/* roulang page: index */
@theme {
    --font-sans: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  }

:root {
    --bg-deep: #060B14;
    --bg-panel: #0A1524;
    --surface: #0E1C30;
    --line: rgba(255, 255, 255, .08);
    --line-strong: rgba(255, 255, 255, .14);
    --text-head: #F0F7FF;
    --text-body: #D5E3F3;
    --text-muted: #93A4BC;
    --energy: #5EF0C8;
    --energy-soft: rgba(94, 240, 200, 0.14);
    --blue-accent: #2F7BFF;
    --link-light: #8AB8FF;
    --radius-lg: 1.5rem;
    --radius-xl: 1.75rem;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    background-color: var(--bg-deep);
    color: var(--text-body);
    font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
  }

  h1, h2, h3, h4, h5 {
    color: var(--text-head);
    font-weight: 800;
    letter-spacing: -0.02em;
  }

  .container-x {
    width: 100%;
    max-width: 80rem;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  @media (min-width: 768px) {
    .container-x {
      padding-left: 2rem;
      padding-right: 2rem;
    }
  }

  .card-panel {
    background: linear-gradient(160deg, rgba(14, 28, 48, .86), rgba(10, 21, 36, .94));
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 1.25rem;
  }

  .card-panel-hover {
    transition: background .3s ease, border-color .3s ease, transform .3s ease, box-shadow .3s ease;
  }

  .card-panel-hover:hover {
    background: linear-gradient(160deg, rgba(18, 36, 61, .9), rgba(10, 21, 36, .94));
    border-color: rgba(255, 255, 255, .15);
    transform: translateY(-3px);
    box-shadow: 0 16px 40px -24px rgba(0, 0, 0, .8);
  }

  .glass-panel {
    background: linear-gradient(135deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .02));
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, .08);
  }

  .section-overline {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .25rem .75rem;
    font-size: 13px;
    font-weight: 600;
    color: var(--energy);
    background: var(--energy-soft);
    border-radius: 999px;
    border: 1px solid rgba(94, 240, 200, .12);
    letter-spacing: .02em;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    font-weight: 700;
    border-radius: .85rem;
    padding: .85rem 1.5rem;
    transition: all .3s ease;
    cursor: pointer;
    text-decoration: none;
    border: 1px solid transparent;
    font-size: 1rem;
  }

  .btn:focus-visible {
    outline: 2px solid var(--energy);
    outline-offset: 3px;
  }

  .btn-primary {
    background: linear-gradient(135deg, rgba(47, 123, 255, .95), rgba(35, 92, 214, .95));
    color: #fff;
    border-color: rgba(120, 180, 255, .25);
    box-shadow: 0 8px 30px -12px rgba(47, 123, 255, .65);
  }

  .btn-primary:hover {
    background: linear-gradient(135deg, rgba(64, 140, 255, 1), rgba(42, 103, 229, 1));
    transform: translateY(-2px);
    box-shadow: 0 14px 38px -12px rgba(47, 123, 255, .75);
  }

  .btn-primary:active {
    transform: translateY(0);
  }

  .btn-ghost {
    background: transparent;
    color: var(--text-head);
    border-color: rgba(255, 255, 255, .18);
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, .08);
    border-color: rgba(255, 255, 255, .34);
  }

  .btn-success {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #242A35, #111B2C);
    border: 1px solid rgba(94, 240, 200, .16);
    color: #E8FFF7;
    box-shadow: inset 0 0 22px rgba(94, 240, 200, .03);
  }

  .btn-success:hover {
    border-color: rgba(94, 240, 200, .5);
    box-shadow: inset 0 0 22px rgba(94, 240, 200, .1), 0 10px 36px -14px rgba(94, 240, 200, .22);
  }

  .section {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }

  @media (min-width: 768px) {
    .section {
      padding-top: 7rem;
      padding-bottom: 7rem;
    }
  }

  .eyebrow-number {
    font-family: "Inter", monospace;
    color: var(--energy);
  }

  .text-gradient {
    background: linear-gradient(170deg, #F0F7FF 10%, #5EF0C8 62%, #8AB8FF 90%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  a {
    color: inherit;
  }

  .text-link {
    color: var(--link-light);
    text-decoration: none;
    transition: color .2s;
  }

  .text-link:hover {
    color: #E6F4FF;
  }

  .grid-pattern {
    background-image:
      linear-gradient(rgba(255, 255, 255, .03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255, 255, 255, .03) 1px, transparent 1px);
    background-size: 45px 45px;
    -webkit-mask-image: radial-gradient(ellipse at 70% 20%, #000 30%, transparent 75%);
    mask-image: radial-gradient(ellipse at 70% 20%, #000 30%, transparent 75%);
  }

  .channel-link {
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
    padding: .55rem 1.05rem;
    border-radius: 2rem;
    font-size: 14px;
    font-weight: 600;
    color: rgba(214, 231, 245, .72);
    transition: all .3s;
    gap: .4rem;
  }

  .channel-link:hover {
    color: #EAF6FF;
    background: rgba(255, 255, 255, .06);
  }

  .channel-link.active {
    color: #F0F7FF;
    background: rgba(94, 240, 200, .1);
    box-shadow: inset 0 0 0 1px rgba(94, 240, 200, .22);
  }

  .channel-link.active::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 99px;
    background: var(--energy);
    box-shadow: 0 0 10px var(--energy);
  }

  .news-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  @media (min-width: 1024px) {
    .news-row {
      grid-template-columns: 1.4fr 1fr;
    }
  }

  .news-row-item {
    display: flex;
    gap: 1rem;
    padding: 1.25rem;
    border-radius: 1.25rem;
    background: rgba(10, 21, 36, .72);
    border: 1px solid rgba(255, 255, 255, .07);
    transition: border-color .3s, background .3s, transform .3s;
  }

  .news-row-item:hover {
    border-color: rgba(94, 240, 200, .24);
    background: rgba(16, 30, 48, .9);
    transform: translateX(2px);
  }

  .news-thumb {
    width: 180px;
    min-width: 180px;
    aspect-ratio: 16 / 10;
    background: #0E1C30;
    border-radius: .8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(140, 190, 230, .35);
    overflow: hidden;
    position: relative;
  }

  .news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  @media (max-width: 640px) {
    .news-row-item {
      flex-direction: column;
    }

    .news-thumb {
      width: 100%;
    }
  }

  .faq-item {
    background: rgba(10, 21, 36, .7);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 1.25rem;
    overflow: hidden;
    transition: border-color .3s, background .3s;
  }

