/* 04 · 纵贯铁路：从最北到最南 */
.rail-intro { border-left: 2px solid var(--red); padding: 2px 0 2px 14px; margin: 0 0 20px; font-size: 13px; line-height: 1.9; color: var(--ink-2); }
.rail-intro b { color: var(--ink); }
.rail-alert { border: 1px solid var(--line); background: var(--paper-2); padding: 12px 14px; font-size: 12px; line-height: 1.8; color: var(--ink-2); margin: 0 0 24px; }
.rail-endpoints { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 0 0 24px; }
.rail-endpoint { border: 1px solid var(--line); background: var(--paper); padding: 13px 14px; }
.rail-endpoint-top { display: flex; justify-content: space-between; gap: 8px; font-size: 9px; letter-spacing: .08em; color: var(--ink-3); }
.rail-endpoint-top em { color: var(--red); font-style: normal; border: 1px solid #d8b7a8; padding: 1px 4px; white-space: nowrap; }
.rail-endpoint h3 { font-family: var(--serif); font-size: 22px; margin: 10px 0 2px; font-weight: 600; }
.rail-place { margin: 0 0 8px; color: var(--red); font-size: 11px; }
.rail-endpoint p:last-child { margin: 0; font-size: 11.5px; line-height: 1.8; color: var(--ink-2); }
.rail-stage { position: relative; border-top: 1px solid var(--ink); padding: 22px 0 26px 24px; }
.rail-stage::before { content: ""; position: absolute; left: 0; top: 31px; bottom: 26px; width: 1px; background: var(--line); }
.rail-stage::after { content: ""; position: absolute; left: -4px; top: 30px; width: 9px; height: 9px; border-radius: 50%; background: var(--red); }
.rail-stage-head h2 { font-family: var(--serif); font-size: 25px; margin: 4px 0 6px; }
.rail-kicker { margin: 0; font-size: 9px; letter-spacing: .16em; color: var(--red); }
.rail-stage-head > p:last-child { margin: 0 0 14px; max-width: 850px; font-size: 12.5px; line-height: 1.85; color: var(--ink-2); }
.rail-stop-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.rail-stop { border: 1px solid var(--line-soft); background: var(--paper-2); padding: 11px 12px; }
.rail-stop-top { display: flex; justify-content: space-between; gap: 8px; font-size: 9px; color: var(--ink-3); }
.rail-tags { display: flex; gap: 3px; flex-wrap: wrap; justify-content: flex-end; }
.rail-tags b { font-weight: 400; border: 1px solid var(--line); padding: 1px 4px; color: var(--ink-3); }
.rail-stop h3 { font-family: var(--serif); font-size: 17px; line-height: 1.4; margin: 8px 0 4px; }
.rail-stop p { margin: 0; font-size: 11.5px; line-height: 1.7; color: var(--ink-2); }
.rail-modes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); margin: 4px 0 18px; }
.rail-modes div { padding: 12px 12px; border-right: 1px solid var(--line); }
.rail-modes div:last-child { border-right: 0; }
.rail-modes b { display: block; font-family: var(--serif); font-size: 17px; margin-bottom: 3px; }
.rail-modes span { display: block; font-size: 10px; line-height: 1.6; color: var(--ink-3); }
@media (max-width: 820px) {
  .rail-endpoints { grid-template-columns: 1fr 1fr; }
  .rail-stop-grid { grid-template-columns: 1fr; }
  .rail-modes { grid-template-columns: 1fr 1fr; }
  .rail-modes div:nth-child(2) { border-right: 0; }
  .rail-modes div:nth-child(1), .rail-modes div:nth-child(2) { border-bottom: 1px solid var(--line); }
}
@media (max-width: 520px) {
  .rail-endpoints { grid-template-columns: 1fr; }
  .rail-stage { padding-left: 18px; }
  .rail-modes { grid-template-columns: 1fr; }
  .rail-modes div { border-right: 0; border-bottom: 1px solid var(--line); }
  .rail-modes div:last-child { border-bottom: 0; }
}