:root{color-scheme:light dark;--bg:#f7f8f5;--surface:#fff;--ink:#17241e;--muted:#5c6b62;--line:#dce5dc;--green:#247a52;--green-dark:#185d3d;--mint:#dff3e6;--soft:#edf4ee;--amber:#fff2d5;--shadow:0 24px 65px rgba(22,54,35,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang TC","PingFang SC","Microsoft JhengHei","Noto Sans CJK TC",sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}a{color:inherit}img,video{max-width:100%}button,select{font:inherit}button{cursor:pointer}.wrap{width:min(1180px,calc(100% - 48px));margin:auto}.site-header{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;gap:32px;min-height:72px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;letter-spacing:-.03em;font-size:1.15rem;white-space:nowrap}.brand img{width:34px;height:34px;border-radius:9px}.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}.nav-links a{text-decoration:none;color:var(--muted);font-size:.92rem;font-weight:650}.nav-links a:hover,.nav-links a[aria-current]{color:var(--green)}.lang{appearance:none;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:999px;padding:8px 28px 8px 13px;max-width:135px;cursor:pointer}.nav-actions{display:flex;align-items:center;gap:12px}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:13px 22px;background:var(--green);color:#fff;text-decoration:none;font-weight:750;line-height:1.3;border:1px solid var(--green);transition:transform .2s,background .2s}.button:hover{background:var(--green-dark);transform:translateY(-2px)}.button.secondary{background:var(--surface);color:var(--ink);border-color:var(--line)}.button.secondary:hover{background:var(--soft)}.button.disabled{background:#d8ded9;color:#69756d;border-color:#d8ded9;pointer-events:none}.button.small{padding:9px 16px;font-size:.9rem}.eyebrow{text-transform:uppercase;letter-spacing:.15em;color:var(--green);font-size:.76rem;font-weight:850;margin:0 0 14px}.hero{padding:88px 0 96px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1fr 1.02fr;align-items:center;gap:64px}.hero-copy{max-width:590px}.hero h1{font-size:clamp(3.25rem,6vw,5.7rem);line-height:1.14;letter-spacing:-.065em;margin:0 0 25px}.accent{color:var(--green)}.lead{font-size:clamp(1.08rem,1.6vw,1.25rem);color:var(--muted);line-height:1.85;margin:0}.hero .lead{max-width:580px}.cta-row{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin:30px 0 15px}.micro{font-size:.86rem;color:var(--muted);margin:0}.hero-art{position:relative;background:radial-gradient(circle at 40% 35%,#d4f4dc 0,#e8f4e8 40%,#e6efe6 100%);border-radius:36px;padding:34px;min-width:0;box-shadow:var(--shadow)}.hero-art:before{content:"";position:absolute;width:170px;height:170px;border-radius:50%;background:#b5e6bd;filter:blur(32px);top:-25px;right:20px;opacity:.6}.video-card{position:relative;overflow:hidden;border-radius:20px;background:#121a15;box-shadow:0 25px 55px rgba(18,42,24,.24);border:7px solid #202b24}.video-card video{display:block;width:100%;aspect-ratio:16/9;object-fit:cover}.video-caption{display:flex;justify-content:space-between;gap:12px;font-size:.77rem;color:#49614f;margin-top:17px;font-weight:700}.floating-note{position:absolute;left:-24px;bottom:-34px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);padding:14px 18px;border-radius:17px;font-size:.9rem;font-weight:700;max-width:235px}.floating-note span{color:var(--green)}section{padding:100px 0}.section-soft{background:var(--soft)}.section-heading{max-width:720px;margin:0 auto 42px;text-align:center}.section-heading h2,.split h2{font-size:clamp(2.2rem,4vw,3.65rem);line-height:1.25;letter-spacing:-.055em;margin:0 0 20px}.section-heading p:not(.eyebrow),.split p:not(.eyebrow){font-size:1.08rem;color:var(--muted);margin:0}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:30px;min-width:0}.card-icon{display:grid;place-items:center;width:46px;height:46px;background:var(--mint);border-radius:14px;color:var(--green);font-size:1.3rem;font-weight:800;margin-bottom:24px}.card h3{font-size:1.22rem;line-height:1.4;margin:0 0 10px;letter-spacing:-.025em}.card p{margin:0;color:var(--muted);font-size:.96rem}.