.page-faq {
  --faq-ink-on-dark: #EAF6F1;
  --faq-open-bg: #0B2B26;
  --faq-teal-ink: #0F7A63;
  background: var(--c-bg);
  color: var(--c-text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--c-bg-deep);
  border-radius: 0 0 var(--r-lg) var(--r-lg);
  padding: clamp(1.75rem, 4vw, 2.75rem) 0 clamp(2.25rem, 5vw, 4rem);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 60%;
  opacity: .3;
  z-index: -2;
}

.page-faq .faq-hero__veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(200deg, rgba(6, 26, 23, .72) 0%, rgba(6, 26, 23, .94) 58%, rgba(11, 43, 38, .98) 100%),
    repeating-linear-gradient(118deg, rgba(36, 240, 200, .09) 0 1px, transparent 1px 68px);
}

.page-faq .faq-hero__inner {
  position: relative;
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.5rem;
  font-size: .8rem;
  letter-spacing: .05em;
  color: var(--c-text-dim);
}

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

.page-faq .crumbs a:hover {
  border-bottom-color: var(--c-accent-soft);
  color: var(--c-accent-soft);
}

.page-faq .faq-hero .eyebrow {
  display: block;
  color: var(--c-accent);
  margin: 0 0 .7rem;
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 6vw, 3.5rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--c-text);
}

.page-faq .faq-hero__lede {
  max-width: 62ch;
  margin: 1.25rem 0 0;
  font-size: clamp(.98rem, 1.3vw, 1.08rem);
  line-height: 1.85;
  color: var(--c-text-dim);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem 1.75rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
  font-size: .86rem;
  color: var(--c-text-dim);
}

.page-faq .faq-hero__stats .mono {
  margin-right: .3rem;
  font-weight: 700;
  color: var(--c-accent);
  font-size: 1.05rem;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.75rem;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
  padding-block: clamp(1.75rem, 4vw, 3rem) clamp(3rem, 6vw, 5rem);
}

/* ---------- 侧边目录 ---------- */
.page-faq .faq-toc__title {
  display: none;
  margin: 0 0 .75rem;
  color: var(--c-text-dim);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: .45rem;
  margin: 0;
  padding: 0 0 .5rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-faq .faq-toc .chapter-nav__link {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  padding: .5rem .9rem;
  border-radius: var(--r-pill);
  white-space: nowrap;
  font-size: .88rem;
  color: var(--c-text-dim);
  text-decoration: none;
  transition: color .16s ease, background-color .16s ease;
}

.page-faq .faq-toc .chapter-nav__link .mono {
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--c-accent);
}

.page-faq .faq-toc .chapter-nav__link:hover {
  color: var(--c-text);
  background: var(--c-surface-2);
}

.page-faq .faq-toc .chapter-nav__link[aria-current="true"] {
  background: var(--c-accent);
  color: var(--c-accent-ink);
}

.page-faq .faq-toc .chapter-nav__link[aria-current="true"] .mono {
  color: var(--c-accent-ink);
}

/* ---------- 章节 ---------- */
.page-faq .faq-content {
  display: grid;
  min-width: 0;
  gap: clamp(2.25rem, 5vw, 3.5rem);
}

.page-faq .chapter {
  margin: 0;
  scroll-margin-top: 140px;
}

.page-faq .chapter__head {
  margin-bottom: 1.4rem;
}

.page-faq .chapter__num {
  display: block;
  margin-bottom: .4rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .18em;
  color: var(--c-accent);
}

.page-faq .chapter__title {
  margin: 0 0 .65rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.2vw, 1.95rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.page-faq .chapter__lede {
  max-width: 60ch;
  margin: 0;
  font-size: .98rem;
  line-height: 1.85;
  color: var(--c-text-dim);
}

/* ---------- 01 三步路径 ---------- */
.page-faq .step-path {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-faq .step-path__item {
  position: relative;
  padding: 1.4rem 1.25rem 1.3rem;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: var(--c-surface);
}

.page-faq .step-path__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  height: 2.5rem;
  margin-bottom: .9rem;
  border-radius: var(--r-pill);
  background: var(--c-accent);
  color: var(--c-accent-ink);
  font-size: .95rem;
  font-weight: 700;
}

.page-faq .step-path__title {
  margin: 0 0 .55rem;
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.45;
}

