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

:root {
    --primary: #3b82f6;
    --primary-light: #60a5fa;
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.7);
    --text: #1e293b;
    --text-muted: #64748b;
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.8);
    --shadow: rgba(0, 0, 0, 0.08);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f0fdf4 100%);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* 背景动画 */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, #bfdbfe, #c7d2fe);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #a5f3fc, #bfdbfe);
    bottom: -150px;
    right: -150px;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #ddd6fe, #fbcfe8);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -50px) scale(1.1); }
    50% { transform: translate(-30px, 30px) scale(0.95); }
    75% { transform: translate(-50px, -30px) scale(1.05); }
}

/* 毛玻璃效果 */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px var(--shadow);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 40px);
    max-width: 1200px;
    padding: 15px 30px;
    border-radius: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    animation: slideDown 0.8s ease-out;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateX(-50%) translateY(-30px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary);
}

.brand-text {
    font-size: 1.2rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s ease;
}

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

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

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

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

/* Hero 区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    padding: 120px 40px 80px;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-content {
    flex: 1;
    animation: fadeInLeft 1s ease-out;
}

@keyframes fadeInLeft {
    from { opacity: 0; transform: translateX(-50px); }
    to { opacity: 1; transform: translateX(0); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.typing-text {
    background: linear-gradient(135deg, var(--text), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cursor {
    color: var(--primary);
    animation: blink 1s infinite;
    margin-left: 5px;
}

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

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

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

.btn {
    padding: 15px 35px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    color: var(--text);
    border: 1px solid rgba(0,0,0,0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateY(-3px);
}

/* 代码展示区 */
.hero-code {
    flex: 1;
    max-width: 500px;
    border-radius: 20px;
    overflow: hidden;
    animation: fadeInRight 1s ease-out 0.3s both;
    background: rgba(30, 41, 59, 0.95);
    border: 1px solid rgba(255,255,255,0.1);
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

.code-header {
    padding: 15px 20px;
    display: flex;
    gap: 8px;
    background: rgba(0, 0, 0, 0.3);
}

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

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }

.hero-code pre {
    padding: 25px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.95rem;
    line-height: 1.8;
    overflow-x: auto;
}

.hero-code code {
    color: #e2e8f0;
}

.keyword { color: #c792ea; }
.variable { color: #82aaff; }
.property { color: #f78c6c; }
.string { color: #c3e88d; }
.function { color: #82aaff; }
.param { color: #ffcb6b; }
.number { color: #f78c6c; }

/* 笔记区域 */
.notes-section,
.projects-section,
.categories-section,
.about-section {
    padding: 100px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 60px;
    background: linear-gradient(135deg, var(--text), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.notes-grid,
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.note-card,
.project-card {
    padding: 30px;
    border-radius: 20px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px var(--shadow);
}

.note-card::before,
.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.note-card:hover,
.project-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 50px rgba(59, 130, 246, 0.15);
}

.note-card:hover::before,
.project-card:hover::before {
    opacity: 0.05;
}

.note-icon,
.project-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.note-tag,
.project-tag {
    display: inline-block;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    margin-bottom: 15px;
}

.note-card h3,
.project-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--text);
}

.note-card p,
.project-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.note-meta,
.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.project-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: color 0.3s ease;
}

.project-link:hover {
    color: var(--secondary);
}

/* 分类区域 */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.category-card {
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.4s ease;
    cursor: pointer;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px var(--shadow);
}

.category-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.8);
}

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

.category-card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--text);
}

.category-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.category-card .count {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-size: 0.85rem;
    font-weight: 600;
}

/* 关于区域 */
.about-content {
    max-width: 600px;
    margin: 0 auto;
    padding: 60px 50px;
    border-radius: 30px;
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px var(--shadow);
}

.about-avatar {
    width: 120px;
    height: 120px;
    margin: 0 auto 30px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 3px solid transparent;
    border-top-color: var(--primary);
    border-right-color: var(--secondary);
    animation: spin 3s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.avatar-text {
    font-size: 3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-content h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--text);
}

.about-content p {
    color: var(--text-muted);
    margin-bottom: 15px;
    line-height: 1.8;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

.social-btn {
    width: 50px;
    height: 50px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    transition: all 0.3s ease;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
}

.social-btn:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-5px);
    color: var(--primary);
}

/* 页脚 */
.footer {
    padding: 30px 40px;
    text-align: center;
    margin-top: 50px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.footer .icp a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* 滚动动画 */
.note-card,
.project-card,
.category-card {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease-out forwards;
}

.note-card:nth-child(1), .project-card:nth-child(1) { animation-delay: 0.1s; }
.note-card:nth-child(2), .project-card:nth-child(2) { animation-delay: 0.2s; }
.note-card:nth-child(3), .project-card:nth-child(3) { animation-delay: 0.3s; }
.note-card:nth-child(4) { animation-delay: 0.4s; }
.note-card:nth-child(5) { animation-delay: 0.5s; }
.note-card:nth-child(6) { animation-delay: 0.6s; }

.category-card:nth-child(1) { animation-delay: 0.1s; }
.category-card:nth-child(2) { animation-delay: 0.2s; }
.category-card:nth-child(3) { animation-delay: 0.3s; }
.category-card:nth-child(4) { animation-delay: 0.4s; }

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

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }

    .hero-title {
        font-size: 2.5rem;
        justify-content: center;
    }

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

    .hero-code {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 12px 20px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        padding: 20px;
        border-radius: 0 0 20px 20px;
        gap: 15px;
        margin-top: 10px;
        box-shadow: 0 10px 30px var(--shadow);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .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);
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }

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

    .notes-section,
    .projects-section,
    .categories-section,
    .about-section {
        padding: 60px 20px;
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: 40px;
    }

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

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

    .about-content {
        padding: 40px 25px;
    }
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

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

/* 选中文字样式 */
::selection {
    background: var(--primary);
    color: white;
}