@media (max-width: 600px) {
  #main-footer {
    padding: 34px 7px 30px 7px;
    max-width: 96vw;
    margin-bottom: 18vw;
  }
  .footer-title {
    font-size: 1.3rem;
  }
  .footer-cta {
    font-size: 1.08rem;
    min-width: 130px;
    padding: 15px 0;
  }
  .footer-desc {
    font-size: 0.96rem;
    max-width: 99vw;
  }
}

@media (max-width: 600px) {
  #corner-copyright {
    right: 12px;
    bottom: 12px;
    font-size: 0.89rem;
    padding: 7px 13px;
  }
}

@media (max-width: 768px) {
  #logo-fixed {
    position: relative;
    top: 0;
    left: 0;
    margin: 18px auto 10px auto;
    text-align: center;
  }
  #logo-fixed .logo {
    max-width: 80px;
    margin: 0 auto;
  }

  #menu {
    position: relative;
    top: 0;
    right: 0;
    margin: 0 auto 24px auto;
    width: calc(100% - 28px);
    max-width: 470px;
    padding: 0 8px;
    justify-content: center;
    flex-wrap: nowrap;
    gap: clamp(12px, 4vw, 20px);
    overflow-x: auto;
  }
  #menu a {
    margin: 0;
    padding: 8px 0;
    font-size: clamp(0.82rem, 3.2vw, 0.95rem);
    flex: 0 0 auto;
    min-width: 0;
    text-align: center;
    white-space: nowrap;
  }
  #menu #lang-switch {
    flex: 0 0 auto;
    margin-left: 0;
  }

  #menu::-webkit-scrollbar {
    display: none;
  }

  #menu {
    scrollbar-width: none;
  }

  #lang-switch {
    position: fixed;
    top: 14px;
    right: 14px;
    z-index: 1600;
  }
  #lang-menu {
    min-width: 120px;
    top: 34px;
    z-index: 1590;
  }

  .section {
    margin: 12vw auto;
    padding: 40px 18px;
    max-width: 92vw;
    border-radius: 6vw;
  }

  #hero {
    margin-top: 40px;
    padding: 0 12px;
  }
  #hero h1 {
    font-size: 2rem;
  }
  #hero p {
    font-size: 1rem;
  }
  #hero .cta {
    margin-bottom: 40px;
  }

  .cta {
    font-size: 1rem;
    padding: 12px 24px;
    border-radius: 12px;
  }

  .chat-input-area {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px;
  }
  .chat-input-area input[type="text"] {
    width: 100%;
    padding: 12px;
    border-radius: 12px;
    border: none;
    font-size: 1rem;
    outline: none;
  }
  .chat-input-area button {
    align-self: flex-end;
    padding: 10px 24px;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 12px;
    cursor: pointer;
  }

  #main-footer {
    margin: 14vw auto;
    padding: 28px 14px;
    max-width: 94vw;
    border-radius: 6vw;
  }
  .footer-title {
    font-size: 1.4rem;
  }
  .footer-cta {
    font-size: 1rem;
    padding: 14px 0;
    border-radius: 12px;
  }
  .footer-desc {
    font-size: 0.95rem;
  }

  #corner-copyright {
    position: relative;
    margin: 24px auto 0 auto;
    text-align: center;
    display: block;
    font-size: 0.85rem;
    padding: 8px 14px;
  }

  .social-widget {
    display: none;
  }

  .social-section {
    display: block;

    margin: 14vw auto 0;
    padding: 32px 18px;
    max-width: 520px;
    border-radius: 24px;
    background: rgba(12, 18, 30, 0.9);
    border: 1px solid rgba(90, 140, 255, 0.28);
    box-shadow: 0 18px 42px rgba(6, 12, 28, 0.35);
  }

  .social-section__links {
    flex-wrap: wrap;
    gap: clamp(14px, 5vw, 22px);
  }

  .social-section__link {
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 768px) {
  #intro section[data-chat] > div + div {
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    border-radius: 18px !important;
    gap: 10px !important;
    padding: 12px !important;
  }

  /* Поле ввода */
  #intro section[data-chat] > div + div input[type="text"] {
    border-radius: 12px !important;
    padding: 12px 16px !important;
    font-size: 1rem !important;
  }

  /* Кнопка */
  #intro section[data-chat] > div + div button {
    width: 100% !important;
    margin-left: 0 !important;
    border-radius: 12px !important;
    padding: 12px 0 !important;
    font-size: 1rem !important;
    align-self: center !important;
  }
}

@media (max-width: 768px) {
  #intro section[data-chat] > div + div button {
    width: 80% !important;
    margin-left: 0 !important;
    border-radius: 9999px !important;
    padding: 14px 0 !important;
    font-size: 1rem !important;
    align-self: center !important;
  }
}

@media (max-width: 1040px) {
  .platform-overview,
  .insight-showcase,
  .global-impact {
    padding: 48px 22px;
  }
  .pricing-main {
    padding: 0 22px 100px;
  }
  .platform-overview__grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .platform-overview__highlights {
    flex-direction: column;
  }
  .global-impact__content {
    padding: 46px 34px;
  }
}

@media (max-width: 900px) {
  .features-hero {
    padding: 48px 34px;
  }
  .features-main {
    padding: 0 22px 90px;
  }
  .features-grid {
    padding-left: 64px;
  }
}

@media (max-width: 680px) {
  .features-hero {
    padding: 42px 26px;
  }
  .features-hero h1 {
    font-size: 2.2rem;
  }
  .features-hero__cta {
    flex-direction: column;
    align-items: stretch;
  }
  .features-hero__cta .cta {
    width: 100%;
    text-align: center;
  }
  .features-grid {
    padding-left: 42px;
    gap: 28px;
  }
  .feature-card {
    padding: 30px 26px 30px 52px;
  }
  .feature-card::before {
    left: -48px;
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
  }
  .feature-card:not(:last-child)::after {
    left: -26px;
  }
  .platform-overview,
  .insight-showcase,
  .global-impact {
    margin-top: 90px;
    padding: 46px 20px;
  }
  .pricing-hero {
    padding: 42px 32px;
  }
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card {
    padding: 30px 26px;
  }
  .pricing-notes {
    padding: 40px 30px;
  }
  .insight-showcase__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .features-main {
    margin: 120px auto 80px auto;
    padding: 0 18px 80px;
  }
  .features-hero h1 {
    font-size: 2rem;
  }
  .features-hero__excerpt {
    font-size: 1.05rem;
  }
  .features-grid {
    padding-left: 0;
  }
  .features-grid::before {
    display: none;
  }
  .feature-card {
    padding: 26px 22px;
  }
  .feature-card::before,
  .feature-card:not(:last-child)::after {
    display: none;
  }
  .feature-card h2 {
    font-size: 1.3rem;
  }
  .features-closing {
    padding: 36px 24px;
  }
  .global-impact__content {
    padding: 38px 24px;
  }
  .pricing-main {
    padding: 0 18px 80px;
  }
  .pricing-hero {
    padding: 36px 24px;
  }
  .pricing-card {
    padding: 26px 22px;
  }
  .pricing-card__price {
    font-size: 1.9rem;
  }
  .pricing-notes {
    padding: 32px 22px;
  }
  .error-page__wrap {
    padding: 36px 24px;
  }
}