/* ============================================================
   page-faq · 问题排查
   仪表盘式排查节奏：三条自查 → 折叠问答 → 流程 → 上手四步
   ============================================================ */

.page-faq {
  --faq-gap: 1rem;
  --faq-axis: var(--border);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  padding-bottom: 0;
}

.page-faq [id] {
  scroll-margin-top: 6rem;
}

.page-faq .breadcrumb {
  padding-block: 1.1rem 1.6rem;
}

/* ---------- 首屏：左上压字 + 右侧仪表盘 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 0 0 3rem;
  border-bottom: 1px solid var(--faq-axis);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(40, 199, 168, 0.13), transparent 58%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 78%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: linear-gradient(158deg, #000 4%, transparent 68%);
  mask-image: linear-gradient(158deg, #000 4%, transparent 68%);
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 2.25rem;
}

.page-faq .faq-hero__lead h1 {
  margin: 0.55rem 0 0;
  max-width: 22ch;
  font-size: clamp(1.75rem, 7.4vw, 3.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero__hl {
  color: var(--signal);
}

.page-faq .faq-hero__desc {
  margin: 1.35rem 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.9rem;
}

.page-faq .faq-dash {
  position: relative;
  padding: 1.3rem 1.35rem 1.45rem;
  border: 1px solid var(--faq-axis);
  background: var(--bg-3);
}

.page-faq .faq-dash::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 52px;
  height: 3px;
  background: var(--signal);
}

.page-faq .faq-dash::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 20px;
  height: 20px;
  border-right: 1px solid var(--jade);
  border-bottom: 1px solid var(--jade);
  pointer-events: none;
}

.page-faq .faq-dash__label {
  margin: 0 0 1.15rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-faq .faq-dash__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-dash__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 5vw, 1.75rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--signal);
}

.page-faq .faq-dash__key {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.79rem;
  line-height: 1.55;
  color: var(--text-dim);
}

/* ---------- 三条自查 ---------- */

.page-faq .faq-check {
  padding: 3.25rem 0;
  border-bottom: 1px solid var(--faq-axis);
  background: var(--bg);
}

.page-faq .faq-check__grid {
  display: grid;
  gap: 1.75rem;
  margin-top: 2rem;
}

.page-faq .faq-check__steps {
  display: grid;
  gap: 0.85rem;
  align-content: start;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 1.05rem;
  padding: 1.3rem 1.2rem;
  border: 1px solid var(--faq-axis);
  background: var(--bg-2);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-faq .faq-step:hover,
.page-faq .faq-step:focus-within {
  border-color: var(--jade);
  background: var(--bg-3);
}

.page-faq .faq-step__no {
  grid-row: 1 / 3;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 6vw, 2rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--signal);
}

.page-faq .faq-step__title {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .faq-step__body {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .faq-check__media {
  margin: 0;
  aspect-ratio: 3 / 4;
  overflow: hidden;
}

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

/* ---------- 折叠问答清单 ---------- */

.page-faq .faq-questions {
  padding: 3.25rem 0;
  border-bottom: 1px solid var(--faq-axis);
  background: linear-gradient(180deg, var(--bg-2), var(--bg) 40%);
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.85rem 0 2.1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--faq-axis);
}

.page-faq .faq-filter__btn {
  flex: 0 1 auto;
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--faq-axis);
  background: var(--bg-3);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-filter__btn:hover,
.page-faq .faq-filter__btn:focus-visible {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--signal-ink);
}

.page-faq .faq-group {
  margin-bottom: 2.6rem;
}

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

.page-faq .faq-group__title {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin: 0 0 1.1rem;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .faq-group__code {
  flex: none;
  padding: 0.2rem 0.5rem;
  background: var(--signal);
  color: var(--signal-ink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
}

.page-faq .faq-group__text {
  flex: 0 1 auto;
}

.page-faq .faq-group__axis {
  display: none;
  flex: 1 1 auto;
  height: 1px;
  min-width: 1rem;
  background: linear-gradient(90deg, var(--faq-axis), transparent);
}

.page-faq .faq-item {
  margin-bottom: 0.55rem;
  border: 1px solid var(--faq-axis);
  background: var(--bg-3);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

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

.page-faq .faq-item:hover {
  border-color: var(--jade);
}

.page-faq .faq-item[open] {
  border-color: var(--jade);
  background: var(--bg-2);
}

.page-faq .faq-item__q {
  position: relative;
  display: block;
  padding: 1rem 3.1rem 1rem 1.15rem;
  list-style: none;
  cursor: pointer;
  font-size: 0.97rem;
  font-weight: 600;
  line-height: 1.65;
  color: var(--text);
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover {
  color: var(--signal);
}

.page-faq .faq-item__q::after,
.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  top: 50%;
  background: var(--text-dim);
  transition: background 0.2s var(--ease), transform 0.25s var(--ease);
}

.page-faq .faq-item__q::after {
  right: 1.2rem;
  width: 12px;
  height: 2px;
  margin-top: -1px;
}

.page-faq .faq-item__q::before {
  right: calc(1.2rem + 5px);
  width: 2px;
  height: 12px;
  margin-top: -6px;
}

.page-faq .faq-item[open] .faq-item__q::before {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-item__q::after {
  background: var(--jade);
}

.page-faq .faq-item__a {
  padding: 0 1.15rem 1.15rem;
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-drop 0.28s var(--ease) both;
}

.page-faq .faq-item__a p {
  max-width: 68ch;
  margin: 0;
  padding-left: 0.9rem;
  border-left: 2px solid var(--faq-axis);
  font-size: 0.92rem;
  line-height: 1.82;
  color: var(--text-dim);
  transition: border-color 0.25s var(--ease);
}

