:root {
  color-scheme: light;
  --page: #f7f9fc;
  --surface: rgba(255, 255, 255, 0.88);
  --text: #151619;
  --muted: #687080;
  --line: rgba(29, 63, 111, 0.1);
  --blue: #087cf0;
  --blue-hover: #1688f5;
  --max-width: 1360px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--page);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
main { overflow: hidden; }

.site-header {
  position: relative;
  z-index: 5;
  width: min(calc(100% - 48px), var(--max-width));
  height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 11px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.admin-link {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  color: #536072;
  font-size: 14px;
  transition: color 160ms ease;
}

.admin-link i { font-size: 18px; }

.header-download {
  min-height: 42px;
  padding: 0 19px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 9px 22px rgba(8, 124, 240, 0.22);
  transition: transform 160ms ease, background-color 160ms ease;
}

.hero {
  min-height: 880px;
  padding: 60px 24px 34px;
  background-color: #fbfdff;
  background-image: url("/assets/liquid-silver-background.png");
  background-position: center bottom;
  background-size: 100% auto;
  background-repeat: no-repeat;
}

.hero-inner {
  width: min(100%, 1320px);
  min-height: 516px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 45% 55%;
  align-items: center;
  min-width: 0;
}

.hero-copy-block {
  position: relative;
  z-index: 2;
  padding: 12px 28px 0 0;
  min-width: 0;
}

.platform-pill {
  width: fit-content;
  min-height: 31px;
  margin: 0 0 30px;
  padding: 0 13px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(8, 124, 240, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: #4d8fe2;
  font-size: 12px;
  font-weight: 600;
  box-shadow: 0 8px 22px rgba(58, 113, 181, 0.06);
}

.hero-brand {
  display: flex;
  align-items: center;
  gap: 19px;
}

.hero-icon {
  flex: 0 0 auto;
  width: 72px;
  height: 72px;
  border-radius: 18px;
  box-shadow: 0 16px 34px rgba(8, 124, 240, 0.2);
}

.hero h1 {
  margin: 0;
  font-size: clamp(42px, 4vw, 57px);
  line-height: 1.06;
  font-weight: 750;
  letter-spacing: -0.055em;
  white-space: nowrap;
}

.hero-tagline {
  margin: 26px 0 0;
  color: #3f4e62;
  font-size: clamp(24px, 2.25vw, 32px);
  line-height: 1.25;
  font-weight: 470;
  letter-spacing: -0.035em;
  white-space: nowrap;
}

.hero-copy {
  margin: 20px 0 34px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.download-button {
  width: 266px;
  min-height: 56px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border-radius: 9px;
  background: var(--blue);
  color: #fff;
  font-size: 17px;
  font-weight: 650;
  box-shadow: 0 14px 30px rgba(8, 124, 240, 0.28);
  transition: transform 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.download-button > i:first-child { font-size: 23px; }
.download-arrow { margin-left: auto; font-size: 19px; }

.release-meta {
  min-height: 22px;
  margin-top: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #8290a3;
  font-size: 12px;
}

.meta-separator { color: #c4ccd6; }

.product-stage {
  position: relative;
  z-index: 1;
  margin-left: -4px;
  margin-right: -30px;
  padding: 8px;
  border: 1px solid rgba(65, 89, 125, 0.16);
  border-radius: 18px;
  background: #e9eef5;
  box-shadow: 0 34px 74px rgba(42, 65, 96, 0.25), 0 5px 18px rgba(42, 65, 96, 0.12);
  transform: perspective(1800px) rotateY(-0.7deg);
}

.product-stage img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 11px;
}

.feature-strip {
  width: min(100%, 1360px);
  min-height: 154px;
  margin: 104px auto 0;
  padding: 28px 30px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  align-items: center;
  border: 1px solid rgba(29, 63, 111, 0.09);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 24px 60px rgba(59, 90, 128, 0.12);
  backdrop-filter: blur(20px);
}

