*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --green:#16a34a;--green-d:#15803d;--green-l:#dcfce7;
  --blue:#0ea5e9;--blue-d:#0284c7;
  --bg:#fff;--bg2:#f0fdf4;--text:#111;--muted:#64748b;
  --line:#d1fae5;--max:1140px;--pad:clamp(18px,4vw,32px);--sec:clamp(48px,7vw,72px);
  --sans:"Noto Sans SC",system-ui,sans-serif
}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg2);color:var(--text);line-height:1.65}
a{color:var(--green-d)}img{display:block;max-width:100%}

/* 下载站顶栏 — 绿+蓝双强调 */
.dl-header{background:linear-gradient(90deg,#0f172a 0%,#1e3a5f 100%);position:sticky;top:0;z-index:200}
.header-inner{max-width:var(--max);margin:0 auto;padding:0 var(--pad);height:62px;display:flex;align-items:center;justify-content:space-between;gap:14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:.98rem;color:#fff;text-decoration:none}
.brand img{width:34px;height:34px;border-radius:50%}
.brand em{font-style:normal;color:#4ade80;font-size:.72rem;display:block;font-weight:600}
.main-nav{display:flex;gap:3px}
.main-nav a{padding:7px 14px;text-decoration:none;color:rgba(255,255,255,.75);font-size:.82rem;font-weight:600;border-radius:6px}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.08)}
.main-nav a.on{color:#0f172a;background:#4ade80}
.nav-cta{padding:9px 18px;background:var(--green);color:#fff;font-size:.82rem;font-weight:800;text-decoration:none;border-radius:8px}
.nav-cta:hover{background:var(--green-d)}

.page{max-width:var(--max);margin:0 auto;padding:0 var(--pad)}
.crumb{padding:12px 0;font-size:.76rem;color:var(--muted)}
.crumb a{color:var(--green-d);text-decoration:none}

/* 下载落地页主横幅 */
.dl-mega-banner{background:linear-gradient(135deg,#0f172a 0%,#1e40af 50%,#0ea5e9 100%);border-radius:20px;padding:clamp(32px,5vw,48px);margin:20px 0;color:#fff;text-align:center;position:relative;overflow:hidden}
.dl-mega-banner::after{content:'';position:absolute;right:-40px;top:-40px;width:200px;height:200px;background:rgba(255,255,255,.06);border-radius:50%}
.dl-mega-banner .tag{display:inline-block;background:rgba(74,222,128,.2);color:#4ade80;font-size:.72rem;font-weight:700;padding:5px 14px;border-radius:20px;margin-bottom:12px;border:1px solid rgba(74,222,128,.3)}
.dl-mega-banner h1{font-size:clamp(1.5rem,4vw,2.2rem);font-weight:800;line-height:1.25;margin-bottom:10px;position:relative;z-index:1}
.dl-mega-banner p{font-size:.9rem;opacity:.9;max-width:580px;margin:0 auto 20px;position:relative;z-index:1}
.dl-mega-banner .domain{font-family:monospace;background:rgba(0,0,0,.25);padding:8px 16px;border-radius:8px;font-size:.85rem;display:inline-block;position:relative;z-index:1}

/* 平台下载大卡片 */
.dl-showcase{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:24px 0}
.dl-card{background:#fff;border:2px solid var(--line);border-radius:16px;padding:26px 20px;text-align:center;text-decoration:none;color:inherit;transition:.3s;position:relative}
.dl-card:hover{border-color:var(--green);box-shadow:0 12px 32px rgba(22,163,74,.15);transform:translateY(-5px)}
.dl-card.featured{border-color:var(--green);background:linear-gradient(180deg,#fff,var(--green-l))}
.dl-card .ico{font-size:2.6rem;margin-bottom:10px}
.dl-card h3{font-size:.95rem;font-weight:800;margin-bottom:4px}
.dl-card p{font-size:.76rem;color:var(--muted);margin-bottom:12px}
.dl-card .grab{display:inline-block;padding:10px 22px;background:var(--green);color:#fff;font-size:.8rem;font-weight:800;border-radius:8px;transition:.2s}
.dl-card:hover .grab{background:var(--green-d)}
.dl-card .ver{position:absolute;top:12px;right:12px;font-size:.62rem;background:var(--green-l);color:var(--green-d);padding:3px 8px;border-radius:4px;font-weight:700}

/* 步骤流 */
.step-flow{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:28px 0}
.step-node{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 10px;text-align:center;position:relative}
.step-node::after{content:'→';position:absolute;right:-14px;top:50%;transform:translateY(-50%);color:var(--green);font-weight:700;font-size:.9rem}
.step-node:last-child::after{display:none}
.step-node .n{width:30px;height:30px;margin:0 auto 8px;border-radius:50%;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:800}
.step-node p{font-size:.7rem;color:var(--muted);line-height:1.4}

/* 特性条 */
.feat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.feat-chip{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 12px;text-align:center}
.feat-chip b{display:block;font-size:1.2rem;color:var(--green);font-weight:800}
.feat-chip span{font-size:.72rem;color:var(--muted)}

.section{padding:var(--sec) 0}
.section-head{text-align:center;margin-bottom:28px}
.section-head h2{font-size:clamp(1.2rem,2.8vw,1.6rem);font-weight:800}
.section-head p{color:var(--muted);font-size:.88rem;margin-top:6px}