  .faq-item:hover {
    border-color: rgba(94, 240, 200, .18);
    background: rgba(14, 28, 48, .82);
  }

  .faq-question-button {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1.1rem 1.25rem;
    text-align: left;
    border: 0;
    background: transparent;
    color: var(--text-head);
    font-weight: 700;
    font-size: 1.02rem;
    cursor: pointer;
    transition: color .25s;
  }

  .faq-question-button:hover {
    color: var(--energy);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .4s ease, padding .3s ease;
    color: var(--text-body);
    padding: 0 1.25rem;
  }

  .faq-answer.open {
    max-height: 460px;
    padding-bottom: 1.25rem;
  }

  .faq-arrow {
    transition: transform .3s ease;
    color: var(--text-muted);
  }

  .faq-arrow.open {
    transform: rotate(180deg);
    color: var(--energy);
  }

  .footer-section {
    background: #04070C;
    border-top: 1px solid rgba(255, 255, 255, .06);
  }

  .floating-cta {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 70;
  }

  .floating-cta__main {
    width: 3.5rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(47, 123, 255, .95), rgba(24, 70, 162, .9));
    border: 1px solid rgba(94, 240, 200, .28);
    cursor: pointer;
    box-shadow: 0 18px 50px -16px rgba(47, 123, 255, .64);
    transition: transform .3s ease, box-shadow .3s ease;
    color: #fff;
  }

  .floating-cta__main:hover {
    transform: translateY(-3px);
    box-shadow: 0 22px 60px -18px rgba(94, 240, 200, .45);
  }

  .floating-cta__menu {
    position: absolute;
    right: 0;
    bottom: 4.2rem;
    width: 14rem;
    padding: .5rem;
    border-radius: 1.1rem;
    background: linear-gradient(135deg, rgba(15, 25, 40, .88), rgba(7, 12, 22, .86));
    backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, .1);
    box-shadow: 0 24px 80px -20px rgba(0, 0, 0, .8);
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px) scale(.98);
    transition: opacity .25s, transform .25s;
  }

  .floating-cta__menu.open {
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .floating-cta__link {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .7rem .9rem;
    border-radius: .8rem;
    color: #D9E9FA;
    font-size: .9rem;
    font-weight: 600;
    text-decoration: none;
    transition: background .2s, color .2s;
  }

  .floating-cta__link:hover {
    background: rgba(94, 240, 200, .1);
    color: #5EF0C8;
  }

  .hero-login-input {
    width: 100%;
    padding: .85rem 1rem;
    background: rgba(4, 10, 18, .68);
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: .9rem;
    color: #F0F7FF;
    font-size: .95rem;
    transition: border-color .25s, box-shadow .25s, background .25s;
  }

  .hero-login-input:focus {
    outline: none;
    border-color: rgba(94, 240, 200, .7);
    box-shadow: 0 0 0 3px rgba(94, 240, 200, .1);
    background: rgba(7, 14, 25, .9);
  }

  .hero-login-input::placeholder {
    color: rgba(147, 164, 188, .7);
  }

  .field-label {
    display: block;
    font-size: .85rem;
    font-weight: 600;
    color: #A9BFDA;
    margin-bottom: .4rem;
  }

  .checkbox-soft {
    accent-color: #5EF0C8;
  }

  .mini-brand {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font-weight: 800;
    color: #F0F7FF;
    text-decoration: none;
  }

  .pricing-card {
    background: linear-gradient(160deg, rgba(14, 28, 48, .82), rgba(8, 18, 32, .94));
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 1.5rem;
    padding: 2rem;
    transition: all .3s;
  }

  .pricing-card:hover {
    border-color: rgba(255, 255, 255, .16);
    transform: translateY(-4px);
  }

  .pricing-card.recommend {
    background: linear-gradient(160deg, rgba(20, 44, 72, .92), rgba(6, 18, 34, .98));
    border: 1px solid rgba(94, 240, 200, .3);
    box-shadow: 0 0 50px -18px rgba(94, 240, 200, .3), 0 26px 90px -30px rgba(0, 0, 0, .9);
  }

  .nav-backdrop {
    background: rgba(6, 11, 20, .76);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    transition: box-shadow .4s, background .3s;
  }

  .site-header.is-stuck {
    background: rgba(6, 11, 20, .78);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
    box-shadow: 0 12px 40px -28px rgba(0, 0, 0, .8);
  }

  .header-meta-row {
    transition: max-height .4s ease, opacity .3s ease, padding .3s ease;
    max-height: 120px;
    opacity: 1;
  }

  .is-stuck .header-meta-row {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding-top: 0;
    padding-bottom: 0;
  }

  .header-channel-row {
    transition: padding .3s, background .3s;
  }

  .is-stuck .header-channel-row {
    padding-top: .45rem;
    padding-bottom: .45rem;
  }

  .hero-panel {
    border-radius: 1.75rem;
  }

  .section-divider {
    border: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(94, 240, 200, .14), transparent);
    margin: 0;
  }

  ::selection {
    background: rgba(94, 240, 200, .18);
    color: #E8FFF7;
  }

  img {
    max-width: 100%;
    height: auto;
  }

  button, input, select, textarea {
    font-family: inherit;
  }

  .font-mono-num {
    font-family: "SFMono-Regular", "Cascadia Code", monospace;
  }

