.page-faq {
  position: relative;
  overflow-x: clip;
  padding-bottom: clamp(56px, 8vw, 96px);
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: -140px 0 auto 0;
  height: 780px;
  background:
    radial-gradient(58% 46% at 20% 10%, rgba(108, 76, 241, .30), transparent 70%),
    radial-gradient(44% 38% at 84% 4%, rgba(34, 211, 238, .16), transparent 72%);
  pointer-events: none;
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-block: clamp(24px, 4vw, 48px) clamp(20px, 3vw, 36px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 20px;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-size: clamp(30px, 6vw, 50px);
  line-height: 1.2;
  letter-spacing: .04em;
  color: var(--gx-star);
}

.page-faq .faq-hero__copy .gx-lead {
  max-width: 46ch;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-faq .faq-hero__note {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid rgba(245, 185, 66, .65);
  font-size: 14px;
  line-height: 1.7;
  color: var(--gx-dust);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--gx-radius-l);
  border: 1px solid rgba(108, 76, 241, .38);
  background: linear-gradient(155deg, rgba(36, 20, 84, .7), rgba(6, 11, 31, .9));
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(6, 11, 31, .6);
}

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

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-stat {
  flex: 1 1 150px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 18px;
  border-radius: var(--gx-radius-m);
  border: 1px solid var(--gx-line);
  background: linear-gradient(160deg, rgba(30, 46, 99, .72), rgba(16, 26, 60, .55));
}

.page-faq .faq-stat__num {
  font-size: 22px;
  line-height: 1;
  color: var(--gx-cyan);
  letter-spacing: .04em;
}

.page-faq .faq-stat__label {
  font-size: 13px;
  color: var(--gx-dust);
}

/* ---------- 指南主体：轨道 + 章节流 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-faq .faq-rail {
  padding: 16px;
  border-radius: var(--gx-radius-l);
  border: 1px solid var(--gx-line);
  background: linear-gradient(170deg, rgba(16, 26, 60, .82), rgba(6, 11, 31, .68));
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--gx-radius-pill);
  border: 1px solid transparent;
  color: var(--gx-dust);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--gx-fast) var(--gx-ease),
              color var(--gx-fast) var(--gx-ease),
              border-color var(--gx-fast) var(--gx-ease);
}

.page-faq .faq-rail__link:hover {
  background: rgba(30, 46, 99, .9);
  border-color: var(--gx-line-strong);
  color: var(--gx-star);
}

.page-faq .faq-rail__no {
  font-size: 12px;
  color: var(--gx-cyan);
  opacity: .8;
}

.page-faq .faq-rail__dot {
  display: none;
}

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

.page-faq .faq-chapter {
  scroll-margin-top: 118px;
}

.page-faq .faq-chapter + .faq-chapter {
  margin-top: clamp(34px, 5vw, 56px);
  padding-top: clamp(34px, 5vw, 56px);
  border-top: 1px solid var(--gx-line);
}

.page-faq .faq-chapter__no {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gx-cyan);
  opacity: .85;
}

.page-faq .faq-chapter h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.3;
  letter-spacing: .04em;
  color: var(--gx-star);
}

.page-faq .faq-chapter__lead {
  margin: 0 0 22px;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gx-dust);
}

/* ---------- 步骤卡 ---------- */

.page-faq .faq-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--gx-radius-m);
  border: 1px solid var(--gx-line);
  background: linear-gradient(150deg, rgba(16, 26, 60, .9), rgba(6, 11, 31, .72));
  transition: border-color var(--gx-fast) var(--gx-ease),
              background var(--gx-fast) var(--gx-ease);
}

.page-faq .faq-step:hover {
  border-color: rgba(245, 185, 66, .5);
  background: linear-gradient(150deg, rgba(30, 46, 99, .88), rgba(16, 26, 60, .8));
}

.page-faq .faq-step__no {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gx-cyan);
  opacity: .8;
}

.page-faq .faq-step__text {
  flex: 1 1 auto;
  font-size: 15px;
  line-height: 1.65;
  color: var(--gx-star);
}

.page-faq .faq-step__check {
  flex: 0 0 auto;
  margin-left: auto;
  width: 24px;
  height: 24px;
  padding: 0;
  display: grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid var(--gx-line-strong);
  background: rgba(6, 11, 31, .85);
  cursor: pointer;
  transition: background var(--gx-fast) var(--gx-ease),
              border-color var(--gx-fast) var(--gx-ease);
}

.page-faq .faq-step__check:hover {
  border-color: var(--gx-gold);
}

.page-faq .faq-step__check[aria-pressed="true"] {
  background: linear-gradient(140deg, var(--gx-mint), var(--gx-cyan));
  border-color: var(--gx-mint);
}

.page-faq .faq-step__tick {
  width: 10px;
  height: 5px;
  border-left: 2px solid var(--gx-void);
  border-bottom: 2px solid var(--gx-void);
  transform: rotate(-45deg) translateY(-1px);
  opacity: 0;
  transition: opacity var(--gx-fast) var(--gx-ease);
}

.page-faq .faq-step__check[aria-pressed="true"] .faq-step__tick {
  opacity: 1;
}

