.page-faq {
  --faq-line: rgba(16, 28, 44, .14);
  --faq-line-lite: rgba(255, 249, 240, .18);
  --faq-mint-soft: rgba(77, 224, 193, .18);
  display: block;
  box-sizing: border-box;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(18px, 4vw, 44px) clamp(16px, 4vw, 40px) clamp(56px, 9vw, 108px);
  color: var(--ink);
  font-family: var(--font-sans);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: inherit;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-head {
  display: grid;
  gap: 14px;
  padding-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .crumbs {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--ink-45);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.page-faq .crumbs a {
  color: var(--ink-70);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .crumbs a:hover,
.page-faq .crumbs a:focus-visible {
  color: var(--flame);
  border-bottom-color: var(--flame);
}

.page-faq .faq-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--flame);
}

.page-faq .faq-title {
  margin: 0;
  font-size: clamp(1.9rem, 6.6vw, 4rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -.02em;
  max-width: 20ch;
  transform: skew(-1.5deg);
  transform-origin: left center;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 64ch;
  font-size: clamp(.94rem, 1.6vw, 1.02rem);
  line-height: 1.8;
  color: var(--ink-70);
}

.page-faq .faq-jump {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-faq .faq-jump__link {
  display: grid;
  gap: 5px;
  height: 100%;
  padding: 15px 16px 17px;
  background: var(--paper);
  border-left: 4px solid var(--flame);
  border-radius: var(--radius-m);
  color: var(--ink);
  text-decoration: none;
  box-shadow: 0 20px 44px -40px rgba(16, 28, 44, .9);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  transform: translateY(-3px);
  border-left-color: var(--mint);
}

.page-faq .faq-jump__link:focus-visible {
  outline: 2px solid var(--data-blue);
  outline-offset: 3px;
}

.page-faq .faq-jump__num {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--flame);
}

.page-faq .faq-jump__label {
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.3;
}

.page-faq .faq-jump__meta {
  font-size: .78rem;
  color: var(--ink-45);
}

/* ---------- 主布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  margin-top: clamp(26px, 4vw, 52px);
}

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

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--stone);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-left: 1px solid var(--faq-line);
}

.page-faq .faq-rail__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 8px 0 8px 14px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: .86rem;
  color: var(--ink-70);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--flame);
  border-left-color: var(--flame);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--stone);
}

.page-faq .faq-rail__note {
  margin: 22px 0 0;
  padding: 12px 14px;
  font-size: .76rem;
  line-height: 1.6;
  color: var(--ink-70);
  background: var(--sand);
  border-radius: var(--radius-s);
  border-top: 2px solid var(--clay);
}

.page-faq .faq-body {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  min-width: 0;
}

/* ---------- 章节面板 ---------- */
.page-faq .faq-sec {
  padding: clamp(20px, 3.6vw, 40px);
  background: var(--paper);
  border-radius: var(--radius-l) var(--radius-s) var(--radius-l) var(--radius-s);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-sec--bare {
  padding: 0;
  background: transparent;
  border-radius: 0;
  box-shadow: none;
}

.page-faq .faq-sec--ink {
  background: var(--ink);
  color: var(--paper);
}

.page-faq .faq-sec__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(16px, 2.6vw, 26px);
}

.page-faq .faq-sec__idx {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--flame);
}

.page-faq .faq-sec__idx::after {
  content: "";
  width: 44px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--grad-a), var(--grad-b));
}

.page-faq .faq-sec__title {
  margin: 0;
  font-size: clamp(1.35rem, 3.6vw, 2.1rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-faq .faq-sec__desc {
  margin: 0;
  max-width: 62ch;
  font-size: .94rem;
  line-height: 1.78;
  color: var(--ink-70);
}

.page-faq .faq-sec--ink .faq-sec__desc {
  color: var(--paper-70);
}

.page-faq .faq-sec--ink .faq-sec__idx::after {
  background: linear-gradient(90deg, var(--mint), var(--data-blue));
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-m);
  object-fit: cover;
  background: var(--sand);
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-size: .78rem;
  line-height: 1.6;
  color: var(--ink-45);
}

.page-faq .faq-sec--ink .faq-figure figcaption {
  color: var(--paper-70);
}

/* ---------- 步骤卡 ---------- */
.page-faq .faq-step {
  margin-bottom: 8px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-m);
  background: var(--paper);
  overflow: hidden;
}

.page-faq .faq-step > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: .95rem;
  line-height: 1.4;
}

.page-faq .faq-step > summary::-webkit-details-marker,
.page-faq .faq-qa > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-step > summary:focus-visible {
  outline: 2px solid var(--data-blue);
  outline-offset: -2px;
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--flame);
  border: 1px solid var(--faq-line);
  border-radius: 6px;
  padding: 2px 7px;
  flex: none;
}

