:root{
  --cream:#F2FBFF; --cream-2:#DDF1FA; --ink:#15283D; --ink-2:#4A6177;
  --sea:#1F8FC9; --sea-2:#5BC0EB; --aqua:#C9EEF8; --teal:#1FA59A; --teal-2:#7FDCCF;
  --orange:#FF8A3D; --orange-2:#FFD3A8; --sun:#FFC83D; --coral:#FF6F7D;
  --navy:#0B1E3A; --purple:#6C5CE7; --pink:#F06C9B; --sand:#F5DFAE;
  --r:28px; --shadow:0 6px 0 rgba(21,40,61,.9);
  --font-d:"ZCOOL KuaiLe","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-b:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{overflow-x:clip;scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--font-b);color:var(--ink);background:var(--cream);font-size:18px;line-height:1.7;-webkit-tap-highlight-color:transparent}
img{max-width:100%;display:block}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
a{color:inherit}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
:focus-visible{outline:4px solid var(--orange);outline-offset:3px;border-radius:12px}

/* top bar */
.topbar{position:fixed;inset:12px 12px auto;z-index:50;display:flex;align-items:center;gap:12px;padding:8px 10px 8px 16px;background:rgba(242,251,255,.92);backdrop-filter:blur(10px);border:3px solid var(--ink);border-radius:999px;box-shadow:0 4px 0 var(--ink)}
.brand{display:flex;align-items:center;gap:8px;text-decoration:none;font-family:var(--font-d);font-size:22px;white-space:nowrap}
.nav{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{font-family:var(--font-d);font-size:18px;text-decoration:none;padding:6px 14px;border-radius:999px;white-space:nowrap;transition:background .2s}
.nav a:hover,.nav a.active{background:var(--sun)}
.sound-toggle{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;background:var(--sea);color:#fff;border:3px solid var(--ink);flex:none}
.sound-toggle[aria-pressed="false"]{background:#aab}
.sound-toggle[aria-pressed="false"] .wave{opacity:0}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-d);font-size:20px;padding:10px 22px;background:#fff;border:3px solid var(--ink);border-radius:999px;box-shadow:0 5px 0 var(--ink);text-decoration:none;transition:transform .12s,box-shadow .12s}
.btn:hover{transform:translateY(-2px);box-shadow:0 7px 0 var(--ink)}
.btn:active{transform:translateY(4px);box-shadow:0 1px 0 var(--ink)}
.btn-big{font-size:26px;padding:14px 32px;background:var(--orange);color:#fff;text-shadow:0 2px 0 rgba(0,0,0,.25)}
.btn-ghost{background:rgba(255,255,255,.88)}
.speak.talking{background:var(--teal-2)}

