* {
  box-sizing: border-box;
}

:root {
  --blue: #2c82f6;
  --blue-deep: #2167cf;
  --ink: #2f4059;
  --muted: #8190a5;
  --line: #e8edf4;
  --page-width: 656px;
  --shadow: 0 18px 42px rgba(77, 113, 173, 0.12);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #ffffff;
  font-family: Arial, "Noto Sans SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

button {
  border: 0;
  color: inherit;
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.topbar {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 20;
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 10px 13px;
  color: #7790ae;
  font-size: 10px;
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.topbar.is-scrolled {
  position: fixed;
  background: rgba(250, 252, 255, 0.88);
  box-shadow: 0 1px 12px rgba(57, 88, 132, 0.08);
  backdrop-filter: blur(12px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  color: var(--blue);
  font-weight: 700;
  letter-spacing: -0.06em;
}

.brand {
  font-size: 14px;
}

.brand-mark {
  display: block;
  width: 16px;
  height: 14px;
}

.brand-mark svg {
  display: block;
  width: 100%;
  height: 100%;
}

.brand-name {
  transform: translateY(-1px);
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 17px;
}

.top-nav a,
.top-nav button {
  padding: 2px 0;
  background: transparent;
  color: #71839c;
  cursor: pointer;
  font-size: 10px;
  transition: color 0.2s ease;
}

.top-nav a:hover,
.top-nav button:hover {
  color: var(--blue);
}

.hero {
  position: relative;
  min-height: 440px;
  overflow: hidden;
  background:
    radial-gradient(46% 80% at 89% 5%, rgba(191, 211, 255, 0.72), transparent 71%),
    radial-gradient(38% 82% at 69% 93%, rgba(207, 224, 255, 0.92), transparent 72%),
    radial-gradient(33% 72% at 5% 78%, rgba(235, 242, 255, 0.95), transparent 77%),
    linear-gradient(128deg, #ffffff 0%, #f9fbff 57%, #eef4ff 100%);
}

.hero::after {
  position: absolute;
  top: -190px;
  right: -80px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: rgba(220, 231, 255, 0.58);
  content: "";
  filter: blur(32px);
  pointer-events: none;
}

.hero-haze {
  position: absolute;
  border-radius: 50%;
  filter: blur(25px);
  pointer-events: none;
}

.hero-haze-right {
  top: 122px;
  right: 10%;
  width: 170px;
  height: 210px;
  background: rgba(160, 190, 255, 0.18);
  transform: rotate(25deg);
}

.hero-haze-bottom {
  bottom: -170px;
  left: 29%;
  width: 280px;
  height: 280px;
  background: rgba(210, 227, 255, 0.34);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  width: min(var(--page-width), calc(100% - 40px));
  margin: 0 auto;
  padding: 73px 0 125px;
  grid-template-columns: 346px 242px;
  align-items: end;
  column-gap: 60px;
}

.hero-copy {
  min-width: 0;
}

.release-note {
  max-width: 330px;
  margin: 0;
  color: #8b9bb1;
  font-size: 9px;
  line-height: 1.55;
}

.release-note span {
  margin-right: 4px;
  color: #658ee0;
}

.hero h1 {
  margin: 39px 0 8px;
  color: var(--blue);
  font-size: 53px;
  font-weight: 500;
  letter-spacing: -0.075em;
  line-height: 0.95;
}

.hero-tagline {
  margin: 0;
  color: #3e5879;
  font-size: 18px;
  letter-spacing: -0.05em;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(2, 163px);
  gap: 17px;
  margin-top: 42px;
}

.entry-card {
  display: flex;
  min-height: 75px;
  flex-direction: column;
  justify-content: center;
  padding: 0 17px;
  border: 1px solid rgba(222, 230, 241, 0.83);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 8px 20px rgba(106, 137, 187, 0.06);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.entry-card:hover {
  border-color: rgba(44, 130, 246, 0.36);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.entry-card strong {
  color: #367edb;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.entry-card span {
  margin-top: 6px;
  color: #8795a8;
  font-size: 9px;
  line-height: 1.5;
}

.feature-card {
  position: relative;
  display: flex;
  min-height: 181px;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  padding: 0 22px 23px;
  border: 1px solid rgba(156, 186, 248, 0.45);
  border-radius: 9px;
  background: linear-gradient(143deg, rgba(174, 201, 255, 0.9) 0%, rgba(89, 130, 224, 0.96) 100%);
  box-shadow: 0 16px 34px rgba(77, 115, 195, 0.2);
  color: #ffffff;
  isolation: isolate;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.feature-card:hover {
  box-shadow: 0 22px 46px rgba(68, 104, 186, 0.28);
  transform: translateY(-3px);
}

.feature-card::before {
  position: absolute;
  right: -46px;
  bottom: -36px;
  width: 205px;
  height: 160px;
  border: 1px solid rgba(255, 255, 255, 0.23);
  border-radius: 50%;
  content: "";
  transform: rotate(31deg);
}

.feature-card::after {
  position: absolute;
  right: -18px;
  bottom: -15px;
  width: 150px;
  height: 125px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  content: "";
  transform: rotate(31deg);
}

