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

html, body {
    height: 100%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0a0a0f 0%, #1a1a2e 50%, #16213e 100%);
    color: #ffffff;
    overflow-x: hidden;
}

#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: transform 0.3s ease;
    font-size: 1.5rem;
    font-weight: bold;
}

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

.logo-img {
    height: 35px;
    width: auto;
    object-fit: contain;
    display: inline-block;
    vertical-align: middle;
    filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.5));
}

.logo-text {
    background: linear-gradient(90deg, #4a90d9, #6ab0ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: logoColorShift 10s ease-in-out infinite;
    background-size: 200% 100%;
}

@keyframes logoColorShift {
    0%, 100% {
        background: linear-gradient(90deg, #4a90d9, #6ab0ff);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        filter: drop-shadow(0 0 8px rgba(74, 144, 217, 0.4));
    }
    20% {
        background: linear-gradient(90deg, #5ab8d8, #7dd3e8);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        filter: drop-shadow(0 0 8px rgba(90, 184, 216, 0.4));
    }
    40% {
        background: linear-gradient(90deg, #6ac8c4, #8ee0db);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        filter: drop-shadow(0 0 8px rgba(106, 200, 196, 0.4));
    }
    60% {
        background: linear-gradient(90deg, #5ab8d8, #7dd3e8);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        filter: drop-shadow(0 0 8px rgba(90, 184, 216, 0.4));
    }
    80% {
        background: linear-gradient(90deg, #4d9dd6, #70b8f0);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        filter: drop-shadow(0 0 8px rgba(77, 157, 214, 0.4));
    }
}

.navbar-center {
    display: flex;
    gap: 2rem;
}

.navbar-center a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.navbar-center a:hover {
    color: #00d4ff;
}

.navbar-yinian {
    padding: 0.5rem 1.2rem !important;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.3), rgba(0, 212, 255, 0.3));
    border: 2px solid rgba(0, 212, 255, 0.5);
    border-radius: 25px;
    color: white !important;
    font-weight: 600;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 212, 255, 0.6), 0 0 40px rgba(0, 102, 204, 0.4);
    }
}

.navbar-yinian:hover {
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.5), rgba(0, 212, 255, 0.5));
    border-color: rgba(0, 212, 255, 0.8);
    transform: translateY(-2px);
    box-shadow: 0 5px 25px rgba(0, 212, 255, 0.5) !important;
}

.floating-lang-btn {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.9), rgba(0, 212, 255, 0.9));
    border: 2px solid rgba(255, 255, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.4);
    transition: all 0.3s ease;
}

.floating-lang-btn:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.6);
}

.floating-lang-btn span {
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
}

.floating-lang-btn.show {
    animation: floatIn 0.5s ease-out;
}

.floating-lang-btn.hide {
    animation: floatOut 0.5s ease-out;
}

@keyframes floatIn {
    from {
        opacity: 0;
        right: -60px;
    }
    to {
        opacity: 1;
        right: 20px;
    }
}

@keyframes floatOut {
    from {
        opacity: 1;
        right: 20px;
    }
    to {
        opacity: 0;
        right: -60px;
    }
}

.mobile-warning {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0, 0, 0, 0.85);
    border: 2px solid rgba(255, 100, 100, 0.8);
    border-radius: 16px;
    padding: 1.5rem 2.5rem;
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    z-index: 1000;
    animation: warningFadeIn 0.5s ease-out;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.mobile-warning.hide {
    animation: warningFadeOut 1s ease-out forwards;
}

@keyframes warningFadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.8);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
}

@keyframes warningFadeOut {
    from {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
    to {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.8);
    }
}

.download-tip {
    position: fixed;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 102, 204, 0.9);
    border: 2px solid rgba(0, 212, 255, 0.6);
    border-radius: 12px;
    padding: 1rem 2rem;
    color: white;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    z-index: 1000;
    animation: tipFadeIn 0.5s ease-out;
    box-shadow: 0 8px 30px rgba(0, 102, 204, 0.4);
}

.download-tip.hide {
    animation: tipFadeOut 1s ease-out forwards;
}

@keyframes tipFadeIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

@keyframes tipFadeOut {
    from {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    to {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
}

.navbar-right button {
    padding: 0.5rem 1rem;
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    border: none;
    border-radius: 20px;
    color: white;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.navbar-right button:hover {
    transform: scale(1.05);
}