/* roulang page: category1 */
:root {
  --bg-deep: #060b14;
  --bg-dark: #0a1524;
  --bg-panel: #0e1c30;
  --bg-panel-soft: rgba(255, 255, 255, .04);
  --stroke-soft: rgba(255, 255, 255, .08);
  --stroke-strong: rgba(255, 255, 255, .14);
  --brand: #5ef0c8;
  --brand-glow: rgba(94, 240, 200, .16);
  --blue: #2f7bff;
  --blue-soft: rgba(47, 123, 255, .2);
  --text-body: #d8e2f0;
  --text-muted: #8fa2ba;
  --text-dim: #5b6c84;
  --radius-2xl: 1rem;
  --shadow-panel: 0 1rem 3rem rgba(0, 0, 0, .24);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--text-body);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.6;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color .2s ease, background-color .2s ease, border-color .2s ease, opacity .2s ease, transform .2s ease; }
button, input, select, textarea { font-family: inherit; color: inherit; }
button { cursor: pointer; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 6px;
}
.container-x {
  width: 100%;
  max-width: 80rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}
.text-brand { color: var(--brand); }
.bg-brand { background-color: var(--brand); }
.border-brand { border-color: var(--brand); }
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(6, 11, 20, .68);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: background-color .3s ease, box-shadow .3s ease;
}
.site-header.is-scrolled {
  background: rgba(6, 11, 20, .92);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .05);
}
.header-meta-row {
  max-height: 120px;
  opacity: 1;
  transition: max-height .35s ease, opacity .3s ease, padding .3s ease;
}
.site-header.is-scrolled .header-meta-row {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  pointer-events: none;
}
.site-header.is-scrolled .header-channel-row {
  border-top-color: rgba(255, 255, 255, .05);
  background: transparent;
}
.scrollbar-none {
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.scrollbar-none::-webkit-scrollbar { display: none; }
.channel-link {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  gap: .4rem;
  padding: .5rem .7rem;
  border-radius: .75rem;
  font-size: .875rem;
  font-weight: 500;
  color: #a6b6cc;
  transition: color .2s ease, background-color .2s ease;
}
.channel-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, .05);
}
.channel-link.active {
  color: #fff;
  background: rgba(255, 255, 255, .06);
}
.channel-link.active::before {
  content: "";
  width: .35rem;
  height: .35rem;
  border-radius: 999px;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(94, 240, 200, .1), 0 0 10px rgba(94, 240, 200, .5);
}
.card-panel {
  position: relative;
  border-radius: 1rem;
  background: rgba(14, 28, 48, .72);
  border: 1px solid rgba(255, 255, 255, .08);
  box-shadow: 0 .75rem 2rem rgba(0, 0, 0, .15);
  transition: transform .25s ease, border-color .25s ease, background-color .25s ease;
}
.card-panel:hover {
  transform: translateY(-3px);
  border-color: rgba(94, 240, 200, .24);
  background: rgba(16, 34, 56, .8);
}
.glass-panel {
  background: linear-gradient(135deg, rgba(255, 255, 255, .1), rgba(255, 255, 255, .02));
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 1.75rem;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}
.bg-grid-soft {
  background-image: linear-gradient(rgba(94, 240, 200, .035) 1px, transparent 1px), linear-gradient(90deg, rgba(94, 240, 200, .035) 1px, transparent 1px);
  background-size: 44px 44px;
}
.cover-background-fallback {
  background-color: #0e1c30;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.faq-item {
  border: 1px solid rgba(255, 255, 255, .07);
  border-radius: 1rem;
  background: rgba(10, 21, 36, .8);
  overflow: hidden;
  transition: border-color .2s ease;
}
.faq-item.active {
  border-color: rgba(94, 240, 200, .22);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.2rem;
  text-align: left;
  background: transparent;
  border: 0;
  font-size: 1rem;
  font-weight: 600;
  color: #e6effc;
}
.faq-q svg {
  flex-shrink: 0;
  transition: transform .3s ease;
}
.faq-item.active .faq-q svg {
  transform: rotate(180deg);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}
.faq-a-inner {
  padding: 0 1.2rem 1.2rem;
  color: #a8b9ce;
  line-height: 1.9;
  font-size: .925rem;
}
.floating-cta {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 90;
}
.floating-cta-panel {
  opacity: 0;
  pointer-events: none;
  transform: translateY(.75rem);
  transition: opacity .25s ease, transform .25s ease;
}
.floating-cta.open .floating-cta-panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.floating-btn {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .16);
  background: linear-gradient(135deg, rgba(47, 123, 255, .95), rgba(24, 91, 201, .92));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 .6rem 1.4rem rgba(0, 0, 0, .35), 0 0 0 4px rgba(94, 240, 200, .08);
  transition: box-shadow .2s ease, transform .2s ease;
}
.floating-btn:hover {
  transform: scale(1.04);
  box-shadow: 0 .8rem 1.8rem rgba(28, 119, 255, .3), 0 0 0 6px rgba(94, 240, 200, .14);
}
.footer-section {
  background: #04070c;
}
.text-muted-copy { color: #8fa2ba; }
.eyebrow-box {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--brand);
  border: 1px solid rgba(94, 240, 200, .18);
  background: rgba(94, 240, 200, .05);
  padding: .35rem .75rem;
  border-radius: 999px;
}
.section-help-icon {
  width: 3.25rem;
  height: 3.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 1rem;
  background: rgba(47, 123, 255, .16);
  border: 1px solid rgba(47, 123, 255, .18);
  color: #8dbaff;
}
.step-rail {
  border: 1px solid rgba(255, 255, 255, .07);
  background: rgba(12, 22, 36, .65);
  border-radius: 1.25rem;
}
.screen-mock {
  border-radius: 1rem;
  overflow: hidden;
  background: #0a131f;
  border: 1px solid rgba(255, 255, 255, .08);
}
.screen-topbar {
  background: rgba(255, 255, 255, .04);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
  display: flex;
  align-items: center;
  gap: .35rem;
  padding: .65rem .8rem;
}
@media (max-width: 767px) {
  .floating-cta {
    right: .75rem;
    bottom: calc(.75rem + env(safe-area-inset-bottom));
  }
}

/* roulang page: article */
:root {
    --bg-page: #060B14;
    --bg-panel: #0A1524;
    --bg-surface: #0E1C30;
    --brand: #5EF0C8;
    --brand-deep: #3ECCA8;
    --blue-accent: #2F7BFF;
    --text-main: #E6F4FF;
    --text-body: #B6C7DA;
    --text-muted: #7F93A8;
    --border-subtle: rgba(255, 255, 255, .08);
    --radius-lg: .875rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --shift: cubic-bezier(.4, 0, .2, 1);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
    background: var(--bg-page);
  }

  body {
    margin: 0;
    min-height: 100vh;
    background:
      radial-gradient(1100px 480px at 78% -10%, rgba(47, 123, 255, .12), transparent 60%),
      radial-gradient(900px 420px at 8% -8%, rgba(94, 240, 200, .08), transparent 55%),
      var(--bg-page);
    color: var(--text-main);
    font-family: Inter, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

  body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image:
      linear-gradient(rgba(255, 255, 255, .025) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255, 255, 255, .02) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: linear-gradient(to bottom, black, transparent 80%);
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  a:focus-visible,
  button:focus-visible,
  input:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 3px;
  }

  img {
    max-width: 100%;
  }

  ::selection {
    background: rgba(94, 240, 200, .3);
    color: #fff;
  }

  .container-x {
    width: 100%;
    max-width: 80rem;
    margin-inline: auto;
    padding-inline: 1rem;
  }

