/* roulang page: index */
:root {
            --color-primary: #0A2647;
            --color-secondary: #00D4FF;
            --color-accent: #FFC300;
            --color-bg: #0B1C2F;
            --color-bg-alt: #0A2647;
            --color-text: #F1F5F9;
            --color-text-dim: #94A3B8;
            --color-border: rgba(255, 255, 255, 0.12);
            --color-glass-bg: rgba(255, 255, 255, 0.06);
            --color-glass-border: rgba(255, 255, 255, 0.15);
            --radius-card: 1rem;
            --radius-btn: 0.5rem;
            --radius-full: 9999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.4);
            --transition-base: all 0.3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        .glass-card {
            background: var(--color-glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }
        .glass-card:hover {
            box-shadow: 0 12px 48px rgba(0, 212, 255, 0.15);
            border-color: rgba(0, 212, 255, 0.4);
            transform: translateY(-4px);
        }
        .btn-glow {
            padding: 0.75rem 2rem;
            border-radius: var(--radius-btn);
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, #00D4FF, #0088FF);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            cursor: pointer;
        }
        .btn-glow:hover {
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.8);
            transform: translateY(-2px);
        }
        .btn-glow:active {
            transform: translateY(0);
        }
        .btn-outline {
            padding: 0.75rem 2rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            cursor: pointer;
            background: transparent;
        }
        .btn-outline:hover {
            border-color: var(--color-secondary);
            background: rgba(0, 212, 255, 0.1);
        }
        .badge {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .badge-accent {
            background: rgba(255, 195, 0, 0.2);
            color: var(--color-accent);
        }
        .badge-secondary {
            background: rgba(0, 212, 255, 0.15);
            color: var(--color-secondary);
        }
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 0.5rem;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            text-align: center;
            color: var(--color-text-dim);
            max-width: 640px;
            margin: 0 auto 3rem auto;
            font-size: 1.125rem;
        }
        .section-padding {
            padding: 5rem 0;
        }

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            transition: background 0.4s ease, box-shadow 0.4s ease;
            padding: 0.75rem 0;
        }
        .site-header.scrolled {
            background: rgba(11, 28, 47, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
        }
        .nav-logo img,
        .nav-logo svg {
            width: 28px;
            height: 28px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.8);
            position: relative;
            padding-bottom: 4px;
            transition: color 0.3s;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-secondary);
            transition: width 0.3s ease;
            border-radius: 2px;
        }
        .nav-links a:hover {
            color: #fff;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            width: 100%;
            background: var(--color-secondary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1.25rem;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-full);
            padding: 0.4rem 1rem 0.4rem 1.25rem;
            transition: var(--transition-base);
            min-width: 180px;
        }
        .nav-search:focus-within {
            border-color: var(--color-secondary);
            background: rgba(255, 255, 255, 0.12);
        }
        .nav-search input {
            flex: 1;
            background: transparent;
            color: #fff;
            padding: 0.3rem 0;
            font-size: 0.875rem;
        }
        .nav-search input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .nav-search .search-icon {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.875rem;
        }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .nav-auth .login-link {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.9rem;
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-auth .login-link:hover {
            color: #fff;
        }
        .nav-auth .btn-glow-sm {
            padding: 0.45rem 1.25rem;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.85rem;
            color: #fff;
            background: linear-gradient(135deg, #00D4FF, #0088FF);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.4);
            transition: var(--transition-base);
            cursor: pointer;
        }
        .nav-auth .btn-glow-sm:hover {
            box-shadow: 0 0 32px rgba(0, 212, 255, 0.7);
            transform: translateY(-1px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: #fff;
            border-radius: 4px;
            transition: var(--transition-base);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: rgba(11, 28, 47, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 1.5rem 2rem;
            border-bottom: 1px solid var(--color-border);
            z-index: 40;
            flex-direction: column;
            gap: 1.25rem;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            font-size: 1.1rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.8);
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .mobile-menu a.active {
            color: var(--color-secondary);
        }

        /* Hero */
        .hero {
            min-height: 90vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, #0A2647 0%, #0B1C2F 50%, #0D2E5C 100%);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-bg-particles {
            position: absolute;
            inset: 0;
            overflow: hidden;
            pointer-events: none;
        }
        .hero-bg-particles span {
            position: absolute;
            width: 6px;
            height: 6px;
            background: rgba(0, 212, 255, 0.25);
            border-radius: 50%;
            animation: floatParticle 12s infinite ease-in-out;
        }
        @keyframes floatParticle {
            0%,
            100% {
                transform: translateY(0) scale(1);
                opacity: 0.2;
            }
            50% {
                transform: translateY(-40px) scale(1.6);
                opacity: 0.8;
            }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            padding: 2rem 0;
        }
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: #fff;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .hero h1 .highlight {
            background: linear-gradient(to right, #00D4FF, #FFC300);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: 1.35rem;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 1.25rem;
            line-height: 1.7;
            max-width: 600px;
        }
        .hero-actions {
            margin-top: 2.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255, 195, 0, 0.12);
            border: 1px solid rgba(255, 195, 0, 0.25);
            padding: 0.3rem 1rem;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            color: var(--color-accent);
            margin-bottom: 1.5rem;
        }

        /* Features */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }
        .feature-card {
            padding: 2.25rem 1.75rem;
            text-align: center;
            background: var(--color-glass-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-glass-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            border-radius: var(--radius-card);
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), transparent, rgba(255, 195, 0, 0.05));
            opacity: 0;
            transition: opacity 0.5s;
            z-index: 0;
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 16px 48px rgba(0, 212, 255, 0.15);
            border-color: rgba(0, 212, 255, 0.3);
        }
        .feature-card>* {
            position: relative;
            z-index: 1;
        }
        .feature-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            display: inline-block;
            width: 72px;
            height: 72px;
            line-height: 72px;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.1);
            color: var(--color-secondary);
            transition: var(--transition-base);
        }
        .feature-card:hover .feature-icon {
            transform: scale(1.1) rotate(4deg);
            background: rgba(0, 212, 255, 0.2);
        }
        .feature-card .num {
            font-size: 2rem;
            font-weight: 800;
            color: rgba(0, 212, 255, 0.2);
            position: absolute;
            top: 1rem;
            right: 1.25rem;
            font-family: 'Georgia', serif;
        }
        .feature-card h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: #fff;
        }
        .feature-card p {
            color: var(--color-text-dim);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* Scene Demo */
        .scene-section {
            background: linear-gradient(180deg, var(--color-bg) 0%, #0D2E5C 100%);
        }
        .scene-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .scene-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: var(--transition-base);
        }
        .scene-image:hover {
            box-shadow: 0 12px 48px rgba(0, 212, 255, 0.1);
        }
        .scene-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }
        .scene-text h2 {
            font-size: 2.25rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #fff;
        }
        .scene-text p {
            color: var(--color-text-dim);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 1.5rem;
        }
        .scene-text .scene-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-bottom: 1.75rem;
        }
        .scene-text .scene-tags span {
            padding: 0.3rem 1rem;
            border-radius: var(--radius-full);
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid rgba(0, 212, 255, 0.15);
            font-size: 0.8rem;
            color: var(--color-secondary);
        }

