/* ============================================================
   帮助索引 · 页面专属样式（作用域：.page-faq）
   ============================================================ */

.page-faq {
  --faq-line: var(--grid-line);
  --faq-rail-top: 96px;
  background: var(--paper-cream);
  color: var(--body-ink);
}

.page-faq a {
  color: var(--glacier-blue);
}

.page-faq a:hover {
  color: var(--maple-red);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--glacier-ink);
  color: var(--snow-white);
  padding: 20px 0 clamp(64px, 9vw, 108px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), 0 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -130px;
  width: clamp(240px, 34vw, 440px);
  height: clamp(240px, 34vw, 440px);
  background: var(--glacier-deep);
  transform: rotate(14deg);
  opacity: 0.75;
  pointer-events: none;
}

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

.page-faq .faq-hero .breadcrumb,
.page-faq .faq-hero .breadcrumb a {
  color: var(--glacier-mid);
}

.page-faq .faq-hero .breadcrumb [aria-current="page"] {
  color: var(--snow-white);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(24px, 5vw, 56px);
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  color: var(--glacier-mid);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 18px;
  color: var(--snow-white);
  font-family: var(--font-display);
  font-size: var(--fs-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.01em;
  max-width: 16em;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 42em;
  color: var(--glacier-mist);
  font-size: var(--fs-body);
  line-height: 1.85;
}

.page-faq .faq-coord {
  border: 1px solid rgba(111, 182, 204, 0.38);
  background: rgba(20, 56, 74, 0.55);
  padding: 18px 20px;
}

.page-faq .faq-coord__cap {
  margin: 0 0 10px;
  color: var(--glacier-mid);
  letter-spacing: 0.14em;
}

.page-faq .faq-coord__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-coord__list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 8px 0;
  border-top: 1px solid rgba(111, 182, 204, 0.22);
  font-size: var(--fs-xs);
}

.page-faq .faq-coord__k {
  color: var(--glacier-mid);
}

.page-faq .faq-coord__v {
  font-family: var(--font-mono);
  color: var(--snow-white);
  white-space: nowrap;
}

/* ---------- 三步路径 ---------- */

.page-faq .faq-route {
  background: var(--snow-white);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-route__kicker {
  margin: 0;
  color: var(--glacier-blue);
  letter-spacing: 0.14em;
}

.page-faq .faq-route__h {
  margin: 10px 0 clamp(22px, 3vw, 34px);
  font-family: var(--font-display);
  font-size: var(--fs-title);
  font-weight: 800;
  line-height: 1.16;
  color: var(--glacier-ink);
}

.page-faq .faq-route__svg {
  display: none;
  width: 100%;
  height: 84px;
}

.page-faq .faq-route__line {
  fill: none;
  stroke: var(--glacier-blue);
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}

.page-faq .faq-route__node {
  fill: var(--snow-white);
  stroke: var(--maple-red);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

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

.page-faq .faq-step {
  border-left: 2px solid var(--glacier-mid);
  margin-left: 6px;
  padding: 0 0 22px 18px;
}

.page-faq .faq-step:last-child {
  padding-bottom: 0;
}

.page-faq .faq-step__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  color: var(--snow-white);
  background: var(--maple-red);
  padding: 2px 7px;
}

.page-faq .faq-step__t {
  margin: 12px 0 8px;
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--glacier-ink);
}

.page-faq .faq-step__d {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--body-ink);
}

/* ---------- 路径示意图 ---------- */

.page-faq .faq-banner {
  padding: clamp(28px, 4vw, 48px) 0;
  background: var(--glacier-mist);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-banner__frame {
  margin: 0;
  aspect-ratio: 16 / 7;
  overflow: hidden;
  background: var(--glacier-ink);
  border: 1px solid var(--glacier-mid);
}

.page-faq .faq-banner__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
}

.page-faq .faq-banner__cap {
  margin: 12px 0 0;
  color: var(--glacier-deep);
}

/* ---------- 问答主体 ---------- */

.page-faq .faq-body {
  padding: clamp(40px, 6vw, 80px) 0 clamp(48px, 7vw, 96px);
  background: var(--paper-cream);
}

.page-faq .faq-body__kicker {
  margin: 0;
  color: var(--maple-red);
  letter-spacing: 0.16em;
}

