.page-faq {
  --faq-radius: 14px;
  --faq-gap: clamp(18px, 2.6vw, 34px);
  padding-bottom: clamp(40px, 7vw, 84px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: clamp(18px, 3vw, 34px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -26px 0 0 0;
  background-image:
    linear-gradient(rgba(74, 215, 209, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 215, 209, 0.06) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(130% 80% at 40% 0%, #000 0%, transparent 76%);
  mask-image: radial-gradient(130% 80% at 40% 0%, #000 0%, transparent 76%);
  pointer-events: none;
  z-index: -1;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 40px);
  align-items: center;
  margin-top: 18px;
}

.page-faq .faq-hero__copy .eyebrow {
  color: var(--blue);
  margin: 0;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-size: clamp(29px, 5.2vw, 52px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 62ch;
  color: var(--paper);
  font-size: 15.5px;
  line-height: 1.78;
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    rgba(74, 215, 209, 0.18) 0 1px,
    transparent 1px 64px
  );
  mix-blend-mode: screen;
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-hero__media img,
.page-faq .faq-panel__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-hero__media .media__caption,
.page-faq .faq-panel__media .media__caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--paper);
  padding: 10px 14px;
  border-top: 1px dashed var(--line);
}

/* ---------- 知识库主体 ---------- */
.page-faq .faq-board {
  margin-top: clamp(38px, 6vw, 74px);
}

.page-faq .faq-board__head .section-title {
  margin: 8px 0 0;
  font-size: clamp(23px, 3.4vw, 34px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-board__head .section-lede {
  margin: 12px 0 0;
  max-width: 66ch;
  color: var(--paper);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq .faq-tabs {
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-faq .tab-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .tab {
  flex: 0 0 auto;
  appearance: none;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--paper);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  padding: 11px 17px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.page-faq .tab:hover {
  color: var(--white);
  border-color: var(--blue);
  transform: translateY(-1px);
}

.page-faq .tab[aria-selected="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.page-faq .tab:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-faq .faq-panels {
  margin-top: clamp(18px, 2.4vw, 28px);
}

.page-faq .tab-panel[hidden] {
  display: none;
}

.page-faq .faq-panel__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-panel__media {
  margin: 0 0 clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

/* ---------- 问题索引 ---------- */
.page-faq .faq-index__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--blue);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: max-content;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 6px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--paper);
  font-size: 13.5px;
  line-height: 1.45;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--white);
  border-color: var(--lime);
  background: #1b2420;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  color: var(--lime);
}

/* ---------- 手风琴答案 ---------- */
.page-faq .faq-answers {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-faq .faq-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: border-color 0.18s ease;
}

.page-faq .faq-item:hover {
  border-color: #3b4740;
}

.page-faq .faq-item[open] {
  border-color: rgba(182, 255, 59, 0.5);
  background: #161d1a;
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  padding: 16px 50px 16px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--white);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

.page-faq .faq-item__body {
  padding: 0 18px 18px;
  color: var(--paper);
  font-size: 14.5px;
  line-height: 1.8;
}

.page-faq .faq-item__body p {
  margin: 0;
}

.page-faq .faq-item__body ul,
.page-faq .faq-item__body ol {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 6px;
}

.page-faq .faq-item__body > * + * {
  margin-top: 10px;
}

.page-faq .faq-item__body a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px dashed rgba(182, 255, 59, 0.55);
}

.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

.page-faq .hl {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 5px;
  background: var(--lime);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.9em;
  font-weight: 700;
  line-height: 1.5;
}

/* ---------- 仍未解决 ---------- */
.page-faq .faq-help {
  margin-top: clamp(40px, 6.5vw, 80px);
}

.page-faq .faq-help .cta-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(22px, 3.8vw, 42px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(255, 90, 31, 0.14), transparent 58%),
    radial-gradient(100% 120% at 0% 100%, rgba(74, 215, 209, 0.1), transparent 60%),
    var(--panel);
}

.page-faq .faq-help__text .eyebrow {
  color: var(--orange);
  margin: 0;
}

.page-faq .faq-help .cta-band__title {
  margin: 10px 0 0;
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-help__lede {
  margin: 12px 0 0;
  max-width: 54ch;
  color: var(--paper);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .faq-channels {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-channels li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}

.page-faq .faq-channels__key {
  flex: 0 0 76px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--blue);
}

.page-faq .faq-channels__val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-self: end;
}

/* ---------- 断点 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-faq .faq-panel__grid {
    grid-template-columns: 268px minmax(0, 1fr);
  }

  .page-faq .faq-index {
    border-right: 1px dashed var(--line);
    padding-right: 20px;
  }

  .page-faq .faq-index__list {
    grid-auto-flow: row;
    grid-auto-columns: auto;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    border-color: transparent;
    background: transparent;
    border-radius: 8px;
    white-space: normal;
  }

  .page-faq .faq-item > summary {
    font-size: 16px;
    padding: 18px 56px 18px 20px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-help .cta-band {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.85fr);
    align-items: center;
  }
}

@media (max-width: 520px) {
  .page-faq .faq-hero h1 {
    font-size: 28px;
  }

  .page-faq .faq-channels__key {
    flex: 0 0 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .tab,
  .page-faq .faq-item,
  .page-faq .faq-index__link {
    transition: none;
  }
}