/* --- 全局重置与基础设定 --- */
:root {
    --primary-color: #00ddb3;
    --secondary-color: #23a8d9;
    --background-color: #0d1117;
    --surface-color: #161b22;
    --text-color: #e6edf3;
    --text-muted-color: #8b949e;
    --border-color: #30363d;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

/* --- 英雄区域 (Header) --- */
.hero {
    background: linear-gradient(45deg, var(--background-color), #112227);
    padding: 6rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted-color);
    max-width: 600px;
    margin: 0 auto 2rem auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* --- 按钮样式 --- */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: var(--background-color);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 221, 179, 0.15);
}

/* --- 通用区块样式 --- */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.section-description {
    text-align: center;
    color: var(--text-muted-color);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

main > section {
    padding: 5rem 0;
}

/* --- 特性区域 --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--surface-color);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.feature-card p {
    color: var(--text-muted-color);
}

/* --- 实时体验区域 --- */
.live-demo-section {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.customizer {
    background-color: var(--background-color);
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.control-group {
    margin-bottom: 2.5rem;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

/* 光标样式库 */
.icon-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 1rem;
}

.icon-item {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 80px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.icon-item:hover, .icon-item.active {
    transform: scale(1.1);
    border-color: var(--primary-color);
    background-color: rgba(0, 221, 179, 0.1);
}

.icon-item img {
    width: 32px;
    height: 32px;
    margin-bottom: 0.5rem;
}

.icon-item span {
    font-size: 0.75rem;
    color: var(--text-muted-color);
}

/* 效果按钮 */
.button-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.btn-effect {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background-color: var(--surface-color);
    color: var(--text-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-effect:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.btn-effect.active {
    background-color: var(--secondary-color);
    color: var(--background-color);
    border-color: var(--secondary-color);
}

/* 代码预览 */
pre {
    background-color: #0d1117;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
}

/* --- 使用方法区域 --- */
.usage-steps {
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
}

.step-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: var(--background-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step-content h4 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--text-muted-color);
    margin-bottom: 1rem;
}

/* --- 页脚 --- */
.footer {
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted-color);
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* --- 自定义Emoji表单 --- */
.custom-emoji-form {
    display: flex;
    gap: 0.75rem;
    max-width: 400px;
}

#custom-emoji-input {
    flex-grow: 1;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem 1rem;
    color: var(--text-color);
    font-family: var(--font-family);
    font-size: 1rem;
}

#custom-emoji-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

#apply-custom-emoji {
    flex-shrink: 0;
    background: var(--primary-color);
    color: var(--background-color);
    border: none;
}

/* --- 响应式设计 --- */
@media (max-width: 768px) {
    .hero-title {
        font-size: 3rem;
    }

    .container {
        padding: 0 1rem;
    }

    main > section {
        padding: 3rem 0;
    }
}