/* roulang page: index */
:root {
            --color-primary: #2563eb;
            --color-primary-dark: #1d4ed8;
            --color-primary-light: #60a5fa;
            --color-accent: #f97316;
            --color-accent-dark: #ea580c;
            --color-bg: #ffffff;
            --color-bg-alt: #f8fafc;
            --color-bg-dark: #0f172a;
            --color-text: #0f172a;
            --color-text-muted: #64748b;
            --color-text-light: #94a3b8;
            --color-border: #e2e8f0;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-card-hover: 0 10px 25px rgba(0,0,0,0.08), 0 4px 10px rgba(0,0,0,0.04);
            --shadow-nav: 0 1px 3px rgba(0,0,0,0.04);
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
            padding: 0;
        }

        input:focus,
        textarea:focus,
        select:focus {
            outline: none;
        }

        .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;
            }
        }

        @media (min-width: 1280px) {
            .container {
                padding-left: 2.5rem;
                padding-right: 2.5rem;
            }
        }

        .section-padding {
            padding-top: 4rem;
            padding-bottom: 4rem;
        }

        @media (min-width: 768px) {
            .section-padding {
                padding-top: 5rem;
                padding-bottom: 5rem;
            }
        }

        @media (min-width: 1024px) {
            .section-padding {
                padding-top: 6rem;
                padding-bottom: 6rem;
            }
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 0.75rem;
        }

        @media (min-width: 768px) {
            .section-title {
                font-size: 2.25rem;
            }
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-muted);
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .text-gradient {
            background: linear-gradient(135deg, var(--color-primary), #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background: var(--color-primary);
            border-radius: var(--radius-md);
            transition: var(--transition-base);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
        }

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

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            background: var(--color-accent);
            border-radius: var(--radius-md);
            transition: var(--transition-base);
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.25);
        }

        .btn-accent:hover {
            background: var(--color-accent-dark);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.35);
            transform: translateY(-2px);
        }

        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.2);
        }

        .btn-accent:focus-visible {
            outline: 2px solid #fdba74;
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            background: transparent;
            border: 2px solid var(--color-primary);
            border-radius: var(--radius-md);
            transition: var(--transition-base);
        }

        .btn-outline:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }

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

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

        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            border: 1px solid var(--color-border);
            overflow: hidden;
        }

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

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.25rem 0.75rem;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 9999px;
            background: var(--color-bg-alt);
            color: var(--color-text-muted);
            border: 1px solid var(--color-border);
        }

        .badge-primary {
            background: rgba(37, 99, 235, 0.1);
            color: var(--color-primary);
            border-color: rgba(37, 99, 235, 0.2);
        }

        .badge-accent {
            background: rgba(249, 115, 22, 0.1);
            color: var(--color-accent);
            border-color: rgba(249, 115, 22, 0.2);
        }

        .tag {
            display: inline-block;
            padding: 0.2rem 0.6rem;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            background: var(--color-bg-alt);
            color: var(--color-text-muted);
            transition: var(--transition-base);
        }

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

        .divider {
            width: 100%;
            height: 1px;
            background: var(--color-border);
            margin: 2rem 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: 1.25rem 0;
        }

        .faq-item:first-child {
            border-top: 1px solid var(--color-border);
        }

        .faq-question {
            font-weight: 600;
            font-size: 1.05rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 1rem;
        }

        .faq-question i {
            color: var(--color-primary);
            font-size: 1.1rem;
            transition: var(--transition-base);
            flex-shrink: 0;
        }

        .faq-answer {
            color: var(--color-text-muted);
            margin-top: 0.75rem;
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1;
            background: linear-gradient(135deg, var(--color-primary), #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        @media (min-width: 768px) {
            .stat-number {
                font-size: 3rem;
            }
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin-top: 0.5rem;
        }

        .hero-gradient {
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #172554 100%);
        }

