/* ===== 支持中心 /support/ .page-faq 专属样式 ===== */
.page-faq {
  --faq-max: 1180px;
  --faq-gap: clamp(64px, 9vw, 120px);
  position: relative;
  overflow: hidden;
  background: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.75;
}

.page-faq::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 85% 55% at 85% 0%, rgba(0, 255, 163, .08), transparent 60%),
    radial-gradient(ellipse 70% 55% at 0% 100%, rgba(255, 179, 0, .05), transparent 55%),
    linear-gradient(rgba(42, 59, 92, .22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 59, 92, .22) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 56px 56px, 56px 56px;
}

.faq-wrap {
  position: relative;
  z-index: 1;
  max-width: var(--faq-max);
  margin-inline: auto;
  padding: clamp(24px, 5vw, 64px) clamp(20px, 5vw, 64px) 96px;
}

.faq-wrap .breadcrumb {
  margin-bottom: clamp(28px, 4vw, 48px);
}

/* 首屏：主题声明 + 内容目录 */
.faq-intro {
  display: grid;
  gap: 40px;
  margin-bottom: var(--faq-gap);
}

.faq-intro-copy {
  max-width: 720px;
}

.page-faq .section-label {
  color: var(--accent);
  font-family: var(--font-data);
  letter-spacing: .14em;
  text-transform: uppercase;
  font-size: .8125rem;
  border: 1px solid rgba(0, 255, 163, .25);
  padding: 6px 12px;
  background: rgba(0, 255, 163, .05);
}

.faq-intro h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-style: oblique;
  font-size: clamp(2.1rem, 5.5vw, 3.75rem);
  line-height: 1.12;
  margin: 18px 0 16px;
  letter-spacing: -.01em;
  text-wrap: balance;
}

.faq-lead {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 60ch;
  margin-bottom: 28px;
}

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

.faq-index-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  background: rgba(16, 32, 63, .5);
  color: var(--text-main);
  font-size: .875rem;
  letter-spacing: .02em;
  text-decoration: none;
  transition: border-color .25s var(--ease-out), transform .25s var(--ease-out), background .25s;
}

.faq-index-link span {
  color: var(--accent);
  font-family: var(--font-data);
  font-weight: 700;
  font-size: .8125rem;
}

.faq-index-link:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  background: rgba(0, 255, 163, .06);
}

/* SVG 路线图 */
.faq-intro-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  background:
    linear-gradient(140deg, rgba(16, 32, 63, .72), rgba(10, 17, 40, .5)),
    repeating-linear-gradient(45deg, rgba(42, 59, 92, .32) 0 1px, transparent 1px 14px);
  padding: 24px 16px;
  position: relative;
  overflow: hidden;
}

.faq-intro-visual::after {
  content: "SUPPORT ROUTE";
  position: absolute;
  top: 12px;
  right: 14px;
  font-family: var(--font-data);
  font-size: .625rem;
  letter-spacing: .18em;
  color: rgba(138, 148, 179, .5);
}

.route-map {
  width: 100%;
  max-width: 520px;
  height: auto;
  display: block;
}

.rm-line {
  fill: none;
  stroke-width: 2;
  stroke-dasharray: 5 6;
}

.rm-halo,
.rm-halo-amber {
  fill: rgba(0, 255, 163, .14);
}

.rm-dot {
  fill: var(--accent);
}

.rm-dot-amber {
  fill: var(--amber);
}

.rm-halo-amber {
  fill: rgba(255, 179, 0, .14);
}

.rm-node:hover .rm-halo,
.rm-node:hover .rm-halo-amber {
  fill: rgba(0, 255, 163, .28);
}

.rm-node:hover .rm-halo-amber {
  fill: rgba(255, 179, 0, .28);
}

.rm-label {
  font-family: var(--font-data);
  font-size: 12px;
  fill: var(--text-muted);
  font-weight: 600;
}

/* 章节骨架 */
.faq-chapter {
  margin-bottom: var(--faq-gap);
  scroll-margin-top: 96px;
}

.ch-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: clamp(28px, 4vw, 44px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.ch-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 72px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.ch-num {
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--accent);
  background: rgba(0, 255, 163, .07);
  border: 1px solid rgba(0, 255, 163, .2);
  padding: 4px 10px;
  font-size: .8125rem;
  letter-spacing: .08em;
}

.faq-chapter h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-style: oblique;
  font-size: clamp(1.35rem, 3vw, 2rem);
  line-height: 1.25;
  margin: 0;
  letter-spacing: .01em;
}

/* F-01 快速入门 */
.start-grid {
  display: grid;
  gap: 20px;
}

.start-card {
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
}

.start-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent 65%);
  opacity: .8;
}

.start-step {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 2rem;
  letter-spacing: .04em;
  color: rgba(0, 255, 163, .35);
  -webkit-text-stroke: 1px var(--accent);
  -webkit-text-fill-color: transparent;
  display: block;
  margin-bottom: 14px;
}