.mobile-navbar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
}

.mobile-navbar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
}

.mobile-navbar-buttons {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(124, 58, 237, 0.2));
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.mobile-nav-link:hover {
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.4), rgba(0, 212, 255, 0.4));
    border-color: rgba(0, 212, 255, 0.5);
    transform: scale(1.05);
    color: white;
}

#main-content {
    position: relative;
    z-index: 1;
    padding-top: 80px;
}

.section-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

.page {
    display: none !important;
    padding: 2rem;
    min-height: calc(100vh - 80px);
}

.page.active {
    display: block !important;
}

.hero-section {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.bubble {
    position: absolute;
    top: 20%;
    padding: 0.5rem 1.5rem;
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    border-radius: 20px;
    font-size: 0.9rem;
    animation: float 3s ease-in-out infinite;
}

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

.hero-title {
    font-size: 6rem;
    font-weight: bold;
    background: linear-gradient(90deg, #00d4ff, #7c3aed, #f093fb);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shine 3s linear infinite;
    margin-bottom: 1rem;
}

@keyframes shine {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

.hero-subtitle {
    font-size: 2.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 700px;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-buttons button {
    padding: 1rem 2rem;
    font-size: 1rem;
    border: none;
    border-radius: 30px;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-buttons button:first-child {
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    color: white;
}

.hero-buttons button:last-child {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-buttons button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

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

.features-section {
    padding: 4rem 2rem;
    text-align: center;
}

.features-intro {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 800px;
    margin: 0 auto 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 1.5rem;
    min-height: 180px;
    max-height: 220px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature-card p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.download-small {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.download-small h3 {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0.5rem;
}

.download-small-buttons {
    display: flex;
    gap: 0.5rem;
}

.download-small-buttons button {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    border: none;
    border-radius: 20px;
    color: white;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.download-small-buttons button:hover {
    transform: scale(1.05);
}

.comments-section {
    padding: 4rem 2rem;
    text-align: center;
}

.comments-section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    background: linear-gradient(90deg, #00d4ff, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.chat-container {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    overflow: hidden;
}

.chat-messages {
    height: 300px;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(0, 212, 255, 0.5);
    border-radius: 3px;
}

.chat-message {
    display: flex;
    flex-direction: column;
    max-width: 70%;
}

.chat-message.other {
    align-items: flex-start;
}

.chat-message.self {
    align-items: flex-end;
}

.message-content {
    padding: 0.75rem 1rem;
    border-radius: 16px;
    font-size: 0.95rem;
}

.chat-message.other .message-content {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px 16px 16px 4px;
}

.chat-message.self .message-content {
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    border-radius: 16px 16px 4px 16px;
}

.message-author {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 0.25rem;
}

.chat-input {
    display: flex;
    gap: 0.5rem;
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-input input {
    flex: 1;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    color: white;
    outline: none;
    transition: border-color 0.3s ease;
}

.chat-input input:focus {
    border-color: #00d4ff;
}

.chat-input input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.chat-input button {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    border: none;
    border-radius: 20px;
    color: white;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.chat-input button:hover {
    transform: scale(1.05);
}

.follow-section {
    padding: 4rem 2rem;
    text-align: center;
}

.follow-intro {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2rem;
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.social-card {
    position: relative;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 0.8rem 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: white;
}

.social-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

.social-card.douyin {
    background: linear-gradient(135deg, rgba(254, 44, 85, 0.3), rgba(255, 0, 80, 0.3));
    border-color: rgba(254, 44, 85, 0.5);
}

.social-card.douyin:hover {
    background: linear-gradient(135deg, rgba(254, 44, 85, 0.5), rgba(255, 0, 80, 0.5));
}

.social-card.bilibili {
    background: linear-gradient(135deg, rgba(0, 161, 214, 0.3), rgba(0, 181, 229, 0.3));
    border-color: rgba(0, 161, 214, 0.5);
}

.social-card.bilibili:hover {
    background: linear-gradient(135deg, rgba(0, 161, 214, 0.5), rgba(0, 181, 229, 0.5));
}

.social-card.xiaohongshu {
    background: linear-gradient(135deg, rgba(255, 44, 85, 0.3), rgba(255, 107, 138, 0.3));
    border-color: rgba(255, 44, 85, 0.5);
}

.social-card.xiaohongshu:hover {
    background: linear-gradient(135deg, rgba(255, 44, 85, 0.5), rgba(255, 107, 138, 0.5));
}

