:root {
  --white: #ffffff;
  --bg: #f8fbff;
  --text: #1b2430;
  --muted: #5f6c7b;
  --line: #e3e8ef;
  --blue: #2f6df6;
  --purple: #8d5cf7;
  --green: #18b89c;
  --shadow: 0 14px 34px rgba(20, 30, 50, 0.08);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
.container {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}
.section { padding: 88px 0; }
.section-soft { background: linear-gradient(180deg, #ffffff 0%, #f6faff 100%); }

.hero {
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(47, 109, 246, 0.12), transparent 30%),
    radial-gradient(circle at right center, rgba(141, 92, 247, 0.10), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
  display: flex;
  align-items: center;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 0;
}

.logo {
  font-size: 1.15rem;
  font-weight: 700;
}

.menu {
  display: flex;
  gap: 22px;
  align-items: center;
}

.menu a {
  color: var(--muted);
  font-weight: 600;
}

.menu-btn {
  display: none;
  border: 1px solid var(--line);
  background: var(--white);
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
  padding: 40px 0 72px;
}

.tag {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(47, 109, 246, 0.08);
  color: var(--blue);
  font-size: 0.9rem;
  font-weight: 700;
}

.hero-copy h1,
.section-title h2,
.intro-box h2,
.detail h2,
.quick-nav h2,
.footer-box h2 {
  margin: 16px 0 0;
  line-height: 1.08;
}

.hero-copy h1 {
  font-size: clamp(2.4rem, 4.8vw, 4.7rem);
}

.hero-copy p,
.intro-box p,
.card p,
.detail p,
.footer-box p,
.panel-card p,
.card ul {
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: var(--white);
  box-shadow: var(--shadow);
}

.btn-secondary {
  background: var(--white);
  border: 1px solid var(--line);
}

.hero-panel,
.cards,
.details,
.mini-cards {
  display: grid;
  gap: 20px;
}

.panel-card,
.card,
.detail,
.mini-card,
.quick-nav {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.panel-card {
  padding: 24px;
}

.panel-card span,
.card-top strong {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 14px;
  background: #f4f7fb;
  font-weight: 700;
}

.cards {
  grid-template-columns: repeat(3, 1fr);
  margin-top: 34px;
}

.card {
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.card::after {
  content: "";
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 999px;
  right: -35px;
  bottom: -35px;
  opacity: 0.12;
}
.card-blue::after { background: var(--blue); }
.card-purple::after { background: var(--purple); }
.card-green::after { background: var(--green); }

.card-top {
  display: flex;
  align-items: center;
  gap: 14px;
}

.card ul {
  padding-left: 20px;
}

.card a,
.footer-box a {
  font-weight: 700;
}

.intro-box,
.detail,
.quick-nav,
.footer-box {
  padding: 34px;
}

.section-title {
  display: grid;
  gap: 8px;
}

.mini-cards {
  grid-template-columns: repeat(2, 1fr);
  margin-top: 24px;
}

.mini-card {
  min-height: 130px;
  padding: 24px;
  display: flex;
  align-items: end;
}

.focus-box {
  margin-top: 18px;
  padding: 20px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(47,109,246,0.08), rgba(24,184,156,0.10));
  border: 1px solid rgba(47,109,246,0.16);
}

.quick-nav {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 24px;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.quick-links a {
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 700;
  background: var(--white);
}

.footer {
  padding: 26px 0 60px;
}

.footer-box {
  text-align: center;
}

@media (max-width: 980px) {
  .hero-grid,
  .cards,
  .quick-nav {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .section { padding: 72px 0; }
  .menu-btn { display: inline-block; }
  .menu {
    display: none;
    position: absolute;
    top: 78px;
    right: 16px;
    flex-direction: column;
    align-items: flex-start;
    width: 260px;
    padding: 16px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
  }
  .menu.open { display: flex; }
  .nav { position: relative; }
  .mini-cards { grid-template-columns: 1fr; }
  .panel-card, .card, .detail, .mini-card, .quick-nav, .intro-box, .footer-box { padding: 24px; }
}