:root{--paper:#f7f9fb;--white:#fff;--ink:#10243e;--muted:#607086;--blue:#185bdc;--blue-dark:#0d3c91;--mint:#53d8bc;--yellow:#ffd95a;--line:#d8e0e9;--pale:#edf4ff;--max:1240px;--radius:6px;--shadow:0 18px 50px rgba(16,36,62,.09)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:86px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background:linear-gradient(rgba(16,36,62,.026) 1px,transparent 1px);background-size:100% 28px}
a{color:inherit;text-decoration:none}
img{max-width:100%}
button,input{font:inherit}
:focus-visible{outline:3px solid rgba(24,91,220,.32);outline-offset:3px}
.site-header{position:sticky;top:0;z-index:50;height:72px;padding:0 max(24px,calc((100% - var(--max))/2));display:flex;align-items:center;justify-content:space-between;background:rgba(247,249,251,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:-.02em}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;background:var(--blue);color:#fff;border-radius:3px;font:900 18px/1 Georgia,serif;box-shadow:5px 5px 0 #b9efe4}
.site-nav{display:flex;align-items:center;gap:8px}
.site-nav>a{position:relative;padding:10px 13px;font-size:14px;font-weight:650;color:#40536b}
.site-nav>a.active::after{content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2px;background:var(--blue)}
.site-nav>a:hover{color:var(--blue)}
.site-nav .nav-cta{margin-left:8px;padding:10px 18px;color:#fff;background:var(--ink);border-radius:3px}
.nav-toggle{display:none;border:0;background:none;padding:10px}
.nav-toggle span{display:block;width:23px;height:2px;margin:5px;background:var(--ink)}
.nav-toggle b{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
.hero{max-width:var(--max);min-height:700px;margin:auto;padding:76px 24px 90px;display:grid;grid-template-columns:.86fr 1.14fr;gap:72px;align-items:center}
.kicker,.section-index{margin:0 0 18px;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.18em;text-transform:uppercase}
.kicker span{display:inline-block;margin-right:12px;padding:3px 9px;background:var(--yellow);color:var(--ink);letter-spacing:.08em}
.hero h1,.download-hero h1,.help-hero h1{margin:0;font-family:"Microsoft YaHei UI","Microsoft YaHei",sans-serif;font-size:clamp(46px,5.2vw,76px);font-weight:900;line-height:1.08;letter-spacing:-.06em}
.hero h1 em{color:var(--blue);font-style:normal}
.hero-lead,.download-title>p,.help-hero>div>p{max-width:620px;margin:28px 0;color:var(--muted);font-size:17px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.button,.download-link{white-space:nowrap;word-break:keep-all;writing-mode:horizontal-tb}
.button{min-width:148px;min-height:48px;padding:11px 20px;display:inline-flex;flex-direction:row;align-items:center;justify-content:center;border:1px solid var(--ink);border-radius:3px;font-size:14px;font-weight:800;transition:.2s ease}
.button:hover{transform:translateY(-2px)}
.button.primary{border-color:var(--blue);background:var(--blue);color:#fff;box-shadow:6px 6px 0 #b9efe4}
.button.secondary{background:#fff}
.hero-notes{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:38px 0 0;padding-top:20px;border-top:1px solid var(--line)}
.hero-notes dt{font-size:13px;font-weight:800}
.hero-notes dd{margin:3px 0 0;color:var(--muted);font-size:12px}
.hero-media{position:relative;align-self:center}
.hero-media>img{display:block;width:100%;height:auto;object-fit:contain;object-position:center;border:1px solid #ccd8e6;border-radius:4px;box-shadow:var(--shadow)}
.proof-rail{position:relative;width:104%;margin:22px 0 0 -4%;padding:12px;display:grid;grid-template-columns:1fr 66px 1fr 66px 1fr;align-items:center;background:#fff;border:1px solid var(--line);box-shadow:0 10px 25px rgba(16,36,62,.06)}
.proof-step{min-height:80px;padding:10px 12px;border-left:3px solid var(--line)}
.proof-step.digest{border-color:var(--yellow);background:#fffdf1}
