:root {
  --color-bg: #f6f9fc;
  --color-base: #ffffff;
  --color-main: #183b63;
  --color-main-deep: #122b47;
  --color-accent: #2f6fb2;
  --color-sub: #5f7488;
  --color-text: #22313f;
  --color-border: #d7e1ea;
  --color-soft: #eef4f9;
  --color-footer: #0f1c2b;
  --shadow-sm: 0 10px 30px rgba(17, 38, 63, 0.06);
  --shadow-md: 0 16px 40px rgba(17, 38, 63, 0.1);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --width-base: 1120px;
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-base);
  font-family:
    "Hiragino Sans",
    "Yu Gothic",
    "Meiryo",
    sans-serif;
  line-height: 1.8;
  letter-spacing: 0.02em;
}

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

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

p,
ul,
dl {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

.container {
  width: min(100% - 32px, var(--width-base));
  margin-inline: auto;
}

.narrow {
  width: min(100% - 32px, 860px);
  margin-inline: auto;
}

.section {
  padding: 72px 0;
}

.alt-bg {
  background: var(--color-bg);
}

.center {
  text-align: center;
}

.section-head {
  margin-bottom: 32px;
}

.section-label {
  margin-bottom: 10px;
  color: var(--color-accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.section-title {
  margin-bottom: 12px;
  color: var(--color-main);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  line-height: 1.4;
  letter-spacing: 0.03em;
}

.section-lead {
  color: var(--color-sub);
  font-size: 1rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 180px;
  padding: 14px 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 700;
  text-align: center;
  transition:
    transform var(--transition),
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
  cursor: pointer;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--color-main);
  color: #fff;
  box-shadow: 0 10px 24px rgba(24, 59, 99, 0.2);
}

.button-primary:hover {
  background: var(--color-main-deep);
}

.button-secondary {
  background: #fff;
  color: var(--color-main);
  border-color: var(--color-main);
}

.button-secondary:hover {
  background: var(--color-soft);
}

.card-grid {
  display: grid;
  gap: 20px;
}

.card {
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.card-title {
  margin-bottom: 12px;
  color: var(--color-main);
  font-size: 1.18rem;
  line-height: 1.5;
}

.card-text {
  color: var(--color-sub);
  font-size: 0.98rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(215, 225, 234, 0.9);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 76px;
}

.site-logo {
  color: var(--color-main);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.site-nav {
  display: none;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-list a {
  color: var(--color-sub);
  font-size: 0.95rem;
  font-weight: 600;
  transition: color var(--transition);
}

.nav-list a:hover {
  color: var(--color-main);
}

.header-contact {
  min-width: auto;
  padding: 12px 18px;
  font-size: 0.92rem;
}

.hero {
  padding: 84px 0 72px;
  background:
    radial-gradient(circle at top right, rgba(47, 111, 178, 0.12), transparent 28%),
    linear-gradient(180deg, #f9fbfe 0%, #ffffff 100%);
}

.hero-inner {
  display: grid;
  gap: 32px;
  align-items: center;
}

.hero-label {
  margin-bottom: 12px;
  color: var(--color-accent);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero-title {
  margin: 0 0 20px;
  color: var(--color-main);
  font-size: clamp(2.1rem, 5.4vw, 3.8rem);
  line-height: 1.3;
  letter-spacing: 0.03em;
}

.hero-text {
  max-width: 720px;
  margin-bottom: 28px;
  color: var(--color-sub);
  font-size: 1rem;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.hero-panel {
  display: grid;
  gap: 16px;
}

.hero-card,
.hero-subcard {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.hero-card {
  padding: 28px;
}

.hero-card-label {
  margin-bottom: 14px;
  color: var(--color-accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

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

.hero-card-list li {
  position: relative;
  padding-left: 18px;
  color: var(--color-main);
  font-weight: 700;
}

.hero-card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  transform: translateY(-50%);
}

.hero-subcard {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 18px;
}

.hero-subcard span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  background: var(--color-soft);
  color: var(--color-main);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
}

.intro-body {
  display: grid;
  gap: 18px;
  color: var(--color-sub);
  font-size: 1rem;
  text-align: center;
}

