/* roulang page: index */
:root {
    --bg: #0A0E17;
    --panel: #111827;
    --inset: #0D1420;
    --neon: #38E6C8;
    --vio: #A78BFA;
    --ok: #4ADE80;
    --text: #F1F5F9;
    --muted: #94A3B8;
    --border: rgba(148, 163, 184, 0.18);
    --radius: 16px;
  }
  * {
    box-sizing: border-box;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    margin: 0;
    background: var(--bg);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    line-height: 1.75;
  }
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  a {
    color: inherit;
    text-decoration: none;
  }
  button, input, select, textarea {
    font-family: inherit;
  }
  :focus-visible {
    outline: 2px solid var(--neon);
    outline-offset: 2px;
  }
  .container-x {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }
  .top-neon-line {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--neon), var(--vio), transparent);
  }
  .header-mask {
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    background: rgba(10, 14, 23, 0.72);
  }
  .neon-active {
    color: var(--neon) !important;
  }
  .nav-link {
    color: #cbd5e1;
    font-size: 15px;
    font-weight: 500;
    padding: 8px 2px;
    position: relative;
    transition: color 0.2s ease;
  }
  .nav-link:hover,
  .nav-link.active {
    color: var(--neon);
  }
  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: var(--neon);
    box-shadow: 0 0 12px rgba(56, 230, 200, 0.6);
  }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--neon);
    color: #06231d;
    font-weight: 700;
    border-radius: 10px;
    padding: 12px 22px;
    border: 1px solid transparent;
    transition: all 0.2s ease;
    box-shadow: 0 0 18px rgba(56, 230, 200, 0.16);
    font-size: 15px;
  }
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 26px rgba(56, 230, 200, 0.35);
    background: #5ef0d5;
  }
  .btn-primary:active {
    transform: translateY(0);
  }
  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--neon);
    border: 1px solid rgba(56, 230, 200, 0.55);
    border-radius: 10px;
    padding: 12px 22px;
    font-weight: 600;
    transition: all 0.2s ease;
    font-size: 15px;
  }
  .btn-ghost:hover {
    background: rgba(56, 230, 200, 0.09);
    border-color: var(--neon);
    box-shadow: 0 0 18px rgba(56, 230, 200, 0.08);
  }
  .card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.2s ease;
  }
  .card:hover {
    border-color: rgba(56, 230, 200, 0.45);
    box-shadow: 0 8px 40px rgba(56, 230, 200, 0.12);
    transform: translateY(-2px);
  }
  .tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    line-height: 1.4;
    background: rgba(56, 230, 200, 0.08);
    color: var(--neon);
    border: 1px solid rgba(56, 230, 200, 0.18);
  }
  .tag-violet {
    background: rgba(167, 139, 250, 0.1);
    color: var(--vio);
    border: 1px solid rgba(167, 139, 250, 0.22);
  }
  .metric-number {
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
  }
  .badge-green {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--ok);
    background: rgba(74, 222, 128, 0.12);
    border: 1px solid rgba(74, 222, 128, 0.25);
    border-radius: 999px;
    padding: 3px 10px;
  }
  .arrow-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--neon);
    font-size: 13px;
    font-weight: 600;
    transition: gap 0.2s ease;
  }
  .arrow-link:hover {
    gap: 10px;
    color: #8af2de;
  }
  .section-padding {
    padding-top: 96px;
    padding-bottom: 96px;
  }
  .section-title {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.02em;
  }
  .section-desc {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.8;
    margin-top: 12px;
  }
  .form-input {
    background: var(--inset);
    border: 1px solid rgba(148, 163, 184, 0.18);
    color: var(--text);
    border-radius: 10px;
    padding: 11px 14px;
    font-size: 14px;
    width: 100%;
    transition: border-color 0.2s, box-shadow 0.2s;
  }
  .form-input::placeholder {
    color: rgba(255, 255, 255, 0.35);
  }
  .form-input:focus {
    outline: none;
    border-color: var(--neon);
    box-shadow: 0 0 0 3px rgba(56, 230, 200, 0.15);
  }
  select.form-input option {
    background: #111827;
    color: #e5e7eb;
  }
  .table-compare table {
    width: 100%;
