/* ========================================
   About Page - Mission Section
   想いを伝えるヒーロー型ミッションセクション
   ======================================== */

/* --- Hero Statement Area --- */
.mission__hero {
  position: relative;
  overflow: hidden;
  padding: var(--spacing-20) 0 calc(var(--spacing-20) + 32px);
  text-align: center;
  background:
    radial-gradient(ellipse at 10% 0%, rgba(255, 215, 0, 0.12) 0%, transparent 40%),
    radial-gradient(ellipse at 90% 100%, rgba(255, 180, 50, 0.08) 0%, transparent 35%),
    linear-gradient(
      160deg,
      #FF4136 0%,
      #E8292C 20%,
      #C41230 45%,
      #A01025 70%,
      #8B1A2B 100%
    );
  color: var(--white);
}

.mission__hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 48px;
  background: var(--white);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
}

.mission__hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 48px;
  background: linear-gradient(180deg, transparent 0%, rgba(212, 168, 85, 0.6) 100%);
}

.mission__label {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(212, 168, 85, 0.9);
  margin-bottom: var(--spacing-8);
  padding-top: var(--spacing-8);
}

.mission__statement {
  max-width: 800px;
  margin: 0 auto var(--spacing-8);
}

.mission__statement p {
  font-size: clamp(1.375rem, 3.2vw, 2.25rem);
  font-weight: 700;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--white);
}

.mission__statement strong {
  font-weight: 900;
  position: relative;
  display: inline;
}

.mission__statement strong::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-gold) 0%, rgba(212, 168, 85, 0.3) 100%);
  border-radius: 2px;
}

.mission__sublead {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  line-height: 2;
  letter-spacing: 0.06em;
  max-width: 520px;
  margin: 0 auto;
}

/* --- Details Area (Vision & Mission Cards) --- */
.mission__details {
  padding: var(--spacing-16) 0;
  background: var(--white);
}

.mission__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-8);
  max-width: 960px;
  margin: 0 auto;
}

.mission__card {
  position: relative;
  padding: var(--spacing-10) var(--spacing-8);
  padding-left: calc(var(--spacing-8) + 4px);
  border: 1px solid var(--gray-100);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-xl);
  background: var(--white);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  overflow: hidden;
}

.mission__card:hover {
  border-color: transparent;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
}

.mission__card-subtitle {
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gray-500);
  margin: 0 0 var(--spacing-2);
  line-height: 1.4;
}

.mission__card-heading {
  font-size: clamp(1.875rem, 4.2vw, 2.75rem);
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  margin: 0 0 var(--spacing-5);
  line-height: 1.15;
}

.mission__card:hover .mission__card-heading {
  color: var(--primary-dark);
}

.mission__card-text {
  font-size: var(--font-size-sm);
  color: var(--gray-600);
  line-height: 2;
  letter-spacing: 0.02em;
}

/* ========================================
   Reason Section - なぜ活動しているのか
   ======================================== */
.about-reason {
  padding: var(--spacing-20) 0;
  background: var(--gray-50);
}

.about-reason__issues {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-16);
}

.about-reason__issue {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-10) var(--spacing-8);
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border-top: 4px solid transparent;
}

.about-reason__issue:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.08);
  border-top-color: var(--primary);
}

.about-reason__issue-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(232, 41, 44, 0.08);
  border-radius: var(--radius-lg);
  color: var(--primary);
}

.about-reason__issue-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-4);
  line-height: 1.4;
}

.about-reason__issue-text {
  font-size: var(--font-size-sm);
  color: var(--gray-600);
  line-height: 1.9;
}

.about-reason__message {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: var(--spacing-10) var(--spacing-8);
  background: var(--white);
  border-radius: var(--radius-xl);
  border-left: 4px solid var(--primary);
  box-shadow: var(--shadow-sm);
}

.about-reason__message-title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 0.08em;
  margin: 0 0 var(--spacing-6);
  line-height: 1.3;
}

.about-reason__message p {
  font-size: var(--font-size-base);
  color: var(--gray-700);
  line-height: 2;
  letter-spacing: 0.02em;
}

