/* ========== 帮助中心 · page-faq ========== */
.page-faq {
  --faq-num-size: 2.375rem;
  --faq-item-pad: 1.125rem;
  --faq-item-gap: 0.875rem;
  background-color: var(--c-ink);
  color: var(--c-text);
  overflow-x: hidden;
}
.page-faq a {
  -webkit-tap-highlight-color: transparent;
}

/* ----- 面包屑 ----- */
.page-faq .faq-breadcrumb {
  padding: 1.25rem 0 0.25rem;
}
.page-faq .faq-breadcrumb .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.84375rem;
  color: var(--c-text-dim);
}
.page-faq .faq-breadcrumb .breadcrumb li + li::before {
  content: "／";
  margin-right: 0.5rem;
  color: rgba(160, 160, 168, 0.5);
}
.page-faq .faq-breadcrumb .breadcrumb a {
  color: var(--c-text-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}
.page-faq .faq-breadcrumb .breadcrumb a:hover {
  color: var(--c-accent);
}
.page-faq .faq-breadcrumb .breadcrumb [aria-current="page"] {
  color: var(--c-accent);
}

/* ----- 顶部简介 ----- */
.page-faq .faq-intro {
  position: relative;
  padding: 2.5rem 0 3rem;
}
.page-faq .faq-intro::before {
  content: "";
  position: absolute;
  right: -7rem;
  top: -5rem;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 69, 0, 0.16), transparent 68%);
  pointer-events: none;
}
.page-faq .faq-intro::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 69, 0, 0.5), rgba(0, 229, 255, 0.4), transparent);
}
.page-faq .faq-intro__grid {
  display: grid;
  gap: 2.25rem;
  align-items: center;
}
.page-faq .faq-intro .eyebrow {
  color: var(--c-accent);
  letter-spacing: 0.16em;
}
.page-faq .faq-intro h1 {
  margin: 0.75rem 0 1.125rem;
  max-width: 16ch;
  font-family: var(--font-display);
  font-size: clamp(2.125rem, 6vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--c-text);
}
.page-faq .faq-intro h1::after {
  content: "";
  display: block;
  width: 4.25rem;
  height: 5px;
  margin-top: 1.25rem;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transform: skewX(-18deg);
}
.page-faq .faq-intro .lede {
  margin: 0 0 1.625rem;
  max-width: 40em;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--c-text-dim);
}
.page-faq .faq-intro__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}
.page-faq .faq-intro__tags .tag {
  text-decoration: none;
  transition: transform 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}
.page-faq .faq-intro__tags .tag:hover {
  transform: translateY(-2px);
}
.page-faq .faq-intro__visual {
  margin: 0;
}
.page-faq .faq-intro__visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.28);
}

/* ----- 热门问题 ----- */
.page-faq .faq-hot {
  padding: 3.5rem 0 2.5rem;
}
.page-faq .faq-hot__inner {
  max-width: 56rem;
}
.page-faq .faq-section-head {
  margin-bottom: 1.75rem;
}
.page-faq .faq-section-head .eyebrow {
  color: var(--c-primary);
  letter-spacing: 0.16em;
}
.page-faq .faq-section-head h2 {
  margin: 0.375rem 0 0.625rem;
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  line-height: 1.1;
  color: var(--c-text);
}
.page-faq .faq-note {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--c-text-dim);
}
.page-faq .faq-hot__list {
  display: grid;
  gap: 0.875rem;
  margin-top: 2rem;
}

