:root {
  --blue-950: #071c36;
  --blue-900: #0b2b56;
  --blue-800: #0f3d75;
  --blue-700: #174f91;
  --orange-500: #f1871d;
  --orange-600: #d96f0f;
  --green-600: #3b7c45;
  --ink: #14243b;
  --muted: #5f6f84;
  --line: #d9e1eb;
  --surface: #f5f8fc;
  --surface-strong: #eef3f8;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(7, 28, 54, 0.16);
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

body.nav-open {
  overflow: hidden;
}

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

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

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

ul,
ol {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.93);
  border-bottom: 1px solid rgba(217, 225, 235, 0.78);
  backdrop-filter: blur(16px);
  transition: box-shadow 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 12px 36px rgba(7, 28, 54, 0.1);
}

.nav-wrap {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  flex: 0 0 auto;
  width: clamp(170px, 19vw, 250px);
}

.brand img {
  width: 100%;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  color: #263c5a;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}

.site-nav a {
  position: relative;
  padding: 27px 0;
}

.site-nav a::after {
  position: absolute;
  left: 0;
  bottom: 20px;
  width: 0;
  height: 2px;
  content: "";
  background: var(--orange-500);
  transition: width 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  color: var(--blue-900);
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.nav-toggle.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 690px;
  display: grid;
  align-items: stretch;
  overflow: hidden;
  color: var(--white);
  background: var(--blue-950);
}

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

.hero-media::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(7, 28, 54, 0.95) 0%, rgba(7, 28, 54, 0.78) 38%, rgba(7, 28, 54, 0.22) 72%),
    linear-gradient(180deg, rgba(7, 28, 54, 0.1), rgba(7, 28, 54, 0.78));
}

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

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 640px) minmax(300px, 390px);
  align-items: end;
  justify-content: space-between;
  gap: 48px;
  padding: 120px 0 86px;
}

.hero-copy {
  max-width: 660px;
}

.hero-kicker,
.eyebrow {
  color: var(--orange-500);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-kicker {
  margin-bottom: 18px;
  color: #ffad4b;
}

.hero h1 {
  max-width: 660px;
  font-size: clamp(36px, 4.3vw, 56px);
  line-height: 1.12;
  font-weight: 850;
}

.hero-lede {
  max-width: 600px;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 18px;
}

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

.btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 6px;
  padding: 12px 20px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.2;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.btn-primary {
  color: var(--blue-950);
  background: var(--orange-500);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #ff9d33;
}

.btn-secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.36);
  background: rgba(255, 255, 255, 0.08);
}

.hero-panel {
  display: grid;
  gap: 1px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.14);
  box-shadow: var(--shadow);
}

.hero-panel div {
  min-height: 92px;
  padding: 20px;
  background: rgba(7, 28, 54, 0.68);
}

.hero-panel span {
  display: block;
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
  font-weight: 700;
}

.hero-panel strong {
  display: block;
  margin-top: 7px;
  color: var(--white);
  font-size: 18px;
  line-height: 1.45;
}

.section {
  padding: 86px 0;
}

.section-tight {
  padding-top: 72px;
}

.section-muted {
  background: var(--surface);
}

.section-blue {
  color: var(--white);
  background:
    linear-gradient(180deg, rgba(11, 43, 86, 0.98), rgba(7, 28, 54, 1)),
    var(--blue-900);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 34px;
}

.heading-grid {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.8fr);
  align-items: end;
  gap: 42px;
}

.section-heading h2,
.application-copy h2,
.contact-copy h2 {
  margin-top: 8px;
  color: var(--ink);
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.18;
  font-weight: 850;
}

.section-blue .section-heading h2 {
  color: var(--white);
}

.section-heading p:not(.eyebrow),
.application-copy p,
.contact-copy p {
  color: var(--muted);
  font-size: 16px;
}

.section-blue .section-heading p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.72);
}

.capability-chain {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: 0 14px 40px rgba(7, 28, 54, 0.08);
}