  @media (min-width: 768px) {
    .container-x {
      padding-inline: 2rem;
    }
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(6, 11, 20, .78);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    border-bottom: 1px solid rgba(255, 255, 255, .05);
    transition: background .35s var(--shift), box-shadow .35s var(--shift);
  }

  .site-header.is-scrolled {
    background: rgba(5, 9, 16, .92);
    box-shadow: 0 18px 42px rgba(0, 0, 0, .35);
  }

  .channel-row-box {
    scrollbar-width: none;
  }

  .channel-row-box::-webkit-scrollbar {
    display: none;
  }

  .channel-link {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    white-space: nowrap;
    border-radius: 999px;
    padding: .5rem .95rem;
    font-size: .875rem;
    font-weight: 600;
    color: #A7B8CA;
    transition: color .2s var(--shift), background .2s var(--shift);
  }

  .channel-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, .05);
  }

  .channel-link .status-dot {
    width: .34rem;
    height: .34rem;
    border-radius: 999px;
    background: transparent;
    transition: background .2s;
  }

  .channel-active {
    color: #fff;
  }

  .channel-active .status-dot {
    background: var(--brand);
    box-shadow: 0 0 10px rgba(94, 240, 200, .9);
  }

  .channel-active::after {
    content: '';
    position: absolute;
    left: 1rem;
    right: 1rem;
    bottom: .1rem;
    height: 2px;
    border-radius: 2px;
    background: var(--brand);
    opacity: .8;
  }

  .glass-panel {
    background: linear-gradient(135deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .025));
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, .09);
  }

  .card-panel {
    background: linear-gradient(180deg, rgba(255, 255, 255, .045), rgba(255, 255, 255, .012));
    border: 1px solid rgba(255, 255, 255, .07);
    border-radius: var(--radius-2xl);
    transition: transform .3s var(--shift), border-color .3s var(--shift), box-shadow .3s var(--shift);
  }

  .card-panel:hover {
    border-color: rgba(255, 255, 255, .13);
  }

  .soft-badge {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    border-radius: 999px;
    border: 1px solid rgba(94, 240, 200, .24);
    background: rgba(94, 240, 200, .08);
    padding: .15rem .7rem;
    font-size: .75rem;
    font-weight: 600;
    color: #9FF5DE;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: .875rem;
    padding: .7rem 1.25rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all .25s var(--shift);
  }

  .btn-primary {
    background: linear-gradient(135deg, #78F8D6, #43CDA8);
    color: #06231C;
    box-shadow: 0 0 0 rgba(94, 240, 200, 0);
    position: relative;
    overflow: hidden;
  }

  .btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -130%;
    width: 80%;
    height: 100%;
    background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .65), transparent);
    transform: skewX(-20deg);
    transition: left .6s var(--shift);
  }

  .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 30px rgba(94, 240, 200, .32);
  }

  .btn-primary:hover::after {
    left: 120%;
  }

  .btn-primary:active {
    transform: translateY(2px);
    box-shadow: none;
  }

  .btn-secondary {
    border-color: rgba(255, 255, 255, .16);
    background: rgba(255, 255, 255, .04);
    color: #D5E6F7;
  }

  .btn-secondary:hover {
    border-color: rgba(94, 240, 200, .45);
    color: #fff;
    background: rgba(94, 240, 200, .08);
  }

  .card-list-item {
    transition: background .25s var(--shift), border-color .25s var(--shift), transform .25s var(--shift);
  }

  .card-list-item:hover {
    background: rgba(255, 255, 255, .045);
    border-color: rgba(94, 240, 200, .2);
    transform: translateY(-2px);
  }

  .article-cms-content {
    color: #C6D7E8;
    font-size: 1.0625rem;
    line-height: 1.9;
  }

  .article-cms-content p {
    margin: 1.4rem 0;
  }

  .article-cms-content h2 {
    font-size: 1.45rem;
    line-height: 1.45;
    font-weight: 800;
    color: #FFFFFF;
    margin: 2.2rem 0 1rem;
    letter-spacing: -.01em;
  }

  .article-cms-content h3 {
    font-size: 1.15rem;
    line-height: 1.5;
    font-weight: 700;
    color: #EAF4FF;
    margin: 1.7rem 0 .85rem;
  }

  .article-cms-content a {
    color: #8AB8FF;
    border-bottom: 1px solid rgba(138, 184, 255, .35);
    transition: color .2s, border-color .2s;
  }

  .article-cms-content a:hover {
    color: var(--brand);
    border-color: rgba(94, 240, 200, .55);
  }

  .article-cms-content ul,
  .article-cms-content ol {
    margin: 1.2rem 0;
    padding-left: 1.4rem;
  }

  .article-cms-content li {
    margin: .35rem 0;
  }

  .article-cms-content blockquote {
    margin: 1.6rem 0;
    border-left: 3px solid var(--brand);
    background: rgba(94, 240, 200, .05);
    border-radius: 0 1rem 1rem 0;
    padding: .9rem 1.3rem;
    color: #9DB0C4;
  }

  .article-cms-content code {
    background: rgba(47, 123, 255, .1);
    color: #8FC0FF;
    padding: .15rem .4rem;
    border-radius: .3rem;
    font-size: .9em;
  }

  .article-cms-content pre {
    background: #081120;
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 1rem;
    padding: 1.2rem;
    overflow-x: auto;
    margin: 1.5rem 0;
  }

  .article-cms-content pre code {
    background: transparent;
    color: #C9E7FF;
    padding: 0;
  }

  .article-cms-content img {
    border-radius: 1.2rem;
    border: 1px solid rgba(255, 255, 255, .08);
    margin: 1.5rem 0;
  }

  .article-cms-content table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 1rem;
    overflow: hidden;
    margin: 1.5rem 0;
  }

  .article-cms-content th {
    background: rgba(47, 123, 255, .12);
    color: #EAF4FF;
    text-align: left;
    padding: .7rem 1rem;
    font-weight: 700;
  }

  .article-cms-content td {
    border-top: 1px solid rgba(255, 255, 255, .06);
    padding: .7rem 1rem;
    color: #B6C7DA;
  }

  .section-title {
    font-size: 2rem;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: #fff;
    font-weight: 800;
  }

  @media (max-width: 768px) {
    .section-title {
      font-size: 1.5rem;
    }
  }