.social-card.kuaishou {
    background: linear-gradient(135deg, rgba(0, 198, 251, 0.3), rgba(0, 91, 234, 0.3));
    border-color: rgba(0, 198, 251, 0.5);
}

.social-card.kuaishou:hover {
    background: linear-gradient(135deg, rgba(0, 198, 251, 0.5), rgba(0, 91, 234, 0.5));
}

.social-card .recommend {
    position: absolute;
    top: -8px;
    right: -8px;
    padding: 0.25rem 0.5rem;
    background: #f59e0b;
    border-radius: 8px;
    font-size: 0.7rem;
    color: white;
}

.qq-group-title {
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.7);
}

.qq-group-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 400px;
    margin: 0 auto 1rem;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.qq-group-card:hover {
    background: rgba(255, 255, 255, 0.1);
}

.group-name {
    font-weight: bold;
}

.group-id {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

.qq-group-card button {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.qq-group-card button:hover {
    background: linear-gradient(90deg, #00d4ff, #7c3aed);
    border-color: transparent;
}

.donate-section {
    padding: 4rem 2rem;
    text-align: center;
}

.donate-intro {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2rem;
}

.donate-warning {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 8px;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.warning-title {
    color: #f59e0b;
    font-weight: bold;
}

.donate-methods {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 500px;
    margin: 0 auto 2rem;
}

.donate-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
}

.donate-card span {
    margin-bottom: 1rem;
    font-weight: bold;
}

.qrcode-placeholder {
    width: 150px;
    height: 150px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px dashed rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

.donate-suggestion {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

.acknowledgements-section {
    padding: 4rem 2rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.acknowledgements-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.acknowledgements-list {
    font-size: 0.85rem !important;
    color: rgba(255, 255, 255, 0.6) !important;
}

.feedback-section {
    padding: 4rem 2rem;
    text-align: center;
}

.feedback-intro {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2rem;
}

.feedback-section textarea {
    width: 100%;
    max-width: 500px;
    height: 150px;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    outline: none;
    resize: none;
    margin-bottom: 1rem;
    transition: border-color 0.3s ease;
}

.feedback-section textarea:focus {
    border-color: #00d4ff;
}

.feedback-section textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.feedback-section input[type="email"] {
    width: 100%;
    max-width: 500px;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    outline: none;
    margin-bottom: 1rem;
    transition: border-color 0.3s ease;
}

.feedback-section input[type="email"]:focus {
    border-color: #00d4ff;
}

.feedback-section input[type="email"]::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.feedback-section button {
    padding: 1rem 2rem;
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    border: none;
    border-radius: 20px;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.feedback-section button:hover {
    transform: scale(1.05);
}

#footer {
    background: rgba(10, 10, 15, 0.95);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 3rem 2rem;
    margin-top: 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.9);
}

.footer-section a, .footer-section span {
    display: block;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #00d4ff;
}

.footer-btn {
    display: block;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    cursor: pointer;
    margin-bottom: 0.5rem;
    padding: 0;
    text-align: left;
    transition: color 0.3s ease;
}

.footer-btn:hover {
    color: #00d4ff;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.page h1 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page p {
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2rem;
}

.doc-card {
    max-width: 400px;
    margin: 0 auto 2rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    text-align: center;
}

.doc-card span {
    display: block;
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.doc-card p {
    font-size: 0.9rem;
    margin-bottom: 0;
}

.page button {
    display: block;
    margin: 0 auto 2rem;
    padding: 1rem 2rem;
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    border: none;
    border-radius: 20px;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.page button:hover {
    transform: scale(1.05);
}

.page a {
    color: #00d4ff;
    text-decoration: none;
}

.page a:hover {
    text-decoration: underline;
}

#feedback-type {
    display: block;
    margin: 0 auto 2rem;
    padding: 1rem;
    width: 100%;
    max-width: 500px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    outline: none;
}

#feedback-type option {
    background: #1a1a2e;
    color: white;
}

.download-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
}

.download-column {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
}

.download-column h2 {
    margin-bottom: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
}

.download-column button {
    display: block;
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    cursor: pointer;
}

.download-column button.disabled-version {
    background: rgba(100, 100, 100, 0.2);
    border-color: rgba(100, 100, 100, 0.3);
    color: rgba(150, 150, 150, 0.6);
    cursor: not-allowed;
    transition: all 0.3s ease;
}

.download-column button:hover {
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    border-color: transparent;
}

.download-column p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

.download-footer {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.donate-link, .feedback-link {
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    text-align: center;
}

