* {
    box-sizing:border-box;
}

body {
    margin:0;
    font-family:"Malgun Gothic","¸¼Àº °íµñ",Dotum,sans-serif;
    color:#0f172a;
    background:#f8fafc;
}

a {
    text-decoration:none;
    color:inherit;
}

img {
    max-width:100%;
    border:0;
}

.intro_page {
    overflow:hidden;
}

.intro_header {
    position:fixed;
    left:0;
    top:0;
    width:100%;
    z-index:100;
    background:rgba(255,255,255,.82);
    border-bottom:1px solid rgba(226,232,240,.8);
}

.header_inner {
    max-width:1240px;
    height:78px;
    margin:0 auto;
    padding:0 28px;
    display:flex;
    align-items:center;
    justify-content:space-between;
}

.intro_logo {
    font-size:28px;
    font-weight:900;
    color:#2563eb;
    letter-spacing:-1px;
}

.intro_logo span {
    color:#0f172a;
    margin-left:4px;
}

.intro_nav a {
    display:inline-block;
    padding:11px 18px;
    margin-left:5px;
    font-size:15px;
    font-weight:700;
    color:#334155;
    border-radius:999px;
}

.intro_nav a:hover {
    background:#eff6ff;
    color:#2563eb;
}

.intro_nav .nav_join {
    background:#2563eb;
    color:#fff;
}

.hero_section {
    position:relative;
    padding:160px 28px 90px;
    background:
        radial-gradient(circle at 80% 15%, #dbeafe 0, transparent 36%),
        linear-gradient(135deg,#ffffff 0%,#f8fbff 45%,#eef6ff 100%);
}

.hero_inner {
    position:relative;
    z-index:2;
    max-width:1240px;
    margin:0 auto;
    display:flex;
    align-items:center;
    gap:70px;
}

.hero_text {
    width:52%;
}

.hero_label {
    display:inline-block;
    margin:0 0 22px;
    padding:9px 16px;
    border-radius:999px;
    background:#eff6ff;
    color:#2563eb;
    font-weight:900;
    font-size:15px;
}

.hero_text h1 {
    margin:0;
    font-size:50px;
    line-height:1.18;
    letter-spacing:-3px;
    color:#0f172a;
}

.hero_desc {
    margin:26px 0 0;
    font-size:20px;
    line-height:1.75;
    color:#475569;
    letter-spacing:-.5px;
}

.keyword_group {
    margin-top:28px;
}

.keyword_group span {
    display:inline-block;
    margin:0 7px 8px 0;
    padding:9px 15px;
    border-radius:999px;
    background:#fff;
    border:1px solid #dbe4f0;
    color:#334155;
    font-weight:700;
    box-shadow:0 6px 16px rgba(15,23,42,.05);
    cursor: pointer;
}

.hero_btns {
    margin-top:38px;
}

.hero_btns a {
    display:inline-block;
    min-width:158px;
    padding:17px 26px;
    margin-right:8px;
    border-radius:999px;
    text-align:center;
    font-weight:900;
    font-size:16px;
}

.btn_primary {
    background:#2563eb;
    color:#fff;
    box-shadow:0 16px 30px rgba(37,99,235,.28);
}

.btn_primary:hover {
    background:#1d4ed8;
}

.btn_light {
    background:#fff;
    color:#2563eb;
    border:1px solid #bfdbfe;
}

.hero_visual {
    position:relative;
    width:48%;
    min-height:500px;
}

.device_card {
    position:absolute;
    right:20px;
    top:45px;
    width:430px;
    padding:24px;
    border-radius:34px;
    background:rgba(255,255,255,.72);
    border:1px solid rgba(255,255,255,.9);
    box-shadow:0 30px 70px rgba(15,23,42,.18);
}

.device_card img {
    display:block;
    border-radius:24px;
}

.floating_book {
    position:absolute;
    width:155px;
    padding:14px;
    border-radius:24px;
    background:#fff;
    box-shadow:0 20px 50px rgba(15,23,42,.16);
    animation:floating 3.8s ease-in-out infinite;
}

.book_01 {
    left:5px;
    top:20px;
}

.book_02 {
    right:5px;
    bottom:48px;
    animation-delay:.8s;
}

.floating_note {
    position:absolute;
    left:35px;
    bottom:70px;
    width:240px;
    padding:22px;
    border-radius:24px;
    background:#0f172a;
    color:#fff;
    box-shadow:0 22px 50px rgba(15,23,42,.24);
    animation:floating 4.2s ease-in-out infinite;
}

