/* Global Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #e10067;
  --color-secondary: #f22e30;
  --color-bg: #05030a;
  --color-bg-soft: #0f0a18;
  --color-text-main: #ffffff;
  --color-text-muted: #b3b3c2;
  --color-card: #151125;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;
  --shadow-soft: 0 24px 80px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 18px 50px rgba(0, 0, 0, 0.45);
}

html,
body {
  height: 100%;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Display",
    "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(circle at top left, #2a1030 0, #05030a 55%);
  color: var(--color-text-main);
  -webkit-font-smoothing: antialiased;
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: linear-gradient(
      to bottom,
      rgba(5, 3, 10, 0.9),
      rgba(5, 3, 10, 0.7),
      transparent
    );
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

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

.logo-img {
  height: 32px;
  width: auto;
  display: block;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: conic-gradient(
    from 160deg,
    var(--color-primary),
    var(--color-secondary),
    #ff9a62,
    var(--color-primary)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.14);
}

.logo-text {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  color: var(--color-text-muted);
}

.nav a {
  position: relative;
  padding-bottom: 4px;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--color-secondary)
  );
  border-radius: 999px;
  transition: width 0.2s ease;
}

.nav a:hover {
  color: #fff;
}

.nav a:hover::after {
  width: 100%;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  outline: none;
  transition: transform 0.16s ease, box-shadow 0.16s ease, opacity 0.16s ease;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
  box-shadow: 0 16px 40px rgba(225, 0, 103, 0.45);
  color: #fff;
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #fff;
  background: rgba(5, 3, 10, 0.6);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55);
}

.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

/* Hero */
.hero {
  padding: 64px 0 40px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.badge {
  display: inline-flex;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(10, 8, 25, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--color-text-muted);
  font-size: 12px;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 40px;
  line-height: 1.16;
  letter-spacing: 0.01em;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-muted);
  max-width: 520px;
}

.hero-cta {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.secondary-text {
  font-size: 12px;
  color: var(--color-text-muted);
}

.hero-platforms {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.platform-tag {
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-muted);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  padding: 16px 0;
}

.phone-mock {
  position: relative;
  width: 230px;
  border-radius: 40px;
  padding: 10px;
  background: radial-gradient(
      circle at top,
      rgba(255, 255, 255, 0.15),
      transparent 55%
    ),
    linear-gradient(160deg, #181628, #05030a);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.main-phone {
  transform: rotate(-4deg) translateX(12px);
  z-index: 2;
}

.secondary-phone {
  position: absolute;
  right: 16px;
  bottom: -8px;
  width: 170px;
  transform: rotate(8deg);
  opacity: 0.95;
}

.phone-top-gradient {
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: conic-gradient(
    from 200deg,
    rgba(225, 0, 103, 0.65),
    rgba(242, 46, 48, 0.9),
    rgba(255, 180, 120, 0.75),
    rgba(225, 0, 103, 0.65)
  );
  filter: blur(20px);
  opacity: 0.5;
  z-index: -1;
}

.phone-screen {
  position: relative;
  background: linear-gradient(160deg, #171527, #090612);
  border-radius: 32px;
  padding: 18px 16px 16px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.phone-tag {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 10px;
  color: var(--color-text-muted);
}

.hot-tag {
  background: linear-gradient(
    135deg,
    rgba(225, 0, 103, 0.2),
    rgba(242, 46, 48, 0.45)
  );
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.phone-video-card {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 10px;
  border-radius: 18px;
  background: radial-gradient(circle at top left, #341537, #120b19);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
}

.video-avatar {
  width: 36px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(160deg, #ff9a62, #f22e30);
}

.video-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.video-title {
  font-size: 12px;
  font-weight: 500;
}

.video-meta {
  font-size: 11px;
  color: var(--color-text-muted);
}

.phone-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.chip {
  font-size: 10px;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.chip-primary {
  background: linear-gradient(
    135deg,
    rgba(225, 0, 103, 0.7),
    rgba(242, 46, 48, 0.85)
  );
  border: none;
}

.chip-outline {
  background: rgba(0, 0, 0, 0.35);
}

.progress-bar {
  width: 100%;
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  margin-top: 14px;
  overflow: hidden;
}

