/* Açılır menü stilleri */
.dropdown-menu {
    display: none;
    position: absolute;
    background-color: white;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
    border-radius: 4px;
}

.dropdown-menu a {
    color: #333;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

.dropdown-menu a:hover {
    background-color: #f1f1f1;
}

/* Açılır menüyü göster */
.dropdown:hover .dropdown-menu {
    display: block;
}
<!--Kalite Politikası burdabaşlıyor ---------------------------------------------------------------------------------------------------------------------------->
/* Kalite Politikamız bölümü için stil */
#kalitepolitika {
    padding: 80px 20px;
    margin-top: 50px;
    background-color: #f9f9f9;
    min-height: 100vh;
}

.kalite-container {
    max-width: 1000px;
    margin: 0 auto;
}

/* Kalite Politikamız başlığını ortala */
#kalitepolitika h1 {
    text-align: center;
    color: #41C0F0;
    font-size: 2.8em;
    margin-bottom: 40px;
    font-weight: 600;
}

/* Açıklama paragrafı */
.aciklama {
    text-align: center;
    font-size: 1.2em;
    line-height: 1.8;
    color: #555;
    margin-bottom: 50px;
    padding: 0 20px;
}

/* Madde işaretleri için stil */
.kalite-maddeleri {
    list-style: none;
    padding: 0;
    max-width: 900px;
    margin: 0 auto;
}

.kalite-maddeleri li {
    background: white;
    margin-bottom: 20px;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border-left: 5px solid #3498db;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.kalite-maddeleri li:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.kalite-maddeleri li strong {
    color: #2c3e50;
    font-size: 1.1em;
    display: block;
    margin-bottom: 10px;
}

.kalite-maddeleri li p {
    margin: 0;
    color: #666;
    line-height: 1.6;
    font-size: 1em;
}

/* Tik işareti için stil */
.kalite-maddeleri li::before {
    content: '✓';
    position: absolute;
    left: -15px;
    top: 25px;
    background: #27ae60;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2em;
}

/* ARDE vurgusu */
.kalite-maddeleri li em {
    color: #41C0F0;
    font-style: normal;
    font-weight: bold;
}

/* Yumuşak kaydırma efekti */
html {
    scroll-behavior: smooth;
}

/* Responsive tasarım */
@media (max-width: 768px) {
    #kalitepolitika h1 {
        font-size: 2.2em;
    }
    
    .aciklama {
        font-size: 1.1em;
        padding: 0 10px;
    }
    
    .kalite-maddeleri li {
        padding: 20px;
        margin-left: 15px;
    }
}
<!--Kalite Politikasıburdabitiyor-------------------------------------------------------------------------------------------------------------------------------->


.about-list {
    list-style-type: none;
    padding: 0;
    margin: 20px 0;
}

.about-list li {
    margin-bottom: 20px;
    position: relative;
    padding: 20px;
    padding-left: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-left: 4px solid #41C0F0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: left;
    line-height: 1.6;
}

/*.about-list li:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}*/

.about-list li:before {
    /*content: "✓";*/
    color: white;
    font-weight: bold;
    position: absolute;
     left: -12px;
     top: 50%;
    transform: translateY(-50%);
    background: #27ae60;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

/*.about-list li::marker {
    display: none;
    content: "";
}

.about-list {
    list-style: none;
}*/

/* Genel Stil */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    color: #333;
    line-height: 1.6;
    background-color: #f9f9f9;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo-container {
    display: flex;
    align-items: center;
    height: 60px;
}

.logo {
    height: 50px;
    margin-right: 10px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #41C0F0;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 25px;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #41C0F0;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1473341304170-971dccb5ac1e?ixlib=rb-4.0.3&auto=format&fit=crop&w=1500&q=80');
    background-size: cover;
    background-position: center;
    height: 100vh;
    display: flex;
    align-items: center;
    color: #fff;
    margin-top: 80px;
}

.hero-content {
    max-width: 600px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    background-color: #ff7f00;
    color: #fff;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #e67200;
}

/* Hizmetler */
.services {
    padding: 80px 0;
    background-color: #fff;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    color: #41C0F0;
    font-size: 2.5em;
    margin-bottom: 15px;
}

.section-title p {
    color: #666;
    font-size: 1.1em;
    max-width: 10000px;
    margin: 0 auto 30px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: #f5f5f5;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 40px;
    color: #41C0F0;
    margin-bottom: 20px;
}

.service-card h3 {
    margin-bottom: 15px;
    color: #333;
}

/* Projeler */
.projects {
    padding: 80px 0;
    background-color: #f5f5f5;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.project-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    transition: transform 0.3s;
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-img {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.project-card:hover .project-img img {
    transform: scale(1.1);
}

.project-info {
    padding: 20px;
}

.project-info h3 {
    margin-bottom: 10px;
    color: #000000;
    font-weight: 700;
}

