.page-faq {
  --faq-rail: 236px;
  --faq-line: rgba(233, 242, 239, .13);
  --faq-line-soft: rgba(233, 242, 239, .06);
  --faq-indent: 0px;
  --faq-panel: rgba(22, 48, 42, .55);
  position: relative;
  overflow-x: clip;
  background: var(--emc-ink);
  color: var(--emc-white);
  padding-bottom: clamp(48px, 8vw, 108px);
}

@media (min-width: 700px) {
  .page-faq { --faq-indent: 34px; }
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.6vw, 58px) 0 clamp(20px, 3.4vw, 36px);
}
.page-faq .faq-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(233, 242, 239, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(233, 242, 239, .05) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 76%);
  pointer-events: none;
}
.page-faq .faq-hero__glow {
  position: absolute;
  top: -18%;
  right: -14%;
  width: min(720px, 74%);
  height: 420px;
  background:
    radial-gradient(58% 58% at 68% 42%, rgba(43, 231, 200, .17), transparent 70%),
    radial-gradient(52% 52% at 24% 74%, rgba(138, 107, 255, .15), transparent 72%);
  pointer-events: none;
}
.page-faq .faq-hero__inner {
  position: relative;
}
.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-family: var(--emc-font-head);
  font-size: clamp(42px, 8.4vw, 84px);
  font-weight: 800;
  line-height: .94;
  letter-spacing: -.035em;
  color: var(--emc-white);
}
.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 38em;
  font-size: clamp(16px, 1.2vw, 18px);
  line-height: 1.78;
  letter-spacing: .012em;
  color: rgba(233, 242, 239, .78);
}

/* 首屏指标 */
.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}
@media (min-width: 780px) {
  .page-faq .faq-stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.page-faq .faq-stats__item {
  padding: 14px 14px 16px;
  background: linear-gradient(160deg, rgba(22, 48, 42, .78), rgba(11, 31, 26, .5));
  border-top: 2px solid var(--emc-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 15px), calc(100% - 15px) 100%, 0 100%);
}
.page-faq .faq-stats__item:nth-child(2) { border-top-color: var(--emc-orange); }
.page-faq .faq-stats__item:nth-child(3) { border-top-color: var(--emc-violet); }
.page-faq .faq-stats__item:nth-child(4) { border-top-color: var(--emc-gold); }
.page-faq .faq-stats__num {
  font-family: var(--emc-font-mono);
  font-size: clamp(28px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--emc-white);
}
.page-faq .faq-stats__unit {
  margin-left: 4px;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(233, 242, 239, .6);
}
.page-faq .faq-stats__label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: rgba(233, 242, 239, .62);
}

/* 查找框 */
.page-faq .faq-finder {
  margin-top: clamp(22px, 3vw, 32px);
  max-width: 620px;
}
.page-faq .faq-finder__label {
  display: block;
  margin-bottom: 8px;
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(233, 242, 239, .5);
}
.page-faq .faq-finder__field {
  position: relative;
}
.page-faq .faq-finder__icon {
  position: absolute;
  left: 15px;
  top: 50%;
  width: 18px;
  height: 18px;
  transform: translateY(-50%);
  color: var(--emc-cyan);
  pointer-events: none;
}
.page-faq .faq-finder__input {
  width: 100%;
  box-sizing: border-box;
  padding: 15px 18px 15px 44px;
  font-family: var(--emc-font-body);
  font-size: 16px;
  letter-spacing: .01em;
  color: var(--emc-white);
  background: rgba(11, 31, 26, .72);
  border: 1px solid var(--faq-line);
  border-radius: var(--emc-radius);
  outline: none;
  transition: border-color var(--emc-t-fast) var(--emc-ease), background var(--emc-t-fast) var(--emc-ease);
}
.page-faq .faq-finder__input::placeholder {
  color: rgba(233, 242, 239, .38);
}
.page-faq .faq-finder__input:focus {
  border-color: var(--emc-line-strong);
  background: rgba(22, 48, 42, .8);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.2vw, 52px);
  margin-top: clamp(30px, 4.6vw, 56px);
}
@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 分类锚点 ---------- */
.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--emc-font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(233, 242, 239, .45);
}
.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-faq .faq-rail__list::-webkit-scrollbar { display: none; }
.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  white-space: nowrap;
  font-size: 13.5px;
  letter-spacing: .01em;
  text-decoration: none;
  color: rgba(233, 242, 239, .66);
  border: 1px solid var(--faq-line);
  background: rgba(22, 48, 42, .34);
  border-radius: var(--emc-radius);
  transition: color var(--emc-t-fast) var(--emc-ease),
              border-color var(--emc-t-fast) var(--emc-ease),
              background var(--emc-t-fast) var(--emc-ease);
}
.page-faq .faq-rail__num {
  font-family: var(--emc-font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: rgba(43, 231, 200, .7);
}
.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible,
.page-faq .faq-rail__link.is-active {
  color: var(--emc-white);
  border-color: var(--emc-line-strong);
  background: rgba(43, 231, 200, .09);
}
.page-faq .faq-rail__foot {
  display: none;
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(233, 242, 239, .45);
}

