:root{color-scheme:dark;--cream:#fff9ed;--muted:#e7e7d9;--ink:#1c393a;--orange:#eb996e;--line:#ffffff3d}
*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden}body{font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;background:#243e48;color:var(--cream)}button{font:inherit;color:inherit;cursor:pointer;-webkit-tap-highlight-color:transparent}button:focus-visible{outline:2px solid #ffe3ad;outline-offset:5px}[hidden]{display:none!important}
#game{width:100%;height:100%;height:100svh;position:relative;overflow:hidden;isolation:isolate;user-select:none;-webkit-user-select:none}#scene,.vignette{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}#scene{z-index:-3}.vignette{z-index:-2;background:linear-gradient(180deg,#112c3b33 0%,transparent 25%,transparent 68%,#0c262c6e 100%)}
.topbar{position:absolute;top:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;padding:24px 32px;padding-top:max(24px,env(safe-area-inset-top));z-index:5}.brand{display:flex;align-items:center;gap:11px;font-size:15px;letter-spacing:1.5px;font-weight:700;text-shadow:0 1px 12px #123b3b44}.brand small{display:block;font:8px/2 ui-monospace,monospace;letter-spacing:2.1px;opacity:.75}.road-mark{width:40px;height:43px;border:1px solid #fff9ed77;border-radius:11px;background:#15383e22;display:grid;place-items:center;transform:rotate(-6deg)}.road-mark svg{width:27px;height:27px}.top-actions{display:flex;align-items:center;gap:10px}.version{font-size:10px;letter-spacing:1.5px;padding:7px 11px;border:1px solid #fff9ed33;border-radius:20px;background:#1c424525;margin-right:5px}.icon-button{height:39px;width:39px;border:1px solid #fff9ed55;border-radius:50%;background:#15383e30;backdrop-filter:blur(9px);display:grid;place-items:center;transition:background .2s}.icon-button:hover{background:#fff9ed30}.icon-button svg{width:18px;height:18px}
.intro{position:absolute;inset:0;display:flex;align-items:center;padding:85px 7vw 115px;background:linear-gradient(90deg,#16353d50,transparent 61%);z-index:2}.intro-copy{max-width:510px;animation:enter .7s ease both}.route-label{display:flex;align-items:center;gap:12px;font-size:11px;letter-spacing:2px;color:#fff0cf;margin-bottom:22px}.route-number{border-bottom:1px solid #fff0cf99;padding:5px 0;font:10px ui-monospace,monospace;letter-spacing:2px}.intro h1{font-size:clamp(60px,6.5vw,92px);font-weight:850;line-height:1.12;letter-spacing:-4px;margin:0 0 23px;text-shadow:0 3px 32px #1a3a3e22}.intro h1>span{display:block}.title-dot{color:#ffc19b}.tagline{font-size:15px;letter-spacing:1px;margin:0 0 24px}.intro-detail{font-size:12px;line-height:2;color:#fff4de;margin:0 0 30px;opacity:.85;text-shadow:0 1px 8px #183c3c55}.primary-button{border:1px solid #ffc3a06b;background:#efaa7d;color:#243b38;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:30px;padding:0 22px;border-radius:13px;box-shadow:0 7px 22px #183c3b22;font-weight:750;transition:background .15s,transform .15s;width:100%;max-width:290px;letter-spacing:.5px}.primary-button>span:last-child{font-size:23px;font-weight:400}.primary-button:hover{background:#ffc69b;transform:translateY(-2px)}.primary-button:active{transform:translateY(1px)}.intro-record{margin-top:19px;font-size:10px;color:#fff1d9;text-shadow:0 1px 8px #183c3c66}.intro-record strong{color:#fff9ed;font:600 13px ui-monospace,monospace;margin:0 4px}.intro-record>span{opacity:.65}.postcard{position:absolute;right:6vw;top:25%;padding:16px 18px;text-align:right;opacity:.85;border-right:1px solid #fff9ed66;text-shadow:0 1px 10px #15363e44}.postcard>span{font-size:10px;letter-spacing:3px}.postcard strong{display:block;font-size:16px;letter-spacing:3px;margin:9px 0 12px;font-weight:500}.postcard i{font:8px ui-monospace,monospace;letter-spacing:1.5px;opacity:.7}
.hud{position:absolute;top:24px;left:50%;transform:translateX(-50%);width:240px;text-align:center;pointer-events:none;padding:14px 20px 13px;background:linear-gradient(145deg,#11354078,#1c3a4245);backdrop-filter:blur(15px);border:1px solid #fff9ed33;border-radius:19px;box-shadow:0 6px 30px #12313111}.eyebrow{font-size:9px;letter-spacing:2px;opacity:.7}.distance strong{font:400 43px/1.23 ui-monospace,"Courier New",monospace;letter-spacing:-2px;font-variant-numeric:tabular-nums}.unit{font-size:10px;opacity:.7;margin-left:8px}.record-line{display:flex;justify-content:center;align-items:center;gap:9px;font-size:9px;white-space:nowrap;color:#f7ead4}.record-line b{font-family:ui-monospace,monospace;font-weight:400}.dot{width:2px;height:2px;background:currentColor;border-radius:50%;opacity:.55}
