/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #00d4ff;
    --secondary-color: #5b8def;
    --accent-color: #7b2ff7;
    --bg-dark: #0a0e27;
    --bg-darker: #050816;
    --bg-card: #0f1739;
    --text-primary: #ffffff;
    --text-secondary: #a8b2d1;
    --gradient-1: linear-gradient(135deg, #00d4ff 0%, #5b8def 50%, #7b2ff7 100%);
    --gradient-2: linear-gradient(135deg, #7b2ff7 0%, #00d4ff 100%);
    --glow-primary: 0 0 20px rgba(0, 212, 255, 0.5);
    --glow-secondary: 0 0 30px rgba(123, 47, 247, 0.4);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-darker);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* 背景装饰 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(123, 47, 247, 0.15) 0%, transparent 50%);
    z-index: -1;
    pointer-events: none;
}

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

/* 通用渐变文字 */
.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 14, 39, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 14, 39, 0.95);
    box-shadow: 0 4px 30px rgba(0, 212, 255, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: bold;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--glow-primary);
    animation: pulse 2s ease-in-out infinite;
}

.logo-icon i {
    color: white;
    font-size: 1.2rem;
}

.logo-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    transition: color 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s;
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 100px 20px 50px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

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

.particle {
    position: absolute;
    background: var(--primary-color);
    border-radius: 50%;
    pointer-events: none;
    animation: float 6s ease-in-out infinite;
    box-shadow: 0 0 10px var(--primary-color);
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
    opacity: 0.5;
}

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

.hero-content {
    text-align: center;
    max-width: 900px;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--primary-color);
    margin-bottom: 30px;
    animation: fadeInUp 0.8s ease;
}

.hero-badge i {
    animation: rotate 3s linear infinite;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 25px;
    animation: fadeInUp 1s ease;
}

.subtitle {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--text-secondary);
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
    animation: fadeInUp 1.2s ease;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
    animation: fadeInUp 1.4s ease;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: var(--glow-primary);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(0, 212, 255, 0.5);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 600px;
    margin: 0 auto;
    animation: fadeInUp 1.6s ease;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: rgba(15, 23, 57, 0.5);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: all 0.3s;
}

.stat-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.2);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.stat-number small {
    font-size: 0.9rem;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    animation: bounce 2s infinite;
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--primary-color);
    border-radius: 15px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: wheel 1.5s infinite;
}

@keyframes wheel {
    0% { opacity: 1; top: 8px; }
    100% { opacity: 0; top: 20px; }
}

/* Section通用 */
section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-tag {
    display: inline-block;
    padding: 5px 15px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    color: var(--primary-color);
    font-size: 0.8rem;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* About Section */
.about {
    background: var(--bg-dark);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-top: 30px;
}

.info-card {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--bg-card);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 12px;
    transition: all 0.3s;
}

.info-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0, 212, 255, 0.15);
}

.info-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.info-icon i {
    color: white;
    font-size: 1rem;
}

.info-content {
    flex: 1;
    min-width: 0;
}

.info-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 3px;
}

.info-value {
    font-size: 0.85rem;
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-all;
}

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s;
}

.image-wrapper:hover img {
    transform: scale(1.05);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(123, 47, 247, 0.2) 100%);
    pointer-events: none;
}

.floating-card {
    position: absolute;
    background: rgba(10, 14, 39, 0.95);
    border: 1px solid var(--primary-color);
    border-radius: 12px;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    backdrop-filter: blur(10px);
    box-shadow: var(--glow-primary);
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    color: var(--primary-color);
}

.card-1 {
    top: 10%;
    left: -30px;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: -30px;
    animation-delay: 1s;
}

.card-3 {
    bottom: 10%;
    left: -20px;
    animation-delay: 2s;
}

/* Services Section */
.services {
    background: var(--bg-darker);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 20px;
    padding: 0;
    transition: all 0.4s;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
}

.service-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.service-card:hover .service-image img {
    transform: scale(1.1);
}

.service-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 57, 0.9) 100%);
}

.service-icon {
    position: absolute;
    top: 150px;
    right: 20px;
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--glow-primary);
    z-index: 2;
}

.service-icon i {
    color: white;
    font-size: 1.5rem;
}

.service-card h3 {
    font-size: 1.4rem;
    margin: 30px 30px 15px;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    margin: 0 30px 20px;
    line-height: 1.7;
    font-size: 0.95rem;
}

.service-features {
    list-style: none;
    padding: 0 30px 30px;
}

.service-features li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 5px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.service-features i {
    color: var(--primary-color);
    font-size: 0.8rem;
}

/* Tech Section */
.tech {
    background: var(--bg-dark);
}

.tech-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 60px;
}

.tech-visual {
    position: relative;
}

.tech-image-container {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.tech-image-container img {
    width: 100%;
    height: auto;
    display: block;
}

