/* 众筹上岸 - 主样式 */
:root {
    --primary: #0f766e;
    --primary-light: #14b8a6;
    --primary-dark: #0d5c56;
    --accent: #f59e0b;
    --bg-dark: #0c1222;
    --bg-card: #1a2332;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
}

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

html {
    scroll-behavior: smooth;
}

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

/* 导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    background: rgba(12, 18, 34, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
    text-decoration: none;
    letter-spacing: 0.05em;
}

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

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Hero 区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 6rem 2rem;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(20, 184, 166, 0.25), transparent),
        radial-gradient(ellipse 60% 40% at 80% 50%, rgba(245, 158, 11, 0.1), transparent),
        linear-gradient(180deg, var(--bg-dark) 0%, #0f172a 100%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 700px;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.hero-desc {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(20, 184, 166, 0.3);
}

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

.btn-outline:hover {
    background: var(--primary-light);
    color: var(--bg-dark);
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator span {
    display: block;
    width: 24px;
    height: 40px;
    border: 2px solid var(--text-muted);
    border-radius: 12px;
    position: relative;
}

.scroll-indicator span::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary-light);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 1; top: 8px; }
    50% { opacity: 0.3; top: 16px; }
}

/* 通用容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text);
}

/* 项目卡片 */
.projects {
    padding: 6rem 0;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: rgba(20, 184, 166, 0.3);
}

.project-image {
    height: 180px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--primary-light);
}

.project-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.progress-bar {
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 3px;
    transition: width 0.6s ease;
}

.project-amount {
    font-size: 0.875rem;
    color: var(--accent);
    font-weight: 600;
}

/* 关于我们 */
.about {
    padding: 6rem 0;
    background: rgba(0, 0, 0, 0.2);
}

.about-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 1.125rem;
    color: var(--text-muted);
    line-height: 1.8;
}

/* 联系我们 */
.contact {
    padding: 6rem 0;
}

.contact-info {
    text-align: center;
}

.contact-info p {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

/* 页脚 */
.footer {
    padding: 2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }
    
    .hero {
        padding: 4rem 1rem;
    }
}