:root {
  --black: #111111;
  --dark: #2b2b2b;
  --gray: #707070;
  --light-gray: #d8d8d8;
  --pale-gray: #f3f3f3;
  --white: #ffffff;
  font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--white);
}

body {
  margin: 0;
  color: var(--black);
  background: var(--white);
  line-height: 2;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 16px clamp(20px, 5vw, 64px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--light-gray);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  display: block;
  width: 176px;
  height: auto;
}

.site-nav {
  display: flex;
  gap: 28px;
  align-items: center;
  color: var(--gray);
  font-size: 0.92rem;
}

.site-nav a[aria-current="page"],
.site-nav a:hover {
  color: var(--black);
}

.nav-toggle {
  display: none;
  min-height: 40px;
  padding: 0 12px;
  color: var(--black);
  background: var(--white);
  border: 1px solid var(--light-gray);
  border-radius: 0;
  font: inherit;
}

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.78fr) minmax(720px, 1fr);
  gap: clamp(42px, 7vw, 104px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(56px, 8vw, 104px) clamp(20px, 6vw, 72px);
  border-bottom: 1px solid var(--light-gray);
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
}

.hero-visual img {
  display: block;
  width: min(100%, 620px);
  height: auto;
  mix-blend-mode: multiply;
}

.kicker {
  margin: 0 0 18px;
  color: var(--gray);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 0;
  font-size: clamp(2.6rem, 5.4vw, 5.9rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0;
}

.hero-title {
  white-space: nowrap;
}

.hero-title span {
  display: block;
}

h2 {
  margin-bottom: 28px;
  font-size: clamp(1.55rem, 3vw, 2.7rem);
  line-height: 1.35;
  letter-spacing: 0;
}

.hero-intro {
  padding: clamp(46px, 7vw, 86px) clamp(20px, 6vw, 72px);
  border-bottom: 1px solid var(--light-gray);
}

.intro-text {
  max-width: none;
  color: var(--dark);
  font-size: clamp(1.05rem, 1.42vw, 1.22rem);
}

.intro-text p:last-child,
.essay-body p:last-child,
.longform p:last-child,
.contact-note p:last-child {
  margin-bottom: 0;
}

.essay {
  display: grid;
  grid-template-columns: minmax(200px, 0.45fr) minmax(340px, 0.8fr);
  gap: clamp(28px, 6vw, 92px);
  padding: clamp(58px, 8vw, 108px) clamp(20px, 6vw, 72px);
  border-bottom: 1px solid var(--light-gray);
}

.essay:nth-of-type(odd) {
  background: var(--pale-gray);
}

.essay-index {
  position: sticky;
  top: 104px;
  align-self: start;
}

.essay-index > p {
  margin-bottom: 18px;
  color: var(--gray);
  font-weight: 700;
}

.essay-body,
.longform,
.contact-note {
  color: var(--dark);
  font-size: clamp(1.02rem, 1.42vw, 1.15rem);
}

.essay-body p,
.longform p,
.contact-note p {
  margin-bottom: 1.55em;
}

.page-title {
  padding: clamp(58px, 8vw, 106px) clamp(20px, 6vw, 72px) clamp(46px, 7vw, 86px);
  border-bottom: 1px solid var(--light-gray);
}

.page-title h1 {
  max-width: none;
  font-size: clamp(2.25rem, 4.45vw, 5.15rem);
  line-height: 1.18;
}

.longform {
  max-width: 860px;
  margin: 0 auto;
  padding: clamp(56px, 8vw, 112px) clamp(20px, 5vw, 40px);
}

.longform h2 {
  margin-top: 2.4em;
  padding-top: 1.8em;
  border-top: 1px solid var(--light-gray);
}

.longform h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.representative-profile {
  display: grid;
  grid-template-columns: minmax(240px, 0.45fr) minmax(360px, 0.8fr);
  gap: clamp(30px, 6vw, 80px);
  align-items: start;
  padding: clamp(56px, 8vw, 104px) clamp(20px, 6vw, 72px);
  background: var(--pale-gray);
  border-top: 1px solid var(--light-gray);
  border-bottom: 1px solid var(--light-gray);
}

.profile-media img {
  display: block;
  width: min(100%, 360px);
  height: auto;
  border: 1px solid var(--light-gray);
}

.profile-content {
  max-width: 780px;
  color: var(--dark);
  font-size: clamp(1.02rem, 1.42vw, 1.15rem);
}

.profile-content h2 {
  margin-bottom: 16px;
}

.profile-name {
  color: var(--black);
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 700;
  line-height: 1.45;
}

.sns-section {
  padding: clamp(54px, 8vw, 96px) clamp(20px, 6vw, 72px);
}

.sns-heading {
  max-width: 860px;
  margin-bottom: 30px;
}

.sns-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.sns-group {
  min-height: 220px;
  padding: 22px;
  border: 1px solid var(--light-gray);
}

