.mandatory-hero { position: relative; overflow: hidden; padding: 88px 0; background: #111a30; color: #fff; }
.mandatory-hero::after { content: ""; position: absolute; top: -180px; right: -90px; width: 540px; height: 540px; border: 90px solid rgba(0,77,249,.18); border-radius: 50%; }
.mandatory-hero .container { position: relative; z-index: 1; }
.mandatory-kicker { display: block; margin-bottom: 14px; color: #7aa7ff; font-family: Montserrat, sans-serif; font-size: 13px; font-weight: 900; letter-spacing: .16em; }
.mandatory-hero h1 { max-width: 720px; margin: 0 0 18px; font-size: clamp(38px, 6vw, 64px); line-height: 1.15; letter-spacing: -.055em; }
.mandatory-hero p { max-width: 650px; margin: 0; color: #c8d2e8; font-size: 17px; line-height: 1.8; }
.mandatory-section { padding: 82px 0; }
.mandatory-intro { display: grid; grid-template-columns: .85fr 1.15fr; gap: 70px; align-items: start; margin-bottom: 48px; }
.mandatory-intro h2 { margin: 0; color: #172b4d; font-size: clamp(28px, 4vw, 42px); line-height: 1.25; letter-spacing: -.045em; }
.mandatory-intro p { margin: 0; color: #5d6878; font-size: 15px; line-height: 1.9; }
.mandatory-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.mandatory-card { position: relative; display: block; min-height: 260px; padding: 32px; overflow: hidden; border: 1px solid #dfe6f1; border-radius: 20px; background: #fff; box-shadow: 0 12px 34px rgba(31,52,92,.06); transition: transform .2s ease, box-shadow .2s ease; }
.mandatory-card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px rgba(31,52,92,.12); }
.mandatory-card:first-child { grid-row: span 2; background: #1b315b; color: #fff; }
.mandatory-card-number { display: block; margin-bottom: 38px; color: #004df9; font-family: Montserrat, sans-serif; font-size: 13px; font-weight: 900; }
.mandatory-card:first-child .mandatory-card-number { color: #82aaff; }
.mandatory-card h3 { margin: 0 0 12px; color: #172b4d; font-size: 21px; letter-spacing: -.03em; }
.mandatory-card:first-child h3 { color: #fff; font-size: 27px; }
.mandatory-card p { margin: 0; color: #657188; font-size: 14px; line-height: 1.75; }
.mandatory-card:first-child p { color: #cbd6e9; }
.mandatory-card-tag { display: inline-block; margin-top: 22px; padding: 7px 11px; border-radius: 999px; background: #edf3ff; color: #315bc7; font-size: 12px; font-weight: 800; }
.mandatory-card:first-child .mandatory-card-tag { background: rgba(255,255,255,.1); color: #fff; }
.mandatory-card-link { display: block; margin-top: 24px; color: #004df9; font-size: 13px; font-weight: 900; }
.mandatory-card:first-child .mandatory-card-link { color: #fff; }
.mandatory-guide { margin-top: 72px; padding: 46px; border-radius: 24px; background: #f2f6fc; }
.mandatory-guide h2 { margin: 0 0 30px; color: #172b4d; font-size: 28px; }
.mandatory-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.mandatory-step strong { display: block; margin-bottom: 9px; color: #004df9; font-family: Montserrat, sans-serif; font-size: 12px; letter-spacing: .08em; }
.mandatory-step h3 { margin: 0 0 8px; color: #172b4d; font-size: 18px; }
.mandatory-step p { margin: 0; color: #69758a; font-size: 13px; line-height: 1.7; }
.mandatory-notice { margin-top: 24px; color: #778398; font-size: 12px; line-height: 1.7; }
.mandatory-cta { display: flex; justify-content: space-between; align-items: center; gap: 28px; margin-top: 28px; padding: 34px 38px; border-radius: 20px; background: #004df9; color: #fff; }
.mandatory-cta h2 { margin: 0 0 7px; font-size: 24px; }
.mandatory-cta p { margin: 0; color: #dbe6ff; font-size: 14px; }
.mandatory-cta a { flex-shrink: 0; padding: 13px 22px; border-radius: 999px; background: #fff; color: #004df9; font-size: 14px; font-weight: 900; }
.mandatory-detail-hero { padding: 72px 0; background: linear-gradient(135deg, #111a30, #203b6e); color: #fff; }
.mandatory-breadcrumb { display: inline-block; margin-bottom: 22px; color: #a9c3ff; font-size: 13px; font-weight: 700; }
.mandatory-detail-hero h1 { margin: 0 0 16px; font-size: clamp(34px, 5vw, 54px); letter-spacing: -.05em; }
.mandatory-detail-hero p { max-width: 720px; margin: 0; color: #d2dced; font-size: 16px; line-height: 1.8; }
.mandatory-detail-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr); gap: 28px; align-items: start; }
.mandatory-detail-block { padding: 36px; border: 1px solid #dfe6f1; border-radius: 20px; background: #fff; }
.mandatory-detail-block + .mandatory-detail-block { margin-top: 20px; }
.mandatory-detail-block h2 { margin: 0 0 20px; color: #172b4d; font-size: 25px; }
.mandatory-detail-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; counter-reset: detail; }
.mandatory-detail-list li { position: relative; padding: 16px 18px 16px 52px; border-radius: 12px; background: #f5f8fd; color: #536074; font-size: 14px; line-height: 1.7; counter-increment: detail; }
.mandatory-detail-list li::before { content: counter(detail, decimal-leading-zero); position: absolute; top: 16px; left: 18px; color: #004df9; font-family: Montserrat, sans-serif; font-size: 12px; font-weight: 900; }
.mandatory-detail-facts { position: sticky; top: 20px; display: grid; gap: 14px; }
.mandatory-detail-fact { padding: 22px; border-radius: 16px; background: #f2f6fc; }
.mandatory-detail-fact small { display: block; margin-bottom: 8px; color: #78849a; font-size: 11px; font-weight: 800; }
.mandatory-detail-fact strong { color: #172b4d; font-size: 15px; line-height: 1.6; }
.mandatory-detail-action { padding: 25px; border-radius: 16px; background: #004df9; color: #fff; }
.mandatory-detail-action h2 { margin: 0 0 8px; font-size: 21px; }
.mandatory-detail-action p { margin: 0 0 18px; color: #dce7ff; font-size: 13px; line-height: 1.7; }
.mandatory-detail-action a { display: block; padding: 12px; border-radius: 999px; background: #fff; color: #004df9; font-size: 13px; font-weight: 900; text-align: center; }
@media (max-width: 760px) {
  .mandatory-hero { padding: 64px 0; }
  .mandatory-intro { grid-template-columns: 1fr; gap: 20px; }
  .mandatory-grid { grid-template-columns: 1fr; }
  .mandatory-card:first-child { grid-row: auto; }
  .mandatory-guide { padding: 30px 24px; }
  .mandatory-steps { grid-template-columns: 1fr; }
  .mandatory-cta { align-items: flex-start; flex-direction: column; padding: 28px 24px; }
  .mandatory-detail-layout { grid-template-columns: 1fr; }
  .mandatory-detail-facts { position: static; }
}