.page-faq {
  --faq-radius: 3px;
  --faq-gap: clamp(1.25rem, 4vw, 3rem);
  display: block;
  background-color: var(--pitch);
  background-image:
    radial-gradient(120% 70% at 100% 0%, rgba(255, 94, 26, 0.12), transparent 62%),
    radial-gradient(90% 60% at 0% 100%, rgba(53, 199, 184, 0.08), transparent 60%);
  color: var(--white);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .guide-hero {
  position: relative;
  padding: clamp(1.75rem, 5vw, 4rem) 0 clamp(1.5rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
}

.page-faq .guide-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: min(48%, 540px);
  height: 100%;
  background-image: repeating-linear-gradient(118deg, rgba(234, 242, 238, 0.07) 0 1px, transparent 1px 16px);
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq .guide-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .hero-label {
  margin: 1rem 0 0;
  color: var(--heat);
  letter-spacing: 0.14em;
  font-size: 0.7rem;
  text-transform: uppercase;
}

.page-faq .guide-hero h1 {
  margin: 0.75rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 7.2vw, 3.4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 24ch;
}

.page-faq .guide-hero .lead {
  margin: 1.1rem 0 0;
  max-width: 62ch;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: rgba(234, 242, 238, 0.82);
}

.page-faq .hero-status {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-faq .hero-status li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: rgba(15, 58, 42, 0.6);
}

/* ---------- 主体两栏 ---------- */
.page-faq .guide-body {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(1.5rem, 5vw, 3.5rem);
  padding-bottom: clamp(2.5rem, 8vw, 6rem);
}

.page-faq .guide-index {
  display: grid;
  gap: 1.1rem;
  align-content: start;
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: rgba(15, 58, 42, 0.55);
}

.page-faq .guide-index .label {
  margin: 0;
  color: var(--mist);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-faq .nav-index {
  display: grid;
  gap: 0.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .nav-index a {
  display: block;
  padding: 0.55rem 0.7rem 0.55rem 0.85rem;
  border-left: 2px solid var(--line);
  color: var(--white);
  font-size: 0.9rem;
  line-height: 1.45;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.page-faq .nav-index a:hover,
.page-faq .nav-index a:focus-visible {
  border-left-color: var(--heat);
  background: rgba(255, 94, 26, 0.08);
}

.page-faq .nav-index a[aria-current="true"] {
  border-left-color: var(--heat);
  background: rgba(255, 94, 26, 0.1);
  color: var(--signal);
}

.page-faq .index-legend {
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line);
}

.page-faq .index-legend ul {
  display: grid;
  gap: 0.45rem;
  margin: 0.6rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.8125rem;
  color: var(--mist);
}

.page-faq .index-legend li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ---------- 问题块 ---------- */
.page-faq .guide-questions {
  display: grid;
  gap: clamp(1rem, 3vw, 1.75rem);
  min-width: 0;
}

.page-faq .qa-block {
  position: relative;
  min-width: 0;
  padding: clamp(1.1rem, 4vw, 2.25rem);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: linear-gradient(180deg, rgba(15, 58, 42, 0.92), rgba(10, 42, 31, 0.86));
  box-shadow: 0 22px 48px -34px var(--ink);
}

.page-faq .qa-block::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--heat), rgba(255, 94, 26, 0));
}

.page-faq .qa-head {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.page-faq .qa-head .section-index {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: rgba(255, 94, 26, 0.92);
}

.page-faq .qa-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.25rem, 4.4vw, 1.85rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.page-faq .status-pill {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin: 0;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(4, 17, 11, 0.5);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-faq .qa-block > p {
  margin: 0 0 1rem;
  max-width: 68ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(234, 242, 238, 0.84);
}

/* 步骤条 */
.page-faq .steps {
  display: grid;
  gap: 0.85rem;
  margin: 1.25rem 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-faq .steps > li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  padding: 0.9rem 0.95rem;
  border: 1px solid rgba(28, 92, 66, 0.75);
  border-left: 2px solid var(--heat);
  border-radius: var(--faq-radius);
  background: rgba(4, 17, 11, 0.3);
}

.page-faq .step-num {
  padding-top: 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--signal);
}

.page-faq .steps h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
}

.page-faq .steps p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(234, 242, 238, 0.78);
}

/* 勾选清单 */
.page-faq .check-list {
  display: grid;
  gap: 0.6rem;
  margin: 1.1rem 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-faq .check-list li {
  position: relative;
  padding-left: 1.6rem;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: rgba(234, 242, 238, 0.84);
}

