/* 基础样式和布局 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    scrollbar-gutter: stable;
}

/* 隐藏滚动条 */
::-webkit-scrollbar {
    display: none;
}
* {
    scrollbar-width: none;
}

/* 全局噪点纹理 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    z-index: 9999;
}

/* 全局背景渐变 */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    background:
        radial-gradient(ellipse 80% 60% at 50% -10%, rgba(88, 166, 255, 0.25) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(124, 58, 237, 0.18) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 10% 90%, rgba(88, 166, 255, 0.15) 0%, transparent 50%);
}

html {
    scroll-behavior: smooth;
}

a {
    text-decoration: none;
    color: inherit;
}

/* 顶部导航 */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 0 2rem;
}

.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    padding: 0 2rem;
    height: 64px;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo i {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 0.5rem;
    margin-left: 2rem;
}

.nav-link {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
    cursor: pointer;
}

.nav-link:hover,
.nav-link.active {
    background: var(--bg-hover);
    color: var(--text-primary);
}

/* 导航栏右侧区域 */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

/* nav 搜索按钮 */
.nav-search-btn {
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.nav-search-btn:hover {
    color: var(--accent);
}

.nav-search-btn i {
    font-size: 1rem;
}

/* nav 搜索框容器 */
.nav-search-wrap {
    display: flex;
    align-items: center;
    position: relative;
}

/* nav 搜索输入框 - 默认折叠 */
.nav-search-input {
    width: 0;
    max-width: 0;
    padding: 0;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: all 0.3s ease;
    opacity: 0;
}

/* 展开态 */
.nav-search-wrap.active .nav-search-input {
    width: 180px;
    max-width: 180px;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-card);
    opacity: 1;
}

/* 主题切换按钮 */
.theme-toggle {
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.theme-toggle:hover {
    color: var(--accent);
}

.theme-toggle i {
    font-size: 1rem;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root.light .theme-toggle .icon-sun { display: block; }
:root.light .theme-toggle .icon-moon { display: none; }

/* 主内容区 */
main {
    padding-top: 64px;
    flex: 1;
}

/* 页面切换 */
.page {
    display: none;
    background: transparent;
}

.page.active {
    display: block;
}

/* 底部 */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 0.75rem 2rem;
    text-align: center;
    margin-top: auto;
}
.footer-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-link {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-link:hover {
    color: var(--accent);
}

/* 统计按钮 */
.stats-btn {
    width: 40px;
    height: 40px;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stats-btn i {
    font-size: 1rem;
}

.stats-btn:hover {
    color: var(--accent);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    gap: 0;
}

.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.hamburger:hover {
    color: var(--accent);
}

.hamburger.active {
    color: var(--accent);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}
/* 确保logo图片尺寸 */
.nav-logo-img {
    height: 32px !important;
    width: auto !important;
}

/* Logo SVG theme适配 */
.nav-logo-img polygon { stroke: var(--accent); }
.nav-logo-img .cn-1 { fill: var(--accent); }
.nav-logo-img .cn-2, .nav-logo-img .cn-4 { fill: var(--accent); }
.nav-logo-img .cn-3, .nav-logo-img .cn-5, .nav-logo-img .cn-6, .nav-logo-img .cn-7 { fill: var(--accent-secondary); }
.nav-logo-img .ln-1, .nav-logo-img .ln-3 { stroke: var(--accent); }
.nav-logo-img .ln-2, .nav-logo-img .ln-4, .nav-logo-img .ln-5, .nav-logo-img .ln-6 { stroke: var(--accent-secondary); }
.nav-logo-img .logo-text-main { fill: var(--text-primary); }
.nav-logo-img .logo-text-sub { fill: var(--text-secondary); }
}