/* ===== 帮助中心 · 页面专属样式（作用域 .page-faq） ===== */

.page-faq {
  --faq-panel: rgba(23, 42, 74, 0.62);
  --faq-panel-deep: rgba(5, 10, 24, 0.74);
  --faq-line: rgba(215, 227, 244, 0.11);
  --faq-cyan-line: rgba(45, 226, 230, 0.28);
  position: relative;
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

.page-faq [id] {
  scroll-margin-top: 7.5rem;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 5vw, 3rem) 0 clamp(2rem, 4.5vw, 3.25rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -32% -22% auto -22%;
  height: 540px;
  background:
    radial-gradient(58% 76% at 16% 0%, rgba(45, 226, 230, 0.16), transparent 68%),
    radial-gradient(46% 64% at 88% 14%, rgba(255, 107, 53, 0.13), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(1.85rem, 6vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: 0.015em;
  color: var(--white);
  margin: 0 0 1rem;
  max-width: 17ch;
}

.page-faq .faq-hero .lead {
  max-width: 54ch;
  margin: 0;
  color: var(--steel);
  font-size: clamp(0.95rem, 2.2vw, 1.06rem);
  line-height: 1.8;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

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

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

.page-faq .faq-hero-tags {
  align-self: stretch;
  padding: 1.25rem 1.2rem 1.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--orange);
  background: linear-gradient(152deg, var(--faq-panel), var(--faq-panel-deep));
}

.page-faq .faq-tags-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 0.9rem;
}

.page-faq .faq-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .faq-tags-note {
  margin: 1rem 0 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--steel);
  opacity: 0.78;
}

@media (min-width: 880px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: stretch;
    gap: 2rem;
  }
}

/* ---------- 主体两栏布局 ---------- */

.page-faq .faq-layout {
  display: grid;
  gap: 1.75rem;
  align-items: start;
  position: relative;
}

@media (min-width: 1020px) {
  .page-faq .faq-layout {
    grid-template-columns: 226px minmax(0, 1fr);
    gap: 3.25rem;
  }
}

/* ---------- 左侧章节目录 ---------- */

.page-faq .faq-toc {
  border-radius: var(--radius-lg);
  border: 1px solid var(--faq-line);
  background: linear-gradient(166deg, rgba(16, 30, 56, 0.86), rgba(5, 10, 24, 0.6));
  padding: 1.05rem 1rem 1.15rem;
}

@media (min-width: 1020px) {
  .page-faq .faq-toc {
    position: sticky;
    top: 7rem;
  }
}

.page-faq .faq-toc-title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 0.8rem;
  padding-left: 0.55rem;
}

.page-faq .faq-toc-list {
  list-style: none;
  counter-reset: faq-toc;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.12rem;
}

.page-faq .faq-toc-list li {
  counter-increment: faq-toc;
}

.page-faq .faq-toc-list a {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.5rem 0.55rem;
  border-radius: var(--radius-sm);
  color: var(--steel);
  text-decoration: none;
  font-size: 0.88rem;
  line-height: 1.45;
  border-left: 2px solid transparent;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-toc-list a::before {
  content: counter(faq-toc, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--orange);
  flex: none;
}

.page-faq .faq-toc-list a:hover,
.page-faq .faq-toc-list a:focus-visible {
  background: rgba(45, 226, 230, 0.09);
  border-left-color: var(--cyan);
  color: var(--white);
}

/* ---------- 章节标题 ---------- */

.page-faq .faq-block + .faq-block {
  margin-top: clamp(2.5rem, 6vw, 4rem);
}

.page-faq .faq-block-head {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
}

.page-faq .faq-block-no {
  flex: none;
  font-family: var(--font-head);
  font-size: clamp(1.9rem, 5.5vw, 2.7rem);
  line-height: 0.88;
  color: rgba(255, 107, 53, 0.9);
  padding-top: 0.2rem;
  letter-spacing: 0.02em;
}

.page-faq .faq-block-title {
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 3.6vw, 1.8rem);
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: var(--white);
  margin: 0 0 0.45rem;
}

.page-faq .faq-block-sub {
  margin: 0;
  max-width: 56ch;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--steel);
  opacity: 0.82;
}

