:root{
    --bg:#111111;
    --bg-2:#161616;
    --bg-3:#1d1d1d;
    --gold:#e0aa3e;
    --gold-2:#f0c568;
    --gold-dim:#8a6d2b;
    --text:#eaeaea;
    --text-dim:#9a9a9a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    background:var(--bg);
    color:var(--text);
    font-family:'Noto Sans KR','Noto Sans CJK KR',sans-serif;
    font-weight:400;
    overflow-x:hidden;
}
::selection{background:var(--gold);color:#000}

::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:#0b0b0b}
::-webkit-scrollbar-thumb{background:#3a3a3a;border-radius:5px}
::-webkit-scrollbar-thumb:hover{background:var(--gold-dim)}

/* ---------- nav ---------- */
.navbar-cf{
    background:rgba(10,10,10,.25);
    backdrop-filter:blur(10px);
    border-bottom:1px solid rgba(224,170,62,.15);
    transition:background .4s ease;
}
.navbar-cf.scrolled{background:rgba(8,8,8,.92)}
.brand-logo{height:34px}
.nav-cf-link{
    color:#ffffff !important;
    font-size:.9rem;
    margin:0 .35rem;
    position:relative;
    transition:color .3s ease;
}
.nav-cf-link::after{
    content:"";position:absolute;left:0;bottom:4px;height:2px;width:0;
    background:var(--gold);transition:width .35s ease;
}
.nav-cf-link:hover{color:var(--gold-2)!important}
.nav-cf-link:hover::after{width:100%}

/* ---------- hero : 背景大图 + 一个按钮 ---------- */
.hero{
    position:relative;
    min-height:90vh;
    display:flex;align-items:center;justify-content:center;
    background:url('../img/bg.webp') center/cover no-repeat;
    overflow:hidden;
}
.hero::before{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg, rgba(0, 0, 0, .01) 0%, rgba(0, 0, 0, .1) 93%, rgba(17, 17, 17, 1) 100%);;
}
.hero-btn-wrap{position:relative;z-index:2;text-align:center;padding-top:68vh}
.btn-gold{
    background:linear-gradient(120deg,#f0c568,#cb8d1a);
    color:#ffffff;;
    border:none;
    font-weight:700;
    padding:1.25rem 3rem;
    border-radius:50rem;
    letter-spacing:.05em;
    font-size:1.25rem;
    box-shadow:0 8px 26px rgba(224,170,62,.4);
    transition:transform .3s ease,box-shadow .3s ease,filter .3s ease;
    animation:fadeUp 1.2s ease .5s both;
}
.btn-gold:hover{
    transform:translateY(-3px) scale(1.03);
    filter:brightness(1.08);
    box-shadow:0 14px 36px rgba(224,170,62,.55);
    color:#000;
}
.btn-gold:active{transform:translateY(-1px) scale(1)}
.btn-outline-gold{
    background:transparent;
    color:var(--gold-2);
    border:1px solid var(--gold-dim);
    border-radius:50rem;
    padding:.8rem 2.2rem;
    font-weight:500;
    transition:all .3s ease;
}
.btn-outline-gold:hover{
    background:rgba(224,170,62,.12);
    color:var(--gold-2);
    border-color:var(--gold);
    transform:translateY(-2px);
}

/* ---------- section base ---------- */
.section{padding:150px 0;    margin: 100px 0;}
.section-alt{background:var(--bg-2)}
.sec-label{
    color:var(--gold);
    letter-spacing:.4em;
    font-size:.78rem;
    text-transform:uppercase;
    font-weight:500;
}
.sec-title{
    font-weight:900;
    font-size:clamp(1.7rem,3.6vw,2.6rem);
    margin:.5rem 0 .8rem;
}
.sec-desc{color:#eeeeee;font-weight:300;max-width:680px;margin:0 auto}
.gold-divider{
    width:150px;height:3px;margin:1.1rem auto 0;
    background:linear-gradient(90deg,transparent,var(--gold),transparent);
}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(36px);transition:opacity .8s ease,transform .8s ease}
.reveal.visible{opacity:1;transform:none}
.reveal.d1{transition-delay:.1s}.reveal.d2{transition-delay:.22s}.reveal.d3{transition-delay:.34s}.reveal.d4{transition-delay:.46s}

