/* ============ 问答中心 page-faq ============ */
.page-faq {
  --faq-rail: 248px;
  display: block;
  color: var(--ink);
  overflow-x: clip;
}

.page-faq .faq-crumb {
  padding-top: 22px;
  padding-bottom: 6px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  margin-top: 10px;
  padding: clamp(30px, 5vw, 56px) 0 clamp(34px, 5vw, 60px);
  background:
    radial-gradient(760px 380px at 92% 4%, rgba(255, 106, 19, .18), transparent 62%),
    radial-gradient(640px 340px at 0% 98%, rgba(20, 210, 160, .12), transparent 62%),
    var(--navy);
  border-top: var(--line);
  border-bottom: var(--line);
  overflow: hidden;
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  align-items: center;
}

.page-faq .faq-hero-copy {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.page-faq .faq-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  margin: 0;
  padding: 6px 14px;
  border: var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mint);
}

.page-faq .faq-title {
  margin: 0;
  font-size: clamp(30px, 5.4vw, 54px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.02em;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15.5px, 1.7vw, 17px);
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 0;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-fact {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-right: 24px;
  margin-right: 24px;
  border-right: var(--line);
}

.page-faq .faq-fact:last-child {
  border-right: 0;
  padding-right: 0;
  margin-right: 0;
}

.page-faq .faq-fact-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--orange);
  line-height: 1;
}

.page-faq .faq-fact-label {
  font-size: 13.5px;
  color: var(--muted);
}

.page-faq .faq-hero-visual {
  position: relative;
  padding: 16px;
  border: var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(16, 38, 63, .92), rgba(8, 24, 43, .55));
  box-shadow: var(--shadow-float);
  min-width: 0;
}

.page-faq .faq-svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-flow {
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 8 10;
  animation: faq-flow 6s linear infinite;
}

.page-faq .faq-flow--slow {
  animation-duration: 9s;
}

@keyframes faq-flow {
  to { stroke-dashoffset: -72; }
}

/* ---------- 主布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  padding-top: clamp(30px, 4.5vw, 52px);
  padding-bottom: clamp(40px, 5vw, 72px);
  align-items: start;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-side {
  border: var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 16px 14px;
  min-width: 0;
}

.page-faq .faq-side-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index-link {
  display: block;
  padding: 9px 12px 9px 14px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  transition: color .16s ease, border-color .16s ease, background .16s ease;
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--ink);
  border-left-color: var(--orange);
  background: rgba(255, 106, 19, .08);
}

/* ---------- 筛选 ---------- */
.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
}

.page-faq .filter-btn {
  font: inherit;
  font-size: 14px;
  padding: 8px 16px;
  border: var(--line);
  border-radius: 999px;
  background: rgba(16, 38, 63, .72);
  color: var(--muted);
  cursor: pointer;
  transition: color .16s ease, border-color .16s ease, background .16s ease;
}

.page-faq .filter-btn:hover,
.page-faq .filter-btn:focus-visible {
  color: var(--ink);
  border-color: var(--orange);
}

.page-faq .filter-btn.is-active,
.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--navy);
  font-weight: 700;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.page-faq .faq-item {
  border: var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  scroll-margin-top: 96px;
  transition: border-color .16s ease;
}

.page-faq .faq-item:hover,
.page-faq .faq-item:focus-within {
  border-color: rgba(255, 106, 19, .5);
}

.page-faq .faq-item[open] {
  border-color: rgba(255, 106, 19, .55);
}

.page-faq .faq-item.is-filtered-out {
  display: none;
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  transition: background .16s ease;
}

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

.page-faq .faq-q:hover {
  background: rgba(255, 106, 19, .05);
}

.page-faq .faq-q::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--orange);
  padding-top: 2px;
}

.page-faq .faq-item[open] .faq-q::after {
  content: "−";
}

.page-faq .faq-q-num {
  flex: none;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--electro);
}

.page-faq .faq-q-text {
  margin: 0;
  font-size: clamp(16px, 2vw, 18px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .faq-a {
  padding: 16px 20px 22px 54px;
  border-top: var(--line);
}

.page-faq .faq-a p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-a p.faq-lead {
  margin-bottom: 16px;
  padding-left: 14px;
  border-left: 3px solid var(--orange);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-a a {
  color: var(--electro);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--orange-soft);
}

/* 配图 */
.page-faq .faq-figure {
  margin: 4px 0 16px;
  border: var(--line);
  border-radius: var(--radius-sm);
  background: var(--navy);
  overflow: hidden;
}

