/* ===== 支持中心 FAQ 页面专属样式 ===== */
.page-faq {
  --faq-accent: var(--c-acc);
  --faq-card-bg: var(--c-card);
  --faq-border: var(--c-border);
  --faq-deep: var(--c-bg-deep);
  --faq-muted: var(--c-text-2);
  --faq-surface: var(--c-surface);
  padding-bottom: 100px;
}

/* 面包屑 */
.page-faq .faq-breadcrumb {
  margin-top: 24px;
}

.page-faq .faq-breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
  color: var(--faq-muted);
}

.page-faq .faq-breadcrumb li {
  display: flex;
  align-items: center;
}

.page-faq .faq-breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--faq-border);
  font-family: var(--f-mono);
}

.page-faq .faq-breadcrumb a {
  color: var(--faq-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.page-faq .faq-breadcrumb [aria-current="page"] {
  color: var(--c-text);
}

/* 首屏 */
.page-faq .faq-hero {
  padding-top: 36px;
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-faq .faq-hero-kicker {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-silver);
  border: 2px solid var(--faq-border);
  background: var(--faq-deep);
  padding: 7px 12px;
  margin-bottom: 18px;
}

.page-faq .faq-h1 {
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-text);
  margin: 0 0 18px;
  position: relative;
}

.page-faq .faq-h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 6px;
  background: var(--faq-accent);
  margin-top: 20px;
}

.page-faq .faq-hero-lead {
  max-width: 560px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-muted);
  margin: 0 0 28px;
}

.page-faq .faq-hero-stats {
  display: flex;
  align-items: center;
  gap: 20px 28px;
  flex-wrap: wrap;
}

.page-faq .faq-hero-stat {
  display: flex;
  flex-direction: column;
  border-left: 3px solid var(--faq-accent);
  padding-left: 14px;
}

.page-faq .faq-hero-stat-num {
  font-family: var(--f-mono);
  font-size: 34px;
  font-weight: 500;
  line-height: 1;
  color: var(--c-text);
}

.page-faq .faq-hero-stat-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--faq-muted);
  margin-top: 6px;
}

.page-faq .faq-hero-cta {
  margin-left: auto;
}

/* 首屏框景 */
.page-faq .faq-hero-frame {
  position: relative;
  border: 3px solid var(--faq-border);
  background:
    linear-gradient(90deg, rgba(42, 59, 76, 0.6) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(0deg, rgba(42, 59, 76, 0.6) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--faq-deep);
  padding: 12px;
  box-shadow: var(--shadow-1);
}

.page-faq .faq-hero-figure {
  margin: 0;
}

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

.page-faq .faq-hero-figcaption {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-silver);
  padding: 10px 4px 2px;
}

/* 角标 */
.page-faq .faq-corner {
  position: absolute;
  width: 18px;
  height: 18px;
  border-color: var(--faq-accent);
  border-style: solid;
  z-index: 2;
}

.page-faq .faq-corner-tl {
  top: -3px;
  left: -3px;
  border-width: 3px 0 0 3px;
}

.page-faq .faq-corner-br {
  bottom: -3px;
  right: -3px;
  border-width: 0 3px 3px 0;
}

/* 主布局 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-top: 56px;
  align-items: start;
}

.page-faq .faq-content {
  min-width: 0;
}

/* 主题地图索引 */
.page-faq .faq-index-inner {
  border: 3px solid var(--faq-border);
  background: var(--faq-deep);
  padding: 22px 16px;
  position: relative;
  box-shadow: var(--shadow-1);
}

.page-faq .faq-index-kicker {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--faq-accent);
  margin-bottom: 8px;
}

.page-faq .faq-index-title {
  font-family: var(--f-head);
  font-weight: 900;
  font-size: 22px;
  color: var(--c-text);
  margin: 0 0 20px;
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--faq-border);
}

.page-faq .faq-index-list li {
  border-bottom: 2px solid var(--faq-border);
}

.page-faq .faq-index-list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 4px;
  color: var(--c-text);
  text-decoration: none;
  font-family: var(--f-head);
  font-weight: 700;
  font-size: 15px;
  transition: background 0.2s ease, color 0.2s ease, padding-left 0.2s ease;
}

.page-faq .faq-index-list a:hover {
  background: var(--faq-card-bg);
  color: var(--faq-accent);
  padding-left: 10px;
}

.page-faq .faq-index-no {
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--faq-accent);
  letter-spacing: 0.06em;
}

.page-faq .faq-index-help {
  font-size: 13px;
  line-height: 1.6;
  color: var(--faq-muted);
  border-left: 3px solid var(--faq-border);
  padding-left: 12px;
  margin: 18px 0 0;
}

/* 章节 */
.page-faq .faq-section {
  margin-bottom: 52px;
}

.page-faq .faq-section-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  border-bottom: 3px solid var(--faq-border);
  padding-bottom: 16px;
  margin-bottom: 10px;
}

