:root{--ink:#184e67;--orange:#f8a914;--paper:#fff7cc;--sea:#38c6e5}*{box-sizing:border-box}body{margin:0;background:#062c4d;font-family:"Microsoft YaHei",system-ui,sans-serif;color:var(--ink);overflow:hidden}button{font:inherit;cursor:pointer}#app{width:960px;height:720px;position:relative;margin:0 auto;overflow:hidden;background:#65d5f0 url("../assets/img_hd/linklink_background.png") center/cover no-repeat;box-shadow:0 0 35px #000}@media(max-width:960px){#app{transform:scale(calc(100vw / 960));transform-origin:top left}body{min-height:calc(100vw * .75)}}.screen{display:none;width:100%;height:100%;position:absolute;inset:0}.screen.active{display:block}.screen::before{content:"";position:absolute;inset:0;background:linear-gradient(#078fe4aa 0%,#28c6e877 43%,#fbdb9977 100%);pointer-events:none}#home{background:url("../assets/img_hd/linklink_background.png") center/cover}.home-actions{position:absolute;top:28px;display:flex;gap:13px;z-index:1}.left-actions{left:30px}.right-actions{right:30px}.round-btn,.tool-btn{width:52px;height:52px;border:4px solid white;border-radius:50%;background:var(--orange);color:#fff;font-size:33px;font-weight:900;line-height:1;box-shadow:0 3px 0 #aa6506;text-shadow:0 2px #aa6506}.round-btn:hover,.tool-btn:hover,.play-btn:hover{filter:brightness(1.08);transform:translateY(-1px)}.title-wrap{position:absolute;top:180px;width:100%;text-align:center;color:white;text-shadow:0 4px 0 #176176,0 7px 8px #103a50;z-index:1}.title-wrap .logo{display:none}.title-wrap h1{display:inline;font-size:72px;letter-spacing:5px;margin:0;font-weight:900}.title-wrap span{font-size:80px;color:#ec562b;font-weight:900}.play-btn{position:absolute;z-index:1;left:380px;top:380px;width:200px;height:75px;background:#f6b321;border:5px solid white;border-radius:14px;box-shadow:0 5px 0 #ae6b09;color:#3e270f;font-size:42px;transform:rotate(-3deg)}.home-tip{position:absolute;top:490px;width:100%;text-align:center;color:white;font-weight:bold;text-shadow:0 2px #12627e;z-index:1}.corner-back{position:absolute;z-index:2;left:34px;top:32px}#modes,#levels,#loading{background:url("../assets/img_hd/linklink_background.png") center/cover}h2{position:relative;z-index:1;text-align:center;color:white;font-size:46px;margin:55px 0 4px;text-shadow:0 4px #16617a}.subtitle{position:relative;z-index:1;text-align:center;color:#fff7ca;font-size:20px;text-shadow:0 2px #16617a;margin:0}.mode-cards{position:relative;z-index:1;display:flex;justify-content:center;gap:35px;margin-top:115px}.mode-card{width:230px;height:305px;border:7px solid #fff;border-radius:25px;background:#f7bb42;color:#18556e;box-shadow:0 7px 0 #aa6506;padding:20px;position:relative}.mode-card.endless{background:#bad535}.mode-card.rush{background:#f6a643}.mode-card b{display:block;font-size:30px;margin-top:26px}.mode-card small{display:block;font-size:16px;margin-top:13px}.mode-card i{display:block;margin:38px auto;font-style:normal;font-size:85px;color:white;text-shadow:0 4px #176176}.level-grid{position:relative;z-index:1;width:690px;margin:30px auto;display:grid;grid-template-columns:repeat(6,1fr);gap:18px}.level-btn{height:72px;border-radius:18px;border:4px solid white;background:#ffbf2c;color:white;font-size:25px;font-weight:900;text-shadow:0 2px #9f5a08;box-shadow:0 4px #a56208}.level-btn.done{background:#4fc8db}.level-btn.locked{background:#7692a3;color:#c8d4da;box-shadow:0 4px #4d6574;cursor:not-allowed}.loading-box{position:absolute;z-index:1;top:220px;left:280px;width:400px;padding:36px;border:6px solid white;border-radius:30px;background:#fff3bd;text-align:center;box-shadow:0 