:root {
  --bg: #f4f8ff;
  --surface: #ffffff;
  --surface-2: #f0f6ff;
  --line: #d6e4ff;
  --text: #0f172a;
  --muted: #4b5563;
  --primary: #1d4ed8;
  --secondary: #0ea5e9;
  --accent: #14b8a6;
  --shadow: 0 12px 40px rgba(29, 78, 216, 0.14);
  --radius: 14px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Noto Sans SC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 10%, rgba(14, 165, 233, 0.15), transparent 32%),
    radial-gradient(circle at 92% 4%, rgba(20, 184, 166, 0.12), transparent 28%),
    linear-gradient(180deg, #f7faff 0%, var(--bg) 30%, #eef4ff 100%);
  line-height: 1.65;
  min-height: 100vh;
}

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

.container {
  width: min(var(--max-width), calc(100% - 2.4rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(214, 228, 255, 0.8);
}

.header-wrap {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand img {
  width: 156px;
  height: auto;
}

.site-nav {
  display: flex;
  gap: 1.1rem;
  align-items: center;
}

.site-nav a {
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.12);
}

.lang-switch {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--primary);
  font-weight: 700;
  border-radius: 999px;
  padding: 0.5rem 0.95rem;
  cursor: pointer;
}

.hero {
  padding: 5.5rem 0 4.2rem;
}

.hero-card {
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  padding: clamp(1.6rem, 3.5vw, 3.2rem);
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.96), rgba(248, 252, 255, 0.94)),
    radial-gradient(circle at 85% 12%, rgba(14, 165, 233, 0.14), transparent 35%);
  box-shadow: var(--shadow);
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: #dbeafe;
  color: #1e3a8a;
  font-weight: 700;
  font-size: 0.86rem;
  padding: 0.35rem 0.76rem;
}

.hero h1 {
  margin: 1rem 0;
  font-size: clamp(1.9rem, 4.5vw, 3.25rem);
  line-height: 1.15;
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 72ch;
}

.grid {
  display: grid;
  gap: 1.1rem;
}

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

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

.section {
  padding: 1.2rem 0 4.2rem;
}

.section h2 {
  font-size: clamp(1.45rem, 2.2vw, 2rem);
  margin: 0 0 0.7rem;
}

.section-intro {
  margin: 0 0 1.6rem;
  color: var(--muted);
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.card h3 {
  margin: 0.8rem 0 0.5rem;
  font-size: 1.15rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.card img {
  width: 36px;
  height: 36px;
}

.kpi {
  background: linear-gradient(145deg, #1d4ed8, #0284c7);
  color: #f8fbff;
  border-radius: var(--radius);
  padding: 1.2rem;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.kpi strong {
  display: block;
  font-size: 1.7rem;
  margin-bottom: 0.2rem;
}

.stack-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.stack-list li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.75rem;
  background: var(--surface-2);
  font-weight: 600;
  color: #1e3a8a;
  font-size: 0.92rem;
}

.contact-list {
  display: grid;
  gap: 0.85rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem;
  border-radius: 12px;
  background: var(--surface-2);
  border: 1px solid var(--line);
}

.contact-item img {
  width: 25px;
  height: 25px;
}

.page-head {
  padding: 3.6rem 0 1.6rem;
}

.page-head h1 {
  margin: 0;
  font-size: clamp(1.75rem, 3.2vw, 2.7rem);
}

.page-head p {
  margin: 0.8rem 0 0;
  color: var(--muted);
  max-width: 78ch;
}

.policy article {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem;
  margin-bottom: 1rem;
}

.policy h2 {
  margin: 0;
  font-size: 1.2rem;
}

.policy p,
.policy li {
  color: var(--muted);
}

.policy ul {
  margin: 0.75rem 0 0;
  padding-left: 1.2rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.2rem 0 2rem;
  background: rgba(255, 255, 255, 0.85);
  margin-top: 2rem;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 0.85rem;
}

.footer-links a {
  color: var(--primary);
  font-weight: 600;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: riseUp 0.56s ease forwards;
}

.reveal.delay-1 { animation-delay: 0.08s; }
.reveal.delay-2 { animation-delay: 0.16s; }
.reveal.delay-3 { animation-delay: 0.24s; }

@keyframes riseUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .header-wrap {
    height: auto;
    padding: 0.85rem 0;
    flex-wrap: wrap;
  }

  .site-nav {
    width: 100%;
    order: 3;
    overflow-x: auto;
    padding-bottom: 0.2rem;
  }

  .hero {
    padding-top: 3.4rem;
  }
}