/* ============ 帮助中心 page-faq ============ */
.page-faq {
  --faq-cut: 20px;
  --faq-gap: clamp(18px, 2.6vw, 30px);
  --faq-panel: linear-gradient(158deg, #1C2433 0%, #142338 100%);
  --faq-soft: rgba(242, 246, 251, .84);
  padding-bottom: clamp(56px, 8vw, 104px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4.5vw, 52px) 0 clamp(22px, 3.6vw, 44px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -30% -12% auto -12%;
  height: 170%;
  background:
    radial-gradient(58% 68% at 10% 18%, rgba(164, 92, 255, .30), transparent 68%),
    radial-gradient(48% 62% at 90% 6%, rgba(255, 122, 47, .26), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(116deg, rgba(126, 147, 174, .16) 0 1px, transparent 1px 24px);
  opacity: .75;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  max-width: 15em;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.85;
  color: var(--faq-soft);
}

.page-faq .faq-hero__jump {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-hero__jump a {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  transition: transform .22s ease, background-color .22s ease;
}

.page-faq .faq-hero__jump a:hover,
.page-faq .faq-hero__jump a:focus-visible {
  transform: translateY(-2px);
}

/* ---------- 主栅格：目录 + 问答流 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  margin-top: clamp(20px, 3.4vw, 40px);
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(210px, 262px) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 58px);
    align-items: start;
  }
}

/* ---------- 问题目录 ---------- */
.page-faq .faq-toc__inner {
  border-top: 2px solid var(--c-orange);
  padding-top: 16px;
}

@media (min-width: 960px) {
  .page-faq .faq-toc__inner {
    position: sticky;
    top: 112px;
    max-height: calc(100vh - 150px);
    overflow-y: auto;
    padding-right: 6px;
  }
}

.page-faq .faq-toc__cap {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .faq-toc__search {
  margin-bottom: 16px;
}

.page-faq .faq-toc__label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-mist);
}

.page-faq .filter-input {
  width: 100%;
  box-sizing: border-box;
  padding: 10px 12px;
  background: var(--c-ink-2);
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.4;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.page-faq .filter-input::placeholder {
  color: rgba(126, 147, 174, .8);
}

.page-faq .filter-input:focus {
  border-color: var(--c-orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 47, .18);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  counter-reset: none;
}

.page-faq .faq-toc__list a {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 7px 8px 7px 6px;
  color: rgba(242, 246, 251, .78);
  font-size: 13.5px;
  line-height: 1.5;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-faq .faq-toc__list a .mono {
  color: rgba(126, 147, 174, .85);
  font-size: 11px;
  letter-spacing: .08em;
}

.page-faq .faq-toc__list a:hover,
.page-faq .faq-toc__list a:focus-visible {
  color: var(--c-white);
  border-left-color: var(--c-orange);
  background: rgba(255, 122, 47, .08);
}

.page-faq .faq-toc__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed rgba(126, 147, 174, .3);
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(126, 147, 174, .95);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  min-width: 0;
}

.page-faq .faq-group {
  display: grid;
  gap: 12px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto auto minmax(0, 1fr);
  align-items: center;
  gap: 12px;
}

.page-faq .faq-group__idx {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--c-white);
}

.page-faq .faq-group__line {
  display: block;
  height: 1px;
  background: repeating-linear-gradient(115deg, rgba(126, 147, 174, .5) 0 6px, transparent 6px 14px);
}

/* ---------- 问答卡 ---------- */
.page-faq .qa-card {
  position: relative;
  background: var(--faq-panel);
  border-left: 3px solid rgba(164, 92, 255, .55);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  padding: 16px clamp(16px, 2.4vw, 26px) 14px;
  transition: border-color .25s ease, background-color .25s ease;
}

.page-faq .qa-card:hover {
  border-left-color: var(--c-orange);
}

.page-faq .qa-card[open] {
  border-left-color: var(--c-orange);
}

.page-faq .qa-card__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 18px;
  gap: 16px;
  align-items: start;
  cursor: pointer;
  list-style: none;
  padding-bottom: 10px;
}

