/* Tutorial reading layout; shared navigation, model controls and billing are untouched. */
.tutorial-page{--guide-ink:#252824;--guide-paper:#f4f5f3;--guide-line:#dde1da;--guide-muted:#60665d;--guide-green:#345c48;--guide-green-soft:#edf3ee;--guide-anchor:112px;font-family:"PingFang SC","Microsoft YaHei",sans-serif}
.tutorial-page [hidden]{display:none!important}
.tutorial-main{padding-top:38px;padding-bottom:70px}
.tutorial-intro{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:28px}
.tutorial-intro h1{font-size:34px;line-height:1.45;letter-spacing:-.025em;font-weight:600;color:var(--guide-ink)}
.tutorial-intro p{max-width:42em;margin-top:10px;font-size:15px;line-height:1.9;color:var(--guide-muted)}
.tutorial-meta{flex-shrink:0;font-size:13px;color:var(--guide-muted);line-height:1.9;text-align:right}
.tutorial-start{scroll-margin-top:14px;padding:25px 0 28px;margin-bottom:40px;border-block:1px solid var(--guide-line)}
.tutorial-start h2,.tutorial-support h2{font-size:23px;line-height:1.6;font-weight:600;margin:0 0 8px;color:var(--guide-ink)}
.tutorial-start>p,.tutorial-support>p{font-size:15px;line-height:1.9;color:var(--guide-muted)}
.tutorial-choices{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px;margin-top:20px}
.tutorial-choices a{display:flex;flex-direction:column;gap:9px;padding:17px 16px 18px;border:1px solid var(--guide-line);border-radius:10px;color:var(--guide-ink);background:#fff;text-decoration:none!important}
.tutorial-choices a:hover{border-color:#94a698;background:var(--guide-paper)}
.tutorial-choices .tutorial-choice-kind{font-size:12px;color:var(--guide-green);line-height:1.6;font-weight:600}
.tutorial-choices strong{font-size:16px;line-height:1.65;font-weight:600}
.tutorial-choices span:not(.tutorial-choice-kind){font-size:13px;line-height:1.85;color:var(--guide-muted)}
.tutorial-basics{margin-top:22px;border-top:1px solid var(--guide-line)}
.tutorial-basics summary{padding:15px 0;min-height:44px;cursor:pointer;font-size:14px;line-height:1.8;font-weight:500}
.tutorial-first-notes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px;padding:0 0 12px}
.tutorial-first-notes h3{font-size:14px;line-height:1.8;margin-bottom:5px;font-weight:600}
.tutorial-first-notes p{font-size:13px;line-height:1.9;color:var(--guide-muted)}
.tutorial-start-tip{font-size:13px;line-height:1.9;color:var(--guide-muted)}
.tutorial-page :is(.tutorial-start-tip,.tutorial-prep-link,.tutorial-support,.tutorial-extra) a:not(.button){text-decoration:underline;text-underline-offset:4px}
.tutorial-layout-v2{display:grid;grid-template-columns:212px minmax(0,1fr);gap:40px;align-items:start}
.tutorial-index{position:sticky;top:108px;max-height:calc(100dvh - 130px);overflow-y:auto;overscroll-behavior:contain;padding-right:6px;scrollbar-width:thin}
.tutorial-index>p{font-size:12px;color:var(--guide-muted);margin:0 0 12px 10px}
.tutorial-index nav{display:grid;gap:4px}
.tutorial-index a{display:flex;align-items:center;justify-content:space-between;gap:10px;min-height:44px;padding:10px 11px;border:1px solid transparent;border-radius:7px;font-size:14px;line-height:1.7;color:#545a51}
.tutorial-index a span{font-size:12px;color:#70766b;white-space:nowrap}
.tutorial-index a:hover{background:var(--guide-paper)}
.tutorial-index a[aria-current=true]{color:#fff;background:var(--guide-ink)}
.tutorial-index a[aria-current=true] span{color:#e2e6de}
.tutorial-mobile-select{display:none}
.tutorial-reading-nav{margin-top:20px;padding-top:18px;border-top:1px solid var(--guide-line)}
.tutorial-reading-nav p{display:flex;justify-content:space-between;font-size:12px;line-height:1.8;color:var(--guide-muted);margin:0 10px 8px}
.tutorial-reading-nav a{justify-content:flex-start;align-items:flex-start;font-size:13px;padding:8px 10px;gap:9px;min-height:40px}
