html, body { height: 100%; margin: 0; padding: 0; }
    body { font-family: 'Montserrat', sans-serif; background: #222; }
    .hero {
      position: relative;
      height: 100vh;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .hero video {
      position: absolute;
      top: 0; left: 0; width: 100vw; height: 100vh; object-fit: cover;
      z-index: 1;
      transition: opacity 1s;
      opacity: 0;
      background: #111;
      pointer-events: none;
      width: 100vw;
      height: 100vh;
      min-width: 100%;
      min-height: 100%;
      object-fit: cover;
    }
    .hero video.active { opacity: 1; z-index: 2; }
    .overlay {
      position: absolute; top: 0; left: 0; width: 100vw; height: 100vh;
      background: linear-gradient(90deg, rgba(34,34,34,0.75) 60%, rgba(0,0,0,0.5) 100%);
      z-index: 3;
    }
    .hero-content {
      position: relative; z-index: 4;
      color: #fff; text-align: left;
      max-width: 650px;
      margin-left: 5vw;
      animation: fadeInUp 1.5s cubic-bezier(.4,0,.2,1);
    }
    .hero-title {
      font-size: 3.2rem; font-weight: 700;
      line-height: 1.1; margin-bottom: 1.2rem;
      letter-spacing: -2px;
    }
    .hero-subtitle {
      font-size: 1.5rem; font-weight: 400;
      margin-bottom: 2.2rem;
    }
    .hero-btn {
      padding: 1rem 2.5rem;
      font-size: 1.2rem; font-weight: 600;
      background: #ffe600;
      color: #222; border: none; border-radius: 35px;
      cursor: pointer;
      box-shadow: 0 4px 16px rgba(0,0,0,0.18);
      transition: background 0.3s;
    }
    .hero-btn:hover { background: #ffc800; }
    @keyframes fadeInUp {
      0% { opacity: 0; transform: translateY(60px);}
      100% { opacity: 1; transform: translateY(0);}
    }
    @media (max-width: 700px) {
      .hero-title { font-size: 2.2rem; }
      .hero-content { margin-left: 2vw; }
    }
	@media (max-width: 900px) {
  .hero-title {
    font-size: 1.6rem;
    line-height: 1.15;
  }
  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 1.2rem;
  }
  .hero-content {
    margin-left: 1vw;
    max-width: 95vw;
  }
  .hero-btn {
    font-size: 1rem;
    padding: 0.7rem 1.7rem;
  }
}

@media (max-width: 600px) {
  .hero-content {
    margin-left: 0;
    padding: 10vw 4vw;
    text-align: center;
  }
  .hero-title {
    font-size: 1.4rem;
    margin-bottom: 0.7rem;
  }
  .hero-subtitle {
    font-size: 0.92rem;
    margin-bottom: 1rem;
  }
  .hero-btn {
    width: 100%;
    border-radius: 18px;
    font-size: 0.98rem;
    padding: 0.9rem 0;
  }
}

.advantages {
  padding: 64px 0 32px 0;
  background: #f8f9fb;
}
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}
.section-title {
  font-size: 2.4rem;
  text-align: center;
  margin-bottom: 2.5rem;
  font-weight: 700;
  color: #222;
  letter-spacing: -1px;
}
.advantages-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px 24px;
}
.adv-card {
  background: #fff;
  border-radius: 24px;
  box-shadow: 0 2px 18px 0 rgba(36,36,36,0.07);
  padding: 36px 22px 26px 22px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: box-shadow .3s;
  flex: 1 1 250px;
  max-width: 350px;
  min-width: 220px;
}
.adv-card:hover {
  box-shadow: 0 6px 32px 0 rgba(36,36,36,0.14);
}
.adv-icon {
  font-size: 2.7rem;
  margin-bottom: 1rem;
}
.adv-title {
  font-size: 1.22rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #222;
}
.adv-text {
  font-size: 1rem;
  color: #555;
}

