:root {
  --navy: #001b3f;
  --navy-2: #002b5c;
  --blue: #075bbb;
  --red: #e31937;
  --ink: #111827;
  --muted: #5f6b7a;
  --line: #dbe2ea;
  --surface: #f4f7fb;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(7, 91, 187, 0.42);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  min-height: 86px;
  align-items: center;
  justify-content: space-between;
  padding: 0 5vw;
  border-bottom: 1px solid rgba(0, 27, 63, 0.12);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
}

.site-header .brand .yaojin-logo {
  color: var(--navy);
}

.brand-emblem {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  background: var(--navy);
  color: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: -0.05em;
  transform: skewX(-8deg);
}

.brand-emblem.inverse {
  border: 1px solid rgba(255, 255, 255, 0.45);
  background: var(--white);
  color: var(--navy);
}

.brand-type {
  display: block;
}

.brand-type strong {
  display: block;
  color: var(--navy);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0.13em;
  line-height: 1;
}

.brand-type small {
  display: block;
  margin-top: 6px;
  color: #566274;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.2vw, 34px);
  color: var(--navy);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

nav > a:not(.nav-contact) {
  position: relative;
  padding: 12px 0;
}

nav > a:not(.nav-contact)::after {
  position: absolute;
  right: 0;
  bottom: 6px;
  left: 0;
  height: 2px;
  background: var(--red);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

nav > a:hover::after,
nav > a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-contact {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 0 20px;
  background: var(--navy);
  color: var(--white);
  transition: background 180ms ease, transform 180ms ease;
}

.nav-contact:hover,
.nav-contact:focus-visible {
  background: var(--blue);
  transform: translateY(-1px);
}

.corporate-hero {
  display: grid;
  min-height: 680px;
  grid-template-columns: minmax(0, 56%) minmax(360px, 44%);
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(80px, 10vw, 150px) 7vw clamp(80px, 10vw, 150px) 9vw;
}

.eyebrow,
.section-label {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.24em;
}

.eyebrow {
  margin-bottom: 30px;
  color: var(--blue);
}

.corporate-hero h1 {
  max-width: 850px;
  margin-bottom: 30px;
  color: var(--navy);
  font-size: clamp(43px, 5.3vw, 78px);
  font-weight: 800;
  letter-spacing: 0.025em;
  line-height: 1.3;
}

.hero-lead {
  max-width: 650px;
  margin-bottom: 40px;
  color: var(--muted);
  font-size: 15px;
  line-height: 2.05;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 30px;
}

.button {
  display: inline-flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  padding: 0 28px;
  border: 1px solid transparent;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

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

.button-navy {
  background: var(--navy);
  color: var(--white);
}

.button-navy:hover,
.button-navy:focus-visible {
  background: var(--blue);
}

.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid rgba(0, 27, 63, 0.5);
  padding: 10px 0;
  color: var(--navy);
  font-size: 12px;
  font-weight: 800;
}

.arrow-link span,
.read-more b {
  color: var(--red);
}

.hero-brand-panel {
  position: relative;
  min-height: 680px;
  overflow: hidden;
  background: var(--navy);
  color: var(--white);
}

.hero-brand-panel::before {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, transparent 0 52%, rgba(7, 91, 187, 0.25) 52% 68%, transparent 68%),
    repeating-linear-gradient(90deg, transparent 0 72px, rgba(255, 255, 255, 0.035) 73px 74px);
  content: "";
}

.speed-line {
  position: absolute;
  right: -15%;
  height: 4px;
  background: var(--white);
  opacity: 0.85;
  transform: rotate(-17deg);
}

.line-one {
  top: 16%;
  width: 78%;
}

.line-two {
  top: 23%;
  width: 58%;
  background: var(--blue);
}

.line-three {
  right: -28%;
  bottom: 22%;
  width: 96%;
  height: 2px;
  opacity: 0.4;
}

.hero-brand-logo {
  position: absolute;
  top: 47%;
  left: 50%;
  z-index: 2;
  transform: translate(-50%, -50%) scale(1.35);
}

