.page-faq {
  --faq-mute: #5D6C66;
  --faq-line: rgba(30, 42, 40, .2);
  --faq-gap: clamp(20px, 3vw, 40px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 62px) 0 clamp(28px, 4vw, 54px);
  background: var(--ink);
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(30, 42, 40, .7) 0 1px, transparent 1px 74px),
    repeating-linear-gradient(0deg, rgba(30, 42, 40, .5) 0 1px, transparent 1px 74px);
  opacity: .5;
}

.page-faq .faq-hero > .wrap {
  position: relative;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(16px, 2.4vw, 30px);
  align-items: end;
}

.page-faq .faq-hero__flag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--green);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: clamp(30px, 6.6vw, 58px);
  line-height: 1.08;
  color: var(--paper);
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 46em;
  color: #C3D2CB;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--steel);
}

.page-faq .faq-hero__meta li {
  position: relative;
  padding-left: 14px;
}

.page-faq .faq-hero__meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 6px;
  height: 6px;
  background: var(--green);
}

.page-faq .faq-hero__fig {
  border: 1px solid var(--grid);
}

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

/* ---------- 浅色问答区 ---------- */

.page-faq .faq-body {
  padding: clamp(28px, 4.5vw, 60px) 0 clamp(38px, 6vw, 82px);
  background: var(--mist);
  color: var(--ink);
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

/* 主题索引 */

.page-faq .faq-index {
  border: 1px solid var(--faq-line);
  border-top: 3px solid var(--ink);
  background: #FFFFFF;
  padding: 18px 18px 20px;
}

.page-faq .faq-index__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .02em;
}

.page-faq .faq-index__hint {
  margin: 6px 0 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--faq-mute);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: idx;
}

.page-faq .faq-index__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 10px;
  border-top: 1px solid var(--faq-line);
  border-left: 3px solid transparent;
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-index__list li:last-child .faq-index__item {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  border-left-color: var(--green);
  background: rgba(22, 192, 90, .08);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  color: var(--green);
}

.page-faq .faq-index__text {
  font-size: 14.5px;
  line-height: 1.5;
}

.page-faq .faq-index__badge {
  margin-left: auto;
  min-width: 24px;
  padding: 2px 6px;
  text-align: center;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  color: var(--ink);
  background: var(--green);
}

.page-faq .faq-index__foot {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--faq-mute);
}

.page-faq .faq-index__foot a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid var(--teal);
}

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

/* ---------- 问答分组 ---------- */

.page-faq .faq-stream {
  display: grid;
  gap: clamp(30px, 4.5vw, 56px);
  min-width: 0;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--ink);
}

.page-faq .faq-group__no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 26px;
  height: 24px;
  padding: 0 6px;
  background: var(--green);
  color: var(--ink);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(18px, 2.4vw, 23px);
  line-height: 1.35;
}

.page-faq .faq-group__hint {
  flex: 1 1 100%;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--faq-mute);
}

.page-faq .faq-group__hint a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(12, 59, 58, .4);
}

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

.page-faq .faq-shot {
  margin: 16px 0 4px;
  border: 1px solid var(--faq-line);
}

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

/* ---------- 折叠问答卡 ---------- */

.page-faq .faq-list {
  margin-top: 12px;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  border-left: 3px solid rgba(30, 42, 40, .3);
  background: #FFFFFF;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item[open] {
  border-left-color: var(--green);
}

.page-faq .faq-item:hover {
  border-left-color: var(--green);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 46px 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.55;
  color: var(--ink);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  right: 15px;
  top: 13px;
  width: 20px;
  text-align: center;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.4;
  color: var(--green);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
  color: var(--orange);
}

.page-faq .faq-item__qno {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--faq-mute);
}

.page-faq .faq-item__a {
  padding: 14px 16px 18px;
  border-top: 1px dashed var(--faq-line);
  font-size: 15.5px;
  line-height: 1.8;
  color: #22302C;
}

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

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

.page-faq .faq-item__tail {
  padding-left: 12px;
  border-left: 2px solid var(--green);
  color: var(--faq-mute);
  font-size: 14.5px;
}

.page-faq .faq-item__a a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(12, 59, 58, .4);
}

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

.page-faq .faq-val {
  display: inline-block;
  padding: 0 6px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: .93em;
  background: var(--orange);
  color: #1A0B04;
}

/* ---------- 步骤条 ---------- */

.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}

.page-faq .faq-step {
  position: relative;
  padding-left: 34px;
  margin-bottom: 12px;
}

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

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 24px;
  bottom: -12px;
  width: 1px;
  background: var(--faq-line);
}

.page-faq .faq-step:last-child::before {
  display: none;
}

.page-faq .faq-step__label {
  display: block;
  cursor: pointer;
}

.page-faq .faq-step input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-step__box {
  position: absolute;
  left: 0;
  top: 3px;
  width: 21px;
  height: 21px;
  border: 1px solid rgba(30, 42, 40, .45);
  background: #FFFFFF;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-step__box::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 2px;
  width: 6px;
  height: 11px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(42deg);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.page-faq .faq-step input:checked ~ .faq-step__box {
  background: var(--green);
  border-color: var(--green);
}

.page-faq .faq-step input:checked ~ .faq-step__box::after {
  opacity: 1;
}

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

.page-faq .faq-step__text {
  display: block;
  font-size: 15px;
  line-height: 1.75;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-step input:checked ~ .faq-step__text {
  color: var(--faq-mute);
}

/* ---------- 兜底联系 ---------- */

.page-faq .faq-help {
  padding: clamp(30px, 5vw, 66px) 0;
  background: var(--teal);
  border-top: 1px solid var(--grid);
  color: var(--paper);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

.page-faq .faq-help__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.01em;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-help__lede {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.8;
  color: #B9CFC9;
}

.page-faq .faq-checklist {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
  counter-reset: fc;
}

.page-faq .faq-checklist li {
  position: relative;
  padding-left: 34px;
  font-size: 15px;
  line-height: 1.7;
  color: #DCE7E3;
}

.page-faq .faq-checklist li::before {
  counter-increment: fc;
  content: counter(fc);
  position: absolute;
  left: 0;
  top: 1px;
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  color: var(--ink);
  background: var(--green);
}

.page-faq .faq-contact {
  align-self: start;
  padding: 20px;
  border: 1px solid rgba(232, 239, 234, .28);
  background: rgba(11, 15, 14, .35);
}

.page-faq .faq-contact__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--green);
}

.page-faq .faq-contact__v {
  margin: 4px 0 16px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-all;
}

.page-faq .faq-contact .btn {
  display: inline-block;
  margin-top: 4px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 56px);
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: minmax(216px, 1fr) minmax(0, 2.4fr);
    gap: clamp(26px, 3.4vw, 48px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 22px);
  }
}

@media (max-width: 480px) {
  .page-faq .faq-item__q {
    padding-right: 40px;
    gap: 8px;
  }

  .page-faq .faq-item__qno {
    font-size: 11px;
  }

  .page-faq .faq-contact__v {
    font-size: 13.5px;
  }
}