.page-faq {
  --faq-panel-gap: clamp(56px, 8vw, 104px);
  --faq-radius: var(--radius);
  color: var(--text);
  padding-bottom: clamp(72px, 10vw, 140px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: calc(var(--header-h) + 26px) var(--pad-x) 0;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--t) var(--ease);
}

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

.page-faq .breadcrumb span:last-child {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(28px, 4vw, 52px) var(--pad-x) clamp(40px, 6vw, 72px);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
}

.page-faq .faq-eyebrow {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.1rem, 5.2vw, 4rem);
  line-height: 1.06;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero-lead {
  max-width: 62ch;
  margin: 0 0 28px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-hero .btn-row {
  margin-bottom: 32px;
}

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

.page-faq .faq-hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(46, 242, 179, 0.05) 0,
    rgba(46, 242, 179, 0.05) 1px,
    transparent 1px,
    transparent 4px
  );
  mix-blend-mode: screen;
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 12 / 7;
}

/* ---------- 首屏数据条 ---------- */
.page-faq .faq-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--line);
  border-radius: var(--faq-radius);
  overflow: hidden;
}

.page-faq .faq-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background: var(--bg);
}

.page-faq .fact-num {
  font-family: var(--font-num);
  font-size: 1.55rem;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .fact-label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

/* ---------- 三步流程条 ---------- */
.page-faq .faq-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: clamp(32px, 4.5vw, 56px);
}

.page-faq .faq-flow-node {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  text-decoration: none;
  color: var(--text);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease),
    background-color var(--t) var(--ease);
}

.page-faq .faq-flow-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18%;
  bottom: 18%;
  width: 2px;
  background: var(--cyan);
  opacity: 0.5;
  transition: opacity var(--t) var(--ease);
}

.page-faq .faq-flow-node:hover,
.page-faq .faq-flow-node:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
}

.page-faq .faq-flow-node:hover::before,
.page-faq .faq-flow-node:focus-visible::before {
  opacity: 1;
}

.page-faq .faq-flow-node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .node-num {
  font-family: var(--font-num);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .node-text {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-faq .node-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.08em;
}

.page-faq .node-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 帮助文档概览 ---------- */
.page-faq .faq-doc-overview {
  max-width: var(--shell);
  margin: 0 auto clamp(48px, 6vw, 84px);
  padding: 0 var(--pad-x);
}

.page-faq .doc-tags {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
}

.page-faq .doc-tag {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: linear-gradient(90deg, rgba(46, 242, 179, 0.06), transparent 70%);
}

.page-faq .doc-tag-name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  letter-spacing: 0.06em;
}

.page-faq .doc-tag-count {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--amber);
  white-space: nowrap;
}

/* ---------- 两栏主体 ---------- */
.page-faq .faq-body {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 4vw, 64px);
  align-items: start;
}

.page-faq .faq-rail {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-faq .rail-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-rail-list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail-list > li {
  flex: 0 0 auto;
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px;
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  color: var(--muted);
  border-left: 2px solid transparent;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease),
    background-color var(--t) var(--ease);
}

.page-faq .faq-rail-link .idx {
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  color: var(--text);
  background: var(--bg-raised);
  border-left-color: var(--cyan);
}

.page-faq .faq-rail-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 章节 ---------- */
.page-faq .faq-panel {
  scroll-margin-top: calc(var(--header-h) + 32px);
}

.page-faq .faq-panel + .faq-panel {
  margin-top: var(--faq-panel-gap);
}

.page-faq .panel-head {
  display: grid;
  gap: 12px;
  padding-bottom: 20px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .panel-kicker {
  margin: 0;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .panel-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
}

.page-faq .panel-lead {
  max-width: 68ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 步骤列表 ---------- */
.page-faq .step-list {
  list-style: none;
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
}

.page-faq .step-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 20px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  transition: border-color var(--t) var(--ease);
}

.page-faq .step-item:hover {
  border-color: var(--line-strong);
}

.page-faq .step-num {
  font-family: var(--font-num);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .step-item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.12rem;
  letter-spacing: 0.06em;
}

