:root {
  --ink: #0b172d;
  --muted: #60708a;
  --line: #dbe4ef;
  --paper: #ffffff;
  --wash: #f4f8fd;
  --blue: #1769ff;
  --cyan: #16d9cf;
  --navy: #08172f;
  --success: #0b8c71;
  color-scheme: light;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 90% -10%, rgba(22, 217, 207, .18), transparent 32rem),
    radial-gradient(circle at -5% 10%, rgba(23, 105, 255, .16), transparent 28rem),
    var(--wash);
  line-height: 1.75;
}

a { color: var(--blue); text-underline-offset: 3px; }
.shell { width: min(1120px, calc(100% - 32px)); margin: 0 auto; padding-bottom: 56px; }
.compact-shell { min-height: 100vh; display: grid; place-items: center; padding: 32px 0; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px max(18px, calc((100vw - 1120px) / 2));
  border-bottom: 1px solid rgba(219, 228, 239, .85);
  background: rgba(255, 255, 255, .9);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; letter-spacing: .02em; }
.hero .brand { color: #fff; }
.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  font-size: 24px;
  font-style: italic;
  background: var(--navy);
  border: 3px solid transparent;
  background-image: linear-gradient(var(--navy), var(--navy)), linear-gradient(135deg, var(--blue), var(--cyan));
  background-origin: border-box;
  background-clip: padding-box, border-box;
}
nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 16px; }
nav a { color: #34445e; font-size: 14px; text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--blue); }
.hero {
  margin: 40px 0 24px;
  padding: clamp(34px, 6vw, 72px);
  overflow: hidden;
  position: relative;
  color: #fff;
  border-radius: 32px;
  background: linear-gradient(135deg, #07172e 0%, #102e67 58%, #0e8ca4 135%);
  box-shadow: 0 28px 70px rgba(19, 53, 102, .18);
}
.hero::after {
  content: "";
  position: absolute;
  right: -130px;
  top: -160px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(25, 224, 209, .35), transparent 68%);
}
.compact-hero { width: min(820px, 100%); margin: 0; }
.eyebrow { margin: 24px 0 8px; color: #7ff5e8; font-size: 14px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
h1 { max-width: 820px; margin: 0; font-size: clamp(34px, 6vw, 64px); line-height: 1.12; letter-spacing: -.035em; }
.lead { max-width: 780px; margin: 20px 0 0; color: #dce9ff; font-size: clamp(16px, 2vw, 20px); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 22px; border-radius: 14px; font-weight: 700; text-decoration: none; }
.button.primary { color: #08172f; background: linear-gradient(135deg, #fff, #b9fff8); }
.button.secondary { color: #fff; border: 1px solid rgba(255, 255, 255, .3); background: rgba(255, 255, 255, .08); }
.trust-row, .feature-grid { display: grid; gap: 16px; }
.trust-row { grid-template-columns: repeat(3, 1fr); margin: 24px 0; }
.trust-card, .feature-card, .content-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 14px 40px rgba(32, 60, 100, .07);
}
.trust-card { padding: 22px; }
.trust-card strong { display: block; margin-bottom: 6px; font-size: 18px; }
.trust-card span { color: var(--muted); font-size: 14px; }
.trust-card .check { color: var(--success); }
.section-title { margin: 44px 0 18px; font-size: 30px; line-height: 1.25; }
.feature-grid { grid-template-columns: repeat(3, 1fr); }
.feature-card { padding: 24px; }
.feature-card .number { color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .1em; }
.feature-card h2 { margin: 9px 0 8px; font-size: 20px; }
.feature-card p { margin: 0; color: var(--muted); font-size: 15px; }
.content-card { margin: 28px 0; padding: clamp(24px, 4vw, 48px); }
.content-card h1 { color: var(--ink); font-size: clamp(32px, 5vw, 50px); }
.content-card h2 { margin: 38px 0 10px; padding-top: 4px; font-size: 23px; line-height: 1.4; }
.content-card h3 { margin: 26px 0 8px; font-size: 18px; }
.content-card p, .content-card li { color: #35445d; }
.content-card li + li { margin-top: 8px; }
.meta { margin: 10px 0 24px; color: var(--muted); font-size: 14px; }
.notice {
  margin: 24px 0;
  padding: 20px 22px;
  border: 1px solid #b8eae2;
  border-radius: 18px;
  color: #14564d;
  background: #edfffb;
}
.link-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 20px; }
.link-card { padding: 20px; border: 1px solid var(--line); border-radius: 18px; color: var(--ink); background: #fff; text-decoration: none; }
.link-card strong { display: block; margin-bottom: 6px; }
.link-card span { color: var(--muted); font-size: 14px; }
.footer { margin-top: 38px; padding: 26px 0 10px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); }
.footer strong { color: var(--ink); }
.plain-email { color: var(--ink); font-weight: 700; word-break: break-all; }

@media (max-width: 760px) {
  .site-header { align-items: flex-start; padding: 12px 16px; }
  .site-header .brand span:last-child { display: none; }
  nav { gap: 10px 14px; }
  nav a { font-size: 13px; }
  .shell { width: min(100% - 20px, 1120px); }
  .hero { margin-top: 18px; border-radius: 24px; }
  .trust-row, .feature-grid, .link-cards { grid-template-columns: 1fr; }
  .content-card { border-radius: 20px; }
}