.page-faq {
  --faq-coral-lift: #FF8B70;
  background-color: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.75;
}

.page-faq .faq-shell {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  padding-block: clamp(18px, 2.4vw, 30px) clamp(52px, 7vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  margin: 0 0 clamp(14px, 2vw, 22px);
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-index);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--ink-55);
}

.page-faq .breadcrumb__item a {
  color: var(--teal);
  text-decoration: none;
}

.page-faq .breadcrumb__item a:hover,
.page-faq .breadcrumb__item a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .breadcrumb__sep {
  color: var(--grid);
}

.page-faq .breadcrumb__current {
  color: var(--ink-86);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-radius: var(--radius);
  padding: clamp(26px, 4.6vw, 60px) clamp(20px, 4vw, 52px) clamp(24px, 3.6vw, 46px);
  background: linear-gradient(126deg, var(--ink) 0%, var(--sea) 60%, #0A5070 100%);
  color: var(--cream);
  box-shadow: 0 22px 50px -32px rgba(6, 28, 46, .78);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(23, 215, 208, .16) 0 1px, transparent 1px 62px),
    repeating-linear-gradient(0deg, rgba(246, 241, 230, .05) 0 1px, transparent 1px 62px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -90px;
  top: -110px;
  width: 340px;
  height: 340px;
  z-index: 0;
  pointer-events: none;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(23, 215, 208, .3), transparent 68%);
}

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

.page-faq .faq-hero__kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--font-index);
  font-size: var(--fs-12);
  letter-spacing: .16em;
  text-transform: uppercase;
}

.page-faq .faq-hero__kicker-label {
  padding: 3px 10px;
  border: 1px solid rgba(23, 215, 208, .55);
  border-radius: 2px;
  color: var(--cyan);
}

.page-faq .faq-hero__kicker-num {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--on-dark-dim);
}

.page-faq .faq-hero__title {
  margin: 0 0 clamp(14px, 1.8vw, 22px);
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.2vw, 64px);
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--cream);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 44em;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.78;
  color: var(--on-dark);
}

/* ---------- 图片容器 ---------- */
.page-faq .faq-shot {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  overflow: hidden;
}

.page-faq .faq-shot--inline {
  margin-top: clamp(20px, 3vw, 32px);
}

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

.page-faq .faq-shot__cap {
  padding: 9px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-index);
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--ink-55);
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(26px, 3.4vw, 44px);
  margin-top: clamp(30px, 4.6vw, 58px);
}

.page-faq .faq-stream {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  scroll-margin-top: 96px;
}

.page-faq .faq-sec + .faq-sec {
  margin-top: clamp(34px, 5vw, 62px);
}

.page-faq .faq-sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px 14px;
  align-items: start;
  margin-bottom: clamp(14px, 1.8vw, 20px);
  padding-bottom: clamp(12px, 1.6vw, 18px);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-sec__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-20);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--coral);
}

.page-faq .faq-sec__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.16;
  color: var(--ink);
}

.page-faq .faq-sec__lead {
  margin: 0;
  max-width: 42em;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--ink-70);
}

.page-faq .faq-sec:target .faq-sec__num {
  color: var(--cyan);
}

/* ---------- 问答卡片 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  border: 1px solid var(--line);
  border-left: 3px solid var(--grid);
  border-radius: var(--radius);
  background: var(--paper);
  overflow: hidden;
  transition: border-left-color 220ms var(--ease), background-color 220ms var(--ease);
}

.page-faq .qa:not([open]):hover {
  border-left-color: var(--cyan);
}

.page-faq .qa[open] {
  border-left-color: var(--coral);
  background: var(--cream);
}

.page-faq .qa__sum {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: clamp(12px, 1.6vw, 16px) clamp(14px, 1.8vw, 18px);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
}

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

.page-faq .qa__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__num {
  flex: 0 0 auto;
  min-width: 3.4em;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--teal);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
  font-size: var(--fs-16);
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .qa__tag {
  flex: 0 0 auto;
  align-self: center;
}

.page-faq .qa__sum::after {
  content: "＋";
  flex: 0 0 auto;
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  line-height: 1.4;
  color: var(--ink-55);
  transition: transform 220ms var(--ease), color 220ms var(--ease);
}

