/* ===== 帮助中心页面专属样式 ===== */
.page-faq {
  --faq-border: rgba(192, 200, 208, 0.18);
  --faq-card-bg: #12224A;
  --faq-card-bg-2: rgba(18, 34, 74, 0.65);
  --faq-green-dim: rgba(0, 255, 163, 0.08);
  background: var(--c-deep);
  overflow-x: hidden;
}

/* ---- Hero 引导区 ---- */
.page-faq .faq-hero {
  position: relative;
  padding-top: clamp(2rem, 5vw, 3.5rem);
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--faq-border);
  background:
    radial-gradient(circle at 85% 20%, rgba(18, 34, 74, 0.75) 0%, transparent 55%),
    repeating-linear-gradient(0deg, transparent 0 23px, rgba(192, 200, 208, 0.05) 23px 24px),
    repeating-linear-gradient(90deg, transparent 0 23px, rgba(192, 200, 208, 0.05) 23px 24px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, transparent 50%, rgba(0, 255, 163, 0.08) 50%);
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-faq .faq-hero-copy h1 {
  margin: 1rem 0 0.75rem;
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 4vw, 3.1rem);
  font-weight: 900;
  line-height: 1.25;
  color: var(--c-white);
  letter-spacing: -0.01em;
}

.page-faq .faq-hero-copy p {
  margin: 0;
  max-width: 34rem;
  color: var(--c-silver);
  font-size: 0.95rem;
  line-height: 1.75;
}

.page-faq .faq-hero-art img {
  display: block;
  width: 100%;
  max-width: 500px;
  height: auto;
  border: 1px solid var(--faq-border);
  clip-path: var(--clip-cut);
  background: var(--c-ocean);
}

/* ---- 主体两列布局 ---- */
.page-faq .faq-layout {
  display: grid;
  gap: 2.5rem;
  padding-top: clamp(2rem, 4vw, 3.25rem);
  padding-bottom: 2.5rem;
}

.page-faq .faq-main {
  display: grid;
  gap: 3rem;
  align-content: start;
}

/* ---- 章节内部补充 ---- */
.page-faq .faq-section {
  min-width: 0;
}

/* ---- 手风琴 ---- */
.page-faq .faq-accordion {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-faq .faq-item {
  position: relative;
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-faq .faq-item[open] {
  border-color: rgba(0, 255, 163, 0.35);
  background: rgba(18, 34, 74, 0.9);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background 0.2s ease;
}

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

.page-faq .faq-item summary:hover {
  background: var(--faq-green-dim);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--c-green);
  outline-offset: -2px;
}

.page-faq .faq-q-num {
  font-family: var(--font-data);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--c-deep);
  background: var(--grad-silver);
  padding: 0.22rem 0.5rem;
  flex-shrink: 0;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 0 100%);
}

.page-faq .faq-q-text {
  flex: 1;
  font-family: var(--font-head);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.5;
}

.page-faq .faq-q-icon {
  position: relative;
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.page-faq .faq-q-icon::before,
.page-faq .faq-q-icon::after {
  content: "";
  position: absolute;
  background: var(--c-silver);
  transition: transform 0.25s ease, background 0.25s ease;
}

.page-faq .faq-q-icon::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .faq-q-icon::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-q-icon::after {
  transform: scaleY(0);
}

.page-faq .faq-item[open] .faq-q-icon::before {
  background: var(--c-green);
}

.page-faq .faq-a {
  padding: 1rem 1.1rem 1.25rem;
  border-top: 1px dashed var(--faq-border);
  color: var(--c-silver);
  font-size: 0.88rem;
  line-height: 1.75;
}

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

/* ---- 兼容性区域 ---- */
.page-faq .faq-compat {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-faq .faq-compat-main {
  background: var(--faq-card-bg-2);
  border: 1px solid var(--faq-border);
  padding: 1.25rem;
}

.page-faq .faq-compat-main h3 {
  margin: 0 0 1rem;
  font-family: var(--font-head);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: 0.04em;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--faq-border);
}

.page-faq .faq-browser-list,
.page-faq .faq-device-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-browser-list li,
.page-faq .faq-device-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0.7rem;
  background: rgba(10, 17, 40, 0.55);
  font-size: 0.85rem;
  color: var(--c-silver);
  border-left: 2px solid var(--c-ocean);
}

.page-faq .faq-browser-list .compat-browser {
  font-weight: 600;
  color: var(--c-white);
}

.page-faq .faq-browser-list .compat-ver {
  font-family: var(--font-data);
  font-size: 0.74rem;
  color: var(--c-green);
  white-space: nowrap;
}

.page-faq .faq-device-list li {
  border-left-color: var(--c-orange);
  justify-content: flex-start;
}

.page-faq .faq-compat-note {
  margin: 1rem 0 0;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--c-silver);
  opacity: 0.8;
}

.page-faq .faq-tip {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  background: var(--faq-green-dim);
  border-left: 3px solid var(--c-green);
  color: var(--c-silver);
  font-size: 0.85rem;
  line-height: 1.7;
}

.page-faq .faq-tip p {
  margin: 0;
}

.page-faq .faq-tip code {
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--c-green);
  background: rgba(0, 255, 163, 0.1);
  padding: 0.12rem 0.35rem;
}

/* ---- 账号安全 ---- */
.page-faq .faq-security-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
  align-items: start;
}

.page-faq .faq-security-tips {
  display: grid;
  gap: 0.55rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-security-tips li {
  position: relative;
  padding: 0.6rem 0.6rem 0.6rem 2.1rem;
  background: rgba(10, 17, 40, 0.55);
  color: var(--c-silver);
  font-size: 0.84rem;
  line-height: 1.5;
  border: 1px solid var(--faq-border);
}

