/* roulang page: index */
:root {
    --color-primary: #6C4DF6;
    --color-primary-dark: #4B2FD3;
    --color-accent: #F97316;
    --color-accent-light: #FB923C;
    --color-success: #10B981;
    --color-bg: #FAF9F7;
    --color-surface: #ffffff;
    --color-ink: #1A1A2E;
    --color-muted: #6B7280;
    --card-radius: 1.25rem;
    --btn-radius: 9999px;
    --shadow-card: 0 4px 12px rgba(26, 26, 46, .08);
    --shadow-hover: 0 12px 28px rgba(108, 77, 246, .18);
  }

  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background: var(--color-bg);
    color: var(--color-ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

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

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

  button,
  input {
    font-family: inherit;
    outline: none;
  }

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

  .card-hover {
    transition: box-shadow .3s ease, transform .3s ease;
  }
  .card-hover:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
  }
  .faq-item.active .faq-answer {
    max-height: 320px;
  }
  .faq-icon {
    transition: transform .3s ease;
  }
  .faq-item.active .faq-icon {
    transform: rotate(45deg);
  }

  .carousel-slide {
    display: none;
  }
  .carousel-slide.active {
    display: block;
  }

  .grad-text {
    background: linear-gradient(135deg, #6C4DF6, #F97316);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero-bg-deco {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: .45;
    pointer-events: none;
  }

  .nav-tab-active {
    background: linear-gradient(135deg, #6C4DF6, #F97316);
    color: #fff;
  }

  .cta-banner {
    background: #1A1A2E;
    position: relative;
    overflow: hidden;
  }
  .cta-banner::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -60px;
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(108, 77, 246, .35), rgba(249, 115, 22, .3));
    border-radius: 50%;
    filter: blur(60px);
  }
  .cta-banner::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: 20%;
    width: 260px;
    height: 260px;
    background: rgba(108, 77, 246, .25);
    border-radius: 50%;
    filter: blur(70px);
  }

  .img-fallback {
    background: linear-gradient(135deg, #E9E5FF, #FFE5D6);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 160px;
    color: #8B7CB8;
    font-weight: 600;
  }

  .float-anim {
    animation: float 5s ease-in-out infinite;
  }
  @keyframes float {
    0%,
    100% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(-12px);
    }
  }

  .step-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .3);
    border: none;
    cursor: pointer;
    transition: background .3s;
  }
  .step-dot.active {
    background: #F97316;
  }

  .rating-star {
    color: #F59E0B;
  }

  @media (max-width: 640px) {
    .hero-title {
      font-size: 2.25rem !important;
      line-height: 1.2 !important;
    }
    .cta-group {
      flex-direction: column;
      width: 100%;
    }
    .cta-group a {
      width: 100%;
      justify-content: center;
    }
  }

/* roulang page: article */
:root {
            --brand: #6C4DF6;
            --brand-dark: #4B2FD3;
            --accent: #F97316;
            --accent-light: #FB923C;
            --success: #10B981;
            --bg: #FAF9F7;
            --surface: #FFFFFF;
            --ink: #1A1A2E;
            --muted: #6B7280;
            --border: #E5E7EB;
            --card-radius: 1.25rem;
            --btn-radius: 9999px;
            --shadow-card: 0 4px 12px rgba(26, 26, 46, .08);
            --shadow-hover: 0 12px 28px rgba(108, 77, 246, .18);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            background: var(--bg);
            color: var(--ink);
            line-height: 1.6;
            font-size: 16px;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

        button,
        input {
            font-family: inherit;
        }

        .container-site {
            max-width: 80rem;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 768px) {
            .container-site {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container-site {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

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

        .grad-bg {
            background: linear-gradient(135deg, #6C4DF6 0%, #F97316 100%);
        }

        .grad-text {
            background: linear-gradient(135deg, #6C4DF6, #F97316);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: linear-gradient(135deg, #6C4DF6, #F97316);
            color: #fff;
            border-radius: var(--btn-radius);
            padding: .75rem 1.75rem;
            font-weight: 600;
            font-size: .9375rem;
            border: none;
            cursor: pointer;
            transition: all .25s ease;
            box-shadow: 0 4px 14px rgba(108, 77, 246, .25);
        }