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:80px}.split.reverse .visual{order:-1}.visual{border-radius:32px;background:#e2eee5;padding:22px;box-shadow:var(--shadow)}.visual img{width:100%;display:block;border-radius:17px;box-shadow:0 12px 36px rgba(19,52,31,.13)}.visual figcaption{font-size:.81rem;color:#55705a;padding:15px 4px 1px}.visual.warning{background:#f8efdc}.visual.training{background:#deefe4}.feature-list{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:13px}.feature-list li{position:relative;padding-left:27px;color:var(--muted)}.feature-list li:before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:900}.quote-card{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow)}.quote-label{font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:800}.quote-text{font-size:1.15rem;line-height:1.65;margin:10px 0 20px}.quote-result{background:var(--amber);padding:16px 18px;border-radius:13px;font-size:.98rem}.quote-result strong{display:block;color:#916612;font-size:.82rem;margin-bottom:5px}.training-panel{background:linear-gradient(135deg,#143d2b,#27754b);border-radius:30px;padding:38px;color:#fff;box-shadow:var(--shadow)}.training-panel .step{display:flex;align-items:center;gap:16px;padding:17px 0;border-bottom:1px solid #ffffff2c}.training-panel .step:last-child{border:0}.training-panel .num{flex:none;width:36px;height:36px;display:grid;place-items:center;border-radius:50%;background:#ffffff24;font-weight:800}.training-panel small{display:block;color:#c6e2cd;font-size:.82rem}.training-panel strong{display:block;font-size:1.03rem}.provider-list{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px}.provider-list span{padding:8px 13px;border:1px solid var(--line);border-radius:999px;background:var(--surface);font-size:.83rem;font-weight:700}.privacy-band{background:#163b2a;color:white}.privacy-band .eyebrow{color:#9bdfad}.privacy-band .section-heading p{color:#c3d9c8}.privacy-band .card{background:#ffffff0d;border-color:#ffffff27}.privacy-band .card p{color:#c3d9c8}.privacy-band .card-icon{background:#ffffff19;color:#a7e8b6}.teaser{display:grid;grid-template-columns:1fr 260px;align-items:center;gap:40px;background:var(--mint);border-radius:32px;padding:50px 7%;overflow:hidden}.teaser h2{font-size:clamp(2.2rem,4vw,3.2rem);letter-spacing:-.05em;line-height:1.2;margin:0 0 18px}.teaser p{color:var(--muted);max-width:580px;margin:0 0 25px}.teaser img{width:220px;max-height:400px;object-fit:cover;object-position:top;border:6px solid #20352a;border-radius:30px;transform:rotate(5deg);box-shadow:var(--shadow)}.faq{max-width:840px;margin:auto}.faq details{border-bottom:1px solid var(--line);padding:20px 2px}.faq summary{font-size:1.08rem;font-weight:750;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:"+";color:var(--green);font-size:1.3rem;line-height:1}.faq details[open] summary:after{content:"−"}.faq details p{color:var(--muted);margin:12px 34px 2px 0}.final-cta{text-align:center;background:var(--soft)}.final-cta h2{font-size:clamp(2.3rem,4vw,3.8rem);line-height:1.2;letter-spacing:-.05em;margin:0 0 18px}.final-cta p{color:var(--muted);margin:0 0 26px}.footer{padding:36px 0;border-top:1px solid var(--line);color:var(--muted);font-size:.85rem}.footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px}.footer a{text-decoration:none}.footer a:hover{text-decoration:underline}.iphone-hero{padding-bottom:50px}.phone-art{display:flex;justify-content:center;background:radial-gradient(circle,#c9eddb,#e8f4e8);border-radius:34px;padding:40px}.phone-art img{display:block;width:min(250px,80%);border:7px solid #1b2b21;border-radius:36px;box-shadow:0 28px 55px #274d3560}.phone-media{display:grid;grid-template-columns:240px 1fr;align-items:center;gap:70px}.phone-video{max-width:240px;margin:auto;overflow:hidden;border:7px solid #1b2b21;border-radius:34px;box-shadow:var(--shadow)}.phone-video video{display:block;width:100%}.screen-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.screen-grid figure{margin:0;background:var(--surface);padding:12px;border-radius:20px;border:1px solid var(--line)}.screen-grid img{display:block;border-radius:11px}.screen-grid figcaption{text-align:center;font-size:.86rem;font-weight:700;padding:10px 0 2px}.steps{max-width:840px;margin:auto;counter-reset:step}.steps li{list-style:none;position:relative;padding:0 0 30px 72px;border-left:2px solid var(--line);margin-left:21px}.steps li:last-child{border-left-color:transparent;padding-bottom:0}.steps li:before{counter-increment:step;content:counter(step);position:absolute;left:-23px;top:0;width:42px;height:42px;display:grid;place-items:center;background:var(--green);color:#fff;border-radius:50%;font-weight:800}.steps h3{margin:0 0 5px;font-size:1.16rem}.steps p{margin:0;color:var(--muted)}.note-box{background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--green);border-radius:15px;padding:20px 24px;color:var(--muted);margin-top:26px}.note-box strong{color:var(--ink)}