.page-faq .faq-security-tips li::before {
  content: "→";
  position: absolute;
  left: 0.8rem;
  color: var(--c-orange);
  font-weight: 700;
}

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

.page-faq .faq-security-figure img {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  border: 1px solid var(--faq-border);
  clip-path: var(--clip-cut);
  background: var(--c-ocean);
}

.page-faq .faq-security-figure figcaption {
  margin-top: 0.55rem;
  font-size: 0.75rem;
  color: var(--c-silver);
  opacity: 0.7;
}

/* ---- 联系章节 ---- */
.page-faq .faq-contact-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-faq .faq-contact-item {
  background: var(--faq-card-bg-2);
  border: 1px solid var(--faq-border);
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-contact-item::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 22px 22px 0;
  border-color: transparent var(--c-orange) transparent transparent;
  opacity: 0.7;
}

.page-faq .faq-contact-icon {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-green);
  border: 1px solid rgba(0, 255, 163, 0.35);
  padding: 0.2rem 0.45rem;
  margin-bottom: 0.75rem;
}

.page-faq .faq-contact-item h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--c-white);
}

.page-faq .faq-contact-item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--c-silver);
  word-break: break-all;
}

.page-faq .faq-contact-item a {
  color: var(--c-green);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.page-faq .faq-contact-item a:hover {
  color: #B3FFE0;
}

/* ---- 侧栏 ---- */
.page-faq .faq-sidebar {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

.page-faq .faq-contact-card {
  position: sticky;
  top: calc(var(--header-h) + 1rem);
  background:
    linear-gradient(135deg, rgba(18, 34, 74, 0.95), rgba(10, 17, 40, 0.95)),
    var(--c-ocean);
  border: 1px solid var(--faq-border);
  padding: 1.5rem;
  clip-path: var(--clip-cut);
}

.page-faq .faq-contact-card h2 {
  margin: 0.75rem 0 0.5rem;
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--c-white);
}

.page-faq .faq-contact-intro {
  margin: 0 0 1.25rem;
  color: var(--c-silver);
  font-size: 0.84rem;
  line-height: 1.6;
}

.page-faq .faq-contact-list {
  display: grid;
  gap: 0.9rem;
  margin: 0;
}

.page-faq .faq-contact-list .contact-row {
  border-left: 2px solid var(--c-green);
  padding-left: 0.85rem;
}

.page-faq .faq-contact-list .contact-label {
  margin-bottom: 0.15rem;
}

.page-faq .faq-contact-list .contact-value {
  font-size: 0.9rem;
  line-height: 1.45;
}

.page-faq .faq-contact-list a {
  color: var(--c-green);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-faq .faq-contact-list a:hover {
  color: #B3FFE0;
}

.page-faq .faq-contact-card .contact-note {
  margin: 1rem 0 1.25rem;
}

.page-faq .faq-btn-block {
  display: block;
  width: 100%;
  text-align: center;
  box-sizing: border-box;
}

/* ---- 热门标签 ---- */
.page-faq .faq-hot-tags {
  background: var(--faq-card-bg-2);
  border: 1px solid var(--faq-border);
  padding: 1.25rem;
}

.page-faq .faq-hot-tags h3 {
  margin: 0 0 1rem;
  font-family: var(--font-head);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--c-white);
}

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

.page-faq .faq-tag-cloud .tag {
  text-decoration: none;
  font-size: 0.78rem;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.page-faq .faq-tag-cloud .tag:hover {
  border-color: var(--c-green);
  background: var(--faq-green-dim);
  color: var(--c-green);
}

/* ---- SEO 信息块 ---- */
.page-faq .faq-seo {
  padding-bottom: 2rem;
}

.page-faq .faq-seo-inner {
  border: 1px solid var(--faq-border);
  background: rgba(18, 34, 74, 0.45);
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--c-orange);
}

.page-faq .faq-seo-inner p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--c-silver);
}

.page-faq .faq-seo-inner strong {
  color: var(--c-white);
  font-weight: 700;
}

/* ---- 底部联系引导 ---- */
.page-faq .faq-bottom-cta {
  border-top: 1px solid var(--faq-border);
  padding: 2.5rem 0 3rem;
  background:
    radial-gradient(circle at 78% 40%, rgba(255, 107, 53, 0.1) 0%, transparent 42%),
    var(--c-deep);
}

.page-faq .faq-bottom-inner {
  display: grid;
  gap: 1.5rem;
  align-items: center;
}

.page-faq .faq-bottom-copy h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--c-white);
}

.page-faq .faq-bottom-copy p {
  margin: 0;
  color: var(--c-silver);
  font-size: 0.85rem;
  line-height: 1.6;
}

.page-faq .faq-bottom-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-faq .faq-bottom-actions .btn-primary,
.page-faq .faq-bottom-actions .btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.4rem;
  white-space: nowrap;
}

/* ---- 动效尊重 ---- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-q-icon::before,
  .page-faq .faq-q-icon::after,
  .page-faq .faq-contact-list a,
  .page-faq .faq-contact-item a {
    transition: none;
  }
}

/* ---- 平板 / 桌面断点 ---- */
@media (min-width: 640px) {
  .page-faq .faq-contact-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 768px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
  }

  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1.65fr) minmax(280px, 0.75fr);
    gap: 2rem;
    align-items: start;
  }

  .page-faq .faq-compat {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-security-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2rem;
  }

  .page-faq .faq-bottom-inner {
    grid-template-columns: 1fr auto;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1.75fr) minmax(320px, 0.72fr);
    gap: 2.5rem;
  }

  .page-faq .faq-hero-copy p {
    font-size: 1rem;
  }

  .page-faq .faq-q-text {
    font-size: 0.96rem;
  }

  .page-faq .faq-a {
    font-size: 0.9rem;
  }
}