/* ----- 折叠问题项 ----- */
.page-faq .faq-item {
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.page-faq .faq-item:hover {
  border-color: rgba(255, 69, 0, 0.3);
}
.page-faq .faq-item[open] {
  border-color: rgba(255, 69, 0, 0.5);
  box-shadow: var(--shadow-primary);
}
.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: var(--faq-item-gap);
  padding: var(--faq-item-pad) calc(var(--faq-item-pad) + 0.25rem);
  list-style: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.page-faq .faq-item summary::-webkit-details-marker,
.page-faq .faq-item summary::marker {
  display: none;
  content: "";
}
.page-faq .faq-item__num {
  flex-shrink: 0;
  display: inline-grid;
  place-items: center;
  width: var(--faq-num-size);
  height: var(--faq-num-size);
  border-radius: 50%;
  background: rgba(255, 69, 0, 0.14);
  border: 1px solid rgba(255, 69, 0, 0.3);
  color: #ff8a65;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
}
.page-faq .faq-item__q {
  flex: 1;
  min-width: 0;
  font-size: 0.96875rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-text);
}
.page-faq .faq-item__icon {
  flex-shrink: 0;
  position: relative;
  width: 1.375rem;
  height: 1.375rem;
  border-radius: 50%;
  border: 1px solid var(--c-line);
  transition: border-color 0.3s ease, transform 0.4s ease;
}
.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.625rem;
  height: 2px;
  background: var(--c-text-dim);
  transform: translate(-50%, -50%);
  transition: background 0.3s ease, transform 0.4s ease;
}
.page-faq .faq-item__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}
.page-faq .faq-item[open] .faq-item__icon {
  border-color: rgba(0, 229, 255, 0.5);
  transform: rotate(180deg);
}
.page-faq .faq-item[open] .faq-item__icon::before,
.page-faq .faq-item[open] .faq-item__icon::after {
  background: var(--c-accent);
}
.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}
.page-faq .faq-item__a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.page-faq .faq-item[open] .faq-item__a {
  grid-template-rows: 1fr;
}
.page-faq .faq-item__a-inner {
  min-height: 0;
  overflow: hidden;
  padding-right: calc(var(--faq-item-pad) + 0.5rem);
  padding-bottom: calc(var(--faq-item-pad) + 0.375rem);
  padding-left: calc(var(--faq-item-pad) + var(--faq-num-size) + var(--faq-item-gap));
  color: var(--c-text-dim);
  font-size: 0.9375rem;
  line-height: 1.75;
}
.page-faq .faq-item__a-inner p:first-child {
  margin-top: 0;
}
.page-faq .faq-item__a-inner p:last-child {
  margin-bottom: 0;
}

/* ----- 观赛指南（浅色间歇带） ----- */
.page-faq .faq-guide {
  margin-top: 3rem;
  padding: 3.5rem 0 3rem;
  background: var(--c-light);
  color: var(--c-ink);
  border-radius: 2.75rem 2.75rem 0 0;
}
.page-faq .faq-guide .eyebrow {
  color: var(--c-primary);
  letter-spacing: 0.16em;
}
.page-faq .faq-guide h2 {
  margin: 0.375rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  line-height: 1.12;
  color: var(--c-ink);
}
.page-faq .faq-guide .lede {
  margin: 0 0 1.875rem;
  max-width: 38em;
  font-size: 1rem;
  line-height: 1.65;
  color: rgba(11, 11, 15, 0.72);
}
.page-faq .faq-guide__grid {
  display: grid;
  gap: 2rem;
}
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .faq-steps__item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 1.375rem 1.5rem;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(11, 11, 15, 0.07);
  border-radius: 1.75rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-faq .faq-steps__item:last-child {
  margin-bottom: 0;
}
.page-faq .faq-steps__item:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(11, 11, 15, 0.08);
}
.page-faq .faq-steps__mark {
  flex-shrink: 0;
  display: inline-grid;
  place-items: center;
  width: 2.625rem;
  height: 2.625rem;
  border-radius: 0.875rem;
  background: rgba(255, 69, 0, 0.1);
  border: 1px solid rgba(255, 69, 0, 0.3);
  color: var(--c-primary);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
}
.page-faq .faq-steps__body h3 {
  margin: 0 0 0.375rem;
  font-size: 1.0625rem;
  line-height: 1.3;
  color: var(--c-ink);
}
.page-faq .faq-steps__body p {
  margin: 0;
  font-size: 0.90625rem;
  line-height: 1.65;
  color: rgba(11, 11, 15, 0.68);
}
.page-faq .faq-guide__visual {
  margin: 1.5rem 0 0;
}
.page-faq .faq-guide__visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 1.75rem;
  box-shadow: 0 14px 32px rgba(11, 11, 15, 0.16);
}