.proof-step.finish{border-color:var(--mint);background:#f0fcf9}
.proof-step span{display:block;color:var(--muted);font-size:10px;letter-spacing:.16em}
.proof-step strong{display:block;margin:4px 0;font-size:14px}
.proof-step i{display:block;color:var(--muted);font-size:10px;font-style:normal}
.proof-line{text-align:center;color:var(--muted)}
.proof-line b{display:block;color:var(--blue);font-size:22px}
.proof-line b::after{content:"→"}
.proof-line small{font-size:9px;white-space:nowrap}
.margin-note{position:absolute;top:34px;right:-25px;width:178px;padding:14px;background:#fff7c9;border:1px solid #e5c843;box-shadow:6px 8px 0 rgba(16,36,62,.1)}
.margin-note::before{content:"";position:absolute;left:-30px;top:24px;width:30px;border-top:1px solid #c7a824}
.margin-note b{font-size:10px;letter-spacing:.12em}
.margin-note p{margin:5px 0 0;font-size:11px;line-height:1.55}
.section{max-width:var(--max);margin:0 auto;padding:105px 24px}
.section-head{display:grid;grid-template-columns:180px 1fr .7fr;gap:32px;align-items:end;margin-bottom:48px;padding-bottom:24px;border-bottom:2px solid var(--ink)}
.section-head h2,.compare-copy h2,.faq-intro h2,.install-strip h2,.sync-copy h2,.download-help-band h2,.contact-sheet h2{margin:0;font-size:clamp(30px,3.2vw,46px);line-height:1.18;letter-spacing:-.045em}
.section-head p:last-child{margin:0;color:var(--muted)}
.section-head.compact{grid-template-columns:180px 1fr}
.section-head.centered{display:block;text-align:center;border:0}.section-head.centered h2{margin-bottom:12px}
.feature-section{border-top:1px solid var(--line)}
.feature-ledger{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);border-left:1px solid var(--line)}
.feature-item{min-height:150px;padding:26px;display:grid;grid-template-columns:54px 1fr auto;gap:18px;align-items:start;background:rgba(255,255,255,.72);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.feature-item:nth-child(3n+2){background:#f0fcf9}
.feature-symbol,.os-icon{width:46px;height:46px;display:grid;place-items:center;background:var(--ink);color:#fff;border-radius:2px;font-weight:900}
.feature-item h3{margin:0 0 7px;font-size:19px}.feature-item p{margin:0;color:var(--muted);font-size:14px}.feature-item small{padding-top:4px;color:#8390a2;font:700 9px/1 Arial;letter-spacing:.08em}
.compare-section{max-width:none;padding-left:max(24px,calc((100% - var(--max))/2));padding-right:max(24px,calc((100% - var(--max))/2));display:grid;grid-template-columns:.7fr 1.3fr;gap:70px;background:var(--ink);color:#fff}
.compare-copy>p:not(.section-index){color:#b8c5d5}.check-list{padding:0;list-style:none}.check-list li{padding:12px 0;border-bottom:1px solid #30435b}.check-list li::before{content:"✓";margin-right:12px;color:var(--mint)}
.page-compare{display:grid;grid-template-columns:1fr 80px 1fr;align-items:center}
.paper{min-height:400px;padding:26px;background:#fff;color:var(--ink);box-shadow:12px 14px 0 rgba(0,0,0,.16)}
.paper header{display:grid;grid-template-columns:1fr auto;gap:3px;padding-bottom:14px;border-bottom:2px solid var(--ink)}.paper header span{font-size:10px;letter-spacing:.14em}.paper header b{grid-row:2}.paper header i{grid-row:1/3;grid-column:2;font:700 32px/1 Georgia;color:#d7dde5}
.paper h3{margin:30px 0 20px;font-size:19px}.paper h4{font-size:13px}.paper p{height:8px;margin:12px 0;background:#d9e0e8}.paper p:nth-of-type(even){width:84%}.paper mark{display:inline-block;margin-top:20px;padding:4px 8px;background:#fff0a6;font-size:10px}
.paper.after{min-height:340px}.paper.after p{background:#b9efe4}.edit-axis{text-align:center}.edit-axis span,.edit-axis small{display:block;color:#aab8c9;font-size:10px}.edit-axis b{display:block;color:var(--mint);font-size:30px}