    border-collapse: collapse;
  }
  .table-compare th,
  .table-compare td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
    font-size: 14px;
  }
  .table-compare th {
    color: var(--muted);
    font-weight: 600;
  }
  .table-compare tr:last-child td {
    border-bottom: none;
  }
  details.faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    font-weight: 600;
    font-size: 16px;
    transition: color 0.2s ease;
    user-select: none;
  }
  details.faq-item summary::-webkit-details-marker {
    display: none;
  }
  details.faq-item summary:hover {
    color: var(--neon);
  }
  details.faq-item .faq-icon {
    flex: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid rgba(148, 163, 184, 0.35);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.25s ease, border-color 0.25s, color 0.25s;
    color: var(--muted);
  }
  details.faq-item[open] summary {
    color: var(--neon);
  }
  details.faq-item[open] .faq-icon {
    transform: rotate(45deg);
    border-color: var(--neon);
    color: var(--neon);
  }
  .footer-nav a {
    font-size: 14px;
    color: var(--muted);
    transition: color 0.2s ease;
  }
  .footer-nav a:hover {
    color: var(--neon);
  }
  @media (max-width: 1023px) {
    .section-padding {
      padding-top: 72px;
      padding-bottom: 72px;
    }
    .section-title {
      font-size: 28px;
    }
  }
  @media (max-width: 640px) {
    .container-x {
      padding-left: 18px;
      padding-right: 18px;
    }
    .section-padding {
      padding-top: 60px;
      padding-bottom: 60px;
    }
    .section-title {
      font-size: 24px;
    }
  }

/* roulang page: category1 */
:root {
  --bg: #0A0E17;
  --panel: #111827;
  --inset: #0D1420;
  --neon: #38E6C8;
  --vio: #A78BFA;
  --ok: #4ADE80;
  --text: #F1F5F9;
  --muted: #94A3B8;
  --border: rgba(148, 163, 184, 0.18);
  --radius: 16px;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  line-height: 1.75;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button, input, select, textarea {
  font-family: inherit;
}
.container-x {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.header-mask {
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(10, 14, 23, 0.78);
}
.nav-link {
  color: #cbd5e1;
  font-size: 15px;
  font-weight: 500;
  padding: 8px 2px;
  position: relative;
  transition: color 0.2s ease;
}
.nav-link:hover,
.nav-link.active {
  color: var(--neon);
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--neon);
  box-shadow: 0 0 12px rgba(56, 230, 200, 0.6);
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--neon);
  color: #06231d;
  font-weight: 700;
  border-radius: 10px;
  padding: 11px 20px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
  box-shadow: 0 0 18px rgba(56, 230, 200, 0.16);
  font-size: 15px;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 26px rgba(56, 230, 200, 0.35);
  background: #5ef0d5;
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--neon);
  border: 1px solid rgba(56, 230, 200, 0.55);
  border-radius: 10px;
  padding: 11px 20px;
  font-weight: 600;
  transition: all 0.2s ease;
  font-size: 15px;
}
.btn-ghost:hover {
  background: rgba(56, 230, 200, 0.09);
  border-color: var(--neon);
  box-shadow: 0 0 18px rgba(56, 230, 200, 0.08);
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.2s ease;
}
.card:hover {
  border-color: rgba(56, 230, 200, 0.45);
  box-shadow: 0 8px 40px rgba(56, 230, 200, 0.12);
  transform: translateY(-2px);
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  line-height: 1.4;
  background: rgba(56, 230, 200, 0.08);
  color: var(--neon);
  border: 1px solid rgba(56, 230, 200, 0.18);
}
.tag-violet {
  background: rgba(167, 139, 250, 0.1);
  color: var(--vio);
  border: 1px solid rgba(167, 139, 250, 0.22);
}
.badge-green {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--ok);
  background: rgba(74, 222, 128, 0.12);
  border: 1px solid rgba(74, 222, 128, 0.25);
  border-radius: 999px;
  padding: 3px 10px;
}
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--neon);
  font-size: 13px;
  font-weight: 600;
  transition: gap 0.2s ease;
}
.arrow-link:hover {
  gap: 10px;
  color: #8af2de;
}
.section-padding {
  padding-top: 96px;
  padding-bottom: 96px;
