.page-faq {
  --faq-gap: clamp(1rem, 2.4vw, 1.6rem);
  --faq-amber-soft-bg: rgba(242, 169, 59, 0.08);
  --faq-card-bg: rgba(17, 21, 28, 0.72);
  --faq-card-bg-2: rgba(26, 32, 43, 0.62);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

.page-faq .crumbs {
  padding: clamp(1.1rem, 3vw, 1.8rem) 0 0;
  color: var(--mist);
  font-size: 0.82rem;
}

.page-faq .crumbs__item {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .crumbs__item:hover,
.page-faq .crumbs__item:focus-visible {
  color: var(--amber-soft);
}

.page-faq .crumbs__sep {
  margin: 0 0.45rem;
  opacity: 0.6;
}

/* 首屏 */
.page-faq .faq-hero {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(1.3rem, 3.6vw, 2.4rem) 0 clamp(1.8rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__text {
  min-width: 0;
}

.page-faq .faq-hero__text > * + * {
  margin-top: 0.85rem;
}

.page-faq .faq-hero .eyebrow {
  margin: 0;
  color: var(--cyan);
  letter-spacing: 0.22em;
}

.page-faq .faq-hero .display {
  margin: 0;
  font-size: clamp(1.95rem, 7.4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(0.96rem, 2.2vw, 1.05rem);
  line-height: 1.85;
  color: var(--text);
  opacity: 0.86;
}

.page-faq .faq-hero__media {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  align-self: start;
}

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

/* 三步 */
.page-faq .faq-start {
  padding: clamp(1.8rem, 4vw, 3rem) 0 clamp(1.4rem, 3vw, 2.2rem);
}

.page-faq .faq-start .h2 {
  margin: 0;
  font-size: clamp(1.3rem, 3.6vw, 1.85rem);
  letter-spacing: -0.01em;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 1.3rem 0 0;
  padding: 0;
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-step {
  min-width: 0;
  padding: 1.1rem 1.15rem 1.3rem;
  border: 1px solid var(--line);
  border-top: 2px solid var(--amber);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, var(--faq-card-bg-2), var(--faq-card-bg));
}

.page-faq .faq-step__num {
  display: block;
  font-size: 1.45rem;
  line-height: 1;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-faq .faq-step:nth-child(2) {
  border-top-color: var(--cyan);
}

.page-faq .faq-step:nth-child(2) .faq-step__num {
  color: var(--cyan);
}

.page-faq .faq-step:nth-child(3) {
  border-top-color: var(--rose);
}

.page-faq .faq-step:nth-child(3) .faq-step__num {
  color: var(--rose);
}

.page-faq .faq-step .h3 {
  margin: 0.5rem 0 0.45rem;
  font-size: 1.08rem;
  color: var(--text);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--text);
  opacity: 0.84;
}

.page-faq .faq-note {
  margin: 1.1rem 0 0;
  padding-left: 0.85rem;
  border-left: 2px solid var(--cyan);
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--mist);
}

/* 索引 + 问答主体 */
.page-faq .faq-shell {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(0.8rem, 2.4vw, 1.6rem);
}

.page-faq .faq-index {
  display: none;
}

.page-faq .faq-index__title {
  margin: 0 0 0.7rem;
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.12rem;
}

.page-faq .faq-index__item {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.45rem 0.6rem;
  border-left: 2px solid transparent;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  color: var(--amber-soft);
  border-left-color: var(--amber);
  background: var(--faq-amber-soft-bg);
}

.page-faq .faq-index__num {
  font-size: 0.76rem;
}

.page-faq .faq-index__label {
  font-size: 0.9rem;
}

.page-faq .faq-body {
  min-width: 0;
}

/* 筛选 */
.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: clamp(1.1rem, 3vw, 1.6rem);
}

.page-faq .faq-chips .chip {
  padding: 0.42rem 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--faq-card-bg-2);
  color: var(--text);
  font-size: 0.84rem;
  line-height: 1.4;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-chips .chip:hover {
  border-color: var(--amber);
  color: var(--amber-soft);
}

.page-faq .faq-chips .chip[aria-pressed="true"] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
  font-weight: 700;
}

.page-faq .faq-chips .chip:focus-visible {
  outline: 2px solid var(--amber-soft);
  outline-offset: 2px;
}

/* 分组 */
.page-faq .faq-group {
  padding: clamp(1.2rem, 3vw, 1.9rem) 0;
  min-width: 0;
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.75rem;
  margin-bottom: 0.95rem;
}

.page-faq .faq-group__num {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--amber);
  opacity: 0.9;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(1.15rem, 3.2vw, 1.55rem);
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-group__meta {
  flex-basis: 100%;
  margin: 0;
  font-size: 0.82rem;
  color: var(--mist);
}

