/* ======================================
   Knowledge System Corporate Style
====================================== */

body {
    margin: 0;
    font-family: 'Noto Sans JP', sans-serif;
    background: #f5f6f8;
    color: #2b2b2b;
    line-height: 1.9;
}

/* ===== Header ===== */

header {
    background: #ffffff;
    border-bottom: 1px solid #e5e8ec;
    padding: 25px 60px 15px 60px;
}

.header-inner {
    max-width: 1100px;
    margin: auto;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo-img {
    height: 40px;
    width: auto;
}

.company-ja,
.brand-name {
    font-size: 18px;
    font-weight: 600;
    color: #1d2c3c;
}

.lang-switch a {
    font-size: 13px;
    text-decoration: none;
    margin-left: 12px;
    color: #555;
}

.lang-switch a.active {
    font-weight: 600;
    color: #1d2c3c;
}

/* ===== Navigation ===== */

nav {
    margin-top: 18px;
}

nav a {
    text-decoration: none;
    margin-right: 28px;
    font-size: 14px;
    color: #555;
    transition: color 0.2s ease;
}

nav a:hover {
    color: #1d2c3c;
}

/* ===== Main ===== */

main {
    max-width: 900px;
    margin: 80px auto;
    padding: 0 40px;
}

h1 {
    font-size: 28px;
    font-weight: 600;
    color: #1d2c3c;
    margin-bottom: 40px;
    padding-left: 18px;
    border-left: 4px solid #1d2c3c;
}

h2 {
    font-size: 18px;
    font-weight: 600;
    color: #1d2c3c;
    margin-top: 50px;
    margin-bottom: 15px;
}

p {
    margin-bottom: 22px;
    font-size: 15px;
}

ul {
    padding-left: 20px;
}

ul li {
    margin-bottom: 10px;
    font-size: 14px;
}

/* ===== Table ===== */

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 30px;
    background: #ffffff;
    border: 1px solid #e5e8ec;
}

th, td {
    padding: 14px;
    border-bottom: 1px solid #e5e8ec;
    font-size: 14px;
}

th {
    width: 180px;
    background: #f1f3f6;
    font-weight: 500;
}

/* ===== Footer ===== */

footer {
    margin-top: 80px;
    background: #ffffff;
    border-top: 1px solid #e5e8ec;
    padding: 25px;
    text-align: center;
    font-size: 12px;
    color: #888;
}

/* ===== Responsive ===== */

@media (max-width: 900px) {
    header {
        padding: 20px;
    }

    main {
        margin: 50px auto;
        padding: 0 20px;
    }

    .logo-img {
        height: 34px;
    }
}

.tech-hero {
    height: 200px;
    background:
        linear-gradient(
            rgba(245,246,248,0.92),
            rgba(245,246,248,0.92)
        ),
        url("assets/img/pcb-dark.jpg");
    background-size: cover;
    background-position: center;
}

.tech-hero-program {
    height: 200px;
    background:
        linear-gradient(
            rgba(245,246,248,0.92),
            rgba(245,246,248,0.92)
        ),
        url("assets/img/program-dark.jpg");
    background-size: cover;
    background-position: center;
}
/* ===== 無地ヒーロー帯 ===== */

.page-hero {
    height: 200px;
    background: #f5f6f8;
}