:root {
  --ink: #15212f;
  --muted: #5d6878;
  --line: #dce3e8;
  --paper: #f6f8f7;
  --white: #ffffff;
  --navy: #123047;
  --teal: #0f8f8b;
  --green: #2d8b57;
  --amber: #d8871e;
  --red: #b94e48;
  --shadow: 0 18px 45px rgba(18, 48, 71, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.65;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

.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, 4vw, 64px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(220, 227, 232, 0.86);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 182px;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--white);
  background: linear-gradient(135deg, var(--teal), var(--navy));
  border-radius: 8px;
  font-size: 24px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

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

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

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

.site-nav a {
  border-radius: 8px;
  color: #314052;
  font-size: 15px;
  padding: 8px 13px;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--navy);
  background: #e9f2f0;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
}

.hero {
  position: relative;
  min-height: calc(100vh - 118px);
  display: grid;
  align-items: center;
  overflow: hidden;
  background: var(--navy);
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(18, 48, 71, 0.92) 0%, rgba(18, 48, 71, 0.72) 39%, rgba(18, 48, 71, 0.12) 76%),
    linear-gradient(0deg, rgba(18, 48, 71, 0.36), rgba(18, 48, 71, 0.06));
}

.hero-content {
  position: relative;
  width: min(720px, 100%);
  padding: 72px clamp(20px, 6vw, 86px);
  color: var(--white);
}

.eyebrow {
  margin: 0 0 12px;
  color: #91e7d6;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

.eyebrow.dark {
  color: var(--teal);
}

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

h1 {
  max-width: 760px;
  margin-bottom: 20px;
  font-size: clamp(38px, 6.2vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
  line-height: 1.25;
}

.hero-copy {
  max-width: 620px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 18px;
}

.hero-actions,
.form-actions,
.quick-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  padding: 10px 18px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn.primary {
  color: var(--white);
  background: var(--green);
  box-shadow: 0 10px 22px rgba(45, 139, 87, 0.24);
}

.btn.primary:hover {
  background: #257848;
}

.btn.secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.44);
  background: rgba(255, 255, 255, 0.11);
}

.btn.secondary.on-light,
.btn.inline {
  color: var(--navy);
  border-color: var(--line);
  background: var(--white);
}

.btn.inline {
  margin-top: 12px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 620px;
  margin: 42px 0 0;
}

.hero-stats div,
.fact-panel div {
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.12);
}

.hero-stats dt,
.fact-panel dd {
  font-size: 26px;
  font-weight: 800;
}

.hero-stats dd,
.hero-stats dt,
.fact-panel dt,
.fact-panel dd {
  margin: 0;
}

.hero-stats dd {
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
}

.section {
  padding: 82px clamp(20px, 5vw, 72px);
}

.intro-grid,
.route-detail,
.contact-layout,
.page-hero.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: start;
}

.intro-grid > div:first-child p:not(.eyebrow),
.route-band p,
.page-hero p,
.route-detail p,
.cta-panel p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
}

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

.feature-list article {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 6px 16px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 10px 25px rgba(18, 48, 71, 0.06);
}

.feature-list span {
  grid-row: span 2;
  color: var(--amber);
  font-weight: 800;
}

.feature-list p,
.card p,
.service-list p,
.review-card span,
.timeline span {
  color: var(--muted);
}

.route-band,
.testimonial-strip,
.cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  background: var(--white);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.route-band > div,
.testimonial-strip > div,
.cta-panel {
  max-width: 790px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 30px;
}

.cards {
  display: grid;
  gap: 18px;
}

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

.card,
.review-card,
.contact-panel,
.feedback-form {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.card {
  padding: 28px;
}

.card a {
  display: inline-flex;
  margin-top: 8px;
  color: var(--teal);
  font-weight: 800;
}

.testimonial-strip blockquote {
  max-width: 520px;
  margin: 0;
  color: var(--navy);
  font-size: 20px;
  font-weight: 700;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 34px clamp(20px, 5vw, 72px);
  color: rgba(255, 255, 255, 0.82);
  background: var(--navy);
}

.site-footer strong {
  color: var(--white);
  font-size: 18px;
}

.site-footer p {
  margin: 3px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-end;
}

