.page-faq {
  --faq-accent: var(--spring-deep);
  --faq-accent-soft: #E1F3EF;
  --faq-ink-soft: var(--grey);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .guide-hero {
  position: relative;
  border-bottom: var(--line);
  background: linear-gradient(158deg, var(--mist) 0%, var(--paper) 64%);
  overflow: hidden;
}

.page-faq .guide-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: var(--cell) var(--cell);
  opacity: .5;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
}

.page-faq .guide-hero .container {
  position: relative;
}

.page-faq .guide-hero .breadcrumbs {
  padding-top: 20px;
  font-size: 13px;
}

.page-faq .guide-hero__inner {
  position: relative;
  display: grid;
  gap: 30px;
  padding-block: clamp(28px, 5vw, 56px) clamp(30px, 5vw, 64px);
}

.page-faq .guide-hero h1 {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 62px);
  line-height: 1.08;
  letter-spacing: -.02em;
  max-width: 17ch;
}

.page-faq .guide-hero__lead {
  margin: 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .guide-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .guide-hero__meta {
  display: grid;
  gap: 0;
  margin: 0;
  border: var(--line);
  background: rgba(255, 255, 255, .78);
  align-self: start;
}

.page-faq .guide-hero__stat {
  display: flex;
  flex-direction: column;
  padding: 14px 16px;
  border-top: var(--line);
}

.page-faq .guide-hero__stat:first-child {
  border-top: 0;
}

.page-faq .guide-hero__stat-label {
  order: 2;
  margin: 0;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--grey);
}

.page-faq .guide-hero__stat-num {
  order: 1;
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--brand);
}

/* ---------- 章节骨架 ---------- */
.page-faq .guide-section {
  border-bottom: var(--line);
  scroll-margin-top: 84px;
}

.page-faq .guide-section__inner {
  display: grid;
  gap: 18px;
  padding-block: clamp(34px, 5vw, 62px);
}

.page-faq .guide-section__rail {
  display: flex;
  align-items: center;
  gap: 10px;
  align-self: start;
  padding-top: 8px;
  border-top: 2px solid var(--blueprint);
}

.page-faq .guide-section__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--brand);
}

.page-faq .guide-section__rail-label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--grey);
}

.page-faq .guide-section__content {
  min-width: 0;
}

.page-faq .guide-section__head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 36px);
  line-height: 1.22;
  letter-spacing: -.01em;
}

.page-faq .guide-section__lead {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--grey);
}

/* ---------- 六步清单 ---------- */
.page-faq .guide-plan__body {
  --faq-done: 0;
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

.page-faq .guide-meter {
  border: var(--line);
  background: #fff;
  padding: 16px;
}

.page-faq .guide-meter__label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--grey);
}

.page-faq .guide-meter__track {
  position: relative;
  display: block;
  height: 8px;
  background: var(--mist);
  overflow: hidden;
}

.page-faq .guide-meter__fill {
  display: block;
  height: 100%;
  width: calc(var(--faq-done) * 16.6667%);
  background: linear-gradient(90deg, var(--faq-accent), var(--brand-bright));
  transition: width .3s var(--ease);
}

.page-faq .guide-meter__hint {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--grey);
}

.page-faq .guide-plan__body:has(#g-step-1:checked) { --faq-done: 1; }
.page-faq .guide-plan__body:has(#g-step-2:checked) { --faq-done: 2; }
.page-faq .guide-plan__body:has(#g-step-3:checked) { --faq-done: 3; }
.page-faq .guide-plan__body:has(#g-step-4:checked) { --faq-done: 4; }
.page-faq .guide-plan__body:has(#g-step-5:checked) { --faq-done: 5; }
.page-faq .guide-plan__body:has(#g-step-6:checked) { --faq-done: 6; }

.page-faq .guide-plan__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: var(--line);
}

.page-faq .guide-step {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 0 16px;
  padding: 20px 0 22px;
  border-bottom: var(--line);
}

.page-faq .guide-step::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--grid);
  transition: background .25s var(--ease);
}

.page-faq .guide-step__num {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: var(--line);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--blueprint);
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .guide-step__main {
  min-width: 0;
}

.page-faq .guide-step__title {
  margin: 4px 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .guide-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .guide-step__done {
  margin: 10px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--mist);
  font-size: 13px;
  line-height: 1.65;
  color: var(--grey);
}

.page-faq .guide-step__done strong {
  color: var(--blueprint);
  font-weight: 700;
}

.page-faq .guide-step__toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--grey);
  cursor: pointer;
  user-select: none;
}

.page-faq .guide-step__toggle input {
  appearance: none;
  -webkit-appearance: none;
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  margin: 0;
  border: 1px solid var(--grid);
  background: #fff;
  cursor: pointer;
}

.page-faq .guide-step__toggle input::after {
  content: "";
  width: 9px;
  height: 5px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(-45deg) translateY(-1px);
  opacity: 0;
}

.page-faq .guide-step__toggle input:checked {
  background: var(--faq-accent);
  border-color: var(--faq-accent);
}

