.page-faq {
  --faq-grid-size: 28px;
  --faq-grid: linear-gradient(rgba(26, 58, 102, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 58, 102, 0.22) 1px, transparent 1px);
  color: var(--color-text);
}

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

.page-faq__container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: clamp(24px, 4vw, 56px);
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
  font-size: 14px;
  color: var(--color-muted);
}

.page-faq .breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

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

/* 页面头部 */
.page-faq__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-bottom: 56px;
  padding: 28px 24px;
  border: 2px solid var(--color-border);
  background: var(--faq-grid), var(--color-deep);
  background-size: var(--faq-grid-size) var(--faq-grid-size), auto;
  position: relative;
}

.page-faq__head::after {
  content: "";
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 120px;
  height: 10px;
  background: var(--color-orange);
}

.page-faq__head-copy {
  min-width: 0;
}

.page-faq .page-head__kicker {
  color: var(--color-neon);
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 10px;
}

.page-faq .page-head__title {
  font-family: var(--font-display);
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.08;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 0 0 16px;
}

.page-faq .page-head__lead {
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-muted);
  max-width: 58ch;
  margin: 0;
}

.page-faq__head-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.page-faq__head-tags a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.page-faq__head-tags a::before {
  content: "";
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  background: var(--color-neon);
}

.page-faq__head-tags a:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
  background: rgba(17, 43, 85, 0.8);
}

.page-faq__head-figure {
  position: relative;
  margin: 0;
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 rgba(255, 107, 53, 0.14);
  align-self: center;
  max-width: 560px;
}

.page-faq__head-figure::before {
  content: "FAQ";
  position: absolute;
  top: -2px;
  left: -2px;
  z-index: 1;
  background: var(--color-neon);
  color: var(--color-deep);
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 4px 10px;
}

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

.page-faq__head-figure figcaption {
  padding: 12px 14px;
  border-top: 2px solid var(--color-border);
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.5;
}

/* 主布局 */
.page-faq__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

/* 索引侧栏 */
.page-faq__side {
  min-width: 0;
}

.page-faq__side-card {
  position: relative;
  border: 2px solid var(--color-border);
  background: var(--color-deep);
  padding: 24px 20px 20px;
  overflow: hidden;
}

.page-faq__side-card::before {
  content: "";
  position: absolute;
  left: -2px;
  bottom: -2px;
  width: 20px;
  height: 20px;
  border-left: 4px solid var(--color-neon);
  border-bottom: 4px solid var(--color-neon);
}

.page-faq__side-card::after {
  content: "";
  position: absolute;
  right: -2px;
  top: -2px;
  width: 26px;
  height: 26px;
  border-top: 4px solid var(--color-orange);
  border-right: 4px solid var(--color-orange);
}

.page-faq__side-label {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-orange);
  margin: 0 0 16px;
}

.page-faq__side-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq__side-list .index-list__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 12px 12px;
  border: 1px solid var(--color-border);
  background: rgba(17, 43, 85, 0.55);
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  line-height: 1.3;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.page-faq__side-list .index-list__link:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
  background: var(--color-surface);
}

.page-faq__side-note {
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  padding: 20px;
  margin-top: 16px;
  font-size: 15px;
}

.page-faq__side-note p {
  margin: 0 0 12px;
  color: var(--color-text);
  font-weight: 600;
}

.page-faq__side-note .button {
  width: 100%;
  margin-bottom: 10px;
}

.page-faq__side-note-meta {
  color: var(--color-muted);
  font-size: 13px !important;
  font-weight: 400 !important;
  margin: 0 !important;
}

/* 主内容区 */
.page-faq__main {
  min-width: 0;
  padding: 32px 24px;
  border: 2px solid var(--color-border);
  background: var(--faq-grid), var(--color-deep);
  background-size: var(--faq-grid-size) var(--faq-grid-size), auto;
  position: relative;
}

/* 分区标题 */
.page-faq__section {
  margin-bottom: 64px;
  position: relative;
}

.page-faq__section:last-of-type {
  margin-bottom: 40px;
}

.page-faq__section-head {
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 2px solid var(--color-border);
  padding-bottom: 14px;
  position: relative;
}