        .btn-primary:hover {
            transform: scale(1.04);
            filter: brightness(1.08);
            box-shadow: 0 8px 22px rgba(108, 77, 246, .32);
        }

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

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: transparent;
            color: var(--ink);
            border: 2px solid #E5E7EB;
            border-radius: var(--btn-radius);
            padding: .7rem 1.6rem;
            font-weight: 600;
            font-size: .9375rem;
            cursor: pointer;
            transition: all .25s ease;
        }

        .btn-outline:hover {
            border-color: var(--brand);
            background: rgba(108, 77, 246, .05);
            color: var(--brand);
        }

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

        .nav-tab-active {
            background: linear-gradient(135deg, #6C4DF6, #F97316);
            color: #fff !important;
            box-shadow: 0 4px 12px rgba(108, 77, 246, .28);
        }

        .card-hover {
            transition: all .3s ease;
            box-shadow: var(--shadow-card);
        }

        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .badge-num {
            font-family: "DIN Alternate", "Oswald", "Bahnschrift", sans-serif;
            font-weight: 700;
            letter-spacing: .5px;
        }

        .article-content {
            font-size: 1.0625rem;
            line-height: 1.9;
            color: #374151;
        }

        .article-content p {
            margin-bottom: 1.6em;
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--ink);
            margin-top: 2em;
            margin-bottom: .8em;
            line-height: 1.35;
        }

        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--ink);
            margin-top: 1.8em;
            margin-bottom: .6em;
        }

        .article-content ul {
            margin: 0 0 1.6em 1.2em;
            list-style: disc;
        }

        .article-content ol {
            margin: 0 0 1.6em 1.4em;
            list-style: decimal;
        }

        .article-content li {
            margin-bottom: .4em;
        }

        .article-content blockquote {
            border-left: 4px solid var(--brand);
            background: #F6F4FF;
            padding: 1rem 1.25rem;
            border-radius: 0 .75rem .75rem 0;
            margin: 0 0 1.6em;
            color: #4B5563;
            font-style: normal;
        }

        .article-content code {
            background: #F3F4F6;
            border-radius: .375rem;
            padding: .2rem .45rem;
            font-size: .9em;
            color: #BE185D;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
        }

        .article-content pre {
            background: #1A1A2E;
            color: #E5E7EB;
            border-radius: 1rem;
            padding: 1.25rem 1.5rem;
            overflow-x: auto;
            margin: 0 0 1.6em;
            line-height: 1.6;
            font-size: .9rem;
        }

        .article-content pre code {
            background: transparent;
            color: inherit;
            padding: 0;
        }

        .article-content img {
            border-radius: 1rem;
            margin: 1.5em 0;
        }

        .article-content a {
            color: var(--brand);
            font-weight: 500;
            border-bottom: 1px solid rgba(108, 77, 246, .3);
            transition: border-color .2s;
        }

        .article-content a:hover {
            border-color: var(--brand);
        }

        .bcrumb {
            font-size: .875rem;
            color: var(--muted);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: .4rem;
        }

        .bcrumb a:hover {
            color: var(--brand);
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: .3rem;
            background: #F0ECFF;
            color: var(--brand);
            border-radius: 9999px;
            padding: .3rem .9rem;
            font-size: .8125rem;
            font-weight: 500;
            transition: all .2s;
        }

        .tag-pill:hover {
            background: var(--brand);
            color: #fff;
        }

        .cta-banner {
            background: linear-gradient(135deg, #1A1A2E 0%, #2D2A4A 100%);
            border-radius: 2rem;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(108, 77, 246, .35), transparent 70%);
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -50%;
            left: -5%;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(249, 115, 22, .3), transparent 70%);
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 1rem;
            background: #fff;
            transition: box-shadow .25s ease;
        }

        .faq-item:hover {
            box-shadow: 0 4px 16px rgba(26, 26, 46, .06);
        }

        .faq-item details {
            padding: 1.1rem 1.25rem;
        }

        .faq-item summary {
            cursor: pointer;
            font-weight: 600;
            font-size: .9375rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
            outline: none;
        }

