:root{--bg:#fafafa;--bg-elev:#fff;--bg-soft:#f4f4f5;--ink:#18181b;--ink-2:#52525b;--ink-3:#a1a1aa;--line:#e4e4e7;--line-strong:#d4d4d8;--accent:#4f46e5;--accent-2:#7c3aed;--accent-ink:#fff;--accent-soft:#eef2ff;--accent-border:#c7d2fe;--amber:#d97706;--amber-soft:#fef3c7;--green:#059669;--green-soft:#ecfdf5;--grad:linear-gradient(120deg, #4f46e5 0%, #7c3aed 100%);--shadow-lg:0 24px 64px -18px #18181b24, 0 4px 12px -6px #18181b0f;--shadow-md:0 14px 36px -14px #18181b24, 0 3px 10px -4px #18181b0f;--shadow-sm:0 2px 10px -4px #18181b1a;--radius:16px;--radius-lg:20px;--font-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI Variable Display", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;--font-mono:ui-monospace, "Cascadia Code", "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", monospace;--font-serif:"Iowan Old Style", "Palatino Linotype", "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", SimSun, serif;--wrap:1140px}html[data-theme=dark]{--bg:#09090b;--bg-elev:#131316;--bg-soft:#1b1b1f;--ink:#fafafa;--ink-2:#a1a1aa;--ink-3:#71717a;--line:#27272a;--line-strong:#3f3f46;--accent:#818cf8;--accent-2:#a78bfa;--accent-ink:#0f0d1a;--accent-soft:#818cf81f;--accent-border:#818cf852;--amber:#fbbf24;--amber-soft:#fbbf241f;--green:#34d399;--green-soft:#34d3991f;--grad:linear-gradient(120deg, #818cf8 0%, #a78bfa 100%);--shadow-lg:0 24px 64px -18px #000000a6, 0 4px 12px -6px #0006;--shadow-md:0 14px 36px -14px #0009, 0 3px 10px -4px #00000059;--shadow-sm:0 2px 10px -4px #00000073}*,:before,:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font-family:var(--font-sans);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;margin:0;font-size:16px;line-height:1.65;transition:background-color .3s,color .3s}img,svg{max-width:100%;display:block}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit}::selection{background:color-mix(in srgb, var(--accent) 88%, transparent);color:#fff}:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}.wrap{width:min(var(--wrap), calc(100% - 48px));margin-inline:auto}.skip-link{z-index:100;background:var(--ink);color:var(--bg);border-radius:999px;padding:10px 16px;font-size:13px;transition:transform .2s;position:fixed;top:10px;left:10px;transform:translateY(-160%)}.skip-link:focus{transform:translateY(0)}.site-header{z-index:40;border-bottom:1px solid color-mix(in srgb, var(--line) 70%, transparent);background:color-mix(in srgb, var(--bg) 78%, transparent);-webkit-backdrop-filter:blur(16px)saturate(1.4);position:sticky;top:0}.nav{align-items:center;gap:28px;min-height:68px;display:flex}.brand{flex:none;align-items:center;gap:10px;display:inline-flex}.brand-mark{width:30px;height:30px;color:var(--accent);flex:none}.brand-name{letter-spacing:-.01em;font-size:14px;font-weight:650}.brand-parent{font-family:var(--font-mono);letter-spacing:.08em;color:var(--ink-3);border:1px solid var(--line);border-radius:999px;margin-left:2px;padding:2px 6px;font-size:9px}.nav-links{align-items:center;gap:24px;margin-left:8px;display:flex}.nav-links a{color:var(--ink-2);padding:6px 0;font-size:13.5px;font-weight:500;transition:color .2s;position:relative}.nav-links a:after{content:"";background:var(--grad);transform-origin:0;border-radius:2px;height:2px;transition:transform .25s cubic-bezier(.22,.8,.24,1);position:absolute;bottom:0;left:0;right:0;transform:scaleX(0)}.