/* ========== 页面：问答中心 /questions/ ========== */
.page-faq {
  background: var(--c-deep);
  color: var(--c-text);
  overflow-x: hidden;
}

/* ========== 首屏与标题区 ========== */
.page-faq .faq-hero {
  position: relative;
  padding: 96px 0 56px;
  background:
    linear-gradient(135deg, rgba(255, 107, 53, 0.16) 0%, transparent 42%),
    linear-gradient(180deg, var(--c-ink) 0%, var(--c-deep) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), 0 100%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: 48px;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, var(--c-accent), var(--c-orange-soft));
  clip-path: polygon(20% 0, 100% 0, 100% 80%, 80% 100%, 0 100%, 0 20%);
  opacity: 0.22;
  z-index: 1;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
}

.page-faq .c-breadcrumb {
  color: var(--c-subtle);
  margin-bottom: 24px;
  font-size: 0.85rem;
}

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

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

.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-orange-soft);
  display: flex;
  align-items: center;
  gap: 0;
}

.page-faq .faq-kicker span {
  color: var(--c-accent);
  margin: 0 6px;
}

.page-faq .faq-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 5vw, 3.4rem);
  line-height: 1.08;
  color: var(--c-text);
  letter-spacing: 0.01em;
  max-width: 900px;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 640px;
  font-size: 1rem;
  line-height: 1.8;
  color: #c9bede;
}

/* ========== 主体壳层 ========== */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 32px 16px 56px;
}

/* ========== 左侧问题索引 ========== */
.page-faq .faq-index {
  background: linear-gradient(160deg, var(--c-panel), rgba(58, 33, 104, 0.8));
  border-left: 3px solid var(--c-accent);
  padding: 20px 16px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-teal);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.page-faq .faq-index__list li {
  margin: 0;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 4px;
  color: var(--c-text);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  border-bottom: 1px solid rgba(106, 76, 158, 0.35);
  transition: color var(--ease), padding-left var(--ease);
}

.page-faq .faq-index__list a::before {
  content: "";
  width: 7px;
  height: 7px;
  background: var(--c-subtle);
  flex: none;
  transition: background var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus {
  color: var(--c-accent);
  padding-left: 8px;
}

.page-faq .faq-index__list a:hover::before,
.page-faq .faq-index__list a:focus::before {
  background: var(--c-accent);
}

.page-faq .faq-index__btn {
  display: flex;
  width: 100%;
  justify-content: center;
  box-sizing: border-box;
}

/* ========== 分区标题 ========== */
.page-faq .faq-section {
  margin-bottom: 52px;
}

.page-faq .faq-section:target {
  border-left: 3px solid var(--c-accent);
  padding-left: 12px;
}

.page-faq .faq-section__head {
  position: relative;
  padding-left: 14px;
  border-left: 3px solid var(--c-accent);
  margin-bottom: 18px;
}

.page-faq .faq-section__index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--c-teal);
}

.page-faq .faq-section__head h2 {
  margin: 4px 0 6px;
  font-family: var(--font-head);
  font-size: 1.55rem;
  color: var(--c-text);
  text-transform: uppercase;
}

.page-faq .faq-section__head p {
  margin: 0;
  color: var(--c-subtle);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ========== 手风琴条目 ========== */
.page-faq .faq-item {
  margin-bottom: 12px;
}

.page-faq .faq-details {
  background: rgba(58, 33, 104, 0.45);
  border: 1px solid rgba(106, 76, 158, 0.35);
  border-left: 3px solid var(--c-subtle);
  transition: background var(--ease), border-color var(--ease);
}

.page-faq .faq-details[open] {
  background: var(--c-panel);
  border-left-color: var(--c-accent);
}

.page-faq .faq-details summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 14px;
  cursor: pointer;
}

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

.page-faq .faq-details summary:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: -2px;
}

.page-faq .faq-q__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--c-accent);
  background: rgba(255, 107, 53, 0.12);
  padding: 4px 7px;
  white-space: nowrap;
  border-left: 2px solid var(--c-accent);
}

.page-faq .faq-q__title {
  flex: 1;
  font-weight: 700;
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--c-text);
}

.page-faq .faq-q__icon {
  position: relative;
  width: 24px;
  height: 24px;
  flex: none;
}

.page-faq .faq-q__icon::before,
.page-faq .faq-q__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--c-teal);
  transition: transform var(--ease), opacity var(--ease), background var(--ease);
}

