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

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
            background: #F4F6F9;
            color: #1A2C3E;
        }

        .header {
            background: rgba(244, 246, 249, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid #E2E8F0;
            position: sticky;
            top: 0;
            z-index: 50;
        }

        .nav-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 1rem 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: #1E3A5F;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
        }

        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #4A5A6E;
            transition: 0.2s;
        }

        .nav-links a.active, .nav-links a:hover {
            color: #E86A4F;
        }

        .hero-guide {
            text-align: center;
            margin: 3rem auto 2rem;
            padding: 0 2rem;
        }

        .hero-guide h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #1E3A5F;
            letter-spacing: -0.02em;
        }

        .hero-guide p {
            color: #5A6E7F;
            margin-top: 0.5rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .course-grid {
            max-width: 1300px;
            margin: 2rem auto 4rem;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 2rem;
        }

        .course-card {
            background: white;
            border-radius: 1.5rem;
            overflow: hidden;
            border: 1px solid #E2E8F0;
            transition: all 0.25s;
            box-shadow: 0 2px 8px rgba(0,0,0,0.02);
        }

        .course-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 30px -12px rgba(0,0,0,0.08);
            border-color: #E86A4F40;
        }

        .course-image {
            background: #F0F4F9;
            padding: 1.8rem;
            text-align: center;
            font-size: 2.5rem;
            border-bottom: 1px solid #EDF2F6;
        }

        .course-content {
            padding: 1.5rem;
        }

        .course-tag {
            display: inline-block;
            background: #F0F4F9;
            padding: 0.2rem 0.8rem;
            border-radius: 40px;
            font-size: 0.7rem;
            font-weight: 600;
            color: #E86A4F;
            margin-bottom: 0.8rem;
        }

        .course-content h3 {
            font-size: 1.4rem;
            margin-bottom: 0.5rem;
        }

        .course-meta {
            display: flex;
            gap: 1rem;
            margin: 1rem 0;
            font-size: 0.8rem;
            color: #8D9AAA;
        }

        .progress-bar {
            background: #E2E8F0;
            border-radius: 20px;
            height: 6px;
            margin: 1rem 0;
            overflow: hidden;
        }

        .progress-fill {
            background: #E86A4F;
            width: 30%;
            height: 100%;
            border-radius: 20px;
        }

        .btn-course {
            background: transparent;
            border: 1px solid #CBD5E1;
            border-radius: 40px;
            padding: 0.5rem 1.2rem;
            font-weight: 500;
            text-decoration: none;
            display: inline-block;
            color: #1E3A5F;
            transition: 0.2s;
        }

        .btn-course:hover {
            background: #E86A4F;
            border-color: #E86A4F;
            color: white;
        }

        .resources-section {
            max-width: 1300px;
            margin: 2rem auto;
            padding: 0 2rem;
        }

        .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: #1E3A5F;
            margin-bottom: 1.5rem;
        }

        .resource-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.2rem;
        }

        .resource-item {
            background: white;
            border-radius: 1rem;
            padding: 1rem 1.2rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            border: 1px solid #E2E8F0;
            transition: 0.2s;
        }

        .resource-item:hover {
            border-color: #E86A4F;
        }

        .resource-icon {
            font-size: 1.6rem;
        }

        .resource-text strong {
            display: block;
        }

        .footer {
            background: #F4F6F9;
            border-top: 1px solid #E2E8F0;
            margin-top: 4rem;
        }

        .footer-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 3rem 2rem 2rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }

        .footer-col a {
            display: block;
            color: #6B7A8A;
            text-decoration: none;
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
        }

        .footer-col a:hover {
            color: #E86A4F;
        }

        .copyright {
            text-align: center;
            padding: 1.5rem;
            font-size: 0.8rem;
            color: #8D9AAA;
            border-top: 1px solid #E2E8F0;
        }

        @media (max-width: 700px) {
            .hero-guide h1 { font-size: 2rem; }
            .course-grid { grid-template-columns: 1fr; }
        }