/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
    background-color: #f8fafc;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a365d;
}



.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #2d3748;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #3182ce;
    transition: width 0.3s ease;
}

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

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

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主横幅区域 */
.hero {
    height: calc(100vh - 280px);
    margin: 80px auto 60px auto;
    max-width: 1200px;
    padding: 0 20px;
    border-radius: 12px;
    background: linear-gradient(rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05)),
                url('../images/coastal-background-updated.jpg') center/cover no-repeat;
    filter: brightness(1.2) contrast(1.1);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    color: white;
    text-align: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26, 54, 93, 0.8), rgba(49, 130, 206, 0.6));
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.highlight {
    color: #63b3ed;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-primary {
    background: #3182ce;
    color: white;
    border-color: #3182ce;
}

.btn-primary:hover {
    background: #2c5282;
    border-color: #2c5282;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(49, 130, 206, 0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

.btn-secondary:hover {
    background: white;
    color: #3182ce;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

/* 区段样式 */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #1a365d;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #718096;
    max-width: 600px;
    margin: 0 auto;
}

/* 关于我们 */
.about {
    background: #f8fafc;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h3 {
    font-size: 1.5rem;
    color: #1a365d;
    margin-bottom: 1rem;
    margin-top: 2rem;
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    color: #4a5568;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.advantages-list {
    list-style: none;
    padding: 0;
}

.advantages-list li {
    display: flex;
    align-items: center;
    margin-bottom: 0.8rem;
    color: #4a5568;
}

.advantages-list i {
    color: #38a169;
    margin-right: 0.8rem;
    font-size: 1.1rem;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.stat-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #3182ce;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #718096;
    font-weight: 500;
}







/* 联系表单 */
.contact-form-container {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 12px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group input,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background: white;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3182ce;
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 页脚 */
.footer {
    color: #4a5568;
    padding: 2rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: flex-start;
    margin-bottom: 2rem;
}





.footer-description {
    color: #a0aec0;
    line-height: 1.6;
}



.footer-contact p {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
    color: #4a5568;
}

.footer-contact i {
    margin-right: 0.5rem;
    color: #3182ce;
}





/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 1rem 0;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero {
        margin: 50px auto 40px auto;
        max-width: 1200px;
        padding: 0 20px;
        height: calc(100vh - 200px);
        border-radius: 8px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-description {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }





    .footer-content {
        justify-content: flex-start;
    }

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

    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .nav-container {
        padding: 0 15px;
    }

    .hero {
        margin: 40px auto 30px auto;
        max-width: 1200px;
        padding: 0 15px;
        height: calc(100vh - 180px);
        border-radius: 6px;
    }

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

    .hero-description {
        font-size: 1rem;
    }

    .btn {
        padding: 10px 24px;
        font-size: 0.9rem;
    }



    .contact-form-container {
        padding: 1.5rem;
    }
}