.page-faq {
  --faq-gap: clamp(14px, 2vw, 26px);
  --faq-pad: clamp(52px, 8vw, 96px);
  --faq-hair: rgba(127, 201, 194, 0.28);
  --faq-hair-dark: rgba(8, 17, 15, 0.14);
  background: var(--deep);
  color: var(--sand);
  overflow-x: clip;
}

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

.page-faq .crumb {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-faq .crumb__sep {
  margin: 0 8px;
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(40px, 7vw, 88px)) 0 clamp(48px, 7vw, 84px);
  background: var(--deep);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 76px 76px;
  opacity: 0.06;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  top: -12%;
  width: 62vw;
  height: 62vw;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 106, 61, 0.2), transparent 66%);
  pointer-events: none;
}

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: var(--fs-display);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 14em;
}

.page-faq .faq-hero .lede {
  margin-top: 18px;
  max-width: var(--measure);
  font-size: var(--fs-body);
  line-height: 1.85;
  color: rgba(246, 240, 228, 0.84);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-signal {
  border: 1px solid var(--faq-hair);
  border-top: 2px solid var(--lime);
  background: rgba(11, 90, 95, 0.34);
  padding: clamp(20px, 3vw, 28px);
}

.page-faq .faq-signal__head {
  margin: 0 0 16px;
  font-size: var(--fs-note);
  letter-spacing: 0.06em;
  color: var(--shoal);
}

.page-faq .faq-signal__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-signal__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-signal__k {
  font-size: var(--fs-sm);
  color: rgba(246, 240, 228, 0.78);
}

.page-faq .faq-signal__v {
  font-size: var(--fs-sm);
  color: var(--lime);
  white-space: nowrap;
}

.page-faq .faq-signal__foot {
  margin: 18px 0 0;
  font-size: var(--fs-note);
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 通用分区 ---------- */
.page-faq .faq-sec {
  position: relative;
  padding: var(--faq-pad) 0;
}

.page-faq .faq-sec--deep {
  background: var(--deep);
  color: var(--sand);
}

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

.page-faq .faq-sec--tide {
  background: var(--tide);
  color: var(--sand);
  overflow: hidden;
}

.page-faq .faq-sec--tide::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(180deg, rgba(127, 201, 194, 0.16) 0 1px, transparent 1px 24px),
    radial-gradient(120% 60% at 50% 118%, rgba(184, 255, 60, 0.12), transparent 62%);
  pointer-events: none;
}

.page-faq .faq-sec--tide .shell {
  position: relative;
  z-index: 1;
}

.page-faq .section-head .lede {
  margin-top: 16px;
  max-width: var(--measure);
  line-height: 1.85;
  color: rgba(246, 240, 228, 0.8);
}

.page-faq .faq-sec--sand .section-title {
  color: var(--ink);
}

.page-faq .faq-group__head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 42px);
}

.page-faq .faq-group__intro {
  margin: 16px 0 0;
  max-width: var(--measure);
  font-size: var(--fs-body);
  line-height: 1.85;
}

.page-faq .faq-sec--sand .faq-group__intro {
  color: rgba(8, 17, 15, 0.76);
}

.page-faq .faq-sec--deep .faq-group__intro,
.page-faq .faq-sec--tide .faq-group__intro {
  color: rgba(246, 240, 228, 0.8);
}

/* ---------- 四象限索引 ---------- */
.page-faq .faq-index__art {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-faq .faq-index__art img {
  width: 100%;
  object-fit: cover;
  filter: saturate(1.05);
}

.page-faq .faq-quad {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-quad__cell {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "no icon"
    "name name"
    "desc desc";
  gap: 10px 14px;
  padding: clamp(20px, 2.6vw, 28px);
  border: 1px solid var(--faq-hair);
  background: rgba(11, 90, 95, 0.18);
  color: inherit;
  text-decoration: none;
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-faq .faq-quad__cell:hover,
.page-faq .faq-quad__cell:focus-visible {
  border-color: var(--coral);
  background: rgba(11, 90, 95, 0.44);
  outline: 2px solid rgba(255, 106, 61, 0.36);
  outline-offset: 2px;
}

