:root {
  color-scheme: light;
  --ink: oklch(15% 0.006 255);
  --ink-soft: oklch(31% 0.006 255);
  --muted: oklch(48% 0.005 255);
  --line: oklch(88% 0.004 255);
  --paper: oklch(98% 0.004 255);
  --panel: oklch(94% 0.004 255);
  --panel-strong: oklch(89% 0.005 255);
  --accent: oklch(20% 0.01 255);
  --accent-soft: oklch(92% 0.006 255);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow: 0 24px 70px oklch(15% 0.006 255 / 12%);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.7;
}

body.modal-open {
  overflow: hidden;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: oklch(98% 0.004 255 / 88%);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.nav {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: var(--paper);
  box-shadow: 7px 7px 0 var(--panel-strong);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 9px 13px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 15px;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  background: var(--ink);
  color: var(--paper);
}

.mobile-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 12px;
  padding: 8px 12px;
  font: inherit;
}

.section {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 86px 0;
}

.section.tight {
  padding-top: 46px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--ink);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: -0.055em;
}

h1 {
  max-width: 960px;
  font-size: clamp(38px, 6.4vw, 72px);
}

h2 {
  max-width: 780px;
  font-size: clamp(30px, 4.2vw, 54px);
}

h3 {
  font-size: clamp(21px, 2vw, 28px);
}

p {
  margin: 0;
  color: var(--ink-soft);
}

.lead {
  max-width: 680px;
  margin-top: 24px;
  font-size: clamp(17px, 1.8vw, 21px);
  color: var(--ink-soft);
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -8% -20% auto;
  width: 48vw;
  height: 48vw;
  border-radius: 50%;
  background: repeating-radial-gradient(circle, oklch(24% 0.008 255 / 9%) 0 1px, transparent 1px 13px);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 42px;
  align-items: center;
  min-height: 680px;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 13px 22px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  font-weight: 800;
  font-size: 15px;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px oklch(15% 0.006 255 / 12%);
}

.button.primary {
  background: var(--ink);
  color: var(--paper);
}

.button.secondary {
  background: transparent;
  color: var(--ink);
}

.button.light {
  border-color: var(--paper);
  background: var(--paper);
  color: var(--ink);
}

.player-card {
  position: relative;
  z-index: 1;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 26px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.player-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.window-dots {
  display: flex;
  gap: 7px;
}

.window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--panel-strong);
}

.spectrum {
  height: 210px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 8px;
  padding: 28px 0;
}

.spectrum span {
  width: 100%;
  min-width: 8px;
  border-radius: 999px 999px 4px 4px;
  background: var(--ink);
  opacity: 0.86;
}

.track {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 16px;
  align-items: center;
  padding: 18px;
  border-radius: 22px;
  background: var(--panel);
}

.cover {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background:
    linear-gradient(135deg, transparent 46%, var(--paper) 47% 53%, transparent 54%),
    var(--ink);
}

.progress {
  margin-top: 12px;
  height: 8px;
  border-radius: 999px;
  background: var(--panel-strong);
  overflow: hidden;
}

.progress span {
  display: block;
  height: 100%;
  width: 64%;
  border-radius: inherit;
  background: var(--ink);
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: end;
  margin-bottom: 38px;
}

.section-head p {
  max-width: 470px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.feature-item {
  min-height: 230px;
  padding: 28px;
  background: var(--paper);
}

.feature-item strong,
.mini strong {
  display: block;
  margin-bottom: 12px;
  font-size: 18px;
}

.number {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  margin-bottom: 36px;
  background: var(--ink);
  color: var(--paper);
  font-weight: 900;
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 40px;
  align-items: start;
}

.scene-board {
  display: grid;
  gap: 14px;
}

.scene {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 20px;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper);
}

.scene-badge {
  width: 86px;
  height: 86px;
  border-radius: 24px;
  background: var(--ink);
  color: var(--paper);
  display: grid;
  place-items: center;
  font-size: 30px;
}

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

blockquote {
  margin: 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper);
}

.review-card {
  display: flex;
  min-height: 264px;
  flex-direction: column;
  justify-content: space-between;
  gap: 22px;
}

.review-meta {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 13px;
  align-items: center;
}