.progress-fill {
  width: 68%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--color-secondary)
  );
}

.processing-text {
  margin-top: 6px;
  font-size: 11px;
  color: var(--color-text-muted);
}

.karaoke-card {
  margin-top: 16px;
  padding: 12px;
  border-radius: 16px;
  background: radial-gradient(circle at top left, #3a163a, #12091b);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.65);
}

.karaoke-title {
  font-size: 12px;
  font-weight: 500;
}

.karaoke-lyric {
  margin-top: 8px;
  font-size: 11px;
  color: var(--color-text-muted);
}

.lyric-highlight {
  color: var(--color-secondary);
}

.karaoke-timeline {
  margin-top: 10px;
  width: 100%;
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  overflow: hidden;
}

.karaoke-progress {
  width: 42%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(
    90deg,
    var(--color-primary),
    var(--color-secondary)
  );
}

.karaoke-meta {
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--color-text-muted);
}

/* Sections */
.section {
  padding: 56px 0;
}

.section-light {
  background: radial-gradient(circle at top, #221631, #05030a);
}

.section-dark {
  background: radial-gradient(circle at top, #080514, #020008);
}

.section-download {
  background: linear-gradient(
      120deg,
      rgba(225, 0, 103, 0.16),
      transparent 55%
    ),
    radial-gradient(circle at bottom, #12081e, #05030a);
}

.section-header {
  max-width: 640px;
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 26px;
  margin-bottom: 10px;
}

.section-header p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.section-header-center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-header-center p {
  max-width: 640px;
  margin-inline: auto;
}

/* Features */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card {
  background: radial-gradient(circle at top, #26203a, #151125);
  border-radius: var(--radius-md);
  padding: 18px 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-card);
}

.feature-icon {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.feature-icon-1 {
  background: linear-gradient(135deg, var(--color-primary), #ff9a62);
}

.feature-icon-2 {
  background: linear-gradient(135deg, #ff9a62, var(--color-secondary));
}

.feature-icon-3 {
  background: linear-gradient(135deg, var(--color-secondary), #ff5bb0);
}

.feature-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

.feature-card ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--color-text-muted);
}

.feature-card li::before {
  content: "·";
  margin-right: 4px;
  color: var(--color-secondary);
}

/* Showcase */
.showcase-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 24px;
  align-items: flex-start;
}

.showcase-main {
  background: radial-gradient(circle at top left, #301635, #0b0715);
  border-radius: var(--radius-lg);
  padding: 18px 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-card);
  width: 30vw;
  max-width: 420px;
  min-width: 260px;
  justify-self: center;
}

.showcase-carousel {
  position: relative;
  border-radius: 24px;
  padding: 10px;
  background: radial-gradient(circle at top left, #40203f, #0c0715);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.6);
}

.showcase-carousel-stack {
  position: relative;
  aspect-ratio: 9 / 16;
  height: auto;
  overflow: hidden;
  border-radius: 20px;
}

.showcase-carousel-item {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 20px;
  opacity: 0;
  transform: scale(0.94) translateY(10px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.showcase-carousel-item.is-active {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.showcase-carousel-dots {
  margin-top: 12px;
  display: flex;
  justify-content: center;
  gap: 6px;
}

.showcase-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
}

.showcase-dot.is-active {
  width: 18px;
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-secondary)
  );
}

.showcase-side {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.showcase-card {
  display: flex;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 16px;
  background: rgba(5, 3, 10, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.showcase-thumb {
  flex-shrink: 0;
  width: 62px;
  height: 62px;
  border-radius: 14px;
}

.thumb-1 {
  background: linear-gradient(140deg, #ffb36b, #f22e30);
}

.thumb-2 {
  background: linear-gradient(140deg, #e10067, #7b4bff);
}

.thumb-3 {
  background: linear-gradient(140deg, #2ed3ff, #e10067);
}

.showcase-info h4 {
  font-size: 13px;
  margin-bottom: 4px;
}

.showcase-info p {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.showcase-note {
  margin-top: 4px;
  font-size: 11px;
  color: var(--color-text-muted);
}

