/* ===== 问答中心 page-faq ===== */
.page-faq {
  --faq-line: rgba(245, 247, 250, 0.12);
  --faq-line-gold: rgba(242, 201, 76, 0.24);
  background: var(--color-deep);
  color: var(--color-white);
  overflow-x: hidden;
  font-family: var(--font-body);
}

/* ---------- 顶部横幅 ---------- */
.faq-hero {
  position: relative;
  padding: calc(var(--header-height) + 40px) 0 0;
  background:
    radial-gradient(ellipse at 78% 18%, rgba(155, 93, 229, 0.30) 0%, transparent 50%),
    radial-gradient(ellipse at 12% 78%, rgba(242, 201, 76, 0.12) 0%, transparent 45%),
    linear-gradient(155deg, var(--color-deep) 0%, var(--color-mid) 58%, rgba(20, 27, 60, 0.95) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 32px), 0 100%);
}

.breadcrumbs {
  margin-bottom: 28px;
}

.faq-hero__layout {
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding: 32px 0 36px;
}

.faq-hero__content {
  max-width: 940px;
}

.faq-hero__tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--color-gold);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.faq-hero__tagline::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gradient-gold);
  display: inline-block;
}

.faq-hero__title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 46px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

.faq-hero__lead {
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-gray);
  max-width: 720px;
  margin: 0;
}

.faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
  padding: 0;
}

.faq-hero__quick > div {
  border: 1px solid var(--faq-line-gold);
  background: rgba(26, 37, 80, 0.6);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 132px;
  backdrop-filter: blur(4px);
}

.faq-hero__quick dt {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gray);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.faq-hero__quick dd {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 18px;
  color: var(--color-white);
  margin: 0;
}

.faq-hero__quick dd .faq-data {
  color: var(--color-cyan);
  font-size: 18px;
}

.faq-hero__visual {
  height: 220px;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 36px), 0 100%);
}

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

/* ---------- 分类索引 ---------- */
.faq-index {
  padding: 0 0 24px;
}

.faq-index__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: -26px;
  position: relative;
  z-index: 2;
}

.faq-index__card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 22px;
  background: var(--color-mid);
  border: 1px solid rgba(245, 247, 250, 0.08);
  text-decoration: none;
  color: var(--color-white);
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}

.faq-index__card:hover {
  transform: translateY(-3px);
  border-color: var(--faq-line-gold);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
}

.faq-index__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-gold);
  margin-bottom: 8px;
}

.faq-index__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 17px;
}

.faq-index__desc {
  font-size: 13px;
  color: var(--color-gray);
}

/* ---------- 章节通用 ---------- */
.faq-section {
  padding: 56px 0;
}

.faq-section--alt {
  background:
    radial-gradient(ellipse at 85% 15%, rgba(155, 93, 229, 0.16) 0%, transparent 48%),
    linear-gradient(180deg, var(--color-deep) 0%, rgba(16, 26, 61, 0.72) 100%);
  border-top: 1px solid var(--faq-line-gold);
  border-bottom: 1px solid var(--faq-line-gold);
}

.faq-section--last {
  padding-bottom: 72px;
}

.faq-section__header {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.faq-section__meta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.faq-section__index {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--color-cyan);
}

.faq-section__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray);
}

.faq-section__title {
  font-family: var(--font-head);
  font-size: clamp(24px, 3.4vw, 34px);
  margin: 4px 0 0;
  letter-spacing: -0.01em;
}

.faq-section__desc {
  color: var(--color-gray);
  line-height: 1.8;
  max-width: 660px;
  margin: 0;
}

.faq-section__actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 手风琴 ---------- */
.faq-accordion {
  margin-top: 32px;
  border-top: 1px solid var(--faq-line);
}

.faq-accordion__item {
  border-bottom: 1px solid var(--faq-line);
  transition: background 0.3s ease;
}

.faq-accordion__item[open] {
  background: linear-gradient(90deg, rgba(155, 93, 229, 0.06) 0%, rgba(26, 37, 80, 0.30) 100%);
}

.faq-accordion__question {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 12px 20px 16px;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 16px;
  color: var(--color-white);
  transition: color 0.25s ease;
}

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

.faq-accordion__question::marker {
  content: "";
}

.faq-accordion__question:hover {
  color: var(--color-gold);
}

.faq-accordion__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-cyan);
  min-width: 34px;
}

