/* =========================================================
   CUSTOM THEME RESEARCH
   個別テーマ型リサーチ
========================================================= */


/* =========================================================
   COMMON
========================================================= */

.ct-intro,
.ct-about,
.ct-questions,
.ct-design,
.ct-cases,
.ct-methods,
.ct-focus,
.ct-layers,
.ct-output,
.ct-process,
.ct-scale,
.ct-boundary,
.ct-difference,
.ct-proof,
.ct-faq,
.ct-related,
.ct-final {
  padding: 90px 0;
}

.ct-about,
.ct-design,
.ct-methods,
.ct-layers,
.ct-process,
.ct-boundary,
.ct-proof,
.ct-related {
  background: #f6f8fa;
}

.ct-section-lead {
  max-width: 820px;
  margin: 0 auto 48px;
  text-align: center;
  font-size: 16px;
  line-height: 2;
  color: #444;
}

.ct-intro *,
.ct-about *,
.ct-questions *,
.ct-design *,
.ct-cases *,
.ct-methods *,
.ct-focus *,
.ct-layers *,
.ct-output *,
.ct-process *,
.ct-scale *,
.ct-boundary *,
.ct-difference *,
.ct-proof *,
.ct-faq *,
.ct-related *,
.ct-final * {
  box-sizing: border-box;
}


/* =========================================================
   INTRODUCTION
========================================================= */

.ct-intro {
  background: #fff;
}

.ct-intro .parts-title {
  margin-bottom: 32px;
}

.ct-intro__lead {
  margin: 0 auto 38px;
  text-align: center;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.9;
  color: #17345d;
}

.ct-intro__body {
  max-width: 850px;
  margin: 0 auto;
}

.ct-intro__body p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 2;
  color: #444;
}

.ct-intro__body p:last-child {
  margin-bottom: 0;
}

.ct-intro__buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  margin-top: 46px;
}


/* =========================================================
   WHAT IS
========================================================= */

.ct-about__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.7fr);
  gap: 48px;
  align-items: stretch;
  max-width: 1060px;
  margin: 50px auto 0;
}

.ct-about__text {
  padding: 42px 46px;
  background: #fff;
  border: 1px solid #e2e7ec;
}

.ct-about__text p {
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 2;
  color: #444;
}

.ct-about__text p:last-child {
  margin-bottom: 0;
}

.ct-about__message {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 42px 38px;
  background: #17345d;
  color: #fff;
}

.ct-about__message span {
  display: block;
  margin-bottom: 18px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  opacity: 0.72;
}

.ct-about__message strong {
  display: block;
  font-size: 22px;
  line-height: 1.8;
  font-weight: 600;
}


/* =========================================================
   STARTING QUESTIONS
========================================================= */

.ct-questions__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1080px;
  margin: 50px auto 0;
}

.ct-question-card {
  position: relative;
  min-height: 180px;
  padding: 34px 30px 30px;
  background: #fff;
  border: 1px solid #dfe5eb;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.ct-question-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 26px rgba(18, 45, 78, 0.08);
}

.ct-question-card span {
  display: block;
  margin-bottom: 18px;
  color: #315f8d;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.ct-question-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: #333;
}

.ct-questions__note {
  max-width: 860px;
  margin: 40px auto 0;
  padding: 24px 30px;
  background: #eef3f7;
  border-left: 4px solid #315f8d;
  font-size: 15px;
  line-height: 1.9;
  color: #394653;
}


/* =========================================================
   RESEARCH DESIGN
========================================================= */

.ct-design__flow {
  display: grid;
  grid-template-columns:
    minmax(0, 1fr) 24px
    minmax(0, 1fr) 24px
    minmax(0, 1fr) 24px
    minmax(0, 1fr) 24px
    minmax(0, 1fr) 24px
    minmax(0, 1fr);
  align-items: center;
  max-width: 1160px;
  margin: 0 auto;
}