@media(max-width:900px){.nav-links{gap:14px}.nav-links a{font-size:.84rem}.nav{gap:14px}.hero-grid,.split{gap:35px}.hero h1{font-size:clamp(2.8rem,6vw,4rem)}.floating-note{left:4px;bottom:-24px}.card-grid{grid-template-columns:repeat(2,1fr)}.phone-media{gap:30px}}
@media(max-width:680px){.wrap{width:min(100% - 32px,500px)}.nav{min-height:66px;flex-wrap:wrap;gap:0;padding:9px 0}.brand{font-size:1rem}.brand img{width:30px;height:30px}.nav-actions{margin-left:auto;gap:7px}.nav-actions .button{display:none}.lang{max-width:104px;font-size:.79rem;padding:6px 20px 6px 9px}.nav-links{order:3;width:100%;justify-content:center;margin:8px 0 0;padding-top:8px;border-top:1px solid var(--line)}.hero{padding:58px 0 75px}.hero-grid,.split,.teaser,.phone-media{grid-template-columns:1fr;gap:36px}.hero h1{font-size:clamp(2.75rem,12vw,4rem)}.hero-art{padding:18px;border-radius:24px}.floating-note{position:static;margin-top:15px;max-width:none}.video-caption{font-size:.68rem}section{padding:72px 0}.section-heading{margin-bottom:30px}.card-grid{grid-template-columns:1fr}.card{padding:25px}.split.reverse .visual{order:0}.visual{margin:0;padding:14px;border-radius:24px}.teaser{padding:35px 30px;text-align:center}.teaser img{margin:auto;max-height:320px;object-position:top}.screen-grid{grid-template-columns:repeat(2,1fr)}.phone-media{text-align:center}.phone-video{width:220px}.footer .wrap{justify-content:center;text-align:center}.steps li{padding-left:52px}.phone-art{padding:27px}.iphone-hero{padding-bottom:20px}}
@media(prefers-color-scheme:dark){:root{--bg:#101813;--surface:#19251d;--ink:#eef6ee;--muted:#b3c2b6;--line:#344437;--green:#73cf96;--green-dark:#55b77b;--mint:#233f2e;--soft:#17291d;--amber:#4a3820;--shadow:0 24px 65px rgba(0,0,0,.28)}.button{color:#102316}.button.disabled{background:#39463c;color:#a5b1a6;border-color:#39463c}.hero-art,.phone-art{background:radial-gradient(circle at 40% 35%,#284b32,#1d3023)}.hero-art:before{background:#3c7951}.video-caption{color:#bfd6c2}.visual{background:#25402d}.visual.warning{background:#45371f}.visual.training{background:#25402d}.quote-result{color:#f7e5be}.quote-result strong{color:#ffd388}.training-panel{background:linear-gradient(135deg,#173e2a,#245e3d)}.privacy-band{background:#0b2015}.teaser{background:#223d2c}.teaser p{color:#bfd0c2}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.learning-section{background:linear-gradient(145deg,#e4f3e7 0%,#f5f8f3 65%);padding:108px 0}.learning-intro{max-width:830px;margin:0 auto 42px;text-align:center}.learning-intro h2{font-size:clamp(2.55rem,4.8vw,4.7rem);line-height:1.17;letter-spacing:-.06em;margin:0 0 20px}.learning-intro>p:last-child{font-size:1.14rem;color:var(--muted);margin:0 auto;max-width:700px}.learning-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.learning-step{background:var(--surface);border:1px solid var(--line);border-radius:25px;padding:30px;box-shadow:0 16px 36px rgba(22,54,35,.06)}.learning-step .num{display:grid;place-items:center;width:48px;height:48px;border-radius:15px;background:var(--green);color:#fff;font-weight:850;margin-bottom:26px}.learning-step h3{font-size:1.38rem;line-height:1.3;letter-spacing:-.03em;margin:0 0 12px}.learning-step p{color:var(--muted);margin:0}.learning-assurance{display:flex;align-items:center;justify-content:space-between;gap:28px;background:#153e2a;color:#fff;border-radius:25px;padding:28px 34px;margin-top:18px}.learning-assurance strong{font-size:1.13rem}.learning-assurance p{color:#d0e6d6;margin:5px 0 0}.learning-tags{display:flex;flex-wrap:wrap;gap:8px;flex:none}.learning-tags span{border:1px solid #ffffff50;border-radius:999px;padding:6px 12px;font-size:.87rem;white-space:nowrap}.ai-section .wrap{max-width:850px}.ai-section .provider-list{justify-content:center}.ai-section .micro{text-align:center}
