/* Ula 隐私协议 - 时间线流程式（完全不同布局） */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: #1f2937;
    background: #f3f4f6;
    padding: 0;
}

/* 固定顶栏 */
.header {
    background: linear-gradient(90deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    padding: 30px 40px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.header h1 {
    font-size: 2.2em;
    font-weight: 800;
    margin-bottom: 8px;
}

.header .app-name {
    font-size: 1.1em;
    opacity: 0.95;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 20px;
}

.effective-date {
    background: white;
    padding: 20px;
    text-align: center;
    font-weight: 700;
    color: #3b82f6;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    margin-bottom: 50px;
    border: 3px solid #3b82f6;
}

.content {
    position: relative;
    padding-left: 60px;
}

/* 时间线主线 */
.content::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, #3b82f6 0%, #1d4ed8 100%);
}

/* 时间线节点式section */
.section {
    position: relative;
    margin-bottom: 60px;
    padding: 35px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.section::before {
    content: '';
    position: absolute;
    left: -52px;
    top: 25px;
    width: 24px;
    height: 24px;
    background: #3b82f6;
    border: 4px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 4px #3b82f6;
}

.section:hover {
    transform: translateX(10px);
    box-shadow: 0 12px 35px rgba(59, 130, 246, 0.2);
}

.section:hover::before {
    background: #1d4ed8;
    box-shadow: 0 0 0 4px #1d4ed8, 0 0 20px rgba(59, 130, 246, 0.5);
}

.section h2 {
    color: #1e40af;
    font-size: 1.8em;
    margin-bottom: 20px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 15px;
}

.section h2::before {
    content: '📋';
    font-size: 1.2em;
}

.section h3 {
    color: #2563eb;
    font-size: 1.3em;
    margin: 25px 0 15px 0;
    font-weight: 700;
    padding-left: 15px;
    border-left: 4px solid #60a5fa;
}

.section p {
    margin-bottom: 16px;
    color: #4b5563;
    line-height: 1.8;
}

.section ul {
    margin: 18px 0 18px 30px;
}

.section li {
    margin-bottom: 10px;
    color: #4b5563;
    line-height: 1.7;
}

.intro {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    padding: 30px;
    border-radius: 12px;
    border-left: 6px solid #3b82f6;
    margin-bottom: 50px;
    position: relative;
}

.intro::before {
    content: '🔒';
    font-size: 3em;
    position: absolute;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.2;
}

.highlight-box {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    padding: 25px;
    margin: 25px 0;
    border-radius: 12px;
    border-left: 6px solid #f59e0b;
}

.contact-box {
    background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
    color: white;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 15px 40px rgba(30, 64, 175, 0.3);
    position: relative;
    margin-top: 60px;
}

.contact-box::before {
    content: '';
    position: absolute;
    left: -52px;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    background: #1e40af;
    border: 5px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 5px #1e40af;
}

.contact-box h2 {
    color: white;
    margin-bottom: 20px;
}

.contact-box h2::before {
    content: '📧';
}

.contact-box a {
    color: #dbeafe;
    text-decoration: none;
    font-weight: 700;
    border-bottom: 2px solid #dbeafe;
}

.footer {
    background: #111827;
    color: #9ca3af;
    padding: 40px;
    text-align: center;
    border-radius: 15px;
    margin-top: 60px;
    margin-left: -60px;
}

@media (max-width: 768px) {
    .content {
        padding-left: 40px;
    }

    .content::before {
        left: 15px;
    }

    .section::before {
        left: -37px;
        width: 20px;
        height: 20px;
    }

    .section {
        padding: 25px 20px;
    }

    .section h2 {
        font-size: 1.5em;
    }

    .contact-box::before {
        left: -37px;
        width: 24px;
        height: 24px;
    }

    .footer {
        margin-left: -40px;
    }
}