.page-faq {
  --faq-track: rgba(185, 190, 220, 0.18);
  --faq-line: rgba(58, 43, 92, 0.85);
  --faq-drop: 220ms;
  padding-bottom: 72px;
}

/* ---------- 首屏：斜切机台屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 30px;
  background:
    radial-gradient(120% 120% at 92% 2%, rgba(198, 75, 255, 0.28), transparent 58%),
    radial-gradient(90% 90% at 0% 108%, rgba(43, 231, 245, 0.14), transparent 60%),
    linear-gradient(180deg, var(--ink-3), var(--ink));
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  left: 50%;
  width: 62%;
  height: 176%;
  background: linear-gradient(150deg, rgba(76, 255, 176, 0.18), rgba(43, 231, 245, 0.03) 58%, transparent 78%);
  transform: rotate(-6deg);
  pointer-events: none;
}

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

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 8.4vw, 61px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  color: var(--mute);
  font-size: 16px;
  line-height: 1.75;
  max-width: 62ch;
}

.page-faq .faq-hero__index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__index a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  font-size: 14px;
  line-height: 1.2;
  color: var(--paper);
  text-decoration: none;
  background: rgba(23, 16, 41, 0.86);
  clip-path: var(--cut-xs);
  transition: background 180ms ease, color 180ms ease;
}

.page-faq .faq-hero__index a .arc-mono {
  font-size: 12px;
  color: var(--green);
  letter-spacing: 0.06em;
}

.page-faq .faq-hero__index a:hover,
.page-faq .faq-hero__index a:focus-visible {
  background: rgba(76, 255, 176, 0.14);
  color: var(--green);
}

/* ---------- 折叠面板栈 ---------- */
.page-faq .faq-body {
  margin-top: 26px;
}

.page-faq .faq-stack {
  display: grid;
  gap: 16px;
}

.page-faq .faq-item {
  display: block;
  margin: 0;
  background: var(--ink-2);
  clip-path: var(--cut);
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(58, 43, 92, 0.7);
}

.page-faq .faq-item__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  background: linear-gradient(96deg, rgba(76, 255, 176, 0.08), rgba(76, 255, 176, 0) 52%);
  -webkit-tap-highlight-color: transparent;
}

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

.page-faq .faq-item__head:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .faq-item__id {
  flex: none;
  padding: 3px 7px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--green);
  background: rgba(76, 255, 176, 0.12);
  clip-path: var(--cut-xs);
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: 20px;
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-item__mark {
  flex: none;
  width: 10px;
  height: 10px;
  margin-left: auto;
  border-right: 2px solid var(--mute-dim);
  border-bottom: 2px solid var(--mute-dim);
  transform: rotate(45deg);
  transition: transform var(--faq-drop) ease, border-color var(--faq-drop) ease;
}

.page-faq .faq-item[open] .faq-item__mark {
  transform: rotate(-135deg);
  border-color: var(--green);
}

.page-faq .faq-item__body {
  padding: 2px 18px 22px;
  color: var(--mute);
  font-size: 16px;
  line-height: 1.75;
  animation: faq-drop var(--faq-drop) ease-out;
}

@keyframes faq-drop {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-item__body p {
  margin: 0 0 12px;
  max-width: 68ch;
}

.page-faq .faq-item__body b {
  color: var(--paper);
  font-weight: 700;
}

.page-faq .faq-item__body a:not(.arc-btn) {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__body .arc-btn {
  margin-top: 16px;
}

.page-faq .faq-item__body .arc-btn--primary {
  margin-top: 18px;
}

/* ---------- Q01 最短路径 ---------- */
.page-faq .faq-path {
  display: grid;
  gap: 14px;
  margin: 16px 0 18px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-path li {
  position: relative;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .faq-path li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 28px;
  bottom: -14px;
  width: 1px;
  background: linear-gradient(180deg, rgba(76, 255, 176, 0.5), rgba(76, 255, 176, 0));
}

.page-faq .faq-path li:last-child::before {
  display: none;
}

.page-faq .faq-path__n {
  font-size: 15px;
  line-height: 1.7;
  color: var(--mango);
  letter-spacing: 0.06em;
}

.page-faq .faq-path p {
  margin: 4px 0 0;
  font-size: 15px;
  max-width: 66ch;
}

/* ---------- Q02 时长对照 ---------- */
.page-faq .faq-dur {
  display: grid;
  gap: 22px;
  margin: 18px 0 14px;
}

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

.page-faq .faq-durrow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "name val"
    "track track";
  gap: 6px 10px;
  align-items: center;
  margin-bottom: 14px;
}

.page-faq .faq-durrow__name {
  grid-area: name;
  font-size: 15px;
  color: var(--paper);
  min-width: 0;
}

.page-faq .faq-durrow__name em {
  font-style: normal;
  margin-left: 8px;
  font-size: 12px;
  color: var(--mute-dim);
}

