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

:root {
    --primary-blue: #2196F3;
    --blue-light: #64B5F6;
    --blue-dark: #1976D2;
    --blue-hover: #42A5F5;
    --text-on-blue: #FFFFFF;
    --background: #F5F9FF;
    --card-bg: #FFFFFF;
    --sidebar-bg: #FFFFFF;
    --shadow: rgba(33, 150, 243, 0.1);
    --text-color: #333333;
    --text-light: #666666;
    --border-color: #E3F2FD;
    --success: #4CAF50;
    --error: #F44336;
    --warning: #ffb13e;
    --primary-warning: #FF9800;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #F5F9FF 0%, #E3F2FD 100%);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}

.blue-text {
    color: var(--primary-blue);
    font-weight: 600;
    animation: colorShift 4s ease-in-out infinite;
}

@keyframes colorShift {
    0%, 100% {
        color: #2196F3;
        text-shadow: 0 0 10px rgba(33, 150, 243, 0.3);
    }
    25% {
        color: #1976D2;
        text-shadow: 0 0 15px rgba(25, 118, 210, 0.4);
    }
    50% {
        color: #42A5F5;
        text-shadow: 0 0 20px rgba(66, 165, 245, 0.5);
    }
    75% {
        color: #64B5F6;
        text-shadow: 0 0 15px rgba(100, 181, 246, 0.4);
    }
}

.site-title {
    position: fixed;
    top: 20px;
    left: 20px;
    font-size: 1.2rem;
    z-index: 100;
    background: var(--card-bg);
    padding: 10px 20px;
    border-radius: 10px;
    box-shadow: 0 4px 12px var(--shadow);
    border-left: 4px solid var(--primary-blue);
    font-weight: 500;
    animation: slideInLeft 0.5s ease;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.menu-toggle {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-blue), var(--blue-dark));
    border: none;
    border-radius: 16px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    box-shadow: 0 6px 20px rgba(33, 150, 243, 0.4);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
}

.menu-toggle:hover {
    background: linear-gradient(135deg, var(--blue-dark), var(--primary-blue));
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(33, 150, 243, 0.5);
}

.menu-toggle:active {
    transform: translateY(-1px) scale(0.98);
}

.hamburger-line {
    width: 26px;
    height: 2.5px;
    background: var(--text-on-blue);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.menu-toggle:hover .hamburger-line:nth-child(1) {
    transform: translateY(-2px);
}

.menu-toggle:hover .hamburger-line:nth-child(3) {
    transform: translateY(2px);
}

.sidebar {
    position: fixed;
    top: 0;
    left: -320px;
    width: 300px;
    height: 100vh;
    background: var(--sidebar-bg);
    box-shadow: 4px 0 25px rgba(0, 0, 0, 0.15);
    z-index: 999;
    transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
}

.sidebar.active {
    left: 0;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-blue), var(--blue-light));
    color: var(--text-on-blue);
}

.sidebar-header h3 {
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.close-sidebar {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--text-on-blue);
    cursor: pointer;
    font-size: 1.3rem;
    padding: 6px;
    border-radius: 6px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-sidebar:hover {
    background: #F44336;
    transform: scale(1.2);
    box-shadow: 0 4px 12px rgba(244, 67, 54, 0.4);
}

.nav-list {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 28px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.3s ease;
    border-left: 4px solid transparent;
    margin: 4px 0;
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, rgba(33, 150, 243, 0.1), transparent);
    transition: width 0.3s ease;
}

.nav-item:hover::before {
    width: 100%;
}

.nav-item:hover {
    background: var(--background);
    color: var(--primary-blue);
    border-left-color: var(--primary-blue);
    padding-left: 32px;
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(33, 150, 243, 0.15), transparent);
    color: var(--primary-blue);
    border-left-color: var(--primary-blue);
    font-weight: 600;
}

.nav-item i {
    width: 24px;
    text-align: center;
    color: var(--primary-blue);
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.nav-item:hover i {
    transform: scale(1.2) rotate(5deg);
}

.nav-item span {
    font-size: 1.05rem;
}

.sidebar-footer {
    padding: 20px;
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    background: var(--background);
}

main {
    min-height: 100vh;
    padding: 20px;
    transition: margin-left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.intro-section {
    display: none;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 40px);
    animation: fadeInUp 0.6s ease;
}