.donate-link span, .feedback-link span {
    display: block;
    margin-bottom: 1rem;
}

.donate-link button, .feedback-link button {
    margin: 0;
}

.lock-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 50vh;
}

.lock-screen input[type="password"] {
    padding: 1rem;
    width: 300px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    outline: none;
    margin-bottom: 1rem;
    transition: border-color 0.3s ease;
}

.lock-screen input[type="password"]:focus {
    border-color: #00d4ff;
}

.lock-screen input[type="password"]::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.lock-screen button {
    padding: 1rem 2rem;
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    border: none;
    border-radius: 20px;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.lock-screen button:hover {
    transform: scale(1.05);
}

.data-center-content {
    text-align: center;
    padding: 2rem;
}

.data-center-content p {
    margin-bottom: 0.5rem;
}

.data-number {
    display: block;
    font-size: 2.5rem;
    font-weight: bold;
    background: linear-gradient(90deg, #00d4ff, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 2rem;
}

.console-content {
    padding: 2rem;
}

.console-content h2 {
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.9);
}

.list-container {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 2rem;
}

.list-container p {
    text-align: left;
    margin-bottom: 1rem;
    font-weight: bold;
}

.list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.delete-btn {
    padding: 0.5rem 1rem;
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.5);
    border-radius: 8px;
    color: #ef4444;
    cursor: pointer;
    transition: all 0.3s ease;
}

.delete-btn:hover {
    background: rgba(239, 68, 68, 0.3);
}

#page-yinian {
    text-align: center;
    position: relative;
    min-height: 100vh;
    overflow: hidden;
    background: linear-gradient(135deg, #0a0a0f 0%, #0d1a2d 50%, #0a1628 100%);
}

#yinian-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

#yinian-popup-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
}

.yinian-sphere-canvas {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 300px;
    height: 300px;
    z-index: 1;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1.5s ease;
}

.yinian-sphere-canvas.active {
    opacity: 1;
}

#yinian-sphere-left {
    left: 20px;
}

#yinian-sphere-right {
    right: 20px;
}

#yinian-color-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity 2s ease;
}

#yinian-content-wrapper {
    position: relative;
    z-index: 2;
    padding: 2rem;
}

#page-yinian::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 40%, rgba(0, 102, 204, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

#page-yinian .yinian-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    padding: 2rem;
    margin: 2rem auto;
    max-width: 500px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 2;
    transform: translateZ(20px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

#page-yinian .yinian-card:hover {
    transform: translateZ(30px) scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 102, 204, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

#page-yinian .yinian-card::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.3), rgba(0, 212, 255, 0.3));
    border-radius: 20px;
    z-index: -1;
    opacity: 0.5;
}

#page-yinian .avatar-placeholder {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.3), rgba(0, 212, 255, 0.3));
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 2px solid rgba(0, 212, 255, 0.5);
    margin: 2rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.3),
                inset 0 0 20px rgba(0, 102, 204, 0.2);
    animation: avatarGlow 3s ease-in-out infinite;
    position: relative;
    z-index: 2;
    transform-style: preserve-3d;
    transform: translateZ(30px);
    transition: transform 0.3s ease;
}

#page-yinian .avatar-placeholder:hover {
    transform: translateZ(40px) scale(1.05);
}

@keyframes avatarGlow {
    0%, 100% {
        box-shadow: 0 0 30px rgba(0, 212, 255, 0.3),
                    inset 0 0 20px rgba(0, 102, 204, 0.2);
    }
    50% {
        box-shadow: 0 0 50px rgba(0, 212, 255, 0.5),
                    inset 0 0 30px rgba(0, 102, 204, 0.3);
    }
}

#page-yinian .note-box {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 1rem;
    margin-top: 1rem;
}

#page-yinian h1 {
    background: linear-gradient(90deg, #0066cc, #00d4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 3rem;
    position: relative;
    z-index: 2;
    transform: translateZ(20px);
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
}

#page-yinian h2 {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 2rem;
    position: relative;
    z-index: 2;
    transform: translateZ(15px);
}

#page-yinian .yinian-contact {
    color: rgba(255, 255, 255, 0.6);
    margin-top: 1rem;
}

#page-yinian a[href^="mailto"] {
    color: #00d4ff;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

#page-yinian a[href^="mailto"]:hover {
    text-decoration: underline;
    color: #00a8e6;
}

#page-yinian .note-box {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 1rem;
    margin-top: 1rem;
}

