:root{--navy:#102f3b;--navy2:#184552;--sea:#75c9c0;--sea-light:#d9f0e9;--foam:#f4f2e8;--paper:#ebe8dc;--coral:#e66b4d;--yellow:#f5c44e;--ink:#15353e;--muted:#687d7f;--line:rgba(21,53,62,.16);font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);background:#cad6d3}*{box-sizing:border-box}body{margin:0;min-height:100vh;letter-spacing:0;background:radial-gradient(circle at 50% 20%,#edf1eb,#bdceca)}button{font:inherit}.app-shell{width:min(1540px,100%);min-height:100vh;margin:auto;background:var(--foam);box-shadow:0 0 70px rgba(16,47,59,.18)}.topbar{height:74px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 30px;border-bottom:1px solid var(--line);background:#faf9f3}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);width:max-content}.brand-icon{width:38px;height:38px;display:grid;place-items:center;background:var(--coral);color:#fff;border-radius:50% 50% 45% 8%;font-size:19px;transform:rotate(-15deg)}.brand>span:last-child{display:flex;flex-direction:column}.brand strong{font:700 21px Georgia,"Songti SC",serif}.brand small{font-size:9px;color:var(--muted);margin-top:2px}.journey{text-align:center}.journey span{display:block;font-size:9px;color:var(--muted);letter-spacing:1px}.journey strong{font:700 14px Georgia,"Songti SC",serif}.header-actions{display:flex;justify-content:flex-end;gap:8px}.icon-btn{width:38px;height:38px;border:1px solid var(--line);border-radius:4px;background:transparent;color:var(--ink);font-weight:800;cursor:pointer}.level-btn{height:38px;padding:0 14px;border:0;border-radius:4px;background:var(--navy);color:#fff;font-weight:700;cursor:pointer}.level-btn b{margin-left:8px;color:var(--yellow)}.game-layout{display:grid;grid-template-columns:270px minmax(520px,1fr) 290px;min-height:calc(100vh - 74px)}.brief-panel,.log-panel{padding:30px 24px;background:var(--paper)}.brief-panel{border-right:1px solid var(--line);display:flex;flex-direction:column}.log-panel{border-left:1px solid var(--line);display:flex;flex-direction:column}.kicker{font-size:10px;color:var(--coral);font-weight:800;letter-spacing:1.4px}.brief-top h1{margin:10px 0 14px;font:700 29px/1.25 Georgia,"Songti SC",serif}.brief-top p{font-size:12px;color:var(--muted);line-height:1.8;margin:0}.progress-card{margin-top:25px;padding:15px;background:#faf9f3;border-left:3px solid var(--coral)}.progress-card>div:first-child{display:flex;justify-content:space-between;font-size:11px}.progress-card strong{color:var(--coral)}.progress-track{height:5px;margin-top:10px;background:#d7d8cf;overflow:hidden}.progress-track i{display:block;height:100%;width:0;background:var(--coral);transition:width .25s}.legend{margin-top:22px}.legend>div{display:flex;align-items:center;gap:11px;padding:10px 0;border-bottom:1px solid var(--line)}.legend p{margin:0}.legend b,.legend small{display:block;font-size:11px}.legend small{font-size:9px;color:var(--muted);margin-top:2px}.mini{width:34px;height:34px;display:grid;place-items:center;position:relative;background:#cde6df;border-radius:3px}.lighthouse-mini i,.demo-light{width:11px;height:20px;background:#fff;border:2px solid var(--navy);clip-path:polygon(25% 0,75% 0,100% 100%,0 100%)}.lighthouse-mini:after{content:"";position:absolute;top:5px;width:22px;height:5px;background:var(--yellow);border-radius:50%}.buoy-mini i,.demo-buoy{width:13px;height:13px;border-radius:50% 50% 45% 45%;background:var(--coral);border:3px solid #fff;box-shadow:0 3px 0 var(--navy)}.wave-mini{font-weight:800;color:#72928d}.hint-btn{margin-top:auto;display:flex;align-items:center;gap:10px;padding:13px;border:1px solid var(--line);border-radius:4px;background:transparent;color:var(--ink);text-align:left;cursor:pointer}.hint-btn:disabled{opacity:.5;cursor:not-allowed}.bulb{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:var(--yellow);font-size:18px}.hint-btn b,.hint-btn small{display:block;font-size:11px}.hint-btn small{font-size:9px;color:var(--muted);margin-top:2px}.board-stage{padding:25px 30px 