/* --- 全局设定 & Heo Design System --- */
:root {
    --c-bg: #f7f7f7;
    --c-fg: #ffffff;
    --c-text: #333333;
    --c-text-light: #777777;
    --c-accent: #6366f1;
    --c-accent-light: #818cf8;
    --c-accent-dark: #4f46e5;
    --c-border: #eeeeee;
    --c-shadow: rgba(0, 0, 0, 0.05);
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --radius: 12px;
    --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

html.dark {
    --c-bg: #1a1a1a;
    --c-fg: #242424;
    --c-text: #e0e0e0;
    --c-text-light: #999999;
    --c-border: #333333;
    --c-shadow: rgba(255, 255, 255, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--c-text);
    background-color: var(--c-bg);
    line-height: 1.8;
    font-weight: 400;
    /* cursor: none;  Hide default cursor */
}

.container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- 自定义光标 --- */
/* .cursor, .cursor-follower {
    position: fixed;
    top: 0;
    left: 0;
    pointer-events: none;
    border-radius: 50%;
    z-index: 9999;
}
.cursor {
    width: 8px;
    height: 8px;
    background-color: var(--c-accent);
    transition: transform 0.1s ease-out;
}
.cursor-follower {
    width: 30px;
    height: 30px;
    border: 1px solid var(--c-accent);
    transition: transform 0.3s ease-out, background-color 0.3s, border-color 0.3s;
}
.cursor.active {
    opacity: 0;
}
.cursor-follower.active {
    transform-origin: center;
    transform: scale(1.5);
    background-color: rgba(99, 102, 241, 0.2);
    border-color: transparent;
} */


/* --- 交互动效 --- */
.content-section {
    /* opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--transition), transform 0.8s var(--transition); */
}
/* .content-section.visible {
    opacity: 1;
    transform: translateY(0);
} */
.link-effect {
    transition: transform var(--transition), box-shadow var(--transition);
}
.link-effect:hover {
    transform: translateY(-4px);
}


/* --- 头部导航 --- */
header {
    position: fixed;
    top: 20px;
    left: 0;
    width: 100%;
    z-index: 1000;
}

header nav.container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 0 20px 0 30px;
    box-shadow: 0 4px 20px var(--c-shadow);
    transition: background-color var(--transition), border-color var(--transition);
}

html.dark header nav.container {
    background-color: rgba(36, 36, 36, 0.8);
}

header .logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--c-text);
    text-decoration: none;
}

header ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

header ul li a {
    text-decoration: none;
    color: var(--c-text-light);
    font-weight: 500;
    transition: color var(--transition);
    font-size: 1rem;
}
header ul li a:hover {
    color: var(--c-text);
}

header ul li a.active {
    color: var(--c-accent);
    font-weight: 700;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.menu-toggle {
    display: none;
}

#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-text-light);
    transition: color var(--transition);
}

#theme-toggle:hover {
    color: var(--c-text);
}

#theme-toggle .sun { display: none; }
#theme-toggle .moon { display: block; }
html.dark #theme-toggle .sun { display: block; }
html.dark #theme-toggle .moon { display: none; }


/* --- Hero区域 --- */
.hero {
    text-align: center;
    padding: 180px 0 120px;
    background-color: var(--c-bg);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--c-text);
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    max-width: 650px;
    margin: 0 auto 2.5rem;
    color: var(--c-text-light);
}

.cta-button {
    display: inline-block;
    background: linear-gradient(45deg, var(--c-accent-light), var(--c-accent));
    color: var(--c-fg);
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.3);
}
.cta-button:hover {
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

/* --- 内容区域 --- */
.content-section {
    padding: 80px 0;
}
.section-title {
    font-size: 2.5rem;
    margin-bottom: 4rem;
    color: var(--c-text);
    font-weight: 700;
}
.bg-light {
    background-color: var(--c-fg);
}

/* --- 关于我 --- */
.about-container {
    display: flex;
    align-items: center;
    gap: 80px;
}
.about-text {
    flex: 1;
}
.about-text .section-title {
    text-align: left;
}
.about-text p {
    margin-bottom: 1.5em;
    font-size: 1.1rem;
    color: var(--c-text-light);
}
.about-image {
    flex: 0 0 300px;
    border-radius: 50%;
    padding: 10px; /* 添加一些内边距 */
    transition: background-color var(--transition);
}
.about-image img {
    width: 100%;
    border-radius: 50%;
    box-shadow: 0 10px 30px var(--c-shadow);
    display: block; /* 修正图片对齐问题 */
}


/* --- 专业技能 --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.skill-card {
    background-color: var(--c-fg);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 30px;
    text-align: left;
    transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.skill-card:hover {
    border-color: var(--c-accent-light);
    box-shadow: 0 8px 25px var(--c-shadow);
}
.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--c-accent);
    color: var(--c-fg);
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}
.skill-card h3 {
    color: var(--c-text);
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
    font-weight: 500;
}
.skill-card p {
    color: var(--c-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}


