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:root{color-scheme:dark;--bg:#101c1c;--text:#eee9df;--muted:#a8b5ad;--gold:#dab17a;--line:#ffffff24;--paper:#f2ede1;--ink:#302d25;--serif:'Songti SC','Noto Serif CJK SC','SimSun',serif;--sans:'Microsoft YaHei','PingFang SC',sans-serif;--mono:Consolas,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.9 var(--sans)}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation;outline-offset:5px}button{cursor:pointer;border:1px solid var(--line)}button:disabled{opacity:.45;cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--gold)}[hidden]{display:none!important}header,footer{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:22px 5%;border-bottom:1px solid var(--line)}header nav{display:flex;gap:26px;font-size:12px}.wordmark{font:26px var(--serif)}.wordmark span{font:11px var(--sans);margin-left:16px;color:var(--muted)}.quiet{background:transparent;color:var(--muted);font-size:11px;padding:8px 12px}main{max-width:1440px;margin:auto}.intro{padding:60px 6% 48px;display:flex;justify-content:space-between;align-items:center}.eyebrow{font:11px/1.7 var(--mono);letter-spacing:2px;color:var(--gold)}h1,h2,h3,p{overflow-wrap:break-word}h1,h2,h3{font-family:var(--serif);font-weight:400}h1{font-size:76px;line-height:1.2;letter-spacing:10px;margin:20px 0}h1 span{display:inline-block;font-size:24px;letter-spacing:4px;margin-left:30px;color:#c0c5b9}.intro-copy{color:var(--muted);font-size:14px;line-height:2.1}.intro-seal{display:grid;justify-items:center;gap:20px;font:11px var(--serif);letter-spacing:3px;color:var(--muted)}.taiji{position:relative;width:80px;height:80px;border-radius:50%;background:linear-gradient(90deg,#e6deca 50%,#29413b 50%);border:1px solid #cbb88f55;animation:rotate 35s linear infinite}.taiji:before,.taiji:after{content:'';position:absolute;left:25%;width:50%;height:50%;border-radius:50%;background:#29413b;border:15px solid #e6deca}.taiji:after{top:50%;background:#e6deca;border-color:#29413b}@keyframes rotate{to{transform:rotate(360deg)}}
.game-layout{display:grid;grid-template-columns:1.15fr 1fr;border-block:1px solid var(--line);margin:0 4%;background:#0b1516}.ritual{padding:26px 28px 30px;min-width:0;position:relative;text-align:center}.instrument-top{display:flex;justify-content:space-between;font:11px var(--mono);color:var(--gold);letter-spacing:2px}.furnace-stage{position:relative;aspect-ratio:1.23;overflow:hidden;isolation:isolate;margin:12px -28px 0}.furnace-stage img{width:100%;height:100%;object-fit:cover;display:block;opacity:.95;mask-image:linear-gradient(transparent,#000 12%,#000 80%,transparent)}.furnace-light{position:absolute;inset:39% 33% 40%;border-radius:50%;box-shadow:0 0 30px #d28b2530;background:#ffa83b10;animation:fire 4s ease-in-out infinite;pointer-events:none}.ritual.is-casting .furnace-light{animation:fire .5s infinite;box-shadow:0 0 80px #ffc46f80}.smoke{position:absolute;width:27%;height:60%;left:38%;top:0;background:radial-gradient(ellipse,#dce3d712,transparent 64%);filter:blur(15px);transform:rotate(18deg);animation:smoke 9s ease-in-out infinite;pointer-events:none}.smoke-two{left:50%;animation-delay:-5s}.bagua-halo{position:absolute;width:62%;aspect-ratio:1;left:19%;top:2%;border:1px solid #d1b17745;border-radius:50%;animation:rotate 120s linear infinite;pointer-events:none}.bagua-halo span{position:absolute;font:20px/1 var(--serif);color:#e2c692;text-shadow:0 2px 4px #000}.bagua-halo span:nth-child(1){left:47%;top:-4%}.bagua-halo span:nth-child(2){right:9%;top:10%}.bagua-halo span:nth-child(3){right:-4%;top:47%}.bagua-halo span:nth-child(4){right:9%;bottom:10%}.bagua-halo span:nth-child(5){left:47%;bottom:-4%}.bagua-halo span:nth-child(6){left:9%;bottom:10%}.bagua-halo span:nth-child(7){left:-4%;top:47%}.bagua-halo span:nth-child(8){left:9%;top:10%}.floating-hex{position:absolute;bottom:3%;left:calc(50% - 55px);width:110px;min-height:92px;padding:10px 18px;background:#101c1cdc;border:1px solid #94785480;backdrop-filter:blur(8px)}#line-stack{display:flex;flex-direction:column-reverse;gap:6px}.yao{height:6px;display:flex;gap:20%;position:relative}.yao:before,.yao:after{content:'';height:4px;flex:1;background:#b9c9bc}.yao.yang{gap:0}.yao.pending:before,.yao.pending:after{height:1px;background:#607369}.yao.moving:before,.yao.moving:after{background:#f4bb65}.yao span{position:absolute;left:calc(100% + 5px);font:8px/1 var(--mono);color:var(--gold)}@keyframes smoke{50%{transform:translate(-20px,-25px) rotate(-12deg);opacity:.35}}@keyframes fire{50%{opacity:.35;transform:scale(1.15)}}
