.page-faq {
  --faq-line: 1px solid var(--grid);
  display: block;
}

/* ===== 面包屑 ===== */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 22px 0 0;
  font-size: 13px;
  color: var(--mist);
}
.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color .2s var(--ease);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible { color: var(--lime); }
.page-faq .breadcrumb__sep { color: var(--mist); opacity: .5; }

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 5.2vw, 74px) 0 clamp(28px, 4.2vw, 54px);
  background:
    radial-gradient(115% 88% at 8% -6%, rgba(31, 111, 99, .60) 0%, rgba(31, 111, 99, 0) 58%),
    radial-gradient(72% 66% at 96% 8%, rgba(184, 255, 46, .12) 0%, rgba(184, 255, 46, 0) 62%);
}
.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(24px, 3.6vw, 46px);
}
.page-faq .faq-hero__title {
  margin: 10px 0 18px;
  font-size: clamp(29px, 5.4vw, 52px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ice);
  max-width: 19ch;
}
.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}
.page-faq .faq-hero__aside { padding: 0; }
.page-faq .faq-hero__aside-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}
.page-faq .faq-quick__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .faq-quick__list a {
  display: inline-block;
  padding: 7px 15px;
  border-radius: var(--radius-pill);
  border: var(--faq-line);
  background: rgba(27, 36, 34, .72);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.page-faq .faq-quick__list a:hover,
.page-faq .faq-quick__list a:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

/* ===== 主体布局 ===== */
.page-faq .faq-body { padding-bottom: clamp(60px, 8vw, 118px); }
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 42px);
}

/* ===== 左侧索引 ===== */
.page-faq .faq-index { align-self: start; }
.page-faq .faq-index .toc { display: grid; gap: 2px; }
.page-faq .faq-index .toc__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}
.page-faq .toc__link {
  display: block;
  padding: 9px 12px;
  border-radius: var(--radius-s);
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}
.page-faq .toc__link:hover,
.page-faq .toc__link:focus-visible {
  color: var(--ice);
  background: rgba(27, 36, 34, .82);
}
.page-faq .toc__link.is-active,
.page-faq .toc__link[aria-current] {
  color: var(--lime);
  border-left-color: var(--lime);
  background: rgba(27, 36, 34, .82);
}

/* ===== 内容区块 ===== */
.page-faq .faq-stream { min-width: 0; }
.page-faq .faq-block {
  padding: clamp(30px, 4vw, 52px) 0;
  border-top: var(--faq-line);
  scroll-margin-top: 112px;
}
.page-faq .faq-block:first-child { padding-top: 0; border-top: 0; }
.page-faq .faq-block:last-child { padding-bottom: 0; }

.page-faq .faq-block__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 12px;
}
.page-faq .faq-block__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--lime);
  padding-top: 5px;
}
.page-faq .faq-block__title {
  margin: 0;
  font-size: clamp(21px, 2.7vw, 30px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ice);
}
.page-faq .faq-block__lede {
  margin: 0 0 22px;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
}
.page-faq .faq-block__note {
  margin: 18px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}
.page-faq .faq-block__note a {
  color: var(--lime-soft);
  text-decoration: underline;
  text-decoration-color: rgba(184, 255, 46, .4);
  text-underline-offset: 3px;
}

/* ===== 双栏 ===== */
.page-faq .faq-block__cols {
  display: grid;
  gap: 22px;
  margin-bottom: 4px;
}

/* ===== 编号步骤 ===== */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-faq .faq-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 6px;
  padding: 15px 0;
}
.page-faq .faq-step + .faq-step { border-top: 1px dashed var(--grid); }
.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.5;
  color: var(--lime);
  letter-spacing: -.02em;
}
.page-faq .faq-step__text {
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ice);
  max-width: 44ch;
}
.page-faq .faq-step__text a {
  color: var(--lime-soft);
  text-decoration: underline;
  text-decoration-color: rgba(184, 255, 46, .42);
  text-underline-offset: 3px;
}
.page-faq .faq-step__text a:hover,
.page-faq .faq-step__text a:focus-visible { color: var(--lime); }

