/* ===== 基础重置与变量定义 ===== */
:root {
    /* 配色方案 - 浅色科技感 */
    --color-bg: #F8FAFC;
    --color-card: #FFFFFF;
    --color-primary: #3B82F6;
    --color-secondary: #6366F1;
    --color-accent: #10B981;
    --color-text: #1E293B;
    --color-text-light: #64748B;
    --color-text-dark: #0F172A;
    --color-border: rgba(59, 130, 246, 0.2);
    --color-hover: rgba(59, 130, 246, 0.05);
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px rgba(59, 130, 246, 0.15);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.2);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* 间距 */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
}

/* 夜间模式配色方案 */
body.dark {
    /* 深色科技感配色 */
    --color-bg: #0F172A;
    --color-card: #1E293B;
    --color-primary: #3B82F6;
    --color-secondary: #8B5CF6;
    --color-accent: #10B981;
    --color-text: #F1F5F9;
    --color-text-light: #94A3B8;
    --color-text-dark: #FFFFFF;
    --color-border: rgba(59, 130, 246, 0.3);
    --color-hover: rgba(59, 130, 246, 0.15);
    
    /* 深色阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
}

/* 平滑的主题切换动画 */
body {
    transition: all 0.3s ease;
}

body * {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding: var(--space-xl) 0;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--color-text-dark);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
    max-width: 600px;
}

.modify-note {
    margin-top: var(--space-lg);
    padding: var(--space-md);
    background-color: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.modify-note i {
    color: var(--color-primary);
    margin-right: var(--space-xs);
}

/* ===== 导航栏样式 ===== */
.navbar {
    background-color: var(--color-card);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

/* 夜间模式切换按钮 */
.theme-toggle {
    background-color: var(--color-primary);
    border: none;
    color: white;
    font-size: 1.3rem;
    cursor: pointer;
    padding: 0.8rem 1rem;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    margin-left: 0.8rem;
    box-shadow: var(--shadow-md);
    min-width: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    filter: brightness(1.1);
}

/* 主题切换动画效果 */
.theme-toggle i {
    transition: transform 0.3s ease, color 0.3s ease;
    z-index: 2;
    position: relative;
}

body.dark .theme-toggle {
    background-color: var(--color-secondary);
}

body.dark .theme-toggle i {
    transform: rotate(360deg);
}

/* 移动端主题切换按钮样式 */
.nav-mobile .theme-toggle {
    width: 100%;
    justify-content: flex-start;
    gap: var(--space-sm);
    margin-left: 0;
    padding: var(--space-sm);
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    max-width: 1400px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--color-text-dark);
    font-weight: 600;
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.nav-brand:hover {
    color: var(--color-primary);
}

.nav-icon {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 1.2rem; /* 减少间距，让布局更合理 */
    align-items: center;
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem; /* 稍微减小字体 */
    transition: all 0.3s ease;
    padding: 0.6rem 0.8rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-hover);
}

.nav-external {
    position: relative;
}

.nav-external::after {
    content: "↗";
    font-size: 0.7rem;
    margin-left: 4px;
    opacity: 0.7;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--space-xs);
}
/* 移动端下拉菜单 */
.nav-mobile {
    display: none;
    flex-direction: column;
    padding: var(--space-md);
    background-color: var(--color-card);
    border-top: 1px solid var(--color-border);
}

.nav-mobile-link {
    color: var(--color-text);
    text-decoration: none;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav-mobile-link:hover {
    color: var(--color-primary);
    background-color: var(--color-hover);
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
    background: linear-gradient(135deg, var(--color-card) 0%, var(--color-bg) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
    top: 20%;
    left: 10%;
    animation: float 6s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    bottom: 20%;
    right: 10%;
    animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: var(--space-xl);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--space-md);
    background: linear-gradient(90deg, #3B82F6, #8B5CF6);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-xl);
}

.hero-scroll {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-text-light);
    animation: bounce 2s infinite;
    cursor: pointer;
    transition: color 0.3s ease;
}