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--ink)}.nav-links a:hover:after,.nav-links a[aria-current=page]:after{transform:scaleX(1)}.nav-actions{align-items:center;gap:8px;margin-left:auto;display:flex}.icon-btn{border:1px solid var(--line);background:var(--bg-elev);width:36px;height:36px;color:var(--ink-2);cursor:pointer;border-radius:999px;place-items:center;transition:border-color .2s,color .2s,background .2s,transform .2s;display:inline-grid}.icon-btn:hover{border-color:var(--line-strong);color:var(--ink);transform:translateY(-1px)}.icon-btn svg{width:16px;height:16px}.lang-select .lang-btn{width:auto;height:36px;font-family:var(--font-mono);letter-spacing:.06em;align-items:center;gap:6px;padding:0 11px;font-size:11.5px;font-weight:600;display:inline-flex}.lang-select .lang-btn svg{flex:none;width:15px;height:15px}.lang-select .lang-btn .chev{opacity:.5;width:12px;height:12px;transition:transform .2s}.lang-select .lang-btn[aria-expanded=true] .chev{transform:rotate(180deg)}.lang-select{position:relative}.lang-menu{z-index:50;border:1px solid var(--line);background:var(--bg-elev);min-width:168px;box-shadow:var(--shadow-md);border-radius:14px;gap:2px;padding:6px;display:grid;position:absolute;top:calc(100% + 8px);right:0}.lang-menu[hidden]{display:none}.lang-menu button{width:100%;color:var(--ink-2);text-align:left;cursor:pointer;background:0 0;border:0;border-radius:9px;align-items:center;gap:10px;padding:8px 10px;font-size:13px;transition:background .15s,color .15s;display:flex}.lang-menu button:hover{background:var(--bg-soft);color:var(--ink)}.lang-menu button[aria-current=true]{background:var(--accent-soft);color:var(--accent);font-weight:600}.lang-menu .lang-code{width:26px;font-family:var(--font-mono);letter-spacing:.04em;text-align:center;border:1px solid var(--line);background:var(--bg);border-radius:6px;flex:none;padding:2px 0;font-size:10.5px;font-weight:600}.lang-menu button[aria-current=true] .lang-code{border-color:var(--accent-border)}.stack-grid{gap:14px;display:grid}.theme-btn .icon-sun{display:none}html[data-theme=dark] .theme-btn .icon-sun{display:block}html[data-theme=dark] .theme-btn .icon-moon{display:none}.nav-cta{background:var(--grad);color:#fff;letter-spacing:.01em;height:36px;box-shadow:0 6px 18px -6px color-mix(in srgb, var(--accent) 55%, transparent);border-radius:999px;align-items:center;gap:8px;padding:0 16px;font-size:12.5px;font-weight:600;transition:transform .2s,box-shadow .2s,filter .2s;display:inline-flex}.nav-cta:hover{filter:brightness(1.08);box-shadow:0 10px 24px -6px color-mix(in srgb, var(--accent) 60%, transparent);transform:translateY(-1px)}.nav-cta svg{width:14px;height:14px}.menu-btn{display:none}.drawer{z-index:60;background:var(--bg);grid-template-columns:1fr;align-content:start;gap:4px;padding:92px 28px 28px;transition:transform .32s cubic-bezier(.22,.8,.24,1);display:grid;position:fixed;inset:0;transform:translateY(-100%)}.drawer[aria-hidden=false]{transform:translateY(0)}.drawer a{border-bottom:1px solid var(--line);letter-spacing:-.01em;justify-content:space-between;align-items:baseline;padding:16px 0;font-size:22px;font-weight:600;display:flex}.drawer a span{font-family:var(--font-mono);color:var(--ink-3);letter-spacing:.08em;font-size:11px}.drawer-close{position:absolute;top:18px;right:24px}.eyebrow{border:1px solid var(--line);background:var(--bg-elev);font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);border-radius:999px;align-items:center;gap:8px;margin:0 0 18px;padding:5px 12px 5px 10px;font-size:10.5px;font-weight:500;display:inline-flex}.eyebrow:before{content:"";background:var(--accent);width:6px;height:6px;box-shadow:0 