/* 
* 样式表: styles.css
* 描述: 科技感个人网页样式
* 作者: TechDev
* 版本: 1.0
*/

/* ===== CSS变量定义 ===== */
:root {
   /* 主要颜色 */
   --primary-color: #00ff88;
   --secondary-color: #0066ff;
   --accent-color: #ff6b6b;
   
   /* 背景颜色 */
   --bg-primary: #0a0a0a;
   --bg-secondary: #1a1a2e;
   --bg-tertiary: #16213e;
   
   /* 文本颜色 */
   --text-primary: #ffffff;
   --text-secondary: #b0b0b0;
   --text-muted: #666666;
   
   /* 字体 */
   --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
   --font-mono: 'Courier New', monospace;
   
   /* 间距 */
   --spacing-xs: 0.5rem;
   --spacing-sm: 1rem;
   --spacing-md: 2rem;
   --spacing-lg: 3rem;
   --spacing-xl: 4rem;
   
   /* 边框圆角 */
   --border-radius: 8px;
   --border-radius-lg: 16px;
   
   /* 阴影 */
   --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.1);
   --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.2);
   --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.3);
   
   /* 过渡动画 */
   --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;
   font-size: 16px;
}

body {
   font-family: var(--font-primary);
   background-color: var(--bg-primary);
   color: var(--text-primary);
   line-height: 1.6;
   overflow-x: hidden;
}

/* ===== 页面加载动画 ===== */
.loader {
   position: fixed;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   background: var(--bg-primary);
   display: flex;
   flex-direction: column;
   justify-content: center;
   align-items: center;
   z-index: 9999;
   transition: opacity var(--transition-slow);
}

.loader.hidden {
   opacity: 0;
   pointer-events: none;
}

.loader-circle {
   width: 60px;
   height: 60px;
   border: 3px solid var(--bg-secondary);
   border-top: 3px solid var(--primary-color);
   border-radius: 50%;
   animation: spin 1s linear infinite;
}

.loader-text {
   margin-top: var(--spacing-sm);
   color: var(--text-secondary);
   font-family: var(--font-mono);
}

@keyframes spin {
   0% { transform: rotate(0deg); }
   100% { transform: rotate(360deg); }
}

/* ===== 导航栏样式 ===== */
.navbar {
   position: fixed;
   top: 0;
   left: 0;
   width: 100%;
   background: rgba(26, 26, 46, 0.95);
   backdrop-filter: blur(10px);
   z-index: 1000;
   transition: all var(--transition-normal);
}

.navbar.scrolled {
   background: rgba(26, 26, 46, 0.98);
   box-shadow: var(--shadow-md);
}

.nav-container {
   max-width: 1200px;
   margin: 0 auto;
   padding: 0 var(--spacing-sm);
   display: flex;
   justify-content: space-between;
   align-items: center;
   height: 70px;
}

/* LOGO样式 */
.nav-logo {
   display: flex;
   align-items: center;
   gap: var(--spacing-xs);
}

.logo-img {
   width: 40px;
   height: 40px;
   border-radius: var(--border-radius);
   transition: transform var(--transition-normal);
}

.logo-img:hover {
   transform: scale(1.1);
}

.logo-text {
   font-size: 1.5rem;
   font-weight: bold;
   color: var(--primary-color);
   font-family: var(--font-mono);
}

/* 导航菜单样式 */
.nav-menu {
   display: flex;
   list-style: none;
   gap: var(--spacing-md);
}

.nav-link {
   color: var(--text-primary);
   text-decoration: none;
   font-weight: 500;
   position: relative;
   transition: color var(--transition-normal);
}

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

.nav-link::after {
   content: '';
   position: absolute;
   bottom: -5px;
   left: 0;
   width: 0;
   height: 2px;
   background: var(--primary-color);
   transition: width var(--transition-normal);
}

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

/* 移动端菜单按钮 */
.hamburger {
   display: none;
   flex-direction: column;
   cursor: pointer;
   gap: 4px;
}

.bar {
   width: 25px;
   height: 3px;
   background: var(--text-primary);
   transition: all var(--transition-normal);
}

.hamburger.active .bar:nth-child(1) {
   transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .bar:nth-child(2) {
   opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
   transform: rotate(-45deg) translate(7px, -6px);
}

/* ===== 通用容器样式 ===== */
.container {
   max-width: 1200px;
   margin: 0 auto;
   padding: 0 var(--spacing-sm);
}

