:root {
  --bg: #070809;
  --panel: #121416;
  --panel-soft: #191d20;
  --text: #f7f8fa;
  --muted: #a7adb5;
  --line: rgba(255, 255, 255, 0.12);
  --blue: #49a8ff;
  --green: #84d36b;
  --coral: #d96f59;
  --ink: #0d1114;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(7, 8, 9, 0.78);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.nav {
  max-width: var(--max);
  min-height: 68px;
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
  letter-spacing: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: inline-block;
  background: url("./assets/app-icon.jpeg") center / cover no-repeat;
  box-shadow: 0 12px 32px rgba(255, 67, 75, 0.28);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a {
  text-decoration: none;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--text);
  color: #070809;
  font-weight: 750;
  text-decoration: none;
  border: 1px solid transparent;
}

.button.secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

.hero {
  max-width: var(--max);
  min-height: calc(100vh - 68px);
  margin: 0 auto;
  padding: 76px 22px 44px;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 1.05fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.1;
  letter-spacing: 0;
}

h1 {
  margin-top: 14px;
  font-size: clamp(48px, 8vw, 104px);
  max-width: 720px;
}

.lead {
  margin: 24px 0 0;
  color: #d3d8dd;
  font-size: clamp(18px, 2.2vw, 23px);
  max-width: 620px;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.phone-stage {
  position: relative;
  min-height: 630px;
}

.phone {
  position: absolute;
  width: min(285px, 41vw);
  border-radius: 38px;
  overflow: hidden;
  background: #000;
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}

.phone img {
  display: block;
  width: 100%;
  height: auto;
}

.phone.main {
  right: 56px;
  top: 0;
  z-index: 2;
}

.phone.side {
  left: 10px;
  top: 124px;
  transform: rotate(-5deg);
  opacity: 0.82;
}

.section {
  padding: 86px 22px;
  border-top: 1px solid var(--line);
}

.section-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section h2 {
  font-size: clamp(32px, 4vw, 56px);
  max-width: 820px;
}

.section-intro {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
  max-width: 760px;
}

.feature-grid {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature {
  min-height: 180px;
  padding: 24px;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.feature b {
  display: block;
  margin-bottom: 10px;
  font-size: 20px;
}

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

.showcase {
  margin-top: 38px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.shot {
  overflow: hidden;
  border-radius: 18px;
  background: #000;
  border: 1px solid var(--line);
}

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

.band {
  background: #e8edf1;
  color: #121416;
}

.band .section-intro {
  color: #4d5862;
}

.steps {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.step {
  padding: 24px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid rgba(13, 17, 20, 0.1);
}

.step span {
  color: var(--blue);
  font-weight: 850;
}

.step p {
  color: #4d5862;
  margin: 10px 0 0;
}

.page {
  max-width: 880px;
  margin: 0 auto;
  padding: 76px 22px 92px;
}

.page h1 {
  font-size: clamp(42px, 7vw, 72px);
}

.page-meta {
  margin-top: 14px;
  color: var(--muted);
}

.content {
  margin-top: 42px;
}

.content section {
  padding: 30px 0;
  border-top: 1px solid var(--line);
}

.content h2 {
  font-size: 28px;
  margin-bottom: 14px;
}

.content h3 {
  font-size: 20px;
  margin: 22px 0 8px;
}

.content p,
.content li {
  color: #d1d6dc;
}

.content ul,
.content ol {
  padding-left: 22px;
}

.contact-box {
  margin-top: 24px;
  padding: 24px;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.contact-box p {
  margin: 8px 0 0;
}

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 30px 22px;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.footer a {
  color: var(--text);
  text-decoration: none;
}

@media (max-width: 860px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .nav-links {
    flex-wrap: wrap;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 44px;
    gap: 30px;
  }

  .phone-stage {
    min-height: 470px;
  }

  .phone {
    width: min(230px, 52vw);
  }

  .phone.main {
    right: 8%;
  }

  .phone.side {
    left: 4%;
    top: 88px;
  }

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

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

@media (max-width: 520px) {
  .nav-links {
    gap: 12px;
    font-size: 13px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .phone-stage {
    min-height: 390px;
  }

  .phone {
    border-radius: 28px;
  }

  .showcase {
    gap: 10px;
  }
}