/* ============================================================
   日本語版 サイト専用 CSS
   sumken.com.tw / ja
   ============================================================ */

:root {
    --ja-primary:   #0f4c8a;
    --ja-primary-d: #0a3865;
    --ja-accent:    #d72828;
    --ja-text:      #1b1f24;
    --ja-muted:     #6b7280;
    --ja-border:    #e5e7eb;
    --ja-bg:        #fafbfc;
    --ja-bg-alt:    #f4f6f8;
}

.ja-body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Yu Gothic UI', sans-serif;
    color: var(--ja-text);
    background: #fff;
    line-height: 1.75;
}

.ja-body a { color: var(--ja-primary); }
.ja-body a:hover { color: var(--ja-primary-d); }

/* Header */
.ja-header {
    background: #fff;
    border-bottom: 1px solid var(--ja-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 2px rgba(15, 20, 25, .04);
}
.ja-brand { color: var(--ja-text); }
.ja-brand-text {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: .5px;
}
.ja-nav {
    display: flex;
    gap: 32px;
}
.ja-nav-link {
    color: var(--ja-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: color .15s ease, border-color .15s ease;
}
.ja-nav-link:hover { color: var(--ja-primary); }
.ja-nav-link.is-active {
    color: var(--ja-primary);
    border-bottom-color: var(--ja-primary);
}
.ja-lang-btn {
    display: inline-flex;
    align-items: center;
    padding: 7px 14px;
    background: var(--ja-bg-alt);
    color: var(--ja-text);
    border-radius: 999px;
    font-size: 13px;
    text-decoration: none;
    transition: background .15s ease;
}
.ja-lang-btn:hover { background: #e5e9ee; color: var(--ja-primary); }

.ja-mobile-nav {
    padding: 12px 0;
    border-top: 1px solid var(--ja-border);
}
.ja-mobile-nav-link {
    display: block;
    padding: 12px 4px;
    color: var(--ja-text);
    text-decoration: none;
    border-bottom: 1px solid var(--ja-border);
    font-weight: 500;
}
.ja-mobile-nav-link.is-active { color: var(--ja-primary); }

/* Main */
.ja-main { min-height: 60vh; }

/* Hero（首頁） */
.ja-hero {
    background: linear-gradient(135deg, var(--ja-primary) 0%, var(--ja-primary-d) 100%);
    color: #fff;
    padding: 80px 0;
}
.ja-hero h1 {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 16px;
}
.ja-hero p {
    font-size: 17px;
    opacity: .92;
    max-width: 720px;
}
.ja-hero .btn {
    background: #fff;
    color: var(--ja-primary);
    padding: 10px 28px;
    font-weight: 600;
    border-radius: 6px;
}

/* Section */
.ja-section { padding: 64px 0; }
.ja-section-title {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--ja-text);
}
.ja-section-sub {
    color: var(--ja-muted);
    margin-bottom: 32px;
}

/* Card grid */
.ja-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}
.ja-card {
    background: #fff;
    border: 1px solid var(--ja-border);
    border-radius: 12px;
    padding: 24px;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    display: flex;
    flex-direction: column;
}
.ja-card:hover {
    transform: translateY(-3px);
    border-color: #d5d9df;
    box-shadow: 0 12px 28px -16px rgba(15, 20, 25, .25);
}
.ja-card-tag {
    display: inline-block;
    background: var(--ja-bg-alt);
    color: var(--ja-primary);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 3px 10px;
    border-radius: 999px;
    margin-bottom: 12px;
    align-self: flex-start;
}
.ja-card-title {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.5;
    margin: 0 0 10px;
}
.ja-card-title a {
    color: var(--ja-text);
    text-decoration: none;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.ja-card-title a:hover { color: var(--ja-primary); }
.ja-card-summary {
    color: var(--ja-muted);
    font-size: 14px;
    line-height: 1.7;
    margin: 0 0 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}
.ja-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 16px;
    color: var(--ja-muted);
    font-size: 13px;
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid var(--ja-border);
}
.ja-card-meta i { margin-right: 4px; color: var(--ja-primary); }

