:root {
  --font-sans: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  --font-latin: "Segoe UI", "Microsoft YaHei", sans-serif;
  --bg: #ebe6dd;
  --surface: rgba(255, 252, 246, 0.82);
  --surface-strong: #fffaf3;
  --text: #0f1e2e;
  --muted: #53606d;
  --line: rgba(15, 30, 46, 0.12);
  --accent: #d2a463;
  --accent-deep: #aa7b39;
  --accent-soft: #efe1ca;
  --shadow: 0 24px 70px rgba(15, 30, 46, 0.11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(210, 164, 99, 0.20), transparent 32%),
    radial-gradient(circle at top right, rgba(15, 30, 46, 0.12), transparent 28%),
    linear-gradient(180deg, #f3ede3 0%, #e9e3da 100%);
}

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

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(235, 230, 221, 0.86);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 78px;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 14px;
}

.menu {
  display: flex;
  gap: 28px;
  color: var(--muted);
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 2px;
  background: transparent;
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.menu a:hover,
.nav-cta:hover {
  color: var(--accent-deep);
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button:hover,
.nav-cta:hover {
  transform: translateY(-1px);
}

.nav-cta,
.button.primary {
  background: var(--text);
  color: #fff;
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
}

.hero,
.page-hero {
  position: relative;
}

.hero {
  padding: 72px 0 44px;
}

.page-hero {
  padding: 88px 0 28px;
}

.hero::after,
.page-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: min(42vw, 520px);
  height: min(42vw, 520px);
  border-radius: 48px 0 0 0;
  background:
    linear-gradient(135deg, rgba(15, 30, 46, 0.06), rgba(210, 164, 99, 0.10)),
    repeating-linear-gradient(
      90deg,
      rgba(15, 30, 46, 0.04),
      rgba(15, 30, 46, 0.04) 1px,
      transparent 1px,
      transparent 28px
    ),
    repeating-linear-gradient(
      0deg,
      rgba(15, 30, 46, 0.04),
      rgba(15, 30, 46, 0.04) 1px,
      transparent 1px,
      transparent 28px
    );
  pointer-events: none;
}

.hero-grid,
.operate-grid,
.strip-grid,
.contact-box {
  display: grid;
  gap: 28px;
}

.hero-grid {
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-deep);
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.narrow {
  max-width: 860px;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-sans);
  line-height: 1.06;
}

h1 {
  font-size: clamp(2.6rem, 5vw, 5rem);
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.03em;
}

h3 {
  font-size: 1.2rem;
}

.hero-text,
.section-head,
.solution-card p,
.industry-card p,
.timeline p,
.operate-list p,
.contact-box p {
  color: var(--muted);
}

.hero-text {
  font-size: 1.12rem;
  max-width: 680px;
  margin: 22px 0 0;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.hero-points {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  color: var(--muted);
}

.hero-points li::before {
  content: "•";
  margin-right: 10px;
  color: var(--accent);
}

.hero-card,
.solution-card,
.industry-card,
.contact-box,
.signal-card,
.timeline article {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 22px;
  border-radius: 28px;
}

.signal-card {
  padding: 26px;
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(15, 30, 46, 0.96), rgba(30, 47, 67, 0.92));
  color: #fff;
}

.signal-label {
  margin: 0 0 14px;
  color: #ead3ae;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.signal-card h2 {
  font-size: 1.9rem;
}

.signal-card p {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.7;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 16px;
}

.metric-grid article {
  padding: 20px;
  border-radius: 18px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
}

.metric-grid strong {
  display: block;
  font-family: "Manrope", sans-serif;
  font-size: 1.4rem;
  color: var(--accent-deep);
}

.metric-grid span {
  margin-top: 6px;
  display: block;
  color: var(--muted);
}

.section {
  padding: 84px 0;
}

.alt {
  background: rgba(255, 250, 242, 0.66);
  border-top: 1px solid rgba(15, 30, 46, 0.06);
  border-bottom: 1px solid rgba(15, 30, 46, 0.06);
}

.intro-strip {
  padding: 26px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.strip-grid {
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
}

.strip-grid p {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.strip-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.strip-tags span {
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid var(--line);
  color: var(--muted);
}

.section-head {
  max-width: 760px;
  margin-bottom: 28px;
}

.card-grid {
  display: grid;
  gap: 18px;
}

.card-grid.four {
  grid-template-columns: repeat(4, 1fr);
}

.card-grid.three {
  grid-template-columns: repeat(3, 1fr);
}

.solution-card,
.industry-card {
  border-radius: 24px;
  padding: 24px;
}

.solution-card p,
.industry-card p {
  margin: 14px 0 0;
  line-height: 1.75;
}

.solution-card ul {
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.8;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.timeline article {
  border-radius: 24px;
  padding: 24px;
}

.timeline span {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-deep);
  font-size: 0.82rem;
  font-weight: 800;
}

.timeline h3 {
  margin-top: 16px;
}

.timeline p {
  margin-top: 12px;
  line-height: 1.75;
}

.operate-grid {
  grid-template-columns: 0.8fr 1.2fr;
  align-items: start;
}

.operate-list {
  display: grid;
  gap: 16px;
}

.operate-list article {
  padding: 22px 24px;
  border-left: 4px solid var(--accent);
  background: rgba(255, 255, 255, 0.58);
}

.operate-list p {
  margin: 10px 0 0;
  line-height: 1.75;
}

.contact-box {
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  padding: 32px;
  border-radius: 28px;
}

