/* ===== 基础重置与变量 ===== */
:root {
    --primary-bg: #0a0a1a;
    --gradient-1: #0a0a1a;
    --gradient-2: #1a0a2e;
    --gradient-3: #0a1a2a;
    --accent-cyan: #00d4ff;
    --accent-purple: #7b2dff;
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--gradient-1) 0%, var(--gradient-2) 50%, var(--gradient-3) 100%);
    background-size: 400% 400%;
    animation: gradientFlow 15s ease infinite;
}

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

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 80%, rgba(123, 45, 255, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 212, 255, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

/* 鼠标跟随光效 */
.hero::after {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    left: var(--mouse-x, 50%);
    top: var(--mouse-y, 50%);
    transform: translate(-50%, -50%);
    pointer-events: none;
    transition: left 0.3s ease-out, top 0.3s ease-out;
}

#particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
}

.company-name {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 50%, var(--accent-purple) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: textShine 3s linear infinite;
}

@keyframes textShine {
    to { background-position: 200% center; }
}

.slogan {
    font-size: clamp(1rem, 2vw, 1.5rem);
    color: var(--text-secondary);
    letter-spacing: 0.5em;
    animation: fadeInUp 1s ease 0.5s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    cursor: pointer;
    padding: 20px;
}

.scroll-indicator span {
    display: block;
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--accent-cyan);
    border-bottom: 2px solid var(--accent-cyan);
    transform: rotate(45deg);
    animation: scrollBounce 2s infinite;
    opacity: 0.6;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translate(0, 0); opacity: 0.6; }
    50% { transform: rotate(45deg) translate(5px, 5px); opacity: 1; }
}

/* ===== About Section ===== */
.about {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--gradient-3) 0%, var(--gradient-1) 100%);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
}

.section-title {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
    margin: 1rem auto 0;
    border-radius: 2px;
}

.about-text {
    max-width: 800px;
    margin: 0 auto 1.5rem;
    font-size: 1.1rem;
    color: var(--text-secondary);
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.about-text.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Services Section ===== */
.services {
    padding: 100px 0;
    background: var(--primary-bg);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(123, 45, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.subsection-title {
    font-size: 1.3rem;
    font-weight: 500;
    text-align: center;
    margin: 3rem 0 2rem;
    color: var(--text-secondary);
}

.subsection-title:first-of-type {
    margin-top: 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 2rem;
}

.service-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
    transition: left 0.5s ease;
}

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

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-cyan);
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 30px rgba(0, 212, 255, 0.1);
}

.card-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon svg {
    width: 48px;
    height: 48px;
    stroke: var(--accent-cyan);
    transition: stroke 0.3s ease;
}

.service-card:hover .card-icon svg {
    stroke: var(--accent-purple);
    filter: drop-shadow(0 0 10px var(--accent-purple));
}

.service-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.service-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== Footer ===== */
.footer {
    padding: 40px 0;
    background: var(--gradient-1);
    border-top: 1px solid var(--card-border);
    text-align: center;
}

.copyright {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.icp {
    font-size: 0.8rem;
}

.icp a {
    color: rgba(255, 255, 255, 0.4);
    text-decoration: none;
    transition: color 0.3s ease;
}

.icp a:hover {
    color: var(--accent-cyan);
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .hero {
        padding: 20px;
    }

    .slogan {
        letter-spacing: 0.2em;
    }

    .about, .services {
        padding: 60px 0;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .service-card {
        padding: 24px 20px;
    }

    .scroll-indicator {
        bottom: 20px;
    }
}

@media (max-width: 480px) {
    .company-name {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .about-text {
        font-size: 1rem;
    }
}

/* ===== 性能优化 ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}