:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --bg-accent: rgba(36, 91, 255, 0.16);
  --bg-accent-2: rgba(16, 148, 136, 0.13);
  --card: #ffffff;
  --text: #141821;
  --muted: #5d6778;
  --accent: #245bff;
  --accent-strong: #1a46d6;
  --border: #e3e7ee;
  --hover: #f3f6fb;
  --shadow: 0 18px 50px rgba(20, 24, 33, 0.08);
  --header: rgba(244, 246, 248, 0.82);
  --icon-bg: #eef2ff;
  --icon-fg: #245bff;
  --sale: #e11d48;
  --shell: 1160px;
  --rise: 0.55s cubic-bezier(0.22, 1, 0.36, 1);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0d1118;
    --bg-accent: rgba(88, 124, 255, 0.24);
    --bg-accent-2: rgba(45, 180, 166, 0.16);
    --card: #161c27;
    --text: #f3f5f8;
    --muted: #a7b0c0;
    --accent: #6d8bff;
    --accent-strong: #4d6ef2;
    --border: #2a3344;
    --hover: #1d2533;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
    --header: rgba(13, 17, 24, 0.78);
    --icon-bg: #1c2744;
    --icon-fg: #9db4ff;
    --sale: #ff6b85;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(920px 460px at 88% -8%, var(--bg-accent), transparent 62%),
    radial-gradient(760px 420px at -8% 16%, var(--bg-accent-2), transparent 58%),
    linear-gradient(180deg, color-mix(in srgb, var(--card) 35%, transparent), transparent 28%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(color-mix(in srgb, var(--border) 70%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--border) 70%, transparent) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 55% at 50% 0%, #000 20%, transparent 75%);
  opacity: 0.45;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

::selection {
  background: color-mix(in srgb, var(--accent) 28%, transparent);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 40;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.shell {
  width: min(var(--shell), calc(100% - 3rem));
  margin-inline: auto;
}

.header,
main,
.footer {
  position: relative;
  z-index: 1;
}

.header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  background: var(--header);
  backdrop-filter: blur(16px);
  transition: box-shadow 0.2s ease;
}

.header.is-scrolled {
  box-shadow: 0 8px 24px rgba(20, 24, 33, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.05rem;
  height: 2.05rem;
  border-radius: 9px;
  background: linear-gradient(145deg, #245bff, #109488);
  color: #fff;
  font-size: 1rem;
  font-weight: 800;
  flex: none;
  box-shadow: 0 8px 18px rgba(36, 91, 255, 0.22);
}

.console-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex: none;
  padding: 0.55rem 0.95rem 0.55rem 1.05rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 28%, transparent);
  transition: transform 0.15s ease, background 0.15s ease;
}

.console-link svg {
  width: 1rem;
  height: 1rem;
}

.console-link:hover {
  background: var(--accent-strong);
  transform: translateY(-1px);
}

main {
  flex: 1;
  width: min(var(--shell), calc(100% - 3rem));
  margin: 0 auto;
}

.hero {
  padding: 1.6rem 0 2.25rem;
}

.hero-copy {
  min-width: 0;
  text-align: center;
  animation: rise var(--rise) both;
}

.eyebrow {
  display: inline-flex;
  margin: 0 0 1.05rem;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--accent) 28%, var(--border));
  background: color-mix(in srgb, var(--accent) 10%, var(--card));
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.05rem, 3.8vw, 3.05rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
  font-weight: 800;
}

.hero-accent {
  color: #b8860b;
  background-image: linear-gradient(100deg, #f6c945 0%, #d9a406 55%, #a8760a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.download-panel {
  margin-top: 0.35rem;
  margin-bottom: 0.5rem;
  scroll-margin-top: 5.5rem;
  padding: 1.2rem;
  border: 1px solid color-mix(in srgb, var(--border) 85%, transparent);
  border-radius: 24px;
  background: color-mix(in srgb, var(--card) 88%, transparent);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  animation: rise var(--rise) 0.12s both;
}

