/* ===== 问题解答页 · 帮助台手册式布局 ===== */
.page-faq {
  padding-block: 4px 58px;
}

/* —— 页面头部 —— */
.page-faq .faq-head {
  position: relative;
  padding: 18px 0 24px;
  border-bottom: var(--edge);
}

.page-faq .faq-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 116px;
  height: 3px;
  background: linear-gradient(90deg, var(--volt), var(--ember));
}

.page-faq .faq-head h1 {
  margin: 10px 0 0;
  max-width: 20ch;
  font-size: clamp(1.72rem, 6.4vw, 3.3rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-faq .faq-head .lede {
  margin: 16px 0 0;
  max-width: 64ch;
  color: rgba(247, 249, 245, 0.78);
  font-size: 0.95rem;
  line-height: 1.9;
}

.page-faq .faq-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-tags a {
  text-decoration: none;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-faq .faq-tags a:hover,
.page-faq .faq-tags a:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(5, 8, 7, 0.5);
}

/* —— 主体两栏 —— */
.page-faq .faq-layout {
  display: grid;
  gap: 26px;
  padding-top: 26px;
}

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

/* —— 侧栏索引 —— */
.page-faq .faq-index {
  padding: 14px;
  border: var(--edge);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(10, 20, 40, 0.86), rgba(18, 37, 30, 0.7));
}

.page-faq .faq-index__title {
  margin: 0;
  font-family: var(--font-num);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--data);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid rgba(201, 211, 204, 0.16);
  border-radius: var(--radius-sm);
  color: rgba(247, 249, 245, 0.78);
  font-size: 0.85rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--volt);
  border-color: rgba(215, 255, 63, 0.5);
  background: rgba(215, 255, 63, 0.07);
}

.page-faq .faq-index__link .num {
  font-family: var(--font-num);
  font-size: 0.72rem;
  color: var(--grass);
}

.page-faq .faq-index__hint {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: var(--edge-soft);
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--data);
}

.page-faq .faq-index__hint a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(215, 255, 63, 0.45);
}

/* —— 章节 —— */
.page-faq .faq-sec {
  margin-bottom: 44px;
  scroll-margin-top: calc(var(--bar-h) + 14px);
}

.page-faq .faq-sec:last-child {
  margin-bottom: 8px;
}

.page-faq .faq-sec__head {
  padding-bottom: 14px;
  border-bottom: var(--edge-soft);
}

.page-faq .faq-sec__head h2 {
  margin: 6px 0 0;
  font-size: clamp(1.28rem, 4.8vw, 2rem);
  font-weight: 900;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-sec__head p {
  margin: 8px 0 0;
  max-width: 62ch;
  color: var(--data);
  font-size: 0.88rem;
  line-height: 1.85;
}

/* —— 章节配图 —— */
.page-faq .faq-figure {
  margin: 18px 0 0;
  border: var(--edge);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
  box-shadow: var(--shadow-panel);
}

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

/* —— 设备分组卡片 —— */
.page-faq .faq-devices {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.page-faq .faq-device {
  position: relative;
  padding: 16px 16px 18px;
  border: var(--edge);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 37, 30, 0.92), rgba(10, 20, 40, 0.92));
  box-shadow: var(--shadow-panel);
  scroll-margin-top: calc(var(--bar-h) + 18px);
}

.page-faq .faq-device::before {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--grass), rgba(30, 122, 90, 0));
}

.page-faq .faq-device h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--volt);
}

.page-faq .faq-ico {
  flex: 0 0 auto;
  color: var(--volt);
}

/* —— 折叠面板 —— */
.page-faq .qa {
  padding: 0;
}

.page-faq .qa + .qa {
  border-top: var(--edge-soft);
}

.page-faq .qa__q {
  position: relative;
  display: block;
  padding: 13px 34px 13px 0;
  cursor: pointer;
  font-size: 0.93rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
  list-style: none;
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 12px;
  width: 21px;
  height: 21px;
  display: grid;
  place-items: center;
  font-family: var(--font-num);
  font-size: 0.95rem;
  line-height: 1;
  color: var(--volt);
  border: 1px solid rgba(215, 255, 63, 0.42);
  border-radius: 4px;
  transition: background 0.22s var(--ease), color 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .qa[open] > .qa__q::after {
  content: "−";
  background: var(--volt);
  border-color: var(--volt);
  color: var(--ink);
}

