/* 币起步 biqibu.com · 设计系统 · 手绘批注实操笔记本 字体在各页 用 Google Fonts 非阻塞引入(Caveat + Zhi Mang Xing);正文走系统 CJK,LCP 不被 webfont 阻塞 */ :root{ --paper:#FAF4E4; --paper2:#F5EDD6; --card:#FFFDF7; --ink:#21303E; --ink2:#4a5a68; --ink3:#7d8a97; --amber:#FFC83A; --amber-deep:#F0A81E; --amber-soft:#FFF0A6; --pen-red:#E0483F; --pen-teal:#1E9B82; --pen-blue:#2f6db0; --sticky:#FFF0A6; --sticky-blue:#D7ECF6; --sticky-green:#DDEFD6; --grid:rgba(57,46,24,.055); --line:rgba(33,48,62,.16); --line2:rgba(33,48,62,.10); --tip-bg:#E4F4EE; --warn-bg:#FFF4D6; --danger-bg:#FCE6E3; --shadow:0 16px 30px -16px rgba(40,30,10,.45); --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif; --font-hand:"Caveat","Zhi Mang Xing",cursive; --font-zhand:"Zhi Mang Xing","Caveat",cursive; --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace; --wrap:1180px; } *{box-sizing:border-box} html{-webkit-text-size-adjust:100%} body{ margin:0; color:var(--ink); font-family:var(--font-sans); font-size:16px; line-height:1.75; background: repeating-linear-gradient(0deg,transparent,transparent 27px,var(--grid) 27px,var(--grid) 28px), repeating-linear-gradient(90deg,transparent,transparent 27px,var(--grid) 27px,var(--grid) 28px), radial-gradient(120% 90% at 50% -10%, #FCF8EC 0%, var(--paper) 45%, var(--paper2) 100%); background-attachment:fixed; -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility; } img{max-width:100%;height:auto;display:block} a{color:var(--pen-blue);text-decoration:none} a:hover{text-decoration:underline} .wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px} .hand{font-family:var(--font-hand)} .zhand{font-family:var(--font-zhand)} .mono{font-family:var(--font-mono)} .ltr{unicode-bidi:isolate;direction:ltr} .skip{position:absolute;left:-999px} .skip:focus{left:8px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;border-radius:8px;z-index:99} /* ---------- header ---------- */ .site-head{padding:20px 0 8px;position:relative} .bar{display:flex;align-items:center;gap:14px} .bar .brand{margin-right:auto} .brand{display:flex;align-items:baseline;gap:11px;text-decoration:none} .brand:hover{text-decoration:none} .logo{font-weight:900;font-size:27px;letter-spacing:1px;color:var(--ink)} .logo .dot{color:var(--pen-red)} .brand .tag{font-family:var(--font-zhand);font-size:18px;color:var(--ink2);transform:rotate(-3deg)} .nav{display:flex;gap:20px;align-items:center;font-size:15px;font-weight:500;color:var(--ink2)} .nav a{position:relative;padding:3px 0;white-space:nowrap;color:var(--ink2)} .nav a:hover{color:var(--ink);text-decoration:none} .nav a.cur{color:var(--ink);font-weight:700} .nav a.cur::after{content:"";position:absolute;left:-3px;right:-3px;bottom:-4px;height:7px; background:var(--amber);border-radius:6px;z-index:-1;transform:rotate(-1deg)} .rule{width:100%;height:12px;margin-top:8px;color:var(--line);display:block} /* language switcher */ .lang{position:relative} .lang>button{font:inherit;font-weight:600;color:var(--ink2);background:#fff;border:2px solid var(--ink); border-radius:9px;padding:6px 12px;cursor:pointer;box-shadow:2px 2px 0 var(--ink);display:flex;gap:6px;align-items:center} .lang>button:hover{color:var(--ink)} .lang-menu{position:absolute;right:0;top:calc(100% + 8px);background:#fff;border:2px solid var(--ink); border-radius:10px;box-shadow:3px 4px 0 var(--ink);padding:6px;min-width:150px;display:none;z-index:40} .lang.open .lang-menu{display:block} .lang-menu a{display:block;padding:7px 12px;border-radius:7px;color:var(--ink);font-weight:500} .lang-menu a:hover{background:var(--amber-soft);text-decoration:none} /* language switcher (注入自 _i18n.py) */ .langsw{position:relative;flex:none} .langsw>button{font:inherit;font-weight:600;font-size:14px;color:var(--ink2);background:#fff;border:2px solid var(--ink); border-radius:9px;padding:6px 11px;cursor:pointer;box-shadow:2px 2px 0 var(--ink);display:flex;gap:6px;align-items:center;white-space:nowrap} .langsw>button:hover{color:var(--ink)} .lsw-globe{font-size:13px;color:var(--pen-red)} .lsw-menu{position:absolute;right:0;top:calc(100% + 8px);background:#fff;border:2px solid var(--ink);border-radius:10px; box-shadow:3px 4px 0 var(--ink);padding:6px;min-width:148px;display:none;z-index:50} .langsw.open .lsw-menu,.langsw:hover .lsw-menu{display:block} .lsw-menu::before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px} .langsw>button::after{content:"▾";font-size:11px;opacity:.6;margin-inline-start:3px} .lsw-menu a{display:block;padding:7px 12px;border-radius:7px;color:var(--ink);font-weight:500;font-size:15px;text-decoration:none} .lsw-menu a:hover{background:var(--amber-soft);text-decoration:none} .lsw-menu a.on{background:var(--amber);font-weight:700} [dir=rtl] .lsw-menu{right:auto;left:0} [dir=rtl] .bar .brand{margin-right:0;margin-left:auto} /* 非拉丁语种正文字体(对应语种页 另加 Google Font;手写批注退化为该文字常规体) */ html[lang="km"]{--font-sans:"Noto Sans Khmer","PingFang SC",system-ui,sans-serif} html[lang="km"] .hand,html[lang="km"] .zhand{font-family:"Noto Sans Khmer",sans-serif;font-style:normal} html[lang="am"]{--font-sans:"Noto Sans Ethiopic","PingFang SC",system-ui,sans-serif} html[lang="am"] .hand,html[lang="am"] .zhand{font-family:"Noto Sans Ethiopic",sans-serif} html[lang="ur"]{--font-sans:"Noto Naskh Arabic","Noto Sans Arabic",system-ui,sans-serif;font-size:17px} html[lang="ur"] .hand,html[lang="ur"] .zhand{font-family:"Noto Naskh Arabic",serif} /* ---- RTL(ur)---- 拉丁/数字 LTR 隔离 + 阴影镜像 + 隐藏方向性涂鸦 */ [dir=rtl] .code,[dir=rtl] .mono,[dir=rtl] .ci-code,[dir=rtl] .result .big,[dir=rtl] .logo{direction:ltr;unicode-bidi:isolate} [dir=rtl] .result{text-align:right} [dir=rtl] .cta{box-shadow:-4px 5px 0 var(--ink)} [dir=rtl] .cta:hover{box-shadow:-5px 6px 0 var(--ink)} [dir=rtl] .btn,[dir=rtl] .copy,[dir=rtl] .langsw>button{box-shadow:-2px 2px 0 var(--ink)} [dir=rtl] .tile{box-shadow:-3px 4px 0 rgba(33,48,62,.13)} [dir=rtl] .tile:hover{box-shadow:-5px 6px 0 rgba(33,48,62,.16)} [dir=rtl] .callout{box-shadow:-3px 3px 0 rgba(33,48,62,.12)} [dir=rtl] .startnote,[dir=rtl] .arrowbig{display:none} [dir=rtl] .phone .pnote{right:auto;left:-54px} /* ---------- buttons ---------- */ .cta{display:inline-flex;align-items:center;justify-content:center;gap:9px;text-decoration:none; font-weight:900;font-size:17px;color:var(--ink);background:var(--amber);border:2.5px solid var(--ink); border-radius:12px;padding:14px 22px;box-shadow:4px 5px 0 var(--ink); transition:transform .1s,box-shadow .1s;cursor:pointer} .cta:hover{transform:translate(-1px,-1px);box-shadow:5px 6px 0 var(--ink);text-decoration:none} .cta:active{transform:translate(4px,5px);box-shadow:0 0 0 var(--ink)} .btn{display:inline-flex;align-items:center;gap:8px;font:inherit;font-weight:700;color:var(--ink); background:#fff;border:2px