:root{color-scheme:light;--ink:#173f42;--muted:#52696b;--teal:#176e70;--line:#d4e4df;--paper:#fcfcf8;--wash:#e7f3ee;--warm:#f3e8d5;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:17px;line-height:1.75;-webkit-font-smoothing:antialiased}a{color:var(--teal);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid #b24c21;outline-offset:5px;border-radius:3px}img{max-width:100%;height:auto}figure{margin:0}p{margin:0 0 1.2em}h1,h2,h3{line-height:1.16;letter-spacing:-.035em;text-wrap:balance}h1{font-size:clamp(2.7rem,5.5vw,4.9rem);font-weight:750;margin:0 0 28px}h2{font-size:clamp(2rem,3.6vw,3.25rem);margin:0 0 24px}h3{font-size:1.3rem;margin:0 0 14px}h1:lang(zh-Hans),h2:lang(zh-Hans){line-height:1.35;letter-spacing:-.02em}button,input,summary{font:inherit}.wrap{width:min(1160px,100% - 64px);margin-inline:auto}.skip-link{position:absolute;z-index:5;top:-100px;left:16px;padding:12px;background:var(--white)}.skip-link:focus{top:12px}.preview-note{background:var(--warm);text-align:center;color:#5e4c2d;font-size:12px;font-weight:650;letter-spacing:.03em;padding:5px 16px;margin:0}.site-header{border-bottom:1px solid var(--line);background:var(--paper)}.nav{min-height:92px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;gap:12px;align-items:center;flex-shrink:0;text-decoration:none;font-size:20px;font-weight:750;letter-spacing:-.03em;color:var(--ink)}.brand img{border-radius:10px}.nav-links{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:12px 24px}.nav-links a{text-decoration:none;color:var(--ink);font-size:14px;min-height:44px;display:inline-flex;align-items:center}.nav-links a:hover,.nav-links a[aria-current=page]{text-decoration:underline}.nav-links .language-link{border-left:1px solid var(--line);padding-left:22px;color:var(--teal)}.hero{background:var(--wash);border-bottom:1px solid var(--line)}.hero-grid{display:grid;grid-template-columns:1.35fr .8fr;gap:64px;align-items:center;padding-top:70px;padding-bottom:66px}.hero-copy{padding-bottom:16px}.eyebrow{text-transform:uppercase;letter-spacing:.13em;font-size:12px;line-height:1.7;font-weight:750;color:var(--teal);margin-bottom:22px}.lead{font-size:clamp(1.1rem,1.55vw,1.26rem);color:var(--muted);line-height:1.7;max-width:640px}.availability{font-size:13px;margin:25px 0 0;font-weight:650;color:#385b4b}.availability span{color:#52704d;font-size:10px;margin-right:6px}.actions{display:flex;flex-wrap:wrap;gap:18px 24px;align-items:center;margin:22px 0 20px}.button{display:inline-flex;align-items:center;gap:24px;border-radius:8px;min-height:50px;padding:12px 22px;color:var(--white);background:var(--ink);font-weight:650;font-size:15px;text-decoration:none}.button:hover{background:#23565a}.text-link{font-size:15px;font-weight:650}.small{font-size:13px;color:var(--muted)}.hero-figure{max-width:304px;justify-self:center;width:100%;position:relative}.screen{display:block;width:100%;border-radius:20px;border:1px solid #cee1de;box-shadow:0 12px 32px #173f420c}.hero-figure figcaption{text-align:center;font-size:11px;color:var(--muted);margin-top:14px}.section{padding-block:88px}.section-heading{max-width:750px;margin-bottom:42px}.section-heading>p:not(.eyebrow){max-width:660px;color:var(--muted)}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:44px}.feature-grid article{border-top:1px solid #a6beb5;padding-top:22px}.feature-grid p{color:var(--muted);font-size:16px}.step-number{display:block;font-size:12px;letter-spacing:.12em;margin-bottom:28px;color:var(--teal)}.screens-section{background:#f0f4ef;border-block:1px solid var(--line)}.screen-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-bottom:32px}.screen-grid img{max-width:280px;margin:auto}.screen-grid figcaption{margin:25px