.faq-accordion__text {
  flex: 1;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 16px;
  color: inherit;
}

.faq-accordion__icon {
  position: relative;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.faq-accordion__icon::before,
.faq-accordion__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 15px;
  height: 1.5px;
  background: var(--color-gold);
  transition: transform 0.3s ease;
  transform: translate(-50%, -50%);
}

.faq-accordion__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-accordion__item[open] .faq-accordion__icon::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.faq-accordion__item[open] .faq-accordion__icon::after {
  transform: translate(-50%, -50%) rotate(135deg);
}

.faq-accordion__answer {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.35s ease;
}

.faq-accordion__item[open] .faq-accordion__answer {
  grid-template-rows: 1fr;
  opacity: 1;
}

.faq-accordion__answer-inner {
  overflow: hidden;
  padding: 0 16px 24px;
}

.faq-accordion__answer-inner p {
  margin: 0 0 10px;
  color: var(--color-gray);
  font-size: 15px;
  line-height: 1.85;
  max-width: 720px;
}

.faq-accordion__more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gold);
  text-decoration: none;
  letter-spacing: 0.04em;
  padding: 4px 0;
  transition: color 0.2s ease;
}

.faq-accordion__more:hover {
  color: var(--color-white);
}

/* ---------- 反馈与联系 ---------- */
.faq-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 32px;
}

.faq-contact__card {
  background: linear-gradient(160deg, rgba(26, 37, 80, 0.85) 0%, rgba(10, 14, 39, 0.95) 100%);
  border: 1px solid var(--faq-line-gold);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.faq-contact__heading {
  font-family: var(--font-head);
  font-size: 20px;
  margin: 0;
}

.faq-contact__text {
  color: var(--color-gray);
  line-height: 1.75;
  margin: 0;
  font-size: 14px;
}

.faq-contact__list {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-contact__item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 8px;
}

.faq-contact__item dt {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-gold);
}

.faq-contact__item dd {
  margin: 0;
  font-size: 14px;
  color: var(--color-white);
  font-family: var(--font-body);
  line-height: 1.6;
  word-break: break-word;
}

.faq-contact__visual {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(245, 247, 250, 0.08);
  background: rgba(26, 37, 80, 0.4);
}

.faq-contact__visual img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  max-height: 420px;
  object-fit: cover;
  display: block;
}

/* ---------- 信任条 ---------- */
.faq-trust {
  margin-top: 32px;
  border: 1px solid rgba(0, 245, 212, 0.2);
  background: rgba(0, 245, 212, 0.04);
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.faq-trust__title {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.faq-trust p {
  margin: 0;
  color: var(--color-gray);
  line-height: 1.75;
  font-size: 14px;
}

/* ---------- 数据高亮 ---------- */
.faq-data {
  font-family: var(--font-mono);
  color: var(--color-cyan);
  font-weight: 500;
  font-size: 1.05em;
  letter-spacing: 0.01em;
}

/* ---------- 平板与桌面适配 ---------- */
@media (min-width: 640px) {
  .faq-accordion__answer-inner {
    padding-left: 66px;
  }
}

@media (min-width: 768px) {
  .faq-hero {
    padding-top: calc(var(--header-height) + 64px);
  }

  .faq-hero__layout {
    flex-direction: row;
    align-items: flex-end;
    gap: 36px;
  }

  .faq-hero__content {
    flex: 1;
  }

  .faq-hero__quick {
    flex-shrink: 0;
  }

  .faq-hero__visual {
    height: 320px;
  }

  .faq-index__grid {
    grid-template-columns: repeat(2, 1fr);
    margin-top: -32px;
  }

  .faq-section {
    padding: 72px 0;
  }

  .faq-section__header {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px 20px;
    align-items: baseline;
  }

  .faq-section__desc {
    width: 100%;
  }

  .faq-question__text {
    font-size: 17px;
  }

  .faq-contact__grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: stretch;
  }

  .faq-contact__visual {
    min-height: 320px;
  }
}

@media (min-width: 1024px) {
  .faq-index__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .faq-hero__visual {
    height: 380px;
  }

  .faq-accordion__question {
    padding: 24px 20px;
  }

  .faq-accordion__answer-inner {
    padding-left: 76px;
  }

  .faq-contact__card {
    padding: 34px 32px;
  }
}