.page-faq {
  --faq-line: rgba(58, 43, 34, .18);
  --faq-soft: rgba(58, 43, 34, .06);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ===== 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink);
  color: var(--white);
  padding-block: clamp(1.75rem, 5vw, 3.25rem) clamp(2.25rem, 5vw, 3.75rem);
  border-bottom: 3px solid var(--red);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    repeating-linear-gradient(118deg, transparent 0 26px, rgba(216, 166, 87, .06) 26px 28px),
    radial-gradient(120% 90% at 86% -12%, rgba(226, 58, 46, .3), transparent 62%);
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  margin: 0 0 clamp(1rem, 3vw, 1.75rem);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--cold);
}

.page-faq .breadcrumb a {
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--sand);
  border-color: var(--orange);
}

.page-faq .hero-ruler {
  height: 14px;
  margin-bottom: clamp(1.25rem, 3.5vw, 2rem);
  background: repeating-linear-gradient(90deg, var(--sand) 0 2px, transparent 2px 14px);
  border-bottom: 1px solid rgba(216, 166, 87, .45);
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 .6rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--sand);
}

.page-faq .faq-hero h1 {
  max-width: 18ch;
  margin: 0 0 clamp(1rem, 2.5vw, 1.5rem);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 7.5vw, 4.4rem);
  line-height: .98;
  letter-spacing: -.03em;
}

.page-faq .faq-hero h1 em {
  font-style: normal;
  color: var(--orange);
}

.page-faq .faq-lead {
  max-width: 58ch;
  margin: 0 0 clamp(1.5rem, 4vw, 2rem);
  font-size: clamp(1rem, 2.2vw, 1.05rem);
  line-height: 1.85;
  color: #E7DCD0;
}

.page-faq .hero-meta {
  list-style: none;
  margin: 0;
  padding: clamp(1rem, 2.5vw, 1.25rem) 0 0;
  border-top: 1px solid rgba(216, 166, 87, .45);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  font-size: .8rem;
  color: var(--cold);
}

.page-faq .hero-meta .mono {
  display: block;
  margin-bottom: .3rem;
  font-family: var(--font-mono);
  font-size: .95rem;
  letter-spacing: .02em;
  color: var(--white);
}

/* ===== 主体两栏 ===== */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3rem);
  max-width: var(--frame-w);
  margin-inline: auto;
  padding: clamp(2rem, 5vw, 3.5rem) var(--gutter) clamp(3rem, 6vw, 5rem);
}

/* ===== 左索引 ===== */
.page-faq .faq-index {
  border-top: 2px solid var(--ink);
  padding-top: .9rem;
}

.page-faq .index-title {
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--red-deep);
}

.page-faq .index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .1rem;
}

.page-faq .index-list a {
  display: flex;
  align-items: baseline;
  gap: .65rem;
  padding: .55rem .5rem .55rem .6rem;
  border-left: 2px solid transparent;
  color: var(--brown);
  text-decoration: none;
  font-size: .9rem;
  line-height: 1.5;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .index-list a:hover,
.page-faq .index-list a:focus-visible {
  border-left-color: var(--red);
  background: var(--faq-soft);
  color: var(--ink);
}

.page-faq .idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--sand);
  transition: color var(--dur) var(--ease);
}

.page-faq .index-list a:hover .idx,
.page-faq .index-list a:focus-visible .idx {
  color: var(--red);
}

.page-faq .index-note {
  margin: 1.1rem 0 0;
  padding-top: .85rem;
  border-top: 1px dashed var(--sand);
  font-size: .8rem;
  line-height: 1.7;
  color: var(--brown);
}

/* ===== 章节通用 ===== */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h) + 1rem);
  margin-bottom: clamp(2.25rem, 5vw, 3.5rem);
}

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

.page-faq .section-bar {
  display: flex;
  align-items: baseline;
  gap: .85rem;
  padding-bottom: .7rem;
  margin-bottom: .85rem;
  border-bottom: 2px solid var(--ink);
}

.page-faq .section-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: .85rem;
  letter-spacing: .04em;
  color: var(--red);
}

.page-faq .section-bar h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-faq .section-bar::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  min-width: 1.5rem;
  background: var(--sand);
  opacity: .85;
}

.page-faq .section-intro {
  max-width: 62ch;
  margin: 0 0 1.1rem;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--brown);
}

/* ===== 折叠问答 ===== */
.page-faq .qa-list {
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .qa-item summary {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: .95rem .25rem .95rem .1rem;
  list-style: none;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease), background var(--dur) var(--ease);
}

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

.page-faq .qa-item summary::before {
  content: "+";
  flex: none;
  width: 1.25rem;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--red);
}

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

.page-faq .qa-item summary:hover,
.page-faq .qa-item summary:focus-visible {
  color: var(--red-deep);
  padding-left: .5rem;
  background: var(--faq-soft);
}