/* hero */
.hero{position:relative;min-height:100svh;overflow:hidden;display:grid;place-items:center;perspective:1200px;background:#2a9fd6}
.hero-scene{position:absolute;inset:0;z-index:0}
.layer{position:absolute;will-change:transform;transition:transform .25s ease-out}
.l-bg{inset:-6%}
.l-bg img{width:100%;height:100%;object-fit:cover}
.l-bg::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 50% 42%,rgba(200,240,255,.55),rgba(200,240,255,0) 55%),linear-gradient(transparent 78%,var(--cream))}
.l-whale{top:12%;left:0;width:min(40vw,520px)}
.l-whale img{cursor:pointer;filter:drop-shadow(0 16px 16px rgba(0,30,60,.25))}
.l-jelly{right:6%;top:14%;width:min(11vw,140px)}
.l-turtle{left:3%;bottom:10%;width:min(22vw,280px)}
.l-clown{left:30%;bottom:9%;width:min(12vw,150px)}
.l-dolphin{right:8%;bottom:4%;width:min(20vw,250px)}
.l-dolphin img{cursor:pointer;filter:drop-shadow(0 14px 14px rgba(0,30,60,.25))}
.l-turtle img,.l-clown img,.l-jelly img{filter:drop-shadow(0 12px 12px rgba(0,30,60,.2))}
.swim-l{animation:swimL 36s linear -13s infinite}
@keyframes swimL{0%{transform:translate(110vw,0)}50%{transform:translate(40vw,3vh) rotate(-2deg)}100%{transform:translate(-50vw,0)}}
.swim-r{animation:swimR 14s ease-in-out infinite}
@keyframes swimR{0%,100%{transform:translate(0,0)}25%{transform:translate(8vw,-3vh) rotate(-4deg)}50%{transform:translate(16vw,0)}75%{transform:translate(8vw,2vh) rotate(4deg)}}
.drift{animation:drift 6s ease-in-out infinite}
@keyframes drift{0%,100%{transform:translateY(0) scaleY(1)}40%{transform:translateY(-24px) scaleY(.94)}70%{transform:translateY(-10px) scaleY(1.04)}}
.bob{animation:bob 3.2s ease-in-out infinite}
.bob.d2{animation-delay:-1.4s;animation-duration:2.8s}
@keyframes bob{0%,100%{transform:translateY(0) rotate(0)}50%{transform:translateY(-12px) rotate(-1.5deg)}}
.jump{animation:jump .9s cubic-bezier(.3,.6,.4,1)!important}
@keyframes jump{0%{transform:none}45%{transform:translateY(-38%) rotate(-18deg)}100%{transform:none}}
.sing{animation:sing 1.2s ease-in-out!important}
@keyframes sing{0%,100%{scale:1}30%{scale:1.08}60%{scale:.97}}
.bubbles{position:absolute;inset:0;pointer-events:none}
.bubbles i{position:absolute;bottom:-40px;width:18px;height:18px;border-radius:50%;border:2.5px solid rgba(255,255,255,.85);background:radial-gradient(circle at 30% 30%,rgba(255,255,255,.9) 0 18%,rgba(255,255,255,.15) 30%);animation:rise 9s linear infinite}
.bubbles i:nth-child(1){left:6%;animation-delay:0s}.bubbles i:nth-child(2){left:16%;width:10px;height:10px;animation-delay:-3s;animation-duration:7s}
.bubbles i:nth-child(3){left:27%;width:26px;height:26px;animation-delay:-5s}.bubbles i:nth-child(4){left:41%;animation-delay:-1s;animation-duration:11s}
.bubbles i:nth-child(5){left:55%;width:12px;height:12px;animation-delay:-6s}.bubbles i:nth-child(6){left:63%;width:22px;height:22px;animation-delay:-2s;animation-duration:10s}
.bubbles i:nth-child(7){left:74%;animation-delay:-7s}.bubbles i:nth-child(8){left:83%;width:10px;height:10px;animation-delay:-4s;animation-duration:8s}
.bubbles i:nth-child(9){left:91%;width:24px;height:24px;animation-delay:-8s}.bubbles i:nth-child(10){left:48%;width:14px;height:14px;animation-delay:-9s;animation-duration:12s}
@keyframes rise{0%{transform:translate(0,0);opacity:0}10%{opacity:1}50%{transform:translate(14px,-55vh)}100%{transform:translate(-6px,-110vh);opacity:.2}}

.hero-copy{position:relative;z-index:5;text-align:center;padding:120px 20px 30vh;max-width:820px}
.hero-kicker{display:inline-block;font-family:var(--font-d);font-size:24px;color:var(--sea);background:rgba(242,251,255,.92);border:3px solid var(--ink);border-radius:999px;padding:2px 18px;margin-bottom:14px}
.title-3d{font-family:var(--font-d);font-weight:400;font-size:clamp(60px,13vw,150px);line-height:1;color:var(--sun);letter-spacing:.04em;-webkit-text-stroke:4px var(--ink);paint-order:stroke fill;
  text-shadow:0 2px 0 #E89A1C,0 4px 0 #E89A1C,0 6px 0 #D9850F,0 8px 0 #C9760A,0 10px 0 var(--ink),0 18px 24px rgba(0,0,0,.25);
  animation:titleIn 1s cubic-bezier(.2,1.6,.4,1) both;transform-origin:50% 80%}
@keyframes titleIn{from{transform:scale(.4) rotateX(60deg);opacity:0}to{transform:none;opacity:1}}
.hero-sub{display:inline-block;font-size:21px;margin:18px auto 24px;max-width:30em;font-weight:700;background:rgba(242,251,255,.86);border-radius:20px;padding:8px 18px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hint{display:inline-block;margin-top:16px;font-size:16px;font-weight:700;color:var(--ink);background:rgba(242,251,255,.92);border-radius:999px;padding:4px 16px}

/* sections */
.sec{position:relative;padding:clamp(64px,9vw,120px) clamp(16px,4vw,48px)}
.sec-head{text-align:center;max-width:760px;margin:0 auto 40px}
.sec-head h2{font-family:var(--font-d);font-weight:400;font-size:clamp(40px,6vw,64px);line-height:1.15;margin:12px 0 10px}
.sec-head p{font-size:19px;color:var(--ink-2)}
.chip{display:inline-block;font-family:var(--font-d);font-size:18px;padding:4px 16px;border-radius:999px;background:var(--teal);color:#fff;border:3px solid var(--ink)}
.chip-orange{background:var(--orange)}.chip-blue{background:var(--sea)}.chip-purple{background:var(--purple)}.chip-pink{background:var(--pink)}

