.page-faq {
  --faq-panel-gap: clamp(1.4rem, 3vw, 2.6rem);
  --faq-num-bg: rgba(58, 143, 224, 0.16);
  --faq-num-bg-yellow: rgba(239, 182, 60, 0.18);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-bottom: 0;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--gap);
  grid-template-columns: 1fr;
  margin-top: clamp(1.2rem, 3vw, 2.4rem);
}

.page-faq .faq-hero__lede h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 6.4vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 1.1rem;
  max-width: 22ch;
}

.page-faq .faq-hero__lede .yt-lede {
  max-width: 46ch;
  color: var(--text-2);
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.4rem;
}

.page-faq .faq-hero__quick .yt-btn {
  font-size: 0.875rem;
}

.page-faq .faq-hero__meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.6rem;
  align-content: start;
}

.page-faq .faq-hero__stat {
  padding: 0.9rem 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  border-top: 2px solid var(--flag-blue);
}

.page-faq .faq-hero__bignum {
  font-size: clamp(1.6rem, 4.4vw, 2.2rem);
  line-height: 1;
  color: var(--text-1);
  margin: 0.2rem 0 0;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.page-faq .faq-hero__bignum span {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--text-2);
  letter-spacing: 0.04em;
}

.page-faq .faq-hero__statline {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-2);
  line-height: 1.5;
}

.page-faq .faq-hero__figure {
  margin-top: clamp(1.6rem, 4vw, 2.8rem);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-panel-gap);
}

.page-faq .faq-aside__sticky {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-faq .faq-filter {
  list-style: none;
  margin: 0.4rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.page-faq .faq-filter__btn {
  appearance: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--text-2);
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.42rem 0.75rem;
  transition: background 150ms var(--ease), color 150ms var(--ease), border-color 150ms var(--ease);
}

.page-faq .faq-filter__btn:hover {
  color: var(--text-1);
  border-color: var(--line-strong);
}

.page-faq .faq-filter__btn.is-active {
  color: var(--ink-900);
  background: var(--flag-white);
  border-color: var(--flag-white);
  font-weight: 600;
}

.page-faq .faq-filter__btn:focus-visible {
  outline: 2px solid var(--flag-blue);
  outline-offset: 2px;
}

.page-faq .faq-aside__hint {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

/* ---------- 步骤列表 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-faq .faq-steps > li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem;
  align-items: start;
}

.page-faq .faq-steps__dot {
  font-family: var(--font-data);
  font-size: 0.75rem;
  line-height: 1;
  color: var(--flag-blue);
  background: var(--faq-num-bg);
  border: 1px solid rgba(58, 143, 224, 0.4);
  border-radius: var(--radius);
  padding: 0.45rem 0.4rem;
  min-width: 2.1rem;
  text-align: center;
  letter-spacing: 0.04em;
}

.page-faq .faq-steps h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  font-family: var(--font-heading);
  letter-spacing: 0.01em;
}

.page-faq .faq-steps p {
  margin: 0;
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-faq .faq-steps--mini {
  gap: 0.6rem;
  margin-top: 0.6rem;
}

.page-faq .faq-steps--mini > li {
  grid-template-columns: 1fr;
  gap: 0;
  padding-left: 0.9rem;
  position: relative;
  font-size: 0.8125rem;
  color: var(--text-2);
}

.page-faq .faq-steps--mini > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--flag-blue);
}

/* ---------- 问题块 ---------- */
.page-faq .faq-panel {
  animation: faq-fade 150ms var(--ease);
}

.page-faq .faq-panel--hidden {
  display: none;
}

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

.page-faq .faq-block + .faq-block {
  margin-top: clamp(2rem, 5vw, 3.4rem);
  padding-top: clamp(1.6rem, 4vw, 2.4rem);
  border-top: 1px solid var(--line);
}

.page-faq .faq-block__head {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-start;
}

.page-faq .faq-block__head h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(1.35rem, 3.4vw, 1.85rem);
  line-height: 1.24;
  letter-spacing: -0.005em;
}

.page-faq .faq-block__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin-top: 0.4rem;
}

.page-faq .faq-block__col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-faq .faq-block__figure {
  margin: 0.4rem 0 0;
}

