:root {
  --paper: #ffffff;
  --paper-soft: #f7faf9;
  --paper-wash: #eef8f5;
  --ink: #081d1a;
  --ink-soft: #36504b;
  --muted: #6a7d79;
  --line: #dce9e6;
  --brand: #087f72;
  --brand-deep: #05685e;
  --brand-wash: #dff4ef;
  --accent: #e65f50;
  --accent-wash: #fff0ed;
  --night: #0b2824;
  --night-soft: #123a34;
  --white: #ffffff;
  --shadow-soft: 0 24px 60px rgba(8, 47, 41, 0.12);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --wrap: 1060px;
  --header-h: 64px;
  --h1: 50px;
  --h2: 30px;
  --h3: 18px;
  --body: 16px;
  --small: 14px;
  --tiny: 12px;
  --display: 40px;
  --radius-panel: 28px;
  --radius-card: 28px;
  --radius-control: 999px;
  --s1: 8px;
  --s2: 16px;
  --s3: 24px;
  --s4: 40px;
  --s5: 64px;
  --s6: 96px;
  --s7: 128px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--body);
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

body.reader-open {
  overflow: hidden;
}

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

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

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

[hidden] {
  display: none !important;
}

.wrap {
  width: min(calc(100% - 48px), var(--wrap));
  margin-inline: auto;
}

.site-header {
  display: block;
  position: sticky;
  z-index: 50;
  top: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  height: 100%;
  gap: var(--s4);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-name {
  display: inline-block;
  min-width: 0;
}

.brand-lockup img {
  width: 32px;
  height: 32px;
  border-radius: 9px;
}

.site-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  font-weight: 500;
}

.site-nav a,
.header-actions a {
  padding: 8px 2px;
  white-space: nowrap;
}

.site-nav a:hover,
.header-actions a:hover {
  color: var(--brand);
}

.site-nav a[aria-current="page"] {
  padding-inline: 10px;
  border-radius: var(--radius-control);
  background: var(--brand-wash);
  color: var(--brand-deep);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--s2);
  font-size: 14px;
  font-weight: 500;
}

.lang-box {
  position: relative;
}

.lang-trigger {
  display: inline-flex;
  position: relative;
  align-items: center;
  min-height: 40px;
  gap: 10px;
  padding: 0 30px 0 12px;
  border: 0;
  border-radius: var(--radius-control);
  background: var(--paper-soft);
  color: var(--ink);
}

.lang-trigger::after {
  position: absolute;
  top: 50%;
  right: 13px;
  width: 7px;
  height: 7px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  content: "";
  pointer-events: none;
  transform: translateY(calc(-50% - 1px)) rotate(45deg);
}

.lang-chevron {
  display: none;
  position: absolute;
  top: 50%;
  right: 12px;
  width: 7px;
  height: 7px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: translateY(calc(-50% - 1px)) rotate(45deg);
  pointer-events: none;
}

.lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  display: grid;
  min-width: 152px;
  padding: 8px;
  border-radius: var(--radius-panel);
  background: var(--paper);
  box-shadow: var(--shadow-soft);
}

.lang-menu a {
  padding: 9px 10px;
  border-radius: var(--radius-control);
  color: var(--ink);
}

.lang-menu a:hover {
  background: var(--brand-wash);
  color: var(--brand-deep);
}

.mobile-nav-toggle,
.nav-drawer {
  display: none;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 43px;
  padding: 0 20px;
  border: 0;
  border-radius: var(--radius-control);
  background: var(--brand);
  color: var(--white);
  font-size: 16px;
  font-weight: 500;
}

.button:hover {
  background: var(--brand-deep);
  color: var(--white);
}

.button.secondary {
  background: var(--paper-soft);
  color: var(--brand-deep);
}

.button.secondary:hover {
  background: var(--brand-wash);
  color: var(--brand-deep);
}

