*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: #1a2a3a;
  -webkit-font-smoothing: antialiased;
  background: #ffffff;
}

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

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

/* Layout helpers */
.air-pad {
  padding-left: 40px;
  padding-right: 40px;
}

.air-hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 64px;
  align-items: center;
}

.air-svc-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.air-flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* Header */
.air-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e7edf3;
}

.air-header-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 18px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.air-logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.air-logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex: none;
}

.air-logo {
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: 24px;
  letter-spacing: .04em;
  color: #0f2c52;
}

.air-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 14px;
  color: #33495f;
}

.air-nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
}

.air-nav-links a:hover {
  color: #1e5aa8;
}

.air-tel-btn {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 8px 18px 8px 12px;
  border-radius: 8px;
  border: 1px solid #dbe3ec;
  transition: border-color 0.2s;
}

.air-tel-btn:hover {
  border-color: #1e5aa8;
}

.air-tel-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 7px;
  background: #eaf1f9;
  flex: none;
}

.air-tel-label {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.air-tel-sub {
  font-size: 9.5px;
  letter-spacing: .16em;
  color: #8395a5;
}

.air-tel-num {
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: 19px;
  color: #0f2c52;
  letter-spacing: .01em;
  white-space: nowrap;
}

/* Hero */
.air-hero {
  position: relative;
  background: #a7c2e0;
  overflow: hidden;
}

.air-hero-blob {
  position: absolute;
  top: -120px;
  right: -80px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 111, 191, 0.10), transparent 70%);
  pointer-events: none;
}

.air-hero-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px 40px;
  position: relative;
}

.air-h1 {
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: 44px;
  line-height: 1.42;
  letter-spacing: .01em;
  color: #0f2c52;
}

.air-hero-desc {
  margin-top: 24px;
  font-size: 16px;
  line-height: 2;
  color: #48606f;
  max-width: 480px;
}

.air-hero-cta {
  margin-top: 36px;
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.air-phone-card {
  background: #fff;
  border: 1px solid #dde7f0;
  border-radius: 12px;
  padding: 18px 26px;
  box-shadow: 0 8px 24px rgba(15, 44, 82, 0.06);
}

.air-phone-card-label {
  font-size: 12px;
  letter-spacing: .1em;
  color: #7c8da0;
  margin-bottom: 6px;
}

.air-phone-card-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.air-phone-card-num {
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: 30px;
  letter-spacing: .02em;
  color: #0f2c52;
}

.air-hero-img-wrap {
  position: relative;
}

.air-hero-img-deco {
  position: absolute;
  bottom: -16px;
  right: -16px;
  width: calc(100% - 20px);
  height: calc(100% - 20px);
  border: 2px solid rgba(46, 111, 191, 0.25);
  border-radius: 18px;
  pointer-events: none;
}

.air-hero-img {
  position: relative;
  width: 100%;
  border-radius: 16px;
  box-shadow: 0 24px 60px rgba(15, 44, 82, 0.18);
  filter: brightness(1.05) saturate(1.02);
}

/* Section titles */
.air-sec-title {
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: 32px;
  color: #0f2c52;
  letter-spacing: .02em;
}

/* About section */
.air-about {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px;
}

.air-about-inner {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.air-about-text {
  margin-top: 26px;
  font-size: 16px;
  line-height: 2.1;
  color: #48606f;
}

/* Services section */
.air-services {
  background: #a7c2e0;
}

.air-services-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 40px;
}

.air-services-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 8px;
}

.air-svc-list {
  margin-top: 50px;
  display: flex;
  flex-direction: column;
  gap: 50px;
}

.air-svc-num {
  flex: none;
  font-family: 'Noto Serif JP', serif;
  font-size: 15px;
  font-weight: 600;
  color: #2e6fbf;
  background: #eaf1f9;
  border: 1px solid #d6e4f1;
  padding: 8px 14px;
  border-radius: 8px;
}

.air-svc-heading-row {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.air-svc-h3 {
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: 25px;
  color: #0f2c52;
}

.air-svc-body {
  font-size: 15.5px;
  line-height: 2.05;
  color: #4c6273;
}

.air-svc-photo {
  width: 100%;
  border-radius: 14px;
  box-shadow: 0 16px 40px rgba(15, 44, 82, 0.12);
}

/* Flow section */
.air-flow {
  position: relative;
  background: #ffffff;
  color: #0f2c52;
  overflow: hidden;
}

.air-flow-blob-tl {
  position: absolute;
  top: -100px;
  left: -60px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 111, 191, 0.08), transparent 70%);
  pointer-events: none;
}

.air-flow-blob-br {
  position: absolute;
  bottom: -120px;
  right: -40px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 111, 191, 0.08), transparent 70%);
  pointer-events: none;
}

.air-flow-inner {
  position: relative;
  max-width: 1160px;
  margin: 0 auto;
  padding: 40px;
}

.air-flow-head {
  text-align: center;
  margin-bottom: 50px;
}

.air-flow-head p {
  margin-top: 20px;
  font-size: 15px;
  line-height: 1.9;
  color: #5d7587;
}

.air-flow-step {
  position: relative;
  background: linear-gradient(165deg, #f6faff, #eef4fb);
  border: 1px solid #dde7f0;
  border-radius: 16px;
  padding: 38px 26px 32px;
  text-align: center;
  box-shadow: 0 8px 24px rgba(15, 44, 82, 0.06);
  transition: box-shadow 0.2s, border-color 0.2s;
}

