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

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    line-height: 1.9;
    color: #e0e0e0;
    background: #0a0a0f;
    min-height: 100vh;
}

/* 导航栏 */
header {
    background: rgba(10, 10, 20, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 195, 255, 0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    font-size: 1.6rem;
    font-weight: 700;
    color: #00c3ff;
    text-decoration: none;
    letter-spacing: 1px;
}

.logo span {
    color: #ff6b35;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-links a {
    text-decoration: none;
    color: #a0a0a0;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.3s;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
}

.nav-links a:hover {
    color: #00c3ff;
    border-bottom-color: #00c3ff;
}

.nav-links a.active {
    color: #00c3ff;
    border-bottom-color: #00c3ff;
}

/* 移动端菜单 */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: #00c3ff;
    transition: 0.3s;
}

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

/* 内容卡片 */
.content-card {
    background: linear-gradient(145deg, #12121a, #0d0d15);
    border: 1px solid rgba(0, 195, 255, 0.15);
    border-radius: 4px;
    padding: 2.5rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.content-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #00c3ff, #ff6b35);
}

/* 标题样式 */
h1 {
    font-size: 2.2rem;
    color: #00c3ff;
    margin-bottom: 1.5rem;
    font-weight: 600;
    line-height: 1.4;
}

h2 {
    font-size: 1.6rem;
    color: #fff;
    margin: 2rem 0 1.2rem;
    padding-left: 1rem;
    border-left: 3px solid #ff6b35;
}

h3 {
    font-size: 1.2rem;
    color: #00c3ff;
    margin: 1.5rem 0 0.8rem;
}

/* 段落样式 */
p {
    margin-bottom: 1rem;
    color: #c0c0c0;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: transparent;
    color: #00c3ff;
    text-decoration: none;
    border: 2px solid #00c3ff;
    border-radius: 4px;
    font-weight: 600;
    transition: all 0.3s;
    margin: 0.5rem;
}

.btn:hover {
    background: #00c3ff;
    color: #0a0a0f;
    box-shadow: 0 0 20px rgba(0, 195, 255, 0.4);
}

.btn-secondary {
    border-color: #ff6b35;
    color: #ff6b35;
}

.btn-secondary:hover {
    background: #ff6b35;
    color: #0a0a0f;
    box-shadow: 0 0 20px rgba(255, 107, 53, 0.4);
}

/* 特色网格 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.feature-card {
    background: rgba(0, 195, 255, 0.03);
    border: 1px solid rgba(0, 195, 255, 0.1);
    padding: 1.8rem;
    border-radius: 4px;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: #00c3ff;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 195, 255, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* 下载卡片 */
.download-card {
    background: rgba(255, 107, 53, 0.05);
    border: 1px solid rgba(255, 107, 53, 0.2);
    border-left: 3px solid #ff6b35;
    padding: 1.5rem;
    margin: 1rem 0;
    border-radius: 0 4px 4px 0;
}

.download-link {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    background: #ff6b35;
    color: #0a0a0f;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 600;
    margin-top: 0.8rem;
    transition: all 0.3s;
}

.download-link:hover {
    background: #ff8c5a;
    box-shadow: 0 0 15px rgba(255, 107, 53, 0.4);
}

/* 列表样式 */
ul, ol {
    margin: 1rem 0 1rem 1.5rem;
    color: #c0c0c0;
}

li {
    margin-bottom: 0.5rem;
}

/* 页脚 */
footer {
    background: #08080c;
    border-top: 1px solid rgba(0, 195, 255, 0.1);
    color: #808080;
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

footer a {
    color: #00c3ff;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* 面包屑导航 */
.breadcrumb {
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: #808080;
}

.breadcrumb a {
    color: #00c3ff;
    text-decoration: none;
}

.breadcrumb span {
    margin: 0 0.5rem;
}

/* Hero区域 */
.hero {
    background: linear-gradient(135deg, #0d0d15 0%, #12121a 100%);
    border: 1px solid rgba(0, 195, 255, 0.2);
    border-radius: 4px;
    padding: 3rem 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto 1.5rem;
}

/* 统计 */
.stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
    margin: 2rem 0;
    padding: 2rem 0;
    border-top: 1px solid rgba(0, 195, 255, 0.1);
    border-bottom: 1px solid rgba(0, 195, 255, 0.1);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #00c3ff;
    display: block;
}

.stat-label {
    color: #808080;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* 步骤 */
.step {
    display: flex;
    align-items: flex-start;
    margin: 1.5rem 0;
    padding: 1.2rem;
    background: rgba(0, 195, 255, 0.03);
    border-radius: 4px;
}

.step-number {
    background: linear-gradient(135deg, #00c3ff, #0088cc);
    color: #0a0a0f;
    min-width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-right: 1.2rem;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

/* 表单 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #00c3ff;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.8rem;
    background: #12121a;
    border: 1px solid rgba(0, 195, 255, 0.2);
    border-radius: 4px;
    color: #e0e0e0;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #00c3ff;
    box-shadow: 0 0 10px rgba(0, 195, 255, 0.2);
}

/* 警告框 */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 4px;
    margin: 1.5rem 0;
}

.alert-info {
    background: rgba(0, 195, 255, 0.1);
    border-left: 3px solid #00c3ff;
    color: #00c3ff;
}

.alert-warning {
    background: rgba(255, 107, 53, 0.1);
    border-left: 3px solid #ff6b35;
    color: #ff6b35;
}

/* 关键词高亮 */
.keyword {
    color: #00c3ff;
    font-weight: 600;
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 10, 20, 0.98);
        padding: 1rem;
        border-bottom: 1px solid rgba(0, 195, 255, 0.2);
    }

    .nav-links.active {
        display: flex;
    }

    .menu-toggle {
        display: flex;
    }

    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.4rem;
    }

    .content-card {
        padding: 1.5rem;
    }

    .container {
        padding: 1rem;
    }

    .hero {
        padding: 2rem 1.5rem;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .stats {
        gap: 2rem;
    }
}