.capability-chain article {
  min-height: 214px;
  padding: 26px 22px;
  border-right: 1px solid var(--line);
}

.capability-chain article:last-child {
  border-right: 0;
}

.capability-chain span {
  display: inline-flex;
  min-width: 38px;
  min-height: 28px;
  align-items: center;
  justify-content: center;
  color: var(--white);
  background: var(--blue-800);
  border-radius: 4px;
  font-weight: 850;
  line-height: 1;
}

.capability-chain h3 {
  margin-top: 22px;
  color: var(--blue-950);
  font-size: 20px;
}

.capability-chain p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
}

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

.solution-item {
  display: grid;
  grid-template-columns: 86px minmax(260px, 0.9fr) minmax(360px, 1.15fr);
  align-items: center;
  gap: 28px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.075);
}

.solution-index {
  color: var(--orange-500);
  font-size: 46px;
  font-weight: 900;
  line-height: 1;
}

.solution-item.accent-orange .solution-index {
  color: #ffb15c;
}

.solution-item.accent-green .solution-index {
  color: #8fcf8f;
}

.solution-copy h3 {
  color: var(--white);
  font-size: 22px;
  line-height: 1.35;
}

.solution-copy p {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
}

.solution-item ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.solution-item li {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  border-radius: 4px;
  padding: 7px 11px;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.12);
  font-size: 14px;
  font-weight: 700;
}

.application-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.75fr);
  gap: 52px;
  align-items: center;
}

.application-media {
  min-height: 420px;
  overflow: hidden;
  background: var(--surface-strong);
}

.application-media img {
  width: 100%;
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  object-position: center;
}

.application-copy p:not(.eyebrow) {
  margin-top: 16px;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 26px;
}

.scene-grid span {
  min-height: 48px;
  display: flex;
  align-items: center;
  border-left: 3px solid var(--orange-500);
  padding: 10px 14px;
  color: var(--blue-950);
  background: var(--surface);
  font-size: 15px;
  font-weight: 800;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.advantage-grid article {
  min-height: 184px;
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--white);
}

.advantage-grid span {
  display: inline-flex;
  min-width: 44px;
  justify-content: center;
  border-radius: 4px;
  padding: 4px 8px;
  color: var(--blue-900);
  background: #e6edf6;
  font-size: 13px;
  font-weight: 850;
}

.advantage-grid h3 {
  margin-top: 18px;
  color: var(--blue-950);
  font-size: 21px;
}

.advantage-grid p {
  margin-top: 9px;
  color: var(--muted);
  font-size: 15px;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.process-list li {
  position: relative;
  min-height: 188px;
  padding: 26px 22px 24px;
  border-right: 1px solid var(--line);
}

.process-list li:last-child {
  border-right: 0;
}

.process-list span {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  color: var(--white);
  background: var(--orange-500);
  border-radius: 50%;
  font-weight: 900;
}

.process-list strong {
  display: block;
  margin-top: 18px;
  color: var(--blue-950);
  font-size: 20px;
}

.process-list p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 15px;
}

.contact-section {
  padding: 72px 0;
  background:
    linear-gradient(135deg, rgba(11, 43, 86, 0.98), rgba(15, 61, 117, 0.96)),
    var(--blue-900);
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 0.95fr);
  gap: 44px;
  align-items: center;
  color: var(--white);
}

.contact-copy h2 {
  color: var(--white);
}

.contact-copy p:not(.eyebrow) {
  max-width: 520px;
  color: rgba(255, 255, 255, 0.72);
}

.contact-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.contact-cards article {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.contact-cards img {
  width: 110px;
  height: 110px;
  object-fit: contain;
  background: var(--white);
}

.contact-cards span {
  display: block;
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
  font-weight: 700;
}

.contact-cards a {
  display: inline-block;
  margin-top: 6px;
  color: var(--white);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.25;
}

.site-footer {
  color: rgba(255, 255, 255, 0.78);
  background: var(--blue-950);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(240px, 0.76fr) minmax(300px, 0.82fr);
  gap: 56px;
  align-items: start;
  padding: 42px 0 32px;
}

