.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    /* 隐藏光标 */
    caret-color: transparent;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: rgba(var(--md-sys-color-surface-rgb), 0.7);
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    transition: background-color var(--transition-medium);
    backdrop-filter: blur(180px);
    -webkit-backdrop-filter: blur(180px);
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--md-sys-color-primary);
    font-weight: 600;
    font-size: var(--md-sys-typescale-title-medium);
    flex-shrink: 0;
}

.logo-text {
    display: inline-block;
    transition: color var(--transition-fast);
}

.nav-logo:hover .logo-text {
    color: var(--md-sys-color-on-surface);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    margin-right: 16px;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    text-decoration: none;
    color: var(--md-sys-color-on-surface-variant);
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 600;
    border-radius: var(--md-sys-shape-corner-full);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background-color: var(--md-sys-color-surface-variant);
    color: var(--md-sys-color-on-surface);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.mobile-menu-toggle {
    display: none;
}

.mobile-nav {
    display: none;
    flex-direction: column;
    background-color: var(--md-sys-color-surface);
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.3s ease;
}

.mobile-nav.open {
    max-height: 300px;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    padding: 16px 24px;
    text-decoration: none;
    color: var(--md-sys-color-on-surface-variant);
    font-size: var(--md-sys-typescale-label-large);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.mobile-nav-link:hover {
    background-color: var(--md-sys-color-surface-variant);
    color: var(--md-sys-color-on-surface);
}

.main-content {
    flex: 1;
    padding-top: 64px;
}

.hero-section {
    min-height: calc(100vh - 64px);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 48px 24px;
    background: linear-gradient(0deg, var(--md-sys-color-surface-container-low) 0%, var(--md-sys-color-background) 100%);
}

.hero-section.has-bg-image {
    background: var(--md-sys-color-background);
    position: relative;
}

.hero-section.has-bg-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.15;
    z-index: 0;
}

.hero-content {
    text-align: left;
    max-width: 680px;
    width: 100%;
    padding-left: 15%;
    padding-right: 24px;
    animation: fadeIn var(--md-sys-motion-duration-long2) var(--md-sys-motion-easing-emphasized-decelerate);
    position: relative;
    z-index: 1;
}

.hero-content > * {
    max-width: 560px;
}

.avatar-container {
    margin-bottom: 32px;
    display: flex;
    justify-content: flex-start;
}

.avatar {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: transform var(--transition-medium), border-radius var(--transition-medium);
    box-shadow: var(--md-sys-elevation-2);
}

.avatar:hover {
    transform: scale(1.05);
    border-radius: 20px;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar .material-icons-round {
    font-size: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-title {
    font-size: var(--md-sys-typescale-display-small);
    font-weight: 600;
    color: var(--md-sys-color-on-background);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: var(--md-sys-typescale-title-large);
    color: var(--md-sys-color-primary);
    font-weight: 600;
    margin-bottom: 16px;
}

.hero-description {
    font-size: var(--md-sys-typescale-body-large);
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: flex-start;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-width: 120px;
}

.hero-btn .material-icons-round {
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-social-links {
    display: flex;
    justify-content: flex-start;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background-color: var(--md-sys-color-surface-container);
    color: var(--md-sys-color-on-surface-variant);
    text-decoration: none;
    transition: transform 200ms cubic-bezier(0.4, 0, 0.2, 1),
                background-color 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-social-link:hover {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    transform: translateY(-4px);
}

.hero-social-link:active {
    transform: translateY(-2px) scale(0.95);
}

.hero-social-link .material-icons-round {
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.section {
    padding: 80px 24px;
}

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

.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: var(--md-sys-typescale-headline-medium);
    font-weight: 600;
    color: var(--md-sys-color-on-background);
    margin-bottom: 48px;
}

.section-title .material-icons-round {
    color: var(--md-sys-color-primary);
    font-size: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.projects-section {
    background-color: var(--md-sys-color-surface-container-low);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--card-gap);
}

.project-card {
    overflow: hidden;
    animation: fadeIn var(--md-sys-motion-duration-medium4) var(--md-sys-motion-easing-emphasized-decelerate);
    animation-fill-mode: both;
    display: flex;
    flex-direction: column;
    background-color: var(--md-sys-color-surface);
    border-radius: var(--md-sys-shape-corner-extra-large);
}

.project-card:nth-child(1) { animation-delay: 0ms; }
.project-card:nth-child(2) { animation-delay: 100ms; }
.project-card:nth-child(3) { animation-delay: 200ms; }
.project-card:nth-child(4) { animation-delay: 300ms; }

.project-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 24px;
}

.project-title {
    font-size: var(--md-sys-typescale-title-large);
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
    margin-bottom: 8px;
    line-height: 1.4;
}

.project-description {
    font-size: var(--md-sys-typescale-body-medium);
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 16px;
    line-height: 1.6;
    flex: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.project-tag {
    padding: 6px 12px;
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    border-radius: var(--md-sys-shape-corner-small);
    font-size: var(--md-sys-typescale-label-small);
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 12px;
    margin-top: auto;
}

.project-skeleton {
    height: 200px;
    border-radius: var(--md-sys-shape-corner-extra-large);
    background-color: var(--md-sys-color-surface-container);
}

.contact-section {
    background-color: var(--md-sys-color-surface-container-low);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--card-gap);
    max-width: 900px;
    margin: 0 auto;
}

.contact-info {
    padding: 24px;
    background-color: var(--md-sys-color-surface);
    border-radius: var(--md-sys-shape-corner-extra-large);
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    background-color: var(--md-sys-color-surface-container-low);
    border-radius: var(--md-sys-shape-corner-large);
    animation: slideIn var(--md-sys-motion-duration-medium4) var(--md-sys-motion-easing-emphasized-decelerate);
    animation-fill-mode: both;
    transition: transform 0.4s ease-in-out, box-shadow 0.4s ease-in-out;
}

