.tbs-lp {
  --tbs-navy: #06213d;
  --tbs-navy2: #0b3158;
  --tbs-blue: #005bac;
  --tbs-text: #1f2937;
  --tbs-muted: #586678;
  --tbs-line: #d9e1ea;
  --tbs-pale: #f6f8fb;

  color: var(--tbs-text);
  background: #fff;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", YuGothic, Meiryo, sans-serif;
  font-size: 15px;
  line-height: 1.75;
  overflow-x: hidden;

  padding-top: 72px; /* 追加：固定ヘッダー分 */
}

.tbs-lp *,
.tbs-lp *::before,
.tbs-lp *::after {
  box-sizing: border-box;
  border-radius: 0 !important;
}

.tbs-lp :where(h1,h2,h3,p,ul,li,div,section,nav,span,a) {
  margin: 0;
  padding: 0;
}

.tbs-lp img {
  max-width: 100%;
  height: auto;
  display: block;
  vertical-align: middle;
}

.tbs-lp a {
  color: inherit;
  text-decoration: none;
}

.tbs-lp ul {
  list-style: none;
}

.tbs-lp .tbs-wrap {
  width: calc(100% - 40px);
  max-width: 1104px;
  margin: 0 auto;
}

.tbs-lp .tbs-breadcrumb {
  background: #fff;
  border-bottom: 1px solid var(--tbs-line);
  color: #6f7a87;
  font-size: 12px;
  line-height: 1.45;
}

.tbs-lp .tbs-breadcrumb .tbs-wrap {
  padding: 10px 0;
}

.tbs-lp .tbs-breadcrumb a {
  color: #6f7a87;
}

.tbs-lp .tbs-breadcrumb span {
  padding: 0 8px;
  color: #aab4c0;
}

.tbs-lp .tbs-hero {
  position: relative;
  min-height: 500px;
  background: #06213d;
  color: #fff;
  overflow: hidden;
}

.tbs-lp .tbs-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(4,24,44,.96) 0%, rgba(4,24,44,.86) 33%, rgba(4,24,44,.43) 58%, rgba(4,24,44,.05) 100%),     url("https://www.kk-step.jp/img/tokyo_big_sight_main.jpg");
  background-position: center 42%;
  background-size: 112% auto;
  background-repeat: no-repeat;
}

.tbs-lp .tbs-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: .45;
  pointer-events: none;
}

.tbs-lp .tbs-hero__inner {
  position: relative;
  z-index: 1;
  min-height: 500px;
  display: flex;
  align-items: center;
  padding: 38px 0;
}

.tbs-lp .tbs-hero__copy {
  width: 100%;
  max-width: 590px;
  color: #fff;
}

.tbs-lp .tbs-hero h1 {
  margin: 26px 0 0 !important;
  color: #fff !important;
  font-size: clamp(32px, 3.7vw, 46px) !important;
  line-height: 1.24 !important;
  letter-spacing: .03em;
  font-weight: 900 !important;
}

.tbs-lp .tbs-eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 15px;
  border-left: 4px solid #fff;
  background: rgba(255,255,255,.13);
  color: #fff;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .15em;
}

.tbs-lp .tbs-title-line {
  display: block;
  width: 48px;
  height: 2px;
  margin: 22px 0 18px;
  background: rgba(255,255,255,.94);
}

.tbs-lp .tbs-hero__lead {
  max-width: 530px;
  color: rgba(255,255,255,.94);
  font-size: 14px;
  line-height: 1.9;
  font-weight: 600;
}

.tbs-lp .tbs-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 25px;
}

.tbs-lp .tbs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 208px;
  min-height: 46px;
  padding: 11px 22px;
  border: 1px solid transparent;
  font-size: 14px;
  line-height: 1.35;
  font-weight: 900;
  letter-spacing: .04em;
  transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}

.tbs-lp .tbs-btn::after {
  content: "＞";
  margin-left: 14px;
  font-size: .9em;
}

.tbs-lp .tbs-btn:hover {
  transform: translateY(-2px);
}

.tbs-lp .tbs-btn--white {
  background: #fff;
  color: var(--tbs-navy);
  border-color: #fff;
}

.tbs-lp .tbs-btn--white:hover {
  background: #f1f5f9;
}

.tbs-lp .tbs-btn--line {
  background: rgba(255,255,255,.03);
  color: #fff;
  border-color: rgba(255,255,255,.72);
}

