.page-faq {
  --faq-offset: clamp(0px, 3.4vw, 62px);
  --faq-stair-gap: clamp(14px, 2vw, 22px);
  --faq-accent: var(--green);
  position: relative;
  isolation: isolate;
  background-color: var(--ink-950);
  padding-bottom: clamp(56px, 8vw, 108px);
  overflow-x: clip;
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(79, 209, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 209, 255, .05) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 58%, transparent 100%);
  mask-image: linear-gradient(180deg, #000 0%, #000 58%, transparent 100%);
  pointer-events: none;
}

.page-faq .shell {
  position: relative;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(96px, 13vw, 168px) 0 clamp(40px, 6vw, 72px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line) 20%, var(--line) 80%, transparent);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 52px);
  margin-top: clamp(22px, 3.5vw, 42px);
}

.page-faq .faq-hero__index {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--green);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-size: clamp(2rem, 5.6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--white);
  max-width: 15ch;
}

.page-faq .faq-hero__lead {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.15vw, 1.14rem);
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-hero__note {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--muted);
  padding-left: 14px;
  border-left: 2px solid rgba(22, 208, 124, .5);
}

.page-faq .faq-hero__aside {
  position: relative;
  background: linear-gradient(160deg, rgba(18, 36, 56, .92), rgba(10, 20, 32, .92));
  padding: clamp(22px, 3vw, 30px);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
  box-shadow: inset 0 1px 0 rgba(79, 209, 255, .18);
}

.page-faq .faq-hero__aside::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background: var(--green);
}

.page-faq .faq-hero__aside-label {
  margin: 0 0 16px;
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-hero__aside-list {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 13px;
}

.page-faq .faq-hero__aside-row {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: .88rem;
  line-height: 1.65;
  color: var(--text);
}

.page-faq .faq-hero__aside-row .status-dot {
  margin-top: 7px;
  flex: none;
}

.page-faq .faq-hero__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 区块通用 ---------- */

.page-faq .faq-section {
  position: relative;
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-faq .faq-section--gate,
.page-faq .faq-section--loading {
  background: linear-gradient(180deg, rgba(13, 27, 42, .72), rgba(10, 20, 32, 0) 78%);
}

.page-faq .faq-head .section-head__title {
  position: relative;
  display: inline-block;
  padding-bottom: 12px;
}

.page-faq .faq-head .section-head__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 3px;
  background: var(--green);
}

.page-faq .faq-section--login .faq-head .section-head__title::after {
  background: var(--amber);
}

.page-faq .faq-section--loading .faq-head .section-head__title::after {
  background: var(--orange);
}

.page-faq .section-head__lead {
  max-width: 60ch;
}

/* ---------- 判断区 ---------- */

.page-faq .faq-gate {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-gate__figure {
  background: radial-gradient(circle at 20% 40%, rgba(79, 209, 255, .09), transparent 62%);
  padding: 4px;
}

.page-faq .faq-gate__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-gate__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-faq .faq-gate__link {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  grid-template-areas:
    "tag name"
    "tag hint"
    "tag go";
  align-items: center;
  column-gap: 14px;
  padding: 18px 18px 18px 0;
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
  position: relative;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-gate__link::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(22, 208, 124, .12), transparent 70%);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
  pointer-events: none;
}

.page-faq .faq-gate__link:hover {
  transform: translateY(-2px);
}

.page-faq .faq-gate__link:hover::after,
.page-faq .faq-gate__link:focus-visible::after {
  opacity: 1;
}

.page-faq .faq-gate__link:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

.page-faq .faq-gate__tag {
  grid-area: tag;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-950);
  background: var(--green);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}

.page-faq .faq-gate__item--b .faq-gate__tag {
  background: var(--amber);
}

.page-faq .faq-gate__item--c .faq-gate__tag {
  background: var(--orange);
}

.page-faq .faq-gate__name {
  grid-area: name;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.5;
}

.page-faq .faq-gate__hint {
  grid-area: hint;
  margin-top: 4px;
  font-size: .84rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-gate__go {
  grid-area: go;
  margin-top: 8px;
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-gate__media {
  margin-top: clamp(26px, 4vw, 44px);
}

/* ---------- 阶梯卡片 ---------- */

.page-faq .faq-stair {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--faq-stair-gap);
}

.page-faq .faq-stair__cell {
  margin-inline-start: 0;
}

.page-faq .faq-step {
  --faq-accent: var(--green);
  position: relative;
  background: linear-gradient(135deg, rgba(18, 36, 56, .94), rgba(11, 22, 36, .96));
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
  box-shadow: inset 0 1px 0 rgba(79, 209, 255, .14);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--faq-accent), rgba(0, 0, 0, 0) 82%);
}

.page-faq .faq-step--b {
  --faq-accent: var(--amber);
}

.page-faq .faq-step--c {
  --faq-accent: var(--orange);
}

.page-faq .faq-step:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 1px 0 rgba(79, 209, 255, .22), 0 12px 30px -18px rgba(0, 0, 0, .9);
}