.bottom-area{position:absolute;bottom:0;left:0;right:0;padding:0 32px max(18px,env(safe-area-inset-bottom));z-index:3;pointer-events:none}.steering{display:flex;align-items:center;justify-content:space-between;max-width:900px;margin:0 auto 17px;gap:20px}.steer-button{touch-action:none;pointer-events:auto;width:160px;height:64px;border:1px solid #fff9ed66;background:linear-gradient(145deg,#fdf4de26,#1d485140);backdrop-filter:blur(13px);border-radius:18px;display:flex;align-items:center;justify-content:center;gap:18px;transition:background .12s,border-color .12s,transform .12s;box-shadow:inset 0 1px #ffffff18,0 5px 15px #16393c11}.steer-button:hover{background:#fff9ed33}.steer-button.active{background:#e7a97e99;border-color:#fff2cc;transform:scale(.97)}.steer-arrow{font:28px system-ui;font-weight:300}.steer-button>span:not(.steer-arrow){font-size:11px;letter-spacing:1.2px}.steer-button kbd{display:block;font:8px/1.6 ui-monospace,monospace;letter-spacing:1px;opacity:.6;margin-top:3px}.steering-caption{font-size:10px;letter-spacing:1px;color:#fff4da;display:flex;flex-direction:column;align-items:center;gap:8px;opacity:.7;white-space:nowrap}.mini-road{height:20px;width:18px;border-left:1px solid currentColor;border-right:1px solid currentColor;transform:perspective(30px) rotateX(30deg);position:relative}.mini-road:after{content:"";position:absolute;border-left:1px dashed currentColor;left:50%;height:100%}footer{display:flex;justify-content:space-between;border-top:1px solid #fff9ed20;padding-top:12px;font-size:9px;letter-spacing:1px;color:#fff4da8c}.drive-message{position:absolute;top:230px;left:50%;transform:translateX(-50%);font-size:12px;letter-spacing:1.5px;text-align:center;white-space:nowrap;color:#fff8e7;text-shadow:0 2px 10px #153641aa;opacity:0;transition:opacity .3s;pointer-events:none;z-index:3}.drive-message.visible{opacity:1}.warning{position:absolute;bottom:190px;left:50%;transform:translateX(-50%);width:265px;text-align:center;padding:12px 17px;background:#66392bdf;border:1px solid #f4b382;border-radius:12px;z-index:4;font-size:11px;letter-spacing:1px;backdrop-filter:blur(10px)}.warning-track{height:3px;background:#fff2dc33;margin-top:10px;border-radius:3px;overflow:hidden}.warning-track i{display:block;height:100%;background:#f9c18d;transform-origin:left}
.modal-layer{position:absolute;inset:0;background:#10353d66;backdrop-filter:blur(10px);z-index:10;display:grid;place-items:center;padding:24px;overflow:auto}.modal-card{width:min(100%,390px);padding:33px;background:#fff6e5;color:#25423e;border:1px solid #ffffffa6;border-radius:25px;box-shadow:0 30px 100px #102b3040;animation:enter .3s ease both}.modal-card h2{font-size:30px;font-weight:750;line-height:1.4;letter-spacing:-1px;margin:15px 0 18px}.modal-card p{font-size:12px;line-height:1.9;color:#62776b;margin-bottom:25px}.modal-card .primary-button{max-width:none}.text-button{display:block;margin:22px auto 0;background:none;border:0;font-size:11px;letter-spacing:1px;color:#6d7c71;padding:6px}.text-button:hover{color:#243c40}.result-stamp{font-size:10px;letter-spacing:2px;color:#a56c4b}.result-distance strong{font:500 63px/1.2 ui-monospace,monospace;letter-spacing:-3px}.result-distance>span{font-size:13px;margin-left:10px}.result-meta{display:flex;justify-content:space-between;border-top:1px dashed #25423e30;padding:17px 0 25px;font-size:10px;color:#788577}.result-meta b{display:block;color:#25423e;font:500 13px ui-monospace,monospace;margin-top:6px}body[data-mode="playing"] .version,body[data-mode="paused"] .version{display:none}body[data-mode="intro"] .steer-button{opacity:.45}body[data-mode="crashed"] .bottom-area{opacity:.4}
@keyframes enter{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1600px){.intro{padding-left:11vw}}
@media(max-width:900px){.hud{top:92px;width:226px;padding:10px 17px}.distance strong{font-size:37px}.postcard{right:4vw}.intro{padding-left:5vw}.brand{font-size:13px}.brand small{font-size:7px}.version{font-size:9px}}
