:root {
  --bg: #041126;
  --bg-soft: #0a1f3a;
  --card: rgba(9, 28, 54, 0.8);
  --line: rgba(152, 201, 255, 0.25);
  --text: #eaf3ff;
  --text-sub: #b8c9df;
  --primary: #3b9eff;
  --secondary: #31d0a1;
  --warning: #ffc56b;
  --radius: 16px;
  --shadow: 0 18px 45px rgba(2, 8, 18, 0.45);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  color: var(--text);
  font-family: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at 15% 10%, #0b2b51 0, var(--bg) 55%);
  scroll-behavior: smooth;
}

body {
  scroll-snap-type: y mandatory;
}

a {
  color: inherit;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: linear-gradient(180deg, rgba(4, 16, 32, 0.95), rgba(4, 16, 32, 0.78));
  border-bottom: 1px solid rgba(126, 177, 230, 0.2);
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1320px;
  margin: 0 auto;
  padding: 0.65rem 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
}

.brand__logo {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: inline-grid;
  place-items: center;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  background: linear-gradient(135deg, #34d1a1, #3b9eff);
  color: #fff;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.2;
}

.brand strong {
  font-size: 0.92rem;
}

.brand small {
  color: var(--text-sub);
  font-size: 0.72rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.45rem;
}

.nav a {
  text-decoration: none;
  font-size: 0.78rem;
  color: var(--text-sub);
  border: 1px solid rgba(137, 188, 241, 0.3);
  padding: 0.22rem 0.58rem;
  border-radius: 999px;
  transition: 0.2s ease;
}

.nav a:hover,
.nav a.active {
  color: #fff;
  border-color: rgba(128, 207, 255, 0.75);
  background: rgba(58, 132, 201, 0.3);
}

.progress {
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
}

.progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--secondary), var(--primary));
}

main {
  padding-top: 72px;
}

.slide {
  position: relative;
  min-height: 100vh;
  padding: 1rem;
  overflow: hidden;
  scroll-snap-align: start;
  opacity: 0.65;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.slide.active {
  opacity: 1;
  transform: translateY(0);
}

.slide__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(112deg, rgba(5, 15, 28, 0.85), rgba(5, 15, 28, 0.68));
}

.mask--light {
  background: linear-gradient(110deg, rgba(8, 25, 47, 0.78), rgba(8, 25, 47, 0.54));
}

.slide__content {
  position: relative;
  z-index: 2;
}

.container {
  width: min(1280px, 100%);
  min-height: calc(100vh - 96px);
  margin: 0 auto;
  display: grid;
  align-content: start;
  gap: 1rem;
}

.container.narrow {
  width: min(900px, 100%);
}

.grid-2 {
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 1rem;
}

.eyebrow {
  margin: 0;
  color: #95bce5;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p,
ul,
blockquote {
  margin: 0;
}

h1,
h2 {
  font-size: clamp(1.7rem, 3.5vw, 3rem);
  line-height: 1.25;
}

h3 {
  font-size: 1.08rem;
}

.lead {
  color: #d6e9ff;
  font-size: clamp(1.05rem, 2.1vw, 1.25rem);
}

.text-block,
.panel p,
.card p,
.industry-grid p,
.price-card p,
li,
cite,
.note,
small {
  color: var(--text-sub);
  line-height: 1.65;
}

.cta-row,
.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.btn {
  border-radius: 999px;
  border: 1px solid rgba(143, 199, 255, 0.4);
  padding: 0.56rem 1rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}

.btn--primary {
  border-color: transparent;
  background: linear-gradient(90deg, var(--secondary), var(--primary));
  color: #fff;
}

.btn--ghost {
  background: rgba(30, 75, 124, 0.35);
  color: #d8ecff;
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.pill-group span {
  padding: 0.38rem 0.78rem;
  border: 1px solid rgba(145, 194, 245, 0.35);
  border-radius: 999px;
  background: rgba(11, 35, 66, 0.45);
  color: #d6eafe;
  font-size: 0.85rem;
}

.panel {
  padding: 0.92rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
  display: grid;
  gap: 0.7rem;
}

.panel ul {
  padding-left: 1.15rem;
}

.panel--visual img,
.wide-media,
.card img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(143, 201, 255, 0.26);
  background: rgba(8, 24, 45, 0.62);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.82rem;
}

.card {
  padding: 0.8rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
  display: grid;
  gap: 0.55rem;
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.72rem;
}

.adv-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  box-shadow: var(--shadow);
  padding: 0.75rem;
}

.icon {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  font-size: 1.15rem;
  background: rgba(63, 158, 255, 0.18);
  border: 1px solid rgba(122, 191, 255, 0.45);
}

.quote-list {
  display: grid;
  gap: 0.7rem;
}

blockquote {
  margin: 0;
  padding: 0.75rem;
  border: 1px solid rgba(148, 202, 255, 0.24);
  border-radius: 12px;
  background: rgba(10, 32, 60, 0.45);
  display: grid;
  gap: 0.42rem;
}

blockquote strong {
  color: #dcf0ff;
  font-size: 0.96rem;
}

.industry-grid,
.pricing-grid {
  display: grid;
  gap: 0.75rem;
}

.industry-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.industry-grid article,
.price-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.75rem;
  background: var(--card);
}

.price-card {
  box-shadow: var(--shadow);
}

.price-card--highlight {
  border-color: rgba(103, 226, 187, 0.65);
  background: linear-gradient(180deg, rgba(20, 56, 90, 0.85), rgba(10, 35, 60, 0.82));
}

.price-card ul {
  margin-top: 0.4rem;
  padding-left: 1.1rem;
}

.pricing-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.note {
  font-size: 0.9rem;
}

.hint {
  color: var(--warning);
}

.lead-form {
  display: grid;
  gap: 0.55rem;
}

.lead-form label {
  display: grid;
  gap: 0.34rem;
  font-size: 0.9rem;
  color: #d8e9ff;
}

.lead-form input,
.lead-form textarea {
  width: 100%;
  border: 1px solid rgba(146, 198, 249, 0.35);
  border-radius: 10px;
  background: rgba(6, 21, 41, 0.64);
  color: #e4f0ff;
  padding: 0.56rem 0.6rem;
  font: inherit;
}

.contact-block {
  padding: 0.85rem;
  border: 1px solid rgba(143, 199, 255, 0.24);
  border-radius: 12px;
  background: rgba(9, 29, 55, 0.56);
  display: grid;
  gap: 0.42rem;
}

.slide--back .contact-block p {
  color: #dcecff;
}

@media (max-width: 1120px) {
  .adv-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  body {
    scroll-snap-type: y proximity;
  }

  .topbar__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    justify-content: flex-start;
  }

  main {
    padding-top: 122px;
  }

  .grid-2,
  .feature-grid,
  .industry-grid {
    grid-template-columns: 1fr;
  }

  .container {
    min-height: auto;
  }

  .slide {
    min-height: auto;
    padding: 0.8rem;
  }
}

@media (max-width: 560px) {
  .nav a {
    font-size: 0.72rem;
    padding: 0.18rem 0.5rem;
  }

  h1,
  h2 {
    font-size: clamp(1.45rem, 8vw, 2rem);
  }

  .btn {
    width: 100%;
  }
}