.tbs-lp .tbs-btn--line:hover {
  background: rgba(255,255,255,.12);
}

.tbs-lp .tbs-btn--blue {
  background: var(--tbs-blue);
  color: #fff;
  border-color: var(--tbs-blue);
}

.tbs-lp .tbs-btn--blue:hover {
  background: #004b90;
  border-color: #004b90;
}

.tbs-lp .tbs-btn--outline {
  background: #fff;
  color: var(--tbs-navy);
  border-color: #aeb9c6;
}

.tbs-lp .tbs-btn--outline:hover {
  color: var(--tbs-blue);
  border-color: var(--tbs-blue);
}

.tbs-lp .tbs-summary {
  background: #fff;
  border-bottom: 1px solid var(--tbs-line);
}

.tbs-lp .tbs-summary__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-left: 1px solid var(--tbs-line);
  background: #fff;
}

.tbs-lp .tbs-summary__item {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 17px;
  align-items: center;
  min-height: 108px;
  padding: 18px 24px;
  border-right: 1px solid var(--tbs-line);
  background: #fff;
}

.tbs-lp .tbs-icon {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  color: #65758a;
}

.tbs-lp .tbs-icon svg {
  width: 46px;
  height: 46px;
  stroke: currentColor;
  stroke-width: 1.7;
  fill: none;
}

.tbs-lp .tbs-summary strong {
  display: block;
  color: var(--tbs-blue);
  font-size: clamp(24px,2.4vw,32px);
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: .05em;
}

.tbs-lp .tbs-summary span {
  display: block;
  margin-top: 5px;
  color: #5e6b7c;
  font-size: 14px;
  line-height: 1.6;
  font-weight: 800;
}

.tbs-lp .tbs-section {
  padding: 38px 0 0;
  background: #fff;
}

.tbs-lp .tbs-about__row {
  display: grid;
  grid-template-columns: 240px minmax(0,1fr);
  gap: 34px;
  align-items: start;
}

.tbs-lp .tbs-about__title {
  color: var(--tbs-navy);
  font-size: 21px;
  line-height: 1.5;
  font-weight: 900;
  letter-spacing: .04em;
}

.tbs-lp .tbs-about__text {
  color: #4c596b;
  font-size: 14px;
  line-height: 1.9;
  font-weight: 600;
}

.tbs-lp .tbs-rule {
  margin-top: 32px;
  border-top: 1px solid var(--tbs-line);
}

.tbs-lp .tbs-section__title {
  margin: 0 0 20px !important;
  color: var(--tbs-navy) !important;
  font-size: 24px !important;
  line-height: 1.5 !important;
  font-weight: 900 !important;
  letter-spacing: .05em;
}

.tbs-lp .tbs-service__head {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 34px;
  align-items: start;
  margin-bottom: 20px;
}

.tbs-lp .tbs-service__head .tbs-section__title {
  margin: 0 !important;
}

.tbs-lp .tbs-service__lead {
  color: #4c596b;
  font-size: 14px;
  line-height: 1.9;
  font-weight: 600;
}

.tbs-lp .tbs-service__grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 12px;
}

.tbs-lp .tbs-service__item {
  min-height: 140px;
  padding: 18px 16px 16px;
  border: 1px solid var(--tbs-line);
  background: #fff;
}

.tbs-lp .tbs-service__item .tbs-icon {
  width: 48px;
  height: 40px;
  place-items: start;
  margin-bottom: 8px;
  color: var(--tbs-blue);
}

.tbs-lp .tbs-service__item .tbs-icon svg {
  width: 40px;
  height: 40px;
}

.tbs-lp .tbs-service__item strong {
  display: block;
  margin-bottom: 8px;
  color: var(--tbs-navy);
  font-size: 15px;
  line-height: 1.45;
  font-weight: 900;
}

.tbs-lp .tbs-service__item span {
  display: block;
  color: #5d6a7a;
  font-size: 13px;
  line-height: 1.7;
  font-weight: 700;
}

.tbs-lp .tbs-cases {
  padding-top: 42px;
}

.tbs-lp .tbs-case__grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 18px;
}

.tbs-lp .tbs-case {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--tbs-line);
  background: #fff;
  min-height: 100%;
  transition: .18s ease;
}

.tbs-lp .tbs-case:hover {
  transform: translateY(-2px);
  border-color: #9fb2c7;
  box-shadow: 0 12px 24px rgba(6,28,50,.09);
}

