::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}


::-webkit-scrollbar-track {
    background: transparent;
}


::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 10px;
    border: 2px solid transparent; 
    background-clip: content-box;
    transition: background-color 0.3s;
}


::-webkit-scrollbar-thumb:hover {
    background-color: rgba(0, 0, 0, 0.4);
}


[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 255, 255, 0.4);
}


:root {
    /* --- 明亮模式 --- */
    --bg-color: #ffffff;              
    --text-color: #000000;            
    --secondary-text: #737373;     
    --border-color: #dbdbdb;          
    

    --card-bg: #ffffff;
    --card-border: 1px solid transparent; 
    --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.08); 
    
    --accent-color: #000000;         
    --accent-text: #ffffff;           
    
    /* 磨砂玻璃 */
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: 1px solid rgba(255, 255, 255, 0.8);
    --glass-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    
    /* 交互反馈 */
    --hover-bg: rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

[data-theme="dark"] {
    /* --- 暗黑模式 --- */
    --bg-color: #000000;             
    --text-color: #e7e9ea;           
    --secondary-text: #71767b;        
    --border-color: #2f3336;         
    

    --card-bg: #000000;
    --card-border: 1px solid #2f3336;
    --card-shadow: none;              
    

    --accent-color: #ffffff;          
    --accent-text: #000000;           
    
    /* 磨砂玻璃 */
    --glass-bg: rgba(22, 24, 28, 0.8);
    --glass-border: 1px solid rgba(255, 255, 255, 0.15);
    --glass-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    
    /* 交互反馈 */
    --hover-bg: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
}

.hero-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

body:not(.home-page) .hero-bg {
    display: none;
}

.aurora {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.1; 
    pointer-events: none;
    filter: blur(60px);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 30px 40px; 
    
    display: flex;
    justify-content: space-between;
    align-items: center;
    
    background: transparent;
    border: none;

    pointer-events: none;
    transition: padding 0.3s ease;
}

.logo, nav, .controls {
    pointer-events: auto;
}

/* Logo 区域 */
.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 40px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

/* 导航菜单 */
nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 6px;
    padding: 6px;
    
    /* 磨砂玻璃 */
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: var(--glass-border);
    border-radius: 99px;
    box-shadow: var(--glass-shadow);
}

nav a {
    display: block;
    padding: 8px 20px;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 600;
    font-size: 14px;
    border-radius: 99px;
    transition: var(--transition);
    opacity: 0.7;
    white-space: nowrap; 
}

nav a:hover {
    background: var(--hover-bg);
    opacity: 1;
}

nav a.active {
    background: var(--accent-color);
    color: var(--accent-text);
    opacity: 1;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* 控制区 */
.controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* 按钮样式 */
.theme-toggle, .current-lang {
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: var(--glass-border);
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    position: relative;
    color: var(--text-color);
}

.theme-toggle:hover, .lang-selector:hover .current-lang {
    background: var(--hover-bg);
    transform: translateY(-2px);
}

.theme-toggle .icon {
    position: absolute;
    transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55), opacity 0.3s;
}

.theme-toggle .sun-icon { opacity: 1; transform: rotate(0deg); }
.theme-toggle .moon-icon { opacity: 0; transform: rotate(90deg); }

[data-theme="dark"] .theme-toggle .sun-icon { opacity: 0; transform: rotate(-90deg); }
[data-theme="dark"] .theme-toggle .moon-icon { opacity: 1; transform: rotate(0deg); }

.lang-selector { position: relative; }

.current-lang {
    padding: 0 16px;
    height: 40px;
    border-radius: 20px;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 6px;
    min-width: 140px;
    box-shadow: var(--card-shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    z-index: 1001;
    pointer-events: auto;
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 14px;
    color: var(--text-color);
}

.lang-option:hover {
    background: var(--hover-bg);
}

.flag {
    width: 20px;
    height: 14px;
    border-radius: 2px;
    background-size: cover;
    background-position: center;
    box-shadow: 0 0 2px rgba(0,0,0,0.2);
}
.flag.china { background-image: url('https://flagcdn.com/cn.svg'); }
.flag.usa { background-image: url('https://flagcdn.com/us.svg'); }
.flag.japan { background-image: url('https://flagcdn.com/jp.svg'); }

main {
    flex: 1;
    padding-top: 140px; 
    padding-bottom: 40px;
}

.page-title {
    text-align: center;
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 50px;
    letter-spacing: -0.03em;
    color: var(--text-color);
    position: relative;
    display: table;
    margin-left: auto;
    margin-right: auto;
}

.page-title::after {
    content: '';
    display: block;
    width: 40%;
    height: 4px;
    background: var(--accent-color);
    margin: 12px auto 0;
    border-radius: 2px;
    opacity: 0.8;
}

.projects-section {
    width: 100%;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--card-bg);
    border: var(--card-border);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px rgba(0,0,0,0.12); 
    border-color: var(--secondary-text);
}

[data-theme="dark"] .project-card:hover {
    box-shadow: none;
    border-color: var(--text-color);
}

.project-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
    background: var(--hover-bg);
    border-bottom: 1px solid var(--border-color);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-image img {
    transform: scale(1.03);
}

.project-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-color);
    letter-spacing: -0.01em;
}

.project-desc {
    font-size: 14px;
    color: var(--secondary-text);
    margin-bottom: 20px;
    flex: 1;
    line-height: 1.5;
}

