.page-faq {
  --faq-cut: 16px;
  --faq-cut-path: polygon(var(--faq-cut) 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%, 0 var(--faq-cut));

  background: var(--abyss);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq p {
  margin: 0 0 1em;
}

.page-faq a:not(.btn) {
  color: var(--neon);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq a:not(.btn):hover {
  color: var(--gold-lit);
}

.page-faq ul,
.page-faq ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------------- 首屏 ---------------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(44px, 7vw, 92px) 0 clamp(38px, 5.5vw, 68px);
  background:
    radial-gradient(900px 520px at 84% 4%, rgba(53, 214, 208, 0.10), transparent 70%),
    radial-gradient(640px 460px at 2% 96%, rgba(201, 162, 75, 0.10), transparent 72%),
    var(--abyss);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(159, 176, 196, 0.055) 0 1px,
    transparent 1px 92px
  );
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
  align-items: stretch;
}

.page-faq h1 {
  font-weight: 300;
  font-size: clamp(34px, 5.6vw, 62px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: clamp(14px, 2vw, 22px) 0 0;
}

.page-faq .faq-hero-lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 46ch;
  font-size: clamp(16px, 1.55vw, 18px);
  line-height: 1.92;
  color: var(--paper);
}

.page-faq .faq-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: clamp(24px, 3.5vw, 38px) 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-hero-facts dt {
  margin: 0 0 4px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mute);
}

.page-faq .faq-hero-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.1;
  color: var(--gold);
}

.page-faq .faq-hero-aside {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: 300px;
  padding: clamp(20px, 3.4vw, 30px);
  overflow: hidden;
  background: var(--deck);
  clip-path: var(--faq-cut-path);
}

.page-faq .faq-hero-wash {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.36;
}

.page-faq .faq-hero-aside::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(158deg, rgba(10, 21, 38, 0.5) 0%, rgba(10, 21, 38, 0.94) 76%);
  pointer-events: none;
}

.page-faq .faq-rail {
  position: relative;
  z-index: 1;
  width: 100%;
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-faq .faq-rail-list li + li {
  border-top: 1px solid rgba(30, 58, 95, 0.9);
}

.page-faq .faq-rail-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  font-size: 15px;
}

.page-faq .faq-rail-list .mono {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  flex: none;
}

.page-faq .faq-rail-list em {
  font-style: normal;
}

.page-faq .faq-rail-list i {
  font-style: normal;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mute);
  opacity: 0.8;
}

/* ---------------- 进站四步 ---------------- */

.page-faq .faq-steps {
  padding: clamp(48px, 7.5vw, 96px) 0 clamp(36px, 5vw, 64px);
}

.page-faq .faq-steps-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 3vw, 34px);
  padding-bottom: clamp(20px, 3vw, 30px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-steps-note {
  margin: 0;
  max-width: 42ch;
  font-size: 16px;
  color: var(--mute);
}

.page-faq .faq-track {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.6vw, 24px);
  margin: clamp(28px, 4vw, 44px) 0 clamp(30px, 4.5vw, 50px);
}

.page-faq .faq-track-item {
  padding: 20px 18px 22px;
  background: linear-gradient(180deg, rgba(18, 35, 61, 0.94) 0%, rgba(18, 35, 61, 0.52) 100%);
  border-top: 2px solid var(--gold);
}

.page-faq .faq-track-num {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-faq .faq-track-title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 800;
}

.page-faq .faq-track-item p:not(.faq-track-num) {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mute);
}

.page-faq .faq-track-link {
  font-size: 13px;
  letter-spacing: 0.04em;
  border-bottom: 1px solid rgba(53, 214, 208, 0.45);
  padding-bottom: 2px;
}

.page-faq .faq-steps-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--deck);
}

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

.page-faq .faq-steps-figure figcaption {
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mute);
}

/* ---------------- 问答主体 ---------------- */

.page-faq .faq-book {
  padding: clamp(36px, 5vw, 68px) 0 clamp(52px, 8vw, 100px);
}

.page-faq .faq-book-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-faq .faq-ruler-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mute);
}

.page-faq .faq-ruler-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.page-faq .faq-ruler-list a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px 9px 13px;
  font-size: 14px;
  color: var(--mute);
  border-left: 2px solid transparent;
}

.page-faq .faq-ruler-list a:hover,
.page-faq .faq-ruler-list a:focus-visible {
  color: var(--gold-lit);
  border-left-color: var(--gold);
}

.page-faq .faq-ruler-list .mono {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  flex: none;
}

.page-faq .faq-ruler-list em {
  font-style: normal;
}

.page-faq .faq-ruler-list i {
  font-style: normal;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--mute);
  opacity: 0.7;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(22px, 3.5vw, 34px);
}

.page-faq .faq-chip {
  font-family: inherit;
  font-size: 13px;
  letter-spacing: 0.04em;
  line-height: 1;
  padding: 10px 16px;
  color: var(--mute);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-chip:hover {
  color: var(--gold-lit);
  border-color: var(--gold);
}

