.page-faq {
  --faq-ink: var(--bys-frost);
  --faq-soft: var(--bys-steel);
  --faq-line: var(--bys-hairline);
  --faq-line-soft: var(--bys-hairline-soft);
  --faq-panel: rgba(11, 42, 69, 0.62);
  --faq-ink-deep: #23384a;
  --faq-line-deep: var(--bys-slate);
  background: var(--bys-midnight);
  color: var(--faq-ink);
}

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

.page-faq a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(28px, 4.6vw, 56px) 0 clamp(32px, 5vw, 68px);
  background:
    repeating-linear-gradient(
      0deg,
      rgba(234, 242, 247, 0.045) 0 1px,
      transparent 1px 7px
    ),
    radial-gradient(110% 90% at 92% 6%, rgba(242, 106, 46, 0.18), transparent 58%),
    linear-gradient(158deg, #061725 0%, #0b2a45 58%, #123f61 100%);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 40px);
  align-items: start;
}

.page-faq .faq-hero__lead-col h1 {
  margin: 12px 0 0;
  font-family: var(--bys-font-display);
  font-size: clamp(30px, 6.2vw, 62px);
  font-weight: 900;
  line-height: 1.03;
  letter-spacing: -0.03em;
  color: var(--bys-frost);
  max-width: 16em;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.72;
  color: rgba(234, 242, 247, 0.82);
  max-width: 40em;
}

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

.page-faq .faq-hero__status {
  position: relative;
  padding: 22px 22px 18px;
  background: linear-gradient(180deg, rgba(20, 80, 122, 0.55), rgba(6, 23, 37, 0.85));
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--bys-flare);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-hero__status-title {
  margin: 0 0 14px;
  font-family: var(--bys-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bys-amber);
}

.page-faq .faq-hero__status-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  font-size: 14px;
  line-height: 1.55;
  color: rgba(234, 242, 247, 0.88);
}

.page-faq .faq-hero__status-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.page-faq .faq-hero__status-note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--faq-line);
  font-family: var(--bys-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--bys-steel);
}

.page-faq .faq-ver {
  flex: none;
  font-family: var(--bys-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 2px 7px;
  border: 1px solid currentColor;
  border-radius: 2px;
  line-height: 1.5;
}

.page-faq .faq-ver--stable { color: var(--bys-online); }
.page-faq .faq-ver--test { color: var(--bys-amber); }
.page-faq .faq-ver--maint { color: var(--bys-steel); }

/* ---------- 三步路径 ---------- */
.page-faq .faq-steps-wrap {
  background: var(--bys-paper);
  color: var(--bys-midnight);
  padding: clamp(30px, 4.6vw, 54px) 0 clamp(34px, 5vw, 58px);
  border-bottom: 4px solid var(--bys-flare);
}

.page-faq .faq-steps-wrap .bys-eyebrow {
  color: var(--bys-deep);
}

.page-faq .faq-steps__heading {
  margin: 10px 0 0;
  font-family: var(--bys-font-display);
  font-size: clamp(21px, 3vw, 32px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--bys-midnight);
  max-width: 22em;
}

.page-faq .faq-steps {
  position: relative;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-faq .faq-steps__track {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  top: 20px;
  width: 100%;
  height: 14px;
  color: var(--bys-slate);
}

.page-faq .faq-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-faq .faq-steps__link {
  position: relative;
  display: block;
  padding: 42px 16px 18px 0;
  text-decoration: none;
  color: inherit;
  border-top: 1px solid var(--bys-slate);
  transition: color var(--bys-speed) var(--bys-ease);
}

.page-faq .faq-steps__dot {
  position: absolute;
  top: 13px;
  left: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bys-paper);
  border: 3px solid var(--bys-flare);
  box-sizing: border-box;
  transition: transform var(--bys-speed) var(--bys-ease);
}

.page-faq .faq-steps__num {
  display: block;
  font-family: var(--bys-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--bys-flare);
}

.page-faq .faq-steps__title {
  display: block;
  margin-top: 6px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--bys-midnight);
}

.page-faq .faq-steps__desc {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(6, 23, 37, 0.7);
}

.page-faq .faq-steps__link:hover .faq-steps__dot,
.page-faq .faq-steps__link:focus-visible .faq-steps__dot {
  transform: scale(1.3);
}

.page-faq .faq-steps__link:hover .faq-steps__title,
.page-faq .faq-steps__link:focus-visible .faq-steps__title {
  color: var(--bys-broadcast);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  padding-top: clamp(26px, 4vw, 46px);
  padding-bottom: clamp(38px, 6vw, 76px);
}

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

.page-faq .faq-section {
  padding: clamp(22px, 3.2vw, 40px);
  margin-bottom: clamp(18px, 2.4vw, 26px);
  background: var(--faq-panel);
  border: 1px solid var(--faq-line);
  box-shadow: inset 0 1px 0 rgba(234, 242, 247, 0.06);
}

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

.page-faq .faq-section--paper {
  background: var(--bys-paper);
  color: var(--bys-midnight);
  border-color: var(--bys-slate);
  border-left: 3px solid var(--bys-pitch);
  box-shadow: 6px 6px 0 rgba(20, 80, 122, 0.16);
}

