/* ===== 帮助中心 · 页面专属样式（限定 .page-faq） ===== */
.page-faq {
  --faq-rail: 236px;
  --faq-num-col: 44px;
  background: var(--ink-abyss);
  color: var(--paper);
  padding-bottom: clamp(40px, 7vw, 96px);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(22px, 4vw, 46px);
}

.page-faq .faq-hero-copy {
  display: grid;
  gap: 12px;
  max-width: 800px;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-size: clamp(34px, 6vw, 62px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.page-faq .lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-faq .faq-hero-media {
  max-width: var(--wrap-max);
  margin-inline: auto;
  margin-top: clamp(22px, 4vw, 44px);
  padding-inline: var(--gutter);
}

.page-faq .faq-hero-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 0, 100% 86%, 0 100%);
}

.page-faq .faq-hero-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(112deg, rgba(6, 18, 31, 0.86) 0%, rgba(6, 18, 31, 0.14) 46%, rgba(53, 242, 192, 0.18) 100%);
  pointer-events: none;
}

.page-faq .faq-hero-frame img {
  display: block;
  width: 100%;
  height: clamp(180px, 26vw, 300px);
  object-fit: cover;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  padding-block: clamp(26px, 5vw, 62px);
}

/* ---------- 左侧分组索引 ---------- */
.page-faq .faq-rail-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper-dim);
}

.page-faq .faq-rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-rail-link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 14px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--paper-dim);
  text-decoration: none;
  white-space: nowrap;
  background: var(--ink-glass);
  border: 1px solid var(--line-hair);
  border-radius: 999px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .faq-rail-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--volt);
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  color: var(--paper);
  border-color: var(--volt-dim);
  background: rgba(53, 242, 192, 0.08);
}

/* ---------- 右侧问答区 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
  padding-bottom: clamp(28px, 4.4vw, 54px);
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--line-hair);
  padding-top: clamp(26px, 4.4vw, 52px);
}

.page-faq .faq-group-head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(10px, 1.8vw, 20px);
}

.page-faq .faq-group-no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--volt);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.page-faq .faq-group-desc {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper-dim);
}

.page-faq .faq-item {
  display: grid;
  grid-template-columns: var(--faq-num-col) minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--line-hair);
}

.page-faq .faq-item:last-child {
  border-bottom: 1px solid var(--line-hair);
}

.page-faq .faq-item-no {
  margin: 0;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.05em;
  color: var(--volt);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-q {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .faq-a {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-faq .faq-a + .faq-a {
  margin-top: 8px;
}

.page-faq .faq-a a,
.page-faq .faq-group-desc a {
  color: var(--volt);
  text-decoration: underline;
  text-decoration-color: rgba(53, 242, 192, 0.42);
  text-underline-offset: 3px;
  transition: text-decoration-color 0.25s var(--ease);
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible,
.page-faq .faq-group-desc a:hover {
  text-decoration-color: var(--volt);
}

/* ---------- 步骤序号 ---------- */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 10px 0 0;
  padding: 0;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 34px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--volt);
}

.page-faq .faq-steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 21px;
  bottom: -8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--volt-dim), rgba(31, 169, 138, 0));
}

/* ---------- 分组配图 ---------- */
.page-faq .faq-group-media {
  margin: clamp(18px, 3vw, 30px) 0 0 auto;
  max-width: 520px;
}

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

.page-faq .faq-figcap {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--paper-dim);
}

/* ---------- 底部联系条 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(22px, 4vw, 42px);
  padding: clamp(20px, 3.4vw, 36px);
  border-radius: var(--radius);
  border-left: 3px solid var(--coral);
}

.page-faq .faq-contact h2 {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 900;
  line-height: 1.3;
}

.page-faq .faq-contact p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-dim);
}

.page-faq .faq-contact-list {
  display: grid;
  gap: 14px;
  margin: 0 0 16px;
  padding: 0;
}

.page-faq .faq-contact-list > div {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-faq .faq-contact-list dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--volt-dim);
}

.page-faq .faq-contact-list dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--paper-dim);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--line-hair);
  }

  .page-faq .faq-rail-link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    padding: 12px 12px 12px 14px;
    font-size: 14.5px;
  }

  .page-faq .faq-rail-link:hover,
  .page-faq .faq-rail-link:focus-visible {
    border-left-color: var(--volt);
    background: rgba(53, 242, 192, 0.06);
  }

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

@media (min-width: 1200px) {
  .page-faq {
    --faq-rail: 268px;
    --faq-num-col: 52px;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail-link,
  .page-faq .faq-a a {
    transition: none;
  }

  .page-faq .faq-hero-frame {
    clip-path: none;
  }
}
</main>