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

        .faq-item summary i {
            transition: transform .3s;
            color: var(--brand);
            font-size: .875rem;
        }

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

        .faq-item .faq-answer {
            margin-top: .75rem;
            color: var(--muted);
            font-size: .875rem;
            line-height: 1.75;
        }

        .footer-link {
            transition: color .2s;
        }

        .footer-link:hover {
            color: #fff !important;
        }

        .mobile-menu {
            display: none;
        }

        .mobile-menu.open {
            display: block;
        }

        @media (max-width: 767px) {
            .desktop-search {
                display: none;
            }
            .desktop-cta {
                display: none;
            }
        }

        @media (min-width: 768px) {
            .mobile-toggle {
                display: none;
            }
        }

/* roulang page: category1 */
:root {
  --color-primary: #6C4DF6;
  --color-primary-dark: #4B2FD3;
  --color-accent: #F97316;
  --color-accent-light: #FB923C;
  --color-bg: #FAF9F7;
  --color-surface: #FFFFFF;
  --color-ink: #1A1A2E;
  --color-muted: #6B7280;
  --card-radius: 1.25rem;
  --btn-radius: 9999px;
  --shadow-card: 0 4px 12px rgba(26,26,46,.08);
  --shadow-hover: 0 12px 28px rgba(108,77,246,.18);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.6;
}
.grad-text {
  background: linear-gradient(135deg, #6C4DF6, #F97316);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.scrollbar-hide::-webkit-scrollbar { display: none; }
.scrollbar-hide { -ms-overflow-style: none; scrollbar-width: none; }
.shadow-card { box-shadow: var(--shadow-card); }
.shadow-hover { transition: all .3s ease; }
.shadow-hover:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.nav-tab-active {
  background: linear-gradient(135deg, #6C4DF6, #F97316);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(108,77,246,.25);
}
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .35rem .9rem;
  border-radius: 9999px;
  font-size: .8rem;
  font-weight: 500;
  background: #F0ECFF;
  color: #4B2FD3;
}
.badge-pill-orange {
  background: #FFF3E8;
  color: #C2590A;
}
.btn-gradient {
  background: linear-gradient(135deg, #6C4DF6, #F97316);
  color: #fff;
  border-radius: 9999px;
  padding: .85rem 2rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  transition: all .3s ease;
  box-shadow: 0 4px 14px rgba(108,77,246,.28);
  border: none;
  cursor: pointer;
}
.btn-gradient:hover {
  transform: scale(1.04);
  filter: brightness(1.1);
  box-shadow: 0 8px 26px rgba(108,77,246,.38);
}
.btn-gradient:focus {
  outline: none;
  ring: 2px solid #6C4DF6;
  ring-offset: 2px;
}
.btn-outline {
  border: 2px solid #6C4DF6;
  color: #6C4DF6;
  border-radius: 9999px;
  padding: .75rem 1.8rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  transition: all .3s ease;
  background: transparent;
}
.btn-outline:hover {
  background: rgba(108,77,246,.06);
  border-color: #4B2FD3;
  color: #4B2FD3;
}
.btn-outline-light {
  border: 2px solid rgba(255,255,255,.7);
  color: #fff;
  border-radius: 9999px;
  padding: .75rem 1.8rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  transition: all .3s ease;
  background: transparent;
}
.btn-outline-light:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
}
.faq-item { transition: box-shadow .3s ease; }
.faq-item:hover { box-shadow: var(--shadow-hover); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-item.open .faq-answer { max-height: 420px; }
.faq-icon { transition: transform .3s ease; }
.faq-item.open .faq-icon { transform: rotate(45deg); color: #F97316; }
.step-line { position: relative; }
.step-line::before {
  content: '';
  position: absolute;
  top: 48px;
  left: 24px;
  width: 1px;
  height: calc(100% - 40px);
  background: linear-gradient(to bottom, #6C4DF6, #F97316);
  opacity: .25;
}
.step-line:last-child::before { display: none; }
.platform-card { transition: all .3s ease; }
.platform-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
  border-color: #6C4DF6;
}
.download-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  background: linear-gradient(135deg, #F0ECFF, #FFF3E8);
  color: #6C4DF6;
}
.cta-banner {
  background: linear-gradient(135deg, #1A1A2E 0%, #2D2168 60%, #6C4DF6 100%);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -60%;
  right: -15%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(249,115,22,.25), transparent 70%);
}
.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108,77,246,.35), transparent 70%);
}
.hero-card {
  position: relative;
  overflow: hidden;
}
.hero-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 100%;
  background: linear-gradient(135deg, transparent 40%, rgba(249,115,22,.12) 60%, rgba(108,77,246,.15) 100%);
  pointer-events: none;
}
@media (max-width: 768px) {
  .hero-card::after { width: 100%; opacity: .3; }
}

