:root{--bg:#f7f5f0;--paper:#fff;--ink:#1e2c35;--muted:#64737b;--line:#e2e5e3;--accent:#cc6f40;--accent-deep:#a94d24;--wash:#f7eadd;--blue:#327086;--radius:20px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 "Microsoft YaHei","PingFang SC","Noto Sans CJK SC",system-ui,sans-serif}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button{font:inherit}img{max-width:100%;height:auto}::selection{background:#ead0b9;color:var(--ink)}
.skip-link{position:absolute;left:12px;top:-80px;padding:8px 12px;background:#fff;z-index:100}.skip-link:focus{top:8px}.container{width:min(1180px,calc(100% - 40px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(247,245,240,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.header-inner{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.03em;font-size:19px;white-space:nowrap}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:var(--ink);color:#f7d48a;font-size:23px;line-height:1}.site-nav{display:flex;align-items:center;gap:20px;color:#53626a;font-size:14px}.site-nav a:hover,.site-nav a[aria-current="page"]{color:var(--accent-deep)}.header-action{font-size:13px;border:1px solid #cfcbc3;border-radius:999px;padding:7px 14px;white-space:nowrap}.header-action:hover{border-color:var(--accent)}
.eyebrow{color:var(--accent-deep);font-size:12px;letter-spacing:.15em;font-weight:800;text-transform:uppercase}.hero{padding:74px 0 63px;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:64px;align-items:center}.hero h1{font-size:clamp(39px,5.2vw,72px);line-height:1.12;letter-spacing:-.055em;margin:15px 0 22px;max-width:750px}.hero p{font-size:18px;line-height:1.8;color:var(--muted);max-width:600px;margin:0 0 27px}.hero-actions,.inline-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}.button{display:inline-flex;justify-content:center;align-items:center;gap:8px;min-height:46px;padding:10px 18px;border-radius:11px;border:1px solid transparent;font-weight:700;font-size:14px;cursor:pointer;transition:transform .16s,background .16s,border-color .16s}.button:active{transform:scale(.98)}.button-primary{background:var(--ink);color:#fff}.button-primary:hover{background:#31434d}.button-accent{background:var(--accent);color:#fff}.button-accent:hover{background:var(--accent-deep)}.button-ghost{border-color:#cbd2d1;background:#fff;color:var(--ink)}.button-ghost:hover{border-color:var(--accent)}.fine-print{display:block;margin-top:13px;font-size:13px;color:var(--muted)}
.hero-art{min-height:310px;border-radius:30px;background:#e9e4db;padding:28px;position:relative;overflow:hidden}.hero-art:before{content:"";position:absolute;width:310px;height:310px;border-radius:50%;background:#edd0ba;right:-100px;top:-130px}.art-window{position:relative;background:#fff;box-shadow:0 20px 50px #2a31342b;border:1px solid #dadfdf;border-radius:16px;padding:0 24px 24px;transform:rotate(-3deg);margin:20px 28px 0 0}.art-window-top{height:41px;display:flex;gap:6px;align-items:center;border-bottom:1px solid var(--line)}.dot{width:8px;height:8px;border-radius:50%;background:#d6dbda}.art-line{height:11px;background:#e8edeb;border-radius:10px;margin-top:14px}.art-line.short{width:45%}.art-line.medium{width:72%}.art-shot{margin-top:19px;height:107px;border-radius:8px;background:linear-gradient(155deg,#d9e8e8 0 28%,#a7c5ce 29% 57%,#e9b996 58% 100%);border:1px solid #c4d6d7}.art-badge{position:absolute;right:16px;bottom:25px;background:#fff7ec;border:1px solid #eac7a9;border-radius:11px;padding:9px 13px;font-weight:800;color:#a94d24;box-shadow:0 6px 16px #7b421b20}
.section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:20px 0 24px}.section-heading h2{font-size:30px;line-height:1.25;letter-spacing:-.035em;margin:8px 0 0}.section-heading p{color:var(--muted);margin:0}.tutorial-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-bottom:68px}.tutorial-card{display:flex;flex-direction:column;min-height:238px;background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .2s,border-color .2s,box-shadow .2s}.tutorial-card:hover{transform:translateY(-3px);border-color:#d6b08e;box-shadow:0 12px 26px #263a3e0b}.card-top{display:flex;align-items:center;justify-content:space-between}.card-kicker{font-size:12px;letter-spacing:.1em;color:var(--accent-deep);font-weight:800}.card-arrow{font-size:28px;font-weight:300;color:var(--accent-deep);line-height:1}.tutorial-card h3{font-size:26px;line-height:1.3;margin:23px 0 7px;letter-spacing:-.03em}.tutorial-card p{color:var(--muted);margin:0;max-width:45ch}.card-foot{margin-top:auto;padding-top:18px;font-size:13px;color:#75838a}.site-footer{border-top:1px solid var(--line);padding:25px 0 38px;font-size:13px;color:var(--muted)}