.ct-design__item {
  min-height: 210px;
  padding: 30px 18px 26px;
  background: #fff;
  border-top: 4px solid #17345d;
  border-right: 1px solid #e0e6eb;
  border-bottom: 1px solid #e0e6eb;
  border-left: 1px solid #e0e6eb;
  text-align: center;
}

.ct-design__number {
  display: block;
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #6b8299;
}

.ct-design__item h3 {
  margin: 0 0 14px;
  font-size: 21px;
  font-weight: 600;
  color: #17345d;
}

.ct-design__item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: #555;
}

.ct-design__arrow {
  text-align: center;
  font-size: 20px;
  color: #8ca0b3;
}

.ct-design__point {
  max-width: 900px;
  margin: 42px auto 0;
  padding: 26px 34px;
  background: #17345d;
  text-align: center;
}

.ct-design__point p {
  margin: 0;
  color: #fff;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.9;
}


/* =========================================================
   USE CASES
========================================================= */

.ct-cases__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 1080px;
  margin: 50px auto 0;
}

.ct-case-card {
  padding: 34px 30px 32px;
  background: #fff;
  border: 1px solid #e0e5e9;
}

.ct-case-card__label {
  display: block;
  margin-bottom: 15px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #66829d;
}

.ct-case-card h3 {
  margin: 0 0 16px;
  font-size: 18px;
  line-height: 1.55;
  color: #17345d;
}

.ct-case-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: #555;
}


/* =========================================================
   OBSERVATION METHODS
========================================================= */

.ct-methods__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
}

.ct-method-card {
  min-height: 150px;
  padding: 28px 24px;
  background: #fff;
  border: 1px solid #dde4ea;
}

.ct-method-card h3 {
  position: relative;
  margin: 0 0 16px;
  padding-bottom: 13px;
  font-size: 16px;
  line-height: 1.5;
  color: #17345d;
}

.ct-method-card h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background: #315f8d;
}

.ct-method-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: #555;
}


/* =========================================================
   KEEP THE FOCUS
========================================================= */

.ct-focus {
  background: #fff;
}

.ct-focus__flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  max-width: 1080px;
  margin: 50px auto 0;
  border: 1px solid #dfe5ea;
}

.ct-focus__item {
  position: relative;
  min-height: 225px;
  padding: 34px 28px 30px;
  border-right: 1px solid #dfe5ea;
}

.ct-focus__item:last-child {
  border-right: 0;
}

.ct-focus__item span {
  display: inline-block;
  margin-bottom: 20px;
  font-size: 12px;
  font-weight: 700;
  color: #6f879d;
}

.ct-focus__item h3 {
  margin: 0 0 15px;
  font-size: 20px;
  color: #17345d;
}

.ct-focus__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: #555;
}


/* =========================================================
   FOUR LAYERS
========================================================= */

.ct-layers__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
}

.ct-layer-card {
  position: relative;
  min-height: 230px;
  padding: 35px 28px 30px;
  background: #fff;
  border: 1px solid #dfe5ea;
}

.ct-layer-card__number {
  display: block;
  margin-bottom: 24px;
  font-size: 28px;
  font-weight: 300;
  line-height: 1;
  color: #c2ced9;
}

.ct-layer-card h3 {
  margin: 0 0 15px;
  font-size: 19px;
  color: #17345d;
}

.ct-layer-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: #555;
}

.ct-layer-card:nth-child(3) {
  background: #eef3f7;
}


/* =========================================================
   OUTPUT
========================================================= */

.ct-output {
  background: #fff;
}

.ct-output__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 24px;
  max-width: 1000px;
  margin: 50px auto 0;
}

.ct-output__item {
  display: flex;
  gap: 22px;
  padding: 26px 28px;
  border: 1px solid #e0e5ea;
  background: #fff;
}

.ct-output__item > span {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 700;
  color: #7890a5;
}

