/* navigation.css - 公共导航栏样式 */
/* 导入字体 */
@import url("https://cdn-font.hyperos.mi.com/font/css?family=MiSans_Latin_VF:VF:Latin&display=swap");
@import url("https://cdn-font.hyperos.mi.com/font/css?family=MiSans_VF:VF:Chinese_Simplify,Latin&display=swap");
@import url("https://cdn-font.hyperos.mi.com/font/css?family=MiSans:100,200,300,400,450,500,600,650,700,900:Chinese_Simplify,Latin&display=swap");
@import url("https://cdn-font.hyperos.mi.com/font/css?family=Misans_TC_VF:VF:Chinese_Traditional_TW&display=swap");

/* CSS变量定义 */
:root {
    --primary-color: #9e94d8;
    --secondary-color: #333333;
    --background-color: #f2eefc;
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-bg-hover: rgba(255, 255, 255, 0.9);
    --text-color: #444444;
    --text-secondary: #666666;
    --online-color: #00BFA6;
    --nav-bg: rgba(109, 91, 154, 0.8);
    --nav-bg-scroll: rgba(109, 91, 154, 0.95);
    --button-hover: #b6ade6;
    --accent-color: #f59e0b;
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(158, 148, 216, 0.3);
    --shadow-color: rgba(109, 91, 154, 0.2);
    --shadow-hover: rgba(109, 91, 154, 0.3);
    
    /* 支持系统主题 */
    color-scheme: light dark;
}

/* 深色主题变量 */
.dark-theme {
    --primary-color: #a78bfa;
    --secondary-color: #f1f5f9;
    --background-color: #0f172a;
    --background-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    --card-bg: #1e293b;
    --card-bg-hover: #334155;
    --text-color: #e2e8f0;
    --text-secondary: #cbd5e1;
    --online-color: #10b981;
    --nav-bg: rgba(15, 23, 42, 0.8);
    --nav-bg-scroll: #1e293b;
    --button-hover: #c4b5fd;
    --accent-color: #f59e0b;
    --glass-bg: rgba(30, 41, 59, 0.6);
    --glass-border: rgba(71, 85, 105, 0.3);
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.4);
}

/* 系统深色主题自动应用 */
@media (prefers-color-scheme: dark) {
    :root:not(.dark-theme) {
        --primary-color: #a78bfa;
        --secondary-color: #f1f5f9;
        --background-color: #0f172a;
        --card-bg: #1e293b;
        --text-color: #e2e8f0;
        --nav-bg: rgba(15, 23, 42, 0.8);
        --nav-bg-scroll: #1e293b;
        --button-hover: #c4b5fd;
    }
    
    :root:not(.dark-theme) nav {
        background-color: var(--nav-bg) !important;
    }
    
    :root:not(.dark-theme) nav a {
        color: #e2e8f0 !important;
    }
    
    :root:not(.dark-theme) nav a:hover {
        color: var(--button-hover) !important;
    }
}

/* 深色主题导航栏样式 */
.dark-theme nav {
    background-color: var(--nav-bg);
}

.dark-theme nav.scrolled {
    background: var(--nav-bg-scroll);
}

.dark-theme .nav-links {
    background: var(--nav-bg-scroll);
}

.dark-theme .nav-links.responsive {
    background: var(--nav-bg-scroll);
}

.dark-theme .dropdown-menu {
    background: rgba(30, 41, 59, 0.95);
    border: 1px solid rgba(71, 85, 105, 0.3);
}

.dark-theme .dropdown-item {
    color: #e2e8f0;
}

.dark-theme .dropdown-item:hover {
    background: rgba(71, 85, 105, 0.2);
    color: var(--button-hover);
}

/* 深色主题导航链接样式 */
.dark-theme nav a {
    color: #e2e8f0;
}

.dark-theme nav a:hover {
    color: var(--button-hover);
}

.dark-theme .theme-toggle-btn {
    background: rgba(71, 85, 105, 0.3);
    border: 1px solid rgba(71, 85, 105, 0.5);
    color: #e2e8f0;
}

.dark-theme .theme-toggle-btn:hover {
    background: rgba(71, 85, 105, 0.5);
}

/* 导航栏基础样式 */
nav {
    display: flex;
    align-items: center;
    height: 81px;
    padding: 15px 20px;
    background-color: rgba(0, 0, 0, 0.7);
    position: fixed;
    width: 100%;
    z-index: 100;
    top: 0;
}

nav.scrolled {
    background: var(--nav-bg-scroll);
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

/* 导航链接通用样式 */
nav a {
    display: inline-block;
    margin: 20px;
    color: white;
    text-decoration: none;
    font-size: 1.1em;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--button-hover);
}

/* Logo容器样式 */
.logo-container {
    display: flex;
    align-items: center;
    margin-left: 20px;
}

.logo-container img {
    height: 50px;
    width: auto;
}

.right-align {
    margin-left: auto;
    margin-right: 20px;
}

.logo {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Logo文字样式 */
.logo-and-text {
    display: inline-flex;
    align-items: center;
    color: white;
    text-decoration: none;
    font-size: 1.1em;
    transition: color 0.3s;
    margin-left: 15px;
}

.logo-and-text:hover {
    color: var(--button-hover);
}

.logo-and-text svg {
    margin-left: 8px;
    width: 16px;
    height: 16px;
}

.logo-and-text {
    width: 130px;
    margin-right: auto; 
    margin-left: 20px;
}

/* 导航链接容器 */
.AAA {
    margin-right: 1.2em;
    margin-left: auto;
}

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

/* 汉堡菜单按钮 */
.menu-button {
    display: none;
    position: absolute;
    right: 20px;
    top: 19.4px;
    color: white;
    font-size: 1.1em;
    cursor: pointer;
    z-index: 102;
}

/* 主题切换按钮 */
.nav-theme-toggle {
    display: flex;
    align-items: center;
    margin: 0 15px;
    margin-right: auto;
}

.theme-toggle-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
    font-size: 16px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.theme-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.theme-toggle-btn i {
    transition: transform 0.3s ease;
}

.theme-toggle-btn:hover i {
    transform: rotate(180deg);
}

/* 下拉菜单样式 */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    color: white;
    text-decoration: none;
    font-size: 1.1em;
    transition: color 0.3s;
    cursor: pointer;
}

.menu-icon {
    display: flex;
    width: 18px;
    height: 18px;
    margin-left: 8px;
    fill: currentColor;
    transition: transform 0.3s;
}

.dropdown:hover .menu-icon {
    transform: rotate(90deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0; 
    width: 150px;
    background: var(--nav-bg-scroll);
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease-out;
    z-index: 101;
    transform-origin: top left;
    transform: scaleY(0.8);
}

/* 下拉菜单悬停效果 */
.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: scaleY(1);
}

.dropdown-item {
    display: flex;
    align-items: center;
    padding: 10px 15px;
    color: white;
    text-decoration: none;
    transition: all 0.3s;
    opacity: 0;
    transform: translateY(-5px);
}

.dropdown:hover .dropdown-item {
    opacity: 1;
    transform: translateY(0);
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--button-hover);
}

.dropdown-item svg {
    margin-left: 8px;
    width: 16px;
    height: 16px;
}

.item-icon {
    width: 16px;
    height: 16px;
    margin-left: 10px;
    fill: currentColor;
    transition: transform 0.3s;
}

.dropdown-item:hover .item-icon {
    transform: translateX(-3px);
}

/* 移动端样式已移至 navigation-mobile.css */