@media(max-width:900px){.learning-steps{gap:12px}.learning-step{padding:24px}.learning-assurance{align-items:flex-start;flex-direction:column}.learning-tags{flex:none}}
@media(max-width:680px){.learning-section{padding:75px 0}.learning-intro{text-align:left;margin-bottom:30px}.learning-steps{grid-template-columns:1fr}.learning-step .num{margin-bottom:16px}.learning-assurance{padding:25px}.learning-tags span{font-size:.8rem}}
@media(prefers-color-scheme:dark){.learning-section{background:linear-gradient(145deg,#183322,#142017 70%)}.learning-step{box-shadow:none}.learning-assurance{background:#244e33}.learning-assurance p{color:#d2e7d6}}

/* Mac homepage demo */
.mac-hero{padding:64px 0 86px}
.mac-hero .hero-grid{display:flex;flex-direction:column;gap:40px}
.mac-hero .hero-copy{max-width:850px;text-align:center}
.mac-hero h1{margin-bottom:18px}
.mac-hero .lead{max-width:760px;margin:auto}
.mac-hero .cta-row{justify-content:center;margin:24px 0 13px}
.mac-hero .hero-art{width:min(100%,1080px);padding:13px 13px 12px;border:1px solid #385043;border-radius:28px;background:#17241e;box-shadow:0 28px 70px rgba(16,38,24,.2)}
.mac-hero .hero-art:before,.mac-hero .floating-note{display:none}
.mac-hero .video-card{border:1px solid #405347;border-radius:19px;background:#0b110e;box-shadow:none}
.mac-hero .video-card video{width:100%;aspect-ratio:16/9;object-fit:contain;background:#0b110e}
.mac-hero .video-sound{position:absolute;right:16px;top:16px;border:1px solid #ffffff8c;border-radius:999px;padding:7px 13px;background:#0c211ad9;color:#fff;font-size:.82rem;font-weight:700;line-height:1.4;backdrop-filter:blur(8px)}
.mac-hero .video-sound:hover{background:#20583d}
.mac-hero .video-caption{margin:10px 6px 0;color:#c8dacf;font-size:.79rem}

/* Context aware rewrite examples */
.context-section{padding:82px 0;background:var(--bg)}
.context-section .wrap{max-width:1000px}
.context-heading{max-width:760px;margin:0 auto 28px;text-align:center}
.context-heading h2{font-size:clamp(2rem,3.6vw,3.25rem);line-height:1.22;letter-spacing:-.05em;margin:0 0 15px}
.context-heading>p:last-child{font-size:1.05rem;color:var(--muted);margin:0}
.context-source{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:8px 15px;margin:0 auto 18px;color:var(--muted);font-size:.91rem}
.context-source strong{color:var(--ink);font-size:1rem;font-weight:700}
.context-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.context-card{min-width:0;padding:25px 28px 30px;border:1px solid var(--line);border-radius:22px;background:var(--surface);box-shadow:0 12px 32px rgba(22,54,35,.05)}
.context-card-head{display:flex;align-items:center;flex-wrap:wrap;gap:10px;padding-bottom:16px;border-bottom:1px solid var(--line);color:var(--muted);font-size:.83rem;font-weight:700}
.context-app{padding:3px 11px;border-radius:999px;background:var(--mint);color:var(--green-dark);font-size:.83rem;font-weight:800}
.context-app.line-app{background:#e5f8e6;color:#247237}
.context-card p{margin:19px 0 0;font-size:1rem;line-height:1.8;overflow-wrap:anywhere}
.context-note{text-align:center;color:var(--muted);font-size:.82rem;margin:18px 0 0}
@media(max-width:680px){.mac-hero{padding:42px 0 64px}.mac-hero .hero-grid{gap:29px}.mac-hero .hero-copy{text-align:left}.mac-hero .lead{margin:0}.mac-hero .cta-row{justify-content:flex-start}.mac-hero .hero-art{padding:6px 6px 9px;border-radius:19px}.mac-hero .video-card{border-radius:13px}.mac-hero .video-sound{top:8px;right:8px;padding:5px 9px;font-size:.72rem}.mac-hero .video-caption{font-size:.68rem;line-height:1.4;flex-wrap:wrap;margin:8px 5px 0}.context-section{padding:66px 0}.context-heading{text-align:left}.context-source{justify-content:flex-start}.context-grid{grid-template-columns:1fr;gap:12px}.context-card{padding:22px}}
@media(prefers-color-scheme:dark){.context-card{box-shadow:none}.context-app.line-app{background:#23452a;color:#a6e4b0}}
@media(max-width:680px){.mac-hero .hero-grid{gap:0}.mac-hero .hero-copy{display:contents}.mac-hero .hero-copy .eyebrow{order:0;width:100%}.mac-hero h1{order:1;width:100%;margin-bottom:24px}.mac-hero .hero-art{order:2;margin-bottom:25px}.mac-hero .lead{order:3;width:100%}.mac-hero .cta-row{order:4;width:100%;margin:24px 0 13px}.mac-hero .micro{order:5;width:100%}}

