.page-faq {
  display: block;
  color: var(--ink);
  font-family: var(--font-sans);
}

.page-faq .mono {
  font-family: var(--font-mono);
}

/* ---------- 首屏 ---------- */

.page-faq .sup-hero {
  position: relative;
  padding: calc(var(--header-h) + 48px) 0 40px;
  overflow: clip;
}

.page-faq .sup-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--mist) 1px, transparent 1px),
    linear-gradient(to bottom, var(--mist) 1px, transparent 1px);
  background-size: var(--cell) var(--cell);
  opacity: .55;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 82%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 82%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .sup-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .sup-hero .crumbs {
  margin-bottom: 26px;
}

.page-faq .sup-hero h1 {
  margin: 10px 0 0;
  font-size: clamp(38px, 8.6vw, 82px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -.03em;
  color: var(--ink-brown);
  max-width: 16ch;
}

.page-faq .sup-hero .lede {
  margin: 22px 0 0;
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 双线结构图 ---------- */

.page-faq .sup-figure {
  margin: 0 0 8px;
  border: 1px solid var(--mist);
  border-radius: var(--radius-organic);
  background: var(--cloud);
  overflow: hidden;
}

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

.page-faq .sup-figure .frame__caption {
  display: block;
  padding: 12px 18px 14px;
  border-top: 1px dashed var(--mist);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-mute);
}

/* ---------- 问答主体 ---------- */

.page-faq .sup-qa {
  padding: 60px 0 72px;
}

.page-faq .sup-qa__layout {
  display: grid;
  gap: 30px;
}

.page-faq .sup-lanes {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .sup-lane {
  position: relative;
  display: block;
  padding: 18px 18px 18px 24px;
  border: 1px solid var(--mist);
  border-radius: var(--radius-organic);
  background: var(--cream);
  text-decoration: none;
  color: inherit;
  transition: background var(--ease), border-color var(--ease), transform var(--ease);
}

.page-faq .sup-lane::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--sky);
  transition: background var(--ease);
}

.page-faq .sup-lane--train::before {
  background: var(--flame);
}

.page-faq .sup-lane__no {
  display: block;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--flame);
  transition: color var(--ease);
}

.page-faq .sup-lane--train .sup-lane__no {
  color: var(--sky-deep);
}

.page-faq .sup-lane__t {
  display: block;
  margin: 5px 0 7px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink-brown);
  transition: color var(--ease);
}

.page-faq .sup-lane__d {
  display: block;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--ink-mute);
  transition: color var(--ease);
}

.page-faq .sup-lane:hover,
.page-faq .sup-lane:focus-visible {
  background: var(--sky);
  border-color: var(--sky);
  transform: translateX(3px);
  outline: none;
}

.page-faq .sup-lane:hover::before,
.page-faq .sup-lane:focus-visible::before {
  background: var(--green);
}

.page-faq .sup-lane:hover .sup-lane__t,
.page-faq .sup-lane:hover .sup-lane__d,
.page-faq .sup-lane:hover .sup-lane__no,
.page-faq .sup-lane:focus-visible .sup-lane__t,
.page-faq .sup-lane:focus-visible .sup-lane__d,
.page-faq .sup-lane:focus-visible .sup-lane__no {
  color: #fff;
}

.page-faq .sup-lanes__foot {
  margin: 4px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--grid);
  background: var(--cloud);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-faq .sup-lanes__foot a {
  color: var(--sky-deep);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--green);
  text-underline-offset: 3px;
}

.page-faq .sup-qa__panels {
  min-width: 0;
}

.page-faq .sup-group {
  margin-bottom: 52px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

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

.page-faq .sup-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--ink-brown);
}

.page-faq .sup-group__no {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--flame);
}

.page-faq .sup-group__title {
  margin: 0;
  font-size: clamp(21px, 3.2vw, 29px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--ink-brown);
}

.page-faq .sup-group__intro {
  margin: 0 0 20px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* 课程阶梯 */

.page-faq .sup-steps {
  display: grid;
  gap: 12px;
  margin: 0 0 24px;
}

.page-faq .sup-step {
  padding: 16px 18px;
  border: 1px solid var(--mist);
  border-left: 3px solid var(--sky);
  border-radius: var(--radius-organic);
  background: var(--cream);
  transition: transform var(--ease), border-color var(--ease), background var(--ease), box-shadow var(--ease);
}

.page-faq .sup-step--1 { border-left-color: var(--grid); }
.page-faq .sup-step--3 { border-left-color: var(--flame); }

.page-faq .sup-step:hover,
.page-faq .sup-step:focus-within {
  transform: translateY(-3px);
  border-color: var(--green);
  background: #fff;
  box-shadow: var(--shadow);
}

.page-faq .sup-step__lv {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--sky-deep);
}

