.page-faq {
  --faq-qa-line: rgba(56, 242, 195, 0.42);
  --faq-track: rgba(20, 58, 78, 0.9);
  color: var(--text);
}

.page-faq .breadcrumb {
  padding-top: clamp(14px, 2.4vw, 22px);
  color: var(--muted);
  font-size: var(--step--1);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover {
  color: var(--mint);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5vw, 58px) 0 clamp(26px, 4vw, 46px);
}

.page-faq .faq-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 0 98%);
}

.page-faq .faq-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 10%, rgba(56, 242, 195, 0.2), transparent 56%),
    linear-gradient(168deg, rgba(4, 18, 31, 0.86), rgba(2, 10, 18, 0.99) 76%);
}

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

.page-faq .faq-hero h1 {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 7.4vw, 4.4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 19ch;
}

.page-faq .faq-hero__lede {
  max-width: 46ch;
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-hero__lede::first-line {
  color: var(--mint-soft);
}

/* ---------- 提问热度 ---------- */

.page-faq .faq-heat-wrap {
  padding: clamp(10px, 2vw, 20px) 0 clamp(30px, 5vw, 56px);
}

.page-faq .faq-heat__title {
  margin: 0 0 16px;
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-heat {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-heat__item {
  display: grid;
  grid-template-columns: 5.6em minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  font-size: var(--step--1);
}

.page-faq .faq-heat__name {
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-heat__track {
  display: block;
  height: 6px;
  border-radius: 99px;
  background: var(--faq-track);
  overflow: hidden;
}

.page-faq .faq-heat__bar {
  display: block;
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--mint), var(--mint-soft));
}

.page-faq .faq-heat__bar--1 { width: 92%; }
.page-faq .faq-heat__bar--2 { width: 74%; }
.page-faq .faq-heat__bar--3 { width: 58%; }
.page-faq .faq-heat__bar--4 { width: 40%; background: linear-gradient(90deg, var(--coral), var(--sand)); }

/* ---------- 主题切换 ---------- */

.page-faq .faq-board {
  padding-bottom: clamp(44px, 7vw, 92px);
}

.page-faq .faq-tablist {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 14px 11px;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: var(--step-0);
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-faq .faq-tab:hover {
  color: var(--mint-soft);
}

.page-faq .faq-tab[aria-selected="true"] {
  color: var(--mint);
  border-bottom-color: var(--mint);
  background: linear-gradient(180deg, rgba(56, 242, 195, 0), rgba(56, 242, 195, 0.1));
}

.page-faq .faq-tab:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
  border-radius: 4px;
}

.page-faq .faq-tab__num {
  font-size: var(--step--1);
  color: var(--sand);
}

.page-faq .faq-panels {
  padding-top: clamp(20px, 3.4vw, 34px);
}

.page-faq .faq-panel[hidden] {
  display: none;
}

.page-faq .faq-panel + .faq-panel {
  margin-top: 40px;
}

.page-faq .faq-panel:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 8px;
  border-radius: 6px;
}

.page-faq .faq-panel__lede {
  max-width: 40ch;
  margin: 0 0 18px;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--mint-soft);
}

/* ---------- 问答条目 ---------- */

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

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

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  font-size: var(--step-1);
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}

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

.page-faq .qa summary::marker {
  content: "";
}

.page-faq .qa summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  padding-top: 0.16em;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--mint);
}

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

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

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

.page-faq .qa__num {
  flex: 0 0 auto;
  min-width: 2.8em;
  padding-top: 0.32em;
  font-size: var(--step--1);
  color: var(--sand);
}

.page-faq .qa__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__body {
  margin: 0 0 20px 8px;
  padding: 2px 2px 2px 18px;
  border-left: 2px solid var(--faq-qa-line);
}

.page-faq .qa__body p {
  max-width: 38em;
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.78;
  color: var(--text);
}

.page-faq .qa__body a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 195, 0.4);
}

.page-faq .qa__body a:hover {
  color: var(--mint-soft);
  border-bottom-color: var(--mint-soft);
}

/* ---------- 章节配图 ---------- */

.page-faq .faq-flow {
  margin: clamp(24px, 4vw, 36px) 0 4px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 92%);
}

.page-faq .faq-flow img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

.page-faq .faq-flow .media__cap {
  font-size: var(--step--1);
  color: var(--muted);
  line-height: 1.7;
  margin-top: 12px;
}

/* ---------- 联系我们 ---------- */

.page-faq .faq-contact {
  padding-bottom: clamp(52px, 8vw, 110px);
}

.page-faq .faq-contact__panel {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4.4vw, 48px);
  background: linear-gradient(150deg, var(--lane), rgba(4, 18, 31, 0.96));
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 0, 100% 94%, 0 100%);
}

.page-faq .faq-contact__panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(180deg, var(--coral), var(--violet));
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 24px;
}

.page-faq .faq-contact h2 {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-size: var(--step-2);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  max-width: 18ch;
}

.page-faq .faq-contact__lede {
  max-width: 40ch;
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.78;
  color: var(--muted);
}

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

.page-faq .faq-contact__row {
  display: grid;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-contact__label {
  font-size: var(--step--1);
  color: var(--sand);
  letter-spacing: 0.04em;
}

.page-faq .faq-contact__value {
  margin: 0;
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.page-faq .faq-contact__cta {
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 768px) {
  .page-faq .faq-heat {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 32px;
  }

  .page-faq .faq-heat__item {
    grid-template-columns: 7em minmax(0, 1fr);
  }

  .page-faq .faq-tab {
    padding: 14px 22px 13px;
  }

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

@media (min-width: 1024px) {
  .page-faq .faq-hero {
    padding-top: clamp(48px, 5vw, 76px);
  }

  .page-faq .faq-hero h1 {
    max-width: 16ch;
  }

  .page-faq .faq-hero__lede {
    font-size: var(--step-1);
    max-width: 48ch;
  }

  .page-faq .faq-tablist {
    position: sticky;
    top: var(--topbar-h);
    z-index: 4;
    background: var(--abyss);
    padding-top: 8px;
  }

  .page-faq .faq-panels {
    padding-top: clamp(26px, 3vw, 40px);
  }

  .page-faq .qa summary {
    padding: 20px 2px;
  }

  .page-faq .qa__body {
    padding-left: 24px;
    margin-left: 14px;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tab {
    transition: none;
  }
}