/* О платформе: полноэкранные секции, цвета из темы, 3D и анимации */

.page-about {
  --landing-radius-xl: 1.5rem;
}

/* --- Снимаем ограничение ширины с main для полноэкранной страницы --- */
.page-about main {
  max-width: none;
  margin: 0;
  padding: 0;
  width: 100%;
  overflow-x: hidden;
}

.about-main {
  padding: 0;
  overflow-x: hidden;
}

/* --- Анимация появления: прорез + масштаб --- */
@keyframes about-reveal {
  0% {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* --- Hero: на весь экран по высоте и ширине --- */
/* Полноэкранные секции без ограничений от глобального section */
.page-about main .about-hero,
.page-about main .about-features-strip,
.page-about main .about-how-strip {
  margin-bottom: 0;
  border-radius: 0;
  box-shadow: none;
}

.about-hero {
  min-height: 95vh;
  width: 100%;
  padding: 5rem 1.5rem 6rem;
  background: var(--landing-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-hero-inner {
  max-width: 64rem;
  margin: 0 auto;
  text-align: center;
  animation: about-reveal 0.8s ease-out;
}

.about-hero-title {
  margin: 0 0 1rem;
  font-size: clamp(2.5rem, 8vw, 5.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.about-hero-line {
  display: block;
}
.about-hero-line--1 {
  color: var(--landing-foreground);
}
.about-hero-line--2 {
  color: var(--landing-spot);
}

.about-hero-lead {
  margin: 0;
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: var(--landing-muted);
  line-height: 1.6;
  max-width: 42rem;
  margin-left: auto;
  margin-right: auto;
}

/* --- Секция «Почему выбирают нас»: на всю ширину экрана --- */
.about-features-strip {
  padding: 4rem 1.5rem;
  width: 100%;
  background: var(--landing-surface-solid);
}

.about-features-inner {
  max-width: 75rem;
  margin: 0 auto;
}

.about-section-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--landing-foreground);
  text-align: center;
}

.about-section-title--left {
  text-align: left;
  color: var(--color-text);
}

/* В блоке преимуществ (светлый фон) заголовок должен быть хорошо виден */
.about-advantages .about-section-title--left {
  color: var(--color-primary-light);
}

.about-section-lead {
  margin: 0 0 3rem;
  font-size: 1.15rem;
  color: var(--landing-muted);
  text-align: center;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

.about-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  perspective: 1200px;
}
@media (min-width: 768px) {
  .about-features-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
  }
}

.about-feature-card {
  padding: 2rem;
  background: var(--color-background);
  border-radius: var(--landing-radius-xl);
  border: 1px solid transparent;
  transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.3s;
  transform-style: preserve-3d;
}
.about-feature-card:hover {
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
  border-color: var(--landing-spot);
  transform: perspective(1200px) rotateX(3deg) rotateY(3deg) translateZ(12px);
}

.about-feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  margin-bottom: 1.25rem;
  transition: transform 0.3s ease;
}
.about-feature-card:hover .about-feature-icon {
  transform: scale(1.08) translateZ(8px);
}

.about-feature-card--1 .about-feature-icon { color: var(--color-primary-light); }
.about-feature-card--2 .about-feature-icon { color: var(--color-secondary); }
.about-feature-card--3 .about-feature-icon { color: var(--color-accent); }
.about-feature-card--4 .about-feature-icon { color: var(--color-primary-light); }

.about-feature-card-title {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text);
}

.about-feature-card-text {
  margin: 0;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

html[data-theme="dark"] .about-feature-card {
  background: var(--color-surface-alt);
}

/* --- Преимущества --- */
.about-advantages {
  padding: 4rem 1.5rem;
  background: var(--color-background);
  width: 100%;
}

.about-advantages-inner {
  max-width: 75rem;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}
@media (min-width: 992px) {
  .about-advantages-inner {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
  }
}

.about-advantages-lead {
  margin: 0 0 1.5rem;
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.about-advantages-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.about-advantages-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
  color: var(--color-text);
  line-height: 1.4;
}

.about-check {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--color-primary-light);
  position: relative;
}
.about-check::after {
  content: "";
  position: absolute;
  left: 0.35rem;
  top: 0.15rem;
  width: 0.35rem;
  height: 0.6rem;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.about-advantages-cards {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  perspective: 1000px;
}

.about-advantage-card {
  padding: 2.5rem;
  border-radius: var(--landing-radius-xl);
  text-align: center;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  transform-style: preserve-3d;
}
.about-advantage-card:hover {
  transform: translateZ(12px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.about-advantage-card--primary {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
}

.about-advantage-card--surface {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
}

.about-advantage-icon {
  display: block;
  font-size: 2.5rem;
  margin-bottom: 1rem;
  opacity: 0.9;
}

.about-advantage-icon--shield {
  font-size: 2rem;
}

.about-advantage-card-title {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.about-advantage-card--primary .about-advantage-card-title {
  color: #fff;
}

.about-advantage-card-text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
}

.about-advantage-card--primary .about-advantage-card-text {
  opacity: 0.95;
}

.about-advantage-card--surface .about-advantage-card-text {
  color: var(--color-text-muted);
}

/* --- Как это работает: на всю ширину экрана, 3D карточки --- */
.about-how-strip {
  padding: 4rem 1.5rem;
  width: 100%;
  background: var(--landing-surface-solid);
}

.about-how-inner {
  max-width: 75rem;
  margin: 0 auto;
}

.about-how-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  perspective: 1000px;
}
@media (min-width: 768px) {
  .about-how-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.about-how-card {
  padding: 2rem;
  border-radius: var(--landing-radius-xl);
  color: #fff;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  transform-style: preserve-3d;
}
.about-how-card:hover {
  transform: perspective(1000px) rotateY(-6deg) translateZ(16px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.about-how-card--1 {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
}

.about-how-card--2 {
  background: linear-gradient(135deg, var(--landing-spot-secondary) 0%, #3d6de8 100%);
}

.about-how-card--3 {
  background: linear-gradient(135deg, var(--color-accent) 0%, #ffd4b8 100%);
  color: #1a1a1a;
}

.about-how-num {
  display: block;
  font-size: 3.5rem;
  font-weight: 900;
  opacity: 0.35;
  line-height: 1;
  margin-bottom: 1rem;
}

.about-how-card-title {
  margin: 0 0 0.75rem;
  font-size: 1.5rem;
  font-weight: 700;
}

.about-how-card-text {
  margin: 0;
  font-size: 0.95rem;
  opacity: 0.95;
  line-height: 1.55;
}

.about-how-card--3 .about-how-card-text {
  opacity: 0.9;
}

/* --- CTA --- */
.about-cta-strip {
  padding: 4rem 1.5rem;
  background: var(--color-background);
  width: 100%;
}

.about-cta-card {
  max-width: 48rem;
  margin: 0 auto;
  padding: 3rem 2rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  border-radius: var(--landing-radius-xl);
  text-align: center;
  box-shadow: 0 8px 32px rgba(42, 82, 152, 0.25);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.about-cta-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(42, 82, 152, 0.3);
}

.about-cta-title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
}

.about-cta-text {
  margin: 0 0 1.5rem;
  font-size: 1.05rem;
  opacity: 0.95;
  line-height: 1.5;
}

.about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.about-cta-btn {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--color-surface);
  color: var(--color-primary);
  border-radius: 9999px;
  font-weight: 600;
  font-size: 1.05rem;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.about-cta-btn:hover {
  transform: translateY(-2px) translateZ(4px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.about-cta-btn--ghost {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.about-cta-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
}