.page-faq {
  --faq-border: rgba(244, 233, 216, 0.16);
  --faq-border-strong: rgba(244, 233, 216, 0.3);
  --faq-card: rgba(20, 27, 60, 0.72);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(96px, 16vw, 168px);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
  margin-top: clamp(20px, 3vw, 36px);
}

.page-faq .faq-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-weight: 300;
  font-size: clamp(38px, 7.4vw, 86px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-lede {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(244, 233, 216, 0.78);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-faq .faq-hero-visual {
  position: relative;
  min-height: 240px;
  border: 2px solid var(--faq-border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    radial-gradient(circle at 68% 26%, rgba(44, 242, 213, 0.24), transparent 58%),
    linear-gradient(140deg, rgba(255, 106, 26, 0.34), rgba(122, 59, 255, 0.34)),
    var(--ink-800);
}

.page-faq .faq-hero-visual::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto auto;
  width: 150%;
  height: 150%;
  background: repeating-linear-gradient(
    118deg,
    rgba(244, 233, 216, 0.06) 0 2px,
    transparent 2px 22px
  );
}

.page-faq .faq-orbit {
  position: absolute;
  border-radius: 50%;
  border: 2px solid rgba(244, 233, 216, 0.34);
}

.page-faq .faq-orbit--a {
  width: 118px;
  height: 118px;
  top: 16%;
  left: 12%;
}

.page-faq .faq-orbit--b {
  width: 62px;
  height: 62px;
  top: 52%;
  left: 40%;
  border-color: var(--cyan);
}

.page-faq .faq-orbit--c {
  width: 190px;
  height: 190px;
  right: -34px;
  bottom: -46px;
  border-color: rgba(255, 194, 75, 0.6);
}

.page-faq .faq-hero-glyph {
  position: absolute;
  right: 12%;
  top: 8%;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(96px, 16vw, 168px);
  line-height: 1;
  color: rgba(244, 233, 216, 0.9);
  text-shadow: 5px 5px 0 rgba(0, 0, 0, 0.45);
}

.page-faq .faq-hero-scale {
  position: absolute;
  left: 12%;
  bottom: 14%;
  display: flex;
  align-items: flex-end;
  gap: 6px;
}

.page-faq .faq-hero-scale i {
  display: block;
  width: 8px;
  border-radius: 2px;
  background: var(--cyan);
  opacity: 0.85;
}

.page-faq .faq-hero-scale i:nth-child(1) { height: 14px; }
.page-faq .faq-hero-scale i:nth-child(2) { height: 26px; }
.page-faq .faq-hero-scale i:nth-child(3) { height: 18px; }
.page-faq .faq-hero-scale i:nth-child(4) { height: 38px; background: var(--orange); }
.page-faq .faq-hero-scale i:nth-child(5) { height: 24px; }
.page-faq .faq-hero-scale i:nth-child(6) { height: 46px; background: var(--violet); }
.page-faq .faq-hero-scale i:nth-child(7) { height: 30px; }

/* ---------- 快速三问 ---------- */
.page-faq .faq-quick {
  padding-top: clamp(48px, 7vw, 88px);
}

.page-faq .faq-quick-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 3.4vw, 40px);
}

.page-faq .faq-quick-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(20px, 3vw, 30px);
  border: 2px solid var(--brown);
  border-radius: var(--radius-lg);
  background: var(--paper);
  color: var(--brown);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-quick-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 5px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: var(--grad-main);
}

.page-faq .faq-quick-tag {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--brown);
  color: var(--paper);
}

.page-faq .faq-quick-card h3 {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 900;
  line-height: 1.3;
}

.page-faq .faq-quick-card p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(27, 20, 16, 0.82);
}

.page-faq .faq-quick-link {
  margin-top: auto;
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--red-orange);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

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

/* ---------- 主体两栏 ---------- */
.page-faq .faq-main {
  padding-top: clamp(52px, 8vw, 96px);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  margin-top: clamp(12px, 2vw, 24px);
}

.page-faq .faq-rail-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-faq .faq-tiles {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 6px;
  scroll-snap-type: x mandatory;
}

.page-faq .faq-tile {
  flex: 0 0 auto;
  scroll-snap-align: start;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 12px 16px 12px 14px;
  border: 2px solid var(--faq-border);
  border-radius: var(--radius-md);
  background: var(--faq-card);
  color: var(--paper);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 240ms var(--ease), transform 240ms var(--ease);
}