.start-card h3 {
  font-family: var(--font-head);
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text-main);
}

.start-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: .9375rem;
  line-height: 1.75;
}

/* 图文分栏：手风琴 + 媒体 */
.faq-split {
  display: grid;
  gap: 40px;
}

.faq-split--single {
  grid-template-columns: 1fr;
}

.faq-list {
  display: grid;
}

.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
  transition: background .25s;
}

.faq-item:first-child {
  border-top: 1px solid var(--line);
}

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  padding: 6px 0;
}

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

.faq-q {
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-main);
}

.faq-toggle {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  color: var(--accent);
  font-size: 1.125rem;
  font-weight: 400;
  line-height: 1;
  transition: transform .25s var(--ease-out), border-color .25s var(--ease-out), background .25s;
}

.faq-toggle::before {
  content: "+";
  font-family: var(--font-head);
}

.faq-item:hover .faq-toggle,
.faq-item[open] .faq-toggle {
  border-color: var(--accent);
  background: rgba(0, 255, 163, .08);
}

.faq-item[open] .faq-toggle {
  transform: rotate(45deg);
}

.faq-a {
  margin-top: 10px;
  max-width: 68ch;
  padding-left: 20px;
  border-left: 2px solid rgba(0, 255, 163, .22);
}

.faq-a p {
  margin: 0;
  color: var(--text-muted);
  font-size: .9375rem;
}

.faq-a p + p {
  margin-top: 10px;
}

.faq-a a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 163, .3);
}

.faq-a a:hover {
  border-bottom-color: var(--accent);
}

.faq-item[open] .faq-a {
  animation: faqFadeIn .3s var(--ease-out);
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 荧光绿提示点 */
.faq-tip {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 12px;
  padding: 10px 14px;
  background: rgba(0, 255, 163, .05);
  border: 1px solid rgba(0, 255, 163, .14);
  color: var(--text-main);
  font-size: .84375rem;
  line-height: 1.7;
}

.tip-dot {
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 9px;
  box-shadow: 0 0 8px rgba(0, 255, 163, .5);
}

/* 关键词高亮 */
.hl {
  background: linear-gradient(120deg, rgba(0, 255, 163, .2), rgba(0, 255, 163, .04));
  color: var(--accent);
  padding: 0 5px;
  border-radius: 2px;
  font-weight: 600;
  white-space: nowrap;
}

/* 媒体图 */
.faq-media {
  margin: 0;
}

.faq-media-frame {
  position: relative;
  border: 1px solid var(--line);
  background: var(--bg-surface);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

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

.faq-media-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--amber));
  opacity: .75;
}

.faq-media figcaption {
  font-family: var(--font-data);
  font-size: .8125rem;
  color: var(--text-muted);
  margin-top: 12px;
  letter-spacing: .03em;
  line-height: 1.6;
  padding-left: 12px;
  border-left: 2px solid rgba(0, 255, 163, .35);
}

/* F-05 其他支持 */
.contact-grid {
  display: grid;
  gap: 18px;
}

.contact-card {
  padding: 24px 22px;
}

.contact-kicker {
  display: block;
  font-family: var(--font-data);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.contact-value {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-main);
  word-break: break-all;
  line-height: 1.45;
}

.contact-value a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 255, 163, .3);
  transition: border-color .25s;
}

.contact-value a:hover {
  border-color: var(--accent);
}

.contact-card p {
  margin: 8px 0 0;
  color: var(--text-muted);
  font-size: .875rem;
  line-height: 1.65;
}

.faq-trust {
  margin-top: 28px;
  padding: 18px 22px;
  border: 1px dashed var(--line);
  color: var(--text-muted);
  font-size: .875rem;
  letter-spacing: .04em;
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(16, 32, 63, .35);
}

.faq-trust::before {
  content: "●";
  color: var(--accent);
  font-size: .625rem;
}

/* 响应式：平板 */
@media (min-width: 640px) {
  .start-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .start-card:last-child {
    grid-column: span 2;
  }

  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 响应式：桌面 */
@media (min-width: 960px) {
  .faq-intro {
    grid-template-columns: 1.15fr .85fr;
    align-items: center;
    gap: 56px;
  }

  .start-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .start-card:last-child {
    grid-column: auto;
  }

  .contact-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 380px);
    gap: clamp(48px, 7vw, 84px);
    align-items: start;
  }

  .faq-split--flip {
    grid-template-columns: minmax(280px, 380px) minmax(0, 1fr);
  }

  .faq-split--flip .faq-media {
    grid-column: 1;
    grid-row: 1;
  }

  .faq-split--flip .faq-list {
    grid-column: 2;
    grid-row: 1;
  }

  .faq-split--single {
    grid-template-columns: 1fr;
  }

  .faq-split--single .faq-list {
    max-width: 780px;
  }
}