.ct-output__item h3 {
  margin: 0 0 9px;
  font-size: 17px;
  color: #17345d;
}

.ct-output__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #555;
}

.ct-output__note {
  max-width: 900px;
  margin: 38px auto 0;
  padding: 24px 30px;
  background: #f2f5f7;
  text-align: center;
  font-size: 14px;
  line-height: 1.9;
  color: #555;
}


/* =========================================================
   PROCESS
========================================================= */

.ct-process__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  max-width: 1100px;
  margin: 50px auto 0;
}

.ct-process__item {
  min-height: 205px;
  padding: 30px 26px 26px;
  background: #fff;
  border: 1px solid #dfe5ea;
}

.ct-process__item span {
  display: block;
  margin-bottom: 16px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #71899f;
}

.ct-process__item h3 {
  margin: 0 0 14px;
  font-size: 18px;
  color: #17345d;
}

.ct-process__item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.85;
  color: #555;
}

.ct-process__item:last-child {
  background: #17345d;
}

.ct-process__item:last-child span,
.ct-process__item:last-child h3,
.ct-process__item:last-child p {
  color: #fff;
}

.ct-process__item:last-child span {
  opacity: 0.72;
}


/* =========================================================
   SCALE & COST
========================================================= */

.ct-scale {
  background: #fff;
}

.ct-scale__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1040px;
  margin: 0 auto;
}

.ct-scale__item {
  padding: 30px 28px;
  background: #f6f8fa;
  border-top: 3px solid #315f8d;
}

.ct-scale__item h3 {
  margin: 0 0 13px;
  font-size: 17px;
  color: #17345d;
}

.ct-scale__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: #555;
}

.ct-scale__note {
  max-width: 900px;
  margin: 38px auto 0;
  padding: 25px 30px;
  border-left: 4px solid #315f8d;
  background: #eef3f7;
  font-size: 15px;
  line-height: 1.9;
  color: #42505d;
}


/* =========================================================
   RESEARCH RULES
========================================================= */

.ct-boundary__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  max-width: 1040px;
  margin: 0 auto;
}

.ct-boundary__box {
  padding: 36px 34px;
  background: #fff;
  border: 1px solid #dfe5ea;
}

.ct-boundary__box h3 {
  margin: 0 0 24px;
  padding-bottom: 15px;
  border-bottom: 1px solid #dde4e9;
  font-size: 19px;
  color: #17345d;
}

.ct-boundary__box ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.ct-boundary__box li {
  position: relative;
  margin: 0 0 15px;
  padding-left: 24px;
  font-size: 14px;
  line-height: 1.8;
  color: #555;
}

.ct-boundary__box li:last-child {
  margin-bottom: 0;
}

.ct-boundary__box--yes li::before {
  content: "○";
  position: absolute;
  top: 0;
  left: 0;
  color: #315f8d;
  font-weight: 700;
}

.ct-boundary__box--no li::before {
  content: "—";
  position: absolute;
  top: 0;
  left: 2px;
  color: #7b8791;
}

.ct-boundary__note {
  max-width: 900px;
  margin: 34px auto 0;
  text-align: center;
  font-size: 14px;
  line-height: 1.9;
  color: #555;
}


/* =========================================================
   DIFFERENCE
========================================================= */

.ct-difference {
  background: #fff;
}

.ct-difference__list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 1080px;
  margin: 50px auto 0;
}

.ct-difference__item {
  min-height: 180px;
  padding: 28px 26px;
  background: #fff;
  border: 1px solid #dfe5ea;
}

.ct-difference__item h3 {
  margin: 0 0 14px;
  font-size: 17px;
  line-height: 1.5;
  color: #17345d;
}

.ct-difference__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: #555;
}

.ct-difference__item--current {
  background: #17345d;
  border-color: #17345d;
}

.ct-difference__item--current h3,
.ct-difference__item--current p {
  color: #fff;
}