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

.page-faq .qa-card[open] .qa-card__head {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa-card__q {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(15.5px, 2.1vw, 19px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -.008em;
  color: var(--c-white);
}

.page-faq .qa-card__mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .qa-card__mark::before,
.page-faq .qa-card__mark::after {
  content: "";
  position: absolute;
  background: var(--c-mist);
  transition: transform .25s ease, background-color .25s ease;
}

.page-faq .qa-card__mark::before {
  left: 0;
  right: 0;
  top: 7px;
  height: 2px;
}

.page-faq .qa-card__mark::after {
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
}

.page-faq .qa-card[open] .qa-card__mark::before {
  background: var(--c-orange);
}

.page-faq .qa-card[open] .qa-card__mark::after {
  transform: scaleY(0);
}

.page-faq .qa-card__body {
  padding: 14px 0 4px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--faq-soft);
  animation: faqBodyIn .28s ease both;
}

@keyframes faqBodyIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

.page-faq .qa-card__body p {
  margin: 0 0 10px;
  max-width: 42em;
}

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

.page-faq .qa-card__body a {
  color: var(--c-orange);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa-card__body b {
  color: var(--c-white);
  font-weight: 700;
}

.page-faq .hl {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--c-white);
  padding: 0 3px;
  background: linear-gradient(transparent 58%, rgba(255, 210, 74, .45) 58%);
}

.page-faq .qa-list {
  list-style: none;
  margin: 4px 0 12px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .qa-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .qa-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 2px;
  background: var(--c-orange);
}

.page-faq .qa-steps {
  list-style: none;
  counter-reset: none;
  margin: 4px 0 12px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .qa-steps li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 8px 12px;
  background: rgba(14, 42, 79, .72);
  border-left: 2px solid var(--c-cyan);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .qa-steps li .mono {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-cyan);
}

/* ---------- 编号墙 ---------- */
.page-faq .numwall {
  position: relative;
  overflow: hidden;
  margin: 18px 0 16px;
  padding: clamp(16px, 2.8vw, 28px);
  background: var(--c-ink-2);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}

.page-faq .numwall__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .16;
  filter: saturate(.75) contrast(1.05);
}

.page-faq .numwall > *:not(.numwall__bg) {
  position: relative;
  z-index: 1;
}

.page-faq .numwall__cap {
  margin: 0;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-purple);
}

.page-faq .numwall__code {
  margin: 8px 0 18px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 5.6vw, 44px);
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.page-faq .numwall__seg--year { color: var(--c-cyan); }
.page-faq .numwall__seg--area { color: var(--c-purple); }
.page-faq .numwall__seg--sn { color: var(--c-orange); }
.page-faq .numwall__dash { color: var(--c-mist); }

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

.page-faq .numwall__legend li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 246, 251, .84);
}

.page-faq .numwall__legend b {
  color: var(--c-white);
}

.page-faq .numwall__dot {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-top: 3px;
  font-size: 11px;
  border: 1px solid currentColor;
}

.page-faq .numwall__dot--year { color: var(--c-cyan); }
.page-faq .numwall__dot--area { color: var(--c-purple); }
.page-faq .numwall__dot--sn { color: var(--c-orange); }

.page-faq .numwall__actions {
  margin: 0 0 16px;
}

.page-faq .numwall__copy {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: transparent;
  border: 1px solid var(--c-orange);
  color: var(--c-orange);
  font-family: var(--font-body);
  font-size: 13px;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease;
}

.page-faq .numwall__copy:hover,
.page-faq .numwall__copy:focus-visible {
  background: var(--c-orange);
  color: var(--c-ink);
}

.page-faq .numwall__flag,
.page-faq .faq-cta__flag {
  font-size: 12px;
  color: var(--c-yellow);
  opacity: 0;
  transition: opacity .2s ease;
}

