.page-faq {
  --faq-line-soft: rgba(168, 227, 221, 0.16);
  --faq-panel-bg: rgba(18, 35, 74, 0.72);
  --faq-rule: rgba(27, 34, 48, 0.14);
  background: var(--ink-night);
  color: var(--text-body);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(16px, 3vw, 28px) 0 clamp(32px, 5vw, 64px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -12% auto -12%;
  height: 94%;
  background:
    linear-gradient(152deg, rgba(49, 183, 176, 0.26) 0%, rgba(10, 23, 51, 0) 56%),
    linear-gradient(24deg, rgba(255, 123, 63, 0.16) 0%, rgba(10, 23, 51, 0) 48%);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 0 100%);
  z-index: -1;
}

.page-faq .faq-hero__top {
  display: grid;
  gap: clamp(20px, 4vw, 44px);
  align-items: end;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-sans);
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text-strong);
  max-width: 13em;
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 30em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.7;
  color: var(--text-body);
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--faq-line-soft);
  background: var(--ink-rail);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ---------- 首屏快捷三问 ---------- */
.page-faq .faq-quick {
  list-style: none;
  margin: clamp(24px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-quick__link {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 18px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius-md);
  background: rgba(18, 35, 74, 0.62);
  color: var(--text-strong);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.55;
  transition: border-color var(--ease), background var(--ease), transform var(--ease);
}

.page-faq .faq-quick__link:hover,
.page-faq .faq-quick__link:focus-visible {
  border-color: var(--lake);
  background: rgba(49, 183, 176, 0.14);
  transform: translateY(-2px);
}

.page-faq .faq-quick__link:focus-visible {
  outline: 2px solid var(--lake-soft);
  outline-offset: 3px;
}

.page-faq .faq-quick__num {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--signal);
}

.page-faq .faq-quick__text {
  flex: 1 1 auto;
}

.page-faq .faq-quick__link::after {
  content: "→";
  flex: none;
  font-family: var(--font-mono);
  color: var(--lake-soft);
  transition: transform var(--ease);
}

.page-faq .faq-quick__link:hover::after {
  transform: translateX(3px);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  padding: clamp(28px, 5vw, 56px) 0 clamp(36px, 6vw, 76px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  align-items: start;
}

/* ---------- 左侧状态面板 ---------- */
.page-faq .faq-rail {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-rail__panel {
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(18, 35, 74, 0.88), rgba(10, 23, 51, 0.9));
  padding: 20px;
}

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--haze);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-body);
  text-decoration: none;
  font-size: 15px;
  transition: background var(--ease), color var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: rgba(49, 183, 176, 0.14);
  color: var(--text-strong);
}

.page-faq .faq-rail__link:focus-visible {
  outline: 2px solid var(--lake);
  outline-offset: 2px;
}

.page-faq .faq-lamp {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lake);
  box-shadow: 0 0 0 3px rgba(49, 183, 176, 0.16);
}

.page-faq .faq-lamp--signal {
  background: var(--signal);
  box-shadow: 0 0 0 3px rgba(255, 123, 63, 0.2);
}

.page-faq .faq-rail__status {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line-soft);
}

.page-faq .faq-rail__status-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--haze);
}

.page-faq .faq-rail__status-value {
  margin: 6px 0 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--signal);
}

.page-faq .faq-rail__status-note {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--haze);
}

.page-faq .faq-rail__cta {
  justify-content: center;
  text-align: center;
}

/* ---------- 右侧问答纸面 ---------- */
.page-faq .faq-sheet {
  background: var(--paper);
  color: var(--graphite);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3.4vw, 40px);
  box-shadow: 0 26px 60px -42px rgba(0, 0, 0, 0.9);
}

.page-faq .faq-sheet__title {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--graphite);
}

.page-faq .faq-sheet__sub {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--graphite);
  opacity: 0.66;
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 4px;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(27, 34, 48, 0.2);
  background: rgba(255, 255, 255, 0.5);
  color: var(--graphite);
  font-size: 14px;
  text-decoration: none;
  transition: border-color var(--ease), background var(--ease), color var(--ease);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  border-color: var(--lake);
  background: #ffffff;
}

.page-faq .faq-chip:focus-visible {
  outline: 2px solid var(--lake);
  outline-offset: 2px;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  margin-top: clamp(26px, 3.6vw, 44px);
  scroll-margin-top: 128px;
}

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 4px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--graphite);
}

.page-faq .faq-group__title .num {
  font-size: 13px;
  letter-spacing: 0.08em;
  opacity: 0.45;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule);
  scroll-margin-top: 128px;
}

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--graphite);
  transition: color var(--ease);
}

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

.page-faq .faq-item summary:hover {
  text-decoration: underline;
  text-decoration-color: var(--lake);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--lake);
  outline-offset: 4px;
  border-radius: 6px;
}

.page-faq .faq-item summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.4;
  color: rgba(27, 34, 48, 0.42);
  transition: color var(--ease), transform var(--ease);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
  color: var(--graphite);
}

.page-faq .faq-answer {
  max-width: 62ch;
  padding: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
  opacity: 0.82;
}

.page-faq .faq-answer p {
  margin: 0;
}

.page-faq .faq-answer a {
  color: var(--graphite);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--lake);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color var(--ease);
}

.page-faq .faq-answer a:hover {
  color: var(--ink-rail);
}

.page-faq .faq-group__media {
  margin: 20px 0 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(27, 34, 48, 0.12);
}

.page-faq .faq-group__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact {
  padding: clamp(32px, 5vw, 64px) 0 clamp(36px, 5vw, 72px);
  background: linear-gradient(180deg, rgba(18, 35, 74, 0.58), rgba(10, 23, 51, 0));
}

.page-faq .faq-contact__inner {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-faq .faq-contact__title {
  margin: 10px 0 0;
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text-strong);
}

.page-faq .faq-contact__text {
  margin: 12px 0 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-body);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-contact__item {
  display: grid;
  gap: 4px;
  padding: 15px 18px;
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--radius-md);
  background: rgba(18, 35, 74, 0.7);
}

.page-faq .faq-contact__label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--haze);
}

.page-faq .faq-contact__value {
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 600;
  color: var(--text-strong);
  text-decoration: none;
  word-break: break-word;
  transition: color var(--ease);
}

.page-faq .faq-contact__value:hover,
.page-faq .faq-contact__value:focus-visible {
  color: var(--lake-soft);
}

.page-faq .faq-contact__value--plain {
  font-weight: 500;
  color: var(--text-body);
}

/* ---------- 底部去向 ---------- */
.page-faq .faq-next {
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-faq .faq-next__inner {
  display: grid;
  gap: 16px;
  align-items: center;
}

.page-faq .faq-next__title {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 22px);
  letter-spacing: -0.01em;
  color: var(--text-strong);
}

.page-faq .faq-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-faq .faq-hero__top {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-faq .faq-quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact__inner {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-faq .faq-next__inner {
    grid-template-columns: auto 1fr;
  }

  .page-faq .faq-next__links {
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__grid {
    grid-template-columns: minmax(0, 262px) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 48px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-chips {
    position: sticky;
    top: 84px;
    z-index: 2;
    margin-top: 10px;
    padding: 10px 0;
    background: linear-gradient(180deg, var(--paper) 74%, rgba(242, 233, 219, 0));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__link,
  .page-faq .faq-quick__link::after,
  .page-faq .faq-rail__link,
  .page-faq .faq-chip,
  .page-faq .faq-contact__value,
  .page-faq .faq-item summary::after {
    transition: none;
  }

  .page-faq .faq-quick__link:hover {
    transform: none;
  }
}