/* 复用首页的全局样式 */
:root {
    --primary: #1e88e5;
    --primary-dark: #1565c0;
    --secondary: #ff6d00;
    --light: #f5f7fa;
    --dark: #263238;
    --gray: #78909c;
    --success: #43a047;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f9f9f9;
    color: #333;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

    .section-title h2 {
        font-size: 2.2rem;
        color: var(--dark);
        margin-bottom: 15px;
    }

    .section-title p {
        color: var(--gray);
        max-width: 700px;
        margin: 0 auto;
        font-size: 1.1rem;
    }

    .section-title::after {
        content: '';
        position: absolute;
        bottom: -15px;
        left: 50%;
        transform: translateX(-50%);
        width: 70px;
        height: 4px;
        background: var(--primary);
        border-radius: 2px;
    }

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary);
    color: white;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

    .btn:hover {
        background: var(--primary-dark);
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    }

.btn-secondary {
    background: var(--secondary);
}

    .btn-secondary:hover {
        background: #e65100;
    }

/* 导航栏 */
header {
    background-color: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

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

    .logo img {
        height: 40px;
        margin-right: 10px;
    }

    .logo h1 {
        font-size: 1.5rem;
        color: var(--primary);
        font-weight: 700;
    }

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

    .nav-links li {
        margin-left: 30px;
    }

    .nav-links a {
        text-decoration: none;
        color: var(--dark);
        font-weight: 500;
        font-size: 1.05rem;
        transition: color 0.3s;
        position: relative;
    }

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

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width 0.3s;
        }

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



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

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

.footer-col h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

    .footer-col h3::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 50px;
        height: 2px;
        background: var(--primary);
    }

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

    .footer-links li {
        margin-bottom: 15px;
    }

    .footer-links a {
        color: #b0bec5;
        text-decoration: none;
        transition: color 0.3s;
    }

        .footer-links a:hover {
            color: white;
        }

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

    .social-links a {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: rgba(255,255,255,0.1);
        border-radius: 50%;
        color: white;
        transition: all 0.3s;
    }

        .social-links a:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #b0bec5;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }
}

/* 第一阶段页面特有样式 */
.phase-header {
    background: linear-gradient(135deg, rgba(30,136,229,0.9) 0%, rgba(33,150,243,0.9) 100%), url('https://images.unsplash.com/photo-1542831371-29b0f74f9713?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1200&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 100px 0 60px;
    text-align: center;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1rem;
}

    .breadcrumb a {
        color: rgba(255, 255, 255, 0.8);
        text-decoration: none;
        transition: color 0.3s;
    }

        .breadcrumb a:hover {
            color: white;
        }

    .breadcrumb span {
        margin: 0 10px;
        color: rgba(255, 255, 255, 0.6);
    }

.phase-header h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
    font-weight: 800;
}

.phase-header p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

.phase-info {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.info-card {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px 30px;
    text-align: center;
    min-width: 180px;
}

    .info-card .number {
        font-size: 2.2rem;
        font-weight: 700;
        margin-bottom: 5px;
    }

    .info-card .label {
        font-size: 0.95rem;
        opacity: 0.9;
    }

.overview-section {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    padding: 40px;
    margin-top: -40px;
    position: relative;
    z-index: 10;
}

.overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.overview-card {
    background: rgba(30, 136, 229, 0.05);
    border-radius: 10px;
    padding: 25px;
    border-left: 4px solid var(--primary);
    transition: all 0.3s;
}

    .overview-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    }

    .overview-card h3 {
        color: var(--primary);
        margin-bottom: 15px;
        display: flex;
        align-items: center;
    }

        .overview-card h3 i {
            margin-right: 10px;
        }

    .overview-card p {
        margin-bottom: 0;
        line-height: 1.7;
    }

.timeline-container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    padding: 40px;
    margin-top: 40px;
}

.timeline-header {
    text-align: center;
    margin-bottom: 40px;
}

    .timeline-header h2 {
        font-size: 2rem;
        color: var(--dark);
        margin-bottom: 15px;
    }

    .timeline-header p {
        color: var(--gray);
        max-width: 700px;
        margin: 0 auto;
    }

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

    .timeline::before {
        content: '';
        position: absolute;
        top: 0;
        bottom: 0;
        width: 4px;
        background: var(--primary);
        left: 50%;
        margin-left: -2px;
    }

.timeline-item {
    position: relative;
    margin-bottom: 50px;
}

    .timeline-item:nth-child(odd) .timeline-content {
        margin-left: auto;
        margin-right: 55%;
        text-align: right;
        padding-right: 30px;
    }

    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 55%;
        padding-left: 30px;
    }

.timeline-icon {
    position: absolute;
    left: 50%;
    top: 0;
    width: 50px;
    height: 50px;
    background: white;
    border: 4px solid var(--primary);
    border-radius: 50%;
    margin-left: -25px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.5rem;
    z-index: 10;
}

.timeline-content {
    position: relative;
    background: white;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
    padding: 25px;
    transition: all 0.3s;
}

    .timeline-content:hover {
        box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        transform: translateY(-3px);
    }

.week-title {
    color: var(--primary);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.week-details {
    margin-top: 20px;
}

.week-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

    .week-table th {
        background: rgba(30, 136, 229, 0.1);
        color: var(--primary);
        padding: 12px;
        text-align: left;
    }

    .week-table td {
        padding: 12px;
        border-bottom: 1px solid #eee;
    }

    .week-table tr:last-child td {
        border-bottom: none;
    }

.resources-section {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    padding: 40px;
    margin-top: 60px;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.resource-card {
    background: rgba(30, 136, 229, 0.03);
    border-radius: 10px;
    padding: 25px;
    border: 1px solid #e0e0e0;
    transition: all 0.3s;
}

    .resource-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        border-color: var(--primary);
    }

    .resource-card h3 {
        color: var(--primary);
        margin-bottom: 15px;
        display: flex;
        align-items: center;
    }

        .resource-card h3 i {
            margin-right: 10px;
        }

.resource-list {
    list-style: none;
    padding-left: 0;
}

    .resource-list li {
        margin-bottom: 12px;
        padding-left: 25px;
        position: relative;
    }

        .resource-list li::before {
            content: '•';
            position: absolute;
            left: 10px;
            color: var(--primary);
            font-weight: bold;
        }

.tool-section {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
    padding: 40px;
    margin-top: 40px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.tool-card {
    background: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    border: 1px solid #e0e0e0;
    transition: all 0.3s;
}

    .tool-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 20px rgba(0,0,0,0.1);
        border-color: var(--primary);
    }

    .tool-card h3 {
        color: var(--primary);
        margin-bottom: 15px;
        display: flex;
        align-items: center;
    }

        .tool-card h3 i {
            margin-right: 10px;
        }

@media (max-width: 992px) {
    .timeline::before {
        left: 30px;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 70px;
        margin-right: 0;
        text-align: left;
        padding-left: 30px;
        padding-right: 30px;
    }

    .timeline-icon {
        left: 30px;
    }
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown-content {
    display: none;
    position: absolute;
    background: white;
    min-width: 200px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    border-radius: 8px;
    z-index: 1;
    top: 100%;
    left: 0;
    padding: 10px 0;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-content a {
    display: block;
    padding: 10px 20px;
    color: var(--dark);
    text-decoration: none;
    transition: all 0.2s;
}

    .dropdown-content a:hover {
        background: rgba(74, 110, 224, 0.05);
        color: var(--primary);
    }