.page-faq .faq-step__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px 18px 22px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-step__summary:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: -3px;
}

.page-faq .faq-step__id {
  flex: none;
  font-size: .82rem;
  letter-spacing: .1em;
  color: var(--faq-accent);
}

.page-faq .faq-step__scene {
  flex: 1 1 auto;
  min-width: 0;
  font-size: .96rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
}

.page-faq .faq-step__mark {
  flex: none;
  position: relative;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line);
}

.page-faq .faq-step__mark::before,
.page-faq .faq-step__mark::after {
  content: "";
  position: absolute;
  background: var(--faq-accent);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-step__mark::before {
  left: 5px;
  right: 5px;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .faq-step__mark::after {
  top: 5px;
  bottom: 5px;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}

.page-faq .faq-step[open] .faq-step__mark::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-step__body {
  padding: 0 22px 22px 22px;
  border-top: 1px solid var(--line-soft);
  margin-top: 2px;
  padding-top: 18px;
}

.page-faq .faq-step__title {
  margin: 0 0 12px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: .01em;
}

.page-faq .faq-step__list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
  display: grid;
  gap: 10px;
}

.page-faq .faq-step__list li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 30px;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--text);
  max-width: 52ch;
}

.page-faq .faq-step__list li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--faq-accent);
  opacity: .85;
}

.page-faq .faq-step__signal {
  margin: 16px 0 0;
  display: flex;
  gap: 9px;
  align-items: flex-start;
  font-size: .84rem;
  line-height: 1.7;
  color: var(--muted);
  padding: 10px 12px;
  background: rgba(22, 208, 124, .06);
  border-left: 2px solid rgba(22, 208, 124, .4);
}

.page-faq .faq-step__signal .status-dot {
  margin-top: 7px;
  flex: none;
}

.page-faq .faq-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 209, 255, .45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-inline-link:hover {
  color: var(--white);
  border-bottom-color: var(--white);
}

.page-faq .faq-inline-link:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

.page-faq .faq-entry__media {
  margin-top: clamp(28px, 4vw, 46px);
}

.page-faq .faq-alert-line {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--text);
  padding: 14px 16px;
  background: rgba(255, 91, 46, .08);
  border-left: 2px solid var(--orange);
}

.page-faq .faq-alert-line .status-dot {
  margin-top: 7px;
  flex: none;
}

/* ---------- 反馈区 ---------- */

.page-faq .faq-report {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-faq .faq-report__list-panel {
  background: linear-gradient(165deg, rgba(18, 36, 56, .9), rgba(11, 22, 36, .95));
  padding: clamp(22px, 3vw, 30px);
}

.page-faq .faq-report__label {
  margin: 0 0 18px;
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--amber);
}

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

.page-faq .faq-report__list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .faq-report__list li:last-child {
  border-bottom: 0;
}

.page-faq .faq-report__key {
  font-size: .84rem;
  font-weight: 600;
  color: var(--white);
}

.page-faq .faq-report__val {
  font-size: .84rem;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq .faq-report__send-panel {
  background: linear-gradient(160deg, rgba(22, 208, 124, .1), rgba(10, 20, 32, .55) 58%);
  border-left: 3px solid var(--green);
  padding: clamp(22px, 3vw, 30px);
}

.page-faq .faq-report__send-title {
  margin: 0 0 14px;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--white);
}

.page-faq .faq-report__send-text {
  margin: 0 0 12px;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--text);
  max-width: 42ch;
}

.page-faq .faq-report__send-text .mono {
  color: var(--amber);
}

.page-faq .faq-report__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 16px;
}

.page-faq .faq-report__hint {
  margin: 0;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--muted);
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-report__list li {
    grid-template-columns: minmax(120px, 168px) minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }

  .page-faq .faq-step__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(280px, 4fr);
    gap: clamp(36px, 5vw, 76px);
    align-items: end;
  }

  .page-faq .faq-gate {
    grid-template-columns: minmax(0, 6fr) minmax(320px, 5fr);
    align-items: center;
  }

  .page-faq .faq-stair__cell:nth-child(2) {
    margin-inline-start: var(--faq-offset);
  }

  .page-faq .faq-stair__cell:nth-child(3) {
    margin-inline-start: calc(var(--faq-offset) * 1.6);
  }

  .page-faq .faq-stair__cell:nth-child(4) {
    margin-inline-start: calc(var(--faq-offset) * 2.2);
  }

  .page-faq .faq-report {
    grid-template-columns: minmax(0, 6fr) minmax(320px, 5fr);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__title {
    max-width: 13ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-gate__link,
  .page-faq .faq-step__mark::before,
  .page-faq .faq-step__mark::after,
  .page-faq .faq-inline-link {
    transition: color var(--dur) linear, background-color var(--dur) linear;
    transform: none;
  }

  .page-faq .faq-step:hover,
  .page-faq .faq-gate__link:hover {
    transform: none;
  }
}