/* =====================
   FAQ 页面专属样式
   作用域：.page-faq
   ===================== */
.page-faq {
  --faq-num-size: clamp(36px, 4vw, 56px);
  --faq-panel-gap: 16px;
  --faq-answer-max: 760px;
  background: var(--bg-deep);
  overflow-x: hidden;
}

.page-faq .site-container {
  width: min(100% - 32px, var(--container-max));
  margin-inline: auto;
}

/* ============ 顶部 Hero ============ */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-height) + 48px) 0 48px;
}

.page-faq .faq-hero::before {
  content: "FAQ";
  position: absolute;
  top: 120px;
  right: -30px;
  font-family: var(--font-mono);
  font-size: clamp(80px, 14vw, 160px);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.04);
  line-height: 1;
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: calc(var(--header-height) + 28px);
  left: -16px;
  width: 96px;
  height: 10px;
  background: linear-gradient(90deg, var(--accent-primary), transparent);
  transform: skewX(var(--skew));
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 32px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__content {
  max-width: 680px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  line-height: 1.25;
  margin: 16px 0 16px;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero__lead {
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 24px;
  font-size: 15px;
}

.page-faq .faq-hero__lead strong {
  color: var(--text-primary);
  font-weight: 500;
}

.page-faq .faq-hero__meta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.02);
}

.page-faq .faq-hero__meta-text {
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--line-subtle);
  position: relative;
}

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

/* ============ 面包屑 ============ */
.page-faq .site-breadcrumb {
  margin-bottom: 32px;
  font-size: var(--fs-caption);
  color: var(--text-secondary);
  position: relative;
  z-index: 2;
}

.page-faq .site-breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .site-breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-secondary);
  opacity: 0.5;
}

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

.page-faq .site-breadcrumb a:hover {
  color: var(--accent-primary);
}

/* ============ FAQ 索引区块 ============ */
.page-faq .faq-index {
  padding: 40px 0 56px;
  position: relative;
}

.page-faq .faq-index__head {
  max-width: 640px;
  margin-bottom: 40px;
}

.page-faq .faq-index__head h2 {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  line-height: 1.3;
  margin: 12px 0 12px;
}

.page-faq .faq-index__head p {
  color: var(--text-secondary);
  line-height: 1.75;
  font-size: 15px;
}

/* ============ 手风琴容器 ============ */
.page-faq .faq-accordion {
  display: grid;
  gap: var(--faq-panel-gap);
}

.page-faq .faq-accordion__item {
  background: var(--bg-panel);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-faq .faq-accordion__item[open] {
  border-color: rgba(0, 229, 255, 0.35);
  box-shadow: 0 0 0 1px rgba(0, 229, 255, 0.1);
}

/* ============ 手风琴摘要区 ============ */
.page-faq .faq-accordion__summary {
  list-style: none;
  cursor: pointer;
  padding: 20px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  position: relative;
  transition: background 0.2s ease;
}

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

.page-faq .faq-accordion__summary:hover {
  background: rgba(255, 255, 255, 0.02);
}

.page-faq .faq-accordion__item[open] .faq-accordion__summary::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-electric), rgba(0, 229, 255, 0.15), transparent);
}

.page-faq .faq-accordion__number {
  font-family: var(--font-mono);
  font-size: var(--faq-num-size);
  font-weight: 700;
  color: var(--text-secondary);
  line-height: 1;
  transition: color 0.25s ease;
  white-space: nowrap;
}

.page-faq .faq-accordion__item[open] .faq-accordion__number {
  color: var(--accent-primary);
}

.page-faq .faq-accordion__question {
  font-size: var(--fs-h3);
  font-weight: 500;
  line-height: 1.55;
  color: var(--text-primary);
}

/* 指标 */
.page-faq .faq-accordion__indicator {
  width: 24px;
  height: 24px;
  position: relative;
  flex-shrink: 0;
}

.page-faq .faq-accordion__indicator::before,
.page-faq .faq-accordion__indicator::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 2px;
  background: var(--text-secondary);
  transform: translate(-50%, -50%);
  transition: background 0.25s ease, transform 0.25s ease;
}

.page-faq .faq-accordion__indicator::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-accordion__item[open] .faq-accordion__indicator::before {
  background: var(--accent-electric);
}

.page-faq .faq-accordion__item[open] .faq-accordion__indicator::after {
  transform: translate(-50%, -50%) rotate(0deg);
  background: var(--accent-electric);
}

/* ============ 手风琴正文 ============ */
.page-faq .faq-accordion__body {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows 0.3s ease, opacity 0.25s ease;
}

.page-faq .faq-accordion__item[open] .faq-accordion__body {
  grid-template-rows: 1fr;
  opacity: 1;
}

.page-faq .faq-accordion__inner {
  overflow: hidden;
  min-height: 0;
  padding: 0 20px;
  max-width: var(--faq-answer-max);
}

.page-faq .faq-accordion__inner > *:first-child {
  margin-top: 20px;
}

.page-faq .faq-accordion__inner > *:last-child {
  margin-bottom: 28px;
}

.page-faq .faq-accordion__inner p {
  color: var(--text-secondary);
  line-height: 1.85;
  font-size: 15px;
  margin: 0 0 16px;
}

