.page-faq {
  --faq-rail-w: 218px;
  background-color: var(--ink-950);
  color: var(--paper-050);
  padding-bottom: clamp(48px, 8vw, 104px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: clamp(16px, 3vw, 30px);
}
.page-faq .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted-400);
}
.page-faq .breadcrumbs__list li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--line-700);
}
.page-faq .breadcrumbs__list a {
  color: var(--muted-400);
  text-decoration: none;
  transition: color .2s var(--ease);
}
.page-faq .breadcrumbs__list a:hover,
.page-faq .breadcrumbs__list a:focus-visible {
  color: var(--cyan-300);
}
.page-faq .breadcrumbs__list a[aria-current="page"] {
  color: var(--cyan-500);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 5vw, 46px) 0 clamp(30px, 5vw, 52px);
  border-bottom: 1px solid var(--line-700);
  background-image:
    radial-gradient(120% 150% at 90% 0%, rgba(47, 230, 196, .10), transparent 58%),
    radial-gradient(90% 130% at 0% 110%, rgba(255, 95, 46, .07), transparent 62%);
}
.page-faq .faq-hero__eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--amber-400);
}
.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(31px, 6.6vw, 58px);
  line-height: 1.04;
  letter-spacing: -.015em;
}
.page-faq .faq-hero__lede {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: clamp(15.5px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--paper-050);
}
.page-faq .faq-hero__note {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 8px 15px;
  border: 1px solid var(--line-700);
  border-radius: 999px;
  background-color: rgba(18, 38, 31, .62);
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--muted-400);
}
.page-faq .faq-hero__note::before {
  content: "";
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--amber-600);
  animation: faqPulse 2.6s var(--ease) infinite;
}
@keyframes faqPulse {
  0%   { box-shadow: 0 0 0 0 rgba(255, 95, 46, .5); }
  70%  { box-shadow: 0 0 0 9px rgba(255, 95, 46, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 95, 46, 0); }
}

/* ---------- 骨架 ---------- */
.page-faq .faq-wrap {
  max-width: var(--shell-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

/* ---------- 分类轨道 ---------- */
.page-faq .faq-rail {
  position: sticky;
  top: var(--header-h);
  z-index: 4;
  margin-inline: calc(var(--gutter) * -1);
  padding: 10px 0;
  border-top: 1px solid var(--line-700);
  border-bottom: 1px solid var(--line-700);
  background-color: var(--glass);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
}
.page-faq .faq-rail__label {
  display: none;
}
.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 var(--gutter);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .faq-rail__item {
  flex: 0 0 auto;
}
.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 15px;
  border: 1px solid var(--line-700);
  border-radius: 999px;
  color: var(--muted-400);
  font-size: 13.5px;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--cyan-300);
  border-color: rgba(47, 230, 196, .45);
  background-color: rgba(47, 230, 196, .07);
}
.page-faq .faq-rail__link:focus-visible {
  outline: 2px solid var(--focus-500);
  outline-offset: 2px;
}
.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--amber-400);
}

/* ---------- 章节 ---------- */
.page-faq .faq-body {
  min-width: 0;
}
.page-faq .faq-section {
  position: relative;
  padding: clamp(30px, 4.6vw, 52px) 0;
  scroll-margin-top: calc(var(--header-h) + 84px);
}
.page-faq .faq-section + .faq-section {
  border-top: 1px solid var(--line-700);
}
.page-faq .faq-section + .faq-section::before {
  content: "";
  position: absolute;
  top: 4px;
  left: 0;
  width: min(340px, 62%);
  height: 7px;
  background-image: repeating-linear-gradient(to right, var(--line-700) 0 1px, transparent 1px 14px);
  pointer-events: none;
}
.page-faq .faq-section__head {
  margin-bottom: clamp(18px, 3vw, 28px);
}
.page-faq .faq-section__index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan-500);
}
.page-faq .faq-section__title {
  margin: 0 0 12px;
  max-width: 28ch;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.3;
}
.page-faq .faq-section__lead {
  margin: 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted-400);
}

