/* 重置与基础 */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* CSS变量 */
:root {
    --primary: #00d9ff;
    --secondary: #00ff9d;
    --dark-bg: #0a0e17;
    --card-bg: rgba(15, 22, 36, 0.85);
    --text-light: #ffffff;
    --text-gray: #a0b3d9;
    --border-color: rgba(0, 217, 255, 0.15);
    --gradient: linear-gradient(135deg, #00d9ff, #0066ff);
    --font-main: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.8rem;
    --spacing-md: 1.2rem;
    --spacing-lg: 1.8rem;
    --spacing-xl: 2.5rem;
    --border-radius: 10px;
}

body {
    font-family: var(--font-main);
    background: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(0, 102, 255, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 255, 157, 0.08) 0%, transparent 40%);
}

/* 粒子背景容器 */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* 通用容器 */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 通用卡片样式 */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.card:hover {
    border-color: rgba(0, 217, 255, 0.3);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 102, 255, 0.1);
}

/* 通用标题 */
.section-title {
    font-size: clamp(1.6rem, 4vw, 2rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--text-light);
    position: relative;
    display: block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 2px;
    background: var(--gradient);
    border-radius: 2px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.3rem;
    color: var(--text-light);
    text-decoration: none;
}

.logo span:nth-child(1) { color: var(--primary); }
.logo span:nth-child(3) { color: var(--secondary); }

/* 桌面导航 */
.desktop-nav {
    display: flex;
    gap: var(--spacing-lg);
}

@media (max-width: 768px) {
    .desktop-nav {
        display: none;
    }
}

.nav-link {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--text-light);
}

/* 移动菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 1.4rem;
    cursor: pointer;
    z-index: 1001;
    padding: 5px;
}

/* 移动菜单 */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(20px);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-xl) var(--spacing-md);
    transition: right 0.3s ease;
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.5);
    border-left: 1px solid var(--border-color);
}

.mobile-menu.active {
    right: 0;
}

/* 移动菜单关闭按钮 - 文字"关闭" */
.mobile-menu-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    color: #ffffff;
    font-size: 1.1rem;
    cursor: pointer;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    z-index: 10001;
    font-weight: 600;
    font-family: var(--font-main);
}

.mobile-menu-close:hover {
    color: var(--primary);
    transform: scale(1.1);
}

/* 友情链接部分 */
.friendship-links {
    margin-top: var(--spacing-md);
    text-align: center;
}

.friendship-title {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    text-align: center;
    width: 100%;
}

.friend-link {
    display: block;
    padding: var(--spacing-sm);
    color: var(--text-gray);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
    margin-bottom: var(--spacing-xs);
    text-align: left;
    border: 1px solid transparent;
}

.friend-link:hover {
    background: rgba(0, 217, 255, 0.1);
    color: var(--text-light);
    border-color: var(--border-color);
    transform: translateX(5px);
}

.friend-icon {
    margin-right: var(--spacing-sm);
    width: 20px;
    display: inline-block;
    text-align: center;
}

/* Hero区域 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 800px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.hero-subtitle {
    font-family: var(--font-mono);
    color: var(--secondary);
    font-size: clamp(0.8rem, 2vw, 0.95rem);
    letter-spacing: 3px;
    margin-bottom: var(--spacing-sm);
}

.domain-display {
    font-size: clamp(2rem, 7vw, 3rem);
    font-weight: 800;
    margin: var(--spacing-sm) 0 var(--spacing-md);
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}

.hero-tagline {
    font-size: clamp(0.95rem, 3vw, 1.05rem);
    color: var(--text-gray);
    max-width: 550px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.7;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    color: var(--primary);
    border: 2px solid transparent;
    border-image: var(--gradient);
    border-image-slice: 1;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
}

.cta-button:hover {
    background: rgba(0, 217, 255, 0.1);
    transform: translateY(-3px);
}

/* 域名含义 */
.domain-section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

/* 域名含义和成长轨迹之间的分割线 */
.domain-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 800px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.domain-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.domain-card {
    text-align: center;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    min-height: 280px;
}

.part-name {
    font-size: clamp(1.8rem, 5vw, 2.2rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-mono);
}

.part-name.it { 
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.part-name.boy { color: var(--text-light); }

.part-name.pw { 
    background: linear-gradient(135deg, #00ff9d, #00d9ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.part-desc {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.7;
    flex-grow: 1;
}

/* 时间轴 */
.timeline-section {
    padding: var(--spacing-xl) 0;
}

.timeline {
    max-width: 800px;
    margin: var(--spacing-lg) auto 0;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, 
        transparent,
        var(--primary),
        var(--secondary),
        var(--primary),
        transparent);
    transform: translateX(90px);
}

