:root {
  --ink: #14213d;
  --muted: #60708d;
  --soft: #eef8ff;
  --line: rgba(90, 134, 184, 0.16);
  --blue: #2388ff;
  --cyan: #1cc7ef;
  --pink: #f142ca;
  --violet: #7c5cff;
  --panel: rgba(255, 255, 255, 0.76);
  --shadow: 0 28px 70px rgba(67, 126, 183, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(246, 252, 255, 0.96) 42%, #f7fbff 100%),
    radial-gradient(circle at 18% 12%, rgba(242, 76, 206, 0.14), transparent 30%),
    radial-gradient(circle at 78% 10%, rgba(26, 196, 239, 0.18), transparent 34%);
  font-family: "Noto Sans SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  letter-spacing: 0;
}

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

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

.page {
  min-height: 100vh;
  overflow: hidden;
}

.shell {
  width: min(1320px, calc(100% - 48px));
  margin: 0 auto;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  background: rgba(247, 252, 255, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(22px);
}

.nav {
  display: flex;
  height: 78px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 174px;
}

.brand-mark {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  box-shadow: 0 14px 30px rgba(74, 144, 226, 0.22);
}

.brand-word {
  width: 142px;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(18px, 4vw, 54px);
  color: #23324d;
  font-size: 0.94rem;
  font-weight: 700;
}

.nav-links a {
  opacity: 0.82;
  transition: color 0.18s ease, opacity 0.18s ease;
}

.nav-links a:hover {
  color: var(--blue);
  opacity: 1;
}

.nav-action,
.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid rgba(35, 136, 255, 0.22);
  border-radius: 16px;
  background: linear-gradient(135deg, #2388ff, #3d69ff);
  box-shadow: 0 18px 36px rgba(35, 136, 255, 0.22);
  color: white;
  font-weight: 800;
  padding: 0 24px;
  white-space: nowrap;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.78);
  box-shadow: inset 0 0 0 1px rgba(47, 91, 139, 0.13), 0 16px 36px rgba(35, 73, 118, 0.08);
  color: #22324f;
}

.hero {
  position: relative;
  display: grid;
  min-height: calc(100vh - 78px);
  grid-template-columns: minmax(0, 0.92fr) minmax(520px, 1.24fr);
  align-items: center;
  gap: 56px;
  padding: 152px 0 104px;
}

.hero::before {
  position: absolute;
  right: -18vw;
  bottom: 8%;
  left: -18vw;
  z-index: -1;
  height: 220px;
  border-radius: 50% 50% 0 0 / 38% 38% 0 0;
  background:
    repeating-linear-gradient(166deg, rgba(255, 255, 255, 0.54) 0 2px, transparent 2px 20px),
    linear-gradient(90deg, rgba(219, 190, 255, 0.56), rgba(255, 255, 255, 0.28) 48%, rgba(145, 225, 255, 0.56));
  content: "";
  transform: rotate(-1deg);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(124, 92, 255, 0.2);
  border-radius: 999px;
  background: rgba(128, 119, 255, 0.14);
  color: #6657ee;
  font-size: 0.9rem;
  font-weight: 800;
  padding: 9px 18px;
}

.hero h1 {
  max-width: 690px;
  margin: 28px 0 0;
  color: #14213d;
  font-size: clamp(3.4rem, 6.4vw, 7.1rem);
  font-weight: 900;
  line-height: 1.02;
}

.hero h1 span {
  background: linear-gradient(100deg, var(--pink), var(--violet) 46%, var(--cyan));
  background-clip: text;
  color: transparent;
}

.hero-copy {
  max-width: 610px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.04rem, 1.7vw, 1.28rem);
  font-weight: 600;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 34px;
}

.platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  color: #6b7890;
  font-size: 0.86rem;
  font-weight: 700;
}

.platforms span {
  border: 1px solid rgba(83, 122, 164, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  padding: 8px 12px;
}

.product-board {
  position: relative;
  min-height: 570px;
  perspective: 1200px;
}

.product-board::before {
  position: absolute;
  inset: 24px 18px 14px;
  border-radius: 38px;
  background: linear-gradient(135deg, rgba(243, 66, 202, 0.18), rgba(35, 136, 255, 0.16));
  content: "";
  filter: blur(34px);
  transform: rotate(-2deg);
}