/* ===== 按钮样式 ===== */
.btn {
   display: inline-block;
   padding: 12px 24px;
   border: none;
   border-radius: var(--border-radius);
   text-decoration: none;
   font-weight: 600;
   text-align: center;
   cursor: pointer;
   transition: all var(--transition-normal);
   position: relative;
   overflow: hidden;
}

.btn-primary {
   background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
   color: var(--bg-primary);
}

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

.btn-small {
   padding: 8px 16px;
   font-size: 0.9rem;
}

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

.btn-full {
   width: 100%;
}

.btn:hover {
   transform: translateY(-2px);
   box-shadow: var(--shadow-md);
}

.btn-primary:hover {
   background: linear-gradient(45deg, var(--secondary-color), var(--primary-color));
}

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

.btn-outline:hover {
   background: var(--text-primary);
   color: var(--bg-primary);
}

/* ===== 英雄区域样式 ===== */
.hero {
   height: 100vh;
   position: relative;
   display: flex;
   align-items: center;
   justify-content: center;
   background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
   overflow: hidden;
}

.hero-container {
   position: relative;
   z-index: 2;
   text-align: center;
}

/* 粒子动画背景 */
.particles {
   position: absolute;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   z-index: 1;
}

.particle {
   position: absolute;
   background: var(--primary-color);
   border-radius: 50%;
   opacity: 0.6;
   animation: float 6s ease-in-out infinite;
}

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

/* 英雄内容样式 */
.hero-content {
   max-width: 800px;
   margin: 0 auto;
}

.hero-title {
   font-size: 3.5rem;
   font-weight: bold;
   margin-bottom: var(--spacing-sm);
   background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
   -webkit-background-clip: text;
   -webkit-text-fill-color: transparent;
   background-clip: text;
}

.typing-text {
   font-family: var(--font-mono);
}

.cursor {
   animation: blink 1s infinite;
}

@keyframes blink {
   0%, 50% { opacity: 1; }
   51%, 100% { opacity: 0; }
}

.hero-subtitle {
   font-size: 1.2rem;
   color: var(--text-secondary);
   margin-bottom: var(--spacing-lg);
}

.hero-buttons {
   display: flex;
   gap: var(--spacing-sm);
   justify-content: center;
   flex-wrap: wrap;
}

/* ===== 新的科技感滚动提示样式 ===== */
.tech-scroll-indicator {
   position: absolute;
   bottom: 30px;
   left: 50%;
   transform: translateX(-50%);
   display: flex;
   flex-direction: column;
   align-items: center;
   gap: 10px;
   transition: opacity var(--transition-normal);
}

.tech-scroll-text {
   font-family: var(--font-mono);
   color: var(--text-secondary);
   font-size: 0.9rem;
   letter-spacing: 2px;
   text-transform: uppercase;
   opacity: 0.8;
}

.tech-scroll-dots {
   display: flex;
   gap: 8px;
}

.tech-scroll-dots .dot {
   width: 8px;
   height: 8px;
   background-color: var(--primary-color);
   border-radius: 50%;
   opacity: 0.6;
}

.tech-scroll-dots .dot:nth-child(1) {
   animation: pulse 1.5s infinite;
}

.tech-scroll-dots .dot:nth-child(2) {
   animation: pulse 1.5s infinite 0.5s;
}

.tech-scroll-dots .dot:nth-child(3) {
   animation: pulse 1.5s infinite 1s;
}

.tech-scroll-line {
   width: 2px;
   height: 40px;
   background: linear-gradient(to bottom, var(--primary-color), transparent);
   position: relative;
   overflow: hidden;
}

.tech-scroll-line::after {
   content: '';
   position: absolute;
   top: -50%;
   left: 0;
   width: 100%;
   height: 50%;
   background-color: rgba(255, 255, 255, 0.8);
   animation: line-flow 2s infinite;
}

@keyframes pulse {
   0%, 100% { transform: scale(1); opacity: 0.6; }
   50% { transform: scale(1.5); opacity: 1; }
}

@keyframes line-flow {
   0% { transform: translateY(0); }
   100% { transform: translateY(200%); }
}

/* ===== 章节标题样式 ===== */
.section-title {
   font-size: 2.5rem;
   text-align: center;
   margin-bottom: var(--spacing-sm);
   background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
   -webkit-background-clip: text;
   -webkit-text-fill-color: transparent;
   background-clip: text;
}

.section-subtitle {
   text-align: center;
   color: var(--text-secondary);
   margin-bottom: var(--spacing-lg);
   font-size: 1.1rem;
}

/* ===== 关于我区域样式 ===== */
.about {
   padding: var(--spacing-xl) 0;
   background: var(--bg-secondary);
}

