:root {
  --ink: #152028;
  --ink-soft: #4a5966;
  --paper: #f5f7f8;
  --mist: #e8eef1;
  --line: rgba(21, 32, 40, 0.12);
  --brand: #1b5f73;
  --brand-deep: #0f3d4c;
  --accent: #c47a2c;
  --hero: #f3f7f8;
  --header-h: 4.25rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", sans-serif;
  --font-mark: "Syne", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.75;
  background:
    radial-gradient(900px 480px at 0% 0%, rgba(27, 95, 115, 0.09), transparent 55%),
    radial-gradient(700px 420px at 100% 10%, rgba(196, 122, 44, 0.08), transparent 50%),
    linear-gradient(180deg, var(--paper), var(--mist) 42%, var(--paper));
  min-height: 100vh;
}

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

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.28;
}

p {
  margin: 0;
}

.wrap {
  width: min(1120px, calc(100% - 2.4rem));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-h);
  background: rgba(245, 247, 248, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(21, 32, 40, 0.06);
}

.header-inner {
  width: min(1120px, calc(100% - 2.4rem));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  z-index: 2;
}

.logo-mark {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 0.3rem;
  background:
    linear-gradient(145deg, var(--brand) 0%, var(--brand-deep) 62%, var(--accent) 100%);
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.55rem;
}

.nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  transition: color 0.25s var(--ease);
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.3rem;
  width: 100%;
  height: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--brand-deep);
}

.nav a:hover::after,
.nav a:focus-visible::after {
  transform: scaleX(1);
}

.menu-btn,
.nav-close {
  display: none;
}

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

.hero-media {
  position: absolute;
  inset: 0;
  background:
    url("https://images.unsplash.com/photo-1486312338219-ce68d2c6f44d?auto=format&fit=crop&w=2000&q=80")
      center / cover no-repeat;
  transform: scale(1.05);
  animation: drift 20s var(--ease) infinite alternate;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, rgba(9, 28, 36, 0.9) 8%, rgba(15, 45, 56, 0.68) 48%, rgba(12, 30, 38, 0.38) 100%),
    linear-gradient(180deg, rgba(8, 20, 26, 0.2), rgba(8, 20, 26, 0.58));
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 2.4rem));
  margin: 0 auto;
  padding: calc(var(--header-h) + 3.8rem) 0 5.2rem;
}

.brand {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5vw, 3.45rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
  animation: rise 0.85s var(--ease) 0.1s both;
}

.hero h1 {
  max-width: 14ch;
  font-size: clamp(1.45rem, 3.2vw, 2.25rem);
  font-weight: 600;
  margin-bottom: 0.95rem;
  animation: rise 0.85s var(--ease) 0.26s both;
}

.lead {
  max-width: 34rem;
  color: rgba(243, 247, 248, 0.86);
  margin-bottom: 1.7rem;
  animation: rise 0.85s var(--ease) 0.4s both;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  animation: rise 0.85s var(--ease) 0.54s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0 1.3rem;
  border-radius: 0.4rem;
  font-family: var(--font-mark);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

.btn-primary {
  background: var(--accent);
  color: #1d1408;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #d18938;
}

.btn-line {
  color: var(--hero);
  border-color: rgba(243, 247, 248, 0.45);
  background: transparent;
}

.btn-line:hover,
.btn-line:focus-visible {
  border-color: rgba(243, 247, 248, 0.85);
  background: rgba(243, 247, 248, 0.08);
}

.section {
  padding: clamp(4.4rem, 9vw, 6.8rem) 0;
}

.eyebrow {
  font-family: var(--font-mark);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 0.8rem;
}

.section h2 {
  font-size: clamp(1.65rem, 3.1vw, 2.3rem);
  margin-bottom: 1rem;
}

.copy p,
.desc {
  color: var(--ink-soft);
  max-width: 38rem;
}

.copy p + p {
  margin-top: 0.9rem;
}

.about-grid,
.capability-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.facts {
  display: grid;
  gap: 1.1rem;
  padding-top: 0.35rem;
}

.fact {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.fact .k {
  display: block;
  font-size: 0.84rem;
  color: var(--ink-soft);
  margin-bottom: 0.28rem;
}

.fact .v {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}

.business {
  background:
    linear-gradient(180deg, rgba(27, 95, 115, 0.06), transparent 35%),
    rgba(255, 255, 255, 0.42);
}

