.about-us {
  direction: rtl;
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 4rem) var(--header-pad-x, 1.25rem) clamp(2.5rem, 5vw, 4rem);
  background: #ffffff;
}

.about-us::before {
  content: "";
  position: absolute;
  inset: -4% -2% -6% -2%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.34;
  filter: blur(5px);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1600 680' fill='none'%3E%3Cpath d='M1600 90 C 1410 92 1240 215 1080 332 C 900 462 700 540 500 515 C 300 492 140 560 0 640' stroke='%23006dff' stroke-width='16' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.about-us::after {
  content: "";
  position: absolute;
  inset: -4% -2% -6% -2%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.64;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1600 680' fill='none'%3E%3Cpath d='M1600 90 C 1410 92 1240 215 1080 332 C 900 462 700 540 500 515 C 300 492 140 560 0 640' stroke='%23339cff' stroke-width='3.6' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.about-us__container {
  position: relative;
  z-index: 1;
  max-width: 1320px;
  margin: 0 auto;
}

.about-us__title {
  margin: 0 0 1.2rem;
  font-size: clamp(1.8rem, 2.8vw, 2.4rem);
  line-height: 1.2;
  font-weight: 800;
  color: #151515;
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.55s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

/* کاروسل دکترها: وسط شفاف، دو کارت محو هر طرف (دسکتاپ)، لایه‌های دورتر نیمی زیرِ نزدیک‌تر */
.about-us__stage {
  position: relative;
  width: 100%;
  margin-top: 0.35rem;
}

.about-us__stack {
  position: relative;
  width: 100%;
  min-height: clamp(335px, 44vw, 465px);
  overflow: visible;
  touch-action: pan-y pinch-zoom;
}

/* فقط کارت فعال کلیک‌پذیر */
.about-us.about-us--stack .about-us__stack .about-card:not(.about-card--active) {
  pointer-events: none !important;
}

.about-us.about-us--stack .about-us__stack .about-card--active {
  isolation: isolate;
}

.about-us.about-us--stack .about-us__stack .about-card--active .about-card__media {
  cursor: grab;
  touch-action: none;
}

.about-us.about-us--stack .about-us__stack .about-card--active .about-card__media:active {
  cursor: grabbing;
}

.about-card {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  min-height: clamp(265px, 36vw, 372px);
  border: 1px solid #d9d9dd;
  border-radius: 0 38px 0 0;
  overflow: hidden;
  background: #fff;
}

.about-us.is-visible .about-us__title {
  opacity: 1;
  transform: translateY(0);
}

.about-us.about-us--stack .about-us__stack .about-card {
  flex: none;
  position: absolute;
  left: 50%;
  top: 0;
  margin: 0;
  width: clamp(420px, 95vw, 960px);
  transform-origin: 50% 0;
  transition:
    transform 0.52s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.45s ease,
    filter 0.45s ease,
    box-shadow 0.45s ease;
}

.about-us.about-us--stack .about-us__stack .about-card--active {
  z-index: 50;
  transform: translate(-50%, 0) scale(1);
  opacity: 1;
  filter: none;
  pointer-events: auto;
  box-shadow:
    0 26px 60px rgba(16, 24, 40, 0.18),
    0 0 0 1px rgba(15, 20, 30, 0.05);
}

/* نزدیک‌ترهای وسط؛ بالاتر از کارت دورتر تا «نیمه زیرِ جلوتر» دیده شود */
.about-us.about-us--stack .about-us__stack .about-card--peek-l1 {
  z-index: 36;
  transform: translate(calc(-50% - min(34vw, 300px)), 0.95rem) scale(0.82);
  opacity: 0.32;
  filter: blur(0.65px);
  pointer-events: none;
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.09);
}

.about-us.about-us--stack .about-us__stack .about-card--peek-r1 {
  z-index: 36;
  transform: translate(calc(-50% + min(34vw, 300px)), 0.95rem) scale(0.82);
  opacity: 0.32;
  filter: blur(0.65px);
  pointer-events: none;
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.09);
}

