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

:root {
    --primary-color: #002FA7;
    --primary-dark: #002591;
    --secondary-color: #0047CC;
    --bg-dark: #001a5c;
    --bg-darker: #001245;
    --bg-light: #e8edf7;
    --text-white: #ffffff;
    --text-gray: #a0b4e0;
    --text-dark: #001a5c;
    --text-muted: #6680c4;
    --gradient-primary: linear-gradient(135deg, #002FA7 0%, #0039c7 100%);
    --gradient-dark: linear-gradient(135deg, #001a5c 0%, #002FA7 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 47, 167, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 47, 167, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 47, 167, 0.15);
    --shadow-xl: 0 20px 25px -5px rgba(0, 47, 167, 0.2);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 47, 167, 0.95);
    backdrop-filter: blur(10px);
    padding: 16px 0;
    box-shadow: var(--shadow-md);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-white);
    font-size: 1.5rem;
    font-weight: 700;
}

.brand-logo {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.footer .brand-logo {
    height: 80px;
}

.brand-icon {
    color: var(--primary-color);
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

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

.nav-toggle {
    display: none;
    color: var(--text-white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* 首页 Banner */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--bg-darker);
    padding-top: 80px;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
}

.hero-section .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 32px;
    line-height: 1.8;
}

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

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

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
    text-align: center;
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.visual-eye {
    position: relative;
    width: 300px;
    height: 300px;
}

.eye-sclera {
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
    border-radius: 50%;
    border: 3px solid var(--primary-color);
    box-shadow: 0 0 30px rgba(0, 47, 167, 0.3), inset 0 0 30px rgba(0, 47, 167, 0.1);
    overflow: hidden;
}

.eye-iris {
    position: absolute;
    width: 120px;
    height: 120px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--gradient-primary);
    border-radius: 50%;
    box-shadow: 0 0 20px rgba(0, 47, 167, 0.5);
    animation: irisGlow 3s ease-in-out infinite;
}

.eye-pupil {
    position: absolute;
    width: 50px;
    height: 50px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #000;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(0, 47, 167, 0.8);
}

.eyelid {
    position: absolute;
    width: 100%;
    height: 50%;
    left: 0;
    background: var(--bg-darker);
    z-index: 10;
    transition: height 0.1s ease-out;
}

.eyelid-top {
    top: 0;
    height: 0%;
    transform-origin: top;
    animation: blink 4s ease-in-out infinite;
}

.eyelid-bottom {
    bottom: 0;
    height: 0%;
    transform-origin: bottom;
    animation: blink 4s ease-in-out infinite;
}

.visual-circle {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0.2;
    animation: pulse 4s ease-in-out infinite;
}

.visual-ring {
    position: absolute;
    width: 500px;
    height: 500px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    opacity: 0.3;
    animation: rotate 20s linear infinite;
}

.visual-particle {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--secondary-color);
    border-radius: 50%;
    animation: float 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes blink {
    0%, 45%, 55%, 100% {
        height: 0%;
    }
    50% {
        height: 50%;
    }
}

@keyframes irisGlow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 47, 167, 0.5);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 47, 167, 0.8);
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) translateX(0);
    }
    50% {
        transform: translateY(-20px) translateX(10px);
    }
}

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

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
}

/* 产品中心 */
.products-section {
    background: var(--bg-light);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.product-card {
    background: var(--text-white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-image {
    height: 200px;
    background: var(--gradient-dark);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-placeholder {
    color: var(--text-white);
    font-size: 1.5rem;
    font-weight: 700;
}

.product-info {
    padding: 24px;
}

.product-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.product-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 16px;
    line-height: 1.6;
}

.product-specs {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.spec-item {
    background: var(--bg-light);
    color: var(--primary-color);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.product-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.3s ease;
}

.product-link:hover {
    gap: 8px;
}

/* 解决方案 */
.solutions-section {
    background: var(--bg-dark);
}

.solutions-section .section-title {
    color: var(--text-white);
}

.solutions-section .section-subtitle {
    color: var(--text-gray);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.solution-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 40px 32px;
    transition: all 0.3s ease;
}

.solution-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-4px);
    border-color: var(--primary-color);
}

.solution-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.solution-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 12px;
}

.solution-desc {
    color: var(--text-gray);
    margin-bottom: 20px;
    line-height: 1.7;
}

.solution-features {
    list-style: none;
    margin-bottom: 24px;
}

.solution-features li {
    color: var(--text-gray);
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
}

.solution-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.solution-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.3s ease;
}

.solution-link:hover {
    gap: 8px;
}

/* 应用案例 */
.cases-section {
    background: var(--bg-light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.case-card {
    background: var(--text-white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    height: 180px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-placeholder {
    color: var(--text-white);
    font-size: 1.25rem;
    font-weight: 700;
}

.case-info {
    padding: 24px;
}

.case-category {
    display: inline-block;
    background: var(--primary-color);
    color: var(--text-white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.case-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.case-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* 新闻动态 */
.news-section {
    background: var(--text-white);
}

.news-grid {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 800px;
}

.news-item {
    border-left: 4px solid var(--primary-color);
    padding-left: 24px;
    transition: all 0.3s ease;
}

.news-item:hover {
    border-left-color: var(--primary-dark);
}

.news-date {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.news-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
    line-height: 1.5;
}

.news-desc {
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.6;
}

.news-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: gap 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.news-link:hover {
    gap: 8px;
}

/* 联系我们 */
.contact-section {
    background: var(--bg-dark);
}

.contact-section .section-title {
    color: var(--text-white);
}

.contact-section .section-subtitle {
    color: var(--text-gray);
}

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

.contact-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 12px;
}

.contact-subtitle {
    color: var(--text-gray);
    margin-bottom: 32px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-gray);
    font-size: 1.1rem;
}

.contact-icon {
    font-size: 1.5rem;
}

.contact-form {
    background: rgba(255, 255, 255, 0.05);
    padding: 40px;
    border-radius: 16px;
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-white);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-gray);
}

/* 页脚 */
.footer {
    background: var(--bg-darker);
    padding: 60px 0 30px;
}

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

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-brand .brand-name {
    color: var(--text-white);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.footer-link-group h4 {
    color: var(--text-white);
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-link-group a {
    display: block;
    color: var(--text-gray);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-dark);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .hero-section .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        margin-bottom: 40px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-title {
        font-size: 2rem;
    }

    .visual-circle {
        width: 300px;
        height: 300px;
    }

    .visual-ring {
        width: 350px;
        height: 350px;
    }

    .section-title {
        font-size: 2rem;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .section-title {
        font-size: 1.75rem;
    }
}