:root{--bg:#06080f;--surface:rgba(14,18,31,0.86);--surface-strong:#111626;--text:#f4f7ff;--muted:#8d97b5;--line:rgba(130,157,255,0.18);--brand:#6a7dff;--brand-dark:#8d9aff;--brand-soft:rgba(106,125,255,0.14);--accent:#39d0ff;--accent-soft:rgba(57,208,255,0.14);--shadow:0 30px 90px rgba(0,0,0,0.42);--radius-xl:36px;--radius-lg:28px;--radius-md:18px;--radius-sm:12px;--max-width:1160px;--font-body:"Inter Number","Helvetica Neue","PingFang SC",Roboto,"Source Han Sans","Microsoft YaHei",sans-serif;--font-display:"Segoe UI","Helvetica Neue",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);font-family:var(--font-body);background:radial-gradient(circle at 12% 12%,rgba(57,208,255,.13),transparent 22%),radial-gradient(circle at 88% 8%,rgba(106,125,255,.16),transparent 18%),radial-gradient(circle at 50% 120%,rgba(33,67,156,.18),transparent 32%),linear-gradient(180deg,#06080f,#090d16 46%,#05070c)}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input,select{font:inherit}.page-shell{min-height:100vh}.container{width:min(calc(100% - 32px),var(--max-width));margin:0 auto}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:10;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:rgba(7,10,18,.72);border-bottom:1px solid rgba(130,157,255,.14)}.footer-grid,.header-inner,.hero-grid,.pricing-grid,.section-grid,.status-grid{display:grid;grid-gap:24px;gap:24px}.header-inner{grid-template-columns:auto 1fr auto;align-items:center;padding:18px 0}.brand{font-weight:800;letter-spacing:.04em;text-transform:uppercase}.brand-lockup{gap:12px;line-height:1}.brand-lockup,.brand-mark{display:inline-flex;align-items:center}.brand-mark{width:42px;height:42px;border-radius:14px;border:1px solid rgba(57,208,255,.24);background:linear-gradient(180deg,rgba(57,208,255,.12),rgba(106,125,255,.14));box-shadow:inset 0 1px 0 rgba(255,255,255,.08);color:#ffffff}.brand-mark,.nav{justify-content:center}.nav{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted)}.header-link,.nav a{position:relative}.nav a:hover{color:var(--text)}.header-actions{display:flex;gap:12px;align-items:center;justify-content:flex-end}.header-nav{width:100%;justify-content:center}.header-link{color:var(--muted)}.language-switcher{display:inline-flex;align-items:center;gap:10px;color:var(--muted)}.language-label{font-size:13px}.language-select{-moz-appearance:none;appearance:none;-webkit-appearance:none;min-height:38px;min-width:168px;padding:0 42px 0 14px;border-radius:10px;border:1px solid rgba(130,157,255,.18);background:linear-gradient(180deg,rgba(18,24,43,.98),rgba(11,16,30,.96));color:var(--text);box-shadow:inset 0 1px 0 rgba(255,255,255,.05);background-image:linear-gradient(45deg,transparent 50%,#cfd8ff 0),linear-gradient(135deg,#cfd8ff 50%,transparent 0);background-position:calc(100% - 20px) calc(50% - 2px),calc(100% - 14px) calc(50% - 2px);background-size:6px 6px,6px 6px;background-repeat:no-repeat;color-scheme:dark}.language-select:focus{outline:2px solid rgba(57,208,255,.34);outline-offset:2px}.language-select option{background:#101629;color:#f4f7ff;border-radius:10px}.hero{padding:60px 0 36px}.hero-grid{grid-template-columns:1fr;align-items:start}.eyebrow{display:inline-flex;align-items:center;gap:10px;padding:8px 14px;border-radius:999px;background:rgba(57,208,255,.08);color:#cdefff;font-size:14px;font-weight:700;letter-spacing:.02em;border:1px solid rgba(57,208,255,.12)}.eyebrow-dark{background:rgba(255,255,255,.06);color:#dce3ff}.hero h1,.page-hero h1,.section h2{margin:18px 0 14px;line-height:.96;letter-spacing:-.04em;font-family:var(--font-display)}.hero h1{font-size:clamp(44px,7vw,88px)}[data-locale=zh-CN] .hero h1{line-height:1.08;letter-spacing:-.02em;text-wrap:balance}.hero p,.page-hero p,.section-intro{color:var(--muted);font-size:18px;line-height:1.65}.hero-copy{position:relative;width:100%}.faq-item,.feature-card,.hero-card,.legal-card,.panel,.plan-card,.step-card{background:linear-gradient(180deg,rgba(14,18,31,.92),rgba(10,13,22,.88));border:1px