/* KOIBET4D — 锦鲤涟漪 koi-ripple hero + 卡片流. 墨水蓝 #101C24 × 锦鲤橙 #FFA45C */
:root{
  --bg:#101C24;--panel:#16262F;--panel2:#1B2F3A;--text:#F3EDE4;--muted:#9FB6BE;
  --neon:#FFA45C;--ice:#FFD9B0;--aqua:#7FB6C9;
  --glow:0 0 12px rgba(255,164,92,.4),0 0 26px rgba(255,164,92,.2);
  --grad-panel:linear-gradient(150deg,#1B2F3A 0%,#0A1319 100%);
  --font-h:'Mochiy Pop One',sans-serif;--font-b:'Epilogue',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font-b);line-height:1.7;font-size:16px}
img,svg{max-width:100%;vertical-align:middle}
a{color:var(--neon);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:100%;max-width:1160px;margin:0 auto;padding:0 16px}
.container.narrow{max-width:840px}
.center{text-align:center}
.site-header{position:sticky;top:0;z-index:50;background:rgba(10,19,25,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,164,92,.35)}
.header-in{display:flex;align-items:center;gap:14px;min-height:60px}
.brand{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-h);font-weight:400;font-size:1.15rem;color:var(--text);white-space:nowrap}
.brand:hover{text-decoration:none}
.nav-desktop{display:none;margin-left:auto;gap:18px}
.nav-desktop a{color:var(--muted);font-weight:500;font-size:.95rem}
.nav-desktop a:hover{color:var(--neon);text-decoration:none}
.header-cta{display:flex;gap:8px;margin-left:auto}
.nav-desktop+.header-cta{margin-left:0}
.btn{display:inline-block;padding:10px 20px;border-radius:10px;font-family:var(--font-b);font-weight:700;font-size:.9rem;cursor:pointer;border:1px solid transparent;transition:transform .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,#FFA45C,#F07F2E);color:#101C24;box-shadow:var(--glow)}
.btn-secondary{background:transparent;color:var(--neon);border-color:rgba(255,164,92,.55)}
.btn-block{display:block;width:100%;text-align:center}
.pulse{animation:pulse-glow 2s infinite}
@keyframes pulse-glow{0%,100%{box-shadow:0 0 8px rgba(255,164,92,.4)}50%{box-shadow:0 0 22px rgba(255,164,92,.85)}}
.nav-toggle{display:none}
.burger{display:flex;flex-direction:column;gap:4px;cursor:pointer;padding:6px;margin-left:4px}
.burger span{width:22px;height:2px;background:var(--neon);border-radius:2px}
.m-nav{display:none;background:var(--panel);border-bottom:1px solid rgba(255,164,92,.3)}
.m-nav-group{padding:10px 16px}
.m-nav-group h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--neon);margin-bottom:6px;font-weight:700}
.m-nav-group a{display:block;padding:6px 0;color:var(--text)}
.nav-toggle:checked~.m-nav{display:block}
/* koi-ripple hero */
.koi-hero{position:relative;padding:74px 0 56px;overflow:hidden;background:radial-gradient(120% 140% at 70% 20%,#1B2F3A 0%,#101C24 55%,#0A1319 100%)}
.ripple-bg{position:absolute;inset:0;pointer-events:none}
.ring{position:absolute;border-radius:50%;border:2px solid rgba(255,164,92,.35);animation:ripple 6s ease-out infinite}
.r1{width:220px;height:220px;right:6%;top:50%;margin-top:-110px}
.r2{width:360px;height:360px;right:-3%;top:50%;margin-top:-180px;animation-delay:1.4s}
.r3{width:520px;height:520px;right:-11%;top:50%;margin-top:-260px;animation-delay:2.8s}
