/* Exact-source Earth Science「脈絡整合」spread canvas. Spatial layout stays fixed on mobile; the viewport pans/zooms instead. */
.v4ref-page-head{align-items:flex-start}.v4ref-page-head p{max-width:760px}.v4ref-modebar{display:flex;justify-content:space-between;gap:12px;align-items:center;margin:13px 0 8px;padding:6px 7px;border:1px solid #dedde2;border-radius:11px;background:#fff}.v4ref-modebar-generic{width:max-content;margin-bottom:12px}.v4ref-source-switch,.v4ref-study-switch{display:flex;gap:4px}.v4ref-modebar button{border:0;background:transparent;border-radius:8px;padding:7px 10px;font-size:11px;font-weight:800;color:#70737b}.v4ref-modebar button.active{background:#626fc7;color:#fff;box-shadow:0 2px 7px rgba(73,83,160,.2)}
.v4ref-chapter-nav{display:flex;gap:7px;overflow-x:auto;padding:4px 1px 11px;scrollbar-width:thin}.v4ref-chapter-nav button{flex:0 0 auto;min-width:185px;display:grid;grid-template-columns:29px minmax(0,1fr) auto;align-items:center;gap:7px;text-align:left;border:1px solid #dedde3;background:#fff;border-radius:10px;padding:8px 9px}.v4ref-chapter-nav button>b{width:29px;height:29px;display:grid;place-items:center;border-radius:50%;background:#e8ebf5;color:#56617f;font-size:12px}.v4ref-chapter-nav button>span{font-size:11px;font-weight:850;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.v4ref-chapter-nav button>small{font-size:9px;color:#8e919a}.v4ref-chapter-nav button.active{border-color:#6975c6;background:#f7f7ff}.v4ref-chapter-nav button.active>b{background:#6472c8;color:white}
.v4ref-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:4px 0 8px;color:#777870;font-size:10px}.v4ref-toolbar>div{display:flex;gap:4px}.v4ref-toolbar button{border:1px solid #d8d7d1;background:#fff;border-radius:7px;padding:5px 8px;min-width:32px;font-size:10px;font-weight:800;color:#5e6268}.v4ref-footnote{display:flex;justify-content:space-between;gap:8px;margin-top:7px;font-size:9px;color:#85847f}
.v4ref-viewport{height:min(74vh,820px);min-height:530px;overflow:auto;position:relative;border:1px solid #cbc8c0;border-radius:12px;background:linear-gradient(145deg,#d8d2c5,#c6beb0);box-shadow:inset 0 1px 8px rgba(63,53,41,.12);overscroll-behavior:contain;touch-action:none;cursor:grab}.v4ref-viewport.is-panning{cursor:grabbing}.v4ref-stage{position:relative;flex:0 0 auto}.v4ref-canvas{position:absolute;left:0;top:0;transform-origin:0 0;font-family:"Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;color:#343637;isolation:isolate}.v4ref-paper{position:absolute;top:20px;width:910px;height:1270px;background:#fffdf5;border:1px solid #d9d3c5;box-shadow:0 7px 23px rgba(55,46,35,.15);z-index:-5}.v4ref-paper:after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 15% 12%,rgba(172,142,91,.04),transparent 35%),linear-gradient(rgba(255,255,255,.5),rgba(247,242,229,.15));pointer-events:none}.v4ref-paper-left{left:25px;border-radius:3px 7px 7px 3px}.v4ref-paper-right{left:965px;border-radius:7px 3px 3px 7px}.v4ref-gutter{position:absolute;left:935px;top:35px;width:30px;height:1240px;background:linear-gradient(90deg,rgba(65,55,42,.08),rgba(255,255,255,.68),rgba(65,55,42,.08));z-index:-3}
.v4ref-source-header{position:absolute;left:58px;top:48px;width:820px;height:102px;display:flex;align-items:center;padding:13px 34px 9px 20px;background:#edc58c;clip-path:polygon(0 2%,97% 0,100% 5%,99.5% 94%,0 100%);z-index:5}.v4ref-source-header:after{content:"";position:absolute;right:14px;top:12px;bottom:11px;width:10px;background:radial-gradient(circle,#fffdf5 3.6px,transparent 4px) center top/10px 15px repeat-y}.v4ref-source-header svg{width:122px;height:63px;align-self:flex-end;margin-right:-15px}.v4ref-title-mini{font-size:10px;font-weight:850;line-height:1.05;color:#edf3f0;text-align:right;z-index:2;margin-right:-4px}.v4ref-source-header>b{width:65px;height:65px;display:grid;place-items:center;border-radius:50%;background:#607fb5;color:#fff;font-size:29px;z-index:1}.v4ref-source-header h3{font-size:32px;letter-spacing:.045em;margin:0 0 0 18px;color:#37322e;font-weight:850}.v4ref-right-page-label{position:absolute;right:77px;top:50px;font-size:14px;font-weight:800;color:#404246;letter-spacing:.04em}.v4ref-page-footer{position:absolute;bottom:39px;color:#77736c;font-size:24px;font-weight:450;text-decoration:underline;text-underline-offset:5px}.v4ref-page-footer.left{left:68px}.v4ref-page-footer.right{right:72px}
.v4ref-global-lines{position:absolute;inset:0;width:100%;height:100%;z-index:-1;pointer-events:none}.v4ref-global-lines path{fill:none;stroke-width:5;opacity:.45;stroke-linecap:round;stroke-linejoin:round;marker-end:url(#v4ref-global-arr)}