.feature-sheen {
  position: absolute;
  top: -18px;
  right: 26px;
  width: 90px;
  height: 110px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.11);
  filter: blur(11px);
}

.feature-lines {
  position: absolute;
  right: 22px;
  bottom: 32px;
  width: 122px;
  height: 78px;
  border-top: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 50%;
  transform: rotate(32deg);
}

.feature-lines::before,
.feature-lines::after {
  position: absolute;
  right: -8px;
  width: 94px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  content: "";
}

.feature-lines::before {
  top: 16px;
}

.feature-lines::after {
  top: 34px;
}

.feature-kicker,
.feature-card h2,
.feature-link {
  position: relative;
  z-index: 1;
}

.feature-kicker {
  margin-bottom: 14px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 9px;
}

.feature-card h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1.38;
}

.feature-link {
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 9px;
}

.feature-link span {
  margin-left: 4px;
  font-size: 12px;
}

.link-panel {
  min-height: 235px;
  border-top: 1px solid #edf1f6;
  background: #ffffff;
}

.link-inner {
  display: grid;
  width: min(var(--page-width), calc(100% - 40px));
  margin: 0 auto;
  padding: 34px 0 33px;
  grid-template-columns: 190px repeat(4, 1fr);
  gap: 30px;
}

.footer-brand {
  align-self: start;
  font-size: 16px;
}

.footer-brand .brand-mark {
  width: 18px;
  height: 15px;
}

.link-group {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.link-group h2 {
  margin: 0 0 2px;
  color: #35445a;
  font-size: 10px;
  font-weight: 600;
}

.link-group a {
  color: #8995a6;
  font-size: 9px;
  line-height: 1.35;
  transition: color 0.2s ease;
}

.link-group a:hover {
  color: var(--blue);
}

.copyright {
  width: min(var(--page-width), calc(100% - 40px));
  margin: 0 auto;
  padding: 0 0 22px;
  color: #bbc4d0;
  font-size: 9px;
}

.toast {
  position: fixed;
  bottom: 22px;
  left: 50%;
  z-index: 30;
  max-width: calc(100% - 32px);
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(39, 74, 133, 0.92);
  box-shadow: 0 12px 25px rgba(45, 83, 149, 0.22);
  color: #ffffff;
  font-size: 10px;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

@media (max-width: 860px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 28px;
  }

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

  .link-inner {
    grid-template-columns: 150px repeat(4, 1fr);
    gap: 20px;
  }
}

@media (max-width: 680px) {
  .topbar {
    padding: 10px 20px;
  }

  .top-nav {
    gap: 12px;
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    width: min(100% - 40px, 440px);
    padding: 76px 0 56px;
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .hero h1 {
    margin-top: 35px;
    font-size: 50px;
  }

  .entry-grid {
    gap: 10px;
    margin-top: 32px;
  }

  .entry-card {
    padding: 0 13px;
  }

  .feature-card {
    min-height: 165px;
  }

  .link-panel {
    min-height: 0;
  }

  .link-inner {
    width: min(100% - 40px, 440px);
    grid-template-columns: repeat(2, 1fr);
    gap: 29px 22px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .copyright {
    width: min(100% - 40px, 440px);
  }
}

@media (max-width: 420px) {
  .top-nav a:first-child {
    display: none;
  }

  .hero-inner {
    width: calc(100% - 32px);
  }

  .entry-card strong {
    font-size: 12px;
  }

  .entry-card span {
    font-size: 8px;
  }

  .link-inner,
  .copyright {
    width: calc(100% - 32px);
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* Readability tuning: keep the reference layout, use a comfortable 100% scale. */
.hero-inner {
  padding: 73px 0 110px;
}

.hero h1 {
  margin-top: 22px;
}

.entry-grid {
  margin-top: 30px;
}

.entry-card {
  min-height: 76px;
}

.feature-card {
  min-height: 198px;
}
.topbar {
  padding: 12px 15px;
  font-size: 13px;
}

