:root {
    --ios-bg: #000000;
    --ios-card-bg: rgba(28, 28, 30, 0.65);
    --ios-card-border: rgba(255, 255, 255, 0.15);
    --ios-text-primary: #ffffff;
    --ios-text-secondary: #86868b;
    --ios-blue: #0a84ff;
    --ios-green: #30d158;
    --ios-indigo: #5e5ce6;
    --ios-red: #ff453a;
    --glass-blur: 25px;
    --transition-speed: 0.3s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'SF Pro Display', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: #000;
    color: var(--ios-text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

/* 极光流体背景层 */
.bg-visuals {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: radial-gradient(circle at 50% 50%, #1a1a1a 0%, #000 100%);
    overflow: hidden;
}

.bg-blob {
    position: absolute;
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, rgba(10, 132, 255, 0.3) 0%, rgba(94, 92, 230, 0.3) 100%);
    filter: blur(80px);
    border-radius: 50%;
    z-index: -1;
    animation: blobMove 20s infinite alternate cubic-bezier(0.45, 0, 0.55, 1);
}

.bg-blob:nth-child(2) {
    background: linear-gradient(135deg, rgba(48, 209, 88, 0.2) 0%, rgba(10, 132, 255, 0.2) 100%);
    width: 500px;
    height: 500px;
    right: -100px;
    top: -100px;
    animation-delay: -5s;
    animation-duration: 25s;
}

.bg-blob:nth-child(3) {
    background: linear-gradient(135deg, rgba(255, 69, 58, 0.15) 0%, rgba(255, 159, 10, 0.15) 100%);
    width: 700px;
    height: 700px;
    left: -200px;
    bottom: -200px;
    animation-delay: -10s;
    animation-duration: 30s;
}

@keyframes blobMove {
    0% { transform: translate(0, 0) scale(1) rotate(0deg); }
    33% { transform: translate(100px, 50px) scale(1.1) rotate(120deg); }
    66% { transform: translate(-50px, 150px) scale(0.9) rotate(240deg); }
    100% { transform: translate(0, 0) scale(1) rotate(360deg); }
}

#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.6;
}

.glass-container {
    width: 100%;
    min-height: 100vh;
    padding: 3rem 2rem;
    border-radius: 0;
    background: rgba(20, 20, 20, 0.2);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: none;
    box-shadow: none;
    animation: fadeIn 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.header {
    text-align: center;
    margin-bottom: 4rem;
}

.logo-container {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
    position: relative;
}

.logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 26px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.5s ease;
}

.logo:hover {
    transform: scale(1.05) rotate(5deg);
}

.glow-effect {
    animation: pulseGlow 3s infinite alternate;
}

.title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    background: linear-gradient(135deg, #fff 0%, #a5a5a5 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.subtitle {
    color: var(--ios-text-secondary);
    font-size: 1.2rem;
    font-weight: 500;
}

.cards-grid {
    display: flex;
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    max-width: 1200px;
    width: 100%;
}

.card {
    position: relative;
    background: var(--ios-card-bg);
    border-radius: 28px;
    padding: 2rem;
    text-decoration: none;
    color: var(--ios-text-primary);
    display: block;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transform: translateZ(0);
    width: 350px;
}

.card:hover {
    transform: translateY(-5px) scale(1.02);
    background: rgba(44, 44, 46, 0.8);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 255, 255, 0.2);
}

.card-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
    z-index: 2;
}

.card-icon {
    width: 50px;
    height: 50px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.ttg-chat-card .card-icon {
    background: linear-gradient(135deg, var(--ios-blue), var(--ios-indigo));
    color: white;
}

.more-works-card .card-icon {
    background: linear-gradient(135deg, var(--ios-green), #28a745);
    color: white;
}

.card-info {
    flex-grow: 1;
}

.card-info h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
}

.card-info p {
    font-size: 0.85rem;
    color: var(--ios-text-secondary);
    line-height: 1.3;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.75rem;
    color: var(--ios-green);
    background: rgba(48, 209, 88, 0.15);
    padding: 2px 8px;
    border-radius: 10px;
    margin-top: 5px;
    font-weight: 600;
}

