/* ===== 页面：support / 常见问题与安装帮助 ===== */
.page-faq {
  background: var(--c-primary-900);
  color: var(--c-neutral-100);
  overflow-x: hidden;
}

/* 首屏 */
.page-faq__hero {
  position: relative;
  padding: 40px 0 56px;
  background:
    radial-gradient(circle at 78% 16%, rgba(96, 165, 250, 0.18), transparent 32%),
    linear-gradient(140deg, var(--c-primary-900) 0%, var(--c-primary-700) 100%);
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(96, 165, 250, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(96, 165, 250, 0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  top: -30%;
  right: -4%;
  width: 42%;
  height: 150%;
  background: linear-gradient(135deg, rgba(251, 191, 36, 0.28), rgba(251, 191, 36, 0) 70%);
  clip-path: polygon(18% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-faq__hero-inner {
  position: relative;
  z-index: 1;
}

.page-faq__breadcrumb {
  margin-bottom: 28px;
}

.page-faq h1 {
  font-family: var(--font-heading);
  font-style: italic;
  font-weight: 800;
  font-size: clamp(28px, 5vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 12px 0 16px;
  max-width: 860px;
}

.page-faq .section-kicker {
  color: var(--c-yellow);
  margin: 0;
}

.page-faq__lead {
  font-size: 16px;
  line-height: 1.8;
  max-width: 780px;
  color: var(--c-neutral-200);
}

.page-faq__hero-tags,
.page-faq__hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-faq__hero-links a {
  text-decoration: none;
}

/* 章节标题 */
.page-faq .section-title {
  font-family: var(--font-heading);
  font-style: italic;
  font-weight: 800;
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.2;
  margin: 10px 0 8px;
  color: var(--c-neutral-100);
}

.page-faq .section-lead {
  margin: 0;
  max-width: 760px;
  color: var(--c-neutral-200);
}

.page-faq__section-head {
  max-width: 820px;
  margin-bottom: 28px;
}

/* 快速问答手风琴 */
.page-faq__acc-wrap {
  display: grid;
  gap: 30px;
}

.page-faq__acc-group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--c-yellow);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-faq__acc-group-title::after {
  content: "";
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, rgba(96, 165, 250, 0.4), transparent);
}

.page-faq__acc-item {
  display: block;
  background: linear-gradient(135deg, rgba(23, 42, 69, 0.95), rgba(10, 25, 47, 0.98));
  border: 1px solid rgba(96, 165, 250, 0.16);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  margin-bottom: 12px;
}

.page-faq__acc-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.4;
  color: var(--c-neutral-100);
}

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

.page-faq__acc-item summary::before {
  content: "";
  width: 6px;
  height: 24px;
  flex-shrink: 0;
  background: var(--c-yellow);
  clip-path: polygon(0 0, 100% 20%, 100% 80%, 0 100%);
}

.page-faq__acc-item summary::after {
  content: "+";
  margin-left: auto;
  font-size: 22px;
  font-weight: 800;
  color: var(--c-yellow);
}

.page-faq__acc-item[open] summary::after {
  content: "−";
}

.page-faq__acc-body {
  padding: 2px 24px 22px 42px;
  color: var(--c-neutral-200);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq__acc-body p {
  margin: 0 0 12px;
}

.page-faq__acc-body .btn {
  margin-top: 4px;
}

/* 排查路径 */
.page-faq__troubleshoot {
  background: linear-gradient(180deg, var(--c-primary-700), rgba(10, 25, 47, 0.92));
  border-block: 1px solid rgba(96, 165, 250, 0.12);
}

.page-faq__flow {
  list-style: none;
  margin: 0 0 36px;
  padding: 0;
}

.page-faq__flow-item {
  margin: 0;
}

.page-faq__flow-step {
  background: rgba(10, 25, 47, 0.72);
  border: 1px solid rgba(96, 165, 250, 0.18);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 16px 100%, 0 calc(100% - 16px));
}

.page-faq__flow-step summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 48px 1fr;
  column-gap: 14px;
  row-gap: 6px;
  padding: 20px 22px;
}

.page-faq__flow-step summary::-webkit-details-marker {
  display: none;
}

.page-faq__flow-num {
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--c-yellow);
  color: var(--c-primary-900);
  font-weight: 800;
  font-size: 15px;
  clip-path: polygon(0 0, 100% 0, 100% 75%, 75% 100%, 0 100%);
}

.page-faq__flow-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  color: var(--c-neutral-100);
}

.page-faq__flow-desc {
  font-size: 13px;
  color: var(--c-neutral-200);
}

.page-faq__flow-more {
  padding: 0 22px 20px 84px;
  color: var(--c-neutral-200);
  font-size: 14px;
  line-height: 1.7;
}

.page-faq__flow-more p {
  margin: 0;
}

.page-faq__flow-arrow {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px 0;
  color: var(--c-yellow);
}

