/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #1a1a2e;
    background: #fafafa;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 56px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 48px;
    height: 4px;
    background: #5b5ea6;
    border-radius: 2px;
    margin: 16px auto 0;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 250, 250, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: box-shadow 0.3s;
}

.navbar.scrolled {
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: #5b5ea6;
    letter-spacing: -1px;
}

.nav-menu {
    display: flex;
    gap: 36px;
}

.nav-menu a {
    font-size: 0.95rem;
    font-weight: 500;
    color: #555;
    transition: color 0.2s;
}

.nav-menu a:hover {
    color: #5b5ea6;
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 24px;
    background: linear-gradient(160deg, #f0f0f8 0%, #fafafa 50%, #f0f0f8 100%);
}

.hero-greeting {
    font-size: 1.15rem;
    color: #888;
    margin-bottom: 8px;
}

.hero-name {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -2px;
    color: #1a1a2e;
    margin-bottom: 8px;
}

.hero-title {
    font-size: 1.5rem;
    font-weight: 500;
    color: #5b5ea6;
    margin-bottom: 12px;
}

.hero-desc {
    font-size: 1.05rem;
    color: #777;
    margin-bottom: 40px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.25s;
    cursor: pointer;
}

.btn-primary {
    background: #5b5ea6;
    color: #fff;
}

.btn-primary:hover {
    background: #4a4d8c;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(91, 94, 166, 0.35);
}

.btn-outline {
    border: 2px solid #5b5ea6;
    color: #5b5ea6;
}

.btn-outline:hover {
    background: #5b5ea6;
    color: #fff;
    transform: translateY(-1px);
}

/* ===== About ===== */
.about-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: start;
}

.about-text p {
    color: #555;
    margin-bottom: 16px;
    font-size: 0.98rem;
}

.about-info {
    display: flex;
    flex-direction: column;
    gap: 18px;
    padding: 32px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding-bottom: 14px;
    border-bottom: 1px solid #f0f0f0;
}

.info-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.info-label {
    font-weight: 600;
    color: #333;
}

.info-value {
    color: #777;
}

/* ===== Skills ===== */
.skills {
    background: #fff;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.skill-category {
    padding: 32px;
    border-radius: 12px;
    border: 1px solid #eee;
    transition: border-color 0.25s, box-shadow 0.25s;
}

.skill-category:hover {
    border-color: #d0d0f0;
    box-shadow: 0 4px 20px rgba(91, 94, 166, 0.06);
}

.skill-category h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 18px;
    color: #1a1a2e;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tags span {
    padding: 6px 14px;
    background: #f0f0f8;
    color: #5b5ea6;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===== Projects ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.project-card {
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s, box-shadow 0.3s;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.project-image {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: 4px;
}

.project-info {
    padding: 22px;
}

.project-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #1a1a2e;
}

.project-info p {
    font-size: 0.9rem;
    color: #777;
    margin-bottom: 14px;
    line-height: 1.5;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.project-tech span {
    padding: 4px 10px;
    background: #f0f0f8;
    color: #5b5ea6;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* ===== Contact ===== */
.contact {
    background: #fff;
}

.contact-subtitle {
    text-align: center;
    color: #777;
    margin-bottom: 40px;
    margin-top: -32px;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 28px;
    border-radius: 10px;
    border: 1px solid #eee;
    color: #555;
    transition: all 0.25s;
}

.contact-link:hover {
    border-color: #5b5ea6;
    color: #5b5ea6;
    box-shadow: 0 4px 16px rgba(91, 94, 166, 0.1);
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 32px 24px;
    color: #999;
    font-size: 0.88rem;
    border-top: 1px solid #eee;
    background: #fafafa;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .hero-name {
        font-size: 2.5rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 72px 0;
    }

    .nav-menu {
        gap: 20px;
    }
}