.page-faq {
  --faq-cut: 14px;
  --faq-index-w: 232px;
  display: block;
  background: var(--paper-100);
  color: var(--ink-900);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq a {
  color: var(--abyss-600);
}

.page-faq a:hover {
  color: var(--copper-500);
}

/* ---------- 首屏 ---------- */

.faq-mast {
  padding: clamp(24px, 4vw, 44px) 0 var(--sp-5);
  border-bottom: 1px solid var(--rule);
  background:
    linear-gradient(180deg, rgba(184, 115, 51, 0.07) 0%, rgba(244, 241, 234, 0) 62%);
}

.faq-mast .breadcrumbs {
  margin-bottom: var(--sp-3);
}

.faq-mast__grid {
  display: grid;
  gap: var(--sp-4);
}

.faq-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--copper-500);
  margin: 0 0 var(--sp-2);
}

.page-faq h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(27px, 5.4vw, 48px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 var(--sp-3);
  max-width: 20ch;
}

.faq-mast__lede {
  font-size: clamp(15px, 2.1vw, 17px);
  line-height: 1.85;
  color: var(--ink-70);
  margin: 0;
  max-width: 60ch;
}

.faq-mast__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.faq-quick {
  background: var(--abyss-800);
  color: var(--paper-100);
  padding: var(--sp-4) var(--sp-3) var(--sp-3);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.faq-quick__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--copper-300);
  margin: 0 0 6px;
}

.faq-quick__hours {
  font-size: 19px;
  margin: 0 0 var(--sp-3);
  color: var(--paper-100);
}

.faq-quick__list {
  list-style: none;
  margin: 0 0 var(--sp-3);
  padding: 0;
}

.faq-quick__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-top: 1px solid var(--rule-dark);
}

.faq-quick__k {
  font-size: 13px;
  color: var(--paper-50);
}

.faq-quick__v {
  font-size: 13px;
  color: var(--paper-100);
  word-break: break-all;
}

.faq-quick__note {
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--paper-50);
  margin: 0;
  padding-top: var(--sp-2);
  border-top: 1px solid var(--rule-dark);
}

/* ---------- 主体骨架 ---------- */

.faq-shell {
  padding-top: var(--sp-5);
  padding-bottom: var(--sp-6);
}

.faq-shell__grid {
  display: grid;
  gap: var(--sp-4);
  min-width: 0;
}

.faq-index {
  min-width: 0;
}

.faq-index__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-50);
  margin: 0 0 var(--sp-2);
}

.faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: var(--sp-1);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.faq-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--ink-70);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.faq-index__num {
  font-size: 11px;
  color: var(--copper-500);
}

.faq-index__link:hover {
  color: var(--abyss-900);
}

.faq-index__link[aria-current="true"] {
  color: var(--abyss-900);
  border-bottom-color: var(--copper-500);
  font-weight: 600;
}

.faq-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */

.faq-chapter + .faq-chapter {
  margin-top: var(--sp-5);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--rule);
}

.faq-chapter__head {
  display: grid;
  gap: var(--sp-1);
  margin-bottom: var(--sp-4);
}

.faq-chapter__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(34px, 7vw, 60px);
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--copper-300);
  opacity: 0.62;
}

.faq-chapter__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3.4vw, 30px);
  line-height: 1.32;
  margin: 0 0 var(--sp-2);
  color: var(--abyss-900);
}

.faq-chapter__lede {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-70);
  margin: 0;
  max-width: 62ch;
}

.faq-chapter__lede a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.faq-chapter__body > * + * {
  margin-top: var(--sp-3);
}

/* ---------- 卡片 ---------- */

.faq-cards {
  display: grid;
  gap: var(--sp-2);
}

.faq-card {
  position: relative;
  background: var(--paper-200);
  padding: var(--sp-3);
  clip-path: polygon(0 0, calc(100% - var(--faq-cut)) 0, 100% var(--faq-cut), 100% 100%, 0 100%);
  transition: transform var(--dur) ease, background-color var(--dur) ease;
}

.faq-card:hover {
  transform: translateY(-2px);
  background: #efe8da;
}

.faq-card:focus-within {
  outline: 2px solid var(--copper-500);
  outline-offset: 2px;
}

.faq-card__flag {
  position: absolute;
  top: 0;
  left: 0;
  width: 38px;
  height: 3px;
  background: var(--copper-500);
  transition: width var(--dur) ease;
}

.faq-card:hover .faq-card__flag {
  width: 92px;
}

.faq-card__meta {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink-50);
  margin: 6px 0 var(--sp-1);
}

.faq-card__title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--abyss-900);
}

.faq-card__text {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-70);
  margin: 0;
}

/* ---------- 图片 ---------- */

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

.page-faq .figure__media {
  overflow: hidden;
}

.page-faq .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.faq-figure .figure__caption {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-50);
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--copper-300);
}