.brand {
  font-size: 18px;
}

.brand-mark {
  width: 20px;
  height: 17px;
}

.top-nav {
  gap: 20px;
}

.top-nav a,
.top-nav button {
  font-size: 13px;
}

.release-note {
  font-size: 12px;
  line-height: 1.5;
}

.hero h1 {
  font-size: 62px;
}

.hero-tagline {
  font-size: 22px;
}

.entry-card {
  min-height: 86px;
}

.entry-card strong {
  font-size: 16px;
}

.entry-card span {
  margin-top: 7px;
  font-size: 12px;
  line-height: 1.48;
}

.feature-kicker {
  margin-bottom: 12px;
  font-size: 12px;
}

.feature-card h2 {
  font-size: 22px;
}

.feature-link {
  margin-top: 16px;
  font-size: 12px;
}

.feature-link span {
  font-size: 15px;
}

.footer-brand {
  font-size: 19px;
}

.link-group {
  gap: 9px;
}

.link-group h2 {
  font-size: 13px;
}

.link-group a {
  font-size: 12px;
}

.copyright {
  font-size: 11px;
}

.toast {
  font-size: 13px;
}

@media (max-width: 680px) {
  .hero-inner {
    padding: 76px 0 56px;
  }

  .entry-grid {
    margin-top: 32px;
  }

  .feature-card {
    min-height: 165px;
  }

  .topbar {
    padding: 11px 20px;
    font-size: 12px;
  }

  .brand {
    font-size: 17px;
  }

  .top-nav {
    gap: 14px;
  }

  .top-nav a,
  .top-nav button {
    font-size: 12px;
  }

  .hero h1 {
    margin-top: 35px;
    font-size: 58px;
  }

  .hero-tagline {
    font-size: 21px;
  }

  .entry-card {
    min-height: 84px;
  }

  .entry-card strong {
    font-size: 15px;
  }

  .entry-card span {
    font-size: 11px;
  }

  .feature-card h2 {
    font-size: 21px;
  }

  .link-group h2 {
    font-size: 12px;
  }

  .link-group a {
    font-size: 11px;
  }
}

/* When the preview frame exposes a wide CSS viewport, restore the intended visual scale. */
@media (min-width: 1400px) {
  :root {
    --page-width: 984px;
  }

  .topbar {
    padding: 18px 23px;
    font-size: 19px;
  }

  .brand {
    font-size: 27px;
  }

  .brand-mark {
    width: 30px;
    height: 26px;
  }

  .top-nav {
    gap: 30px;
  }

  .top-nav a,
  .top-nav button {
    font-size: 19px;
  }

  .hero {
    min-height: 660px;
  }

  .hero::after {
    top: -285px;
    right: -120px;
    width: 720px;
    height: 720px;
    filter: blur(48px);
  }

  .hero-haze-right {
    top: 183px;
    width: 255px;
    height: 315px;
  }

  .hero-haze-bottom {
    bottom: -255px;
    width: 420px;
    height: 420px;
  }

  .hero-inner {
    padding: 110px 0 165px;
    grid-template-columns: 519px 363px;
    column-gap: 90px;
  }

  .release-note {
    max-width: 495px;
    font-size: 18px;
  }

  .hero h1 {
    margin-top: 33px;
    font-size: 93px;
  }

  .hero-tagline {
    font-size: 33px;
  }

  .entry-grid {
    grid-template-columns: repeat(2, 245px);
    gap: 26px;
    margin-top: 45px;
  }

  .entry-card {
    min-height: 114px;
    padding: 0 26px;
  }

  .entry-card strong {
    font-size: 24px;
  }

  .entry-card span {
    margin-top: 11px;
    font-size: 18px;
  }

  .feature-card {
    min-height: 297px;
    padding: 0 33px 35px;
  }

  .feature-card::before {
    right: -69px;
    bottom: -54px;
    width: 308px;
    height: 240px;
  }

  .feature-card::after {
    right: -27px;
    bottom: -23px;
    width: 225px;
    height: 188px;
  }

  .feature-sheen {
    top: -27px;
    right: 39px;
    width: 135px;
    height: 165px;
  }

  .feature-lines {
    right: 33px;
    bottom: 48px;
    width: 183px;
    height: 117px;
  }

  .feature-lines::before,
  .feature-lines::after {
    right: -12px;
    width: 141px;
  }

  .feature-lines::before {
    top: 24px;
  }

  .feature-lines::after {
    top: 51px;
  }

  .feature-kicker {
    margin-bottom: 18px;
    font-size: 18px;
  }

  .feature-card h2 {
    font-size: 33px;
  }

  .feature-link {
    margin-top: 24px;
    font-size: 18px;
  }

  .feature-link span {
    font-size: 23px;
  }

  .link-panel {
    min-height: 353px;
  }

  .link-inner {
    width: min(var(--page-width), calc(100% - 60px));
    padding: 51px 0 50px;
    grid-template-columns: 285px repeat(4, 1fr);
    gap: 45px;
  }

  .footer-brand {
    font-size: 29px;
  }

  .footer-brand .brand-mark {
    width: 27px;
    height: 23px;
  }

  .link-group {
    gap: 14px;
  }

  .link-group h2 {
    font-size: 20px;
  }

  .link-group a {
    font-size: 18px;
  }

  .copyright {
    width: min(var(--page-width), calc(100% - 60px));
    padding-bottom: 33px;
    font-size: 16px;
  }
}

@media (max-width: 420px) {
  .top-nav a,
  .top-nav button {
    font-size: 11px;
  }

  .hero h1 {
    font-size: 54px;
  }

  .entry-card {
    min-height: 80px;
    padding-right: 10px;
    padding-left: 10px;
  }

  .entry-card strong {
    font-size: 14px;
  }

  .entry-card span {
    font-size: 10px;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.feature-image {
  position: absolute;
  z-index: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  mix-blend-mode: screen;
  transition: opacity 0.35s ease;
}

.feature-sheen,
.feature-lines {
  z-index: 1;
}

.feature-kicker,
.feature-card h2,
.feature-link {
  z-index: 2;
}

.feature-card.has-image .feature-image {
  opacity: 0.28;
}