.page-faq {
  background: var(--ink-800);
  color: var(--paper);
  font-family: var(--font-body);
  line-height: 1.75;
  font-size: var(--fs-16);
  overflow-wrap: break-word;
}

.page-faq .faq-wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.page-faq h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 4.2vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: 0.01em;
  margin: 0 0 12px;
  color: var(--paper);
}

.page-faq h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.35;
}

.page-faq p {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(16px, 3vw, 28px) 0 clamp(36px, 6vw, 68px);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(216, 162, 74, 0.16), transparent 60%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, var(--line-faint) 0 1px, transparent 1px 76px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 78%);
  pointer-events: none;
}

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

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-faq .faq-hero__kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.22em;
  color: var(--sand);
  border-left: 3px solid var(--coral);
  padding-left: 12px;
  margin-bottom: 16px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 7vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  margin: 0 0 22px;
  max-width: 20ch;
}

.page-faq .faq-hero__title span {
  display: block;
  color: var(--sand);
}

.page-faq .faq-hero__lead {
  max-width: 62ch;
  font-size: var(--fs-18);
  line-height: 1.8;
  color: rgba(243, 237, 227, 0.82);
  margin-bottom: 30px;
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
}

.page-faq .faq-hero__stats li {
  border-left: 2px solid var(--line-strong);
  padding-left: 14px;
  min-width: 0;
}

.page-faq .faq-hero__stats strong {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.45rem, 4vw, 2rem);
  line-height: 1.1;
  color: var(--sand);
}

.page-faq .faq-hero__stats span {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-14);
  line-height: 1.5;
  color: var(--stone);
}

/* ---------- 筛选 ---------- */
.page-faq .faq-lookup {
  background: var(--ink-900);
  border-bottom: 1px solid var(--line-soft);
  padding: 22px 0;
}

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

.page-faq .faq-lookup__label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--sand);
  margin-bottom: 10px;
}

.page-faq .faq-lookup__input {
  width: 100%;
  box-sizing: border-box;
  background: var(--glass);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-s);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.5;
  padding: 14px 16px;
  transition: border-color 0.2s var(--ease);
}

.page-faq .faq-lookup__input::placeholder {
  color: var(--stone);
}

.page-faq .faq-lookup__input:focus-visible {
  outline: 2px solid var(--sand);
  outline-offset: 2px;
  border-color: var(--sand);
}

.page-faq .faq-lookup__status {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  color: var(--lake);
}

.page-faq .faq-lookup__status:empty {
  display: none;
}

/* ---------- 分诊 ---------- */
.page-faq .faq-triage {
  padding: clamp(40px, 7vw, 76px) 0;
}

.page-faq .faq-triage__head {
  max-width: 62ch;
  margin-bottom: 24px;
}

.page-faq .faq-triage__head p {
  color: rgba(243, 237, 227, 0.78);
}

.page-faq .faq-triage__figure {
  margin: 0 0 26px;
  background: var(--ink-900);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-faq .faq-triage__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-faq .faq-triage__figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-faint);
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--stone);
}

.page-faq .faq-triage__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .faq-triage__item {
  padding: 20px 18px 18px;
  background: linear-gradient(158deg, rgba(46, 66, 71, 0.9), rgba(16, 23, 25, 0.86));
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--lake);
  border-radius: var(--radius-m);
  min-width: 0;
}

.page-faq .faq-triage__item:nth-child(1) { border-left-color: var(--lake); }
.page-faq .faq-triage__item:nth-child(2) { border-left-color: var(--green); }
.page-faq .faq-triage__item:nth-child(3) { border-left-color: var(--coral); }
.page-faq .faq-triage__item:nth-child(4) { border-left-color: var(--wine); }

.page-faq .faq-triage__code {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-32);
  line-height: 1;
  color: var(--sand);
  opacity: 0.72;
  margin-bottom: 10px;
}

.page-faq .faq-triage__item h3 {
  font-size: var(--fs-18);
  margin: 0 0 8px;
  color: var(--paper);
}

.page-faq .faq-triage__item p {
  font-size: var(--fs-16);
  line-height: 1.7;
  color: rgba(243, 237, 227, 0.76);
}

.page-faq .faq-triage__go {
  display: inline-block;
  margin-top: 14px;
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--lake);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .faq-triage__go:hover,
.page-faq .faq-triage__go:focus-visible {
  color: var(--sand);
}

/* ---------- 双栏 + 时间轴 ---------- */
.page-faq .faq-lanes {
  padding-bottom: clamp(40px, 7vw, 76px);
}

