:root {
  --ink: #071827;
  --ink-soft: #10263a;
  --panel: #12334b;
  --panel-2: #173f5c;
  --paper: #eef5f9;
  --paper-2: #f7fbfd;
  --line: rgba(255, 255, 255, 0.16);
  --text: #f8fbfd;
  --muted: #b9cfdb;
  --body: #38556a;
  --blue: #1d5d8d;
  --teal: #13a7a6;
  --amber: #f2a922;
  --orange: #e87722;
  --red: #c94134;
  --green: #2e8068;
  --shadow: 0 24px 60px rgba(7, 24, 39, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  text-rendering: geometricPrecision;
}

body.nav-open {
  overflow: hidden;
}

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

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

p,
h1,
h2,
h3,
h4 {
  overflow-wrap: anywhere;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 0 56px;
  color: var(--text);
  background: rgba(7, 24, 39, 0.76);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
  transition: background 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled,
body.nav-open .site-header {
  background: rgba(7, 24, 39, 0.96);
  box-shadow: 0 16px 42px rgba(7, 24, 39, 0.22);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 184px;
}

.brand img {
  width: 218px;
  height: auto;
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.28));
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  padding: 12px 14px;
  color: rgba(248, 251, 253, 0.82);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.25;
  border: 1px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: #fff;
  border-color: rgba(19, 167, 166, 0.48);
  background: rgba(255, 255, 255, 0.06);
  outline: none;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

body.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

body.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

body.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 720px;
  height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: var(--text);
  background: var(--ink);
}

.hero-media,
.hero-media img,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
  opacity: 0.92;
}

.hero-overlay {
  background:
    radial-gradient(circle at 73% 28%, rgba(19, 167, 166, 0.32), transparent 28%),
    linear-gradient(90deg, rgba(7, 24, 39, 0.98) 0%, rgba(7, 24, 39, 0.94) 38%, rgba(7, 24, 39, 0.48) 68%, rgba(7, 24, 39, 0.18) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(720px, calc(100% - 112px));
  margin-left: 56px;
  padding-top: 52px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--teal);
  font-size: 16px;
  font-weight: 900;
  line-height: 1.35;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--amber);
}

.hero h1 {
  margin: 0;
  font-size: 54px;
  line-height: 1.14;
  font-weight: 900;
}

.hero h1 span {
  display: block;
  margin-top: 18px;
  color: #d9e9f2;
  font-size: 34px;
  line-height: 1.18;
}

.hero-lead {
  margin: 34px 0 0;
  max-width: 690px;
  color: #f4fbff;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.5;
}

.hero-lead span {
  display: block;
  margin-top: 12px;
  color: #c6dbe7;
  font-size: 21px;
  font-weight: 600;
}

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

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  font-weight: 900;
  line-height: 1.2;
  border: 2px solid transparent;
}

.button.primary {
  color: var(--ink);
  background: var(--amber);
}

.button.secondary {
  color: var(--text);
  border-color: var(--teal);
  background: rgba(19, 167, 166, 0.12);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  outline: none;
}

.hero-tags {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 14px;
  width: min(560px, 100%);
  margin-top: 64px;
}

.hero-tags span {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  color: #fff;
  font-size: 16px;
  font-weight: 900;
  line-height: 1.25;
  text-align: center;
  background: rgba(18, 51, 75, 0.78);
  border: 2px solid var(--teal);
}

.hero-tags span:nth-child(odd) {
  border-color: var(--amber);
}

.section {
  padding: 92px 7vw;
}

.section-split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 56px;
  align-items: center;
}

.section-heading {
  max-width: 980px;
  margin-bottom: 40px;
}

.section-copy h2,
.section-heading h2,
.proof-copy h2,
.contact-card h2,
.image-band h2 {
  margin: 0;
  color: var(--ink);
  font-size: 40px;
  line-height: 1.22;
  font-weight: 900;
}

.section-heading p:not(.eyebrow),
.section-copy p,
.proof-copy p,
.image-band > div > p:not(.eyebrow) {
  max-width: 840px;
  margin: 22px 0 0;
  color: var(--body);
  font-size: 20px;
  line-height: 1.55;
  font-weight: 600;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.stat-grid article {
  min-height: 146px;
  padding: 24px;
  color: var(--text);
  background: linear-gradient(135deg, var(--panel), var(--panel-2));
  border-left: 7px solid var(--amber);
  box-shadow: var(--shadow);
}

.stat-grid article:nth-child(2),
.stat-grid article:nth-child(4) {
  border-left-color: var(--teal);
}

.stat-grid strong {
  display: block;
  color: #fff;
  font-size: 28px;
  line-height: 1.18;
  font-weight: 900;
}

