/* ===================================
   CSS Variables & Reset
   =================================== */

:root {
    /* Colors */
    --color-gold: #D4AF37;
    --color-gold-light: #F4E4C1;
    --color-gold-dark: #B8941F;
    --color-teal: #006B7D;
    --color-teal-light: #008B9E;
    --color-black: #0A0A0A;
    --color-dark-gray: #1A1A1A;
    --color-gray: #2A2A2A;
    --color-light-gray: #E5E5E5;
    --color-white: #FFFFFF;
    
    /* Gradients */
    --gradient-dark: linear-gradient(135deg, #0A0A0A 0%, #1A3A4A 100%);
    --gradient-gold: linear-gradient(135deg, #D4AF37 0%, #F4E4C1 100%);
    --gradient-teal: linear-gradient(135deg, #006B7D 0%, #008B9E 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: 'Noto Sans SC', sans-serif;
    --font-secondary: 'Montserrat', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(212, 175, 55, 0.1);
    --shadow-md: 0 4px 16px rgba(212, 175, 55, 0.15);
    --shadow-lg: 0 8px 32px rgba(212, 175, 55, 0.2);
    --shadow-gold: 0 0 30px rgba(212, 175, 55, 0.5);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-black);
    color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-normal);
}

ul {
    list-style: none;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   Navigation
   =================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.1);
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-logo img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    filter: drop-shadow(0 0 10px rgba(212, 175, 55, 0.3));
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    font-size: 1rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: var(--transition-normal);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--color-gold);
    transition: var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

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

.nav-link.active {
    color: var(--color-gold);
}

.nav-cta {
    background: var(--gradient-gold);
    color: var(--color-black);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-gold);
    color: var(--color-black);
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-gold);
    border-radius: 2px;
    transition: var(--transition-normal);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(212, 175, 55, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(0, 107, 125, 0.1) 0%, transparent 50%);
    animation: particlesFloat 15s ease-in-out infinite;
}

@keyframes particlesFloat {
    0%, 100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-20px) scale(1.05); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-md);
    padding-top: 140px; /* 增加上边距，避免与导航栏重叠 */
}

.logo-animation {
    margin-bottom: var(--spacing-lg);
    animation: logoFloat 3s ease-in-out infinite;
}

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

.hero-logo {
    width: 180px;
    height: 180px;
    margin: 0 auto;
    filter: drop-shadow(0 0 30px rgba(212, 175, 55, 0.5));
    animation: logoGlow 2s ease-in-out infinite;
}

@keyframes logoGlow {
    0%, 100% { filter: drop-shadow(0 0 30px rgba(212, 175, 55, 0.5)); }
    50% { filter: drop-shadow(0 0 50px rgba(212, 175, 55, 0.8)); }
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 2px;
}

.hero-subtitle {
    margin-bottom: var(--spacing-sm);
}

.subtitle-en {
    font-family: var(--font-secondary);
    font-size: 1.2rem;
    font-weight: 300;
    letter-spacing: 8px;
    color: var(--color-gold-light);
    margin-bottom: 0.5rem;
}

.subtitle-zh {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 20px;
    color: var(--color-white);
    text-shadow: 0 0 20px rgba(212, 175, 55, 0.3);
}

.hero-description {
    font-size: 1.3rem;
    color: var(--color-light-gray);
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-indicator i {
    font-size: 2rem;
    color: var(--color-gold);
}

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

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-gold);
    color: var(--color-black);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-gold);
}

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

.btn-secondary:hover {
    background: var(--color-gold);
    color: var(--color-black);
}

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

.btn-outline:hover {
    background: var(--color-gold);
    color: var(--color-black);
}

.btn-lg {
    padding: 1.2rem 3rem;
    font-size: 1.1rem;
}

/* ===================================
   Mission Section
   =================================== */

.mission {
    padding: var(--spacing-xl) 0;
    background: var(--color-dark-gray);
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.mission-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-gray);
    border-radius: 15px;
    border: 1px solid rgba(212, 175, 55, 0.1);
    transition: var(--transition-normal);
}

.mission-item:hover {
    transform: translateY(-10px);
    border-color: var(--color-gold);
    box-shadow: var(--shadow-gold);
}

.mission-item i {
    font-size: 3rem;
    color: var(--color-gold);
    margin-bottom: var(--spacing-md);
}

.mission-item h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gold);
}

.mission-item p {
    font-size: 1.1rem;
    color: var(--color-light-gray);
    line-height: 1.8;
}

/* ===================================
   Section Headers
   =================================== */

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--color-light-gray);
    font-weight: 300;
}

/* ===================================
   Services Section
   =================================== */

.services {
    padding: var(--spacing-xl) 0;
    background: var(--color-black);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-dark-gray);
    padding: var(--spacing-lg);
    border-radius: 15px;
    border: 1px solid rgba(212, 175, 55, 0.1);
    transition: var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-gold);
    box-shadow: var(--shadow-gold);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.service-icon i {
    font-size: 2rem;
    color: var(--color-black);
}

.service-title {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gold);
}

.service-description {
    color: var(--color-light-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.service-list {
    margin-bottom: var(--spacing-md);
}

.service-list li {
    padding: 0.5rem 0;
    color: var(--color-light-gray);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.service-list i {
    color: var(--color-gold);
    font-size: 0.9rem;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-gold);
    font-weight: 600;
    transition: var(--transition-normal);
}

