:root{--brand:#2e5bff;--brand-dark:#1e44d6;--brand-2:#6e85ff;--brand-1:#d9e0ff;--brand-0:#eef1fe;--accent:#00c2a8;--en-orange:#ff9e5e;--en-orange-deep:#e06a2f;--en-orange-soft:#f5c49b;--en-coal-0:#fff3e8;--ink:#101733;--ink-2:#3d4560;--text-2:#7c86a0;--text-3:#99a2b8;--line:#e6eaf3;--line-2:#d8ddea;--line-strong:#c7d0e4;--paper:#fff;--paper-2:#f6f8fb;--paper-3:#eff2f7;--ok:#00a870;--ok-bg:#f0fbf6;--ok-line:#c4efdc;--ok-text:#00795a;--warn:#d54941;--warn-bg:#fff4f3;--warn-line:#ffd9d5;--warn-text:#b3322d;--radius:12px;--radius-lg:16px;--shadow:0 1px 2px #1017330a, 0 6px 20px #1017330f;--shadow-lg:0 8px 22px #10173314, 0 20px 48px #1017331a;--maxw:1200px;--font-num:"DIN Alternate", "Bahnschrift", -apple-system, "PingFang SC", sans-serif;--grad-brand:linear-gradient(135deg, #2e5bff, #6e85ff 60%, #00c2a8 130%);--grad-hero:linear-gradient(155deg, #0e1633, #15255c 46%, #1e3a8f)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;line-height:1.7}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}ol,ul{list-style:none}button{font-family:inherit}svg{display:block}.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}.hd{z-index:60;-webkit-backdrop-filter:saturate(180%)blur(14px);border-bottom:1px solid var(--line);background:#ffffffe0;position:sticky;top:0}.hd-in{justify-content:space-between;height:64px}.hd-in,.logo{align-items:center;display:flex}.logo{letter-spacing:.5px;color:var(--ink);gap:10px;font-size:21px;font-weight:800}.logo-mark{background:var(--grad-brand);border-radius:9px;flex:none;justify-content:center;align-items:center;width:34px;height:34px;display:flex;box-shadow:0 4px 12px #2e5bff4d}.logo-mark svg{stroke:#fff;width:20px;height:20px}.logo b{color:inherit;font-weight:inherit}.logo .en{color:var(--text-3);letter-spacing:1px;margin-left:2px;font-size:12px;font-weight:600}.nav{align-items:center;gap:2px;display:flex}.nav a{color:var(--text-2);border-radius:6px;padding:8px 14px;font-size:15px;transition:all .2s}.nav a:hover{color:var(--brand);background:var(--brand-0)}.nav .btn-sm{background:var(--brand);color:#fff;border-radius:6px;margin-left:10px;padding:9px 18px;font-weight:600}.nav .btn-sm:hover{background:var(--brand-dark);box-shadow:0 4px 14px #2e5bff4d}.nav-fb{cursor:pointer;color:var(--text-2);background:0 0;border:none;border-radius:6px;padding:8px 14px;font-family:inherit;font-size:15px;line-height:1.2;transition:all .2s}.nav-fb:hover{color:var(--brand);background:var(--brand-0)}.nav-zone{font-weight:600;color:var(--en-orange)!important}.nav-zone:hover{background:var(--en-coal-0);color:var(--en-orange-deep)!important}.burger{border:1px solid var(--line-2);cursor:pointer;background:#fff;border-radius:9px;width:42px;height:42px;display:none;position:relative}.burger span{background:var(--ink);width:20px;height:2px;transition:all .25s;position:absolute;left:11px}.burger span:first-child{top:14px}.burger span:nth-child(2){top:20px}.burger span:nth-child(3){top:26px}.burger.on span:first-child{transform:translateY(6px)rotate(45deg)}.burger.on span:nth-child(2){opacity:0}.burger.on span:nth-child(3){transform:translateY(-6px)rotate(-45deg)}.mnav{border-top:1px solid var(--line);background:#fff;padding:8px 20px 18px;display:none}.mnav a,.mnav.on{display:block}.mnav a{color:var(--text-2);border-bottom:1px solid var(--line);padding:13px 4px;font-size:16px}.mnav .btn-sm{background:var(--brand);text-align:center;color:#fff;border:none;border-radius:8px;margin-top:14px;font-weight:600}.mnav-fb{cursor:pointer;text-align:left;width:100%;color:var(--text-2);border:none;border-bottom:1px solid var(--line);background:0 0;padding:13px 4px;font-family:inherit;font-size:16px;line-height:1.2;display:block}.hero{background:var(--grad-hero);color:#fff;padding:84px 0 0;position:relative;overflow:hidden}.hero:before{background:radial-gradient(700px 340px at 82% 8%,#00c2a838,#00c2a800 62%),radial-gradient(620px 340px at 10% 94%,#6e85ff4d,#6e85ff00 60%)}.hero:after,.hero:before{content:"";position:absolute;inset:0}.hero:after{opacity:.8;background-image:linear-gradient(#ffffff0d 1px,#0000 0),linear-gradient(90deg,#ffffff0d 1px,#0000 0);background-size:52px 52px;-webkit-mask-image:radial-gradient(circle at 50% 24%,#000 16%,#0000 72%);mask-image:radial-gradient(circle at 50% 24%,#000 16%,#0000 72%)}.hero-in{z-index:2;text-align:center;max-width:860px;margin:0 auto;position:relative}.badge{color:#ffffffd1;-webkit-backdrop-filter:blur(6px);background:#ffffff14;border:1px solid #ffffff29;border-radius:99px;align-items:center;gap:8px;margin-bottom:22px;padding:6px 14px;font-size:13px;display:inline-flex}.badge svg{width:12px;height:12px;color:var(--accent)}.dot{background:var(--accent);border-radius:50%;width:7px;height:7px;box-shadow:0 0 12px #00c2a8cc}h1{letter-spacing:-.5px;color:#fff;font-size:52px;font-weight:800;line-height:1.18}h1 em{color:inherit;font-style:normal}.slogan{color:#ffffffbd;margin-top:18px;font-size:20px;font-weight:500}.slogan strong{color:#fff}.stats{-webkit-backdrop-filter:blur(6px);background:#ffffff0f;border:1px solid #ffffff24;border-radius:14px;flex-wrap:wrap;justify-content:center;max-width:680px;margin-top:30px;margin-left:auto;margin-right:auto;display:flex;overflow:hidden}.stats>div{border-right:1px solid #ffffff1a;flex:1 1 0;min-width:130px;padding:15px 10px}.stats>div:last-child{border-right:none}.stats .n{font-family:var(--font-num);color:#fff;font-variant-numeric:tabular-nums;font-size:25px;font-weight:700;line-height:1.2}.stats .n small{color:var(--accent);margin-left:2px;font-size:13px;font-weight:600}.stats .l{color:#ffffff9e;margin-top:2px;font-size:12.5px}.cta-btns{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:30px;display:flex}.btn{background:var(--brand);color:#fff;border-radius:8px;padding:14px 36px;font-size:16px;font-weight:600;transition:all .2s;display:inline-block;box-shadow:0 8px 26px #2e5bff6b}.btn:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 12px 32px #2e5bff7a}.btn.ghost{color:#fff;box-shadow:none;background:#ffffff0a;border:1px solid #ffffff52}.btn.ghost:hover{box-shadow:none;background:#ffffff1f;border-color:#ffffff8c;transform:translateY(-2px)}section{padding:88px 0}.sec-head{text-align:center;max-width:720px;margin:0 auto 52px}.eyebrow{letter-spacing:.18em;color:var(--brand);margin-bottom:12px;font-size:12.5px;font-weight:700;display:inline-block}h2{letter-spacing:-.4px;color:var(--ink);font-size:38px;font-weight:800;line-height:1.3}.sec-head p{color:var(--text-2);margin-top:14px;font-size:17px}.grid-4{grid-template-columns:repeat(4,1fr);gap:20px;display:grid}.grid-3{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.tool-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px 26px;transition:all .25s;display:block}.tool-card:hover{box-shadow:var(--shadow-lg);border-color:var(--brand-1);transform:translateY(-5px)}.ico{width:50px;height:50px;color:var(--brand);background:linear-gradient(135deg,#2e5bff1a,#00c2a81f);border-radius:12px;justify-content:center;align-items:center;margin-bottom:18px;display:flex}.ico svg{width:25px;height:25px}.tool-card h3{color:var(--ink);margin-bottom:9px;font-size:19px;font-weight:700}.tool-card p{color:var(--text-2);font-size:15px;line-height:1.65}.tool-card .more{color:var(--brand);align-items:center;gap:4px;margin-top:14px;font-size:14px;font-weight:600;display:flex}.tool-card .more svg{width:14px;height:14px}.chips{flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:36px;display:flex}.chips button{border:1px solid var(--line-2);color:var(--ink-2);cursor:pointer;background:#fff;border-radius:99px;padding:9px 20px;font-size:14px;transition:all .18s}.chips button:hover{border-color:var(--brand-2);color:var(--brand)}.chips button.on{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;box-shadow:0 6px 16px #2e5bff4d}.faq{max-width:780px;margin:0 auto}.faq details{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;margin-bottom:10px;overflow:hidden}.faq summary{cursor:pointer;color:var(--ink);justify-content:space-between;align-items:center;gap:12px;padding:15px 18px;font-size:15px;font-weight:600;list-style:none;display:flex}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--accent);font-size:20px;font-weight:400;line-height:1;transition:transform .2s}.faq details[open] summary:after{transform:rotate(45deg)}.faq p{color:var(--text-2);padding:0 18px 16px;font-size:14px;line-height:1.8}.fb-sec{background:linear-gradient(180deg,#fff 0,var(--paper-2) 100%)}.fb-banner{background:var(--grad-hero);color:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:24px;margin-bottom:22px;padding:26px 30px;display:flex;position:relative;overflow:hidden}.fb-banner:before{content:"";background:radial-gradient(360px 200px at 88% 10%,#00c2a840,#00c2a800 60%);position:absolute;inset:0}.fb-banner-txt{z-index:1;max-width:760px;position:relative}.fb-banner-txt b{font-size:19px;font-weight:700;display:block}.fb-banner-txt p{color:#ffffffb8;margin-top:6px;font-size:14px;line-height:1.7}.fb-btn{z-index:1;background:var(--brand);color:#fff;border-radius:8px;flex:none;align-items:center;gap:4px;padding:12px 24px;font-size:15px;font-weight:600;transition:all .2s;display:inline-flex;position:relative;box-shadow:0 8px 22px #00000038}.fb-btn:hover{background:var(--brand-dark);transform:translateY(-2px)}.fb-btn svg{width:15px;height:15px}.fb-wall{flex-direction:column;gap:10px;display:flex}.fb-item{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;align-items:flex-start;gap:14px;padding:16px 18px;transition:all .2s;display:flex}.fb-item:hover{border-color:var(--brand-1)}.fb-status{border-radius:99px;flex:none;padding:3px 10px;font-size:12px;font-weight:700;line-height:1.6}.fb-status.done{background:var(--ok-bg);color:var(--ok-text);border:1px solid var(--ok-line)}.fb-status.doing{background:var(--brand-0);color:var(--brand-dark);border:1px solid var(--brand-1)}.fb-status.plan{color:#b06b08;background:#fff7e8;border:1px solid #ffe3b8}.fb-status.heard{background:var(--paper-3);color:var(--text-2);border:1px solid var(--line-2)}.fb-bd{flex:auto;min-width:0}.fb-title{color:var(--ink);flex-wrap:wrap;align-items:center;gap:8px;font-size:15px;font-weight:700;display:flex}.fb-cat{color:var(--text-3);background:var(--paper-2);border:1px