/* ===== 知识中心 · 页面专属样式（作用域 .page-faq） ===== */

.page-faq {
  --faq-gap: clamp(18px, 2.6vw, 32px);
  display: block;
  background: var(--ink-800);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding: clamp(20px, 3.4vw, 36px) 0 0;
}

.page-faq .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--steel);
}

.page-faq .breadcrumb a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cold);
  transition: color .18s ease, border-color .18s ease;
}

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

.page-faq .breadcrumb__sep {
  margin: 0 8px;
  opacity: .6;
}

/* ---------- 封面 ---------- */
.page-faq .faq-cover {
  position: relative;
  padding: clamp(30px, 5.4vw, 70px) 0 clamp(30px, 4vw, 52px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-cover::before {
  content: "";
  position: absolute;
  inset: -34% -12% auto 30%;
  height: 150%;
  background:
    radial-gradient(46% 40% at 74% 18%, rgba(53, 224, 208, .14), transparent 70%),
    radial-gradient(40% 44% at 14% 80%, rgba(201, 162, 39, .13), transparent 72%);
  pointer-events: none;
}

.page-faq .faq-cover__top {
  position: relative;
  display: grid;
  gap: var(--faq-gap);
}

@media (min-width: 960px) {
  .page-faq .faq-cover__top {
    grid-template-columns: minmax(0, 7.2fr) minmax(0, 4.8fr);
    align-items: end;
  }
}

.page-faq .faq-cover__title {
  margin: 16px 0 0;
  font-size: clamp(2rem, 5.6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: .005em;
  color: var(--paper);
}

.page-faq .faq-cover__lede {
  max-width: 58ch;
  margin: 20px 0 0;
}

/* 快速入口面板 */
.page-faq .faq-quick {
  border: 1px solid var(--line-gold);
  background: linear-gradient(160deg, rgba(242, 208, 107, .10), rgba(11, 31, 26, 0) 60%);
  padding: 18px 18px 10px;
}

.page-faq .faq-quick__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-faq .faq-quick__item {
  display: grid;
  grid-template-columns: 8px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 12px 4px;
  border-top: 1px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  font-size: 14px;
  transition: color .18s ease, padding-left .18s ease;
}

.page-faq .faq-quick__item:hover {
  color: var(--cyan);
  padding-left: 9px;
}

.page-faq .faq-quick__dot {
  display: block;
  width: 6px;
  height: 6px;
  background: var(--cyan);
}

.page-faq .faq-quick__dot--coral { background: var(--coral); }
.page-faq .faq-quick__dot--gold { background: var(--gold); }

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

.page-faq .faq-quick__go {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--steel);
  white-space: nowrap;
}

/* ---------- 三类自查 ---------- */
.page-faq .faq-check {
  padding: clamp(34px, 5vw, 64px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-check__intro {
  max-width: 64ch;
}

.page-faq .faq-check__intro h2 {
  margin: 12px 0 0;
  font-size: clamp(1.45rem, 2.6vw, 2.05rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-check__intro p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .faq-check__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-faq .faq-check__card {
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-top: 3px solid var(--cyan);
  padding: 22px 20px 24px;
}

.page-faq .faq-check__card--login { border-top-color: var(--cyan); }
.page-faq .faq-check__card--device { border-top-color: var(--coral); }
.page-faq .faq-check__card--benefit { border-top-color: var(--gold); }

@media (min-width: 880px) {
  .page-faq .faq-check__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-faq .faq-check__card {
    border-right: none;
    border-left: none;
  }

  .page-faq .faq-check__card:first-child { border-left: 1px solid var(--line); }
  .page-faq .faq-check__card:last-child { border-right: 1px solid var(--line); }
  .page-faq .faq-check__card + .faq-check__card { border-left: 1px solid var(--line); }
}

.page-faq .faq-check__head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.page-faq .faq-check__num {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--steel);
}

.page-faq .faq-check__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-check__sub {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

.page-faq .faq-check__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-check__list li {
  position: relative;
  padding: 10px 0 10px 20px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(232, 237, 234, .86);
  border-top: 1px solid var(--line);
}

.page-faq .faq-check__list li:first-child { border-top: none; }

.page-faq .faq-check__list li::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-check__card--device .faq-check__list li::before { color: var(--coral); }
.page-faq .faq-check__card--benefit .faq-check__list li::before { color: var(--gold); }

/* ---------- 通用区块 ---------- */
.page-faq .faq-sec {
  padding: clamp(36px, 5.4vw, 76px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-head {
  max-width: 68ch;
}

.page-faq .faq-head h2 {
  margin: 12px 0 0;
  font-size: clamp(1.45rem, 2.8vw, 2.15rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-head p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(232, 237, 234, .78);
}

/* ---------- 图片 ---------- */
.page-faq .faq-shot {
  position: relative;
  margin: clamp(22px, 3vw, 34px) 0 0;
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--ink-900);
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.86) brightness(.88);
}

.page-faq .faq-shot figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--steel);
}

.page-faq .faq-shot--cold {
  border-color: var(--line-cold);
}

.page-faq .faq-shot--cold img {
  filter: saturate(.7) brightness(.9);
}

/* ---------- 四步流程 ---------- */
.page-faq .faq-steps {
  margin-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-steps .expand {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-step__btn {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 4px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 15px;
  transition: background-color .18s ease;
}

.page-faq .faq-step__btn:hover {
  background: rgba(53, 224, 208, .05);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
  padding: 3px 7px;
  border: 1px solid rgba(53, 224, 208, .35);
  background: rgba(53, 224, 208, .07);
}

.page-faq .faq-step__main {
  display: block;
  min-width: 0;
}

.page-faq .faq-step__label {
  display: block;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-step__hint {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--steel);
}