/* dive */
.sec-dive{background:linear-gradient(var(--cream),#9EDDF3 8%,#4FB4E3 22%,#1E6FA8 40%,#123E6E 55%,#0A1F3F 72%,#050C1C 90%,#02050c)}
.sec-dive-head{padding-bottom:20px}
.dive{position:relative;max-width:1150px;margin:0 auto;display:grid;grid-template-columns:260px 1fr;gap:40px;padding:0 clamp(16px,4vw,48px)}
.dive-rail{position:relative}
.sub-wrap{position:sticky;top:calc(50vh - 110px);display:flex;flex-direction:column;align-items:center;gap:10px}
.sub-img{width:220px;position:relative;z-index:2;animation:bob 3s ease-in-out infinite;filter:drop-shadow(0 12px 12px rgba(0,0,0,.3))}
.sub-light{position:absolute;z-index:1;left:62%;top:40px;width:340px;height:200px;transform-origin:0 50%;transform:rotate(10deg);background:radial-gradient(ellipse at 0 50%,rgba(255,240,170,.75),rgba(255,240,170,.2) 45%,transparent 70%);clip-path:polygon(0 42%,100% 0,100% 100%,0 58%);opacity:0;transition:opacity .4s;pointer-events:none}
.gauge{display:flex;align-items:baseline;gap:6px;background:#fff;border:4px solid var(--ink);border-radius:999px;padding:4px 18px;box-shadow:0 5px 0 var(--ink)}
.gauge b{font-family:var(--font-d);font-weight:400;font-size:34px;color:var(--sea);min-width:3.2ch;text-align:right;font-variant-numeric:tabular-nums}
.gauge small{font-weight:800;font-size:14px;color:var(--ink-2)}
.zones{display:grid;gap:min(30vh,240px);padding:20px 0 30vh}
.zone{min-height:62vh;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:12px;border:4px solid var(--ink);border-radius:var(--r);padding:28px;box-shadow:0 10px 0 var(--ink)}
.zone h3{font-family:var(--font-d);font-weight:400;font-size:clamp(38px,5vw,56px);line-height:1.1}
.zone p{font-size:19px;max-width:34em}
.z-depth{font-family:var(--font-d);font-size:20px;padding:2px 16px;border-radius:999px;border:3px solid currentColor}
.z-fun{font-size:16px!important;font-weight:700;padding:8px 14px;border-radius:16px;background:rgba(255,255,255,.12)}
.z-animals{display:flex;flex-wrap:wrap;gap:12px;margin:6px 0}
.z-animals figure{width:120px;text-align:center}
.z-animals img{width:110px;height:110px;object-fit:contain;margin:0 auto;animation:bob 3.4s ease-in-out infinite;filter:drop-shadow(0 8px 8px rgba(0,0,0,.25))}
.z-animals figure:nth-child(2) img{animation-delay:-1s}.z-animals figure:nth-child(3) img{animation-delay:-2s}.z-animals figure:nth-child(4) img{animation-delay:-.5s}
.z-animals figcaption{font-family:var(--font-d);font-size:19px}
.z1{background:rgba(255,255,255,.88)}
.z2{background:rgba(26,92,150,.82);color:#fff;border-color:#BFE4F5;box-shadow:0 10px 0 rgba(191,228,245,.6)}
.z3{background:rgba(10,28,60,.86);color:#E9F4FF;border-color:#7FA6C8;box-shadow:0 10px 0 rgba(127,166,200,.45)}
.z4{background:rgba(3,8,20,.9);color:#DCE8F5;border-color:#56708C;box-shadow:0 10px 0 rgba(86,112,140,.4)}
.z2 .btn-ghost,.z3 .btn-ghost,.z4 .btn-ghost{background:rgba(255,255,255,.14);color:#fff;border-color:#fff;box-shadow:0 5px 0 rgba(255,255,255,.45)}
.z3 .z-animals img,.z4 .z-animals img{filter:drop-shadow(0 0 18px rgba(130,220,255,.45))}
.z3 .z-animals img[src*="angler"]{filter:drop-shadow(0 0 22px rgba(255,230,120,.6))}
.trench-bottom{position:relative;max-width:1150px;margin:0 auto;padding:0 clamp(16px,4vw,48px) 90px}
.trench-bottom img{width:100%;aspect-ratio:16/7;object-fit:cover;border:4px solid #56708C;border-radius:var(--r)}
.trench-bottom p{position:absolute;left:50%;bottom:120px;transform:translateX(-50%);width:min(84%,560px);text-align:center;color:#fff;font-family:var(--font-d);font-size:clamp(18px,2.2vw,24px);background:rgba(3,8,20,.72);border:3px solid #7FA6C8;border-radius:20px;padding:10px 18px}

