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

:root {
    --primary-color: #0066ff;
    --secondary-color: #00d4ff;
    --accent-color: #7c3aed;
    --dark-bg: #0a0e27;
    --darker-bg: #06091a;
    --card-bg: #12183a;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --gradient-1: linear-gradient(135deg, #0066ff 0%, #00d4ff 100%);
    --gradient-2: linear-gradient(135deg, #7c3aed 0%, #0066ff 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

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

.navbar {
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    background: var(--gradient-1);
    padding: 8px 12px;
    border-radius: 8px;
    font-weight: 900;
    font-size: 1rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--text-primary);
}

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

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(0, 102, 255, 0.15) 0%, transparent 70%);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--secondary-color);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 15s infinite;
}

.particle:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; }
.particle:nth-child(2) { top: 40%; left: 80%; animation-delay: -3s; }
.particle:nth-child(3) { top: 60%; left: 30%; animation-delay: -6s; }
.particle:nth-child(4) { top: 80%; left: 70%; animation-delay: -9s; }
.particle:nth-child(5) { top: 30%; left: 50%; animation-delay: -12s; }

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); opacity: 0.6; }
    50% { transform: translateY(-30px) rotate(180deg); opacity: 1; }
}

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

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

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

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn {
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 102, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.btn-full {
    width: 100%;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.section {
    padding: 100px 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
}

.more-link {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 102, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 102, 255, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.feature-icon svg {
    width: 40px;
    height: 40px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-secondary);
}

.announcements-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.announcement-item {
    background: var(--card-bg);
    padding: 25px 30px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 30px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s;
}

.announcement-item:hover {
    border-color: rgba(0, 102, 255, 0.3);
}

.announcement-date {
    color: var(--text-secondary);
    white-space: nowrap;
    font-size: 0.9rem;
}

.announcement-content h4 {
    font-size: 1.1rem;
}

.products-grid,
.products-page-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.product-card,
.product-card-large {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all 0.3s;
    text-decoration: none;
    color: inherit;
    display: block;
}

.product-card:hover,
.product-card-large:hover {
    transform: translateY(-10px);
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: 0 15px 50px rgba(102, 126, 234, 0.2);
}

.product-image,
.product-card-image {
    height: 200px;
    background: var(--darker-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image img,
.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-placeholder,
.product-placeholder-large {
    width: 80px;
    height: 80px;
    opacity: 0.3;
}

.product-placeholder svg,
.product-placeholder-large svg {
    width: 100%;
    height: 100%;
}

.product-info,
.product-card-info {
    padding: 25px;
}

.product-category,
.product-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 102, 255, 0.2);
    color: var(--secondary-color);
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 15px;
}

.product-info h3,
.product-card-info h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.product-info p,
.product-card-info p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.product-card-footer {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.product-card-footer .read-more {
    color: #667eea;
    font-weight: 500;
    transition: all 0.3s;
}

.product-card-large:hover .read-more {
    color: #764ba2;
}

.page-header {
    background: var(--darker-bg);
    padding: 80px 0;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-top: 10px;
}

.announcements-page-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.announcement-card {
    background: var(--card-bg);
    padding: 35px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-decoration: none;
    color: inherit;
    transition: all 0.3s;
    display: block;
}

.announcement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.2);
    border-color: rgba(102, 126, 234, 0.3);
}

.announcement-card-header {
    margin-bottom: 15px;
}

.announcement-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.announcement-card-content {
    color: var(--text-secondary);
    line-height: 1.8;
}

.announcement-card-footer {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.read-more {
    color: #667eea;
    font-weight: 500;
    transition: all 0.3s;
}

.announcement-card:hover .read-more {
    color: #764ba2;
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h2,
.contact-form-wrapper h2 {
    font-size: 2rem;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    align-items: flex-start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-item h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-form {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 16px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 18px;
    background: var(--darker-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.success-message {
    text-align: center;
    padding: 60px 40px;
    background: var(--card-bg);
    border-radius: 16px;
}

.success-message svg {
    width: 80px;
    height: 80px;
    color: #10b981;
    margin-bottom: 20px;
}

.success-message h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.success-message p {
    color: var(--text-secondary);
}

.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 100px;
    height: 100px;
    margin-bottom: 20px;
    opacity: 0.3;
}

/* 表单样式 */
.required {
    color: #e74c3c;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.5;
}

.contact-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

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

.btn-full {
    width: 100%;
    padding: 14px;
    font-size: 1.1rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }

    .page-subtitle {
        font-size: 1rem;
    }

    .contact-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .products-page-grid {
        grid-template-columns: 1fr;
    }
}

.empty-text {
    color: var(--text-secondary);
    text-align: center;
}

.footer {
    background: var(--darker-bg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 40px 0;
    text-align: center;
}

.footer-bottom {
    text-align: center;
    border-top: none;
    padding-top: 0;
    color: var(--text-secondary);
}

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

.text-truncate {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}