/* ---------- 三步排查 ---------- */

.page-faq .steps {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.6rem;
}

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

.page-faq .step {
  position: relative;
  overflow: hidden;
  padding: 1.45rem 1.2rem 1.35rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--faq-line);
  background: linear-gradient(158deg, rgba(23, 42, 74, 0.82), rgba(5, 10, 24, 0.56));
  transition: border-color 0.22s ease, transform 0.22s ease;
}

.page-faq .step::after {
  content: "";
  position: absolute;
  right: -34%;
  bottom: -62%;
  width: 168px;
  height: 168px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(45, 226, 230, 0.16), transparent 70%);
  pointer-events: none;
}

.page-faq .step:hover {
  border-color: var(--faq-cyan-line);
  transform: translateY(-2px);
}

.page-faq .step-no {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 0.7rem;
}

.page-faq .step h3 {
  font-family: var(--font-head);
  font-size: 1.02rem;
  line-height: 1.35;
  color: var(--white);
  margin: 0 0 0.5rem;
}

.page-faq .step p {
  margin: 0;
  position: relative;
  z-index: 1;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 手风琴问答 ---------- */

.page-faq .faq-list {
  display: grid;
  gap: 0.65rem;
  margin-top: 1.6rem;
}

.page-faq .faq-item {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(23, 42, 74, 0.64), rgba(10, 20, 40, 0.5));
  overflow: hidden;
  transition: border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-faq .faq-item:hover {
  border-color: rgba(45, 226, 230, 0.18);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-cyan-line);
  box-shadow: var(--shadow-card);
}

.page-faq .faq-q {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: 1rem 1.15rem;
  font-family: var(--font-head);
  font-size: 0.96rem;
  line-height: 1.55;
  letter-spacing: 0.01em;
  color: var(--white);
  transition: color 0.2s ease;
}

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

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-item[open] .faq-q {
  color: var(--cyan-soft);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .faq-q::after {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  margin-left: auto;
  margin-top: 0.42rem;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.25s ease;
}

.page-faq .faq-item[open] .faq-q::after {
  transform: rotate(-135deg);
}

.page-faq .faq-no {
  flex: none;
  min-width: 1.7rem;
  padding-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.page-faq .faq-a {
  padding: 0 1.15rem 1.2rem 3.65rem;
  max-width: 64ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--steel);
}

@media (max-width: 560px) {
  .page-faq .faq-a {
    padding-left: 1.15rem;
  }
}

.page-faq .faq-a p {
  margin: 0 0 0.7rem;
}

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

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--cyan-soft);
}

/* ---------- 旧版入口配图 ---------- */

.page-faq .faq-figure {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
}

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

/* ---------- 联系支持 ---------- */

.page-faq .faq-contact {
  position: relative;
  overflow: hidden;
  margin-top: 1.6rem;
  padding: clamp(1.35rem, 4vw, 2rem);
  border-radius: var(--radius-xl);
  border: 1px solid var(--faq-cyan-line);
  background: linear-gradient(150deg, rgba(16, 30, 56, 0.92), rgba(5, 10, 24, 0.72));
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  top: -58%;
  right: -12%;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.17), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-contact > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-contact .contact-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
}

.page-faq .faq-contact .contact-list > li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.75rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px dashed var(--faq-line);
}

.page-faq .faq-contact .contact-list > li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-contact .contact-label {
  flex: none;
  min-width: 5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-contact .contact-value {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--white);
  word-break: break-all;
}

.page-faq .faq-contact-note {
  margin: 1.2rem 0 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: var(--steel);
  opacity: 0.86;
}

.page-faq .faq-contact-note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-contact-note a:hover,
.page-faq .faq-contact-note a:focus-visible {
  color: var(--cyan-soft);
}

/* ---------- 窄屏保护 ---------- */

@media (max-width: 480px) {
  .page-faq .faq-block-head {
    gap: 0.65rem;
  }

  .page-faq .faq-block-no {
    font-size: 1.7rem;
  }

  .page-faq .faq-q {
    font-size: 0.92rem;
    padding: 0.95rem 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step,
  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-q::after {
    transition: none;
  }

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