@font-face {
  font-family: "Geist Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url("../assets/fonts/geist-latin-wght-normal.woff2") format("woff2-variations");
}

@font-face {
  font-family: "Geist Mono Variable";
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  src: url("../assets/fonts/geist-mono-latin-wght-normal.woff2") format("woff2-variations");
}

:root {
  color-scheme: light;
  --canvas: #ffffff;
  --paper: #f6f8fc;
  --paper-blue: #f2f7ff;
  --panel: #ffffff;
  --navy: #0e1b35;
  --line: #dce4f0;
  --line-strong: #bfd0e8;
  --text: #101827;
  --text-soft: #34445c;
  --muted: #56657b;
  --faint: #7d899b;
  --blue: #1264ff;
  --blue-deep: #084ed0;
  --blue-soft: #eaf2ff;
  --green: #0c8a65;
  --green-soft: #eaf8f3;
  --red: #b73d50;
  --sans: "Geist Variable", "PingFang SC", "Microsoft YaHei", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "Geist Mono Variable", "SFMono-Regular", "Cascadia Code", Consolas, monospace;
  --max: 1440px;
  --header: 72px;
  --radius-card: 18px;
  --radius-control: 9px;
  --shadow-sm: 0 10px 28px rgba(36, 76, 137, 0.1);
  --shadow: 0 24px 64px rgba(36, 76, 137, 0.14);
  --shadow-raised: 0 34px 84px rgba(36, 76, 137, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header) + 24px);
}

html[data-language="en"] .lang-zh,
html[data-language="zh"] .lang-en {
  display: none !important;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background: var(--canvas);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

::selection {
  background: rgba(18, 100, 255, 0.18);
  color: var(--text);
}

* {
  scrollbar-color: #b5c7df #f3f6fa;
  scrollbar-width: thin;
}

*::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

*::-webkit-scrollbar-track {
  background: #f3f6fa;
}

*::-webkit-scrollbar-thumb {
  border: 2px solid #f3f6fa;
  border-radius: 999px;
  background: #b5c7df;
}

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

button,
input {
  font: inherit;
}

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

button:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid rgba(18, 100, 255, 0.3);
  outline-offset: 3px;
}

button:active,
.button:active {
  transform: translateY(1px);
}

code,
pre {
  font-family: var(--mono);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  border-radius: 7px;
  background: var(--navy);
  color: #ffffff;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.page-frame,
.section-shell {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  height: var(--header);
  border-bottom: 1px solid rgba(203, 215, 233, 0.82);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 10px 34px rgba(31, 65, 116, 0.07);
  backdrop-filter: blur(20px) saturate(150%);
}

.nav-shell {
  display: grid;
  width: 100%;
  height: 100%;
  margin: 0 auto;
  padding-right: max(24px, calc((100vw - var(--max)) / 2 + 28px));
  padding-left: max(24px, calc((100vw - var(--max)) / 2 + 28px));
  align-items: center;
  grid-template-columns: auto 1fr auto;
  gap: 28px;
}

.brand {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.025em;
  white-space: nowrap;
}

.brand img {
  display: block;
  width: 31px;
  height: 31px;
  border-radius: 9px;
  object-fit: cover;
  box-shadow: 0 6px 16px rgba(18, 100, 255, 0.2);
}

.brand span {
  color: var(--text);
  font-size: 17px;
  font-weight: 770;
}

.brand b {
  font-weight: 570;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(15px, 1.8vw, 28px);
}

.nav-links > a,
.nav-dropdown > summary {
  position: relative;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  font-weight: 620;
  line-height: 1.4;
  list-style: none;
  white-space: nowrap;
  transition: color 180ms ease;
}

.nav-dropdown > summary::-webkit-details-marker {
  display: none;
}

.nav-dropdown > summary {
  display: flex;
  min-height: 36px;
  align-items: center;
  gap: 7px;
}

.nav-dropdown > summary::after {
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentcolor;
  border-bottom: 1.5px solid currentcolor;
  content: "";
  transform: translateY(-2px) rotate(45deg);
  transition: transform 160ms ease;
}

.nav-dropdown[open] > summary::after {
  transform: translateY(2px) rotate(225deg);
}

.nav-links > a:hover,
.nav-links > a.is-active,
.nav-links > a[aria-current="page"],
.nav-dropdown > summary:hover,
.nav-dropdown[open] > summary {
  color: var(--blue);
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-panel {
  position: absolute;
  top: calc(100% + 18px);
  left: 50%;
  display: grid;
  min-width: 184px;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 18px 48px rgba(31, 65, 116, 0.16);
  transform: translateX(-50%);
}

.nav-dropdown-panel::before {
  position: absolute;
  right: 0;
  bottom: 100%;
  left: 0;
  height: 18px;
  content: "";
}

.nav-dropdown-panel a,
.nav-dropdown-panel button {
  display: flex;
  min-height: 38px;
  padding: 8px 11px;
  align-items: center;
  border: 0;
  border-radius: 7px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-size: 13px;
  font-weight: 590;
  text-align: left;
  white-space: nowrap;
}

.nav-dropdown-panel a:hover,
.nav-dropdown-panel a[aria-current="page"],
.nav-dropdown-panel button:hover,
.nav-dropdown-panel button[aria-current="true"] {
  color: var(--blue);
  background: var(--paper-blue);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.language-toggle,
.github-link,
.menu-toggle {
  border: 0;
  border-radius: var(--radius-control);
  color: var(--muted);
  background: transparent;
}

