@layer od-layout{:where(.od-stack,.od-row,.od-row-top,.od-cluster,.od-grid,.od-field,.od-stat,.od-cell,.od-tile)>*{min-width:0}.od-stack{display:flex;flex-direction:column;gap:var(--od-gap,8px)}.od-row{display:flex;align-items:center;gap:var(--od-gap,8px)}.od-row-top{display:flex;align-items:flex-start;gap:var(--od-gap,8px)}.od-cluster{display:flex;flex-wrap:wrap;align-items:center;gap:var(--od-gap,8px)}.od-fill{flex:1 1 0;min-width:0}.od-fixed{flex:none}.od-grid{display:grid;gap:var(--od-gap,12px);grid-template-columns:repeat(var(--od-cols,3),minmax(0,1fr))}.od-stat,.od-field,.od-cell{display:grid;gap:var(--od-gap,2px)}:where(.od-stat,.od-field,.od-cell)>*{display:block}.od-nowrap{white-space:nowrap}.od-truncate{display:block;max-width:100%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.od-touch{min-width:44px;min-height:44px}}:root{--ink:#142326;--muted:#56676a;--subtle:#728184;--line:#d8e2e1;--surface:#fff;--canvas:#f3f7f6;--navy:#15333a;--teal:#0b6b66;--teal-dark:#07534f;--mint:#dff3ef;--success:#126b4f;--danger:#a73333;--danger-bg:#fff1f0;--focus:#0a7d78;--shadow:0 20px 55px rgba(24,53,58,.11);--r-sm:8px;--r-md:12px;--r-lg:18px;--s1:4px;--s2:8px;--s3:12px;--s4:16px;--s5:24px;--s6:32px;--s7:48px;--s8:64px;--max:1180px;--reading:720px;--font-body:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;--font-display:Georgia,"Songti SC",serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--canvas);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.65}a{color:var(--teal);text-underline-offset:3px}button,input{font:inherit}button,a,.dropzone{transition:color .18s ease,background .18s ease,border-color .18s ease,transform .18s ease}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,.dropzone:focus-visible{outline:3px solid rgba(10,125,120,.32);outline-offset:3px}.skip-link{position:absolute;left:-999px;top:8px}.skip-link:focus{left:8px;z-index:100;padding:8px 12px;background:#fff;border-radius:8px}.site-header{position:sticky;top:0;z-index:30;background:#f3f7f6f5;border-bottom:1px solid rgba(216,226,225,.85);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.nav-wrap{max-width:var(--max);margin:auto;min-height:72px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;color:var(--navy);font-weight:800;letter-spacing:.08em;text-decoration:none}.brand-mark{width:36px;height:36px;display:grid;place-items:center;border-radius:10px;background:var(--navy);color:#fff;font-family:var(--font-display);font-size:21px}.nav-links{display:flex;align-items:center;gap:24px}.nav-links a{color:var(--muted);text-decoration:none;font-weight:650;font-size:14px}.nav-links a[aria-current=page]{color:var(--teal)}.nav-links a:hover{color:var(--navy)}.lang-link{padding:8px 12px;border:1px solid var(--line);border-radius:8px}.menu-button{display:none;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);padding:8px}.menu-button svg{display:block}.page{max-width:var(--max);margin:auto;padding:64px 24px 96px}.hero{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(420px,.96fr);gap:64px;align-items:start}.hero-centered{grid-template-columns:minmax(0,880px);justify-content:center;gap:40px}.hero-centered .hero-copy-area{text-align:center;max-width:820px;margin-inline:auto}.hero-centered .hero-copy{margin-inline:auto}.hero-centered .privacy-note,.hero-centered .steps{justify-content:center}.hero-centered .tool-panel{width:100%;max-width:880px;margin-inline:auto}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--teal);font-size:12px;font-weight:800;letter-spacing:.13em;text-transform:uppercase}.eyebrow:before{content:"";width:22px;height:2px;background:currentColor}.hero h1,.article h1{font-family:var(--font-display);font-weight:700;letter-spacing:-.035em;line-height:1.06;margin:16px 0 20px;color:var(--navy)}.hero h1{font-size:clamp(42px,5.4vw,72px)}.hero-copy{font-size:19px;color:var(--muted);max-width:650px;margin:0}.privacy-note{display:flex;align-items:flex-start;gap:12px;margin:24px 0;color:var(--navy);font-weight:700}.privacy-icon{flex:none;width:32px;height:32px;display:grid;place-items:center;background:var(--mint);border-radius:50%;color:var(--teal)}.steps{display:flex;align-items:center;gap:8px;margin-top:28px;padding:0;list-style:none}.steps li{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:14px;font-weight:700}.steps li:not(:last-child):after{content:"→";color:#91a09f;margin-left:6px}.step-number{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;background:#e5eceb;color:var(--navy);font-size:12px}.tool-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow)}.tool-panel [data-state=result]:not(.hidden){display:grid;grid-template-rows:auto minmax(0,1fr) auto;max-height:min(720px,calc(100vh - 136px));min-height:0}.tool-panel [data-state=result]>.btn-link{justify-self:start;margin-top:10px}.dropzone{position:relative;display:grid;place-items:center;text-align:center;min-height:310px;padding:40px 28px;border:2px dashed #9bb7b4;border-radius:var(--r-md);background:#f9fcfb;color:var(--muted)}.dropzone.is-dragging{background:var(--mint);border-color:var(--teal);transform:translateY(-2px)}.dropzone input{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;cursor:pointer}.drop-icon{width:58px;height:58px;display:grid;place-items:center;border-radius:14px;background:var(--mint);color:var(--teal);margin-bottom:18px}.dropzone strong{display:block;color:var(--navy);font-size:18px}.dropzone p{margin:6px 0 0}.file-rules{font-size:13px;color:var(--subtle)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:11px 18px;border-radius:9px;border:1px solid transparent;font-weight:750;text-decoration:none}.btn-primary{background:var(--teal);color:#fff}.btn-primary:hover{background:var(--teal-dark)}.btn-secondary{background:#fff;color:var(--navy);border-color:var(--line)}.btn-secondary:hover{background:#eef4f3}.btn-link{background:transparent;color:var(--teal);padding-inline:6px}.status{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;border-radius:10px;margin-bottom:16px}.status-error{background:var(--danger-bg);color:var(--danger);border:1px solid #f0c5c1}.status-success{background:#e7f5ed;color:var(--success);border:1px solid #b9ddc9}.status button{margin-left:auto;border:0;background:transparent;color:inherit;font-size:20px;line-height:1}.processing{display:grid;place-items:center;min-height:310px;text-align:center}.spinner{width:42px;height:42px;border:4px solid #d6e5e3;border-top-color:var(--teal);border-radius:50%;animation:spin .8s linear infinite}.processing h2{font-size:20px;margin:18px 0 4px}.processing p{color:var(--muted);margin:0}.section{margin-top:88px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}.section h2{font-family:var(--font-display);font-size:clamp(30px,3vw,42px);line-height:1.15;letter-spacing:-.025em;color:var(--navy);margin:0}.section-lead{max-width:600px;color:var(--muted);margin:8px 0 0}.feature-grid{--od-cols:3}.feature{padding-top:20px;border-top:2px solid var(--line)}.feature-index{color:var(--teal);font-weight:800;font-size:13px}.feature h3{margin:10px 0 6px;color:var(--navy);font-size:18px}.feature p{margin:0;color:var(--muted)}.preview{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:0 12px 34px #18353a12;overflow:hidden}.preview-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;border-bottom:1px solid var(--line);background:#f8fbfa}.preview-toolbar.is-sticky{position:sticky;top:0;z-index:3;box-shadow:0 1px #18353a0f}.file-chip{display:flex;align-items:center;gap:10px;min-width:0}.file-chip strong{display:block;color:var(--navy)}.file-chip small{display:block;color:var(--muted)}.preview-actions{display:flex;gap:10px}.mail{padding:32px;min-height:0;overflow-y:auto;overscroll-behavior:contain;scrollbar-gutter:stable}.mail-subject{font-family:var(--font-display);font-size:30px;line-height:1.2;margin:0 0 24px;color:var(--navy);overflow-wrap:anywhere}.headers{display:grid;grid-template-columns:72px minmax(0,1fr);gap:8px 18px;padding-bottom:24px;border-bottom:1px solid var(--line)}.headers dt{font-size:13px;font-weight:800;color:var(--subtle);text-transform:uppercase}.headers dd{margin:0;color:var(--ink);overflow-wrap:anywhere}.mail-body{max-width:74ch;padding:28px 0;color:#26383b;overflow-wrap:anywhere}.attachments{border-top:1px solid var(--line);padding-top:22px}.attachments h3{margin:0 0 12px;font-size:16px}.attachment-list{display:grid;gap:8px;padding:0;list-style:none}.attachment-list li{display:flex;align-items:center;gap:12px;padding:10px 12px;background:#f5f8f7;border-radius:8px}.attachment-list span{overflow-wrap:anywhere}.empty-preview{display:grid;place-items:center;text-align:center;min-height:280px;padding:40px;color:var(--muted)}.empty-preview svg{color:#91aaa7}.faq-list{display:grid;gap:0;border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-item summary{list-style:none;display:flex;justify-content:space-between;gap:24px;cursor:pointer;padding:22px 0;color:var(--navy);font-weight:750}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";font-size:23px;color:var(--teal);font-weight:400}.faq-item[open] summary:after{content:"−"}.faq-item p{margin:-8px 0 24px;max-width:76ch;color:var(--muted)}.link-band{margin-top:80px;padding:32px;display:flex;justify-content:space-between;align-items:center;gap:32px;background:var(--navy);color:#fff;border-radius:var(--r-md)}.link-band h2{color:#fff;font-family:var(--font-display);font-size:28px;margin:0 0 6px}.link-band p{margin:0;color:#cbd8d9}.link-band .btn{background:#fff;color:var(--navy);white-space:nowrap}.site-footer{border-top:1px