.contact-actions {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 14px;
}

.detail-grid,
.about-layout,
.contact-grid {
  display: grid;
  gap: 18px;
}

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

.about-layout,
.contact-grid {
  grid-template-columns: repeat(3, 1fr);
}

.detail-card,
.case-card {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  border-radius: 24px;
  padding: 26px;
}

.detail-card p,
.detail-card ul,
.case-card p {
  color: var(--muted);
  line-height: 1.8;
}

.detail-card ul {
  margin: 16px 0 0;
  padding-left: 18px;
}

.case-stack {
  display: grid;
  gap: 20px;
}

.case-tag {
  margin: 0 0 10px;
  color: var(--accent-deep);
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.case-columns {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 18px;
}

.site-footer {
  padding: 56px 0 22px;
  border-top: 1px solid rgba(210, 164, 99, 0.42);
  background: rgba(15, 30, 46, 0.98);
  color: rgba(255, 255, 255, 0.82);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1.1fr;
  gap: 48px;
  align-items: start;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  color: #fff;
}

.footer-brand img {
  width: 42px;
  height: 42px;
  border-radius: 14px;
}

.footer-note,
.footer-contact p {
  margin: 10px 0 0;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.68);
}

.footer-label {
  margin: 0 0 16px;
  color: #d2a463;
  font: 700 11px/1.2 Manrope, sans-serif;
  letter-spacing: .16em;
}

.footer-links,
.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-links a,
.footer-contact-line {
  margin-top: 9px;
  color: rgba(255, 255, 255, 0.68);
  line-height: 1.55;
}

.footer-links a:hover {
  color: #d2a463;
}

.footer-contact p {
  max-width: 300px;
  margin-top: 16px;
}

.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.46);
  font-size: 12px;
  line-height: 1.7;
}

.footer-records {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: flex-end;
}

.footer-records a {
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
  line-height: 1.7;
}

.footer-records a:hover {
  color: #d2a463;
}

@media (max-width: 980px) {
  .hero-grid,
  .strip-grid,
  .operate-grid,
  .contact-box,
  .card-grid.four,
  .card-grid.three,
  .timeline,
  .detail-grid,
  .about-layout,
  .contact-grid,
  .case-columns,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .menu {
    display: none;
  }

  .nav {
    position: relative;
  }

  .menu-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-header .menu.is-open {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 10px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(13, 26, 38, 0.98);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.24);
    color: rgba(255, 255, 255, 0.82);
  }

  .site-header .menu.is-open a {
    padding: 13px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .site-header .menu.is-open a:last-child {
    border-bottom: 0;
  }

  .strip-tags,
  .contact-actions {
    justify-content: flex-start;
  }

  .footer-meta {
    justify-self: start;
    text-align: left;
  }

  .footer-records {
    justify-content: flex-start;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .site-header {
    position: static;
  }

  .hero {
    padding-top: 36px;
  }

  .hero-card,
  .solution-card,
  .industry-card,
  .timeline article,
  .contact-box,
  .detail-card,
  .case-card {
    border-radius: 22px;
  }

  .metric-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    flex-wrap: wrap;
    padding: 14px 0;
  }
}

/* Homepage: full-bleed infrastructure presentation */
.home-page {
  background: #f2f0eb;
  color: #132331;
}

.home-container {
  width: min(1440px, calc(100% - 96px));
  margin: 0 auto;
}

.home-header {
  position: absolute;
  width: 100%;
  background: rgba(12, 24, 36, 0.72);
  border-bottom: 1px solid rgba(255,255,255,.16);
  color: #fff;
}

.home-header .brand { color: #fff; }
.home-header .menu { color: rgba(255,255,255,.72); }
.home-header .menu a:hover { color: #d2a463; }
.home-header .nav-cta { background: #d2a463; color: #132331; border-radius: 2px; }

.home-hero {
  position: relative;
  min-height: min(860px, 100vh);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: #0b1722;
  color: #fff;
}

