/* ===== CSS Variables - 科技感配色 ===== */
:root {
    --primary: #00f0ff;
    --primary-glow: rgba(0, 240, 255, 0.6);
    --secondary: #7c3aed;
    --secondary-glow: rgba(124, 58, 237, 0.6);
    --accent: #f472b6;
    --bg-dark: #0a0a1a;
    --bg-card: rgba(20, 20, 40, 0.8);
    --bg-card-hover: rgba(30, 30, 60, 0.9);
    --text: #ffffff;
    --text-muted: #8888aa;
    --border: rgba(255, 255, 255, 0.1);
    --border-glow: rgba(0, 240, 255, 0.4);
    --radius: 20px;
    --shadow-glow: 0 0 40px rgba(0, 240, 255, 0.3);
}

* {
    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-dark);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    font-weight: 400;
}

/* 背景 */
.bg-fixed {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(124, 58, 237, 0.25) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(0, 240, 255, 0.2) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(244, 114, 182, 0.1) 0%, transparent 50%),
        var(--bg-dark);
    animation: bgPulse 10s ease-in-out infinite;
}

@keyframes bgPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image:
        linear-gradient(rgba(0, 240, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

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

section {
    padding: 100px 0;
}

/* Nav */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 18px 0;
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 240, 255, 0.1);
    transition: all 0.4s;
}

.navbar:hover {
    background: rgba(10, 10, 26, 0.95);
    border-bottom-color: rgba(0, 240, 255, 0.3);
    box-shadow: 0 5px 30px rgba(0, 240, 255, 0.1);
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    justify-content: center;
    flex: 1;
    gap: 48px;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-links li {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    font-family: 'Noto Sans SC', sans-serif;
    letter-spacing: 0.02em;
    color: var(--text);
    text-decoration: none;
    transition: all 0.3s ease;
}

.logo:hover {
    filter: brightness(1.2);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    color: var(--bg-dark);
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    padding: 8px 16px;
    position: relative;
    transition: color 0.3s ease;
    white-space: nowrap;
    display: inline-block;
}

/* 导航链接悬停效果 - 简单的下划线 */
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
    box-shadow: 0 0 8px var(--primary);
}

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

.nav-links a:hover::after {
    width: 100%;
}

.btn {
    padding: 14px 28px;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--bg-dark);
    box-shadow:
        0 4px 20px rgba(0, 240, 255, 0.4),
        0 0 30px rgba(0, 240, 255, 0.2);
    border: none;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.6s;
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow:
        0 15px 50px rgba(0, 240, 255, 0.6),
        0 0 60px rgba(0, 240, 255, 0.4),
        0 0 100px rgba(124, 58, 237, 0.3);
}

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

/* 按钮点击波纹效果 */
.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:active::after {
    width: 400px;
    height: 400px;
}

/* Outline按钮 */
.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: rgba(0, 240, 255, 0.15);
    border-color: var(--primary);
    box-shadow:
        0 0 30px rgba(0, 240, 255, 0.4),
        inset 0 0 20px rgba(0, 240, 255, 0.1);
    transform: translateY(-3px);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 50px;
    font-size: 13px;
    color: var(--primary);
    margin-bottom: 24px;
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero h1 {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero h1 span {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

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

.btn-outline:hover {
    background: rgba(0, 240, 255, 0.1);
}

.hero-stats {
    display: flex;
    gap: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.hero-stat h4 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text);
}

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

/* Hero Image */
.hero-visual {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 500px;
    height: 400px;
    z-index: 0;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 24px;
    border: 1px solid rgba(0, 240, 255, 0.2);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

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

.section-tag {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 20px;
    letter-spacing: 0.1em;
}

.section-title {
    font-size: clamp(32px, 4vw, 44px);
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text) 0%, var(--primary) 50%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
    text-shadow: 0 0 40px rgba(0, 240, 255, 0.3);
    animation: titleGlow 3s ease-in-out infinite;
}

@keyframes titleGlow {
    0%, 100% {
        filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.3));
    }
    50% {
        filter: drop-shadow(0 0 35px rgba(124, 58, 237, 0.5));
    }
}

