.page-faq {
  --faq-bg: #FFFFFF;
  --faq-line: var(--paper-200);
  --faq-ink-soft: rgba(232, 240, 247, .74);
  background: var(--paper-50);
  color: var(--text-900);
  scroll-behavior: smooth;
}

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

.page-faq .mono {
  font-family: var(--font-mono);
  letter-spacing: .05em;
}

/* ---------- 框景首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: var(--s-28) 0 var(--s-40);
  color: var(--text-invert);
  background:
    radial-gradient(120% 92% at 10% 0%, rgba(47, 227, 196, .18), transparent 58%),
    radial-gradient(90% 70% at 92% 100%, rgba(255, 122, 47, .16), transparent 62%),
    linear-gradient(158deg, var(--ink-950) 0%, var(--ink-800) 64%, #0b1f33 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content:
    "01 —— 02 —— 03 —— 04 —— 05 —— 06";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .34em;
  text-align: center;
  color: rgba(155, 243, 228, .32);
  pointer-events: none;
}

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

.page-faq .faq-hero .breadcrumb {
  margin-bottom: var(--s-20);
  font-size: 13px;
}

.page-faq .faq-hero .breadcrumb__item {
  color: var(--faq-ink-soft);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 var(--s-12);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan-400);
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 18em;
  font-size: clamp(28px, 7vw, 56px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.015em;
}

.page-faq .faq-hero__lead {
  margin: var(--s-20) 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s-12);
  margin: var(--s-28) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .fact {
  padding: var(--s-12) 0 0;
  border-top: 1px solid var(--hair-ink);
}

.page-faq .fact__num {
  display: block;
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan-200);
}

.page-faq .fact__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--faq-ink-soft);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s-20);
  padding-bottom: var(--s-56);
}

.page-faq .faq-rail {
  position: sticky;
  top: 78px;
  z-index: 5;
  margin: 0 calc(var(--s-16) * -1);
  padding: var(--s-12) var(--s-16);
  background: rgba(247, 249, 251, .94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-rail__label {
  display: none;
  margin: 0 0 var(--s-12);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--text-500);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: var(--s-12);
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-rail__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  padding: 6px 12px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-500);
  text-decoration: none;
  background: var(--faq-bg);
  border: 1px solid var(--faq-line);
  border-radius: 999px;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-600);
}

.page-faq .faq-rail__link.is-active {
  color: var(--text-900);
  border-color: var(--cyan-400);
  background: rgba(47, 227, 196, .1);
}

.page-faq .faq-section {
  padding: var(--s-28) 0;
  border-top: 1px solid var(--faq-line);
  scroll-margin-top: 132px;
}

.page-faq .faq-section:first-child {
  border-top: 0;
  padding-top: var(--s-12);
}

.page-faq .sec-head {
  margin-bottom: var(--s-20);
}

.page-faq .sec-num {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange-500);
}

.page-faq .sec-head h2 {
  margin: 6px 0 0;
  font-size: clamp(22px, 5vw, 32px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -.01em;
}

.page-faq .sec-lead {
  margin: var(--s-12) 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-500);
}

/* ---------- 主题入口 ---------- */
.page-faq .topic-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s-12);
}

.page-faq .topic {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 2px var(--s-12);
  padding: var(--s-16);
  text-decoration: none;
  color: var(--text-900);
  background: var(--faq-bg);
  border: 1px solid var(--faq-line);
  border-left: 2px solid var(--faq-line);
  border-radius: var(--radius-sm);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-faq .topic:hover,
.page-faq .topic:focus-visible {
  border-left-color: var(--cyan-400);
  transform: translateX(4px);
}

.page-faq .topic__num {
  grid-row: span 2;
  align-self: start;
  font-size: 13px;
  color: var(--cyan-600);
}

.page-faq .topic__name {
  font-size: 16px;
  font-weight: 700;
}

.page-faq .topic__desc {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.65;
  color: var(--text-500);
}

.page-faq .topic--quiet {
  background: rgba(220, 229, 238, .38);
  border-style: dashed;
}

.page-faq .faq-figure {
  margin: var(--s-20) 0 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-faq .faq-figure__cap {
  padding: var(--s-12) var(--s-16);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-500);
  background: var(--paper-50);
  border-top: 1px solid var(--faq-line);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-list {
  display: grid;
  gap: var(--s-12);
}

.page-faq .qa {
  background: var(--faq-bg);
  border: 1px solid var(--faq-line);
  border-left: 2px solid var(--faq-line);
  border-radius: var(--radius-sm);
  transition: border-color .2s var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--cyan-400);
  border-color: rgba(47, 227, 196, .45);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: var(--s-12);
  padding: var(--s-16) var(--s-16) var(--s-16) var(--s-20);
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
}

.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: 17px;
  line-height: 1.5;
  color: var(--cyan-600);
}

.page-faq .qa[open] .qa__q::after {
  content: "\2013";
}

.page-faq .qa__a {
  padding: 0 var(--s-20) var(--s-20);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-500);
}

.page-faq .qa__a p {
  margin: 0 0 var(--s-12);
}

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

.page-faq .steps {
  display: grid;
  gap: 8px;
  margin: var(--s-12) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .steps li {
  display: flex;
  align-items: flex-start;
  gap: var(--s-12);
  font-size: 14px;
  line-height: 1.75;
}

.page-faq .steps__num {
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--cyan-600);
  padding-top: 3px;
}