.home-hero-images,
.home-hero-slide,
.home-hero-shade { position: absolute; inset: 0; }
.home-hero-images { overflow:hidden; }
.home-hero-slide { opacity:0; background-position:center; background-size:cover; background-repeat:no-repeat; transform:scale(1.035); transition:opacity 1.1s ease, transform 7s ease; }
.home-hero-slide.is-active { opacity:1; transform:scale(1.01); }
.home-hero-datacenter { background-image:url("assets/hero-datacenter.jpg"); background-image:image-set(url("assets/hero-datacenter.webp") type("image/webp"), url("assets/hero-datacenter.jpg") type("image/jpeg")); }
.home-hero-network { background-position:center 46%; }
.home-hero-compute { background-position:center 52%; }
.home-hero-shade { background: linear-gradient(90deg, rgba(7,18,28,.94) 0%, rgba(7,18,28,.72) 38%, rgba(7,18,28,.18) 80%), linear-gradient(0deg, rgba(7,18,28,.72), transparent 48%); }
.home-hero-content { position: relative; z-index: 1; padding: 150px 0 126px; }
.home-kicker { margin: 0 0 22px; color: #d2a463; font: 700 12px/1.2 Manrope,sans-serif; letter-spacing: .16em; }
.home-kicker-dark { color: #a5793e; }
.home-hero h1 { max-width: 930px; font-family: var(--font-sans); font-size: 78px; line-height: 1.1; letter-spacing: 0; font-weight: 700; }
.home-hero h1 em, .home-section-heading h2 em { color: #d2a463; font-style: normal; }
.home-hero-lead { max-width: 650px; margin: 28px 0 0; color: rgba(255,255,255,.78); font-size: 18px; line-height: 1.9; }
.home-hero-actions { display:flex; align-items:center; gap: 28px; margin-top: 38px; }
.home-button { display:inline-flex; align-items:center; gap: 26px; min-height: 48px; padding: 0 18px; border-radius: 2px; font-weight: 700; }
.home-button span, .home-text-link span { font-family: Manrope,sans-serif; font-size: 18px; }
.home-button-light { background: #fff; color: #132331; }
.home-text-link { color: rgba(255,255,255,.78); border-bottom: 1px solid rgba(255,255,255,.45); padding-bottom: 8px; }
.home-hero-bottom { position: absolute; z-index: 1; bottom: 30px; left: 50%; display:flex; justify-content:space-between; color: rgba(255,255,255,.56); font: 11px Manrope,sans-serif; letter-spacing:.12em; transform: translateX(-50%); }
.home-carousel-controls { position:absolute; z-index:2; right:48px; bottom:76px; display:flex; align-items:center; background:rgba(8,20,30,.72); border:1px solid rgba(255,255,255,.22); backdrop-filter:blur(10px); }
.home-carousel-controls button { width:44px; height:44px; border:0; border-right:1px solid rgba(255,255,255,.16); background:transparent; color:#fff; cursor:pointer; font:18px/1 Manrope,sans-serif; }
.home-carousel-controls button:last-child { border-right:0; border-left:1px solid rgba(255,255,255,.16); }
.home-carousel-controls button:hover, .home-carousel-controls button:focus-visible { background:#d2a463; color:#132331; outline:0; }
.home-carousel-count { min-width:72px; text-align:center; color:rgba(255,255,255,.56); font:11px Manrope,sans-serif; letter-spacing:.12em; }
.home-carousel-count b { color:#fff; font-weight:700; }

.home-service-index { background: #d2a463; color: #132331; }
.service-index-grid { display:grid; grid-template-columns: repeat(4,1fr); }
.service-index-grid a { min-height: 118px; display:grid; grid-template-columns: 42px 1fr; grid-template-rows: 1fr 1fr; align-content:center; padding: 22px 28px; border-right:1px solid rgba(19,35,49,.2); }
.service-index-grid a:first-child { padding-left: 0; }
.service-index-grid a:last-child { border-right:0; }
.service-index-grid span { grid-row: 1 / 3; font: 700 14px Manrope,sans-serif; }
.service-index-grid strong { font-size: 17px; }
.service-index-grid small { align-self:end; color: rgba(19,35,49,.68); }

.home-section { padding: 132px 0; }
.home-services { background: #f2f0eb; }
.home-section-heading { display:grid; grid-template-columns: 1fr 1.15fr; column-gap: 72px; align-items:start; margin-bottom: 76px; }
.home-section-heading .home-kicker { grid-column: 1; }
.home-section-heading h2 { grid-column: 1; font-size: 52px; line-height:1.18; letter-spacing:0; }
.home-section-heading > p:last-child { grid-column: 2; grid-row: 1 / span 2; max-width: 480px; align-self:end; margin: 0; color: #62717b; line-height: 1.9; }
.service-list { border-top: 1px solid #bdc2c0; }
.service-row { display:grid; grid-template-columns: 90px 1fr 48px; gap: 28px; align-items:start; padding: 33px 0; border-bottom:1px solid #bdc2c0; }
.service-number { color:#a5793e; font: 700 14px Manrope,sans-serif; }
.service-row h3 { font-size: 25px; letter-spacing:0; }
.service-row p { max-width: 710px; margin: 10px 0 0; color: #62717b; line-height:1.8; }
.service-arrow { justify-self:end; color:#a5793e; font: 24px Manrope,sans-serif; }

.home-process { padding: 116px 0; background:#132331; color:#fff; }
.home-process .home-kicker { color:#d2a463; }
.home-process-intro { display:grid; grid-template-columns:1fr 1.15fr; column-gap:72px; margin-bottom: 72px; }
.home-process h2 { font-size:52px; line-height:1.18; letter-spacing:0; }
.process-grid { display:grid; grid-template-columns:repeat(4,1fr); border-top:1px solid rgba(255,255,255,.28); }
.process-grid > div { min-height: 215px; padding: 27px 24px 0 0; border-right:1px solid rgba(255,255,255,.18); }
.process-grid > div:not(:first-child) { padding-left:24px; }
.process-grid > div:last-child { border-right:0; }
.process-grid span, .scenario-list span { color:#d2a463; font: 700 13px Manrope,sans-serif; }
.process-grid h3 { margin-top:52px; font-size:19px; letter-spacing:0; }
.process-grid p { max-width:210px; margin:10px 0 0; color:rgba(255,255,255,.62); font-size:14px; line-height:1.75; }