.project-info h3 .arde-text {
    font-size: 19px;
    color: #41C0F0;
    margin-left: 4px;
    font-weight: bold;
}

/* Proje Detay Menüsü */
.project-details-menu {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(65, 192, 240, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    padding: 30px;
    text-align: center;
    overflow-y: auto;
}

.project-card:hover .project-details-menu {
    opacity: 1;
    visibility: visible;
}

.project-details-menu ul {
    list-style: none;
    width: 100%;
}

.project-details-menu ul li {
    margin-bottom: 7px;
}

.project-details-menu ul li a {
    color: #fff;
    text-decoration: none;
    display: block;
    padding: 5px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 5px;
    transition: background-color 0.3s;
    font-weight: 500;
}

.project-details-menu ul li a:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

/* Modal Pencereler */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.2);
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
    color: #333;
    background: none;
    border: none;
}

.modal-title {
    color: #41C0F0;
    margin-bottom: 15px;
    font-size: 24px;
}

.modal p {
    margin-bottom: 15px;
    line-height: 1.6;
}

/* Hakkımızda */
.about {
    padding: 80px 0;
    background-color: #fff;

}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-img {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.about-img img {
    width: 100%;
    height: auto;
    display: block;
}

.about-content h3 {
    color: #41C0F0;
    margin-bottom: 20px;
}

.about-content p {
    margin-bottom: 15px;
}

.about-features {
    margin-top: 30px;
}

.feature {
    display: flex;
    align-items: flex-start;
    margin-bottom: 25px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-3px);
}

.feature-icon {
    background: #41C0F0;
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 20px;
    flex-shrink: 0;
}

.feature-icon i {
    font-size: 20px;
}

.feature-content h4 {
    color: #2c3e50;
    margin-bottom: 8px;
    font-size: 1.2em;
}

.feature-content p {
    margin: 0;
    color: #666;
    line-height: 1.6;
}

/* Logo Slider */
.logo-slider-section {
    background-color: #f8f9fa;
    padding: 40px 0;
    border-top: 1px solid #e9ecef;
    overflow: hidden;
    position: relative;
}

.logo-slider-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.logo-slider-title {
    text-align: center;
    margin-bottom: 25px;
    font-size: 18px;
    color: #6c757d;
    font-weight: 500;
}

.logo-slider {
    overflow: hidden;
    position: relative;
    padding: 15px 0;
}

.logo-slider:before, .logo-slider:after {
    content: '';
    position: absolute;
    top: 0;
    width: 100px;
    height: 100%;
    z-index: 2;
}

.logo-slider:before {
    left: 0;
    background: linear-gradient(to right, rgba(248,249,250,1) 0%, rgba(248,249,250,0) 100%);
}

.logo-slider:after {
    right: 0;
    background: linear-gradient(to left, rgba(248,249,250,1) 0%, rgba(248,249,250,0) 100%);
}

.logo-slider-track {
    display: flex;
    animation: logo-scroll 25s linear infinite;
    width: calc(200px * 14);
}

.logo-slide {
    height: 80px;
    width: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logo-slide img {
    max-width: 120px;
    max-height: 60px;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.logo-slide img:hover {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.05);
}

@keyframes logo-scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(calc(-200px * 7));
    }
}

/* İletişim */
.contact {
    padding: 80px 0;
    background-color: #f5f5f5;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 50px;
}

.contact-info h3 {
    color: #41C0F0;
    margin-bottom: 20px;
}

.contact-details {
    margin-bottom: 30px;
}

.contact-details p {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.contact-details i {
    margin-right: 10px;
    color: #41C0F0;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background-color: #41C0F0;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s;
}

.social-links a:hover {
    background-color: #ff7f00;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

/* Footer */
footer {
    background-color: #222;
    color: #fff;
    padding: 50px 0 20px;
    position: relative;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 30px;
}

.footer-col h4 {
    color: #41C0F0;
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: #ff7f00;
}

.copyright {
    text-align: center;
    padding-top: 20px 0;
    margin-top: 30px;
    border-top: 1px solid #444;
    color: #ccc;
}

.copyright p {
    margin: 0;
    color: #bdc3c7;
    font-size: 14px;
}

/* Responsive Tasarım */
@media (max-width: 968px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-img {
        max-width: 500px;
        margin: 0 auto;
    }

    .feature {
        flex-direction: column;
        text-align: center;
    }

    .feature-icon {
        margin-right: 0;
        margin-bottom: 15px;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
    }
    
    nav ul {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 0 10px 10px;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .logo-slide {
        width: 150px;
    }
    
    .logo-slider-track {
        width: calc(150px * 14);
    }
    
    @keyframes logo-scroll {
        0% {
            transform: translateX(0);
        }
        100% {
            transform: translateX(calc(-150px * 7));
        }
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 28px;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    
    .logo-text {
        font-size: 16px;
    }
    
    .project-details-menu ul li a {
        padding: 8px;
        font-size: 14px;
    }
}