.page-faq {
  --faq-gap: clamp(20px, 3vw, 40px);
  --faq-pad: clamp(32px, 5vw, 64px);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -45%;
  right: -12%;
  width: 58%;
  height: 150%;
  background: linear-gradient(152deg, rgba(27, 227, 198, 0.11), rgba(123, 77, 255, 0.07) 46%, transparent 72%);
  transform: skewX(-12deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 55%, transparent 88%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(44px, 8vw, 96px) var(--gutter) clamp(24px, 4vw, 40px);
}

.page-faq .page-faq__crumbs {
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-faq .page-faq__crumbs .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .page-faq__crumbs .breadcrumbs__link {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur);
}

.page-faq .page-faq__crumbs .breadcrumbs__link:hover,
.page-faq .page-faq__crumbs .breadcrumbs__link:focus-visible {
  color: var(--cyan);
}

.page-faq .page-faq__crumbs .breadcrumbs__sep {
  color: rgba(143, 168, 161, 0.55);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 clamp(16px, 2vw, 24px);
  max-width: 15em;
  font-size: clamp(32px, 6.2vw, 68px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--white);
  overflow-wrap: break-word;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 36em;
  font-size: var(--step-body);
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-hero__figure {
  margin: 0 auto clamp(36px, 6vw, 64px);
  padding: 0 var(--gutter);
  max-width: var(--shell);
  border: 0;
  background: none;
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--line);
  object-fit: cover;
}

/* ---------- 分类跳转 ---------- */
.page-faq .faq-jump {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(28px, 4vw, 44px) var(--gutter) clamp(16px, 2.5vw, 26px);
}

.page-faq .faq-jump__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump__link {
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--dur), color var(--dur), background-color var(--dur);
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(27, 227, 198, 0.07);
}

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

/* ---------- 章节骨架 ---------- */
.page-faq .faq-section {
  max-width: var(--shell);
  margin: 0 auto;
  padding: var(--faq-pad) var(--gutter) 0;
  scroll-margin-top: 24px;
}

.page-faq .faq-section__head {
  display: grid;
  gap: 10px;
  padding-bottom: clamp(20px, 3vw, 30px);
  margin-bottom: clamp(22px, 3vw, 34px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section__index {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(143, 168, 161, 0.32);
  transition: color 320ms ease;
}

.page-faq .faq-section__head.is-visible .faq-section__index {
  color: var(--cyan);
}

.page-faq .faq-section__title {
  margin: 0;
  font-size: clamp(22px, 3.2vw, 38px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-section__desc {
  margin: 0;
  max-width: 36em;
  font-size: var(--step-body);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 快速上手三步 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-step {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--ink);
  border-left: 3px solid transparent;
  transition: border-color var(--dur), background-color var(--dur);
}

.page-faq .faq-step:hover {
  border-left-color: var(--cyan);
  background: var(--ink-2);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-faq .faq-step__title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--white);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-step__link {
  justify-self: start;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(27, 227, 198, 0.4);
  padding-bottom: 2px;
  transition: border-color var(--dur), color var(--dur);
}

.page-faq .faq-step__link:hover,
.page-faq .faq-step__link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

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

/* ---------- 问答卡片 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-list > li {
  display: flex;
}

.page-faq .faq-item {
  flex: 1 1 auto;
  width: 100%;
  background: var(--felt);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  transition: transform var(--dur), border-color var(--dur), background-color var(--dur);
}

.page-faq .faq-item:hover {
  transform: translateY(-4px);
  border-color: rgba(27, 227, 198, 0.5);
  border-left-color: var(--cyan);
}

.page-faq .faq-item[open] {
  background: #16453A;
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  padding: clamp(16px, 2vw, 22px) clamp(44px, 5vw, 58px) clamp(16px, 2vw, 22px) clamp(16px, 2vw, 22px);
  font-size: clamp(15px, 1.5vw, 16.5px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--white);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  top: clamp(15px, 1.9vw, 21px);
  right: clamp(16px, 2vw, 22px);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

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

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

.page-faq .faq-item__body {
  overflow: hidden;
  padding: 0 clamp(16px, 2vw, 22px) clamp(18px, 2.2vw, 24px);
}

.page-faq .faq-item[open] .faq-item__body {
  animation: faqReveal 200ms ease-out;
}

.page-faq .faq-item__conclusion {
  margin: 0 0 8px;
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.75;
  color: var(--cyan);
}

.page-faq .faq-item__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

@keyframes faqReveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 底部联系条 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(48px, 7vw, 88px);
  border-top: 1px solid var(--line);
  background: var(--ink-2);
  scroll-margin-top: 24px;
}

.page-faq .faq-contact__inner {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(32px, 5vw, 64px) var(--gutter);
}

.page-faq .faq-contact__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink);
}

.page-faq .faq-contact__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-contact__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .faq-contact__title {
  margin: 0 0 14px;
  font-size: clamp(23px, 3.2vw, 36px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-contact__text {
  margin: 0 0 24px;
  max-width: 36em;
  font-size: var(--step-body);
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .faq-contact__list {
  display: grid;
  gap: 10px;
  margin: 0 0 26px;
  padding: 0;
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact__label {
  min-width: 4.5em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .faq-contact__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* ---------- 响应式 ---------- */
@media (min-width: 780px) {
  .page-faq .faq-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-faq .faq-contact__inner {
    grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-section__head {
    grid-template-columns: 96px minmax(0, 1fr);
    column-gap: clamp(20px, 3vw, 40px);
  }

  .page-faq .faq-section__index {
    grid-column: 1;
    grid-row: 1 / span 2;
  }

  .page-faq .faq-section__title,
  .page-faq .faq-section__desc {
    grid-column: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item:hover {
    transform: none;
  }

  .page-faq .faq-item[open] .faq-item__body {
    animation: none;
  }
}