.coin-tray{min-height:95px;display:grid;place-items:center}.coins{display:flex;gap:28px;justify-content:center}.coins>div{display:grid;justify-items:center;gap:8px}.coin{width:48px;height:48px;min-width:48px;display:grid;place-items:center;border-radius:50%;border:1px solid #b89b64;background:radial-gradient(circle,#29382f,#544328);color:#edd2a1;font:22px/1 var(--serif);white-space:nowrap;box-shadow:inset 0 0 0 5px #0b151677}.coin-score{font:11px/1.2 var(--mono);color:var(--muted)}.tossing .coin{animation:toss .5s ease}@keyframes toss{50%{transform:translateY(-18px) rotateY(180deg)}}#cast-status{font-size:12px;line-height:1.9;min-height:46px;color:#bbc9bd;margin:12px auto;max-width:470px}.ritual-actions{display:flex;gap:12px;justify-content:center}.primary,.secondary,.ink-button{display:inline-block;padding:12px 22px;font-size:13px;line-height:1.7}.primary{background:#d5b37c;border:1px solid #d5b37c;color:#19221c}.secondary{border:1px solid #708071;background:transparent;color:#d6dfd3}.tiny{font-size:11px;line-height:1.9;color:var(--muted)}.question-pane{padding:36px 38px;background:#142321;border-left:1px solid var(--line);min-width:0}h2{font-size:32px;line-height:1.5;margin:15px 0}.muted{color:var(--muted);font-size:13px}.question-pane h2{font-size:29px}.question-pane label:not(.check){font-size:12px}.question-pane small{color:var(--muted);margin-left:10px;font-size:10px}fieldset{border:0;margin:22px 0;padding:0}legend{font-size:12px;margin-bottom:10px}.topic-options{display:grid;grid-template-columns:1fr 1fr;gap:8px}.topic-options button{padding:10px;background:transparent;color:#bdc7bc;font-size:12px}.topic-options button.selected{border-color:var(--gold);background:#c6a97110;color:var(--gold)}textarea,input:not([type=radio]):not([type=checkbox]),select{max-width:100%;background:#0e1a18;color:var(--text);border:1px solid #526255;padding:11px 12px;border-radius:0}textarea{width:100%;resize:vertical;margin-top:8px;font-size:13px}.method-options{display:grid;grid-template-columns:1fr;gap:8px}.method-options label{display:grid;grid-template-columns:20px 70px 1fr;gap:8px;align-items:center;padding:8px 12px;border:1px solid var(--line);cursor:pointer}.method-options label:has(:checked){border-color:var(--gold)}.method-options strong{font-weight:400}.method-options span{font-size:10px;color:var(--muted)}input[type=radio],input[type=checkbox]{accent-color:#bd945a}.check{display:flex;align-items:flex-start;gap:8px;font-size:11px}.check input{margin:6px 0 0;flex:none}.edition-note{display:grid;gap:4px;border-top:1px solid var(--line);padding-top:18px;margin-top:24px;font-size:11px;color:var(--muted)}.edition-note strong{color:var(--gold);font-weight:400}.edition-note a{font-size:10px;text-decoration:underline}.disclaimer{font-size:10px;color:var(--muted);margin-top:20px}.manual-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:15px}.manual-grid label{display:grid;gap:5px}.manual-grid select{width:100%;padding:5px}.stalk-group{display:flex;justify-content:center;gap:3px;flex-wrap:wrap;max-width:270px}.stalk-group i{height:32px;width:2px;background:#d8bd82;transform:rotate(9deg)}#stalk-step{font-size:11px;color:var(--gold);margin:7px 0}