.detail-shell{display:grid;grid-template-columns:200px minmax(0,1fr);gap:44px;padding-top:52px;padding-bottom:80px}.detail-nav{position:sticky;top:110px;align-self:start}.detail-nav .label{font-size:11px;font-weight:800;letter-spacing:.14em;color:#839096;margin:0 0 14px}.detail-nav a{display:block;border-left:2px solid transparent;padding:10px 13px;font-size:14px;color:#627078}.detail-nav a:hover,.detail-nav a[aria-current="page"]{border-color:var(--accent);color:var(--ink);background:#f1ede5;font-weight:700}.detail-main{min-width:0}.back-link{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:13px;margin-bottom:16px}.back-link:hover{color:var(--accent-deep)}.detail-head{padding-bottom:28px;border-bottom:1px solid var(--line)}.detail-head h1{font-size:clamp(36px,4.5vw,60px);line-height:1.18;letter-spacing:-.048em;margin:10px 0 14px}.detail-head p{color:var(--muted);max-width:66ch;margin:0 0 21px}.meta-line{display:flex;gap:12px;flex-wrap:wrap;align-items:center;font-size:13px;color:#748188}.meta-line span{border-radius:999px;border:1px solid #d8ddda;padding:3px 10px}.copy-panel{display:flex;align-items:center;justify-content:space-between;gap:22px;background:#f3e5d6;border:1px solid #e6c6a8;border-radius:var(--radius);padding:22px 24px;margin:28px 0}.copy-panel strong{display:block;font-size:17px}.copy-panel p{font-size:13px;color:#665e58;margin:4px 0 0;max-width:59ch}.copy-panel .button{white-space:nowrap}.steps{margin-top:33px}.steps-heading{font-size:14px;letter-spacing:.12em;color:#7e8a8f;font-weight:800;text-transform:uppercase;margin-bottom:16px}.step{border-top:1px solid var(--line);padding:30px 0 38px;scroll-margin-top:95px}.step-heading{display:flex;gap:17px;align-items:start}.step-number{flex:none;display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:#ede7da;color:var(--accent-deep);font-size:13px;font-weight:900}.step h2{font-size:23px;line-height:1.4;margin:2px 0 0;letter-spacing:-.025em}.step-body{margin-left:55px}.step-body p{margin:10px 0 0;color:#536168;max-width:70ch}.step-body figure{margin:18px 0 0}.step-body figure img,.pdf-page img{display:block;border:1px solid #dde1de;border-radius:10px;box-shadow:0 8px 24px #1d354109;background:#fff}.step-body figure img{max-height:730px;object-fit:contain;object-position:left top}.step-body figcaption{font-size:12px;color:#88949a;margin-top:7px}.step-extra{margin-top:20px;border:1px solid #e5d9cb;background:#fffbf6;border-radius:12px;padding:15px 17px}.step-extra p{margin:0 0 12px}.notice{border-left:3px solid var(--accent);background:#fff8ed;color:#5d5a55;padding:14px 18px;margin:18px 0 0;border-radius:0 10px 10px 0}.notice p{margin:0}.pdf-pages{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px;margin-top:22px}.pdf-page{margin:0;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px}.pdf-page img{border:0;box-shadow:none;border-radius:4px;width:100%}.pdf-page figcaption{font-size:12px;color:#849097;padding:8px 4px 2px}.original-panel{display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:30px;margin-top:10px}.original-panel h2{font-size:22px;margin:0 0 4px}.original-panel p{font-size:13px;color:var(--muted);margin:0}.toast{position:fixed;z-index:100;bottom:22px;left:50%;transform:translate(-50%,16px);background:#1e2c35;color:white;border-radius:11px;padding:11px 18px;box-shadow:0 12px 30px #10262e3d;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;font-size:14px}.toast.show{opacity:1;transform:translate(-50%,0)}:focus-visible{outline:3px solid #b95c2b;outline-offset:3px}
@media(max-width:860px){.hero{grid-template-columns:1fr;padding:52px 0}.hero-art{min-height:230px}.detail-shell{grid-template-columns:1fr;gap:0;padding-top:28px}.detail-nav{position:static;display:flex;overflow:auto;gap:4px;margin-bottom:23px}.detail-nav .label{display:none}.detail-nav a{white-space:nowrap;border-left:0;border-bottom:2px solid transparent;padding:9px 12px}.detail-nav a[aria-current="page"]{border-bottom-color:var(--accent)}.site-nav{display:none}}
@media(max-width:600px){.container{width:min(100% - 26px,1180px)}.header-inner{min-height:64px}.brand{font-size:16px}.brand-mark{width:33px;height:33px;font-size:20px}.header-action{font-size:12px;padding:6px 10px}.hero{gap:28px;padding:40px 0}.hero h1{font-size:39px}.hero p{font-size:16px}.hero-art{display:none}.section-heading{display:block}.section-heading h2{font-size:26px}.tutorial-grid{grid-template-columns:1fr;gap:12px}.tutorial-card{min-height:190px;padding:21px}.tutorial-card h3{font-size:23px;margin-top:18px}.detail-head h1{font-size:37px}.copy-panel,.original-panel{display:block}.copy-panel .button,.original-panel .button{margin-top:14px;width:100%}.step{padding:24px 0 30px}.step h2{font-size:20px}.step-number{width:32px;height:32px}.step-heading{gap:10px}.step-body{margin-left:0}.pdf-pages{grid-template-columns:1fr}.pdf-page{padding:8px}.step-body figure img{max-height:none}.button{min-height:46px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}
.pdf-pages{grid-template-columns:1fr;max-width:780px}