.yinian-particle-network {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

@keyframes particleFadeIn {
    from {
        opacity: 0;
        transform: scale(0.5);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes sphereRotate {
    from {
        transform: translateY(-50%) rotate(0deg);
    }
    to {
        transform: translateY(-50%) rotate(360deg);
    }
}

.countdown-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
}

.countdown-container #countdown {
    color: #00d4ff;
    font-weight: bold;
    font-size: 1.2rem;
}

@media (max-width: 768px) {
    .yinian-sphere-canvas {
        width: 150px;
        height: 150px;
    }
    
    #yinian-sphere-left {
        left: 5px;
    }
    
    #yinian-sphere-right {
        right: 5px;
    }
    
    #page-yinian .avatar-placeholder {
        width: 120px;
        height: 120px;
    }
    
    #page-yinian h1 {
        font-size: 2.5rem;
    }
    
    #page-yinian h2 {
        font-size: 1.2rem;
    }
}

#countdown {
    font-size: 2rem;
    font-weight: bold;
    color: #00d4ff;
}

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

@media (max-width: 768px) {
    .navbar {
        display: none;
    }
    
    .mobile-navbar {
        display: block;
    }
    
    #main-content {
        padding-top: 60px;
    }
    
    .bubble {
        display: none !important;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .social-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .download-container {
        grid-template-columns: 1fr;
    }
    
    .download-footer {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .donate-methods {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 250px;
    }
    
    .social-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .logo-img {
        height: 28px;
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
    
    #page-yinian .avatar-container {
        width: 140px;
        height: 140px;
    }
    
    .qrcode-img {
        max-width: 160px;
        max-height: 160px;
    }
    
    .doc-buttons {
        flex-direction: column;
        align-items: center;
        gap: 0.8rem;
    }
}

@media (max-aspect-ratio: 1/1) {
    .doc-buttons {
        flex-direction: column;
        align-items: center;
        gap: 0.8rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 280px;
    }
    
    .hero-section {
        padding: 1.5rem;
    }
}

.feedback-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 3rem 2rem;
    min-height: calc(100vh - 80px);
}

.feedback-page h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(90deg, #00d4ff, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feedback-subtitle {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 2rem;
    text-align: center;
}

.feedback-form-container {
    width: 100%;
    max-width: 500px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

.form-group select {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group select:focus {
    border-color: #00d4ff;
}

.form-group select option {
    background: #1a1a2e;
    color: white;
}

.form-group textarea {
    width: 100%;
    height: 150px;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    outline: none;
    resize: none;
    transition: border-color 0.3s ease;
}

.form-group textarea:focus {
    border-color: #00d4ff;
}

.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group input[type="email"] {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group input[type="email"]:focus {
    border-color: #00d4ff;
}

.form-group input[type="email"]::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.submit-btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(90deg, #00d4ff, #7c3aed);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

#page-yinian .avatar-container {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    margin: 2rem auto;
    position: relative;
    z-index: 2;
    transform-style: preserve-3d;
    transform: translateZ(30px);
    transition: transform 0.3s ease;
    overflow: hidden;
    border: 3px solid rgba(0, 212, 255, 0.6);
    box-shadow: 0 0 40px rgba(0, 212, 255, 0.4),
                inset 0 0 30px rgba(0, 102, 204, 0.3);
    animation: avatarGlow 3s ease-in-out infinite;
}

#page-yinian .avatar-container:hover {
    transform: translateZ(40px) scale(1.05);
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.6),
                inset 0 0 40px rgba(0, 102, 204, 0.4);
}

#page-yinian .avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.qrcode-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    margin-top: 1rem;
}

.qrcode-img {
    max-width: 200px;
    max-height: 200px;
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.qrcode-img:hover {
    transform: scale(1.05);
}

.doc-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: stretch;
    margin: 2rem auto;
    padding: 0 1rem;
    flex-wrap: nowrap;
    width: 100%;
    max-width: 420px;
    min-height: 48px;
}

.doc-download-btn {
    flex: 1;
    width: 160px;
    height: 48px;
    padding: 0.8rem 1.2rem;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.4), rgba(0, 212, 255, 0.4));
    border: 2px solid rgba(0, 212, 255, 0.5);
    border-radius: 25px;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.2);
    cursor: pointer;
    margin: 0;
}

.doc-download-btn:hover {
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.6), rgba(0, 212, 255, 0.6));
    border-color: rgba(0, 212, 255, 0.8);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}