:root{--ink:#203b5b;--muted:#61758c;--blue:#3575d9;--paper:#f5f8fc;--line:#e2eaf4}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}a:focus-visible,summary:focus-visible{outline:3px solid #e5ac45;outline-offset:5px}img{max-width:100%;display:block}header{max-width:1280px;margin:auto;min-height:88px;padding:20px 40px;display:flex;justify-content:space-between;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:12px;font-size:21px;font-weight:750;white-space:nowrap}.brand img{border-radius:11px}nav{display:flex;gap:30px;font-size:14px}nav a:hover,.textlink:hover{color:var(--blue)}main{max-width:1280px;margin:auto;padding:0 40px}h1,h2,h3,p{margin:0}h1{font-size:clamp(36px,4.5vw,60px);line-height:1.22;letter-spacing:-2px;font-weight:800}h2{font-size:32px;line-height:1.4;letter-spacing:-.7px}h3{font-size:22px;line-height:1.5}.eyebrow{color:var(--blue);font-size:13px;letter-spacing:1px;font-weight:700;margin-bottom:16px}.hero{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;padding:64px 0 70px}.hero h1 span{color:var(--blue)}.lead{color:var(--muted);font-size:19px;line-height:1.9;margin-top:24px}.actions{display:flex;gap:12px;margin:28px 0 20px;flex-wrap:wrap}.button{display:inline-flex;justify-content:center;align-items:center;gap:22px;padding:13px 23px;border-radius:12px;background:var(--blue);color:white;font-size:15px;font-weight:650;min-height:48px}.button:hover{filter:brightness(.95)}.button.light{background:#e7effc;color:#285998}.quiet{font-size:12px;color:var(--muted)}.heroart{position:relative;padding:0 0 45px 15px}.room{width:100%;height:345px;object-fit:cover;border-radius:26px}.measure{position:absolute;left:35px;right:20px;top:175px;color:white;display:flex;align-items:center;justify-content:space-around;text-shadow:0 1px 5px #244062;background:#21497470;border-radius:8px;font-size:22px}.measure b{font-size:13px;font-weight:500}.mini{position:relative;margin:-25px 24px 0 -15px;padding:17px;background:white;border:1px solid var(--line);border-radius:20px;display:flex;align-items:center;gap:17px;box-shadow:0 15px 50px #243f5910}.mini img{width:70px;height:90px;object-fit:cover;border-radius:10px}.mini b{font-size:17px}.mini p{font-size:12px;color:var(--muted);margin:4px 0}.dots{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--muted)}.dots i{width:13px;height:13px;background:#fff;border:1px solid #ccd9e8;border-radius:50%}.dots i:nth-child(2){background:#478be0}.dots i:nth-child(3){background:#d87879}.illustration{position:absolute;bottom:15px;right:0;font-size:11px;color:#7b889b}.trust{display:grid;grid-template-columns:repeat(3,1fr);border-block:1px solid var(--line);padding:24px 0;gap:24px}.trust div{display:flex;align-items:center;gap:12px;justify-content:center}.trust b{font-size:15px}.trust span{font-size:12px;color:var(--muted)}.section{padding-top:76px}.sectionhead{margin-bottom:28px}.sectionhead p{color:var(--muted);margin-top:12px}.featured{display:grid;grid-template-columns:1fr 1fr;gap:24px}.feature{overflow:hidden;background:#fff;border-radius:22px;border:1px solid var(--line)}.featureimage{height:235px;position:relative;background:#eaf0f6}.featureimage img{height:100%;width:100%;object-fit:cover}.feature:nth-child(2) .featureimage img{object-position:center 32%}.featureimage span{position:absolute;bottom:12px;right:12px;background:#ffffffd9;border-radius:6px;padding:2px 