/* ---------- 兼容卡片 ---------- */
.page-faq .faq-compat {
  margin-top: 1.2rem;
}

.page-faq .faq-compat .yt-card h3 {
  margin: 0.5rem 0 0.35rem;
  font-size: 1rem;
  font-family: var(--font-heading);
}

.page-faq .faq-compat .yt-card p {
  margin: 0;
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ---------- 订阅自查卡 ---------- */
.page-faq .faq-sub-card {
  padding: 1.1rem 1.1rem 1.2rem;
}

.page-faq .faq-sub-card__foot {
  margin: 0.9rem 0 0;
  font-size: 0.8125rem;
  color: var(--ink-800);
  line-height: 1.6;
}

.page-faq .faq-sub-card__foot a {
  color: var(--ink-900);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-check {
  list-style: none;
  margin: 0.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
  font-size: 0.875rem;
}

.page-faq .faq-check--loose {
  gap: 0.7rem;
  margin-top: 1rem;
}

.page-faq .faq-check li {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  line-height: 1.6;
}

.page-faq .faq-check .yt-num {
  color: var(--flag-blue);
  font-size: 1rem;
  min-width: 1.6rem;
  text-align: right;
}

.page-faq .faq-sub-card .yt-num {
  color: var(--ink-900);
}

.page-faq .faq-sub-card .faq-check li {
  color: var(--ink-800);
  justify-content: flex-start;
}

/* ---------- 数据核对 ---------- */
.page-faq .faq-data {
  margin-top: 1.2rem;
}

.page-faq .faq-data .yt-card {
  padding: 1rem 1rem 1.1rem;
}

.page-faq .faq-data h3 {
  margin: 0.55rem 0 0.35rem;
  font-size: 1rem;
  font-family: var(--font-heading);
}

.page-faq .faq-data p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-2);
}

/* ---------- 联系区 ---------- */
.page-faq .faq-contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin-top: 1.2rem;
}

.page-faq .faq-contact .yt-card {
  padding: 1.1rem;
}

.page-faq .faq-contact__mail {
  font-size: clamp(1rem, 3.6vw, 1.375rem);
  margin: 0.5rem 0 0.6rem;
  color: var(--text-1);
  word-break: break-all;
}

.page-faq .faq-contact__desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-2);
}

.page-faq .faq-contact .faq-check {
  color: var(--text-2);
}

.page-faq .faq-contact .faq-check li {
  padding-left: 0.9rem;
  position: relative;
  display: block;
}

.page-faq .faq-contact .faq-check li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--flag-green);
}

.page-faq .faq-copy {
  appearance: none;
  cursor: pointer;
  margin-top: 1rem;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--text-1);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 0.5rem 0.9rem;
  transition: background 150ms var(--ease), border-color 150ms var(--ease);
}

.page-faq .faq-copy:hover {
  background: var(--glass-strong);
  border-color: var(--flag-blue);
}

.page-faq .faq-copy:focus-visible {
  outline: 2px solid var(--flag-blue);
  outline-offset: 2px;
}

.page-faq .faq-contact .yt-btn {
  margin-top: 1rem;
  font-size: 0.875rem;
}

/* ---------- 尾部链接 ---------- */
.page-faq .faq-links {
  margin-top: 1.2rem;
}

.page-faq .faq-links__item {
  display: block;
  text-decoration: none;
  color: inherit;
}

.page-faq .faq-links__item h3 {
  margin: 0.5rem 0 0.35rem;
  font-size: 1.05rem;
  font-family: var(--font-heading);
}

.page-faq .faq-links__item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--text-2);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.35fr 1fr;
    align-items: start;
  }

  .page-faq .faq-block__grid {
    grid-template-columns: 1.3fr 1fr;
    align-items: start;
  }

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

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-aside__sticky {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-faq .faq-filter {
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .faq-filter__btn {
    text-align: left;
    width: 100%;
  }

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

@media (max-width: 719px) {
  .page-faq .faq-hero__meta {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-hero__quick .yt-btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

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

  .page-faq .faq-filter__btn,
  .page-faq .faq-copy {
    transition: none;
  }
}