:root {
  --bg-deep: #031b2d;
  --bg-ocean: #073e5f;
  --bg-surface: #0c6c8b;
  --accent: #5ee7d4;
  --accent-strong: #19c6d2;
  --text-main: #f4fbff;
  --text-soft: rgba(244, 251, 255, 0.74);
  --card: rgba(4, 29, 47, 0.56);
  --card-border: rgba(148, 224, 233, 0.18);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --max-width: 1180px;
  --font-ui: "Avenir Next", "PingFang SC", "Noto Sans SC", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--text-main);
  background:
    radial-gradient(circle at top left, rgba(94, 231, 212, 0.18), transparent 24%),
    radial-gradient(circle at 85% 15%, rgba(25, 198, 210, 0.2), transparent 20%),
    linear-gradient(180deg, #031321 0%, #04243b 34%, #073e5f 62%, #06263f 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: auto auto 0 -12vw;
  width: 48vw;
  height: 48vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(94, 231, 212, 0.1), transparent 68%);
  filter: blur(12px);
  pointer-events: none;
  z-index: 0;
}

body::after {
  inset: 8vh -10vw auto auto;
  width: 34vw;
  height: 34vw;
  background: radial-gradient(circle, rgba(143, 214, 255, 0.1), transparent 70%);
}

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

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

.page-shell {
  position: relative;
  z-index: 1;
}

.container {
  width: min(var(--max-width), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(2, 18, 31, 0.45);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-row {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-logo {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: 12px;
  display: block;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lang-toggle {
  display: inline-flex;
  padding: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.lang-toggle button {
  border: 0;
  background: transparent;
  color: var(--text-soft);
  padding: 9px 14px;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
  transition: 180ms ease;
}

.lang-toggle button.active {
  background: linear-gradient(135deg, rgba(94, 231, 212, 0.25), rgba(25, 198, 210, 0.38));
  color: var(--text-main);
}

.hero {
  padding: 64px 0 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 34px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(94, 231, 212, 0.12);
  border: 1px solid rgba(94, 231, 212, 0.16);
  color: var(--accent);
  font-size: 14px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 18px 0 16px;
  font-size: clamp(40px, 7vw, 74px);
  line-height: 0.94;
  letter-spacing: -0.04em;
}

.hero-copy p {
  margin: 0;
  max-width: 620px;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.7;
  color: var(--text-soft);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 168px;
  padding: 14px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
  font-weight: 600;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, #7ce6df 0%, #34c8d6 52%, #169ebf 100%);
  color: #06314a;
  box-shadow:
    0 16px 36px rgba(22, 158, 191, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.button-secondary {
  border-color: rgba(160, 228, 236, 0.24);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(113, 204, 220, 0.08));
  color: var(--text-main);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 32px;
}

.meta-card,
.feature-card,
.download-card,
.contact-card,
.phone-shell {
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.meta-card {
  padding: 18px 18px 16px;
  border-radius: var(--radius-md);
}

.meta-card strong {
  display: block;
  font-size: 24px;
  letter-spacing: -0.04em;
}

.meta-card span {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--text-soft);
}

.hero-visual {
  position: relative;
  min-height: 580px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual::before,
.hero-visual::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
}

.hero-visual::before {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(94, 231, 212, 0.24), transparent 66%);
  top: 60px;
  right: 30px;
}

.hero-visual::after {
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(143, 214, 255, 0.18), transparent 65%);
  bottom: 40px;
  left: 30px;
}

.phone-shell {
  width: min(360px, 100%);
  padding: 18px;
  border-radius: 36px;
  position: relative;
  overflow: hidden;
}

.phone-shell::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 10px;
  transform: translateX(-50%);
  width: 120px;
  height: 26px;
  background: rgba(4, 13, 24, 0.86);
  border-radius: 18px;
  z-index: 2;
}

.phone-screen {
  aspect-ratio: 9 / 18.5;
  border-radius: 28px;
  overflow: hidden;
  position: relative;
  background:
    radial-gradient(circle at 15% 14%, rgba(255, 255, 255, 0.25), transparent 24%),
    linear-gradient(180deg, rgba(0, 28, 48, 0.4), rgba(0, 69, 91, 0.72)),
    linear-gradient(180deg, #4fd0d6 0%, #0b6782 45%, #063552 100%);
}

.screen-top {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.22), transparent 18%),
    radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.28), transparent 30%);
}

.screen-content {
  position: absolute;
  inset: 0;
  padding: 60px 24px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.screen-badge {
  align-self: flex-start;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.22);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.screen-wave {
  position: absolute;
  left: -15%;
  right: -15%;
  bottom: -4%;
  height: 55%;
  background:
    radial-gradient(circle at 20% 15%, rgba(255, 255, 255, 0.16), transparent 16%),
    linear-gradient(180deg, rgba(6, 123, 150, 0.2), rgba(0, 22, 38, 0.7));
  clip-path: polygon(0 28%, 10% 24%, 20% 30%, 30% 20%, 40% 26%, 50% 18%, 60% 24%, 70% 16%, 80% 24%, 90% 20%, 100% 28%, 100% 100%, 0 100%);
}