/* ---------- 三条上手路径 ---------- */
.page-faq .faq-paths {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}
.page-faq .faq-path {
  position: relative;
  padding: 20px 20px 16px;
  border: 1px solid var(--line-700);
  border-radius: 3px;
  background-color: var(--ink-900);
  overflow: hidden;
}
.page-faq .faq-path::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background-image: linear-gradient(180deg, var(--cyan-500), rgba(47, 230, 196, 0));
}
.page-faq .faq-path__step {
  margin: 0 0 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--amber-400);
}
.page-faq .faq-path h3 {
  margin: 0 0 9px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 21px;
  line-height: 1.26;
}
.page-faq .faq-path p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.74;
  color: var(--muted-400);
}
.page-faq .faq-path__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  color: var(--cyan-500);
  font-size: 14px;
  text-decoration: none;
  transition: color .2s var(--ease);
}
.page-faq .faq-path__link::after {
  content: "→";
  transition: transform .2s var(--ease);
}
.page-faq .faq-path__link:hover,
.page-faq .faq-path__link:focus-visible {
  color: var(--cyan-300);
}
.page-faq .faq-path__link:hover::after {
  transform: translateX(3px);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
  border: 1px solid var(--line-700);
  border-radius: 3px;
  background-color: var(--ink-900);
  overflow: hidden;
}
.page-faq .faq-figure::before {
  content: "";
  display: block;
  height: 6px;
  background-image: repeating-linear-gradient(to right, var(--line-700) 0 1px, transparent 1px 16px);
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-faq .faq-figure--wide img {
  aspect-ratio: 1100 / 733;
}
.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line-700);
  background-color: rgba(10, 26, 22, .62);
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--muted-400);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}
.page-faq .faq-item {
  border: 1px solid var(--line-700);
  border-radius: 3px;
  background-color: rgba(10, 26, 22, .74);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-faq .faq-item[open] {
  border-color: rgba(47, 230, 196, .4);
  background-color: var(--ink-800);
}
.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 48px;
  padding: 15px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.52;
  color: var(--paper-050);
}
.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item > summary::marker {
  content: "";
}
.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--focus-500);
  outline-offset: -2px;
}
.page-faq .faq-item__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.95;
  color: var(--cyan-500);
}
.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}
.page-faq .faq-item > summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 20px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.35;
  color: var(--amber-400);
}
.page-faq .faq-item[open] > summary::after {
  content: "−";
  color: var(--cyan-500);
}
.page-faq .faq-item__a {
  padding: 0 16px 16px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted-400);
}
.page-faq .faq-item__a::before {
  content: "";
  display: block;
  height: 1px;
  margin: 0 0 13px;
  background-image: linear-gradient(90deg, var(--line-700), rgba(31, 59, 51, 0));
}
.page-faq .faq-item__a p {
  margin: 0;
}
.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

/* ---------- 联系区 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 16px;
}
.page-faq .faq-contact__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--amber-400);
}
.page-faq .faq-contact__prep {
  padding: 20px;
  border: 1px solid var(--line-700);
  border-radius: 3px;
  background-color: var(--ink-900);
}
.page-faq .faq-contact__prep h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.35;
}
.page-faq .faq-prep {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 11px;
}
.page-faq .faq-prep li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted-400);
}
.page-faq .faq-prep li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 9px;
  height: 1px;
  background-color: var(--cyan-500);
}
.page-faq .faq-contact__card {
  padding: 20px;
  border: 1px solid var(--line-700);
  border-left: 3px solid var(--amber-600);
  border-radius: 3px;
  background-image: linear-gradient(180deg, rgba(18, 38, 31, .92), rgba(10, 26, 22, .92));
}
.page-faq .faq-contact__list {
  margin: 0;
  display: grid;
  gap: 11px;
}
.page-faq .faq-contact__list > div {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-bottom: 11px;
  border-bottom: 1px dashed var(--line-700);
}
.page-faq .faq-contact__list > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-faq .faq-contact__list dt {
  font-size: 13px;
  color: var(--muted-400);
}
.page-faq .faq-contact__list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--paper-050);
  overflow-wrap: anywhere;
}
.page-faq .faq-contact__note {
  margin: 16px 0 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted-400);
}

/* ---------- 滚动显现（渐进增强，无脚本时内容照常显示） ---------- */
.page-faq [data-reveal] {
  transition: opacity .28s var(--ease), transform .28s var(--ease);
}

/* ---------- 中等屏幕 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-item__a {
    padding-left: 52px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-wrap {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }
  .page-faq .faq-rail {
    top: calc(var(--header-h) + 28px);
    margin-inline: 0;
    padding: 16px 0 16px 20px;
    border-top: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line-700);
    background-color: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    overflow: visible;
  }
  .page-faq .faq-rail__label {
    display: block;
    margin: 0 0 16px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--muted-400);
  }
  .page-faq .faq-rail__list {
    display: block;
    padding: 0;
    overflow: visible;
  }
  .page-faq .faq-rail__item {
    position: relative;
    padding: 0;
  }
  .page-faq .faq-rail__item::before {
    content: "";
    position: absolute;
    top: 20px;
    left: -25px;
    width: 10px;
    height: 1px;
    background-color: var(--line-700);
    transition: width .2s var(--ease), background-color .2s var(--ease);
  }
  .page-faq .faq-rail__item:hover::before {
    width: 16px;
    background-color: var(--cyan-500);
  }
  .page-faq .faq-rail__link {
    display: flex;
    align-items: baseline;
    gap: 10px;
    min-height: 40px;
    padding: 0;
    border: 0;
    border-radius: 0;
    white-space: normal;
  }
  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    background-color: transparent;
  }
  .page-faq .faq-section {
    scroll-margin-top: calc(var(--header-h) + 32px);
  }
}

/* ---------- 宽屏错位 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    align-items: start;
  }
  .page-faq .faq-path:nth-child(2) {
    margin-top: 26px;
  }
  .page-faq .faq-path:nth-child(3) {
    margin-top: 52px;
  }
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 22px;
    align-items: start;
  }
  .page-faq .faq-contact__card {
    margin-top: 34px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__note::before {
    animation: none;
  }
  .page-faq [data-reveal],
  .page-faq .faq-path__link::after,
  .page-faq .faq-rail__link,
  .page-faq .faq-rail__item::before,
  .page-faq .faq-item {
    transition: none;
  }
}
</final>