/* ============================================
   基础样式 - 变量、重置、全局
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", "PingFang SC", sans-serif;
}

:root {
    --primary-color: #0066cc;
    --primary-light: #e8f3ff;
    --secondary-color: #ff6600;
    --dark-color: #333333;
    --light-color: #ffffff;
    --gray-color: #f5f7fa;
    --gray-dark: #e0e4e9;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 15px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 24px;
}

body {
    color: var(--dark-color);
    line-height: 1.7;
    background-color: var(--light-color);
    transition: all 0.3s ease;
    position: relative;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

section {
    padding: 20px 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
    font-size: 36px;
    color: var(--primary-color);
    font-weight: 700;
    position: relative;
}

.section-title::after {
    content: "";
    display: block;
    width: 80px;
    height: 4px;
    background-color: var(--secondary-color);
    margin: 20px auto 0;
    border-radius: 2px;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    background-color: var(--secondary-color);
    color: var(--light-color);
    border: none;
    border-radius: 40px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    background-color: #e55c00;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}