.page-faq .faq-quad__no {
  grid-area: no;
  font-size: var(--fs-note);
  color: var(--lime);
  letter-spacing: 0.08em;
}

.page-faq .faq-quad__icon {
  grid-area: icon;
  justify-self: end;
  color: var(--coral);
  line-height: 0;
}

.page-faq .faq-quad__name {
  grid-area: name;
  font-size: var(--fs-h4);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-faq .faq-quad__desc {
  grid-area: desc;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: rgba(246, 240, 228, 0.74);
}

/* ---------- 折叠面板 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--faq-hair-dark);
}

.page-faq .faq-list--deep {
  border-top-color: var(--faq-hair);
}

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

.page-faq .faq-list--deep .faq-item,
.page-faq .faq-sec--tide .faq-item {
  border-bottom-color: var(--faq-hair);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 14px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 4px;
}

.page-faq .faq-item__no {
  font-size: var(--fs-note);
  padding-top: 4px;
  color: var(--mist);
  letter-spacing: 0.06em;
}

.page-faq .faq-item[open] .faq-item__no {
  color: var(--coral);
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: var(--fs-h4);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

.page-faq .faq-item__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 8px;
  color: var(--coral);
  flex: none;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.page-faq .faq-item__mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
  transition: transform 0.22s var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-item__body {
  padding: 0 0 24px 34px;
  animation: faq-fade 0.22s var(--ease) both;
}

.page-faq .faq-item__body > p {
  margin: 0 0 14px;
  max-width: var(--measure);
  font-size: var(--fs-sm);
  line-height: 1.85;
}

.page-faq .faq-sec--sand .faq-item__body > p {
  color: rgba(8, 17, 15, 0.78);
}

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

.page-faq .faq-item__more {
  margin-top: 6px;
}

.page-faq .faq-link {
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  font-size: var(--fs-sm);
}

.page-faq .faq-sec--deep .faq-link,
.page-faq .faq-sec--tide .faq-link {
  color: var(--lime);
}

.page-faq .faq-steps {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--faq-hair-dark);
}

.page-faq .faq-sec--tide .faq-steps {
  border-left-color: var(--faq-hair);
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0 10px 16px;
}

.page-faq .faq-steps li + li {
  border-top: 1px dashed var(--faq-hair-dark);
}

.page-faq .faq-sec--tide .faq-steps li + li {
  border-top-color: rgba(127, 201, 194, 0.22);
}

.page-faq .faq-steps__no {
  font-size: var(--fs-note);
  color: var(--coral);
  padding-top: 2px;
}

.page-faq .faq-steps p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
}

.page-faq .faq-sec--sand .faq-steps p {
  color: rgba(8, 17, 15, 0.78);
}

/* ---------- 访问分组 ---------- */
.page-faq .faq-access__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

.page-faq .faq-access__art img {
  width: 100%;
  object-fit: cover;
}

.page-faq .faq-note {
  margin-top: var(--faq-gap);
  border: 1px solid var(--faq-hair);
  border-left: 3px solid var(--lime);
  background: rgba(5, 48, 58, 0.42);
  padding: 20px clamp(18px, 2.4vw, 24px);
}

.page-faq .faq-note__label {
  margin: 0 0 8px;
  font-size: var(--fs-note);
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-faq .faq-note__text {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(246, 240, 228, 0.84);
}

/* ---------- 下载四步 ---------- */
.page-faq .faq-flow {
  margin: 0 0 clamp(24px, 3.6vw, 40px);
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--faq-hair-dark);
  border: 1px solid var(--faq-hair-dark);
}

.page-faq .faq-flow__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "no name"
    "tip tip";
  gap: 8px 12px;
  background: var(--sand);
  padding: 18px clamp(16px, 2.2vw, 22px);
}

.page-faq .faq-flow__no {
  grid-area: no;
  font-size: var(--fs-note);
  color: var(--coral);
  letter-spacing: 0.08em;
}