.section-title span {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.section-title span::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    background-size: 200% 100%;
    animation: gradientLine 3s linear infinite;
    opacity: 0.6;
}

@keyframes gradientLine {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

.section-desc {
    color: var(--text-muted);
    font-size: 18px;
    line-height: 1.7;
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
    font-size: 15px;
}

.about-feature-icon {
    width: 24px;
    height: 24px;
    background: rgba(0, 240, 255, 0.15);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 12px;
}

.about-feature-icon svg {
    stroke: var(--primary);
}

.about-img-wrap {
    position: relative;
}

.about-img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    border-radius: 24px;
    border: 1px solid var(--border);
}

.about-year {
    position: absolute;
    bottom: 24px;
    left: 24px;
    font-size: 48px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

/* 卡片顶部渐变条 */
.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
    background-size: 200% 100%;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 卡片光效 */
.service-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, rgba(124, 58, 237, 0.1) 50%, transparent 70%);
    opacity: 0;
    transition: opacity 0.5s;
    pointer-events: none;
    animation: cardGlow 3s ease-in-out infinite;
}

@keyframes cardGlow {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.service-card:hover {
    transform: translateY(-15px) scale(1.02);
    background: var(--bg-card-hover);
    border-color: var(--border-glow);
    box-shadow:
        0 25px 50px rgba(0, 0, 0, 0.4),
        0 0 60px rgba(0, 240, 255, 0.25),
        0 0 100px rgba(124, 58, 237, 0.15),
        inset 0 0 40px rgba(0, 240, 255, 0.08);
}

.service-card:hover::before {
    transform: scaleX(1);
    background-position: 100% 0;
    animation: gradientSlide 2s linear infinite;
}

@keyframes gradientSlide {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

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

.service-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(124, 58, 237, 0.15));
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.service-icon svg {
    stroke: var(--primary);
    transition: all 0.4s;
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.25), rgba(124, 58, 237, 0.25));
}

.service-card:hover .service-icon svg {
    stroke: var(--primary);
    filter: drop-shadow(0 0 8px var(--primary));
}

.service-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    transition: all 0.3s;
}

.service-card:hover h3 {
    color: var(--primary);
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
}

.service-card p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.7;
    transition: all 0.3s;
}

.service-card:hover p {
    color: var(--text);
}

/* Stats */
.stats {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.05), rgba(124, 58, 237, 0.05));
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-number {
    font-size: 56px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 40px rgba(0, 240, 255, 0.5);
    animation: statGlow 3s ease-in-out infinite;
}

@keyframes statGlow {
    0%, 100% { filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.5)); }
    50% { filter: drop-shadow(0 0 40px rgba(124, 58, 237, 0.6)); }
}

.stat-label {
    color: var(--text-muted);
    margin-top: 8px;
    font-size: 15px;
}

/* Contact */
.contact-card {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0.5;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3),
                0 0 30px rgba(0, 240, 255, 0.1);
    border-color: rgba(0, 240, 255, 0.3);
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 32px;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    font-size: 17px;
    padding: 12px 20px;
    border-radius: 12px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.03);
}

.contact-item:hover {
    background: rgba(0, 240, 255, 0.1);
    transform: scale(1.02);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(124, 58, 237, 0.2));
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    transition: all 0.3s ease;
}

.contact-item:hover .contact-icon {
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
    transform: scale(1.1);
}

.contact-icon svg {
    stroke: var(--primary);
}

.contact-msg {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 15px;
}

/* Footer */
.footer {
    padding: 32px 0;
    text-align: center;
    border-top: 1px solid var(--border);
}

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

.footer .icp {
    margin-top: 8px;
}

.footer .icp a {
    color: var(--text-muted);
    transition: color 0.3s;
}

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

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .hero-visual { display: none; }
    .about-grid { grid-template-columns: 1fr; }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-stats { flex-direction: column; gap: 20px; }
    .services-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
    .about-features { grid-template-columns: 1fr; }
    section { padding: 60px 0; }
}