.intro-section.active {
    display: flex;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.intro-card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 50px 40px;
    text-align: center;
    max-width: 550px;
    width: 100%;
    box-shadow: 0 15px 40px var(--shadow);
    border: 2px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.intro-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 50px rgba(33, 150, 243, 0.2);
}

.avatar-container {
    position: relative;
    width: 160px;
    height: 160px;
    margin: 0 auto 35px;
}

.avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 6px solid var(--card-bg);
    box-shadow: 0 0 0 5px var(--primary-blue), 0 8px 20px rgba(33, 150, 243, 0.3);
    transition: transform 0.3s ease;
}

.intro-card:hover .avatar {
    transform: scale(1.05);
}

.avatar-ring {
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border: 3px dashed var(--blue-light);
    border-radius: 50%;
    animation: spin 25s linear infinite;
    opacity: 0.6;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.gradientText {
    font-size: 2.8rem;
    margin-bottom: 15px;
    background: linear-gradient(135deg, var(--primary-blue), var(--blue-dark), var(--blue-light), var(--primary-blue));
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    letter-spacing: 2px;
    animation: gradientShift 5s ease infinite;
}

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

.tagline {
    font-size: 1.3rem;
    color: var(--text-light);
    margin-bottom: 35px;
    font-weight: 400;
    animation: taglineColor 6s ease-in-out infinite;
}

@keyframes taglineColor {
    0%, 100% {
        color: #666666;
    }
    33% {
        color: #2196F3;
    }
    66% {
        color: #1976D2;
    }
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 35px;
}

.social-icon {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--background), var(--border-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-blue);
    font-size: 1.4rem;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    position: relative;
}

.social-icon:hover {
    background: linear-gradient(135deg, var(--primary-blue), var(--blue-dark));
    color: var(--text-on-blue);
    transform: translateY(-8px) rotate(360deg);
    box-shadow: 0 8px 20px rgba(33, 150, 243, 0.4);
    border-color: var(--primary-blue);
}

.email-tooltip {
    background: var(--card-bg);
    padding: 12px 16px;
    border-radius: 10px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 12px;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    border: 2px solid var(--primary-blue);
}

.email-tooltip.show {
    opacity: 1;
    transform: translateY(0);
}

.email-text {
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 500;
}

.copy-email {
    background: var(--primary-blue);
    border: none;
    color: white;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.copy-email:hover {
    background: var(--blue-dark);
    transform: scale(1.1);
}

.projects-section {
    display: none;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px;
}

.projects-section.active {
    display: block;
    animation: fadeIn 0.6s ease;
}

.gallery-section {
    display: none;
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px;
}

.gallery-section.active {
    display: block;
    animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.2rem;
    color: var(--primary-blue);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-weight: 700;
}

.section-header p {
    text-decoration: none;
    font-weight: 600;
    display: block;
    align-items: center;
    color: var(--text-light);
    margin-bottom: 10px;
    font-size: 1.15rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.project-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 6px 20px var(--shadow);
    border: 2px solid var(--border-color);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

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

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(33, 150, 243, 0.25);
    border-color: var(--primary-blue);
}

.project-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue), var(--blue-light));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.8rem;
    color: var(--text-on-blue);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

.project-card h3 {
    background: linear-gradient(135deg, var(--primary-blue), var(--blue-dark), var(--blue-light), var(--primary-blue));
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
    font-size: 1.4rem;
    font-weight: 600;
    animation: gradientShift 5s ease infinite;
}

.project-card p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 20px;
}

.project-verLine{
    text-decoration: none;
    font-weight: 600;
    display: block;
    align-items: center;
    color: var(--text-light);
    transition: all 0.3s ease;
    margin-bottom: 10px;
}

.project-verLine:hover {
    color: var(--primary-blue);
    gap: 12px;
}


.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: 8px;
    background: rgba(33, 150, 243, 0.1);
}

.project-link:hover {
    background: var(--primary-blue);
    color: var(--text-on-blue);
    gap: 12px;
}

.project-links-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 8px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.project-links-group.collapsible {
    display: none;
    animation: fadeInLinks 0.3s ease;
}