/* cards */
.sec-animals{background:linear-gradient(#02050c 0,#0B2B4F 60px,#1E6FA8 18%,var(--aqua) 42%,var(--aqua))}
.sec-animals .sec-head h2{color:#fff;text-shadow:0 4px 0 var(--ink)}
.sec-animals .sec-head p{color:#E3F5FF}
.filters{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-bottom:34px}
.filter{font-family:var(--font-d);font-size:19px;padding:8px 20px;border-radius:999px;border:3px solid var(--ink);background:#fff}
.filter.on{background:var(--ink);color:#fff}
.cards{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:28px}
.card{perspective:1100px;height:440px;transition:opacity .3s,transform .3s}
.card.hide{display:none}
.card-in{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .7s cubic-bezier(.3,1.4,.5,1)}
.card.flip .card-in{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border:4px solid var(--ink);border-radius:var(--r);box-shadow:0 8px 0 var(--ink);overflow:hidden;cursor:pointer}
.front{display:flex;flex-direction:column;background:var(--c,#C9EEF8)}
.front .pic{flex:1;min-height:0;display:grid;place-items:center;padding:18px;background:radial-gradient(circle at 50% 60%,rgba(255,255,255,.75),rgba(255,255,255,0) 65%)}
.front .pic img{max-height:260px;object-fit:contain;transition:transform .3s;filter:drop-shadow(0 12px 10px rgba(0,0,0,.22))}
.card:hover .front .pic img{transform:scale(1.07) rotate(-2deg)}
.front .nm{background:#fff;border-top:4px solid var(--ink);padding:12px 16px;display:flex;align-items:center;justify-content:space-between;gap:8px}
.front .nm b{font-family:var(--font-d);font-weight:400;font-size:30px;line-height:1.1}
.front .nm small{display:block;font-size:13px;color:var(--ink-2);font-weight:600}
.tag{font-size:14px;font-weight:700;padding:3px 10px;border-radius:999px;border:2px solid var(--ink);white-space:nowrap}
.tag.fish{background:#BDE3F7}.tag.notfish{background:#FFD3A8}
.back{transform:rotateY(180deg);background:#fff;padding:18px 18px 16px;display:flex;flex-direction:column;gap:8px}
.back h3{font-family:var(--font-d);font-weight:400;font-size:28px;line-height:1.2}
.facts{display:grid;gap:7px;font-size:15.5px;line-height:1.5}
.facts div{display:grid;grid-template-columns:68px 1fr;gap:8px}
.facts dt{font-weight:800;color:var(--sea)}
.back-actions{display:flex;gap:8px;margin-top:auto}
.mini{font-size:15px;font-weight:800;padding:6px 12px;border-radius:999px;border:3px solid var(--ink);background:var(--sun);display:inline-flex;align-items:center;gap:6px}
.mini.listen{background:var(--teal-2)}

/* reef */
.sec-reef{background:linear-gradient(var(--aqua),#FFE6E0)}
.world{position:relative;max-width:1150px;margin:0 auto;border:4px solid var(--ink);border-radius:var(--r);overflow:hidden;box-shadow:0 10px 0 var(--ink);transform-style:preserve-3d;transition:transform .3s ease-out;background:#fff}
.world-pic{position:relative}
.world img{width:100%;aspect-ratio:16/9;object-fit:cover}
.spot{position:absolute;transform:translate(-50%,-50%);width:58px;height:58px;border-radius:50%;background:var(--sun);border:4px solid var(--ink);font-family:var(--font-d);font-size:28px;display:grid;place-items:center;box-shadow:0 5px 0 var(--ink)}
.spot::after{content:"";position:absolute;inset:-12px;border-radius:50%;border:4px solid #fff;animation:ping 1.8s ease-out infinite}
.spot.seen{background:var(--teal);color:#fff}
.spot.seen::after{animation:none;opacity:0}
.spot.cur{background:var(--orange);color:#fff;transform:translate(-50%,-50%) scale(1.15)}
@keyframes ping{from{transform:scale(.6);opacity:1}to{transform:scale(1.4);opacity:0}}
.world-info{position:absolute;left:2.5%;top:4%;width:min(38%,440px);background:#fff;border:4px solid var(--ink);border-radius:var(--r);padding:16px 20px;box-shadow:0 6px 0 var(--ink)}
.world-info p{font-size:16px;line-height:1.6}
.world-info h3{font-family:var(--font-d);font-weight:400;font-size:28px;line-height:1.2;margin-bottom:6px}
.world-info.pop{animation:pop .45s cubic-bezier(.2,1.6,.4,1)}
@keyframes pop{from{transform:scale(.92) rotateX(20deg)}to{transform:none}}