solid var(--line);border-radius:5px;padding:1px 7px;font-size:11.5px;font-weight:500}.fb-result{color:var(--text-2);margin-top:5px;font-size:13px;line-height:1.7}.fb-date{font-variant-numeric:tabular-nums;flex:none;padding-top:4px;font-size:12px}.fb-date,.fb-empty{color:var(--text-3)}.fb-empty{padding:40px 0;font-size:14px}.fb-empty,.fb-qr{text-align:center}.fb-qr{cursor:zoom-in;box-shadow:var(--shadow);background:#fff;border-radius:12px;flex:none;padding:10px 10px 8px;transition:all .2s}.fb-qr:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.fb-qr img{-o-object-fit:contain;object-fit:contain;border-radius:8px;width:auto;max-width:170px;height:190px;margin:0 auto;display:block}.fb-qr p{color:var(--text-2);margin-top:8px;font-size:12px}.fb-qr-missing{border:1.5px dashed var(--brand-2);background:var(--brand-0);width:148px;height:190px;color:var(--brand);border-radius:8px;flex-direction:column;justify-content:center;align-items:center;gap:6px;display:flex}.fb-qr-missing svg{opacity:.55;width:30px;height:30px}.fb-qr-missing small{color:var(--text-3);font-size:11px}.fb-modal{z-index:200;-webkit-backdrop-filter:blur(3px);background:#0e16339e;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.fb-modal-box{border-radius:var(--radius-lg);text-align:center;width:320px;max-width:100%;box-shadow:var(--shadow-lg);background:#fff;padding:22px 24px 20px;animation:.22s fbPop}@keyframes fbPop{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}.fb-modal-hd{color:var(--ink);justify-content:center;align-items:center;gap:8px;margin-bottom:14px;font-size:16px;font-weight:700;display:flex}.fb-modal-x{background:var(--paper-2);color:var(--text-3);cursor:pointer;border:none;border-radius:6px;width:26px;height:26px;margin-left:auto;font-size:16px;line-height:1}.fb-modal-x:hover{color:var(--warn);background:var(--warn-bg)}.fb-modal-box img{-o-object-fit:contain;object-fit:contain;width:auto;max-width:100%;display:block}.fb-modal-box img,.fb-modal-missing{border-radius:10px;height:280px;margin:0 auto}.fb-modal-missing{border:1.5px dashed var(--brand-2);background:var(--brand-0);color:var(--brand);justify-content:center;align-items:center;font-size:14px;display:flex}.fb-modal-tip{color:var(--text-3);margin-top:12px;font-size:12.5px}.grid-3.steps .tool-card{text-align:center;padding:34px 24px}.step-no{background:var(--grad-brand);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;margin:0 auto 16px;font-size:16px;font-weight:800;display:flex;box-shadow:0 6px 16px #2e5bff4d}.channel-sec{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.ch-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.ch-card{border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);background:#fff;align-items:flex-start;gap:20px;padding:26px;transition:all .25s;display:flex}.ch-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.ch-qr{flex:0 0 118px}.ch-qr img{border:1.6px solid var(--line);-o-object-fit:contain;object-fit:contain;background:#fff;display:block}.ch-qr .box,.ch-qr img{border-radius:12px;width:118px;height:118px}.ch-qr .box{border:1.6px dashed var(--brand-2);background:var(--brand-0);color:var(--brand);flex-direction:column;justify-content:center;align-items:center;gap:6px;display:flex}.ch-qr .box svg{opacity:.55;width:26px;height:26px}.ch-qr .box small{color:var(--text-3);font-size:10.5px}.ch-bd