/* ===== 支持中心 / page-faq ===== */

.page-faq {
  --faq-sticky: calc(var(--header-h) + 26px);
  background: var(--deep);
  color: var(--paper);
  overflow-x: clip;
}

.page-faq > .breadcrumb {
  padding-top: clamp(14px, 2.5vw, 26px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding-top: clamp(24px, 4vw, 46px);
  padding-bottom: clamp(36px, 6vw, 72px);
}

.page-faq .faq-hero__frame {
  position: relative;
  border: 2px solid var(--hairline-strong);
  padding: clamp(24px, 4vw, 52px) clamp(20px, 4vw, 48px);
  display: grid;
  gap: clamp(28px, 4vw, 44px);
  background:
    linear-gradient(122deg, var(--cyan-wash), transparent 48%),
    linear-gradient(302deg, var(--coral-wash), transparent 42%),
    var(--deep);
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid var(--cyan);
  pointer-events: none;
}

.page-faq .faq-hero__frame::before {
  top: -2px;
  left: -2px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-hero__frame::after {
  bottom: -2px;
  right: -2px;
  border-left: 0;
  border-top: 0;
}

.page-faq .faq-hero__lead .headline {
  margin: 12px 0 0;
  letter-spacing: -0.02em;
  max-width: 20em;
}

.page-faq .faq-hero__lead .prose {
  margin-top: 18px;
  max-width: 36em;
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.page-faq .faq-hero__stats li {
  background: var(--carbon);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.page-faq .faq-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

.page-faq .faq-stat__label {
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: rgba(244, 241, 234, 0.6);
}

/* ---------- 主体：索引 + 问答 ---------- */

.page-faq .faq-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  border-left: 1px solid var(--hairline);
}

.page-faq .faq-index__list li {
  margin: 0;
}

.page-faq .faq-index__list a {
  display: block;
  margin-left: -1px;
  padding: 9px 0 9px 14px;
  border-left: 1px solid transparent;
  font-size: 13.5px;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: rgba(244, 241, 234, 0.62);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, padding-left 0.18s ease;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  padding-left: 18px;
}

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

.page-faq .faq-index__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--hairline);
  font-size: 12px;
  line-height: 1.7;
  color: rgba(244, 241, 234, 0.45);
}

.page-faq .faq-body {
  display: grid;
  gap: clamp(40px, 6vw, 76px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
  min-width: 0;
}

.page-faq .faq-group__head {
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 2px solid var(--hairline-strong);
}

.page-faq .faq-group__head .headline {
  margin: 8px 0 0;
  font-size: clamp(22px, 3.4vw, 32px);
  letter-spacing: -0.01em;
}

/* ---------- 折叠问答 ---------- */

.page-faq .qa {
  border: 2px solid var(--hairline);
  border-left-width: 5px;
  background: rgba(5, 9, 15, 0.55);
  margin-bottom: 12px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.page-faq .qa[open] {
  border-color: var(--hairline-strong);
  border-left-color: var(--cyan);
  background: rgba(5, 9, 15, 0.85);
  box-shadow: 7px 7px 0 var(--carbon);
}

.page-faq .qa summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 15px 16px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
}

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

.page-faq .qa summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.1;
  color: var(--cyan);
}

.page-faq .qa[open] summary::after {
  content: "–";
}

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

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

.page-faq .qa__a {
  padding: 0 16px 18px;
  border-top: 1px solid var(--hairline-soft);
  margin-top: 2px;
}

.page-faq .qa__a p {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.82);
}

.page-faq .qa__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  max-width: 36em;
}

.page-faq .qa__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(244, 241, 234, 0.82);
}

.page-faq .qa__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 2px;
  background: var(--coral);
}

.page-faq .qa__list strong {
  color: var(--paper);
}

.page-faq .link-inline {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 1px;
}

.page-faq .link-inline:hover,
.page-faq .link-inline:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- 更新节奏 ---------- */

.page-faq .faq-rhythm {
  width: 100%;
  margin: clamp(48px, 8vw, 88px) 0;
  padding: clamp(30px, 4.5vw, 52px) 0;
  border-top: 2px solid var(--hairline-strong);
  border-bottom: 2px solid var(--hairline-strong);
  background:
    linear-gradient(96deg, var(--home-wash), transparent 38%, transparent 62%, var(--away-wash)),
    var(--deep);
}

.page-faq .faq-rhythm__head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-faq .faq-rhythm__head .headline {
  margin: 10px 0 0;
  font-size: clamp(22px, 3.6vw, 34px);
  letter-spacing: -0.01em;
}

