:root{font-family:'Segoe UI','Microsoft YaHei',sans-serif;color:#172b36;background:#fff;font-synthesis:none;scroll-behavior:smooth}
*{box-sizing:border-box}
body{margin:0;min-width:320px;line-height:1.7}
button,a{font:inherit}
a{color:inherit;text-decoration:none}
button{cursor:pointer}
img{display:block;max-width:100%}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{letter-spacing:-.035em;line-height:1.25}
.container{width:min(1180px,calc(100% - 48px));margin-inline:auto}
.skip-link{position:absolute;z-index:50;top:-80px;left:20px;padding:10px 16px;background:#fff;color:#10212d}
.skip-link:focus{top:12px}
:focus-visible{outline:3px solid #37c9ce;outline-offset:3px}
.site-header{position:relative;z-index:5;background:#0d1b28;color:#f4fafb;border-bottom:1px solid #243644}
.header-inner{height:82px;display:flex;align-items:center;gap:42px}
.wordmark{display:inline-flex;align-items:center;gap:11px;font-weight:700;font-size:22px;letter-spacing:-.055em;white-space:nowrap}
.wordmark img{border-radius:10px}
.wordmark-accent,.footer-brand span{color:#4ad3cb}
.nav{display:flex;align-items:center;gap:30px;margin-left:auto}
.nav a{font-size:14px;color:#bfd0d9;transition:color .2s}
.nav a:hover,.header-cta:hover,.nav a[aria-current="page"]{color:#fff}
.header-cta{margin-left:14px;padding:9px 0;border-bottom:1px solid #4ad3cb;color:#dffcf8;font-size:14px;font-weight:700;white-space:nowrap}
.header-cta span{padding-left:8px;color:#4ad3cb}
.hero{overflow:hidden;position:relative;background:radial-gradient(circle at 72% 35%,#183746 0,#0d1b28 37%,#0d1b28 100%);color:#fff}
.hero:before{content:"";position:absolute;inset:auto -20% -230px 30%;height:340px;transform:rotate(-12deg);background:linear-gradient(90deg,transparent,#0d6871,transparent);filter:blur(110px);opacity:.35}
.hero-grid{min-height:638px;display:grid;grid-template-columns:1fr .95fr;align-items:center;gap:56px;padding-block:84px 105px;position:relative}
.hero-copy{position:relative;z-index:1}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;border:1px solid #35606a;border-radius:99px;padding:7px 14px;color:#91dedc;font-size:11px;letter-spacing:.15em;font-weight:700}
.pulse-dot{width:7px;height:7px;border-radius:50%;background:#57d9ca;box-shadow:0 0 0 4px #57d9ca22}
.hero h1{font-size:clamp(42px,5vw,76px);line-height:1.1;margin:26px 0 24px;letter-spacing:-.045em;font-weight:700}
/* fit-content keeps the gradient box on the glyphs: as a plain block the box spans
   the whole column, so the text would only ever show the gradient's leading edge. */
.hero h1 em{display:block;width:fit-content;margin-top:8px;font-style:normal;color:#4fd3c4}
/* Gradient headline, kept in the site's teal family. The sweep needs a real
   lightness range (deep teal -> pale mint -> teal) or it reads as one flat colour.