solid var(--ink);border-radius:10px;padding:10px 16px;cursor:pointer; box-shadow:2px 2px 0 var(--ink);transition:transform .08s,box-shadow .08s;text-decoration:none} .btn:hover{transform:translate(-1px,-1px);box-shadow:3px 3px 0 var(--ink);text-decoration:none} .btn:active{transform:translate(2px,2px);box-shadow:0 0 0 var(--ink)} .copy{font:inherit;font-weight:700;font-size:14px;color:var(--ink);background:#fff;border:2px solid var(--ink); border-radius:8px;padding:9px 13px;cursor:pointer;box-shadow:2px 2px 0 var(--ink);transition:transform .08s,box-shadow .08s} .copy:active{transform:translate(2px,2px);box-shadow:0 0 0 var(--ink)} .copy.done{background:var(--pen-teal);color:#fff;border-color:var(--pen-teal);box-shadow:none} /* ---------- hand-drawn marks ---------- */ .mark{position:relative;white-space:nowrap} .mark .ul{position:absolute;left:-4px;right:-6px;bottom:-9px;height:15px} .hl{background:linear-gradient(transparent 60%,var(--amber) 60%);padding:0 1px} .hl-red{background:linear-gradient(transparent 60%,#ffc9c4 60%)} /* ---------- sticky note + callouts ---------- */ .note{position:relative;background:var(--sticky);border:1px solid rgba(120,95,20,.18);border-radius:10px; padding:18px 20px;box-shadow:var(--shadow);transform:rotate(-1deg)} .note .tape{position:absolute;top:-12px;left:50%;width:108px;height:24px;transform:translateX(-50%) rotate(-2deg); background:rgba(255,255,255,.45);border:1px dashed rgba(80,70,40,.35)} .callout{border-radius:12px;padding:16px 18px 16px 20px;margin:22px 0;border:2px solid var(--ink);position:relative; background:var(--card);box-shadow:3px 3px 0 rgba(33,48,62,.12)} .callout .clabel{font-family:var(--font-zhand);font-size:19px;line-height:1;margin-bottom:6px;display:inline-block} .callout p:last-child{margin-bottom:0} .callout.tip{background:#E7F5EF;border-color:var(--pen-teal)} .callout.tip .clabel{color:var(--pen-teal)} .callout.warn{background:var(--warn-bg);border-color:var(--amber-deep)} .callout.warn .clabel{color:var(--amber-deep)} .callout.danger{background:var(--danger-bg);border-color:var(--pen-red)} .callout.danger .clabel{color:var(--pen-red)} /* ---------- step rail ---------- */ .rail{display:flex;flex-wrap:wrap;gap:10px 14px;margin:24px 0} .step{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:500;color:var(--ink2)} .step b{display:grid;place-items:center;width:26px;height:26px;border:2px solid var(--ink);border-radius:50%; font-family:var(--font-hand);font-size:18px;font-weight:700;color:var(--ink);background:#fff;transform:rotate(-4deg)} .step:nth-child(4n+2) b{transform:rotate(3deg)} .step:nth-child(4n+3) b{transform:rotate(2deg)} .amini{color:var(--line);font-weight:700} /* ---------- convert card (hero) ---------- */ .convert{position:relative} .note-tip{font-family:var(--font-zhand);font-size:20px;color:var(--pen-red);transform:rotate(-4deg);margin:0 0 6px 8px;display:inline-block} .ccard{position:relative;background:var(--sticky);border-radius:11px;padding:22px 22px 18px;box-shadow:var(--shadow); transform:rotate(-1.2deg);border:1px solid rgba(120,95,20,.18)} .ccard .lbl{font-size:13px;font-weight:700;letter-spacing:1px;color:#7a6410} .codei{display:flex;align-items:center;gap:10px;margin:8px 0 4px} .code{flex:1;font-family:var(--font-mono);font-weight:700;font-size:28px;letter-spacing:3px;color:var(--ink); background:#fff;border:2px