/* protect */
.sec-protect{background:linear-gradient(#FFE6E0,var(--cream) 40%,var(--aqua))}
.protect{max-width:1150px;margin:0 auto;display:grid;grid-template-columns:1fr 1.1fr;gap:36px;align-items:center}
.protect-pic img{width:100%;aspect-ratio:4/3;object-fit:cover;border:4px solid var(--ink);border-radius:var(--r);box-shadow:0 10px 0 var(--ink);transform:rotate(-2deg)}
.harm{display:grid;gap:16px;justify-items:start}
.harm-item{display:grid;grid-template-columns:56px 1fr;gap:14px;background:#fff;border:4px solid var(--ink);border-radius:22px;padding:14px 18px;box-shadow:0 6px 0 var(--ink)}
.harm-item h3{font-family:var(--font-d);font-weight:400;font-size:26px;line-height:1.2}
.harm-item p{font-size:16.5px;line-height:1.6}
.hi{width:56px;height:56px;border-radius:50%;border:3px solid var(--ink);background:var(--coral) center/60% no-repeat}
.hi-1{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40'%3E%3Cpath d='M8 14c0-6 24-6 24 0v6c0 3-24 3-24 0z' fill='%23fff'/%3E%3Cpath d='M11 22v10M17 23v12M23 23v10M29 22v12' stroke='%23fff' stroke-width='3' stroke-linecap='round'/%3E%3C/svg%3E")}
.hi-2{background-color:var(--sun);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40'%3E%3Cpath d='M4 8l32 24M4 20l20 16M16 4l20 16M4 32L32 4M14 36L36 14M4 14L14 4' stroke='%2315283D' stroke-width='2.5'/%3E%3C/svg%3E")}
.hi-3{background-color:var(--sea-2);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40'%3E%3Crect x='14' y='4' width='12' height='6' rx='2' fill='%23fff'/%3E%3Cpath d='M13 12h14l2 6v16a3 3 0 0 1-3 3H14a3 3 0 0 1-3-3V18z' fill='%23fff'/%3E%3C/svg%3E")}
.pledge{max-width:1150px;margin:56px auto 0;background:var(--navy);color:#fff;border:4px solid var(--ink);border-radius:var(--r);padding:28px;box-shadow:0 10px 0 var(--ink)}
.pledge-head h3{font-family:var(--font-d);font-weight:400;font-size:36px}
.pledge-head p{color:#CFE6F7;margin-bottom:18px}
.pledge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.pl{display:flex;align-items:center;gap:12px;text-align:left;padding:14px 16px;border-radius:20px;border:3px solid #7FA6C8;background:rgba(255,255,255,.06);transition:background .25s,transform .15s,border-color .25s;color:#fff}
.pl b{font-family:var(--font-d);font-weight:400;font-size:21px;line-height:1.25}
.pl:hover{transform:translateY(-3px)}
.pl[aria-pressed="true"]{background:var(--sun);border-color:var(--sun);color:var(--ink)}
.pl-ic{flex:none;width:48px;height:48px;border-radius:14px;background:#fff center/70% no-repeat;border:3px solid var(--ink)}
.pl-cup{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40'%3E%3Cpath d='M11 8h18l-2 26H13z' fill='%235BC0EB' stroke='%2315283D' stroke-width='2.5' stroke-linejoin='round'/%3E%3Crect x='9' y='5' width='22' height='5' rx='2' fill='%23FF8A3D' stroke='%2315283D' stroke-width='2.5'/%3E%3C/svg%3E")}
.pl-bag{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40'%3E%3Cpath d='M14 14a6 6 0 0 1 12 0' fill='none' stroke='%2315283D' stroke-width='2.5'/%3E%3Crect x='8' y='14' width='24' height='21' rx='3' fill='%23F5DFAE' stroke='%2315283D' stroke-width='2.5'/%3E%3Cpath d='M15 25c3-3 7-3 10 0-3 3-7 3-10 0z' fill='%231FA59A'/%3E%3C/svg%3E")}
.pl-straw{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40'%3E%3Cpath d='M22 4l-4 16' stroke='%23FF6F7D' stroke-width='3.5' stroke-linecap='round'/%3E%3Cpath d='M10 16h20l-3 19H13z' fill='%23FFD3A8' stroke='%2315283D' stroke-width='2.5' stroke-linejoin='round'/%3E%3Cpath d='M6 6l28 28' stroke='%23E23B4E' stroke-width='3.5' stroke-linecap='round'/%3E%3C/svg%3E")}
.pl-beach{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40'%3E%3Cpath d='M2 28c6-4 10 4 18 0s12 4 18 0v10H2z' fill='%23F5DFAE' stroke='%2315283D' stroke-width='2'/%3E%3Ccircle cx='28' cy='11' r='6' fill='%23FFC83D' stroke='%2315283D' stroke-width='2'/%3E%3Cpath d='M10 26V12l8 6' fill='none' stroke='%2315283D' stroke-width='2.5' stroke-linejoin='round'/%3E%3C/svg%3E")}
.pl-bin{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40'%3E%3Crect x='8' y='9' width='24' height='4' rx='2' fill='%2315283D'/%3E%3Cpath d='M10 14h20l-2 21H12z' fill='%231FA59A' stroke='%2315283D' stroke-width='2.5' stroke-linejoin='round'/%3E%3Cpath d='M16 19v11M24 19v11' stroke='%23fff' stroke-width='2.5' stroke-linecap='round'/%3E%3C/svg%3E")}
.pl-talk{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 40 40'%3E%3Cpath d='M6 8h28v18H18l-8 7v-7H6z' fill='%23F06C9B' stroke='%2315283D' stroke-width='2.5' stroke-linejoin='round'/%3E%3Ccircle cx='14' cy='17' r='2' fill='%23fff'/%3E%3Ccircle cx='20' cy='17' r='2' fill='%23fff'/%3E%3Ccircle cx='26' cy='17' r='2' fill='%23fff'/%3E%3C/svg%3E")}
.badge{display:flex;align-items:center;gap:16px;margin-top:22px;padding:12px 18px;border-radius:22px;background:rgba(255,255,255,.06);border:3px dashed #7FA6C8}
.badge svg{filter:grayscale(1) opacity(.45);transition:filter .6s,transform .6s cubic-bezier(.2,1.6,.4,1)}
.badge b{display:block;font-family:var(--font-d);font-weight:400;font-size:28px}
.badge span{color:#CFE6F7}
.badge.on{border-style:solid;border-color:var(--sun)}
.badge.on svg{filter:none;transform:rotate(-10deg) scale(1.12)}