        .hero-glow {
            position: absolute;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            filter: blur(120px);
            opacity: 0.15;
            pointer-events: none;
        }

        .hero-glow-1 {
            background: var(--color-primary);
            top: -200px;
            right: -100px;
        }

        .hero-glow-2 {
            background: #7c3aed;
            bottom: -200px;
            left: -100px;
        }

        .news-item {
            display: flex;
            gap: 1rem;
            padding: 1rem 0;
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition-base);
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item:hover {
            padding-left: 0.5rem;
        }

        .news-date {
            font-size: 0.85rem;
            color: var(--color-text-light);
            white-space: nowrap;
            flex-shrink: 0;
            margin-top: 0.15rem;
        }

        .news-title {
            font-weight: 500;
            color: var(--color-text);
            transition: var(--transition-base);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-title:hover {
            color: var(--color-primary);
        }

        .news-meta {
            font-size: 0.8rem;
            color: var(--color-text-light);
            margin-top: 0.25rem;
        }

        .news-meta span {
            margin-right: 0.75rem;
        }

        .feature-icon {
            width: 3rem;
            height: 3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            font-size: 1.35rem;
            color: #fff;
            flex-shrink: 0;
        }

        .feature-icon-blue {
            background: linear-gradient(135deg, #3b82f6, #2563eb);
        }

        .feature-icon-purple {
            background: linear-gradient(135deg, #8b5cf6, #7c3aed);
        }

        .feature-icon-orange {
            background: linear-gradient(135deg, #fb923c, #f97316);
        }

        .feature-icon-green {
            background: linear-gradient(135deg, #34d399, #10b981);
        }

        .feature-icon-rose {
            background: linear-gradient(135deg, #f472b6, #ec4899);
        }

        .feature-icon-cyan {
            background: linear-gradient(135deg, #22d3ee, #06b6d4);
        }

        .cta-section {
            background: linear-gradient(135deg, #1e3a8a 0%, #312e81 50%, #1e40af 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-glow {
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            filter: blur(100px);
            opacity: 0.12;
            pointer-events: none;
        }

        .cta-glow-1 {
            background: #60a5fa;
            top: -150px;
            right: -50px;
        }

        .cta-glow-2 {
            background: #a78bfa;
            bottom: -150px;
            left: -50px;
        }

        .footer-link {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            transition: var(--transition-base);
        }

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

        .footer-heading {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--color-text);
            margin-bottom: 1rem;
        }

        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 23, 42, 0.5);
            backdrop-filter: blur(8px);
            z-index: 50;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition-base);
        }

        .mobile-menu.open {
            opacity: 1;
            visibility: visible;
        }

        .mobile-menu-panel {
            position: absolute;
            top: 0;
            right: 0;
            width: 80%;
            max-width: 380px;
            height: 100%;
            background: #fff;
            padding: 2rem 1.5rem;
            transform: translateX(100%);
            transition: var(--transition-base);
            box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
        }

        .mobile-menu.open .mobile-menu-panel {
            transform: translateX(0);
        }

        .mobile-menu-item {
            display: block;
            padding: 0.85rem 0;
            font-size: 1.05rem;
            font-weight: 500;
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition-base);
        }

        .mobile-menu-item:hover {
            color: var(--color-primary);
        }

        .mobile-menu-item.active {
            color: var(--color-primary);
        }

        @media (max-width: 767px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: flex !important;
            }
        }

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

        .search-input {
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            border-radius: 9999px;
            padding: 0.5rem 1rem 0.5rem 2.5rem;
            font-size: 0.9rem;
            width: 200px;
            transition: var(--transition-base);
        }

        .search-input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
            width: 240px;
        }

        .search-wrapper {
            position: relative;
        }

        .search-icon {
            position: absolute;
            left: 0.85rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-light);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .empty-state {
            text-align: center;
            padding: 2.5rem 1rem;
            color: var(--color-text-muted);
        }

        .empty-state i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            opacity: 0.4;
        }

