/* =====================================================
   FAQ 问答中心 · 页面专属样式
   作用域：.page-faq
   ===================================================== */

.page-faq ul,
.page-faq ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- Hero 深色横幅 ---------- */

.page-faq__hero {
  position: relative;
  overflow: hidden;
  padding-bottom: 72px;
  background:
    radial-gradient(circle at 78% 20%, rgba(255, 92, 0, 0.18), transparent 42%),
    radial-gradient(circle at 18% 88%, rgba(0, 85, 255, 0.22), transparent 55%),
    var(--color-dark);
}

.page-faq__hero .container {
  position: relative;
  z-index: 1;
}

.page-faq__hero-mark {
  position: absolute;
  right: 3%;
  top: 14%;
  z-index: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(150px, 22vw, 300px);
  line-height: 0.82;
  color: rgba(255, 212, 0, 0.07);
  pointer-events: none;
  user-select: none;
}

.page-faq__hero-kicker {
  margin: 32px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-yellow);
}

.page-faq__hero-title {
  margin: 8px 0 0;
  max-width: 12ch;
  font-size: clamp(1.9rem, 5.5vw, 3.4rem);
  line-height: 1.12;
}

.page-faq__hero-lead {
  margin: 20px 0 0;
  max-width: 68ch;
  color: rgba(255, 255, 255, 0.84);
}

.page-faq__hero-meta {
  display: inline-block;
  margin: 28px 0 0;
  padding: 8px 14px;
  border: 1px solid rgba(255, 212, 0, 0.5);
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: var(--color-yellow);
}

/* ---------- 章节通用 ---------- */

.page-faq__section {
  padding: 56px 0 52px;
}

.page-faq__section--alt {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

/* ---------- 热门问题 ---------- */

.page-faq__hot-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.page-faq__hot-visual {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq__hot-caption {
  max-width: 48ch;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--color-text-sub);
}

.page-faq__hot-list {
  display: flex;
  flex-direction: column;
}

.page-faq__hot-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0 18px;
  border-bottom: 1px solid var(--color-line);
}

.page-faq__hot-item:first-child {
  border-top: 1px solid var(--color-line);
}

.page-faq__details-badge {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin-top: 3px;
  padding: 6px;
  border-radius: 2px;
  background: var(--color-orange);
  color: #fff;
}

.page-faq__hot-body {
  flex: 1;
}

.page-faq__hot-q {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--color-text);
}

.page-faq__hot-a {
  margin: 8px 0 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--color-text-sub);
}

.page-faq__hot-more {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
  font-size: 0.94rem;
  color: var(--color-text-sub);
}

.page-faq__hot-more a {
  color: var(--color-blue);
  font-weight: 600;
  text-underline-offset: 3px;
}

/* ---------- 分类浏览：左侧目录 ---------- */

.page-faq__cat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}

.page-faq__cat-dir {
  padding: 22px 20px;
  background:
    linear-gradient(140deg, rgba(0, 85, 255, 0.16), transparent 55%),
    var(--color-dark);
  border-left: 6px solid var(--color-yellow);
}

.page-faq__dir-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  color: #fff;
}

.page-faq__dir-list {
  margin-top: 14px;
}

.page-faq__dir-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 4px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
}

.page-faq__dir-link span {
  font-size: 0.78rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: var(--color-yellow);
}

.page-faq__dir-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 8px;
  width: 22px;
  height: 3px;
  background: var(--color-yellow);
  transition: width 0.22s ease;
}

.page-faq__dir-link:hover::after {
  width: 48px;
}

.page-faq__dir-link:hover {
  color: #fff;
}

/* ---------- 分类浏览：手风琴列表 ---------- */

.page-faq__faq-main {
  display: flex;
  flex-direction: column;
}

.page-faq__group {
  padding-bottom: 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--color-line);
}

.page-faq__group:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq__group-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-text);
}

.page-faq__group-intro {
  margin: 6px 0 20px;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--color-text-sub);
}

.page-faq__details {
  padding: 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: transparent;
}

.page-faq__details + .page-faq__details {
  border-top: 0;
}

.page-faq__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 6px;
  cursor: pointer;
  list-style: none;
}

.page-faq__q::-webkit-details-marker,
.page-faq__q::marker {
  display: none;
  content: "";
}

.page-faq__q .page-faq__details-badge {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  padding: 4px;
}

.page-faq__q-text {
  flex: 1;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.5;
  color: var(--color-text);
}

.page-faq__q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.2rem;
  line-height: 1.5;
  color: var(--color-blue);
  transition: transform 0.25s ease, color 0.25s ease;
}

.page-faq__details[open] {
  padding-left: 8px;
  border-left: 4px solid var(--color-yellow);
  background: rgba(255, 212, 0, 0.03);
}

.page-faq__details[open] .page-faq__q::after {
  content: "−";
  color: var(--color-orange);
}

.page-faq__answer {
  padding: 0 8px 20px 38px;
}

.page-faq__answer p {
  max-width: 68ch;
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--color-text-sub);
}

.page-faq__answer a {
  color: var(--color-blue);
  font-weight: 600;
  text-underline-offset: 3px;
}

.page-faq__details[open] .page-faq__answer {
  animation: page-faq-fade 0.25s ease both;
}

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

/* ---------- 联系支持 ---------- */

.page-faq__support {
  padding: 64px 0;
  background:
    linear-gradient(120deg, rgba(183, 46, 111, 0.06), transparent 40%),
    var(--color-bg);
}

.page-faq__support-inner {
  display: grid;
  grid-template-columns: 1fr;
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-left: 8px solid var(--color-orange);
  box-shadow: 12px 12px 0 0 var(--color-bg-alt);
}

.page-faq__support-media {
  min-height: 200px;
}

.page-faq__support-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq__support-body {
  padding: 32px 24px 36px;
}

.page-faq__support-kicker {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-orange);
}

.page-faq__support-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-text);
}

.page-faq__support-lead {
  margin: 18px 0 24px;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--color-text-sub);
}

.page-faq__support-contacts {
  margin: 0 0 28px;
  padding: 20px 0 0;
  border-top: 2px solid var(--color-yellow);
}

.page-faq__support-contact {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
}

.page-faq__support-contact dt {
  flex: none;
  width: 92px;
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--color-text);
}

.page-faq__support-contact dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--color-text-sub);
}

.page-faq__support-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 180px;
}

/* ---------- 桌面端布局 ---------- */

@media (min-width: 48rem) {

  .page-faq__hero {
    padding-bottom: 88px;
  }

  .page-faq__hot-grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
  }

  .page-faq__hot-visual {
    position: sticky;
    top: 100px;
  }

  .page-faq__cat-grid {
    grid-template-columns: 3fr 9fr;
    gap: 48px;
  }

  .page-faq__cat-dir {
    position: sticky;
    top: 96px;
  }

  .page-faq__support-inner {
    grid-template-columns: 5fr 7fr;
  }

  .page-faq__support-body {
    padding: 48px 44px;
  }
}