:root {
            --blue-50: #eff6ff;
            --blue-100: #dbeafe;
            --blue-200: #bfdbfe;
            --blue-300: #93c5fd;
            --blue-400: #60a5fa;
            --blue-500: #3b82f6;
            --blue-600: #2563eb;
            --blue-700: #1d4ed8;
            --blue-800: #1e40af;
            --blue-900: #1e3a5f;
            --blue-950: #0c1d3b;
            --white: #ffffff;
            --gray-50: #f8fafc;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-600: #475569;
            --gray-700: #334155;
            --gray-800: #1e293b;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1), 0 4px 10px rgba(0, 0, 0, 0.08);
            --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
            background: var(--blue-50);
            color: var(--gray-800);
            line-height: 1.7;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .bg-decoration {
            position: fixed;
            pointer-events: none;
            z-index: 0;
            border-radius: 50%;
            filter: blur(100px);
            opacity: 0.35;
        }
        .bg-blob-1 {
            width: 500px;
            height: 500px;
            background: var(--blue-300);
            top: -180px;
            right: -120px;
            animation: floatBlob 18s ease-in-out infinite;
        }
        .bg-blob-2 {
            width: 380px;
            height: 380px;
            background: var(--blue-400);
            bottom: -100px;
            left: -100px;
            animation: floatBlob 22s ease-in-out infinite reverse;
        }
        .bg-blob-3 {
            width: 280px;
            height: 280px;
            background: var(--blue-200);
            top: 50%;
            left: 55%;
            animation: floatBlob 20s ease-in-out infinite 5s;
        }

        @keyframes floatBlob {
            0%,
            100% {
                transform: translate(0, 0) scale(1);
            }
            25% {
                transform: translate(40px, -30px) scale(1.08);
            }
            50% {
                transform: translate(-20px, 25px) scale(0.94);
            }
            75% {
                transform: translate(-35px, -15px) scale(1.05);
            }
        }

        .main-container {
            position: relative;
            z-index: 1;
            max-width: 960px;
            margin: 0 auto;
            padding: 24px 20px 60px;
        }

        .site-header {
            text-align: center;
            padding: 18px 0 10px;
        }
        .site-logo-link {
            display: inline-block;
            text-decoration: none;
            color: var(--blue-700);
            font-weight: 700;
            font-size: 1.3rem;
            letter-spacing: -0.02em;
            transition: var(--transition);
        }
        .site-logo-link:hover {
            color: var(--blue-500);
        }
        .site-logo-link span {
            color: var(--blue-500);
        }

        .lang-tabs-wrapper {
            display: flex;
            justify-content: center;
            gap: 6px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }
        .lang-tab {
            padding: 10px 22px;
            border-radius: 50px;
            border: 2px solid var(--blue-300);
            background: var(--white);
            color: var(--blue-700);
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            user-select: none;
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .lang-tab:hover {
            background: var(--blue-100);
            border-color: var(--blue-400);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .lang-tab.active {
            background: var(--blue-600);
            color: var(--white);
            border-color: var(--blue-600);
            box-shadow: var(--shadow-lg);
        }

        .lang-content {
            display: none;
            animation: fadeSlideIn 0.4s ease-out;
        }
        .lang-content.active {
            display: block;
        }

        @keyframes fadeSlideIn {
            from {
                opacity: 0;
                transform: translateY(16px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 28px 30px;
            margin-bottom: 22px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--blue-100);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--blue-200);
        }
        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            background: linear-gradient(180deg, var(--blue-500), var(--blue-600));
            border-radius: 5px 0 0 5px;
        }

        .hero-card {
            background: linear-gradient(135deg, #1e40af 0%, #1d4ed8 30%, #2563eb 60%, #3b82f6 100%);
            color: var(--white);
            text-align: center;
            padding: 44px 30px;
            border-radius: var(--radius-xl);
            margin-bottom: 28px;
            box-shadow: var(--shadow-xl);
            border: none;
            position: relative;
            overflow: hidden;
        }
        .hero-card::before {
            display: none;
        }
        .hero-card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 20%, rgba(255, 255, 255, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero-card h1 {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .hero-card .hero-subtitle {
            font-size: 1.1rem;
            opacity: 0.9;
            font-weight: 400;
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
        }
        .hero-emoji {
            font-size: 3rem;
            display: block;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }

        .section-title {
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--blue-800);
            margin-bottom: 6px;
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .section-title .icon-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--blue-100);
            font-size: 1.3rem;
            flex-shrink: 0;
        }
        .section-subtitle {
            color: var(--gray-600);
            margin-bottom: 16px;
            font-size: 0.95rem;
            margin-left: 52px;
        }