20px;background:#f7f5ed;min-width:0}.stage-head{display:flex;justify-content:space-between;align-items:end;max-width:650px;margin:0 auto 13px}.level-meta span{display:block;font-size:9px;color:var(--coral);font-weight:800;letter-spacing:1px}.level-meta strong{font:700 20px Georgia,"Songti SC",serif}.timer{text-align:right}.timer small{display:block;font-size:9px;color:var(--muted)}.timer strong{font:700 19px Consolas,monospace}.chart-frame{--board-size:min(62vh,610px);position:relative;width:calc(var(--board-size) + 58px);height:calc(var(--board-size) + 58px);max-width:100%;margin:auto;padding:38px 20px 20px 38px;background:#d5ddd4;border:1px solid #b7c5bf;box-shadow:0 8px 24px rgba(16,47,59,.08);overflow:hidden}.chart-frame:before{content:"";position:absolute;inset:0;opacity:.32;background-image:linear-gradient(30deg,transparent 48%,#adc5be 49%,transparent 51%),linear-gradient(150deg,transparent 48%,#adc5be 49%,transparent 51%);background-size:90px 90px}.board{position:relative;z-index:2;width:var(--board-size);height:var(--board-size);display:grid;grid-template-columns:repeat(6,1fr);grid-template-rows:repeat(6,1fr);border:3px solid var(--navy);background:#9bd8ce;box-shadow:inset 0 0 0 2px rgba(255,255,255,.4)}.cell{position:relative;border:1px solid rgba(16,47,59,.17);background:transparent;cursor:pointer;padding:0;overflow:hidden}.cell:nth-child(even){background:rgba(255,255,255,.05)}.cell:hover:not(.lighthouse){background:rgba(255,255,255,.26)}.cell.lighthouse{cursor:default;background:rgba(244,242,232,.2)}.cell.conflict{background:rgba(230,107,77,.28);animation:shake .25s}.cell.hinted{animation:pulse 1s 2}.tower{position:absolute;left:50%;top:50%;transform:translate(-50%,-45%);width:28%;height:45%;background:#fff7db;border:2px solid var(--navy);clip-path:polygon(25% 0,75% 0,100% 100%,0 100%);filter:drop-shadow(2px 3px 0 rgba(16,47,59,.16))}.tower:before{content:"";position:absolute;left:-40%;top:12%;width:180%;height:20%;background:var(--yellow);border-top:2px solid var(--navy);border-bottom:2px solid var(--navy)}.tower:after{content:"";position:absolute;left:35%;bottom:0;width:30%;height:28%;background:var(--navy)}.light-rays{position:absolute;left:50%;top:24%;transform:translate(-50%,-50%);width:75%;height:22%;background:linear-gradient(90deg,transparent,var(--yellow),transparent);opacity:.5;clip-path:polygon(0 40%,45% 0,55% 0,100% 40%,55% 100%,45% 100%)}.buoy-piece{position:absolute;left:50%;top:48%;transform:translate(-50%,-50%);width:36%;aspect-ratio:1;border-radius:50%;background:var(--coral);border:4px solid #fff7db;box-shadow:0 5px 0 var(--navy),0 8px 8px rgba(16,47,59,.18)}.buoy-piece:before{content:"";position:absolute;width:32%;height:80%;left:34%;top:-70%;background:var(--navy);clip-path:polygon(35% 0,65% 0,65% 58%,100% 100%,0 100%,35% 58%)}.buoy-piece:after{content:"";position:absolute;width:200%;height:25%;left:-50%;top:120%;border-top:2px solid rgba(255,255,255,.65);border-radius:50%}.x-mark{position:absolute;inset:0;display:grid;place-items:center;color:#41776f;font:700 clamp(17px,3vw,28px) Georgia,serif;opacity:.65}.column-counts{position:absolute;z-index:3;left:38px;top:4px;width:var(--board-size);height:32px;display:grid;grid-template-columns:repeat(6,1fr)}.row-counts{position:absolute;z-index:3;left:4px;top:38px;width:32px;height:var(--board-size);display:grid;grid-template-rows:repeat(6,1fr)}.count{display:grid;place-items:center;font:700 16px Georgia,serif;color:var(--navy)}.count.done{color:#fff;background:var(--navy);border-radius:50%;width:25px;height:25px;align-self:center;justify-self:center}.count.over{color:var(--coral)}.compass{position:absolute;right:8px;top:6px;width:38px;height:38px;border:1px solid rgba(16,47,59,.25);border-radius:50%;display:grid;place-items:center;color:var(--navy);font:700 9px Georgia}.compass i{position:absolute;width:2px;height:23px;background:var(--coral);transform:rotate(18deg);clip-path:polygon(50% 0,100% 45%,50% 35%,0 45%)}.chart-stamp{position:absolute;right:8px;bottom:7px;text-align:right;color:rgba(16,47,59,.34);font:8px