/* 折叠问答 */
.page-faq .fold {
  margin-bottom: 0.65rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--faq-card-bg);
  overflow: hidden;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .fold:hover {
  border-color: rgba(242, 169, 59, 0.42);
}

.page-faq .fold__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.9rem;
  width: 100%;
  padding: 0.9rem clamp(0.85rem, 2.4vw, 1.2rem);
  border: 0;
  background: none;
  color: var(--text);
  font-family: inherit;
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.65;
  text-align: left;
  cursor: pointer;
  transition: color 0.18s var(--ease);
}

.page-faq .fold__head::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--amber);
}

.page-faq .fold__head[aria-expanded="true"] {
  color: var(--amber-soft);
}

.page-faq .fold__head[aria-expanded="true"]::after {
  content: "–";
}

.page-faq .fold__head:focus-visible {
  outline: 2px solid var(--amber-soft);
  outline-offset: -2px;
}

.page-faq .fold__body {
  padding: 0 clamp(0.85rem, 2.4vw, 1.2rem) 1.05rem;
  color: var(--text);
}

.page-faq .fold__body p {
  margin: 0 0 0.6rem;
  font-size: 0.94rem;
  line-height: 1.85;
  opacity: 0.86;
}

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

.page-faq .fold__body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .fold__body a:hover,
.page-faq .fold__body a:focus-visible {
  color: var(--amber-soft);
}

.page-faq .faq-steps-list {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.45rem;
}

.page-faq .faq-steps-list li {
  font-size: 0.94rem;
  line-height: 1.8;
  opacity: 0.86;
}

.page-faq .faq-steps-list li::marker {
  color: var(--amber);
  font-family: var(--font-mono);
}

/* 比例清单 */
.page-faq .faq-ratios {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

.page-faq .faq-ratio {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
  padding: 0.6rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--faq-card-bg-2);
}

.page-faq .faq-ratio__box {
  flex: 0 0 auto;
  display: block;
  height: 30px;
  border: 1px solid var(--cyan);
  border-radius: 3px;
  background: rgba(40, 224, 208, 0.12);
}

.page-faq .faq-ratio__box--169 { width: 54px; }
.page-faq .faq-ratio__box--1610 { width: 48px; }
.page-faq .faq-ratio__box--219 { width: 70px; }
.page-faq .faq-ratio__box--43 { width: 40px; }
.page-faq .faq-ratio__box--916 { width: 17px; }
.page-faq .faq-ratio__box--11 { width: 30px; }

.page-faq .faq-ratio__txt {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
  min-width: 0;
}

.page-faq .faq-ratio__label {
  font-size: 0.82rem;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-faq .faq-ratio__use {
  font-size: 0.74rem;
  color: var(--mist);
  line-height: 1.4;
}

.page-faq .faq-screen__media {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

/* 联系支持 */
.page-faq .faq-contact {
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
}

.page-faq .faq-contact__panel {
  padding: clamp(1.15rem, 3.4vw, 2.2rem);
  border-radius: var(--r-lg);
  background: linear-gradient(155deg, rgba(26, 32, 43, 0.95), rgba(10, 12, 16, 0.92));
  border: 1px solid var(--line-strong);
}

.page-faq .faq-contact__panel .eyebrow {
  margin: 0;
  color: var(--rose);
  letter-spacing: 0.2em;
}

.page-faq .faq-contact__panel .h2 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.3rem, 3.8vw, 1.8rem);
  letter-spacing: -0.01em;
}

.page-faq .faq-contact__intro {
  margin: 0.65rem 0 0;
  max-width: 62ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--text);
  opacity: 0.84;
}

.page-faq .faq-contact__list {
  margin: 1.2rem 0 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 0.2rem;
  padding: 0.6rem 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__row dt {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__row dd a {
  color: var(--amber-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 210, 122, 0.4);
}

.page-faq .faq-contact__row dd a:hover,
.page-faq .faq-contact__row dd a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.3rem;
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-faq .faq-contact__row {
    grid-template-columns: 6rem minmax(0, 1fr);
    align-items: baseline;
    gap: 0.75rem;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
    gap: clamp(1.5rem, 3.5vw, 3rem);
  }

  .page-faq .faq-group__meta {
    flex-basis: auto;
    margin-left: auto;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-shell {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: clamp(1.5rem, 3vw, 2.6rem);
    align-items: start;
  }

  .page-faq .faq-index {
    display: block;
    position: sticky;
    top: 1.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chips .chip,
  .page-faq .fold,
  .page-faq .fold__head,
  .page-faq .faq-index__item {
    transition: none;
  }
}
</as>