.page-faq {
  --faq-hair: var(--ice-grid);
  --faq-hair-dark: rgba(127, 179, 162, 0.34);
  --faq-cut: 20px;
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-top: 20px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  background: var(--pitch);
  color: var(--chalk);
  padding-block: clamp(36px, 6vw, 76px) clamp(32px, 5vw, 60px);
  overflow: hidden;
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: 28px;
}

.page-faq .annot--on-dark {
  color: var(--pitch-moss);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  margin: 0;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(2.2rem, 6.4vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--chalk);
  margin: 16px 0 0;
}

.page-faq .faq-hero__lead {
  max-width: 46ch;
  margin: 16px 0 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--pitch-moss);
}

.page-faq .faq-hero__side {
  display: grid;
  gap: 12px;
  border-top: 1px solid var(--faq-hair-dark);
  padding-top: 18px;
}

.page-faq .faq-hero__stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--pitch-moss);
}

.page-faq .faq-hero__stat b {
  font-family: var(--font-num);
  font-weight: 500;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  line-height: 1;
  color: var(--sig);
  flex: none;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: 8fr 4fr;
    gap: 48px;
    align-items: end;
  }
  .page-faq .faq-hero__side {
    border-top: 0;
    border-left: 1px solid var(--faq-hair-dark);
    padding: 0 0 0 26px;
  }
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding-block: 8px 96px;
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 56px;
    padding-block: 40px 120px;
  }
}

/* ---------- 左侧问题索引 ---------- */
.page-faq .faq-index {
  position: sticky;
  top: 56px;
  z-index: 8;
  background: var(--ice-bg);
  border-bottom: 1px solid var(--faq-hair);
  padding-block: 10px;
  margin-inline: calc(-1 * var(--pad));
  padding-inline: var(--pad);
}

.page-faq .faq-index__label {
  display: none;
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  white-space: nowrap;
  padding: 6px 10px;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--ice-deep);
  text-decoration: none;
  background: var(--chalk);
  border: 1px solid var(--faq-hair);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  transition: background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

.page-faq .faq-index__link span {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--graphite);
}

.page-faq .faq-index__link.is-active {
  background: var(--ice);
  border-color: var(--ice);
  color: var(--chalk);
}

.page-faq .faq-index__link.is-active span {
  color: var(--chalk);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--ice);
  outline-offset: 2px;
}

@media (min-width: 900px) {
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    align-self: start;
    background: transparent;
    border-bottom: 0;
    padding-block: 0;
    margin-inline: 0;
    padding-inline: 0;
    z-index: 2;
  }
  .page-faq .faq-index__label {
    display: block;
    font-family: var(--font-num);
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--graphite);
    margin: 0 0 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--faq-hair);
  }
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }
  .page-faq .faq-index__link {
    width: 100%;
    background: transparent;
    border: 0;
    border-left: 2px solid transparent;
    clip-path: none;
    padding: 9px 12px;
    color: var(--graphite);
    transition: color 180ms ease, border-color 180ms ease;
  }
  .page-faq .faq-index__link.is-active {
    background: transparent;
    color: var(--ice-deep);
    border-left-color: var(--ice);
  }
  .page-faq .faq-index__link.is-active span {
    color: var(--ice);
  }
}

/* ---------- 章节 ---------- */
.page-faq .faq-answers {
  min-width: 0;
}

.page-faq .faq-sec {
  padding-block: clamp(30px, 5vw, 52px);
  border-top: 1px solid var(--faq-hair);
  scroll-margin-top: 128px;
}

.page-faq .faq-sec:first-child {
  border-top: 0;
  padding-top: 24px;
}

@media (min-width: 900px) {
  .page-faq .faq-sec {
    scroll-margin-top: 120px;
  }
  .page-faq .faq-sec:first-child {
    padding-top: 0;
  }
}

.page-faq .faq-sec__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
}

.page-faq .faq-sec__num {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--sig-deep);
  flex: none;
}

.page-faq .faq-sec__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
}

.page-faq .faq-sec__lead {
  max-width: 62ch;
  margin: 0 0 20px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--graphite);
}

.page-faq .faq-sec p {
  max-width: 62ch;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .faq-inline-note {
  max-width: 62ch;
  margin: 20px 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--graphite);
  border-left: 2px solid var(--ice);
  padding-left: 14px;
}

.page-faq .faq-inline-note a {
  color: var(--ice-deep);
  text-underline-offset: 3px;
}

.page-faq .faq-inline-note a:hover {
  color: var(--sig-deep);
}

/* ---------- 入门三问 ---------- */
.page-faq .faq-quick {
  margin: 0;
}

.page-faq .faq-quick__row {
  display: grid;
  gap: 6px;
  padding-block: 16px;
  border-bottom: 1px dashed var(--faq-hair);
}

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

.page-faq .faq-quick dt {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 1.0625rem;
  line-height: 1.4;
  color: var(--ice-deep);
}

.page-faq .faq-quick dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink);
}

@media (min-width: 720px) {
  .page-faq .faq-quick__row {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 24px;
}