/* roulang page: category2 */
:root {
    --brand: #6C4DF6;
    --brand-dark: #4B2FD3;
    --accent: #F97316;
    --accent-light: #FB923C;
    --success: #10B981;
    --bg: #FAF9F7;
    --surface: #FFFFFF;
    --ink: #1A1A2E;
    --muted: #6B7280;
    --border: #E5E7EB;
    --card-radius: 1.25rem;
    --btn-radius: 9999px;
    --shadow-card: 0 4px 12px rgba(26, 26, 46, .08);
    --shadow-hover: 0 12px 28px rgba(108, 77, 246, .18);
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    margin: 0;
  }
  a { text-decoration: none; color: inherit; }
  img { max-width: 100%; display: block; }
  button { font-family: inherit; cursor: pointer; }
  input { font-family: inherit; }

  .grad-text {
    background: linear-gradient(120deg, var(--brand), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .75rem 1.75rem;
    border-radius: 9999px;
    background: linear-gradient(135deg, var(--brand), var(--accent));
    color: #fff;
    font-weight: 600;
    font-size: .9rem;
    box-shadow: var(--shadow-card);
    transition: all .25s ease;
    border: none;
    line-height: 1.4;
  }
  .btn-primary:hover { filter: brightness(1.1); transform: scale(1.03); box-shadow: var(--shadow-hover); }
  .btn-primary:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .75rem 1.75rem;
    border-radius: 9999px;
    border: 2px solid var(--brand);
    color: var(--brand);
    font-weight: 600;
    font-size: .9rem;
    background: transparent;
    transition: all .25s ease;
    line-height: 1.4;
  }
  .btn-outline:hover { background: rgba(108, 77, 246, .05); transform: translateY(-2px); }
  .btn-outline:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

  .btn-accent {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .8rem 2rem;
    border-radius: 9999px;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    font-size: .9rem;
    transition: all .25s ease;
    border: none;
    line-height: 1.4;
  }
  .btn-accent:hover { filter: brightness(1.08); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(249, 115, 22, .3); }

  .btn-outline-light {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    padding: .8rem 2rem;
    border-radius: 9999px;
    border: 2px solid rgba(255, 255, 255, .35);
    color: #fff;
    font-weight: 600;
    font-size: .9rem;
    background: transparent;
    transition: all .25s ease;
    line-height: 1.4;
  }
  .btn-outline-light:hover { background: rgba(255, 255, 255, .08); transform: translateY(-2px); }
  .btn-outline-light:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }

  .card {
    background: var(--surface);
    border-radius: 1.5rem;
    box-shadow: var(--shadow-card);
    transition: all .3s ease;
    display: block;
  }
  .card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
  .card:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

  .section-tag {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .35rem 1rem;
    border-radius: 9999px;
    background: #F0ECFF;
    color: var(--brand);
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .05em;
  }
  .section-title { margin-top: .75rem; font-size: 1.75rem; font-weight: 800; line-height: 1.25; color: var(--ink); }
  @media (min-width: 768px) { .section-title { font-size: 2rem; } }

  .nav-tab-active {
    background: linear-gradient(135deg, var(--brand), var(--accent));
    color: #fff;
    box-shadow: var(--shadow-card);
  }
  .nav-tab-active:hover { color: #fff; }

