/* ============================================================
   支持中心 /support/  —— 页面作用域 .page-faq
   ============================================================ */

.page-faq {
  --faq-teal: var(--spark-400);
  --faq-gold: var(--gold-400);
  --faq-hi: rgba(52, 228, 214, .09);
  --faq-hi-soft: rgba(52, 228, 214, .05);
  color: var(--text-2);
}

/* ---------- 面包屑与首屏 ---------- */

.page-faq .breadcrumb {
  padding-top: clamp(84px, 11vw, 122px);
}

.page-faq .faq-hero::after {
  content: "";
  display: block;
  margin-top: clamp(30px, 5vw, 56px);
  height: 1px;
  background: linear-gradient(90deg, var(--faq-teal) 0%, rgba(52, 228, 214, .18) 38%, transparent 72%);
}

.page-faq .faq-hero__title {
  margin: 20px 0 0;
  font-size: clamp(34px, 6.4vw, 72px);
  line-height: 1.08;
  letter-spacing: -.025em;
  font-weight: 800;
  color: var(--text-1);
}

.page-faq .faq-hero__lede {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.85;
  color: var(--text-2);
}

/* ---------- 区块标题头 ---------- */

.page-faq .faq-sec-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px 16px;
  align-items: start;
  border-top: 1px solid var(--hairline);
  padding-top: 18px;
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-faq .faq-sec-head__idx {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--faq-teal);
  padding-top: .5em;
}

.page-faq .faq-sec-head__title {
  margin: 0;
  font-size: clamp(23px, 3.2vw, 38px);
  line-height: 1.2;
  letter-spacing: -.015em;
  font-weight: 800;
  color: var(--text-1);
}

.page-faq .faq-sec-head__note {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-3);
}

/* ---------- 档位切换 ---------- */

.page-faq .tier-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-faq .tier-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
  pointer-events: none;
}

.page-faq .tier-switch__label {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  font-size: var(--fs-14);
  color: var(--text-2);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .tier-switch__label:hover {
  border-color: var(--hairline-strong);
  color: var(--text-1);
}

.page-faq .tier-switch__input:checked + .tier-switch__label {
  border-color: var(--faq-teal);
  color: var(--faq-teal);
  background: var(--faq-hi);
}

.page-faq .tier-switch__input:focus-visible + .tier-switch__label {
  outline: 2px solid var(--faq-teal);
  outline-offset: 2px;
}

/* ---------- 权益对比表 ---------- */

.page-faq .benefit-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-faq .benefit-table {
  width: 100%;
  min-width: 700px;
  border-collapse: collapse;
  font-size: var(--fs-14);
}

.page-faq .benefit-table th,
.page-faq .benefit-table td {
  text-align: left;
  padding: 15px 18px;
  border-bottom: 1px solid var(--hairline-soft);
  vertical-align: top;
  line-height: 1.6;
}

.page-faq .benefit-table tbody tr:last-child th,
.page-faq .benefit-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .benefit-table thead th {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  font-weight: 500;
  color: var(--text-3);
  background: var(--abyss-950);
  border-bottom: 1px solid var(--hairline);
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}

.page-faq .benefit-table thead th.t-std { color: var(--text-2); }
.page-faq .benefit-table thead th.t-prem { color: var(--gold-400); }

.page-faq .benefit-table__corner {
  color: var(--text-3);
}

.page-faq .benefit-table tbody th {
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--abyss-950);
  color: var(--text-1);
  font-weight: 600;
  white-space: nowrap;
}

.page-faq .benefit-table tbody td {
  color: var(--text-2);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .benefit-table td.bcell--off {
  color: var(--text-3);
  text-decoration: line-through;
  text-decoration-color: rgba(126, 150, 170, .6);
  text-decoration-thickness: 1px;
}

/* 档位高亮 */

.page-faq:has(#tier-basic:checked) .bcell.t-basic,
.page-faq:has(#tier-std:checked) .bcell.t-std,
.page-faq:has(#tier-prem:checked) .bcell.t-prem {
  background: var(--faq-hi);
  color: var(--text-1);
}

.page-faq:has(#tier-basic:checked) thead .t-basic,
.page-faq:has(#tier-std:checked) thead .t-std,
.page-faq:has(#tier-prem:checked) thead .t-prem {
  color: var(--faq-teal);
}

/* ---------- 表格补充图 ---------- */

.page-faq .faq-figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
}

.page-faq .faq-figure__media {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-figure .media__caption {
  margin-top: 12px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--text-3);
}

/* ---------- 问答区 ---------- */

.page-faq .faq-q {
  border-top: 1px solid var(--hairline-soft);
}

.page-faq .faq-group {
  margin-bottom: clamp(30px, 5vw, 52px);
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline);
}