.screen-card {
  width: 100%;
  padding: 18px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(10px);
}

.screen-card strong {
  display: block;
  font-size: 20px;
  margin-bottom: 8px;
}

.screen-card p {
  margin: 0;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
}

.bubbles span {
  position: absolute;
  display: block;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.18));
  animation: bubbleFloat 7s ease-in-out infinite;
  opacity: 0.7;
}

.bubbles span:nth-child(1) {
  width: 16px;
  height: 16px;
  left: 18%;
  bottom: 16%;
}

.bubbles span:nth-child(2) {
  width: 10px;
  height: 10px;
  left: 74%;
  bottom: 28%;
  animation-delay: 1.4s;
}

.bubbles span:nth-child(3) {
  width: 22px;
  height: 22px;
  left: 65%;
  bottom: 12%;
  animation-delay: 2.2s;
}

.bubbles span:nth-child(4) {
  width: 12px;
  height: 12px;
  left: 28%;
  bottom: 36%;
  animation-delay: 0.8s;
}

@keyframes bubbleFloat {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-14px);
  }
}

.section {
  padding: 38px 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

.section-heading h2 {
  margin: 0 0 12px;
  font-size: clamp(30px, 4.2vw, 46px);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 0;
  line-height: 1.7;
  color: var(--text-soft);
  font-size: 17px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: auto -10% -35% auto;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(94, 231, 212, 0.16), transparent 68%);
}

.feature-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 18px;
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.feature-card p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.download-card {
  border-radius: var(--radius-xl);
  padding: 26px;
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 20px;
  align-items: center;
}

.platform-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent);
  width: fit-content;
  margin-bottom: 18px;
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.download-card h3 {
  margin: 0 0 10px;
  font-size: 28px;
}

.download-card p {
  margin: 0 0 20px;
  color: var(--text-soft);
  line-height: 1.7;
}

.download-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.download-link {
  padding: 12px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-weight: 600;
}

.qr-panel {
  padding: 14px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.qr-panel img {
  width: 100%;
  border-radius: 12px;
  background: #fff;
}

.qr-caption {
  margin-top: 10px;
  text-align: center;
  font-size: 13px;
  color: var(--text-soft);
}

.contact-card {
  border-radius: var(--radius-xl);
  padding: 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 18px;
}

.contact-card h3 {
  margin: 0 0 8px;
  font-size: 30px;
}

.contact-card p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(94, 231, 212, 0.2), rgba(25, 198, 210, 0.28));
  border: 1px solid rgba(94, 231, 212, 0.28);
  font-weight: 700;
}

.privacy-main {
  padding-top: 22px;
}

.privacy-hero-card,
.policy-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.privacy-hero-card {
  padding: 36px;
  border-radius: var(--radius-xl);
}

.privacy-hero-card h1 {
  margin: 18px 0 12px;
  font-size: clamp(34px, 5.5vw, 56px);
  line-height: 1;
  letter-spacing: -0.04em;
}

.privacy-summary {
  margin: 0;
  max-width: 760px;
  color: var(--text-soft);
  line-height: 1.8;
  font-size: 17px;
}

.policy-card {
  padding: 30px;
  border-radius: var(--radius-xl);
}

.policy-content {
  display: grid;
  gap: 14px;
}

.policy-content p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.85;
  font-size: 15px;
}

.policy-content .is-heading {
  margin-top: 10px;
  color: var(--text-main);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-footer {
  padding: 24px 0 46px;
  color: rgba(244, 251, 255, 0.58);
  font-size: 14px;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-links {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.footer-link {
  color: var(--text-main);
  border-bottom: 1px solid rgba(244, 251, 255, 0.3);
  transition: border-color 180ms ease, color 180ms ease;
}

.footer-link:hover {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.72);
}

[data-i18n] {
  transition: opacity 140ms ease;
}

@media (max-width: 1024px) {
  .hero-grid,
  .download-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 42px;
  }

  .hero-visual {
    min-height: auto;
  }

  .download-card {
    grid-template-columns: 1fr;
  }

  .contact-card,
  .footer-row {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 28px, var(--max-width));
  }

  .header-row {
    min-height: 74px;
  }

  .hero-copy h1 {
    max-width: 10ch;
  }

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

  .phone-shell {
    padding: 14px;
    border-radius: 28px;
  }

  .feature-card,
      .download-card,
      .contact-card {
        padding: 22px;
      }

      .privacy-hero-card,
      .policy-card {
        padding: 22px;
      }

      .download-card {
        gap: 16px;
      }

  .download-links,
  .cta-row {
    width: 100%;
  }

  .button,
  .download-link,
  .contact-email {
    width: 100%;
  }

      .header-actions {
        gap: 10px;
      }

      .brand span:last-child {
        display: none;
      }

      .footer-links {
        justify-content: flex-start;
      }
    }