        /* Social Proof - Stats */
        .stats-section {
            background: var(--color-bg-alt);
            position: relative;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }
        .stat-item {
            padding: 1.5rem 0.5rem;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, #00D4FF, #FFC300);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.1;
        }
        .stat-label {
            color: var(--color-text-dim);
            font-size: 0.95rem;
            margin-top: 0.5rem;
        }
        .testimonial-scroll {
            margin-top: 3rem;
            display: flex;
            gap: 1.5rem;
            overflow-x: auto;
            padding-bottom: 1rem;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .testimonial-scroll::-webkit-scrollbar {
            height: 4px;
        }
        .testimonial-scroll::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 4px;
        }
        .testimonial-scroll::-webkit-scrollbar-thumb {
            background: var(--color-secondary);
            border-radius: 4px;
        }
        .testimonial-card {
            min-width: 300px;
            flex-shrink: 0;
            padding: 1.5rem;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            scroll-snap-align: start;
            transition: var(--transition-base);
        }
        .testimonial-card:hover {
            border-color: rgba(0, 212, 255, 0.3);
            background: rgba(255, 255, 255, 0.07);
        }
        .testimonial-card .quote {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            line-height: 1.6;
            font-style: italic;
            margin-bottom: 1rem;
        }
        .testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .testimonial-card .author .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
            color: #fff;
        }
        .testimonial-card .author .name {
            font-weight: 600;
            font-size: 0.9rem;
        }
        .testimonial-card .author .role {
            color: var(--color-text-dim);
            font-size: 0.75rem;
        }

        /* Latest News (CMS) */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .news-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: rgba(255, 195, 0, 0.4);
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
        }
        .news-card .news-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .news-card .news-body {
            padding: 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .news-body .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 0.5rem;
        }
        .news-card .news-body .news-cat {
            font-size: 0.7rem;
            padding: 0.15rem 0.6rem;
            border-radius: var(--radius-full);
            background: rgba(255, 195, 0, 0.15);
            color: var(--color-accent);
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .news-card .news-body .news-time {
            font-size: 0.75rem;
            color: var(--color-text-dim);
        }
        .news-card .news-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-body p {
            font-size: 0.85rem;
            color: var(--color-text-dim);
            line-height: 1.5;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.75rem;
        }
        .news-card .news-body .read-more {
            font-size: 0.8rem;
            color: var(--color-secondary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            transition: var(--transition-base);
        }
        .news-card .news-body .read-more:hover {
            gap: 0.6rem;
            color: #fff;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 3rem 1rem;
            color: var(--color-text-dim);
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-card);
            border: 1px dashed var(--color-border);
        }
        .news-empty i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            opacity: 0.4;
        }

        /* FAQ */
        .faq-section {
            background: var(--color-bg-alt);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            border-radius: 0.75rem;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.25rem 1.5rem;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: #fff;
            transition: var(--transition-base);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--color-secondary);
        }
        .faq-question .faq-toggle {
            font-size: 1.25rem;
            transition: transform 0.3s;
            color: var(--color-text-dim);
        }
        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(45deg);
            color: var(--color-secondary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 1.5rem;
            color: var(--color-text-dim);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.25rem 1.5rem;
        }

        /* CTA Banner */
        .cta-banner {
            background: linear-gradient(135deg, #0A2647, #0D2E5C);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 2rem;
            padding: 3rem 0;
        }
        .cta-text h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
        }
        .cta-text p {
            color: var(--color-text-dim);
            margin-top: 0.5rem;
            font-size: 1rem;
        }

        /* Sticky bottom bar */
        .sticky-bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 40;
            background: rgba(11, 28, 47, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--color-border);
            padding: 0.75rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            transform: translateY(100%);
            transition: transform 0.4s ease;
        }
        .sticky-bottom-bar.visible {
            transform: translateY(0);
        }
        .sticky-bottom-bar .bar-text {
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
        }
        .sticky-bottom-bar .bar-text .highlight {
            color: var(--color-accent);
        }
        .sticky-bottom-bar .bar-close {
            background: none;
            border: none;
            color: rgba(255, 255, 255, 0.5);
            font-size: 1.25rem;
            cursor: pointer;
            padding: 0.25rem;
            transition: color 0.3s;
        }
        .sticky-bottom-bar .bar-close:hover {
            color: #fff;
        }

        /* Footer */
        .site-footer {
            background: #071525;
            padding: 4rem 0 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 3rem;
            padding-bottom: 3rem;
        }
        .footer-brand .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }
        .footer-brand p {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1.25rem;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }
        .footer-col ul a {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            transition: color 0.3s;
        }
        .footer-col ul a:hover {
            color: var(--color-secondary);
        }
        .footer-col .contact-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            color: var(--color-text-dim);
            font-size: 0.9rem;
            margin-bottom: 0.6rem;
        }
        .footer-col .contact-item i {
            width: 1.25rem;
            color: var(--color-secondary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 1.5rem 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.85rem;
            color: var(--color-text-dim);
        }
        .footer-bottom a {
            color: var(--color-text-dim);
        }
        .footer-bottom a:hover {
            color: var(--color-secondary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 1.25rem;
            }
            .nav-search {
                min-width: 120px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .scene-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .hero h1 {
                font-size: 2.8rem;
            }
        }
        @media (max-width: 768px) {
            .nav-links,
            .nav-search,
            .nav-auth .login-link {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .nav-auth .btn-glow-sm {
                font-size: 0.75rem;
                padding: 0.35rem 1rem;
            }
            .hero {
                min-height: 80vh;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero-subtitle {
                font-size: 1.05rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 0.75rem;
            }
            .hero-actions .btn-glow,
            .hero-actions .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 2rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .stat-number {
                font-size: 2.25rem;
            }
            .scene-text h2 {
                font-size: 1.75rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .cta-inner {
                flex-direction: column;
                text-align: center;
                padding: 2rem 0;
            }
            .cta-text h2 {
                font-size: 1.5rem;
            }
            .sticky-bottom-bar {
                padding: 0.6rem 1rem;
            }
            .sticky-bottom-bar .bar-text {
                font-size: 0.85rem;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .testimonial-card {
                min-width: 260px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .news-card .news-img {
                height: 140px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .feature-card {
                padding: 1.75rem 1.25rem;
            }
        }

        /* A11y focus */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

/* roulang page: article */
:root {
            --color-primary: #0A2647;
            --color-secondary: #00D4FF;
            --color-accent: #FFC300;
            --color-bg: #0B1C2F;
            --color-bg-alt: #0F2A42;
            --color-text: #F0F4FA;
            --color-text-dim: #9BB0C8;
            --color-border: rgba(255, 255, 255, 0.12);
            --color-card-bg: rgba(255, 255, 255, 0.06);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-full: 50px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 24px rgba(0, 212, 255, 0.35);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(11, 28, 47, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(10, 38, 71, 0.96);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
            height: 68px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo svg {
            width: 30px;
            height: 30px;
            flex-shrink: 0;
        }

        .nav-logo span {
            background: linear-gradient(135deg, #fff 60%, var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 0.25rem;
            margin: 0 1rem;
        }

        .nav-links li a {
            padding: 0.5rem 1rem;
            border-radius: 8px;
            color: var(--color-text-dim);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-links li a.active {
            color: #fff;
            font-weight: 600;
        }

