/* 全局变量与重置 */
:root {
    --bg-color: #050505;
    --text-color: #f0f0f0;
    --primary-color: #00ff88; /* 赛博朋克绿 */
    --secondary-color: #00d2ff; /* 科技蓝 */
    --nav-bg: rgba(5, 5, 5, 0.8);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
    line-height: 1.6;
}

/* 动态背景 Canvas */
#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
}

/* 固定导航栏 */
.fixed-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    transition: all 0.3s ease;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-color);
}

.logo span {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

/* 通用区块设置 */
section {
    min-height: 100vh;
    padding: 100px 5% 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
    padding-bottom: 15px; /* 给英文留出空间 */
}

.section-title span {
    position: absolute;
    bottom: -15px; /* 往下移，避免重叠 */
    left: 0;
    font-size: 1rem;
    color: var(--primary-color);
    opacity: 0.5;
    letter-spacing: 5px;
    text-transform: uppercase;
    white-space: nowrap; /* 防止英文折行 */
}

/* 首页/英雄区 */
.hero {
    align-items: center;
    text-align: center;
    position: relative;
}

.hero-content {
    z-index: 1;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

/* 故障风特效文字 */
.glitch {
    position: relative;
}
.glitch::before, .glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
}
.glitch::before {
    left: 2px;
    text-shadow: -2px 0 red;
    clip: rect(24px, 550px, 90px, 0);
    animation: glitch-anim-2 3s infinite linear alternate-reverse;
}
.glitch::after {
    left: -2px;
    text-shadow: -2px 0 var(--secondary-color);
    clip: rect(85px, 550px, 140px, 0);
    animation: glitch-anim 2.5s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% { clip: rect(13px, 9999px, 86px, 0); }
    20% { clip: rect(78px, 9999px, 15px, 0); }
    40% { clip: rect(45px, 9999px, 56px, 0); }
    60% { clip: rect(98px, 9999px, 23px, 0); }
    80% { clip: rect(21px, 9999px, 78px, 0); }
    100% { clip: rect(65px, 9999px, 34px, 0); }
}
@keyframes glitch-anim-2 {
    0% { clip: rect(45px, 9999px, 12px, 0); }
    20% { clip: rect(89px, 9999px, 67px, 0); }
    40% { clip: rect(23px, 9999px, 90px, 0); }
    60% { clip: rect(76px, 9999px, 34px, 0); }
    80% { clip: rect(12px, 9999px, 56px, 0); }
    100% { clip: rect(90px, 9999px, 23px, 0); }
}

.typing-container {
    font-size: 1.5rem;
    height: 2.5rem;
    margin-bottom: 2rem;
    color: #aaa;
}

.cursor {
    animation: blink 1s infinite;
    color: var(--primary-color);
}

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

/* 按钮 */
.action-btns {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.primary-btn {
    background: var(--primary-color);
    color: var(--bg-color);
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.4);
}

.primary-btn:hover {
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.7);
    transform: translateY(-2px);
}

.secondary-btn {
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--glass-border);
}

.secondary-btn:hover {
    background: var(--glass-bg);
    border-color: var(--secondary-color);
    color: var(--secondary-color);
    transform: translateY(-2px);
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
    color: var(--primary-color);
    animation: bounce 2s infinite;
    opacity: 0.7;
}

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

/* 关于我区块 */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: #ccc;
}

.info-list {
    list-style: none;
    margin-top: 2rem;
}

.info-list li {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-list i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 3rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: transform 0.5s ease;
}

.glass-card:hover {
    transform: translateY(-10px) rotateY(10deg);
}

/* 技能区块 */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
}

.skill-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2rem 1rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.skill-item i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    display: block;
    transition: color 0.3s;
}

.skill-item:hover {
    background: rgba(0, 210, 255, 0.1);
    border-color: var(--secondary-color);
    transform: translateY(-5px);
}

.skill-item:hover i {
    color: var(--primary-color);
}

/* 滚动揭示动画 */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* 移动端可以后续补充汉堡菜单 */
    }
    
    .title {
        font-size: 2.5rem;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
}