.feature-strip article {
  min-height: 78px;
  padding: 0 24px;
  display: flex;
  align-items: flex-start;
  gap: 15px;
  border-right: 1px solid rgba(29, 63, 111, 0.1);
}

.feature-strip article:first-child { padding-left: 0; }
.feature-strip article:last-child { padding-right: 0; border-right: 0; }

.feature-strip article > i {
  flex: 0 0 auto;
  width: 47px;
  height: 47px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  background: #e9f2ff;
  color: var(--blue);
  font-size: 25px;
}

.feature-strip div { display: grid; gap: 6px; }
.feature-strip strong { font-size: 15px; font-weight: 700; }
.feature-strip span { color: #778396; font-size: 11px; line-height: 1.6; }

.site-footer {
  width: min(calc(100% - 48px), var(--max-width));
  min-height: 70px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #8b96a6;
  font-size: 12px;
}

.admin-link:hover,
.site-footer a:hover { color: var(--blue); }

.header-download:hover,
.download-button:hover {
  transform: translateY(-1px);
  background: var(--blue-hover);
}

.download-button:hover { box-shadow: 0 17px 34px rgba(8, 124, 240, 0.32); }
.header-download:active,
.download-button:active { transform: translateY(0); }

.header-download:focus-visible,
.download-button:focus-visible,
.admin-link:focus-visible,
.site-footer a:focus-visible {
  outline: 3px solid rgba(8, 124, 240, 0.34);
  outline-offset: 4px;
}

@media (max-width: 1040px) {
  .hero { padding-top: 58px; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-copy-block { max-width: 680px; margin: 0 auto; padding: 0; text-align: center; }
  .platform-pill, .download-button { margin-left: auto; margin-right: auto; }
  .hero-brand { justify-content: center; }
  .release-meta { justify-content: center; }
  .product-stage { width: min(100%, 820px); margin: 0 auto; transform: none; }
  .feature-strip { grid-template-columns: repeat(2, 1fr); gap: 28px 0; }
  .feature-strip article:nth-child(2) { border-right: 0; }
}

@media (max-width: 700px) {
  .site-header { width: calc(100% - 32px); height: 66px; }
  .brand { gap: 9px; font-size: 15px; }
  .brand img { width: 34px; height: 34px; border-radius: 9px; }
  .site-header nav { gap: 12px; }
  .header-download { display: none; }
  .admin-link { font-size: 13px; }
  .hero { min-height: auto; padding: 42px 18px 28px; background-size: auto 72%; }
  .platform-pill { margin-bottom: 23px; }
  .hero-brand { gap: 12px; }
  .hero-icon { width: 54px; height: 54px; border-radius: 14px; }
  .hero-brand { flex-direction: column; justify-content: center; }
  .hero h1 { font-size: 32px; white-space: normal; }
  .hero-tagline { max-width: 320px; margin: 22px auto 0; font-size: 20px; white-space: normal; }
  .hero-copy { margin: 15px auto 25px; max-width: 320px; font-size: 14px; }
  .download-button { width: min(100%, 280px); }
  .release-meta { flex-wrap: wrap; gap: 6px 9px; }
  .meta-separator { display: none; }
  .hero-inner { gap: 36px; }
  .product-stage { width: calc(100% + 40px); margin-left: -20px; padding: 5px; border-radius: 12px; overflow: hidden; }
  .product-stage img { width: 150%; max-width: none; border-radius: 8px; }
  .feature-strip { margin-top: 35px; padding: 28px 22px; grid-template-columns: 1fr; gap: 25px; }
  .feature-strip article { min-height: 0; padding: 0 0 25px; border-right: 0; border-bottom: 1px solid rgba(29, 63, 111, 0.1); }
  .feature-strip article:last-child { padding-bottom: 0; border-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .header-download, .download-button, .admin-link { transition: none; }
}