.century-badge {
  position: absolute;
  top: 8%;
  left: 8%;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  gap: 11px;
  color: var(--white);
}

.century-badge strong {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 48px;
  font-weight: 900;
  letter-spacing: -0.07em;
  line-height: 0.85;
}

.century-badge span {
  color: rgba(255, 255, 255, 0.65);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.14em;
  line-height: 1.6;
}

.panel-copy {
  position: absolute;
  right: 8%;
  bottom: 8%;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.19em;
  text-align: right;
}

.red-pin {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 12px;
  height: 34%;
  background: var(--red);
}

.identity-strip {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 7vw;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--navy);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.section {
  padding: clamp(90px, 11vw, 160px) 9vw;
}

.section-label {
  margin-bottom: 20px;
  color: var(--blue);
}

.jp-label {
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.section h2,
.principles-section h2,
.contact-section h2,
.yoshino-section h2 {
  margin-bottom: 0;
  color: var(--navy);
  font-size: clamp(32px, 4.1vw, 59px);
  font-weight: 800;
  letter-spacing: 0.025em;
  line-height: 1.45;
}

.company-intro {
  background: var(--white);
}

.company-intro > .section-label {
  margin-bottom: 56px;
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.82fr) minmax(420px, 1.18fr);
  gap: clamp(60px, 10vw, 150px);
}

.intro-copy {
  border-top: 4px solid var(--navy);
  padding-top: 32px;
}

.intro-copy p {
  margin-bottom: 23px;
  color: var(--muted);
  font-size: 14px;
  line-height: 2.1;
}

.intro-copy .intro-strong {
  color: var(--navy);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.8;
}

.business-section {
  background: var(--surface);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(360px, 1fr) minmax(330px, 0.8fr);
  gap: 11vw;
  align-items: end;
}

.section-head > p {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 2;
}

.business-list {
  margin-top: 76px;
  border-top: 1px solid #c9d2de;
}

.business-list article {
  display: grid;
  grid-template-columns: 170px minmax(250px, 0.72fr) minmax(320px, 1fr);
  gap: 45px;
  align-items: start;
  padding: 38px 0;
  border-bottom: 1px solid #c9d2de;
}

.business-index {
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--navy);
  font-family: Arial, Helvetica, sans-serif;
}

.business-index strong {
  font-size: 28px;
}

.business-index span {
  color: var(--blue);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.business-list h3,
.scope-grid h3 {
  margin-bottom: 12px;
  color: var(--navy);
  font-size: 20px;
  line-height: 1.55;
}

.business-list article > p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.95;
}

.projects-section {
  background: var(--white);
}

.projects-head {
  align-items: center;
}

.featured-project {
  display: grid;
  margin-top: 70px;
  border: 1px solid var(--line);
  grid-template-columns: minmax(360px, 0.95fr) minmax(400px, 1.05fr);
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.featured-project:hover,
.featured-project:focus-visible {
  border-color: rgba(7, 91, 187, 0.55);
  box-shadow: 0 24px 60px rgba(0, 27, 63, 0.12);
  transform: translateY(-4px);
}

.project-graphic {
  position: relative;
  min-height: 410px;
  overflow: hidden;
  padding: 36px;
  background: var(--navy);
  color: var(--white);
}

.project-graphic::before {
  position: absolute;
  right: -10%;
  bottom: -25%;
  width: 78%;
  height: 80%;
  border: 1px solid rgba(255, 255, 255, 0.17);
  border-radius: 50%;
  content: "";
}

.project-code,
.project-graphic-sub {
  position: relative;
  z-index: 2;
  display: block;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.project-graphic strong {
  position: relative;
  z-index: 2;
  display: block;
  margin-top: 65px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(70px, 10vw, 140px);
  font-weight: 900;
  letter-spacing: -0.07em;
  line-height: 0.85;
}

.project-graphic-sub {
  margin-top: 18px;
  color: #7bb4f3;
}

.graphic-house {
  position: absolute;
  right: 34px;
  bottom: 28px;
  width: 94px;
  height: 72px;
  border: 3px solid var(--white);
  border-top: 0;
  opacity: 0.75;
}

