/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #84FAF0;
    --primary-dark: #5de0d5;
    --secondary: #6cd4ff;
    --accent: #a0f3ff;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #0a0e1a;
    --dark-light: #141824;
    --light: #f8fafc;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: rgba(132, 250, 240, 0.15);
    --shadow: rgba(0, 0, 0, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--dark);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.6;
}

/* ===== 动态背景 ===== */
.bg-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    background-image: url('public/img/bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.bg-gradient {
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(10, 14, 26, 0.6) 0%,
        rgba(20, 24, 36, 0.55) 25%,
        rgba(26, 58, 58, 0.5) 50%,
        rgba(20, 24, 36, 0.55) 75%,
        rgba(10, 14, 26, 0.6) 100%
    );
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

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

#particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

/* ===== 主容器 ===== */
.main-container {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 导航栏 ===== */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    background: rgba(10, 14, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    border-radius: 0 0 20px 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary);
}

.nav-title {
    font-size: 22px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 8px 0;
}

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

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

/* ===== 英雄区域 ===== */
.hero-section {
    padding: 80px 20px;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(132, 250, 240, 0.1);
    border: 1px solid rgba(132, 250, 240, 0.3);
    border-radius: 50px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 30px;
    animation: float 3s ease-in-out infinite;
}

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

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 25px;
    color: var(--text);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% auto;
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-muted);
    margin-bottom: 50px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===== 服务区域 ===== */
.services-section {
    padding: 60px 20px;
}

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

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text);
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-muted);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

/* ===== 服务卡片 ===== */
.service-card {
    position: relative;
    background: rgba(20, 24, 36, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 35px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
    cursor: pointer;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(132, 250, 240, 0.08) 0%, 
        rgba(108, 212, 255, 0.08) 100%
    );
    opacity: 0;
    transition: opacity 0.4s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: rgba(132, 250, 240, 0.5);
    box-shadow: 
        0 20px 50px rgba(132, 250, 240, 0.25),
        0 0 0 1px rgba(132, 250, 240, 0.1);
}

.service-card:hover::before {
    opacity: 1;
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(132, 250, 240, 0.2) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.service-card:hover .card-glow {
    opacity: 1;
}

.card-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 25px;
    border-radius: 20px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 3px;
    transition: transform 0.4s ease;
}

.service-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 17px;
}

.card-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.card-desc {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 25px;
    line-height: 1.6;
}

.card-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.card-btn:hover::before {
    left: 100%;
}

.card-btn:hover {
    transform: translateX(5px);
    box-shadow: 0 10px 30px rgba(132, 250, 240, 0.35);
}

.btn-arrow {
    width: 18px;
    height: 18px;
    transition: transform 0.3s ease;
}

.card-btn:hover .btn-arrow {
    transform: translateX(5px);
}

/* ===== 特色功能区 ===== */
.features-section {
    padding: 80px 20px;
    background: rgba(20, 24, 36, 0.3);
    border-radius: 30px;
    margin: 40px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-item {
    text-align: center;
    padding: 30px;
    background: rgba(10, 14, 26, 0.5);
    border-radius: 20px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    background: rgba(132, 250, 240, 0.08);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text);
}

.feature-item p {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===== 底部 ===== */
.footer {
    padding: 60px 20px 30px;
    border-top: 1px solid var(--border);
    margin-top: 80px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 30px;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

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

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

.footer-copyright {
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.social-btn {
    padding: 10px 20px;
    background: rgba(132, 250, 240, 0.1);
    border: 1px solid rgba(132, 250, 240, 0.3);
    border-radius: 10px;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.social-btn:hover {
    background: var(--primary);
    color: #0a0e1a;
    transform: translateY(-2px);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .navbar {
        padding: 15px 20px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 40px 20px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .service-card {
        padding: 25px;
    }
    
    .card-icon {
        width: 60px;
        height: 60px;
    }
}