.page-faq {
  --faq-tint: rgba(47, 230, 200, 0.12);
  --faq-warm: rgba(255, 107, 44, 0.14);
  background: var(--white);
  color: var(--graphite);
}

.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 26px);
}

.page-faq .eyebrow {
  color: #5f706a;
}

.page-faq .eyebrow--on-dark {
  color: var(--amber);
}

/* ---------- hero ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4vw, 38px) 0 clamp(34px, 5vw, 62px);
  background:
    radial-gradient(120% 90% at 100% 0%, var(--faq-tint), transparent 62%),
    linear-gradient(180deg, rgba(221, 229, 223, 0.6), var(--white) 88%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: var(--line);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-faq .faq-hero__copy h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 8.6vw, 84px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-faq .faq-hero__lead {
  max-width: 54ch;
  margin: clamp(16px, 3vw, 24px) 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--graphite);
}

.page-faq .faq-hero__stats {
  display: grid;
  gap: 14px;
  padding: clamp(20px, 3vw, 28px);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--ink-2), var(--ink));
  color: var(--white);
  box-shadow: 0 22px 48px -34px rgba(11, 31, 26, 0.95);
}

.page-faq .faq-stat {
  display: grid;
  gap: 4px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .faq-stat--hot .faq-stat__num {
  color: var(--orange);
}

.page-faq .faq-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

/* ---------- 资料取用 ---------- */
.page-faq .faq-desk {
  padding: clamp(32px, 5vw, 60px) 0;
}

.page-faq .faq-desk__card {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(rgba(47, 230, 200, 0.05) 1px, transparent 1px) 0 0 / 100% 34px,
    linear-gradient(160deg, var(--ink), #0E2A23 62%, var(--ink-2));
  color: var(--white);
  overflow: hidden;
}

.page-faq .faq-desk__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-desk__lead {
  max-width: 52ch;
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-files {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
}

.page-faq .faq-file {
  display: grid;
  gap: 6px 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-file:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-file__name {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-faq .faq-file__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
}

.page-faq .faq-file__formats {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-pill {
  padding: 4px 10px;
  border: 1px solid rgba(47, 230, 200, 0.45);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .faq-desk__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-faq .faq-desk .btn--ghost {
  border-color: rgba(245, 247, 244, 0.35);
  color: var(--white);
}

.page-faq .faq-desk .btn--ghost:hover {
  border-color: var(--amber);
  color: var(--amber);
}

.page-faq .faq-desk .copy-btn.is-copied {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .faq-desk__figure {
  margin: 0;
}

.page-faq .faq-desk__figure img {
  border-radius: var(--radius-md);
}

/* ---------- 浏览区 ---------- */
.page-faq .faq-browser {
  padding: clamp(16px, 3vw, 28px) 0 clamp(40px, 6vw, 76px);
}

.page-faq .faq-browser__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-index {
  padding-bottom: 4px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #6b7d76;
}

.page-faq .faq-index__glyph {
  width: 18px;
  height: 18px;
  color: var(--orange);
}

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

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 13px;
  white-space: nowrap;
  color: var(--graphite);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--silver);
}

.page-faq .faq-index__link:hover {
  border-color: var(--amber);
  color: var(--ink);
}

.page-faq .faq-index__link.is-active,
.page-faq .faq-index__link[aria-current="true"] {
  border-color: var(--orange);
  background: var(--faq-warm);
  color: var(--ink);
}

.page-faq .faq-index__link.is-active .faq-index__num,
.page-faq .faq-index__link[aria-current="true"] .faq-index__num {
  color: var(--orange);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group + .faq-group,
.page-faq .faq-group + .faq-help {
  margin-top: clamp(30px, 4.5vw, 52px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--ink);
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-faq .faq-item {
  position: relative;
  margin-bottom: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--white);
  overflow: hidden;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--orange);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.22s var(--ease);
}

.page-faq .faq-item[data-open] {
  border-color: var(--line-strong);
  box-shadow: 0 14px 30px -26px rgba(11, 31, 26, 0.8);
}

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

.page-faq .faq-item__trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 17px 18px 17px 20px;
  border: 0;
  background: none;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.7vw, 16.5px);
  font-weight: 600;
  line-height: 1.6;
  text-align: left;
  color: var(--ink);
  cursor: pointer;
}

.page-faq .faq-item__trigger:hover {
  color: var(--ink-2);
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border-radius: 50%;
  background: var(--mist);
  transition: background 0.2s var(--ease);
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--ink);
  transition: transform 0.2s var(--ease);
}

.page-faq .faq-item__icon::before {
  width: 9px;
  height: 1.5px;
}

.page-faq .faq-item__icon::after {
  width: 1.5px;
  height: 9px;
}

.page-faq .faq-item[data-open] .faq-item__icon {
  background: var(--faq-warm);
}

.page-faq .faq-item[data-open] .faq-item__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-item__panel {
  padding: 0 20px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

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

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

.page-faq .faq-item__panel ul {
  display: grid;
  gap: 6px;
  margin: 0 0 12px;
  padding-left: 18px;
}

.page-faq .faq-item__panel li::marker {
  color: var(--orange);
}

.page-faq.js-ready .faq-item:not([data-open]) .faq-item__panel {
  display: none;
}

.page-faq .faq-group__figure {
  margin: clamp(18px, 3vw, 26px) 0 0;
}

.page-faq .faq-group__figure img {
  border-radius: var(--radius-md);
}

/* ---------- 仍需协助 ---------- */
.page-faq .faq-help__panel {
  display: grid;
  gap: clamp(22px, 3.4vw, 34px);
  padding: clamp(24px, 4vw, 44px);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--ink-2), var(--ink) 70%);
  color: var(--white);
}

.page-faq .faq-help__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .faq-help__text {
  max-width: 48ch;
  margin: 14px 0 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-related {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-related__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--white);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-faq .faq-related__link:hover {
  border-color: var(--cyan);
  background: rgba(47, 230, 200, 0.08);
  transform: translateX(2px);
}

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

.page-faq .faq-related__label {
  font-size: 14px;
  line-height: 1.6;
}

/* ---------- 渐显 ---------- */
.page-faq.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}

.page-faq.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-file {
    grid-template-columns: minmax(90px, 0.8fr) minmax(0, 2.4fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(270px, 0.85fr);
    align-items: end;
  }

  .page-faq .faq-desk__card {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-faq .faq-help__panel {
    grid-template-columns: minmax(0, 1.15fr) minmax(240px, 0.65fr);
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-browser__grid {
    grid-template-columns: minmax(180px, 2.4fr) minmax(0, 7.6fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    justify-content: flex-start;
    width: 100%;
    padding: 9px 0;
    border: 0;
    border-bottom: 1px dashed var(--line);
    border-radius: 0;
    font-size: 14px;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover {
    border-color: var(--amber);
    background: none;
  }

  .page-faq .faq-index__link.is-active,
  .page-faq .faq-index__link[aria-current="true"] {
    border-bottom-color: var(--orange);
    background: none;
    color: var(--ink);
  }

  .page-faq .faq-item__trigger {
    padding: 19px 22px 19px 24px;
  }

  .page-faq .faq-item__panel {
    padding: 0 24px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-faq.js-ready [data-reveal] {
    opacity: 1;
    transform: none;
  }
}