/* games */
.sec-games{background:linear-gradient(var(--aqua),#E7E2FF)}
.game-tabs{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.gtab{display:flex;align-items:center;gap:8px;font-family:var(--font-d);font-size:22px;padding:10px 20px;border:3px solid var(--ink);border-radius:20px;background:#fff;box-shadow:0 5px 0 var(--ink);transition:transform .15s}
.gtab.on{background:var(--purple);color:#fff;transform:translateY(3px);box-shadow:0 2px 0 var(--ink)}
.gicon{width:30px;height:30px;border-radius:50%;border:3px solid var(--ink);background:var(--sun)}
.gi-trash{background:var(--teal-2)}.gi-mem{background:var(--sea-2)}.gi-torch{background:var(--navy);box-shadow:inset 0 0 0 5px var(--sun)}
.game{display:none;max-width:900px;margin:0 auto;background:#fff;border:4px solid var(--ink);border-radius:var(--r);box-shadow:0 10px 0 var(--ink);padding:24px}
.game.on{display:block;animation:pop .4s cubic-bezier(.2,1.5,.4,1)}
.g-tip{font-size:19px;font-weight:700;text-align:center;margin-bottom:16px}
.g-row{display:flex;justify-content:center;align-items:center;gap:16px;flex-wrap:wrap;margin-top:18px}
.score{font-family:var(--font-d);font-size:22px}
.score b{color:var(--orange);font-size:28px;font-weight:800;font-family:var(--font-b)}
.bubble{position:absolute;top:-6px;right:-40px;font-family:var(--font-d);font-size:21px;background:#fff;border:3px solid var(--ink);border-radius:20px;padding:6px 14px;white-space:nowrap;z-index:2}

/* home game */
.home-stage{display:grid;grid-template-columns:1fr 1.1fr;gap:20px;align-items:center}
.home-animal{position:relative;text-align:center;padding-top:44px}
.home-animal .bubble{right:auto;left:50%;top:0;transform:translateX(-50%)}
#homeImg{height:220px;width:auto;max-width:100%;object-fit:contain;margin:0 auto;filter:drop-shadow(0 12px 10px rgba(0,0,0,.2))}
#homeImg.happy{animation:jump .8s}
#homeImg.no{animation:no .5s}
@keyframes no{0%,100%{transform:translateX(0)}20%,60%{transform:translateX(-14px)}40%,80%{transform:translateX(14px)}}
#homeImg.go{transition:transform .7s cubic-bezier(.5,0,.8,.5),opacity .7s;transform:translateY(160px) scale(.4);opacity:0}
.home-name{font-family:var(--font-d);font-size:32px}
.home-zones{display:grid;gap:0;background:var(--ink);border-radius:22px;overflow:hidden;border:4px solid var(--ink)}
.hz+.hz{border-top:3px solid var(--ink)}
.hz{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:16px 18px;text-align:left;transition:filter .2s,transform .15s}
.hz b{font-family:var(--font-d);font-weight:400;font-size:24px}
.hz small{font-weight:700;font-size:14px;opacity:.85}
.hz:hover{filter:brightness(1.12)}
.hz1{background:#8FD8F5;color:var(--ink)}.hz2{background:#2F7FBF;color:#fff}.hz3{background:#123566;color:#fff}.hz4{background:#050C1C;color:#fff}
.hz.right{animation:flashOk .8s}
.hz.wrong{animation:no .5s}
@keyframes flashOk{0%,100%{box-shadow:none}30%{box-shadow:inset 0 0 0 6px var(--sun)}}