        .empty-state p {
            font-size: 0.95rem;
        }

        .news-card {
            transition: var(--transition-base);
        }

        .news-card:hover .news-card-title {
            color: var(--color-primary);
        }

        .news-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }

        .news-card-body {
            padding: 1.25rem;
        }

        .news-card-title {
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition-base);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin-top: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-meta {
            font-size: 0.8rem;
            color: var(--color-text-light);
            margin-top: 0.75rem;
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .step-number {
            width: 2.5rem;
            height: 2.5rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            color: #fff;
            background: var(--color-primary);
            flex-shrink: 0;
        }

        .step-line {
            width: 2px;
            height: 2rem;
            background: var(--color-border);
            margin: 0.5rem 0 0.5rem 1.25rem;
        }

        .step-item:last-child .step-line {
            display: none;
        }

        .logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--color-primary), #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.01em;
        }

        .nav-link {
            position: relative;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.5rem 0;
            color: var(--color-text-muted);
            transition: var(--transition-base);
        }

        .nav-link:hover {
            color: var(--color-primary);
        }

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

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        @media (max-width: 767px) {
            .section-title {
                font-size: 1.5rem;
            }
            .hero-title {
                font-size: 2rem !important;
            }
            .hero-subtitle {
                font-size: 1rem !important;
            }
            .stat-number {
                font-size: 2rem;
            }
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .section-padding {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            .hero-title {
                font-size: 2.75rem !important;
            }
        }

        .animate-fade-in {
            animation: fadeIn 0.8s ease-out forwards;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-fade-in-delay-1 {
            animation-delay: 0.2s;
        }
        .animate-fade-in-delay-2 {
            animation-delay: 0.4s;
        }
        .animate-fade-in-delay-3 {
            animation-delay: 0.6s;
        }

        .hover-lift {
            transition: var(--transition-base);
        }
        .hover-lift:hover {
            transform: translateY(-4px);
        }