.tutorial-reading-nav a span{font-size:13px;white-space:normal;color:inherit}
.tutorial-reading-nav .tutorial-nav-number{font-size:12px;flex:0 0 18px;line-height:1.85;color:#70766b}
.tutorial-reading-nav a[aria-current=location]{background:var(--guide-green-soft);color:var(--guide-green);border-left-color:var(--guide-green)}
.tutorial-index-tools{border-top:1px solid var(--guide-line);margin-top:18px;padding-top:5px}
.tutorial-index-tools summary{cursor:pointer;padding:12px 10px;min-height:44px;font-size:13px;line-height:1.8}
.tutorial-index-extras a{font-size:13px;min-height:44px}
.tutorial-content,.tutorial-article{min-width:0}
.tutorial-article,.tutorial-step,.tutorial-step-index,.tutorial-support{scroll-margin-top:14px}
.tutorial-article:focus{outline:none}
.tutorial-chapter-head{padding-bottom:26px;border-bottom:1px solid var(--guide-line)}
.tutorial-title-row{display:flex;justify-content:space-between;align-items:center;gap:18px}
.tutorial-title-row h2{font-size:28px;line-height:1.6;font-weight:600}
.tutorial-title-row .button{font-size:13px;min-height:44px;padding:10px 16px;flex-shrink:0}
.tutorial-tagline{font-size:15px;line-height:1.9;color:var(--guide-muted);margin-top:5px}
.tutorial-brief{display:grid;grid-template-columns:1.4fr 1fr;gap:28px;margin:22px 0 0;padding:20px 22px;background:var(--guide-paper);border-radius:9px}
.tutorial-brief dt{font-size:13px;font-weight:600;margin-bottom:6px;color:var(--guide-ink)}
.tutorial-brief dd{font-size:14px;line-height:1.9;color:var(--guide-muted);margin:0}
.tutorial-route{margin-top:20px;padding:17px 20px;border-left:3px solid #7b9a86;background:var(--guide-green-soft);border-radius:0 8px 8px 0}
.tutorial-route h3{font-size:16px;line-height:1.75;font-weight:600;margin-bottom:7px}
.tutorial-route p{font-size:14px;line-height:1.9;color:#3e5748}
.tutorial-route-branch{padding-top:10px;margin-top:10px;border-top:1px solid #d3e0d6}
.tutorial-prep-link{font-size:13px;line-height:1.8;margin-top:16px}
.tutorial-step-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 20px;margin-top:20px}
.tutorial-step-index a{display:flex;align-items:center;min-height:44px;padding:10px 0;font-size:13px;line-height:1.8;color:#555d51;border-bottom:1px solid var(--guide-line)}
.tutorial-step-index a:hover{color:var(--guide-green)}
.tutorial-steps{list-style:none;padding:0;margin:0}
.tutorial-step{padding:32px 0 26px;border-bottom:1px solid var(--guide-line)}
.tutorial-step-heading{display:flex;align-items:flex-start;gap:13px;margin-bottom:21px}
.tutorial-step-number{display:grid;place-items:center;width:34px;height:34px;flex-shrink:0;border-radius:9px;background:var(--guide-ink);color:#fff;font-size:14px;line-height:1}
.tutorial-step h3{font-size:20px;line-height:1.7;font-weight:600;color:var(--guide-ink)}
.tutorial-step-grid{display:grid;grid-template-columns:1fr;gap:26px;align-items:start}
.tutorial-step-compact{grid-template-columns:minmax(0,1fr) 320px;gap:32px}
.tutorial-step-copy{min-width:0;max-width:52em;font-size:15px}
.tutorial-where{font-size:13px!important;color:var(--guide-muted)!important;line-height:1.8!important;margin:0 0 16px!important}
.tutorial-step-copy h4{font-size:14px;font-weight:600;margin:0 0 8px;color:var(--guide-ink)}
.tutorial-step-copy p{line-height:1.95;overflow-wrap:anywhere;color:#555c51;margin:0}
.tutorial-actions{list-style:decimal;padding:0 0 0 23px;margin:0}
.tutorial-actions>li{padding:0 0 10px 4px;line-height:1.95;color:#555c51;overflow-wrap:anywhere}
.tutorial-actions>li:last-child{padding-bottom:0}
.tutorial-actions>li::marker{font-weight:600;color:var(--guide-green)}
.tutorial-effect{margin-top:20px;padding:15px 17px;background:var(--guide-green-soft);border-left:3px solid #7b9a86;border-radius:0 8px 8px 0}
.tutorial-effect h4{color:#30523e}
