:root {
  --font-Montserrat: "Montserrat";
  font-family: var(--font-sans);
}
body {
  line-height: normal;
  font-weight: normal;
}

.main_fv {
  text-align: center;
  background: url("../orabio_brush/img/Orabio_bg.png") center/cover no-repeat;
  padding: 64px 0;
}
.fv {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
}

/* ====== FEATURES section====== */
.features {
  padding: 40px 16px;
}
.features__inner {
  max-width: 1000px;
  margin: 0 auto;
}
.features__title {
  text-align: center;
  letter-spacing: 0.15em;
  font-weight: 500;
  font-size: clamp(22px, 3.6vw, 40px);
  color: #646567;
  margin: 0 0 24px;
}
.features__title span {
  font-weight: 400;
  font-size: 0.6em;
  color: #646567;
}
.features__item {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 40px;
  padding: 20px 20px 20px 60px;
  justify-content: center;
}
.features__item + .features__item {
  border-top: 1px solid #a3a3a3;
}
.features__img {
  flex-shrink: 0;
}

.features__img img {
  display: block;
  max-width: 150px;
  height: auto;
}
.features__body {
  flex: 1;
}
.features__name {
  font-size: 30px;
  font-weight: 700;
  color: #00a8c0;
  margin: 0 0 10px;
  letter-spacing: 0.1em;
}
.features__text {
  font-size: 20px;
  line-height: 1.5;
  color: #555555;
  margin: 0;
}
/* テストセクション */
:root {
  --rw-cyan: #00a8c0;
  --rw-gray: #646567;
  --rw-border: #d7e6ea;
}
.rwtest {
  padding: 70px 16px 90px;
  background: url("./img/orabio_brush_bg1.png") center/cover no-repeat;
}

.rwtest__inner {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
  background: #fff;
  padding: 30px;
}

.rwtest__title {
  font-size: 26px;
  letter-spacing: 0.18em;
  color: var(--rw-cyan);
  font-weight: 700;
  margin: 0 0 8px;
}

.rwtest__subtitle {
  font-size: 20px;
  color: var(--rw-gray);
  margin: 0 0 24px;
}

.rwtest__lead {
  font-size: 16px;
  line-height: 1.5;
  color: var(--rw-gray);
  margin: 0 0 26px;
}
.rwtest__condition {
  display: flex;
  align-items: stretch;
  justify-content: center;
  max-width: 780px;
  margin: 0 auto 40px;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid #d9eef2;
  background-color: #f7fcfd;
}

.rwtest__condition-label {
  flex: 0 0 120px;
  background-color: #dff4f8;
  color: var(--rw-cyan);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.rwtest__condition-text {
  flex: 1;
  padding: 12px 18px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--rw-gray);
  text-align: left;
  margin: 0;
}
.rwtest__list {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
}

.rwtest-card {
  flex: 1 1 0;
  text-align: center;
}

.rwtest-card__name {
  font-size: 18px;
  color: var(--rw-gray);
  margin: 0 0 10px;
}

.rwtest-card__time {
  display: inline-block;
  font-size: 11px;
  color: #ffffff;
  background-color: var(--rw-cyan);
  padding: 4px 12px;
  border-radius: 999px;
  margin: 0 0 10px;
}

.rwtest-card__image {
  margin-bottom: 10px;
  padding-left: 20px;
}

.rwtest-card__image img {
  display: block;
  width: 100%;
  max-width: 280px;
  margin: 0 auto;
  height: auto;
}
.rwtest-card__note {
  font-size: 11px;
  line-height: 1.6;
  margin: 0;
}

.rwtest-card__note + .rwtest-card__note {
  margin-top: 4px;
}

.rwtest-card__note--control {
  color: #555555;
}

.rwtest-card__note--test {
  color: var(--rw-cyan);
  font-weight: 700;
}
/* アルカリセクション */
:root {
  --main-cyan: #00a8c0;
  --text-gray: #646567;
  --border-light: #a3a3a3;
}

/* セクション全体 */
.alkali {
  padding: 70px 16px;
  background-color: #ffffff;
}

.alkali__inner {
  max-width: 900px;
  margin: 0 auto;
}

.alkali__title {
  text-align: center;
  font-size: 26px;
  letter-spacing: 0.18em;
  color: var(--main-cyan);
  font-weight: 700;
  background: #fff;
  margin: 0 auto -55px;
  max-width: 350px;
  height: 74px;
  position: relative;
  z-index: 999;
  padding: 0 10px;
}
.alkali__panel {
  border-radius: 10px;
  border: 1px solid var(--border-light);
  background-color: #ffffff;
  padding: 32px 20px 30px;
}
.alkali__content {
  display: flex;
  align-items: flex-start;
  gap: 32px;
}

