/* ================================
   Layout.css - 布局相关样式
   ================================ */

/* 现代化头部导航栏 */
.header {
    padding-top: 15px;
    padding-bottom: 15px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: #2c3e50;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.1),
        0 2px 8px rgba(0, 0, 0, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    transition: all 0.3s ease;
}

.header-content-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1300px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
    overflow: visible;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo {
    width: 64px;
    height: 64px;
}

.site-title {
    font-size: 24px;
    margin-left: 10px;
    color: #ff6600;
    font-weight: bold;
}

.main-nav {
    display: flex;
    align-items: center;
    overflow: visible;
}

/* 现代化导航项 */
.nav-item {
    padding: 12px 18px;
    margin: 0 4px;
    color: #2c3e50;
    border-radius: 12px;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    font-weight: 500;
    overflow: hidden;
}

/* 有下拉菜单的导航项允许溢出显示 - 使用更精确的选择器 */
.nav-item.dropdown {
    overflow: visible !important;
}

/* 完全禁用下拉菜单项的动画和悬停效果 */
.nav-item.dropdown::before {
    display: none !important;
}

.nav-item.dropdown:hover,
.nav-item.dropdown.open {
    color: #2c3e50 !important;
    transform: none !important;
    box-shadow: none !important;
}

.nav-item.dropdown .dropdown-toggle {
    color: #2c3e50 !important;
}

.nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.8), rgba(118, 75, 162, 0.8));
    transition: left 0.4s ease;
    z-index: -1;
}

.nav-item.active::before,
.nav-item:hover::before {
    left: 0;
}

.nav-item.active,
.nav-item:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.nav-item.search {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.nav-item.search:hover {
    color: #fff;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

/* 子导航栏 */
.sub-nav {
    background-color: #f9f9f9;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hot-tags {
    display: flex;
    align-items: center;
}

.hot-label {
    color: #ff6600;
    font-weight: bold;
    margin-right: 10px;
}

.hot-tags a {
    margin-right: 15px;
    color: #666;
    font-size: 14px;
    position: relative;
}

.hot-tags a:after {
    content: ">";
    margin-left: 5px;
    color: #ccc;
}

.category-tabs {
    display: flex;
}

.category-tabs a {
    padding: 5px 12px;
    margin: 0 2px;
    color: #666;
    font-size: 14px;
    border-radius: 3px;
}

.category-tabs a.active {
    color: #3366cc;
    font-weight: bold;
}

/* 主要内容布局 */
.main-content-area {
    display: flex;
    gap: 30px;
    margin: 30px 20px;
}

.content-modules {
    flex: 1;
    min-width: 0;
}

.sidebar {
    width: 300px;
    flex-shrink: 0;
}

/* 现代化页脚 */
footer,
.footer {
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.95), rgba(52, 73, 94, 0.95));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #ecf0f1;
    text-align: center;
    padding: 30px 0;
    flex-shrink: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
}

footer::before,
.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #667eea, #764ba2, #f093fb, #f5576c);
    background-size: 400% 100%;
    animation: gradientMove 8s ease infinite;
}

footer p,
.footer p {
    margin: 8px 0;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.9);
    transition: color 0.3s ease;
}

footer a,
.footer a {
    color: #667eea;
    transition: all 0.3s ease;
}

footer a:hover,
.footer a:hover {
    color: #f093fb;
    text-shadow: 0 0 8px rgba(240, 147, 251, 0.5);
}

@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 汉堡菜单按钮 */
.nav-toggle {
    display: none;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    padding: 12px;
    cursor: pointer;
    z-index: 1001;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
}

.nav-toggle:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.nav-toggle:active {
    transform: scale(0.95);
}

.hamburger {
    display: block;
    position: relative;
    width: 28px;
    height: 3px;
    background: #2d3748;
    border-radius: 3px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transform-origin: center;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 28px;
    height: 3px;
    background: #2d3748;
    border-radius: 3px;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transform-origin: center;
}

.hamburger::before {
    top: -9px;
}

.hamburger::after {
    bottom: -9px;
}

/* 菜单打开状态的汉堡动画 */
.header.nav-open .hamburger {
    background: transparent;
    transform: rotate(180deg);
}

.header.nav-open .hamburger::before {
    top: 0;
    transform: rotate(45deg);
    background: #667eea;
}

.header.nav-open .hamburger::after {
    bottom: 0;
    transform: rotate(-45deg);
    background: #667eea;
}