* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
}
a {text-decoration: none}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header & Menu */
header {
    height: 70px;
    width: 100%;
    position: fixed;
    top: 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 1000;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    padding: 0 15px;
}

.logo_div{height: 50px}
.logo_div a{text-decoration: none; color: #176ba9; display: inline-block; position: relative}
.logo_img {width: 50px; height: 50px;}
.logo_div span{text-shadow: 0 0 1px #176ba9; font-weight: bolder; display: inline-block; position: absolute; top: 12px; left: 52px; font-size: 1.3rem }

.nav-menu {
    display: flex;
    list-style: none;
    font-size: 16px;
}

.nav-menu li {
    margin-left: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: #176ba9;
    text-shadow: 0 0 1px;
}

.btn-login {
    background-color: #176ba9;
    color: #fff !important;
    padding: 10px 20px;
    border-radius: 5px;
}

/* Main Sections */
.section {
    padding: 100px 0; /* Khoảng cách để không bị đè bởi Header */
    min-height: 80vh;
    display: flex;
    align-items: center;
    text-align: center;
}

.block-white {
    background-color: #ffffff;
}

.block-light {
    background-color: #f9f9f9; /* Màu nền nhẹ để phân biệt các khối */
}

h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: #007bff;
}

/* Footer */
footer {
    background-color: #f0f0f0;
    color: #333;
    padding: 30px 0;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.5);
}
/* Pricing Section Styles */
.section-title {
    font-size: 2.0rem;
    color: #176ba9;
    margin-bottom: 50px;
    text-align: center;
    font-weight: normal;
    text-shadow: 0 0 1px #176ba9;
    letter-spacing: 1px;
}

.pricing-grid {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap; /* Tự động xuống dòng trên màn hình nhỏ */
}

.pricing-card {
    background: #fff;
    border: 1px solid #e1e1e1;
    border-radius: 15px;
    padding: 40px 15px;
    width: 275px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    margin: 10px 0;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 123, 255, 0.15);
    border-color: #007bff;
}

/* Gói Nâng Cao Nổi Bật */
.pricing-card.popular {
    border: 2px solid #007bff;
    transform: scale(1.05);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-10px);
}

.badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: #007bff;
    color: #fff;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.pricing-card h3 {
    margin-bottom: 20px;
    color: #333;
    font-size: 1.4rem;
}

.price {
    font-size: 2rem;
    font-weight: bold;
    color: #007bff;
    margin-bottom: 25px;
}

.price span {
    font-size: 1rem;
    margin-left: 5px;
}

.features {
    list-style: none;
    padding: 0;
    margin-bottom: 30px;
    text-align: left;
    flex-grow: 1; /* Đẩy nút bấm xuống đáy đồng đều */
}

.features li {
    padding: 10px 0;
    border-bottom: 1px solid #f1f1f1;
    font-size: 0.9rem;
    color: #555;
}

.features li::before {
    content: "✓";
    color: #28a745;
    margin-right: 10px;
    font-weight: bold;
}

.features li.not-included {
    color: #aaa;
    text-decoration: line-through;
}

.features li.not-included::before {
    content: "✕";
    color: #dc3545;
}

.btn-select {
    display: block;
    padding: 12px 25px;
    background-color: #176ba9;
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
    transition: background 0.3s;
}

.btn-select:hover {
    background-color: #0056b3;
}

/* Intro Section - Giới thiệu */
.intro-section {
    position: relative;
    height: 100vh;
    min-height: 800px;
    background-image: url('../uploads/images/image_intro.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    overflow: hidden;
}

/* Khối chữ được căn chỉnh lại để hài hòa với không gian mới */
.intro-text-box {
    max-width: 600px;
    text-align: right;
    padding: 50px 40px;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(1px); /* Tăng độ mờ kính cho sang trọng */
    border-radius: 15px;
    z-index: 2;
    animation: fadeInRight 2s ease-out;

}

.intro-content {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: flex-end; /* Nội dung nằm bên phải theo yêu cầu */
    width: 100%;
}

/* Tiêu đề phụ */
.sub-title {
    font-size: 1.1rem;
    font-weight: 600;
    text-transform: uppercase;
    color: #ffffff; /* Xanh Cyan tương đồng với chi tiết trong ảnh */
    margin-bottom: 20px;
}

/* Tiêu đề chính */
.main-title {
    font-size: 2.2rem;
    font-weight: normal;
    line-height: 1.2;
    margin-bottom: 25px;
    color: #ffffff;
    text-shadow: 0 0 1px #ffffff;
}

/* Đoạn mô tả */
.description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin: 40px 0px;
    color: #ffffff;
}

