/* ===== 帮助中心 /help/ 页面专属样式（作用域 .page-faq） ===== */

.page-faq {
  display: block;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: clamp(24px, 4vw, 48px) 0 clamp(32px, 5vw, 64px);
}

.page-faq .faq-hero__frame {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 48px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(0deg, var(--line-faint) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(90deg, var(--line-faint) 0 1px, transparent 1px 56px),
    linear-gradient(160deg, rgba(18, 48, 72, 0.74), rgba(6, 23, 38, 0.94));
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 12px;
  width: 16px;
  height: 16px;
  border-top: 2px solid var(--coral);
  border-left: 2px solid var(--coral);
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 16px;
  height: 16px;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-hero__copy,
.page-faq .faq-hero__side {
  min-width: 0;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 18px;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.page-faq .faq-hero__lead {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-hero__lead--sub {
  color: var(--coral-soft);
  font-size: 15px;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__side {
  display: grid;
  gap: 20px;
}

.page-faq .faq-hero__side img,
.page-faq .role-filter__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-faint);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--line-faint);
}

.page-faq .faq-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--hull);
}

.page-faq .faq-hero__stats li .mono {
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .faq-hero__stats li span:last-child {
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 章节公共节奏 ---------- */

.page-faq .faq-block {
  padding: clamp(48px, 8vw, 100px) 0;
}

.page-faq .section-note {
  margin: 12px 0 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 身份筛选 ---------- */

.page-faq .role-filter {
  position: relative;
}

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

.page-faq .role-filter__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}

.page-faq .role-filter__aside {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-faq .role-filter__cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-faq .role-card {
  display: block;
  padding: 12px 14px 14px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--hull);
  cursor: pointer;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-faq .role-card:hover {
  border-color: var(--coral-soft);
  transform: translateX(2px);
}

.page-faq .role-card__code {
  display: block;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--teal);
}

.page-faq .role-card__name {
  display: block;
  margin-top: 6px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-faq .role-card__desc {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--mist);
}

.page-faq #role-all:checked ~ .role-filter__layout .role-filter__cards .role-card:nth-child(1),
.page-faq #role-ent:checked ~ .role-filter__layout .role-filter__cards .role-card:nth-child(2),
.page-faq #role-new:checked ~ .role-filter__layout .role-filter__cards .role-card:nth-child(3),
.page-faq #role-ret:checked ~ .role-filter__layout .role-filter__cards .role-card:nth-child(4) {
  border-color: var(--cyan);
  border-left-color: var(--cyan);
  background: linear-gradient(135deg, rgba(47, 227, 214, 0.16), rgba(18, 48, 72, 0.92));
  box-shadow: inset 0 0 0 1px rgba(47, 227, 214, 0.3);
}

.page-faq #role-all:checked ~ .role-filter__layout .role-filter__cards .role-card:nth-child(1) .role-card__code,
.page-faq #role-ent:checked ~ .role-filter__layout .role-filter__cards .role-card:nth-child(2) .role-card__code,
.page-faq #role-new:checked ~ .role-filter__layout .role-filter__cards .role-card:nth-child(3) .role-card__code,
.page-faq #role-ret:checked ~ .role-filter__layout .role-filter__cards .role-card:nth-child(4) .role-card__code {
  color: var(--cyan);
}

.page-faq .role-filter__panel {
  min-width: 0;
}

.page-faq .role-filter__legend {
  margin: 0 0 14px;
  padding-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
  border-bottom: 1px solid var(--line-faint);
}

/* 身份筛选：默认全部可见，选中某类后隐藏其余 */
.page-faq #role-all:checked ~ .role-filter__layout .role-filter__panel .qa {
  display: block;
}

.page-faq #role-ent:checked ~ .role-filter__layout .role-filter__panel .qa,
.page-faq #role-new:checked ~ .role-filter__layout .role-filter__panel .qa,
.page-faq #role-ret:checked ~ .role-filter__layout .role-filter__panel .qa {
  display: none;
}

.page-faq #role-ent:checked ~ .role-filter__layout .role-filter__panel .qa[data-role~="ent"],
.page-faq #role-new:checked ~ .role-filter__layout .role-filter__panel .qa[data-role~="new"],
.page-faq #role-ret:checked ~ .role-filter__layout .role-filter__panel .qa[data-role~="ret"] {
  display: block;
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  min-width: 0;
}