.tutorial-effect p{color:#3e5748}
.tutorial-example{margin-top:18px;padding:15px 17px;border:1px dashed #c0c8ba;border-radius:8px}
.tutorial-example p{font-size:14px}
.tutorial-tip{margin-top:18px!important;font-size:13px;color:#697060!important}
.tutorial-tip strong{font-weight:600;color:#535b4c}
.tutorial-availability{font-size:13px!important;line-height:1.9!important;padding:11px 14px;border-left:3px solid #af8f56;background:#faf6ec;border-radius:0 7px 7px 0;margin-bottom:16px!important}
.tutorial-shots{display:grid;grid-template-columns:1fr;gap:28px;min-width:0;padding-top:4px}
.tutorial-shots-pair{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.tutorial-shot{margin:0;min-width:0}
.tutorial-shot h4{font-size:15px;line-height:1.8;margin-bottom:7px;font-weight:600}
.tutorial-source{font-size:12px;line-height:1.8;color:#68705f;margin:0 0 11px}
.tutorial-picture{display:block;width:min(100%,var(--shot-width));padding:0;background:#fff;border:1px solid var(--guide-line);border-radius:9px;overflow:hidden;cursor:zoom-in;text-align:left}
.tutorial-picture img{display:block;width:100%;height:auto;aspect-ratio:auto}
.tutorial-shot figcaption{max-width:58em;font-size:13px;line-height:1.9;color:var(--guide-muted);margin-top:10px}
.tutorial-step-footer{display:flex;justify-content:space-between;align-items:center;gap:24px;padding-top:22px;margin-top:26px;border-top:1px dashed var(--guide-line)}
.tutorial-step-footer a{display:flex;align-items:center;min-height:44px;padding:8px 0;font-size:13px;line-height:1.8;color:#596151;max-width:70%}
.tutorial-step-footer a:last-child{color:var(--guide-green);text-align:right;justify-content:flex-end}
.tutorial-end{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px;background:var(--guide-paper);border-radius:9px;margin-top:28px}
.tutorial-end p{font-size:14px;line-height:1.9;max-width:36em}
.tutorial-end .button{font-size:13px;min-height:44px;flex-shrink:0}
.tutorial-support{margin-top:36px;padding:25px;border:1px solid var(--guide-line);border-radius:10px}
.tutorial-save-list{margin:16px 0 0}
.tutorial-save-list>div{padding:16px 0;border-top:1px solid var(--guide-line)}
.tutorial-save-list dt{font-size:14px;font-weight:600;margin-bottom:7px}
.tutorial-save-list dd{font-size:15px;line-height:1.95;margin:0;color:var(--guide-muted)}
.tutorial-support details{border-top:1px solid var(--guide-line)}
.tutorial-support summary,.tutorial-extra summary{cursor:pointer;min-height:44px;padding:16px 0;font-size:14px;line-height:1.9;font-weight:500;overflow-wrap:anywhere}
.tutorial-support details p{font-size:14px;line-height:1.95;padding-bottom:16px;color:var(--guide-muted)}
.tutorial-extra{margin-top:18px;padding:0 14px;border:1px solid var(--guide-line);border-radius:8px}
.tutorial-extra[open]{padding-bottom:16px}
.tutorial-extra p{font-size:14px;margin-top:12px}
.tutorial-extra .tutorial-actions{font-size:14px}
.tutorial-material-pair{margin-top:24px;padding-top:20px;border-top:1px solid var(--guide-line)}
.tutorial-material-pair h3{font-size:18px;line-height:1.8;margin-bottom:14px;font-weight:600}
.tutorial-compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.tutorial-compare-grid figure{margin:0;min-width:0}
.tutorial-material-visual{display:block;width:100%;height:auto;border:1px solid var(--guide-line);border-radius:9px}
.tutorial-compare-grid figcaption{margin-top:12px}
.tutorial-compare-grid strong{font-size:14px;line-height:1.8;display:block}
.tutorial-compare-grid p{font-size:14px;line-height:1.95;color:var(--guide-muted);margin-top:6px}
.tutorial-trial-task{margin-top:20px;padding:20px;background:var(--guide-paper);border-radius:8px}
.tutorial-trial-task h3{font-size:16px;line-height:1.8;margin-bottom:7px}
.tutorial-trial-task p{font-size:15px;line-height:1.95;margin-bottom:16px;color:var(--guide-muted)}