.page-faq__section-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 120px;
  height: 4px;
  background: var(--color-neon);
}

.page-faq__section-num {
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: 34px;
  line-height: 1;
  color: var(--color-deep);
  background: var(--color-orange);
  border: 2px solid var(--color-orange);
  padding: 8px 12px;
}

.page-faq__section-kicker {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-neon);
  margin: 0 0 4px;
}

.page-faq__section-title {
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 30px);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0;
}

.page-faq__section-desc {
  color: var(--color-muted);
  font-size: 16px;
  line-height: 1.6;
  margin: 14px 0 24px;
}

/* 登录与设备双栏 */
.page-faq__duo {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.page-faq__duo-main {
  min-width: 0;
}

/* 手风琴 */
.page-faq__item {
  border: 2px solid var(--color-border);
  background: rgba(17, 43, 85, 0.45);
  margin-bottom: 14px;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-faq__item[open] {
  border-color: var(--color-orange);
  background: var(--color-deep);
}

.page-faq__item-q {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 14px;
  user-select: none;
}

.page-faq__item-q::-webkit-details-marker {
  display: none;
}

.page-faq__item-q:focus-visible {
  outline: 2px solid var(--color-orange);
  outline-offset: -2px;
}

.page-faq__item-num {
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  padding: 2px 7px;
  transition: color 0.2s, border-color 0.2s;
}

.page-faq__item[open] .page-faq__item-num {
  color: var(--color-neon);
  border-color: var(--color-neon);
}

.page-faq__item-text {
  flex: 1;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.45;
  transition: color 0.2s;
}

.page-faq__item-q:hover .page-faq__item-text {
  color: var(--color-orange);
}

.page-faq__item-icon {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  border-right: 2px solid var(--color-orange);
  border-bottom: 2px solid var(--color-orange);
  transform: rotate(45deg);
  transition: transform 0.3s ease;
}

.page-faq__item[open] .page-faq__item-icon {
  transform: rotate(225deg);
}

.page-faq__item-a {
  padding: 0 16px 18px 52px;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq__item-a p {
  margin: 0 0 10px;
}

.page-faq__item-a p:last-child {
  margin-bottom: 0;
}

.page-faq__item-link {
  margin-top: 14px;
}

.page-faq__item-link .button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  font-size: 14px;
}

/* 登录流程图 */
.page-faq__login-figure {
  margin: 0;
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 rgba(255, 107, 53, 0.12);
  align-self: start;
  max-width: 560px;
  width: 100%;
}

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

.page-faq__login-figure figcaption {
  padding: 12px 14px;
  border-top: 2px solid var(--color-border);
  font-size: 13px;
  color: var(--color-muted);
}

/* 底部说明 */
.page-faq__footnote {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 8px;
  padding: 22px 24px;
  border: 2px solid var(--color-border);
  border-left: 6px solid var(--color-neon);
  background: rgba(17, 43, 85, 0.5);
}

.page-faq__footnote p {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.6;
  max-width: 720px;
}

.page-faq__footnote a {
  color: var(--color-neon);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s, color 0.2s;
  white-space: nowrap;
}

.page-faq__footnote a:hover {
  border-color: var(--color-neon);
  color: var(--color-text);
}

/* 平板：侧栏变为四列 */
@media (min-width: 720px) {
  .page-faq__side-list {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq__duo {
    grid-template-columns: minmax(0, 1fr) 280px;
  }
}

/* 桌面端 */
@media (min-width: 960px) {
  .page-faq__head {
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: center;
    gap: 40px;
    padding: 36px 40px;
  }

  .page-faq__layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq__side-card {
    position: sticky;
    top: 24px;
  }

  .page-faq__side-list {
    grid-template-columns: 1fr;
  }

  .page-faq__main {
    padding: 44px 40px;
  }

  .page-faq__section-head {
    gap: 20px;
  }

  .page-faq__section-num {
    font-size: 44px;
    padding: 10px 16px;
  }

  .page-faq__item-q {
    padding: 20px 20px;
  }

  .page-faq__item-a {
    padding: 0 20px 22px 60px;
  }
}