.graphic-house::before {
  position: absolute;
  top: -35px;
  left: -3px;
  width: 65px;
  height: 65px;
  border-top: 3px solid var(--white);
  border-left: 3px solid var(--white);
  content: "";
  transform: rotate(45deg);
}

.project-summary {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(45px, 6vw, 82px);
}

.project-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 30px;
  color: var(--blue);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.status-pill {
  padding: 6px 12px;
  background: #eaf2fd;
  color: var(--blue);
  font-family: inherit;
  letter-spacing: 0.04em;
}

.project-summary h3 {
  margin-bottom: 22px;
  color: var(--navy);
  font-size: clamp(24px, 2.5vw, 36px);
  line-height: 1.55;
}

.project-summary p {
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.95;
}

.read-more {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  color: var(--navy);
  font-size: 12px;
  font-weight: 800;
}

.principles-section {
  display: grid;
  min-height: 610px;
  grid-template-columns: 0.76fr 1.24fr;
  align-items: center;
  overflow: hidden;
  background: var(--navy);
  color: var(--white);
}

.principles-number {
  align-self: stretch;
  display: grid;
  place-items: center;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.1);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(260px, 36vw, 520px);
  font-weight: 900;
  line-height: 0.75;
  transform: translateX(-5%);
}

.principles-copy {
  padding: 80px 9vw;
}

.principles-section h2 {
  color: var(--white);
}

.jp-label.light {
  color: #7bb4f3;
}

.company-section {
  display: grid;
  grid-template-columns: minmax(300px, 0.72fr) minmax(480px, 1.28fr);
  gap: 10vw;
}

.heritage-note {
  display: grid;
  grid-template-columns: 105px 1fr;
  gap: 22px;
  align-items: center;
  margin-top: 34px;
  border-left: 4px solid var(--red);
  padding: 22px 26px;
  background: var(--surface);
}

.heritage-note strong {
  color: var(--navy);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 34px;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.heritage-note span {
  color: #445064;
  font-size: 12px;
  line-height: 1.9;
}

.company-brand-lockup {
  margin-top: 32px;
}

.profile-note {
  color: var(--muted);
  font-size: 11px;
}

.company-table {
  margin: 0;
  border-top: 4px solid var(--navy);
}

.company-table > div {
  display: grid;
  grid-template-columns: 145px 1fr;
  border-bottom: 1px solid var(--line);
  padding: 24px 0;
}

.company-table dt {
  color: var(--blue);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.company-table dd {
  margin: 0;
  color: #354052;
  font-size: 13px;
  line-height: 1.8;
}

.company-table a {
  border-bottom: 1px solid rgba(7, 91, 187, 0.35);
}

.contact-section {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 70px;
  align-items: center;
  padding: 90px 9vw;
  background: var(--surface);
}

.contact-section h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 3vw, 44px);
}

.contact-section p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.contact-mail {
  display: flex;
  min-width: 420px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 2px solid var(--navy);
  padding: 20px 0;
  color: var(--navy);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 20px;
  font-weight: 800;
}

.contact-mail b {
  color: var(--red);
}

footer {
  padding: 70px 5vw 24px;
  background: var(--navy);
  color: var(--white);
}

.footer-main {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 50px;
  padding-bottom: 70px;
}

.footer-brand .brand-type strong,
.footer-brand .brand-type small {
  color: var(--white);
}

.footer-brand .brand-type small {
  opacity: 0.65;
}

.footer-brand .yaojin-logo {
  color: var(--white);
}

.footer-links {
  display: flex;
  gap: 30px;
  font-size: 11px;
  font-weight: 700;
}

.footer-links a {
  opacity: 0.75;
  transition: opacity 180ms ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  opacity: 1;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding-top: 22px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 9px;
  letter-spacing: 0.09em;
}

/* Project detail */
.project-page-hero {
  position: relative;
  min-height: 650px;
  overflow: hidden;
  padding: 46px 8vw 80px;
  background: var(--navy);
  color: var(--white);
}

.project-page-hero::before {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 18%, rgba(7, 91, 187, 0.55), transparent 24%),
    repeating-linear-gradient(90deg, transparent 0 82px, rgba(255, 255, 255, 0.035) 83px 84px);
  content: "";
}