   Guarded: a browser that clips the background but not the text fill keeps the
   solid teal above rather than rendering nothing. */
@supports ((-webkit-background-clip:text) or (background-clip:text)){
.hero h1 em{background:linear-gradient(90deg,#178f91 0%,#4ad3cf 30%,#a9ece2 55%,#5ed9c8 78%,#2ab5a8 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
}
.hero-lead{max-width:580px;color:#c0d0d7;font-size:19px;line-height:1.85;margin-bottom:34px}
.hero-lead-line{display:block;color:#e2eef2;font-weight:600}
.hero-actions{display:flex;gap:13px;flex-wrap:wrap}
.button{min-height:51px;display:inline-flex;align-items:center;justify-content:center;gap:25px;padding:11px 22px;border-radius:8px;font-weight:700;font-size:14px;transition:transform .2s,background .2s}
.button:hover:not(:disabled){transform:translateY(-2px)}
.button-primary{color:#10232b;background:#66d8ce;border:1px solid #66d8ce}
.button-primary:hover{background:#8ceae0}
.button-quiet{border:1px solid #50626d;color:#f0fbfb}
.button-quiet:hover{background:#ffffff12}
.hero-visual{position:relative;max-width:550px;width:100%;justify-self:end}
.visual-glow{position:absolute;inset:4% 0 6%;background:#1eb5b5;filter:blur(110px);opacity:.21}
.visual-card{position:relative;transform:rotate(1.5deg);border:1px solid #55707e;border-radius:19px;background:linear-gradient(145deg,#233846,#152a37 55%,#132836);box-shadow:0 34px 75px #030c1399,0 0 0 8px #ffffff08;overflow:hidden}
.visual-topline{display:flex;align-items:center;gap:14px;height:57px;padding:0 22px;border-bottom:1px solid #ffffff16;font-size:12px;color:#b5c9d1}
.window-dots{display:flex;gap:5px}.window-dots i{width:7px;height:7px;border-radius:50%;background:#68828e}.window-dots i:first-child{background:#66d8ce}
.visual-ready{margin-left:auto;color:#8adcd3;font-size:11px}
.visual-stage,.visual-destination{display:flex;align-items:center;gap:16px;margin:30px 32px 0;padding:19px;border-radius:12px;border:1px solid #547080;background:#ffffff08}
.visual-icon,.destination-mark{display:grid;place-items:center;width:48px;height:48px;flex:none;border-radius:10px;background:#67d8ce20;color:#78e5da;font-size:26px}
.visual-stage small,.visual-destination small{display:block;color:#98afba;font-size:11px;margin-bottom:2px}
.visual-stage strong,.visual-destination strong{display:block;font-size:14px;color:#f4fbfc;font-weight:600}
.visual-link{display:flex;align-items:center;gap:10px;width:160px;margin:15px 0 15px 56px;color:#92c5c7;font-size:11px}.visual-link span:first-child,.visual-link span:last-child{height:1px;flex:1;background:#4e8b91}
.visual-destination{margin-top:0}.destination-mark{background:#e8dcff1f;color:#cbb8f9}
.status-pill{margin-left:auto;background:#3bcab422;border-radius:99px;color:#82e6d8;padding:5px 9px;white-space:nowrap;font-size:10px}
.visual-code{display:flex;justify-content:space-between;gap:15px;margin:30px 32px;padding:13px 0 2px;color:#a8c0ca;font-size:11px;border-top:1px solid #ffffff1d}.visual-code code{color:#b9e7e4;white-space:nowrap}
.visual-caption{text-align:center;color:#8ba5af;font-size:11px;margin:22px 0 0}
.proof-band{background:#ecf5f5;border-bottom:1px solid #d8e6e7}
.proof-grid{display:grid;grid-template-columns:repeat(3,1fr)}
.proof-grid p{display:flex;align-items:center;gap:18px;margin:0;padding:26px 26px 26px 0;border-right:1px solid #d4e3e4}.proof-grid p:last-child{border:0;padding-left:28px}.proof-grid p:nth-child(2){padding-left:28px}
.proof-grid strong{font-size:13px;color:#178f91;font-weight:700}.proof-grid span{font-size:14px;font-weight:700;line-height:1.4}.proof-grid small{color:#687e88;font-size:12px;font-weight:400}
.section{padding:110px 0}
.eyebrow{margin-bottom:14px;color:#0b8d90;font-size:11px;font-weight:700;letter-spacing:.2em}