        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--color-secondary);
            border-radius: 4px;
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-shrink: 0;
        }

        .nav-search {
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search input {
            width: 180px;
            padding: 0.5rem 1rem 0.5rem 2.4rem;
            border-radius: var(--radius-full);
            border: 1px solid var(--color-border);
            background: rgba(255, 255, 255, 0.07);
            color: #fff;
            font-size: 0.875rem;
            transition: var(--transition);
            outline: none;
        }

        .nav-search input::placeholder {
            color: var(--color-text-dim);
            opacity: 0.7;
        }

        .nav-search input:focus {
            border-color: var(--color-secondary);
            background: rgba(255, 255, 255, 0.12);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.15);
            width: 220px;
        }

        .nav-search .search-icon {
            position: absolute;
            left: 0.85rem;
            color: var(--color-text-dim);
            font-size: 0.85rem;
            pointer-events: none;
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }

        .login-link {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }

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

        .btn-glow-sm {
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.875rem;
            color: #fff;
            background: linear-gradient(135deg, #00D4FF, #0088FF);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.35);
            transition: var(--transition);
            white-space: nowrap;
            border: none;
        }

        .btn-glow-sm:hover {
            box-shadow: 0 0 32px rgba(0, 212, 255, 0.55);
            transform: translateY(-1px);
        }

        .btn-glow-sm:active {
            transform: scale(0.97);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 4px;
            transition: var(--transition);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(10, 38, 71, 0.98);
            backdrop-filter: blur(18px);
            border-top: 1px solid var(--color-border);
            padding: 0.5rem 1.5rem 1.2rem;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .mobile-menu.open {
            max-height: 400px;
        }

        .mobile-menu a {
            padding: 0.7rem 0;
            color: var(--color-text-dim);
            font-size: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: var(--transition);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: #fff;
        }

        .mobile-menu a:last-child {
            border-bottom: none;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-section {
            padding-top: 100px;
            padding-bottom: 1rem;
            background: linear-gradient(180deg, rgba(10, 38, 71, 0.5), transparent);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: var(--color-text-dim);
        }

        .breadcrumb a {
            color: var(--color-text-dim);
            transition: var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--color-secondary);
        }

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.2);
            font-size: 0.75rem;
        }

        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 2rem 0 4rem;
            flex: 1;
        }

        .article-wrapper {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 3rem;
            align-items: start;
        }

        .article-content-area {
            background: var(--color-card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 2.5rem 2.8rem;
            box-shadow: var(--shadow-card);
        }

        .article-header {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--color-border);
        }

        .article-header .article-category {
            display: inline-block;
            padding: 0.25rem 0.9rem;
            border-radius: var(--radius-full);
            font-size: 0.78rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, #00D4FF, #0088FF);
            margin-bottom: 1rem;
            letter-spacing: 0.3px;
        }

        .article-header h1 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: -0.3px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: var(--color-text-dim);
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }

        .article-meta .meta-item i {
            font-size: 0.8rem;
            color: var(--color-secondary);
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: rgba(240, 244, 250, 0.92);
        }

        .article-body p {
            margin-bottom: 1.4rem;
        }

        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 2rem 0 1rem;
            color: #fff;
            line-height: 1.3;
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 1.5rem 0 0.8rem;
            color: #fff;
            line-height: 1.4;
        }

        .article-body blockquote {
            border-left: 4px solid var(--color-secondary);
            background: rgba(0, 212, 255, 0.06);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 12px 12px 0;
            color: var(--color-text-dim);
            font-style: italic;
        }

        .article-body ul,
        .article-body ol {
            margin: 1rem 0 1.5rem;
            padding-left: 1.8rem;
            color: rgba(240, 244, 250, 0.92);
        }

        .article-body li {
            margin-bottom: 0.5rem;
        }

        .article-body img {
            border-radius: 12px;
            margin: 1.8rem auto;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
        }

        .article-body a {
            color: var(--color-secondary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-body a:hover {
            color: #fff;
        }

        .article-body .wp-block-table,
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 12px;
            overflow: hidden;
        }

        .article-body table th,
        .article-body table td {
            padding: 0.75rem 1rem;
            border: 1px solid var(--color-border);
            text-align: left;
        }

        .article-body table th {
            background: rgba(0, 212, 255, 0.1);
            color: var(--color-secondary);
            font-weight: 600;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .sidebar-card {
            background: var(--color-card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 1.5rem 1.6rem;
            box-shadow: var(--shadow-card);
        }

        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            padding-bottom: 0.6rem;
            border-bottom: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sidebar-card h3 i {
            color: var(--color-secondary);
        }

        .sidebar-card ul {
            list-style: none;
        }

        .sidebar-card ul li {
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .sidebar-card ul li:last-child {
            border-bottom: none;
        }

        .sidebar-card ul li a {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .sidebar-card ul li a:hover {
            color: var(--color-secondary);
            padding-left: 4px;
        }

        .sidebar-card ul li a .tag-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-secondary);
            flex-shrink: 0;
            opacity: 0.4;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.12), rgba(0, 136, 255, 0.08));
            border-color: rgba(0, 212, 255, 0.25);
            text-align: center;
        }

        .sidebar-cta h3 {
            border-bottom: none;
            justify-content: center;
        }

        .sidebar-cta p {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            margin-bottom: 1.2rem;
        }

        .sidebar-cta .btn-glow-sm {
            display: inline-block;
            padding: 0.6rem 2rem;
            font-size: 0.95rem;
        }

        /* ===== Not Found ===== */
        .not-found-area {
            text-align: center;
            padding: 5rem 2rem;
            background: var(--color-card-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }

        .not-found-area .icon-big {
            font-size: 4rem;
            color: var(--color-text-dim);
            opacity: 0.3;
            margin-bottom: 1.5rem;
        }

        .not-found-area h2 {
            font-size: 1.6rem;
            color: #fff;
            margin-bottom: 0.8rem;
        }

        .not-found-area p {
            color: var(--color-text-dim);
            margin-bottom: 1.8rem;
        }

        .not-found-area .back-link {
            display: inline-block;
            padding: 0.6rem 2rem;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, #00D4FF, #0088FF);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-glow);
            transition: var(--transition);
        }

        .not-found-area .back-link:hover {
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.5);
            transform: translateY(-2px);
        }

        /* ===== Related Articles ===== */
        .related-section {
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 1px solid var(--color-border);
        }

        .related-section h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }

        .related-section h3 i {
            color: var(--color-secondary);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.2rem;
        }

        .related-card {
            background: var(--color-card-bg);
            border: 1px solid var(--color-border);
            border-radius: 12px;
            padding: 1rem 1.2rem;
            transition: var(--transition);
            display: block;
        }

        .related-card:hover {
            border-color: rgba(0, 212, 255, 0.3);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.3);
        }

        .related-card .related-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.4rem;
            line-height: 1.4;
        }

        .related-card .related-meta {
            font-size: 0.78rem;
            color: var(--color-text-dim);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: linear-gradient(180deg, rgba(10, 38, 71, 0.9), rgba(6, 20, 40, 0.98));
            border-top: 1px solid var(--color-border);
            padding: 3.5rem 0 0;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1.4fr;
            gap: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid var(--color-border);
        }