.page-faq .sup-step__t {
  margin: 6px 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink-brown);
}

.page-faq .sup-step__d {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .sup-step__x {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--mist);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-mute);
}

/* 折叠问答 */

.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--mist);
  border-radius: var(--radius-organic);
  background: var(--cream);
  transition: border-color var(--ease), background var(--ease);
}

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

.page-faq .qa:hover {
  border-color: var(--green);
}

.page-faq .qa[open] {
  border-color: var(--sky);
  background: var(--cloud);
}

.page-faq .qa > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--ink);
  transition: color var(--ease);
}

.page-faq .qa > summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa[open] > summary {
  color: var(--sky-deep);
}

.page-faq .qa__no {
  flex: none;
  min-width: 30px;
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--flame);
}

.page-faq .qa__q {
  flex: 1;
  min-width: 0;
}

.page-faq .qa__mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 5px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 12px;
  height: 2px;
  border-radius: 2px;
  background: var(--sky);
  transform: translate(-50%, -50%);
  transition: transform var(--ease), background var(--ease);
}

.page-faq .qa__mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .qa[open] .qa__mark::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--green);
}

.page-faq .qa__body {
  padding: 0 18px 18px 62px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

/* ---------- 指引 ---------- */

.page-faq .sup-guide {
  padding: 64px 0;
}

.page-faq .sup-guide .grid {
  gap: 32px;
  align-items: start;
}

.page-faq .sup-guide__cover {
  position: relative;
  border: 1px solid var(--grid);
  border-radius: var(--radius-organic);
  overflow: hidden;
  background: var(--ink);
}

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

.page-faq .sup-guide__year {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 6px 14px;
  border-left: 3px solid var(--flame);
  border-radius: 0 6px 6px 0;
  background: rgba(31, 42, 54, .84);
  color: var(--cream);
  font-size: 26px;
  letter-spacing: .06em;
}

.page-faq .sup-guide__body h2 {
  margin: 8px 0 16px;
  font-size: clamp(23px, 3.4vw, 32px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.28;
  color: var(--ink-brown);
}

.page-faq .sup-guide__body > p {
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-faq .sup-toc {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
}

.page-faq .sup-toc li {
  display: grid;
  grid-template-columns: 52px 1fr auto;
  gap: 10px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px dashed var(--mist);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .sup-toc li:first-child {
  border-top: 1px dashed var(--mist);
}

.page-faq .sup-toc li > span:first-child {
  font-size: 12px;
  color: var(--sky-deep);
}

.page-faq .sup-toc li > span:last-child {
  font-size: 12px;
  color: var(--ink-mute);
}

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

.page-faq .sup-guide__forms li {
  padding: 12px 16px;
  border: 1px solid var(--mist);
  border-radius: var(--radius-organic);
  background: var(--cream);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .sup-guide__forms strong {
  color: var(--ink-brown);
  font-weight: 800;
}

.page-faq .sup-guide__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mute);
}

.page-faq .sup-guide__note a {
  color: var(--sky-deep);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--green);
  text-underline-offset: 3px;
}

/* ---------- 账号与权限 ---------- */

.page-faq .sup-access {
  padding: 64px 0;
  background: var(--cloud);
}

.page-faq .sup-access .grid {
  gap: 32px;
  align-items: start;
}

.page-faq .sup-access__sub {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink-brown);
}

.page-faq .sup-access__sub:not(:first-child) {
  margin-top: 30px;
}

.page-faq .sup-access__main p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-faq .sup-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: supflow;
}

.page-faq .sup-flow li {
  position: relative;
  padding: 14px 0 14px 42px;
  border-bottom: 1px dashed var(--mist);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.page-faq .sup-flow li:first-child {
  border-top: 1px dashed var(--mist);
}

.page-faq .sup-flow li::before {
  counter-increment: supflow;
  content: counter(supflow, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--flame);
}

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

.page-faq .sup-warn li {
  position: relative;
  padding: 13px 16px 13px 38px;
  border-left: 3px solid var(--flame);
  border-radius: 0 var(--radius-organic) var(--radius-organic) 0;
  background: var(--paper);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .sup-warn li::before {
  content: "!";
  position: absolute;
  left: 14px;
  top: 13px;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--flame);
}

/* ---------- 故障与响应 ---------- */

.page-faq .sup-incident {
  padding: 64px 0;
  color: var(--on-dark);
}

.page-faq .sup-incident .sec-head__title {
  color: var(--cream);
}

.page-faq .sup-incident .sec-head__desc {
  color: var(--on-dark-soft);
}

.page-faq .sup-sla {
  display: grid;
  gap: 14px;
  margin: 30px 0 42px;
}

.page-faq .sup-sla__item {
  padding: 18px 20px;
  border: 1px solid rgba(169, 196, 214, .28);
  border-radius: var(--radius-organic);
  background: rgba(253, 251, 246, .05);
}

