.page-faq {
  --faq-body-max: 720px;
  --faq-num-col: 104px;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: 44px 60px;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -45%;
  right: -12%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(255, 77, 0, 0.22), rgba(0, 200, 255, 0.06) 45%, transparent 70%);
  pointer-events: none;
}

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

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  font-size: 13px;
  color: var(--muted);
}

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

.page-faq .breadcrumb a:hover {
  color: var(--arc);
}

.page-faq .breadcrumb__sep {
  color: var(--grid);
}

.page-faq .faq-hero .eyebrow {
  color: var(--orange);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 18px;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(32px, 7vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero .lede {
  max-width: 620px;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.8;
}

.page-faq .faq-filter {
  display: grid;
  gap: 10px;
  max-width: 460px;
  margin-top: 34px;
}

.page-faq .faq-filter label {
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--arc);
}

.page-faq .faq-filter input {
  width: 100%;
  box-sizing: border-box;
  padding: 14px 16px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.4;
  color: var(--paper);
  background: var(--panel);
  border: 1px solid var(--grid);
  border-radius: 2px;
}

.page-faq .faq-filter input::placeholder {
  color: var(--muted);
}

.page-faq .faq-filter input:focus {
  outline: 1px solid var(--cyan);
  outline-offset: 2px;
  border-color: var(--arc);
}

/* 布局 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding-block: 44px 88px;
}

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

/* 章节 */
.page-faq .faq-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-block: 42px;
  border-top: 1px solid var(--grid);
}

.page-faq .faq-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-chapter__num {
  align-self: start;
}

.page-faq .faq-chapter__num .chapter-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 300;
  line-height: 1;
  color: var(--orange);
}

.page-faq .faq-chapter__body {
  min-width: 0;
  max-width: var(--faq-body-max);
}

.page-faq .faq-chapter__body h2 {
  margin: 10px 0 16px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faq-chapter__body .eyebrow {
  color: var(--muted);
}

/* 浅色章节 */
.page-faq .faq-chapter--light {
  padding: 28px 20px 32px;
  background: var(--paper);
  color: var(--text-dark);
  border-top: 0;
}

.page-faq .faq-chapter--light .eyebrow {
  color: var(--orange);
}

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

/* 步骤条 */
.page-faq .step-bar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .step {
  padding-top: 18px;
  border-top: 2px solid var(--paper-2);
}

.page-faq .step:first-child {
  border-top-color: var(--orange);
}

.page-faq .step__dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  margin-bottom: 10px;
  border-radius: 50%;
  background: var(--orange);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.page-faq .step h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
}

.page-faq .step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(10, 12, 16, 0.7);
}

.page-faq .faq-tip {
  margin: 22px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(10, 12, 16, 0.68);
}

/* 图片 */
.page-faq .faq-figure {
  margin: 24px 0 28px;
}

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

/* 问答折叠 */
.page-faq .qa-list {
  margin-top: 6px;
  border-bottom: 1px solid var(--grid);
}

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

.page-faq .qa[open] {
  box-shadow: inset 3px 0 0 var(--orange);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 12px 18px 6px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa summary:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: -1px;
}

.page-faq .q-num {
  flex: none;
  width: 34px;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .qa[open] .q-num {
  color: var(--orange);
}

.page-faq .q-text {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--paper);
  transition: color 0.24s var(--ease);
}

.page-faq .qa summary:hover .q-text {
  color: var(--arc);
}

.page-faq .q-plus {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 6px;
  margin-left: auto;
  transition: transform 0.24s var(--ease);
}

.page-faq .q-plus::before,
.page-faq .q-plus::after {
  content: "";
  position: absolute;
  background: var(--orange);
}

.page-faq .q-plus::before {
  top: 50%;
  left: 0;
  width: 14px;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .q-plus::after {
  top: 0;
  left: 50%;
  width: 2px;
  height: 14px;
  transform: translateX(-50%);
}

.page-faq .qa[open] .q-plus {
  transform: rotate(45deg);
}

.page-faq .qa__body {
  margin-bottom: 4px;
  padding: 18px 18px 20px;
  background: var(--panel);
  color: var(--paper);
}

.page-faq .qa__body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
}

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

.page-faq .qa__body strong {
  color: var(--arc);
  font-weight: 600;
}

.page-faq .qa__body a {
  color: var(--arc);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* 曲线形态 */
.page-faq .curve-list {
  display: grid;
  gap: 14px;
  margin: 16px 0 0;
}

.page-faq .curve-list > div {
  padding-left: 14px;
  border-left: 2px solid var(--grid);
}

.page-faq .curve-list dt {
  margin-bottom: 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--arc);
}

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

/* 客服章节 */
.page-faq .faq-chapter--panel .faq-chapter__body {
  padding: 24px 20px;
  background: var(--panel);
  border-left: 3px solid var(--orange);
}

.page-faq .faq-chapter--panel .qa-list {
  border-bottom-color: var(--grid);
}

.page-faq .mail-link {
  font-family: var(--font-mono);
  font-size: 14px;
  word-break: break-all;
  color: var(--cyan) !important;
}

.page-faq .btn-row {
  margin-top: 22px;
}

/* 目录 */
.page-faq .faq-toc {
  order: -1;
  padding: 18px;
  border: 1px solid var(--grid);
  background: var(--ink);
}

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.page-faq .faq-toc ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc a {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 6px;
  padding: 8px 6px;
  color: var(--paper);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color 0.24s var(--ease), color 0.24s var(--ease);
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  border-left-color: var(--orange);
}

.page-faq .toc-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--arc);
  padding-top: 2px;
}

.page-faq .toc-label {
  font-size: 13.5px;
  line-height: 1.5;
}

.page-faq .toc-label em {
  display: block;
  margin-top: 2px;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* 响应式 */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding-block: 56px 76px;
  }

  .page-faq .step-bar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .qa__body {
    padding: 20px 24px 24px 58px;
  }

  .page-faq .faq-chapter--light {
    padding: 36px 32px 40px;
  }

  .page-faq .faq-chapter--panel .faq-chapter__body {
    padding: 32px 32px 34px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-chapter {
    grid-template-columns: var(--faq-num-col) minmax(0, 1fr);
    gap: 24px;
    padding-block: 60px;
  }

  .page-faq .faq-chapter:first-child {
    padding-top: 0;
  }

  .page-faq .faq-chapter__num {
    position: sticky;
    top: 100px;
  }

  .page-faq .faq-chapter__num .chapter-num {
    font-size: 64px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-toc {
    order: 0;
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-toc ol {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .q-plus,
  .page-faq .q-text,
  .page-faq .faq-toc a {
    transition: none;
  }
}