.panel-head {
  padding: 0.35rem 0.45rem 0.95rem;
}

.panel-head h2 {
  margin: 0;
  font-size: 1.08rem;
  letter-spacing: -0.02em;
}

.panel-head p {
  margin: 0.22rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.download-list {
  display: grid;
  gap: 0.55rem;
}

.dl-card {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.85rem;
  padding: 0.88rem 0.9rem 0.88rem 0.82rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card);
  text-decoration: none;
  transition: border-color 0.15s ease, transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.dl-card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  background: var(--hover);
  transform: translateY(-1px);
}

.dl-card.is-recommended {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  background: color-mix(in srgb, var(--accent) 8%, var(--card));
  box-shadow: 0 10px 24px color-mix(in srgb, var(--accent) 12%, transparent);
}

.dl-card.is-recommended .dl-icon {
  background: var(--card);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 16%, var(--border));
}

.dl-badge {
  display: none;
  margin-left: 0;
  padding: 0.08rem 0.42rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  vertical-align: 0.12em;
  white-space: nowrap;
}

.dl-card.is-recommended .dl-badge {
  display: inline-block;
}

.dl-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 12px;
  background: var(--icon-bg);
  color: var(--icon-fg);
}

.dl-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.dl-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.dl-name {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.28rem 0.4rem;
  font-weight: 700;
  font-size: 0.98rem;
}

.dl-file {
  color: var(--muted);
  font-size: 0.78rem;
}

.dl-cta {
  padding: 0.4rem 0.82rem;
  border-radius: 999px;
  background: var(--text);
  color: var(--bg);
  font-size: 0.82rem;
  font-weight: 700;
}

.dl-card:hover .dl-cta,
.dl-card.is-recommended .dl-cta {
  background: var(--accent);
  color: #fff;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 400px);
  gap: 2.75rem;
  align-items: start;
  padding-bottom: 4.5rem;
}

.features {
  padding: 0;
}

.side {
  display: flex;
  flex-direction: column;
  gap: 0;
}

@media (min-height: 880px) {
  .side {
    position: sticky;
    top: 5.75rem;
  }
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.feature-card {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  column-gap: 0.8rem;
  row-gap: 0.7rem;
  padding: 1.35rem 1.25rem 1.4rem;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: color-mix(in srgb, var(--card) 92%, transparent);
  overflow: hidden;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
  animation: rise var(--rise) both;
}

.feature-card:nth-child(1) { animation-delay: 0.04s; }
.feature-card:nth-child(2) { animation-delay: 0.1s; }
.feature-card:nth-child(3) { animation-delay: 0.16s; }
.feature-card:nth-child(4) { animation-delay: 0.22s; }
.feature-card:nth-child(5) { animation-delay: 0.28s; }

.feature-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--accent) 32%, var(--border));
  box-shadow: 0 14px 32px color-mix(in srgb, var(--accent) 10%, transparent);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 12px;
  background: var(--icon-bg);
  color: var(--icon-fg);
}

.feature-card:nth-child(2) .feature-icon {
  background: color-mix(in srgb, #109488 16%, var(--card));
  color: #0f8f84;
}

.feature-card:nth-child(3) .feature-icon {
  background: color-mix(in srgb, #d97706 16%, var(--card));
  color: #b45309;
}

.feature-card:nth-child(4) .feature-icon {
  background: color-mix(in srgb, #7c3aed 14%, var(--card));
  color: #7c3aed;
}

.feature-card:nth-child(5) .feature-icon {
  background: color-mix(in srgb, #0ea5e9 16%, var(--card));
  color: #0284c7;
}

.feature-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

.feature-card h3 {
  margin: 0;
  font-size: 1.08rem;
  letter-spacing: -0.02em;
}

.feature-card p {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.promo-card {
  margin-bottom: 0.25rem;
  padding: 1.1rem 1.1rem 1.15rem;
  border: 1px solid color-mix(in srgb, var(--border) 85%, transparent);
  border-radius: 20px;
  background: color-mix(in srgb, var(--card) 90%, transparent);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  animation: rise var(--rise) 0.08s both;
}

.promo-head {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.95rem;
}

.promo-head-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.9rem;
  height: 1.9rem;
  flex: none;
  border-radius: 9px;
  background: color-mix(in srgb, var(--accent) 12%, var(--card));
  color: var(--accent);
}

