/* ===== 全局重置与变量 ===== */
:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a2235;
    --bg-card-hover: #222d44;
    --accent-green: #4ade80;
    --accent-green-dark: #22c55e;
    --accent-green-light: #86efac;
    --accent-blue: #3b82f6;
    --accent-purple: #a855f7;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #2a3550;
    --gradient-green: linear-gradient(135deg, #4ade80, #22c55e);
    --gradient-hero: linear-gradient(135deg, #4ade80, #3b82f6, #a855f7);
    --shadow-glow: 0 0 40px rgba(74, 222, 128, 0.15);
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
    --radius: 16px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 26, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 14, 26, 0.95);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
}

.logo-icon {
    font-size: 1.6rem;
}

.accent {
    color: var(--accent-green);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-green);
    background: rgba(74, 222, 128, 0.1);
}

.nav-cta {
    text-decoration: none;
    color: var(--bg-primary);
    background: var(--gradient-green);
    padding: 10px 24px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(74, 222, 128, 0.3);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero 区 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 120px 24px 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(74, 222, 128, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(74, 222, 128, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.floating-blocks {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.block {
    position: absolute;
    font-size: 3rem;
    opacity: 0.15;
    animation: float 20s infinite ease-in-out;
}

.block-1 { top: 15%; left: 10%; animation-delay: 0s; }
.block-2 { top: 25%; right: 15%; animation-delay: 3s; }
.block-3 { bottom: 30%; left: 20%; animation-delay: 6s; }
.block-4 { top: 60%; right: 10%; animation-delay: 9s; }
.block-5 { bottom: 15%; right: 25%; animation-delay: 12s; }

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(30px, -30px) rotate(90deg); }
    50% { transform: translate(-20px, 20px) rotate(180deg); }
    75% { transform: translate(20px, 30px) rotate(270deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.3);
    border-radius: 100px;
    font-size: 0.9rem;
    color: var(--accent-green);
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: 'JetBrains Mono', monospace;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-green);
    color: var(--bg-primary);
    box-shadow: 0 4px 20px rgba(74, 222, 128, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(74, 222, 128, 0.4);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-green);
    transform: translateY(-3px);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--accent-green);
    font-family: 'JetBrains Mono', monospace;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    margin: 8px auto 0;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(45deg);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: rotate(45deg) translate(0, 0); }
    50% { transform: rotate(45deg) translate(4px, 4px); }
}

/* ===== 通用 Section ===== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.2);
    border-radius: 100px;
    font-size: 0.85rem;
    color: var(--accent-green);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 关于我们 ===== */
.about {
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.about-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-4px);
    border-color: rgba(74, 222, 128, 0.3);
    box-shadow: var(--shadow-glow);
}

.about-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--accent-green);
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 项目展示 ===== */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: rgba(74, 222, 128, 0.3);
    box-shadow: var(--shadow-card), var(--shadow-glow);
}

.project-card.featured {
    grid-column: span 2;
    border-color: rgba(74, 222, 128, 0.3);
    background: linear-gradient(135deg, var(--bg-card), rgba(74, 222, 128, 0.05));
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 20px;
}

.project-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(74, 222, 128, 0.1);
    border-radius: 12px;
}

.project-icon.large {
    width: 72px;
    height: 72px;
    font-size: 3rem;
}

.project-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.badge {
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-hot { background: rgba(239, 68, 68, 0.15); color: #f87171; }
.badge-version { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.badge-new { background: rgba(168, 85, 247, 0.15); color: #c084fc; }
.badge-service { background: rgba(74, 222, 128, 0.15); color: var(--accent-green); }
.badge-doc { background: rgba(251, 191, 36, 0.15); color: #fbbf24; }

.project-name {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.project-tagline {
    color: var(--accent-green);
    font-size: 0.95rem;
    margin-bottom: 16px;
    font-weight: 500;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
    flex-grow: 1;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.tech-tag {
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.project-stats {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.project-links {
    display: flex;
    gap: 16px;
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

.project-link {
    text-decoration: none;
    color: var(--accent-green);
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
}

.project-link:hover {
    color: var(--accent-green-light);
    text-decoration: underline;
}

/* ===== 技术栈 ===== */
.tech {
    background: var(--bg-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 20px;
}

.tech-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
}

.tech-item:hover {
    transform: translateY(-4px);
    border-color: rgba(74, 222, 128, 0.3);
    box-shadow: var(--shadow-glow);
}

.tech-logo {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 900;
    color: white;
    font-family: 'JetBrains Mono', monospace;
}

.tech-item h4 {
    font-size: 1rem;
    margin-bottom: 6px;
}

.tech-item p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== 数据统计横幅 ===== */
.stats-banner {
    background: var(--gradient-green);
    padding: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 24px;
    text-align: center;
}

.stat-banner-item {
    color: var(--bg-primary);
}

.stat-banner-number {
    font-size: 3rem;
    font-weight: 900;
    font-family: 'JetBrains Mono', monospace;
    margin-bottom: 8px;
}

.stat-banner-label {
    font-size: 1rem;
    font-weight: 600;
    opacity: 0.9;
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 36px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    text-align: center;
}

.contact-card:hover {
    transform: translateY(-4px);
    border-color: rgba(74, 222, 128, 0.3);
    box-shadow: var(--shadow-glow);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--accent-green);
    display: flex;
    justify-content: center;
}

.contact-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.contact-card p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 0.95rem;
}

.contact-link {
    color: var(--accent-green);
    font-weight: 600;
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-brand .nav-logo {
    margin-bottom: 16px;
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.footer-col h4 {
    font-size: 0.95rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-col a {
    display: block;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 10px;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--accent-green);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.footer-meta {
    font-size: 0.8rem !important;
    opacity: 0.7;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-secondary);
        padding: 16px;
        border-bottom: 1px solid var(--border);
        gap: 4px;
    }

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

    .nav-cta {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .project-card.featured {
        grid-column: span 1;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 2rem;
    }

    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .footer-links {
        grid-template-columns: 1fr;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}