/* ===== 三亿体育 · 常见问题 FAQ 页面专属样式 ===== */
.page-faq {
  --faq-text-soft: rgba(245, 247, 250, 0.74);
  --faq-line: rgba(255, 255, 255, 0.10);
  --faq-grid-line: rgba(255, 255, 255, 0.045);
  position: relative;
  background-color: var(--c-blue);
  color: var(--c-white);
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--faq-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-grid-line) 1px, transparent 1px);
  background-size: 46px 46px;
}

/* 顶部区域 */
.faq-masthead {
  position: relative;
  z-index: 1;
  padding: 34px 0 26px;
}

.faq-breadcrumb {
  margin-bottom: 28px;
}

.faq-masthead__title {
  font-family: var(--font-headline);
  font-size: clamp(38px, 8vw, 76px);
  line-height: 0.95;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  margin: 0 0 18px;
  max-width: 900px;
}

.faq-masthead__title span {
  display: block;
  color: var(--c-yellow);
}

.faq-masthead__desc {
  max-width: 680px;
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--c-cyan);
  font-size: 15px;
  line-height: 1.7;
  color: var(--faq-text-soft);
}

/* 顶部横幅 */
.faq-banner {
  position: relative;
  z-index: 1;
  height: 190px;
  margin-bottom: 34px;
  overflow: hidden;
  border-top: 4px solid var(--c-yellow);
  border-bottom: 4px solid var(--c-red);
}

.faq-banner__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 主体布局 */
.faq-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-bottom: 48px;
}

/* 左侧分类导航 */
.faq-index {
  border: 2px solid rgba(255, 255, 255, 0.12);
  background-color: rgba(10, 31, 68, 0.74);
  padding: 18px 16px 20px;
  box-shadow: var(--shadow-card);
}

.faq-index__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.14);
}

.faq-index__label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-cyan);
  letter-spacing: 0.08em;
}

.faq-index__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--faq-text-soft);
}

.faq-index__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.faq-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  padding: 11px 14px;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-white);
  text-decoration: none;
  background-color: transparent;
  background-image: linear-gradient(
    105deg,
    rgba(255, 255, 255, 0.07) 0%,
    rgba(255, 255, 255, 0.07) 80%,
    rgba(255, 255, 255, 0.14) 80%,
    rgba(255, 255, 255, 0.14) 100%
  );
  border-left: 4px solid var(--c-gray);
  transition:
    border-color var(--t-fast),
    background-color var(--t-fast),
    transform var(--t-fast);
}

.faq-index__link:hover,
.faq-index__link:focus {
  border-left-color: var(--c-yellow);
  background-color: rgba(255, 215, 0, 0.08);
  transform: translateX(3px);
}

.faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-red);
}

.faq-index__cta {
  display: flex;
  width: 100%;
  justify-content: center;
  text-decoration: none;
}

/* 右侧问答列表 */
.faq-qalist {
  min-width: 0;
}

.faq-cat {
  scroll-margin-top: calc(var(--header-height) + 24px);
  margin-bottom: 38px;
}

.faq-cat__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 2px solid rgba(255, 255, 255, 0.09);
}

.faq-cat__num {
  display: block;
  font-family: var(--font-headline);
  font-size: 52px;
  line-height: 0.85;
  color: transparent;
  -webkit-text-stroke: 2px var(--c-yellow);
}

.faq-cat__heading {
  flex: 1;
  min-width: 180px;
}

.faq-cat__title {
  font-family: var(--font-headline);
  font-size: 30px;
  line-height: 1;
  text-transform: uppercase;
  margin: 0 0 6px;
  letter-spacing: 0.4px;
}

.faq-cat__desc {
  margin: 0;
  font-size: 14px;
  color: var(--faq-text-soft);
}

.faq-cat__list {
  display: grid;
  gap: 12px;
}

/* 手风琴项 */
.faq-item {
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.10);
  border-left: 4px solid rgba(0, 229, 255, 0.7);
  transition:
    border-color var(--t-med),
    background-color var(--t-med),
    box-shadow var(--t-med);
}

