/* 默认主题变量（亮色主题） */
:root {
    --bg-color: #fff;
    --text-color: #333;
    /* --card-bg: #ffffff; */
    --card-bg: rgba(255, 255, 255, 0.05);
    --header-border: rgba(0, 0, 0, 0.1);
    --input-bg: #ffffff;
    --input-border: #ddd;
    --input-text: #333;
    --feature-card-bg: rgba(255, 255, 255, 0.58);
    --feature-card-hover-bg: rgb(238, 255, 252);
    --feature-card-border-shadow: rgb(28 27 27 / 36%);
    --button-bg: #4a4a4a;
    --button-text: #ffffff;
    --button-hover: #333333;
    --chart-bg: #ffffff;
    --code-bg: #f8f9fa;
    --code-text: #333;
    --footer-border: rgba(0, 0, 0, 0.1);
    --footer-text: #777;
    --column-tag-bg: #e9ecef;
    --column-tag-hover: #dee2e6;
    --column-remove-btn: #ff4d4d;
    --column-removed-bg: #f8f9fa;
    --column-removed-text: #6c757d;
    --column-removed-border: #dee2e6;
    --column-removed-hover: #e9ecef;

    --custom-input-border: #ddd;
    --custom-input-bg: #ffffff;
    --custom-input-text: #333;
}

/* 暗色主题变量 */
[data-theme="dark"] {
    --bg-color: #1a1a2e;
    --text-color: #e6e6e6;
    --card-bg: rgba(255, 255, 255, 0.05);
    --header-border: rgba(255, 255, 255, 0.1);
    --input-bg: #333;
    --input-border: #555;
    --input-text: #fff;
    --feature-card-bg: rgba(255, 255, 255, 0.05);
    --feature-card-hover-bg: rgba(255, 255, 255, 0.1);
    --feature-card-border-shadow: rgb(255 255 255 / 36%);
    --button-bg: #4a4a4a;
    --button-text: #ffffff;
    --button-hover: #5a5a5a;
    --chart-bg: rgba(255, 255, 255, 0.05);
    --code-bg: #2d2d2d;
    --code-text: #aaa;
    --footer-border: rgba(255, 255, 255, 0.1);
    --footer-text: #777;
    --column-tag-bg: rgba(255, 255, 255, 0.1);
    --column-tag-hover: rgba(255, 255, 255, 0.15);
    --column-remove-btn: #ff6b6b;
    --column-removed-bg: #2d2d2d;
    --column-removed-text: #aaa;
    --column-removed-border: #555;
    --column-removed-hover: #3d3d3d;
    --custom-input-border: #555;
    --custom-input-bg: #333;
    --custom-input-text: #fff;
}

/* 主题切换按钮样式 */
.theme-toggle {
    background: var(--button-bg);
    color: var(--button-text);
    border: none;
    border-radius: 6px;
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--button-hover);
    transform: translateY(-2px);
}

/* 基础样式 */
/* body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
} */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* header样式中的固定颜色值需要改为变量 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--header-border);
    /* 原使用rgba(255, 255, 255, 0.1) */
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(90deg, #00dbde, #fc00ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--text-color);
    /* 原使用#ccc */
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

nav a:hover {
    color: var(--text-color);
    /* 原使用#fff，这里改为var(--text-color)更合理 */
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #00dbde, #fc00ff);
    transition: width 0.3s ease;
}

nav a:hover::after {
    width: 100%;
}

/* 确保导航栏正确垂直居中 */
header nav ul {
    display: flex;
    align-items: center;
    height: 100%;
}

header nav ul li {
    display: flex;
    align-items: center;
}

.hero {
    text-align: center;
    padding: 5rem 0;
    position: relative;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, #00dbde, #fc00ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 2.5rem;
    color: var(--text-color);
    /* 原使用#aaa */
    line-height: 1.6;
}


.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: linear-gradient(90deg, #00dbde, #fc00ff);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 5rem 0;
}

.feature-card {
    background: var(--feature-card-bg);
    border-radius: 10px;
    padding: 2rem;
    transition: transform 0.3s ease, background 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: inset 0 0 15px var(--feature-card-border-shadow);
    /* box-shadow: inset 0 0 15px rgb(255 255 255 / 36%); */
}

.feature-card:hover {
    transform: translateY(-10px);
    background: var(--feature-card-hover-bg);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, #2db8b877, #fc00ff);
    -webkit-background-clip: text;
    font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", "Segoe UI Symbol", "Android Emoji", sans-serif;
    filter: drop-shadow(0 0 0 transparent);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 60px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-color);
    /* 原使用#aaa */
    line-height: 1.6;
}

/* footer样式中的固定颜色值需要改为变量 */
footer {
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid var(--footer-border);
    /* 原使用rgba(255, 255, 255, 0.1) */
    margin-top: 3rem;
    color: var(--footer-text);
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    nav ul {
        gap: 1rem;
    }
}


.section {
    background: var(--card-bg);
    border-radius: 10px;
    padding: 2rem;
    backdrop-filter: blur(5px);
    margin-bottom: 2rem;
    border: 1px solid var(--header-border);
}

.plain {
    background: linear-gradient(90deg, #00000078, #4a4a4a) !important;
}

[data-theme="dark"] .plain {
    background: linear-gradient(90deg, #28292978, #716f715c) !important;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
    position: relative;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    background: linear-gradient(90deg, #00dbde, #fc00ff);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}