/* trash game */
.trash-sea{position:relative;height:420px;border-radius:22px;border:4px solid var(--ink);overflow:hidden;background:linear-gradient(#8FD8F5,#3FA6DB 60%,#2A86C2);touch-action:manipulation}
.trash-sea::after{content:"";position:absolute;inset:auto 0 0;height:46px;background:radial-gradient(ellipse at 30% 100%,#F5DFAE 0 60%,transparent 61%),radial-gradient(ellipse at 80% 100%,#EFD39A 0 55%,transparent 56%);pointer-events:none}
.ti{position:absolute;width:76px;height:76px;padding:4px;display:grid;place-items:center;transition:transform .2s;animation:float 4s ease-in-out infinite}
.ti img,.ti svg{width:100%;height:100%;object-fit:contain;pointer-events:none}
.ti.animal img{filter:drop-shadow(0 6px 6px rgba(0,0,0,.2))}
.ti.got{animation:got .6s forwards}
@keyframes got{to{transform:translateY(-120px) scale(.2);opacity:0}}
.ti.ouch{animation:no .5s}
@keyframes float{0%,100%{translate:0 0}50%{translate:10px -12px}}
.trash-done{position:absolute;inset:0;display:grid;place-items:center;text-align:center;font-family:var(--font-d);font-size:30px;background:rgba(242,251,255,.82);animation:pop .5s}

/* memory */
.mem-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:540px;margin:0 auto}
.mcard{aspect-ratio:3/4;perspective:700px}
.mcard .in{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.3,1.4,.5,1)}
.mcard.open .in,.mcard.done .in{transform:rotateY(180deg)}
.mcard .f,.mcard .b{position:absolute;inset:0;border:4px solid var(--ink);border-radius:18px;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:grid;place-items:center}
.mcard .f{background:repeating-linear-gradient(45deg,var(--sea) 0 14px,var(--sea-2) 14px 28px)}
.mcard .f::after{content:"?";font-family:var(--font-d);font-size:44px;color:#fff;-webkit-text-stroke:2px var(--ink)}
.mcard .b{transform:rotateY(180deg);background:var(--cream);padding:6px}
.mcard .b{overflow:hidden}
.mcard .b img{width:100%;height:100%;object-fit:contain;min-height:0}
.mcard.done .b{background:#FFF0A8;animation:pop .5s}

/* torch game */
.torch-sea{--x:50%;--y:50%;position:relative;height:440px;border-radius:22px;border:4px solid var(--ink);overflow:hidden;background:url("img/deep.webp") center/cover,#06122a;touch-action:none;cursor:none}
.torch-dark{position:absolute;inset:0;z-index:3;pointer-events:none;background:radial-gradient(circle 95px at var(--x) var(--y),rgba(2,6,16,0) 0,rgba(2,6,16,.35) 60%,rgba(2,6,16,.97) 100%)}
.torch-sea::after{content:"";position:absolute;z-index:4;left:var(--x);top:var(--y);width:24px;height:24px;margin:-12px 0 0 -12px;border-radius:50%;border:3px solid rgba(255,240,170,.9);pointer-events:none}
.glow{position:absolute;z-index:2;width:96px;height:96px;padding:6px;transition:transform .3s}
.glow img{width:100%;height:100%;object-fit:contain;pointer-events:none;filter:drop-shadow(0 0 14px rgba(140,230,255,.8))}
.glow.found{z-index:5;animation:foundA .7s forwards}
.glow.found img{filter:drop-shadow(0 0 22px rgba(255,230,120,1))}
@keyframes foundA{50%{transform:scale(1.35)}100%{transform:scale(1.1)}}
.glow .lbl{position:absolute;left:50%;bottom:-8px;transform:translateX(-50%);font-family:var(--font-d);font-size:17px;background:var(--sun);border:2px solid var(--ink);border-radius:999px;padding:0 10px;white-space:nowrap;display:none}
.glow.found .lbl{display:block}
.torch-msg{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:6;padding:12px 24px;text-align:center;font-family:var(--font-d);font-size:26px;background:rgba(255,255,255,.95);border:4px solid var(--ink);border-radius:22px;box-shadow:0 6px 0 var(--ink);width:max-content;max-width:90%;animation:pop .5s}

.confetti{position:fixed;width:12px;height:16px;top:0;z-index:99;pointer-events:none;border-radius:3px}