/* 避免標題、段落最後一行只剩一兩個字 */
h1,h2,h3,.quote-text{text-wrap:balance}
p,li,figcaption,summary{text-wrap:pretty}

/* 內頁的精簡頁首（首頁才用大標題） */
.page-head{padding:56px 0 44px;border-bottom:1px solid var(--line)}
.page-head h1{font-size:clamp(1.9rem,3.2vw,2.6rem);line-height:1.3;letter-spacing:-.03em;margin:0 0 14px}
.page-head .lead{font-size:1.05rem;max-width:720px}
.page-head .provider-list{margin-top:20px}
.inner section{padding:64px 0}
.inner .split h2,.inner .section-heading h2,.inner .learning-intro h2{font-size:clamp(1.45rem,2.3vw,1.9rem);line-height:1.35;letter-spacing:-.02em;margin-bottom:14px}
.inner .split h2 br,.inner .section-heading h2 br,.inner .learning-intro h2 br{display:none}.inner .section-heading p{overflow-wrap:anywhere}
.inner .final-cta h2{font-size:clamp(1.6rem,2.6vw,2.2rem)}
/* 語氣模型頁：頁首插圖、判讀面板、提醒示意 */
.page-head-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.page-head-art{width:100%;height:auto;border-radius:24px;display:block}
.readout{display:grid;grid-template-columns:1fr auto 1.25fr;gap:26px;align-items:center;max-width:980px;margin:0 auto}
.ro-input,.ro-panel{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:26px;box-shadow:var(--shadow)}
.ro-arrow{font-size:1.6rem;color:var(--green);font-weight:800}
.ro-panel dl{margin:12px 0 0}
.ro-row{display:grid;grid-template-columns:7.5em 1fr;gap:12px;align-items:baseline;padding:10px 0;border-top:1px solid var(--line)}
.ro-row:first-child{border-top:0}
.ro-row dt{color:var(--muted);font-size:.9rem;font-weight:700}
.ro-row dd{margin:0;display:flex;flex-wrap:wrap;gap:6px 10px;align-items:baseline}
.ro-row small{color:var(--muted);font-size:.8rem}
.ro-chip{display:inline-block;padding:3px 11px;border-radius:999px;background:var(--mint);color:var(--green);font-weight:750;font-size:.9rem}
.ro-chip.warn{background:var(--amber);color:#916612}
.tone-meter{display:inline-flex;gap:4px}
.tone-step{padding:3px 9px;border-radius:8px;background:var(--soft);color:var(--muted);font-size:.82rem}
.tone-step.on{background:#f3c766;color:#5b3d00;font-weight:800}
.mock-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:980px;margin:0 auto}
.mock{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:26px;display:flex;flex-direction:column;gap:16px}
.mock-tag{align-self:flex-start;font-size:.78rem;font-weight:800;letter-spacing:.06em;color:var(--green);background:var(--mint);padding:4px 10px;border-radius:999px}
.mock figcaption{color:var(--muted);font-size:.92rem}
.mk-card{background:var(--amber);border:2px solid #e9b04c;border-radius:16px;padding:16px 18px}
.mk-card strong{color:#916612;font-size:.88rem}
.mk-card p{margin:6px 0 12px;font-weight:650}
.mk-btns{display:flex;gap:8px;flex-wrap:wrap}
.mk-btn{font-size:.8rem;font-weight:700;padding:4px 10px;border-radius:999px;background:#ffffffb0;border:1px solid #e9b04c80}
.mk-window{position:relative;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--bg);min-height:150px}
.mk-bar{font-size:.78rem;color:var(--muted);padding:8px 12px;border-bottom:1px solid var(--line);font-weight:700}
.mk-draft{padding:14px 14px 50px;font-weight:600}
.mk-hint{position:absolute;right:10px;bottom:10px;font-size:.8rem;color:var(--muted);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:5px 11px}
.mk-hint b{color:var(--green)}
@media(prefers-color-scheme:dark){.ro-chip.warn,.mk-card{color:#f7e5be}.mk-card strong{color:#ffd388}.tone-step.on{background:#c99a35;color:#1d1400}.mk-btn{background:#00000030}}
@media(max-width:900px){.page-head-grid{grid-template-columns:1fr}.page-head-art{max-width:520px}.readout{grid-template-columns:1fr}.ro-arrow{transform:rotate(90deg);justify-self:center}.mock-grid{grid-template-columns:1fr}}
@media(max-width:680px){.ro-row{grid-template-columns:6em 1fr}}
@media(prefers-color-scheme:light){.page-head-art{mix-blend-mode:multiply}}
/* 首頁大標一行：「越用，越懂你。」不拆在逗號後；手機太窄時才換行 */
.mac-hero h1{white-space:nowrap}
@media(max-width:520px){.mac-hero h1{white-space:normal}}
/* 語言選單：補上下拉箭頭，原本右側只剩空白 */
.lang{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%235c6b62' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:30px}