.ct-difference__note {
  max-width: 880px;
  margin: 36px auto 0;
  text-align: center;
  font-size: 14px;
  line-height: 1.9;
  color: #555;
}


/* =========================================================
   SEON PROOF CONNECTION
========================================================= */

.ct-proof__box {
  max-width: 1060px;
  margin: 0 auto;
  padding: 58px 56px;
  background: #fff;
  border: 1px solid #dfe5ea;
}

.ct-proof__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 45px;
}

.ct-proof__item {
  padding: 34px 32px;
  background: #f5f7f9;
  border-top: 3px solid #315f8d;
}

.ct-proof__item span {
  display: block;
  margin-bottom: 16px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #758ca1;
}

.ct-proof__item h3 {
  margin: 0 0 14px;
  font-size: 20px;
  color: #17345d;
}

.ct-proof__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: #555;
}

.ct-proof__note {
  max-width: 820px;
  margin: 32px auto 0;
  text-align: center;
  font-size: 14px;
  line-height: 1.9;
  color: #555;
}

.ct-proof__button {
  margin-top: 34px;
  text-align: center;
}


/* =========================================================
   FAQ
========================================================= */

.ct-faq {
  background: #fff;
}

.ct-faq__list {
  max-width: 920px;
  margin: 50px auto 0;
  border-top: 1px solid #dfe4e8;
}

.ct-faq__item {
  border-bottom: 1px solid #dfe4e8;
}

.ct-faq__item summary {
  position: relative;
  padding: 24px 52px 24px 40px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.7;
  color: #17345d;
}

.ct-faq__item summary::-webkit-details-marker {
  display: none;
}

.ct-faq__item summary::before {
  content: "Q";
  position: absolute;
  left: 8px;
  top: 23px;
  color: #315f8d;
  font-size: 17px;
  font-weight: 700;
}

.ct-faq__item summary::after {
  content: "+";
  position: absolute;
  top: 20px;
  right: 15px;
  font-size: 24px;
  line-height: 1;
  font-weight: 300;
  color: #6f8395;
}

.ct-faq__item[open] summary::after {
  content: "−";
}

.ct-faq__answer {
  padding: 0 40px 26px;
}

.ct-faq__answer p {
  position: relative;
  margin: 0;
  padding-left: 30px;
  font-size: 14px;
  line-height: 1.9;
  color: #555;
}

.ct-faq__answer p::before {
  content: "A";
  position: absolute;
  top: 0;
  left: 0;
  color: #7d8c99;
  font-weight: 700;
}


/* =========================================================
   RELATED RESEARCH
========================================================= */

.ct-related__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1080px;
  margin: 50px auto 0;
}

.ct-related__card {
  display: flex;
  flex-direction: column;
  min-height: 235px;
  padding: 30px 28px;
  background: #fff;
  border: 1px solid #dfe5ea;
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.ct-related__card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(15, 45, 78, 0.08);
}

.ct-related__card > span {
  display: block;
  margin-bottom: 18px;
  font-size: 11px;
  font-weight: 700;
  color: #8094a7;
}

.ct-related__card h3 {
  margin: 0 0 13px;
  font-size: 18px;
  color: #17345d;
}

.ct-related__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: #555;
}

.ct-related__link {
  margin-top: auto;
  padding-top: 22px;
  font-size: 14px;
  font-weight: 600;
  color: #315f8d;
}

.ct-related__card--all {
  background: #17345d;
  border-color: #17345d;
}

.ct-related__card--all > span,
.ct-related__card--all h3,
.ct-related__card--all p,
.ct-related__card--all .ct-related__link {
  color: #fff;
}


/* =========================================================
   FINAL CTA
========================================================= */

.ct-final {
  background: #17345d;
}

.ct-final__box {
  max-width: 930px;
  margin: 0 auto;
  text-align: center;
  color: #fff;
}

.ct-final__en {
  display: block;
  margin-bottom: 22px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.17em;
  opacity: 0.66;
}