.paper{color-scheme:light;background:var(--paper);color:var(--ink);--muted:#726c60;--gold:#8e5d30;--line:#b6ab964f;background-image:radial-gradient(ellipse at 5% 5%,#fffaf0,transparent 65%)}.reading{margin:54px 4%;padding:42px 48px;border-top:4px solid #be985d;scroll-margin-top:20px}.paper-head,.section-top{display:flex;align-items:center;justify-content:space-between;gap:20px}.edition-tag{font:11px var(--serif);letter-spacing:2px;color:#827561}.reading-heading{display:flex;justify-content:space-between;align-items:center;gap:25px;border-bottom:1px solid var(--line);padding:10px 0 25px}.reading-heading h2{font-size:44px}.pair-diagram{display:flex;align-items:center;gap:22px;flex-shrink:0}.pair-diagram>div{text-align:center;font:11px var(--serif)}.pair-diagram p{margin:8px 0 0}.mini-hex{width:44px;display:flex;flex-direction:column-reverse;gap:4px;margin:auto}.mini-line{display:flex;gap:0;height:5px}.mini-line:before,.mini-line:after{content:'';flex:1;background:currentColor}.mini-line.yin{gap:22%}.reading-columns{display:grid;grid-template-columns:1.7fr 1fr;gap:48px;margin:30px 0}.reading-columns aside{border-left:1px solid var(--line);padding-left:30px;min-width:0}.reading-columns aside h3{font-size:24px}.reading-columns aside p{font-size:13px}.rule-box{padding:17px 20px;border-left:2px solid #a27b40;background:#dfd5c345;font-size:12px}.rule-box>span{font-size:10px;color:#866439;letter-spacing:2px}.rule-box p{margin:6px 0}.rule-box a{font-size:10px;text-decoration:underline}.classic-block{padding:24px 0;border-bottom:1px solid var(--line)}.classic-block .label{font-size:11px;color:#8d6337}.classic-block blockquote{font:23px/1.9 var(--serif);margin:12px 0;letter-spacing:1px}.classic-block a,.text-source{font-size:10px;text-decoration:underline;color:#796b54}.editorial{margin-top:28px}.editorial h3{font-size:27px;margin:10px 0}.editorial p{font-size:14px;line-height:2.2}.change-panel{margin-top:24px;border-left:2px solid #9cafa5;padding-left:18px}.change-panel strong{font-size:13px}.question-echo{padding:15px 0;color:#7c613d;font-size:13px}.paper textarea,.paper input:not([type=checkbox]){background:#faf6ec;color:var(--ink);border-color:#b7ad99}.paper label{font-size:12px}.ink-button{background:transparent;border:1px solid #ab997c;color:#5c492d}.bridge{display:block;border-top:1px solid var(--line);padding-top:20px;margin-top:24px;font-size:12px;color:#536a62}.result-actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-top:30px}.result-actions a{font-size:12px}.reading details{border-top:1px solid var(--line);padding:15px 0;font-size:13px}summary{cursor:pointer}#full-text h3{font-size:26px}#full-text p{font:17px/2 var(--serif)}#line-log p{margin:8px 0}#line-log small{display:block;color:#71644e}#glossary{display:grid;grid-template-columns:75px 1fr;gap:12px}#glossary dt{font-family:var(--serif);font-size:18px}#glossary dd{margin:0}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:20px 0}.related-grid button{background:transparent;color:var(--ink);border:1px solid #b5a993;padding:16px}.related-grid p{font-size:11px}.atlas{padding:40px 6% 65px}.search-label{display:grid;gap:6px;font-size:10px;color:var(--muted)}.search-label input{width:200px;font-size:12px}#hexagram-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:10px;margin-top:26px}.hex-tile{background:transparent;color:#d7dccc;border:1px solid #ffffff1c;padding:12px 8px;min-width:0;transition:background .2s,transform .2s}.hex-tile:hover{background:#344238;transform:translateY(-3px)}.hex-tile small{display:block;text-align:left;color:#9da997;font:9px var(--mono)}.hex-tile .mini-hex{margin-block:12px}.hex-tile>span{font:16px var(--serif)}.journal{margin:0 4%;padding:35px 48px}.journal-item{border-top:1px solid var(--line);padding:16px 0;display:grid;grid-template-columns:1fr auto;gap:8px}.journal-item p{grid-column:1/-1;margin:0;font-size:12px;white-space:pre-wrap}.journal-item button{font-size:11px;padding:5px 10px;background:transparent;color:var(--ink);border-color:#b5a993}.journal-item .journal-open{font-family:var(--serif);font-size:18px;text-align:left;border:0;padding:0}.next-chapter{padding:60px 