.page-faq {
  background: var(--paper);
  color: var(--text-1);
  font-family: var(--font-body);
  padding: 8px 0 16px;
}

.page-faq .breadcrumb {
  margin: 8px 0 20px;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: var(--font-display);
  letter-spacing: 0.01em;
}

.page-faq .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  border: 1px solid var(--ink);
  background: var(--paper-2);
  padding: 26px 20px 30px;
  margin-bottom: 44px;
}

.page-faq .faq-hero::before,
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border-style: solid;
  border-color: var(--amber);
  border-width: 0;
}

.page-faq .faq-hero::before {
  top: -1px;
  left: -1px;
  border-top-width: 2px;
  border-left-width: 2px;
}

.page-faq .faq-hero::after {
  bottom: -1px;
  right: -1px;
  border-bottom-width: 2px;
  border-right-width: 2px;
}

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

.page-faq .faq-hero__count {
  font-size: 12px;
  color: var(--text-2);
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.55rem, 4.4vw, 2.35rem);
  font-weight: 600;
  line-height: 1.32;
  color: var(--text-1);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-2);
}

.page-faq .faq-hero__hint {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 3px solid var(--cyan);
  font-size: 14px;
  line-height: 1.7;
  color: var(--teal);
}

/* ---------- 章节标题 ---------- */
.page-faq .faq-sub {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 18px;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-1);
}

.page-faq .faq-sub::before {
  content: "";
  flex: none;
  width: 16px;
  height: 2px;
  background: var(--amber);
}

/* ---------- 四步速查 ---------- */
.page-faq .faq-steps {
  margin-bottom: 56px;
}

.page-faq .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.page-faq .step {
  padding: 18px 16px 20px;
}

.page-faq .step + .step {
  border-top: 1px dashed var(--rule);
}

.page-faq .step__num {
  display: block;
  font-size: 13px;
  color: var(--teal);
  margin-bottom: 8px;
}

.page-faq .step__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-1);
}

.page-faq .step__text {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-2);
}

.page-faq .step__link {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 2px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .step__link:hover,
.page-faq .step__link:focus-visible {
  color: var(--ink);
  border-color: var(--amber);
}

/* ---------- 问答区 ---------- */
.page-faq .faq-area {
  margin-bottom: 56px;
}

.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
}

.page-faq .qa-group {
  background: var(--sand);
  padding: 22px 18px 10px;
  clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
}

.page-faq .qa-group__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 4px;
}

.page-faq .qa-group__num {
  font-size: 13px;
  color: var(--teal);
}

.page-faq .qa-group__title {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-1);
}

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

.page-faq .qa:last-child {
  border-bottom: 0;
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--text-1);
  transition: color 140ms var(--ease);
}

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

.page-faq .qa__q::before {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--teal);
}

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

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

.page-faq .qa__a {
  padding: 0 2px 16px 24px;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-2);
}

.page-faq .faq-nav {
  order: -1;
  border-left: 3px solid var(--cyan);
  padding-left: 14px;
}

.page-faq .faq-nav__label {
  margin: 0 0 8px;
  font-size: 12px;
  color: var(--text-2);
}

.page-faq .faq-nav__list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-nav__link {
  display: inline-block;
  white-space: nowrap;
  padding: 6px 10px;
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--text-1);
  text-decoration: none;
  background: var(--paper-2);
  border: 1px solid var(--rule);
  transition: background 140ms var(--ease), border-color 140ms var(--ease);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  background: var(--cyan);
  border-color: var(--teal);
  color: var(--ink);
}

.page-faq .faq-nav__note {
  display: none;
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-2);
}

/* ---------- 术语摘录 ---------- */
.page-faq .term-section {
  margin-bottom: 56px;
}

.page-faq .term-lede {
  margin: 0 0 24px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-2);
}

.page-faq .term-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-faq .term-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--rule);
}

.page-faq .term-item {
  padding: 12px 0 13px;
  border-bottom: 1px solid var(--rule);
}

.page-faq .term-item__key {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--teal);
}

.page-faq .term-item__val {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-2);
}

/* ---------- 自检流程 ---------- */
.page-faq .check-section {
  margin-bottom: 56px;
}

.page-faq .check-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-faq .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
  counter-reset: checkstep;
}

.page-faq .check-step {
  position: relative;
  padding-left: 18px;
  border-left: 3px solid var(--cyan);
}

.page-faq .check-step__num {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--teal);
}

.page-faq .check-step__title {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text-1);
}

.page-faq .check-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-2);
}

/* ---------- 图片 ---------- */
.page-faq .figure {
  margin: 0;
}

.page-faq .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--rule);
  background: var(--paper-2);
}

.page-faq .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-2);
}

/* ---------- 帮助区 ---------- */
.page-faq .help-band {
  background: var(--ink);
  color: var(--paper);
  padding: 30px 20px 34px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-faq .help-band__title {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 600;
  color: var(--paper);
}

.page-faq .help-band__lede {
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 244, 236, 0.78);
}

.page-faq .help-band__mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(247, 244, 236, 0.22);
}

.page-faq .help-band__addr {
  font-size: 15px;
  color: var(--amber-soft);
  word-break: break-all;
}

.page-faq .help-band__copy {
  font-family: var(--font-display);
  font-size: 13px;
  padding: 6px 12px;
  color: var(--paper);
  background: transparent;
  border: 1px solid var(--amber);
  cursor: pointer;
  transition: background 140ms var(--ease), color 140ms var(--ease);
}

.page-faq .help-band__copy:hover,
.page-faq .help-band__copy:focus-visible {
  background: var(--amber);
  color: var(--ink);
}

.page-faq .help-band__copy[data-copied="on"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
}

.page-faq .help-band__facts {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .help-band__facts li {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(247, 244, 236, 0.78);
}

.page-faq .help-band__facts .mono {
  display: inline-block;
  min-width: 42px;
  margin-right: 8px;
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .help-band__more {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 244, 236, 0.7);
}

.page-faq .help-band__link {
  color: var(--amber-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(227, 199, 132, 0.5);
}

.page-faq .help-band__link:hover,
.page-faq .help-band__link:focus-visible {
  color: var(--paper);
  border-color: var(--paper);
}

/* ---------- 宽屏 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: 36px 32px 40px;
  }

  .page-faq .term-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }

  .page-faq .qa-group {
    padding: 26px 24px 12px;
  }

  .page-faq .help-band {
    padding: 40px 36px 44px;
  }
}

@media (min-width: 860px) {
  .page-faq .step-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .step {
    padding: 22px 20px 24px;
  }

  .page-faq .step + .step {
    border-top: 0;
    border-left: 1px solid var(--rule);
  }

  .page-faq .check-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: 44px;
  }

  .page-faq .term-layout {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 208px;
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-nav {
    order: 0;
    position: sticky;
    top: 88px;
  }

  .page-faq .faq-nav__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-right: 0;
  }

  .page-faq .faq-nav__link {
    display: block;
    white-space: normal;
    background: transparent;
    border: 0;
    border-left: 2px solid transparent;
    padding: 6px 0 6px 10px;
  }

  .page-faq .faq-nav__link:hover,
  .page-faq .faq-nav__link:focus-visible {
    background: transparent;
    border-left-color: var(--amber);
    color: var(--ink);
  }

  .page-faq .faq-nav__note {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step__link,
  .page-faq .qa__q,
  .page-faq .faq-nav__link,
  .page-faq .help-band__copy {
    transition: none;
  }
}