@keyframes ripple{0%{transform:scale(.6);opacity:0}25%{opacity:.9}100%{transform:scale(1.08);opacity:0}}
.koi-dot{position:absolute;width:16px;height:16px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#FFD9B0,#F07F2E);box-shadow:0 0 14px rgba(255,164,92,.7);animation:swim 8s ease-in-out infinite alternate}
.d1{right:16%;top:34%}
.d2{right:30%;top:56%;animation-delay:2s;width:11px;height:11px}
.d3{right:9%;top:63%;animation-delay:4s;width:9px;height:9px}
@keyframes swim{from{transform:translate(0,0) rotate(-8deg)}to{transform:translate(-46px,-22px) rotate(6deg)}}
.hero-in{position:relative;text-align:center}
.hero-in h1{font-family:var(--font-h);font-size:clamp(2.4rem,7vw,4rem);letter-spacing:.04em;color:var(--text);text-shadow:0 0 26px rgba(255,164,92,.45)}
.hero-sub{max-width:600px;margin:14px auto 22px;color:var(--muted)}
.hero-cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.section{padding:38px 0}
.section-alt{background:rgba(22,38,47,.55)}
.sec-title{font-family:var(--font-h);font-size:1.4rem;font-weight:400;margin-bottom:8px;text-align:center}
.sec-sub{max-width:640px;margin:0 auto 20px;color:var(--muted);font-size:.92rem;text-align:center}
.grid-3,.grid-4{display:grid;gap:16px;grid-template-columns:1fr;margin-bottom:8px}
.glow-card{display:block;background:var(--grad-panel);border:1px solid rgba(255,164,92,.35);border-radius:14px;padding:18px;color:var(--text);transition:border-color .15s,box-shadow .15s}
.glow-card:hover{border-color:var(--neon);box-shadow:var(--glow);text-decoration:none}
.glow-card h3{font-family:var(--font-b);font-size:1.05rem;margin-bottom:6px;color:var(--neon)}
.glow-card p{color:var(--muted);font-size:.92rem}
.nc-icon{font-size:1.5rem;display:block;margin-bottom:8px}
/* motif gallery cards（CSS 纹样卡） */
.motif-card{display:block;background:var(--grad-panel);border:1px solid rgba(255,164,92,.35);border-radius:14px;overflow:hidden;color:var(--text);transition:border-color .15s,box-shadow .15s}
.motif-card:hover{border-color:var(--neon);box-shadow:var(--glow);text-decoration:none}
.motif-art{height:110px;position:relative;overflow:hidden;border-bottom:1px solid rgba(255,164,92,.3)}
.motif-card h3{font-size:1.05rem;margin:12px 16px 4px;color:var(--neon)}
.motif-card p{color:var(--muted);font-size:.9rem;margin:0 16px 16px}
.m-koi{background:radial-gradient(circle at 78% 46%,rgba(255,164,92,.16),transparent 46%),linear-gradient(160deg,#132430,#0A1319)}
.m-koi .mr{position:absolute;border:2px solid rgba(255,164,92,.5);border-radius:50%;right:8%;top:50%;transform:translateY(-50%)}
.m-koi .mr:nth-child(1){width:44px;height:44px}
.m-koi .mr:nth-child(2){width:72px;height:72px;opacity:.6}
.m-koi .mr:nth-child(3){width:104px;height:104px;opacity:.3}
.m-koi .kf{position:absolute;width:14px;height:14px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#FFD9B0,#F07F2E);right:27%;top:42%;box-shadow:0 0 12px rgba(255,164,92,.8)}
.m-naga{background:radial-gradient(.9em .9em at 50% 0%,rgba(255,164,92,.55) 48%,transparent 52%),radial-gradient(.9em .9em at 0% 50%,rgba(255,164,92,.35) 48%,transparent 52%),radial-gradient(.9em .9em at 100% 50%,rgba(255,164,92,.35) 48%,transparent 52%);background-size:1.8em 1.8em,1.8em 1.8em,1.8em 1.8em;background-color:#132430;background-position:0 0,.9em .9em,.9em .9em}
