/* ===========================================
   CSR / Overseas Support — Sponsorship Program
   - 大型フォトギャラリー（3枚）
   - 3ステップ：アイコン+番号+ホバーリフト+フローライン
   - ブランド掲示カード：回転リング+グロー+バレットアニメ
   =========================================== */

.csr {
  background-color: var(--color-bg-soft);
  position: relative;
  overflow-x: clip;
}

/* 背景装飾：柔らかい光のブロブ */
.csr::before {
  content: '';
  position: absolute;
  top: 8%;
  right: -8%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 190, 240, 0.10) 0%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
  animation: csrBlobFloat 22s ease-in-out infinite;
}

.csr::after {
  content: '';
  position: absolute;
  bottom: 8%;
  left: -8%;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(179, 210, 53, 0.08) 0%, transparent 70%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
  animation: csrBlobFloat 28s ease-in-out infinite -8s;
}

@keyframes csrBlobFloat {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(-30px, 25px); }
}

.csr > .container {
  position: relative;
  z-index: 1;
}

/* ============================================================
   フォトギャラリー（3枚）
   ============================================================ */
.csr__photos {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-5);
  margin-bottom: var(--space-6);
}

@media (min-width: 768px) {
  .csr__photos {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
  }
}

@media (min-width: 1024px) {
  .csr__photos {
    gap: var(--space-4);
    margin-bottom: var(--space-8);
  }
}

.csr__photo {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  box-shadow:
    0 16px 40px rgba(0, 99, 138, 0.12),
    0 4px 12px rgba(0, 99, 138, 0.06);
  transition: transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out);
}

.csr__photo:hover {
  transform: translateY(-4px);
  box-shadow:
    0 24px 48px rgba(0, 99, 138, 0.18),
    0 8px 16px rgba(0, 99, 138, 0.08);
}

.csr__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 8s ease-out;
}

.csr__photo:hover img {
  transform: scale(1.04);
}

.csr__photo-cap {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-3);
  background: linear-gradient(180deg,
    transparent 0%,
    transparent 40%,
    rgba(0, 30, 50, 0.65) 80%,
    rgba(0, 30, 50, 0.85) 100%);
  color: var(--color-base);
  margin: 0;
}

@media (min-width: 768px) {
  .csr__photo-cap {
    padding: var(--space-4);
  }
}

.csr__photo-cap-sub {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 0.25rem;
}

@media (min-width: 768px) {
  .csr__photo-cap-sub {
    font-size: 0.8125rem;
  }
}

.csr__photo-cap-main {
  font-family: var(--font-heading);
  font-size: clamp(1.125rem, 2.6vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-base);
  line-height: 1.2;
}

/* ============================================================
   スポンサーシップ・モデル（3ステップ）— こだわり演出
   ============================================================ */
.csr__model {
  margin-top: var(--space-6);
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(34, 190, 240, 0.08) 0%, transparent 60%),
    rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(0, 99, 138, 0.08);
  border-radius: var(--radius-xl);
  padding: var(--space-4);
  box-shadow:
    0 16px 40px rgba(0, 99, 138, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}

@media (min-width: 768px) {
  .csr__model {
    padding: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .csr__model {
    padding: var(--space-8);
  }
}

.csr__model-title {
  font-family: var(--font-heading);
  font-size: clamp(1.375rem, 2.6vw, 1.875rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-2);
  text-align: center;
}

.csr__model-lead {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--color-text-sub);
  text-align: center;
  max-width: 60ch;
  margin: 0 auto var(--space-5);
}

@media (min-width: 768px) {
  .csr__model-lead {
    font-size: 1rem;
  }
}

.csr__steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: csr-step;
}

@media (min-width: 768px) {
  .csr__steps {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
    position: relative;
  }
}

@media (min-width: 1024px) {
  .csr__steps {
    gap: var(--space-4);
  }
}

/* 個別ステップカード */
.csr__step {
  position: relative;
  padding: var(--space-5) var(--space-4) var(--space-4);
  background: linear-gradient(160deg,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(245, 250, 252, 0.92) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(34, 190, 240, 0.18);
  box-shadow:
    0 4px 18px rgba(0, 99, 138, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.95);
  transition:
    transform 0.5s var(--ease-out),
    box-shadow 0.5s var(--ease-out),
    border-color 0.3s var(--ease-out);
  overflow: hidden;
}