.app-window {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(128, 170, 213, 0.28);
  border-radius: 28px;
  background: rgba(246, 252, 255, 0.9);
  box-shadow: var(--shadow);
  transform: rotateY(-7deg) rotateX(3deg) rotateZ(1.4deg);
  transform-origin: left center;
}

.window-bar {
  display: grid;
  height: 62px;
  grid-template-columns: 180px 1fr 150px;
  align-items: center;
  gap: 20px;
  border-bottom: 1px solid rgba(76, 124, 177, 0.14);
  padding: 0 24px;
}

.mini-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #38506f;
  font-size: 0.82rem;
  font-weight: 800;
}

.mini-brand img {
  width: 30px;
  height: 30px;
  border-radius: 9px;
}

.search {
  height: 36px;
  border: 1px solid rgba(100, 143, 185, 0.18);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
}

.window-dots {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #b8c8d9;
}

.app-grid {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr) 210px;
  gap: 18px;
  padding: 18px;
}

.sidebar,
.music-panel,
.inspector,
.player-bar {
  border: 1px solid rgba(82, 130, 182, 0.13);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.72);
}

.sidebar {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 18px 14px;
}

.side-line {
  height: 32px;
  border-radius: 12px;
  background: linear-gradient(90deg, rgba(35, 136, 255, 0.12), rgba(255, 255, 255, 0));
}

.side-line:nth-child(2),
.side-line:nth-child(5) {
  width: 78%;
}

.music-panel {
  padding: 18px;
}

.visual-banner {
  position: relative;
  min-height: 170px;
  overflow: hidden;
  border-radius: 20px;
  background:
    linear-gradient(115deg, rgba(243, 66, 202, 0.5), rgba(35, 136, 255, 0.28)),
    url("./assets/logo.png") right -86px center / 280px auto no-repeat,
    linear-gradient(135deg, #f5d5ff, #d9f7ff);
}
.visual-banner::after {
  position: absolute;
  inset: auto 22px 22px 22px;
  height: 34px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  content: "";
}

.card-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.album-card {
  aspect-ratio: 1.25;
  overflow: hidden;
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(35, 136, 255, 0.22), rgba(241, 66, 202, 0.24)),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.4) 0 2px, transparent 2px 15px);
}

.track-lines {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.track-lines span {
  height: 18px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(31, 138, 255, 0.14), rgba(51, 65, 85, 0.04));
}

.track-lines span:nth-child(2) {
  width: 82%;
}

.track-lines span:nth-child(3) {
  width: 68%;
}

.inspector {
  padding: 18px;
}

.cover {
  width: 82px;
  height: 82px;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(35, 136, 255, 0.18)),
    url("./assets/logo-s.png") center / cover no-repeat;
}

.wave {
  display: flex;
  height: 96px;
  align-items: end;
  gap: 5px;
  margin-top: 20px;
  border: 1px solid rgba(91, 137, 184, 0.14);
  border-radius: 18px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.64);
}

.wave i {
  flex: 1;
  height: var(--h);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(35, 136, 255, 0.34), rgba(35, 136, 255, 0.06));
}

.midi-box {
  margin-top: 16px;
  border: 2px solid rgba(35, 136, 255, 0.48);
  border-radius: 18px;
  padding: 14px;
}

.midi-box strong,
.midi-box span {
  display: block;
  height: 14px;
  border-radius: 999px;
  background: rgba(31, 83, 141, 0.12);
}

.midi-box strong {
  width: 78%;
  margin-bottom: 10px;
}

.midi-box span {
  width: 58%;
}

.player-bar {
  grid-column: 1 / -1;
  display: grid;
  min-height: 86px;
  grid-template-columns: 220px 1fr 160px;
  align-items: center;
  gap: 20px;
  padding: 16px 22px;
  background:
    repeating-linear-gradient(90deg, rgba(53, 69, 95, 0.06) 0 10px, transparent 10px 34px),
    rgba(255, 255, 255, 0.82);
}

.now-playing {
  display: flex;
  align-items: center;
  gap: 12px;
}

.now-playing img {
  width: 54px;
  height: 54px;
  border-radius: 14px;
}

.song-title,
.song-sub {
  display: block;
  height: 13px;
  border-radius: 999px;
  background: rgba(27, 48, 79, 0.16);
}

