:root {
  --ink: #16202a;
  --muted: #66717d;
  --line: #d8e0e8;
  --paper: #f7f8f5;
  --white: #ffffff;
  --safety: #f5b31f;
  --steel: #36556d;
  --green: #2f6f5e;
  --red: #b84a3d;
  --shadow: 0 18px 48px rgba(22, 32, 42, 0.16);
  font-family:
    "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.65;
}

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

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

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 5vw, 64px);
  color: var(--white);
  transition:
    background 0.2s ease,
    box-shadow 0.2s ease,
    color 0.2s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 30px rgba(22, 32, 42, 0.1);
  color: var(--ink);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 180px;
}

.brand-mark {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.78);
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

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

.brand small {
  color: currentColor;
  font-size: 12px;
  opacity: 0.72;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 4vw, 36px);
  font-weight: 700;
}

.nav a {
  position: relative;
}

.nav a::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 2px;
  background: var(--safety);
  content: "";
  opacity: 0;
  transform: scaleX(0.3);
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
}

.nav a:hover::after,
.nav a.is-active::after {
  opacity: 1;
  transform: scaleX(1);
}

.header-call {
  border: 1px solid currentColor;
  border-radius: 6px;
  padding: 9px 14px;
  font-weight: 800;
}

.hero {
  position: relative;
  min-height: 94svh;
  overflow: hidden;
  color: var(--white);
}

.hero-bg,
.hero-overlay,
.hero-crane-lineup {
  position: absolute;
  inset: 0;
}

.hero-bg {
  background:
    radial-gradient(circle at 78% 26%, rgba(245, 179, 31, 0.34), transparent 26%),
    linear-gradient(135deg, #1c2a34 0%, #253848 42%, #111a22 100%);
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(9, 15, 20, 0.88), rgba(9, 15, 20, 0.52) 48%, rgba(9, 15, 20, 0.22)),
    linear-gradient(0deg, rgba(9, 15, 20, 0.78), transparent 48%);
}

.hero-crane-lineup {
  z-index: 1;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  gap: clamp(6px, 1vw, 18px);
  padding: 0 clamp(14px, 6vw, 86px) clamp(58px, 8vw, 92px) 36%;
  pointer-events: none;
}

.crane {
  width: 30%;
  max-height: 74svh;
  object-fit: contain;
  object-position: bottom center;
  filter: drop-shadow(0 28px 34px rgba(0, 0, 0, 0.34));
}

.crane-small {
  width: 24%;
}

.crane-medium {
  width: 31%;
}

.crane-large {
  width: 39%;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  min-height: 94svh;
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: 128px 0 58px;
  flex-direction: column;
  justify-content: flex-end;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--safety);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 18px;
  font-size: clamp(46px, 9vw, 108px);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 680px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(17px, 2.2vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 42px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 6px;
  padding: 12px 20px;
  cursor: pointer;
  font-weight: 900;
}

.button.primary {
  background: var(--safety);
  color: #141414;
}

.button.ghost {
  border: 1px solid rgba(255, 255, 255, 0.64);
  color: var(--white);
}

.hero-stats {
  display: grid;
  max-width: 680px;
  margin: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.28);
}

.hero-stats div {
  padding: 18px 20px 0 0;
}

.hero-stats dt {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 900;
  line-height: 1;
}

.hero-stats dd {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.72);
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--ink);
  color: var(--white);
}

.trust-strip div {
  min-height: 82px;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
  padding: 26px clamp(16px, 4vw, 44px);
  font-weight: 900;
}

.section {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(70px, 10vw, 112px) 0;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.7fr);
  gap: 28px;
  align-items: end;
  margin-bottom: 34px;
}

.section-heading.compact {
  display: block;
  max-width: 720px;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-heading p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

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

.fleet-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 8px 26px rgba(22, 32, 42, 0.08);
}

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

.fleet-card div {
  padding: 22px;
}

.fleet-card h3,
.case-grid h3,
.service-panel h3 {
  margin-bottom: 10px;
  font-size: 22px;
  line-height: 1.25;
}

.fleet-card p {
  color: var(--muted);
}

.fleet-card span {
  color: var(--green);
  font-weight: 900;
}

.service-section {
  width: 100%;
  background: var(--steel);
  color: var(--white);
}

.service-section > * {
  width: min(1120px, calc(100% - 36px));
  margin-right: auto;
  margin-left: auto;
}

.service-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.48fr);
  gap: 28px;
  align-items: start;
}

.process-list {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  list-style: none;
}

.process-list li,
.service-panel,
.case-grid article,
.quote-form {
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
}

.process-list li {
  min-height: 156px;
  padding: 24px;
  border-left: 5px solid var(--safety);
}

.process-list strong,
.process-list span {
  display: block;
}

.process-list strong {
  margin-bottom: 10px;
  font-size: 21px;
}

.process-list span,
.service-panel li,
.case-grid p,
.quote-copy p {
  color: var(--muted);
}

