/* ===================================
   Orchestra AI 専用テーマ v2
   - 高級感のあるB2Bエンタープライズデザイン
   - ガラスモーフィズム、グロウ、ノイズ、メッシュグラデ
   =================================== */

/* === グローバル微調整 === */
body {
  font-feature-settings: "palt";
  background: var(--color-bg);
}

/* スクリーンリーダー専用 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* SVGアイコン共通 */
.icon {
  display: inline-block;
  width: 1.5em;
  height: 1.5em;
  flex-shrink: 0;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* === セクション見出し === */
.section {
  position: relative;
}

.section-heading {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-heading__en {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-heading__en::before,
.section-heading__en::after {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.4;
}

.section-heading__ja {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.4;
  color: var(--color-primary);
}

.section-heading__sub {
  display: block;
  max-width: 640px;
  margin: var(--space-sm) auto 0;
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-secondary);
  letter-spacing: 0.04em;
  line-height: 2;
}

/* === ヘッダー === */
.header__logo-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: 0.06em;
  color: inherit;
  text-decoration: none;
}

.header__logo-icon {
  width: 28px;
  height: 28px;
  display: block;
}

.header__logo-img {
  display: block;
  height: 28px;
  width: auto;
}

@media (max-width: 480px) {
  .header__logo-img {
    height: 22px;
  }
}

.footer__logo-img {
  display: block;
  height: 22px;
  width: auto;
}

.header--on-hero {
  background: transparent;
  backdrop-filter: none;
  box-shadow: none;
}

.header--on-hero .header__logo-mark,
.header--on-hero .header__menu a:not(.btn) {
  color: #fff;
}

.header--on-hero .hamburger__line {
  background: #fff;
}

.header--scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 rgba(20, 30, 60, 0.06);
}

.header--scrolled .header__logo-mark,
.header--scrolled .header__menu a:not(.btn) {
  color: var(--color-primary);
}

.header--scrolled .hamburger__line {
  background: var(--color-primary);
}

.header__menu a:not(.btn) {
  position: relative;
  font-weight: 500;
  transition: opacity 0.2s;
}

.header__menu a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.header__menu a:not(.btn):hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* === ボタン (override) === */
.btn {
  position: relative;
  padding: 1em 2em;
  font-weight: 600;
  letter-spacing: 0.08em;
  border-radius: 999px;
  font-family: inherit;
  transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  isolation: isolate;
  overflow: hidden;
}

.btn--lg {
  padding: 1.1em 2.5em;
  font-size: 0.95rem;
}

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px -8px rgba(30, 91, 255, 0.6);
}

.btn--primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #1e5bff 0%, #4a7fff 50%, #1e5bff 100%);
  background-size: 200% 200%;
  background-position: 0% 50%;
  transition: background-position 0.5s ease;
  z-index: -1;
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -12px rgba(30, 91, 255, 0.8);
  opacity: 1;
}

.btn--primary:hover::before {
  background-position: 100% 50%;
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(8px);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
  opacity: 1;
}

.btn__arrow {
  display: inline-block;
  width: 1em;
  height: 1em;
  margin-left: 0.2em;
  transition: transform 0.3s;
}

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

/* === ヒーロー（画像のみ） === */
.hero {
  position: relative;
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  overflow: hidden;
}

.hero__image {
  display: block;
  width: 100%;
  max-width: 1600px;
  height: auto;
  margin-inline: auto;
  object-fit: contain;
  /* 両端を背景色(白)へなめらかにフェード */
  -webkit-mask-image: linear-gradient(
    90deg,
    transparent 0%,
    #000 8%,
    #000 92%,
    transparent 100%
  );
  mask-image: linear-gradient(
    90deg,
    transparent 0%,
    #000 8%,
    #000 92%,
    transparent 100%
  );
  animation: heroImgIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes heroImgIn {
  from { opacity: 0; filter: blur(6px); }
  to   { opacity: 1; filter: blur(0); }
}