.floating_note strong {
    display:block;
    font-size:22px;
    margin-bottom:8px;
}

.floating_note span {
    color:#cbd5e1;
    font-size:14px;
}

.bg_circle {
    position:absolute;
    border-radius:50%;
    filter:blur(20px);
    opacity:.55;
}

.circle_01 {
    width:280px;
    height:280px;
    right:8%;
    top:160px;
    background:#93c5fd;
}

.circle_02 {
    width:180px;
    height:180px;
    left:6%;
    bottom:80px;
    background:#bae6fd;
}

.stats_section {
    position:relative;
    margin-top:-36px;
    padding:0 28px 80px;
    z-index:5;
}

.stats_inner {
    max-width:1120px;
    margin:0 auto;
    display:grid;
    grid-template-columns:repeat(4,1fr);
    background:#fff;
    border-radius:30px;
    box-shadow:0 20px 60px rgba(15,23,42,.11);
    overflow:hidden;
}

.stat_item {
    padding:34px 20px;
    text-align:center;
    border-right:1px solid #e2e8f0;
}

.stat_item:last-child {
    border-right:0;
}

.stat_item strong {
    display:block;
    font-size:36px;
    color:#2563eb;
    font-weight:900;
}

.stat_item strong:after {
    content:"+";
}

.stat_item:nth-child(4) strong:after {
    content:"%";
}

.stat_item span {
    display:block;
    margin-top:8px;
    color:#64748b;
    font-weight:700;
}

.feature_section {
    max-width:1240px;
    margin:0 auto;
    padding:30px 28px 100px;
}

.section_title {
    text-align:center;
    margin-bottom:42px;
}

.section_title p {
    margin:0 0 10px;
    color:#2563eb;
    font-weight:900;
}

.section_title h2 {
    margin:0;
    font-size:38px;
    letter-spacing:-1.5px;
}

.feature_grid {
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:22px;
}

.feature_card {
    position:relative;
    min-height:250px;
    padding:34px 28px;
    background:#fff;
    border:1px solid #e2e8f0;
    border-radius:28px;
    box-shadow:0 12px 36px rgba(15,23,42,.06);
    transition:all .25s ease;
}

.feature_card:hover {
    transform:translateY(-8px);
    box-shadow:0 24px 60px rgba(15,23,42,.12);
}

.feature_card em {
    display:inline-block;
    margin-bottom:30px;
    padding:9px 13px;
    border-radius:999px;
    background:#eff6ff;
    color:#2563eb;
    font-style:normal;
    font-weight:900;
}

.feature_card h3 {
    margin:0 0 14px;
    font-size:24px;
}

.feature_card p {
    margin:0;
    color:#64748b;
    line-height:1.65;
}

.search_section {
    padding:95px 28px;
    background:linear-gradient(135deg,#0f172a,#1e3a8a);
}

.search_box {
    max-width:980px;
    margin:0 auto;
    text-align:center;
    color:#fff;
}

.search_box p {
    margin:0 0 10px;
    color:#bfdbfe;
    font-weight:900;
}

.search_box h2 {
    margin:0 0 34px;
    font-size:38px;
    letter-spacing:-1.5px;
}

.intro_search_form {
    max-width:760px;
    margin:0 auto;
    padding:8px;
    display:flex;
    background:#fff;
    border-radius:999px;
    box-shadow:0 24px 60px rgba(0,0,0,.24);
}

.intro_search_form input {
    flex:1;
    height:58px;
    padding:0 24px;
    border:0;
    outline:none;
    font-family:"Malgun Gothic","¸¼Àº °íµñ",Dotum,sans-serif;
    font-size:17px;
}

.intro_search_form button {
    width:128px;
    height:58px;
    border:0;
    border-radius:999px;
    background:#2563eb;
    color:#fff;
    font-family:"Malgun Gothic","¸¼Àº °íµñ",Dotum,sans-serif;
    font-weight:900;
    font-size:17px;
    cursor:pointer;
}

.problem_section {
    padding:100px 28px;
    background:#f8fafc;
}

.problem_inner {
    max-width:1120px;
    margin:0 auto;
    display:flex;
    gap:60px;
    align-items:flex-start;
}

