.page-faq {
  --faq-teal: #0f7d76;
  --faq-paper-ink: #101820;
  background: var(--c-space);
  color: var(--c-white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 4vw, 42px) 0 clamp(36px, 6vw, 76px);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(118deg, rgba(13, 43, 69, 0.96) 0%, rgba(13, 43, 69, 0.58) 40%, rgba(7, 26, 47, 0) 72%),
    radial-gradient(120% 90% at 88% 4%, rgba(24, 214, 200, 0.22), transparent 62%),
    radial-gradient(90% 70% at 4% 96%, rgba(183, 255, 60, 0.12), transparent 60%);
  pointer-events: none;
}
.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}
.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(34px, 6.6vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 900;
  max-width: 15em;
}
.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.78;
  color: rgba(234, 246, 247, 0.84);
}
.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 30px;
  margin: 30px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.page-faq .faq-stat dt {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-slate);
}
.page-faq .faq-stat dd {
  margin: 5px 0 0;
  font-size: 22px;
  line-height: 1;
  color: var(--c-lime);
}
.page-faq .faq-hero__media {
  margin: 0;
  aspect-ratio: 14 / 10;
  border: 1px solid var(--line-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}
.page-faq .faq-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 章节标题 ---------- */
.page-faq .faq-sec-head {
  max-width: 64em;
  margin-bottom: clamp(20px, 3vw, 34px);
}
.page-faq .faq-sec-head__title {
  margin: 10px 0 12px;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 800;
}
.page-faq .faq-sec-head__note {
  margin: 0;
  max-width: 46em;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(234, 246, 247, 0.74);
}

/* ---------- 分类索引墙 ---------- */
.page-faq .faq-index {
  border-top: 1px solid var(--line);
}
.page-faq .faq-index__grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
.page-faq .faq-cat {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 152px;
  padding: clamp(18px, 2vw, 24px);
  background: linear-gradient(155deg, rgba(24, 214, 200, 0.12), rgba(13, 43, 69, 0.92) 48%);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  color: var(--c-white);
  text-decoration: none;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
}
.page-faq .faq-cat:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-1);
  background: linear-gradient(155deg, rgba(24, 214, 200, 0.26), rgba(13, 43, 69, 0.96) 52%);
}
.page-faq .faq-cat:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: 3px;
}
.page-faq .faq-cat__num {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--c-cyan);
}
.page-faq .faq-cat__name {
  font-size: 19px;
  font-weight: 800;
  line-height: 1.3;
}
.page-faq .faq-cat__hint {
  flex: 1;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--c-slate);
}
.page-faq .faq-cat__count {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-lime);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .faq-answers {
  border-top: 1px solid var(--line);
}
.page-faq .faq-answers__layout {
  display: grid;
  gap: 22px;
}
.page-faq .faq-rail {
  border-left: 2px solid var(--line-cyan);
  padding-left: 14px;
}
.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-cyan);
}
.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-faq .faq-rail__link {
  display: inline-block;
  padding: 6px 10px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-slate);
  border: 1px solid var(--line);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-faq .faq-rail__link:hover {
  color: var(--c-cyan);
  border-color: var(--line-cyan);
}
.page-faq .faq-rail__link:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: 2px;
}
.page-faq .faq-grp {
  margin: 28px 0 12px;
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--c-lime);
}
.page-faq .faq-answers__main .faq-grp:first-of-type {
  margin-top: 0;
}
.page-faq .faq-q {
  background: var(--c-paper);
  color: var(--faq-paper-ink);
  border: 1px solid rgba(16, 24, 32, 0.14);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  margin-bottom: 10px;
  transition: box-shadow 0.25s var(--ease);
}
.page-faq .faq-q[open] {
  box-shadow: inset 3px 0 0 var(--c-cyan);
}
.page-faq .faq-q summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 18px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-q summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-q summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--faq-teal);
}
.page-faq .faq-q[open] summary::after {
  content: "–";
}
.page-faq .faq-q summary:focus-visible {
  outline: 2px solid var(--faq-teal);
  outline-offset: -4px;
}
.page-faq .faq-q__body {
  padding: 0 18px 16px;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(16, 24, 32, 0.8);
}
.page-faq .faq-q__body p {
  margin: 0 0 8px;
}
.page-faq .faq-q__body p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-q__body a {
  color: var(--faq-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 注册对照四步 ---------- */
.page-faq .faq-reg {
  background: var(--c-paper);
  color: var(--faq-paper-ink);
}
.page-faq .faq-reg .eyebrow {
  color: var(--faq-teal);
}
.page-faq .faq-reg__head {
  display: grid;
  gap: 24px;
  align-items: center;
}
.page-faq .faq-reg__title {
  margin: 10px 0 14px;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--faq-paper-ink);
}
.page-faq .faq-reg__intro {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(16, 24, 32, 0.76);
}
.page-faq .faq-reg__media {
  margin: 0;
  aspect-ratio: 12 / 7;
  border: 1px solid rgba(16, 24, 32, 0.2);
  background: var(--c-space);
}
.page-faq .faq-reg__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-faq .faq-steps {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.page-faq .faq-step {
  padding-top: 18px;
  border-top: 2px solid rgba(16, 24, 32, 0.16);
}
.page-faq .faq-step:first-child {
  border-top-color: var(--faq-teal);
}
.page-faq .faq-step__num {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--faq-teal);
}
.page-faq .faq-step__title {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.35;
  color: var(--faq-paper-ink);
}
.page-faq .faq-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(16, 24, 32, 0.76);
}
.page-faq .faq-reg__tail {
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(16, 24, 32, 0.16);
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(16, 24, 32, 0.8);
}
.page-faq .faq-reg__tail a {
  color: var(--faq-teal);
  font-weight: 700;
  text-underline-offset: 3px;
}

