-list li:nth-child(even) {
    padding-left: 0;
    border-left: 0;
  }

  .hero-content {
    padding-bottom: 3.5rem;
  }
}

@supports not (animation-timeline: view()) {
  .section-inner {
    animation: none;
  }
}