.project-breadcrumb {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 12px;
  color: rgba(255, 255, 255, 0.55);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.project-breadcrumb strong {
  color: var(--white);
}

.project-page-title {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(500px, 1fr) 290px;
  gap: 80px;
  align-items: end;
  margin-top: 120px;
}

.project-page-title h1 {
  margin-bottom: 0;
  font-size: clamp(42px, 5.5vw, 76px);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.light-blue {
  color: #7bb4f3;
}

.project-page-status {
  border-top: 3px solid var(--red);
  padding-top: 20px;
}

.project-page-status span,
.project-page-status strong {
  display: block;
}

.project-page-status span {
  margin-bottom: 10px;
  color: #7bb4f3;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.15em;
}

.project-page-status strong {
  font-size: 15px;
  line-height: 1.6;
}

.project-page-mark {
  position: absolute;
  right: -1%;
  bottom: -20%;
  color: rgba(255, 255, 255, 0.055);
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(330px, 45vw, 650px);
  font-weight: 900;
  line-height: 0.8;
}

.project-overview {
  display: grid;
  grid-template-columns: minmax(330px, 0.82fr) minmax(460px, 1.18fr);
  gap: 10vw;
}

.project-overview-copy {
  border-top: 4px solid var(--navy);
  padding-top: 30px;
}

.project-overview-copy p {
  margin-bottom: 23px;
  color: var(--muted);
  font-size: 14px;
  line-height: 2.05;
}

.project-overview-copy .project-overview-lead {
  color: var(--navy);
  font-size: 19px;
  font-weight: 800;
  line-height: 1.8;
}

.project-outline {
  display: grid;
  grid-template-columns: minmax(360px, 0.95fr) minmax(450px, 1.05fr);
  gap: 8vw;
  align-items: center;
  background: var(--surface);
}

.project-outline-graphic {
  position: relative;
  min-height: 430px;
  overflow: hidden;
  padding: 40px;
  background: var(--navy);
  color: var(--white);
}

.project-outline-graphic > span {
  font-family: Arial, Helvetica, sans-serif;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.project-outline-graphic > strong {
  display: block;
  margin-top: 50px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: clamp(140px, 20vw, 280px);
  font-weight: 900;
  letter-spacing: -0.08em;
  line-height: 0.8;
}

.outline-house {
  position: absolute;
  right: 30px;
  bottom: 30px;
  width: 105px;
  height: 80px;
  border: 3px solid #7bb4f3;
  border-top: 0;
}

.outline-house::before {
  position: absolute;
  top: -39px;
  left: -3px;
  width: 74px;
  height: 74px;
  border-top: 3px solid #7bb4f3;
  border-left: 3px solid #7bb4f3;
  content: "";
  transform: rotate(45deg);
}

.project-outline dl {
  margin: 0;
  border-top: 3px solid var(--navy);
}

.project-outline dl > div {
  display: grid;
  grid-template-columns: 115px 1fr;
  border-bottom: 1px solid #cbd4df;
  padding: 23px 0;
}

.project-outline dt {
  color: var(--blue);
  font-size: 11px;
  font-weight: 800;
}

.project-outline dd {
  margin: 0;
  color: #354052;
  font-size: 13px;
  line-height: 1.8;
}

.project-scope {
  background: var(--white);
}

.scope-heading {
  display: grid;
  grid-template-columns: 150px 180px 1fr;
  gap: 30px;
  align-items: start;
}

.scope-grid {
  display: grid;
  margin-top: 70px;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.scope-grid article {
  min-height: 300px;
  padding: 40px;
  border-right: 1px solid var(--line);
}

.scope-grid article:last-child {
  border-right: 0;
}

.scope-grid article > span {
  display: block;
  margin-bottom: 70px;
  color: var(--blue);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 11px;
  font-weight: 900;
}

.scope-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.yoshino-section {
  display: grid;
  min-height: 610px;
  grid-template-columns: 0.82fr 1.18fr;
  align-items: center;
  overflow: hidden;
  background: var(--navy);
  color: var(--white);
}