solid var(--line);box-shadow:var(--shadow);border-radius:var(--radius-lg)}.hero-card,.legal-card,.panel{padding:28px}.hero-card{background:linear-gradient(180deg,rgba(16,20,36,.98),rgba(11,15,27,.94))}.hero-card-head,.split-heading{display:flex;gap:18px;align-items:flex-start;justify-content:space-between}.hero-form{display:grid;grid-gap:14px;gap:14px;margin:30px 0 22px}.hero-inline-form{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-gap:0;gap:0;align-items:stretch}.hero-input{min-width:0}.hero-input.ant-input-affix-wrapper,.hero-input.ant-input-outlined{border-radius:var(--radius-md) 0 0 var(--radius-md);border-color:var(--line);background:rgba(5,8,16,.88);color:var(--text);box-shadow:inset 0 1px 0 rgba(255,255,255,.04)}.hero-input.ant-input-affix-wrapper input,.hero-input.ant-input-outlined,.hero-input.ant-input-outlined input{color:var(--text)}.hero-input.ant-input-affix-wrapper input::placeholder,.hero-input.ant-input-outlined::placeholder{color:#6f7a98}.hero-input.ant-input-affix-wrapper-focused,.hero-input.ant-input-affix-wrapper:focus,.hero-input.ant-input-outlined:focus,.hero-input.ant-input-outlined:focus-within{border-color:rgba(57,208,255,.5);box-shadow:0 0 0 2px rgba(57,208,255,.12)}.hero-actions,.inline-actions{display:flex;gap:12px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 18px;border-radius:999px;border:1px solid transparent;font-weight:700;cursor:pointer}.button-primary{background:var(--brand);color:#fff;box-shadow:0 16px 34px rgba(106,125,255,.34)}.button-primary:hover{background:var(--brand-dark)}.hero-submit-button{min-width:124px!important;height:auto!important;border-radius:0 var(--radius-md) var(--radius-md) 0!important;box-shadow:0 16px 34px rgba(106,125,255,.34)}.hero-secondary-button.ant-btn{border-color:var(--line);background:rgba(255,255,255,.03);color:var(--text)}.hero-secondary-button.ant-btn:focus,.hero-secondary-button.ant-btn:hover{border-color:rgba(57,208,255,.32)!important;color:var(--text)!important;background:rgba(255,255,255,.06)!important}.hero-trust{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:14px}.hero-trust span{display:inline-flex;align-items:center;gap:8px}.hero-trust span:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px rgba(57,208,255,.6)}.faq-item h3,.feature-card h3,.legal-card h2,.panel-title,.plan-title,.step-card h3{margin:0 0 10px}.status-grid{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:24px}.faq-list,.meta-list,.plan-list{display:grid;grid-gap:12px;gap:12px;padding:0;margin:0;list-style:none}.page-section,.section{padding:36px 0 64px}.section-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.split-heading{margin-bottom:24px}.split-heading>*{flex:1 1}.section-accent{position:relative}.section-accent:before{content:"";position:absolute;inset:18px 0 auto;height:220px;background:linear-gradient(180deg,rgba(15,19,34,.8),rgba(15,19,34,0));pointer-events:none}.faq-item,.feature-card,.plan-card,.step-card{padding:24px}.feature-card,.step-card{position:relative;overflow:hidden}.feature-card:after,.step-card:after{content:"";position:absolute;inset:auto -20px -28px auto;width:120px;height:120px;border-radius:999px;background:radial-gradient(circle,rgba(57,208,255,.12),transparent 68%);pointer-events:none}.feature-card-contrast{background:linear-gradient(180deg,rgba(16,23,39,.94),rgba(11,16,29,.92))}.feature-icon,.step-index{display:inline-flex;width:42px;height:42px;align-items:center;justify-content:center;border-radius:50%;background:rgba(18,71,52,.1);color:var(--accent);font-weight:800;border:1px solid rgba(57,208,255,.18)}.pricing-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.plan-card.highlight{background:linear-gradient(180deg,rgba(20,28,52,.98),rgba(13,19,35,.94));border-color:rgba(106,125,255,.36)}.plan-price{margin:10px 0}.hero-notes,.muted{color:var(--muted)}.hero-notes{display:grid;grid-gap:8px;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid rgba(130,157,255,.14);font-size:14px}.hero-compliance{display:flex;align-items:flex-start;justify-content:center;gap:10px;margin-top:8px;color:var(--muted)}.hero-compliance-copy{display:grid;grid-gap:4px;gap:4px;text-align:center}.hero-compliance-copy p{margin:0;font-size:14px;line-height:1.45}.hero-compliance-info{display:inline-flex;width:22px;height:22px;align-items:center;justify-content:center;margin-top:2px;padding:0;border-radius:999px;border:1px solid rgba(130,157,255,.24);background:rgba(255,255,255,.04);color:var(--text);cursor:pointer}.hero-compliance-info .anticon{font-size:13px;line-height:1}.hero-compliance-tooltip-content{width:min(360px,calc(100vw - 48px));color:#2e3448}.hero-compliance-tooltip-content p{margin:0;font-size:14px;line-height:1.6}.hero-compliance-tooltip-content p+p{margin-top:12px}.hero-feedback{display:grid;grid-gap:14px;gap:14px;margin-top:18px;padding:18px 20px;border-radius:var(--radius-md);border:1px solid rgba(130,157,255,.18);background:linear-gradient(180deg,rgba(12,17,31,.92),rgba(9,13,24,.88))}.hero-feedback h3{margin:0;font-size:16px}.hero-feedback-loading{place-items:center;text-align:center}.hero-feedback-loading .ant-spin-dot-item{background-color:var(--brand)}.hero-feedback-error{color:#ffd8de;border-color:rgba(255,105,135,.28);background:linear-gradient(180deg,rgba(49,16,25,.94),rgba(31,11,18,.9))}.hero-result-list{display:grid;grid-gap:12px;gap:12px;margin:0}.hero-result-list div{display:grid;grid-gap:4px;gap:4px}.hero-result-list dt{color:var(--muted);font-size:13px}.hero-result-list dd{margin:0;color:var(--text);font-size:15px;word-break:break-word}.hero-feedback-note{margin:0;color:var(--muted);font-size:14px;line-height:1.7}.hero-feedback-link{color:#cdefff;text-decoration:underline;text-underline-offset:3px}.hero-preview-card{margin-top:18px;border-radius:var(--radius-md);border:1px solid rgba(130,157,255,.18);background:linear-gradient(180deg,rgba(12,17,31,.92),rgba(9,13,24,.88))}.hero-preview-card .ant-card-body{display:grid;grid-template-columns:132px minmax(0,1fr);grid-gap:20px;gap:20px;padding:20px}.hero-preview-cover{overflow:hidden;border-radius:16px;background:rgba(255,255,255,.05);min-height:132px}.hero-preview-cover img,.hero-preview-cover-fallback{width:100%;height:100%}.hero-preview-cover img{object-fit:cover}.hero-preview-cover-fallback{display:grid;place-items:center;background:linear-gradient(135deg,rgba(106,125,255,.24),rgba(57,208,255,.2));color:#ffffff;font-weight:800;letter-spacing:.08em}.hero-preview-body{display:grid;grid-gap:14px;gap:14px;align-content:start}.hero-preview-body h3{margin:0;font-size:clamp(24px,4vw,34px);line-height:1.1;letter-spacing:-.04em}.hero-preview-meta{display:flex;gap:10px;flex-wrap:wrap}.hero-preview-meta .ant-tag{-webkit-margin-end:0;margin-inline-end:0;padding:6px 12px;border-radius:999px;border-color:rgba(130,157,255,.14);background:rgba(255,255,255,.06);color:#d6dcf2}.hero-preview-actions{display:flex;gap:12px;flex-wrap:wrap}.hero-task-panel{display:grid;grid-gap:14px;gap:14px;padding-top:10px}.hero-task-header{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.hero-task-title{color:var(--text);font-size:15px;font-weight:700}.hero-task-status-tag.ant-tag{-webkit-margin-end:0;margin-inline-end:0;padding:6px 12px;border-radius:999px;border-color:rgba(57,208,255,.18);background:rgba(57,208,255,.1);color:#d5f4ff}.hero-task-progress.ant-progress{margin:0}.hero-task-progress .ant-progress-text{color:var(--text)}.hero-task-actions{display:flex;gap:12px;flex-wrap:wrap}.hero-task-link{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 16px;border-radius:999px;border:1px solid rgba(57,208,255,.22);background:rgba(57,208,255,.08);text-decoration:none}.hero-limits-alert{margin-top:18px}.hero-limits-alert.ant-alert{border-radius:var(--radius-md);border:1px solid