auto 0;max-width:300px}.screen-grid h3{font-size:20px}.screen-grid p{font-size:15px;color:var(--muted);line-height:1.7}.pricing{display:grid;grid-template-columns:1fr 1fr;gap:85px;align-items:start}.price-detail{border-left:1px solid var(--line);padding-left:48px}.price-detail h3{font-size:25px;line-height:1.4}.price-detail p{font-size:16px;color:var(--muted)}.lower-section{padding-top:0}.callout{background:var(--ink);color:var(--white);padding:56px;border-radius:18px;display:grid;grid-template-columns:1.25fr 1fr;gap:64px;align-items:center}.callout .eyebrow{color:#b8d9c7}.callout p{color:#d1e1db;font-size:16px}.callout .light{background:#f0e6d3;color:var(--ink)}.callout .note-list p{padding:16px 0;border-bottom:1px solid #527575;font-size:14px}.content{max-width:810px;margin:0 auto;padding:72px 32px 96px;overflow-wrap:break-word}.content h1{font-size:clamp(2.4rem,5vw,3.9rem)}.content h2{font-size:1.65rem;line-height:1.35;margin:0 0 20px}.content section{margin-top:44px}.content section .eyebrow{margin-bottom:10px}.content p{color:var(--muted)}.content .meta{font-size:14px;line-height:1.8}.contact-box{background:var(--wash);padding:26px 30px;border-radius:12px;margin:32px 0 50px}.contact-box>a{font-weight:700;font-size:clamp(1rem,3vw,1.4rem);overflow-wrap:anywhere}.contact-box p{font-size:14px;margin:16px 0 0}.faq-list{margin:42px 0}.faq-list details{border-top:1px solid var(--line)}.faq-list details:last-child{border-bottom:1px solid var(--line)}summary{cursor:pointer;list-style:none;padding:22px 44px 22px 0;position:relative;font-weight:650;line-height:1.5}summary::-webkit-details-marker{display:none}summary::after{content:'+';position:absolute;right:4px;top:18px;font-size:25px;font-weight:400;color:var(--teal)}details[open] summary::after{content:'−'}details>div{padding:0 24px 10px 0}details p{font-size:16px}.toc{background:var(--wash);border-left:3px solid #83b49d;padding:24px 30px;margin:36px 0 50px}.toc p{margin-bottom:12px}.toc ol{padding-left:24px;margin:0}.toc li{padding:6px 0;font-size:15px}.guide h1{font-size:clamp(2.1rem,4vw,3.25rem);line-height:1.3}.guide section{margin-top:48px}.table-scroll{overflow-x:auto;margin:28px 0;max-width:100%}table{border-collapse:collapse;width:100%;font-size:14px;text-align:left}caption{text-align:left;font-weight:650;padding-bottom:12px;color:var(--muted)}th,td{border-bottom:1px solid var(--line);padding:14px 12px;vertical-align:top}th{background:var(--wash);font-weight:650}td{color:var(--muted)}.checklist{background:#f3ecdE;padding:28px;border-radius:12px}.checklist ul{padding-left:22px}.checklist li{padding:7px 0}.draft-note{background:#f8ecda;border-left:3px solid #987032;padding:20px 24px;margin-top:24px}.draft-note p{margin:10px 0 0;font-size:15px}.site-footer{border-top:1px solid var(--line)}.footer-inner{display:flex;justify-content:space-between;gap:40px;padding-block:40px}.footer-brand{font-size:18px}.footer-inner p{font-size:13px;margin:12px 0 0;color:var(--muted)}.footer-links{display:flex;gap:14px 25px;align-content:flex-start;flex-wrap:wrap;max-width:340px;font-size:14px}.footer-links a{min-height:44px;display:inline-flex;align-items:center}
@media(max-width:900px){.wrap{width:calc(100% - 40px)}.nav{gap:18px;min-height:84px}.brand{font-size:18px;gap:9px}.nav-links{gap:4px 14px}.nav-links a{font-size:13px}.hero-grid{gap:35px;padding-block:52px;grid-template-columns:1.2fr .8fr}.hero-figure{max-width:270px}.hero h1{font-size:3.1rem}.feature-grid{gap:25px}.screen-grid{gap:25px}.pricing{gap:38px}.price-detail{padding-left:30px}.callout{padding:36px;gap:35px}.callout .note-list p{font-size:13px}}
