/* Footer 樣式 */
.modern-footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    margin-top: 100px;
    position: relative;
    overflow: hidden;
}

    .modern-footer::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="100" height="100" fill="none"/><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.05)"/></svg>');
        opacity: 0.3;
    }

.footer-wave {
    position: absolute;
    top: -100px;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    clip-path: polygon(0 50%, 100% 0, 100% 100%, 0 100%);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 80px 40px 30px;
    position: relative;
    z-index: 1;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 50px;
}

.footer-brand {
    padding-right: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 25px;
}

.footer-logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.footer-logo-text {
    font-size: 28px;
    font-weight: 800;
    color: white;
}

.footer-description {
    color: rgba(255,255,255,0.8);
    line-height: 1.8;
    margin-bottom: 25px;
    font-size: 15px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.social-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: all 0.3s ease;
    color: white;
    text-decoration: none;
}

    .social-btn:hover {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        transform: translateY(-5px);
        box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
    }

.footer-section h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 12px;
}

    .footer-section h3::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 40px;
        height: 3px;
        background: linear-gradient(to right, #667eea, #764ba2);
        border-radius: 10px;
    }

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

    .footer-links li {
        margin-bottom: 12px;
    }

    .footer-links a {
        color: rgba(255,255,255,0.8);
        text-decoration: none;
        font-size: 15px;
        transition: all 0.3s ease;
        display: inline-block;
    }

        .footer-links a:hover {
            color: white;
            padding-left: 8px;
        }

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 18px;
    color: rgba(255,255,255,0.8);
    font-size: 15px;
    line-height: 1.6;
}

.contact-icon {
    font-size: 20px;
    margin-top: 2px;
    flex-shrink: 0;
}

.newsletter {
    margin-top: 25px;
}

.newsletter-form {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

.newsletter-input {
    flex: 1;
    padding: 12px 20px;
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 25px;
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    color: white;
    font-size: 14px;
    outline: none;
    transition: all 0.3s ease;
}

    .newsletter-input::placeholder {
        color: rgba(255,255,255,0.6);
    }

    .newsletter-input:focus {
        border-color: #667eea;
        background: rgba(255,255,255,0.15);
    }

.newsletter-btn {
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    white-space: nowrap;
}

    .newsletter-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
    }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-copyright {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
}

.footer-payment {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

.payment-icon {
    width: 50px;
    height: 32px;
    background: white;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    opacity: 0.9;
    transition: all 0.3s ease;
}

    .payment-icon:hover {
        opacity: 1;
        transform: translateY(-3px);
    }

/* 回到頂部按鈕 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 55px;
    height: 55px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 24px;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
    z-index: 999;
}

    .back-to-top:hover {
        transform: translateY(-5px);
        box-shadow: 0 10px 30px rgba(102, 126, 234, 0.6);
    }

    .back-to-top.visible {
        display: flex;
    }

/* RWD 響應式設計 */
@media (max-width: 992px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    .footer-brand {
        grid-column: 1 / -1;
        padding-right: 0;
    }
}

@media (max-width: 576px) {
    .modern-footer {
        margin-top: 60px;
    }

    .footer-wave {
        top: -50px;
        height: 50px;
    }

    .footer-container {
        padding: 60px 20px 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-brand {
        grid-column: 1;
        padding-right: 0;
    }

    .newsletter-form {
        flex-direction: column;
    }

    .newsletter-btn {
        width: 100%;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .footer-payment {
        justify-content: center;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
}