.about-content {
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: var(--spacing-lg);
   align-items: center;
}

.about-description {
   font-size: 1.1rem;
   line-height: 1.8;
   color: var(--text-secondary);
   margin-bottom: var(--spacing-lg);
}

/* 技能进度条样式 */
.skills {
   display: flex;
   flex-direction: column;
   gap: var(--spacing-sm);
}

.skill-item {
   margin-bottom: var(--spacing-sm);
}

.skill-info {
   display: flex;
   justify-content: space-between;
   margin-bottom: var(--spacing-xs);
}

.skill-name {
   font-weight: 600;
   color: var(--text-primary);
}

.skill-percentage {
   color: var(--primary-color);
   font-weight: 600;
}

.skill-bar {
   height: 8px;
   background: var(--bg-tertiary);
   border-radius: 4px;
   overflow: hidden;
}

.skill-progress {
   height: 100%;
   background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
   width: 0;
   transition: width 2s ease;
   border-radius: 4px;
}

/* 个人图片样式 */
.about-image {
   text-align: center;
}

.image-container {
   position: relative;
   display: inline-block;
}

.profile-img {
   width: 300px;
   height: 300px;
   border-radius: 50%;
   border: 4px solid var(--primary-color);
   transition: transform var(--transition-normal);
}

.profile-img:hover {
   transform: scale(1.05);
}

.image-overlay {
   position: absolute;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   background: linear-gradient(45deg, transparent, rgba(0, 255, 136, 0.2));
   border-radius: 50%;
   opacity: 0;
   transition: opacity var(--transition-normal);
}

.image-container:hover .image-overlay {
   opacity: 1;
}

/* ===== 作品集区域样式 ===== */
.portfolio {
   padding: var(--spacing-xl) 0;
   background: var(--bg-primary);
}

/* 作品过滤器样式 */
.portfolio-filters {
   display: flex;
   justify-content: center;
   gap: var(--spacing-sm);
   margin-bottom: var(--spacing-lg);
   flex-wrap: wrap;
}

.filter-btn {
   padding: 10px 20px;
   background: transparent;
   border: 2px solid var(--bg-tertiary);
   color: var(--text-secondary);
   border-radius: var(--border-radius);
   cursor: pointer;
   transition: all var(--transition-normal);
}

.filter-btn.active,
.filter-btn:hover {
   background: var(--primary-color);
   color: var(--bg-primary);
   border-color: var(--primary-color);
}

/* 作品网格样式 */
.portfolio-grid {
   display: grid;
   grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
   gap: var(--spacing-md);
}

.portfolio-item {
   opacity: 1;
   transform: scale(1);
   transition: all var(--transition-normal);
}

.portfolio-item.hidden {
   opacity: 0;
   transform: scale(0.8);
   pointer-events: none;
}

/* 作品卡片样式 */
.portfolio-card {
   background: var(--bg-secondary);
   border-radius: var(--border-radius-lg);
   overflow: hidden;
   transition: transform var(--transition-normal);
   box-shadow: var(--shadow-sm);
}

.portfolio-card:hover {
   transform: translateY(-10px);
   box-shadow: var(--shadow-lg);
}

.card-image {
   position: relative;
   overflow: hidden;
}

.card-image img {
   width: 100%;
   height: 250px;
   object-fit: cover;
   transition: transform var(--transition-slow);
}

.card-overlay {
   position: absolute;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   background: rgba(0, 0, 0, 0.8);
   display: flex;
   align-items: center;
   justify-content: center;
   opacity: 0;
   transition: opacity var(--transition-normal);
}

.card-image:hover .card-overlay {
   opacity: 1;
}

.card-image:hover img {
   transform: scale(1.1);
}

.card-actions {
   display: flex;
   gap: var(--spacing-sm);
}

.card-content {
   padding: var(--spacing-md);
}

.card-title {
   font-size: 1.3rem;
   margin-bottom: var(--spacing-xs);
   color: var(--text-primary);
}

.card-description {
   color: var(--text-secondary);
   margin-bottom: var(--spacing-sm);
   line-height: 1.6;
}

.card-tags {
   display: flex;
   gap: var(--spacing-xs);
   flex-wrap: wrap;
}

.tag {
   padding: 4px 8px;
   background: var(--bg-tertiary);
   color: var(--primary-color);
   border-radius: 4px;
   font-size: 0.8rem;
   font-weight: 500;
}

/* ===== 联系我区域样式 ===== */
.contact {
   padding: var(--spacing-xl) 0;
   background: var(--bg-secondary);
}

