@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&family=Montserrat:wght@700;900&display=swap');

:root {
    --primary-color: #001a33;
    --secondary-color: #00c853;
    --accent-color: #00e5ff;
    --text-color: #1a1a1a;
    --light-text: #666;
    --light-bg: #f4f7f6;
    --white: #ffffff;
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    --header-height: 140px;
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 40px;
}

/* Header & Nav */
header {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
    transition: var(--transition);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 100px;
    width: auto;
    max-width: 300px;
    object-fit: contain;
    display: block;
    transition: var(--transition);
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 50px;
}

.nav-links a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    transition: var(--transition);
}

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

.nav-links a:hover, .nav-links a.active {
    color: var(--secondary-color);
}

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 26, 51, 0.5), rgba(0, 26, 51, 0.5)), url('../assets/images/hero-bg.jpg') no-repeat center center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    padding-top: var(--header-height);
}

.hero-content {
    max-width: 1000px;
    animation: fadeInUp 1.2s ease;
}

.hero-content h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 5.5rem;
    margin-bottom: 30px;
    font-weight: 900;
    letter-spacing: -2px;
    line-height: 1;
    text-transform: uppercase;
}

.hero-content p {
    font-size: 1.6rem;
    margin-bottom: 50px;
    font-weight: 300;
    opacity: 0.9;
    letter-spacing: 0.5px;
}

.btn {
    display: inline-block;
    padding: 20px 50px;
    background-color: var(--secondary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 0;
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: var(--transition);
    border: none;
}

.btn:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--white);
    margin-left: 20px;
}

.btn-outline:hover {
    background-color: var(--white);
    color: var(--primary-color);
}

/* Sections */
section {
    padding: 150px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 100px;
}

.section-title h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 3.5rem;
    color: var(--primary-color);
    margin-bottom: 25px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -1px;
}

.section-title p {
    color: var(--light-text);
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.3rem;
    font-weight: 300;
}

/* Stats Section */
.stats {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 120px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 4rem;
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-weight: 900;
}

.stat-item p {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0.7;
}

/* Grid & Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 60px;
}

.card {
    background: var(--white);
    padding: 60px 50px;
    border: 1px solid #eee;
    transition: var(--transition);
    text-align: left;
}

.card:hover {
    transform: translateY(-15px);
    box-shadow: 0 30px 60px rgba(0,0,0,0.08);
    border-color: var(--secondary-color);
}

.card h3 {
    font-family: 'Montserrat', sans-serif;
    margin-bottom: 25px;
    color: var(--primary-color);
    font-size: 1.8rem;
    text-transform: uppercase;
}

.card p {
    color: var(--light-text);
    font-size: 1.1rem;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 120px 0 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1.5fr;
    gap: 80px;
    margin-bottom: 80px;
    align-items: start;
}

.footer-info p {
    color: rgba(255,255,255,0.6);
    font-size: 1.1rem;
    max-width: 450px;
}

.footer-links h4, .footer-contact h4, .footer-title {
    margin-bottom: 35px;
    font-size: 1.2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--white);
}

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

.footer-links li {
    margin-bottom: 20px;
}

.footer-links a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: var(--transition);
    font-size: 1rem;
}

.footer-links a:hover {
    color: var(--secondary-color);
    padding-left: 10px;
}

.footer-contact p {
    color: rgba(255,255,255,0.6);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-contact a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
}

.footer-brand-container {
    margin-top: 30px;
    display: block; /* 强制块级显示，防止 flex 溢出 */
    max-width: 250px; /* 强制限制容器宽度 */
    overflow: hidden;
}

.footer-logo-new {
    height: 50px; /* 极致缩小高度，适应右侧栏布局 */
    width: auto;
    max-width: 100%; /* 确保图片不会超出容器 */
    object-fit: contain;
    display: block;
    transition: var(--transition);
    opacity: 0.9;
}

.footer-logo-new:hover {
    transform: scale(1.05);
    opacity: 1;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 40px;
    text-align: center;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.4);
    letter-spacing: 1px;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 1200px) {
    .hero-content h1 {
        font-size: 4rem;
    }
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 60px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 100px;
    }
    .logo img {
        height: 70px;
    }
    .nav-links {
        display: none;
    }
    .hero-content h1 {
        font-size: 3rem;
    }
    .footer-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    .section-title h2 {
        font-size: 2.5rem;
    }
    .footer-brand-container {
        margin: 30px auto 0;
        text-align: center;
    }
    .footer-logo-new {
        margin: 0 auto;
    }
}