/* ============================================================
   帮助中心 / page-faq
   ============================================================ */

.page-faq {
  --faq-line-soft: rgba(42, 53, 102, .75);
  --faq-glow: 0 0 18px rgba(53, 230, 224, .3);
  position: relative;
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding: 26px 0 0;
}

.page-faq .breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-faq .breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-faq .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--c-line);
}

.page-faq .breadcrumb-item a {
  color: var(--c-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .breadcrumb-item a:hover,
.page-faq .breadcrumb-item a:focus-visible {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

.page-faq .breadcrumb-item[aria-current] {
  color: var(--c-cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(44px, 7vw, 76px) clamp(36px, 6vw, 64px);
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: 20px;
  max-width: 64rem;
}

.page-faq .faq-h1 {
  margin: 0;
  font-size: clamp(2.05rem, 7.2vw, 4.8rem);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -.015em;
  color: var(--c-white);
  text-shadow: 0 0 26px rgba(53, 230, 224, .18);
}

.page-faq .faq-lead {
  max-width: 62ch;
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--c-text);
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

/* ---------- 四步路径 ---------- */
.page-faq .faq-path {
  padding-block: clamp(36px, 6vw, 64px);
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-track {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-node {
  position: relative;
  z-index: 1;
}

.page-faq .faq-node-link {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
  padding: 22px 20px 20px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-left: 2px solid var(--c-line);
  color: var(--c-text);
  text-decoration: none;
  transition: transform .25s var(--ease),
              border-color .25s var(--ease),
              box-shadow .25s var(--ease);
}

.page-faq .faq-node-link:hover,
.page-faq .faq-node-link:focus-visible {
  transform: translateY(-4px);
  border-color: var(--c-cyan);
  border-left-color: var(--c-cyan);
  box-shadow: 0 0 0 1px var(--c-cyan), 0 18px 40px rgba(0, 0, 0, .35);
}

.page-faq .faq-node-index {
  font-size: .7rem;
  letter-spacing: .22em;
  color: var(--c-cyan);
}

.page-faq .faq-node-title {
  font-size: 1.18rem;
  font-weight: 300;
  letter-spacing: .02em;
  color: var(--c-white);
}

.page-faq .faq-node-hint {
  font-size: .84rem;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-faq .faq-path-figure {
  margin: var(--gap) 0 0;
  aspect-ratio: 16 / 7;
}

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

/* ---------- 通用区块 ---------- */
.page-faq .faq-block {
  padding-block: clamp(48px, 7vw, 88px);
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-block--panel {
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(255, 63, 164, .10), transparent 62%),
    linear-gradient(180deg, rgba(19, 26, 63, .85), rgba(10, 15, 44, .4));
}

.page-faq .faq-block .section-head {
  max-width: 64ch;
  margin-bottom: 34px;
}

/* ---------- 折叠问题卡片 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--c-line);
}

.page-faq .step-item {
  position: relative;
  border-bottom: 1px solid var(--c-line);
  transition: background .3s var(--ease);
}

.page-faq .step-item::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: var(--c-cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .3s var(--ease);
}

.page-faq .step-item.is-active {
  background: linear-gradient(90deg, rgba(53, 230, 224, .07), transparent 72%);
}

.page-faq .step-item.is-active::before {
  transform: scaleY(1);
}

.page-faq .step-head {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "index title"
    "hint hint";
  align-items: baseline;
  gap: 6px 14px;
  width: 100%;
  padding: 22px 40px 22px 0;
  background: none;
  border: 0;
  color: var(--c-white);
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: color .2s var(--ease);
}

.page-faq .step-head::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--c-cyan);
  transition: transform .25s var(--ease);
}

.page-faq .step-item.is-active .step-head::after {
  content: "−";
}

.page-faq .step-index {
  grid-area: index;
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--c-cyan);
}

.page-faq .step-title {
  grid-area: title;
  font-size: 1.06rem;
  font-weight: 300;
  letter-spacing: .02em;
  color: var(--c-white);
}

.page-faq .step-hint {
  grid-area: hint;
  font-size: .74rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-faq .step-body {
  max-width: 72ch;
  padding: 0 40px 26px 0;
  color: var(--c-text);
}

.page-faq .step-body > p {
  margin: 0 0 16px;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--c-text);
}

.page-faq .faq-steps {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 12px;
  align-items: start;
  padding: 13px 0;
  border-top: 1px solid var(--faq-line-soft);
  font-size: .93rem;
  line-height: 1.75;
  color: var(--c-text);
}