.section h2{font-size:clamp(31px,3.4vw,46px);margin-bottom:18px}
.section-intro{max-width:665px;margin-bottom:46px}.section-intro>p:last-child{font-size:16px;color:#647983;margin-bottom:0}
.how-section{background:#f7faf9}
.step-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step-card{min-height:285px;background:#fff;border:1px solid #e2eceb;border-radius:15px;padding:28px;box-shadow:0 10px 28px #142c2c08}
.step-num{font-size:11px;font-weight:700;color:#178f91;letter-spacing:.1em}.step-symbol{display:grid;place-items:center;width:47px;height:47px;margin:31px 0 23px;border-radius:11px;background:#e6f6f4;color:#148888;font-size:25px}
.step-card h3{font-size:20px;margin-bottom:10px}.step-card p{color:#607581;font-size:14px;margin:0}
.comparison-scroll{overflow:hidden;border:1px solid #dce8e8;border-radius:15px;background:#fff}
.comparison-table{width:100%;table-layout:fixed;border-collapse:collapse;text-align:left}
.comparison-table caption{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
.comparison-table th,.comparison-table td{padding:16px 25px;border-bottom:1px solid #e3ecec;font-size:14px;vertical-align:middle}
.comparison-table th:first-child{width:42%}
.comparison-table thead th{background:#edf4f6;color:#516b74;font-size:13px;font-weight:700}
.comparison-table thead th:not(:first-child),.comparison-table tbody td{text-align:center}
.comparison-table tbody th{font-weight:700;color:#1b343e}.comparison-table tbody tr:last-child th,.comparison-table tbody tr:last-child td{border-bottom:0}
.comparison-table th:last-child,.comparison-table td:last-child{background:#effaf8}
.comparison-table thead th:last-child{color:#0b686a}
/* "聊天" is the one capability both columns share. Only the two value cells take the
   tint (matching the CodexLink column below); the row label stays white so the row
   reads as shared rather than as a highlighted CodexLink advantage. */
.comparison-table tbody tr.row-shared td{background:#effaf8}
.capability-icon{display:inline-grid;place-items:center;width:29px;height:29px;border-radius:50%;font-size:22px;font-weight:700;line-height:1}
.capability-icon.yes{background:#e4f5ed;color:#087a59}
.capability-icon.no{background:#fdecec;color:#b73333}
.comparison-note{margin:16px 0 0;color:#647983;font-size:13px}
.text-link{font-size:14px;font-weight:700;color:#087f8c;border-bottom:1px solid #087f8c;padding-bottom:3px}.text-link span{padding-left:5px}
.purchase-section{background:#10212e;color:#f7fbfb;position:relative;overflow:hidden}.purchase-section:before{content:"";position:absolute;left:-100px;bottom:-300px;width:600px;height:600px;border-radius:50%;background:#087f8c;filter:blur(140px);opacity:.18}
.purchase-grid{position:relative;display:grid;grid-template-columns:1fr 440px;gap:80px;align-items:center}
/* Scoped to the purchase block so the other sections keep the shared .section h2 size.
   fit-content keeps the gradient box on the glyphs; a full-width block would only
   ever show the sweep's leading edge. */
.purchase-copy h2{max-width:600px;width:fit-content;font-size:clamp(40px,4.6vw,66px);color:#f7fbfb}
/* A light teal sweep. The whole range stays in-colour: starting from white made the
   first characters read as plain white, so only the tail looked gradient.
   Guarded: a browser that clips the background but not the text fill keeps the solid
   colour above instead of rendering nothing. */
@supports ((-webkit-background-clip:text) or (background-clip:text)){
.purchase-copy h2{background:linear-gradient(92deg,#e8fbf8 0%,#b9ebe5 35%,#8ce0d6 70%,#5ed9c8 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
}
.purchase-copy>p:not(.eyebrow){max-width:515px;color:#b6cbd2;font-size:16px}.purchase-section .eyebrow{color:#72ded4}