        .focus-ring:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

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

/* roulang page: article */
:root{--primary:#4f46e5;--primary-light:#6366f1;--primary-dark:#4338ca;--accent:#9333ea;--accent-light:#a855f7;--bg:#ffffff;--bg-alt:#f8fafc;--bg-card:#ffffff;--text:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--border:#e2e8f0;--radius:0.75rem;--radius-lg:1rem;--shadow-sm:0 1px 3px rgba(0,0,0,0.04);--shadow:0 2px 12px rgba(0,0,0,0.06);--shadow-lg:0 12px 40px rgba(79,70,229,0.12);--transition:all 0.25s cubic-bezier(0.4,0,0.2,1)}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'Inter','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:inherit;text-decoration:none;transition:var(--transition)}
img{max-width:100%;height:auto;display:block}
input,button,textarea{font-family:inherit;font-size:inherit;outline:none;border:none}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}
@media(min-width:768px){.container{padding:0 2rem}}
@media(min-width:1024px){.container{padding:0 2.5rem}}
.logo-text{font-weight:700;background:linear-gradient(135deg,#4f46e5,#9333ea);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-link{position:relative;font-size:0.95rem;font-weight:500;color:#475569;padding:0.5rem 0.25rem;transition:var(--transition);letter-spacing:0.01em}
.nav-link::after{content:'';position:absolute;left:0;bottom:-2px;width:0;height:2.5px;border-radius:4px;background:linear-gradient(90deg,#4f46e5,#9333ea);transition:var(--transition)}
.nav-link:hover{color:#0f172a}
.nav-link:hover::after{width:100%}
.nav-link.active{color:#0f172a;font-weight:600}
.nav-link.active::after{width:100%}
.search-wrapper{position:relative;display:flex;align-items:center}
.search-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:#94a3b8;font-size:0.85rem;pointer-events:none;transition:var(--transition)}
.search-input{width:200px;padding:0.5rem 1rem 0.5rem 2.4rem;border-radius:9999px;border:1.5px solid #e2e8f0;background:#f8fafc;font-size:0.875rem;color:#0f172a;transition:var(--transition)}
.search-input::placeholder{color:#94a3b8;font-size:0.85rem}
.search-input:focus{border-color:#6366f1;background:#ffffff;box-shadow:0 0 0 4px rgba(99,102,241,0.1);width:240px}
.search-input:focus+.search-icon,.search-wrapper:focus-within .search-icon{color:#4f46e5}
.btn-primary{display:inline-flex;align-items:center;gap:0.5rem;padding:0.65rem 1.75rem;border-radius:var(--radius-lg);font-weight:600;font-size:0.95rem;color:#ffffff;background:linear-gradient(135deg,#4f46e5,#9333ea);box-shadow:0 4px 16px rgba(79,70,229,0.3);transition:var(--transition);border:none;cursor:pointer;letter-spacing:0.01em}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(79,70,229,0.35);background:linear-gradient(135deg,#4338ca,#7e22ce)}
.btn-primary:active{transform:translateY(0);box-shadow:0 2px 8px rgba(79,70,229,0.25)}
.btn-outline{display:inline-flex;align-items:center;gap:0.5rem;padding:0.55rem 1.5rem;border-radius:var(--radius-lg);font-weight:600;font-size:0.9rem;color:#4f46e5;background:transparent;border:2px solid #4f46e5;transition:var(--transition);cursor:pointer}