.alkali__image {
  flex: 0 0 380px;
}

.alkali__image img {
  display: block;
  width: 100%;
  height: auto;
}

.alkali__text {
  flex: 1 1 auto;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-gray);
  margin-top: 20px;
}

.alkali__text p {
  margin: 0px;
}

.alkali__note {
  margin: 16px 4px 0;
  font-size: 15px;
  line-height: 1.8;
  color: #e7523d;
}
.material {
  text-align: center;
}
.material img {
  width: 100%;
  max-width: 891px;
  margin: 0 auto;
}
/* ご使用方法セクション */
:root {
  --usage-cyan: #00a8c0;
  --usage-gray: #646567;
}

/* USAGEセクション */
.usage {
  padding: 70px 16px;
  background-color: #ffffff;
}

.usage__inner {
  max-width: 900px;
  margin: 0 auto;
}
.usage__title {
  text-align: center;
  letter-spacing: 0.15em;
  font-weight: 500;
  font-size: clamp(22px, 3.6vw, 32px);
  color: #646567;
  margin: 0 0 40px;
}

.usage__title span {
  display: block;
  margin-top: 4px;
  font-weight: 400;
  font-size: 0.6em;
  color: #646567;
}
.usage-block {
  padding: 28px 0 32px;
}

.usage-block--bottom {
  border-top: 1px solid #e2e2e2;
}

.usage-block__heading {
  font-size: 30px;
  font-weight: 700;
  color: var(--usage-cyan);
  margin: 0 0 16px;
}
.usage-block__row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.usage-block__left {
  flex: 0 0 180px;
}

.usage-block__left img {
  display: block;
  width: 100%;
  height: auto;
}
.usage-block__center {
  margin: auto;
  text-align: center;
}
.usage-block__right {
  margin-left: 3%;
}
.usage-block__text {
  font-size: 13px;
  line-height: 1.5;
  color: var(--usage-gray);
  margin: 0 0 20px;
  max-width: 300px;
}

.usage-block__text--detail {
  margin-bottom: 16px;
  max-width: 375px;
  align-items: center;
}

.usage-block__diagram {
  width: 300px;
}

.usage-block__diagram img {
  display: block;
  height: auto;
  max-width: 300px;
  width: 300px;
}

.usage-block__diagram--bowl {
  margin-top: 10px;
  max-width: 200px;
}

.usage-block__right--photos {
  display: flex;
  flex-direction: column;
  margin-left: 3%;
}

.usage-block__photo img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 400px;
}

.usage-block__photo--wide img {
  max-width: 383px;
}
.usage-steps {
  display: flex;
  gap: 16px;
  margin-top: 10px;
  margin-bottom: 8px;
}

.usage-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.usage-step__num {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background-color: var(--usage-cyan);
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.usage-step__text {
  font-size: 11px;
  line-height: 1.6;
  color: var(--usage-gray);
  text-align: center;
  margin: 0;
}

/* ===== 製品情報セクション ===== */
.pinfo {
  position: relative;
  padding: 56px 16px 64px;
  isolation: isolate;
}
.pinfo__bg {
  position: absolute;
  inset: 0;
  background: url("./img/orabio_brush_bg2.png") center/cover no-repeat;
  z-index: -1;
  opacity: 0.9;
}

.pinfo__inner {
  max-width: 900px;
  margin: 0 auto;
}
.pinfo__title {
  text-align: center;
  letter-spacing: 0.15em;
  font-weight: 500;
  font-size: clamp(22px, 3.6vw, 32px);
  color: #646567;
  margin: 0 0 40px;
}
.pinfo__title small {
  display: block;
  margin-top: 8px;
  font-size: 0.6em;
  font-weight: 400;
  color: #646567;
}

.pinfo__card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.08);
  padding: 24px 28px 26px;
}

.pinfo__lead {
  text-align: center;
  margin: 0 0 16px;
  font-size: clamp(16px, 2.2vw, 24px);
  color: #646567;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-bottom: 1px solid #a3a3a3;
  padding-bottom: 16px;
}