.page-faq__flow-arrow svg {
  width: 24px;
  height: 24px;
}

.page-faq__flow-figure,
.page-faq__checklist-figure {
  margin: 40px 0 0;
}

.page-faq__flow-figure img,
.page-faq__checklist-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid rgba(96, 165, 250, 0.2);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.3);
}

.page-faq__flow-figure figcaption,
.page-faq__checklist-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--c-neutral-200);
}

/* 苹果端核对清单 */
.page-faq__checklist {
  background: radial-gradient(circle at 12% 30%, rgba(13, 148, 136, 0.16), transparent 26%), var(--c-primary-900);
}

.page-faq__checklist-grid {
  display: grid;
  gap: 40px;
}

.page-faq__checklist-items {
  display: grid;
  gap: 12px;
}

.page-faq__check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  background: rgba(23, 42, 69, 0.75);
  border: 1px solid rgba(96, 165, 250, 0.14);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-faq__check-item:hover {
  background: rgba(23, 42, 69, 0.92);
  border-color: rgba(251, 191, 36, 0.4);
}

.page-faq__check-item input {
  appearance: none;
  -webkit-appearance: none;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 2px solid rgba(96, 165, 250, 0.55);
  background: rgba(10, 25, 47, 0.7);
  clip-path: polygon(0 0, 100% 0, 100% 75%, 75% 100%, 0 100%);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.page-faq__check-item input:checked {
  background: var(--c-yellow);
  border-color: var(--c-yellow);
}

.page-faq__checklist-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* 数据面板切换指引 */
.page-faq__panel-guide {
  background: linear-gradient(180deg, var(--c-primary-900), var(--c-primary-700) 120%);
  border-block: 1px solid rgba(96, 165, 250, 0.12);
}

.page-faq__panel-steps {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 28px;
}

.page-faq__panel-step {
  position: relative;
  padding: 26px 26px 22px 34px;
  background: linear-gradient(135deg, rgba(10, 25, 47, 0.9), rgba(23, 42, 69, 0.85));
  border: 1px solid rgba(96, 165, 250, 0.14);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-faq__panel-num {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 34px;
  margin-bottom: 12px;
  background: var(--c-yellow);
  color: var(--c-primary-900);
  font-weight: 800;
  font-size: 14px;
  clip-path: polygon(0 0, 100% 0, 90% 100%, 10% 100%);
}

.page-faq__panel-step h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--c-neutral-100);
}

.page-faq__panel-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-neutral-200);
}

.page-faq__panel-arrow {
  width: 28px;
  height: 24px;
  align-self: center;
  color: var(--c-yellow);
}

/* 联系客服后备方案 */
.page-faq__contact {
  background: radial-gradient(circle at 85% 70%, rgba(251, 191, 36, 0.1), transparent 28%), var(--c-primary-900);
}

.page-faq__contact-grid {
  display: grid;
  gap: 16px;
}

.page-faq__contact-card {
  padding: 22px;
}

.page-faq__contact-card .panel__title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  margin: 0 0 10px;
  color: var(--c-yellow);
}

.page-faq__contact-line {
  font-size: 16px;
  margin: 0 0 6px;
}

.page-faq__contact-line a {
  color: var(--c-yellow);
  font-weight: 700;
  text-decoration: none;
}

.page-faq__contact-note {
  font-size: 13px;
  color: var(--c-neutral-200);
  margin: 0;
}

.page-faq__contact-addr {
  margin: 28px 0 0;
  text-align: center;
  font-size: 14px;
  color: var(--c-neutral-200);
}

.page-faq__contact-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
}

/* 动效减弱 */
@media (prefers-reduced-motion: reduce) {
  .page-faq .page-faq__check-item,
  .page-faq .page-faq__check-item input,
  .page-faq details summary {
    transition: none;
  }
}

/* 桌面端布局 */
@media (min-width: 900px) {
  .page-faq__hero {
    padding: 52px 0 72px;
  }

  .page-faq__acc-wrap {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
    gap: 20px;
  }

  .page-faq__flow {
    display: flex;
    align-items: stretch;
    gap: 10px;
    margin-bottom: 44px;
  }

  .page-faq__flow-item {
    flex: 1 1 150px;
  }

  .page-faq__flow-arrow {
    flex: 0 0 auto;
    transform: rotate(-90deg);
    padding: 0;
  }

  .page-faq__flow-figure img {
    max-width: 820px;
  }

  .page-faq__checklist-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 48px;
  }

  .page-faq__checklist-figure {
    margin: 0;
  }

  .page-faq__panel-steps {
    flex-direction: row;
    align-items: stretch;
  }

  .page-faq__panel-step {
    flex: 1;
  }

  .page-faq__panel-arrow {
    transform: rotate(-90deg);
    align-self: center;
  }

  .page-faq__contact-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}