.home-deliverables { padding:124px 0; background:#f2f0eb; }
.deliverables-layout { display:grid; grid-template-columns:.85fr 1.15fr; gap:72px; }
.deliverables-heading h2 { font-size:52px; line-height:1.18; letter-spacing:0; }
.deliverables-heading h2 em { color:#a5793e; font-style:normal; }
.deliverables-heading > p:last-of-type { max-width:440px; margin:24px 0 0; color:#62717b; line-height:1.85; }
.section-text-link, .project-brief-link { display:inline-block; margin-top:24px; padding-bottom:7px; border-bottom:1px solid rgba(19,35,49,.4); color:#132331; font-weight:700; }
.section-text-link span, .project-brief-link span { color:#a5793e; }
.project-brief-link { color:#fff; border-color:rgba(255,255,255,.42); }
.deliverables-list { display:grid; grid-template-columns:repeat(2,1fr); border-top:1px solid #aeb4b2; }
.deliverables-list > div { min-height:178px; padding:22px 24px 18px 0; border-bottom:1px solid #aeb4b2; }
.deliverables-list > div:nth-child(odd) { border-right:1px solid #aeb4b2; }
.deliverables-list > div:nth-child(even) { padding-left:24px; }
.deliverables-list span { color:#a5793e; font:700 12px Manrope,sans-serif; }
.deliverables-list h3 { margin-top:30px; font-size:18px; letter-spacing:0; }
.deliverables-list p { margin:10px 0 0; color:#62717b; font-size:14px; line-height:1.7; }

.home-scenarios { background:#e4e2dc; }
.scenario-grid { display:grid; grid-template-columns:1fr 1.15fr; gap:72px; }
.home-scenarios .home-section-heading { display:block; margin:0; }
.scenario-list { border-top:1px solid #aeb4b2; }
.scenario-list > div { display:grid; grid-template-columns:55px 1fr; padding:25px 0; border-bottom:1px solid #aeb4b2; }
.scenario-list h3 { font-size:21px; letter-spacing:0; }
.scenario-list p { grid-column:2; margin:8px 0 0; color:#62717b; line-height:1.75; }

.home-contact { padding: 106px 0; background:#d2a463; color:#132331; }
.contact-band { display:grid; grid-template-columns:1fr 1fr; gap:72px; align-items:end; }
.contact-band .home-kicker { color:#132331; opacity:.62; }
.contact-band h2 { font-size:52px; line-height:1.16; letter-spacing:0; }
.contact-band-right { max-width: 520px; justify-self:end; }
.contact-band-right p { margin:0 0 28px; line-height:1.85; color:rgba(19,35,49,.72); }
.contact-band-right .contact-band-details { margin-top:-14px; font-size:13px; line-height:1.9; color:rgba(19,35,49,.58); }
.home-button-gold { background:#132331; color:#fff; }
.home-contact-actions { display:flex; align-items:center; gap:24px; }
.wechat-mini { display:flex; align-items:center; gap:10px; color:rgba(19,35,49,.7); font-size:13px; font-weight:700; }
.wechat-mini img { width:72px; height:72px; object-fit:cover; border:5px solid rgba(255,255,255,.56); }
.home-footer { background:#0d1a26; }

.back-to-top {
  --footer-offset: 0px;
  position:fixed;
  right:clamp(16px, 2vw, 32px);
  bottom:calc(24px + var(--footer-offset));
  z-index:30;
  width:44px;
  height:44px;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:0;
  border:1px solid rgba(255,255,255,.24);
  border-radius:2px;
  background:#132331;
  color:#fff;
  box-shadow:0 10px 28px rgba(7,18,28,.22);
  font:600 22px/1 var(--font-latin);
  letter-spacing:0;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity 180ms ease, visibility 180ms ease, transform 180ms ease, bottom 180ms ease, background-color 180ms ease;
}
.back-to-top:hover, .back-to-top:focus-visible { background:#d2a463; color:#132331; }
.back-to-top:focus-visible { outline:2px solid #fff; outline-offset:3px; }
.back-to-top.is-visible { opacity:1; visibility:visible; transform:translateY(0); }

@media (max-width: 900px) {
  .home-container { width: min(100% - 48px, 1440px); }
  .home-hero h1 { font-size: 58px; }
  .service-index-grid, .process-grid { grid-template-columns:repeat(2,1fr); }
  .service-index-grid a:nth-child(2) { border-right:0; }
  .service-index-grid a:nth-child(-n+2) { border-bottom:1px solid rgba(19,35,49,.2); }
  .home-section-heading, .home-process-intro, .scenario-grid, .contact-band { grid-template-columns:1fr; gap:28px; }
  .deliverables-layout { grid-template-columns:1fr; gap:48px; }
  .home-section-heading > p:last-child { grid-column:1; grid-row:auto; }
  .contact-band-right { justify-self:start; }
}