/* === コンセプトフロー（ヒーロー直下の図） === */
.concept-flow {
  padding-block: var(--space-lg);
  background: #fcfcfe;
}

.concept-flow .container {
  max-width: 1280px;
}

.concept-flow__image {
  display: block;
  width: 100%;
  height: auto;
  max-width: 1200px;
  margin-inline: auto;
}

@media (max-width: 767px) {
  .concept-flow {
    padding-block: var(--space-md);
  }
}

/* === 共通: セクションのノイズ/エフェクト === */
.section--alt {
  background: linear-gradient(180deg, #f7f8fc 0%, #f0f3fa 100%);
  position: relative;
}

.section-divider {
  width: 64px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
  margin: 0 auto var(--space-md);
  border-radius: 999px;
}

/* === 課題 (Problem) === */
.problem {
  padding-block: var(--space-2xl) var(--space-xl);
}

.problem__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.problem-card {
  position: relative;
  padding: var(--space-md);
  padding-top: calc(var(--space-md) + 8px);
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s, border-color 0.4s;
  overflow: hidden;
}

.problem-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #ff6b3d, #ffa370);
  opacity: 0.9;
}

.problem-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 107, 61, 0.3);
  box-shadow: 0 24px 48px -20px rgba(15, 23, 50, 0.18);
}

.problem-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: linear-gradient(135deg, #fff1ec, #ffe0d3);
  color: #ff6b3d;
  margin-bottom: var(--space-sm);
}

.problem-card__icon .icon {
  width: 28px;
  height: 28px;
}

.problem-card__index {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--color-secondary);
  margin-bottom: 0.6em;
}

.problem-card__title {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-sm);
  color: var(--color-primary);
}

.problem-card__text {
  font-size: 0.9375rem;
  line-height: 1.95;
  color: var(--color-secondary);
}

.problem__keywords {
  padding: var(--space-md);
  background: linear-gradient(135deg, #fff5ef 0%, #ffe8db 100%);
  border-radius: 20px;
  border: 1px solid rgba(255, 107, 61, 0.15);
  text-align: center;
}

.problem__keywords-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: #c14a1f;
  margin-bottom: var(--space-md);
  font-weight: 600;
}

.problem__keywords-label::before {
  content: "";
  width: 6px;
  height: 6px;
  background: #ff6b3d;
  border-radius: 50%;
}

.problem__keywords-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.6em;
}

.problem__keywords-list li {
  font-size: 0.8125rem;
  padding: 0.5em 1.1em;
  background: #fff;
  color: #1a1f2e;
  border: 1px solid rgba(255, 107, 61, 0.2);
  border-radius: 999px;
  font-weight: 500;
}

@media (max-width: 767px) {
  .problem__cards {
    grid-template-columns: 1fr;
  }
}

/* === 既存解の限界 === */
.limits__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.limit-card {
  padding: var(--space-md);
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  transition: transform 0.4s, box-shadow 0.4s, border-color 0.4s;
  position: relative;
  overflow: hidden;
}

.limit-card:hover {
  transform: translateY(-4px);
  border-color: rgba(30, 91, 255, 0.25);
  box-shadow: 0 24px 48px -20px rgba(15, 23, 50, 0.15);
}

.limit-card__head {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.4em 1em;
  background: linear-gradient(135deg, #1e5bff 0%, #4a7fff 100%);
  color: #fff;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
  font-family: 'Inter', sans-serif;
  text-transform: uppercase;
}

.limit-card__title {
  font-size: 1.1875rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.6;
  margin-bottom: var(--space-sm);
}

.limit-card__text {
  font-size: 0.9375rem;
  line-height: 2;
  color: var(--color-secondary);
}

@media (max-width: 767px) {
  .limits__grid {
    grid-template-columns: 1fr;
  }
}

/* === コンセプト === */
.concept {
  position: relative;
  background: linear-gradient(180deg, #fff 0%, #f7f8fc 100%);
  overflow: hidden;
}