rgba(57,208,255,.16);background:linear-gradient(180deg,rgba(12,18,33,.92),rgba(9,13,24,.9))}.hero-limits-list{display:grid;grid-gap:10px;gap:10px;margin:0;padding:0;list-style:none;color:var(--muted);font-size:14px;line-height:1.7}.hero-limits-list li{display:grid;grid-template-columns:8px 1fr;grid-gap:10px;gap:10px;align-items:start}.hero-limits-list li:before{content:"";width:8px;height:8px;margin-top:8px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px rgba(57,208,255,.5)}.hero-limits-alert.ant-alert .ant-alert-description,.hero-limits-alert.ant-alert .ant-alert-icon,.hero-limits-alert.ant-alert .ant-alert-message{color:var(--text)}.about-download-section{padding-top:0}.about-download-panel{padding:32px;border-radius:var(--radius-lg);border:1px solid rgba(130,157,255,.16);background:linear-gradient(180deg,rgba(15,19,32,.96),rgba(10,13,24,.92));box-shadow:var(--shadow)}.about-download-panel h2{margin:0 0 28px;text-align:center;font-size:clamp(28px,4vw,42px);letter-spacing:-.04em;font-family:var(--font-display)}.about-illustration{position:relative;display:grid;grid-template-columns:minmax(0,1.6fr) auto minmax(180px,.9fr);align-items:center;grid-gap:20px;gap:20px;min-height:340px;padding:38px;border-radius:28px;background:radial-gradient(circle at 24% 26%,rgba(125,225,255,.16),transparent 20%),radial-gradient(circle at 78% 74%,rgba(126,108,255,.18),transparent 24%),linear-gradient(135deg,#5637b5,#6752cb 44%,#745fce);overflow:hidden}.about-illustration:after,.about-illustration:before{content:"";position:absolute;border-radius:999px;background:rgba(31,19,83,.22)}.about-illustration:before{top:28px;right:210px;width:14px;height:14px}.about-illustration:after{top:34px;right:30px;width:80px;height:8px}.about-browser,.about-file{position:relative;z-index:1}.about-browser{border-radius:26px;background:#f7f7fb;box-shadow:16px 18px 0 rgba(42,19,105,.24);overflow:hidden}.about-browser-top{display:flex;gap:12px;align-items:center;height:64px;padding:0 22px;background:#2f3140}.about-browser-top span{width:16px;height:16px;border-radius:50%;background:#8f96bc}.about-browser-screen{display:grid;place-items:center;min-height:270px;padding:26px}.about-youtube-mark{width:min(82%,400px)}.about-arrow{position:relative;z-index:1;width:clamp(88px,13vw,150px);filter:drop-shadow(12px 14px 0 rgba(42,19,105,.2))}.about-file{display:grid;justify-items:center;grid-gap:18px;gap:18px;width:min(100%,232px);margin-left:auto;padding:34px 26px 28px;border-radius:22px;background:#ffffff;color:#2f58c8;box-shadow:14px 16px 0 rgba(42,19,105,.22)}.about-file-fold{position:absolute;top:0;right:0;width:82px;height:82px;background:linear-gradient(135deg,rgba(255,255,255,0) 50%,#eceefe 0);border-top-right-radius:22px}.about-file-badge{width:88px}.about-file span{font-size:clamp(34px,4vw,58px);font-weight:800;letter-spacing:-.05em}.about-download-copy{display:grid;grid-gap:20px;gap:20px;margin-top:30px}.about-download-copy p{margin:0;color:#d6dcf2;font-size:18px;line-height:1.85}.faq-list{grid-template-columns:1fr 1fr}.cta-strip{background:linear-gradient(135deg,rgba(10,14,27,.98),rgba(16,21,41,.98) 62%,rgba(18,35,78,.95));color:#f3f7ff;border-radius:var(--radius-xl);padding:34px;display:grid;grid-gap:14px;gap:14px;border:1px solid rgba(130,157,255,.18);box-shadow:var(--shadow)}.site-footer{padding:26px 0 50px;border-top:1px solid rgba(130,157,255,.12);background:linear-gradient(180deg,rgba(6,8,15,0),rgba(5,7,13,.72))}.footer-grid{grid-template-columns:1.3fr 1fr 1fr;align-items:start;justify-content:space-between;color:var(--muted)}.footer-brand-block,.footer-column{display:grid;grid-gap:10px;gap:10px}.page-hero{padding:56px 0 24px}.comparison-table{width:100%;border-collapse:collapse;overflow:hidden;border-radius:var(--radius-md);background:rgba(14,18,31,.85);border:1px solid var(--line)}.comparison-table td,.comparison-table th{text-align:left;padding:16px;border-bottom:1px solid var(--line)}.comparison-table