        .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.8rem;
        }

        .footer-brand p {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            position: relative;
            padding-bottom: 0.5rem;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2.5px;
            background: var(--color-secondary);
            border-radius: 4px;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 0.5rem;
        }

        .footer-col ul li a {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--color-secondary);
            padding-left: 3px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: var(--color-text-dim);
            font-size: 0.9rem;
            margin-bottom: 0.6rem;
        }

        .contact-item i {
            color: var(--color-secondary);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.8rem;
            padding: 1.2rem 0;
            font-size: 0.8rem;
            color: var(--color-text-dim);
        }

        .footer-bottom a {
            color: var(--color-text-dim);
            transition: var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--color-secondary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-wrapper {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.2rem;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .nav-auth .login-link,
            .nav-auth span {
                display: none;
            }

            .nav-search input {
                width: 140px;
            }

            .nav-search input:focus {
                width: 160px;
            }

            .hamburger {
                display: flex;
            }

            .mobile-menu {
                display: flex;
            }

            .nav-actions {
                gap: 0.6rem;
            }

            .article-content-area {
                padding: 1.5rem 1.2rem;
            }

            .article-header h1 {
                font-size: 1.5rem;
            }

            .article-body {
                font-size: 0.98rem;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .breadcrumb-section {
                padding-top: 84px;
            }
        }

        @media (max-width: 520px) {
            .nav-container {
                padding: 0 1rem;
                height: 60px;
            }

            .nav-logo {
                font-size: 1.15rem;
            }

            .nav-logo svg {
                width: 24px;
                height: 24px;
            }

            .nav-search input {
                width: 100px;
                padding: 0.4rem 0.8rem 0.4rem 2rem;
                font-size: 0.8rem;
            }

            .nav-search input:focus {
                width: 120px;
            }

            .btn-glow-sm {
                padding: 0.4rem 1rem;
                font-size: 0.78rem;
            }

            .article-content-area {
                padding: 1.2rem 1rem;
            }

            .article-header h1 {
                font-size: 1.3rem;
            }

            .article-meta {
                gap: 0.8rem;
                font-size: 0.78rem;
            }

            .article-body {
                font-size: 0.92rem;
                line-height: 1.7;
            }

            .article-body h2 {
                font-size: 1.25rem;
            }

            .article-body h3 {
                font-size: 1.05rem;
            }

            .breadcrumb-section {
                padding-top: 76px;
            }

            .not-found-area {
                padding: 3rem 1rem;
            }

            .not-found-area h2 {
                font-size: 1.2rem;
            }
        }

/* roulang page: category1 */
/* ===================== Design Variables ===================== */
        :root {
            --color-primary: #0A2647;
            --color-primary-light: #0F3460;
            --color-secondary: #00D4FF;
            --color-secondary-dark: #0088FF;
            --color-accent: #FFC300;
            --color-bg: #0B1C2F;
            --color-bg-card: rgba(255, 255, 255, 0.06);
            --color-border: rgba(255, 255, 255, 0.12);
            --color-text: #F0F4F8;
            --color-text-dim: #9CA3AF;
            --color-text-muted: #6B7280;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-full: 50px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.5);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1280px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
        }

        /* ===================== Reset & Base ===================== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-sans);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            font-size: 1rem;
            min-height: 100vh;
            background: linear-gradient(135deg, #0B1C2F 0%, #0A2647 50%, #0F3460 100%);
            background-attachment: fixed;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }
        ul {
            list-style: none;
        }

        /* ===================== Container ===================== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ===================== Header / Nav ===================== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 38, 71, 0.7);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 38, 71, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
            height: 68px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.35rem;
            color: #fff;
            flex-shrink: 0;
            transition: opacity var(--transition);
        }
        .nav-logo:hover {
            opacity: 0.9;
        }
        .nav-logo svg {
            width: 28px;
            height: 28px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            margin: 0 1.5rem;
        }
        .nav-links a {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.25rem 0;
            position: relative;
            transition: color var(--transition);
            white-space: nowrap;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-secondary);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .nav-links a:hover {
            color: #fff;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            width: 100%;
            background: var(--color-secondary);
            box-shadow: 0 0 8px rgba(0, 212, 255, 0.6);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            flex-shrink: 0;
        }
        .nav-search {
            position: relative;
            display: flex;
            align-items: center;
        }
        .nav-search input {
            width: 180px;
            padding: 0.5rem 1rem 0.5rem 2.4rem;
            border-radius: var(--radius-full);
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: #fff;
            font-size: 0.875rem;
            transition: border-color var(--transition), background var(--transition);
        }
        .nav-search input::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }
        .nav-search input:focus {
            border-color: var(--color-secondary);
            background: rgba(255, 255, 255, 0.12);
            outline: none;
        }
        .nav-search .search-icon {
            position: absolute;
            left: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.85rem;
            pointer-events: none;
        }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .login-link {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.9rem;
            font-weight: 500;
            transition: color var(--transition);
        }
        .login-link:hover {
            color: #fff;
        }
        .btn-glow-sm {
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 0.85rem;
            cursor: pointer;
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.35);
            transition: box-shadow var(--transition), transform var(--transition);
            white-space: nowrap;
        }
        .btn-glow-sm:hover {
            box-shadow: 0 0 28px rgba(0, 212, 255, 0.55);
            transform: translateY(-1px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            cursor: pointer;
            padding: 4px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(10, 38, 71, 0.98);
            backdrop-filter: blur(20px);
            padding: 1rem 1.5rem 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-menu a {
            padding: 0.75rem 0;
            color: rgba(255, 255, 255, 0.75);
            font-size: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: color var(--transition);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--color-secondary);
        }
        .mobile-menu a:last-child {
            border-bottom: none;
        }
        @media (max-width: 900px) {
            .nav-links {
                display: none;
            }
            .nav-search input {
                width: 130px;
            }
            .nav-auth .login-link,
            .nav-auth span {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu.open {
                display: flex;
            }
        }
        @media (max-width: 520px) {
            .nav-container {
                padding: 0 1rem;
                height: 60px;
            }
            .nav-logo {
                font-size: 1.1rem;
            }
            .nav-logo svg {
                width: 24px;
                height: 24px;
            }
            .nav-search input {
                width: 90px;
                padding: 0.4rem 0.6rem 0.4rem 2rem;
                font-size: 0.8rem;
            }
            .btn-glow-sm {
                padding: 0.4rem 0.9rem;
                font-size: 0.75rem;
            }
        }

        /* ===================== Hero ===================== */
        .hero-section {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 7rem 1.5rem 4rem;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 38, 71, 0.88) 0%, rgba(11, 28, 47, 0.75) 50%, rgba(15, 52, 96, 0.6) 100%);
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.08) 0%, transparent 60%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
            text-align: center;
            animation: heroFadeIn 1s ease-out;
        }
        @keyframes heroFadeIn {
            0% {
                opacity: 0;
                transform: translateY(30px);
            }
            100% {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .hero-content h1 {
            font-size: 3.2rem;
            font-weight: 700;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 1.2rem;
            letter-spacing: 0.5px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .hero-content h1 .highlight {
            color: var(--color-secondary);
            display: inline-block;
        }
        .hero-content p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            margin: 0 auto 2rem;
            line-height: 1.7;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.9rem 2.2rem;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.45);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.65);
            transform: translateY(-2px);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 2rem;
            border-radius: var(--radius-sm);
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-weight: 500;
            font-size: 1.05rem;
            cursor: pointer;
            transition: border-color var(--transition), background var(--transition), transform var(--transition);
        }
        .btn-secondary:hover {
            border-color: var(--color-secondary);
            background: rgba(0, 212, 255, 0.08);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .hero-section {
                min-height: 70vh;
                padding: 6rem 1rem 3rem;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .hero-content p {
                font-size: 1rem;
            }
            .btn-primary,
            .btn-secondary {
                padding: 0.75rem 1.6rem;
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.7rem;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
        }

