:root {
  --bg: #f4f7fb;
  --bg-strong: #eaf0f8;
  --surface: #ffffff;
  --surface-soft: #f8fbff;
  --ink: #0f172a;
  --muted: #475569;
  --line: #dbe5f1;

  --brand: #0b5cad;
  --brand-strong: #114c8d;
  --brand-soft: #e8f1fb;
  --accent: #00a7b5;
  --accent-soft: #dff8fa;

  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;

  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.06);
  --shadow-card: 0 18px 44px rgba(15, 23, 42, 0.12);

  --font-display: "Sora", "Segoe UI", sans-serif;
  --font-body: "Space Grotesk", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Cascadia Mono", monospace;

  --max-width: 1180px;
  --header-h: 88px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(circle at 12% -8%, rgba(11, 92, 173, 0.16), rgba(11, 92, 173, 0) 38%),
    radial-gradient(circle at 98% 0%, rgba(0, 167, 181, 0.18), rgba(0, 167, 181, 0) 32%),
    linear-gradient(180deg, #f3f8ff 0%, #f7fbff 28%, #f4f7fb 100%);
  line-height: 1.65;
}

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

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

a:hover {
  color: var(--brand-strong);
}

.shell {
  width: min(100% - 2.25rem, var(--max-width));
  margin-inline: auto;
}

.page {
  padding-top: calc(var(--header-h) + 18px);
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(245, 250, 255, 0.92);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(17, 24, 39, 0.08);
  transition: background-color 0.24s ease, box-shadow 0.24s ease, backdrop-filter 0.24s ease;
}

.site-header.is-scrolled {
  background: rgba(245, 250, 255, 0.88);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(17, 24, 39, 0.08);
}

.nav-shell {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.4rem;
  border-radius: 999px;
  overflow: hidden;
  transition: transform 0.2s ease;
}

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

.brand img {
  width: auto;
  height: clamp(22px, 2.3vw, 32px);
  max-width: 220px;
  object-fit: contain;
  object-position: left center;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem;
  border-radius: 999px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem;
  border-radius: 999px;
  border: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.78);
}

.lang-link {
  display: inline-flex;
  align-items: center;
  gap: 0.34rem;
  color: #334155;
  padding: 0.3rem 0.5rem;
  border-radius: 999px;
  font-size: 0.77rem;
  font-weight: 700;
  border: 1px solid transparent;
}

.lang-link:hover,
.lang-link.is-active {
  background: #ffffff;
  border-color: rgba(11, 92, 173, 0.2);
  color: var(--brand-strong);
}

.lang-flag {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid rgba(15, 23, 42, 0.18);
  display: inline-block;
}

.flag-us {
  background: linear-gradient(180deg, #b22234 0 33%, #ffffff 33% 66%, #3c3b6e 66% 100%);
}

.flag-br {
  background: radial-gradient(circle at center, #ffdf00 0 45%, transparent 45%), #009b3a;
}

.flag-cn {
  background: linear-gradient(135deg, #de2910 0 70%, #ffde00 70% 100%);
}

.site-nav-link {
  font-size: 0.93rem;
  color: #1e293b;
  font-weight: 600;
  padding: 0.48rem 0.95rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.site-nav-link:hover,
.site-nav-link.is-active {
  border-color: rgba(11, 92, 173, 0.2);
  color: var(--brand-strong);
  background: #ffffff;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
  font-family: var(--font-body);
  color: var(--ink);
  font-weight: 600;
}

.hero {
  position: relative;
  padding: clamp(2.2rem, 5vw, 5rem) 0 3.5rem;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(1.5rem, 3.2vw, 3.2rem);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--brand-strong);
  border: 1px solid #b8d3ef;
  background: #f2f8ff;
  padding: 0.44rem 0.76rem;
  border-radius: 999px;
  font-weight: 700;
}

.hero h1,
.section h2,
.h2 {
  font-family: var(--font-display);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: #0f172a;
}

.hero h1 {
  font-size: clamp(2.3rem, 5.4vw, 4.85rem);
  margin: 0.95rem 0 1.15rem;
  max-width: 14ch;
}

.lead {
  font-size: clamp(1.02rem, 1.35vw, 1.23rem);
  color: var(--muted);
  max-width: 62ch;
}

.hero-actions,
.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.82rem 1.25rem;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(120deg, var(--brand), #1d77cf);
  color: #f8fcff;
  box-shadow: 0 12px 26px rgba(11, 92, 173, 0.3);
}

.btn-secondary {
  border-color: #cad8e8;
  background: #ffffff;
  color: #1e293b;
}

.hero-panel {
  border-radius: var(--radius-lg);
  padding: clamp(1.2rem, 2.5vw, 2rem);
  background:
    radial-gradient(circle at 90% 10%, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0) 42%),
    linear-gradient(145deg, #0f3d75, #0a5ea3 58%, #0e7d95 100%);
  color: #eaf6ff;
  box-shadow: var(--shadow-card);
}