.yoshino-word {
  align-self: stretch;
  display: grid;
  place-items: center;
  border-right: 1px solid rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.08);
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: clamp(260px, 34vw, 490px);
  font-weight: 900;
  line-height: 0.8;
}

.yoshino-section > div:last-child {
  padding: 80px 9vw;
}

.yoshino-section h2 {
  margin-bottom: 28px;
  color: var(--white);
}

.yoshino-section p:last-child {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  line-height: 2.05;
}

.partner-offer {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(430px, 1.1fr);
  gap: 10vw;
}

.offer-copy {
  border-top: 4px solid var(--navy);
  padding-top: 30px;
}

.offer-copy p {
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 2.05;
}

.offer-copy .button {
  margin-top: 18px;
}

.back-home {
  display: flex;
  justify-content: center;
  border-top: 1px solid var(--line);
  padding: 44px 5vw;
  color: var(--navy);
  font-size: 12px;
  font-weight: 800;
}

/* Logo options */
.logo-options-page {
  min-height: 100vh;
  background: var(--surface);
}

.logo-options-intro {
  padding: 42px 7vw 78px;
  background: var(--white);
}

.logo-back {
  display: inline-flex;
  margin-bottom: 70px;
  border-bottom: 1px solid rgba(0, 27, 63, 0.28);
  padding: 8px 0;
  color: var(--navy);
  font-size: 11px;
  font-weight: 800;
}

.logo-options-heading {
  display: grid;
  grid-template-columns: minmax(480px, 1.35fr) minmax(320px, 0.65fr);
  gap: 9vw;
  align-items: end;
}

.logo-options-heading h1 {
  margin-bottom: 0;
  color: var(--navy);
  font-size: clamp(42px, 5vw, 72px);
  line-height: 1.3;
}

.logo-options-heading h1 span {
  white-space: nowrap;
}

.logo-options-heading > p {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 14px;
  line-height: 2;
}

.logo-options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  padding: 60px 5vw 100px;
}

.logo-option-card {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
}

.logo-card-head {
  display: grid;
  grid-template-columns: 52px 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 28px 30px;
  border-bottom: 1px solid var(--line);
}

.logo-letter {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  background: var(--navy);
  color: var(--white);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 21px;
  font-weight: 900;
}

.logo-card-head p {
  margin-bottom: 5px;
  color: var(--blue);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.17em;
}

.logo-card-head h2 {
  margin: 0;
  color: var(--navy);
  font-size: 22px;
}

.recommended {
  padding: 7px 11px;
  background: #eaf2fd;
  color: var(--blue);
  font-size: 9px;
  font-weight: 800;
}

.logo-stage {
  display: grid;
  min-height: 250px;
  place-items: center;
  padding: 42px 30px;
}

.light-stage {
  background: var(--white);
}

.dark-stage {
  min-height: 150px;
  background: var(--navy);
}

.yaojin-logo {
  display: inline-flex;
  align-items: center;
  gap: 21px;
  color: var(--navy);
}

.yaojin-symbol {
  width: 72px;
  height: 72px;
  flex: 0 0 auto;
  overflow: visible;
}

.symbol-fill {
  fill: currentColor;
}

.symbol-accent {
  fill: var(--red);
}

.symbol-stroke,
.symbol-outline {
  fill: none;
  stroke: currentColor;
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-width: 7px;
}

.symbol-stroke.thin,
.symbol-outline {
  stroke-width: 4px;
}

.logo-words strong {
  display: block;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  font-size: 38px;
  font-weight: 800;
  letter-spacing: 0.13em;
  line-height: 1;
  white-space: nowrap;
}

.logo-words small,
.word-only-mark small {
  display: block;
  margin-top: 10px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 8px;
  font-weight: 800;
  letter-spacing: 0.18em;
  white-space: nowrap;
}

.is-inverse {
  color: var(--white);
}

.seal-symbol {
  position: relative;
  display: grid;
  width: 76px;
  height: 76px;
  grid-template-rows: 0.9fr 1.1fr;
  place-items: center;
  border: 4px solid currentColor;
  padding: 7px 5px 6px;
  font-family: "Yu Mincho", "Hiragino Mincho ProN", serif;
  line-height: 1;
}