.purchase-note{display:flex;gap:14px;align-items:flex-start;max-width:515px;padding:19px 20px;margin-top:42px;border:1px solid #3d5963;border-radius:11px;background:#ffffff08;color:#c4d7db;font-size:13px}.purchase-note>span:first-child{color:#72ded4;font-size:18px}
.price-card{padding:34px;border-radius:17px;background:#fff;color:#172b36;box-shadow:0 24px 75px #0004}.price-top{display:flex;justify-content:space-between;align-items:center;font-weight:700;font-size:15px}.preview-pill{color:#167d80;background:#e2f5f2;border-radius:99px;padding:5px 9px;font-size:11px}.price{margin:25px 0 4px;font-size:70px;font-weight:700;line-height:1;letter-spacing:-.06em}.price>span{font-size:34px;vertical-align:17px;margin-right:4px}.price small{font-size:14px;color:#6e8189;letter-spacing:0;font-weight:400}.price-description{color:#647b83;font-size:13px;padding-bottom:20px;border-bottom:1px solid #e7eeee}.price-features{padding:4px 0 8px;list-style:none}.price-features li{position:relative;padding:8px 0 8px 25px;font-size:13px}.price-features li:before{content:'✓';position:absolute;left:0;color:#0d918c;font-weight:700}.purchase-disabled{width:100%;background:#c6dcda;border:0;color:#426b6f;cursor:not-allowed}.price-footnote{margin:12px 0 0;color:#788c93;text-align:center;font-size:11px}
.faq-grid{display:grid;grid-template-columns:.66fr 1fr;gap:90px}.faq-grid>div:first-child>p:last-child{max-width:320px;color:#697f87;font-size:14px}.faq-list{border-top:1px solid #d8e5e5}.faq-list details{border-bottom:1px solid #d8e5e5;padding:20px 0}.faq-list summary{cursor:pointer;list-style:none;font-weight:700;font-size:15px;padding-right:30px;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:'+';position:absolute;right:0;top:0;color:#1c9596;font-size:20px;font-weight:400}.faq-list details[open] summary:after{content:'−'}.faq-list p{margin:13px 25px 0 0;color:#657b84;font-size:14px}
.site-footer{background:#0d1b28;color:#b4c7d0;padding:55px 0}.footer-inner{display:flex;justify-content:space-between;gap:40px}.footer-brand{font-size:23px;color:#fff;font-weight:700;letter-spacing:-.05em}.footer-inner p{font-size:12px;margin:10px 0 0}.footer-inner>div:last-child{text-align:right}
.footer-support a{color:#8fd8d4;border-bottom:1px solid #3d5963}.footer-support a:hover{color:#fff}
.footer-legal{margin-top:12px;font-size:12px}.footer-legal a{color:#8fd8d4;border-bottom:1px solid #3d5963}.footer-legal a:hover{color:#fff}.footer-legal span{color:#7e949d;padding:0 6px}
.footer-icp{margin-top:12px;font-size:12px;color:#a9bcc4}.footer-icp a{color:#a9bcc4;border-bottom:1px solid #3d5963}.footer-icp a:hover{color:#fff}
.legal-page{background:#f8faf9;min-height:100vh}
.legal-main{padding:56px 0 78px}
.legal-doc{max-width:830px;margin-inline:auto;background:#fff;border:1px solid #e1eae9;border-radius:15px;padding:52px 56px;box-shadow:0 10px 28px #142c2c08}
.legal-doc h1{font-size:clamp(27px,3vw,36px);margin-bottom:8px}
.legal-meta{color:#5b707a;font-size:13px;margin-bottom:32px;padding-bottom:22px;border-bottom:1px solid #e7eeee}
.legal-doc h2{font-size:19px;margin:36px 0 12px}
.legal-doc h3{font-size:15px;margin:22px 0 8px;color:#1b343e}
.legal-doc p,.legal-doc li{color:#4f636b;font-size:14.5px;line-height:1.85}
.legal-doc ul,.legal-doc ol{padding-left:22px;margin:10px 0}
.legal-doc li{margin-bottom:7px}
.legal-doc code{background:#eef4f3;border-radius:5px;padding:2px 6px;font-size:13px;color:#1b4d4f}
.legal-doc a{color:#087f8c;border-bottom:1px solid #087f8c}
.legal-callout{margin:26px 0;padding:18px 22px;border-left:3px solid #0d9393;background:#f1f8f7;border-radius:0 10px 10px 0}
.legal-callout p{margin:0}
.legal-back{display:inline-block;margin-top:38px}
