/* ==========================================================
   答疑中心 · 页面专属样式
   作用域：.page-faq
   ========================================================== */

.page-faq {
  overflow-x: clip;
  --faq-indent: 1.15rem;
}

.page-faq .breadcrumb {
  padding-top: 1.35rem;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-top: 1.25rem;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding: 1.75rem 1.25rem;
  border: 1px solid var(--track);
  border-radius: var(--radius);
  background:
    radial-gradient(72% 130% at 4% 0%, rgba(139, 92, 246, 0.24), transparent 62%),
    radial-gradient(62% 120% at 96% 4%, rgba(0, 229, 212, 0.16), transparent 60%),
    var(--panel);
  overflow: hidden;
}

.page-faq .faq-hero__title {
  margin: 0.55rem 0 0;
  font-size: clamp(2rem, 8.4vw, 3.5rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin-top: 1rem;
  max-width: 48ch;
  color: var(--paper);
  opacity: 0.82;
  font-size: 1rem;
  line-height: 1.9;
}

.page-faq .faq-hero__plaque {
  align-self: start;
  justify-self: start;
  display: grid;
  gap: 0.3rem;
  min-width: 190px;
}

.page-faq .faq-hero__plaque .stat__num {
  font-family: var(--font-mono);
  font-size: 2.6rem;
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__plaque .stat__label {
  font-size: 0.85rem;
  color: var(--ink);
  opacity: 0.72;
}

.page-faq .faq-hero__plaque-note {
  margin: 0.5rem 0 0;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--ink);
  opacity: 0.66;
}

/* ---------- 问题索引带 ---------- */

.page-faq .faq-index {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.6rem;
  margin-top: 1.35rem;
}

.page-faq .faq-index__item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.9rem 0.95rem;
  border: 1px solid var(--track);
  border-radius: var(--radius-s);
  background: var(--panel);
  color: var(--paper);
  text-decoration: none;
  transition: transform 320ms var(--ease), border-color 320ms var(--ease),
    background-color 320ms var(--ease);
}

.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  transform: translateY(-4px);
  border-color: var(--cyan);
  background: var(--night);
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-index__name {
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
}

/* ---------- 斜向分区过渡 ---------- */

.page-faq .faq-slant {
  height: 44px;
  margin-block: 0.5rem;
  background: linear-gradient(100deg, var(--night), rgba(27, 31, 59, 0.35));
  transform: skewY(-3deg);
}

/* ---------- 问答条目 ---------- */

.page-faq .qa-list {
  display: grid;
  gap: 0.8rem;
}

.page-faq .qa {
  position: relative;
  padding-left: var(--faq-indent);
  border: 1px solid var(--track);
  border-radius: var(--radius-s);
  background: var(--panel);
  transition: border-color 300ms var(--ease), transform 300ms var(--ease);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  border-radius: 2px 0 0 2px;
  background: linear-gradient(180deg, var(--cyan), var(--violet));
  opacity: 0.4;
  transition: opacity 300ms var(--ease);
}

.page-faq .qa[open]::before,
.page-faq .qa:hover::before {
  opacity: 1;
}

.page-faq .qa:hover {
  border-color: var(--cyan);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 1.05rem 1.1rem 1.05rem 0.85rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
  transition: color 240ms var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--cyan);
  line-height: 1;
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
}

.page-faq .qa__no {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-faq .qa__text {
  flex: 1 1 auto;
}

.page-faq .qa__a {
  padding: 0 1.25rem 1.25rem 0.85rem;
}

.page-faq .qa__a p {
  margin: 0 0 0.55rem;
  font-size: 0.95rem;
  line-height: 1.88;
  color: var(--paper);
  opacity: 0.8;
}

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

.page-faq .qa__link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 212, 0.45);
}

.page-faq .qa__link:hover,
.page-faq .qa__link:focus-visible {
  border-bottom-color: var(--cyan);
}

/* ---------- 图片与路径图 ---------- */

.page-faq .faq-figure {
  margin: 1.6rem 0 0;
}

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

.page-faq .faq-path-wrap {
  margin-top: 1.6rem;
  padding: 1.25rem 1rem 0.75rem;
  border: 1px solid var(--track);
  border-radius: var(--radius-s);
  background: var(--ink);
}

.page-faq .faq-path-label {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-faq .faq-path {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.page-faq .faq-path__track {
  stroke: var(--track);
  stroke-width: 2;
  stroke-dasharray: 6 8;
}

.page-faq .faq-path__node circle {
  fill: var(--panel);
  stroke: var(--cyan);
  stroke-width: 2;
  transition: fill 300ms var(--ease);
}

.page-faq .faq-path__node:hover circle,
.page-faq .faq-path__node:focus-within circle {
  fill: var(--cyan);
}

.page-faq .faq-path__name {
  fill: var(--paper);
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
}

.page-faq .faq-path__hint {
  fill: var(--signal);
  font-family: var(--font-mono);
  font-size: 11.5px;
}

/* ---------- 人工通道 ---------- */

.page-faq .faq-support {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-faq .faq-support__card {
  padding: 0;
}

.page-faq .faq-support__card--accent {
  border-color: rgba(0, 229, 212, 0.4);
  background:
    radial-gradient(90% 130% at 100% 0%, rgba(0, 229, 212, 0.14), transparent 62%),
    var(--panel);
}

.page-faq .faq-support__list {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-support__list li {
  position: relative;
  padding-left: 1.35rem;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.84;
}

.page-faq .faq-support__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 212, 0.14);
}

.page-faq .faq-support__lead {
  margin: 0.75rem 0 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.8;
}

.page-faq .faq-support__line {
  margin: 0.6rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-support__link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 212, 0.45);
}

.page-faq .faq-support__link:hover,
.page-faq .faq-support__link:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-support__card .btn {
  margin-top: 1.15rem;
}

.page-faq .faq-links {
  margin-top: 1.75rem;
  padding-top: 1.35rem;
  border-top: 1px solid var(--track);
}

.page-faq .faq-links__title {
  margin: 0 0 0.85rem;
  font-size: 0.92rem;
  color: var(--signal);
}

.page-faq .faq-links .tag {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-hero__grid {
    padding: 2.25rem 1.9rem;
  }

  .page-faq .faq-path-wrap {
    padding: 1.5rem 1.5rem 1rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: 1.75rem;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(220px, 0.75fr);
    align-items: start;
    gap: 2.5rem;
    padding: 3rem 2.75rem;
  }

  .page-faq .faq-index {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 0.7rem;
    margin-top: 1.6rem;
  }

  .page-faq .faq-support {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .page-faq .qa-list {
    gap: 0.9rem;
  }

  .page-faq .faq-figure {
    margin-top: 2rem;
  }

  .page-faq .faq-slant {
    height: 58px;
    margin-block: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__item,
  .page-faq .qa,
  .page-faq .qa::before,
  .page-faq .faq-path__node circle {
    transition: none;
  }

  .page-faq .faq-index__item:hover,
  .page-faq .faq-index__item:focus-visible {
    transform: none;
  }
}
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