.page-faq .faq-step__caret {
  flex: none;
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--cyan);
  border-bottom: 1.5px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .18s ease;
}

.page-faq .faq-step__btn[aria-expanded="true"] .faq-step__caret,
.page-faq .faq-step__btn[data-open] .faq-step__caret,
.page-faq .expand[data-open] .faq-step__caret {
  transform: rotate(-135deg);
}

.page-faq .faq-step__panel {
  padding: 0 4px 22px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(232, 237, 234, .8);
}

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

.page-faq .faq-step__tip {
  margin-top: 12px;
  padding: 10px 13px;
  border-left: 2px solid var(--gold);
  background: rgba(201, 162, 39, .09);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  line-height: 1.7;
  color: var(--gold-light);
}

/* ---------- 登录痕迹（冷区） ---------- */
.page-faq .faq-record {
  padding: clamp(36px, 5.4vw, 76px) 0;
  background: linear-gradient(180deg, rgba(22, 35, 43, .92), rgba(6, 18, 15, .58));
  border-bottom: 1px solid var(--line-cold);
}

.page-faq .faq-record__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
}

@media (min-width: 960px) {
  .page-faq .faq-record__grid {
    grid-template-columns: minmax(0, 6.2fr) minmax(0, 5.8fr);
    align-items: start;
  }
}

.page-faq .faq-record__lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(232, 237, 234, .8);
}

.page-faq .faq-clues {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line-cold);
  border: 1px solid var(--line-cold);
}

@media (min-width: 560px) {
  .page-faq .faq-clues {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .faq-clues li {
  background: var(--cold);
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.68;
  color: rgba(232, 237, 234, .88);
}

.page-faq .faq-clues__k {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-faq .faq-record__expand {
  margin-top: 20px;
  border: 1px solid var(--line-cold);
  background: rgba(22, 35, 43, .55);
}

.page-faq .faq-record__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 14px;
  transition: background-color .18s ease;
}

.page-faq .faq-record__toggle:hover {
  background: rgba(53, 224, 208, .06);
}

.page-faq .faq-record__mark {
  flex: none;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
  transition: transform .18s ease;
}

.page-faq .faq-record__toggle[aria-expanded="true"] .faq-record__mark,
.page-faq .faq-record__toggle[data-open] .faq-record__mark,
.page-faq .expand[data-open] .faq-record__mark {
  transform: rotate(45deg);
}

.page-faq .faq-record__panel {
  padding: 0 16px 18px;
  font-size: 14px;
  line-height: 1.82;
  color: rgba(232, 237, 234, .8);
}

.page-faq .faq-record__panel p {
  margin: 0;
}

/* ---------- 自助索引 ---------- */
.page-faq .faq-index {
  padding: clamp(36px, 5.4vw, 76px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__groups {
  margin-top: clamp(24px, 3vw, 36px);
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

@media (min-width: 760px) {
  .page-faq .faq-index__groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .faq-index__group {
  border: 1px solid var(--line);
  padding: 18px 18px 20px;
  background: rgba(232, 237, 234, .015);
}

.page-faq .faq-index__gt {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__gt h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-index__count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-faq .faq-tags {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
}

.page-faq .faq-tags li {
  padding: 7px 9px;
  font-size: 13px;
  line-height: 1.5;
  color: rgba(232, 237, 234, .84);
  background: rgba(232, 237, 234, .035);
  border-left: 2px solid rgba(53, 224, 208, .5);
  overflow-wrap: break-word;
}

.page-faq .faq-index__group--login .faq-tags li { border-left-color: rgba(201, 162, 39, .55); }
.page-faq .faq-index__group--device .faq-tags li { border-left-color: rgba(255, 107, 90, .5); }
.page-faq .faq-index__group--benefit .faq-tags li { border-left-color: rgba(124, 147, 160, .65); }

/* ---------- 联系准备 ---------- */
.page-faq .faq-prep {
  padding: clamp(36px, 5.4vw, 76px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-prep__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 42px);
}

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

.page-faq .faq-contact {
  margin-top: 26px;
  border: 1px solid var(--line-gold);
  background: linear-gradient(150deg, rgba(242, 208, 107, .11), rgba(11, 31, 26, 0) 62%);
  padding: 18px 18px 20px;
}

.page-faq .faq-contact dl {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-contact dt {
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--gold);
}

.page-faq .faq-contact dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-prep__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-prep__list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(232, 237, 234, .86);
}

.page-faq .faq-prep__list li span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--coral);
  padding-top: 3px;
}

/* ---------- 收束 ---------- */
.page-faq .faq-update {
  padding: clamp(38px, 5.6vw, 84px) 0 clamp(44px, 6.4vw, 96px);
}

.page-faq .faq-update__inner {
  max-width: 68ch;
}

.page-faq .faq-update__inner h2 {
  margin: 12px 0 18px;
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  font-weight: 700;
  line-height: 1.24;
  color: var(--paper);
}

.page-faq .faq-update__inner p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(232, 237, 234, .78);
}

.page-faq .faq-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.page-faq .faq-links a {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--cyan);
  text-decoration: none;
  border: 1px solid rgba(53, 224, 208, .4);
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}

.page-faq .faq-links a:hover {
  background: var(--cyan);
  color: var(--ink-900);
  border-color: var(--cyan);
}

@media (min-width: 760px) {
  .page-faq .faq-tags {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-tags {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__item,
  .page-faq .faq-step__btn,
  .page-faq .faq-step__caret,
  .page-faq .faq-record__toggle,
  .page-faq .faq-record__mark,
  .page-faq .faq-links a,
  .page-faq .breadcrumb a {
    transition: none;
  }
}