        /* ===================== Section Common ===================== */
        .section-padding {
            padding: 5rem 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 3rem 0;
            }
        }
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 0.75rem;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--color-text-dim);
            font-size: 1.1rem;
            max-width: 620px;
            margin: 0 auto 3rem;
            line-height: 1.6;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
        }

        /* ===================== Glass Card ===================== */
        .glass-card {
            background: var(--color-bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 48px rgba(0, 212, 255, 0.15);
            border-color: rgba(0, 212, 255, 0.35);
        }

        /* ===================== Feature Cards ===================== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .feature-card {
            text-align: center;
            padding: 2.5rem 1.5rem;
        }
        .feature-card .icon-box {
            width: 64px;
            height: 64px;
            margin: 0 auto 1.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: rgba(0, 212, 255, 0.1);
            font-size: 1.8rem;
            color: var(--color-secondary);
            transition: background var(--transition), transform var(--transition);
        }
        .feature-card:hover .icon-box {
            background: rgba(0, 212, 255, 0.2);
            transform: scale(1.05);
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
            color: #fff;
        }
        .feature-card p {
            color: var(--color-text-dim);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .feature-card .step-num {
            display: inline-block;
            font-size: 2.8rem;
            font-weight: 700;
            color: rgba(0, 212, 255, 0.15);
            line-height: 1;
            margin-bottom: 0.5rem;
        }
        @media (max-width: 900px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 1.8rem 1.2rem;
            }
        }

        /* ===================== Scene / Two Columns ===================== */
        .scene-section {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .two-col-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .scene-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border);
            transition: transform var(--transition);
        }
        .scene-image:hover {
            transform: scale(1.01);
        }
        .scene-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            display: block;
        }
        .scene-text h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #fff;
        }
        .scene-text p {
            color: var(--color-text-dim);
            font-size: 1.05rem;
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }
        .scene-text .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            color: var(--color-secondary);
            font-weight: 500;
            font-size: 1rem;
            transition: gap var(--transition);
        }
        .scene-text .btn-link i {
            transition: transform var(--transition);
        }
        .scene-text .btn-link:hover i {
            transform: translateX(4px);
        }
        .scene-text .btn-link:hover {
            color: #fff;
        }
        @media (max-width: 820px) {
            .two-col-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .scene-image img {
                height: 260px;
            }
            .scene-text h2 {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .scene-image img {
                height: 200px;
            }
        }

        /* ===================== Stats / Social Proof ===================== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
        }
        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--color-secondary);
            line-height: 1.1;
        }
        .stat-item .stat-label {
            color: var(--color-text-dim);
            font-size: 0.95rem;
            margin-top: 0.4rem;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .stat-item .stat-number {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 420px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
        }

        /* ===================== Process / Flow ===================== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            counter-reset: step;
        }
        .process-card {
            counter-increment: step;
            text-align: center;
            padding: 2.5rem 1.5rem;
            position: relative;
        }
        .process-card::before {
            content: counter(step);
            position: absolute;
            top: 1rem;
            right: 1.5rem;
            font-size: 4rem;
            font-weight: 700;
            color: rgba(0, 212, 255, 0.08);
            line-height: 1;
            pointer-events: none;
        }
        .process-card .icon-box {
            width: 60px;
            height: 60px;
            margin: 0 auto 1.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 195, 0, 0.12);
            font-size: 1.6rem;
            color: var(--color-accent);
            transition: background var(--transition), transform var(--transition);
        }
        .process-card:hover .icon-box {
            background: rgba(255, 195, 0, 0.22);
            transform: scale(1.05);
        }
        .process-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            color: #fff;
        }
        .process-card p {
            color: var(--color-text-dim);
            font-size: 0.92rem;
            line-height: 1.6;
        }
        @media (max-width: 820px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.2rem;
            }
        }
        @media (max-width: 520px) {
            .process-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===================== FAQ ===================== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--color-bg-card);
            backdrop-filter: blur(8px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
        }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.2rem 1.5rem;
            background: none;
            color: #fff;
            font-size: 1rem;
            font-weight: 500;
            cursor: pointer;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-question i {
            color: var(--color-secondary);
            font-size: 0.85rem;
            transition: transform var(--transition);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--color-text-dim);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        @media (max-width: 640px) {
            .faq-question {
                padding: 1rem 1.2rem;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 1.2rem 1rem;
                font-size: 0.88rem;
            }
        }

        /* ===================== CTA ===================== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(0, 136, 255, 0.04));
            border-top: 1px solid rgba(0, 212, 255, 0.1);
            border-bottom: 1px solid rgba(0, 212, 255, 0.1);
        }
        .cta-box {
            text-align: center;
            padding: 2.5rem 2rem;
            background: var(--color-bg-card);
            backdrop-filter: blur(14px);
            border: 1px solid rgba(0, 212, 255, 0.15);
            border-radius: var(--radius-xl);
            max-width: 780px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: #fff;
        }
        .cta-box p {
            color: var(--color-text-dim);
            font-size: 1.05rem;
            margin-bottom: 1.8rem;
            max-width: 540px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-box .btn-primary {
            font-size: 1.1rem;
            padding: 1rem 2.5rem;
        }
        @media (max-width: 640px) {
            .cta-box h2 {
                font-size: 1.5rem;
            }
            .cta-box p {
                font-size: 0.92rem;
            }
            .cta-box .btn-primary {
                font-size: 0.95rem;
                padding: 0.8rem 1.8rem;
            }
        }

        /* ===================== Footer ===================== */
        .site-footer {
            background: rgba(10, 38, 71, 0.8);
            backdrop-filter: blur(12px);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 3.5rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 2.5rem;
        }
        .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.2rem;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-brand p {
            color: var(--color-text-dim);
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1.2rem;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 0.6rem;
        }
        .footer-col ul li a {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--color-secondary);
        }
        .contact-item {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: var(--color-text-dim);
            font-size: 0.9rem;
            margin-bottom: 0.6rem;
        }
        .contact-item i {
            width: 18px;
            color: var(--color-secondary);
            font-size: 0.85rem;
        }
        .footer-bottom {
            margin-top: 2.5rem;
            padding: 1.2rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
            color: var(--color-text-muted);
            font-size: 0.85rem;
        }
        .footer-bottom a {
            color: var(--color-text-muted);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--color-secondary);
        }
        @media (max-width: 820px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }

