:root {
  --text: #f4f7ff;
  --muted: #d8defa;
  --primary: #7bb5ff;
  --primary-strong: #4f8cff;
  --accent: #c97dff;
  --shadow: 0 28px 70px rgba(44, 34, 120, 0.28);
  --radius-xl: 30px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 12%, rgba(191, 111, 255, 0.32), transparent 22%),
    radial-gradient(circle at 88% 18%, rgba(131, 170, 255, 0.24), transparent 24%),
    linear-gradient(135deg, #9d5cf3 0%, #6e63ea 38%, #4f82ea 72%, #4b7fe6 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: rgba(86, 91, 216, 0.26);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header__inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand__mark {
  width: 64px;
  height: 64px;
  flex: 0 0 64px;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand__mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  position: relative;
  z-index: 1;
}

.brand__text small {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 15px;
}

.nav a {
  color: rgba(237, 245, 255, 0.82);
}

.header-action,
.btn,
.platform-chip,
.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.header-action,
.btn--primary,
.cta-button {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #fff;
  box-shadow: 0 18px 34px rgba(25, 118, 255, 0.24);
}

.header-action,
.btn {
  min-height: 46px;
  padding: 0 18px;
}

.btn:hover,
.header-action:hover,
.cta-button:hover,
.platform-chip:hover {
  transform: translateY(-1px);
}

.btn--secondary,
.platform-chip {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text);
}

.hero {
  padding: 52px 0 18px;
}

.hero-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(420px, 0.96fr);
  gap: 28px;
  align-items: stretch;
}

.hero-main,
.product-panel,
.highlight-strip,
.feature-spotlight,
.feature-side-card,
.scenario-card,
.platform-card,
.steps-panel,
.faq-panel,
.cta-panel,
.footer-panel {
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow);
  background: linear-gradient(180deg, rgba(255,255,255,0.12), rgba(255,255,255,0.04));
  backdrop-filter: blur(14px);
}

.hero-main {
  padding: 42px;
  position: relative;
  overflow: hidden;
}

.hero-main::before,
.hero-main::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}

.hero-main::before {
  width: 220px;
  height: 220px;
  right: -70px;
  top: -90px;
}

.hero-main::after {
  width: 120px;
  height: 120px;
  left: -20px;
  bottom: -20px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(62, 166, 255, 0.12);
  border: 1px solid rgba(62, 166, 255, 0.2);
  color: #dceeff;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

h1 {
  margin: 20px 0 16px;
  font-size: clamp(40px, 5.8vw, 70px);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.hero-lead,
.section-head p,
.feature-copy p,
.card p,
.feature-side-card p,
.scenario-card p,
.platform-card p,
.step p,
.faq-item p,
.footer-brand p,
.footer-col a,
.footer-col span {
  color: var(--muted);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.btn--hero-primary {
  min-height: 60px;
  padding: 0 34px;
  font-size: 22px;
  letter-spacing: 0.01em;
  background: linear-gradient(135deg, #69d0ff 0%, #68a8ff 34%, #8d7dff 68%, #d47cff 100%);
  background-size: 220% 220%;
  box-shadow: 0 22px 44px rgba(72, 122, 255, 0.28);
}

.btn--hero-primary:hover {
  transform: translateY(-2px);
  background-position: 100% 50%;
  animation: heroGradientFlow 1.8s linear infinite;
  box-shadow: 0 26px 52px rgba(117, 99, 255, 0.34);
}

@keyframes heroGradientFlow {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
}

.hero-point {
  padding: 18px 20px;
  border-radius: 22px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
}

.hero-point strong,
.panel-label,
.card h3,
.feature-copy h2,
.feature-side-card h3,
.scenario-card h3,
.platform-card h3,
.step h3,
.faq-item h3,
.cta-panel h2,
.section-head h2 {
  display: block;
  margin: 0 0 8px;
}

.product-panel {
  padding: 26px;
  display: grid;
  grid-template-rows: auto auto auto 1fr;
  gap: 18px;
}

.panel-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-label,
.status,
.feature-badge,
.platform-meta,
.step__index,
.hero-chip {
  font-size: 13px;
  font-weight: 700;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(58, 202, 126, 0.12);
  border: 1px solid rgba(58, 202, 126, 0.2);
  color: #dff8ea;
}

.hero-visual-stage {
  min-height: 320px;
  border-radius: 28px;
  padding: 18px;
  background: linear-gradient(135deg, rgba(185,119,255,0.18), rgba(112,168,255,0.14));
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual-frame {
  width: 100%;
  max-width: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-side-meta {
  display: grid;
  gap: 12px;
}

.hero-side-meta__item {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
}

.highlight-strip {
  padding: 18px 22px;
}

.highlight-grid,
.scenario-grid,
.platform-grid,
.footer-grid {
  display: grid;
  gap: 18px;
}

.highlight-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.highlight-item {
  padding: 16px 18px;
  border-radius: 20px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
}