.problem_title {
    width:34%;
}

.problem_title p {
    margin:0 0 10px;
    color:#2563eb;
    font-weight:900;
}

.problem_title h2 {
    margin:0;
    font-size:38px;
    line-height:1.28;
    letter-spacing:-1.5px;
}

.problem_list {
    flex:1;
}

.problem_item {
    margin-bottom:16px;
    padding:24px 28px;
    background:#fff;
    border:1px solid #e2e8f0;
    border-radius:22px;
    color:#334155;
    font-size:18px;
    line-height:1.6;
    box-shadow:0 12px 34px rgba(15,23,42,.05);
}

.cta_section {
    margin:0 28px 80px;
    padding:80px 28px;
    text-align:center;
    border-radius:36px;
    background:
        radial-gradient(circle at 20% 20%, rgba(147,197,253,.4), transparent 30%),
        linear-gradient(135deg,#2563eb,#0ea5e9);
    color:#fff;
}

.cta_section h2 {
    margin:0 0 16px;
    font-size:40px;
    letter-spacing:-1.5px;
}

.cta_section p {
    margin:0 0 34px;
    font-size:18px;
    color:#dbeafe;
}

.cta_section a {
    display:inline-block;
    padding:17px 32px;
    border-radius:999px;
    background:#fff;
    color:#2563eb;
    font-weight:900;
}

.intro_footer {
    padding:34px 20px;
    text-align:center;
    color:#64748b;
    border-top:1px solid #e2e8f0;
}

@keyframes floating {
    0% {
        transform:translateY(0);
    }
    50% {
        transform:translateY(-16px);
    }
    100% {
        transform:translateY(0);
    }
}

@media screen and (max-width:1024px) {
    .hero_inner {
        display:block;
    }

    .hero_text,
    .hero_visual {
        width:100%;
    }

    .hero_visual {
        margin-top:50px;
    }

    .feature_grid {
        grid-template-columns:repeat(2,1fr);
    }

    .stats_inner {
        grid-template-columns:repeat(2,1fr);
    }

    .stat_item:nth-child(2) {
        border-right:0;
    }

    .stat_item:nth-child(1),
    .stat_item:nth-child(2) {
        border-bottom:1px solid #e2e8f0;
    }

    .problem_inner {
        display:block;
    }

    .problem_title {
        width:100%;
        margin-bottom:30px;
    }
}

@media screen and (max-width:768px) {
    .header_inner {
        height:auto;
        padding:18px;
        display:block;
    }

    .intro_logo {
        display:block;
        margin-bottom:12px;
        font-size:24px;
    }

    .intro_nav a {
        margin:0 4px 6px 0;
        padding:9px 13px;
        font-size:13px;
    }

    .hero_section {
        padding:150px 18px 60px;
    }

    .hero_text h1 {
        font-size:36px;
        letter-spacing:-1.5px;
    }

    .hero_desc {
        font-size:17px;
    }

    .hero_btns a {
        display:block;
        margin:0 0 10px;
    }

    .hero_visual {
        min-height:390px;
    }

    .device_card {
        position:relative;
        right:auto;
        top:auto;
        width:100%;
    }

    .floating_book {
        width:110px;
    }

    .book_01 {
        left:0;
        top:-24px;
    }

    .book_02 {
        right:0;
        bottom:20px;
    }

    .floating_note {
        left:12px;
        bottom:18px;
        width:210px;
    }

    .stats_section {
        padding:0 18px 60px;
    }

    .stats_inner {
        grid-template-columns:1fr;
    }

    .stat_item {
        border-right:0;
        border-bottom:1px solid #e2e8f0;
    }

    .stat_item:last-child {
        border-bottom:0;
    }

    .feature_section {
        padding:20px 18px 70px;
    }

    .section_title h2,
    .search_box h2,
    .problem_title h2,
    .cta_section h2 {
        font-size:28px;
    }

    .feature_grid {
        grid-template-columns:1fr;
    }

    .search_section {
        padding:70px 18px;
    }

    .intro_search_form {
        display:block;
        padding:10px;
        border-radius:24px;
    }

    .intro_search_form input {
        width:100%;
        height:54px;
    }

    .intro_search_form button {
        width:100%;
        margin-top:8px;
    }

    .problem_section {
        padding:70px 18px;
    }

    .problem_item {
        font-size:16px;
    }

    .cta_section {
        margin:0 18px 60px;
        padding:58px 20px;
    }
}