.ct-final__box h2 {
  margin: 0 0 32px;
  color: #fff;
  font-size: 34px;
  line-height: 1.55;
  font-weight: 600;
}

.ct-final__box p {
  margin: 0 0 20px;
  color: #fff;
  font-size: 15px;
  line-height: 2;
}

.ct-final__buttons {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  margin-top: 40px;
}

.ct-final .parts-button a {
  background: #fff;
  color: #17345d;
}

.ct-final .parts-button a:hover {
  opacity: 0.9;
}


/* =========================================================
   TABLET
========================================================= */

@media screen and (max-width: 1100px) {

  .ct-design__flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    max-width: 900px;
  }

  .ct-design__arrow {
    display: none;
  }

  .ct-design__item {
    min-height: 190px;
  }

  .ct-methods__grid,
  .ct-layers__grid,
  .ct-process__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

}


/* =========================================================
   MOBILE
========================================================= */

@media screen and (max-width: 768px) {

  .ct-intro,
  .ct-about,
  .ct-questions,
  .ct-design,
  .ct-cases,
  .ct-methods,
  .ct-focus,
  .ct-layers,
  .ct-output,
  .ct-process,
  .ct-scale,
  .ct-boundary,
  .ct-difference,
  .ct-proof,
  .ct-faq,
  .ct-related,
  .ct-final {
    padding: 60px 0;
  }

  .ct-section-lead {
    margin-bottom: 34px;
    font-size: 14px;
    line-height: 1.9;
    text-align: left;
    text-wrap: balance;
  }

  .pc-only {
    display: none;
  }


  /* INTRO */

  .ct-intro__lead {
    margin-bottom: 28px;
    font-size: 17px;
    line-height: 1.8;
    text-align: left;
    text-wrap: balance;
  }

  .ct-intro__body p {
    margin-bottom: 16px;
    font-size: 14px;
    line-height: 1.9;
  }

  .ct-intro__buttons,
  .ct-final__buttons {
    flex-direction: column;
    gap: 12px;
    margin-top: 34px;
  }

  .ct-intro__buttons .parts-button,
  .ct-final__buttons .parts-button {
    width: 100%;
  }

  .ct-intro__buttons .parts-button a,
  .ct-final__buttons .parts-button a {
    width: 100%;
  }


  /* ABOUT */

  .ct-about__grid {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 35px;
  }

  .ct-about__text {
    padding: 28px 24px;
  }

  .ct-about__text p {
    font-size: 14px;
    line-height: 1.9;
  }

  .ct-about__message {
    padding: 30px 26px;
  }

  .ct-about__message strong {
    font-size: 18px;
    line-height: 1.75;
    text-wrap: balance;
  }


  /* QUESTIONS */

  .ct-questions__grid {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 35px;
  }

  .ct-question-card {
    min-height: auto;
    padding: 25px 23px;
  }

  .ct-question-card span {
    margin-bottom: 11px;
  }

  .ct-question-card p {
    font-size: 14px;
    line-height: 1.85;
  }

  .ct-questions__note {
    margin-top: 28px;
    padding: 20px 22px;
    font-size: 14px;
    line-height: 1.85;
  }


  /* DESIGN */

  .ct-design__flow {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .ct-design__item {
    min-height: auto;
    padding: 24px 22px;
    text-align: left;
    border-top-width: 3px;
  }

  .ct-design__number {
    margin-bottom: 8px;
  }

  .ct-design__item h3 {
    margin-bottom: 9px;
    font-size: 18px;
  }

  .ct-design__item p {
    font-size: 14px;
    line-height: 1.75;
  }

  .ct-design__item p br {
    display: none;
  }

  .ct-design__point {
    margin-top: 28px;
    padding: 21px 22px;
    text-align: left;
  }