.page-faq .faq-steps li .mono {
  padding-top: 3px;
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--c-cyan);
}

/* ---------- 设备分栏 ---------- */
.page-faq .faq-split {
  align-items: start;
  gap: var(--gap);
}

.page-faq .faq-split-copy {
  display: grid;
  align-content: start;
  gap: 14px;
}

.page-faq .faq-split-copy .section-head {
  margin-bottom: 0;
}

.page-faq .faq-fix-list {
  display: grid;
  gap: 0;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-fix {
  display: grid;
  justify-items: start;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-fix h3 {
  margin: 0;
  font-size: 1.06rem;
  font-weight: 300;
  letter-spacing: .02em;
  color: var(--c-white);
}

.page-faq .faq-fix p {
  max-width: 58ch;
  margin: 0;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--c-text);
}

.page-faq .faq-device-figure {
  margin: 0;
  aspect-ratio: 10 / 7;
}

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

/* ---------- 四步流程时间线 ---------- */
.page-faq .faq-flow {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-flow-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 24px 0;
  border-bottom: 1px solid var(--c-line);
  transition: background .25s var(--ease);
}

.page-faq .faq-flow-item:hover {
  background: linear-gradient(90deg, rgba(53, 230, 224, .06), transparent 70%);
}

.page-faq .faq-flow-index {
  min-width: 2.4rem;
  padding-top: 4px;
  font-size: .76rem;
  letter-spacing: .16em;
  color: var(--c-cyan);
}

.page-faq .faq-flow-body h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 300;
  letter-spacing: .02em;
  color: var(--c-white);
}

.page-faq .faq-flow-body p {
  max-width: 64ch;
  margin: 0;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--c-text);
}

/* ---------- 规则章节卡片 ---------- */
.page-faq .faq-rule-grid {
  gap: var(--gap);
}

.page-faq .faq-rule-grid .panel {
  border-left: 2px solid var(--c-band);
  transition: border-color .25s var(--ease), transform .25s var(--ease);
}

.page-faq .faq-rule-grid .panel:hover {
  transform: translateY(-4px);
  border-left-color: var(--c-cyan);
}

.page-faq .faq-rule-grid .panel-index {
  color: var(--c-gold);
}

/* ---------- 响应节奏 ---------- */
.page-faq .faq-echo-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-faq .faq-echo-card {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 26px 24px 28px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-left: 2px solid var(--c-cyan);
}

.page-faq .faq-echo-num {
  font-size: clamp(1.25rem, 4vw, 1.55rem);
  font-weight: 300;
  letter-spacing: .02em;
  color: var(--c-cyan);
  text-shadow: var(--faq-glow);
}

.page-faq .faq-echo-card h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 300;
  color: var(--c-white);
}

.page-faq .faq-echo-card p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: var(--c-muted);
}

/* ---------- 升级路径 ---------- */
.page-faq .faq-escalate {
  align-items: start;
  gap: var(--gap);
}

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

.page-faq .faq-contact-card {
  display: grid;
  align-content: start;
  gap: 4px;
  padding: 26px 24px;
  background: linear-gradient(150deg, rgba(27, 42, 107, .92), rgba(19, 26, 63, .96));
  border: 1px solid var(--c-line);
  border-top: 2px solid var(--c-magenta);
}

.page-faq .faq-contact-label {
  margin: 12px 0 0;
  font-size: .68rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-faq .faq-contact-value {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-white);
  word-break: break-all;
}

.page-faq .faq-contact-note {
  margin: 16px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
  font-size: .85rem;
  line-height: 1.78;
  color: var(--c-muted);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-track {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq .faq-track::before {
    content: "";
    position: absolute;
    left: 7%;
    right: 7%;
    top: 34px;
    height: 1px;
    background: linear-gradient(90deg,
      rgba(53, 230, 224, .45),
      rgba(255, 63, 164, .28),
      rgba(53, 230, 224, .45));
    z-index: 0;
  }

  .page-faq .step-head {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "index title hint";
    align-items: center;
    gap: 8px 20px;
    padding: 24px 46px 24px 0;
  }

  .page-faq .step-hint {
    letter-spacing: .16em;
  }

  .page-faq .step-body {
    padding: 0 46px 28px 0;
  }

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

  .page-faq .faq-flow-item {
    grid-template-columns: 4.5rem 1fr;
    gap: 24px;
    padding: 28px 0;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }

  .page-faq .faq-node-link:hover,
  .page-faq .faq-rule-grid .panel:hover {
    transform: none;
  }
}