/* 1-on-1 pivot: immersive homepage hero, 1對1 advantage section, /courses/ promise + direct-booking card facts. */

/* ---------- Homepage hero: semi-immersive side planes ---------- */
.aia-hero--immersive .aia-hero__sides {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.aia-hero__side {
  position: absolute;
  top: 0;
  bottom: 0;
  width: clamp(280px, 31vw, 560px);
  margin: 0;
  overflow: hidden;
  animation: aia-oto-side-in 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.15s both;
}

.aia-hero__side--left {
  left: 0;
  --side-from: -28px;
  -webkit-mask-image:
    linear-gradient(90deg, #000 40%, transparent 97%),
    linear-gradient(180deg, transparent 0%, #000 14%, #000 78%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image:
    linear-gradient(90deg, #000 40%, transparent 97%),
    linear-gradient(180deg, transparent 0%, #000 14%, #000 78%, transparent 100%);
  mask-composite: intersect;
}

.aia-hero__side--right {
  right: 0;
  --side-from: 28px;
  animation-delay: 0.3s;
  -webkit-mask-image:
    linear-gradient(270deg, #000 40%, transparent 97%),
    linear-gradient(180deg, transparent 0%, #000 14%, #000 78%, transparent 100%);
  -webkit-mask-composite: source-in;
  mask-image:
    linear-gradient(270deg, #000 40%, transparent 97%),
    linear-gradient(180deg, transparent 0%, #000 14%, #000 78%, transparent 100%);
  mask-composite: intersect;
}

.aia-hero__side picture,
.aia-hero__side img {
  display: block;
  width: 100%;
  height: 100%;
}

.aia-hero__side img {
  max-width: none;
  object-fit: cover;
  transform: scale(1.08);
  filter: saturate(0.92) contrast(1.02);
  animation: aia-oto-float 14s ease-in-out 1.2s infinite alternate;
}

.aia-hero__side--left img {
  object-position: 38% 40%;
}

.aia-hero__side--right img {
  object-position: 30% 55%;
  animation-delay: 2.4s;
}

.aia-hero__side::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(247, 253, 249, 0.1), rgba(230, 250, 240, 0.32)),
    radial-gradient(ellipse 90% 70% at 50% 40%, transparent 40%, rgba(243, 252, 246, 0.45) 100%);
  mix-blend-mode: normal;
}

.aia-hero__side-tag {
  position: absolute;
  z-index: 1;
  bottom: 27%;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.9rem 0.45rem 0.7rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(216, 240, 226, 0.95);
  box-shadow: 0 12px 30px rgba(18, 48, 31, 0.12);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--ink);
  font-size: 0.8125rem;
  font-weight: 600;
  white-space: nowrap;
  animation: aia-rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) 1s both;
}

.aia-hero__side--left .aia-hero__side-tag {
  left: clamp(1.25rem, 4vw, 3.5rem);
}

.aia-hero__side--right .aia-hero__side-tag {
  right: clamp(1.25rem, 4vw, 3.5rem);
  animation-delay: 1.15s;
}

.aia-hero__side-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(47, 214, 123, 0.2);
}

.aia-hero--immersive .aia-hero__inner::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 8% -6% 4%;
  background: radial-gradient(ellipse 60% 55% at 50% 50%, rgba(255, 255, 255, 0.86) 30%, rgba(255, 255, 255, 0) 72%);
  pointer-events: none;
}

.aia-hero--immersive .aia-hero__inner > * {
  position: relative;
}

.aia-hero--immersive .aia-hero__title-line2 {
  display: inline-block;
  margin-top: 0.3rem;
  font-size: 0.78em;
  line-height: 1.3;
}

.aia-hero__title-row {
  word-break: keep-all;
}

@keyframes aia-oto-side-in {
  from {
    opacity: 0;
    transform: translateX(var(--side-from, 0));
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes aia-oto-float {
  from {
    transform: scale(1.08) translateY(0);
  }
  to {
    transform: scale(1.08) translateY(-14px);
  }
}

@media (max-width: 1099px) {
  .aia-hero__side {
    width: 36vw;
    opacity: 0.55;
  }