.footer-brand img {
  width: 190px;
  height: auto;
  background: var(--white);
}

.footer-brand p {
  max-width: 390px;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.66);
  font-size: 14px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px 24px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  font-weight: 700;
}

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

.footer-bottom {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: 18px 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
}

.footer-bottom a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (max-width: 1020px) {
  .site-nav {
    gap: 20px;
    font-size: 14px;
  }

  .hero-inner,
  .contact-panel,
  .application-layout,
  .heading-grid {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    align-items: start;
  }

  .hero-panel {
    max-width: 560px;
  }

  .capability-chain,
  .process-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .capability-chain article:nth-child(2n),
  .process-list li:nth-child(2n) {
    border-right: 0;
  }

  .capability-chain article:last-child,
  .process-list li:last-child {
    border-right: 1px solid var(--line);
  }

  .solution-item {
    grid-template-columns: 72px 1fr;
  }

  .solution-item ul {
    grid-column: 2;
  }

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

@media (max-width: 820px) {
  .container {
    width: min(100% - 28px, var(--container));
  }

  .nav-wrap {
    min-height: 68px;
  }

  .brand {
    width: 170px;
  }

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

  .site-nav {
    position: fixed;
    left: 14px;
    right: 14px;
    top: 76px;
    display: grid;
    gap: 0;
    padding: 10px;
    background: var(--white);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 180ms ease, transform 180ms ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 13px 12px;
    border-bottom: 1px solid var(--line);
  }

  .site-nav a:last-child {
    border-bottom: 0;
  }

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

  .hero {
    min-height: 640px;
  }

  .hero-media img {
    object-position: 62% center;
  }

  .hero-media::after {
    background:
      linear-gradient(90deg, rgba(7, 28, 54, 0.98), rgba(7, 28, 54, 0.72)),
      linear-gradient(180deg, rgba(7, 28, 54, 0.2), rgba(7, 28, 54, 0.9));
  }

  .hero-inner {
    gap: 34px;
    padding: 82px 0 54px;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero-lede {
    font-size: 16px;
  }

  .hero-panel div {
    min-height: auto;
    padding: 16px;
  }

  .section,
  .contact-section {
    padding: 62px 0;
  }

  .solution-item,
  .contact-cards,
  .footer-main {
    grid-template-columns: 1fr;
  }

  .solution-item ul {
    grid-column: auto;
  }

  .solution-index {
    font-size: 38px;
  }

  .application-media,
  .application-media img {
    min-height: 320px;
  }

  .contact-cards article {
    grid-template-columns: 96px minmax(0, 1fr);
  }

  .contact-cards img {
    width: 96px;
    height: 96px;
  }

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

@media (max-width: 620px) {
  .brand {
    width: 150px;
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    padding: 70px 0 46px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .capability-chain,
  .process-list,
  .advantage-grid,
  .scene-grid {
    grid-template-columns: 1fr;
  }

  .capability-chain article,
  .capability-chain article:nth-child(2n),
  .capability-chain article:last-child,
  .process-list li,
  .process-list li:nth-child(2n),
  .process-list li:last-child {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .capability-chain article:last-child,
  .process-list li:last-child {
    border-bottom: 0;
  }

  .solution-item {
    gap: 12px;
    padding: 20px;
  }

  .solution-copy h3 {
    font-size: 20px;
  }

  .solution-item li {
    font-size: 13px;
  }

  .application-media,
  .application-media img {
    min-height: 260px;
  }

  .contact-panel {
    gap: 30px;
  }

  .contact-cards article {
    grid-template-columns: 88px minmax(0, 1fr);
    padding: 12px;
  }

  .contact-cards img {
    width: 88px;
    height: 88px;
  }

  .contact-cards a {
    font-size: 18px;
    overflow-wrap: anywhere;
  }

  .footer-brand img {
    width: 170px;
  }
}