.hero-panel p {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.hero-checklist {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.7rem;
}

.hero-checklist li {
  background: rgba(3, 20, 40, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  padding: 0.72rem 0.8rem;
  font-size: 0.93rem;
}

.section {
  padding: clamp(3rem, 5.2vw, 5.3rem) 0;
}

.section.alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(231, 242, 255, 0.58));
  border-top: 1px solid rgba(202, 216, 232, 0.4);
  border-bottom: 1px solid rgba(202, 216, 232, 0.4);
}

.section h2,
.h2 {
  font-size: clamp(1.7rem, 3vw, 2.8rem);
  margin: 0;
}

.section-intro {
  margin-top: 0.92rem;
  color: var(--muted);
  max-width: 70ch;
  font-size: 1.05rem;
}

.grid {
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
}

.grid.cols-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.card,
.stat-card,
.mini-card,
.highlight,
.timeline-item,
.placeholder {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.card,
.mini-card {
  padding: 1.15rem;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.card h3,
.mini-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.card-copy,
.mini-card p {
  color: var(--muted);
}

.card-list {
  padding-left: 1.05rem;
  color: #253244;
}

.status-pill,
.chip {
  background: var(--brand-soft);
  border: 1px solid #c8dcf3;
  border-radius: 999px;
  padding: 0.22rem 0.7rem;
  font-size: 0.78rem;
  color: #0d4f93;
  font-weight: 700;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.stat-card {
  padding: 1.1rem;
  text-align: center;
}

.stat-value {
  margin: 0;
  font-family: var(--font-display);
  color: var(--brand-strong);
  font-size: 2.1rem;
}

.stat-label {
  margin: 0.32rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.highlight {
  margin-top: 1.3rem;
  padding: 1.2rem;
  background:
    radial-gradient(circle at 100% 0, rgba(11, 92, 173, 0.14), rgba(11, 92, 173, 0) 44%),
    var(--surface);
}

.timeline {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.timeline-item {
  padding: 0.82rem 1rem;
  margin-bottom: 0.7rem;
  position: relative;
}

.timeline-item::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  position: absolute;
  left: -5px;
  top: 50%;
  transform: translateY(-50%);
}

.placeholder {
  margin-top: 1rem;
  padding: 1.2rem;
}

.form-shell {
  margin-top: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  padding: 1.2rem;
}

.contact-form {
  display: grid;
  gap: 0.9rem;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.contact-form label {
  display: grid;
  gap: 0.38rem;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.94rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  border: 1px solid #c9d7e9;
  background: #ffffff;
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  font: inherit;
  color: var(--ink);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #4f8dd1;
  box-shadow: 0 0 0 3px rgba(79, 141, 209, 0.15);
}

.form-status {
  margin: 0;
  min-height: 1.2rem;
  font-weight: 600;
}

.form-status.is-ok {
  color: #0f766e;
}

.form-status.is-error {
  color: #b91c1c;
}

.site-footer {
  margin-top: 1.2rem;
  padding: 2.6rem 0;
  border-top: 1px solid #d4e0ee;
  background: linear-gradient(180deg, #edf4fc 0%, #e4edf8 100%);
}

.footer-grid {
  display: grid;
  gap: 1rem;
}

.footer-brand img {
  width: auto;
  height: clamp(22px, 2.3vw, 32px);
  max-width: 220px;
  object-fit: contain;
}

.footer-brand p {
  margin: 0.7rem 0 0;
  color: #344359;
  max-width: 64ch;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.footer-links a {
  color: #1d3557;
  font-weight: 600;
}

.copyright {
  color: #4c607c;
  margin: 0;
  font-size: 0.92rem;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

@media (max-width: 980px) {
  .hero-layout,
  .grid.cols-4,
  .grid.cols-3,
  .grid.cols-2 {
    grid-template-columns: 1fr;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: calc(var(--header-h) - 0.25rem);
    right: 1rem;
    flex-direction: column;
    align-items: stretch;
    background: var(--surface);
    border: 1px solid #cfdbeb;
    border-radius: var(--radius-sm);
    padding: 0.7rem;
    box-shadow: var(--shadow-card);
    min-width: 230px;
    gap: 0.35rem;
  }

  .nav-actions {
    gap: 0.45rem;
  }

  .lang-switch {
    padding: 0.18rem;
  }

  .lang-link {
    padding: 0.25rem 0.4rem;
    font-size: 0.7rem;
  }

  .site-nav.is-open {
    display: flex;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-nav-link {
    padding: 0.52rem 0.8rem;
    border-radius: 10px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    max-width: none;
  }

  .brand img {
    max-width: 170px;
    height: 24px;
  }
}