.page-faq {
  --faq-nav-w: 224px;
  --faq-gap: clamp(28px, 4vw, 56px);
  --faq-line: rgba(43, 245, 200, 0.16);
  --faq-text: #c6ded8;
  --faq-panel: rgba(18, 66, 59, 0.55);
  background: var(--ink-900);
  color: var(--paper);
  padding: 0 0 clamp(56px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: calc(var(--header-h) + clamp(24px, 4vw, 44px)) 0 clamp(36px, 5vw, 60px);
  background:
    radial-gradient(900px 380px at 84% -12%, rgba(43, 245, 200, 0.2), transparent 64%),
    radial-gradient(640px 320px at 4% 4%, rgba(31, 216, 180, 0.1), transparent 62%),
    linear-gradient(180deg, var(--grad-a) 0%, var(--ink-900) 82%);
  border-bottom: 1px solid var(--faq-line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  left: 42%;
  right: -8%;
  bottom: -74%;
  height: 300px;
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  border-top: 1px solid rgba(43, 245, 200, 0.22);
  background: linear-gradient(180deg, rgba(43, 245, 200, 0.06), transparent 72%);
  pointer-events: none;
}

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

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  max-width: 17em;
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.9;
  color: var(--faq-text);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 15px 18px;
  border-radius: var(--r-md);
  border-left: 3px solid var(--cyan-500);
  background: linear-gradient(120deg, rgba(18, 66, 59, 0.85), rgba(14, 47, 42, 0.5));
}

.page-faq .faq-fact__value {
  font-family: var(--font-num);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan-500);
}

.page-faq .faq-fact__label {
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  padding-top: clamp(28px, 4vw, 52px);
}

.page-faq .faq-nav {
  position: sticky;
  top: calc(var(--header-h) + 8px);
  z-index: 6;
  margin-inline: calc(var(--gutter) * -1);
  padding: 10px var(--gutter) 12px;
  background: linear-gradient(180deg, var(--ink-900) 72%, rgba(7, 33, 29, 0));
}

.page-faq .faq-nav__title {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-nav__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-nav__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-nav__list a {
  display: block;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid rgba(43, 245, 200, 0.28);
  border-radius: var(--r-pill);
  font-size: 13px;
  color: var(--cyan-300);
  text-decoration: none;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-nav__list a:hover,
.page-faq .faq-nav__list a:focus-visible {
  border-color: var(--cyan-500);
  color: var(--paper);
}

.page-faq .faq-nav__list a[aria-current="true"] {
  background: var(--cyan-500);
  border-color: var(--cyan-500);
  color: var(--ink-900);
  font-weight: 600;
}

.page-faq .faq-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(44px, 6vw, 76px);
  min-width: 0;
}

.page-faq .faq-block {
  scroll-margin-top: calc(var(--header-h) + 76px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px dashed rgba(43, 245, 200, 0.18);
}

.page-faq .faq-block .section__title {
  margin-bottom: 12px;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.28;
}

.page-faq .faq-block .section__lede {
  max-width: 58ch;
  color: var(--faq-text);
}

/* ---------- 三步排查 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(24px, 3vw, 34px);
}

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

.page-faq .faq-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-step {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 26px;
}

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

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 54px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan-500), rgba(43, 245, 200, 0.12));
}

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

.page-faq .faq-step__num {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 2px solid var(--cyan-500);
  border-radius: var(--r-pill);
  background: var(--ink-900);
  color: var(--cyan-500);
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-faq .faq-step__body {
  min-width: 0;
  padding: 16px 18px;
  border: 1px solid rgba(43, 245, 200, 0.12);
  border-radius: var(--r-md);
  background: linear-gradient(140deg, var(--faq-panel), rgba(14, 47, 42, 0.45));
}

.page-faq .faq-step__title {
  margin: 0 0 10px;
  font-size: 16.5px;
  line-height: 1.4;
  color: var(--paper);
}

.page-faq .faq-step__check {
  display: flex;
  gap: 8px;
  margin: 0 0 10px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-step__tick {
  flex: none;
  color: var(--cyan-500);
  font-weight: 700;
}

.page-faq .faq-step__act {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid rgba(43, 245, 200, 0.32);
  font-size: 14px;
  line-height: 1.82;
  color: var(--faq-text);
}

.page-faq .faq-step__act strong {
  color: var(--cyan-300);
  font-weight: 600;
}

/* ---------- 问答折叠面板 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid rgba(43, 245, 200, 0.12);
  border-left: 3px solid transparent;
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(18, 66, 59, 0.5), rgba(14, 47, 42, 0.5));
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--cyan-500);
  background: linear-gradient(180deg, rgba(18, 66, 59, 0.86), rgba(14, 47, 42, 0.66));
}

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 18px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.62;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q::after {
  content: "";
  flex: none;
  margin-left: auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--cyan-500);
  border-bottom: 2px solid var(--cyan-500);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.3s var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(-135deg) translate(-3px, -3px);
}

.page-faq .faq-item__q:hover {
  color: var(--cyan-300);
}

.page-faq .faq-item__a {
  padding: 0 18px 18px;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--faq-text);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item__a a {
  color: var(--cyan-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover {
  color: var(--cyan-500);
}

/* ---------- 联系收口 ---------- */
.page-faq .faq-contact {
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid rgba(43, 245, 200, 0.28);
  border-radius: var(--r-lg);
  background:
    radial-gradient(520px 220px at 92% 0%, rgba(31, 216, 180, 0.18), transparent 68%),
    linear-gradient(140deg, rgba(10, 59, 56, 0.96), rgba(14, 47, 42, 0.9));
}

.page-faq .faq-contact p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.88;
  color: var(--faq-text);
}

.page-faq .faq-contact__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 22px 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contact__list li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding-left: 12px;
  border-left: 2px solid rgba(43, 245, 200, 0.4);
}

.page-faq .faq-contact__k {
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-contact__v {
  font-family: var(--font-num);
  font-size: 14px;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__more {
  margin: 0 0 14px;
}

.page-faq .faq-contact__note {
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-contact__note a {
  color: var(--cyan-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-faq .faq-nav {
    margin-inline: 0;
    padding: 20px 18px;
    border: 1px solid rgba(43, 245, 200, 0.14);
    border-radius: var(--r-lg);
    background: rgba(14, 47, 42, 0.72);
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
  }

  .page-faq .faq-nav__list a {
    padding: 9px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--r-sm) var(--r-sm) 0;
    white-space: normal;
    line-height: 1.5;
  }

  .page-faq .faq-nav__list a[aria-current="true"] {
    background: rgba(43, 245, 200, 0.14);
    border-left-color: var(--cyan-500);
    color: var(--cyan-500);
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-nav-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-step {
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 20px;
    padding-bottom: 32px;
  }

  .page-faq .faq-step::before {
    left: 27px;
    top: 62px;
  }

  .page-faq .faq-step__num {
    width: 56px;
    height: 56px;
    font-size: 17px;
  }

  .page-faq .faq-step__body {
    padding: 20px 22px;
  }

  .page-faq .faq-item__q {
    padding: 17px 22px;
    font-size: 15.5px;
  }

  .page-faq .faq-item__a {
    padding: 0 22px 20px;
  }
}

@media (min-width: 1200px) {
  .page-faq {
    --faq-nav-w: 244px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__q::after,
  .page-faq .faq-nav__list a {
    transition: none;
  }
}