.contact-content {
   display: grid;
   grid-template-columns: 1fr 1fr;
   gap: var(--spacing-lg);
}

/* 联系信息样式 */
.contact-info {
   display: flex;
   flex-direction: column;
   gap: var(--spacing-md);
}

.contact-item {
   display: flex;
   align-items: center;
   gap: var(--spacing-sm);
   padding: var(--spacing-sm);
   background: var(--bg-tertiary);
   border-radius: var(--border-radius);
   transition: transform var(--transition-normal);
}

.contact-item:hover {
   transform: translateX(10px);
}

.contact-icon {
   width: 50px;
   height: 50px;
   background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
   border-radius: 50%;
   display: flex;
   align-items: center;
   justify-content: center;
   color: var(--bg-primary);
   font-size: 1.2rem;
}

.contact-details h3 {
   color: var(--text-primary);
   margin-bottom: 4px;
}

.contact-details p {
   color: var(--text-secondary);
}

/* 社交媒体链接样式 */
.social-links {
   display: flex;
   gap: var(--spacing-sm);
   margin-top: var(--spacing-sm);
}

.social-link {
   width: 50px;
   height: 50px;
   background: var(--bg-tertiary);
   border-radius: 50%;
   display: flex;
   align-items: center;
   justify-content: center;
   color: var(--text-secondary);
   text-decoration: none;
   transition: all var(--transition-normal);
}

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

/* 联系表单样式 */
.contact-form {
   background: var(--bg-tertiary);
   padding: var(--spacing-lg);
   border-radius: var(--border-radius-lg);
}

.form-group {
   margin-bottom: var(--spacing-sm);
}

.form-group input,
.form-group textarea {
   width: 100%;
   padding: 12px 16px;
   background: var(--bg-secondary);
   border: 2px solid transparent;
   border-radius: var(--border-radius);
   color: var(--text-primary);
   font-size: 1rem;
   transition: border-color var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
   outline: none;
   border-color: var(--primary-color);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
   color: var(--text-muted);
}

/* ===== 页脚样式 ===== */
.footer {
   background: var(--bg-primary);
   padding: var(--spacing-md) 0;
   border-top: 1px solid var(--bg-tertiary);
}

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

.footer-logo {
   display: flex;
   align-items: center;
   gap: var(--spacing-xs);
}

.footer-text {
   color: var(--text-muted);
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
   position: fixed;
   bottom: 30px;
   right: 30px;
   width: 50px;
   height: 50px;
   background: var(--primary-color);
   color: var(--bg-primary);
   border: none;
   border-radius: 50%;
   cursor: pointer;
   opacity: 0;
   visibility: hidden;
   transition: all var(--transition-normal);
   z-index: 1000;
}

.back-to-top.visible {
   opacity: 1;
   visibility: visible;
}

.back-to-top:hover {
   background: var(--secondary-color);
   transform: translateY(-5px);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
   /* 导航栏响应式 */
   .hamburger {
       display: flex;
   }
   
   .nav-menu {
       position: fixed;
       top: 70px;
       left: -100%;
       width: 100%;
       height: calc(100vh - 70px);
       background: var(--bg-secondary);
       flex-direction: column;
       justify-content: flex-start;
       align-items: center;
       padding-top: var(--spacing-lg);
       transition: left var(--transition-normal);
   }
   
   .nav-menu.active {
       left: 0;
   }
   
   .nav-item {
       margin: var(--spacing-sm) 0;
   }
   
   /* 英雄区域响应式 */
   .hero-title {
       font-size: 2.5rem;
   }
   
   .hero-buttons {
       flex-direction: column;
       align-items: center;
   }
   
   /* 关于我区域响应式 */
   .about-content {
       grid-template-columns: 1fr;
       text-align: center;
   }
   
   .profile-img {
       width: 250px;
       height: 250px;
   }
   
   /* 作品集响应式 */
   .portfolio-grid {
       grid-template-columns: 1fr;
   }
   
   /* 联系我区域响应式 */
   .contact-content {
       grid-template-columns: 1fr;
   }
   
   /* 页脚响应式 */
   .footer-content {
       flex-direction: column;
       gap: var(--spacing-sm);
       text-align: center;
   }
}

@media (max-width: 480px) {
   .hero-title {
       font-size: 2rem;
   }
   
   .section-title {
       font-size: 2rem;
   }
   
   .portfolio-filters {
       flex-direction: column;
       align-items: center;
   }
   
   .contact-item {
       flex-direction: column;
       text-align: center;
   }
}