.page-faq .sup-sla__num {
  display: block;
  font-size: clamp(26px, 4.4vw, 38px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--green);
}

.page-faq .sup-sla__lbl {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-faq .sup-incident__sub {
  margin: 0 0 18px;
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--cream);
}

.page-faq .sup-fix {
  display: grid;
  gap: 14px;
}

.page-faq .sup-fix__card {
  padding: 20px;
  border: 1px solid rgba(169, 196, 214, .3);
  border-radius: var(--radius-organic);
  background: rgba(253, 251, 246, .05);
  transition: border-color var(--ease), background var(--ease), transform var(--ease);
}

.page-faq .sup-fix__card:hover {
  transform: translateY(-2px);
  border-color: var(--green);
  background: rgba(253, 251, 246, .1);
}

.page-faq .sup-fix__tag {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 12px;
  border: 1px solid var(--green);
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--green);
}

.page-faq .sup-fix__list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--on-dark);
}

.page-faq .sup-fix__list li::marker {
  color: var(--flame);
  font-family: var(--font-mono);
  font-size: 12px;
}

/* ---------- 收束 CTA ---------- */

.page-faq .sup-cta {
  padding: 0 0 76px;
}

.page-faq .sup-cta__box {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 26px;
  padding: 34px 24px;
  border-radius: var(--radius-organic);
  background: linear-gradient(118deg, var(--sky-deep) 0%, var(--sky) 62%, #4E9ABF 100%);
  color: var(--cream);
}

.page-faq .sup-cta__box::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -110px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(61, 220, 132, .3), transparent 68%);
  pointer-events: none;
}

.page-faq .sup-cta__lead,
.page-faq .sup-cta__actions {
  position: relative;
  z-index: 1;
}

.page-faq .sup-cta__lead .eyebrow {
  color: rgba(253, 251, 246, .82);
}

.page-faq .sup-cta__lead h2 {
  margin: 10px 0 14px;
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 900;
  letter-spacing: -.025em;
  line-height: 1.2;
  color: var(--cream);
}

.page-faq .sup-cta__lead p {
  margin: 0 0 18px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(253, 251, 246, .9);
}

.page-faq .sup-cta__need {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .sup-cta__need li {
  padding: 6px 14px;
  border: 1px solid rgba(253, 251, 246, .45);
  border-radius: 999px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--cream);
}

.page-faq .sup-cta__actions {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .sup-cta .btn--primary {
  background: var(--cream);
  border-color: var(--cream);
  color: var(--sky-deep);
}

.page-faq .sup-cta .btn--primary:hover,
.page-faq .sup-cta .btn--primary:focus-visible {
  background: #fff;
  border-color: var(--green);
  color: var(--sky-deep);
}

.page-faq .sup-cta .btn--ghost {
  color: var(--cream);
  border-color: rgba(253, 251, 246, .5);
}

.page-faq .sup-cta .btn--ghost:hover,
.page-faq .sup-cta .btn--ghost:focus-visible {
  border-color: var(--cream);
  background: rgba(253, 251, 246, .12);
  color: var(--cream);
}

.page-faq .sup-cta__hint {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(253, 251, 246, .78);
}

/* ---------- 响应式 ---------- */

@media (max-width: 519px) {
  .page-faq .qa__body {
    padding-left: 18px;
  }

  .page-faq .sup-toc li {
    grid-template-columns: 46px 1fr;
  }

  .page-faq .sup-toc li > span:last-child {
    grid-column: 2;
  }
}

@media (min-width: 640px) {
  .page-faq .sup-sla {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .sup-cta__box {
    padding: 44px 36px;
  }
}

@media (min-width: 760px) {
  .page-faq .sup-steps {
    grid-template-columns: repeat(3, 1fr);
    align-items: end;
  }

  .page-faq .sup-step--1 { min-height: 168px; }
  .page-faq .sup-step--2 { min-height: 196px; }
  .page-faq .sup-step--3 { min-height: 224px; }

  .page-faq .sup-fix {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .sup-cta__actions {
    align-content: center;
  }
}

@media (min-width: 900px) {
  .page-faq .sup-qa__layout {
    grid-template-columns: 310px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .sup-lanes {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .sup-guide .grid {
    gap: 52px;
  }

  .page-faq .sup-access .grid {
    gap: 52px;
  }

  .page-faq .sup-cta__box {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .95fr);
    align-items: center;
    padding: 52px 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .sup-lane,
  .page-faq .sup-step,
  .page-faq .qa,
  .page-faq .sup-fix__card,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after {
    transition: none;
  }

  .page-faq .sup-lane:hover,
  .page-faq .sup-lane:focus-visible,
  .page-faq .sup-step:hover,
  .page-faq .sup-fix__card:hover {
    transform: none;
  }
}