h3{align-items:center;gap:8px;font-size:18px;font-weight:700;display:flex}.ch-bd h3 svg{width:19px;height:19px;color:var(--brand)}.ch-bd p{color:var(--text-2);margin-top:8px;font-size:14px;line-height:1.7}.ch-bd .handle{color:var(--brand);margin-top:10px;font-size:13px;font-weight:600}.tool-page{padding:44px 0 88px}.crumbs{color:var(--text-3);margin-bottom:18px;font-size:13.5px}.crumbs a:hover{color:var(--brand)}.crumbs b{color:var(--ink);font-weight:600}.tool-head{align-items:center;gap:16px;margin-bottom:10px;display:flex}.tool-head .ico{flex:none;margin-bottom:0}.tool-head h1{color:var(--ink);font-size:30px}.tool-sub{color:var(--text-2);margin-bottom:34px;font-size:15.5px}.wb{grid-template-columns:minmax(0,1fr) 400px;align-items:start;gap:26px;display:grid}.wb-main{min-width:0}.wb-side{position:sticky;top:84px}.card{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;margin-bottom:14px;overflow:hidden}.card-h{border-bottom:1px solid var(--line);align-items:center;gap:8px;padding:13px 16px 11px;display:flex}.card-h .bar{background:var(--brand);border-radius:2px;width:3px;height:14px}.card-h b{font-size:14.5px;font-weight:700}.card-b{padding:6px 16px 16px}.fld{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding:12px 0;display:flex}.fld:last-child{border-bottom:none}.fld label{color:var(--ink-2);flex:none;min-width:96px;font-size:14px}.fld .ipt{flex:1;justify-content:flex-end;align-items:baseline;gap:6px;min-width:0;display:flex}.fld input{text-align:right;width:100%;color:var(--ink);font-size:16px;font-weight:600;font-family:var(--font-num);font-variant-numeric:tabular-nums;background:0 0;border:none;outline:none;min-width:0}.fld input::placeholder{color:#c4ccd9;font-family:-apple-system,PingFang SC,sans-serif;font-weight:400}.fld input:focus{color:var(--brand-dark)}.fld .u{flex:none;min-width:30px;font-size:12.5px}.fld .u,.hint{color:var(--text-3);text-align:right}.hint{padding:0 0 6px;font-size:11.5px}.seg{background:var(--paper-2);border-radius:9px;flex-wrap:wrap;flex:1;gap:2px;padding:3px;display:flex}.seg button{cursor:pointer;color:var(--text-2);white-space:nowrap;background:0 0;border:none;border-radius:7px;flex:1;padding:8px 4px;font-size:13px;transition:all .15s}.seg button.on{color:var(--brand);background:#fff;font-weight:700;box-shadow:0 1px 3px #1017331a}.result-panel{border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);background:#fff;overflow:hidden}.result-panel .rp-h{border-bottom:1px solid var(--line);align-items:center;gap:8px;padding:13px 18px;font-size:14.5px;font-weight:700;display:flex}.result-panel .rp-h .bar{background:var(--brand);border-radius:2px;width:3px;height:14px}.rp-b{padding:16px 18px 18px}.result{background:linear-gradient(135deg,#2e5bff0f,#00c2a812);border:1px solid #2e5bff29;border-radius:12px;padding:15px 16px}.res-label{color:var(--text-2);margin-bottom:5px;font-size:12px}.res-main{flex-wrap:wrap;align-items:baseline;gap:7px;display:flex}.res-main .v{font-family:var(--font-num);color:var(--ink);letter-spacing:-.5px;font-variant-numeric:tabular-nums;font-size:38px;font-weight:700;line-height:1.1}.res-main .u{color:var(--brand);font-size:13px;font-weight:600}.res-sub{border-top:1px dashed #2e5bff33;flex-direction:column;gap:8px;margin-top:13px;padding-top:13px;display:flex}.res-sub div{color:var(--text-2);border:1px solid