.page-faq .faq-lanes__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-faq .faq-rail {
  background: rgba(46, 66, 71, 0.52);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  padding: 16px;
}

.page-faq .faq-rail__title {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--sand);
  margin-bottom: 12px;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  color: var(--paper);
  font-size: var(--fs-14);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: rgba(216, 162, 74, 0.12);
  border-color: var(--line-strong);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--sand);
}

.page-faq .faq-rail__note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-size: var(--fs-14);
  line-height: 1.65;
  color: var(--stone);
}

.page-faq .faq-track {
  padding-bottom: clamp(36px, 5vw, 56px);
}

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

.page-faq .faq-track__head {
  border-top: 2px solid var(--sand);
  padding-top: 18px;
  margin-bottom: 20px;
  max-width: 64ch;
}

.page-faq .faq-track__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--lake);
  border: 1px solid rgba(62, 142, 158, 0.55);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 14px;
}

.page-faq .faq-track__tag--coral {
  color: var(--coral);
  border-color: rgba(232, 106, 74, 0.55);
}

.page-faq .faq-track__head p {
  color: rgba(243, 237, 227, 0.78);
}

.page-faq .faq-track__figure {
  margin: 0 0 8px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--ink-900);
}

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

.page-faq .faq-track__figure figcaption {
  padding: 10px 16px;
  border-top: 1px solid var(--line-faint);
  font-size: var(--fs-14);
  color: var(--stone);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-faq .faq-steps::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--sand), rgba(216, 162, 74, 0.1));
  opacity: 0.55;
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 22px 42px 22px 0;
  border-bottom: 1px dashed var(--line-faint);
}

.page-faq .faq-step:nth-child(3n) {
  border-bottom: 2px solid var(--line-strong);
  padding-bottom: 34px;
  margin-bottom: 6px;
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-18);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--sand);
  padding-top: 3px;
}

.page-faq .faq-step__body {
  min-width: 0;
}

.page-faq .faq-step__title {
  font-size: var(--fs-18);
  margin: 0 0 6px;
  color: var(--paper);
}

.page-faq .faq-step__body p {
  font-size: var(--fs-16);
  line-height: 1.75;
  color: rgba(243, 237, 227, 0.76);
  max-width: 60ch;
}

.page-faq .faq-step__marker {
  position: absolute;
  top: 22px;
  right: 0;
  display: block;
  cursor: pointer;
}

.page-faq .faq-step__marker input {
  -webkit-appearance: none;
  appearance: none;
  display: block;
  width: 22px;
  height: 22px;
  border: 1.5px solid var(--line-strong);
  border-radius: 50%;
  background: var(--ink-900);
  cursor: pointer;
  position: relative;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-step__marker input::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 3px;
  width: 4px;
  height: 9px;
  border-right: 2px solid var(--ink-900);
  border-bottom: 2px solid var(--ink-900);
  transform: rotate(42deg) scale(0);
  transition: transform 0.18s var(--ease);
}

.page-faq .faq-step__marker input:checked {
  background: var(--green);
  border-color: var(--green);
}

.page-faq .faq-step__marker input:checked::after {
  transform: rotate(42deg) scale(1);
}

.page-faq .faq-step__marker input:focus-visible {
  outline: 2px solid var(--sand);
  outline-offset: 3px;
}

.page-faq .faq-step:has(input:checked) .faq-step__title {
  color: var(--green);
}

/* ---------- 大屏与电脑 ---------- */
.page-faq .faq-devices {
  padding: clamp(40px, 7vw, 72px) 0;
  background: linear-gradient(180deg, var(--indigo) 0%, rgba(75, 63, 114, 0.42) 100%);
  border-top: 1px solid rgba(243, 237, 227, 0.14);
  border-bottom: 1px solid rgba(243, 237, 227, 0.14);
}

.page-faq .faq-devices__lead {
  max-width: 62ch;
  color: rgba(243, 237, 227, 0.84);
}

.page-faq .faq-devices__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 26px 0 24px;
}

.page-faq .faq-devices__card {
  padding: 20px 18px;
  background: rgba(16, 23, 25, 0.55);
  border: 1px solid rgba(243, 237, 227, 0.16);
  border-radius: var(--radius-m);
  min-width: 0;
}

.page-faq .faq-devices__card h3 {
  font-size: var(--fs-18);
  margin: 0 0 10px;
  color: var(--sand);
}

.page-faq .faq-devices__card p {
  font-size: var(--fs-16);
  line-height: 1.75;
  color: rgba(243, 237, 227, 0.8);
}

