:root {
  --brand: #0369a1;
  --brand-dark: #0f3f5f;
  --teal: #0f766e;
  --sky: #38bdf8;
  --ink: #10202b;
  --muted: #526371;
  --line: #dbe7ef;
  --soft: #f4f9fc;
  --white: #ffffff;
  --warn: #facc15;
  --shadow: 0 14px 36px rgba(16, 32, 43, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

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

a {
  color: inherit;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 8px;
  color: var(--white);
  background: linear-gradient(135deg, var(--brand), var(--teal));
  font-size: 1rem;
  box-shadow: 0 8px 20px rgba(3, 105, 161, 0.28);
}

.brand-text span {
  display: block;
}

.brand-name {
  font-size: 1.08rem;
  color: var(--brand-dark);
}

.brand-sub {
  font-size: 0.78rem;
  color: var(--muted);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--brand-dark);
  font-size: 1.4rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.main-nav a {
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--brand);
}

.nav-cta {
  padding: 10px 16px;
  border-radius: 8px;
  color: var(--white) !important;
  background: var(--teal);
}

.hero {
  position: relative;
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(11, 45, 66, 0.92) 0%, rgba(11, 45, 66, 0.72) 46%, rgba(11, 45, 66, 0.16) 100%),
    url("../images/hero-ac-service.webp") center / cover no-repeat;
}

.hero-content {
  width: min(680px, 100%);
  padding: 90px 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 0.86rem;
  font-weight: 800;
  text-transform: uppercase;
}

.hero h1,
.page-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2.35rem, 7vw, 4.6rem);
  line-height: 1.03;
}

.hero p {
  max-width: 620px;
  margin: 0 0 28px;
  color: #e7f5fb;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 20px;
  border: 0;
  border-radius: 8px;
  background: var(--brand);
  color: var(--white);
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--brand-dark);
}

.btn.alt {
  background: var(--teal);
}

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

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 760px;
  margin-top: 36px;
}

.trust-item {
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
}

.trust-item strong {
  display: block;
  font-size: 1.02rem;
}

.trust-item span {
  color: #d8eef7;
  font-size: 0.9rem;
}

.section {
  padding: 72px 0;
}

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

.section-head {
  width: min(760px, 100%);
  margin: 0 auto 34px;
  text-align: center;
}

.section-head.left {
  margin-left: 0;
  text-align: left;
}

.section-head h2,
.content h2 {
  margin: 0 0 12px;
  color: var(--brand-dark);
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  line-height: 1.12;
}

.section-head p,
.content p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.grid {
  display: grid;
  gap: 22px;
}

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

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

.card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 8px 24px rgba(16, 32, 43, 0.08);
}

.card-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.card-body {
  padding: 24px;
}

.card h3 {
  margin: 0 0 10px;
  color: var(--brand-dark);
  font-size: 1.25rem;
}

.card p {
  margin: 0 0 18px;
  color: var(--muted);
}

.text-link {
  color: var(--brand);
  font-weight: 800;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.85fr);
  gap: 38px;
  align-items: center;
}

.media-frame {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.feature-list {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.feature {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.feature strong {
  display: block;
  margin-bottom: 4px;
  color: var(--brand-dark);
}

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

.areas {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 24px 0 0;
  list-style: none;
}

.areas li,
.tag {
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--brand-dark);
  font-weight: 700;
}

.process {
  counter-reset: step;
}

.step {
  position: relative;
  padding: 24px;
}

.step:before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  width: 34px;
  height: 34px;
  margin-bottom: 14px;
  place-items: center;
  border-radius: 8px;
  color: var(--white);
  background: var(--brand);
  font-weight: 900;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1fr);
  gap: 24px;
  align-items: start;
}

.contact-box,
.form-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 8px 24px rgba(16, 32, 43, 0.08);
}