7px #176176}.loading-box h2{font-size:35px;color:#176176;text-shadow:none;margin:10px}.loading-box p{font-weight:bold}.bubble{font-size:35px;color:#f5aa1d;letter-spacing:12px;animation:pulse 1s infinite}@keyframes pulse{50%{opacity:.35;transform:translateY(-8px)}}#game{background:url("../assets/img_hd/linklink_background.png") center/cover}.hud{position:absolute;z-index:2;left:16px;top:14px;right:24px;height:83px;display:flex;align-items:center;gap:10px}.avatar{width:75px;height:75px;border:5px solid #78d9ec;background:#fff;border-radius:12px;font-size:28px;display:grid;place-items:center}.level-label{width:66px;text-align:center;color:white;text-shadow:0 2px #176176;font-size:14px}.level-label b{font-size:20px}.timer-area{display:flex;align-items:center;gap:9px;flex:1}.timer-bar{height:24px;flex:1;border:4px solid #184e67;border-radius:20px;background:#d4ebef;padding:2px}.timer-bar i{display:block;width:100%;height:100%;border-radius:12px;background:linear-gradient(90deg,#f04b20,#fb9c18);transition:width .25s}.timer-area b{color:white;font-size:25px;text-shadow:0 2px #184e67;min-width:35px}.mode-pill{background:#fff7cc;border:3px solid #176176;border-radius:18px;padding:7px 13px;font-weight:bold}.toolbox{position:absolute;z-index:2;left:15px;top:130px;width:76px;padding:7px 10px;background:#1c627887;border-radius:25px;display:grid;gap:11px}.tool-btn{width:54px;height:54px;font-size:30px;position:relative;background:#2f849e;box-shadow:0 3px #17495e}.tool-btn em{position:absolute;right:-5px;top:-7px;font-size:15px;font-style:normal;background:#15495d;border:2px solid white;border-radius:50%;min-width:21px;padding:1px}.game-board{position:absolute;z-index:1;left:115px;top:107px;width:810px;height:550px;padding:12px;display:grid;gap:5px;align-content:center;justify-content:center;background:#164e5f93;border-radius:7px}.tile{border:4px solid white;border-radius:10px;background-color:#e5fcff;background-image:url("../assets/img_hd/linklink_background.png");background-repeat:no-repeat;background-size:960px 720px;box-shadow:0 2px 0 #286d80;transition:transform .13s,opacity .2s;position:relative}.tile:hover,.tile.selected{transform:scale(1.07);z-index:3}.tile.selected{outline:4px solid #ffe348;box-shadow:0 0 13px 5px #ffe348}.tile.hint{animation:hint .65s infinite alternate;z-index:2}.tile.cleared{visibility:hidden;pointer-events:none}@keyframes hint{to{outline:5px solid #fff16a;transform:scale(1.09)}}.path-line{position:absolute;height:5px;background:#ffe56c;border-radius:8px;transform-origin:left center;z-index:10;box-shadow:0 0 8px #fff}.game-status{position:absolute;z-index:2;bottom:28px;left:118px;right:35px;display:flex;justify-content:space-between;color:white;font-size:20px;font-weight:bold;text-shadow:0 2px #184e67}.overlay{position:fixed;inset:0;background:#001d2a99;z-index:20;display:grid;place-items:center}.overlay.hidden{display:none}.dialog{width:500px;min-height:270px;background:#1e2e34;border:8px solid #f8b946;border-radius:25px;box-shadow:0 10px 0 #0b252d;color:white;text-align:center;padding:28px}.dialog h3{font-size:43px;margin:0 0 15px}.dialog p{font-size:21px}.dialog .stars{font-size:42px;color:#ffd338;letter-spacing:8px}.dialog .dialog-actions{display:flex;justify-content:center;gap:20px;margin-top:24px}.dialog .dialog-actions button{border:4px solid white;border-radius:24px;background:#f5ac20;color:white;box-shadow:0 4px #a86506;padding:10px 22px;font-weight:bold;font-size:18px}.howto{background:#fff6c6;color:#174e67}.howto h3{color:#174e67}