.about-us.about-us--stack .about-us__stack .about-card--peek-l2 {
  z-index: 22;
  transform: translate(calc(-50% - min(54vw, 440px)), 1.85rem) scale(0.72);
  opacity: 0.18;
  filter: blur(1.05px);
  pointer-events: none;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.06);
}

.about-us.about-us--stack .about-us__stack .about-card--peek-r2 {
  z-index: 22;
  transform: translate(calc(-50% + min(54vw, 440px)), 1.85rem) scale(0.72);
  opacity: 0.18;
  filter: blur(1.05px);
  pointer-events: none;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.06);
}

.about-us.about-us--stack .about-us__stack .about-card--hidden {
  z-index: 0;
  transform: translate(-50%, 3.25rem) scale(0.64);
  opacity: 0;
  filter: blur(8px);
  pointer-events: none;
}

.about-us__controls {
  position: relative;
  z-index: 80;
  pointer-events: auto;
  margin-top: 1.95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.about-us__controls-start {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.55rem;
}

.about-us__more-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  color: #151515;
  text-decoration: none;
  cursor: pointer;
  pointer-events: auto;
  touch-action: manipulation;
}

.about-us__more-btn:hover .about-card__arrow,
.about-us__more-btn:focus-visible .about-card__arrow {
  transform: translateX(-3px);
}

.about-us__more-btn:focus-visible {
  outline: 2px solid #7c2be8;
  outline-offset: 3px;
  border-radius: 4px;
}

.about-us__counter {
  font-size: 1.05rem;
  font-weight: 700;
  color: #111218;
}

.about-us__nav {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}

.about-us__nav-btn {
  width: 48px;
  height: 48px;
  border-radius: 0 30px 0 0;
  border: 2px solid #7c2be8;
  background: #fff;
  color: #7c2be8;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease;
}

.about-us__nav-btn:hover,
.about-us__nav-btn:focus-visible {
  background: rgba(124, 43, 232, 0.08);
  outline: none;
}

.about-us__nav-btn:active {
  transform: scale(0.98);
}

.about-card__media {
  /* دسکتاپ: دایره جمع‌وجورتر؛ موبایل در بریک‌پوینت ۶۴۰px بازنویسی می‌شود */
  --about-photo-size: clamp(184px, 22vw, 268px);
  flex: 0 0 var(--about-photo-size);
  width: var(--about-photo-size);
  height: var(--about-photo-size);
  aspect-ratio: 1;
  align-self: center;
  object-fit: cover;
  object-position: center center;
  display: block;
  margin: clamp(0.72rem, 1.55vw, 1.2rem) clamp(0.95rem, 2vw, 1.55rem);
  border-radius: 50%;
  border: 4px solid rgba(124, 43, 232, 0.14);
  box-shadow:
    0 16px 44px rgba(16, 24, 40, 0.14),
    0 0 0 1px rgba(15, 20, 30, 0.06);
}

.about-card__body {
  display: flex;
  flex: 1 1 auto;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: clamp(0.92rem, 1.75vw, 1.42rem) clamp(1.15rem, 2.2vw, 1.85rem)
    clamp(0.92rem, 1.75vw, 1.42rem) clamp(1.25rem, 2.35vw, 2rem);
}

.about-card__title {
  margin: 0 0 0.35rem;
  font-size: clamp(1.2rem, 1.85vw, 1.55rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: #101114;
}

.about-card__meta {
  margin: 0 0 0.65rem;
  font-size: clamp(0.88rem, 1.05vw, 0.98rem);
  font-weight: 500;
  color: #7b7f88;
}

.about-card__text {
  margin: 0;
  font-size: clamp(0.98rem, 1.15vw, 1.08rem);
  line-height: 1.65;
  color: #2c2f36;
}

.about-card__extras {
  margin: 0.55rem 0 0;
  padding: 0 1.1rem 0 0;
  list-style: disc;
  list-style-position: outside;
  font-size: clamp(0.86rem, 0.98vw, 0.97rem);
  line-height: 1.55;
  color: #3d424a;
}

