:root{color-scheme:light;--paper:#f7f6f2;--ink:#203b35;--muted:#586962;--line:#d5dbd2;--accent:#a64124;--green:#204d40;--mint:#e8ede2;--white:#fffefa;--radius:22px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB",sans-serif;font-synthesis:none}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:5px;text-decoration-thickness:1px}
button{font:inherit}
img{max-width:100%;height:auto;display:block}
button,a,summary{-webkit-tap-highlight-color:transparent}
:focus-visible{outline:3px solid #a64124;outline-offset:5px;border-radius:4px}
::selection{background:#dce7b9;color:#203b35}
p,h1,h2,h3,figure{margin:0}
h1,h2,h3{font-weight:600;line-height:1.15;letter-spacing:-.04em;text-wrap:balance}
p{color:var(--muted);text-wrap:pretty}
.wrap{width:min(1160px,calc(100% - 96px));margin-inline:auto}
.skip-link{position:fixed;top:-100px;left:20px;z-index:20;padding:12px 20px;background:var(--ink);color:#fff}
.skip-link:focus{top:12px}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:110px;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.brand>span{font-size:30px;font-weight:720;letter-spacing:-1.6px;line-height:1}
.brand-dot{color:var(--accent)}
.brand img{border-radius:11px}
.site-header nav{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:550}
.site-header nav>a:not(.button){text-decoration:none;padding-block:12px}
.site-header nav>a:not(.button):hover{text-decoration:underline}
.language-link{border-left:1px solid var(--line);padding-left:24px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;padding:15px 25px;border:1px solid var(--green);border-radius:100px;background:var(--green);color:white;text-decoration:none;font-size:16px;line-height:1.4;font-weight:560;transition:background .15s,transform .15s;min-height:52px}
.button:hover{background:#153d31;transform:translateY(-1px)}
.button-small{padding:10px 18px;font-size:13px;gap:12px;min-height:44px}
.eyebrow{font-size:11px;letter-spacing:.16em;font-weight:650;color:var(--accent);line-height:1.5;text-transform:uppercase}
.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:64px;align-items:center;padding-top:68px;padding-bottom:80px}
.hero h1{font-size:clamp(48px,5.4vw,70px);max-width:660px;margin:26px 0 25px}
.hero h1 em{font-family:Georgia,"Times New Roman",serif;font-weight:400;color:var(--accent);font-style:italic}
html[lang=zh-Hans] .hero h1{font-size:clamp(40px,4.6vw,60px);line-height:1.3;letter-spacing:-.045em}
html[lang=zh-Hans] .hero h1 em{font-family:inherit;font-weight:600;font-style:normal;display:block}
.lead{font-size:19px;line-height:1.7;max-width:540px}
.hero-actions{display:flex;align-items:flex-start;flex-direction:column;gap:19px;margin-top:32px}
.text-link{display:inline-flex;align-items:center;gap:12px;font-size:15px;font-weight:570;text-decoration:none;border-bottom:1px solid #a4b0a7;padding-bottom:4px;color:var(--ink);width:fit-content}
.text-link:hover{border-color:var(--ink)}
.play-icon{font-size:10px;border:1px solid #a5b1a8;border-radius:50%;height:24px;width:24px;display:inline-flex;align-items:center;justify-content:center;padding-left:1px}
.compatibility{font-size:12px;margin-top:17px}
.little-wave{margin-top:42px;display:flex;align-items:center;gap:3px;height:24px;color:var(--muted)}
.little-wave i{display:block;width:2px;height:9px;background:#a2b3a5;border-radius:4px}
.little-wave i:nth-child(3n){height:22px}.little-wave i:nth-child(3n+1){height:14px}
.little-wave span{font-size:10px;letter-spacing:.08em;margin-left:12px}
.hero-visual{position:relative;background:var(--mint);border-radius:160px 160px 28px 28px;padding:25px 20px 18px;isolation:isolate}
.screen-switch{text-align:center}