.stat-grid span {
  display: block;
  margin-top: 16px;
  color: #cfe1eb;
  font-size: 18px;
  line-height: 1.35;
  font-weight: 700;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.service-card {
  min-height: 280px;
  padding: 28px;
  background: #fff;
  border-top: 6px solid var(--amber);
  box-shadow: var(--shadow);
}

.service-card:nth-child(2n) {
  border-top-color: var(--teal);
}

.service-card:nth-child(3n) {
  border-top-color: var(--blue);
}

.service-card span {
  display: inline-flex;
  color: var(--blue);
  font-size: 18px;
  font-weight: 900;
}

.service-card h3,
.service-card h4,
.service-card p {
  margin: 0;
}

.service-card h3 {
  margin-top: 20px;
  color: var(--ink);
  font-size: 25px;
  line-height: 1.22;
  font-weight: 900;
}

.service-card h4 {
  margin-top: 10px;
  color: var(--blue);
  font-size: 22px;
  line-height: 1.25;
  font-weight: 900;
}

.service-card p {
  margin-top: 18px;
  color: var(--body);
  font-size: 17px;
  line-height: 1.48;
  font-weight: 600;
}

.section-dark {
  color: var(--text);
  background:
    linear-gradient(135deg, rgba(19, 167, 166, 0.13), transparent 46%),
    var(--ink);
}

.section-dark .section-heading h2 {
  color: #fff;
}

.org-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
}

.org-grid article {
  min-height: 230px;
  padding: 24px;
  background: rgba(18, 51, 75, 0.92);
  border-top: 5px solid var(--teal);
}

.org-grid article:nth-child(2n) {
  border-top-color: var(--amber);
}

.org-grid span,
.org-grid strong {
  display: block;
}

.org-grid span {
  color: #fff;
  font-size: 23px;
  line-height: 1.28;
  font-weight: 900;
}

.org-grid strong {
  margin-top: 12px;
  color: #d9e9f2;
  font-size: 18px;
  line-height: 1.25;
}

.org-grid p {
  margin: 22px 0 0;
  color: #c3d7e2;
  font-size: 17px;
  line-height: 1.45;
  font-weight: 600;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 12px;
}

.timeline article {
  min-height: 138px;
  padding: 20px 14px;
  background: #fff;
  border-top: 5px solid var(--teal);
}

.timeline article:nth-child(odd) {
  border-top-color: var(--blue);
}

.timeline strong,
.timeline span {
  display: block;
}

.timeline strong {
  color: var(--blue);
  font-size: 24px;
  line-height: 1;
}

.timeline span {
  margin-top: 18px;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.28;
  font-weight: 850;
}

.section-proof {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 52px;
  align-items: center;
  color: var(--text);
  background: var(--ink);
}

.section-proof .eyebrow {
  color: #ff685b;
}

.section-proof h2,
.section-proof p {
  color: #fff;
}

.section-proof p {
  color: #c9dce6;
}

.dg-classes {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.dg-classes span {
  min-width: 96px;
  padding: 12px 14px;
  color: #fff;
  font-size: 17px;
  font-weight: 900;
  line-height: 1.2;
  text-align: center;
  background: rgba(18, 51, 75, 0.92);
  border-left: 5px solid var(--red);
}

.proof-media {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

figure {
  margin: 0;
}

.proof-media figure,
.image-band-grid figure,
.route-map,
.project-card {
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}

.proof-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

figcaption {
  min-height: 58px;
  display: flex;
  align-items: center;
  padding: 14px 18px;
  color: #fff;
  background: rgba(7, 24, 39, 0.94);
  font-size: 16px;
  font-weight: 850;
  line-height: 1.25;
}

.project-section {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.project-card {
  display: flex;
  flex-direction: column;
  min-height: 390px;
  background: #fff;
}

.project-card.wide {
  grid-column: span 2;
}

.project-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.project-card div {
  padding: 22px 24px 24px;
}

.project-card h3,
.project-card p {
  margin: 0;
}

.project-card h3 {
  color: var(--ink);
  font-size: 24px;
  line-height: 1.22;
  font-weight: 900;
}

.project-card p {
  margin-top: 12px;
  color: var(--body);
  font-size: 17px;
  line-height: 1.45;
  font-weight: 650;
}

.image-band {
  background: #fff;
}

.image-band-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 34px;
}

.image-band-grid img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.routes-section {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(0, 1.1fr);
  gap: 48px;
  align-items: center;
  color: var(--text);
  background:
    linear-gradient(135deg, rgba(29, 93, 141, 0.38), transparent 44%),
    var(--ink);
}

