/* ================= 使用指南 / page-faq ================= */

.page-faq {
  display: block;
  background:
    radial-gradient(120% 70% at 92% -6%, rgba(18, 214, 184, .12), transparent 62%),
    radial-gradient(90% 60% at 4% 12%, rgba(47, 191, 107, .08), transparent 58%),
    var(--ink);
  color: var(--text);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .guide-hero {
  position: relative;
  padding: clamp(22px, 4.6vw, 58px) 0 clamp(26px, 4vw, 52px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  isolation: isolate;
}

.page-faq .guide-hero::before {
  content: "";
  position: absolute;
  right: -8%;
  top: -46%;
  width: min(48vw, 580px);
  height: 165%;
  background: linear-gradient(180deg, rgba(18, 214, 184, .18), rgba(47, 191, 107, .07) 52%, transparent);
  transform: rotate(15deg);
  pointer-events: none;
  z-index: -1;
}

.page-faq .guide-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: clamp(90px, 16vw, 220px);
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  pointer-events: none;
}

.page-faq .guide-hero__body {
  position: relative;
  max-width: 1000px;
  margin-top: clamp(14px, 2.6vw, 26px);
}

.page-faq .guide-title {
  margin: .06em 0 .04em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(58px, 13vw, 128px);
  line-height: .92;
  letter-spacing: .04em;
  color: var(--text);
}

.page-faq .guide-sub {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: clamp(12px, 1.5vw, 15px);
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-faq .guide-lede {
  max-width: 44em;
  margin: 0 0 clamp(24px, 3.4vw, 38px);
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.85;
  color: var(--text);
  opacity: .88;
}

/* ---------- 快速跳转 ---------- */
.page-faq .quick-links {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .quick-links::-webkit-scrollbar {
  display: none;
}

.page-faq .quick-links a {
  flex: 0 0 auto;
  padding: 9px 15px;
  border: 1px solid var(--line-2);
  background: rgba(10, 31, 26, .62);
  color: var(--text);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  white-space: nowrap;
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .quick-links a:hover,
.page-faq .quick-links a:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}

/* ---------- 章节 ---------- */
.page-faq .guide-section {
  padding: clamp(40px, 6vw, 82px) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 18px);
}

.page-faq .guide-section .section-head {
  max-width: 760px;
}

/* ---------- 问答手风琴 ---------- */
.page-faq .qa-list {
  display: flex;
  flex-direction: column;
  margin-top: clamp(20px, 3vw, 34px);
  border-top: 1px solid var(--line);
}

.page-faq .qa {
  border-bottom: 1px solid var(--line);
  background: transparent;
  transition: background .3s var(--ease);
}

.page-faq .qa[open] {
  background: linear-gradient(90deg, rgba(18, 214, 184, .10), transparent 64%);
}

.page-faq .qa > summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 2vw, 20px);
  padding: clamp(16px, 2.2vw, 23px) clamp(12px, 2vw, 20px) clamp(16px, 2.2vw, 23px) clamp(15px, 2.4vw, 26px);
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(17px, 2.1vw, 23px);
  line-height: 1.36;
  letter-spacing: .02em;
  color: var(--text);
  transition: color .25s var(--ease);
}

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

.page-faq .qa > summary::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--line-2);
  transition: background .3s var(--ease);
}

.page-faq .qa > summary:hover {
  color: var(--grass-soft);
}

.page-faq .qa[open] > summary::before {
  background: var(--lemon);
}

.page-faq .qa-idx {
  flex: 0 0 auto;
  padding-top: .42em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
  transition: color .25s var(--ease);
}

.page-faq .qa[open] .qa-idx {
  color: var(--cyan);
}

.page-faq .qa-q {
  flex: 1 1 auto;
}

.page-faq .qa-mark {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: .4em;
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: opacity .25s var(--ease), background .25s var(--ease);
}

.page-faq .qa-mark::before {
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  transform: translateX(-50%);
}

.page-faq .qa-mark::after {
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .qa[open] .qa-mark::before {
  opacity: 0;
}

.page-faq .qa[open] .qa-mark::after {
  background: var(--lemon);
}

.page-faq .qa-body {
  max-width: 64ch;
  padding: 0 clamp(12px, 2vw, 20px) clamp(20px, 2.6vw, 28px) clamp(15px, 2.4vw, 26px);
}

.page-faq .qa-body p {
  margin: 0 0 .85em;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: var(--text);
  opacity: .86;
}

