.page-faq {
  --faq-line-soft: var(--line-soft);
  --faq-cyan-soft: rgba(0, 229, 199, 0.14);
  background: var(--ink-900);
  color: var(--mist);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(32px, 7vw, 64px)) 0 clamp(32px, 6vw, 56px);
  border-bottom: 1px solid var(--line);
  background: var(--ink-900);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -18%;
  width: 62%;
  height: 170%;
  background: linear-gradient(180deg, var(--faq-cyan-soft), rgba(0, 229, 199, 0));
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: min(320px, 52%);
  height: 3px;
  background: var(--orange);
}

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

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-faq .breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  text-decoration: underline;
}

.page-faq .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq h1 {
  margin: 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 7vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--cream);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__meta li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

/* ---------- 状态灯 ---------- */
.page-faq .faq-dot {
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 229, 199, 0.16);
}

.page-faq .faq-dot--orange {
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 44, 0.18);
}

.page-faq .faq-dot--slate {
  background: var(--slate);
  box-shadow: 0 0 0 3px rgba(143, 163, 184, 0.16);
}

/* ---------- 布局骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 48px);
  padding-top: clamp(32px, 5vw, 56px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-rail,
.page-faq .faq-canvas {
  min-width: 0;
}

.page-faq .faq-rail__panel {
  padding-top: 14px;
  border-top: 2px solid var(--cyan);
}

.page-faq .faq-rail__status {
  margin-top: 24px;
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

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

.page-faq .faq-toc li {
  counter-increment: toc;
}

.page-faq .faq-toc li + li {
  border-top: 1px solid var(--line-soft);
}

.page-faq .toc-link {
  display: block;
  padding: 11px 10px 11px 12px;
  border-left: 2px solid transparent;
  color: var(--slate);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .toc-link::before {
  content: counter(toc, decimal-leading-zero);
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-faq .toc-link:hover,
.page-faq .toc-link:focus-visible {
  color: var(--mist);
}

.page-faq .toc-link.is-active {
  border-left-color: var(--cyan);
  background: rgba(0, 229, 199, 0.07);
  color: var(--cyan);
}

.page-faq .toc-link.is-active::before {
  color: var(--cyan);
}

.page-faq .faq-status {
  display: grid;
  gap: 11px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-status li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--slate);
}

.page-faq .faq-status .faq-dot {
  margin-top: 6px;
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  padding-top: clamp(32px, 5vw, 52px);
  border-top: 1px solid var(--line-soft);
}

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

.page-faq .faq-section + .faq-section {
  margin-top: clamp(36px, 6vw, 64px);
}

.page-faq .faq-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-head__num {
  flex: none;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-faq .faq-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  color: var(--cream);
}

.page-faq .faq-head__desc {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 三步卡片 ---------- */
.page-faq .step-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .step-card {
  position: relative;
  overflow: hidden;
  padding: 26px 22px 24px;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .step-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--cyan);
}

.page-faq .step-card:nth-child(2)::before {
  background: var(--blue);
}

.page-faq .step-card:nth-child(3)::before {
  background: var(--orange);
}

.page-faq .step-card__num {
  position: absolute;
  top: 6px;
  right: 14px;
  font-family: var(--font-mono);
  font-size: 46px;
  line-height: 1;
  letter-spacing: -0.05em;
  color: rgba(232, 238, 244, 0.09);
}

.page-faq .step-card__title {
  position: relative;
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-faq .step-card p {
  position: relative;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .step-card__list {
  position: relative;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .step-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .step-card__list li + li {
  margin-top: 6px;
}

.page-faq .step-card__list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--cyan);
}

/* ---------- 图形区 ---------- */
.page-faq .faq-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  margin: 0;
  padding: 18px 2px;
  border: 0;
  background: transparent;
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  text-align: left;
  cursor: pointer;
}

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

.page-faq .faq-q__sign {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 5px;
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 18px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-q__sign::after {
  transform: rotate(90deg);
  transition: transform 0.22s ease;
}

.page-faq .faq-item.is-open .faq-q__sign::after {
  transform: rotate(0deg);
}

.page-faq .faq-item.is-open .faq-q {
  color: var(--cyan);
}

.page-faq .faq-a {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.32s ease, opacity 0.25s ease;
}

.page-faq .faq-item.is-open .faq-a {
  max-height: 760px;
  opacity: 1;
}

.page-faq .faq-a__inner {
  max-width: 68ch;
  padding: 0 2px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-a__inner p {
  margin: 0 0 10px;
}

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

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

/* ---------- 排查流程 ---------- */
.page-faq .faq-flow {
  margin: 0 0 0 8px;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-faq .faq-flow__item {
  position: relative;
  padding: 0 0 26px 26px;
}

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

.page-faq .faq-flow__item::before {
  content: "";
  position: absolute;
  top: 5px;
  left: -5px;
  width: 9px;
  height: 9px;
  background: var(--ink-900);
  border: 1px solid var(--cyan);
}

.page-faq .faq-flow__item:last-child::before {
  border-color: var(--orange);
}

.page-faq .faq-flow__tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-flow__title {
  margin: 8px 0 8px;
  font-size: 17px;
  line-height: 1.45;
  color: var(--cream);
}

.page-faq .faq-flow__text {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .faq-note {
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--blue);
  background: var(--ink-800);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate);
}

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

/* ---------- 状态卡片 ---------- */
.page-faq .state-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .state-card {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .state-card__head {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .state-card__title {
  margin: 12px 0 8px;
  font-size: 17px;
  line-height: 1.45;
  color: var(--cream);
}

.page-faq .state-card p:not(.state-card__head) {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-section--last {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-contact {
  padding: clamp(26px, 4vw, 44px);
  border-left: 4px solid var(--orange);
  background: var(--cream);
  color: var(--brown);
}

.page-faq .faq-head--brown .faq-head__num {
  color: var(--red);
}

.page-faq .faq-head--brown .faq-head__title {
  color: var(--brown);
}

.page-faq .faq-head--brown .faq-head__desc {
  color: rgba(26, 20, 16, 0.72);
}

.page-faq .faq-contact__channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-faq .faq-channel {
  padding-top: 14px;
  border-top: 1px solid var(--line-cream);
}

.page-faq .faq-channel__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--red);
}

.page-faq .faq-channel__value {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.1vw, 18px);
  line-height: 1.5;
  color: var(--brown);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-faq .faq-channel__value a {
  color: var(--brown);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--red);
}

.page-faq .faq-channel__hint {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(26, 20, 16, 0.7);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-contact__channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 28px;
  }
}

@media (min-width: 768px) {
  .page-faq .step-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .state-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .faq-figure--wide {
    margin-left: clamp(0px, 4vw, 56px);
  }

  .page-faq .faq-flow__item {
    padding-left: 32px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }

  .page-faq h1 {
    max-width: 16ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-a,
  .page-faq .faq-q__sign::after,
  .page-faq .toc-link {
    transition: none;
  }
}