@media(max-width:640px){.wrap{width:calc(100% - 36px)}.nav{align-items:flex-start;flex-direction:column;gap:4px;padding-block:16px 9px}.brand{min-height:40px}.nav-links{width:100%;justify-content:space-between;gap:0 9px}.nav-links .language-link{padding-left:10px}.hero-grid{grid-template-columns:1fr;gap:34px;padding-top:42px;padding-bottom:38px}.hero-copy{padding:0}.hero h1{font-size:clamp(2.55rem,11vw,3.7rem);margin-bottom:24px}.hero h1:lang(zh-Hans){font-size:clamp(2.7rem,11vw,3.8rem)}.hero .lead{font-size:17px}.hero-figure{max-width:290px}.hero-figure figcaption{font-size:11px}.eyebrow{font-size:11px;margin-bottom:18px}.availability{font-size:12px}.actions{gap:16px 20px}.button{font-size:14px;gap:16px}.section{padding-block:54px}.feature-grid{grid-template-columns:1fr;gap:14px}.feature-grid article{display:grid;grid-template-columns:30px 1fr;gap:0 12px}.step-number{grid-row:1/3;margin-top:2px}.feature-grid h3{font-size:19px;margin-bottom:10px}.feature-grid p{font-size:15px}.screen-grid{grid-template-columns:1fr;gap:36px}.screen-grid figure{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1fr);gap:22px;align-items:center}.screen-grid img{border-radius:12px}.screen-grid figcaption{margin:0}.screen-grid h3{font-size:18px;line-height:1.4}.screen-grid p{font-size:14px}.section-heading{margin-bottom:30px}.pricing{grid-template-columns:1fr;gap:22px}.price-detail{border-left:0;border-top:1px solid var(--line);padding:25px 0 0}.price-detail h3{font-size:23px}.lower-section{padding-top:0}.callout{grid-template-columns:1fr;gap:26px;padding:30px 24px}.callout h2{font-size:2rem}.callout .note-list p{margin:0;padding:12px 0}.content{padding:44px 22px 64px}.content h1{font-size:2.6rem}.content h2{font-size:1.5rem}.content .lead{font-size:17px}.guide h1{font-size:2rem}.content p{font-size:16px}.content .meta{font-size:13px}.toc{padding:22px;margin-bottom:40px}.toc li{font-size:14px}.contact-box{padding:22px}.contact-box p{font-size:13px}.checklist{padding:24px 20px}.table-scroll table{font-size:13px;min-width:430px}.footer-inner{flex-direction:column;gap:22px;padding-block:32px}.footer-links{max-width:none;font-size:13px}.preview-note{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.site-header,.site-footer,.preview-note,.toc,.actions{display:none}body{background:white;color:black;font-size:11pt}.content,.wrap{max-width:100%;width:100%;padding:0}.guide section{break-inside:avoid}.table-scroll{overflow:visible}table{min-width:0!important}.checklist{border:1px solid #aaa;background:white}a{color:inherit}}

.table-hint{margin-top:28px!important;margin-bottom:-12px!important}@media(min-width:641px){.table-hint{display:none}}

/* Five-language navigation: native details, no script or external assets. */
.language-menu{position:relative;flex-shrink:0;font-size:14px}.language-menu>summary{padding:12px 22px 12px 10px;color:var(--teal);font-weight:650;min-height:44px}.language-menu>summary::after{content:'⌄';font-size:16px;top:10px;right:2px}.language-menu[open]>summary::after{content:'⌃'}.language-menu>div{position:absolute;right:0;z-index:10;min-width:180px;padding:8px 14px;background:var(--paper);border:1px solid var(--line);border-radius:8px;box-shadow:0 8px 28px #173f4218}.language-menu>div a{display:flex;min-height:44px;padding:7px 8px}.language-menu a[aria-current=true]{font-weight:750;text-decoration:underline}.hero-copy,.nav-links{min-width:0}h1,h2,h3{overflow-wrap:break-word}.language-menu>summary:focus-visible{outline:3px solid #b24c21;outline-offset:3px}
@media(max-width:640px){.nav-links{justify-content:flex-start;gap:0 14px}.language-menu{margin-left:auto}.language-menu>div{max-width:calc(100vw - 40px)}.nav-links a{font-size:13px}.hero h1:lang(de),.hero h1:lang(fr),.hero h1:lang(es){font-size:clamp(2.3rem,10vw,3.5rem)}}