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

        body {
            font-family: 'Microsoft YaHei', 'PingFang SC', 'Segoe UI', Arial, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
            color: #333;
            line-height: 1.7;
            min-height: 100vh;
            padding-bottom: 40px;
        }

        .container {
            max-width: 1100px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            margin-top: 30px;
            margin-bottom: 30px;
        }

        header {
            background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #1d4ed8 100%);
            color: white;
            padding: 50px 30px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path fill="rgba(255,255,255,0.08)" d="M0,0 L100,0 L100,100 L0,100 Z"/></svg>');
            background-size: cover;
        }

        header .header-content {
            position: relative;
            z-index: 1;
        }

        header h1 {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            letter-spacing: 3px;
            font-weight: 700;
            text-shadow: 3px 3px 6px rgba(0,0,0,0.3);
            animation: fadeInUp 0.8s ease-out;
        }

        header .version {
            font-size: 1.1rem;
            background: rgba(255,255,255,0.2);
            backdrop-filter: blur(10px);
            display: inline-block;
            padding: 0.5rem 1.5rem;
            border-radius: 30px;
            margin-top: 0.5rem;
            animation: fadeInUp 1s ease-out;
            border: 1px solid rgba(255,255,255,0.3);
        }

        header p {
            opacity: 0.95;
            max-width: 700px;
            margin: 0.8rem auto 0;
            font-size: 1.05rem;
            animation: fadeInUp 1.2s ease-out;
        }

        .nav-link {
            display: inline-block;
            background: linear-gradient(135deg, #27ae60 0%, #229954 100%);
            color: white;
            padding: 0.9rem 2.2rem;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            margin-top: 1.5rem;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(39, 174, 96, 0.35);
            animation: fadeInUp 1.4s ease-out;
            letter-spacing: 0.5px;
        }

        .nav-link:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(39, 174, 96, 0.45);
        }

        .content {
            padding: 40px 35px;
            flex: 1;
        }

        .section {
            margin-bottom: 40px;
            padding-bottom: 30px;
            border-bottom: 1px solid #eee;
            animation: fadeIn 0.8s ease-out;
        }

        .section:last-child {
            border-bottom: none;
        }

        .section-title {
            text-align: center;
            padding: 18px 25px;
            border-radius: 12px;
            margin-bottom: 25px;
            font-size: 1.5em;
            font-weight: bold;
            color: #fff;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
            letter-spacing: 1px;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
        }

        .section-title::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
            transition: left 0.5s;
        }

        .section-title:hover::before {
            left: 100%;
        }

        .section h2 {
            font-size: 1.5rem;
            margin-bottom: 1.2rem;
            color: #2c3e50;
            display: flex;
            align-items: center;
            gap: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.5px;
        }

        .section h2 i {
            font-size: 1.6rem;
        }

        .section h3 {
            font-size: 1.15rem;
            margin: 1.5rem 0 1rem;
            color: #34495e;
            border-left: 3px solid #3498db;
            padding-left: 1rem;
            font-weight: 600;
        }

        .section > p {
            color: #555;
            line-height: 1.8;
            font-size: 1rem;
        }

        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin: 1.5rem 0;
        }

        .card {
            background: #fff;
            border-radius: 14px;
            padding: 22px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            border: 1px solid rgba(255,255,255,0.9);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #3498db, #e74c3c, #27ae60);
            opacity: 0;
            transition: opacity 0.35s;
        }

        .card:hover {
            transform: translateY(-6px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.15);
        }

        .card:hover::before {
            opacity: 1;
        }

        .card h4 {
            font-size: 1.15rem;
            margin-bottom: 0.8rem;
            color: #2c3e50;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .card p {
            color: #666;
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .badge {
            display: inline-block;
            background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
            color: #475569;
            padding: 0.2rem 0.7rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-right: 0.4rem;
        }

        .tag {
            background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
            color: white;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 500;
        }

        .feature-list {
            list-style: none;
            padding-left: 0;
        }

        .feature-list li {
            margin-bottom: 0.8rem;
            padding-left: 1.8rem;
            position: relative;
            transition: all 0.2s ease;
            color: #555;
        }

        .feature-list li:hover {
            padding-left: 2rem;
        }

        .feature-list li:before {
            content: "✓";
            color: #27ae60;
            font-weight: bold;
            position: absolute;
            left: 0;
            font-size: 1.1rem;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.95rem;
            box-shadow: 0 3px 15px rgba(0,0,0,0.08);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid #e0e0e0;
        }

        th, td {
            padding: 1rem;
            text-align: left;
            border-bottom: 1px solid #f0f0f0;
        }

        th {
            background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
            font-weight: 600;
            color: #fff;
            font-size: 0.95rem;
        }

        tr:hover {
            background-color: #f8f9fa;
        }

        tr:last-child td {
            border-bottom: none;
        }

        .code-block {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: #ecf0f1;
            padding: 1.3rem;
            border-radius: 12px;
            font-family: 'Fira Code', 'Consolas', monospace;
            font-size: 0.9rem;
            overflow-x: auto;
            margin: 1.5rem 0;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
            line-height: 1.8;
        }

        .footer {
            background: linear-gradient(135deg, #f8f9fa 0%, #ecf0f1 100%);
            padding: 25px;
            text-align: center;
            font-size: 0.9rem;
            color: #7f8c8d;
            border-top: 1px solid #e0e0e0;
            margin-top: 20px;
        }

        .footer a {
            color: #3498db;
            text-decoration: none;
            font-weight: 500;
        }

        .footer a:hover {
            text-decoration: underline;
        }

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

        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(25px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @media (max-width: 768px) {
            body { padding: 10px; }
            .container { margin: 15px auto; border-radius: 15px; }
            .content { padding: 25px 18px; }
            header h1 { font-size: 2rem; }
            header { padding: 35px 20px; border-radius: 15px 15px 0 0; }
            .grid { grid-template-columns: 1fr; }
            .section h2 { font-size: 1.3rem; }
            .section-title { font-size: 1.25em; padding: 14px 18px; }
        }