:root{color-scheme:dark;--bg:#090909;--paper:#151515;--ink:#f5f5f1;--muted:#b3b3b3;--line:#303030;--accent:#ff6871;--brand:#e50914;--brand-hover:#c11119;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);line-height:1.7}a{color:var(--accent);text-underline-offset:4px}a:focus-visible{outline:3px solid var(--accent);outline-offset:5px}header,main,footer{max-width:1080px;margin:auto;padding-left:28px;padding-right:28px}header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:25px;padding-bottom:25px;border-bottom:1px solid var(--line)}.brand{text-decoration:none;color:var(--ink);font-size:19px;font-weight:650;letter-spacing:-.5px}.brand small{font-size:11px;font-weight:550;letter-spacing:.14em}nav{display:flex;flex-wrap:wrap;gap:20px;font-size:13px}main{padding-top:74px;padding-bottom:68px}.eyebrow{color:var(--accent);font-size:12px;letter-spacing:.12em;text-transform:uppercase}h1{font-size:clamp(32px,5vw,56px);line-height:1.14;letter-spacing:-1.5px;font-weight:650;max-width:800px;margin:16px 0 25px}h2{font-size:21px;line-height:1.3;font-weight:620;margin:0 0 15px}.lead{max-width:720px;font-size:19px;color:var(--muted);margin-bottom:36px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:48px 0}.card,article{background:var(--paper);border:1px solid var(--line);border-radius:15px;padding:28px}.card p{font-size:14px;color:var(--muted);margin-bottom:0}.status{display:inline-block;font-size:12px;padding:7px 13px;border:1px solid var(--line);border-radius:24px;color:var(--muted)}article{max-width:830px}article section+section{border-top:1px solid var(--line);padding-top:24px;margin-top:28px}article p{margin:0 0 14px}article li+li{margin-top:8px}article ul{padding-left:22px}.meta{font-size:12px;color:var(--muted);margin:0 0 26px}.support-link{display:inline-block;background:var(--brand);color:#fff;border-radius:8px;padding:10px 18px;text-decoration:none;font-size:14px}.notice{padding:20px 0;font-size:13px;color:var(--muted);max-width:760px}footer{padding-top:24px;padding-bottom:28px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;color:var(--muted);font-size:12px}.footer-links{display:flex;flex-wrap:wrap;gap:17px}@media(max-width:650px){header{align-items:flex-start;gap:14px;flex-direction:column}nav{gap:16px}.cards{grid-template-columns:1fr}main{padding-top:40px}.card,article{padding:23px}h1{letter-spacing:-.7px}.lead{font-size:17px}}

/* 长产品名在窄屏上自然换行，平台说明独立成行。 */
.brand{display:flex;flex-direction:column;max-width:330px;line-height:1.35;overflow-wrap:anywhere}.brand small{font-size:12px;letter-spacing:0;color:var(--muted);font-weight:400;margin-top:4px}h1{text-wrap:balance}

/* 首页免费／会员对比与价格区；法律页的提示框、列表与长地址换行。 */
.tiers{grid-template-columns:repeat(2,minmax(0,1fr))}.tier h2{margin-bottom:6px}.card .tier-note{font-size:13px;color:var(--muted);margin:0 0 16px}.card ul{margin:0;padding-left:20px}.card li{font-size:14px;color:var(--muted)}.card li+li,.pricing li+li{margin-top:8px}
.pricing{background:var(--paper);border:1px solid var(--line);border-radius:15px;padding:28px;margin:0 0 36px;scroll-margin-top:24px}.pricing ul{margin:0;padding-left:20px;font-size:14px}.plans{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:0 0 24px}.plan{display:flex;flex-direction:column;gap:2px;border:1px solid var(--line);border-radius:12px;padding:18px 20px}.plan-name,.plan-period{font-size:13px;color:var(--muted)}.price{font-size:32px;line-height:1.2;font-weight:650;letter-spacing:-.5px}
.callout{margin:22px 0 0;padding:14px 16px;border-left:3px solid var(--accent);background:var(--bg);border-radius:0 8px 8px 0;font-size:14px}article .callout{margin:0 0 14px}.inline-links{display:flex;flex-wrap:wrap;gap:8px 20px;margin:18px 0 0;font-size:14px}.privacy-brief{max-width:760px;font-size:14px;color:var(--muted);margin:0 0 24px}
article section{scroll-margin-top:24px}article li{overflow-wrap:anywhere}code{font-size:.88em;overflow-wrap:anywhere;word-break:break-all}nav a[aria-current="page"]{color:var(--ink);text-decoration:none;font-weight:600}
@media(max-width:650px){.tiers,.plans{grid-template-columns:1fr}.pricing{padding:23px}}