.air-flow-step:hover {
  box-shadow: 0 14px 32px rgba(15, 44, 82, 0.12);
  border-color: #bcd2e8;
}

.air-flow-arrow {
  position: absolute;
  top: 50%;
  right: -17px;
  transform: translateY(-50%);
  z-index: 2;
  color: #6fa3df;
}

.air-flow-icon {
  margin: 0 auto 22px;
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: linear-gradient(150deg, #1e5aa8, #3f7fcf);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 26px rgba(30, 90, 168, 0.4);
}

.air-flow-step-label {
  font-family: 'Noto Serif JP', serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .18em;
  color: #6fa3df;
  margin-bottom: 10px;
}

.air-flow-step-title {
  font-size: 16.5px;
  font-weight: 500;
  line-height: 1.65;
}

/* Company section */
.air-company {
  background: #a7c2e0;
}

.air-company-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 40px;
}

.air-company-head {
  text-align: center;
  margin-bottom: 52px;
}

.air-company-table {
  border-top: 1px solid #e3ebf3;
}

.air-company-row {
  display: flex;
  border-bottom: 1px solid #e3ebf3;
  padding: 20px 6px;
  gap: 20px;
}

.air-company-dt {
  flex: 0 0 200px;
  font-weight: 500;
  color: #0f2c52;
  font-size: 15px;
}

.air-company-dd {
  font-size: 15px;
  color: #42596b;
  line-height: 1.7;
}

/* Contact section */
.air-contact {
  background: #ffffff;
}

.air-contact-inner {
  max-width: 780px;
  margin: 0 auto;
  padding: 40px;
  text-align: center;
}

.air-contact-title {
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: 30px;
  color: #0f2c52;
  line-height: 1.5;
  letter-spacing: .02em;
}

.air-contact-card {
  margin-top: 40px;
  display: inline-block;
  background: #fff;
  border: 1px solid #d6e2ee;
  border-radius: 16px;
  padding: 34px 56px;
  box-shadow: 0 18px 44px rgba(15, 44, 82, 0.10);
}

.air-contact-card-label {
  font-size: 12px;
  letter-spacing: .14em;
  color: #7c8da0;
  margin-bottom: 12px;
}

.air-contact-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.air-contact-num {
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: 40px;
  letter-spacing: .02em;
  color: #0f2c52;
}

/* Footer */
.air-footer {
  background: #0f2c52;
  color: #aebfd2;
}

.air-footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 52px 40px;
}

.air-footer-body {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 28px;
}

.air-footer-company-name {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Noto Serif JP', serif;
  font-weight: 600;
  font-size: 21px;
  color: #fff;
  letter-spacing: .04em;
  margin-bottom: 16px;
}

.air-footer-logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex: none;
  background: #fff;
  border-radius: 8px;
  padding: 4px;
}

.air-footer-address {
  font-size: 13.5px;
  line-height: 1.9;
  color: #aebfd2;
}

.air-footer-tel {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  font-size: 13.5px;
  color: #cdd9e8;
  transition: color 0.2s;
}

.air-footer-tel:hover {
  color: #fff;
}

.air-footer-nav {
  display: flex;
  gap: 30px;
  font-size: 13.5px;
}

.air-footer-nav a {
  color: #aebfd2;
  transition: color 0.2s;
}

.air-footer-nav a:hover {
  color: #fff;
}

.air-footer-copy {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12.5px;
  color: #7e94ab;
}

/* Responsive */
@media (max-width: 860px) {
  .air-br-pc {
    display: none;
  }

  .air-pad {
    padding-left: 24px !important;
    padding-right: 24px !important;
  }

  .air-header-inner {
    padding-left: 16px;
    padding-right: 16px;
    gap: 10px;
  }

  .air-logo-img {
    width: 30px;
    height: 30px;
  }

  .air-logo {
    font-size: 17px;
    letter-spacing: .02em;
    white-space: nowrap;
  }

  .air-tel-btn {
    padding: 6px 12px 6px 10px;
    gap: 8px;
  }

  .air-tel-icon {
    width: 28px;
    height: 28px;
  }

  .air-tel-num {
    font-size: 16px;
  }

  .air-h1 {
    font-size: 22px !important;
    letter-spacing: 0;
  }

  .air-sec-title {
    font-size: 27px !important;
  }

  .air-nav-links {
    display: none !important;
  }

  .air-hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .air-hero-img-wrap {
    display: none;
  }

  .air-hero-cta {
    display: none !important;
  }

  /* SP: ヒーロー背景をトップ写真に */
  .air-hero {
    background:
      linear-gradient(rgba(15, 44, 82, 0.72), rgba(15, 44, 82, 0.72)),
      url(../images/first-view.jpeg) center / cover no-repeat;
  }

  .air-hero .air-h1 {
    color: #ffffff !important;
  }

  .air-hero-desc {
    color: #eaf1f8 !important;
  }

  .air-svc-row {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .air-svc-row .air-svc-img-col {
    order: -1;
  }

  .air-flow-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .air-flow-arrow {
    display: none !important;
  }

  .air-about {
    padding-left: 24px;
    padding-right: 24px;
  }

  .air-contact-card {
    padding: 28px 32px;
  }

  .air-contact-num {
    font-size: 30px;
  }

  .air-company-dt {
    flex: 0 0 120px;
  }

  .air-footer-nav {
    flex-wrap: wrap;
    gap: 18px;
  }
}