/* 额外的 changelog 专用样式，兼容 root.css 变量 */
.sidebar-col {
    background-color: var(--gj-paper);
    border-right: 1px solid var(--gj-card-border);
    position: sticky;
    top: 0;
    height: calc(100vh - 70px);
    overflow-y: auto;
}
.changelog-sidebar {
    padding: 1.2rem 0.8rem;
}
.sidebar-header h5 {
    color: var(--gj-jade);
}
.version-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.nav-year-group {
    margin-bottom: 0.8rem;
}
.year-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    background: transparent;
    border: none;
    padding: 0.5rem 0.7rem;
    font-weight: 600;
    color: var(--gj-ink);
    border-radius: 28px;
    transition: background 0.2s;
}
.year-header:hover {
    background-color: var(--gj-glow);
}
.year-header .chevron {
    transition: transform 0.2s;
}
.month-list {
    padding-left: 1.2rem;
    margin-top: 0.25rem;
}
.month-group {
    margin: 0.5rem 0;
}
.month-title {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gj-gold);
    padding: 0.2rem 0;
    letter-spacing: 1px;
}
.version-list {
    list-style: none;
    padding-left: 1rem;
    margin: 0;
}
.version-list li {
    margin: 0.2rem 0;
}
.version-link {
    display: block;
    padding: 0.3rem 0.8rem;
    font-size: 0.85rem;
    color: var(--gj-ink);
    text-decoration: none;
    border-radius: 20px;
    transition: all 0.2s;
}
.version-link:hover {
    background-color: var(--gj-stone);
    color: var(--gj-jade);
    transform: translateX(3px);
}
.version-link.active {
    background-color: var(--gj-jade);
    color: white;
}
/* 右侧内容卡片 */
.changelog-content {
    padding: 2rem 1.5rem;
    min-height: 500px;
}
.welcome-placeholder {
    text-align: center;
    padding: 4rem 1rem;
    background: var(--gj-paper);
    border-radius: 32px;
    border: 1px solid var(--gj-card-border);
}
.welcome-placeholder i {
    font-size: 4rem;
    color: var(--gj-gold-light);
}
.version-detail-card {
    background: var(--gj-paper);
    border-radius: 32px;
    border: 1px solid var(--gj-card-border);
    box-shadow: 0 12px 24px var(--gj-shadow);
    overflow: hidden;
    transition: transform 0.2s;
}
.version-header {
    background: linear-gradient(90deg, var(--gj-jade) 0%, var(--gj-stone) 100%);
    padding: 1rem 1.8rem;
    color: white;
    font-size: 1.3rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
}
[data-bs-theme="dark"] .version-header {
    background: linear-gradient(90deg, #3a6b5e, var(--gj-stone));
    color: var(--gj-ink);
}
.version-date {
    font-size: 0.85rem;
    font-weight: normal;
    background: rgba(0,0,0,0.2);
    padding: 0.2rem 0.8rem;
    border-radius: 40px;
}
.version-body {
    padding: 1.8rem;
}
.changes-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}
.changelog-item {
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--gj-ink);
}
.changelog-item i {
    color: var(--gj-gold);
    font-size: 1.2rem;
}
.version-footer {
    border-top: 1px solid var(--gj-card-border);
    padding: 0.8rem 1.8rem;
    text-align: right;
    font-size: 0.75rem;
    color: var(--gj-gold-light);
}

/* 滚动条优雅 */
.sidebar-col::-webkit-scrollbar {
    width: 4px;
}
.sidebar-col::-webkit-scrollbar-track {
    background: var(--gj-stone);
}
.sidebar-col::-webkit-scrollbar-thumb {
    background: var(--gj-gold);
    border-radius: 4px;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
.spin {
    display: inline-block;
    animation: spin 1s linear infinite;
}

/* ========== 桌面端样式 (≥768px) ========== */
@media (min-width: 768px) {
    .sidebar-col {
        position: sticky;
        top: 0;
        height: calc(100vh - 70px);
        overflow-y: auto;
    }
    .changelog-sidebar {
        display: block !important;
    }
    .mobile-sidebar-toggle,
    .sidebar-overlay {
        display: none !important;
    }
}

/* ========== 移动端样式 (<768px) ========== */
@media (max-width: 767px) {
    /* 侧边栏滑出菜单 */
    .sidebar-col {
        position: fixed;
        left: -85%;
        top: 0;
        width: 80%;
        max-width: 280px;
        height: 100%;
        z-index: 1050;
        transition: left 0.3s ease;
        background-color: var(--gj-paper);
        box-shadow: 2px 0 12px var(--gj-shadow);
    }
    .sidebar-col.mobile-open {
        left: 0;
    }
    .changelog-sidebar {
        height: 100%;
        overflow-y: auto;
    }
    .content-col {
        width: 100%;
        padding-top: 0.5rem;
    }
    /* 移动端导航按钮 */
    .mobile-sidebar-toggle {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        margin: 0.75rem 1rem;
        background: var(--gj-paper);
        border: 1px solid var(--gj-card-border);
        border-radius: 40px;
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
        box-shadow: 0 2px 6px var(--gj-shadow);
    }
    /* 内容区域左右内边距对齐按钮 */
    .changelog-content {
        padding: 0 1rem 1rem 1rem;
    }
    /* 版本卡片顶部间距 */
    .version-detail-card {
        margin-top: 0.5rem;
    }
    .version-header {
        flex-direction: column;
        gap: 0.5rem;
    }
    /* 移动端遮罩层 */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        backdrop-filter: blur(2px);
        z-index: 1040;
        display: none;
    }
    .sidebar-overlay.show {
        display: block;
    }
}