@media (max-width: 600px) {
  .home-container { width: calc(100% - 32px); }
  .back-to-top { right:16px; bottom:calc(16px + var(--footer-offset)); }
  .home-header .nav { min-height:68px; }
  .home-header .menu { display:none; }
  .home-header .nav-cta { min-height:40px; padding:0 12px; font-size:12px; }
  .home-header .nav, .inner-header .nav { gap:8px; }
  .home-header .menu-toggle, .inner-header .menu-toggle { width:40px; height:40px; font-size:21px; }
  .home-hero { min-height: 720px; }
  .home-hero-datacenter { background-image:url("assets/hero-datacenter-mobile.webp"); background-position:center; }
  .home-hero-content { padding: 120px 0 108px; }
  .home-hero h1 { font-size: 36px; line-height:1.22; }
  .home-hero-lead { font-size:15px; line-height:1.75; }
  .home-hero-bottom { display:none; }
  .home-carousel-controls { right:16px; bottom:24px; }
  .home-hero-actions { gap:18px; flex-wrap:wrap; }
  .home-contact-actions { align-items:flex-start; flex-direction:column; }
  .site-footer { padding:44px 0 20px; }
  .footer-grid { gap:34px; }
  .footer-bottom { gap:10px; }
  .service-index-grid { grid-template-columns:1fr 1fr; }
  .service-index-grid a { min-height:105px; padding:18px 12px; grid-template-columns:32px 1fr; }
  .service-index-grid a:first-child { padding-left:12px; }
  .service-index-grid strong { font-size:14px; }
  .service-index-grid small { font-size:11px; }
  .home-section, .home-process, .home-contact { padding:76px 0; }
  .home-deliverables { padding:76px 0; }
  .home-section-heading { margin-bottom:42px; }
  .home-section-heading h2, .home-process h2, .contact-band h2 { font-size:36px; }
  .deliverables-heading h2 { font-size:36px; }
  .service-row { grid-template-columns:40px 1fr; gap:12px; padding:25px 0; }
  .service-row h3 { font-size:20px; }
  .service-row p { font-size:14px; }
  .service-arrow { display:none; }
  .process-grid { grid-template-columns:1fr 1fr; }
  .process-grid > div { min-height:190px; padding-right:12px; }
  .process-grid > div:not(:first-child) { padding-left:12px; }
  .process-grid h3 { margin-top:36px; font-size:16px; }
  .process-grid p { font-size:13px; }
  .deliverables-list > div { min-height:160px; padding-right:12px; }
  .deliverables-list > div:nth-child(even) { padding-left:12px; }
  .deliverables-list h3 { margin-top:24px; font-size:16px; }
  .scenario-list h3 { font-size:18px; }
  .contact-band-right { max-width:none; }
}

@media (prefers-reduced-motion: reduce) {
  .home-hero-slide { transition:none; transform:none; }
  .back-to-top { transition:none; }
}

