/* ========================================
   个人智慧之家 - 样式表
   ======================================== */

/* CSS变量定义 */
:root {
    /* 主色调 */
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-dark: linear-gradient(135deg, #0c0d10 0%, #1a1b2e 100%);
    --gradient-hero: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #0d0d15 100%);
    
    /* 背景色 */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    
    /* 文字颜色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* 边框和装饰 */
    --border-color: rgba(255, 255, 255, 0.1);
    --glow-color: rgba(99, 102, 241, 0.5);
    
    /* 间距 */
    --section-padding: 100px 0;
    --container-width: 1200px;
    
    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 容器 */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    padding: 15px 0;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 2rem;
    filter: drop-shadow(0 0 10px var(--glow-color));
}

.nav-menu {
    display: flex;
    gap: 35px;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: var(--transition-fast);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

.nav-link:hover::after {
    width: 100%;
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ========================================
   首页横幅
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.particles {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(244, 114, 182, 0.1) 0%, transparent 40%);
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    max-width: var(--container-width);
    padding: 0 20px;
    z-index: 10;
}

.hero-text {
    flex: 1;
}

.greeting {
    display: block;
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.title-main {
    display: block;
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(135deg, #fff 0%, #a5b4fc 50%, #818cf8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
}

.tag {
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.tag:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-light);
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-light);
    background: var(--bg-card);
}

/* AI大脑视觉效果 */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ai-brain {
    position: relative;
    width: 350px;
    height: 350px;
}

.brain-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow: 
        0 0 60px rgba(99, 102, 241, 0.6),
        0 0 100px rgba(99, 102, 241, 0.4),
        inset 0 0 30px rgba(255, 255, 255, 0.2);
    animation: pulse 2s ease-in-out infinite;
}

.brain-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    border: 2px solid rgba(99, 102, 241, 0.3);
}

.ring-1 {
    width: 180px;
    height: 180px;
    animation: rotate 8s linear infinite;
}

.ring-2 {
    width: 260px;
    height: 260px;
    animation: rotate 12s linear infinite reverse;
}

.ring-3 {
    width: 340px;
    height: 340px;
    animation: rotate 16s linear infinite;
}

.neural-nodes .node {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--primary-light);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--glow-color);
}

.node-1 { top: 10%; left: 50%; animation: float 3s ease-in-out infinite; }
.node-2 { top: 30%; left: 85%; animation: float 3.5s ease-in-out infinite 0.5s; }
.node-3 { top: 70%; left: 90%; animation: float 4s ease-in-out infinite 1s; }
.node-4 { top: 90%; left: 50%; animation: float 3.2s ease-in-out infinite 0.3s; }
.node-5 { top: 70%; left: 10%; animation: float 3.8s ease-in-out infinite 0.8s; }
.node-6 { top: 30%; left: 15%; animation: float 3.3s ease-in-out infinite 0.2s; }

/* 滚动提示 */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    margin: 10px auto 0;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: scroll 1.5s ease-in-out infinite;
}

/* ========================================
   通用区块样式
   ======================================== */
section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* ========================================
   关于我
   ======================================== */
.about {
    background: var(--bg-secondary);
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 50px;
}

.about-card {
    display: flex;
    gap: 40px;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    align-items: center;
}

.about-avatar {
    position: relative;
    flex-shrink: 0;
}

.avatar-ring {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: var(--gradient-primary);
    padding: 4px;
}

.avatar-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 5rem;
}

.about-info h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--primary-light);
}

.about-intro {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 30px;
}

.about-stats {
    display: flex;
    gap: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.philosophy-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.philosophy-card {
    padding: 30px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    text-align: center;
    transition: var(--transition-normal);
    opacity: 0;
    transform: translateY(20px);
}

.philosophy-card.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.philosophy-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-light);
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.philosophy-card h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-light);
}

.philosophy-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========================================
   技术专长
   ======================================== */
.skills {
    background: var(--bg-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.skill-category {
    padding: 30px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition-slow);
}

.skill-category.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 25px;
}

.category-icon {
    font-size: 1.8rem;
}

.category-header h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.skill-name {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.skill-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 10px;
    transition: width 1s ease;
}

/* ========================================
   项目展示
   ======================================== */
.projects {
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.project-card {
    padding: 30px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    transition: var(--transition-normal);
    opacity: 0;
    transform: translateY(20px);
}

.project-card.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.project-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-light);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.project-content h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--primary-light);
}

.project-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.project-tech span {
    padding: 4px 12px;
    background: rgba(99, 102, 241, 0.15);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--primary-light);
}

.project-status {
    margin-top: auto;
}

.status-badge {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.status-badge.completed {
    background: rgba(34, 197, 94, 0.15);
    color: #22c55e;
}

.status-badge.in-progress {
    background: rgba(234, 179, 8, 0.15);
    color: #eab308;
}

.status-badge.planning {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
}

/* ========================================
   学习资源
   ======================================== */
.resources {
    background: var(--bg-primary);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-bottom: 60px;
}

.resource-card {
    padding: 30px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: var(--transition-normal);
    opacity: 0;
    transform: translateY(20px);
}

.resource-card.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.resource-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-light);
}

.resource-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.resource-card h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--primary-light);
}

.resource-list {
    list-style: none;
}

.resource-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.resource-list li:last-child {
    border-bottom: none;
}

/* 学习路径 */
.learning-path {
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
}

.learning-path h3 {
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-align: center;
}

.path-timeline {
    display: flex;
    flex-direction: column;
    gap: 30px;
    position: relative;
    padding-left: 30px;
}

.path-timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gradient-primary);
}

.path-item {
    position: relative;
}

.path-dot {
    position: absolute;
    left: -30px;
    top: 5px;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--glow-color);
}

.path-content h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--primary-light);
}

.path-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ========================================
   联系我
   ======================================== */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.contact-item {
    display: flex;
    gap: 15px;
    padding: 25px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: var(--transition-normal);
}

.contact-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary-light);
}

.contact-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1rem;
    margin-bottom: 5px;
    color: var(--primary-light);
}

.contact-details p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.message-card {
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.message-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.message-card p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 30px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.social-link {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    font-size: 1.5rem;
    text-decoration: none;
    transition: var(--transition-normal);
}

.social-link:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--bg-primary);
    padding: 60px 0 40px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    text-align: center;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.footer-quote {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: 20px;
}

.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ========================================
   动画关键帧
   ======================================== */
@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.05); }
}

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes scroll {
    0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
    50% { opacity: 0.5; transform: translateX(-50%) translateY(10px); }
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .resources-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        transform: translateX(-100%);
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
        padding-top: 100px;
    }
    
    .title-main {
        font-size: 2.5rem;
    }
    
    .hero-tags {
        justify-content: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-visual {
        margin-top: 40px;
    }
    
    .ai-brain {
        width: 250px;
        height: 250px;
    }
    
    .brain-core {
        width: 70px;
        height: 70px;
    }
    
    .ring-1 { width: 130px; height: 130px; }
    .ring-2 { width: 185px; height: 185px; }
    .ring-3 { width: 240px; height: 240px; }
    
    .about-card {
        flex-direction: column;
        text-align: center;
    }
    
    .about-stats {
        justify-content: center;
    }
    
    .philosophy-cards {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .resources-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .title-main {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }
    
    .about-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}