/* ==================== 全局样式 ==================== */
:root {
    --color-primary: #00B894;  /* 生态绿 */
    --color-primary-dark: #00A384;
    --color-secondary: #0984E3;  /* 科技蓝 */
    --color-secondary-dark: #0768B8;
    --color-text: #2D3436;
    --color-text-light: #636E72;
    --color-bg: #FFFFFF;
    --color-bg-light: #F8F9FA;
    --color-border: #DFE6E9;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

.section {
    padding: 80px 0;
}

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

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
    color: white;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    transition: var(--transition);
}

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

.nav-link.active {
    color: var(--color-primary);
}

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

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* ==================== Hero 首屏 ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #F0FFF4 0%, #E3F2FD 100%);
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="%2300B89410"/><circle cx="20" cy="80" r="15" fill="%230984E310"/><circle cx="80" cy="20" r="25" fill="%2300B89410"/></svg>');
    background-size: 400px;
    animation: float 20s linear infinite;
}

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

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--color-text);
}

.hero-text h1 span {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text .subtitle {
    font-size: 20px;
    color: var(--color-text-light);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-text .stats {
    display: flex;
    gap: 40px;
    margin-bottom: 32px;
}

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

.stat-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--color-primary);
    display: block;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-light);
}

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

.hero-image {
    position: relative;
}

.hero-image-inner {
    background: white;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    position: relative;
}

.hero-image-inner::before {
    content: '🗺️';
    font-size: 150px;
}

.hero-badges {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    justify-content: center;
}

.badge {
    background: rgba(0, 184, 148, 0.1);
    color: var(--color-primary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

/* ==================== 解决方案板块 ==================== */
.solutions {
    background: var(--color-bg-light);
}

.solutions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.solution-card {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-left: 4px solid var(--color-primary);
}

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

.solution-card.secondary {
    border-left-color: var(--color-secondary);
}

.solution-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.solution-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--color-text);
}

.solution-desc {
    font-size: 16px;
    color: var(--color-text-light);
    margin-bottom: 24px;
    line-height: 1.8;
}

.features-list {
    margin-bottom: 24px;
}

.features-list li {
    padding: 10px 0;
    padding-left: 30px;
    position: relative;
    color: var(--color-text);
    font-size: 15px;
}

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

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.comparison-table th,
.comparison-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
    background: linear-gradient(135deg, rgba(0, 184, 148, 0.1), rgba(9, 132, 227, 0.1));
    font-weight: 700;
    color: var(--color-text);
}

.comparison-table tr:hover {
    background: rgba(0, 184, 148, 0.05);
}

/* ==================== 成功案例 ==================== */
.portfolio {
    background: white;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.portfolio-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.portfolio-image {
    height: 240px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
}

.portfolio-content {
    padding: 24px;
}

.portfolio-tag {
    display: inline-block;
    background: rgba(0, 184, 148, 0.1);
    color: var(--color-primary);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.portfolio-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}

.portfolio-desc {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 16px;
    line-height: 1.6;
}

.portfolio-stats {
    display: flex;
    gap: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.portfolio-stat {
    font-size: 13px;
    color: var(--color-text-light);
}

.portfolio-stat strong {
    color: var(--color-primary);
    font-weight: 700;
}

/* ==================== 问答板块 (FAQ) ==================== */
.faq {
    background: var(--color-bg-light);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 24px;
}

.faq-item {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.faq-question::before {
    content: 'Q';
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.faq-answer {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.8;
    padding-left: 40px;
}

.faq-answer strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* ==================== CTA 呼吁 ==================== */
.cta {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    text-align: center;
}

.cta h2 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 20px;
}

.cta p {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.95;
}

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

.cta .btn:hover {
    background: rgba(255, 255, 255, 0.9);
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--color-text);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: white;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .hero-text .stats {
        justify-content: center;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
    }

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

    .mobile-menu-btn {
        display: block;
    }

    .hero-text h1 {
        font-size: 36px;
    }

    .section-title {
        font-size: 28px;
    }

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

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