:root {
  --bg: #0b1114;
  --bg-soft: #10191d;
  --panel: #152025;
  --panel-2: #f4f0e8;
  --text: #f7f4ee;
  --muted: #a9b4b6;
  --ink: #162025;
  --teal: #35d0b0;
  --amber: #f3b24d;
  --line: rgba(255, 255, 255, 0.12);
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  color: #fff;
  transition: background 0.25s ease, border-color 0.25s ease, padding 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(11, 17, 20, 0.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
  padding-block: 12px;
}

.brand,
.nav,
.header-cta,
.btn,
.contact-link,
.copy-btn {
  min-height: 44px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 46px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.92);
  overflow: hidden;
}

.brand-logo {
  display: block;
  width: 40px;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
}

.nav a {
  padding: 10px 12px;
}

.nav a:hover {
  color: #fff;
}

.header-cta,
.btn,
.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  cursor: pointer;
  font-weight: 800;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.header-cta {
  padding: 0 18px;
  background: var(--teal);
  color: #061412;
}

.header-cta:hover,
.btn:hover,
.copy-btn:hover {
  transform: translateY(-2px);
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: 118px clamp(20px, 5vw, 72px) 72px;
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  object-fit: cover;
  object-position: center right;
  filter: saturate(0.95) contrast(1.04);
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(8, 13, 16, 0.96) 0%, rgba(8, 13, 16, 0.78) 42%, rgba(8, 13, 16, 0.25) 100%),
    linear-gradient(0deg, rgba(11, 17, 20, 0.96) 0%, rgba(11, 17, 20, 0) 32%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 790px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: clamp(40px, 5.5vw, 72px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 650px;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(17px, 2.2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  padding: 13px 22px;
}

.btn-primary {
  background: var(--teal);
  color: #061412;
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 680px;
  margin: 46px 0 0;
}

.hero-stats div {
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(16px);
}

.hero-stats dt {
  color: #fff;
  font-size: 24px;
  font-weight: 900;
}

.hero-stats dd {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 90px clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 34px;
}

h2 {
  max-width: 820px;
  margin-bottom: 0;
  font-size: clamp(30px, 4.2vw, 54px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.3;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 1fr);
  gap: 48px;
  align-items: end;
  background: var(--bg);
}

.intro > p {
  color: #d4dcdb;
  font-size: 20px;
}

.services {
  background: #f4f0e8;
  color: var(--ink);
}

.services .eyebrow {
  color: #0b8f79;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border: 1px solid rgba(22, 32, 37, 0.14);
  gap: 1px;
  background: rgba(22, 32, 37, 0.14);
}

.service-card {
  min-height: 300px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.28);
}

.service-card .icon {
  display: inline-grid;
  width: 42px;
  height: 42px;
  margin-bottom: 48px;
  place-items: center;
  background: #162025;
  color: var(--amber);
  font-size: 13px;
  font-weight: 900;
}

.service-card p {
  color: #536164;
}

.split {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(300px, 1.2fr);
  gap: 54px;
  align-items: start;
}

.work-list {
  border-top: 1px solid var(--line);
}

.work-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 28px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.work-row span {
  color: var(--amber);
  font-size: 14px;
  font-weight: 900;
}

.work-row strong {
  color: #edf4f2;
  font-size: clamp(20px, 2.5vw, 30px);
  line-height: 1.3;
}

.process {
  background: var(--bg-soft);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.timeline li {
  min-height: 260px;
  padding: 26px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
  box-shadow: var(--shadow);
}

.timeline span {
  display: inline-block;
  margin-bottom: 54px;
  color: var(--teal);
  font-weight: 900;
}

.timeline p {
  color: var(--muted);
}

.cta {
  display: grid;
  grid-template-columns: minmax(300px, 1fr) minmax(280px, 420px);
  gap: 44px;
  align-items: center;
  background: #e9f7f2;
  color: var(--ink);
}

.cta .eyebrow {
  color: #0b8f79;
}

.cta p {
  max-width: 720px;
  color: #4b5c5e;
  font-size: 18px;
}

.contact-card {
  display: grid;
  gap: 12px;
  padding: 22px;
  border: 1px solid rgba(22, 32, 37, 0.14);
  background: #fff;
  box-shadow: 0 18px 45px rgba(22, 32, 37, 0.12);
}

.contact-link,
.copy-btn {
  width: 100%;
  padding: 14px 16px;
  background: #f1f5f3;
  color: #162025;
  font-weight: 900;
  overflow-wrap: anywhere;
}

.contact-link {
  display: grid;
  gap: 4px;
}

.contact-link span {
  color: #667579;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.contact-link strong {
  color: #162025;
  font-size: 17px;
  line-height: 1.35;
}

.copy-btn {
  background: #162025;
  color: #fff;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.beian-link:hover {
  color: #fff;
}

@media (max-width: 1180px) {
  .service-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .nav {
    display: none;
  }

  .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .service-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .intro,
  .split,
  .cta {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding-inline: 16px;
  }

  .brand span:last-child {
    max-width: 8em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .header-cta {
    padding-inline: 14px;
  }

  .hero {
    min-height: 860px;
    padding: 104px 16px 52px;
  }

  .hero-image {
    object-position: 64% center;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(8, 13, 16, 0.98) 0%, rgba(8, 13, 16, 0.82) 68%, rgba(8, 13, 16, 0.5) 100%),
      linear-gradient(0deg, rgba(11, 17, 20, 0.97) 0%, rgba(11, 17, 20, 0) 36%);
  }

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

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

  .section {
    padding: 72px 16px;
  }

  .footer {
    flex-direction: column;
    padding-inline: 16px;
  }
}