/* ===== 基础重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #000000;
    --bg-secondary: #050508;
    --bg-card: rgba(255, 255, 255, 0.02);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.85);
    --text-muted: rgba(255, 255, 255, 0.6);
    --accent-purple: #a855f7;
    --accent-blue: #3b82f6;
    --accent-cyan: #22d3ee;
    --accent-pink: #ec4899;
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #a855f7 40%, #ec4899 100%);
    --gradient-hero: linear-gradient(180deg, transparent 0%, rgba(168, 85, 247, 0.1) 50%, transparent 100%);
    --gradient-glow: radial-gradient(ellipse at center, rgba(168, 85, 247, 0.15) 0%, transparent 70%);
    --border-color: rgba(255, 255, 255, 0.06);
    --card-border: rgba(255, 255, 255, 0.04);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    font-weight: 300;
    position: relative;
    z-index: 1;
}

/* ===== 粒子背景 ===== */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -999;
    opacity: 0.6;
    pointer-events: none;
}

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

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 24px 0;
    background: rgba(0, 0, 0, 0.95);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar.scrolled {
    padding: 16px 0;
    background: rgba(0, 0, 0, 0.98);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 48px;
}

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

.logo-icon {
    font-size: 32px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 20px rgba(168, 85, 247, 0.5));
}

.logo-text {
    font-size: 18px;
    font-weight: 400;
    letter-spacing: 2px;
    text-transform: uppercase;
    opacity: 0.9;
}

.nav-links {
    display: flex;
    gap: 56px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 0.3s ease;
    position: relative;
    padding: 4px 0;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.nav-links a:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 24px;
    position: relative;
    background: var(--gradient-hero);
}

.hero::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: var(--gradient-glow);
    pointer-events: none;
}

.hero-content {
    max-width: 1000px;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(56px, 10vw, 120px);
    font-weight: 300;
    line-height: 1;
    margin-bottom: 32px;
    letter-spacing: -4px;
}

.gradient-text {
    background: linear-gradient(135deg, #ffffff 0%, rgba(255, 255, 255, 0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title .gradient-text:nth-child(2) {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 12px;
    font-weight: 400;
    letter-spacing: 8px;
    text-transform: uppercase;
}

.hero-desc {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 56px;
    font-weight: 300;
    letter-spacing: 0.5px;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 40px;
    background: transparent;
    color: white;
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 0;
    font-size: 13px;
    font-weight: 400;
    letter-spacing: 2px;
    text-transform: uppercase;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}

.cta-button:hover {
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 20px 60px rgba(168, 85, 247, 0.3);
}

.cta-button:hover::before {
    opacity: 1;
}

.cta-button svg {
    transition: transform 0.3s ease;
}

.cta-button:hover svg {
    transform: translate(2px, -2px);
}

.scroll-indicator {
    position: absolute;
    bottom: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.mouse {
    width: 22px;
    height: 36px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 11px;
    position: relative;
}

.wheel {
    width: 2px;
    height: 6px;
    background: var(--accent-purple);
    border-radius: 1px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 18px; }
}

/* ===== 通用 Section 样式 ===== */
section {
    padding: 160px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-tag {
    display: inline-block;
    padding: 10px 20px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0;
    font-size: 10px;
    font-weight: 400;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.section-title {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 300;
    letter-spacing: -2px;
}

/* ===== 关于我们 ===== */
.about {
    background: linear-gradient(180deg, #000000 0%, var(--bg-secondary) 100%);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-intro {
    font-size: 32px;
    font-weight: 300;
    line-height: 1.6;
    margin-bottom: 32px;
    letter-spacing: -0.5px;
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 400;
}

.about-detail {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 64px;
    font-weight: 300;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 100px;
    margin-top: 80px;
    padding-top: 64px;
    border-top: 1px solid var(--border-color);
}

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

.stat-number {
    display: block;
    font-size: 64px;
    font-weight: 300;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -2px;
    line-height: 1;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 16px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* ===== 核心业务 ===== */
.services {
    background: var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.service-card {
    position: relative;
    padding: 64px 48px;
    background: var(--bg-primary);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(168, 85, 247, 0.05) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.service-card:hover {
    background: #080810;
}

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

.service-card.featured {
    background: linear-gradient(180deg, rgba(168, 85, 247, 0.08) 0%, var(--bg-primary) 100%);
}

.service-card.featured::before {
    opacity: 1;
    background: linear-gradient(180deg, rgba(168, 85, 247, 0.12) 0%, transparent 100%);
}

.card-badge {
    position: absolute;
    top: 32px;
    right: 32px;
    padding: 6px 14px;
    background: var(--gradient-primary);
    font-size: 9px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 32px;
    color: var(--accent-purple);
    opacity: 0.9;
}

.card-title {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.card-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
    font-weight: 300;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.card-tags span {
    padding: 8px 14px;
    background: transparent;
    border: 1px solid var(--border-color);
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

/* ===== 企业愿景 ===== */
.vision {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, #000000 100%);
    position: relative;
}

.vision::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.vision-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.vision-quote {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 200;
    line-height: 1.4;
    margin-bottom: 100px;
    letter-spacing: -1px;
}

.vision-quote br {
    display: block;
    content: "";
    margin-top: 8px;
}

.vision-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
    text-align: left;
}

.value-item {
    padding: 0;
    background: transparent;
    transition: all 0.3s ease;
}

.value-icon {
    font-size: 24px;
    margin-bottom: 24px;
    color: var(--accent-purple);
    opacity: 0.8;
}

.value-item h4 {
    font-size: 18px;
    font-weight: 400;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.value-item p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.9;
    font-weight: 300;
}

/* ===== 联系我们 ===== */
.contact {
    background: #000000;
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--border-color);
    border: 1px solid var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 32px 40px;
    background: var(--bg-primary);
    transition: all 0.3s ease;
}

.info-item:hover {
    background: #050508;
}

.info-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-purple);
    flex-shrink: 0;
    opacity: 0.8;
}

.info-text {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.info-label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.info-value {
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 300;
}

/* ===== 页脚 ===== */
.footer {
    padding: 48px 0;
    background: #000000;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0.6;
}

.footer-copyright {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.footer-copyright a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-copyright a:hover {
    color: var(--text-muted);
}

/* ===== 动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), transform 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

    .vision-values {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 20px;
        padding: 0 24px;
    }

    .nav-links {
        gap: 32px;
    }

    .hero-title {
        font-size: 48px;
        letter-spacing: -2px;
    }

    .about-stats {
        flex-direction: column;
        gap: 48px;
    }

    .service-card {
        padding: 48px 32px;
    }

    .cta-button {
        padding: 16px 32px;
    }
}

@media (max-width: 480px) {
    .nav-links {
        gap: 20px;
        font-size: 11px;
    }

    .hero-title {
        font-size: 36px;
        letter-spacing: -1px;
    }

    .hero-subtitle {
        letter-spacing: 4px;
        font-size: 12px;
    }

    .section-title {
        font-size: 32px;
    }

    .about-intro {
        font-size: 22px;
    }

    .stat-number {
        font-size: 48px;
    }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: #000000;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}