.page-faq .faq-flow__name {
  grid-area: name;
  font-size: var(--fs-h4);
  font-weight: 800;
}

.page-faq .faq-flow__tip {
  grid-area: tip;
  font-size: var(--fs-note);
  line-height: 1.7;
  color: rgba(8, 17, 15, 0.66);
}

.page-faq .faq-path {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: clamp(26px, 4vw, 42px);
  padding: 14px clamp(16px, 2.4vw, 22px);
  border: 1px dashed rgba(11, 90, 95, 0.4);
  background: rgba(127, 201, 194, 0.16);
}

.page-faq .faq-path__label {
  font-size: var(--fs-note);
  color: rgba(8, 17, 15, 0.66);
}

.page-faq .faq-path__code {
  font-size: var(--fs-sm);
  padding: 3px 8px;
  background: var(--deep);
  color: var(--lime);
  letter-spacing: 0.02em;
}

/* ---------- 版本时间轴 ---------- */
.page-faq .faq-track {
  margin: 0 0 clamp(28px, 4vw, 46px);
  padding: 0 0 0 26px;
  list-style: none;
  border-left: 1px solid var(--faq-hair);
}

.page-faq .faq-track__node {
  position: relative;
  padding: 0 0 30px;
}

.page-faq .faq-track__node:last-child {
  padding-bottom: 0;
}

.page-faq .faq-track__node::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 5px;
  width: 11px;
  height: 11px;
  background: var(--deep);
  border: 1px solid var(--shoal);
}

.page-faq .faq-track__node--key::before {
  background: var(--coral);
  border-color: var(--coral);
  box-shadow: 0 0 0 4px rgba(255, 106, 61, 0.22);
}

.page-faq .faq-track__tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 8px;
  font-size: var(--fs-note);
  letter-spacing: 0.04em;
  color: var(--deep);
  background: var(--lime);
}

.page-faq .faq-track__title {
  margin: 0 0 6px;
  font-size: var(--fs-h3);
  font-weight: 900;
  letter-spacing: -0.01em;
}

.page-faq .faq-track__text {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(246, 240, 228, 0.78);
}

/* ---------- 收束区 ---------- */
.page-faq .faq-close__panel {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--faq-hair-dark);
  background: rgba(255, 255, 255, 0.5);
}

.page-faq .faq-close__text p {
  margin: 16px 0 0;
  max-width: var(--measure);
  font-size: var(--fs-body);
  line-height: 1.85;
  color: rgba(8, 17, 15, 0.78);
}

.page-faq .faq-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
}

/* ---------- 动效 ---------- */
@keyframes faq-rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes faq-fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.page-faq .faq-hero [data-reveal] {
  animation: faq-rise 0.55s var(--ease) both;
}

.page-faq .faq-hero__lead > [data-reveal]:nth-child(2) {
  animation-delay: 0.12s;
}

.page-faq .faq-hero__lead > [data-reveal]:nth-child(3) {
  animation-delay: 0.2s;
}

.page-faq .faq-hero__lead > [data-reveal]:nth-child(4) {
  animation-delay: 0.28s;
}

.page-faq .faq-signal[data-reveal] {
  animation-delay: 0.36s;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-quad {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding-bottom: 34px;
  }

  .page-faq .faq-quad__cell:nth-child(even) {
    margin-top: clamp(18px, 3vw, 38px);
  }

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

  .page-faq .faq-close__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-faq .faq-close__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.78fr);
    align-items: end;
  }

  .page-faq .faq-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-flow__item {
    grid-template-areas:
      "no"
      "name"
      "tip";
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-flow__item:nth-child(2) {
    padding-top: 34px;
  }

  .page-faq .faq-flow__item:nth-child(4) {
    padding-top: 34px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-access__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-faq .faq-access__side {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero [data-reveal],
  .page-faq .faq-item__body {
    animation: none;
  }

  .page-faq .faq-item__mark::after {
    transition: none;
  }
}