  .section-lead {
    max-width: 40rem;
    color: var(--text-muted);
    font-size: .95rem;
    line-height: 1.8;
  }

  .footer-section {
    background: #04070C;
    border-top: 1px solid rgba(255, 255, 255, .05);
  }

  .float-cta {
    position: fixed;
    right: 1.15rem;
    bottom: 1.35rem;
    z-index: 80;
  }

  .float-cta-main {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, .15);
    background: linear-gradient(135deg, rgba(94, 240, 200, .18), rgba(47, 123, 255, .15));
    backdrop-filter: blur(14px);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 18px 40px rgba(0, 0, 0, .35);
    cursor: pointer;
    transition: transform .3s var(--shift), box-shadow .3s var(--shift);
  }

  .float-cta-main:hover {
    transform: translateY(-4px) scale(1.04);
    box-shadow: 0 0 36px rgba(94, 240, 200, .14);
  }

  .float-cta-menu {
    position: absolute;
    right: 0;
    bottom: 4.4rem;
    width: 13rem;
    border-radius: 1rem;
    background: linear-gradient(160deg, rgba(255, 255, 255, .1), rgba(255, 255, 255, .03));
    backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, .12);
    padding: .5rem;
    box-shadow: 0 24px 50px rgba(0, 0, 0, .35);
  }

  .float-cta-menu a {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .7rem .8rem;
    border-radius: .7rem;
    color: #D6E8F8;
    font-size: .875rem;
    font-weight: 600;
    transition: background .2s, color .2s;
  }

  .float-cta-menu a:hover {
    background: rgba(94, 240, 200, .1);
    color: #fff;
  }

  @media (max-width: 640px) {
    .float-cta {
      right: .6rem;
      bottom: .6rem;
    }

    .float-cta-menu {
      width: calc(100vw - 2rem);
      right: .4rem;
      bottom: 4.2rem;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: .35rem;
      padding: .6rem;
    }

    .float-cta-menu a {
      justify-content: center;
      text-align: center;
      padding: .75rem .5rem;
      font-size: .8rem;
      line-height: 1.3;
    }

    .float-cta-menu a svg {
      width: 18px;
      height: 18px;
      flex: none;
    }
  }

  .breadcrumb-active {
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  @keyframes arrow-light {
    from {
      transform: translateX(-4px);
      opacity: 0;
    }
    to {
      transform: translateX(2px);
      opacity: 1;
    }
  }

  .link-arrow:hover svg {
    animation: arrow-light .35s ease forwards;
  }

/* roulang page: category3 */
:root {
            --bg-deep: #04070C;
            --bg-base: #060B14;
            --bg-block: #0A1524;
            --bg-card: #0E1C30;
            --brand: #5EF0C8;
            --brand-soft: #8CF2D8;
            --primary: #2F7BFF;
            --text-main: #F2F7FF;
            --text-body: #B4C4D9;
            --text-muted: #8297B0;
            --line: rgba(255, 255, 255, 0.08);
            --line-bright: rgba(255, 255, 255, 0.14);
            --radius-lg: 1.25rem;
            --radius-md: 1rem;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg-base);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s, border-color .2s, background .2s;
        }

        button,
        input {
            font-family: inherit;
        }

        .container-x {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        @media (min-width: 768px) {
            .container-x {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: rgba(6, 11, 20, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-header .header-meta-row {
            transition: padding .3s;
        }

        .site-header.is-scrolled .header-meta-row {
            padding-top: .5rem;
            padding-bottom: .5rem;
        }

        .header-channel-row {
            background: rgba(6, 11, 20, 0.35);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .channel-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            white-space: nowrap;
            padding: .55rem 1rem;
            margin-right: .2rem;
            border-radius: 999px;
            font-size: .95rem;
            font-weight: 500;
            color: #B4C4D9;
            transition: color .2s, background .2s;
        }

        .channel-link:hover {
            color: #F2F7FF;
            background: rgba(255, 255, 255, 0.05);
        }

        .channel-link.is-current {
            color: #F2F7FF;
            background: rgba(94, 240, 200, 0.1);
        }

        .channel-link.is-current::after {
            content: "";
            display: inline-block;
            width: 5px;
            height: 5px;
            margin-left: .5rem;
            border-radius: 999px;
            background: #5EF0C8;
            box-shadow: 0 0 8px #5EF0C8;
        }

        .scrollbar-none::-webkit-scrollbar {
            display: none;
        }

        .scrollbar-none {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        .section-anchor {
            scroll-margin-top: 130px;
        }

        .card-panel {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.015));
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 1.5rem;
            backdrop-filter: blur(8px);
            transition: border-color .25s, transform .25s, box-shadow .25s;
        }

        .card-panel:hover {
            border-color: rgba(94, 240, 200, 0.22);
            transform: translateY(-2px);
            box-shadow: 0 18px 40px rgba(0, 0, 0, .18), 0 0 0 1px rgba(255, 255, 255, .02);
        }

        .glass-panel {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.025));
            border: 1px solid rgba(255, 255, 255, 0.09);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-radius: 1.75rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .6rem;
            padding: .78rem 1.4rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: .95rem;
            line-height: 1;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all .22s;
        }

        .btn-primary {
            color: #04121B;
            background: linear-gradient(135deg, #4BE3C0, #6EF5CE);
            box-shadow: 0 8px 22px rgba(94, 240, 200, 0.16);
            position: relative;
            overflow: hidden;
        }

        .btn-primary:hover {
            box-shadow: 0 10px 28px rgba(94, 240, 200, 0.28);
        }

        .btn-primary::before {
            content: "";
            position: absolute;
            top: 0;
            left: -80%;
            width: 45%;
            height: 100%;
            background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.55), transparent);
            transform: skewX(-18deg);
            transition: left .5s;
        }

        .btn-primary:hover::before {
            left: 120%;
        }

        .btn-outline {
            color: #DCE8FF;
            border-color: rgba(255, 255, 255, 0.14);
            background: rgba(255, 255, 255, 0.03);
        }

        .btn-outline:hover {
            border-color: rgba(94, 240, 200, 0.32);
            background: rgba(94, 240, 200, 0.08);
            color: #F2F7FF;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: .45rem;
            padding: .3rem .8rem;
            border-radius: 999px;
            font-size: .8rem;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.09);
            background: rgba(255, 255, 255, 0.03);
            color: #DCE8FF;
        }

        .badge-brand {
            color: var(--brand-soft);
            background: rgba(94, 240, 200, 0.09);
            border-color: rgba(94, 240, 200, 0.14);
        }