.services-grid,
.strengths-grid,
.flow-grid {
  grid-template-columns: 1fr;
}

.service-card {
  position: relative;
  overflow: hidden;
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 52px;
  height: 52px;
  margin-bottom: 18px;
  padding: 0 12px;
  background: var(--color-soft);
  color: var(--color-accent);
  border-radius: 999px;
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.problem-box {
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.problem-list {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.problem-list li {
  position: relative;
  padding-left: 24px;
  color: var(--color-text);
  font-weight: 500;
}

.problem-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-accent);
  font-weight: 800;
}

.problem-note {
  color: var(--color-sub);
}

.profile-inner {
  display: grid;
  gap: 28px;
  align-items: start;
}

.profile-visual {
  display: flex;
  justify-content: center;
}

.profile-photo-placeholder {
  width: 100%;
  min-height: 320px;
  display: grid;
  place-items: center;
  background:
    linear-gradient(135deg, #eef4f9, #dfeaf4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-main);
  font-weight: 800;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow-sm);
}

.profile-content {
  display: grid;
  gap: 16px;
}

.profile-name {
  color: var(--color-main);
  font-size: 1.08rem;
  font-weight: 800;
}

.profile-data {
  display: grid;
  gap: 16px;
  margin-top: 8px;
  padding-top: 8px;
}

.profile-row {
  display: grid;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
}

.profile-row dt {
  color: var(--color-main);
  font-weight: 700;
}

.profile-row dd {
  color: var(--color-sub);
  margin: 0;
}

.works-layout {
  display: grid;
  gap: 24px;
}

.works-copy {
  display: grid;
  gap: 16px;
  color: var(--color-sub);
}

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

.works-list li {
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  color: var(--color-main);
  font-weight: 700;
}

.flow-card {
  height: 100%;
}

.flow-step {
  margin-bottom: 10px;
  color: var(--color-accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.contact-section {
  background:
    linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

.contact-inner {
  display: grid;
  gap: 28px;
}

.contact-copy {
  display: grid;
  gap: 12px;
}

.contact-text {
  color: var(--color-sub);
}

.contact-form {
  display: grid;
  gap: 18px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.form-group {
  display: grid;
  gap: 8px;
}

.form-group label {
  color: var(--color-main);
  font-size: 0.95rem;
  font-weight: 700;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  outline: none;
  font: inherit;
  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(47, 111, 178, 0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 160px;
}

.form-button {
  width: 100%;
}

.site-footer {
  padding: 32px 0;
  background: var(--color-footer);
  color: #dfe8f1;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-logo {
  color: #fff;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.footer-text {
  color: #c5d1dc;
  font-size: 0.95rem;
}

.footer-copy {
  color: #aebecd;
  font-size: 0.88rem;
}

.sp-only {
  display: inline;
}

@media (min-width: 768px) {
  .section {
    padding: 96px 0;
  }

  .site-nav {
    display: block;
  }

  .header-contact {
    padding-inline: 20px;
  }

  .hero {
    padding: 110px 0 96px;
  }

  .hero-inner {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
  }

  .hero-buttons {
    flex-direction: row;
    align-items: center;
  }

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

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

  .profile-inner {
    grid-template-columns: 360px 1fr;
    gap: 48px;
  }

  .works-layout {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }

  .contact-inner {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 40px;
    align-items: start;
  }

  .footer-inner {
    flex-direction: row;
    align-items: end;
    justify-content: space-between;
  }

  .sp-only {
    display: none;
  }
}

@media (max-width: 767px) {
  .header-contact {
    min-width: auto;
    padding: 10px 14px;
    font-size: 0.85rem;
  }

  .site-logo {
    font-size: 0.98rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .button {
    width: 100%;
  }

  .header-inner {
    gap: 10px;
  }

  .container,
  .narrow {
    width: min(100% - 24px, var(--width-base));
  }
}

.contact-form.is-disabled {
  position: relative;
  background: #f3f6f9;
  border-color: #cfd8e3;
}

.contact-form.is-disabled fieldset {
  margin: 0;
  padding: 0;
  border: 0;
  opacity: 0.5;
}

.contact-form.is-disabled .form-disabled-message {
  margin-bottom: 20px;
  padding: 14px 16px;
  background: #e5edf5;
  color: #183b63;
  border: 1px solid #cfd8e3;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 700;
  text-align: center;
}

.contact-form.is-disabled input,
.contact-form.is-disabled textarea,
.contact-form.is-disabled button {
  cursor: not-allowed;
}

.contact-form.is-disabled .form-button {
  background: #9aa9b8;
  border-color: #9aa9b8;
  box-shadow: none;
}