/* ==========================================================================
   TNB RESEARCH & DEVELOPMENT SECTION
   ========================================================================== */
.tnb-rd-page {
    padding: 100px 0;
    background-color: #FFFFFF;
    position: relative;
}

/* Elemen Dekoratif Background (Tech Pattern) */
.tnb-rd-page::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(55, 100, 235, 0.05) 0%, transparent 70%);
    z-index: 0;
}

.tnb-rd-header {
    text-align: center;
    max-width: 850px;
    margin: 0 auto 70px auto;
    position: relative;
    z-index: 1;
}

.tnb-rd-header .sub-title {
    color: #00B0FC;
    /* Menggunakan biru terang untuk kesan teknologi */
    font-family: 'Jost', sans-serif;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
    display: block;
}

.tnb-rd-header .title {
    color: #142441;
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 25px;
    line-height: 1.3;
}

.tnb-rd-header p {
    color: #6B778C;
    font-size: 17px;
    line-height: 1.8;
}

/* R&D Focus Grid */
.tnb-rd-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 35px;
    position: relative;
    z-index: 1;
}

/* R&D Focus Card */
.tnb-rd-card {
    background: #F8FAFD;
    border-radius: 16px;
    padding: 45px 35px;
    border: 1px solid #EAEFEF;
    transition: all 0.4s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
    overflow: hidden;
}

/* Animasi Glow Tech Effect di sudut atas */
.tnb-rd-card::before {
    content: "";
    position: absolute;
    top: -50px;
    right: -50px;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #3764EB 0%, #00B0FC 100%);
    border-radius: 50%;
    opacity: 0;
    transition: all 0.5s ease;
    filter: blur(20px);
}

.tnb-rd-card:hover {
    background: #FFFFFF;
    border-color: #00B0FC;
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 176, 252, 0.1);
}

.tnb-rd-card:hover::before {
    opacity: 0.3;
    top: -20px;
    right: -20px;
}

.tnb-rd-icon {
    font-size: 45px;
    color: #142441;
    margin-bottom: 25px;
    transition: all 0.4s ease;
}

.tnb-rd-card:hover .tnb-rd-icon {
    color: #00B0FC;
    transform: scale(1.1);
}

.tnb-rd-title {
    color: #142441;
    font-size: 22px;
    font-weight: 700;
    font-family: 'Arimo', sans-serif;
    margin-bottom: 15px;
}

.tnb-rd-desc {
    color: #6B778C;
    font-size: 15px;
    line-height: 1.7;
    margin: 0;
}

/* Collaboration Banner */
.tnb-collab-banner {
    margin-top: 80px;
    background: #142441;
    border-radius: 20px;
    padding: 60px;
    text-align: center;
    color: #FFFFFF;
    position: relative;
    overflow: hidden;
}

.tnb-collab-banner::after {
    content: "\f0c3";
    /* Icon flask/kimia FontAwesome */
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    font-size: 200px;
    position: absolute;
    right: -20px;
    bottom: -50px;
    color: rgba(255, 255, 255, 0.03);
    z-index: 0;
}

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

.tnb-collab-content h3 {
    color: #FFFFFF;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
}

.tnb-btn-glow {
    background: #00B0FC;
    color: #FFFFFF;
    padding: 15px 40px;
    border-radius: 40px;
    font-family: 'Jost', sans-serif;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    margin-top: 20px;
    border: none;
}

.tnb-btn-glow:hover {
    background: #3764EB;
    box-shadow: 0 0 20px rgba(0, 176, 252, 0.5);
    color: #FFFFFF;
}