:root {
  --ink: #225575;
  --ink-deep: #102f46;
  --sky: #67afe0;
  --sky-soft: #eaf4fa;
  --paper: #f5f8fa;
  --white: #ffffff;
  --muted: #6f828e;
  --mustard: #d4a62a;
  --line: #d6e2e8;
  --shadow: 0 24px 70px rgba(16, 47, 70, 0.12);
  --radius-xl: 36px;
  --radius-lg: 24px;
  --radius-md: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink-deep);
  background: var(--paper);
  font-family: "Avenir Next", Avenir, "Segoe UI", system-ui, sans-serif;
  line-height: 1.55;
}
a { color: inherit; }
img { display: block; max-width: 100%; }

.shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(214, 226, 232, 0.85);
  background: rgba(245, 248, 250, 0.9);
  backdrop-filter: blur(18px);
}
.nav { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 14px; text-decoration: none; }
.brand img { width: 52px; height: 52px; border-radius: 15px; }
.brand span { color: var(--ink); font-weight: 800; letter-spacing: 0.3em; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--muted); font-weight: 700; text-decoration: none; }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--ink); }

.hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 72px;
  background:
    radial-gradient(circle at 84% 12%, rgba(103, 175, 224, 0.34), transparent 31%),
    linear-gradient(135deg, #f9fcfe 0%, #e9f5fb 52%, #d3eaf7 100%);
}
.hero::before {
  content: "";
  position: absolute;
  left: -160px;
  bottom: -270px;
  width: 540px;
  height: 540px;
  border: 1px solid rgba(103, 175, 224, 0.28);
  border-radius: 50%;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; align-items: center; gap: 70px; }
.eyebrow {
  margin: 0 0 18px;
  color: var(--sky);
  font-size: 0.84rem;
  font-weight: 900;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}
h1, h2, h3 { color: var(--ink); line-height: 1.05; }
h1 { max-width: 720px; margin: 0; font-size: clamp(3rem, 7vw, 6.4rem); letter-spacing: -0.055em; }
.hero-copy { max-width: 650px; margin: 26px 0 0; color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.35rem); }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button {
  display: inline-flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  padding: 0 25px;
  border: 2px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  font-weight: 800;
  text-decoration: none;
}
.button.secondary { background: transparent; color: var(--ink); }
.button:hover, .button:focus-visible { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(34, 85, 117, 0.18); }
.hero-visual { min-height: 650px; position: relative; }
.phone {
  position: absolute;
  width: min(310px, 63%);
  overflow: hidden;
  border: 10px solid var(--ink-deep);
  border-radius: 42px;
  background: #eef7fc;
  box-shadow: var(--shadow);
}
.phone:first-child { top: 28px; left: 4%; transform: rotate(-5deg); }
.phone:last-child { right: 2%; bottom: 12px; transform: rotate(4deg); }

.section { padding: 92px 0; }
.section.white { background: var(--white); }
.section-heading { max-width: 760px; margin-bottom: 42px; }
.section-heading h2 { margin: 0 0 18px; font-size: clamp(2.2rem, 5vw, 4.2rem); letter-spacing: -0.045em; }
.section-heading p { margin: 0; color: var(--muted); font-size: 1.14rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.card {
  min-height: 260px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
}
.card-number { color: var(--sky); font-size: 0.84rem; font-weight: 900; letter-spacing: 0.18em; }
.card h3 { margin: 64px 0 14px; font-size: 1.55rem; }
.card p { margin: 0; color: var(--muted); }
.promise {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: center;
  padding: 58px;
  border-radius: var(--radius-xl);
  background: var(--ink);
  color: var(--white);
}
.promise h2 { margin: 0 0 20px; color: var(--white); font-size: clamp(2.2rem, 5vw, 4rem); }
.promise p { margin: 0; color: #d8e7ef; font-size: 1.1rem; }
.promise-list { display: grid; gap: 15px; }
.promise-item { padding: 20px 22px; border: 1px solid rgba(255,255,255,0.18); border-radius: var(--radius-md); background: rgba(255,255,255,0.07); font-weight: 700; }
.cta { padding: 78px 0; text-align: center; }
.cta h2 { max-width: 820px; margin: 0 auto 18px; font-size: clamp(2.3rem, 5vw, 4.6rem); }
.cta p { max-width: 680px; margin: 0 auto; color: var(--muted); font-size: 1.15rem; }

.page-hero { padding: 76px 0 52px; background: linear-gradient(145deg, #f9fcfe, #e0f0f9); }
.page-hero h1 { max-width: 850px; font-size: clamp(2.8rem, 7vw, 5.5rem); }
.page-hero p { max-width: 760px; color: var(--muted); font-size: 1.18rem; }
.content { padding: 64px 0 100px; }
.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 54px; align-items: start; }
.prose { max-width: 780px; }
.prose h2 { margin: 46px 0 14px; font-size: 1.7rem; letter-spacing: -0.02em; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { color: #536b79; }
.prose li + li { margin-top: 8px; }
.aside { position: sticky; top: 112px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white); }
.aside h2 { margin: 0 0 12px; font-size: 1.4rem; }
.aside p { color: var(--muted); }
.notice { margin: 0 0 30px; padding: 20px 22px; border: 2px solid var(--mustard); border-radius: var(--radius-md); background: #fffaf0; color: #725916; font-weight: 700; }
.faq { display: grid; gap: 14px; }
.faq details { padding: 20px 22px; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--white); }
.faq summary { cursor: pointer; color: var(--ink); font-weight: 800; }
.faq p { margin-bottom: 0; color: var(--muted); }

.site-footer { padding: 48px 0; border-top: 1px solid var(--line); background: var(--white); }
.footer-grid { display: flex; justify-content: space-between; gap: 36px; align-items: flex-start; }
.footer-copy { max-width: 480px; color: var(--muted); }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-links a { color: var(--ink); font-weight: 700; }

@media (max-width: 880px) {
  .nav-links a:not(.support-link) { display: none; }
  .hero { padding-top: 64px; }
  .hero-grid, .promise, .content-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 570px; }
  .feature-grid { grid-template-columns: 1fr; }
  .card { min-height: auto; }
  .card h3 { margin-top: 30px; }
  .promise { padding: 34px; }
  .aside { position: static; }
}

@media (max-width: 560px) {
  .shell { width: min(100% - 28px, 1180px); }
  .nav { min-height: 72px; }
  .brand img { width: 44px; height: 44px; }
  .brand span { font-size: 0.9rem; letter-spacing: 0.22em; }
  .nav-links { gap: 12px; }
  .hero { padding-bottom: 38px; }
  .hero-visual { min-height: 480px; }
  .phone { width: 60%; border-width: 7px; border-radius: 30px; }
  .section { padding: 68px 0; }
  .page-hero { padding: 56px 0 38px; }
  .content { padding-top: 44px; }
  .footer-grid { flex-direction: column; }
}