.tutorial-trial-task .button{min-height:44px;font-size:13px}
.tutorial-trial-checklist{border:1px solid var(--guide-line);border-radius:8px;min-width:0;margin:24px 0 14px;padding:8px 18px 12px}
.tutorial-trial-checklist legend{font-size:14px;line-height:1.8;font-weight:600;padding:0 5px}
.tutorial-trial-checklist label{display:flex;align-items:flex-start;gap:12px;min-height:44px;padding:14px 0;font-size:15px;line-height:1.9}
.tutorial-trial-checklist label+label{border-top:1px solid #e9ece5}
.tutorial-trial-checklist input{width:19px;height:19px;flex-shrink:0;margin-top:5px;accent-color:var(--guide-green)}
.tutorial-trial-local{font-size:13px!important}
.tutorial-trial-notes{display:block;font-size:14px;margin:8px 0}
#tutorial-trial-notes{display:block;width:100%;min-height:132px;box-sizing:border-box;resize:vertical;padding:13px;border:1px solid var(--guide-line);border-radius:8px;font-size:16px;line-height:1.8;margin-bottom:16px}
.tutorial-note{max-width:64em;font-size:13px;line-height:1.95;margin-top:30px!important;color:var(--guide-muted)}
.tutorial-reading-bar{display:none}
.tutorial-zoom{border:0;border-radius:12px;padding:18px;width:min(1460px,calc(100vw - 28px));max-height:calc(100dvh - 28px);overflow:auto;overscroll-behavior:contain;background:#fff;color:var(--guide-ink)}
.tutorial-zoom::backdrop{background:#202020a8}
.tutorial-zoom-head{position:sticky;top:-18px;left:0;z-index:1;background:#fff;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:4px 0 14px}
.tutorial-zoom h2{font-size:17px;line-height:1.7;font-weight:600}
.tutorial-zoom-close{min-height:44px;padding:10px 18px;background:#eef0eb;border-radius:8px;color:var(--guide-ink);white-space:nowrap}
.tutorial-zoom img{display:block;width:auto;max-width:none;height:auto;margin-inline:auto}
.tutorial-zoom p{font-size:13px;line-height:1.9;margin-top:12px;color:var(--guide-muted)}
.tutorial-page :is(.tutorial-index a,.tutorial-choices a,.tutorial-step-index a,.tutorial-picture,.tutorial-zoom-close,.tutorial-step-footer a,.tutorial-support a,.tutorial-extra a,summary,input,textarea,.tutorial-reading-bar a):focus-visible{outline:2px solid var(--guide-green);outline-offset:3px}
@media(max-width:1150px){.tutorial-choices{grid-template-columns:repeat(3,minmax(0,1fr))}.tutorial-layout-v2{grid-template-columns:188px minmax(0,1fr);gap:28px}.tutorial-step-compact{grid-template-columns:1fr}.tutorial-shots-pair{grid-template-columns:1fr}.tutorial-intro h1{font-size:30px}}
@media(max-width:800px){
 .tutorial-page{--guide-anchor:110px}.tutorial-main{padding-top:28px;padding-bottom:120px}.tutorial-intro{display:block;margin-bottom:24px}.tutorial-intro h1{font-size:28px}.tutorial-intro p{font-size:14px}.tutorial-meta{font-size:12px;margin-top:10px;text-align:left}.tutorial-meta br{display:none}
 .tutorial-start{padding-block:22px;margin-bottom:28px}.tutorial-start h2,.tutorial-support h2{font-size:21px}.tutorial-start>p{font-size:14px}.tutorial-choices{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.tutorial-choices a{padding:14px}.tutorial-choices strong{font-size:15px}.tutorial-first-notes{grid-template-columns:1fr;gap:18px}.tutorial-first-notes p{font-size:14px}.tutorial-basics{margin-top:18px}
 .tutorial-layout-v2{display:block}.tutorial-index{position:static;max-height:none;overflow:visible;margin-bottom:26px;padding-right:0}.tutorial-index>p{margin-left:0}.tutorial-index>nav{display:flex;flex-wrap:wrap;gap:6px}.tutorial-index>nav a{border-color:var(--guide-line);padding:9px 12px}.tutorial-enhanced .tutorial-index>nav{display:none}.tutorial-enhanced .tutorial-mobile-select{display:grid;gap:7px}.tutorial-mobile-select label{font-size:13px;line-height:1.8}.tutorial-mobile-select select{width:100%;height:46px;font-size:16px}