.footer-links a,
.text-button {
  color: var(--white);
}

.text-button {
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.page-hero {
  padding: 86px clamp(20px, 6vw, 86px) 62px;
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(18, 48, 71, 0.96), rgba(15, 143, 139, 0.82)),
    var(--navy);
}

.page-hero h1 {
  font-size: clamp(36px, 5vw, 58px);
}

.page-hero p {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.86);
}

.fact-panel {
  display: grid;
  gap: 14px;
  margin: 0;
}

.fact-panel div {
  border-color: rgba(255, 255, 255, 0.22);
}

.fact-panel dt {
  color: rgba(255, 255, 255, 0.72);
}

.fact-panel dd {
  color: var(--white);
}

.route-map {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto;
  align-items: center;
  gap: 12px;
  min-height: 180px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.route-map span {
  display: grid;
  min-width: 76px;
  height: 76px;
  place-items: center;
  color: var(--white);
  background: var(--teal);
  border-radius: 50%;
  font-weight: 800;
}

.route-map i {
  height: 4px;
  background: repeating-linear-gradient(90deg, var(--amber), var(--amber) 16px, transparent 16px, transparent 25px);
}

.route-map strong {
  min-width: 118px;
  text-align: center;
  color: var(--navy);
}

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

.service-list article {
  min-height: 228px;
  padding: 30px;
  border-left: 5px solid var(--teal);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 13px 30px rgba(18, 48, 71, 0.08);
}

.values {
  background: var(--white);
}

.timeline {
  background: #edf4f2;
}

.timeline ol {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  list-style: none;
  margin: 28px 0;
  padding: 0;
}

.timeline li {
  border-top: 4px solid var(--amber);
  border-radius: 8px;
  padding: 18px;
  background: var(--white);
}

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

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

.review-card {
  padding: 30px;
}

.review-card p {
  font-size: 18px;
}

.review-card strong,
.review-card span {
  display: block;
}

.review-card strong {
  color: var(--navy);
}

.contact-panel,
.feedback-form {
  padding: 30px;
}

.contact-line {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: #f9fbfb;
  text-align: left;
}

button.contact-line {
  cursor: pointer;
}

.contact-line span {
  color: var(--muted);
}

.contact-line strong {
  overflow-wrap: anywhere;
}

.feedback-form {
  scroll-margin-top: 110px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

label {
  display: grid;
  gap: 7px;
  color: #314052;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: var(--white);
  padding: 12px 13px;
}

textarea {
  margin-top: 16px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  outline: 3px solid rgba(15, 143, 139, 0.17);
  border-color: var(--teal);
}

.form-note {
  margin: 16px 0 0;
  color: var(--muted);
}

.form-note.success {
  color: var(--green);
  font-weight: 700;
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

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

  .hero {
    min-height: auto;
  }

  .hero-content {
    padding-top: 62px;
    padding-bottom: 50px;
  }

  .hero-overlay {
    background: linear-gradient(90deg, rgba(18, 48, 71, 0.94), rgba(18, 48, 71, 0.58));
  }

  .intro-grid,
  .route-detail,
  .contact-layout,
  .page-hero.split,
  .cards.three,
  .service-list,
  .review-grid,
  .timeline ol {
    grid-template-columns: 1fr;
  }

  .route-band,
  .testimonial-strip,
  .cta-panel,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

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

@media (max-width: 620px) {
  .site-header {
    min-height: 68px;
    padding: 12px 16px;
  }

  .brand {
    min-width: 0;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
  }

  .form-grid,
  .route-map {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-top: 28px;
  }

  .hero-stats div {
    padding: 10px 8px;
  }

  .hero-stats dt {
    font-size: 19px;
  }

  .hero-stats dd {
    font-size: 11px;
  }

  .route-map i {
    width: 4px;
    min-height: 38px;
    justify-self: center;
    background: repeating-linear-gradient(180deg, var(--amber), var(--amber) 16px, transparent 16px, transparent 25px);
  }

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 28px;
  }

  .section {
    padding: 58px 18px;
  }

  .page-hero {
    padding: 66px 18px 50px;
  }

  .contact-line {
    align-items: flex-start;
    flex-direction: column;
  }
}