:root{color-scheme:light;--md-sys-color-primary:#4d5a9f;--md-sys-color-on-primary:#fff;--md-sys-color-primary-container:#dfe1ff;--md-sys-color-on-primary-container:#101b57;--md-sys-color-secondary-container:#e3e1f1;--md-sys-color-on-secondary-container:#1b1b2c;--md-sys-color-surface:#fbf8ff;--md-sys-color-on-surface:#1b1b21;--md-sys-color-on-surface-variant:#46464f;--md-sys-color-surface-container-low:#f5f2fa;--md-sys-color-surface-container:#efedf5;--md-sys-color-surface-container-high:#e9e7ef;--md-sys-color-outline:#777680;--md-sys-color-outline-variant:#c7c5d0;--md-sys-color-error:#ba1a1a;--md-sys-shape-corner-small:8px;--md-sys-shape-corner-medium:12px;--md-sys-shape-corner-large:16px;--md-sys-shape-corner-extra-large:28px;--md-sys-shape-corner-full:9999px;--md-sys-typescale-body-large-size:16px;--md-sys-typescale-body-large-line-height:1.7;--md-sys-motion-easing-standard:cubic-bezier(.2,0,0,1)}
*{box-sizing:border-box}body{margin:0;font-family:Roboto,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;font-size:var(--md-sys-typescale-body-large-size);line-height:var(--md-sys-typescale-body-large-line-height);background:var(--md-sys-color-surface);color:var(--md-sys-color-on-surface)}a{color:var(--md-sys-color-primary);text-underline-offset:4px}button,input,textarea{font:inherit}button,a,input,textarea,summary{outline-offset:4px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--md-sys-color-primary)}button{cursor:pointer}button:disabled{opacity:.5;cursor:wait}svg{width:24px;height:24px;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.drawer{position:fixed;inset:0 auto 0 0;width:232px;padding:32px 16px 20px;background:var(--md-sys-color-surface-container-low);display:flex;flex-direction:column;gap:28px}.brand{display:flex;align-items:center;gap:12px;padding:0 12px;text-decoration:none;font-weight:650;color:var(--md-sys-color-on-surface)}.brand svg{width:32px;height:32px;color:var(--md-sys-color-primary)}nav{display:flex;flex-direction:column;gap:6px}nav a{display:flex;align-items:center;gap:16px;min-height:56px;border-radius:var(--md-sys-shape-corner-full);padding:12px 20px;text-decoration:none;color:var(--md-sys-color-on-surface-variant);font-size:14px;font-weight:500}nav a[aria-current=page]{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container);font-weight:650}nav a:hover{background:var(--md-sys-color-surface-container-high)}.drawer-bottom{margin-top:auto;padding:12px;font-size:13px}.drawer-bottom a{color:var(--md-sys-color-on-surface-variant)}.workspace{margin-left:232px;min-height:100vh;display:flex;flex-direction:column}.topbar{height:88px;display:flex;align-items:center;justify-content:space-between;padding:0 40px;max-width:1120px;width:100%;margin:0 auto;color:var(--md-sys-color-on-surface-variant);font-size:13px;letter-spacing:.06em}.topbar a{text-decoration:none;letter-spacing:0}main{width:100%;max-width:1040px;margin:0 auto;padding:28px 40px 48px;flex:1}footer{width:100%;max-width:1040px;margin:0 auto;padding:24px 40px;color:var(--md-sys-color-on-surface-variant);font-size:12px}h1{font-size:clamp(30px,3.8vw,46px);line-height:1.3;font-weight:500;letter-spacing:-.035em;margin:12px 0 18px}h2{font-size:22px;line-height:1.5;font-weight:500;margin:32px 0 12px}h3{font-size:17px;font-weight:550;margin:0 0 6px}p{margin:12px 0;color:var(--md-sys-color-on-surface-variant)}.lead{font-size:18px;max-width:560px}.eyebrow{font-size:12px;color:var(--md-sys-color-primary);font-weight:650;letter-spacing:.12em}.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;align-items:center;padding:36px 0 52px}.hero h1{font-size:clamp(36px,4vw,52px)}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.button,button.primary,button.secondary{min-height:48px;display:inline-flex;justify-content:center;align-items:center;gap:10px;border-radius:var(--md-sys-shape-corner-full);padding:12px 24px;border:0;text-decoration:none;font-size:14px;font-weight:600;line-height:1.5;background:var(--md-sys-color-primary);color:var(--md-sys-color-on-primary);transition:filter 200ms var(--md-sys-motion-easing-standard)}.button:hover,button.primary:hover{filter:brightness(.93)}.button.tonal,button.secondary{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container)}.text-button{background:none;border:none;padding:12px;min-height:48px;color:var(--md-sys-color-primary)}.tonal-panel{padding:28px;border-radius:var(--md-sys-shape-corner-extra-large);background:var(--md-sys-color-primary-container);color:var(--md-sys-color-on-primary-container)}.tonal-panel p{color:inherit}.steps{padding:0;list-style:none;margin:20px 0 0;display:grid;gap:24px}.steps li{display:flex;align-items:center;gap:16px}.step-number{height:36px;width:36px;border-radius:var(--md-sys-shape-corner-full);background:var(--md-sys-color-surface);display:grid;place-items:center;flex:none;font-size:14px;font-weight:600}.steps small{display:block;opacity:.7}.feature-list{border-top:1px solid