body[data-page="home"] .system-section {
  grid-template-columns: minmax(0, .83fr) minmax(0, 1.17fr);
  gap: clamp(36px, 5vw, 86px);
  align-items: center;
  min-height: 710px;
}

body[data-page="home"] .system-copy {
  position: relative;
  isolation: isolate;
  z-index: 1;
}

body[data-page="home"] .system-copy::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -70px -26px -70px -60px;
  pointer-events: none;
  background: radial-gradient(ellipse at 35% 48%, rgba(255,255,255,.98) 0 42%, rgba(255,255,255,.88) 65%, transparent 100%);
}

body[data-page="home"] .system-copy h2 {
  max-width: 620px;
  font-size: clamp(2.75rem, 3.75vw, 4.65rem);
  line-height: 1.04;
  letter-spacing: -.055em;
}

body[data-page="home"] .system-copy p:not(.eyebrow) {
  max-width: 490px;
  margin-top: clamp(22px, 3vw, 36px);
  color: #53627b;
  line-height: 1.65;
}

body[data-page="home"] .system-map {
  --system-progress: 0;
  position: relative;
  min-width: 0;
  padding: clamp(28px, 3vw, 46px);
  color: #10203d;
  border: 1px solid rgba(112, 146, 192, .3);
  border-radius: 3px;
  background: linear-gradient(155deg, rgba(255,255,255,.96), rgba(246,249,254,.93) 72%, rgba(233,242,254,.86));
  box-shadow: 0 26px 72px rgba(37, 73, 123, .075), inset 0 1px rgba(255,255,255,.9);
}

body[data-page="home"] .system-map::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 30%, rgba(151,190,240,.075) 48%, transparent 66%);
}

.system-map-heading,
.system-map-detail-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 18px;
}

.system-map-heading {
  color: #456b9d;
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .18em;
}

.system-map-count {
  color: #7a8da7;
  white-space: nowrap;
}

.system-map-intro {
  max-width: 400px;
  margin: 16px 0 30px;
  font-size: clamp(1.45rem, 2.1vw, 2.3rem);
  font-weight: 650;
  line-height: 1.16;
  letter-spacing: -.035em;
}

.system-map-journey {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: start;
  gap: 2px;
  margin: 0 -7px;
}

.system-map-line {
  position: absolute;
  top: 30px;
  left: 10%;
  right: 10%;
  height: 1px;
  background: #c8d8ef;
  pointer-events: none;
}

.system-map-fill {
  display: block;
  width: calc(var(--system-progress) * 100%);
  height: 2px;
  margin-top: -1px;
  background: linear-gradient(90deg, #9cc2f1, #356dad);
  transition: width .55s cubic-bezier(.22,1,.36,1);
}

.system-map-signal {
  position: absolute;
  top: -4px;
  left: calc(var(--system-progress) * 100%);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  transform: translateX(-50%);
  background: #3876bd;
  box-shadow: 0 0 0 5px rgba(62, 119, 185, .12), 0 0 18px rgba(70, 132, 204, .45);
  transition: left .55s cubic-bezier(.22,1,.36,1);
}

.system-map-step {
  appearance: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 11px;
  min-width: 0;
  padding: 0 2px 8px;
  border: 0;
  background: transparent;
  color: #61718a;
  font: inherit;
  cursor: pointer;
}

.system-map-node {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 60px;
  height: 60px;
  border: 1px solid #c4d3e9;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 8px 19px rgba(47, 91, 146, .055);
  transition: transform .35s ease, border-color .35s ease, background .35s ease, box-shadow .35s ease;
}

.system-map-node svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.system-map-step-name {
  font-size: clamp(.62rem, .8vw, .77rem);
  font-weight: 700;
  letter-spacing: -.01em;
  text-align: center;
}

.system-map-step:hover .system-map-node,
.system-map-step:focus-visible .system-map-node,
.system-map-step.is-active .system-map-node {
  transform: translateY(-4px);
  border-color: #4c83c3;
  background: #eef5ff;
  box-shadow: 0 8px 22px rgba(45, 104, 176, .14), 0 0 0 5px rgba(76,131,195,.08);
}

.system-map-step.is-active { color: #123d70; }
.system-map-step:focus-visible { outline: 2px solid #3369ab; outline-offset: 7px; border-radius: 3px; }