/* Shared full-width inner pages */
.inner-page { background:#f2f0eb; color:#132331; }
.inner-header { position:absolute; width:100%; background:rgba(12,24,36,.78); border-bottom:1px solid rgba(255,255,255,.16); color:#fff; }
.inner-header .brand { color:#fff; }
.inner-header .menu { color:rgba(255,255,255,.68); }
.inner-header .menu a:hover, .inner-header .menu .is-current { color:#d2a463; }
.inner-header .nav-cta { border-radius:2px; background:#d2a463; color:#132331; }
.inner-hero { position:relative; min-height:590px; display:flex; align-items:flex-end; background-color:#0b1722; background-position:center; background-size:cover; color:#fff; }
.solution-hero { background-image:url("assets/hero-datacenter.jpg"); background-image:image-set(url("assets/hero-datacenter.webp") type("image/webp"), url("assets/hero-datacenter.jpg") type("image/jpeg")); }
.cases-hero { background-image:url("assets/hero-compute.jpg"); background-image:image-set(url("assets/hero-compute.webp") type("image/webp"), url("assets/hero-compute.jpg") type("image/jpeg")); }
.inner-hero-shade { position:absolute; inset:0; background:linear-gradient(90deg,rgba(7,18,28,.95),rgba(7,18,28,.64) 52%,rgba(7,18,28,.18)),linear-gradient(0deg,rgba(7,18,28,.68),transparent 55%); }
.inner-hero-content { position:relative; z-index:1; padding:150px 0 82px; }
.inner-hero h1 { max-width:900px; font-family:var(--font-sans); font-size:64px; line-height:1.14; letter-spacing:0; }
.inner-hero h1 em { color:#d2a463; font-style:normal; }
.inner-hero-content > p:last-child { max-width:650px; margin:24px 0 0; color:rgba(255,255,255,.72); font-size:17px; line-height:1.85; }
.inner-index { background:#d2a463; }
.inner-index-grid { display:grid; grid-template-columns:repeat(4,1fr); }
.inner-index a { min-height:86px; display:flex; align-items:center; gap:20px; border-right:1px solid rgba(19,35,49,.2); font-weight:700; }
.inner-index a:first-child { padding-left:0; }
.inner-index a:not(:first-child) { padding-left:28px; }
.inner-index a:last-child { border-right:0; }
.inner-index span { font:700 12px Manrope,sans-serif; color:rgba(19,35,49,.56); }
.solution-chapter { padding:108px 0; border-bottom:1px solid #c2c5c2; scroll-margin-top:80px; }
.solution-alt { background:#e4e2dc; }
.solution-layout { display:grid; grid-template-columns:.85fr 1.15fr; gap:96px; }
.solution-title > span, .case-heading > span { color:#a5793e; font:700 12px Manrope,sans-serif; letter-spacing:.14em; }
.solution-title h2, .case-heading h2 { margin-top:22px; font-size:42px; line-height:1.2; letter-spacing:0; }
.solution-title p, .case-heading p { max-width:470px; margin:20px 0 0; color:#62717b; line-height:1.85; }
.solution-details { display:grid; grid-template-columns:1fr 1fr; gap:48px; }
.solution-details h3, .case-content h3 { padding-bottom:15px; border-bottom:1px solid #aeb4b2; font-size:17px; letter-spacing:0; }
.solution-details ul { margin:20px 0 0; padding:0; list-style:none; }
.solution-details li { position:relative; padding:12px 0 12px 20px; border-bottom:1px solid rgba(19,35,49,.1); color:#53626c; line-height:1.65; }
.solution-details li::before { content:""; position:absolute; left:0; top:22px; width:5px; height:5px; background:#a5793e; }
.delivery-boundary { padding:108px 0; background:#132331; color:#fff; }
.boundary-grid { display:grid; grid-template-columns:.85fr 1.15fr; gap:96px; }
.boundary-grid h2 { font-size:42px; line-height:1.2; letter-spacing:0; }
.boundary-list { border-top:1px solid rgba(255,255,255,.25); }
.boundary-list p { display:grid; grid-template-columns:52px 1fr; margin:0; padding:20px 0; border-bottom:1px solid rgba(255,255,255,.18); color:rgba(255,255,255,.76); }
.boundary-list span { color:#d2a463; font:700 12px Manrope,sans-serif; }
.inner-cta { padding:96px 0; background:#d2a463; }
.inner-cta-grid { display:grid; grid-template-columns:1fr 1fr; gap:72px; align-items:end; }
.inner-cta h2 { font-size:40px; line-height:1.2; letter-spacing:0; }
.inner-cta-grid > div { justify-self:end; max-width:500px; }
.inner-cta p { margin:0 0 24px; color:rgba(19,35,49,.68); }
.experience-band { background:#d2a463; }
.experience-grid { min-height:92px; display:grid; grid-template-columns:1.1fr repeat(4,1fr); align-items:center; }
.experience-grid p { margin:0; font-weight:700; }
.experience-grid span { padding-left:24px; border-left:1px solid rgba(19,35,49,.22); color:rgba(19,35,49,.68); }
.scenario-case { padding:108px 0; border-bottom:1px solid #c2c5c2; }
.case-dark { background:#132331; color:#fff; }
.case-muted { background:#e4e2dc; }
.case-layout { display:grid; grid-template-columns:.85fr 1.15fr; gap:96px; }
.case-content { display:grid; grid-template-columns:repeat(3,1fr); gap:30px; }
.case-content p { margin:18px 0 0; color:#62717b; line-height:1.8; }
.case-dark .case-heading p, .case-dark .case-content p { color:rgba(255,255,255,.62); }
.case-dark .case-content h3 { border-color:rgba(255,255,255,.24); }
.about-hero { background-image:url("assets/hero-network.jpg"); background-image:image-set(url("assets/hero-network.webp") type("image/webp"), url("assets/hero-network.jpg") type("image/jpeg")); }
.contact-hero { background-image:url("assets/inner-contact.jpg"); }
.company-intro { padding:120px 0; }
.company-intro-grid, .company-method-grid, .address-grid, .contact-directory-grid, .project-brief-grid { display:grid; grid-template-columns:.85fr 1.15fr; gap:96px; }
.company-intro h2, .focus-heading h2, .company-method h2, .company-address h2, .contact-directory h2, .project-brief h2 { font-size:42px; line-height:1.2; letter-spacing:0; }
.company-statement p { margin:0 0 22px; color:#52616b; font-size:18px; line-height:1.95; }
.company-facts { display:grid; grid-template-columns:repeat(3,1fr); margin:42px 0 0; border-top:1px solid #aeb4b2; }
.company-facts > div { min-width:0; padding:20px 18px 0 0; border-right:1px solid #aeb4b2; }
.company-facts > div:not(:first-child) { padding-left:18px; }
.company-facts > div:last-child { border-right:0; }
.company-facts dt { color:#62717b; font-size:12px; }
.company-facts dd { margin:10px 0 0; color:#132331; font-size:15px; font-weight:700; overflow-wrap:anywhere; }
.company-focus { padding:108px 0; background:#132331; color:#fff; }
.focus-heading { display:flex; align-items:end; justify-content:space-between; margin-bottom:60px; }
.focus-list { display:grid; grid-template-columns:repeat(4,1fr); border-top:1px solid rgba(255,255,255,.25); }
.focus-list > div { min-height:230px; padding:24px 22px 0 0; border-right:1px solid rgba(255,255,255,.18); }
.focus-list > div:not(:first-child) { padding-left:22px; }
.focus-list > div:last-child { border-right:0; }
.focus-list span, .method-list span { color:#d2a463; font:700 12px Manrope,sans-serif; }
.focus-list h3 { margin-top:62px; font-size:21px; letter-spacing:0; }
.focus-list p { margin:12px 0 0; color:rgba(255,255,255,.62); line-height:1.75; }
.company-method { padding:112px 0; background:#e4e2dc; }
.method-list { border-top:1px solid #aeb4b2; }
.method-list > div { display:grid; grid-template-columns:52px 210px 1fr; padding:22px 0; border-bottom:1px solid #aeb4b2; }
.method-list h3 { font-size:17px; letter-spacing:0; }
.method-list p { margin:0; color:#62717b; line-height:1.7; }
.company-address { padding:96px 0; background:#d2a463; }
.address-grid { align-items:end; }
.address-grid > div:last-child { justify-self:end; }
.address-grid p { margin:0 0 22px; color:rgba(19,35,49,.7); line-height:1.8; }
.address-grid a { padding-bottom:7px; border-bottom:1px solid rgba(19,35,49,.42); font-weight:700; }
.contact-directory { padding:88px 0; }
.contact-directory-grid { align-items:start; gap:72px; }
.contact-directory-copy { max-width:470px; margin:24px 0 0; color:#62717b; line-height:1.8; }
.contact-rows { border-top:1px solid #aeb4b2; }
.contact-rows > a, .contact-rows > div { min-height:92px; display:grid; grid-template-columns:160px 1fr 32px; align-items:center; border-bottom:1px solid #aeb4b2; }
.contact-rows span { color:#62717b; }
.contact-rows strong { font-size:20px; font-weight:600; }
.contact-rows b { color:#a5793e; font:22px Manrope,sans-serif; }
.contact-channel-stack { min-width:0; }
.wechat-contact { display:flex; align-items:center; gap:24px; max-width:510px; margin-top:36px; padding:22px; background:#e4e2dc; }
.wechat-contact img { width:132px; height:132px; flex:0 0 auto; object-fit:cover; border:7px solid #fff; }
.wechat-contact span { color:#a5793e; font-size:12px; font-weight:700; }
.wechat-contact strong { display:block; margin-top:10px; font-size:20px; }
.wechat-contact p { margin:10px 0 0; color:#62717b; line-height:1.7; }
.project-brief { padding:108px 0; background:#132331; color:#fff; }
.brief-list { border-top:1px solid rgba(255,255,255,.25); }
.brief-list p { display:grid; grid-template-columns:52px 1fr; margin:0; padding:20px 0; border-bottom:1px solid rgba(255,255,255,.18); color:rgba(255,255,255,.76); }
.brief-list span { color:#d2a463; font:700 12px Manrope,sans-serif; }
.contact-call { background:#d2a463; }
.contact-call-inner { min-height:210px; display:grid; grid-template-columns:.7fr 1.3fr; align-items:center; gap:72px; }
.contact-call-heading p { margin:0 0 12px; color:rgba(19,35,49,.58); font:700 11px/1 var(--font-latin); letter-spacing:.14em; }
.contact-call-heading h2 { font-size:36px; letter-spacing:0; }
.contact-call-numbers { display:grid; grid-template-columns:1fr 1fr; border-top:1px solid rgba(19,35,49,.24); border-bottom:1px solid rgba(19,35,49,.24); }
.contact-call-numbers > div { min-width:0; padding:28px 32px; }
.contact-call-numbers > div:first-child { padding-left:0; border-right:1px solid rgba(19,35,49,.24); }
.contact-call-numbers span { display:block; margin-bottom:13px; color:rgba(19,35,49,.62); font-size:13px; }
.contact-call-numbers strong { display:block; font:700 30px/1 var(--font-latin); white-space:nowrap; }
.checklist-hero { background-image:url("assets/hero-compute.jpg"); background-image:image-set(url("assets/hero-compute.webp") type("image/webp"), url("assets/hero-compute.jpg") type("image/jpeg")); }
.checklist-intro { background:#d2a463; }
.checklist-intro-grid { min-height:92px; display:grid; grid-template-columns:1.1fr repeat(4,1fr); align-items:center; }
.checklist-intro-grid p { margin:0; font-weight:700; }
.checklist-intro-grid span { padding-left:24px; border-left:1px solid rgba(19,35,49,.22); color:rgba(19,35,49,.68); }
.checklist-body { background:#f2f0eb; }
.checklist-section { display:grid; grid-template-columns:.85fr 1.15fr; gap:96px; padding:76px 0; border-bottom:1px solid #aeb4b2; }
.checklist-section > div > span { color:#a5793e; font:700 12px Manrope,sans-serif; letter-spacing:.14em; }
.checklist-section h2 { margin-top:20px; font-size:34px; line-height:1.2; letter-spacing:0; }
.checklist-section ul { display:grid; grid-template-columns:1fr 1fr; gap:0 32px; margin:0; padding:0; list-style:none; }
.checklist-section li { position:relative; min-height:64px; padding:9px 0 12px 28px; border-bottom:1px solid rgba(19,35,49,.12); color:#53626c; line-height:1.65; }
.checklist-section li::before { content:""; position:absolute; left:0; top:14px; width:10px; height:10px; border:1px solid #a5793e; }
.not-found { position:relative; min-height:100vh; display:flex; align-items:center; overflow:hidden; background-color:#0b1722; background-image:url("assets/hero-datacenter.jpg"); background-image:image-set(url("assets/hero-datacenter.webp") type("image/webp"), url("assets/hero-datacenter.jpg") type("image/jpeg")); background-position:center; background-size:cover; background-repeat:no-repeat; color:#fff; }
.not-found-shade { position:absolute; inset:0; background:linear-gradient(90deg,rgba(7,18,28,.96),rgba(7,18,28,.72) 55%,rgba(7,18,28,.32)); }
.not-found-content { position:relative; z-index:1; padding:130px 0 72px; }
.not-found-code { margin:0 0 14px; color:#d2a463; font:700 14px Manrope,sans-serif; letter-spacing:.16em; }
.not-found h1 { font-size:68px; line-height:1.1; letter-spacing:0; }
.not-found-content > p:not(.not-found-code) { max-width:560px; margin:22px 0 0; color:rgba(255,255,255,.7); line-height:1.8; }
.not-found-actions { display:flex; align-items:center; flex-wrap:wrap; gap:26px; margin-top:36px; }