/* ---------- overview ---------- */
.ov-card{
    background:var(--bg-3);
    border:1px solid #2b2b2b;
    border-radius:16px;
    padding:2.6rem 1.4rem 2.2rem;
    height:100%;
    text-align:center;
    transition:transform .4s ease,border-color .4s ease,box-shadow .4s ease;
}
.ov-card:hover{
    transform:translateY(-8px);
    border-color:rgba(224,170,62,.5);
    box-shadow:0 18px 40px rgba(0,0,0,.45);
}
.ov-num{
    font-size:3.4rem;font-weight:900;line-height:1;
    background:linear-gradient(180deg, #f5ae00 10%, #362403 90%);;
    -webkit-background-clip:text;background-clip:text;
    -webkit-text-fill-color:transparent;
    filter:drop-shadow(0 4px 14px rgba(224,170,62,.25));
}
.ov-card h5{font-weight:700;margin:1.1rem 0 .7rem;font-size:1.5rem}
.ov-date{color:var(--gold-2);font-weight:500;font-size:1.5rem}
.ov-sub{color:var(--gold-dim);font-size:.8rem;margin-top:.7rem}

/* ---------- prize cards ---------- */
.prize-card{
    background:linear-gradient(160deg,#202020,#171717);
    border:1px solid rgba(224,170,62,.18);
    border-radius:18px;
    padding:1.6rem 1.2rem;
    height:100%;
    text-align:center;
    display:flex;flex-direction:column;
    transition:transform .4s ease,border-color .4s ease,box-shadow .4s ease;
}
.prize-card:hover{transform:translateY(-8px) scale(1.02);border-color:rgba(224,170,62,.6);box-shadow:0 20px 44px rgba(0,0,0,.5)}
.prize-tag{font-size:.8rem;color:var(--gold-2);font-weight:700;letter-spacing:.1em}
.prize-img{
    width:100%;
    border-radius:12px;margin:1rem 0;
    /*border:1px solid rgba(255,255,255,.06);*/
    transition:transform .5s ease;
}
.prize-card:hover .prize-img{transform:scale(1.04)}
.prize-name{font-weight:700;font-size:.95rem;min-height:2.6em}
.prize-count{color:var(--gold-2);font-size:.85rem;margin-top:auto;padding-top:.5rem}

/* ---------- flow ---------- */
.flow-wrap{display:flex;flex-wrap:wrap;justify-content:center;gap:0;margin:0 auto 4rem}
.flow-step{
    display:flex;align-items:center;
    padding:1rem 1.8rem;
    /*border:1px solid rgba(224,170,62,.35);*/
    color:#ffffff;
    font-size:1rem;
    background:#282828;
    clip-path:polygon(0 0,calc(100% - 14px) 0,100% 50%,calc(100% - 14px) 100%,0 100%,14px 50%);
    /*margin:4px -7px;*/
    transition:all .35s ease;
}
.flow-step:first-child{clip-path:polygon(0 0,calc(100% - 14px) 0,100% 50%,calc(100% - 14px) 100%,0 100%)}
.flow-step .num{color:var(--gold);font-weight:900;margin-right:.8rem;font-size: 2rem}
.flow-step:hover{background:rgba(224,170,62,.15);color:#fff}
.flow-step.active{background:linear-gradient(120deg,#f0c568,#d99a25);color:#1a1206;font-weight:700}
.flow-step.active .num{color:#1a1206}

