.page-faq {
  --faq-rail: 258px;
  --faq-tap: 118px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  position: relative;
  isolation: isolate;
  padding: calc(var(--faq-tap) + 24px) 0 44px;
  overflow: hidden;
}

.page-faq .faq-intro::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 460px at 8% -20%, rgba(200, 16, 46, 0.32), transparent 62%),
    radial-gradient(700px 420px at 96% 0%, rgba(14, 46, 51, 0.9), transparent 70%),
    linear-gradient(180deg, rgba(20, 28, 43, 0.9), rgba(11, 14, 19, 0) 78%);
}

.page-faq .faq-intro__grid {
  display: grid;
  gap: 30px;
  margin-top: 26px;
}

@media (min-width: 900px) {
  .page-faq .faq-intro__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
    gap: 56px;
  }
}

.page-faq .faq-intro__lead h1 {
  margin: 18px 0 0;
  font-size: clamp(2.05rem, 5.4vw, 4rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--paper);
  max-width: 20ch;
}

.page-faq .faq-intro__text {
  margin: 20px 0 0;
  max-width: 56ch;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-intro__nav {
  padding: 20px 20px 18px;
  background: linear-gradient(160deg, rgba(14, 46, 51, 0.85), rgba(11, 14, 19, 0.7));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-l);
}

.page-faq .faq-intro__navtitle {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .faq-intro__jump {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-faq .faq-intro__jump a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-s);
  color: var(--paper);
  font-size: 0.94rem;
  text-decoration: none;
  transition: border-color var(--ease), transform var(--ease), background var(--ease);
}

.page-faq .faq-intro__jump a::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--gold-flag);
}

.page-faq .faq-intro__jump a:hover {
  border-color: var(--red);
  background: rgba(200, 16, 46, 0.1);
  transform: translateX(-2px);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-bottom: 96px;
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 0 60px;
    align-items: start;
  }
}

/* ---------- 左栏目录 ---------- */
.page-faq .faq-rail {
  border-top: 1px solid var(--line);
  padding: 16px 0 0;
}

@media (min-width: 960px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 112px;
    border-top: 1px solid var(--line);
    padding: 18px 0 24px;
  }
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .chapter-counter {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

@media (min-width: 960px) {
  .page-faq .chapter-counter {
    flex-direction: column;
    gap: 1px;
    overflow: visible;
    padding-bottom: 0;
  }
}

.page-faq .chapter-counter__link {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 10px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  color: var(--mist);
  font-size: 0.92rem;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--ease), background var(--ease), border-color var(--ease);
}

.page-faq .chapter-counter__link:hover {
  color: var(--paper);
  background: rgba(217, 164, 65, 0.08);
}

.page-faq .chapter-counter__link.is-active {
  color: var(--paper);
  border-left-color: var(--red);
  background: linear-gradient(90deg, rgba(200, 16, 46, 0.22), rgba(200, 16, 46, 0));
}

.page-faq .chapter-counter__num {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--gold-flag);
}

@media (max-width: 959px) {
  .page-faq .chapter-counter__link {
    border-left: 0;
    border-bottom: 2px solid transparent;
    border-radius: var(--radius-s) var(--radius-s) 0 0;
  }

  .page-faq .chapter-counter__link.is-active {
    border-bottom-color: var(--red);
    background: linear-gradient(180deg, rgba(200, 16, 46, 0), rgba(200, 16, 46, 0.2));
  }
}

/* ---------- 右栏问答流 ---------- */
.page-faq .faq-flow {
  display: grid;
  gap: 62px;
  min-width: 0;
}

.page-faq .faq-chapter {
  scroll-margin-top: 118px;
  min-width: 0;
}

.page-faq .faq-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-chapter__num {
  font-family: var(--font-num);
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--red-lit);
}

