@charset "UTF-8";
:root{color-scheme:light;--bg:#fff9ed;--panel:#fff;--text:#142f50;--muted:#728295;--gold:#eb4625;--line:#e7e1d7}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:140px}body{margin:0;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.8}a{color:inherit;text-decoration:none}button{font:inherit}a:focus-visible,button:focus-visible{outline:3px solid #2386c8;outline-offset:4px}header{position:sticky;top:0;z-index:5;background:#fff9edf5;border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.nav{max-width:1200px;margin:auto;padding:18px 32px;display:flex;align-items:center;gap:30px}.brand{font-size:21px;font-weight:900;margin-right:auto;white-space:nowrap}.brand b{display:inline-block;background:var(--gold);color:white;border-radius:11px;padding:2px 9px;margin-right:7px}nav{display:flex;gap:28px;font-size:14px}nav a{color:var(--muted)}nav 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p{max-width:500px;color:#536b83;font-size:16px}.eyebrow{font-size:12px;letter-spacing:1.5px;color:var(--gold);font-weight:700}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.hero-art{text-align:center;position:relative}.hero-art img{width:100%;max-height:330px;object-fit:contain}.art-label{font-size:13px;margin-top:12px;display:inline-block;background:#fffdf7df;border:1px solid var(--line);border-radius:24px;padding:7px 16px}.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}.chips span{background:#fffdf6e6;border:1px solid var(--line);padding:4px 10px;font-size:12px;border-radius:20px;color:#536b83}.tutorial-nav{display:flex;gap:12px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding:24px 0}.tutorial-nav a{font-size:14px;padding:8px 16px;border-radius:22px;background:white;border:1px solid var(--line)}.tutorial-nav a:hover{color:var(--gold);border-color:var(--gold)}.section{padding:55px 0}.section+.section{border-top:1px solid var(--line)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}.section h2{font-size:32px;line-height:1.4;margin:8px 0}.section-head p{color:var(--muted);max-width:460px;margin:0;font-size:14px}.tutorial-card{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;padding:34px;margin:24px 0;border:1px solid var(--line);border-radius:24px;background:white;scroll-margin-top:140px}.tutorial-card:nth-of-type(even) .tutorial-image{order:2}.tutorial-image{position:relative;border:0;padding:0;background:#fff8ec;border-radius:20px;overflow:hidden;cursor:zoom-in;display:block;max-width:300px;justify-self:center;width:100%;box-shadow:0 8px 24px #1734530a}.tutorial-image img{display:block;width:100%;height:auto}.diagram .tutorial-image{max-width:100%;border:1px solid var(--line);border-radius:18px;box-shadow:none}.image-tag{position:absolute;top:10px;left:10px;z-index:1;padding:3px 8px;font-size:10px;border-radius:10px;color:white;background:#173453}.diagram .image-tag{position:static;display:block;border-radius:0;background:#eef4f7;color:#536b83;text-align:left;padding:7px 14px}.tutorial-number{color:var(--gold);background:#fff1e9;border-radius:20px;padding:6px 13px;font-size:12px;font-weight:700}.tutorial-copy h3{font-size:27px;line-height:1.4;margin:20px 0 14px}.tutorial-copy p{color:#536b83;font-size:15px}.tutorial-tip,.note{border-left:3px solid var(--gold);padding:12px 16px;color:#667e91;background:#fff9ed;font-size:13px;margin:22px 0}.card{padding:26px;background:white;border:1px solid var(--line);border-radius:18px}.card h3{margin:0 0 10px;font-size:18px}.card p,.card small{color:var(--muted);font-size:14px}.rates{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.number{font-size:44px;font-weight:800;color:var(--gold);line-height:1.3;margin:14px 0}.cta{padding:36px;border:1px solid var(--line);border-radius:22px;background:#fffdf8 url(assets/landscape.webp) right bottom/auto 100% no-repeat;display:flex;align-items:center;justify-content:space-between;gap:30px}.cta h2{margin:0 0 8px;font-size:28px}.cta p{color:var(--muted);margin:0}.bot-entry{text-align:center;justify-self:center;padding:35px;border-radius:24px;background:#fff9ed;width:100%;max-width:320px}.bot-entry img{width:140px;height:150px;object-fit:contain}.bot-entry strong{display:block;font-size:21px}.bot-entry small{display:block;color:var(--muted);margin-top:12px}footer{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:12px}.footer-inner{display:flex;justify-content:space-between;gap:20px}#tutorialPreview{background:var(--bg);color:var(--text);border:1px solid var(--line);border-radius:18px;padding:22px;max-width:min(92vw,800px);max-height:92vh;overflow:auto}#tutorialPreview::backdrop{background:#122b48b3}#tutorialPreview img{width:100%;height:auto;display:block;border-radius:10px}#tutorialPreview p{margin:0 44px 14px 0}.preview-close{position:absolute;right:12px;top:10px;width:36px;height:36px;border:0;border-radius:50%;background:white;color:#173453;font-size:26px;cursor:pointer}
@media(max-width:760px){.nav{padding:12px 18px;gap:12px;flex-wrap:wrap}.brand{font-size:18px}.nav>.button{font-size:12px;padding:7px 12px}nav{width:100%;order:3;justify-content:space-between;gap:12px}.wrap{padding:0 18px}.hero{grid-template-columns:1fr;padding:36px 0 28px;gap:12px;background-position:center bottom;background-size:auto 65%}.hero h1{font-size:40px}.hero p{font-size:14px}.hero-art img{max-height:230px}.hero-art{max-width:320px;margin:auto}.art-label{font-size:11px}.section{padding:36px 0}.section-head{display:block}.section h2{font-size:26px}.tutorial-card{grid-template-columns:1fr;gap:24px;padding:20px;border-radius:20px}.tutorial-card:nth-of-type(even) .tutorial-image{order:0}.tutorial-copy h3{font-size:23px}.tutorial-image{max-width:280px}.diagram .tutorial-image{max-width:500px}.tutorial-nav{gap:8px;padding:18px 0}.tutorial-nav a{padding:7px 10px;font-size:12px}.rates{grid-template-columns:1fr}.rates .card{display:grid;grid-template-columns:1fr auto;gap:8px}.rates .number{grid-row:1/3;grid-column:2;margin:0;font-size:36px}.rates h3{margin:0}.cta{padding:24px;display:block}.cta>.button{margin-top:20px}.footer-inner{display:block}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}