0 0 3px var(--accent-soft);border-radius:50%}.display,h1,h2,h3{letter-spacing:-.03em;font-weight:650}.display{margin:0;font-size:clamp(42px,5.6vw,72px);line-height:1.05}.display em{background:var(--grad);color:#0000;-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-style:normal}h1{margin:0;font-size:clamp(36px,4.8vw,58px);line-height:1.08}h2{margin:0;font-size:clamp(27px,3.4vw,40px);line-height:1.15}h3{letter-spacing:-.015em;margin:0;font-size:19px;line-height:1.3}.lede{max-width:56ch;color:var(--ink-2);margin:22px 0 0;font-size:clamp(15.5px,1.6vw,17.5px);line-height:1.75}.small{color:var(--ink-3);font-size:13px}.serif{font-family:var(--font-serif)}.mono{font-family:var(--font-mono)}.grad-text{background:var(--grad);color:#0000;-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.btn{border:1px solid var(--line-strong);background:var(--bg-elev);min-height:46px;color:var(--ink);letter-spacing:-.005em;cursor:pointer;border-radius:999px;justify-content:center;align-items:center;gap:9px;padding:0 22px;font-size:14px;font-weight:600;transition:transform .2s,background .2s,border-color .2s,box-shadow .2s,filter .2s;display:inline-flex}.btn:hover{border-color:var(--ink-3);box-shadow:var(--shadow-sm);transform:translateY(-1px)}.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 24px -8px color-mix(in srgb, var(--accent) 50%, transparent);border:0}.btn-primary:hover{filter:brightness(1.08);box-shadow:0 12px 28px -8px color-mix(in srgb, var(--accent) 58%, transparent)}.btn[disabled],.btn-disabled{cursor:not-allowed;opacity:.55;box-shadow:none;transform:none}.btn svg{width:15px;height:15px}.arrow-link{color:var(--accent);align-items:center;gap:7px;font-size:14px;font-weight:600;transition:gap .2s;display:inline-flex}.arrow-link svg{width:14px;height:14px;transition:transform .2s}.arrow-link:hover{gap:10px}.hero{padding:clamp(60px,8vw,104px) 0 clamp(56px,7vw,92px);position:relative;overflow:hidden}.hero:before{content:"";background:radial-gradient(42% 46% at 18% 12%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%), radial-gradient(36% 40% at 82% 8%, color-mix(in srgb, var(--accent-2) 13%, transparent), transparent 70%), radial-gradient(30% 34% at 65% 40%, var(--amber-soft), transparent 70%);pointer-events:none;z-index:0;position:absolute;inset:-20% -10% 0}.hero:after{content:"";background-image:linear-gradient(color-mix(in srgb, var(--ink) 4%, transparent) 1px, transparent 1px), linear-gradient(90deg, color-mix(in srgb, var(--ink) 4%, transparent) 1px, transparent 1px);pointer-events:none;z-index:0;background-size:44px 44px;position:absolute;inset:0;-webkit-mask-image:radial-gradient(70% 60% at 50% 30%,#000 0%,#0000 100%);mask-image:radial-gradient(70% 60% at 50% 30%,#000 0%,#0000 100%)}.hero .wrap{z-index:1;position:relative}.hero-grid{grid-template-columns:minmax(0,1.05fr) minmax(340px,.95fr);align-items:center;gap:clamp(36px,6vw,76px);display:grid}.hero-copy{max-width:640px}.hero-copy .display{margin-bottom:24px}.hero-copy>*{animation:.7s cubic-bezier(.22,.8,.24,1) backwards rise}.hero-copy>:first-child{animation-delay:20ms}.hero-copy>:nth-child(2){animation-delay:80ms}.hero-copy>:nth-child(3){animation-delay:.14s}.hero-copy>:nth-child(4){animation-delay:.2s}.hero-copy>:nth-child(5){animation-delay:.26s}@keyframes rise{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}.hero-actions{flex-wrap:wrap;gap:12px;margin-top:30px;display:flex}.hero-note{flex-wrap:wrap;gap:8px 