.timeline-item {
    display: flex;
    margin-bottom: var(--spacing-xl);
    position: relative;
    padding-left: 120px;
}

.timeline-year {
    position: absolute;
    left: 0;
    top: 0;
    min-width: 100px;
    text-align: center;
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--primary);
    background: var(--dark-bg);
    padding: 10px 15px;
    border-radius: 25px;
    border: 1px solid var(--primary);
    font-size: 1.1rem;
    z-index: 2;
    box-shadow: 0 0 0 10px var(--dark-bg);
}

.timeline-dot {
    position: absolute;
    left: 88px;
    top: 20px;
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    z-index: 3;
    box-shadow: 0 0 15px var(--primary);
}

.timeline-content {
    flex: 1;
}

.timeline-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.timeline-desc {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.7;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.timeline-tag {
    background: rgba(0, 102, 255, 0.1);
    color: var(--primary);
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    border: 1px solid rgba(0, 102, 255, 0.2);
}

/* 技术栈与项目 */
.tech-section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.tech-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 800px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.tech-card {
    text-align: center;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tech-icon {
    font-size: 2.2rem;
    color: var(--secondary);
    margin-bottom: var(--spacing-sm);
}

.tech-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.tech-desc {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.tech-skills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-sm) 0;
}

.tech-skill {
    background: rgba(0, 217, 255, 0.1);
    color: var(--primary);
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    flex: 1;
    min-width: calc(50% - var(--spacing-sm));
    text-align: center;
}

/* 将"响应式设计"改为"Responsive Web Design" - 专业术语 */
.tech-skill.special {
    min-width: calc(60% - var(--spacing-sm));
}

.project-showcase {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

.project-title {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
}

.project-item {
    background: rgba(0, 217, 255, 0.05);
    border-radius: 8px;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.project-item h4 {
    color: var(--text-light);
    margin-bottom: 5px;
    font-size: 1rem;
}

.project-item p {
    color: var(--text-gray);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
    line-height: 1.5;
}

.project-link {
    color: var(--secondary);
    text-decoration: none;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* 弹窗 - 修复：改为固定定位 */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(0, 0, 0, 0.92);
    border: 2px solid var(--primary);
    backdrop-filter: blur(12px);
    padding: 18px 24px;
    border-radius: 12px;
    box-shadow: 0 15px 40px rgba(0, 217, 255, 0.25);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    max-width: 300px;
    min-width: 240px;
    width: auto;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast-icon {
    color: #00ff9d;
    font-size: 1.8rem;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-content {
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-content h4 {
    color: #ffffff;
    margin: 0;
    font-size: 1.1rem;
    font-weight: 500;
    line-height: 1.4;
    white-space: nowrap;
}

/* 联系我 */
.connect-section {
    padding: var(--spacing-md) 0 var(--spacing-lg);
    text-align: center;
    position: relative;
}

.connect-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 800px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

/* 修复联系我标题与分割线间隙 */
.connect-section .section-title {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.connect-subtitle {
    color: var(--text-gray);
    font-size: 0.95rem;
    max-width: 550px;
    margin: 0 auto var(--spacing-md);
    line-height: 1.7;
}

.email-container {
    margin-bottom: var(--spacing-md);
}

/* 修复邮箱区域上下间隙 */
.email-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--gradient);
    color: var(--dark-bg);
    border: none;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: var(--spacing-xs);
}

.email-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 217, 255, 0.3);
}

.email-hint {
    color: var(--text-gray);
    font-size: 0.8rem;
    margin-top: var(--spacing-xs);
}

/* 页脚 */
.footer {
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-gray);
    font-size: 0.85rem;
    background: rgba(10, 14, 23, 0.7);
}

/* 删除域名显示后的样式调整 */
.footer-tagline {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-light);
    font-weight: 500;
}

.footer-copyright {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-top: var(--spacing-xs);
}

.footer-copyright a {
    color: var(--secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-copyright a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    /* 域名介绍 - 移动端优化 */
    .domain-cards {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .domain-card {
        padding: var(--spacing-md);
        min-height: auto;
    }
    
    /* 时间轴移动端优化 */
    .timeline::before {
        transform: translateX(70px);
    }
    
    .timeline-item {
        padding-left: 90px;
        margin-bottom: var(--spacing-lg);
    }
    
    .timeline-year {
        min-width: 80px;
        font-size: 1rem;
        padding: 8px 12px;
        box-shadow: 0 0 0 8px var(--dark-bg);
    }
    
    .timeline-dot {
        left: 68px;
        top: 18px;
    }
    
    /* Hero区域移动端优化 */
    .hero {
        padding-top: 80px;
        padding-bottom: var(--spacing-xl);
    }
    