.concept::before,
.concept::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  opacity: 0.6;
}

.concept::before {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(30, 91, 255, 0.15), transparent 70%);
  top: -100px;
  left: 10%;
}

.concept::after {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255, 107, 61, 0.1), transparent 70%);
  bottom: -150px;
  right: 5%;
}

.concept__copy {
  position: relative;
  text-align: center;
  font-size: clamp(1.625rem, 4vw, 2.625rem);
  font-weight: 700;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  margin-bottom: var(--space-xl);
  z-index: 1;
}

.concept__copy em {
  font-style: normal;
  position: relative;
  white-space: nowrap;
}

.concept__copy em::before {
  content: "";
  position: absolute;
  left: -0.1em;
  right: -0.1em;
  bottom: 0.05em;
  height: 0.35em;
  background: linear-gradient(90deg, rgba(30, 91, 255, 0.2), rgba(122, 92, 255, 0.25));
  z-index: -1;
  border-radius: 4px;
}

.concept__flow {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: var(--space-md);
  max-width: 980px;
  margin: 0 auto;
  z-index: 1;
}

.concept-col {
  padding: var(--space-md);
  background: #fff;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  box-shadow: 0 30px 60px -30px rgba(15, 23, 50, 0.12);
  display: flex;
  flex-direction: column;
}

.concept-col--from {
  background: linear-gradient(135deg, #fafbff 0%, #f0f3ff 100%);
}

.concept-col--to {
  background: linear-gradient(135deg, #1a1f2e 0%, #0c1330 100%);
  color: #fff;
  border-color: transparent;
  position: relative;
  overflow: hidden;
}

.concept-col--to::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(30, 91, 255, 0.4), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.concept-col__label {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}

.concept-col--to .concept-col__label {
  color: #7fa4ff;
}

.concept-col__heading {
  font-size: 1.1875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-sm);
}

.concept-col__list {
  list-style: none;
  padding: 0;
  margin: 0;
  flex: 1;
}

.concept-col__list li {
  position: relative;
  padding: 0.7em 0 0.7em 1.6em;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9375rem;
  color: var(--color-primary);
}

.concept-col--to .concept-col__list li {
  color: rgba(255, 255, 255, 0.85);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}

.concept-col__list li:last-child {
  border-bottom: none;
}

.concept-col__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.05em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-accent);
  transform: rotate(45deg);
}

.concept-col--to .concept-col__list li::before {
  background: #7fa4ff;
}

.concept__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  position: relative;
}

.concept__arrow svg {
  width: 56px;
  height: 56px;
  color: var(--color-accent);
}

.concept__arrow-line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), rgba(30, 91, 255, 0.2));
  z-index: -1;
}

@media (max-width: 767px) {
  .concept__flow {
    grid-template-columns: 1fr;
  }
  .concept__arrow {
    width: auto;
    padding: var(--space-sm) 0;
  }
  .concept__arrow svg {
    transform: rotate(90deg);
  }
}

/* === サービス紹介（3層構造 / エディトリアル白B2Bスタイル） === */
.architecture {
  background: #fff;
  padding-block: var(--space-2xl) var(--space-xl);
  position: relative;
}

.architecture > .container {
  position: relative;
  z-index: 1;
  max-width: 1080px;
}

.arch-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-border);
}

.arch-item {
  display: grid;
  grid-template-columns: 180px 1fr 88px;
  gap: var(--space-lg);
  align-items: start;
  padding-block: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  transition: background 0.4s ease;
}

.arch-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.arch-item:hover {
  background: linear-gradient(90deg, rgba(30, 91, 255, 0.025) 0%, transparent 60%);
}

.arch-item:hover::before {
  transform: scaleY(1);
}

/* 番号カラム */
.arch-item__col-no {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.6em;
  position: sticky;
  top: var(--space-md);
}

.arch-item__no {
  font-family: 'Inter', sans-serif;
  font-size: clamp(3.5rem, 6.5vw, 5.5rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--color-primary);
  position: relative;
  display: inline-block;
}

