/* ========== Business Hero ========== */
.business-hero {
  position: relative;
  width: 100%;
  min-height: 550px;
  padding-top: 70px;
  overflow: hidden;
  background-color: #050a18;
  display: flex;
  flex-direction: column;
}

.business-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.business-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.business-hero__overlay {
  display: none;
}

.business-hero__inner {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.business-hero__content {
  text-align: center;
  color: #fff;
}

.business-hero__title {
  font-family: "Source Han Serif JP", serif;
  font-size: 36px;
  font-weight: 400;
  letter-spacing: 0.02em;
  margin: 0 0 20px;
  line-height: 1;
  color: #fff;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.business-hero__sub {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 14px;
  line-height: 1.9;
  letter-spacing: 0.05em;
  margin: 0;
  color: rgba(255, 255, 255, 0.88);
}

/* ヒーロー内ナビ */
.business-hero__nav {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  display: flex;
  justify-content: center;
  gap: 0;
  background: transparent;
}

.business-hero__nav-item {
  flex: 0 1 auto;
  min-width: 160px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 12px;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 13px;
  font-weight: 400;
  color: #000;
  background: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: background 0.3s, color 0.3s;
  border-left: 1px solid rgba(255, 255, 255, 0.15);
}

.business-hero__nav-item:first-child {
  border-left: none;
}

.business-hero__nav-item:hover {
  background: rgba(255, 255, 255, 0.3);
  color: #fff;
}

.business-hero__nav-item.is-active {
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
}

/* ========== Business Detail (講座事業 詳細) ========== */
.business-detail {
  background: #fff;
  color: #15181c;
  scroll-margin-top: 80px;
  overflow: hidden;
}

.business-detail__inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 0;
  align-items: stretch;
}

.business-detail__text {
  padding: 80px 60px 80px 80px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.business-detail__label {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 8px;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: #136db6;
  letter-spacing: 0.08em;
  margin: 0 0 22px;
}

.business-detail__label::before {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 3px solid #136db6;
  background: transparent;
  position: relative;
  animation: business-detail-label-pulse 2.4s ease-out infinite;
}

@keyframes business-detail-label-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(19, 109, 182, 0.55);
  }
  70% {
    box-shadow: 0 0 0 6px rgba(19, 109, 182, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(19, 109, 182, 0);
  }
}

.business-detail__heading {
  font-family: "Noto Serif JP", "Source Han Serif JP", serif;
  font-size: 32px;
  font-weight: 600;
  color: #15181c;
  margin: 0 0 28px;
  letter-spacing: 0.06em;
  line-height: 1.55;
}

.business-detail__desc {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 15px;
  line-height: 2.05;
  color: #2a2a2a;
  margin: 0 0 36px;
  letter-spacing: 0.02em;
}

.business-detail__btn {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  gap: 14px;
  padding: 14px 32px;
  background: #15181c;
  border: 1px solid #15181c;
  color: #fff;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: 0.08em;
  transition: background 0.2s, border-color 0.2s;
}

.business-detail__btn:hover {
  background: #2a3a64;
  border-color: #2a3a64;
}

.business-detail__btn-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* 画像（左辺を斜めにカット） */
.business-detail__image {
  position: relative;
  min-height: 100%;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 80px 100%);
}

.business-detail__image img {
  display: block;
  margin: 90px 0;
  width: 100%;
  height: 70%;
  object-fit: cover;
}

/* 画像を左、テキストを右に反転（左の画像は右辺を斜めカット） */
.business-detail--reverse .business-detail__inner {
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
}

.business-detail--reverse .business-detail__image {
  grid-column: 1;
  grid-row: 1;
  clip-path: polygon(0 0, 100% 0, calc(100% - 80px) 100%, 0 100%);
}

.business-detail--reverse .business-detail__text {
  grid-column: 2;
  grid-row: 1;
  padding: 80px 80px 80px 60px;
}

/* ========== コミュニティ運営 ========== */
.business-community {
  background: #fff;
  padding: 90px 24px 100px;
  scroll-margin-top: 80px;
}

.business-community__inner {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
}

.business-community__label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: #136db6;
  letter-spacing: 0.08em;
}

.business-community__label-dot {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 3px solid #136db6;
  background: transparent;
  position: relative;
  animation: business-detail-label-pulse 2.4s ease-out infinite;
}

.business-community__heading {
  font-family: "Noto Serif JP", "Source Han Serif JP", serif;
  font-size: 28px;
  font-weight: 600;
  color: #15181c;
  margin: 0 0 48px;
  letter-spacing: 0.06em;
  line-height: 1.6;
}

.business-community__image {
  margin: 0 0 36px;
}

.business-community__image img {
  display: block;
  width: 100%;
  height: auto;
}

.business-community__body {
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 13px;
  line-height: 2.05;
  color: #2a2a2a;
  letter-spacing: 0.03em;
}