Consolas}.chart-stamp b{font-size:10px}.mode-bar{max-width:650px;height:54px;margin:12px auto 0;display:flex;align-items:center;gap:12px;border-top:1px solid var(--line)}.mode-bar>span{font-size:10px;color:var(--muted)}.segmented{height:34px;display:flex;background:#e0e1d9;padding:3px;border-radius:4px}.segmented button{border:0;background:transparent;padding:0 11px;color:var(--muted);font-size:10px;font-weight:700;cursor:pointer;border-radius:3px}.segmented button.active{background:#fff;color:var(--ink);box-shadow:0 1px 4px rgba(16,47,59,.1)}.segmented button b{margin-right:5px}.buoy-dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--coral);margin-right:5px}.board-actions{margin-left:auto;display:flex;gap:6px}.board-actions button{height:34px;min-width:34px;border:1px solid var(--line);background:transparent;border-radius:4px;color:var(--ink);cursor:pointer}.board-actions button:disabled{opacity:.35}.board-actions .check-btn{padding:0 13px;background:var(--navy);color:#fff;border:0;font-size:10px;font-weight:700}.feedback{max-width:650px;margin:0 auto;text-align:center;font-size:10px;color:var(--muted);min-height:16px}.feedback.error{color:var(--coral)}.feedback.good{color:#327c65}.rule-summary h2{font:700 22px Georgia,"Songti SC",serif;margin:8px 0 18px}.rule-summary ol{list-style:none;margin:0;padding:0}.rule-summary li{position:relative;padding:0 0 17px 34px}.rule-summary li:before{content:counter(list-item);position:absolute;left:0;top:0;width:22px;height:22px;display:grid;place-items:center;background:var(--navy);color:var(--yellow);border-radius:50%;font:700 11px Georgia}.rule-summary li:not(:last-child):after{content:"";position:absolute;left:11px;top:23px;width:1px;height:calc(100% - 22px);background:rgba(16,47,59,.2)}.rule-summary li b,.rule-summary li span{display:block;font-size:11px}.rule-summary li span{font-size:9px;color:var(--muted);line-height:1.6;margin-top:3px}.captain-log{margin-top:8px;padding-top:18px;border-top:1px solid var(--line)}.log-head{display:flex;justify-content:space-between;font-size:11px;font-weight:800}.log-head b{font-size:9px;color:var(--coral)}.event-log{margin-top:12px;font-size:9px;color:var(--muted);line-height:1.6}.event-log p{display:flex;gap:8px;margin:8px 0}.event-log i{flex:0 0 auto;width:6px;height:6px;border-radius:50%;background:var(--sea);margin-top:4px}.privacy-note{margin-top:auto;padding:12px;background:rgba(255,255,255,.4);border:1px dashed rgba(16,47,59,.22)}.privacy-note span{font-size:9px;font-weight:800;color:var(--coral)}.privacy-note p{font-size:8px;color:var(--muted);line-height:1.6;margin:4px 0 0}.drawer-backdrop{position:fixed;inset:0;background:rgba(9,29,35,.55);opacity:0;pointer-events:none;transition:.2s;z-index:20}.drawer-backdrop.open{opacity:1;pointer-events:auto}.level-drawer{position:fixed;z-index:21;right:0;top:0;width:min(430px,100%);height:100vh;padding:28px;background:var(--foam);transform:translateX(100%);transition:.25s;box-shadow:-20px 0 60px rgba(16,47,59,.25);overflow:auto}.level-drawer.open{transform:none}.drawer-head,.dialog-head{display:flex;justify-content:space-between;align-items:start}.drawer-head h2,.dialog-head h2{margin:5px 0 20px;font:700 25px Georgia,"Songti SC",serif}.level-group{margin-bottom:25px}.level-group-head{display:flex;justify-content:space-between;margin-bottom:9px}.level-group-head b{font-size:12px}.level-group-head span{font-size:9px;color:var(--muted)}.level-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:7px}.level-tile{aspect-ratio:1;border:1px solid var(--line);background:#fff;border-radius:4px;color:var(--ink);cursor:pointer;font:700 13px Georgia}.level-tile.current{background:var(--navy);color:var(--yellow)}.level-tile.done:after{content:"✓";display:block;color:var(--coral);font-size:8px}dialog{width:min(760px,calc(100% - 30px));border:0;border-radius:6px;padding:28px;background:var(--foam);color:var(--ink);box-shadow:0 30px 80px