.page-faq .guide-step__toggle input:checked::after {
  opacity: 1;
}

.page-faq .guide-step__toggle input:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.page-faq .guide-step:has(input:checked) .guide-step__num {
  background: var(--faq-accent);
  border-color: var(--faq-accent);
  color: #fff;
}

.page-faq .guide-step:has(input:checked)::before {
  background: var(--faq-accent);
}

.page-faq .guide-figure {
  margin: 0;
  border: var(--line);
  background: #fff;
}

.page-faq .guide-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .guide-figure__cap {
  padding: 8px 12px;
  border-top: var(--line);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--grey);
}

.page-faq .guide-figure--wide {
  margin-top: 24px;
}

/* ---------- 按人群 ---------- */
.page-faq .crowd-grid {
  display: grid;
  gap: 20px;
  margin-top: 26px;
}

.page-faq .crowd {
  padding-top: 14px;
  border-top: 3px solid var(--grid);
}

.page-faq .crowd--spring { border-top-color: var(--spring); }
.page-faq .crowd--summer { border-top-color: var(--summer); }
.page-faq .crowd--autumn { border-top-color: var(--autumn); }
.page-faq .crowd--winter { border-top-color: var(--winter); }

.page-faq .crowd__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--blueprint);
}

.page-faq .crowd__steps {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--brand);
}

.page-faq .crowd__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--grey);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .qa-grid {
  display: grid;
  gap: 30px;
  margin-top: 28px;
}

.page-faq .qa-group__title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--blueprint);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--blueprint);
}

.page-faq .qa-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--brand);
}

.page-faq .qa-item {
  border-bottom: var(--line);
  transition: background .2s var(--ease);
}

.page-faq .qa-item__q {
  position: relative;
  list-style: none;
  padding: 14px 28px 14px 12px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
}

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

.page-faq .qa-item__q::after {
  content: "+";
  position: absolute;
  top: 12px;
  right: 6px;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--brand);
}

.page-faq .qa-item[open] {
  background: var(--mist);
  box-shadow: inset 3px 0 0 var(--brand);
}

.page-faq .qa-item[open] .qa-item__q::after {
  content: "−";
}

.page-faq .qa-item__a {
  padding: 0 24px 16px 15px;
}

.page-faq .qa-item__a p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 排障速查表 ---------- */
.page-faq .trouble-wrap {
  margin-top: 24px;
  border: var(--line);
  background: #fff;
  overflow-x: auto;
}

.page-faq .trouble-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .trouble-table th {
  padding: 12px 14px;
  border-right: 1px solid rgba(255, 255, 255, .18);
  background: var(--blueprint);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-align: left;
  color: #fff;
}

.page-faq .trouble-table th:last-child {
  border-right: 0;
}

.page-faq .trouble-table td {
  padding: 13px 14px;
  border-top: var(--line);
  border-right: var(--line);
  vertical-align: top;
  line-height: 1.65;
  color: var(--grey);
}

.page-faq .trouble-table td:last-child {
  border-right: 0;
}

.page-faq .trouble-table td:first-child {
  font-weight: 700;
  color: var(--ink);
}

.page-faq .trouble-table tbody tr:nth-child(even) {
  background: var(--paper);
}

/* ---------- 人工协助 ---------- */
.page-faq .support {
  display: grid;
  margin-top: 26px;
  border: var(--line);
  background: #fff;
}

.page-faq .support__main {
  padding: clamp(18px, 3vw, 28px);
  border-bottom: var(--line);
}

.page-faq .support__list {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .support__label {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--grey);
}

.page-faq .support__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--blueprint);
  word-break: break-word;
}

.page-faq .support__side {
  padding: clamp(18px, 3vw, 28px);
  background: var(--mist);
}

.page-faq .support__side p {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .support__foot {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--grey);
}

.page-faq .support__foot a {
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .guide-hero__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .guide-hero__stat {
    border-top: 0;
    border-left: var(--line);
  }

  .page-faq .guide-hero__stat:first-child {
    border-left: 0;
  }
}

@media (min-width: 760px) {
  .page-faq .crowd-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px 32px;
  }

  .page-faq .qa-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 40px;
  }

  .page-faq .support {
    grid-template-columns: 1.05fr .95fr;
  }

  .page-faq .support__main {
    border-bottom: 0;
    border-right: var(--line);
  }
}

@media (min-width: 900px) {
  .page-faq .guide-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 40px;
  }

  .page-faq .guide-section__inner {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 40px;
  }

  .page-faq .guide-section__rail {
    position: sticky;
    top: 76px;
  }

  .page-faq .guide-plan__body {
    grid-template-columns: 340px minmax(0, 1fr);
    gap: 24px 40px;
    align-items: start;
  }

  .page-faq .guide-meter {
    grid-column: 1;
    grid-row: 1;
  }

  .page-faq .guide-figure {
    grid-column: 1;
    grid-row: 2;
    margin-top: 20px;
  }

  .page-faq .guide-plan__steps {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .page-faq .guide-figure--wide {
    max-width: 620px;
    margin-top: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition: none !important;
  }
}