.arch-item__no::after {
  content: "";
  display: block;
  width: 40px;
  height: 2px;
  background: var(--color-accent);
  margin-top: 0.5em;
}

.arch-item__label {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  color: var(--color-accent);
  text-transform: uppercase;
}

/* 本文カラム */
.arch-item__col-body {
  max-width: 640px;
}

.arch-item__title {
  font-size: clamp(1.375rem, 2.4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.5;
  color: var(--color-primary);
  margin-bottom: 0.5em;
}

.arch-item__sub {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--color-secondary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.arch-item__text {
  font-size: 0.9375rem;
  line-height: 2;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.arch-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  list-style: none;
  padding: 0;
}

.arch-item__tags li {
  position: relative;
  padding: 0.5em 1em 0.5em 1.8em;
  font-size: 0.8125rem;
  background: #f5f7fb;
  color: var(--color-primary);
  border-radius: 6px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.arch-item__tags li::before {
  content: "";
  position: absolute;
  left: 0.7em;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-top: 1.5px solid var(--color-accent);
  border-right: 1.5px solid var(--color-accent);
  transform: translateY(-50%) rotate(45deg);
}

/* アイコンカラム */
.arch-item__col-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-accent);
  position: sticky;
  top: var(--space-md);
  transition: border-color 0.4s, box-shadow 0.4s;
}

.arch-item:hover .arch-item__col-icon {
  border-color: rgba(30, 91, 255, 0.4);
  box-shadow: 0 12px 28px -14px rgba(30, 91, 255, 0.35);
}

.arch-item__col-icon .icon {
  width: 36px;
  height: 36px;
  stroke-width: 1.4;
}

/* レスポンシブ */
@media (max-width: 900px) {
  .arch-item {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    padding-block: var(--space-md);
  }
  .arch-item__col-no {
    flex-direction: row;
    align-items: baseline;
    gap: var(--space-sm);
    position: static;
  }
  .arch-item__no {
    font-size: 3rem;
  }
  .arch-item__no::after {
    display: none;
  }
  .arch-item__col-icon {
    order: -1;
    width: 56px;
    height: 56px;
    position: static;
  }
  .arch-item__col-icon .icon {
    width: 24px;
    height: 24px;
  }
}

/* === 3つの特徴 === */
.features {
  background: linear-gradient(180deg, #fff 0%, #f7f8fc 100%);
}

.feature {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-xl);
  align-items: center;
  padding-block: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.feature:last-child {
  border-bottom: none;
}

.feature--reverse .feature__body {
  order: 2;
}

.feature--reverse .feature__visual {
  order: 1;
}

.feature__body {
  max-width: 540px;
}

.feature__index {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}

.feature__index::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--color-accent);
}

.feature__title {
  font-size: clamp(1.5rem, 2.8vw, 2rem);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.feature__text {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-secondary);
  margin-bottom: var(--space-md);
}

.feature__list {
  list-style: none;
  padding: 0;
}

.feature__list li {
  position: relative;
  padding: 0.6em 0 0.6em 2em;
  font-size: 0.95rem;
  color: var(--color-primary);
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
}

.feature__list li:last-child {
  border-bottom: none;
}

.feature__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 20px;
  height: 20px;
  background:
    linear-gradient(135deg, var(--color-accent), #7a5cff);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature__list li::after {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
}

.feature__visual {
  position: relative;
}

.feature__visual--image {
  background: none;
  border: none;
  box-shadow: none;
  padding: 0;
}

.feature__image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
}

@media (max-width: 767px) {
  .feature {
    grid-template-columns: 1fr;
    gap: var(--space-md);
    padding-block: var(--space-md);
  }
  .feature--reverse .feature__body {
    order: 1;
  }
  .feature--reverse .feature__visual {
    order: 2;
  }
}