rgba(7,27,34,.35)}dialog::backdrop{background:rgba(9,29,35,.72);backdrop-filter:blur(3px)}.rule-visuals{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.rule-visuals article{padding:18px;background:#fff;border-top:3px solid var(--sea)}.rule-visuals article>b{display:block;font:700 14px Georgia,"Songti SC",serif;margin-top:13px}.rule-visuals p{font-size:10px;color:var(--muted);line-height:1.7}.demo-grid{height:85px;position:relative;background-color:#b9e4dc;background-image:linear-gradient(rgba(16,47,59,.13) 1px,transparent 1px),linear-gradient(90deg,rgba(16,47,59,.13) 1px,transparent 1px);background-size:33.33% 33.33%}.demo-grid i{position:absolute}.demo-light{left:44%;top:37%}.demo-buoy{left:74%;top:44%}.distance-demo i{width:13px;height:13px;border-radius:50%;background:var(--coral);border:3px solid white;top:38%;left:22%;box-shadow:0 3px var(--navy)}.distance-demo i:last-child{left:67%;opacity:.35}.demo-count{height:85px;display:flex;align-items:center;justify-content:center;gap:16px;background:#d8e4df}.demo-count span{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:var(--navy);color:#fff;font:700 15px Georgia}.dialog-tip{font-size:9px;color:var(--muted);text-align:center;margin:18px 0 0}.success-dialog{text-align:center;width:min(430px,calc(100% - 30px))}.success-mark{width:64px;height:64px;display:grid;place-items:center;margin:0 auto 14px;border-radius:50%;background:var(--navy);color:var(--yellow);font-size:28px}.success-dialog h2{font:700 24px Georgia,"Songti SC",serif;margin:7px 0}.success-dialog>p{font-size:11px;color:var(--muted)}.result-stats{display:grid;grid-template-columns:repeat(3,1fr);margin:22px 0;background:#e1e3db}.result-stats div{padding:12px;border-right:1px solid var(--line)}.result-stats div:last-child{border:0}.result-stats small,.result-stats strong{display:block}.result-stats small{font-size:9px;color:var(--muted)}.result-stats strong{font:700 18px Georgia}.success-actions{display:flex;gap:8px;justify-content:center}.success-actions button{height:39px;padding:0 18px;border:1px solid var(--line);background:transparent;border-radius:4px;color:var(--ink);cursor:pointer}.success-actions .primary{background:var(--coral);color:#fff;border:0;font-weight:700}@keyframes shake{25%{transform:translateX(-2px)}75%{transform:translateX(2px)}}@keyframes pulse{50%{background:#f7d777}}
@media(max-width:1100px){.game-layout{grid-template-columns:220px minmax(500px,1fr)}.log-panel{display:none}.brief-panel{padding:24px 18px}.chart-frame{--board-size:min(61vh,560px)}}
@media(max-width:760px){.topbar{height:64px;padding:0 14px;grid-template-columns:1fr auto}.journey{display:none}.header-actions{gap:5px}.game-layout{display:flex;flex-direction:column;min-height:0}.brief-panel{border:0;border-bottom:1px solid var(--line);padding:17px 16px;display:grid;grid-template-columns:1fr auto;align-items:center}.brief-top h1{font-size:21px;margin:4px 0}.brief-top p,.legend,.progress-card{display:none}.hint-btn{margin:0;padding:9px}.hint-btn small{display:none}.board-stage{padding:17px 10px 12px}.stage-head{padding:0 6px}.chart-frame{--board-size:min(calc(100vw - 68px),510px);width:calc(var(--board-size) + 50px);height:calc(var(--board-size) + 50px);padding:33px 17px 17px 33px}.column-counts{left:33px;top:2px;height:30px}.row-counts{left:2px;top:33px;width:30px}.count{font-size:14px}.board{border-width:2px}.compass,.chart-stamp{display:none}.mode-bar{height:auto;min-height:56px;flex-wrap:wrap;padding:9px 4px 0}.mode-bar>span{display:none}.segmented{order:1}.board-actions{order:2}.board-actions .check-btn{padding:0 10px}.feedback{padding-top:5px}.rule-visuals{grid-template-columns:1fr}.rule-visuals article{display:grid;grid-template-columns:100px 1fr;column-gap:12px}.rule-visuals article>b{align-self:end}.rule-visuals article p{margin-top:4px}.demo-grid,.demo-count{grid-row:span 2}.tower{border-width:1px}.buoy-piece{border-width:2px;box-shadow:0 3px 0 var(--navy)}}
.level-tile{aspect-ratio:auto;height:42px;font-size:11px}
