:root{--blue:#2855d9;--blue-dark:#18338e;--blue-soft:#edf3ff;--ink:#202533;--muted:#667085;--line:#e3e8f1;--bg:#f5f7fb;--white:#fff;--green:#16a06a;--red:#d73b4d;--shadow:0 10px 35px rgba(35,53,94,.09);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}body{margin:0;min-width:320px;background:var(--bg);line-height:1.6}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.site-header{height:72px;background:rgba(255,255,255,.95);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(14px)}.header-inner{height:100%;max-width:1180px;margin:auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px}.brand img{filter:drop-shadow(0 4px 7px rgba(40,85,217,.2))}.local-pill{font-size:13px;color:#377457;background:#effaf5;padding:7px 12px;border-radius:99px;border:1px solid #cfecdf}.local-pill i{display:inline-block;width:7px;height:7px;background:#26b475;border-radius:50%;margin-right:7px}.hero{background:linear-gradient(135deg,#f8fbff 0%,#eef3ff 54%,#f7f0ff 100%);border-bottom:1px solid #e0e7f6}.hero-inner{max-width:1180px;min-height:330px;margin:auto;padding:62px 24px;display:flex;align-items:center;justify-content:space-between;gap:40px}.hero h1{font-size:clamp(34px,5vw,56px);line-height:1.15;letter-spacing:-2px;margin:10px 0 18px}.hero p{font-size:18px;color:var(--muted);max-width:670px}.eyebrow{font-size:12px;font-weight:800;letter-spacing:1.8px;color:var(--blue)}.hero-points{display:flex;gap:22px;flex-wrap:wrap;margin-top:26px;color:#4d5d7a;font-size:14px}.hero-points span::first-letter{color:var(--green)}.hero-mark{width:210px;height:210px;border-radius:42px;background:rgba(255,255,255,.7);display:grid;place-items:center;box-shadow:var(--shadow);transform:rotate(3deg)}.tools-section{max-width:1180px;margin:auto;padding:58px 24px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:26px}.section-heading h2{font-size:30px;margin:6px 0 0}.section-heading p{color:var(--muted);font-size:14px}.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.tool-card{background:var(--white);border:1px solid var(--line);border-radius:14px;min-height:118px;padding:20px;display:grid;grid-template-columns:52px 1fr auto;gap:15px;align-items:center;transition:.2s ease}.tool-card:hover{transform:translateY(-3px);border-color:#bdcaf1;box-shadow:var(--shadow)}.tool-card strong{display:block;font-size:17px;margin-bottom:4px}.tool-card small{display:block;color:var(--muted);line-height:1.5}.tool-card b{font-size:25px;color:#a5afc1;font-weight:400}.icon-box{width:52px;height:52px;border-radius:13px;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center}.icon-box:nth-child(4n){background:#fff1ed}.tool-icon{width:27px;height:27px}.icon-box.large{width:68px;height:68px;border-radius:18px}.icon-box.large .tool-icon{width:36px;height:36px}.privacy-banner{max-width:1132px;margin:0 auto 65px;padding:28px 32px;background:#192757;color:white;border-radius:18px;display:flex;align-items:center;gap:22px}.privacy-banner h2{margin:0 0 5px}.privacy-banner p{margin:0;color:#cdd6fb}.privacy-lock{width:58px;height:58px;border-radius:16px;background:#2d4290;display:grid;place-items:center}.privacy-lock .tool-icon{width:33px;height:33px}.site-footer{background:#fff;border-top:1px solid var(--line);color:var(--muted)}.site-footer>div{max-width:1180px;margin:auto;padding:38px 24px;display:grid;grid-template-columns:auto 1fr auto;gap:25px;align-items:center}.site-footer strong{color:var(--ink)}.site-footer p{margin:0}.site-footer nav{display:flex;gap:18px}.site-footer a:hover{color:var(--blue)}.tool-main,.text-page{max-width:1060px;margin:auto;padding:34px 24px 70px}.breadcrumb{display:flex;gap:9px;color:var(--muted);font-size:14px;margin-bottom:28px}.breadcrumb a:hover{color:var(--blue)}.tool-heading{display:flex;gap:20px;align-items:center;margin-bottom:22px}.tool-heading h1{font-size:38px;line-height:1.2;margin:5px 0}.tool-heading p{color:var(--muted);margin:0}.local-notice{display:flex;align-items:center;gap:15px;padding:14px 18px;border:1px solid #ccebdc;background:#f1fbf6;border-radius:12px;margin-bottom:18px;color:#47715c}.local-notice strong{color:#167249}.workspace,.stamp-workspace{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:var(--shadow)}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-bottom:22px}.form-grid label,.stamp-workspace label{font-size:14px;font-weight:650;color:#3c465a}.form-grid input,.form-grid select,.stamp-workspace input,.stamp-workspace select{display:block;width:100%;margin-top:7px;border:1px solid #cfd6e4;border-radius:10px;padding:11px 12px;background:#fff;color:var(--ink)}input[type="range"]{padding:0;border:0;accent-color:var(--blue)}.file-field{border:1.5px dashed #aebde1!important;background:#f7f9ff;border-radius:12px;padding:18px!important}.file-field input{border:0!important;padding:8px 0 0!important;background:transparent!important}.field-help{grid-column:1/-1;color:var(--muted);font-size:13px;margin:-10px 0 0}.warning{grid-column:1/-1;background:#fff8e8;color:#805c14;padding:11px 14px;border-radius:9px;margin:0;font-size:13px}button,.button-link{border:0;background:var(--blue);color:#fff;border-radius:10px;padding:11px 18px;font-weight:750;cursor:pointer;transition:.18s}button:hover,.button-link:hover{background:var(--blue-dark)}button:disabled{opacity:.5;cursor:not-allowed}.secondary{background:#eef2fb;color:#3f4f73}.secondary:hover{background:#dfe7f8}.danger{background:#fff0f2;color:var(--red)}.danger:hover{background:#fee0e5}.status{min-height:25px;color:var(--muted);margin:18px 0 0}.status.success{color:var(--green)}.status.error{color:var(--red)}.results{margin-top:24px;border-top:1px solid var(--line);padding-top:20px}.results h2{font-size:20px}.result-item{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:11px 0;border-bottom:1px solid #edf0f5}.result-item span{overflow:hidden;text-overflow:ellipsis}.result-item a{color:var(--blue);font-weight:700;white-space:nowrap}.tool-guide{margin-top:35px;padding:0 5px}.tool-guide h2{font-size:22px}.tool-guide li{margin:7px 0;color:#536078}.stamp-files{display:grid;grid-template-columns:1fr 1fr;gap:16px}.background-tool{margin:18px 0;padding:15px;background:#f6f8fd;border-radius:12px;display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:center}.check{display:flex!important;gap:9px;align-items:center}.check input{display:inline!important;width:auto!important;margin:0!important}.stamp-editor{display:grid;grid-template-columns:280px minmax(0,1fr);gap:24px;margin-top:20px}.stamp-controls{display:flex;flex-direction:column;gap:14px}.stamp-controls fieldset{border:1px solid var(--line);border-radius:13px;padding:16px;display:flex;flex-direction:column;gap:12px}.stamp-controls legend{font-weight:800;color:var(--blue);padding:0 5px}.stamp-controls button{width:100%}.button-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.page-nav{display:flex;align-items:center;justify-content:center;gap:18px;margin-bottom:12px}.canvas-wrap{position:relative;margin:auto;background:#dfe3eb;box-shadow:0 6px 25px rgba(0,0,0,.12);overflow:hidden}.canvas-wrap canvas{display:block;max-width:100%;height:auto}.stamp-layer{position:absolute;inset:0;overflow:hidden}.stamp-object{position:absolute;cursor:move;touch-action:none;outline:0;transform-origin:center}.stamp-object img{display:block;width:100%;height:auto;user-select:none;pointer-events:none}.stamp-object.selected{filter:drop-shadow(0 0 2px #2362ff)}.stamp-object.selected::after{content:"";position:absolute;inset:-4px;border:2px dashed #2362ff}.edge-preview{position:absolute;background-repeat:no-repeat;transform:translateY(-50%);pointer-events:none}.edge-preview.right{right:0}.edge-preview.left{left:0}.action-row{display:flex;gap:10px;margin-top:20px}.legal-note{font-size:13px;color:#805c14;background:#fff8e8;padding:13px 15px;border-radius:10px;margin:20px 0 0}.text-page{max-width:800px;background:#fff;margin-top:42px;margin-bottom:60px;border:1px solid var(--line);border-radius:18px}.text-page h1{font-size:36px}.text-page h2{margin-top:32px}.text-page p{color:#536078}.text-page.center{text-align:center}.text-page a{color:var(--blue)}
@media(max-width:900px){.tool-grid{grid-template-columns:repeat(2,1fr)}.hero-mark{display:none}.stamp-editor{grid-template-columns:1fr}.stamp-controls{display:grid;grid-template-columns:1fr 1fr}.site-footer>div{grid-template-columns:1fr}.site-footer nav{flex-wrap:wrap}.canvas-wrap{max-width:100%}}
@media(max-width:620px){.site-header{height:64px}.header-inner{padding:0 15px}.brand{font-size:17px}.brand img{width:36px;height:36px}.local-pill{display:none}.hero-inner{padding:42px 20px;min-height:auto}.hero h1{font-size:36px}.hero p{font-size:16px}.tools-section{padding:40px 15px}.section-heading{display:block}.tool-grid{grid-template-columns:1fr}.privacy-banner{margin:0 15px 45px;padding:22px}.privacy-lock{display:none}.tool-main{padding:24px 15px 55px}.tool-heading{align-items:flex-start}.tool-heading h1{font-size:29px}.icon-box.large{width:55px;height:55px;flex:0 0 auto}.workspace,.stamp-workspace{padding:18px}.form-grid,.stamp-files,.background-tool,.stamp-controls{grid-template-columns:1fr}.local-notice{align-items:flex-start;flex-direction:column;gap:2px}.site-footer>div{padding:30px 18px}.result-item{align-items:flex-start;flex-direction:column}.action-row{flex-direction:column}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}