.page-faq .faq-figure--side {
  margin-bottom: 0;
}

.page-faq .figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.72);
}

.page-faq .figure__cap {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.65;
  color: var(--graphite);
  margin-top: 10px;
  border-top: 1px dashed var(--faq-hair);
  padding-top: 8px;
}

/* ---------- 术语 ---------- */
.page-faq .faq-term-tools {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 14px;
}

.page-faq .faq-term-group {
  margin-top: 26px;
}

.page-faq .faq-term-group__title {
  font-family: var(--font-num);
  font-weight: 400;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ice-deep);
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .term {
  border-bottom: 1px dashed var(--faq-hair);
}

.page-faq .term__summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 12px 6px 12px 20px;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .term__summary::before {
  content: "+";
  position: absolute;
  left: 0;
  top: 11px;
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--ice);
}

.page-faq .term[open] > .term__summary::before {
  content: "−";
}

.page-faq .term__summary:focus-visible {
  outline: 2px solid var(--ice);
  outline-offset: 2px;
}

.page-faq .term__body {
  padding: 0 6px 16px 20px;
}

.page-faq .term__body p {
  max-width: 58ch;
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--graphite);
  border-left: 2px solid var(--ice);
  padding-left: 14px;
}

/* ---------- 指标读取步骤 ---------- */
.page-faq .faq-steps-layout {
  display: grid;
  gap: 30px;
}

@media (min-width: 1000px) {
  .page-faq .faq-steps-layout {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
    gap: 48px;
    align-items: start;
  }
}

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

.page-faq .faq-step {
  display: grid;
  gap: 10px;
  padding-block: 20px;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-step:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-step__num {
  font-family: var(--font-num);
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1;
  color: var(--ice);
}

.page-faq .faq-step__body h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1.3;
  color: var(--ink);
  margin: 0 0 6px;
}

.page-faq .faq-step__body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--graphite);
}

@media (min-width: 640px) {
  .page-faq .faq-step {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 24px;
  }
}

/* ---------- 检索操作 ---------- */
.page-faq .faq-op-grid {
  display: grid;
  gap: 18px;
}

@media (min-width: 760px) {
  .page-faq .faq-op-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 24px;
  }
  .page-faq .faq-op-card:nth-child(2) {
    transform: translateY(16px);
  }
  .page-faq .faq-op-card:nth-child(3) {
    transform: translateY(-6px);
  }
}

.page-faq .faq-op-card {
  background: var(--chalk);
  border: 1px solid var(--faq-hair);
  padding: 20px 20px 22px;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-faq .faq-op-card--warn {
  background: var(--sig-pale);
  border-color: #E8B694;
}

.page-faq .faq-op-card h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.3;
  color: var(--ice-deep);
  margin: 0;
}

.page-faq .faq-op-card--warn h3 {
  color: var(--sig-deep);
}

.page-faq .faq-op-card ul {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq .faq-op-card li {
  position: relative;
  padding-left: 16px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-op-card li + li {
  margin-top: 4px;
}

.page-faq .faq-op-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 1px;
  background: var(--ice);
}

.page-faq .faq-op-card--warn li::before {
  background: var(--sig-deep);
}

/* ---------- 故障排查 ---------- */
.page-faq .faq-faults {
  margin-top: 6px;
}

.page-faq .faq-fault {
  background: var(--chalk);
  border: 1px solid var(--faq-hair);
  border-bottom: 0;
}

.page-faq .faq-fault:last-of-type {
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-fault > .term__summary {
  padding: 15px 18px;
}

.page-faq .faq-fault > .term__summary::before {
  position: static;
  top: auto;
  left: auto;
  display: inline-block;
  width: 16px;
  margin-right: 8px;
}

.page-faq .faq-fault > .term__body {
  padding: 0 18px 18px 42px;
}

.page-faq .faq-checks {
  margin: 0;
  padding-left: 20px;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--graphite);
}

.page-faq .faq-checks li + li {
  margin-top: 2px;
}

/* ---------- 咨询收口 ---------- */
.page-faq .faq-contact {
  margin-top: 20px;
  padding: clamp(22px, 4vw, 34px);
  background: var(--pitch-panel);
  color: var(--chalk);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.page-faq .faq-contact h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
  color: var(--chalk);
  margin: 0 0 12px;
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.page-faq .faq-contact__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--chalk);
}

.page-faq .faq-contact__list li + li {
  margin-top: 4px;
}

.page-faq .faq-contact__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 1px;
  background: var(--sig);
}

.page-faq .faq-contact__meta {
  max-width: 56ch;
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.8;
  color: var(--pitch-moss);
}

.page-faq .faq-contact__act {
  margin: 18px 0 0;
}

.page-faq .faq-contact__act .btn {
  display: inline-block;
  text-decoration: none;
}

/* ---------- 入场 ---------- */
.page-faq [data-reveal] {
  opacity: 1;
}

@media (prefers-reduced-motion: no-preference) {
  .page-faq [data-reveal] {
    opacity: 0.4;
    transform: translateY(10px);
    transition: opacity 240ms ease, transform 240ms ease;
  }
  .page-faq [data-reveal].is-in {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal],
  .page-faq [data-reveal].is-in {
    opacity: 1;
    transform: none;
    transition: none;
  }
}