.dot {
    width: 6px;
    height: 6px;
    background-color: var(--ios-green);
    border-radius: 50%;
    animation: blink 2s infinite;
}

.card-arrow {
    color: var(--ios-text-secondary);
    font-size: 0.9rem;
    opacity: 0.5;
    transition: opacity 0.3s, transform 0.3s;
}

.card:hover .card-arrow {
    opacity: 1;
    transform: translateX(3px);
}

.card-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.05) 50%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: skewX(-25deg);
    transition: left 0.5s;
    z-index: 1;
}

.card:hover .card-shine {
    left: 200%;
    transition: left 0.8s ease-in-out;
}

.footer {
    text-align: center;
    margin-top: 4rem;
    font-size: 0.9rem;
    color: var(--ios-text-secondary);
    opacity: 0.7;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.show {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: rgba(20, 20, 22, 0.85);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    border-radius: 0;
    padding: 4rem;
    position: relative;
    border: none;
    box-shadow: none;
    transform: scale(1);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.modal.show .modal-content {
    transform: scale(1);
}

.close-btn {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 1.5rem;
    color: var(--ios-text-secondary);
    cursor: pointer;
    background: rgba(255, 255, 255, 0.1);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.modal-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 1.5rem;
}

.modal-logo {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.3);
}

.modal-header h2 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--ios-blue);
    color: white;
    padding: 10px 20px;
    border-radius: 20px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: transform 0.2s, background-color 0.2s;
}

.btn-primary:hover {
    background-color: #0071e3;
    transform: scale(1.05);
}

/* Enhanced Layout */
.modal-body {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 900px) {
    .modal-body {
        grid-template-columns: repeat(2, 1fr);
        align-items: start;
    }
    .intro-text {
        grid-column: 1 / -1;
    }
}

.intro-text {
    font-size: 1.5rem;
    line-height: 1.6;
    color: #e5e5e7;
    margin-bottom: 4rem;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.feature-section, .tech-section {
    background: rgba(255, 255, 255, 0.03);
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s ease;
}

.feature-section:hover, .tech-section:hover {
    background: rgba(255, 255, 255, 0.06);
    transform: translateY(-5px);
}

.feature-section h3, .tech-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: white;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 1rem;
}

.tags-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.tag-group h4 {
    font-size: 1.1rem;
    color: var(--ios-blue);
    margin-bottom: 1rem;
    font-weight: 600;
}

.tag {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 12px;
    font-size: 0.95rem;
    margin-right: 10px;
    margin-bottom: 10px;
    transition: all 0.2s;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.tag:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 1.5rem;
}

.tech-item {
    background: rgba(0, 0, 0, 0.2);
    padding: 1.5rem;
    border-radius: 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.tech-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.tech-item i {
    font-size: 2rem;
    color: var(--ios-blue);
    margin-bottom: 0.2rem;
}

.tech-item span {
    font-size: 0.9rem;
    font-weight: 500;
    color: #e5e5e7;
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulseGlow {
    from {
        box-shadow: 0 0 20px rgba(10, 132, 255, 0.2);
    }
    to {
        box-shadow: 0 0 40px rgba(10, 132, 255, 0.6);
    }
}

@keyframes blink {
    0% { opacity: 1; }
    50% { opacity: 0.4; }
    100% { opacity: 1; }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

@media (max-width: 480px) {
    .glass-container {
        width: 95%;
        padding: 1.5rem;
    }
    
    .modal-content {
        width: 100%;
        height: 100%;
        border-radius: 0;
        padding: 1.5rem;
        max-height: 100vh;
    }
    
    .close-btn {
        top: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
    }

    .modal-header h2 {
        font-size: 2.5rem;
    }

    .intro-text {
        font-size: 1.1rem;
    }

    .btn-primary {
        padding: 12px 32px;
        font-size: 1rem;
    }
}