.m-kipas{background:repeating-conic-gradient(from -60deg at 50% 118%,#0F1D26 0deg 9deg,rgba(255,164,92,.42) 9deg 18deg)}
.m-mahjong{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;padding:16px;align-content:center;background:linear-gradient(160deg,#132430,#0A1319)}
.m-mahjong i{aspect-ratio:3/4;border-radius:8px;background:linear-gradient(180deg,#F3EDE4,#D8CDBB);box-shadow:inset 0 -4px 0 rgba(0,0,0,.12);position:relative}
.m-mahjong i::after{content:"";position:absolute;inset:26%;border-radius:4px;background:#1E6E5A}
.m-palet{display:flex}
.m-palet i{flex:1}
.m-palet i:nth-child(1){background:#C0392B}
.m-palet i:nth-child(2){background:linear-gradient(180deg,#FFD27A,#C9962E)}
.m-palet i:nth-child(3){background:#2E8B74}
.m-simbol{background:radial-gradient(circle at 26% 46%,rgba(127,182,201,.35) 0 15%,transparent 16%),radial-gradient(circle at 62% 32%,rgba(255,164,92,.4) 0 9%,transparent 10%),radial-gradient(circle at 62% 32%,transparent 0 14%,rgba(255,164,92,.5) 15% 17%,transparent 18%),linear-gradient(160deg,#132430,#0A1319)}
/* prose */
.prose .note{color:var(--muted);font-size:.9rem}
.page-head{padding-top:22px}
.page-head h1,.prose h1{font-family:var(--font-h);font-weight:400;font-size:clamp(1.5rem,4.5vw,2.1rem)}
.prose h2{font-family:var(--font-b);font-weight:700;font-size:1.35rem;margin:26px 0 10px}
.prose h3{font-size:1.08rem;font-weight:700;margin:20px 0 8px;color:var(--neon)}
.prose p{margin:0 0 14px}
.prose ul,.prose ol{margin:0 0 14px 22px}
.prose li{margin-bottom:6px}
.steps li{margin-bottom:10px}
.steps li strong{color:var(--neon)}
.palette-strip{height:56px;border-radius:12px;margin:6px 0 18px;border:1px solid rgba(255,164,92,.3);position:relative;overflow:hidden}
.palette-strip::after{content:"ilustrasi visual";position:absolute;right:8px;bottom:6px;font-size:.62rem;letter-spacing:.08em;color:rgba(243,237,228,.75);text-transform:uppercase}
.ps-koi{background:radial-gradient(circle at 80% 50%,rgba(255,164,92,.5),transparent 40%),linear-gradient(120deg,#101C24,#16323F 60%,#0A1319)}
.ps-naga{background:repeating-linear-gradient(115deg,#132430 0 16px,rgba(255,164,92,.28) 16px 18px,#0F1D26 18px 34px)}
.ps-kipas{background:repeating-conic-gradient(from -55deg at 30% 130%,#0F1D26 0deg 7deg,rgba(255,164,92,.4) 7deg 14deg)}
.ps-mahjong{background:repeating-linear-gradient(90deg,#F3EDE4 0 34px,#1E6E5A 34px 38px,#F3EDE4 38px 72px,#B23A2F 72px 76px)}
.ps-palet{background:linear-gradient(90deg,#C0392B 0 33%,#D9A441 33% 66%,#2E8B74 66%)}
.ps-simbol{background:radial-gradient(circle at 20% 50%,rgba(127,182,201,.4) 0 8%,transparent 9%),radial-gradient(circle at 50% 50%,rgba(255,164,92,.5) 0 5%,transparent 6%),radial-gradient(circle at 75% 50%,rgba(243,237,228,.35) 0 10%,transparent 11%),#101C24}
.quick-form{display:grid;gap:8px;max-width:360px;margin:12px 0}
.quick-form label{font-size:.85rem;color:var(--muted)}
.quick-form input{background:#0A1319;border:1px solid rgba(255,164,92,.4);border-radius:8px;padding:10px 12px;color:var(--text);font-family:var(--font-b)}