/* --- 作品集 --- */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.portfolio-card {
    background-color: var(--c-fg);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--c-border);
    text-decoration: none;
    display: block;
    transition: background-color var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.portfolio-card:hover {
    box-shadow: 0 15px 30px var(--c-shadow);
}
.portfolio-image {
    height: 200px;
    background-size: cover;
    background-position: center;
    transition: transform 0.5s var(--transition);
}
.portfolio-card:hover .portfolio-image {
    transform: scale(1.05);
}

.portfolio-grid .portfolio-card:nth-of-type(1) .portfolio-image {
    background-image: url('../images/site1.png');
}
.portfolio-grid .portfolio-card:nth-of-type(2) .portfolio-image {
    background-image: url('../images/site2.png');
}
.portfolio-grid .portfolio-card:nth-of-type(3) .portfolio-image {
    background-image: url('../images/site3.png');
}

.portfolio-info {
    padding: 25px;
}
.portfolio-category {
    display: inline-block;
    background-color: var(--c-accent-light);
    color: var(--c-fg);
    padding: 4px 10px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 1rem;
}
.portfolio-info h3 {
    font-size: 1.3rem;
    color: var(--c-text);
    margin-bottom: 0.5rem;
    font-weight: 500;
}
.portfolio-info p {
    color: var(--c-text-light);
    font-size: 0.95rem;
}


/* --- 联系方式 --- */
.contact-container {
    text-align: center;
    padding: 80px 0;
}
.contact-container .section-title {
    margin-bottom: 1.5rem;
}
.contact-container p {
    color: var(--c-text-light);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}


/* --- 页脚 --- */
footer {
    padding: 40px 0;
    border-top: 1px solid var(--c-border);
    background-color: var(--c-fg);
    transition: background-color var(--transition), border-color var(--transition);
}
.footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--c-text-light);
    font-size: 0.9rem;
}
.footer-info {
    text-align: right;
}
.footer-info .copyright {
    margin-bottom: 0;
}
.footer-info a {
    color: var(--c-text-light);
    text-decoration: none;
    transition: color var(--transition);
}
.footer-info a:hover {
    color: var(--c-accent);
}
.social-links {
    display: flex;
    gap: 15px;
}
.social-links a {
    color: var(--c-text-light);
}
.social-links a:hover {
    color: var(--c-accent);
    transform: translateY(-2px);
}
.social-links svg {
    width: 20px;
    height: 20px;
}

/* --- 响应式设计 --- */

/* 平板设备 (768px - 1023px) */
@media (max-width: 1023px) {
    .container {
        padding: 0 20px;
    }
    header nav.container {
        padding: 0 20px;
    }
    .hero-title {
        font-size: 3rem;
    }
    .about-container {
        flex-direction: column;
        text-align: center;
    }
    .about-text .section-title {
        text-align: center;
    }
    .about-image {
        margin-bottom: 2rem;
        max-width: 250px;
    }
    .skills-grid, .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 移动设备 (320px - 767px) */
@media (max-width: 767px) {
    /* body {
        cursor: auto; 
    }
    .cursor, .cursor-follower {
        display: none; 
    } */
    header {
        top: 0;
        border-radius: 0;
    }
    header nav.container {
        position: relative;
        border-radius: 0;
    }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--c-border);
        padding: 1rem 0;
        transition: background-color var(--transition), border-color var(--transition);
    }
    html.dark .nav-links {
        background-color: rgba(36, 36, 36, 0.95);
    }
    .nav-links.active {
        display: block;
    }
    .nav-links ul {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    .menu-toggle {
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        width: 24px;
        height: 24px;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 0;
        z-index: 10;
    }
    .menu-icon {
        width: 24px;
        height: 2px;
        background-color: var(--c-text);
        border-radius: 2px;
        transition: all 0.3s linear;
        position: relative;
        transform-origin: 1px;
    }
    .menu-icon::before, .menu-icon::after {
        content: '';
        position: absolute;
        width: 24px;
        height: 2px;
        background-color: var(--c-text);
        border-radius: 2px;
        transition: all 0.3s linear;
    }
    .menu-icon::before {
        transform: translateY(-8px);
    }
    .menu-icon::after {
        transform: translateY(8px);
    }
    .menu-toggle.active .menu-icon {
        background-color: transparent;
    }
    .menu-toggle.active .menu-icon::before {
        transform: rotate(45deg);
    }
    .menu-toggle.active .menu-icon::after {
        transform: rotate(-45deg);
    }

    .hero {
        padding: 120px 0 80px;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-subtitle {
        font-size: 1.1rem;
    }
    .hero .cta-button {
        margin: 0.5rem;
    }
    .section-title {
        font-size: 2rem;
        margin-bottom: 2.5rem;
    }
    .skills-grid, .portfolio-grid {
        grid-template-columns: 1fr;
    }
    .footer-container {
        flex-direction: column-reverse;
        gap: 1rem;
    }
    .footer-info {
        text-align: center;
    }
}