.screen-eyebrow{font-size:11px;color:var(--ink);letter-spacing:.045em;font-weight:580;margin-bottom:12px}
.screen-buttons{display:inline-flex;border:1px solid #a8b7a9;border-radius:30px;padding:4px;gap:2px;margin-bottom:22px;background:#ffffff4d}
.screen-buttons button{color:var(--ink);background:transparent;border:0;border-radius:22px;cursor:pointer;padding:9px 16px;font-size:12px;line-height:1.4;min-height:38px}
.screen-buttons button[aria-pressed=true]{background:var(--ink);color:#fff}
.phone-screen{width:min(246px,100%);height:auto;margin:0 auto;border-radius:30px;box-shadow:0 12px 32px #1e372619;border:4px solid #28352f;box-sizing:content-box}
.phone-figure figcaption{font-size:10px;line-height:1.5;margin:17px auto 0;max-width:280px;color:#4f6257}
.noscript-note{font-size:12px;margin:8px 0}
.practice-section{padding:50px 0 80px;border-top:1px solid var(--line)}
.section-heading{display:grid;grid-template-columns:1fr .8fr;gap:100px;align-items:end;margin-bottom:44px}
h2{font-size:clamp(30px,3.2vw,42px)}
.section-heading h2,.guides-section h2,.faq-section h2{margin-top:16px}
.section-heading>p{font-size:16px;max-width:340px;padding-bottom:4px}
.practice-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:38px;list-style:none;padding:0;margin:0}
.practice-steps li{border-top:1px solid #bbc6b8;padding-top:22px}
.step-number{display:block;color:var(--accent);font-family:Georgia,serif;font-style:italic;font-size:23px;margin-bottom:13px}
.practice-steps h3{font-size:22px;letter-spacing:-.025em;margin-bottom:14px}
.practice-steps p{font-size:15px;line-height:1.8}
.bring-section{background:#edf0e8;padding:64px 0}
.bring-grid{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:center;max-width:980px}
.import-figure{display:flex;flex-direction:column;align-items:center}
.import-figure img{width:218px;border-radius:25px;border:1px solid #c6d0c0;box-shadow:0 12px 35px #233b2910}
figcaption{font-size:11px;color:var(--muted);margin-top:16px;text-align:center}
.bring-copy h2{margin-top:20px;line-height:1.25}
.bring-copy>p:not(.eyebrow){margin-top:24px;font-size:17px}
.bring-copy>.text-link{margin-top:28px}
.bring-copy .soft-note{font-size:13px!important;border-top:1px solid #c3ccbd;padding-top:20px;margin-top:30px!important;max-width:400px}
.guides-section{padding:85px 0 75px}
.guide-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:32px}
.guide-card{padding:32px;border:1px solid #ccd4c7;border-radius:var(--radius);text-decoration:none;background:#fffefa65;display:flex;flex-direction:column;align-items:flex-start;transition:background .15s,border-color .15s}
.guide-card:hover{background:var(--white);border-color:#9bb09b}
.guide-card h3{font-size:29px;line-height:1.25;max-width:350px;margin:24px 0 15px}
.guide-card>p{font-size:15px;line-height:1.75;max-width:370px;margin-bottom:28px}
.card-link{display:flex;justify-content:space-between;width:100%;border-top:1px solid var(--line);padding-top:18px;margin-top:auto;font-size:14px;font-weight:550}
.card-link>span{font-size:19px}
.faq-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;padding-top:24px;padding-bottom:85px}
.faq-list details{border-top:1px solid var(--line)}
.faq-list details:last-child{border-bottom:1px solid var(--line)}
.faq-list summary{display:flex;justify-content:space-between;gap:24px;align-items:center;padding:22px 0;cursor:pointer;font-size:16px;font-weight:550;list-style:none;line-height:1.5}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list .expand{font-size:23px;line-height:1;font-weight:400;color:var(--accent)}
.faq-list details[open] .expand{transform:rotate(45deg)}
.faq-list details p{font-size:14px;line-height:1.85;padding-bottom:23px;max-width:520px}
