.page-faq {
  --faq-rail: 280px;
  --faq-gap: clamp(28px, 4vw, 56px);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: clip;
  padding: clamp(36px, 6vw, 80px) 0 clamp(24px, 4vw, 52px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -14%;
  width: min(58vw, 620px);
  aspect-ratio: 1 / 1;
  background:
    radial-gradient(circle at 32% 34%, rgba(53, 224, 200, 0.20), transparent 62%),
    linear-gradient(150deg, rgba(255, 179, 71, 0.10), transparent 58%);
  clip-path: polygon(100% 0, 100% 100%, 0 50%);
  pointer-events: none;
}

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

.page-faq .faq-hero-grid {
  display: grid;
  gap: 30px;
  margin-top: clamp(20px, 3vw, 34px);
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: end;
    gap: clamp(32px, 4vw, 64px);
  }
}

.page-faq .faq-hero-copy .lede {
  max-width: 58ch;
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-hero-aside {
  border: 1px solid var(--edge);
  background: linear-gradient(165deg, rgba(14, 48, 42, 0.75), rgba(7, 17, 15, 0.9));
  padding: 20px 20px 6px;
  box-shadow: var(--shadow);
}

.page-faq .faq-quicklist {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--edge);
}

.page-faq .faq-quicklist li {
  background: var(--char);
  padding: 13px 14px;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.65;
  color: var(--sage);
}

.page-faq .faq-quicklist .mono {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.12em;
}

/* ---------- 三步引导 ---------- */
.page-faq .faq-steps-head {
  display: grid;
  gap: 26px;
}

@media (min-width: 900px) {
  .page-faq .faq-steps-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    align-items: center;
    gap: clamp(30px, 4vw, 58px);
  }
}

.page-faq .faq-step-media {
  margin: 0;
  border: 1px solid var(--edge);
  background: linear-gradient(150deg, var(--deep-a), var(--deep-b));
  padding: 10px;
}

.page-faq .faq-steps {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--edge);
  border: 1px solid var(--edge);
}

@media (min-width: 800px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-step {
  position: relative;
  background: linear-gradient(160deg, var(--deep-a), var(--char) 62%);
  padding: clamp(22px, 2.6vw, 32px);
  display: grid;
  align-content: start;
  gap: 12px;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 42px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .faq-step:nth-child(2)::before {
  background: var(--amber);
}

.page-faq .faq-step:nth-child(3)::before {
  background: var(--rose);
}

.page-faq .faq-step-num {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-faq .faq-step h3 {
  margin: 0;
  font-size: clamp(19px, 2vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--sage);
}

.page-faq .faq-step .tag {
  justify-self: start;
  margin-top: 4px;
}

/* ---------- 问答区 ---------- */
.page-faq .faq-sect-head {
  max-width: 66ch;
  margin-bottom: clamp(26px, 3.4vw, 44px);
}

.page-faq .faq-split {
  display: grid;
  gap: 26px;
}

@media (min-width: 1000px) {
  .page-faq .faq-split {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--frame-top) + 30px);
  }
}

.page-faq .faq-rail {
  align-self: start;
  border: 1px solid var(--edge);
  background: rgba(20, 22, 26, 0.72);
  padding: 18px;
  display: grid;
  gap: 16px;
  box-shadow: var(--shadow);
}

.page-faq .faq-rail .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-index ul {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 10px;
  font-size: 14px;
  color: var(--sage);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index a .mono {
  font-size: 12px;
  color: var(--edge);
  transition: color 0.2s var(--ease);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--mist);
  border-left-color: var(--cyan);
  background: rgba(53, 224, 200, 0.07);
}

.page-faq .faq-index a:hover .mono,
.page-faq .faq-index a:focus-visible .mono {
  color: var(--cyan);
}

.page-faq .faq-stream {
  min-width: 0;
  display: grid;
  gap: clamp(28px, 3.4vw, 44px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 0;
}

.page-faq [data-filter-item][hidden] {
  display: none !important;
}

.page-faq .faq-group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--edge);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--sage);
}

.page-faq .faq-group-title::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(53, 224, 200, 0.85);
}

.page-faq .faq-group .accordion {
  display: grid;
  gap: 1px;
  background: var(--edge);
  border: 1px solid var(--edge);
}

.page-faq .accordion-item {
  position: relative;
  background: var(--char);
}

.page-faq .accordion-item[hidden] {
  display: none;
}

.page-faq .accordion-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.32s var(--ease);
}

.page-faq .accordion-item:has(.accordion-trigger[aria-expanded="true"])::before {
  transform: scaleY(1);
}

.page-faq .accordion-trigger {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 20px;
  background: transparent;
  border: 0;
  color: var(--mist);
  font: inherit;
  font-size: clamp(15px, 1.6vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .accordion-trigger:hover,
.page-faq .accordion-trigger:focus-visible {
  color: var(--cyan);
  background: rgba(53, 224, 200, 0.05);
}

.page-faq .accordion-trigger::after {
  content: "+";
  flex: none;
  font-family: var(--mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: color 0.2s var(--ease);
}

.page-faq .accordion-trigger[aria-expanded="true"] {
  color: var(--mist);
}

.page-faq .accordion-trigger[aria-expanded="true"]::after {
  content: "−";
  color: var(--amber);
}

.page-faq .accordion-panel {
  padding: 0 20px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sage);
}

.page-faq .accordion-panel p {
  margin: 0;
  max-width: 64ch;
}

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

.page-faq .faq-media {
  margin: 0;
  border: 1px solid var(--edge);
  background: linear-gradient(150deg, var(--deep-a), var(--deep-b));
  padding: 10px;
}

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

/* ---------- 收尾 ---------- */
.page-faq .faq-tail {
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(40px, 6vw, 76px) 0;
  border-top: 1px solid var(--edge);
  background: linear-gradient(150deg, rgba(14, 48, 42, 0.85), rgba(7, 17, 15, 0.95));
}

.page-faq .faq-tail-inner {
  display: grid;
  gap: 28px;
}

@media (min-width: 900px) {
  .page-faq .faq-tail-inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
    gap: clamp(32px, 5vw, 72px);
  }
}

.page-faq .faq-tail-copy .lede {
  max-width: 54ch;
}

.page-faq .faq-tail-copy .btn {
  margin-top: 26px;
}

.page-faq .faq-contacts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--edge);
  border: 1px solid var(--edge);
}

.page-faq .faq-contacts li {
  background: var(--char);
  padding: 13px 16px;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sage);
  overflow-wrap: anywhere;
}

.page-faq .faq-contacts .mono {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}