.page-faq .faq-accordion__lead {
  font-size: 15px;
}

/* ============ 步骤列表（橙色圆点） ============ */
.page-faq .faq-steps {
  list-style: none;
  margin: 16px 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 24px;
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 15px;
}

.page-faq .faq-steps li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.8em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-primary);
  transform: translateY(-50%);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.15);
}

/* ============ 提示框 ============ */
.page-faq .faq-note {
  display: flex;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(0, 229, 255, 0.05);
  border-left: 3px solid var(--accent-electric);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0 0;
}

.page-faq .faq-note__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--data-success);
  margin-top: 8px;
  flex-shrink: 0;
  box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.15);
}

.page-faq .faq-note p {
  margin: 0 !important;
  font-size: 13px !important;
  color: var(--text-secondary) !important;
  line-height: 1.7;
}

/* ============ 缓存示意图片 ============ */
.page-faq .faq-cache-figure {
  margin: 24px 0 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-subtle);
  background: var(--bg-deep);
}

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

.page-faq .faq-cache-figure figcaption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  color: var(--text-secondary);
  border-top: 1px solid var(--line-subtle);
  letter-spacing: 0.02em;
}

/* ============ 延伸阅读 ============ */
.page-faq .faq-more {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid var(--line-subtle);
}

.page-faq .faq-more__intro {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  margin: 0 0 20px;
}

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

/* ============ 联系支持 ============ */
.page-faq .faq-contact {
  padding: 32px 0 96px;
}

.page-faq .faq-contact__panel {
  position: relative;
  overflow: hidden;
  background: var(--bg-panel);
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius);
  padding: 40px 24px;
}

.page-faq .faq-contact__panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-electric));
}

.page-faq .faq-contact__panel::after {
  content: "6686";
  position: absolute;
  right: -24px;
  bottom: -36px;
  font-family: var(--font-mono);
  font-size: clamp(80px, 12vw, 160px);
  font-weight: 700;
  color: rgba(255, 255, 255, 0.02);
  line-height: 1;
  pointer-events: none;
}

.page-faq .faq-contact__panel h2 {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  line-height: 1.3;
  margin: 12px 0 12px;
  position: relative;
  z-index: 1;
}

.page-faq .faq-contact__intro {
  color: var(--text-secondary);
  line-height: 1.75;
  font-size: 15px;
  max-width: 560px;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 14px;
  position: relative;
  z-index: 1;
}

.page-faq .faq-contact__card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--line-subtle);
  border-radius: var(--radius-sm);
  text-decoration: none;
  background: rgba(255, 255, 255, 0.015);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .faq-contact__card:hover {
  border-color: rgba(0, 229, 255, 0.45);
  box-shadow: 0 0 0 1px rgba(0, 229, 255, 0.12);
}

.page-faq .faq-contact__label {
  font-family: var(--font-mono);
  font-size: var(--fs-index);
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-faq .faq-contact__value {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
}

.page-faq .faq-contact__direct {
  margin: 24px 0 0;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.page-faq .faq-contact__direct a {
  color: var(--accent-electric);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.3);
  transition: border-color 0.2s ease;
}

.page-faq .faq-contact__direct a:hover {
  border-color: var(--accent-electric);
}

.page-faq .faq-contact__note {
  margin: 16px 0 0;
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
  font-family: var(--font-mono);
  position: relative;
  z-index: 1;
}

/* ============ 反馈按钮 ============ */
.page-faq .faq-contact__feedback {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--line-subtle);
  position: relative;
  z-index: 1;
}

.page-faq .faq-contact__feedback-label {
  color: var(--text-secondary);
  font-size: 14px;
  margin-right: 4px;
}

.page-faq .faq-contact__feedback-btn {
  border: 1px solid var(--accent-primary);
  background: var(--accent-primary);
  color: #fff;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}

.page-faq .faq-contact__feedback-btn:hover {
  background: #e85c26;
}

.page-faq .faq-contact__feedback-btn:active {
  transform: translateY(1px);
}

.page-faq .faq-contact__feedback-btn--ghost {
  background: transparent;
  color: var(--accent-primary);
  border-color: rgba(255, 107, 53, 0.4);
}

.page-faq .faq-contact__feedback-btn--ghost:hover {
  background: rgba(255, 107, 53, 0.08);
  border-color: var(--accent-primary);
}

/* ============ 桌面端适配 ============ */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-height) + 72px) 0 72px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
  }

  .page-faq .faq-hero__lead {
    font-size: 16px;
  }

  .page-faq .faq-index {
    padding: 56px 0 80px;
  }

  .page-faq .faq-accordion__summary {
    padding: 28px 32px;
    gap: 24px;
  }

  .page-faq .faq-accordion__inner {
    padding: 0 32px;
  }

  .page-faq .faq-contact {
    padding: 48px 0 112px;
  }

  .page-faq .faq-contact__panel {
    padding: 48px 40px;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-contact__card {
    padding: 20px 24px;
  }
}

/* 大桌面宽度时收紧手风琴横向宽度 */
@media (min-width: 1024px) {
  .page-faq .faq-accordion {
    max-width: var(--container-max);
  }

  .page-faq .faq-accordion__item {
    max-width: 920px;
  }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-accordion__body,
  .page-faq .faq-accordion__number,
  .page-faq .faq-accordion__indicator::before,
  .page-faq .faq-accordion__indicator::after {
    transition: none;
  }
}