.v4ref-zone{position:absolute;padding:44px 13px 12px 30px;background:transparent;--zone:#6a84ba;z-index:1}.v4ref-zone:before{content:"";position:absolute;left:20px;top:35px;bottom:15px;width:5px;border-radius:5px;background:var(--zone);opacity:.96}.v4ref-ribbon{position:absolute;left:2px;top:0;min-width:170px;width:max-content;max-width:70%;padding:8px 19px 7px;border-radius:10px 10px 10px 2px;background:var(--zone);color:white;font-size:18px;font-weight:900;letter-spacing:.03em;box-shadow:0 1px 0 rgba(0,0,0,.08)}.v4ref-zone-diagram{position:absolute;right:8px;top:48px;width:190px;height:110px;color:color-mix(in srgb,var(--zone) 86%,#41474e);opacity:.9}.v4ref-diagram-svg{display:block;width:100%;height:100%;overflow:visible}.v4ref-zone-items{height:100%;display:grid;grid-template-columns:repeat(var(--cols),minmax(0,1fr));grid-auto-flow:column;grid-template-rows:repeat(ceil(var(--item-count,10)/var(--cols)),auto);column-gap:18px;row-gap:1px;align-content:start;padding-right:198px}.v4ref-zone-items:has(.v4ref-blank-item:nth-child(n+13)){padding-right:148px}.v4ref-zone-items:has(.v4ref-blank-item:nth-child(n+23)){padding-right:0;padding-top:112px}.v4ref-blank-item{position:relative;min-height:27px;padding:3px 2px 3px 16px;font-size:12px;line-height:1.42;color:#404244}.v4ref-blank-item:before{content:"";position:absolute;left:-10px;top:11px;width:19px;height:2px;background:var(--zone);opacity:.84}.v4ref-junction{position:absolute;left:-16px;top:6px;width:11px;height:11px;border:2px solid #555a5d;border-radius:50%;background:#fffdf5;z-index:3}.v4ref-prompt{font-weight:620}.v4ref-number{font-size:8px;color:#6c6d70;vertical-align:top;margin:0 3px 0 2px;white-space:nowrap}.v4ref-field-sep{font-size:9px;color:#8b8b86}.v4ref-input-wrap{display:inline-flex;align-items:center;min-width:46px;vertical-align:middle;position:relative;margin:0 2px}.v4ref-input{width:92px;max-width:140px;height:22px;padding:1px 3px;border:0;border-bottom:1.7px solid #5b5e62;border-radius:0;background:transparent;outline:0;text-align:center;font:700 12px/18px inherit;color:#354b65;touch-action:manipulation}.v4ref-input:focus{border-bottom-color:var(--zone);background:color-mix(in srgb,var(--zone) 7%,transparent)}.v4ref-input-wrap i{font-style:normal;font-size:8px;margin-left:2px;min-width:8px}.v4ref-input-wrap.is-ok .v4ref-input{border-bottom-color:#48915a;color:#327144}.v4ref-input-wrap.is-ok i{color:#3d8b50}.v4ref-input-wrap.is-wrong .v4ref-input{border-bottom-color:#c15b55;color:#8e3d39}.v4ref-input-wrap.is-wrong i{color:#b44d47}.v4ref-learn-answer{display:inline-block;min-width:72px;margin:0 3px;padding:0 5px 1px;border-bottom:1.7px solid #5c6062;color:#325f91;font-weight:900}.v4ref-review-line{display:block;margin:2px 0 0 2px;font-size:8px;color:#777}.v4ref-review-line.good{color:#397d4a}.v4ref-review-line.bad{color:#a04742}.v4ref-blank-item.is-complete>.v4ref-junction{border-color:#448a56;background:#e9f5ec}
/* Source-style local branching variations, deliberately asymmetric like the photographed spreads. */
.v4ref-zone:nth-of-type(even) .v4ref-zone-diagram{right:26px;transform:rotate(-1.5deg)}.v4ref-zone:nth-of-type(odd) .v4ref-ribbon{transform:rotate(.25deg)}.v4ref-zone[data-v4ref-zone="humidity"] .v4ref-zone-diagram,.v4ref-zone[data-v4ref-zone="geologic-time"] .v4ref-zone-diagram{width:260px;height:135px;right:12px}.v4ref-zone[data-v4ref-zone="motion"] .v4ref-zone-diagram{width:250px;height:145px;right:22px;top:48px}.v4ref-zone[data-v4ref-zone="motion"] .v4ref-zone-items{padding-right:0;padding-top:145px}.v4ref-zone[data-v4ref-zone="typhoon-enso"] .v4ref-zone-diagram,.v4ref-zone[data-v4ref-zone="plate"] .v4ref-zone-diagram{width:260px;height:140px}.v4ref-zone[data-v4ref-zone="climate-change"] .v4ref-zone-diagram,.v4ref-zone[data-v4ref-zone="ocean-motion"] .v4ref-zone-diagram{width:240px;height:135px}.v4ref-zone[data-v4ref-zone="star-properties"] .v4ref-zone-diagram{width:250px;height:130px}.v4ref-zone[data-v4ref-zone="latitude-sky"] .v4ref-zone-diagram{width:260px;height:145px}
@media(max-width:900px){.v4ref-page-head p{display:none}.v4ref-modebar{align-items:stretch}.v4ref-chapter-nav button{min-width:164px}.v4ref-viewport{height:68vh;min-height:480px}.v4ref-toolbar>span{max-width:48%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.v4ref-footnote{display:block}.v4ref-footnote span{display:block;margin-top:2px}}
@media(max-width:560px){.v4ref-modebar{display:block}.v4ref-study-switch{margin-top:5px}.v4ref-modebar button{padding:6px 8px;font-size:10px}.v4ref-chapter-nav button{min-width:150px}.v4ref-toolbar button{padding:5px 6px}.v4ref-viewport{height:66vh;min-height:430px;border-radius:9px}.v4ref-toolbar{font-size:9px}.v4ref-source-switch,.v4ref-study-switch{overflow-x:auto}}