/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #111827;
    background-color: #fff;
}

/* 容器 */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 640px) {
    .container {
        padding: 0 1.5rem;
    }
}

/* 链接 */
a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: #374151;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
}

.btn-primary {
    background-color: #111827;
    color: #fff;
}

.btn-primary:hover {
    background-color: #1f2937;
}

.btn-outline {
    background-color: #fff;
    color: #111827;
    border: 1px solid #e5e7eb;
}

.btn-outline:hover {
    background-color: #f9fafb;
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1rem;
}

/* 标签 */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
    background-color: #f3f4f6;
    color: #374151;
}

/* 卡片 */
.card {
    background: #fff;
    border-radius: 0.5rem;
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.card:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* 文章内容 */
.prose {
    color: #374151;
    line-height: 1.75;
}

.prose h1 { font-size: 1.875rem; font-weight: 700; margin-bottom: 1rem; color: #111827; }
.prose h2 { font-size: 1.5rem; font-weight: 600; margin-top: 2rem; margin-bottom: 1rem; color: #111827; }
.prose h3 { font-size: 1.25rem; font-weight: 600; margin-top: 1.5rem; margin-bottom: 0.75rem; color: #111827; }
.prose p { margin-bottom: 1.25rem; }
.prose ul, .prose ol { padding-left: 1.5rem; margin-bottom: 1.25rem; }
.prose li { margin-bottom: 0.5rem; }
.prose img { max-width: 100%; height: auto; border-radius: 0.5rem; margin: 1.5rem 0; }

/* 文本截断 */
.line-clamp-1 { display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.line-clamp-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.line-clamp-3 { display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }

/* 表单 */
input, textarea, select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    outline: none;
    transition: all 0.2s;
}

input:focus, textarea:focus, select:focus {
    border-color: #111827;
    box-shadow: 0 0 0 1px #111827;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: #111827;
    margin-bottom: 0.5rem;
}

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: #f1f1f1; }
::-webkit-scrollbar-thumb { background: #c1c1c1; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #a8a8a8; }

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}