.foot{background:var(--navy);color:#fff;text-align:center;padding:64px 20px 40px;position:relative}
.foot-mascot{width:130px;margin:-120px auto 8px;filter:drop-shadow(0 8px 8px rgba(0,0,0,.25));animation:bob 3s ease-in-out infinite}
.foot p{font-family:var(--font-d);font-size:22px}
.foot .small{font-family:var(--font-b);font-size:15px;opacity:.88;max-width:560px;margin:8px auto 0}

.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,200px);visibility:hidden;z-index:80;background:var(--ink);color:#fff;font-family:var(--font-d);font-size:22px;padding:10px 22px;border-radius:999px;transition:transform .4s cubic-bezier(.2,1.5,.4,1);white-space:nowrap}
.toast.show{transform:translate(-50%,0);visibility:visible}

.reveal{opacity:0;transform:translateY(40px) rotateX(12deg);transition:opacity .8s,transform .8s cubic-bezier(.2,1,.3,1)}
.reveal.in{opacity:1;transform:none}

@media (max-width:860px){
  .nav{display:none}
  .topbar{padding-right:8px}
  .sound-toggle{margin-left:auto}
  .dive{grid-template-columns:1fr;gap:0;padding-bottom:80px}
  .dive-rail{position:sticky;top:calc(100svh - 92px);z-index:6;height:0}
  .sub-wrap{position:absolute;top:0;right:0;flex-direction:row;gap:2px;background:rgba(255,255,255,.96);border:3px solid var(--ink);border-radius:999px;padding:2px 14px 2px 4px;box-shadow:0 4px 0 var(--ink)}
  .sub-img{width:70px}
  .gauge{border:0;box-shadow:none;padding:0;background:none;gap:4px}
  .gauge b{font-size:26px}
  .sub-light{display:none}
  .zones{padding-top:10px;gap:24vh}
  .zone{min-height:auto;padding:22px 18px}
  .world-info{position:relative;left:auto;top:auto;width:auto;border:0;border-top:4px solid var(--ink);border-radius:0;box-shadow:none}
  .spot{width:44px;height:44px;font-size:22px}
  .protect{grid-template-columns:1fr}
  .pledge-grid{grid-template-columns:1fr 1fr}
  .home-stage{grid-template-columns:1fr}
}
@media (max-width:560px){
  body{font-size:17px}
  .l-whale{width:70vw;top:16%}.l-jelly{width:20vw;top:12%;right:2%}.l-turtle{width:38vw;left:-4%;bottom:8%}.l-clown{width:22vw;left:36%;bottom:6%}.l-dolphin{width:32vw;right:-2%;bottom:3%}
  .hero-copy{padding-bottom:34vh}
  .hero-sub{font-size:18px}
  .hero-kicker{font-size:20px}
  .z-animals figure{width:84px}.z-animals img{width:80px;height:80px}.z-animals figcaption{font-size:16px}
  .zone p{font-size:17px}
  .trench-bottom p{position:relative;left:auto;bottom:auto;transform:none;width:auto;margin-top:12px}
  .trench-bottom img{aspect-ratio:4/3}
  .mem-grid{gap:8px}
  .game{padding:18px 12px}
  .gtab{font-size:19px;padding:8px 14px}
  .pledge{padding:20px 14px}
  .pledge-grid{grid-template-columns:1fr}
  .harm-item{grid-template-columns:44px 1fr;padding:12px 14px}.hi{width:44px;height:44px}
  .btn-big{font-size:22px;padding:12px 24px}
  .card{height:450px}
  #homeImg{height:160px}
  .bubble{right:-4px;font-size:17px}
  .hz{padding:12px 14px}.hz b{font-size:21px}
  .trash-sea{height:380px}
  .ti{width:62px;height:62px}
  .torch-sea{height:400px}
  .glow{width:80px;height:80px}
  .toast{font-size:18px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .swim-l{animation:none;transform:translateX(50vw)}
  .reveal{opacity:1;transform:none}
}

/* bilingual */
.lang-toggle{display:flex;gap:2px;padding:3px;border:3px solid var(--ink,#2B2118);border-radius:999px;background:#fff;flex:none;margin-left:auto}
.lang-toggle button{font-family:var(--font-d,inherit);font-size:14px;padding:4px 10px;border-radius:999px;border:0;background:transparent;cursor:pointer;color:inherit}
.lang-toggle button.on{background:var(--sun,#FFC83D)}
.lang-toggle-float{position:fixed;top:14px;right:14px;z-index:80;margin:0;box-shadow:0 4px 0 rgba(0,0,0,.35)}
html.lang-en .zh{display:none!important}
html.lang-zh .en,html:not(.lang-en) .en{display:none!important}
html.lang-en .en{display:initial!important}
html.lang-zh .zh,html:not(.lang-en) .zh{display:initial!important}