    .navbar {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .section-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-md);
    }
    
    .section-title::after {
        width: 40px;
        bottom: -4px;
    }
    
    .part-name {
        font-size: 1.5rem;
    }
    
    /* 技术栈与项目移动端优化 */
    .tech-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .tech-skill {
        min-width: calc(50% - var(--spacing-sm));
        font-size: 0.8rem;
        padding: 0.3rem 0.7rem;
    }
    
    /* 移动端调整专业术语显示 */
    .tech-skill.special {
        min-width: calc(80% - var(--spacing-sm));
        font-size: 0.75rem;
        padding: 0.35rem 0.8rem;
    }
    
    /* 弹窗移动端优化 - 改为底部固定 */
    .toast {
        bottom: 20px;
        padding: 16px 20px;
        gap: 14px;
        max-width: 260px;
        min-width: 200px;
        width: 90%;
    }
    
    .toast-icon {
        font-size: 1.6rem;
    }
    
    .toast-content h4 {
        font-size: 1rem;
    }
    
    .email-button {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }
    
    /* 联系我区域移动端优化 */
    .connect-section {
        padding: var(--spacing-sm) 0 var(--spacing-md);
    }
    
    .connect-section .section-title {
        margin-top: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }
    
    .footer {
        padding: var(--spacing-sm) 0;
    }
    
    .footer-tagline {
        font-size: 1rem;
    }
    
    .friendship-title {
        font-size: 1.2rem;
    }
    
    /* 移动端关闭按钮优化 - 文字"关闭" */
    .mobile-menu-close {
        width: auto;
        height: auto;
        font-size: 1rem;
        padding: 8px 12px;
        right: 12px;
        top: 12px;
    }
    
    .footer-copyright {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .hero-tagline,
    .connect-subtitle {
        font-size: 0.9rem;
        padding: 0;
    }
    
    .domain-display {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.4rem;
    }
    
    .part-name {
        font-size: 1.4rem;
    }
    
    /* 弹窗超小屏幕优化 */
    .toast {
        bottom: 15px;
        padding: 14px 18px;
        gap: 12px;
        max-width: 220px;
        min-width: 180px;
    }
    
    .toast-icon {
        font-size: 1.4rem;
    }
    
    .toast-content h4 {
        font-size: 0.95rem;
    }
    
    .email-button {
        padding: 0.8rem var(--spacing-md);
        font-size: 0.85rem;
    }
    
    /* 时间轴超小屏幕优化 */
    .timeline-item {
        padding-left: 85px;
    }
    
    .timeline-year {
        min-width: 75px;
        font-size: 0.95rem;
        padding: 7px 10px;
        box-shadow: 0 0 0 6px var(--dark-bg);
    }
    
    .timeline-dot {
        left: 65px;
        top: 16px;
    }
    
    /* 技术栈超小屏幕优化 */
    .tech-skill {
        min-width: calc(100% - var(--spacing-sm));
        font-size: 0.75rem;
        padding: 0.25rem 0.6rem;
    }
    
    /* 超小屏幕专业术语优化 */
    .tech-skill.special {
        min-width: calc(90% - var(--spacing-sm));
        font-size: 0.7rem;
        padding: 0.3rem 0.6rem;
    }
    
    /* 联系我区域超小屏幕优化 */
    .connect-section {
        padding: var(--spacing-sm) 0;
    }
    
    .footer-tagline {
        font-size: 0.95rem;
    }
    
    /* 超小屏幕关闭按钮优化 - 文字"关闭" */
    .mobile-menu-close {
        font-size: 0.9rem;
        padding: 6px 10px;
        top: 10px;
        right: 10px;
    }
    
    .footer-copyright {
        font-size: 0.85rem;
    }
}

@media (max-width: 360px) {
    .domain-cards,
    .tech-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-skill {
        min-width: 100%;
    }
    
    /* 小屏幕专业术语完全占据 */
    .tech-skill.special {
        min-width: 100%;
    }
    
    /* 超小屏幕弹窗优化 */
    .toast {
        max-width: 200px;
        min-width: 160px;
        padding: 12px 16px;
        gap: 10px;
        bottom: 12px;
    }
    
    .toast-icon {
        font-size: 1.3rem;
    }
    
    .toast-content h4 {
        font-size: 0.9rem;
    }
    
    .footer-tagline {
        font-size: 0.9rem;
    }
    
    .footer-copyright {
        font-size: 0.8rem;
    }
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.5s ease forwards;
}

/* 防止FOUC */
.js-loading * {
    transition: none !important;
}