.page-faq .faq-devices__hint {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed rgba(243, 237, 227, 0.2);
  font-size: var(--fs-14);
  color: rgba(243, 237, 227, 0.62);
}

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

/* ---------- 自检清单 ---------- */
.page-faq .faq-checklist {
  padding: clamp(40px, 7vw, 72px) 0;
  background: var(--paper);
  color: var(--ink-900);
}

.page-faq .faq-checklist h2 {
  color: var(--ink-900);
}

.page-faq .faq-checklist__lead {
  max-width: 62ch;
  color: rgba(16, 23, 25, 0.74);
}

.page-faq .faq-checklist__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-faq .faq-checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(16, 23, 25, 0.14);
  font-size: var(--fs-16);
  line-height: 1.65;
  color: var(--ink-800);
  cursor: pointer;
}

.page-faq .faq-checklist__item input {
  -webkit-appearance: none;
  appearance: none;
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  margin: 3px 0 0;
  border: 1.5px solid rgba(16, 23, 25, 0.45);
  border-radius: var(--radius-s);
  background: transparent;
  cursor: pointer;
  position: relative;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-checklist__item input::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 1px;
  width: 4px;
  height: 9px;
  border-right: 2px solid var(--paper);
  border-bottom: 2px solid var(--paper);
  transform: rotate(42deg) scale(0);
  transition: transform 0.18s var(--ease);
}

.page-faq .faq-checklist__item input:checked {
  background: var(--green);
  border-color: var(--green);
}

.page-faq .faq-checklist__item input:checked::after {
  transform: rotate(42deg) scale(1);
}

.page-faq .faq-checklist__item input:focus-visible {
  outline: 2px solid var(--ink-800);
  outline-offset: 3px;
}

.page-faq .faq-checklist__item:has(input:checked) span {
  color: rgba(16, 23, 25, 0.55);
  text-decoration: line-through;
  text-decoration-thickness: 1px;
}

/* ---------- 联系 ---------- */
.page-faq .faq-help {
  padding: clamp(40px, 7vw, 76px) 0;
  background: linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
}

.page-faq .faq-help__lead {
  max-width: 62ch;
  color: rgba(243, 237, 227, 0.8);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 26px;
}

.page-faq .faq-help__list {
  list-style: none;
  counter-reset: faqhelp;
  margin: 0;
  padding: 0;
}

.page-faq .faq-help__list li {
  counter-increment: faqhelp;
  position: relative;
  padding: 13px 0 13px 44px;
  border-bottom: 1px solid var(--line-faint);
  font-size: var(--fs-16);
  line-height: 1.7;
  color: rgba(243, 237, 227, 0.86);
}

.page-faq .faq-help__list li::before {
  content: counter(faqhelp, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 13px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--sand);
}

.page-faq .faq-help__card {
  padding: 22px 18px;
  background: rgba(46, 66, 71, 0.55);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--coral);
  border-radius: var(--radius-m);
}

.page-faq .faq-help__contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-help__contact li {
  display: grid;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .faq-help__contact li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-faq .faq-help__key {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--sand);
}

.page-faq .faq-help__val {
  font-size: var(--fs-16);
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-help__note {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line-faint);
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--stone);
}

.page-faq .faq-help__foot {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--stone);
}

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

.page-faq .faq-help__foot a:hover,
.page-faq .faq-help__foot a:focus-visible {
  color: var(--sand);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-triage__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

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

  .page-faq .faq-help__contact li {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-lanes__inner {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    padding: 20px 18px;
  }

  .page-faq .faq-rail__list {
    gap: 2px;
  }

  .page-faq .faq-rail__link {
    border: none;
    border-left: 2px solid transparent;
    border-radius: 0;
    padding: 10px 8px;
    white-space: normal;
    font-size: var(--fs-16);
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    background: rgba(216, 162, 74, 0.1);
    border-left-color: var(--sand);
  }

  .page-faq .faq-step {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 18px;
    padding-right: 54px;
  }

  .page-faq .faq-steps::before {
    left: 26px;
  }

  .page-faq .faq-step__num {
    font-size: var(--fs-24);
  }

  .page-faq .faq-step__marker input {
    width: 26px;
    height: 26px;
  }

  .page-faq .faq-step__marker input::after {
    left: 8px;
    top: 4px;
    width: 5px;
    height: 10px;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-lookup__input,
  .page-faq .faq-rail__link,
  .page-faq .faq-step__marker input,
  .page-faq .faq-step__marker input::after,
  .page-faq .faq-checklist__item input,
  .page-faq .faq-checklist__item input::after {
    transition: none;
  }
}