:root {
  --bg: #f6fbff;
  --bg-soft: #ecf5ff;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #ffffff;
  --text: #1b3656;
  --muted: #617f9f;
  --line: rgba(104, 146, 189, 0.2);
  --accent: #47c8a6;
  --accent-strong: #2cb395;
  --accent-dark: #ffffff;
  --secondary: #5e95d9;
  --shadow: 0 16px 36px rgba(78, 126, 172, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  background:
    radial-gradient(circle at 10% -5%, rgba(123, 187, 247, 0.35) 0%, transparent 36%),
    radial-gradient(circle at 90% 0%, rgba(142, 232, 201, 0.35) 0%, transparent 34%),
    linear-gradient(170deg, #f9fdff 0%, #f3faff 46%, #f8fffc 100%);
  line-height: 1.65;
  overflow-x: hidden;
}

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

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

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.page-glow {
  position: fixed;
  z-index: -1;
  border-radius: 999px;
  pointer-events: none;
  filter: blur(70px);
  opacity: 0.4;
}

.glow-a {
  width: 320px;
  height: 320px;
  top: 8vh;
  left: -100px;
  background: #8ec6ff;
}

.glow-b {
  width: 420px;
  height: 420px;
  right: -140px;
  bottom: 8vh;
  background: #8de9cb;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px) saturate(140%);
  transition: background 0.25s ease, border-color 0.25s ease;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.96);
  border-color: var(--line);
}

.nav-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, #66dfbf, #a9f3dd);
  box-shadow: 0 0 18px rgba(120, 227, 194, 0.58);
}

.brand-text {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lang-toggle {
  border: 1px solid var(--line);
  background: rgba(133, 178, 235, 0.12);
  color: var(--text);
  border-radius: 999px;
  padding: 6px 12px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  cursor: pointer;
}

.menu-toggle {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: transparent;
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 0 8px;
  cursor: pointer;
}

.menu-toggle span {
  height: 2px;
  width: 100%;
  background: #4f7094;
  border-radius: 4px;
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 10px;
  transition: color 0.22s ease, background 0.22s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #234f7f;
  background: rgba(148, 196, 243, 0.22);
}

.nav-cta {
  background: linear-gradient(135deg, #6ec9ff, #4fb6f3);
  color: #ffffff !important;
  font-weight: 700 !important;
}

.hero {
  padding: 126px 0 64px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.14em;
  color: var(--secondary);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.82rem;
}

.hero h1 {
  margin: 12px 0 14px;
  font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
  font-size: clamp(2.1rem, 5vw, 4rem);
  line-height: 1.15;
  max-width: 12.5ch;
}

.hero-desc {
  margin: 0;
  color: var(--muted);
  max-width: 58ch;
}

.hero-buttons {
  display: flex;
  gap: 12px;
  margin-top: 26px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 11px 20px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 16px rgba(101, 149, 193, 0.24);
}

.btn-primary {
  background: linear-gradient(135deg, #59c7f2, #4ea9ee);
  color: #ffffff;
}

.btn-secondary {
  border: 1px solid var(--line);
  background: rgba(148, 196, 243, 0.22);
  color: var(--text);
}

.hero-panel {
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.94), rgba(225, 241, 255, 0.9));
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 18px;
  box-shadow: var(--shadow);
}

.panel-frame {
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid rgba(145, 186, 225, 0.35);
}

.panel-frame img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.panel-metrics {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.metric-card {
  background: rgba(245, 251, 255, 0.95);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
}

.metric-card strong {
  display: block;
  font-size: 0.96rem;
  margin-bottom: 5px;
}

.metric-card span {
  display: block;
  color: var(--muted);
  font-size: 0.83rem;
}

.section {
  padding: 26px 0 30px;
}

.section-title {
  margin: 0;
  font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
  font-size: clamp(1.6rem, 3.8vw, 2.4rem);
}

.section-subtitle {
  margin: 10px 0 0;
  color: var(--muted);
}

.feature-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.feature-card {
  background: linear-gradient(160deg, #ffffff, #f3f9ff);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.workflow-steps {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.step {
  background: linear-gradient(165deg, #ffffff, #f4faff);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}

.step-index {
  display: inline-block;
  margin-bottom: 10px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--secondary);
}

.step h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.screen-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.screen-item {
  margin: 0;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: #ffffff;
  transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.screen-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(101, 149, 193, 0.22);
}

.screen-item img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.screen-item figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 20px 12px 10px;
  font-size: 0.86rem;
  color: #1e476f;
  background: linear-gradient(to top, rgba(241, 249, 255, 0.95), rgba(241, 249, 255, 0.2));
}

.screen-item:first-child {
  grid-column: span 2;
}

.video-shell {
  margin-top: 20px;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #f7fcff;
}

.video-shell video {
  display: block;
  width: 100%;
}

.download-wrap {
  text-align: center;
  padding: 34px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(233, 246, 255, 0.95), rgba(234, 255, 247, 0.95));
  box-shadow: var(--shadow);
}

.download-wrap h2 {
  margin: 0;
  font-size: clamp(1.6rem, 4vw, 2.35rem);
}

.download-wrap p {
  max-width: 62ch;
  margin: 12px auto 22px;
  color: var(--muted);
}

.footer {
  padding: 14px 0 36px;
  color: var(--muted);
  text-align: center;
  font-size: 0.88rem;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(242, 249, 255, 0.88);
  backdrop-filter: blur(5px);
}

.lightbox.active {
  display: flex;
}

.lightbox-content img {
  max-width: 90vw;
  max-height: 84vh;
  object-fit: contain;
  border-radius: 12px;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  border: none;
  color: #2b547f;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 8px 18px rgba(111, 155, 196, 0.28);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  cursor: pointer;
}

.lightbox-close {
  top: 16px;
  right: 16px;
  font-size: 1.9rem;
  line-height: 1;
}

.lightbox-prev {
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next {
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1040px) {
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .hero h1 {
    max-width: none;
  }

  .panel-metrics {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .nav-inner {
    height: 66px;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    padding: 12px 4vw 18px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 11px 12px;
  }

  .nav-cta {
    text-align: center;
  }

  .hero {
    padding-top: 108px;
  }

  .workflow-steps,
  .screen-grid {
    grid-template-columns: 1fr;
  }

  .screen-item:first-child {
    grid-column: span 1;
  }

  .download-wrap {
    padding: 26px 18px;
  }
}

@media (max-width: 540px) {
  .btn {
    width: 100%;
  }

  .hero-buttons {
    gap: 10px;
  }

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