/* 付款结果与返回入口使用明确的按钮状态。 */
.checkout .support-link{border:0;font:inherit;cursor:pointer}.checkout .support-link:disabled{opacity:.5;cursor:not-allowed}.checkout #status[data-state="success"]{border-left:3px solid var(--accent);padding-left:18px}

.checkout [hidden]{display:none!important}

/* 深色品牌配色：导航保持安静，重点链接与操作按钮使用红色。 */
nav a,.footer-links a{color:var(--muted)}a:hover{color:#ff8a91}nav a:hover,.footer-links a:hover{color:var(--accent)}.brand:hover{color:var(--ink)}.support-link:hover{background:var(--brand-hover);color:#fff}.support-link:active{background:#a90d14}.tier.member{border-color:#642227}.card li::marker,.pricing li::marker{color:#888}
/* 首页主视觉：原创的字幕练习示意，无影片素材或第三方资源。 */
.home main{padding-top:0;max-width:1120px}
.hero{position:relative;isolation:isolate;text-align:center;padding:92px 0 46px}
.hero::before{content:"";position:absolute;inset:-50px -28px -220px;z-index:-1;pointer-events:none;background:radial-gradient(ellipse at 50% 32%,rgba(229,9,20,.14),transparent 64%)}
.hero .eyebrow{display:flex;justify-content:center;align-items:center;gap:10px;color:#ded5d5;margin:0 0 26px;font-size:12px;letter-spacing:.13em}
.brand-signal{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--brand);box-shadow:0 0 18px rgba(229,9,20,.55)}
.hero h1{max-width:980px;margin:0 auto 26px;font-size:clamp(42px,6.5vw,82px);font-weight:700;letter-spacing:-3.8px;line-height:1.08}
.hero .lead{max-width:660px;margin:0 auto 30px;font-size:19px;line-height:1.8;text-wrap:balance}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:12px;margin:0 0 24px}
.hero-actions a{display:inline-flex;align-items:center;justify-content:center;gap:24px;min-height:48px;padding:10px 23px;font-weight:600;text-decoration:none}
.hero-actions .support-link{border-radius:8px;box-shadow:0 6px 28px rgba(229,9,20,.14)}
.secondary-link{border:1px solid #484040;border-radius:8px;background:rgba(255,255,255,.025);color:var(--ink)}
.secondary-link:hover{border-color:#84676a;color:#fff;background:rgba(255,255,255,.05)}
.hero .status{border:0;background:none;border-radius:0;padding:0;max-width:100%;font-size:11px;line-height:1.7;color:#a9a2a2}
.product-preview{margin:0 auto 104px;max-width:980px}
.preview-window{border:1px solid #403135;border-radius:18px;overflow:hidden;background:#121212;box-shadow:0 32px 90px rgba(0,0,0,.6),0 0 50px rgba(160,10,20,.06)}
.preview-topline{display:flex;align-items:center;gap:13px;padding:18px 24px;border-bottom:1px solid #282024;color:#aaa;font-size:12px;letter-spacing:.02em}
.preview-mark{display:grid;gap:4px;width:18px}.preview-mark i{display:block;height:4px;border-radius:2px;background:var(--brand)}.preview-mark i:last-child{width:11px;background:#b96a6f}
.preview-languages{margin-left:auto;color:#969092;font-size:11px;white-space:nowrap}
.preview-scene{position:relative;display:flex;align-items:flex-end;justify-content:center;isolation:isolate;min-height:310px;overflow:hidden;padding:48px 26px 46px;background:radial-gradient(ellipse at 50% 90%,#282124 0%,#151315 43%,#0f0f10 76%)}
.scene-orbit{position:absolute;z-index:-1;top:-168px;left:50%;width:440px;height:390px;transform:translateX(-50%) rotate(-28deg);border:1px solid #392229;border-radius:50%;box-shadow:0 0 70px rgba(120,10,23,.1)}
.orbit-two{width:710px;height:540px;top:-310px;border-color:#261f23;transform:translateX(-50%) rotate(25deg)}
.preview-captions{text-align:center;max-width:100%}.preview-captions p{margin:0;line-height:1.5;text-wrap:balance}.preview-secondary{font-size:20px;color:#c8c6c6;font-weight:500}.preview-captions .preview-primary{margin-top:13px;font-size:clamp(23px,3.1vw,34px);font-weight:650;letter-spacing:-.7px;color:#fff}