.page-faq .faq-item[open] .faq-item__a p {
  border-left-color: var(--jade);
}

@keyframes faq-drop {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 排查流程 ---------- */

.page-faq .faq-flow {
  padding: 3.25rem 0;
  border-bottom: 1px solid var(--faq-axis);
  background: var(--bg);
}

.page-faq .faq-flow__grid {
  display: grid;
  gap: 2.25rem;
  margin-top: 2rem;
}

.page-faq .faq-flow__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-flow__node {
  position: relative;
  padding: 0 0 1.6rem 3.15rem;
}

.page-faq .faq-flow__node::before {
  content: "";
  position: absolute;
  left: 1.04rem;
  top: 1.5rem;
  bottom: -0.1rem;
  width: 1px;
  background: var(--faq-axis);
}

.page-faq .faq-flow__node:last-child {
  padding-bottom: 0;
}

.page-faq .faq-flow__node:last-child::before {
  display: none;
}

.page-faq .faq-flow__mark {
  position: absolute;
  left: 0.55rem;
  top: 0.15rem;
  display: grid;
  place-items: center;
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--jade);
  background: var(--bg);
}

.page-faq .faq-flow__mark::after {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--signal);
}

.page-faq .faq-flow__title {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.6;
}

.page-faq .faq-flow__title a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-flow__title a:hover,
.page-faq .faq-flow__title a:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-faq .faq-flow__body {
  max-width: 58ch;
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .faq-flow__media {
  margin: 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
}

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

/* ---------- 新手上手四步 ---------- */

.page-faq .faq-guide {
  padding: 3.25rem 0;
  border-bottom: 1px solid var(--faq-axis);
  background: linear-gradient(180deg, var(--bg-2), var(--bg) 60%);
}

.page-faq .faq-guide__track {
  display: grid;
  gap: 1.5rem;
  margin: 2.1rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-guide__step {
  position: relative;
  padding-left: 2.3rem;
}

.page-faq .faq-guide__step::before {
  content: "";
  position: absolute;
  left: 0.35rem;
  top: 0.6rem;
  width: 2px;
  height: calc(100% + 1.1rem);
  background: var(--faq-axis);
}

.page-faq .faq-guide__step:last-child::before {
  display: none;
}

.page-faq .faq-guide__tick {
  position: absolute;
  left: 0;
  top: 0.3rem;
  width: 0.75rem;
  height: 0.75rem;
  background: var(--signal);
}

.page-faq .faq-guide__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--jade);
}

.page-faq .faq-guide__title {
  margin: 0.3rem 0 0.4rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--text);
}

.page-faq .faq-guide__body {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--text-dim);
}

.page-faq .faq-guide__foot {
  margin: 2.1rem 0 0;
  padding-top: 1.2rem;
  border-top: 1px solid var(--faq-axis);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-guide__foot a {
  color: var(--jade);
  text-decoration: none;
  border-bottom: 1px solid var(--jade);
}

.page-faq .faq-guide__foot a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 兜底联系 ---------- */

.page-faq .faq-help {
  padding: 3.25rem 0 4.5rem;
  background: var(--bg);
}

.page-faq .faq-help__inner {
  position: relative;
  padding: 1.9rem 1.5rem 2.1rem;
  border: 1px solid var(--faq-axis);
  border-left: 3px solid var(--signal);
  background:
    linear-gradient(120deg, rgba(255, 210, 0, 0.06), transparent 55%),
    var(--bg-2);
}

.page-faq .faq-help__title {
  margin: 0 0 1rem;
  font-size: clamp(1.25rem, 4.6vw, 1.6rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-help__body {
  max-width: 66ch;
  margin: 0 0 0.85rem;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--text-dim);
}

.page-faq .faq-help__body a {
  color: var(--jade);
  text-decoration: none;
  border-bottom: 1px solid var(--jade);
}

.page-faq .faq-help__body a:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.page-faq .faq-help__meta {
  margin: 1.6rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px dashed var(--faq-axis);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--text-dim);
  word-break: break-all;
}

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding-bottom: 3.5rem;
  }

  .page-faq .faq-dash__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-group__axis {
    display: block;
  }

  .page-faq .faq-item__q {
    font-size: 1rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-check,
  .page-faq .faq-questions,
  .page-faq .faq-flow,
  .page-faq .faq-guide {
    padding-block: 4.25rem;
  }

  .page-faq .faq-check__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.8fr);
    align-items: start;
    gap: 2.5rem;
  }

  .page-faq .faq-flow__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 3rem;
  }

  /* 上手四步：横向刻度条 */
  .page-faq .faq-guide__track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-faq .faq-guide__step {
    padding: 1.7rem 0 0;
  }

  .page-faq .faq-guide__step::before {
    left: 0;
    right: -1.5rem;
    top: 0;
    width: auto;
    height: 2px;
  }

  .page-faq .faq-guide__step:last-child::before {
    display: none;
  }

  .page-faq .faq-guide__tick {
    left: 0;
    top: -5px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-hero {
    padding-bottom: 4.25rem;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(300px, 0.85fr);
    gap: 3.75rem;
  }

  .page-faq .faq-dash {
    padding: 1.5rem 1.55rem 1.65rem;
  }

  .page-faq .faq-dash__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-help__inner {
    padding: 2.4rem 2.6rem 2.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }

  .page-faq .faq-step,
  .page-faq .faq-item,
  .page-faq .faq-filter__btn,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::before,
  .page-faq .faq-item__q::after {
    transition: none;
  }
}