.song-title {
  width: 132px;
  margin-bottom: 9px;
}

.song-sub {
  width: 78px;
  opacity: 0.7;
}

.controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.control {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: rgba(34, 71, 116, 0.12);
}

.control.primary {
  width: 58px;
  height: 58px;
  background: linear-gradient(135deg, #1dc8ef, #4970ff);
  box-shadow: 0 16px 30px rgba(35, 136, 255, 0.26);
}

.progress {
  height: 8px;
  border-radius: 999px;
  background: rgba(129, 159, 192, 0.18);
}

.progress span {
  display: block;
  width: 68%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #19c8e9, #5272ff);
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
  margin-top: -64px;
  padding-bottom: 62px;
}

.feature-card,
.section-card,
.cta {
  border: 1px solid rgba(90, 134, 184, 0.14);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: 0 20px 50px rgba(52, 100, 147, 0.1);
  backdrop-filter: blur(18px);
}

.feature-card {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 16px;
  align-items: center;
  padding: 26px;
}

.feature-icon {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  border-radius: 17px;
  background: linear-gradient(135deg, var(--pink), var(--blue));
  color: white;
  font-size: 1.4rem;
  font-weight: 900;
}

.feature-card h3 {
  margin: 0 0 6px;
  font-size: 1.04rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.7;
}

.sections {
  display: grid;
  gap: 28px;
  padding: 34px 0 80px;
}

.section-card {
  display: grid;
  min-height: 420px;
  grid-template-columns: 0.72fr 1fr;
  gap: 34px;
  align-items: center;
  overflow: hidden;
  padding: 38px;
}

.section-card:nth-child(even) {
  grid-template-columns: 1fr 0.72fr;
}

.section-copy h2 {
  margin: 0;
  font-size: clamp(2rem, 3.5vw, 3.4rem);
  line-height: 1.06;
}

.section-copy p {
  max-width: 520px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.9;
}

.points {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.points span {
  position: relative;
  padding-left: 28px;
  color: #344763;
  font-weight: 800;
}

.points span::before {
  position: absolute;
  top: 0.55em;
  left: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pink), var(--cyan));
  content: "";
}

.screen {
  min-height: 292px;
  overflow: hidden;
  border: 1px solid rgba(74, 119, 168, 0.14);
  border-radius: 20px;
  background:
    linear-gradient(90deg, rgba(103, 147, 191, 0.1) 1px, transparent 1px),
    linear-gradient(rgba(103, 147, 191, 0.1) 1px, transparent 1px),
    rgba(255, 255, 255, 0.68);
  background-size: 42px 42px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.roll-screen {
  position: relative;
}

.roll-screen span {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--w);
  height: 18px;
  border-radius: 999px;
  background: rgba(28, 199, 239, 0.28);
}

.online-library-screen {
  display: grid;
  grid-template-rows: minmax(176px, 1fr) 76px;
  gap: 14px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.62);
}

.online-hero-art {
  position: relative;
  overflow: hidden;
  border-radius: 20px;
  background:
    radial-gradient(circle at 22% 18%, rgba(255, 255, 255, 0.86), transparent 28%),
    radial-gradient(circle at 82% 18%, rgba(35, 136, 255, 0.24), transparent 30%),
    linear-gradient(120deg, #ffe0fa 0%, #f7efff 44%, #d9f7ff 100%);
}

.online-hero-art::before {
  position: absolute;
  left: 24px;
  top: 36px;
  z-index: 3;
  width: 35%;
  height: 18px;
  border-radius: 999px;
  background: rgba(21, 30, 55, 0.18);
  box-shadow: 0 32px 0 rgba(21, 30, 55, 0.1), 0 72px 0 -3px rgba(35, 136, 255, 0.9);
  content: "";
}

.online-hero-art::after {
  position: absolute;
  left: 24px;
  bottom: 22px;
  z-index: 3;
  width: 76px;
  height: 34px;
  border-radius: 999px;
  background: linear-gradient(135deg, #2388ff, #6d5cff);
  box-shadow: 0 14px 24px rgba(35, 136, 255, 0.26);
  content: "";
}

.online-disc {
  position: absolute;
  right: 3%;
  top: 18%;
  z-index: 1;
  width: 29%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: repeating-radial-gradient(circle, #111827 0 4px, #253044 5px 7px), radial-gradient(circle, #f76ad8 0 16%, #7c5cff 17% 25%, transparent 26%);
}

