/* ===== 帮助中心页 · page-faq ===== */

.page-faq {
  --faq-accent: var(--neon);
  --faq-accent-soft: rgba(0, 255, 136, 0.12);
  --faq-card-pad: 20px;
  background:
    radial-gradient(ellipse at 88% 4%, rgba(0, 255, 136, 0.07), transparent 360px),
    radial-gradient(ellipse at 6% 46%, rgba(255, 107, 0, 0.05), transparent 320px);
}

/* 面包屑 */
.page-faq .faq-crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--gray);
  margin-bottom: 18px;
}
.page-faq .faq-crumbs a {
  color: var(--gray);
  text-decoration: none;
  transition: color 300ms ease;
}
.page-faq .faq-crumbs a:hover {
  color: var(--neon);
}
.page-faq .faq-crumbs-sep {
  color: var(--gray-dim);
}

/* 页头 */
.page-faq .faq-hero {
  position: relative;
  padding: 40px 0 36px;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 72px;
  height: 4px;
  background: var(--neon);
  border-radius: 0 2px 2px 0;
  box-shadow: 0 0 16px rgba(0, 255, 136, 0.5);
}
.page-faq .faq-hero-kicker {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--neon);
  text-transform: uppercase;
  margin: 0 0 10px;
}
.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: 44px;
  line-height: 1.05;
  color: var(--white);
  margin: 0 0 14px;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}
.page-faq .faq-hero-sub {
  max-width: 720px;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
  color: var(--gray);
  margin: 0;
}

/* 搜索区 */
.page-faq .faq-search-zone {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-search-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
}
.page-faq .faq-search-zone::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, var(--bg-deep) 0%, rgba(11, 15, 25, 0.72) 42%, rgba(11, 15, 25, 0.84) 100%);
}
.page-faq .faq-search-inner {
  position: relative;
  z-index: 2;
  padding: 44px 20px;
  max-width: 680px;
  margin: 0 auto;
  text-align: left;
}
.page-faq .faq-search-inner h2 {
  font-family: var(--font-display);
  font-size: 26px;
  color: var(--white);
  margin: 0 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.page-faq .faq-search-panel {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  width: 100%;
  height: 54px;
  padding: 0 18px;
  background: var(--bg-card);
  border: 1px solid var(--line-bright);
  border-radius: 999px;
  transition: border-color 300ms ease, box-shadow 300ms ease;
  box-sizing: border-box;
}
.page-faq .faq-search-panel:focus-within {
  border-color: var(--neon);
  box-shadow: 0 0 0 4px var(--faq-accent-soft);
}
.page-faq .faq-search-panel .search-ico {
  display: grid;
  place-items: center;
  color: var(--neon);
  flex-shrink: 0;
}
.page-faq .faq-search-panel .search-input {
  flex: 1;
  min-width: 0;
  height: 100%;
  border: 0;
  outline: none;
  background: transparent;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 14px;
}
.page-faq .faq-search-panel .search-input::placeholder {
  color: var(--gray-dim);
}
.page-faq .faq-search-hint {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--gray);
  margin: 14px 0 0;
}

/* 两栏容器 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  padding-top: 48px;
  padding-bottom: 56px;
}

/* 分类树 */
.page-faq .faq-cats {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px;
  align-self: start;
  overflow: hidden;
}
.page-faq .faq-cats::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--neon), transparent 72%);
}
.page-faq .faq-cats-title {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--white);
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.page-faq .faq-cats-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .faq-cats-list li {
  border-top: 1px solid var(--line);
}
.page-faq .faq-cats-list li:first-child {
  border-top: 0;
}
.page-faq .faq-cats-list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 4px;
  color: var(--gray);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 14px;
  transition: color 300ms ease, margin-left 300ms ease;
}
.page-faq .faq-cats-list a:hover {
  color: var(--neon);
  margin-left: 4px;
}
.page-faq .faq-cat-idx {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--orange);
  min-width: 20px;
}
.page-faq .faq-cats-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--gray-dim);
}
.page-faq .faq-cats-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 10px rgba(0, 255, 136, 0.7);
  animation: faq-breathe 2.4s ease-in-out infinite;
}

@keyframes faq-breathe {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.82); }
}

/* 问题列表列 */
.page-faq .faq-list-col {
  display: flex;
  flex-direction: column;
  gap: 44px;
  min-width: 0;
}

/* 问题分组 */
.page-faq .faq-group-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}
.page-faq .faq-group-idx {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--orange);
  line-height: 1;
}
.page-faq .faq-group-head h2 {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--white);
  margin: 0 0 2px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.page-faq .faq-group-head p {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--gray-dim);
  margin: 0;
}