        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 16px;
            margin-bottom: 22px;
        }
        .benefit-item {
            background: var(--white);
            border-radius: var(--radius);
            padding: 22px 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--blue-100);
            text-align: center;
            transition: var(--transition);
        }
        .benefit-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
            border-color: var(--blue-300);
        }
        .benefit-icon {
            font-size: 2.4rem;
            display: block;
            margin-bottom: 8px;
        }
        .benefit-item h4 {
            font-weight: 700;
            color: var(--blue-800);
            margin-bottom: 4px;
            font-size: 1.05rem;
        }
        .benefit-item p {
            font-size: 0.9rem;
            color: var(--gray-600);
            line-height: 1.5;
        }

        .tool-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            margin-bottom: 16px;
            box-shadow: var(--shadow);
            border: 1px solid var(--blue-100);
            transition: var(--transition);
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .tool-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--blue-300);
        }
        .tool-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
        }
        .tool-info h4 {
            font-weight: 700;
            color: var(--blue-800);
            margin-bottom: 4px;
            font-size: 1.1rem;
        }
        .tool-info p {
            font-size: 0.92rem;
            color: var(--gray-700);
            line-height: 1.6;
        }
        .tool-tag {
            display: inline-block;
            background: var(--blue-50);
            color: var(--blue-700);
            padding: 4px 10px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            margin-top: 6px;
            margin-right: 4px;
            letter-spacing: 0.01em;
        }

        .step-list {
            list-style: none;
            padding: 0;
            counter-reset: step;
        }
        .step-list li {
            counter-increment: step;
            position: relative;
            padding-left: 60px;
            margin-bottom: 20px;
            min-height: 50px;
        }
        .step-list li::before {
            content: counter(step);
            position: absolute;
            left: 0;
            top: 2px;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
        }
        .step-list li h4 {
            font-weight: 700;
            color: var(--blue-800);
            margin-bottom: 2px;
        }
        .step-list li p {
            color: var(--gray-700);
            font-size: 0.92rem;
            line-height: 1.6;
        }

        .quote-box {
            background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            margin: 20px 0;
            border-left: 5px solid var(--blue-500);
            font-style: italic;
            color: var(--blue-800);
            font-size: 1rem;
            position: relative;
        }
        .quote-box::before {
            content: '"';
            font-size: 4rem;
            position: absolute;
            top: -8px;
            left: 14px;
            color: var(--blue-300);
            font-style: normal;
            font-weight: 800;
            line-height: 1;
            opacity: 0.6;
        }
        .quote-box p {
            margin: 0;
            padding-left: 10px;
        }

        .cta-card {
            background: linear-gradient(135deg, #1d4ed8, #2563eb);
            color: #fff;
            text-align: center;
            padding: 36px 28px;
            border-radius: var(--radius-xl);
            margin-top: 28px;
            box-shadow: var(--shadow-xl);
        }
        .cta-card h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .cta-card p {
            opacity: 0.9;
            margin-bottom: 16px;
        }
        .cta-link {
            display: inline-block;
            background: #fff;
            color: var(--blue-700);
            padding: 12px 28px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: var(--shadow-md);
        }
        .cta-link:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-xl);
            background: var(--blue-50);
        }

        .site-footer {
            text-align: center;
            padding: 24px 0 10px;
            color: var(--gray-600);
            font-size: 0.85rem;
            opacity: 0.8;
        }
        .site-footer a {
            color: var(--blue-600);
            text-decoration: none;
            font-weight: 600;
        }
        .site-footer a:hover {
            text-decoration: underline;
        }

        @media (max-width: 768px) {
            .hero-card h1 {
                font-size: 1.5rem;
            }
            .hero-card {
                padding: 30px 18px;
            }
            .card {
                padding: 20px 16px;
            }
            .tool-card {
                flex-direction: column;
                gap: 10px;
            }
            .section-subtitle {
                margin-left: 0;
            }
            .benefits-grid {
                grid-template-columns: 1fr 1fr;
            }
            .step-list li {
                padding-left: 48px;
            }
            .lang-tab {
                padding: 8px 14px;
                font-size: 0.82rem;
            }
        }
        @media (max-width: 480px) {
            .benefits-grid {
                grid-template-columns: 1fr;
            }
            .hero-card h1 {
                font-size: 1.25rem;
            }
            .lang-tab {
                padding: 7px 10px;
                font-size: 0.75rem;
            }
        }