.tbs-lp .tbs-case__image {
  aspect-ratio: 4/3.1;
  overflow: hidden;
  border-bottom: 1px solid var(--tbs-line);
  background: #e8eef5;
}

.tbs-lp .tbs-case__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tbs-lp .tbs-case__body {
  padding: 15px 16px 17px;
}

.tbs-lp .tbs-case h3 {
  margin: 0 0 6px !important;
  color: var(--tbs-blue) !important;
  font-size: 15px !important;
  line-height: 1.55 !important;
  font-weight: 900 !important;
}

.tbs-lp .tbs-case p {
  color: #5c6878;
  font-size: 13px;
  line-height: 1.7;
  font-weight: 700;
}

.tbs-lp .tbs-results {
  margin-top: 32px;
  padding: 18px 0;
  border-top: 1px solid var(--tbs-line);
  border-bottom: 1px solid var(--tbs-line);
  background: #fff;
}

.tbs-lp .tbs-results__row {
  display: grid;
  grid-template-columns: 240px minmax(0,1fr);
  gap: 34px;
  align-items: start;
}

.tbs-lp .tbs-results__title {
  color: var(--tbs-navy);
  font-size: 19px;
  line-height: 1.55;
  font-weight: 900;
  letter-spacing: .04em;
}

.tbs-lp .tbs-results__list {
  color: #3f4b5b;
  font-size: 14px;
  line-height: 1.9;
  font-weight: 700;
}

.tbs-lp .tbs-results__list li {
  display: inline;
}

.tbs-lp .tbs-results__list li:not(:last-child)::after {
  content: "｜";
  padding: 0 10px;
  color: #b8c1cc;
  font-weight: 400;
}

.tbs-lp .tbs-cta {
  padding: 30px 0 62px;
  background: #fff;
}

.tbs-lp .tbs-cta__box {
  max-width: 1104px;
  margin: 0 auto;
  padding: 34px 28px;
  background: linear-gradient(180deg,#f8fafc 0%,#f1f4f8 100%);
  border: 1px solid #e1e7ef;
  text-align: center;
}

.tbs-lp .tbs-cta h2 {
  margin: 0 0 8px !important;
  color: var(--tbs-navy) !important;
  font-size: 26px !important;
  line-height: 1.5 !important;
  font-weight: 900 !important;
  letter-spacing: .05em;
}

.tbs-lp .tbs-cta p {
  color: #647286;
  font-size: 14px;
  line-height: 1.9;
  font-weight: 700;
}

.tbs-lp .tbs-cta .tbs-actions {
  justify-content: center;
  margin-top: 22px;
}

@media (max-width:980px) {
  .tbs-lp .tbs-hero,
  .tbs-lp .tbs-hero__inner {
    min-height: 460px;
  }

  .tbs-lp .tbs-summary__grid {
    grid-template-columns: 1fr;
    border-left: 0;
  }

  .tbs-lp .tbs-summary__item {
    border-right: 0;
    border-bottom: 1px solid var(--tbs-line);
  }

  .tbs-lp .tbs-summary__item:last-child {
    border-bottom: 0;
  }

  .tbs-lp .tbs-about__row,
  .tbs-lp .tbs-results__row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .tbs-lp .tbs-service__grid {
    grid-template-columns: repeat(2,1fr);
  }

  .tbs-lp .tbs-case__grid {
    grid-template-columns: repeat(2,1fr);
    gap: 16px;
  }

  .tbs-lp .tbs-service__head {
    grid-template-columns: 1fr;
    gap: 12px;
  }

}

@media (max-width:640px) {
  .tbs-lp .tbs-wrap {
    width: calc(100% - 24px);
  }

  .tbs-lp .tbs-breadcrumb {
    font-size: 11px;
  }

  .tbs-lp .tbs-hero,
  .tbs-lp .tbs-hero__inner {
    min-height: 520px;
  }

  .tbs-lp .tbs-hero__inner {
    align-items: flex-end;
    padding: 36px 0;
  }

.tbs-lp .tbs-hero::before {
  background-image:
    linear-gradient(180deg, rgba(4,24,44,.28) 0%, rgba(4,24,44,.78) 56%, rgba(4,24,44,.96) 100%),
    url("https://www.kk-step.jp/img/tokyo_big_sight_main.jpg");
  background-position: center top;
  background-size: cover;
  background-repeat: no-repeat;
}

