/* ===== 帮助中心 · 页面专属样式 ===== */
.page-faq {
  --fq-ink-soft: rgba(11, 31, 26, 0.78);
  --fq-ink-faint: rgba(11, 31, 26, 0.52);
  --fq-card-line: rgba(11, 31, 26, 0.13);
  background: var(--ink);
}

.page-faq [id] {
  scroll-margin-top: 96px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 44px) 0 clamp(38px, 5.6vw, 76px);
  background:
    radial-gradient(120% 90% at 84% 6%, rgba(198, 242, 78, 0.16), transparent 58%),
    radial-gradient(90% 70% at 4% 98%, rgba(233, 180, 76, 0.10), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, #0d251f 100%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 92px 92px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 86%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 86%);
  pointer-events: none;
}

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

.page-faq .faq-hero .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__eyebrow {
  display: inline-block;
  margin: 0 0 16px;
  padding-left: 10px;
  border-left: 2px solid var(--lime);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-faq h1 {
  margin: 0 0 20px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 5.4vw, 74px);
  line-height: 1.04;
  letter-spacing: 0.01em;
  color: var(--bone);
}

.page-faq .faq-hero__lead {
  max-width: 64ch;
  margin: 0 0 clamp(22px, 3vw, 32px);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 分组标签 ---------- */
.page-faq .faq-tabs {
  background: var(--ink);
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}

.page-faq .faq-tabs__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-tab {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid var(--line-mid);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--bone);
  text-decoration: none;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-tab:hover,
.page-faq .faq-tab:focus-visible {
  border-color: var(--lime);
  background: rgba(198, 242, 78, 0.09);
  color: var(--lime);
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-steps {
  background: var(--charcoal);
  border-bottom: 1px solid var(--line);
  padding: clamp(36px, 5vw, 68px) 0;
}

.page-faq .faq-steps__head {
  margin-bottom: clamp(22px, 3vw, 36px);
}

.page-faq .faq-steps__head .eyebrow {
  display: block;
  margin-bottom: 10px;
  color: var(--lime);
}

.page-faq .faq-steps h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.05;
  letter-spacing: 0.01em;
  color: var(--bone);
}

.page-faq .faq-steps__intro {
  max-width: 58ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-steps__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.page-faq .step-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-top: 2px solid var(--lime);
  background: linear-gradient(180deg, rgba(38, 48, 44, 0.75), rgba(20, 23, 26, 0.92));
  box-shadow: var(--shadow-soft);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-faq .step-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-mid);
  border-top-color: var(--lime);
  box-shadow: var(--shadow-lift);
}

.page-faq .step-card__num {
  font-family: var(--font-mono);
  font-size: clamp(38px, 4.6vw, 56px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-faq .step-card__title {
  margin: 0;
  font-size: clamp(17px, 1.8vw, 20px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--bone);
}

.page-faq .step-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  background: var(--bone);
  color: var(--ink);
  padding: clamp(36px, 5vw, 76px) 0 clamp(40px, 5vw, 80px);
}

.page-faq .faq-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 3.4vw, 48px);
  align-items: start;
}

.page-faq .faq-col {
  display: flex;
  flex-direction: column;
  gap: clamp(28px, 3.4vw, 44px);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--fq-card-line);
}

.page-faq .faq-group__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--lime-deep);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(18px, 2vw, 23px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  white-space: nowrap;
  color: var(--fq-ink-faint);
}

/* ---------- 问答卡 ---------- */
.page-faq .qa-card {
  background: var(--paper);
  border: 1px solid var(--fq-card-line);
  border-left: 3px solid transparent;
  margin-bottom: 10px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.page-faq .qa-card:hover {
  border-color: rgba(11, 31, 26, 0.26);
  box-shadow: 0 10px 24px -20px rgba(11, 31, 26, 0.9);
}

.page-faq .qa-card[open] {
  border-left-color: var(--lime);
  box-shadow: 0 12px 28px -22px rgba(11, 31, 26, 0.85);
}

.page-faq .qa-card__q {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: clamp(14.5px, 1.55vw, 16px);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: 0.01em;
  color: var(--ink);
}

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

.page-faq .qa-card__q::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.45;
  color: var(--fq-ink-faint);
  transition: color 0.2s ease;
}

.page-faq .qa-card[open] .qa-card__q::after {
  content: "−";
  color: var(--lime-deep);
}

.page-faq .qa-card__a {
  padding: 0 18px 16px;
}

.page-faq .qa-card__a p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--fq-ink-soft);
}

.page-faq .qa-card__a a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--lime-deep);
  text-underline-offset: 3px;
}

.page-faq .qa-card__a a:hover,
.page-faq .qa-card__a a:focus-visible {
  color: var(--lime-deep);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 22px;
  border: 1px solid var(--fq-card-line);
  background: var(--paper);
  padding: 10px;
}

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

.page-faq .figure__caption {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fq-ink-faint);
}

/* ---------- 术语速查 ---------- */
.page-faq .faq-glossary {
  background: var(--charcoal);
  border-top: 1px solid var(--line);
  padding: clamp(36px, 5vw, 76px) 0;
}

.page-faq .faq-glossary .eyebrow {
  display: block;
  margin-bottom: 10px;
  color: var(--lime);
}

.page-faq .faq-glossary h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 3.6vw, 46px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  color: var(--bone);
}

.page-faq .faq-glossary__intro {
  max-width: 60ch;
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .glossary-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-faq .glossary-jump a {
  padding: 6px 12px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .glossary-jump a:hover,
.page-faq .glossary-jump a:focus-visible {
  color: var(--lime);
  border-color: var(--lime-deep);
}

.page-faq .glossary-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: rgba(20, 23, 26, 0.62);
}

.page-faq .glossary-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .glossary-table caption {
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
  border-bottom: 1px solid var(--line);
}

.page-faq .glossary-table th {
  padding: 10px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  white-space: nowrap;
  color: var(--mist);
  border-bottom: 1px solid var(--line-mid);
}

.page-faq .glossary-table td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  vertical-align: top;
  color: var(--bone);
}

.page-faq .glossary-table tbody tr:nth-child(even) {
  background: rgba(38, 48, 44, 0.5);
}

.page-faq .glossary-table td:first-child {
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.05em;
  white-space: nowrap;
  color: var(--lime);
}

.page-faq .glossary-table tbody:last-child tr:last-child td {
  border-bottom: none;
}

/* ---------- 显现动效 ---------- */
.js-ready .page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}

.js-ready .page-faq [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-steps__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-faq .faq-columns {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr);
    gap: clamp(32px, 4vw, 64px);
  }
}

@media (max-width: 560px) {
  .page-faq h1 {
    max-width: none;
  }

  .page-faq .faq-group__count {
    display: none;
  }

  .page-faq .qa-card__a {
    padding: 0 14px 14px;
  }

  .page-faq .faq-figure {
    padding: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    animation: none !important;
    transition: none !important;
  }

  .js-ready .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
  }
}