.advantages-grid:only-child,
.advantages-grid:has(.adv-card:only-child) {
  justify-content: center;
  grid-template-columns: 1fr;
}

@media (max-width: 800px) {
  .advantages-grid { gap: 18px 10px; }
  .section-title { font-size: 1.55rem; }
  .adv-card { padding: 22px 8px 18px 8px; border-radius: 16px; }
}

@media (max-width: 480px) {
  .advantages { padding: 34px 0 14px 0; }
  .section-title { margin-bottom: 1.2rem; }
  .advantages-grid { grid-template-columns: 1fr; }
  .adv-card { padding: 16px 4px 12px 4px; }
  .adv-icon { font-size: 2rem; }
}
.cases {
  padding: 64px 0 40px 0;
  background: #f8f9fb;
}
.section-title {
  font-size: 2.1rem;
  text-align: center;
  margin-bottom: 1.1rem;
  font-weight: 700;
  color: #222;
  letter-spacing: -1px;
}
.section-subtitle {
  font-size: 1.1rem;
  text-align: center;
  color: #555;
  margin-bottom: 2.1rem;
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px 18px;
  justify-items: center;
}
.case-item {
  background: #fff;
  border-radius: 18px;
  box-shadow: 0 2px 16px 0 rgba(36,36,36,0.10);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: box-shadow .2s;
  max-width: 420px;
  width: 100%;
}
.case-item:hover {
  box-shadow: 0 6px 32px 0 rgba(36,36,36,0.18);
}
.case-item img,
.case-item video {
  width: 100%;
  display: block;
  object-fit: cover;
  
  background: #eee;
}
.case-item video {
  background: #222;
}
.case-caption {
  font-size: 1rem;
  color: #333;
  text-align: center;
  padding: 10px 14px 14px 14px;
  background: #fff;
}
@media (max-width: 800px) {
  .cases-grid {
    gap: 14px 8px;
    grid-template-columns: 1fr 1fr;
  }
  .case-item img,
  .case-item video { height: 150px; }
}
@media (max-width: 540px) {
  .cases { padding: 24px 0 18px 0; }
  .cases-grid { grid-template-columns: 1fr; }
  .case-item img,
  .case-item video { height: 42vw; min-height: 110px; }
}
.feedback {
  padding: 58px 0 40px 0;
  background: #fff;
}
.section-title {
  font-size: 2.1rem;
  text-align: center;
  margin-bottom: 1rem;
  font-weight: 700;
  color: #222;
  letter-spacing: -1px;
}
.section-subtitle {
  font-size: 1.07rem;
  text-align: center;
  color: #555;
  margin-bottom: 2.0rem;
}
.feedback-form {
  max-width: 420px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.form-row {
  width: 100%;
}
.feedback-form input,
.feedback-form textarea {
  width: 100%;
  font-size: 1.07rem;
  padding: 14px 14px;
  border: 1.3px solid #E6E6E6;
  border-radius: 12px;
  background: #f8f9fb;
  color: #222;
  transition: border 0.2s;
  resize: none;
  font-family: inherit;
}
.feedback-form input:focus,
.feedback-form textarea:focus {
  border-color: #ffe600;
  outline: none;
  background: #fffde9;
}
.feedback-form textarea {
  min-height: 70px;
  max-height: 180px;
}
.form-btn {
  padding: 1.05rem 0;
  width: 100%;
  background: #ffe600;
  border: none;
  border-radius: 12px;
  font-size: 1.16rem;
  font-weight: 600;
  color: #222;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  transition: background 0.2s;
}
.form-btn:hover { background: #ffc800; }
.form-policy {
  text-align: center;
  font-size: 0.92rem;
  color: #AAA;
  margin-top: 6px;
}
.form-policy a {
  color: #888; text-decoration: underline;
}
@media (max-width: 600px) {
  .feedback { padding: 24px 0 14px 0; }
  .feedback-form { max-width: 100%; }
}