6%;display:flex;gap:35px;justify-content:space-between;align-items:center}.next-chapter p:not(.eyebrow){color:var(--muted);font-size:13px}.next-chapter .button{flex-shrink:0}footer{font-size:11px;color:var(--muted);border-top:1px solid var(--line);border-bottom:0}dialog{width:min(680px,calc(100% - 28px));max-height:90vh;padding:28px;background:var(--paper);color:var(--ink);border:1px solid #ad926c;overflow:auto}dialog::backdrop{background:#020909c9;backdrop-filter:blur(7px)}.dialog-top{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#816c49}.dialog-top button{font-size:27px;background:none;color:var(--ink);padding:0 12px;border-color:#baab92}#atlas-symbol{margin-top:25px;width:60px}#atlas-text .classic-block blockquote{font-size:18px}#atlas-text p{font:15px/2 var(--serif)}#atlas-hd{display:inline-block;margin-top:24px;font-size:12px;text-decoration:underline}.skip{position:absolute;left:-9999px}.skip:focus{left:15px;top:10px;z-index:99;background:var(--gold);color:#000;padding:12px}.no-motion *,.no-motion *:before,.no-motion *:after{animation:none!important;scroll-behavior:auto!important;transition:none!important}
@media(max-width:1000px){h1{font-size:62px}h1 span{display:block;margin:15px 0 0;font-size:23px}.game-layout{grid-template-columns:1fr 1fr}.question-pane{padding:28px 24px}.reading{padding:30px}.reading-columns{gap:25px;grid-template-columns:1.4fr 1fr}#hexagram-grid{grid-template-columns:repeat(6,1fr)}.method-options label{grid-template-columns:18px 60px 1fr}.ritual{padding-inline:18px}.furnace-stage{margin-inline:-18px}}
@media(max-width:720px){header{flex-wrap:wrap;padding:16px 5%;gap:14px}.wordmark span{font-size:10px;margin-left:8px}header nav{order:3;width:100%;justify-content:space-between;gap:10px}header .quiet{font-size:10px;padding:6px}.intro{padding:32px 6%}.intro h1{font-size:54px}.intro h1 span{font-size:20px;letter-spacing:2px}.intro-seal{font-size:8px;letter-spacing:1px}.taiji{width:56px;height:56px}.taiji:before,.taiji:after{border-width:10px}.game-layout{grid-template-columns:1fr}.question-pane{border-left:0;border-top:1px solid var(--line);order:-1;padding:25px}.question-pane h2{font-size:27px}.ritual{padding-top:24px}.furnace-stage{max-height:430px}.method-options{grid-template-columns:repeat(3,1fr);gap:6px}.method-options label{display:flex;flex-wrap:wrap;padding:10px 7px;gap:5px}.method-options strong{font-size:12px}.method-options span{font-size:9px;line-height:1.7}.reading{margin:28px 4%;padding:25px 20px}.reading-heading{align-items:flex-start;flex-wrap:wrap;gap:15px}.reading-heading h2{font-size:33px}.paper-head{align-items:flex-start}.edition-tag{font-size:9px;flex-shrink:0}.reading-columns{grid-template-columns:1fr;gap:25px}.reading-columns aside{padding-left:0;padding-top:22px;border-left:0;border-top:1px solid var(--line)}.classic-block blockquote{font-size:21px}.related-grid{gap:7px}.related-grid button{padding:12px 6px}.result-actions{gap:8px}.ink-button{padding:10px 14px;font-size:12px}#hexagram-grid{grid-template-columns:repeat(4,1fr);gap:8px}.atlas{padding-top:20px}.atlas .section-top{align-items:flex-start;flex-wrap:wrap}.search-label{width:100%}.search-label input{width:100%}.section-top h2{font-size:28px}.journal{padding:25px 20px}.journal .section-top{flex-wrap:wrap;gap:8px}.next-chapter{flex-direction:column;align-items:flex-start;padding-block:35px}footer{flex-wrap:wrap;gap:12px}.pair-diagram{gap:16px}.pair-diagram .mini-hex{width:38px}.tiny{font-size:11px}.question-pane small{display:block;margin:0}#glossary{grid-template-columns:60px 1fr}.journal-item{grid-template-columns:1fr}.journal-item button{justify-self:start}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}
/* Pseudo elements need the same sizing contract as their host. */
.taiji:before,.taiji:after{box-sizing:border-box}.taiji:before{top:0}.taiji:after{top:50%}

.line-note{padding:12px 16px;border-left:2px solid #a58858;color:#6c604d;font-size:15px;line-height:1.9;background:#e9e1d34d}.classic-block .line-note{margin-top:18px}