.page-faq {
  --faq-panel: var(--ink-700);
  --faq-line: var(--line-600);
  --faq-key: var(--amber-400);
  padding-block: clamp(1.25rem, 3vw, 2.25rem) clamp(3.5rem, 8vw, 7rem);
  color: var(--mist-100);
  overflow-x: clip;
}

.page-faq [hidden] {
  display: none;
}

.page-faq .breadcrumb {
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--slate-400);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--cyan-700);
}

.page-faq .breadcrumb a {
  color: var(--slate-400);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover {
  color: var(--cyan-400);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -2rem;
  right: 0;
  width: min(520px, 88vw);
  height: 380px;
  background:
    radial-gradient(circle at 68% 28%, rgba(53, 240, 208, 0.16), transparent 62%),
    repeating-linear-gradient(90deg, rgba(53, 240, 208, 0.07) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, rgba(53, 240, 208, 0.07) 0 1px, transparent 1px 64px);
  border-radius: 46% 54% 58% 42% / 54% 42% 58% 46%;
  pointer-events: none;
  z-index: 0;
}

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

.page-faq .faq-hero h1 {
  margin: 0.75rem 0 0;
  max-width: 18em;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--mist-100);
}

.page-faq .faq-hero__lede {
  margin-top: 1.25rem;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--slate-400);
}

/* ---------- 三问定位 ---------- */

.page-faq .faq-locate {
  margin-top: clamp(2rem, 4vw, 3.25rem);
  padding-bottom: 2.5rem;
}

.page-faq .faq-locate__hint {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
}

.page-faq .faq-locate__list {
  display: grid;
  gap: 0.875rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .locate-card {
  display: grid;
  gap: 0.5rem;
  height: 100%;
  padding: 1.25rem 1.375rem 1.375rem;
  background: linear-gradient(160deg, var(--ink-700) 0%, rgba(13, 46, 41, 0.55) 100%);
  border: 1px solid var(--faq-line);
  border-radius: 18px 28px 18px 28px;
  text-decoration: none;
  color: inherit;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-faq .locate-card:hover,
.page-faq .locate-card:focus-visible {
  border-color: var(--cyan-400);
  transform: translateY(-3px);
}

.page-faq .locate-card__no {
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
}

.page-faq .locate-card__q {
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--mist-100);
}

.page-faq .locate-card__to {
  font-size: 0.8125rem;
  color: var(--slate-400);
}

/* ---------- 五步清单 ---------- */

.page-faq .faq-steps {
  scroll-margin-top: calc(var(--coord-h) + 1.5rem);
  padding-block: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-steps__grid {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
}

.page-faq .faq-steps__lede {
  margin: 0.875rem 0 1.75rem;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--slate-400);
}

.page-faq .step-list {
  display: grid;
  gap: 0.625rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.5rem 1.125rem;
  padding: 1.125rem 1.25rem 1.25rem;
  background: var(--faq-panel);
  border: 1px solid var(--faq-line);
  border-radius: 16px;
  scroll-margin-top: calc(var(--coord-h) + 2rem);
}

.page-faq .step__no {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--cyan-700);
}

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

.page-faq .step__title {
  margin: 0 0 0.375rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--mist-100);
}

.page-faq .step__do,
.page-faq .step__ok,
.page-faq .step__alt {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-faq .step__do {
  color: var(--slate-400);
}

.page-faq .step__ok {
  margin-top: 0.5rem;
  color: var(--cyan-400);
}

.page-faq .step__alt {
  margin-top: 0.375rem;
  font-size: 0.875rem;
  color: var(--slate-400);
}

.page-faq .step--key {
  background:
    linear-gradient(180deg, rgba(255, 194, 75, 0.13) 0%, rgba(255, 194, 75, 0) 70%),
    var(--faq-panel);
  border-color: rgba(255, 194, 75, 0.55);
  box-shadow: 0 0 0 4px rgba(255, 194, 75, 0.07);
}

.page-faq .step--key .step__no {
  color: var(--faq-key);
  font-size: 1.5rem;
}

.page-faq .step--key .step__ok {
  color: var(--faq-key);
}

.page-faq .step-share {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  border: 1px dashed var(--faq-line);
  border-radius: 14px;
  background: rgba(13, 46, 41, 0.5);
}

.page-faq .step-share__text {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-faq .step-share__link {
  margin: 0.5rem 0 0;
  font-size: 0.9375rem;
  color: var(--cyan-400);
  word-break: break-all;
}

.page-faq .step-figure {
  margin: 0;
}

.page-faq .aside-note {
  margin-top: 1.25rem;
  padding: 1.125rem 1.25rem;
  background: rgba(53, 240, 208, 0.06);
  border-left: 3px solid var(--cyan-400);
  border-radius: 0 14px 14px 0;
}

.page-faq .aside-note__k {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
  text-transform: uppercase;
}

.page-faq .aside-note__v {
  margin: 0.25rem 0 0.375rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--mist-100);
}

.page-faq .aside-note__d {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--slate-400);
}

/* ---------- 三类原因 ---------- */

.page-faq .faq-causes {
  scroll-margin-top: calc(var(--coord-h) + 1.5rem);
  margin-top: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-causes__zone {
  padding: clamp(1.75rem, 5vw, 3.25rem) clamp(1.25rem, 4vw, 3rem);
}