}
.section-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
}
.section-desc {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  margin-top: 12px;
}
.form-input {
  background: var(--inset);
  border: 1px solid rgba(148, 163, 184, 0.18);
  color: var(--text);
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 14px;
  width: 100%;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-input::placeholder {
  color: rgba(255, 255, 255, 0.35);
}
.form-input:focus {
  outline: none;
  border-color: var(--neon);
  box-shadow: 0 0 0 3px rgba(56, 230, 200, 0.15);
}
select.form-input option {
  background: #111827;
  color: #e5e7eb;
}
details.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-weight: 600;
  font-size: 16px;
  transition: color 0.2s ease;
  user-select: none;
}
details.faq-item summary::-webkit-details-marker {
  display: none;
}
details.faq-item summary:hover {
  color: var(--neon);
}
details.faq-item .faq-icon {
  flex: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid rgba(148, 163, 184, 0.35);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.25s ease, border-color 0.25s, color 0.25s;
  color: var(--muted);
}
details.faq-item[open] summary {
  color: var(--neon);
}
details.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  border-color: var(--neon);
  color: var(--neon);
}
.footer-nav a {
  font-size: 14px;
  color: var(--muted);
  transition: color 0.2s ease;
}
.footer-nav a:hover {
  color: var(--neon);
}
.filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 17px;
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
  color: #cbd5e1;
  background: rgba(148, 163, 184, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.2);
  transition: all 0.2s ease;
  cursor: pointer;
}
.filter-btn:hover {
  border-color: rgba(56, 230, 200, 0.55);
  color: var(--neon);
}
.filter-btn.active {
  background: var(--neon);
  border-color: var(--neon);
  color: #06231d;
  font-weight: 700;
  box-shadow: 0 0 16px rgba(56, 230, 200, 0.25);
}
.scrollbar-hide::-webkit-scrollbar {
  display: none;
}
.scrollbar-hide {
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.category-card {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: 18px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}
.category-card:hover {
  border-color: rgba(56, 230, 200, 0.45);
  box-shadow: 0 8px 40px rgba(56, 230, 200, 0.12);
  background: rgba(17, 24, 39, 0.85);
}
.vert-card-thumb {
  border-radius: 14px;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  width: 100%;
  background: #0D1420;
}
.page-btn {
  min-width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  padding: 0 10px;
  font-size: 14px;
  font-weight: 600;
  color: #cbd5e1;
  background: transparent;
  border: 1px solid rgba(148, 163, 184, 0.2);
  transition: all 0.2s ease;
  cursor: pointer;
}
.page-btn.active {
  background: var(--neon);
  border-color: var(--neon);
  color: #06231d;
  box-shadow: 0 0 14px rgba(56, 230, 200, 0.25);
}
.page-btn.disabled {
  color: #64748b;
  pointer-events: none;
  opacity: 0.55;
}
.faq-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 20px;
  transition: border-color 0.2s ease;
}
.faq-card:hover {
  border-color: rgba(56, 230, 200, 0.35);
}
.sidebar-link {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  padding: 7px 0;
  border-bottom: 1px dashed rgba(148, 163, 184, 0.16);
  transition: color 0.2s ease;
}
.sidebar-link span {
  color: var(--neon);
  font-weight: 700;
  flex: none;
}
.sidebar-link:hover {
  color: var(--text);
}
.tag-mini {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(56, 230, 200, 0.07);
  border: 1px solid rgba(56, 230, 200, 0.16);
  color: var(--neon);
  font-size: 12px;
  border-radius: 999px;
  padding: 3px 9px;
}
.header-logo-icon {
  color: var(--neon);
  filter: drop-shadow(0 0 6px rgba(56, 230, 200, 0.6));
}
@media (max-width: 1023px) {
  .section-padding {
    padding-top: 72px;
    padding-bottom: 72px;
  }
  .section-title {
    font-size: 28px;
  }
}
@media (max-width: 640px) {
  .container-x {
    padding-left: 18px;
    padding-right: 18px;
  }
  .section-padding {
    padding-top: 60px;
    padding-bottom: 60px;
  }
  .section-title {
    font-size: 24px;
  }
}