.game-footer{min-height:78px;padding:15px 30px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:24px;border-top:1px solid var(--line);background:#102f3b;color:#d9e5e0}.game-footer a{color:inherit;text-decoration:none}.game-footer>p{margin:0;text-align:center;color:#9db1ad;font-size:10px}.game-footer>a:last-child{font-size:10px;color:#f5c44e}.footer-brand{display:grid;grid-template-columns:30px auto;grid-template-rows:auto auto;column-gap:9px;align-items:center}.footer-brand span{grid-row:1/3;width:30px;height:30px;display:grid;place-items:center;border-radius:4px;background:#e66b4d;color:white;font:700 13px Georgia}.footer-brand b{font:700 13px Georgia}.footer-brand small{font-size:8px;color:#9db1ad}.board.invalid{animation:shake .25s 2}
@media(max-width:760px){.game-footer{grid-template-columns:1fr auto;padding:18px 16px}.game-footer>p{grid-column:1/-1;grid-row:2;text-align:left}.game-footer>a:last-child{grid-column:2;grid-row:1}}
.audio-toggle{position:relative}.audio-toggle.playing{background:var(--coral);border-color:var(--coral);color:#fff}.audio-toggle.playing:after{content:"";position:absolute;right:4px;top:4px;width:5px;height:5px;border-radius:50%;background:var(--yellow);box-shadow:0 0 0 3px rgba(245,196,78,.2);animation:audioPulse 1.8s infinite}.officer-dialogue{height:94px;margin-top:12px;padding:11px;display:grid;grid-template-columns:38px 1fr;gap:10px;background:#faf9f3;border-left:3px solid var(--sea)}.officer-avatar{position:relative;width:38px;height:38px;display:grid;place-items:center;border-radius:50%;background:var(--navy);color:var(--yellow);font:700 13px Georgia}.officer-avatar i{position:absolute;right:-1px;bottom:0;width:9px;height:9px;border:2px solid #faf9f3;border-radius:50%;background:#54ad8d}.officer-copy{min-width:0}.officer-copy b{display:block;font-size:9px;color:var(--coral)}.officer-copy p{margin:5px 0 0;font-size:9px;line-height:1.55;color:var(--muted)}.officer-dialogue.speaking .officer-avatar{animation:officerSpeak .45s 2}.dialogue-actions{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:7px}.dialogue-actions button{height:28px;border:1px solid var(--line);border-radius:3px;background:transparent;color:var(--ink);font-size:9px;cursor:pointer}.dialogue-actions button:hover{background:#fff}.mobile-officer{display:none}@keyframes officerSpeak{50%{transform:translateY(-2px)}}@keyframes audioPulse{50%{opacity:.35;transform:scale(.75)}}
@media(max-width:760px){.mobile-officer{position:fixed;z-index:15;left:12px;right:12px;bottom:12px;min-height:66px;padding:10px 38px 10px 58px;display:none;align-items:center;background:var(--navy);color:#fff;box-shadow:0 8px 30px rgba(9,29,35,.28);border-left:3px solid var(--coral)}.mobile-officer.open{display:flex}.mobile-officer b{font-size:9px;color:var(--yellow)}.mobile-officer p{margin:3px 0 0;font-size:9px;line-height:1.45;color:#c3d2ce}.mobile-avatar{position:absolute;left:10px;width:36px;height:36px;border:0;border-radius:50%;background:var(--coral);color:#fff;font-weight:800}.mobile-close{position:absolute;right:7px;top:7px;border:0;background:transparent;color:#fff;font-size:17px}.audio-toggle{display:grid}}
@media(prefers-reduced-motion:reduce){.audio-toggle.playing:after,.officer-dialogue.speaking .officer-avatar{animation:none}}
@media(min-width:761px) and (max-width:1100px){.mobile-officer{position:fixed;z-index:15;right:18px;bottom:18px;width:310px;min-height:66px;padding:10px 38px 10px 58px;display:none;align-items:center;background:var(--navy);color:#fff;box-shadow:0 8px 30px rgba(9,29,35,.28);border-left:3px solid var(--coral)}.mobile-officer.open{display:flex}.mobile-officer b{font-size:9px;color:var(--yellow)}.mobile-officer p{margin:3px 0 0;font-size:9px;line-height:1.45;color:#c3d2ce}.mobile-avatar{position:absolute;left:10px;width:36px;height:36px;border:0;border-radius:50%;background:var(--coral);color:#fff;font-weight:800}.mobile-close{position:absolute;right:7px;top:7px;border:0;background:transparent;color:#fff;font-size:17px}}