8px;font-size:11px}.featurebody{padding:28px}.featurebody .eyebrow{margin-bottom:8px}.featurebody p{color:var(--muted);font-size:15px;margin:12px 0}.tags{font-size:12px;color:#537bad;margin:16px 0}.textlink{font-weight:650;font-size:14px;color:var(--blue)}.featurebody small{display:block;font-size:12px;line-height:1.7;color:var(--muted);margin-top:20px;padding-top:16px;border-top:1px solid var(--line)}.toolgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.tool{border:1px solid var(--line);border-radius:18px;background:#fff;padding:25px;transition:transform .15s,border-color .15s}.tool:hover{transform:translateY(-3px);border-color:#a7c1e6}.toolnum{display:inline-block;padding:4px 10px;background:#edf3fe;border-radius:8px;color:var(--blue);font-size:13px;font-weight:650;margin-bottom:20px}.tool h3{display:flex;justify-content:space-between;font-size:19px}.tool h3 span{color:#7d9cc2}.tool p{font-size:14px;color:var(--muted);margin:12px 0 22px}.tool small{font-size:11px;color:#6683a5}.getting{display:grid;grid-template-columns:1fr 1fr;gap:50px;background:#eaf1fd;border-radius:22px;padding:40px;margin-top:70px}.getting p{margin-top:14px;color:var(--muted);font-size:14px}.getting ol{margin:0;padding-left:24px}.getting li{padding:0 0 16px 8px;color:var(--blue)}.getting li b{display:block;color:var(--ink)}.getting li span{font-size:13px;color:var(--muted)}.helpbanner{padding:55px 0 30px;display:flex;align-items:center;justify-content:space-between;gap:25px}.helpbanner h2{font-size:27px}.helpbanner p{color:var(--muted);font-size:14px;margin-top:10px}.release{text-align:center;color:var(--muted);font-size:12px;margin:14px 0 48px}footer{max-width:1200px;margin:0 auto;padding:35px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:20px;font-size:13px;color:var(--muted)}footer .brand{font-size:18px;color:var(--ink)}footer p{margin:10px 0}.footerlinks{display:flex;gap:14px 24px;flex-wrap:wrap;justify-content:flex-end;align-content:start}footer small{grid-column:1/-1;font-size:11px}.pageintro{padding:50px 0 35px}.pageintro h1{font-size:42px}.pageintro p{margin-top:17px;color:var(--muted)}.helplayout{display:grid;grid-template-columns:225px minmax(0,1fr);gap:35px;padding-bottom:70px;align-items:start}.toc{position:sticky;top:25px;max-height:calc(100vh - 50px);overflow:auto;padding:20px;background:#edf2f9;border-radius:16px}.toc b{display:block;font-size:13px;margin-bottom:10px}.toc a{display:block;padding:8px 0;font-size:13px;color:var(--muted);line-height:1.6}.toc a:hover{color:var(--blue)}.guide{padding:32px;background:white;border:1px solid var(--line);border-radius:18px;margin-bottom:24px;scroll-margin-top:24px}.guide h2{font-size:26px}.guide>p{color:var(--muted);margin-top:12px}.guide ol{padding-left:24px;margin:24px 0}.guide li{padding-left:8px;margin:12px 0;font-size:15px}.guide li::marker{color:var(--blue);font-weight:700}.note{background:#eff5ff;border-radius:12px;padding:17px 20px;font-size:13px;color:#4b6484}.note b{color:#2e609d}.note p{margin-top:5px}.legalbody{padding:36px 42px;background:white;border:1px solid var(--line);border-radius:18px}.legalbody section{margin-bottom:30px;scroll-margin-top:25px}.legalbody h2{font-size:21px;margin-bottom:15px}.legalbody p{font-size:15px;line-height:1.95;color:#455a73;overflow-wrap:anywhere}details{border-bottom:1px solid var(--line);padding:16px 0}summary{cursor:pointer;font-size:15px;font-weight:650}details p{margin-top:12px;color:var(--muted);font-size:14px}#faq .button{margin-top:25px}.skip{position:absolute;left:10px;top:-80px;background:white;padding:10px;z-index:10}.skip:focus{top:10px}