@media (min-width: 960px) {
  .page-faq .faq-rail__inner {
    position: sticky;
    top: calc(var(--emc-header-offset) + 18px);
  }
  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .faq-rail__link {
    width: 100%;
    box-sizing: border-box;
    justify-content: flex-start;
    padding: 10px 12px;
    border-color: transparent;
    background: transparent;
    border-left: 2px solid transparent;
    border-radius: 0;
  }
  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible,
  .page-faq .faq-rail__link.is-active {
    background: linear-gradient(90deg, rgba(43, 231, 200, .1), transparent);
    border-left-color: var(--emc-cyan);
    border-color: transparent;
    border-left-color: var(--emc-cyan);
  }
  .page-faq .faq-rail__foot { display: block; }
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--emc-header-offset) + 22px);
}
.page-faq .faq-section + .faq-section {
  margin-top: clamp(38px, 5vw, 74px);
}
.page-faq .faq-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: start;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--faq-line);
}
.page-faq .faq-head__num {
  grid-column: 1;
  grid-row: 1 / span 2;
  padding-top: 6px;
  font-family: var(--emc-font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--emc-cyan);
}
.page-faq .faq-head__title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-family: var(--emc-font-head);
  font-size: clamp(22px, 2.7vw, 30px);
  font-weight: 800;
  letter-spacing: -.022em;
  line-height: 1.2;
  color: var(--emc-white);
}
.page-faq .faq-head__note {
  grid-column: 2;
  grid-row: 2;
  margin: 7px 0 0;
  max-width: 36em;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(233, 242, 239, .58);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 20px;
  background: var(--emc-carbon);
  border: 1px solid var(--faq-line);
  overflow: hidden;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .faq-figure__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--faq-line-soft);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: rgba(233, 242, 239, .5);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--faq-line);
  border-left: 2px solid rgba(43, 231, 200, .26);
  border-radius: var(--emc-radius);
  background: linear-gradient(180deg, rgba(22, 48, 42, .44), rgba(11, 31, 26, .28));
  transition: border-color var(--emc-t-base) var(--emc-ease),
              background var(--emc-t-base) var(--emc-ease);
}
.page-faq .faq-item:hover {
  border-left-color: rgba(43, 231, 200, .6);
}
.page-faq .faq-item[open] {
  border-left-color: var(--emc-cyan);
  background: linear-gradient(180deg, rgba(22, 48, 42, .82), rgba(11, 31, 26, .42));
}
.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  column-gap: 12px;
  align-items: start;
  padding: 16px clamp(14px, 2vw, 22px);
  cursor: pointer;
  list-style: none;
  font-family: var(--emc-font-head);
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -.012em;
  color: var(--emc-white);
}
.page-faq .faq-item__q::-webkit-details-marker { display: none; }
.page-faq .faq-item__q::-moz-list-bullet { list-style: none; }
.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--emc-cyan);
  outline-offset: -3px;
}
.page-faq .faq-item__idx {
  padding-top: 5px;
  font-family: var(--emc-font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: rgba(43, 231, 200, .72);
}
.page-faq .faq-item__text { min-width: 0; }
.page-faq .faq-item__sign {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 6px;
}
.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--emc-cyan);
  transform: translate(-50%, -50%);
  transition: transform var(--emc-t-base) var(--emc-ease), opacity var(--emc-t-base) var(--emc-ease);
}
.page-faq .faq-item__sign::before { width: 14px; height: 1.5px; }
.page-faq .faq-item__sign::after { width: 1.5px; height: 14px; }
.page-faq .faq-item[open] .faq-item__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 clamp(14px, 2vw, 22px) 20px calc(clamp(14px, 2vw, 22px) + var(--faq-indent));
  border-top: 1px solid var(--faq-line-soft);
  padding-top: 16px;
  animation: faq-reveal var(--emc-t-slow) var(--emc-ease);
}
@keyframes faq-reveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}
.page-faq .faq-item__lead {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.78;
  letter-spacing: .012em;
  color: var(--emc-white);
}
.page-faq .faq-item__body {
  margin: 11px 0 0;
  font-size: 15.5px;
  line-height: 1.82;
  letter-spacing: .012em;
  color: rgba(233, 242, 239, .72);
}

