:root {
  --paper: #fff;
  --surface: #f6f8fb;
  --ink: #111317;
  --muted: #606771;
  --dim: #8a919a;
  --line: #e1e5ea;
  --blue: #0878f9;
  --blue-dark: #0062d4;
  --blue-soft: #edf5ff;
  --green: #1daf66;
  --shadow: 0 26px 80px rgba(35,55,82,.12);
  --shadow-sm: 0 12px 32px rgba(35,55,82,.1);
  --ease: cubic-bezier(.16,1,.3,1);
  color-scheme: light;
  font-family: "Microsoft YaHei UI","Microsoft YaHei","PingFang SC","HarmonyOS Sans SC","MiSans","Segoe UI",system-ui,sans-serif;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  background: var(--paper);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;min-width:320px}
body{margin:0;overflow-x:hidden;background:var(--paper)}
a{color:inherit}
img{display:block;max-width:100%}
.skip-link{position:fixed;z-index:60;left:1rem;top:-4rem;padding:.75rem 1rem;color:#fff;background:var(--blue);border-radius:8px}.skip-link:focus{top:1rem}

.site-header,main,footer{width:min(1220px,calc(100% - 56px));margin-inline:auto}
.site-header{height:72px;display:flex;align-items:center;gap:42px;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;gap:11px;align-items:center;text-decoration:none;font-weight:700;white-space:nowrap}
.brand-mark{width:31px;height:31px;position:relative;display:inline-block}
.brand-mark i{position:absolute;left:0;height:6px;background:var(--blue);border-radius:4px}.brand-mark i:nth-child(1){width:29px;top:4px}.brand-mark i:nth-child(2){width:21px;top:13px}.brand-mark i:nth-child(3){width:13px;top:22px}
.site-header nav{display:flex;align-items:center;gap:30px;margin-right:auto}.site-header nav a{position:relative;padding:26px 0;text-decoration:none;color:#353a40;font-size:14px}.site-header nav a::after{content:"";position:absolute;right:0;bottom:18px;left:0;height:2px;background:var(--blue);transform:scaleX(0);transition:transform .2s ease}.site-header nav a:hover::after{transform:scaleX(1)}
.header-download{min-height:40px;display:inline-flex;align-items:center;gap:8px;padding:0 18px;color:#fff;background:var(--blue);border-radius:7px;text-decoration:none;font-size:14px;font-weight:700;box-shadow:0 10px 24px rgba(8,120,249,.18);transition:background .2s ease,transform .2s ease}.header-download:hover{background:var(--blue-dark);transform:translateY(-1px)}

/* 首屏 */
.hero{position:relative;min-height:620px;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:clamp(36px,6vw,84px);padding:78px 0 88px;overflow:clip}
.hero::after{content:"";position:absolute;z-index:-2;right:-180px;top:-150px;width:720px;height:720px;border-radius:50%;background:radial-gradient(circle,#e8f3ff 0,#f5f9ff 48%,transparent 70%)}
.hero-copy{position:relative;z-index:3;min-width:0;animation:rise-in .8s var(--ease) both}
.product-name{margin:0 0 18px;color:var(--blue);font:700 14px/1.2 Consolas,monospace;letter-spacing:.1em}
h1{margin:0;font-size:clamp(36px,3.9vw,50px);font-weight:700;line-height:1.28;letter-spacing:0;word-break:keep-all;overflow-wrap:normal}h1 em{color:var(--blue);font-style:normal}
.lead{max-width:560px;margin:26px 0 0;color:var(--muted);font-size:17px;line-height:1.85}
.hero-actions{display:flex;align-items:center;gap:26px;margin-top:34px}
.primary-action{min-height:54px;display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:0 26px;color:#fff;background:var(--blue);border-radius:8px;box-shadow:0 16px 34px rgba(8,120,249,.24);text-decoration:none;font-size:15px;font-weight:700;transition:transform .2s ease,background .2s ease,box-shadow .2s ease}.primary-action:hover{transform:translateY(-2px);background:var(--blue-dark);box-shadow:0 20px 40px rgba(8,120,249,.3)}
.secondary-action{padding:12px 0;border-bottom:1px solid #949aa2;text-decoration:none;color:#3f454c;font-size:14px}
.sys-req{margin:30px 0 0;color:#707780;font-size:13px}.sys-req::before{content:"";display:inline-block;width:6px;height:6px;margin-right:8px;border-radius:50%;background:var(--green)}

