.side_box {
    margin: 0 auto;
    padding: 100px 40px;
    display: flex;
    gap: 0;
    align-items: flex-start;
}
.side_box2 {
    margin: 0 auto;
    padding: 100px 40px 50px 0;
    display: flex;
    gap: 0;
    align-items: flex-start;
    width: 100%;
}

.side_k, .side_k3 {
    flex: 0 0 35%;
    position: sticky;
    top: 100px;
}

.side_k2 {
  padding-top:100px;
  margin-left: 40px;
}
.side_k4 {
  padding-top:50px !important;
  margin-left:0 !important;
}

.side_k h2, .side_k2 h2 {
    font-size: 4em;
    color: #1a1a1a;
    margin-bottom: 30px;
    font-weight: 300;
    letter-spacing: -2px;
    position: relative;
}
.side_k3 h2 {
    font-size: 4em;
    color: #1a1a1a;
    margin-bottom: 30px;
    font-weight: 300;
    letter-spacing: -2px;
    position: relative;
    text-align: right;
}
.fc_1 {
  color:#e63946;
  font-weight: bold;
}
.fc_2 {
  color:#1D6CDB;
  font-weight: bold;
}
.fc_3 {
  color:#a50319;
}

.side_k h2::after, .side_k2 h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 0;
    width: 80px;
    height: 3px;
    background: #e63946;
}
.side_k3 h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    right: 0;
    width: 80px;
    height: 3px;
    background: #1D6CDB;
}

.side_k p, .side_k2 p {
    font-size: 1.1em;
    color: #666;
    line-height: 1.8;
    font-weight: 300;
    margin-top: 50px;
    letter-spacing: -0.3px;
    word-break: keep-all;
}
.side_k3 p {
    font-size: 1.1em;
    color: #666;
    line-height: 1.8;
    font-weight: 300;
    margin-top: 50px;
    letter-spacing: -0.3px;
    text-align: right;
}

.content {
    flex: 0 0 65%;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.grid2 {
    width: 100%;
    max-width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    box-sizing: border-box;
}


.card {
    background: #ffffff;
    border: 1px solid #e8e8e8;
    border-radius: 24px;
    padding: 60px 35px;
    text-align: center;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.03);
}

.txt_a_r {
  text-align: right;
  color: #1D6CDB !important;
}
.txt_a_r a {
  color: #1D6CDB !important;
}
.txt_a_r a::after {
    background-color: rgba(29, 108, 219, 1) !important;
}
.sdlink {
  margin-top:20px;
}
.sdlink a {
    position: relative;
    display: inline-block;
    text-decoration: none;
    padding-bottom: 5px;
    color:#e63946;
}

.sdlink a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: rgba(230, 57, 70, 1);
    transition: width 0.4s ease;
}

.sdlink a:hover::after {
    width: 100%;
}
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: #e63946;
    transform: scaleX(0);
    transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
    transform-origin: left;
}
.card2::before {
    background: #1D6CDB;
}

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

.card::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(230, 57, 70, 0.03) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    transition: all 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}
.card2::after {
    background: radial-gradient(circle, rgba(29, 108, 219, 0.03) 0%, transparent 70%);
}

.card:hover::after {
    width: 600px;
    height: 600px;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(230, 57, 70, 0.12);
    border-color: rgba(230, 57, 70, 0.2);
}

.card2:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(29, 108, 219, 0.12);
    border-color:rgba(29, 108, 219, 0.2);
}



.card-number {
    position: absolute;
    top: 25px;
    right: 25px;
    font-size: 4em;
    font-weight: 100;
    color: #f5f5f5;
    z-index: 1;
    transition: all 0.5s;
}


.card:hover .card-number {
    color: rgba(230, 57, 70, 0.1);
}
.card2:hover .card-number2 {
    color: rgba(29, 108, 219, 0.1);
}
.card-content {
    position: relative;
    z-index: 2;
}

.card-title {
    font-size: 1.6em;
    font-weight: 400;
    color: #1a1a1a;
    margin-bottom: 20px;
    letter-spacing: -1px;
    transition: all 0.4s;
}
.card-title2 {
    font-size:2em;
    font-weight: 400;
    color: #1a1a1a;
    margin-bottom: 20px;
    letter-spacing: -1px;
    transition: all 0.4s;
}