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

.page-faq .qa-body strong {
  font-weight: 600;
  color: var(--grass-soft);
}

.page-faq .qa-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-2);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .qa-body a:hover,
.page-faq .qa-body a:focus-visible {
  color: var(--lemon);
  border-color: var(--lemon);
}

/* ---------- 三步上手 ---------- */
.page-faq .steps {
  list-style: none;
  margin: clamp(24px, 3.4vw, 40px) 0 0;
  padding: 0;
}

.page-faq .step {
  position: relative;
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: clamp(12px, 2vw, 22px);
  padding-bottom: clamp(26px, 3.2vw, 38px);
}

.page-faq .step:last-child {
  padding-bottom: 0;
}

.page-faq .step::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 38px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(18, 214, 184, 0));
}

.page-faq .step:last-child::before {
  display: none;
}

.page-faq .step-num {
  position: relative;
  z-index: 1;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--ink-3);
  border: 1px solid var(--line-2);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--lemon);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
}

.page-faq .step-title {
  margin: 0 0 .42em;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.3;
  letter-spacing: .03em;
  color: var(--text);
}

.page-faq .step p {
  max-width: 60ch;
  margin: 0;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  opacity: .86;
}

.page-faq .step p a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-2);
}

.page-faq .step p a:hover,
.page-faq .step p a:focus-visible {
  color: var(--lemon);
  border-color: var(--lemon);
}

/* ---------- 提示带 ---------- */
.page-faq .cue-band {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: clamp(10px, 1.6vw, 18px);
  margin: clamp(30px, 4vw, 52px) 0 0;
  padding: clamp(20px, 3vw, 30px) clamp(20px, 3.6vw, 42px);
  background: linear-gradient(96deg, var(--amber), #F3A75F);
  color: #1B0C02;
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-faq .cue-band--cool {
  background: linear-gradient(96deg, var(--grass), #58D68D);
  color: #04150E;
}

.page-faq .cue-band__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  opacity: .7;
}

.page-faq .cue-band__text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.9vw, 30px);
  line-height: 1.22;
  letter-spacing: .02em;
}

.page-faq .cue-band__note {
  flex: 1 1 100%;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  opacity: .82;
}

/* ---------- 图片 ---------- */
.page-faq .guide-figure {
  max-width: 620px;
  margin: clamp(30px, 4vw, 52px) 0 0;
}

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

.page-faq .guide-figure--band {
  max-width: none;
  margin: 0 0 clamp(26px, 3.6vw, 40px);
}

/* ---------- 账号分档 ---------- */
.page-faq .tiers {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 36px);
}

.page-faq .tier {
  position: relative;
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--panel);
  border-top: 2px solid var(--line-2);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-faq .tier--pro {
  border-top-color: var(--cyan);
}

.page-faq .tier--venue {
  border-top-color: var(--amber);
}

.page-faq .tier-name {
  margin: 0 0 .3em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: .04em;
  color: var(--text);
}

.page-faq .tier-fit {
  margin: 0 0 1.1em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .tier-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .tier-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.72;
  opacity: .88;
}

.page-faq .tier-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .74em;
  width: 9px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .tier--venue .tier-list li::before {
  background: var(--amber);
}

/* ---------- 结尾行动区 ---------- */
.page-faq .guide-cta {
  padding: clamp(40px, 6vw, 80px) 0 clamp(24px, 3.4vw, 48px);
}

.page-faq .guide-cta__inner {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  align-items: end;
  padding: clamp(24px, 4vw, 46px);
  background: linear-gradient(120deg, rgba(18, 214, 184, .15), rgba(10, 31, 26, .92) 58%);
  border-left: 3px solid var(--cyan);
  clip-path: polygon(0 0, calc(100% - 32px) 0, 100% 32px, 100% 100%, 0 100%);
}

.page-faq .guide-cta__title {
  margin: .1em 0 .5em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.8vw, 42px);
  line-height: 1.1;
  letter-spacing: .03em;
  color: var(--text);
}

.page-faq .guide-cta__note {
  max-width: 42em;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  opacity: .82;
}

.page-faq .guide-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .guide-cta__actions .btn {
  text-decoration: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .tiers {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-faq .guide-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-faq .cue-band__note {
    flex: 0 1 auto;
  }
}

@media (min-width: 1024px) {
  .page-faq .qa > summary {
    padding-right: clamp(20px, 3vw, 34px);
  }

  .page-faq .guide-figure {
    margin-left: clamp(0px, 4vw, 72px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa-mark::before,
  .page-faq .qa-mark::after,
  .page-faq .quick-links a,
  .page-faq .qa > summary {
    transition: none;
  }
}