.contact-box {
  padding: 26px;
}

.contact-box h3,
.form-box h3 {
  margin: 0 0 18px;
  color: var(--brand-dark);
  font-size: 1.35rem;
}

.contact-line {
  margin-bottom: 18px;
}

.contact-line strong {
  display: block;
  margin-bottom: 4px;
  color: var(--brand-dark);
}

.contact-line a {
  color: var(--brand);
  font-weight: 800;
  text-decoration: none;
}

.form-box {
  padding: 26px;
}

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

.form-group.full {
  grid-column: 1 / -1;
}

label {
  display: block;
  margin-bottom: 7px;
  color: var(--brand-dark);
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fbfdff;
  font: inherit;
}

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

input:focus,
select:focus,
textarea:focus {
  outline: 3px solid rgba(56, 189, 248, 0.26);
  border-color: var(--brand);
}

.form-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.alert {
  display: none;
  margin-bottom: 18px;
  padding: 12px 14px;
  border-radius: 8px;
  font-weight: 800;
}

.alert.show {
  display: block;
}

.alert.error {
  color: #7f1d1d;
  background: #fee2e2;
}

.page-hero {
  padding: 76px 0;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(11, 45, 66, 0.94), rgba(3, 105, 161, 0.76)),
    url("../images/hero-ac-service.webp") center / cover no-repeat;
}

.page-hero p {
  max-width: 720px;
  margin: 0;
  color: #e7f5fb;
  font-size: 1.13rem;
}

.content {
  max-width: 840px;
}

.content h3 {
  margin: 28px 0 10px;
  color: var(--brand-dark);
}

.content p,
.content li {
  color: var(--muted);
}

.content a {
  color: var(--brand);
  font-weight: 800;
}

.service-detail {
  scroll-margin-top: 96px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 8px 24px rgba(16, 32, 43, 0.08);
}

.service-detail h2 {
  margin-top: 0;
}

.service-detail img {
  width: 100%;
  margin-bottom: 18px;
  border-radius: 8px;
  aspect-ratio: 16 / 8;
  object-fit: cover;
}

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

details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 16px 18px;
}

summary {
  cursor: pointer;
  color: var(--brand-dark);
  font-weight: 900;
}

details p {
  margin: 10px 0 0;
  color: var(--muted);
}

.site-footer {
  padding: 46px 0 90px;
  color: #dff3f9;
  background: var(--brand-dark);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.site-footer h3 {
  margin: 0 0 12px;
  color: var(--white);
}

.site-footer p {
  margin: 0;
}

.footer-links {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.footer-links a,
.site-footer a {
  color: #dff3f9;
  text-decoration: none;
}

.footer-links a:hover,
.site-footer a:hover {
  color: var(--sky);
}

.copyright {
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  color: #b9d8e5;
  font-size: 0.9rem;
}

.wa-float {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 80;
  display: grid;
  width: 56px;
  height: 56px;
  place-items: center;
  border-radius: 50%;
  background: #25d366;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
}

.wa-float img {
  width: 42px;
  height: 42px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 12px;
  z-index: 100;
  padding: 10px;
  background: var(--white);
}

.skip-link:focus {
  left: 12px;
}

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

  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    padding: 18px 24px 24px;
    border-bottom: 1px solid var(--line);
    background: var(--white);
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: stretch;
  }

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

  .main-nav a {
    padding: 8px 0;
  }

  .grid.three,
  .grid.two,
  .split,
  .contact-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .trust-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 24px, 1120px);
  }

  .hero {
    min-height: auto;
    background:
      linear-gradient(180deg, rgba(11, 45, 66, 0.96), rgba(11, 45, 66, 0.66)),
      url("../images/hero-ac-service.webp") center / cover no-repeat;
  }

  .hero-content {
    padding: 72px 0;
  }

  .section {
    padding: 52px 0;
  }

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

  .brand-sub {
    display: none !important;
  }

  .service-detail {
    padding: 22px;
  }
}