.u-emp {
  position: relative;
  font-weight: 700;
  font-size: clamp(18px, 3.2vw, 32px);
  letter-spacing: 0.06em;
  color: #646567;
  text-shadow: 2px 0 0 #fff, -2px 0 0 #fff, 0 2px 0 #fff, 0 -2px 0 #fff,
    1px 1px 0 #fff, -1px 1px 0 #fff, 1px -1px 0 #fff, -1px -1px 0 #fff,
    0 4px 6px rgba(0, 0, 0, 0.35), 0 10px 20px rgba(0, 0, 0, 0.12);
}

.pinfo__grid {
  display: grid;
  gap: 32px;
  grid-template-columns: 400px 1fr;
  margin: 6px 0 0;
  align-items: start;
}
.pinfo__col {
  display: grid;
  gap: 12px;
}

.pinfo__row {
  display: grid;
  grid-template-columns: 180px 1fr;
  align-items: baseline;
  padding: 8px 0;
  border-bottom: 1px solid #a3a3a3;
}

.pinfo__dt {
  --accent: #00a8c0;
  margin: 0;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.03em;
  font-size: 18px;
}
.pinfo__dd {
  margin: 0;
  color: #646567;
  line-height: 1.5;
  font-size: 18px;
}
.pinfo__dd {
  display: flex;
  justify-content: space-between;
}
.pinfo__row_none {
  border: none;
  padding: 16px 0 0;
}
.pinfo__col_none {
  gap: 0;
}
.pinfo_note {
  font-size: 12px;
  color: #646567;
  text-align: right;
  margin-top: 14px;
}

/* 専門家セクション */
.experts {
  padding: 56px 16px;
}
.experts__inner {
  max-width: 1000px;
  margin: 0 auto;
}
.experts__banner {
  --tri: 20px;
  margin: 0 0 20px;
  padding: 12px 16px;
  text-align: center;
  background: #ecf6f6;
  border-radius: 10px;
  color: #646567;
  font-size: 24px;
  letter-spacing: 0.1em;
  position: relative;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}
.experts__banner b {
  color: #00a8c0;
}
.experts__banner::before,
.experts__banner::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(var(--tri) * -0.9);
  width: 0;
  height: 0;
  border-left: var(--tri) solid transparent;
  border-right: var(--tri) solid transparent;
}
.experts__banner::before {
  border-top: var(--tri) solid rgba(0, 0, 0, 0.06);
  bottom: calc(var(--tri) * -0.95);
}
.experts__banner::after {
  border-top: var(--tri) solid #ecf6f6;
}

.expert {
  margin: 0 0 34px;
}
.expert-head {
  display: grid;
  grid-template-columns: 270px 1fr;
}
.expert-photo {
  max-width: 272px;
  height: auto;
  object-fit: cover;
  border-radius: 8px;
}
.expert-info {
  padding-top: 50px;
}
.chips {
  margin: 0 0 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chip {
  padding: 4px 10px;
  font-size: 16px;
  border: 1px solid #646567;
  color: #646567;
  border-radius: 5px;
}
.chip--link {
  color: #00a8c0;
  text-decoration: none;
  font-size: 20px;
}
.chip_text {
  color: #646567;
  margin: 0;
  margin-bottom: 10px;
  margin-top: 10px;
  font-size: 16px;
}
.name {
  margin: 2px 0 10px;
  font-size: 32px;
  color: #646567;
}
.role {
  margin: 0;
  color: #646567;
  font-size: 20px;
}

.expert-comment {
  color: #646567;
  line-height: 2;
  font-size: 16px;
}
/* ===== CTASection ===== */
.cta-purchase {
  background: #ecf6f6;
  color: #646567;
}
.cta__inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: center;
  padding: 32px 0;
}
.cta__text p {
  margin: 0 0 12px;
  line-height: 1.9;
  font-size: 18px;
}
.cta__illust img {
  display: block;
  height: auto;
  max-width: 250px;
}
.btn-grad {
  --c1: #00a5bf;
  --c2: #0e77ba;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 260px;
  height: 52px;
  padding: 0 22px;
  color: #fff !important;
  text-decoration: none !important;
  background: linear-gradient(90deg, var(--c1), var(--c2));
  border-radius: 999px;
  box-shadow: 0 6px 16px rgba(14, 119, 186, 0.25);
  overflow: hidden;
  font-size: 18px;
}