        /* ===================== Floating Bar ===================== */
        .floating-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 900;
            background: rgba(10, 38, 71, 0.88);
            backdrop-filter: blur(16px);
            border-top: 1px solid rgba(0, 212, 255, 0.12);
            padding: 0.8rem 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            transform: translateY(100%);
            opacity: 0;
            transition: transform 0.4s ease, opacity 0.4s ease;
        }
        .floating-bar.visible {
            transform: translateY(0);
            opacity: 1;
        }
        .floating-bar .bar-text {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 500;
        }
        .floating-bar .bar-text span {
            color: var(--color-accent);
        }
        .floating-bar .bar-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .floating-bar .bar-close {
            background: none;
            color: var(--color-text-dim);
            font-size: 1.2rem;
            cursor: pointer;
            padding: 0 0.25rem;
            transition: color var(--transition);
        }
        .floating-bar .bar-close:hover {
            color: #fff;
        }
        @media (max-width: 520px) {
            .floating-bar {
                padding: 0.6rem 1rem;
                flex-direction: column;
                text-align: center;
            }
            .floating-bar .bar-text {
                font-size: 0.85rem;
            }
        }

        /* ===================== Utility ===================== */
        .text-gradient {
            background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .gap-section {
            gap: 1.5rem;
        }
        .badge {
            display: inline-block;
            padding: 0.2rem 0.7rem;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(255, 195, 0, 0.15);
            color: var(--color-accent);
            border: 1px solid rgba(255, 195, 0, 0.2);
        }
        .badge-blue {
            background: rgba(0, 212, 255, 0.12);
            color: var(--color-secondary);
            border-color: rgba(0, 212, 255, 0.2);
        }

