@charset "UTF-8";

/* ============================================
   事業承継とは - Stylesheet
   ============================================ */

/* ---------- Variables ---------- */
:root {
  --color-primary: #0a337c;
  --color-secondary: #18181c;
  --color-bg: #ffffff;
  --color-card-bg: #fcfae8;
  --color-footer-bg: #dfe4ed;
  --color-hero-bg: rgba(241, 243, 247, 0.8);
  --color-accent-bg: #f8f9fa;
  --color-merit-bg: #dfe4ed;
  --color-challenge-bg: #fff5f5;
  --color-merit-blue: #0e508e;
  --color-challenge-red: #d4183d;
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-display: 'Zen Kaku Gothic New', sans-serif;
  --font-mono: 'Montserrat', sans-serif;
  --font-open: 'Open Sans', sans-serif;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--color-secondary);
  background: var(--color-bg);
  line-height: 1.75;
}

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

ul {
  list-style: none;
}

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

/* ============================================
   Page Hero Section
   ============================================ */
.page-hero {
  width: 100%;
  background: var(--color-hero-bg) url('../img/bg_headder_containts.png') center center / cover no-repeat;
  margin-top: 77px;
}

.page-hero__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 60px 24px;
}

.page-hero__content {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

.page-hero__title {
  font-family: var(--font-display);
  font-size: 72px;
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 0.8px;
  line-height: 0.86;
}

.page-hero__subtitle {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 400;
  color: var(--color-primary);
  letter-spacing: 0.8px;
  line-height: 0.93;
}

/* ============================================
   Main Content
   ============================================ */
.main {
  width: 100%;
}

.main__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 80px 24px;
  gap: 80px;
}

/* ============================================
   Intro Section
   ============================================ */
.intro-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  width: 100%;
  max-width: 840px;
}

.intro-text {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  color: var(--color-secondary);
  letter-spacing: 0.8px;
  line-height: 1.75;
  text-align: center;
}

/* Page Navigation */
.page-nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  width: 100%;
  max-width: 800px;
}

.page-nav__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 0 0 32px;
  height: 92px;
  background: var(--color-footer-bg);
  border-radius: 16px;
  border: 2px solid transparent;
  transition: border-color 0.3s ease, background-color 0.3s ease;
}

.page-nav__item:hover {
  border-color: var(--color-primary);
  background-color: #e8ecf4;
}

.page-nav__number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-bg);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: #207175;
  flex-shrink: 0;
}

.page-nav__label {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  color: #333333;
  line-height: 1.5;
}

/* ============================================
   Section Heading
   ============================================ */
.content-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  width: 100%;
}

.section-heading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.section-heading__title {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 2.4px;
  line-height: 1.65;
  text-align: center;
}

.section-heading__en {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 300;
  color: var(--color-primary);
  letter-spacing: 0.8px;
  line-height: 1.4;
  text-align: center;
}

/* ============================================
   Section 1: Info Banner
   ============================================ */
.info-banner {
  display: flex;
  border-radius: 20px;
  overflow: hidden;
  width: 100%;
}

.info-banner__text {
  flex: 1;
  background: var(--color-accent-bg);
  padding: 80px 48px;
  border-radius: 20px 0 0 20px;
}

.info-banner__text p {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  color: var(--color-secondary);
  letter-spacing: 0.8px;
  line-height: 1.75;
}

.info-banner__image {
  width: 507px;
  flex-shrink: 0;
  border-radius: 0 20px 20px 0;
  min-height: 300px;
  overflow: hidden;
  position: relative;
}

.info-banner__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Section 1: Importance Box */
.importance-box {
  display: flex;
  flex-direction: column;
  gap: 24px;
  width: 100%;
  background: var(--color-card-bg);
  border-radius: 20px;
  padding: 40px 80px;
}

.importance-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.importance-item__title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-secondary);
  letter-spacing: 1.1px;
  line-height: 1.5;
}

.importance-item__text {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  color: var(--color-secondary);
  letter-spacing: 0.8px;
  line-height: 1.7;
  padding: 0 10px;
}

/* ============================================
   Section 2: Type Cards
   ============================================ */
.type-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  width: 100%;
}

.type-card {
  background: var(--color-accent-bg);
  border: 2px solid var(--color-accent-bg);
  border-radius: 24px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.type-card__icon {
  width: 128px;
  height: 128px;
  background: var(--color-footer-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.type-card__icon::before {
  content: '';
  position: absolute;
  inset: 8px;
  background: var(--color-bg);
  border-radius: 50%;
}

.type-card__icon svg {
  position: relative;
  z-index: 1;
}

.type-card__title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  color: #000000;
  letter-spacing: 1.1px;
  line-height: 1.5;
}

.type-card__desc {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  color: var(--color-secondary);
  line-height: 1.625;
}