  .aia-hero__side-tag {
    display: none;
  }
}

@media (max-width: 767px) {
  .aia-hero__side {
    top: 0;
    bottom: auto;
    height: 58%;
    width: 54vw;
  }

  .aia-hero__side--left {
    -webkit-mask-image: radial-gradient(ellipse 100% 90% at 0% 0%, #000 25%, transparent 72%);
    mask-image: radial-gradient(ellipse 100% 90% at 0% 0%, #000 25%, transparent 72%);
  }

  .aia-hero__side--right {
    -webkit-mask-image: radial-gradient(ellipse 100% 90% at 100% 0%, #000 25%, transparent 72%);
    mask-image: radial-gradient(ellipse 100% 90% at 100% 0%, #000 25%, transparent 72%);
  }

  @supports (mask-composite: intersect) {
    .aia-hero__side--left,
    .aia-hero__side--right {
      mask-composite: add;
    }
  }

  .aia-hero__side {
    opacity: 0.38;
  }

  .aia-hero--immersive .aia-hero__title-line2 {
    font-size: 0.86em;
  }
}

/* ---------- Homepage: 1對1 的優勢 ---------- */
.aia-oto {
  position: relative;
  overflow: clip;
  background:
    radial-gradient(ellipse 50% 60% at 92% 10%, rgba(47, 214, 123, 0.1), transparent 70%),
    linear-gradient(180deg, #ffffff 0%, var(--bg-soft) 100%);
}

.aia-oto::before {
  content: "1:1";
  position: absolute;
  top: clamp(1rem, 4vw, 3rem);
  right: clamp(-2rem, -1vw, 0rem);
  font-family: var(--font-display);
  font-size: clamp(9rem, 20vw, 18rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.06em;
  color: transparent;
  -webkit-text-stroke: 2px rgba(47, 214, 123, 0.14);
  pointer-events: none;
  user-select: none;
}

.aia-oto__wrap {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  gap: clamp(2.5rem, 5vw, 4.75rem);
  align-items: start;
}

.aia-oto__intro {
  position: sticky;
  top: 6.5rem;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.aia-oto__intro.is-inview {
  opacity: 1;
  transform: none;
}

.aia-oto__title {
  font-size: clamp(1.85rem, 3.3vw, 2.7rem);
  line-height: 1.25;
  word-break: keep-all;
  line-break: strict;
}

.aia-oto__lead {
  max-width: 34rem;
  margin: 1.15rem 0 0;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.95;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.aia-oto__compare {
  margin-top: 1.75rem;
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 18px 40px -28px rgba(18, 48, 31, 0.28);
}

.aia-oto__compare-row {
  display: grid;
  grid-template-columns: 5.75rem minmax(0, 1fr) minmax(0, 1fr);
  font-size: 0.9rem;
  line-height: 1.5;
}

.aia-oto__compare-row + .aia-oto__compare-row {
  border-top: 1px solid var(--line);
}

.aia-oto__compare-row > span {
  padding: 0.8rem 0.95rem;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.aia-oto__compare-row > span:first-child {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.82rem;
}

.aia-oto__compare-row > span:last-child {
  color: var(--muted);
}

.aia-oto__compare-row > .is-oto {
  position: relative;
  background: var(--green-soft);
  color: var(--ink);
  font-weight: 600;
  padding-left: 2.05rem;
}

.aia-oto__compare-row > .is-oto::before {
  content: "";
  position: absolute;
  left: 0.85rem;
  top: 1.05rem;
  width: 0.7rem;
  height: 0.38rem;
  border-left: 2px solid var(--green-deep);
  border-bottom: 2px solid var(--green-deep);
  transform: rotate(-45deg);
}

.aia-oto__compare-row--head > span {
  padding-block: 0.7rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.aia-oto__compare-row--head > .is-oto {
  background: var(--ink);
  color: #fff;
  padding-left: 0.95rem;
}

.aia-oto__compare-row--head > .is-oto::before {
  display: none;
}

.aia-oto__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1.35rem;
  margin-top: 1.6rem;
}