.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--hull);
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--line);
}

.page-faq .qa[open] {
  border-color: rgba(47, 227, 214, 0.42);
  background: var(--raise);
}

.page-faq .qa__summary {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 15px 18px 15px 22px;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .qa__summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--coral);
  opacity: 0;
  transition: opacity 160ms var(--ease);
}

.page-faq .qa[open] .qa__summary::before {
  opacity: 1;
}

.page-faq .qa__summary::after {
  content: "";
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--mist);
  border-bottom: 2px solid var(--mist);
  transform: rotate(45deg);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .qa[open] .qa__summary::after {
  transform: rotate(-135deg);
  border-color: var(--coral);
}

.page-faq .qa__num {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .qa__q {
  font-size: 16px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--ink);
}

.page-faq .qa__body {
  padding: 0 18px 20px 22px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .qa__body p {
  margin: 0 0 10px;
  max-width: 36em;
}

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

.page-faq .qa__body a {
  color: var(--coral-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 169, 138, 0.5);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .qa__body a:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* ---------- 下载章节：主列表 + 侧栏提示 ---------- */

.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
}

.page-faq .faq-aside {
  align-self: start;
  padding: 20px 22px 24px;
  border-radius: var(--radius);
  background: var(--hull);
}

.page-faq .faq-aside--accent {
  border: 1px solid rgba(255, 106, 61, 0.4);
  background: linear-gradient(165deg, rgba(255, 106, 61, 0.14), rgba(18, 48, 72, 0.9));
}

.page-faq .faq-aside__title {
  margin: 12px 0 16px;
  font-size: 20px;
  line-height: 1.45;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-faq .faq-aside__big {
  margin: 10px 0 0;
  font-size: clamp(56px, 12vw, 88px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--coral);
  opacity: 0.92;
}

.page-faq .faq-aside__big-label {
  margin: 6px 0 16px;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-aside__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-aside__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding-top: 10px;
  border-top: 1px solid var(--line-faint);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-aside__list li .mono {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-aside--accent .faq-aside__list li {
  border-top-color: rgba(255, 106, 61, 0.28);
}

/* ---------- 版本章节：左侧时间线感 ---------- */

.page-faq .faq-timeline {
  position: relative;
  padding-left: 18px;
  border-left: 1px solid var(--line-faint);
}

.page-faq .faq-timeline .qa {
  background: rgba(13, 36, 57, 0.85);
}

.page-faq .faq-timeline .qa:nth-child(odd) {
  border-left: 2px solid var(--line);
}

.page-faq .faq-timeline .qa:nth-child(even) {
  border-left: 2px solid rgba(255, 200, 87, 0.55);
}

/* ---------- 联系章节 ---------- */

.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-contact__card {
  padding: 22px 22px 24px;
  border-radius: var(--radius);
}

.page-faq .faq-contact__card .contact-list {
  margin: 14px 0 0;
}

.page-faq .faq-contact__card .contact-note {
  margin-top: 16px;
}

.page-faq .faq-contact__aside {
  min-width: 0;
  padding: 22px;
  border: 1px dashed var(--line-soft);
  border-radius: var(--radius);
  background: rgba(13, 36, 57, 0.55);
}

.page-faq .faq-contact__title {
  margin: 0 0 16px;
  font-size: 19px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-faq .faq-contact__check {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-faq .faq-contact__check li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-contact__check li .mono {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-contact__more {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-faint);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-contact__more a {
  color: var(--coral-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 169, 138, 0.5);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .faq-contact__more a:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* ---------- 进入视口淡入 ---------- */

.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 240ms var(--ease), transform 240ms var(--ease);
}

.page-faq [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 平板与桌面 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-faq .qa__body {
    padding-left: 60px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-faq .role-filter__layout {
    grid-template-columns: minmax(0, 306px) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .role-filter__aside {
    position: sticky;
    top: 104px;
  }

  .page-faq .role-filter__cards {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.85fr);
  }

  .page-faq .faq-split--reverse {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.6fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .role-card,
  .page-faq .qa,
  .page-faq .qa__summary::before,
  .page-faq .qa__summary::after,
  .page-faq [data-reveal] {
    transition: none;
  }

  .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
  }
}