* {
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 0;
}
body {
    background: #f2f4f7;
    padding-bottom: 60px;
}

/* 头部样式 */
.header {
    background: #007aff;
    color: #fff;
    padding: 18px 20px;
    text-align: center;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}
.nav {
    margin-top: 10px;
}
.nav a {
    color: #fff;
    text-decoration: none;
    padding: 6px 10px;
    margin: 0 6px;
    border-radius: 8px;
}
.nav a:hover {
    background: rgba(255,255,255,0.2);
}
/* 导航高亮（和截图一样，首页白底蓝字） */
.nav a.active {
    background: #ffffff;
    color: #007aff;
    font-weight: bold;
}

/* 容器 */
.container {
    max-width: 420px;
    margin: 30px auto;
    padding: 0 15px;
}

/* 欢迎卡片 */
.welcome-card {
    background: #fff;
    border-radius: 16px;
    padding: 24px 26px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}
.welcome-card h3 {
    font-size: 26px;
    margin-bottom: 12px;
    color: #222;
}
.welcome-card p {
    line-height: 1.6;
    color: #444;
    font-size: 16px;
}

/* 工具列表容器 */
.tool-list {
    display: flex;
    flex-direction: column;
    gap: 16px; /* 项目之间的间距 */
}

/* 单个工具卡片 */
.tool-item {
    background: #fff;
    border-radius: 16px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}

/* 图标+文字布局 */
.tool-header {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
}
.tool-icon {
    font-size: 32px;
    margin-right: 12px;
    line-height: 1;
}
.tool-info h4 {
    font-size: 22px;
    color: #1a1a1a;
    margin-bottom: 4px;
}
.tool-info p {
    font-size: 16px;
    color: #666;
    line-height: 1.4;
}

/* 按钮样式（修复灰色问题，变成蓝色） */
.tool-btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 16px;
    background: #007aff; /* 确保是蓝色 */
    color: #fff;
    font-size: 18px;
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    display: block;
    text-decoration: none;
}
.tool-btn:hover {
    background: #0066cc;
}

/* 通用输入/按钮兼容样式 */
input {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 10px;
}
button {
    width: 100%;
    padding: 13px;
    border: none;
    border-radius: 12px;
    color: #fff;
    font-size: 16px;
    margin-top: 10px;
    cursor: pointer;
}
.btn-blue { background: #007aff; }
.btn-red { background: #ff3b30; }
.res {
    background: #f9fbfc;
    padding: 14px;
    border-radius: 12px;
    margin: 12px 0;
    border: 1px solid #eee;
}
/* 小按钮样式 */
.btn-sm {
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 14px;
    width: auto;
    margin: 0;
}
.btn-default {
    background: #f2f4f7;
    color: #333;
}
.btn-active {
    background: #007aff;
    color: #fff;
}
/* 热搜列表样式（已保留） */
.hot-item {
    padding: 16px 20px;
    margin-bottom: 12px;
    border-radius: 12px;
    transition: background 0.2s;
}
.hot-item:hover {
    background: #f9fbfc;
}