.quick-form input:focus{outline:none;border-color:var(--neon)}
.kamus-grid{display:grid;gap:10px;margin:14px 0}
.kamus-item{background:var(--grad-panel);border:1px solid rgba(255,164,92,.3);border-radius:10px;overflow:hidden}
.kamus-item summary{cursor:pointer;padding:13px 16px;font-weight:700;list-style:none;position:relative}
.kamus-item summary::-webkit-details-marker{display:none}
.kamus-item summary::after{content:"+";position:absolute;right:16px;color:var(--neon)}
.kamus-item[open] summary::after{content:"−"}
.kamus-item p{padding:0 16px 14px;color:var(--muted);font-size:.95rem}
.err-wrap{padding:70px 16px}
.err-code{font-family:var(--font-h);font-size:5rem;color:var(--neon);text-shadow:var(--glow)}
.ripple-bg.small{position:relative;height:120px;margin-bottom:6px}
.ripple-bg.small .ring{left:50%;top:50%;margin:-60px 0 0 -60px;right:auto}
.ripple-bg.small .r1{width:120px;height:120px}
.ripple-bg.small .r2{width:170px;height:170px;margin:-85px 0 0 -85px}
.err-wrap .btn{margin:18px 0}
.crumbs{padding:12px 0 0;font-size:.82rem;color:var(--muted)}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px;color:var(--neon)}
.site-footer{background:var(--panel);border-top:1px solid rgba(255,164,92,.35);padding:36px 0 118px;margin-top:30px}
.foot-grid{display:grid;gap:24px;grid-template-columns:1fr}
.foot-brand p{color:var(--muted);font-size:.9rem;margin:10px 0}
.foot-col h3{font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:var(--neon);margin-bottom:8px;font-weight:700}
.foot-col a{display:block;color:var(--muted);padding:3px 0;font-size:.92rem}
.foot-col a:hover{color:var(--neon);text-decoration:none}
.pill-18{display:inline-block;border:1px solid var(--neon);color:var(--neon);border-radius:999px;padding:2px 12px;font-weight:700;font-size:.85rem}
.foot-bottom{margin-top:24px;padding-top:16px;border-top:1px solid rgba(255,164,92,.25);color:var(--muted);font-size:.85rem}
.float-cta{position:fixed;left:50%;bottom:calc(12px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:60;display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;text-align:center;width:max-content;max-width:calc(100vw - 24px);padding:10px 18px;background:rgba(10,19,25,.92);backdrop-filter:blur(8px);border:1px solid rgba(255,164,92,.45);border-radius:14px;box-shadow:0 -6px 24px rgba(0,0,0,.35),0 0 18px rgba(255,164,92,.18)}
.float-jackpot{font-family:var(--font-h);font-weight:700;color:var(--neon);font-size:1.05rem;letter-spacing:.02em;white-space:nowrap;text-shadow:0 0 12px rgba(255,164,92,.55)}
.float-cta .btn{animation:cta-blink 1.6s ease-in-out infinite;white-space:nowrap}
@keyframes cta-blink{0%,100%{box-shadow:0 0 8px rgba(255,164,92,.45);transform:scale(1)}50%{box-shadow:0 0 22px rgba(255,164,92,.9),0 0 38px rgba(255,164,92,.4);transform:scale(1.04)}}
@media (min-width:768px){
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:2fr 1fr 1.4fr 1fr}
  .nav-desktop{display:flex}
  .header-cta{margin-left:0}
  .burger{display:none}
  .m-nav{display:none!important}
}
@media (min-width:1024px){.grid-4{grid-template-columns:repeat(4,1fr)}}
@media (prefers-reduced-motion:reduce){.pulse,.ring,.koi-dot,.float-cta .btn{animation:none}}