/* カード右上の装飾的なアクセント光 */
.csr__step::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(179, 210, 53, 0.20) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  transition: transform 0.6s var(--ease-out), opacity 0.4s var(--ease-out);
  opacity: 0.5;
}

.csr__step:hover {
  transform: translateY(-8px);
  box-shadow:
    0 28px 56px rgba(0, 99, 138, 0.18),
    0 8px 20px rgba(34, 190, 240, 0.10),
    inset 0 1px 0 rgba(255, 255, 255, 0.98);
  border-color: rgba(34, 190, 240, 0.45);
}

.csr__step:hover::before {
  transform: scale(1.6);
  opacity: 1;
}

/* デスクトップ：各ステップ右側の装飾ライン（3番目まで一貫表示） */
@media (min-width: 768px) {
  .csr__steps .csr__step::after {
    content: '';
    position: absolute;
    top: 56px;
    right: -16px;
    width: 32px;
    height: 2px;
    background:
      radial-gradient(circle 4px at var(--flow-x, 0%) 50%, rgba(255, 255, 255, 0.95), transparent 60%),
      linear-gradient(90deg, rgba(34, 190, 240, 0.55) 0%, rgba(34, 190, 240, 0.10) 100%);
    border-radius: 2px;
    z-index: 2;
    animation: csrFlowDot 2.4s ease-in-out infinite;
  }

  /* 各ステップで光点アニメに少しディレイをずらして自然な流れに */
  .csr__steps .csr__step:nth-child(2)::after {
    animation-delay: -0.8s;
  }

  .csr__steps .csr__step:nth-child(3)::after {
    animation-delay: -1.6s;
  }

  /* 最後のステップ(03)：長さは他と同じだが終端を完全フェードアウトで自然に */
  .csr__steps .csr__step:last-child::after {
    background:
      radial-gradient(circle 4px at var(--flow-x, 0%) 50%, rgba(255, 255, 255, 0.95), transparent 60%),
      linear-gradient(90deg, rgba(34, 190, 240, 0.55) 0%, rgba(34, 190, 240, 0.0) 100%);
  }

  @keyframes csrFlowDot {
    0% { --flow-x: 0%; background-position: 0% 50%, 0 0; }
    100% { --flow-x: 100%; background-position: 100% 50%, 0 0; }
  }
}

/* アイコン（カード上部） */
.csr__step-icon {
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg,
    rgba(34, 190, 240, 0.18) 0%,
    rgba(0, 99, 138, 0.10) 100%);
  border-radius: 18px;
  color: var(--color-text);
  position: relative;
  transition:
    transform 0.5s var(--ease-out),
    background 0.3s var(--ease-out),
    box-shadow 0.4s var(--ease-out);
  animation: csrIconFloat 6s ease-in-out infinite;
  box-shadow: 0 6px 16px rgba(34, 190, 240, 0.12);
}

.csr__step:nth-child(2) .csr__step-icon {
  animation-delay: -2s;
}

.csr__step:nth-child(3) .csr__step-icon {
  animation-delay: -4s;
}

.csr__step:hover .csr__step-icon {
  transform: scale(1.08) rotate(-4deg);
  background: linear-gradient(135deg,
    rgba(34, 190, 240, 0.28) 0%,
    rgba(0, 99, 138, 0.18) 100%);
  box-shadow: 0 12px 28px rgba(34, 190, 240, 0.25);
}

.csr__step-icon svg {
  width: 38px;
  height: 38px;
  stroke: var(--color-text);
  transition: stroke 0.3s var(--ease-out);
}

.csr__step:hover .csr__step-icon svg {
  stroke: var(--color-accent-sky);
}

@keyframes csrIconFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33% { transform: translateY(-3px) rotate(1deg); }
  66% { transform: translateY(-1px) rotate(-1deg); }
}

/* 番号バッジ（右上に絶対配置） */
.csr__step-num {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00638A 0%, #007AAB 100%);
  color: var(--color-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  margin: 0;
  box-shadow:
    0 4px 12px rgba(0, 99, 138, 0.30),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
  z-index: 3;
}

/* 番号バッジの脈打つグロウリング */
.csr__step-num::before {
  content: '';
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 2px solid rgba(34, 190, 240, 0.45);
  animation: csrPulse 2.6s ease-out infinite;
  pointer-events: none;
}