.about-card__extras li {
  margin: 0.3rem 0;
  padding-inline-start: 0.15rem;
}

.about-card__extras li::marker {
  color: #7c2be8;
}

.about-card__link {
  position: relative;
  z-index: 100;
  margin-top: auto;
  padding: clamp(0.78rem, 1.4vw, 1.12rem) 0 clamp(0.35rem, 0.8vw, 0.5rem);
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: clamp(1.05rem, 1.2vw, 1.18rem);
  font-weight: 700;
  color: #151515;
  text-decoration: none;
  cursor: pointer;
  pointer-events: auto;
  touch-action: manipulation;
}

.about-card--active .about-card__body {
  position: relative;
  z-index: 55;
  pointer-events: auto;
  -webkit-user-select: text;
  user-select: text;
}

.about-card__arrow {
  color: #7c2be8;
  transform: translateX(0);
  transition: transform 0.2s ease;
}

.about-card:hover .about-card__arrow,
.about-card__link:focus-visible .about-card__arrow {
  transform: translateX(-3px);
}

.about-card__link:focus-visible {
  outline: 2px solid #7c2be8;
  outline-offset: 3px;
  border-radius: 4px;
}

@media (max-width: 900px) {
  .about-us.about-us--stack .about-us__stack .about-card--peek-l2,
  .about-us.about-us--stack .about-us__stack .about-card--peek-r2 {
    /* موبایت/تابلت: همان سناریوی قبلی؛ فقط دو کارت محو کنار مرکز */
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, 3.4rem) scale(0.62);
    z-index: 0;
    pointer-events: none;
    filter: blur(12px);
  }
}

@media (max-width: 640px) {
  /* تصویر بالا، متن زیر؛ پارagraph و لیست هم‌تراز با خط آخر چسبیده به راست */
  .about-card {
    flex-direction: column;
    align-items: stretch;
    min-height: 0;
  }

  .about-card__body {
    justify-content: flex-start;
    flex: 1 1 auto;
    width: 100%;
    padding: 0 1rem 1rem;
    box-sizing: border-box;
  }

  .about-card__title,
  .about-card__meta {
    text-align: right;
    text-align-last: right;
  }

  .about-card__text {
    text-align: justify;
    text-align-last: right;
    text-justify: inter-word;
  }

  .about-card__extras {
    text-align: justify;
    text-align-last: right;
    text-justify: inter-word;
    padding: 0 1.15rem 0 0;
    margin-top: 0.45rem;
  }

  .about-card__extras li {
    text-align: justify;
    text-align-last: right;
    text-justify: inter-word;
  }

  .about-card__link {
    align-self: flex-start;
    margin-top: 0.65rem;
    padding-top: 0.65rem;
  }

  .about-us.about-us--stack .about-us__stack .about-card {
    width: min(96vw, 960px);
  }

  .about-us.about-us--stack .about-us__stack .about-card--peek-l1 {
    transform: translate(calc(-50% - min(56px, 16vw)), 0.85rem) scale(0.78);
    opacity: 0.3;
    filter: blur(0.55px);
  }

  .about-us.about-us--stack .about-us__stack .about-card--peek-r1 {
    transform: translate(calc(-50% + min(56px, 16vw)), 0.85rem) scale(0.78);
    opacity: 0.3;
    filter: blur(0.55px);
  }

  .about-us__stack {
    min-height: clamp(380px, 108vw, 560px);
  }

  .about-card__media {
    --about-photo-size: clamp(140px, 40vw, 248px);
    flex: 0 0 var(--about-photo-size);
    width: var(--about-photo-size);
    height: var(--about-photo-size);
    align-self: center;
    flex-shrink: 0;
    margin: 0.85rem auto 0.35rem;
    border-width: 3px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .about-us__title {
    opacity: 1;
    transform: none;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  .about-us.about-us--stack .about-us__stack .about-card {
    transition-duration: 0.02ms !important;
  }

  .about-us.about-us--stack .about-us__stack .about-card--peek-l1,
  .about-us.about-us--stack .about-us__stack .about-card--peek-r1,
  .about-us.about-us--stack .about-us__stack .about-card--peek-l2,
  .about-us.about-us--stack .about-us__stack .about-card--peek-r2 {
    filter: none;
  }
}