.closing-section{display:flex;align-items:center;justify-content:space-between;gap:44px;padding:42px 44px;background:#e4eadb;border-radius:var(--radius);margin-bottom:70px}
.closing-section h2{font-size:30px;max-width:610px}
.closing-section p{font-size:15px;margin-top:14px}
.closing-section .button{flex-shrink:0}
.site-footer{border-top:1px solid var(--line);padding:36px 0 32px}
.footer-top{display:flex;justify-content:space-between;align-items:center;gap:36px}
.footer-wordmark{font-size:26px;letter-spacing:-1.4px;font-weight:650;text-decoration:none}
.footer-top p{font-size:12px;margin-top:7px}
.footer-top nav{display:flex;gap:26px;font-size:12px;flex-wrap:wrap}
.credits{font-size:11px;line-height:1.8;margin-top:22px;max-width:850px;color:var(--muted)}
.credits summary{cursor:pointer;display:list-item;width:fit-content;min-height:24px}
.credits p{padding:10px 0}
.guide-breadcrumb{display:flex;gap:13px;font-size:12px;padding-top:34px}
.guide-breadcrumb a{text-decoration:none}.guide-breadcrumb a:hover{text-decoration:underline}
.guide-breadcrumb span{color:#8e9a8f}
.guide-title{padding:52px 0 46px;border-bottom:1px solid var(--line)}
.guide-title h1{font-size:clamp(38px,5.2vw,62px);max-width:850px;margin:22px 0}
.guide-title .lead{max-width:730px}
.guide-requirement{font-size:12px;margin-top:21px}
.article-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:74px;padding-top:46px;padding-bottom:75px}
.article-aside{align-self:start;position:sticky;top:30px;font-size:14px}
.article-aside ol{padding-left:20px;margin:23px 0 32px}
.article-aside li{margin:14px 0;padding-left:3px}
.article-aside li::marker{font-size:11px;color:var(--accent)}
.article-aside li a{text-decoration:none;color:var(--muted)}
.article-aside li a:hover{color:var(--ink);text-decoration:underline}
.article-aside>.text-link{font-size:12px}
.article-body{max-width:720px}
.article-step{margin-bottom:48px}
.article-step h2,.troubleshooting h2,.article-demo h2{font-size:29px;line-height:1.35;letter-spacing:-.025em;margin-bottom:18px}
.article-step p,.troubleshooting p{font-size:17px;line-height:1.85}
.article-shot{margin-top:28px;background:#ecefe5;padding:30px;border-radius:var(--radius)}
.article-shot a{display:block;width:228px;max-width:100%;margin-inline:auto;border-radius:22px}
.article-shot img{width:228px;border:1px solid #c8d0c0;border-radius:22px}
.troubleshooting{padding:28px 30px;background:#edece5;border-left:3px solid #b98e62;margin:50px 0}
.troubleshooting h3{font-size:18px;margin:22px 0 8px;letter-spacing:-.01em}
.troubleshooting p{font-size:15px}
.article-demo{padding:32px;background:var(--mint);border-radius:var(--radius);margin:45px 0}
.article-demo h2{text-align:center;margin-bottom:30px}
.article-demo .soft-note{font-size:12px;margin-top:24px;line-height:1.8}
.article-demo .phone-screen{width:250px}
.article-cta{padding:30px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:40px 0}
.article-cta h2{font-size:26px;margin-bottom:22px}
.next-guide{display:block;text-decoration:none;margin-top:35px}
.next-guide>span:last-child{display:flex;justify-content:space-between;gap:20px;margin-top:12px;font-size:22px;line-height:1.5;font-weight:550}
.next-guide:hover>span:last-child{text-decoration:underline}
@media(min-width:1500px){.hero{gap:100px}.hero-visual{margin-left:15px}}
@media(max-width:1020px){.wrap{width:calc(100% - 64px)}.hero{gap:35px;grid-template-columns:1.1fr 1fr}.hero h1{font-size:55px}.phone-screen{width:215px}.site-header nav{gap:22px}.bring-grid{gap:55px}.faq-section{gap:40px}.article-layout{gap:40px;grid-template-columns:190px minmax(0,1fr)}.section-heading{gap:44px}.closing-section h2{font-size:26px}}
