:root {
  --ink: #111827;
  --muted: #5b6472;
  --line: #d9dde3;
  --paper: #f7f8fa;
  --white: #ffffff;
  --safety: #f5b301;
  --safety-dark: #c47a00;
  --steel: #256d85;
  --forest: #176b4d;
  --charcoal: #161a1d;
  --shadow: 0 22px 60px rgba(17, 24, 39, 0.14);
  font-family:
    "Pretendard",
    "Noto Sans KR",
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
}

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

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 100%;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(18px, 4vw, 64px);
  color: var(--white);
  transition:
    background 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease;
}

.site-header.scrolled {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 1px 18px rgba(17, 24, 39, 0.08);
  backdrop-filter: blur(14px);
}

.brand,
.main-nav,
.header-call {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  min-width: 168px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #151515;
  background: var(--safety);
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.1;
}

.brand small {
  margin-top: 4px;
  color: currentColor;
  opacity: 0.7;
  font-size: 12px;
}

.main-nav {
  gap: clamp(16px, 3vw, 34px);
  font-weight: 700;
  font-size: 15px;
}

.header-call {
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid currentColor;
  border-radius: 8px;
  font-weight: 900;
}

.hero {
  position: relative;
  min-height: 94vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  isolation: isolate;
}

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

.hero-video {
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #111827;
}

.hero-overlay {
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(9, 13, 18, 0.92) 0%, rgba(9, 13, 18, 0.72) 45%, rgba(9, 13, 18, 0.22) 100%),
    linear-gradient(0deg, rgba(9, 13, 18, 0.78) 0%, rgba(9, 13, 18, 0) 42%);
}

.hero-content {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: 150px 0 56px;
  color: var(--white);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--safety);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  word-break: keep-all;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(46px, 7vw, 92px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 690px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.btn {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 8px;
  padding: 0 22px;
  font-weight: 900;
  cursor: pointer;
}

.btn.primary {
  color: #121212;
  background: var(--safety);
}

.btn.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.btn.dark {
  color: var(--white);
  background: var(--charcoal);
}

.btn.full {
  width: 100%;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  width: min(900px, 100%);
  margin: 54px 0 0;
  border-radius: 8px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.17);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.trust-strip div {
  margin: 0;
  padding: 20px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(12px);
}

.trust-strip dt {
  font-size: 22px;
  font-weight: 900;
}

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

.quick-contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px clamp(18px, 4vw, 64px);
  color: var(--white);
  background: var(--forest);
}

.quick-contact strong,
.quick-contact span {
  display: block;
}

.quick-contact strong {
  font-size: 20px;
}

.quick-contact span {
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.77);
}

.section {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: 96px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 34px;
}

.section-head h2,
.fleet-copy h2,
.quote-copy h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.08;
  letter-spacing: 0;
}

.intro-grid,
.service-grid,
.steps {
  display: grid;
  gap: 18px;
}

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

.intro-grid article,
.service-card,
.steps li,
.quote-form,
.fleet-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.intro-grid article {
  padding: 26px;
}

.intro-grid span {
  color: var(--steel);
  font-weight: 900;
}

.intro-grid h3,
.service-card h3,
.steps h3 {
  margin: 18px 0 10px;
  font-size: 22px;
}

.intro-grid p,
.service-card p,
.steps p,
.fleet-copy p,
.quote-copy p,
.faq p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.service-band {
  width: 100%;
  max-width: none;
  padding: 96px clamp(18px, 4vw, 64px);
  background: var(--paper);
}

.service-band .section-head,
.service-grid {
  width: min(1120px, 100%);
  margin-left: auto;
  margin-right: auto;
}

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

.service-card {
  min-height: 250px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.service-card:nth-child(1) {
  border-top: 5px solid var(--safety);
}

.service-card:nth-child(2) {
  border-top: 5px solid var(--steel);
}

.service-card:nth-child(3) {
  border-top: 5px solid var(--forest);
}

.service-card:nth-child(4) {
  border-top: 5px solid var(--safety-dark);
}

.fleet {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 38px;
  align-items: center;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 30px;
  color: var(--ink);
  font-weight: 800;
}

.check-list li::before {
  content: "";
  position: absolute;
  top: 7px;
  left: 0;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: var(--safety);
  box-shadow: inset 0 0 0 5px #fff4c7;
}

.fleet-panel {
  min-height: 420px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-content: start;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.fleet-tab {
  min-height: 64px;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--white);
  font-weight: 900;
  cursor: pointer;
}