.type-card__tags {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
}

.tag {
  border-radius: 14px;
  padding: 17px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.tag--merit {
  background: var(--color-merit-bg);
  border: 1px solid rgba(32, 33, 117, 0.2);
}

.tag--challenge {
  background: var(--color-challenge-bg);
  border: 1px solid rgba(212, 24, 61, 0.2);
}

.tag__badge {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #ffffff;
}

.tag__badge--blue {
  background: var(--color-merit-blue);
}

.tag__badge--red {
  background: var(--color-challenge-red);
}

.tag__label {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-merit-blue);
}

.tag__label--red {
  color: var(--color-challenge-red);
}

.tag__text {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  color: var(--color-secondary);
  line-height: 1.57;
  text-align: left;
  padding-left: 32px;
}

/* ============================================
   Section 3: Flow Section
   ============================================ */
.flow-section {
  width: 100%;
  background: var(--color-accent-bg);
  padding: 80px 0;
}

.flow-section__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  padding: 0 24px;
}

.flow-section__intro {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  color: var(--color-secondary);
  letter-spacing: 0.8px;
  line-height: 1.75;
  text-align: center;
}

/* Flow Steps */
.flow-steps {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 800px;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 24px;
  width: 100%;
  background: var(--color-bg);
  border: 2px solid var(--color-footer-bg);
  border-radius: 24px;
  padding: 42px;
  box-shadow: 0 4px 3.5px rgba(0, 0, 0, 0.08);
}

.flow-step__number {
  width: 80px;
  height: 80px;
  background: #2a4ca1;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: #ffffff;
  flex-shrink: 0;
  box-shadow: 0 4px 5.25px -4px rgba(0, 0, 0, 0.1), 0 10px 13.125px -3px rgba(0, 0, 0, 0.1);
}

.flow-step__content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.flow-step__title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 1.1px;
  line-height: 1.5;
}

.flow-step__desc {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  color: var(--color-secondary);
  letter-spacing: 0.8px;
  line-height: 1.7;
}

.flow-step__connector {
  display: flex;
  justify-content: center;
  padding: 8px 0;
}

/* Flow CTA */
.flow-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 100%;
}

.flow-cta__text {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-secondary);
  letter-spacing: 0.8px;
  line-height: 1.67;
  text-align: center;
}

.flow-cta__note {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-primary);
  letter-spacing: 0.8px;
  text-align: center;
}

/* CTA Button (共通) */
.cta-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  width: 440px;
  height: 92px;
  background: var(--color-primary);
  border: 2px solid var(--color-primary);
  border-radius: 16px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  transition: opacity 0.3s ease;
}

.cta-button:hover {
  opacity: 0.9;
}

.cta-button span {
  font-family: var(--font-sans);
  font-size: 24px;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 2px;
  line-height: 1.17;
}

.cta-button__arrow {
  width: 32px;
  height: 31px;
  background: #e5f0f0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cta-button__arrow svg {
  width: 19px;
  height: 20px;
}

/* ============================================
   Section 4: Case Cards
   ============================================ */
.case-card {
  display: flex;
  border-radius: 20px;
  overflow: hidden;
  width: 100%;
}

.case-card__body {
  flex: 1;
  background: var(--color-accent-bg);
  padding: 40px 48px;
  border-radius: 20px 0 0 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.case-card__tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 28px;
  background: var(--color-footer-bg);
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  align-self: flex-start;
}

.case-card__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-secondary);
  letter-spacing: 0.8px;
  line-height: 1.4;
}

.case-card__text {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  color: var(--color-secondary);
  letter-spacing: 0.8px;
  line-height: 1.75;
}

.case-card__link {
  display: flex;
  align-items: center;
  gap: 8px;
  align-self: flex-end;
  padding-top: 20px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-secondary);
  letter-spacing: 0.8px;
  transition: gap 0.3s ease;
}

.case-card__link:hover {
  gap: 12px;
  color: var(--color-primary);
}

.case-card__image {
  width: 421px;
  flex-shrink: 0;
  border-radius: 0 20px 20px 0;
  min-height: 400px;
  overflow: hidden;
  position: relative;
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 16px;
}

.case-card__image img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.case-card__image-note {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  color: #ffffff;
  letter-spacing: 0.8px;
  position: relative;
  z-index: 1;
  white-space: nowrap;
}

/* Cases CTA */
.cases-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding-top: 20px;
}

.cases-cta__text {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 400;
  color: var(--color-secondary);
  letter-spacing: 0.8px;
  line-height: 1.67;
  text-align: center;
}

.cases-cta__note {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  color: var(--color-primary);
  letter-spacing: 0.8px;
  text-align: center;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  background: var(--color-footer-bg);
  width: 100%;
}