.tech-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    pointer-events: none;
}

.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px solid rgba(0, 212, 255, 0.5);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: rotate 10s linear infinite;
}

.orbit::before {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    background: var(--primary-color);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--primary-color);
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
}

.orbit-1 {
    width: 200px;
    height: 200px;
}

.orbit-2 {
    width: 150px;
    height: 150px;
    animation-duration: 8s;
    animation-direction: reverse;
}

.orbit-3 {
    width: 100px;
    height: 100px;
    animation-duration: 6s;
}

.tech-skills {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.skill-item {
    transition: all 0.3s;
}

.skill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.skill-name {
    color: var(--text-primary);
    font-weight: 500;
}

.skill-percentage {
    color: var(--primary-color);
    font-weight: 600;
}

.skill-bar {
    width: 100%;
    height: 8px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-1);
    border-radius: 10px;
    width: 0;
    transition: width 1.5s ease;
    position: relative;
    overflow: hidden;
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shine 2s infinite;
}

@keyframes shine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.tech-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
}

.tech-feature {
    text-align: center;
    padding: 30px 20px;
    background: var(--bg-card);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 15px;
    transition: all 0.3s;
}

.tech-feature:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.15);
}

.tech-feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: var(--glow-primary);
}

.tech-feature-icon i {
    color: white;
    font-size: 1.5rem;
}

.tech-feature h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.tech-feature p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Contact Section */
.contact {
    background: var(--bg-darker);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
    align-items: start;
}

.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-card {
    padding: 25px;
    background: var(--bg-card);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 15px;
    transition: all 0.3s;
    text-align: center;
}

.contact-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.15);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    box-shadow: var(--glow-primary);
}

.contact-icon i {
    color: white;
    font-size: 1.2rem;
}

.contact-card h4 {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.contact-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    word-break: break-all;
}

.contact-card p a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 0.5px;
    transition: color 0.3s;
}

.contact-card p a:hover {
    color: #00ff88;
    text-decoration: underline;
}

.contact-form-wrapper {
    background: var(--bg-card);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 20px;
    padding: 40px;
    position: relative;
    overflow: hidden;
}

.contact-form-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.2) 0%, transparent 70%);
    pointer-events: none;
}

.contact-form h3 {
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--text-primary);
    position: relative;
}

.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(10, 14, 39, 0.6);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
    background: rgba(10, 14, 39, 0.8);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    cursor: pointer;
}

.form-group select option {
    background: var(--bg-darker);
    color: var(--text-primary);
}

/* Footer */
.footer {
    background: var(--bg-dark);
    padding: 60px 0 20px;
    border-top: 1px solid rgba(0, 212, 255, 0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin: 15px 0 20px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: bold;
}

.footer-logo .logo-icon {
    width: 35px;
    height: 35px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s;
}

.social-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--glow-primary);
}

.footer-col h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--gradient-1);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a,
.footer-col ul li {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-col ul li a:hover {
    color: var(--primary-color);
}

.footer-col ul li i {
    color: var(--primary-color);
    font-size: 0.85rem;
}

.footer-col ul li a[href^="tel:"] {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-col ul li a[href^="tel:"]:hover {
    color: #00ff88;
    text-decoration: underline;
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid rgba(0, 212, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* 动画 */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.5); }
    50% { box-shadow: 0 0 30px rgba(0, 212, 255, 0.8); }
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* 响应式 */
@media (max-width: 1024px) {
    .about-grid,
    .tech-content,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        max-width: 300px;
    }
    
    .info-cards {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .floating-card {
        display: none;
    }
    
    section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .contact-form-wrapper {
        padding: 25px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 15px 30px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        justify-content: center;
    }
    
    .container {
        padding: 0 15px;
    }
}

/* ===== 系统演示板块（新增） ===== */
.systems {
    background: var(--bg-dark);
}

.systems-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 26px;
}

.system-card {
    flex: 0 1 272px;
    max-width: 272px;
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 16px;
    overflow: hidden;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.35s ease;
}

.system-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: 0 18px 40px rgba(0, 212, 255, 0.2);
}

.system-preview {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    min-height: 150px;
    overflow: hidden;
    background: var(--bg-darker);
    border-bottom: 1px solid rgba(0, 212, 255, 0.12);
}

.system-preview img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.5s ease;
}

.system-card:hover .system-preview img {
    transform: scale(1.06);
}

.system-code {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 3px 9px;
    border-radius: 6px;
    background: rgba(5, 8, 22, 0.78);
    border: 1px solid rgba(0, 212, 255, 0.35);
    color: var(--primary-color);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 1px;
    line-height: 1.5;
}