.about-reason__message p + p {
  margin-top: var(--spacing-6);
  font-weight: 600;
  color: var(--gray-900);
}

/* ========================================
   Business Section - 8事業紹介
   ======================================== */
.about-business {
  padding: var(--spacing-20) 0;
  background: var(--white);
}

.about-business__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-6);
  max-width: 1080px;
  margin: 0 auto;
}

.about-business__card {
  padding: var(--spacing-8);
  border-radius: var(--radius-xl);
  background: var(--gray-50);
  border-left: 4px solid var(--primary);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
}

.about-business__card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(232, 41, 44, 0.03) 0%, transparent 70%);
  pointer-events: none;
}

.about-business__card:nth-child(even) {
  border-left-color: var(--accent-gold);
}

.about-business__card:nth-child(even)::before {
  background: radial-gradient(circle, rgba(212, 168, 85, 0.04) 0%, transparent 70%);
}

.about-business__card:hover {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.07);
  transform: translateY(-3px);
}

.about-business__card-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-5);
}

.about-business__card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(232, 41, 44, 0.08);
  border-radius: var(--radius-lg);
  color: var(--primary);
  flex-shrink: 0;
}

.about-business__card:nth-child(even) .about-business__card-icon {
  background: rgba(212, 168, 85, 0.12);
  color: #9a7a30;
}

.about-business__card-info {
  flex: 1;
  min-width: 0;
}

.about-business__card-num {
  display: block;
  font-size: 0.625rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 2px;
}

.about-business__card:nth-child(even) .about-business__card-num {
  color: var(--accent-gold);
}

.about-business__card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.4;
}

.about-business__card-text {
  font-size: var(--font-size-sm);
  color: var(--gray-600);
  line-height: 1.9;
  letter-spacing: 0.02em;
}

.about-business__card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  margin-top: var(--spacing-4);
}

.about-business__tag {
  display: inline-block;
  font-size: var(--font-size-xs);
  color: var(--primary);
  background: rgba(232, 41, 44, 0.06);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-weight: 500;
}

.about-business__card:nth-child(even) .about-business__tag {
  color: #9a7a30;
  background: rgba(212, 168, 85, 0.1);
}

/* ========================================
   Ecosystem Section - つなぐ力
   ======================================== */
.about-ecosystem {
  position: relative;
  overflow: hidden;
}

.about-ecosystem__bg {
  padding: var(--spacing-20) 0;
  background:
    radial-gradient(ellipse at 10% 0%, rgba(255, 215, 0, 0.15) 0%, transparent 40%),
    radial-gradient(ellipse at 90% 20%, rgba(255, 180, 50, 0.10) 0%, transparent 35%),
    linear-gradient(
      135deg,
      #FF4136 0%,
      #E8292C 20%,
      #C41230 45%,
      #A01025 70%,
      #8B1A2B 100%
    );
  color: var(--white);
}

.about-ecosystem__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-12);
  align-items: center;
}

.about-ecosystem__diagram {
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-ecosystem__diagram img {
  max-width: 420px;
  width: 100%;
  height: auto;
  filter: brightness(0) invert(1) drop-shadow(0 4px 32px rgba(0, 0, 0, 0.3));
  opacity: 0.92;
}

.about-ecosystem__label {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-gold);
  margin-bottom: var(--spacing-6);
}

.about-ecosystem__title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 900;
  line-height: 1.4;
  margin-bottom: var(--spacing-8);
  letter-spacing: 0.02em;
}

.about-ecosystem__text {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: 2;
  letter-spacing: 0.04em;
}

.about-ecosystem__text + .about-ecosystem__text {
  margin-top: var(--spacing-5);
}

/* ========================================
   Core Competence Section - 強み
   ======================================== */
.about-strength {
  padding: var(--spacing-20) 0;
  background: var(--white);
}

.about-strength__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-8);
  max-width: 1080px;
  margin: 0 auto;
}