.promo-head-icon svg {
  width: 1.05rem;
  height: 1.05rem;
}

.promo-head h2 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.promo-list {
  list-style: none;
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
}

.promo-item {
  padding: 0.7rem 0.8rem 0.75rem;
  border: 1px solid color-mix(in srgb, var(--v) 22%, var(--border));
  border-radius: 14px;
  background: color-mix(in srgb, var(--v) 6%, var(--card));
}

.promo-item[data-vendor="deepseek"] {
  --v: #4d6bfe;
}

.promo-item[data-vendor="glm"] {
  --v: #7c3aed;
}

.promo-item[data-vendor="baidu"] {
  --v: #0f766e;
}

.promo-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
}

.promo-vendor {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-width: 0;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.promo-dot {
  width: 0.5rem;
  height: 0.5rem;
  flex: none;
  border-radius: 50%;
  background: var(--v);
}

.promo-off {
  flex: none;
  padding: 0.18rem 0.62rem;
  border: 1px solid color-mix(in srgb, var(--sale) 38%, var(--border));
  border-radius: 999px;
  background: color-mix(in srgb, var(--sale) 12%, var(--card));
  color: var(--sale);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.promo-models {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.6;
  word-break: break-word;
}

.promo-include {
  color: color-mix(in srgb, var(--muted) 88%, transparent);
}

.promo-code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.78rem;
  color: color-mix(in srgb, var(--v) 74%, var(--text));
}

.promo-note {
  margin: 0.9rem 0 0;
  color: color-mix(in srgb, var(--muted) 80%, transparent);
  font-size: 0.72rem;
  line-height: 1.5;
}

.footer {
  padding: 1.25rem 0 1.6rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  text-align: center;
  font-size: 0.8rem;
}

.footer p {
  margin: 0;
}

.footer .footer-icp {
  margin: 0 0 0.7rem;
}

.footer-icp a {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.34rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--card) 82%, transparent);
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.footer-icp a::before {
  content: "";
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

.footer-icp a:hover {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 42%, var(--border));
  background: color-mix(in srgb, var(--accent) 8%, var(--card));
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 860px) {
  .hero {
    padding: 1.4rem 0 1.9rem;
  }

  .workspace {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    padding-bottom: 3.5rem;
  }
}

@media (max-width: 640px) {
  .shell,
  main {
    width: min(var(--shell), calc(100% - 2rem));
  }

  .header-inner {
    padding-block: 0.8rem;
  }

  .hero h1 {
    font-size: 1.85rem;
  }

  .promo-card {
    padding: 1rem 0.9rem;
  }

  .promo-item {
    padding: 0.65rem 0.7rem 0.7rem;
  }

  .promo-models {
    font-size: 0.78rem;
  }

  .dl-card {
    gap: 0.65rem;
    padding: 0.8rem 0.7rem;
  }

  .dl-icon {
    width: 2.25rem;
    height: 2.25rem;
  }

  .dl-name {
    font-size: 0.9rem;
  }

  .dl-cta {
    padding: 0.35rem 0.62rem;
    font-size: 0.78rem;
  }
}

@media (prefers-color-scheme: dark) {
  .header.is-scrolled {
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.22);
  }

  .feature-card:nth-child(2) .feature-icon {
    color: #5ee0d4;
  }

  .feature-card:nth-child(3) .feature-icon {
    color: #fbbf24;
  }

  .feature-card:nth-child(4) .feature-icon {
    color: #c4b5fd;
  }

  .feature-card:nth-child(5) .feature-icon {
    color: #7dd3fc;
  }

  .dl-cta {
    background: #f3f5f8;
    color: #141821;
  }

  .brand-icon {
    box-shadow: 0 8px 18px rgba(109, 139, 255, 0.28);
  }

  .hero-accent {
    color: #f4c025;
    background-image: linear-gradient(100deg, #ffe07a 0%, #f4c025 55%, #d19b12 100%);
  }
}

@media (forced-colors: active) {
  .hero-accent {
    background-image: none;
    color: CanvasText;
    -webkit-text-fill-color: CanvasText;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}