.page-faq .faq-section--paper .bys-eyebrow {
  color: var(--bys-deep);
}

.page-faq .faq-section h2 {
  margin: 10px 0 0;
  font-family: var(--bys-font-display);
  font-size: clamp(21px, 3.1vw, 34px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--bys-frost);
}

.page-faq .faq-section--paper h2 {
  color: var(--bys-midnight);
}

.page-faq .faq-section__lead {
  margin: 14px 0 0;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.75;
  color: rgba(234, 242, 247, 0.8);
  max-width: 44em;
}

.page-faq .faq-section--paper .faq-section__lead {
  color: rgba(6, 23, 37, 0.76);
}

.page-faq .faq-note {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(234, 242, 247, 0.72);
}

.page-faq .faq-section--paper .faq-note {
  color: rgba(6, 23, 37, 0.74);
}

.page-faq .faq-note a {
  color: var(--bys-amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-section--paper .faq-note a {
  color: var(--bys-broadcast);
}

.page-faq .faq-mono {
  font-family: var(--bys-font-mono);
  font-size: 0.95em;
  letter-spacing: 0.02em;
  word-break: break-word;
}

/* ---------- 设备筛选 ---------- */
.page-faq .faq-filter__input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.page-faq .faq-filter__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 6px;
}

.page-faq .faq-filter__btn {
  display: inline-block;
  padding: 7px 15px;
  font-family: var(--bys-font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--bys-steel);
  border: 1px solid var(--faq-line);
  border-radius: 2px;
  cursor: pointer;
  transition: background var(--bys-speed) var(--bys-ease),
    color var(--bys-speed) var(--bys-ease),
    border-color var(--bys-speed) var(--bys-ease);
}

.page-faq .faq-filter__btn:hover {
  color: var(--bys-frost);
  border-color: var(--bys-amber);
}

.page-faq .faq-filter__input:nth-of-type(1):checked ~ .faq-filter__bar .faq-filter__btn:nth-child(1),
.page-faq .faq-filter__input:nth-of-type(2):checked ~ .faq-filter__bar .faq-filter__btn:nth-child(2),
.page-faq .faq-filter__input:nth-of-type(3):checked ~ .faq-filter__bar .faq-filter__btn:nth-child(3),
.page-faq .faq-filter__input:nth-of-type(4):checked ~ .faq-filter__bar .faq-filter__btn:nth-child(4) {
  background: var(--bys-amber);
  border-color: var(--bys-amber);
  color: var(--bys-midnight);
}

.page-faq .faq-filter__input:focus-visible ~ .faq-filter__bar {
  outline: 2px solid var(--bys-amber);
  outline-offset: 3px;
}

.page-faq #faq-dev-mobile:checked ~ .faq-qlist > .faq-q:not([data-device~="mobile"]),
.page-faq #faq-dev-tablet:checked ~ .faq-qlist > .faq-q:not([data-device~="tablet"]),
.page-faq #faq-dev-desktop:checked ~ .faq-qlist > .faq-q:not([data-device~="desktop"]) {
  display: none;
}

/* ---------- 排查手风琴 ---------- */
.page-faq .faq-qlist {
  margin-top: 8px;
  border-bottom: 1px solid var(--faq-line);
}

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

.page-faq .faq-q__summary {
  position: relative;
  display: block;
  padding: 15px 40px 15px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-q__summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 13px;
  font-family: var(--bys-font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--bys-flare);
}

.page-faq .faq-q[open] .faq-q__summary::after {
  content: "\2212";
}

.page-faq .faq-q__summary::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  background: var(--bys-flare);
  transition: width var(--bys-speed) var(--bys-ease);
}

.page-faq .faq-q:hover .faq-q__summary::before,
.page-faq .faq-q__summary:focus-visible::before {
  width: 46px;
}

.page-faq .faq-q__summary:focus-visible {
  outline: 2px solid var(--bys-amber);
  outline-offset: 2px;
}

.page-faq .faq-q__tag {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 6px;
  font-family: var(--bys-font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--bys-amber);
  border: 1px solid rgba(255, 179, 92, 0.5);
  border-radius: 2px;
  vertical-align: 2px;
}

.page-faq .faq-q__title {
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--bys-frost);
}

.page-faq .faq-q__body {
  padding: 2px 0 18px;
  border-left: 2px solid var(--bys-pitch);
  padding-left: 14px;
  margin-bottom: 6px;
}

.page-faq .faq-q__body p {
  margin: 0 0 8px;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(234, 242, 247, 0.8);
}

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

.page-faq .faq-q__key {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--bys-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--bys-online);
}

/* ---------- 阵容窗口 ---------- */
.page-faq .faq-window {
  margin: 22px 0 26px;
  padding: 20px;
  border: 1px dashed var(--bys-slate);
  background: rgba(195, 208, 216, 0.18);
}

.page-faq .faq-window__bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-faq .faq-window__mark {
  font-family: var(--bys-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--bys-deep);
  white-space: nowrap;
}

