/* roulang page: index */
:root {
    --primary: #2563EB;
    --accent: #22D3EE;
    --bg: #0B1121;
    --text: #F1F5F9;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    --glass-bg: rgba(255,255,255,0.04);
    --glass-border: rgba(255,255,255,0.12);
    --glass-hover-bg: rgba(255,255,255,0.08);
    --glass-hover-border: rgba(255,255,255,0.20);
    --glow: 0 0 24px rgba(34,211,238,0.30);
    --glow-hover: 0 0 36px rgba(34,211,238,0.50);
    --shadow-card: 0 12px 40px rgba(37,99,235,0.18);
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { background-color:var(--bg); color:var(--text); font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif; line-height:1.7; -webkit-font-smoothing:antialiased; }
img { max-width:100%; display:block; }
a { color:inherit; text-decoration:none; }
button { font-family:inherit; border:none; background:none; cursor:pointer; color:inherit; }
input,textarea { font-family:inherit; }

.container-custom { max-width:80rem; margin:0 auto; padding-left:1rem; padding-right:1rem; }
@media (min-width:640px){ .container-custom{ padding-left:1.5rem; padding-right:1.5rem; } }
@media (min-width:1024px){ .container-custom{ padding-left:2rem; padding-right:2rem; } }

.glass-card {
    background: linear-gradient(135deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.01) 100%), rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.12);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 1rem;
    transition: all 0.3s ease;
}
.glass-card:hover {
    background: linear-gradient(135deg, rgba(255,255,255,0.10) 0%, rgba(255,255,255,0.02) 100%), rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.20);
    box-shadow: 0 12px 40px rgba(37,99,235,0.18);
}

.btn-glow {
    background: linear-gradient(135deg, #2563EB, #22D3EE);
    border-radius: 0.5rem;
    color: #fff;
    font-weight: 500;
    box-shadow: 0 0 24px rgba(34,211,238,0.30);
    transition: all 0.2s ease;
    padding: 0.75rem 1.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    line-height: 1.4;
}
.btn-glow:hover { box-shadow: 0 0 36px rgba(34,211,238,0.50); transform: translateY(-2px); }
.btn-glow:active { transform: translateY(0); }
.btn-glow:focus-visible { outline: 2px solid #22D3EE; outline-offset: 2px; }

.btn-ghost {
    border: 1px solid rgba(255,255,255,0.20);
    border-radius: 0.5rem;
    color: #E2E8F0;
    padding: 0.75rem 1.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    transition: all 0.2s ease;
}
.btn-ghost:hover { border-color: rgba(34,211,238,0.6); color: #22D3EE; }
.btn-ghost:focus-visible { outline: 2px solid #22D3EE; outline-offset: 2px; }

.badge {
    display: inline-flex;
    align-items: center;
    border-radius: 9999px;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    background: rgba(34,211,238,0.10);
    color: #67E8F9;
    border: 1px solid rgba(34,211,238,0.20);
    font-weight: 400;
}

.site-header {
    background: rgba(11,17,33,0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-link {
    color: #CBD5E1;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
    padding-bottom: 0.25rem;
    display: inline-block;
}
.nav-link:hover { color: #F1F5F9; }
.nav-link.active { color: #22D3EE; }
.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #2563EB, #22D3EE);
    border-radius: 2px;
}

.section-title-underline { position: relative; padding-bottom: 0.75rem; }
.section-title-underline::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, #2563EB, #22D3EE);
    border-radius: 2px;
}

.faq-item { border-bottom: 1px solid rgba(255,255,255,0.05); }
.faq-item:last-child { border-bottom: none; }
.faq-question { width:100%; display:flex; align-items:center; justify-content:space-between; padding:1.25rem 1.5rem; text-align:left; cursor:pointer; transition:color 0.2s; font-size:0.9375rem; color:#E2E8F0; font-weight:500; }
.faq-question:hover { color:#22D3EE; }
.faq-icon { transition: transform 0.3s ease; color:#22D3EE; line-height:1; font-size:1.25rem; }
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height:0; overflow:hidden; transition:max-height 0.4s ease; }
.faq-item.active .faq-answer { max-height:300px; }
.faq-answer-inner { padding:0 1.5rem 1.25rem; font-size:0.875rem; color:#94A3B8; line-height:1.8; }