.highlight-item strong {
  display: block;
  margin-bottom: 6px;
}

.section {
  padding: 22px 0;
}

.section-head {
  margin-bottom: 18px;
}

.section-head h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.06;
  letter-spacing: -0.03em;
}

.feature-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 22px;
}

.feature-spotlight {
  padding: 34px;
}

.feature-spotlight__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 24px;
  align-items: center;
}

.feature-copy h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.feature-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.feature-badge {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
}

.feature-preview {
  min-height: 280px;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(185,119,255,0.18), rgba(112,168,255,0.14));
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.feature-preview-image {
  width: 100%;
  max-width: 420px;
}

.feature-side {
  display: grid;
  gap: 18px;
}

.feature-side-card,
.scenario-card,
.platform-card,
.step,
.faq-item,
.highlight-item {
  transition: background 0.22s ease, border-color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
}

.feature-side-card:hover,
.scenario-card:hover,
.platform-card:hover,
.step:hover,
.faq-item:hover,
.highlight-item:hover {
  background: linear-gradient(135deg, rgba(172,109,255,0.22), rgba(101,139,255,0.2));
  border-color: rgba(255,255,255,0.18);
  transform: translateY(-2px);
  box-shadow: 0 22px 48px rgba(70,61,181,0.18);
}

.feature-side-card {
  padding: 24px;
}

.icon {
  width: 62px;
  height: 62px;
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(125,195,255,0.2), rgba(208,134,255,0.18));
  color: #f7fbff;
  margin-bottom: 18px;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.18), 0 16px 34px rgba(77,65,191,0.2);
}

.icon svg {
  width: 26px;
  height: 26px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.scenario-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.scenario-card,
.platform-card,
.step,
.faq-item {
  padding: 22px;
}

.platform-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.platform-meta {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  margin-top: 14px;
}

.platform-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  margin-top: 16px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  font-weight: 700;
}

.steps-panel,
.faq-panel,
.cta-panel,
.footer-panel {
  padding: 30px;
}

.steps-panel__grid,
.faq-grid {
  display: grid;
  gap: 18px;
}

.steps-panel__grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.step__index {
  display: inline-flex;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(125,195,255,0.22), rgba(208,134,255,0.2));
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.18), 0 12px 26px rgba(77,65,191,0.18);
  font-weight: 800;
  color: #f7fbff;
}

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

.faq-item {
  position: relative;
  overflow: hidden;
}

.faq-item::before {
  content: "?";
  position: absolute;
  top: 18px;
  right: 18px;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(125,195,255,0.18), rgba(208,134,255,0.18));
  border: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.92);
  font-weight: 800;
  line-height: 34px;
  text-align: center;
}

.cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.cta-button {
  min-height: 48px;
  padding: 0 20px;
}

.footer-panel {
  position: relative;
  overflow: hidden;
}

.footer-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(255,255,255,0), rgba(255,255,255,0.32), rgba(255,255,255,0));
}

.footer-grid {
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  align-items: start;
  gap: 22px;
}

.footer-brand {
  padding-right: 12px;
}

.footer-brand p {
  max-width: 360px;
}

.footer-col {
  gap: 12px;
}

.footer-col strong,
.footer-col a,
.footer-brand .brand__text {
  transition: background 0.22s ease, color 0.22s ease, -webkit-text-fill-color 0.22s ease, opacity 0.22s ease;
}

.step:hover h3,
.faq-item:hover h3,
.footer-col a:hover,
.footer-brand:hover .brand__text {
  background: linear-gradient(135deg, #ffd6f3 0%, #d7b8ff 48%, #9bddff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.footer-col a:hover {
  opacity: 1;
}

.footer-brand:hover .brand__mark {
  transform: translateY(-1px);
}

.footer-col strong {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  margin-bottom: 12px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.footer-col a,
.footer-col span {
  display: block;
  padding-left: 2px;
}

.footer-bottom {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,0.08);
  color: rgba(237,245,255,0.72);
  font-size: 13px;
  letter-spacing: 0.01em;
}

@media (max-width: 1080px) {
  .hero-shell,
  .feature-layout,
  .feature-spotlight__grid,
  .scenario-grid,
  .platform-grid,
  .steps-panel__grid,
  .highlight-grid,
  .faq-grid,
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-points {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .site-header__inner {
    flex-wrap: wrap;
    padding: 14px 0;
  }

  .nav {
    width: 100%;
    flex-wrap: wrap;
    gap: 14px 18px;
  }

  .hero-shell,
  .feature-layout,
  .feature-spotlight__grid,
  .scenario-grid,
  .platform-grid,
  .steps-panel__grid,
  .highlight-grid,
  .faq-grid,
  .footer-grid,
  .hero-points,
  .hero-side-meta,
  .cta-panel {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .hero-main,
  .product-panel,
  .feature-spotlight,
  .steps-panel,
  .faq-panel,
  .cta-panel,
  .footer-panel {
    padding: 22px;
  }

  h1 {
    font-size: 38px;
  }
}