/* ============================================================
   SECTION 4: ABOUT US (CÂU CHUYỆN THƯƠNG HIỆU) & TRANG GIỚI THIỆU
   ============================================================ */

/* ============================================================
   BANNER CHÍNH TRANG GIỚI THIỆU (UTEN-ABOUT-BANNER)
   ============================================================ */
.uten-about-banner {
    position: relative;
    padding: 80px 0 120px; /* Thêm khoảng trống bên dưới để uốn lượn đẹp */
    background: linear-gradient(135deg, #a87e2a 0%, #684a14 100%); /* Dải màu vàng gold */
    color: #fff;
    text-align: center;
    overflow: hidden;
}

.uten-about-banner-content {
    max-width: 800px;
    margin: 0 auto;
    z-index: 2;
    position: relative;
    padding: 0 20px;
    opacity: 0;
}

.uten-about-banner-content.is-visible {
    animation: fadeInLeftSmooth 2s ease-out forwards;
}

@keyframes fadeInLeftSmooth {
    from { opacity: 0; transform: translateX(-50px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRightSmooth {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

.uten-about-banner .sig-title {
    font-family: 'Brush Script MT', cursive;
    font-size: clamp(2rem, 4vw, 3rem);
    color: #ffd700; /* Màu vàng gold sáng hơn */
    margin-bottom: 12px;
    font-weight: 300;
}

.uten-about-banner .main-title {
    font-size: clamp(2.5rem, 6vw, 4.2rem);
    font-weight: 900;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 24px;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.uten-about-banner .banner-desc {
    font-size: 16.5px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 32px;
}

/* Badges */
.uten-about-banner .banner-badges {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.uten-about-banner .banner-badge {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 13.5px;
    font-weight: 600;
    color: #fff;
    backdrop-filter: blur(5px);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* Nút bấm */
.uten-about-banner .banner-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.uten-about-banner .btn-primary {
    background: #fff;
    color: var(--uten-primary, #287b38) !important;
    font-weight: 700;
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
    font-size: 15px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.uten-about-banner .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.2);
}

.uten-about-banner .btn-secondary {
    background: transparent;
    color: #fff !important;
    border: 2px solid #fff;
    font-weight: 700;
    padding: 12px 32px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 50px;
    text-decoration: none;
    transition: background 0.2s ease, transform 0.2s ease;
    font-size: 15px;
}

.uten-about-banner .btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

/* Sóng uốn lượn đáy banner giới thiệu */
.uten-about-banner .uten-wave-divider {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
    transform: rotate(0);
    z-index: 1;
}

.uten-about-banner .uten-wave-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 60px; /* Tăng độ cao sóng */
}

/* ============================================================
   PHẦN CÂU CHUYỆN (uten-about-story-section)
   ============================================================ */
.uten-about-story-section {
    padding: 100px 24px;
    background: #fff;
    position: relative;
}

.uten-about-wrap {
    display: flex;
    align-items: center;
    gap: 60px;
    max-width: 1140px;
    margin: 0 auto;
}

/* ── CỘT HÌNH ẢNH ── */
.uten-about-image-col {
    flex: 1;
    position: relative;
    opacity: 0;
}

.uten-about-image-col.is-visible {
    animation: fadeInLeftSmooth 2s ease-out forwards;
}

.uten-about-img-box {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(40, 123, 56, 0.15);
    aspect-ratio: 4/5;
}

.uten-about-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.uten-about-img-box:hover img {
    transform: scale(1.05);
}

/* Badge 100% Fresh */
.uten-about-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 140px;
    height: 140px;
    background: var(--uten-secondary, #f28200);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 10px 30px rgba(242, 130, 0, 0.3);
    border: 8px solid #fff;
    transform: translate(-50px, -50px);
    z-index: 2;
}

.uten-about-badge span {
    font-size: 36px;
    font-weight: 900;
    line-height: 1;
}

.uten-about-badge small {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 4px;
}

/* ── CỘT NỘI DUNG ── */
.uten-about-content-col {
    flex: 1;
    padding-right: 40px;
    opacity: 0;
}

.uten-about-content-col.is-visible {
    animation: fadeInRightSmooth 2s ease-out forwards;
}