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

.page-faq .faq-tile-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-faq .faq-tile-name {
  font-size: 15px;
  font-weight: 700;
}

.page-faq .faq-tile-count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: rgba(44, 242, 213, 0.14);
  color: var(--cyan);
}

/* ---------- 分组 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 120px;
}

.page-faq .faq-group + .faq-group,
.page-faq .faq-group + .faq-strip,
.page-faq .faq-strip + .faq-group {
  margin-top: clamp(46px, 7vw, 84px);
}

.page-faq .faq-group-head {
  display: grid;
  gap: 6px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--faq-border);
}

.page-faq .faq-group-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 900;
  line-height: 1.14;
  color: var(--paper);
}

.page-faq .faq-group-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--sand);
}

.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
  border: 2px solid var(--faq-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-faq .faq-figure--square {
  max-width: 520px;
}

.page-faq .faq-figure .media-caption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--sand);
  border-top: 1px solid var(--faq-border);
}

/* ---------- 问答折叠 ---------- */
.page-faq .faq-list {
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-item {
  border: 2px solid var(--faq-border);
  border-radius: var(--radius-md);
  background: var(--faq-card);
  transition: border-color 240ms var(--ease), background 240ms var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item[open] {
  border-color: var(--cyan);
  background: var(--ink-800);
}

.page-faq .faq-item > summary {
  position: relative;
  display: block;
  min-height: 44px;
  padding: 17px 56px 17px 18px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] > summary::after {
  content: "\2013";
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: var(--radius-md);
}

.page-faq .faq-answer {
  padding: 0 18px 18px;
  border-top: 1px solid var(--faq-border);
  margin-top: 2px;
}

.page-faq .faq-answer p {
  margin: 14px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 233, 216, 0.8);
}

/* ---------- 检索技巧横条 ---------- */
.page-faq .faq-strip {
  margin-top: clamp(46px, 7vw, 84px);
  padding: clamp(20px, 3vw, 32px);
  border: 2px solid var(--brown);
  border-radius: var(--radius-lg);
  background: var(--paper);
  color: var(--brown);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-strip-title {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--red-orange);
}

.page-faq .faq-strip-steps {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-faq .faq-strip-steps li {
  display: grid;
  grid-template-columns: 32px 1fr;
  grid-template-areas:
    "num title"
    "num text";
  column-gap: 12px;
  align-items: start;
  padding-left: 14px;
  border-left: 3px solid var(--red-orange);
}

.page-faq .faq-step-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--violet);
}

.page-faq .faq-strip-steps strong {
  grid-area: title;
  font-size: 16px;
  font-weight: 900;
  line-height: 1.4;
}

.page-faq .faq-strip-steps span:last-child {
  grid-area: text;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(27, 20, 16, 0.78);
}

/* ---------- 人工通道 ---------- */
.page-faq .faq-support-card {
  margin-top: clamp(20px, 3vw, 30px);
  padding: clamp(22px, 3.4vw, 36px);
  border: 2px solid var(--faq-border-strong);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(140deg, rgba(255, 106, 26, 0.16), rgba(122, 59, 255, 0.16)),
    var(--ink-800);
}

.page-faq .faq-support-card h3 {
  margin: 0;
  font-size: clamp(20px, 2.8vw, 28px);
  font-weight: 900;
  color: var(--paper);
}

.page-faq .faq-support-card p {
  margin: 14px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 233, 216, 0.82);
}

.page-faq .faq-support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 术语速查 ---------- */
.page-faq .faq-glossary {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-glossary-row {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--faq-border);
}

.page-faq .faq-glossary-row:first-child {
  border-top: 1px solid var(--faq-border);
}

.page-faq .faq-glossary dt {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .faq-glossary dd {
  margin: 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 233, 216, 0.78);
}

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

  .page-faq .faq-glossary-row {
    grid-template-columns: 160px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-faq .faq-strip-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-faq .faq-hero-visual {
    min-height: 340px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 264px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 112px;
  }

  .page-faq .faq-tiles {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-tile {
    width: 100%;
    justify-content: flex-start;
    white-space: normal;
  }

  .page-faq .faq-tile-count {
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tile,
  .page-faq .faq-item {
    transition: none;
  }
}