/* ============ 帮助中心 · 页面专属样式（作用域 .page-faq） ============ */
.page-faq {
  --faq-body: #a9b7cb;
  --faq-line: rgba(124, 140, 166, 0.24);
  --faq-line-strong: rgba(124, 140, 166, 0.42);
  --faq-panel: rgba(30, 37, 48, 0.72);
  display: block;
  color: var(--c-fog);
  overflow-x: hidden;
}

.page-faq a {
  text-decoration: none;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 5vw, 44px) 0 clamp(52px, 9vw, 92px);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(45, 226, 230, 0.16), transparent 60%),
    radial-gradient(95% 85% at 0% 100%, rgba(255, 107, 53, 0.2), transparent 62%),
    var(--c-indigo-deep);
}

.page-faq .faq-hero__slice {
  position: absolute;
  left: -12%;
  right: -12%;
  bottom: -84px;
  height: 180px;
  background: linear-gradient(90deg, var(--c-orange), rgba(45, 226, 230, 0.7) 60%, transparent);
  transform: rotate(-3.2deg);
  opacity: 0.16;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 44px;
  background: var(--c-indigo);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: 16px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-narrow);
  font-weight: 900;
  font-size: clamp(27px, 6.4vw, 52px);
  line-height: 1.16;
  letter-spacing: 0.005em;
  margin: 12px 0 0;
  max-width: 20em;
  color: #ffffff;
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 64ch;
  color: var(--faq-body);
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.85;
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
}

.page-faq .faq-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 13px 15px;
  border-radius: var(--radius-md);
  background: var(--glass);
  border: 1px solid var(--faq-line);
  backdrop-filter: blur(8px);
}

.page-faq .faq-hero__num {
  font-size: var(--step-20);
  font-weight: 700;
  color: var(--c-cyan);
  line-height: 1.2;
}

.page-faq .faq-hero__cap {
  font-size: var(--step-12);
  letter-spacing: 0.05em;
  color: var(--c-mist);
}

/* ---------- 粘性索引条 ---------- */
.page-faq .faq-index {
  position: sticky;
  top: var(--bar-h);
  z-index: 20;
  background: rgba(8, 20, 40, 0.88);
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
  backdrop-filter: blur(14px);
}

.page-faq .faq-index__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-faq .faq-index__inner::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-orange);
  padding-right: 4px;
  border-right: 1px solid var(--faq-line-strong);
  margin-right: 2px;
}

.page-faq .faq-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--faq-line);
  color: var(--c-fog);
  font-size: var(--step-14);
  white-space: nowrap;
  transition: border-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.page-faq .faq-index__link[aria-current] {
  background: rgba(255, 107, 53, 0.16);
  border-color: rgba(255, 107, 53, 0.62);
  color: var(--c-orange);
}

/* ---------- 通用区块 ---------- */
.page-faq .faq-block {
  padding: clamp(40px, 7vw, 84px) 0;
}

.page-faq .faq-block--a {
  background: linear-gradient(180deg, transparent, rgba(255, 107, 53, 0.05) 35%, transparent);
}

.page-faq .faq-block--b {
  background: linear-gradient(180deg, transparent, rgba(45, 226, 230, 0.05) 35%, transparent);
}

.page-faq .faq-block__head {
  max-width: 70ch;
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-block__title {
  font-family: var(--font-narrow);
  font-weight: 800;
  font-size: clamp(21px, 4.1vw, 33px);
  line-height: 1.28;
  margin: 8px 0 0;
  color: #ffffff;
}

.page-faq .faq-block__lede {
  margin: 12px 0 0;
  color: var(--faq-body);
  font-size: 16px;
  line-height: 1.85;
}

.page-faq .faq-block__note {
  margin-top: 22px;
}

.page-faq .faq-block__note a {
  color: var(--c-cyan);
  border-bottom: 1px solid rgba(45, 226, 230, 0.4);
}

/* ---------- 高频问题卡片 ---------- */
.page-faq .faq-cards {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.page-faq .faq-cards__item {
  display: flex;
  flex-direction: column;
  gap: 9px;
  padding: 18px;
  border-radius: var(--radius-md);
  background: var(--glass);
  border: 1px solid var(--faq-line);
  transition: border-color var(--t-fast) var(--ease),
    background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-faq .faq-cards__item:hover {
  border-color: var(--faq-line-strong);
  background: var(--glass-strong);
  transform: translateY(-2px);
}

.page-faq .faq-cards__item .tag {
  align-self: flex-start;
}

.page-faq .faq-cards__title {
  margin: 0;
  font-size: var(--step-16);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-fog);
}

.page-faq .faq-cards__text {
  margin: 0;
  font-size: var(--step-14);
  line-height: 1.75;
  color: var(--c-mist);
}

.page-faq .faq-cards__link {
  margin-top: auto;
  padding-top: 4px;
  font-size: var(--step-14);
  font-weight: 600;
  color: var(--c-cyan);
  font-family: var(--font-mono);
}