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

  .badge-item {
    background: #F0ECFF;
    border-radius: 1.25rem;
    padding: 1.25rem 1.75rem;
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: transform .3s ease, box-shadow .3s ease;
    min-width: 150px;
  }
  .badge-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
  .badge-item .num {
    font-family: "DIN Alternate", "Oswald", "Bahnschrift", sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--brand);
    line-height: 1.2;
  }
  .badge-item .label { font-size: .8rem; color: var(--muted); margin-top: .25rem; }
  .badge-item.accent { background: #FFF3E8; }
  .badge-item.accent .num { color: var(--accent); }
  .badge-item.green { background: #E7F9F1; }
  .badge-item.green .num { color: var(--success); }
  .badge-item.dark { background: #EDEDF5; }
  .badge-item.dark .num { color: var(--ink); }

  .stagger-row > *:nth-child(2), .stagger-row > *:nth-child(4) { transform: translateY(8px); }
  .stagger-row > *:nth-child(3) { transform: translateY(12px); }

  .step-num {
    flex-shrink: 0;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 9999px;
    background: linear-gradient(135deg, var(--brand), var(--accent));
    color: #fff;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: .95rem;
    box-shadow: 0 6px 14px rgba(108, 77, 246, .25);
  }

  .platform-btn {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1.5rem;
    border-radius: 9999px;
    background: #F5F5F7;
    color: var(--muted);
    font-weight: 600;
    font-size: .9rem;
    transition: all .25s ease;
    border: 1px solid transparent;
    width: 100%;
    text-align: left;
  }
  .platform-btn:hover { background: #F0ECFF; color: var(--brand); }
  .platform-btn.active {
    background: linear-gradient(135deg, var(--brand), var(--accent));
    color: #fff;
    box-shadow: var(--shadow-card);
  }

  .req-row {
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    padding: 1rem 1.25rem;
    background: #FAF9F7;
    border-radius: 1rem;
    font-size: .9rem;
    color: var(--ink);
    border: 1px solid rgba(0, 0, 0, .02);
    transition: background .25s ease;
  }
  .req-row:hover { background: #F0ECFF; }
  .req-row i { color: var(--success); margin-top: .2rem; }

  .faq-item {
    border: 1px solid var(--border);
    border-radius: 1.25rem;
    background: #fff;
    overflow: hidden;
    transition: box-shadow .3s ease;
  }
  .faq-item:hover { box-shadow: var(--shadow-card); }
  .faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    color: var(--ink);
    cursor: pointer;
    list-style: none;
    transition: color .25s ease;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary::after {
    content: '+';
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    border-radius: 9999px;
    background: #F0ECFF;
    color: var(--brand);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    transition: transform .3s ease, background .3s ease, color .3s ease;
  }
  .faq-item[open] summary::after {
    transform: rotate(45deg);
    background: linear-gradient(135deg, var(--brand), var(--accent));
    color: #fff;
  }
  .faq-item .faq-body { padding: 0 1.5rem 1.5rem; color: var(--muted); font-size: .9rem; line-height: 1.7; }

  .hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    opacity: .14;
    pointer-events: none;
  }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
  :root {
    --color-primary: #6C4DF6;
    --color-primary-dark: #4B2FD3;
    --color-accent: #F97316;
    --color-accent-light: #FB923C;
    --color-success: #10B981;
    --color-bg: #FAF9F7;
    --color-surface: #FFFFFF;
    --color-ink: #1A1A2E;
    --color-muted: #6B7280;
    --card-radius: 1.25rem;
    --btn-radius: 9999px;
    --shadow-card: 0 4px 12px rgba(26, 26, 46, .08);
    --shadow-hover: 0 12px 28px rgba(108, 77, 246, .18);
  }

  /* ===== 基础重置 ===== */
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background-color: var(--color-bg);
    color: var(--color-ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; display: block; }
  a { text-decoration: none; color: inherit; }
  button { font-family: inherit; }
  input { font-family: inherit; }

  /* ===== 工具类 ===== */
  .scrollbar-hide::-webkit-scrollbar { display: none; }
  .scrollbar-hide { -ms-overflow-style: none; scrollbar-width: none; }
  .grad-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }
  .line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* ===== 导航 ===== */
  .nav-tab-active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: #fff !important;
    box-shadow: 0 4px 12px rgba(108, 77, 246, .25);
  }

