/* =========================================================================
   PAGE: GIỚI THIỆU (ABOUT US - CORPORATE PROFILE)
   ========================================================================= */

/* --- Hero Section --- */
.vc-about-hero-cyber {
    position: relative;
    padding: 130px 0 100px 0;
    background-color: #020202;
    overflow: hidden;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* Các lớp nền đồ họa (Layers) */
.hero-bg-image {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    filter: grayscale(100%) brightness(0.2); /* Làm mờ, tối và xám ảnh đi */
    z-index: 0;
}

.hero-overlay-deep {
    position: absolute;
    inset: 0;
    /* Gradient từ đen sâu sang đỏ tối ở phía dưới */
    background: linear-gradient(180deg, rgba(5,5,5,1) 0%, rgba(5,5,5,0.7) 40%, rgba(211, 47, 47, 0.08) 100%);
    z-index: 1;
}

.hero-grid-pattern {
    position: absolute;
    inset: 0;
    /* Lưới caro mờ */
    background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: 1;
    pointer-events: none;
}

/* Badge trạng thái Cyber (Blinking) */
.cyber-status-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 255, 136, 0.05);
    border: 1px solid rgba(0, 255, 136, 0.3);
    color: #00ff88;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    backdrop-filter: blur(5px);
}

.blinking-dot {
    width: 8px;
    height: 8px;
    background-color: #00ff88;
    border-radius: 50%;
    margin-right: 12px;
    box-shadow: 0 0 10px #00ff88;
    animation: cyber-blink 1.5s infinite;
}

@keyframes cyber-blink {
    0%, 100% {
        opacity: 1;
    }

    50% {
        opacity: 0.3;
    }
}

/* Typography cho Hero */
.hero-title-massive .text-outline {
    font-size: clamp(3rem, 6vw, 4.5rem);
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(255, 255, 255, 0.4);
    letter-spacing: 2px;
}

.hero-title-massive .text-solid-gold {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    background: linear-gradient(to right, #ffffff 0%, var(--brand-yellow) 50%, #d4af37 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
    text-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.about-slogan-lead {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.6;
}


/* --- 1. TỰ ĐỘNG FORMAT NỘI DUNG HTML CỦA CỘT CONTENT --- */
.pro-article-content {
    color: #b0b0b0; /* Màu chữ chuẩn cho nền tối */
    font-size: 1.1rem;
    line-height: 1.8; /* Khoảng cách dòng rộng rãi dễ đọc */
    font-family: var(--font-primary);
}

    /* Format Tiêu đề */
    .pro-article-content h2 {
        color: #fff;
        font-size: 2rem;
        font-weight: 800;
        margin-top: 2.5rem;
        margin-bottom: 1.5rem;
        border-left: 4px solid var(--brand-yellow);
        padding-left: 15px;
    }

    .pro-article-content h3,
    .pro-article-content h4 {
        color: #fff;
        font-weight: 700;
        margin-top: 2rem;
        margin-bottom: 1rem;
    }

    /* Format Đoạn văn */
    .pro-article-content p {
        margin-bottom: 1.5rem;
        text-align: justify; /* Căn đều 2 bên trông chuyên nghiệp hơn */
    }

    .pro-article-content strong, .pro-article-content b {
        color: #fff;
        font-weight: 700;
    }

    /* Format Danh sách (Bullets) */
    .pro-article-content ul {
        list-style: none; /* Tắt chấm tròn mặc định */
        padding-left: 0;
        margin-bottom: 2rem;
    }

        .pro-article-content ul li {
            position: relative;
            padding-left: 35px;
            margin-bottom: 15px;
        }
            /* Tạo icon check vàng thay cho dấu chấm tròn */
            .pro-article-content ul li::before {
                content: '\f00c'; /* Unicode của fa-check */
                font-family: "Font Awesome 6 Free";
                font-weight: 900;
                position: absolute;
                left: 0;
                top: 0;
                color: var(--brand-yellow);
                font-size: 1.2rem;
            }

    /* Format Hình ảnh tự động responsive */
    .pro-article-content img {
        max-width: 100%;
        height: auto !important;
        border-radius: 12px;
        margin: 2rem 0;
        box-shadow: 0 10px 30px rgba(0,0,0,0.5);
        border: 1px solid rgba(255,255,255,0.05);
    }

/* --- 2. HỘP CHỮ KÝ TÁC GIẢ --- */
.author-signature-box {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 12px;
    padding: 30px;
    border-top: 3px solid var(--brand-red);
}

.signature-avatar {
    width: 60px;
    height: 60px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-yellow);
    font-size: 1.5rem;
}

/* --- 3. SIDEBAR CỐ ĐỊNH (STICKY) --- */
.sticky-sidebar-wrapper {
    position: sticky;
    top: 100px; /* Cố định sidebar khi cuộn chuột qua thẻ Header */
}

/* Box Gọi điện */
.cyber-contact-card {
    background: rgba(20,20,22,0.8);
    border: 1px solid rgba(255,193,7,0.2);
    border-radius: 16px;
    position: relative;
    overflow: hidden;
}

.card-glow-effect {
    position: absolute;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 150px;
    background: rgba(255,193,7,0.15);
    filter: blur(50px);
}

.pulse-icon {
    width: 60px;
    height: 60px;
    background: rgba(255,193,7,0.1);
    color: var(--brand-yellow);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    animation: pulseYellow 2s infinite;
    border: 1px solid rgba(255,193,7,0.3);
}

@keyframes pulseYellow {
    0% {
        box-shadow: 0 0 0 0 rgba(255,193,7,0.4);
    }

    70% {
        box-shadow: 0 0 0 15px rgba(255,193,7,0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(255,193,7,0);
    }
}

.btn-hotline-massive {
    display: block;
    background: var(--brand-yellow);
    color: #000;
    padding: 15px 20px;
    border-radius: 8px;
    font-weight: 900;
    font-size: 1.4rem;
    text-decoration: none;
    transition: 0.3s;
    box-shadow: 0 5px 20px rgba(255,193,7,0.3);
}

    .btn-hotline-massive:hover {
        background: #fff;
        transform: translateY(-3px);
    }

/* Box Info Công ty */
.company-info-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 16px;
}

.info-icon {
    font-size: 1.2rem;
    margin-top: 2px;
}

/* --- Responsive --- */
@media (max-width: 991.98px) {
    .sticky-sidebar-wrapper {
        position: static;
        margin-top: 40px;
    }

    .pro-article-content h2 {
        font-size: 1.6rem;
    }
}