/* ============================================================
   支持中心  /support/  —— 页面专属样式（作用域 .page-faq）
   ============================================================ */

.page-faq {
  display: block;
  color: var(--fog);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-top: clamp(1.25rem, 3vw, 2rem);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(1.75rem, 4.5vw, 3rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.6rem);
  max-width: 62rem;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(2rem, 5.6vw, 3.85rem);
  line-height: 1.06;
  letter-spacing: -0.022em;
  color: var(--fog);
  max-width: 17ch;
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: var(--measure);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.75rem;
  margin: 0.25rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick a {
  display: inline-block;
  padding: 0.48rem 0.95rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--cyan);
  font-size: 0.875rem;
  line-height: 1.4;
  text-decoration: none;
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-faq .faq-quick a:hover {
  border-color: var(--cyan);
  background: rgba(76, 224, 210, 0.1);
}

.page-faq .faq-quick a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 区块骨架 ---------- */
.page-faq .faq-block {
  padding: clamp(2.25rem, 5.5vw, 3.75rem) 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-block__head {
  display: grid;
  gap: 0.8rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.page-faq .faq-heading {
  margin: 0;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(1.45rem, 3.1vw, 2.3rem);
  line-height: 1.16;
  letter-spacing: -0.012em;
  color: var(--fog);
  max-width: 26ch;
}

.page-faq .faq-sub {
  margin: 0;
  max-width: var(--measure);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 01 步骤 ---------- */
.page-faq .faq-steps__media {
  margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
}

.page-faq .faq-step-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-step-tab {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 0.85rem;
  width: 100%;
  padding: 1rem 0.75rem 1rem 0.25rem;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: none;
  color: var(--slate);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
  transition: color 0.28s var(--ease), background-color 0.28s var(--ease);
}

.page-faq .faq-step-tab:hover {
  color: var(--fog);
}

.page-faq .faq-step-tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-step-tab[aria-selected="true"] {
  color: var(--fog);
  background: linear-gradient(90deg, rgba(76, 224, 210, 0.14), transparent 78%);
}

.page-faq .faq-step-tab__num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--slate);
  transition: color 0.28s var(--ease);
}

.page-faq .faq-step-tab[aria-selected="true"] .faq-step-tab__num {
  color: var(--cyan);
}

.page-faq .faq-step-panel {
  padding: clamp(1.25rem, 3vw, 1.9rem) 0.25rem;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-step-panel:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-step-panel__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(1.05rem, 1.9vw, 1.35rem);
  line-height: 1.35;
  color: var(--fog);
}

.page-faq .faq-step-panel__text {
  margin: 0;
  max-width: var(--measure);
  font-size: 0.97rem;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 02 服务范围 ---------- */
.page-faq .faq-scope__media {
  margin: 0 0 clamp(1.25rem, 2.5vw, 1.75rem);
}

.page-faq .faq-scope__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-faq .faq-card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-radius: var(--r-lg);
  padding: clamp(1.2rem, 2.4vw, 1.75rem);
}

.page-faq .faq-card__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(1rem, 1.7vw, 1.22rem);
  line-height: 1.32;
  letter-spacing: -0.01em;
}

.page-faq .faq-card__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.82;
}

.page-faq .faq-card__stat {
  display: block;
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #0b7f74;
}

.page-faq .faq-card--fog {
  background: var(--fog);
  color: var(--deep);
}

.page-faq .faq-card--sand {
  background: var(--sand);
  color: var(--deep);
}

.page-faq .faq-card--panel {
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--fog);
}

.page-faq .faq-card--panel .faq-card__text {
  color: var(--slate);
}

.page-faq .faq-card--panel::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle at 84% 8%, rgba(76, 224, 210, 0.2), transparent 62%);
  pointer-events: none;
}

/* ---------- 03 常见问题 ---------- */
.page-faq .faq-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 clamp(1rem, 2vw, 1.5rem);
  padding: 0;
  border: 0;
}

.page-faq .faq-chip {
  padding: 0.44rem 0.95rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--slate);
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.4;
  cursor: pointer;
  transition: color 0.26s var(--ease), background-color 0.26s var(--ease), border-color 0.26s var(--ease);
}

.page-faq .faq-chip:hover {
  color: var(--fog);
  border-color: var(--cyan);
}

.page-faq .faq-chip:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-chip[aria-pressed="true"] {
  background: var(--cyan-soft);
  border-color: var(--cyan-soft);
  color: var(--deep);
  font-weight: 600;
}

.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.1rem 1rem 1.1rem 1.1rem;
  border: 0;
  border-left: 2px solid var(--line-strong);
  background: none;
  color: var(--fog);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(0.97rem, 1.5vw, 1.08rem);
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.28s var(--ease), color 0.28s var(--ease);
}

.page-faq .faq-trigger:hover {
  border-left-color: var(--cyan);
}

.page-faq .faq-trigger:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-trigger[aria-expanded="true"] {
  border-left-color: var(--cyan);
}

.page-faq .faq-trigger::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--slate);
  transition: color 0.28s var(--ease);
}

.page-faq .faq-trigger[aria-expanded="true"]::after {
  content: "\2013";
  color: var(--cyan);
}

.page-faq .faq-panel {
  padding: 0 1rem 1.25rem 1.1rem;
}

.page-faq .faq-panel p {
  margin: 0;
  max-width: var(--measure);
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 04 支持渠道 ---------- */
.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2.25rem);
}

.page-faq .faq-help__grid .faq-block__head {
  margin-bottom: 0;
}

.page-faq .faq-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-channel {
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
}

.page-faq .faq-channel__label {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .faq-channel__value {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--fog);
  overflow-wrap: anywhere;
}

.page-faq .faq-channel__note {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 05 收尾 ---------- */
.page-faq .faq-next {
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

.page-faq .faq-next__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-content: start;
}

/* ---------- 平板起 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-step-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 1.75rem;
  }

  .page-faq .faq-step-tab {
    padding: 1.1rem 0.25rem 1.1rem 0;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 880px) {
  .page-faq .faq-scope__grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-faq .faq-card--a { grid-column: span 4; }
  .page-faq .faq-card--b { grid-column: span 2; }
  .page-faq .faq-card--c { grid-column: span 2; }
  .page-faq .faq-card--d { grid-column: span 2; }
  .page-faq .faq-card--e { grid-column: span 2; }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-faq .faq-next__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-faq .faq-next__actions {
    justify-content: flex-end;
  }

  .page-faq .faq-trigger {
    padding-right: 1.5rem;
  }
}