:root {
    --primary-color: #2196f3;
    --secondary-color: #ffffff;
    --text-color: #333333;
    --nav-height: 60px;
    --section-padding: 80px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: #f5f5f5;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--secondary-color);
    height: var(--nav-height);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 20px;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
    background-color: rgba(33, 150, 243, 0.1);
}

.nav-links i {
    margin-right: 5px;
}

/* 首页英雄区样式 */
.hero {
    padding-top: calc(var(--nav-height) + 40px);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    margin-bottom: 20px;
    object-fit: cover;
    border: 4px solid var(--secondary-color);
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background-color: #fff;
}

.profile-image:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 24px rgba(0,0,0,0.15);
}

/* 技能卡片样式 */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    padding: 20px;
}

.skill-card {
    background: var(--secondary-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center;
}

.skill-card i {
    font-size: 3em;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.skill-level {
    background-color: #f0f0f0;
    height: 8px;
    border-radius: 4px;
    margin-top: 10px;
}

.skill-bar {
    height: 100%;
    background-color: var(--primary-color);
    border-radius: 4px;
    transition: width 1s ease-in-out;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hamburger {
        display: block;
        cursor: pointer;
    }

    .hamburger span {
        display: block;
        width: 25px;
        height: 3px;
        background-color: var(--text-color);
        margin: 5px 0;
        transition: all 0.3s ease;
    }
}

/* 动画类 */
.typing-text {
    border-right: 2px solid var(--primary-color);
    white-space: nowrap;
    overflow: hidden;
    animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from { width: 0 }
    to { width: 100% }
}

@keyframes blink-caret {
    from, to { border-color: transparent }
    50% { border-color: var(--primary-color) }
}

/* 座右铭样式 */
.motto-content {
    text-align: center;
    padding: 40px 0;
}

.motto-text {
    font-size: 2.5em;
    font-weight: bold;
    color: var(--primary-color);
    letter-spacing: 4px;
    animation: fadeIn 2s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.pixiv-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
    vertical-align: middle;
}

.social-icon {
    color: var(--text-color);
    font-size: 24px;
    margin: 0 10px;
    transition: color 0.3s ease;
}

.social-icon:hover {
    color: var(--primary-color);
}