.page-faq {
  --faq-card-radius: 22px;
  --faq-chapter-gap: 40px;
  background-color: var(--pdc-ink);
  color: var(--pdc-white);
}

.page-faq .site-container {
  width: min(100% - 40px, var(--pdc-content-max));
  margin-inline: auto;
}

.page-faq img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- Hero ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 56px 0 64px;
  overflow: hidden;
  background:
    radial-gradient(circle at 84% 16%, rgba(0, 176, 255, 0.10) 0%, transparent 44%),
    radial-gradient(circle at 8% 92%, rgba(0, 230, 118, 0.06) 0%, transparent 36%),
    var(--pdc-ink);
}

.page-faq .faq-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 36px;
  font-size: 14px;
  color: var(--pdc-gray);
}

.page-faq .faq-breadcrumb a {
  color: var(--pdc-blue);
  text-decoration: none;
}

.page-faq .faq-breadcrumb a:hover {
  color: var(--pdc-pale-green);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-faq .faq-hero__content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--pdc-font-display);
  font-size: clamp(38px, 6vw, 70px);
  line-height: 1.12;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--pdc-gray);
}

.page-faq .faq-hero__lead strong {
  color: var(--pdc-white);
  font-weight: 600;
}

.page-faq .faq-hero__index {
  width: 100%;
  margin-top: 10px;
  padding: 22px 22px 18px;
  border: 1px solid var(--pdc-border);
  border-radius: var(--pdc-radius-lg);
  background:
    linear-gradient(135deg, rgba(0, 230, 118, 0.05), transparent 60%),
    var(--pdc-card);
}

.page-faq .faq-hero__index-title {
  margin: 0 0 14px;
  font-family: var(--pdc-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--pdc-pale-green);
}

.page-faq .faq-hero__index ol {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-faq .faq-hero__index a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px;
  border-radius: 12px;
  font-size: 15px;
  line-height: 1.45;
  color: var(--pdc-white);
  text-decoration: none;
  transition: background-color 0.25s var(--pdc-ease), color 0.25s var(--pdc-ease);
}

.page-faq .faq-hero__index a:hover,
.page-faq .faq-hero__index a.is-active {
  background: var(--pdc-blue-tint);
  color: var(--pdc-pale-green);
}

.page-faq .faq-hero__index span {
  font-family: var(--pdc-font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--pdc-green);
  min-width: 26px;
}

.page-faq .faq-hero__art .pdc-frame {
  position: relative;
  padding: 14px;
  background: var(--pdc-card);
  border-radius: 26px;
}

.page-faq .faq-hero__art .pdc-frame::before,
.page-faq .faq-hero__art .pdc-frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border-style: solid;
  z-index: 1;
}

.page-faq .faq-hero__art .pdc-frame::before {
  top: -2px;
  left: -2px;
  border-width: 3px 0 0 3px;
  border-color: var(--pdc-green);
  border-radius: 26px 0 0 0;
}

.page-faq .faq-hero__art .pdc-frame::after {
  bottom: -2px;
  right: -2px;
  border-width: 0 3px 3px 0;
  border-color: var(--pdc-blue);
  border-radius: 0 0 26px 0;
}

.page-faq .faq-hero__art img {
  width: 100%;
  border-radius: 18px;
  object-fit: cover;
}

.page-faq .faq-hero__art-note {
  margin: 14px 0 0;
  font-family: var(--pdc-font-mono);
  font-size: 12px;
  color: var(--pdc-gray);
  text-align: right;
  letter-spacing: 0.04em;
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter {
  padding: 64px 0 72px;
  border-bottom: 1px solid rgba(248, 250, 252, 0.05);
}

.page-faq .faq-chapter--alt {
  border-top: 1px solid rgba(248, 250, 252, 0.05);
  background:
    repeating-linear-gradient(
      -45deg,
      rgba(255, 255, 255, 0.012) 0 1px,
      transparent 1px 16px
    ),
    var(--pdc-carbon);
}

.page-faq .faq-chapter__grid {
  display: grid;
  gap: var(--faq-chapter-gap);
}

.page-faq .faq-chapter__head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.page-faq .faq-chapter__head .pdc-section-index {
  margin-bottom: 4px;
  font-family: var(--pdc-font-mono);
  font-size: 84px;
  font-weight: 700;
  line-height: 0.9;
  color: rgba(248, 250, 252, 0.04);
  -webkit-text-stroke: 1px rgba(248, 250, 252, 0.18);
  user-select: none;
}

.page-faq .faq-chapter__head h2,
.page-faq .faq-contact__text h2 {
  margin: 0;
  font-family: var(--pdc-font-display);
  font-size: 34px;
  line-height: 1.25;
}

.page-faq .faq-chapter__desc {
  margin: 0;
  font-size: 14px;
  color: var(--pdc-gray);
  line-height: 1.6;
}

.page-faq .faq-chapter__head::after {
  content: "";
  display: block;
  width: 56px;
  height: 4px;
  margin-top: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--pdc-green), var(--pdc-blue));
}

.page-faq .faq-chapter__list {
  display: grid;
  gap: 16px;
  align-content: start;
}

/* ---------- 问答卡片 ---------- */
.page-faq .faq-qa {
  position: relative;
  overflow: hidden;
  background: var(--pdc-card);
  border: 1px solid transparent;
  border-radius: var(--faq-card-radius);
  transition: background-color 0.3s var(--pdc-ease), border-color 0.3s var(--pdc-ease);
}