/* ---------- 响应时限 ---------- */

.faq-sla {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--rule-strong);
}

.faq-sla__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 12px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
  transition: background-color var(--dur) ease;
}

.faq-sla__row:hover {
  background: var(--paper-200);
}

.faq-sla__what {
  font-size: 15px;
  font-weight: 600;
  color: var(--abyss-900);
}

.faq-sla__when {
  font-size: 15px;
  font-weight: 700;
  color: var(--copper-500);
  text-align: right;
  white-space: nowrap;
}

.faq-sla__kind {
  grid-column: 1 / -1;
}

.faq-note {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-50);
  margin: 0;
}

/* ---------- 步骤 ---------- */

.faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-3);
  counter-reset: faqstep;
}

.faq-steps__item {
  position: relative;
  padding-left: 54px;
}

.faq-steps__item::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--paper-100);
  background: var(--abyss-700);
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
  transition: background-color var(--dur) ease;
}

.faq-steps__item::after {
  content: "";
  position: absolute;
  left: 18px;
  top: 46px;
  bottom: -18px;
  width: 1px;
  background: var(--rule-strong);
}

.faq-steps__item:last-child::after {
  display: none;
}

.faq-steps__item:hover::before {
  background: var(--copper-500);
}

.faq-steps__item:focus-within::before {
  outline: 2px solid var(--copper-500);
  outline-offset: 2px;
}

.faq-steps__title {
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  margin: 4px 0 6px;
  color: var(--abyss-900);
}

.faq-steps__text {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-70);
  margin: 0;
  max-width: 58ch;
}

/* ---------- 编号结构图 ---------- */

.faq-codemap {
  background: var(--paper-200);
  padding: var(--sp-3) var(--sp-3) var(--sp-2);
  border-left: 3px solid var(--copper-500);
}

.faq-codemap__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink-50);
  margin: 0 0 var(--sp-2);
}

.faq-codemap__svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 邮件格式 ---------- */

.faq-mailfmt {
  background: var(--abyss-900);
  padding: var(--sp-3);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.faq-mailfmt__row {
  display: grid;
  gap: 5px;
  padding: 11px 0;
  margin: 0;
  border-bottom: 1px dashed var(--rule-dark);
}

.faq-mailfmt__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.faq-mailfmt__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--copper-300);
}

.faq-mailfmt__val {
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--paper-100);
  word-break: break-word;
}

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

.faq-checklist li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-70);
}

.faq-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 2px;
  background: var(--copper-500);
}

.faq-inline-link {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-70);
  margin: 0;
}

/* ---------- 常见问题 ---------- */

.faq-group + .faq-group {
  margin-top: var(--sp-4);
  padding-top: var(--sp-3);
  border-top: 1px solid var(--rule);
}

.faq-group__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--abyss-700);
  margin: 0 0 var(--sp-2);
}

.faq-qa {
  border-bottom: 1px solid var(--rule);
}

.faq-qa__q {
  list-style: none;
  cursor: pointer;
  position: relative;
  padding: 14px 38px 14px 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--abyss-900);
  transition: color var(--dur) ease;
}

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

.faq-qa__q::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--copper-500);
}

.faq-qa[open] .faq-qa__q::after {
  content: "–";
}

.faq-qa__q:hover {
  color: var(--copper-500);
}

.faq-qa__q:focus-visible {
  outline: 2px solid var(--copper-500);
  outline-offset: 2px;
}

.faq-qa__a {
  padding: 0 0 16px;
}

.faq-qa__a p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-70);
  margin: 0;
  max-width: 66ch;
}

.faq-qa__a a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .faq-cards--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .faq-sla__row {
    grid-template-columns: minmax(0, 1.4fr) 130px 110px;
  }

  .faq-sla__kind {
    grid-column: auto;
    justify-self: end;
  }

  .faq-sla__when {
    text-align: right;
  }
}

@media (min-width: 860px) {
  .faq-mast__grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .faq-quick {
    padding: var(--sp-4);
  }

  .faq-cards--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .faq-chapter__head {
    grid-template-columns: 104px minmax(0, 1fr);
    column-gap: var(--sp-3);
    align-items: start;
  }

  .faq-chapter__num {
    padding-top: 2px;
  }
}

@media (min-width: 1040px) {
  .faq-shell__grid {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    column-gap: var(--sp-5);
    align-items: start;
  }

  .faq-index {
    position: sticky;
    top: var(--sticky-offset);
    align-self: start;
  }

  .faq-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }

  .faq-index__link {
    width: 100%;
    padding: 9px 10px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .faq-index__link[aria-current="true"] {
    border-left-color: var(--copper-500);
    border-bottom-color: transparent;
    background: var(--paper-200);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card,
  .page-faq .faq-card__flag,
  .page-faq .faq-steps__item::before {
    transition: none;
  }

  .page-faq .faq-card:hover {
    transform: none;
  }
}