        /* ===================== Responsive fine-tune ===================== */
        @media (max-width: 480px) {
            .section-padding {
                padding: 2.5rem 0;
            }
            .container {
                padding: 0 0.85rem;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #0A2647;
            --color-secondary: #00D4FF;
            --color-accent: #FFC300;
            --color-bg: #0B1C2F;
            --color-bg-card: rgba(255, 255, 255, 0.08);
            --color-border: rgba(255, 255, 255, 0.15);
            --color-text: #f0f4f8;
            --color-text-dim: #9ca3af;
            --color-text-muted: #6b7280;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-search: 50px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.6);
            --transition: all 0.3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: var(--color-bg);
            background: linear-gradient(135deg, #0A2647 0%, #0B1C2F 50%, #0A2647 100%);
            color: var(--color-text);
            line-height: 1.6;
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
            background: transparent;
            color: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(10, 38, 71, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.4s ease;
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
            height: 64px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.5rem;
            color: #fff;
            flex-shrink: 0;
        }
        .nav-logo svg {
            width: 28px;
            height: 28px;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2rem;
            margin: 0;
            padding: 0;
        }
        .nav-links li a {
            color: rgba(255, 255, 255, 0.78);
            font-size: 1rem;
            font-weight: 500;
            padding: 0.25rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-links li a:hover,
        .nav-links li a:focus {
            color: #fff;
        }
        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-secondary);
            transition: width 0.3s ease;
            box-shadow: 0 0 8px var(--color-secondary);
        }
        .nav-links li a:hover::after,
        .nav-links li a:focus::after,
        .nav-links li a.active::after {
            width: 100%;
        }
        .nav-links li a.active {
            color: #fff;
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            flex-shrink: 0;
        }
        .nav-search {
            position: relative;
            display: flex;
            align-items: center;
        }
        .nav-search input {
            width: 180px;
            padding: 0.5rem 1rem 0.5rem 2.4rem;
            border-radius: var(--radius-search);
            background: rgba(255, 255, 255, 0.10);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: #fff;
            font-size: 0.875rem;
            transition: var(--transition);
        }
        .nav-search input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .nav-search input:focus {
            border-color: var(--color-secondary);
            background: rgba(255, 255, 255, 0.15);
            width: 220px;
        }
        .search-icon {
            position: absolute;
            left: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.875rem;
            pointer-events: none;
        }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .login-link {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .login-link:hover {
            color: #fff;
        }
        .btn-glow-sm {
            padding: 0.45rem 1.25rem;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 0.85rem;
            color: #fff;
            background: linear-gradient(135deg, #00D4FF, #0088FF);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.45);
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }
        .btn-glow-sm:hover {
            box-shadow: 0 0 28px rgba(0, 212, 255, 0.7);
            transform: translateY(-1px);
        }
        .btn-glow-sm:active {
            transform: translateY(1px);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 4px;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(10, 38, 71, 0.96);
            backdrop-filter: blur(12px);
            padding: 1rem 1.5rem 1.5rem;
            gap: 0.75rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-menu a {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            padding: 0.5rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .mobile-menu a.active {
            color: var(--color-secondary);
            font-weight: 600;
        }
        .mobile-menu a:last-child {
            border-bottom: none;
        }
        /* ===== Buttons ===== */
        .btn-primary-glow {
            display: inline-block;
            padding: 0.85rem 2.2rem;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
            background: linear-gradient(135deg, #00D4FF, #0088FF);
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.5);
            transition: var(--transition);
            cursor: pointer;
            border: none;
            text-align: center;
        }
        .btn-primary-glow:hover {
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.75);
            transform: translateY(-2px);
        }
        .btn-primary-glow:active {
            transform: translateY(1px);
        }
        .btn-outline {
            display: inline-block;
            padding: 0.8rem 2rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 1rem;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            background: transparent;
            transition: var(--transition);
            cursor: pointer;
            text-align: center;
        }
        .btn-outline:hover {
            border-color: var(--color-secondary);
            color: var(--color-secondary);
            background: rgba(0, 212, 255, 0.08);
        }
        /* ===== Glass Card ===== */
        .glass-card {
            background: var(--color-bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 1.75rem;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .glass-card:hover {
            box-shadow: 0 12px 48px rgba(0, 212, 255, 0.15);
            border-color: rgba(0, 212, 255, 0.4);
            transform: translateY(-4px);
        }
        /* ===== Section Spacing ===== */
        .section-padding {
            padding: 5rem 0;
        }
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            color: #fff;
        }
        .section-subtitle {
            font-size: 1.125rem;
            color: var(--color-text-dim);
            max-width: 680px;
            margin: 0 auto 2.5rem auto;
            text-align: center;
        }
        .text-center {
            text-align: center;
        }
        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 0.25rem 1rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(255, 195, 0, 0.18);
            color: var(--color-accent);
            border: 1px solid rgba(255, 195, 0, 0.25);
        }
        .badge-blue {
            background: rgba(0, 212, 255, 0.15);
            color: var(--color-secondary);
            border-color: rgba(0, 212, 255, 0.25);
        }
        /* ===== Step / Number ===== */
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(0, 136, 255, 0.2));
            color: var(--color-secondary);
            font-size: 1.25rem;
            font-weight: 800;
            border: 1px solid rgba(0, 212, 255, 0.3);
            flex-shrink: 0;
        }
        /* ===== FAQ ===== */
        .faq-item {
            background: var(--color-bg-card);
            backdrop-filter: blur(8px);
            border: 1px solid var(--color-border);
            border-radius: 12px;
            padding: 1.25rem 1.5rem;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.25);
        }
        .faq-item summary {
            font-weight: 600;
            font-size: 1.05rem;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--color-secondary);
            transition: transform 0.3s ease;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            margin-top: 1rem;
            color: var(--color-text-dim);
            line-height: 1.7;
            padding-top: 0.75rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        /* ===== Stats ===== */
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-number .accent {
            color: var(--color-secondary);
        }
        .stat-label {
            color: var(--color-text-dim);
            font-size: 0.95rem;
            margin-top: 0.3rem;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: rgba(0, 0, 0, 0.35);
            backdrop-filter: blur(10px);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 3.5rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }
        .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .footer-brand p {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col ul li a {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--color-secondary);
        }
        .contact-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--color-text-dim);
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }
        .contact-item i {
            width: 1.2rem;
            color: var(--color-secondary);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            color: var(--color-text-muted);
            font-size: 0.85rem;
            gap: 0.75rem;
        }
        .footer-bottom a {
            color: var(--color-text-muted);
            transition: var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--color-secondary);
        }
        /* ===== Hero ===== */
        .hero-section {
            min-height: 65vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 38, 71, 0.88) 0%, rgba(11, 28, 47, 0.78) 100%);
            z-index: 1;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        /* ===== Vintage accent touches ===== */
        .vintage-border {
            border: 1px solid rgba(255, 195, 0, 0.15);
            box-shadow: inset 0 0 30px rgba(255, 195, 0, 0.03);
        }
        .vintage-label {
            font-family: 'Georgia', 'Times New Roman', serif;
            letter-spacing: 0.03em;
            color: var(--color-accent);
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 1.2rem;
            }
            .nav-search input {
                width: 140px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-auth .login-link,
            .nav-auth span {
                display: none;
            }
            .nav-auth .btn-glow-sm {
                display: none;
            }
            .nav-search input {
                width: 130px;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu.open {
                display: flex;
            }
            .hero-section {
                min-height: 55vh;
            }
            .section-title {
                font-size: 1.75rem;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .stat-number {
                font-size: 2.2rem;
            }
            .container {
                padding: 0 1rem;
            }
        }
        @media (max-width: 520px) {
            .nav-search input {
                width: 100px;
                padding: 0.4rem 0.8rem 0.4rem 2rem;
                font-size: 0.8rem;
            }
            .nav-container {
                padding: 0 0.75rem;
                height: 58px;
            }
            .nav-logo {
                font-size: 1.2rem;
            }
            .nav-logo svg {
                width: 22px;
                height: 22px;
            }
            .hero-section {
                min-height: 50vh;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .btn-primary-glow {
                padding: 0.7rem 1.5rem;
                font-size: 0.9rem;
            }
            .btn-outline {
                padding: 0.65rem 1.4rem;
                font-size: 0.85rem;
            }
            .glass-card {
                padding: 1.25rem;
            }
            .step-number {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }
        /* ===== Utilities ===== */
        .gap-6 {
            gap: 1.5rem;
        }
        .gap-8 {
            gap: 2rem;
        }
        .mt-4 {
            margin-top: 1rem;
        }
        .mt-6 {
            margin-top: 1.5rem;
        }
        .mt-8 {
            margin-top: 2rem;
        }
        .mt-10 {
            margin-top: 2.5rem;
        }
        .mb-4 {
            margin-bottom: 1rem;
        }
        .mb-6 {
            margin-bottom: 1.5rem;
        }
        .mb-8 {
            margin-bottom: 2rem;
        }
        .flex {
            display: flex;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .items-center {
            align-items: center;
        }
        .justify-center {
            justify-content: center;
        }
        .justify-between {
            justify-content: space-between;
        }
        .grid {
            display: grid;
        }
        .grid-cols-1 {
            grid-template-columns: 1fr;
        }
        .grid-cols-2 {
            grid-template-columns: 1fr 1fr;
        }
        .grid-cols-3 {
            grid-template-columns: 1fr 1fr 1fr;
        }
        .gap-4 {
            gap: 1rem;
        }
        .gap-6 {
            gap: 1.5rem;
        }
        .gap-8 {
            gap: 2rem;
        }
        .text-dim {
            color: var(--color-text-dim);
        }
        .text-accent {
            color: var(--color-accent);
        }
        .text-secondary {
            color: var(--color-secondary);
        }
        .text-center {
            text-align: center;
        }
        .mx-auto {
            margin-left: auto;
            margin-right: auto;
        }
        .max-w-2xl {
            max-width: 42rem;
        }
        .max-w-3xl {
            max-width: 48rem;
        }
        .max-w-4xl {
            max-width: 56rem;
        }
        .w-full {
            width: 100%;
        }
        .relative {
            position: relative;
        }
        .overflow-hidden {
            overflow: hidden;
        }
        .rounded-2xl {
            border-radius: 16px;
        }
        .rounded-xl {
            border-radius: 12px;
        }
        .shadow-xl {
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
        }
        .object-cover {
            object-fit: cover;
        }
        .bg-white\\/5 {
            background: rgba(255, 255, 255, 0.05);
        }
        .border-white\\/10 {
            border-color: rgba(255, 255, 255, 0.10);
        }
        .hover\\:border-secondary:hover {
            border-color: var(--color-secondary);
        }
        .transition {
            transition: var(--transition);
        }
        .duration-300 {
            transition-duration: 0.3s;
        }
        @media (min-width: 768px) {
            .md\\:grid-cols-2 {
                grid-template-columns: 1fr 1fr;
            }
            .md\\:grid-cols-3 {
                grid-template-columns: 1fr 1fr 1fr;
            }
            .md\\:flex {
                display: flex;
            }
            .md\\:text-left {
                text-align: left;
            }
            .md\\:gap-8 {
                gap: 2rem;
            }
        }
        @media (min-width: 1024px) {
            .lg\\:grid-cols-3 {
                grid-template-columns: 1fr 1fr 1fr;
            }
            .lg\\:grid-cols-4 {
                grid-template-columns: 1fr 1fr 1fr 1fr;
            }
        }
        /* smooth hover for cards */
        .hover-lift {
            transition: var(--transition);
        }
        .hover-lift:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 48px rgba(0, 212, 255, 0.12);
        }
        /* breadcrumb */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.6rem;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            margin-bottom: 1.5rem;
        }
        .breadcrumb a {
            color: var(--color-text-dim);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--color-secondary);
        }
        .breadcrumb span {
            color: var(--color-text-muted);
        }
        .breadcrumb .current {
            color: var(--color-text);
        }
        /* data grid */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        @media (max-width: 640px) {
            .data-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
        }
        /* gear card image placeholder style */
        .gear-img-wrap {
            border-radius: 12px;
            overflow: hidden;
            height: 200px;
            background: rgba(255, 255, 255, 0.04);
        }
        .gear-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .gear-img-wrap:hover img {
            transform: scale(1.05);
        }