.page-faq .faq-qa::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--pdc-green);
  opacity: 0;
  border-radius: 0 4px 4px 0;
  transition: opacity 0.3s var(--pdc-ease);
}

.page-faq .faq-qa[open] {
  background: rgba(15, 27, 45, 0.92);
  border-color: rgba(0, 230, 118, 0.16);
}

.page-faq .faq-qa[open]::before {
  opacity: 1;
}

.page-faq .faq-qa summary {
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px 24px 22px;
  cursor: pointer;
  user-select: none;
}

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

.page-faq .faq-qa__num {
  flex-shrink: 0;
  min-width: 44px;
  padding: 6px 8px;
  border-radius: 12px;
  background: rgba(0, 230, 118, 0.08);
  font-family: var(--pdc-font-mono);
  font-size: 15px;
  font-weight: 700;
  text-align: center;
  color: var(--pdc-green);
}

.page-faq .faq-qa__title {
  flex: 1;
  min-width: 0;
  position: relative;
  padding-right: 30px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--pdc-white);
}

.page-faq .faq-qa__title::after {
  content: "+";
  position: absolute;
  top: 0;
  right: 0;
  font-family: var(--pdc-font-mono);
  font-size: 22px;
  font-weight: 400;
  line-height: 1.1;
  color: var(--pdc-blue);
  transition: transform 0.3s var(--pdc-ease), color 0.3s var(--pdc-ease);
}

.page-faq .faq-qa[open] .faq-qa__title::after {
  transform: rotate(45deg);
  color: var(--pdc-green);
}

.page-faq .faq-qa__body {
  display: grid;
  gap: 10px;
  padding: 0 24px 26px;
  color: var(--pdc-gray);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-qa__body p {
  margin: 0;
}

.page-faq .faq-qa__body .pdc-tag {
  display: inline-block;
  margin: 0 4px;
}

.page-faq .faq-qa__body a {
  color: var(--pdc-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--pdc-ease), border-color 0.2s var(--pdc-ease);
}

.page-faq .faq-qa__body a:hover {
  color: var(--pdc-pale-green);
  border-color: currentColor;
}

/* ---------- 联系区 ---------- */
.page-faq .faq-contact {
  position: relative;
  padding: 80px 0 88px;
  overflow: hidden;
  background:
    radial-gradient(circle at 14% 18%, rgba(255, 109, 0, 0.08) 0%, transparent 36%),
    radial-gradient(circle at 90% 84%, rgba(0, 230, 118, 0.08) 0%, transparent 30%),
    var(--pdc-ink);
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--pdc-green), var(--pdc-blue), var(--pdc-orange));
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-faq .faq-contact__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.page-faq .faq-contact__intro {
  margin: 6px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--pdc-gray);
}

.page-faq .faq-contact__list {
  display: grid;
  gap: 14px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  width: 100%;
}

.page-faq .faq-contact__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 22px;
  background: var(--pdc-card);
  border-left: 3px solid var(--pdc-green);
  border-radius: 18px;
}

.page-faq .faq-contact__label {
  font-family: var(--pdc-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pdc-gray);
}

.page-faq .faq-contact__value {
  font-size: 16px;
  font-weight: 600;
  color: var(--pdc-white);
  word-break: break-all;
}

.page-faq .faq-contact__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--pdc-gray);
  max-width: 52ch;
}

.page-faq .faq-contact__more {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 24px;
  border: 1px solid var(--pdc-blue);
  border-radius: var(--pdc-radius-pill);
  color: var(--pdc-blue);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.25s var(--pdc-ease), color 0.25s var(--pdc-ease), border-color 0.25s var(--pdc-ease);
}

.page-faq .faq-contact__more:hover {
  background: rgba(0, 176, 255, 0.12);
  color: var(--pdc-white);
  border-color: var(--pdc-green);
}

.page-faq .faq-contact__visual .pdc-media {
  border-radius: 26px;
  overflow: hidden;
  background: var(--pdc-card);
  border: 1px solid var(--pdc-border);
}

.page-faq .faq-contact__visual img {
  width: 100%;
  object-fit: cover;
}

.page-faq .faq-contact__visual figcaption {
  padding: 14px 18px;
  font-family: var(--pdc-font-mono);
  font-size: 12px;
  color: var(--pdc-gray);
  line-height: 1.5;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
  }

  .page-faq .faq-chapter {
    padding: 80px 0 88px;
  }

  .page-faq .faq-chapter__grid {
    grid-template-columns: 300px 1fr;
    gap: 56px;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: 1fr 0.95fr;
    gap: 56px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-hero {
    padding: 72px 0 80px;
  }

  .page-faq .faq-hero__grid {
    gap: 72px;
  }

  .page-faq .faq-chapter {
    padding: 112px 0 120px;
  }

  .page-faq .faq-chapter__grid {
    grid-template-columns: 360px 1fr;
    gap: 88px;
  }

  .page-faq .faq-contact {
    padding: 112px 0 120px;
  }

  .page-faq .faq-contact__grid {
    gap: 88px;
  }

  .page-faq .faq-qa__body {
    padding-left: 84px;
    padding-right: 40px;
  }
}