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

.page-faq .faq-step__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px var(--faq-mint-soft);
}

.page-faq .faq-step[open] .faq-step__dot {
  background: var(--flame);
  box-shadow: 0 0 0 4px rgba(240, 78, 35, .14);
}

.page-faq .faq-step__body {
  padding: 0 16px 16px;
}

.page-faq .faq-step__body p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: var(--ink-70);
}

/* ---------- 提示条 ---------- */
.page-faq .faq-note {
  margin: 16px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--flame);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  background: rgba(240, 78, 35, .07);
  font-size: .85rem;
  line-height: 1.75;
  color: var(--ink-70);
}

.page-faq .faq-note--ink {
  border-left-color: var(--mint);
  background: rgba(77, 224, 193, .09);
  color: var(--paper-70);
}

.page-faq .faq-note a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-sec--ink .faq-note a:hover {
  color: var(--mint);
}

/* ---------- 刷新流程 ---------- */
.page-faq .faq-flow {
  counter-reset: faqflow;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-flow > li {
  counter-increment: faqflow;
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--paper-70);
}

.page-faq .faq-flow > li::before {
  content: counter(faqflow, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  text-align: center;
  padding: 3px 0;
  color: var(--mint);
  border: 1px solid var(--faq-line-lite);
  border-radius: 8px;
}

/* ---------- 密度卡 ---------- */
.page-faq .faq-density {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.page-faq .faq-density__item {
  display: grid;
  gap: 6px;
  padding: 16px;
  border-radius: var(--radius-m);
  background: var(--sand);
  border-top: 3px solid var(--clay);
}

.page-faq .faq-density__item:nth-child(2) {
  border-top-color: var(--flame);
}

.page-faq .faq-density__item:nth-child(3) {
  border-top-color: var(--data-blue);
}

.page-faq .faq-density__name {
  font-size: 1rem;
  font-weight: 800;
}

.page-faq .faq-density__desc {
  font-size: .86rem;
  line-height: 1.7;
  color: var(--ink-70);
}

/* ---------- 比例/字号对照 ---------- */
.page-faq .faq-pairs {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.page-faq .faq-pair {
  display: grid;
  gap: 5px;
  padding: 15px 16px;
  border-radius: var(--radius-m);
  background: var(--sand);
}

.page-faq .faq-pair__k {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--ember);
}

.page-faq .faq-pair__v {
  font-size: .87rem;
  line-height: 1.7;
  color: var(--ink-70);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding: clamp(16px, 2.4vw, 22px);
  margin-bottom: 14px;
  background: var(--paper);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-m);
  box-shadow: 0 20px 46px -44px rgba(16, 28, 44, .9);
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  padding-bottom: 10px;
  margin-bottom: 4px;
  border-bottom: 2px solid var(--faq-line);
}

.page-faq .faq-group__name {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: .01em;
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--stone);
}

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

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

.page-faq .faq-qa > summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 11px 0;
  cursor: pointer;
  list-style: none;
  font-size: .92rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
}

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

.page-faq .faq-qa > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: .95rem;
  line-height: 1;
  color: var(--flame);
  flex: none;
}

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

.page-faq .faq-qa p {
  margin: 0 0 14px;
  padding-right: 12px;
  font-size: .87rem;
  line-height: 1.78;
  color: var(--ink-70);
}

/* ---------- 联系前准备 ---------- */
.page-faq .faq-help {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-help > li {
  position: relative;
  padding-left: 26px;
  font-size: .9rem;
  line-height: 1.72;
  color: var(--paper-70);
}

.page-faq .faq-help > li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: .62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px var(--faq-mint-soft);
}

.page-faq .faq-contact {
  display: grid;
  gap: 10px;
  margin-top: 20px;
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--faq-line-lite);
  border-radius: var(--radius-m);
  background: var(--ink-2);
}

.page-faq .faq-contact__k {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--mint);
  flex: none;
  min-width: 62px;
}

.page-faq .faq-contact__v {
  font-family: var(--font-mono);
  font-size: .85rem;
  color: var(--paper);
  word-break: break-all;
  min-width: 0;
}

.page-faq .faq-contact__row .copy-btn {
  margin-left: auto;
  flex: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-density {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-faq .faq-contact__row {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-faq .faq-contact__row .copy-btn {
    margin-left: 0;
  }
}

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

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: 28px;
  }

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

@media (min-width: 1120px) {
  .page-faq .faq-title {
    font-size: clamp(2.6rem, 5vw, 4.2rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__link {
    transition: none;
  }

  .page-faq .faq-jump__link:hover,
  .page-faq .faq-jump__link:focus-visible {
    transform: none;
  }
}