.page-faq .faq-durrow__track {
  grid-area: track;
  display: block;
  height: 10px;
  background: var(--faq-track);
  clip-path: var(--cut-xs);
  overflow: hidden;
}

.page-faq .faq-durrow__bar {
  display: block;
  height: 100%;
  width: var(--w, 10%);
  background: linear-gradient(90deg, var(--mango), rgba(255, 194, 75, 0.35));
}

.page-faq .faq-durrow__val {
  grid-area: val;
  font-size: 13px;
  color: var(--mango);
  white-space: nowrap;
}

.page-faq .faq-dur__fig {
  margin: 0;
  background: var(--ink-3);
  clip-path: var(--cut);
  overflow: hidden;
}

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

/* ---------- Q03 三步流程 ---------- */
.page-faq .faq-flow {
  position: relative;
  overflow: hidden;
  margin-top: 18px;
  padding: 20px 18px 22px;
  background: linear-gradient(200deg, var(--ink-3), var(--ink-2));
  clip-path: var(--cut);
}

.page-faq .faq-flow__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.14;
  pointer-events: none;
}

.page-faq .faq-flow__list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-flow__step {
  position: relative;
  min-width: 0;
}

.page-faq .faq-flow__step + .faq-flow__step::before {
  content: "";
  position: absolute;
  top: -19px;
  left: 22px;
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--green);
  border-bottom: 2px solid var(--green);
  transform: rotate(45deg);
}

.page-faq .faq-flow__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-flow__t {
  margin: 8px 0 0;
  font-size: 18px;
  font-weight: 900;
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .faq-flow__step p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mute);
  max-width: 46ch;
}

.page-faq .faq-flow__where {
  display: inline-block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mute-dim);
}

.page-faq .faq-flow__end {
  position: relative;
  z-index: 1;
  margin: 24px 0 0;
}

/* ---------- Q04 移动端手势 ---------- */
.page-faq .faq-mobile {
  display: grid;
  gap: 10px;
  margin: 16px 0 4px;
}

.page-faq .faq-mobile__row {
  padding: 12px 14px;
  background: var(--ink-3);
  clip-path: var(--cut-sm);
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-mobile__g {
  display: block;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-mobile__row p {
  margin: 6px 0 0;
  font-size: 15px;
  color: var(--mute);
  max-width: 64ch;
}

/* ---------- Q05 子条目 ---------- */
.page-faq .faq-sub {
  display: grid;
  gap: 16px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-sub li {
  position: relative;
  padding-left: 16px;
}

.page-faq .faq-sub li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--green);
}

.page-faq .faq-sub__t {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .faq-sub p {
  margin: 6px 0 0;
  font-size: 15px;
  color: var(--mute);
}

.page-faq .faq-note {
  margin: 14px 0 0;
  font-size: 14px;
  color: var(--mute-dim);
}

/* ---------- 收束条 ---------- */
.page-faq .faq-tail {
  margin-top: 26px;
  padding: 20px 18px;
  background: linear-gradient(120deg, rgba(43, 231, 245, 0.12), rgba(198, 75, 255, 0.14));
  clip-path: var(--cut);
}

.page-faq .faq-tail p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  max-width: 68ch;
}

.page-faq .faq-tail__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 14px;
}

.page-faq .faq-tail__links a {
  font-size: 15px;
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-faq .faq-tail__links a:hover,
.page-faq .faq-tail__links a:focus-visible {
  color: var(--green);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 860px) {
  .page-faq {
    padding-bottom: 96px;
  }

  .page-faq .faq-hero {
    padding: 64px 0 56px;
  }

  .page-faq .faq-hero__lead {
    font-size: 18px;
  }

  .page-faq .faq-body {
    margin-top: 34px;
  }

  .page-faq .faq-item__head {
    padding: 22px 26px;
    gap: 16px;
  }

  .page-faq .faq-item__q {
    font-size: 25px;
  }

  .page-faq .faq-item__body {
    padding: 2px 26px 28px;
  }

  .page-faq .faq-dur {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 32px;
  }

  .page-faq .faq-durrow {
    grid-template-columns: 190px minmax(0, 1fr) 88px;
    grid-template-areas: "name track val";
    gap: 14px;
  }

  .page-faq .faq-flow {
    padding: 28px 30px 30px;
  }

  .page-faq .faq-flow__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 34px;
  }

  .page-faq .faq-flow__step + .faq-flow__step::before {
    top: 22px;
    left: -22px;
    transform: rotate(-45deg);
  }

  .page-faq .faq-mobile__row {
    display: grid;
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 4px 18px;
    align-items: baseline;
  }

  .page-faq .faq-mobile__row p {
    margin-top: 0;
  }

  .page-faq .faq-tail {
    padding: 26px 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__body {
    animation: none;
  }

  .page-faq .faq-item__mark {
    transition: none;
  }
}

.page-faq {
  --w: 1rem;
}