.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.platform-item{padding:28px 22px;background:#fff;border-top:4px solid var(--ink);box-shadow:0 5px 0 #dce4ed}.platform-item h3{margin:20px 0 2px}.platform-item p{min-height:48px;margin:0 0 22px;color:var(--muted);font-size:12px}.platform-item .button{width:100%;min-width:130px}
.scenario-layout{display:grid;grid-template-columns:1.15fr .85fr;grid-template-rows:auto auto;gap:16px}.scenario-item{position:relative;min-height:310px;padding:32px;display:flex;overflow:hidden;background:#eaf0f7}.scenario-item>div{position:relative;z-index:2;max-width:48%}.scenario-item span{font-size:11px;color:var(--blue)}.scenario-item h3{margin:18px 0 8px;font-size:26px}.scenario-item p{color:#53667c;font-size:13px}.scenario-item a{font-size:12px;font-weight:800;color:var(--blue)}.scenario-item img{position:absolute;right:0;bottom:0;width:53%;height:100%;object-fit:cover}.scenario-item.personal{grid-row:1/3;min-height:636px}.scenario-item.personal>div{max-width:58%}.scenario-item.personal img{width:100%;height:48%}.scenario-item.student{background:#fff7cf}.scenario-item.enterprise{background:#e6faf5}
.quote-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.testimonial-item{margin:0;padding:30px;background:#fff;border:1px solid var(--line)}.testimonial-item blockquote{min-height:104px;margin:0;font-family:KaiTi,"Microsoft YaHei",serif;font-size:17px;line-height:1.8}.testimonial-item figcaption{padding-top:20px;display:flex;gap:12px;align-items:center;border-top:1px solid var(--line)}.avatar{width:42px;height:42px;display:grid;place-items:center;border-radius:50%;background:#bdd6ff;color:var(--blue-dark);font-weight:900}.avatar-two{background:#fff0a6}.avatar-three{background:#b9efe4}.testimonial-item b,.testimonial-item small{display:block}.testimonial-item small{color:var(--muted);font-size:11px}
.pricing-section{max-width:none;padding-left:max(24px,calc((100% - 1120px)/2));padding-right:max(24px,calc((100% - 1120px)/2));background:#eef3f8}
.pricing-grid{display:grid;grid-template-columns:1fr 1.08fr 1fr;gap:16px;align-items:center}.plan-item{padding:38px;background:#fff;border:1px solid var(--line)}.plan-item.featured{padding-top:54px;padding-bottom:54px;border:2px solid var(--blue);box-shadow:10px 10px 0 #b9efe4}.plan-label{color:var(--blue);font-size:11px;font-weight:800;letter-spacing:.12em}.plan-item h3{margin:12px 0 8px;font-size:30px}.plan-item p{min-height:52px;color:var(--muted);font-size:13px}.plan-item ul{min-height:140px;padding:20px 0;list-style:none;border-top:1px solid var(--line)}.plan-item li{margin:9px 0;font-size:13px}.plan-item li::before{content:"—";margin-right:8px;color:var(--blue)}.plan-item .button{width:100%}
.faq-section{display:grid;grid-template-columns:.7fr 1.3fr;gap:90px}.faq-intro>p:not(.section-index){color:var(--muted)}.text-link{display:inline-block;margin-top:14px;color:var(--blue);font-size:13px;font-weight:800}.faq-list details,.help-group details{border-top:1px solid var(--line);background:rgba(255,255,255,.52)}.faq-list details:last-child,.help-group details:last-child{border-bottom:1px solid var(--line)}summary{padding:21px 10px;display:flex;justify-content:space-between;gap:20px;cursor:pointer;font-weight:750;list-style:none}summary::-webkit-details-marker{display:none}summary span{color:var(--blue);font-size:22px;transition:.2s}details[open] summary span{transform:rotate(45deg)}details>p{margin:0;padding:0 40px 22px 10px;color:var(--muted);font-size:14px}
.site-footer{padding:70px max(24px,calc((100% - var(--max))/2)) 24px;background:#0c1b2d;color:#d8e2ee}.footer-lead{display:grid;grid-template-columns:1fr 2fr;gap:60px;padding-bottom:45px;border-bottom:1px solid #2a3b51}.footer-brand{color:#fff}.footer-lead p{margin:0;max-width:520px;color:#9eacc0}.footer-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin:42px 0}.footer-columns h3{font-size:13px;color:#fff}.footer-columns a{display:block;margin:9px 0;color:#9eacc0;font-size:12px}.footer-columns a:hover{color:var(--mint)}.footer-bottom{padding-top:22px;display:flex;justify-content:space-between;border-top:1px solid #2a3b51;color:#72839a;font-size:11px}