.page-faq .steps--block {
  gap: var(--s-12);
  margin: 0 0 var(--s-20);
}

.page-faq .steps--block li {
  padding: var(--s-12) var(--s-16);
  font-size: 15px;
  background: var(--faq-bg);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-sm);
}

.page-faq .fmt-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .fmt-list li {
  font-size: 14px;
  line-height: 1.75;
}

.page-faq .fmt-list .mono {
  color: var(--text-900);
  font-weight: 600;
}

/* ---------- 索引选择 ---------- */
.page-faq .picker {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s-12);
  margin-bottom: var(--s-20);
}

.page-faq .picker__step {
  padding: var(--s-16);
  background: linear-gradient(170deg, var(--faq-bg) 0%, rgba(155, 243, 228, .12) 100%);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-sm);
}

.page-faq .picker__num {
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan-600);
}

.page-faq .picker__step h3 {
  margin: 8px 0 var(--s-12);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.page-faq .picker__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-500);
}

.page-faq .decision {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .decision__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: var(--s-12) var(--s-16);
  background: var(--faq-bg);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--cyan-200);
  border-radius: var(--radius-sm);
}

.page-faq .decision__cond {
  font-size: 13px;
  color: var(--orange-500);
}

.page-faq .decision__rec {
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-900);
}

.page-faq .note-block {
  margin-top: var(--s-20);
  padding: var(--s-16) var(--s-20);
  background: var(--orange-100);
  border-radius: var(--radius-sm);
}

.page-faq .note-block p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--orange-700);
}

/* ---------- 反馈面板 ---------- */
.page-faq .feedback-panel {
  position: relative;
  padding: var(--s-20);
  color: var(--text-invert);
  background:
    radial-gradient(110% 80% at 100% 0%, rgba(255, 122, 47, .18), transparent 60%),
    linear-gradient(152deg, var(--ink-800) 0%, var(--ink-950) 100%);
  border: 1px solid var(--hair-ink);
  border-radius: var(--radius);
}

.page-faq .feedback-panel__lead {
  margin: 0 0 var(--s-20);
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

.page-faq .fb-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px var(--s-12);
  padding: var(--s-12) 0;
  border-top: 1px solid var(--hair-ink);
}

.page-faq .fb-row__label {
  flex: 0 0 76px;
  font-size: 13px;
  color: var(--cyan-200);
}

.page-faq .fb-row__value {
  flex: 1 1 200px;
  min-width: 0;
  font-size: 14px;
  line-height: 1.6;
  word-break: break-all;
}

.page-faq .fb-copy {
  flex: 0 0 auto;
  padding: 6px 14px;
  font-size: 12px;
  color: var(--cyan-200);
  background: rgba(47, 227, 196, .12);
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-faq .fb-copy:hover,
.page-faq .fb-copy:focus-visible {
  background: rgba(47, 227, 196, .22);
  color: #FFFFFF;
}

.page-faq .fb-copy.is-done {
  color: var(--ink-950);
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

.page-faq .feedback-panel__tip {
  margin: var(--s-16) 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

.page-faq .feedback-panel__foot {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-16);
  margin-top: var(--s-20);
  padding-top: var(--s-16);
  border-top: 1px solid var(--hair-ink);
}

.page-faq .fb-top,
.page-faq .fb-more {
  font-size: 13px;
  letter-spacing: .04em;
  text-decoration: none;
}

.page-faq .fb-top {
  color: var(--text-invert);
  border-bottom: 1px solid var(--cyan-400);
  padding-bottom: 2px;
}

.page-faq .fb-more {
  color: var(--orange-500);
  border-bottom: 1px solid rgba(255, 122, 47, .5);
  padding-bottom: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding: var(--s-40) 0 var(--s-56);
  }

  .page-faq .faq-hero::before {
    inset: 18px;
  }

  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--s-20);
  }

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

  .page-faq .picker {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .decision__row {
    grid-template-columns: minmax(140px, 200px) minmax(0, 1fr);
    align-items: baseline;
    gap: var(--s-16);
  }

  .page-faq .feedback-panel {
    padding: var(--s-28);
  }

  .page-faq .fb-row__label {
    flex-basis: 88px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: var(--s-40);
    align-items: start;
    padding-top: var(--s-28);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    margin: 0;
    padding: 0;
    background: transparent;
    backdrop-filter: none;
    border-bottom: 0;
    border-left: 1px solid var(--faq-line);
  }

  .page-faq .faq-rail__label {
    display: block;
    padding-left: var(--s-16);
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-rail__link {
    width: 100%;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    padding: 9px var(--s-16);
    white-space: normal;
  }

  .page-faq .faq-rail__link.is-active {
    background: rgba(47, 227, 196, .08);
    border-left-color: var(--cyan-400);
    transform: translateX(4px);
  }

  .page-faq .faq-section {
    padding: var(--s-40) 0;
    scroll-margin-top: 118px;
  }

  .page-faq .faq-section:first-child {
    padding-top: 0;
  }

  .page-faq .topic-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-hero__lead {
    font-size: 17px;
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
  }

  .page-faq .faq-hero__facts {
    max-width: 760px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .topic,
  .page-faq .qa,
  .page-faq .fb-copy,
  .page-faq .faq-rail__link {
    transition: none;
  }

  .page-faq .topic:hover,
  .page-faq .topic:focus-visible,
  .page-faq .faq-rail__link.is-active {
    transform: none;
  }
}