solid var(--line);background:#eaf0ef}.footer-wrap{max-width:var(--max);margin:auto;padding:36px 24px;display:flex;justify-content:space-between;gap:32px;color:var(--muted);font-size:14px}.footer-links{display:flex;flex-wrap:wrap;gap:18px}.footer-links a{color:var(--muted)}.hidden{display:none!important}.article-shell{max-width:var(--reading);margin:0 auto}.article h1{font-size:clamp(42px,6vw,66px)}.article-dek{font-size:20px;color:var(--muted);line-height:1.65}.article h2{font-family:var(--font-display);color:var(--navy);font-size:32px;line-height:1.2;margin:56px 0 16px}.article h3{color:var(--navy);font-size:22px;margin:40px 0 12px}.article p{margin:0 0 20px}.table-wrap{overflow-x:auto;margin:28px 0}.comparison{width:100%;min-width:620px;border-collapse:collapse;background:#fff}.comparison th,.comparison td{text-align:left;vertical-align:top;padding:14px 16px;border:1px solid var(--line)}.comparison th{background:#e7efee;color:var(--navy)}.article-cta{margin:56px 0 0;padding:28px;background:var(--navy);color:#fff;border-radius:var(--r-md)}.article-cta h2{color:#fff;margin:0 0 8px;font-size:28px}.article-cta p{margin:0;color:#d6e1e1}.article-cta a{color:#8ee0d6}.kicker{color:var(--teal);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:900px){.hero{grid-template-columns:1fr;gap:40px}.tool-panel [data-state=result]:not(.hidden){max-height:min(720px,76vh)}.hero-copy{max-width:720px}.feature-grid{--od-cols:1}.section{margin-top:64px}.nav-links{position:absolute;left:16px;right:16px;top:64px;padding:16px;display:none;align-items:stretch;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow)}.nav-links.open{display:flex}.menu-button{display:block}.link-band{align-items:flex-start;flex-direction:column}.footer-wrap{flex-direction:column}}@media(max-width:600px){.nav-wrap{min-height:64px;padding:0 16px}.tool-panel [data-state=result]:not(.hidden){max-height:min(680px,78vh)}.page{padding:40px 16px 72px}.hero h1{font-size:42px}.hero-copy{font-size:17px}.steps{align-items:flex-start;flex-direction:column}.hero-centered .steps{align-items:center}.steps li:not(:last-child):after{content:"↓"}.tool-panel{padding:14px}.dropzone{min-height:270px;padding:28px 16px}.section-heading,.preview-toolbar{align-items:flex-start;flex-direction:column}.preview-actions{width:100%;display:grid;grid-template-columns:1fr 1fr}.mail{padding:22px 18px}.mail-subject{font-size:25px}.headers{grid-template-columns:1fr;gap:2px}.headers dd{margin-bottom:10px}.footer-wrap{padding-inline:16px}.article h1{font-size:42px}.article-dek{font-size:18px}.article h2{font-size:28px}.table-wrap{margin-inline:-16px;padding-inline:16px}.comparison{min-width:0}.comparison thead{display:none}.comparison,.comparison tbody,.comparison tr,.comparison td{display:block}.comparison tr{margin-bottom:16px;border:1px solid var(--line);background:#fff}.comparison td{border:0;border-bottom:1px solid var(--line)}.comparison td:last-child{border-bottom:0}.comparison td:before{content:attr(data-label);display:block;color:var(--subtle);font-size:12px;font-weight:800;text-transform:uppercase}.link-band{margin-top:56px;padding:24px}}@media print{.site-header,.site-footer,.hero-copy-area,.preview-toolbar,.faq-section,.link-band{display:none!important}.page{max-width:none;padding:0}.hero{display:block}.tool-panel{display:none}.section{margin:0}.preview{box-shadow:none;border:0}.mail{padding:0}body{background:#fff;color:#000}}.preview-section{scroll-margin-top:96px}.preview-section>.section-heading{margin-bottom:28px}.preview-section .preview,.preview-section .empty-preview{min-height:280px}.preview-section .mail{max-height:none;overflow:visible}.tool-panel [data-state=result]:not(.hidden){grid-template-rows:auto auto;max-height:none}.tool-panel [data-state=result]>.btn-link{margin-top:6px}@media print{.preview-section>.section-heading,.empty-preview{display:none!important}.preview-section{break-before:page}.preview-section .mail{display:block!important}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.format-choice{margin-top:64px;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:32px;padding:28px 32px;background:#e7efee;border:1px solid #cadbd9;border-radius:var(--r-md)}.format-choice h2{font-family:var(--font-display);font-size:28px;line-height:1.2;color:var(--navy);margin:0 0 6px}.format-choice p{margin:0;color:var(--muted);max-width:68ch}.format-choice .btn{white-space:nowrap}.trust-kicker{display:block;margin-bottom:8px;color:var(--teal);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}.dropzone>span>span{display:block}@media(max-width:900px){.format-choice{grid-template-columns:1fr;align-items:start}}@media(max-width:600px){.format-choice{margin-top:48px;padding:24px 20px}}