.business-community__body p {
  margin: 0 0 14px;
}

.business-community__body p:last-child {
  margin-bottom: 0;
}

/* ========== Business Section ========== */
.business-section {
  background: #fff;
  padding: 90px 24px 100px;
  color: #15181c;
}

.business-section--alt {
  background: #f5f6f8;
}

.business-section__inner {
  max-width: 1100px;
  margin: 0 auto;
}

.business-section__head {
  text-align: center;
  margin-bottom: 28px;
}

.business-section__heading {
  display: inline-block;
  font-family: "Noto Serif JP", "Source Han Serif JP", serif;
  font-size: 22px;
  font-weight: 600;
  color: #15181c;
  margin: 0;
  padding-bottom: 12px;
  position: relative;
  letter-spacing: 0.08em;
}

.business-section__heading::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 36px;
  height: 1px;
  background: #136db6;
}

.business-section__catch {
  font-family: "Noto Serif JP", "Source Han Serif JP", serif;
  font-size: 22px;
  font-weight: 600;
  color: #15181c;
  text-align: center;
  margin: 0 0 36px;
  letter-spacing: 0.05em;
  line-height: 1.6;
}

.business-section__body {
  max-width: 760px;
  margin: 0 auto 48px;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 13px;
  line-height: 1.95;
  color: #2a2a2a;
  letter-spacing: 0.03em;
}

.business-section__body p {
  margin: 0;
}

/* カードリスト */
.business-section__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.business-card {
  background: #fff;
  border: 1px solid #e0e3eb;
  padding: 28px 24px;
}

.business-section--alt .business-card {
  background: #fff;
}

.business-card__title {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 16px;
  font-weight: 600;
  color: #1f2c4d;
  margin: 0 0 14px;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

.business-card__desc {
  font-family: "Noto Sans JP", sans-serif;
  font-size: 13px;
  line-height: 1.95;
  color: #2a2a2a;
  margin: 0;
  letter-spacing: 0.03em;
}

/* ========== Responsive ========== */
@media screen and (max-width: 1024px) {
  .business-hero {
    min-height: 420px;
  }

  .business-hero__title {
    font-size: 40px;
  }

  .business-section {
    padding: 72px 24px 80px;
  }

  .business-section__list {
    gap: 18px;
  }

  .business-detail__inner,
  .business-detail--reverse .business-detail__inner {
    grid-template-columns: 1fr;
  }

  .business-detail__text,
  .business-detail--reverse .business-detail__text {
    padding: 56px 32px;
    grid-column: 1;
    grid-row: auto;
    order: 0;
    align-items: center;
    text-align: center;
  }

  .business-detail__text .business-detail__label,
  .business-detail__text .business-detail__btn {
    align-self: center;
  }

  .business-detail__text .business-detail__desc,
  .business-community__body {
    text-align: left;
  }

  .business-detail__image,
  .business-detail--reverse .business-detail__image {
    grid-column: 1;
    grid-row: auto;
    order: 1;
    min-height: 0;
    clip-path: none;
  }

  .business-detail__image img {
    margin: 0;
    width: 95%;
    height: auto;
  }

  .business-detail--reverse .business-detail__image img {
    margin-left: auto;
    margin-right: 0;
  }

  .business-detail__heading {
    font-size: 26px;
  }

  .business-community {
    padding: 72px 24px 80px;
  }

  .business-community__heading {
    font-size: 24px;
  }
}

@media screen and (max-width: 768px) {
  .business-hero {
    min-height: 380px;
  }

  .business-hero__inner {
    padding: 20px;
  }

  .business-hero__title {
    font-size: 32px;
  }

  .business-hero__sub {
    font-size: 13px;
  }

  .business-hero__sub br {
    display: none;
  }

  .business-hero__nav {
    overflow-x: auto;
    scrollbar-width: none;
  }

  .business-hero__nav::-webkit-scrollbar {
    display: none;
  }

  .business-hero__nav-item {
    flex: 0 0 auto;
    padding: 12px 16px;
    font-size: 12px;
  }

  .business-section {
    padding: 56px 20px 56px;
  }

  .business-detail__text {
    padding: 40px 20px;
  }

  .business-detail__heading {
    font-size: 22px;
  }

  .business-detail__image {
    min-height: 240px;
  }

  .business-detail__btn {
    padding: 13px 22px;
    font-size: 12px;
  }

  .business-community {
    padding: 56px 20px 56px;
  }

  .business-community__heading {
    font-size: 20px;
  }

  .business-community__body {
    text-align: left;
    font-size: 13px;
  }

  .business-section__heading {
    font-size: 19px;
  }

  .business-section__catch {
    font-size: 17px;
  }

  .business-section__body {
    margin-bottom: 32px;
  }

  .business-section__list {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .business-card {
    padding: 22px 20px;
  }
}