/* ホバー演出*/
.btn-grad::after {
  content: "";
  position: absolute;
  inset: -40% -20%;
  background: linear-gradient(
    115deg,
    transparent 35%,
    rgba(255, 255, 255, 0.6) 50%,
    transparent 65%
  );
  transform: translateX(-120%);
  transition: transform 1.5s ease;
}
.btn-grad:hover::after {
  transform: translateX(120%);
}

.arr {
  font-size: 20px;
  line-height: 1;
}

/* アニメーション */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.65, 0.2, 1);
  will-change: transform, opacity;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
.reveal[data-ani="up"] {
  transform: translateY(22px);
}
.reveal[data-ani="left"] {
  transform: translateX(-22px);
}
.reveal[data-ani="right"] {
  transform: translateX(22px);
}
.reveal[data-ani="scale"] {
  transform: scale(0.98);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
}
.reveal[data-ani="left"] {
  transform: translateX(-22px);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
[data-stagger] > .reveal {
  transition-delay: calc(var(--i, 0) * 110ms);
}
/* SP */
@media (max-width: 768px) {
  .pc {
    display: none;
  }
  .main_fv {
    padding: 0;
  }
  /* featuresセクション */
  .features {
    padding: 0px 8px 40px;
  }
  .features__title {
    margin: 0 0 24px;
  }
  .features__item {
    gap: 10px;
  }
  .features__text {
    font-size: 12px;
  }
  .features__item {
    padding: 12px 0;
  }
  .features__img img {
    width: 75px;
  }
  .features__name {
    font-size: 14px;
    white-space: nowrap;
  }
  /* テストセクション */
  .rwtest {
    padding: 60px 12px;
  }
  .rwtest__inner {
    padding: 24px 10px;
  }
  .rwtest__title {
    font-size: 16px;
  }
  .rwtest__subtitle {
    font-size: 16px;
  }
  .rwtest__lead {
    font-size: 14px;
  }
  .rwtest__condition-label {
    flex: 0 0 80px;
    font-size: 18px;
  }
  .rwtest__condition-text {
    font-size: 14px;
    line-height: 1.5;
    padding: 10px;
  }
  .rwtest__list {
    flex-direction: column;
    gap: 10px;
  }
  .rwtest-card__image img {
    width: 280px;
    padding-left: 0;
  }
  /* アルカリセクション */
  .alkali__content {
    flex-direction: column;
    gap: 0;
  }
  .alkali__image {
    flex: 0 0 0px;
  }
  .alkali__panel {
    padding: 20px 10px;
  }
  .alkali__title {
    font-size: 18px;
    max-width: 250px;
  }
  .alkali__text p {
    font-size: 14px;
  }
  .alkali__note {
    font-size: 14px;
    line-height: 1.5;
  }
  .alkali__panel {
    border-radius: 0;
  }
  .material img {
    width: 92%;
  }
  /* USAGEセクション */
  .usage {
    padding: 30px 12px;
  }
  .usage-block__row {
    flex-direction: column;
  }
  .usage-block {
    padding: 20px 0;
  }
  .usage__title {
    margin-bottom: 24px;
  }
  .usage-block__heading {
    font-size: 24px;
    margin: auto;
    text-align: center;
  }
  .usage-block__left img {
    width: 220px;
    margin: 0 auto;
  }
  .usage-block__left {
    margin: 0 auto;
  }
  .usage-block__text {
    font-size: 14px;
    max-width: 350px;
  }
  .usage-block__diagram {
    margin: 0 auto;
  }
  .usage-block__diagram {
    max-width: 300px;
  }
  /* 製品情報セクション */
  .pinfo__title {
    margin: 0 0 24px;
  }
  .pinfo__grid {
    grid-template-columns: 1fr;
    gap: 5px;
  }
  .pinfo__row {
    grid-template-columns: 70px 1fr;
  }
  .pinfo__dt {
    font-size: 12px;
  }
  .pinfo__dd {
    font-size: 12px;
  }
  .pinfo__card {
    padding: 24px 12px;
  }
  .cert__badge {
    margin-top: 10px;
    max-width: 500px;
    width: 100%;
  }
  .pinfo_note {
    font-size: 10px;
    text-align: left;
    margin-top: 10px;
  }
  .cta__inner {
    display: flex;
    flex-direction: column-reverse;
    justify-content: center;
    text-align: center;
    gap: 0;
    padding-bottom: 24px;
  }
  .cta__illust img {
    width: 200px;
    margin-left: auto;
  }
  .cta__text p {
    font-size: 16px;
  }
}