.page-faq .faq-rhythm__head .prose {
  margin-top: 16px;
  max-width: 36em;
}

.page-faq .faq-rhythm__body {
  display: grid;
  gap: clamp(24px, 3.5vw, 40px);
}

.page-faq .faq-rhythm__media {
  margin: 0;
  border: 2px solid var(--hairline-strong);
  box-shadow: 8px 8px 0 var(--carbon);
  overflow: hidden;
}

.page-faq .faq-rhythm__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06);
}

.page-faq .faq-rhythm__media .fig-cap {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--hairline);
  background: var(--carbon);
  color: rgba(244, 241, 234, 0.55);
}

.page-faq .rhythm-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
  position: relative;
}

.page-faq .rhythm-track__node {
  position: relative;
  padding-left: 26px;
  display: grid;
  gap: 6px;
}

.page-faq .rhythm-track__node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 10px;
  height: 10px;
  background: var(--away);
}

.page-faq .rhythm-track__node::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 21px;
  bottom: -20px;
  width: 2px;
  background: repeating-linear-gradient(to bottom, var(--hairline-strong) 0 4px, transparent 4px 9px);
}

.page-faq .rhythm-track__node:last-child::after {
  display: none;
}

.page-faq .rhythm-track__node--peak::before {
  background: var(--cyan);
}

.page-faq .rhythm-track__when {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .rhythm-track__node--peak .rhythm-track__when {
  color: var(--coral);
}

.page-faq .rhythm-track__what {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(244, 241, 234, 0.76);
  max-width: 30em;
}

/* ---------- 术语双列 ---------- */

.page-faq .term-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.page-faq .term {
  background: var(--deep);
  padding: 18px 18px 20px;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .term:hover,
.page-faq .term:focus-within {
  background: rgba(53, 240, 208, 0.07);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-faq .term__name {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 9px;
}

.page-faq .term__def {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(244, 241, 234, 0.78);
}

/* ---------- 人工帮助 ---------- */

.page-faq .faq-help {
  margin-top: clamp(56px, 8vw, 96px);
  padding: clamp(36px, 6vw, 72px) 0;
  background: var(--carbon);
  border-top: 2px solid var(--hairline-strong);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-faq .faq-help__text .headline {
  margin: 10px 0 0;
  font-size: clamp(23px, 3.6vw, 34px);
  letter-spacing: -0.01em;
}

.page-faq .faq-help__text .prose {
  margin-top: 16px;
  max-width: 36em;
}

.page-faq .faq-help__points {
  list-style: none;
  margin: 24px 0 26px;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-faq .faq-help__points li {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--hairline-soft);
}

.page-faq .faq-help__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--coral);
  padding-top: 2px;
}

.page-faq .faq-help__val {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(244, 241, 234, 0.82);
}

.page-faq .faq-help__media {
  margin: 0;
  border: 2px solid var(--hairline-strong);
  box-shadow: -8px 8px 0 var(--deep);
  overflow: hidden;
}

.page-faq .faq-help__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.08);
}

.page-faq .faq-help__media .fig-cap {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--hairline);
  background: var(--deep);
  color: rgba(244, 241, 234, 0.55);
}

/* ---------- 动效 ---------- */

.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .term-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-hero__stats li {
    padding: 18px 18px 20px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-rhythm__head {
    display: grid;
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    column-gap: clamp(24px, 4vw, 56px);
    align-items: end;
  }

  .page-faq .faq-rhythm__head .eyebrow {
    grid-column: 1 / -1;
  }

  .page-faq .faq-rhythm__head .prose {
    margin-top: 0;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-rhythm__body {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: clamp(24px, 3.5vw, 44px);
    align-items: start;
  }

  .page-faq .rhythm-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 24px;
    border-top: 2px solid var(--hairline-strong);
    padding-top: 28px;
  }

  .page-faq .rhythm-track__node {
    padding-left: 22px;
  }

  .page-faq .rhythm-track__node::before {
    top: -35px;
    left: 0;
    width: 12px;
    height: 12px;
  }

  .page-faq .rhythm-track__node::after {
    display: none;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-main {
    grid-template-columns: 236px minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 76px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-faq .faq-help {
    box-shadow: inset 0 1px 0 var(--hairline-soft);
  }
}

@media (min-width: 1180px) {
  .page-faq .qa summary {
    padding: 18px 22px;
  }

  .page-faq .qa__a {
    padding: 0 22px 22px;
  }
}

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

  .page-faq .faq-index__list a,
  .page-faq .qa,
  .page-faq .term {
    transition: none;
  }
}
<<<END>>>