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

/* 三步流程 */
.page-faq .faq-steps {
  display: grid;
  gap: 10px;
  margin: 0 0 16px;
}

.page-faq .faq-step {
  padding: 14px 14px 12px;
  border: var(--line);
  border-radius: var(--radius-sm);
  background: rgba(8, 24, 43, .62);
}

.page-faq .faq-step-num {
  display: inline-block;
  margin-bottom: 8px;
  padding: 1px 7px;
  border: 1px solid rgba(255, 106, 19, .45);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-faq .faq-step h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-a .faq-step p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

/* 两栏答案 */
.page-faq .faq-a-split {
  display: grid;
  gap: 16px;
  align-items: start;
}

/* 三种定位思路 */
.page-faq .faq-paths {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: fqpath;
}

.page-faq .faq-path {
  position: relative;
  padding: 13px 14px 13px 50px;
  border: var(--line);
  border-radius: var(--radius-sm);
  background: rgba(8, 24, 43, .5);
}

.page-faq .faq-path::before {
  counter-increment: fqpath;
  content: counter(fqpath, decimal-leading-zero);
  position: absolute;
  left: 14px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--mint);
}

.page-faq .faq-a .faq-path h3 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .faq-a .faq-path p {
  margin: 0;
  font-size: 14.5px;
}

/* 反馈清单 */
.page-faq .faq-tips {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-tips li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-tips li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--electro);
}

/* 版本徽标 */
.page-faq .faq-ver {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 6px;
  background: var(--amber);
  color: var(--navy);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

/* 复制按钮 */
.page-faq .copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 2px;
  padding: 9px 16px;
  border: var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  transition: border-color .16s ease, background .16s ease, color .16s ease;
}

.page-faq .copy-btn:hover,
.page-faq .copy-btn:focus-visible {
  border-color: var(--orange);
  background: rgba(255, 106, 19, .1);
}

.page-faq .copy-btn.is-copied {
  border-color: var(--mint);
  color: var(--mint);
}

.page-faq .copy-hint {
  font-size: 12.5px;
  color: var(--muted);
}

.page-faq .copy-btn.is-copied .copy-hint {
  color: var(--mint);
}

/* ---------- 延伸入口 ---------- */
.page-faq .faq-next {
  padding: clamp(38px, 5vw, 64px) 0 clamp(48px, 6vw, 80px);
  border-top: var(--line);
  background: linear-gradient(180deg, rgba(16, 38, 63, .58), rgba(8, 24, 43, 0));
}

.page-faq .faq-next-head {
  margin-bottom: 22px;
}

.page-faq .faq-next-title {
  margin: 0 0 8px;
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-faq .faq-next-head p {
  margin: 0;
  font-size: 15.5px;
  color: var(--muted);
}

.page-faq .faq-next-grid {
  display: grid;
  gap: 14px;
}

.page-faq .faq-next-card {
  position: relative;
  display: block;
  padding: 20px 18px 24px;
  border: var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink);
  text-decoration: none;
  transition: border-color .16s ease, transform .16s ease;
}

.page-faq .faq-next-card:hover,
.page-faq .faq-next-card:focus-visible {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.page-faq .faq-next-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 9px;
  border: 1px solid rgba(59, 197, 255, .38);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--electro);
}

.page-faq .faq-next-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
}

.page-faq .faq-next-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-next-arrow {
  position: absolute;
  right: 16px;
  bottom: 12px;
  font-size: 18px;
  color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (max-width: 959px) {
  .page-faq .faq-index-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: thin;
  }

  .page-faq .faq-index-item {
    flex: 0 0 auto;
  }

  .page-faq .faq-index-link {
    white-space: nowrap;
    padding: 7px 12px;
    border-left: 0;
    border-bottom: 2px solid transparent;
    border-radius: var(--radius-sm);
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    border-left-color: transparent;
    border-bottom-color: var(--orange);
  }
}

@media (max-width: 639px) {
  .page-faq .faq-a {
    padding: 16px 18px 20px 18px;
  }

  .page-faq .faq-q {
    padding: 16px;
    gap: 10px;
  }

  .page-faq .faq-fact {
    padding-right: 16px;
    margin-right: 16px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-faq .faq-a-split {
    grid-template-columns: minmax(0, 1fr) 250px;
    gap: 22px;
  }

  .page-faq .faq-figure--side {
    margin: 4px 0 0;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 48px);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 52px);
  }

  .page-faq .faq-side-sticky {
    position: sticky;
    top: 92px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-next-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-flow {
    animation: none;
  }

  .page-faq .faq-next-card:hover {
    transform: none;
  }
}