@media(max-width:900px){.hero{gap:25px}.trust div{flex-direction:column;gap:0}.toolgrid{grid-template-columns:repeat(2,1fr)}.heroart .room{height:300px}.helplayout{grid-template-columns:180px minmax(0,1fr);gap:20px}.legalbody{padding:26px}.mini b{font-size:14px}}
@media(max-width:640px){header{padding:17px 20px;min-height:76px;gap:12px;flex-wrap:wrap}.brand{font-size:19px}nav{gap:17px;font-size:12px}main{padding:0 20px}h1{font-size:39px;letter-spacing:-1.5px}h2{font-size:26px}.hero{grid-template-columns:1fr;padding:35px 0 24px;gap:26px}.hero .lead{font-size:16px;margin-top:20px}.heroart{padding-left:10px}.heroart .room{height:260px}.measure{top:140px}.mini{margin-right:12px}.mini b{font-size:16px}.quiet{font-size:11px}.trust{gap:8px;padding:18px 0}.trust b{font-size:13px}.trust span{font-size:10px;text-align:center}.section{padding-top:44px}.sectionhead p{font-size:14px}.featured{grid-template-columns:1fr;gap:20px}.featureimage{height:210px}.featurebody{padding:22px}.toolgrid{gap:12px}.tool{padding:17px}.tool h3{font-size:17px}.tool p{font-size:13px}.tool small{font-size:10px}.getting{grid-template-columns:1fr;padding:26px;gap:24px;margin-top:40px}.helpbanner{flex-direction:column;align-items:start;padding-top:38px}.helpbanner h2{font-size:24px}footer{margin:0 20px;padding:25px 0;grid-template-columns:1fr}.footerlinks{justify-content:start}.pageintro{padding:28px 0}.pageintro h1{font-size:32px;letter-spacing:-1px}.pageintro p{font-size:14px}.helplayout{display:block;padding-bottom:30px}.toc{position:static;max-height:none;display:flex;flex-wrap:wrap;gap:6px 16px;margin-bottom:20px;padding:17px}.toc b{width:100%;margin:0}.toc a{font-size:12px;padding:4px 0}.guide{padding:23px 20px}.guide h2{font-size:23px}.guide>p,.guide li{font-size:14px}.guide .eyebrow{font-size:11px}.legalbody{padding:25px 20px}.legalbody h2{font-size:19px}.legalbody p{font-size:15px}.legalintro h1{font-size:29px}.button{font-size:14px;padding:12px 19px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.tool{transition:none}}
.feature:nth-child(2) .featureimage{background:#e6effb}.feature:nth-child(2) .featureimage img{object-fit:contain;object-position:center}.mini img{object-position:center 25%}

/* V3: 每项功能用操作示意与编号步骤解释。 */
.tool{padding:0;overflow:hidden;display:flex;flex-direction:column}.toolvisual{position:relative;background:linear-gradient(130deg,#edf4fd,#e8f0f9);padding:12px 18px 17px;border-bottom:1px solid #e2eaf4}.toolvisual svg{display:block;width:100%;height:auto}.toolvisual>span{position:absolute;right:12px;bottom:7px;font-size:10px;color:#667f9e}.toolcopy{padding:24px;display:flex;flex-direction:column;flex:1}.tool h3{font-size:21px}.tool .toolsummary{min-height:50px;margin:12px 0 20px}.quicksteps{list-style:none;counter-reset:step;margin:0;padding:0;display:grid;gap:17px}.quicksteps li{counter-increment:step;position:relative;padding-left:33px}.quicksteps li:before{content:counter(step);position:absolute;left:0;top:1px;display:grid;place-items:center;width:23px;height:23px;background:#e8f0fe;color:#3575d9;border-radius:7px;font-size:12px;font-weight:700}.quicksteps