  .ct-design__point p {
    font-size: 14px;
    line-height: 1.8;
  }


  /* CASES */

  .ct-cases__grid {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 35px;
  }

  .ct-case-card {
    padding: 25px 23px;
  }

  .ct-case-card h3 {
    font-size: 17px;
  }

  .ct-case-card p {
    font-size: 14px;
    line-height: 1.85;
  }


  /* METHODS */

  .ct-methods__grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .ct-method-card {
    min-height: auto;
    padding: 23px 22px;
  }

  .ct-method-card h3 {
    margin-bottom: 12px;
    padding-bottom: 11px;
    font-size: 16px;
  }

  .ct-method-card p {
    font-size: 14px;
  }


  /* FOCUS */

  .ct-focus__flow {
    grid-template-columns: 1fr;
    margin-top: 35px;
  }

  .ct-focus__item {
    min-height: auto;
    padding: 25px 23px;
    border-right: 0;
    border-bottom: 1px solid #dfe5ea;
  }

  .ct-focus__item:last-child {
    border-bottom: 0;
  }

  .ct-focus__item span {
    margin-bottom: 10px;
  }

  .ct-focus__item h3 {
    margin-bottom: 10px;
    font-size: 18px;
  }

  .ct-focus__item p {
    font-size: 14px;
    line-height: 1.85;
  }


  /* 4 LAYERS */

  .ct-layers__grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .ct-layer-card {
    min-height: auto;
    padding: 25px 23px;
  }

  .ct-layer-card__number {
    margin-bottom: 12px;
    font-size: 22px;
  }

  .ct-layer-card h3 {
    margin-bottom: 10px;
    font-size: 18px;
  }

  .ct-layer-card p {
    font-size: 14px;
    line-height: 1.85;
  }


  /* OUTPUT */

  .ct-output__grid {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 35px;
  }

  .ct-output__item {
    gap: 15px;
    padding: 22px 20px;
  }

  .ct-output__item h3 {
    font-size: 16px;
  }

  .ct-output__item p {
    font-size: 13px;
  }

  .ct-output__note {
    margin-top: 28px;
    padding: 20px 22px;
    text-align: left;
    font-size: 13px;
  }


  /* PROCESS */

  .ct-process__grid {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 35px;
  }

  .ct-process__item {
    min-height: auto;
    padding: 24px 22px;
  }

  .ct-process__item span {
    margin-bottom: 9px;
  }

  .ct-process__item h3 {
    margin-bottom: 9px;
    font-size: 17px;
  }

  .ct-process__item p {
    font-size: 13px;
  }


  /* SCALE */

  .ct-scale__grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .ct-scale__item {
    padding: 24px 22px;
  }

  .ct-scale__item h3 {
    font-size: 16px;
  }

  .ct-scale__item p {
    font-size: 13px;
  }

  .ct-scale__note {
    margin-top: 28px;
    padding: 20px 22px;
    font-size: 13px;
  }


  /* BOUNDARY */

  .ct-boundary__grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .ct-boundary__box {
    padding: 27px 23px;
  }

  .ct-boundary__box h3 {
    margin-bottom: 18px;
    font-size: 17px;
  }

  .ct-boundary__box li {
    margin-bottom: 12px;
    font-size: 13px;
    line-height: 1.8;
  }

  .ct-boundary__note {
    margin-top: 25px;
    text-align: left;
    font-size: 13px;
  }


  /* DIFFERENCE */

  .ct-difference__list {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 35px;
  }

  .ct-difference__item {
    min-height: auto;
    padding: 23px 22px;
  }

  .ct-difference__item h3 {
    margin-bottom: 9px;
    font-size: 16px;
  }

  .ct-difference__item p {
    font-size: 13px;
  }

  .ct-difference__note {
    margin-top: 26px;
    text-align: left;
    font-size: 13px;
  }