.contact-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--md-sys-elevation-subtle);
}

.contact-item:active {
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-subtle);
}

.contact-item:nth-child(1) { animation-delay: 0ms; }
.contact-item:nth-child(2) { animation-delay: 100ms; }
.contact-item:nth-child(3) { animation-delay: 200ms; }

.contact-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: var(--md-sys-shape-corner-full);
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon .material-icons-round {
    font-size: var(--icon-size-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-text {
    flex: 1;
    min-width: 0;
}

.contact-label {
    font-size: var(--md-sys-typescale-label-medium);
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 2px;
}

.contact-value {
    font-size: var(--md-sys-typescale-body-large);
    color: var(--md-sys-color-on-surface);
    word-break: break-all;
}

.contact-skeleton {
    height: 64px;
    border-radius: var(--md-sys-shape-corner-large);
}

/* 地图容器样式 - 正方形，符合MD3规范 */
.map-container {
    width: 100%;
    aspect-ratio: 1 / 1;
    margin-top: 20px;
    border-radius: var(--md-sys-shape-corner-large);
    overflow: hidden;
    background-color: var(--md-sys-color-surface-container);
    transition: transform 0.4s ease-in-out, box-shadow 0.4s ease-in-out;
}

.map-container:hover {
    transform: translateY(-4px);
    box-shadow: var(--md-sys-elevation-subtle);
}

.map-container:active {
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-subtle);
}

.map-container .amap-container {
    border-radius: inherit;
}

.social-links-container {
    padding: 24px;
    background-color: var(--md-sys-color-surface);
    border-radius: var(--md-sys-shape-corner-extra-large);
}

.social-title {
    font-size: var(--md-sys-typescale-title-medium);
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.social-card {
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    color: var(--md-sys-color-on-surface);
    background-color: var(--md-sys-color-surface-container-low);
    border-radius: var(--md-sys-shape-corner-large);
    transition: transform 0.4s ease-in-out, box-shadow 0.4s ease-in-out;
}

.social-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--md-sys-elevation-subtle);
}

.social-card:active {
    transform: translateY(-2px);
    box-shadow: var(--md-sys-elevation-subtle);
}

.social-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: var(--md-sys-shape-corner-medium);
    background-color: var(--md-sys-color-tertiary-container);
    color: var(--md-sys-color-on-tertiary-container);
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-icon .material-icons-round {
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-icon svg {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-social-link svg {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-info {
    flex: 1;
    min-width: 0;
}

.social-name {
    font-size: var(--md-sys-typescale-title-small);
    font-weight: 500;
    color: var(--md-sys-color-on-surface);
}

.social-handle {
    font-size: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
}

.social-skeleton {
    height: 64px;
    border-radius: var(--md-sys-shape-corner-large);
}

.footer {
    background-color: var(--md-sys-color-surface-container);
    border-top: 1px solid var(--md-sys-color-outline-variant);
    padding: 24px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.footer p {
    font-size: var(--md-sys-typescale-body-small);
    color: var(--md-sys-color-on-surface-variant);
    text-align: left;
}

@media (max-width: 768px) {
    .nav-content {
        padding: 8px 16px;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-nav {
        display: flex;
    }

    .hero-section {
        padding: 32px 16px;
        min-height: auto;
    }

    .hero-content {
        padding-left: 0;
    }

    .avatar {
        width: 100px;
        height: 100px;
        border-radius: 20px;
    }

    .hero-title {
        font-size: var(--md-sys-typescale-headline-large);
    }

    .hero-subtitle {
        font-size: var(--md-sys-typescale-title-medium);
    }

    .hero-description {
        font-size: var(--md-sys-typescale-body-medium);
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .md3-btn {
        width: 100%;
    }

    .hero-social-links {
        gap: 8px;
        flex-wrap: nowrap;
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 4px;
    }

    .hero-social-link {
        width: 40px;
        height: 40px;
        flex-shrink: 0;
    }

    .section {
        padding: 48px 16px;
    }

    .section-title {
        font-size: var(--md-sys-typescale-headline-small);
        margin-bottom: 32px;
    }

    .contact-info,
    .social-links-container {
        padding: 20px;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        justify-content: flex-start;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1025px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 769px) {
    .nav-link {
        position: relative;
    }

    .nav-link::before {
        content: '';
        position: absolute;
        inset: 0;
        background-color: var(--md-sys-color-primary);
        border-radius: var(--md-sys-shape-corner-full);
        opacity: 0;
        transform: scaleX(0.8);
        transition: opacity var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard),
                    transform var(--md-sys-motion-duration-short4) var(--md-sys-motion-easing-standard);
        z-index: -1;
    }

    .nav-link:hover::before {
        opacity: 0.08;
        transform: scaleX(1);
    }

    .nav-link:active::before {
        opacity: 0.12;
    }

    .nav-link.active {
        color: var(--md-sys-color-primary);
        font-weight: 600;
    }

    .nav-link.active::before {
        opacity: 0.12;
        transform: scaleX(1);
    }
}

.section {
    opacity: 1;
}

/* 按钮水波纹效果增强 */
.md3-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.25) 0%, transparent 60%);
    transform: translate(-50%, -50%) scale(0);
    transition: transform 400ms cubic-bezier(0.4, 0, 0.2, 1),
                opacity 300ms cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    pointer-events: none;
    will-change: transform, opacity;
}

.md3-btn:active::after {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.8;
    transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1),
                opacity 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

.avatar-container {
    position: relative;
}

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

.floating {
    animation: float 3s ease-in-out infinite;
}

/* 右滑入动画 - 仅用于社交媒体卡片 */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}