.card:hover .card-title {
    color: #e63946;
    transform: translateY(-5px);
}

.card2:hover .st_blue {
    color: #1D6CDB !important;
    transform: translateY(-5px);
}

.card-subtitle {
    font-size: 0.9em;
    color: #999;
    margin-bottom: 35px;
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
    transition: all 0.4s;
}
.card-subtitle2 {
    font-size: 1.1em;
    color: #666;
    margin-bottom: 15px;
    word-break: keep-all;
}

.card:hover .card-subtitle {
    color: #666;
}

.card-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: #1a1a1a;
    color: white;
    border-radius: 5px;
    font-size: 0.75em;
    font-weight: 500;
    margin-top: 30px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    transition: all 0.4s;
    border: 1px solid #1a1a1a;
}
.card-badge2 {
  background: #e63946;
  border-color: #e63946;
}

.card:hover .card-badge {
    background: #e63946;
    border-color: #e63946;
    transform: translateY(5px);
}

.card2:hover .st_blue2 {
    background: #1D6CDB;
    border-color: #1D6CDB;
    transform: translateY(5px);
}


.card-badge::after {
  content: "\f105";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  margin-left: 6px;
  transition: transform 0.2s;
}

.card-badge:hover::after {
  transform: translateX(3px);
}


@media (max-width: 1400px) {
    .side_k {
        flex: 0 0 25%;
    }
    .side_k2 {
      padding-top:10px;
      margin-left: 20px;
    }

    .content {
        flex: 0 0 75%;
    }
    .side_k4 {
      padding-top:10px !important;
      margin-left:20px !important;
    }

}

@media (max-width: 1200px) {
    .side_box {
        flex-direction: column;
        padding: 80px 40px;
        gap:0 !important;
    }
    .side_box2 {
        margin: 0 auto;
        padding: 50px 40px;
        display: flex;
        gap: 0;
        align-items: flex-start;
        width: 100%;
    }

    .side_k {
        flex: auto;
        width: 100%;
        position: static;
        margin-bottom: 60px;
    }

    .content {
        flex: auto;
        width: 100%;
    }
    .side_k p {
        font-size:1.1em;
        margin-top: 40px;
    }

    .grid, .grid2 {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    .side_box3 {
        flex-direction: column-reverse; /* 순서 반전 */
    }
    .side_k3 h1, .side_k3 p  {
      text-align: left;
    }
    .side_k3 h1::after {
      left:0 !important;
    }
    .txt_a_r {
      text-align: left;
      margin-bottom:50px;
    }
}

@media (max-width: 768px) {
    .side_box {
        padding: 60px 20px;
        gap:0 !important;
    }
    .side_box2 {
        margin: 0 auto;
        padding: 50px 20px;
        display: flex;
        gap: 0;
        align-items: flex-start;
        width: 100%;
    }

    .side_k {
        margin-bottom: 50px;
    }

    .side_k h1::after {
        width: 60px;
    }



    .grid ,.grid2 {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .card {
        padding: 60px 40px;
        border-radius: 20px;
    }

    .card-title {
        font-size: 1.6em;
    }

    .card-number {
        font-size: 3em;
        top: 25px;
        right: 25px;
    }

    .card-subtitle {
        font-size: 0.85em;
    }

    .card-badge {
        padding: 8px 24px;
        font-size: 0.7em;
    }
}

@media (max-width: 480px) {
    .fc_1{
      display: block;
    }

    .fc_2 {
      display: block;
    }
    .side_box {
        padding: 40px 20px;
    }

    .side_k h1 {
        font-size: 2.5em;
    }

    .card {
        padding: 50px 30px;
        border-radius: 16px;
    }

    .card-title {
        font-size: 1.4em;
    }

    .card-number {
        font-size: 2.5em;
        top: 20px;
        right: 20px;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeInUp 0.8s cubic-bezier(0.23, 1, 0.32, 1) backwards;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }
.card:nth-child(5) { animation-delay: 0.5s; }
.card:nth-child(6) { animation-delay: 0.6s; }

.side_k {
    animation: fadeInUp 0.8s cubic-bezier(0.23, 1, 0.32, 1) backwards;
}