:root {
  --c-navy: #0c3c78;
  --c-navy-dark: #072a54;
  --c-sky: #0c66c2;
  --c-sky-light: #e5f1ff;
  --c-gray-100: #f4f7fb;
  --c-gray-300: #d3deeb;
  --c-gray-600: #5c6c80;
  --c-white: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--c-navy-dark);
  background: var(--c-gray-100);
  line-height: 1.6;
}

h1, h2, h3, h4 {
  font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--c-navy);
  line-height: 1.2;
  margin-top: 0;
}

a {
  color: var(--c-sky);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: #003b7a;
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 1000;
  transition: left 0.2s ease;
}
.skip-link:focus {
  left: 1rem;
  outline: 3px solid #87cefa;
}

.site-header {
  background: var(--c-navy);
  color: var(--c-white);
  box-shadow: 0 2px 8px rgba(7, 42, 84, 0.2);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}

.site-brand {
  display: flex;
  flex-direction: column;
  color: var(--c-white);
}

.site-brand__title {
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
}

.site-brand__tagline {
  font-size: 0.85rem;
  letter-spacing: 0.065em;
  text-transform: uppercase;
  opacity: 0.8;
}

.site-nav {
  display: flex;
}

.site-nav ul {
  display: flex;
  list-style: none;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--c-white);
  font-weight: 600;
  padding: 0.5rem 0.75rem;
  border-radius: 0.25rem;
  transition: background 0.2s ease-in-out;
}

.site-nav a:hover,
.site-nav a:focus {
  background: rgba(12, 102, 194, 0.2);
}

.site-nav__toggle {
  display: none;
}

.site-nav__toggle-label {
  display: none;
}

.hero {
  background: linear-gradient(135deg, var(--c-navy) 0%, var(--c-sky) 100%);
  color: var(--c-white);
  padding: 4rem 0 4rem;
}

.layout-content {
  padding-bottom: 4rem;
}

.hero__content {
  width: min(900px, 92vw);
  margin: 0 auto;
}

.hero__kicker {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: rgba(255, 255, 255, 0.72);
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin-bottom: 1rem;
  color: var(--c-white);
  text-shadow: 0 12px 30px rgba(3, 24, 52, 0.45);
}

.hero__subtitle {
  font-size: 1.1rem;
  max-width: 60ch;
  color: rgba(255, 255, 255, 0.86);
}

.hero__cta {
  margin-top: 2rem;
}

.button {
  display: inline-block;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.75rem 1.75rem;
  transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.button--primary {
  background: var(--c-white);
  color: var(--c-navy);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.button--outline {
  border: 2px solid var(--c-sky);
  color: var(--c-sky);
  background: transparent;
}

.page-title {
  background: var(--c-sky-light);
  border-bottom: 1px solid var(--c-gray-300);
  padding: 2.5rem 0;
}

.page-title__subtitle {
  margin-top: 0.5rem;
  max-width: 70ch;
  color: var(--c-gray-600);
}

.content {
  background: var(--c-white);
  border-radius: 1rem;
  box-shadow: 0 30px 60px rgba(7, 42, 84, 0.08);
  padding: clamp(1.5rem, 4vw, 3rem);
  margin-top: -2rem;
  position: relative;
  z-index: 2;
}

.content section + section {
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid var(--c-gray-300);
}

/* About page flex layout */
.content section.about-block {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.content section.about-block + section.about-block {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.about-block {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3.5rem);
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}

.about-block--reverse {
  flex-direction: row-reverse;
}

.about-block__text {
  flex: 1;
}

.about-block__text p + p {
  margin-top: 1rem;
}

.about-block__media {
  flex: 1;
  margin: 0;
}

.about-block__media img {
  width: 100%;
  display: block;
  border-radius: 1rem;
  box-shadow: 0 20px 45px rgba(7, 42, 84, 0.16);
}

.about-block__media figcaption {
  margin-top: 0.75rem;
  font-size: 0.92rem;
  color: var(--c-gray-600);
}

.about-contact {
  text-align: center;
  border-top: 1px solid var(--c-gray-300);
  padding-top: 3rem;
  margin-top: 1rem;
}

.about-contact p {
  max-width: 60ch;
  margin: 0.75rem auto 0;
}

.grid {
  display: grid;
  gap: 2rem;
}

.grid--three {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
  background: var(--c-white);
  border: 1px solid var(--c-gray-300);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: 0 8px 20px rgba(7, 42, 84, 0.08);
}

.card h3 {
  margin-top: 0;
}

.callout {
  background: var(--c-sky-light);
  border-left: 4px solid var(--c-sky);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