.seal-symbol span {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.seal-symbol strong {
  font-size: 31px;
}

.seal-symbol i {
  position: absolute;
  right: -4px;
  bottom: -4px;
  width: 13px;
  height: 13px;
  background: var(--red);
}

.word-only-mark strong {
  display: block;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", sans-serif;
  font-size: 48px;
  font-weight: 900;
  letter-spacing: 0.17em;
  line-height: 1;
  white-space: nowrap;
}

.word-only-mark > span {
  display: block;
  width: 68%;
  height: 4px;
  margin-top: 15px;
  background: var(--red);
}

.logo-option-copy {
  min-height: 160px;
  padding: 28px 30px;
  border-top: 1px solid var(--line);
}

.logo-option-copy p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.9;
}

.logo-option-copy .logo-concept {
  margin-bottom: 10px;
  color: var(--navy);
  font-size: 14px;
  font-weight: 800;
}

.header-sample {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 24px;
  border-top: 1px solid var(--line);
  background: #fbfcfe;
}

.yaojin-logo.is-compact {
  gap: 10px;
}

.is-compact .yaojin-symbol {
  width: 36px;
  height: 36px;
}

.is-compact .seal-symbol {
  width: 38px;
  height: 38px;
  border-width: 2px;
  padding: 3px;
}

.is-compact .seal-symbol span {
  font-size: 9px;
}

.is-compact .seal-symbol strong {
  font-size: 15px;
}

.is-compact .seal-symbol i {
  right: -2px;
  bottom: -2px;
  width: 7px;
  height: 7px;
}

.is-compact .logo-words strong {
  font-size: 20px;
}

.is-compact .logo-words small,
.is-compact .word-only-mark small {
  margin-top: 5px;
  font-size: 5px;
}

.is-compact .word-only-mark strong {
  font-size: 23px;
}

.is-compact .word-only-mark > span {
  height: 2px;
  margin-top: 6px;
}

.sample-nav {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--navy);
  font-size: 7px;
  font-weight: 800;
}

.sample-nav b {
  padding: 9px 11px;
  background: var(--navy);
  color: var(--white);
}

.logo-choice-guide {
  padding: 100px 14vw 120px;
  background: var(--navy);
  color: var(--white);
}

.logo-choice-guide h2 {
  margin-bottom: 24px;
  font-size: clamp(34px, 4.2vw, 58px);
  line-height: 1.4;
}

.logo-choice-guide > p:not(.eyebrow) {
  max-width: 760px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
  line-height: 2;
}

.logo-choice-guide .choice-note {
  margin-top: 30px;
  border-left: 4px solid var(--red);
  padding-left: 18px;
  color: var(--white);
  font-weight: 800;
}

@media (max-width: 960px) {
  nav > a:not(.nav-contact) {
    display: none;
  }

  .corporate-hero {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .hero-brand-panel {
    min-height: 430px;
  }

  .intro-grid,
  .project-overview,
  .partner-offer,
  .company-section,
  .section-head,
  .project-outline {
    grid-template-columns: 1fr;
    gap: 55px;
  }

  .business-list article {
    grid-template-columns: 125px minmax(220px, 0.8fr) 1fr;
    gap: 28px;
  }

  .featured-project {
    grid-template-columns: 1fr;
  }

  .project-graphic {
    min-height: 340px;
  }

  .principles-section,
  .yoshino-section {
    grid-template-columns: 0.65fr 1.35fr;
  }

  .contact-section {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .contact-mail {
    min-width: 0;
  }

  .project-page-title {
    grid-template-columns: 1fr;
    gap: 55px;
    margin-top: 95px;
  }

  .project-page-status {
    max-width: 320px;
  }

  .scope-heading {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .scope-grid article {
    padding: 30px;
  }

  .logo-options-heading,
  .logo-options-grid {
    grid-template-columns: 1fr;
  }

