:root {
  --ink: #142025;
  --muted: #5d6c72;
  --paper: #f6f8f7;
  --line: #dbe3e1;
  --deep: #071f24;
  --teal: #1d9a8d;
  --teal-dark: #0d756d;
  --amber: #d89a30;
  --clay: #b75f46;
  --white: #ffffff;
  --shadow: 0 22px 60px rgba(15, 34, 38, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.6;
}

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

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

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

.site-header.is-scrolled,
.site-header.is-open,
.site-header-solid {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 28px rgba(12, 27, 31, 0.1);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #09262b;
  background: var(--amber);
  border-radius: 8px;
  font-weight: 800;
  line-height: 1;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.2;
}

.brand strong {
  font-size: 18px;
  letter-spacing: 0;
}

.brand small {
  margin-top: 2px;
  font-size: 12px;
  opacity: 0.78;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.6vw, 34px);
  font-size: 15px;
}

.site-nav a {
  opacity: 0.86;
}

.site-nav a:hover {
  opacity: 1;
}

.site-nav a[aria-current="page"] {
  color: var(--amber);
  opacity: 1;
  font-weight: 800;
}

.nav-cta {
  padding: 9px 16px;
  color: #09262b;
  background: var(--amber);
  border-radius: 8px;
  font-weight: 700;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 1px solid currentColor;
  border-radius: 8px;
  color: inherit;
  background: transparent;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: 82vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  color: var(--white);
  background: var(--deep);
  padding: 128px clamp(20px, 5vw, 72px) 58px;
}

.hero-media {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(3, 20, 24, 0.44), rgba(3, 20, 24, 0.08)), url("assets/hero-network.jpg");
  background-position: center;
  background-size: cover;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(760px, 100%);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--amber);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 7.2vw, 86px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-copy {
  width: min(690px, 100%);
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(17px, 2vw, 22px);
}

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

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 8px;
  font-weight: 800;
}

.button.primary {
  color: #0b2529;
  background: var(--amber);
}

.button.secondary {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.08);
}

.hero-metrics {
  position: absolute;
  right: clamp(20px, 5vw, 72px);
  bottom: 34px;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
  gap: 1px;
  width: min(560px, calc(100% - 40px));
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
}

.hero-metrics div {
  padding: 18px;
  background: rgba(3, 22, 27, 0.34);
}

.hero-metrics strong,
.hero-metrics span {
  display: block;
}

.hero-metrics strong {
  color: var(--amber);
  font-size: 28px;
  line-height: 1.1;
}

.hero-metrics span {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
}

.section {
  padding: clamp(70px, 9vw, 124px) clamp(20px, 5vw, 72px);
}

.section-heading {
  width: min(820px, 100%);
  margin-bottom: 36px;
}

.section-heading.compact {
  margin-bottom: 30px;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.16;
  letter-spacing: 0;
}

.section-heading p:not(.eyebrow),
.split-copy p,
.about-inner > p,
.contact p,
.page-hero p,
.info-panel p {
  color: var(--muted);
  font-size: 17px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  min-height: 234px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 14px 40px rgba(15, 34, 38, 0.06);
}

.service-card h3,
.process-item h3,
.service-card h2 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.28;
}

.service-card p,
.process-item p,
.info-panel p {
  margin-bottom: 0;
  color: var(--muted);
}

.service-icon {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  margin-bottom: 24px;
  color: var(--white);
  background: var(--teal);
  border-radius: 8px;
  font-weight: 900;
}

.service-card:nth-child(2n) .service-icon {
  background: var(--clay);
}

.service-card:nth-child(3n) .service-icon {
  color: #122226;
  background: var(--amber);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 1.1fr);
  gap: clamp(36px, 7vw, 88px);
  background: #eef3f1;
}

.process-list {
  display: grid;
  gap: 14px;
}

.process-item {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 18px;
  min-height: 122px;
  padding: 24px;
  border-left: 4px solid var(--teal);
  background: var(--white);
  border-radius: 8px;
}

.process-item span {
  color: var(--amber);
  font-size: 24px;
  font-weight: 900;
  line-height: 1;
}

.about-band {
  color: var(--white);
  background: var(--deep);
}

.about-inner {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(28px, 6vw, 84px);
  align-items: start;
}