b{display:block;font-size:14px;line-height:1.65}.quicksteps span{display:block;color:#61758c;font-size:12px;line-height:1.8;margin-top:3px}.tool .toolnote{font-size:11px;line-height:1.8;color:#6c7f95;margin:22px 0 18px;padding-top:16px;border-top:1px solid #e2eaf4}.toolbottom{margin-top:auto;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between}.toolbottom small{font-size:11px}.toolbottom .textlink{font-size:13px;min-height:44px;display:inline-flex;align-items:center}.guide .toolvisual{margin:20px 0;border:0;border-radius:12px;max-width:420px}.guide .toolvisual svg{max-height:175px}
@media(max-width:640px){.toolgrid{grid-template-columns:1fr;gap:22px}.toolcopy{padding:23px}.toolvisual{padding:14px 24px 20px}.toolvisual svg{max-height:180px}.tool .toolsummary{min-height:0;font-size:14px}.quicksteps b{font-size:15px}.quicksteps span{font-size:13px}.tool .toolnote{font-size:12px}.tool h3{font-size:22px}}

/* V4: shared language controls and light theme guide. */
[hidden]{display:none!important}header{gap:18px;flex-wrap:wrap}header nav{margin-left:auto;flex-wrap:wrap}.language-switch{display:flex;gap:4px;flex-shrink:0}.language-switch button{font:inherit;font-size:13px;padding:8px 11px;border-radius:9px;border:1px solid #cbdaf0;background:#fff;color:#29486e;cursor:pointer}.language-switch button[aria-pressed="true"]{background:#3478d7;color:white;border-color:#3478d7}.language-switch button:focus-visible{outline:3px solid #9bc4ff;outline-offset:3px}.legalcontent{max-width:900px;margin:30px auto 70px;padding:32px;background:white;border-radius:20px}.legalcontent h1{font-size:32px;line-height:1.35}.legalcontent h2{font-size:20px;margin-top:32px}.legalcontent p{line-height:1.9;overflow-wrap:anywhere}.theme-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin:28px 0}.theme-sample{min-height:132px;padding:18px;border-radius:18px;display:flex;flex-direction:column;justify-content:space-between;color:#29486e}.theme-sample span{font-size:28px}.theme-sample b{font-size:14px}.classic{background:#e7f0fd}.aurora{background:linear-gradient(145deg,#e7e3fa,#fafbff,#e0f4ee)}.glacier{background:linear-gradient(145deg,#dcf1f6,#fafbff,#e7ecfc)}.starlight{background:linear-gradient(145deg,#e2ebfc,#fafbff,#efe5f8)}.peach{background:linear-gradient(145deg,#fbe5e5,#fafbff,#fff0df)}html[lang="en"] .hero h1{font-size:clamp(38px,4vw,64px);line-height:1.12}html[lang="en"] .mini{align-items:center}html[lang="en"] .mini b{font-size:16px}html[lang="en"] .measure b{font-size:12px}.mini{min-width:0}.mini>div{min-width:0}
@media(max-width:800px){header nav{order:3;width:100%;margin:0;justify-content:flex-start;gap:20px}.language-switch{margin-left:auto}.theme-grid{grid-template-columns:repeat(2,1fr)}.legalcontent{margin:16px;padding:22px}html[lang="en"] .hero h1{font-size:42px}.heroart .mini{width:95%;left:0}.mini p{overflow-wrap:anywhere}}
@media(max-width:420px){header{gap:12px}.language-switch button{padding:8px;font-size:12px}.brand{font-size:19px}.mini{padding:14px}.mini img{width:58px}.mini b{font-size:15px}.mini p,.mini .dots{font-size:11px}.measure{left:5%;right:5%}}

/* 备案号在桌面与手机端均可读、可点击。 */
footer .icp-record{display:block;flex-basis:100%;grid-column:1/-1;margin-top:8px;line-height:1.8;overflow-wrap:anywhere}footer .icp-record a{text-decoration:underline;text-underline-offset:3px}