/* 全局重置 & 整体放大基调 (使用 rem 基准放大) */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 根字体放大，让整体页面比例更舒展 (原默认16px → 18px) */
html {
    font-size: 18px;
    max-width: 100%;
    overflow-x: hidden;
}

body {
    background: #000000;
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    color: #1e2f3d;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
    max-width: 100%;
    overflow-x: hidden;
}

/* 页眉 - 视觉放大 */
.header {
    background: #171717;
    padding: 1.2rem 2rem;
    font-size: 2.2rem;
    font-weight: 600;
    color: #ffffff;
    text-align: center;
    flex-shrink: 0;
    letter-spacing: 1px;
    max-width: 100%;
    overflow-x: hidden;
}

/* 白色卡片区域 - 更宽松的内边距，呼吸感 */
.content {
    max-width: 1090px;
    margin: 2rem auto;
    background: white;
    border-radius: 25px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
    width: calc(100% - 3rem);
    flex: 1 0 auto;
    padding: 2.2rem 2.5rem;
    transition: all 0.2s;
    overflow-x: auto;  /* 允许内部滚动，但不会导致body滚动 */
}

/* 响应式调整，但整体依然保持放大舒适 */
@media (max-width: 768px) {
    html {
        font-size: 16px;
    }
    .content {
        margin: 1.5rem auto;
        width: calc(100% - 2rem);
        padding: 1.8rem;
    }
    .header {
        font-size: 1.8rem;
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 15px;
    }
    .content {
        padding: 1.5rem;
    }
}

/* 主标题: 更大更醒目 */
.main-title {
    font-size: 2.6rem;
    font-weight: 700;
    color: #000000;
    margin-bottom: 1.6rem;
    padding-bottom: 1rem;
    border-bottom: 4px solid #7aa5c7;
    letter-spacing: -0.3px;
    word-wrap: break-word;
    word-break: break-word;
}

/* 二级小标题 (软件下载/安装前须知) */
.sub-title {
    font-size: 1.7rem;
    font-weight: 600;
    color: #111;
    margin: 1.8rem 0 0.8rem 0;
    border-left: 5px solid #7aa5c7;
    padding-left: 1rem;
    word-wrap: break-word;
    word-break: break-word;
}

/* 步骤主标题 Matlab 2024b win10 安装步骤 */
.step-title {
    font-size: 1.8rem;
    font-weight: 650;
    color: #000;
    margin: 2rem 0 1.2rem 0;
    background: #f5f7fa;
    padding: 0.6rem 1rem;
    border-radius: 12px;
    word-wrap: break-word;
    word-break: break-word;
}

/* 须知列表 - 放大间距 */
.notice-list {
    list-style: none;
    margin: 0.5rem 0 1rem 0;
    padding-left: 0;
}
.notice-list li {
    position: relative;
    padding-left: 1.8rem;
    margin-bottom: 0.85rem;
    font-size: 1.05rem;
    line-height: 1.55;
    color: #1e2f3d;
    word-wrap: break-word;
    word-break: break-word;
}
.notice-list li:before {
    content: "•";
    position: absolute;
    left: 0.3rem;
    color: #7aa5c7;
    font-size: 1.3rem;
    font-weight: bold;
}

/* 步骤内容样式，文本更舒适 */
.step-content {
    font-size: 1.05rem;
    line-height: 1.65;
    color: #2c3e44;
    margin-bottom: 1.2rem;
    background: #fefefe;
    padding: 0.2rem 0;
    word-wrap: break-word;
    word-break: break-word;  /* 强制长字符串（如密钥）换行 */
    overflow-wrap: break-word;
}

.step-content strong {
    font-weight: 700;
    color: #000;
}

.step-content .bold-highlight {
    font-weight: 800;
    color: #c0392b;
    background: #fff0f0;
    padding: 0.1rem 0.3rem;
    border-radius: 8px;
    display: inline-block;
    max-width: 100%;
}

/* 针对长密钥字符串的特殊处理 */
.step-content strong[style*="monospace"],
.step-content strong[style*="background"] {
    display: inline-block;
    max-width: 100%;
    word-break: break-all;
    white-space: normal;
    overflow-wrap: break-word;
}

/* 图片容器 - 更大留白，图片圆润 */
.step-image {
    margin: 1.6rem 0 1.8rem 0;
    text-align: center;
    background: #fafbfc;
    border-radius: 20px;
    padding: 0.8rem;
    transition: transform 0.1s ease;
    max-width: 100%;
    overflow: hidden;
}
.step-image img {
    max-width: 100%;
    height: auto;
    border-radius: 14px;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.1);
    border: 1px solid #e9ecef;
    display: block;
    margin: 0 auto;
}
.image-caption {
    margin-top: 12px;
    font-size: 0.9rem;
    color: #5d6f7f;
    text-align: center;
    font-weight: 500;
    word-wrap: break-word;
}

/* 下载区域整体放大且清晰 */
.download-item {
    display: flex;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin: 0.8rem 0 0.2rem;
    background: #f8f9fc;
    padding: 1rem 1.2rem;
    border-radius: 18px;
    border-left: 6px solid #2c7da0;
    max-width: 100%;
    overflow-x: auto;
}

.software-name {
    color: #000000;
    font-size: 1.1rem;
    font-weight: 600;
    margin-right: 0.5rem;
    flex-shrink: 0;
}

.disk-links {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 1.2rem;
    align-items: center;
}

/* 网盘链接样式：大按钮感，红色加粗但更雅致 */
.disk-link {
    color: #0d31c3;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.05rem;
    background: #ffffff;
    padding: 0.3rem 1rem;
    border-radius: 40px;
    transition: all 0.2s;
    display: inline-block;
    border: 1px solid #cfdfed;
    white-space: nowrap;
}

@media (max-width: 600px) {
    .disk-link {
        white-space: normal;  /* 小屏幕下允许换行 */
    }
}

.disk-link:hover {
    color: #ffffff;
    background-color: #0d31c3;
    border-color: #0d31c3;
    text-decoration: none;
    box-shadow: 0 4px 10px rgba(13,49,195,0.2);
}

/* 页脚加大字号 */
.footer {
    background: #171717;
    text-align: center;
    padding: 1.2rem;
    font-size: 0.9rem;
    color: #c0c0c0;
    flex-shrink: 0;
    width: 100%;
    margin-top: auto;
    max-width: 100%;
    overflow-x: hidden;
}

/* 温馨提示区块 */
.content > div:last-child {
    max-width: 100%;
    overflow-x: auto;
}

/* 确保所有容器都不会溢出 */
article, section, div, main, header, footer {
    max-width: 100%;
}

/* 表格或代码块（如有）的安全处理 */
pre, code {
    white-space: pre-wrap;
    word-wrap: break-word;
    word-break: break-all;
    max-width: 100%;
    overflow-x: auto;
}

/* 修复所有链接和按钮溢出问题 */
a, button {
    max-width: 100%;
    word-wrap: break-word;
}

/* 细微响应优化 */
@media (max-width: 600px) {
    .disk-links {
        gap: 0.8rem;
        margin-top: 0.3rem;
    }
    .disk-link {
        padding: 0.2rem 0.8rem;
        font-size: 0.95rem;
    }
    .main-title {
        font-size: 2rem;
    }
    .step-title {
        font-size: 1.5rem;
    }
    .sub-title {
        font-size: 1.4rem;
    }
    .content {
        padding: 1rem;
    }
}