.hero-scroll:hover {
    color: var(--color-primary);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* ===== 我的作品区域 ===== */
.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.work-card {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    height: 250px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.work-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 30%, rgba(59, 130, 246, 0.1) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.work-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-glow);
    border-color: var(--color-primary);
}

.work-card:hover::before {
    opacity: 1;
}

.work-card:hover .work-icon {
    transform: rotate(360deg) scale(1.1);
    color: var(--color-primary);
}

.work-icon {
    font-size: 2.5rem;
    color: var(--color-secondary);
    margin-bottom: var(--space-md);
    transition: all 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.work-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-text-dark);
    margin-bottom: var(--space-xs);
    position: relative;
    z-index: 2;
}

.work-desc {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.5;
    position: relative;
    z-index: 2;
    margin-bottom: 1.5rem; /* 增加底部间距，避免与hover文字重叠 */
}

.work-hover {
    position: absolute;
    bottom: var(--space-lg);
    left: var(--space-lg);
    right: var(--space-lg);
    color: var(--color-primary);
    font-weight: 500;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    text-align: right;
    z-index: 2;
}

.work-card:hover .work-hover {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 常用工具区域 ===== */
.tools-section {
    background: linear-gradient(to bottom, transparent, var(--color-bg));
}

.tools-container {
    margin-top: var(--space-xl);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-top: var(--space-md);
    margin-bottom: var(--space-lg);
}

.tool-card {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    display: block;
    height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.tool-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.tool-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-md);
}

.tool-icon {
    font-size: 2rem;
    color: var(--color-primary);
}

.tool-badge {
    background-color: var(--color-accent);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 20px;
}

.tool-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-text-dark);
    margin-bottom: var(--space-xs);
}

.tool-desc {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
}

.tool-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tool-tag {
    background-color: rgba(59, 130, 246, 0.2);
    color: var(--color-primary);
    font-size: 0.8rem;
    padding: 4px 10px;
    border-radius: 20px;
}

.tool-arrow {
    color: var(--color-primary);
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.tool-card:hover .tool-arrow {
    transform: translateX(5px);
}

/* ===== 底部栏 ===== */
.footer {
    background-color: var(--color-card);
    border-top: 1px solid var(--color-border);
    padding: var(--space-md) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-right {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--space-md);
}

.old-version-btn {
    display: inline-block;
    position: relative;
    font-size: 0.8rem;
    color: var(--color-text-light);
    text-decoration: none;
    padding: 0.3rem 0.8rem;
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 0.3rem;
    transition: all 0.3s ease;
}

.old-version-btn:hover {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.tooltip {
    position: absolute;
    bottom: 100%;
    right: 0;
    background-color: var(--color-primary);
    color: white;
    padding: 0.3rem 0.6rem;
    border-radius: 0.3rem;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    margin-bottom: 0.5rem;
}

.tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    right: 0.5rem;
    border-width: 0.3rem;
    border-style: solid;
    border-color: var(--color-primary) transparent transparent transparent;
}

.old-version-btn:hover .tooltip {
    opacity: 1;
    visibility: visible;
}

.footer-time {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text);
}

.footer-time i {
    color: var(--color-primary);
    font-size: 1.1rem;
}

.footer-info {
    text-align: left;
    color: var(--color-text-light);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.footer-info p {
    margin: 0;
}

.footer-icon {
    font-size: 1.5rem;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }
    
    .works-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tools-container {
        grid-template-columns: 250px 1fr;
    }
    
    .nav-menu {
        gap: 1rem;
    }
    
    .nav-link {
        font-size: 0.9rem;
        padding: 0.5rem 0.7rem;
    }
}

@media (max-width: 900px) {
    .nav-menu {
        gap: 0.8rem;
    }
    
    .nav-link {
        font-size: 0.85rem;
        padding: 0.4rem 0.6rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .nav-mobile.active {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .works-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .work-card {
        height: 220px;
    }
    
    .tools-container {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-lg);
    }
    
    .footer-info {
        text-align: center;
        align-items: center;
    }
    
    .footer-time, .footer-info {
        padding: 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section {
        padding: var(--space-lg) 0;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .work-card {
        padding: var(--space-md);
        height: 200px;
    }
}