/* roulang page: index */
:root {
            --bg: #F5F8FC;
            --card: #FFFFFF;
            --brand: #1E6FDE;
            --brand-dark: #1756B0;
            --deep: #0F3B6F;
            --accent: #F5A623;
            --success: #00A67E;
            --ink: #1A2B3D;
            --muted: #5B6C80;
            --border: #E3EAF2;
            --r-card: 16px;
            --sh-card: 0 2px 8px rgba(15,59,111,.06);
            --sh-hover: 0 12px 32px rgba(15,59,111,.12);
            --sh-btn: 0 4px 14px rgba(30,111,222,.3);
            --tr: all .3s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg);
            color: var(--ink);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

        a,
        button {
            transition: var(--tr);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: none;
            box-shadow: 0 0 0 2px rgba(30, 111, 222, .3);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

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

        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }

        .no-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }

        .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;
        }

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

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

        .btn-press:active {
            transform: scale(.98);
        }

        .section-anchor {
            scroll-margin-top: 7rem;
        }

        @media (max-width:480px) {
            .card-inner-pad {
                padding: 1rem;
            }
        }

/* roulang page: article */
:root {
    --brand: #1E6FDE;
    --brand-dark: #1756B0;
    --deep: #0F3B6F;
    --safe: #00A67E;
    --accent: #F5A623;
    --text-main: #1A2B3D;
    --text-sub: #5B6C80;
    --border: #E3EAF2;
    --bg-page: #F5F8FC;
    --shadow-card: 0 2px 8px rgba(15,59,111,0.06);
    --shadow-hover: 0 12px 32px rgba(15,59,111,0.12);
    --radius: 16px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--bg-page);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button, input { font-family: inherit; }
.search-input {
    background: #EDF2F8;
    border-radius: 999px;
    transition: box-shadow 0.3s;
}
.search-input:focus-within {
    box-shadow: 0 0 0 3px rgba(30,111,222,0.2);
}
.search-input input {
    background: transparent;
    border: none;
    outline: none;
    flex: 1;
    font-size: 0.875rem;
    color: var(--text-main);
}
.search-input input::placeholder { color: #94A3B8; }
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--brand);
    color: #fff;
    border-radius: 999px;
    padding: 0.625rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 4px 14px rgba(30,111,222,0.3);
    transition: all 0.25s;
    border: none;
    cursor: pointer;
}
.btn-primary:hover { background: var(--brand-dark); transform: translateY(-1px); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(30,111,222,0.4);
}
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #fff;
    color: var(--brand);
    border: 1px solid var(--brand);
    border-radius: 999px;
    padding: 0.625rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.25s;
    cursor: pointer;
}
.btn-secondary:hover { background: #F0F6FF; }
.btn-secondary:active { transform: scale(0.98); }
.side-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
}
.tag {
    display: inline-flex;
    align-items: center;
    background: #F1F5F9;
    color: #64748B;
    font-size: 0.8rem;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    transition: all 0.2s;
}
.tag:hover { background: rgba(30,111,222,0.1); color: var(--brand); }
.recommend-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: all 0.3s;
}
.recommend-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}
.recommend-card:hover .recommend-title { color: var(--brand); }
.footer-link {
    color: #94A3B8;
    font-size: 0.875rem;
    transition: color 0.2s;
}
.footer-link:hover { color: #fff; }
.article-body p {
    margin-bottom: 1.5rem;
    font-size: 17px;
    line-height: 2;
    color: var(--text-main);
}
.article-body h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid #F1F5F9;
    line-height: 1.3;
    color: var(--text-main);
}
.article-body h2:first-child { border-top: none; padding-top: 0; }
.article-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}
.article-body ul {
    list-style: disc;
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-sub);
}
.article-body ol {
    list-style: decimal;
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-sub);
}
.article-body li { margin-bottom: 0.4rem; }
.article-body blockquote {
    border-left: 4px solid var(--brand);
    background: rgba(30,111,222,0.05);
    padding: 1rem 1.25rem;
    border-radius: 0 12px 12px 0;
    margin: 1.5rem 0;
    color: var(--text-sub);
}
.article-body table {
    width: 100%;
    font-size: 0.875rem;
    border-collapse: collapse;
    margin: 1.5rem 0;
}
.article-body th {
    background: #F1F5F9;
    font-weight: 600;
    text-align: left;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #E2E8F0;
}
.article-body td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #E2E8F0;
    color: var(--text-sub);
}
.article-body code {
    background: #F1F5F9;
    padding: 0.15rem 0.5rem;
    border-radius: 6px;
    font-size: 0.9em;
}
.article-body a {
    color: var(--brand);
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
}
.article-body img { border-radius: 12px; margin: 1.5rem 0; }
.breadcrumb a { color: var(--text-sub); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb .current { color: var(--brand); font-weight: 500; }
@media (max-width: 768px) {
    .article-body p { font-size: 16px; }
    .article-body h2 { font-size: 1.3rem; }
    .article-body h3 { font-size: 1.1rem; }
}