.platform-guide{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;margin-bottom:16px}
.platform-guide h3{font-size:.95rem;font-weight:800;color:var(--green-d);margin-bottom:12px;padding-bottom:10px;border-bottom:2px solid var(--green-l)}
.platform-guide p,.platform-guide li{font-size:.86rem;color:var(--muted);line-height:1.7;margin-bottom:8px}
.platform-guide ol,.platform-guide ul{padding-left:20px}
.platform-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:12px}

.why-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.why-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}
.why-item h3{font-size:.88rem;font-weight:700;color:var(--green-d);margin-bottom:6px}
.why-item p{font-size:.82rem;color:var(--muted);line-height:1.55}

.spec-table{width:100%;border-collapse:collapse;font-size:.84rem;margin:12px 0}
.spec-table th,.spec-table td{padding:11px 13px;border:1px solid var(--line)}
.spec-table th{background:var(--green-l);color:var(--green-d);font-weight:700;text-align:left}
.spec-table td{color:var(--muted)}
.trouble-box{background:#fff;border-left:4px solid var(--green);padding:16px 18px;border-radius:0 12px 12px 0;margin-bottom:10px}
.trouble-box h4{font-size:.86rem;font-weight:700;margin-bottom:5px}
.trouble-box p{font-size:.82rem;color:var(--muted);line-height:1.6}

.news-list{display:flex;flex-direction:column;gap:12px}
.news-item,.news-article{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px}
.news-item{display:flex;gap:14px;text-decoration:none;color:inherit}
.news-item:hover{border-color:var(--green)}
.news-item .date{flex-shrink:0;width:64px;text-align:center;padding:8px;background:var(--green-l);border-radius:10px}
.news-item .date b{display:block;font-size:1.1rem;color:var(--green-d);font-weight:800}
.news-item .date small{font-size:.62rem;color:var(--muted)}
.news-item h3,.news-article h2{font-size:.9rem;font-weight:700;margin-bottom:4px}
.news-item p,.news-article p{font-size:.84rem;color:var(--muted);line-height:1.6}
.news-article .meta{font-size:.72rem;color:var(--green-d);font-weight:600;margin-bottom:6px}
.news-article{margin-bottom:12px}
.news-source{font-size:.72rem;color:var(--muted);margin-top:12px;padding-top:10px;border-top:1px dashed var(--line)}
.news-source a{font-weight:600}
.practice-tip{background:var(--green-l);border-left:4px solid var(--green);padding:14px 16px;border-radius:0 10px 10px 0;margin:14px 0;font-size:.84rem;color:var(--muted);line-height:1.65}
.practice-tip strong{color:var(--text)}

.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.faq-box,.faq-details details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}
.faq-box h4{font-size:.86rem;font-weight:700;color:var(--green-d);margin-bottom:5px}
.faq-box p{font-size:.82rem;color:var(--muted);line-height:1.55}
.faq-details details{margin-bottom:8px;padding:0}
.faq-details summary{padding:14px 18px;font-weight:700;font-size:.86rem;cursor:pointer;list-style:none}
.faq-details summary::before{content:'+ ';color:var(--green)}
.faq-details details[open] summary::before{content:'− '}
.faq-details details p{padding:0 18px 14px;font-size:.84rem;color:var(--muted);line-height:1.65}

.site-foot{padding:28px 0 40px;border-top:1px solid var(--line);font-size:.8rem;color:var(--muted)}
.site-foot a{color:var(--green-d);text-decoration:none}
.friend-links{margin-top:8px;font-size:.76rem}

.fab-nav{position:fixed;bottom:20px;right:20px;z-index:300}
.fab-toggle{width:50px;height:50px;border-radius:12px;border:none;background:var(--green);color:#fff;font-size:1.2rem;cursor:pointer}
.fab-menu{position:absolute;bottom:58px;right:0;display:flex;flex-direction:column;gap:5px;opacity:0;pointer-events:none;transition:.2s}
.fab-nav.open .fab-menu{opacity:1;pointer-events:auto}
.fab-menu a{padding:10px 14px;background:#fff;border:1px solid var(--line);font-size:.78rem;text-decoration:none;border-radius:8px;color:var(--muted);white-space:nowrap}
.fab-menu a.on,.fab-menu a:hover{color:var(--green-d);border-color:var(--green)}

/* 移动端底部下载条 */
.mobile-dl-bar{display:none;position:fixed;bottom:0;left:0;right:0;background:#0f172a;padding:10px var(--pad);z-index:250;gap:10px}
.mobile-dl-bar a{flex:1;text-align:center;padding:12px;background:var(--green);color:#fff;font-weight:800;font-size:.84rem;text-decoration:none;border-radius:8px}

@media(max-width:900px){
  .dl-showcase,.why-row,.faq-grid,.feat-strip{grid-template-columns:1fr 1fr}
  .step-flow{grid-template-columns:1fr 1fr}
  .step-node::after{display:none}
  .main-nav{display:none}
  .mobile-dl-bar{display:flex}
  body{padding-bottom:64px}
}
@media(max-width:480px){
  .dl-showcase,.feat-strip,.why-row,.faq-grid,.step-flow,.platform-grid{grid-template-columns:1fr}
  .news-item{flex-direction:column}
}

.screenshot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:16px 0 8px}
.guide-screenshot{margin:0;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px}
.guide-screenshot img{width:100%;max-width:100%;height:auto;border-radius:10px;border:1px solid rgba(0,0,0,.06);display:block}
.guide-screenshot a{display:block;line-height:0}
.guide-screenshot a:hover img{opacity:.92}
.guide-screenshot figcaption{font-size:.72rem;color:var(--muted);margin-top:10px;line-height:1.55}
.guide-screenshot figcaption strong{color:inherit;font-weight:700}