  .logo-options-heading {
    gap: 38px;
  }
}

@media (max-width: 640px) {
  .site-header {
    min-height: 72px;
    padding: 0 20px;
  }

  .brand-emblem {
    width: 36px;
    height: 36px;
    font-size: 13px;
  }

  .brand-type strong {
    font-size: 15px;
  }

  .brand-type small {
    font-size: 8px;
  }

  .nav-contact {
    min-height: 40px;
    padding: 0 13px;
    font-size: 10px;
  }

  .hero-content {
    padding: 78px 24px;
  }

  .corporate-hero h1 {
    font-size: clamp(36px, 10.5vw, 54px);
  }

  .hero-lead {
    font-size: 14px;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }

  .hero-brand-panel {
    min-height: 330px;
  }

  .hero-brand-logo {
    transform: translate(-50%, -50%) scale(1.02);
  }

  .century-badge strong {
    font-size: 38px;
  }

  .panel-copy {
    font-size: 8px;
  }

  .identity-strip {
    align-items: flex-start;
    flex-direction: column;
    gap: 13px;
    padding: 24px;
  }

  .section {
    padding: 86px 24px;
  }

  .section h2,
  .principles-section h2,
  .yoshino-section h2 {
    font-size: 34px;
  }

  .intro-grid,
  .project-overview,
  .partner-offer,
  .company-section,
  .section-head,
  .project-outline {
    gap: 42px;
  }

  .business-list {
    margin-top: 55px;
  }

  .business-list article {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 32px 0;
  }

  .business-index {
    align-items: baseline;
    flex-direction: row;
  }

  .featured-project {
    margin-top: 50px;
  }

  .project-graphic {
    min-height: 290px;
    padding: 28px;
  }

  .project-graphic strong {
    margin-top: 55px;
  }

  .project-summary {
    padding: 36px 28px;
  }

  .principles-section,
  .yoshino-section {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .principles-number,
  .yoshino-word {
    display: none;
  }

  .principles-copy,
  .yoshino-section > div:last-child {
    padding: 90px 24px;
  }

  .company-table > div {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .heritage-note {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .company-brand-lockup .yaojin-logo {
    gap: 13px;
  }

  .company-brand-lockup .seal-symbol {
    width: 60px;
    height: 60px;
  }

  .company-brand-lockup .logo-words strong {
    font-size: 29px;
  }

  .contact-section {
    padding: 76px 24px;
  }

  .contact-mail {
    font-size: 15px;
  }

  .footer-main,
  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-links {
    flex-wrap: wrap;
  }

  .project-page-hero {
    min-height: 610px;
    padding: 34px 24px 70px;
  }

  .project-page-title {
    margin-top: 80px;
  }

  .project-page-title h1 {
    font-size: 38px;
  }

  .project-outline-graphic {
    min-height: 320px;
  }

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

  .scope-grid article {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 34px 0;
  }

  .scope-grid article:last-child {
    border-bottom: 0;
  }

  .scope-grid article > span {
    margin-bottom: 35px;
  }

  .logo-options-intro {
    padding: 30px 24px 64px;
  }

  .logo-back {
    margin-bottom: 48px;
  }

  .logo-options-heading h1 {
    font-size: 38px;
  }

  .logo-options-grid {
    gap: 18px;
    padding: 28px 14px 70px;
  }

  .logo-card-head {
    grid-template-columns: 44px 1fr;
    padding: 22px;
  }

  .logo-letter {
    width: 44px;
    height: 44px;
  }

  .recommended {
    grid-column: 2;
    justify-self: start;
  }

  .logo-stage {
    min-height: 210px;
    padding: 35px 20px;
  }

  .dark-stage {
    min-height: 125px;
  }

  .yaojin-logo {
    gap: 13px;
  }

  .yaojin-symbol,
  .seal-symbol {
    width: 58px;
    height: 58px;
  }

  .logo-words strong {
    font-size: 28px;
  }

  .word-only-mark strong {
    font-size: 36px;
  }

  .logo-option-copy {
    min-height: auto;
    padding: 24px;
  }

  .sample-nav span {
    display: none;
  }

  .logo-choice-guide {
    padding: 86px 24px 100px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}