.news-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    border-radius: 0.75rem;
    transition: background 0.2s;
}
.news-item:hover { background: rgba(255,255,255,0.05); }

.form-input {
    width: 100%;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: 0.5rem;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    color: #F1F5F9;
    transition: all 0.2s;
    outline: none;
}
.form-input::placeholder { color: #64748B; }
.form-input:focus { border-color: rgba(34,211,238,0.7); box-shadow: 0 0 0 2px rgba(34,211,238,0.15); }

.window-grid-bg {
    background-image: linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
    background-size: 40px 40px;
}

.hero-bg {
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    position: relative;
}
.hero-bg::before {
    content:'';
    position:absolute;
    inset:0;
    background: linear-gradient(to top, #0B1121 0%, rgba(11,17,33,0.6) 50%, transparent 100%);
}
.hero-bg::after {
    content:'';
    position:absolute;
    inset:0;
    background: radial-gradient(circle at 30% 50%, rgba(37,99,235,0.25), transparent 60%);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11,17,33,0.98);
    backdrop-filter: blur(20px);
    z-index: 100;
    padding: 1.5rem;
}
.mobile-menu.open { display: block; }

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

.hamburger-btn {
    width: 36px;
    height: 36px;
    border-radius: 0.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    border: 1px solid rgba(255,255,255,0.10);
    background: rgba(255,255,255,0.03);
}
.hamburger-btn span {
    width: 18px;
    height: 1.5px;
    background: #E2E8F0;
    display: block;
    border-radius: 2px;
    transition: all 0.3s;
}
.hamburger-btn:hover span { background: #22D3EE; }
.hamburger-btn.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger-btn.active span:nth-child(2) { opacity: 0; }
.hamburger-btn.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 768px) {
    .btn-glow, .btn-ghost { width: 100%; }
    .hero-min-height { min-height: auto !important; padding: 4rem 0 6rem !important; }
}

/* roulang page: category1 */
:root {
            --bg-primary: #0B1121;
            --color-primary: #2563EB;
            --color-accent: #22D3EE;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --card-border: rgba(255, 255, 255, 0.12);
            --card-bg: rgba(255, 255, 255, 0.04);
            --radius-lg: 1rem;
            --radius-md: 0.5rem;
            --shadow-glow: 0 0 24px rgba(34, 211, 238, 0.30);
            --shadow-glow-hover: 0 0 36px rgba(34, 211, 238, 0.50);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

        @media (min-width: 640px) {
            .container-custom {
                padding: 0 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container-custom {
                padding: 0 2rem;
            }
        }

        .glass-card {
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.01) 100%), var(--card-bg);
            border: 1px solid var(--card-border);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            transition: all 0.3s ease;
        }

        .glass-card:hover {
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.10) 0%, rgba(255, 255, 255, 0.02) 100%), rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.20);
            box-shadow: 0 12px 40px rgba(37, 99, 235, 0.18);
            transform: translateY(-2px);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            padding: 0.75rem 1.5rem;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            font-weight: 500;
            box-shadow: var(--shadow-glow);
            transition: all 0.2s ease;
            cursor: pointer;
            border: none;
            text-decoration: none;
            font-size: 0.875rem;
        }

        .btn-primary:hover {
            box-shadow: var(--shadow-glow-hover);
            transform: translateY(-2px);
        }

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

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            padding: 0.75rem 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.20);
            color: #E2E8F0;
            transition: all 0.2s ease;
            cursor: pointer;
            background: transparent;
            text-decoration: none;
            font-size: 0.875rem;
        }