.preview-controls{display:flex;justify-content:center;align-items:center;gap:30px;padding:22px 30px;border-top:1px solid #2e292a;background:#181617}.demo-control{display:flex;align-items:center;justify-content:center;gap:8px;font-size:11px;color:#b5b1b2;white-space:nowrap}.demo-icon{width:18px;height:18px;flex-shrink:0}.demo-replay{background:#e50914;color:#fff;border-radius:7px;padding:11px 17px;gap:9px}.demo-replay kbd{background:rgba(0,0,0,.15);border:1px solid rgba(255,255,255,.2);padding:1px 4px;border-radius:3px;font-family:inherit;font-size:10px}.demo-slow{display:flex;align-items:center;gap:10px;border-left:1px solid #3c3436;padding-left:30px;font-size:11px;color:#a5a0a1}.demo-slow strong{font-size:13px;color:#e0dcdd;font-weight:500}.product-preview figcaption{margin:14px 0 0;text-align:center;color:#848080;font-size:10px;letter-spacing:.06em}
.feature-section{scroll-margin-top:40px;margin-bottom:84px}.feature-section>h2{max-width:700px;margin:0 0 40px;font-size:clamp(27px,3.2vw,38px);line-height:1.3;letter-spacing:-1.2px;text-wrap:balance}.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:34px}.feature{border-top:1px solid #3a2b2e;padding-top:24px}.feature-number{color:var(--accent);font-size:13px;font-weight:600;letter-spacing:.06em}.feature-tag{color:#929090;font-size:10px;letter-spacing:.03em;margin:17px 0 8px}.feature h3{font-size:21px;letter-spacing:-.4px;line-height:1.4;margin:0 0 14px;font-weight:600}.feature>p:last-child{color:var(--muted);font-size:14px;line-height:1.9;margin:0}
.home .tiers{margin:0 0 54px;gap:22px}.home .card,.home .pricing{border-radius:13px;padding:30px}.home .card h2{font-size:23px;letter-spacing:-.5px}.home .card .tier-note{font-size:12px;margin-bottom:23px}.home .card li{font-size:13px;line-height:1.85}.home .pricing{scroll-margin-top:30px}.home .pricing>h2{font-size:28px;margin-bottom:25px}.home .plans{grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.home .plan{background:#191919;padding:24px 20px;border-color:#333}.home .price{font-size:40px;margin:7px 0 2px}.home .pricing ul,.home .callout{font-size:13px;line-height:1.85}
@keyframes quiet-arrival{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@media(prefers-reduced-motion:no-preference){.hero,.product-preview{animation:quiet-arrival .7s ease-out both}.product-preview{animation-delay:.08s}.hero-actions a{transition:background-color .15s,border-color .15s}}
@media(max-width:650px){.hero{padding:58px 0 32px}.hero .eyebrow{font-size:10px;letter-spacing:.08em;margin-bottom:23px}.hero h1{font-size:clamp(38px,10vw,60px);letter-spacing:-1.8px;line-height:1.15;margin-bottom:22px}.hero .lead{font-size:16px;line-height:1.8;margin-bottom:27px}.hero-actions{gap:10px}.hero-actions a{font-size:13px;padding:10px 17px;gap:20px}.hero .status{font-size:10px;max-width:275px}.product-preview{margin-bottom:64px}.preview-window{border-radius:12px}.preview-topline{padding:14px 16px;font-size:10px;gap:9px}.preview-languages{display:none}.preview-scene{min-height:235px;padding:34px 17px}.preview-secondary{font-size:15px}.preview-captions .preview-primary{font-size:24px;letter-spacing:-.7px}.scene-orbit{width:300px;height:310px;top:-190px}.orbit-two{width:450px;height:350px;top:-230px}.preview-controls{gap:17px;padding:17px 13px}.demo-control{gap:0}.demo-control:not(.demo-replay)>span{display:none}.demo-icon{width:16px;height:16px}.demo-replay{gap:8px;font-size:10px;padding:10px 12px}.demo-replay kbd{display:none}.demo-slow{display:none}.product-preview figcaption{font-size:9px}.feature-section{margin-bottom:48px}.feature-section>h2{font-size:28px;letter-spacing:-.8px;margin-bottom:29px}.feature-grid{grid-template-columns:1fr;gap:28px}.feature{padding-top:18px}.feature-number{float:right;margin:0 0 8px 15px}.feature-tag{margin-top:0}.feature h3{font-size:21px;margin-bottom:10px}.feature>p:last-child{font-size:14px}.home .tiers{margin-bottom:34px;gap:16px}.home .card,.home .pricing{padding:23px}.home .plans{grid-template-columns:1fr;gap:12px}.home .plan{padding:20px}.home .pricing>h2{font-size:25px}.home .price{font-size:36px}.home .notice{font-size:12px}}