.project-links-group.collapsible.show {
    display: grid;
}

@keyframes fadeInLinks {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.toggle-more-links {
    width: 100%;
    margin-top: 12px;
    padding: 10px 16px;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.1), rgba(100, 181, 246, 0.1));
    border: 2px dashed var(--primary-blue);
    border-radius: 8px;
    color: var(--primary-blue);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.95rem;
}

.toggle-more-links:hover {
    background: linear-gradient(135deg, var(--primary-blue), var(--blue-light));
    color: var(--text-on-blue);
    border-style: solid;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

.toggle-more-links .toggle-icon {
    transition: transform 0.3s ease;
}

.toggle-more-links.expanded .toggle-icon {
    transform: rotate(180deg);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.gallery-placeholder {
    grid-column: 1 / -1;
    background: var(--card-bg);
    border-radius: 16px;
    padding: 80px 40px;
    text-align: center;
    box-shadow: 0 6px 20px var(--shadow);
    border: 2px dashed var(--border-color);
    transition: all 0.3s ease;
}

.gallery-placeholder:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 12px 30px rgba(33, 150, 243, 0.2);
}

.gallery-placeholder i {
    font-size: 4rem;
    color: var(--blue-light);
    margin-bottom: 20px;
    opacity: 0.6;
}

.gallery-placeholder p {
    font-size: 1.3rem;
    color: var(--text-light);
    font-weight: 500;
}

.project-links-group .group-label {
    grid-column: 1 / -1;
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 2px;
    opacity: 0.7;
    text-transform: uppercase;
    letter-spacing: 1px;
}


.project-warning {
    display: block;
    align-items: center;
    gap: 8px;
    color: #FFFFFF;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    padding: 8px 16px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.3);
    border: 2px solid rgb(255 177 62);
    margin-bottom: 15px;
}

.project-warning:hover {
    color: var(--text-on-blue);
    background: var(--warning);
    border-color: var(--warning);
    gap: 12px;
}



.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 20px;
    width: 90%;
    max-width: 420px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    transform: translateY(30px) scale(0.9);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.modal.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-header {
    padding: 24px 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-blue), var(--blue-light));
    color: var(--text-on-blue);
}

.modal-header h3 {
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.close-modal {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: var(--text-on-blue);
    cursor: pointer;
    font-size: 1.3rem;
    padding: 6px;
    border-radius: 6px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-modal:hover {
    background: #F44336;
    transform: scale(1.2);
    box-shadow: 0 4px 12px rgba(244, 67, 54, 0.4);
}

.modal-body {
    padding: 35px 30px;
}

.modal-body p {
    margin-bottom: 25px;
    color: var(--text-light);
    text-align: center;
    font-size: 1.05rem;
}

.input-group {
    display: flex;
    gap: 12px;
    margin-bottom: 15px;
}

#access-code {
    flex: 1;
    padding: 14px 20px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--background);
}

#access-code:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.15);
    background: var(--card-bg);
}

.blue-btn {
    background: linear-gradient(135deg, var(--primary-blue), var(--blue-dark));
    color: var(--text-on-blue);
    border: none;
    padding: 14px 28px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

.blue-btn:hover {
    background: linear-gradient(135deg, var(--blue-dark), var(--primary-blue));
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(33, 150, 243, 0.4);
}

.blue-btn:active {
    transform: translateY(0);
}

.error-msg {
    color: var(--error);
    text-align: center;
    font-size: 0.95rem;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 15px;
    padding: 12px;
    background: rgba(244, 67, 54, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(244, 67, 54, 0.2);
    display: none;
}

.error-msg.show {
    display: flex;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

@media (max-width: 768px) {
    .site-title {
        top: 15px;
        left: 15px;
        font-size: 1rem;
        padding: 8px 16px;
    }

    .menu-toggle {
        bottom: 20px;
        left: 20px;
        width: 50px;
        height: 50px;
    }

    .sidebar {
        width: 280px;
        left: -280px;
    }

    .intro-card {
        padding: 40px 25px;
        margin: 0 15px;
    }

    .gradientText {
        font-size: 2.2rem;
    }

    .tagline {
        font-size: 1.1rem;
    }

    .avatar-container {
        width: 130px;
        height: 130px;
    }

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }
}

@media (min-width: 769px) {
    .sidebar.active ~ main {
        margin-left: 300px;
    }
}