.service-panel {
  padding: 26px;
  box-shadow: var(--shadow);
}

.service-panel ul {
  display: grid;
  margin: 0;
  padding-left: 20px;
  gap: 12px;
}

.case-grid article {
  min-height: 220px;
  padding: 26px;
  border: 1px solid var(--line);
}

.case-grid span {
  display: inline-flex;
  width: 42px;
  height: 42px;
  margin-bottom: 24px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--red);
  color: var(--white);
  font-weight: 900;
}

.quote-section {
  display: grid;
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(70px, 10vw, 112px) 0;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 0.65fr);
  gap: clamp(24px, 6vw, 72px);
  align-items: start;
}

.contact-block {
  display: grid;
  gap: 10px;
  margin-top: 28px;
  font-weight: 900;
}

.quote-form {
  display: grid;
  gap: 16px;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.quote-form label,
.quote-form span {
  display: grid;
  gap: 8px;
}

.quote-form span {
  color: var(--ink);
  font-weight: 900;
}

.quote-form input,
.quote-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 14px;
  color: var(--ink);
  outline: 0;
}

.quote-form textarea {
  min-height: 132px;
  resize: vertical;
}

.quote-form input:focus,
.quote-form textarea:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(47, 111, 94, 0.14);
}

.form-result {
  min-height: 24px;
  margin: 0;
  color: var(--green);
  font-weight: 800;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(18px, 5vw, 64px) 88px;
  background: var(--ink);
  color: var(--white);
}

.site-footer p {
  margin: 0;
}

.mobile-cta {
  position: fixed;
  z-index: 30;
  right: 12px;
  bottom: 12px;
  left: 12px;
  display: none;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.mobile-cta a {
  flex: 1;
  padding: 14px;
  text-align: center;
  font-weight: 900;
}

.mobile-cta a:first-child {
  background: var(--ink);
  color: var(--white);
}

.mobile-cta a:last-child {
  background: var(--safety);
  color: #141414;
}

@media (max-width: 860px) {
  .site-header {
    padding: 12px 18px;
  }

  .nav {
    display: none;
  }

  .header-call {
    display: none;
  }

  .hero {
    min-height: 100svh;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(9, 15, 20, 0.82), rgba(9, 15, 20, 0.5) 42%, rgba(9, 15, 20, 0.82)),
      linear-gradient(90deg, rgba(9, 15, 20, 0.82), rgba(9, 15, 20, 0.42));
  }

  .hero-crane-lineup {
    align-items: flex-end;
    justify-content: center;
    gap: 0;
    padding: 0 0 76px 0;
    opacity: 0.86;
  }

  .crane-small {
    width: 30%;
    transform: translateX(18%);
  }

  .crane-medium {
    width: 38%;
  }

  .crane-large {
    width: 48%;
    transform: translateX(-14%);
  }

  .hero-content {
    min-height: 100svh;
    padding-top: 88px;
    padding-bottom: 94px;
    justify-content: flex-start;
  }

  .eyebrow {
    margin-top: 4px;
    margin-bottom: 10px;
    font-size: 12px;
  }

  h1 {
    max-width: 370px;
    margin-bottom: 14px;
    font-size: clamp(40px, 11.5vw, 52px);
    line-height: 1.03;
  }

  .hero-copy {
    max-width: 370px;
    margin-bottom: 24px;
    font-size: 16px;
    line-height: 1.5;
  }

  .hero-actions {
    gap: 12px;
    margin-bottom: 38px;
  }

  .hero-actions .button {
    min-height: 48px;
    border-radius: 7px;
  }

  .hero-stats {
    max-width: 190px;
    gap: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.34);
    padding-top: 16px;
    text-shadow: 0 2px 14px rgba(0, 0, 0, 0.38);
  }

  .hero-stats div {
    padding: 0;
  }

  .hero-stats dt {
    font-size: 32px;
  }

  .hero-stats dd {
    margin-top: 0;
    font-size: 14px;
  }

  .hero-stats,
  .trust-strip,
  .section-heading,
  .fleet-grid,
  .case-grid,
  .service-layout,
  .process-list,
  .quote-section {
    grid-template-columns: 1fr;
  }

  .trust-strip div {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    padding: 18px;
  }

  .fleet-card img {
    aspect-ratio: 16 / 10;
  }

  .mobile-cta {
    display: flex;
    right: 10px;
    bottom: 10px;
    left: 10px;
  }
}

@media (max-width: 520px) {
  .brand {
    min-width: 0;
    gap: 9px;
  }

  .brand-mark {
    width: 42px;
    height: 42px;
  }

  .brand small {
    display: none;
  }

  h1 {
    font-size: clamp(38px, 12vw, 48px);
  }

  .hero-actions .button {
    width: 100%;
  }

  .hero-stats div {
    padding-right: 0;
  }
}