/* ===== 使用指南 / page-faq ===== */

.page-faq {
  --faq-block: clamp(56px, 8vw, 112px);
  --faq-card: var(--ink-800);
  --faq-edge: rgba(201, 214, 240, .14);
  --faq-accent-soft: rgba(242, 194, 48, .42);
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(64px, 9vw, 132px) 0 clamp(40px, 6vw, 72px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -16%;
  width: 68vw;
  height: 68vw;
  max-width: 720px;
  max-height: 720px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(242, 194, 48, .16) 0%, rgba(242, 194, 48, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: min(46vw, 520px);
  height: 1px;
  background: linear-gradient(90deg, var(--accent), rgba(242, 194, 48, 0));
  opacity: .7;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
}

.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-faq .faq-crumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color .12s var(--ease);
}

.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--accent);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 5.4vw, 58px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 20em;
}

.page-faq .faq-hero__lead {
  margin: 0 0 32px;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--faq-edge);
  display: grid;
  gap: 18px;
}

.page-faq .faq-hero__meta li {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-faq .faq-hero__meta .num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero__meta-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 通用章节标题 ---------- */

.page-faq .faq-section__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-section__lead {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 三分钟上手路径 ---------- */

.page-faq .faq-path {
  padding: clamp(24px, 4vw, 48px) 0 var(--faq-block);
}

.page-faq .path-steps {
  list-style: none;
  margin: clamp(36px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  gap: 28px;
}

.page-faq .path-step {
  padding-top: 26px;
  border-top: 1px solid var(--faq-edge);
}

.page-faq .path-step__num {
  display: block;
  margin-bottom: 18px;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(52px, 8vw, 96px);
  line-height: .86;
  letter-spacing: -0.03em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.page-faq .path-step__title {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-faq .path-step__desc {
  margin: 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 图形容器 ---------- */

.page-faq .faq-figure {
  position: relative;
  margin: clamp(36px, 5vw, 64px) 0 0;
  border: 1px solid var(--faq-edge);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-800);
}

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

.page-faq .faq-figure__cap {
  position: absolute;
  right: 14px;
  bottom: 14px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--faq-edge);
  background: rgba(10, 20, 48, .76);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ice);
}

/* ---------- 问答主体 ---------- */

.page-faq .faq-body {
  padding: var(--faq-block) 0 calc(var(--faq-block) * .8);
  background:
    linear-gradient(180deg, rgba(16, 30, 66, .55), rgba(10, 20, 48, 0) 42%),
    radial-gradient(120% 62% at 100% 0%, rgba(46, 107, 230, .10), rgba(10, 20, 48, 0) 62%);
}

.page-faq .faq-layout {
  display: grid;
  gap: 36px;
}

/* ---------- 目录 ---------- */

.page-faq .faq-toc {
  align-self: start;
}

.page-faq .faq-toc__title {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--faq-edge);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color .12s var(--ease), background-color .12s var(--ease), border-color .12s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--paper);
  background: var(--faq-card);
  border-color: var(--faq-accent-soft);
}

.page-faq .faq-toc__idx {
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

/* ---------- 问题分组 ---------- */

.page-faq .faq-group {
  margin-bottom: clamp(48px, 7vw, 96px);
  scroll-margin-top: 96px;
}

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

.page-faq .faq-group__head {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--faq-edge);
}

.page-faq .faq-group__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
}

/* ---------- 问答卡片 ---------- */

.page-faq .qa-list {
  margin: 28px 0 0;
  display: grid;
  gap: 14px;
}

.page-faq .qa {
  overflow: hidden;
  background: var(--faq-card);
  border: 1px solid var(--faq-edge);
  border-radius: var(--radius);
  transition: border-color .12s var(--ease), background-color .12s var(--ease);
}

.page-faq .qa:hover {
  border-color: rgba(201, 214, 240, .3);
}

.page-faq .qa[open] {
  border-color: var(--faq-accent-soft);
  background: linear-gradient(180deg, rgba(27, 47, 94, .55), rgba(16, 30, 66, .95));
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 22px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  -webkit-tap-highlight-color: transparent;
  transition: color .12s var(--ease);
}

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

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

.page-faq .qa__q::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 22px;
  font-weight: 600;
  line-height: 1;
  color: var(--accent);
  transition: color .12s var(--ease);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
}

.page-faq .qa__a {
  padding: 16px 22px 22px;
  border-top: 1px solid var(--faq-edge);
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
}

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

.page-faq .qa__a strong {
  color: var(--paper);
  font-weight: 600;
}

.page-faq .qa__a a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 194, 48, .45);
  transition: border-color .12s var(--ease);
}

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  border-bottom-color: var(--accent);
}

/* ---------- 兜底联系面板 ---------- */

.page-faq .help-panel {
  margin-top: 28px;
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid var(--faq-edge);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(242, 194, 48, .14), rgba(16, 30, 66, .92) 58%),
    var(--ink-800);
  display: grid;
  gap: 22px;
}

.page-faq .help-panel__text {
  margin: 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .help-panel__text strong {
  color: var(--paper);
  font-weight: 600;
}

.page-faq .help-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .help-note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .help-note a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 194, 48, .45);
  transition: border-color .12s var(--ease);
}

.page-faq .help-note a:hover,
.page-faq .help-note a:focus-visible {
  border-bottom-color: var(--accent);
}

/* ---------- 中屏 ---------- */

@media (min-width: 560px) {
  .page-faq .faq-hero__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 720px) {
  .page-faq .qa-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 20px;
  }

  .page-faq .qa-list > .qa:nth-child(even) {
    margin-top: 44px;
  }
}

@media (min-width: 860px) {
  .page-faq .path-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .path-step:nth-child(2) {
    margin-top: 32px;
  }

  .page-faq .path-step:nth-child(3) {
    margin-top: 64px;
  }

  .page-faq .help-panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 40px;
  }
}

/* ---------- 桌面端 ---------- */

@media (min-width: 980px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: clamp(40px, 6vw, 88px);
    align-items: end;
  }

  .page-faq .faq-hero__lead {
    margin-bottom: 36px;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(48px, 6vw, 88px);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 48px;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-toc__link {
    padding: 10px 12px;
    border-radius: var(--radius);
    border-color: transparent;
    white-space: normal;
  }

  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    background: var(--faq-card);
    border-color: var(--faq-edge);
  }
}

@media (min-width: 1280px) {
  .page-faq .qa-list {
    gap: 22px 28px;
  }
}

/* ---------- 减弱动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .qa__q::after,
  .page-faq .faq-toc__link,
  .page-faq .faq-crumb a {
    transition: none;
  }
}