.btn-outline:hover{background:#4f46e5;color:#ffffff;transform:translateY(-1px);box-shadow:0 4px 16px rgba(79,70,229,0.2)}
.mobile-toggle{display:none;flex-shrink:0}
@media(max-width:767px){.desktop-nav{display:none!important}.mobile-toggle{display:flex}}
.mobile-menu{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(15,23,42,0.6);backdrop-filter:blur(8px);z-index:50;opacity:0;visibility:hidden;transition:var(--transition)}
.mobile-menu.open{opacity:1;visibility:visible}
.mobile-menu-panel{position:absolute;top:0;right:0;bottom:0;width:85%;max-width:380px;background:#ffffff;padding:2rem 1.5rem;box-shadow:-8px 0 40px rgba(0,0,0,0.1);transform:translateX(100%);transition:transform 0.3s cubic-bezier(0.4,0,0.2,1)}
.mobile-menu.open .mobile-menu-panel{transform:translateX(0)}
.mobile-menu-close{position:absolute;top:1.2rem;right:1.2rem;width:2.5rem;height:2.5rem;border-radius:50%;background:#f1f5f9;display:flex;align-items:center;justify-content:center;color:#475569;font-size:1.2rem;cursor:pointer;transition:var(--transition)}
.mobile-menu-close:hover{background:#e2e8f0;color:#0f172a}
.mobile-nav-link{display:block;padding:0.75rem 0;font-size:1.1rem;font-weight:500;color:#0f172a;border-bottom:1px solid #f1f5f9;transition:var(--transition)}
.mobile-nav-link:hover{color:#4f46e5;padding-left:0.5rem}
.mobile-nav-link.active{color:#4f46e5;font-weight:700}
.mobile-search-wrapper{position:relative;margin-bottom:1.5rem}
.mobile-search-wrapper .search-icon{left:14px;color:#94a3b8}
.mobile-search-wrapper .search-input{width:100%;padding:0.7rem 1rem 0.7rem 2.6rem;border-radius:9999px;border:1.5px solid #e2e8f0;background:#f8fafc;font-size:0.95rem}
.footer-heading{font-size:0.95rem;font-weight:700;color:#0f172a;margin-bottom:1.2rem;letter-spacing:0.02em}
.footer-link{font-size:0.9rem;color:#64748b;transition:var(--transition);position:relative;padding-left:0}
.footer-link:hover{color:#4f46e5;padding-left:4px}
.footer-link::before{content:'›';position:absolute;left:-12px;opacity:0;transition:var(--transition)}
.footer-link:hover::before{opacity:1;left:-4px}
.badge{display:inline-flex;align-items:center;padding:0.2rem 0.85rem;border-radius:9999px;font-size:0.75rem;font-weight:600;letter-spacing:0.02em;background:#eef2ff;color:#4f46e5;border:1px solid #c7d2fe}
.badge-accent{background:#faf5ff;color:#9333ea;border-color:#e9d5ff}
.badge-green{background:#ecfdf5;color:#059669;border-color:#a7f3d0}
.badge-orange{background:#fff7ed;color:#ea580c;border-color:#fed7aa}
.breadcrumb{display:flex;align-items:center;gap:0.5rem;font-size:0.9rem;color:#64748b;flex-wrap:wrap}
.breadcrumb a{color:#64748b;transition:var(--transition)}
.breadcrumb a:hover{color:#4f46e5}
.breadcrumb .sep{color:#cbd5e1;font-size:0.75rem}
.breadcrumb .current{color:#0f172a;font-weight:600}
.article-card{background:#ffffff;border-radius:var(--radius-lg);border:1px solid #f1f5f9;padding:1.5rem;transition:var(--transition);box-shadow:var(--shadow-sm)}
.article-card:hover{box-shadow:var(--shadow-lg);border-color:#e0e7ff;transform:translateY(-2px)}