/* ---------- 移动端排查 ---------- */
.page-faq .faq-mobile {
  border-top: 1px solid var(--line);
}
.page-faq .faq-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-faq .faq-check__item {
  display: flex;
  gap: 14px;
  padding: 18px;
  background: rgba(13, 43, 69, 0.74);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}
.page-faq .faq-check__item:first-child {
  border-color: var(--line-lime);
  background: linear-gradient(150deg, rgba(183, 255, 60, 0.14), rgba(13, 43, 69, 0.86) 58%);
}
.page-faq .faq-check__num {
  flex: none;
  font-size: 20px;
  line-height: 1;
  color: var(--c-cyan);
}
.page-faq .faq-check__item:first-child .faq-check__num {
  color: var(--c-lime);
}
.page-faq .faq-check__title {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
}
.page-faq .faq-check__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(234, 246, 247, 0.76);
}
.page-faq .faq-check__item a {
  color: var(--c-cyan);
  text-underline-offset: 3px;
}

/* ---------- 换设备 ---------- */
.page-faq .faq-switch {
  background: linear-gradient(120deg, var(--c-ink) 0%, var(--c-space) 62%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-switch__grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
.page-faq .faq-switch__card {
  padding: 22px;
  background: rgba(7, 26, 47, 0.7);
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-orange);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.page-faq .faq-switch__card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-1);
}
.page-faq .faq-switch__tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 8px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--c-space);
  background: var(--c-orange);
}
.page-faq .faq-switch__card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.4;
}
.page-faq .faq-switch__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(234, 246, 247, 0.78);
}

/* ---------- 资料格式 ---------- */
.page-faq .faq-dl {
  background: var(--c-paper);
  color: var(--faq-paper-ink);
}
.page-faq .faq-dl .eyebrow {
  color: var(--faq-teal);
}
.page-faq .faq-dl .faq-sec-head__title {
  color: var(--faq-paper-ink);
}
.page-faq .faq-dl .faq-sec-head__note {
  color: rgba(16, 24, 32, 0.76);
}
.page-faq .faq-formats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
.page-faq .faq-format {
  padding: 18px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(16, 24, 32, 0.14);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}
.page-faq .faq-format__ext {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 8px;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--c-lime);
  background: var(--c-space);
}
.page-faq .faq-format h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
  color: var(--faq-paper-ink);
}
.page-faq .faq-format p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(16, 24, 32, 0.74);
}
.page-faq .faq-format__meta {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--faq-teal);
}
.page-faq .faq-dl__tail {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(16, 24, 32, 0.16);
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(16, 24, 32, 0.8);
}
.page-faq .faq-dl__tail a {
  color: var(--faq-teal);
  font-weight: 700;
  text-underline-offset: 3px;
}

/* ---------- 咨询前准备 ---------- */
.page-faq .faq-prep__inner {
  display: grid;
  gap: 28px;
}
.page-faq .faq-prep__title {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.page-faq .faq-prep__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-faq .faq-prep__list li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(234, 246, 247, 0.84);
}
.page-faq .faq-prep__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 14px;
  height: 2px;
  background: var(--c-lime);
}
.page-faq .faq-prep__list strong {
  color: var(--c-white);
}
.page-faq .faq-prep__note {
  margin: 20px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(234, 246, 247, 0.7);
}
.page-faq .faq-prep__box {
  padding: 22px;
  background: rgba(13, 43, 69, 0.72);
  border: 1px solid var(--line-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}
.page-faq .faq-prep__box-title {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c-cyan);
}
.page-faq .faq-prep__row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}
.page-faq .faq-prep__row:first-of-type {
  border-top: 0;
  padding-top: 0;
}
.page-faq .faq-prep__key {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-slate);
}
.page-faq .faq-prep__val {
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-white);
  word-break: break-word;
}
.page-faq .faq-prep__cta {
  margin-top: 18px;
  width: 100%;
  justify-content: center;
  text-align: center;
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-switch__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-formats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }
  .page-faq .faq-reg__head {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
  .page-faq .faq-check {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .faq-switch__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-faq .faq-prep__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-formats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-faq .faq-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-answers__layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }
  .page-faq .faq-rail__list {
    flex-direction: column;
  }
  .page-faq .faq-rail__link {
    display: block;
    border-color: transparent;
    border-bottom: 1px solid var(--line);
    padding: 8px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-q,
  .page-faq .faq-switch__card,
  .page-faq .faq-rail__link {
    transition: none;
  }
  .page-faq .faq-cat:hover,
  .page-faq .faq-switch__card:hover {
    transform: none;
  }
}