.page-faq .qa__q:hover {
  color: var(--volt);
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--volt);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-faq .qa__a {
  padding: 0 4px 15px 0;
  color: rgba(247, 249, 245, 0.76);
  font-size: 0.89rem;
  line-height: 1.88;
}

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

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

.page-faq .qa__a a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(215, 255, 63, 0.4);
}

.page-faq .qa__steps {
  margin: 10px 0 12px;
  padding-left: 1.15em;
  display: grid;
  gap: 6px;
}

.page-faq .qa__steps li::marker {
  color: var(--volt);
  font-family: var(--font-num);
  font-size: 0.85em;
}

/* —— 页脚入口说明 —— */
.page-faq .faq-help {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.page-faq .faq-help__item {
  position: relative;
  padding: 15px 16px 16px 18px;
  border: var(--edge-soft);
  border-left: 3px solid var(--grass);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(18, 37, 30, 0.6);
}

.page-faq .faq-help__item h3 {
  margin: 0 0 7px;
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-help__item p {
  margin: 0;
  color: rgba(247, 249, 245, 0.74);
  font-size: 0.87rem;
  line-height: 1.85;
}

.page-faq .faq-help__item a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(215, 255, 63, 0.4);
}

/* —— 联系面板 —— */
.page-faq .faq-contact {
  margin-top: 22px;
  padding: 20px 18px 22px;
  border-color: rgba(215, 255, 63, 0.28);
  background: linear-gradient(140deg, rgba(11, 46, 36, 0.95), rgba(10, 20, 40, 0.95));
}

.page-faq .faq-contact__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 900;
  line-height: 1.35;
  color: var(--volt);
}

.page-faq .faq-contact__text {
  margin: 10px 0 0;
  max-width: 60ch;
  color: rgba(247, 249, 245, 0.76);
  font-size: 0.87rem;
  line-height: 1.85;
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
}

.page-faq .faq-contact__mail {
  font-family: var(--font-num);
  font-size: 0.9rem;
  color: var(--paper);
  padding: 7px 12px;
  border: 1px dashed rgba(201, 211, 204, 0.34);
  border-radius: var(--radius-sm);
  word-break: break-all;
}

.page-faq .faq-contact__row .copy-status {
  font-size: 0.78rem;
  color: var(--volt);
}

/* —— 桌面端 —— */
@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 26px;
    padding: 18px 16px;
  }

  .page-faq .faq-index__list {
    display: grid;
    gap: 4px;
    margin-top: 14px;
    padding: 0;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    width: 100%;
    box-sizing: border-box;
    white-space: normal;
  }

  .page-faq .faq-index__link .num {
    font-size: 0.7rem;
    letter-spacing: 0.06em;
  }

  .page-faq .faq-devices {
    grid-template-columns: repeat(auto-fit, minmax(272px, 1fr));
  }

  .page-faq .faq-help {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-contact {
    padding: 26px 28px 28px;
  }

  .page-faq .faq-contact__row {
    flex-wrap: nowrap;
  }
}

/* —— 窄屏收紧 —— */
@media (max-width: 420px) {
  .page-faq .faq-head h1 {
    font-size: 1.6rem;
  }

  .page-faq .faq-tags {
    gap: 8px;
  }

  .page-faq .faq-device {
    padding: 14px 13px 16px;
  }

  .page-faq .faq-contact {
    padding: 18px 14px 20px;
  }

  .page-faq .faq-contact__row .btn {
    flex: 1 1 auto;
  }
}
</style>