.page-faq {
  --faq-sticky: 132px;
  display: block;
  color: var(--ink);
  font-family: var(--font-body);
}

.page-faq .arena-link {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(28px, 5vw, 64px) 0 clamp(26px, 4vw, 52px);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, var(--scan) 1px, transparent 1px),
    linear-gradient(to bottom, var(--scan) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: radial-gradient(120% 95% at 10% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(120% 95% at 10% 0%, #000 0%, transparent 72%);
  opacity: 0.5;
  pointer-events: none;
}

.page-faq .faq-hero__tick {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 clamp(16px, 3vw, 28px);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.page-faq .faq-hero__tick span:first-child {
  color: var(--amber);
}

.page-faq .faq-hero__tick::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--line), transparent);
}

.page-faq .faq-hero__title {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(34px, 7vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.005em;
  color: var(--ink);
}

.page-faq .faq-hero__lede {
  max-width: 64ch;
  margin: 0 0 clamp(22px, 3.4vw, 40px);
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.85;
  color: var(--ink-muted);
}

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

.page-faq .faq-hero__quick a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--bg-panel);
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  transition: border-color var(--t) ease, transform var(--t) ease, background var(--t) ease;
}

.page-faq .faq-hero__quick a:hover,
.page-faq .faq-hero__quick a:focus-visible {
  border-color: var(--cyan);
  background: var(--bg-panel-2);
  transform: translateY(-2px);
}

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

.page-faq .faq-num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-faq .faq-hero__quick-t {
  letter-spacing: 0.02em;
}

@media (min-width: 640px) {
  .page-faq .faq-hero__quick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__quick {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    max-width: 900px;
  }
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-body {
  padding: clamp(30px, 5vw, 64px) 0 clamp(48px, 7vw, 96px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

@media (min-width: 1000px) {
  .page-faq .faq-body__grid {
    grid-template-columns: minmax(200px, 250px) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 74px);
  }
}

/* ---------- 左侧问题索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: var(--bg-panel);
  padding: 18px 16px 16px;
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px 9px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color var(--t) ease, border-color var(--t) ease, background var(--t) ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--ink);
  border-left-color: var(--cyan);
  background: rgba(38, 247, 208, 0.07);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 1px;
}

.page-faq .faq-index__link[data-active] {
  color: var(--ink);
  border-left-color: var(--amber);
  background: rgba(255, 194, 75, 0.08);
}

.page-faq .faq-index__num {
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-index__link[data-active] .faq-index__num {
  color: var(--amber);
}

.page-faq .faq-index__foot {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line-soft);
}

.page-faq .faq-index__foot-t {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
}

.page-faq .faq-index__mail {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-faq .faq-index__foot-n {
  margin: 0;
  font-size: 12px;
  color: var(--ink-muted);
}

@media (min-width: 1000px) {
  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
  }
}

/* ---------- 问题流 ---------- */
.page-faq .faq-stream {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  min-width: 0;
}

.page-faq .faq-block {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3.2vw, 34px);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: var(--bg-panel);
  scroll-margin-top: var(--faq-sticky);
  min-width: 0;
}

.page-faq .faq-block::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(38, 247, 208, 0.045) 0 1px,
    transparent 1px 5px
  );
  pointer-events: none;
}

.page-faq .faq-block > * {
  position: relative;
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 0 14px;
  margin-bottom: clamp(16px, 2.4vw, 24px);
  padding-bottom: clamp(12px, 2vw, 18px);
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .faq-block__num {
  font-family: var(--font-num);
  font-size: clamp(19px, 2.3vw, 26px);
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.04em;
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.15;
  color: var(--ink);
}

.page-faq .faq-block__sub {
  grid-column: 1 / -1;
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-muted);
}

/* ---------- 步骤条 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--bg-panel-2);
  transition: border-color var(--t) ease, transform var(--t) ease;
}

.page-faq .faq-steps__item:hover {
  border-color: var(--teal);
  transform: translateX(2px);
}

.page-faq .faq-steps__idx {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .faq-steps__t {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

.page-faq .faq-steps__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-qa {
  display: grid;
  gap: 10px;
  min-width: 0;
}

.page-faq .faq-qa__item {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--bg-panel-2);
  transition: border-color var(--t) ease, box-shadow var(--t) ease;
}

.page-faq .faq-qa__item:hover {
  border-color: var(--teal);
}

.page-faq .faq-qa__item[open] {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px rgba(38, 247, 208, 0.2);
}

.page-faq .faq-qa__item > summary {
  position: relative;
  display: block;
  cursor: pointer;
  list-style: none;
  padding: 14px 44px 14px 16px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink);
  transition: color var(--t) ease;
}

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

.page-faq .faq-qa__item > summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 12px;
  font-family: var(--font-num);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: color var(--t) ease;
}

.page-faq .faq-qa__item[open] > summary::after {
  content: "−";
  color: var(--amber);
}

.page-faq .faq-qa__item > summary:hover {
  color: var(--cyan);
}

.page-faq .faq-qa__item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: var(--r-md);
}

.page-faq .faq-qa__body {
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-muted);
  overflow-wrap: anywhere;
}

.page-faq .faq-qa__body p {
  margin: 0 0 10px;
}

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

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
}

.page-faq .faq-figure .arena-figure__frame {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--bg-deep);
}

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

.page-faq .faq-figure .arena-figure__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ink-muted);
}

/* ---------- 数据条 ---------- */
.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-bottom: clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-metrics__item {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 8px;
  padding: 16px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--amber);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--bg-panel-2);
}

.page-faq .faq-metrics__v {
  font-family: var(--font-num);
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-faq .faq-metrics__u {
  font-size: 13px;
  color: var(--ink-muted);
}

.page-faq .faq-metrics__l {
  grid-column: 1 / -1;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-muted);
}

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

/* ---------- 桌面端 / 移动端对照 ---------- */
.page-faq .faq-compare {
  list-style: none;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-compare li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 14px 16px;
  border-left: 2px solid var(--teal);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(14, 143, 122, 0.09);
}

.page-faq .faq-compare__k {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-compare__v {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-muted);
}

@media (min-width: 640px) {
  .page-faq .faq-compare li {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 14px;
    align-items: baseline;
  }
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 12px;
  padding: clamp(16px, 2.4vw, 22px);
  margin-bottom: clamp(16px, 2.4vw, 24px);
  border: 1px solid rgba(255, 194, 75, 0.4);
  border-radius: var(--r-md);
  background: rgba(255, 194, 75, 0.06);
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(255, 194, 75, 0.22);
}

.page-faq .faq-contact__row:last-of-type {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-contact__label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
}

.page-faq .faq-contact__value {
  font-family: var(--font-num);
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.5;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-muted);
}

@media (min-width: 640px) {
  .page-faq .faq-contact__row {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

/* ---------- 底部延伸 ---------- */
.page-faq .faq-outro {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(120deg, rgba(27, 42, 91, 0.45), rgba(13, 35, 30, 0.6));
}

.page-faq .faq-outro__t {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .faq-outro__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-outro__list li {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-muted);
}

@media (min-width: 720px) {
  .page-faq .faq-outro__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}