.button.light {
  background: var(--white);
  color: var(--brand-deep);
}

.button.light:hover {
  background: var(--brand-wash);
  color: var(--brand-deep);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-width: 0;
  max-width: min(100%, calc(100vw - 48px));
  overflow-wrap: anywhere;
  margin: 0 0 var(--s3);
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--accent-wash);
  color: #a43c31;
  font-size: var(--small);
  font-weight: 500;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.eyebrow + h1,
.eyebrow + h2 {
  margin-top: 20px;
}

h1 {
  margin-bottom: var(--s3);
  font-size: var(--h1);
  font-weight: 500;
  font-synthesis: none;
  letter-spacing: normal;
  line-height: 1.12;
}

h1 em,
h1 span {
  font-weight: 500;
  font-style: normal;
}

h2 {
  margin-bottom: var(--s3);
  font-size: var(--h2);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

h3 {
  margin-bottom: var(--s2);
  font-size: var(--h3);
  font-weight: 600;
  line-height: 1.35;
}

p {
  font-weight: 400;
}

.section-intro {
  max-width: 620px;
  margin-bottom: var(--s4);
  color: var(--ink-soft);
}

.site-footer {
  background: var(--night);
  color: var(--white);
}

.footer-inner {
  padding-block: var(--s5) var(--s4);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr repeat(3, minmax(0, 1fr));
  gap: var(--s4);
  align-items: start;
}

.footer-brand p {
  max-width: 290px;
  margin: var(--s2) 0 0;
  color: #b9d1cc;
  font-size: var(--small);
}

.footer-brand .brand-lockup {
  color: var(--white);
}

.footer-brand .brand-lockup img {
  padding: 0;
  border-radius: 9px;
  background: transparent;
}

.footer-group strong {
  display: block;
  margin-bottom: var(--s2);
  font-size: var(--small);
  font-weight: 600;
}

.footer-group a {
  display: block;
  width: fit-content;
  margin-top: 10px;
  color: #b9d1cc;
  font-size: var(--small);
}

.footer-group a:hover {
  color: var(--white);
}

.footer-support {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-top: var(--s4);
  padding: 24px;
  border-radius: var(--radius-card);
  background: var(--night-soft);
  color: var(--white);
}

.footer-support p {
  margin: 8px 0 16px;
  color: #c8ddd9;
  font-size: var(--small);
}

.footer-support a[href^="mailto:"] {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: var(--radius-control);
  background: var(--white);
  color: var(--brand-deep);
}

.footer-support a[href^="mailto:"]:hover {
  background: var(--brand-wash);
  color: var(--brand-deep);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: var(--s3);
  margin-top: var(--s4);
  padding-top: var(--s3);
  border-top: 1px solid #28504a;
  color: #9ebdb7;
  font-size: var(--tiny);
}

@media (max-width: 900px) {
  .site-nav,
  .header-actions > a {
    display: none;
  }

  .header-inner {
    grid-template-columns: auto 1fr auto;
    gap: var(--s2);
  }

  .mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 0;
    border-radius: var(--radius-control);
    background: var(--paper-soft);
    color: var(--ink);
  }

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

  header.site-header .nav-drawer,
  header.site-header [data-nav-drawer].nav-drawer {
    position: fixed;
    z-index: 60;
    top: var(--header-h);
    left: 16px;
    right: auto;
    width: min(280px, calc(100vw - 32px));
    padding: 12px;
    border-radius: var(--radius-panel);
    background: var(--paper);
    box-shadow: var(--shadow-soft);
  }

  .nav-drawer.is-open {
    display: grid;
  }

  .nav-drawer a {
    padding: 11px 12px;
    border-radius: var(--radius-control);
    text-align: left;
  }

  .nav-drawer a:hover {
    background: var(--brand-wash);
    color: var(--brand-deep);
  }

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

@media (max-width: 600px) {
  .wrap {
    width: min(calc(100% - 32px), var(--wrap));
  }

  .brand-lockup span {
    font-size: 15px;
  }

  .header-inner > .brand-lockup {
    justify-self: center;
  }

  .header-actions .lang-trigger {
    width: 40px;
    overflow: hidden;
    gap: 0;
    padding: 0;
    font-size: 0;
  }

  .lang-trigger > span {
    display: none;
  }

  .lang-chevron {
    right: 17px;
  }

  .footer-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--s4);
  }

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