.page-faq .step-path__item p {
  margin: 0 0 .7rem;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--c-text-dim);
}

.page-faq .step-path__out {
  margin: 0;
  padding-top: .7rem;
  border-top: 1px dashed var(--c-line);
  font-size: .88rem;
  color: var(--c-accent-soft);
}

.page-faq .step-path__out::before {
  content: "→ ";
  color: var(--c-action);
  font-weight: 700;
}

.page-faq .faq-figure {
  margin: 1.5rem 0 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-surface-2);
  overflow: hidden;
}

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

.page-faq .faq-figure figcaption {
  padding: .75rem 1rem;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--c-text-dim);
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-classes {
  margin-top: 1.5rem;
}

.page-faq .faq-classes .eyebrow {
  display: block;
  margin-bottom: .7rem;
  color: var(--c-accent);
}

.page-faq .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .chip--static {
  pointer-events: none;
  font-size: .82rem;
  color: var(--c-text);
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  padding: .35rem .8rem;
}

/* ---------- 02 / 04 卡片 ---------- */
.page-faq .faq-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-faq .faq-card {
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-surface);
}

.page-faq .faq-card--accent {
  border-left: 3px solid var(--c-action);
}

.page-faq .faq-card__k {
  margin: 0 0 .5rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.page-faq .faq-card h3 {
  margin: 0 0 .55rem;
  font-size: 1.02rem;
  line-height: 1.5;
}

.page-faq .faq-card p:last-child {
  margin: 0;
  font-size: .92rem;
  line-height: 1.82;
  color: var(--c-text-dim);
}

/* ---------- 03 时间轴 ---------- */
.page-faq .faq-timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.page-faq .faq-timeline > li {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1.1rem 0;
  border-top: 1px dashed var(--c-line);
}

.page-faq .faq-timeline > li:last-child {
  border-bottom: 1px dashed var(--c-line);
}

.page-faq .faq-timeline__t {
  padding-top: .15rem;
  font-size: .88rem;
  letter-spacing: .04em;
  color: var(--c-accent);
}

.page-faq .faq-timeline h3 {
  margin: 0 0 .4rem;
  font-size: 1rem;
  line-height: 1.5;
}

.page-faq .faq-timeline p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.82;
  color: var(--c-text-dim);
}

/* ---------- 04 反馈提示块 ---------- */
.page-faq .faq-callout {
  margin: 0 0 1.25rem;
  padding: 1.25rem 1.35rem;
  border-radius: var(--r-md);
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-action);
  background: linear-gradient(120deg, var(--c-surface) 0%, var(--c-surface-2) 100%);
}

.page-faq .faq-callout__label {
  margin: 0 0 .35rem;
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--c-action-soft);
}

.page-faq .faq-callout__mail {
  margin: 0 0 .55rem;
  font-size: clamp(1rem, 2.6vw, 1.3rem);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--c-text);
  word-break: break-all;
}

.page-faq .faq-callout__note {
  margin: 0;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--c-text-dim);
}

/* ---------- 05 设置清单 ---------- */
.page-faq .faq-settings {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-settings__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: .35rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-settings__k {
  font-size: .8rem;
  letter-spacing: .16em;
  color: var(--c-accent);
}

.page-faq .faq-settings__row p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.82;
  color: var(--c-text-dim);
}

/* ---------- 06 米白问答区 ---------- */
.page-faq .faq-qa {
  --c-text: #10251F;
  --c-text-dim: #4A6B62;
  --c-line: #C9D6CE;
  --c-surface: #FFFFFF;
  padding: clamp(1.25rem, 3.5vw, 2.5rem);
  border-radius: var(--r-lg);
  background: var(--c-paper);
  color: var(--c-paper-ink);
}

.page-faq .faq-qa .chapter__num {
  color: var(--faq-teal-ink);
}

.page-faq .faq-qa .chapter__lede {
  color: var(--c-text-dim);
}

.page-faq .qa-search {
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .7rem 1.1rem;
  border: 1.5px solid var(--c-line);
  border-radius: var(--r-pill);
  background: #FFFFFF;
  transition: border-color .18s ease, box-shadow .18s ease;
}

.page-faq .qa-search:focus-within {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 4px rgba(36, 240, 200, .22);
}

.page-faq .qa-search__icon {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  border: 1.6px solid var(--faq-teal-ink);
  border-radius: 50%;
  position: relative;
}