/* 步骤 */
.page-faq .faq-steps {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faq-step;
}
.page-faq .faq-steps > li {
  counter-increment: faq-step;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 8px;
  padding: 5px 0;
  font-size: 15px;
  line-height: 1.75;
  letter-spacing: .012em;
  color: rgba(233, 242, 239, .72);
}
.page-faq .faq-steps > li::before {
  content: counter(faq-step) ".";
  font-family: var(--emc-font-mono);
  font-size: 13px;
  color: var(--emc-cyan);
}

/* 暖纸对照表 */
.page-faq .faq-keys {
  margin: 14px 0 0;
  padding: 2px;
  background: var(--emc-paper);
  border: 1px solid var(--emc-paper-2);
  border-radius: var(--emc-radius);
}
.page-faq .faq-keys__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 10px 12px;
  border-bottom: 1px solid rgba(214, 205, 188, .75);
}
.page-faq .faq-keys__row:last-child { border-bottom: 0; }
.page-faq .faq-keys__k {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--emc-ink-text);
}
.page-faq .faq-keys__v {
  font-family: var(--emc-font-mono);
  font-size: 14.5px;
  font-weight: 700;
  white-space: nowrap;
  color: var(--emc-ink-text);
}

/* 区块末尾入口 */
.page-faq .faq-next {
  margin: 16px 0 0;
}
.page-faq .faq-next__link {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14.5px;
  letter-spacing: .01em;
  text-decoration: none;
  color: var(--emc-cyan);
  border-bottom: 1px solid rgba(43, 231, 200, .38);
  transition: color var(--emc-t-fast) var(--emc-ease), border-color var(--emc-t-fast) var(--emc-ease);
}
.page-faq .faq-next__link:hover,
.page-faq .faq-next__link:focus-visible {
  color: var(--emc-white);
  border-bottom-color: var(--emc-white);
}

/* ---------- 求助面板 ---------- */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.2vw, 38px);
  background:
    linear-gradient(126deg, rgba(43, 231, 200, .12), rgba(138, 107, 255, .09) 58%, rgba(11, 31, 26, 0) 100%),
    var(--emc-deep);
  border-left: 3px solid var(--emc-cyan);
}
.page-faq .faq-help__arc {
  position: absolute;
  right: -50px;
  bottom: -60px;
  width: 260px;
  height: 260px;
  color: var(--emc-cyan);
  pointer-events: none;
}
.page-faq .faq-help__lead {
  position: relative;
  margin: 0;
  max-width: 34em;
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.8;
  letter-spacing: .012em;
  color: var(--emc-white);
}
.page-faq .faq-help__mail {
  color: var(--emc-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 231, 200, .45);
}
.page-faq .faq-help__mail:hover,
.page-faq .faq-help__mail:focus-visible {
  color: var(--emc-white);
  border-bottom-color: var(--emc-white);
}
.page-faq .faq-help__sub {
  position: relative;
  margin: 20px 0 0;
  font-family: var(--emc-font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(233, 242, 239, .55);
}
.page-faq .faq-help__acts {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.page-faq .faq-cta {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  font-family: var(--emc-font-head);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: .01em;
  text-decoration: none;
  color: var(--emc-ink);
  background: var(--emc-orange);
  border: 1px solid var(--emc-orange);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: transform var(--emc-t-fast) var(--emc-ease), background var(--emc-t-fast) var(--emc-ease);
}
.page-faq .faq-cta:hover,
.page-faq .faq-cta:focus-visible {
  transform: translateY(-2px);
  background: #ff8253;
}
.page-faq .faq-cta--quiet {
  color: var(--emc-white);
  background: transparent;
  border-color: rgba(233, 242, 239, .3);
}
.page-faq .faq-cta--quiet:hover,
.page-faq .faq-cta--quiet:focus-visible {
  background: rgba(233, 242, 239, .08);
  border-color: var(--emc-cyan);
}
.page-faq .faq-help__meta {
  position: relative;
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--faq-line);
}
@media (min-width: 720px) {
  .page-faq .faq-help__meta { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.page-faq .faq-help__meta dt {
  margin-bottom: 5px;
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(233, 242, 239, .48);
}
.page-faq .faq-help__meta dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: rgba(233, 242, 239, .85);
  word-break: break-word;
}
.page-faq .faq-mono {
  font-family: var(--emc-font-mono);
  letter-spacing: .01em;
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 480px) {
  .page-faq .faq-stats__item { padding: 12px 11px 14px; }
  .page-faq .faq-item__q { font-size: 16px; column-gap: 9px; }
  .page-faq .faq-help { border-left-width: 2px; }
  .page-faq .faq-cta { width: 100%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a { animation: none; }
  .page-faq .faq-cta:hover,
  .page-faq .faq-cta:focus-visible { transform: none; }
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after { transition: none; }
}