 .tutorial-reading-nav{display:none}.tutorial-index-tools{margin-top:12px;padding-top:0;border:0}.tutorial-index-tools summary{padding-inline:0}.tutorial-index-extras{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.tutorial-index-extras a{border-color:var(--guide-line)}
 .tutorial-title-row{align-items:flex-start}.tutorial-title-row h2{font-size:24px}.tutorial-title-row .button{font-size:12px;padding-inline:12px}.tutorial-brief{grid-template-columns:1fr;padding:18px;gap:18px}.tutorial-step-index{grid-template-columns:1fr;gap:0}.tutorial-step-index a{font-size:14px}.tutorial-step{padding-block:27px}.tutorial-step h3{font-size:19px}.tutorial-step-heading{gap:11px;margin-bottom:18px}.tutorial-step-number{width:32px;height:32px}.tutorial-step-grid{gap:22px}.tutorial-route{padding:16px}.tutorial-step-copy{font-size:15px}.tutorial-actions>li{line-height:1.95}.tutorial-effect{padding:14px 15px}.tutorial-shots{gap:25px}.tutorial-shot h4{font-size:15px}.tutorial-source{font-size:12px}.tutorial-shot figcaption{font-size:13px}
 .tutorial-step-footer{gap:20px;align-items:flex-start}.tutorial-step-footer a{max-width:70%;font-size:13px}.tutorial-step-footer a:first-child{flex-shrink:0}.tutorial-end{flex-wrap:wrap;padding:18px}.tutorial-support{padding:20px;margin-top:28px}.tutorial-save-list dd{font-size:14px}.tutorial-compare-grid{gap:20px}.tutorial-trial-task{padding:17px}.tutorial-trial-task p{font-size:14px}
 .tutorial-reading-bar{position:fixed;left:16px;right:16px;bottom:calc(12px + env(safe-area-inset-bottom));z-index:20;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 14px;background:#fff;border:1px solid var(--guide-line);border-radius:10px;box-shadow:0 3px 12px #25282412}.tutorial-reading-bar span{font-size:13px;line-height:1.8;min-width:0}.tutorial-reading-bar a{display:flex;align-items:center;min-height:44px;white-space:nowrap;font-size:13px;color:var(--guide-green);text-decoration:underline;text-underline-offset:3px}
 .tutorial-zoom{padding:12px}.tutorial-zoom-head{top:-12px}.tutorial-zoom h2{font-size:15px}
}
@media(max-width:520px){.tutorial-choices{grid-template-columns:1fr}.tutorial-choices a{display:grid;grid-template-columns:75px minmax(0,1fr);gap:5px 12px;padding:14px}.tutorial-choices .tutorial-choice-kind{grid-row:1 / 3;align-self:start;padding-top:2px;font-size:12px}.tutorial-choices strong{font-size:15px;line-height:1.7}.tutorial-choices span:not(.tutorial-choice-kind){font-size:13px;line-height:1.85}.tutorial-compare-grid{grid-template-columns:1fr;gap:24px}.tutorial-title-row{flex-wrap:wrap}.tutorial-support{padding:18px}.tutorial-trial-checklist{padding-inline:12px}.tutorial-trial-checklist legend{font-size:13px}.tutorial-trial-checklist label{font-size:14px}.tutorial-index-extras{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){.tutorial-page *{scroll-behavior:auto!important}}
@media print{.tutorial-page .site-header,.tutorial-page .site-footer,.tutorial-index,.tutorial-step-index,.tutorial-title-row .button,.tutorial-end,.tutorial-zoom,.tutorial-reading-bar,.tutorial-step-footer{display:none!important}.tutorial-page .tutorial-article[hidden]{display:block!important}.tutorial-layout-v2{display:block}.tutorial-page .shell{width:100%;max-width:none}.tutorial-step-grid,.tutorial-step-compact{grid-template-columns:1fr}.tutorial-shots-pair{grid-template-columns:repeat(2,minmax(0,1fr))}.tutorial-step-heading,.tutorial-effect{break-inside:avoid}.tutorial-choices{grid-template-columns:repeat(3,minmax(0,1fr))}.tutorial-basics:not([open])>*:not(summary){display:block!important}.tutorial-support{break-before:auto}.tutorial-main{padding:0}}
.tutorial-footer-next{display:grid;justify-items:end;gap:2px}.tutorial-footer-next a{max-width:none;text-align:right;color:var(--guide-green)}