10px;margin-top:26px;display:flex}.hero-note span{border:1px solid var(--line);background:color-mix(in srgb, var(--bg-elev) 70%, transparent);color:var(--ink-2);border-radius:999px;align-items:center;gap:7px;padding:5px 12px;font-size:12px;font-weight:500;display:inline-flex}.hero-note span:before{content:"";background:var(--green);border-radius:50%;width:5px;height:5px}.hero-art{isolation:isolate;min-height:440px;animation:.9s .15s backwards fade-in;position:relative}@keyframes fade-in{0%{opacity:0}to{opacity:1}}.art-glow{background:radial-gradient(closest-side, color-mix(in srgb, var(--accent) 26%, transparent), transparent 72%);filter:blur(36px);z-index:-1;border-radius:50%;position:absolute;inset:12% 2% 14% 8%}.reader-mock{border:1px solid var(--line);background:var(--bg-elev);box-shadow:var(--shadow-lg);border-radius:14px;grid-template-rows:auto 1fr auto;animation:7s ease-in-out infinite mock-float;display:grid;position:absolute;inset:2% 0 6% 6%;overflow:hidden}@keyframes mock-float{0%,to{transform:translateY(0)}50%{transform:translateY(-9px)}}.reader-bar{border-bottom:1px solid var(--line);background:color-mix(in srgb, var(--bg-soft) 60%, var(--bg-elev));align-items:center;gap:6px;height:40px;padding:0 14px;display:flex}.reader-bar .dot{background:var(--line-strong);border-radius:50%;width:9px;height:9px}.reader-bar .dot.red{background:#f87171}.reader-bar .dot.yellow{background:#fbbf24}.reader-bar .dot.green{background:#34d399}.reader-bar .title{color:var(--ink-2);margin-left:10px;font-size:11px;font-weight:600}.reader-bar .reader-chip{background:var(--accent-soft);color:var(--accent);font-family:var(--font-mono);letter-spacing:.08em;border-radius:999px;margin-left:auto;padding:2px 8px;font-size:8.5px;font-weight:600}.reader-body{grid-template-columns:118px minmax(0,1fr);min-height:0;display:grid}.reader-side{border-right:1px solid var(--line);background:color-mix(in srgb, var(--bg-soft) 55%, var(--bg-elev));padding:14px 10px}.reader-side .side-title{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:10px;padding-left:6px;font-size:8px}.reader-side .side-item{color:var(--ink-2);white-space:nowrap;text-overflow:ellipsis;border-radius:8px;align-items:center;gap:7px;padding:7px 8px;font-size:10.5px;display:flex;overflow:hidden}.reader-side .side-item:before{content:"";border:1px solid var(--line-strong);background:var(--bg-elev);border-radius:2px;flex:none;width:12px;height:15px}.reader-side .side-item.active{background:var(--bg-elev);border:1px solid var(--accent-border);color:var(--ink);font-weight:600}.reader-side .side-item.active:before{border-color:var(--accent);background:var(--accent-soft)}.reader-page{padding:22px 24px 30px;position:relative}.reader-page .chapter{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-size:8.5px}.reader-page .line{background:color-mix(in srgb, var(--ink) 11%, transparent);border-radius:99px;height:7px;margin-top:11px}.reader-page .line.head{background:color-mix(in srgb, var(--ink) 32%, transparent);height:13px;margin-top:14px}.reader-page .line.w-92{width:92%}.reader-page .line.w-84{width:84%}.reader-page .line.w-76{width:76%}.reader-page .line.w-64{width:64%}.reader-page .line.w-48{width:48%}.reader-page .line.mark{background:color-mix(in srgb, var(--amber) 45%, transparent);box-shadow:0 0 0 2px color-mix(in srgb, var(--amber) 22%, transparent)}.word-pop{border:1px solid var(--line);background:var(--bg-elev);width:min(232px,76%);box-shadow:var(--shadow-md);border-radius:12px;padding:13px 