.ln-hero{padding:clamp(3.5rem, 7vw, 5.5rem) var(--gutter) clamp(2.5rem, 5vw, 4rem)}.ln-hero__inner{text-align:center;max-width:860px;margin:0 auto}.ln-hero__h1{margin:var(--space-4) 0 0;font-family:var(--font-display);letter-spacing:-.02em;color:#f2f0e7;text-wrap:balance;font-size:clamp(2.6rem,1.4rem + 5vw,5rem);font-weight:600;line-height:1.06}:lang(zh) .ln-hero__h1{letter-spacing:.04em}.ln-hero__tag{margin:var(--space-5) auto 0;max-width:32em;font-family:var(--font-display);color:#f2f0e7e0;text-wrap:balance;font-size:clamp(1.15rem,.9rem + .9vw,1.5rem);line-height:1.4}.ln-hero__intro{margin:var(--space-4) auto 0;max-width:38em;color:var(--text-muted);text-wrap:pretty;font-size:1rem;line-height:1.7}.ll{max-width:1200px;margin:clamp(2rem,4vw,3rem) auto 0;position:relative}.ll__svg{width:100%;height:auto;display:block;overflow:visible}.ll__line{fill:none;stroke:#f2f0e7;stroke-width:1.15px;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:1;stroke-dashoffset:1px;animation:1.1s cubic-bezier(.65,0,.35,1) forwards ll-draw}.ll__band{stroke-width:.9px}.ll__book{opacity:var(--lit,.36)}.ll__book--tool .ll__line{stroke-width:1.5px}.ll__book--tool.is-on{filter:url(#ll-glow)}.ll__spine{fill:#f2f0e7;font-family:var(--font-display);opacity:0;font-size:16px;font-weight:600;animation:.8s forwards ll-fade}.ll__spine--en{font-family:var(--font-sans);letter-spacing:.14em;text-transform:uppercase;font-size:13px;font-weight:600}.ll__plank{fill:none;stroke:#f2f0e7;stroke-width:1.4px;opacity:.7;transform-box:fill-box;transform-origin:50%;animation:1.2s cubic-bezier(.16,1,.3,1) .25s both ll-plank}.ll__beam{mix-blend-mode:screen;pointer-events:none;transition:opacity .4s}.ll__motes circle{fill:#f2f0e7}.ll__toolhit{cursor:pointer;outline:none}.ll__toolhit:focus-visible .ll__book{outline:none}@keyframes ll-draw{to{stroke-dashoffset:0}}@keyframes ll-fade{to{opacity:1}}@keyframes ll-plank{0%{opacity:0;transform:scaleX(0)}to{opacity:.7;transform:scaleX(1)}}.ll__labels{height:54px;margin:18px 0 0;padding:0;list-style:none;position:relative}.ll__labels li{left:var(--x);opacity:0;animation:.8s 1.9s forwards ll-fade;position:absolute;top:0;transform:translate(-50%)}.ll__label{white-space:nowrap;flex-direction:column;align-items:center;gap:3px;padding:4px 10px;text-decoration:none;transition:opacity .3s;display:flex}.ll__label-name{font-family:var(--font-display);color:#f2f0e7;font-size:1rem;font-weight:600;transition:letter-spacing .4s cubic-bezier(.16,1,.3,1)}.ll__label-stat{font-family:var(--font-sans);color:var(--text-muted);font-size:12px;transition:color .3s}.ll__label:hover,.ll__label:focus-visible{text-decoration:none}.ll__label.is-on .ll__label-name{letter-spacing:.08em}.ll__label.is-on .ll__label-stat{color:#f2f0e7}.ll.is-active .ll__label:not(.is-on){opacity:.4}@media (max-width:860px){.ll__line{stroke-width:1.8px}.ll__book--tool .ll__line{stroke-width:2.3px}.ll__plank{stroke-width:2.2px}}@media (max-width:640px){.ll{margin-left:calc(-1 * var(--gutter));margin-right:calc(-1 * var(--gutter));padding-top:24px;overflow:hidden}.ll__svg{width:170%;margin-left:-35%}.ll__line{stroke-width:2px}.ll__book--tool .ll__line{stroke-width:2.6px}.ll__band{stroke-width:1.5px}.ll__plank{stroke-width:2.4px}.ll__spine{font-size:20px}.ll__spine--en{font-size:16px}.ll__labels{height:auto;margin:22px var(--gutter) 0;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.ll__labels li{position:static;transform:none}.ll__label{white-space:normal;border:1px solid #f2f0e738;border-radius:10px;align-items:flex-start;padding:14px 14px 12px}.ll__label-stat{line-height:1.4}}@media (prefers-reduced-motion:reduce){.ll__line,.ll__plank,.ll__spine,.ll__labels li{stroke-dashoffset:0;opacity:1;animation:none}.ll__book{opacity:.55}.ll__plank{opacity:.7}}.ln-section{max-width:1140px;padding:var(--section-y) var(--gutter);margin:0 auto}.ln-band{background:var(--sage-50);border-top:1px solid var(--border-hairline);border-bottom:1px solid var(--border-hairline)}.hv-tools.ln-tools{grid-template-columns:repeat(2,minmax(0,1fr))}.ln-tool__for{margin:var(--space-3) 0 0;font-size:var(--text-caption);color:var(--text-muted);line-height:1.55}.ln-steps{gap:var(--space-5);counter-reset:ln-step;grid-template-columns:repeat(3,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.ln-step{counter-increment:ln-step;border-top:2px solid var(--sage-300);padding-top:var(--space-4)}.ln-step:before{content:"0" counter(ln-step);font-family:var(--font-display);color:var(--gold-700);font-size:1.1rem;display:block}.ln-step__when{margin:var(--space-2) 0 0;font-family:var(--font-display);color:var(--text-heading);font-size:1.15rem;font-weight:600}.ln-step__body{margin:var(--space-2) 0 var(--space-3);font-size:var(--text-body-sm);color:var(--text-body);line-height:1.65}@media (max-width:900px){.ln-steps{grid-template-columns:1fr}}@media (max-width:760px){.hv-tools.ln-tools{grid-template-columns:1fr}}