/* 比赛页：主站黑色磨砂毛玻璃风（3块同尺寸） */
body.page-challenge {
  margin: 0;
  color: #ffffff;
  background: #000000;
}

body.page-challenge .site-content {
  position: relative;
  z-index: 10;
}

.challenge-page {
  width: 100%;
  padding: 40px 0 56px;
}

/* 三块毛玻璃：尺寸对齐一键购买 .cart-hero-panel */
.challenge-glass {
  position: relative;
  width: 82%;
  max-width: 1100px;
  min-height: 420px;
  margin: 0 auto 26px;
  padding: 42px 46px 40px;
  border-radius: 28px;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.06),
    -8px 8px 32px rgba(0, 0, 0, 0.4),
    8px -8px 24px rgba(255, 255, 255, 0.02),
    inset 0 1px 0 rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(24px) saturate(1.1);
  -webkit-backdrop-filter: blur(24px) saturate(1.1);
}

.challenge-glass::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 29px;
  padding: 1px;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.08) 0%,
    rgba(255, 255, 255, 0.03) 28%,
    transparent 52%,
    transparent 78%
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.challenge-glass-inner {
  text-align: center;
  margin-bottom: 24px;
}

.challenge-kicker {
  margin: 0 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.72);
}

.challenge-main-title {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
}

.challenge-main-sub {
  margin: 10px 0 0;
  font-size: clamp(1rem, 2.1vw, 1.2rem);
  color: rgba(255, 255, 255, 0.92);
}

.challenge-intro,
.challenge-awards,
.challenge-judging,
.challenge-flow,
.challenge-week,
.challenge-more,
.challenge-sponsor {
  margin: 16px 0 0;
  text-align: center;
}

.challenge-page h2 {
  margin: 0 0 14px;
  font-size: clamp(1.2rem, 2.1vw, 1.55rem);
  color: #ffffff;
  letter-spacing: 0.02em;
}

.challenge-page h2 span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.66);
}

.challenge-page h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  color: #ffffff;
}

.challenge-page p,
.challenge-page li {
  margin: 0 0 10px;
  font-size: clamp(0.9rem, 1.2vw, 1rem);
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.88);
}

.challenge-award-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.challenge-award-card {
  border-radius: 12px;
  padding: 14px 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
}

.challenge-judging ol {
  margin: 0;
  padding-left: 20px;
  text-align: left;
}

.challenge-timeline {
  display: grid !important;
  grid-template-columns: repeat(4, 1fr) !important;
  gap: 12px;
  width: 100%;
  box-sizing: border-box;
}

.challenge-step {
  width: 100%;
  min-width: 0;
  border-radius: 10px;
  padding: 14px 10px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 168px;
  box-sizing: border-box;
}

.challenge-step span {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  color: #000000;
  font-size: 12px;
  font-weight: 700;
  flex-shrink: 0;
}

.challenge-step p {
  margin: 10px 0 0;
  font-size: clamp(0.78rem, 1.05vw, 0.92rem);
  line-height: 1.45;
  width: 100%;
}

.challenge-link-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
}

.challenge-link-row code {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.35);
  color: #ffffff;
  overflow-wrap: anywhere;
}

#challenge-copy-btn {
  height: 38px;
  border: none;
  border-radius: 10px;
  padding: 0 14px;
  font-size: 0.88rem;
  color: #ffffff;
  background: var(--kw-btn-bg);
  border: var(--kw-btn-border);
  box-shadow: var(--kw-btn-shadow);
  cursor: pointer;
}

.challenge-sponsor-placeholder {
  min-height: 86px;
  border-radius: 12px;
  border: 1px dashed rgba(255, 255, 255, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.82);
}

.challenge-footer {
  width: 82%;
  max-width: 1100px;
  min-height: 120px;
  margin: 0 auto;
  padding: 20px 26px 22px;
  text-align: center;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.46);
  color: rgba(255, 255, 255, 0.88);
}

.challenge-footer p {
  margin: 0 0 8px;
  font-size: 0.92rem;
}

.challenge-footer a {
  color: #ffffff;
  text-decoration: none;
}

@media (max-width: 1024px) {
  .challenge-glass,
  .challenge-footer {
    width: 90%;
    padding-left: 24px;
    padding-right: 24px;
  }
  .challenge-award-grid {
    grid-template-columns: 1fr;
  }
  .challenge-timeline {
    display: grid !important;
    grid-template-columns: repeat(4, 1fr) !important;
    gap: 12px;
  }
  .challenge-step {
    min-height: 160px;
    padding: 12px 8px;
  }
  .challenge-step p {
    font-size: clamp(0.72rem, 1.4vw, 0.86rem);
    line-height: 1.4;
  }
}

@media (max-width: 640px) {
  .challenge-page {
    padding-top: 20px;
  }
  .challenge-glass,
  .challenge-footer {
    width: 92%;
    min-height: auto;
    border-radius: 20px;
    padding: 22px 16px 20px;
  }
  .challenge-glass::before {
    border-radius: 21px;
  }
  .challenge-link-row {
    grid-template-columns: 1fr;
  }
  .challenge-timeline {
    display: grid !important;
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 12px;
  }
  .challenge-step {
    min-height: 140px;
  }
}

/* ========== 报名表单 + 规则摘要 ========== */
.challenge-register-panel {
  text-align: left;
}

.challenge-register-time {
  letter-spacing: 0.04em;
}

.challenge-register-form {
  display: block !important;
  margin-top: 28px;
  max-width: 560px;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
}