@media(max-width:760px){.wrap{width:calc(100% - 40px)}.site-header{min-height:86px;gap:12px}.brand{gap:7px}.brand>span{font-size:26px}.brand img{width:30px;height:30px;border-radius:8px}.site-header nav{gap:16px}.nav-detail,.site-header .button-small{display:none}.language-link{padding-left:16px}.hero{grid-template-columns:1fr;gap:42px;padding-top:40px;padding-bottom:48px}.hero-copy{max-width:580px}.hero h1{font-size:56px;max-width:540px;margin:20px 0}.lead{font-size:17px}.hero-actions{gap:18px;margin-top:24px}.compatibility{font-size:11px}.little-wave{margin-top:28px}.hero-visual{width:min(410px,100%);margin-inline:auto;border-radius:120px 120px 24px 24px;padding:24px 18px 20px}.phone-screen{width:230px}.screen-buttons button{min-height:40px}.practice-section{padding:35px 0 48px}.section-heading{display:block;margin-bottom:30px}.section-heading>p{margin-top:18px;max-width:100%}.practice-steps{grid-template-columns:1fr;gap:24px}.practice-steps li{display:grid;grid-template-columns:40px 1fr;column-gap:13px;padding-top:20px}.practice-steps .step-number{grid-row:1/3;font-size:22px;line-height:1.2}.practice-steps h3{font-size:21px;margin-bottom:8px}.practice-steps p{font-size:15px}.bring-section{padding:42px 0}.bring-grid{grid-template-columns:1fr;gap:35px}.bring-copy{grid-row:1;max-width:500px}.bring-copy h2{font-size:34px;margin-top:16px}.bring-copy>p:not(.eyebrow){font-size:16px;margin-top:18px}.bring-copy .soft-note{max-width:100%}.import-figure img{width:210px}.guides-section{padding:48px 0 42px}.guide-grid{grid-template-columns:1fr;gap:16px;margin-top:26px}.guide-card{padding:25px}.guide-card h3{font-size:26px;margin-top:18px;max-width:100%}.guide-card>p{max-width:100%;margin-bottom:24px}.faq-section{grid-template-columns:1fr;gap:25px;padding:0 0 42px}.faq-list summary{font-size:15px;padding:20px 0}.closing-section{flex-direction:column;align-items:flex-start;gap:24px;padding:28px;margin-bottom:46px}.closing-section h2{font-size:28px}.footer-top{display:block}.footer-top nav{gap:25px;margin-top:24px}.site-footer{padding-top:27px}.guide-title{padding:35px 0}.guide-title h1{font-size:39px;margin:18px 0}.guide-title .lead{font-size:17px}.article-layout{grid-template-columns:1fr;gap:30px;padding-top:30px;padding-bottom:48px}.article-aside{position:static;border-bottom:1px solid var(--line);padding-bottom:26px}.article-aside ol{margin:15px 0 22px}.article-aside li{margin:9px 0}.article-step{margin-bottom:34px}.article-step h2,.troubleshooting h2,.article-demo h2{font-size:26px}.article-step p{font-size:16px}.article-step .step-number{margin-bottom:9px}.article-shot{padding:22px}.troubleshooting{padding:24px;margin:32px 0}.article-demo{padding:24px 18px;margin:32px 0}.article-demo .phone-screen{width:220px}.article-demo h2{font-size:24px}.next-guide>span:last-child{font-size:20px}html[lang=zh-Hans] .hero h1{font-size:42px}}
@media(max-width:380px){.wrap{width:calc(100% - 32px)}.hero h1{font-size:47px}html[lang=zh-Hans] .hero h1{font-size:37px}.hero-visual{padding-inline:13px}.phone-screen{width:215px}.screen-buttons button{padding-inline:12px;font-size:11px}.button{font-size:14px;padding-inline:20px}.guide-title h1{font-size:34px}.closing-section{padding:24px}.article-demo .phone-screen{width:195px}.article-demo{padding-inline:12px}.screen-eyebrow{font-size:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}
@media print{body{background:#fff;font-size:12pt}.wrap{width:100%}.site-header,.article-aside,.hero-actions,.screen-buttons,.site-footer,.closing-section{display:none}.article-layout,.hero,.bring-grid{display:block}.article-body{max-width:none}.phone-screen,.import-figure img{max-width:150px}.article-step{break-inside:avoid}a{text-decoration:underline}.guide-title h1{font-size:30pt}}