.page-faq .faq-q__icon::before {
  width: 14px;
  height: 2px;
}

.page-faq .faq-q__icon::after {
  width: 2px;
  height: 14px;
}

.page-faq .faq-details[open] .faq-q__icon::after {
  opacity: 0;
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-details[open] .faq-q__icon::before {
  background: var(--c-accent);
}

/* ========== 答案区 ========== */
.page-faq .faq-a {
  padding: 14px 14px 18px;
  border-top: 1px dashed rgba(106, 76, 158, 0.5);
}

.page-faq .faq-a p {
  margin: 0 0 10px;
  font-size: 0.94rem;
  line-height: 1.8;
  color: #d9cfe8;
}

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

.page-faq .faq-a__figure {
  margin: 14px 0 0;
}

.page-faq .faq-a__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.page-faq .faq-figure--nav img {
  aspect-ratio: 600 / 350;
}

.page-faq .faq-figure--timeline img {
  aspect-ratio: 600 / 300;
}

.page-faq .faq-a__figure figcaption {
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--c-subtle);
  font-family: var(--font-mono);
}

.page-faq .faq-a__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
  align-items: center;
}

/* ========== 工具清单 ========== */
.page-faq .faq-tool-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-tool-list li {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 10px;
  background: rgba(0, 201, 167, 0.12);
  border: 1px solid rgba(0, 201, 167, 0.4);
  color: var(--c-teal);
}

/* ========== 联系信息清单 ========== */
.page-faq .faq-contact-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq .faq-contact-list li {
  padding: 7px 0;
  font-size: 0.9rem;
  color: #e6dcf2;
  border-bottom: 1px dashed rgba(106, 76, 158, 0.4);
  font-family: var(--font-mono);
  word-break: break-all;
}

.page-faq .faq-contact-list li:first-child {
  border-top: 1px dashed rgba(106, 76, 158, 0.4);
}

/* ========== 数据条 ========== */
.page-faq .faq-stats {
  background: linear-gradient(90deg, var(--c-ink), var(--c-deep), var(--c-ink));
  border-top: 1px solid rgba(106, 76, 158, 0.45);
  border-bottom: 1px solid rgba(106, 76, 158, 0.45);
  padding: 30px 16px;
}

.page-faq .faq-stats__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.page-faq .faq-stats .c-metric {
  text-align: center;
}

.page-faq .faq-stats .c-metric__value {
  font-size: 1.7rem;
  color: var(--c-accent);
  font-family: var(--font-mono);
  display: block;
}

.page-faq .c-metric__value small {
  font-size: 0.45em;
  font-weight: 400;
  color: var(--c-teal);
  margin-left: 2px;
}

.page-faq .faq-stats .c-metric__label {
  font-size: 0.78rem;
  display: block;
  margin-top: 4px;
  color: var(--c-subtle);
}

/* ========== 底部引导 ========== */
.page-faq .faq-cta {
  position: relative;
  isolation: isolate;
  padding: 44px 16px 48px;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.18), transparent 40%), var(--c-ink);
  border-top: 1px solid rgba(106, 76, 158, 0.45);
  border-bottom: 1px solid rgba(106, 76, 158, 0.45);
}

.page-faq .faq-cta::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  height: 100%;
  width: 90px;
  background: repeating-linear-gradient(-45deg, rgba(255, 107, 53, 0.5) 0 2px, transparent 2px 8px);
  opacity: 0.2;
  z-index: 0;
}

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

.page-faq .faq-cta h2 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 1.7rem;
  color: var(--c-text);
  text-transform: uppercase;
}

.page-faq .faq-cta p {
  margin: 0 0 18px;
  color: #c9bede;
  line-height: 1.7;
  max-width: 600px;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ========== 桌面端 ========== */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    padding: 120px 0 72px;
  }

  .page-faq .faq-hero__title {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
  }

  .page-faq .faq-shell {
    grid-template-columns: 230px minmax(0, 1fr);
    gap: 40px;
    padding: 40px 24px 80px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    align-self: start;
    padding: 24px 18px;
  }

  .page-faq .faq-section__head h2 {
    font-size: 1.8rem;
  }

  .page-faq .faq-q__title {
    font-size: 1.05rem;
  }

  .page-faq .faq-a p {
    font-size: 1rem;
  }

  .page-faq .faq-stats {
    padding: 36px 24px;
  }

  .page-faq .faq-stats__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .page-faq .faq-stats .c-metric__value {
    font-size: 2rem;
  }

  .page-faq .faq-cta {
    padding: 56px 24px 64px;
  }
}