.sns-group h3 {
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--light-gray);
  font-size: 1rem;
}

.sns-group a {
  display: block;
  padding: 9px 0;
  color: var(--dark);
  line-height: 1.55;
  border-bottom: 1px solid var(--pale-gray);
}

.sns-group a:hover {
  color: var(--black);
  border-bottom-color: var(--black);
}

.service-teaser,
.service-overview,
.service-list,
.service-scope,
.service-choice,
.service-examples,
.service-mismatch {
  padding: clamp(54px, 8vw, 96px) clamp(20px, 6vw, 72px);
  border-bottom: 1px solid var(--light-gray);
}

.teaser-grid,
.service-list,
.scope-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.teaser-grid article,
.service-card,
.scope-grid article {
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--light-gray);
}

.teaser-grid p,
.service-card p,
.scope-grid li,
.service-choice p,
.service-mismatch p,
.examples-list p,
.service-overview p {
  color: var(--dark);
}

.service-overview {
  font-size: clamp(1.08rem, 1.55vw, 1.26rem);
}

.service-overview p,
.service-choice p,
.service-mismatch p {
  max-width: 1120px;
}

.examples-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--light-gray);
}

.examples-list p {
  margin: 0;
  padding: 18px 0;
  border-bottom: 1px solid var(--light-gray);
}

.service-number {
  color: var(--gray);
  font-weight: 700;
}

.service-lead {
  font-size: clamp(1.16rem, 1.7vw, 1.38rem);
  font-weight: 700;
  line-height: 1.7;
}

.service-price {
  margin: 28px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--light-gray);
}

.service-price div {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 18px;
}

.service-price dt {
  color: var(--gray);
  font-weight: 700;
}

.service-price dd {
  margin: 0;
  color: var(--black);
  font-size: clamp(1.12rem, 1.8vw, 1.5rem);
  font-weight: 700;
  line-height: 1.5;
}

.scope-grid ul {
  margin: 0;
  padding-left: 1.2em;
}

.scope-grid li + li {
  margin-top: 10px;
}

.cta-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(34px, 5vw, 56px) clamp(20px, 6vw, 72px);
  color: var(--white);
  background: var(--black);
}

.cta-block p {
  margin: 0;
  font-size: clamp(1.18rem, 2.2vw, 2rem);
  font-weight: 700;
  line-height: 1.45;
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border-bottom: 1px solid currentColor;
  font-weight: 700;
  line-height: 1.3;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.66fr) minmax(340px, 0.86fr);
  gap: clamp(30px, 6vw, 84px);
  padding: clamp(54px, 8vw, 96px) clamp(20px, 6vw, 72px);
}

.contact-note {
  padding-top: 4px;
}

.contact-form {
  display: grid;
  gap: 22px;
  padding: clamp(24px, 4vw, 42px);
  background: var(--pale-gray);
  border: 1px solid var(--light-gray);
}

label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  color: var(--black);
  background: var(--white);
  border: 1px solid var(--light-gray);
  border-radius: 0;
  font: inherit;
}

textarea {
  resize: vertical;
}

.submit-button {
  min-height: 52px;
  color: var(--white);
  background: var(--black);
  border: 1px solid var(--black);
  border-radius: 0;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.submit-button:disabled {
  color: var(--light-gray);
  cursor: wait;
}

.thanks {
  max-width: 900px;
  margin: 0 auto;
  padding: clamp(72px, 12vw, 150px) clamp(20px, 5vw, 40px);
}

.thanks h1 {
  margin-bottom: 30px;
  font-size: clamp(2.6rem, 6vw, 5.6rem);
}

.thanks p {
  color: var(--dark);
  font-size: 1.12rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 6vw, 72px);
  color: var(--gray);
  border-top: 1px solid var(--light-gray);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

@media (max-width: 900px) {
  .hero,
  .hero-intro,
  .essay,
  .teaser-grid,
  .service-list,
  .scope-grid,
  .representative-profile,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-title {
    font-size: clamp(2.35rem, 9vw, 4.5rem);
  }

  .hero-visual {
    min-height: auto;
    justify-content: flex-start;
  }

  .hero-visual img {
    width: min(100%, 520px);
  }

  .essay-index {
    position: static;
  }

  .cta-block,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .sns-groups {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .hero-title {
    font-size: clamp(1.85rem, 8.6vw, 2.9rem);
    line-height: 1.16;
  }
}

@media (max-width: 700px) {
  .site-header {
    min-height: 66px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
  }

  .site-nav:not(.always) {
    position: absolute;
    top: 66px;
    right: 20px;
    left: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
    background: var(--white);
    border: 1px solid var(--light-gray);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 12px 14px;
  }
}