.page-faq .qa-item[open] summary {
  color: var(--red-deep);
}

.page-faq .qa-body {
  max-width: 64ch;
  padding: 0 0 1.15rem 1.95rem;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--brown);
}

.page-faq .qa-body p {
  margin: 0 0 .7rem;
}

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

.page-faq .qa-body a {
  color: var(--red-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .qa-body a:hover,
.page-faq .qa-body a:focus-visible {
  color: var(--ink);
  border-color: var(--red);
}

/* ===== 四步卡 ===== */
.page-faq .step-grid {
  list-style: none;
  margin: 0 0 clamp(1.5rem, 3vw, 2rem);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--faq-line);
  border: 1px solid var(--faq-line);
}

.page-faq .step {
  position: relative;
  padding: 1.1rem 1rem 1.25rem;
  background: var(--paper);
  transition: background var(--dur) var(--ease);
}

.page-faq .step::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: transparent;
  transition: background var(--dur) var(--ease);
}

.page-faq .step:hover {
  background: var(--paper-2);
}

.page-faq .step:hover::before {
  background: var(--red);
}

.page-faq .step-num {
  display: block;
  margin-bottom: .7rem;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  line-height: 1;
  color: var(--sand);
  transition: color var(--dur) var(--ease);
}

.page-faq .step:hover .step-num {
  color: var(--red);
}

.page-faq .step h3 {
  margin: 0 0 .45rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .step p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--brown);
}

/* ===== 图片 ===== */
.page-faq .faq-figure {
  margin: 0 0 clamp(1.5rem, 3vw, 2rem);
  border: 1px solid var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  background: var(--paper-2);
  overflow: hidden;
}

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

.page-faq .faq-figure .media-caption {
  margin: 0;
  padding: .6rem .9rem;
  border-top: 1px solid var(--sand);
  font-family: var(--font-mono);
  font-size: .72rem;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--brown);
}

/* ===== 支持区 ===== */
.page-faq .support-band {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background: var(--night);
  color: var(--white);
  border-left: 4px solid var(--red);
}

.page-faq .support-band::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 160px;
  height: 160px;
  background: conic-gradient(from 45deg, rgba(242, 107, 29, .38), transparent 62%);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  opacity: .7;
  pointer-events: none;
}

.page-faq .section-bar--night {
  border-bottom-color: var(--sand);
  position: relative;
  z-index: 1;
}

.page-faq .section-bar--night h2 {
  color: var(--white);
}

.page-faq .section-bar--night .section-num {
  color: var(--orange);
}

.page-faq .section-bar--night::after {
  background: rgba(216, 166, 87, .5);
}

.page-faq .support-lead {
  position: relative;
  z-index: 1;
  max-width: 58ch;
  margin: 0 0 1.15rem;
  font-size: .95rem;
  line-height: 1.85;
  color: #E7DCD0;
}

.page-faq .prep-list {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0 0 1.1rem;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: .75rem;
}

.page-faq .prep-list li {
  display: flex;
  gap: .65rem;
  padding-bottom: .7rem;
  border-bottom: 1px solid rgba(216, 166, 87, .3);
  font-size: .9rem;
  line-height: 1.7;
  color: #E7DCD0;
}

.page-faq .prep-list .mono {
  flex: none;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--sand);
}

.page-faq .support-note {
  position: relative;
  z-index: 1;
  margin: 0 0 1.25rem;
  font-size: .85rem;
  line-height: 1.8;
  color: var(--cold);
}

.page-faq .support-contact {
  position: relative;
  z-index: 1;
  display: grid;
  gap: .4rem;
  padding: .9rem 1rem;
  border: 1px solid rgba(216, 166, 87, .45);
  background: rgba(27, 20, 16, .35);
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.7;
  color: var(--cold);
}

.page-faq .support-contact strong {
  display: block;
  margin-top: .15rem;
  font-weight: 500;
  color: var(--white);
  word-break: break-all;
}

.page-faq .support-actions {
  position: relative;
  z-index: 1;
  margin: 1.25rem 0 0;
}

.page-faq .support-actions .btn {
  display: inline-block;
  padding: .75rem 1.4rem;
  font-size: .9rem;
  text-decoration: none;
}

/* ===== 响应式 ===== */
@media (min-width: 640px) {
  .page-faq .hero-meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1rem, 4vw, 2.5rem);
  }

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

  .page-faq .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .75rem 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(200px, 250px) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    align-self: start;
  }
}

@media (min-width: 1100px) {
  .page-faq .step-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .index-list a,
  .page-faq .qa-item summary,
  .page-faq .step,
  .page-faq .step::before,
  .page-faq .step-num,
  .page-faq .breadcrumb a,
  .page-faq .qa-body a {
    transition: none;
  }
}