.about-inner > p {
  color: rgba(255, 255, 255, 0.78);
}

.about-facts {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
}

.about-facts div {
  padding: 24px;
  background: rgba(255, 255, 255, 0.08);
}

.about-facts span,
.about-facts strong {
  display: block;
}

.about-facts span {
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.62);
}

.about-facts strong {
  font-size: 22px;
}

.page-hero {
  padding: 148px clamp(20px, 5vw, 72px) clamp(58px, 8vw, 96px);
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(7, 31, 36, 0.92), rgba(7, 31, 36, 0.66)),
    url("assets/hero-network.jpg") center / cover;
}

.page-hero h1 {
  width: min(840px, 100%);
  margin-bottom: 18px;
}

.page-hero p:not(.eyebrow) {
  width: min(760px, 100%);
  color: rgba(255, 255, 255, 0.82);
}

.content-section {
  background: var(--paper);
}

.content-grid,
.contact-grid {
  display: grid;
  gap: 22px;
}

.content-grid.two-col,
.contact-grid {
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
}

.info-panel {
  padding: clamp(24px, 4vw, 34px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 14px 40px rgba(15, 34, 38, 0.06);
}

.info-panel h2 {
  font-size: clamp(26px, 3vw, 36px);
}

.accent-panel {
  border-color: rgba(29, 154, 141, 0.26);
  background: #edf7f5;
}

.plain-list {
  margin: 0;
}

.plain-list div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(20, 32, 37, 0.12);
}

.plain-list div:first-child {
  padding-top: 0;
}

.plain-list div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.plain-list dt {
  color: var(--muted);
  font-size: 14px;
}

.plain-list dd {
  margin: 0;
  font-weight: 800;
  word-break: break-word;
}

.qualification-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: clamp(24px, 4vw, 54px);
  align-items: start;
}

.license-frame {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.license-frame img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.license-info {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.license-info h2 {
  font-size: clamp(26px, 3vw, 36px);
}

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

.license-info dl {
  margin: 0;
}

.license-info div {
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.license-info div:first-child {
  padding-top: 0;
}

.license-info div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.license-info dt {
  color: var(--muted);
  font-size: 13px;
}

.license-info dd {
  margin: 4px 0 0;
  font-size: 18px;
  font-weight: 800;
  word-break: break-word;
}

.contact {
  padding: clamp(70px, 9vw, 118px) clamp(20px, 5vw, 72px);
  color: var(--white);
  background: linear-gradient(135deg, var(--teal-dark), #18333a 58%, #65422c);
}

.contact-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.7fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: end;
}

.contact p {
  color: rgba(255, 255, 255, 0.78);
}

address {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  font-style: normal;
}

address span,
address strong {
  display: block;
}

address span {
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.68);
}

address strong {
  font-size: 22px;
  line-height: 1.45;
}

.address-link {
  display: inline-flex;
  margin-top: 18px;
  color: var(--amber);
  font-weight: 800;
}

.detail-contact {
  margin-top: 0;
}

.section-action {
  margin-top: 28px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  color: var(--teal-dark);
  font-weight: 900;
}

.text-link::after {
  content: "";
  width: 26px;
  height: 2px;
  margin-left: 10px;
  background: currentColor;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(20px, 5vw, 72px);
  color: rgba(255, 255, 255, 0.72);
  background: #071417;
}

.site-footer a {
  color: var(--amber);
  font-weight: 800;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

@media (max-width: 980px) {
  .hero {
    min-height: 78vh;
    padding-bottom: 210px;
  }

  .hero-metrics {
    left: 20px;
    right: 20px;
    grid-template-columns: repeat(3, 1fr);
    width: auto;
  }

  .service-grid,
  .split,
  .about-inner,
  .qualification-layout,
  .contact-inner,
  .content-grid.two-col,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .about-facts {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-header {
    padding: 14px 18px;
  }

  .brand small {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 70px;
    left: 18px;
    right: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    color: var(--ink);
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .site-header.is-open .site-nav {
    display: flex;
  }

  .site-nav a {
    padding: 13px 12px;
  }

  .nav-cta {
    text-align: center;
  }

  .hero {
    min-height: 76vh;
    padding: 112px 20px 232px;
  }

  h1 {
    font-size: clamp(38px, 12vw, 54px);
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
    bottom: 22px;
  }

  .hero-metrics div {
    padding: 12px 16px;
  }

  .hero-metrics strong {
    font-size: 23px;
  }

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

  .section {
    padding: 62px 20px;
  }

  .page-hero {
    padding: 118px 20px 58px;
  }

  .process-item {
    grid-template-columns: 48px 1fr;
    padding: 20px;
  }

  .license-info {
    padding: 22px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .plain-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}