/* ===========================================
   CSS变量定义
   =========================================== */
:root {
    --primary-color: #00d4ff;
    --secondary-color: #ff6b35;
    --accent-color: #ffd700;
    --bg-dark: #0a0a0a;
    --bg-light: #1a1a1a;
    --text-light: #ffffff;
    --text-gray: #b0b0b0;
    --text-dark: #333333;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --shadow-strong: 0 10px 30px rgba(0, 0, 0, 0.5);
    --border-radius: 15px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

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

/* ===========================================
   粒子背景动画
   =========================================== */
#particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(45deg, #0a0a0a, #1a1a1a, #0a0a0a);
    background-size: 400% 400%;
    animation: gradientShift 10s ease infinite;
}

#particles-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 107, 53, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 215, 0, 0.1) 0%, transparent 50%);
    animation: particleFloat 20s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

@keyframes particleFloat {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-30px) rotate(120deg); }
    66% { transform: translateY(20px) rotate(240deg); }
}

/* ===========================================
   导航栏样式
   =========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    box-shadow: var(--shadow-strong);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-family: 'Orbitron', monospace;
    font-size: 1.5rem;
    font-weight: 900;
}

.logo-text {
    background: var(--gradient-3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: logoGlow 2s ease-in-out infinite alternate;
}

.logo-dot {
    color: var(--secondary-color);
    animation: dotPulse 1s ease-in-out infinite;
}

@keyframes logoGlow {
    from { filter: brightness(1); }
    to { filter: brightness(1.2); }
}

@keyframes dotPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.7; }
}

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

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: var(--transition);
    padding: 0.5rem 0;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-3);
    transition: var(--transition);
}

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

.nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-light);
    margin: 3px 0;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* ===========================================
   英雄区域样式
   =========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 0 2rem;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    width: 100%;
}

.hero-text {
    z-index: 2;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.typing-text {
    display: block;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 400;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.highlight-name {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textGlow 3s ease-in-out infinite alternate;
}

@keyframes textGlow {
    from { filter: brightness(1) drop-shadow(0 0 10px rgba(102, 126, 234, 0.5)); }
    to { filter: brightness(1.2) drop-shadow(0 0 20px rgba(102, 126, 234, 0.8)); }
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 500;
}

.hero-description {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    color: var(--text-gray);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-3);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 212, 255, 0.4);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

/* 3D立方体动画 */
.floating-cube {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
    perspective: 1000px;
}

.cube {
    width: 200px;
    height: 200px;
    position: relative;
    transform-style: preserve-3d;
    animation: rotate3D 10s linear infinite;
}

.face {
    position: absolute;
    width: 200px;
    height: 200px;
    background: var(--gradient-1);
    border: 2px solid var(--primary-color);
    opacity: 0.8;
    backdrop-filter: blur(10px);
}

.face.front { transform: rotateY(0deg) translateZ(100px); }
.face.back { transform: rotateY(180deg) translateZ(100px); }
.face.right { transform: rotateY(90deg) translateZ(100px); }
.face.left { transform: rotateY(-90deg) translateZ(100px); }
.face.top { transform: rotateX(90deg) translateZ(100px); }
.face.bottom { transform: rotateX(-90deg) translateZ(100px); }

@keyframes rotate3D {
    0% { transform: rotateX(0deg) rotateY(0deg) rotateZ(0deg); }
    100% { transform: rotateX(360deg) rotateY(360deg) rotateZ(360deg); }
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-gray);
    animation: bounce 2s infinite;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--text-gray);
    border-radius: 25px;
    position: relative;
    margin: 0 auto 10px;
}

.wheel {
    width: 4px;
    height: 10px;
    background: var(--text-gray);
    border-radius: 2px;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes scroll {
    0% { top: 10px; opacity: 1; }
    100% { top: 30px; opacity: 0; }
}

/* ===========================================
   章节标题样式
   =========================================== */
.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient-2);
    border-radius: 2px;
}

/* ===========================================
   关于我部分
   =========================================== */
.about {
    padding: 5rem 0;
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-gray);
    line-height: 1.8;
}

.stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

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

.about-image {
    display: flex;
    justify-content: center;
}

.image-frame {
    position: relative;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--gradient-1);
    padding: 5px;
}

.image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.hologram-effect {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(0, 212, 255, 0.3), transparent);
    animation: hologramScan 3s linear infinite;
}

@keyframes hologramScan {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===========================================
   技能部分
   =========================================== */
.skills {
    padding: 5rem 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.skill-category {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-strong);
}

.skill-category h3 {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--primary-color);
}

.skill-item {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.skill-icon {
    font-size: 2rem;
    margin-right: 1rem;
    color: var(--primary-color);
    width: 50px;
    text-align: center;
}

.skill-item span {
    flex: 1;
    margin-right: 1rem;
    font-weight: 500;
}

.skill-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-3);
    border-radius: 4px;
    width: 0;
    transition: width 2s ease;
    position: relative;
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
    animation: progressShine 2s ease-in-out infinite;
}

@keyframes progressShine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* ===========================================
   作品集部分
   =========================================== */
.portfolio {
    padding: 5rem 0;
    background: var(--bg-light);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 3rem;
    justify-content: center;
}

.portfolio-item {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
    height: 300px;
}

.portfolio-item:hover {
    transform: translateY(-15px) scale(1.05);
    box-shadow: var(--shadow-strong);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 100%;
}

/* 自定义预览卡片样式 */
.portfolio-preview {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: var(--transition);
}

.portfolio-preview::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, var(--gradient-1));
    opacity: 0.8;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-preview::before {
    opacity: 0.9;
    transform: scale(1.1);
}

.preview-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    transition: var(--transition);
}

.portfolio-item:hover .preview-content {
    transform: scale(1.1);
}

.preview-content i {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
    animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.preview-content h4 {
    font-family: 'Orbitron', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.preview-content span {
    font-size: 1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* 不同项目类型的颜色主题 */
.e-commerce::before {
    background: var(--gradient-3);
}

.e-commerce .preview-content i {
    color: #00f2fe;
}

.crypto-tool::before {
    background: linear-gradient(135deg, #8b5cf6 0%, #a855f7 100%);
}

.crypto-tool .preview-content i {
    color: #c084fc;
}

.aes-decrypt::before {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.aes-decrypt .preview-content i {
    color: #fbbf24;
}

.mobile-app::before {
    background: var(--gradient-2);
}

.mobile-app .preview-content i {
    color: #f5576c;
}

.dashboard::before {
    background: var(--gradient-4);
}

.dashboard .preview-content i {
    color: #38f9d7;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.95), rgba(26, 26, 26, 0.95));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    backdrop-filter: blur(20px);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-info {
    text-align: center;
    padding: 2.5rem;
    max-width: 100%;
}

.portfolio-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1.2rem;
    color: var(--primary-color);
    font-weight: 700;
}

.portfolio-info p {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    font-size: 0.95rem;
}

.portfolio-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.portfolio-tech span {
    background: var(--gradient-3);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 25px;
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: 0 2px 10px rgba(0, 212, 255, 0.3);
    transition: var(--transition);
}

.portfolio-tech span:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 212, 255, 0.5);
}

.portfolio-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.portfolio-link {
    width: 50px;
    height: 50px;
    background: var(--gradient-2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    font-size: 1.2rem;
}

.portfolio-link::before {
    content: attr(title);
    position: absolute;
    bottom: -35px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 5px;
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.portfolio-link:hover::before {
    opacity: 1;
}

.portfolio-link:hover {
    transform: translateY(-5px) scale(1.15);
    box-shadow: 0 10px 25px rgba(240, 147, 251, 0.5);
}

.portfolio-link:nth-child(1) {
    background: var(--gradient-3);
}

.portfolio-link:nth-child(1):hover {
    box-shadow: 0 10px 25px rgba(0, 212, 255, 0.5);
}

.portfolio-link:nth-child(2) {
    background: var(--gradient-4);
}

.portfolio-link:nth-child(2):hover {
    box-shadow: 0 10px 25px rgba(67, 174, 123, 0.5);
}

