.page-faq {
  --faq-index-w: 214px;
  --faq-skew: -9deg;
  padding-bottom: clamp(40px, 7vw, 92px);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--topbar-h) + 26px) 0 clamp(22px, 3.4vw, 40px);
  border-bottom: 1px solid var(--line-hard);
  background:
    radial-gradient(120% 92% at 88% 0%, rgba(34, 211, 238, 0.17), transparent 58%),
    radial-gradient(84% 80% at 2% 100%, rgba(255, 122, 61, 0.13), transparent 62%),
    linear-gradient(180deg, var(--rail), var(--deep));
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
  background-image: repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 52px);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 84%);
  mask-image: linear-gradient(180deg, #000, transparent 84%);
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 1px solid var(--line-hard);
  border-radius: var(--radius);
  padding: clamp(18px, 2.4vw, 28px) clamp(15px, 2.2vw, 32px) clamp(18px, 2.6vw, 30px);
  background: rgba(11, 27, 51, 0.66);
  box-shadow: 8px 8px 0 -1px rgba(201, 111, 74, 0.3), 17px 17px 0 -3px rgba(201, 111, 74, 0.11);
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  opacity: 0.45;
  background-image: repeating-linear-gradient(180deg, var(--stone) 0 1px, transparent 1px 13px);
}

.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-size: 13px;
  color: var(--stone);
  font-family: var(--font-mono);
}

.page-faq .faq-crumb a {
  color: var(--cyan);
  text-decoration: none;
}

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

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  max-width: 20ch;
  font-family: var(--font-cond);
  font-size: clamp(30px, 5.4vw, 56px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 660px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(239, 233, 220, 0.78);
}

.page-faq .faq-filters {
  display: flex;
  gap: 10px;
  margin-top: 22px;
  padding-bottom: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-chip {
  flex: 0 0 auto;
  transform: skewX(var(--faq-skew));
  padding: 8px 17px;
  border: 1px solid var(--line-hard);
  border-radius: 2px;
  background: rgba(30, 58, 95, 0.55);
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-faq .faq-chip > span {
  display: inline-block;
  transform: skewX(calc(-1 * var(--faq-skew)));
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  background: rgba(57, 255, 136, 0.12);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 42px);
  margin-top: clamp(26px, 4vw, 50px);
}

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

.page-faq .faq-index__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--stone);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px 9px 14px;
  border-left: 1px solid var(--line-soft);
  color: rgba(239, 233, 220, 0.72);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--stone);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--lime);
  border-left-color: var(--lime);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(28px, 4.4vw, 52px);
  scroll-margin-top: calc(var(--topbar-h) + 18px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-hard);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--font-cond);
  font-size: clamp(22px, 3.4vw, 33px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-faq .faq-group__lead {
  margin: 14px 0 18px;
  max-width: 680px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(239, 233, 220, 0.74);
}

.page-faq .faq-figure {
  margin: 0 0 20px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--steel);
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s var(--ease);
}

.page-faq .qa[open]::before {
  transform: scaleY(1);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 6px 16px 15px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.2;
  color: var(--cyan);
}

.page-faq .qa[open] summary::after {
  content: "\2013";
  color: var(--lime);
}

.page-faq .qa[open] summary {
  color: var(--lime);
}

.page-faq .qa__body {
  max-width: 680px;
  padding: 0 6px 20px 15px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(239, 233, 220, 0.8);
}

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

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

.page-faq .hl {
  color: var(--lime);
  padding-bottom: 1px;
  border-bottom: 1px solid rgba(57, 255, 136, 0.5);
}

/* ---------- 费用卡阶梯 ---------- */
.page-faq .fee-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 12px;
  margin: 0 0 22px;
}

.page-faq .fee-card {
  position: relative;
  padding: 16px 16px 18px;
  border: 1px solid var(--line-hard);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(30, 58, 95, 0.62), rgba(11, 27, 51, 0.78));
}

.page-faq .fee-card--year {
  border-color: rgba(57, 255, 136, 0.45);
  background: linear-gradient(180deg, rgba(47, 122, 92, 0.36), rgba(11, 27, 51, 0.8));
}

.page-faq .fee-card__label {
  display: block;
  font-size: 13px;
  color: var(--stone);
}

.page-faq .fee-card__num {
  display: block;
  margin: 8px 0 2px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 600;
  line-height: 1;
  color: var(--lime);
}

.page-faq .fee-card__unit {
  display: block;
  font-size: 13px;
  color: rgba(239, 233, 220, 0.7);
}

/* ---------- 客服通道 ---------- */
.page-faq .contact-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0 0 22px;
}

.page-faq .contact-strip__item {
  padding: 4px 0 4px 14px;
  border-left: 2px solid var(--clay);
}

.page-faq .contact-strip__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-faq .contact-strip__value {
  margin: 0 0 8px;
}

.page-faq .contact-strip__value .copy-chip {
  font-family: var(--font-mono);
  font-size: 15px;
}

.page-faq .contact-strip__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--stone);
}

/* ---------- 问题升级 ---------- */
.page-faq .faq-group--last {
  margin-bottom: 0;
}

.page-faq .faq-escalate {
  position: relative;
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid var(--line-hard);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(34, 211, 238, 0.1), rgba(11, 27, 51, 0.7) 62%);
  box-shadow: 6px 6px 0 -1px rgba(201, 111, 74, 0.28);
}

.page-faq .faq-escalate p {
  margin: 0 0 16px;
  max-width: 660px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(239, 233, 220, 0.82);
}

.page-faq .faq-escalate__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 0 !important;
}

/* ---------- 响应式 ---------- */
@media (max-width: 899px) {
  .page-faq .faq-index__list {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    padding-bottom: 6px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  .page-faq .faq-index__list li {
    flex: 0 0 auto;
  }

  .page-faq .faq-index__list a {
    border-left: 0;
    border-bottom: 1px solid var(--line-soft);
    padding: 7px 12px;
    white-space: nowrap;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
  }

  .page-faq .contact-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-faq .fee-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa::before,
  .page-faq .qa summary,
  .page-faq .faq-chip {
    transition: none;
  }
}