.section-title{font-size:1.75rem;font-weight:800;color:#0f172a;letter-spacing:-0.02em;line-height:1.3}
.section-subtitle{font-size:1.05rem;color:#64748b;margin-top:0.5rem;max-width:600px}
.divider{height:1px;background:linear-gradient(90deg,transparent,#e2e8f0,transparent);margin:2rem 0}
.blog-content{font-size:1.05rem;line-height:1.9;color:#1e293b}
.blog-content h2{font-size:1.5rem;font-weight:700;margin:2rem 0 1rem;color:#0f172a;padding-bottom:0.5rem;border-bottom:2px solid #f1f5f9}
.blog-content h3{font-size:1.25rem;font-weight:600;margin:1.5rem 0 0.75rem;color:#0f172a}
.blog-content p{margin-bottom:1.2rem}
.blog-content ul,.blog-content ol{padding-left:1.5rem;margin-bottom:1.2rem}
.blog-content ul{list-style:disc}
.blog-content ol{list-style:decimal}
.blog-content li{margin-bottom:0.4rem}
.blog-content a{color:#4f46e5;text-decoration:underline;text-underline-offset:2px}
.blog-content a:hover{color:#4338ca}
.blog-content blockquote{border-left:4px solid #4f46e5;padding:1rem 1.5rem;margin:1.5rem 0;background:#f8fafc;border-radius:0 var(--radius) var(--radius) 0;color:#475569;font-style:italic}
.blog-content img{border-radius:var(--radius);margin:1.5rem 0;box-shadow:var(--shadow)}
.blog-content pre{background:#0f172a;color:#e2e8f0;padding:1.25rem 1.5rem;border-radius:var(--radius);overflow-x:auto;margin:1.5rem 0;font-size:0.9rem;line-height:1.6}
.blog-content code{background:#f1f5f9;color:#4f46e5;padding:0.15rem 0.5rem;border-radius:6px;font-size:0.9em;font-weight:500}
.blog-content pre code{background:transparent;color:inherit;padding:0;border-radius:0;font-weight:400}
.tag{display:inline-block;padding:0.2rem 0.8rem;border-radius:9999px;font-size:0.8rem;font-weight:500;background:#f1f5f9;color:#64748b;border:1px solid #e2e8f0;transition:var(--transition);cursor:pointer}
.tag:hover{background:#eef2ff;color:#4f46e5;border-color:#c7d2fe}
.cta-section{background:linear-gradient(135deg,#eef2ff,#faf5ff);border-radius:var(--radius-lg);padding:2.5rem 2rem;border:1px solid #e0e7ff}
@media(min-width:768px){.cta-section{padding:3.5rem 3rem}}
.cta-section h3{font-size:1.5rem;font-weight:800;color:#0f172a}
.cta-section p{color:#64748b;max-width:500px}
.related-card{background:#ffffff;border-radius:var(--radius);border:1px solid #f1f5f9;padding:1.25rem;transition:var(--transition);box-shadow:var(--shadow-sm)}
.related-card:hover{box-shadow:var(--shadow-lg);border-color:#e0e7ff;transform:translateY(-2px)}
.related-card h4{font-size:1rem;font-weight:600;color:#0f172a;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .meta{font-size:0.8rem;color:#94a3b8;margin-top:0.5rem}
.not-found{text-align:center;padding:4rem 2rem}
.not-found i{font-size:3rem;color:#94a3b8;margin-bottom:1rem}
.not-found h2{font-size:1.5rem;font-weight:700;color:#0f172a;margin-bottom:0.5rem}
.not-found p{color:#64748b;margin-bottom:1.5rem}
@media(max-width:639px){.section-title{font-size:1.35rem}.blog-content{font-size:1rem}.blog-content h2{font-size:1.25rem}.cta-section{padding:1.75rem 1.25rem}.cta-section h3{font-size:1.2rem}}