.hero-shot{position:relative;z-index:2;margin:0;animation:preview-in .9s .1s var(--ease) both}
.window-chrome{height:44px;display:flex;align-items:center;gap:7px;padding:0 15px;background:#f4f6f9;border:1px solid #dfe5ec;border-bottom:0;border-radius:16px 16px 0 0}.window-chrome span{width:11px;height:11px;border-radius:50%;background:#d7dce2}.window-chrome span:first-child{background:#fa8a7e}.window-chrome span:nth-child(2){background:#f2c36b}.window-chrome span:nth-child(3){background:#7ec88a}.window-chrome b{position:absolute;left:0;right:0;margin-left:auto;margin-right:auto;width:max-content;color:#6b7280;font-size:12px;font-weight:600}
.hero-shot img{width:100%;height:auto;border:1px solid #dfe5ec;border-top:0;border-radius:0 0 16px 16px;box-shadow:var(--shadow)}

/* 章节标题 */
.section-heading{max-width:760px;margin:104px auto 42px;text-align:center;scroll-margin-top:90px}.section-heading>p{margin:0 0 12px;color:var(--blue);font-size:13px;font-weight:700;letter-spacing:.08em}.section-heading h2{margin:0;font-size:clamp(30px,3.6vw,42px);line-height:1.3;letter-spacing:0}.section-heading>span{display:block;margin-top:16px;color:var(--muted);line-height:1.8}

/* 核心功能 */
.feature-list{display:grid;gap:26px}
.feature-item{display:grid;grid-template-columns:.9fr 1.1fr;align-items:center;gap:clamp(28px,5vw,64px);padding:34px;background:#fff;border:1px solid var(--line);border-radius:16px;transition:box-shadow .25s ease,border-color .25s ease}.feature-item:hover{border-color:#c9d8e9;box-shadow:var(--shadow-sm)}
.feature-item.flip .feature-text{order:2}.feature-item.flip .feature-shot{order:1}
.feature-text h3{margin:0;font-size:24px;line-height:1.4;letter-spacing:0}
.feature-text p{margin:14px 0 0;color:var(--muted);font-size:14px;line-height:1.8}
.feature-shot{margin:0}.feature-shot img{width:100%;height:auto;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow-sm)}

/* 数据与安全 */
.assurance-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.assurance-card{padding:26px 24px;background:#fff;border:1px solid var(--line);border-radius:14px;transition:transform .25s var(--ease),box-shadow .25s ease,border-color .25s ease}
.assurance-card:hover{transform:translateY(-4px);border-color:#c9d8e9;box-shadow:var(--shadow-sm)}
.assurance-icon{width:46px;height:46px;display:grid;place-items:center;margin-bottom:20px;color:var(--blue);background:var(--blue-soft);border-radius:12px}
.assurance-icon svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.assurance-card h3{margin:0;font-size:17px;line-height:1.4;letter-spacing:0}
.assurance-card p{margin:10px 0 0;color:var(--muted);font-size:13px;line-height:1.7}

/* 使用流程 */
.workflow{margin-top:104px;padding:64px 60px;background:var(--surface);border-radius:22px;scroll-margin-top:90px}
.section-heading.compact{margin:0 auto 38px}
.workflow ol{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:0;padding:0}
.workflow li{position:relative;display:flex;align-items:center;justify-content:center;text-align:center;min-height:88px;padding:24px 26px;border-right:1px solid var(--line);font-size:16px;font-weight:600;line-height:1.6}
.workflow li:last-child{border-right:0}

/* 更新说明 */
.updates{scroll-margin-top:90px}
.update-card{display:grid;grid-template-columns:230px 1fr;gap:26px;align-items:start;padding:32px 36px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-sm)}
.update-meta{display:grid;gap:9px}
.version{width:max-content;padding:7px 14px;color:var(--blue-dark);background:var(--blue-soft);border-radius:99px;font:700 14px/1.2 Consolas,monospace}
.update-meta p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}
.update-card ul{margin:0;padding:0 0 0 20px;color:var(--muted);font-size:14px;line-height:2}
.update-card li::marker{color:var(--blue)}

