.rules-body { padding-bottom: 0; background: #f1f5f2; }
.rules-hero { padding-bottom: 34px; }
.rules-hero__nav {
  display: flex; align-items: center; justify-content: flex-end; gap: 18px;
}
.rules-back {
  flex: 0 0 auto; color: #ffe28c; font-size: 14px; font-weight: 800;
  text-decoration: underline; text-underline-offset: 4px;
  text-shadow: 0 2px 8px rgba(3, 29, 22, .72);
}
.rules-main { width: min(980px, 100%); padding: 22px 16px 56px; }

.rules-test-notice, .rules-purpose, .rules-section {
  border: 1px solid var(--line); border-radius: 16px; background: white;
  box-shadow: 0 5px 22px rgba(40, 22, 62, .06);
}
.rules-test-notice {
  margin-bottom: 18px; padding: 14px 16px; border-color: #e7b86f;
  color: #713500; background: #fff2d8;
}
.rules-test-notice p { margin: 0; line-height: 1.65; }

.rules-announcement {
  margin-bottom: 16px; padding: 24px; border-radius: 16px;
  color: white; background: linear-gradient(135deg, #174f40, #286f58);
  box-shadow: 0 8px 28px rgba(15, 68, 53, .16); text-align: center;
}
.rules-announcement h2 {
  margin: 0; font-size: clamp(24px, 5vw, 36px); line-height: 1.25;
}
.rules-announcement h2:first-child { color: #ffe28c; }
[data-lang="zh"] .rules-announcement h2:first-child {
  font-size: clamp(32px, 6vw, 46px);
}
.rules-announcement h2 + h2 { margin-top: 8px; }

.rules-purpose, .rules-section { margin-bottom: 16px; padding: 22px; }
.rules-purpose h2, .rules-section h2 {
  margin: 0 0 12px; color: var(--purple); font-size: 24px;
}
.rules-purpose p, .rules-section > p {
  margin: 9px 0; color: var(--muted); line-height: 1.78;
}
.rules-section a { color: var(--purple-2); font-weight: 800; }

.phase-card {
  display: grid; grid-template-columns: 76px 1fr; gap: 18px;
  margin-top: 14px; padding: 18px; border: 1px solid var(--line);
  border-radius: 14px; background: #f7faf8;
}
.phase-card__number {
  width: 64px; height: 64px; display: grid; place-items: center; border-radius: 50%;
  color: white; background: var(--purple-2); font-size: 24px; font-weight: 900;
}
.phase-card__eyebrow {
  margin: 0 0 5px; color: var(--purple-2); font-size: 13px;
  font-weight: 900; text-transform: uppercase;
}
.phase-card h3 { margin: 0 0 8px; color: var(--purple); font-size: 20px; }
.phase-card__date { margin: 0; color: #31473e; font-size: 17px; font-weight: 800; line-height: 1.55; }

.rules-steps, .rules-prize ol { margin: 0; padding-left: 24px; }
.rules-steps > li, .rules-prize li { margin: 14px 0; padding-left: 4px; line-height: 1.72; }
.rules-steps ol { margin-top: 8px; padding-left: 22px; }
.rules-steps ol li { margin: 7px 0; }
.rules-stage-detail {
  margin: 9px 0 0; padding: 11px 14px; border-left: 4px solid var(--purple-2);
  border-radius: 0 10px 10px 0; background: #f4f8f5;
}
.rules-stage-detail p { margin: 5px 0; line-height: 1.65; }
.rules-platform-links {
  display: flex; flex-wrap: wrap; gap: 9px; margin-top: 9px;
}
.rules-platform-links a {
  display: inline-flex; align-items: center; min-height: 38px; padding: 8px 13px;
  border: 1px solid rgba(165, 112, 19, .35); border-radius: 999px;
  color: #713500; background: #fff9ec; text-decoration: none;
}
.rules-platform-links a:hover, .rules-platform-links a:focus-visible {
  border-color: var(--purple-2); background: #fff0c9; text-decoration: underline;
  text-underline-offset: 3px;
}
.rules-qr-entry {
  display: flex; align-items: center; gap: 16px; width: min(540px, 100%);
  margin: 20px auto 0; padding: 14px; border: 1px solid var(--line);
  border-radius: 16px; color: var(--purple); background: #f7faf8;
  text-decoration: none;
}
.rules-qr-entry img {
  width: 112px; height: 116px; flex: 0 0 auto; border-radius: 8px;
  background: white; object-fit: contain;
}
.rules-qr-entry span { display: grid; gap: 5px; color: var(--muted); line-height: 1.5; }
.rules-qr-entry strong { color: var(--purple); font-size: 18px; }
.rules-qr-entry:hover, .rules-qr-entry:focus-visible {
  border-color: var(--purple-2); box-shadow: 0 6px 20px rgba(15, 68, 53, .12);
}
.rules-prize { border-color: rgba(154, 104, 21, .34); background: #fffaf0; }
.rules-prize li strong { color: #713500; }
.rules-organizer-note {
  margin: 20px 0 0; padding: 14px 16px; border-radius: 12px;
  color: #4c5f57; background: #e7efea; font-weight: 800; text-align: center;
}
.rules-cta {
  display: block; width: min(420px, 100%); margin: 26px auto 0; padding: 14px 20px;
  border-radius: 12px; color: white; background: var(--purple); font-weight: 900;
  text-align: center; text-decoration: none;
}

@media (max-width: 560px) {
  .rules-hero { padding-bottom: 18px; }
  .rules-hero__nav { justify-content: space-between; gap: 8px; }
  .rules-back { max-width: 42%; font-size: 11px; text-align: right; }
  .rules-announcement, .rules-purpose, .rules-section { padding: 18px; }
  .phase-card { grid-template-columns: 1fr; gap: 10px; }
  .phase-card__number { width: 50px; height: 50px; font-size: 19px; }
  .phase-card h3 { font-size: 18px; }
  .phase-card__date { font-size: 15px; }
  .rules-platform-links { display: grid; grid-template-columns: 1fr 1fr; }
  .rules-platform-links a { justify-content: center; text-align: center; }
  .rules-qr-entry { gap: 12px; padding: 12px; }
  .rules-qr-entry img { width: 92px; height: 96px; }
  .rules-qr-entry strong { font-size: 16px; }
}