.page-faq {
  --faq-gap: clamp(20px, 4vw, 44px);
  --faq-rule: rgba(8, 52, 79, .12);
  --faq-deep-rule: rgba(191, 239, 232, .22);
  --faq-rail: 230px;
}

.page-faq .breadcrumb {
  padding: 18px 0 4px;
}

.page-faq h2 {
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  line-height: 1.24;
  letter-spacing: -.01em;
  margin: .32em 0 .55em;
}

.page-faq .lede {
  max-width: 42em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(34px, 6vw, 72px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -10% -30% auto auto;
  width: min(560px, 70vw);
  height: min(560px, 70vw);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(35, 227, 198, .18), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-hero__lead h1 {
  font-size: clamp(1.8rem, 6vw, 3.2rem);
  line-height: 1.14;
  letter-spacing: -.015em;
  margin: .3em 0 .55em;
  max-width: 18em;
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__readout {
  position: relative;
  padding: 24px 22px 26px;
  border-radius: var(--radius);
  background: linear-gradient(158deg, var(--deep) 0%, #0b4667 58%, var(--water) 100%);
  color: var(--paper);
  overflow: hidden;
  box-shadow: 0 18px 40px -26px rgba(8, 52, 79, .8);
}

.page-faq .faq-hero__readout::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -52%;
  width: 230px;
  height: 230px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(35, 227, 198, .42), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero__readout .eyebrow {
  color: var(--mist);
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__readout .focus-number {
  position: relative;
  z-index: 1;
  color: var(--cyan);
  margin: 8px 0 12px;
}

.page-faq .faq-hero__readout-note {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: rgba(251, 250, 247, .84);
}

/* ---------- 左窄栏 / 右内容 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-split__rail .note {
  margin-top: 14px;
}

.page-faq .faq-split__body > .lede {
  margin-top: 0;
}

/* ---------- 自检清单 ---------- */
.page-faq .faq-check {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-check li {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-check label {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  cursor: pointer;
  font-size: .95rem;
  line-height: 1.72;
}

.page-faq .faq-check input {
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  accent-color: var(--water);
}

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

.page-faq .faq-check li:has(input:checked) {
  border-color: var(--cyan);
  background: rgba(191, 239, 232, .3);
}

.page-faq .faq-check li:has(input:checked) span {
  color: var(--muted);
}

/* ---------- 四步流程 ---------- */
.page-faq .faq-replay__plate {
  margin: 28px 0 34px;
}

.page-faq .faq-steps .tabs__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-faq .faq-steps .tabs__tab {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  text-align: left;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-steps .tabs__tab:hover {
  border-color: var(--water);
}

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

.page-faq .faq-steps .tabs__tab[aria-selected="true"] {
  border-color: var(--water);
  background: rgba(8, 52, 79, .07);
}

.page-faq .faq-steps__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: .95rem;
  letter-spacing: .02em;
  color: var(--water);
}

.page-faq .faq-steps__name {
  font-size: .95rem;
  line-height: 1.5;
}

.page-faq .faq-steps .tabs__panel {
  margin-top: 20px;
  padding: 22px 22px 24px;
  border-radius: var(--radius);
  border-left: 3px solid var(--cyan);
  background: var(--sand);
  font-size: .96rem;
  line-height: 1.82;
}

.page-faq .faq-steps .tabs__panel[hidden] {
  display: none;
}

.page-faq .faq-steps .tabs__panel > p {
  margin: 0;
  max-width: 40em;
}

.page-faq .faq-steps__trap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-top: 16px !important;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: .92rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 口径决策树 ---------- */
.page-faq .faq-caliber__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-bottom: var(--faq-gap);
}

.page-faq .faq-tree {
  display: grid;
  gap: 12px;
}

.page-faq .faq-branch {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  overflow: hidden;
  transition: border-color .2s var(--ease);
}

.page-faq .faq-branch[open] {
  border-color: var(--water);
}

.page-faq .faq-branch summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: .98rem;
  font-weight: 500;
  line-height: 1.62;
}

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

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

.page-faq .faq-branch summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--water);
}