  .tbs-lp .tbs-hero h1 {
    font-size: 32px !important;
  }

  .tbs-lp .tbs-hero__lead {
    font-size: 14px;
    line-height: 1.85;
  }

  .tbs-lp .tbs-actions {
    flex-direction: column;
  }

  .tbs-lp .tbs-btn {
    width: 100%;
    min-width: 0;
  }

  .tbs-lp .tbs-summary__item {
    grid-template-columns: 54px 1fr;
    min-height: 96px;
    padding: 16px 14px;
  }

  .tbs-lp .tbs-service__grid,
  .tbs-lp .tbs-case__grid {
    grid-template-columns: 1fr;
  }

  .tbs-lp .tbs-section {
    padding-top: 36px;
  }

  .tbs-lp .tbs-results__list li {
    display: block;
    padding: 2px 0;
  }

  .tbs-lp .tbs-results__list li:not(:last-child)::after {
    content: "";
    padding: 0;
  }

  .tbs-lp .tbs-cta__box {
    padding: 30px 16px;
  }

  .tbs-lp .tbs-cta h2 {
    font-size: 23px !important;
  }

}

/* =========================================================
   東京ビッグサイトLP 追加アクセント
   既存HTMLは変更せず、bigsight.cssの末尾に追記して使えます
========================================================= */

/* セクション見出しに英字ラベルを追加 */
.tbs-lp .tbs-about__title::before,
.tbs-lp .tbs-services .tbs-section__title::before,
.tbs-lp .tbs-cases .tbs-section__title::before,
.tbs-lp .tbs-results__title::before {
  display: block;
  margin-bottom: 6px;
  color: var(--tbs-blue);
  font-size: 11px;
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: .18em;
}

.tbs-lp .tbs-about__title::before {
  content: "ABOUT";
}

.tbs-lp .tbs-services .tbs-section__title::before {
  content: "SERVICE";
}

.tbs-lp .tbs-cases .tbs-section__title::before {
  content: "CASE STUDY";
}

.tbs-lp .tbs-results__title::before {
  content: "WORKS";
}

/* 3つの強みカードに細い青ラインを追加 */
.tbs-lp .tbs-summary__item {
  position: relative;
  overflow: hidden;
}

.tbs-lp .tbs-summary__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--tbs-blue);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s ease;
}

.tbs-lp .tbs-summary__item:hover::before {
  transform: scaleX(1);
}

/* 対応内容カードに控えめな左ラインとホバー感を追加 */
.tbs-lp .tbs-service__item {
  position: relative;
  overflow: hidden;
  transition:
    border-color .2s ease,
    background .2s ease,
    transform .2s ease,
    box-shadow .2s ease;
}

.tbs-lp .tbs-service__item::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 0;
  width: 3px;
  height: 38px;
  background: var(--tbs-blue);
}

.tbs-lp .tbs-service__item:hover {
  border-color: #9fb2c7;
  background: linear-gradient(180deg, #fff 0%, #f7fafc 100%);
  box-shadow: 0 12px 22px rgba(6, 28, 50, .07);
  transform: translateY(-2px);
}

/* 展示事例の画像に小さなラベルを追加 */
.tbs-lp .tbs-case__image {
  position: relative;
}

.tbs-lp .tbs-case__image::after {
  content: "VIEW CASE";
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 4px 8px;
  background: rgba(6, 33, 61, .88);
  color: #fff;
  font-size: 10px;
  line-height: 1.2;
  font-weight: 900;
  letter-spacing: .12em;
  opacity: .92;
}

.tbs-lp .tbs-case__image img {
  transition: transform .28s ease;
}

.tbs-lp .tbs-case:hover .tbs-case__image img {
  transform: scale(1.045);
}

/* 納品実績を少しだけパネル風に */
.tbs-lp .tbs-results {
  background:
    linear-gradient(90deg, rgba(0, 91, 172, .045), rgba(255, 255, 255, 0) 38%),
    #fff;
}

/* 下部CTAに上ラインを追加して締める */
.tbs-lp .tbs-cta__box {
  position: relative;
  overflow: hidden;
}

.tbs-lp .tbs-cta__box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 120px;
  height: 3px;
  background: var(--tbs-blue);
  transform: translateX(-50%);
}

/* スマホでは装飾を少し控えめに */
@media (max-width: 640px) {
  .tbs-lp .tbs-case__image::after {
    right: 8px;
    bottom: 8px;
    font-size: 9px;
  }

  .tbs-lp .tbs-service__item:hover,
  .tbs-lp .tbs-case:hover {
    transform: none;
  }
}