.section-head {
  max-width: 40rem;
}

.biz-list {
  list-style: none;
  margin: 2.3rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.biz-list li {
  padding: 1.65rem 0;
  border-bottom: 1px solid var(--line);
}

.biz-list li:nth-child(odd) {
  padding-right: 2rem;
  border-right: 1px solid var(--line);
}

.biz-list li:nth-child(even) {
  padding-left: 2rem;
}

.biz-list h3 {
  font-size: 1.22rem;
  margin-bottom: 0.5rem;
}

.biz-list p {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.35rem;
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.95rem;
  align-items: start;
}

.steps .num {
  font-family: var(--font-mark);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.06em;
  padding-top: 0.2rem;
}

.steps h3 {
  font-size: 1.12rem;
  margin-bottom: 0.3rem;
}

.steps p {
  color: var(--ink-soft);
  font-size: 0.97rem;
}

.contact {
  background:
    linear-gradient(155deg, rgba(27, 95, 115, 0.1), rgba(196, 122, 44, 0.06)),
    var(--paper);
}

.contact-panel {
  padding-top: 0.2rem;
}

.contact-panel .company {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1.35rem;
}

.contact-panel dl {
  margin: 0;
  display: grid;
  gap: 1.05rem;
}

.contact-panel dl > div {
  padding-bottom: 0.95rem;
  border-bottom: 1px solid var(--line);
}

.contact-panel dt {
  font-size: 0.84rem;
  color: var(--ink-soft);
  margin-bottom: 0.22rem;
}

.contact-panel dd {
  margin: 0;
  font-weight: 500;
}

.contact-panel a {
  color: var(--brand-deep);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.site-footer {
  background: var(--brand-deep);
  color: rgba(243, 247, 248, 0.88);
  padding: 2.3rem 0 2rem;
}

.footer-inner {
  display: grid;
  gap: 0.9rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.footer-brand .logo-mark {
  background:
    linear-gradient(145deg, #2a7f96 0%, #1b5f73 55%, #c47a2c 100%);
}

.footer-brand .name {
  font-family: var(--font-display);
  font-weight: 700;
  color: #f3f7f8;
}

.footer-brand .tag,
.copy-right {
  font-size: 0.88rem;
  color: rgba(243, 247, 248, 0.68);
}

.beian a {
  color: rgba(243, 247, 248, 0.92);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  font-size: 0.9rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes drift {
  to {
    transform: scale(1.12) translate3d(-1.1%, -0.8%, 0);
  }
}

@media (max-width: 860px) {
  .menu-btn {
    display: grid;
    place-content: center;
    width: 2.5rem;
    height: 2.5rem;
    cursor: pointer;
    z-index: 2;
  }

  .menu-btn span {
    display: block;
    width: 1.3rem;
    height: 2px;
    margin: 0.28rem 0;
    background: var(--ink);
    transition: transform 0.28s var(--ease);
  }

  .nav-toggle:checked ~ .site-header .menu-btn span:first-child {
    transform: translateY(5px) rotate(45deg);
  }

  .nav-toggle:checked ~ .site-header .menu-btn span:last-child {
    transform: translateY(-5px) rotate(-45deg);
  }

  .nav {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: stretch;
    gap: 0;
    padding: 5rem 1.6rem 2rem;
    background: rgba(245, 247, 248, 0.98);
    transform: translateX(100%);
    transition: transform 0.35s var(--ease);
  }

  .nav-toggle:checked ~ .site-header .nav {
    transform: none;
  }

  .nav a {
    padding: 1rem 0;
    font-size: 1.15rem;
    border-bottom: 1px solid var(--line);
  }

  .nav a::after {
    display: none;
  }

  .nav-close {
    display: block;
    position: absolute;
    inset: 0;
    z-index: -1;
  }

  .about-grid,
  .capability-grid,
  .contact-grid,
  .biz-list {
    grid-template-columns: 1fr;
  }

  .biz-list li,
  .biz-list li:nth-child(odd),
  .biz-list li:nth-child(even) {
    padding: 1.35rem 0;
    border-right: 0;
  }

  .hero-content {
    padding-bottom: 3.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-media,
  .brand,
  .hero h1,
  .lead,
  .actions {
    animation: none !important;
  }
}