.fleet-tab:last-of-type {
  border-right: 0;
}

.fleet-tab.active {
  color: #141414;
  background: var(--safety);
}

.fleet-display {
  grid-column: 1 / -1;
  min-height: 356px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 32px;
  color: var(--white);
  background:
    linear-gradient(0deg, rgba(7, 10, 13, 0.84), rgba(7, 10, 13, 0.18)),
    url("https://images.unsplash.com/photo-1674478042441-d6f6a42f7bfd?auto=format&fit=crop&q=80&w=1400") center/cover;
}

.fleet-kicker {
  color: var(--safety);
  font-weight: 900;
}

.fleet-display h3 {
  margin: 12px 0 12px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.12;
}

.fleet-display p {
  margin: 0;
  max-width: 520px;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.7;
}

.process {
  padding-top: 28px;
}

.steps {
  grid-template-columns: repeat(3, 1fr);
  padding: 0;
  list-style: none;
}

.steps li {
  padding: 26px;
}

.steps span {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #141414;
  background: var(--safety);
  font-weight: 900;
}

.proof {
  color: var(--white);
  background: var(--charcoal);
}

.proof-inner {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: 64px 0;
}

.proof p {
  margin: 0 0 12px;
  color: var(--safety);
  font-weight: 900;
}

.proof strong {
  display: block;
  max-width: 850px;
  font-size: clamp(26px, 4vw, 46px);
  line-height: 1.2;
  letter-spacing: 0;
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px 22px;
  background: var(--white);
}

summary {
  font-size: 18px;
  font-weight: 900;
  cursor: pointer;
}

details p {
  margin-top: 12px;
}

.quote-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  padding: 96px clamp(18px, 4vw, 64px);
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(15, 23, 30, 0.94), rgba(15, 23, 30, 0.78)),
    url("https://images.unsplash.com/photo-1601584115197-04ecc0da31d7?auto=format&fit=crop&q=80&w=1800") center/cover;
}

.quote-copy {
  align-self: center;
}

.quote-copy p {
  color: rgba(255, 255, 255, 0.76);
}

.big-phone {
  display: inline-flex;
  margin-top: 28px;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
  color: var(--safety);
}

.quote-form {
  display: grid;
  gap: 16px;
  padding: 26px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
}

.quote-form label {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-weight: 900;
}

.quote-form input,
.quote-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px 15px;
  color: var(--ink);
  background: var(--white);
  outline: none;
}

.quote-form input:focus,
.quote-form textarea:focus {
  border-color: var(--steel);
  box-shadow: 0 0 0 4px rgba(37, 109, 133, 0.13);
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 34px clamp(18px, 4vw, 64px) 98px;
  background: #f0f2f4;
}

.site-footer p {
  margin: 8px 0 0;
  color: var(--muted);
}

.site-footer a {
  font-weight: 900;
}

.mobile-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  display: none;
  grid-template-columns: 1fr 1fr;
  box-shadow: 0 -12px 30px rgba(17, 24, 39, 0.12);
}

.mobile-cta a {
  min-height: 60px;
  display: grid;
  place-items: center;
  color: #141414;
  background: var(--safety);
  font-weight: 900;
}

.mobile-cta a + a {
  color: var(--white);
  background: var(--charcoal);
}

@media (max-width: 920px) {
  .main-nav {
    display: none;
  }

  .intro-grid,
  .service-grid,
  .fleet,
  .steps,
  .quote-section {
    grid-template-columns: 1fr;
  }

  .service-card {
    min-height: 190px;
  }
}

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

  .brand {
    min-width: 0;
  }

  .brand small,
  .header-call {
    display: none;
  }

  .hero {
    min-height: 92vh;
  }

  .hero-content {
    width: min(100% - 28px, 1120px);
    padding-bottom: 32px;
  }

  h1 {
    font-size: clamp(42px, 14vw, 64px);
  }

  .trust-strip {
    grid-template-columns: 1fr;
    margin-top: 36px;
  }

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

  .quick-contact .btn {
    width: 100%;
  }

  .section,
  .service-band,
  .quote-section {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .fleet-panel {
    min-height: 360px;
  }

  .fleet-display {
    min-height: 296px;
    padding: 24px;
  }

  .site-footer {
    display: block;
    padding-bottom: 92px;
  }

  .site-footer a {
    display: inline-flex;
    margin-top: 16px;
  }

  .mobile-cta {
    display: grid;
  }
}