/* roulang page: category1 */
:root {
            --color-bg: #F5F8FC;
            --color-card: #FFFFFF;
            --color-primary: #1E6FDE;
            --color-primary-dark: #1756B0;
            --color-secondary: #0F3B6F;
            --color-green: #00A67E;
            --color-amber: #F5A623;
            --color-text: #1A2B3D;
            --color-muted: #5B6C80;
            --color-border: #E3EAF2;
            --radius-card: 16px;
            --radius-pill: 9999px;
            --shadow-card: 0 2px 8px rgba(15, 59, 111, 0.06);
            --shadow-hover: 0 12px 32px rgba(15, 59, 111, 0.12);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
            background-color: #f1f5f9;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        input,
        button {
            outline: none;
        }
        .container-x {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        @media (min-width: 768px) {
            .container-x {
                padding: 0 2rem;
            }
        }
        .section {
            padding: 4rem 0;
        }
        @media (min-width: 768px) {
            .section {
                padding: 6rem 0;
            }
        }
        .card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-pill);
            padding: .625rem 1.5rem;
            font-weight: 500;
            transition: all .3s ease;
            box-shadow: 0 4px 14px rgba(30, 111, 222, .3);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
        }
        .btn-primary:active {
            transform: scale(.98);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
            border-radius: var(--radius-pill);
            padding: .625rem 1.5rem;
            font-weight: 500;
            transition: all .3s ease;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background: #eff6ff;
        }
        .btn-secondary:active {
            transform: scale(.98);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid #93c5fd;
            outline-offset: 2px;
        }
        .nav-link {
            padding: .5rem 1rem;
            border-radius: .5rem;
            color: #64748b;
            font-size: .875rem;
            font-weight: 500;
            transition: color .2s ease, background .2s ease;
        }
        .nav-link:hover {
            color: var(--color-primary);
            background: #f0f6ff;
        }
        .nav-link-active {
            color: var(--color-primary);
            border-bottom: 2px solid var(--color-primary);
            font-weight: 600;
            border-radius: 0;
        }
        .nav-link-active:hover {
            background: transparent;
        }
        .faq-answer {
            display: none;
        }
        .faq-item.is-open .faq-answer {
            display: block;
        }
        .faq-item.is-open .faq-icon {
            transform: rotate(180deg);
        }
        .faq-icon {
            transition: transform .3s ease;
        }
        @media (max-width: 480px) {
            .btn-primary,
            .btn-secondary {
                padding-left: 1.25rem;
                padding-right: 1.25rem;
            }
            .card {
                padding: 1rem;
            }
        }

/* roulang page: category2 */
:root {
  --color-primary: #1E6FDE;
  --color-primary-dark: #1756B0;
  --color-deep-blue: #0F3B6F;
  --color-safety-green: #00A67E;
  --color-accent-gold: #F5A623;
  --color-text-main: #1A2B3D;
  --color-text-sub: #5B6C80;
  --color-border-light: #E3EAF2;
  --color-bg-main: #F5F8FC;
  --radius-card: 16px;
  --shadow-card: 0 2px 8px rgba(15,59,111,0.06);
  --shadow-card-hover: 0 12px 32px rgba(15,59,111,0.12);
  --container-max: 1200px;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background-color: var(--color-bg-main);
  color: var(--color-text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  height: auto;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  cursor: pointer;
}
.anchor-offset {
  scroll-margin-top: 7rem;
}
.card-hover {
  transition: all 0.3s ease;
}
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
img.load-error {
  background-color: #f1f5f9;
  position: relative;
  min-height: 60px;
}