.page-faq .faq-body__h {
  margin: 10px 0 clamp(26px, 4vw, 42px);
  font-family: var(--font-display);
  font-size: var(--fs-title);
  font-weight: 800;
  line-height: 1.16;
  color: var(--glacier-ink);
}

.page-faq .faq-layout {
  display: grid;
  gap: 32px;
}

.page-faq .faq-rail {
  display: none;
}

.page-faq .faq-rail__cap {
  margin: 0 0 10px;
  color: var(--glacier-blue);
  letter-spacing: 0.14em;
}

.page-faq .faq-rail .index-rail__link {
  display: block;
  padding: 7px 0;
  font-size: var(--fs-sm);
  line-height: 1.5;
  text-decoration: none;
  color: var(--glacier-deep);
  border-bottom: 1px solid transparent;
}

.page-faq .faq-rail .index-rail__link[aria-current="true"] {
  color: var(--maple-red);
  border-bottom-color: var(--maple-red);
}

.page-faq .faq-group {
  border-top: 1px solid var(--faq-line);
  padding-top: 22px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 4vw, 52px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.page-faq .faq-group__h {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--glacier-ink);
}

/* ---------- 折叠问答 ---------- */

.page-faq .qa {
  border-bottom: 1px solid var(--faq-line);
  background: transparent;
}

.page-faq .qa:first-of-type {
  border-top: 1px solid var(--faq-line);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 2px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-body);
  font-weight: 600;
  line-height: 1.6;
  color: var(--glacier-ink);
}

.page-faq .qa__q::-webkit-details-marker {
  display: none;
}

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q:hover {
  color: var(--glacier-blue);
}

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-body);
  color: var(--glacier-blue);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
  color: var(--maple-red);
}

.page-faq .qa[open] .qa__q {
  color: var(--glacier-ink);
}

.page-faq .qa__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.06em;
  color: var(--glacier-mid);
  padding-top: 2px;
}

.page-faq .qa[open] .qa__idx {
  color: var(--maple-red);
}

.page-faq .qa__t {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__a {
  padding: 0 2px 18px clamp(0px, 4vw, 46px);
}

.page-faq .qa__a p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--body-ink);
  max-width: 44em;
}

.page-faq .qa__a p + p {
  margin-top: 0.8em;
}

/* ---------- 人工协助 ---------- */

.page-faq .faq-handoff {
  background: var(--glacier-ink);
  color: var(--glacier-mist);
  padding: clamp(40px, 6vw, 80px) 0;
}

.page-faq .faq-handoff__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-handoff__kicker {
  margin: 0;
  color: var(--glacier-mid);
  letter-spacing: 0.16em;
}

.page-faq .faq-handoff__h {
  margin: 10px 0 14px;
  color: var(--snow-white);
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
}

.page-faq .faq-handoff__d {
  margin: 0 0 22px;
  max-width: 38em;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--glacier-mist);
}

.page-faq .faq-handoff__acts {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.page-faq .faq-handoff__link {
  font-size: var(--fs-sm);
  color: var(--glacier-mid);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 182, 204, 0.5);
  padding-bottom: 2px;
}

.page-faq .faq-handoff__link:hover {
  color: var(--snow-white);
  border-bottom-color: var(--maple-red);
}

.page-faq .faq-handoff__fig {
  margin: 0;
  aspect-ratio: 2 / 1;
  overflow: hidden;
  border: 1px solid rgba(111, 182, 204, 0.3);
  background: var(--glacier-deep);
}

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

/* ---------- 断点 ---------- */

@media (min-width: 860px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(240px, 0.85fr);
    align-items: end;
  }

  .page-faq .faq-route__svg {
    display: block;
    margin-bottom: -16px;
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 24px;
  }

  .page-faq .faq-step {
    border-left: 0;
    border-top: 1px solid var(--glacier-mid);
    margin-left: 0;
    padding: 18px 24px 0 0;
  }

  .page-faq .faq-step:last-child {
    padding-right: 0;
  }

  .page-faq .faq-route__svg {
    margin-bottom: -10px;
  }

  .page-faq .faq-banner__frame img {
    height: 100%;
    aspect-ratio: auto;
  }

  .page-faq .faq-handoff__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: var(--faq-rail-top);
    align-self: start;
    padding-left: 14px;
    border-left: 1px solid var(--faq-line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__q {
    transition: none;
  }
}
<<<END>>>