.page-faq {
  --faq-edge: rgba(53, 224, 214, 0.30);
  --faq-edge-soft: rgba(78, 107, 92, 0.46);
  --faq-panel: rgba(16, 31, 60, 0.68);
  --faq-panel-soft: rgba(11, 43, 38, 0.62);
  --faq-maxw: 1160px;

  position: relative;
  overflow-x: hidden;
  padding-bottom: 88px;
  background:
    radial-gradient(1100px 560px at 88% -8%, rgba(53, 224, 214, 0.14), transparent 62%),
    radial-gradient(840px 520px at 2% 12%, rgba(255, 106, 43, 0.12), transparent 64%),
    linear-gradient(176deg, var(--ink-green) 0%, var(--deep-blue) 54%, var(--ink-green) 100%);
  color: var(--text-body);
  font-family: var(--font-body);
}

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

.page-faq .num {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.04em;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 24px 0 8px;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  top: -70px;
  right: -14%;
  width: min(640px, 80vw);
  height: 250px;
  background: linear-gradient(102deg, rgba(53, 224, 214, 0.14), rgba(255, 106, 43, 0.07) 56%, transparent 80%);
  transform: skewY(-4deg);
  pointer-events: none;
}

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

.page-faq .faq-hero .eyebrow {
  margin: 22px 0 0;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 20em;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(29px, 7.6vw, 60px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #fff;
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 620px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-body);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 15px;
  border: 1px solid var(--faq-edge-soft);
  border-radius: var(--radius-pill);
  background: rgba(11, 43, 38, 0.52);
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-hero__meta .num {
  color: var(--cyan);
  font-size: 14px;
}

/* ---------- 区块标题 ---------- */

.page-faq .section {
  padding-top: 64px;
}

.page-faq .sec-head {
  display: grid;
  gap: 8px;
  margin-bottom: 28px;
}

.page-faq .sec-head__no {
  font-size: clamp(34px, 8vw, 46px);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(53, 224, 214, 0.55);
}

.page-faq .sec-head__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(25px, 6vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: #fff;
}

.page-faq .sec-head__note {
  margin: 0;
  max-width: 520px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 三步自查 ---------- */

.page-faq .checkup__grid {
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .checkup__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .checkup__step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 20px 22px;
  border: 1px solid var(--faq-edge-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--faq-panel), var(--faq-panel-soft));
}

.page-faq .checkup__no {
  align-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--faq-edge);
  color: var(--cyan);
  font-size: 15px;
  background: rgba(53, 224, 214, 0.08);
}

.page-faq .checkup__body h3 {
  margin: 4px 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--cream);
  letter-spacing: -0.01em;
}

.page-faq .checkup__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq .checkup__figure {
  align-self: stretch;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--faq-edge-soft);
  background: var(--faq-panel-soft);
}

.page-faq .checkup__figure img {
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
}

/* ---------- 问答双栏 ---------- */

.page-faq .qa-layout {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .qa-aside {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .qa-aside__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-faq .qa-aside__count {
  margin: 0;
  font-size: 13px;
  color: var(--text-dim);
}

.page-faq .qa-aside__count .num {
  color: var(--cyan);
}

.page-faq .filter-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(84px, 1fr));
  gap: 8px;
}

.page-faq .filter-btn {
  padding: 9px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--faq-edge-soft);
  background: rgba(16, 31, 60, 0.55);
  color: var(--text-dim);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.2;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .filter-btn:hover {
  color: var(--cream);
  border-color: var(--faq-edge);
}

.page-faq .filter-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--neon);
  border-color: var(--neon);
  color: #1a1208;
  font-weight: 700;
  box-shadow: var(--shadow-glow);
}

.page-faq .qa-panel {
  display: grid;
  gap: 22px;
}

.page-faq .qa-group {
  padding: 22px 20px 14px;
  border: 1px solid var(--faq-edge-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(16, 31, 60, 0.76), rgba(11, 43, 38, 0.62));
  box-shadow: var(--shadow-deep);
}

.page-faq .qa-group__head {
  padding-left: 14px;
  border-left: 3px solid var(--neon);
  margin-bottom: 14px;
}

.page-faq .qa-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: #fff;
}

.page-faq .qa-group__note {
  margin: 5px 0 0;
  font-size: 13px;
  color: var(--text-dim);
}

.page-faq .qa-item {
  border-top: 1px solid var(--faq-edge-soft);
}

.page-faq .qa-item__q {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px 14px;
  padding: 15px 4px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}

.page-faq .qa-item__ask {
  grid-column: 1 / -1;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--cream);
}