        .btn-ghost:hover {
            border-color: rgba(34, 211, 238, 0.60);
            color: var(--color-accent);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            border-radius: 9999px;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            background: rgba(34, 211, 238, 0.10);
            color: #67E8F9;
            border: 1px solid rgba(34, 211, 238, 0.20);
            white-space: nowrap;
        }

        .nav-link {
            position: relative;
            color: #CBD5E1;
            font-size: 0.875rem;
            font-weight: 500;
            text-decoration: none;
            padding: 0.25rem 0;
            transition: color 0.2s ease;
        }

        .nav-link:hover {
            color: #fff;
        }

        .nav-link.active {
            color: var(--color-accent);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            border-radius: 2px 2px 0 0;
        }

        .title-decor {
            display: inline-block;
            width: 40px;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            border-radius: 2px;
            margin-bottom: 0.75rem;
        }

        .section-heading {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.35;
            margin-top: 0.5rem;
        }

        @media (min-width: 768px) {
            .section-heading {
                font-size: 1.875rem;
            }
        }

        .form-input {
            width: 100%;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: var(--radius-md);
            padding: 0.65rem 1rem;
            font-size: 0.875rem;
            color: var(--text-primary);
            outline: none;
            transition: all 0.2s ease;
        }

        .form-input::placeholder {
            color: #64748B;
        }

        .form-input:focus {
            border-color: rgba(34, 211, 238, 0.70);
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.20);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, opacity 0.3s ease, padding 0.3s ease;
            opacity: 0;
            padding-top: 0;
            padding-bottom: 0;
        }

        .faq-answer.open {
            max-height: 320px;
            opacity: 1;
            padding-bottom: 1.25rem;
        }

        .faq-icon {
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-icon.rotated {
            transform: rotate(45deg);
        }

        .mobile-menu {
            display: none;
        }

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

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

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .step-number {
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1;
            background: linear-gradient(to bottom, rgba(37, 99, 235, 0.35), transparent);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            position: absolute;
            top: 0.75rem;
            right: 1rem;
            pointer-events: none;
        }

        @media (min-width: 768px) {
            .step-number {
                font-size: 4.5rem;
            }
        }

        .img-grid-bg {
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 20px 20px;
        }

        .icon-svg {
            width: 24px;
            height: 24px;
            stroke: var(--color-accent);
            fill: none;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