/* 首頁改版：標題縮小、個人化三步驟附畫面、說話示意、隱私三欄 */
.learning-intro h2,.context-heading h2,.section-heading h2,.split h2,.speak h2{font-size:clamp(2rem,3.6vw,3.1rem);line-height:1.25;letter-spacing:-.04em}
.flow{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.flow-step{display:flex;flex-direction:column;gap:18px}
.flow-num{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--green);color:#fff;font-weight:800;font-size:.9rem;margin-bottom:12px}
.flow-text h3{font-size:1.22rem;margin:0 0 6px;letter-spacing:-.02em}
.flow-text p{margin:0;color:var(--muted)}
.shot{margin-top:auto;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:0 14px 34px rgba(22,54,35,.07);overflow:hidden;min-height:150px;display:flex;flex-direction:column}
.shot-bar{font-size:.76rem;font-weight:700;color:var(--muted);padding:9px 14px;border-bottom:1px solid var(--line)}
.shot-body{padding:16px;display:flex;flex-direction:column;gap:10px;flex:1;justify-content:center}
.shot-bubble{align-self:flex-end;background:var(--mint);color:var(--ink);padding:8px 12px;border-radius:14px 14px 4px 14px;font-weight:600;font-size:.92rem}
.shot-pill{align-self:center;display:flex;gap:4px;align-items:center;background:#1d2a22;border-radius:999px;padding:8px 16px}
.shot-pill i{display:block;width:4px;border-radius:2px;background:#8fd8a5;height:10px}.shot-pill i:nth-child(2){height:18px}.shot-pill i:nth-child(3){height:13px}.shot-pill i:nth-child(4){height:20px}
.shot-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:10px;align-items:center;font-size:.88rem;padding:8px 10px;border:1px solid var(--line);border-radius:12px}.shot-row span{overflow-wrap:anywhere}
.shot-row small{color:var(--green);font-weight:800;font-size:.74rem}
.shot-row b{font-size:.76rem;color:#fff;background:var(--green);padding:3px 9px;border-radius:999px}
.shot-judge{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:12px;align-items:center;font-size:.88rem}.shot-judge>span{overflow-wrap:anywhere}
.shot-judge small{display:block;color:var(--muted);font-size:.7rem;margin-bottom:3px}
.shot-judge em{font-style:normal;font-size:.76rem;font-weight:800;padding:3px 9px;border-radius:999px}
.shot-judge em.old{background:var(--amber);color:#916612}.shot-judge em.new{background:var(--green);color:#fff}
.shot-btns{display:flex;gap:8px}.shot-btns b,.shot-btns span{font-size:.78rem;padding:4px 12px;border-radius:999px}
.shot-btns b{background:var(--green);color:#fff}.shot-btns span{border:1px solid var(--line);color:var(--muted)}
.speak{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.speak .lead{margin:0 0 26px}
.speak-list{list-style:none;padding:0;margin:0;display:grid;gap:18px}
.speak-list li{display:grid;gap:3px;padding-left:16px;border-left:3px solid var(--mint)}
.speak-list strong{font-size:1.05rem}.speak-list span{color:var(--muted)}
.speak-art{background:var(--surface);border:1px solid var(--line);border-radius:28px;padding:40px 30px;display:flex;flex-direction:column;align-items:center;gap:26px;box-shadow:var(--shadow)}
.keys{display:flex;align-items:center;gap:10px}
.keys kbd{font:inherit;font-weight:800;font-size:1.25rem;min-width:84px;text-align:center;padding:16px 14px;border-radius:14px;background:var(--bg);border:1px solid var(--line);box-shadow:0 4px 0 var(--line)}
.kplus{color:var(--muted);font-weight:800}
.overlay-pill{display:flex;align-items:center;gap:12px;background:#1d2a22;color:#e9f5ec;border-radius:999px;padding:10px 18px}
.overlay-pill .dot{width:9px;height:9px;border-radius:50%;background:#e05d4f}
.overlay-pill .wave{display:flex;gap:3px;align-items:center}.overlay-pill .wave i{width:3px;border-radius:2px;background:#8fd8a5;height:9px}
.overlay-pill .wave i:nth-child(2n){height:17px}.overlay-pill .wave i:nth-child(3n){height:12px}
.overlay-pill .tag{font-size:.78rem;font-weight:700;color:#bcd8c2}
.pasted{align-self:stretch;border:1px solid var(--line);border-radius:14px;padding:14px 16px;font-weight:600;background:var(--bg)}
.caret{display:inline-block;width:2px;height:1.1em;background:var(--green);vertical-align:-3px;margin-left:2px}
.pledges{display:grid;grid-template-columns:repeat(3,1fr);gap:0;max-width:1000px;margin:0 auto}
.pledges>div{padding:6px 34px;border-left:1px solid #ffffff27}.pledges>div:first-child{border-left:0}