.page-faq .qa-item[open] .qa-item__ask {
  color: var(--amber);
}

.page-faq .qa-state {
  grid-column: 1;
  justify-self: start;
  padding: 4px 11px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 12px;
  line-height: 1.4;
  white-space: nowrap;
}

.page-faq .qa-state--ok {
  color: var(--cyan);
  border-color: rgba(53, 224, 214, 0.42);
  background: rgba(53, 224, 214, 0.1);
}

.page-faq .qa-state--hot {
  color: var(--amber);
  border-color: rgba(255, 178, 92, 0.42);
  background: rgba(255, 178, 92, 0.1);
}

.page-faq .qa-state--help {
  color: var(--signal);
  border-color: rgba(255, 77, 69, 0.45);
  background: rgba(255, 77, 69, 0.1);
}

.page-faq .qa-item__chev {
  grid-column: 2;
  justify-self: end;
  position: relative;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--faq-edge);
  background: rgba(53, 224, 214, 0.06);
}

.page-faq .qa-item__chev::before,
.page-faq .qa-item__chev::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1.5px;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

.page-faq .qa-item__chev::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform 0.2s ease;
}

.page-faq .qa-item[open] .qa-item__chev::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .qa-item__a {
  padding: 0 4px 18px;
  border-radius: var(--radius-sm);
}

.page-faq .qa-item__a p {
  margin: 0;
  max-width: 640px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-body);
}

.page-faq .qa-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 214, 0.45);
}

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

.page-faq .qa-item[open] .qa-item__a {
  animation: faqReveal 0.22s ease both;
}

@keyframes faqReveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 联系兜底 ---------- */

.page-faq .help-band {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 1fr);
  padding: 24px 20px;
  border: 1px solid var(--faq-edge);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(140deg, rgba(255, 106, 43, 0.10), transparent 46%),
    linear-gradient(180deg, rgba(16, 31, 60, 0.82), rgba(11, 43, 38, 0.7));
  box-shadow: var(--shadow-deep);
}

.page-faq .help-channels {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .help-channel {
  display: grid;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
}

.page-faq .help-channel__k {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .help-channel__v {
  font-size: clamp(17px, 4.4vw, 22px);
  color: var(--amber);
  word-break: break-all;
}

.page-faq .help-channel__note {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-faq .help-band__tip {
  margin: 18px 0 22px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-body);
}

.page-faq .help-band__tip a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 214, 0.45);
}

.page-faq .help-band__figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--faq-edge-soft);
}

.page-faq .help-band__figure img {
  width: 100%;
  height: 100%;
  min-height: 200px;
  object-fit: cover;
}

.page-faq .figure-frame__caption {
  display: block;
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
  background: rgba(11, 43, 38, 0.72);
}

/* ---------- 响应式 ---------- */

@media (max-width: 639px) {
  .page-faq .faq-hero h1 {
    max-width: none;
  }

  .page-faq .checkup__step {
    grid-template-columns: 38px minmax(0, 1fr);
    padding: 18px 16px 20px;
  }

  .page-faq .checkup__no {
    width: 38px;
    height: 38px;
    font-size: 13px;
  }

  .page-faq .qa-group,
  .page-faq .help-band {
    padding-left: 16px;
    padding-right: 16px;
  }

  .page-faq .filter-bar {
    grid-template-columns: repeat(auto-fit, minmax(72px, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .section {
    padding-top: 84px;
  }

  .page-faq .sec-head {
    margin-bottom: 34px;
  }

  .page-faq .qa-item__q {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 4px;
  }

  .page-faq .qa-item__ask {
    flex: 1 1 auto;
    grid-column: auto;
  }

  .page-faq .qa-state {
    flex: 0 0 auto;
    grid-column: auto;
  }

  .page-faq .qa-item__chev {
    flex: 0 0 22px;
    grid-column: auto;
  }
}

@media (min-width: 900px) {
  .page-faq .checkup__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 34px;
    align-items: stretch;
  }

  .page-faq .help-band {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: 34px;
    align-items: center;
    padding: 34px 32px;
  }
}

@media (min-width: 1040px) {
  .page-faq {
    padding-bottom: 110px;
  }

  .page-faq .section {
    padding-top: 96px;
  }

  .page-faq .qa-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .qa-aside {
    position: sticky;
    top: 116px;
  }

  .page-faq .filter-bar {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .qa-panel {
    gap: 26px;
  }

  .page-faq .qa-group {
    padding: 26px 26px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item[open] .qa-item__a {
    animation: none;
  }

  .page-faq .qa-item__chev::after,
  .page-faq .filter-btn {
    transition: none;
  }
}