.language-toggle {
  min-width: 42px;
  height: 36px;
  padding: 0 9px;
  cursor: pointer;
  font-size: 11px;
  font-weight: 720;
}

.language-toggle:hover,
.github-link:hover {
  color: var(--blue);
  background: var(--paper-blue);
}

.github-link {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
}

.github-link svg {
  width: 18px;
  fill: none;
  stroke: currentcolor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.menu-toggle {
  display: none;
  width: 38px;
  height: 38px;
  padding: 10px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 1.5px;
  margin: 4px 0;
  border-radius: 2px;
  background: currentcolor;
  transition: opacity 160ms ease, transform 160ms ease;
}

.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  min-height: calc(100dvh - var(--header));
  padding: clamp(58px, 6vw, 88px) clamp(28px, 5vw, 72px) 64px;
  align-items: center;
  grid-template-columns: minmax(410px, 0.9fr) minmax(560px, 1.1fr);
  gap: clamp(44px, 5vw, 74px);
  overflow: hidden;
  border-right: 1px solid var(--line);
  border-left: 1px solid var(--line);
  background: #f8fbff;
}

.hero::before {
  position: absolute;
  z-index: -1;
  top: -250px;
  right: -180px;
  width: 700px;
  height: 700px;
  border: 1px solid rgba(18, 100, 255, 0.11);
  border-radius: 50%;
  box-shadow:
    inset 0 0 0 92px rgba(255, 255, 255, 0.35),
    0 30px 90px rgba(18, 100, 255, 0.08);
  content: "";
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  min-height: 38px;
  margin: 0 0 34px;
  padding: 0 14px;
  align-items: center;
  gap: 10px;
  border: 1px solid #c9dafb;
  border-radius: 999px;
  color: var(--blue);
  background: rgba(255, 255, 255, 0.88);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 730;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.hero-badge > span + span {
  padding-left: 10px;
  border-left: 1px solid #c9dafb;
}

.hero h1 {
  max-width: 700px;
  margin: 0;
  color: var(--text);
  font-size: clamp(50px, 4.7vw, 70px);
  font-weight: 750;
  letter-spacing: -0.04em;
  line-height: 1.02;
  text-wrap: balance;
}

.hero-lede {
  max-width: 620px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  margin-top: 36px;
  flex-wrap: wrap;
  gap: 10px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  padding: 0 20px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 720;
  white-space: nowrap;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}

.ui-icon,
.button-icon,
.link-icon {
  display: block;
  flex: 0 0 auto;
  fill: currentcolor;
}

.ui-icon {
  width: 22px;
  height: 22px;
}

.button-icon {
  width: 15px;
  height: 15px;
}

.link-icon {
  width: 13px;
  height: 13px;
  transition: transform 180ms ease;
}

a:hover > .link-icon {
  transform: translateX(3px);
}

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

.button-primary {
  color: #ffffff;
  background: var(--blue);
  box-shadow: 0 16px 34px rgba(18, 100, 255, 0.24);
}

.button-primary:hover {
  background: var(--blue-deep);
}

.button-secondary {
  border-color: var(--line-strong);
  color: var(--text);
  background: #ffffff;
}

.button-secondary:hover {
  border-color: #8caada;
  color: var(--blue);
}

.gateway-hero-visual {
  position: relative;
  min-width: 0;
  margin: 0;
  padding: 10px;
  border: 1px solid #c5d6ec;
  border-radius: 20px;
  background: #eaf1fb;
  box-shadow: var(--shadow-raised);
}

.gateway-hero-visual picture {
  display: block;
  overflow: hidden;
  border: 1px solid #d1ddec;
  border-radius: 13px;
  background: #ffffff;
}

.gateway-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
}

.gateway-hero-visual figcaption {
  display: flex;
  min-height: 56px;
  padding: 10px 10px 0;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.gateway-hero-visual figcaption span,
.gateway-hero-visual figcaption small {
  display: block;
}

.gateway-hero-visual figcaption b {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.gateway-hero-visual figcaption small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 10px;
}

.gateway-hero-visual figcaption code {
  color: var(--faint);
  font-size: 9px;
  white-space: nowrap;
}

.assurance-bar {
  display: grid;
  min-height: 126px;
  grid-template-columns: minmax(170px, 0.55fr) minmax(760px, 3.45fr);
  border: 1px solid var(--line);
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

.assurance-bar > strong {
  display: flex;
  padding: 24px 28px;
  align-items: center;
  color: var(--text);
  font-size: 13px;
}

.assurance-bar ul {
  display: grid;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-left: 1px solid var(--line);
  list-style: none;
}

.assurance-bar li {
  display: grid;
  min-width: 0;
  padding: 22px;
  align-items: center;
  border-right: 1px solid var(--line);
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
}

.assurance-bar li:last-child {
  border-right: 0;
}

.assurance-bar li strong,
.assurance-bar li small {
  display: block;
}

.assurance-bar li > span {
  min-width: 0;
}

.assurance-icon {
  width: 34px;
  height: 34px;
  padding: 8px;
  border-radius: 9px;
  color: var(--blue);
  background: var(--blue-soft);
}

.assurance-bar li strong {
  color: var(--text);
  font-size: 12px;
}

.assurance-bar li small {
  margin-top: 6px;
  color: var(--faint);
  font-size: 10px;
  line-height: 1.45;
}

.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 620ms ease,
    transform 620ms cubic-bezier(0.16, 1, 0.3, 1);
}

.js .reveal[data-delay="1"] {
  transition-delay: 100ms;
}

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

[hidden] {
  display: none !important;
}

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

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

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}