.footer__inner {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 79px;
  padding: 60px 40px 40px 40px;
}

.footer__contact {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
}

.footer__contact-title {
  font-family: var(--font-open);
  font-size: 20px;
  font-weight: 700;
  color: #333333;
  line-height: 1.8;
  padding-bottom: 15px;
  border-bottom: 1px solid #a0a3aa;
}

.footer__contact-info {
  display: flex;
  flex-direction: column;
}

.footer__contact-name {
  font-family: var(--font-open);
  font-size: 16px;
  font-weight: 400;
  color: #333333;
  line-height: 1.8;
}

.footer__contact-detail {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 400;
  color: #333333;
  line-height: 1.8;
}

.footer__copyright {
  font-family: var(--font-open);
  font-size: 16px;
  font-weight: 600;
  color: #110a51;
  line-height: 1.8;
}

/* ============================================
   Responsive
   ============================================ */

/* --- スマホ（767px以下）--- */
@media (max-width: 767px) {
  .page-hero__inner {
    padding: 40px 20px;
  }

  .page-hero__title {
    font-size: 36px;
    line-height: 1.2;
  }

  .page-hero__subtitle {
    font-size: 16px;
  }

  .main__inner {
    padding: 40px 16px;
    gap: 60px;
  }

  .intro-text {
    font-size: 14px;
    text-align: left;
  }

  .intro-text br {
    display: none;
  }

  .page-nav {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .page-nav__item {
    height: 72px;
    padding-left: 20px;
  }

  .page-nav__number {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  .page-nav__label {
    font-size: 14px;
  }

  .section-heading__title {
    font-size: 22px;
    letter-spacing: 1px;
  }

  .section-heading__en {
    font-size: 13px;
  }

  .info-banner {
    flex-direction: column;
  }

  .info-banner__text {
    border-radius: 20px 20px 0 0;
    padding: 32px 24px;
  }

  .info-banner__image {
    width: 100%;
    min-height: 200px;
    border-radius: 0 0 20px 20px;
  }

  .importance-box {
    padding: 24px 20px;
  }

  .importance-item__title {
    font-size: 18px;
  }

  .importance-item__text {
    font-size: 14px;
    padding: 0;
  }

  .type-cards {
    grid-template-columns: 1fr;
  }

  .type-card {
    padding: 24px;
  }

  .type-card__title {
    font-size: 20px;
  }

  .flow-section {
    padding: 40px 0;
  }

  .flow-section__inner {
    gap: 24px;
    padding: 0 16px;
  }

  .flow-section__intro {
    font-size: 14px;
    text-align: left;
  }

  .flow-step {
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px;
    gap: 16px;
  }

  .flow-step__number {
    width: 60px;
    height: 60px;
    font-size: 22px;
  }

  .flow-step__title {
    font-size: 18px;
  }

  .flow-step__desc {
    font-size: 14px;
  }

  .flow-cta__text {
    font-size: 14px;
  }

  .cta-button {
    width: 100%;
    max-width: 340px;
    height: 72px;
  }

  .cta-button span {
    font-size: 18px;
  }

  .case-card {
    flex-direction: column;
  }

  .case-card__body {
    border-radius: 20px 20px 0 0;
    padding: 24px 20px;
  }

  .case-card__image {
    width: 100%;
    min-height: 200px;
    border-radius: 0 0 20px 20px;
  }

  .case-card__title {
    font-size: 18px;
  }

  .case-card__text {
    font-size: 14px;
  }

  .footer__inner {
    padding: 40px 20px 30px;
    gap: 40px;
  }

  .footer__contact-title {
    font-size: 18px;
  }

  .footer__contact-name,
  .footer__contact-detail {
    font-size: 14px;
  }

  .footer__copyright {
    font-size: 14px;
  }
}

/* --- 中間サイズ（768px〜1023px）--- */
@media (min-width: 768px) and (max-width: 1023px) {
  .page-hero__title {
    font-size: 56px;
  }

  .page-hero__subtitle {
    font-size: 20px;
  }

  .section-heading__title {
    font-size: 28px;
  }

  .info-banner__image {
    width: 300px;
  }

  .case-card__image {
    width: 300px;
    padding: 12px;
  }

  .type-cards {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }
}

/* ============================================
   Back Button
   ============================================ */
.back-button-wrapper {
  padding: 40px 0;
  display: flex;
  justify-content: center;
}

.back-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 40px;
  border: 2px solid #0e508e;
  border-radius: 9999px;
  background: #ffffff;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.8px;
  line-height: 1.5;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.back-button:hover {
  background: var(--color-primary);
  color: #ffffff;
}

@media (max-width: 767px) {
  .back-button {
    width: 100%;
    font-size: 14px;
    padding: 14px 24px;
  }
}