.page-faq .faq-branch[open] summary::after {
  content: "–";
}

.page-faq .faq-branch__tag {
  flex: none;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--sand);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .faq-branch__tag--open {
  border-color: rgba(193, 64, 46, .38);
  background: rgba(193, 64, 46, .08);
  color: var(--cinnabar);
}

.page-faq .faq-branch__tag--done {
  border-color: rgba(35, 227, 198, .55);
  background: rgba(191, 239, 232, .32);
  color: var(--water);
}

.page-faq .faq-branch__body {
  padding: 16px 18px 22px;
  border-top: 1px solid var(--line);
  background: var(--paper);
  font-size: .95rem;
  line-height: 1.82;
}

.page-faq .faq-branch__body > p {
  margin: 0;
  max-width: 40em;
}

.page-faq .faq-branch__body > p + p {
  margin-top: 14px;
}

/* ---------- 筛选排查顺序 ---------- */
.page-faq .faq-filter__intro {
  max-width: 46em;
}

.page-faq .faq-filter__list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-filter__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-filter__n {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--water);
}

.page-faq .faq-filter__item h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
}

.page-faq .faq-filter__item p {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 纠错提交 ---------- */
.page-faq .faq-report__grid {
  display: grid;
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-report__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-report__list li {
  position: relative;
  padding-left: 24px;
  font-size: .95rem;
  line-height: 1.78;
}

.page-faq .faq-report__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 12px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 联络 ---------- */
.page-faq .faq-contact {
  position: relative;
  overflow: hidden;
  color: var(--paper);
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  left: -12%;
  top: -40%;
  width: min(420px, 62vw);
  height: min(420px, 62vw);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(35, 227, 198, .2), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-contact .wrap {
  position: relative;
}

.page-faq .faq-contact .eyebrow {
  color: var(--mist);
}

.page-faq .faq-contact h2 {
  color: var(--paper);
}

.page-faq .faq-contact .lede {
  color: rgba(251, 250, 247, .82);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--faq-deep-rule);
  background: rgba(251, 250, 247, .07);
  backdrop-filter: blur(6px);
}

.page-faq .faq-contact__k {
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-faq .faq-contact__v {
  font-family: var(--font-mono);
  font-size: .97rem;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-all;
}

.page-faq .faq-contact__v a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 227, 198, .5);
}

.page-faq .faq-contact__v a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-contact__v a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-contact__hint {
  font-size: .84rem;
  line-height: 1.7;
  color: rgba(251, 250, 247, .68);
}

.page-faq .faq-contact__tail {
  margin: 26px 0 0;
  max-width: 46em;
  font-size: .92rem;
  line-height: 1.85;
  color: rgba(251, 250, 247, .82);
}

.page-faq .faq-contact__tail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(35, 227, 198, .5);
}

.page-faq .faq-contact__tail a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 48em) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(26px, 4vw, 56px);
  }

  .page-faq .faq-split {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(26px, 4vw, 52px);
  }

  .page-faq .faq-split__rail {
    position: sticky;
    top: 118px;
    align-self: start;
  }

  .page-faq .faq-caliber__grid {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: start;
  }

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

  .page-faq .faq-report__grid {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    gap: clamp(26px, 4vw, 52px);
  }

  .page-faq .faq-filter__item {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 24px;
    padding: 22px 0;
  }
}

@media (min-width: 64em) {
  .page-faq .faq-steps .tabs__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-steps .tabs__tab {
    align-items: center;
    border: 0;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    padding: 16px 14px 15px;
  }

  .page-faq .faq-steps .tabs__tab[aria-selected="true"] {
    background: transparent;
    border-bottom-color: var(--cyan);
  }

  .page-faq .faq-steps__num::after {
    content: "";
    display: inline-block;
    width: 16px;
    height: 2px;
    margin-left: 9px;
    vertical-align: middle;
    background: var(--cyan);
  }

  .page-faq .faq-steps .tabs__panel {
    padding: 28px 30px 30px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-check li,
  .page-faq .faq-steps .tabs__tab,
  .page-faq .faq-branch {
    transition: none;
  }
}