.page-faq {
  --faq-aside: 264px;
  --faq-stroke: rgba(20, 64, 94, 0.72);
  --faq-accent: var(--cyan);
  max-width: var(--shell-w);
  margin: 0 auto;
  padding: 28px var(--pad) 104px;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.page-faq * {
  box-sizing: border-box;
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  margin-bottom: 26px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-bottom: 34px;
  border-bottom: 1px solid var(--faq-stroke);
}

.page-faq .faq-hero .label {
  display: inline-block;
  margin: 0 0 16px;
}

.page-faq .faq-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 5.6vw, 58px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-faq .faq-hero__title-em {
  display: block;
  color: var(--orange);
}

.page-faq .faq-hero__lede {
  max-width: 64ch;
  margin: 0;
  font-size: 17px;
  line-height: 1.75;
  color: #c4d6e2;
}

/* ---------- 锚点索引 ---------- */
.page-faq .faq-jump {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(178px, 1fr));
  gap: 8px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--faq-stroke);
  background: rgba(12, 44, 68, 0.6);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.3;
  text-decoration: none;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: border-color 120ms ease, color 120ms ease, background 120ms ease;
}

.page-faq .faq-jump a .mono {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

@media (hover: hover) {
  .page-faq .faq-jump a:hover {
    border-color: var(--cyan);
    background: rgba(20, 64, 94, 0.75);
    color: #ffffff;
  }
}

.page-faq .faq-jump a:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

/* ---------- 场景分组 ---------- */
.page-faq .faq-group {
  position: relative;
  padding-top: 68px;
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 32px;
  border-top: 1px solid rgba(20, 64, 94, 0.4);
}

.page-faq .faq-group--entry { --faq-accent: var(--lime); }
.page-faq .faq-group--replay { --faq-accent: var(--cyan); }
.page-faq .faq-group--team { --faq-accent: var(--amber); }
.page-faq .faq-group--rank { --faq-accent: var(--orange); }
.page-faq .faq-group--device { --faq-accent: #4FA3D1; }
.page-faq .faq-group--contact { --faq-accent: var(--wine); }

.page-faq .faq-group__aside {
  border-top: 3px solid var(--faq-accent);
  padding-top: 16px;
  margin-bottom: 26px;
}

.page-faq .faq-group__num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.16em;
  line-height: 1;
  color: var(--faq-accent);
  margin-bottom: 14px;
}

.page-faq .faq-group__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(21px, 2.7vw, 28px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-faq .faq-group__sum {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--haze);
}

/* ---------- 折叠问答单元 ---------- */
.page-faq .faq-item {
  position: relative;
  margin: 0 0 12px;
  border: 1px solid var(--faq-stroke);
  background: linear-gradient(180deg, rgba(12, 44, 68, 0.72), rgba(10, 36, 54, 0.72));
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: border-color 140ms ease, background 160ms ease;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--grid);
  transition: background 140ms ease;
}

.page-faq .faq-item[open] {
  border-color: rgba(35, 199, 192, 0.45);
  background: linear-gradient(180deg, rgba(20, 64, 94, 0.78), rgba(10, 36, 54, 0.86));
}

.page-faq .faq-item[open]::before {
  background: var(--lime);
}

@media (hover: hover) {
  .page-faq .faq-item:hover {
    border-color: rgba(35, 199, 192, 0.35);
  }
  .page-faq .faq-item:hover::before {
    background: var(--cyan);
  }
  .page-faq .faq-item[open]:hover::before {
    background: var(--lime);
  }
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 48px 17px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: -0.005em;
  color: var(--mist);
  transition: color 120ms ease;
}

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

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 400;
  line-height: 1;
  color: var(--orange);
  transition: color 140ms ease;
}

.page-faq .faq-item[open] .faq-item__q {
  color: #ffffff;
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
  color: var(--lime);
}

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

.page-faq .faq-item__a {
  padding: 0 20px 22px;
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-reveal 220ms ease both;
}

@keyframes faq-reveal {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.72;
  color: #cfe0ea;
}

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

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

@media (hover: hover) {
  .page-faq .faq-item__a a:hover {
    color: var(--lime);
  }
}