/* 下载页：系统清单式布局 */
.download-hero,.help-hero{max-width:var(--max);margin:auto;padding:80px 24px 92px;display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}.device-sheet{position:relative;padding:18px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}.device-sheet::before{content:"";position:absolute;left:-14px;top:45px;width:28px;height:62%;background:repeating-linear-gradient(to bottom,var(--blue) 0 2px,transparent 2px 15px)}.sheet-tabs{display:flex;gap:24px;padding:0 8px 12px;border-bottom:1px solid var(--line);font-size:11px}.sheet-tabs span{color:var(--muted)}.sheet-tabs .selected{color:var(--blue);font-weight:800}.device-sheet img{display:block;width:100%;height:300px;object-fit:cover;object-position:center top}.sheet-caption{padding:16px 8px 0;display:flex;justify-content:space-between;gap:20px}.sheet-caption b{font-size:13px}.sheet-caption small{color:var(--muted);font-size:10px}
.download-board{max-width:var(--max);margin:auto;padding:0 24px 110px;display:grid;grid-template-columns:270px 1fr;gap:65px}.download-aside{position:sticky;top:110px;align-self:start;padding-top:20px;border-top:3px solid var(--ink)}.download-aside h2{font-size:34px;margin:0}.download-aside>p:not(.section-index){color:var(--muted);font-size:13px}.aside-rule{margin-top:40px;padding:18px;background:#fff5bc}.aside-rule span,.aside-rule b{display:block}.aside-rule span{font-size:10px;letter-spacing:.1em}.aside-rule b{margin-top:6px;font-size:13px}.download-rows{border-top:1px solid var(--line)}.download-row{padding:28px 0;display:grid;grid-template-columns:60px 1fr auto;gap:20px;align-items:center;border-bottom:1px solid var(--line)}.download-row h3{margin:0;font-size:21px}.download-row p{margin:2px 0;color:var(--muted);font-size:12px}.download-row ul{display:flex;gap:20px;margin:10px 0 0;padding:0;list-style:none;font-size:10px;color:#64758b}.download-row li::before{content:"·";margin-right:5px;color:var(--blue)}.download-row .button{min-width:168px}
.install-strip{padding:90px max(24px,calc((100% - var(--max))/2));display:grid;grid-template-columns:.55fr 1.45fr;gap:70px;background:var(--ink);color:#fff}.install-steps{margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);list-style:none}.install-steps li{padding:0 28px;border-left:1px solid #34465c}.install-steps span{width:32px;height:32px;display:grid;place-items:center;background:var(--yellow);color:var(--ink);font-weight:900}.install-steps h3{margin:26px 0 8px}.install-steps p{color:#a9b7c9;font-size:12px}
.sync-spread{max-width:var(--max);margin:auto;padding:110px 24px;display:grid;grid-template-columns:1.15fr .85fr;gap:70px;align-items:center}.sync-image{padding:0 40px 40px 0;border-right:1px solid var(--blue);border-bottom:1px solid var(--blue)}.sync-image img{display:block;width:100%;height:430px;object-fit:cover}.sync-copy>p:not(.section-index){color:var(--muted)}.sync-copy dl{margin:30px 0}.sync-copy dl div{padding:14px 0;display:grid;grid-template-columns:90px 1fr;border-top:1px solid var(--line)}.sync-copy dt{font-weight:800}.sync-copy dd{margin:0;color:var(--muted);font-size:12px}.download-help-band{max-width:var(--max);margin:0 auto 110px;padding:42px;display:flex;justify-content:space-between;align-items:center;gap:30px;background:#fff6c9;border-left:6px solid var(--yellow)}

/* 帮助页：手册目录式布局 */
