/* Cơ bản, sạch sẽ, phù hợp website doanh nghiệp */
*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #1f2933;
    background: #1a1f2e;
}

a {
    color: #3b82f6;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 16px;
}

.site-header {
    background: #ffffff;
    border-bottom: 1px solid #e0e7ff;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
}

.logo-text {
    font-weight: 700;
    font-size: 20px;
    color: #111827;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 24px;
    margin: 0;
    padding: 0;
}

.main-nav a {
    font-weight: 500;
    color: #374151;
}

.main-nav a:hover {
    color: #3b82f6;
}

.page {
    padding: 40px 0 64px;
}

.hero {
    position: relative;
    padding: 52px 0 56px;
    color: #e5e7eb;
}

.hero-visual {
    position: relative;
    max-width: 1040px;
    margin: 0 auto;
    border-radius: 26px;
    overflow: hidden;
    box-shadow: 0 30px 80px rgba(26,31,46,0.75);
}

.hero-visual img {
    width: 100%;
    display: block;
}

.hero-text {
    position: absolute;
    left: 50%;
    top: 60%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 920px;
    padding: 18px 24px 20px;
    box-sizing: border-box;
}

.hero-overlay {
    background: linear-gradient(135deg, rgba(26,31,46,0.85), rgba(26,31,46,0.60));
    border-radius: 18px;
    box-shadow: 0 18px 50px rgba(26,31,46,0.75);
}

.hero-text h1 {
    font-size: 36px;
    margin: 10px 0 18px;
    color: #f9fafb;
}

.hero-text p {
    font-size: 16px;
    margin-bottom: 12px;
    color: #e5e7eb;
}

.hero-list {
    margin: 10px 0 22px;
    padding-left: 18px;
}

.hero-list li {
    margin-bottom: 4px;
}

.hero-image img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
    background: #e5e7eb;
}

.hero-image-frame {
    border-radius: 22px;
    padding: 10px;
    background: linear-gradient(145deg, rgba(59,130,246,0.30), rgba(56,189,248,0.08));
    box-shadow: 0 24px 60px rgba(26,31,46,0.65);
}

.hero-eyebrow {
    display: inline-flex;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(26,31,46,0.75);
    border: 1px solid rgba(96,165,250,0.5);
    font-size: 12px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #c7d2fe;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 8px;
}

.hero-note {
    font-size: 13px;
    color: #9ca3af;
}

.section {
    padding: 24px 0;
}

.section h2 {
    font-size: 24px;
    margin-bottom: 16px;
    color: #111827;
}

.grid {
    display: grid;
    gap: 24px;
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    padding: 16px;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.04);
}

.card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 12px;
    background: #e5e7eb;
}

.icon-box {
    background: #ffffff;
    border-radius: 12px;
    padding: 16px 18px;
    border: 1px solid #e5e7eb;
}

.icon-box h3 {
    margin-top: 0;
    margin-bottom: 8px;
    font-size: 18px;
}

.section-cta {
    text-align: center;
}

.cta-box {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: #ffffff;
    border-radius: 16px;
    padding: 28px 20px;
    max-width: 760px;
    margin: 0 auto;
}

.cta-box h2 {
    color: #ffffff;
    margin-top: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.05s ease;
}

.btn-primary {
    background: #3b82f6;
    color: #ffffff;
    box-shadow: 0 8px 18px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
    background: #1d4ed8;
    box-shadow: 0 10px 22px rgba(59, 130, 246, 0.45);
    transform: translateY(-1px);
}

.btn-secondary {
    background: #ffffff;
    color: #1f2933;
}

.btn-secondary:hover {
    background: #e5edff;
}

.btn-ghost {
    background: transparent;
    color: #e5e7eb;
    border: 1px solid rgba(148, 163, 184, 0.8);
    box-shadow: none;
}

.btn-ghost:hover {
    background: rgba(15,23,42,0.9);
    border-color: #e5e7eb;
}

.site-footer {
    background: #020617;
    color: #d1d5db;
    margin-top: 24px;
    font-size: 14px;
}

.footer-inner {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    padding: 24px 0;
}

.footer-col h4 {
    margin-top: 0;
    margin-bottom: 8px;
    color: #f9fafb;
}

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links li {
    margin-bottom: 4px;
}

.footer-links a {
    color: #e5e7eb;
}

.footer-links a:hover {
    color: #93c5fd;
}

.footer-bottom {
    border-top: 1px solid #111827;
    padding: 10px 0;
    text-align: center;
}

.section-heading {
    text-align: left;
    max-width: 720px;
    margin: 0 auto 16px auto;
}

.section-heading h1 {
    margin-bottom: 8px;
    font-size: 28px;
    color: #111827;
}

.section-subtitle {
    margin-top: -6px;
    margin-bottom: 18px;
    font-size: 14px;
    color: #6b7280;
}

.page-contact .section-contact {
    max-width: 980px;
    margin: 0 auto;
}

.contact-form {
    background: #ffffff;
    border-radius: 12px;
    padding: 18px 16px 20px;
    border: 1px solid #e5e7eb;
}

.form-row {
    margin-bottom: 12px;
}

.form-row label {
    display: block;
    font-weight: 500;
    margin-bottom: 4px;
}

.form-row input,
.form-row textarea {
    width: 100%;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid #d1d5db;
    font-family: inherit;
    font-size: 14px;
}

.form-row input:focus,
.form-row textarea:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 1px rgba(59, 130, 246, 0.1);
}

.form-note {
    font-size: 12px;
    color: #6b7280;
    margin-top: 0;
    margin-bottom: 12px;
}

.placeholder {
    color: #6b7280;
}

.section-privacy {
    max-width: 900px;
    margin: 0 auto;
    background: #ffffff;
    border-radius: 12px;
    padding: 20px 18px 22px;
    border: 1px solid #e5e7eb;
}

.section-privacy h2 {
    margin-top: 14px;
    margin-bottom: 8px;
    font-size: 18px;
}

.section-privacy ul {
    padding-left: 18px;
    margin-top: 4px;
    margin-bottom: 8px;
}

.page-services .section {
    padding-top: 16px;
}

.section-alt {
    background: #e5e7eb33;
}

@media (max-width: 768px) {
    .page {
        padding: 24px 0 40px;
    }

    .hero {
        padding: 24px 0 30px;
    }

    .hero-visual {
        border-radius: 18px;
        box-shadow: 0 18px 46px rgba(26,31,46,0.75);
    }

    .hero-text {
        position: static;
        transform: none;
        margin-top: -72px;
        padding: 14px 14px 16px;
        max-width: 100%;
    }

    .hero-overlay {
        border-radius: 14px;
    }

    .hero-text h1 {
        font-size: 26px;
    }

    .hero-eyebrow {
        font-size: 11px;
    }

    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .main-nav ul {
        gap: 14px;
        flex-wrap: wrap;
        font-size: 14px;
    }
}