.csr__step:nth-child(2) .csr__step-num::before {
  animation-delay: -0.9s;
}

.csr__step:nth-child(3) .csr__step-num::before {
  animation-delay: -1.7s;
}

@keyframes csrPulse {
  0% {
    transform: scale(1);
    opacity: 0.85;
  }
  70% {
    opacity: 0;
  }
  100% {
    transform: scale(1.6);
    opacity: 0;
  }
}

/* ステップタイトル */
.csr__step-title {
  font-family: var(--font-heading);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin: 0 0 0.5rem;
}

@media (min-width: 768px) {
  .csr__step-title {
    font-size: 1.125rem;
  }
}

.csr__step-text {
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--color-text-sub);
  margin: 0;
}

/* ============================================================
   ブランド掲示の付加価値カード — こだわり演出
   ============================================================ */
.csr__brand {
  position: relative;
  margin-top: var(--space-5);
  padding: var(--space-5) var(--space-4);
  background:
    radial-gradient(ellipse 60% 80% at 0% 50%, rgba(179, 210, 53, 0.20) 0%, transparent 70%),
    linear-gradient(135deg, rgba(179, 210, 53, 0.10) 0%, rgba(34, 190, 240, 0.06) 100%);
  border: 1px solid rgba(179, 210, 53, 0.32);
  border-radius: var(--radius-xl);
  display: grid;
  grid-template-columns: 1fr;
  grid-template-areas:
    "icon"
    "body"
    "visual";
  gap: var(--space-3);
  overflow: hidden;
  box-shadow:
    0 16px 40px rgba(0, 99, 138, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
}

@media (min-width: 768px) {
  .csr__brand {
    padding: var(--space-5);
    grid-template-columns: auto 1fr;
    grid-template-areas:
      "icon body"
      "visual visual";
    align-items: start;
    gap: var(--space-3) var(--space-4);
  }
}

@media (min-width: 1024px) {
  .csr__brand {
    padding: var(--space-6);
    margin-top: var(--space-6);
    grid-template-columns: auto 1fr 320px;
    grid-template-areas: "icon body visual";
    gap: var(--space-5);
  }
}

/* グリッドエリア割り当て */
.csr__brand-icon { grid-area: icon; }
.csr__brand-body { grid-area: body; }
.csr__brand-visual { grid-area: visual; }

.csr__brand:hover {
  transform: translateY(-3px);
  box-shadow:
    0 24px 56px rgba(179, 210, 53, 0.16),
    0 8px 16px rgba(34, 190, 240, 0.08);
}

/* 背景でゆっくり回転するグロウ */
.csr__brand-glow {
  position: absolute;
  top: -30%;
  right: -20%;
  width: 60%;
  height: 160%;
  background: radial-gradient(ellipse at center, rgba(34, 190, 240, 0.18) 0%, transparent 60%);
  filter: blur(30px);
  pointer-events: none;
  z-index: 0;
  animation: csrGlowOrbit 18s linear infinite;
}

@keyframes csrGlowOrbit {
  0% { transform: rotate(0deg) translateX(0) rotate(0deg); }
  100% { transform: rotate(360deg) translateX(0) rotate(-360deg); }
}

/* アイコン本体 */
.csr__brand-icon {
  position: relative;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  background: linear-gradient(135deg, #B3D235, #9BB832);
  color: var(--color-text);
  flex-shrink: 0;
  box-shadow:
    0 12px 28px rgba(179, 210, 53, 0.40),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
  z-index: 1;
  align-self: center;
  transition: transform 0.5s var(--ease-out);
}

@media (min-width: 768px) {
  .csr__brand-icon {
    width: 72px;
    height: 72px;
    align-self: flex-start;
  }
}

@media (min-width: 1024px) {
  .csr__brand-icon {
    width: 88px;
    height: 88px;
  }
}

.csr__brand:hover .csr__brand-icon {
  transform: scale(1.05) rotate(-6deg);
}

.csr__brand-icon svg {
  width: 32px;
  height: 32px;
  position: relative;
  z-index: 2;
}

@media (min-width: 768px) {
  .csr__brand-icon svg {
    width: 36px;
    height: 36px;
  }
}

@media (min-width: 1024px) {
  .csr__brand-icon svg {
    width: 44px;
    height: 44px;
  }
}