.help-figure{margin:0;position:relative}.help-figure img{display:block;width:100%;height:auto;border:1px solid var(--line);box-shadow:var(--shadow)}.help-figure figcaption{position:absolute;left:-28px;bottom:-25px;padding:16px 24px;background:var(--ink);color:#fff;box-shadow:7px 7px 0 var(--mint)}.help-figure figcaption span,.help-figure figcaption b{display:block}.help-figure figcaption span{color:#a8b6c8;font-size:9px;letter-spacing:.15em}.help-figure figcaption b{margin-top:5px;font-size:12px}
.help-search{max-width:560px;margin-top:32px}.help-search>label{display:block;margin-bottom:7px;font-size:11px;font-weight:800}.help-search>div{display:flex}.help-search input{min-width:0;flex:1;padding:13px 15px;border:1px solid #a9b6c6;background:#fff}.help-search button{padding:0 22px;border:0;background:var(--blue);color:#fff;font-weight:800}.help-search small{display:block;margin-top:7px;color:var(--muted);font-size:10px}
.help-directory{max-width:var(--max);margin:0 auto 100px;padding:0 24px;display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.help-directory a{padding:24px;display:grid;background:#fff;border-right:1px solid var(--line);border-bottom:1px solid var(--line);transition:.2s}.help-directory a:hover{background:#eefbf8;transform:translateY(-4px)}.help-directory span{color:var(--blue);font-size:10px}.help-directory b{margin:12px 0 4px}.help-directory small{color:var(--muted)}
.help-manual{max-width:var(--max);margin:auto;padding:0 24px 110px;display:grid;grid-template-columns:220px 1fr;gap:80px}.manual-index{position:sticky;top:110px;align-self:start;border-top:3px solid var(--ink)}.manual-index p{font-size:11px;font-weight:800;letter-spacing:.12em}.manual-index a{display:block;padding:9px 0;color:var(--muted);font-size:12px}.manual-index a:hover{color:var(--blue)}.help-group{padding:0 0 70px}.help-group header{display:grid;grid-template-columns:70px 1fr;align-items:start;margin-bottom:25px}.help-group header>span{font:700 40px/1 Georgia;color:#cfd8e4}.help-group h2{margin:0;font-size:32px}.help-group header p{margin:4px 0;color:var(--muted);font-size:12px}.help-group details.hidden{display:none}.help-group a{color:var(--blue);text-decoration:underline}
.contact-sheet{max-width:var(--max);margin:0 auto 80px;padding:50px;display:grid;grid-template-columns:1fr 1fr;gap:70px;background:#e7f9f5}.contact-sheet>div>p:not(.section-index){color:var(--muted)}.contact-lines p{padding:14px 0;display:flex;justify-content:space-between;border-bottom:1px solid #badfd7;font-size:12px}.contact-lines a{color:var(--blue);font-weight:800}.about-note{max-width:var(--max);margin:0 auto 100px;padding:0 24px;display:grid;grid-template-columns:160px 1fr}.about-note p{margin:0;color:var(--muted);font-size:12px}

@media(max-width:980px){
  .site-nav{position:absolute;top:72px;left:0;right:0;padding:14px 24px;display:none;flex-direction:column;align-items:stretch;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 14px 30px rgba(16,36,62,.1)}.site-nav.open{display:flex}.site-nav>a{padding:11px}.site-nav .nav-cta{margin:4px 0 0;text-align:center}.nav-toggle{display:block}
  .hero,.download-hero,.help-hero{grid-template-columns:1fr;gap:55px}.hero{padding-top:55px}.hero-copy{max-width:730px}.margin-note{right:8px}
  .section-head{grid-template-columns:140px 1fr}.section-head>p:last-child{grid-column:2}.feature-ledger{grid-template-columns:1fr}
  .compare-section,.faq-section,.sync-spread{grid-template-columns:1fr}.page-compare{max-width:760px}.platform-grid{grid-template-columns:1fr 1fr}
  .scenario-layout{grid-template-columns:1fr}.scenario-item.personal{grid-row:auto;min-height:440px}.scenario-item{min-height:330px}
  .quote-grid{grid-template-columns:1fr}.testimonial-item blockquote{min-height:0}.pricing-grid{grid-template-columns:1fr}.plan-item.featured{padding:38px}
  .download-board{grid-template-columns:1fr;gap:25px}.download-aside,.manual-index{position:static}.download-row{grid-template-columns:60px 1fr auto}