var(--md-sys-color-outline-variant);padding-top:28px;display:grid;grid-template-columns:repeat(3,1fr);gap:32px}.feature-list svg{color:var(--md-sys-color-primary);margin-bottom:12px}.feature-list p{font-size:14px;margin:6px 0}.page-intro{margin-bottom:32px}.page-intro p{max-width:640px}.article{max-width:720px}.article h1{margin-bottom:28px}.article h2{padding-top:20px;margin-top:24px;border-top:1px solid var(--md-sys-color-outline-variant)}.article p{font-size:15px;line-height:1.9}.form-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:32px;align-items:start}.form-panel{background:var(--md-sys-color-surface-container-low);border-radius:var(--md-sys-shape-corner-extra-large);padding:28px}.form-side{padding-top:8px}.form-side h2{font-size:17px;margin:8px 0}.form-side p,.form-side li{font-size:14px}.segmented{display:flex;border:1px solid var(--md-sys-color-outline);border-radius:var(--md-sys-shape-corner-full);overflow:hidden;margin:0 0 24px}.segment{position:relative;flex:1;margin:0!important;text-align:center;cursor:pointer}.segment input{position:absolute;opacity:0;width:1px;height:1px}.segment span{min-height:48px;display:flex;justify-content:center;align-items:center;gap:8px;font-size:14px}.segment input:checked+span{background:var(--md-sys-color-secondary-container);color:var(--md-sys-color-on-secondary-container);font-weight:600}.segment input:focus-visible+span{outline:3px solid var(--md-sys-color-primary);outline-offset:-4px}.segment+ .segment{border-left:1px solid var(--md-sys-color-outline)}label.field{display:block;margin:20px 0;font-size:13px;font-weight:550}input[type=text],textarea{display:block;width:100%;border:1px solid var(--md-sys-color-outline);border-radius:var(--md-sys-shape-corner-small);background:transparent;color:var(--md-sys-color-on-surface);padding:14px 16px;margin-top:8px;font-size:16px}input:focus,textarea:focus{outline:2px solid var(--md-sys-color-primary);border-color:transparent}textarea{resize:vertical;line-height:1.6}.dropzone{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:36px 20px;border:1px dashed var(--md-sys-color-outline);border-radius:var(--md-sys-shape-corner-large);text-align:center;cursor:pointer;color:var(--md-sys-color-primary);min-height:160px}.dropzone:hover,.dropzone.dragover{background:var(--md-sys-color-surface-container)}.dropzone input{position:absolute;inset:0;opacity:0;width:100%;height:100%;cursor:pointer}.dropzone:focus-within{outline:2px solid var(--md-sys-color-primary)}.dropzone small{font-size:12px;color:var(--md-sys-color-on-surface-variant)}.file-list{list-style:none;padding:0;margin:12px 0;font-size:13px}.file-list li{display:flex;justify-content:space-between;gap:12px;padding:8px 0;border-bottom:1px solid var(--md-sys-color-outline-variant);overflow-wrap:anywhere}.file-list button{background:none;border:0;color:var(--md-sys-color-primary);min-width:40px;min-height:40px}details{margin:20px 0}summary{font-size:14px;cursor:pointer;padding:8px 0;min-height:40px;color:var(--md-sys-color-on-surface-variant)}.hint{font-size:12px!important;color:var(--md-sys-color-on-surface-variant)}#status{font-size:14px;overflow-wrap:anywhere}#status.error{color:var(--md-sys-color-error)}.status-panel{padding:16px 20px;background:var(--md-sys-color-surface-container);border-radius:var(--md-sys-shape-corner-medium)}.contact-panel{padding:28px;background:var(--md-sys-color-surface-container-low);border-radius:var(--md-sys-shape-corner-extra-large);max-width:640px}.contact-panel .email{font-size:clamp(19px,3vw,24px);overflow-wrap:anywhere}.faq{max-width:720px}.faq details{border-bottom:1px solid var(--md-sys-color-outline-variant);padding:8px 0}.faq summary{font-size:16px;color:var(--md-sys-color-on-surface)}.faq p{font-size:14px}button.full{width:100%;margin-top:12px}[hidden]{display:none!important}@media(max-width:1000px){.drawer{width:200px}.workspace{margin-left:200px}main{padding:20px 28px 40px}.topbar{padding:0 28px}.form-layout{grid-template-columns:1fr}.form-side{border-top:1px solid var(--md-sys-color-outline-variant);padding-top:20px}.hero{gap:24px}.hero h1{font-size:38px}}@media(max-width:650px){.drawer{position:static;width:auto;padding:20px 16px 12px;gap:16px}.brand{padding:0 8px}.drawer nav{flex-direction:row;gap:4px}.drawer nav a{flex:1;justify-content:center;gap:8px;padding:12px 8px;min-height:48px;font-size:13px}.drawer nav svg{width:20px;height:20px}.drawer nav a:last-child{display:none}.drawer-bottom{display:none}.workspace{margin-left:0}.topbar{height:48px;padding:0 24px}main{padding:20px 24px 32px}.hero{grid-template-columns:1fr;padding:12px 0 32px;gap:28px}.hero h1{font-size:38px}.feature-list{gap:24px;grid-template-columns:1fr}.feature-list section{display:grid;grid-template-columns:32px 1fr;gap:0 12px}.feature-list svg{grid-row:1/3;margin:4px 0}.feature-list p{margin:0}.form-panel{padding:20px}.tonal-panel{padding:24px}footer{padding:24px}.article p{font-size:15px}.page-intro{margin-bottom:24px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}