/* 最终下载 */
.final-cta{scroll-margin-top:90px}
.cta-card{position:relative;padding:clamp(34px,5vw,58px);margin:104px 0 96px;background:linear-gradient(150deg,#0e1b2e,#16293f);border-radius:20px;overflow:hidden;text-align:center}
.cta-card::after{content:"";position:absolute;z-index:0;left:50%;top:-140px;width:560px;height:340px;transform:translateX(-50%);border-radius:50%;background:radial-gradient(circle,rgba(8,120,249,.32),transparent 68%)}
.cta-copy{position:relative;z-index:1}
.section-label{margin:0 0 14px;color:#75b6ff;font:700 12px/1.2 Consolas,monospace;letter-spacing:.1em}
.cta-card h2{margin:0;color:#fff;font-size:clamp(28px,4vw,42px);line-height:1.3;letter-spacing:0}
.cta-card h2 .version{color:#a9d2ff;background:rgba(8,120,249,.2)}
.cta-desc{margin:14px 0 30px;color:#b9c3d0;font-size:15px}
.download-button{min-width:min(100%,320px);display:inline-flex;align-items:center;justify-content:center;gap:14px;padding:18px 30px;color:#fff;background:var(--blue);border-radius:9px;text-decoration:none;font-size:16px;font-weight:700;box-shadow:0 16px 36px rgba(8,120,249,.35);transition:transform .2s ease,background .2s ease}.download-button strong{font-size:22px}.download-button:hover{transform:translateY(-2px);background:#0a86ff}
.cta-meta{margin:24px 0 0;color:#8fa0b4;font-size:14px;line-height:1.9}.cta-meta a{color:#7fc0ff;text-decoration:underline;text-underline-offset:3px}

footer{min-height:120px;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:30px 0;border-top:1px solid var(--line);color:var(--muted);font-size:12px}footer div{display:grid;gap:8px}footer b{color:var(--ink);font-size:16px}
:focus-visible{outline:3px solid rgba(8,120,249,.32);outline-offset:3px}
@keyframes rise-in{from{opacity:0;transform:translateY(25px)}to{opacity:1;transform:none}}
@keyframes preview-in{from{opacity:0;transform:perspective(1200px) rotateY(-8deg) translateX(35px)}to{opacity:1;transform:none}}
.guide-main{width:100%;max-width:none}.guide-content{margin-top:0;padding:86px 0 104px;background:var(--surface);scroll-margin-top:0}.guide-content>.section-heading,.guide-content>.usage-steps,.guide-content>.usage-faq{width:min(1220px,calc(100% - 56px));margin-inline:auto}.guide-content .section-heading{margin-top:0}.site-header nav a[aria-current="page"]::after{transform:scaleX(1)}
.guide-quickstart{width:min(1220px,calc(100% - 56px));margin:0 auto 22px;padding:26px 28px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-sm)}.guide-quickstart>div{display:flex;align-items:baseline;justify-content:space-between;gap:18px;margin-bottom:22px}.guide-quickstart p{margin:0;color:var(--blue);font-size:12px;font-weight:700;letter-spacing:.08em}.guide-quickstart h3{margin:0;font-size:20px}.guide-quickstart ol{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:0;padding:0}.guide-quickstart li{display:flex;align-items:center;gap:12px;min-width:0;padding:15px;background:var(--surface);border-radius:10px}.guide-quickstart li>b{width:30px;height:30px;flex:0 0 auto;display:grid;place-items:center;color:#fff;background:var(--blue);border-radius:8px;font:700 11px/1 Consolas,monospace}.guide-quickstart li>span{min-width:0;font-size:13px;font-weight:700;line-height:1.5}.guide-quickstart small{color:var(--muted);font-size:11px;font-weight:400}
.usage-steps{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.usage-step{position:relative;display:grid;grid-template-columns:auto minmax(0,.9fr) minmax(340px,1.1fr);gap:26px;align-items:start;padding:30px 32px;background:#fff;border:1px solid var(--line);border-radius:16px;transition:border-color .25s ease,box-shadow .25s ease}.usage-step:hover{border-color:#c9d8e9;box-shadow:var(--shadow-sm)}
.usage-step__index b{width:52px;height:52px;display:grid;place-items:center;color:var(--blue);background:var(--blue-soft);border:1px solid #d5e5fb;border-radius:14px;font:700 14px/1 Consolas,monospace}
.usage-step__content h3{margin:0;font-size:20px;line-height:1.4}.usage-step__content p{margin:12px 0 0;color:var(--muted);font-size:13px;line-height:1.85}
.usage-step__list{margin:15px 0 0;padding:0;list-style:none;display:grid;gap:9px}.usage-step__list li{position:relative;padding-left:20px;color:var(--muted);font-size:12px;line-height:1.75}.usage-step__list li::before{content:"";position:absolute;left:3px;top:9px;width:7px;height:7px;border-radius:2px;background:var(--blue)}.usage-step__list strong{color:var(--ink)}.usage-step__content .step-note{padding:10px 12px;color:#536274;background:var(--blue-soft);border-left:3px solid var(--blue);border-radius:6px;font-size:11px;line-height:1.7}
.usage-step__figure{margin:0;padding:9px;background:#f7f9fb;border:1px solid #e4e9ef;border-radius:12px}.usage-step__figure img{display:block;width:100%;height:auto;border-radius:7px}.usage-step__figure figcaption{margin-top:8px;padding:0 3px;color:var(--dim);font-size:11px;line-height:1.6}
.usage-faq{max-width:880px;margin:64px auto 0;padding:34px 38px;background:#fff;border:1px solid var(--line);border-radius:16px}.usage-faq h3{margin:0 0 8px;font-size:22px}
.faq-intro{margin:0 0 12px;color:var(--muted);font-size:13px;line-height:1.75}
.usage-faq details{border-bottom:1px solid var(--line)}.usage-faq details:last-child{border-bottom:0}
.usage-faq summary{position:relative;padding:17px 34px 17px 0;cursor:pointer;color:var(--ink);font-size:14px;font-weight:700;list-style:none}.usage-faq summary::-webkit-details-marker{display:none}
.usage-faq summary::after{content:"+";position:absolute;right:2px;top:14px;color:var(--blue);font-size:20px;font-weight:600;transition:transform .2s ease}.usage-faq details[open] summary::after{transform:rotate(45deg)}
.usage-faq details p{margin:0 0 18px;color:var(--muted);font-size:13px;line-height:1.85}
.workflow-more{display:inline-flex;align-items:center;gap:8px;margin-top:34px;padding:11px 16px;color:var(--blue);background:#fff;border:1px solid #cfe0f5;border-radius:8px;text-decoration:none;font-size:13px;font-weight:700;transition:transform .2s ease,box-shadow .2s ease}.workflow-more span{font-size:16px}.workflow-more:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}