.faq-item[open] {
  border-left-color: var(--c-red);
  background: rgba(255, 255, 255, 0.055);
  box-shadow: var(--shadow-card);
}

.faq-item__q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  user-select: none;
}

.faq-item__q::-webkit-details-marker {
  display: none;
}

.faq-item__q:hover {
  background: rgba(255, 255, 255, 0.03);
}

.faq-item__marker {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background: rgba(255, 255, 255, 0.10);
  color: var(--c-yellow);
  font-family: var(--font-mono);
  font-size: 16px;
  transition:
    background-color var(--t-fast),
    color var(--t-fast),
    transform var(--t-med);
}

.faq-item__marker::before {
  content: "+";
}

.faq-item[open] .faq-item__marker {
  background: var(--c-red);
  color: var(--c-white);
  transform: rotate(45deg);
}

.faq-item__q-text {
  flex: 1;
  min-width: 0;
  transition: color var(--t-fast);
}

.faq-item[open] .faq-item__q-text {
  color: var(--c-red);
}

.faq-item__q-tag .tag {
  margin: 0;
  flex-shrink: 0;
  font-size: 12px;
}

.faq-item__a {
  padding: 2px 16px 16px 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-text-soft);
  border-top: 1px dashed rgba(255, 255, 255, 0.10);
}

.faq-item__a p {
  margin: 14px 0 0;
}

.faq-item__a a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--t-fast);
}

.faq-item__a a:hover {
  color: var(--c-yellow);
}

.faq-highlight {
  color: var(--c-red);
  font-weight: 700;
}

/* 隐私安全图文区 */
.faq-privacy-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.faq-privacy-grid__media {
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: var(--c-blue);
  box-shadow: 8px 8px 0 rgba(0, 229, 255, 0.10);
}

.faq-privacy-grid__img {
  display: block;
  width: 100%;
  height: auto;
}

.faq-privacy-grid__note {
  margin: 0;
  padding: 12px 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--faq-text-soft);
  background: rgba(255, 255, 255, 0.06);
}

.faq-cat__list--privacy {
  gap: 12px;
}

/* 底部联系 CTA */
.faq-cta {
  position: relative;
  z-index: 1;
  padding: 42px 0;
  margin-top: 8px;
  border-top: 2px solid rgba(255, 255, 255, 0.12);
  background:
    repeating-linear-gradient(135deg, rgba(255, 215, 0, 0.08) 0 6px, transparent 6px 18px),
    linear-gradient(120deg, var(--c-blue) 0%, rgba(18, 41, 79, 0.96) 60%, var(--c-blue) 100%);
}

.faq-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.faq-cta__copy {
  max-width: 560px;
}

.faq-cta__title {
  font-family: var(--font-headline);
  font-size: 28px;
  line-height: 1.1;
  text-transform: uppercase;
  margin: 12px 0 6px;
}

.faq-cta__text {
  margin: 0;
  color: var(--faq-text-soft);
}

.faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.faq-cta__actions .btn {
  text-decoration: none;
}

/* 平板以上 */
@media (min-width: 768px) {
  .faq-masthead {
    padding: 44px 0 32px;
  }

  .faq-masthead__desc {
    font-size: 16px;
  }

  .faq-banner {
    height: 320px;
    margin-bottom: 44px;
  }

  .faq-item__q {
    padding: 18px 20px;
  }

  .faq-item__a {
    padding-left: 56px;
  }

  .faq-privacy-grid {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .faq-cta {
    padding: 48px 0;
  }

  .faq-cta__title {
    font-size: 32px;
  }
}

/* 桌面双栏 */
@media (min-width: 1024px) {
  .faq-layout {
    grid-template-columns: 270px minmax(0, 1fr);
    gap: 40px;
    align-items: flex-start;
  }

  .faq-index {
    position: sticky;
    top: calc(var(--header-height) + 24px);
  }

  .faq-index__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
  }

  .faq-index__link {
    width: 100%;
    padding: 13px 14px;
  }
}