/* ---------- 第五章：四格迁移流程 ---------- */

.page-faq .faq-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-flow__item {
  position: relative;
  padding: 18px 16px;
  border-radius: var(--gx-radius-m);
  border: 1px solid rgba(108, 76, 241, .42);
  background: linear-gradient(160deg, rgba(36, 20, 84, .85), rgba(16, 26, 60, .82));
}

.page-faq .faq-flow__no {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gx-gold);
}

.page-faq .faq-flow__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--gx-star);
}

.page-faq .faq-migrate__figure {
  margin: 24px 0 0;
  border-radius: var(--gx-radius-l);
  border: 1px solid var(--gx-line);
  background: linear-gradient(150deg, rgba(36, 20, 84, .55), rgba(6, 11, 31, .85));
  overflow: hidden;
}

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

.page-faq .faq-callout {
  margin-top: 20px;
  padding: 18px 20px;
  border-radius: var(--gx-radius-m);
  border: 1px solid rgba(245, 185, 66, .38);
  background: linear-gradient(160deg, rgba(36, 20, 84, .6), rgba(6, 11, 31, .8));
}

.page-faq .faq-callout__title {
  margin: 0 0 10px;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--gx-gold);
}

.page-faq .faq-callout__list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gx-dust);
}

/* ---------- 第六章：折叠问答 ---------- */

.page-faq .faq-qa-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-qa {
  border-radius: var(--gx-radius-m);
  border: 1px solid var(--gx-line);
  background: linear-gradient(160deg, rgba(16, 26, 60, .85), rgba(6, 11, 31, .7));
  overflow: hidden;
  transition: border-color var(--gx-fast) var(--gx-ease);
}

.page-faq .faq-qa[open] {
  border-color: var(--gx-line-strong);
}

.page-faq .faq-qa__q {
  position: relative;
  padding: 16px 48px 16px 18px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--gx-star);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-qa__q::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--gx-font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gx-gold);
  transition: transform var(--gx-base) var(--gx-ease);
}

.page-faq .faq-qa[open] .faq-qa__q::after {
  transform: translateY(-50%) rotate(45deg);
}

.page-faq .faq-qa__a {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gx-dust);
  animation: faq-qa-in var(--gx-base) var(--gx-ease);
}

@keyframes faq-qa-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 人工协助 ---------- */

.page-faq .faq-help {
  padding-top: 0;
}

.page-faq .faq-help__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding: clamp(22px, 4vw, 36px);
  border-radius: var(--gx-radius-l);
  border: 1px solid rgba(245, 185, 66, .32);
  background:
    radial-gradient(70% 120% at 8% 0%, rgba(108, 76, 241, .28), transparent 68%),
    linear-gradient(160deg, rgba(16, 26, 60, .94), rgba(6, 11, 31, .9));
}

.page-faq .faq-help__intro h2 {
  margin: 6px 0 14px;
  font-size: clamp(22px, 3.2vw, 28px);
  line-height: 1.35;
  letter-spacing: .04em;
  color: var(--gx-star);
}

.page-faq .faq-help__intro p {
  margin: 0 0 12px;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gx-dust);
}

.page-faq .faq-help__hint {
  font-size: 14px;
}

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

.page-faq .faq-help__contact {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  padding: 12px 14px;
  border-radius: var(--gx-radius-m);
  border: 1px solid var(--gx-line);
  background: rgba(6, 11, 31, .6);
}

.page-faq .faq-help__copy {
  margin-left: auto;
}

.page-faq .faq-help__note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gx-dust);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

/* ---------- 断点 ---------- */

@media (min-width: 768px) {
  .page-faq .faq-steps--dense {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq .faq-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
    align-items: center;
    gap: 48px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    padding: 20px 18px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0 0 0 24px;
    position: relative;
  }

  .page-faq .faq-rail__list::before {
    content: "";
    position: absolute;
    left: 8px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--gx-cyan), rgba(34, 211, 238, .08));
  }

  .page-faq .faq-rail__link {
    position: relative;
    width: 100%;
    padding: 9px 12px;
    border-radius: var(--gx-radius-s);
  }

  .page-faq .faq-rail__dot {
    display: block;
    position: absolute;
    left: -24px;
    top: 50%;
    width: 15px;
    height: 15px;
    margin-top: -8px;
    border-radius: 50%;
    border: 1px solid var(--gx-line-strong);
    background: var(--gx-void);
    transition: background var(--gx-fast) var(--gx-ease),
                border-color var(--gx-fast) var(--gx-ease);
  }

  .page-faq .faq-rail__link:hover .faq-rail__dot {
    background: var(--gx-cyan);
    border-color: var(--gx-cyan);
  }

  .page-faq .faq-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-flow__item:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -14px;
    top: 34px;
    width: 14px;
    height: 14px;
    border-top: 2px solid rgba(34, 211, 238, .55);
    border-right: 2px solid rgba(34, 211, 238, .55);
    border-radius: 0 6px 0 0;
    transform: rotate(45deg);
  }

  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 44px;
    align-items: start;
  }
}

@media (min-width: 1440px) {
  .page-faq .faq-layout {
    grid-template-columns: 296px minmax(0, 1fr);
    gap: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-step__check,
  .page-faq .faq-step__tick,
  .page-faq .faq-rail__link,
  .page-faq .faq-rail__dot,
  .page-faq .faq-qa__q::after {
    transition: none;
  }

  .page-faq .faq-qa__a {
    animation: none;
  }
}