/* 单字母推广下载页 */
.short-download{min-height:100vh;display:grid;place-items:center;padding-block:40px}.short-download .release-panel{width:min(680px,100%);padding:clamp(28px,5vw,52px);background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.short-download .section-label{margin:0 0 18px;color:var(--blue);font:700 11px/1.2 Consolas,monospace;letter-spacing:.14em}.short-download h1{font-size:clamp(30px,6vw,48px);line-height:1.25}.short-download #download-status{margin:20px 0;color:var(--muted);line-height:1.8}.short-download a{color:var(--blue);font-weight:700}

/* 滚动进场动画 */
.js-anim [data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js-anim [data-reveal].is-visible{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition:none!important}.js-anim [data-reveal]{opacity:1;transform:none}}

@media(max-width:960px){
  .site-header nav{display:none}
  .hero{grid-template-columns:1fr;padding-top:60px}.hero-copy{max-width:720px}
  .hero-shot{width:min(720px,100%);margin:0 auto}
  .feature-item{grid-template-columns:1fr;gap:24px;padding:28px}.feature-item.flip .feature-text{order:0}.feature-item.flip .feature-shot{order:0}
  .assurance-grid{grid-template-columns:repeat(2,1fr)}
  .workflow ol{grid-template-columns:1fr}.workflow li{border-right:0;border-bottom:1px solid var(--line)}.workflow li:last-child{border-bottom:0}
  .update-card{grid-template-columns:1fr}
  .guide-quickstart ol{grid-template-columns:repeat(2,1fr)}
  .usage-step{grid-template-columns:1fr;gap:18px}.usage-step__index{position:absolute;top:16px;right:16px}.usage-step__content h3{padding-right:58px}
}
@media(max-width:620px){
  .site-header,main,footer{width:min(100% - 30px,1220px)}
  .site-header{height:66px;gap:16px}
  .header-download{padding:0 14px;font-size:12px}
  .hero{min-height:auto;gap:40px;padding:46px 0 64px}
  h1{font-size:clamp(38px,12vw,50px);word-break:normal;overflow-wrap:anywhere}.lead{font-size:15px}
  .hero-actions{align-items:flex-start;flex-direction:column;gap:14px}
  .section-heading{margin-top:80px}
  .feature-item{padding:22px}
  .assurance-grid{grid-template-columns:1fr}
  .workflow{margin-inline:-15px;padding:56px 15px;border-radius:0}
  .update-card{padding:24px 20px}
  .final-cta{margin:80px 0 70px}.cta-card{padding:38px 22px}.download-button{width:100%}
  footer{align-items:flex-start;flex-direction:column}
  .guide-content{padding:64px 0 72px}.guide-content>.section-heading,.guide-content>.usage-steps,.guide-content>.usage-faq{width:min(100% - 30px,1220px)}.guide-quickstart{width:min(100% - 30px,1220px);padding:22px 18px}.guide-quickstart>div{align-items:flex-start;flex-direction:column;gap:6px}.guide-quickstart ol{grid-template-columns:1fr}.usage-step{padding:24px 18px}.usage-step__index b{width:44px;height:44px;font-size:12px}.usage-faq{margin-top:44px;padding:26px 20px}
}