.routes-section .section-copy h2 {
  color: #fff;
}

.routes-section .section-copy p:not(.eyebrow) {
  color: #c9dce6;
}

.route-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.route-list span {
  padding: 10px 12px;
  color: #fff;
  font-size: 15px;
  font-weight: 900;
  line-height: 1.2;
  border: 1px solid rgba(19, 167, 166, 0.55);
  background: rgba(18, 51, 75, 0.72);
}

.route-map {
  padding: 18px;
  background: rgba(18, 51, 75, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.route-map img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
}

.contact-section {
  background:
    linear-gradient(135deg, rgba(242, 169, 34, 0.16), transparent 38%),
    var(--paper);
}

.contact-card {
  max-width: 1180px;
  margin: 0 auto;
  padding: 50px;
  color: var(--text);
  background: var(--ink);
  box-shadow: var(--shadow);
}

.contact-card h2 {
  color: #fff;
}

.contact-lead {
  margin: 10px 0 0;
  color: #d6e8f1;
  font-size: 24px;
  line-height: 1.3;
  font-weight: 800;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
  gap: 24px;
  margin-top: 36px;
}

.contact-grid div {
  padding: 24px;
  background: rgba(18, 51, 75, 0.86);
  border-left: 6px solid var(--teal);
}

.contact-grid div:nth-child(2) {
  border-left-color: var(--amber);
}

.contact-grid div:nth-child(3) {
  border-left-color: var(--blue);
}

.contact-grid h3,
.contact-grid p {
  margin: 0;
}

.contact-grid h3 {
  color: #fff;
  font-size: 22px;
  line-height: 1.2;
}

.contact-grid p {
  margin-top: 14px;
  color: #d6e8f1;
  font-size: 16px;
  line-height: 1.48;
  font-weight: 650;
}

.contact-grid a {
  color: #fff;
  font-weight: 900;
  border-bottom: 1px solid rgba(242, 169, 34, 0.55);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 56px;
  color: #c9dce6;
  background: #04111c;
}

.site-footer img {
  width: 168px;
  height: auto;
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.26));
}

.site-footer p {
  margin: 0;
  font-size: 14px;
  line-height: 1.4;
  text-align: right;
}

@media (max-width: 1180px) {
  .site-header {
    padding: 0 30px;
  }

  .site-nav a {
    padding-inline: 9px;
    font-size: 13px;
  }

  .hero-content {
    width: min(680px, calc(100% - 60px));
    margin-left: 30px;
  }

  .section {
    padding: 76px 5vw;
  }

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

  .org-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (max-width: 860px) {
  .site-header {
    height: 72px;
    padding: 0 18px;
  }

  .brand {
    min-width: auto;
  }

  .brand img {
    width: 168px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    max-height: calc(100vh - 72px);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 14px 18px 24px;
    overflow-y: auto;
    background: rgba(7, 24, 39, 0.98);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  body.nav-open .site-nav {
    display: flex;
  }

  .site-nav a {
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .hero {
    min-height: 800px;
    height: auto;
    align-items: flex-start;
    padding-top: 112px;
    padding-bottom: 54px;
  }

  .hero-media img {
    object-position: 58% center;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(7, 24, 39, 0.98) 0%, rgba(7, 24, 39, 0.9) 48%, rgba(7, 24, 39, 0.58) 100%);
  }

  .hero-content {
    width: calc(100% - 36px);
    margin-inline: 18px;
    padding-top: 0;
  }

  .hero h1 {
    font-size: 38px;
  }

  .hero h1 span {
    font-size: 26px;
  }

  .hero-lead,
  .hero-lead span {
    font-size: 19px;
  }

  .hero-tags {
    grid-template-columns: 1fr;
    margin-top: 42px;
  }

  .section {
    padding: 56px 18px;
  }

  .section-split,
  .section-proof,
  .routes-section,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .section-copy h2,
  .section-heading h2,
  .proof-copy h2,
  .contact-card h2,
  .image-band h2 {
    font-size: 31px;
  }

  .section-heading p:not(.eyebrow),
  .section-copy p,
  .proof-copy p,
  .image-band > div > p:not(.eyebrow) {
    font-size: 18px;
  }

  .stat-grid,
  .service-grid,
  .org-grid,
  .timeline,
  .proof-media,
  .project-grid,
  .image-band-grid {
    grid-template-columns: 1fr;
  }

  .project-card.wide {
    grid-column: auto;
  }

  .routes-section {
    gap: 30px;
  }

  .contact-card {
    padding: 30px 20px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    padding: 26px 18px;
  }

  .site-footer p {
    text-align: left;
  }
}

@media (max-width: 460px) {
  .hero h1 {
    font-size: 33px;
  }

  .hero h1 span {
    font-size: 23px;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

  .service-card,
  .stat-grid article,
  .org-grid article {
    padding: 22px;
  }

  .timeline article {
    min-height: auto;
  }
}