:root {
  --blue: #159FDA; --blue-deep: #0E7FB4; --pink: #EC1E79; --pink-hot: #FF2E8E;
  --ink: #0A0F1C; --paper: #FFFFFF; --muted: #5B6577; --line: rgba(10,15,28,0.10);
  --grad: linear-gradient(120deg, var(--blue), var(--pink));
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--ink); background: var(--paper); line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--blue-deep); text-decoration: none; }
a:hover { text-decoration: underline; }
::selection { background: var(--pink); color: #fff; }

/* Header */
.l-header { background: var(--ink); position: sticky; top: 0; z-index: 10; }
.l-bar { max-width: 900px; margin: 0 auto; padding: 0 24px; height: 82px; display: flex; align-items: center; justify-content: space-between; }
.l-logo img { height: 62px; width: auto; }
.l-back { color: #fff; font-weight: 600; font-size: 15px; display: inline-flex; align-items: center; gap: 8px; }
.l-back:hover { color: var(--pink-hot); text-decoration: none; }

/* Hero */
.l-hero { background: var(--ink); color: #fff; padding: 54px 0 60px; position: relative; overflow: hidden; }
.l-hero::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(700px 320px at 82% -20%, rgba(236,30,121,0.38), transparent 60%),
              radial-gradient(700px 320px at 0% 10%, rgba(21,159,218,0.30), transparent 55%);
}
.l-wrap { max-width: 760px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 2; }
.l-hero .eyebrow { font-weight: 800; font-size: 13px; letter-spacing: .2em; text-transform: uppercase; color: var(--pink-hot); }
.l-hero h1 { font-family: 'Sora', sans-serif; font-weight: 800; font-size: clamp(32px, 5vw, 52px); letter-spacing: -0.02em; margin: 14px 0 0; }
.l-hero .updated { color: rgba(255,255,255,0.6); margin-top: 16px; font-size: 14px; }

/* Body */
main { padding: 54px 0 88px; }
main h2 { font-family: 'Sora', sans-serif; font-weight: 800; font-size: 22px; letter-spacing: -0.01em; margin: 40px 0 12px; color: var(--ink); }
main h2:first-child { margin-top: 0; }
main p { margin-bottom: 16px; color: #263042; font-size: 16.5px; }
main ul { margin: 0 0 16px; padding-left: 22px; }
main li { margin-bottom: 8px; color: #263042; font-size: 16.5px; }
main strong { color: var(--ink); }
.l-note { background: #F6F8FB; border: 1px solid var(--line); border-left: 4px solid var(--pink); border-radius: 12px; padding: 18px 20px; margin: 4px 0 20px; font-size: 15px; color: var(--muted); }
.l-note strong { color: var(--ink); }

/* Footer */
.l-foot { background: var(--ink); color: rgba(255,255,255,0.6); padding: 34px 0; font-size: 14px; }
.l-foot .l-wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.l-foot a { color: rgba(255,255,255,0.72); }
.l-foot a:hover { color: var(--pink-hot); text-decoration: none; }

@media (max-width: 600px) {
  .l-bar { height: 72px; }
  .l-logo img { height: 52px; }
  .l-foot .l-wrap { flex-direction: column; align-items: flex-start; }
}