/* =========================================
   DZ 个人网站 - 科技风格样式
   ========================================= */

:root {
    --bg-primary: #05070d;
    --bg-secondary: #0a0f1c;
    --bg-card: rgba(16, 24, 45, 0.6);
    --neon-cyan: #00f0ff;
    --neon-purple: #9d4edd;
    --neon-green: #39ff14;
    --neon-pink: #ff2ec4;
    --text-primary: #e0e7ff;
    --text-secondary: #8b93b0;
    --text-muted: #5a627d;
    --border-color: rgba(0, 240, 255, 0.2);
    --font-title: 'Orbitron', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --glow-cyan: 0 0 20px rgba(0, 240, 255, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-mono);
    overflow-x: hidden;
    line-height: 1.7;
}

::selection {
    background: var(--neon-cyan);
    color: #000;
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--neon-cyan);
    border-radius: 4px;
}

/* ============ 背景 ============ */
.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 240, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -2;
    pointer-events: none;
}

#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* ============ 导航栏 ============ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 4rem;
    z-index: 100;
    transition: all 0.4s ease;
    background: transparent;
}

.navbar.scrolled {
    background: rgba(5, 7, 13, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.6rem 4rem;
}

.nav-brand {
    font-family: var(--font-title);
    font-size: 1.6rem;
    font-weight: 900;
    letter-spacing: 2px;
}

.brand-name {
    color: var(--neon-cyan);
    text-shadow: var(--glow-cyan);
}

.brand-bracket {
    color: var(--neon-purple);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    letter-spacing: 1px;
    position: relative;
    padding: 0.3rem 0;
    transition: color 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--neon-cyan);
    box-shadow: var(--glow-cyan);
    transition: width 0.3s;
}

.nav-link:hover,
.nav-link.active {
    color: var(--neon-cyan);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--neon-cyan);
    transition: all 0.3s;
}

/* ============ 首页 Hero ============ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    position: relative;
    padding: 0 2rem;
}

.hero-content {
    text-align: center;
    z-index: 1;
}

.hero-greeting {
    color: var(--neon-green);
    font-size: 1rem;
    margin-bottom: 1rem;
    letter-spacing: 3px;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
    font-family: var(--font-title);
    font-size: clamp(2.5rem, 8vw, 5.5rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    min-height: 1.4em;
}

.type-wrap {
    color: var(--neon-cyan);
    text-shadow: var(--glow-cyan);
}

.cursor {
    color: var(--neon-purple);
    animation: blink 0.8s infinite;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    letter-spacing: 2px;
    margin-bottom: 2.5rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.3s forwards;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.5s forwards;
}

.btn {
    padding: 0.9rem 2.5rem;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    letter-spacing: 1px;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--neon-cyan);
    color: #000;
    font-weight: 600;
    box-shadow: var(--glow-cyan);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
}

.btn-ghost {
    background: transparent;
    color: var(--neon-cyan);
    border: 1px solid var(--neon-cyan);
}

.btn-ghost:hover {
    background: rgba(0, 240, 255, 0.1);
    transform: translateY(-3px);
}

.hero-stats {
    display: flex;
    gap: 4rem;
    justify-content: center;
    margin-top: 4rem;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.7s forwards;
}

.stat {
    text-align: center;
}

.stat-num {
    display: block;
    font-family: var(--font-title);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--neon-purple);
    text-shadow: 0 0 15px rgba(157, 78, 221, 0.5);
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    letter-spacing: 2px;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 3px;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    margin: 0.5rem auto 0;
    position: relative;
}

.mouse::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--neon-cyan);
    border-radius: 2px;
    animation: scrollWheel 1.5s infinite;
}

/* ============ 通用 Section ============ */
.section {
    padding: 6rem 0;
    position: relative;
}

.section-alt {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-header {
    margin-bottom: 4rem;
}

.section-tag {
    color: var(--neon-cyan);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: inline-block;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.section-title {
    font-family: var(--font-title);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease 0.1s;
}

.section-title::before {
    content: '#';
    color: var(--neon-purple);
    margin-right: 0.5rem;
}

.section.visible .section-tag,
.section.visible .section-title {
    opacity: 1;
    transform: translateY(0);
}

/* ============ 关于我 ============ */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-card {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s ease;
}

.about-info {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.6s ease 0.2s;
}

.section.visible .about-card,
.section.visible .about-info {
    opacity: 1;
    transform: translateX(0);
}

.terminal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.1);
}

.terminal-header {
    background: rgba(255, 255, 255, 0.05);
    padding: 0.8rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.terminal-title {
    margin-left: 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.terminal-body {
    padding: 1.5rem;
    font-size: 0.9rem;
}

.prompt {
    color: var(--neon-green);
}

.terminal-body p {
    margin-bottom: 0.5rem;
}

.terminal-output {
    color: var(--text-secondary);
    padding-left: 1rem;
    border-left: 2px solid var(--neon-purple);
}

.about-info h3 {
    font-family: var(--font-title);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.highlight {
    color: var(--neon-cyan);
    text-shadow: var(--glow-cyan);
}

.about-info p {
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
}

.skill-bars {
    margin-top: 2rem;
}

.skill {
    margin-bottom: 1.5rem;
}

.skill-head {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.skill-pct {
    color: var(--neon-cyan);
}

.skill-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
}

.skill-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    border-radius: 3px;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.6);
    transition: width 1.5s ease;
}

/* ============ 项目 ============ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(30px);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--neon-cyan);
    box-shadow: 0 10px 30px rgba(0, 240, 255, 0.15);
}