.about-strength__item {
  position: relative;
  padding: var(--spacing-10) var(--spacing-8);
  /* 番号（absolute / top: spacing-6 / 高さ ≈ spacing-10）の下に余白を確保し、見出しと被らないようにする */
  padding-top: calc(var(--spacing-6) + var(--spacing-10) + var(--spacing-4));
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  transition: all 0.4s ease;
  border-bottom: 3px solid transparent;
}

.about-strength__item:hover {
  background: var(--white);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.08);
  transform: translateY(-4px);
  border-bottom-color: var(--primary);
}

.about-strength__num {
  position: absolute;
  top: var(--spacing-6);
  left: var(--spacing-8);
  width: var(--spacing-10);
  height: var(--spacing-10);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  font-size: var(--font-size-lg);
  font-weight: 900;
  border-radius: var(--radius-md);
}

.about-strength__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.5;
  margin-bottom: var(--spacing-5);
}

.about-strength__text {
  font-size: var(--font-size-sm);
  color: var(--gray-600);
  line-height: 1.9;
}

/* ========================================
   How to Join Section - 参加方法
   ======================================== */
.about-join {
  padding: var(--spacing-20) 0;
  background: var(--gray-50);
}

.about-join__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-5);
  max-width: 960px;
  margin: 0 auto;
}

.about-join__card {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  padding: var(--spacing-5) var(--spacing-6);
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  transition: all 0.3s ease;
  text-decoration: none;
}

.about-join__card:hover {
  border-color: var(--primary);
  box-shadow: 0 8px 24px rgba(232, 41, 44, 0.08);
  transform: translateY(-2px);
}

.about-join__card--contact {
  border-color: var(--primary);
  background: rgba(232, 41, 44, 0.02);
}

.about-join__card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(232, 41, 44, 0.08);
  border-radius: var(--radius-md);
  color: var(--primary);
  flex-shrink: 0;
}

.about-join__card-title {
  flex: 1;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--gray-800);
}

.about-join__card-arrow {
  color: var(--gray-400);
  font-size: var(--font-size-sm);
  transition: color 0.2s ease, transform 0.2s ease;
}

.about-join__card:hover .about-join__card-arrow {
  color: var(--primary);
  transform: translateX(4px);
}

/* ========================================
   Organization Section - 運営会社
   ======================================== */
.about-org {
  padding: var(--spacing-20) 0;
  background: var(--white);
}

.about-org__table-wrap {
  max-width: 800px;
  margin: 0 auto;
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.about-org__table {
  width: 100%;
  border-collapse: collapse;
}

.about-org__table th,
.about-org__table td {
  padding: var(--spacing-5) var(--spacing-6);
  text-align: left;
  vertical-align: top;
}

.about-org__table th {
  width: 30%;
  font-weight: 600;
  color: var(--gray-600);
  background: var(--gray-50);
  font-size: var(--font-size-sm);
}

.about-org__table td {
  color: var(--gray-800);
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.about-org__table td small {
  color: var(--gray-500);
}

.about-org__table tr + tr th,
.about-org__table tr + tr td {
  border-top: 1px solid var(--gray-200);
}

/* 代表者行：役職 th が複数行のため、th/td とも行内で上下中央 */
.about-org__table tbody tr:nth-child(3) th,
.about-org__table tbody tr:nth-child(3) td {
  vertical-align: middle;
}

/* ========================================
   Utility
   ======================================== */
.sp-only {
  display: none;
}

/* ========================================
   Responsive - Tablet (768px)
   ======================================== */
@media (max-width: 768px) {
  .mission__hero {
    padding: var(--spacing-16) 0;
  }

  .mission__hero::before {
    height: 32px;
  }

  .mission__label {
    padding-top: var(--spacing-6);
    margin-bottom: var(--spacing-6);
  }

  .mission__statement p {
    font-size: 1.375rem;
    line-height: 1.8;
  }

  .mission__sublead {
    font-size: 0.8125rem;
  }

  .mission__details {
    padding: var(--spacing-12) 0;
  }

  .mission__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    max-width: 520px;
  }