.page-faq .qa[open] .qa__sum {
  padding-bottom: 10px;
}

.page-faq .qa[open] .qa__sum::after {
  transform: rotate(45deg);
  color: var(--coral);
}

.page-faq .qa__body {
  padding: 12px clamp(14px, 1.8vw, 18px) clamp(14px, 1.8vw, 18px);
  border-top: 1px dashed var(--line-strong);
}

.page-faq .qa__body p {
  margin: 0;
  max-width: 40em;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink-70);
}

.page-faq .qa__body p + p {
  margin-top: 12px;
}

.page-faq .qa__body a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__body a:hover,
.page-faq .qa__body a:focus-visible {
  color: var(--coral);
}

.page-faq .qa__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
  display: grid;
  gap: 7px;
}

.page-faq .qa__steps li {
  display: flex;
  gap: 10px;
  max-width: 40em;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--ink-70);
}

.page-faq .qa__steps li::before {
  counter-increment: faq-step;
  content: counter(faq-step, decimal-leading-zero);
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-12);
  color: var(--coral);
}

.page-faq .qa__body .copy-btn {
  margin-top: 2px;
}

/* ---------- 章节索引 ---------- */
.page-faq .faq-index {
  order: -1;
  min-width: 0;
}

.page-faq .faq-index__card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  padding: 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-index);
  font-size: var(--fs-12);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-55);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: var(--cream);
  color: var(--ink-86);
  font-size: var(--fs-12);
  line-height: 1.2;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--teal);
}

.page-faq .faq-index__more {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
  font-size: var(--fs-12);
}

.page-faq .faq-index__more a {
  color: var(--teal);
  font-family: var(--font-index);
  letter-spacing: .04em;
  text-decoration: none;
}

.page-faq .faq-index__more a:hover,
.page-faq .faq-index__more a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 结尾引导 ---------- */
.page-faq .faq-outro {
  display: grid;
  gap: 18px;
  margin-top: clamp(40px, 6vw, 76px);
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(120deg, var(--paper) 0%, var(--mist) 100%);
}

.page-faq .faq-outro__text {
  margin: 0;
  max-width: 40em;
  font-size: var(--fs-16);
  line-height: 1.72;
  color: var(--ink-86);
}

.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .btn--primary,
.page-faq .btn--ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  border-radius: 2px;
  font-family: var(--font-index);
  font-size: var(--fs-14);
  font-weight: 500;
  letter-spacing: .04em;
  text-decoration: none;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .btn--primary {
  border: 1px solid transparent;
  background: var(--coral);
  color: var(--ink);
}

.page-faq .btn--primary:hover,
.page-faq .btn--primary:focus-visible {
  background: var(--faq-coral-lift);
}

.page-faq .btn--ghost {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-86);
}

.page-faq .btn--ghost:hover,
.page-faq .btn--ghost:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 679px) {
  .page-faq .qa__tag {
    display: none;
  }

  .page-faq .qa__num {
    min-width: 3em;
  }

  .page-faq .faq-hero__title {
    max-width: none;
  }
}

/* ---------- 桌面端布局 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 244px;
    align-items: start;
  }

  .page-faq .faq-index {
    order: 0;
    position: sticky;
    top: 92px;
  }

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

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-index__list li {
    flex: 1 1 auto;
  }

  .page-faq .faq-index__link {
    display: flex;
    width: 100%;
    justify-content: flex-start;
    padding: 9px 2px 9px 10px;
    border: 0;
    border-left: 2px solid transparent;
    border-bottom: 1px dashed var(--line);
    border-radius: 0;
    background: transparent;
    white-space: normal;
    line-height: 1.5;
  }

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

  .page-faq .faq-index__link:hover .faq-index__num,
  .page-faq .faq-index__link:focus-visible .faq-index__num {
    color: var(--coral);
  }

  .page-faq .faq-index__more {
    flex-direction: column;
    gap: 8px;
  }

  .page-faq .faq-outro {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__sum::after,
  .page-faq .faq-index__link,
  .page-faq .btn--primary,
  .page-faq .btn--ghost {
    transition: none;
  }

  .page-faq .qa[open] .qa__sum::after {
    transform: none;
  }
}