.aia-oto__btn {
  min-height: 3.1rem;
  padding: 0 1.6rem;
  font-size: 0.9rem;
}

.aia-oto__btn:hover {
  transform: translateY(-2px);
}

.aia-oto__link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--green-deep);
}

.aia-oto__note {
  margin: 0.85rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.7;
}

.aia-oto__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  overflow: hidden;
  box-shadow: 0 34px 70px -36px rgba(18, 48, 31, 0.3);
}

.aia-oto__item {
  position: relative;
  padding: 1.7rem 1.55rem 1.8rem;
  background: #fff;
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.6s ease,
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    background 0.3s ease,
    box-shadow 0.3s ease;
  transition-delay: var(--aia-reveal-delay, 0s), var(--aia-reveal-delay, 0s), 0s, 0s;
}

.aia-oto__list.is-inview .aia-oto__item {
  opacity: 1;
  transform: none;
}

.aia-oto__list.is-inview .aia-oto__item:hover {
  z-index: 1;
  transform: translateY(-4px);
  background: linear-gradient(160deg, #ffffff 0%, var(--green-soft) 100%);
  box-shadow: 0 22px 40px -22px rgba(31, 191, 102, 0.45);
  transition-delay: 0s;
}

.aia-oto__num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.35rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 1.3px rgba(31, 191, 102, 0.6);
  transition: color 0.3s ease;
}

.aia-oto__item:hover .aia-oto__num {
  color: var(--green);
}

.aia-oto__item-title {
  margin: 0.95rem 0 0.45rem;
  font-size: 1.06rem;
  word-break: keep-all;
}

.aia-oto__item-desc {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.8;
}

@media (max-width: 899px) {
  .aia-oto__wrap {
    grid-template-columns: 1fr;
  }

  .aia-oto__intro {
    position: static;
  }
}

@media (max-width: 599px) {
  .aia-oto__list {
    grid-template-columns: 1fr;
    border-radius: 1.2rem;
  }

  .aia-oto__item {
    padding: 1.35rem 1.2rem 1.45rem;
  }

  .aia-oto__compare-row {
    grid-template-columns: 4.5rem minmax(0, 1fr) minmax(0, 1fr);
    font-size: 0.82rem;
  }

  .aia-oto__compare-row > span {
    padding: 0.7rem 0.6rem;
  }

  .aia-oto__compare-row > .is-oto {
    padding-left: 1.6rem;
  }

  .aia-oto__compare-row > .is-oto::before {
    left: 0.55rem;
    top: 0.95rem;
    width: 0.6rem;
  }
}

/* ---------- /courses/: promise callout + direct booking ---------- */
.aia-courses-promise {
  display: flex;
  align-items: center;
  gap: 0.95rem;
  max-width: 36rem;
  margin: 1.25rem 0 0;
  padding: 1rem 1.25rem 1rem 1rem;
  border-radius: 1.1rem;
  background: linear-gradient(120deg, #e6faf0 0%, #f6fef9 100%);
  border: 1px solid rgba(47, 214, 123, 0.5);
  box-shadow: 0 16px 34px -20px rgba(31, 191, 102, 0.6);
  animation: aia-rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
}

.aia-courses-promise__icon {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  background: var(--green);
  color: #fff;
  box-shadow: 0 0 0 6px rgba(47, 214, 123, 0.18);
}

.aia-courses-promise__label {
  display: block;
  margin: 0 0 0.15rem;
  color: var(--green-deep);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.aia-page-hero--rich .aia-courses-promise__text {
  display: block;
  margin: 0;
  color: var(--ink);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  font-weight: 700;
  line-height: 1.55;
  word-break: keep-all;
}

.aia-course-card--v2 .aia-btn--wa-book {
  gap: 0.4rem;
}

@media (prefers-reduced-motion: reduce) {
  .aia-hero__side,
  .aia-hero__side img,
  .aia-hero__side-tag,
  .aia-courses-promise {
    animation: none;
  }

  .aia-oto__intro,
  .aia-oto__item {
    opacity: 1;
    transform: none;
    transition: none;
  }
}