/* ---------- howto : 整幅横条卡片，上下排列 ---------- */
.how-card{
    background:var(--bg-3);
    border:1px solid rgba(224,170,62,.18);
    border-radius:14px;
    padding:1.9rem 2rem;
    transition:transform .4s ease,border-color .4s ease,box-shadow .4s ease;
}
.how-card:hover{transform:translateY(-4px);border-color:rgba(224,170,62,.5);box-shadow:0 16px 38px rgba(0,0,0,.45)}
.how-head{display:flex;align-items:center;gap:.9rem;margin-bottom:.8rem}
.how-badge{
    display:inline-flex;align-items:center;justify-content:center;
    width:30px;height:30px;border-radius:50%;flex:none;
    background:linear-gradient(120deg,#f0c568,#d99a25);
    color:#1a1206;font-weight:900;font-size:.85rem;
}
.how-head h6{font-weight:700;color:var(--gold);margin:0;font-size:1rem}
.how-card p{color:var(--text);font-size:.9rem;font-weight:300;line-height:1.8;margin-bottom:.4rem}
.spec-chip{
    display:inline-block;font-size:.75rem;color:#d8d8d8;
    border:1px solid rgba(224,170,62,.35);border-radius:6px;
    padding:.15rem .55rem;margin:.2rem .2rem 0 0;
}

/* ---------- theme cards ---------- */
.theme-card{
    position:relative;
    border-radius:16px;
    overflow:hidden;
    border:1px solid rgba(224,170,62,.2);
    transition:transform .45s ease,box-shadow .45s ease;
}
.theme-card:hover{transform:translateY(-10px);box-shadow:0 22px 48px rgba(0,0,0,.55)}
.theme-card img{width:100%;display:block;transition:transform .6s ease}
.theme-card:hover img{transform:scale(1.07)}
.theme-label{
    position:absolute;top:12px;left:12px;
    background:rgba(0,0,0,.65);backdrop-filter:blur(4px);
    color:var(--gold-2);font-size:.72rem;font-weight:700;letter-spacing:.12em;
    padding:.25rem .7rem;border-radius:50rem;border:1px solid rgba(224,170,62,.4);
}
.theme-body{
    position:absolute;left:0;right:0;bottom:0;
    padding:1rem;
    background:linear-gradient(180deg,transparent,rgba(0,0,0,.92) 55%);
}
.theme-body h6{font-weight:900;letter-spacing:.06em;margin:0}
.theme-body small{color:var(--text-dim)}
.theme-kw{display:flex;flex-wrap:wrap;gap:.3rem;margin-top:.5rem}
.theme-kw span{
    font-size:.68rem;color:#ddd;background:rgba(255,255,255,.1);
    padding:.12rem .5rem;border-radius:50rem;
}

/* ---------- faq ---------- */
.accordion-item{
    background:var(--bg-3);
    border:1px solid rgba(224,170,62,.18)!important;
    border-radius:12px!important;
    overflow:hidden;
    margin-bottom:.8rem;
}
.accordion-button{
    background:var(--bg-3);
    color:var(--text);
    font-weight:500;
    padding:1.05rem 1.3rem;
    transition:background .3s ease,color .3s ease;
}
.accordion-button:not(.collapsed){
    background:rgba(224,170,62,.1);
    color:var(--gold-2);
    box-shadow:none;
}
.accordion-button:focus{box-shadow:0 0 0 2px rgba(224,170,62,.25);border:none}
.accordion-button::after{
    background-image:url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23e0aa3e'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
    transition:transform .35s ease;
}
.accordion-body{color:var(--text);font-weight:300;font-size:.92rem;line-height:1.8}
.btn-criteria{
    background:linear-gradient(120deg,#f0c568,#d99a25);
    color:#1a1206;border:none;border-radius:8px;
    font-weight:700;font-size:.82rem;padding:.45rem 1.1rem;
    transition:transform .3s ease,filter .3s ease;
}
.btn-criteria:hover{transform:translateY(-2px);filter:brightness(1.08);color:#000}

/* ---------- footer ---------- */
footer{background:#0c0c0c;border-top:1px solid rgba(224,170,62,.15);padding:200px 0 100px}
.fb-icon{
    width:71px;height:71px;
    display:inline-flex;align-items:center;justify-content:center;
    transition:all .35s ease;
}
.fb-icon img{width:71px;height:71px;object-fit:contain}
.fb-icon:hover{transform:translateY(-4px) scale(1.06);border-color:var(--gold);box-shadow:0 10px 24px rgba(224,170,62,.25)}
.foot-note{color:#6f6f6f;font-size:.8rem;font-weight:300}
.foot-logo{height:66px;margin:5rem auto 3rem;}