.project-card:hover::before {
    transform: scaleX(1);
}

/* 可点击进入游戏的项目卡片 */
.project-playable {
    cursor: pointer;
}

.project-playable .play-now {
    display: inline-block;
    margin-top: 0.8rem;
    color: var(--neon-green);
    font-size: 0.8rem;
    letter-spacing: 1px;
    opacity: 0;
    transform: translateY(5px);
    transition: all 0.3s ease;
}

.project-playable:hover .play-now {
    opacity: 1;
    transform: translateY(0);
    text-shadow: 0 0 10px rgba(57, 255, 20, 0.6);
}

.project-playable:focus {
    outline: 2px solid var(--neon-cyan);
    outline-offset: 2px;
}

.section.visible .project-card {
    opacity: 1;
    transform: translateY(0);
}

.project-card:nth-child(2),
.project-card:nth-child(4) {
    transition-delay: 0.2s;
}

.project-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.project-title {
    font-family: var(--font-title);
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.2rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech {
    background: rgba(0, 240, 255, 0.1);
    color: var(--neon-cyan);
    border: 1px solid rgba(0, 240, 255, 0.3);
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    border-radius: 20px;
}

/* ============ 联系 ============ */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2.5rem 2rem;
    text-align: center;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(30px);
}

.contact-card:hover {
    transform: translateY(-10px);
    border-color: var(--neon-purple);
    box-shadow: 0 10px 30px rgba(157, 78, 221, 0.2);
}

.section.visible .contact-card {
    opacity: 1;
    transform: translateY(0);
}

.contact-card:nth-child(2) {
    transition-delay: 0.12s;
}

.contact-card:nth-child(3) {
    transition-delay: 0.24s;
}

.contact-card:nth-child(4) {
    transition-delay: 0.36s;
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-card h3 {
    font-family: var(--font-title);
    color: var(--text-primary);
    margin-bottom: 0.8rem;
}

.contact-link {
    color: var(--neon-cyan);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.contact-link:hover {
    color: var(--neon-pink);
    text-shadow: 0 0 15px rgba(255, 46, 196, 0.5);
}

/* QQ 复制按钮 */
.qq-copy {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    font-family: var(--font-mono);
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
}

.qq-copy:hover {
    color: var(--neon-pink);
    text-shadow: 0 0 15px rgba(255, 46, 196, 0.5);
}

.qq-num {
    font-size: 1rem;
    letter-spacing: 1px;
}

.qq-tip {
    font-size: 0.7rem;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    padding: 0.15rem 0.6rem;
    border-radius: 12px;
    opacity: 0.8;
    transition: all 0.3s;
}

.qq-copy.copied .qq-tip {
    color: var(--neon-green);
    border-color: var(--neon-green);
    text-shadow: none;
}

/* ============ 页脚 ============ */
.footer {
    padding: 3rem 2rem;
    text-align: center;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
}

.footer-code {
    color: var(--neon-green);
    margin-top: 1rem;
}

.heart {
    color: var(--neon-pink);
    animation: pulse 1s infinite;
}

/* ============ 动画 ============ */
@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scrollWheel {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(15px); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.3); }
}

.cursor-blink {
    animation: blink 1s infinite;
}

/* ============ 响应式 ============ */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem 1.5rem;
    }

    .navbar.scrolled {
        padding: 0.6rem 1.5rem;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2.5rem;
        transition: right 0.4s ease;
        border-left: 1px solid var(--border-color);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 101;
    }

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

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .about-grid,
    .projects-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        gap: 2rem;
    }
}

/* ============ 贪吃蛇游戏 ============ */
.game-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 7, 13, 0.85);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.game-overlay.active {
    display: flex;
    opacity: 1;
}

.game-modal {
    background: var(--bg-secondary);
    border: 1px solid var(--neon-cyan);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 0 40px rgba(0, 240, 255, 0.3), inset 0 0 30px rgba(0, 240, 255, 0.05);
    max-width: 90vw;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.game-overlay.active .game-modal {
    transform: scale(1);
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.game-title {
    font-family: var(--font-title);
    color: var(--neon-cyan);
    text-shadow: var(--glow-cyan);
    font-size: 1.3rem;
}

.game-close {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1rem;
    width: 30px;
    height: 30px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
}

.game-close:hover {
    color: var(--neon-pink);
    border-color: var(--neon-pink);
}

.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.game-score-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-right: 0.5rem;
}

.game-score-value {
    color: var(--neon-green);
    font-family: var(--font-title);
    font-size: 1.4rem;
    font-weight: 700;
    text-shadow: 0 0 10px rgba(57, 255, 20, 0.6);
}

.game-hint {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.game-hint b {
    color: var(--neon-purple);
}

.game-canvas-wrap {
    position: relative;
    display: inline-block;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
}

#gameCanvas {
    display: block;
    background: var(--bg-primary);
    width: 400px;
    height: 400px;
}

.game-start-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    background: rgba(5, 7, 13, 0.9);
}

.game-start-overlay.hidden {
    display: none;
}

.game-start-title {
    color: var(--neon-cyan);
    font-family: var(--font-title);
    font-size: 1.2rem;
    text-shadow: var(--glow-cyan);
}

.game-start-note {
    color: var(--text-muted);
    font-size: 0.75rem;
}

.game-start-btn {
    font-size: 1rem;
    padding: 0.8rem 2.5rem;
}

@media (max-width: 480px) {
    #gameCanvas {
        width: 320px;
        height: 320px;
    }
}