/* ===========================================
   联系部分
   =========================================== */
.contact {
    padding: 5rem 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.contact-info p {
    color: var(--text-gray);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-glow);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    font-size: 1.2rem;
    color: white;
}

.contact-details {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 0.9rem;
    color: var(--text-gray);
    margin-bottom: 0.2rem;
}

.contact-value {
    font-weight: 500;
    color: var(--text-light);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.social-link {
    width: 50px;
    height: 50px;
    background: var(--gradient-2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-link:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-glow);
}

/* 联系表单样式 */
.contact-form {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    color: var(--text-light);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-glow);
    background: rgba(255, 255, 255, 0.15);
}

.form-group label {
    position: absolute;
    top: 1rem;
    left: 1rem;
    color: var(--text-gray);
    font-size: 1rem;
    transition: var(--transition);
    pointer-events: none;
}

.form-group input:focus + label,
.form-group textarea:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -0.5rem;
    left: 0.5rem;
    font-size: 0.8rem;
    color: var(--primary-color);
    background: var(--bg-dark);
    padding: 0 0.5rem;
}

/* ===========================================
   页脚样式
   =========================================== */
.footer {
    background: var(--bg-light);
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.footer-text .heart {
    color: var(--secondary-color);
    animation: heartbeat 2s ease-in-out infinite;
}

.footer-text .code {
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
}

@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

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

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* ===========================================
   响应式设计
   =========================================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: rgba(10, 10, 10, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 3rem;
        transition: var(--transition);
    }

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

    .hamburger {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .stats {
        justify-content: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .portfolio-item {
        height: 280px;
    }

    .portfolio-info {
        padding: 2rem;
    }

    .portfolio-info h3 {
        font-size: 1.5rem;
    }

    .portfolio-info p {
        font-size: 0.9rem;
    }

    .portfolio-tech {
        gap: 0.5rem;
        margin-bottom: 1.5rem;
    }

    .portfolio-tech span {
        padding: 0.3rem 0.8rem;
        font-size: 0.8rem;
    }

    .portfolio-links {
        gap: 1rem;
    }

    .portfolio-link {
        width: 45px;
        height: 45px;
        font-size: 1.1rem;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .floating-cube {
        height: 300px;
    }

    .cube {
        width: 150px;
        height: 150px;
    }

    .face {
        width: 150px;
        height: 150px;
    }

    .face.front { transform: rotateY(0deg) translateZ(75px); }
    .face.back { transform: rotateY(180deg) translateZ(75px); }
    .face.right { transform: rotateY(90deg) translateZ(75px); }
    .face.left { transform: rotateY(-90deg) translateZ(75px); }
    .face.top { transform: rotateX(90deg) translateZ(75px); }
    .face.bottom { transform: rotateX(-90deg) translateZ(75px); }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .nav-container {
        padding: 0 1rem;
    }

    .hero {
        padding: 0 1rem;
    }

    .stats {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }

    .contact-form {
        padding: 1rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    /* 作品集移动端优化 */
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .portfolio-item {
        height: 250px;
        margin: 0 auto;
        max-width: 350px;
    }

    .preview-content i {
        font-size: 2.5rem;
    }

    .preview-content h4 {
        font-size: 1.3rem;
    }

    .portfolio-info {
        padding: 1.5rem;
    }

    .portfolio-info h3 {
        font-size: 1.3rem;
    }

    .portfolio-info p {
        font-size: 0.85rem;
        line-height: 1.6;
    }

    .portfolio-tech {
        gap: 0.4rem;
        margin-bottom: 1.2rem;
    }

    .portfolio-tech span {
        padding: 0.2rem 0.6rem;
        font-size: 0.75rem;
    }

    .portfolio-links {
        gap: 0.8rem;
    }

    .portfolio-link {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .portfolio-link::before {
        font-size: 0.7rem;
        bottom: -30px;
    }
}

/* ===========================================
   自定义滚动条
   =========================================== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* ===========================================
   加载动画（可选）
   =========================================== */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.5s ease;
}

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

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(0, 212, 255, 0.3);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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