15px;position:absolute;bottom:16px;right:16px}.word-pop:before{content:"";background:var(--grad);border-radius:2px;height:2px;position:absolute;top:0;left:14px;right:14px}.word-pop b{letter-spacing:-.01em;font-size:17px;font-weight:650;display:block}.word-pop .phon{font-family:var(--font-mono);color:var(--ink-3);margin-top:2px;font-size:9px}.word-pop .def{color:var(--ink-2);margin-top:8px;font-size:11px;line-height:1.55}.word-pop .tag{background:var(--accent-soft);color:var(--accent);font-family:var(--font-mono);letter-spacing:.06em;border-radius:999px;margin-top:9px;padding:2px 8px;font-size:8px;font-weight:600;display:inline-block}.reader-status{border-top:1px solid var(--line);background:color-mix(in srgb, var(--bg-soft) 60%, var(--bg-elev));font-family:var(--font-mono);letter-spacing:.08em;color:var(--ink-3);align-items:center;gap:10px;padding:9px 14px;font-size:8.5px;display:flex}.reader-status .progress{background:var(--line);border-radius:99px;flex:1;height:3px;overflow:hidden}.reader-status .progress i{background:var(--grad);border-radius:99px;width:62%;height:100%;display:block}.section{padding:clamp(60px,8vw,104px) 0}.section+.section{border-top:1px solid var(--line)}.section-head{grid-template-columns:minmax(0,1fr) minmax(240px,.55fr);align-items:end;gap:28px;margin-bottom:44px;display:grid}.section-head p{color:var(--ink-2);margin:0;font-size:14.5px;line-height:1.75}.section-head .eyebrow{margin-bottom:14px}.license-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev);padding:22px;transition:transform .25s,border-color .25s,box-shadow .25s;position:relative}.license-card:hover{border-color:var(--accent-border);box-shadow:var(--shadow-md);transform:translateY(-3px)}.card-icon{border:1px solid var(--accent-border);background:var(--accent-soft);width:40px;height:40px;color:var(--accent);border-radius:12px;place-items:center;margin-bottom:14px;display:grid}.card-icon svg{width:20px;height:20px}.license-card .name{letter-spacing:-.01em;color:var(--ink);font-size:15.5px;font-weight:650}.product-feature{grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);align-items:center;gap:clamp(32px,5vw,64px);display:grid}.product-copy h2{max-width:12ch}.product-copy .lede{margin-top:18px}.feature-list{gap:12px;margin:26px 0 0;padding:0;list-style:none;display:grid}.feature-list li{color:var(--ink-2);align-items:flex-start;gap:11px;font-size:14px;display:flex}.feature-list li:before{content:"";background:var(--accent);border-radius:50%;flex:none;width:5px;height:5px;margin-top:9px}.product-actions{flex-wrap:wrap;gap:12px;margin-top:28px;display:flex}.principles{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;display:grid}.principle{border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev);padding:24px;transition:transform .25s,border-color .25s,box-shadow .25s}.principle:hover{border-color:var(--accent-border);box-shadow:var(--shadow-md);transform:translateY(-3px)}.principle .num{font-family:var(--font-mono);letter-spacing:.1em;background:var(--grad);color:#0000;-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:11px;font-weight:600}.principle h3{margin-top:16px}.principle p{color:var(--ink-2);margin:10px 0 0;font-size:13.5px;line-height:1.7}.cta-band{border:1px solid var(--line);border-radius:var(--radius-lg);background:radial-gradient(90% 160% at 100% 0%, var(--accent-soft), transparent 