.page-faq .faq-section-num {
  font-family: var(--f-mono);
  font-size: 38px;
  font-weight: 500;
  line-height: 1;
  color: var(--faq-accent);
  flex-shrink: 0;
}

.page-faq .faq-section-label {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--faq-muted);
  margin-top: 4px;
}

.page-faq .faq-section-title {
  font-family: var(--f-head);
  font-weight: 900;
  font-size: 25px;
  line-height: 1.15;
  color: var(--c-text);
  margin: 2px 0 0;
}

.page-faq .faq-section-lead {
  font-size: 15px;
  line-height: 1.65;
  color: var(--faq-muted);
  margin: 0 0 24px;
}

/* 问答列表 */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-faq .faq-item {
  border: 3px solid var(--faq-border);
  background: var(--faq-card-bg);
  box-shadow: var(--shadow-1);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-faq .faq-item[open] {
  border-color: var(--faq-accent);
  background: var(--faq-deep);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 52px 18px 18px;
  position: relative;
}

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

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: -4px;
}

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--f-mono);
  font-size: 26px;
  font-weight: 400;
  line-height: 1;
  color: var(--faq-accent);
}

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

.page-faq .faq-item-no {
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--faq-accent);
  border: 2px solid var(--faq-border);
  background: var(--faq-deep);
  padding: 5px 8px;
  line-height: 1;
  white-space: nowrap;
  transition: background 0.25s ease, color 0.25s ease;
}

.page-faq .faq-item[open] .faq-item-no {
  background: var(--faq-accent);
  color: var(--faq-deep);
  border-color: var(--faq-accent);
}

.page-faq .faq-item-q {
  font-family: var(--f-head);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.45;
  color: var(--c-text);
}

.page-faq .faq-item-a {
  border-top: 2px solid var(--faq-border);
  margin: 0 16px 18px;
  padding-top: 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--faq-muted);
}

.page-faq .faq-item-a p {
  margin: 0 0 12px;
}

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

.page-faq .faq-text-action {
  margin-top: 8px;
}

/* 流程示意图 */
.page-faq .faq-flow-figure {
  margin: 20px 0 16px;
  border: 3px solid var(--faq-border);
  background: var(--c-bg);
  padding: 10px;
}

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

.page-faq .faq-flow-figure figcaption {
  padding-top: 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-silver);
}

/* 联系卡片 */
.page-faq .faq-contact-card {
  border: 3px solid var(--faq-border);
  background: var(--faq-surface);
  color: var(--faq-deep);
  padding: 24px;
  margin-top: 32px;
  box-shadow: var(--shadow-1);
  position: relative;
}

.page-faq .faq-contact-card::before {
  content: "";
  position: absolute;
  top: -3px;
  left: -3px;
  width: 64px;
  height: 8px;
  background: var(--faq-accent);
}

.page-faq .faq-contact-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.page-faq .faq-contact-glyph {
  width: 42px;
  height: 42px;
  border: 3px solid var(--faq-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  background: var(--faq-surface);
}

.page-faq .faq-contact-title {
  font-family: var(--f-head);
  font-weight: 900;
  font-size: 18px;
  color: var(--faq-deep);
}

.page-faq .faq-contact-list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.page-faq .faq-contact-list li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(42, 59, 76, 0.5);
  font-size: 15px;
  color: var(--faq-deep);
  line-height: 1.5;
}

.page-faq .faq-contact-label {
  display: inline-block;
  min-width: 68px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-acc-dark);
}

.page-faq .faq-contact-action {
  width: 100%;
}

/* 窄屏微调 */
@media (max-width: 360px) {
  .page-faq .faq-item summary {
    flex-wrap: wrap;
    gap: 8px;
  }
}

/* 平板与桌面 */
@media (min-width: 640px) {
  .page-faq .faq-hero-stats {
    gap: 32px;
  }
}

@media (min-width: 992px) {
  .page-faq .faq-hero {
    padding-top: 60px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    align-items: center;
  }

  .page-faq .faq-hero-frame {
    padding: 16px;
    margin-top: 48px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 280px 1fr;
    gap: 56px;
    margin-top: 72px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 110px;
    display: block;
  }

  .page-faq .faq-section {
    margin-bottom: 64px;
  }

  .page-faq .faq-section-num {
    font-size: 46px;
  }

  .page-faq .faq-section-title {
    font-size: 29px;
  }

  .page-faq .faq-section-head {
    padding-bottom: 20px;
    margin-bottom: 12px;
  }

  .page-faq .faq-section-lead {
    padding-left: 60px;
    margin-bottom: 28px;
  }

  .page-faq .faq-item summary {
    padding: 20px 64px 20px 22px;
    gap: 16px;
  }

  .page-faq .faq-item-no {
    font-size: 13px;
    padding: 6px 10px;
  }

  .page-faq .faq-item-q {
    font-size: 17px;
  }

  .page-faq .faq-item-a {
    margin: 0 24px 24px 76px;
    padding-top: 18px;
  }

  .page-faq .faq-contact-card {
    padding: 28px;
  }
}