.page-faq .qa-search__icon::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -4px;
  width: 7px;
  height: 1.6px;
  background: var(--faq-teal-ink);
  transform: rotate(45deg);
}

.page-faq .qa-search input {
  flex: 1 1 auto;
  min-width: 0;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: .95rem;
  color: var(--c-paper-ink);
}

.page-faq .qa-search input::placeholder {
  color: #7B9990;
}

.page-faq .qa-search input:focus {
  outline: none;
}

.page-faq .qa-search__hint {
  flex: 0 0 auto;
  padding: .12rem .45rem;
  border: 1px solid var(--c-line);
  border-radius: .35rem;
  font-size: .76rem;
  color: #6E8C83;
}

.page-faq .qa-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin: 1rem 0 1.75rem;
}

.page-faq .faq-qa .chip {
  padding: .35rem .9rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-line);
  background: #FFFFFF;
  color: var(--c-paper-ink);
  font-size: .85rem;
  cursor: pointer;
  transition: background-color .16s ease, color .16s ease, border-color .16s ease;
}

.page-faq .faq-qa .chip[aria-pressed="true"] {
  background: var(--c-bg);
  border-color: var(--c-bg);
  color: var(--c-accent);
}

.page-faq .qa-group + .qa-group {
  margin-top: 1.75rem;
}

.page-faq .qa-group__title {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  margin: 0 0 .35rem;
  font-size: .92rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: #17423A;
}

.page-faq .qa-group__title .mono {
  font-size: .76rem;
  color: var(--faq-teal-ink);
}

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

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

.page-faq .qa-item > summary {
  display: flex;
  align-items: center;
  gap: .9rem;
  padding: .85rem 1rem;
  border-radius: var(--r-pill);
  font-size: .96rem;
  font-weight: 600;
  line-height: 1.55;
  cursor: pointer;
  list-style: none;
  transition: background-color .18s ease, color .18s ease;
}

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

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

.page-faq .qa-item > summary:hover {
  background: rgba(15, 122, 99, .09);
}

.page-faq .qa-item[open] > summary {
  background: var(--faq-open-bg);
  color: var(--faq-ink-on-dark);
}

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

.page-faq .qa-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  opacity: .65;
}

.page-faq .qa-item__mark::before,
.page-faq .qa-item__mark::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  top: 50%;
  height: 1.5px;
  background: currentColor;
  transform: translateY(-50%);
}

.page-faq .qa-item__mark::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform .2s ease;
}

.page-faq .qa-item[open] .qa-item__mark::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .qa-item__body {
  padding: .35rem 1rem 1.3rem calc(1rem + 2.1rem);
  font-size: .93rem;
  line-height: 1.85;
  color: var(--c-text-dim);
}

.page-faq .qa-item__body p {
  margin: 0 0 .6rem;
}

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

/* ---------- 收尾入口 ---------- */
.page-faq .faq-next {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, var(--c-surface) 0%, var(--c-surface-2) 100%);
}

.page-faq .faq-next__title {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  line-height: 1.35;
}

.page-faq .faq-next p {
  max-width: 62ch;
  margin: 0 0 1.1rem;
  font-size: .93rem;
  line-height: 1.85;
  color: var(--c-text-dim);
}

.page-faq .faq-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-settings__row {
    grid-template-columns: 5rem minmax(0, 1fr);
    gap: 1.25rem;
    align-items: start;
  }
}

@media (min-width: 720px) {
  .page-faq .step-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .page-faq .step-path__item:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 2.65rem;
    right: -1.25rem;
    width: 1.25rem;
    border-top: 2px dashed var(--c-accent);
    opacity: .55;
  }

  .page-faq .faq-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 132px;
    align-self: start;
    padding-left: 1.1rem;
    border-left: 2px solid var(--c-line);
  }

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

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: .1rem;
    padding-bottom: 0;
    overflow: visible;
  }

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

  .page-faq .faq-toc .chapter-nav__link {
    white-space: normal;
    border-radius: 0 var(--r-pill) var(--r-pill) 0;
  }
}

@media (max-width: 560px) {
  .page-faq .qa-item__body {
    padding-inline: 1rem;
  }

  .page-faq .faq-timeline > li {
    grid-template-columns: 3.5rem minmax(0, 1fr);
    gap: .75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }
}