/* ========== 帮助中心页 .page-faq ========== */
.page-faq {
  --faq-side: 250px;
  --faq-hero-grad: linear-gradient(135deg, #0A1F44 0%, #0d2a5c 62%, #143464 100%);
  background: var(--warm-paper);
  color: var(--ink-700);
}

.page-faq .faq-inner {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 20px;
}

/* 面包屑 */
.page-faq .breadcrumb {
  padding: 0;
  font-family: var(--font-body);
  font-size: .875rem;
  color: rgba(255, 255, 255, .68);
}

.page-faq .breadcrumb a {
  color: rgba(255, 255, 255, .72);
  text-decoration: none;
  transition: color var(--speed-fast) var(--ease);
}

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

.page-faq .breadcrumb-sep {
  margin: 0 8px;
  opacity: .6;
}

.page-faq .breadcrumb-current {
  color: var(--gold);
  font-weight: 600;
}

/* ===== Hero 首屏 ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--faq-hero-grad);
  color: #fff;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, transparent 0%, rgba(255, 215, 0, .07) 48%, transparent 64%),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, .025) 0 1px, transparent 1px 72px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  width: 440px;
  height: 2px;
  top: 22%;
  right: -140px;
  transform: rotate(-8deg);
  pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(255, 215, 0, .65), transparent);
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 20px;
  padding-top: 20px;
  padding-bottom: 34px;
}

.page-faq .faq-hero-inner .breadcrumb {
  margin-bottom: 4px;
}

.page-faq .faq-hero-copy .section-label {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.page-faq .faq-hero-copy h1 {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 6vw, 3.25rem);
  line-height: 1.12;
  letter-spacing: -.03em;
  background: linear-gradient(180deg, #f7f9fc 0%, #dce3ef 55%, #c3cfe2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-faq .faq-hero-copy .page-title-subtitle {
  margin: 0;
  max-width: 620px;
  color: rgba(255, 255, 255, .78);
  font-size: .95rem;
  line-height: 1.7;
}

/* 搜索 */
.page-faq .faq-search {
  position: relative;
  max-width: 560px;
  margin-top: 20px;
}

.page-faq .faq-search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  color: var(--deep-blue);
  pointer-events: none;
}

.page-faq .faq-search-input {
  box-sizing: border-box;
  width: 100%;
  padding: 13px 16px 13px 46px;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--ink-700);
  background: #fff;
  border: 2px solid var(--gold);
  border-radius: 0;
  outline: none;
  transition: box-shadow var(--speed-base) var(--ease), border-color var(--speed-base) var(--ease);
}

.page-faq .faq-search-input:focus {
  border-color: var(--gold-soft);
  box-shadow: 0 0 0 4px rgba(255, 215, 0, .25);
}

.page-faq .faq-hero-hint {
  margin: 14px 0 0;
  font-size: .875rem;
  color: rgba(255, 255, 255, .58);
}

.page-faq .faq-hero-figure {
  margin: 0;
  border: 1px solid rgba(255, 215, 0, .35);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .18);
}

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

/* ===== 数据指标条 ===== */
.page-faq .faq-metrics {
  background: var(--deep-blue);
  border-top: 3px solid var(--gold);
  border-bottom: 3px solid var(--gold);
}

.page-faq .faq-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.page-faq .faq-metric {
  text-align: center;
  padding: 6px 4px;
}

.page-faq .faq-metric-num {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 5vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--gold);
  line-height: 1.2;
}

.page-faq .faq-metric-label {
  display: block;
  margin-top: 4px;
  font-size: .75rem;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .72);
}

/* ===== 两栏布局 ===== */
.page-faq .faq-layout {
  padding-top: 40px;
  padding-bottom: 40px;
}

.page-faq .faq-layout-inner {
  display: grid;
  gap: 28px;
  align-items: start;
}

/* 目录侧栏 */
.page-faq .faq-directory {
  background: var(--paper);
  border: 1px solid var(--line-200);
  padding: 18px 16px;
}

.page-faq .faq-directory-title {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-200);
  font-family: var(--font-heading);
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-500);
}

.page-faq .faq-directory-list,
.page-faq .faq-directory-list ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-directory-list > li {
  font-family: var(--font-heading);
  font-size: .95rem;
  font-weight: 700;
}

.page-faq .faq-directory-list > li + li {
  margin-top: 8px;
}

.page-faq .faq-directory-group {
  display: inline-block;
  padding: 4px 0;
  color: var(--deep-blue);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color var(--speed-fast) var(--ease), color var(--speed-fast) var(--ease);
}

.page-faq .faq-directory-group:hover {
  border-color: var(--gold);
  color: var(--deep-blue);
}

.page-faq .faq-directory-list ul {
  padding: 4px 0 10px 0;
}

.page-faq .faq-directory-list ul a {
  display: block;
  padding: 4px 0 4px 14px;
  border-left: 1px solid var(--line-200);
  color: var(--ink-500);
  font-family: var(--font-body);
  font-size: .875rem;
  font-weight: 400;
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--speed-fast) var(--ease), border-color var(--speed-fast) var(--ease);
}

.page-faq .faq-directory-list ul a:hover {
  color: var(--deep-blue);
  border-left-color: var(--gold);
}

