:root {
  color-scheme: light;
  --bg: #f4fbf2;
  --bg-strong: #e4f5df;
  --panel: #ffffff;
  --panel-soft: #f9fdf7;
  --ink: #17301f;
  --muted: #5f7467;
  --green: #62b95f;
  --green-deep: #24783c;
  --green-soft: #d9f3d5;
  --line: rgba(31, 90, 45, 0.14);
  --shadow: 0 24px 70px rgba(40, 91, 52, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 12%, rgba(121, 208, 111, 0.22), transparent 26rem),
    radial-gradient(circle at 88% 8%, rgba(255, 255, 255, 0.9), transparent 20rem),
    linear-gradient(180deg, #eef9ea 0%, var(--bg) 46%, #ffffff 100%);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 14px 0;
  backdrop-filter: blur(16px);
}

.site-header[data-scrolled="true"] {
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 800;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
}

.brand-text {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.brand-local,
.brand-sub {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand-sub {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.1;
}

html[lang="en"] .brand-sub {
  display: none;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
}

.top-nav a {
  padding: 9px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
}

.top-nav a:hover {
  color: var(--green-deep);
  background: var(--green-soft);
}

.language-switcher {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
}

.language-switcher button {
  min-width: 44px;
  height: 32px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
}

.language-switcher button[aria-pressed="true"] {
  color: #ffffff;
  background: var(--green-deep);
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  align-items: center;
  gap: 52px;
  width: min(1180px, calc(100% - 32px));
  min-height: calc(100vh - 74px);
  margin: 0 auto;
  padding: 48px 0 76px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green-deep);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(44px, 8vw, 86px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4.6vw, 52px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 19px;
  letter-spacing: 0;
}

.hero-text,
.section-heading p,
.download p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.hero-text {
  max-width: 640px;
  margin: 24px 0 0;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #ffffff;
  background: linear-gradient(135deg, var(--green-deep), var(--green));
  box-shadow: 0 16px 36px rgba(36, 120, 60, 0.28);
}

.button.secondary,
.button.ghost {
  color: var(--green-deep);
  background: #ffffff;
  border-color: var(--line);
}

.button.full {
  width: 100%;
}

.release-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.release-strip span {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.7);
}

.release-strip strong {
  color: var(--ink);
}

.hero-visual {
  position: relative;
  min-height: 540px;
  perspective: 1200px;
}

.hero-logo {
  position: absolute;
  top: 2%;
  right: 3%;
  width: 170px;
  opacity: 0.92;
  filter: drop-shadow(0 18px 28px rgba(38, 104, 46, 0.22));
  animation: floatLogo 6s ease-in-out infinite;
}

.hero-screen {
  position: absolute;
  left: 0;
  bottom: 6%;
  width: min(620px, 100%);
  border: 1px solid rgba(255, 255, 255, 0.86);
  border-radius: 8px;
  box-shadow: var(--shadow);
  transform: rotateY(-7deg) rotateX(3deg);
  transform-origin: center;
}

.signal-card {
  position: absolute;
  right: 6%;
  bottom: 12%;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 14px 40px rgba(48, 107, 57, 0.18);
  font-weight: 800;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(98, 185, 95, 0.55);
  animation: pulse 1.8s infinite;
}

.intro-band,
.features,
.gallery,
.requirements,
.compatibility,
.download {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 78px 0;
}

.intro-band img {
  width: min(720px, 100%);
  margin: 0 auto;
  border-radius: 8px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  min-height: 230px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: rgba(36, 120, 60, 0.28);
  box-shadow: 0 20px 54px rgba(36, 120, 60, 0.13);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 58px;
  height: 34px;
  margin-bottom: 30px;
  padding: 0 10px;
  border-radius: 999px;
  color: var(--green-deep);
  background: var(--green-soft);
  font-size: 12px;
  font-weight: 900;
}

.feature-card p {
  margin: 13px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.showcase {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

figure {
  margin: 0;
}

.showcase figure,
.download-panel {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 20px 56px rgba(39, 92, 49, 0.12);
}

.showcase img {
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

figcaption {
  padding: 14px 16px;
  color: var(--muted);
  font-weight: 800;
}

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

.requirement-list div {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.requirement-list strong,
.requirement-list span {
  display: block;
}

.requirement-list span {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.65;
}

.compat-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 20px 56px rgba(39, 92, 49, 0.1);
}

.compat-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

.compat-table th,
.compat-table td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  text-align: center;
  vertical-align: middle;
}

.compat-table th:first-child,
.compat-table td:first-child {
  text-align: left;
}

.compat-table thead th {
  color: var(--green-deep);
  background: #edf9ea;
  font-size: 14px;
}

.compat-table tbody th {
  color: var(--ink);
  font-weight: 800;
}

.compat-table tbody tr:last-child th,
.compat-table tbody tr:last-child td {
  border-bottom: 0;
}

.compat-table .yes {
  color: var(--green-deep);
  font-size: 22px;
  font-weight: 900;
}

.compat-table .no {
  color: var(--muted);
}

.download {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 42px;
  align-items: center;
  margin-bottom: 40px;
  padding: 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(227, 247, 222, 0.9)),
    var(--panel);
  box-shadow: var(--shadow);
}

.download-panel {
  display: grid;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

html[lang="en"] .china-downloads,
html[lang="ja"] .china-downloads {
  display: none;
}

html[lang="zh-CN"] .download-link {
  order: 3;
  color: var(--green-deep);
  background: #ffffff;
  border-color: var(--line);
  box-shadow: none;
}

.china-downloads {
  display: grid;
  gap: 12px;
}

.link-icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 900;
}

.github-icon {
  color: #ffffff;
  background: #24292f;
}

.github-icon::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50% 50% 45% 45%;
  background: currentColor;
  box-shadow: 0 -5px 0 -3px currentColor, -5px -4px 0 -3px currentColor, 5px -4px 0 -3px currentColor;
}

.quark-icon {
  color: #ffffff;
  background: linear-gradient(135deg, #1e8cff, #65c8ff);
}

.baidu-icon {
  color: #ffffff;
  background: linear-gradient(135deg, #2864ff, #6c8cff);
}

.version-box {
  padding: 18px;
  border-radius: 8px;
  background: #edf9ea;
}

.version-box span,
.version-box small {
  display: block;
  color: var(--muted);
}

.version-box strong {
  display: block;
  margin: 7px 0;
  font-size: 28px;
}

.source-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 10px 4px 2px;
  color: var(--green-deep);
  font-weight: 800;
  text-align: center;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 38px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.section-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.section-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes floatLogo {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-14px) rotate(3deg);
  }
}

@keyframes pulse {
  70% {
    box-shadow: 0 0 0 12px rgba(98, 185, 95, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(98, 185, 95, 0);
  }
}

@media (max-width: 920px) {
  .hero,
  .download {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: 470px;
  }

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

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .top-nav {
    width: 100%;
    justify-content: space-between;
  }

  .language-switcher {
    width: 100%;
    justify-content: space-between;
  }

  .language-switcher button {
    flex: 1;
  }

  .top-nav a {
    flex: 1;
    text-align: center;
  }

  .hero {
    padding-top: 28px;
  }

  h1 {
    font-size: 44px;
  }

  .hero-visual {
    min-height: 350px;
  }

  .hero-logo {
    width: 118px;
  }

  .signal-card {
    right: 0;
    bottom: 2%;
  }

  .showcase,
  .feature-grid,
  .requirement-list {
    grid-template-columns: 1fr;
  }

  .download {
    padding: 28px 18px;
  }

  .site-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}