/* 手风琴条目 */
.page-faq .faq-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 300ms ease, background 300ms ease;
}
.page-faq .faq-item:hover {
  border-color: var(--line-bright);
}
.page-faq .faq-item:has(.faq-toggle:checked) {
  border-color: var(--neon);
  background: var(--bg-elev);
}
.page-faq .faq-toggle {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}
.page-faq .faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px var(--faq-card-pad);
  cursor: pointer;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  user-select: none;
  transition: color 300ms ease;
}
.page-faq .faq-toggle:checked ~ .faq-q {
  color: var(--neon);
}
.page-faq .faq-toggle:focus-visible ~ .faq-q {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
}
.page-faq .faq-q-icon {
  position: relative;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line-bright);
  border-radius: 50%;
  transition: border-color 300ms ease, background 300ms ease;
}
.page-faq .faq-q-icon::before,
.page-faq .faq-q-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--gray);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: background 300ms ease, height 300ms ease;
}
.page-faq .faq-q-icon::before {
  width: 11px;
  height: 2px;
}
.page-faq .faq-q-icon::after {
  width: 2px;
  height: 11px;
}
.page-faq .faq-toggle:checked ~ .faq-q .faq-q-icon {
  border-color: var(--neon);
  background: var(--faq-accent-soft);
}
.page-faq .faq-toggle:checked ~ .faq-q .faq-q-icon::before,
.page-faq .faq-toggle:checked ~ .faq-q .faq-q-icon::after {
  background: var(--neon);
}
.page-faq .faq-toggle:checked ~ .faq-q .faq-q-icon::after {
  height: 0;
}
.page-faq .faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 380ms cubic-bezier(0.22, 1, 0.36, 1);
}
.page-faq .faq-a-inner {
  overflow: hidden;
  min-height: 0;
}
.page-faq .faq-a-inner p {
  margin: 0;
  padding: 0 var(--faq-card-pad) 20px;
  color: var(--gray);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
}
.page-faq .faq-a-inner a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px dashed rgba(0, 255, 136, 0.45);
}
.page-faq .faq-toggle:checked ~ .faq-a {
  grid-template-rows: 1fr;
}

/* 高频问题 */
.page-faq .faq-hot {
  padding: 56px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 255, 136, 0.035) 100%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hot .section-head {
  margin-bottom: 28px;
}
.page-faq .faq-hot .section-title {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--white);
  margin: 4px 0 0;
}
.page-faq .faq-hot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}
.page-faq .faq-hot-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px 20px 20px;
  overflow: hidden;
  transition: transform 300ms ease, border-color 300ms ease;
}
.page-faq .faq-hot-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--orange), transparent 70%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 400ms ease;
}
.page-faq .faq-hot-card:hover {
  transform: translateY(-4px);
  border-color: var(--orange);
}
.page-faq .faq-hot-card:hover::before {
  transform: scaleX(1);
}
.page-faq .faq-hot-num {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 10px;
}
.page-faq .faq-hot-card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--white);
  margin: 0 0 8px;
  line-height: 1.3;
}
.page-faq .faq-hot-card p {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--gray);
  line-height: 1.7;
  margin: 0;
}
.page-faq .faq-hot-card a {
  color: var(--neon);
  text-decoration: none;
}

/* 仍未解决 */
.page-faq .faq-unsolved {
  padding: 56px 0;
}
.page-faq .faq-unsolved-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}
.page-faq .faq-unsolved-content .section-kicker {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--neon);
  text-transform: uppercase;
}
.page-faq .faq-unsolved-content h2 {
  font-family: var(--font-display);
  font-size: 30px;
  color: var(--white);
  margin: 8px 0 12px;
}
.page-faq .faq-unsolved-content > p {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--gray);
  line-height: 1.8;
  max-width: 480px;
  margin: 0;
}
.page-faq .faq-unsolved-list {
  list-style: none;
  padding: 0;
  margin: 24px 0 28px;
  border-top: 1px solid var(--line);
}
.page-faq .faq-unsolved-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-body);
  font-size: 14px;
}
.page-faq .faq-u-label {
  color: var(--gray);
  flex-shrink: 0;
}
.page-faq .faq-u-value {
  color: var(--white);
  font-weight: 600;
  word-break: break-all;
  text-align: right;
}
.page-faq .faq-u-value a {
  color: var(--neon);
  text-decoration: none;
}
.page-faq .faq-unsolved-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  object-fit: cover;
}

/* 窄屏适配（移动端优先的基础样式之上补充小屏横竖屏过渡） */
@media (min-width: 480px) {
  .page-faq .faq-hot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-hot-card:last-child {
    grid-column: 1 / -1;
  }
}

/* 桌面断点 */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 48px;
  }
  .page-faq .faq-cats {
    position: sticky;
    top: 24px;
  }
  .page-faq .faq-search-inner {
    padding: 52px 24px;
  }
  .page-faq .faq-unsolved-content h2 {
    font-size: 34px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero {
    padding-top: 48px;
    padding-bottom: 40px;
  }
  .page-faq .faq-hero h1 {
    font-size: 52px;
  }
  .page-faq .faq-hero-sub {
    font-size: 15px;
  }
  .page-faq .faq-hot-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .page-faq .faq-hot-card:last-child {
    grid-column: auto;
  }
  .page-faq .faq-unsolved-inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
  }
  .page-faq .faq-unsolved-media img {
    aspect-ratio: 4 / 3;
  }
}