  .mission__card {
    padding: var(--spacing-8) var(--spacing-6);
  }

  .mission__card-heading {
    font-size: clamp(1.625rem, 5vw, 2.25rem);
  }

  .mission__card-text br {
    display: none;
  }

  /* Reason */
  .about-reason {
    padding: var(--spacing-16) 0;
  }

  .about-reason__issues {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }

  .about-reason__message {
    padding: var(--spacing-8) var(--spacing-6);
  }

  /* Business */
  .about-business {
    padding: var(--spacing-16) 0;
  }

  .about-business__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-5);
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }

  .about-business__card {
    padding: var(--spacing-6);
  }

  /* Ecosystem */
  .about-ecosystem__bg {
    padding: var(--spacing-16) 0;
  }

  .about-ecosystem__inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-10);
    text-align: center;
  }

  .about-ecosystem__diagram {
    order: -1;
  }

  .about-ecosystem__diagram img {
    max-width: 300px;
  }

  /* Strength */
  .about-strength {
    padding: var(--spacing-16) 0;
  }

  .about-strength__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }

  .about-strength__title br {
    display: none;
  }

  /* Join */
  .about-join {
    padding: var(--spacing-16) 0;
  }

  .about-join__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
  }

  /* Organization */
  .about-org {
    padding: var(--spacing-16) 0;
  }

  .about-org__table th,
  .about-org__table td {
    padding: var(--spacing-4) var(--spacing-5);
  }

  .sp-only {
    display: inline;
  }
}

/* ========================================
   Responsive - Small Mobile (480px)
   ======================================== */
@media (max-width: 480px) {
  .mission__hero {
    padding: var(--spacing-12) 0;
  }

  .mission__hero::before {
    height: 24px;
  }

  .mission__label {
    padding-top: var(--spacing-4);
    margin-bottom: var(--spacing-5);
    font-size: 0.625rem;
  }

  .mission__statement {
    margin-bottom: var(--spacing-6);
  }

  .mission__statement p {
    font-size: 1.125rem;
  }

  .mission__sublead {
    font-size: 0.75rem;
  }

  .mission__sublead br {
    display: none;
  }

  .mission__details {
    padding: var(--spacing-10) 0;
  }

  .mission__card {
    padding: var(--spacing-6) var(--spacing-5);
  }

  .mission__card-heading {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-4);
  }

  .about-reason__message-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-5);
  }

  .mission__card-text {
    font-size: 0.8125rem;
    line-height: 1.8;
  }

  /* Reason */
  .about-reason {
    padding: var(--spacing-12) 0;
  }

  .about-reason__issue {
    padding: var(--spacing-8) var(--spacing-6);
  }

  .about-reason__message p br {
    display: none;
  }

  /* Business */
  .about-business {
    padding: var(--spacing-12) 0;
  }

  .about-business__card {
    padding: var(--spacing-5);
  }

  .about-business__card-icon {
    width: 40px;
    height: 40px;
  }

  .about-business__card-title {
    font-size: var(--font-size-base);
  }

  .about-business__card-text {
    font-size: 0.8125rem;
  }

  /* Ecosystem */
  .about-ecosystem__bg {
    padding: var(--spacing-12) 0;
  }

  .about-ecosystem__diagram img {
    max-width: 240px;
  }

  .about-ecosystem__title {
    font-size: 1.5rem;
  }

  /* Strength */
  .about-strength {
    padding: var(--spacing-12) 0;
  }

  .about-strength__item {
    padding: var(--spacing-8) var(--spacing-6);
    padding-top: calc(var(--spacing-6) + var(--spacing-10) + var(--spacing-4));
  }

  .about-strength__title {
    font-size: var(--font-size-lg);
  }

  /* Join */
  .about-join {
    padding: var(--spacing-12) 0;
  }

  .about-join__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-3);
  }

  /* Organization */
  .about-org {
    padding: var(--spacing-12) 0;
  }

  .about-org__table th {
    width: 35%;
    font-size: var(--font-size-xs);
  }

  .about-org__table td {
    font-size: var(--font-size-xs);
  }
}