.service-link:hover {
    gap: var(--spacing-sm);
}

/* ===================================
   Lifecycle Section
   =================================== */

.lifecycle {
    padding: var(--spacing-xl) 0;
    background: var(--color-dark-gray);
}

.lifecycle-timeline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) 0;
}

.timeline-item {
    text-align: center;
    flex: 1;
    min-width: 150px;
}

.timeline-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    transition: var(--transition-normal);
}

.timeline-item:hover .timeline-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-gold);
}

.timeline-icon i {
    font-size: 2rem;
    color: var(--color-black);
}

.timeline-item h4 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--color-gold);
}

.timeline-item p {
    color: var(--color-light-gray);
    font-size: 0.9rem;
}

.timeline-connector {
    flex: 0 0 50px;
    height: 2px;
    background: linear-gradient(to right, var(--color-gold), var(--color-teal));
    position: relative;
}

.timeline-connector::after {
    content: '';
    position: absolute;
    right: -5px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid var(--color-teal);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
}

/* ===================================
   Intelligence Section
   =================================== */

.intelligence {
    padding: var(--spacing-xl) 0;
    background: var(--color-black);
}

.intelligence-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.intelligence-text h2 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.lead {
    font-size: 1.3rem;
    color: var(--color-light-gray);
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
}

.intelligence-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-dark-gray);
    border-radius: 10px;
    border: 1px solid rgba(212, 175, 55, 0.1);
    transition: var(--transition-normal);
}

.feature-item:hover {
    border-color: var(--color-gold);
    transform: translateX(10px);
}

.feature-item i {
    font-size: 2.5rem;
    color: var(--color-gold);
    flex-shrink: 0;
}

.feature-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--color-gold);
}

.feature-item p {
    color: var(--color-light-gray);
    font-size: 0.95rem;
}

.intelligence-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.brain-animation {
    width: 300px;
    height: 300px;
    background: var(--gradient-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: brainPulse 3s ease-in-out infinite;
    box-shadow: var(--shadow-gold);
}

@keyframes brainPulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 30px rgba(212, 175, 55, 0.5); }
    50% { transform: scale(1.05); box-shadow: 0 0 60px rgba(212, 175, 55, 0.8); }
}

.brain-animation i {
    font-size: 8rem;
    color: var(--color-black);
}

/* ===================================
   Partners Section
   =================================== */

.partners {
    padding: var(--spacing-xl) 0;
    background: var(--color-dark-gray);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.partner-item {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 150px;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.partner-item:hover {
    transform: translateY(-10px);
    border-color: var(--color-gold);
    box-shadow: var(--shadow-gold);
}

.partner-item img {
    max-width: 80%;
    max-height: 100px;
    object-fit: contain;
    filter: grayscale(100%);
    transition: var(--transition-normal);
}

.partner-item:hover img {
    filter: grayscale(0%);
}

.partners-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ===================================
   CTA Section
   =================================== */

.cta {
    padding: var(--spacing-xl) 0;
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
}

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

.cta-content h2 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    background: var(--gradient-gold);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cta-content p {
    font-size: 1.3rem;
    color: var(--color-light-gray);
    margin-bottom: var(--spacing-lg);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   Footer
   =================================== */

.footer {
    background: var(--color-dark-gray);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    border-top: 1px solid rgba(212, 175, 55, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-gold);
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-logo img {
    width: 60px;
    height: 60px;
    object-fit: contain;
}

.footer-logo h3 {
    font-size: 1.3rem;
    color: var(--color-gold);
}

.footer-logo p {
    font-size: 0.9rem;
    color: var(--color-light-gray);
}

.footer-description {
    color: var(--color-light-gray);
    margin-top: var(--spacing-sm);
    line-height: 1.8;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: var(--color-light-gray);
    transition: var(--transition-normal);
}

.footer-links a:hover {
    color: var(--color-gold);
    padding-left: 5px;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-contact li {
    color: var(--color-light-gray);
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.footer-contact i {
    color: var(--color-gold);
    margin-top: 3px;
    flex-shrink: 0;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(212, 175, 55, 0.1);
    color: var(--color-light-gray);
}

.footer-bottom p {
    margin: 0.5rem 0;
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--color-gold);
    transition: var(--transition-normal);
}

.footer-bottom a:hover {
    text-decoration: underline;
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
    .intelligence-content {
        grid-template-columns: 1fr;
    }
    
    .brain-animation {
        width: 250px;
        height: 250px;
    }
    
    .brain-animation i {
        font-size: 6rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(10, 10, 10, 0.98);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--spacing-lg);
        transition: var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .subtitle-en {
        font-size: 1rem;
        letter-spacing: 4px;
    }
    
    .subtitle-zh {
        font-size: 1.8rem;
        letter-spacing: 10px;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-logo {
        width: 120px;
        height: 120px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .lifecycle-timeline {
        flex-direction: column;
    }
    
    .timeline-connector {
        width: 2px;
        height: 50px;
        flex: none;
    }
    
    .timeline-connector::after {
        left: 50%;
        bottom: -5px;
        top: auto;
        transform: translateX(-50%) rotate(90deg);
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .cta-content h2 {
        font-size: 2rem;
    }
    
    .cta-content p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .hero {
        height: auto;
        min-height: 100vh;
        padding: 120px 0 60px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .mission-grid {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}