@media (max-width:900px) {
  .inner-hero h1 { font-size:52px; }
  .inner-index-grid { grid-template-columns:repeat(2,1fr); }
  .inner-index a:nth-child(-n+2) { border-bottom:1px solid rgba(19,35,49,.2); }
  .inner-index a:nth-child(2) { border-right:0; }
  .solution-layout, .boundary-grid, .inner-cta-grid, .case-layout { grid-template-columns:1fr; gap:48px; }
  .experience-grid { grid-template-columns:repeat(2,1fr); padding:18px 0; }
  .experience-grid > * { min-height:52px; display:flex; align-items:center; }
  .experience-grid span:nth-child(2) { border-left:0; }
  .inner-cta-grid > div { justify-self:start; }
  .company-intro-grid, .company-method-grid, .address-grid, .contact-directory-grid, .project-brief-grid { grid-template-columns:1fr; gap:48px; }
  .contact-directory-title { display:grid; grid-template-columns:1fr minmax(360px,510px); gap:0 32px; align-items:end; }
  .contact-directory-title .home-kicker, .contact-directory-title h2, .contact-directory-copy { grid-column:1; }
  .contact-directory-title .wechat-contact { grid-column:2; grid-row:1 / 4; margin-top:0; }
  .checklist-intro-grid { grid-template-columns:repeat(2,1fr); padding:18px 0; }
  .checklist-intro-grid > * { min-height:52px; display:flex; align-items:center; }
  .checklist-intro-grid span:nth-child(2) { border-left:0; }
  .checklist-section { grid-template-columns:1fr; gap:36px; }
  .not-found h1 { font-size:52px; }
  .focus-list { grid-template-columns:repeat(2,1fr); }
  .focus-list > div:nth-child(2) { border-right:0; }
  .focus-list > div:nth-child(-n+2) { border-bottom:1px solid rgba(255,255,255,.18); }
  .address-grid > div:last-child { justify-self:start; }
}