/* ----- 账户与同步 ----- */
.page-faq .faq-account {
  padding: 3.5rem 0 2.5rem;
}
.page-faq .faq-account .eyebrow {
  color: var(--c-accent-2);
  letter-spacing: 0.16em;
}
.page-faq .faq-account h2 {
  margin: 0.375rem 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  line-height: 1.12;
  color: var(--c-text);
}
.page-faq .faq-account__grid {
  display: grid;
  gap: 1rem;
}
.page-faq .faq-account__card {
  position: relative;
  overflow: hidden;
  padding: 1.5rem 1.375rem 1.375rem;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s ease, transform 0.3s ease;
}
.page-faq .faq-account__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--c-primary), var(--c-accent));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.page-faq .faq-account__card:hover {
  border-color: rgba(255, 69, 0, 0.35);
  transform: translateY(-2px);
}
.page-faq .faq-account__card:hover::before {
  opacity: 1;
}
.page-faq .faq-account__card-icon {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: rgba(122, 90, 248, 0.14);
  border: 1px solid rgba(122, 90, 248, 0.34);
  color: var(--c-accent-2);
  font-size: 1.125rem;
  margin-bottom: 0.875rem;
}
.page-faq .faq-account__card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--c-text);
}
.page-faq .faq-account__card p {
  margin: 0;
  font-size: 0.90625rem;
  line-height: 1.65;
  color: var(--c-text-dim);
}

/* ----- 联系支持 ----- */
.page-faq .faq-support {
  position: relative;
  padding: 3rem 0 4rem;
  border-top: 1px solid var(--c-line);
}
.page-faq .faq-support::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 50%;
  width: 4.5rem;
  height: 3px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transform: translateX(-50%);
}
.page-faq .faq-support .eyebrow {
  color: var(--c-accent);
  letter-spacing: 0.16em;
}
.page-faq .faq-support h2 {
  margin: 0.375rem 0 0.625rem;
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  line-height: 1.12;
  color: var(--c-text);
}
.page-faq .faq-support__head {
  margin-bottom: 1.75rem;
}
.page-faq .faq-support__lede {
  margin: 0;
  max-width: 36em;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--c-text-dim);
}
.page-faq .faq-support__grid {
  display: grid;
  gap: 1rem;
}
.page-faq .faq-support__item {
  padding: 1.375rem 1.5rem;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-radius: 1.75rem;
}
.page-faq .faq-support__label {
  display: block;
  margin-bottom: 0.375rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-text-dim);
}
.page-faq .faq-support__value {
  display: block;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-text);
  word-break: break-word;
}
.page-faq .faq-support__desc {
  margin: 0.375rem 0 0;
  font-size: 0.84375rem;
  line-height: 1.6;
  color: var(--c-text-dim);
}
.page-faq .faq-support__tail {
  margin-top: 1.75rem;
  padding: 1.125rem 1.375rem;
  border-radius: 1.25rem;
  background: rgba(0, 229, 255, 0.06);
  border: 1px solid rgba(0, 229, 255, 0.22);
  color: var(--c-text-dim);
  font-size: 0.90625rem;
  line-height: 1.7;
}
.page-faq .faq-support__tail a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}
.page-faq .faq-support__tail a:hover {
  color: var(--c-text);
}

/* ----- 桌面端布局 ----- */
@media (min-width: 768px) {
  .page-faq {
    --faq-item-pad: 1.375rem;
    --faq-item-gap: 1rem;
  }
  .page-faq .faq-breadcrumb {
    padding: 1.75rem 0 0.5rem;
  }
  .page-faq .faq-intro {
    padding: 4.5rem 0 5rem;
  }
  .page-faq .faq-intro__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3.5rem;
  }
  .page-faq .faq-intro h1 {
    max-width: 18ch;
  }
  .page-faq .faq-hot {
    padding: 5rem 0 3.5rem;
  }
  .page-faq .faq-section-head {
    margin-bottom: 2.25rem;
  }
  .page-faq .faq-hot__list {
    margin-top: 2.5rem;
  }
  .page-faq .faq-guide {
    margin-top: 4.5rem;
    padding: 5rem 0 4.5rem;
    border-radius: 3.5rem 3.5rem 0 0;
  }
  .page-faq .faq-guide__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 3.5rem;
    align-items: center;
  }
  .page-faq .faq-guide__visual {
    margin-top: 0;
  }
  .page-faq .faq-steps__item {
    padding: 1.625rem 1.75rem;
    margin-bottom: 1.125rem;
  }
  .page-faq .faq-account {
    padding: 5rem 0 3.5rem;
  }
  .page-faq .faq-account__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-top: 2rem;
  }
  .page-faq .faq-account__card {
    padding: 1.75rem 1.625rem 1.625rem;
  }
  .page-faq .faq-support {
    padding: 4.5rem 0 5rem;
  }
  .page-faq .faq-support__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
  .page-faq .faq-support__tail {
    max-width: 38rem;
  }
}