.page-faq .numwall__copy:hover .numwall__flag,
.page-faq .numwall__copy[data-copied] .numwall__flag,
.page-faq .faq-cta__contact .copy-btn[data-copied] .faq-cta__flag {
  opacity: 1;
}

.page-faq .numwall__matrix {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px dashed rgba(126, 147, 174, .34);
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(146px, 1fr));
  gap: 6px 14px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11.5px;
  letter-spacing: .07em;
  color: rgba(126, 147, 174, .7);
}

/* ---------- 流程横带 ---------- */
.page-faq .faq-flow {
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, rgba(14, 42, 79, .92), rgba(28, 36, 51, .96));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: clamp(22px, 3.4vw, 36px) clamp(18px, 3vw, 34px);
}

.page-faq .faq-flow__figure {
  margin: 0 0 22px;
  height: clamp(120px, 22vw, 200px);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

.page-faq .faq-flow__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .62;
  filter: saturate(.9);
}

.page-faq .faq-flow__content {
  position: relative;
}

.page-faq .faq-flow__title {
  margin: 10px 0 20px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.8vw, 28px);
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.25;
  color: var(--c-white);
}

.page-faq .faq-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

@media (min-width: 720px) {
  .page-faq .faq-flow__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-faq .faq-flow__step {
  position: relative;
  padding: 14px 0 0;
  border-top: 2px solid rgba(63, 193, 201, .55);
}

.page-faq .faq-flow__step:nth-child(2) {
  border-top-color: rgba(164, 92, 255, .6);
}

.page-faq .faq-flow__step:nth-child(3) {
  border-top-color: rgba(255, 122, 47, .75);
}

.page-faq .faq-flow__node {
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--c-cyan);
}

.page-faq .faq-flow__step:nth-child(2) .faq-flow__node {
  color: var(--c-purple);
}

.page-faq .faq-flow__step:nth-child(3) .faq-flow__node {
  color: var(--c-orange);
}

.page-faq .faq-flow__name {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--c-white);
}

.page-faq .faq-flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 246, 251, .78);
}

/* ---------- 收尾联系 ---------- */
.page-faq .faq-cta {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.4vw, 38px) clamp(18px, 3vw, 34px);
  background:
    radial-gradient(70% 120% at 92% 0%, rgba(255, 122, 47, .22), transparent 68%),
    linear-gradient(150deg, #16233a, #0E2A4F);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-faq .faq-cta__title {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.25;
  color: var(--c-white);
}

.page-faq .faq-cta__text {
  margin: 0 0 20px;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--faq-soft);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.page-faq .faq-cta__contact {
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px dashed rgba(126, 147, 174, .34);
  display: grid;
  gap: 12px;
}

.page-faq .faq-cta__contact li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
}

.page-faq .faq-cta__k {
  min-width: 40px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-mist);
}

.page-faq .faq-cta__v {
  font-size: 14.5px;
  letter-spacing: .04em;
  color: var(--c-white);
  overflow-wrap: anywhere;
}

.page-faq .faq-cta__contact .copy-btn {
  padding: 4px 10px;
  font-size: 12px;
  background: transparent;
  border: 1px solid rgba(126, 147, 174, .5);
  color: var(--c-mist);
  cursor: pointer;
  transition: border-color .2s ease, color .2s ease;
}

.page-faq .faq-cta__contact .copy-btn:hover,
.page-faq .faq-cta__contact .copy-btn:focus-visible {
  border-color: var(--c-orange);
  color: var(--c-orange);
}

.page-faq .faq-cta__contact .copy-btn > span:first-child {
  margin-right: 6px;
}

/* ---------- 响应式微调 ---------- */
@media (max-width: 719px) {
  .page-faq .faq-card {
    clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  }

  .page-faq .numwall__code {
    letter-spacing: .04em;
  }

  .page-faq .qa-steps li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .page-faq .faq-cta {
    clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-card__body {
    animation: none;
  }

  .page-faq .faq-hero__jump a:hover,
  .page-faq .faq-hero__jump a:focus-visible {
    transform: none;
  }
}