@media (max-width:600px) {
  .inner-header .nav { min-height:68px; }
  .inner-header .menu { display:none; }
  .inner-header .nav-cta { display:none; }
  .inner-hero { min-height:540px; }
  .inner-hero-content { padding:120px 0 64px; }
  .inner-hero h1 { font-size:38px; line-height:1.2; }
  .inner-hero-content > p:last-child { font-size:15px; overflow-wrap:anywhere; }
  .inner-index a { min-height:74px; gap:10px; font-size:13px; }
  .inner-index a, .inner-index a:not(:first-child), .inner-index a:first-child { padding-left:12px; }
  .solution-chapter, .delivery-boundary, .scenario-case, .inner-cta { padding:72px 0; }
  .solution-title h2, .case-heading h2, .boundary-grid h2, .inner-cta h2 { font-size:32px; }
  .solution-details { grid-template-columns:1fr; gap:38px; }
  .case-content { grid-template-columns:1fr; gap:34px; }
  .experience-grid { grid-template-columns:1fr 1fr; }
  .experience-grid p { grid-column:1 / 3; border-bottom:1px solid rgba(19,35,49,.2); }
  .experience-grid span { padding-left:12px; font-size:12px; }
  .company-intro, .company-focus, .company-method, .company-address, .contact-directory, .project-brief, .contact-call { padding:72px 0; }
  .contact-directory-title { display:block; }
  .company-intro h2, .focus-heading h2, .company-method h2, .company-address h2, .contact-directory h2, .project-brief h2 { font-size:32px; }
  .company-statement p { font-size:16px; }
  .company-facts { grid-template-columns:1fr; }
  .company-facts > div, .company-facts > div:not(:first-child) { padding:16px 0; border-right:0; border-bottom:1px solid #aeb4b2; }
  .focus-list { grid-template-columns:1fr 1fr; }
  .focus-list > div { min-height:190px; padding:18px 10px 0 0; }
  .focus-list > div:not(:first-child) { padding-left:10px; }
  .focus-list h3 { margin-top:38px; }
  .method-list > div { grid-template-columns:38px 1fr; gap:8px; }
  .method-list p { grid-column:2; margin-top:8px; }
  .contact-rows > a, .contact-rows > div { min-height:96px; grid-template-columns:1fr 28px; padding:16px 0; }
  .contact-rows span { grid-column:1; font-size:12px; }
  .contact-rows strong { grid-column:1; margin-top:6px; font-size:16px; }
  .contact-rows b { grid-column:2; grid-row:1 / 3; }
  .wechat-contact { align-items:flex-start; gap:18px; padding:20px; }
  .wechat-contact img { width:112px; height:112px; border-width:6px; }
  .wechat-contact strong { font-size:17px; }
  .wechat-contact p { font-size:13px; }
  .contact-call-inner { min-height:0; display:block; padding-top:54px; padding-bottom:54px; }
  .contact-call-heading h2 { font-size:30px; }
  .contact-call-numbers { grid-template-columns:1fr; margin-top:30px; }
  .contact-call-numbers > div, .contact-call-numbers > div:first-child { padding:20px 0; border-right:0; }
  .contact-call-numbers > div:first-child { border-bottom:1px solid rgba(19,35,49,.24); }
  .contact-call-numbers strong { font-size:26px; }
  .checklist-intro-grid { grid-template-columns:1fr 1fr; }
  .checklist-intro-grid p { grid-column:1 / 3; border-bottom:1px solid rgba(19,35,49,.2); }
  .checklist-intro-grid span { padding-left:12px; font-size:12px; }
  .checklist-section { padding:58px 0; }
  .checklist-section h2 { font-size:28px; }
  .checklist-section ul { grid-template-columns:1fr; }
  .not-found h1 { font-size:42px; }
  .not-found-actions { align-items:flex-start; flex-direction:column; gap:18px; }
}