.pledges h3{font-size:1.15rem;margin:0 0 8px}.pledges p{margin:0;color:#c3d9c8}
@media(prefers-color-scheme:dark){.shot-judge em.old{color:#f7e5be}.shot-row b,.shot-btns b,.shot-judge em.new{color:#102316}}
@media(max-width:900px){.flow{grid-template-columns:1fr}.speak{grid-template-columns:1fr;gap:34px}.pledges{grid-template-columns:1fr;gap:22px}.pledges>div{border-left:0;padding:0}}
/* 教學頁 */
.guide{display:grid;grid-template-columns:200px 1fr;gap:56px;padding:48px 0 80px;align-items:start}
.guide-toc{position:sticky;top:96px;display:flex;flex-direction:column;gap:4px;font-size:.92rem}
.guide-toc strong{font-size:.78rem;color:var(--muted);letter-spacing:.08em;margin-bottom:6px}
.guide-toc a{text-decoration:none;color:var(--muted);padding:5px 10px;border-radius:8px}
.guide-toc a:hover{background:var(--soft);color:var(--green)}
.guide-sec{padding:0 0 40px;margin-bottom:40px;border-bottom:1px solid var(--line);scroll-margin-top:90px}
.guide-sec:last-child{border-bottom:0}
.guide-sec h2{font-size:1.6rem;letter-spacing:-.02em;margin:0 0 18px}
.guide-sec dl{margin:0;display:grid;gap:18px}
.guide-item{display:grid;grid-template-columns:11em 1fr;gap:18px}
.guide-item dt{font-weight:750}
.guide-item dd{margin:0;color:var(--muted)}
.kbd-row{display:inline-flex;align-items:center;gap:6px;margin-right:8px;vertical-align:middle}
.kbd-row kbd{font:inherit;font-weight:800;font-size:.85rem;color:var(--ink);padding:3px 9px;border-radius:7px;background:var(--surface);border:1px solid var(--line);box-shadow:0 2px 0 var(--line)}
.kbd-row .kplus{font-size:.8rem}
.inline-link{color:var(--green);font-weight:700;text-decoration:none;white-space:nowrap}
.inline-link:hover{text-decoration:underline}
@media(max-width:900px){.guide{grid-template-columns:1fr;gap:28px}.guide-toc{position:static;flex-direction:row;flex-wrap:wrap}.guide-toc strong{width:100%}.guide-item{grid-template-columns:1fr;gap:4px}}
/* 教學頁示意介面 */
.gfig{margin:0 0 24px;padding:28px;border-radius:22px;background:linear-gradient(145deg,var(--soft),var(--bg));border:1px solid var(--line);display:flex;flex-direction:column;align-items:center;gap:16px}
.gfig .keys kbd{font-size:1.05rem;min-width:72px;padding:12px 12px}
.g-pill{display:flex;align-items:center;gap:12px;background:#1d2a22;color:#e9f5ec;border-radius:999px;padding:10px 18px;border:2px solid transparent}
.g-pill .dot{width:9px;height:9px;border-radius:50%;background:#e05d4f}
.g-pill .wave{display:flex;gap:3px;align-items:center}.g-pill .wave i{width:3px;border-radius:2px;background:#8fd8a5;height:9px}
.g-pill .wave i:nth-child(2n){height:17px}.g-pill .wave i:nth-child(3n){height:12px}
.g-pill .tag{font-size:.78rem;font-weight:700;color:#bcd8c2}
.g-pill.ai{background:linear-gradient(#1d2a22,#1d2a22) padding-box,linear-gradient(90deg,#4fc37a,#5aa8f0,#a77bf3,#f0a35a) border-box;box-shadow:0 0 22px #a77bf355}
.g-pill.ai .wave i{background:linear-gradient(#7fd0ff,#c79bff)}
.g-text,.g-said{align-self:stretch;max-width:460px;margin:0 auto;width:100%;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px 16px;font-weight:600}
.g-said{text-align:center;color:var(--muted);font-weight:650;background:transparent;border-style:dashed}
.g-ba{width:100%;max-width:460px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:12px 16px}
.g-ba small{color:var(--muted);font-size:.75rem;font-weight:700}.g-ba p{margin:4px 0 0;font-weight:600}
.g-ba s{color:#c0574b;text-decoration-thickness:2px}.g-ba.ok{border-color:var(--green)}
.g-arrow{color:var(--green);font-weight:800}
.g-rw-btn{align-self:center;font-size:.85rem;font-weight:750;color:#e9f5ec;background:#1d2a22;border-radius:999px;padding:6px 14px;margin-top:-6px}
.g-panel{width:100%;max-width:460px;background:#fbf8f1;color:#1d2a22;border:1px solid #e6dfcf;border-radius:18px;padding:16px;box-shadow:0 16px 36px rgba(22,54,35,.12);display:grid;gap:11px}
.g-panel-h{display:flex;justify-content:space-between;align-items:center;font-size:.9rem}.g-panel-h span{font-size:.75rem;background:#ece6d8;padding:3px 9px;border-radius:999px}
.g-chips{display:flex;flex-wrap:wrap;gap:6px}.g-chips span{font-size:.78rem;font-weight:700;padding:5px 11px;border-radius:999px;border:1px solid #d9d2c2;background:#fff}