        .section-title {
            font-size: clamp(1.45rem, 2.6vw, 2.1rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
        }

        .section-desc {
            color: var(--text-body);
            font-size: 1rem;
            line-height: 1.8;
            max-width: 720px;
        }

        .text-muted {
            color: var(--text-muted);
        }

        .divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .12), transparent);
            border: 0;
            margin-top: 0;
            margin-bottom: 0;
        }

        .matrix-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0 8px;
            min-width: 720px;
        }

        .matrix-table th {
            text-align: left;
            font-size: .8rem;
            font-weight: 600;
            letter-spacing: .08em;
            color: #B8E6DC;
            padding: .7rem 1rem;
        }

        .matrix-table td {
            background: rgba(255, 255, 255, 0.028);
            border: 1px solid rgba(255, 255, 255, 0.06);
            padding: 1rem;
            font-size: .95rem;
            color: #B4C4D9;
        }

        .matrix-table tr td:first-child {
            border-radius: 1rem 0 0 1rem;
            color: #EAF4FF;
            font-weight: 600;
        }

        .matrix-table tr td:last-child {
            border-radius: 0 1rem 1rem 0;
        }

        .matrix-wrap {
            overflow-x: auto;
            background: rgba(6, 11, 20, 0.38);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: 1.5rem;
        }

        .empty-cover {
            position: relative;
            background: linear-gradient(140deg, #0E1C30, #0A1524 60%, #0b1e2f);
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 180px;
        }

        .empty-cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, .04) 0 1px, transparent 1px 14px);
        }

        .step-cover {
            border-radius: 1rem;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, .1);
            background: #0A1524;
            min-height: 110px;
            position: relative;
        }

        .footer-section {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, .05);
        }

        .footer-section h3 {
            font-size: .82rem;
            font-weight: 700;
            letter-spacing: .1em;
            color: #5C7090;
            text-transform: uppercase;
        }

        .footer-link {
            display: inline-flex;
            color: #8EABC4;
            transition: color .2s, transform .2s;
        }

        .footer-link:hover {
            color: var(--brand);
        }

        .tablet-pad {
            padding: 6rem 0;
        }

        @media (max-width: 1023px) {
            .tablet-pad {
                padding: 4.5rem 0;
            }
        }

        @media (max-width: 767px) {
            .container-x {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .tablet-pad {
                padding: 3.2rem 0;
            }
            .section-title {
                font-size: 1.55rem;
            }
            .section-desc {
                font-size: .95rem;
            }
        }

        @media (max-width: 480px) {
            .btn {
                padding: .7rem 1.15rem;
            }
            .channel-link {
                font-size: .88rem;
                padding: .5rem .8rem;
            }
        }

        :focus-visible {
            outline: 2px solid rgba(94, 240, 200, .65);
            outline-offset: 3px;
            border-radius: 8px;
        }

/* roulang page: category2 */
:root {
  --bg: #060B14;
  --panel: #0A1524;
  --surface: #0E1C30;
  --brand: #5EF0C8;
  --brand-deep: #2F7BFF;
  --line: rgba(255, 255, 255, 0.07);
  --muted: #94A3B8;
  --soft: #E2E8F0;
  --radius: 1.25rem;
  --shadow-soft: 0 18px 50px -30px rgba(0, 0, 0, 0.75);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--soft);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 12px;
}
img {
  display: block;
  max-width: 100%;
}
.container-x {
  max-width: 80rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}
@media (min-width: 640px) {
  .container-x {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}
.section-pad {
  padding-top: 4.5rem;
  padding-bottom: 4.5rem;
}
@media (min-width: 768px) {
  .section-pad {
    padding-top: 5.5rem;
    padding-bottom: 5.5rem;
  }
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
}
.header-meta-row {
  background: rgba(6, 11, 20, 0.88);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.header-channel-row {
  background: rgba(6, 11, 20, 0.72);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.scrollbar-none {
  scrollbar-width: none;
}
.scrollbar-none::-webkit-scrollbar {
  display: none;
}
.channel-link {
  position: relative;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.85rem;
  border-radius: 0.85rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: #94A3B8;
  transition: color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}
.channel-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}
.channel-link.active {
  color: #fff;
}
.channel-link.active::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.28rem;
  height: 2px;
  border-radius: 999px;
  background: var(--brand);
  box-shadow: 0 0 10px rgba(94, 240, 200, 0.55);
}
.channel-dot {
  width: 5px;
  height: 5px;
  border-radius: 999px;
  background: #334155;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}
.channel-link.active .channel-dot {
  background: var(--brand);
  box-shadow: 0 0 9px rgba(94, 240, 200, 0.9);
}
.text-brand {
  color: var(--brand);
}
.text-blue-accent {
  color: var(--brand-deep);
}
.bg-brand {
  background-color: var(--brand);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.3rem;
  border-radius: 0.85rem;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.btn-primary {
  background: var(--brand);
  color: #04140F;
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 10px 30px -14px rgba(94, 240, 200, 0.65);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px -12px rgba(94, 240, 200, 0.72);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: #cbd5e1;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}
.glass-panel {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.02));
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 1.75rem;
}
.badge-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  background: rgba(94, 240, 200, 0.1);
  border: 1px solid rgba(94, 240, 200, 0.22);
  color: var(--brand);
  font-size: 0.8rem;
  font-weight: 600;
}
.badge-soft {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: rgba(47, 123, 255, 0.12);
  border: 1px solid rgba(47, 123, 255, 0.2);
  color: #a5c7ff;
  font-size: 0.75rem;
  font-weight: 600;
}
.section-title {
  color: #fff;
  font-size: clamp(1.65rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.section-desc {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 620px;
}
.grid-pattern {
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 42px 42px;
}
.hero-glow {
  background: radial-gradient(680px at 80% -10%, rgba(47, 123, 255, 0.16), transparent 62%);
}
.content-card {
  position: relative;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
  overflow: hidden;
}
.content-card:hover {
  border-color: rgba(94, 240, 200, 0.3);
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 16px 40px -28px rgba(94, 240, 200, 0.14);
}
.card-index {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 0.85rem;
  background: rgba(47, 123, 255, 0.12);
  border: 1px solid rgba(47, 123, 255, 0.16);
  color: #9cc2ff;
  font-size: 0.9rem;
  font-weight: 700;
}
.card-tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  background: rgba(94, 240, 200, 0.08);
  border: 1px solid rgba(94, 240, 200, 0.16);
  color: var(--brand);
  font-size: 0.75rem;
  font-weight: 600;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: #8ab8ff;
  transition: color 0.2s ease, gap 0.2s ease;
}
.card-link:hover {
  color: var(--brand);
  gap: 0.5rem;
}
.deep-panel {
  background: linear-gradient(180deg, rgba(14, 28, 48, 0.74), rgba(10, 21, 36, 0.62));
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 1.6rem;
}
.step-line {
  border: 1px dashed rgba(94, 240, 200, 0.24);
}
.dot-pulse {
  position: relative;
  display: inline-flex;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--brand);
}
.dot-pulse::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 999px;
  border: 1px solid rgba(94, 240, 200, 0.35);
  animation: pulse-ring 1.8s ease-out infinite;
}
@keyframes pulse-ring {
  0% {
    transform: scale(0.55);
    opacity: 1;
  }
  80%,
  100% {
    transform: scale(1.45);
    opacity: 0;
  }
}
.faq-item {
  background: rgba(10, 21, 36, 0.52);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1rem;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.faq-item[open] {
  border-color: rgba(94, 240, 200, 0.28);
  background: rgba(14, 28, 48, 0.6);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 1.1rem 1.25rem;
  font-weight: 600;
  color: #e6f4ff;
  line-height: 1.5;
  -webkit-user-select: none;
  user-select: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
  background: rgba(94, 240, 200, 0.06);
  border: 1px solid rgba(94, 240, 200, 0.2);
  color: var(--brand);
  font-size: 1.2rem;
  transition: transform 0.25s ease, background-color 0.2s ease, border-color 0.2s ease;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
  background: rgba(94, 240, 200, 0.14);
}
.faq-answer {
  padding: 0.1rem 1.25rem 1.2rem 1.25rem;
  border-top: 1px dashed rgba(255, 255, 255, 0.09);
  margin-top: -0.35rem;
  color: #aebace;
  line-height: 1.85;
  font-size: 0.95rem;
}
.footer-section {
  background: #04070C;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}
.footer-title {
  color: #64748B;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.footer-link {
  color: #94A3B8;
  transition: color 0.2s ease;
}
.footer-link:hover {
  color: var(--brand);
}
.float-cta {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 80;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 10px;
}
.float-cta__menu {
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}
.float-cta.open .float-cta__menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.float-cta__toggle {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 1rem;
  border: 1px solid rgba(94, 240, 200, 0.25);
  background: linear-gradient(135deg, rgba(94, 240, 200, 0.15), rgba(47, 123, 255, 0.12));
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 18px 40px -20px rgba(6, 11, 20, 0.9), 0 0 0 1px rgba(255, 255, 255, 0.06) inset;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.float-cta__toggle:hover {
  transform: translateY(-2px);
  border-color: rgba(94, 240, 200, 0.65);
  box-shadow: 0 12px 36px -12px rgba(94, 240, 200, 0.45);
}
.float-cta__toggle svg {
  width: 24px;
  height: 24px;
}
.float-cta__menu {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.02));
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: 0 18px 44px -18px rgba(0, 0, 0, 0.8);
}
.float-cta__link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1rem;
  color: #cbd5e1;
  font-size: 0.88rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease;
}
.float-cta__link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}
.float-cta__link svg {
  width: 17px;
  height: 17px;
  color: var(--brand);
}
@media (max-width: 640px) {
  .float-cta {
    right: 12px;
    bottom: 14px;
  }
  .float-cta__toggle {
    width: 3.2rem;
    height: 3.2rem;
    border-radius: 0.9rem;
  }
}