@media(max-width:700px){.topbar{padding:19px 20px;padding-top:max(19px,env(safe-area-inset-top))}.brand{font-size:12px;gap:8px}.brand small{font-size:7px;letter-spacing:1.3px}.road-mark{width:31px;height:35px;border-radius:9px}.road-mark svg{width:23px;height:23px}.top-actions{gap:7px}.version{font-size:8px;padding:6px 8px;letter-spacing:.5px;margin:0}.icon-button{width:34px;height:34px}.intro{align-items:flex-start;padding:128px 26px 145px;background:linear-gradient(180deg,#193d4512,transparent 65%)}.intro-copy{max-width:100%;width:100%}.route-label{font-size:9px;letter-spacing:1.1px;gap:10px;margin-bottom:17px}.route-number{font-size:8px;letter-spacing:1.3px}.intro h1{font-size:clamp(43px,12.2vw,68px);line-height:1.12;letter-spacing:-2px;margin-bottom:18px}.intro h1>span{display:inline}.tagline{font-size:11px;letter-spacing:.5px;margin-bottom:20px}.intro-detail{font-size:11px;line-height:1.9;margin-bottom:23px}.primary-button{min-height:52px;max-width:275px;font-size:12px;border-radius:12px}.intro-record{font-size:9px;margin-top:16px}.intro-record strong{font-size:12px}.postcard{display:none}.hud{top:88px;left:20px;transform:none;width:182px;padding:10px 13px;border-radius:17px}.distance strong{font-size:34px}.eyebrow{font-size:8px;letter-spacing:1.2px}.record-line{font-size:8px}.bottom-area{padding:0 18px max(18px,env(safe-area-inset-bottom))}.steering{gap:8px;margin-bottom:15px}.steer-button{width:clamp(102px,30vw,126px);height:64px;border-radius:16px;gap:10px}.steer-button>span:not(.steer-arrow){font-size:10px;letter-spacing:.5px}.steer-arrow{font-size:24px}.steer-button kbd{font-size:8px}.steering-caption{font-size:8px;letter-spacing:0;gap:7px}.mini-road{height:17px;width:15px}footer{font-size:8px;letter-spacing:0;padding-top:11px}.desktop-only{display:none}.drive-message{top:286px;font-size:10px;letter-spacing:.8px}.warning{bottom:165px;width:245px;font-size:10px}.modal-card{padding:27px;border-radius:22px}.modal-card h2{font-size:28px}.result-distance strong{font-size:56px}}
@media(max-height:720px) and (min-width:701px){.intro h1{font-size:60px}.intro{padding-top:90px}.route-label{margin-bottom:14px}.tagline{margin-bottom:16px}.intro-detail{margin-bottom:20px}.intro-record{margin-top:16px}.steer-button{height:57px}.steering{margin-bottom:12px}}
@media(max-width:700px) and (max-height:720px){.intro{padding-top:104px}.intro h1{font-size:43px;margin-bottom:14px}.route-label{margin-bottom:12px}.tagline{margin-bottom:15px}.intro-detail{margin-bottom:17px;font-size:10px}.intro-record{margin-top:14px}.hud{top:80px;padding-top:9px;padding-bottom:10px}.distance strong{font-size:33px}.steer-button{height:55px}.steering{margin-bottom:11px}.bottom-area{padding-bottom:12px}.warning{bottom:145px}.modal-card{padding:22px}.modal-card h2{font-size:25px;margin:10px 0}.modal-card p{margin-bottom:16px}.result-distance strong{font-size:48px}.result-meta{padding:12px 0 18px}.text-button{margin-top:16px}.drive-message{top:265px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}.primary-button{transition:none}}

@media(max-height:520px){.topbar{padding:14px 22px}.brand{font-size:12px}.road-mark{width:30px;height:33px}.brand small{font-size:6px}.icon-button{width:32px;height:32px}.intro{align-items:flex-start;padding:79px 28px 85px}.intro-copy{max-width:370px}.route-label{display:none}.intro h1{font-size:43px;line-height:1.12;margin-bottom:11px;letter-spacing:-2px}.intro h1>span{display:inline}.tagline{font-size:11px;margin-bottom:17px}.intro-detail{display:none}.primary-button{min-height:45px;max-width:260px;font-size:12px}.intro-record{margin-top:12px;font-size:9px}.postcard{top:29%;font-size:10px}.hud{top:16px;left:50%;transform:translateX(-50%);width:226px;padding:7px 13px;border-radius:14px}.distance .eyebrow{display:none}.distance strong{font-size:25px;line-height:1.15}.record-line{font-size:8px}.steer-button{height:48px;width:125px}.steering{margin-bottom:9px}.bottom-area{padding-bottom:11px}.steering-caption{font-size:8px}.mini-road{height:15px}.warning{bottom:115px}.modal-card{padding:20px;width:360px}.modal-card h2{font-size:23px;margin:8px 0}.modal-card p{font-size:10px;margin-bottom:13px}.result-distance strong{font-size:39px}.result-meta{padding:10px 0 15px}.text-button{margin-top:12px}}