/* Download */
.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 28px;
  align-items: center;
}

.download-content h2 {
  font-size: 24px;
  margin-bottom: 10px;
}

.download-content p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

.download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}

.download-status {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  font-size: 12px;
}

.download-status-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(225, 0, 103, 0.16);
  border: 1px solid rgba(225, 0, 103, 0.6);
  color: #fff;
  font-size: 11px;
  font-weight: 500;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.download-status-text {
  color: var(--color-text-muted);
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border-radius: 14px;
  padding: 10px 14px;
  background: rgba(5, 3, 10, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.16);
  cursor: default;
  position: relative;
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.store-btn.ios {
  background: radial-gradient(circle at top, #1e1c30, #080511);
}

.store-btn.android {
  background: radial-gradient(circle at top, #221631, #080511);
}

.store-btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    rgba(255, 255, 255, 0),
    rgba(255, 255, 255, 0.28),
    rgba(255, 255, 255, 0)
  );
  transform: translateX(-120%);
  opacity: 0;
}

.store-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.6);
  border-color: rgba(255, 255, 255, 0.4);
}

.store-btn:hover::before {
  opacity: 1;
  animation: store-shine 0.8s ease-out;
}

.store-icon {
  width: 28px;
  height: 28px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.12);
}

.store-logo-img {
  width: 28px;
  height: 28px;
  border-radius: 10px;
  object-fit: cover;
  flex-shrink: 0;
  transition: transform 0.18s ease;
}

.store-btn:hover .store-logo-img {
  transform: scale(1.08) rotate(-4deg);
}

@keyframes store-shine {
  0% {
    transform: translateX(-120%);
  }
  100% {
    transform: translateX(120%);
  }
}

.store-icon-ios {
  background: linear-gradient(140deg, #ffffff, #b3b3b3);
}

.store-icon-android {
  background: linear-gradient(140deg, #3ddc84, #00796b);
}

.store-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.store-label {
  font-size: 10px;
  color: var(--color-text-muted);
}

.store-name {
  font-size: 13px;
  font-weight: 500;
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 11px;
  color: var(--color-text-muted);
}

.qr-card {
  background: rgba(5, 3, 10, 0.9);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px dashed rgba(255, 255, 255, 0.3);
  text-align: center;
}

.qr-placeholder {
  width: 152px;
  height: 152px;
  border-radius: 18px;
  margin: 0 auto 10px;
  background: radial-gradient(circle at top, #241633, #05030a);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.qr-square {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  background: linear-gradient(140deg, var(--color-primary), var(--color-secondary));
}

.qr-square.small {
  width: 32px;
  height: 32px;
  opacity: 0.8;
}

.qr-square.tiny {
  width: 18px;
  height: 18px;
  opacity: 0.6;
}

.qr-card p {
  font-size: 12px;
  color: var(--color-text-muted);
}

.download-tips {
  margin-top: 10px;
  font-size: 12px;
  color: var(--color-text-muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Footer */
.footer {
  background: #05030a;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding: 28px 0 20px;
}

.footer-text {
  margin-top: 10px;
  font-size: 13px;
  color: var(--color-text-muted);
  max-width: 420px;
}

.footer-right {
  display: flex;
  gap: 40px;
}

.footer-col h5 {
  font-size: 13px;
  margin-bottom: 8px;
}

.footer-col a {
  display: block;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
  cursor: default;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 10px 0 16px;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 11px;
  color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 960px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-visual {
    margin-top: 8px;
  }

  .main-phone {
    transform: none;
  }

  .secondary-phone {
    display: none;
  }

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

  .showcase-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .download-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .download-visual {
    justify-self: flex-start;
  }
}

@media (max-width: 720px) {
  .header-inner {
    gap: 10px;
  }

  .nav {
    display: none;
  }

  .hero {
    padding-top: 40px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .section {
    padding: 40px 0;
  }

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

  .footer-inner {
    flex-direction: column;
    gap: 20px;
  }

  .footer-right {
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .store-btn {
    flex: 1;
  }

  .qr-placeholder {
    width: 132px;
    height: 132px;
  }
}