.page-faq {
  --faq-rule: rgba(232, 241, 238, 0.14);
  --faq-rule-soft: rgba(232, 241, 238, 0.08);
  --faq-panel: rgba(11, 47, 38, 0.72);
  display: block;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
}

.page-faq h1,
.page-faq h2 {
  font-family: var(--font-display);
  font-weight: 700;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(104px, 15vw, 184px) 0 clamp(44px, 6vw, 76px);
  background:
    radial-gradient(90% 70% at 8% 0%, rgba(111, 247, 208, 0.13), transparent 62%),
    radial-gradient(70% 62% at 98% 6%, rgba(255, 122, 47, 0.09), transparent 64%),
    var(--ink-900);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(111, 247, 208, 0.4), transparent);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(36px, 5vw, 64px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-hero__latin {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(3rem, 11vw, 5.6rem);
  line-height: 0.98;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__intro {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.5vw, 34px);
}

.page-faq .faq-hero__index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--faq-rule);
}

.page-faq .faq-hero__index li {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-hero__index a {
  display: flex;
  align-items: baseline;
  gap: 16px;
  min-height: 56px;
  padding: 16px 4px;
  color: var(--paper);
  font-size: 15px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 200ms var(--ease), padding-left 200ms var(--ease);
}

.page-faq .faq-hero__index a:hover,
.page-faq .faq-hero__index a:focus-visible {
  color: var(--cyan);
  padding-left: 12px;
}

.page-faq .faq-hero__index a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-hero__index .mono {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 色带 ---------- */

.page-faq > .band {
  height: clamp(44px, 6vw, 88px);
}

/* ---------- 分组 ---------- */

.page-faq .qa-group {
  padding: clamp(48px, 7vw, 96px) 0;
}

.page-faq .qa-group + .qa-group {
  border-top: 1px solid var(--faq-rule-soft);
}

.page-faq .qa-group__shell {
  display: grid;
  gap: clamp(28px, 4vw, 44px);
}

.page-faq .qa-group__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 4.4rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .qa-group__title {
  margin: 16px 0 0;
  font-size: clamp(1.65rem, 3.6vw, 2.35rem);
  line-height: 1.15;
  color: var(--paper);
}

.page-faq .qa-group__note {
  margin: 14px 0 0;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 手风琴 ---------- */

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

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  min-height: 56px;
  padding: 22px 4px;
  cursor: pointer;
  font-size: clamp(1.02rem, 2.2vw, 1.15rem);
  line-height: 1.55;
  color: var(--paper);
  list-style: none;
  transition: color 200ms var(--ease);
}

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

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

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-faq .qa__arrow {
  position: relative;
  flex: none;
  width: 24px;
  height: 24px;
  margin-top: 3px;
  border: 1px solid var(--cyan-line);
  border-radius: 50%;
  transition: transform 240ms var(--ease), background-color 240ms var(--ease);
}

.page-faq .qa__arrow::before,
.page-faq .qa__arrow::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--cyan);
  transition: opacity 240ms var(--ease), transform 240ms var(--ease);
}

.page-faq .qa__arrow::before {
  width: 10px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .qa__arrow::after {
  width: 1.5px;
  height: 10px;
  transform: translate(-50%, -50%);
}

.page-faq .qa[open] .qa__arrow {
  transform: rotate(180deg);
  background-color: var(--cyan-soft);
}

.page-faq .qa[open] .qa__arrow::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .qa__a {
  max-width: 68ch;
  padding: 0 4px 26px;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-faq .qa__a p + p {
  margin-top: 12px;
}

.page-faq .qa__a .term {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: var(--cyan-line);
  text-underline-offset: 4px;
}

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: var(--cyan-line);
  text-underline-offset: 4px;
}

.page-faq .qa__a a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .qa[open] .qa__a {
  animation: faq-open 260ms var(--ease);
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 图片 ---------- */

.page-faq .qa-figure {
  margin: clamp(32px, 5vw, 56px) 0 0;
}

.page-faq .qa-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.page-faq .qa-figure__cap {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .qa-figure--phone {
  max-width: 560px;
}

/* ---------- 客服渠道块 ---------- */

.page-faq .qa-channel {
  margin-top: clamp(30px, 4.5vw, 48px);
  max-width: 620px;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius-md);
  background:
    linear-gradient(150deg, rgba(16, 71, 58, 0.78), rgba(11, 47, 38, 0.94)),
    var(--faq-panel);
}

.page-faq .qa-channel__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .qa-channel__line {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .qa-channel__line .mono {
  font-size: clamp(1rem, 2.6vw, 1.18rem);
  letter-spacing: 0.02em;
  color: var(--cyan);
  word-break: break-word;
}

.page-faq .qa-channel__note {
  margin: 16px 0 22px;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 滚动显现 ---------- */

.js .page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 320ms var(--ease), transform 320ms var(--ease);
}

.js .page-faq [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 平板与桌面 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .faq-hero__index {
    padding-bottom: 6px;
  }
}

@media (min-width: 960px) {
  .page-faq .qa-group__shell {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(40px, 5vw, 76px);
    align-items: start;
  }

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

  .page-faq .qa__q {
    padding: 24px 4px;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .js .page-faq [data-reveal],
  .js .page-faq [data-reveal].is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-faq .qa[open] .qa__a {
    animation: none;
  }

  .page-faq .qa__arrow,
  .page-faq .qa__arrow::before,
  .page-faq .qa__arrow::after,
  .page-faq .faq-hero__index a,
  .page-faq .qa__q {
    transition: none;
  }
}