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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, #f8f9fa 0%, #e9ecef 100%);
    color: #1a1b1e;
    line-height: 1.5;
    padding: 20px;
}

.container {
    max-width: 800px;
    width: 100%;
    text-align: center;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 32px;
    padding: 48px 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

h1 {
    font-size: clamp(2rem, 8vw, 4rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    word-break: break-word;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.7;
    margin-bottom: 48px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    padding-bottom: 32px;
}

.contact {
    margin: 32px 0 40px;
}

.contact-label {
    display: block;
    font-size: 0.9rem;
    opacity: 0.6;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
    transition: opacity 0.3s ease;
}

.email-link {
    color: inherit;
    text-decoration: none;
    font-size: 1.2rem;
    border-bottom: 1px dotted rgba(0, 0, 0, 0.3);
    padding-bottom: 2px;
    transition: border-color 0.2s ease;
}

.email-link:hover {
    border-bottom: 1px solid #1a1b1e;
}

.lang-section {
    margin: 40px 0 32px;
}

.lang-label {
    display: block;
    font-size: 0.9rem;
    opacity: 0.6;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
    transition: opacity 0.3s ease;
}

.lang-switch {
    display: flex;
    gap: 12px;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.lang-btn {
    background: transparent;
    border: none;
    font-size: 1rem;
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 40px;
    transition: 0.2s;
    color: #5f5f5f;
}

.lang-btn.active {
    background: #1a1b1e;
    color: white;
    font-weight: 500;
}

.lang-btn:not(.active):hover {
    background: rgba(0, 0, 0, 0.05);
}

.footer {
    margin-top: 32px;
    font-size: 0.9rem;
    opacity: 0.5;
}

.lang-content {
    transition: opacity 0.3s ease;
}

.lang-zh, .lang-zh-tw, .lang-en {
    min-height: 100px;
}

.hidden {
    display: none;
}

.dot-pattern {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(#cccccc 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.2;
    z-index: -1;
    pointer-events: none;
}