  /* PROOF */

  .ct-proof__box {
    padding: 36px 22px;
  }

  .ct-proof__grid {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 32px;
  }

  .ct-proof__item {
    padding: 25px 22px;
  }

  .ct-proof__item h3 {
    font-size: 18px;
  }

  .ct-proof__item p {
    font-size: 13px;
  }

  .ct-proof__note {
    margin-top: 25px;
    text-align: left;
    font-size: 13px;
  }


  /* FAQ */

  .ct-faq__list {
    margin-top: 35px;
  }

  .ct-faq__item summary {
    padding: 20px 42px 20px 32px;
    font-size: 14px;
    line-height: 1.65;
  }

  .ct-faq__item summary::before {
    left: 4px;
    top: 19px;
    font-size: 15px;
  }

  .ct-faq__item summary::after {
    top: 18px;
    right: 8px;
    font-size: 21px;
  }

  .ct-faq__answer {
    padding: 0 18px 22px 32px;
  }

  .ct-faq__answer p {
    padding-left: 24px;
    font-size: 13px;
    line-height: 1.85;
  }


  /* RELATED */

  .ct-related__grid {
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 35px;
  }

  .ct-related__card {
    min-height: auto;
    padding: 24px 22px;
  }

  .ct-related__card > span {
    margin-bottom: 10px;
  }

  .ct-related__card h3 {
    margin-bottom: 9px;
    font-size: 17px;
  }

  .ct-related__card p {
    font-size: 13px;
  }

  .ct-related__link {
    margin-top: 17px;
    padding-top: 0;
    font-size: 13px;
  }


  /* FINAL */

  .ct-final__box h2 {
    margin-bottom: 25px;
    font-size: 26px;
    line-height: 1.55;
    text-wrap: balance;
  }

  .ct-final__box p {
    font-size: 14px;
    line-height: 1.9;
  }

}


/* =========================================================
   VERY SMALL MOBILE
========================================================= */

@media screen and (max-width: 390px) {

  .ct-intro,
  .ct-about,
  .ct-questions,
  .ct-design,
  .ct-cases,
  .ct-methods,
  .ct-focus,
  .ct-layers,
  .ct-output,
  .ct-process,
  .ct-scale,
  .ct-boundary,
  .ct-difference,
  .ct-proof,
  .ct-faq,
  .ct-related,
  .ct-final {
    padding: 52px 0;
  }

  .ct-about__text,
  .ct-about__message,
  .ct-question-card,
  .ct-case-card,
  .ct-method-card,
  .ct-layer-card,
  .ct-scale__item,
  .ct-boundary__box,
  .ct-difference__item,
  .ct-proof__item,
  .ct-related__card {
    padding-left: 20px;
    padding-right: 20px;
  }

  .ct-final__box h2 {
    font-size: 23px;
  }

}
/* =========================================================
   PC｜6STEP DESIGN FLOW ALIGNMENT
========================================================= */

@media screen and (min-width: 1101px) {

  .ct-design__flow {
    align-items: stretch;
  }

  .ct-design__item {
    height: 100%;
  }

  .ct-design__arrow {
    display: flex;
    align-items: center;
    justify-content: center;
  }

}
/* =========================================================
   SP｜SECTION TITLE WRAP ADJUSTMENT
========================================================= */

@media screen and (max-width: 768px) {

  .ct-questions .parts-title h2,
  .ct-cases .parts-title h2 {
    font-size: 28px;
    line-height: 1.55;
    letter-spacing: 0;
    text-wrap: balance;
  }

}

@media screen and (max-width: 390px) {

  .ct-questions .parts-title h2,
  .ct-cases .parts-title h2 {
    font-size: 26px;
  }

}
/* =========================================================
   SP｜STARTING QUESTIONS TITLE FINAL ADJUSTMENT
========================================================= */

@media screen and (max-width: 768px) {

  .ct-questions .parts-title h2 {
    font-size: 24px;
    line-height: 1.55;
    letter-spacing: 0;
    text-wrap: wrap;
  }

}