.online-cover {
  position: absolute;
  top: 12%;
  z-index: 2;
  width: 28%;
  height: 76%;
  border: 2px solid rgba(255, 255, 255, 0.72);
  border-radius: 14px;
  box-shadow: 0 18px 30px rgba(64, 75, 110, 0.18);
}

.online-cover.one { right: 32%; transform: rotate(-8deg); background: radial-gradient(circle at 58% 28%, #fff2f9, transparent 21%), linear-gradient(135deg, #ffc4f0, #b8ddff); }
.online-cover.two { right: 19%; transform: rotate(-2deg); background: linear-gradient(155deg, #b7d2ff, #eff6ff 44%, #9b7a5a 45%, #8aa0c8 100%); }
.online-cover.three { right: 7%; transform: rotate(7deg); background: linear-gradient(160deg, #82d7ff 0 42%, #fff7d6 43% 52%, #75d9d8 53%); }

.online-cover-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.online-cover-row span {
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(35, 136, 255, 0.22), rgba(241, 66, 202, 0.24)), repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.4) 0 2px, transparent 2px 15px);
}

.practice-screen span,
.record-screen span {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--w);
  height: 22px;
  border-radius: 7px;
  background: var(--tone);
  box-shadow: 0 7px 18px rgba(31, 138, 255, 0.12);
}

.practice-screen,
.record-screen {
  position: relative;
}

.keyboard {
  display: grid;
  height: 92px;
  grid-template-columns: repeat(14, 1fr);
  gap: 2px;
  margin-top: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  padding: 8px;
}

.keyboard i {
  border-radius: 0 0 8px 8px;
  background: white;
  box-shadow: inset 0 -1px 0 rgba(54, 82, 116, 0.12);
}

.keyboard i:nth-child(3n) {
  height: 60%;
  background: #12182a;
}

.cta {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 32px;
  margin-bottom: 70px;
  padding: 46px 62px;
  background:
    linear-gradient(100deg, rgba(241, 66, 202, 0.9), rgba(124, 92, 255, 0.9) 46%, rgba(28, 199, 239, 0.9)),
    rgba(255, 255, 255, 0.72);
  color: white;
}

.cta h2 {
  margin: 0;
  font-size: clamp(2rem, 3.4vw, 3.8rem);
  line-height: 1.08;
}

.cta p {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 1rem;
  font-weight: 700;
}

.cta .button {
  background: white;
  color: #2778ef;
  box-shadow: 0 18px 36px rgba(17, 38, 89, 0.18);
}

.footer {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) repeat(3, minmax(140px, 0.4fr));
  gap: 28px;
  padding: 10px 0 52px;
  color: #6b7890;
  font-size: 0.9rem;
  font-weight: 650;
}

.footer-logo {
  width: 170px;
  margin-bottom: 14px;
}

.footer h3 {
  margin: 0 0 14px;
  color: #2b3b55;
  font-size: 0.98rem;
}

.footer a,
.footer span {
  display: block;
  margin-top: 10px;
}

@media (max-width: 1120px) {
  .hero,
  .section-card,
  .section-card:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .product-board {
    min-height: auto;
  }

  .app-window {
    transform: none;
  }

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

@media (max-width: 760px) {
  .shell {
    width: min(100% - 28px, 1320px);
  }

  .nav {
    height: auto;
    flex-wrap: wrap;
    padding: 14px 0;
  }

  .nav-links {
    width: 100%;
    order: 3;
    justify-content: space-between;
    gap: 10px;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .nav-action {
    min-height: 42px;
    padding: 0 16px;
  }

  .hero {
    min-height: auto;
    gap: 30px;
    padding: 130px 0 46px;
  }

  .hero h1 {
    font-size: clamp(3rem, 14vw, 4.2rem);
  }

  .app-grid,
  .window-bar,
  .player-bar {
    grid-template-columns: 1fr;
  }

  .sidebar,
  .inspector {
    display: none;
  }

  .feature-strip,
  .card-row,
  .cta,
  .footer {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .section-card,
  .cta {
    padding: 24px;
  }

  .section-card {
    min-height: auto;
  }
}

@media (max-width: 480px) {
  .brand-word {
    display: none;
  }

  .nav-links {
    font-size: 0.84rem;
  }

  .hero-actions .button {
    width: 100%;
  }

  .platforms span {
    font-size: 0.78rem;
  }
}