:root {
  --brand: #00a6c6;
  --brand-dark: #0089a5;
  --brand-soft: rgba(0, 166, 198, 0.1);
  --gold: #f0c14a;
  --ink: #0f1c2e;
  --ink-2: #3d4f66;
  --muted: #7a8ba3;
  --line: #e6eef5;
  --bg: #f4f8fb;
  --white: #ffffff;
  --radius: 20px;
  --shadow: 0 18px 50px rgba(15, 28, 46, 0.08);
  --max: 1120px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Outfit", "Noto Sans SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(230, 238, 245, 0.8);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0;
}

.brand-logo {
  height: 42px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  object-position: left center;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--ink-2);
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--brand);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff !important;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--brand-dark);
}

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 88px;
  background:
    radial-gradient(ellipse 80% 60% at 85% 10%, rgba(0, 166, 198, 0.18), transparent 55%),
    radial-gradient(ellipse 50% 45% at 5% 90%, rgba(46, 196, 224, 0.12), transparent 50%),
    linear-gradient(180deg, #eef8fb 0%, #ffffff 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-family: var(--display);
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  line-height: 1.15;
  margin: 0 0 18px;
  letter-spacing: -0.02em;
}

.hero h1 em {
  font-style: normal;
  color: var(--brand);
}

.hero-lead {
  font-size: 1.12rem;
  color: var(--ink-2);
  max-width: 34em;
  margin: 0 0 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.98rem;
  border: 1.5px solid transparent;
  transition: 0.2s ease;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 28px rgba(0, 166, 198, 0.28);
}

.btn-primary:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
}

.btn-ghost {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 28px;
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-meta strong {
  color: var(--ink);
  font-weight: 700;
}

.phone-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 460px;
}

.phone {
  width: min(100%, 280px);
  aspect-ratio: 9 / 19.2;
  border-radius: 36px;
  background: linear-gradient(160deg, #123047, #0a1a28);
  padding: 12px;
  box-shadow: var(--shadow), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
  position: relative;
  z-index: 2;
}

.phone-screen {
  height: 100%;
  border-radius: 28px;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(0, 166, 198, 0.35), transparent 40%),
    linear-gradient(180deg, #102536, #16384d);
  color: #fff;
  padding: 28px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.phone-notch {
  width: 88px;
  height: 18px;
  border-radius: 999px;
  background: #0a1520;
  margin: 0 auto 8px;
}

.phone-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  padding: 14px;
  backdrop-filter: blur(8px);
}

.phone-card .price {
  color: #7de7f7;
  font-size: 1.35rem;
  font-weight: 700;
  font-family: var(--display);
}

.phone-card .tag {
  display: inline-block;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 6px;
  background: rgba(255, 90, 90, 0.25);
  color: #ffc9c9;
  margin-bottom: 8px;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  z-index: 1;
}

.blob-1 {
  width: 220px;
  height: 220px;
  background: rgba(0, 166, 198, 0.35);
  top: 10%;
  right: 8%;
}

.blob-2 {
  width: 160px;
  height: 160px;
  background: rgba(46, 196, 224, 0.25);
  bottom: 8%;
  left: 12%;
}

/* Sections */
.section {
  padding: 88px 0;
}

.section-muted {
  background: var(--bg);
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-head h2 {
  font-family: var(--display);
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: var(--ink-2);
  font-size: 1.05rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(0, 166, 198, 0.35);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--brand-soft);
  color: var(--brand);
  margin-bottom: 16px;
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--display);
}

.feature-card h3 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.feature-card p {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.96rem;
}

.scenes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.scene {
  border-radius: 16px;
  padding: 22px 18px;
  background: #fff;
  border: 1px solid var(--line);
  text-align: center;
}

.scene strong {
  display: block;
  margin-bottom: 4px;
}

.scene span {
  color: var(--muted);
  font-size: 0.88rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 28px 24px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--brand);
  display: block;
  margin-bottom: 12px;
  line-height: 1;
}

.step h3 {
  margin: 0 0 8px;
}

.step p {
  margin: 0;
  color: var(--ink-2);
}

/* Download / QR */
.download-panel {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 40px;
  align-items: center;
  max-width: 820px;
  margin: 0 auto;
  padding: 36px;
  border-radius: 28px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.qr-card {
  text-align: center;
}

.qr-img {
  width: min(280px, 70vw);
  height: auto;
  margin: 0 auto 14px;
  border-radius: 20px;
  background: #fff;
}

.qr-tip {
  margin: 0;
  color: var(--brand-dark);
  font-weight: 600;
  font-size: 0.98rem;
}

.download-side {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.channel {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--bg);
}

.channel strong {
  font-size: 1.05rem;
}

.channel span {
  color: var(--muted);
  font-size: 0.92rem;
}

.channel-on {
  border-color: rgba(0, 166, 198, 0.35);
  background: var(--brand-soft);
}

.channel-on strong {
  color: var(--brand-dark);
}

.channel-soon {
  opacity: 0.85;
}

.download-note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .download-panel {
    grid-template-columns: 1fr;
    padding: 28px 20px;
    text-align: center;
  }

  .download-side {
    text-align: left;
  }
}

/* Footer / legal pages */
.footer {
  background: #0f1c2e;
  color: rgba(255, 255, 255, 0.78);
  padding: 48px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}

.footer h4 {
  color: #fff;
  margin: 0 0 14px;
  font-size: 0.95rem;
}

.footer a {
  display: block;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.72);
}

.footer a:hover {
  color: #7de7f7;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.footer-brand img {
  height: 56px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
  background: transparent;
  border-radius: 0;
  /* 页脚深色底上保证 Logo 识别度 */
  filter: drop-shadow(0 0 0.5px rgba(255, 255, 255, 0.35));
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  font-size: 0.88rem;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
}

/* Legal */
.legal-hero {
  padding: 56px 0 32px;
  background: linear-gradient(180deg, #eef8fb, #fff);
}

.legal-hero h1 {
  font-family: var(--display);
  margin: 0 0 8px;
  font-size: 2rem;
}

.legal-hero p {
  margin: 0;
  color: var(--muted);
}

.legal-body {
  padding: 24px 0 72px;
  max-width: 760px;
}

.legal-body h2 {
  font-size: 1.25rem;
  margin: 28px 0 10px;
}

.legal-body p,
.legal-body li {
  color: var(--ink-2);
}

.legal-body ul {
  padding-left: 1.2em;
}

@media (max-width: 900px) {
  .hero-grid,
  .feature-grid,
  .steps,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 36px 24px;
  }

  .phone-stage {
    min-height: 380px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 20px;
    gap: 0;
  }

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

  .nav-links a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin-top: 12px;
    justify-content: center;
  }

  .nav-toggle {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .feature-card,
  .btn-primary {
    transition: none;
  }
}