55%), var(--bg-elev);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:28px;padding:clamp(28px,4vw,48px);display:grid}.cta-band h2{max-width:22em;font-size:clamp(26px,3.2vw,36px)}.cta-band p{color:var(--ink-2);margin:12px 0 0;font-size:14px}.cta-band.dark{color:#fafafa;background:linear-gradient(135deg,#312e81 0%,#4c1d95 52%,#1e1b4b 100%);border:0;position:relative;overflow:hidden}.cta-band.dark:before{content:"";pointer-events:none;background-image:linear-gradient(#ffffff0d 1px,#0000 1px),linear-gradient(90deg,#ffffff0d 1px,#0000 1px);background-size:32px 32px;position:absolute;inset:0;-webkit-mask-image:radial-gradient(80% 100% at 80% 0,#000,#0000 100%);mask-image:radial-gradient(80% 100% at 80% 0,#000,#0000 100%)}.cta-band.dark:after{content:"";aspect-ratio:1;filter:blur(28px);pointer-events:none;background:radial-gradient(closest-side,#818cf880,#0000 72%);border-radius:50%;width:46%;position:absolute;bottom:-55%;right:-8%}.cta-band.dark h2{color:#fff}.cta-band.dark p{color:#ffffffb8}.cta-band.dark .eyebrow{color:#ffffffc7;background:#ffffff14;border-color:#ffffff29}.cta-band.dark .eyebrow:before{box-shadow:none;background:#a5b4fc}.cta-band.dark .page-meta span{color:#ffffff9e}.cta-band.dark .page-meta span:before{background:#a5b4fc}.cta-band.dark .btn{color:#fff;background:#ffffff12;border-color:#ffffff38}.cta-band.dark .btn:hover{background:#ffffff1f;border-color:#ffffff59}.cta-band.dark .btn-primary{color:#18181b;background:#fff}.cta-band.dark .btn-primary:hover{filter:none;background:#f4f4f5}.cta-band.dark .btn-disabled{color:#fff9;background:#ffffff0d}.page-head{border-bottom:1px solid var(--line);padding:clamp(52px,7vw,88px) 0 clamp(32px,4vw,52px);position:relative;overflow:hidden}.page-head:before{content:"";background:radial-gradient(40% 60% at 20% 0%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 70%), radial-gradient(34% 54% at 85% 5%, color-mix(in srgb, var(--accent-2) 8%, transparent), transparent 70%);pointer-events:none;position:absolute;inset:-30% -10% 0}.page-head .wrap{position:relative}.page-head .lede{max-width:62ch}.page-meta{font-family:var(--font-mono);letter-spacing:.06em;color:var(--ink-3);flex-wrap:wrap;gap:10px 20px;margin-top:22px;font-size:10.5px;display:flex}.page-meta span{align-items:center;gap:7px;display:inline-flex}.page-meta span:before{content:"";background:var(--accent);border-radius:50%;width:4px;height:4px}.page-grid{grid-template-columns:210px minmax(0,1fr);gap:clamp(32px,6vw,84px);padding:clamp(40px,5vw,64px) 0 clamp(64px,8vw,112px);display:grid}.legal-wrap{max-width:860px;padding:clamp(40px,5vw,64px) 0 clamp(64px,8vw,112px)}.toc{align-self:start;font-size:12.5px;position:sticky;top:96px}.toc .toc-title{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:12px;font-size:9.5px}.toc a{color:var(--ink-3);border-left:1px solid var(--line);padding:6px 0 6px 12px;transition:color .2s,border-color .2s;display:block}.toc a:hover,.toc a.active{color:var(--ink);border-left-color:var(--accent)}.prose{max-width:72ch;color:var(--ink-2);font-size:15px;line-height:1.85}.prose>:first-child{margin-top:0}.prose h2{border-top:1px solid var(--line);color:var(--ink);margin:54px 0 16px;padding-top:18px;scroll-margin-top:96px;font-size:clamp(23px,2.6vw,30px)}.prose h3{color:var(--ink);margin:30px 0 10px;font-size:18px}.prose p{margin:0 0 16px}.prose ul,.prose ol{margin:0 0 18px;padding-left:22px}.prose li{margin:6px 0}.prose li::marker{color:var(--accent)}.prose a:not(.btn){color:var(--accent);text-underline-offset:3px;text-decoration:underline 