.page-faq .faq-directory-note {
  margin-top: 14px;
  padding: 14px;
  background: var(--blue-100);
  border-left: 3px solid var(--deep-blue);
  font-size: .875rem;
  color: var(--ink-700);
  line-height: 1.6;
}

.page-faq .faq-directory-note-title {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--deep-blue);
}

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

.page-faq .faq-directory-note-link {
  display: inline-block;
  color: var(--deep-blue);
  text-decoration: none;
  font-weight: 700;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 2px;
}

.page-faq .faq-directory-note-link:hover {
  color: var(--deep-blue-2);
  border-color: var(--deep-blue);
}

/* 主问答区 */
.page-faq .faq-group {
  border-top: 2px solid var(--deep-blue);
  padding-top: 18px;
  margin-bottom: 36px;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-faq .faq-group-index {
  font-family: var(--font-heading);
  font-size: 1.55rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--gold);
  background: var(--deep-blue);
  padding: 1px 8px;
}

.page-faq .faq-group h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--ink-700);
}

/* 折叠面板 */
.page-faq .faq-question {
  background: var(--paper);
  border: 1px solid var(--line-200);
  border-left: 4px solid transparent;
  margin-bottom: 12px;
  box-shadow: 0 1px 0 rgba(10, 31, 68, .03);
  transition: border-color var(--speed-base) var(--ease), box-shadow var(--speed-base) var(--ease);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-question[open] {
  border-left-color: var(--gold);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-question summary {
  position: relative;
  padding: 16px 52px 16px 18px;
  list-style: none;
  cursor: pointer;
  user-select: none;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--deep-blue);
}

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

.page-faq .faq-question summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1;
  color: var(--gold);
  transition: transform var(--speed-base) var(--ease);
}

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

.page-faq .faq-answer {
  padding: 2px 18px 18px;
  color: var(--ink-700);
  font-size: .9375rem;
  line-height: 1.75;
}

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

.page-faq .faq-answer p + p {
  margin-top: 10px;
}

.page-faq .faq-answer a {
  color: var(--deep-blue);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 1px;
  transition: color var(--speed-fast) var(--ease), border-color var(--speed-fast) var(--ease);
}

.page-faq .faq-answer a:hover {
  color: var(--deep-blue-2);
  border-color: var(--deep-blue);
}

/* ===== 跨设备提示带 ===== */
.page-faq .faq-device-note {
  background: linear-gradient(135deg, #ffffff 0%, var(--warm-paper) 100%);
  border-top: 1px solid var(--line-200);
  border-bottom: 1px solid var(--line-200);
  padding: 36px 0;
}

.page-faq .faq-device-inner {
  display: grid;
  gap: 22px;
  align-items: center;
}

.page-faq .faq-device-figure {
  margin: 0;
  border: 1px solid var(--line-200);
}

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

.page-faq .faq-device-copy .section-label {
  margin: 0 0 8px;
  color: var(--deep-blue);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.page-faq .faq-device-copy h2 {
  margin: 0 0 10px;
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 2vw, 1.7rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--deep-blue);
}

.page-faq .faq-device-copy p {
  margin: 0;
  color: var(--ink-500);
  line-height: 1.7;
}

.page-faq .faq-device-cta {
  margin-top: 14px;
}

.page-faq .faq-device-cta a {
  font-weight: 700;
  color: var(--deep-blue);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 2px;
  transition: color var(--speed-fast) var(--ease), border-color var(--speed-fast) var(--ease);
}

.page-faq .faq-device-cta a:hover {
  color: var(--deep-blue-2);
  border-color: var(--deep-blue);
}

/* ===== 人工支持 CTA ===== */
.page-faq .faq-support {
  background: var(--deep-blue);
  padding: 42px 0 48px;
  border-top: 3px solid var(--gold);
}

.page-faq .faq-support-inner {
  text-align: center;
}

.page-faq .faq-support .section-label {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.page-faq .faq-support h2 {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: #fff;
}

.page-faq .faq-support p {
  margin: 0 auto;
  max-width: 640px;
  color: rgba(255, 255, 255, .8);
  line-height: 1.7;
}

.page-faq .faq-support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 22px;
}

/* ===== 响应式增强 ===== */
@media (min-width: 640px) {
  .page-faq .faq-metrics-grid {
    gap: 16px;
    padding-top: 20px;
    padding-bottom: 20px;
  }

  .page-faq .faq-hero-figure {
    max-width: 640px;
  }
}

@media (min-width: 768px) {
  .page-faq .faq-device-inner {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 28px;
  }

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

  .page-faq .faq-device-note {
    padding: 44px 0;
  }

  .page-faq .faq-support {
    padding: 52px 0 56px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: 1.05fr 1fr;
    gap: 28px;
    align-items: center;
    padding-top: 32px;
    padding-bottom: 44px;
  }

  .page-faq .faq-hero-inner .breadcrumb {
    grid-column: 1 / -1;
  }

  .page-faq .faq-hero-copy h1 {
    font-size: clamp(2.4rem, 4vw, 3.5rem);
  }

  .page-faq .faq-layout-inner {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
    gap: 40px;
  }

  .page-faq .faq-directory {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-metric-num {
    font-size: clamp(1.5rem, 2.5vw, 2.2rem);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-layout {
    padding-top: 52px;
    padding-bottom: 52px;
  }

  .page-faq .faq-hero-hint {
    font-size: .9rem;
  }
}