:root {
  --ink: #17242b;
  --muted: #667780;
  --line: #dce5e8;
  --paper: #f6f8f7;
  --white: #ffffff;
  --blue: #0f6f8f;
  --blue-dark: #094b62;
  --green: #4f9a63;
  --soft: #eaf1ef;
  --shadow: 0 18px 48px rgba(18, 43, 52, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}

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

img {
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 14px clamp(18px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(220, 229, 232, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 280px;
}

.brand img {
  width: 46px;
  height: 46px;
  object-fit: cover;
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 4px 14px rgba(23, 36, 43, 0.08);
}

.brand span {
  display: grid;
  gap: 1px;
}

.brand strong {
  font-size: 16px;
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 34px);
  color: #33474f;
  font-size: 14px;
  white-space: nowrap;
}

.main-nav a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover {
  color: var(--blue);
  border-color: var(--blue);
}

.hero {
  position: relative;
  min-height: calc(100vh - 76px);
  display: grid;
  align-items: center;
  overflow: hidden;
  color: var(--white);
  background: var(--blue-dark);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 39, 50, 0.84), rgba(7, 39, 50, 0.44) 48%, rgba(7, 39, 50, 0.18)),
    url("assets/interior-hero.png") center / cover;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 880px;
  padding: clamp(70px, 10vw, 128px) clamp(20px, 6vw, 86px);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

.hero .eyebrow {
  color: #9fe2b0;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.12;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.35;
}

.hero-copy {
  max-width: 760px;
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 22px;
  border-radius: 6px;
  font-weight: 700;
}

.primary-button {
  color: var(--white);
  background: var(--blue);
}

.secondary-button {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.58);
}

.stats-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.stats-band div {
  padding: 26px clamp(18px, 4vw, 42px);
  background: var(--white);
}

.stats-band strong {
  display: block;
  color: var(--blue);
  font-size: 30px;
  line-height: 1.15;
}

.stats-band span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: clamp(54px, 8vw, 96px) clamp(20px, 6vw, 86px);
}

.section-heading {
  display: grid;
  grid-template-columns: 180px minmax(0, 820px);
  gap: clamp(24px, 6vw, 80px);
  margin-bottom: 34px;
}

.about-section {
  display: grid;
  grid-template-columns: 180px minmax(0, 900px);
  gap: clamp(24px, 6vw, 80px);
  background: var(--white);
}

.about-section .section-heading {
  display: block;
  margin-bottom: 0;
}

.about-content {
  color: #43535a;
  font-size: 18px;
}

.about-content p:last-child {
  margin-bottom: 0;
}

.honor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.honor-list span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 7px 12px;
  color: var(--blue-dark);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
}

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

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.service-grid article {
  min-height: 250px;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 28px rgba(18, 43, 52, 0.05);
}

.service-grid span {
  display: inline-block;
  margin-bottom: 38px;
  color: var(--green);
  font-weight: 800;
}

.service-grid p,
.strength-card p,
.contact-copy p {
  margin-bottom: 0;
  color: var(--muted);
}

.strength-section {
  background: var(--soft);
}

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

.strength-card {
  padding: 28px;
  background: var(--white);
  border-left: 4px solid var(--blue);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.cases-section {
  background: var(--white);
}

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

.case-card {
  padding: 26px;
  background: #f7faf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

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

.case-card h3 {
  color: var(--blue-dark);
}

.case-card ul {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  color: #43535a;
  list-style: none;
}

.case-card li {
  position: relative;
  padding-left: 16px;
  overflow-wrap: anywhere;
}

.case-card li::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  content: "";
  background: var(--green);
  border-radius: 50%;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(360px, 1fr);
  gap: clamp(28px, 6vw, 80px);
  color: var(--white);
  background: #123542;
}

.contact-section .eyebrow {
  color: #9fe2b0;
}

.contact-copy h2 {
  max-width: 680px;
  margin-bottom: 18px;
}

.contact-list {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
}

.contact-list div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 18px;
  padding: 18px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

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

.contact-list span {
  color: rgba(255, 255, 255, 0.62);
}

.contact-list strong {
  font-weight: 700;
  overflow-wrap: anywhere;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 22px clamp(20px, 6vw, 86px);
  color: var(--muted);
  background: var(--white);
  border-top: 1px solid var(--line);
  font-size: 13px;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .main-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .stats-band,
  .service-grid,
  .strength-layout,
  .case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .section-heading,
  .about-section,
  .contact-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    min-height: 66px;
    padding: 10px 16px;
  }

  .brand {
    min-width: 0;
    gap: 10px;
  }

  .brand img {
    width: 40px;
    height: 40px;
  }

  .brand strong {
    font-size: 14px;
  }

  .brand small {
    display: none;
  }

  .main-nav {
    gap: 18px;
    margin-right: -16px;
    padding-right: 16px;
    font-size: 13px;
  }

  .hero {
    min-height: 560px;
  }

  .hero-bg {
    background:
      linear-gradient(180deg, rgba(7, 39, 50, 0.85), rgba(7, 39, 50, 0.5)),
      url("assets/interior-hero.png") center / cover;
  }

  .hero-inner {
    padding: 58px 20px 64px;
  }

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 27px;
  }

  h3 {
    font-size: 20px;
  }

  .hero-copy,
  .about-content {
    font-size: 16px;
  }

  .section {
    padding: 46px 20px;
  }

  .section-heading {
    gap: 10px;
    margin-bottom: 24px;
  }

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

  .stats-band div {
    padding: 18px 20px;
  }

  .stats-band strong {
    font-size: 25px;
  }

  .service-grid,
  .strength-layout,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .service-grid article {
    padding: 22px;
    min-height: auto;
  }

  .service-grid span {
    margin-bottom: 18px;
  }

  .strength-card,
  .case-card {
    padding: 22px;
  }

  .case-card ul {
    gap: 8px;
  }

  .case-card-wide {
    grid-column: span 1;
  }

  .contact-copy h2 {
    margin-bottom: 12px;
  }

  .contact-list div {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 16px;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .stats-band {
    grid-template-columns: 1fr 1fr;
  }
}