@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@600;800&family=Noto+Sans+SC:wght@300;700;900&display=swap');
        
        :root { 
            --tg-blue: #24A1DE; 
            --tg-gradient: linear-gradient(135deg, #24A1DE 0%, #00E5FF 100%);
            --text-main: #0F172A;
            --text-gray: #4d5156;
            --border-color: #ebebeb;
            --bg-light: #f8f9fa;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { 
            font-family: 'Plus Jakarta Sans', 'Noto Sans SC', sans-serif; 
            color: var(--text-main);
            line-height: 1.8;
            background-color: #fff;
        }

        /* Header đồng bộ với Help Center */
        .page-header {
            padding: 15px 5%;
            display: flex;
            align-items: center;
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
        }
        .logo {
            text-decoration: none;
            color: var(--tg-blue);
            font-weight: 900;
            font-size: 22px;
        }
        .header-divider { margin: 0 15px; color: var(--border-color); }
        .page-title { color: var(--text-gray); font-weight: 600; font-size: 18px; }

        /* Hero Section */
        .hero-banner {
            background-image: radial-gradient(at 0% 0%, rgba(36, 161, 222, 0.08) 0px, transparent 50%);
            padding: 60px 5%;
            border-bottom: 1px solid var(--border-color);
        }
        .hero-banner h1 {
            max-width: 900px;
            margin: 0 auto;
            font-size: 2.5rem;
            font-weight: 800;
        }
        .last-updated {
            max-width: 900px;
            margin: 10px auto 0;
            color: var(--text-gray);
            font-size: 14px;
        }

        /* Content Area */
        .main-content {
            max-width: 900px;
            margin: 40px auto;
            padding: 0 20px;
        }
        
        section { margin-bottom: 40px; }
        
        h2 {
            font-size: 1.5rem;
            color: var(--text-main);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        h2 i { color: var(--tg-blue); font-size: 1.2rem; }

        p { margin-bottom: 15px; color: #334155; text-align: justify; }

        .info-box {
            background: var(--bg-light);
            padding: 25px;
            border-radius: 15px;
            border-left: 4px solid var(--tg-blue);
            margin: 20px 0;
        }

        ul { margin-left: 20px; margin-bottom: 20px; }
        li { margin-bottom: 10px; color: #334155; }

        /* Footer đồng bộ */
        .g-footer {
            background: #f2f2f2;
            border-top: 1px solid #dadce0;
            color: #70757a;
            font-size: 14px;
            padding: 30px 5%;
            text-align: center;
        }
        .f-links {
            display: flex;
            justify-content: center;
            gap: 25px;
            margin-bottom: 15px;
        }
        .f-links a { text-decoration: none; color: inherit; }

        @media (max-width: 768px) {
            .hero-banner h1 { font-size: 1.8rem; }
            .page-header { padding: 15px 20px; }
        }