.system-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 18px 20px 20px;
}

.system-body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.system-body h3 span {
    display: block;
    margin-top: 4px;
    font-size: 0.72rem;
    font-weight: 400;
    letter-spacing: 1px;
    color: var(--primary-color);
}

.system-body p {
    flex: 1;
    margin-bottom: 14px;
    font-size: 0.84rem;
    line-height: 1.65;
    color: var(--text-secondary);
}

.system-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--primary-color);
}

.system-more i {
    transition: transform 0.3s ease;
}

.system-card:hover .system-more i {
    transform: translateX(4px);
}

.systems-note {
    margin-top: 44px;
    text-align: center;
    font-size: 0.85rem;
    line-height: 1.9;
    color: var(--text-secondary);
    opacity: 0.85;
}

@media (max-width: 1024px) {
    .system-card {
        flex: 0 1 296px;
        max-width: 296px;
    }
}

@media (max-width: 768px) {
    .systems-grid {
        gap: 20px;
    }

    .system-card {
        flex: 0 1 320px;
        max-width: 320px;
    }

    .systems-note {
        margin-top: 32px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .system-card {
        flex: 1 1 100%;
        max-width: 100%;
    }
}

/* ===== 霁航 logo 图形（导航栏 / 页脚共用）===== */
.logo-icon {
    background: #FFFFFF;
    box-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
    overflow: hidden;
    padding: 3px;
}
.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* ===== 备案号（页脚底部） ===== */
.footer-bottom p.beian {
    margin-top: 8px;
}
.footer-bottom p.beian a {
    color: var(--text-secondary); text-decoration: none; transition: color 0.3s;
    white-space: nowrap; display: inline-flex; align-items: center;
}
.footer-bottom p.beian a:hover {
    color: var(--primary-color);
}
.footer-bottom p.beian .beian-sep {
    margin: 0 10px;
    color: var(--text-secondary);
}
.footer-bottom p.beian .ghs-icon {
    width: 13px;
    height: 14px;
    margin: 0;
    vertical-align: middle;
    display: inline-block;
}

/* qk-v2 r3 快速了解板块（霁航深色版；内联旧块已删，本块全权接管 2026-09-21） */
.ai-answer{padding:56px 20px;background:var(--bg-darker,#050816)}
.ai-answer .ai-inner{max-width:960px;margin:0 auto}
.ai-answer h2{text-align:center;font-size:2rem;font-weight:800;margin:0 0 24px}
.ai-answer .qk-lead{font-size:1.15rem;line-height:1.9;color:var(--text-primary);max-width:820px;margin:0 auto 20px;text-align:center}
.ai-answer .qk-lead strong{color:var(--primary-color)}
.qk-chips{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin:0 auto 28px;max-width:920px}
.qk-chip{flex:1 1 200px;max-width:280px;background:var(--bg-card);border:1px solid rgba(0,212,255,.25);border-radius:12px;padding:12px 16px;font-size:.9rem;color:var(--text-secondary);line-height:1.6;box-sizing:border-box}
.qk-chip b{display:block;color:var(--primary-color);font-size:1rem;margin-bottom:4px}
.ai-answer .qk-qa{display:block;max-width:860px;margin:0 auto 30px;text-align:left}
.ai-answer .qk-qa dt{font-weight:700;color:var(--text-primary);font-size:1.05rem;margin:20px 0 8px;padding-left:12px;border-left:3px solid var(--primary-color);line-height:1.5}
.ai-answer .qk-qa dd{margin:0;color:var(--text-secondary);line-height:1.9}
.ai-answer .qk-qa dd strong{color:var(--primary-color)}
.ai-table{width:100%;max-width:900px;margin:0 auto 10px;border-collapse:collapse;font-size:.92rem}
.ai-table th,.ai-table td{border:1px solid rgba(168,178,209,.25);padding:9px 12px;text-align:left;color:var(--text-secondary);line-height:1.6}
.ai-table th{background:rgba(0,212,255,.12);color:var(--text-primary);white-space:nowrap}
.ai-table tr:nth-child(even) td{background:rgba(255,255,255,.03)}
.ai-table a{color:var(--primary-color);text-decoration:none}
.ai-answer .qk-reg{font-size:.85rem;color:var(--text-secondary);opacity:.8;max-width:900px;margin:18px auto 0;line-height:1.8;text-align:left}
.ai-answer .ai-note{font-size:.85rem;color:var(--text-secondary);opacity:.8;max-width:900px;margin:10px auto 0;line-height:1.8;text-align:left}
.ai-answer .ai-note a{color:var(--primary-color)}
@media (max-width:640px){
  .ai-answer{padding:40px 16px}
  .ai-answer .qk-lead{font-size:1.02rem;text-align:left}
  .qk-chip{flex:1 1 45%;max-width:none}
  .ai-table{font-size:.82rem}
  .ai-table th,.ai-table td{padding:7px 8px}
}