.page-faq .faq-window__track {
  flex: 1 1 110px;
  height: 6px;
  min-width: 80px;
  background: rgba(6, 23, 37, 0.14);
  overflow: hidden;
}

.page-faq .faq-window__fill {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--bys-pitch), var(--bys-flare));
}

.page-faq .faq-window__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-window__list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(6, 23, 37, 0.78);
  padding-left: 12px;
  border-left: 2px solid rgba(30, 122, 79, 0.35);
}

.page-faq .faq-window__key {
  font-family: var(--bys-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--bys-pitch);
}

/* ---------- 表格 ---------- */
.page-faq .faq-table-scroll {
  margin: 20px 0 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.6;
}

.page-faq .faq-table__caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 10px;
  font-size: 13px;
  color: rgba(6, 23, 37, 0.66);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  text-align: left;
  padding: 11px 12px;
  border-bottom: 1px solid var(--faq-line);
  vertical-align: top;
}

.page-faq .faq-table thead th {
  font-family: var(--bys-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bys-amber);
  border-bottom: 1px solid rgba(255, 179, 92, 0.4);
}

.page-faq .faq-table tbody th {
  font-weight: 700;
  color: var(--bys-frost);
}

.page-faq .faq-table td {
  color: rgba(234, 242, 247, 0.8);
  font-family: var(--bys-font-mono);
  font-size: 13px;
  letter-spacing: 0.01em;
}

.page-faq .faq-section--paper .faq-table th,
.page-faq .faq-section--paper .faq-table td {
  border-bottom-color: var(--bys-slate);
}

.page-faq .faq-section--paper .faq-table thead th {
  color: var(--bys-deep);
  border-bottom-color: var(--bys-deep);
}

.page-faq .faq-section--paper .faq-table tbody th {
  color: var(--bys-midnight);
}

.page-faq .faq-section--paper .faq-table td {
  color: rgba(6, 23, 37, 0.78);
  font-family: var(--bys-font-body);
  font-size: 13.5px;
}

/* ---------- 支持清单 ---------- */
.page-faq .faq-support__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin-top: 20px;
}

.page-faq .faq-checklist {
  list-style: none;
  counter-reset: faqck;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-checklist li {
  counter-increment: faqck;
  position: relative;
  padding-left: 32px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(6, 23, 37, 0.82);
}

.page-faq .faq-checklist li::before {
  content: counter(faqck, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--bys-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--bys-flare);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 24px 0 0;
  padding: 0;
}

.page-faq .faq-figure__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--bys-slate);
  background: var(--bys-broadcast);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(234, 242, 247, 0.7);
}

.page-faq .faq-section--paper .faq-figure figcaption {
  color: rgba(6, 23, 37, 0.66);
}

.page-faq .faq-figure--compact {
  margin-top: 0;
}

/* ---------- 侧边支持卡 ---------- */
.page-faq .faq-aside {
  display: grid;
  gap: 16px;
  align-content: start;
  min-width: 0;
}

.page-faq .faq-aside__card {
  padding: 22px;
  border: 1px solid var(--faq-line);
  background: linear-gradient(180deg, rgba(20, 80, 122, 0.6), rgba(6, 23, 37, 0.92));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-faq .faq-aside__card--slim {
  background: rgba(11, 42, 69, 0.55);
  clip-path: none;
}

.page-faq .faq-aside__title {
  margin: 10px 0 0;
  font-family: var(--bys-font-display);
  font-size: 21px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.22;
  color: var(--bys-frost);
}

.page-faq .faq-aside__text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(234, 242, 247, 0.78);
}

.page-faq .faq-aside__list {
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-aside__row {
  padding-top: 12px;
  border-top: 1px dashed var(--faq-line);
}

.page-faq .faq-aside__row:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-aside__row dt {
  font-family: var(--bys-font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bys-steel);
}

.page-faq .faq-aside__row dd {
  margin: 5px 0 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--bys-frost);
  word-break: break-word;
}

.page-faq .faq-aside__btn {
  margin-top: 20px;
  display: block;
  text-align: center;
}

.page-faq .faq-aside__links {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-aside__links a {
  display: block;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--faq-line-soft);
  font-size: 14px;
  line-height: 1.55;
  text-decoration: none;
  color: rgba(234, 242, 247, 0.85);
  transition: color var(--bys-speed) var(--bys-ease);
}

.page-faq .faq-aside__links a:hover,
.page-faq .faq-aside__links a:focus-visible {
  color: var(--bys-amber);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(24px, 3vw, 44px);
  }

  .page-faq .faq-steps__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(18px, 2.4vw, 30px);
  }

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

@media (min-width: 861px) {
  .page-faq .faq-steps__track {
    display: block;
  }

  .page-faq .faq-steps__link {
    padding-right: 28px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 316px;
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }

  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 342px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-steps__dot,
  .page-faq .faq-q__summary::before,
  .page-faq .faq-filter__btn,
  .page-faq .faq-aside__links a {
    transition: none;
  }

  .page-faq .faq-steps__link:hover .faq-steps__dot {
    transform: none;
  }
}