.project-links {
    display: flex;
    gap: 10px;
    align-items: center;
}

.project-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
    background: var(--accent-color);
    color: var(--accent-text);
    border: 1px solid var(--accent-color);
}

.project-link:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

.github-link {
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.github-link:hover {
    background: var(--hover-bg);
    border-color: var(--text-color);
}

.password {
    font-size: 12px;
    color: var(--secondary-text);
    font-family: monospace;
    background: var(--hover-bg);
    padding: 4px 8px;
    border-radius: 4px;
}

.hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero h1 {
    font-size: 80px;
    font-weight: 900;
    margin-bottom: 30px;
    letter-spacing: -0.05em;
    color: var(--text-color);
    background: none;
    -webkit-text-fill-color: initial;
    text-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.hero-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.info-item {
    padding: 12px 24px;
    background: var(--glass-bg);
    border: var(--glass-border);
    border-radius: 99px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-color);
    backdrop-filter: blur(10px);
    box-shadow: var(--glass-shadow);
}

.tag-group {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.tag {
    font-size: 14px;
    color: var(--secondary-text);
    font-weight: 500;
    background: var(--glass-bg);
    padding: 4px 12px;
    border-radius: 20px;
    backdrop-filter: blur(5px);
}

.tag::before {
    content: '#';
    color: var(--accent-color);
    margin-right: 2px;
}

.hero-motto {
    margin-top: 40px;
    padding: 20px;
    background: var(--glass-bg);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    display: inline-block;
}

.hero-motto span {
    font-size: 18px;
    font-style: italic;
    color: var(--text-color);
    font-family: "Georgia", serif;
}

footer {
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    background: var(--bg-color);
}

.footer-emails {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.footer-emails span {
    color: var(--text-color);
    font-weight: 500;
    font-size: 14px;
}

.footer-separator {
    width: 4px;
    height: 4px;
    background: var(--border-color);
    border-radius: 50%;
}

.footer-content p {
    color: var(--secondary-text);
    font-size: 12px;
}

@media (max-width: 1200px) {
    .project-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
    .project-grid { grid-template-columns: repeat(2, 1fr); }
    
    header { padding: 20px; }
    
    nav ul { gap: 2px; }
    nav a { padding: 6px 12px; font-size: 13px; }
    
    .page-title { font-size: 32px; }
    .hero h1 { font-size: 56px; }
}

@media (max-width: 600px) {
    .project-grid { grid-template-columns: 1fr; }
    
    header {
        flex-direction: column;
        gap: 12px; 
        padding: 15px;
        pointer-events: none;
        align-items: center; 
    }
    
    .logo {
        margin-bottom: 4px;
    }
    
    nav {
        width: 100%;
        pointer-events: auto;
        display: flex;
        justify-content: center;
    }
    
    nav ul {
        width: 100%;
        max-width: 340px; 
        flex-wrap: wrap;  
        justify-content: center; 
        gap: 8px; 
        padding: 12px; 
        border-radius: 24px; 
    }
    
    nav a {
        flex: 0 0 auto; 
        padding: 6px 12px;
        font-size: 13px;
    }
    
    .controls {
        width: 100%;
        justify-content: center; 
        pointer-events: auto;
        margin-top: 4px;
    }
    
    .lang-dropdown {
        right: 50%;
        transform: translateX(50%) translateY(-10px); 
        top: calc(100% + 8px);
    }
    
    .lang-dropdown.show {
        transform: translateX(50%) translateY(0);
    }
    
    .hero h1 { 
        font-size: 42px;
        line-height: 1.2;
        padding: 0 10px;
    }
    
    .hero-info { 
        flex-direction: column; 
        align-items: center; 
        gap: 10px;
    }
    
    .info-item {
        width: 100%;
        max-width: 200px;
    }
    
    main {
        padding-top: 240px; 
    }
}


/* =================================================================
   首页专属样式
   ================================================================= */

body.home-page {
    background-color: transparent !important;
}

body.home-page .hero h1,
body.home-page .page-title,
body.home-page .hero-motto span {
    color: #ffffff !important;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

body.home-page .info-item,
body.home-page .tag {
    color: #ffffff;
    border-color: rgba(255,255,255,0.3);
    background: rgba(255,255,255,0.1);
}
body.home-page .tag {
    color: rgba(255,255,255,0.8);
}

body.home-page footer {
    background-color: transparent !important;
    border-top: none; 
}
body.home-page .footer-emails span,
body.home-page .footer-content p {
    color: rgba(255, 255, 255, 0.7) !important;
}

body.home-page nav ul,
body.home-page .theme-toggle,
body.home-page .current-lang,
body.home-page .hero-motto {

    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    color: #ffffff !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3) !important;
}


body.home-page nav ul:hover,
body.home-page .theme-toggle:hover,
body.home-page .lang-selector:hover .current-lang,
body.home-page .hero-motto:hover {
    background: rgba(255, 255, 255, 0.15) !important;
    border-color: rgba(255, 255, 255, 0.4) !important;
}

body.home-page nav a {
    color: rgba(255, 255, 255, 0.8) !important;
}
body.home-page nav a:hover {
    background: rgba(255, 255, 255, 0.2) !important;
    color: #ffffff !important;
}
body.home-page nav a.active {
    background: #ffffff !important; 
    color: #000000 !important;     
    font-weight: bold;
}

body.home-page .theme-toggle svg {
    stroke: #ffffff !important;
}