/* Detail */
.ja-detail {
    max-width: 880px;
    margin: 0 auto;
}
.ja-detail-title {
    font-size: clamp(24px, 3vw, 34px);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 16px;
}
.ja-detail-meta {
    color: var(--ja-muted);
    font-size: 14px;
    padding-bottom: 16px;
    margin-bottom: 28px;
    border-bottom: 1px solid var(--ja-border);
}
.ja-detail-meta span { margin-right: 20px; }
.ja-detail-meta i { margin-right: 6px; color: var(--ja-primary); }
.ja-detail-body {
    font-size: 16px;
    line-height: 1.9;
}
.ja-detail-body img { max-width: 100%; height: auto; border-radius: 6px; }
.ja-detail-body h2, .ja-detail-body h3 {
    margin-top: 32px;
    margin-bottom: 12px;
    font-weight: 700;
}
.ja-detail-body p { margin-bottom: 16px; }
.ja-detail-body ul, .ja-detail-body ol { margin-bottom: 16px; padding-left: 24px; }

/* Signup form */
.ja-signup-card {
    background: var(--ja-bg);
    border: 1px solid var(--ja-border);
    border-radius: 12px;
    padding: 32px;
    margin-top: 40px;
}
.ja-signup-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
}
.ja-signup-card .ja-signup-sub {
    color: var(--ja-muted);
    font-size: 14px;
    margin-bottom: 24px;
}
.ja-form-label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 14px;
}
.ja-form-label .required { color: var(--ja-accent); margin-left: 4px; }
.ja-form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--ja-border);
    border-radius: 6px;
    font-size: 15px;
    font-family: inherit;
    background: #fff;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.ja-form-control:focus {
    outline: none;
    border-color: var(--ja-primary);
    box-shadow: 0 0 0 3px rgba(15, 76, 138, .12);
}
.ja-form-control[disabled] { background: #f4f6f8; }
textarea.ja-form-control { min-height: 120px; resize: vertical; }
.ja-btn-primary {
    background: var(--ja-primary);
    color: #fff;
    border: none;
    padding: 12px 32px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: background .15s ease;
}
.ja-btn-primary:hover { background: var(--ja-primary-d); }
.ja-btn-primary[disabled] { opacity: .6; cursor: not-allowed; }
.ja-btn-secondary {
    display: inline-block;
    background: transparent;
    color: var(--ja-text);
    border: 1px solid var(--ja-border);
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: background .15s ease;
}
.ja-btn-secondary:hover { background: var(--ja-bg-alt); color: var(--ja-primary); }

.ja-alert {
    padding: 14px 18px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 20px;
}
.ja-alert-success { background: #ecfdf3; color: #027a48; border: 1px solid #abefc6; }
.ja-alert-error   { background: #fef3f2; color: #b42318; border: 1px solid #fecdca; white-space: pre-line; }

/* Empty state */
.ja-empty {
    text-align: center;
    padding: 80px 20px;
    color: var(--ja-muted);
}
.ja-empty i { font-size: 48px; color: #cbd5e1; margin-bottom: 16px; }

/* Page header */
.ja-page-header {
    background: var(--ja-bg-alt);
    padding: 48px 0;
    text-align: center;
}
.ja-page-header h1 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    margin-bottom: 8px;
}
.ja-page-header .lead { color: var(--ja-muted); margin: 0; }

/* Breadcrumb */
.ja-breadcrumb {
    font-size: 13px;
    color: var(--ja-muted);
    margin-bottom: 24px;
}
.ja-breadcrumb a { color: var(--ja-muted); text-decoration: none; }
.ja-breadcrumb a:hover { color: var(--ja-primary); }
.ja-breadcrumb .sep { margin: 0 8px; opacity: .5; }

/* Footer */
.ja-footer {
    background: #fff;
    border-top: 1px solid var(--ja-border);
    margin-top: 80px;
}
.ja-footer h6 { color: var(--ja-text); letter-spacing: 1px; font-size: 13px; }
.ja-footer a.text-muted:hover { color: var(--ja-primary) !important; }

/* Responsive tweaks */
@media (max-width: 768px) {
    .ja-section { padding: 40px 0; }
    .ja-hero { padding: 60px 0; }
    .ja-signup-card { padding: 24px 20px; }
}