/* roulang page: category4 */
:root {
    --bg-base: #060B14;
    --bg-panel: #0A1524;
    --bg-surface: #0E1C30;
    --brand: #5EF0C8;
    --brand-soft: #8BF7DC;
    --accent: #2F7BFF;
    --text-high: #F1F7FF;
    --text-body: #B7C4D6;
    --text-mute: #718096;
    --border-white: rgba(255, 255, 255, .08);
    --radius-lg: 1.25rem;
    --radius-xl: 1.75rem;
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background: var(--bg-base);
    color: var(--text-body);
    font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  ::selection {
    background: rgba(94, 240, 200, .2);
    color: #fff;
  }

  img {
    max-width: 100%;
    display: block;
  }

  a {
    text-decoration: none;
    transition: color .25s ease, background-color .25s ease, border-color .25s ease, opacity .25s ease;
  }

  button,
  input,
  textarea {
    font-family: inherit;
  }

  .container-x {
    width: 100%;
    max-width: 1280px;
    margin-inline: auto;
    padding-inline: 1.25rem;
  }

  .section-space {
    padding-top: 5.5rem;
    padding-bottom: 5.5rem;
  }

  @media (min-width: 768px) {
    .section-space {
      padding-top: 6.5rem;
      padding-bottom: 6.5rem;
    }
  }

  .scrollbar-none {
    -ms-overflow-style: none;
    scrollbar-width: none;
  }
  .scrollbar-none::-webkit-scrollbar {
    display: none;
  }

  /* 双行导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(6, 11, 20, .72);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: background .35s ease, border-color .35s ease, box-shadow .35s ease;
  }

  .site-header.scrolled {
    background: rgba(4, 8, 14, .92);
    box-shadow: 0 20px 50px rgba(0, 0, 0, .38);
    border-color: rgba(255, 255, 255, .04);
  }

  .site-header.scrolled .header-meta-row {
    display: none;
  }

  .site-header.scrolled .header-channel-row {
    border-top: none;
    background: transparent;
  }

  .mini-logo-inline {
    display: none;
  }

  .site-header.scrolled .mini-logo-inline {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    margin-right: .45rem;
    padding-right: .75rem;
    border-right: 1px solid rgba(255, 255, 255, .08);
  }

  .channel-link {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    height: 40px;
    padding: 0 .85rem;
    border-radius: 999px;
    font-size: .9rem;
    font-weight: 500;
    color: #96A7BC;
    white-space: nowrap;
    position: relative;
    transition: color .2s ease, background-color .2s ease;
  }

  .channel-link:hover {
    color: #D9E8FF;
    background: rgba(255, 255, 255, .04);
  }

  .channel-link.active {
    color: var(--brand);
    background: rgba(94, 240, 200, .06);
  }

  .channel-link.active::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--brand);
    box-shadow: 0 0 10px rgba(94, 240, 200, .9);
  }