dashed var(--amber-deep);border-radius:8px;padding:8px 12px;text-align:center} .benefit{font-weight:700;color:var(--ink);font-size:14px;margin:13px 2px 0;display:flex;gap:7px;align-items:flex-start} .benefit .pct{color:var(--pen-red)} .benefit b{color:var(--pen-red)} .ccard .cta{width:100%;margin-top:15px;font-size:18px} .foot-note{font-size:12px;line-height:1.6;color:#8a7a48;margin:11px 2px 0} /* ---------- generic sections ---------- */ .section{padding:46px 0} .section-h{font-size:27px;font-weight:900;margin:0 0 6px;letter-spacing:.5px} .section-sub{color:var(--ink2);margin:0 0 24px;font-size:15px} .eyebrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:13px;letter-spacing:2px;color:var(--ink2)} .eyebrow .pg{background:var(--ink);color:var(--paper);border-radius:5px;padding:2px 8px;font-size:12px;letter-spacing:1px} /* card grids (index) */ .grid{display:grid;gap:18px} .g3{grid-template-columns:repeat(3,1fr)} .g2{grid-template-columns:repeat(2,1fr)} .g4{grid-template-columns:repeat(4,1fr)} .tile{display:block;background:var(--card);border:2px solid var(--ink);border-radius:13px;padding:18px 18px 16px; box-shadow:3px 4px 0 rgba(33,48,62,.13);transition:transform .1s,box-shadow .1s;color:var(--ink)} .tile:hover{transform:translate(-2px,-2px);box-shadow:5px 6px 0 rgba(33,48,62,.16);text-decoration:none} .tile .k{font-family:var(--font-hand);font-size:20px;color:var(--pen-red);line-height:1} .tile h3{margin:8px 0 6px;font-size:18px;font-weight:800} .tile p{margin:0;color:var(--ink2);font-size:14px;line-height:1.65} .tile .more{margin-top:10px;font-size:13px;font-weight:700;color:var(--pen-blue)} .tag-tool{display:inline-block;font-size:11px;font-weight:700;letter-spacing:1px;color:var(--pen-teal); border:1.5px solid var(--pen-teal);border-radius:5px;padding:1px 7px;margin-bottom:6px} /* ---------- article ---------- */ .crumb{font-size:13px;color:var(--ink3);padding:18px 0 0} .crumb a{color:var(--ink2)} .article{max-width:760px;margin:0 auto;padding:6px 0 40px} .article-head{margin:18px 0 8px} .article h1{font-size:38px;line-height:1.25;font-weight:900;margin:10px 0 14px;letter-spacing:.3px} .meta{display:flex;flex-wrap:wrap;gap:8px 16px;font-size:13.5px;color:var(--ink3);align-items:center} .meta .by{font-weight:700;color:var(--ink2)} .figure{margin:26px 0;position:relative} .figure img{border:2px solid var(--ink);border-radius:10px;box-shadow:4px 5px 0 rgba(33,48,62,.12);background:#fff} .figure figcaption{font-family:var(--font-zhand);font-size:17px;color:var(--ink2);margin-top:9px;text-align:center} .toc{background:var(--card);border:2px dashed var(--line);border-radius:12px;padding:16px 20px;margin:24px 0} .toc strong{font-family:var(--font-zhand);font-size:18px;color:var(--pen-red);font-weight:400} .toc ol{margin:8px 0 0;padding-left:22px} .toc li{margin:4px 0} .prose{font-size:17px;line-height:1.95;color:#2a3845} .prose h2{font-size:25px;font-weight:900;margin:38px 0 12px;line-height:1.3;position:relative;padding-left:2px} .prose h2 .n{font-family:var(--font-hand);color:var(--pen-red);margin-right:8px} .prose h3{font-size:20px;font-weight:800;margin:26px 0 8px} .prose p{margin:14px 0} .prose ul,.prose ol{margin:14px 0;padding-left:24px} .prose li{margin:7px 0} .prose strong{color:var(--ink)} .prose blockquote{margin:20px 0;padding:6px 