/* Google Fonts - Poppins */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* 全局样式 */
:root {
    --primary-color: #1a5f7a;
    --secondary-color: #159895;
    --accent-color: #57c5b6;
    --dark-color: #002B5B;
    --light-color: #f8f9fa;
    --text-color: #333;
    --text-light: #666;
    --white: #fff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

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

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

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

/* 导航栏 */
.navbar {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-img {
    width: 50px;
    height: 50px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo .brand-en {
    color: var(--primary-color);
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    letter-spacing: 3px;
    font-size: 1.4rem;
    line-height: 1.2;
}

.logo .slogan {
    font-size: 0.65rem;
    color: var(--text-light);
    font-family: 'Poppins', sans-serif;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

.mobile-menu {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 首页横幅 */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, rgba(0,43,91,0.7) 0%, rgba(26,95,122,0.6) 100%), url('../images/hero-ship.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    padding-top: 60px;
}

.hero-content {
    max-width: 800px;
    padding: 20px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.hero-slogan {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--accent-color);
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-desc {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 核心优势 */
.features {
    padding: 80px 0;
    background-color: var(--light-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background-color: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--dark-color);
}

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

/* 主要服务预览 */
.services-preview {
    padding: 80px 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-card {
    background-color: var(--white);
    padding: 0;
    border-radius: 10px;
    text-align: center;
    border: 2px solid var(--light-color);
    transition: var(--transition);
    overflow: hidden;
}

.service-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
    transform: translateY(-5px);
}

.service-card .card-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.service-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.service-card:hover .card-image img {
    transform: scale(1.05);
}

.service-card h3 {
    padding: 20px 20px 10px;
}

.service-card p {
    padding: 0 20px;
}

.service-card .learn-more {
    display: block;
    padding: 15px 20px 20px;
}

.service-card i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.service-card h3 {
    margin-bottom: 15px;
    color: var(--dark-color);
}

.service-card p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.learn-more {
    color: var(--primary-color);
    font-weight: 600;
}

.learn-more:hover {
    color: var(--secondary-color);
}

/* 统计数据 */
.stats {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-color) 100%);
    padding: 80px 0;
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item {
    padding: 20px;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 合作伙伴 */
.partners {
    padding: 80px 0;
    background-color: var(--light-color);
}

.partners-logos {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 25px;
    margin-top: 40px;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.partner-logo {
    background: var(--white);
    padding: 25px 30px;
    border: 2px solid #e8e8e8;
    border-radius: 12px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 80px;
}

.partner-logo img {
    max-width: 140px;
    max-height: 45px;
    width: auto;
    height: auto;
    filter: grayscale(100%);
    opacity: 0.7;
    transition: var(--transition);
}

.partner-logo:hover {
    border-color: var(--primary-color);
    box-shadow: 0 8px 25px rgba(26, 95, 122, 0.15);
    transform: translateY(-3px);
}

.partner-logo:hover img {
    filter: grayscale(0%);
    opacity: 1;
}

@media (max-width: 900px) {
    .partners-logos {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .partners-logos {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    .partner-logo {
        padding: 15px;
    }
}

/* CTA 区域 */
.cta {
    padding: 80px 0;
    background-color: var(--dark-color);
    color: var(--white);
    text-align: center;
}

.cta h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.cta p {
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* 触摸优化 */
@media (hover: none) and (pointer: coarse) {
    /* 触摸设备优化 */
    .btn, .learn-more, .nav-links a {
        min-height: 44px;
        min-width: 44px;
    }

    .btn {
        padding: 14px 32px;
    }

    .mobile-menu {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* 禁用hover效果，使用active */
    .btn-primary:hover,
    .btn-secondary:hover {
        transform: none;
    }

    .btn-primary:active,
    .btn-secondary:active {
        opacity: 0.8;
        transform: scale(0.98);
    }

    /* 增大触摸目标 */
    .nav-links a {
        padding: 15px 20px;
    }

    .footer-section ul li a {
        padding: 8px 0;
        display: inline-block;
    }
}

/* 禁止文本选择（可选） */
.no-select {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* 页脚 */
.footer {
    background-color: #1a1a2e;
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    margin-bottom: 20px;
    color: var(--accent-color);
}

.footer-section p {
    margin-bottom: 10px;
    opacity: 0.8;
}

.footer-section i {
    margin-right: 10px;
    color: var(--accent-color);
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    opacity: 0.7;
}

/* 响应式设计 - Mobile First */
@media (max-width: 768px) {
    /* 导航栏移动端优化 */
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 15px 20px;
        box-shadow: var(--shadow);
        z-index: 1001;
    }

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

    .nav-links li {
        margin: 10px 0;
        border-bottom: 1px solid #eee;
        padding-bottom: 10px;
    }

    .nav-links li:last-child {
        border-bottom: none;
    }

    .nav-links a {
        font-size: 1.1rem;
        display: block;
        padding: 8px 0;
    }

    .mobile-menu {
        display: block;
        font-size: 1.5rem;
        cursor: pointer;
        padding: 10px;
    }

    /* Hero区域移动端 */
    .hero {
        padding: 120px 20px 60px;
        min-height: auto;
    }

    .hero h1 {
        font-size: 1.8rem;
        line-height: 1.3;
    }

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

    .hero-desc {
        font-size: 0.95rem;
        padding: 0 10px;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
        width: 100%;
        max-width: 280px;
        margin: 0 auto;
    }

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

    /* 标题字号调整 */
    .section-title {
        font-size: 1.6rem;
        padding: 0 10px;
    }

    .section-subtitle {
        font-size: 0.95rem;
        padding: 0 15px;
    }

    /* 特性卡片网格 */
    .features-grid,
    .services-grid {
        grid-template-columns: 1fr;
        gap: 25px;
        padding: 0 10px;
    }

    .feature-card,
    .service-card {
        padding: 30px 20px;
    }

    /* 修复移动端服务卡片图片显示问题 */
    .service-card {
        padding: 0;
        overflow: hidden;
    }

    .service-card .card-image {
        width: 100%;
        height: 200px;
        margin: 0;
    }

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

    .service-card h3 {
        padding: 20px 20px 10px;
    }

    .service-card p {
        padding: 0 20px 15px;
    }

    .service-card .learn-more {
        display: block;
        padding: 0 20px 20px;
    }

    /* 统计数据 */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px 15px;
        padding: 0 10px;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .stat-label {
        font-size: 0.9rem;
    }

    /* 合作流程 */
    .process-steps {
        flex-direction: column;
        gap: 30px;
    }

    .process-step {
        padding: 25px 20px;
    }

    .step-number {
        font-size: 2rem;
    }

    /* 合作伙伴 */
    .partners-logos {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        padding: 0 10px;
    }

    /* CTA区域 */
    .cta {
        padding: 60px 20px;
    }

    .cta h2 {
        font-size: 1.5rem;
    }

    /* 页脚 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }

    .footer-section {
        padding: 0 10px;
    }

    /* Logo调整 */
    .logo-img {
        width: 40px;
        height: 40px;
    }

    .logo .brand-en {
        font-size: 1.1rem;
    }

    .logo .slogan {
        font-size: 0.55rem;
    }
}

/* 超小屏幕优化 */
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

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

    .section-title {
        font-size: 1.4rem;
    }

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

    .stat-number {
        font-size: 1.5rem;
    }

    .partner-logo {
        padding: 15px 10px;
    }

    .partner-logo img {
        max-height: 35px;
    }
}