.page-faq .step-item p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 误区提示 ---------- */
.page-faq .pitfall {
  margin-top: 26px;
  padding: 18px 22px;
  border-left: 2px solid var(--orange);
  background: linear-gradient(90deg, rgba(255, 106, 31, 0.1), transparent 65%);
}

.page-faq .pitfall-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 0.92rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-faq .pitfall ul {
  margin: 0;
  padding-left: 1.1em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .pitfall li + li {
  margin-top: 6px;
}

/* ---------- 问答条目 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line);
  transition: border-color var(--t) var(--ease);
}

.page-faq .qa[open] {
  border-bottom-color: var(--cyan);
}

.page-faq .qa-q {
  position: relative;
  display: block;
  padding: 20px 40px 20px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16.5px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--text);
  transition: color var(--t) var(--ease);
}

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

.page-faq .qa-q::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--cyan);
  border-bottom: 1.5px solid var(--cyan);
  transform: translateY(-72%) rotate(45deg);
  transition: transform var(--t) var(--ease);
}

.page-faq .qa[open] .qa-q::after {
  transform: translateY(-28%) rotate(-135deg);
}

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

.page-faq .qa-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .qa-a {
  max-width: 74ch;
  padding: 0 0 24px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .qa-a p {
  margin: 0 0 10px;
}

.page-faq .qa-a p:last-child {
  margin-bottom: 0;
}

.page-faq .qa-a ol,
.page-faq .qa-a ul {
  margin: 8px 0 12px;
  padding-left: 1.3em;
}

.page-faq .qa-a li {
  margin-bottom: 6px;
}

.page-faq .qa-a li:last-child {
  margin-bottom: 0;
}

/* ---------- 设备适配 ---------- */
.page-faq .device-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.5vw, 40px);
  margin-top: 28px;
  align-items: start;
}

.page-faq .device-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  overflow: hidden;
  background: var(--bg-raised);
}

.page-faq .device-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 10 / 7;
}

.page-faq .table-scroll {
  overflow-x: auto;
  border-top: 1px solid var(--line-strong);
}

.page-faq .device-table {
  width: 100%;
  min-width: 460px;
  border-collapse: collapse;
  font-size: 15px;
}

.page-faq .device-table th,
.page-faq .device-table td {
  text-align: left;
  vertical-align: top;
  padding: 14px 16px 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .device-table th {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .device-table td {
  color: var(--muted);
  line-height: 1.7;
}

.page-faq .device-table td:first-child {
  white-space: nowrap;
  color: var(--text);
  font-family: var(--font-num);
  font-size: 13.5px;
}

.page-faq .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- 人工协助 ---------- */
.page-faq .support-band {
  margin-top: 26px;
  padding: clamp(24px, 3.6vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--faq-radius);
  background: linear-gradient(145deg, var(--wine), var(--bg-raised) 72%);
}

.page-faq .support-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 12px;
}

.page-faq .support-key {
  min-width: 76px;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .support-mail {
  font-family: var(--font-num);
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
  word-break: break-all;
}

.page-faq .support-mail:hover,
.page-faq .support-mail:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .support-mail:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .support-value {
  font-family: var(--font-num);
  font-size: 1rem;
  color: var(--text);
}

.page-faq .support-tip {
  max-width: 66ch;
  margin: 16px 0 22px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .support-note {
  max-width: 72ch;
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .support-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 242, 179, 0.35);
  transition: border-color var(--t) var(--ease);
}

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

.page-faq .support-note a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .doc-tags {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-faq .doc-tags {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .device-layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    border-top: none;
    border-left: 1px solid var(--line);
    padding: 4px 0 4px 4px;
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-rail-link {
    white-space: normal;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-flow-node,
  .page-faq .qa-q::after,
  .page-faq .qa-q,
  .page-faq .step-item,
  .page-faq .faq-rail-link,
  .page-faq .support-mail,
  .page-faq .breadcrumb a {
    transition: none;
  }

  .page-faq .faq-flow-node:hover,
  .page-faq .faq-flow-node:focus-visible {
    transform: none;
  }
}