/* roulang page: category3 */
:root {
            --color-primary: #0A2647;
            --color-secondary: #00D4FF;
            --color-accent: #FFC300;
            --color-bg: #0B1C2F;
            --color-bg-alt: #0A2647;
            --color-text: #f0f4f8;
            --color-text-dim: #9ca3af;
            --color-border: rgba(255, 255, 255, 0.12);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-full: 50px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.4);
            --transition: all 0.3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            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;
            outline: none;
            border: none;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 1rem;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: rgba(11, 28, 47, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 38, 71, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
            height: 68px;
            gap: 1rem;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            flex-shrink: 0;
        }
        .nav-logo svg {
            width: 28px;
            height: 28px;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 0.25rem;
            align-items: center;
        }
        .nav-links li a {
            padding: 0.5rem 1rem;
            border-radius: 6px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .nav-links li a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-links li a.active {
            color: var(--color-secondary);
            background: rgba(0, 212, 255, 0.1);
        }
        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--color-secondary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-shrink: 0;
        }
        .nav-search {
            position: relative;
            display: flex;
            align-items: center;
        }
        .nav-search input {
            width: 180px;
            padding: 0.5rem 1rem 0.5rem 2.4rem;
            border-radius: var(--radius-full);
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--color-border);
            color: #fff;
            font-size: 0.875rem;
            transition: var(--transition);
        }
        .nav-search input::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }
        .nav-search input:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.15);
            width: 220px;
        }
        .search-icon {
            position: absolute;
            left: 12px;
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.85rem;
            pointer-events: none;
        }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .login-link {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .login-link:hover {
            color: var(--color-secondary);
        }
        .btn-glow-sm {
            padding: 0.45rem 1.2rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.85rem;
            color: #fff;
            background: linear-gradient(135deg, #00D4FF, #0088FF);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.35);
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }
        .btn-glow-sm:hover {
            box-shadow: 0 0 28px rgba(0, 212, 255, 0.6);
            transform: scale(1.03);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 4px;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2.5px;
            border-radius: 2px;
            background: #fff;
            transition: var(--transition);
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(10, 38, 71, 0.98);
            backdrop-filter: blur(12px);
            padding: 1rem 1.5rem 1.5rem;
            border-top: 1px solid var(--color-border);
        }
        .mobile-menu a {
            padding: 0.75rem 0;
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: var(--transition);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--color-secondary);
        }
        .mobile-menu a:last-child {
            border-bottom: none;
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-search input {
                width: 140px;
            }
            .nav-search input:focus {
                width: 160px;
            }
            .hamburger {
                display: flex;
            }
            .nav-auth .login-link,
            .nav-auth span {
                display: none;
            }
            .nav-auth .btn-glow-sm {
                display: none;
            }
            .mobile-menu.open {
                display: flex;
            }
        }
        @media (max-width: 640px) {
            .nav-container {
                padding: 0 1rem;
                height: 60px;
            }
            .nav-logo {
                font-size: 1.15rem;
            }
            .nav-search input {
                width: 100px;
                padding: 0.4rem 0.8rem 0.4rem 2rem;
                font-size: 0.8rem;
            }
            .nav-search input:focus {
                width: 130px;
            }
            .search-icon {
                left: 8px;
                font-size: 0.75rem;
            }
        }

        /* ===== Shared Components ===== */
        .section-padding {
            padding: 5rem 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 3rem 0;
            }
        }
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 0.75rem;
            color: #fff;
        }
        .section-subtitle {
            text-align: center;
            color: var(--color-text-dim);
            font-size: 1.05rem;
            max-width: 640px;
            margin: 0 auto 3rem;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
        }

        /* Glass card */
        .glass-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-card);
            padding: 1.75rem;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
        }
        .glass-card:hover {
            border-color: rgba(0, 212, 255, 0.4);
            box-shadow: 0 12px 48px rgba(0, 212, 255, 0.12);
            transform: translateY(-4px);
        }

        /* Glow button */
        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 2.2rem;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 1rem;
            color: #fff;
            background: linear-gradient(135deg, #00D4FF, #0088FF);
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.45);
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }
        .btn-glow:hover {
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.7);
            transform: scale(1.03);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 2.2rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 1rem;
            color: #fff;
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.3);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline:hover {
            border-color: var(--color-secondary);
            background: rgba(0, 212, 255, 0.08);
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
        }

        /* Badge / Tag */
        .badge {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(255, 195, 0, 0.15);
            color: var(--color-accent);
            border: 1px solid rgba(255, 195, 0, 0.25);
        }
        .badge-blue {
            background: rgba(0, 212, 255, 0.12);
            color: var(--color-secondary);
            border-color: rgba(0, 212, 255, 0.25);
        }
        .badge-green {
            background: rgba(52, 211, 153, 0.12);
            color: #34d399;
            border-color: rgba(52, 211, 153, 0.25);
        }

        /* Stat number */
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--color-border);
            padding: 1.25rem 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: #fff;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            padding: 0.25rem 0;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--color-secondary);
        }
        .faq-question .icon {
            font-size: 1.2rem;
            transition: transform 0.3s;
            color: var(--color-text-dim);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            color: var(--color-text-dim);
            line-height: 1.7;
            padding: 0 0.5rem 0 0;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 0.75rem;
        }
        .faq-question .icon.rotated {
            transform: rotate(45deg);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: rgba(10, 38, 71, 0.8);
            backdrop-filter: blur(12px);
            border-top: 1px solid var(--color-border);
            padding: 3.5rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 2.5rem;
        }
        .footer-brand .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .footer-brand p {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul li a {
            color: var(--color-text-dim);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--color-secondary);
        }
        .contact-item {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            color: var(--color-text-dim);
            font-size: 0.9rem;
            margin-bottom: 0.6rem;
        }
        .contact-item i {
            width: 18px;
            color: var(--color-secondary);
        }
        .footer-bottom {
            margin-top: 2.5rem;
            padding: 1.2rem 0;
            border-top: 1px solid var(--color-border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.8rem;
            font-size: 0.8rem;
            color: var(--color-text-dim);
        }
        .footer-bottom a {
            color: var(--color-text-dim);
            transition: var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--color-secondary);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            padding: 8rem 0 4rem;
            background: linear-gradient(135deg, #0A2647 0%, #0B1C2F 50%, #0A2647 100%);
            position: relative;
            overflow: hidden;
            min-height: 50vh;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        .page-hero h1 span {
            color: var(--color-secondary);
        }
        .page-hero p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            margin-bottom: 2rem;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--color-text-dim);
            font-size: 0.85rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--color-text-dim);
            transition: var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--color-secondary);
        }
        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.2);
        }
        .breadcrumb .current {
            color: var(--color-secondary);
        }
        @media (max-width: 768px) {
            .page-hero {
                padding: 6rem 0 3rem;
                min-height: auto;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 640px) {
            .page-hero h1 {
                font-size: 1.6rem;
            }
        }

@media (max-width:768px) {
                .section-padding .container>div[style*="grid-template-columns:1fr 1fr"] {
                    grid-template-columns:1fr !important;
                    gap:2rem !important;
                }
            }

@media (max-width:768px) {
                .section-padding .container>div[style*="grid-template-columns:repeat(4,1fr)"] {
                    grid-template-columns:repeat(2,1fr) !important;
                    gap:1rem !important;
                }
            }
            @media (max-width:480px) {
                .section-padding .container>div[style*="grid-template-columns:repeat(4,1fr)"] {
                    grid-template-columns:1fr !important;
                }
            }

@media (max-width:768px) {
                .section-padding .container>div[style*="grid-template-columns:1fr 1fr"]:last-child {
                    grid-template-columns:1fr !important;
                }
            }

@media (max-width:768px) {
                .section-padding .container>div[style*="grid-template-columns:repeat(3,1fr)"] {
                    grid-template-columns:1fr !important;
                }
            }