/* アイコンの周りで回転するリング装飾 */
.csr__brand-icon-ring {
  position: absolute;
  inset: -8px;
  border-radius: 22px;
  border: 2px dashed rgba(179, 210, 53, 0.7);
  animation: csrRingRotate 12s linear infinite;
  pointer-events: none;
}

@media (min-width: 1024px) {
  .csr__brand-icon-ring {
    inset: -10px;
    border-radius: 26px;
  }
}

@keyframes csrRingRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.csr__brand-body {
  flex: 1;
  position: relative;
  z-index: 1;
}

.csr__brand-eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text);
  background: rgba(179, 210, 53, 0.30);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(179, 210, 53, 0.50);
  margin-bottom: 0.625rem;
}

.csr__brand-title {
  font-family: var(--font-heading);
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin: 0 0 0.625rem;
  line-height: 1.35;
}

.csr__brand-text {
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--color-text-sub);
  margin: 0 0 var(--space-3);
}

.csr__brand-text strong {
  color: var(--color-text);
  font-weight: 700;
}

/* バレットリスト（特典） */
.csr__brand-bullets {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.csr__brand-bullets li {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--color-text);
  font-weight: 500;
}

.csr__brand-bullet-dot {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border-radius: 50%;
  background: linear-gradient(135deg, #B3D235, #9BB832);
  position: relative;
  box-shadow: 0 2px 6px rgba(179, 210, 53, 0.4);
}

.csr__brand-bullet-dot::before {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
}

.csr__brand-bullet-dot::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid rgba(179, 210, 53, 0.4);
  animation: csrBulletPulse 2.8s ease-out infinite;
}

.csr__brand-bullets li:nth-child(2) .csr__brand-bullet-dot::after {
  animation-delay: -0.95s;
}

.csr__brand-bullets li:nth-child(3) .csr__brand-bullet-dot::after {
  animation-delay: -1.85s;
}

@keyframes csrBulletPulse {
  0% {
    transform: scale(1);
    opacity: 0.8;
  }
  70% {
    opacity: 0;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

/* ============================================================
   右側ビジュアル（実機 + ロゴ刻印イメージ）
   ============================================================ */
.csr__brand-visual {
  position: relative;
  margin: 0;
  z-index: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #FFFFFF;
  border: 1px solid rgba(34, 190, 240, 0.20);
  box-shadow:
    0 16px 36px rgba(0, 99, 138, 0.12),
    0 4px 12px rgba(0, 99, 138, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
  display: flex;
  align-items: center;
  justify-content: center;
}

.csr__brand-visual:hover {
  transform: translateY(-3px);
  box-shadow:
    0 24px 48px rgba(0, 99, 138, 0.18),
    0 8px 16px rgba(0, 99, 138, 0.08);
}

.csr__brand-visual picture {
  display: block;
  width: 100%;
}

.csr__brand-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: contain;
  transition: transform 8s ease-out;
}

.csr__brand-visual:hover img {
  transform: scale(1.03);
}

@media (min-width: 768px) {
  .csr__brand-visual {
    max-width: 360px;
    margin-inline: auto;
  }
}

@media (min-width: 1024px) {
  .csr__brand-visual {
    max-width: none;
    margin: 0;
    align-self: stretch;
  }
}

/* ============================================================
   注釈・CTA
   ============================================================ */
.csr__note {
  margin-top: var(--space-4);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.7;
}

@media (min-width: 768px) {
  .csr__note {
    font-size: var(--fs-small);
  }
}

.csr__cta {
  display: flex;
  justify-content: center;
  margin-top: var(--space-4);
}

@media (min-width: 768px) {
  .csr__cta {
    margin-top: var(--space-5);
  }
}

.csr__cta .btn svg {
  transition: transform var(--duration-base) var(--ease-out);
}

.csr__cta .btn:hover svg {
  transform: translateX(4px);
}

/* ============================================================
   Reduced Motion — すべてのアニメ停止
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .csr::before,
  .csr::after,
  .csr__photo,
  .csr__photo img,
  .csr__step,
  .csr__step-icon,
  .csr__step-num::before,
  .csr__steps .csr__step:not(:last-child)::after,
  .csr__brand,
  .csr__brand-glow,
  .csr__brand-icon,
  .csr__brand-icon-ring,
  .csr__brand-bullet-dot::after,
  .csr__cta .btn svg {
    animation: none !important;
    transition: none !important;
  }
}