.uten-about-subtitle {
    display: inline-block;
    color: var(--uten-secondary, #f28200);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 14px;
    margin-bottom: 12px;
    position: relative;
    padding-left: 50px;
}

.uten-about-subtitle::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 2px;
    background: var(--uten-secondary, #f28200);
}

.uten-about-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--uten-primary, #287b38);
    margin: 0 0 24px;
    line-height: 1.2;
}

.uten-about-desc p {
    font-size: 16px;
    line-height: 1.8;
    color: #555;
    margin-bottom: 16px;
}

.uten-about-desc strong {
    color: var(--uten-primary, #287b38);
    font-weight: 700;
}

.uten-about-signature {
    margin-top: 32px;
    border-top: 1px solid #eee;
    padding-top: 24px;
    display: inline-block;
}

.uten-about-signature .sig-name {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--uten-primary, #287b38);
    font-family: 'Brush Script MT', cursive; /* Phông chữ ký */
    margin-bottom: 4px;
}

.uten-about-signature .sig-role {
    font-size: 13px;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

/* ============================================================
   PHẦN GIÁ TRỊ CỐT LÕI (uten-about-values-section)
   ============================================================ */
.uten-about-values-section {
    padding: 100px 24px;
    background: #f8fdf8; /* Xanh lá siêu nhạt */
}

.uten-about-section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 50px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1140px;
    margin: 0 auto;
}

.value-card {
    background: #fff;
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    border: 1.5px solid #d4e8d4;
    box-shadow: 0 8px 25px rgba(40,123,56,0.06);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
    opacity: 0;
}

.value-card.is-visible {
    animation: fadeInUpSmooth 2s ease-out forwards;
}

.value-card:nth-child(1) { animation-delay: 0.1s; }
.value-card:nth-child(2) { animation-delay: 0.2s; }
.value-card:nth-child(3) { animation-delay: 0.3s; }

.value-card:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 20px 40px rgba(40,123,56,0.15);
}

.value-icon {
    font-size: 44px; /* for emojis, but svgs are hardcoded to 48px */
    margin-bottom: 20px;
    color: var(--uten-secondary, #f28200); /* Orange color for the SVG icons */
    display: inline-flex;
    justify-content: center;
}

.value-title {
    font-size: 20px;
    font-weight: 800;
    color: var(--uten-primary, #287b38);
    margin-bottom: 12px;
}

.value-desc {
    font-size: 14.5px;
    line-height: 1.7;
    color: #666;
    margin: 0;
}

/* ============================================================
   THƯ VIỆN ẢNH KHÔNG GIAN (uten-about-gallery-section)
   ============================================================ */
.uten-about-gallery-section {
    padding: 100px 24px;
    background: #fff;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 1140px;
    margin: 0 auto;
}

.gallery-item {
    border-radius: 18px;
    overflow: hidden;
    aspect-ratio: 4/3;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
    opacity: 0;
}

.gallery-item.is-visible {
    animation: fadeInUpSmooth 2s ease-out forwards;
}

.gallery-item:nth-child(1) { animation-delay: 0.1s; }
.gallery-item:nth-child(2) { animation-delay: 0.2s; }
.gallery-item:nth-child(3) { animation-delay: 0.3s; }

.gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

@keyframes fadeInUpSmooth {
    from { opacity: 0; transform: translateY(60px); }
    to { opacity: 1; transform: translateY(0); }
}

/* RESPONSIVE TRANG GIỚI THIỆU */
@media (max-width: 992px) {
    .uten-about-wrap {
        flex-direction: column;
        gap: 40px;
    }
    .uten-about-content-col {
        padding-right: 0;
        text-align: center;
    }
    .uten-about-subtitle::before {
        display: none;
    }
    .uten-about-subtitle {
        padding-left: 0;
    }
    .uten-about-signature {
        display: block;
        text-align: center;
    }
    .uten-about-badge {
        width: 110px;
        height: 110px;
        transform: translate(-30px, -30px);
    }
    .uten-about-badge span { font-size: 28px; }
    .uten-about-banner {
        padding: 80px 0 120px;
    }
    .values-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
}

@media (max-width: 540px) {
    .uten-about-story-section {
        padding: 60px 16px;
    }
    .uten-about-title {
        font-size: 32px;
    }
}