/* ===== SUBARU BRAND GUIDE ===== */
/* Colors: Subaru Blue #1A3C6E, Graphite Gray #3E3E3E, Adventure Orange #E67E22, Snowy White #F5F5F5 */

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

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background-color: #F5F5F5;
    color: #1e2a3a;
    line-height: 1.5;
}

#container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    box-shadow: 0 0 20px rgba(0,0,0,0.05);
}

/* Header */
header {
    background: #1A3C6E;
    color: white;
    padding: 1rem 2rem;
    border-bottom: 4px solid #E67E22;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.site-logo {
    height: 60px;
    width: auto;
}

header h1 {
    font-size: 1.8rem;
    letter-spacing: 1px;
}

/* 持久导航 (全局) */
nav.global-nav {
    background: #3E3E3E;
    padding: 0.75rem 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    border-bottom: 1px solid #ddd;
}

nav.global-nav a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: 0.2s;
}

nav.global-nav a:hover {
    color: #E67E22;
}

/* 两栏布局 */
.main-grid {
    display: flex;
    flex-wrap: wrap;
}

#sidebar {
    width: 260px;
    background: #ececec;
    padding: 1.5rem;
    border-right: 1px solid #ccc;
}

.sidebar-box {
    background: white;
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.sidebar-box h3 {
    color: #1A3C6E;
    border-left: 4px solid #E67E22;
    padding-left: 0.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.sidebar-box ul {
    list-style: none;
    padding-left: 0;
}

.sidebar-box li {
    margin-bottom: 0.5rem;
}

.sidebar-box a {
    color: #1A3C6E;
    text-decoration: none;
}

.sidebar-box a:hover {
    text-decoration: underline;
    color: #E67E22;
}

main {
    flex: 1;
    padding: 2rem;
    background: white;
}

main h2 {
    color: #1A3C6E;
    border-bottom: 2px solid #E67E22;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

main h3 {
    color: #3E3E3E;
    margin: 1.2rem 0 0.5rem 0;
}

main img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1rem 0;
}

/* 返回顶部 */
.back-to-top {
    text-align: right;
    margin-top: 2rem;
}

.back-to-top a {
    background: #1A3C6E;
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 30px;
    text-decoration: none;
    font-size: 0.8rem;
}

.back-to-top a:hover {
    background: #E67E22;
}

/* Footer 辅助导航 */
footer {
    background: #1A3C6E;
    color: #ccc;
    padding: 2rem;
    margin-top: 2rem;
    font-size: 0.85rem;
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1rem;
    justify-content: center;
}

.footer-nav a {
    color: white;
    text-decoration: none;
}

.footer-nav a:hover {
    text-decoration: underline;
}

footer p {
    text-align: center;
    margin-top: 1rem;
}

/* 响应式 */
@media (max-width: 768px) {
    .main-grid {
        flex-direction: column;
    }
    #sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid #ccc;
    }
    .header-content {
        justify-content: center;
        text-align: center;
    }
    nav.global-nav {
        justify-content: center;
    }
}