/* -------- 页面标题区 -------- */
.page-header {
    background: linear-gradient(135deg, #f0f4fa 0%, #e6edf6 100%);
    padding: 3.5rem 0 3rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}
.page-header h1 {
    font-weight: 700;
    color: #0b1a33;
    font-size: 2.4rem;
}
.page-header .lead {
    color: #4b5a6a;
    font-size: 1.15rem;
    max-width: 680px;
    margin: 0 auto;
}

/* -------- 主内容 -------- */
.quickstart-section {
    padding: 3rem 0 4rem;
}
.step-card {
    background: #ffffff;
    border-radius: 1.2rem;
    padding: 2rem 2rem 2.2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    border: 1px solid #eef2f8;
    transition: all 0.3s ease;
    height: 100%;
}
.step-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 36px rgba(0, 106, 205, 0.07);
    border-color: rgba(0, 106, 205, 0.12);
}
.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #006ACD;
    color: #fff;
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    flex-shrink: 0;
}
.step-card h4 {
    font-weight: 600;
    color: #0b1a33;
    margin-bottom: 0.5rem;
}
.step-card p {
    color: #6c7a8a;
    font-size: 0.95rem;
    line-height: 1.7;
}
.step-card .step-icon {
    font-size: 2.2rem;
    color: #006ACD;
    opacity: 0.3;
    margin-bottom: 0.5rem;
}

/* -------- 代码示例区 -------- */
.code-section {
    background: #ffffff;
    border-radius: 1.2rem;
    padding: 2rem 2rem 1.8rem;
    border: 1px solid #eef2f8;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    margin-top: 1.5rem;
}
.code-section .nav-tabs .nav-link {
    color: #6c7a8a;
    font-weight: 500;
    border: none;
    border-bottom: 3px solid transparent;
    padding: 0.5rem 1.2rem 0.5rem 0;
    margin-right: 1.5rem;
    background: transparent;
    border-radius: 0;
}
.code-section .nav-tabs .nav-link.active {
    color: #006ACD;
    background: transparent;
    border-bottom-color: #006ACD;
}
.code-section .nav-tabs .nav-link:hover {
    color: #006ACD;
    border-bottom-color: rgba(0, 106, 205, 0.3);
}
.code-block {
    background: #1e293b;
    border-radius: 0.8rem;
    padding: 1.4rem 1.6rem;
    color: #e2e8f0;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
    position: relative;
}
.code-block .comment {
    color: #94a3b8;
}
.code-block .keyword {
    color: #f472b6;
}
.code-block .string {
    color: #a3e635;
}
.code-block .function {
    color: #60a5fa;
}
.code-block .variable {
    color: #fbbf24;
}
.code-block .number {
    color: #f472b6;
}
.code-block .operator {
    color: #c084fc;
}
.copy-btn {
    position: absolute;
    top: 0.6rem;
    right: 0.8rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #94a3b8;
    padding: 0.2rem 0.8rem;
    border-radius: 4px;
    font-size: 0.75rem;
    transition: all 0.2s;
    cursor: pointer;
}
.copy-btn:hover {
    background: rgba(255, 255, 255, 0.16);
    color: #e2e8f0;
}

/* -------- 注意事项 -------- */
.tips-box {
    background: #f8faff;
    border-radius: 1rem;
    padding: 1.6rem 2rem;
    border-left: 4px solid #006ACD;
    margin-top: 2rem;
}
.tips-box h6 {
    font-weight: 600;
    color: #0b1a33;
}
.tips-box ul {
    padding-left: 1.2rem;
    margin-bottom: 0;
}
.tips-box ul li {
    color: #4b5a6a;
    font-size: 0.92rem;
    line-height: 1.8;
}
.tips-box ul li i {
    color: #006ACD;
    margin-right: 6px;
}