.review-meta strong {
  display: block;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.3;
}

.review-meta small {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: var(--paper);
  font-weight: 900;
}

blockquote p {
  color: var(--ink);
  font-size: 17px;
}

blockquote footer {
  margin-top: 22px;
  color: var(--muted);
  font-size: 14px;
}

.review-card footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 0;
}

.review-card footer b {
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--panel);
  color: var(--ink-soft);
  font-size: 12px;
}

.download-hero {
  background: var(--ink);
  color: var(--paper);
}

.download-hero p,
.download-hero .eyebrow {
  color: oklch(86% 0.005 255);
}

.download-hero .eyebrow::before {
  background: var(--paper);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.download-card,
.support-card,
.timeline-item {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper);
}

.download-card .platform {
  display: inline-grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 16px;
  margin-bottom: 20px;
  background: var(--ink);
  color: var(--paper);
  font-weight: 900;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 22px;
}

.meta span {
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
}

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

.mini {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--paper);
}

.timeline {
  display: grid;
  gap: 14px;
}

.source-list {
  display: grid;
  gap: 12px;
}

.source-list a {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--paper);
  color: var(--ink-soft);
}

.cta {
  width: min(var(--max), calc(100% - 40px));
  margin: 50px auto 90px;
  padding: clamp(32px, 6vw, 64px);
  border-radius: var(--radius-xl);
  background: var(--ink);
  color: var(--paper);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
}

.cta p {
  max-width: 620px;
  margin-top: 16px;
  color: oklch(84% 0.005 255);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.footer-grid {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 42px 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--ink-soft);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
  place-items: center;
  padding: 24px;
}

.modal.active {
  display: grid;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: oklch(15% 0.006 255 / 62%);
}

.modal-panel {
  position: relative;
  width: min(920px, 100%);
  max-height: min(760px, calc(100vh - 48px));
  overflow: auto;
  border-radius: 28px;
  background: var(--paper);
  box-shadow: 0 40px 100px oklch(15% 0.006 255 / 32%);
}

.modal-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
  padding: 28px 28px 18px;
  border-bottom: 1px solid var(--line);
}

.modal-close {
  border: 1px solid var(--line);
  background: var(--paper);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 22px;
}

.modal-body {
  padding: 28px;
  display: grid;
  grid-template-columns: 1.1fr;
  gap: 24px;
}

.modal-options {
  display: grid;
  gap: 12px;
}

.download-option {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: center;
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.qr {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 14px;
  text-align: center;
  background: var(--paper);
}

.qr img {
  border-radius: 10px;
  background: var(--paper);
  margin: 0 auto;
}

.version-history {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.version-card,
.version-note {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
}

.version-card {
  display: flex;
  min-height: 248px;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  padding: 22px;
}

.version-top {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 13px;
}

.version-top span {
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-weight: 800;
}

.version-card h3 {
  margin: auto 0 0;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1;
}

.version-card p,
.version-note p {
  margin: 0;
  color: var(--ink-soft);
}

.version-note {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(160px, 0.35fr) 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 20px 22px;
}

.version-note strong {
  font-size: 18px;
}

.version-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.version-links a {
  justify-self: end;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-weight: 800;
  font-size: 13px;
  line-height: 1.2;
}

.version-links a:hover {
  background: var(--ink);
  color: var(--paper);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 12px;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 14px;
  border-radius: 10px;
}

.skip-link:focus {
  left: 12px;
}

@media (max-width: 940px) {
  .mobile-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    inset: 74px 20px auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: var(--paper);
    box-shadow: var(--shadow);
  }

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

  .hero-grid,
  .split,
  .cta,
  .modal-body,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-list,
  .quote-wall,
  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .version-note {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .section,
  .nav,
  .cta,
  .footer-grid {
    width: min(100% - 24px, var(--max));
  }

  .section {
    padding: 58px 0;
  }

  .hero-grid {
    min-height: auto;
    padding: 48px 0 68px;
  }

  .feature-list,
  .quote-wall,
  .download-grid,
  .mini-grid,
  .qr-grid,
  .version-history {
    grid-template-columns: 1fr;
  }

  .scene {
    grid-template-columns: 1fr;
  }

  .cta {
    margin-bottom: 56px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}