.page-faq .faq-cards__link::after {
  content: " →";
}

.page-faq .faq-cards__link:hover {
  color: var(--c-orange);
}

/* ---------- 编号轨道 ---------- */
.page-faq .faq-track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-faq .faq-track::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg,
      rgba(255, 107, 53, 0.75),
      rgba(255, 107, 53, 0.28) 55%,
      transparent);
}

.page-faq .faq-track--b::before {
  background: linear-gradient(180deg,
      rgba(45, 226, 230, 0.75),
      rgba(45, 226, 230, 0.28) 55%,
      transparent);
}

.page-faq .faq-track__item {
  position: relative;
  padding-left: 56px;
  margin-bottom: 10px;
}

.page-faq .faq-track__item:last-child {
  margin-bottom: 0;
}

.page-faq .faq-step__num {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 2;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--c-charcoal-2);
  border: 1px solid var(--faq-line-strong);
  color: var(--c-orange);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-faq .faq-track--b .faq-step__num {
  color: var(--c-cyan);
}

/* 折叠步骤 */
.page-faq .faq-step {
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--faq-line);
  backdrop-filter: blur(6px);
  transition: border-color var(--t-fast) var(--ease),
    background var(--t-fast) var(--ease);
}

.page-faq .faq-step[open] {
  background: var(--faq-panel);
  border-color: rgba(255, 107, 53, 0.5);
}

.page-faq .faq-track--b .faq-step[open] {
  border-color: rgba(45, 226, 230, 0.5);
}

.page-faq .faq-step__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 15px;
  min-height: 52px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-fog);
}

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

.page-faq .faq-step__label {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-step__chev {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-left: auto;
  border-right: 2px solid var(--c-mist);
  border-bottom: 2px solid var(--c-mist);
  transform: rotate(45deg);
  transition: transform var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease);
}

.page-faq .faq-step[open] .faq-step__chev {
  transform: rotate(-135deg);
  border-color: var(--c-orange);
}

.page-faq .faq-track--b .faq-step[open] .faq-step__chev {
  border-color: var(--c-cyan);
}

.page-faq .faq-step__body {
  padding: 0 15px 15px;
}

.page-faq .faq-step__body p {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--faq-line);
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-body);
}

/* ---------- 登录排查配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(22px, 3.4vw, 34px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--faq-line);
  background: var(--c-charcoal-2);
  position: relative;
}

.page-faq .faq-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, transparent 45%, rgba(8, 20, 40, 0.85)),
    repeating-linear-gradient(90deg, rgba(124, 140, 166, 0.1) 0 1px, transparent 1px 64px);
}

.page-faq .faq-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-figure__cap {
  position: relative;
  z-index: 1;
  margin: -34px 0 0;
  padding: 0 16px 14px;
  font-size: var(--step-12);
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- 设备兼容核对 ---------- */
.page-faq .faq-compat {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
  align-items: start;
}

.page-faq .faq-compat__media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--faq-line);
  background: var(--c-charcoal-2);
}

.page-faq .faq-compat__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(200deg, rgba(45, 226, 230, 0.18), transparent 55%),
    repeating-linear-gradient(0deg, rgba(124, 140, 166, 0.1) 0 1px, transparent 1px 52px);
}

.page-faq .faq-compat__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-compat__list {
  list-style: none;
  counter-reset: none;
  margin: 18px 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-compat__list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.045);
  border-left: 2px solid rgba(45, 226, 230, 0.55);
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-body);
}

.page-faq .faq-compat__list li .mono {
  flex: 0 0 auto;
  color: var(--c-cyan);
  font-weight: 700;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-block--cta {
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-support {
  display: grid;
  gap: 24px;
  grid-template-columns: 1fr;
  padding: clamp(20px, 3.6vw, 34px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--faq-line-strong);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(255, 107, 53, 0.16), transparent 60%),
    var(--c-charcoal-2);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-support__main .faq-block__title {
  margin-top: 6px;
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-support__meta {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--faq-line);
}

.page-faq .faq-support__row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(11, 27, 58, 0.72);
}

.page-faq .faq-support__row dt {
  font-size: var(--step-12);
  letter-spacing: 0.12em;
  color: var(--c-mist);
}

.page-faq .faq-support__row dd {
  margin: 0;
  font-size: 15px;
  color: var(--c-fog);
  word-break: break-all;
}

.page-faq .faq-support__row dd.mono {
  color: var(--c-cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-step__head {
    font-size: var(--step-16);
    padding: 15px 18px;
  }

  .page-faq .faq-step__body {
    padding: 0 18px 18px;
  }

  .page-faq .faq-support__row {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-compat {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: clamp(28px, 4vw, 48px);
  }

  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: clamp(24px, 3.4vw, 40px);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-track::before {
    left: 21px;
  }

  .page-faq .faq-track__item {
    padding-left: 64px;
    margin-bottom: 12px;
  }

  .page-faq .faq-step__num {
    width: 44px;
    height: 44px;
    font-size: var(--step-14);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cards__item,
  .page-faq .faq-step,
  .page-faq .faq-step__chev,
  .page-faq .faq-index__link {
    transition: none;
  }

  .page-faq .faq-cards__item:hover {
    transform: none;
  }
}