.g-chips .on{background:#1d2a22;color:#fff;border-color:#1d2a22}.g-chips .add{border-style:dashed;background:transparent}
.g-slider{display:grid;grid-template-columns:5em 1fr;align-items:center;gap:10px}.g-slider small{font-size:.75rem;color:#5c6b62}
.g-slider i{position:relative;height:5px;border-radius:3px;background:linear-gradient(90deg,#5cae6a var(--v),#e2ddd0 var(--v))}
.g-slider i:after{content:"";position:absolute;left:var(--v);top:50%;width:14px;height:14px;border-radius:50%;background:#fff;border:1px solid #cfc8b8;transform:translate(-50%,-50%)}
.g-result{background:#fff;border:1px solid #e6dfcf;border-radius:12px;padding:10px 12px;font-size:.88rem;line-height:1.6}
.g-actions{display:flex;justify-content:flex-end;gap:8px}.g-actions.left{justify-content:flex-start}
.g-actions b,.g-actions span{font-size:.8rem;padding:5px 13px;border-radius:999px}
.g-actions b{background:var(--green);color:#fff}.g-actions span{border:1px solid var(--line);color:var(--muted);background:var(--surface)}
.g-panel .g-actions b{background:#1d2a22}.g-panel .g-actions span{background:#fff;color:#5c6b62;border-color:#d9d2c2}
.g-chat{width:100%;max-width:460px;display:flex;flex-direction:column;gap:8px}
.g-chat span{max-width:85%;padding:8px 12px;border-radius:14px;font-size:.9rem;font-weight:600}
.g-chat .them{align-self:flex-start;background:var(--surface);border:1px solid var(--line)}
.g-chat .me{align-self:flex-end;background:#9fe3a5;color:#123418}
.gfig .mk-card{width:100%;max-width:460px}
.g-confirm,.g-train{width:100%;max-width:480px;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px;display:grid;gap:12px}
.g-confirm small,.g-local{color:var(--muted);font-size:.75rem;font-weight:700}
.g-two{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.g-two div{border:1px solid var(--line);border-radius:12px;padding:9px 11px;font-size:.88rem;font-weight:600}
.g-two em{display:block;font-style:normal;font-size:.72rem;color:var(--muted);font-weight:700;margin-bottom:2px}
.g-two div:last-child{border-color:var(--green)}.g-two div:last-child em{color:var(--green)}
.g-bar{height:7px;border-radius:4px;background:var(--soft);overflow:hidden}.g-bar i{display:block;height:100%;width:100%;background:var(--green)}
.g-steps{display:flex;flex-wrap:wrap;gap:6px 14px;font-size:.8rem;color:var(--green);font-weight:700}
.g-local{color:var(--green)}
.g-verdict{display:grid;grid-template-columns:1fr auto auto;gap:12px;align-items:center;font-size:.88rem;border-top:1px solid var(--line);padding-top:12px}
.g-verdict small{display:block;color:var(--muted);font-size:.7rem;margin-bottom:3px}
.g-verdict em{font-style:normal;font-size:.76rem;font-weight:800;padding:3px 9px;border-radius:999px}
.g-verdict em.old{background:var(--amber);color:#916612}.g-verdict em.new{background:var(--green);color:#fff}
.g-form{width:100%;max-width:440px;background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.g-form div{display:flex;justify-content:space-between;gap:12px;padding:12px 16px;border-top:1px solid var(--line);font-size:.9rem}.g-form div:first-child{border-top:0}
.g-form span{color:var(--muted)}.g-form b{font-weight:700}
.g-drag{position:relative;padding:22px 34px;border:2px dashed var(--line);border-radius:999px;display:flex;flex-direction:column;align-items:center;gap:10px}
.g-drag-hint{font-size:.8rem;color:var(--muted);font-weight:700}
@media(prefers-color-scheme:dark){.g-verdict em.old{color:#f7e5be}.g-verdict em.new,.g-actions b{color:#102316}.g-chat .me{background:#2f6b3c;color:#e9f5ec}}
@media(max-width:680px){.gfig{padding:18px}.g-two{grid-template-columns:1fr}.g-verdict{grid-template-columns:1fr 1fr}.g-verdict span{grid-column:1/-1}}

/* 0.4.12: English tone tags are longer; keep the model readout inside phone width */
@media (max-width: 680px) {
  .readout { grid-template-columns: minmax(0, 1fr); }
  .readout > * { min-width: 0; }
  .tone-meter { flex-wrap: wrap; }
}

/* learning page links made the English guide grid wider than the phone */
@media (max-width: 680px) {
  .wrap.guide { grid-template-columns: minmax(0, 1fr); }
  .guide-body, .guide-item, .guide-item > * { min-width: 0; }
  .guide-item dd { overflow-wrap: anywhere; }
}
@media (max-width: 680px) { .inline-link { white-space: normal; } }