var(--line);background:#ffffffd9;border-radius:7px;padding:6px 10px;font-size:12.5px;line-height:1.5}.res-sub b{color:var(--ink);font-variant-numeric:tabular-nums;font-weight:700;font-family:var(--font-num)}.warnbox{background:var(--warn-bg);border:1px solid var(--warn-line);color:var(--warn-text);border-radius:10px;gap:8px;margin:12px 0 0;padding:10px 12px;font-size:12.5px;line-height:1.65;display:flex}.warnbox svg{width:14px;height:14px;color:var(--warn);flex:none;margin-top:3px}.warnbox.ok{background:var(--ok-bg);border-color:var(--ok-line);color:var(--ok-text)}.warnbox.ok svg{color:var(--ok)}.tbl{border-collapse:collapse;width:100%;margin-top:12px;font-size:13px}.tbl td,.tbl th{text-align:right;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums;padding:9px 6px}.tbl th{color:var(--text-3);background:var(--paper-2);font-size:11.5px;font-weight:600}.tbl td:first-child,.tbl th:first-child{text-align:left;color:var(--ink-2);font-weight:600}.tbl tr:last-child td{border-bottom:none}.tbl .hl{color:var(--brand);font-weight:700;font-family:var(--font-num)}.formula{background:var(--paper-2);border:1px solid var(--line);color:var(--text-2);border-radius:10px;margin-top:14px;padding:12px 13px;font-size:12.5px;line-height:1.85}.formula b{color:var(--ink);font-weight:700}.formula code{border:1px solid var(--line-2);color:var(--brand-dark);padding:1px 6px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11.5px}.formula .gd,.formula code{background:#fff;border-radius:5px}.formula .gd{color:var(--text-3);border:1px solid var(--line);margin-top:8px;padding:1px 7px;font-size:11px;display:inline-block}.disclaim{text-align:center;color:var(--text-3);padding:18px 20px 0;font-size:12.5px;line-height:1.8}.disclaim b{color:var(--text-2)}.tool-nav{grid-template-columns:1fr 1fr;gap:14px;margin-top:34px;display:grid}.tool-nav a{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:14px 16px;transition:all .2s}.tool-nav a:hover{border-color:var(--brand-1);box-shadow:var(--shadow)}.tool-nav small{color:var(--text-3);font-size:12px;display:block}.tool-nav b{color:var(--brand);font-size:15px}.tool-nav .next{text-align:right}.rec{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;gap:12px;margin-bottom:10px;padding:14px 16px}.rec,.rec .av{align-items:center;display:flex}.rec .av{width:40px;height:40px;color:var(--brand);background:linear-gradient(135deg,#2e5bff1a,#00c2a81f);border-radius:10px;flex:none;justify-content:center;font-size:15px;font-weight:800}.rec .mid{flex:1;min-width:0}.rec .mid b{font-size:15px;font-weight:700;display:block}.rec .mid small{color:var(--text-3);margin-top:2px;font-size:12px;display:block}.rec .rt{text-align:right;flex:none}.rec .rt b{color:var(--ink);font-variant-numeric:tabular-nums;font-size:17px;font-weight:700;font-family:var(--font-num)}.rec .rt small{color:var(--text-3);margin-top:1px;font-size:11px;display:block}.rec .del{color:#c4ccd9;cursor:pointer;background:0 0;border:none;padding:0 4px;font-size:19px;line-height:1}.rec .del:hover{color:var(--warn)}.addbtn{border:1.5px dashed var(--brand-2);width:100%;color:var(--brand);cursor:pointer;background:#fff;border-radius:11px;padding:14px;font-size:14.5px;font-weight:600;transition:all .16s}.addbtn:hover{background:var(--brand-0)}.btn-row{gap:10px;padding:0 0 14px;display:flex}.calcbtn{background:var(--brand);color:#fff;cursor:pointer;border:none;border-radius:10px;width:100%;padding:13px;font-size:15px;font-weight:600;transition:all .16s}.calcbtn:hover{background:var(--brand-dark)}.calcbtn.plain{color:var(--text-2);border:1px solid var(--line-2);background:#fff}.empty{text-align:center;color:var(--text-3);padding:52px 20px}.empty svg{opacity:.3;width:46px;height:46px;margin:0 auto 12px}.empty p{font-size:13.5px}.doc-page{padding:44px 0 88px}.doc{border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);color:var(--ink-2);background:#fff;max-width:860px;margin:0 auto;padding:28px 30px;font-size:14px;line-height:1.95}.doc h1{color:var(--ink);margin-bottom:6px;font-size:26px}.doc .eff{color:var(--text-3);margin-bottom:18px;font-size:12.5px}.doc h4{color:var(--ink);margin:20px 0 7px;font-size:15.5px;font-weight:700}.doc p{margin-bottom:8px}.doc ul{margin:0 0 8px 20px;list-style:outside}.doc li{margin-bottom:4px}footer{color:#8d97b5;background:#0e1633;padding:60px 0 0;font-size:14.5px}.f-grid{grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;display:grid}footer .logo{color:#fff}footer .logo .en{color:#8d97b5}footer .logo-mark{box-shadow:none}footer h4{color:#fff;margin-bottom:16px;font-size:15px;font-weight:700}footer ul li{margin-bottom:11px}footer a{transition:color .2s}footer a:hover{color:#fff}.f-about p{max-width:320px}.f-about p,.f-note{margin-top:14px;line-height:1.8}.f-note{color:#6b7590;font-size:12.5px}.f-bot{color:#6b7590;border-top:1px solid #ffffff1a;justify-content:space-between;margin-top:44px;padding:22px 0 30px;font-size:13px}.f-bot,.f-bot-right{flex-wrap:wrap;gap:10px;display:flex}.f-bot-right{align-items:center}.beian-link{color:#6b7590;text-decoration:none;transition:color .2s}.beian-link:hover{color:#fff}.float{z-index:80;flex-direction:column;gap:10px;display:flex;position:fixed;bottom:26px;right:18px}.float a{background:var(--paper);border:1px solid var(--line);width:48px;height:48px;color:var(--brand);border-radius:50%;justify-content:center;align-items:center;display:flex;box-shadow:0 8px 24px #1017331f}.float a svg{width:21px;height:21px}.float .top{background:var(--brand);color:#fff;border-color:#0000;box-shadow:0 8px 22px #2e5bff57}.rv{opacity:0;transition:opacity .6s,transform .6s;transform:translateY(22px)}.rv.in{opacity:1;transform:none}@media (width<=1024px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}.ch-grid{grid-template-columns:1fr}.f-grid{grid-template-columns:1fr 1fr;gap:32px}h1{font-size:42px}h2{font-size:32px}.wb{grid-template-columns:1fr}.wb-side{position:static}}@media (width<=768px){.nav{display:none}.burger{display:block}.wrap{padding:0 18px}section{padding:60px 0}.hero{padding:52px 0 0}h1{font-size:33px}.slogan{font-size:17px}.tool-head h1{font-size:25px}.grid-3,.grid-3.steps,.grid-4{grid-template-columns:1fr}.sec-head{margin-bottom:34px}h2{font-size:27px}.tool-card{padding:26px 22px}.tool-nav{grid-template-columns:1fr}.tool-nav .next{text-align:left}.doc{padding:22px 20px}.ch-card{flex-direction:column}.btn{text-align:center;width:100%}.cta-btns{flex-direction:column;align-items:stretch;padding:0 8px}.stats{margin-left:8px;margin-right:8px}.stats>div{border-bottom:1px solid #ffffff1a;min-width:40%}.f-grid{grid-template-columns:1fr;gap:26px}.float{bottom:16px;right:12px}.float a{width:44px;height:44px}}@media (width<=380px){h1{font-size:29px}}@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}.rv{opacity:1;transform:none}}