18px;border-left:4px solid var(--amber);background:rgba(255,200,58,.09); color:var(--ink2);border-radius:0 8px 8px 0} .prose code{font-family:var(--font-mono);font-size:.92em;background:#fff;border:1px solid var(--line);border-radius:5px;padding:1px 6px} .prose a{color:var(--pen-blue);font-weight:600;text-decoration:underline;text-decoration-color:var(--amber);text-underline-offset:3px} .tbl{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px;background:var(--card);border:2px solid var(--ink);border-radius:10px;overflow:hidden} .tbl th,.tbl td{padding:10px 12px;border-top:1px solid var(--line);text-align:left;vertical-align:top} .tbl th{background:rgba(33,48,62,.05);font-size:13px;color:var(--ink2)} .cta-inline{margin:26px 0;padding:20px;background:var(--sticky);border:2px solid var(--ink);border-radius:12px; box-shadow:3px 4px 0 rgba(33,48,62,.13);display:flex;flex-wrap:wrap;align-items:center;gap:12px 18px;justify-content:space-between} .cta-inline .ci-code{font-family:var(--font-mono);font-weight:700;font-size:20px;letter-spacing:2px} /* author box / related */ .authorbox{display:flex;gap:14px;align-items:flex-start;margin:34px 0;padding:18px;background:var(--card); border:2px solid var(--ink);border-radius:12px;box-shadow:3px 3px 0 rgba(33,48,62,.1)} .authorbox .av{width:52px;height:52px;border-radius:50%;border:2px solid var(--ink);flex:none;background:var(--amber-soft);display:grid;place-items:center;font-family:var(--font-hand);font-size:24px} .related{margin:30px 0} .related h2{font-size:20px;font-weight:800;margin:0 0 12px} /* ---------- tools ---------- */ .tool{max-width:720px;margin:0 auto;padding:8px 0 44px} .tool h1{font-size:32px;font-weight:900;margin:12px 0 8px} .tool .lead{color:var(--ink2);font-size:16px;margin:0 0 22px} .panel{background:var(--card);border:2px solid var(--ink);border-radius:14px;padding:22px;box-shadow:4px 5px 0 rgba(33,48,62,.13)} .field{margin:14px 0} .field label{display:block;font-weight:700;font-size:14px;margin-bottom:6px} .field .hint{font-weight:400;color:var(--ink3);font-size:13px} .input,select.input{width:100%;font:inherit;font-size:17px;color:var(--ink);background:#fff;border:2px solid var(--ink); border-radius:10px;padding:11px 13px;box-shadow:inset 1px 1px 0 rgba(33,48,62,.05)} .input:focus,select.input:focus{outline:none;box-shadow:0 0 0 3px var(--amber)} .row{display:flex;gap:12px;flex-wrap:wrap}.row>*{flex:1;min-width:140px} .seg{display:flex;gap:8px;flex-wrap:wrap} .seg button{flex:1;min-width:80px;font:inherit;font-weight:700;border:2px solid var(--ink);background:#fff;color:var(--ink); border-radius:9px;padding:9px;cursor:pointer} .seg button.on{background:var(--amber);box-shadow:2px 2px 0 var(--ink)} .result{margin-top:20px;padding:20px;border-radius:14px;background:var(--ink);color:#fff;position:relative;overflow:hidden} .result .rlabel{font-size:13px;letter-spacing:1px;color:#aebccb;text-transform:uppercase} .result .big{font-family:var(--font-mono);font-weight:700;font-size:42px;line-height:1.1;margin:4px 0 2px} .result .big.red{color:#ff7b72} .result .big.green{color:#56d6a0} .result .sub{color:#c4cfdb;font-size:14px} .result .breakdown{margin-top:14px;border-top:1px solid rgba(255,255,255,.16);padding-top:12px;font-size:14px} .result .breakdown div{display:flex;justify-content:space-between;padding:3px 0;color:#d6dee7} .result .breakdown b{color:#fff} .bar{height:14px;border-radius:8px;background:rgba(255,255,255,.14);overflow:hidden;margin:8px 0} .bar>i{display:block;height:100%;background:var(--amber)} .gauge{display:flex;gap:4px;margin:10px 0} .gauge span{flex:1;height:10px;border-radius:3px;background:rgba(255,255,255,.18)} .checklist{list-style:none;padding:0;margin:0} .checklist li{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-top:1px solid var(--line)} .checklist li:first-child{border-top:none} .checklist input{width:22px;height:22px;flex:none;margin-top:2px;accent-color:var(--pen-teal)} .toolnote{font-size:13px;color:var(--ink3);margin-top:16px;line-height:1.6} /* ---------- footer ---------- */ .site-foot{margin-top:30px;border-top:2px solid var(--ink);background:rgba(33,48,62,.03)} .foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px;padding:38px 0 22px} .foot-grid h4{font-size:14px;font-weight:800;margin:0 0 10px;color:var(--ink)} .foot-grid a{display:block;color:var(--ink2);font-size:13.5px;padding:3px 0} .foot-brand .logo{font-size:24px} .foot-brand p{color:var(--ink2);font-size:13px;line-height:1.7;margin:10px 0 0;max-width:30ch} .foot-bottom{border-top:1px solid var(--line);padding:16px 0;font-size:12.5px;color:var(--ink3);display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between} .disc{background:var(--warn-bg);border-top:1px solid var(--amber-deep);font-size:12.5px;color:#6b5a25;line-height:1.7;padding:14px 0} /* ---------- hero ---------- */ .hero{display:grid;grid-template-columns:1.15fr .85fr;gap:8px 40px;align-items:start; grid-template-areas:"head convert" "rest convert";padding:26px 0 50px;position:relative} .hero-head{grid-area:head} .hero-rest{grid-area:rest} .convert{grid-area:convert} .hero h1{font-size:45px;line-height:1.22;font-weight:900;margin:14px 0 4px;letter-spacing:.5px} .hero .sub{font-size:17px;line-height:1.85;color:var(--ink2);max-width:31em;margin:16px 0 0} .hero .sub b{color:var(--ink);font-weight:700} .startnote{position:absolute;left:50.5%;top:118px;font-family:var(--font-zhand);font-size:21px;color:var(--pen-red);transform:rotate(-7deg);z-index:3} .arrowbig{position:absolute;left:50.3%;top:146px;width:128px;height:118px;z-index:3;pointer-events:none} .phone{position:relative;margin:24px auto 0;width:180px} .phone .pnote{position:absolute;right:-54px;top:46px;font-family:var(--font-zhand);font-size:17px;color:var(--pen-teal);transform:rotate(5deg);width:118px;line-height:1.3} /* ---------- responsive ---------- */ @media (max-width:980px){ .g3,.g4{grid-template-columns:repeat(2,1fr)} .foot-grid{grid-template-columns:1fr 1fr} } @media (max-width:880px){ .hero{grid-template-columns:1fr;grid-template-areas:"head" "convert" "rest";gap:10px;padding:14px 0 36px} .hero h1{font-size:36px} .convert{margin-top:6px} .hero-rest{margin-top:16px} .phone,.arrowbig,.startnote{display:none} .nav{display:none} .article h1{font-size:30px} .prose{font-size:16px} } @media (max-width:560px){ .g3,.g2,.g4{grid-template-columns:1fr} .foot-grid{grid-template-columns:1fr 1fr;gap:18px} .wrap{padding:0 16px} .section{padding:34px 0} } @media (max-width:380px){ .hero h1{font-size:28px;line-height:1.26} .code{font-size:23px;letter-spacing:2px} .result .big{font-size:34px} .foot-grid{grid-template-columns:1fr} } @media (prefers-reduced-motion:reduce){*{transition:none!important}}