:root {
    --primary: #6366f1;
    --secondary: #ec4899;
    --bg: #ffffff;
    --text: #1f2937;
    --nav-height: 60px;
}

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui;
}

body {
    background: var(--bg);
    color: var(--text);
    transition: background 0.3s;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.logo {
    font-weight: 700;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text; /* 添加标准属性 */
    -webkit-text-fill-color: transparent;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    animation: flow 2s infinite;
}

/* 全屏英雄区 */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding-top: var(--nav-height);
    background: linear-gradient(45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
    will-change: background-position;
    transform: translate3d(0,0,0);
}

.card:hover {
    transform: translateY(-10px) rotateX(10deg) scale(1.02) translateZ(10px);
}

@keyframes gradient {
    0% { 
        background-position: 0% 50%;
        transform: translate3d(0,0,0);
    }
    50% { 
        background-position: 100% 50%; 
    }
    100% { 
        background-position: 0% 50%;
        transform: translate3d(0,0,0);
    }
}
.hero h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    color: white;
    font-size: 1.2rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    width: 40px;
    height: 40px;
    border: 2px solid white;
    border-radius: 50%;
    animation: bounce 2s infinite;
}

/* 分屏布局 */
.split-section {
    display: flex;
    min-height: 80vh;
    padding: 4rem 2rem;
}

.split-section > div {
    flex: 1;
    padding: 2rem;
}

.split-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 1rem;
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.split-image:hover {
    transform: rotate(0deg) scale(1.05);
}

/* 作品区 */
.work-section {
    padding: 4rem 2rem;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--primary);
    margin: 1rem auto;
    border-radius: 2px;
}

/* 卡片网格 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    touch-action: manipulation;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.card:active,
.card:hover {
    transform: scale(0.98);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

@media (hover: none) {
    .card {
        transition: transform 0.1s ease;
    }
    .card:active {
        transform: scale(0.96);
    }
}

.card {
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-10px) rotateX(10deg) scale(1.02);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.card:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.card img {
    background: linear-gradient(135deg, #f0f2f5 25%, #e5e8ec 50%, #f0f2f5 75%);
    background-size: 400% 400%;
    animation: placeholderShimmer 2s linear infinite;
}

@keyframes placeholderShimmer {
    0% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 0.5rem;
}

/* 工具推荐区 */
.tool-section {
    padding: 4rem 2rem;
    background: #f8fafc;
}

.tool-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.tool-button {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border-radius: 1rem;
    text-decoration: none;
    color: var(--text);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.tool-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.tool-icon {
    font-size: 2rem;
}

/* 关于区 */
.about-section {
    background: linear-gradient(to bottom right, #f8fafc, #ffffff);
    padding: 4rem 0;
}

.profile-container {
    position: relative;
}

.skill-bubbles {
    position: absolute;
    bottom: -30px;
    left: 20px;
    display: flex;
    gap: 1rem;
}

.bubble {
    background: var(--primary);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 2rem;
    animation: float 3s ease-in-out infinite;
    animation-delay: calc(var(--delay) * 1s);
}

.timeline {
    margin-top: 2rem;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    height: 100%;
    width: 2px;
    background: var(--primary);
}

.timeline-item {
    margin: 2rem 0;
    padding-left: 3rem;
    position: relative;
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.5s ease;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    width: 20px;
    height: 20px;
    background: white;
    border: 3px solid var(--primary);
    border-radius: 50%;
}

/* 页脚 */
footer {
    background: var(--text);
    color: white;
    text-align: center;
    padding: 2rem;
}

/* 动画 */
@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

@keyframes flow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .split-section {
        flex-direction: column;
    }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        right: -100%;
        width: 80%;
        height: calc(100vh - var(--nav-height));
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        transition: right 0.3s ease;
        padding: 1rem;
    }

    .nav-links.active {
        right: 0;
    }

    /* 添加汉堡菜单图标 */
    .hamburger {
        display: block;
        width: 30px;
        height: 20px;
        position: relative;
        cursor: pointer;
    }

    .hamburger span {
        position: absolute;
        height: 3px;
        width: 100%;
        background: var(--text);
        transition: all 0.3s ease;
    }

    .hamburger span:nth-child(1) { top: 0; }
    .hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
    .hamburger span:nth-child(3) { bottom: 0; }

    .hamburger.active span {
        transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    }
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate3d(5px, 6px, 0);
    }
    .hamburger.active span:nth-child(2) {
        opacity: 0;
        transform: translateX(-10px);
    }
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate3d(5px, -6px, 0);
    }

    .nav-links {
        transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.3s ease;
        transform: translate3d(120%, 0, 0);
        opacity: 0;
    }

    .nav-links.active {
        transform: translate3d(0, 0, 0);
        opacity: 1;
    }

    .nav-link {
        opacity: 0;
        transform: translate3d(20px, 0, 0);
        transition: all 0.4s ease;
    }

    .nav-links.active .nav-link {
        opacity: 1;
        transform: translate3d(0, 0, 0);
        transition-delay: calc(0.1s * var(--i));
    }


    .card-grid,
    .tool-buttons {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 2rem;
    }

    .skill-bubbles {
        position: static;
        flex-wrap: wrap;
        margin-top: 2rem;
    }
}

/* 在原有样式基础上添加以下内容 */

/* 作品区卡片响应式布局 */
.card-grid {
    display: grid;
    gap: 2rem;
    padding: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    justify-content: center;
}

@media (min-width: 768px) {
    .card-grid {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    }
}

@media (min-width: 1024px) {
    .card-grid {
        grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    }
}

@media (max-width: 768px) {
    .card-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1.5rem;
        padding: 1rem;
    }

    .card {
        padding: 1rem;
    }

    .card img {
        height: 150px; /* 缩小图片高度 */
    }

    .card h3 {
        font-size: 1.2rem; /* 缩小标题字体 */
    }

    .card p {
        font-size: 0.9rem; /* 缩小描述字体 */
    }
}

@media (max-width: 480px) {
    .card-grid {
        grid-template-columns: 1fr; /* 单列布局 */
        gap: 1rem;
    }

    .card img {
        height: 120px; /* 进一步缩小图片高度 */
    }

    .card h3 {
        font-size: 1.1rem;
    }

    .card p {
        font-size: 0.85rem;
    }
}

/* 工具推荐区响应式布局 */
.tool-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .tool-buttons {
        grid-template-columns: 1fr; /* 单列布局 */
        gap: 1rem;
    }

    .tool-button {
        padding: 1rem; /* 缩小按钮内边距 */
    }

    .tool-icon {
        font-size: 1.5rem; /* 缩小图标 */
    }

    .tool-button h3 {
        font-size: 1.1rem; /* 缩小标题 */
    }

    .tool-button p {
        font-size: 0.9rem; /* 缩小描述 */
    }
}

/* 分屏布局响应式调整 */
.split-section {
    display: flex;
    min-height: 80vh;
    padding: 4rem 2rem;
}

@media (max-width: 768px) {
    .split-section {
        flex-direction: column; /* 垂直堆叠 */
        padding: 2rem 1rem;
    }

    .split-section > div {
        padding: 1rem;
    }

    .split-image {
        height: 300px; /* 缩小图片高度 */
        border-radius: 0.5rem; /* 调整圆角 */
    }

    .tool-section .split-section {
        padding: 2rem 0;
    }
}

@media (max-width: 480px) {
    .split-image {
        height: 250px; /* 进一步缩小图片高度 */
    }

    .section-title {
        font-size: 1.8rem; /* 缩小标题字体 */
    }
}