.challenge-field {
  display: block !important;
  width: 100% !important;
  text-align: left;
  margin: 0 0 28px;
  box-sizing: border-box;
}

.challenge-field span {
  display: block;
  margin-bottom: 10px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.55);
}

.challenge-field input {
  display: block;
  width: 100% !important;
  max-width: 100%;
  box-sizing: border-box;
  height: 48px;
  padding: 0 0 10px;
  border: none;
  border-radius: 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  background: transparent;
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: -0.01em;
  outline: none;
  transition: border-color 0.2s ease;
}

.challenge-field input::placeholder {
  color: rgba(255, 255, 255, 0.28);
}

.challenge-field input:focus {
  border-bottom-color: rgba(255, 255, 255, 0.85);
}

.challenge-agree {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 0 0 28px;
  padding: 14px 0;
  border: none;
  border-radius: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: transparent;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.9rem;
  line-height: 1.45;
  cursor: pointer;
  width: 100%;
  box-sizing: border-box;
}

.challenge-agree input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: #7a0c18;
  flex-shrink: 0;
}

.challenge-register-actions {
  display: block;
  width: 100%;
  margin: 0 0 12px;
  box-sizing: border-box;
}

.challenge-register-actions .challenge-btn {
  display: block;
  width: 100%;
  margin: 0 0 12px;
}

.challenge-register-actions .challenge-btn:last-child {
  margin-bottom: 0;
}

.challenge-btn {
  min-height: 50px;
  height: auto;
  padding: 12px 16px;
  border-radius: 980px;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: opacity 0.2s ease, transform 0.15s ease;
  width: 100%;
  box-sizing: border-box;
}

.challenge-btn:hover {
  opacity: 0.92;
}

.challenge-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.challenge-btn-primary {
  color: #ffffff;
  background: #7a0c18;
}

.challenge-btn-secondary {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.challenge-register-msg {
  margin: 4px 0 0;
  font-size: 0.92rem;
  line-height: 1.5;
  text-align: center;
}

.challenge-register-msg.is-ok {
  color: #7dffb3;
}

.challenge-register-msg.is-error {
  color: #ff8f8f;
}

.challenge-rules-summary {
  margin-top: 28px;
  padding-top: 8px;
  text-align: left;
}

.challenge-rules-summary h2 {
  text-align: center;
}

.challenge-rules-summary h3 {
  margin-top: 14px;
  color: rgba(255, 220, 180, 0.92);
}

.challenge-qr-row {
  display: flex;
  justify-content: center;
  margin-top: 18px;
}

.challenge-qr {
  margin: 0;
  text-align: center;
}

.challenge-qr img {
  width: 180px;
  height: 180px;
  object-fit: contain;
  border-radius: 12px;
  background: #ffffff;
  padding: 8px;
  box-sizing: border-box;
}

.challenge-qr figcaption {
  margin-top: 10px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.72);
}

@media (max-width: 640px) {
  .challenge-register-form {
    display: block !important;
    width: 100%;
  }

  .challenge-field {
    display: block !important;
    width: 100% !important;
    margin-bottom: 24px;
  }

  .challenge-field input {
    width: 100% !important;
  }

  .challenge-register-actions {
    display: block;
    width: 100%;
  }

  .challenge-register-actions .challenge-btn {
    display: block;
    width: 100%;
  }
}

/* 作品提交入口（报名表单下方） */
.challenge-submit-entry {
  margin: 40px 0 8px;
  padding: 28px 24px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  text-align: center;
}

.challenge-submit-entry h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.challenge-submit-entry p {
  margin: 0 0 20px;
  opacity: 0.85;
  line-height: 1.6;
  font-size: 0.95rem;
}

.challenge-submit-entry-btn {
  display: inline-block;
  text-decoration: none;
  max-width: 360px;
}

/* FAQ */
.challenge-faq-panel {
  margin-top: 48px;
  margin-bottom: 32px;
}

.challenge-faq-list {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.challenge-faq-item {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  overflow: hidden;
}

.challenge-faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 20px;
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1.45;
  user-select: none;
}

.challenge-faq-item summary::-webkit-details-marker {
  display: none;
}

.challenge-faq-item summary::after {
  content: "+";
  float: right;
  font-weight: 400;
  opacity: 0.7;
}

.challenge-faq-item[open] summary::after {
  content: "−";
}

.challenge-faq-answer {
  padding: 0 20px 18px;
  opacity: 0.9;
  line-height: 1.65;
  font-size: 0.92rem;
}

.challenge-faq-answer p {
  margin: 0 0 10px;
}

.challenge-faq-answer ul,
.challenge-faq-answer ol {
  margin: 0;
  padding-left: 1.25em;
}

.challenge-faq-answer li {
  margin-bottom: 8px;
}

.challenge-faq-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 4px;
}

.challenge-faq-table th,
.challenge-faq-table td {
  border: 1px solid rgba(255, 255, 255, 0.16);
  padding: 10px 12px;
  text-align: left;
}

.challenge-faq-table th {
  background: rgba(255, 255, 255, 0.08);
  font-weight: 600;
}

@media (max-width: 640px) {
  .challenge-submit-entry {
    padding: 22px 16px;
  }

  .challenge-submit-entry-btn {
    display: block;
    width: 100%;
    max-width: none;
    text-align: center;
  }

  .challenge-faq-item summary {
    padding: 14px 16px;
    font-size: 0.92rem;
  }

  .challenge-faq-answer {
    padding: 0 16px 14px;
  }
}