.page-faq .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.55rem;
  height: 0.55rem;
  border: 2px solid var(--heat);
  border-radius: 50%;
  background: rgba(255, 94, 26, 0.18);
}

/* 同步说明 */
.page-faq .sync-notes {
  display: grid;
  gap: 0.75rem;
  margin: 1.1rem 0 1.25rem;
}

.page-faq .sync-notes > div {
  padding: 0.85rem 0.95rem;
  border-left: 2px solid var(--cyan);
  border-radius: 0 var(--faq-radius) var(--faq-radius) 0;
  background: rgba(53, 199, 184, 0.06);
}

.page-faq .sync-notes dt {
  margin-bottom: 0.3rem;
  font-weight: 700;
  color: var(--white);
}

.page-faq .sync-notes dd {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: rgba(234, 242, 238, 0.78);
}

.page-faq .inline-link {
  margin: 0;
  font-size: 0.875rem;
  color: var(--mist);
}

.page-faq .inline-link a,
.page-faq .guide-tip a,
.page-faq .contact-line a {
  color: var(--heat);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 94, 26, 0.45);
}

.page-faq .inline-link a:hover,
.page-faq .guide-tip a:hover,
.page-faq .contact-line a:hover {
  color: var(--signal);
  border-bottom-color: rgba(245, 217, 10, 0.6);
}

/* 资料清单 */
.page-faq .prep-list {
  display: grid;
  gap: 0.5rem;
  margin: 1.1rem 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-faq .prep-list li {
  display: grid;
  gap: 0.2rem;
  padding: 0.7rem 0.85rem;
  border: 1px dashed var(--line);
  border-radius: var(--faq-radius);
}

.page-faq .prep-list span {
  font-size: 0.9375rem;
  font-weight: 700;
}

.page-faq .prep-list em {
  font-style: normal;
  font-size: 0.8125rem;
  color: var(--mist);
}

/* 联系操作 */
.page-faq .contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  padding-top: 0.4rem;
}

.page-faq .contact-line {
  width: 100%;
  margin: 0 0 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--mist);
  word-break: break-all;
}

/* 折叠问答 */
.page-faq .qa-item {
  padding: 0.15rem 0;
  border-top: 1px solid rgba(28, 92, 66, 0.8);
}

.page-faq .qa-item summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  font-size: 0.9375rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--white);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-item summary::marker {
  content: "";
}

.page-faq .qa-item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--heat);
  transition: transform 0.18s ease;
}

.page-faq .qa-item[open] summary::after {
  content: "−";
}

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

.page-faq .qa-item p {
  margin: 0 0 0.9rem;
  padding-right: 0.5rem;
  max-width: 66ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(234, 242, 238, 0.78);
}

/* 图片容器 */
.page-faq .media-frame {
  margin: 1.25rem 0 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  overflow: hidden;
  background: var(--ink);
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 收尾提示 */
.page-faq .guide-tip {
  display: grid;
  gap: 0.5rem;
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--signal);
  border-radius: var(--faq-radius);
  background: rgba(245, 217, 10, 0.06);
}

.page-faq .guide-tip .label {
  color: var(--signal);
}

.page-faq .guide-tip p {
  margin: 0;
  max-width: 68ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(234, 242, 238, 0.84);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 960px) {
  .page-faq .guide-body {
    grid-template-columns: minmax(190px, 250px) minmax(0, 1fr);
    gap: clamp(1.5rem, 3vw, 2.75rem);
    align-items: start;
  }

  .page-faq .guide-index {
    position: sticky;
    top: 104px;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
  }

  .page-faq .qa-head {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: baseline;
    column-gap: 1.1rem;
    row-gap: 0.55rem;
  }

  .page-faq .qa-head .section-index {
    grid-column: 1;
    grid-row: 1;
    font-size: 2.6rem;
  }

  .page-faq .qa-head h2 {
    grid-column: 2;
    grid-row: 1;
  }

  .page-faq .qa-head .status-pill {
    grid-column: 2;
    grid-row: 2;
  }

  .page-faq .sync-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .page-faq .qa-block {
    padding: clamp(1.75rem, 2.6vw, 2.6rem);
  }

  .page-faq .qa-block::after {
    content: "";
    position: absolute;
    right: -1px;
    bottom: -1px;
    width: 26px;
    height: 26px;
    background: var(--pitch);
    clip-path: polygon(100% 0, 100% 100%, 0 100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .nav-index a,
  .page-faq .qa-item summary::after {
    transition: none;
  }
}