/* Rouge syntax highlighting theme for fenced code blocks */
figure.highlight {
  background: #0f172a;
  border-radius: 0.75rem;
  margin: 2rem 0;
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.28);
}

figure.highlight pre {
  margin: 0;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-family: "JetBrains Mono", "Fira Code", "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.95rem;
  line-height: 1.6;
  color: #e2e8f0;
  background: transparent;
}

figure.highlight code {
  background: transparent;
  padding: 0;
  color: inherit;
}

figure.highlight .lineno {
  color: #475569;
  margin-right: 1.25rem;
  display: inline-block;
  min-width: 2.5rem;
  text-align: right;
}

figure.highlight .c { color: #94a3b8; font-style: italic; }
figure.highlight .k,
figure.highlight .kd,
figure.highlight .kn,
figure.highlight .kt { color: #60a5fa; }
figure.highlight .s,
figure.highlight .s1,
figure.highlight .s2 { color: #facc15; }
figure.highlight .mi,
figure.highlight .mf { color: #a5b4fc; }
figure.highlight .o,
figure.highlight .p { color: #e2e8f0; }
figure.highlight .n,
figure.highlight .na,
figure.highlight .nb,
figure.highlight .nf { color: #38bdf8; }

.process-steps {
  counter-reset: process-step;
}

.process-steps li {
  list-style: none;
  position: relative;
  padding-left: 3.5rem;
  margin-bottom: 2rem;
}

.process-steps li::before {
  counter-increment: process-step;
  content: counter(process-step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--c-sky);
  color: var(--c-white);
  font-weight: 700;
  box-shadow: 0 3px 10px rgba(12, 102, 194, 0.3);
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.table th,
.table td {
  padding: 0.75rem 1rem;
  border: 1px solid var(--c-gray-300);
  text-align: left;
}

.table th {
  background: var(--c-sky-light);
  color: var(--c-navy);
}

.site-footer {
  margin-top: 4rem;
  background: var(--c-navy-dark);
  color: var(--c-white);
  padding-top: 3rem;
}

.site-footer__inner {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.site-footer__title {
  color: var(--c-white);
}
.site-footer h3 {
  color: #c8e2ff;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-size: 0.95rem;
}
.site-footer a {
  color: var(--c-white);
}



.site-footer__links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer__links li {
  margin-bottom: 0.5rem;
}

.site-footer__links a {
  color: var(--c-white); 
}

.site-footer__links a:hover,
.site-footer__links a:focus {
  text-decoration: underline;
}

.site-footer__legal {
  background: rgba(0, 0, 0, 0.2);
  padding: 1rem 0;
  margin-top: 2rem;
}

.site-footer__legal-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-footer__policy-links {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

.site-footer__policy-links a {
  color: var(--c-white);
  opacity: 0.9;
}

.site-footer__policy-links a:hover,
.site-footer__policy-links a:focus {
  text-decoration: underline;
}

@media (max-width: 860px) {
  .about-block {
    flex-direction: column;
    align-items: flex-start;
  }

  .about-block--reverse {
    flex-direction: column;
  }

  .about-block__media img {
    border-radius: 0.75rem;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--c-navy);
    width: min(320px, 80vw);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease-in-out, transform 0.2s ease-in-out;
    border-radius: 0 0 0.5rem 0.5rem;
    box-shadow: 0 15px 30px rgba(7, 42, 84, 0.35);
    z-index: 9999; /* Ensure mobile menu overlays page content */
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .site-nav li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .site-nav a {
    display: block;
  }

  .site-header__inner {
    position: relative;
  }

  .site-nav__toggle {
    display: none;
  }

  .site-nav__toggle-label {
    display: block;
    cursor: pointer;
    width: 2rem;
    height: 1.5rem;
    position: relative;
  }

  .site-nav__toggle-label span,
  .site-nav__toggle-label span::before,
  .site-nav__toggle-label span::after {
    position: absolute;
    left: 0;
    width: 100%;
    height: 0.2rem;
    background: var(--c-white);
    border-radius: 999px;
    transition: transform 0.2s ease-in-out;
  }

  .site-nav__toggle-label span {
    top: 50%;
    transform: translateY(-50%);
  }

  .site-nav__toggle-label span::before {
    content: "";
    top: -0.55rem;
  }

  .site-nav__toggle-label span::after {
    content: "";
    top: 0.55rem;
  }

  #nav-toggle:checked ~ .site-nav {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  #nav-toggle:checked + .site-nav__toggle-label span {
    background: transparent;
  }

  #nav-toggle:checked + .site-nav__toggle-label span::before {
    transform: translateY(0.55rem) rotate(45deg);
  }

  #nav-toggle:checked + .site-nav__toggle-label span::after {
    transform: translateY(-0.55rem) rotate(-45deg);
  }
}

@media (max-width: 600px) {
  .content {
    margin-top: -2rem;
    padding: 1.5rem;
  }

  .hero {
    padding: 3.5rem 0 2.5rem;
  }

  .site-footer__legal-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .site-footer__policy-links {
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
  }
}