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-light: #3b82f6;
            --primary-dark: #1d4ed8;
            --accent: #7c3aed;
            --accent-light: #8b5cf6;
            --bg-body: #ffffff;
            --bg-soft: #f8fafc;
            --bg-card: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-color: #e2e8f0;
            --radius: 0.75rem;
            --radius-lg: 1rem;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);
            --transition: all 0.25s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            margin: 0;
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        @media (max-width: 640px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }
        /* Logo */
        .logo-text {
            font-weight: 700;
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        /* Navigation */
        .desktop-nav .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.375rem 0.125rem;
            position: relative;
            transition: var(--transition);
        }
        .desktop-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2.5px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transition: var(--transition);
        }
        .desktop-nav .nav-link:hover {
            color: var(--primary);
        }
        .desktop-nav .nav-link:hover::after {
            width: 100%;
        }
        .desktop-nav .nav-link.active {
            color: var(--primary);
        }
        .desktop-nav .nav-link.active::after {
            width: 100%;
        }
        /* Search */
        .search-wrapper {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-wrapper .search-icon {
            position: absolute;
            left: 12px;
            color: var(--text-muted);
            font-size: 0.875rem;
            pointer-events: none;
        }
        .search-wrapper .search-input {
            width: 200px;
            padding: 0.5rem 1rem 0.5rem 2.25rem;
            border: 1.5px solid var(--border-color);
            border-radius: 9999px;
            background: var(--bg-soft);
            font-size: 0.875rem;
            color: var(--text-primary);
            outline: none;
            transition: var(--transition);
        }
        .search-wrapper .search-input::placeholder {
            color: var(--text-muted);
        }
        .search-wrapper .search-input:focus {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
            background: #fff;
        }
        @media (max-width: 768px) {
            .search-wrapper .search-input {
                width: 140px;
                padding: 0.4rem 0.75rem 0.4rem 2rem;
                font-size: 0.8rem;
            }
        }
        /* Button */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            border-radius: 9999px;
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            color: #fff;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
        }
        .btn-primary:focus-visible {
            outline: 2px solid #2563eb;
            outline-offset: 3px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--primary);
            border-radius: 9999px;
            background: transparent;
            color: var(--primary);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(37, 99, 235, 0.2);
        }
        /* Card */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .card-feature {
            padding: 2rem 1.75rem;
            text-align: center;
        }
        .card-feature .icon-wrap {
            width: 60px;
            height: 60px;
            border-radius: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.25rem;
            font-size: 1.5rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.2);
        }
        /* Badge / Tag */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.85rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: var(--primary-50);
            color: var(--primary);
            border: 1px solid rgba(37, 99, 235, 0.15);
        }
        .badge-purple {
            background: #f5f3ff;
            color: #7c3aed;
            border-color: rgba(124, 58, 237, 0.15);
        }
        .badge-green {
            background: #ecfdf5;
            color: #059669;
            border-color: rgba(5, 150, 105, 0.15);
        }
        .badge-orange {
            background: #fff7ed;
            color: #ea580c;
            border-color: rgba(234, 88, 12, 0.15);
        }
        /* Section spacing */
        .section-padding {
            padding: 4.5rem 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 3rem 0;
            }
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 2.5rem;
            line-height: 1.7;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
        }
        /* Hero */
        .hero-bg {
            background: linear-gradient(135deg, #f0f4ff 0%, #f5f3ff 50%, #ecfdf5 100%);
            position: relative;
            overflow: hidden;
        }
        .hero-bg::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.07) 0%, transparent 70%);
            pointer-events: none;
        }
        /* Steps */
        .step-item {
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            padding: 1.5rem;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .step-item:hover {
            border-color: var(--primary-light);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
        }
        .step-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 9999px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }
        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 1.25rem 0;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            padding: 0.25rem 0;
            user-select: none;
        }
        .faq-question i {
            color: var(--text-muted);
            transition: transform 0.3s ease;
            font-size: 1rem;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            padding: 0 0 0 0;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0.75rem 0 0.25rem 0;
        }
        /* Footer */
        .footer-heading {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .footer-link {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-link:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        /* Mobile nav */
        .mobile-nav-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.3);
            z-index: 50;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        .mobile-nav-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav-panel {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100%;
            background: #fff;
            z-index: 51;
            box-shadow: -8px 0 30px rgba(0, 0, 0, 0.1);
            padding: 2rem 1.5rem;
            transition: right 0.35s cubic-bezier(0.22, 1, 0.36, 1);
            display: flex;
            flex-direction: column;
        }
        .mobile-nav-panel.open {
            right: 0;
        }
        .mobile-nav-panel .close-btn {
            align-self: flex-end;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-soft);
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 1.2rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .mobile-nav-panel .close-btn:hover {
            background: var(--border-color);
        }
        .mobile-nav-panel .mobile-nav-link {
            display: block;
            padding: 0.75rem 0;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .mobile-nav-panel .mobile-nav-link:hover,
        .mobile-nav-panel .mobile-nav-link.active {
            color: var(--primary);
        }
        .mobile-nav-panel .mobile-nav-link.active {
            font-weight: 700;
        }
        /* Responsive */
        @media (max-width: 768px) {
            .desktop-nav {
                display: none !important;
            }
            .mobile-toggle {
                display: flex !important;
            }
            .hero-bg {
                padding-top: 2rem;
                padding-bottom: 2rem;
            }
        }
        @media (min-width: 769px) {
            .mobile-toggle {
                display: none !important;
            }
            .mobile-nav-overlay,
            .mobile-nav-panel {
                display: none !important;
            }
        }
        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-fade-in-up {
            animation: fadeInUp 0.6s ease forwards;
        }
        .animate-fade-in-up-d1 {
            animation-delay: 0.1s;
        }
        .animate-fade-in-up-d2 {
            animation-delay: 0.2s;
        }
        .animate-fade-in-up-d3 {
            animation-delay: 0.3s;
        }
        .animate-fade-in-up-d4 {
            animation-delay: 0.4s;
        }
        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-soft);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-muted);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-secondary);
        }
        /* Focus visible */
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        /* Utility */
        .bg-soft {
            background: var(--bg-soft);
        }
        .text-gradient {
            background: linear-gradient(135deg, #2563eb, #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .border-gradient {
            border-image: linear-gradient(135deg, #2563eb, #7c3aed) 1;
        }