.offer{padding:26px 28px;border:1px solid #d9e8e6;border-radius:13px;background:#f6fbfa}.legal-doc .offer-name{margin:0;color:#172b36;font-size:15px;font-weight:700}.legal-doc .offer .price{margin:16px 0 10px;color:#172b36;font-size:50px;line-height:1}.offer .price>span{font-size:26px;vertical-align:12px}.offer .price-features{padding-left:0;margin:0 0 18px}.legal-doc .offer .price-features li{margin:0;color:#172b36;font-size:13.5px;line-height:1.6}.legal-doc .offer .price-footnote{color:#788c93;font-size:12px;line-height:1.6}
.result-page{min-height:100vh;display:grid;place-items:center;padding:24px;background:#edf5f4}.result-card{width:min(570px,100%);padding:50px;background:#fff;border:1px solid #dbe9e8;border-radius:16px;box-shadow:0 20px 60px #12323a0c}.result-card img{border-radius:12px;margin-bottom:30px}.result-card h1{font-size:35px}.result-card>p:not(.eyebrow){color:#5d737b}.result-card .text-link{display:inline-block;margin-top:18px}
@media(max-width:1050px){.nav{gap:16px}.header-cta{display:none}.hero-grid{gap:30px}.visual-card{transform:none}.purchase-grid{gap:38px;grid-template-columns:1fr 400px}}
@media(max-width:760px){.container{width:min(100% - 36px,540px)}.header-inner{height:auto;min-height:75px;flex-wrap:wrap;gap:0;padding-block:14px}.nav{order:2;width:100%;overflow-x:auto;margin:15px 0 0;gap:20px;padding-bottom:2px;white-space:nowrap}.nav a{font-size:12px}.hero-grid{grid-template-columns:1fr;min-height:0;gap:55px;padding-block:70px 68px}.hero h1{font-size:clamp(38px,11vw,58px)}.hero-lead{font-size:17px}.hero-visual{justify-self:center}.visual-card{max-width:500px}.proof-grid{grid-template-columns:1fr}.proof-grid p,.proof-grid p:nth-child(2),.proof-grid p:last-child{padding:16px 0;border-right:0;border-bottom:1px solid #d4e3e4}.proof-grid p:last-child{border-bottom:0}.section{padding:75px 0}.step-grid,.purchase-grid,.faq-grid{grid-template-columns:1fr}.purchase-grid,.faq-grid{gap:35px}.step-card{min-height:0}.price-card{max-width:480px}.footer-inner{display:block}.footer-inner>div:last-child{text-align:left;margin-top:28px}}
@media(max-width:760px){.comparison-scroll{overflow:visible;border:0;background:transparent}.comparison-table{display:block;min-width:0}.comparison-table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.comparison-table tbody{display:grid;gap:13px}.comparison-table tbody tr{display:grid;grid-template-columns:1fr 1fr;overflow:hidden;border:1px solid #dce8e8;border-radius:12px;background:#fff}.comparison-table tbody th:first-child{grid-column:1/-1;width:100%;background:#edf4f4;padding:13px 16px;font-size:14px}.comparison-table tbody td{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:85px;padding:10px 16px;border-bottom:0;font-size:13px}.comparison-table tbody td:last-child{border-left:1px solid #e3ecec}.comparison-table tbody td::before{display:block;margin-bottom:7px;color:#627a83;font-size:11px;font-weight:700}.comparison-table tbody td:nth-child(2)::before{content:'ChatGPT 网页聊天'}.comparison-table tbody td:nth-child(3)::before{content:'加持了 CodexLink 后'}}
@media(max-width:760px){.legal-doc{padding:32px 22px;border-radius:12px}.legal-main{padding:34px 0 56px}.footer-legal,.footer-icp,.footer-support{text-align:left}}
@media(max-width:420px){.hero-actions{display:grid}.button{width:100%}.visual-stage,.visual-destination{margin-left:17px;margin-right:17px;padding:13px}.visual-code{margin-left:17px;margin-right:17px}.visual-stage strong,.visual-destination strong{font-size:12px}.status-pill{display:none}.price-card{padding:24px}.result-card{padding:30px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}.button,.nav a{transition:none}}
.purchase-link{width:100%}
.legal-doc a.purchase-link{color:#10232b;border:1px solid #66d8ce}
.price-footnote a{color:#087f8c;border-bottom:1px solid #087f8c}
.legal-doc code.hash{word-break:break-all}