/* Feature 1: Entities Hub */
.entities-hub {
  position: relative;
  aspect-ratio: 1;
  max-width: 460px;
  margin: 0 auto;
}

.entities-hub__center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 130px;
  height: 130px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e5bff 0%, #7a5cff 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  line-height: 1.5;
  box-shadow:
    0 0 0 12px rgba(30, 91, 255, 0.08),
    0 0 0 24px rgba(30, 91, 255, 0.04),
    0 30px 60px -20px rgba(30, 91, 255, 0.5);
}

.entities-hub__center-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  opacity: 0.8;
  margin-bottom: 0.2em;
}

.entity {
  position: absolute;
  width: 130px;
  text-align: center;
  padding: var(--space-sm);
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  box-shadow: 0 14px 32px -14px rgba(15, 23, 50, 0.18);
}

.entity--p {
  top: 0;
  left: 0;
}

.entity--m {
  top: 0;
  right: 0;
}

.entity--t {
  bottom: 0;
  left: 0;
}

.entity--j {
  bottom: 0;
  right: 0;
}

.entity__icon {
  width: 36px;
  height: 36px;
  margin: 0 auto 0.5em;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-accent-soft), #d6e4ff);
  color: var(--color-accent);
}

.entity__icon .icon {
  width: 20px;
  height: 20px;
}

.entity__label {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 0.2em;
}

.entity__caption {
  font-size: 0.7rem;
  color: var(--color-secondary);
  line-height: 1.5;
}

/* Connector lines from center to entities */
.entities-hub__lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* Feature 2: Evolution loop */
.evolve {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  position: relative;
}

.evolve::before {
  content: "";
  position: absolute;
  left: 28px;
  top: 50px;
  bottom: 50px;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--color-accent), transparent);
  opacity: 0.3;
}

.evolve__row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md) var(--space-sm) var(--space-sm);
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  box-shadow: 0 10px 30px -15px rgba(15, 23, 50, 0.12);
  position: relative;
  transition: transform 0.3s;
}

.evolve__row:hover {
  transform: translateX(6px);
}

.evolve__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-accent), #7a5cff);
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 8px 20px -8px rgba(30, 91, 255, 0.5);
}

.evolve__icon .icon {
  width: 24px;
  height: 24px;
}

.evolve__title {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 0.2em;
}

.evolve__text {
  font-size: 0.85rem;
  color: var(--color-secondary);
  line-height: 1.7;
}

/* Feature 3: 4 walls */
.walls {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.wall {
  padding: var(--space-sm) var(--space-md);
  background: #fff;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, border-color 0.3s;
}

.wall::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, #ff6b3d, #ff8e6f);
}

.wall:hover {
  transform: translateY(-3px);
  border-color: rgba(255, 107, 61, 0.3);
}

.wall__no {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  color: #ff6b3d;
  margin-bottom: 0.4em;
  letter-spacing: 0.2em;
}

.wall__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.3em;
  letter-spacing: 0.04em;
}

.wall__text {
  font-size: 0.8125rem;
  color: var(--color-secondary);
  line-height: 1.7;
}

@media (max-width: 480px) {
  .walls {
    grid-template-columns: 1fr;
  }
}

/* === ユースケース === */
.usecases {
  background: linear-gradient(180deg, #f7f8fc 0%, #fff 100%);
}

.usecases__tabs {
  display: inline-flex;
  justify-content: center;
  gap: 4px;
  padding: 4px;
  margin: 0 auto var(--space-lg);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  box-shadow: 0 10px 30px -15px rgba(15, 23, 50, 0.1);
  flex-wrap: wrap;
}

.usecases__tabs-wrap {
  text-align: center;
}

.usecase-tab {
  padding: 0.7em 1.6em;
  background: transparent;
  color: var(--color-secondary);
  border: none;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all 0.3s;
  font-family: inherit;
}

.usecase-tab.is-active {
  background: linear-gradient(135deg, var(--color-accent), #4a7fff);
  color: #fff;
  box-shadow: 0 8px 20px -8px rgba(30, 91, 255, 0.6);
}