  .channel-link.active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 1px;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    border-radius: 99px;
    background: var(--brand);
    box-shadow: 0 0 8px rgba(94, 240, 200, .6);
  }

  /* 玻璃面板但限制使用，不是全站每块 */
  .glass-panel {
    background: linear-gradient(135deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .025));
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, .1);
  }

  .card-panel {
    background: rgba(14, 28, 48, .7);
    border: 1px solid rgba(255, 255, 255, .09);
    border-radius: var(--radius-lg);
    transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease, background .3s ease;
  }

  .card-panel:hover {
    border-color: rgba(255, 255, 255, .17);
    transform: translateY(-4px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, .35), 0 0 0 1px rgba(255, 255, 255, .04);
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .6rem;
    border-radius: 1rem;
    font-weight: 700;
    font-size: .95rem;
    line-height: 1;
    padding: .9rem 1.35rem;
    transition: all .25s ease;
    cursor: pointer;
    border: 1px solid transparent;
  }

  .btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 10px 24px rgba(47, 123, 255, .28);
  }
  .btn-primary:hover {
    background: #4E96FF;
    box-shadow: 0 10px 30px rgba(47, 123, 255, .42);
    transform: translateY(-1px);
  }
  .btn-primary:focus-visible {
    outline: 3px solid rgba(94, 240, 200, .55);
    outline-offset: 2px;
  }

  .btn-ghost {
    background: rgba(255, 255, 255, .04);
    border-color: rgba(255, 255, 255, .14);
    color: #DFEAF5;
  }
  .btn-ghost:hover {
    background: rgba(255, 255, 255, .08);
    border-color: rgba(255, 255, 255, .24);
    color: #fff;
  }
  .btn-ghost:focus-visible {
    outline: 3px solid rgba(94, 240, 200, .45);
    outline-offset: 2px;
  }

  .btn-scan {
    position: relative;
    overflow: hidden;
  }

  .btn-scan::after {
    content: "";
    position: absolute;
    top: 0;
    left: 120%;
    width: 55%;
    height: 100%;
    transform: skewX(-20deg);
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .55), transparent);
    transition: left .6s ease;
  }

  .btn-scan:hover::after {
    left: -60%;
  }

  .tag {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, .05);
    border: 1px solid rgba(255, 255, 255, .1);
    color: #C4D2E2;
    font-size: .75rem;
    font-weight: 600;
    padding: .28rem .72rem;
    letter-spacing: .02em;
  }

  .tag-brand {
    color: #0A1C13;
    background: var(--brand);
    border-color: transparent;
  }

  .meta-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--brand);
    box-shadow: 0 0 10px rgba(94, 240, 200, .85);
    display: inline-block;
  }

  .edge-line {
    background-image: linear-gradient(120deg, rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(0deg, rgba(255,255,255,.04) 1px, transparent 1px);
    background-size: 44px 44px;
  }

  .soft-glow {
    box-shadow: 0 0 0 1px rgba(255,255,255,.08), 0 18px 44px rgba(0,0,0,.35);
  }

  /* 分类频道专题头 */
  .category-header {
    background:
      linear-gradient(105deg, rgba(6, 11, 20, .96) 0%, rgba(6, 11, 20, .82) 45%, rgba(6, 11, 20, .45) 100%),
      url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid rgba(255, 255, 255, .06);
  }

  .category-header:after {
    content: "";
    position: absolute;
    width: 300px;
    height: 300px;
    right: -80px;
    bottom: -150px;
    border: 1px solid rgba(94, 240, 200, .14);
    border-radius: 50%;
    box-shadow: 0 0 80px rgba(94, 240, 200, .05);
  }

  .hero-h1 {
    font-size: clamp(1.9rem, 4.4vw, 3rem);
    line-height: 1.22;
    letter-spacing: -0.035em;
  }

  /* FAQ */
  .faq-item {
    border: 1px solid rgba(255, 255, 255, .09);
    border-radius: 1.2rem;
    background: rgba(10, 21, 36, .85);
    transition: border-color .25s ease, background .25s ease;
    margin-bottom: .9rem;
  }

  .faq-item:hover {
    border-left: 3px solid rgba(94, 240, 200, .5);
    background: rgba(12, 25, 44, .95);
  }

  .faq-item summary {
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 1.25rem;
    font-weight: 700;
    cursor: pointer;
    color: #EDF5FF;
  }

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

  .faq-item summary .faq-icon {
    width: 32px;
    height: 32px;
    flex: 0 0 32px;
    border-radius: 10px;
    background: rgba(255, 255, 255, .06);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--brand);
    transition: all .3s ease;
  }

  .faq-item[open] summary .faq-icon {
    transform: rotate(45deg);
    background: rgba(94, 240, 200, .12);
    color: var(--brand);
  }

  .faq-body {
    padding: 0 1.35rem 1.35rem 1.25rem;
    color: #a8b9d0;
    line-height: 1.85;
    font-size: .93rem;
  }

  /* 浮动 CTA */
  .float-cta-wrap {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 80;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: .85rem;
  }

  .float-cta-wrap.open .float-menu {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .float-main-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--brand);
    color: #051008;
    border: none;
    box-shadow: 0 0 0 5px rgba(94, 240, 200, .16), 0 12px 26px rgba(94, 240, 200, .28);
    transition: transform .3s ease, box-shadow .3s ease;
  }

  .float-main-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 0 8px rgba(94, 240, 200, .18), 0 18px 34px rgba(94, 240, 200, .33);
  }

  .float-menu {
    width: 235px;
    border-radius: 1.4rem;
    background: rgba(10, 18, 30, .9);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, .1);
    padding: .6rem;
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
    transition: all .3s ease;
  }

  .float-menu a,
  .float-menu button {
    display: flex;
    align-items: center;
    gap: .75rem;
    width: 100%;
    text-align: left;
    padding: .65rem .8rem;
    border-radius: .7rem;
    font-size: .87rem;
    font-weight: 600;
    color: #D7E1F0;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: background .25s ease, color .25s ease;
  }

  .float-menu a:hover,
  .float-menu button:hover {
    background: rgba(94, 240, 200, .08);
    color: var(--brand);
  }

  @media (max-width: 640px) {
    .float-cta-wrap {
      left: 10px;
      right: auto;
      bottom: 10px;
      width: auto;
    }
    .float-main-btn {
      width: 52px;
      height: 52px;
    }
    .float-menu {
      width: min(230px, 75vw);
      background: rgba(6, 11, 20, .94);
    }
  }