.system-map-core {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: max-content;
  max-width: 100%;
  margin: 28px auto 24px;
  padding: 10px 16px;
  border: 1px solid #b7cde9;
  border-radius: 999px;
  background: rgba(236,245,255,.76);
  box-shadow: 0 8px 24px rgba(47, 106, 169, .075);
}

.system-map-core-line {
  position: absolute;
  bottom: 100%;
  left: 50%;
  width: 1px;
  height: 25px;
  background: #b7cde9;
}

.system-map-core-symbol {
  color: #4078ba;
  font-size: 1.1rem;
  line-height: 1;
}

.system-map-core strong {
  font-size: .7rem;
  letter-spacing: .14em;
}

.system-map-core small {
  padding-left: 10px;
  border-left: 1px solid #b8cce8;
  color: #4f719b;
  font-size: .55rem;
  font-weight: 700;
  letter-spacing: .1em;
}

.system-map-detail {
  position: relative;
  min-height: 188px;
  padding: clamp(18px, 2.3vw, 26px);
  border-top: 1px solid #9dbade;
  border-bottom: 1px solid #d1def0;
  background: linear-gradient(120deg, rgba(228,239,253,.64), rgba(255,255,255,.75));
}

.system-map-detail-index {
  color: #3d6da5;
  font-size: .65rem;
  font-weight: 800;
  letter-spacing: .14em;
}

.system-map-detail-title {
  max-width: 65%;
  color: #102544;
  font-size: clamp(1rem, 1.28vw, 1.35rem);
  line-height: 1.2;
  text-align: right;
}

.system-map-detail-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.system-map-detail-grid p {
  min-width: 0;
  margin: 0;
  padding-left: 12px;
  border-left: 1px solid #b9cce5;
}

.system-map-detail-grid span {
  display: block;
  margin-bottom: 9px;
  color: #5b78a1;
  font-size: .58rem;
  font-weight: 800;
  letter-spacing: .13em;
}

.system-map-detail-grid strong {
  color: #283b57;
  font-size: clamp(.75rem, .9vw, .9rem);
  font-weight: 550;
  line-height: 1.48;
}

.system-map-caption {
  margin: 16px 0 0;
  color: #74849a;
  font-size: .72rem;
}

@media (max-width: 1050px) {
  body[data-page="home"] .system-section { grid-template-columns: 1fr; min-height: 0; }
  body[data-page="home"] .system-copy h2 { max-width: 740px; }
  body[data-page="home"] .system-map { max-width: 760px; }
}

@media (max-width: 600px) {
  body[data-page="home"] .system-section { gap: 30px; }
  body[data-page="home"] .system-copy::before { inset: -25px; }
  body[data-page="home"] .system-copy h2 { font-size: clamp(2.65rem, 10vw, 3.8rem); }
  body[data-page="home"] .system-map { padding: 23px 19px; }
  .system-map-intro { margin-bottom: 22px; font-size: 1.5rem; }
  .system-map-journey { grid-template-columns: 1fr; gap: 5px; margin: 0; }
  .system-map-line { top: 24px; bottom: 24px; left: 24px; right: auto; width: 1px; height: auto; }
  .system-map-fill { width: 2px; height: calc(var(--system-progress) * 100%); margin: 0 0 0 -1px; transition: height .5s ease; }
  .system-map-signal { top: calc(var(--system-progress) * 100%); left: -4px; transform: translateY(-50%); transition: top .5s ease; }
  .system-map-step { flex-direction: row; gap: 16px; width: 100%; padding: 3px 0; text-align: left; }
  .system-map-node { flex: 0 0 auto; width: 49px; height: 49px; }
  .system-map-node svg { width: 20px; height: 20px; }
  .system-map-step-name { font-size: .88rem; text-align: left; }
  .system-map-core { margin: 19px 0 20px; }
  .system-map-core-line { display: none; }
  .system-map-detail { min-height: 0; }
  .system-map-detail-head { display: block; }
  .system-map-detail-title { display: block; max-width: none; margin-top: 7px; text-align: left; font-size: 1.12rem; }
  .system-map-detail-grid { grid-template-columns: 1fr; gap: 15px; margin-top: 22px; }
  .system-map-detail-grid span { margin-bottom: 4px; }
  .system-map-detail-grid strong { font-size: .86rem; }
}

@media (prefers-reduced-motion: reduce) {
  .system-map-fill, .system-map-signal, .system-map-node { transition: none; }
}