.usecase-tab:hover:not(.is-active) {
  color: var(--color-accent);
}

.usecase-panel {
  display: none;
  animation: fadeUp 0.4s ease;
}

.usecase-panel.is-active {
  display: block;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.usecase-roles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.usecase-roles--2col {
  grid-template-columns: repeat(2, 1fr);
  max-width: 840px;
  margin: 0 auto;
}

.role-card {
  position: relative;
  padding: var(--space-md);
  background: #fff;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  transition: transform 0.4s, box-shadow 0.4s, border-color 0.4s;
  overflow: hidden;
}

.role-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), #7a5cff);
}

.role-card:hover {
  transform: translateY(-6px);
  border-color: rgba(30, 91, 255, 0.25);
  box-shadow: 0 24px 60px -20px rgba(15, 23, 50, 0.2);
}

.role-card__role {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 0.4em;
  text-transform: uppercase;
  margin-top: 0.4em;
}

.role-card__title {
  font-size: 1.1875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 0.4em;
}

.role-card__exp {
  font-size: 0.8125rem;
  color: var(--color-secondary);
  margin-bottom: var(--space-md);
  letter-spacing: 0.04em;
}

.role-card__quote {
  position: relative;
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  padding: var(--space-sm) var(--space-sm) var(--space-sm) calc(var(--space-sm) + 6px);
  background: linear-gradient(135deg, #fff5ef 0%, #ffe8db 100%);
  border-radius: 12px;
  margin-bottom: var(--space-md);
  letter-spacing: 0.05em;
}

.role-card__quote::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  background: linear-gradient(180deg, #ff6b3d, #ff8e6f);
  border-radius: 2px;
}

.role-card__arrow {
  display: flex;
  align-items: center;
  gap: 0.5em;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-secondary);
  margin-bottom: 0.6em;
}

.role-card__arrow-line {
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.role-card__ai {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.04em;
}

.role-card__features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4em;
}

.role-card__features li {
  font-size: 0.75rem;
  padding: 0.4em 0.9em;
  background: var(--color-accent-soft);
  border-radius: 999px;
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.03em;
}

@media (max-width: 767px) {
  .usecase-roles,
  .usecase-roles--2col {
    grid-template-columns: 1fr;
  }
}

/* === 導入ステップ === */
.steps {
  background: linear-gradient(180deg, #fff 0%, #f7f8fc 100%);
}

.steps__list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  position: relative;
  counter-reset: step;
}

.steps__list::before {
  content: "";
  position: absolute;
  top: 50px;
  left: 6%;
  right: 6%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), rgba(30, 91, 255, 0.2));
  z-index: 0;
}

.step {
  position: relative;
  padding: var(--space-md) var(--space-sm);
  background: #fff;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  text-align: center;
  z-index: 1;
  transition: transform 0.4s, box-shadow 0.4s;
}

.step:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px -20px rgba(15, 23, 50, 0.15);
}

.step__node {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), #7a5cff);
  color: #fff;
  font-family: 'Inter', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow:
    0 0 0 6px rgba(30, 91, 255, 0.08),
    0 14px 32px -10px rgba(30, 91, 255, 0.5);
  position: relative;
}

.step__duration {
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: 0.4em;
  text-transform: uppercase;
}

.step__title {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-sm);
}

.step__text {
  font-size: 0.8125rem;
  line-height: 1.85;
  color: var(--color-secondary);
}

@media (max-width: 1023px) {
  .steps__list {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps__list::before {
    display: none;
  }
}

@media (max-width: 480px) {
  .steps__list {
    grid-template-columns: 1fr;
  }
}

/* === 料金 === */
.pricing {
  background: linear-gradient(180deg, #f7f8fc 0%, #fff 100%);
}