  .install-strip{grid-template-columns:1fr}.help-directory{grid-template-columns:1fr 1fr}.help-manual{grid-template-columns:1fr}.manual-index{display:none}
}
@media(max-width:640px){
  .site-header{height:64px;padding:0 16px}.site-nav{top:64px}.section,.hero,.download-hero,.help-hero{padding-left:18px;padding-right:18px}.hero{min-height:auto;padding-top:48px;padding-bottom:70px}.hero h1,.download-hero h1,.help-hero h1{font-size:42px}.hero-lead{font-size:15px}.hero-actions{display:grid}.hero-actions .button{width:100%}.hero-notes{grid-template-columns:1fr}
  .proof-rail{width:100%;margin:14px 0 0;grid-template-columns:1fr}.proof-line{padding:2px}.proof-line b{transform:rotate(90deg)}.proof-step{min-height:auto}.margin-note{position:relative;top:auto;right:auto;width:90%;margin:-5px 0 0 auto}.margin-note::before{display:none}
  .section{padding-top:75px;padding-bottom:75px}.section-head,.section-head.compact{display:block}.section-head .section-index{margin-bottom:12px}.section-head>p:last-child{margin-top:12px}.feature-item{grid-template-columns:46px 1fr}.feature-item small{display:none}
  .compare-section{padding-top:75px;padding-bottom:75px;gap:38px}.page-compare{grid-template-columns:1fr}.edit-axis{padding:15px}.edit-axis b{transform:rotate(90deg)}.paper{min-height:330px}
  .platform-grid{grid-template-columns:1fr}.platform-item{display:grid;grid-template-columns:48px 1fr auto;gap:14px;align-items:center;padding:20px}.platform-item h3{margin:0}.platform-item p{min-height:0;margin:3px 0}.platform-item .button{width:auto;min-width:116px}
  .scenario-item{padding:24px;min-height:390px}.scenario-item>div,.scenario-item.personal>div{max-width:100%}.scenario-item img{width:100%;height:48%;opacity:.65}.scenario-item.personal{min-height:450px}
  .pricing-section{padding-left:18px;padding-right:18px}.faq-section{gap:34px}
  .footer-lead{grid-template-columns:1fr}.footer-columns{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column;gap:8px}
  .device-sheet img{height:auto}.sheet-caption{display:block}.sheet-caption small{display:block;margin-top:4px}
  .download-board{padding-left:18px;padding-right:18px}.download-row{grid-template-columns:48px 1fr;padding:24px 0}.download-row .button{grid-column:1/3;width:100%;min-width:150px}.download-row ul{display:block}.install-steps{grid-template-columns:1fr}.install-steps li{padding:24px 0;border-left:0;border-top:1px solid #34465c}.sync-spread{padding-left:18px;padding-right:18px}.sync-image{padding:0 15px 15px 0}.sync-image img{height:auto}.download-help-band{margin:0 18px 75px;padding:28px;display:block}.download-help-band .button{margin-top:20px;width:100%}
  .help-directory{grid-template-columns:1fr;margin-bottom:70px;padding:0 18px}.help-manual{padding-left:18px;padding-right:18px}.help-group header{grid-template-columns:50px 1fr}.help-group header>span{font-size:30px}.contact-sheet{margin:0 18px 60px;padding:28px;grid-template-columns:1fr;gap:20px}.about-note{grid-template-columns:1fr;gap:8px}.help-figure figcaption{left:10px;bottom:-25px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button,.help-directory a,summary span{transition:none}}

/* Hero 最终强制覆盖：保持媒体自然比例与垂直居中 */
.hero{align-items:center!important}
.hero .hero-media{align-self:center!important;height:auto!important;min-height:0!important;max-height:none!important;padding:0!important;margin-top:0!important;margin-bottom:0!important;overflow:visible!important;clip-path:none!important;transform:none!important}
.hero .hero-media>img{display:block!important;width:100%!important;height:auto!important;min-height:0!important;max-height:none!important;margin:0!important;padding:0!important;object-fit:contain!important;object-position:center!important;clip-path:none!important;transform:none!important}