.page-faq .faq-group__idx {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--faq-gold);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(18px, 2vw, 23px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text-1);
}

.page-faq .faq-group__en {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--text-3);
}

.page-faq .faq-list {
  border-top: 1px solid var(--hairline-soft);
  margin-top: -1px;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--hairline-soft);
  transition: box-shadow var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  box-shadow: inset 1px 0 0 0 var(--faq-teal);
  background: var(--faq-hi-soft);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 17px 18px 17px 16px;
  list-style: none;
  cursor: pointer;
  font-size: var(--fs-16);
  font-weight: 500;
  line-height: 1.6;
  color: var(--text-1);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--faq-teal);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--faq-teal);
  outline-offset: -2px;
}

.page-faq .faq-item__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--text-3);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--faq-teal);
}

.page-faq .faq-item__a {
  padding: 0 18px 20px 62px;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-2);
  animation: faqReveal 240ms var(--ease);
}

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

.page-faq .faq-item__a a {
  color: var(--faq-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@keyframes faqReveal {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: none; }
}

.page-faq .faq-more {
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding-left: 16px;
  border-left: 1px solid var(--hairline);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-3);
}

.page-faq .faq-more a {
  color: var(--faq-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 反馈流程 ---------- */

.page-faq .faq-flow__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 0 0 22px 46px;
  border-left: 1px solid var(--hairline);
}

.page-faq .faq-step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-faq .faq-step__n {
  position: absolute;
  left: 0;
  top: 1px;
  width: 30px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--faq-gold);
}

.page-faq .faq-step__title {
  margin: 0 0 6px;
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--text-1);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-2);
}

.page-faq .faq-flow__figure {
  margin: 0;
}

.page-faq .faq-flow__media {
  aspect-ratio: 2 / 1;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-flow__figure .media__caption {
  margin-top: 12px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--text-3);
}

/* ---------- 人工协助 ---------- */

.page-faq .faq-help__box {
  display: grid;
  gap: 26px;
  padding: clamp(26px, 4vw, 44px);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(52, 228, 214, .10) 0%, transparent 58%),
    var(--abyss-900);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-help__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .18em;
  color: var(--faq-teal);
}

.page-faq .faq-help__title {
  margin: 14px 0 0;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.22;
  letter-spacing: -.015em;
  font-weight: 800;
  color: var(--text-1);
}

.page-faq .faq-help__text {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--text-2);
}

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

/* ============================================================
   响应式
   ============================================================ */

@media (min-width: 768px) {
  .page-faq .faq-flow__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-faq .faq-help__box {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 40px;
  }

  .page-faq .faq-help__actions {
    flex-direction: column;
    align-items: stretch;
    min-width: 220px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-sec-head {
    gap: 14px 28px;
  }

  .page-faq .faq-item__q {
    padding-left: 22px;
    padding-right: 24px;
  }

  .page-faq .faq-item__a {
    padding-left: 74px;
    padding-right: 24px;
  }
}

/* ---------- 窄屏：表格转纵向卡片 ---------- */

@media (max-width: 760px) {
  .page-faq .benefit-wrap {
    overflow: visible;
    border-bottom: 0;
  }

  .page-faq .benefit-table {
    display: block;
    min-width: 0;
    font-size: var(--fs-14);
  }

  .page-faq .benefit-table thead {
    display: none;
  }

  .page-faq .benefit-table tbody {
    display: block;
  }

  .page-faq .benefit-table tbody tr {
    display: block;
    border: 1px solid var(--hairline);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
  }

  .page-faq .benefit-table tbody th {
    position: static;
    display: block;
    background: transparent;
    border-bottom: 0;
    padding: 13px 16px 8px;
    font-family: var(--font-mono);
    font-size: var(--fs-12);
    letter-spacing: .1em;
    font-weight: 500;
    color: var(--faq-gold);
    white-space: normal;
  }

  .page-faq .benefit-table tbody td {
    display: block;
    border-bottom: 0;
    padding: 7px 16px;
  }

  .page-faq .benefit-table tbody td:last-child {
    padding-bottom: 14px;
  }

  .page-faq .benefit-table tbody td::before {
    content: attr(data-label);
    display: block;
    margin-bottom: 2px;
    font-family: var(--font-mono);
    font-size: var(--fs-12);
    letter-spacing: .1em;
    color: var(--text-3);
  }

  .page-faq .faq-item__a {
    padding-left: 46px;
    padding-right: 16px;
  }

  .page-faq .faq-group__en {
    display: none;
  }
}

/* ---------- 减少动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .tier-switch__label,
  .page-faq .faq-item__q,
  .page-faq .faq-item__num,
  .page-faq .benefit-table tbody td,
  .page-faq .benefit-table thead th {
    transition: none;
  }
}