.page-faq {
  --faq-hair: #2A3B66;
  --faq-soft: rgba(244, 247, 252, .72);
  --faq-ink-soft: #44557A;
  background: var(--blue-deep);
  color: var(--white);
}

.page-faq a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-offset) + 26px) 0 clamp(46px, 7vw, 88px);
  border-bottom: 1px solid var(--faq-hair);
  background:
    radial-gradient(120% 90% at 88% 6%, rgba(255, 45, 70, .22), transparent 62%),
    radial-gradient(90% 80% at 4% 0%, rgba(111, 227, 212, .10), transparent 56%),
    var(--blue-deep);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(42, 59, 102, .38) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 59, 102, .38) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 76%);
}

.page-faq .faq-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-crumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-crumb .breadcrumb-link {
  color: rgba(244, 247, 252, .7);
  text-decoration: none;
  font-size: 13px;
}

.page-faq .faq-crumb .breadcrumb-link:hover,
.page-faq .faq-crumb .breadcrumb-link:focus-visible {
  color: var(--white);
}

.page-faq .faq-crumb .breadcrumb-item:last-child {
  color: var(--cyan);
  font-size: 13px;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-faq h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.6vw, 56px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -.02em;
  max-width: 15em;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--faq-soft);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-faq .faq-hero__quick {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 0;
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  padding: 16px 0 0;
  border-top: 1px solid rgba(42, 59, 102, .9);
}

.page-faq .faq-hero__quick li {
  display: flex;
  align-items: center;
}

.page-faq .faq-hero__quick li + li::before {
  content: "/";
  margin: 0 13px;
  color: var(--grid-blue);
  font-family: var(--font-mono);
}

.page-faq .faq-hero__quick a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

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

.page-faq .faq-hero__visual {
  margin: 0;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(42, 59, 102, .9);
  overflow: hidden;
}

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

/* ---------- 三步指引 ---------- */
.page-faq .faq-steps {
  position: relative;
  overflow: hidden;
  padding: clamp(50px, 8vw, 96px) 0 clamp(38px, 5vw, 62px);
  background: var(--blue-room);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-steps__bg {
  position: absolute;
  inset: 0;
  opacity: .2;
  pointer-events: none;
}

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

.page-faq .faq-steps__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-steps__head {
  border-bottom-color: rgba(42, 59, 102, .95);
}

.page-faq .faq-steps__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-steps__sub {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--faq-soft);
}

.page-faq .step-list {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  counter-reset: step;
}

.page-faq .step-card {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--faq-hair);
  background: rgba(11, 21, 51, .62);
  transition: transform .16s var(--ease), border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-faq .step-card:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 45, 70, .55);
}

.page-faq .step-card--active {
  border-color: var(--red);
  background: linear-gradient(180deg, rgba(255, 45, 70, .16), rgba(11, 21, 51, .9));
}

.page-faq .step-card--active::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--red);
}

.page-faq .step-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--red);
}

.page-faq .step-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--white);
}

.page-faq .step-text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--faq-soft);
}

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

.page-faq .step-hint {
  margin: 14px 0 0;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--amber);
  border-left: 2px solid var(--amber);
  background: rgba(255, 194, 75, .08);
}

.page-faq .step-hint a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .step-back {
  margin: 26px 0 0;
  text-align: right;
}

.page-faq .step-back a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--faq-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-hair);
  padding-bottom: 2px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

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

/* ---------- 问答区 ---------- */
.page-faq .faq-body {
  padding: clamp(50px, 8vw, 96px) 0;
  background: var(--white);
  color: var(--ink);
}

.page-faq .faq-body__head {
  border-bottom-color: var(--mist);
}

.page-faq .faq-body h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-body__head p {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-group {
  margin-top: clamp(30px, 4.5vw, 46px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 4px;
}

.page-faq .faq-group__head h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--mist);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color .16s var(--ease);
}

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

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

.page-faq .faq-item summary:hover .faq-q {
  color: var(--red-dark);
}

.page-faq .faq-idx {
  flex: 0 0 auto;
  min-width: 26px;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--red);
}

.page-faq .faq-q {
  flex: 1 1 auto;
  transition: color .16s var(--ease);
}

.page-faq .faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--red);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
}

.page-faq .faq-item[open] .faq-q {
  color: var(--red-dark);
}

.page-faq .faq-a {
  padding: 0 0 18px 40px;
}

.page-faq .faq-a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--faq-ink-soft);
}

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

.page-faq .step-back--light a {
  color: var(--ink);
  border-bottom-color: var(--mist);
}

.page-faq .step-back--light a:hover,
.page-faq .step-back--light a:focus-visible {
  color: var(--red-dark);
  border-bottom-color: var(--red-dark);
}

/* ---------- 术语速查 ---------- */
.page-faq .faq-terms {
  padding: clamp(50px, 8vw, 96px) 0;
  background:
    linear-gradient(180deg, var(--blue-deep), #091026);
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-terms__head {
  border-bottom-color: var(--faq-hair);
}

.page-faq .faq-terms__head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-terms__head p {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--faq-soft);
}

.page-faq .term-list {
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .term {
  display: grid;
  gap: 7px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(42, 59, 102, .75);
}

.page-faq .term dt {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--white);
}

.page-faq .term dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-soft);
}

/* ---------- 联系收束 ---------- */
.page-faq .faq-contact {
  position: relative;
  overflow: hidden;
  padding: clamp(46px, 7vw, 86px) 0;
  background: var(--blue-room);
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(52%, 560px);
  pointer-events: none;
  background: linear-gradient(160deg, rgba(255, 45, 70, .26), rgba(196, 18, 47, .04));
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0 100%);
}

.page-faq .faq-contact .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-contact__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-contact__text h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-contact__text p {
  margin: 14px 0 0;
  max-width: 32em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--faq-soft);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(244, 247, 252, .22);
}

.page-faq .faq-contact__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(244, 247, 252, .16);
}

.page-faq .contact-key {
  flex: 0 0 auto;
  min-width: 74px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-faq .contact-line {
  font-family: var(--font-mono);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.12fr .88fr;
  }

  .page-faq .step-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .page-faq .term-list {
    grid-template-columns: 1fr 1fr;
    column-gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .faq-contact__panel {
    grid-template-columns: 1.1fr .9fr;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-hero {
    padding-bottom: clamp(64px, 7vw, 96px);
  }

  .page-faq .faq-hero__visual {
    aspect-ratio: 16 / 10;
  }

  .page-faq .faq-a {
    padding-left: 40px;
    padding-right: 12%;
  }
}

@media (max-width: 520px) {
  .page-faq .faq-hero__actions .btn,
  .page-faq .faq-contact__actions .btn {
    width: 100%;
    text-align: center;
  }

  .page-faq .faq-item summary {
    gap: 10px;
    font-size: 15.5px;
  }

  .page-faq .faq-a {
    padding-left: 0;
  }

  .page-faq .step-back {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step-card,
  .page-faq .faq-item summary,
  .page-faq .faq-q,
  .page-faq .faq-hero__quick a,
  .page-faq .step-back a {
    transition: none;
  }

  .page-faq .step-card:hover {
    transform: none;
  }
}