/* ===== 帮助中心 /tutorial/ ===== */
.page-faq {
  --faq-hair: rgba(34, 51, 59, .7);
  --faq-soft: rgba(34, 51, 59, .45);
  --faq-block-gap: clamp(52px, 8vw, 104px);
  position: relative;
  display: block;
}

.page-faq .faq-crumb-wrap {
  padding-top: clamp(18px, 3vw, 32px);
}

.page-faq .faq-crumb-wrap .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-crumb-wrap .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--c-line);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(26px, 4vw, 48px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -24%;
  right: -12%;
  width: min(620px, 78vw);
  height: min(620px, 78vw);
  background: radial-gradient(circle, rgba(0, 240, 255, .15), rgba(0, 240, 255, 0) 68%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 5vw, 48px);
  align-items: end;
}

.page-faq .faq-h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7vw, 74px);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--c-ink);
}

.page-faq .faq-hl {
  font-style: normal;
  color: var(--c-cyan);
}

.page-faq .faq-lede {
  max-width: 38em;
  margin: 20px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--c-muted);
}

.page-faq .faq-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick a {
  display: inline-flex;
  align-items: center;
  padding: 7px 15px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  background: rgba(12, 17, 22, .72);
  font-size: 13px;
  color: var(--c-ink);
  text-decoration: none;
  transition: border-color .25s var(--ease-out), color .25s var(--ease-out), transform .25s var(--ease-out);
}

.page-faq .faq-quick a:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
  transform: translateY(-2px);
}

.page-faq .faq-hero-media {
  position: relative;
  margin: 0;
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
}

.page-faq .faq-hero-media img,
.page-faq .faq-flow-media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 区块通用 ---------- */
.page-faq .faq-block {
  padding-top: var(--faq-block-gap);
}

.page-faq .faq-head {
  max-width: 44em;
}

.page-faq .faq-head-note,
.page-faq .faq-aside-note {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-faq .faq-flow-media {
  margin: clamp(24px, 4vw, 40px) 0 0;
  aspect-ratio: 2 / 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
}

/* ---------- 三步路径 ---------- */
.page-faq .step-path {
  display: grid;
  gap: 16px;
  margin-top: clamp(26px, 4vw, 46px);
  position: relative;
}

.page-faq .step-node {
  position: relative;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(168deg, rgba(22, 29, 37, .94), rgba(12, 17, 22, .82));
  overflow: hidden;
  transition: border-color .3s var(--ease-out), box-shadow .3s var(--ease-out);
}

.page-faq .step-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--c-cyan);
  opacity: .35;
  transition: opacity .3s var(--ease-out);
}

.page-faq .step-node[open] {
  border-color: rgba(0, 240, 255, .42);
  box-shadow: 0 22px 48px -34px rgba(0, 240, 255, .75);
}

.page-faq .step-node[open]::before {
  opacity: .95;
}

.page-faq .step-summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .step-index {
  font-size: clamp(26px, 4.6vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .06em;
  color: var(--c-cyan);
}

.page-faq .step-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(16px, 2vw, 20px);
  color: var(--c-ink);
}

.page-faq .step-body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--faq-soft);
}

.page-faq .step-body p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--c-muted);
}

.page-faq .step-body .step-tip {
  padding: 10px 14px;
  border-left: 2px solid var(--c-yellow);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(255, 212, 0, .06);
  font-size: 14px;
  color: rgba(234, 246, 248, .84);
}

/* ---------- 折叠箭头（步骤 + 问答共用） ---------- */
.page-faq .step-chev,
.page-faq .qa-chev {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-left: auto;
}

.page-faq .step-chev::before,
.page-faq .step-chev::after,
.page-faq .qa-chev::before,
.page-faq .qa-chev::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  background: var(--c-muted);
  transform: translateY(-50%);
  transition: transform .3s var(--ease-out), background .3s var(--ease-out);
}

.page-faq .step-chev::after,
.page-faq .qa-chev::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .step-node[open] .step-chev::before,
.page-faq .step-node[open] .step-chev::after,
.page-faq .qa-item[open] .qa-chev::before,
.page-faq .qa-item[open] .qa-chev::after {
  background: var(--c-cyan);
}

.page-faq .step-node[open] .step-chev::after,
.page-faq .qa-item[open] .qa-chev::after {
  transform: translateY(-50%) rotate(0deg);
}

/* ---------- 不对称双栏 ---------- */
.page-faq .qa-layout {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

/* ---------- 同步面板 ---------- */
.page-faq .sync-panel {
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(12, 17, 22, .92), rgba(5, 7, 10, .86));
}

.page-faq .sync-row {
  padding: 16px 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .sync-row:first-child {
  padding-top: 0;
}

.page-faq .sync-row--last {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .sync-key {
  display: block;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-cyan);
}

.page-faq .sync-val {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-muted);
}

/* ---------- 问答列表 ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--c-line);
}

.page-faq .qa-item {
  border-bottom: 1px solid var(--c-line);
}

.page-faq .qa-q {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 17px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15px, 1.7vw, 17.5px);
  line-height: 1.6;
  color: var(--c-ink);
  transition: color .25s var(--ease-out);
}

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

.page-faq .qa-q:hover {
  color: var(--c-cyan);
}

.page-faq .qa-a {
  padding: 0 2px 18px;
}

.page-faq .qa-a p {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-muted);
}

/* ---------- 联系支持 ---------- */
.page-faq .support-card {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  padding: clamp(22px, 4vw, 42px);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(0, 240, 255, .1), rgba(0, 240, 255, 0) 62%),
    linear-gradient(180deg, rgba(16, 22, 28, .95), rgba(5, 7, 10, .92));
}

.page-faq .support-lede {
  max-width: 36em;
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--c-muted);
}

.page-faq .support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 0;
}

.page-faq .support-contact {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--faq-hair);
}

.page-faq .support-contact .contact-row {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .support-contact .contact-row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .support-contact .contact-key {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-muted);
}

.page-faq .support-contact .contact-val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-ink);
  overflow-wrap: anywhere;
}

.page-faq .support-contact .contact-val a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 240, 255, .4);
  transition: color .25s var(--ease-out), border-color .25s var(--ease-out);
}

.page-faq .support-contact .contact-val a:hover {
  color: var(--c-cyan);
  border-color: var(--c-cyan);
}

/* ---------- 中屏 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero-media {
    aspect-ratio: 16 / 10;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: 7fr 5fr;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .qa-layout {
    grid-template-columns: 4fr 8fr;
    gap: clamp(28px, 4vw, 60px);
  }

  .page-faq .qa-aside {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }

  .page-faq .step-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(16px, 2.2vw, 30px);
    align-items: start;
  }

  .page-faq .step-path > .step-node:nth-child(2) {
    margin-top: clamp(38px, 5vw, 76px);
  }

  .page-faq .step-path > .step-node:nth-child(3) {
    margin-top: clamp(76px, 10vw, 152px);
  }

  .page-faq .support-card {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-faq .support-contact {
    border-top: 0;
    padding-left: clamp(20px, 3vw, 36px);
    border-left: 1px solid var(--faq-hair);
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1280px) {
  .page-faq .faq-h1 {
    letter-spacing: -.028em;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick a,
  .page-faq .step-node,
  .page-faq .step-node::before,
  .page-faq .step-chev::before,
  .page-faq .step-chev::after,
  .page-faq .qa-chev::before,
  .page-faq .qa-chev::after,
  .page-faq .qa-q,
  .page-faq .support-contact .contact-val a {
    transition: none;
  }

  .page-faq .faq-quick a:hover {
    transform: none;
  }
}
</main>