/* iSeeMe · 知己者也 - 通用样式表 */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
    color: #333;
    line-height: 1.6;
    padding: 0; /* 移除默认内边距 */
    margin: 0;
    min-height: 100vh;
}

.container {
    width: 100%; /* 全屏宽度 */
    min-height: 100vh;
    margin: 0;
    background: white;
    box-shadow: none; /* 移除阴影 */
    padding: 0;
    position: relative;
}

/* 主内容区域限制阅读宽度 */
.content-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px;
}

.header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid #eaeaea;
    position: relative;
}

.logo {
    font-size: 42px;
    font-weight: 700;
    color: #1a73e8;
    margin-bottom: 10px;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 22px;
    color: #5f6368;
    margin-bottom: 15px;
    font-weight: 300;
}

.info {
    font-size: 14px;
    color: #80868b;
    margin-top: 5px;
}

.section {
    margin-bottom: 40px;
}

.section-title {
    font-size: 22px;
    font-weight: 600;
    color: #1a73e8;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e8f0fe;
}

.highlight {
    background-color: #e8f0fe;
    padding: 3px 5px;
    border-radius: 3px;
    font-weight: 500;
}

.btn-export {
    position: absolute;
    top: 30px;
    right: 30px;
    background-color: #1a73e8;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-export:hover {
    background-color: #0d62d9;
}

.btn-export svg {
    width: 16px;
    height: 16px;
}

.quote {
    font-style: italic;
    color: #555;
    border-left: 4px solid #1a73e8;
    padding-left: 20px;
    margin: 20px 0;
    font-size: 17px;
}

ul, ol {
    margin: 15px 0;
    padding-left: 30px;
}

li {
    margin-bottom: 10px;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-blue);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-blue-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(26, 115, 232, 0.4);
}

.back-to-top:active {
    transform: translateY(-1px);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    transition: transform 0.3s ease;
}

.back-to-top:hover svg {
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
    
    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .content-wrapper {
        padding: 20px;
    }
    
    .logo {
        font-size: 32px;
    }
    
    .subtitle {
        font-size: 18px;
    }
    
    .btn-export {
        position: relative;
        top: 0;
        right: 0;
        margin-bottom: 20px;
        width: 100%;
        justify-content: center;
    }
}