.description strong {
    color: #176ba9;
    font-weight: 1000;
    text-shadow: 0 0 1px #FFFFFF;
}

/* Nút bấm */
.intro-btns {
    display: flex;
    justify-content: flex-end;
    gap: 20px;
}

.btn-primary {
    background-color: #176ba9;
    color: #fff;
    padding: 10px;
    border-radius: 30px; /* Bo tròn hơn cho hiện đại */
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
    width: 45%; text-align: center;
}

.btn-outline {
    border: 2px solid #176ba9;
    color: #FFFFFF;
    padding: 10px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    width: 45%; text-align: center;
}

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

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

/* Hiệu ứng trượt từ phải sang */
@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(160px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Features Section - Tính năng */
.section-subtitle {
    text-align: center;
    color: #666;
    margin-top: -40px;
    margin-bottom: 50px;
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    /* Tự động chia thành 3 cột đều nhau trên màn hình lớn */
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-top: 20px;
}

.feature-item {
    background: #ffffff;
    padding: 35px 25px;
    border-radius: 15px;
    text-align: center;
    border: 1px solid #f0f0f0;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.feature-item:hover {
    transform: translateY(-8px);
    border-color: #007bff;
    box-shadow: 0 10px 25px rgba(0, 123, 255, 0.08);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.feature-item:hover .feature-icon {
    transform: scale(1.2);
}

.feature-item h3 {
    font-size: 1.4rem;
    color: #1a1a1a;
    margin-bottom: 15px;
    font-weight: 700;
}

.feature-item p {
    color: #666;
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Màu sắc nhấn nhá cho tiêu đề block */
#tinh-nang .section-title {
    position: relative;
    padding-bottom: 15px;
}

#tinh-nang .section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: #176ba9;
    border-radius: 2px;
}

/* Guide Section Styles */
.guide-grid {
    display: grid;
    grid-template-columns: 1fr 1fr; /* Chia 2 cột đều nhau */
    gap: 40px;
    margin-top: 30px;
}

.guide-column {
    background: #fff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    border: 1px solid #f0f0f0;
}

.guide-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f8ff;
}

.guide-header h3 {
    color: #176ba9;
    font-size: 1.4rem;
}

.guide-icon {
    font-size: 2rem;
}

.guide-list {
    list-style: none;
    padding: 0;
}

.guide-list li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 20px;
    color: #555;
    line-height: 1.6;
    text-align: left;
}

/* Số thứ tự các bước */
.step-num {
    background-color: #176ba9;
    color: #fff;
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    font-size: 0.9rem;
}

/* Responsive cho điện thoại */
@media (max-width: 768px) {
    .guide-grid {
        grid-template-columns: 1fr;
    }
}

.main-footer {
    background-color: #ffffff;
    padding: 60px 0 20px;
    border-top: 1px solid #eee;
    color: #444;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    color: #007bff;
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-weight: 700;
}

/* List style */
.contact-info, .policy-links {
    list-style: none;
    padding: 0;
}

.contact-info li, .policy-links li {
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.policy-links li a {
    text-decoration: none;
    color: #666;
    transition: all 0.3s ease;
}

.policy-links li a:hover {
    color: #007bff;
    padding-left: 5px;
}

/* Logo & Social */
.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
}


.sales-text {
    font-weight: 700;
    font-size: 1.4rem;
    color: #007bff;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-icon {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    color: #007bff;
    font-weight: bold;
    transition: all 0.3s ease;
}

/* Footer Bottom */
.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #f5f5f5;
    font-size: 0.85rem;
    color: #999;
}

/* Điều chỉnh linh hoạt cho các màn hình nhỏ hơn */
@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr); /* 2 cột cho máy tính bảng */
    }
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr; /* 1 cột cho điện thoại */
    }
    .btn-outline,.btn-primary {font-size: 14px}
    .main-title{font-size: 1.4rem}
    .nav-menu li{margin-left: 12px}
    .nav-menu li a{font-size: 14px}
    .btn-login{padding: 10px 8px; font-size: 12px !important}
    .logo_div{height: 38px}
    .logo_img{width: 38px; height: 38px}
    .guide-header h3{font-size: 1.2rem}
    .pricing-card {width: 95%}
    .intro-text-box{padding: 40px 30px;}
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-logo, .social-links {
        justify-content: center;
    }
}

@media (max-width: 400px) {

    .btn-outline,.btn-primary {font-size: 12px}
    .nav-menu li{margin-left: 10px}
    .nav-menu li a{font-size: 12px}
    .btn-login{padding: 8px 6px; font-size: 12px !important}
    .logo_div{height: 36px}
    .logo_img{width: 36px; height: 36px}


}