/* ---------- modal ---------- */
.modal-content{
    background:#1c1c1c;
    border:1px solid rgba(224,170,62,.35);
    border-radius:16px;
    color:var(--text);
}
.modal-header{border-bottom:1px solid rgba(224,170,62,.18)}
.modal-title{font-weight:700}
.btn-close{filter:invert(1) grayscale(100%) brightness(200%)}
.modal .form-label{font-size:.88rem;font-weight:500;color:#ddd}
.modal .form-control,.modal .form-select{
    background:#141414;
    border:1px solid #3a3a3a;
    color:var(--text);
    transition:border-color .3s ease,box-shadow .3s ease;
}
.modal .form-control:focus,.modal .form-select:focus{
    background:#141414;color:#fff;
    border-color:var(--gold);
    box-shadow:0 0 0 .2rem rgba(224,170,62,.18);
}
.modal .form-control::placeholder{color:#5f5f5f}
.modal .form-text{color:#8a8a8a;font-size:.78rem}
.btn-redeem{
    background:linear-gradient(120deg,#f0c568,#d99a25);
    color:#1a1206;border:none;font-weight:700;
    transition:transform .3s ease,filter .3s ease;
}
.btn-redeem:hover{transform:translateY(-2px);filter:brightness(1.08);color:#000}
.btn-cancel{
    background:#3a3a3a;color:#ddd;border:none;
    transition:background .3s ease;
}
.btn-cancel:hover{background:#4a4a4a;color:#fff}
.file-caption{display:none}          /* 只隐藏文件名输入栏 */
.kv-upload-progress{display:none}    /* 隐藏自带进度条（用不到） */

/* radio */
.series-radio .form-check{
    background:#161616;
    border:1px solid #333;
    border-radius:10px;
    padding:.65rem .9rem .65rem 2.4rem;
    margin-bottom:.5rem;
    transition:border-color .3s ease,background .3s ease;
    cursor:pointer;
}
.series-radio .form-check:hover{border-color:var(--gold-dim)}
.series-radio .form-check-input{
    background-color:#141414;
    border-color:#4a4a4a;
    margin-top:.2rem;
    cursor:pointer;
}
.series-radio .form-check-input:checked{
    background-color:var(--gold);
    border-color:var(--gold);
}
.series-radio .form-check-input:focus{
    box-shadow:0 0 0 .2rem rgba(224,170,62,.18);
    border-color:var(--gold);
}
.series-radio .form-check:has(.form-check-input:checked){
    border-color:var(--gold);
    background:rgba(224,170,62,.08);
}
.series-radio .form-check-label{color:#cfcfcf;font-size:.9rem;cursor:pointer}

/* ---------- criteria table : 深色 + 行间隔 ---------- */
.table-criteria{
    color:var(--text);
    font-size:.88rem;
    margin:0;
    border-collapse:separate;
    border-spacing:0 .55rem;
}
.table-criteria thead th{
    background:rgba(224,170,62,.16)!important;
    color:var(--gold-2);
    font-weight:700;
    border:none!important;
    padding:.8rem 1.1rem;
}
.table-criteria thead th:first-child{border-radius:10px 0 0 10px}
.table-criteria thead th:last-child{border-radius:0 10px 10px 0}
.table-criteria tbody tr{transition:transform .3s ease,background .3s ease}
.table-criteria tbody tr:hover{transform:scale(1.012)}
.table-criteria tbody td{
    background:#242424;
    border:none!important;
    color:#cfcfcf;
    font-weight:300;
    vertical-align:middle;
    padding:.9rem 1.1rem;
}
.table-criteria tbody tr:nth-child(even) td{background:#1f1f1f}
.table-criteria tbody td:first-child{
    border-radius:10px 0 0 10px;
    color:#fff;font-weight:700;
}
.table-criteria tbody td:last-child{border-radius:0 10px 10px 0}
.table-criteria td.score{color:var(--gold-2);font-weight:700;white-space:nowrap}

/* ---------- animations ---------- */
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:none}}
.modal.fade .modal-dialog{transition:transform .35s ease-out}
@media (max-width:576px){
    .section{padding:64px 0}
    .flow-step{font-size:.72rem;padding:.55rem .8rem}
    .hero-btn-wrap{padding-top:42vh}
}