.pricing__card {
  position: relative;
  max-width: 920px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
  background: linear-gradient(135deg, #0a1024 0%, #131e4a 60%, #1a2a5e 100%);
  color: #fff;
  border-radius: 28px;
  overflow: hidden;
  box-shadow:
    0 40px 80px -30px rgba(15, 23, 50, 0.4),
    0 0 0 1px rgba(127, 164, 255, 0.1);
}

.pricing__card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 100% 0%, rgba(30, 91, 255, 0.4), transparent 60%),
    radial-gradient(ellipse 60% 50% at 0% 100%, rgba(255, 107, 61, 0.2), transparent 60%);
  pointer-events: none;
}

.pricing__card::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.6) 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.6) 30%, transparent 80%);
}

.pricing__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-md);
  align-items: center;
}

.pricing-block {
  text-align: center;
}

.pricing-block__label {
  display: inline-block;
  padding: 0.4em 1em;
  margin-bottom: var(--space-sm);
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-transform: uppercase;
  font-family: 'Inter', sans-serif;
}

.pricing-block__value {
  font-family: 'Inter', sans-serif;
  font-size: clamp(2.25rem, 5.5vw, 3.75rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1;
  background: linear-gradient(135deg, #fff 0%, #c4d4ff 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.pricing-block__unit {
  font-size: 1rem;
  font-weight: 500;
  margin-left: 0.2em;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.7);
  -webkit-text-fill-color: rgba(255, 255, 255, 0.7);
}

.pricing-block__custom {
  font-size: clamp(1.625rem, 4vw, 2.5rem);
  font-weight: 700;
  background: linear-gradient(135deg, #fff 0%, #ffd4b8 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.pricing-block__caption {
  display: block;
  margin-top: var(--space-sm);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.04em;
}

.pricing__plus {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: #7fa4ff;
  font-size: 1.25rem;
  font-weight: 700;
  border: 1px solid rgba(127, 164, 255, 0.3);
}

.pricing__note {
  margin-top: var(--space-lg);
  text-align: center;
  color: var(--color-secondary);
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
}

@media (max-width: 767px) {
  .pricing__inner {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .pricing__card {
    padding: var(--space-lg) var(--space-md);
  }
}

/* === 会社概要 === */
.company {
  background: linear-gradient(180deg, #fff 0%, #f7f8fc 100%);
}

.company-table {
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  padding: var(--space-md);
  box-shadow: 0 20px 40px -25px rgba(15, 23, 50, 0.1);
}

.company-table__row {
  padding: var(--space-sm) 0;
}

.company-table__row dt {
  width: 140px;
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-secondary);
  font-weight: 600;
  text-transform: uppercase;
}

.company-table__row dd {
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* === CTA === */
.cta {
  background:
    radial-gradient(ellipse 80% 60% at 70% 30%, rgba(72, 130, 255, 0.5) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 20% 80%, rgba(122, 92, 255, 0.4) 0%, transparent 55%),
    radial-gradient(ellipse 100% 50% at 50% 100%, rgba(255, 130, 90, 0.25) 0%, transparent 60%),
    linear-gradient(180deg, #06091a 0%, #0c1330 40%, #131e4a 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.9) 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.9) 20%, transparent 70%);
}

.cta__inner {
  position: relative;
  z-index: 1;
  text-align: center;
  padding-block: var(--space-md);
}

.cta__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.5em 1.1em;
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(10px);
}

.cta__title {
  font-size: clamp(1.875rem, 4.4vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-md);
  line-height: 1.5;
}

.cta__title-accent {
  background: linear-gradient(95deg, #7fa4ff 0%, #c4d4ff 50%, #ffd4b8 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cta__text {
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-lg);
  font-size: 1rem;
  line-height: 2;
  opacity: 0.85;
}

.cta__btns {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

/* === フッター === */
.footer {
  background: #06091a;
  padding-block: var(--space-xl) var(--space-md);
}

.footer__brand {
  max-width: 280px;
}

.footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: 'Inter', sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.footer__logo svg {
  width: 28px;
  height: 28px;
}