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

.page-faq .faq-chip[aria-pressed="true"] {
  color: var(--abyss);
  background: var(--neon);
  border-color: var(--neon);
}

.page-faq .faq-group {
  margin-bottom: clamp(30px, 4.6vw, 52px);
  scroll-margin-top: 108px;
}

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

.page-faq .faq-group-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group-num {
  flex: none;
  padding: 4px 8px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--abyss);
  background: var(--gold);
}

.page-faq .faq-group-name {
  font-size: clamp(19px, 2.4vw, 24px);
}

.page-faq .faq-group-count {
  margin-left: auto;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mute);
}

.page-faq .faq-list {
  padding: 4px clamp(16px, 3vw, 28px) 10px;
  background: linear-gradient(180deg, rgba(18, 35, 61, 0.86) 0%, rgba(18, 35, 61, 0.48) 100%);
  clip-path: var(--faq-cut-path);
}

.page-faq .faq-q {
  border-top: 1px solid rgba(30, 58, 95, 0.7);
}

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

.page-faq .faq-q > summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 17px 0;
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
  transition: color 0.2s var(--ease);
}

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

.page-faq .faq-q > summary::marker {
  content: "";
}

.page-faq .faq-q > summary:hover {
  color: var(--gold-lit);
}

.page-faq .faq-q > summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 4px;
}

.page-faq .faq-q > summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  align-self: center;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold);
  transition: transform 0.24s var(--ease), color 0.24s var(--ease);
}

.page-faq .faq-q[open] > summary::after {
  content: "+";
  transform: rotate(45deg);
  color: var(--neon);
}

.page-faq .faq-q-num {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .faq-q-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-a {
  margin: 0;
  padding: 0 0 20px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--mute);
}

.page-faq .faq-a a {
  border-bottom: 1px solid rgba(53, 214, 208, 0.45);
}

/* ---------------- 还是没解决 ---------------- */

.page-faq .faq-escalate {
  padding: clamp(46px, 7.5vw, 92px) 0 clamp(52px, 8vw, 100px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 35, 61, 0) 0%, rgba(18, 35, 61, 0.62) 34%, rgba(18, 35, 61, 0.62) 100%);
}

.page-faq .faq-escalate-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-faq .faq-escalate-lead p:not(.kicker) {
  margin: clamp(14px, 2vw, 20px) 0 clamp(20px, 3vw, 28px);
  max-width: 46ch;
  font-size: 16px;
  color: var(--mute);
}

.page-faq .faq-prepare {
  padding: clamp(18px, 3vw, 26px);
  background: rgba(10, 21, 38, 0.66);
  border: 1px solid var(--line);
  clip-path: var(--faq-cut-path);
}

.page-faq .faq-prepare-title {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-prepare-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  font-size: 15px;
  color: var(--paper);
  border-top: 1px dashed rgba(30, 58, 95, 0.95);
}

.page-faq .faq-prepare-list li:first-child {
  border-top: 0;
}

.page-faq .faq-prepare-list .mono {
  flex: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mute);
}

.page-faq .faq-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-faq .faq-channel {
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-channel-label {
  margin: 0 0 4px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mute);
}

.page-faq .faq-channel-value {
  margin: 0;
  font-size: 15px;
  color: var(--paper);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-faq .faq-channel-note {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mute);
}

/* ---------------- 响应式 ---------------- */

@media (min-width: 560px) {
  .page-faq .faq-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-a {
    padding-left: 34px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: start;
  }

  .page-faq .faq-track-item:nth-child(2) {
    margin-top: 14px;
  }

  .page-faq .faq-track-item:nth-child(3) {
    margin-top: 28px;
  }

  .page-faq .faq-track-item:nth-child(4) {
    margin-top: 42px;
  }

  .page-faq .faq-steps-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-book-grid {
    grid-template-columns: 178px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-ruler {
    position: sticky;
    top: 108px;
  }

  .page-faq .faq-ruler-list {
    display: block;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-ruler-list a {
    padding: 10px 12px 10px 14px;
    margin-left: -1px;
  }

  .page-faq .faq-escalate-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    grid-template-areas:
      "lead prepare"
      "lead channels";
    column-gap: clamp(32px, 5vw, 64px);
    row-gap: clamp(20px, 3vw, 30px);
  }

  .page-faq .faq-escalate-lead {
    grid-area: lead;
  }

  .page-faq .faq-prepare {
    grid-area: prepare;
  }

  .page-faq .faq-channels {
    grid-area: channels;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.22fr) minmax(290px, 0.78fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q > summary::after,
  .page-faq .faq-chip,
  .page-faq .faq-q > summary,
  .page-faq a:not(.btn) {
    transition: none;
  }

  .page-faq .faq-q[open] > summary::after {
    transform: none;
  }
}