  /* ===== 卡片 ===== */
  .card {
    background: var(--color-surface);
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-card);
    transition: all .3s ease;
    overflow: hidden;
  }
  .card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
  }

  /* ===== 按钮 ===== */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: #fff;
    font-weight: 600;
    border: none;
    border-radius: var(--btn-radius);
    padding: .75rem 1.5rem;
    font-size: .875rem;
    cursor: pointer;
    transition: all .3s ease;
  }
  .btn-primary:hover {
    filter: brightness(1.1);
    transform: scale(1.03);
    box-shadow: 0 8px 20px rgba(108, 77, 246, .3);
  }
  .btn-primary:focus, .btn-outline:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(108, 77, 246, .4);
  }
  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    background: transparent;
    color: var(--color-primary);
    font-weight: 600;
    border: 1.5px solid var(--color-primary);
    border-radius: var(--btn-radius);
    padding: .7rem 1.5rem;
    font-size: .875rem;
    cursor: pointer;
    transition: all .3s ease;
  }
  .btn-outline:hover {
    background: rgba(108, 77, 246, .08);
    transform: translateY(-2px);
  }

  /* ===== 筛选按钮 ===== */
  .filter-btn {
    display: inline-flex;
    align-items: center;
    padding: .4rem 1rem;
    border-radius: 9999px;
    font-size: .8rem;
    font-weight: 500;
    color: var(--color-muted);
    background: #fff;
    border: 1px solid #e5e5e5;
    white-space: nowrap;
    transition: all .3s ease;
    cursor: pointer;
  }
  .filter-btn:hover {
    background: var(--color-brand-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
  }
  .filter-btn.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(108, 77, 246, .2);
  }

  /* ===== 标签 ===== */
  .tag-pill {
    display: inline-flex;
    align-items: center;
    gap: .25rem;
    padding: .25rem .7rem;
    border-radius: 9999px;
    font-size: .75rem;
    font-weight: 600;
    background: var(--color-brand-light);
    color: var(--color-primary);
  }

  /* ===== 分页按钮 ===== */
  .pagination-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    font-size: .85rem;
    font-weight: 500;
    color: var(--color-muted);
    background: #fff;
    border: 1px solid #e5e5e5;
    transition: all .3s ease;
    cursor: pointer;
  }
  .pagination-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-brand-light);
  }
  .pagination-btn.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: #fff;
    border-color: transparent;
  }

  /* ===== FAQ ===== */
  .faq-item {
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 1rem;
    overflow: hidden;
    transition: all .3s ease;
  }
  .faq-item + .faq-item { margin-top: .75rem; }
  .faq-item.open {
    border-color: var(--color-primary);
    box-shadow: 0 8px 20px rgba(108, 77, 246, .1);
  }
  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.1rem 1.25rem;
    background: transparent;
    border: none;
    font-size: .95rem;
    font-weight: 600;
    color: var(--color-ink);
    cursor: pointer;
    text-align: left;
  }
  .faq-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-brand-light);
    color: var(--color-primary);
    font-size: .85rem;
    transition: transform .3s ease;
  }
  .faq-item.open .faq-icon {
    transform: rotate(45deg);
    background: var(--color-primary);
    color: #fff;
  }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
  }
  .faq-answer-inner {
    padding: 0 1.25rem 1.2rem;
    font-size: .875rem;
    color: var(--color-muted);
    line-height: 1.7;
  }

  /* ===== 更新信息条 ===== */
  .update-strip {
    background: linear-gradient(90deg, #F0ECFF, #FFF4EC);
    border: 1px solid rgba(108, 77, 246, .15);
    border-radius: 14px;
  }

  /* ===== 数字字体 ===== */
  .date-badge, .stat-number {
    font-family: "DIN Alternate", "Oswald", "Bahnschrift", sans-serif;
    font-weight: 600;
  }

  /* ===== 响应式补充 ===== */
  @media (max-width: 767px) {
    .btn-primary { padding: .65rem 1.2rem; }
    .filter-btn { font-size: .75rem; padding: .35rem .8rem; }
  }
  @media (min-width: 768px) and (max-width: 1023px) {
    .btn-primary { padding: .7rem 1.3rem; }
  }