/* roulang page: article */
:root {
            --bg-dark: #0B1121;
            --bg-deep: #080C19;
            --primary: #2563EB;
            --accent: #22D3EE;
            --text-body: #F1F5F9;
            --text-sub: #94A3B8;
            --text-weak: #64748B;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-card: rgba(255, 255, 255, 0.12);
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-hover: rgba(255, 255, 255, 0.08);
            --radius-card: 1.25rem;
            --shadow-glow: 0 0 24px rgba(34, 211, 238, 0.30);
            --shadow-card: 0 12px 40px rgba(37, 99, 235, 0.18);
        }
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            line-height: 1.7;
            background-color: var(--bg-dark);
            color: var(--text-body);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        .container-custom {
            width: 100%;
            max-width: 80rem;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) {
            .container-custom {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        .glass-card {
            background-color: var(--glass-bg);
            background-image: linear-gradient(135deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.01) 100%);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-card);
            backdrop-filter: blur(1.5rem);
            transition: all 0.3s ease;
        }
        .glass-card:hover {
            background-color: var(--glass-hover);
            border-color: rgba(255, 255, 255, 0.20);
            box-shadow: var(--shadow-card);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border-radius: 0.5rem;
            padding: 0.75rem 1.5rem;
            background-image: linear-gradient(135deg, #2563EB, #22D3EE);
            color: #fff;
            font-weight: 500;
            box-shadow: var(--shadow-glow);
            transition: all 0.2s ease;
            border: none;
        }
        .btn-primary:hover {
            box-shadow: 0 0 36px rgba(34, 211, 238, 0.50);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-primary:focus-visible {
            outline: 2px solid #22D3EE;
            outline-offset: 2px;
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border-radius: 0.5rem;
            padding: 0.75rem 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.20);
            color: #e2e8f0;
            transition: all 0.2s ease;
            background: transparent;
        }
        .btn-ghost:hover {
            border-color: rgba(34, 211, 238, 0.60);
            color: #22D3EE;
        }
        .btn-ghost:focus-visible {
            outline: 2px solid #22D3EE;
            outline-offset: 2px;
        }
        .nav-link {
            position: relative;
            color: #cbd5e1;
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.5rem 0.25rem;
            transition: color 0.2s ease;
        }
        .nav-link:hover {
            color: #ffffff;
        }
        .nav-link.active {
            color: #22D3EE;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: linear-gradient(to right, #2563EB, #22D3EE);
            border-radius: 2px;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            border-radius: 9999px;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            background: rgba(34, 211, 238, 0.10);
            color: #67E8F9;
            border: 1px solid rgba(34, 211, 238, 0.20);
        }
        .section-title {
            position: relative;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            display: block;
            width: 40px;
            height: 2px;
            background: linear-gradient(to right, #2563EB, #22D3EE);
            border-radius: 2px;
            margin-top: 0.5rem;
        }
        .article-content {
            font-size: 1rem;
            line-height: 1.9;
            color: #cbd5e1;
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-top: 3rem;
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        .article-content h2::before {
            content: '';
            display: inline-block;
            width: 3px;
            height: 1.4rem;
            background: linear-gradient(to bottom, #2563EB, #22D3EE);
            border-radius: 3px;
            margin-right: 0.75rem;
            vertical-align: middle;
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: #fff;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        .article-content p {
            margin-bottom: 1.5rem;
        }
        .article-content blockquote {
            border-left: 4px solid rgba(34, 211, 238, 0.70);
            background: rgba(255, 255, 255, 0.05);
            border-radius: 0 1rem 1rem 0;
            padding: 1.25rem 1.5rem;
            color: #cbd5e1;
            font-style: italic;
            margin: 2rem 0;
        }
        .article-content ul {
            list-style: none;
            padding-left: 0;
            margin: 1.5rem 0;
        }
        .article-content ul li {
            position: relative;
            padding-left: 1.5rem;
            margin-bottom: 0.5rem;
        }
        .article-content ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.6em;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #22D3EE;
        }
        .article-content ol {
            list-style: decimal;
            padding-left: 1.5rem;
            margin: 1.5rem 0;
        }
        .article-content ol li {
            margin-bottom: 0.5rem;
        }
        .article-content img {
            border-radius: 1rem;
            margin: 2.5rem 0;
            width: 100%;
            height: auto;
        }
        .article-content figcaption {
            text-align: center;
            font-size: 0.75rem;
            color: var(--text-weak);
            margin-top: -1.5rem;
            margin-bottom: 2rem;
        }
        .article-content a {
            color: #60A5FA;
            text-decoration: underline;
            text-decoration-style: dashed;
            text-underline-offset: 4px;
        }
        .article-content a:hover {
            color: #22D3EE;
        }
        .article-content code {
            background: rgba(255, 255, 255, 0.10);
            border-radius: 0.25rem;
            padding: 0.125rem 0.375rem;
            font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
            font-size: 0.875rem;
            color: #67E8F9;
        }
        .article-content pre {
            background: #0D1525;
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 0.75rem;
            padding: 1.5rem;
            font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
            font-size: 0.875rem;
            line-height: 1.75;
            color: #cbd5e1;
            overflow-x: auto;
            margin: 2rem 0;
        }
        .article-content pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 2rem 0;
        }
        .article-content th,
        .article-content td {
            border: 1px solid rgba(255, 255, 255, 0.10);
            padding: 0.75rem 1rem;
            text-align: left;
        }
        .article-content th {
            background: rgba(255, 255, 255, 0.05);
            color: #fff;
            font-weight: 600;
        }
        .article-content hr {
            border: none;
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            margin: 3rem 0;
        }
        .line-clamp-1 {
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .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;
        }
        @media (max-width: 640px) {
            .btn-primary,
            .btn-ghost {
                width: 100%;
            }
        }