th{background:rgba(106,125,255,.08)}.content-grid,.legal-grid{display:grid;grid-gap:24px;gap:24px}.content-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.article-card,.content-card{border-radius:var(--radius-lg);border:1px solid var(--line);background:linear-gradient(180deg,rgba(14,18,31,.92),rgba(10,13,22,.88));box-shadow:var(--shadow)}.content-card{display:grid;grid-gap:16px;gap:16px;padding:24px}.article-section h2,.content-card h2{margin:0;letter-spacing:-.03em}.article-meta,.content-card-meta{display:flex;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:14px}.article-shell{width:min(calc(100% - 32px),1100px);margin:0 auto}.article-shell .page-hero p{max-width:760px}.article-card{padding:28px}.article-section{display:grid;grid-gap:14px;gap:14px}.article-section+.article-section{margin-top:26px;padding-top:26px;border-top:1px solid rgba(130,157,255,.14)}.article-section p{margin:0;color:#d8e0f6;line-height:1.9}.article-sidebar{display:grid;grid-gap:20px;gap:20px;margin-top:24px}.markdown-content{display:grid;grid-gap:18px;gap:18px}.markdown-content h2,.markdown-content h3,.markdown-content h4,.markdown-heading-fallback{margin:0;letter-spacing:-.03em}.markdown-content h2{margin-top:8px}.markdown-content h3,.markdown-content h4,.markdown-heading-fallback{color:#eef3ff}.markdown-blockquote p,.markdown-content li,.markdown-content p{margin:0;color:#d8e0f6;line-height:1.9}.markdown-list{display:grid;grid-gap:10px;gap:10px;margin:0;padding-left:24px;color:#d8e0f6}.markdown-list-ordered{padding-left:28px}.markdown-blockquote{margin:0;padding:18px 20px;border-left:3px solid rgba(57,208,255,.45);border-radius:0 var(--radius-md) var(--radius-md) 0;background:rgba(57,208,255,.08)}.markdown-blockquote p+p{margin-top:10px}.markdown-hr{width:100%;height:1px;margin:4px 0;border:0;background:rgba(130,157,255,.14)}.markdown-pre{margin:0;padding:18px 20px;overflow-x:auto;border-radius:var(--radius-md);border:1px solid rgba(130,157,255,.18);background:rgba(5,8,16,.92)}.markdown-content code,.markdown-pre code{font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace}.markdown-content code{padding:2px 6px;border-radius:8px;background:rgba(255,255,255,.06);font-size:.95em}.markdown-pre code{padding:0;background:transparent}.markdown-table-wrap{overflow-x:auto}.markdown-table{min-width:560px}.legal-grid{grid-template-columns:repeat(2,minmax(0,1fr))}@media (max-width:960px){.content-grid,.faq-list,.footer-grid,.header-inner,.hero-grid,.legal-grid,.pricing-grid,.section-grid,.status-grid{grid-template-columns:1fr}.header-inner{justify-items:start}.header-actions,.header-nav{width:100%;justify-content:flex-start}.status-grid{grid-template-columns:1fr}.hero-card-head,.nav,.split-heading{justify-content:flex-start}.about-illustration{grid-template-columns:1fr;justify-items:center;min-height:auto}.about-arrow{width:min(180px,46vw);transform:rotate(90deg)}.about-file{margin-left:0}.header-actions{flex-wrap:wrap}.hero-card-head,.split-heading{flex-direction:column}.hero-preview-card,.hero-preview-card .ant-card-body{grid-template-columns:1fr}}@media (max-width:640px){.hero{padding-top:30px}.hero h1,.page-hero h1{line-height:1.05}[data-locale=zh-CN] .hero h1{line-height:1.12;letter-spacing:0;max-width:none}.cta-strip,.faq-item,.feature-card,.hero-card,.legal-card,.panel,.plan-card,.step-card{padding:20px}.hero-inline-form{grid-template-columns:1fr;gap:1px}.hero-submit-button{width:100%;border-radius:0 0 var(--radius-md) var(--radius-md)!important}.about-download-panel,.about-illustration{padding:22px}.about-browser-top{height:52px;padding:0 16px}.about-browser-top span{width:12px;height:12px}.about-browser-screen{min-height:180px;padding:18px}.about-file{width:100%;max-width:220px;padding:28px 20px 24px}.about-file-fold{width:64px;height:64px}.about-download-copy p{font-size:16px}.hero-actions,.inline-actions{flex-direction:column}.hero-compliance{align-items:center}}