1px}.prose strong{color:var(--ink);font-weight:650}.prose code{border:1px solid var(--line);background:var(--bg-soft);font-family:var(--font-mono);color:var(--ink);border-radius:5px;padding:2px 6px;font-size:.86em}.prose hr{border:0;border-top:1px solid var(--line);margin:40px 0}.docs-nav a[aria-current=page]{color:var(--ink);border-left-color:var(--accent)}.docs-content .lead{color:var(--ink-2);font-size:16px}.docs-pager{border-top:1px solid var(--line);justify-content:space-between;gap:16px;margin-top:52px;padding-top:22px;display:flex}.docs-pager-link{border:1px solid var(--line);border-radius:var(--radius);background:var(--bg-elev);gap:4px;max-width:46%;padding:14px 18px;font-weight:600;transition:border-color .2s,transform .2s,box-shadow .2s;display:grid;color:var(--ink-2)!important;text-decoration:none!important}.docs-pager-link:hover{border-color:var(--accent-border);box-shadow:var(--shadow-sm);transform:translateY(-2px);color:var(--accent)!important}.docs-pager-link.next{text-align:right}.docs-pager-dir{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);font-size:9px;font-weight:500}.callout{border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 var(--radius) var(--radius) 0;background:var(--bg-elev);color:var(--ink-2);margin:24px 0;padding:18px 20px;font-size:13.5px;line-height:1.75}.callout strong{color:var(--ink)}.callout.green{border-left-color:var(--green)}.data-table{border-collapse:collapse;width:100%;margin:22px 0 28px;font-size:13px;line-height:1.65}.data-table th,.data-table td{border-bottom:1px solid var(--line);text-align:left;vertical-align:top;padding:11px 12px}.data-table th{font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);font-size:9.5px;font-weight:500}.data-table td{color:var(--ink-2)}.data-table tr:last-child td{border-bottom:0}.data-table code{font-size:11.5px}.faq{border-top:1px solid var(--line);max-width:780px}.faq-item{border-bottom:1px solid var(--line)}.faq-q{text-align:left;cursor:pointer;letter-spacing:-.01em;width:100%;color:var(--ink);background:0 0;border:0;justify-content:space-between;align-items:center;gap:18px;padding:20px 0;font-size:15px;font-weight:600;display:flex}.faq-q:after{content:"+";border:1px solid var(--line);background:var(--bg-elev);width:26px;height:26px;font-family:var(--font-mono);color:var(--accent);border-radius:999px;flex:none;place-items:center;font-size:14px;font-weight:400;transition:transform .25s,border-color .2s;display:grid}.faq-q:hover:after{border-color:var(--accent-border)}.faq-item.open .faq-q:after{transform:rotate(45deg)}.faq-a{color:var(--ink-2);padding:0 0 20px;font-size:14px;line-height:1.8;display:none}.faq-item.open .faq-a{display:block}.contact-card{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--bg-elev);box-shadow:var(--shadow-sm);grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:24px;padding:28px;display:grid}.contact-card h3{font-size:22px}.contact-card p{color:var(--ink-2);margin:8px 0 0;font-size:13.5px}.contact-actions{flex-wrap:wrap;gap:10px;display:flex}.license-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:26px;display:grid}.license-card .meta{font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);flex-wrap:wrap;gap:6px 12px;font-size:9.5px;display:flex}.license-card .meta b{color:var(--accent);font-weight:600}.license-card a{color:var(--accent);text-underline-offset:3px;font-size:12px;text-decoration:underline}.not-found{text-align:center;place-items:center;min-height:62vh;display:grid}.not-found .code{font-family:var(--font-mono);letter-spacing:.2em;color:var(--accent);font-size:11px}.not-found h1{background:var(--grad);color:#0000;-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:18px 0 14px;font-size:clamp(46px,8vw,90px)}.not-found p{max-width:46ch;color:var(--ink-2);margin:0 auto 26px}.site-footer{border-top:1px solid var(--line);background:var(--bg-soft)}.footer-main{grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,.7fr));gap:36px;padding:56px 0 42px;display:grid}.footer-brand p{max-width:34ch;color:var(--ink-2);margin:14px 0 0;font-size:13px;line-height:1.7}.footer-col h4{font-family:var(--font-mono);letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin:0 0 12px;font-size:9.5px;font-weight:500}.footer-col a{color:var(--ink-2);padding:4px 0;font-size:13px;transition:color .2s;display:block}.footer-col a:hover{color:var(--accent)}.footer-bottom{border-top:1px solid var(--line);font-family:var(--font-mono);letter-spacing:.06em;color:var(--ink-3);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:18px 0 24px;font-size:9.5px;display:flex}.toast{z-index:80;background:var(--ink);color:var(--bg);opacity:0;pointer-events:none;border-radius:999px;padding:10px 16px;font-size:12.5px;transition:opacity .2s,transform .2s;position:fixed;bottom:26px;left:50%;transform:translate(-50%,20px)}.toast.show{opacity:1;transform:translate(-50%)}.reveal{opacity:0;transition:opacity .7s,transform .7s cubic-bezier(.22,.8,.24,1);transform:translateY(18px)}.reveal.is-in{opacity:1;transform:none}html[data-block-lang=en] [data-locale]:not([data-locale=en]),html[data-block-lang=zh-CN] [data-locale]:not([data-locale=zh-CN]),html[data-block-lang=zh-TW] [data-locale]:not([data-locale=zh-TW]),html[data-block-lang=ja] [data-locale]:not([data-locale=ja]),html[data-block-lang=ko] [data-locale]:not([data-locale=ko]),html[data-block-lang=de] [data-locale]:not([data-locale=de]),html[data-block-lang=fr] [data-locale]:not([data-locale=fr]),html[data-block-lang=it] [data-locale]:not([data-locale=it]),html[data-block-lang=es] [data-locale]:not([data-locale=es]){display:none!important}@media (width<=1100px){.brand-parent{display:none}}@media (width<=960px){.hero-grid,.product-feature{grid-template-columns:1fr}.hero-art{width:100%;max-width:560px;min-height:400px;margin-inline:auto}.principles,.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.page-grid{grid-template-columns:1fr}.toc{border-bottom:1px solid var(--line);flex-wrap:wrap;gap:4px 14px;padding-bottom:18px;display:flex;position:static}.toc .toc-title{width:100%}.toc a{border-left:0;padding:3px 0}.cta-band{grid-template-columns:1fr}}@media (width<=760px){.wrap{width:min(var(--wrap), calc(100% - 36px))}.nav{min-height:62px}.nav-links,.nav-cta{display:none}.menu-btn{display:inline-grid}.hero{padding-top:48px}.hero-art{min-height:340px}.reader-body{grid-template-columns:1fr}.reader-side{display:none}.seal{width:54px;height:54px;font-size:18px}.section-head{grid-template-columns:1fr;align-items:start}.principles,.tool-grid,.contact-card,.license-grid{grid-template-columns:1fr}.footer-main{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.data-table{white-space:nowrap;display:block;overflow-x:auto}}@media (width<=460px){.footer-main{grid-template-columns:1fr}.hero-actions .btn{width:100%}.page-meta{gap:6px 12px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}.hero-copy>*{animation:none}.reveal{opacity:1;transform:none}}