/* ===== 图片 ===== */
.page-faq .faq-figure {
  position: relative;
  margin: 0;
  border-radius: var(--radius-m);
  border: var(--faq-line);
  background: var(--panel);
  overflow: hidden;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}
.page-faq .faq-figure--login { aspect-ratio: 10 / 9; }
.page-faq .faq-figure--tablet { aspect-ratio: 3 / 2; }
.page-faq .faq-figure__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 22px 16px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  background: linear-gradient(to top, rgba(11, 42, 34, .94), rgba(11, 42, 34, 0));
}

/* ===== 要点列表 ===== */
.page-faq .faq-tips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-faq .faq-tips li {
  padding: 14px 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
  border-bottom: 1px dashed var(--grid);
}
.page-faq .faq-tips li:last-child { border-bottom: 0; }
.page-faq .faq-tips__key {
  display: block;
  margin-bottom: 4px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--orange);
}

/* ===== 术语 ===== */
.page-faq .faq-terms {
  margin: 0;
  display: grid;
  gap: 0;
}
.page-faq .faq-term {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: var(--faq-line);
}
.page-faq .faq-term:last-child { border-bottom: 0; }
.page-faq .faq-term dt {
  padding-left: 10px;
  border-left: 2px solid var(--lime);
  font-size: 16px;
  font-weight: 800;
  color: var(--ice);
}
.page-faq .faq-term dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ===== 反馈清单 ===== */
.page-faq .faq-check {
  list-style: none;
  margin: 0 0 4px;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-faq .faq-check li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 52ch;
}
.page-faq .faq-check li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 11px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--orange);
}

/* ===== 折叠问答 ===== */
.page-faq .faq-item {
  margin-top: 16px;
  border: var(--faq-line);
  border-radius: var(--radius-m);
  background: var(--panel);
  overflow: hidden;
}
.page-faq .faq-item > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ice);
  transition: color .2s var(--ease), background .2s var(--ease);
}
.page-faq .faq-item > summary::-webkit-details-marker { display: none; }
.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--lime);
}
.page-faq .faq-item[open] > summary::after { content: "−"; }
.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--lime-soft);
  background: rgba(46, 58, 55, .35);
}
.page-faq .faq-item[open] > summary { color: var(--lime); }
.page-faq .faq-item__body {
  margin: 0;
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 58ch;
  animation: faq-open .28s var(--ease);
}
@keyframes faq-open {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

/* ===== 联系方式 ===== */
.page-faq .faq-block--support .faq-block__lede { margin-bottom: 20px; }
.page-faq .faq-contact {
  display: grid;
  gap: 0;
  margin: 0 0 24px;
  border: var(--faq-line);
  border-radius: var(--radius-m);
  background:
    linear-gradient(140deg, rgba(31, 111, 99, .22) 0%, rgba(27, 36, 34, 0) 62%),
    var(--panel);
  overflow: hidden;
}
.page-faq .faq-contact .contact-item {
  display: grid;
  gap: 5px;
  padding: 16px 20px;
  border-bottom: var(--faq-line);
}
.page-faq .faq-contact .contact-item:last-child { border-bottom: 0; }
.page-faq .faq-contact .contact-item__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}
.page-faq .faq-contact .contact-item__value {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--ice);
  overflow-wrap: anywhere;
}

/* ===== 中屏 ===== */
@media (min-width: 720px) {
  .page-faq .faq-block__lede,
  .page-faq .faq-block__note { padding-left: 32px; }
  .page-faq .faq-block__cols {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: clamp(24px, 3vw, 40px);
    align-items: start;
  }
  .page-faq .faq-term {
    grid-template-columns: minmax(0, 158px) minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
    padding: 18px 0;
  }
}

/* ===== 大屏 ===== */
@media (min-width: 980px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
  }
  .page-faq .faq-hero__aside {
    border-left: var(--faq-line);
    padding-left: 24px;
  }
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(36px, 4.4vw, 76px);
  }
  .page-faq .faq-index {
    position: sticky;
    top: 112px;
    max-height: calc(100vh - 160px);
    overflow-y: auto;
  }
}

/* ===== 减少动态 ===== */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__body { animation: none; }
  .page-faq .faq-quick__list a,
  .page-faq .toc__link,
  .page-faq .faq-item > summary { transition: none; }
}