:root {
    --navy: #00008A;
    --orange: #ee5421;
    --soft-bg: #f8f9fa;
    --transition-acc: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-adm-sm: 10px;
    --radius-adm-md: 20px;
    --radius-adm-lg: 30px;
}

.tis-adm-v3 { 
    font-family: 'Montserrat', sans-serif; 
    color: #111; 
    background: #fff; 
    overflow-x: hidden; 
}

.container { max-width: 1200px; margin: auto; padding: 0 25px; }
.section-p { padding: 100px 0; }

.hero-adm {
    padding: 180px 0 100px;
    background: linear-gradient(rgba(0,0,138,0.75), rgba(0,0,138,0.75)), url('https://tis.edu.vn/wp-content/uploads/2024/hero-admission.jpg') center/cover;
    text-align: center; 
    color: #fff;
    border-radius: 0 0 var(--radius-adm-lg) var(--radius-adm-lg);
}
.hero-adm h1 { 
    font-size: 52px; 
    font-weight: 900; 
    color: #fff; 
    margin-bottom: 20px; 
    text-transform: uppercase; 
}
.hero-adm p { 
    font-size: 18px; 
    max-width: 800px; 
    margin: auto; 
    opacity: 0.9; 
    line-height: 1.6; 
}

.step-row { display: flex; align-items: center; gap: 70px; margin-bottom: 120px; }
.step-row:last-child { margin-bottom: 0; }
.step-row:nth-child(even) { flex-direction: row-reverse; }

.step-media { flex: 1.1; position: relative; z-index: 2; }
.step-media img { 
    width: 100%; 
    border-radius: var(--radius-adm-lg); 
    box-shadow: 20px 20px 50px rgba(0,0,138,0.1); 
    transition: transform 0.5s ease, box-shadow 0.5s ease;
}
.step-media:hover img { 
    transform: translateY(-8px); 
    box-shadow: 25px 25px 60px rgba(0,0,138,0.18);
}

.step-bg-num {
    position: absolute; top: -60px; left: -40px; 
    font-size: 160px; font-weight: 900; 
    color: rgba(0,0,138,0.06);
    z-index: -1; line-height: 1; 
    pointer-events: none;
}

.step-content { flex: 0.9; }
.step-tag { 
    display: inline-block; padding: 8px 18px; 
    background: rgba(238, 84, 33, 0.1); 
    color: var(--orange); 
    font-weight: 800; font-size: 12px;
    letter-spacing: 2px; text-transform: uppercase; margin-bottom: 15px;
    border-radius: var(--radius-adm-sm);
}
.step-content h2 { 
    font-size: 34px; font-weight: 900; 
    color: var(--navy); margin-bottom: 25px; line-height: 1.2; 
}

.dna-accordion { 
    background: var(--soft-bg); 
    border: 1px solid #eee; 
    margin-bottom: 15px; 
    transition: var(--transition-acc);
    border-radius: var(--radius-md); 
    overflow: hidden;
}
.acc-trigger { 
    padding: 22px 30px; cursor: pointer; 
    display: flex; justify-content: space-between; align-items: center;
    font-weight: 700; color: var(--navy);
}
.acc-panel { 
    max-height: 0; overflow: hidden; 
    transition: var(--transition-acc); 
    padding: 0 30px; background: #fff;
}

.is-open { 
    border-color: var(--navy); 
    box-shadow: 0 10px 30px rgba(0,0,138,0.08);
}
.is-open .acc-panel { max-height: 1500px; padding: 30px; border-top: 1px solid #eee; }

.panel-inner li { 
    position: relative; padding-left: 25px; margin-bottom: 15px; 
    font-weight: 500; color: #444; line-height: 1.6; list-style: none;
}
.panel-inner li::before { 
    content: "✓"; position: absolute; left: 0; 
    color: var(--orange); font-weight: bold; 
}

.icon-plus { 
    font-size: 18px; transition: 0.4s; color: var(--orange); 
    width: 30px; height: 30px; background: #fff;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%; 
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.is-open .icon-plus { transform: rotate(45deg); color: #fff; background: var(--navy); }

.adm-cta {
    background: linear-gradient(135deg, var(--navy), #003b82);
    padding: 100px 40px; text-align: center; color: #fff;
    border-radius: var(--radius-adm-lg); 
    margin: 0 25px 100px; 
}
.adm-cta h2 { font-size: 38px; font-weight: 900; color: #fff; margin-bottom: 30px; }

@media (max-width: 991px) {
    .step-row, .step-row:nth-child(even) { flex-direction: column; gap: 40px; text-align: center; }
    .hero-adm h1 { font-size: 34px; }
    .step-bg-num { font-size: 100px; top: -30px; left: 0; width: 100%; text-align: center; }
    .acc-trigger { padding: 18px 25px; font-size: 15px; }
    .section-p { padding: 60px 0; }
    .adm-cta { margin: 0 15px 60px; padding: 60px 20px; }
}