.page-faq .faq-chapter h2 {
  margin: 0;
  font-size: clamp(1.22rem, 2.4vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-chapter__lede {
  margin: 16px 0 20px;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-chapter__lede a,
.page-faq .faq-more a {
  color: var(--sky);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 155, 214, 0.45);
  transition: color var(--ease), border-color var(--ease);
}

.page-faq .faq-chapter__lede a:hover,
.page-faq .faq-more a:hover {
  color: var(--gold-flag);
  border-bottom-color: var(--gold-flag);
}

/* ---------- 手风琴问答 ---------- */
.page-faq .faq-q {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-q__summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 2px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.62;
  transition: color var(--ease);
}

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

.page-faq .faq-q__summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1.3;
  color: var(--gold-flag);
  transition: transform var(--ease), color var(--ease);
}

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

.page-faq .faq-q:hover .faq-q__summary {
  color: var(--gold-flag);
}

.page-faq .faq-q[open] .faq-q__summary {
  color: var(--paper);
}

.page-faq .faq-q[open] .faq-q__summary::after {
  content: "–";
  color: var(--red-lit);
}

.page-faq .faq-q__body {
  padding: 0 2px 24px;
  max-width: 68ch;
  font-size: 0.97rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-q__body p {
  margin: 0 0 0.9em;
}

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

.page-faq .faq-q__body .figure {
  margin-top: 16px;
}

/* ---------- 要点列表 ---------- */
.page-faq .faq-plain {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-plain--wide {
  margin-bottom: 24px;
  gap: 10px;
}

.page-faq .faq-plain li {
  position: relative;
  padding-left: 18px;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-faq .faq-plain li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.66em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------- 三步收藏 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 18px 20px 18px 64px;
  border-left: 2px solid var(--line);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  background: linear-gradient(120deg, rgba(20, 28, 43, 0.9), rgba(11, 14, 19, 0.4));
}

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  width: 2px;
  height: 22px;
  background: var(--gold-flag);
}

.page-faq .faq-steps__num {
  position: absolute;
  left: 20px;
  top: 19px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--gold-flag);
}

.page-faq .faq-steps__item h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 排查顺序 ---------- */
.page-faq .faq-trouble {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-trouble li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .faq-trouble__num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--gold-flag);
}

.page-faq .faq-trouble__text {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.82;
  color: var(--mist);
}

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

.page-faq .faq-key {
  display: inline-block;
  margin: 0 2px;
  padding: 1px 8px;
  font-family: var(--font-mono);
  font-size: 0.84em;
  letter-spacing: 0.06em;
  color: var(--paper);
  background: rgba(217, 164, 65, 0.14);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 6px;
}

/* ---------- 联系与说明 ---------- */
.page-faq .faq-contact {
  margin-top: 24px;
  padding: 20px 22px;
  background: linear-gradient(150deg, var(--wine), var(--wine-deep));
  border: 1px solid rgba(200, 16, 46, 0.35);
  border-radius: var(--radius-m);
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(245, 241, 232, 0.1);
}

.page-faq .faq-contact__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

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

.page-faq .faq-contact__key {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .faq-contact__val {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

@media (min-width: 700px) {
  .page-faq .faq-contact__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }
}

.page-faq .faq-note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--sky);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(46, 155, 214, 0.08);
  font-size: 0.93rem;
  line-height: 1.72;
  color: var(--mist);
}

.page-faq .faq-more {
  margin: 20px 0 0;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 图片容器微调 ---------- */
.page-faq .figure {
  margin: 20px 0 4px;
  max-width: 100%;
}

.page-faq .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-m);
}

/* ---------- 窄屏保护 ---------- */
@media (max-width: 619px) {
  .page-faq .faq-intro {
    padding-top: calc(var(--faq-tap) + 10px);
  }

  .page-faq .faq-steps__item {
    padding: 16px 16px 16px 56px;
  }

  .page-faq .faq-steps__num {
    left: 16px;
    top: 17px;
  }

  .page-faq .faq-trouble li {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition: none !important;
    animation: none !important;
  }
}