.page-faq .faq-item__a .faq-item__act {
  margin: 0 0 14px;
  padding: 11px 15px;
  border-left: 2px solid var(--cyan);
  background: rgba(35, 199, 192, 0.08);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 步骤列表 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .faq-steps > li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  font-size: 15px;
  line-height: 1.68;
  color: #cfe0ea;
}

.page-faq .faq-steps > li > .mono {
  font-size: 12px;
  line-height: 2.1;
  letter-spacing: 0.08em;
  color: var(--amber);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  border: 1px solid var(--faq-stroke);
  background: var(--panel-2);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

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

.page-faq .faq-figure figcaption {
  padding: 11px 16px 13px;
  border-top: 1px solid var(--faq-stroke);
  font-size: 13px;
  line-height: 1.6;
  color: var(--haze);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  padding: 22px 20px 20px;
  margin-bottom: 22px;
}

.page-faq .faq-contact .contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(20, 64, 94, 0.7);
}

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

.page-faq .faq-contact .contact-key {
  flex: none;
  min-width: 76px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--haze);
}

.page-faq .faq-contact .contact-val {
  min-width: 0;
  font-size: 15px;
  color: var(--mist);
}

.page-faq .faq-contact .contact-note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--haze);
}

/* ---------- 邮件标题提示 ---------- */
.page-faq .faq-mailtip {
  padding: 22px 20px;
  border: 1px solid var(--faq-stroke);
  border-top: 3px solid var(--lime);
  background: rgba(10, 36, 54, 0.7);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}

.page-faq .faq-mailtip .label {
  display: block;
  margin: 0 0 16px;
}

.page-faq .faq-mailtip__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-faq .faq-mailtip__list li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.65;
  color: #cfe0ea;
}

.page-faq .faq-mailtip__list .mono {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 3px 0;
  text-align: center;
  border: 1px solid currentColor;
}

.page-faq .tag-lime { color: var(--lime); }
.page-faq .tag-cyan { color: var(--cyan); }
.page-faq .tag-amber { color: var(--amber); }

.page-faq .faq-mailtip__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--haze);
}

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

/* ---------- 滚动揭示过渡 ---------- */
.page-faq [data-reveal] {
  transition: opacity 280ms ease, transform 280ms ease;
}

/* ---------- 窄屏 ---------- */
@media (max-width: 599px) {
  .page-faq {
    padding: 20px 20px 76px;
  }

  .page-faq .faq-hero__lede {
    font-size: 16px;
  }

  .page-faq .faq-jump {
    grid-template-columns: 1fr 1fr;
    gap: 7px;
  }

  .page-faq .faq-jump a {
    padding: 10px 11px;
    font-size: 13px;
  }

  .page-faq .faq-group {
    padding-top: 52px;
  }

  .page-faq .faq-item__q {
    font-size: 15.5px;
    padding: 15px 42px 15px 16px;
  }

  .page-faq .faq-item__q::after {
    right: 15px;
    top: 13px;
  }

  .page-faq .faq-item__a {
    padding: 0 16px 18px;
  }

  .page-faq .faq-steps > li {
    grid-template-columns: 26px minmax(0, 1fr);
    gap: 8px;
    font-size: 14.5px;
  }

  .page-faq .faq-contact,
  .page-faq .faq-mailtip {
    padding: 18px 16px;
  }

  .page-faq .faq-mailtip__list li {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 10px;
    font-size: 14.5px;
  }
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-group {
    display: grid;
    grid-template-columns: var(--faq-aside) minmax(0, 1fr);
    column-gap: 56px;
    align-items: start;
  }

  .page-faq .faq-group__aside {
    position: sticky;
    top: 92px;
    margin-bottom: 0;
  }

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

  .page-faq .faq-contact {
    padding: 26px 28px 24px;
  }

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

@media (min-width: 1200px) {
  .page-faq {
    --faq-aside: 288px;
  }

  .page-faq .faq-group {
    column-gap: 72px;
  }
}

/* ---------- 降低动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal],
  .page-faq .faq-item,
  .page-faq .faq-item::before,
  .page-faq .faq-item__q::after,
  .page-faq .faq-jump a {
    transition: opacity 160ms ease;
  }

  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }
}