.page-faq .section-head__note {
  margin: 0;
  max-width: 24em;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-faq .cause-list {
  display: grid;
  gap: 1rem;
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .cause {
  padding: 1.25rem 1.25rem 1.375rem;
  background: rgba(6, 28, 26, 0.4);
  border: 1px solid rgba(232, 245, 241, 0.12);
  border-radius: 4px 22px 4px 22px;
}

.page-faq .cause__icon {
  display: block;
  width: 34px;
  height: 34px;
  color: var(--cyan-400);
}

.page-faq .cause__icon svg {
  width: 100%;
  height: 100%;
}

.page-faq .cause__title {
  margin: 0.75rem 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--mist-100);
}

.page-faq .cause__sign {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--mist-100);
}

.page-faq .cause__act {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-faq .cause-figure {
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
}

/* ---------- 账号与设备绑定 ---------- */

.page-faq .faq-bind {
  scroll-margin-top: calc(var(--coord-h) + 1.5rem);
  margin-top: clamp(2.5rem, 6vw, 5rem);
}

.page-faq .faq-bind__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-bind__text p {
  margin: 0.875rem 0 0;
  max-width: 34em;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--slate-400);
}

.page-faq .faq-bind__text .section-title {
  margin-top: 0.625rem;
}

.page-faq .faq-bind__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem !important;
}

.page-faq .bind-list {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .bind-list li {
  display: grid;
  gap: 0.25rem;
  padding: 1rem 1.125rem;
  background: var(--faq-panel);
  border: 1px solid var(--faq-line);
  border-radius: 14px 14px 14px 4px;
}

.page-faq .bind-list__k {
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--faq-key);
}

.page-faq .bind-list__v {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--mist-100);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-data {
  scroll-margin-top: calc(var(--coord-h) + 1.5rem);
  margin-top: clamp(2.5rem, 6vw, 5rem);
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  padding: 0.875rem 1rem;
  background: rgba(13, 46, 41, 0.6);
  border: 1px solid var(--faq-line);
  border-radius: 14px;
}

.page-faq .filter-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--slate-400);
}

.page-faq .filter-input {
  flex: 1 1 12rem;
  min-width: 0;
  padding: 0.5rem 0.75rem;
  background: var(--ink-900);
  border: 1px solid var(--faq-line);
  border-radius: 10px;
  color: var(--mist-100);
  font-family: var(--font-body);
  font-size: 0.9375rem;
}

.page-faq .filter-input:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 1px;
  border-color: var(--cyan-400);
}

.page-faq .filter-input::placeholder {
  color: var(--slate-400);
}

.page-faq .filter-count {
  font-size: 0.8125rem;
  color: var(--cyan-400);
}

.page-faq .faq-list {
  margin-top: 1.25rem;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-item > summary {
  position: relative;
  padding: 1.125rem 2.75rem 1.125rem 0;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--mist-100);
  list-style: none;
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 0.25rem;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--cyan-400);
}

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

.page-faq .faq-item > summary:hover {
  color: var(--cyan-400);
}

.page-faq .faq-item .disclosure__body {
  margin: 0 0 1.375rem;
  padding: 0.25rem 0 0.25rem 1.125rem;
  border-left: 2px solid var(--cyan-400);
}

.page-faq .faq-item .disclosure__body p {
  margin: 0;
  max-width: 42em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--slate-400);
}

.page-faq .filter-empty {
  margin: 1.5rem 0 0;
  font-size: 0.9375rem;
  color: var(--slate-400);
}

.page-faq .faq-data__more {
  margin: 1.75rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--slate-400);
}

.page-faq .faq-data__more a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, 0.4);
}

.page-faq .faq-data__more a:hover {
  border-bottom-color: var(--cyan-400);
}

/* ---------- 人工支持 ---------- */

.page-faq .faq-support {
  margin-top: clamp(2.5rem, 6vw, 5rem);
}

.page-faq .faq-support__zone {
  padding: clamp(1.75rem, 5vw, 3.25rem) clamp(1.25rem, 4vw, 3rem);
}

.page-faq .faq-support__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-support__text p {
  margin: 0.875rem 0 0;
  max-width: 36em;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--mist-100);
}

.page-faq .faq-support__text a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 208, 0.4);
}

.page-faq .faq-support__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem !important;
}

.page-faq .support-meta {
  display: grid;
  gap: 0.75rem;
  margin: 0;
}

.page-faq .support-meta > div {
  padding: 0.875rem 1.125rem;
  background: rgba(6, 28, 26, 0.45);
  border: 1px solid rgba(232, 245, 241, 0.14);
  border-radius: 12px;
}

.page-faq .support-meta dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
}

.page-faq .support-meta dd {
  margin: 0.25rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--mist-100);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-locate__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    padding-bottom: 2.5rem;
  }

  .page-faq .faq-locate__list > li:nth-child(2) {
    transform: translateY(20px);
  }

  .page-faq .faq-locate__list > li:nth-child(3) {
    transform: translateY(40px);
  }

  .page-faq .cause-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .bind-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 1000px) {
  .page-faq .faq-steps__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-faq .faq-steps__aside {
    position: sticky;
    top: calc(var(--coord-h) + 1.5rem);
    margin-top: 3.25rem;
  }

  .page-faq .faq-bind__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-faq .faq-support__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-faq .bind-list {
    grid-template-columns: 1fr;
    margin-top: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .locate-card {
    transition: none;
  }

  .page-faq .locate-card:hover {
    transform: none;
  }

  .page-faq .faq-locate__list > li {
    transform: none !important;
  }
}